$(LINUX26_DIR)/.patched: $(LINUX26_DIR)/.unpacked $(LINUX_HEADERS_DEPENDS)
toolchain/patch-kernel.sh $(LINUX26_DIR) toolchain/kernel-headers \
linux-$(LINUX26_VERSION)-\*.patch{,.gz,.bz2}
-ifeq ($(BR2_KERNEL_HEADERS_IPMI),y)
- toolchain/patch-kernel.sh $(LINUX26_DIR) toolchain/kernel-headers/ipmi \
- linux-$(LINUX26_VERSION)-\*.patch{,.gz,.bz2}
-endif
-ifeq ($(BR2_KERNEL_HEADERS_LZMA),y)
- toolchain/patch-kernel.sh $(LINUX26_DIR) toolchain/kernel-headers/lzma \
- linux-$(LINUX26_VERSION)-\*.patch{,.gz,.bz2}
-endif
ifeq ($(BR2_KERNEL_HEADERS_RT),y)
toolchain/patch-kernel.sh $(LINUX26_DIR) $(DL_DIR) $(LINUX_RT_SOURCE)
endif
endif
toolchain/patch-kernel.sh $(LINUX26_DIR) toolchain/kernel-headers \
linux-$(LINUX26_VERSION)-\*.patch{,.gz,.bz2}
-ifeq ($(BR2_KERNEL_HEADERS_IPMI),y)
- toolchain/patch-kernel.sh $(LINUX26_DIR) toolchain/kernel-headers/ipmi \
- linux-$(LINUX26_VERSION)-\*.patch{,.gz,.bz2}
-endif
-ifeq ($(BR2_KERNEL_HEADERS_LZMA),y)
- toolchain/patch-kernel.sh $(LINUX26_DIR) toolchain/kernel-headers/lzma \
- linux-$(LINUX26_VERSION)-\*.patch{,.gz,.bz2}
-endif
ifeq ($(BR2_KERNEL_HEADERS_RT),y)
toolchain/patch-kernel.sh $(LINUX26_DIR) $(DL_DIR) $(LINUX_RT_SOURCE)
endif
For the snapshot, you have to provide the
linux-2.6.tar.bz2 tarball in your download dir.
- config BR2_KERNEL_HEADERS_2_6_20_4
- depends on !BR2_avr32 && !BR2_nios2 && BR2_DEPRECATED
- bool "Linux 2.6.20.4 kernel headers"
-
- config BR2_KERNEL_HEADERS_2_6_20
- depends on !BR2_avr32 && !BR2_nios2 && BR2_DEPRECATED
- bool "Linux 2.6.20.x kernel headers"
-
- config BR2_KERNEL_HEADERS_2_6_21_5
- depends on !BR2_avr32 && !BR2_nios2 && BR2_DEPRECATED
- bool "Linux 2.6.21.5 kernel headers"
-
- config BR2_KERNEL_HEADERS_2_6_21
- depends on !BR2_avr32 && !BR2_nios2 && BR2_DEPRECATED
- bool "Linux 2.6.21.x kernel headers"
-
- config BR2_KERNEL_HEADERS_2_6_22_1
- depends on !BR2_avr32 && !BR2_nios2 && BR2_DEPRECATED
- bool "Linux 2.6.22.1 kernel headers"
-
- config BR2_KERNEL_HEADERS_2_6_22_10
- depends on !BR2_nios2 && BR2_DEPRECATED
- bool "Linux 2.6.22.10 kernel headers"
-
config BR2_KERNEL_HEADERS_2_6_22
depends on BR2_DEPRECATED
bool "Linux 2.6.22.x kernel headers"
endchoice
-config BR2_KERNEL_HEADERS_IPMI
- bool "use ipmi kernel patches"
- depends on BR2_KERNEL_HEADERS_2_6_20_4 || BR2_KERNEL_HEADERS_2_6_21_5 || BR2_KERNEL_HEADERS_2_6_22_1
- help
- Apply patches which add IPMI sensor support.
-
-config BR2_KERNEL_HEADERS_LZMA
- bool "use lzma initramfs kernel patches"
- depends on BR2_KERNEL_HEADERS_2_6_21_5 || BR2_KERNEL_HEADERS_2_6_22_1
- help
- Apply patches which allow for lzma compressed
- initramfs filesystems. This requires the lzma
- program in your development environment.
-
config BR2_KERNEL_HEADERS_RT
bool "use realtime (-rt) kernel patches"
depends on BR2_KERNEL_HEADERS_2_6_21_5 || BR2_KERNEL_HEADERS_2_6_22_1
config BR2_DEFAULT_KERNEL_HEADERS
string
- default "2.4.31" if BR2_KERNEL_HEADERS_2_4_31
- default "2.6.20.4" if BR2_KERNEL_HEADERS_2_6_20_4
- default "2.6.20.20" if BR2_KERNEL_HEADERS_2_6_20
- default "2.6.21.5" if BR2_KERNEL_HEADERS_2_6_21_5
- default "2.6.21.7" if BR2_KERNEL_HEADERS_2_6_21
- default "2.6.22.1" if BR2_KERNEL_HEADERS_2_6_22_1
- default "2.6.22.10" if BR2_KERNEL_HEADERS_2_6_22_10
default "2.6.22.10" if BR2_KERNEL_HEADERS_2_6_22
default "2.6.23" if BR2_KERNEL_HEADERS_2_6_23
default "2.6.24.7" if BR2_KERNEL_HEADERS_2_6_24
+++ /dev/null
-diff -rduNp linux-2.6.20.3.orig/drivers/char/ipmi/ipmi_msghandler.c linux-2.6.20.3/drivers/char/ipmi/ipmi_msghandler.c
---- linux-2.6.20.3.orig/drivers/char/ipmi/ipmi_msghandler.c 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/drivers/char/ipmi/ipmi_msghandler.c 2007-03-14 14:23:02.000000000 +0100
-@@ -1954,6 +1954,24 @@ static void remove_proc_entries(ipmi_smi
- #endif /* CONFIG_PROC_FS */
- }
-
-+/*
-+ * Retrieves the bmc_device struct for a given ipmi interface number (or NULL if none).
-+ */
-+struct device *ipmi_get_bmcdevice(int if_num)
-+{
-+ ipmi_smi_t intf;
-+ mutex_lock(&ipmi_interfaces_mutex);
-+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
-+ if (intf->intf_num == if_num){
-+ mutex_unlock(&ipmi_interfaces_mutex);
-+ return &intf->bmc->dev->dev;
-+ }
-+ }
-+ mutex_unlock(&ipmi_interfaces_mutex);
-+
-+ return NULL;
-+}
-+
- static int __find_bmc_guid(struct device *dev, void *data)
- {
- unsigned char *id = data;
-@@ -4183,3 +4201,4 @@ EXPORT_SYMBOL(ipmi_get_my_LUN);
- EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
- EXPORT_SYMBOL(ipmi_user_set_run_to_completion);
- EXPORT_SYMBOL(ipmi_free_recv_msg);
-+EXPORT_SYMBOL(ipmi_get_bmcdevice);
-diff -rduNp linux-2.6.20.3.orig/drivers/hwmon/Kconfig linux-2.6.20.3/drivers/hwmon/Kconfig
---- linux-2.6.20.3.orig/drivers/hwmon/Kconfig 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/drivers/hwmon/Kconfig 2007-03-14 14:23:02.000000000 +0100
-@@ -218,6 +218,16 @@ config SENSORS_GL520SM
- This driver can also be built as a module. If so, the module
- will be called gl520sm.
-
-+config SENSORS_IPMI
-+ tristate "IPMI Hardware Monitoring Support"
-+ depends on HWMON && IPMI_HANDLER && EXPERIMENTAL
-+ help
-+ If you say yes here you get support for sensors monitored by
-+ an IPMI baseboard management controller (BMC).
-+
-+ This driver can also be built as a module. If so, the module
-+ will be called ipmisensors.
-+
- config SENSORS_IT87
- tristate "ITE IT87xx and compatibles"
- depends on HWMON && I2C
-diff -rduNp linux-2.6.20.3.orig/drivers/hwmon/Makefile linux-2.6.20.3/drivers/hwmon/Makefile
---- linux-2.6.20.3.orig/drivers/hwmon/Makefile 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/drivers/hwmon/Makefile 2007-03-14 14:23:02.000000000 +0100
-@@ -28,6 +28,7 @@ obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o
- obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
- obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
- obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
-+obj-$(CONFIG_SENSORS_IPMI) += ipmisensors.o
- obj-$(CONFIG_SENSORS_IT87) += it87.o
- obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
- obj-$(CONFIG_SENSORS_LM63) += lm63.o
-diff -rduNp linux-2.6.20.3.orig/drivers/hwmon/ipmisensors.c linux-2.6.20.3/drivers/hwmon/ipmisensors.c
---- linux-2.6.20.3.orig/drivers/hwmon/ipmisensors.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.20.3/drivers/hwmon/ipmisensors.c 2007-03-14 14:44:42.000000000 +0100
-@@ -0,0 +1,1552 @@
-+/*
-+ * ipmisensors.c - lm-sensors/hwmon interface to IPMI sensors.
-+ *
-+ * Copyright (C) 2004-2006 Yani Ioannou <yani.ioannou@gmail.com>
-+ *
-+ * Adapted from bmcsensors (lm-sensors for linux 2.4)
-+ * bmcsensors (C) Mark D. Studebaker <mdsxyz123@yahoo.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ */
-+
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/param.h>
-+#include <linux/hwmon.h>
-+#include <linux/list.h>
-+#include <linux/slab.h>
-+#include <linux/device.h>
-+#include <linux/hwmon.h>
-+
-+#include "ipmisensors.h"
-+
-+/****** Function Prototypes ******/
-+static void ipmisensors_send_message(struct ipmisensors_bmc_data *bmc,
-+ long msgid, struct kernel_ipmi_msg *msg);
-+static void ipmisensors_reserve_sdr(struct ipmisensors_bmc_data *bmc);
-+static void ipmisensors_get_sdr(struct ipmisensors_bmc_data *bmc, u16 res_id,
-+ u16 record, u8 offset);
-+static void ipmisensors_set_sensor_threshold(struct ipmisensors_bmc_data *bmc,
-+ u8 number, int value,
-+ int lim_index);
-+static void ipmisensors_get_reading(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr);
-+static void ipmisensors_msg_handler(struct ipmi_recv_msg *msg,
-+ void *user_msg_data);
-+static int ipmisensors_intf_registered(int ipmi_intf);
-+static int ipmisensors_bmc_registered(struct device *bmc);
-+static void ipmisensors_register_bmc(int ipmi_intf, struct ipmi_addr *address);
-+static void ipmisensors_unregister_bmc(int ipmi_intf);
-+static void ipmisensors_unregister_bmc_all(void);
-+static void ipmisensors_new_smi(int if_num, struct device *dev);
-+static void ipmisensors_smi_gone(int if_num);
-+static void ipmisensors_update_bmc(struct work_struct *);
-+static void ipmisensors_cleanup(void);
-+
-+/****** Static Vars ******/
-+
-+/* set when module is being removed */
-+static int cleanup = 0;
-+
-+/* ipmisensors driver data */
-+static struct ipmisensors_data driver_data = {
-+ .driver_name = "bmc",
-+ .bmc_data = LIST_HEAD_INIT(driver_data.bmc_data),
-+ .interfaces = 0,
-+ .smi_watcher = {
-+ .owner = THIS_MODULE,
-+ .new_smi = ipmisensors_new_smi,
-+ .smi_gone = ipmisensors_smi_gone,
-+ },
-+ .ipmi_hndlrs = {
-+ .ipmi_recv_hndl = ipmisensors_msg_handler,
-+ },
-+};
-+
-+/* sensor refresh workqueue */
-+static struct workqueue_struct *ipmisensors_workqueue;
-+
-+/****** SDR List Functions ******/
-+/**
-+ * Creates a new sdrdata struct, or returns NULL if insufficient memory.
-+ */
-+static struct sdrdata *ipmisensors_new_sdr(void)
-+{
-+ struct sdrdata *sdr;
-+
-+ sdr = kmem_cache_alloc(driver_data.sdrdata_cache, GFP_ATOMIC);
-+ if (sdr) {
-+ memset(sdr, 0, sizeof(struct sdrdata));
-+ } else {
-+ printk(KERN_ERR
-+ "ipmisensors: Couldn't allocate memory for new SDR\n");
-+ }
-+
-+ return sdr;
-+}
-+
-+/**
-+ * Adds the given sdrdata struct to the given bmc's SDR list.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static inline void ipmisensors_add_sdr(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr)
-+{
-+ list_add(&sdr->list, &bmc->sdrs);
-+ printk(KERN_DEBUG
-+ "ipmisensors: SDR %d: type 0x%02x (%s)\n",
-+ bmc->sdr_count, sdr->stype, sdr->id);
-+ bmc->sdr_count++;
-+}
-+
-+/**
-+ * Cleanup the sdr list for the given BMC.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static void ipmisensors_sdr_cleanup(struct ipmisensors_bmc_data *bmc)
-+{
-+ struct sdrdata *cursor, *next;
-+
-+ /* find and free each sdr data struct */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ device_remove_file(bmc->dev, &cursor->attr.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_min.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_max.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_label.dev_attr);
-+
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+
-+ list_del(&cursor->list);
-+ kmem_cache_free(driver_data.sdrdata_cache, cursor);
-+ }
-+}
-+
-+/* worker function for workqueue ipmisensors_workqueue */
-+static void ipmisensors_update_bmc(struct work_struct *work)
-+{
-+ struct ipmisensors_bmc_data *bmc = container_of(work, struct ipmisensors_bmc_data, update_work.work);
-+
-+ /* don't start an update cycle if one already in progress */
-+ if (bmc->state != STATE_READING) {
-+ struct sdrdata *cursor, *next;
-+ bmc->state = STATE_READING;
-+ printk(KERN_DEBUG "ipmisensors: starting update\n");
-+
-+ /* init semaphore to 1 for update cycle */
-+ sema_init(&bmc->update_semaphore, 1);
-+
-+ /* update each sdr reading */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ ipmisensors_get_reading(bmc, cursor);
-+ }
-+ }
-+
-+ /* wait for readings (need timeout?) */
-+ down_interruptible(&bmc->update_semaphore);
-+
-+ printk(KERN_DEBUG "ipmisensors: update complete\n");
-+
-+ bmc->state = STATE_DONE;
-+
-+ /* if the module isn't cleaning up, schedule another update */
-+ if (!cleanup)
-+ queue_delayed_work(ipmisensors_workqueue, &bmc->update_work,
-+ bmc->update_period * HZ);
-+}
-+
-+/****** IPMI Message Sending ******/
-+
-+/**
-+ * Send a message to the IPMI BMC
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @msgid: the message id to use.
-+ * @msg: the ipmi message structure.
-+ */
-+static void ipmisensors_send_message(struct ipmisensors_bmc_data *bmc,
-+ long msgid, struct kernel_ipmi_msg *msg)
-+{
-+ if (msg->data == NULL)
-+ printk(KERN_DEBUG "ipmisensors: Send 0x%x\n", msg->cmd);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: Send 0x%x 0x%x 0x%x\n",
-+ msg->cmd, msg->data[0], msg->data[1]);
-+
-+ /* This should be ipmi_request, but Corey had to remove
-+ * that due to it being unused at the moment, as soon as
-+ * this makes it into the kernel we should request it be re-instated.
-+ */
-+ ipmi_request_settime(bmc->user, &bmc->address, msgid, msg, bmc, 0,
-+ -1, 0);
-+}
-+
-+/**
-+ * Compose and send a "reserve SDR" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static void ipmisensors_reserve_sdr(struct ipmisensors_bmc_data *bmc)
-+{
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_RESERVE_SDR;
-+ bmc->tx_message.data_len = 0;
-+ bmc->tx_message.data = NULL;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Componse and send a "get SDR" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @res_id:
-+ * @record:
-+ * @offset:
-+ */
-+static void ipmisensors_get_sdr(struct ipmisensors_bmc_data *bmc, u16 res_id,
-+ u16 record, u8 offset)
-+{
-+ printk(KERN_DEBUG "ipmisensors: Get SDR 0x%x 0x%x 0x%x\n",
-+ res_id, record, offset);
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_GET_SDR;
-+ bmc->tx_message.data_len = 6;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = res_id & 0xff;
-+ bmc->tx_msg_data[1] = res_id >> 8;
-+ bmc->tx_msg_data[2] = record & 0xff;
-+ bmc->tx_msg_data[3] = record >> 8;
-+ bmc->tx_msg_data[4] = offset;
-+ bmc->tx_msg_data[5] = bmc->ipmi_sdr_partial_size;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Compose and send a "set sensor threshold" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @id: the ipmi id number of the sensor.
-+ * @value: the new value for the threshold.
-+ * @lim_index: the index in the lim[] array for which this value applies.
-+ */
-+static void ipmisensors_set_sensor_threshold(struct ipmisensors_bmc_data *bmc,
-+ u8 number, int value,
-+ int lim_index)
-+{
-+ int i;
-+
-+ printk(KERN_DEBUG "ipmisensors: Set SDR Threshold %d %d %d\n",
-+ number, value, lim_index);
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_SET_SENSOR_THRESHOLD;
-+ bmc->tx_message.data_len = 8;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = number & 0xff;
-+ bmc->tx_msg_data[1] = 0x01 << lim_index;
-+
-+ if (lim_index > 5 || lim_index < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Error - ipmisensors_set_sensor_threshold given invalid lim_index\n");
-+ return;
-+ }
-+
-+ for (i = 2; i < 8; i++)
-+ bmc->tx_msg_data[i] = 0x00;
-+
-+ bmc->tx_msg_data[lim_index] = value && 0xff;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Compose and send a "get sensor reading" message for the given sdr.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @sdr: the sdr of the sensor to get the reading for.
-+ */
-+static void ipmisensors_get_reading(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr)
-+{
-+ bmc->tx_message.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
-+ bmc->tx_message.cmd = IPMI_GET_SENSOR_STATE_READING;
-+ bmc->tx_message.data_len = 1;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = sdr->number;
-+ bmc->current_sdr = sdr;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+ down_interruptible(&bmc->update_semaphore);
-+}
-+
-+/****** IPMI Message Receiving ******/
-+
-+/**
-+ * Process an sensor reading response message.
-+ *
-+ * @bmc: the bmc the message is from
-+ * @msg: the IPMI SDR response message
-+ */
-+static void ipmisensors_rcv_reading_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ struct sdrdata *sdr = bmc->current_sdr;
-+
-+ if (sdr == NULL) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error ipmisensors_rcv_reading with NULL sdr\n");
-+ return;
-+ }
-+
-+ sdr->reading = msg->data[1];
-+ sdr->status = msg->data[2];
-+ sdr->thresholds = msg->data[3];
-+
-+ printk(KERN_DEBUG "ipmisensors: sensor %d (type %d) reading %d\n",
-+ sdr->number, sdr->stype, msg->data[1]);
-+
-+ up(&bmc->update_semaphore);
-+}
-+
-+/**
-+ * Unpack based on string type, convert to normal, null terminate.
-+ */
-+static void ipmisensors_sprintf(u8 * to, u8 * from, u8 type, u8 length)
-+{
-+ static const u8 *bcdplus = "0123456789 -.:,_";
-+ int i;
-+
-+ switch (type) {
-+ case 0: /* unicode */
-+ for (i = 0; i < length; i++)
-+ *to++ = (*from++ & 0x7f);
-+ *to = 0;
-+ break;
-+ case 1: /* BCD Plus */
-+ for (i = 0; i < length; i++)
-+ *to++ = bcdplus[*from++ & 0x0f];
-+ *to = 0;
-+ break;
-+ case 2: /* packed ascii *//* if not a mult. of 3 this will run over */
-+ for (i = 0; i < length; i += 3) {
-+ *to++ = *from & 0x3f;
-+ *to++ = *from >> 6 | ((*(from+1) & 0xf) << 2);
-+ from++;
-+ *to++ = *from >> 4 | ((*(from+1) & 0x3) << 4);
-+ from++;
-+ *to++ = (*from++ >> 2) & 0x3f;
-+ }
-+ *to = 0;
-+ break;
-+ case 3: /* normal */
-+ if (length > 1)
-+ memcpy(to, from, length);
-+ to[length] = 0;
-+ break;
-+ }
-+}
-+
-+/* IPMI V1.5 Section 30 */
-+static const int exps[] =
-+ { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 };
-+
-+/* Return 0 for fan, 2 for temp, 3 for voltage
-+ We could make it variable based on the accuracy (= log10(m * 10**k2));
-+ this would work for /proc output, however libsensors resolution
-+ is statically set in lib/chips.c */
-+static int decplaces(struct sdrdata *sd)
-+{
-+ switch (sd->stype) {
-+ case STYPE_TEMP:
-+ return 2;
-+ case STYPE_CURR:
-+ case STYPE_VOLT:
-+ return 3;
-+ case STYPE_FAN:
-+ default:
-+ return 0;
-+ }
-+}
-+
-+/* convert a raw value to a reading. IMPI V1.5 Section 30 */
-+static long conv_val(int value, struct sdrdata *sd)
-+{
-+ u8 k1, k2;
-+ long r;
-+
-+ r = value * sd->m;
-+ k1 = sd->k & 0x0f;
-+ k2 = sd->k >> 4;
-+ if (k1 < 8)
-+ r += sd->b * exps[k1];
-+ else
-+ r += sd->b / exps[16 - k1];
-+ r *= exps[decplaces(sd)];
-+ if (k2 < 8) {
-+ if (sd->linear != 7)
-+ r *= exps[k2];
-+ else
-+ /* this will always truncate to 0: r = 1 / (exps[k2] * r); */
-+ r = 0;
-+ } else {
-+ if (sd->linear != 7)
-+ r /= exps[16 - k2];
-+ else {
-+ if (r != 0)
-+ /* 1 / x * 10 ** (-m) == 10 ** m / x */
-+ r = exps[16 - k2] / r;
-+ else
-+ r = 0;
-+ }
-+ }
-+
-+ return r;
-+}
-+
-+static const char *threshold_text[] = {
-+ "upper non-recoverable threshold",
-+ "upper critical threshold",
-+ "upper non-critical threshold",
-+ "lower non-recoverable threshold",
-+ "lower critical threshold",
-+ "lower non-critical threshold",
-+ "positive-going hysteresis",
-+ "negative-going hysteresis" /* unused */
-+};
-+
-+/* select two out of the 8 possible readable thresholds, and place indexes into the limits
-+ array into lim1 and lim2. Set writable flags */
-+static void ipmisensors_select_thresholds(struct sdrdata *sd)
-+{
-+ u8 capab = sd->capab;
-+ u16 mask = sd->thresh_mask;
-+ int tmp;
-+
-+ sd->lim1 = -1;
-+ sd->lim2 = -1;
-+ sd->lim1_write = 0;
-+ sd->lim2_write = 0;
-+
-+ if (((capab & 0x0c) == 0x04) || /* readable thresholds ? */
-+ ((capab & 0x0c) == 0x08)) {
-+ /* select upper threshold */
-+ if (mask & 0x10) { /* upper crit */
-+ sd->lim1 = 1;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x1000))
-+ sd->lim1_write = 1;
-+ } else if (mask & 0x20) { /* upper non-recov */
-+ sd->lim1 = 0;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x2000))
-+ sd->lim1_write = 1;
-+ } else if (mask & 0x08) { /* upper non-crit */
-+ sd->lim1 = 2;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0800))
-+ sd->lim1_write = 1;
-+ }
-+
-+ /* select lower threshold */
-+ if ((((capab & 0x30) == 0x10) || /* readable ? */
-+ ((capab & 0x30) == 0x20)) && /* pos hyst */
-+ sd->stype == STYPE_TEMP)
-+ sd->lim2 = 6;
-+ else if (mask & 0x02) { /* lower crit */
-+ sd->lim2 = 4;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0200))
-+ sd->lim2_write = 1;
-+ } else if (mask & 0x04) { /* lower non-recov */
-+ sd->lim2 = 3;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0400))
-+ sd->lim2_write = 1;
-+ } else if (mask & 0x01) { /* lower non-crit */
-+ sd->lim2 = 5;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0100))
-+ sd->lim2_write = 1;
-+ }
-+ }
-+
-+ /* swap lim1/lim2 if m < 0 or function is 1/x (but not both!) */
-+ if ((sd->m < 0 && sd->linear != 7) || (sd->m >= 0 && sd->linear == 7)) {
-+ tmp = sd->lim1;
-+ sd->lim1 = sd->lim2;
-+ sd->lim2 = tmp;
-+ }
-+
-+ if (sd->lim1 >= 0)
-+ printk(KERN_INFO "ipmisensors: using %s for upper limit\n",
-+ threshold_text[sd->lim1]);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: no readable upper limit\n");
-+
-+ if (sd->lim2 >= 0)
-+ printk(KERN_INFO "ipmisensors: using %s for lower limit\n",
-+ threshold_text[sd->lim2]);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: no readable lower limit\n");
-+}
-+
-+/************* sysfs callback functions *********/
-+static ssize_t show_update_period(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+
-+ return snprintf(buf, 20, "%d\n", aattr->bmc->update_period);
-+}
-+
-+static ssize_t store_update_period(struct device *dev,
-+ struct device_attribute *attr,
-+ const char *buf, size_t count)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+
-+ aattr->bmc->update_period = simple_strtoul(buf, NULL, 10);;
-+ return count;
-+};
-+
-+static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ return snprintf(buf, 20, "%ld\n",
-+ conv_val(sattr->sdr->reading, sattr->sdr));
-+}
-+
-+static ssize_t show_sensor_max(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ long max = 0;
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ if (sattr->sdr->lim1 >= 0)
-+ max = conv_val(sattr->sdr->limits[sattr->sdr->lim1],
-+ sattr->sdr);
-+ return snprintf(buf, 20, "%ld\n", max);
-+}
-+
-+static ssize_t show_sensor_min(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ long min = 0;
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ if (sattr->sdr->lim2 >= 0)
-+ min = conv_val(sattr->sdr->limits[sattr->sdr->lim2],
-+ sattr->sdr);
-+ return snprintf(buf, 20, "%ld\n", min);
-+};
-+
-+static ssize_t show_sensor_label(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ u8 label[SDR_MAX_UNPACKED_ID_LENGTH];
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ ipmisensors_sprintf(label, sattr->sdr->id, sattr->sdr->string_type,
-+ sattr->sdr->id_length);
-+ return snprintf(buf, 20, "%s\n", label);
-+};
-+
-+static ssize_t store_sensor_max(struct device *dev,
-+ struct device_attribute *attr, const char *buf,
-+ size_t count)
-+{
-+ long val = simple_strtoul(buf, NULL, 10);
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ printk(KERN_DEBUG "ipmisensors: set max on sensor #%d to %ld",
-+ sattr->sdr->number, val);
-+ ipmisensors_set_sensor_threshold(sattr->sdr->bmc, sattr->sdr->number,
-+ val, sattr->sdr->lim1);
-+ return count;
-+};
-+
-+static ssize_t store_sensor_min(struct device *dev,
-+ struct device_attribute *attr, const char *buf,
-+ size_t count)
-+{
-+ long val = simple_strtoul(buf, NULL, 10);
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ printk(KERN_DEBUG "ipmisensors: set min on sensor #%d to %ld",
-+ sattr->sdr->number, val);
-+ ipmisensors_set_sensor_threshold(sattr->sdr->bmc, sattr->sdr->number,
-+ val, sattr->sdr->lim2);
-+ return count;
-+};
-+
-+static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+ return snprintf(buf, 20, "%d\n", aattr->bmc->alarms);
-+};
-+
-+static ssize_t show_name(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ return snprintf(buf, 20, "%s\n", driver_data.driver_name);
-+};
-+
-+/* work function to build the sysfs entries using the ipmi sdrs */
-+static void ipmisensors_build_sysfs(struct work_struct *work)
-+{
-+ int temps = 0, volts = 0, currs = 0, fans = 0;
-+ struct sdrdata *cursor, *next;
-+ struct ipmisensors_bmc_data *bmc = container_of(work, struct ipmisensors_bmc_data, sysfs_work);
-+
-+ /* find and create entries for each sdr data struct */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ u8 id[SDR_MAX_UNPACKED_ID_LENGTH];
-+
-+ cursor->attr_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+ cursor->attr_max_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+ cursor->attr_min_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+
-+ if (cursor->id_length > 0) {
-+ cursor->attr_label_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+
-+ if (cursor->attr_label_name == NULL) {
-+ printk(KERN_INFO
-+ "ipmisensors: Out of memory (kmalloc failed)");
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ return;
-+ }
-+ }
-+
-+ if (cursor->attr_name == NULL || cursor->attr_max_name == NULL
-+ || cursor->attr_min_name == NULL
-+ || cursor->attr_label_name == NULL) {
-+ printk(KERN_INFO
-+ "ipmisensors: Out of memory (kmalloc failed)");
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+ return;
-+ }
-+
-+ switch (cursor->stype) {
-+ case (STYPE_TEMP):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "temp%d_input", ++temps);
-+ /* create min, max attributes */
-+ snprintf(cursor->attr_max_name, MAX_FILENAME_LENGTH,
-+ "temp%d_max", temps);
-+ snprintf(cursor->attr_min_name, MAX_FILENAME_LENGTH,
-+ "temp%d_min", temps);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "temp%d_label", temps);
-+ break;
-+ case (STYPE_VOLT):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "in%d_input", ++volts);
-+ /* create min, max attributes */
-+ snprintf(cursor->attr_max_name, MAX_FILENAME_LENGTH,
-+ "in%d_max", volts);
-+ snprintf(cursor->attr_min_name, MAX_FILENAME_LENGTH,
-+ "in%d_min", volts);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "in%d_label", volts);
-+ break;
-+ case (STYPE_CURR):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "curr%d_input", ++currs);
-+ /* create min, max attributes */
-+ sprintf(cursor->attr_max_name, "curr%d_max", currs);
-+ sprintf(cursor->attr_min_name, "curr%d_min", currs);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "curr%d_label", currs);
-+ break;
-+ case (STYPE_FAN):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "fan%d_input", ++fans);
-+ /* create min, max attributes */
-+ sprintf(cursor->attr_max_name, "fan%d_max", fans);
-+ sprintf(cursor->attr_min_name, "fan%d_min", fans);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "fan%d_label", fans);
-+ break;
-+ default:
-+ printk(KERN_INFO "ipmisensors: unkown sensor type\n");
-+ continue;
-+ }
-+
-+ cursor->attr.dev_attr.attr.name = cursor->attr_name;
-+ cursor->attr.dev_attr.attr.mode = S_IRUGO;
-+ cursor->attr.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr.dev_attr.show = show_sensor;
-+ cursor->attr.dev_attr.store = NULL;
-+ cursor->attr.sdr = cursor;
-+
-+ cursor->attr_min.dev_attr.attr.name = cursor->attr_min_name;
-+ cursor->attr_min.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_min.dev_attr.show = show_sensor_min;
-+ cursor->attr_min.sdr = cursor;
-+
-+ if (cursor->lim2_write) {
-+ printk(KERN_INFO
-+ "ipmisensors: You have a writable sensor threshold! Send me an e-mail at <yani.ioannou@gmail.com>.\n");
-+ cursor->attr_min.dev_attr.store = store_sensor_min;
-+ cursor->attr_min.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ } else {
-+ cursor->attr_min.dev_attr.store = NULL;
-+ cursor->attr_min.dev_attr.attr.mode = S_IRUGO;
-+ }
-+
-+ cursor->attr_max.dev_attr.attr.name = cursor->attr_max_name;
-+ cursor->attr_max.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_max.dev_attr.show = show_sensor_max;
-+ cursor->attr_max.sdr = cursor;
-+
-+ if (cursor->lim1_write) {
-+ printk(KERN_INFO
-+ "ipmisensors: You have a writable sensor threshold! Send me an e-mail at <yani.ioannou@gmail.com>.\n");
-+ cursor->attr_max.dev_attr.store = store_sensor_max;
-+ cursor->attr_max.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ } else {
-+ cursor->attr_max.dev_attr.store = NULL;
-+ cursor->attr_max.dev_attr.attr.mode = S_IRUGO;
-+ }
-+
-+ if (cursor->id_length > 0) {
-+ cursor->attr_label.dev_attr.attr.name =
-+ cursor->attr_label_name;
-+ cursor->attr_label.dev_attr.attr.mode = S_IRUGO;
-+ cursor->attr_label.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_label.dev_attr.show = show_sensor_label;
-+ cursor->attr_label.dev_attr.store = NULL;
-+ cursor->attr_label.sdr = cursor;
-+ }
-+
-+ printk(KERN_INFO
-+ "ipmisensors: registering sensor %d: (type 0x%.2x) "
-+ "(fmt=%d; m=%d; b=%d; k1=%d; k2=%d; cap=0x%.2x; mask=0x%.4x)\n",
-+ cursor->number, cursor->stype, cursor->format, cursor->m,
-+ cursor->b, cursor->k & 0xf, cursor->k >> 4,
-+ cursor->capab, cursor->thresh_mask);
-+
-+ if (cursor->id_length > 0) {
-+ ipmisensors_sprintf(id, cursor->id, cursor->string_type,
-+ cursor->id_length);
-+ switch (cursor->stype) {
-+ case (STYPE_TEMP):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label temp%d \"%s\"\n",
-+ temps, id);
-+ break;
-+ case (STYPE_VOLT):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label in%d \"%s\"\n",
-+ volts, id);
-+ break;
-+ case (STYPE_CURR):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label curr%d \"%s\"\n",
-+ currs, id);
-+ break;
-+ case (STYPE_FAN):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label fan%d \"%s\"\n",
-+ fans, id);
-+ break;
-+ }
-+ }
-+
-+ ipmisensors_select_thresholds(cursor);
-+
-+ if (cursor->linear != 0 && cursor->linear != 7) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: nonlinear function 0x%.2x unsupported, expect bad results\n",
-+ cursor->number, cursor->linear);
-+ }
-+
-+ if ((cursor->format & 0x03) == 0x02) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: 1's complement format unsupported, expect bad results\n",
-+ cursor->number);
-+ } else if ((cursor->format & 0x03) == 0x03) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: threshold sensor only, no readings available",
-+ cursor->number);
-+ }
-+
-+ if (cursor->lim1_write || cursor->lim2_write)
-+ cursor->attr.dev_attr.attr.mode = 0644;
-+ else
-+ cursor->attr.dev_attr.attr.mode = 0444;
-+
-+ if (device_create_file(bmc->dev, &cursor->attr.dev_attr) < 0
-+ || device_create_file(bmc->dev,
-+ &cursor->attr_min.dev_attr) < 0
-+ || device_create_file(bmc->dev,
-+ &cursor->attr_max.dev_attr) < 0
-+ || (cursor->id_length >
-+ 0 ? device_create_file(bmc->dev,
-+ &cursor->attr_label.dev_attr) <
-+ 0 : 0)
-+ ) {
-+ printk(KERN_INFO
-+ "ipmisensors: sysfs file creation failed for SDR %d (%s).\n",
-+ cursor->number, cursor->id);
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+ return;
-+ }
-+ }
-+
-+ bmc->alarms_attr.dev_attr.attr.name = "alarms";
-+ bmc->alarms_attr.dev_attr.attr.mode = S_IRUGO;
-+ bmc->alarms_attr.dev_attr.attr.owner = THIS_MODULE;
-+ bmc->alarms_attr.dev_attr.show = show_alarms;
-+ bmc->alarms_attr.dev_attr.store = NULL;
-+ bmc->alarms_attr.bmc = bmc;
-+
-+ if (device_create_file(bmc->dev, &bmc->alarms_attr.dev_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'alarms'");
-+ return;
-+ }
-+
-+ bmc->name_attr.attr.name = "name";
-+ bmc->name_attr.attr.mode = S_IRUGO;
-+ bmc->name_attr.attr.owner = THIS_MODULE;
-+ bmc->name_attr.show = show_name;
-+
-+ if (device_create_file(bmc->dev, &bmc->name_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'name'");
-+ return;
-+ }
-+
-+ bmc->update_attr.dev_attr.attr.name = "update_period";
-+ bmc->update_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ bmc->update_attr.dev_attr.attr.owner = THIS_MODULE;
-+ bmc->update_attr.dev_attr.show = show_update_period;
-+ bmc->update_attr.dev_attr.store = store_update_period;
-+ bmc->update_attr.bmc = bmc;
-+
-+ if (device_create_file(bmc->dev, &bmc->update_attr.dev_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'update_period'");
-+ return;
-+ }
-+
-+ printk(KERN_INFO
-+ "ipmisensors: registered %d temp, %d volt, %d current, %d fan sensors\n",
-+ temps, volts, currs, fans);
-+
-+ /* This completes the initialization. We can now kickoff the
-+ * periodic update of the bmc sensor's values by scheduling
-+ * the first work.
-+ */
-+ queue_work(ipmisensors_workqueue, &bmc->update_work.work);
-+
-+}
-+
-+/**
-+ * Process an SDR response message, save the SDRs we like in the sdr
-+ * list for the given BMC.
-+ *
-+ * @bmc: the bmc the message is from
-+ * @msg: the IPMI SDR response message
-+ */
-+static void ipmisensors_rcv_sdr_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ u16 record;
-+ int type;
-+ int stype;
-+ int id_length;
-+ int i;
-+ int ipmi_ver = 0;
-+ unsigned char *data;
-+ u8 id[SDR_MAX_UNPACKED_ID_LENGTH];
-+ struct sdrdata *sdr;
-+
-+ if (msg->data[0] != 0) {
-+ /* cut request in half and try again */
-+ bmc->ipmi_sdr_partial_size /= 2;
-+ if (bmc->ipmi_sdr_partial_size < 8) {
-+ printk(KERN_INFO
-+ "ipmisensors: IPMI buffers too small, giving up\n");
-+ bmc->state = STATE_DONE;
-+ return;
-+ }
-+ printk(KERN_DEBUG
-+ "ipmisensors: Reducing SDR request size to %d\n",
-+ bmc->ipmi_sdr_partial_size);
-+
-+ ipmisensors_get_sdr(bmc, 0, 0, 0);
-+ bmc->state = STATE_SDR;
-+ return;
-+ }
-+ if (bmc->ipmi_sdr_partial_size < IPMI_SDR_SIZE) {
-+ if (bmc->rx_msg_data_offset == 0) {
-+ memcpy(bmc->rx_msg_data, msg->data,
-+ bmc->ipmi_sdr_partial_size + 3);
-+ bmc->rx_msg_data_offset =
-+ bmc->ipmi_sdr_partial_size + 3;
-+ } else {
-+ memcpy(bmc->rx_msg_data + bmc->rx_msg_data_offset,
-+ msg->data + 3, bmc->ipmi_sdr_partial_size);
-+ bmc->rx_msg_data_offset += bmc->ipmi_sdr_partial_size;
-+ }
-+ if (bmc->rx_msg_data_offset > bmc->rx_msg_data[7] + 7) {
-+ /* got last chunk */
-+ bmc->rx_msg_data_offset = 0;
-+ data = bmc->rx_msg_data;
-+ } else {
-+ /* get more */
-+ record =
-+ (bmc->rx_msg_data[4] << 8) | bmc->rx_msg_data[3];
-+ ipmisensors_get_sdr(bmc, bmc->resid, record,
-+ bmc->rx_msg_data_offset - 3);
-+ bmc->state = STATE_SDR;
-+ return;
-+ }
-+ } else {
-+ /* got it in one chunk */
-+ data = msg->data;
-+ }
-+
-+ bmc->nextrecord = (data[2] << 8) | data[1];
-+
-+ /* If the ipmi version is 0.9 we have to remap some things.
-+ * Yes this is very ugly, but we aren't the ones who
-+ * implemented an incomplete spec!
-+ */
-+ ipmi_ver = data[5];
-+
-+ type = data[6];
-+ /* known SDR type */
-+ if (type == 1 || type == 2) {
-+ stype = data[(ipmi_ver == 0x90 ? 16 : 15)];
-+ /* known sensor type */
-+ if (stype <= STYPE_MAX) {
-+ if (data[(ipmi_ver == 0x90 ? 17 : 16)] != 0x01) {
-+ if (type == 1)
-+ ipmisensors_sprintf(id, &data[51],
-+ data[50] >> 6,
-+ data[50] & 0x1f);
-+ else
-+ ipmisensors_sprintf(id,
-+ &data[(ipmi_ver ==
-+ 0x90 ? 30 :
-+ 35)],
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 :
-+ 34)] >> 6,
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 :
-+ 34)] & 0x1f);
-+ printk(KERN_INFO
-+ "ipmisensors: skipping non-threshold sensor \"%s\"\n",
-+ id);
-+ } else {
-+ /* add entry to sdrd table */
-+ sdr = ipmisensors_new_sdr();
-+ if (!sdr) {
-+ printk(KERN_ERR
-+ "ipmisensors: could not allocate memory for new SDR");
-+ return;
-+ }
-+ sdr->bmc = bmc;
-+ sdr->stype = stype;
-+ sdr->number = data[10];
-+ sdr->capab = data[(ipmi_ver == 0x90 ? 15 : 14)];
-+ sdr->thresh_mask =
-+ (((u16) data[(ipmi_ver == 0x90 ? 21 : 22)])
-+ << 8) | data[21];
-+ if (type == 1) {
-+ sdr->format =
-+ data[(ipmi_ver ==
-+ 0x90 ? 22 : 24)] >> 6;
-+ sdr->linear =
-+ data[(ipmi_ver ==
-+ 0x90 ? 25 : 26)] & 0x7f;
-+ sdr->m =
-+ data[(ipmi_ver == 0x90 ? 26 : 27)];
-+ sdr->m |= ((u16)
-+ (data
-+ [(ipmi_ver ==
-+ 0x90 ? 27 : 28)]
-+ & 0xc0)) << 2;
-+ if (sdr->m & 0x0200) {
-+ /* sign extend */
-+ sdr->m |= 0xfc00;
-+ }
-+ sdr->b =
-+ data[(ipmi_ver == 0x90 ? 28 : 29)];
-+ sdr->b |= ((u16)
-+ (data
-+ [(ipmi_ver ==
-+ 0x90 ? 29 : 30)]
-+ & 0xc0)) << 2;
-+ if (sdr->b & 0x0200) {
-+ /* sign extend */
-+ sdr->b |= 0xfc00;
-+ }
-+ sdr->k =
-+ data[(ipmi_ver == 0x90 ? 31 : 32)];
-+ sdr->nominal =
-+ data[(ipmi_ver == 0x90 ? 33 : 34)];
-+ for (i = 0; i < SDR_LIMITS; i++) {
-+ /* assume readable */
-+ sdr->limits[i] =
-+ data[(ipmi_ver ==
-+ 0x90 ? 40 : 39) + i];
-+ }
-+ sdr->string_type = data[50] >> 6;
-+ id_length = data[50] & 0x1f;
-+ memcpy(sdr->id, &data[51], id_length);
-+ sdr->id_length = id_length;
-+ } else {
-+ sdr->m = 1;
-+ sdr->b = 0;
-+ sdr->k = 0;
-+ sdr->string_type =
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 : 34)] >> 6;
-+ id_length = data[34] & 0x1f;
-+ if (id_length > 0) {
-+ memcpy(sdr->id,
-+ &data[(ipmi_ver ==
-+ 0x90 ? 30 : 35)],
-+ id_length);
-+ }
-+ sdr->id_length = id_length;
-+ /* limits?? */
-+ if (ipmi_ver == 0x90) {
-+ memcpy(sdr->id,
-+ &data[30], id_length);
-+ sdr->id_length = id_length;
-+ }
-+ }
-+ ipmisensors_add_sdr(bmc, sdr);
-+ }
-+ }
-+ /* peek at the other SDR types */
-+ } else if (type == 0x10 || type == 0x11 || type == 0x12) {
-+ ipmisensors_sprintf(id, data + 19, data[18] >> 6,
-+ data[18] & 0x1f);
-+ if (type == 0x10) {
-+ printk(KERN_INFO
-+ "ipmisensors: Generic Device acc=0x%x; slv=0x%x; lun=0x%x; type=0x%x; \"%s\"\n",
-+ data[8], data[9], data[10], data[13], id);
-+ } else if (type == 0x11) {
-+ printk(KERN_INFO
-+ "ipmisensors: FRU Device acc=0x%x; slv=0x%x; log=0x%x; ch=0x%x; type=0x%x; \"%s\"\n",
-+ data[8], data[9], data[10], data[11], data[13],
-+ id);
-+ } else {
-+ printk(KERN_INFO
-+ "ipmisensors: Mgmt Ctllr Device slv=0x%x; \"%s\"\n",
-+ data[8], id);
-+ }
-+ } else if (type == 0x14) {
-+ printk(KERN_INFO
-+ "ipmisensors: Message Channel Info Records:\n");
-+ for (i = 0; i < 8; i++) {
-+ printk(KERN_INFO "ipmisensors: Channel %d info 0x%x\n",
-+ i, data[9 + i]);
-+ }
-+ } else {
-+ printk(KERN_INFO "ipmisensors: Skipping SDR type 0x%x\n", type);
-+ }
-+ if (ipmi_ver != 0x90) {
-+ if (bmc->nextrecord >= 6224) {
-+ /*YJ stop sensor scan on poweredge 1750 */
-+ bmc->nextrecord = 0xffff;
-+ }
-+ }
-+
-+ if (bmc->nextrecord == 0xFFFF) {
-+ if (bmc->sdr_count == 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: No recognized sensors found.\n");
-+ bmc->state = STATE_DONE;
-+ } else {
-+ printk(KERN_INFO "ipmisensors: all sensors detected\n");
-+ bmc->state = STATE_SYSTABLE;
-+
-+ /* Schedule sysfs build/registration work */
-+ INIT_WORK(&bmc->sysfs_work, ipmisensors_build_sysfs);
-+ queue_work(ipmisensors_workqueue, &bmc->sysfs_work);
-+ }
-+ } else {
-+ ipmisensors_get_sdr(bmc, 0, bmc->nextrecord, 0);
-+ bmc->state = STATE_SDR;
-+ }
-+}
-+
-+/**
-+ * Process incoming messages based on internal state
-+ *
-+ * @bmc: the bmc the message is from.
-+ * @msg: the ipmi message to process.
-+ */
-+static void ipmisensors_rcv_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ switch (bmc->state) {
-+ case STATE_INIT:
-+ case STATE_RESERVE:
-+ bmc->resid = (((u16) msg->data[2]) << 8) | msg->data[1];
-+
-+ printk(KERN_DEBUG "ipmisensors: Got first resid 0x%.4x\n",
-+ bmc->resid);
-+
-+ ipmisensors_get_sdr(bmc, 0, 0, 0);
-+ bmc->state = STATE_SDR;
-+ break;
-+
-+ case STATE_SDR:
-+ case STATE_SDRPARTIAL:
-+ ipmisensors_rcv_sdr_msg(bmc, msg);
-+ break;
-+
-+ case STATE_READING:
-+ ipmisensors_rcv_reading_msg(bmc, msg);
-+ break;
-+
-+ case STATE_UNCANCEL:
-+ bmc->resid = (((u16) msg->data[2]) << 8) | msg->data[1];
-+
-+ printk(KERN_DEBUG "ipmisensors: Got new resid 0x%.4x\n",
-+ bmc->resid);
-+
-+ bmc->rx_msg_data_offset = 0;
-+ ipmisensors_get_sdr(bmc, 0, bmc->nextrecord, 0);
-+ bmc->state = STATE_SDR;
-+ break;
-+
-+ case STATE_DONE:
-+ case STATE_SYSTABLE:
-+ break;
-+ default:
-+ bmc->state = STATE_INIT;
-+ }
-+}
-+
-+/**
-+ * Callback to handle a received IPMI message from a given BMC.
-+ *
-+ * @msg: the received message.
-+ * @handler_data: a pointer to the particular bmc ipmisensors_bmc_data struct.
-+ */
-+static void ipmisensors_msg_handler(struct ipmi_recv_msg *msg,
-+ void *user_msg_data)
-+{
-+ struct ipmisensors_bmc_data *bmc =
-+ (struct ipmisensors_bmc_data *)user_msg_data;
-+
-+ if (msg->msg.data[0] != 0)
-+ printk(KERN_WARNING
-+ "ipmisensors: Error 0x%x on cmd 0x%x/0x%x\n",
-+ msg->msg.data[0], msg->msg.netfn, msg->msg.cmd);
-+
-+ if (bmc != NULL && ipmisensors_intf_registered(bmc->interface_id)) {
-+ if (bmc->state == STATE_SDR &&
-+ msg->msg.data[0] == IPMI_INVALID_RESERVATION_ID) {
-+ /* reservation cancelled, get new resid */
-+ if (++bmc->errorcount > 275) {
-+ printk(KERN_ERR
-+ "ipmisensors: Too many reservations cancelled, giving up\n");
-+ bmc->state = STATE_DONE;
-+ } else {
-+ printk(KERN_DEBUG
-+ "ipmisensors: resid 0x%04x cancelled, getting new one\n",
-+ bmc->resid);
-+
-+ ipmisensors_reserve_sdr(bmc);
-+ bmc->state = STATE_UNCANCEL;
-+ }
-+ } else if (msg->msg.data[0] != IPMI_CC_NO_ERROR &&
-+ msg->msg.data[0] != IPMI_ERR_RETURNING_REQ_BYTES &&
-+ msg->msg.data[0] != IPMI_ERR_PROVIDING_RESPONSE) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error 0x%x on cmd 0x%x/0x%x; state = %d; probably fatal.\n",
-+ msg->msg.data[0], msg->msg.netfn & 0xfe,
-+ msg->msg.cmd, bmc->state);
-+ } else {
-+ printk(KERN_DEBUG "ipmisensors: received message\n");
-+ ipmisensors_rcv_msg(bmc, &msg->msg);
-+ }
-+
-+ } else {
-+ printk(KERN_WARNING
-+ "ipmisensors: Response for non-registered BMC\n");
-+ if (bmc != NULL)
-+ printk(KERN_DEBUG "ipmisensors: BMC ID: %d\n",
-+ bmc->interface_id);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: BMC NULL!\n");
-+ }
-+
-+ ipmi_free_recv_msg(msg);
-+}
-+
-+/****** IPMI Interface Initialization ******/
-+
-+/**
-+ * Return true if the given ipmi interface has been registered.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static int ipmisensors_intf_registered(int ipmi_intf)
-+{
-+ int found = 0;
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->interface_id == ipmi_intf) {
-+ found++;
-+ }
-+ }
-+
-+ return found;
-+}
-+
-+/**
-+ * Return true if the given BMC has been registered.
-+ *
-+ * @bmc: The BMC device.
-+ */
-+static int ipmisensors_bmc_registered(struct device *bmc)
-+{
-+ int found = 0;
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->dev == bmc) {
-+ found++;
-+ }
-+ }
-+
-+ return found;
-+}
-+
-+/**
-+ * Register new IPMI BMC interface. Interface indpendent callback created
-+ * for flexibility in adding new types of interface callbacks in future.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static void ipmisensors_register_bmc(int ipmi_intf, struct ipmi_addr *address)
-+{
-+ int error;
-+
-+ /* allocate a new ipmisensors_bmc_data struct */
-+
-+ struct ipmisensors_bmc_data *bmc = (struct ipmisensors_bmc_data *)
-+ kmalloc(sizeof(struct ipmisensors_bmc_data), GFP_KERNEL);
-+
-+ /* initialize members */
-+ INIT_LIST_HEAD(&bmc->sdrs);
-+ bmc->interface_id = ipmi_intf;
-+
-+ bmc->address = *address;
-+
-+ bmc->sdr_count = 0;
-+ bmc->msgid = 0;
-+ bmc->ipmi_sdr_partial_size = IPMI_CHUNK_SIZE;
-+ bmc->state = STATE_INIT;
-+ bmc->errorcount = 0;
-+ bmc->rx_msg_data_offset = 0;
-+ bmc->dev = ipmi_get_bmcdevice(ipmi_intf);
-+
-+ /* default to 3 second min update interval */
-+ bmc->update_period = 3;
-+
-+ if (bmc->dev == NULL) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, couldn't get BMC device for interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Create IPMI messaging interface user */
-+ error = ipmi_create_user(bmc->interface_id, &driver_data.ipmi_hndlrs,
-+ bmc, &bmc->user);
-+ if (error < 0) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, unable to register user with ipmi interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Register the BMC as a HWMON class device */
-+ bmc->class_dev = hwmon_device_register(bmc->dev);
-+
-+ if (IS_ERR(bmc->class_dev)) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, unable to register hwmon class device for interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Register the BMC in the driver */
-+ if (ipmisensors_bmc_registered(bmc->dev)) {
-+ printk(KERN_ERR
-+ "ipmisensors: BMC on interface %d already registered\n",
-+ bmc->interface_id);
-+ hwmon_device_unregister(bmc->class_dev);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ ipmi_get_version(bmc->user, &bmc->ipmi_version_major,
-+ &bmc->ipmi_version_minor);
-+
-+ /* finally add the new bmc data to the bmc data list */
-+ list_add_tail(&bmc->list, &driver_data.bmc_data);
-+ driver_data.interfaces++;
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Registered IPMI %d.%d BMC over interface %d\n",
-+ bmc->ipmi_version_major,
-+ bmc->ipmi_version_minor, bmc->interface_id);
-+
-+ /* Send a reserve SDR command to the bmc */
-+ ipmisensors_reserve_sdr(bmc);
-+
-+ /* initialize the bmc's update work struct */
-+ INIT_DELAYED_WORK(&bmc->update_work, ipmisensors_update_bmc);
-+}
-+
-+/**
-+ * Callback for when an IPMI BMC is gone. Interface indpendent callback created
-+ * for flexibility in adding new types of interface callbacks in future.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static void ipmisensors_unregister_bmc(int ipmi_intf)
-+{
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->interface_id == ipmi_intf) {
-+ list_del(&cursor->list);
-+ printk(KERN_DEBUG
-+ "ipmisensors: cancelling queued work\n");
-+ /* cancel update work queued for this bmc */
-+ cancel_delayed_work(&cursor->update_work);
-+ printk(KERN_DEBUG
-+ "ipmisensors: waiting for update to finish\n");
-+ /* wait for readings to finish */
-+ while (cursor->state != STATE_DONE) ;
-+
-+ device_remove_file(cursor->dev,
-+ &cursor->alarms_attr.dev_attr);
-+ device_remove_file(cursor->dev,
-+ &cursor->update_attr.dev_attr);
-+ hwmon_device_unregister(cursor->class_dev);
-+ ipmisensors_sdr_cleanup(cursor);
-+ ipmi_destroy_user(cursor->user);
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Unegistered IPMI interface %d\n",
-+ cursor->interface_id);
-+
-+ kfree(cursor);
-+ driver_data.interfaces--;
-+ }
-+ }
-+
-+}
-+
-+/**
-+ * Unregister all registered bmcs.
-+ */
-+static void ipmisensors_unregister_bmc_all(void)
-+{
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ list_del(&cursor->list);
-+
-+ /* cancel update work queued for this bmc */
-+ printk(KERN_DEBUG "ipmisensors: cancelling queued work\n");
-+ cancel_delayed_work(&cursor->update_work);
-+
-+ printk(KERN_DEBUG
-+ "ipmisensors: waiting for update to finish\n");
-+ /* wait for readings to finish */
-+ while (cursor->state != STATE_DONE) ;
-+
-+ device_remove_file(cursor->dev, &cursor->alarms_attr.dev_attr);
-+ device_remove_file(cursor->dev, &cursor->update_attr.dev_attr);
-+ hwmon_device_unregister(cursor->class_dev);
-+ ipmisensors_sdr_cleanup(cursor);
-+ ipmi_destroy_user(cursor->user);
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Unegistered IPMI interface %d\n",
-+ cursor->interface_id);
-+
-+ kfree(cursor);
-+ }
-+
-+ driver_data.interfaces = 0;
-+}
-+
-+/**
-+ * Callback for when a new IPMI SMI type interface is found.
-+ *
-+ * @if_num: The IPMI interface number.
-+ */
-+static void ipmisensors_new_smi(int if_num, struct device *dev)
-+{
-+ struct ipmi_addr smi_address = {
-+ IPMI_SYSTEM_INTERFACE_ADDR_TYPE,
-+ IPMI_BMC_CHANNEL,
-+ {0},
-+ };
-+
-+ /* calls the generic new interface function */
-+ ipmisensors_register_bmc(if_num, &smi_address);
-+}
-+
-+/**
-+ * Callback for when an exisiting IPMI SMI type interface is gone.
-+ *
-+ * @if_num: The IPMI interface number.
-+ */
-+static void ipmisensors_smi_gone(int if_num)
-+{
-+ if (driver_data.interfaces > 0) {
-+ ipmisensors_unregister_bmc(if_num);
-+ }
-+}
-+
-+/**
-+ * Initialize the module.
-+ */
-+static int __init ipmisensors_init(void)
-+{
-+ int error;
-+ printk(KERN_INFO "ipmisensors - IPMI BMC sensors interface\n");
-+
-+ /* init cache managers */
-+ driver_data.sdrdata_cache =
-+ kmem_cache_create("ipmisensors_sdrdata", sizeof(struct sdrdata), 0,
-+ 0, NULL, NULL);
-+ driver_data.sysfsattr_cache =
-+ kmem_cache_create("ipmisensors_sysfsattr",
-+ sizeof(struct ipmisensors_device_attribute), 0, 0,
-+ NULL, NULL);
-+
-+ if (!driver_data.sdrdata_cache || !driver_data.sysfsattr_cache) {
-+ if (driver_data.sdrdata_cache)
-+ kmem_cache_destroy(driver_data.sdrdata_cache);
-+ if (driver_data.sysfsattr_cache)
-+ kmem_cache_destroy(driver_data.sysfsattr_cache);
-+ return -ENOMEM;
-+ }
-+
-+ /* register IPMI interface callback(s) */
-+ error = ipmi_smi_watcher_register(&driver_data.smi_watcher);
-+ if (error) {
-+ printk(KERN_WARNING
-+ "ipmisensors: can't register smi watcher\n");
-+ return error;
-+ }
-+
-+ /* create work queue, keep it simple, single-threaded */
-+ ipmisensors_workqueue =
-+ create_singlethread_workqueue("ipmisensors_workqueue");
-+
-+ return 0;
-+}
-+
-+/**
-+ * Cleanup
-+ */
-+static void ipmisensors_cleanup(void)
-+{
-+ /* start cleanup */
-+ cleanup = 1;
-+
-+ /* unregister bmcs */
-+ printk(KERN_DEBUG "ipmisensors: unregister bmcs\n");
-+ ipmi_smi_watcher_unregister(&driver_data.smi_watcher);
-+ ipmisensors_unregister_bmc_all();
-+
-+ /* flush & destroy work queue */
-+ printk(KERN_DEBUG "ipmisensors: destroy workqueue\n");
-+ flush_workqueue(ipmisensors_workqueue);
-+ destroy_workqueue(ipmisensors_workqueue);
-+
-+ /* remove cache managers */
-+ if (driver_data.sdrdata_cache)
-+ kmem_cache_destroy(driver_data.sdrdata_cache);
-+ if (driver_data.sysfsattr_cache)
-+ kmem_cache_destroy(driver_data.sysfsattr_cache);
-+}
-+
-+/**
-+ * Cleanup and exit the module
-+ */
-+static void __exit ipmisensors_exit(void)
-+{
-+ ipmisensors_cleanup();
-+ printk(KERN_DEBUG "ipmisensors: cleanup finished\n");
-+}
-+
-+MODULE_AUTHOR("Yani Ioannou <yani.ioannou@gmail.com>");
-+MODULE_DESCRIPTION("IPMI BMC sensors");
-+MODULE_LICENSE("GPL");
-+
-+module_init(ipmisensors_init);
-+module_exit(ipmisensors_exit);
-diff -rduNp linux-2.6.20.3.orig/drivers/hwmon/ipmisensors.h linux-2.6.20.3/drivers/hwmon/ipmisensors.h
---- linux-2.6.20.3.orig/drivers/hwmon/ipmisensors.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.20.3/drivers/hwmon/ipmisensors.h 2007-03-14 14:41:23.000000000 +0100
-@@ -0,0 +1,240 @@
-+/*
-+ * ipmisensors.h - lm_sensors interface to IPMI sensors.
-+ *
-+ * Copyright (C) 2004-2006 Yani Ioannou <yani.ioannou@gmail.com>
-+ *
-+ * Adapted from bmcsensors (lm-sensors for linux 2.4)
-+ * bmcsensors (C) Mark D. Studebaker <mdsxyz123@yahoo.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ */
-+
-+#include <linux/ipmi.h>
-+#include <linux/list.h>
-+#include <linux/slab.h>
-+#include <linux/workqueue.h>
-+
-+/* SDR defs */
-+#define STYPE_TEMP 0x01
-+#define STYPE_VOLT 0x02
-+#define STYPE_CURR 0x03
-+#define STYPE_FAN 0x04
-+
-+#define SDR_LIMITS 8
-+#define SDR_MAX_ID_LENGTH 16
-+#define SDR_MAX_UNPACKED_ID_LENGTH ((SDR_MAX_ID_LENGTH * 4 / 3) + 2)
-+
-+/* the last sensor type we are interested in */
-+#define STYPE_MAX 4
-+
-+#define IPMI_SDR_SIZE 67
-+#define IPMI_CHUNK_SIZE 16
-+
-+#define MAX_FILENAME_LENGTH 30
-+
-+struct ipmisensors_device_attribute {
-+ struct device_attribute dev_attr;
-+ struct sdrdata *sdr;
-+};
-+#define to_ipmisensors_dev_attr(_dev_attr) \
-+ container_of(_dev_attr, struct ipmisensors_device_attribute, dev_attr)
-+
-+#define IPMISENSORS_DEVICE_ATTR(_name,_mode,_show,_store,_index) \
-+struct ipmisensors_attribute sensor_dev_attr_##_name = { \
-+ .dev_attr = __ATTR(_name,_mode,_show,_store), \
-+ .index = _index, \
-+}
-+
-+struct ipmisensors_bmc_device_attribute {
-+ struct device_attribute dev_attr;
-+ struct ipmisensors_bmc_data *bmc;
-+};
-+#define to_ipmisensors_bmc_dev_attr(_dev_attr) \
-+ container_of(_dev_attr, struct ipmisensors_bmc_device_attribute, dev_attr)
-+
-+/**
-+ * &struct_sdrdata stores the IPMI Sensor Data Record (SDR) data, as recieved from the BMC, along with the corresponding sysfs attributes
-+ */
-+struct sdrdata {
-+ struct list_head list;
-+ /* retrieved from SDR, not expected to change */
-+ /* Sensor Type Code */
-+ u8 stype;
-+ u8 number;
-+ /* Sensor Capability Code */
-+ u8 capab;
-+ u16 thresh_mask;
-+ u8 format;
-+ u8 linear;
-+ s16 m;
-+ s16 b;
-+ u8 k;
-+ u8 nominal;
-+ u8 limits[SDR_LIMITS];
-+ /* index into limits for reported upper and lower limit */
-+ int lim1, lim2;
-+ u8 lim1_write, lim2_write;
-+ u8 string_type;
-+ u8 id_length;
-+ u8 id[SDR_MAX_ID_LENGTH];
-+ /* retrieved from reading */
-+ u8 reading;
-+ u8 status;
-+ u8 thresholds;
-+ /* sensor's bmc */
-+ struct ipmisensors_bmc_data *bmc;
-+ /* sysfs entries */
-+ struct ipmisensors_device_attribute attr;
-+ char *attr_name;
-+ struct ipmisensors_device_attribute attr_min;
-+ char *attr_min_name;
-+ struct ipmisensors_device_attribute attr_max;
-+ char *attr_max_name;
-+ struct ipmisensors_device_attribute attr_label;
-+ char *attr_label_name;
-+
-+};
-+
-+/**
-+ * &struct_ipmisensors_data stores the data for the ipmisensors driver.
-+ */
-+struct ipmisensors_data {
-+ /* Driver struct */
-+ char *driver_name;
-+
-+ /* Linked list of ipmisensors_bmc_data structs, one for each BMC */
-+ struct list_head bmc_data;
-+
-+ /* Number of ipmi interfaces (and hence ipmisensors_data structs). */
-+ int interfaces;
-+
-+ /* IPMI kernel interface - SMI watcher */
-+ struct ipmi_smi_watcher smi_watcher;
-+
-+ /* IPMI kernel interface - user handlers */
-+ struct ipmi_user_hndl ipmi_hndlrs;
-+
-+ /* Cache manager for sdrdata cache */
-+ struct kmem_cache *sdrdata_cache;
-+
-+ /* Cache manager for ipmi_sensor_device_attribute cache */
-+ struct kmem_cache *sysfsattr_cache;
-+};
-+
-+/**
-+ * &states: enumeration of state codes for a bmc specific ipmisensors
-+ */
-+enum states {
-+ STATE_INIT,
-+ STATE_RESERVE,
-+ STATE_SDR,
-+ STATE_SDRPARTIAL,
-+ STATE_READING,
-+ STATE_UNCANCEL,
-+ STATE_SYSTABLE,
-+ STATE_DONE
-+};
-+
-+/**
-+ * &struct_ipmisensors_bmc_data stores the data for a particular IPMI BMC.
-+ */
-+struct ipmisensors_bmc_data {
-+ struct list_head list;
-+
-+ /* The IPMI interface number */
-+ int interface_id;
-+
-+ /* The IPMI address */
-+ struct ipmi_addr address;
-+
-+ /* List of sdrdata structs (sdrs) recieved from the BMC */
-+ struct list_head sdrs;
-+
-+ /* Count of the number of sdrs stored in the sdr list */
-+ int sdr_count;
-+
-+ /* next message id */
-+ int msgid;
-+
-+ /* The ipmi interface 'user' used to access this particular bmc */
-+ ipmi_user_t user;
-+
-+ /* BMC IPMI Version (major) */
-+ unsigned char ipmi_version_major;
-+
-+ /* BMC IPMI Version (minor) */
-+ unsigned char ipmi_version_minor;
-+
-+ /* The size of the SDR request message */
-+ int ipmi_sdr_partial_size;
-+
-+ /* transmit message buffer */
-+ struct kernel_ipmi_msg tx_message;
-+
-+ /* ipmi transmited data buffer */
-+ unsigned char tx_msg_data[IPMI_MAX_MSG_LENGTH + 50]; /* why the +50 in bmcsensors? */
-+
-+ /* ipmi recieved data buffer */
-+ unsigned char rx_msg_data[IPMI_MAX_MSG_LENGTH + 50];
-+
-+ /* current recieve buffer offset */
-+ int rx_msg_data_offset;
-+
-+ /* The id of then next SDR record to read during update cycle */
-+ u16 nextrecord;
-+
-+ /* BMC SDR Reservation ID */
-+ u16 resid;
-+
-+ /* Alarm status */
-+ u8 alarms;
-+
-+ /* The cumalative error count for this bmc */
-+ int errorcount;
-+
-+ /* The current state of this bmc w.r.t. ipmisensors (see enum states) */
-+ int state;
-+
-+ /* The current sdr for which a reading is pending */
-+ struct sdrdata *current_sdr;
-+
-+ /* The BMC's device struct */
-+ struct device *dev;
-+
-+ /* hwmon class device */
-+ struct class_device *class_dev;
-+
-+ /* hwmon device name */
-+ struct device_attribute name_attr;
-+
-+ /* alarms attribute */
-+ struct ipmisensors_bmc_device_attribute alarms_attr;
-+
-+ /* update_period attribute */
-+ struct ipmisensors_bmc_device_attribute update_attr;
-+
-+ /* lower bound on time between updates (in seconds) */
-+ unsigned int update_period;
-+
-+ /* semaphore used to do a headcount of the SDR readings we are waiting
-+ * on in a given bmc update */
-+ struct semaphore update_semaphore;
-+
-+ /* bmc's work struct for updating sensors */
-+ struct delayed_work update_work;
-+
-+ /* bmc's work struct for building the sysfs workqueue */
-+ struct work_struct sysfs_work;
-+};
-diff -rduNp linux-2.6.20.3.orig/include/linux/ipmi.h linux-2.6.20.3/include/linux/ipmi.h
---- linux-2.6.20.3.orig/include/linux/ipmi.h 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/include/linux/ipmi.h 2007-03-14 14:23:02.000000000 +0100
-@@ -300,6 +300,9 @@ int ipmi_create_user(unsigned int
- safe, too. */
- int ipmi_destroy_user(ipmi_user_t user);
-
-+/* Get the IPMI BMC's device struct */
-+struct device *ipmi_get_bmcdevice(int ipmi_intf);
-+
- /* Get the IPMI version of the BMC we are talking to. */
- void ipmi_get_version(ipmi_user_t user,
- unsigned char *major,
-diff -rduNp linux-2.6.20.3.orig/include/linux/ipmi_msgdefs.h linux-2.6.20.3/include/linux/ipmi_msgdefs.h
---- linux-2.6.20.3.orig/include/linux/ipmi_msgdefs.h 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/include/linux/ipmi_msgdefs.h 2007-03-14 14:23:02.000000000 +0100
-@@ -45,6 +45,7 @@
-
- #define IPMI_NETFN_APP_REQUEST 0x06
- #define IPMI_NETFN_APP_RESPONSE 0x07
-+#define IPMI_GET_DEVICE_GUID_CMD 0x08
- #define IPMI_GET_DEVICE_ID_CMD 0x01
- #define IPMI_COLD_RESET_CMD 0x02
- #define IPMI_WARM_RESET_CMD 0x03
-@@ -57,6 +58,11 @@
- #define IPMI_GET_BMC_GLOBAL_ENABLES_CMD 0x2f
- #define IPMI_READ_EVENT_MSG_BUFFER_CMD 0x35
- #define IPMI_GET_CHANNEL_INFO_CMD 0x42
-+#define IPMI_RESERVE_SDR 0x22
-+#define IPMI_GET_SDR 0x23
-+#define IPMI_GET_SENSOR_STATE_READING 0x2D
-+#define IPMI_SET_SENSOR_HYSTERESIS 0x24
-+#define IPMI_SET_SENSOR_THRESHOLD 0x26
-
- #define IPMI_NETFN_STORAGE_REQUEST 0x0a
- #define IPMI_NETFN_STORAGE_RESPONSE 0x0b
-@@ -79,10 +85,13 @@
- #define IPMI_NODE_BUSY_ERR 0xc0
- #define IPMI_INVALID_COMMAND_ERR 0xc1
- #define IPMI_TIMEOUT_ERR 0xc3
-+#define IPMI_INVALID_RESERVATION_ID 0xc5
- #define IPMI_ERR_MSG_TRUNCATED 0xc6
- #define IPMI_REQ_LEN_INVALID_ERR 0xc7
- #define IPMI_REQ_LEN_EXCEEDED_ERR 0xc8
- #define IPMI_NOT_IN_MY_STATE_ERR 0xd5 /* IPMI 2.0 */
-+#define IPMI_ERR_RETURNING_REQ_BYTES 0xca
-+#define IPMI_ERR_PROVIDING_RESPONSE 0xce
- #define IPMI_LOST_ARBITRATION_ERR 0x81
- #define IPMI_BUS_ERR 0x82
- #define IPMI_NAK_ON_WRITE_ERR 0x83
+++ /dev/null
-diff -rduNp linux-2.6.20.3.orig/drivers/char/ipmi/ipmi_msghandler.c linux-2.6.20.3/drivers/char/ipmi/ipmi_msghandler.c
---- linux-2.6.20.3.orig/drivers/char/ipmi/ipmi_msghandler.c 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/drivers/char/ipmi/ipmi_msghandler.c 2007-03-14 14:23:02.000000000 +0100
-@@ -1954,6 +1954,24 @@ static void remove_proc_entries(ipmi_smi
- #endif /* CONFIG_PROC_FS */
- }
-
-+/*
-+ * Retrieves the bmc_device struct for a given ipmi interface number (or NULL if none).
-+ */
-+struct device *ipmi_get_bmcdevice(int if_num)
-+{
-+ ipmi_smi_t intf;
-+ mutex_lock(&ipmi_interfaces_mutex);
-+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
-+ if (intf->intf_num == if_num){
-+ mutex_unlock(&ipmi_interfaces_mutex);
-+ return &intf->bmc->dev->dev;
-+ }
-+ }
-+ mutex_unlock(&ipmi_interfaces_mutex);
-+
-+ return NULL;
-+}
-+
- static int __find_bmc_guid(struct device *dev, void *data)
- {
- unsigned char *id = data;
-@@ -4183,3 +4201,4 @@ EXPORT_SYMBOL(ipmi_get_my_LUN);
- EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
- EXPORT_SYMBOL(ipmi_user_set_run_to_completion);
- EXPORT_SYMBOL(ipmi_free_recv_msg);
-+EXPORT_SYMBOL(ipmi_get_bmcdevice);
-diff -rduNp linux-2.6.20.3.orig/drivers/hwmon/Kconfig linux-2.6.20.3/drivers/hwmon/Kconfig
---- linux-2.6.20.3.orig/drivers/hwmon/Kconfig 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/drivers/hwmon/Kconfig 2007-03-14 14:23:02.000000000 +0100
-@@ -218,6 +218,16 @@ config SENSORS_GL520SM
- This driver can also be built as a module. If so, the module
- will be called gl520sm.
-
-+config SENSORS_IPMI
-+ tristate "IPMI Hardware Monitoring Support"
-+ depends on HWMON && IPMI_HANDLER && EXPERIMENTAL
-+ help
-+ If you say yes here you get support for sensors monitored by
-+ an IPMI baseboard management controller (BMC).
-+
-+ This driver can also be built as a module. If so, the module
-+ will be called ipmisensors.
-+
- config SENSORS_IT87
- tristate "ITE IT87xx and compatibles"
- depends on HWMON && I2C
-diff -rduNp linux-2.6.20.3.orig/drivers/hwmon/Makefile linux-2.6.20.3/drivers/hwmon/Makefile
---- linux-2.6.20.3.orig/drivers/hwmon/Makefile 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/drivers/hwmon/Makefile 2007-03-14 14:23:02.000000000 +0100
-@@ -28,6 +28,7 @@ obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o
- obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
- obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
- obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
-+obj-$(CONFIG_SENSORS_IPMI) += ipmisensors.o
- obj-$(CONFIG_SENSORS_IT87) += it87.o
- obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
- obj-$(CONFIG_SENSORS_LM63) += lm63.o
-diff -rduNp linux-2.6.20.3.orig/drivers/hwmon/ipmisensors.c linux-2.6.20.3/drivers/hwmon/ipmisensors.c
---- linux-2.6.20.3.orig/drivers/hwmon/ipmisensors.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.20.3/drivers/hwmon/ipmisensors.c 2007-03-14 14:44:42.000000000 +0100
-@@ -0,0 +1,1552 @@
-+/*
-+ * ipmisensors.c - lm-sensors/hwmon interface to IPMI sensors.
-+ *
-+ * Copyright (C) 2004-2006 Yani Ioannou <yani.ioannou@gmail.com>
-+ *
-+ * Adapted from bmcsensors (lm-sensors for linux 2.4)
-+ * bmcsensors (C) Mark D. Studebaker <mdsxyz123@yahoo.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ */
-+
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/param.h>
-+#include <linux/hwmon.h>
-+#include <linux/list.h>
-+#include <linux/slab.h>
-+#include <linux/device.h>
-+#include <linux/hwmon.h>
-+
-+#include "ipmisensors.h"
-+
-+/****** Function Prototypes ******/
-+static void ipmisensors_send_message(struct ipmisensors_bmc_data *bmc,
-+ long msgid, struct kernel_ipmi_msg *msg);
-+static void ipmisensors_reserve_sdr(struct ipmisensors_bmc_data *bmc);
-+static void ipmisensors_get_sdr(struct ipmisensors_bmc_data *bmc, u16 res_id,
-+ u16 record, u8 offset);
-+static void ipmisensors_set_sensor_threshold(struct ipmisensors_bmc_data *bmc,
-+ u8 number, int value,
-+ int lim_index);
-+static void ipmisensors_get_reading(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr);
-+static void ipmisensors_msg_handler(struct ipmi_recv_msg *msg,
-+ void *user_msg_data);
-+static int ipmisensors_intf_registered(int ipmi_intf);
-+static int ipmisensors_bmc_registered(struct device *bmc);
-+static void ipmisensors_register_bmc(int ipmi_intf, struct ipmi_addr *address);
-+static void ipmisensors_unregister_bmc(int ipmi_intf);
-+static void ipmisensors_unregister_bmc_all(void);
-+static void ipmisensors_new_smi(int if_num, struct device *dev);
-+static void ipmisensors_smi_gone(int if_num);
-+static void ipmisensors_update_bmc(struct work_struct *);
-+static void ipmisensors_cleanup(void);
-+
-+/****** Static Vars ******/
-+
-+/* set when module is being removed */
-+static int cleanup = 0;
-+
-+/* ipmisensors driver data */
-+static struct ipmisensors_data driver_data = {
-+ .driver_name = "bmc",
-+ .bmc_data = LIST_HEAD_INIT(driver_data.bmc_data),
-+ .interfaces = 0,
-+ .smi_watcher = {
-+ .owner = THIS_MODULE,
-+ .new_smi = ipmisensors_new_smi,
-+ .smi_gone = ipmisensors_smi_gone,
-+ },
-+ .ipmi_hndlrs = {
-+ .ipmi_recv_hndl = ipmisensors_msg_handler,
-+ },
-+};
-+
-+/* sensor refresh workqueue */
-+static struct workqueue_struct *ipmisensors_workqueue;
-+
-+/****** SDR List Functions ******/
-+/**
-+ * Creates a new sdrdata struct, or returns NULL if insufficient memory.
-+ */
-+static struct sdrdata *ipmisensors_new_sdr(void)
-+{
-+ struct sdrdata *sdr;
-+
-+ sdr = kmem_cache_alloc(driver_data.sdrdata_cache, GFP_ATOMIC);
-+ if (sdr) {
-+ memset(sdr, 0, sizeof(struct sdrdata));
-+ } else {
-+ printk(KERN_ERR
-+ "ipmisensors: Couldn't allocate memory for new SDR\n");
-+ }
-+
-+ return sdr;
-+}
-+
-+/**
-+ * Adds the given sdrdata struct to the given bmc's SDR list.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static inline void ipmisensors_add_sdr(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr)
-+{
-+ list_add(&sdr->list, &bmc->sdrs);
-+ printk(KERN_DEBUG
-+ "ipmisensors: SDR %d: type 0x%02x (%s)\n",
-+ bmc->sdr_count, sdr->stype, sdr->id);
-+ bmc->sdr_count++;
-+}
-+
-+/**
-+ * Cleanup the sdr list for the given BMC.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static void ipmisensors_sdr_cleanup(struct ipmisensors_bmc_data *bmc)
-+{
-+ struct sdrdata *cursor, *next;
-+
-+ /* find and free each sdr data struct */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ device_remove_file(bmc->dev, &cursor->attr.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_min.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_max.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_label.dev_attr);
-+
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+
-+ list_del(&cursor->list);
-+ kmem_cache_free(driver_data.sdrdata_cache, cursor);
-+ }
-+}
-+
-+/* worker function for workqueue ipmisensors_workqueue */
-+static void ipmisensors_update_bmc(struct work_struct *work)
-+{
-+ struct ipmisensors_bmc_data *bmc = container_of(work, struct ipmisensors_bmc_data, update_work.work);
-+
-+ /* don't start an update cycle if one already in progress */
-+ if (bmc->state != STATE_READING) {
-+ struct sdrdata *cursor, *next;
-+ bmc->state = STATE_READING;
-+ printk(KERN_DEBUG "ipmisensors: starting update\n");
-+
-+ /* init semaphore to 1 for update cycle */
-+ sema_init(&bmc->update_semaphore, 1);
-+
-+ /* update each sdr reading */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ ipmisensors_get_reading(bmc, cursor);
-+ }
-+ }
-+
-+ /* wait for readings (need timeout?) */
-+ down_interruptible(&bmc->update_semaphore);
-+
-+ printk(KERN_DEBUG "ipmisensors: update complete\n");
-+
-+ bmc->state = STATE_DONE;
-+
-+ /* if the module isn't cleaning up, schedule another update */
-+ if (!cleanup)
-+ queue_delayed_work(ipmisensors_workqueue, &bmc->update_work,
-+ bmc->update_period * HZ);
-+}
-+
-+/****** IPMI Message Sending ******/
-+
-+/**
-+ * Send a message to the IPMI BMC
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @msgid: the message id to use.
-+ * @msg: the ipmi message structure.
-+ */
-+static void ipmisensors_send_message(struct ipmisensors_bmc_data *bmc,
-+ long msgid, struct kernel_ipmi_msg *msg)
-+{
-+ if (msg->data == NULL)
-+ printk(KERN_DEBUG "ipmisensors: Send 0x%x\n", msg->cmd);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: Send 0x%x 0x%x 0x%x\n",
-+ msg->cmd, msg->data[0], msg->data[1]);
-+
-+ /* This should be ipmi_request, but Corey had to remove
-+ * that due to it being unused at the moment, as soon as
-+ * this makes it into the kernel we should request it be re-instated.
-+ */
-+ ipmi_request_settime(bmc->user, &bmc->address, msgid, msg, bmc, 0,
-+ -1, 0);
-+}
-+
-+/**
-+ * Compose and send a "reserve SDR" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static void ipmisensors_reserve_sdr(struct ipmisensors_bmc_data *bmc)
-+{
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_RESERVE_SDR;
-+ bmc->tx_message.data_len = 0;
-+ bmc->tx_message.data = NULL;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Componse and send a "get SDR" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @res_id:
-+ * @record:
-+ * @offset:
-+ */
-+static void ipmisensors_get_sdr(struct ipmisensors_bmc_data *bmc, u16 res_id,
-+ u16 record, u8 offset)
-+{
-+ printk(KERN_DEBUG "ipmisensors: Get SDR 0x%x 0x%x 0x%x\n",
-+ res_id, record, offset);
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_GET_SDR;
-+ bmc->tx_message.data_len = 6;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = res_id & 0xff;
-+ bmc->tx_msg_data[1] = res_id >> 8;
-+ bmc->tx_msg_data[2] = record & 0xff;
-+ bmc->tx_msg_data[3] = record >> 8;
-+ bmc->tx_msg_data[4] = offset;
-+ bmc->tx_msg_data[5] = bmc->ipmi_sdr_partial_size;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Compose and send a "set sensor threshold" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @id: the ipmi id number of the sensor.
-+ * @value: the new value for the threshold.
-+ * @lim_index: the index in the lim[] array for which this value applies.
-+ */
-+static void ipmisensors_set_sensor_threshold(struct ipmisensors_bmc_data *bmc,
-+ u8 number, int value,
-+ int lim_index)
-+{
-+ int i;
-+
-+ printk(KERN_DEBUG "ipmisensors: Set SDR Threshold %d %d %d\n",
-+ number, value, lim_index);
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_SET_SENSOR_THRESHOLD;
-+ bmc->tx_message.data_len = 8;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = number & 0xff;
-+ bmc->tx_msg_data[1] = 0x01 << lim_index;
-+
-+ if (lim_index > 5 || lim_index < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Error - ipmisensors_set_sensor_threshold given invalid lim_index\n");
-+ return;
-+ }
-+
-+ for (i = 2; i < 8; i++)
-+ bmc->tx_msg_data[i] = 0x00;
-+
-+ bmc->tx_msg_data[lim_index] = value && 0xff;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Compose and send a "get sensor reading" message for the given sdr.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @sdr: the sdr of the sensor to get the reading for.
-+ */
-+static void ipmisensors_get_reading(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr)
-+{
-+ bmc->tx_message.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
-+ bmc->tx_message.cmd = IPMI_GET_SENSOR_STATE_READING;
-+ bmc->tx_message.data_len = 1;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = sdr->number;
-+ bmc->current_sdr = sdr;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+ down_interruptible(&bmc->update_semaphore);
-+}
-+
-+/****** IPMI Message Receiving ******/
-+
-+/**
-+ * Process an sensor reading response message.
-+ *
-+ * @bmc: the bmc the message is from
-+ * @msg: the IPMI SDR response message
-+ */
-+static void ipmisensors_rcv_reading_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ struct sdrdata *sdr = bmc->current_sdr;
-+
-+ if (sdr == NULL) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error ipmisensors_rcv_reading with NULL sdr\n");
-+ return;
-+ }
-+
-+ sdr->reading = msg->data[1];
-+ sdr->status = msg->data[2];
-+ sdr->thresholds = msg->data[3];
-+
-+ printk(KERN_DEBUG "ipmisensors: sensor %d (type %d) reading %d\n",
-+ sdr->number, sdr->stype, msg->data[1]);
-+
-+ up(&bmc->update_semaphore);
-+}
-+
-+/**
-+ * Unpack based on string type, convert to normal, null terminate.
-+ */
-+static void ipmisensors_sprintf(u8 * to, u8 * from, u8 type, u8 length)
-+{
-+ static const u8 *bcdplus = "0123456789 -.:,_";
-+ int i;
-+
-+ switch (type) {
-+ case 0: /* unicode */
-+ for (i = 0; i < length; i++)
-+ *to++ = (*from++ & 0x7f);
-+ *to = 0;
-+ break;
-+ case 1: /* BCD Plus */
-+ for (i = 0; i < length; i++)
-+ *to++ = bcdplus[*from++ & 0x0f];
-+ *to = 0;
-+ break;
-+ case 2: /* packed ascii *//* if not a mult. of 3 this will run over */
-+ for (i = 0; i < length; i += 3) {
-+ *to++ = *from & 0x3f;
-+ *to++ = *from >> 6 | ((*(from+1) & 0xf) << 2);
-+ from++;
-+ *to++ = *from >> 4 | ((*(from+1) & 0x3) << 4);
-+ from++;
-+ *to++ = (*from++ >> 2) & 0x3f;
-+ }
-+ *to = 0;
-+ break;
-+ case 3: /* normal */
-+ if (length > 1)
-+ memcpy(to, from, length);
-+ to[length] = 0;
-+ break;
-+ }
-+}
-+
-+/* IPMI V1.5 Section 30 */
-+static const int exps[] =
-+ { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 };
-+
-+/* Return 0 for fan, 2 for temp, 3 for voltage
-+ We could make it variable based on the accuracy (= log10(m * 10**k2));
-+ this would work for /proc output, however libsensors resolution
-+ is statically set in lib/chips.c */
-+static int decplaces(struct sdrdata *sd)
-+{
-+ switch (sd->stype) {
-+ case STYPE_TEMP:
-+ return 2;
-+ case STYPE_CURR:
-+ case STYPE_VOLT:
-+ return 3;
-+ case STYPE_FAN:
-+ default:
-+ return 0;
-+ }
-+}
-+
-+/* convert a raw value to a reading. IMPI V1.5 Section 30 */
-+static long conv_val(int value, struct sdrdata *sd)
-+{
-+ u8 k1, k2;
-+ long r;
-+
-+ r = value * sd->m;
-+ k1 = sd->k & 0x0f;
-+ k2 = sd->k >> 4;
-+ if (k1 < 8)
-+ r += sd->b * exps[k1];
-+ else
-+ r += sd->b / exps[16 - k1];
-+ r *= exps[decplaces(sd)];
-+ if (k2 < 8) {
-+ if (sd->linear != 7)
-+ r *= exps[k2];
-+ else
-+ /* this will always truncate to 0: r = 1 / (exps[k2] * r); */
-+ r = 0;
-+ } else {
-+ if (sd->linear != 7)
-+ r /= exps[16 - k2];
-+ else {
-+ if (r != 0)
-+ /* 1 / x * 10 ** (-m) == 10 ** m / x */
-+ r = exps[16 - k2] / r;
-+ else
-+ r = 0;
-+ }
-+ }
-+
-+ return r;
-+}
-+
-+static const char *threshold_text[] = {
-+ "upper non-recoverable threshold",
-+ "upper critical threshold",
-+ "upper non-critical threshold",
-+ "lower non-recoverable threshold",
-+ "lower critical threshold",
-+ "lower non-critical threshold",
-+ "positive-going hysteresis",
-+ "negative-going hysteresis" /* unused */
-+};
-+
-+/* select two out of the 8 possible readable thresholds, and place indexes into the limits
-+ array into lim1 and lim2. Set writable flags */
-+static void ipmisensors_select_thresholds(struct sdrdata *sd)
-+{
-+ u8 capab = sd->capab;
-+ u16 mask = sd->thresh_mask;
-+ int tmp;
-+
-+ sd->lim1 = -1;
-+ sd->lim2 = -1;
-+ sd->lim1_write = 0;
-+ sd->lim2_write = 0;
-+
-+ if (((capab & 0x0c) == 0x04) || /* readable thresholds ? */
-+ ((capab & 0x0c) == 0x08)) {
-+ /* select upper threshold */
-+ if (mask & 0x10) { /* upper crit */
-+ sd->lim1 = 1;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x1000))
-+ sd->lim1_write = 1;
-+ } else if (mask & 0x20) { /* upper non-recov */
-+ sd->lim1 = 0;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x2000))
-+ sd->lim1_write = 1;
-+ } else if (mask & 0x08) { /* upper non-crit */
-+ sd->lim1 = 2;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0800))
-+ sd->lim1_write = 1;
-+ }
-+
-+ /* select lower threshold */
-+ if ((((capab & 0x30) == 0x10) || /* readable ? */
-+ ((capab & 0x30) == 0x20)) && /* pos hyst */
-+ sd->stype == STYPE_TEMP)
-+ sd->lim2 = 6;
-+ else if (mask & 0x02) { /* lower crit */
-+ sd->lim2 = 4;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0200))
-+ sd->lim2_write = 1;
-+ } else if (mask & 0x04) { /* lower non-recov */
-+ sd->lim2 = 3;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0400))
-+ sd->lim2_write = 1;
-+ } else if (mask & 0x01) { /* lower non-crit */
-+ sd->lim2 = 5;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0100))
-+ sd->lim2_write = 1;
-+ }
-+ }
-+
-+ /* swap lim1/lim2 if m < 0 or function is 1/x (but not both!) */
-+ if ((sd->m < 0 && sd->linear != 7) || (sd->m >= 0 && sd->linear == 7)) {
-+ tmp = sd->lim1;
-+ sd->lim1 = sd->lim2;
-+ sd->lim2 = tmp;
-+ }
-+
-+ if (sd->lim1 >= 0)
-+ printk(KERN_INFO "ipmisensors: using %s for upper limit\n",
-+ threshold_text[sd->lim1]);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: no readable upper limit\n");
-+
-+ if (sd->lim2 >= 0)
-+ printk(KERN_INFO "ipmisensors: using %s for lower limit\n",
-+ threshold_text[sd->lim2]);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: no readable lower limit\n");
-+}
-+
-+/************* sysfs callback functions *********/
-+static ssize_t show_update_period(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+
-+ return snprintf(buf, 20, "%d\n", aattr->bmc->update_period);
-+}
-+
-+static ssize_t store_update_period(struct device *dev,
-+ struct device_attribute *attr,
-+ const char *buf, size_t count)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+
-+ aattr->bmc->update_period = simple_strtoul(buf, NULL, 10);;
-+ return count;
-+};
-+
-+static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ return snprintf(buf, 20, "%ld\n",
-+ conv_val(sattr->sdr->reading, sattr->sdr));
-+}
-+
-+static ssize_t show_sensor_max(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ long max = 0;
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ if (sattr->sdr->lim1 >= 0)
-+ max = conv_val(sattr->sdr->limits[sattr->sdr->lim1],
-+ sattr->sdr);
-+ return snprintf(buf, 20, "%ld\n", max);
-+}
-+
-+static ssize_t show_sensor_min(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ long min = 0;
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ if (sattr->sdr->lim2 >= 0)
-+ min = conv_val(sattr->sdr->limits[sattr->sdr->lim2],
-+ sattr->sdr);
-+ return snprintf(buf, 20, "%ld\n", min);
-+};
-+
-+static ssize_t show_sensor_label(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ u8 label[SDR_MAX_UNPACKED_ID_LENGTH];
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ ipmisensors_sprintf(label, sattr->sdr->id, sattr->sdr->string_type,
-+ sattr->sdr->id_length);
-+ return snprintf(buf, 20, "%s\n", label);
-+};
-+
-+static ssize_t store_sensor_max(struct device *dev,
-+ struct device_attribute *attr, const char *buf,
-+ size_t count)
-+{
-+ long val = simple_strtoul(buf, NULL, 10);
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ printk(KERN_DEBUG "ipmisensors: set max on sensor #%d to %ld",
-+ sattr->sdr->number, val);
-+ ipmisensors_set_sensor_threshold(sattr->sdr->bmc, sattr->sdr->number,
-+ val, sattr->sdr->lim1);
-+ return count;
-+};
-+
-+static ssize_t store_sensor_min(struct device *dev,
-+ struct device_attribute *attr, const char *buf,
-+ size_t count)
-+{
-+ long val = simple_strtoul(buf, NULL, 10);
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ printk(KERN_DEBUG "ipmisensors: set min on sensor #%d to %ld",
-+ sattr->sdr->number, val);
-+ ipmisensors_set_sensor_threshold(sattr->sdr->bmc, sattr->sdr->number,
-+ val, sattr->sdr->lim2);
-+ return count;
-+};
-+
-+static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+ return snprintf(buf, 20, "%d\n", aattr->bmc->alarms);
-+};
-+
-+static ssize_t show_name(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ return snprintf(buf, 20, "%s\n", driver_data.driver_name);
-+};
-+
-+/* work function to build the sysfs entries using the ipmi sdrs */
-+static void ipmisensors_build_sysfs(struct work_struct *work)
-+{
-+ int temps = 0, volts = 0, currs = 0, fans = 0;
-+ struct sdrdata *cursor, *next;
-+ struct ipmisensors_bmc_data *bmc = container_of(work, struct ipmisensors_bmc_data, sysfs_work);
-+
-+ /* find and create entries for each sdr data struct */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ u8 id[SDR_MAX_UNPACKED_ID_LENGTH];
-+
-+ cursor->attr_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+ cursor->attr_max_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+ cursor->attr_min_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+
-+ if (cursor->id_length > 0) {
-+ cursor->attr_label_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+
-+ if (cursor->attr_label_name == NULL) {
-+ printk(KERN_INFO
-+ "ipmisensors: Out of memory (kmalloc failed)");
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ return;
-+ }
-+ }
-+
-+ if (cursor->attr_name == NULL || cursor->attr_max_name == NULL
-+ || cursor->attr_min_name == NULL
-+ || cursor->attr_label_name == NULL) {
-+ printk(KERN_INFO
-+ "ipmisensors: Out of memory (kmalloc failed)");
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+ return;
-+ }
-+
-+ switch (cursor->stype) {
-+ case (STYPE_TEMP):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "temp%d_input", ++temps);
-+ /* create min, max attributes */
-+ snprintf(cursor->attr_max_name, MAX_FILENAME_LENGTH,
-+ "temp%d_max", temps);
-+ snprintf(cursor->attr_min_name, MAX_FILENAME_LENGTH,
-+ "temp%d_min", temps);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "temp%d_label", temps);
-+ break;
-+ case (STYPE_VOLT):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "in%d_input", ++volts);
-+ /* create min, max attributes */
-+ snprintf(cursor->attr_max_name, MAX_FILENAME_LENGTH,
-+ "in%d_max", volts);
-+ snprintf(cursor->attr_min_name, MAX_FILENAME_LENGTH,
-+ "in%d_min", volts);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "in%d_label", volts);
-+ break;
-+ case (STYPE_CURR):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "curr%d_input", ++currs);
-+ /* create min, max attributes */
-+ sprintf(cursor->attr_max_name, "curr%d_max", currs);
-+ sprintf(cursor->attr_min_name, "curr%d_min", currs);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "curr%d_label", currs);
-+ break;
-+ case (STYPE_FAN):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "fan%d_input", ++fans);
-+ /* create min, max attributes */
-+ sprintf(cursor->attr_max_name, "fan%d_max", fans);
-+ sprintf(cursor->attr_min_name, "fan%d_min", fans);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "fan%d_label", fans);
-+ break;
-+ default:
-+ printk(KERN_INFO "ipmisensors: unkown sensor type\n");
-+ continue;
-+ }
-+
-+ cursor->attr.dev_attr.attr.name = cursor->attr_name;
-+ cursor->attr.dev_attr.attr.mode = S_IRUGO;
-+ cursor->attr.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr.dev_attr.show = show_sensor;
-+ cursor->attr.dev_attr.store = NULL;
-+ cursor->attr.sdr = cursor;
-+
-+ cursor->attr_min.dev_attr.attr.name = cursor->attr_min_name;
-+ cursor->attr_min.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_min.dev_attr.show = show_sensor_min;
-+ cursor->attr_min.sdr = cursor;
-+
-+ if (cursor->lim2_write) {
-+ printk(KERN_INFO
-+ "ipmisensors: You have a writable sensor threshold! Send me an e-mail at <yani.ioannou@gmail.com>.\n");
-+ cursor->attr_min.dev_attr.store = store_sensor_min;
-+ cursor->attr_min.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ } else {
-+ cursor->attr_min.dev_attr.store = NULL;
-+ cursor->attr_min.dev_attr.attr.mode = S_IRUGO;
-+ }
-+
-+ cursor->attr_max.dev_attr.attr.name = cursor->attr_max_name;
-+ cursor->attr_max.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_max.dev_attr.show = show_sensor_max;
-+ cursor->attr_max.sdr = cursor;
-+
-+ if (cursor->lim1_write) {
-+ printk(KERN_INFO
-+ "ipmisensors: You have a writable sensor threshold! Send me an e-mail at <yani.ioannou@gmail.com>.\n");
-+ cursor->attr_max.dev_attr.store = store_sensor_max;
-+ cursor->attr_max.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ } else {
-+ cursor->attr_max.dev_attr.store = NULL;
-+ cursor->attr_max.dev_attr.attr.mode = S_IRUGO;
-+ }
-+
-+ if (cursor->id_length > 0) {
-+ cursor->attr_label.dev_attr.attr.name =
-+ cursor->attr_label_name;
-+ cursor->attr_label.dev_attr.attr.mode = S_IRUGO;
-+ cursor->attr_label.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_label.dev_attr.show = show_sensor_label;
-+ cursor->attr_label.dev_attr.store = NULL;
-+ cursor->attr_label.sdr = cursor;
-+ }
-+
-+ printk(KERN_INFO
-+ "ipmisensors: registering sensor %d: (type 0x%.2x) "
-+ "(fmt=%d; m=%d; b=%d; k1=%d; k2=%d; cap=0x%.2x; mask=0x%.4x)\n",
-+ cursor->number, cursor->stype, cursor->format, cursor->m,
-+ cursor->b, cursor->k & 0xf, cursor->k >> 4,
-+ cursor->capab, cursor->thresh_mask);
-+
-+ if (cursor->id_length > 0) {
-+ ipmisensors_sprintf(id, cursor->id, cursor->string_type,
-+ cursor->id_length);
-+ switch (cursor->stype) {
-+ case (STYPE_TEMP):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label temp%d \"%s\"\n",
-+ temps, id);
-+ break;
-+ case (STYPE_VOLT):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label in%d \"%s\"\n",
-+ volts, id);
-+ break;
-+ case (STYPE_CURR):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label curr%d \"%s\"\n",
-+ currs, id);
-+ break;
-+ case (STYPE_FAN):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label fan%d \"%s\"\n",
-+ fans, id);
-+ break;
-+ }
-+ }
-+
-+ ipmisensors_select_thresholds(cursor);
-+
-+ if (cursor->linear != 0 && cursor->linear != 7) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: nonlinear function 0x%.2x unsupported, expect bad results\n",
-+ cursor->number, cursor->linear);
-+ }
-+
-+ if ((cursor->format & 0x03) == 0x02) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: 1's complement format unsupported, expect bad results\n",
-+ cursor->number);
-+ } else if ((cursor->format & 0x03) == 0x03) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: threshold sensor only, no readings available",
-+ cursor->number);
-+ }
-+
-+ if (cursor->lim1_write || cursor->lim2_write)
-+ cursor->attr.dev_attr.attr.mode = 0644;
-+ else
-+ cursor->attr.dev_attr.attr.mode = 0444;
-+
-+ if (device_create_file(bmc->dev, &cursor->attr.dev_attr) < 0
-+ || device_create_file(bmc->dev,
-+ &cursor->attr_min.dev_attr) < 0
-+ || device_create_file(bmc->dev,
-+ &cursor->attr_max.dev_attr) < 0
-+ || (cursor->id_length >
-+ 0 ? device_create_file(bmc->dev,
-+ &cursor->attr_label.dev_attr) <
-+ 0 : 0)
-+ ) {
-+ printk(KERN_INFO
-+ "ipmisensors: sysfs file creation failed for SDR %d (%s).\n",
-+ cursor->number, cursor->id);
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+ return;
-+ }
-+ }
-+
-+ bmc->alarms_attr.dev_attr.attr.name = "alarms";
-+ bmc->alarms_attr.dev_attr.attr.mode = S_IRUGO;
-+ bmc->alarms_attr.dev_attr.attr.owner = THIS_MODULE;
-+ bmc->alarms_attr.dev_attr.show = show_alarms;
-+ bmc->alarms_attr.dev_attr.store = NULL;
-+ bmc->alarms_attr.bmc = bmc;
-+
-+ if (device_create_file(bmc->dev, &bmc->alarms_attr.dev_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'alarms'");
-+ return;
-+ }
-+
-+ bmc->name_attr.attr.name = "name";
-+ bmc->name_attr.attr.mode = S_IRUGO;
-+ bmc->name_attr.attr.owner = THIS_MODULE;
-+ bmc->name_attr.show = show_name;
-+
-+ if (device_create_file(bmc->dev, &bmc->name_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'name'");
-+ return;
-+ }
-+
-+ bmc->update_attr.dev_attr.attr.name = "update_period";
-+ bmc->update_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ bmc->update_attr.dev_attr.attr.owner = THIS_MODULE;
-+ bmc->update_attr.dev_attr.show = show_update_period;
-+ bmc->update_attr.dev_attr.store = store_update_period;
-+ bmc->update_attr.bmc = bmc;
-+
-+ if (device_create_file(bmc->dev, &bmc->update_attr.dev_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'update_period'");
-+ return;
-+ }
-+
-+ printk(KERN_INFO
-+ "ipmisensors: registered %d temp, %d volt, %d current, %d fan sensors\n",
-+ temps, volts, currs, fans);
-+
-+ /* This completes the initialization. We can now kickoff the
-+ * periodic update of the bmc sensor's values by scheduling
-+ * the first work.
-+ */
-+ queue_work(ipmisensors_workqueue, &bmc->update_work.work);
-+
-+}
-+
-+/**
-+ * Process an SDR response message, save the SDRs we like in the sdr
-+ * list for the given BMC.
-+ *
-+ * @bmc: the bmc the message is from
-+ * @msg: the IPMI SDR response message
-+ */
-+static void ipmisensors_rcv_sdr_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ u16 record;
-+ int type;
-+ int stype;
-+ int id_length;
-+ int i;
-+ int ipmi_ver = 0;
-+ unsigned char *data;
-+ u8 id[SDR_MAX_UNPACKED_ID_LENGTH];
-+ struct sdrdata *sdr;
-+
-+ if (msg->data[0] != 0) {
-+ /* cut request in half and try again */
-+ bmc->ipmi_sdr_partial_size /= 2;
-+ if (bmc->ipmi_sdr_partial_size < 8) {
-+ printk(KERN_INFO
-+ "ipmisensors: IPMI buffers too small, giving up\n");
-+ bmc->state = STATE_DONE;
-+ return;
-+ }
-+ printk(KERN_DEBUG
-+ "ipmisensors: Reducing SDR request size to %d\n",
-+ bmc->ipmi_sdr_partial_size);
-+
-+ ipmisensors_get_sdr(bmc, 0, 0, 0);
-+ bmc->state = STATE_SDR;
-+ return;
-+ }
-+ if (bmc->ipmi_sdr_partial_size < IPMI_SDR_SIZE) {
-+ if (bmc->rx_msg_data_offset == 0) {
-+ memcpy(bmc->rx_msg_data, msg->data,
-+ bmc->ipmi_sdr_partial_size + 3);
-+ bmc->rx_msg_data_offset =
-+ bmc->ipmi_sdr_partial_size + 3;
-+ } else {
-+ memcpy(bmc->rx_msg_data + bmc->rx_msg_data_offset,
-+ msg->data + 3, bmc->ipmi_sdr_partial_size);
-+ bmc->rx_msg_data_offset += bmc->ipmi_sdr_partial_size;
-+ }
-+ if (bmc->rx_msg_data_offset > bmc->rx_msg_data[7] + 7) {
-+ /* got last chunk */
-+ bmc->rx_msg_data_offset = 0;
-+ data = bmc->rx_msg_data;
-+ } else {
-+ /* get more */
-+ record =
-+ (bmc->rx_msg_data[4] << 8) | bmc->rx_msg_data[3];
-+ ipmisensors_get_sdr(bmc, bmc->resid, record,
-+ bmc->rx_msg_data_offset - 3);
-+ bmc->state = STATE_SDR;
-+ return;
-+ }
-+ } else {
-+ /* got it in one chunk */
-+ data = msg->data;
-+ }
-+
-+ bmc->nextrecord = (data[2] << 8) | data[1];
-+
-+ /* If the ipmi version is 0.9 we have to remap some things.
-+ * Yes this is very ugly, but we aren't the ones who
-+ * implemented an incomplete spec!
-+ */
-+ ipmi_ver = data[5];
-+
-+ type = data[6];
-+ /* known SDR type */
-+ if (type == 1 || type == 2) {
-+ stype = data[(ipmi_ver == 0x90 ? 16 : 15)];
-+ /* known sensor type */
-+ if (stype <= STYPE_MAX) {
-+ if (data[(ipmi_ver == 0x90 ? 17 : 16)] != 0x01) {
-+ if (type == 1)
-+ ipmisensors_sprintf(id, &data[51],
-+ data[50] >> 6,
-+ data[50] & 0x1f);
-+ else
-+ ipmisensors_sprintf(id,
-+ &data[(ipmi_ver ==
-+ 0x90 ? 30 :
-+ 35)],
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 :
-+ 34)] >> 6,
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 :
-+ 34)] & 0x1f);
-+ printk(KERN_INFO
-+ "ipmisensors: skipping non-threshold sensor \"%s\"\n",
-+ id);
-+ } else {
-+ /* add entry to sdrd table */
-+ sdr = ipmisensors_new_sdr();
-+ if (!sdr) {
-+ printk(KERN_ERR
-+ "ipmisensors: could not allocate memory for new SDR");
-+ return;
-+ }
-+ sdr->bmc = bmc;
-+ sdr->stype = stype;
-+ sdr->number = data[10];
-+ sdr->capab = data[(ipmi_ver == 0x90 ? 15 : 14)];
-+ sdr->thresh_mask =
-+ (((u16) data[(ipmi_ver == 0x90 ? 21 : 22)])
-+ << 8) | data[21];
-+ if (type == 1) {
-+ sdr->format =
-+ data[(ipmi_ver ==
-+ 0x90 ? 22 : 24)] >> 6;
-+ sdr->linear =
-+ data[(ipmi_ver ==
-+ 0x90 ? 25 : 26)] & 0x7f;
-+ sdr->m =
-+ data[(ipmi_ver == 0x90 ? 26 : 27)];
-+ sdr->m |= ((u16)
-+ (data
-+ [(ipmi_ver ==
-+ 0x90 ? 27 : 28)]
-+ & 0xc0)) << 2;
-+ if (sdr->m & 0x0200) {
-+ /* sign extend */
-+ sdr->m |= 0xfc00;
-+ }
-+ sdr->b =
-+ data[(ipmi_ver == 0x90 ? 28 : 29)];
-+ sdr->b |= ((u16)
-+ (data
-+ [(ipmi_ver ==
-+ 0x90 ? 29 : 30)]
-+ & 0xc0)) << 2;
-+ if (sdr->b & 0x0200) {
-+ /* sign extend */
-+ sdr->b |= 0xfc00;
-+ }
-+ sdr->k =
-+ data[(ipmi_ver == 0x90 ? 31 : 32)];
-+ sdr->nominal =
-+ data[(ipmi_ver == 0x90 ? 33 : 34)];
-+ for (i = 0; i < SDR_LIMITS; i++) {
-+ /* assume readable */
-+ sdr->limits[i] =
-+ data[(ipmi_ver ==
-+ 0x90 ? 40 : 39) + i];
-+ }
-+ sdr->string_type = data[50] >> 6;
-+ id_length = data[50] & 0x1f;
-+ memcpy(sdr->id, &data[51], id_length);
-+ sdr->id_length = id_length;
-+ } else {
-+ sdr->m = 1;
-+ sdr->b = 0;
-+ sdr->k = 0;
-+ sdr->string_type =
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 : 34)] >> 6;
-+ id_length = data[34] & 0x1f;
-+ if (id_length > 0) {
-+ memcpy(sdr->id,
-+ &data[(ipmi_ver ==
-+ 0x90 ? 30 : 35)],
-+ id_length);
-+ }
-+ sdr->id_length = id_length;
-+ /* limits?? */
-+ if (ipmi_ver == 0x90) {
-+ memcpy(sdr->id,
-+ &data[30], id_length);
-+ sdr->id_length = id_length;
-+ }
-+ }
-+ ipmisensors_add_sdr(bmc, sdr);
-+ }
-+ }
-+ /* peek at the other SDR types */
-+ } else if (type == 0x10 || type == 0x11 || type == 0x12) {
-+ ipmisensors_sprintf(id, data + 19, data[18] >> 6,
-+ data[18] & 0x1f);
-+ if (type == 0x10) {
-+ printk(KERN_INFO
-+ "ipmisensors: Generic Device acc=0x%x; slv=0x%x; lun=0x%x; type=0x%x; \"%s\"\n",
-+ data[8], data[9], data[10], data[13], id);
-+ } else if (type == 0x11) {
-+ printk(KERN_INFO
-+ "ipmisensors: FRU Device acc=0x%x; slv=0x%x; log=0x%x; ch=0x%x; type=0x%x; \"%s\"\n",
-+ data[8], data[9], data[10], data[11], data[13],
-+ id);
-+ } else {
-+ printk(KERN_INFO
-+ "ipmisensors: Mgmt Ctllr Device slv=0x%x; \"%s\"\n",
-+ data[8], id);
-+ }
-+ } else if (type == 0x14) {
-+ printk(KERN_INFO
-+ "ipmisensors: Message Channel Info Records:\n");
-+ for (i = 0; i < 8; i++) {
-+ printk(KERN_INFO "ipmisensors: Channel %d info 0x%x\n",
-+ i, data[9 + i]);
-+ }
-+ } else {
-+ printk(KERN_INFO "ipmisensors: Skipping SDR type 0x%x\n", type);
-+ }
-+ if (ipmi_ver != 0x90) {
-+ if (bmc->nextrecord >= 6224) {
-+ /*YJ stop sensor scan on poweredge 1750 */
-+ bmc->nextrecord = 0xffff;
-+ }
-+ }
-+
-+ if (bmc->nextrecord == 0xFFFF) {
-+ if (bmc->sdr_count == 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: No recognized sensors found.\n");
-+ bmc->state = STATE_DONE;
-+ } else {
-+ printk(KERN_INFO "ipmisensors: all sensors detected\n");
-+ bmc->state = STATE_SYSTABLE;
-+
-+ /* Schedule sysfs build/registration work */
-+ INIT_WORK(&bmc->sysfs_work, ipmisensors_build_sysfs);
-+ queue_work(ipmisensors_workqueue, &bmc->sysfs_work);
-+ }
-+ } else {
-+ ipmisensors_get_sdr(bmc, 0, bmc->nextrecord, 0);
-+ bmc->state = STATE_SDR;
-+ }
-+}
-+
-+/**
-+ * Process incoming messages based on internal state
-+ *
-+ * @bmc: the bmc the message is from.
-+ * @msg: the ipmi message to process.
-+ */
-+static void ipmisensors_rcv_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ switch (bmc->state) {
-+ case STATE_INIT:
-+ case STATE_RESERVE:
-+ bmc->resid = (((u16) msg->data[2]) << 8) | msg->data[1];
-+
-+ printk(KERN_DEBUG "ipmisensors: Got first resid 0x%.4x\n",
-+ bmc->resid);
-+
-+ ipmisensors_get_sdr(bmc, 0, 0, 0);
-+ bmc->state = STATE_SDR;
-+ break;
-+
-+ case STATE_SDR:
-+ case STATE_SDRPARTIAL:
-+ ipmisensors_rcv_sdr_msg(bmc, msg);
-+ break;
-+
-+ case STATE_READING:
-+ ipmisensors_rcv_reading_msg(bmc, msg);
-+ break;
-+
-+ case STATE_UNCANCEL:
-+ bmc->resid = (((u16) msg->data[2]) << 8) | msg->data[1];
-+
-+ printk(KERN_DEBUG "ipmisensors: Got new resid 0x%.4x\n",
-+ bmc->resid);
-+
-+ bmc->rx_msg_data_offset = 0;
-+ ipmisensors_get_sdr(bmc, 0, bmc->nextrecord, 0);
-+ bmc->state = STATE_SDR;
-+ break;
-+
-+ case STATE_DONE:
-+ case STATE_SYSTABLE:
-+ break;
-+ default:
-+ bmc->state = STATE_INIT;
-+ }
-+}
-+
-+/**
-+ * Callback to handle a received IPMI message from a given BMC.
-+ *
-+ * @msg: the received message.
-+ * @handler_data: a pointer to the particular bmc ipmisensors_bmc_data struct.
-+ */
-+static void ipmisensors_msg_handler(struct ipmi_recv_msg *msg,
-+ void *user_msg_data)
-+{
-+ struct ipmisensors_bmc_data *bmc =
-+ (struct ipmisensors_bmc_data *)user_msg_data;
-+
-+ if (msg->msg.data[0] != 0)
-+ printk(KERN_WARNING
-+ "ipmisensors: Error 0x%x on cmd 0x%x/0x%x\n",
-+ msg->msg.data[0], msg->msg.netfn, msg->msg.cmd);
-+
-+ if (bmc != NULL && ipmisensors_intf_registered(bmc->interface_id)) {
-+ if (bmc->state == STATE_SDR &&
-+ msg->msg.data[0] == IPMI_INVALID_RESERVATION_ID) {
-+ /* reservation cancelled, get new resid */
-+ if (++bmc->errorcount > 275) {
-+ printk(KERN_ERR
-+ "ipmisensors: Too many reservations cancelled, giving up\n");
-+ bmc->state = STATE_DONE;
-+ } else {
-+ printk(KERN_DEBUG
-+ "ipmisensors: resid 0x%04x cancelled, getting new one\n",
-+ bmc->resid);
-+
-+ ipmisensors_reserve_sdr(bmc);
-+ bmc->state = STATE_UNCANCEL;
-+ }
-+ } else if (msg->msg.data[0] != IPMI_CC_NO_ERROR &&
-+ msg->msg.data[0] != IPMI_ERR_RETURNING_REQ_BYTES &&
-+ msg->msg.data[0] != IPMI_ERR_PROVIDING_RESPONSE) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error 0x%x on cmd 0x%x/0x%x; state = %d; probably fatal.\n",
-+ msg->msg.data[0], msg->msg.netfn & 0xfe,
-+ msg->msg.cmd, bmc->state);
-+ } else {
-+ printk(KERN_DEBUG "ipmisensors: received message\n");
-+ ipmisensors_rcv_msg(bmc, &msg->msg);
-+ }
-+
-+ } else {
-+ printk(KERN_WARNING
-+ "ipmisensors: Response for non-registered BMC\n");
-+ if (bmc != NULL)
-+ printk(KERN_DEBUG "ipmisensors: BMC ID: %d\n",
-+ bmc->interface_id);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: BMC NULL!\n");
-+ }
-+
-+ ipmi_free_recv_msg(msg);
-+}
-+
-+/****** IPMI Interface Initialization ******/
-+
-+/**
-+ * Return true if the given ipmi interface has been registered.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static int ipmisensors_intf_registered(int ipmi_intf)
-+{
-+ int found = 0;
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->interface_id == ipmi_intf) {
-+ found++;
-+ }
-+ }
-+
-+ return found;
-+}
-+
-+/**
-+ * Return true if the given BMC has been registered.
-+ *
-+ * @bmc: The BMC device.
-+ */
-+static int ipmisensors_bmc_registered(struct device *bmc)
-+{
-+ int found = 0;
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->dev == bmc) {
-+ found++;
-+ }
-+ }
-+
-+ return found;
-+}
-+
-+/**
-+ * Register new IPMI BMC interface. Interface indpendent callback created
-+ * for flexibility in adding new types of interface callbacks in future.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static void ipmisensors_register_bmc(int ipmi_intf, struct ipmi_addr *address)
-+{
-+ int error;
-+
-+ /* allocate a new ipmisensors_bmc_data struct */
-+
-+ struct ipmisensors_bmc_data *bmc = (struct ipmisensors_bmc_data *)
-+ kmalloc(sizeof(struct ipmisensors_bmc_data), GFP_KERNEL);
-+
-+ /* initialize members */
-+ INIT_LIST_HEAD(&bmc->sdrs);
-+ bmc->interface_id = ipmi_intf;
-+
-+ bmc->address = *address;
-+
-+ bmc->sdr_count = 0;
-+ bmc->msgid = 0;
-+ bmc->ipmi_sdr_partial_size = IPMI_CHUNK_SIZE;
-+ bmc->state = STATE_INIT;
-+ bmc->errorcount = 0;
-+ bmc->rx_msg_data_offset = 0;
-+ bmc->dev = ipmi_get_bmcdevice(ipmi_intf);
-+
-+ /* default to 3 second min update interval */
-+ bmc->update_period = 3;
-+
-+ if (bmc->dev == NULL) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, couldn't get BMC device for interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Create IPMI messaging interface user */
-+ error = ipmi_create_user(bmc->interface_id, &driver_data.ipmi_hndlrs,
-+ bmc, &bmc->user);
-+ if (error < 0) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, unable to register user with ipmi interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Register the BMC as a HWMON class device */
-+ bmc->class_dev = hwmon_device_register(bmc->dev);
-+
-+ if (IS_ERR(bmc->class_dev)) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, unable to register hwmon class device for interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Register the BMC in the driver */
-+ if (ipmisensors_bmc_registered(bmc->dev)) {
-+ printk(KERN_ERR
-+ "ipmisensors: BMC on interface %d already registered\n",
-+ bmc->interface_id);
-+ hwmon_device_unregister(bmc->class_dev);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ ipmi_get_version(bmc->user, &bmc->ipmi_version_major,
-+ &bmc->ipmi_version_minor);
-+
-+ /* finally add the new bmc data to the bmc data list */
-+ list_add_tail(&bmc->list, &driver_data.bmc_data);
-+ driver_data.interfaces++;
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Registered IPMI %d.%d BMC over interface %d\n",
-+ bmc->ipmi_version_major,
-+ bmc->ipmi_version_minor, bmc->interface_id);
-+
-+ /* Send a reserve SDR command to the bmc */
-+ ipmisensors_reserve_sdr(bmc);
-+
-+ /* initialize the bmc's update work struct */
-+ INIT_DELAYED_WORK(&bmc->update_work, ipmisensors_update_bmc);
-+}
-+
-+/**
-+ * Callback for when an IPMI BMC is gone. Interface indpendent callback created
-+ * for flexibility in adding new types of interface callbacks in future.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static void ipmisensors_unregister_bmc(int ipmi_intf)
-+{
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->interface_id == ipmi_intf) {
-+ list_del(&cursor->list);
-+ printk(KERN_DEBUG
-+ "ipmisensors: cancelling queued work\n");
-+ /* cancel update work queued for this bmc */
-+ cancel_delayed_work(&cursor->update_work);
-+ printk(KERN_DEBUG
-+ "ipmisensors: waiting for update to finish\n");
-+ /* wait for readings to finish */
-+ while (cursor->state != STATE_DONE) ;
-+
-+ device_remove_file(cursor->dev,
-+ &cursor->alarms_attr.dev_attr);
-+ device_remove_file(cursor->dev,
-+ &cursor->update_attr.dev_attr);
-+ hwmon_device_unregister(cursor->class_dev);
-+ ipmisensors_sdr_cleanup(cursor);
-+ ipmi_destroy_user(cursor->user);
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Unegistered IPMI interface %d\n",
-+ cursor->interface_id);
-+
-+ kfree(cursor);
-+ driver_data.interfaces--;
-+ }
-+ }
-+
-+}
-+
-+/**
-+ * Unregister all registered bmcs.
-+ */
-+static void ipmisensors_unregister_bmc_all(void)
-+{
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ list_del(&cursor->list);
-+
-+ /* cancel update work queued for this bmc */
-+ printk(KERN_DEBUG "ipmisensors: cancelling queued work\n");
-+ cancel_delayed_work(&cursor->update_work);
-+
-+ printk(KERN_DEBUG
-+ "ipmisensors: waiting for update to finish\n");
-+ /* wait for readings to finish */
-+ while (cursor->state != STATE_DONE) ;
-+
-+ device_remove_file(cursor->dev, &cursor->alarms_attr.dev_attr);
-+ device_remove_file(cursor->dev, &cursor->update_attr.dev_attr);
-+ hwmon_device_unregister(cursor->class_dev);
-+ ipmisensors_sdr_cleanup(cursor);
-+ ipmi_destroy_user(cursor->user);
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Unegistered IPMI interface %d\n",
-+ cursor->interface_id);
-+
-+ kfree(cursor);
-+ }
-+
-+ driver_data.interfaces = 0;
-+}
-+
-+/**
-+ * Callback for when a new IPMI SMI type interface is found.
-+ *
-+ * @if_num: The IPMI interface number.
-+ */
-+static void ipmisensors_new_smi(int if_num, struct device *dev)
-+{
-+ struct ipmi_addr smi_address = {
-+ IPMI_SYSTEM_INTERFACE_ADDR_TYPE,
-+ IPMI_BMC_CHANNEL,
-+ {0},
-+ };
-+
-+ /* calls the generic new interface function */
-+ ipmisensors_register_bmc(if_num, &smi_address);
-+}
-+
-+/**
-+ * Callback for when an exisiting IPMI SMI type interface is gone.
-+ *
-+ * @if_num: The IPMI interface number.
-+ */
-+static void ipmisensors_smi_gone(int if_num)
-+{
-+ if (driver_data.interfaces > 0) {
-+ ipmisensors_unregister_bmc(if_num);
-+ }
-+}
-+
-+/**
-+ * Initialize the module.
-+ */
-+static int __init ipmisensors_init(void)
-+{
-+ int error;
-+ printk(KERN_INFO "ipmisensors - IPMI BMC sensors interface\n");
-+
-+ /* init cache managers */
-+ driver_data.sdrdata_cache =
-+ kmem_cache_create("ipmisensors_sdrdata", sizeof(struct sdrdata), 0,
-+ 0, NULL, NULL);
-+ driver_data.sysfsattr_cache =
-+ kmem_cache_create("ipmisensors_sysfsattr",
-+ sizeof(struct ipmisensors_device_attribute), 0, 0,
-+ NULL, NULL);
-+
-+ if (!driver_data.sdrdata_cache || !driver_data.sysfsattr_cache) {
-+ if (driver_data.sdrdata_cache)
-+ kmem_cache_destroy(driver_data.sdrdata_cache);
-+ if (driver_data.sysfsattr_cache)
-+ kmem_cache_destroy(driver_data.sysfsattr_cache);
-+ return -ENOMEM;
-+ }
-+
-+ /* register IPMI interface callback(s) */
-+ error = ipmi_smi_watcher_register(&driver_data.smi_watcher);
-+ if (error) {
-+ printk(KERN_WARNING
-+ "ipmisensors: can't register smi watcher\n");
-+ return error;
-+ }
-+
-+ /* create work queue, keep it simple, single-threaded */
-+ ipmisensors_workqueue =
-+ create_singlethread_workqueue("ipmisensors_workqueue");
-+
-+ return 0;
-+}
-+
-+/**
-+ * Cleanup
-+ */
-+static void ipmisensors_cleanup(void)
-+{
-+ /* start cleanup */
-+ cleanup = 1;
-+
-+ /* unregister bmcs */
-+ printk(KERN_DEBUG "ipmisensors: unregister bmcs\n");
-+ ipmi_smi_watcher_unregister(&driver_data.smi_watcher);
-+ ipmisensors_unregister_bmc_all();
-+
-+ /* flush & destroy work queue */
-+ printk(KERN_DEBUG "ipmisensors: destroy workqueue\n");
-+ flush_workqueue(ipmisensors_workqueue);
-+ destroy_workqueue(ipmisensors_workqueue);
-+
-+ /* remove cache managers */
-+ if (driver_data.sdrdata_cache)
-+ kmem_cache_destroy(driver_data.sdrdata_cache);
-+ if (driver_data.sysfsattr_cache)
-+ kmem_cache_destroy(driver_data.sysfsattr_cache);
-+}
-+
-+/**
-+ * Cleanup and exit the module
-+ */
-+static void __exit ipmisensors_exit(void)
-+{
-+ ipmisensors_cleanup();
-+ printk(KERN_DEBUG "ipmisensors: cleanup finished\n");
-+}
-+
-+MODULE_AUTHOR("Yani Ioannou <yani.ioannou@gmail.com>");
-+MODULE_DESCRIPTION("IPMI BMC sensors");
-+MODULE_LICENSE("GPL");
-+
-+module_init(ipmisensors_init);
-+module_exit(ipmisensors_exit);
-diff -rduNp linux-2.6.20.3.orig/drivers/hwmon/ipmisensors.h linux-2.6.20.3/drivers/hwmon/ipmisensors.h
---- linux-2.6.20.3.orig/drivers/hwmon/ipmisensors.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.20.3/drivers/hwmon/ipmisensors.h 2007-03-14 14:41:23.000000000 +0100
-@@ -0,0 +1,240 @@
-+/*
-+ * ipmisensors.h - lm_sensors interface to IPMI sensors.
-+ *
-+ * Copyright (C) 2004-2006 Yani Ioannou <yani.ioannou@gmail.com>
-+ *
-+ * Adapted from bmcsensors (lm-sensors for linux 2.4)
-+ * bmcsensors (C) Mark D. Studebaker <mdsxyz123@yahoo.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ */
-+
-+#include <linux/ipmi.h>
-+#include <linux/list.h>
-+#include <linux/slab.h>
-+#include <linux/workqueue.h>
-+
-+/* SDR defs */
-+#define STYPE_TEMP 0x01
-+#define STYPE_VOLT 0x02
-+#define STYPE_CURR 0x03
-+#define STYPE_FAN 0x04
-+
-+#define SDR_LIMITS 8
-+#define SDR_MAX_ID_LENGTH 16
-+#define SDR_MAX_UNPACKED_ID_LENGTH ((SDR_MAX_ID_LENGTH * 4 / 3) + 2)
-+
-+/* the last sensor type we are interested in */
-+#define STYPE_MAX 4
-+
-+#define IPMI_SDR_SIZE 67
-+#define IPMI_CHUNK_SIZE 16
-+
-+#define MAX_FILENAME_LENGTH 30
-+
-+struct ipmisensors_device_attribute {
-+ struct device_attribute dev_attr;
-+ struct sdrdata *sdr;
-+};
-+#define to_ipmisensors_dev_attr(_dev_attr) \
-+ container_of(_dev_attr, struct ipmisensors_device_attribute, dev_attr)
-+
-+#define IPMISENSORS_DEVICE_ATTR(_name,_mode,_show,_store,_index) \
-+struct ipmisensors_attribute sensor_dev_attr_##_name = { \
-+ .dev_attr = __ATTR(_name,_mode,_show,_store), \
-+ .index = _index, \
-+}
-+
-+struct ipmisensors_bmc_device_attribute {
-+ struct device_attribute dev_attr;
-+ struct ipmisensors_bmc_data *bmc;
-+};
-+#define to_ipmisensors_bmc_dev_attr(_dev_attr) \
-+ container_of(_dev_attr, struct ipmisensors_bmc_device_attribute, dev_attr)
-+
-+/**
-+ * &struct_sdrdata stores the IPMI Sensor Data Record (SDR) data, as recieved from the BMC, along with the corresponding sysfs attributes
-+ */
-+struct sdrdata {
-+ struct list_head list;
-+ /* retrieved from SDR, not expected to change */
-+ /* Sensor Type Code */
-+ u8 stype;
-+ u8 number;
-+ /* Sensor Capability Code */
-+ u8 capab;
-+ u16 thresh_mask;
-+ u8 format;
-+ u8 linear;
-+ s16 m;
-+ s16 b;
-+ u8 k;
-+ u8 nominal;
-+ u8 limits[SDR_LIMITS];
-+ /* index into limits for reported upper and lower limit */
-+ int lim1, lim2;
-+ u8 lim1_write, lim2_write;
-+ u8 string_type;
-+ u8 id_length;
-+ u8 id[SDR_MAX_ID_LENGTH];
-+ /* retrieved from reading */
-+ u8 reading;
-+ u8 status;
-+ u8 thresholds;
-+ /* sensor's bmc */
-+ struct ipmisensors_bmc_data *bmc;
-+ /* sysfs entries */
-+ struct ipmisensors_device_attribute attr;
-+ char *attr_name;
-+ struct ipmisensors_device_attribute attr_min;
-+ char *attr_min_name;
-+ struct ipmisensors_device_attribute attr_max;
-+ char *attr_max_name;
-+ struct ipmisensors_device_attribute attr_label;
-+ char *attr_label_name;
-+
-+};
-+
-+/**
-+ * &struct_ipmisensors_data stores the data for the ipmisensors driver.
-+ */
-+struct ipmisensors_data {
-+ /* Driver struct */
-+ char *driver_name;
-+
-+ /* Linked list of ipmisensors_bmc_data structs, one for each BMC */
-+ struct list_head bmc_data;
-+
-+ /* Number of ipmi interfaces (and hence ipmisensors_data structs). */
-+ int interfaces;
-+
-+ /* IPMI kernel interface - SMI watcher */
-+ struct ipmi_smi_watcher smi_watcher;
-+
-+ /* IPMI kernel interface - user handlers */
-+ struct ipmi_user_hndl ipmi_hndlrs;
-+
-+ /* Cache manager for sdrdata cache */
-+ struct kmem_cache *sdrdata_cache;
-+
-+ /* Cache manager for ipmi_sensor_device_attribute cache */
-+ struct kmem_cache *sysfsattr_cache;
-+};
-+
-+/**
-+ * &states: enumeration of state codes for a bmc specific ipmisensors
-+ */
-+enum states {
-+ STATE_INIT,
-+ STATE_RESERVE,
-+ STATE_SDR,
-+ STATE_SDRPARTIAL,
-+ STATE_READING,
-+ STATE_UNCANCEL,
-+ STATE_SYSTABLE,
-+ STATE_DONE
-+};
-+
-+/**
-+ * &struct_ipmisensors_bmc_data stores the data for a particular IPMI BMC.
-+ */
-+struct ipmisensors_bmc_data {
-+ struct list_head list;
-+
-+ /* The IPMI interface number */
-+ int interface_id;
-+
-+ /* The IPMI address */
-+ struct ipmi_addr address;
-+
-+ /* List of sdrdata structs (sdrs) recieved from the BMC */
-+ struct list_head sdrs;
-+
-+ /* Count of the number of sdrs stored in the sdr list */
-+ int sdr_count;
-+
-+ /* next message id */
-+ int msgid;
-+
-+ /* The ipmi interface 'user' used to access this particular bmc */
-+ ipmi_user_t user;
-+
-+ /* BMC IPMI Version (major) */
-+ unsigned char ipmi_version_major;
-+
-+ /* BMC IPMI Version (minor) */
-+ unsigned char ipmi_version_minor;
-+
-+ /* The size of the SDR request message */
-+ int ipmi_sdr_partial_size;
-+
-+ /* transmit message buffer */
-+ struct kernel_ipmi_msg tx_message;
-+
-+ /* ipmi transmited data buffer */
-+ unsigned char tx_msg_data[IPMI_MAX_MSG_LENGTH + 50]; /* why the +50 in bmcsensors? */
-+
-+ /* ipmi recieved data buffer */
-+ unsigned char rx_msg_data[IPMI_MAX_MSG_LENGTH + 50];
-+
-+ /* current recieve buffer offset */
-+ int rx_msg_data_offset;
-+
-+ /* The id of then next SDR record to read during update cycle */
-+ u16 nextrecord;
-+
-+ /* BMC SDR Reservation ID */
-+ u16 resid;
-+
-+ /* Alarm status */
-+ u8 alarms;
-+
-+ /* The cumalative error count for this bmc */
-+ int errorcount;
-+
-+ /* The current state of this bmc w.r.t. ipmisensors (see enum states) */
-+ int state;
-+
-+ /* The current sdr for which a reading is pending */
-+ struct sdrdata *current_sdr;
-+
-+ /* The BMC's device struct */
-+ struct device *dev;
-+
-+ /* hwmon class device */
-+ struct class_device *class_dev;
-+
-+ /* hwmon device name */
-+ struct device_attribute name_attr;
-+
-+ /* alarms attribute */
-+ struct ipmisensors_bmc_device_attribute alarms_attr;
-+
-+ /* update_period attribute */
-+ struct ipmisensors_bmc_device_attribute update_attr;
-+
-+ /* lower bound on time between updates (in seconds) */
-+ unsigned int update_period;
-+
-+ /* semaphore used to do a headcount of the SDR readings we are waiting
-+ * on in a given bmc update */
-+ struct semaphore update_semaphore;
-+
-+ /* bmc's work struct for updating sensors */
-+ struct delayed_work update_work;
-+
-+ /* bmc's work struct for building the sysfs workqueue */
-+ struct work_struct sysfs_work;
-+};
-diff -rduNp linux-2.6.20.3.orig/include/linux/ipmi.h linux-2.6.20.3/include/linux/ipmi.h
---- linux-2.6.20.3.orig/include/linux/ipmi.h 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/include/linux/ipmi.h 2007-03-14 14:23:02.000000000 +0100
-@@ -300,6 +300,9 @@ int ipmi_create_user(unsigned int
- safe, too. */
- int ipmi_destroy_user(ipmi_user_t user);
-
-+/* Get the IPMI BMC's device struct */
-+struct device *ipmi_get_bmcdevice(int ipmi_intf);
-+
- /* Get the IPMI version of the BMC we are talking to. */
- void ipmi_get_version(ipmi_user_t user,
- unsigned char *major,
-diff -rduNp linux-2.6.20.3.orig/include/linux/ipmi_msgdefs.h linux-2.6.20.3/include/linux/ipmi_msgdefs.h
---- linux-2.6.20.3.orig/include/linux/ipmi_msgdefs.h 2007-03-13 19:27:08.000000000 +0100
-+++ linux-2.6.20.3/include/linux/ipmi_msgdefs.h 2007-03-14 14:23:02.000000000 +0100
-@@ -45,6 +45,7 @@
-
- #define IPMI_NETFN_APP_REQUEST 0x06
- #define IPMI_NETFN_APP_RESPONSE 0x07
-+#define IPMI_GET_DEVICE_GUID_CMD 0x08
- #define IPMI_GET_DEVICE_ID_CMD 0x01
- #define IPMI_COLD_RESET_CMD 0x02
- #define IPMI_WARM_RESET_CMD 0x03
-@@ -57,6 +58,11 @@
- #define IPMI_GET_BMC_GLOBAL_ENABLES_CMD 0x2f
- #define IPMI_READ_EVENT_MSG_BUFFER_CMD 0x35
- #define IPMI_GET_CHANNEL_INFO_CMD 0x42
-+#define IPMI_RESERVE_SDR 0x22
-+#define IPMI_GET_SDR 0x23
-+#define IPMI_GET_SENSOR_STATE_READING 0x2D
-+#define IPMI_SET_SENSOR_HYSTERESIS 0x24
-+#define IPMI_SET_SENSOR_THRESHOLD 0x26
-
- #define IPMI_NETFN_STORAGE_REQUEST 0x0a
- #define IPMI_NETFN_STORAGE_RESPONSE 0x0b
-@@ -79,10 +85,13 @@
- #define IPMI_NODE_BUSY_ERR 0xc0
- #define IPMI_INVALID_COMMAND_ERR 0xc1
- #define IPMI_TIMEOUT_ERR 0xc3
-+#define IPMI_INVALID_RESERVATION_ID 0xc5
- #define IPMI_ERR_MSG_TRUNCATED 0xc6
- #define IPMI_REQ_LEN_INVALID_ERR 0xc7
- #define IPMI_REQ_LEN_EXCEEDED_ERR 0xc8
- #define IPMI_NOT_IN_MY_STATE_ERR 0xd5 /* IPMI 2.0 */
-+#define IPMI_ERR_RETURNING_REQ_BYTES 0xca
-+#define IPMI_ERR_PROVIDING_RESPONSE 0xce
- #define IPMI_LOST_ARBITRATION_ERR 0x81
- #define IPMI_BUS_ERR 0x82
- #define IPMI_NAK_ON_WRITE_ERR 0x83
+++ /dev/null
-diff -rduNp linux-2.6.22.1.oorig2/drivers/char/ipmi/ipmi_msghandler.c linux-2.6.22.1/drivers/char/ipmi/ipmi_msghandler.c
---- linux-2.6.22.1.oorig2/drivers/char/ipmi/ipmi_msghandler.c 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/drivers/char/ipmi/ipmi_msghandler.c 2007-07-24 14:22:26.000000000 +0200
-@@ -1953,6 +1953,24 @@ static void remove_proc_entries(ipmi_smi
- #endif /* CONFIG_PROC_FS */
- }
-
-+/*
-+ * Retrieves the bmc_device struct for a given ipmi interface number (or NULL if none).
-+ */
-+struct device *ipmi_get_bmcdevice(int if_num)
-+{
-+ ipmi_smi_t intf;
-+ mutex_lock(&ipmi_interfaces_mutex);
-+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
-+ if (intf->intf_num == if_num){
-+ mutex_unlock(&ipmi_interfaces_mutex);
-+ return &intf->bmc->dev->dev;
-+ }
-+ }
-+ mutex_unlock(&ipmi_interfaces_mutex);
-+
-+ return NULL;
-+}
-+
- static int __find_bmc_guid(struct device *dev, void *data)
- {
- unsigned char *id = data;
-@@ -4196,3 +4214,4 @@ EXPORT_SYMBOL(ipmi_get_my_LUN);
- EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
- EXPORT_SYMBOL(ipmi_user_set_run_to_completion);
- EXPORT_SYMBOL(ipmi_free_recv_msg);
-+EXPORT_SYMBOL(ipmi_get_bmcdevice);
-diff -rduNp linux-2.6.22.1.oorig2/drivers/hwmon/Kconfig linux-2.6.22.1/drivers/hwmon/Kconfig
---- linux-2.6.22.1.oorig2/drivers/hwmon/Kconfig 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/drivers/hwmon/Kconfig 2007-07-24 14:22:26.000000000 +0200
-@@ -248,6 +248,16 @@ config SENSORS_CORETEMP
- sensor inside your CPU. Supported all are all known variants
- of Intel Core family.
-
-+config SENSORS_IPMI
-+ tristate "IPMI Hardware Monitoring Support"
-+ depends on HWMON && IPMI_HANDLER && EXPERIMENTAL
-+ help
-+ If you say yes here you get support for sensors monitored by
-+ an IPMI baseboard management controller (BMC).
-+
-+ This driver can also be built as a module. If so, the module
-+ will be called ipmisensors.
-+
- config SENSORS_IT87
- tristate "ITE IT87xx and compatibles"
- depends on I2C
-diff -rduNp linux-2.6.22.1.oorig2/drivers/hwmon/Makefile linux-2.6.22.1/drivers/hwmon/Makefile
---- linux-2.6.22.1.oorig2/drivers/hwmon/Makefile 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/drivers/hwmon/Makefile 2007-07-24 14:22:26.000000000 +0200
-@@ -32,6 +32,7 @@ obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o
- obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
- obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
- obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
-+obj-$(CONFIG_SENSORS_IPMI) += ipmisensors.o
- obj-$(CONFIG_SENSORS_IT87) += it87.o
- obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
- obj-$(CONFIG_SENSORS_LM63) += lm63.o
-diff -rduNp linux-2.6.22.1.oorig2/drivers/hwmon/ipmisensors.c linux-2.6.22.1/drivers/hwmon/ipmisensors.c
---- linux-2.6.22.1.oorig2/drivers/hwmon/ipmisensors.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/drivers/hwmon/ipmisensors.c 2007-07-24 14:22:26.000000000 +0200
-@@ -0,0 +1,1552 @@
-+/*
-+ * ipmisensors.c - lm-sensors/hwmon interface to IPMI sensors.
-+ *
-+ * Copyright (C) 2004-2006 Yani Ioannou <yani.ioannou@gmail.com>
-+ *
-+ * Adapted from bmcsensors (lm-sensors for linux 2.4)
-+ * bmcsensors (C) Mark D. Studebaker <mdsxyz123@yahoo.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ */
-+
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/param.h>
-+#include <linux/hwmon.h>
-+#include <linux/list.h>
-+#include <linux/slab.h>
-+#include <linux/device.h>
-+#include <linux/hwmon.h>
-+
-+#include "ipmisensors.h"
-+
-+/****** Function Prototypes ******/
-+static void ipmisensors_send_message(struct ipmisensors_bmc_data *bmc,
-+ long msgid, struct kernel_ipmi_msg *msg);
-+static void ipmisensors_reserve_sdr(struct ipmisensors_bmc_data *bmc);
-+static void ipmisensors_get_sdr(struct ipmisensors_bmc_data *bmc, u16 res_id,
-+ u16 record, u8 offset);
-+static void ipmisensors_set_sensor_threshold(struct ipmisensors_bmc_data *bmc,
-+ u8 number, int value,
-+ int lim_index);
-+static void ipmisensors_get_reading(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr);
-+static void ipmisensors_msg_handler(struct ipmi_recv_msg *msg,
-+ void *user_msg_data);
-+static int ipmisensors_intf_registered(int ipmi_intf);
-+static int ipmisensors_bmc_registered(struct device *bmc);
-+static void ipmisensors_register_bmc(int ipmi_intf, struct ipmi_addr *address);
-+static void ipmisensors_unregister_bmc(int ipmi_intf);
-+static void ipmisensors_unregister_bmc_all(void);
-+static void ipmisensors_new_smi(int if_num, struct device *dev);
-+static void ipmisensors_smi_gone(int if_num);
-+static void ipmisensors_update_bmc(struct work_struct *);
-+static void ipmisensors_cleanup(void);
-+
-+/****** Static Vars ******/
-+
-+/* set when module is being removed */
-+static int cleanup = 0;
-+
-+/* ipmisensors driver data */
-+static struct ipmisensors_data driver_data = {
-+ .driver_name = "bmc",
-+ .bmc_data = LIST_HEAD_INIT(driver_data.bmc_data),
-+ .interfaces = 0,
-+ .smi_watcher = {
-+ .owner = THIS_MODULE,
-+ .new_smi = ipmisensors_new_smi,
-+ .smi_gone = ipmisensors_smi_gone,
-+ },
-+ .ipmi_hndlrs = {
-+ .ipmi_recv_hndl = ipmisensors_msg_handler,
-+ },
-+};
-+
-+/* sensor refresh workqueue */
-+static struct workqueue_struct *ipmisensors_workqueue;
-+
-+/****** SDR List Functions ******/
-+/**
-+ * Creates a new sdrdata struct, or returns NULL if insufficient memory.
-+ */
-+static struct sdrdata *ipmisensors_new_sdr(void)
-+{
-+ struct sdrdata *sdr;
-+
-+ sdr = kmem_cache_alloc(driver_data.sdrdata_cache, GFP_ATOMIC);
-+ if (sdr) {
-+ memset(sdr, 0, sizeof(struct sdrdata));
-+ } else {
-+ printk(KERN_ERR
-+ "ipmisensors: Couldn't allocate memory for new SDR\n");
-+ }
-+
-+ return sdr;
-+}
-+
-+/**
-+ * Adds the given sdrdata struct to the given bmc's SDR list.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static inline void ipmisensors_add_sdr(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr)
-+{
-+ list_add(&sdr->list, &bmc->sdrs);
-+ printk(KERN_DEBUG
-+ "ipmisensors: SDR %d: type 0x%02x (%s)\n",
-+ bmc->sdr_count, sdr->stype, sdr->id);
-+ bmc->sdr_count++;
-+}
-+
-+/**
-+ * Cleanup the sdr list for the given BMC.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static void ipmisensors_sdr_cleanup(struct ipmisensors_bmc_data *bmc)
-+{
-+ struct sdrdata *cursor, *next;
-+
-+ /* find and free each sdr data struct */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ device_remove_file(bmc->dev, &cursor->attr.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_min.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_max.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_label.dev_attr);
-+
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+
-+ list_del(&cursor->list);
-+ kmem_cache_free(driver_data.sdrdata_cache, cursor);
-+ }
-+}
-+
-+/* worker function for workqueue ipmisensors_workqueue */
-+static void ipmisensors_update_bmc(struct work_struct *work)
-+{
-+ struct ipmisensors_bmc_data *bmc = container_of(work, struct ipmisensors_bmc_data, update_work.work);
-+
-+ /* don't start an update cycle if one already in progress */
-+ if (bmc->state != STATE_READING) {
-+ struct sdrdata *cursor, *next;
-+ bmc->state = STATE_READING;
-+ printk(KERN_DEBUG "ipmisensors: starting update\n");
-+
-+ /* init semaphore to 1 for update cycle */
-+ sema_init(&bmc->update_semaphore, 1);
-+
-+ /* update each sdr reading */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ ipmisensors_get_reading(bmc, cursor);
-+ }
-+ }
-+
-+ /* wait for readings (need timeout?) */
-+ down_interruptible(&bmc->update_semaphore);
-+
-+ printk(KERN_DEBUG "ipmisensors: update complete\n");
-+
-+ bmc->state = STATE_DONE;
-+
-+ /* if the module isn't cleaning up, schedule another update */
-+ if (!cleanup)
-+ queue_delayed_work(ipmisensors_workqueue, &bmc->update_work,
-+ bmc->update_period * HZ);
-+}
-+
-+/****** IPMI Message Sending ******/
-+
-+/**
-+ * Send a message to the IPMI BMC
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @msgid: the message id to use.
-+ * @msg: the ipmi message structure.
-+ */
-+static void ipmisensors_send_message(struct ipmisensors_bmc_data *bmc,
-+ long msgid, struct kernel_ipmi_msg *msg)
-+{
-+ if (msg->data == NULL)
-+ printk(KERN_DEBUG "ipmisensors: Send 0x%x\n", msg->cmd);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: Send 0x%x 0x%x 0x%x\n",
-+ msg->cmd, msg->data[0], msg->data[1]);
-+
-+ /* This should be ipmi_request, but Corey had to remove
-+ * that due to it being unused at the moment, as soon as
-+ * this makes it into the kernel we should request it be re-instated.
-+ */
-+ ipmi_request_settime(bmc->user, &bmc->address, msgid, msg, bmc, 0,
-+ -1, 0);
-+}
-+
-+/**
-+ * Compose and send a "reserve SDR" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static void ipmisensors_reserve_sdr(struct ipmisensors_bmc_data *bmc)
-+{
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_RESERVE_SDR;
-+ bmc->tx_message.data_len = 0;
-+ bmc->tx_message.data = NULL;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Componse and send a "get SDR" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @res_id:
-+ * @record:
-+ * @offset:
-+ */
-+static void ipmisensors_get_sdr(struct ipmisensors_bmc_data *bmc, u16 res_id,
-+ u16 record, u8 offset)
-+{
-+ printk(KERN_DEBUG "ipmisensors: Get SDR 0x%x 0x%x 0x%x\n",
-+ res_id, record, offset);
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_GET_SDR;
-+ bmc->tx_message.data_len = 6;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = res_id & 0xff;
-+ bmc->tx_msg_data[1] = res_id >> 8;
-+ bmc->tx_msg_data[2] = record & 0xff;
-+ bmc->tx_msg_data[3] = record >> 8;
-+ bmc->tx_msg_data[4] = offset;
-+ bmc->tx_msg_data[5] = bmc->ipmi_sdr_partial_size;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Compose and send a "set sensor threshold" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @id: the ipmi id number of the sensor.
-+ * @value: the new value for the threshold.
-+ * @lim_index: the index in the lim[] array for which this value applies.
-+ */
-+static void ipmisensors_set_sensor_threshold(struct ipmisensors_bmc_data *bmc,
-+ u8 number, int value,
-+ int lim_index)
-+{
-+ int i;
-+
-+ printk(KERN_DEBUG "ipmisensors: Set SDR Threshold %d %d %d\n",
-+ number, value, lim_index);
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_SET_SENSOR_THRESHOLD;
-+ bmc->tx_message.data_len = 8;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = number & 0xff;
-+ bmc->tx_msg_data[1] = 0x01 << lim_index;
-+
-+ if (lim_index > 5 || lim_index < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Error - ipmisensors_set_sensor_threshold given invalid lim_index\n");
-+ return;
-+ }
-+
-+ for (i = 2; i < 8; i++)
-+ bmc->tx_msg_data[i] = 0x00;
-+
-+ bmc->tx_msg_data[lim_index] = value && 0xff;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Compose and send a "get sensor reading" message for the given sdr.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @sdr: the sdr of the sensor to get the reading for.
-+ */
-+static void ipmisensors_get_reading(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr)
-+{
-+ bmc->tx_message.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
-+ bmc->tx_message.cmd = IPMI_GET_SENSOR_STATE_READING;
-+ bmc->tx_message.data_len = 1;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = sdr->number;
-+ bmc->current_sdr = sdr;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+ down_interruptible(&bmc->update_semaphore);
-+}
-+
-+/****** IPMI Message Receiving ******/
-+
-+/**
-+ * Process an sensor reading response message.
-+ *
-+ * @bmc: the bmc the message is from
-+ * @msg: the IPMI SDR response message
-+ */
-+static void ipmisensors_rcv_reading_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ struct sdrdata *sdr = bmc->current_sdr;
-+
-+ if (sdr == NULL) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error ipmisensors_rcv_reading with NULL sdr\n");
-+ return;
-+ }
-+
-+ sdr->reading = msg->data[1];
-+ sdr->status = msg->data[2];
-+ sdr->thresholds = msg->data[3];
-+
-+ printk(KERN_DEBUG "ipmisensors: sensor %d (type %d) reading %d\n",
-+ sdr->number, sdr->stype, msg->data[1]);
-+
-+ up(&bmc->update_semaphore);
-+}
-+
-+/**
-+ * Unpack based on string type, convert to normal, null terminate.
-+ */
-+static void ipmisensors_sprintf(u8 * to, u8 * from, u8 type, u8 length)
-+{
-+ static const u8 *bcdplus = "0123456789 -.:,_";
-+ int i;
-+
-+ switch (type) {
-+ case 0: /* unicode */
-+ for (i = 0; i < length; i++)
-+ *to++ = (*from++ & 0x7f);
-+ *to = 0;
-+ break;
-+ case 1: /* BCD Plus */
-+ for (i = 0; i < length; i++)
-+ *to++ = bcdplus[*from++ & 0x0f];
-+ *to = 0;
-+ break;
-+ case 2: /* packed ascii *//* if not a mult. of 3 this will run over */
-+ for (i = 0; i < length; i += 3) {
-+ *to++ = *from & 0x3f;
-+ *to++ = *from >> 6 | ((*(from+1) & 0xf) << 2);
-+ from++;
-+ *to++ = *from >> 4 | ((*(from+1) & 0x3) << 4);
-+ from++;
-+ *to++ = (*from++ >> 2) & 0x3f;
-+ }
-+ *to = 0;
-+ break;
-+ case 3: /* normal */
-+ if (length > 1)
-+ memcpy(to, from, length);
-+ to[length] = 0;
-+ break;
-+ }
-+}
-+
-+/* IPMI V1.5 Section 30 */
-+static const int exps[] =
-+ { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 };
-+
-+/* Return 0 for fan, 2 for temp, 3 for voltage
-+ We could make it variable based on the accuracy (= log10(m * 10**k2));
-+ this would work for /proc output, however libsensors resolution
-+ is statically set in lib/chips.c */
-+static int decplaces(struct sdrdata *sd)
-+{
-+ switch (sd->stype) {
-+ case STYPE_TEMP:
-+ return 2;
-+ case STYPE_CURR:
-+ case STYPE_VOLT:
-+ return 3;
-+ case STYPE_FAN:
-+ default:
-+ return 0;
-+ }
-+}
-+
-+/* convert a raw value to a reading. IMPI V1.5 Section 30 */
-+static long conv_val(int value, struct sdrdata *sd)
-+{
-+ u8 k1, k2;
-+ long r;
-+
-+ r = value * sd->m;
-+ k1 = sd->k & 0x0f;
-+ k2 = sd->k >> 4;
-+ if (k1 < 8)
-+ r += sd->b * exps[k1];
-+ else
-+ r += sd->b / exps[16 - k1];
-+ r *= exps[decplaces(sd)];
-+ if (k2 < 8) {
-+ if (sd->linear != 7)
-+ r *= exps[k2];
-+ else
-+ /* this will always truncate to 0: r = 1 / (exps[k2] * r); */
-+ r = 0;
-+ } else {
-+ if (sd->linear != 7)
-+ r /= exps[16 - k2];
-+ else {
-+ if (r != 0)
-+ /* 1 / x * 10 ** (-m) == 10 ** m / x */
-+ r = exps[16 - k2] / r;
-+ else
-+ r = 0;
-+ }
-+ }
-+
-+ return r;
-+}
-+
-+static const char *threshold_text[] = {
-+ "upper non-recoverable threshold",
-+ "upper critical threshold",
-+ "upper non-critical threshold",
-+ "lower non-recoverable threshold",
-+ "lower critical threshold",
-+ "lower non-critical threshold",
-+ "positive-going hysteresis",
-+ "negative-going hysteresis" /* unused */
-+};
-+
-+/* select two out of the 8 possible readable thresholds, and place indexes into the limits
-+ array into lim1 and lim2. Set writable flags */
-+static void ipmisensors_select_thresholds(struct sdrdata *sd)
-+{
-+ u8 capab = sd->capab;
-+ u16 mask = sd->thresh_mask;
-+ int tmp;
-+
-+ sd->lim1 = -1;
-+ sd->lim2 = -1;
-+ sd->lim1_write = 0;
-+ sd->lim2_write = 0;
-+
-+ if (((capab & 0x0c) == 0x04) || /* readable thresholds ? */
-+ ((capab & 0x0c) == 0x08)) {
-+ /* select upper threshold */
-+ if (mask & 0x10) { /* upper crit */
-+ sd->lim1 = 1;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x1000))
-+ sd->lim1_write = 1;
-+ } else if (mask & 0x20) { /* upper non-recov */
-+ sd->lim1 = 0;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x2000))
-+ sd->lim1_write = 1;
-+ } else if (mask & 0x08) { /* upper non-crit */
-+ sd->lim1 = 2;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0800))
-+ sd->lim1_write = 1;
-+ }
-+
-+ /* select lower threshold */
-+ if ((((capab & 0x30) == 0x10) || /* readable ? */
-+ ((capab & 0x30) == 0x20)) && /* pos hyst */
-+ sd->stype == STYPE_TEMP)
-+ sd->lim2 = 6;
-+ else if (mask & 0x02) { /* lower crit */
-+ sd->lim2 = 4;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0200))
-+ sd->lim2_write = 1;
-+ } else if (mask & 0x04) { /* lower non-recov */
-+ sd->lim2 = 3;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0400))
-+ sd->lim2_write = 1;
-+ } else if (mask & 0x01) { /* lower non-crit */
-+ sd->lim2 = 5;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0100))
-+ sd->lim2_write = 1;
-+ }
-+ }
-+
-+ /* swap lim1/lim2 if m < 0 or function is 1/x (but not both!) */
-+ if ((sd->m < 0 && sd->linear != 7) || (sd->m >= 0 && sd->linear == 7)) {
-+ tmp = sd->lim1;
-+ sd->lim1 = sd->lim2;
-+ sd->lim2 = tmp;
-+ }
-+
-+ if (sd->lim1 >= 0)
-+ printk(KERN_INFO "ipmisensors: using %s for upper limit\n",
-+ threshold_text[sd->lim1]);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: no readable upper limit\n");
-+
-+ if (sd->lim2 >= 0)
-+ printk(KERN_INFO "ipmisensors: using %s for lower limit\n",
-+ threshold_text[sd->lim2]);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: no readable lower limit\n");
-+}
-+
-+/************* sysfs callback functions *********/
-+static ssize_t show_update_period(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+
-+ return snprintf(buf, 20, "%d\n", aattr->bmc->update_period);
-+}
-+
-+static ssize_t store_update_period(struct device *dev,
-+ struct device_attribute *attr,
-+ const char *buf, size_t count)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+
-+ aattr->bmc->update_period = simple_strtoul(buf, NULL, 10);;
-+ return count;
-+};
-+
-+static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ return snprintf(buf, 20, "%ld\n",
-+ conv_val(sattr->sdr->reading, sattr->sdr));
-+}
-+
-+static ssize_t show_sensor_max(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ long max = 0;
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ if (sattr->sdr->lim1 >= 0)
-+ max = conv_val(sattr->sdr->limits[sattr->sdr->lim1],
-+ sattr->sdr);
-+ return snprintf(buf, 20, "%ld\n", max);
-+}
-+
-+static ssize_t show_sensor_min(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ long min = 0;
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ if (sattr->sdr->lim2 >= 0)
-+ min = conv_val(sattr->sdr->limits[sattr->sdr->lim2],
-+ sattr->sdr);
-+ return snprintf(buf, 20, "%ld\n", min);
-+};
-+
-+static ssize_t show_sensor_label(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ u8 label[SDR_MAX_UNPACKED_ID_LENGTH];
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ ipmisensors_sprintf(label, sattr->sdr->id, sattr->sdr->string_type,
-+ sattr->sdr->id_length);
-+ return snprintf(buf, 20, "%s\n", label);
-+};
-+
-+static ssize_t store_sensor_max(struct device *dev,
-+ struct device_attribute *attr, const char *buf,
-+ size_t count)
-+{
-+ long val = simple_strtoul(buf, NULL, 10);
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ printk(KERN_DEBUG "ipmisensors: set max on sensor #%d to %ld",
-+ sattr->sdr->number, val);
-+ ipmisensors_set_sensor_threshold(sattr->sdr->bmc, sattr->sdr->number,
-+ val, sattr->sdr->lim1);
-+ return count;
-+};
-+
-+static ssize_t store_sensor_min(struct device *dev,
-+ struct device_attribute *attr, const char *buf,
-+ size_t count)
-+{
-+ long val = simple_strtoul(buf, NULL, 10);
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ printk(KERN_DEBUG "ipmisensors: set min on sensor #%d to %ld",
-+ sattr->sdr->number, val);
-+ ipmisensors_set_sensor_threshold(sattr->sdr->bmc, sattr->sdr->number,
-+ val, sattr->sdr->lim2);
-+ return count;
-+};
-+
-+static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+ return snprintf(buf, 20, "%d\n", aattr->bmc->alarms);
-+};
-+
-+static ssize_t show_name(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ return snprintf(buf, 20, "%s\n", driver_data.driver_name);
-+};
-+
-+/* work function to build the sysfs entries using the ipmi sdrs */
-+static void ipmisensors_build_sysfs(struct work_struct *work)
-+{
-+ int temps = 0, volts = 0, currs = 0, fans = 0;
-+ struct sdrdata *cursor, *next;
-+ struct ipmisensors_bmc_data *bmc = container_of(work, struct ipmisensors_bmc_data, sysfs_work);
-+
-+ /* find and create entries for each sdr data struct */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ u8 id[SDR_MAX_UNPACKED_ID_LENGTH];
-+
-+ cursor->attr_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+ cursor->attr_max_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+ cursor->attr_min_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+
-+ if (cursor->id_length > 0) {
-+ cursor->attr_label_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+
-+ if (cursor->attr_label_name == NULL) {
-+ printk(KERN_INFO
-+ "ipmisensors: Out of memory (kmalloc failed)");
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ return;
-+ }
-+ }
-+
-+ if (cursor->attr_name == NULL || cursor->attr_max_name == NULL
-+ || cursor->attr_min_name == NULL
-+ || cursor->attr_label_name == NULL) {
-+ printk(KERN_INFO
-+ "ipmisensors: Out of memory (kmalloc failed)");
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+ return;
-+ }
-+
-+ switch (cursor->stype) {
-+ case (STYPE_TEMP):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "temp%d_input", ++temps);
-+ /* create min, max attributes */
-+ snprintf(cursor->attr_max_name, MAX_FILENAME_LENGTH,
-+ "temp%d_max", temps);
-+ snprintf(cursor->attr_min_name, MAX_FILENAME_LENGTH,
-+ "temp%d_min", temps);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "temp%d_label", temps);
-+ break;
-+ case (STYPE_VOLT):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "in%d_input", ++volts);
-+ /* create min, max attributes */
-+ snprintf(cursor->attr_max_name, MAX_FILENAME_LENGTH,
-+ "in%d_max", volts);
-+ snprintf(cursor->attr_min_name, MAX_FILENAME_LENGTH,
-+ "in%d_min", volts);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "in%d_label", volts);
-+ break;
-+ case (STYPE_CURR):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "curr%d_input", ++currs);
-+ /* create min, max attributes */
-+ sprintf(cursor->attr_max_name, "curr%d_max", currs);
-+ sprintf(cursor->attr_min_name, "curr%d_min", currs);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "curr%d_label", currs);
-+ break;
-+ case (STYPE_FAN):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "fan%d_input", ++fans);
-+ /* create min, max attributes */
-+ sprintf(cursor->attr_max_name, "fan%d_max", fans);
-+ sprintf(cursor->attr_min_name, "fan%d_min", fans);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "fan%d_label", fans);
-+ break;
-+ default:
-+ printk(KERN_INFO "ipmisensors: unkown sensor type\n");
-+ continue;
-+ }
-+
-+ cursor->attr.dev_attr.attr.name = cursor->attr_name;
-+ cursor->attr.dev_attr.attr.mode = S_IRUGO;
-+ cursor->attr.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr.dev_attr.show = show_sensor;
-+ cursor->attr.dev_attr.store = NULL;
-+ cursor->attr.sdr = cursor;
-+
-+ cursor->attr_min.dev_attr.attr.name = cursor->attr_min_name;
-+ cursor->attr_min.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_min.dev_attr.show = show_sensor_min;
-+ cursor->attr_min.sdr = cursor;
-+
-+ if (cursor->lim2_write) {
-+ printk(KERN_INFO
-+ "ipmisensors: You have a writable sensor threshold! Send me an e-mail at <yani.ioannou@gmail.com>.\n");
-+ cursor->attr_min.dev_attr.store = store_sensor_min;
-+ cursor->attr_min.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ } else {
-+ cursor->attr_min.dev_attr.store = NULL;
-+ cursor->attr_min.dev_attr.attr.mode = S_IRUGO;
-+ }
-+
-+ cursor->attr_max.dev_attr.attr.name = cursor->attr_max_name;
-+ cursor->attr_max.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_max.dev_attr.show = show_sensor_max;
-+ cursor->attr_max.sdr = cursor;
-+
-+ if (cursor->lim1_write) {
-+ printk(KERN_INFO
-+ "ipmisensors: You have a writable sensor threshold! Send me an e-mail at <yani.ioannou@gmail.com>.\n");
-+ cursor->attr_max.dev_attr.store = store_sensor_max;
-+ cursor->attr_max.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ } else {
-+ cursor->attr_max.dev_attr.store = NULL;
-+ cursor->attr_max.dev_attr.attr.mode = S_IRUGO;
-+ }
-+
-+ if (cursor->id_length > 0) {
-+ cursor->attr_label.dev_attr.attr.name =
-+ cursor->attr_label_name;
-+ cursor->attr_label.dev_attr.attr.mode = S_IRUGO;
-+ cursor->attr_label.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_label.dev_attr.show = show_sensor_label;
-+ cursor->attr_label.dev_attr.store = NULL;
-+ cursor->attr_label.sdr = cursor;
-+ }
-+
-+ printk(KERN_INFO
-+ "ipmisensors: registering sensor %d: (type 0x%.2x) "
-+ "(fmt=%d; m=%d; b=%d; k1=%d; k2=%d; cap=0x%.2x; mask=0x%.4x)\n",
-+ cursor->number, cursor->stype, cursor->format, cursor->m,
-+ cursor->b, cursor->k & 0xf, cursor->k >> 4,
-+ cursor->capab, cursor->thresh_mask);
-+
-+ if (cursor->id_length > 0) {
-+ ipmisensors_sprintf(id, cursor->id, cursor->string_type,
-+ cursor->id_length);
-+ switch (cursor->stype) {
-+ case (STYPE_TEMP):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label temp%d \"%s\"\n",
-+ temps, id);
-+ break;
-+ case (STYPE_VOLT):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label in%d \"%s\"\n",
-+ volts, id);
-+ break;
-+ case (STYPE_CURR):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label curr%d \"%s\"\n",
-+ currs, id);
-+ break;
-+ case (STYPE_FAN):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label fan%d \"%s\"\n",
-+ fans, id);
-+ break;
-+ }
-+ }
-+
-+ ipmisensors_select_thresholds(cursor);
-+
-+ if (cursor->linear != 0 && cursor->linear != 7) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: nonlinear function 0x%.2x unsupported, expect bad results\n",
-+ cursor->number, cursor->linear);
-+ }
-+
-+ if ((cursor->format & 0x03) == 0x02) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: 1's complement format unsupported, expect bad results\n",
-+ cursor->number);
-+ } else if ((cursor->format & 0x03) == 0x03) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: threshold sensor only, no readings available",
-+ cursor->number);
-+ }
-+
-+ if (cursor->lim1_write || cursor->lim2_write)
-+ cursor->attr.dev_attr.attr.mode = 0644;
-+ else
-+ cursor->attr.dev_attr.attr.mode = 0444;
-+
-+ if (device_create_file(bmc->dev, &cursor->attr.dev_attr) < 0
-+ || device_create_file(bmc->dev,
-+ &cursor->attr_min.dev_attr) < 0
-+ || device_create_file(bmc->dev,
-+ &cursor->attr_max.dev_attr) < 0
-+ || (cursor->id_length >
-+ 0 ? device_create_file(bmc->dev,
-+ &cursor->attr_label.dev_attr) <
-+ 0 : 0)
-+ ) {
-+ printk(KERN_INFO
-+ "ipmisensors: sysfs file creation failed for SDR %d (%s).\n",
-+ cursor->number, cursor->id);
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+ return;
-+ }
-+ }
-+
-+ bmc->alarms_attr.dev_attr.attr.name = "alarms";
-+ bmc->alarms_attr.dev_attr.attr.mode = S_IRUGO;
-+ bmc->alarms_attr.dev_attr.attr.owner = THIS_MODULE;
-+ bmc->alarms_attr.dev_attr.show = show_alarms;
-+ bmc->alarms_attr.dev_attr.store = NULL;
-+ bmc->alarms_attr.bmc = bmc;
-+
-+ if (device_create_file(bmc->dev, &bmc->alarms_attr.dev_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'alarms'");
-+ return;
-+ }
-+
-+ bmc->name_attr.attr.name = "name";
-+ bmc->name_attr.attr.mode = S_IRUGO;
-+ bmc->name_attr.attr.owner = THIS_MODULE;
-+ bmc->name_attr.show = show_name;
-+
-+ if (device_create_file(bmc->dev, &bmc->name_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'name'");
-+ return;
-+ }
-+
-+ bmc->update_attr.dev_attr.attr.name = "update_period";
-+ bmc->update_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ bmc->update_attr.dev_attr.attr.owner = THIS_MODULE;
-+ bmc->update_attr.dev_attr.show = show_update_period;
-+ bmc->update_attr.dev_attr.store = store_update_period;
-+ bmc->update_attr.bmc = bmc;
-+
-+ if (device_create_file(bmc->dev, &bmc->update_attr.dev_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'update_period'");
-+ return;
-+ }
-+
-+ printk(KERN_INFO
-+ "ipmisensors: registered %d temp, %d volt, %d current, %d fan sensors\n",
-+ temps, volts, currs, fans);
-+
-+ /* This completes the initialization. We can now kickoff the
-+ * periodic update of the bmc sensor's values by scheduling
-+ * the first work.
-+ */
-+ queue_work(ipmisensors_workqueue, &bmc->update_work.work);
-+
-+}
-+
-+/**
-+ * Process an SDR response message, save the SDRs we like in the sdr
-+ * list for the given BMC.
-+ *
-+ * @bmc: the bmc the message is from
-+ * @msg: the IPMI SDR response message
-+ */
-+static void ipmisensors_rcv_sdr_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ u16 record;
-+ int type;
-+ int stype;
-+ int id_length;
-+ int i;
-+ int ipmi_ver = 0;
-+ unsigned char *data;
-+ u8 id[SDR_MAX_UNPACKED_ID_LENGTH];
-+ struct sdrdata *sdr;
-+
-+ if (msg->data[0] != 0) {
-+ /* cut request in half and try again */
-+ bmc->ipmi_sdr_partial_size /= 2;
-+ if (bmc->ipmi_sdr_partial_size < 8) {
-+ printk(KERN_INFO
-+ "ipmisensors: IPMI buffers too small, giving up\n");
-+ bmc->state = STATE_DONE;
-+ return;
-+ }
-+ printk(KERN_DEBUG
-+ "ipmisensors: Reducing SDR request size to %d\n",
-+ bmc->ipmi_sdr_partial_size);
-+
-+ ipmisensors_get_sdr(bmc, 0, 0, 0);
-+ bmc->state = STATE_SDR;
-+ return;
-+ }
-+ if (bmc->ipmi_sdr_partial_size < IPMI_SDR_SIZE) {
-+ if (bmc->rx_msg_data_offset == 0) {
-+ memcpy(bmc->rx_msg_data, msg->data,
-+ bmc->ipmi_sdr_partial_size + 3);
-+ bmc->rx_msg_data_offset =
-+ bmc->ipmi_sdr_partial_size + 3;
-+ } else {
-+ memcpy(bmc->rx_msg_data + bmc->rx_msg_data_offset,
-+ msg->data + 3, bmc->ipmi_sdr_partial_size);
-+ bmc->rx_msg_data_offset += bmc->ipmi_sdr_partial_size;
-+ }
-+ if (bmc->rx_msg_data_offset > bmc->rx_msg_data[7] + 7) {
-+ /* got last chunk */
-+ bmc->rx_msg_data_offset = 0;
-+ data = bmc->rx_msg_data;
-+ } else {
-+ /* get more */
-+ record =
-+ (bmc->rx_msg_data[4] << 8) | bmc->rx_msg_data[3];
-+ ipmisensors_get_sdr(bmc, bmc->resid, record,
-+ bmc->rx_msg_data_offset - 3);
-+ bmc->state = STATE_SDR;
-+ return;
-+ }
-+ } else {
-+ /* got it in one chunk */
-+ data = msg->data;
-+ }
-+
-+ bmc->nextrecord = (data[2] << 8) | data[1];
-+
-+ /* If the ipmi version is 0.9 we have to remap some things.
-+ * Yes this is very ugly, but we aren't the ones who
-+ * implemented an incomplete spec!
-+ */
-+ ipmi_ver = data[5];
-+
-+ type = data[6];
-+ /* known SDR type */
-+ if (type == 1 || type == 2) {
-+ stype = data[(ipmi_ver == 0x90 ? 16 : 15)];
-+ /* known sensor type */
-+ if (stype <= STYPE_MAX) {
-+ if (data[(ipmi_ver == 0x90 ? 17 : 16)] != 0x01) {
-+ if (type == 1)
-+ ipmisensors_sprintf(id, &data[51],
-+ data[50] >> 6,
-+ data[50] & 0x1f);
-+ else
-+ ipmisensors_sprintf(id,
-+ &data[(ipmi_ver ==
-+ 0x90 ? 30 :
-+ 35)],
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 :
-+ 34)] >> 6,
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 :
-+ 34)] & 0x1f);
-+ printk(KERN_INFO
-+ "ipmisensors: skipping non-threshold sensor \"%s\"\n",
-+ id);
-+ } else {
-+ /* add entry to sdrd table */
-+ sdr = ipmisensors_new_sdr();
-+ if (!sdr) {
-+ printk(KERN_ERR
-+ "ipmisensors: could not allocate memory for new SDR");
-+ return;
-+ }
-+ sdr->bmc = bmc;
-+ sdr->stype = stype;
-+ sdr->number = data[10];
-+ sdr->capab = data[(ipmi_ver == 0x90 ? 15 : 14)];
-+ sdr->thresh_mask =
-+ (((u16) data[(ipmi_ver == 0x90 ? 21 : 22)])
-+ << 8) | data[21];
-+ if (type == 1) {
-+ sdr->format =
-+ data[(ipmi_ver ==
-+ 0x90 ? 22 : 24)] >> 6;
-+ sdr->linear =
-+ data[(ipmi_ver ==
-+ 0x90 ? 25 : 26)] & 0x7f;
-+ sdr->m =
-+ data[(ipmi_ver == 0x90 ? 26 : 27)];
-+ sdr->m |= ((u16)
-+ (data
-+ [(ipmi_ver ==
-+ 0x90 ? 27 : 28)]
-+ & 0xc0)) << 2;
-+ if (sdr->m & 0x0200) {
-+ /* sign extend */
-+ sdr->m |= 0xfc00;
-+ }
-+ sdr->b =
-+ data[(ipmi_ver == 0x90 ? 28 : 29)];
-+ sdr->b |= ((u16)
-+ (data
-+ [(ipmi_ver ==
-+ 0x90 ? 29 : 30)]
-+ & 0xc0)) << 2;
-+ if (sdr->b & 0x0200) {
-+ /* sign extend */
-+ sdr->b |= 0xfc00;
-+ }
-+ sdr->k =
-+ data[(ipmi_ver == 0x90 ? 31 : 32)];
-+ sdr->nominal =
-+ data[(ipmi_ver == 0x90 ? 33 : 34)];
-+ for (i = 0; i < SDR_LIMITS; i++) {
-+ /* assume readable */
-+ sdr->limits[i] =
-+ data[(ipmi_ver ==
-+ 0x90 ? 40 : 39) + i];
-+ }
-+ sdr->string_type = data[50] >> 6;
-+ id_length = data[50] & 0x1f;
-+ memcpy(sdr->id, &data[51], id_length);
-+ sdr->id_length = id_length;
-+ } else {
-+ sdr->m = 1;
-+ sdr->b = 0;
-+ sdr->k = 0;
-+ sdr->string_type =
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 : 34)] >> 6;
-+ id_length = data[34] & 0x1f;
-+ if (id_length > 0) {
-+ memcpy(sdr->id,
-+ &data[(ipmi_ver ==
-+ 0x90 ? 30 : 35)],
-+ id_length);
-+ }
-+ sdr->id_length = id_length;
-+ /* limits?? */
-+ if (ipmi_ver == 0x90) {
-+ memcpy(sdr->id,
-+ &data[30], id_length);
-+ sdr->id_length = id_length;
-+ }
-+ }
-+ ipmisensors_add_sdr(bmc, sdr);
-+ }
-+ }
-+ /* peek at the other SDR types */
-+ } else if (type == 0x10 || type == 0x11 || type == 0x12) {
-+ ipmisensors_sprintf(id, data + 19, data[18] >> 6,
-+ data[18] & 0x1f);
-+ if (type == 0x10) {
-+ printk(KERN_INFO
-+ "ipmisensors: Generic Device acc=0x%x; slv=0x%x; lun=0x%x; type=0x%x; \"%s\"\n",
-+ data[8], data[9], data[10], data[13], id);
-+ } else if (type == 0x11) {
-+ printk(KERN_INFO
-+ "ipmisensors: FRU Device acc=0x%x; slv=0x%x; log=0x%x; ch=0x%x; type=0x%x; \"%s\"\n",
-+ data[8], data[9], data[10], data[11], data[13],
-+ id);
-+ } else {
-+ printk(KERN_INFO
-+ "ipmisensors: Mgmt Ctllr Device slv=0x%x; \"%s\"\n",
-+ data[8], id);
-+ }
-+ } else if (type == 0x14) {
-+ printk(KERN_INFO
-+ "ipmisensors: Message Channel Info Records:\n");
-+ for (i = 0; i < 8; i++) {
-+ printk(KERN_INFO "ipmisensors: Channel %d info 0x%x\n",
-+ i, data[9 + i]);
-+ }
-+ } else {
-+ printk(KERN_INFO "ipmisensors: Skipping SDR type 0x%x\n", type);
-+ }
-+ if (ipmi_ver != 0x90) {
-+ if (bmc->nextrecord >= 6224) {
-+ /*YJ stop sensor scan on poweredge 1750 */
-+ bmc->nextrecord = 0xffff;
-+ }
-+ }
-+
-+ if (bmc->nextrecord == 0xFFFF) {
-+ if (bmc->sdr_count == 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: No recognized sensors found.\n");
-+ bmc->state = STATE_DONE;
-+ } else {
-+ printk(KERN_INFO "ipmisensors: all sensors detected\n");
-+ bmc->state = STATE_SYSTABLE;
-+
-+ /* Schedule sysfs build/registration work */
-+ INIT_WORK(&bmc->sysfs_work, ipmisensors_build_sysfs);
-+ queue_work(ipmisensors_workqueue, &bmc->sysfs_work);
-+ }
-+ } else {
-+ ipmisensors_get_sdr(bmc, 0, bmc->nextrecord, 0);
-+ bmc->state = STATE_SDR;
-+ }
-+}
-+
-+/**
-+ * Process incoming messages based on internal state
-+ *
-+ * @bmc: the bmc the message is from.
-+ * @msg: the ipmi message to process.
-+ */
-+static void ipmisensors_rcv_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ switch (bmc->state) {
-+ case STATE_INIT:
-+ case STATE_RESERVE:
-+ bmc->resid = (((u16) msg->data[2]) << 8) | msg->data[1];
-+
-+ printk(KERN_DEBUG "ipmisensors: Got first resid 0x%.4x\n",
-+ bmc->resid);
-+
-+ ipmisensors_get_sdr(bmc, 0, 0, 0);
-+ bmc->state = STATE_SDR;
-+ break;
-+
-+ case STATE_SDR:
-+ case STATE_SDRPARTIAL:
-+ ipmisensors_rcv_sdr_msg(bmc, msg);
-+ break;
-+
-+ case STATE_READING:
-+ ipmisensors_rcv_reading_msg(bmc, msg);
-+ break;
-+
-+ case STATE_UNCANCEL:
-+ bmc->resid = (((u16) msg->data[2]) << 8) | msg->data[1];
-+
-+ printk(KERN_DEBUG "ipmisensors: Got new resid 0x%.4x\n",
-+ bmc->resid);
-+
-+ bmc->rx_msg_data_offset = 0;
-+ ipmisensors_get_sdr(bmc, 0, bmc->nextrecord, 0);
-+ bmc->state = STATE_SDR;
-+ break;
-+
-+ case STATE_DONE:
-+ case STATE_SYSTABLE:
-+ break;
-+ default:
-+ bmc->state = STATE_INIT;
-+ }
-+}
-+
-+/**
-+ * Callback to handle a received IPMI message from a given BMC.
-+ *
-+ * @msg: the received message.
-+ * @handler_data: a pointer to the particular bmc ipmisensors_bmc_data struct.
-+ */
-+static void ipmisensors_msg_handler(struct ipmi_recv_msg *msg,
-+ void *user_msg_data)
-+{
-+ struct ipmisensors_bmc_data *bmc =
-+ (struct ipmisensors_bmc_data *)user_msg_data;
-+
-+ if (msg->msg.data[0] != 0)
-+ printk(KERN_WARNING
-+ "ipmisensors: Error 0x%x on cmd 0x%x/0x%x\n",
-+ msg->msg.data[0], msg->msg.netfn, msg->msg.cmd);
-+
-+ if (bmc != NULL && ipmisensors_intf_registered(bmc->interface_id)) {
-+ if (bmc->state == STATE_SDR &&
-+ msg->msg.data[0] == IPMI_INVALID_RESERVATION_ID) {
-+ /* reservation cancelled, get new resid */
-+ if (++bmc->errorcount > 275) {
-+ printk(KERN_ERR
-+ "ipmisensors: Too many reservations cancelled, giving up\n");
-+ bmc->state = STATE_DONE;
-+ } else {
-+ printk(KERN_DEBUG
-+ "ipmisensors: resid 0x%04x cancelled, getting new one\n",
-+ bmc->resid);
-+
-+ ipmisensors_reserve_sdr(bmc);
-+ bmc->state = STATE_UNCANCEL;
-+ }
-+ } else if (msg->msg.data[0] != IPMI_CC_NO_ERROR &&
-+ msg->msg.data[0] != IPMI_ERR_RETURNING_REQ_BYTES &&
-+ msg->msg.data[0] != IPMI_ERR_PROVIDING_RESPONSE) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error 0x%x on cmd 0x%x/0x%x; state = %d; probably fatal.\n",
-+ msg->msg.data[0], msg->msg.netfn & 0xfe,
-+ msg->msg.cmd, bmc->state);
-+ } else {
-+ printk(KERN_DEBUG "ipmisensors: received message\n");
-+ ipmisensors_rcv_msg(bmc, &msg->msg);
-+ }
-+
-+ } else {
-+ printk(KERN_WARNING
-+ "ipmisensors: Response for non-registered BMC\n");
-+ if (bmc != NULL)
-+ printk(KERN_DEBUG "ipmisensors: BMC ID: %d\n",
-+ bmc->interface_id);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: BMC NULL!\n");
-+ }
-+
-+ ipmi_free_recv_msg(msg);
-+}
-+
-+/****** IPMI Interface Initialization ******/
-+
-+/**
-+ * Return true if the given ipmi interface has been registered.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static int ipmisensors_intf_registered(int ipmi_intf)
-+{
-+ int found = 0;
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->interface_id == ipmi_intf) {
-+ found++;
-+ }
-+ }
-+
-+ return found;
-+}
-+
-+/**
-+ * Return true if the given BMC has been registered.
-+ *
-+ * @bmc: The BMC device.
-+ */
-+static int ipmisensors_bmc_registered(struct device *bmc)
-+{
-+ int found = 0;
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->dev == bmc) {
-+ found++;
-+ }
-+ }
-+
-+ return found;
-+}
-+
-+/**
-+ * Register new IPMI BMC interface. Interface indpendent callback created
-+ * for flexibility in adding new types of interface callbacks in future.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static void ipmisensors_register_bmc(int ipmi_intf, struct ipmi_addr *address)
-+{
-+ int error;
-+
-+ /* allocate a new ipmisensors_bmc_data struct */
-+
-+ struct ipmisensors_bmc_data *bmc = (struct ipmisensors_bmc_data *)
-+ kmalloc(sizeof(struct ipmisensors_bmc_data), GFP_KERNEL);
-+
-+ /* initialize members */
-+ INIT_LIST_HEAD(&bmc->sdrs);
-+ bmc->interface_id = ipmi_intf;
-+
-+ bmc->address = *address;
-+
-+ bmc->sdr_count = 0;
-+ bmc->msgid = 0;
-+ bmc->ipmi_sdr_partial_size = IPMI_CHUNK_SIZE;
-+ bmc->state = STATE_INIT;
-+ bmc->errorcount = 0;
-+ bmc->rx_msg_data_offset = 0;
-+ bmc->dev = ipmi_get_bmcdevice(ipmi_intf);
-+
-+ /* default to 3 second min update interval */
-+ bmc->update_period = 3;
-+
-+ if (bmc->dev == NULL) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, couldn't get BMC device for interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Create IPMI messaging interface user */
-+ error = ipmi_create_user(bmc->interface_id, &driver_data.ipmi_hndlrs,
-+ bmc, &bmc->user);
-+ if (error < 0) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, unable to register user with ipmi interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Register the BMC as a HWMON class device */
-+ bmc->class_dev = hwmon_device_register(bmc->dev);
-+
-+ if (IS_ERR(bmc->class_dev)) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, unable to register hwmon class device for interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Register the BMC in the driver */
-+ if (ipmisensors_bmc_registered(bmc->dev)) {
-+ printk(KERN_ERR
-+ "ipmisensors: BMC on interface %d already registered\n",
-+ bmc->interface_id);
-+ hwmon_device_unregister(bmc->class_dev);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ ipmi_get_version(bmc->user, &bmc->ipmi_version_major,
-+ &bmc->ipmi_version_minor);
-+
-+ /* finally add the new bmc data to the bmc data list */
-+ list_add_tail(&bmc->list, &driver_data.bmc_data);
-+ driver_data.interfaces++;
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Registered IPMI %d.%d BMC over interface %d\n",
-+ bmc->ipmi_version_major,
-+ bmc->ipmi_version_minor, bmc->interface_id);
-+
-+ /* Send a reserve SDR command to the bmc */
-+ ipmisensors_reserve_sdr(bmc);
-+
-+ /* initialize the bmc's update work struct */
-+ INIT_DELAYED_WORK(&bmc->update_work, ipmisensors_update_bmc);
-+}
-+
-+/**
-+ * Callback for when an IPMI BMC is gone. Interface indpendent callback created
-+ * for flexibility in adding new types of interface callbacks in future.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static void ipmisensors_unregister_bmc(int ipmi_intf)
-+{
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->interface_id == ipmi_intf) {
-+ list_del(&cursor->list);
-+ printk(KERN_DEBUG
-+ "ipmisensors: cancelling queued work\n");
-+ /* cancel update work queued for this bmc */
-+ cancel_delayed_work(&cursor->update_work);
-+ printk(KERN_DEBUG
-+ "ipmisensors: waiting for update to finish\n");
-+ /* wait for readings to finish */
-+ while (cursor->state != STATE_DONE) ;
-+
-+ device_remove_file(cursor->dev,
-+ &cursor->alarms_attr.dev_attr);
-+ device_remove_file(cursor->dev,
-+ &cursor->update_attr.dev_attr);
-+ hwmon_device_unregister(cursor->class_dev);
-+ ipmisensors_sdr_cleanup(cursor);
-+ ipmi_destroy_user(cursor->user);
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Unegistered IPMI interface %d\n",
-+ cursor->interface_id);
-+
-+ kfree(cursor);
-+ driver_data.interfaces--;
-+ }
-+ }
-+
-+}
-+
-+/**
-+ * Unregister all registered bmcs.
-+ */
-+static void ipmisensors_unregister_bmc_all(void)
-+{
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ list_del(&cursor->list);
-+
-+ /* cancel update work queued for this bmc */
-+ printk(KERN_DEBUG "ipmisensors: cancelling queued work\n");
-+ cancel_delayed_work(&cursor->update_work);
-+
-+ printk(KERN_DEBUG
-+ "ipmisensors: waiting for update to finish\n");
-+ /* wait for readings to finish */
-+ while (cursor->state != STATE_DONE) ;
-+
-+ device_remove_file(cursor->dev, &cursor->alarms_attr.dev_attr);
-+ device_remove_file(cursor->dev, &cursor->update_attr.dev_attr);
-+ hwmon_device_unregister(cursor->class_dev);
-+ ipmisensors_sdr_cleanup(cursor);
-+ ipmi_destroy_user(cursor->user);
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Unegistered IPMI interface %d\n",
-+ cursor->interface_id);
-+
-+ kfree(cursor);
-+ }
-+
-+ driver_data.interfaces = 0;
-+}
-+
-+/**
-+ * Callback for when a new IPMI SMI type interface is found.
-+ *
-+ * @if_num: The IPMI interface number.
-+ */
-+static void ipmisensors_new_smi(int if_num, struct device *dev)
-+{
-+ struct ipmi_addr smi_address = {
-+ IPMI_SYSTEM_INTERFACE_ADDR_TYPE,
-+ IPMI_BMC_CHANNEL,
-+ {0},
-+ };
-+
-+ /* calls the generic new interface function */
-+ ipmisensors_register_bmc(if_num, &smi_address);
-+}
-+
-+/**
-+ * Callback for when an exisiting IPMI SMI type interface is gone.
-+ *
-+ * @if_num: The IPMI interface number.
-+ */
-+static void ipmisensors_smi_gone(int if_num)
-+{
-+ if (driver_data.interfaces > 0) {
-+ ipmisensors_unregister_bmc(if_num);
-+ }
-+}
-+
-+/**
-+ * Initialize the module.
-+ */
-+static int __init ipmisensors_init(void)
-+{
-+ int error;
-+ printk(KERN_INFO "ipmisensors - IPMI BMC sensors interface\n");
-+
-+ /* init cache managers */
-+ driver_data.sdrdata_cache =
-+ kmem_cache_create("ipmisensors_sdrdata", sizeof(struct sdrdata), 0,
-+ 0, NULL, NULL);
-+ driver_data.sysfsattr_cache =
-+ kmem_cache_create("ipmisensors_sysfsattr",
-+ sizeof(struct ipmisensors_device_attribute), 0, 0,
-+ NULL, NULL);
-+
-+ if (!driver_data.sdrdata_cache || !driver_data.sysfsattr_cache) {
-+ if (driver_data.sdrdata_cache)
-+ kmem_cache_destroy(driver_data.sdrdata_cache);
-+ if (driver_data.sysfsattr_cache)
-+ kmem_cache_destroy(driver_data.sysfsattr_cache);
-+ return -ENOMEM;
-+ }
-+
-+ /* register IPMI interface callback(s) */
-+ error = ipmi_smi_watcher_register(&driver_data.smi_watcher);
-+ if (error) {
-+ printk(KERN_WARNING
-+ "ipmisensors: can't register smi watcher\n");
-+ return error;
-+ }
-+
-+ /* create work queue, keep it simple, single-threaded */
-+ ipmisensors_workqueue =
-+ create_singlethread_workqueue("ipmisensors_workqueue");
-+
-+ return 0;
-+}
-+
-+/**
-+ * Cleanup
-+ */
-+static void ipmisensors_cleanup(void)
-+{
-+ /* start cleanup */
-+ cleanup = 1;
-+
-+ /* unregister bmcs */
-+ printk(KERN_DEBUG "ipmisensors: unregister bmcs\n");
-+ ipmi_smi_watcher_unregister(&driver_data.smi_watcher);
-+ ipmisensors_unregister_bmc_all();
-+
-+ /* flush & destroy work queue */
-+ printk(KERN_DEBUG "ipmisensors: destroy workqueue\n");
-+ flush_workqueue(ipmisensors_workqueue);
-+ destroy_workqueue(ipmisensors_workqueue);
-+
-+ /* remove cache managers */
-+ if (driver_data.sdrdata_cache)
-+ kmem_cache_destroy(driver_data.sdrdata_cache);
-+ if (driver_data.sysfsattr_cache)
-+ kmem_cache_destroy(driver_data.sysfsattr_cache);
-+}
-+
-+/**
-+ * Cleanup and exit the module
-+ */
-+static void __exit ipmisensors_exit(void)
-+{
-+ ipmisensors_cleanup();
-+ printk(KERN_DEBUG "ipmisensors: cleanup finished\n");
-+}
-+
-+MODULE_AUTHOR("Yani Ioannou <yani.ioannou@gmail.com>");
-+MODULE_DESCRIPTION("IPMI BMC sensors");
-+MODULE_LICENSE("GPL");
-+
-+module_init(ipmisensors_init);
-+module_exit(ipmisensors_exit);
-diff -rduNp linux-2.6.22.1.oorig2/drivers/hwmon/ipmisensors.h linux-2.6.22.1/drivers/hwmon/ipmisensors.h
---- linux-2.6.22.1.oorig2/drivers/hwmon/ipmisensors.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/drivers/hwmon/ipmisensors.h 2007-07-24 14:22:26.000000000 +0200
-@@ -0,0 +1,240 @@
-+/*
-+ * ipmisensors.h - lm_sensors interface to IPMI sensors.
-+ *
-+ * Copyright (C) 2004-2006 Yani Ioannou <yani.ioannou@gmail.com>
-+ *
-+ * Adapted from bmcsensors (lm-sensors for linux 2.4)
-+ * bmcsensors (C) Mark D. Studebaker <mdsxyz123@yahoo.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ */
-+
-+#include <linux/ipmi.h>
-+#include <linux/list.h>
-+#include <linux/slab.h>
-+#include <linux/workqueue.h>
-+
-+/* SDR defs */
-+#define STYPE_TEMP 0x01
-+#define STYPE_VOLT 0x02
-+#define STYPE_CURR 0x03
-+#define STYPE_FAN 0x04
-+
-+#define SDR_LIMITS 8
-+#define SDR_MAX_ID_LENGTH 16
-+#define SDR_MAX_UNPACKED_ID_LENGTH ((SDR_MAX_ID_LENGTH * 4 / 3) + 2)
-+
-+/* the last sensor type we are interested in */
-+#define STYPE_MAX 4
-+
-+#define IPMI_SDR_SIZE 67
-+#define IPMI_CHUNK_SIZE 16
-+
-+#define MAX_FILENAME_LENGTH 30
-+
-+struct ipmisensors_device_attribute {
-+ struct device_attribute dev_attr;
-+ struct sdrdata *sdr;
-+};
-+#define to_ipmisensors_dev_attr(_dev_attr) \
-+ container_of(_dev_attr, struct ipmisensors_device_attribute, dev_attr)
-+
-+#define IPMISENSORS_DEVICE_ATTR(_name,_mode,_show,_store,_index) \
-+struct ipmisensors_attribute sensor_dev_attr_##_name = { \
-+ .dev_attr = __ATTR(_name,_mode,_show,_store), \
-+ .index = _index, \
-+}
-+
-+struct ipmisensors_bmc_device_attribute {
-+ struct device_attribute dev_attr;
-+ struct ipmisensors_bmc_data *bmc;
-+};
-+#define to_ipmisensors_bmc_dev_attr(_dev_attr) \
-+ container_of(_dev_attr, struct ipmisensors_bmc_device_attribute, dev_attr)
-+
-+/**
-+ * &struct_sdrdata stores the IPMI Sensor Data Record (SDR) data, as recieved from the BMC, along with the corresponding sysfs attributes
-+ */
-+struct sdrdata {
-+ struct list_head list;
-+ /* retrieved from SDR, not expected to change */
-+ /* Sensor Type Code */
-+ u8 stype;
-+ u8 number;
-+ /* Sensor Capability Code */
-+ u8 capab;
-+ u16 thresh_mask;
-+ u8 format;
-+ u8 linear;
-+ s16 m;
-+ s16 b;
-+ u8 k;
-+ u8 nominal;
-+ u8 limits[SDR_LIMITS];
-+ /* index into limits for reported upper and lower limit */
-+ int lim1, lim2;
-+ u8 lim1_write, lim2_write;
-+ u8 string_type;
-+ u8 id_length;
-+ u8 id[SDR_MAX_ID_LENGTH];
-+ /* retrieved from reading */
-+ u8 reading;
-+ u8 status;
-+ u8 thresholds;
-+ /* sensor's bmc */
-+ struct ipmisensors_bmc_data *bmc;
-+ /* sysfs entries */
-+ struct ipmisensors_device_attribute attr;
-+ char *attr_name;
-+ struct ipmisensors_device_attribute attr_min;
-+ char *attr_min_name;
-+ struct ipmisensors_device_attribute attr_max;
-+ char *attr_max_name;
-+ struct ipmisensors_device_attribute attr_label;
-+ char *attr_label_name;
-+
-+};
-+
-+/**
-+ * &struct_ipmisensors_data stores the data for the ipmisensors driver.
-+ */
-+struct ipmisensors_data {
-+ /* Driver struct */
-+ char *driver_name;
-+
-+ /* Linked list of ipmisensors_bmc_data structs, one for each BMC */
-+ struct list_head bmc_data;
-+
-+ /* Number of ipmi interfaces (and hence ipmisensors_data structs). */
-+ int interfaces;
-+
-+ /* IPMI kernel interface - SMI watcher */
-+ struct ipmi_smi_watcher smi_watcher;
-+
-+ /* IPMI kernel interface - user handlers */
-+ struct ipmi_user_hndl ipmi_hndlrs;
-+
-+ /* Cache manager for sdrdata cache */
-+ struct kmem_cache *sdrdata_cache;
-+
-+ /* Cache manager for ipmi_sensor_device_attribute cache */
-+ struct kmem_cache *sysfsattr_cache;
-+};
-+
-+/**
-+ * &states: enumeration of state codes for a bmc specific ipmisensors
-+ */
-+enum states {
-+ STATE_INIT,
-+ STATE_RESERVE,
-+ STATE_SDR,
-+ STATE_SDRPARTIAL,
-+ STATE_READING,
-+ STATE_UNCANCEL,
-+ STATE_SYSTABLE,
-+ STATE_DONE
-+};
-+
-+/**
-+ * &struct_ipmisensors_bmc_data stores the data for a particular IPMI BMC.
-+ */
-+struct ipmisensors_bmc_data {
-+ struct list_head list;
-+
-+ /* The IPMI interface number */
-+ int interface_id;
-+
-+ /* The IPMI address */
-+ struct ipmi_addr address;
-+
-+ /* List of sdrdata structs (sdrs) recieved from the BMC */
-+ struct list_head sdrs;
-+
-+ /* Count of the number of sdrs stored in the sdr list */
-+ int sdr_count;
-+
-+ /* next message id */
-+ int msgid;
-+
-+ /* The ipmi interface 'user' used to access this particular bmc */
-+ ipmi_user_t user;
-+
-+ /* BMC IPMI Version (major) */
-+ unsigned char ipmi_version_major;
-+
-+ /* BMC IPMI Version (minor) */
-+ unsigned char ipmi_version_minor;
-+
-+ /* The size of the SDR request message */
-+ int ipmi_sdr_partial_size;
-+
-+ /* transmit message buffer */
-+ struct kernel_ipmi_msg tx_message;
-+
-+ /* ipmi transmited data buffer */
-+ unsigned char tx_msg_data[IPMI_MAX_MSG_LENGTH + 50]; /* why the +50 in bmcsensors? */
-+
-+ /* ipmi recieved data buffer */
-+ unsigned char rx_msg_data[IPMI_MAX_MSG_LENGTH + 50];
-+
-+ /* current recieve buffer offset */
-+ int rx_msg_data_offset;
-+
-+ /* The id of then next SDR record to read during update cycle */
-+ u16 nextrecord;
-+
-+ /* BMC SDR Reservation ID */
-+ u16 resid;
-+
-+ /* Alarm status */
-+ u8 alarms;
-+
-+ /* The cumalative error count for this bmc */
-+ int errorcount;
-+
-+ /* The current state of this bmc w.r.t. ipmisensors (see enum states) */
-+ int state;
-+
-+ /* The current sdr for which a reading is pending */
-+ struct sdrdata *current_sdr;
-+
-+ /* The BMC's device struct */
-+ struct device *dev;
-+
-+ /* hwmon class device */
-+ struct class_device *class_dev;
-+
-+ /* hwmon device name */
-+ struct device_attribute name_attr;
-+
-+ /* alarms attribute */
-+ struct ipmisensors_bmc_device_attribute alarms_attr;
-+
-+ /* update_period attribute */
-+ struct ipmisensors_bmc_device_attribute update_attr;
-+
-+ /* lower bound on time between updates (in seconds) */
-+ unsigned int update_period;
-+
-+ /* semaphore used to do a headcount of the SDR readings we are waiting
-+ * on in a given bmc update */
-+ struct semaphore update_semaphore;
-+
-+ /* bmc's work struct for updating sensors */
-+ struct delayed_work update_work;
-+
-+ /* bmc's work struct for building the sysfs workqueue */
-+ struct work_struct sysfs_work;
-+};
-diff -rduNp linux-2.6.22.1.oorig2/include/linux/ipmi.h linux-2.6.22.1/include/linux/ipmi.h
---- linux-2.6.22.1.oorig2/include/linux/ipmi.h 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/include/linux/ipmi.h 2007-07-24 14:22:26.000000000 +0200
-@@ -300,6 +300,9 @@ int ipmi_create_user(unsigned int
- safe, too. */
- int ipmi_destroy_user(ipmi_user_t user);
-
-+/* Get the IPMI BMC's device struct */
-+struct device *ipmi_get_bmcdevice(int ipmi_intf);
-+
- /* Get the IPMI version of the BMC we are talking to. */
- void ipmi_get_version(ipmi_user_t user,
- unsigned char *major,
-diff -rduNp linux-2.6.22.1.oorig2/include/linux/ipmi_msgdefs.h linux-2.6.22.1/include/linux/ipmi_msgdefs.h
---- linux-2.6.22.1.oorig2/include/linux/ipmi_msgdefs.h 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/include/linux/ipmi_msgdefs.h 2007-07-24 14:22:26.000000000 +0200
-@@ -45,6 +45,7 @@
-
- #define IPMI_NETFN_APP_REQUEST 0x06
- #define IPMI_NETFN_APP_RESPONSE 0x07
-+#define IPMI_GET_DEVICE_GUID_CMD 0x08
- #define IPMI_GET_DEVICE_ID_CMD 0x01
- #define IPMI_COLD_RESET_CMD 0x02
- #define IPMI_WARM_RESET_CMD 0x03
-@@ -57,6 +58,11 @@
- #define IPMI_GET_BMC_GLOBAL_ENABLES_CMD 0x2f
- #define IPMI_READ_EVENT_MSG_BUFFER_CMD 0x35
- #define IPMI_GET_CHANNEL_INFO_CMD 0x42
-+#define IPMI_RESERVE_SDR 0x22
-+#define IPMI_GET_SDR 0x23
-+#define IPMI_GET_SENSOR_STATE_READING 0x2D
-+#define IPMI_SET_SENSOR_HYSTERESIS 0x24
-+#define IPMI_SET_SENSOR_THRESHOLD 0x26
-
- #define IPMI_NETFN_STORAGE_REQUEST 0x0a
- #define IPMI_NETFN_STORAGE_RESPONSE 0x0b
-@@ -79,10 +85,13 @@
- #define IPMI_NODE_BUSY_ERR 0xc0
- #define IPMI_INVALID_COMMAND_ERR 0xc1
- #define IPMI_TIMEOUT_ERR 0xc3
-+#define IPMI_INVALID_RESERVATION_ID 0xc5
- #define IPMI_ERR_MSG_TRUNCATED 0xc6
- #define IPMI_REQ_LEN_INVALID_ERR 0xc7
- #define IPMI_REQ_LEN_EXCEEDED_ERR 0xc8
- #define IPMI_NOT_IN_MY_STATE_ERR 0xd5 /* IPMI 2.0 */
-+#define IPMI_ERR_RETURNING_REQ_BYTES 0xca
-+#define IPMI_ERR_PROVIDING_RESPONSE 0xce
- #define IPMI_LOST_ARBITRATION_ERR 0x81
- #define IPMI_BUS_ERR 0x82
- #define IPMI_NAK_ON_WRITE_ERR 0x83
+++ /dev/null
-diff -rduNp linux-2.6.22.1.oorig2/drivers/char/ipmi/ipmi_msghandler.c linux-2.6.22.1/drivers/char/ipmi/ipmi_msghandler.c
---- linux-2.6.22.1.oorig2/drivers/char/ipmi/ipmi_msghandler.c 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/drivers/char/ipmi/ipmi_msghandler.c 2007-07-24 14:22:26.000000000 +0200
-@@ -1953,6 +1953,24 @@ static void remove_proc_entries(ipmi_smi
- #endif /* CONFIG_PROC_FS */
- }
-
-+/*
-+ * Retrieves the bmc_device struct for a given ipmi interface number (or NULL if none).
-+ */
-+struct device *ipmi_get_bmcdevice(int if_num)
-+{
-+ ipmi_smi_t intf;
-+ mutex_lock(&ipmi_interfaces_mutex);
-+ list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
-+ if (intf->intf_num == if_num){
-+ mutex_unlock(&ipmi_interfaces_mutex);
-+ return &intf->bmc->dev->dev;
-+ }
-+ }
-+ mutex_unlock(&ipmi_interfaces_mutex);
-+
-+ return NULL;
-+}
-+
- static int __find_bmc_guid(struct device *dev, void *data)
- {
- unsigned char *id = data;
-@@ -4196,3 +4214,4 @@ EXPORT_SYMBOL(ipmi_get_my_LUN);
- EXPORT_SYMBOL(ipmi_smi_add_proc_entry);
- EXPORT_SYMBOL(ipmi_user_set_run_to_completion);
- EXPORT_SYMBOL(ipmi_free_recv_msg);
-+EXPORT_SYMBOL(ipmi_get_bmcdevice);
-diff -rduNp linux-2.6.22.1.oorig2/drivers/hwmon/Kconfig linux-2.6.22.1/drivers/hwmon/Kconfig
---- linux-2.6.22.1.oorig2/drivers/hwmon/Kconfig 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/drivers/hwmon/Kconfig 2007-07-24 14:22:26.000000000 +0200
-@@ -248,6 +248,16 @@ config SENSORS_CORETEMP
- sensor inside your CPU. Supported all are all known variants
- of Intel Core family.
-
-+config SENSORS_IPMI
-+ tristate "IPMI Hardware Monitoring Support"
-+ depends on HWMON && IPMI_HANDLER && EXPERIMENTAL
-+ help
-+ If you say yes here you get support for sensors monitored by
-+ an IPMI baseboard management controller (BMC).
-+
-+ This driver can also be built as a module. If so, the module
-+ will be called ipmisensors.
-+
- config SENSORS_IT87
- tristate "ITE IT87xx and compatibles"
- depends on I2C
-diff -rduNp linux-2.6.22.1.oorig2/drivers/hwmon/Makefile linux-2.6.22.1/drivers/hwmon/Makefile
---- linux-2.6.22.1.oorig2/drivers/hwmon/Makefile 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/drivers/hwmon/Makefile 2007-07-24 14:22:26.000000000 +0200
-@@ -32,6 +32,7 @@ obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o
- obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
- obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
- obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
-+obj-$(CONFIG_SENSORS_IPMI) += ipmisensors.o
- obj-$(CONFIG_SENSORS_IT87) += it87.o
- obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
- obj-$(CONFIG_SENSORS_LM63) += lm63.o
-diff -rduNp linux-2.6.22.1.oorig2/drivers/hwmon/ipmisensors.c linux-2.6.22.1/drivers/hwmon/ipmisensors.c
---- linux-2.6.22.1.oorig2/drivers/hwmon/ipmisensors.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/drivers/hwmon/ipmisensors.c 2007-07-24 14:22:26.000000000 +0200
-@@ -0,0 +1,1552 @@
-+/*
-+ * ipmisensors.c - lm-sensors/hwmon interface to IPMI sensors.
-+ *
-+ * Copyright (C) 2004-2006 Yani Ioannou <yani.ioannou@gmail.com>
-+ *
-+ * Adapted from bmcsensors (lm-sensors for linux 2.4)
-+ * bmcsensors (C) Mark D. Studebaker <mdsxyz123@yahoo.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ */
-+
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/param.h>
-+#include <linux/hwmon.h>
-+#include <linux/list.h>
-+#include <linux/slab.h>
-+#include <linux/device.h>
-+#include <linux/hwmon.h>
-+
-+#include "ipmisensors.h"
-+
-+/****** Function Prototypes ******/
-+static void ipmisensors_send_message(struct ipmisensors_bmc_data *bmc,
-+ long msgid, struct kernel_ipmi_msg *msg);
-+static void ipmisensors_reserve_sdr(struct ipmisensors_bmc_data *bmc);
-+static void ipmisensors_get_sdr(struct ipmisensors_bmc_data *bmc, u16 res_id,
-+ u16 record, u8 offset);
-+static void ipmisensors_set_sensor_threshold(struct ipmisensors_bmc_data *bmc,
-+ u8 number, int value,
-+ int lim_index);
-+static void ipmisensors_get_reading(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr);
-+static void ipmisensors_msg_handler(struct ipmi_recv_msg *msg,
-+ void *user_msg_data);
-+static int ipmisensors_intf_registered(int ipmi_intf);
-+static int ipmisensors_bmc_registered(struct device *bmc);
-+static void ipmisensors_register_bmc(int ipmi_intf, struct ipmi_addr *address);
-+static void ipmisensors_unregister_bmc(int ipmi_intf);
-+static void ipmisensors_unregister_bmc_all(void);
-+static void ipmisensors_new_smi(int if_num, struct device *dev);
-+static void ipmisensors_smi_gone(int if_num);
-+static void ipmisensors_update_bmc(struct work_struct *);
-+static void ipmisensors_cleanup(void);
-+
-+/****** Static Vars ******/
-+
-+/* set when module is being removed */
-+static int cleanup = 0;
-+
-+/* ipmisensors driver data */
-+static struct ipmisensors_data driver_data = {
-+ .driver_name = "bmc",
-+ .bmc_data = LIST_HEAD_INIT(driver_data.bmc_data),
-+ .interfaces = 0,
-+ .smi_watcher = {
-+ .owner = THIS_MODULE,
-+ .new_smi = ipmisensors_new_smi,
-+ .smi_gone = ipmisensors_smi_gone,
-+ },
-+ .ipmi_hndlrs = {
-+ .ipmi_recv_hndl = ipmisensors_msg_handler,
-+ },
-+};
-+
-+/* sensor refresh workqueue */
-+static struct workqueue_struct *ipmisensors_workqueue;
-+
-+/****** SDR List Functions ******/
-+/**
-+ * Creates a new sdrdata struct, or returns NULL if insufficient memory.
-+ */
-+static struct sdrdata *ipmisensors_new_sdr(void)
-+{
-+ struct sdrdata *sdr;
-+
-+ sdr = kmem_cache_alloc(driver_data.sdrdata_cache, GFP_ATOMIC);
-+ if (sdr) {
-+ memset(sdr, 0, sizeof(struct sdrdata));
-+ } else {
-+ printk(KERN_ERR
-+ "ipmisensors: Couldn't allocate memory for new SDR\n");
-+ }
-+
-+ return sdr;
-+}
-+
-+/**
-+ * Adds the given sdrdata struct to the given bmc's SDR list.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static inline void ipmisensors_add_sdr(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr)
-+{
-+ list_add(&sdr->list, &bmc->sdrs);
-+ printk(KERN_DEBUG
-+ "ipmisensors: SDR %d: type 0x%02x (%s)\n",
-+ bmc->sdr_count, sdr->stype, sdr->id);
-+ bmc->sdr_count++;
-+}
-+
-+/**
-+ * Cleanup the sdr list for the given BMC.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static void ipmisensors_sdr_cleanup(struct ipmisensors_bmc_data *bmc)
-+{
-+ struct sdrdata *cursor, *next;
-+
-+ /* find and free each sdr data struct */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ device_remove_file(bmc->dev, &cursor->attr.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_min.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_max.dev_attr);
-+ device_remove_file(bmc->dev, &cursor->attr_label.dev_attr);
-+
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+
-+ list_del(&cursor->list);
-+ kmem_cache_free(driver_data.sdrdata_cache, cursor);
-+ }
-+}
-+
-+/* worker function for workqueue ipmisensors_workqueue */
-+static void ipmisensors_update_bmc(struct work_struct *work)
-+{
-+ struct ipmisensors_bmc_data *bmc = container_of(work, struct ipmisensors_bmc_data, update_work.work);
-+
-+ /* don't start an update cycle if one already in progress */
-+ if (bmc->state != STATE_READING) {
-+ struct sdrdata *cursor, *next;
-+ bmc->state = STATE_READING;
-+ printk(KERN_DEBUG "ipmisensors: starting update\n");
-+
-+ /* init semaphore to 1 for update cycle */
-+ sema_init(&bmc->update_semaphore, 1);
-+
-+ /* update each sdr reading */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ ipmisensors_get_reading(bmc, cursor);
-+ }
-+ }
-+
-+ /* wait for readings (need timeout?) */
-+ down_interruptible(&bmc->update_semaphore);
-+
-+ printk(KERN_DEBUG "ipmisensors: update complete\n");
-+
-+ bmc->state = STATE_DONE;
-+
-+ /* if the module isn't cleaning up, schedule another update */
-+ if (!cleanup)
-+ queue_delayed_work(ipmisensors_workqueue, &bmc->update_work,
-+ bmc->update_period * HZ);
-+}
-+
-+/****** IPMI Message Sending ******/
-+
-+/**
-+ * Send a message to the IPMI BMC
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @msgid: the message id to use.
-+ * @msg: the ipmi message structure.
-+ */
-+static void ipmisensors_send_message(struct ipmisensors_bmc_data *bmc,
-+ long msgid, struct kernel_ipmi_msg *msg)
-+{
-+ if (msg->data == NULL)
-+ printk(KERN_DEBUG "ipmisensors: Send 0x%x\n", msg->cmd);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: Send 0x%x 0x%x 0x%x\n",
-+ msg->cmd, msg->data[0], msg->data[1]);
-+
-+ /* This should be ipmi_request, but Corey had to remove
-+ * that due to it being unused at the moment, as soon as
-+ * this makes it into the kernel we should request it be re-instated.
-+ */
-+ ipmi_request_settime(bmc->user, &bmc->address, msgid, msg, bmc, 0,
-+ -1, 0);
-+}
-+
-+/**
-+ * Compose and send a "reserve SDR" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ */
-+static void ipmisensors_reserve_sdr(struct ipmisensors_bmc_data *bmc)
-+{
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_RESERVE_SDR;
-+ bmc->tx_message.data_len = 0;
-+ bmc->tx_message.data = NULL;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Componse and send a "get SDR" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @res_id:
-+ * @record:
-+ * @offset:
-+ */
-+static void ipmisensors_get_sdr(struct ipmisensors_bmc_data *bmc, u16 res_id,
-+ u16 record, u8 offset)
-+{
-+ printk(KERN_DEBUG "ipmisensors: Get SDR 0x%x 0x%x 0x%x\n",
-+ res_id, record, offset);
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_GET_SDR;
-+ bmc->tx_message.data_len = 6;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = res_id & 0xff;
-+ bmc->tx_msg_data[1] = res_id >> 8;
-+ bmc->tx_msg_data[2] = record & 0xff;
-+ bmc->tx_msg_data[3] = record >> 8;
-+ bmc->tx_msg_data[4] = offset;
-+ bmc->tx_msg_data[5] = bmc->ipmi_sdr_partial_size;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Compose and send a "set sensor threshold" message
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @id: the ipmi id number of the sensor.
-+ * @value: the new value for the threshold.
-+ * @lim_index: the index in the lim[] array for which this value applies.
-+ */
-+static void ipmisensors_set_sensor_threshold(struct ipmisensors_bmc_data *bmc,
-+ u8 number, int value,
-+ int lim_index)
-+{
-+ int i;
-+
-+ printk(KERN_DEBUG "ipmisensors: Set SDR Threshold %d %d %d\n",
-+ number, value, lim_index);
-+ bmc->tx_message.netfn = IPMI_NETFN_STORAGE_REQUEST;
-+ bmc->tx_message.cmd = IPMI_SET_SENSOR_THRESHOLD;
-+ bmc->tx_message.data_len = 8;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = number & 0xff;
-+ bmc->tx_msg_data[1] = 0x01 << lim_index;
-+
-+ if (lim_index > 5 || lim_index < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Error - ipmisensors_set_sensor_threshold given invalid lim_index\n");
-+ return;
-+ }
-+
-+ for (i = 2; i < 8; i++)
-+ bmc->tx_msg_data[i] = 0x00;
-+
-+ bmc->tx_msg_data[lim_index] = value && 0xff;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+}
-+
-+/**
-+ * Compose and send a "get sensor reading" message for the given sdr.
-+ *
-+ * @bmc: the bmc to send the message to.
-+ * @sdr: the sdr of the sensor to get the reading for.
-+ */
-+static void ipmisensors_get_reading(struct ipmisensors_bmc_data *bmc,
-+ struct sdrdata *sdr)
-+{
-+ bmc->tx_message.netfn = IPMI_NETFN_SENSOR_EVENT_REQUEST;
-+ bmc->tx_message.cmd = IPMI_GET_SENSOR_STATE_READING;
-+ bmc->tx_message.data_len = 1;
-+ bmc->tx_message.data = bmc->tx_msg_data;
-+ bmc->tx_msg_data[0] = sdr->number;
-+ bmc->current_sdr = sdr;
-+
-+ ipmisensors_send_message(bmc, bmc->msgid++, &bmc->tx_message);
-+ down_interruptible(&bmc->update_semaphore);
-+}
-+
-+/****** IPMI Message Receiving ******/
-+
-+/**
-+ * Process an sensor reading response message.
-+ *
-+ * @bmc: the bmc the message is from
-+ * @msg: the IPMI SDR response message
-+ */
-+static void ipmisensors_rcv_reading_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ struct sdrdata *sdr = bmc->current_sdr;
-+
-+ if (sdr == NULL) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error ipmisensors_rcv_reading with NULL sdr\n");
-+ return;
-+ }
-+
-+ sdr->reading = msg->data[1];
-+ sdr->status = msg->data[2];
-+ sdr->thresholds = msg->data[3];
-+
-+ printk(KERN_DEBUG "ipmisensors: sensor %d (type %d) reading %d\n",
-+ sdr->number, sdr->stype, msg->data[1]);
-+
-+ up(&bmc->update_semaphore);
-+}
-+
-+/**
-+ * Unpack based on string type, convert to normal, null terminate.
-+ */
-+static void ipmisensors_sprintf(u8 * to, u8 * from, u8 type, u8 length)
-+{
-+ static const u8 *bcdplus = "0123456789 -.:,_";
-+ int i;
-+
-+ switch (type) {
-+ case 0: /* unicode */
-+ for (i = 0; i < length; i++)
-+ *to++ = (*from++ & 0x7f);
-+ *to = 0;
-+ break;
-+ case 1: /* BCD Plus */
-+ for (i = 0; i < length; i++)
-+ *to++ = bcdplus[*from++ & 0x0f];
-+ *to = 0;
-+ break;
-+ case 2: /* packed ascii *//* if not a mult. of 3 this will run over */
-+ for (i = 0; i < length; i += 3) {
-+ *to++ = *from & 0x3f;
-+ *to++ = *from >> 6 | ((*(from+1) & 0xf) << 2);
-+ from++;
-+ *to++ = *from >> 4 | ((*(from+1) & 0x3) << 4);
-+ from++;
-+ *to++ = (*from++ >> 2) & 0x3f;
-+ }
-+ *to = 0;
-+ break;
-+ case 3: /* normal */
-+ if (length > 1)
-+ memcpy(to, from, length);
-+ to[length] = 0;
-+ break;
-+ }
-+}
-+
-+/* IPMI V1.5 Section 30 */
-+static const int exps[] =
-+ { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 };
-+
-+/* Return 0 for fan, 2 for temp, 3 for voltage
-+ We could make it variable based on the accuracy (= log10(m * 10**k2));
-+ this would work for /proc output, however libsensors resolution
-+ is statically set in lib/chips.c */
-+static int decplaces(struct sdrdata *sd)
-+{
-+ switch (sd->stype) {
-+ case STYPE_TEMP:
-+ return 2;
-+ case STYPE_CURR:
-+ case STYPE_VOLT:
-+ return 3;
-+ case STYPE_FAN:
-+ default:
-+ return 0;
-+ }
-+}
-+
-+/* convert a raw value to a reading. IMPI V1.5 Section 30 */
-+static long conv_val(int value, struct sdrdata *sd)
-+{
-+ u8 k1, k2;
-+ long r;
-+
-+ r = value * sd->m;
-+ k1 = sd->k & 0x0f;
-+ k2 = sd->k >> 4;
-+ if (k1 < 8)
-+ r += sd->b * exps[k1];
-+ else
-+ r += sd->b / exps[16 - k1];
-+ r *= exps[decplaces(sd)];
-+ if (k2 < 8) {
-+ if (sd->linear != 7)
-+ r *= exps[k2];
-+ else
-+ /* this will always truncate to 0: r = 1 / (exps[k2] * r); */
-+ r = 0;
-+ } else {
-+ if (sd->linear != 7)
-+ r /= exps[16 - k2];
-+ else {
-+ if (r != 0)
-+ /* 1 / x * 10 ** (-m) == 10 ** m / x */
-+ r = exps[16 - k2] / r;
-+ else
-+ r = 0;
-+ }
-+ }
-+
-+ return r;
-+}
-+
-+static const char *threshold_text[] = {
-+ "upper non-recoverable threshold",
-+ "upper critical threshold",
-+ "upper non-critical threshold",
-+ "lower non-recoverable threshold",
-+ "lower critical threshold",
-+ "lower non-critical threshold",
-+ "positive-going hysteresis",
-+ "negative-going hysteresis" /* unused */
-+};
-+
-+/* select two out of the 8 possible readable thresholds, and place indexes into the limits
-+ array into lim1 and lim2. Set writable flags */
-+static void ipmisensors_select_thresholds(struct sdrdata *sd)
-+{
-+ u8 capab = sd->capab;
-+ u16 mask = sd->thresh_mask;
-+ int tmp;
-+
-+ sd->lim1 = -1;
-+ sd->lim2 = -1;
-+ sd->lim1_write = 0;
-+ sd->lim2_write = 0;
-+
-+ if (((capab & 0x0c) == 0x04) || /* readable thresholds ? */
-+ ((capab & 0x0c) == 0x08)) {
-+ /* select upper threshold */
-+ if (mask & 0x10) { /* upper crit */
-+ sd->lim1 = 1;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x1000))
-+ sd->lim1_write = 1;
-+ } else if (mask & 0x20) { /* upper non-recov */
-+ sd->lim1 = 0;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x2000))
-+ sd->lim1_write = 1;
-+ } else if (mask & 0x08) { /* upper non-crit */
-+ sd->lim1 = 2;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0800))
-+ sd->lim1_write = 1;
-+ }
-+
-+ /* select lower threshold */
-+ if ((((capab & 0x30) == 0x10) || /* readable ? */
-+ ((capab & 0x30) == 0x20)) && /* pos hyst */
-+ sd->stype == STYPE_TEMP)
-+ sd->lim2 = 6;
-+ else if (mask & 0x02) { /* lower crit */
-+ sd->lim2 = 4;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0200))
-+ sd->lim2_write = 1;
-+ } else if (mask & 0x04) { /* lower non-recov */
-+ sd->lim2 = 3;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0400))
-+ sd->lim2_write = 1;
-+ } else if (mask & 0x01) { /* lower non-crit */
-+ sd->lim2 = 5;
-+ if ((capab & 0x0c) == 0x08 && (mask & 0x0100))
-+ sd->lim2_write = 1;
-+ }
-+ }
-+
-+ /* swap lim1/lim2 if m < 0 or function is 1/x (but not both!) */
-+ if ((sd->m < 0 && sd->linear != 7) || (sd->m >= 0 && sd->linear == 7)) {
-+ tmp = sd->lim1;
-+ sd->lim1 = sd->lim2;
-+ sd->lim2 = tmp;
-+ }
-+
-+ if (sd->lim1 >= 0)
-+ printk(KERN_INFO "ipmisensors: using %s for upper limit\n",
-+ threshold_text[sd->lim1]);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: no readable upper limit\n");
-+
-+ if (sd->lim2 >= 0)
-+ printk(KERN_INFO "ipmisensors: using %s for lower limit\n",
-+ threshold_text[sd->lim2]);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: no readable lower limit\n");
-+}
-+
-+/************* sysfs callback functions *********/
-+static ssize_t show_update_period(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+
-+ return snprintf(buf, 20, "%d\n", aattr->bmc->update_period);
-+}
-+
-+static ssize_t store_update_period(struct device *dev,
-+ struct device_attribute *attr,
-+ const char *buf, size_t count)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+
-+ aattr->bmc->update_period = simple_strtoul(buf, NULL, 10);;
-+ return count;
-+};
-+
-+static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ return snprintf(buf, 20, "%ld\n",
-+ conv_val(sattr->sdr->reading, sattr->sdr));
-+}
-+
-+static ssize_t show_sensor_max(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ long max = 0;
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ if (sattr->sdr->lim1 >= 0)
-+ max = conv_val(sattr->sdr->limits[sattr->sdr->lim1],
-+ sattr->sdr);
-+ return snprintf(buf, 20, "%ld\n", max);
-+}
-+
-+static ssize_t show_sensor_min(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ long min = 0;
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ if (sattr->sdr->lim2 >= 0)
-+ min = conv_val(sattr->sdr->limits[sattr->sdr->lim2],
-+ sattr->sdr);
-+ return snprintf(buf, 20, "%ld\n", min);
-+};
-+
-+static ssize_t show_sensor_label(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ u8 label[SDR_MAX_UNPACKED_ID_LENGTH];
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+
-+ ipmisensors_sprintf(label, sattr->sdr->id, sattr->sdr->string_type,
-+ sattr->sdr->id_length);
-+ return snprintf(buf, 20, "%s\n", label);
-+};
-+
-+static ssize_t store_sensor_max(struct device *dev,
-+ struct device_attribute *attr, const char *buf,
-+ size_t count)
-+{
-+ long val = simple_strtoul(buf, NULL, 10);
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ printk(KERN_DEBUG "ipmisensors: set max on sensor #%d to %ld",
-+ sattr->sdr->number, val);
-+ ipmisensors_set_sensor_threshold(sattr->sdr->bmc, sattr->sdr->number,
-+ val, sattr->sdr->lim1);
-+ return count;
-+};
-+
-+static ssize_t store_sensor_min(struct device *dev,
-+ struct device_attribute *attr, const char *buf,
-+ size_t count)
-+{
-+ long val = simple_strtoul(buf, NULL, 10);
-+ struct ipmisensors_device_attribute *sattr =
-+ to_ipmisensors_dev_attr(attr);
-+ printk(KERN_DEBUG "ipmisensors: set min on sensor #%d to %ld",
-+ sattr->sdr->number, val);
-+ ipmisensors_set_sensor_threshold(sattr->sdr->bmc, sattr->sdr->number,
-+ val, sattr->sdr->lim2);
-+ return count;
-+};
-+
-+static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct ipmisensors_bmc_device_attribute *aattr =
-+ to_ipmisensors_bmc_dev_attr(attr);
-+ return snprintf(buf, 20, "%d\n", aattr->bmc->alarms);
-+};
-+
-+static ssize_t show_name(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ return snprintf(buf, 20, "%s\n", driver_data.driver_name);
-+};
-+
-+/* work function to build the sysfs entries using the ipmi sdrs */
-+static void ipmisensors_build_sysfs(struct work_struct *work)
-+{
-+ int temps = 0, volts = 0, currs = 0, fans = 0;
-+ struct sdrdata *cursor, *next;
-+ struct ipmisensors_bmc_data *bmc = container_of(work, struct ipmisensors_bmc_data, sysfs_work);
-+
-+ /* find and create entries for each sdr data struct */
-+ list_for_each_entry_safe(cursor, next, &bmc->sdrs, list) {
-+ u8 id[SDR_MAX_UNPACKED_ID_LENGTH];
-+
-+ cursor->attr_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+ cursor->attr_max_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+ cursor->attr_min_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+
-+ if (cursor->id_length > 0) {
-+ cursor->attr_label_name =
-+ (char *)kmalloc(sizeof(char) * MAX_FILENAME_LENGTH,
-+ GFP_KERNEL);
-+
-+ if (cursor->attr_label_name == NULL) {
-+ printk(KERN_INFO
-+ "ipmisensors: Out of memory (kmalloc failed)");
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ return;
-+ }
-+ }
-+
-+ if (cursor->attr_name == NULL || cursor->attr_max_name == NULL
-+ || cursor->attr_min_name == NULL
-+ || cursor->attr_label_name == NULL) {
-+ printk(KERN_INFO
-+ "ipmisensors: Out of memory (kmalloc failed)");
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+ return;
-+ }
-+
-+ switch (cursor->stype) {
-+ case (STYPE_TEMP):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "temp%d_input", ++temps);
-+ /* create min, max attributes */
-+ snprintf(cursor->attr_max_name, MAX_FILENAME_LENGTH,
-+ "temp%d_max", temps);
-+ snprintf(cursor->attr_min_name, MAX_FILENAME_LENGTH,
-+ "temp%d_min", temps);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "temp%d_label", temps);
-+ break;
-+ case (STYPE_VOLT):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "in%d_input", ++volts);
-+ /* create min, max attributes */
-+ snprintf(cursor->attr_max_name, MAX_FILENAME_LENGTH,
-+ "in%d_max", volts);
-+ snprintf(cursor->attr_min_name, MAX_FILENAME_LENGTH,
-+ "in%d_min", volts);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "in%d_label", volts);
-+ break;
-+ case (STYPE_CURR):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "curr%d_input", ++currs);
-+ /* create min, max attributes */
-+ sprintf(cursor->attr_max_name, "curr%d_max", currs);
-+ sprintf(cursor->attr_min_name, "curr%d_min", currs);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "curr%d_label", currs);
-+ break;
-+ case (STYPE_FAN):
-+ /* create the name of the sensor */
-+ snprintf(cursor->attr_name, MAX_FILENAME_LENGTH,
-+ "fan%d_input", ++fans);
-+ /* create min, max attributes */
-+ sprintf(cursor->attr_max_name, "fan%d_max", fans);
-+ sprintf(cursor->attr_min_name, "fan%d_min", fans);
-+ /* create the label of the sensor */
-+ snprintf(cursor->attr_label_name, MAX_FILENAME_LENGTH,
-+ "fan%d_label", fans);
-+ break;
-+ default:
-+ printk(KERN_INFO "ipmisensors: unkown sensor type\n");
-+ continue;
-+ }
-+
-+ cursor->attr.dev_attr.attr.name = cursor->attr_name;
-+ cursor->attr.dev_attr.attr.mode = S_IRUGO;
-+ cursor->attr.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr.dev_attr.show = show_sensor;
-+ cursor->attr.dev_attr.store = NULL;
-+ cursor->attr.sdr = cursor;
-+
-+ cursor->attr_min.dev_attr.attr.name = cursor->attr_min_name;
-+ cursor->attr_min.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_min.dev_attr.show = show_sensor_min;
-+ cursor->attr_min.sdr = cursor;
-+
-+ if (cursor->lim2_write) {
-+ printk(KERN_INFO
-+ "ipmisensors: You have a writable sensor threshold! Send me an e-mail at <yani.ioannou@gmail.com>.\n");
-+ cursor->attr_min.dev_attr.store = store_sensor_min;
-+ cursor->attr_min.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ } else {
-+ cursor->attr_min.dev_attr.store = NULL;
-+ cursor->attr_min.dev_attr.attr.mode = S_IRUGO;
-+ }
-+
-+ cursor->attr_max.dev_attr.attr.name = cursor->attr_max_name;
-+ cursor->attr_max.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_max.dev_attr.show = show_sensor_max;
-+ cursor->attr_max.sdr = cursor;
-+
-+ if (cursor->lim1_write) {
-+ printk(KERN_INFO
-+ "ipmisensors: You have a writable sensor threshold! Send me an e-mail at <yani.ioannou@gmail.com>.\n");
-+ cursor->attr_max.dev_attr.store = store_sensor_max;
-+ cursor->attr_max.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ } else {
-+ cursor->attr_max.dev_attr.store = NULL;
-+ cursor->attr_max.dev_attr.attr.mode = S_IRUGO;
-+ }
-+
-+ if (cursor->id_length > 0) {
-+ cursor->attr_label.dev_attr.attr.name =
-+ cursor->attr_label_name;
-+ cursor->attr_label.dev_attr.attr.mode = S_IRUGO;
-+ cursor->attr_label.dev_attr.attr.owner = THIS_MODULE;
-+ cursor->attr_label.dev_attr.show = show_sensor_label;
-+ cursor->attr_label.dev_attr.store = NULL;
-+ cursor->attr_label.sdr = cursor;
-+ }
-+
-+ printk(KERN_INFO
-+ "ipmisensors: registering sensor %d: (type 0x%.2x) "
-+ "(fmt=%d; m=%d; b=%d; k1=%d; k2=%d; cap=0x%.2x; mask=0x%.4x)\n",
-+ cursor->number, cursor->stype, cursor->format, cursor->m,
-+ cursor->b, cursor->k & 0xf, cursor->k >> 4,
-+ cursor->capab, cursor->thresh_mask);
-+
-+ if (cursor->id_length > 0) {
-+ ipmisensors_sprintf(id, cursor->id, cursor->string_type,
-+ cursor->id_length);
-+ switch (cursor->stype) {
-+ case (STYPE_TEMP):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label temp%d \"%s\"\n",
-+ temps, id);
-+ break;
-+ case (STYPE_VOLT):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label in%d \"%s\"\n",
-+ volts, id);
-+ break;
-+ case (STYPE_CURR):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label curr%d \"%s\"\n",
-+ currs, id);
-+ break;
-+ case (STYPE_FAN):
-+ printk(KERN_INFO
-+ "ipmisensors: sensors.conf: label fan%d \"%s\"\n",
-+ fans, id);
-+ break;
-+ }
-+ }
-+
-+ ipmisensors_select_thresholds(cursor);
-+
-+ if (cursor->linear != 0 && cursor->linear != 7) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: nonlinear function 0x%.2x unsupported, expect bad results\n",
-+ cursor->number, cursor->linear);
-+ }
-+
-+ if ((cursor->format & 0x03) == 0x02) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: 1's complement format unsupported, expect bad results\n",
-+ cursor->number);
-+ } else if ((cursor->format & 0x03) == 0x03) {
-+ printk(KERN_INFO
-+ "ipmisensors: sensor %d: threshold sensor only, no readings available",
-+ cursor->number);
-+ }
-+
-+ if (cursor->lim1_write || cursor->lim2_write)
-+ cursor->attr.dev_attr.attr.mode = 0644;
-+ else
-+ cursor->attr.dev_attr.attr.mode = 0444;
-+
-+ if (device_create_file(bmc->dev, &cursor->attr.dev_attr) < 0
-+ || device_create_file(bmc->dev,
-+ &cursor->attr_min.dev_attr) < 0
-+ || device_create_file(bmc->dev,
-+ &cursor->attr_max.dev_attr) < 0
-+ || (cursor->id_length >
-+ 0 ? device_create_file(bmc->dev,
-+ &cursor->attr_label.dev_attr) <
-+ 0 : 0)
-+ ) {
-+ printk(KERN_INFO
-+ "ipmisensors: sysfs file creation failed for SDR %d (%s).\n",
-+ cursor->number, cursor->id);
-+ kfree(cursor->attr_name);
-+ kfree(cursor->attr_max_name);
-+ kfree(cursor->attr_min_name);
-+ kfree(cursor->attr_label_name);
-+ return;
-+ }
-+ }
-+
-+ bmc->alarms_attr.dev_attr.attr.name = "alarms";
-+ bmc->alarms_attr.dev_attr.attr.mode = S_IRUGO;
-+ bmc->alarms_attr.dev_attr.attr.owner = THIS_MODULE;
-+ bmc->alarms_attr.dev_attr.show = show_alarms;
-+ bmc->alarms_attr.dev_attr.store = NULL;
-+ bmc->alarms_attr.bmc = bmc;
-+
-+ if (device_create_file(bmc->dev, &bmc->alarms_attr.dev_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'alarms'");
-+ return;
-+ }
-+
-+ bmc->name_attr.attr.name = "name";
-+ bmc->name_attr.attr.mode = S_IRUGO;
-+ bmc->name_attr.attr.owner = THIS_MODULE;
-+ bmc->name_attr.show = show_name;
-+
-+ if (device_create_file(bmc->dev, &bmc->name_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'name'");
-+ return;
-+ }
-+
-+ bmc->update_attr.dev_attr.attr.name = "update_period";
-+ bmc->update_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
-+ bmc->update_attr.dev_attr.attr.owner = THIS_MODULE;
-+ bmc->update_attr.dev_attr.show = show_update_period;
-+ bmc->update_attr.dev_attr.store = store_update_period;
-+ bmc->update_attr.bmc = bmc;
-+
-+ if (device_create_file(bmc->dev, &bmc->update_attr.dev_attr) < 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: Failed to create sysfs entry 'update_period'");
-+ return;
-+ }
-+
-+ printk(KERN_INFO
-+ "ipmisensors: registered %d temp, %d volt, %d current, %d fan sensors\n",
-+ temps, volts, currs, fans);
-+
-+ /* This completes the initialization. We can now kickoff the
-+ * periodic update of the bmc sensor's values by scheduling
-+ * the first work.
-+ */
-+ queue_work(ipmisensors_workqueue, &bmc->update_work.work);
-+
-+}
-+
-+/**
-+ * Process an SDR response message, save the SDRs we like in the sdr
-+ * list for the given BMC.
-+ *
-+ * @bmc: the bmc the message is from
-+ * @msg: the IPMI SDR response message
-+ */
-+static void ipmisensors_rcv_sdr_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ u16 record;
-+ int type;
-+ int stype;
-+ int id_length;
-+ int i;
-+ int ipmi_ver = 0;
-+ unsigned char *data;
-+ u8 id[SDR_MAX_UNPACKED_ID_LENGTH];
-+ struct sdrdata *sdr;
-+
-+ if (msg->data[0] != 0) {
-+ /* cut request in half and try again */
-+ bmc->ipmi_sdr_partial_size /= 2;
-+ if (bmc->ipmi_sdr_partial_size < 8) {
-+ printk(KERN_INFO
-+ "ipmisensors: IPMI buffers too small, giving up\n");
-+ bmc->state = STATE_DONE;
-+ return;
-+ }
-+ printk(KERN_DEBUG
-+ "ipmisensors: Reducing SDR request size to %d\n",
-+ bmc->ipmi_sdr_partial_size);
-+
-+ ipmisensors_get_sdr(bmc, 0, 0, 0);
-+ bmc->state = STATE_SDR;
-+ return;
-+ }
-+ if (bmc->ipmi_sdr_partial_size < IPMI_SDR_SIZE) {
-+ if (bmc->rx_msg_data_offset == 0) {
-+ memcpy(bmc->rx_msg_data, msg->data,
-+ bmc->ipmi_sdr_partial_size + 3);
-+ bmc->rx_msg_data_offset =
-+ bmc->ipmi_sdr_partial_size + 3;
-+ } else {
-+ memcpy(bmc->rx_msg_data + bmc->rx_msg_data_offset,
-+ msg->data + 3, bmc->ipmi_sdr_partial_size);
-+ bmc->rx_msg_data_offset += bmc->ipmi_sdr_partial_size;
-+ }
-+ if (bmc->rx_msg_data_offset > bmc->rx_msg_data[7] + 7) {
-+ /* got last chunk */
-+ bmc->rx_msg_data_offset = 0;
-+ data = bmc->rx_msg_data;
-+ } else {
-+ /* get more */
-+ record =
-+ (bmc->rx_msg_data[4] << 8) | bmc->rx_msg_data[3];
-+ ipmisensors_get_sdr(bmc, bmc->resid, record,
-+ bmc->rx_msg_data_offset - 3);
-+ bmc->state = STATE_SDR;
-+ return;
-+ }
-+ } else {
-+ /* got it in one chunk */
-+ data = msg->data;
-+ }
-+
-+ bmc->nextrecord = (data[2] << 8) | data[1];
-+
-+ /* If the ipmi version is 0.9 we have to remap some things.
-+ * Yes this is very ugly, but we aren't the ones who
-+ * implemented an incomplete spec!
-+ */
-+ ipmi_ver = data[5];
-+
-+ type = data[6];
-+ /* known SDR type */
-+ if (type == 1 || type == 2) {
-+ stype = data[(ipmi_ver == 0x90 ? 16 : 15)];
-+ /* known sensor type */
-+ if (stype <= STYPE_MAX) {
-+ if (data[(ipmi_ver == 0x90 ? 17 : 16)] != 0x01) {
-+ if (type == 1)
-+ ipmisensors_sprintf(id, &data[51],
-+ data[50] >> 6,
-+ data[50] & 0x1f);
-+ else
-+ ipmisensors_sprintf(id,
-+ &data[(ipmi_ver ==
-+ 0x90 ? 30 :
-+ 35)],
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 :
-+ 34)] >> 6,
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 :
-+ 34)] & 0x1f);
-+ printk(KERN_INFO
-+ "ipmisensors: skipping non-threshold sensor \"%s\"\n",
-+ id);
-+ } else {
-+ /* add entry to sdrd table */
-+ sdr = ipmisensors_new_sdr();
-+ if (!sdr) {
-+ printk(KERN_ERR
-+ "ipmisensors: could not allocate memory for new SDR");
-+ return;
-+ }
-+ sdr->bmc = bmc;
-+ sdr->stype = stype;
-+ sdr->number = data[10];
-+ sdr->capab = data[(ipmi_ver == 0x90 ? 15 : 14)];
-+ sdr->thresh_mask =
-+ (((u16) data[(ipmi_ver == 0x90 ? 21 : 22)])
-+ << 8) | data[21];
-+ if (type == 1) {
-+ sdr->format =
-+ data[(ipmi_ver ==
-+ 0x90 ? 22 : 24)] >> 6;
-+ sdr->linear =
-+ data[(ipmi_ver ==
-+ 0x90 ? 25 : 26)] & 0x7f;
-+ sdr->m =
-+ data[(ipmi_ver == 0x90 ? 26 : 27)];
-+ sdr->m |= ((u16)
-+ (data
-+ [(ipmi_ver ==
-+ 0x90 ? 27 : 28)]
-+ & 0xc0)) << 2;
-+ if (sdr->m & 0x0200) {
-+ /* sign extend */
-+ sdr->m |= 0xfc00;
-+ }
-+ sdr->b =
-+ data[(ipmi_ver == 0x90 ? 28 : 29)];
-+ sdr->b |= ((u16)
-+ (data
-+ [(ipmi_ver ==
-+ 0x90 ? 29 : 30)]
-+ & 0xc0)) << 2;
-+ if (sdr->b & 0x0200) {
-+ /* sign extend */
-+ sdr->b |= 0xfc00;
-+ }
-+ sdr->k =
-+ data[(ipmi_ver == 0x90 ? 31 : 32)];
-+ sdr->nominal =
-+ data[(ipmi_ver == 0x90 ? 33 : 34)];
-+ for (i = 0; i < SDR_LIMITS; i++) {
-+ /* assume readable */
-+ sdr->limits[i] =
-+ data[(ipmi_ver ==
-+ 0x90 ? 40 : 39) + i];
-+ }
-+ sdr->string_type = data[50] >> 6;
-+ id_length = data[50] & 0x1f;
-+ memcpy(sdr->id, &data[51], id_length);
-+ sdr->id_length = id_length;
-+ } else {
-+ sdr->m = 1;
-+ sdr->b = 0;
-+ sdr->k = 0;
-+ sdr->string_type =
-+ data[(ipmi_ver ==
-+ 0x90 ? 29 : 34)] >> 6;
-+ id_length = data[34] & 0x1f;
-+ if (id_length > 0) {
-+ memcpy(sdr->id,
-+ &data[(ipmi_ver ==
-+ 0x90 ? 30 : 35)],
-+ id_length);
-+ }
-+ sdr->id_length = id_length;
-+ /* limits?? */
-+ if (ipmi_ver == 0x90) {
-+ memcpy(sdr->id,
-+ &data[30], id_length);
-+ sdr->id_length = id_length;
-+ }
-+ }
-+ ipmisensors_add_sdr(bmc, sdr);
-+ }
-+ }
-+ /* peek at the other SDR types */
-+ } else if (type == 0x10 || type == 0x11 || type == 0x12) {
-+ ipmisensors_sprintf(id, data + 19, data[18] >> 6,
-+ data[18] & 0x1f);
-+ if (type == 0x10) {
-+ printk(KERN_INFO
-+ "ipmisensors: Generic Device acc=0x%x; slv=0x%x; lun=0x%x; type=0x%x; \"%s\"\n",
-+ data[8], data[9], data[10], data[13], id);
-+ } else if (type == 0x11) {
-+ printk(KERN_INFO
-+ "ipmisensors: FRU Device acc=0x%x; slv=0x%x; log=0x%x; ch=0x%x; type=0x%x; \"%s\"\n",
-+ data[8], data[9], data[10], data[11], data[13],
-+ id);
-+ } else {
-+ printk(KERN_INFO
-+ "ipmisensors: Mgmt Ctllr Device slv=0x%x; \"%s\"\n",
-+ data[8], id);
-+ }
-+ } else if (type == 0x14) {
-+ printk(KERN_INFO
-+ "ipmisensors: Message Channel Info Records:\n");
-+ for (i = 0; i < 8; i++) {
-+ printk(KERN_INFO "ipmisensors: Channel %d info 0x%x\n",
-+ i, data[9 + i]);
-+ }
-+ } else {
-+ printk(KERN_INFO "ipmisensors: Skipping SDR type 0x%x\n", type);
-+ }
-+ if (ipmi_ver != 0x90) {
-+ if (bmc->nextrecord >= 6224) {
-+ /*YJ stop sensor scan on poweredge 1750 */
-+ bmc->nextrecord = 0xffff;
-+ }
-+ }
-+
-+ if (bmc->nextrecord == 0xFFFF) {
-+ if (bmc->sdr_count == 0) {
-+ printk(KERN_INFO
-+ "ipmisensors: No recognized sensors found.\n");
-+ bmc->state = STATE_DONE;
-+ } else {
-+ printk(KERN_INFO "ipmisensors: all sensors detected\n");
-+ bmc->state = STATE_SYSTABLE;
-+
-+ /* Schedule sysfs build/registration work */
-+ INIT_WORK(&bmc->sysfs_work, ipmisensors_build_sysfs);
-+ queue_work(ipmisensors_workqueue, &bmc->sysfs_work);
-+ }
-+ } else {
-+ ipmisensors_get_sdr(bmc, 0, bmc->nextrecord, 0);
-+ bmc->state = STATE_SDR;
-+ }
-+}
-+
-+/**
-+ * Process incoming messages based on internal state
-+ *
-+ * @bmc: the bmc the message is from.
-+ * @msg: the ipmi message to process.
-+ */
-+static void ipmisensors_rcv_msg(struct ipmisensors_bmc_data *bmc,
-+ struct kernel_ipmi_msg *msg)
-+{
-+ switch (bmc->state) {
-+ case STATE_INIT:
-+ case STATE_RESERVE:
-+ bmc->resid = (((u16) msg->data[2]) << 8) | msg->data[1];
-+
-+ printk(KERN_DEBUG "ipmisensors: Got first resid 0x%.4x\n",
-+ bmc->resid);
-+
-+ ipmisensors_get_sdr(bmc, 0, 0, 0);
-+ bmc->state = STATE_SDR;
-+ break;
-+
-+ case STATE_SDR:
-+ case STATE_SDRPARTIAL:
-+ ipmisensors_rcv_sdr_msg(bmc, msg);
-+ break;
-+
-+ case STATE_READING:
-+ ipmisensors_rcv_reading_msg(bmc, msg);
-+ break;
-+
-+ case STATE_UNCANCEL:
-+ bmc->resid = (((u16) msg->data[2]) << 8) | msg->data[1];
-+
-+ printk(KERN_DEBUG "ipmisensors: Got new resid 0x%.4x\n",
-+ bmc->resid);
-+
-+ bmc->rx_msg_data_offset = 0;
-+ ipmisensors_get_sdr(bmc, 0, bmc->nextrecord, 0);
-+ bmc->state = STATE_SDR;
-+ break;
-+
-+ case STATE_DONE:
-+ case STATE_SYSTABLE:
-+ break;
-+ default:
-+ bmc->state = STATE_INIT;
-+ }
-+}
-+
-+/**
-+ * Callback to handle a received IPMI message from a given BMC.
-+ *
-+ * @msg: the received message.
-+ * @handler_data: a pointer to the particular bmc ipmisensors_bmc_data struct.
-+ */
-+static void ipmisensors_msg_handler(struct ipmi_recv_msg *msg,
-+ void *user_msg_data)
-+{
-+ struct ipmisensors_bmc_data *bmc =
-+ (struct ipmisensors_bmc_data *)user_msg_data;
-+
-+ if (msg->msg.data[0] != 0)
-+ printk(KERN_WARNING
-+ "ipmisensors: Error 0x%x on cmd 0x%x/0x%x\n",
-+ msg->msg.data[0], msg->msg.netfn, msg->msg.cmd);
-+
-+ if (bmc != NULL && ipmisensors_intf_registered(bmc->interface_id)) {
-+ if (bmc->state == STATE_SDR &&
-+ msg->msg.data[0] == IPMI_INVALID_RESERVATION_ID) {
-+ /* reservation cancelled, get new resid */
-+ if (++bmc->errorcount > 275) {
-+ printk(KERN_ERR
-+ "ipmisensors: Too many reservations cancelled, giving up\n");
-+ bmc->state = STATE_DONE;
-+ } else {
-+ printk(KERN_DEBUG
-+ "ipmisensors: resid 0x%04x cancelled, getting new one\n",
-+ bmc->resid);
-+
-+ ipmisensors_reserve_sdr(bmc);
-+ bmc->state = STATE_UNCANCEL;
-+ }
-+ } else if (msg->msg.data[0] != IPMI_CC_NO_ERROR &&
-+ msg->msg.data[0] != IPMI_ERR_RETURNING_REQ_BYTES &&
-+ msg->msg.data[0] != IPMI_ERR_PROVIDING_RESPONSE) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error 0x%x on cmd 0x%x/0x%x; state = %d; probably fatal.\n",
-+ msg->msg.data[0], msg->msg.netfn & 0xfe,
-+ msg->msg.cmd, bmc->state);
-+ } else {
-+ printk(KERN_DEBUG "ipmisensors: received message\n");
-+ ipmisensors_rcv_msg(bmc, &msg->msg);
-+ }
-+
-+ } else {
-+ printk(KERN_WARNING
-+ "ipmisensors: Response for non-registered BMC\n");
-+ if (bmc != NULL)
-+ printk(KERN_DEBUG "ipmisensors: BMC ID: %d\n",
-+ bmc->interface_id);
-+ else
-+ printk(KERN_DEBUG "ipmisensors: BMC NULL!\n");
-+ }
-+
-+ ipmi_free_recv_msg(msg);
-+}
-+
-+/****** IPMI Interface Initialization ******/
-+
-+/**
-+ * Return true if the given ipmi interface has been registered.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static int ipmisensors_intf_registered(int ipmi_intf)
-+{
-+ int found = 0;
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->interface_id == ipmi_intf) {
-+ found++;
-+ }
-+ }
-+
-+ return found;
-+}
-+
-+/**
-+ * Return true if the given BMC has been registered.
-+ *
-+ * @bmc: The BMC device.
-+ */
-+static int ipmisensors_bmc_registered(struct device *bmc)
-+{
-+ int found = 0;
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->dev == bmc) {
-+ found++;
-+ }
-+ }
-+
-+ return found;
-+}
-+
-+/**
-+ * Register new IPMI BMC interface. Interface indpendent callback created
-+ * for flexibility in adding new types of interface callbacks in future.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static void ipmisensors_register_bmc(int ipmi_intf, struct ipmi_addr *address)
-+{
-+ int error;
-+
-+ /* allocate a new ipmisensors_bmc_data struct */
-+
-+ struct ipmisensors_bmc_data *bmc = (struct ipmisensors_bmc_data *)
-+ kmalloc(sizeof(struct ipmisensors_bmc_data), GFP_KERNEL);
-+
-+ /* initialize members */
-+ INIT_LIST_HEAD(&bmc->sdrs);
-+ bmc->interface_id = ipmi_intf;
-+
-+ bmc->address = *address;
-+
-+ bmc->sdr_count = 0;
-+ bmc->msgid = 0;
-+ bmc->ipmi_sdr_partial_size = IPMI_CHUNK_SIZE;
-+ bmc->state = STATE_INIT;
-+ bmc->errorcount = 0;
-+ bmc->rx_msg_data_offset = 0;
-+ bmc->dev = ipmi_get_bmcdevice(ipmi_intf);
-+
-+ /* default to 3 second min update interval */
-+ bmc->update_period = 3;
-+
-+ if (bmc->dev == NULL) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, couldn't get BMC device for interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Create IPMI messaging interface user */
-+ error = ipmi_create_user(bmc->interface_id, &driver_data.ipmi_hndlrs,
-+ bmc, &bmc->user);
-+ if (error < 0) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, unable to register user with ipmi interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Register the BMC as a HWMON class device */
-+ bmc->class_dev = hwmon_device_register(bmc->dev);
-+
-+ if (IS_ERR(bmc->class_dev)) {
-+ printk(KERN_ERR
-+ "ipmisensors: Error, unable to register hwmon class device for interface %d\n",
-+ bmc->interface_id);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ /* Register the BMC in the driver */
-+ if (ipmisensors_bmc_registered(bmc->dev)) {
-+ printk(KERN_ERR
-+ "ipmisensors: BMC on interface %d already registered\n",
-+ bmc->interface_id);
-+ hwmon_device_unregister(bmc->class_dev);
-+ kfree(bmc);
-+ return;
-+ }
-+
-+ ipmi_get_version(bmc->user, &bmc->ipmi_version_major,
-+ &bmc->ipmi_version_minor);
-+
-+ /* finally add the new bmc data to the bmc data list */
-+ list_add_tail(&bmc->list, &driver_data.bmc_data);
-+ driver_data.interfaces++;
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Registered IPMI %d.%d BMC over interface %d\n",
-+ bmc->ipmi_version_major,
-+ bmc->ipmi_version_minor, bmc->interface_id);
-+
-+ /* Send a reserve SDR command to the bmc */
-+ ipmisensors_reserve_sdr(bmc);
-+
-+ /* initialize the bmc's update work struct */
-+ INIT_DELAYED_WORK(&bmc->update_work, ipmisensors_update_bmc);
-+}
-+
-+/**
-+ * Callback for when an IPMI BMC is gone. Interface indpendent callback created
-+ * for flexibility in adding new types of interface callbacks in future.
-+ *
-+ * @ipmi_intf: The IPMI interface number.
-+ */
-+static void ipmisensors_unregister_bmc(int ipmi_intf)
-+{
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ if (cursor->interface_id == ipmi_intf) {
-+ list_del(&cursor->list);
-+ printk(KERN_DEBUG
-+ "ipmisensors: cancelling queued work\n");
-+ /* cancel update work queued for this bmc */
-+ cancel_delayed_work(&cursor->update_work);
-+ printk(KERN_DEBUG
-+ "ipmisensors: waiting for update to finish\n");
-+ /* wait for readings to finish */
-+ while (cursor->state != STATE_DONE) ;
-+
-+ device_remove_file(cursor->dev,
-+ &cursor->alarms_attr.dev_attr);
-+ device_remove_file(cursor->dev,
-+ &cursor->update_attr.dev_attr);
-+ hwmon_device_unregister(cursor->class_dev);
-+ ipmisensors_sdr_cleanup(cursor);
-+ ipmi_destroy_user(cursor->user);
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Unegistered IPMI interface %d\n",
-+ cursor->interface_id);
-+
-+ kfree(cursor);
-+ driver_data.interfaces--;
-+ }
-+ }
-+
-+}
-+
-+/**
-+ * Unregister all registered bmcs.
-+ */
-+static void ipmisensors_unregister_bmc_all(void)
-+{
-+ struct ipmisensors_bmc_data *cursor, *next;
-+
-+ /* find and free the ipmisensors_bmc_data struct */
-+ list_for_each_entry_safe(cursor, next, &driver_data.bmc_data, list) {
-+ list_del(&cursor->list);
-+
-+ /* cancel update work queued for this bmc */
-+ printk(KERN_DEBUG "ipmisensors: cancelling queued work\n");
-+ cancel_delayed_work(&cursor->update_work);
-+
-+ printk(KERN_DEBUG
-+ "ipmisensors: waiting for update to finish\n");
-+ /* wait for readings to finish */
-+ while (cursor->state != STATE_DONE) ;
-+
-+ device_remove_file(cursor->dev, &cursor->alarms_attr.dev_attr);
-+ device_remove_file(cursor->dev, &cursor->update_attr.dev_attr);
-+ hwmon_device_unregister(cursor->class_dev);
-+ ipmisensors_sdr_cleanup(cursor);
-+ ipmi_destroy_user(cursor->user);
-+
-+ printk(KERN_INFO
-+ "ipmisensors: Unegistered IPMI interface %d\n",
-+ cursor->interface_id);
-+
-+ kfree(cursor);
-+ }
-+
-+ driver_data.interfaces = 0;
-+}
-+
-+/**
-+ * Callback for when a new IPMI SMI type interface is found.
-+ *
-+ * @if_num: The IPMI interface number.
-+ */
-+static void ipmisensors_new_smi(int if_num, struct device *dev)
-+{
-+ struct ipmi_addr smi_address = {
-+ IPMI_SYSTEM_INTERFACE_ADDR_TYPE,
-+ IPMI_BMC_CHANNEL,
-+ {0},
-+ };
-+
-+ /* calls the generic new interface function */
-+ ipmisensors_register_bmc(if_num, &smi_address);
-+}
-+
-+/**
-+ * Callback for when an exisiting IPMI SMI type interface is gone.
-+ *
-+ * @if_num: The IPMI interface number.
-+ */
-+static void ipmisensors_smi_gone(int if_num)
-+{
-+ if (driver_data.interfaces > 0) {
-+ ipmisensors_unregister_bmc(if_num);
-+ }
-+}
-+
-+/**
-+ * Initialize the module.
-+ */
-+static int __init ipmisensors_init(void)
-+{
-+ int error;
-+ printk(KERN_INFO "ipmisensors - IPMI BMC sensors interface\n");
-+
-+ /* init cache managers */
-+ driver_data.sdrdata_cache =
-+ kmem_cache_create("ipmisensors_sdrdata", sizeof(struct sdrdata), 0,
-+ 0, NULL, NULL);
-+ driver_data.sysfsattr_cache =
-+ kmem_cache_create("ipmisensors_sysfsattr",
-+ sizeof(struct ipmisensors_device_attribute), 0, 0,
-+ NULL, NULL);
-+
-+ if (!driver_data.sdrdata_cache || !driver_data.sysfsattr_cache) {
-+ if (driver_data.sdrdata_cache)
-+ kmem_cache_destroy(driver_data.sdrdata_cache);
-+ if (driver_data.sysfsattr_cache)
-+ kmem_cache_destroy(driver_data.sysfsattr_cache);
-+ return -ENOMEM;
-+ }
-+
-+ /* register IPMI interface callback(s) */
-+ error = ipmi_smi_watcher_register(&driver_data.smi_watcher);
-+ if (error) {
-+ printk(KERN_WARNING
-+ "ipmisensors: can't register smi watcher\n");
-+ return error;
-+ }
-+
-+ /* create work queue, keep it simple, single-threaded */
-+ ipmisensors_workqueue =
-+ create_singlethread_workqueue("ipmisensors_workqueue");
-+
-+ return 0;
-+}
-+
-+/**
-+ * Cleanup
-+ */
-+static void ipmisensors_cleanup(void)
-+{
-+ /* start cleanup */
-+ cleanup = 1;
-+
-+ /* unregister bmcs */
-+ printk(KERN_DEBUG "ipmisensors: unregister bmcs\n");
-+ ipmi_smi_watcher_unregister(&driver_data.smi_watcher);
-+ ipmisensors_unregister_bmc_all();
-+
-+ /* flush & destroy work queue */
-+ printk(KERN_DEBUG "ipmisensors: destroy workqueue\n");
-+ flush_workqueue(ipmisensors_workqueue);
-+ destroy_workqueue(ipmisensors_workqueue);
-+
-+ /* remove cache managers */
-+ if (driver_data.sdrdata_cache)
-+ kmem_cache_destroy(driver_data.sdrdata_cache);
-+ if (driver_data.sysfsattr_cache)
-+ kmem_cache_destroy(driver_data.sysfsattr_cache);
-+}
-+
-+/**
-+ * Cleanup and exit the module
-+ */
-+static void __exit ipmisensors_exit(void)
-+{
-+ ipmisensors_cleanup();
-+ printk(KERN_DEBUG "ipmisensors: cleanup finished\n");
-+}
-+
-+MODULE_AUTHOR("Yani Ioannou <yani.ioannou@gmail.com>");
-+MODULE_DESCRIPTION("IPMI BMC sensors");
-+MODULE_LICENSE("GPL");
-+
-+module_init(ipmisensors_init);
-+module_exit(ipmisensors_exit);
-diff -rduNp linux-2.6.22.1.oorig2/drivers/hwmon/ipmisensors.h linux-2.6.22.1/drivers/hwmon/ipmisensors.h
---- linux-2.6.22.1.oorig2/drivers/hwmon/ipmisensors.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/drivers/hwmon/ipmisensors.h 2007-07-24 14:22:26.000000000 +0200
-@@ -0,0 +1,240 @@
-+/*
-+ * ipmisensors.h - lm_sensors interface to IPMI sensors.
-+ *
-+ * Copyright (C) 2004-2006 Yani Ioannou <yani.ioannou@gmail.com>
-+ *
-+ * Adapted from bmcsensors (lm-sensors for linux 2.4)
-+ * bmcsensors (C) Mark D. Studebaker <mdsxyz123@yahoo.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ */
-+
-+#include <linux/ipmi.h>
-+#include <linux/list.h>
-+#include <linux/slab.h>
-+#include <linux/workqueue.h>
-+
-+/* SDR defs */
-+#define STYPE_TEMP 0x01
-+#define STYPE_VOLT 0x02
-+#define STYPE_CURR 0x03
-+#define STYPE_FAN 0x04
-+
-+#define SDR_LIMITS 8
-+#define SDR_MAX_ID_LENGTH 16
-+#define SDR_MAX_UNPACKED_ID_LENGTH ((SDR_MAX_ID_LENGTH * 4 / 3) + 2)
-+
-+/* the last sensor type we are interested in */
-+#define STYPE_MAX 4
-+
-+#define IPMI_SDR_SIZE 67
-+#define IPMI_CHUNK_SIZE 16
-+
-+#define MAX_FILENAME_LENGTH 30
-+
-+struct ipmisensors_device_attribute {
-+ struct device_attribute dev_attr;
-+ struct sdrdata *sdr;
-+};
-+#define to_ipmisensors_dev_attr(_dev_attr) \
-+ container_of(_dev_attr, struct ipmisensors_device_attribute, dev_attr)
-+
-+#define IPMISENSORS_DEVICE_ATTR(_name,_mode,_show,_store,_index) \
-+struct ipmisensors_attribute sensor_dev_attr_##_name = { \
-+ .dev_attr = __ATTR(_name,_mode,_show,_store), \
-+ .index = _index, \
-+}
-+
-+struct ipmisensors_bmc_device_attribute {
-+ struct device_attribute dev_attr;
-+ struct ipmisensors_bmc_data *bmc;
-+};
-+#define to_ipmisensors_bmc_dev_attr(_dev_attr) \
-+ container_of(_dev_attr, struct ipmisensors_bmc_device_attribute, dev_attr)
-+
-+/**
-+ * &struct_sdrdata stores the IPMI Sensor Data Record (SDR) data, as recieved from the BMC, along with the corresponding sysfs attributes
-+ */
-+struct sdrdata {
-+ struct list_head list;
-+ /* retrieved from SDR, not expected to change */
-+ /* Sensor Type Code */
-+ u8 stype;
-+ u8 number;
-+ /* Sensor Capability Code */
-+ u8 capab;
-+ u16 thresh_mask;
-+ u8 format;
-+ u8 linear;
-+ s16 m;
-+ s16 b;
-+ u8 k;
-+ u8 nominal;
-+ u8 limits[SDR_LIMITS];
-+ /* index into limits for reported upper and lower limit */
-+ int lim1, lim2;
-+ u8 lim1_write, lim2_write;
-+ u8 string_type;
-+ u8 id_length;
-+ u8 id[SDR_MAX_ID_LENGTH];
-+ /* retrieved from reading */
-+ u8 reading;
-+ u8 status;
-+ u8 thresholds;
-+ /* sensor's bmc */
-+ struct ipmisensors_bmc_data *bmc;
-+ /* sysfs entries */
-+ struct ipmisensors_device_attribute attr;
-+ char *attr_name;
-+ struct ipmisensors_device_attribute attr_min;
-+ char *attr_min_name;
-+ struct ipmisensors_device_attribute attr_max;
-+ char *attr_max_name;
-+ struct ipmisensors_device_attribute attr_label;
-+ char *attr_label_name;
-+
-+};
-+
-+/**
-+ * &struct_ipmisensors_data stores the data for the ipmisensors driver.
-+ */
-+struct ipmisensors_data {
-+ /* Driver struct */
-+ char *driver_name;
-+
-+ /* Linked list of ipmisensors_bmc_data structs, one for each BMC */
-+ struct list_head bmc_data;
-+
-+ /* Number of ipmi interfaces (and hence ipmisensors_data structs). */
-+ int interfaces;
-+
-+ /* IPMI kernel interface - SMI watcher */
-+ struct ipmi_smi_watcher smi_watcher;
-+
-+ /* IPMI kernel interface - user handlers */
-+ struct ipmi_user_hndl ipmi_hndlrs;
-+
-+ /* Cache manager for sdrdata cache */
-+ struct kmem_cache *sdrdata_cache;
-+
-+ /* Cache manager for ipmi_sensor_device_attribute cache */
-+ struct kmem_cache *sysfsattr_cache;
-+};
-+
-+/**
-+ * &states: enumeration of state codes for a bmc specific ipmisensors
-+ */
-+enum states {
-+ STATE_INIT,
-+ STATE_RESERVE,
-+ STATE_SDR,
-+ STATE_SDRPARTIAL,
-+ STATE_READING,
-+ STATE_UNCANCEL,
-+ STATE_SYSTABLE,
-+ STATE_DONE
-+};
-+
-+/**
-+ * &struct_ipmisensors_bmc_data stores the data for a particular IPMI BMC.
-+ */
-+struct ipmisensors_bmc_data {
-+ struct list_head list;
-+
-+ /* The IPMI interface number */
-+ int interface_id;
-+
-+ /* The IPMI address */
-+ struct ipmi_addr address;
-+
-+ /* List of sdrdata structs (sdrs) recieved from the BMC */
-+ struct list_head sdrs;
-+
-+ /* Count of the number of sdrs stored in the sdr list */
-+ int sdr_count;
-+
-+ /* next message id */
-+ int msgid;
-+
-+ /* The ipmi interface 'user' used to access this particular bmc */
-+ ipmi_user_t user;
-+
-+ /* BMC IPMI Version (major) */
-+ unsigned char ipmi_version_major;
-+
-+ /* BMC IPMI Version (minor) */
-+ unsigned char ipmi_version_minor;
-+
-+ /* The size of the SDR request message */
-+ int ipmi_sdr_partial_size;
-+
-+ /* transmit message buffer */
-+ struct kernel_ipmi_msg tx_message;
-+
-+ /* ipmi transmited data buffer */
-+ unsigned char tx_msg_data[IPMI_MAX_MSG_LENGTH + 50]; /* why the +50 in bmcsensors? */
-+
-+ /* ipmi recieved data buffer */
-+ unsigned char rx_msg_data[IPMI_MAX_MSG_LENGTH + 50];
-+
-+ /* current recieve buffer offset */
-+ int rx_msg_data_offset;
-+
-+ /* The id of then next SDR record to read during update cycle */
-+ u16 nextrecord;
-+
-+ /* BMC SDR Reservation ID */
-+ u16 resid;
-+
-+ /* Alarm status */
-+ u8 alarms;
-+
-+ /* The cumalative error count for this bmc */
-+ int errorcount;
-+
-+ /* The current state of this bmc w.r.t. ipmisensors (see enum states) */
-+ int state;
-+
-+ /* The current sdr for which a reading is pending */
-+ struct sdrdata *current_sdr;
-+
-+ /* The BMC's device struct */
-+ struct device *dev;
-+
-+ /* hwmon class device */
-+ struct class_device *class_dev;
-+
-+ /* hwmon device name */
-+ struct device_attribute name_attr;
-+
-+ /* alarms attribute */
-+ struct ipmisensors_bmc_device_attribute alarms_attr;
-+
-+ /* update_period attribute */
-+ struct ipmisensors_bmc_device_attribute update_attr;
-+
-+ /* lower bound on time between updates (in seconds) */
-+ unsigned int update_period;
-+
-+ /* semaphore used to do a headcount of the SDR readings we are waiting
-+ * on in a given bmc update */
-+ struct semaphore update_semaphore;
-+
-+ /* bmc's work struct for updating sensors */
-+ struct delayed_work update_work;
-+
-+ /* bmc's work struct for building the sysfs workqueue */
-+ struct work_struct sysfs_work;
-+};
-diff -rduNp linux-2.6.22.1.oorig2/include/linux/ipmi.h linux-2.6.22.1/include/linux/ipmi.h
---- linux-2.6.22.1.oorig2/include/linux/ipmi.h 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/include/linux/ipmi.h 2007-07-24 14:22:26.000000000 +0200
-@@ -300,6 +300,9 @@ int ipmi_create_user(unsigned int
- safe, too. */
- int ipmi_destroy_user(ipmi_user_t user);
-
-+/* Get the IPMI BMC's device struct */
-+struct device *ipmi_get_bmcdevice(int ipmi_intf);
-+
- /* Get the IPMI version of the BMC we are talking to. */
- void ipmi_get_version(ipmi_user_t user,
- unsigned char *major,
-diff -rduNp linux-2.6.22.1.oorig2/include/linux/ipmi_msgdefs.h linux-2.6.22.1/include/linux/ipmi_msgdefs.h
---- linux-2.6.22.1.oorig2/include/linux/ipmi_msgdefs.h 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/include/linux/ipmi_msgdefs.h 2007-07-24 14:22:26.000000000 +0200
-@@ -45,6 +45,7 @@
-
- #define IPMI_NETFN_APP_REQUEST 0x06
- #define IPMI_NETFN_APP_RESPONSE 0x07
-+#define IPMI_GET_DEVICE_GUID_CMD 0x08
- #define IPMI_GET_DEVICE_ID_CMD 0x01
- #define IPMI_COLD_RESET_CMD 0x02
- #define IPMI_WARM_RESET_CMD 0x03
-@@ -57,6 +58,11 @@
- #define IPMI_GET_BMC_GLOBAL_ENABLES_CMD 0x2f
- #define IPMI_READ_EVENT_MSG_BUFFER_CMD 0x35
- #define IPMI_GET_CHANNEL_INFO_CMD 0x42
-+#define IPMI_RESERVE_SDR 0x22
-+#define IPMI_GET_SDR 0x23
-+#define IPMI_GET_SENSOR_STATE_READING 0x2D
-+#define IPMI_SET_SENSOR_HYSTERESIS 0x24
-+#define IPMI_SET_SENSOR_THRESHOLD 0x26
-
- #define IPMI_NETFN_STORAGE_REQUEST 0x0a
- #define IPMI_NETFN_STORAGE_RESPONSE 0x0b
-@@ -79,10 +85,13 @@
- #define IPMI_NODE_BUSY_ERR 0xc0
- #define IPMI_INVALID_COMMAND_ERR 0xc1
- #define IPMI_TIMEOUT_ERR 0xc3
-+#define IPMI_INVALID_RESERVATION_ID 0xc5
- #define IPMI_ERR_MSG_TRUNCATED 0xc6
- #define IPMI_REQ_LEN_INVALID_ERR 0xc7
- #define IPMI_REQ_LEN_EXCEEDED_ERR 0xc8
- #define IPMI_NOT_IN_MY_STATE_ERR 0xd5 /* IPMI 2.0 */
-+#define IPMI_ERR_RETURNING_REQ_BYTES 0xca
-+#define IPMI_ERR_PROVIDING_RESPONSE 0xce
- #define IPMI_LOST_ARBITRATION_ERR 0x81
- #define IPMI_BUS_ERR 0x82
- #define IPMI_NAK_ON_WRITE_ERR 0x83
$(LINUX_HEADERS_UNPACK_DIR)/.patched: $(LINUX_HEADERS_UNPACK_DIR)/.unpacked $(LINUX_HEADERS_DEPENDS)
toolchain/patch-kernel.sh $(LINUX_HEADERS_UNPACK_DIR) toolchain/kernel-headers \
linux-$(LINUX_HEADERS_VERSION)-\*.patch{,.gz,.bz2}
-ifeq ($(BR2_KERNEL_HEADERS_IPMI),y)
- toolchain/patch-kernel.sh $(LINUX_HEADERS_UNPACK_DIR) toolchain/kernel-headers/ipmi \
- linux-$(LINUX_HEADERS_VERSION)-\*.patch{,.gz,.bz2}
-endif
-ifeq ($(BR2_KERNEL_HEADERS_LZMA),y)
- toolchain/patch-kernel.sh $(LINUX_HEADERS_UNPACK_DIR) toolchain/kernel-headers/lzma \
- linux-$(LINUX_HEADERS_VERSION)-\*.patch{,.gz,.bz2}
-endif
ifeq ($(BR2_KERNEL_HEADERS_RT),y)
toolchain/patch-kernel.sh $(LINUX_HEADERS_UNPACK_DIR) $(DL_DIR) $(LINUX_RT_SOURCE)
endif
+++ /dev/null
-diff --git a/.miniconfig b/.miniconfig
-new file mode 100644
-index 0000000..5686e53
---- /dev/null
-+++ b/.miniconfig
-@@ -0,0 +1,89 @@
-+#make allnoconfig KCONFIG_ALLCONFIG=miniconfig
-+CONFIG_X86_32=y
-+CONFIG_CLOCKSOURCE_WATCHDOG=y
-+CONFIG_LOCKDEP_SUPPORT=y
-+CONFIG_SEMAPHORE_SLEEPERS=y
-+CONFIG_MMU=y
-+CONFIG_GENERIC_ISA_DMA=y
-+CONFIG_GENERIC_HWEIGHT=y
-+CONFIG_DMI=y
-+CONFIG_INIT_ENV_ARG_LIMIT=32
-+CONFIG_IKCONFIG=y
-+CONFIG_IKCONFIG_PROC=y
-+CONFIG_SYSFS_DEPRECATED=y
-+CONFIG_BLK_DEV_INITRD=y
-+CONFIG_SYSCTL=y
-+CONFIG_EMBEDDED=y
-+CONFIG_PRINTK=y
-+CONFIG_BASE_SMALL=1
-+CONFIG_BLOCK=y
-+CONFIG_IOSCHED_NOOP=y
-+CONFIG_DEFAULT_IOSCHED="noop"
-+CONFIG_X86_GENERIC=y
-+CONFIG_X86_L1_CACHE_SHIFT=7
-+CONFIG_GENERIC_CALIBRATE_DELAY=y
-+CONFIG_X86_WP_WORKS_OK=y
-+CONFIG_X86_BSWAP=y
-+CONFIG_X86_CMPXCHG64=y
-+CONFIG_X86_INTEL_USERCOPY=y
-+CONFIG_X86_TSC=y
-+CONFIG_PREEMPT_NONE=y
-+CONFIG_VM86=y
-+CONFIG_HIGHMEM=y
-+CONFIG_FLATMEM=y
-+CONFIG_MTRR=y
-+CONFIG_HZ_250=y
-+CONFIG_PHYSICAL_ALIGN=0x100000
-+CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
-+CONFIG_PM=y
-+CONFIG_ACPI=y
-+CONFIG_ACPI_SLEEP=y
-+CONFIG_ACPI_BLACKLIST_YEAR=0
-+CONFIG_ACPI_EC=y
-+CONFIG_ACPI_SYSTEM=y
-+CONFIG_PCI=y
-+CONFIG_PCI_GOANY=y
-+CONFIG_PCI_DIRECT=y
-+CONFIG_BINFMT_ELF=y
-+CONFIG_STANDALONE=y
-+CONFIG_BLK_DEV_LOOP=y
-+CONFIG_IDE=y
-+CONFIG_IDE_MAX_HWIFS=2
-+CONFIG_BLK_DEV_IDE=y
-+CONFIG_BLK_DEV_IDEDISK=y
-+CONFIG_IDEDISK_MULTI_MODE=y
-+CONFIG_BLK_DEV_IDECD=y
-+CONFIG_IDE_GENERIC=y
-+CONFIG_INPUT_MOUSEDEV=y
-+CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
-+CONFIG_INPUT_KEYBOARD=y
-+CONFIG_KEYBOARD_ATKBD=y
-+CONFIG_SERIO=y
-+CONFIG_VT=y
-+CONFIG_VT_CONSOLE=y
-+CONFIG_UNIX98_PTYS=y
-+CONFIG_VGA_CONSOLE=y
-+CONFIG_USB_ARCH_HAS_HCD=y
-+CONFIG_USB_ARCH_HAS_EHCI=y
-+CONFIG_EXT2_FS=y
-+CONFIG_DNOTIFY=y
-+CONFIG_ISO9660_FS=y
-+CONFIG_FAT_FS=y
-+CONFIG_VFAT_FS=y
-+CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
-+CONFIG_PROC_FS=y
-+CONFIG_PROC_SYSCTL=y
-+CONFIG_SYSFS=y
-+CONFIG_RAMFS=y
-+CONFIG_SQUASHFS=y
-+CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3
-+CONFIG_MSDOS_PARTITION=y
-+CONFIG_NLS_DEFAULT="iso8859-1"
-+CONFIG_AUFS=y
-+CONFIG_AUFS_FAKE_DM=y
-+CONFIG_EARLY_PRINTK=y
-+CONFIG_DOUBLEFAULT=y
-+CONFIG_ZLIB_INFLATE=y
-+CONFIG_HAS_IOPORT=y
-+CONFIG_GENERIC_IRQ_PROBE=y
-+CONFIG_KTIME_SCALAR=y
-diff --git a/Makefile b/Makefile
-index d970cb1..a369204 100644
---- a/Makefile
-+++ b/Makefile
-@@ -188,7 +188,7 @@ CROSS_COMPILE ?=
- # Architecture as present in compile.h
- UTS_MACHINE := $(ARCH)
-
--KCONFIG_CONFIG ?= .config
-+KCONFIG_CONFIG ?= .miniconfig
-
- # SHELL used by kbuild
- CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
-diff --git a/arch/i386/boot/compressed/LzmaDecode.c b/arch/i386/boot/compressed/LzmaDecode.c
-new file mode 100644
-index 0000000..21bf40b
---- /dev/null
-+++ b/arch/i386/boot/compressed/LzmaDecode.c
-@@ -0,0 +1,588 @@
-+/*
-+ LzmaDecode.c
-+ LZMA Decoder (optimized for Speed version)
-+
-+ LZMA SDK 4.22 Copyright (c) 1999-2005 Igor Pavlov (2005-06-10)
-+ http://www.7-zip.org/
-+
-+ LZMA SDK is licensed under two licenses:
-+ 1) GNU Lesser General Public License (GNU LGPL)
-+ 2) Common Public License (CPL)
-+ It means that you can select one of these two licenses and
-+ follow rules of that license.
-+
-+ SPECIAL EXCEPTION:
-+ Igor Pavlov, as the author of this Code, expressly permits you to
-+ statically or dynamically link your Code (or bind by name) to the
-+ interfaces of this file without subjecting your linked Code to the
-+ terms of the CPL or GNU LGPL. Any modifications or additions
-+ to this file, however, are subject to the LGPL or CPL terms.
-+*/
-+
-+#include "LzmaDecode.h"
-+
-+#ifndef Byte
-+#define Byte unsigned char
-+#endif
-+
-+#define kNumTopBits 24
-+#define kTopValue ((UInt32)1 << kNumTopBits)
-+
-+#define kNumBitModelTotalBits 11
-+#define kBitModelTotal (1 << kNumBitModelTotalBits)
-+#define kNumMoveBits 5
-+
-+#define RC_READ_BYTE (*Buffer++)
-+
-+#define RC_INIT2 Code = 0; Range = 0xFFFFFFFF; \
-+ { int i; for(i = 0; i < 5; i++) { RC_TEST; Code = (Code << 8) | RC_READ_BYTE; }}
-+
-+#ifdef _LZMA_IN_CB
-+
-+#define RC_TEST { if (Buffer == BufferLim) \
-+ { SizeT size; int result = InCallback->Read(InCallback, &Buffer, &size); if (result != LZMA_RESULT_OK) return result; \
-+ BufferLim = Buffer + size; if (size == 0) return LZMA_RESULT_DATA_ERROR; }}
-+
-+#define RC_INIT Buffer = BufferLim = 0; RC_INIT2
-+
-+#else
-+
-+#define RC_TEST { if (Buffer == BufferLim) return LZMA_RESULT_DATA_ERROR; }
-+
-+#define RC_INIT(buffer, bufferSize) Buffer = buffer; BufferLim = buffer + bufferSize; RC_INIT2
-+
-+#endif
-+
-+#define RC_NORMALIZE if (Range < kTopValue) { RC_TEST; Range <<= 8; Code = (Code << 8) | RC_READ_BYTE; }
-+
-+#define IfBit0(p) RC_NORMALIZE; bound = (Range >> kNumBitModelTotalBits) * *(p); if (Code < bound)
-+#define UpdateBit0(p) Range = bound; *(p) += (kBitModelTotal - *(p)) >> kNumMoveBits;
-+#define UpdateBit1(p) Range -= bound; Code -= bound; *(p) -= (*(p)) >> kNumMoveBits;
-+
-+#define RC_GET_BIT2(p, mi, A0, A1) IfBit0(p) \
-+ { UpdateBit0(p); mi <<= 1; A0; } else \
-+ { UpdateBit1(p); mi = (mi + mi) + 1; A1; }
-+
-+#define RC_GET_BIT(p, mi) RC_GET_BIT2(p, mi, ; , ;)
-+
-+#define RangeDecoderBitTreeDecode(probs, numLevels, res) \
-+ { int i = numLevels; res = 1; \
-+ do { CProb *p = probs + res; RC_GET_BIT(p, res) } while(--i != 0); \
-+ res -= (1 << numLevels); }
-+
-+
-+#define kNumPosBitsMax 4
-+#define kNumPosStatesMax (1 << kNumPosBitsMax)
-+
-+#define kLenNumLowBits 3
-+#define kLenNumLowSymbols (1 << kLenNumLowBits)
-+#define kLenNumMidBits 3
-+#define kLenNumMidSymbols (1 << kLenNumMidBits)
-+#define kLenNumHighBits 8
-+#define kLenNumHighSymbols (1 << kLenNumHighBits)
-+
-+#define LenChoice 0
-+#define LenChoice2 (LenChoice + 1)
-+#define LenLow (LenChoice2 + 1)
-+#define LenMid (LenLow + (kNumPosStatesMax << kLenNumLowBits))
-+#define LenHigh (LenMid + (kNumPosStatesMax << kLenNumMidBits))
-+#define kNumLenProbs (LenHigh + kLenNumHighSymbols)
-+
-+
-+#define kNumStates 12
-+#define kNumLitStates 7
-+
-+#define kStartPosModelIndex 4
-+#define kEndPosModelIndex 14
-+#define kNumFullDistances (1 << (kEndPosModelIndex >> 1))
-+
-+#define kNumPosSlotBits 6
-+#define kNumLenToPosStates 4
-+
-+#define kNumAlignBits 4
-+#define kAlignTableSize (1 << kNumAlignBits)
-+
-+#define kMatchMinLen 2
-+
-+#define IsMatch 0
-+#define IsRep (IsMatch + (kNumStates << kNumPosBitsMax))
-+#define IsRepG0 (IsRep + kNumStates)
-+#define IsRepG1 (IsRepG0 + kNumStates)
-+#define IsRepG2 (IsRepG1 + kNumStates)
-+#define IsRep0Long (IsRepG2 + kNumStates)
-+#define PosSlot (IsRep0Long + (kNumStates << kNumPosBitsMax))
-+#define SpecPos (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))
-+#define Align (SpecPos + kNumFullDistances - kEndPosModelIndex)
-+#define LenCoder (Align + kAlignTableSize)
-+#define RepLenCoder (LenCoder + kNumLenProbs)
-+#define Literal (RepLenCoder + kNumLenProbs)
-+
-+#if Literal != LZMA_BASE_SIZE
-+StopCompilingDueBUG
-+#endif
-+
-+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size)
-+{
-+ unsigned char prop0;
-+ if (size < LZMA_PROPERTIES_SIZE)
-+ return LZMA_RESULT_DATA_ERROR;
-+ prop0 = propsData[0];
-+ if (prop0 >= (9 * 5 * 5))
-+ return LZMA_RESULT_DATA_ERROR;
-+ {
-+ for (propsRes->pb = 0; prop0 >= (9 * 5); propsRes->pb++, prop0 -= (9 * 5));
-+ for (propsRes->lp = 0; prop0 >= 9; propsRes->lp++, prop0 -= 9);
-+ propsRes->lc = prop0;
-+ /*
-+ unsigned char remainder = (unsigned char)(prop0 / 9);
-+ propsRes->lc = prop0 % 9;
-+ propsRes->pb = remainder / 5;
-+ propsRes->lp = remainder % 5;
-+ */
-+ }
-+
-+ #ifdef _LZMA_OUT_READ
-+ {
-+ int i;
-+ propsRes->DictionarySize = 0;
-+ for (i = 0; i < 4; i++)
-+ propsRes->DictionarySize += (UInt32)(propsData[1 + i]) << (i * 8);
-+ if (propsRes->DictionarySize == 0)
-+ propsRes->DictionarySize = 1;
-+ }
-+ #endif
-+ return LZMA_RESULT_OK;
-+}
-+
-+#define kLzmaStreamWasFinishedId (-1)
-+
-+int LzmaDecode(CLzmaDecoderState *vs,
-+ #ifdef _LZMA_IN_CB
-+ ILzmaInCallback *InCallback,
-+ #else
-+ const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
-+ #endif
-+ unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed)
-+{
-+ CProb *p = vs->Probs;
-+ SizeT nowPos = 0;
-+ Byte previousByte = 0;
-+ UInt32 posStateMask = (1 << (vs->Properties.pb)) - 1;
-+ UInt32 literalPosMask = (1 << (vs->Properties.lp)) - 1;
-+ int lc = vs->Properties.lc;
-+
-+ #ifdef _LZMA_OUT_READ
-+
-+ UInt32 Range = vs->Range;
-+ UInt32 Code = vs->Code;
-+ #ifdef _LZMA_IN_CB
-+ const Byte *Buffer = vs->Buffer;
-+ const Byte *BufferLim = vs->BufferLim;
-+ #else
-+ const Byte *Buffer = inStream;
-+ const Byte *BufferLim = inStream + inSize;
-+ #endif
-+ int state = vs->State;
-+ UInt32 rep0 = vs->Reps[0], rep1 = vs->Reps[1], rep2 = vs->Reps[2], rep3 = vs->Reps[3];
-+ int len = vs->RemainLen;
-+ UInt32 globalPos = vs->GlobalPos;
-+ UInt32 distanceLimit = vs->DistanceLimit;
-+
-+ Byte *dictionary = vs->Dictionary;
-+ UInt32 dictionarySize = vs->Properties.DictionarySize;
-+ UInt32 dictionaryPos = vs->DictionaryPos;
-+
-+ Byte tempDictionary[4];
-+
-+ #ifndef _LZMA_IN_CB
-+ *inSizeProcessed = 0;
-+ #endif
-+ *outSizeProcessed = 0;
-+ if (len == kLzmaStreamWasFinishedId)
-+ return LZMA_RESULT_OK;
-+
-+ if (dictionarySize == 0)
-+ {
-+ dictionary = tempDictionary;
-+ dictionarySize = 1;
-+ tempDictionary[0] = vs->TempDictionary[0];
-+ }
-+
-+ if (len == kLzmaNeedInitId)
-+ {
-+ {
-+ UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
-+ UInt32 i;
-+ for (i = 0; i < numProbs; i++)
-+ p[i] = kBitModelTotal >> 1;
-+ rep0 = rep1 = rep2 = rep3 = 1;
-+ state = 0;
-+ globalPos = 0;
-+ distanceLimit = 0;
-+ dictionaryPos = 0;
-+ dictionary[dictionarySize - 1] = 0;
-+ #ifdef _LZMA_IN_CB
-+ RC_INIT;
-+ #else
-+ RC_INIT(inStream, inSize);
-+ #endif
-+ }
-+ len = 0;
-+ }
-+ while(len != 0 && nowPos < outSize)
-+ {
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ outStream[nowPos++] = dictionary[dictionaryPos] = dictionary[pos];
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ len--;
-+ }
-+ if (dictionaryPos == 0)
-+ previousByte = dictionary[dictionarySize - 1];
-+ else
-+ previousByte = dictionary[dictionaryPos - 1];
-+
-+ #else /* if !_LZMA_OUT_READ */
-+
-+ int state = 0;
-+ UInt32 rep0 = 1, rep1 = 1, rep2 = 1, rep3 = 1;
-+ int len = 0;
-+ const Byte *Buffer;
-+ const Byte *BufferLim;
-+ UInt32 Range;
-+ UInt32 Code;
-+
-+ #ifndef _LZMA_IN_CB
-+ *inSizeProcessed = 0;
-+ #endif
-+ *outSizeProcessed = 0;
-+
-+ {
-+ UInt32 i;
-+ UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
-+ for (i = 0; i < numProbs; i++)
-+ p[i] = kBitModelTotal >> 1;
-+ }
-+
-+ #ifdef _LZMA_IN_CB
-+ RC_INIT;
-+ #else
-+ RC_INIT(inStream, inSize);
-+ #endif
-+
-+ #endif /* _LZMA_OUT_READ */
-+
-+ while(nowPos < outSize)
-+ {
-+ CProb *prob;
-+ UInt32 bound;
-+ int posState = (int)(
-+ (nowPos
-+ #ifdef _LZMA_OUT_READ
-+ + globalPos
-+ #endif
-+ )
-+ & posStateMask);
-+
-+ prob = p + IsMatch + (state << kNumPosBitsMax) + posState;
-+ IfBit0(prob)
-+ {
-+ int symbol = 1;
-+ UpdateBit0(prob)
-+ prob = p + Literal + (LZMA_LIT_SIZE *
-+ (((
-+ (nowPos
-+ #ifdef _LZMA_OUT_READ
-+ + globalPos
-+ #endif
-+ )
-+ & literalPosMask) << lc) + (previousByte >> (8 - lc))));
-+
-+ if (state >= kNumLitStates)
-+ {
-+ int matchByte;
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ matchByte = dictionary[pos];
-+ #else
-+ matchByte = outStream[nowPos - rep0];
-+ #endif
-+ do
-+ {
-+ int bit;
-+ CProb *probLit;
-+ matchByte <<= 1;
-+ bit = (matchByte & 0x100);
-+ probLit = prob + 0x100 + bit + symbol;
-+ RC_GET_BIT2(probLit, symbol, if (bit != 0) break, if (bit == 0) break)
-+ }
-+ while (symbol < 0x100);
-+ }
-+ while (symbol < 0x100)
-+ {
-+ CProb *probLit = prob + symbol;
-+ RC_GET_BIT(probLit, symbol)
-+ }
-+ previousByte = (Byte)symbol;
-+
-+ outStream[nowPos++] = previousByte;
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit < dictionarySize)
-+ distanceLimit++;
-+
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #endif
-+ if (state < 4) state = 0;
-+ else if (state < 10) state -= 3;
-+ else state -= 6;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRep + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ rep3 = rep2;
-+ rep2 = rep1;
-+ rep1 = rep0;
-+ state = state < kNumLitStates ? 0 : 3;
-+ prob = p + LenCoder;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRepG0 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ prob = p + IsRep0Long + (state << kNumPosBitsMax) + posState;
-+ IfBit0(prob)
-+ {
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos;
-+ #endif
-+ UpdateBit0(prob);
-+
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit == 0)
-+ #else
-+ if (nowPos == 0)
-+ #endif
-+ return LZMA_RESULT_DATA_ERROR;
-+
-+ state = state < kNumLitStates ? 9 : 11;
-+ #ifdef _LZMA_OUT_READ
-+ pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ previousByte = dictionary[pos];
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #else
-+ previousByte = outStream[nowPos - rep0];
-+ #endif
-+ outStream[nowPos++] = previousByte;
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit < dictionarySize)
-+ distanceLimit++;
-+ #endif
-+
-+ continue;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ }
-+ }
-+ else
-+ {
-+ UInt32 distance;
-+ UpdateBit1(prob);
-+ prob = p + IsRepG1 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ distance = rep1;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRepG2 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ distance = rep2;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ distance = rep3;
-+ rep3 = rep2;
-+ }
-+ rep2 = rep1;
-+ }
-+ rep1 = rep0;
-+ rep0 = distance;
-+ }
-+ state = state < kNumLitStates ? 8 : 11;
-+ prob = p + RepLenCoder;
-+ }
-+ {
-+ int numBits, offset;
-+ CProb *probLen = prob + LenChoice;
-+ IfBit0(probLen)
-+ {
-+ UpdateBit0(probLen);
-+ probLen = prob + LenLow + (posState << kLenNumLowBits);
-+ offset = 0;
-+ numBits = kLenNumLowBits;
-+ }
-+ else
-+ {
-+ UpdateBit1(probLen);
-+ probLen = prob + LenChoice2;
-+ IfBit0(probLen)
-+ {
-+ UpdateBit0(probLen);
-+ probLen = prob + LenMid + (posState << kLenNumMidBits);
-+ offset = kLenNumLowSymbols;
-+ numBits = kLenNumMidBits;
-+ }
-+ else
-+ {
-+ UpdateBit1(probLen);
-+ probLen = prob + LenHigh;
-+ offset = kLenNumLowSymbols + kLenNumMidSymbols;
-+ numBits = kLenNumHighBits;
-+ }
-+ }
-+ RangeDecoderBitTreeDecode(probLen, numBits, len);
-+ len += offset;
-+ }
-+
-+ if (state < 4)
-+ {
-+ int posSlot;
-+ state += kNumLitStates;
-+ prob = p + PosSlot +
-+ ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) <<
-+ kNumPosSlotBits);
-+ RangeDecoderBitTreeDecode(prob, kNumPosSlotBits, posSlot);
-+ if (posSlot >= kStartPosModelIndex)
-+ {
-+ int numDirectBits = ((posSlot >> 1) - 1);
-+ rep0 = (2 | ((UInt32)posSlot & 1));
-+ if (posSlot < kEndPosModelIndex)
-+ {
-+ rep0 <<= numDirectBits;
-+ prob = p + SpecPos + rep0 - posSlot - 1;
-+ }
-+ else
-+ {
-+ numDirectBits -= kNumAlignBits;
-+ do
-+ {
-+ RC_NORMALIZE
-+ Range >>= 1;
-+ rep0 <<= 1;
-+ if (Code >= Range)
-+ {
-+ Code -= Range;
-+ rep0 |= 1;
-+ }
-+ }
-+ while (--numDirectBits != 0);
-+ prob = p + Align;
-+ rep0 <<= kNumAlignBits;
-+ numDirectBits = kNumAlignBits;
-+ }
-+ {
-+ int i = 1;
-+ int mi = 1;
-+ do
-+ {
-+ CProb *prob3 = prob + mi;
-+ RC_GET_BIT2(prob3, mi, ; , rep0 |= i);
-+ i <<= 1;
-+ }
-+ while(--numDirectBits != 0);
-+ }
-+ }
-+ else
-+ rep0 = posSlot;
-+ if (++rep0 == (UInt32)(0))
-+ {
-+ /* it's for stream version */
-+ len = kLzmaStreamWasFinishedId;
-+ break;
-+ }
-+ }
-+
-+ len += kMatchMinLen;
-+ #ifdef _LZMA_OUT_READ
-+ if (rep0 > distanceLimit)
-+ #else
-+ if (rep0 > nowPos)
-+ #endif
-+ return LZMA_RESULT_DATA_ERROR;
-+
-+ #ifdef _LZMA_OUT_READ
-+ if (dictionarySize - distanceLimit > (UInt32)len)
-+ distanceLimit += len;
-+ else
-+ distanceLimit = dictionarySize;
-+ #endif
-+
-+ do
-+ {
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ previousByte = dictionary[pos];
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #else
-+ previousByte = outStream[nowPos - rep0];
-+ #endif
-+ len--;
-+ outStream[nowPos++] = previousByte;
-+ }
-+ while(len != 0 && nowPos < outSize);
-+ }
-+ }
-+ RC_NORMALIZE;
-+
-+ #ifdef _LZMA_OUT_READ
-+ vs->Range = Range;
-+ vs->Code = Code;
-+ vs->DictionaryPos = dictionaryPos;
-+ vs->GlobalPos = globalPos + (UInt32)nowPos;
-+ vs->DistanceLimit = distanceLimit;
-+ vs->Reps[0] = rep0;
-+ vs->Reps[1] = rep1;
-+ vs->Reps[2] = rep2;
-+ vs->Reps[3] = rep3;
-+ vs->State = state;
-+ vs->RemainLen = len;
-+ vs->TempDictionary[0] = tempDictionary[0];
-+ #endif
-+
-+ #ifdef _LZMA_IN_CB
-+ vs->Buffer = Buffer;
-+ vs->BufferLim = BufferLim;
-+ #else
-+ *inSizeProcessed = (SizeT)(Buffer - inStream);
-+ #endif
-+ *outSizeProcessed = nowPos;
-+ return LZMA_RESULT_OK;
-+}
-diff --git a/arch/i386/boot/compressed/LzmaDecode.h b/arch/i386/boot/compressed/LzmaDecode.h
-new file mode 100644
-index 0000000..213062a
---- /dev/null
-+++ b/arch/i386/boot/compressed/LzmaDecode.h
-@@ -0,0 +1,131 @@
-+/*
-+ LzmaDecode.h
-+ LZMA Decoder interface
-+
-+ LZMA SDK 4.21 Copyright (c) 1999-2005 Igor Pavlov (2005-06-08)
-+ http://www.7-zip.org/
-+
-+ LZMA SDK is licensed under two licenses:
-+ 1) GNU Lesser General Public License (GNU LGPL)
-+ 2) Common Public License (CPL)
-+ It means that you can select one of these two licenses and
-+ follow rules of that license.
-+
-+ SPECIAL EXCEPTION:
-+ Igor Pavlov, as the author of this code, expressly permits you to
-+ statically or dynamically link your code (or bind by name) to the
-+ interfaces of this file without subjecting your linked code to the
-+ terms of the CPL or GNU LGPL. Any modifications or additions
-+ to this file, however, are subject to the LGPL or CPL terms.
-+*/
-+
-+#ifndef __LZMADECODE_H
-+#define __LZMADECODE_H
-+
-+/* #define _LZMA_IN_CB */
-+/* Use callback for input data */
-+
-+/* #define _LZMA_OUT_READ */
-+/* Use read function for output data */
-+
-+/* #define _LZMA_PROB32 */
-+/* It can increase speed on some 32-bit CPUs,
-+ but memory usage will be doubled in that case */
-+
-+/* #define _LZMA_LOC_OPT */
-+/* Enable local speed optimizations inside code */
-+
-+/* #define _LZMA_SYSTEM_SIZE_T */
-+/* Use system's size_t. You can use it to enable 64-bit sizes supporting*/
-+
-+#ifndef UInt32
-+#ifdef _LZMA_UINT32_IS_ULONG
-+#define UInt32 unsigned long
-+#else
-+#define UInt32 unsigned int
-+#endif
-+#endif
-+
-+#ifndef SizeT
-+#ifdef _LZMA_SYSTEM_SIZE_T
-+#include <stddef.h>
-+#define SizeT size_t
-+#else
-+#define SizeT UInt32
-+#endif
-+#endif
-+
-+#ifdef _LZMA_PROB32
-+#define CProb UInt32
-+#else
-+#define CProb unsigned short
-+#endif
-+
-+#define LZMA_RESULT_OK 0
-+#define LZMA_RESULT_DATA_ERROR 1
-+
-+#ifdef _LZMA_IN_CB
-+typedef struct _ILzmaInCallback
-+{
-+ int (*Read)(void *object, const unsigned char **buffer, SizeT *bufferSize);
-+} ILzmaInCallback;
-+#endif
-+
-+#define LZMA_BASE_SIZE 1846
-+#define LZMA_LIT_SIZE 768
-+
-+#define LZMA_PROPERTIES_SIZE 5
-+
-+typedef struct _CLzmaProperties
-+{
-+ int lc;
-+ int lp;
-+ int pb;
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 DictionarySize;
-+ #endif
-+}CLzmaProperties;
-+
-+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size);
-+
-+#define LzmaGetNumProbs(Properties) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((Properties)->lc + (Properties)->lp)))
-+
-+#define kLzmaNeedInitId (-2)
-+
-+typedef struct _CLzmaDecoderState
-+{
-+ CLzmaProperties Properties;
-+ CProb *Probs;
-+
-+ #ifdef _LZMA_IN_CB
-+ const unsigned char *Buffer;
-+ const unsigned char *BufferLim;
-+ #endif
-+
-+ #ifdef _LZMA_OUT_READ
-+ unsigned char *Dictionary;
-+ UInt32 Range;
-+ UInt32 Code;
-+ UInt32 DictionaryPos;
-+ UInt32 GlobalPos;
-+ UInt32 DistanceLimit;
-+ UInt32 Reps[4];
-+ int State;
-+ int RemainLen;
-+ unsigned char TempDictionary[4];
-+ #endif
-+} CLzmaDecoderState;
-+
-+#ifdef _LZMA_OUT_READ
-+#define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; }
-+#endif
-+
-+int LzmaDecode(CLzmaDecoderState *vs,
-+ #ifdef _LZMA_IN_CB
-+ ILzmaInCallback *inCallback,
-+ #else
-+ const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
-+ #endif
-+ unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed);
-+
-+#endif
-diff --git a/arch/i386/boot/compressed/Makefile b/arch/i386/boot/compressed/Makefile
-index a661217..fb40869 100644
---- a/arch/i386/boot/compressed/Makefile
-+++ b/arch/i386/boot/compressed/Makefile
-@@ -4,15 +4,16 @@
- # create a compressed vmlinux image from the original vmlinux
- #
-
--targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o \
-- vmlinux.bin.all vmlinux.relocs
-+tragets := head.o lzma_misc.o piggy.o \
-+ vmlinux.bin.all vmlinux.relocs \
-+ vmlinux vmlinux.bin vmlinux.bin.gz
- EXTRA_AFLAGS := -traditional
-
- LDFLAGS_vmlinux := -T
--CFLAGS_misc.o += -fPIC
-+CFLAGS_lzma_misc.o += -fPIC
- hostprogs-y := relocs
-
--$(obj)/vmlinux: $(src)/vmlinux.lds $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
-+$(obj)/vmlinux: $(src)/vmlinux.lds $(obj)/head.o $(obj)/lzma_misc.o $(obj)/piggy.o FORCE
- $(call if_changed,ld)
- @:
-
-@@ -33,10 +34,10 @@ $(obj)/vmlinux.bin.all: $(vmlinux.bin.all-y) FORCE
-
- ifdef CONFIG_RELOCATABLE
- $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
-- $(call if_changed,gzip)
-+ $(call if_changed,lzma)
- else
- $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
-- $(call if_changed,gzip)
-+ $(call if_changed,lzma)
- endif
-
- LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
-diff --git a/arch/i386/boot/compressed/lzma_misc.c b/arch/i386/boot/compressed/lzma_misc.c
-new file mode 100644
-index 0000000..4f5f7f9
---- /dev/null
-+++ b/arch/i386/boot/compressed/lzma_misc.c
-@@ -0,0 +1,290 @@
-+/*
-+ * lzma_misc.c
-+ *
-+ * Decompress LZMA compressed vmlinuz
-+ * Version 0.9 Copyright (c) Ming-Ching Tiew mctiew@yahoo.com
-+ * Program adapted from misc.c for 2.6.20.1 kernel
-+ * Please refer to misc.c for authorship and copyright.
-+ * Date: 25 March 2007
-+ * Source released under GPL
-+ */
-+
-+#undef CONFIG_PARAVIRT
-+#include <linux/linkage.h>
-+#include <linux/vmalloc.h>
-+#include <linux/screen_info.h>
-+#include <asm/io.h>
-+#include <asm/page.h>
-+#include <asm/boot.h>
-+
-+/* WARNING!!
-+ * This code is compiled with -fPIC and it is relocated dynamically
-+ * at run time, but no relocation processing is performed.
-+ * This means that it is not safe to place pointers in static structures.
-+ */
-+
-+#define OF(args) args
-+#define STATIC static
-+
-+#undef memset
-+#undef memcpy
-+
-+typedef unsigned char uch;
-+typedef unsigned short ush;
-+typedef unsigned long ulg;
-+
-+#define WSIZE 0x80000000 /* Window size must be at least 32k,
-+ * and a power of two
-+ * We don't actually have a window just
-+ * a huge output buffer so I report
-+ * a 2G windows size, as that should
-+ * always be larger than our output buffer.
-+ */
-+
-+static uch *inbuf; /* input buffer */
-+static uch *window; /* Sliding window buffer, (and final output buffer) */
-+
-+static unsigned insize; /* valid bytes in inbuf */
-+static unsigned inptr; /* index of next byte to be processed in inbuf */
-+
-+/* gzip flag byte */
-+#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
-+#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
-+#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
-+#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
-+#define COMMENT 0x10 /* bit 4 set: file comment present */
-+#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
-+#define RESERVED 0xC0 /* bit 6,7: reserved */
-+
-+#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
-+
-+/* Diagnostic functions */
-+#ifdef DEBUG
-+# define Assert(cond,msg) {if(!(cond)) error(msg);}
-+# define Trace(x) fprintf x
-+# define Tracev(x) {if (verbose) fprintf x ;}
-+# define Tracevv(x) {if (verbose>1) fprintf x ;}
-+# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
-+# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
-+#else
-+# define Assert(cond,msg)
-+# define Trace(x)
-+# define Tracev(x)
-+# define Tracevv(x)
-+# define Tracec(c,x)
-+# define Tracecv(c,x)
-+#endif
-+
-+static int fill_inbuf(void);
-+static void error(char *m);
-+
-+/*
-+ * This is set up by the setup-routine at boot-time
-+ */
-+static unsigned char *real_mode; /* Pointer to real-mode data */
-+
-+#define RM_EXT_MEM_K (*(unsigned short *)(real_mode + 0x2))
-+#ifndef STANDARD_MEMORY_BIOS_CALL
-+#define RM_ALT_MEM_K (*(unsigned long *)(real_mode + 0x1e0))
-+#endif
-+#define RM_SCREEN_INFO (*(struct screen_info *)(real_mode+0))
-+
-+extern unsigned char input_data[];
-+extern int input_len;
-+
-+static long bytes_out = 0;
-+
-+static void *memcpy(void *dest, const void *src, unsigned n);
-+
-+static void putstr(const char *);
-+
-+static unsigned long free_mem_ptr;
-+static unsigned long free_mem_end_ptr;
-+
-+#define HEAP_SIZE 0x3000
-+
-+static char *vidmem = (char *)0xb8000;
-+static int vidport;
-+static int lines, cols;
-+
-+#ifdef CONFIG_X86_NUMAQ
-+void *xquad_portio;
-+#endif
-+
-+static void scroll(void)
-+{
-+ int i;
-+
-+ memcpy ( vidmem, vidmem + cols * 2, ( lines - 1 ) * cols * 2 );
-+ for ( i = ( lines - 1 ) * cols * 2; i < lines * cols * 2; i += 2 )
-+ vidmem[i] = ' ';
-+}
-+
-+static void putstr(const char *s)
-+{
-+ int x,y,pos;
-+ char c;
-+
-+ x = RM_SCREEN_INFO.orig_x;
-+ y = RM_SCREEN_INFO.orig_y;
-+
-+ while ( ( c = *s++ ) != '\0' ) {
-+ if ( c == '\n' ) {
-+ x = 0;
-+ if ( ++y >= lines ) {
-+ scroll();
-+ y--;
-+ }
-+ } else {
-+ vidmem [ ( x + cols * y ) * 2 ] = c;
-+ if ( ++x >= cols ) {
-+ x = 0;
-+ if ( ++y >= lines ) {
-+ scroll();
-+ y--;
-+ }
-+ }
-+ }
-+ }
-+
-+ RM_SCREEN_INFO.orig_x = x;
-+ RM_SCREEN_INFO.orig_y = y;
-+
-+ pos = (x + cols * y) * 2; /* Update cursor position */
-+ outb_p(14, vidport);
-+ outb_p(0xff & (pos >> 9), vidport+1);
-+ outb_p(15, vidport);
-+ outb_p(0xff & (pos >> 1), vidport+1);
-+}
-+
-+static void* memcpy(void* dest, const void* src, unsigned n)
-+{
-+ int i;
-+ char *d = (char *)dest, *s = (char *)src;
-+
-+ for (i=0;i<n;i++) d[i] = s[i];
-+ return dest;
-+}
-+
-+/* ===========================================================================
-+ * Fill the input buffer. This is called only when the buffer is empty
-+ * and at least one byte is really needed.
-+ */
-+static int fill_inbuf(void)
-+{
-+ error("ran out of input data");
-+ return 0;
-+}
-+
-+/* ===========================================================================
-+ */
-+static void error(char *x)
-+{
-+ putstr("\n\n");
-+ putstr(x);
-+ putstr("\n\n -- System halted");
-+
-+ while(1); /* Halt */
-+}
-+
-+#define _LZMA_IN_CB
-+#include "LzmaDecode.h"
-+#include "LzmaDecode.c"
-+
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize);
-+
-+/*
-+ * Do the lzma decompression
-+ */
-+static int lzma_unzip(uch* output)
-+{
-+
-+ unsigned int i;
-+ CLzmaDecoderState state;
-+ unsigned int uncompressedSize = 0;
-+ unsigned char* p;
-+
-+ ILzmaInCallback callback;
-+ callback.Read = read_byte;
-+
-+ // lzma args
-+ i = get_byte();
-+ state.Properties.lc = i % 9, i = i / 9;
-+ state.Properties.lp = i % 5, state.Properties.pb = i / 5;
-+
-+ // skip dictionary size
-+ for (i = 0; i < 4; i++)
-+ get_byte();
-+ // get uncompressed size
-+ p= (char*)&uncompressedSize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ // skip high order bytes
-+ for (i = 0; i < 4; i++)
-+ get_byte();
-+
-+ // Just point it beyond
-+ state.Probs = (CProb*) ( free_mem_ptr );
-+ // decompress kernel
-+ if (LzmaDecode( &state, &callback,
-+ (unsigned char*)output, uncompressedSize, &i) == LZMA_RESULT_OK)
-+ {
-+ if ( i != uncompressedSize )
-+ error( "kernel corrupted!\n");
-+ bytes_out = i;
-+ return 0;
-+ }
-+ return 1;
-+}
-+
-+
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize)
-+{
-+ static unsigned int i = 0;
-+ static unsigned char val;
-+ *bufferSize = 1;
-+ val = get_byte();
-+ *buffer = &val;
-+ return LZMA_RESULT_OK;
-+}
-+
-+asmlinkage void decompress_kernel(void *rmode, unsigned long end,
-+ uch *input_data, unsigned long input_len, uch *output)
-+{
-+ real_mode = rmode;
-+
-+ if (RM_SCREEN_INFO.orig_video_mode == 7) {
-+ vidmem = (char *) 0xb0000;
-+ vidport = 0x3b4;
-+ } else {
-+ vidmem = (char *) 0xb8000;
-+ vidport = 0x3d4;
-+ }
-+
-+ lines = RM_SCREEN_INFO.orig_video_lines;
-+ cols = RM_SCREEN_INFO.orig_video_cols;
-+
-+ window = output; /* Output buffer (Normally at 1M) */
-+ free_mem_ptr = end; /* Heap */
-+ free_mem_end_ptr = end + HEAP_SIZE;
-+ inbuf = input_data; /* Input buffer */
-+ insize = input_len;
-+ inptr = 0;
-+
-+ if ((u32)output & (CONFIG_PHYSICAL_ALIGN -1))
-+ error("Destination address not CONFIG_PHYSICAL_ALIGN aligned");
-+ if (end > ((-__PAGE_OFFSET-(512 <<20)-1) & 0x7fffffff))
-+ error("Destination address too large");
-+#ifndef CONFIG_RELOCATABLE
-+ if ((u32)output != LOAD_PHYSICAL_ADDR)
-+ error("Wrong destination address");
-+#endif
-+ if( lzma_unzip(output) != 0 )
-+ {
-+ error("inflate error\n");
-+ }
-+ putstr("Ok, booting the kernel.\n");
-+
-+ return;
-+}
-diff --git a/arch/i386/boot/compressed/vmlinux.scr b/arch/i386/boot/compressed/vmlinux.scr
-index 707a88f..9d67263 100644
---- a/arch/i386/boot/compressed/vmlinux.scr
-+++ b/arch/i386/boot/compressed/vmlinux.scr
-@@ -3,8 +3,8 @@ SECTIONS
- .data.compressed : {
- input_len = .;
- LONG(input_data_end - input_data) input_data = .;
-+ output_len = . + 5;
- *(.data)
-- output_len = . - 4;
- input_data_end = .;
- }
- }
-diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
-index 17ee97f..64b7bda 100644
---- a/drivers/block/Kconfig
-+++ b/drivers/block/Kconfig
-@@ -406,6 +406,47 @@ config BLK_DEV_RAM_BLOCKSIZE
- setups function - apparently needed by the rd_load_image routine
- that supposes the filesystem in the image uses a 1024 blocksize.
-
-+config LZMA_INITRD
-+ boolean "Allow LZMA compression on initrd"
-+ depends on BLK_DEV_INITRD=y
-+ default "y"
-+ help
-+ Use lzma compression on initrd, example 'lzma e initrd initrd.7z -d16'.
-+ If you have sufficient memory, you could compress using bigger dictionary size,
-+ 'lzma e initrd initrd.7z'.
-+
-+config LZMA_INITRD_KMALLOC_ONLY
-+ boolean "Use only kmalloc, do not use vmalloc on lzma initrd"
-+ depends on LZMA_INITRD=y
-+ default "n"
-+ help
-+ Set to y if you do not want to use vmalloc, ie use only kmalloc.
-+
-+config LZMA_INITRAM_FS
-+ boolean "Allow LZMA compression on initramfs"
-+ depends on BLK_DEV_RAM=y
-+ default "y"
-+ help
-+ Use lzma compression on initramfs, example 'lzma e initramfs.cpio initramfs.cpio.lzma'.
-+
-+config LZMA_INITRAM_FS_SMALLMEM
-+ boolean "Use lzma compression with small dictonary size."
-+ depends on LZMA_INITRAM_FS=y
-+ default "y"
-+ help
-+ Use lzma compression on initramfs with small dictionary size, example
-+ 'lzma e initramfs.cpio initramfs.cpio.lzma -d16'.
-+ Affects only the initramfs.cpio in the ~usr directory, which is compiled into
-+ the kernel. If you prepared initramfs.cpio for use with bootloader, you would
-+ need to specify the commandline options (-d16) yourself.
-+
-+config LZMA_INITRAM_FS_KMALLOC_ONLY
-+ boolean "Use only kmalloc, do not use vmalloc on lzma initramfs"
-+ depends on LZMA_INITRAM_FS=y
-+ default "n"
-+ help
-+ Set to y if you do not want to use vmalloc, ie use only kmalloc.
-+
- config CDROM_PKTCDVD
- tristate "Packet writing on CD/DVD media"
- depends on !UML
-diff --git a/fs/Kconfig b/fs/Kconfig
-index 3c4886b..bdcc6fb 100644
---- a/fs/Kconfig
-+++ b/fs/Kconfig
-@@ -1371,6 +1371,71 @@ config CRAMFS
-
- If unsure, say N.
-
-+config SQUASHFS
-+ tristate "SquashFS 3.2 - Squashed file system support"
-+ select ZLIB_INFLATE
-+ help
-+ Saying Y here includes support for SquashFS 3.2 (a Compressed Read-Only File
-+ System). Squashfs is a highly compressed read-only filesystem for Linux.
-+ It uses zlib compression to compress both files, inodes and directories.
-+ Inodes in the system are very small and all blocks are packed to minimise
-+ data overhead. Block sizes greater than 4K are supported up to a maximum of 64K.
-+ SquashFS 3.1 supports 64 bit filesystems and files (larger than 4GB), full
-+ uid/gid information, hard links and timestamps.
-+
-+ Squashfs is intended for general read-only filesystem use, for archival
-+ use (i.e. in cases where a .tar.gz file may be used), and in embedded
-+ systems where low overhead is needed. Further information and filesystem tools
-+ are available from http://squashfs.sourceforge.net.
-+
-+ If you want to compile this as a module ( = code which can be
-+ inserted in and removed from the running kernel whenever you want),
-+ say M here and read <file:Documentation/modules.txt>. The module
-+ will be called squashfs. Note that the root file system (the one
-+ containing the directory /) cannot be compiled as a module.
-+
-+ If unsure, say N.
-+
-+config SQUASHFS_EMBEDDED
-+
-+ bool "Additional options for memory-constrained systems"
-+ depends on SQUASHFS
-+ default n
-+ help
-+ Saying Y here allows you to specify cache sizes and how Squashfs
-+ allocates memory. This is only intended for memory constrained
-+ systems.
-+
-+ If unsure, say N.
-+
-+config SQUASHFS_FRAGMENT_CACHE_SIZE
-+ int "Number of fragments cached" if SQUASHFS_EMBEDDED
-+ depends on SQUASHFS
-+ default "3"
-+ help
-+ By default SquashFS caches the last 3 fragments read from
-+ the filesystem. Increasing this amount may mean SquashFS
-+ has to re-read fragments less often from disk, at the expense
-+ of extra system memory. Decreasing this amount will mean
-+ SquashFS uses less memory at the expense of extra reads from disk.
-+
-+ Note there must be at least one cached fragment. Anything
-+ much more than three will probably not make much difference.
-+
-+config SQUASHFS_VMALLOC
-+ bool "Use Vmalloc rather than Kmalloc" if SQUASHFS_EMBEDDED
-+ depends on SQUASHFS
-+ default n
-+ help
-+ By default SquashFS uses kmalloc to obtain fragment cache memory.
-+ Kmalloc memory is the standard kernel allocator, but it can fail
-+ on memory constrained systems. Because of the way Vmalloc works,
-+ Vmalloc can succeed when kmalloc fails. Specifying this option
-+ will make SquashFS always use Vmalloc to allocate the
-+ fragment cache memory.
-+
-+ If unsure, say N.
-+
- config VXFS_FS
- tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
- depends on BLOCK
-@@ -2057,3 +2122,4 @@ source "fs/dlm/Kconfig"
-
- endmenu
-
-+source "fs/aufs/Kconfig"
-diff --git a/fs/Makefile b/fs/Makefile
-index 9edf411..557766f 100644
---- a/fs/Makefile
-+++ b/fs/Makefile
-@@ -68,6 +68,7 @@ obj-$(CONFIG_JBD) += jbd/
- obj-$(CONFIG_JBD2) += jbd2/
- obj-$(CONFIG_EXT2_FS) += ext2/
- obj-$(CONFIG_CRAMFS) += cramfs/
-+obj-$(CONFIG_SQUASHFS) += squashfs/
- obj-$(CONFIG_RAMFS) += ramfs/
- obj-$(CONFIG_HUGETLBFS) += hugetlbfs/
- obj-$(CONFIG_CODA_FS) += coda/
-@@ -114,3 +115,4 @@ obj-$(CONFIG_HPPFS) += hppfs/
- obj-$(CONFIG_DEBUG_FS) += debugfs/
- obj-$(CONFIG_OCFS2_FS) += ocfs2/
- obj-$(CONFIG_GFS2_FS) += gfs2/
-+obj-$(CONFIG_AUFS) += aufs/
-diff --git a/fs/aufs/Kconfig b/fs/aufs/Kconfig
-new file mode 100644
-index 0000000..3a2121c
---- /dev/null
-+++ b/fs/aufs/Kconfig
-@@ -0,0 +1,73 @@
-+config AUFS
-+ tristate "Another unionfs"
-+ help
-+ Aufs is a stackable unification filesystem such as Unionfs,
-+ which unifies several directories and provides a merged single
-+ directory.
-+ In the early days, aufs was entirely re-designed and
-+ re-implemented Unionfs Version 1.x series. After many original
-+ ideas, approaches and improvements, it becomes totally
-+ different from Unionfs while keeping the basic features.
-+ See Unionfs for the basic features.
-+
-+if AUFS
-+comment "These options are generated automatically for "#UTS_RELEASE
-+
-+config AUFS_FAKE_DM
-+ bool "Use simplified (fake) nameidata"
-+ depends on AUFS
-+ default y
-+ help
-+ Faking nameidata (VFS internal data), you can get better performance
-+ in some cases.
-+
-+choice
-+ prompt "Maximum number of branches"
-+ depends on AUFS
-+ default AUFS_BRANCH_MAX_127
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+config AUFS_BRANCH_MAX_127
-+ bool "127"
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+config AUFS_BRANCH_MAX_511
-+ bool "511"
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+config AUFS_BRANCH_MAX_1023
-+ bool "1023"
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+
-+config AUFS_BRANCH_MAX_32767
-+ bool "32767"
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+endchoice
-+config AUFS_DEBUG
-+ bool "Debug aufs"
-+ depends on AUFS
-+ default y
-+ help
-+ Enable this to compile aufs internal debug code.
-+ The performance will be damaged.
-+
-+config AUFS_COMPAT
-+ bool "Compatibility with Unionfs (obsolete)"
-+ depends on AUFS
-+ default n
-+ help
-+ This makes aufs compatible with unionfs-style mount options and some
-+ behaviours.
-+ The dirs= mount option and =nfsro branch permission flag are always
-+ interpreted as br: mount option and =ro flag respectively. The
-+ 'debug', 'delete' and 'imap' mount options are ignored.
-+ If you disable this option, you will get,
-+ - aufs issues a warning about the ignored mount options
-+ - the default branch permission flag is set. RW for the first branch,
-+ and RO for the rests.
-+ - the name of a internal file which represents the directory is
-+ 'opaque', becomes '.wh..wh..opq'
-+ - the 'diropq=w' mount option is set by default
-+endif
-diff --git a/fs/aufs/Makefile b/fs/aufs/Makefile
-new file mode 100755
-index 0000000..0ee3cd0
---- /dev/null
-+++ b/fs/aufs/Makefile
-@@ -0,0 +1,18 @@
-+# AUFS Makefile for the Linux 2.6.16 and later
-+# $Id: Makefile,v 1.29 2007/04/23 00:59:50 sfjro Exp $
-+
-+obj-$(CONFIG_AUFS) += aufs.o
-+aufs-y := module.o super.o sbinfo.o xino.o \
-+ branch.o cpup.o whout.o plink.o wkq.o dcsub.o vfsub.o \
-+ opts.o \
-+ dentry.o dinfo.o \
-+ file.o f_op.o finfo.o \
-+ dir.o vdir.o \
-+ inode.o i_op.o i_op_add.o i_op_del.o i_op_ren.o iinfo.o \
-+ misc.o
-+#xattr.o
-+aufs-$(CONFIG_AUFS_SYSAUFS) += sysaufs.o
-+aufs-$(CONFIG_AUFS_HINOTIFY) += hinotify.o
-+aufs-$(CONFIG_AUFS_EXPORT) += export.o
-+#aufs-$(CONFIG_DEBUGFS) += dbgfs.o
-+aufs-$(CONFIG_AUFS_DEBUG) += debug.o
-diff --git a/fs/aufs/aufs.h b/fs/aufs/aufs.h
-new file mode 100755
-index 0000000..79b3b87
---- /dev/null
-+++ b/fs/aufs/aufs.h
-@@ -0,0 +1,64 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: aufs.h,v 1.24 2007/05/14 03:41:51 sfjro Exp $ */
-+
-+#ifndef __AUFS_H__
-+#define __AUFS_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/version.h>
-+
-+/* limited support before 2.6.16, curretly 2.6.15 only. */
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
-+#define atomic_long_t atomic_t
-+#define atomic_long_set atomic_set
-+#define timespec_to_ns(ts) ({(long long)(ts)->tv_sec;})
-+#define D_CHILD d_child
-+#else
-+#define D_CHILD d_u.d_child
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#include "debug.h"
-+
-+#include "branch.h"
-+#include "cpup.h"
-+#include "dcsub.h"
-+#include "dentry.h"
-+#include "dir.h"
-+#include "file.h"
-+#include "inode.h"
-+#include "misc.h"
-+#include "module.h"
-+#include "opts.h"
-+#include "super.h"
-+#include "sysaufs.h"
-+#include "vfsub.h"
-+#include "whout.h"
-+#include "wkq.h"
-+//#include "xattr.h"
-+
-+#if defined(CONFIG_AUFS_MODULE) && !defined(CONFIG_AUFS_KSIZE_PATCH)
-+#define ksize(p) (-1U)
-+#endif
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_H__ */
-diff --git a/fs/aufs/branch.c b/fs/aufs/branch.c
-new file mode 100755
-index 0000000..f1ce008
---- /dev/null
-+++ b/fs/aufs/branch.c
-@@ -0,0 +1,818 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: branch.c,v 1.49 2007/05/14 03:38:23 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include "aufs.h"
-+
-+static void free_branch(struct aufs_branch *br)
-+{
-+ TraceEnter();
-+
-+ if (br->br_xino)
-+ fput(br->br_xino);
-+ dput(br->br_wh);
-+ dput(br->br_plink);
-+ mntput(br->br_mnt);
-+ DEBUG_ON(br_count(br) || atomic_read(&br->br_wh_running));
-+ kfree(br);
-+}
-+
-+/*
-+ * frees all branches
-+ */
-+void free_branches(struct aufs_sbinfo *sbinfo)
-+{
-+ aufs_bindex_t bmax;
-+ struct aufs_branch **br;
-+
-+ TraceEnter();
-+ bmax = sbinfo->si_bend + 1;
-+ br = sbinfo->si_branch;
-+ while (bmax--)
-+ free_branch(*br++);
-+}
-+
-+/*
-+ * find the index of a branch which is specified by @br_id.
-+ */
-+int find_brindex(struct super_block *sb, aufs_bindex_t br_id)
-+{
-+ aufs_bindex_t bindex, bend;
-+
-+ TraceEnter();
-+
-+ bend = sbend(sb);
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (sbr_id(sb, bindex) == br_id)
-+ return bindex;
-+ return -1;
-+}
-+
-+/*
-+ * test if the @br is readonly or not.
-+ */
-+int br_rdonly(struct aufs_branch *br)
-+{
-+ return ((br->br_mnt->mnt_sb->s_flags & MS_RDONLY)
-+ || !br_writable(br->br_perm))
-+ ? -EROFS : 0;
-+}
-+
-+/*
-+ * returns writable branch index, otherwise an error.
-+ * todo: customizable writable-branch-policy
-+ */
-+static int find_rw_parent(struct dentry *dentry, aufs_bindex_t bend)
-+{
-+ int err;
-+ aufs_bindex_t bindex, candidate;
-+ struct super_block *sb;
-+ struct dentry *parent, *hidden_parent;
-+
-+ err = bend;
-+ sb = dentry->d_sb;
-+ parent = dget_parent(dentry);
-+#if 1 // branch policy
-+ hidden_parent = au_h_dptr_i(parent, bend);
-+ if (hidden_parent && !br_rdonly(stobr(sb, bend)))
-+ goto out; /* success */
-+#endif
-+
-+ candidate = -1;
-+ for (bindex = dbstart(parent); bindex <= bend; bindex++) {
-+ hidden_parent = au_h_dptr_i(parent, bindex);
-+ if (hidden_parent && !br_rdonly(stobr(sb, bindex))) {
-+#if 0 // branch policy
-+ if (candidate == -1)
-+ candidate = bindex;
-+ if (!au_test_perm(hidden_parent->d_inode, MAY_WRITE))
-+ return bindex;
-+#endif
-+ err = bindex;
-+ goto out; /* success */
-+ }
-+ }
-+#if 0 // branch policy
-+ err = candidate;
-+ if (candidate != -1)
-+ goto out; /* success */
-+#endif
-+ err = -EROFS;
-+
-+ out:
-+ dput(parent);
-+ return err;
-+}
-+
-+int find_rw_br(struct super_block *sb, aufs_bindex_t bend)
-+{
-+ aufs_bindex_t bindex;
-+
-+ for (bindex = bend; bindex >= 0; bindex--)
-+ if (!br_rdonly(stobr(sb, bindex)))
-+ return bindex;
-+ return -EROFS;
-+}
-+
-+int find_rw_parent_br(struct dentry *dentry, aufs_bindex_t bend)
-+{
-+ int err;
-+
-+ err = find_rw_parent(dentry, bend);
-+ if (err >= 0)
-+ return err;
-+ return find_rw_br(dentry->d_sb, bend);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * test if two hidden_dentries have overlapping branches.
-+ */
-+//todo: try is_subdir()
-+static int do_is_overlap(struct super_block *sb, struct dentry *hidden_d1,
-+ struct dentry *hidden_d2)
-+{
-+ struct dentry *d;
-+
-+ d = hidden_d1;
-+ do {
-+ if (unlikely(d == hidden_d2))
-+ return 1;
-+ d = d->d_parent; // dget_parent()
-+ } while (!IS_ROOT(d));
-+
-+ return (d == hidden_d2);
-+}
-+
-+#if defined(CONFIG_BLK_DEV_LOOP) || defined(CONFIG_BLK_DEV_LOOP_MODULE)
-+#include <linux/loop.h>
-+static int is_overlap_loopback(struct super_block *sb, struct dentry *hidden_d1,
-+ struct dentry *hidden_d2)
-+{
-+ struct inode *hidden_inode;
-+ struct loop_device *l;
-+
-+ hidden_inode = hidden_d1->d_inode;
-+ if (MAJOR(hidden_inode->i_sb->s_dev) != LOOP_MAJOR)
-+ return 0;
-+
-+ l = hidden_inode->i_sb->s_bdev->bd_disk->private_data;
-+ hidden_d1 = l->lo_backing_file->f_dentry;
-+ if (unlikely(hidden_d1->d_sb == sb))
-+ return 1;
-+ return do_is_overlap(sb, hidden_d1, hidden_d2);
-+}
-+#else
-+#define is_overlap_loopback(sb, hidden_d1, hidden_d2) 0
-+#endif
-+
-+static int is_overlap(struct super_block *sb, struct dentry *hidden_d1,
-+ struct dentry *hidden_d2)
-+{
-+ LKTRTrace("d1 %.*s, d2 %.*s\n", DLNPair(hidden_d1), DLNPair(hidden_d2));
-+ if (unlikely(hidden_d1 == hidden_d2))
-+ return 1;
-+ return do_is_overlap(sb, hidden_d1, hidden_d2)
-+ || do_is_overlap(sb, hidden_d2, hidden_d1)
-+ || is_overlap_loopback(sb, hidden_d1, hidden_d2)
-+ || is_overlap_loopback(sb, hidden_d2, hidden_d1);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int init_br_wh(struct super_block *sb, aufs_bindex_t bindex,
-+ struct aufs_branch *br, int new_perm,
-+ struct dentry *h_root, struct vfsmount *h_mnt)
-+{
-+ int err, old_perm;
-+ struct inode *dir = sb->s_root->d_inode,
-+ *h_dir = h_root->d_inode;
-+ const int new = (bindex < 0);
-+
-+ LKTRTrace("b%d, new_perm %d\n", bindex, new_perm);
-+
-+ if (new)
-+ hi_lock_parent(h_dir);
-+ else
-+ hdir_lock(h_dir, dir, bindex);
-+
-+ br_wh_write_lock(br);
-+ old_perm = br->br_perm;
-+ br->br_perm = new_perm;
-+ err = init_wh(h_root, br, au_do_nfsmnt(h_mnt), sb);
-+ br->br_perm = old_perm;
-+ br_wh_write_unlock(br);
-+
-+ if (new)
-+ i_unlock(h_dir);
-+ else
-+ hdir_unlock(h_dir, dir, bindex);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * returns a newly allocated branch. @new_nbranch is a number of branches
-+ * after adding a branch.
-+ */
-+static struct aufs_branch *alloc_addbr(struct super_block *sb, int new_nbranch)
-+{
-+ struct aufs_branch **branchp, *add_branch;
-+ int sz;
-+ void *p;
-+ struct dentry *root;
-+ struct inode *inode;
-+ struct aufs_hinode *hinodep;
-+ struct aufs_hdentry *hdentryp;
-+
-+ LKTRTrace("new_nbranch %d\n", new_nbranch);
-+ SiMustWriteLock(sb);
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ inode = root->d_inode;
-+ IiMustWriteLock(inode);
-+
-+ add_branch = kmalloc(sizeof(*add_branch), GFP_KERNEL);
-+ //if (LktrCond) {kfree(add_branch); add_branch = NULL;}
-+ if (unlikely(!add_branch))
-+ goto out;
-+
-+ sz = sizeof(*branchp) * (new_nbranch - 1);
-+ if (unlikely(!sz))
-+ sz = sizeof(*branchp);
-+ p = stosi(sb)->si_branch;
-+ branchp = au_kzrealloc(p, sz, sizeof(*branchp) * new_nbranch,
-+ GFP_KERNEL);
-+ //if (LktrCond) branchp = NULL;
-+ if (unlikely(!branchp))
-+ goto out;
-+ stosi(sb)->si_branch = branchp;
-+
-+ sz = sizeof(*hdentryp) * (new_nbranch - 1);
-+ if (unlikely(!sz))
-+ sz = sizeof(*hdentryp);
-+ p = dtodi(root)->di_hdentry;
-+ hdentryp = au_kzrealloc(p, sz, sizeof(*hdentryp) * new_nbranch,
-+ GFP_KERNEL);
-+ //if (LktrCond) hdentryp = NULL;
-+ if (unlikely(!hdentryp))
-+ goto out;
-+ dtodi(root)->di_hdentry = hdentryp;
-+
-+ sz = sizeof(*hinodep) * (new_nbranch - 1);
-+ if (unlikely(!sz))
-+ sz = sizeof(*hinodep);
-+ p = itoii(inode)->ii_hinode;
-+ hinodep = au_kzrealloc(p, sz, sizeof(*hinodep) * new_nbranch,
-+ GFP_KERNEL);
-+ //if (LktrCond) hinodep = NULL; // unavailable test
-+ if (unlikely(!hinodep))
-+ goto out;
-+ itoii(inode)->ii_hinode = hinodep;
-+ return add_branch; /* success */
-+
-+ out:
-+ kfree(add_branch);
-+ TraceErr(-ENOMEM);
-+ return ERR_PTR(-ENOMEM);
-+}
-+
-+/*
-+ * test if the branch permission is legal or not.
-+ */
-+static int test_br(struct super_block *sb, struct inode *inode, int brperm,
-+ char *path)
-+{
-+ int err;
-+
-+ err = 0;
-+ if (unlikely(br_writable(brperm) && IS_RDONLY(inode))) {
-+ Err("write permission for readonly fs or inode, %s\n", path);
-+ err = -EINVAL;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * retunrs,,,
-+ * 0: success, the caller will add it
-+ * plus: success, it is already unified, the caller should ignore it
-+ * minus: error
-+ */
-+static int test_add(struct super_block *sb, struct opt_add *add, int remount)
-+{
-+ int err;
-+ struct dentry *root;
-+ struct inode *inode, *hidden_inode;
-+ aufs_bindex_t bend, bindex;
-+
-+ LKTRTrace("%s, remo%d\n", add->path, remount);
-+
-+ root = sb->s_root;
-+ if (unlikely(au_find_dbindex(root, add->nd.dentry) != -1)) {
-+ err = 1;
-+ if (!remount) {
-+ err = -EINVAL;
-+ Err("%s duplicated\n", add->path);
-+ }
-+ goto out;
-+ }
-+
-+ err = -ENOSPC; //-E2BIG;
-+ bend = sbend(sb);
-+ //if (LktrCond) bend = AUFS_BRANCH_MAX;
-+ if (unlikely(AUFS_BRANCH_MAX <= add->bindex
-+ || AUFS_BRANCH_MAX - 1 <= bend)) {
-+ Err("number of branches exceeded %s\n", add->path);
-+ goto out;
-+ }
-+
-+ err = -EDOM;
-+ if (unlikely(add->bindex < 0 || bend + 1 < add->bindex)) {
-+ Err("bad index %d\n", add->bindex);
-+ goto out;
-+ }
-+
-+ inode = add->nd.dentry->d_inode;
-+ DEBUG_ON(!inode || !S_ISDIR(inode->i_mode));
-+ err = -ENOENT;
-+ if (unlikely(!inode->i_nlink)) {
-+ Err("no existence %s\n", add->path);
-+ goto out;
-+ }
-+
-+ err = -EINVAL;
-+ if (unlikely(inode->i_sb == sb)) {
-+ Err("%s must be outside\n", add->path);
-+ goto out;
-+ }
-+
-+#if 1 //ndef CONFIG_AUFS_ROBR
-+ if (unlikely(au_is_aufs(inode->i_sb)
-+ || !strcmp(au_sbtype(inode->i_sb), "unionfs"))) {
-+ Err("nested " AUFS_NAME " %s\n", add->path);
-+ goto out;
-+ }
-+#endif
-+
-+#ifdef AuNoNfsBranch
-+ if (unlikely(au_is_nfs(inode->i_sb))) {
-+ Err(AuNoNfsBranchMsg ". %s\n", add->path);
-+ goto out;
-+ }
-+#endif
-+
-+ err = test_br(sb, add->nd.dentry->d_inode, add->perm, add->path);
-+ if (unlikely(err))
-+ goto out;
-+
-+ if (unlikely(bend == -1))
-+ return 0; /* success */
-+
-+ hidden_inode = au_h_dptr(root)->d_inode;
-+ if (unlikely(au_flag_test(sb, AuFlag_WARN_PERM)
-+ && ((hidden_inode->i_mode & S_IALLUGO)
-+ != (inode->i_mode & S_IALLUGO)
-+ || hidden_inode->i_uid != inode->i_uid
-+ || hidden_inode->i_gid != inode->i_gid)))
-+ Warn("uid/gid/perm %s %u/%u/0%o, %u/%u/0%o\n",
-+ add->path,
-+ inode->i_uid, inode->i_gid, (inode->i_mode & S_IALLUGO),
-+ hidden_inode->i_uid, hidden_inode->i_gid,
-+ (hidden_inode->i_mode & S_IALLUGO));
-+
-+ err = -EINVAL;
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (unlikely(is_overlap(sb, add->nd.dentry,
-+ au_h_dptr_i(root, bindex)))) {
-+ Err("%s is overlapped\n", add->path);
-+ goto out;
-+ }
-+ err = 0;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int br_add(struct super_block *sb, struct opt_add *add, int remount)
-+{
-+ int err, sz;
-+ aufs_bindex_t bend, add_bindex;
-+ struct dentry *root;
-+ struct aufs_iinfo *iinfo;
-+ struct aufs_sbinfo *sbinfo;
-+ struct aufs_dinfo *dinfo;
-+ struct inode *root_inode;
-+ unsigned long long maxb;
-+ struct aufs_branch **branchp, *add_branch;
-+ struct aufs_hdentry *hdentryp;
-+ struct aufs_hinode *hinodep;
-+
-+ LKTRTrace("b%d, %s, 0x%x, %.*s\n", add->bindex, add->path,
-+ add->perm, DLNPair(add->nd.dentry));
-+ SiMustWriteLock(sb);
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ root_inode = root->d_inode;
-+ IMustLock(root_inode);
-+ IiMustWriteLock(root_inode);
-+
-+ err = test_add(sb, add, remount);
-+ if (unlikely(err < 0))
-+ goto out;
-+ if (unlikely(err))
-+ return 0; /* success */
-+
-+ bend = sbend(sb);
-+ add_branch = alloc_addbr(sb, bend + 2);
-+ err = PTR_ERR(add_branch);
-+ if (IS_ERR(add_branch))
-+ goto out;
-+
-+ err = 0;
-+ rw_init_nolock(&add_branch->br_wh_rwsem);
-+ add_branch->br_wh = add_branch->br_plink = NULL;
-+ if (unlikely(br_writable(add->perm))) {
-+ err = init_br_wh(sb, /*bindex*/-1, add_branch, add->perm,
-+ add->nd.dentry, add->nd.mnt);
-+ if (unlikely(err)) {
-+ kfree(add_branch);
-+ goto out;
-+ }
-+ }
-+ add_branch->br_xino = NULL;
-+ add_branch->br_mnt = mntget(add->nd.mnt);
-+ atomic_set(&add_branch->br_wh_running, 0);
-+ add_branch->br_id = new_br_id(sb);
-+ add_branch->br_perm = add->perm;
-+ atomic_set(&add_branch->br_count, 0);
-+
-+ sbinfo = stosi(sb);
-+ dinfo = dtodi(root);
-+ iinfo = itoii(root_inode);
-+
-+ add_bindex = add->bindex;
-+ sz = sizeof(*(sbinfo->si_branch)) * (bend + 1 - add_bindex);
-+ branchp = sbinfo->si_branch + add_bindex;
-+ memmove(branchp + 1, branchp, sz);
-+ *branchp = add_branch;
-+ sz = sizeof(*hdentryp) * (bend + 1 - add_bindex);
-+ hdentryp = dinfo->di_hdentry + add_bindex;
-+ memmove(hdentryp + 1, hdentryp, sz);
-+ hdentryp->hd_dentry = NULL;
-+ sz = sizeof(*hinodep) * (bend + 1 - add_bindex);
-+ hinodep = iinfo->ii_hinode + add_bindex;
-+ memmove(hinodep + 1, hinodep, sz);
-+ hinodep->hi_inode = NULL;
-+ hinodep->hi_notify = NULL;
-+
-+ sbinfo->si_bend++;
-+ dinfo->di_bend++;
-+ iinfo->ii_bend++;
-+ if (unlikely(bend == -1)) {
-+ dinfo->di_bstart = 0;
-+ iinfo->ii_bstart = 0;
-+ }
-+ set_h_dptr(root, add_bindex, dget(add->nd.dentry));
-+ set_h_iptr(root_inode, add_bindex, igrab(add->nd.dentry->d_inode), 0);
-+ if (!add_bindex)
-+ au_cpup_attr_all(root_inode);
-+ else
-+ au_add_nlink(root_inode, add->nd.dentry->d_inode);
-+ maxb = add->nd.dentry->d_sb->s_maxbytes;
-+ if (sb->s_maxbytes < maxb)
-+ sb->s_maxbytes = maxb;
-+
-+ if (au_flag_test(sb, AuFlag_XINO)) {
-+ struct file *base_file = stobr(sb, 0)->br_xino;
-+ if (!add_bindex)
-+ base_file = stobr(sb, 1)->br_xino;
-+ err = xino_init(sb, add_bindex, base_file, /*do_test*/1);
-+ if (unlikely(err)) {
-+ DEBUG_ON(add_branch->br_xino);
-+ Err("ignored xino err %d, force noxino\n", err);
-+ err = 0;
-+ au_flag_clr(sb, AuFlag_XINO);
-+ }
-+ }
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * test if the branch is deletable or not.
-+ */
-+static int test_children_busy(struct dentry *root, aufs_bindex_t bindex)
-+{
-+ int err, i, j, sigen;
-+ struct au_dcsub_pages dpages;
-+
-+ LKTRTrace("b%d\n", bindex);
-+ SiMustWriteLock(root->d_sb);
-+ DiMustWriteLock(root);
-+
-+ err = au_dpages_init(&dpages, GFP_KERNEL);
-+ if (unlikely(err))
-+ goto out;
-+ err = au_dcsub_pages(&dpages, root, NULL, NULL);
-+ if (unlikely(err))
-+ goto out_dpages;
-+
-+ sigen = au_sigen(root->d_sb);
-+ DiMustNoWaiters(root);
-+ IiMustNoWaiters(root->d_inode);
-+ di_write_unlock(root);
-+ for (i = 0; !err && i < dpages.ndpage; i++) {
-+ struct au_dpage *dpage;
-+ dpage = dpages.dpages + i;
-+ for (j = 0; !err && j < dpage->ndentry; j++) {
-+ struct dentry *d;
-+
-+ d = dpage->dentries[j];
-+ if (au_digen(d) == sigen)
-+ di_read_lock_child(d, AUFS_I_RLOCK);
-+ else {
-+ di_write_lock_child(d);
-+ err = au_reval_dpath(d, sigen);
-+ if (!err)
-+ di_downgrade_lock(d, AUFS_I_RLOCK);
-+ else {
-+ di_write_unlock(d);
-+ break;
-+ }
-+ }
-+
-+ if (au_h_dptr_i(d, bindex)
-+ && (!S_ISDIR(d->d_inode->i_mode)
-+ || dbstart(d) == dbend(d)))
-+ err = -EBUSY;
-+ di_read_unlock(d, AUFS_I_RLOCK);
-+ if (err)
-+ LKTRTrace("%.*s\n", DLNPair(d));
-+ }
-+ }
-+ di_write_lock_child(root); /* aufs_write_lock() calls ..._child() */
-+
-+ out_dpages:
-+ au_dpages_free(&dpages);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int br_del(struct super_block *sb, struct opt_del *del, int remount)
-+{
-+ int err, do_wh, rerr;
-+ struct dentry *root;
-+ struct inode *inode, *hidden_dir;
-+ aufs_bindex_t bindex, bend, br_id;
-+ struct aufs_sbinfo *sbinfo;
-+ struct aufs_dinfo *dinfo;
-+ struct aufs_iinfo *iinfo;
-+ struct aufs_branch *br;
-+
-+ LKTRTrace("%s, %.*s\n", del->path, DLNPair(del->h_root));
-+ SiMustWriteLock(sb);
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ inode = root->d_inode;
-+ IiMustWriteLock(inode);
-+
-+ bindex = au_find_dbindex(root, del->h_root);
-+ if (unlikely(bindex < 0)) {
-+ if (remount)
-+ return 0; /* success */
-+ err = -ENOENT;
-+ Err("%s no such branch\n", del->path);
-+ goto out;
-+ }
-+ LKTRTrace("bindex b%d\n", bindex);
-+
-+ err = -EBUSY;
-+ bend = sbend(sb);
-+ br = stobr(sb, bindex);
-+ if (unlikely(!bend || br_count(br))) {
-+ LKTRTrace("bend %d, br_count %d\n", bend, br_count(br));
-+ goto out;
-+ }
-+
-+ do_wh = 0;
-+ hidden_dir = del->h_root->d_inode;
-+ if (unlikely(br->br_wh || br->br_plink)) {
-+#if 0
-+ /* remove whiteout base */
-+ err = init_br_wh(sb, bindex, br, AuBr_RO, del->h_root,
-+ br->br_mnt);
-+ if (unlikely(err))
-+ goto out;
-+#else
-+ dput(br->br_wh);
-+ dput(br->br_plink);
-+ br->br_wh = br->br_plink = NULL;
-+#endif
-+ do_wh = 1;
-+ }
-+
-+ err = test_children_busy(root, bindex);
-+ if (unlikely(err)) {
-+ if (unlikely(do_wh))
-+ goto out_wh;
-+ goto out;
-+ }
-+
-+ err = 0;
-+ sbinfo = stosi(sb);
-+ dinfo = dtodi(root);
-+ iinfo = itoii(inode);
-+
-+ dput(au_h_dptr_i(root, bindex));
-+ aufs_hiput(iinfo->ii_hinode + bindex);
-+ br_id = br->br_id;
-+ free_branch(br);
-+
-+ //todo: realloc and shrink memeory
-+ if (bindex < bend) {
-+ const aufs_bindex_t n = bend - bindex;
-+ struct aufs_branch **brp;
-+ struct aufs_hdentry *hdp;
-+ struct aufs_hinode *hip;
-+
-+ brp = sbinfo->si_branch + bindex;
-+ memmove(brp, brp + 1, sizeof(*brp) * n);
-+ hdp = dinfo->di_hdentry + bindex;
-+ memmove(hdp, hdp + 1, sizeof(*hdp) * n);
-+ hip = iinfo->ii_hinode + bindex;
-+ memmove(hip, hip + 1, sizeof(*hip) * n);
-+ }
-+ sbinfo->si_branch[0 + bend] = NULL;
-+ dinfo->di_hdentry[0 + bend].hd_dentry = NULL;
-+ iinfo->ii_hinode[0 + bend].hi_inode = NULL;
-+ iinfo->ii_hinode[0 + bend].hi_notify = NULL;
-+
-+ sbinfo->si_bend--;
-+ dinfo->di_bend--;
-+ iinfo->ii_bend--;
-+ if (!bindex)
-+ au_cpup_attr_all(inode);
-+ else
-+ au_sub_nlink(inode, del->h_root->d_inode);
-+ if (au_flag_test(sb, AuFlag_PLINK))
-+ half_refresh_plink(sb, br_id);
-+
-+ if (sb->s_maxbytes == del->h_root->d_sb->s_maxbytes) {
-+ bend--;
-+ sb->s_maxbytes = 0;
-+ for (bindex = 0; bindex <= bend; bindex++) {
-+ unsigned long long maxb;
-+ maxb = sbr_sb(sb, bindex)->s_maxbytes;
-+ if (sb->s_maxbytes < maxb)
-+ sb->s_maxbytes = maxb;
-+ }
-+ }
-+ goto out; /* success */
-+
-+ out_wh:
-+ /* revert */
-+ rerr = init_br_wh(sb, bindex, br, br->br_perm, del->h_root, br->br_mnt);
-+ if (rerr)
-+ Warn("failed re-creating base whiteout, %s. (%d)\n",
-+ del->path, rerr);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int do_need_sigen_inc(int a, int b)
-+{
-+ return (br_whable(a) && !br_whable(b));
-+}
-+
-+static int need_sigen_inc(int old, int new)
-+{
-+ return (do_need_sigen_inc(old, new)
-+ || do_need_sigen_inc(new, old));
-+}
-+
-+int br_mod(struct super_block *sb, struct opt_mod *mod, int remount,
-+ int *do_update)
-+{
-+ int err;
-+ struct dentry *root;
-+ aufs_bindex_t bindex;
-+ struct aufs_branch *br;
-+ struct inode *hidden_dir;
-+
-+ LKTRTrace("%s, %.*s, 0x%x\n",
-+ mod->path, DLNPair(mod->h_root), mod->perm);
-+ SiMustWriteLock(sb);
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ IiMustWriteLock(root->d_inode);
-+
-+ bindex = au_find_dbindex(root, mod->h_root);
-+ if (unlikely(bindex < 0)) {
-+ if (remount)
-+ return 0; /* success */
-+ err = -ENOENT;
-+ Err("%s no such branch\n", mod->path);
-+ goto out;
-+ }
-+ LKTRTrace("bindex b%d\n", bindex);
-+
-+ hidden_dir = mod->h_root->d_inode;
-+ err = test_br(sb, hidden_dir, mod->perm, mod->path);
-+ if (unlikely(err))
-+ goto out;
-+
-+ br = stobr(sb, bindex);
-+ if (unlikely(br->br_perm == mod->perm))
-+ return 0; /* success */
-+
-+ if (br_writable(br->br_perm)) {
-+#if 1
-+ /* remove whiteout base */
-+ //todo: mod->perm?
-+ err = init_br_wh(sb, bindex, br, AuBr_RO, mod->h_root,
-+ br->br_mnt);
-+ if (unlikely(err))
-+ goto out;
-+#else
-+ dput(br->br_wh);
-+ dput(br->br_plink);
-+ br->br_wh = br->br_plink = NULL;
-+#endif
-+
-+ if (!br_writable(mod->perm)) {
-+ /* rw --> ro, file might be mmapped */
-+ struct file *file, *hf;
-+
-+#if 1 // test here
-+ DiMustNoWaiters(root);
-+ IiMustNoWaiters(root->d_inode);
-+ di_write_unlock(root);
-+
-+ // no need file_list_lock() since sbinfo is locked
-+ //file_list_lock();
-+ list_for_each_entry(file, &sb->s_files, f_u.fu_list) {
-+ LKTRTrace("%.*s\n", DLNPair(file->f_dentry));
-+ fi_read_lock(file);
-+ if (!S_ISREG(file->f_dentry->d_inode->i_mode)
-+ || !(file->f_mode & FMODE_WRITE)
-+ || fbstart(file) != bindex) {
-+ FiMustNoWaiters(file);
-+ fi_read_unlock(file);
-+ continue;
-+ }
-+
-+ // todo: already flushed?
-+ hf = au_h_fptr(file);
-+ hf->f_flags = au_file_roflags(hf->f_flags);
-+ hf->f_mode &= ~FMODE_WRITE;
-+ FiMustNoWaiters(file);
-+ fi_read_unlock(file);
-+ }
-+ //file_list_unlock();
-+
-+ /* aufs_write_lock() calls ..._child() */
-+ di_write_lock_child(root);
-+#endif
-+ }
-+ }
-+
-+ *do_update |= need_sigen_inc(br->br_perm, mod->perm);
-+ br->br_perm = mod->perm;
-+ return err; /* success */
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-diff --git a/fs/aufs/branch.h b/fs/aufs/branch.h
-new file mode 100755
-index 0000000..2557836
---- /dev/null
-+++ b/fs/aufs/branch.h
-@@ -0,0 +1,235 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: branch.h,v 1.30 2007/05/14 03:41:51 sfjro Exp $ */
-+
-+#ifndef __AUFS_BRANCH_H__
-+#define __AUFS_BRANCH_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/mount.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+#include "super.h"
-+
-+/* protected by superblock rwsem */
-+struct aufs_branch {
-+ struct file *br_xino;
-+ readf_t br_xino_read;
-+ writef_t br_xino_write;
-+
-+ aufs_bindex_t br_id;
-+
-+ int br_perm;
-+ struct vfsmount *br_mnt;
-+ atomic_t br_count;
-+
-+ /* whiteout base */
-+ struct aufs_rwsem br_wh_rwsem;
-+ struct dentry *br_wh;
-+ atomic_t br_wh_running;
-+
-+ /* pseudo-link dir */
-+ struct dentry *br_plink;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* branch permission and attribute */
-+enum {
-+ AuBr_RW, /* writable, linkable wh */
-+ AuBr_RO, /* readonly, no wh */
-+ AuBr_RR, /* natively readonly, no wh */
-+
-+ AuBr_RWNoLinkWH, /* un-linkable whiteouts */
-+
-+ AuBr_ROWH,
-+ AuBr_RRWH, /* whiteout-able */
-+
-+ AuBr_Last
-+};
-+
-+static inline int br_writable(int brperm)
-+{
-+ return (brperm == AuBr_RW
-+ || brperm == AuBr_RWNoLinkWH);
-+}
-+
-+static inline int br_whable(int brperm)
-+{
-+ return (brperm == AuBr_RW
-+ || brperm == AuBr_ROWH
-+ || brperm == AuBr_RRWH);
-+}
-+
-+static inline int br_linkable_wh(int brperm)
-+{
-+ return (brperm == AuBr_RW);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define _AuNoNfsBranchMsg "NFS branch is not supported"
-+#if LINUX_VERSION_CODE == KERNEL_VERSION(2,6,15)
-+#define AuNoNfsBranch
-+#define AuNoNfsBranchMsg _AuNoNfsBranchMsg
-+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19) \
-+ && !defined(CONFIG_AUFS_LHASH_PATCH)
-+#define AuNoNfsBranch
-+#define AuNoNfsBranchMsg _AuNoNfsBranchMsg \
-+ ", try lhash.patch and CONFIG_AUFS_LHASH_PATCH"
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_sbinfo;
-+void free_branches(struct aufs_sbinfo *sinfo);
-+int br_rdonly(struct aufs_branch *br);
-+int find_brindex(struct super_block *sb, aufs_bindex_t br_id);
-+int find_rw_br(struct super_block *sb, aufs_bindex_t bend);
-+int find_rw_parent_br(struct dentry *dentry, aufs_bindex_t bend);
-+struct opt_add;
-+int br_add(struct super_block *sb, struct opt_add *add, int remount);
-+struct opt_del;
-+int br_del(struct super_block *sb, struct opt_del *del, int remount);
-+struct opt_mod;
-+int br_mod(struct super_block *sb, struct opt_mod *mod, int remount,
-+ int *do_update);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline int br_count(struct aufs_branch *br)
-+{
-+ return atomic_read(&br->br_count);
-+}
-+
-+static inline void br_get(struct aufs_branch *br)
-+{
-+ atomic_inc(&br->br_count);
-+}
-+
-+static inline void br_put(struct aufs_branch *br)
-+{
-+ atomic_dec(&br->br_count);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* Superblock to branch */
-+static inline aufs_bindex_t sbr_id(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return stobr(sb, bindex)->br_id;
-+}
-+
-+static inline
-+struct vfsmount *sbr_mnt(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return stobr(sb, bindex)->br_mnt;
-+}
-+
-+static inline
-+struct super_block *sbr_sb(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return sbr_mnt(sb, bindex)->mnt_sb;
-+}
-+
-+#if 0
-+static inline int sbr_count(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return br_count(stobr(sb, bindex));
-+}
-+
-+static inline void sbr_get(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ br_get(stobr(sb, bindex));
-+}
-+#endif
-+
-+static inline void sbr_put(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ br_put(stobr(sb, bindex));
-+}
-+
-+static inline int sbr_perm(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return stobr(sb, bindex)->br_perm;
-+}
-+
-+static inline int sbr_is_whable(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return br_whable(sbr_perm(sb, bindex));
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_LHASH_PATCH
-+static inline struct vfsmount *au_do_nfsmnt(struct vfsmount *h_mnt)
-+{
-+ if (!au_is_nfs(h_mnt->mnt_sb))
-+ return NULL;
-+ return h_mnt;
-+}
-+
-+/* it doesn't mntget() */
-+static inline
-+struct vfsmount *au_nfsmnt(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return au_do_nfsmnt(sbr_mnt(sb, bindex));
-+}
-+#else
-+static inline struct vfsmount *au_do_nfsmnt(struct vfsmount *h_mnt)
-+{
-+ return NULL;
-+}
-+
-+static inline
-+struct vfsmount *au_nfsmnt(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return NULL;
-+}
-+#endif /* CONFIG_AUFS_LHASH_PATCH */
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * br_wh_read_lock, br_wh_write_lock
-+ * br_wh_read_unlock, br_wh_write_unlock, br_wh_downgrade_lock
-+ */
-+SimpleRwsemFuncs(br_wh, struct aufs_branch *br, br->br_wh_rwsem);
-+
-+/* to debug easier, do not make them inlined functions */
-+#define BrWhMustReadLock(br) do { \
-+ /* SiMustAnyLock(sb); */ \
-+ RwMustReadLock(&(br)->br_wh_rwsem); \
-+} while (0)
-+
-+#define BrWhMustWriteLock(br) do { \
-+ /* SiMustAnyLock(sb); */ \
-+ RwMustWriteLock(&(br)->br_wh_rwsem); \
-+} while (0)
-+
-+#define BrWhMustAnyLock(br) do { \
-+ /* SiMustAnyLock(sb); */ \
-+ RwMustAnyLock(&(br)->br_wh_rwsem); \
-+} while (0)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_BRANCH_H__ */
-diff --git a/fs/aufs/cpup.c b/fs/aufs/cpup.c
-new file mode 100755
-index 0000000..6636f40
---- /dev/null
-+++ b/fs/aufs/cpup.c
-@@ -0,0 +1,773 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: cpup.c,v 1.37 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#include <asm/uaccess.h>
-+#include "aufs.h"
-+
-+/* violent cpup_attr_*() functions don't care inode lock */
-+void au_cpup_attr_timesizes(struct inode *inode)
-+{
-+ struct inode *hidden_inode;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ //IMustLock(inode);
-+ hidden_inode = au_h_iptr(inode);
-+ DEBUG_ON(!hidden_inode);
-+ //IMustLock(!hidden_inode);
-+
-+ inode->i_atime = hidden_inode->i_atime;
-+ inode->i_mtime = hidden_inode->i_mtime;
-+ inode->i_ctime = hidden_inode->i_ctime;
-+ spin_lock(&inode->i_lock);
-+ i_size_write(inode, i_size_read(hidden_inode));
-+ inode->i_blocks = hidden_inode->i_blocks;
-+ spin_unlock(&inode->i_lock);
-+}
-+
-+void au_cpup_attr_nlink(struct inode *inode)
-+{
-+ struct inode *h_inode;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ //IMustLock(inode);
-+ DEBUG_ON(!inode->i_mode);
-+
-+ h_inode = au_h_iptr(inode);
-+ inode->i_nlink = h_inode->i_nlink;
-+
-+ /*
-+ * fewer nlink makes find(1) noisy, but larger nlink doesn't.
-+ * it may includes whplink directory.
-+ */
-+ if (unlikely(S_ISDIR(h_inode->i_mode))) {
-+ aufs_bindex_t bindex, bend;
-+ bend = ibend(inode);
-+ for (bindex = ibstart(inode) + 1; bindex <= bend; bindex++) {
-+ h_inode = au_h_iptr_i(inode, bindex);
-+ if (h_inode)
-+ au_add_nlink(inode, h_inode);
-+ }
-+ }
-+}
-+
-+void au_cpup_attr_changable(struct inode *inode)
-+{
-+ struct inode *hidden_inode;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ //IMustLock(inode);
-+ hidden_inode = au_h_iptr(inode);
-+ DEBUG_ON(!hidden_inode);
-+
-+ inode->i_mode = hidden_inode->i_mode;
-+ inode->i_uid = hidden_inode->i_uid;
-+ inode->i_gid = hidden_inode->i_gid;
-+ au_cpup_attr_timesizes(inode);
-+
-+ //??
-+ inode->i_flags = hidden_inode->i_flags;
-+}
-+
-+void au_cpup_igen(struct inode *inode, struct inode *h_inode)
-+{
-+ inode->i_generation = h_inode->i_generation;
-+ itoii(inode)->ii_hsb1 = h_inode->i_sb;
-+}
-+
-+void au_cpup_attr_all(struct inode *inode)
-+{
-+ struct inode *hidden_inode;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ //IMustLock(inode);
-+ hidden_inode = au_h_iptr(inode);
-+ DEBUG_ON(!hidden_inode);
-+
-+ au_cpup_attr_changable(inode);
-+ if (inode->i_nlink > 0)
-+ au_cpup_attr_nlink(inode);
-+
-+ switch (inode->i_mode & S_IFMT) {
-+ case S_IFBLK:
-+ case S_IFCHR:
-+ inode->i_rdev = hidden_inode->i_rdev;
-+ }
-+ inode->i_blkbits = hidden_inode->i_blkbits;
-+ au_cpup_attr_blksize(inode, hidden_inode);
-+ au_cpup_igen(inode, hidden_inode);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* Note: dt_dentry and dt_hidden_dentry are not dget/dput-ed */
-+
-+/* keep the timestamps of the parent dir when cpup */
-+void dtime_store(struct dtime *dt, struct dentry *dentry,
-+ struct dentry *hidden_dentry)
-+{
-+ struct inode *inode;
-+
-+ TraceEnter();
-+ DEBUG_ON(!dentry || !hidden_dentry || !hidden_dentry->d_inode);
-+
-+ dt->dt_dentry = dentry;
-+ dt->dt_h_dentry = hidden_dentry;
-+ inode = hidden_dentry->d_inode;
-+ dt->dt_atime = inode->i_atime;
-+ dt->dt_mtime = inode->i_mtime;
-+ //smp_mb();
-+}
-+
-+// todo: remove extra parameter
-+void dtime_revert(struct dtime *dt, int h_parent_is_locked)
-+{
-+ struct iattr attr;
-+ int err;
-+ struct dentry *dentry;
-+
-+ LKTRTrace("h_parent locked %d\n", h_parent_is_locked);
-+
-+ attr.ia_atime = dt->dt_atime;
-+ attr.ia_mtime = dt->dt_mtime;
-+ attr.ia_valid = ATTR_FORCE | ATTR_MTIME | ATTR_MTIME_SET
-+ | ATTR_ATIME | ATTR_ATIME_SET;
-+ //smp_mb();
-+ dentry = NULL;
-+ if (!h_parent_is_locked /* && !IS_ROOT(dt->dt_dentry) */)
-+ dentry = dt->dt_dentry;
-+ err = vfsub_notify_change(dt->dt_h_dentry, &attr,
-+ need_dlgt(dt->dt_dentry->d_sb));
-+ if (unlikely(err))
-+ Warn("restoring timestamps failed(%d). ignored\n", err);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int cpup_iattr(struct dentry *hidden_dst, struct dentry *hidden_src,
-+ int dlgt)
-+{
-+ int err;
-+ struct iattr ia;
-+ struct inode *hidden_isrc, *hidden_idst;
-+
-+ LKTRTrace("%.*s\n", DLNPair(hidden_dst));
-+ hidden_idst = hidden_dst->d_inode;
-+ //IMustLock(hidden_idst);
-+ hidden_isrc = hidden_src->d_inode;
-+ //IMustLock(hidden_isrc);
-+
-+ ia.ia_valid = ATTR_FORCE | ATTR_MODE | ATTR_UID | ATTR_GID
-+ | ATTR_ATIME | ATTR_MTIME
-+ | ATTR_ATIME_SET | ATTR_MTIME_SET;
-+ ia.ia_mode = hidden_isrc->i_mode;
-+ ia.ia_uid = hidden_isrc->i_uid;
-+ ia.ia_gid = hidden_isrc->i_gid;
-+ ia.ia_atime = hidden_isrc->i_atime;
-+ ia.ia_mtime = hidden_isrc->i_mtime;
-+ err = vfsub_notify_change(hidden_dst, &ia, dlgt);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ hidden_idst->i_flags = hidden_isrc->i_flags; //??
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * to support a sparse file which is opened with O_APPEND,
-+ * we need to close the file.
-+ */
-+static int cpup_regular(struct dentry *dentry, aufs_bindex_t bdst,
-+ aufs_bindex_t bsrc, loff_t len)
-+{
-+ int err, i, sparse;
-+ struct super_block *sb;
-+ struct inode *hidden_inode;
-+ enum {SRC, DST};
-+ struct {
-+ aufs_bindex_t bindex;
-+ unsigned int flags;
-+ struct dentry *dentry;
-+ struct file *file;
-+ void *label, *label_file;
-+ } *h, hidden[] = {
-+ {
-+ .bindex = bsrc,
-+ .flags = O_RDONLY | O_NOATIME | O_LARGEFILE,
-+ .file = NULL,
-+ .label = &&out,
-+ .label_file = &&out_src_file
-+ },
-+ {
-+ .bindex = bdst,
-+ .flags = O_WRONLY | O_NOATIME | O_LARGEFILE,
-+ .file = NULL,
-+ .label = &&out_src_file,
-+ .label_file = &&out_dst_file
-+ }
-+ };
-+
-+ LKTRTrace("dentry %.*s, bdst %d, bsrc %d, len %lld\n",
-+ DLNPair(dentry), bdst, bsrc, len);
-+ DEBUG_ON(bsrc <= bdst);
-+ DEBUG_ON(!len);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(test_ro(sb, bdst, dentry->d_inode));
-+ // bsrc branch can be ro/rw.
-+
-+ h = hidden;
-+ for (i = 0; i < 2; i++, h++) {
-+ h->dentry = au_h_dptr_i(dentry, h->bindex);
-+ DEBUG_ON(!h->dentry);
-+ hidden_inode = h->dentry->d_inode;
-+ DEBUG_ON(!hidden_inode || !S_ISREG(hidden_inode->i_mode));
-+ h->file = hidden_open(dentry, h->bindex, h->flags);
-+ //if (LktrCond)
-+ //{fput(h->file); sbr_put(sb, h->bindex); h->file = ERR_PTR(-1);}
-+ err = PTR_ERR(h->file);
-+ if (IS_ERR(h->file))
-+ goto *h->label;
-+ err = -EINVAL;
-+ if (unlikely(!h->file->f_op))
-+ goto *h->label_file;
-+ }
-+
-+ /* stop updating while we copyup */
-+ IMustLock(hidden[SRC].dentry->d_inode);
-+ sparse = 0;
-+ err = au_copy_file(hidden[DST].file, hidden[SRC].file, len, sb,
-+ &sparse);
-+
-+ /* sparse file: update i_blocks next time */
-+ if (unlikely(!err && sparse))
-+ d_drop(dentry);
-+
-+ out_dst_file:
-+ fput(hidden[DST].file);
-+ sbr_put(sb, hidden[DST].bindex);
-+ out_src_file:
-+ fput(hidden[SRC].file);
-+ sbr_put(sb, hidden[SRC].bindex);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+// unnecessary?
-+unsigned int au_flags_cpup(unsigned int init, struct dentry *parent)
-+{
-+ if (unlikely(parent && IS_ROOT(parent)))
-+ init |= CPUP_LOCKED_GHDIR;
-+ return init;
-+}
-+
-+/* return with hidden dst inode is locked */
-+static int cpup_entry(struct dentry *dentry, aufs_bindex_t bdst,
-+ aufs_bindex_t bsrc, loff_t len, unsigned int flags,
-+ int dlgt)
-+{
-+ int err, isdir, symlen;
-+ struct dentry *hidden_src, *hidden_dst, *hidden_parent, *parent;
-+ struct inode *hidden_inode, *hidden_dir, *dir;
-+ struct dtime dt;
-+ umode_t mode;
-+ char *sym;
-+ mm_segment_t old_fs;
-+ const int do_dt = flags & CPUP_DTIME;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, i%lu, bdst %d, bsrc %d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), dentry->d_inode->i_ino, bdst, bsrc, len,
-+ flags);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(bdst >= bsrc || test_ro(sb, bdst, NULL));
-+ // bsrc branch can be ro/rw.
-+
-+ hidden_src = au_h_dptr_i(dentry, bsrc);
-+ DEBUG_ON(!hidden_src);
-+ hidden_inode = hidden_src->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+
-+ /* stop refrencing while we are creating */
-+ //parent = dget_parent(dentry);
-+ parent = dentry->d_parent;
-+ dir = parent->d_inode;
-+ hidden_dst = au_h_dptr_i(dentry, bdst);
-+ DEBUG_ON(hidden_dst && hidden_dst->d_inode);
-+ //hidden_parent = dget_parent(hidden_dst);
-+ hidden_parent = hidden_dst->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ if (do_dt)
-+ dtime_store(&dt, parent, hidden_parent);
-+
-+ isdir = 0;
-+ mode = hidden_inode->i_mode;
-+ switch (mode & S_IFMT) {
-+ case S_IFREG:
-+ /* stop updating while we are referencing */
-+ IMustLock(hidden_inode);
-+ err = vfsub_create(hidden_dir, hidden_dst, mode | S_IWUSR, NULL,
-+ dlgt);
-+ //if (LktrCond) {vfs_unlink(hidden_dir, hidden_dst); err = -1;}
-+ if (!err) {
-+ loff_t l = i_size_read(hidden_inode);
-+ if (len == -1 || l < len)
-+ len = l;
-+ if (len) {
-+ err = cpup_regular(dentry, bdst, bsrc, len);
-+ //if (LktrCond) err = -1;
-+ }
-+ if (unlikely(err)) {
-+ int rerr;
-+ rerr = vfsub_unlink(hidden_dir, hidden_dst,
-+ dlgt);
-+ if (rerr) {
-+ IOErr("failed unlinking cpup-ed %.*s"
-+ "(%d, %d)\n",
-+ DLNPair(hidden_dst), err, rerr);
-+ err = -EIO;
-+ }
-+ }
-+ }
-+ break;
-+ case S_IFDIR:
-+ isdir = 1;
-+ err = vfsub_mkdir(hidden_dir, hidden_dst, mode, dlgt);
-+ //if (LktrCond) {vfs_rmdir(hidden_dir, hidden_dst); err = -1;}
-+ if (!err) {
-+ /* setattr case: dir is not locked */
-+ if (0 && ibstart(dir) == bdst)
-+ au_cpup_attr_nlink(dir);
-+ au_cpup_attr_nlink(dentry->d_inode);
-+ }
-+ break;
-+ case S_IFLNK:
-+ err = -ENOMEM;
-+ sym = __getname();
-+ //if (LktrCond) {__putname(sym); sym = NULL;}
-+ if (unlikely(!sym))
-+ break;
-+ old_fs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = symlen = hidden_inode->i_op->readlink
-+ (hidden_src, (char __user*)sym, PATH_MAX);
-+ //if (LktrCond) err = symlen = -1;
-+ set_fs(old_fs);
-+ if (symlen > 0) {
-+ sym[symlen] = 0;
-+ err = vfsub_symlink(hidden_dir, hidden_dst, sym, mode,
-+ dlgt);
-+ //if (LktrCond)
-+ //{vfs_unlink(hidden_dir, hidden_dst); err = -1;}
-+ }
-+ __putname(sym);
-+ break;
-+ case S_IFCHR:
-+ case S_IFBLK:
-+ DEBUG_ON(!capable(CAP_MKNOD));
-+ /*FALLTHROUGH*/
-+ case S_IFIFO:
-+ case S_IFSOCK:
-+ err = vfsub_mknod(hidden_dir, hidden_dst, mode,
-+ hidden_inode->i_rdev, dlgt);
-+ //if (LktrCond) {vfs_unlink(hidden_dir, hidden_dst); err = -1;}
-+ break;
-+ default:
-+ IOErr("Unknown inode type 0%o\n", mode);
-+ err = -EIO;
-+ }
-+
-+ if (do_dt)
-+ dtime_revert(&dt, flags & CPUP_LOCKED_GHDIR);
-+ //dput(parent);
-+ //dput(hidden_parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * copyup the @dentry from @bsrc to @bdst.
-+ * the caller must set the both of hidden dentries.
-+ * @len is for trucating when it is -1 copyup the entire file.
-+ */
-+int cpup_single(struct dentry *dentry, aufs_bindex_t bdst, aufs_bindex_t bsrc,
-+ loff_t len, unsigned int flags)
-+{
-+ int err, rerr, isdir, dlgt;
-+ struct dentry *hidden_src, *hidden_dst, *parent;//, *h_parent;
-+ struct inode *dst_inode, *hidden_dir, *inode, *src_inode;
-+ struct super_block *sb;
-+ aufs_bindex_t old_ibstart;
-+ struct dtime dt;
-+
-+ LKTRTrace("%.*s, i%lu, bdst %d, bsrc %d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), dentry->d_inode->i_ino, bdst, bsrc, len,
-+ flags);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(bsrc <= bdst);
-+ hidden_dst = au_h_dptr_i(dentry, bdst);
-+ DEBUG_ON(!hidden_dst || hidden_dst->d_inode);
-+ //h_parent = dget_parent(hidden_dst);
-+ //hidden_dir = h_parent->d_inode;
-+ hidden_dir = hidden_dst->d_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ hidden_src = au_h_dptr_i(dentry, bsrc);
-+ DEBUG_ON(!hidden_src || !hidden_src->d_inode);
-+ inode = dentry->d_inode;
-+ IiMustWriteLock(inode);
-+
-+ dlgt = need_dlgt(sb);
-+ dst_inode = au_h_iptr_i(inode, bdst);
-+ if (unlikely(dst_inode)) {
-+ if (unlikely(!au_flag_test(sb, AuFlag_PLINK))) {
-+ err = -EIO;
-+ IOErr("i%lu exists on a upper branch "
-+ "but plink is disabled\n", inode->i_ino);
-+ goto out;
-+ }
-+
-+ if (dst_inode->i_nlink) {
-+ hidden_src = lkup_plink(sb, bdst, inode);
-+ err = PTR_ERR(hidden_src);
-+ if (IS_ERR(hidden_src))
-+ goto out;
-+ DEBUG_ON(!hidden_src->d_inode);
-+ // vfs_link() does lock the inode
-+ err = vfsub_link(hidden_src, hidden_dir, hidden_dst, dlgt);
-+ dput(hidden_src);
-+ goto out;
-+ } else
-+ /* udba work */
-+ au_update_brange(inode, 1);
-+ }
-+
-+ old_ibstart = ibstart(inode);
-+ err = cpup_entry(dentry, bdst, bsrc, len, flags, dlgt);
-+ if (unlikely(err))
-+ goto out;
-+ dst_inode = hidden_dst->d_inode;
-+ hi_lock_child2(dst_inode);
-+
-+ //todo: test dlgt
-+ err = cpup_iattr(hidden_dst, hidden_src, dlgt);
-+ //if (LktrCond) err = -1;
-+#if 0 // xattr
-+ if (0 && !err)
-+ err = cpup_xattrs(hidden_src, hidden_dst);
-+#endif
-+ isdir = S_ISDIR(dst_inode->i_mode);
-+ if (!err) {
-+ if (bdst < old_ibstart)
-+ set_ibstart(inode, bdst);
-+ set_h_iptr(inode, bdst, igrab(dst_inode),
-+ au_hi_flags(inode, isdir));
-+ i_unlock(dst_inode);
-+ src_inode = hidden_src->d_inode;
-+ if (!isdir) {
-+ if (src_inode->i_nlink > 1
-+ && au_flag_test(sb, AuFlag_PLINK))
-+ append_plink(sb, inode, hidden_dst, bdst);
-+ else {
-+ /* braces are added to stop a warning */
-+ ;//xino_write0(sb, bsrc, src_inode->i_ino);
-+ /* ignore this error */
-+ }
-+ }
-+ //goto out; /* success */
-+ return 0; /* success */
-+ }
-+
-+ /* revert */
-+ i_unlock(dst_inode);
-+ parent = dget_parent(dentry);
-+ //dtime_store(&dt, parent, h_parent);
-+ dtime_store(&dt, parent, hidden_dst->d_parent);
-+ dput(parent);
-+ if (!isdir)
-+ rerr = vfsub_unlink(hidden_dir, hidden_dst, dlgt);
-+ else
-+ rerr = vfsub_rmdir(hidden_dir, hidden_dst, dlgt);
-+ //rerr = -1;
-+ dtime_revert(&dt, flags & CPUP_LOCKED_GHDIR);
-+ if (rerr) {
-+ IOErr("failed removing broken entry(%d, %d)\n", err, rerr);
-+ err = -EIO;
-+ }
-+
-+ out:
-+ //dput(h_parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct cpup_single_args {
-+ int *errp;
-+ struct dentry *dentry;
-+ aufs_bindex_t bdst, bsrc;
-+ loff_t len;
-+ unsigned int flags;
-+};
-+
-+static void call_cpup_single(void *args)
-+{
-+ struct cpup_single_args *a = args;
-+ *a->errp = cpup_single(a->dentry, a->bdst, a->bsrc, a->len, a->flags);
-+}
-+
-+int sio_cpup_single(struct dentry *dentry, aufs_bindex_t bdst,
-+ aufs_bindex_t bsrc, loff_t len, unsigned int flags)
-+{
-+ int err;
-+ struct dentry *hidden_dentry;
-+ umode_t mode;
-+
-+ LKTRTrace("%.*s, i%lu, bdst %d, bsrc %d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), dentry->d_inode->i_ino, bdst, bsrc, len,
-+ flags);
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bsrc);
-+ mode = hidden_dentry->d_inode->i_mode & S_IFMT;
-+ if ((mode != S_IFCHR && mode != S_IFBLK)
-+ || capable(CAP_MKNOD))
-+ err = cpup_single(dentry, bdst, bsrc, len, flags);
-+ else {
-+ struct cpup_single_args args = {
-+ .errp = &err,
-+ .dentry = dentry,
-+ .bdst = bdst,
-+ .bsrc = bsrc,
-+ .len = len,
-+ .flags = flags
-+ };
-+ au_wkq_wait(call_cpup_single, &args, /*dlgt*/0);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * copyup the @dentry from the first active hidden branch to @bdst,
-+ * using cpup_single().
-+ */
-+int cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
-+ unsigned int flags)
-+{
-+ int err;
-+ struct inode *inode;
-+ aufs_bindex_t bsrc, bend;
-+
-+ LKTRTrace("%.*s, bdst %d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), bdst, len, flags);
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!S_ISDIR(inode->i_mode) && dbstart(dentry) < bdst);
-+
-+ bend = dbend(dentry);
-+ for (bsrc = bdst + 1; bsrc <= bend; bsrc++)
-+ if (au_h_dptr_i(dentry, bsrc))
-+ break;
-+ DEBUG_ON(!au_h_dptr_i(dentry, bsrc));
-+
-+ err = lkup_neg(dentry, bdst);
-+ //err = -1;
-+ if (!err) {
-+ err = cpup_single(dentry, bdst, bsrc, len, flags);
-+ if (!err)
-+ return 0; /* success */
-+
-+ /* revert */
-+ set_h_dptr(dentry, bdst, NULL);
-+ set_dbstart(dentry, bsrc);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct cpup_simple_args {
-+ int *errp;
-+ struct dentry *dentry;
-+ aufs_bindex_t bdst;
-+ loff_t len;
-+ unsigned int flags;
-+};
-+
-+static void call_cpup_simple(void *args)
-+{
-+ struct cpup_simple_args *a = args;
-+ *a->errp = cpup_simple(a->dentry, a->bdst, a->len, a->flags);
-+}
-+
-+int sio_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
-+ unsigned int flags)
-+{
-+ int err, do_sio, dlgt;
-+ //struct dentry *parent;
-+ struct inode *hidden_dir, *dir;
-+
-+ LKTRTrace("%.*s, b%d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), bdst, len, flags);
-+
-+ //parent = dget_parent(dentry);
-+ //dir = parent->d_inode;
-+ dir = dentry->d_parent->d_inode;
-+ hidden_dir = au_h_iptr_i(dir, bdst);
-+ dlgt = need_dlgt(dir->i_sb);
-+ do_sio = au_test_perm(hidden_dir, MAY_EXEC | MAY_WRITE, dlgt);
-+ if (!do_sio) {
-+ umode_t mode = dentry->d_inode->i_mode & S_IFMT;
-+ do_sio = ((mode == S_IFCHR || mode == S_IFBLK)
-+ && !capable(CAP_MKNOD));
-+ }
-+ if (!do_sio)
-+ err = cpup_simple(dentry, bdst, len, flags);
-+ else {
-+ struct cpup_simple_args args = {
-+ .errp = &err,
-+ .dentry = dentry,
-+ .bdst = bdst,
-+ .len = len,
-+ .flags = flags
-+ };
-+ au_wkq_wait(call_cpup_simple, &args, /*dlgt*/0);
-+ }
-+
-+ //dput(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+//todo: dcsub
-+/* cf. revalidate function in file.c */
-+int cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst, struct dentry *locked)
-+{
-+ int err;
-+ struct super_block *sb;
-+ struct dentry *d, *parent, *hidden_parent;
-+ unsigned int udba;
-+
-+ LKTRTrace("%.*s, b%d, parent i%lu, locked %p\n",
-+ DLNPair(dentry), bdst, parent_ino(dentry), locked);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(test_ro(sb, bdst, NULL));
-+ parent = dentry->d_parent;
-+ IiMustWriteLock(parent->d_inode);
-+ if (unlikely(IS_ROOT(parent)))
-+ return 0;
-+ if (locked) {
-+ DiMustAnyLock(locked);
-+ IiMustAnyLock(locked->d_inode);
-+ }
-+
-+ /* slow loop, keep it simple and stupid */
-+ err = 0;
-+ udba = au_flag_test(sb, AuFlag_UDBA_INOTIFY);
-+ while (1) {
-+ parent = dentry->d_parent; // dget_parent()
-+ hidden_parent = au_h_dptr_i(parent, bdst);
-+ if (hidden_parent)
-+ return 0; /* success */
-+
-+ /* find top dir which is needed to cpup */
-+ do {
-+ d = parent;
-+ parent = d->d_parent; // dget_parent()
-+ if (parent != locked)
-+ di_read_lock_parent3(parent, !AUFS_I_RLOCK);
-+ hidden_parent = au_h_dptr_i(parent, bdst);
-+ if (parent != locked)
-+ di_read_unlock(parent, !AUFS_I_RLOCK);
-+ } while (!hidden_parent);
-+
-+ if (d != dentry->d_parent)
-+ di_write_lock_child3(d);
-+
-+ /* somebody else might create while we were sleeping */
-+ if (!au_h_dptr_i(d, bdst) || !au_h_dptr_i(d, bdst)->d_inode) {
-+ struct inode *h_dir = hidden_parent->d_inode,
-+ *dir = parent->d_inode,
-+ *h_gdir, *gdir;
-+
-+ if (au_h_dptr_i(d, bdst))
-+ au_update_dbstart(d);
-+ //DEBUG_ON(dbstart(d) <= bdst);
-+ if (parent != locked)
-+ di_read_lock_parent3(parent, AUFS_I_RLOCK);
-+ h_gdir = gdir = NULL;
-+ if (unlikely(udba && !IS_ROOT(parent))) {
-+ gdir = parent->d_parent->d_inode;
-+ h_gdir = hidden_parent->d_parent->d_inode;
-+ hgdir_lock(h_gdir, gdir, bdst);
-+ }
-+ hdir_lock(h_dir, dir, bdst);
-+ err = sio_cpup_simple(d, bdst, -1,
-+ au_flags_cpup(CPUP_DTIME,
-+ parent));
-+ //if (LktrCond) err = -1;
-+ hdir_unlock(h_dir, dir, bdst);
-+ if (unlikely(gdir))
-+ hdir_unlock(h_gdir, gdir, bdst);
-+ if (parent != locked)
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ }
-+
-+ if (d != dentry->d_parent)
-+ di_write_unlock(d);
-+ if (unlikely(err))
-+ break;
-+ }
-+
-+// out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst,
-+ struct dentry *locked)
-+{
-+ int err;
-+ struct dentry *parent;
-+ struct inode *dir;
-+
-+ parent = dentry->d_parent;
-+ dir = parent->d_inode;
-+ LKTRTrace("%.*s, b%d, parent i%lu, locked %p\n",
-+ DLNPair(dentry), bdst, dir->i_ino, locked);
-+ DiMustReadLock(parent);
-+ IiMustReadLock(dir);
-+
-+ if (au_h_iptr_i(dir, bdst))
-+ return 0;
-+
-+ err = 0;
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ di_write_lock_parent(parent);
-+ if (au_h_iptr_i(dir, bdst))
-+ goto out;
-+
-+ err = cpup_dirs(dentry, bdst, locked);
-+
-+ out:
-+ di_downgrade_lock(parent, AUFS_I_RLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-diff --git a/fs/aufs/cpup.h b/fs/aufs/cpup.h
-new file mode 100755
-index 0000000..86557aa
---- /dev/null
-+++ b/fs/aufs/cpup.h
-@@ -0,0 +1,72 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: cpup.h,v 1.15 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_CPUP_H__
-+#define __AUFS_CPUP_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+
-+static inline
-+void au_cpup_attr_blksize(struct inode *inode, struct inode *h_inode)
-+{
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
-+ inode->i_blksize = h_inode->i_blksize;
-+#endif
-+}
-+
-+void au_cpup_attr_timesizes(struct inode *inode);
-+void au_cpup_attr_nlink(struct inode *inode);
-+void au_cpup_attr_changable(struct inode *inode);
-+void au_cpup_igen(struct inode *inode, struct inode *h_inode);
-+void au_cpup_attr_all(struct inode *inode);
-+
-+#define CPUP_DTIME 1 // do dtime_store/revert
-+// todo: remove this
-+#define CPUP_LOCKED_GHDIR 2 // grand parent hidden dir is locked
-+unsigned int au_flags_cpup(unsigned int init, struct dentry *parent);
-+
-+int cpup_single(struct dentry *dentry, aufs_bindex_t bdst, aufs_bindex_t bsrc,
-+ loff_t len, unsigned int flags);
-+int sio_cpup_single(struct dentry *dentry, aufs_bindex_t bdst,
-+ aufs_bindex_t bsrc, loff_t len, unsigned int flags);
-+int cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
-+ unsigned int flags);
-+int sio_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
-+ unsigned int flags);
-+
-+int cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst, struct dentry *locked);
-+int test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst,
-+ struct dentry *locked);
-+
-+/* keep timestamps when copyup */
-+struct dtime {
-+ struct dentry *dt_dentry, *dt_h_dentry;
-+ struct timespec dt_atime, dt_mtime;
-+};
-+void dtime_store(struct dtime *dt, struct dentry *dentry,
-+ struct dentry *h_dentry);
-+void dtime_revert(struct dtime *dt, int h_parent_is_locked);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_CPUP_H__ */
-diff --git a/fs/aufs/dcsub.c b/fs/aufs/dcsub.c
-new file mode 100755
-index 0000000..6ec29d3
---- /dev/null
-+++ b/fs/aufs/dcsub.c
-@@ -0,0 +1,175 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dcsub.c,v 1.3 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+static void au_dpage_free(struct au_dpage *dpage)
-+{
-+ int i;
-+
-+ TraceEnter();
-+ DEBUG_ON(!dpage);
-+
-+ for (i = 0; i < dpage->ndentry; i++)
-+ dput(dpage->dentries[i]);
-+ free_page((unsigned long)dpage->dentries);
-+}
-+
-+int au_dpages_init(struct au_dcsub_pages *dpages, gfp_t gfp)
-+{
-+ int err;
-+ void *p;
-+
-+ TraceEnter();
-+
-+ err = -ENOMEM;
-+ dpages->dpages = kmalloc(sizeof(*dpages->dpages), gfp);
-+ if (unlikely(!dpages->dpages))
-+ goto out;
-+ p = (void*)__get_free_page(gfp);
-+ if (unlikely(!p))
-+ goto out_dpages;
-+ dpages->dpages[0].ndentry = 0;
-+ dpages->dpages[0].dentries = p;
-+ dpages->ndpage = 1;
-+ return 0; /* success */
-+
-+ out_dpages:
-+ kfree(dpages->dpages);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+void au_dpages_free(struct au_dcsub_pages *dpages)
-+{
-+ int i;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < dpages->ndpage; i++)
-+ au_dpage_free(dpages->dpages + i);
-+ kfree(dpages->dpages);
-+}
-+
-+static int au_dpages_append(struct au_dcsub_pages *dpages,
-+ struct dentry *dentry, gfp_t gfp)
-+{
-+ int err, sz;
-+ struct au_dpage *dpage;
-+ void *p;
-+
-+ //TraceEnter();
-+
-+ dpage = dpages->dpages + dpages->ndpage - 1;
-+ DEBUG_ON(!dpage);
-+ sz = PAGE_SIZE/sizeof(dentry);
-+ if (unlikely(dpage->ndentry >= sz)) {
-+ LKTRLabel(new dpage);
-+ err = -ENOMEM;
-+ sz = dpages->ndpage * sizeof(*dpages->dpages);
-+ p = au_kzrealloc(dpages->dpages, sz,
-+ sz + sizeof(*dpages->dpages), gfp);
-+ if (unlikely(!p))
-+ goto out;
-+ dpage = dpages->dpages + dpages->ndpage;
-+ p = (void*)__get_free_page(gfp);
-+ if (unlikely(!p))
-+ goto out;
-+ dpage->ndentry = 0;
-+ dpage->dentries = p;
-+ dpages->ndpage++;
-+ }
-+
-+ dpage->dentries[dpage->ndentry++] = dget(dentry);
-+ return 0; /* success */
-+
-+ out:
-+ //TraceErr(err);
-+ return err;
-+}
-+
-+int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root,
-+ au_dpages_test test, void *arg)
-+{
-+ int err;
-+ struct dentry *this_parent = root;
-+ struct list_head *next;
-+ struct super_block *sb = root->d_sb;
-+
-+ TraceEnter();
-+
-+ err = 0;
-+ spin_lock(&dcache_lock);
-+ repeat:
-+ next = this_parent->d_subdirs.next;
-+ resume:
-+ if (this_parent->d_sb == sb
-+ && !IS_ROOT(this_parent)
-+ && atomic_read(&this_parent->d_count)
-+ && this_parent->d_inode
-+ && (!test || test(this_parent, arg))) {
-+ err = au_dpages_append(dpages, this_parent, GFP_ATOMIC);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+
-+ while (next != &this_parent->d_subdirs) {
-+ struct list_head *tmp = next;
-+ struct dentry *dentry = list_entry(tmp, struct dentry, D_CHILD);
-+ next = tmp->next;
-+ if (unlikely(/*d_unhashed(dentry) || */!dentry->d_inode))
-+ continue;
-+ if (!list_empty(&dentry->d_subdirs)) {
-+ this_parent = dentry;
-+ goto repeat;
-+ }
-+ if (dentry->d_sb == sb
-+ && atomic_read(&dentry->d_count)
-+ && (!test || test(dentry, arg))) {
-+ err = au_dpages_append(dpages, dentry, GFP_ATOMIC);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+ }
-+
-+ if (this_parent != root) {
-+ next = this_parent->D_CHILD.next;
-+ this_parent = this_parent->d_parent;
-+ goto resume;
-+ }
-+ out:
-+ spin_unlock(&dcache_lock);
-+#if 0
-+ if (!err) {
-+ int i, j;
-+ j = 0;
-+ for (i = 0; i < dpages->ndpage; i++) {
-+ if ((dpages->dpages + i)->ndentry)
-+ Dbg("%d: %d\n", i, (dpages->dpages + i)->ndentry);
-+ j += (dpages->dpages + i)->ndentry;
-+ }
-+ if (j)
-+ Dbg("ndpage %d, %d\n", dpages->ndpage, j);
-+ }
-+#endif
-+ TraceErr(err);
-+ return err;
-+}
-diff --git a/fs/aufs/dcsub.h b/fs/aufs/dcsub.h
-new file mode 100755
-index 0000000..0ba034b
---- /dev/null
-+++ b/fs/aufs/dcsub.h
-@@ -0,0 +1,47 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dcsub.h,v 1.2 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_DCSUB_H__
-+#define __AUFS_DCSUB_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/dcache.h>
-+
-+struct au_dpage {
-+ int ndentry;
-+ struct dentry **dentries;
-+};
-+
-+struct au_dcsub_pages {
-+ int ndpage;
-+ struct au_dpage *dpages;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int au_dpages_init(struct au_dcsub_pages *dpages, gfp_t gfp);
-+void au_dpages_free(struct au_dcsub_pages *dpages);
-+typedef int (*au_dpages_test)(struct dentry *dentry, void *arg);
-+int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root,
-+ au_dpages_test test, void *arg);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_DCSUB_H__ */
-diff --git a/fs/aufs/debug.c b/fs/aufs/debug.c
-new file mode 100755
-index 0000000..99d158b
---- /dev/null
-+++ b/fs/aufs/debug.c
-@@ -0,0 +1,262 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: debug.c,v 1.27 2007/04/30 05:48:23 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+atomic_t aufs_cond = ATOMIC_INIT(0);
-+
-+#if defined(CONFIG_LKTR) || defined(CONFIG_LKTR_MODULE)
-+#define dpri(fmt, arg...) \
-+ do {if (LktrCond) printk(KERN_DEBUG fmt, ##arg);} while (0)
-+#else
-+#define dpri(fmt, arg...) printk(KERN_DEBUG fmt, ##arg)
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void au_dpri_whlist(struct aufs_nhash *whlist)
-+{
-+ int i;
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos;
-+
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ head = whlist->heads + i;
-+ hlist_for_each_entry(tpos, pos, head, wh_hash)
-+ dpri("b%d, %.*s, %d\n",
-+ tpos->wh_bindex,
-+ tpos->wh_str.len, tpos->wh_str.name,
-+ tpos->wh_str.len);
-+ }
-+}
-+
-+void au_dpri_vdir(struct aufs_vdir *vdir)
-+{
-+ int i;
-+ union aufs_deblk_p p;
-+ unsigned char *o;
-+
-+ if (!vdir || IS_ERR(vdir)) {
-+ dpri("err %ld\n", PTR_ERR(vdir));
-+ return;
-+ }
-+
-+ dpri("nblk %d, deblk %p %d, last{%d, %p}, ver %lu\n",
-+ vdir->vd_nblk, vdir->vd_deblk, ksize(vdir->vd_deblk),
-+ vdir->vd_last.i, vdir->vd_last.p.p, vdir->vd_version);
-+ for (i = 0; i < vdir->vd_nblk; i++) {
-+ p.deblk = vdir->vd_deblk[i];
-+ o = p.p;
-+ dpri("[%d]: %p %d\n", i, o, ksize(o));
-+#if 0 // verbose
-+ int j;
-+ for (j = 0; j < 8; j++) {
-+ dpri("%p(+%d) {%02x %02x %02x %02x %02x %02x %02x %02x "
-+ "%02x %02x %02x %02x %02x %02x %02x %02x}\n",
-+ p.p, p.p - o,
-+ p.p[0], p.p[1], p.p[2], p.p[3],
-+ p.p[4], p.p[5], p.p[6], p.p[7],
-+ p.p[8], p.p[9], p.p[10], p.p[11],
-+ p.p[12], p.p[13], p.p[14], p.p[15]);
-+ p.p += 16;
-+ }
-+#endif
-+ }
-+}
-+
-+static int do_pri_inode(aufs_bindex_t bindex, struct inode *inode)
-+{
-+ if (!inode || IS_ERR(inode)) {
-+ dpri("i%d: err %ld\n", bindex, PTR_ERR(inode));
-+ return -1;
-+ }
-+
-+ /* the type of i_blocks depends upon CONFIG_LSF */
-+ BUILD_BUG_ON(sizeof(inode->i_blocks) != sizeof(unsigned long)
-+ && sizeof(inode->i_blocks) != sizeof(u64));
-+ dpri("i%d: i%lu, %s, cnt %d, nl %u, 0%o, sz %Lu, blk %Lu,"
-+ " ct %Ld, np %lu, st 0x%lx, g %x\n",
-+ bindex,
-+ inode->i_ino, inode->i_sb ? au_sbtype(inode->i_sb) : "??",
-+ atomic_read(&inode->i_count), inode->i_nlink, inode->i_mode,
-+ i_size_read(inode), (u64)inode->i_blocks,
-+ timespec_to_ns(&inode->i_ctime) & 0x0ffff,
-+ inode->i_mapping ? inode->i_mapping->nrpages : 0,
-+ inode->i_state, inode->i_generation);
-+ return 0;
-+}
-+
-+void au_dpri_inode(struct inode *inode)
-+{
-+ struct aufs_iinfo *iinfo;
-+ aufs_bindex_t bindex;
-+ int err;
-+
-+ err = do_pri_inode(-1, inode);
-+ if (err || !au_is_aufs(inode->i_sb))
-+ return;
-+
-+ iinfo = itoii(inode);
-+ if (!iinfo)
-+ return;
-+ dpri("i-1: bstart %d, bend %d, gen %d\n",
-+ iinfo->ii_bstart, iinfo->ii_bend, au_iigen(inode));
-+ if (iinfo->ii_bstart < 0)
-+ return;
-+ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend; bindex++)
-+ do_pri_inode(bindex, iinfo->ii_hinode[0 + bindex].hi_inode);
-+}
-+
-+static int do_pri_dentry(aufs_bindex_t bindex, struct dentry *dentry)
-+{
-+ if (!dentry || IS_ERR(dentry)) {
-+ dpri("d%d: err %ld\n", bindex, PTR_ERR(dentry));
-+ return -1;
-+ }
-+ dpri("d%d: %.*s/%.*s, %s, cnt %d, flags 0x%x\n",
-+ bindex,
-+ DLNPair(dentry->d_parent), DLNPair(dentry),
-+ dentry->d_sb ? au_sbtype(dentry->d_sb) : "??",
-+ atomic_read(&dentry->d_count), dentry->d_flags);
-+ do_pri_inode(bindex, dentry->d_inode);
-+ return 0;
-+}
-+
-+void au_dpri_dentry(struct dentry *dentry)
-+{
-+ struct aufs_dinfo *dinfo;
-+ aufs_bindex_t bindex;
-+ int err;
-+
-+ err = do_pri_dentry(-1, dentry);
-+ if (err || !au_is_aufs(dentry->d_sb))
-+ return;
-+
-+ dinfo = dtodi(dentry);
-+ if (!dinfo)
-+ return;
-+ dpri("d-1: bstart %d, bend %d, bwh %d, bdiropq %d, gen %d\n",
-+ dinfo->di_bstart, dinfo->di_bend,
-+ dinfo->di_bwh, dinfo->di_bdiropq, au_digen(dentry));
-+ if (dinfo->di_bstart < 0)
-+ return;
-+ for (bindex = dinfo->di_bstart; bindex <= dinfo->di_bend; bindex++)
-+ do_pri_dentry(bindex, dinfo->di_hdentry[0 + bindex].hd_dentry);
-+}
-+
-+static int do_pri_file(aufs_bindex_t bindex, struct file *file)
-+{
-+ char a[32];
-+
-+ if (!file || IS_ERR(file)) {
-+ dpri("f%d: err %ld\n", bindex, PTR_ERR(file));
-+ return -1;
-+ }
-+ a[0] = 0;
-+ if (bindex == -1 && ftofi(file))
-+ snprintf(a, sizeof(a), ", mmapped %d", au_is_mmapped(file));
-+ dpri("f%d: mode 0x%x, flags 0%o, cnt %d, pos %Lu%s\n",
-+ bindex, file->f_mode, file->f_flags, file_count(file),
-+ file->f_pos, a);
-+ do_pri_dentry(bindex, file->f_dentry);
-+ return 0;
-+}
-+
-+void au_dpri_file(struct file *file)
-+{
-+ struct aufs_finfo *finfo;
-+ aufs_bindex_t bindex;
-+ int err;
-+
-+ err = do_pri_file(-1, file);
-+ if (err || !file->f_dentry || !au_is_aufs(file->f_dentry->d_sb))
-+ return;
-+
-+ finfo = ftofi(file);
-+ if (!finfo)
-+ return;
-+ if (finfo->fi_bstart < 0)
-+ return;
-+ for (bindex = finfo->fi_bstart; bindex <= finfo->fi_bend; bindex++) {
-+ struct aufs_hfile *hf;
-+ //dpri("bindex %d\n", bindex);
-+ hf = finfo->fi_hfile + bindex;
-+ do_pri_file(bindex, hf ? hf->hf_file : NULL);
-+ }
-+}
-+
-+static int do_pri_br(aufs_bindex_t bindex, struct aufs_branch *br)
-+{
-+ struct vfsmount *mnt;
-+ struct super_block *sb;
-+
-+ if (!br || IS_ERR(br)
-+ || !(mnt = br->br_mnt) || IS_ERR(mnt)
-+ || !(sb = mnt->mnt_sb) || IS_ERR(sb)) {
-+ dpri("s%d: err %ld\n", bindex, PTR_ERR(br));
-+ return -1;
-+ }
-+
-+ dpri("s%d: {perm 0x%x, cnt %d}, "
-+ "%s, flags 0x%lx, cnt(BIAS) %d, active %d, xino %p %p\n",
-+ bindex, br->br_perm, br_count(br),
-+ au_sbtype(sb), sb->s_flags, sb->s_count - S_BIAS,
-+ atomic_read(&sb->s_active), br->br_xino,
-+ br->br_xino ? br->br_xino->f_dentry : NULL);
-+ return 0;
-+}
-+
-+void au_dpri_sb(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ aufs_bindex_t bindex;
-+ int err;
-+ struct vfsmount mnt = {.mnt_sb = sb};
-+ struct aufs_branch fake = {
-+ .br_perm = 0,
-+ .br_mnt = &mnt,
-+ .br_count = ATOMIC_INIT(0),
-+ .br_xino = NULL
-+ };
-+
-+ atomic_set(&fake.br_count, 0);
-+ err = do_pri_br(-1, &fake);
-+ dpri("dev 0x%x\n", sb->s_dev);
-+ if (err || !au_is_aufs(sb))
-+ return;
-+
-+ sbinfo = stosi(sb);
-+ if (!sbinfo)
-+ return;
-+ for (bindex = 0; bindex <= sbinfo->si_bend; bindex++) {
-+ //dpri("bindex %d\n", bindex);
-+ do_pri_br(bindex, sbinfo->si_branch[0 + bindex]);
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void DbgSleep(int sec)
-+{
-+ static DECLARE_WAIT_QUEUE_HEAD(wq);
-+ Dbg("sleep %d sec\n", sec);
-+ wait_event_timeout(wq, 0, sec * HZ);
-+}
-diff --git a/fs/aufs/debug.h b/fs/aufs/debug.h
-new file mode 100755
-index 0000000..53f5f6a
---- /dev/null
-+++ b/fs/aufs/debug.h
-@@ -0,0 +1,129 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: debug.h,v 1.31 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_DEBUG_H__
-+#define __AUFS_DEBUG_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+#define DEBUG_ON(a) BUG_ON(a)
-+extern atomic_t aufs_cond;
-+#define au_debug_on() atomic_inc(&aufs_cond)
-+#define au_debug_off() atomic_dec(&aufs_cond)
-+#define au_is_debug() atomic_read(&aufs_cond)
-+#else
-+#define DEBUG_ON(a) /* */
-+#define au_debug_on() /* */
-+#define au_debug_off() /* */
-+#define au_is_debug() 0
-+#endif
-+
-+#define MtxMustLock(mtx) DEBUG_ON(!mutex_is_locked(mtx))
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* debug print */
-+#if defined(CONFIG_LKTR) || defined(CONFIG_LKTR_MODULE)
-+#include <linux/lktr.h>
-+#ifdef CONFIG_AUFS_DEBUG
-+#undef LktrCond
-+#define LktrCond unlikely((lktr_cond && lktr_cond()) || au_is_debug())
-+#endif
-+#else
-+#define LktrCond au_is_debug()
-+#define LKTRDumpVma(pre, vma, suf) /* */
-+#define LKTRDumpStack() /* */
-+#define LKTRTrace(fmt, args...) do { \
-+ if (LktrCond) \
-+ Dbg(fmt, ##args); \
-+} while (0)
-+#define LKTRLabel(label) LKTRTrace("%s\n", #label)
-+#endif /* CONFIG_LKTR */
-+
-+#define TraceErr(e) do { \
-+ if (unlikely((e) < 0)) \
-+ LKTRTrace("err %d\n", (int)(e)); \
-+} while (0)
-+#define TraceErrPtr(p) do { \
-+ if (IS_ERR(p)) \
-+ LKTRTrace("err %ld\n", PTR_ERR(p)); \
-+} while (0)
-+#define TraceEnter() LKTRLabel(enter)
-+
-+/* dirty macros for debug print, use with "%.*s" and caution */
-+#define LNPair(qstr) (qstr)->len,(qstr)->name
-+#define DLNPair(d) LNPair(&(d)->d_name)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define Dpri(lvl, fmt, arg...) \
-+ printk(lvl AUFS_NAME " %s:%d:%s[%d]: " fmt, \
-+ __func__, __LINE__, current->comm, current->pid, ##arg)
-+#define Dbg(fmt, arg...) Dpri(KERN_DEBUG, fmt, ##arg)
-+#define Warn(fmt, arg...) Dpri(KERN_WARNING, fmt, ##arg)
-+#define Warn1(fmt, arg...) do { \
-+ static unsigned char c; \
-+ if (!c++) Warn(fmt, ##arg); \
-+ } while (0)
-+#define Err(fmt, arg...) Dpri(KERN_ERR, fmt, ##arg)
-+#define Err1(fmt, arg...) do { \
-+ static unsigned char c; \
-+ if (!c++) Err(fmt, ##arg); \
-+ } while (0)
-+#define IOErr(fmt, arg...) Err("I/O Error, " fmt, ##arg)
-+#define IOErr1(fmt, arg...) do { \
-+ static unsigned char c; \
-+ if (!c++) IOErr(fmt, ##arg); \
-+ } while (0)
-+#define IOErrWhck(fmt, arg...) Err("I/O Error, try whck. " fmt, ##arg)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+struct aufs_nhash;
-+void au_dpri_whlist(struct aufs_nhash *whlist);
-+struct aufs_vdir;
-+void au_dpri_vdir(struct aufs_vdir *vdir);
-+void au_dpri_inode(struct inode *inode);
-+void au_dpri_dentry(struct dentry *dentry);
-+void au_dpri_file(struct file *filp);
-+void au_dpri_sb(struct super_block *sb);
-+#define DbgWhlist(w) do{LKTRTrace(#w "\n"); au_dpri_whlist(w);}while(0)
-+#define DbgVdir(v) do{LKTRTrace(#v "\n"); au_dpri_vdir(v);}while(0)
-+#define DbgInode(i) do{LKTRTrace(#i "\n"); au_dpri_inode(i);}while(0)
-+#define DbgDentry(d) do{LKTRTrace(#d "\n"); au_dpri_dentry(d);}while(0)
-+#define DbgFile(f) do{LKTRTrace(#f "\n"); au_dpri_file(f);}while(0)
-+#define DbgSb(sb) do{LKTRTrace(#sb "\n"); au_dpri_sb(sb);}while(0)
-+void DbgSleep(int sec);
-+#else
-+#define DbgWhlist(w) /* */
-+#define DbgVdir(v) /* */
-+#define DbgInode(i) /* */
-+#define DbgDentry(d) /* */
-+#define DbgFile(f) /* */
-+#define DbgSb(sb) /* */
-+#define DbgSleep(sec) /* */
-+#endif
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_DEBUG_H__ */
-diff --git a/fs/aufs/dentry.c b/fs/aufs/dentry.c
-new file mode 100755
-index 0000000..2acb89b
---- /dev/null
-+++ b/fs/aufs/dentry.c
-@@ -0,0 +1,946 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dentry.c,v 1.41 2007/05/14 03:38:38 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include "aufs.h"
-+
-+#ifdef CONFIG_AUFS_LHASH_PATCH
-+
-+#ifdef CONFIG_AUFS_DLGT
-+struct lookup_hash_args {
-+ struct dentry **errp;
-+ struct qstr *name;
-+ struct dentry *base;
-+ struct nameidata *nd;
-+};
-+
-+static void call_lookup_hash(void *args)
-+{
-+ struct lookup_hash_args *a = args;
-+ *a->errp = __lookup_hash(a->name, a->base, a->nd);
-+}
-+#endif /* CONFIG_AUFS_DLGT */
-+
-+static struct dentry *lkup_hash(const char *name, struct dentry *parent,
-+ int len, struct lkup_args *lkup)
-+{
-+ struct dentry *dentry;
-+ char *p;
-+ unsigned long hash;
-+ struct qstr this;
-+ unsigned int c;
-+ struct nameidata tmp_nd;
-+
-+ dentry = ERR_PTR(-EACCES);
-+ this.name = name;
-+ this.len = len;
-+ if (unlikely(!len))
-+ goto out;
-+
-+ p = (void*)name;
-+ hash = init_name_hash();
-+ while (len--) {
-+ c = *p++;
-+ if (unlikely(c == '/' || c == '\0'))
-+ goto out;
-+ hash = partial_name_hash(c, hash);
-+ }
-+ this.hash = end_name_hash(hash);
-+
-+ memset(&tmp_nd, 0, sizeof(tmp_nd));
-+ tmp_nd.dentry = dget(parent);
-+ tmp_nd.mnt = mntget(lkup->nfsmnt);
-+#ifndef CONFIG_AUFS_DLGT
-+ dentry = __lookup_hash(&this, parent, &tmp_nd);
-+#else
-+ if (!lkup->dlgt)
-+ dentry = __lookup_hash(&this, parent, &tmp_nd);
-+ else {
-+ struct lookup_hash_args args = {
-+ .errp = &dentry,
-+ .name = &this,
-+ .base = parent,
-+ .nd = &tmp_nd
-+ };
-+ au_wkq_wait(call_lookup_hash, &args, /*dlgt*/1);
-+ }
-+#endif
-+ path_release(&tmp_nd);
-+
-+ out:
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+#elif defined(CONFIG_AUFS_DLGT)
-+static struct dentry *lkup_hash(const char *name, struct dentry *parent,
-+ int len, struct lkup_args *lkup)
-+{
-+ return ERR_PTR(-ENOSYS);
-+}
-+#endif
-+
-+#ifdef CONFIG_AUFS_DLGT
-+struct lookup_one_len_args {
-+ struct dentry **errp;
-+ const char *name;
-+ struct dentry *parent;
-+ int len;
-+};
-+
-+static void call_lookup_one_len(void *args)
-+{
-+ struct lookup_one_len_args *a = args;
-+ *a->errp = lookup_one_len(a->name, a->parent, a->len);
-+}
-+#endif /* CONFIG_AUFS_DLGT */
-+
-+#if defined(CONFIG_AUFS_LHASH_PATCH) || defined(CONFIG_AUFS_DLGT)
-+/* cf. lookup_one_len() in linux/fs/namei.c */
-+struct dentry *lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup)
-+{
-+ struct dentry *dentry;
-+
-+ LKTRTrace("%.*s/%.*s, lkup{%p, %d}\n",
-+ DLNPair(parent), len, name, lkup->nfsmnt, lkup->dlgt);
-+
-+ if (!lkup->nfsmnt) {
-+#ifndef CONFIG_AUFS_DLGT
-+ dentry = lookup_one_len(name, parent, len);
-+#else
-+ if (!lkup->dlgt)
-+ dentry = lookup_one_len(name, parent, len);
-+ else {
-+ struct lookup_one_len_args args = {
-+ .errp = &dentry,
-+ .name = name,
-+ .parent = parent,
-+ .len = len
-+ };
-+ au_wkq_wait(call_lookup_one_len, &args, /*dlgt*/1);
-+ }
-+#endif
-+ } else
-+ dentry = lkup_hash(name, parent, len, lkup);
-+
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+#endif
-+
-+struct lkup_one_args {
-+ struct dentry **errp;
-+ const char *name;
-+ struct dentry *parent;
-+ int len;
-+ struct lkup_args *lkup;
-+};
-+
-+static void call_lkup_one(void *args)
-+{
-+ struct lkup_one_args *a = args;
-+ *a->errp = lkup_one(a->name, a->parent, a->len, a->lkup);
-+}
-+
-+/*
-+ * returns positive/negative dentry, NULL or an error.
-+ * NULL means whiteout-ed or not-found.
-+ */
-+static struct dentry *do_lookup(struct dentry *hidden_parent,
-+ struct dentry *dentry, aufs_bindex_t bindex,
-+ struct qstr *wh_name, int allow_neg,
-+ mode_t type, int dlgt)
-+{
-+ struct dentry *hidden_dentry;
-+ int wh_found, wh_able, opq;
-+ struct inode *hidden_dir, *hidden_inode;
-+ struct qstr *name;
-+ struct super_block *sb;
-+ struct lkup_args lkup = {.dlgt = dlgt};
-+
-+ LKTRTrace("%.*s/%.*s, b%d, allow_neg %d, type 0%o, dlgt %d\n",
-+ DLNPair(hidden_parent), DLNPair(dentry), bindex, allow_neg,
-+ type, dlgt);
-+ DEBUG_ON(IS_ROOT(dentry));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ wh_found = 0;
-+ sb = dentry->d_sb;
-+ wh_able = sbr_is_whable(sb, bindex);
-+ lkup.nfsmnt = au_nfsmnt(sb, bindex);
-+ name = &dentry->d_name;
-+ if (unlikely(wh_able)) {
-+#if 0 //def CONFIG_AUFS_ROBR
-+ if (strncmp(name->name, AUFS_WH_PFX, AUFS_WH_PFX_LEN))
-+ wh_found = is_wh(hidden_parent, wh_name, /*try_sio*/0,
-+ &lkup);
-+ else
-+ wh_found = -EPERM;
-+#else
-+ wh_found = is_wh(hidden_parent, wh_name, /*try_sio*/0, &lkup);
-+#endif
-+ }
-+ //if (LktrCond) wh_found = -1;
-+ hidden_dentry = ERR_PTR(wh_found);
-+ if (!wh_found)
-+ goto real_lookup;
-+ if (unlikely(wh_found < 0))
-+ goto out;
-+
-+ /* We found a whiteout */
-+ //set_dbend(dentry, bindex);
-+ set_dbwh(dentry, bindex);
-+ if (!allow_neg)
-+ return NULL; /* success */
-+
-+ real_lookup:
-+ // do not superio.
-+ hidden_dentry = lkup_one(name->name, hidden_parent, name->len, &lkup);
-+ //if (LktrCond) {dput(hidden_dentry); hidden_dentry = ERR_PTR(-1);}
-+ if (IS_ERR(hidden_dentry))
-+ goto out;
-+ DEBUG_ON(d_unhashed(hidden_dentry));
-+ hidden_inode = hidden_dentry->d_inode;
-+ if (!hidden_inode) {
-+ if (!allow_neg)
-+ goto out_neg;
-+ } else if (wh_found
-+ || (type && type != (hidden_inode->i_mode & S_IFMT)))
-+ goto out_neg;
-+
-+ if (dbend(dentry) <= bindex)
-+ set_dbend(dentry, bindex);
-+ if (dbstart(dentry) == -1 || bindex < dbstart(dentry))
-+ set_dbstart(dentry, bindex);
-+ set_h_dptr(dentry, bindex, hidden_dentry);
-+
-+ if (!hidden_inode || !S_ISDIR(hidden_inode->i_mode) || !wh_able)
-+ return hidden_dentry; /* success */
-+
-+ hi_lock_child(hidden_inode);
-+ opq = is_diropq(hidden_dentry, &lkup);
-+ //if (LktrCond) opq = -1;
-+ i_unlock(hidden_inode);
-+ if (opq > 0)
-+ set_dbdiropq(dentry, bindex);
-+ else if (unlikely(opq < 0)) {
-+ set_h_dptr(dentry, bindex, NULL);
-+ hidden_dentry = ERR_PTR(opq);
-+ }
-+ goto out;
-+
-+ out_neg:
-+ dput(hidden_dentry);
-+ hidden_dentry = NULL;
-+ out:
-+ TraceErrPtr(hidden_dentry);
-+ return hidden_dentry;
-+}
-+
-+/*
-+ * returns the number of hidden positive dentries,
-+ * otherwise an error.
-+ */
-+int lkup_dentry(struct dentry *dentry, aufs_bindex_t bstart, mode_t type)
-+{
-+ int npositive, err, allow_neg, dlgt;
-+ struct dentry *parent;
-+ aufs_bindex_t bindex, btail;
-+ const struct qstr *name = &dentry->d_name;
-+ struct qstr whname;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, b%d, type 0%o\n", LNPair(name), bstart, type);
-+ DEBUG_ON(bstart < 0 || IS_ROOT(dentry));
-+ parent = dget_parent(dentry);
-+
-+#if 1 //ndef CONFIG_AUFS_ROBR
-+ err = -EPERM;
-+ if (unlikely(!strncmp(name->name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)))
-+ goto out;
-+#endif
-+
-+ err = au_alloc_whname(name->name, name->len, &whname);
-+ //if (LktrCond) {au_free_whname(&whname); err = -1;}
-+ if (unlikely(err))
-+ goto out;
-+
-+ sb = dentry->d_sb;
-+ dlgt = need_dlgt(sb);
-+ allow_neg = !type;
-+ npositive = 0;
-+ btail = dbtaildir(parent);
-+ for (bindex = bstart; bindex <= btail; bindex++) {
-+ struct dentry *hidden_parent, *hidden_dentry;
-+ struct inode *hidden_inode;
-+ struct inode *hidden_dir;
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (hidden_dentry) {
-+ if (hidden_dentry->d_inode)
-+ npositive++;
-+ if (type != S_IFDIR)
-+ break;
-+ continue;
-+ }
-+ hidden_parent = au_h_dptr_i(parent, bindex);
-+ if (!hidden_parent)
-+ continue;
-+ hidden_dir = hidden_parent->d_inode;
-+ if (!hidden_dir || !S_ISDIR(hidden_dir->i_mode))
-+ continue;
-+
-+ hi_lock_parent(hidden_dir);
-+ hidden_dentry = do_lookup(hidden_parent, dentry, bindex,
-+ &whname, allow_neg, type, dlgt);
-+ // do not dput for testing
-+ //if (LktrCond) {hidden_dentry = ERR_PTR(-1);}
-+ i_unlock(hidden_dir);
-+ err = PTR_ERR(hidden_dentry);
-+ if (IS_ERR(hidden_dentry))
-+ goto out_wh;
-+ allow_neg = 0;
-+
-+ if (dbwh(dentry) != -1)
-+ break;
-+ if (!hidden_dentry)
-+ continue;
-+ hidden_inode = hidden_dentry->d_inode;
-+ if (!hidden_inode)
-+ continue;
-+ npositive++;
-+ if (!type)
-+ type = hidden_inode->i_mode & S_IFMT;
-+ if (type != S_IFDIR)
-+ break;
-+ else if (dbdiropq(dentry) != -1)
-+ break;
-+ }
-+
-+ if (npositive) {
-+ LKTRLabel(positive);
-+ au_update_dbstart(dentry);
-+ }
-+ err = npositive;
-+
-+ out_wh:
-+ au_free_whname(&whname);
-+ out:
-+ dput(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct dentry *sio_lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup)
-+{
-+ struct dentry *dentry;
-+
-+ LKTRTrace("%.*s/%.*s\n", DLNPair(parent), len, name);
-+ IMustLock(parent->d_inode);
-+
-+ if (!au_test_perm(parent->d_inode, MAY_EXEC, lkup->dlgt))
-+ dentry = lkup_one(name, parent, len, lkup);
-+ else {
-+ // ugly
-+ int dlgt = lkup->dlgt;
-+ struct lkup_one_args args = {
-+ .errp = &dentry,
-+ .name = name,
-+ .parent = parent,
-+ .len = len,
-+ .lkup = lkup
-+ };
-+
-+ lkup->dlgt = 0;
-+ au_wkq_wait(call_lkup_one, &args, /*dlgt*/0);
-+ lkup->dlgt = dlgt;
-+ }
-+
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+
-+/*
-+ * lookup @dentry on @bindex which should be negative.
-+ */
-+int lkup_neg(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ int err;
-+ struct dentry *parent, *hidden_parent, *hidden_dentry;
-+ struct inode *hidden_dir;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, b%d\n", DLNPair(dentry), bindex);
-+ parent = dget_parent(dentry);
-+ DEBUG_ON(!parent || !parent->d_inode
-+ || !S_ISDIR(parent->d_inode->i_mode));
-+ hidden_parent = au_h_dptr_i(parent, bindex);
-+ DEBUG_ON(!hidden_parent);
-+ hidden_dir = hidden_parent->d_inode;
-+ DEBUG_ON(!hidden_dir || !S_ISDIR(hidden_dir->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ lkup.nfsmnt = au_nfsmnt(dentry->d_sb, bindex);
-+ lkup.dlgt = need_dlgt(dentry->d_sb);
-+ hidden_dentry = sio_lkup_one(dentry->d_name.name, hidden_parent,
-+ dentry->d_name.len, &lkup);
-+ //if (LktrCond) {dput(hidden_dentry); hidden_dentry = ERR_PTR(-1);}
-+ err = PTR_ERR(hidden_dentry);
-+ if (IS_ERR(hidden_dentry))
-+ goto out;
-+ if (unlikely(hidden_dentry->d_inode)) {
-+ err = -EIO;
-+ IOErr("b%d %.*s should be negative.%s\n",
-+ bindex, DLNPair(hidden_dentry),
-+ au_flag_test(dentry->d_sb, AuFlag_UDBA_INOTIFY) ? "" :
-+ " Try udba=inotify.");
-+ dput(hidden_dentry);
-+ goto out;
-+ }
-+
-+ if (bindex < dbstart(dentry))
-+ set_dbstart(dentry, bindex);
-+ if (dbend(dentry) < bindex)
-+ set_dbend(dentry, bindex);
-+ set_h_dptr(dentry, bindex, hidden_dentry);
-+ err = 0;
-+
-+ out:
-+ dput(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * returns the number of found hidden positive dentries,
-+ * otherwise an error.
-+ */
-+int au_refresh_hdentry(struct dentry *dentry, mode_t type)
-+{
-+ int npositive, pgen, new_sz, sgen, dgen;
-+ struct aufs_dinfo *dinfo;
-+ struct super_block *sb;
-+ struct dentry *parent;
-+ aufs_bindex_t bindex, parent_bend, parent_bstart, bwh, bdiropq, bend;
-+ struct aufs_hdentry *p;
-+ //struct nameidata nd;
-+
-+ LKTRTrace("%.*s, type 0%o\n", DLNPair(dentry), type);
-+ DiMustWriteLock(dentry);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(IS_ROOT(dentry));
-+ parent = dget_parent(dentry);
-+ pgen = au_digen(parent);
-+ sgen = au_sigen(sb);
-+ dgen = au_digen(dentry);
-+ DEBUG_ON(pgen != sgen);
-+
-+ npositive = -ENOMEM;
-+ new_sz = sizeof(*dinfo->di_hdentry) * (sbend(sb) + 1);
-+ dinfo = dtodi(dentry);
-+ p = au_kzrealloc(dinfo->di_hdentry, sizeof(*p) * (dinfo->di_bend + 1),
-+ new_sz, GFP_KERNEL);
-+ //p = NULL;
-+ if (unlikely(!p))
-+ goto out;
-+ dinfo->di_hdentry = p;
-+
-+ bend = dinfo->di_bend;
-+ bwh = dinfo->di_bwh;
-+ bdiropq = dinfo->di_bdiropq;
-+ p += dinfo->di_bstart;
-+ for (bindex = dinfo->di_bstart; bindex <= bend; bindex++, p++) {
-+ struct dentry *hd, *hdp;
-+ struct aufs_hdentry tmp, *q;
-+ aufs_bindex_t new_bindex;
-+
-+ hd = p->hd_dentry;
-+ if (!hd)
-+ continue;
-+ hdp = dget_parent(hd);
-+ if (hdp == au_h_dptr_i(parent, bindex)) {
-+ dput(hdp);
-+ continue;
-+ }
-+
-+ new_bindex = au_find_dbindex(parent, hdp);
-+ dput(hdp);
-+ DEBUG_ON(new_bindex == bindex);
-+ if (dinfo->di_bwh == bindex)
-+ bwh = new_bindex;
-+ if (dinfo->di_bdiropq == bindex)
-+ bdiropq = new_bindex;
-+ if (new_bindex < 0) { // test here
-+ hdput(p);
-+ p->hd_dentry = NULL;
-+ continue;
-+ }
-+ /* swap two hidden dentries, and loop again */
-+ q = dinfo->di_hdentry + new_bindex;
-+ tmp = *q;
-+ *q = *p;
-+ *p = tmp;
-+ if (tmp.hd_dentry) {
-+ bindex--;
-+ p--;
-+ }
-+ }
-+
-+ // test here
-+ dinfo->di_bwh = -1;
-+ if (unlikely(bwh != -1 && bwh <= sbend(sb) && sbr_is_whable(sb, bwh)))
-+ dinfo->di_bwh = bwh;
-+ dinfo->di_bdiropq = -1;
-+ if (unlikely(bdiropq != -1 && bdiropq <= sbend(sb)
-+ && sbr_is_whable(sb, bdiropq)))
-+ dinfo->di_bdiropq = bdiropq;
-+ parent_bend = dbend(parent);
-+ p = dinfo->di_hdentry;
-+ for (bindex = 0; bindex <= parent_bend; bindex++, p++)
-+ if (p->hd_dentry) {
-+ dinfo->di_bstart = bindex;
-+ break;
-+ }
-+ p = dinfo->di_hdentry + parent_bend;
-+ //for (bindex = parent_bend; bindex > dinfo->di_bstart; bindex--, p--)
-+ for (bindex = parent_bend; bindex >= 0; bindex--, p--)
-+ if (p->hd_dentry) {
-+ dinfo->di_bend = bindex;
-+ break;
-+ }
-+
-+ npositive = 0;
-+ parent_bstart = dbstart(parent);
-+ if (type != S_IFDIR && dinfo->di_bstart == parent_bstart)
-+ goto out_dgen; /* success */
-+
-+#if 0
-+ nd.last_type = LAST_ROOT;
-+ nd.flags = LOOKUP_FOLLOW;
-+ nd.depth = 0;
-+ nd.mnt = mntget(??);
-+ nd.dentry = dget(parent);
-+#endif
-+ npositive = lkup_dentry(dentry, parent_bstart, type);
-+ //if (LktrCond) npositive = -1;
-+ if (npositive < 0)
-+ goto out;
-+
-+ out_dgen:
-+ au_update_digen(dentry);
-+ out:
-+ dput(parent);
-+ TraceErr(npositive);
-+ return npositive;
-+}
-+
-+static int h_d_revalidate(struct dentry *dentry, struct nameidata *nd,
-+ int do_udba)
-+{
-+ int err, plus, locked, unhashed, is_root, h_plus, is_nfs;
-+ struct nameidata fake_nd, *p;
-+ aufs_bindex_t bindex, btail, bstart, ibs, ibe;
-+ struct super_block *sb;
-+ struct inode *inode, *first, *h_inode, *h_cached_inode;
-+ umode_t mode, h_mode;
-+ struct dentry *h_dentry;
-+ int (*reval)(struct dentry *, struct nameidata *);
-+ struct qstr *name;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(inode && au_digen(dentry) != au_iigen(inode));
-+ //DbgDentry(dentry);
-+ //DbgInode(inode);
-+
-+ err = 0;
-+ sb = dentry->d_sb;
-+ plus = 0;
-+ mode = 0;
-+ first = NULL;
-+ ibs = ibe = -1;
-+ unhashed = d_unhashed(dentry);
-+ is_root = IS_ROOT(dentry);
-+ name = &dentry->d_name;
-+
-+ /*
-+ * Theoretically, REVAL test should be unnecessary in case of INOTIFY.
-+ * But inotify doesn't fire some necessary events,
-+ * IN_ATTRIB for atime/nlink/pageio
-+ * IN_DELETE for NFS dentry
-+ * Let's do REVAL test too.
-+ */
-+ if (do_udba && inode) {
-+ mode = (inode->i_mode & S_IFMT);
-+ plus = (inode->i_nlink > 0);
-+ first = au_h_iptr(inode);
-+ ibs = ibstart(inode);
-+ ibe = ibend(inode);
-+ }
-+
-+ btail = bstart = dbstart(dentry);
-+ if (inode && S_ISDIR(inode->i_mode))
-+ btail = dbtaildir(dentry);
-+ locked = 0;
-+ if (nd) {
-+ fake_nd = *nd;
-+#ifndef CONFIG_AUFS_FAKE_DM
-+ if (dentry != nd->dentry) {
-+ di_read_lock_parent(nd->dentry, 0);
-+ locked = 1;
-+ }
-+#endif
-+ }
-+ for (bindex = bstart; bindex <= btail; bindex++) {
-+ h_dentry = au_h_dptr_i(dentry, bindex);
-+ if (unlikely(!h_dentry))
-+ continue;
-+ if (unlikely(do_udba
-+ && !is_root
-+ && (unhashed != d_unhashed(h_dentry)
-+#if 1
-+ || name->len != h_dentry->d_name.len
-+ || memcmp(name->name, h_dentry->d_name.name,
-+ name->len)
-+#endif
-+ ))) {
-+ LKTRTrace("unhash 0x%x 0x%x, %.*s %.*s\n",
-+ unhashed, d_unhashed(h_dentry),
-+ DLNPair(dentry), DLNPair(h_dentry));
-+ goto err;
-+ }
-+
-+ reval = NULL;
-+ if (h_dentry->d_op)
-+ reval = h_dentry->d_op->d_revalidate;
-+ if (unlikely(reval)) {
-+ //LKTRLabel(hidden reval);
-+ p = fake_dm(&fake_nd, nd, sb, bindex);
-+ DEBUG_ON(IS_ERR(p));
-+ err = !reval(h_dentry, p);
-+ fake_dm_release(p);
-+ if (unlikely(err)) {
-+ //Dbg("here\n");
-+ goto err;
-+ }
-+ }
-+
-+ if (unlikely(!do_udba))
-+ continue;
-+
-+ /* UDBA tests */
-+ h_inode = h_dentry->d_inode;
-+ if (unlikely(!!inode != !!h_inode)) {
-+ //Dbg("here\n");
-+ goto err;
-+ }
-+
-+ h_plus = plus;
-+ h_mode = mode;
-+ h_cached_inode = h_inode;
-+ is_nfs = 0;
-+ if (h_inode) {
-+ h_mode = (h_inode->i_mode & S_IFMT);
-+ h_plus = (h_inode->i_nlink > 0);
-+ }
-+ if (inode && ibs <= bindex && bindex <= ibe) {
-+ h_cached_inode = au_h_iptr_i(inode, bindex);
-+ //is_nfs = au_is_nfs(h_cached_inode->i_sb);
-+ }
-+
-+ LKTRTrace("{%d, 0%o, %p}, h{%d, 0%o, %p}\n",
-+ plus, mode, h_cached_inode,
-+ h_plus, h_mode, h_inode);
-+ if (unlikely(plus != h_plus || mode != h_mode
-+ || (h_cached_inode != h_inode /* && !is_nfs */))) {
-+ //Dbg("here\n");
-+ goto err;
-+ }
-+ continue;
-+
-+ err:
-+ err = -EINVAL;
-+ break;
-+ }
-+#ifndef CONFIG_AUFS_FAKE_DM
-+ if (unlikely(locked))
-+ di_read_unlock(nd->dentry, 0);
-+#endif
-+
-+#if 0
-+ // some filesystem uses CURRENT_TIME_SEC instead of CURRENT_TIME.
-+ // NFS may stop IN_DELETE because of DCACHE_NFSFS_RENAMED.
-+#if 0
-+ && (!timespec_equal(&inode->i_ctime, &first->i_ctime)
-+ || !timespec_equal(&inode->i_atime, &first->i_atime))
-+#endif
-+ if (unlikely(!err && udba && first))
-+ au_cpup_attr_all(inode);
-+#endif
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int simple_reval_dpath(struct dentry *dentry, int sgen)
-+{
-+ int err;
-+ mode_t type;
-+ struct dentry *parent;
-+ struct inode *inode;
-+
-+ LKTRTrace("%.*s, sgen %d\n", DLNPair(dentry), sgen);
-+ SiMustAnyLock(dentry->d_sb);
-+ DiMustWriteLock(dentry);
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode);
-+
-+ if (au_digen(dentry) == sgen)
-+ return 0;
-+
-+ parent = dget_parent(dentry);
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ DEBUG_ON(au_digen(parent) != sgen);
-+#ifdef CONFIG_AUFS_DEBUG
-+ {
-+ struct dentry *d = parent;
-+ while (!IS_ROOT(d)) {
-+ DEBUG_ON(au_digen(d) != sgen);
-+ d = d->d_parent;
-+ }
-+ }
-+#endif
-+ type = (inode->i_mode & S_IFMT);
-+ /* returns a number of positive dentries */
-+ err = au_refresh_hdentry(dentry, type);
-+ if (err >= 0)
-+ err = au_refresh_hinode(inode, dentry);
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ dput(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_reval_dpath(struct dentry *dentry, int sgen)
-+{
-+ int err;
-+ struct dentry *d, *parent;
-+ struct inode *inode;
-+
-+ LKTRTrace("%.*s, sgen %d\n", DLNPair(dentry), sgen);
-+ DEBUG_ON(!dentry->d_inode);
-+ DiMustWriteLock(dentry);
-+
-+ if (!stosi(dentry->d_sb)->si_failed_refresh_dirs)
-+ return simple_reval_dpath(dentry, sgen);
-+
-+ /* slow loop, keep it simple and stupid */
-+ /* cf: cpup_dirs() */
-+ err = 0;
-+ while (au_digen(dentry) != sgen) {
-+ d = dentry;
-+ while (1) {
-+ parent = d->d_parent; // dget_parent()
-+ if (au_digen(parent) == sgen)
-+ break;
-+ d = parent;
-+ }
-+
-+ inode = d->d_inode;
-+ if (d != dentry) {
-+ //i_lock(inode);
-+ di_write_lock_child(d);
-+ }
-+
-+ /* someone might update our dentry while we were sleeping */
-+ if (au_digen(d) != sgen) {
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ /* returns a number of positive dentries */
-+ err = au_refresh_hdentry(d, inode->i_mode & S_IFMT);
-+ //err = -1;
-+ if (err >= 0)
-+ err = au_refresh_hinode(inode, d);
-+ //err = -1;
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ }
-+
-+ if (d != dentry) {
-+ di_write_unlock(d);
-+ //i_unlock(inode);
-+ }
-+ if (unlikely(err))
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * THIS IS A BOOLEAN FUNCTION: returns 1 if valid, 0 otherwise.
-+ * nfsd passes NULL as nameidata.
-+ */
-+static int aufs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
-+{
-+ int valid, sgen, err, do_udba;
-+ struct super_block *sb;
-+ struct inode *inode;
-+
-+ LKTRTrace("dentry %.*s\n", DLNPair(dentry));
-+ if (nd && nd->dentry)
-+ LKTRTrace("nd %.*s\n", DLNPair(nd->dentry));
-+ //dir case: DEBUG_ON(dentry->d_parent != nd->dentry);
-+ //remove failure case: DEBUG_ON(!IS_ROOT(dentry) && d_unhashed(dentry));
-+ DEBUG_ON(!dentry->d_fsdata);
-+ //DbgDentry(dentry);
-+
-+ err = -EINVAL;
-+ inode = dentry->d_inode;
-+ //DbgInode(inode);
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ sgen = au_sigen(sb);
-+ if (au_digen(dentry) == sgen)
-+ di_read_lock_child(dentry, !AUFS_I_RLOCK);
-+ else {
-+ DEBUG_ON(IS_ROOT(dentry));
-+#ifdef ForceInotify
-+ Dbg("UDBA or digen, %.*s\n", DLNPair(dentry));
-+#endif
-+ //i_lock(inode);
-+ di_write_lock_child(dentry);
-+ if (inode)
-+ err = au_reval_dpath(dentry, sgen);
-+ //err = -1;
-+ di_downgrade_lock(dentry, AUFS_I_RLOCK);
-+ //i_unlock(inode);
-+ if (unlikely(err))
-+ goto out;
-+ ii_read_unlock(inode);
-+ DEBUG_ON(au_iigen(inode) != sgen);
-+ }
-+
-+ if (inode) {
-+ if (au_iigen(inode) == sgen)
-+ ii_read_lock_child(inode);
-+ else {
-+ DEBUG_ON(IS_ROOT(dentry));
-+#ifdef ForceInotify
-+ Dbg("UDBA or survived, %.*s\n", DLNPair(dentry));
-+#endif
-+ ii_write_lock_child(inode);
-+ err = au_refresh_hinode(inode, dentry);
-+ ii_downgrade_lock(inode);
-+ if (unlikely(err))
-+ goto out;
-+ DEBUG_ON(au_iigen(inode) != sgen);
-+ }
-+ }
-+
-+#if 0 // fix it
-+ /* parent dir i_nlink is not updated in the case of setattr */
-+ if (S_ISDIR(inode->i_mode)) {
-+ i_lock(inode);
-+ ii_write_lock(inode);
-+ au_cpup_attr_nlink(inode);
-+ ii_write_unlock(inode);
-+ i_unlock(inode);
-+ }
-+#endif
-+
-+ err = -EINVAL;
-+ do_udba = !au_flag_test(sb, AuFlag_UDBA_NONE);
-+ if (do_udba && inode && ibstart(inode) >= 0
-+ && au_test_higen(inode, au_h_iptr(inode)))
-+ goto out;
-+ err = h_d_revalidate(dentry, nd, do_udba);
-+ //err = -1;
-+
-+ out:
-+ aufs_read_unlock(dentry, AUFS_I_RLOCK);
-+ TraceErr(err);
-+ valid = !err;
-+ //au_debug_on();
-+ if (!valid)
-+ LKTRTrace("%.*s invalid\n", DLNPair(dentry));
-+ //au_debug_off();
-+ return valid;
-+}
-+
-+static void aufs_d_release(struct dentry *dentry)
-+{
-+ struct aufs_dinfo *dinfo;
-+ aufs_bindex_t bend, bindex;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(!d_unhashed(dentry));
-+
-+ dinfo = dentry->d_fsdata;
-+ if (unlikely(!dinfo))
-+ return;
-+
-+ /* dentry may not be revalidated */
-+ bindex = dinfo->di_bstart;
-+ if (bindex >= 0) {
-+ struct aufs_hdentry *p;
-+ bend = dinfo->di_bend;
-+ DEBUG_ON(bend < bindex);
-+ p = dinfo->di_hdentry + bindex;
-+ while (bindex++ <= bend) {
-+ if (p->hd_dentry)
-+ hdput(p);
-+ p++;
-+ }
-+ }
-+ kfree(dinfo->di_hdentry);
-+ cache_free_dinfo(dinfo);
-+}
-+
-+#if 0
-+/* it may be called at remount time, too */
-+static void aufs_d_iput(struct dentry *dentry, struct inode *inode)
-+{
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, i%lu\n", DLNPair(dentry), inode->i_ino);
-+
-+ sb = dentry->d_sb;
-+#if 0
-+ si_read_lock(sb);
-+ if (unlikely(au_flag_test(sb, AuFlag_PLINK)
-+ && au_is_plinked(sb, inode))) {
-+ ii_write_lock(inode);
-+ au_update_brange(inode, 1);
-+ ii_write_unlock(inode);
-+ }
-+ si_read_unlock(sb);
-+#endif
-+ iput(inode);
-+}
-+#endif
-+
-+struct dentry_operations aufs_dop = {
-+ .d_revalidate = aufs_d_revalidate,
-+ .d_release = aufs_d_release
-+ //.d_iput = aufs_d_iput
-+};
-diff --git a/fs/aufs/dentry.h b/fs/aufs/dentry.h
-new file mode 100755
-index 0000000..78049e3
---- /dev/null
-+++ b/fs/aufs/dentry.h
-@@ -0,0 +1,183 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dentry.h,v 1.25 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_DENTRY_H__
-+#define __AUFS_DENTRY_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+
-+struct aufs_hdentry {
-+ struct dentry *hd_dentry;
-+};
-+
-+struct aufs_dinfo {
-+ atomic_t di_generation;
-+
-+ struct aufs_rwsem di_rwsem;
-+ aufs_bindex_t di_bstart, di_bend, di_bwh, di_bdiropq;
-+ struct aufs_hdentry *di_hdentry;
-+};
-+
-+struct lkup_args {
-+ struct vfsmount *nfsmnt;
-+ int dlgt;
-+ //struct super_block *sb;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* dentry.c */
-+#if defined(CONFIG_AUFS_LHASH_PATCH) || defined(CONFIG_AUFS_DLGT)
-+struct dentry *lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup);
-+#else
-+static inline
-+struct dentry *lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup)
-+{
-+ return lookup_one_len(name, parent, len);
-+}
-+#endif
-+
-+extern struct dentry_operations aufs_dop;
-+struct dentry *sio_lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup);
-+int lkup_dentry(struct dentry *dentry, aufs_bindex_t bstart, mode_t type);
-+int lkup_neg(struct dentry *dentry, aufs_bindex_t bindex);
-+int au_refresh_hdentry(struct dentry *dentry, mode_t type);
-+int au_reval_dpath(struct dentry *dentry, int sgen);
-+
-+/* dinfo.c */
-+int au_alloc_dinfo(struct dentry *dentry);
-+struct aufs_dinfo *dtodi(struct dentry *dentry);
-+
-+void di_read_lock(struct dentry *d, int flags, unsigned int lsc);
-+void di_read_unlock(struct dentry *d, int flags);
-+void di_downgrade_lock(struct dentry *d, int flags);
-+void di_write_lock(struct dentry *d, unsigned int lsc);
-+void di_write_unlock(struct dentry *d);
-+void di_write_lock2_child(struct dentry *d1, struct dentry *d2, int isdir);
-+void di_write_lock2_parent(struct dentry *d1, struct dentry *d2, int isdir);
-+void di_write_unlock2(struct dentry *d1, struct dentry *d2);
-+
-+aufs_bindex_t dbstart(struct dentry *dentry);
-+aufs_bindex_t dbend(struct dentry *dentry);
-+aufs_bindex_t dbwh(struct dentry *dentry);
-+aufs_bindex_t dbdiropq(struct dentry *dentry);
-+struct dentry *au_h_dptr_i(struct dentry *dentry, aufs_bindex_t bindex);
-+struct dentry *au_h_dptr(struct dentry *dentry);
-+
-+aufs_bindex_t dbtail(struct dentry *dentry);
-+aufs_bindex_t dbtaildir(struct dentry *dentry);
-+aufs_bindex_t dbtail_generic(struct dentry *dentry);
-+
-+void set_dbstart(struct dentry *dentry, aufs_bindex_t bindex);
-+void set_dbend(struct dentry *dentry, aufs_bindex_t bindex);
-+void set_dbwh(struct dentry *dentry, aufs_bindex_t bindex);
-+void set_dbdiropq(struct dentry *dentry, aufs_bindex_t bindex);
-+void hdput(struct aufs_hdentry *hdentry);
-+void set_h_dptr(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct dentry *h_dentry);
-+
-+void au_update_digen(struct dentry *dentry);
-+void au_update_dbstart(struct dentry *dentry);
-+int au_find_dbindex(struct dentry *dentry, struct dentry *h_dentry);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline int au_digen(struct dentry *d)
-+{
-+ return atomic_read(&dtodi(d)->di_generation);
-+}
-+
-+#ifdef CONFIG_AUFS_HINOTIFY
-+static inline void au_digen_dec(struct dentry *d)
-+{
-+ atomic_dec(&dtodi(d)->di_generation);
-+}
-+#endif /* CONFIG_AUFS_HINOTIFY */
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* lock subclass for dinfo */
-+enum {
-+ AuLsc_DI_CHILD, /* child first */
-+ AuLsc_DI_CHILD2, /* rename(2), link(2), and cpup at hinotify */
-+ AuLsc_DI_CHILD3, /* copyup dirs */
-+ AuLsc_DI_PARENT,
-+ AuLsc_DI_PARENT2,
-+ AuLsc_DI_PARENT3
-+};
-+
-+/*
-+ * di_read_lock_child, di_write_lock_child,
-+ * di_read_lock_child2, di_write_lock_child2,
-+ * di_read_lock_child3, di_write_lock_child3,
-+ * di_read_lock_parent, di_write_lock_parent,
-+ * di_read_lock_parent2, di_write_lock_parent2,
-+ * di_read_lock_parent3, di_write_lock_parent3,
-+ */
-+#define ReadLockFunc(name, lsc) \
-+static inline void di_read_lock_##name(struct dentry *d, int flags) \
-+{di_read_lock(d, flags, AuLsc_DI_##lsc);}
-+
-+#define WriteLockFunc(name, lsc) \
-+static inline void di_write_lock_##name(struct dentry *d) \
-+{di_write_lock(d, AuLsc_DI_##lsc);}
-+
-+#define RWLockFuncs(name, lsc) \
-+ ReadLockFunc(name, lsc); \
-+ WriteLockFunc(name, lsc)
-+
-+RWLockFuncs(child, CHILD);
-+RWLockFuncs(child2, CHILD2);
-+RWLockFuncs(child3, CHILD3);
-+RWLockFuncs(parent, PARENT);
-+RWLockFuncs(parent2, PARENT2);
-+RWLockFuncs(parent3, PARENT3);
-+
-+#undef ReadLockFunc
-+#undef WriteLockFunc
-+#undef RWLockFunc
-+
-+/* to debug easier, do not make them inlined functions */
-+#define DiMustReadLock(d) do { \
-+ SiMustAnyLock((d)->d_sb); \
-+ RwMustReadLock(&dtodi(d)->di_rwsem); \
-+} while (0)
-+
-+#define DiMustWriteLock(d) do { \
-+ SiMustAnyLock((d)->d_sb); \
-+ RwMustWriteLock(&dtodi(d)->di_rwsem); \
-+} while (0)
-+
-+#define DiMustAnyLock(d) do { \
-+ SiMustAnyLock((d)->d_sb); \
-+ RwMustAnyLock(&dtodi(d)->di_rwsem); \
-+} while (0)
-+
-+#define DiMustNoWaiters(d) RwMustNoWaiters(&dtodi(d)->di_rwsem)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_DENTRY_H__ */
-diff --git a/fs/aufs/dinfo.c b/fs/aufs/dinfo.c
-new file mode 100755
-index 0000000..6082149
---- /dev/null
-+++ b/fs/aufs/dinfo.c
-@@ -0,0 +1,419 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dinfo.c,v 1.23 2007/05/07 03:43:36 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+int au_alloc_dinfo(struct dentry *dentry)
-+{
-+ struct aufs_dinfo *dinfo;
-+ struct super_block *sb;
-+ int nbr;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(dentry->d_fsdata);
-+
-+ dinfo = cache_alloc_dinfo();
-+ //if (LktrCond) {cache_free_dinfo(dinfo); dinfo = NULL;}
-+ if (dinfo) {
-+ sb = dentry->d_sb;
-+ nbr = sbend(sb) + 1;
-+ if (unlikely(!nbr))
-+ nbr++;
-+ dinfo->di_hdentry = kcalloc(nbr, sizeof(*dinfo->di_hdentry),
-+ GFP_KERNEL);
-+ //if (LktrCond)
-+ //{kfree(dinfo->di_hdentry); dinfo->di_hdentry = NULL;}
-+ if (dinfo->di_hdentry) {
-+ rw_init_wlock_nested(&dinfo->di_rwsem, AuLsc_DI_PARENT);
-+ dinfo->di_bstart = dinfo->di_bend = -1;
-+ dinfo->di_bwh = dinfo->di_bdiropq = -1;
-+ atomic_set(&dinfo->di_generation, au_sigen(sb));
-+
-+ dentry->d_fsdata = dinfo;
-+ dentry->d_op = &aufs_dop;
-+ return 0; /* success */
-+ }
-+ cache_free_dinfo(dinfo);
-+ }
-+ TraceErr(-ENOMEM);
-+ return -ENOMEM;
-+}
-+
-+struct aufs_dinfo *dtodi(struct dentry *dentry)
-+{
-+ struct aufs_dinfo *dinfo = dentry->d_fsdata;
-+ DEBUG_ON(!dinfo
-+ || !dinfo->di_hdentry
-+ /* || stosi(dentry->d_sb)->si_bend < dinfo->di_bend */
-+ || dinfo->di_bend < dinfo->di_bstart
-+ /* dbwh can be outside of this range */
-+ || (0 <= dinfo->di_bdiropq
-+ && (dinfo->di_bdiropq < dinfo->di_bstart
-+ /* || dinfo->di_bend < dinfo->di_bdiropq */))
-+ );
-+ return dinfo;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void do_ii_write_lock(struct inode *inode, unsigned int lsc)
-+{
-+ switch (lsc) {
-+ case AuLsc_DI_CHILD:
-+ ii_write_lock_child(inode);
-+ break;
-+ case AuLsc_DI_CHILD2:
-+ ii_write_lock_child2(inode);
-+ break;
-+ case AuLsc_DI_CHILD3:
-+ ii_write_lock_child3(inode);
-+ break;
-+ case AuLsc_DI_PARENT:
-+ ii_write_lock_parent(inode);
-+ break;
-+ case AuLsc_DI_PARENT2:
-+ ii_write_lock_parent2(inode);
-+ break;
-+ case AuLsc_DI_PARENT3:
-+ ii_write_lock_parent3(inode);
-+ break;
-+ default:
-+ BUG();
-+ }
-+}
-+
-+static void do_ii_read_lock(struct inode *inode, unsigned int lsc)
-+{
-+ switch (lsc) {
-+ case AuLsc_DI_CHILD:
-+ ii_read_lock_child(inode);
-+ break;
-+ case AuLsc_DI_CHILD2:
-+ ii_read_lock_child2(inode);
-+ break;
-+ case AuLsc_DI_CHILD3:
-+ ii_read_lock_child3(inode);
-+ break;
-+ case AuLsc_DI_PARENT:
-+ ii_read_lock_parent(inode);
-+ break;
-+ case AuLsc_DI_PARENT2:
-+ ii_read_lock_parent2(inode);
-+ break;
-+ case AuLsc_DI_PARENT3:
-+ ii_read_lock_parent3(inode);
-+ break;
-+ default:
-+ BUG();
-+ }
-+}
-+
-+void di_read_lock(struct dentry *d, int flags, unsigned int lsc)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ // todo: always nested?
-+ rw_read_lock_nested(&dtodi(d)->di_rwsem, lsc);
-+ if (d->d_inode) {
-+ if (flags & AUFS_I_WLOCK)
-+ do_ii_write_lock(d->d_inode, lsc);
-+ else if (flags & AUFS_I_RLOCK)
-+ do_ii_read_lock(d->d_inode, lsc);
-+ }
-+}
-+
-+void di_read_unlock(struct dentry *d, int flags)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ if (d->d_inode) {
-+ if (flags & AUFS_I_WLOCK)
-+ ii_write_unlock(d->d_inode);
-+ else if (flags & AUFS_I_RLOCK)
-+ ii_read_unlock(d->d_inode);
-+ }
-+ rw_read_unlock(&dtodi(d)->di_rwsem);
-+}
-+
-+void di_downgrade_lock(struct dentry *d, int flags)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ rw_dgrade_lock(&dtodi(d)->di_rwsem);
-+ if (d->d_inode && (flags & AUFS_I_RLOCK))
-+ ii_downgrade_lock(d->d_inode);
-+}
-+
-+void di_write_lock(struct dentry *d, unsigned int lsc)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ // todo: always nested?
-+ rw_write_lock_nested(&dtodi(d)->di_rwsem, lsc);
-+ if (d->d_inode)
-+ do_ii_write_lock(d->d_inode, lsc);
-+}
-+
-+void di_write_unlock(struct dentry *d)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ if (d->d_inode)
-+ ii_write_unlock(d->d_inode);
-+ rw_write_unlock(&dtodi(d)->di_rwsem);
-+}
-+
-+void di_write_lock2_child(struct dentry *d1, struct dentry *d2, int isdir)
-+{
-+ struct dentry *d;
-+
-+ TraceEnter();
-+ DEBUG_ON(d1 == d2
-+ || d1->d_inode == d2->d_inode
-+ || d1->d_sb != d2->d_sb);
-+
-+ if (isdir)
-+ for (d = d1; d->d_parent != d; d = d->d_parent) // dget_parent()
-+ if (d->d_parent == d2) {
-+ di_write_lock_child(d1);
-+ di_write_lock_child2(d2);
-+ return;
-+ }
-+
-+ di_write_lock_child(d2);
-+ di_write_lock_child2(d1);
-+}
-+
-+void di_write_lock2_parent(struct dentry *d1, struct dentry *d2, int isdir)
-+{
-+ struct dentry *d;
-+
-+ TraceEnter();
-+ DEBUG_ON(d1 == d2
-+ || d1->d_inode == d2->d_inode
-+ || d1->d_sb != d2->d_sb);
-+
-+ if (isdir)
-+ for (d = d1; d->d_parent != d; d = d->d_parent) // dget_parent()
-+ if (d->d_parent == d2) {
-+ di_write_lock_parent(d1);
-+ di_write_lock_parent2(d2);
-+ return;
-+ }
-+
-+ di_write_lock_parent(d2);
-+ di_write_lock_parent2(d1);
-+}
-+
-+void di_write_unlock2(struct dentry *d1, struct dentry *d2)
-+{
-+ di_write_unlock(d1);
-+ if (d1->d_inode == d2->d_inode)
-+ rw_write_unlock(&dtodi(d2)->di_rwsem);
-+ else
-+ di_write_unlock(d2);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+aufs_bindex_t dbstart(struct dentry *dentry)
-+{
-+ DiMustAnyLock(dentry);
-+ return dtodi(dentry)->di_bstart;
-+}
-+
-+aufs_bindex_t dbend(struct dentry *dentry)
-+{
-+ DiMustAnyLock(dentry);
-+ return dtodi(dentry)->di_bend;
-+}
-+
-+aufs_bindex_t dbwh(struct dentry *dentry)
-+{
-+ DiMustAnyLock(dentry);
-+ return dtodi(dentry)->di_bwh;
-+}
-+
-+aufs_bindex_t dbdiropq(struct dentry *dentry)
-+{
-+ DiMustAnyLock(dentry);
-+ DEBUG_ON(dentry->d_inode
-+ && dentry->d_inode->i_mode
-+ && !S_ISDIR(dentry->d_inode->i_mode));
-+ return dtodi(dentry)->di_bdiropq;
-+}
-+
-+struct dentry *au_h_dptr_i(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ struct dentry *d;
-+
-+ DiMustAnyLock(dentry);
-+ if (dbstart(dentry) < 0 || bindex < dbstart(dentry))
-+ return NULL;
-+ DEBUG_ON(bindex < 0
-+ /* || bindex > sbend(dentry->d_sb) */);
-+ d = dtodi(dentry)->di_hdentry[0 + bindex].hd_dentry;
-+ DEBUG_ON(d && (atomic_read(&d->d_count) <= 0));
-+ return d;
-+}
-+
-+struct dentry *au_h_dptr(struct dentry *dentry)
-+{
-+ return au_h_dptr_i(dentry, dbstart(dentry));
-+}
-+
-+aufs_bindex_t dbtail(struct dentry *dentry)
-+{
-+ aufs_bindex_t bend, bwh;
-+
-+ bend = dbend(dentry);
-+ if (0 <= bend) {
-+ bwh = dbwh(dentry);
-+ //DEBUG_ON(bend < bwh);
-+ if (!bwh)
-+ return bwh;
-+ if (0 < bwh && bwh < bend)
-+ return bwh - 1;
-+ }
-+ return bend;
-+}
-+
-+aufs_bindex_t dbtaildir(struct dentry *dentry)
-+{
-+ aufs_bindex_t bend, bopq;
-+
-+ DEBUG_ON(dentry->d_inode
-+ && dentry->d_inode->i_mode
-+ && !S_ISDIR(dentry->d_inode->i_mode));
-+
-+ bend = dbtail(dentry);
-+ if (0 <= bend) {
-+ bopq = dbdiropq(dentry);
-+ DEBUG_ON(bend < bopq);
-+ if (0 <= bopq && bopq < bend)
-+ bend = bopq;
-+ }
-+ return bend;
-+}
-+
-+aufs_bindex_t dbtail_generic(struct dentry *dentry)
-+{
-+ struct inode *inode;
-+
-+ inode = dentry->d_inode;
-+ if (inode && S_ISDIR(inode->i_mode))
-+ return dbtaildir(dentry);
-+ else
-+ return dbtail(dentry);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+// hard/soft set
-+void set_dbstart(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(sbend(dentry->d_sb) < bindex);
-+ /* */
-+ dtodi(dentry)->di_bstart = bindex;
-+}
-+
-+void set_dbend(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(sbend(dentry->d_sb) < bindex
-+ || bindex < dbstart(dentry));
-+ dtodi(dentry)->di_bend = bindex;
-+}
-+
-+void set_dbwh(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(sbend(dentry->d_sb) < bindex);
-+ /* dbwh can be outside of bstart - bend range */
-+ dtodi(dentry)->di_bwh = bindex;
-+}
-+
-+void set_dbdiropq(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(sbend(dentry->d_sb) < bindex);
-+ DEBUG_ON((bindex != -1
-+ && (bindex < dbstart(dentry) || dbend(dentry) < bindex))
-+ || (dentry->d_inode
-+ && dentry->d_inode->i_mode
-+ && !S_ISDIR(dentry->d_inode->i_mode)));
-+ dtodi(dentry)->di_bdiropq = bindex;
-+}
-+
-+void hdput(struct aufs_hdentry *hd)
-+{
-+ dput(hd->hd_dentry);
-+}
-+
-+void set_h_dptr(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct dentry *h_dentry)
-+{
-+ struct aufs_hdentry *hd = dtodi(dentry)->di_hdentry + bindex;
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(bindex < dtodi(dentry)->di_bstart
-+ || bindex > dtodi(dentry)->di_bend
-+ || (h_dentry && atomic_read(&h_dentry->d_count) <= 0)
-+ || (h_dentry && hd->hd_dentry)
-+ );
-+ if (hd->hd_dentry)
-+ hdput(hd);
-+ hd->hd_dentry = h_dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void au_update_digen(struct dentry *dentry)
-+{
-+ //DiMustWriteLock(dentry);
-+ DEBUG_ON(!dentry->d_sb);
-+ atomic_set(&dtodi(dentry)->di_generation, au_sigen(dentry->d_sb));
-+}
-+
-+void au_update_dbstart(struct dentry *dentry)
-+{
-+ aufs_bindex_t bindex, bstart = dbstart(dentry), bend = dbend(dentry);
-+ struct dentry *hidden_dentry;
-+
-+ DiMustWriteLock(dentry);
-+ for (bindex = bstart; bindex <= bend; bindex++) {
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!hidden_dentry)
-+ continue;
-+ if (hidden_dentry->d_inode) {
-+ set_dbstart(dentry, bindex);
-+ return;
-+ }
-+ set_h_dptr(dentry, bindex, NULL);
-+ }
-+ //set_dbstart(dentry, -1);
-+ //set_dbend(dentry, -1);
-+}
-+
-+int au_find_dbindex(struct dentry *dentry, struct dentry *hidden_dentry)
-+{
-+ aufs_bindex_t bindex, bend;
-+
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); bindex <= bend; bindex++)
-+ if (au_h_dptr_i(dentry, bindex) == hidden_dentry)
-+ return bindex;
-+ return -1;
-+}
-diff --git a/fs/aufs/dir.c b/fs/aufs/dir.c
-new file mode 100755
-index 0000000..9afb1a9
---- /dev/null
-+++ b/fs/aufs/dir.c
-@@ -0,0 +1,564 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dir.c,v 1.36 2007/05/14 03:38:52 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+static int reopen_dir(struct file *file)
-+{
-+ int err;
-+ struct dentry *dentry, *hidden_dentry;
-+ aufs_bindex_t bindex, btail, bstart;
-+ struct file *hidden_file;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(!S_ISDIR(dentry->d_inode->i_mode));
-+
-+ /* open all hidden dirs */
-+ bstart = dbstart(dentry);
-+#if 1
-+ for (bindex = fbstart(file); bindex < bstart; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+#endif
-+ set_fbstart(file, bstart);
-+ btail = dbtaildir(dentry);
-+#if 1
-+ for (bindex = fbend(file); btail < bindex; bindex--)
-+ set_h_fptr(file, bindex, NULL);
-+#endif
-+ set_fbend(file, btail);
-+ for (bindex = bstart; bindex <= btail; bindex++) {
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!hidden_dentry)
-+ continue;
-+ hidden_file = au_h_fptr_i(file, bindex);
-+ if (hidden_file) {
-+ DEBUG_ON(hidden_file->f_dentry != hidden_dentry);
-+ continue;
-+ }
-+
-+ hidden_file = hidden_open(dentry, bindex, file->f_flags);
-+ // unavailable
-+ //if (LktrCond) {fput(hidden_file);
-+ //br_put(stobr(dentry->d_sb, bindex));hidden_file=ERR_PTR(-1);}
-+ err = PTR_ERR(hidden_file);
-+ if (IS_ERR(hidden_file))
-+ goto out; // close all?
-+ //cpup_file_flags(hidden_file, file);
-+ set_h_fptr(file, bindex, hidden_file);
-+ }
-+ err = 0;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int do_open_dir(struct file *file, int flags)
-+{
-+ int err;
-+ aufs_bindex_t bindex, btail;
-+ struct dentry *dentry, *hidden_dentry;
-+ struct file *hidden_file;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, 0x%x\n", DLNPair(dentry), flags);
-+ DEBUG_ON(!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode));
-+
-+ err = 0;
-+ set_fvdir_cache(file, NULL);
-+ file->f_version = dentry->d_inode->i_version;
-+ bindex = dbstart(dentry);
-+ set_fbstart(file, bindex);
-+ btail = dbtaildir(dentry);
-+ set_fbend(file, btail);
-+ for (; !err && bindex <= btail; bindex++) {
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!hidden_dentry)
-+ continue;
-+
-+ hidden_file = hidden_open(dentry, bindex, flags);
-+ //if (LktrCond) {fput(hidden_file);
-+ //br_put(stobr(dentry->d_sb, bindex));hidden_file=ERR_PTR(-1);}
-+ if (!IS_ERR(hidden_file)) {
-+ set_h_fptr(file, bindex, hidden_file);
-+ continue;
-+ }
-+ err = PTR_ERR(hidden_file);
-+ }
-+ if (!err)
-+ return 0; /* success */
-+
-+ /* close all */
-+ for (bindex = fbstart(file); !err && bindex <= btail; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+ set_fbstart(file, -1);
-+ set_fbend(file, -1);
-+ return err;
-+}
-+
-+static int aufs_open_dir(struct inode *inode, struct file *file)
-+{
-+ return au_do_open(inode, file, do_open_dir);
-+}
-+
-+static int aufs_release_dir(struct inode *inode, struct file *file)
-+{
-+ struct aufs_vdir *vdir_cache;
-+ struct super_block *sb;
-+
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(file->f_dentry));
-+
-+ sb = file->f_dentry->d_sb;
-+ si_read_lock(sb);
-+ fi_write_lock(file);
-+ vdir_cache = fvdir_cache(file);
-+ if (vdir_cache)
-+ free_vdir(vdir_cache);
-+ fi_write_unlock(file);
-+ au_fin_finfo(file);
-+ si_read_unlock(sb);
-+ return 0;
-+}
-+
-+static int fsync_dir(struct dentry *dentry, int datasync)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct super_block *sb;
-+ aufs_bindex_t bend, bindex;
-+
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), datasync);
-+ DiMustAnyLock(dentry);
-+ sb = dentry->d_sb;
-+ SiMustAnyLock(sb);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+ IiMustAnyLock(inode);
-+
-+ err = 0;
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); !err && bindex <= bend; bindex++) {
-+ struct dentry *h_dentry;
-+ struct inode *h_inode;
-+ struct file_operations *fop;
-+
-+ if (test_ro(sb, bindex, inode))
-+ continue;
-+ h_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!h_dentry)
-+ continue;
-+ h_inode = h_dentry->d_inode;
-+ if (!h_inode)
-+ continue;
-+
-+ /* cf. fs/nsfd/vfs.c and fs/nfsd/nfs4recover.c */
-+ //hdir_lock(h_inode, inode, bindex);
-+ i_lock(h_inode);
-+ fop = (void*)h_inode->i_fop;
-+ err = filemap_fdatawrite(h_inode->i_mapping);
-+ if (!err && fop && fop->fsync)
-+ err = fop->fsync(NULL, h_dentry, datasync);
-+ if (!err)
-+ err = filemap_fdatawrite(h_inode->i_mapping);
-+ //hdir_unlock(h_inode, inode, bindex);
-+ i_unlock(h_inode);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * @file may be NULL
-+ */
-+static int aufs_fsync_dir(struct file *file, struct dentry *dentry,
-+ int datasync)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct file *hidden_file;
-+ struct super_block *sb;
-+ aufs_bindex_t bend, bindex;
-+
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), datasync);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+
-+ err = 0;
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ if (file) {
-+ err = au_reval_and_lock_finfo(file, reopen_dir, /*wlock*/1,
-+ /*locked*/1);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+ } else
-+ di_read_lock_child(dentry, !AUFS_I_WLOCK);
-+
-+ ii_write_lock_child(inode);
-+ if (file) {
-+ bend = fbend(file);
-+ for (bindex = fbstart(file); !err && bindex <= bend; bindex++) {
-+ hidden_file = au_h_fptr_i(file, bindex);
-+ if (!hidden_file || test_ro(sb, bindex, inode))
-+ continue;
-+
-+ err = -EINVAL;
-+ if (hidden_file->f_op && hidden_file->f_op->fsync) {
-+ // todo: try do_fsync() in fs/sync.c
-+#if 0
-+ DEBUG_ON(hidden_file->f_dentry->d_inode
-+ != au_h_iptr_i(inode, bindex));
-+ hdir_lock(hidden_file->f_dentry->d_inode, inode,
-+ bindex);
-+#else
-+ i_lock(hidden_file->f_dentry->d_inode);
-+#endif
-+ err = hidden_file->f_op->fsync
-+ (hidden_file, hidden_file->f_dentry,
-+ datasync);
-+ //err = -1;
-+#if 0
-+ hdir_unlock(hidden_file->f_dentry->d_inode,
-+ inode, bindex);
-+#else
-+ i_unlock(hidden_file->f_dentry->d_inode);
-+#endif
-+ }
-+ }
-+ } else
-+ err = fsync_dir(dentry, datasync);
-+ au_cpup_attr_timesizes(inode);
-+ ii_write_unlock(inode);
-+ if (file)
-+ fi_write_unlock(file);
-+ else
-+ di_read_unlock(dentry, !AUFS_I_WLOCK);
-+
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int aufs_readdir(struct file *file, void *dirent, filldir_t filldir)
-+{
-+ int err;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld\n", DLNPair(dentry), file->f_pos);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+
-+ au_nfsd_lockdep_off();
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, reopen_dir, /*wlock*/1,
-+ /*locked*/1);
-+ if (unlikely(err))
-+ goto out;
-+
-+ ii_write_lock_child(inode);
-+ err = au_init_vdir(file);
-+ if (unlikely(err)) {
-+ ii_write_unlock(inode);
-+ goto out_unlock;
-+ }
-+ //DbgVdir(fvdir_cache(file));// goto out_unlock;
-+
-+ /* nfsd filldir calls lookup_one_len(). */
-+ ii_downgrade_lock(inode);
-+ err = au_fill_de(file, dirent, filldir);
-+ //DbgVdir(fvdir_cache(file));// goto out_unlock;
-+
-+ inode->i_atime = au_h_iptr(inode)->i_atime;
-+ ii_read_unlock(inode);
-+
-+ out_unlock:
-+ fi_write_unlock(file);
-+ out:
-+ si_read_unlock(sb);
-+ au_nfsd_lockdep_on();
-+#if 0 // debug
-+ if (LktrCond)
-+ igrab(inode);
-+#endif
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct test_empty_arg {
-+ struct aufs_nhash *whlist;
-+ int whonly;
-+ aufs_bindex_t bindex;
-+ int err, called;
-+};
-+
-+static int test_empty_cb(void *__arg, const char *__name, int namelen,
-+ loff_t offset, filldir_ino_t ino, unsigned int d_type)
-+{
-+ struct test_empty_arg *arg = __arg;
-+ char *name = (void*)__name;
-+
-+ LKTRTrace("%.*s\n", namelen, name);
-+
-+ arg->err = 0;
-+ arg->called++;
-+ //smp_mb();
-+ if (name[0] == '.'
-+ && (namelen == 1 || (name[1] == '.' && namelen == 2)))
-+ return 0; /* success */
-+
-+ if (namelen <= AUFS_WH_PFX_LEN
-+ || memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) {
-+ if (arg->whonly && !test_known_wh(arg->whlist, name, namelen))
-+ arg->err = -ENOTEMPTY;
-+ goto out;
-+ }
-+
-+ name += AUFS_WH_PFX_LEN;
-+ namelen -= AUFS_WH_PFX_LEN;
-+ if (!test_known_wh(arg->whlist, name, namelen))
-+ arg->err = append_wh(arg->whlist, name, namelen, arg->bindex);
-+
-+ out:
-+ //smp_mb();
-+ TraceErr(arg->err);
-+ return arg->err;
-+}
-+
-+static int do_test_empty(struct dentry *dentry, struct test_empty_arg *arg)
-+{
-+ int err, dlgt;
-+ struct file *hidden_file;
-+
-+ LKTRTrace("%.*s, {%p, %d, %d}\n",
-+ DLNPair(dentry), arg->whlist, arg->whonly, arg->bindex);
-+
-+ hidden_file = hidden_open(dentry, arg->bindex,
-+ O_RDONLY | O_NONBLOCK | O_DIRECTORY
-+ | O_LARGEFILE);
-+ err = PTR_ERR(hidden_file);
-+ if (IS_ERR(hidden_file))
-+ goto out;
-+
-+ dlgt = need_dlgt(dentry->d_sb);
-+ //hidden_file->f_pos = 0;
-+ do {
-+ arg->err = 0;
-+ arg->called = 0;
-+ //smp_mb();
-+ err = vfsub_readdir(hidden_file, test_empty_cb, arg, dlgt);
-+ if (err >= 0)
-+ err = arg->err;
-+ } while (!err && arg->called);
-+ fput(hidden_file);
-+ sbr_put(dentry->d_sb, arg->bindex);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct do_test_empty_args {
-+ int *errp;
-+ struct dentry *dentry;
-+ struct test_empty_arg *arg;
-+};
-+
-+static void call_do_test_empty(void *args)
-+{
-+ struct do_test_empty_args *a = args;
-+ *a->errp = do_test_empty(a->dentry, a->arg);
-+}
-+
-+static int sio_test_empty(struct dentry *dentry, struct test_empty_arg *arg)
-+{
-+ int err;
-+ struct dentry *hidden_dentry;
-+ struct inode *hidden_inode;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ hidden_dentry = au_h_dptr_i(dentry, arg->bindex);
-+ DEBUG_ON(!hidden_dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode || !S_ISDIR(hidden_inode->i_mode));
-+
-+ hi_lock_child(hidden_inode);
-+ err = au_test_perm(hidden_inode, MAY_EXEC | MAY_READ,
-+ need_dlgt(dentry->d_sb));
-+ i_unlock(hidden_inode);
-+ if (!err)
-+ err = do_test_empty(dentry, arg);
-+ else {
-+ struct do_test_empty_args args = {
-+ .errp = &err,
-+ .dentry = dentry,
-+ .arg = arg
-+ };
-+ au_wkq_wait(call_do_test_empty, &args, /*dlgt*/0);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_test_empty_lower(struct dentry *dentry)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct test_empty_arg arg;
-+ struct aufs_nhash *whlist;
-+ aufs_bindex_t bindex, bstart, btail;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode || !S_ISDIR(inode->i_mode));
-+
-+ whlist = nhash_new(GFP_KERNEL);
-+ err = PTR_ERR(whlist);
-+ if (IS_ERR(whlist))
-+ goto out;
-+
-+ bstart = dbstart(dentry);
-+ arg.whlist = whlist;
-+ arg.whonly = 0;
-+ arg.bindex = bstart;
-+ err = do_test_empty(dentry, &arg);
-+ if (unlikely(err))
-+ goto out_whlist;
-+
-+ arg.whonly = 1;
-+ btail = dbtaildir(dentry);
-+ for (bindex = bstart + 1; !err && bindex <= btail; bindex++) {
-+ struct dentry *hidden_dentry;
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (hidden_dentry && hidden_dentry->d_inode) {
-+ DEBUG_ON(!S_ISDIR(hidden_dentry->d_inode->i_mode));
-+ arg.bindex = bindex;
-+ err = do_test_empty(dentry, &arg);
-+ }
-+ }
-+
-+ out_whlist:
-+ nhash_del(whlist);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int test_empty(struct dentry *dentry, struct aufs_nhash *whlist)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct test_empty_arg arg;
-+ aufs_bindex_t bindex, btail;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode || !S_ISDIR(inode->i_mode));
-+
-+ err = 0;
-+ arg.whlist = whlist;
-+ arg.whonly = 1;
-+ btail = dbtaildir(dentry);
-+ for (bindex = dbstart(dentry); !err && bindex <= btail; bindex++) {
-+ struct dentry *hidden_dentry;
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (hidden_dentry && hidden_dentry->d_inode) {
-+ DEBUG_ON(!S_ISDIR(hidden_dentry->d_inode->i_mode));
-+ arg.bindex = bindex;
-+ err = sio_test_empty(dentry, &arg);
-+ }
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void au_add_nlink(struct inode *dir, struct inode *h_dir)
-+{
-+ DEBUG_ON(!S_ISDIR(dir->i_mode) || !S_ISDIR(h_dir->i_mode));
-+ dir->i_nlink += h_dir->i_nlink - 2;
-+ if (unlikely(h_dir->i_nlink < 2))
-+ dir->i_nlink += 2;
-+}
-+
-+void au_sub_nlink(struct inode *dir, struct inode *h_dir)
-+{
-+ DEBUG_ON(!S_ISDIR(dir->i_mode) || !S_ISDIR(h_dir->i_mode));
-+ dir->i_nlink -= h_dir->i_nlink - 2;
-+ if (unlikely(h_dir->i_nlink < 2))
-+ dir->i_nlink -= 2;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if 0 // comment
-+struct file_operations {
-+ struct module *owner;
-+ loff_t (*llseek) (struct file *, loff_t, int);
-+ ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
-+ ssize_t (*aio_read) (struct kiocb *, char __user *, size_t, loff_t);
-+ ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
-+ ssize_t (*aio_write) (struct kiocb *, const char __user *, size_t, loff_t);
-+ int (*readdir) (struct file *, void *, filldir_t);
-+ unsigned int (*poll) (struct file *, struct poll_table_struct *);
-+ int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
-+ long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
-+ long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
-+ int (*mmap) (struct file *, struct vm_area_struct *);
-+ int (*open) (struct inode *, struct file *);
-+ int (*flush) (struct file *);
-+ int (*release) (struct inode *, struct file *);
-+ int (*fsync) (struct file *, struct dentry *, int datasync);
-+ int (*aio_fsync) (struct kiocb *, int datasync);
-+ int (*fasync) (int, struct file *, int);
-+ int (*lock) (struct file *, int, struct file_lock *);
-+ ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
-+ ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
-+ ssize_t (*sendfile) (struct file *, loff_t *, size_t, read_actor_t, void *);
-+ ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
-+ unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
-+ int (*check_flags)(int);
-+ int (*dir_notify)(struct file *file, unsigned long arg);
-+ int (*flock) (struct file *, int, struct file_lock *);
-+};
-+#endif
-+
-+struct file_operations aufs_dir_fop = {
-+ .read = generic_read_dir,
-+ .readdir = aufs_readdir,
-+ .open = aufs_open_dir,
-+ .release = aufs_release_dir,
-+ .flush = aufs_flush,
-+ .fsync = aufs_fsync_dir,
-+};
-diff --git a/fs/aufs/dir.h b/fs/aufs/dir.h
-new file mode 100755
-index 0000000..3ddf309
---- /dev/null
-+++ b/fs/aufs/dir.h
-@@ -0,0 +1,125 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dir.h,v 1.18 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_DIR_H__
-+#define __AUFS_DIR_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
-+#define filldir_ino_t u64
-+#else
-+#define filldir_ino_t ino_t
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* need to be faster and smaller */
-+
-+#define AUFS_DEBLK_SIZE 512 // todo: changable
-+#define AUFS_NHASH_SIZE 32 // todo: changable
-+#if AUFS_DEBLK_SIZE < NAME_MAX || PAGE_SIZE < AUFS_DEBLK_SIZE
-+#error invalid size AUFS_DEBLK_SIZE
-+#endif
-+
-+typedef char aufs_deblk_t[AUFS_DEBLK_SIZE];
-+
-+struct aufs_nhash {
-+ struct hlist_head heads[AUFS_NHASH_SIZE];
-+};
-+
-+struct aufs_destr {
-+ unsigned char len;
-+ char name[0];
-+} __attribute__ ((packed));
-+
-+struct aufs_dehstr {
-+ struct hlist_node hash;
-+ struct aufs_destr *str;
-+};
-+
-+struct aufs_de {
-+ ino_t de_ino;
-+ unsigned char de_type;
-+ //caution: packed
-+ struct aufs_destr de_str;
-+} __attribute__ ((packed));
-+
-+struct aufs_wh {
-+ struct hlist_node wh_hash;
-+ aufs_bindex_t wh_bindex;
-+ struct aufs_destr wh_str;
-+} __attribute__ ((packed));
-+
-+union aufs_deblk_p {
-+ unsigned char *p;
-+ aufs_deblk_t *deblk;
-+ struct aufs_de *de;
-+};
-+
-+struct aufs_vdir {
-+ aufs_deblk_t **vd_deblk;
-+ int vd_nblk;
-+ struct {
-+ int i;
-+ union aufs_deblk_p p;
-+ } vd_last;
-+
-+ unsigned long vd_version;
-+ unsigned long vd_jiffy;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* dir.c */
-+extern struct file_operations aufs_dir_fop;
-+int au_test_empty_lower(struct dentry *dentry);
-+int test_empty(struct dentry *dentry, struct aufs_nhash *whlist);
-+void au_add_nlink(struct inode *dir, struct inode *h_dir);
-+void au_sub_nlink(struct inode *dir, struct inode *h_dir);
-+
-+/* vdir.c */
-+struct aufs_nhash *nhash_new(gfp_t gfp);
-+void nhash_del(struct aufs_nhash *nhash);
-+void nhash_init(struct aufs_nhash *nhash);
-+void nhash_move(struct aufs_nhash *dst, struct aufs_nhash *src);
-+void nhash_fin(struct aufs_nhash *nhash);
-+int is_longer_wh(struct aufs_nhash *whlist, aufs_bindex_t btgt, int limit);
-+int test_known_wh(struct aufs_nhash *whlist, char *name, int namelen);
-+int append_wh(struct aufs_nhash *whlist, char *name, int namelen,
-+ aufs_bindex_t bindex);
-+void free_vdir(struct aufs_vdir *vdir);
-+int au_init_vdir(struct file *file);
-+int au_fill_de(struct file *file, void *dirent, filldir_t filldir);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+unsigned int au_name_hash(const unsigned char *name, unsigned int len)
-+{
-+ return (full_name_hash(name, len) % AUFS_NHASH_SIZE);
-+}
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_DIR_H__ */
-diff --git a/fs/aufs/export.c b/fs/aufs/export.c
-new file mode 100755
-index 0000000..7b1c6ac
---- /dev/null
-+++ b/fs/aufs/export.c
-@@ -0,0 +1,585 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: export.c,v 1.7 2007/05/14 03:38:24 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+extern struct export_operations export_op_default;
-+#define CALL(ops, func) (((ops)->func) ? ((ops)->func) : export_op_default.func)
-+#define is_anon(d) ((d)->d_flags & DCACHE_DISCONNECTED)
-+
-+union conv {
-+#if BITS_PER_LONG == 32
-+ __u32 a[1];
-+#else
-+ __u32 a[2];
-+#endif
-+ ino_t ino;
-+};
-+
-+static ino_t decode_ino(__u32 *a)
-+{
-+ union conv u;
-+ u.a[0] = a[0];
-+#if BITS_PER_LONG == 64
-+ u.a[1] = a[1];
-+#endif
-+ return u.ino;
-+}
-+
-+static void encode_ino(__u32 *a, ino_t ino)
-+{
-+ union conv u;
-+ u.ino = ino;
-+ a[0] = u.a[0];
-+#if BITS_PER_LONG == 64
-+ a[1] = u.a[1];
-+#endif
-+}
-+
-+static void decode_br_id_sigen(__u32 a, aufs_bindex_t *br_id,
-+ aufs_bindex_t *sigen)
-+{
-+ BUILD_BUG_ON((sizeof(*br_id) + sizeof(*sigen)) > sizeof(a));
-+ *br_id = a >> 16;
-+ DEBUG_ON(*br_id < 0);
-+ *sigen = a;
-+ DEBUG_ON(*sigen < 0);
-+}
-+
-+static __u32 encode_br_id_sigen(aufs_bindex_t br_id, aufs_bindex_t sigen)
-+{
-+ DEBUG_ON(br_id < 0 || sigen < 0);
-+ return (br_id << 16) | sigen;
-+}
-+
-+/* NFS file handle */
-+enum {
-+ /* support 64bit inode number */
-+ /* but untested */
-+ Fh_br_id_sigen,
-+ Fh_ino1,
-+#if BITS_PER_LONG == 64
-+ Fh_ino2,
-+#endif
-+ Fh_dir_ino1,
-+#if BITS_PER_LONG == 64
-+ Fh_dir_ino2,
-+#endif
-+ Fh_h_ino1,
-+#if BITS_PER_LONG == 64
-+ Fh_h_ino2,
-+#endif
-+ Fh_h_igen,
-+ Fh_h_type,
-+ Fh_tail,
-+
-+ Fh_ino = Fh_ino1,
-+ Fh_dir_ino = Fh_dir_ino1,
-+ Fh_h_ino = Fh_h_ino1,
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static struct dentry *decode_by_ino(struct super_block *sb, ino_t ino,
-+ ino_t dir_ino)
-+{
-+ struct dentry *dentry;
-+ struct inode *inode;
-+
-+ LKTRTrace("i%lu, diri%lu\n", ino, dir_ino);
-+
-+ dentry = NULL;
-+ inode = ilookup(sb, ino);
-+ if (unlikely(!inode))
-+ goto out;
-+
-+ dentry = ERR_PTR(-ESTALE);
-+ if (unlikely(is_bad_inode(inode)))
-+ goto out_iput;
-+
-+ dentry = NULL;
-+ if (!S_ISDIR(inode->i_mode)) {
-+ struct dentry *d;
-+ spin_lock(&dcache_lock);
-+ list_for_each_entry(d, &inode->i_dentry, d_alias)
-+ if (!is_anon(d)
-+ && d->d_parent->d_inode->i_ino == dir_ino) {
-+ dentry = dget_locked(d);
-+ break;
-+ }
-+ spin_unlock(&dcache_lock);
-+ } else {
-+ dentry = d_find_alias(inode);
-+ if (dentry
-+ && !is_anon(dentry)
-+ && dentry->d_parent->d_inode->i_ino == dir_ino)
-+ goto out_iput; /* success */
-+
-+ dput(dentry);
-+ dentry = NULL;
-+ }
-+
-+ out_iput:
-+ iput(inode);
-+ out:
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct find_name_by_ino {
-+ int called, found;
-+ ino_t ino;
-+ char *name;
-+ int namelen;
-+};
-+
-+static int
-+find_name_by_ino(void *arg, const char *name, int namelen, loff_t offset,
-+ filldir_ino_t ino, unsigned int d_type)
-+{
-+ struct find_name_by_ino *a = arg;
-+
-+ a->called++;
-+ if (a->ino != ino)
-+ return 0;
-+
-+ memcpy(a->name, name, namelen);
-+ a->namelen = namelen;
-+ a->found = 1;
-+ return 1;
-+}
-+
-+static struct dentry *decode_by_dir_ino(struct super_block *sb, ino_t ino,
-+ ino_t dir_ino)
-+{
-+ struct dentry *dentry, *parent;
-+ struct inode *dir;
-+ struct find_name_by_ino arg;
-+ struct file *file;
-+ int err;
-+
-+ LKTRTrace("i%lu, diri%lu\n", ino, dir_ino);
-+
-+ dentry = NULL;
-+ dir = ilookup(sb, dir_ino);
-+ if (unlikely(!dir))
-+ goto out;
-+
-+ dentry = ERR_PTR(-ESTALE);
-+ if (unlikely(is_bad_inode(dir)))
-+ goto out_iput;
-+
-+ dentry = NULL;
-+ parent = d_find_alias(dir);
-+ if (parent) {
-+ if (unlikely(is_anon(parent))) {
-+ dput(parent);
-+ goto out_iput;
-+ }
-+ } else
-+ goto out_iput;
-+
-+ file = dentry_open(parent, NULL, au_dir_roflags);
-+ dentry = (void*)file;
-+ if (IS_ERR(file))
-+ goto out_iput;
-+
-+ dentry = ERR_PTR(-ENOMEM);
-+ arg.name = __getname();
-+ if (unlikely(!arg.name))
-+ goto out_fput;
-+ arg.ino = ino;
-+ arg.found = 0;
-+
-+ do {
-+ arg.called = 0;
-+ //smp_mb();
-+ err = vfsub_readdir(file, find_name_by_ino, &arg, /*dlgt*/0);
-+ } while (!err && !arg.found && arg.called);
-+ dentry = ERR_PTR(err);
-+ if (arg.found) {
-+ /* do not call lkup_one(), nor dlgt */
-+ i_lock(dir);
-+ dentry = lookup_one_len(arg.name, parent, arg.namelen);
-+ i_unlock(dir);
-+ TraceErrPtr(dentry);
-+ }
-+
-+ //out_putname:
-+ __putname(arg.name);
-+ out_fput:
-+ fput(file);
-+ out_iput:
-+ iput(dir);
-+ out:
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct append_name {
-+ int found, called, len;
-+ char *h_path;
-+ ino_t h_ino;
-+};
-+
-+static int append_name(void *arg, const char *name, int len, loff_t pos,
-+ filldir_ino_t ino, unsigned int d_type)
-+{
-+ struct append_name *a = arg;
-+ char *p;
-+
-+ a->called++;
-+ if (ino != a->h_ino)
-+ return 0;
-+
-+ DEBUG_ON(len == 1 && *name == '.');
-+ DEBUG_ON(len == 2 && name[0] == '.' && name[1] == '.');
-+ a->len = strlen(a->h_path);
-+ memmove(a->h_path - a->len - 1, a->h_path, a->len);
-+ a->h_path -= a->len + 1;
-+ p = a->h_path + a->len;
-+ *p++ = '/';
-+ memcpy(p, name, a->len);
-+ a->len += 1 + len;
-+ a->found++;
-+ return 1;
-+}
-+
-+static int h_acceptable(void *expv, struct dentry *dentry)
-+{
-+ return 1;
-+}
-+
-+static struct dentry*
-+decode_by_path(struct super_block *sb, aufs_bindex_t bindex, __u32 *fh,
-+ int fh_len, void *context)
-+{
-+ struct dentry *dentry, *h_parent, *root, *h_root;
-+ struct super_block *h_sb;
-+ char *path, *p;
-+ struct vfsmount *h_mnt;
-+ struct append_name arg;
-+ int len, err;
-+ struct file *h_file;
-+ struct nameidata nd;
-+ struct aufs_branch *br;
-+
-+ LKTRTrace("b%d\n", bindex);
-+ SiMustAnyLock(sb);
-+
-+ br = stobr(sb, bindex);
-+ //br_get(br);
-+ h_mnt = br->br_mnt;
-+ h_sb = h_mnt->mnt_sb;
-+ LKTRTrace("%s, h_decode_fh\n", au_sbtype(h_sb));
-+ h_parent = CALL(h_sb->s_export_op, decode_fh)
-+ (h_sb, fh + Fh_tail, fh_len - Fh_tail, fh[Fh_h_type],
-+ h_acceptable, /*context*/NULL);
-+ dentry = h_parent;
-+ if (unlikely(!h_parent || IS_ERR(h_parent))) {
-+ Warn1("%s decode_fh failed\n", au_sbtype(h_sb));
-+ goto out;
-+ }
-+ dentry = NULL;
-+ if (unlikely(is_anon(h_parent))) {
-+ Warn1("%s decode_fh returned a disconnected dentry\n",
-+ au_sbtype(h_sb));
-+ dput(h_parent);
-+ goto out;
-+ }
-+
-+ dentry = ERR_PTR(-ENOMEM);
-+ path = __getname();
-+ if (unlikely(!path)) {
-+ dput(h_parent);
-+ goto out;
-+ }
-+
-+ root = sb->s_root;
-+ di_read_lock_parent(root, !AUFS_I_RLOCK);
-+ h_root = au_h_dptr_i(root, bindex);
-+ di_read_unlock(root, !AUFS_I_RLOCK);
-+ arg.h_path = d_path(h_root, h_mnt, path, PATH_MAX);
-+ dentry = (void*)arg.h_path;
-+ if (unlikely(!arg.h_path || IS_ERR(arg.h_path)))
-+ goto out_putname;
-+ len = strlen(arg.h_path);
-+ arg.h_path = d_path(h_parent, h_mnt, path, PATH_MAX);
-+ dentry = (void*)arg.h_path;
-+ if (unlikely(!arg.h_path || IS_ERR(arg.h_path)))
-+ goto out_putname;
-+ LKTRTrace("%s\n", arg.h_path);
-+ if (len != 1)
-+ arg.h_path += len;
-+ LKTRTrace("%s\n", arg.h_path);
-+
-+ /* cf. fs/exportfs/expfs.c */
-+ h_file = dentry_open(h_parent, NULL, au_dir_roflags);
-+ dentry = (void*)h_file;
-+ if (IS_ERR(h_file))
-+ goto out_putname;
-+
-+ arg.found = 0;
-+ arg.h_ino = decode_ino(fh + Fh_h_ino);
-+ do {
-+ arg.called = 0;
-+ err = vfsub_readdir(h_file, append_name, &arg, /*dlgt*/0);
-+ } while (!err && !arg.found && arg.called);
-+ LKTRTrace("%s, %d\n", arg.h_path, arg.len);
-+
-+ p = d_path(root, stosi(sb)->si_mnt, path, PATH_MAX - arg.len - 2);
-+ dentry = (void*)p;
-+ if (unlikely(!p || IS_ERR(p)))
-+ goto out_fput;
-+ p[strlen(p)] = '/';
-+ LKTRTrace("%s\n", p);
-+
-+ err = path_lookup(p, LOOKUP_FOLLOW, &nd);
-+ dentry = ERR_PTR(err);
-+ if (!err) {
-+ dentry = dget(nd.dentry);
-+ if (unlikely(is_anon(dentry))) {
-+ dput(dentry);
-+ dentry = ERR_PTR(-ESTALE);
-+ }
-+ path_release(&nd);
-+ }
-+
-+ out_fput:
-+ fput(h_file);
-+ out_putname:
-+ __putname(path);
-+ out:
-+ //br_put(br);
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static struct dentry*
-+aufs_decode_fh(struct super_block *sb, __u32 *fh, int fh_len, int fh_type,
-+ int (*acceptable)(void *context, struct dentry *de),
-+ void *context)
-+{
-+ struct dentry *dentry;
-+ ino_t ino, dir_ino;
-+ aufs_bindex_t bindex, br_id, sigen_v;
-+ struct inode *inode, *h_inode;
-+
-+ //au_debug_on();
-+ LKTRTrace("%d, fh{i%u, br_id_sigen 0x%x, hi%u}\n",
-+ fh_type, fh[Fh_ino], fh[Fh_br_id_sigen], fh[Fh_h_ino]);
-+ DEBUG_ON(fh_len < Fh_tail);
-+
-+ si_read_lock(sb);
-+ lockdep_off();
-+
-+ /* branch id may be wrapped around */
-+ dentry = ERR_PTR(-ESTALE);
-+ decode_br_id_sigen(fh[Fh_br_id_sigen], &br_id, &sigen_v);
-+ bindex = find_brindex(sb, br_id);
-+ if (unlikely(bindex < 0 || au_sigen(sb) < sigen_v))
-+ goto out;
-+
-+ /* is this inode still cached? */
-+ ino = decode_ino(fh + Fh_ino);
-+ dir_ino = decode_ino(fh + Fh_dir_ino);
-+ dentry = decode_by_ino(sb, ino, dir_ino);
-+ if (IS_ERR(dentry))
-+ goto out;
-+ if (dentry)
-+ goto accept;
-+
-+ /* is the parent dir cached? */
-+ dentry = decode_by_dir_ino(sb, ino, dir_ino);
-+ if (IS_ERR(dentry))
-+ goto out;
-+ if (dentry)
-+ goto accept;
-+
-+ /* lookup path */
-+ dentry = decode_by_path(sb, bindex, fh, fh_len, context);
-+ if (IS_ERR(dentry))
-+ goto out;
-+ if (unlikely(!dentry))
-+ goto out_stale;
-+ if (unlikely(dentry->d_inode->i_ino != ino))
-+ goto out_dput;
-+
-+ accept:
-+ inode = dentry->d_inode;
-+ h_inode = NULL;
-+ ii_read_lock_child(inode);
-+ if (ibstart(inode) <= bindex && bindex <= ibend(inode))
-+ h_inode = au_h_iptr_i(inode, bindex);
-+ ii_read_unlock(inode);
-+ if (h_inode
-+ && h_inode->i_generation == fh[Fh_h_igen]
-+ && acceptable(context, dentry))
-+ goto out; /* success */
-+ out_dput:
-+ dput(dentry);
-+ out_stale:
-+ dentry = ERR_PTR(-ESTALE);
-+ out:
-+ lockdep_on();
-+ si_read_unlock(sb);
-+ TraceErrPtr(dentry);
-+ //au_debug_off();
-+ return dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int aufs_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len,
-+ int connectable)
-+{
-+ int err;
-+ struct super_block *sb, *h_sb;
-+ struct inode *inode, *h_inode, *dir;
-+ aufs_bindex_t bindex;
-+ union conv u;
-+ struct dentry *parent, *h_parent;
-+
-+ //au_debug_on();
-+ BUILD_BUG_ON(sizeof(u.ino) != sizeof(u.a));
-+ LKTRTrace("%.*s, max %d, conn %d\n",
-+ DLNPair(dentry), *max_len, connectable);
-+ DEBUG_ON(is_anon(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode);
-+ parent = dentry->d_parent;
-+ DEBUG_ON(is_anon(parent));
-+
-+ err = -ENOSPC;
-+ if (unlikely(*max_len <= Fh_tail)) {
-+ Warn1("NFSv2 client (max_len %d)?\n", *max_len);
-+ goto out;
-+ }
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ di_read_lock_child(dentry, AUFS_I_RLOCK);
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+#ifdef CONFIG_AUFS_DEBUG
-+ if (unlikely(!au_flag_test(sb, AuFlag_XINO)))
-+ Warn1("NFS-exporting requires xino\n");
-+#if 0
-+ if (unlikely(au_flag_test(sb, AuFlag_UDBA_INOTIFY)))
-+ Warn1("udba=inotify is not recommended when exporting\n");
-+#endif
-+#endif
-+
-+ err = -EPERM;
-+ bindex = ibstart(inode);
-+ h_sb = sbr_sb(sb, bindex);
-+ if (unlikely(!h_sb->s_export_op)) {
-+ Err1("%s branch is not exportable\n", au_sbtype(h_sb));
-+ goto out_unlock;
-+ }
-+
-+#if 0 //def CONFIG_AUFS_ROBR
-+ if (unlikely(SB_AUFS(h_sb))) {
-+ Err1("aufs branch is not supported\n");
-+ goto out_unlock;
-+ }
-+#endif
-+
-+ /* doesn't support pseudo-link */
-+ if (unlikely(bindex < dbstart(dentry)
-+ || dbend(dentry) < bindex
-+ || !au_h_dptr_i(dentry, bindex))) {
-+ Err("%.*s/%.*s, b%d, pseudo-link?\n",
-+ DLNPair(dentry->d_parent), DLNPair(dentry), bindex);
-+ goto out_unlock;
-+ }
-+
-+ fh[Fh_br_id_sigen] = encode_br_id_sigen(sbr_id(sb, bindex),
-+ au_sigen(sb));
-+ encode_ino(fh + Fh_ino, inode->i_ino);
-+ dir = parent->d_inode;
-+ encode_ino(fh + Fh_dir_ino, dir->i_ino);
-+ h_inode = au_h_iptr(inode);
-+ encode_ino(fh + Fh_h_ino, h_inode->i_ino);
-+ fh[Fh_h_igen] = h_inode->i_generation;
-+
-+ /* it should be set at exporting time */
-+ if (unlikely(!h_sb->s_export_op->find_exported_dentry)) {
-+ Warn("set default find_exported_dentry for %s\n",
-+ au_sbtype(h_sb));
-+ h_sb->s_export_op->find_exported_dentry = find_exported_dentry;
-+ }
-+
-+ *max_len -= Fh_tail;
-+ //LKTRTrace("Fh_tail %d, max_len %d\n", Fh_tail, *max_len);
-+ h_parent = au_h_dptr_i(parent, bindex);
-+ DEBUG_ON(is_anon(h_parent));
-+ err = fh[Fh_h_type] = CALL(h_sb->s_export_op, encode_fh)
-+ (h_parent, fh + Fh_tail, max_len, connectable);
-+ *max_len += Fh_tail;
-+ if (err != 255)
-+ err = 2; //??
-+ else
-+ Warn1("%s encode_fh failed\n", au_sbtype(h_sb));
-+
-+ out_unlock:
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ aufs_read_unlock(dentry, AUFS_I_RLOCK);
-+ out:
-+ TraceErr(err);
-+ //au_debug_off();
-+ if (unlikely(err < 0))
-+ err = 255;
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if 0
-+struct export_operations {
-+ struct dentry *(*decode_fh)(struct super_block *sb, __u32 *fh, int fh_len, int fh_type,
-+ int (*acceptable)(void *context, struct dentry *de),
-+ void *context);
-+ int (*encode_fh)(struct dentry *de, __u32 *fh, int *max_len,
-+ int connectable);
-+
-+ /* the following are only called from the filesystem itself */
-+ int (*get_name)(struct dentry *parent, char *name,
-+ struct dentry *child);
-+ struct dentry * (*get_parent)(struct dentry *child);
-+ struct dentry * (*get_dentry)(struct super_block *sb, void *inump);
-+
-+ /* This is set by the exporting module to a standard helper */
-+ struct dentry * (*find_exported_dentry)(
-+ struct super_block *sb, void *obj, void *parent,
-+ int (*acceptable)(void *context, struct dentry *de),
-+ void *context);
-+};
-+#endif
-+
-+struct export_operations aufs_export_op = {
-+ .decode_fh = aufs_decode_fh,
-+ .encode_fh = aufs_encode_fh
-+};
-diff --git a/fs/aufs/f_op.c b/fs/aufs/f_op.c
-new file mode 100755
-index 0000000..3cd1081
---- /dev/null
-+++ b/fs/aufs/f_op.c
-@@ -0,0 +1,684 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: f_op.c,v 1.27 2007/05/14 03:38:24 sfjro Exp $ */
-+
-+#include <linux/fsnotify.h>
-+#include <linux/pagemap.h>
-+#include <linux/poll.h>
-+#include <linux/security.h>
-+#include <linux/version.h>
-+#include "aufs.h"
-+
-+/* common function to regular file and dir */
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+#define FlushArgs hidden_file, id
-+int aufs_flush(struct file *file, fl_owner_t id)
-+#else
-+#define FlushArgs hidden_file
-+int aufs_flush(struct file *file)
-+#endif
-+{
-+ int err;
-+ struct dentry *dentry;
-+ aufs_bindex_t bindex, bend;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+
-+ // aufs_read_lock_file()
-+ si_read_lock(dentry->d_sb);
-+ fi_read_lock(file);
-+ di_read_lock_child(dentry, !AUFS_I_RLOCK);
-+
-+ err = 0;
-+ bend = fbend(file);
-+ for (bindex = fbstart(file); !err && bindex <= bend; bindex++) {
-+ struct file *hidden_file;
-+ hidden_file = au_h_fptr_i(file, bindex);
-+ if (hidden_file && hidden_file->f_op
-+ && hidden_file->f_op->flush)
-+ err = hidden_file->f_op->flush(FlushArgs);
-+ }
-+
-+ di_read_unlock(dentry, !AUFS_I_RLOCK);
-+ fi_read_unlock(file);
-+ si_read_unlock(dentry->d_sb);
-+ TraceErr(err);
-+ return err;
-+}
-+#undef FlushArgs
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int do_open_nondir(struct file *file, int flags)
-+{
-+ int err;
-+ aufs_bindex_t bindex;
-+ struct super_block *sb;
-+ struct file *hidden_file;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct aufs_finfo *finfo;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, flags 0%o\n", DLNPair(dentry), flags);
-+ FiMustWriteLock(file);
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode || S_ISDIR(inode->i_mode));
-+
-+ err = 0;
-+ finfo = ftofi(file);
-+ finfo->fi_h_vm_ops = NULL;
-+ sb = dentry->d_sb;
-+ bindex = dbstart(dentry);
-+ DEBUG_ON(!au_h_dptr(dentry)->d_inode);
-+ /* O_TRUNC is processed already */
-+ BUG_ON(test_ro(sb, bindex, inode) && (flags & O_TRUNC));
-+
-+ hidden_file = hidden_open(dentry, bindex, flags);
-+ //if (LktrCond) {fput(hidden_file); br_put(stobr(dentry->d_sb, bindex));
-+ //hidden_file = ERR_PTR(-1);}
-+ if (!IS_ERR(hidden_file)) {
-+ set_fbstart(file, bindex);
-+ set_fbend(file, bindex);
-+ set_h_fptr(file, bindex, hidden_file);
-+ return 0; /* success */
-+ }
-+ err = PTR_ERR(hidden_file);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int aufs_open_nondir(struct inode *inode, struct file *file)
-+{
-+ return au_do_open(inode, file, do_open_nondir);
-+}
-+
-+static int aufs_release_nondir(struct inode *inode, struct file *file)
-+{
-+ struct super_block *sb = file->f_dentry->d_sb;
-+
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(file->f_dentry));
-+
-+ si_read_lock(sb);
-+ au_fin_finfo(file);
-+ si_read_unlock(sb);
-+ return 0;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static ssize_t aufs_read(struct file *file, char __user *buf, size_t count,
-+ loff_t *ppos)
-+{
-+ ssize_t err;
-+ struct dentry *dentry;
-+ struct file *hidden_file;
-+ struct super_block *sb;
-+ struct inode *h_inode;
-+ int dlgt;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(dentry), (unsigned long)count, *ppos);
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/0,
-+ /*locked*/0);
-+ //if (LktrCond) {fi_read_unlock(file); err = -1;}
-+ if (unlikely(err))
-+ goto out;
-+
-+ /* support LSM and notify */
-+ dlgt = need_dlgt(sb);
-+ hidden_file = au_h_fptr(file);
-+ h_inode = hidden_file->f_dentry->d_inode;
-+ if (!au_flag_test(sb, AuFlag_UDBA_INOTIFY))
-+ err = vfsub_read_u(hidden_file, buf, count, ppos, dlgt);
-+ else {
-+ struct inode *dir = dentry->d_parent->d_inode,
-+ *h_dir = hidden_file->f_dentry->d_parent->d_inode;
-+ aufs_bindex_t bstart = fbstart(file);
-+ hdir_lock(h_dir, dir, bstart);
-+ err = vfsub_read_u(hidden_file, buf, count, ppos, dlgt);
-+ hdir_unlock(h_dir, dir, bstart);
-+ }
-+ memcpy(&file->f_ra, &hidden_file->f_ra, sizeof(file->f_ra)); //??
-+ dentry->d_inode->i_atime = hidden_file->f_dentry->d_inode->i_atime;
-+
-+ fi_read_unlock(file);
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static ssize_t aufs_write(struct file *file, const char __user *__buf,
-+ size_t count, loff_t *ppos)
-+{
-+ ssize_t err;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct super_block *sb;
-+ struct file *hidden_file;
-+ char __user *buf = (char __user*)__buf;
-+ struct inode *h_inode;
-+ int dlgt;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(dentry), (unsigned long)count, *ppos);
-+
-+ inode = dentry->d_inode;
-+ i_lock(inode);
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/1,
-+ /*locked*/1);
-+ //if (LktrCond) {fi_write_unlock(file); err = -1;}
-+ if (unlikely(err))
-+ goto out;
-+ err = au_ready_to_write(file, -1);
-+ //if (LktrCond) err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+
-+ /* support LSM and notify */
-+ dlgt = need_dlgt(sb);
-+ hidden_file = au_h_fptr(file);
-+ h_inode = hidden_file->f_dentry->d_inode;
-+ if (!au_flag_test(sb, AuFlag_UDBA_INOTIFY))
-+ err = vfsub_write_u(hidden_file, buf, count, ppos, dlgt);
-+ else {
-+ struct inode *dir = dentry->d_parent->d_inode,
-+ *h_dir = hidden_file->f_dentry->d_parent->d_inode;
-+ aufs_bindex_t bstart = fbstart(file);
-+ hdir_lock(h_dir, dir, bstart);
-+ err = vfsub_write_u(hidden_file, buf, count, ppos, dlgt);
-+ hdir_unlock(h_dir, dir, bstart);
-+ }
-+ ii_write_lock_child(inode);
-+ au_cpup_attr_timesizes(inode);
-+ ii_write_unlock(inode);
-+
-+ out_unlock:
-+ fi_write_unlock(file);
-+ out:
-+ si_read_unlock(sb);
-+ i_unlock(inode);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if 0 //def CONFIG_AUFS_ROBR
-+struct lvma {
-+ struct list_head list;
-+ struct vm_area_struct *vma;
-+};
-+
-+static struct file *safe_file(struct vm_area_struct *vma)
-+{
-+ struct file *file = vma->vm_file;
-+ struct super_block *sb = file->f_dentry->d_sb;
-+ struct lvma *lvma, *entry;
-+ struct aufs_sbinfo *sbinfo;
-+ int found, warn;
-+
-+ TraceEnter();
-+ DEBUG_ON(!SB_AUFS(sb));
-+
-+ warn = 0;
-+ found = 0;
-+ sbinfo = stosi(sb);
-+ spin_lock(&sbinfo->si_lvma_lock);
-+ list_for_each_entry(entry, &sbinfo->si_lvma, list) {
-+ found = (entry->vma == vma);
-+ if (unlikely(found))
-+ break;
-+ }
-+ if (!found) {
-+ lvma = kmalloc(sizeof(*lvma), GFP_ATOMIC);
-+ if (lvma) {
-+ lvma->vma = vma;
-+ list_add(&lvma->list, &sbinfo->si_lvma);
-+ } else {
-+ warn = 1;
-+ file = NULL;
-+ }
-+ } else
-+ file = NULL;
-+ spin_unlock(&sbinfo->si_lvma_lock);
-+
-+ if (unlikely(warn))
-+ Warn1("no memory for lvma\n");
-+ return file;
-+}
-+
-+static void reset_file(struct vm_area_struct *vma, struct file *file)
-+{
-+ struct super_block *sb = file->f_dentry->d_sb;
-+ struct lvma *entry, *found;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+ DEBUG_ON(!SB_AUFS(sb));
-+
-+ vma->vm_file = file;
-+
-+ found = NULL;
-+ sbinfo = stosi(sb);
-+ spin_lock(&sbinfo->si_lvma_lock);
-+ list_for_each_entry(entry, &sbinfo->si_lvma, list)
-+ if (entry->vma == vma){
-+ found = entry;
-+ break;
-+ }
-+ DEBUG_ON(!found);
-+ list_del(&found->list);
-+ spin_unlock(&sbinfo->si_lvma_lock);
-+ kfree(found);
-+}
-+
-+#else
-+
-+static struct file *safe_file(struct vm_area_struct *vma)
-+{
-+ struct file *file;
-+
-+ file = vma->vm_file;
-+ if (file->private_data && au_is_aufs(file->f_dentry->d_sb))
-+ return file;
-+ return NULL;
-+}
-+
-+static void reset_file(struct vm_area_struct *vma, struct file *file)
-+{
-+ vma->vm_file = file;
-+ smp_mb();
-+}
-+#endif /* CONFIG_AUFS_ROBR */
-+
-+static struct page *aufs_nopage(struct vm_area_struct *vma, unsigned long addr,
-+ int *type)
-+{
-+ struct page *page;
-+ struct dentry *dentry;
-+ struct file *file, *hidden_file;
-+ struct inode *inode;
-+ static DECLARE_WAIT_QUEUE_HEAD(wq);
-+ struct aufs_finfo *finfo;
-+
-+ TraceEnter();
-+ DEBUG_ON(!vma || !vma->vm_file);
-+ wait_event(wq, (file = safe_file(vma)));
-+ DEBUG_ON(!au_is_aufs(file->f_dentry->d_sb));
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, addr %lx\n", DLNPair(dentry), addr);
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!S_ISREG(inode->i_mode));
-+
-+ // do not revalidate, nor lock
-+ finfo = ftofi(file);
-+ hidden_file = finfo->fi_hfile[0 + finfo->fi_bstart].hf_file;
-+ DEBUG_ON(!hidden_file || !au_is_mmapped(file));
-+ vma->vm_file = hidden_file;
-+ //smp_mb();
-+ page = finfo->fi_h_vm_ops->nopage(vma, addr, type);
-+ reset_file(vma, file);
-+#if 0 //def CONFIG_SMP
-+ //wake_up_nr(&wq, online_cpu - 1);
-+ wake_up_all(&wq);
-+#else
-+ wake_up(&wq);
-+#endif
-+ if (!IS_ERR(page)) {
-+ //page->mapping = file->f_mapping;
-+ //get_page(page);
-+ //file->f_mapping = hidden_file->f_mapping;
-+ //touch_atime(NULL, dentry);
-+ //inode->i_atime = hidden_file->f_dentry->d_inode->i_atime;
-+ }
-+ TraceErrPtr(page);
-+ return page;
-+}
-+
-+static int aufs_populate(struct vm_area_struct *vma, unsigned long addr,
-+ unsigned long len, pgprot_t prot, unsigned long pgoff,
-+ int nonblock)
-+{
-+ Err("please report me this application\n");
-+ BUG();
-+ return ftofi(vma->vm_file)->fi_h_vm_ops->populate
-+ (vma, addr, len, prot, pgoff, nonblock);
-+}
-+
-+static struct vm_operations_struct aufs_vm_ops = {
-+ //.open = aufs_vmaopen,
-+ //.close = aufs_vmaclose,
-+ .nopage = aufs_nopage,
-+ .populate = aufs_populate,
-+ //page_mkwrite(struct vm_area_struct *vma, struct page *page)
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int aufs_mmap(struct file *file, struct vm_area_struct *vma)
-+{
-+ int err, wlock, mmapped;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+ struct file *h_file;
-+ struct vm_operations_struct *vm_ops;
-+ unsigned long flags;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, %lx, len %lu\n",
-+ DLNPair(dentry), vma->vm_start, vma->vm_end - vma->vm_start);
-+ DEBUG_ON(!S_ISREG(dentry->d_inode->i_mode));
-+ DEBUG_ON(down_write_trylock(&vma->vm_mm->mmap_sem));
-+
-+ mmapped = au_is_mmapped(file);
-+ wlock = 0;
-+ if (file->f_mode & FMODE_WRITE) {
-+ flags = VM_SHARED | VM_WRITE;
-+ wlock = ((flags & vma->vm_flags) == flags);
-+ }
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir,
-+ wlock | !mmapped, /*locked*/0);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+
-+ if (wlock) {
-+ err = au_ready_to_write(file, -1);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+ }
-+
-+ h_file = au_h_fptr(file);
-+ vm_ops = ftofi(file)->fi_h_vm_ops;
-+ if (unlikely(!mmapped)) {
-+ // nfs uses some locks
-+ lockdep_off();
-+ err = h_file->f_op->mmap(h_file, vma);
-+ lockdep_on();
-+ if (unlikely(err))
-+ goto out_unlock;
-+ vm_ops = vma->vm_ops;
-+ DEBUG_ON(!vm_ops);
-+ err = do_munmap(current->mm, vma->vm_start,
-+ vma->vm_end - vma->vm_start);
-+ if (unlikely(err)) {
-+ IOErr("failed internal unmapping %.*s, %d\n",
-+ DLNPair(h_file->f_dentry), err);
-+ err = -EIO;
-+ goto out_unlock;
-+ }
-+ }
-+ DEBUG_ON(!vm_ops);
-+
-+ err = generic_file_mmap(file, vma);
-+ if (!err) {
-+ file_accessed(h_file);
-+ dentry->d_inode->i_atime = h_file->f_dentry->d_inode->i_atime;
-+ vma->vm_ops = &aufs_vm_ops;
-+ if (unlikely(!mmapped))
-+ ftofi(file)->fi_h_vm_ops = vm_ops;
-+ }
-+
-+ out_unlock:
-+ if (!wlock && mmapped)
-+ fi_read_unlock(file);
-+ else
-+ fi_write_unlock(file);
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+// todo: try do_sendfile() in fs/read_write.c
-+static ssize_t aufs_sendfile(struct file *file, loff_t *ppos,
-+ size_t count, read_actor_t actor, void *target)
-+{
-+ ssize_t err;
-+ struct file *h_file;
-+ const char c = current->comm[4];
-+ /* true if a kernel thread named 'loop[0-9].*' accesses a file */
-+ const int loopback = (current->mm == NULL
-+ && '0' <= c && c <= '9'
-+ && strncmp(current->comm, "loop", 4) == 0);
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld, cnt %lu, loopback %d\n",
-+ DLNPair(dentry), *ppos, (unsigned long)count, loopback);
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/0,
-+ /*locked*/0);
-+ if (unlikely(err))
-+ goto out;
-+
-+ err = -EINVAL;
-+ h_file = au_h_fptr(file);
-+ if (h_file->f_op && h_file->f_op->sendfile) {
-+ if (/* unlikely */(loopback)) {
-+ file->f_mapping = h_file->f_mapping;
-+ smp_mb(); //??
-+ }
-+ // nfs uses some locks
-+ lockdep_off();
-+ err = h_file->f_op->sendfile
-+ (h_file, ppos, count, actor, target);
-+ lockdep_on();
-+ dentry->d_inode->i_atime = h_file->f_dentry->d_inode->i_atime;
-+ }
-+ fi_read_unlock(file);
-+
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* copied from linux/fs/select.h, must match */
-+#define DEFAULT_POLLMASK (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)
-+
-+static unsigned int aufs_poll(struct file *file, poll_table *wait)
-+{
-+ unsigned int mask;
-+ struct file *hidden_file;
-+ int err;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, wait %p\n", DLNPair(dentry), wait);
-+ DEBUG_ON(S_ISDIR(dentry->d_inode->i_mode));
-+
-+ /* We should pretend an error happend. */
-+ mask = POLLERR /* | POLLIN | POLLOUT */;
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/0,
-+ /*locked*/0);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+
-+ /* it is not an error of hidden_file has no operation */
-+ mask = DEFAULT_POLLMASK;
-+ hidden_file = au_h_fptr(file);
-+ if (hidden_file->f_op && hidden_file->f_op->poll)
-+ mask = hidden_file->f_op->poll(hidden_file, wait);
-+ fi_read_unlock(file);
-+
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr((int)mask);
-+ return mask;
-+}
-+
-+static int aufs_fsync_nondir(struct file *file, struct dentry *dentry,
-+ int datasync)
-+{
-+ int err, my_lock;
-+ struct inode *inode;
-+ struct file *hidden_file;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), datasync);
-+ inode = dentry->d_inode;
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
-+ IMustLock(inode);
-+ my_lock = 0;
-+#else
-+ /* before 2.6.17,
-+ * msync(2) calls me without locking i_sem/i_mutex, but fsync(2).
-+ */
-+ my_lock = !i_trylock(inode);
-+#endif
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = 0; //-EBADF; // posix?
-+ if (unlikely(!(file->f_mode & FMODE_WRITE)))
-+ goto out;
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/1,
-+ /*locked*/1);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+ err = au_ready_to_write(file, -1);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+
-+ err = -EINVAL;
-+ hidden_file = au_h_fptr(file);
-+ if (hidden_file->f_op && hidden_file->f_op->fsync) {
-+ // todo: apparmor thread?
-+ //file->f_mapping->host->i_mutex
-+ ii_write_lock_child(inode);
-+ hi_lock_child(hidden_file->f_dentry->d_inode);
-+ err = hidden_file->f_op->fsync
-+ (hidden_file, hidden_file->f_dentry, datasync);
-+ //err = -1;
-+ au_cpup_attr_timesizes(inode);
-+ i_unlock(hidden_file->f_dentry->d_inode);
-+ ii_write_unlock(inode);
-+ }
-+
-+ out_unlock:
-+ fi_write_unlock(file);
-+ out:
-+ if (unlikely(my_lock))
-+ i_unlock(inode);
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int aufs_fasync(int fd, struct file *file, int flag)
-+{
-+ int err;
-+ struct file *hidden_file;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), flag);
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/0,
-+ /*locked*/0);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+
-+ hidden_file = au_h_fptr(file);
-+ if (hidden_file->f_op && hidden_file->f_op->fasync)
-+ err = hidden_file->f_op->fasync(fd, hidden_file, flag);
-+ fi_read_unlock(file);
-+
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if 0 // comment
-+struct file_operations {
-+ struct module *owner;
-+ loff_t (*llseek) (struct file *, loff_t, int);
-+ ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
-+ ssize_t (*aio_read) (struct kiocb *, char __user *, size_t, loff_t);
-+ ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
-+ ssize_t (*aio_write) (struct kiocb *, const char __user *, size_t, loff_t);
-+ int (*readdir) (struct file *, void *, filldir_t);
-+ unsigned int (*poll) (struct file *, struct poll_table_struct *);
-+ int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
-+ long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
-+ long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
-+ int (*mmap) (struct file *, struct vm_area_struct *);
-+ int (*open) (struct inode *, struct file *);
-+ int (*flush) (struct file *);
-+ int (*release) (struct inode *, struct file *);
-+ int (*fsync) (struct file *, struct dentry *, int datasync);
-+ int (*aio_fsync) (struct kiocb *, int datasync);
-+ int (*fasync) (int, struct file *, int);
-+ int (*lock) (struct file *, int, struct file_lock *);
-+ ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
-+ ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
-+ ssize_t (*sendfile) (struct file *, loff_t *, size_t, read_actor_t, void *);
-+ ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
-+ unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
-+ int (*check_flags)(int);
-+ int (*dir_notify)(struct file *file, unsigned long arg);
-+ int (*flock) (struct file *, int, struct file_lock *);
-+};
-+#endif
-+
-+struct file_operations aufs_file_fop = {
-+ .read = aufs_read,
-+ .write = aufs_write,
-+ .poll = aufs_poll,
-+ .mmap = aufs_mmap,
-+ .open = aufs_open_nondir,
-+ .flush = aufs_flush,
-+ .release = aufs_release_nondir,
-+ .fsync = aufs_fsync_nondir,
-+ .fasync = aufs_fasync,
-+ .sendfile = aufs_sendfile,
-+};
-diff --git a/fs/aufs/file.c b/fs/aufs/file.c
-new file mode 100755
-index 0000000..857a4e8
---- /dev/null
-+++ b/fs/aufs/file.c
-@@ -0,0 +1,832 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: file.c,v 1.42 2007/05/14 03:39:09 sfjro Exp $ */
-+
-+//#include <linux/fsnotify.h>
-+#include <linux/pagemap.h>
-+//#include <linux/poll.h>
-+//#include <linux/security.h>
-+#include "aufs.h"
-+
-+/* drop flags for writing */
-+unsigned int au_file_roflags(unsigned int flags)
-+{
-+ flags &= ~(O_WRONLY | O_RDWR | O_APPEND | O_CREAT | O_TRUNC);
-+ flags |= O_RDONLY | O_NOATIME;
-+ return flags;
-+}
-+
-+/* common functions to regular file and dir */
-+struct file *hidden_open(struct dentry *dentry, aufs_bindex_t bindex, int flags)
-+{
-+ struct dentry *hidden_dentry;
-+ struct inode *hidden_inode;
-+ struct super_block *sb;
-+ struct vfsmount *hidden_mnt;
-+ struct file *hidden_file;
-+ struct aufs_branch *br;
-+ loff_t old_size;
-+ int udba;
-+
-+ LKTRTrace("%.*s, b%d, flags 0%o\n", DLNPair(dentry), bindex, flags);
-+ DEBUG_ON(!dentry);
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ DEBUG_ON(!hidden_dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+
-+ sb = dentry->d_sb;
-+ udba = au_flag_test(sb, AuFlag_UDBA_INOTIFY);
-+ if (unlikely(udba)) {
-+ // test here?
-+ }
-+
-+ br = stobr(sb, bindex);
-+ br_get(br);
-+ /* drop flags for writing */
-+ if (test_ro(sb, bindex, dentry->d_inode))
-+ flags = au_file_roflags(flags);
-+ flags &= ~O_CREAT;
-+ spin_lock(&hidden_inode->i_lock);
-+ old_size = i_size_read(hidden_inode);
-+ spin_unlock(&hidden_inode->i_lock);
-+
-+ //DbgSleep(3);
-+
-+ dget(hidden_dentry);
-+ hidden_mnt = mntget(br->br_mnt);
-+ hidden_file = dentry_open(hidden_dentry, hidden_mnt, flags);
-+ //if (LktrCond) {fput(hidden_file); hidden_file = ERR_PTR(-1);}
-+
-+ if (!IS_ERR(hidden_file)) {
-+#if 0 // remove this
-+ if (/* old_size && */ (flags & O_TRUNC)) {
-+ au_direval_dec(dentry);
-+ if (!IS_ROOT(dentry))
-+ au_direval_dec(dentry->d_parent);
-+ }
-+#endif
-+ return hidden_file;
-+ }
-+
-+ br_put(br);
-+ TraceErrPtr(hidden_file);
-+ return hidden_file;
-+}
-+
-+static int do_coo(struct dentry *dentry, aufs_bindex_t bstart)
-+{
-+ int err;
-+ struct dentry *parent, *h_parent, *h_dentry;
-+ aufs_bindex_t bcpup;
-+ struct inode *h_dir, *h_inode, *dir;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(IS_ROOT(dentry));
-+ DiMustWriteLock(dentry);
-+
-+ parent = dentry->d_parent; // dget_parent()
-+ di_write_lock_parent(parent);
-+ bcpup = err = find_rw_parent_br(dentry, bstart);
-+ //bcpup = err = find_rw_br(sb, bstart);
-+ if (unlikely(err < 0)) {
-+ err = 0; // stop copyup, it is not an error
-+ goto out;
-+ }
-+ err = 0;
-+
-+ h_parent = au_h_dptr_i(parent, bcpup);
-+ if (!h_parent) {
-+ err = cpup_dirs(dentry, bcpup, NULL);
-+ if (unlikely(err))
-+ goto out;
-+ h_parent = au_h_dptr_i(parent, bcpup);
-+ }
-+
-+ h_dir = h_parent->d_inode;
-+ h_dentry = au_h_dptr_i(dentry, bstart);
-+ h_inode = h_dentry->d_inode;
-+ dir = parent->d_inode;
-+ hdir_lock(h_dir, dir, bcpup);
-+ hi_lock_child(h_inode);
-+ DEBUG_ON(au_h_dptr_i(dentry, bcpup));
-+ err = sio_cpup_simple(dentry, bcpup, -1,
-+ au_flags_cpup(CPUP_DTIME, parent));
-+ TraceErr(err);
-+ i_unlock(h_inode);
-+ hdir_unlock(h_dir, dir, bcpup);
-+
-+ out:
-+ di_write_unlock(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_do_open(struct inode *inode, struct file *file,
-+ int (*open)(struct file *file, int flags))
-+{
-+ int err, coo;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+ aufs_bindex_t bstart;
-+ struct inode *h_dir, *dir;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(dentry));
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ coo = 0;
-+#if 0
-+ switch (au_flag_test_coo(sb)) {
-+ case AuFlag_COO_LEAF:
-+ coo = !S_ISDIR(inode->i_mode);
-+ break;
-+ case AuFlag_COO_ALL:
-+ coo = 1;
-+ break;
-+ }
-+#endif
-+ err = au_init_finfo(file);
-+ //if (LktrCond) {fi_write_unlock(file); fin_finfo(file); err = -1;}
-+ if (unlikely(err))
-+ goto out;
-+
-+ if (!coo) {
-+ di_read_lock_child(dentry, AUFS_I_RLOCK);
-+ bstart = dbstart(dentry);
-+ } else {
-+ di_write_lock_child(dentry);
-+ bstart = dbstart(dentry);
-+ if (test_ro(sb, bstart, dentry->d_inode)) {
-+ err = do_coo(dentry, bstart);
-+ if (err) {
-+ di_write_unlock(dentry);
-+ goto out_finfo;
-+ }
-+ bstart = dbstart(dentry);
-+ }
-+ di_downgrade_lock(dentry, AUFS_I_RLOCK);
-+ }
-+
-+ // todo: remove this extra locks
-+ dir = dentry->d_parent->d_inode;
-+ if (!IS_ROOT(dentry))
-+ ii_read_lock_parent(dir);
-+ h_dir = au_h_iptr_i(dir, bstart);
-+ hdir_lock(h_dir, dir, bstart);
-+ err = open(file, file->f_flags);
-+ //if (LktrCond) err = -1;
-+ hdir_unlock(h_dir, dir, bstart);
-+ if (!IS_ROOT(dentry))
-+ ii_read_unlock(dir);
-+ di_read_unlock(dentry, AUFS_I_RLOCK);
-+
-+ out_finfo:
-+ fi_write_unlock(file);
-+ if (unlikely(err))
-+ au_fin_finfo(file);
-+ //DbgFile(file);
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_reopen_nondir(struct file *file)
-+{
-+ int err;
-+ struct dentry *dentry;
-+ aufs_bindex_t bstart, bindex, bend;
-+ struct file *hidden_file, *h_file_tmp;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(S_ISDIR(dentry->d_inode->i_mode)
-+ || !au_h_dptr(dentry)->d_inode);
-+ bstart = dbstart(dentry);
-+
-+ h_file_tmp = NULL;
-+ if (fbstart(file) == bstart) {
-+ hidden_file = au_h_fptr(file);
-+ if (file->f_mode == hidden_file->f_mode)
-+ return 0; /* success */
-+ h_file_tmp = hidden_file;
-+ get_file(h_file_tmp);
-+ set_h_fptr(file, bstart, NULL);
-+ }
-+ DEBUG_ON(fbstart(file) < bstart
-+ || ftofi(file)->fi_hfile[0 + bstart].hf_file);
-+
-+ hidden_file = hidden_open(dentry, bstart, file->f_flags & ~O_TRUNC);
-+ //if (LktrCond) {fput(hidden_file); br_put(stobr(dentry->d_sb, bstart));
-+ //hidden_file = ERR_PTR(-1);}
-+ err = PTR_ERR(hidden_file);
-+ if (IS_ERR(hidden_file))
-+ goto out; // close all?
-+ err = 0;
-+ //cpup_file_flags(hidden_file, file);
-+ set_fbstart(file, bstart);
-+ set_h_fptr(file, bstart, hidden_file);
-+ memcpy(&hidden_file->f_ra, &file->f_ra, sizeof(file->f_ra)); //??
-+
-+ /* close lower files */
-+ bend = fbend(file);
-+ for (bindex = bstart + 1; bindex <= bend; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+ set_fbend(file, bstart);
-+
-+ out:
-+ if (h_file_tmp)
-+ fput(h_file_tmp);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * copyup the deleted file for writing.
-+ */
-+static int cpup_wh_file(struct file *file, aufs_bindex_t bdst, loff_t len)
-+{
-+ int err;
-+ struct dentry *dentry, *parent, *hidden_parent, *tmp_dentry;
-+ struct dentry *hidden_dentry_bstart, *hidden_dentry_bdst;
-+ struct inode *hidden_dir;
-+ aufs_bindex_t bstart;
-+ struct aufs_dinfo *dinfo;
-+ struct dtime dt;
-+ struct lkup_args lkup;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, bdst %d, len %Lu\n", DLNPair(dentry), bdst, len);
-+ DEBUG_ON(S_ISDIR(dentry->d_inode->i_mode)
-+ || !(file->f_mode & FMODE_WRITE));
-+ DiMustWriteLock(dentry);
-+ parent = dentry->d_parent;
-+ IiMustAnyLock(parent->d_inode);
-+ hidden_parent = au_h_dptr_i(parent, bdst);
-+ DEBUG_ON(!hidden_parent);
-+ hidden_dir = hidden_parent->d_inode;
-+ DEBUG_ON(!hidden_dir);
-+ IMustLock(hidden_dir);
-+
-+ sb = parent->d_sb;
-+ lkup.nfsmnt = au_nfsmnt(sb, bdst);
-+ lkup.dlgt = need_dlgt(sb);
-+ tmp_dentry = lkup_whtmp(hidden_parent, &dentry->d_name, &lkup);
-+ //if (LktrCond) {dput(tmp_dentry); tmp_dentry = ERR_PTR(-1);}
-+ err = PTR_ERR(tmp_dentry);
-+ if (IS_ERR(tmp_dentry))
-+ goto out;
-+
-+ dtime_store(&dt, parent, hidden_parent);
-+ dinfo = dtodi(dentry);
-+ bstart = dinfo->di_bstart;
-+ hidden_dentry_bdst = dinfo->di_hdentry[0 + bdst].hd_dentry;
-+ hidden_dentry_bstart = dinfo->di_hdentry[0 + bstart].hd_dentry;
-+ dinfo->di_bstart = bdst;
-+ dinfo->di_hdentry[0 + bdst].hd_dentry = tmp_dentry;
-+ dinfo->di_hdentry[0 + bstart].hd_dentry = au_h_fptr(file)->f_dentry;
-+ err = cpup_single(dentry, bdst, bstart, len,
-+ au_flags_cpup(!CPUP_DTIME, parent));
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ err = au_reopen_nondir(file);
-+ //err = -1;
-+ dinfo->di_hdentry[0 + bstart].hd_dentry = hidden_dentry_bstart;
-+ dinfo->di_hdentry[0 + bdst].hd_dentry = hidden_dentry_bdst;
-+ dinfo->di_bstart = bstart;
-+ if (unlikely(err))
-+ goto out_tmp;
-+
-+ DEBUG_ON(!d_unhashed(dentry));
-+ err = vfsub_unlink(hidden_dir, tmp_dentry, lkup.dlgt);
-+ //if (LktrCond) err = -1;
-+ if (unlikely(err)) {
-+ IOErr("failed remove copied-up tmp file %.*s(%d)\n",
-+ DLNPair(tmp_dentry), err);
-+ err = -EIO;
-+ }
-+ dtime_revert(&dt, !CPUP_LOCKED_GHDIR);
-+
-+ out_tmp:
-+ dput(tmp_dentry);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct cpup_wh_file_args {
-+ int *errp;
-+ struct file *file;
-+ aufs_bindex_t bdst;
-+ loff_t len;
-+};
-+
-+static void call_cpup_wh_file(void *args)
-+{
-+ struct cpup_wh_file_args *a = args;
-+ *a->errp = cpup_wh_file(a->file, a->bdst, a->len);
-+}
-+
-+/*
-+ * prepare the @file for writing.
-+ */
-+int au_ready_to_write(struct file *file, loff_t len)
-+{
-+ int err;
-+ struct dentry *dentry, *parent, *hidden_dentry, *hidden_parent;
-+ struct inode *hidden_inode, *hidden_dir, *inode, *dir;
-+ struct super_block *sb;
-+ aufs_bindex_t bstart, bcpup;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, len %Ld\n", DLNPair(dentry), len);
-+ FiMustWriteLock(file);
-+
-+ sb = dentry->d_sb;
-+ bstart = fbstart(file);
-+ DEBUG_ON(ftobr(file, bstart) != stobr(sb, bstart));
-+
-+ inode = dentry->d_inode;
-+ ii_read_lock_child(inode);
-+ LKTRTrace("rdonly %d, bstart %d\n", test_ro(sb, bstart, inode), bstart);
-+ err = test_ro(sb, bstart, inode);
-+ ii_read_unlock(inode);
-+ if (!err && (au_h_fptr(file)->f_mode & FMODE_WRITE))
-+ return 0;
-+
-+ /* need to cpup */
-+ parent = dentry->d_parent; // dget_parent()
-+ di_write_lock_child(dentry);
-+ di_write_lock_parent(parent);
-+ bcpup = err = find_rw_parent_br(dentry, bstart);
-+ //bcpup = err = find_rw_br(sb, bstart);
-+ if (unlikely(err < 0))
-+ goto out_unlock;
-+ err = 0;
-+
-+ hidden_parent = au_h_dptr_i(parent, bcpup);
-+ if (!hidden_parent) {
-+ err = cpup_dirs(dentry, bcpup, NULL);
-+ //if (LktrCond) err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+ hidden_parent = au_h_dptr_i(parent, bcpup);
-+ }
-+
-+ hidden_dir = hidden_parent->d_inode;
-+ hidden_dentry = au_h_fptr(file)->f_dentry;
-+ hidden_inode = hidden_dentry->d_inode;
-+ dir = parent->d_inode;
-+ hdir_lock(hidden_dir, dir, bcpup);
-+ hi_lock_child(hidden_inode);
-+ if (d_unhashed(dentry) || d_unhashed(hidden_dentry)
-+ /* || !hidden_inode->i_nlink */) {
-+ if (!au_test_perm(hidden_dir, MAY_EXEC | MAY_WRITE,
-+ need_dlgt(sb)))
-+ err = cpup_wh_file(file, bcpup, len);
-+ else {
-+ struct cpup_wh_file_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .bdst = bcpup,
-+ .len = len
-+ };
-+ au_wkq_wait(call_cpup_wh_file, &args, /*dlgt*/0);
-+ }
-+ //if (LktrCond) err = -1;
-+ TraceErr(err);
-+ } else {
-+ if (!au_h_dptr_i(dentry, bcpup))
-+ err = sio_cpup_simple(dentry, bcpup, len,
-+ au_flags_cpup(CPUP_DTIME,
-+ parent));
-+ //if (LktrCond) err = -1;
-+ TraceErr(err);
-+ if (!err)
-+ err = au_reopen_nondir(file);
-+ //if (LktrCond) err = -1;
-+ TraceErr(err);
-+ }
-+ i_unlock(hidden_inode);
-+ hdir_unlock(hidden_dir, dir, bcpup);
-+
-+ out_unlock:
-+ di_write_unlock(parent);
-+ di_write_unlock(dentry);
-+// out:
-+ TraceErr(err);
-+ return err;
-+
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * after branch manipulating, refresh the file.
-+ */
-+static int refresh_file(struct file *file, int (*reopen)(struct file *file))
-+{
-+ int err, new_sz;
-+ struct dentry *dentry;
-+ aufs_bindex_t bend, bindex, bstart, brid;
-+ struct aufs_hfile *p;
-+ struct aufs_finfo *finfo;
-+ struct super_block *sb;
-+ struct inode *inode;
-+ struct file *hidden_file;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ FiMustWriteLock(file);
-+ DiMustReadLock(dentry);
-+ inode = dentry->d_inode;
-+ IiMustReadLock(inode);
-+ //au_debug_on();
-+ //DbgDentry(dentry);
-+ //DbgFile(file);
-+ //au_debug_off();
-+
-+ err = -ENOMEM;
-+ sb = dentry->d_sb;
-+ finfo = ftofi(file);
-+ bstart = finfo->fi_bstart;
-+ bend = finfo->fi_bstart;
-+ new_sz = sizeof(*finfo->fi_hfile) * (sbend(sb) + 1);
-+ p = au_kzrealloc(finfo->fi_hfile, sizeof(*p) * (finfo->fi_bend + 1),
-+ new_sz, GFP_KERNEL);
-+ //p = NULL;
-+ if (unlikely(!p))
-+ goto out;
-+ finfo->fi_hfile = p;
-+ hidden_file = p[0 + bstart].hf_file;
-+
-+ p = finfo->fi_hfile + finfo->fi_bstart;
-+ brid = p->hf_br->br_id;
-+ bend = finfo->fi_bend;
-+ for (bindex = finfo->fi_bstart; bindex <= bend; bindex++, p++) {
-+ struct aufs_hfile tmp, *q;
-+ aufs_bindex_t new_bindex;
-+
-+ if (!p->hf_file)
-+ continue;
-+ new_bindex = find_bindex(sb, p->hf_br);
-+ if (new_bindex == bindex)
-+ continue;
-+ if (new_bindex < 0) { // test here
-+ set_h_fptr(file, bindex, NULL);
-+ continue;
-+ }
-+
-+ /* swap two hidden inode, and loop again */
-+ q = finfo->fi_hfile + new_bindex;
-+ tmp = *q;
-+ *q = *p;
-+ *p = tmp;
-+ if (tmp.hf_file) {
-+ bindex--;
-+ p--;
-+ }
-+ }
-+ {
-+ aufs_bindex_t s = finfo->fi_bstart, e = finfo->fi_bend;
-+ finfo->fi_bstart = 0;
-+ finfo->fi_bend = sbend(sb);
-+ //au_debug_on();
-+ //DbgFile(file);
-+ //au_debug_off();
-+ finfo->fi_bstart = s;
-+ finfo->fi_bend = e;
-+ }
-+
-+ p = finfo->fi_hfile;
-+ if (!au_is_mmapped(file) && !d_unhashed(dentry)) {
-+ bend = sbend(sb);
-+ for (finfo->fi_bstart = 0; finfo->fi_bstart <= bend;
-+ finfo->fi_bstart++, p++)
-+ if (p->hf_file) {
-+ if (p->hf_file->f_dentry
-+ && p->hf_file->f_dentry->d_inode)
-+ break;
-+ else
-+ au_hfput(p);
-+ }
-+ } else {
-+ bend = find_brindex(sb, brid);
-+ //LKTRTrace("%d\n", bend);
-+ for (finfo->fi_bstart = 0; finfo->fi_bstart < bend;
-+ finfo->fi_bstart++, p++)
-+ if (p->hf_file)
-+ au_hfput(p);
-+ //LKTRTrace("%d\n", finfo->fi_bstart);
-+ bend = sbend(sb);
-+ }
-+
-+ p = finfo->fi_hfile + bend;
-+ for (finfo->fi_bend = bend; finfo->fi_bend >= finfo->fi_bstart;
-+ finfo->fi_bend--, p--)
-+ if (p->hf_file) {
-+ if (p->hf_file->f_dentry
-+ && p->hf_file->f_dentry->d_inode)
-+ break;
-+ else
-+ au_hfput(p);
-+ }
-+ //Dbg("%d, %d\n", finfo->fi_bstart, finfo->fi_bend);
-+ DEBUG_ON(finfo->fi_bend < finfo->fi_bstart);
-+ //DbgFile(file);
-+ //DbgDentry(file->f_dentry);
-+
-+ err = 0;
-+#if 0 // todo:
-+ if (!au_h_dptr(dentry)->d_inode) {
-+ au_update_figen(file);
-+ goto out; /* success */
-+ }
-+#endif
-+
-+ if (unlikely(au_is_mmapped(file) || d_unhashed(dentry)))
-+ goto out_update; /* success */
-+
-+ again:
-+ bstart = ibstart(inode);
-+ if (bstart < finfo->fi_bstart
-+ && au_flag_test(sb, AuFlag_PLINK)
-+ && au_is_plinked(sb, inode)) {
-+ struct dentry *parent = dentry->d_parent; // dget_parent()
-+ struct inode *dir = parent->d_inode, *h_dir;
-+
-+ if (test_ro(sb, bstart, inode)) {
-+ di_read_lock_parent(parent, !AUFS_I_RLOCK);
-+ bstart = err = find_rw_parent_br(dentry, bstart);
-+ //bstart = err = find_rw_br(sb, bstart);
-+ di_read_unlock(parent, !AUFS_I_RLOCK);
-+ //todo: err = -1;
-+ if (unlikely(err < 0))
-+ goto out;
-+ }
-+ di_read_unlock(dentry, AUFS_I_RLOCK);
-+ di_write_lock_child(dentry);
-+ if (bstart != ibstart(inode)) { // todo
-+ /* someone changed our inode while we were sleeping */
-+ di_downgrade_lock(dentry, AUFS_I_RLOCK);
-+ goto again;
-+ }
-+
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ err = test_and_cpup_dirs(dentry, bstart, NULL);
-+
-+ // always superio.
-+#if 1
-+ h_dir = au_h_dptr_i(parent, bstart)->d_inode;
-+ hdir_lock(h_dir, dir, bstart);
-+ err = sio_cpup_simple(dentry, bstart, -1,
-+ au_flags_cpup(CPUP_DTIME, parent));
-+ hdir_unlock(h_dir, dir, bstart);
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+#else
-+ if (!is_au_wkq(current)) {
-+ struct cpup_pseudo_link_args args = {
-+ .errp = &err,
-+ .dentry = dentry,
-+ .bdst = bstart,
-+ .do_lock = 1
-+ };
-+ au_wkq_wait(call_cpup_pseudo_link, &args);
-+ } else
-+ err = cpup_pseudo_link(dentry, bstart, /*do_lock*/1);
-+#endif
-+ di_downgrade_lock(dentry, AUFS_I_RLOCK);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+
-+ err = reopen(file);
-+ //err = -1;
-+ out_update:
-+ if (!err) {
-+ au_update_figen(file);
-+ //DbgFile(file);
-+ return 0; /* success */
-+ }
-+
-+ /* error, close all hidden files */
-+ bend = fbend(file);
-+ for (bindex = fbstart(file); bindex <= bend; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* common function to regular file and dir */
-+int au_reval_and_lock_finfo(struct file *file, int (*reopen)(struct file *file),
-+ int wlock, int locked)
-+{
-+ int err, sgen, fgen, pseudo_link;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+ aufs_bindex_t bstart;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, w %d, l %d\n", DLNPair(dentry), wlock, locked);
-+ sb = dentry->d_sb;
-+ SiMustAnyLock(sb);
-+
-+ err = 0;
-+ sgen = au_sigen(sb);
-+ fi_write_lock(file);
-+ fgen = au_figen(file);
-+ di_read_lock_child(dentry, AUFS_I_RLOCK);
-+ bstart = dbstart(dentry);
-+ pseudo_link = (bstart != ibstart(dentry->d_inode));
-+ di_read_unlock(dentry, AUFS_I_RLOCK);
-+ if (sgen == fgen && !pseudo_link && fbstart(file) == bstart) {
-+ if (!wlock)
-+ fi_downgrade_lock(file);
-+ return 0; /* success */
-+ }
-+
-+ LKTRTrace("sgen %d, fgen %d\n", sgen, fgen);
-+ if (sgen != au_digen(dentry)) {
-+ /*
-+ * d_path() and path_lookup() is a simple and good approach
-+ * to revalidate. but si_rwsem in DEBUG_RWSEM will cause a
-+ * deadlock. removed the code.
-+ */
-+ di_write_lock_child(dentry);
-+ err = au_reval_dpath(dentry, sgen);
-+ //if (LktrCond) err = -1;
-+ di_write_unlock(dentry);
-+ if (unlikely(err < 0))
-+ goto out;
-+ DEBUG_ON(au_digen(dentry) != sgen);
-+ }
-+
-+ di_read_lock_child(dentry, AUFS_I_RLOCK);
-+ err = refresh_file(file, reopen);
-+ //if (LktrCond) err = -1;
-+ di_read_unlock(dentry, AUFS_I_RLOCK);
-+ if (!err) {
-+ if (!wlock)
-+ fi_downgrade_lock(file);
-+ } else
-+ fi_write_unlock(file);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+// cf. aufs_nopage()
-+// for madvise(2)
-+static int aufs_readpage(struct file *file, struct page *page)
-+{
-+ TraceEnter();
-+ unlock_page(page);
-+ return 0;
-+}
-+
-+// they will never be called.
-+#ifdef CONFIG_AUFS_DEBUG
-+static int aufs_prepare_write(struct file *file, struct page *page,
-+ unsigned from, unsigned to)
-+{BUG();return 0;}
-+static int aufs_commit_write(struct file *file, struct page *page,
-+ unsigned from, unsigned to)
-+{BUG();return 0;}
-+static int aufs_writepage(struct page *page, struct writeback_control *wbc)
-+{BUG();return 0;}
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
-+static void aufs_sync_page(struct page *page)
-+{BUG();}
-+#else
-+static int aufs_sync_page(struct page *page)
-+{BUG(); return 0;}
-+#endif
-+
-+#if 0 // comment
-+static int aufs_writepages(struct address_space *mapping,
-+ struct writeback_control *wbc)
-+{BUG();return 0;}
-+static int aufs_readpages(struct file *filp, struct address_space *mapping,
-+ struct list_head *pages, unsigned nr_pages)
-+{BUG();return 0;}
-+static sector_t aufs_bmap(struct address_space *mapping, sector_t block)
-+{BUG();return 0;}
-+#endif
-+
-+static int aufs_set_page_dirty(struct page *page)
-+{BUG();return 0;}
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
-+static void aufs_invalidatepage (struct page *page, unsigned long offset)
-+{BUG();}
-+#else
-+static int aufs_invalidatepage (struct page *page, unsigned long offset)
-+{BUG(); return 0;}
-+#endif
-+static int aufs_releasepage (struct page *page, gfp_t gfp)
-+{BUG();return 0;}
-+static ssize_t aufs_direct_IO(int rw, struct kiocb *iocb,
-+ const struct iovec *iov, loff_t offset,
-+ unsigned long nr_segs)
-+{BUG();return 0;}
-+static struct page* aufs_get_xip_page(struct address_space *mapping,
-+ sector_t offset, int create)
-+{BUG();return NULL;}
-+//static int aufs_migratepage (struct page *newpage, struct page *page)
-+//{BUG();return 0;}
-+#endif
-+
-+#if 0 // comment
-+struct address_space {
-+ struct inode *host; /* owner: inode, block_device */
-+ struct radix_tree_root page_tree; /* radix tree of all pages */
-+ rwlock_t tree_lock; /* and rwlock protecting it */
-+ unsigned int i_mmap_writable;/* count VM_SHARED mappings */
-+ struct prio_tree_root i_mmap; /* tree of private and shared mappings */
-+ struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
-+ spinlock_t i_mmap_lock; /* protect tree, count, list */
-+ unsigned int truncate_count; /* Cover race condition with truncate */
-+ unsigned long nrpages; /* number of total pages */
-+ pgoff_t writeback_index;/* writeback starts here */
-+ struct address_space_operations *a_ops; /* methods */
-+ unsigned long flags; /* error bits/gfp mask */
-+ struct backing_dev_info *backing_dev_info; /* device readahead, etc */
-+ spinlock_t private_lock; /* for use by the address_space */
-+ struct list_head private_list; /* ditto */
-+ struct address_space *assoc_mapping; /* ditto */
-+} __attribute__((aligned(sizeof(long))));
-+
-+struct address_space_operations {
-+ int (*writepage)(struct page *page, struct writeback_control *wbc);
-+ int (*readpage)(struct file *, struct page *);
-+ void (*sync_page)(struct page *);
-+
-+ /* Write back some dirty pages from this mapping. */
-+ int (*writepages)(struct address_space *, struct writeback_control *);
-+
-+ /* Set a page dirty. Return true if this dirtied it */
-+ int (*set_page_dirty)(struct page *page);
-+
-+ int (*readpages)(struct file *filp, struct address_space *mapping,
-+ struct list_head *pages, unsigned nr_pages);
-+
-+ /*
-+ * ext3 requires that a successful prepare_write() call be followed
-+ * by a commit_write() call - they must be balanced
-+ */
-+ int (*prepare_write)(struct file *, struct page *, unsigned, unsigned);
-+ int (*commit_write)(struct file *, struct page *, unsigned, unsigned);
-+ /* Unfortunately this kludge is needed for FIBMAP. Don't use it */
-+ sector_t (*bmap)(struct address_space *, sector_t);
-+ void (*invalidatepage) (struct page *, unsigned long);
-+ int (*releasepage) (struct page *, gfp_t);
-+ ssize_t (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
-+ loff_t offset, unsigned long nr_segs);
-+ struct page* (*get_xip_page)(struct address_space *, sector_t,
-+ int);
-+ /* migrate the contents of a page to the specified target */
-+ int (*migratepage) (struct page *, struct page *);
-+};
-+#endif
-+
-+struct address_space_operations aufs_aop = {
-+ .readpage = aufs_readpage,
-+#ifdef CONFIG_AUFS_DEBUG
-+ .writepage = aufs_writepage,
-+ .sync_page = aufs_sync_page,
-+ //.writepages = aufs_writepages,
-+ .set_page_dirty = aufs_set_page_dirty,
-+ //.readpages = aufs_readpages,
-+ .prepare_write = aufs_prepare_write,
-+ .commit_write = aufs_commit_write,
-+ //.bmap = aufs_bmap,
-+ .invalidatepage = aufs_invalidatepage,
-+ .releasepage = aufs_releasepage,
-+ .direct_IO = aufs_direct_IO,
-+ .get_xip_page = aufs_get_xip_page,
-+ //.migratepage = aufs_migratepage
-+#endif
-+};
-diff --git a/fs/aufs/file.h b/fs/aufs/file.h
-new file mode 100755
-index 0000000..f0fa448
---- /dev/null
-+++ b/fs/aufs/file.h
-@@ -0,0 +1,140 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: file.h,v 1.25 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_FILE_H__
-+#define __AUFS_FILE_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/file.h>
-+#include <linux/fs.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+// SEEK_xxx are defined in linux/fs.h
-+#else
-+enum {SEEK_SET, SEEK_CUR, SEEK_END};
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_branch;
-+struct aufs_hfile {
-+ struct file *hf_file;
-+ struct aufs_branch *hf_br;
-+};
-+
-+struct aufs_vdir;
-+struct aufs_finfo {
-+ atomic_t fi_generation;
-+
-+ struct aufs_rwsem fi_rwsem;
-+ struct aufs_hfile *fi_hfile;
-+ aufs_bindex_t fi_bstart, fi_bend;
-+
-+ union {
-+ struct vm_operations_struct *fi_h_vm_ops;
-+ struct aufs_vdir *fi_vdir_cache;
-+ };
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* file.c */
-+extern struct address_space_operations aufs_aop;
-+unsigned int au_file_roflags(unsigned int flags);
-+struct file *hidden_open(struct dentry *dentry, aufs_bindex_t bindex,
-+ int flags);
-+int au_do_open(struct inode *inode, struct file *file,
-+ int (*open)(struct file *file, int flags));
-+int au_reopen_nondir(struct file *file);
-+int au_ready_to_write(struct file *file, loff_t len);
-+int au_reval_and_lock_finfo(struct file *file, int (*reopen)(struct file *file),
-+ int wlock, int locked);
-+
-+/* f_op.c */
-+extern struct file_operations aufs_file_fop;
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+int aufs_flush(struct file *file, fl_owner_t id);
-+#else
-+int aufs_flush(struct file *file);
-+#endif
-+
-+/* finfo.c */
-+struct aufs_finfo *ftofi(struct file *file);
-+aufs_bindex_t fbstart(struct file *file);
-+aufs_bindex_t fbend(struct file *file);
-+struct aufs_vdir *fvdir_cache(struct file *file);
-+struct aufs_branch *ftobr(struct file *file, aufs_bindex_t bindex);
-+struct file *au_h_fptr_i(struct file *file, aufs_bindex_t bindex);
-+struct file *au_h_fptr(struct file *file);
-+
-+void set_fbstart(struct file *file, aufs_bindex_t bindex);
-+void set_fbend(struct file *file, aufs_bindex_t bindex);
-+void set_fvdir_cache(struct file *file, struct aufs_vdir *vdir_cache);
-+void au_hfput(struct aufs_hfile *hf);
-+void set_h_fptr(struct file *file, aufs_bindex_t bindex, struct file *h_file);
-+void au_update_figen(struct file *file);
-+
-+void au_fin_finfo(struct file *file);
-+int au_init_finfo(struct file *file);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline int au_figen(struct file *f)
-+{
-+ return atomic_read(&ftofi(f)->fi_generation);
-+}
-+
-+static inline int au_is_mmapped(struct file *f)
-+{
-+ return !!(ftofi(f)->fi_h_vm_ops);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * fi_read_lock, fi_write_lock,
-+ * fi_read_unlock, fi_write_unlock, fi_downgrade_lock
-+ */
-+SimpleRwsemFuncs(fi, struct file *f, ftofi(f)->fi_rwsem);
-+
-+/* to debug easier, do not make them inlined functions */
-+#define FiMustReadLock(f) do {\
-+ SiMustAnyLock((f)->f_dentry->d_sb); \
-+ RwMustReadLock(&ftofi(f)->fi_rwsem); \
-+} while (0)
-+
-+#define FiMustWriteLock(f) do { \
-+ SiMustAnyLock((f)->f_dentry->d_sb); \
-+ RwMustWriteLock(&ftofi(f)->fi_rwsem); \
-+} while (0)
-+
-+#define FiMustAnyLock(f) do { \
-+ SiMustAnyLock((f)->f_dentry->d_sb); \
-+ RwMustAnyLock(&ftofi(f)->fi_rwsem); \
-+} while (0)
-+
-+#define FiMustNoWaiters(f) RwMustNoWaiters(&ftofi(f)->fi_rwsem)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_FILE_H__ */
-diff --git a/fs/aufs/finfo.c b/fs/aufs/finfo.c
-new file mode 100755
-index 0000000..1e09da8
---- /dev/null
-+++ b/fs/aufs/finfo.c
-@@ -0,0 +1,211 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: finfo.c,v 1.23 2007/04/30 05:45:21 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+struct aufs_finfo *ftofi(struct file *file)
-+{
-+ struct aufs_finfo *finfo = file->private_data;
-+ DEBUG_ON(!finfo
-+ || !finfo->fi_hfile
-+ || (0 < finfo->fi_bend
-+ && (/* stosi(file->f_dentry->d_sb)->si_bend
-+ < finfo->fi_bend
-+ || */ finfo->fi_bend < finfo->fi_bstart)));
-+ return finfo;
-+}
-+
-+// hard/soft set
-+aufs_bindex_t fbstart(struct file *file)
-+{
-+ FiMustAnyLock(file);
-+ return ftofi(file)->fi_bstart;
-+}
-+
-+aufs_bindex_t fbend(struct file *file)
-+{
-+ FiMustAnyLock(file);
-+ return ftofi(file)->fi_bend;
-+}
-+
-+struct aufs_vdir *fvdir_cache(struct file *file)
-+{
-+ FiMustAnyLock(file);
-+ return ftofi(file)->fi_vdir_cache;
-+}
-+
-+struct aufs_branch *ftobr(struct file *file, aufs_bindex_t bindex)
-+{
-+ struct aufs_finfo *finfo = ftofi(file);
-+ struct aufs_hfile *hf;
-+
-+ FiMustAnyLock(file);
-+ DEBUG_ON(!finfo
-+ || finfo->fi_bstart < 0
-+ || bindex < finfo->fi_bstart
-+ || finfo->fi_bend < bindex);
-+ hf = finfo->fi_hfile + bindex;
-+ DEBUG_ON(hf->hf_br && br_count(hf->hf_br) <= 0);
-+ return hf->hf_br;
-+}
-+
-+struct file *au_h_fptr_i(struct file *file, aufs_bindex_t bindex)
-+{
-+ struct aufs_finfo *finfo = ftofi(file);
-+ struct aufs_hfile *hf;
-+
-+ FiMustAnyLock(file);
-+ DEBUG_ON(!finfo
-+ || finfo->fi_bstart < 0
-+ || bindex < finfo->fi_bstart
-+ || finfo->fi_bend < bindex);
-+ hf = finfo->fi_hfile + bindex;
-+ DEBUG_ON(hf->hf_file
-+ && file_count(hf->hf_file) <= 0
-+ && br_count(hf->hf_br) <= 0);
-+ return hf->hf_file;
-+}
-+
-+struct file *au_h_fptr(struct file *file)
-+{
-+ return au_h_fptr_i(file, fbstart(file));
-+}
-+
-+void set_fbstart(struct file *file, aufs_bindex_t bindex)
-+{
-+ FiMustWriteLock(file);
-+ DEBUG_ON(sbend(file->f_dentry->d_sb) < bindex);
-+ ftofi(file)->fi_bstart = bindex;
-+}
-+
-+void set_fbend(struct file *file, aufs_bindex_t bindex)
-+{
-+ FiMustWriteLock(file);
-+ DEBUG_ON(sbend(file->f_dentry->d_sb) < bindex
-+ || bindex < fbstart(file));
-+ ftofi(file)->fi_bend = bindex;
-+}
-+
-+void set_fvdir_cache(struct file *file, struct aufs_vdir *vdir_cache)
-+{
-+ FiMustWriteLock(file);
-+ DEBUG_ON(!S_ISDIR(file->f_dentry->d_inode->i_mode)
-+ || (ftofi(file)->fi_vdir_cache && vdir_cache));
-+ ftofi(file)->fi_vdir_cache = vdir_cache;
-+}
-+
-+void au_hfput(struct aufs_hfile *hf)
-+{
-+ fput(hf->hf_file);
-+ hf->hf_file = NULL;
-+ DEBUG_ON(!hf->hf_br);
-+ br_put(hf->hf_br);
-+ hf->hf_br = NULL;
-+}
-+
-+void set_h_fptr(struct file *file, aufs_bindex_t bindex, struct file *val)
-+{
-+ struct aufs_finfo *finfo = ftofi(file);
-+ struct aufs_hfile *hf;
-+
-+ FiMustWriteLock(file);
-+ DEBUG_ON(!finfo
-+ || finfo->fi_bstart < 0
-+ || bindex < finfo->fi_bstart
-+ || finfo->fi_bend < bindex);
-+ DEBUG_ON(val && file_count(val) <= 0);
-+ hf = finfo->fi_hfile + bindex;
-+ DEBUG_ON(val && hf->hf_file);
-+ if (hf->hf_file)
-+ au_hfput(hf);
-+ if (val) {
-+ hf->hf_file = val;
-+ hf->hf_br = stobr(file->f_dentry->d_sb, bindex);
-+ }
-+}
-+
-+void au_update_figen(struct file *file)
-+{
-+ atomic_set(&ftofi(file)->fi_generation, au_digen(file->f_dentry));
-+}
-+
-+void au_fin_finfo(struct file *file)
-+{
-+ struct aufs_finfo *finfo;
-+ struct dentry *dentry;
-+ aufs_bindex_t bindex, bend;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ SiMustAnyLock(dentry->d_sb);
-+
-+ fi_write_lock(file);
-+ bend = fbend(file);
-+ bindex = fbstart(file);
-+ if (bindex >= 0)
-+ for (; bindex <= bend; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+
-+ finfo = ftofi(file);
-+#ifdef CONFIG_AUFS_DEBUG
-+ if (finfo->fi_bstart >= 0) {
-+ bend = fbend(file);
-+ for (bindex = finfo->fi_bstart; bindex <= bend; bindex++) {
-+ struct aufs_hfile *hf;
-+ hf = finfo->fi_hfile + bindex;
-+ DEBUG_ON(hf->hf_file || hf->hf_br);
-+ }
-+ }
-+#endif
-+
-+ kfree(finfo->fi_hfile);
-+ fi_write_unlock(file);
-+ cache_free_finfo(finfo);
-+ //file->private_data = NULL;
-+}
-+
-+int au_init_finfo(struct file *file)
-+{
-+ struct aufs_finfo *finfo;
-+ struct dentry *dentry;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(!dentry->d_inode);
-+
-+ finfo = cache_alloc_finfo();
-+ if (finfo) {
-+ finfo->fi_hfile = kcalloc(sbend(dentry->d_sb) + 1,
-+ sizeof(*finfo->fi_hfile), GFP_KERNEL);
-+ if (finfo->fi_hfile) {
-+ rw_init_wlock(&finfo->fi_rwsem);
-+ finfo->fi_bstart = -1;
-+ finfo->fi_bend = -1;
-+ atomic_set(&finfo->fi_generation, au_digen(dentry));
-+
-+ file->private_data = finfo;
-+ return 0; /* success */
-+ }
-+ cache_free_finfo(finfo);
-+ }
-+
-+ TraceErr(-ENOMEM);
-+ return -ENOMEM;
-+}
-diff --git a/fs/aufs/hinotify.c b/fs/aufs/hinotify.c
-new file mode 100755
-index 0000000..3bad3f7
---- /dev/null
-+++ b/fs/aufs/hinotify.c
-@@ -0,0 +1,536 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: hinotify.c,v 1.19 2007/05/14 03:39:21 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+static struct inotify_handle *in_handle;
-+static const __u32 in_mask = (IN_MOVE | IN_DELETE | IN_CREATE /* | IN_ACCESS */
-+ | IN_MODIFY | IN_ATTRIB
-+ | IN_DELETE_SELF | IN_MOVE_SELF);
-+
-+int alloc_hinotify(struct aufs_hinode *hinode, struct inode *inode,
-+ struct inode *hidden_inode)
-+{
-+ int err;
-+ struct aufs_hinotify *hin;
-+ s32 wd;
-+
-+ LKTRTrace("i%lu, hi%lu\n", inode->i_ino, hidden_inode->i_ino);
-+
-+ err = -ENOMEM;
-+ hin = cache_alloc_hinotify();
-+ if (hin) {
-+ DEBUG_ON(hinode->hi_notify);
-+ hinode->hi_notify = hin;
-+ hin->hin_aufs_inode = inode;
-+ inotify_init_watch(&hin->hin_watch);
-+ wd = inotify_add_watch(in_handle, &hin->hin_watch, hidden_inode,
-+ in_mask);
-+ if (wd >= 0)
-+ return 0; /* success */
-+
-+ err = wd;
-+ put_inotify_watch(&hin->hin_watch);
-+ cache_free_hinotify(hin);
-+ hinode->hi_notify = NULL;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+void do_free_hinotify(struct aufs_hinode *hinode)
-+{
-+ int err;
-+ struct aufs_hinotify *hin;
-+
-+ TraceEnter();
-+
-+ hin = hinode->hi_notify;
-+ if (hin) {
-+ err = 0;
-+ if (atomic_read(&hin->hin_watch.count))
-+ err = inotify_rm_watch(in_handle, &hin->hin_watch);
-+
-+ if (!err) {
-+ cache_free_hinotify(hin);
-+ hinode->hi_notify = NULL;
-+ } else
-+ IOErr1("failed inotify_rm_watch() %d\n", err);
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void ctl_hinotify(struct aufs_hinode *hinode, const __u32 mask)
-+{
-+ struct inode *hi;
-+ struct inotify_watch *watch;
-+
-+ hi = hinode->hi_inode;
-+ LKTRTrace("hi%lu, sb %p, 0x%x\n", hi->i_ino, hi->i_sb, mask);
-+ if (0 && !strcmp(current->comm, "link"))
-+ dump_stack();
-+ IMustLock(hi);
-+ if (!hinode->hi_notify)
-+ return;
-+
-+ watch = &hinode->hi_notify->hin_watch;
-+#if 0
-+ {
-+ u32 wd;
-+ wd = inotify_find_update_watch(in_handle, hi, mask);
-+ TraceErr(wd);
-+ // ignore an err;
-+ }
-+#else
-+ watch->mask = mask;
-+ smp_mb();
-+#endif
-+ LKTRTrace("watch %p, mask %u\n", watch, watch->mask);
-+}
-+
-+#define suspend_hinotify(hi) ctl_hinotify(hi, 0)
-+#define resume_hinotify(hi) ctl_hinotify(hi, in_mask)
-+
-+void do_hdir_lock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex,
-+ unsigned int lsc)
-+{
-+ struct aufs_hinode *hinode;
-+
-+ LKTRTrace("i%lu, b%d, lsc %d\n", dir->i_ino, bindex, lsc);
-+ DEBUG_ON(!S_ISDIR(dir->i_mode));
-+ hinode = itoii(dir)->ii_hinode + bindex;
-+ DEBUG_ON(h_dir != hinode->hi_inode);
-+
-+ hi_lock(h_dir, lsc);
-+ if (1 /* unlikely(au_flag_test(dir->i_sb, AuFlag_UDBA_HINOTIFY) */)
-+ suspend_hinotify(hinode);
-+}
-+
-+void hdir_unlock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex)
-+{
-+ struct aufs_hinode *hinode;
-+
-+ LKTRTrace("i%lu, b%d\n", dir->i_ino, bindex);
-+ DEBUG_ON(!S_ISDIR(dir->i_mode));
-+ hinode = itoii(dir)->ii_hinode + bindex;
-+ DEBUG_ON(h_dir != hinode->hi_inode);
-+
-+ if (1 /* unlikely(au_flag_test(dir->i_sb, AuFlag_UDBA_HINOTIFY) */)
-+ resume_hinotify(hinode);
-+ i_unlock(h_dir);
-+}
-+
-+void hdir_lock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir)
-+{
-+ struct aufs_hinode *hinode;
-+
-+ LKTRTrace("%.*s, %.*s\n", DLNPair(h_parents[0]), DLNPair(h_parents[1]));
-+
-+ vfsub_lock_rename(h_parents[0], h_parents[1]);
-+ hinode = itoii(dirs[0])->ii_hinode + bindex;
-+ DEBUG_ON(h_parents[0]->d_inode != hinode->hi_inode);
-+ suspend_hinotify(hinode);
-+ if (issamedir)
-+ return;
-+ hinode = itoii(dirs[1])->ii_hinode + bindex;
-+ DEBUG_ON(h_parents[1]->d_inode != hinode->hi_inode);
-+ suspend_hinotify(hinode);
-+}
-+
-+void hdir_unlock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir)
-+{
-+ struct aufs_hinode *hinode;
-+
-+ LKTRTrace("%.*s, %.*s\n", DLNPair(h_parents[0]), DLNPair(h_parents[1]));
-+
-+ hinode = itoii(dirs[0])->ii_hinode + bindex;
-+ DEBUG_ON(h_parents[0]->d_inode != hinode->hi_inode);
-+ resume_hinotify(hinode);
-+ if (!issamedir) {
-+ hinode = itoii(dirs[1])->ii_hinode + bindex;
-+ DEBUG_ON(h_parents[1]->d_inode != hinode->hi_inode);
-+ resume_hinotify(hinode);
-+ }
-+ vfsub_unlock_rename(h_parents[0], h_parents[1]);
-+}
-+
-+void au_reset_hinotify(struct inode *inode, unsigned int flags)
-+{
-+ aufs_bindex_t bindex, bend;
-+ struct inode *hi;
-+
-+ LKTRTrace("i%lu, 0x%x\n", inode->i_ino, flags);
-+
-+ bend = ibend(inode);
-+ for (bindex = ibstart(inode); bindex <= bend; bindex++) {
-+ hi = au_h_iptr_i(inode, bindex);
-+ if (hi) {
-+ //hi_lock(hi, AUFS_LSC_H_CHILD);
-+ igrab(hi);
-+ set_h_iptr(inode, bindex, NULL, 0);
-+ set_h_iptr(inode, bindex, igrab(hi), flags);
-+ iput(hi);
-+ //i_unlock(hi);
-+ }
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+static char *in_name(u32 mask)
-+{
-+#define test_ret(flag) if (mask & flag) return #flag;
-+ test_ret(IN_ACCESS);
-+ test_ret(IN_MODIFY);
-+ test_ret(IN_ATTRIB);
-+ test_ret(IN_CLOSE_WRITE);
-+ test_ret(IN_CLOSE_NOWRITE);
-+ test_ret(IN_OPEN);
-+ test_ret(IN_MOVED_FROM);
-+ test_ret(IN_MOVED_TO);
-+ test_ret(IN_CREATE);
-+ test_ret(IN_DELETE);
-+ test_ret(IN_DELETE_SELF);
-+ test_ret(IN_MOVE_SELF);
-+ test_ret(IN_UNMOUNT);
-+ test_ret(IN_Q_OVERFLOW);
-+ test_ret(IN_IGNORED);
-+ return "";
-+#undef test_ret
-+}
-+#else
-+#define in_name(m) "??"
-+#endif
-+
-+static int dec_gen_by_name(struct inode *dir, const char *_name, u32 mask)
-+{
-+ int err;
-+ struct dentry *parent, *child;
-+ struct inode *inode;
-+ struct qstr *dname;
-+ char *name = (void*)_name;
-+ unsigned int len;
-+
-+ LKTRTrace("i%lu, %s, 0x%x %s\n",
-+ dir->i_ino, name, mask, in_name(mask));
-+
-+ err = -1;
-+ parent = d_find_alias(dir);
-+ if (unlikely(!parent))
-+ goto out;
-+
-+#if 0
-+ if (unlikely(!memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)))
-+ name += AUFS_WH_PFX_LEN;
-+#endif
-+ len = strlen(name);
-+ spin_lock(&dcache_lock);
-+ list_for_each_entry(child, &parent->d_subdirs, d_u.d_child) {
-+ dname = &child->d_name;
-+ if (len == dname->len && !memcmp(dname->name, name, len)) {
-+ au_digen_dec(child);
-+#if 1
-+ //todo: why both are needed
-+ if (mask & IN_MOVE) {
-+ spin_lock(&child->d_lock);
-+ __d_drop(child);
-+ spin_unlock(&child->d_lock);
-+ }
-+#endif
-+
-+ inode = child->d_inode;
-+ if (inode)
-+ au_iigen_dec(inode);
-+ err = !!inode;
-+
-+ // todo: the i_nlink of newly created name by link(2)
-+ // should be updated
-+ // todo: some nfs dentry doesn't notified at deleteing
-+ break;
-+ }
-+ }
-+ spin_unlock(&dcache_lock);
-+ dput(parent);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct postproc_args {
-+ struct inode *h_dir, *dir, *h_child_inode;
-+ char *h_child_name;
-+ u32 mask;
-+};
-+
-+static void dec_gen_by_ino(struct postproc_args *a)
-+{
-+ struct super_block *sb;
-+ aufs_bindex_t bindex, bend, bfound;
-+ struct xino xino;
-+ struct inode *cinode;
-+
-+ TraceEnter();
-+
-+ sb = a->dir->i_sb;
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_XINO));
-+
-+ bfound = -1;
-+ bend = ibend(a->dir);
-+ for (bindex = ibstart(a->dir); bfound == -1 && bindex <= bend; bindex++)
-+ if (au_h_iptr_i(a->dir, bindex) == a->h_dir)
-+ bfound = bindex;
-+ if (bfound < 0)
-+ return;
-+
-+ bindex = find_brindex(sb, itoii(a->dir)->ii_hinode[bfound + 0].hi_id);
-+ if (bindex < 0)
-+ return;
-+ if (unlikely(xino_read(sb, bindex, a->h_child_inode->i_ino, &xino)))
-+ return;
-+ cinode = NULL;
-+ if (xino.ino)
-+ cinode = ilookup(sb, xino.ino);
-+ if (cinode) {
-+#if 1
-+ if (1 || a->mask & IN_MOVE) {
-+ struct dentry *child;
-+ spin_lock(&dcache_lock);
-+ list_for_each_entry(child, &cinode->i_dentry, d_alias)
-+ au_digen_dec(child);
-+ spin_unlock(&dcache_lock);
-+ }
-+#endif
-+ au_iigen_dec(cinode);
-+ iput(cinode);
-+ }
-+}
-+
-+static void reset_ino(struct postproc_args *a)
-+{
-+ aufs_bindex_t bindex, bend;
-+ struct super_block *sb;
-+ struct inode *h_dir;
-+
-+ sb = a->dir->i_sb;
-+ bend = ibend(a->dir);
-+ for (bindex = ibstart(a->dir); bindex <= bend; bindex++) {
-+ h_dir = au_h_iptr_i(a->dir, bindex);
-+ if (h_dir && h_dir != a->h_dir)
-+ xino_write0(sb, bindex, h_dir->i_ino);
-+ /* ignore this error */
-+ }
-+}
-+
-+static void postproc(void *args)
-+{
-+ struct postproc_args *a = args;
-+ struct super_block *sb;
-+ struct aufs_vdir *vdir;
-+
-+ //au_debug_on();
-+ LKTRTrace("mask 0x%x %s, i%lu, hi%lu, hci%lu\n",
-+ a->mask, in_name(a->mask), a->dir->i_ino, a->h_dir->i_ino,
-+ a->h_child_inode ? a->h_child_inode->i_ino : 0);
-+ DEBUG_ON(!a->dir);
-+#if 0//def ForceInotify
-+ Dbg("mask 0x%x %s, i%lu, hi%lu, hci%lu\n",
-+ a->mask, in_name(a->mask), a->dir->i_ino, a->h_dir->i_ino,
-+ a->h_child_inode ? a->h_child_inode->i_ino : 0);
-+#endif
-+
-+ i_lock(a->dir);
-+ sb = a->dir->i_sb;
-+ si_read_lock(sb); // consider write_lock
-+ ii_write_lock_parent(a->dir);
-+
-+ /* make dir entries obsolete */
-+ vdir = ivdir(a->dir);
-+ if (vdir)
-+ vdir->vd_jiffy = 0;
-+ a->dir->i_version++;
-+
-+ /*
-+ * special handling root directory,
-+ * sine d_revalidate may not be called later.
-+ * main purpose is maintaining i_nlink.
-+ */
-+ if (unlikely(a->dir->i_ino == AUFS_ROOT_INO))
-+ au_cpup_attr_all(a->dir);
-+
-+ if (a->h_child_inode && au_flag_test(sb, AuFlag_XINO))
-+ dec_gen_by_ino(a);
-+ else if (a->mask & (IN_MOVE_SELF | IN_DELETE_SELF))
-+ reset_ino(a);
-+
-+ ii_write_unlock(a->dir);
-+ si_read_unlock(sb);
-+ i_unlock(a->dir);
-+
-+ au_mntput(a->dir->i_sb);
-+ iput(a->h_child_inode);
-+ iput(a->h_dir);
-+ iput(a->dir);
-+#if 0
-+ if (atomic_dec_and_test(&stosi(sb)->si_hinotify))
-+ wake_up_all(&stosi(sb)->si_hinotify_wq);
-+#endif
-+ kfree(a);
-+ //au_debug_off();
-+}
-+
-+static void aufs_inotify(struct inotify_watch *watch, u32 wd, u32 mask,
-+ u32 cookie, const char *h_child_name,
-+ struct inode *h_child_inode)
-+{
-+ struct aufs_hinotify *hinotify;
-+ struct postproc_args *args;
-+ int len;
-+ char *p;
-+ struct inode *dir;
-+ //static DECLARE_WAIT_QUEUE_HEAD(wq);
-+
-+ //au_debug_on();
-+ LKTRTrace("i%lu, wd %d, mask 0x%x %s, cookie 0x%x, hcname %s, hi%lu\n",
-+ watch->inode->i_ino, wd, mask, in_name(mask), cookie,
-+ h_child_name ? h_child_name : "",
-+ h_child_inode ? h_child_inode->i_ino : 0);
-+ //au_debug_off();
-+ //IMustLock(h_dir);
-+#if 0 //defined(ForceInotify) || defined(DbgInotify)
-+ Dbg("i%lu, wd %d, mask 0x%x %s, cookie 0x%x, hcname %s, hi%lu\n",
-+ watch->inode->i_ino, wd, mask, in_name(mask), cookie,
-+ h_child_name ? h_child_name : "",
-+ h_child_inode ? h_child_inode->i_ino : 0);
-+#endif
-+ /* if IN_UNMOUNT happens, there must be another bug */
-+ if (mask & (IN_IGNORED | IN_UNMOUNT)) {
-+ put_inotify_watch(watch);
-+ return;
-+ }
-+
-+ switch (mask & IN_ALL_EVENTS) {
-+ case IN_MODIFY:
-+ case IN_ATTRIB:
-+ if (h_child_name)
-+ return;
-+ break;
-+
-+ case IN_MOVED_FROM:
-+ case IN_MOVED_TO:
-+ case IN_CREATE:
-+ DEBUG_ON(!h_child_name || !h_child_inode);
-+ break;
-+ case IN_DELETE:
-+ /*
-+ * aufs never be able to get this child inode.
-+ * revalidation should be in d_revalide()
-+ * by checking i_nlink, i_generation or d_unhashed().
-+ */
-+ DEBUG_ON(!h_child_name);
-+ break;
-+
-+ case IN_DELETE_SELF:
-+ case IN_MOVE_SELF:
-+ DEBUG_ON(h_child_name || h_child_inode);
-+ break;
-+
-+ case IN_ACCESS:
-+ default:
-+ DEBUG_ON(1);
-+ }
-+
-+#ifdef DbgInotify
-+ WARN_ON(1);
-+#endif
-+
-+ /* iput() will be called in postproc() */
-+ hinotify = container_of(watch, struct aufs_hinotify, hin_watch);
-+ DEBUG_ON(!hinotify || !hinotify->hin_aufs_inode);
-+ dir = hinotify->hin_aufs_inode;
-+
-+ /* force re-lookup in next d_revalidate() */
-+ if (dir->i_ino != AUFS_ROOT_INO)
-+ au_iigen_dec(dir);
-+ len = 0;
-+ if (h_child_name && dec_gen_by_name(dir, h_child_name, mask))
-+ len = strlen(h_child_name);
-+
-+ //wait_event(wq, (args = kmalloc(sizeof(*args), GFP_KERNEL)));
-+ args = kmalloc(sizeof(*args) + len + 1, GFP_KERNEL);
-+ if (unlikely(!args)) {
-+ Err("no memory\n");
-+ return;
-+ }
-+ args->mask = mask;
-+ args->dir = igrab(dir);
-+ args->h_dir = igrab(watch->inode);
-+ args->h_child_inode = NULL;
-+ if (len) {
-+ if (h_child_inode)
-+ args->h_child_inode = igrab(h_child_inode);
-+ p = (void*)args;
-+ args->h_child_name = p + sizeof(*args);
-+ memcpy(args->h_child_name, h_child_name, len + 1);
-+ }
-+ //atomic_inc(&stosi(args->dir->i_sb)->si_hinotify);
-+ /* prohibit umount */
-+ au_mntget(args->dir->i_sb);
-+ au_wkq_nowait(postproc, args, /*dlgt*/0);
-+}
-+
-+#if 0
-+void hinotify_flush(struct super_block *sb)
-+{
-+ atomic_t *p = &stosi(sb)->si_hinotify;
-+ wait_event(stosi(sb)->si_hinotify_wq, !atomic_read(p));
-+}
-+#endif
-+
-+static void aufs_inotify_destroy(struct inotify_watch *watch)
-+{
-+ return;
-+}
-+
-+static struct inotify_operations aufs_inotify_ops = {
-+ .handle_event = aufs_inotify,
-+ .destroy_watch = aufs_inotify_destroy
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int __init au_inotify_init(void)
-+{
-+ in_handle = inotify_init(&aufs_inotify_ops);
-+ if (!IS_ERR(in_handle))
-+ return 0;
-+ TraceErrPtr(in_handle);
-+ return PTR_ERR(in_handle);
-+}
-+
-+void au_inotify_fin(void)
-+{
-+ inotify_destroy(in_handle);
-+}
-diff --git a/fs/aufs/i_op.c b/fs/aufs/i_op.c
-new file mode 100755
-index 0000000..1cd0453
---- /dev/null
-+++ b/fs/aufs/i_op.c
-@@ -0,0 +1,641 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: i_op.c,v 1.30 2007/04/23 00:55:05 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include <linux/security.h>
-+#include <asm/uaccess.h>
-+#include "aufs.h"
-+
-+#ifdef CONFIG_AUFS_DLGT
-+struct security_inode_permission_args {
-+ int *errp;
-+ struct inode *h_inode;
-+ int mask;
-+ struct nameidata *fake_nd;
-+};
-+
-+static void call_security_inode_permission(void *args)
-+{
-+ struct security_inode_permission_args *a = args;
-+ LKTRTrace("fsuid %d\n", current->fsuid);
-+ *a->errp = security_inode_permission(a->h_inode, a->mask, a->fake_nd);
-+}
-+#endif
-+
-+static int hidden_permission(struct inode *hidden_inode, int mask,
-+ struct nameidata *fake_nd, int brperm, int dlgt)
-+{
-+ int err, submask;
-+ const int write_mask = (mask & (MAY_WRITE | MAY_APPEND));
-+
-+ LKTRTrace("ino %lu, mask 0x%x, brperm 0x%x\n",
-+ hidden_inode->i_ino, mask, brperm);
-+
-+ err = -EACCES;
-+ if (unlikely(write_mask && IS_IMMUTABLE(hidden_inode)))
-+ goto out;
-+
-+ /* skip hidden fs test in the case of write to ro branch */
-+ submask = mask & ~MAY_APPEND;
-+ if (unlikely((write_mask && !br_writable(brperm))
-+ || !hidden_inode->i_op
-+ || !hidden_inode->i_op->permission)) {
-+ //LKTRLabel(generic_permission);
-+ err = generic_permission(hidden_inode, submask, NULL);
-+ } else {
-+ //LKTRLabel(h_inode->permission);
-+ err = hidden_inode->i_op->permission(hidden_inode, submask,
-+ fake_nd);
-+ TraceErr(err);
-+ }
-+
-+#if 1
-+ if (!err) {
-+#ifndef CONFIG_AUFS_DLGT
-+ err = security_inode_permission(hidden_inode, mask, fake_nd);
-+#else
-+ if (!dlgt)
-+ err = security_inode_permission(hidden_inode, mask,
-+ fake_nd);
-+ else {
-+ struct security_inode_permission_args args = {
-+ .errp = &err,
-+ .h_inode = hidden_inode,
-+ .mask = mask,
-+ .fake_nd = fake_nd
-+ };
-+ au_wkq_wait(call_security_inode_permission, &args,
-+ /*dlgt*/1);
-+ }
-+#endif
-+ }
-+#endif
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int silly_lock(struct inode *inode, struct nameidata *nd)
-+{
-+ int locked = 0;
-+ struct super_block *sb = inode->i_sb;
-+
-+ LKTRTrace("i%lu, nd %p\n", inode->i_ino, nd);
-+
-+#ifdef CONFIG_AUFS_FAKE_DM
-+ si_read_lock(sb);
-+ ii_read_lock_child(inode);
-+#else
-+ if (!nd || !nd->dentry) {
-+ si_read_lock(sb);
-+ ii_read_lock_child(inode);
-+ } else if (nd->dentry->d_inode != inode) {
-+ locked = 1;
-+ /* lock child first, then parent */
-+ si_read_lock(sb);
-+ ii_read_lock_child(inode);
-+ di_read_lock_parent(nd->dentry, 0);
-+ } else {
-+ locked = 2;
-+ aufs_read_lock(nd->dentry, AUFS_I_RLOCK);
-+ }
-+#endif
-+ return locked;
-+}
-+
-+static void silly_unlock(int locked, struct inode *inode, struct nameidata *nd)
-+{
-+ struct super_block *sb = inode->i_sb;
-+
-+ LKTRTrace("locked %d, i%lu, nd %p\n", locked, inode->i_ino, nd);
-+
-+#ifdef CONFIG_AUFS_FAKE_DM
-+ ii_read_unlock(inode);
-+ si_read_unlock(sb);
-+#else
-+ switch (locked) {
-+ case 0:
-+ ii_read_unlock(inode);
-+ si_read_unlock(sb);
-+ break;
-+ case 1:
-+ di_read_unlock(nd->dentry, 0);
-+ ii_read_unlock(inode);
-+ si_read_unlock(sb);
-+ break;
-+ case 2:
-+ aufs_read_unlock(nd->dentry, AUFS_I_RLOCK);
-+ break;
-+ default:
-+ BUG();
-+ }
-+#endif
-+}
-+
-+static int aufs_permission(struct inode *inode, int mask, struct nameidata *nd)
-+{
-+ int err, locked, dlgt;
-+ aufs_bindex_t bindex, bend;
-+ struct inode *hidden_inode;
-+ struct super_block *sb;
-+ struct nameidata fake_nd, *p;
-+ const int write_mask = (mask & (MAY_WRITE | MAY_APPEND));
-+ const int nondir = !S_ISDIR(inode->i_mode);
-+
-+ LKTRTrace("ino %lu, mask 0x%x, nondir %d, write_mask %d, "
-+ "nd %p{%p, %p}\n",
-+ inode->i_ino, mask, nondir, write_mask,
-+ nd, nd ? nd->dentry : NULL, nd ? nd->mnt : NULL);
-+
-+ sb = inode->i_sb;
-+ locked = silly_lock(inode, nd);
-+ dlgt = need_dlgt(sb);
-+
-+ if (nd)
-+ fake_nd = *nd;
-+ if (/* unlikely */(nondir || write_mask)) {
-+ hidden_inode = au_h_iptr(inode);
-+ DEBUG_ON(!hidden_inode
-+ || ((hidden_inode->i_mode & S_IFMT)
-+ != (inode->i_mode & S_IFMT)));
-+ err = 0;
-+ bindex = ibstart(inode);
-+ p = fake_dm(&fake_nd, nd, sb, bindex);
-+ /* actual test will be delegated to LSM */
-+ if (IS_ERR(p))
-+ DEBUG_ON(PTR_ERR(p) != -ENOENT);
-+ else {
-+ err = hidden_permission(hidden_inode, mask, p,
-+ sbr_perm(sb, bindex), dlgt);
-+ fake_dm_release(p);
-+ }
-+ if (write_mask && !err) {
-+ err = find_rw_br(sb, bindex);
-+ if (err >= 0)
-+ err = 0;
-+ }
-+ goto out;
-+ }
-+
-+ /* non-write to dir */
-+ err = 0;
-+ bend = ibend(inode);
-+ for (bindex = ibstart(inode); !err && bindex <= bend; bindex++) {
-+ hidden_inode = au_h_iptr_i(inode, bindex);
-+ if (!hidden_inode)
-+ continue;
-+ DEBUG_ON(!S_ISDIR(hidden_inode->i_mode));
-+
-+ p = fake_dm(&fake_nd, nd, sb, bindex);
-+ /* actual test will be delegated to LSM */
-+ if (IS_ERR(p))
-+ DEBUG_ON(PTR_ERR(p) != -ENOENT);
-+ else {
-+ err = hidden_permission(hidden_inode, mask, p,
-+ sbr_perm(sb, bindex), dlgt);
-+ fake_dm_release(p);
-+ }
-+ }
-+
-+ out:
-+ silly_unlock(locked, inode, nd);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static struct dentry *aufs_lookup(struct inode *dir, struct dentry *dentry,
-+ struct nameidata *nd)
-+{
-+ struct dentry *ret, *parent;
-+ int err, npositive;
-+ struct inode *inode;
-+
-+ LKTRTrace("dir %lu, %.*s\n", dir->i_ino, DLNPair(dentry));
-+ DEBUG_ON(IS_ROOT(dentry));
-+ IMustLock(dir);
-+
-+ parent = dentry->d_parent; // dget_parent()
-+ aufs_read_lock(parent, !AUFS_I_RLOCK);
-+ err = au_alloc_dinfo(dentry);
-+ //if (LktrCond) err = -1;
-+ ret = ERR_PTR(err);
-+ if (unlikely(err))
-+ goto out;
-+
-+ err = npositive = lkup_dentry(dentry, dbstart(parent), /*type*/0);
-+ //err = -1;
-+ ret = ERR_PTR(err);
-+ if (unlikely(err < 0))
-+ goto out_unlock;
-+ inode = NULL;
-+ if (npositive) {
-+ inode = au_new_inode(dentry);
-+ ret = (void*)inode;
-+ }
-+ if (!IS_ERR(inode)) {
-+#if 1
-+ /* d_splice_alias() also supports d_add() */
-+ ret = d_splice_alias(inode, dentry);
-+ if (unlikely(IS_ERR(ret) && inode))
-+ ii_write_unlock(inode);
-+#else
-+ d_add(dentry, inode);
-+#endif
-+ }
-+
-+ out_unlock:
-+ di_write_unlock(dentry);
-+ out:
-+ aufs_read_unlock(parent, !AUFS_I_RLOCK);
-+ TraceErrPtr(ret);
-+ return ret;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * decide the branch and the parent dir where we will create a new entry.
-+ * returns new bindex or an error.
-+ * copyup the parent dir if needed.
-+ */
-+int wr_dir(struct dentry *dentry, int add_entry, struct dentry *src_dentry,
-+ aufs_bindex_t force_btgt, int do_lock_srcdir)
-+{
-+ int err;
-+ aufs_bindex_t bcpup, bstart, src_bstart;
-+ struct dentry *hidden_parent;
-+ struct super_block *sb;
-+ struct dentry *parent, *src_parent = NULL;
-+ struct inode *dir, *src_dir = NULL;
-+
-+ LKTRTrace("%.*s, add %d, src %p, force %d, lock_srcdir %d\n",
-+ DLNPair(dentry), add_entry, src_dentry, force_btgt,
-+ do_lock_srcdir);
-+
-+ sb = dentry->d_sb;
-+ parent = dentry->d_parent; // dget_parent()
-+ bcpup = bstart = dbstart(dentry);
-+ if (force_btgt < 0) {
-+ if (src_dentry) {
-+ src_bstart = dbstart(src_dentry);
-+ if (src_bstart < bstart)
-+ bcpup = src_bstart;
-+ }
-+ if (test_ro(sb, bcpup, dentry->d_inode)) {
-+ if (!add_entry)
-+ di_read_lock_parent(parent, !AUFS_I_RLOCK);
-+ bcpup = err = find_rw_parent_br(dentry, bcpup);
-+ //bcpup = err = find_rw_br(sb, bcpup);
-+ if (!add_entry)
-+ di_read_unlock(parent, !AUFS_I_RLOCK);
-+ //err = -1;
-+ if (unlikely(err < 0))
-+ goto out;
-+ }
-+ } else {
-+ DEBUG_ON(bstart <= force_btgt
-+ || test_ro(sb, force_btgt, dentry->d_inode));
-+ bcpup = force_btgt;
-+ }
-+ LKTRTrace("bstart %d, bcpup %d\n", bstart, bcpup);
-+
-+ err = bcpup;
-+ if (bcpup == bstart)
-+ goto out; /* success */
-+
-+ /* copyup the new parent into the branch we process */
-+ hidden_parent = au_h_dptr(dentry)->d_parent; // dget_parent()
-+ if (src_dentry) {
-+ src_parent = src_dentry->d_parent; // dget_parent()
-+ src_dir = src_parent->d_inode;
-+ if (do_lock_srcdir)
-+ di_write_lock_parent2(src_parent);
-+ }
-+
-+ dir = parent->d_inode;
-+ if (add_entry) {
-+ au_update_dbstart(dentry);
-+ IMustLock(dir);
-+ DiMustWriteLock(parent);
-+ IiMustWriteLock(dir);
-+ } else
-+ di_write_lock_parent(parent);
-+
-+ err = 0;
-+ if (!au_h_dptr_i(parent, bcpup))
-+ err = cpup_dirs(dentry, bcpup, src_parent);
-+ //err = -1;
-+ if (!err && add_entry) {
-+ hidden_parent = au_h_dptr_i(parent, bcpup);
-+ DEBUG_ON(!hidden_parent || !hidden_parent->d_inode);
-+ hi_lock_parent(hidden_parent->d_inode);
-+ err = lkup_neg(dentry, bcpup);
-+ //err = -1;
-+ i_unlock(hidden_parent->d_inode);
-+ }
-+
-+ if (!add_entry)
-+ di_write_unlock(parent);
-+ if (do_lock_srcdir)
-+ di_write_unlock(src_parent);
-+ if (!err)
-+ err = bcpup; /* success */
-+ //err = -EPERM;
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int aufs_setattr(struct dentry *dentry, struct iattr *ia)
-+{
-+ int err, isdir;
-+ aufs_bindex_t bstart, bcpup;
-+ struct inode *hidden_inode, *inode, *dir, *h_dir, *gh_dir, *gdir;
-+ struct dentry *hidden_dentry, *parent;
-+ unsigned int udba;
-+
-+ LKTRTrace("%.*s, ia_valid 0x%x\n", DLNPair(dentry), ia->ia_valid);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ bstart = dbstart(dentry);
-+ bcpup = err = wr_dir(dentry, /*add*/0, /*src_dentry*/NULL,
-+ /*force_btgt*/-1, /*do_lock_srcdir*/0);
-+ //err = -1;
-+ if (unlikely(err < 0))
-+ goto out;
-+
-+ /* crazy udba locks */
-+ udba = au_flag_test(dentry->d_sb, AuFlag_UDBA_INOTIFY);
-+ parent = NULL;
-+ gdir = gh_dir = dir = h_dir = NULL;
-+ if ((udba || bstart != bcpup) && !IS_ROOT(dentry)) {
-+ parent = dentry->d_parent; // dget_parent()
-+ dir = parent->d_inode;
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ h_dir = au_h_iptr_i(dir, bcpup);
-+ }
-+ if (parent) {
-+ if (unlikely(udba && !IS_ROOT(parent))) {
-+ gdir = parent->d_parent->d_inode; // dget_parent()
-+ ii_read_lock_parent2(gdir);
-+ gh_dir = au_h_iptr_i(gdir, bcpup);
-+ hgdir_lock(gh_dir, gdir, bcpup);
-+ }
-+ hdir_lock(h_dir, dir, bcpup);
-+ }
-+
-+ isdir = S_ISDIR(inode->i_mode);
-+ hidden_dentry = au_h_dptr(dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+
-+#define HiLock(bindex) do {\
-+ if (!isdir) \
-+ hi_lock_child(hidden_inode); \
-+ else \
-+ hdir2_lock(hidden_inode, inode, bindex); \
-+ } while (0)
-+#define HiUnlock(bindex) do {\
-+ if (!isdir) \
-+ i_unlock(hidden_inode); \
-+ else \
-+ hdir_unlock(hidden_inode, inode, bindex); \
-+ } while (0)
-+
-+ if (bstart != bcpup) {
-+ loff_t size = -1;
-+
-+ if ((ia->ia_valid & ATTR_SIZE)
-+ && ia->ia_size < i_size_read(inode)) {
-+ size = ia->ia_size;
-+ ia->ia_valid &= ~ATTR_SIZE;
-+ }
-+ HiLock(bstart);
-+ err = sio_cpup_simple(dentry, bcpup, size,
-+ au_flags_cpup(CPUP_DTIME, parent));
-+ //err = -1;
-+ HiUnlock(bstart);
-+ if (unlikely(err || !ia->ia_valid))
-+ goto out_unlock;
-+
-+ hidden_dentry = au_h_dptr(dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+ }
-+
-+ HiLock(bcpup);
-+ err = vfsub_notify_change(hidden_dentry, ia, need_dlgt(dentry->d_sb));
-+ //err = -1;
-+ if (!err)
-+ au_cpup_attr_changable(inode);
-+ HiUnlock(bcpup);
-+#undef HiLock
-+#undef HiUnlock
-+
-+ out_unlock:
-+ if (parent) {
-+ hdir_unlock(h_dir, dir, bcpup);
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ }
-+ if (unlikely(gdir)) {
-+ hdir_unlock(gh_dir, gdir, bcpup);
-+ ii_read_unlock(gdir);
-+ }
-+ out:
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int hidden_readlink(struct dentry *dentry, int bindex,
-+ char __user * buf, int bufsiz)
-+{
-+ struct super_block *sb;
-+ struct dentry *hidden_dentry;
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (unlikely(!hidden_dentry->d_inode->i_op
-+ || !hidden_dentry->d_inode->i_op->readlink))
-+ return -EINVAL;
-+
-+ sb = dentry->d_sb;
-+ if (!test_ro(sb, bindex, dentry->d_inode)) {
-+ touch_atime(sbr_mnt(sb, bindex), hidden_dentry);
-+ dentry->d_inode->i_atime = hidden_dentry->d_inode->i_atime;
-+ }
-+ return hidden_dentry->d_inode->i_op->readlink
-+ (hidden_dentry, buf, bufsiz);
-+}
-+
-+static int aufs_readlink(struct dentry *dentry, char __user * buf, int bufsiz)
-+{
-+ int err;
-+
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), bufsiz);
-+
-+ aufs_read_lock(dentry, AUFS_I_RLOCK);
-+ err = hidden_readlink(dentry, dbstart(dentry), buf, bufsiz);
-+ //err = -1;
-+ aufs_read_unlock(dentry, AUFS_I_RLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static void *aufs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ int err;
-+ char *buf;
-+ mm_segment_t old_fs;
-+
-+ LKTRTrace("%.*s, nd %.*s\n", DLNPair(dentry), DLNPair(nd->dentry));
-+
-+ err = -ENOMEM;
-+ buf = __getname();
-+ //buf = NULL;
-+ if (unlikely(!buf))
-+ goto out;
-+
-+ aufs_read_lock(dentry, AUFS_I_RLOCK);
-+ old_fs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = hidden_readlink(dentry, dbstart(dentry), (char __user *)buf,
-+ PATH_MAX);
-+ //err = -1;
-+ set_fs(old_fs);
-+ aufs_read_unlock(dentry, AUFS_I_RLOCK);
-+
-+ if (err >= 0) {
-+ buf[err] = 0;
-+ /* will be freed by put_link */
-+ nd_set_link(nd, buf);
-+ return NULL; /* success */
-+ }
-+ __putname(buf);
-+
-+ out:
-+ path_release(nd);
-+ TraceErr(err);
-+ return ERR_PTR(err);
-+}
-+
-+static void aufs_put_link(struct dentry *dentry, struct nameidata *nd,
-+ void *cookie)
-+{
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ __putname(nd_get_link(nd));
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+#if 0 // comment
-+struct inode_operations {
-+ int (*create) (struct inode *,struct dentry *,int, struct nameidata *);
-+ struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
-+ int (*link) (struct dentry *,struct inode *,struct dentry *);
-+ int (*unlink) (struct inode *,struct dentry *);
-+ int (*symlink) (struct inode *,struct dentry *,const char *);
-+ int (*mkdir) (struct inode *,struct dentry *,int);
-+ int (*rmdir) (struct inode *,struct dentry *);
-+ int (*mknod) (struct inode *,struct dentry *,int,dev_t);
-+ int (*rename) (struct inode *, struct dentry *,
-+ struct inode *, struct dentry *);
-+ int (*readlink) (struct dentry *, char __user *,int);
-+ void * (*follow_link) (struct dentry *, struct nameidata *);
-+ void (*put_link) (struct dentry *, struct nameidata *, void *);
-+ void (*truncate) (struct inode *);
-+ int (*permission) (struct inode *, int, struct nameidata *);
-+ int (*setattr) (struct dentry *, struct iattr *);
-+ int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
-+ int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
-+ ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
-+ ssize_t (*listxattr) (struct dentry *, char *, size_t);
-+ int (*removexattr) (struct dentry *, const char *);
-+ void (*truncate_range)(struct inode *, loff_t, loff_t);
-+};
-+#endif
-+
-+struct inode_operations aufs_symlink_iop = {
-+ .permission = aufs_permission,
-+ .setattr = aufs_setattr,
-+
-+ .readlink = aufs_readlink,
-+ .follow_link = aufs_follow_link,
-+ .put_link = aufs_put_link
-+};
-+
-+//i_op_add.c
-+int aufs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev);
-+int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname);
-+int aufs_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd);
-+int aufs_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry);
-+int aufs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
-+
-+//i_op_del.c
-+int aufs_unlink(struct inode *dir, struct dentry *dentry);
-+int aufs_rmdir(struct inode *dir, struct dentry *dentry);
-+
-+// i_op_ren.c
-+int aufs_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry);
-+
-+struct inode_operations aufs_dir_iop = {
-+ .create = aufs_create,
-+ .lookup = aufs_lookup,
-+ .link = aufs_link,
-+ .unlink = aufs_unlink,
-+ .symlink = aufs_symlink,
-+ .mkdir = aufs_mkdir,
-+ .rmdir = aufs_rmdir,
-+ .mknod = aufs_mknod,
-+ .rename = aufs_rename,
-+
-+ .permission = aufs_permission,
-+ .setattr = aufs_setattr,
-+
-+#if 0 // xattr
-+ .setxattr = aufs_setxattr,
-+ .getxattr = aufs_getxattr,
-+ .listxattr = aufs_listxattr,
-+ .removexattr = aufs_removexattr
-+#endif
-+};
-+
-+struct inode_operations aufs_iop = {
-+ .permission = aufs_permission,
-+ .setattr = aufs_setattr,
-+
-+#if 0 // xattr
-+ .setxattr = aufs_setxattr,
-+ .getxattr = aufs_getxattr,
-+ .listxattr = aufs_listxattr,
-+ .removexattr = aufs_removexattr
-+#endif
-+};
-diff --git a/fs/aufs/i_op_add.c b/fs/aufs/i_op_add.c
-new file mode 100755
-index 0000000..977d773
---- /dev/null
-+++ b/fs/aufs/i_op_add.c
-@@ -0,0 +1,621 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: i_op_add.c,v 1.37 2007/05/07 03:46:08 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include "aufs.h"
-+
-+/*
-+ * final procedure of adding a new entry, except link(2).
-+ * remove whiteout, instantiate, copyup the parent dir's times and size
-+ * and update version.
-+ * if it failed, re-create the removed whiteout.
-+ */
-+static int epilog(struct dentry *wh_dentry, struct dentry *dentry)
-+{
-+ int err, rerr;
-+ aufs_bindex_t bwh;
-+ struct inode *inode, *dir;
-+ struct dentry *wh;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("wh %p, %.*s\n", wh_dentry, DLNPair(dentry));
-+
-+ lkup.dlgt = need_dlgt(dentry->d_sb);
-+ bwh = -1;
-+ if (wh_dentry) {
-+ bwh = dbwh(dentry);
-+ err = au_unlink_wh_dentry(wh_dentry->d_parent->d_inode,
-+ wh_dentry, dentry, lkup.dlgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+ }
-+
-+ inode = au_new_inode(dentry);
-+ //inode = ERR_PTR(-1);
-+ if (!IS_ERR(inode)) {
-+ d_instantiate(dentry, inode);
-+ dir = dentry->d_parent->d_inode;
-+ /* or always cpup dir mtime? */
-+ if (ibstart(dir) == dbstart(dentry))
-+ au_cpup_attr_timesizes(dir);
-+ dir->i_version++;
-+ return 0; /* success */
-+ }
-+
-+ err = PTR_ERR(inode);
-+ if (!wh_dentry)
-+ goto out;
-+
-+ /* revert */
-+ lkup.nfsmnt = au_nfsmnt(dentry->d_sb, bwh);
-+ wh = simple_create_wh(dentry, bwh, wh_dentry->d_parent, &lkup);
-+ //wh = ERR_PTR(-1);
-+ rerr = PTR_ERR(wh);
-+ if (!IS_ERR(wh)) {
-+ dput(wh);
-+ goto out;
-+ }
-+ IOErr("%.*s reverting whiteout failed(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * initial procedure of adding a new entry.
-+ * prepare writable branch and the parent dir, lock it,
-+ * lookup whiteout for the new entry.
-+ */
-+static struct dentry *
-+lock_hdir_lkup_wh(struct dentry *dentry, struct dtime *dt,
-+ struct dentry *src_dentry, int do_lock_srcdir)
-+{
-+ struct dentry *wh_dentry, *parent, *hidden_parent;
-+ int err;
-+ aufs_bindex_t bstart, bcpup;
-+ struct inode *dir, *h_dir;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, src %p\n", DLNPair(dentry), src_dentry);
-+
-+ parent = dentry->d_parent;
-+ bstart = dbstart(dentry);
-+ bcpup = err = wr_dir(dentry, 1, src_dentry, -1, do_lock_srcdir);
-+ //err = -1;
-+ wh_dentry = ERR_PTR(err);
-+ if (unlikely(err < 0))
-+ goto out;
-+
-+ dir = parent->d_inode;
-+ hidden_parent = au_h_dptr_i(parent, bcpup);
-+ h_dir = hidden_parent->d_inode;
-+ hdir_lock(h_dir, dir, bcpup);
-+ if (dt)
-+ dtime_store(dt, parent, hidden_parent);
-+ if (/* bcpup != bstart || */ bcpup != dbwh(dentry))
-+ return NULL; /* success */
-+
-+ lkup.nfsmnt = au_nfsmnt(parent->d_sb, bcpup);
-+ lkup.dlgt = need_dlgt(parent->d_sb);
-+ wh_dentry = lkup_wh(hidden_parent, &dentry->d_name, &lkup);
-+ //wh_dentry = ERR_PTR(-1);
-+ if (IS_ERR(wh_dentry))
-+ hdir_unlock(h_dir, dir, bcpup);
-+
-+ out:
-+ TraceErrPtr(wh_dentry);
-+ return wh_dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+enum {Mknod, Symlink, Creat};
-+struct simple_arg {
-+ int type;
-+ union {
-+ struct {
-+ int mode;
-+ struct nameidata *nd;
-+ } c;
-+ struct {
-+ const char *symname;
-+ } s;
-+ struct {
-+ int mode;
-+ dev_t dev;
-+ } m;
-+ } u;
-+};
-+
-+static int add_simple(struct inode *dir, struct dentry *dentry,
-+ struct simple_arg *arg)
-+{
-+ int err, dlgt;
-+ struct dentry *hidden_dentry, *hidden_parent, *wh_dentry, *parent;
-+ struct inode *hidden_dir;
-+ struct dtime dt;
-+
-+ LKTRTrace("type %d, %.*s\n", arg->type, DLNPair(dentry));
-+ IMustLock(dir);
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ parent = dentry->d_parent;
-+ di_write_lock_parent(parent);
-+ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, /*src_dentry*/NULL,
-+ /*do_lock_srcdir*/0);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ hidden_dentry = au_h_dptr(dentry);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ dlgt = need_dlgt(dir->i_sb);
-+
-+#if 1 // partial testing
-+ switch (arg->type) {
-+ case Creat:
-+#if 0
-+ if (arg->u.c.nd) {
-+ struct nameidata fake_nd;
-+ fake_nd = *arg->u.c.nd;
-+ fake_nd.dentry = dget(hidden_parent);
-+ fake_nd.mnt = sbr_mnt(dentry->d_sb, dbstart(dentry));
-+ mntget(fake_nd.mnt);
-+ err = vfsub_create(hidden_dir, hidden_dentry,
-+ arg->u.c.mode, &fake_nd, dlgt);
-+ path_release(&fake_nd);
-+ } else
-+#endif
-+ err = vfsub_create(hidden_dir, hidden_dentry,
-+ arg->u.c.mode, NULL, dlgt);
-+ break;
-+ case Symlink:
-+ err = vfsub_symlink(hidden_dir, hidden_dentry,
-+ arg->u.s.symname, S_IALLUGO, dlgt);
-+ break;
-+ case Mknod:
-+ err = vfsub_mknod(hidden_dir, hidden_dentry,
-+ arg->u.m.mode, arg->u.m.dev, dlgt);
-+ break;
-+ default:
-+ BUG();
-+ }
-+#else
-+ err = -1;
-+#endif
-+ if (!err)
-+ err = epilog(wh_dentry, dentry);
-+ //err = -1;
-+
-+ /* revert */
-+ if (unlikely(err && hidden_dentry->d_inode)) {
-+ int rerr;
-+ rerr = vfsub_unlink(hidden_dir, hidden_dentry, dlgt);
-+ //rerr = -1;
-+ if (rerr) {
-+ IOErr("%.*s revert failure(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+ }
-+ dtime_revert(&dt, !CPUP_LOCKED_GHDIR);
-+ d_drop(dentry);
-+ }
-+
-+ hdir_unlock(hidden_dir, dir, dbstart(dentry));
-+ dput(wh_dentry);
-+
-+ out:
-+ if (unlikely(err)) {
-+ au_update_dbstart(dentry);
-+ d_drop(dentry);
-+ }
-+ di_write_unlock(parent);
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
-+{
-+ struct simple_arg arg = {
-+ .type = Mknod,
-+ .u.m = {.mode = mode, .dev = dev}
-+ };
-+ return add_simple(dir, dentry, &arg);
-+}
-+
-+int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
-+{
-+ struct simple_arg arg = {
-+ .type = Symlink,
-+ .u.s.symname = symname
-+ };
-+ return add_simple(dir, dentry, &arg);
-+}
-+
-+int aufs_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd)
-+{
-+ struct simple_arg arg = {
-+ .type = Creat,
-+ .u.c = {.mode = mode, .nd = nd}
-+ };
-+ return add_simple(dir, dentry, &arg);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct link_arg {
-+ aufs_bindex_t bdst, bsrc;
-+ int issamedir, dlgt;
-+ struct dentry *src_parent, *parent, *hidden_dentry;
-+ struct inode *hidden_dir, *inode;
-+};
-+
-+static int cpup_before_link(struct dentry *src_dentry, struct inode *dir,
-+ struct link_arg *a)
-+{
-+ int err;
-+ unsigned int flags;
-+ struct inode *hi, *hdir = NULL, *src_dir;
-+
-+ TraceEnter();
-+
-+ err = 0;
-+ flags = au_flags_cpup(CPUP_DTIME, a->parent);
-+ src_dir = a->src_parent->d_inode;
-+ if (!a->issamedir) {
-+ // todo: dead lock?
-+ di_read_lock_parent2(a->src_parent, AUFS_I_RLOCK);
-+ // this temporary unlock/lock is safe
-+ hdir_unlock(a->hidden_dir, dir, a->bdst);
-+ err = test_and_cpup_dirs(src_dentry, a->bdst, a->parent);
-+ //err = -1;
-+ if (!err) {
-+ hdir = au_h_iptr_i(src_dir, a->bdst);
-+ hdir_lock(hdir, src_dir, a->bdst);
-+ flags = au_flags_cpup(CPUP_DTIME, a->src_parent);
-+ }
-+ }
-+
-+ if (!err) {
-+ hi = au_h_dptr(src_dentry)->d_inode;
-+ hi_lock_child(hi);
-+ err = sio_cpup_simple(src_dentry, a->bdst, -1, flags);
-+ //err = -1;
-+ i_unlock(hi);
-+ }
-+
-+ if (!a->issamedir) {
-+ if (hdir)
-+ hdir_unlock(hdir, src_dir, a->bdst);
-+ hdir_lock(a->hidden_dir, dir, a->bdst);
-+ di_read_unlock(a->src_parent, AUFS_I_RLOCK);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int cpup_or_link(struct dentry *src_dentry, struct link_arg *a)
-+{
-+ int err;
-+ struct inode *inode, *h_inode, *h_dst_inode;
-+ struct dentry *h_dentry;
-+ aufs_bindex_t bstart;
-+ struct super_block *sb;
-+
-+ TraceEnter();
-+
-+ sb = src_dentry->d_sb;
-+ inode = src_dentry->d_inode;
-+ h_dentry = au_h_dptr(src_dentry);
-+ h_inode = h_dentry->d_inode;
-+ bstart = ibstart(inode);
-+ h_dst_inode = NULL;
-+ if (bstart <= a->bdst)
-+ h_dst_inode = au_h_iptr_i(inode, a->bdst);
-+
-+ if (!h_dst_inode) {
-+ /* copyup src_dentry as the name of dentry. */
-+ set_dbstart(src_dentry, a->bdst);
-+ set_h_dptr(src_dentry, a->bdst, dget(a->hidden_dentry));
-+ hi_lock_child(h_inode);
-+ err = sio_cpup_single(src_dentry, a->bdst, a->bsrc, -1,
-+ au_flags_cpup(!CPUP_DTIME, a->parent));
-+ //err = -1;
-+ i_unlock(h_inode);
-+ set_h_dptr(src_dentry, a->bdst, NULL);
-+ set_dbstart(src_dentry, a->bsrc);
-+ } else {
-+ /* the inode of src_dentry already exists on a.bdst branch */
-+ h_dentry = d_find_alias(h_dst_inode);
-+ if (h_dentry) {
-+ err = vfsub_link(h_dentry, a->hidden_dir,
-+ a->hidden_dentry, a->dlgt);
-+ dput(h_dentry);
-+ } else {
-+ IOErr("no dentry found for i%lu on b%d\n",
-+ h_dst_inode->i_ino, a->bdst);
-+ err = -EIO;
-+ }
-+ }
-+
-+ if (!err)
-+ append_plink(sb, a->inode, a->hidden_dentry, a->bdst);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry)
-+{
-+ int err, rerr;
-+ struct dentry *hidden_parent, *wh_dentry, *hidden_src_dentry;
-+ struct dtime dt;
-+ struct link_arg a;
-+ struct super_block *sb;
-+
-+ LKTRTrace("src %.*s, i%lu, dst %.*s\n",
-+ DLNPair(src_dentry), dir->i_ino, DLNPair(dentry));
-+ IMustLock(dir);
-+ IMustLock(src_dentry->d_inode);
-+
-+ aufs_read_and_write_lock2(dentry, src_dentry, /*isdir*/0);
-+ a.src_parent = src_dentry->d_parent;
-+ a.parent = dentry->d_parent;
-+ a.issamedir = (a.src_parent == a.parent);
-+ di_write_lock_parent(a.parent);
-+ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, src_dentry, !a.issamedir);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ a.inode = src_dentry->d_inode;
-+ a.hidden_dentry = au_h_dptr(dentry);
-+ hidden_parent = a.hidden_dentry->d_parent;
-+ a.hidden_dir = hidden_parent->d_inode;
-+ IMustLock(a.hidden_dir);
-+
-+ err = 0;
-+ sb = dentry->d_sb;
-+ a.dlgt = need_dlgt(sb);
-+
-+ //todo: minor optimize, their sb may be same while their bindex differs.
-+ a.bsrc = dbstart(src_dentry);
-+ a.bdst = dbstart(dentry);
-+ hidden_src_dentry = au_h_dptr(src_dentry);
-+ if (unlikely(!au_flag_test(sb, AuFlag_PLINK))) {
-+ /*
-+ * copyup src_dentry to the branch we process,
-+ * and then link(2) to it.
-+ * gave up 'pseudo link by cpup' approach,
-+ * since nlink may be one and some applications will not work.
-+ */
-+ if (a.bdst < a.bsrc
-+ /* && hidden_src_dentry->d_sb != a.hidden_dentry->d_sb */)
-+ err = cpup_before_link(src_dentry, dir, &a);
-+ if (!err) {
-+ hidden_src_dentry = au_h_dptr(src_dentry);
-+ err = vfsub_link(hidden_src_dentry, a.hidden_dir,
-+ a.hidden_dentry, a.dlgt);
-+ //err = -1;
-+ }
-+ } else {
-+ if (a.bdst < a.bsrc
-+ /* && hidden_src_dentry->d_sb != a.hidden_dentry->d_sb */)
-+ err = cpup_or_link(src_dentry, &a);
-+ else {
-+ hidden_src_dentry = au_h_dptr(src_dentry);
-+ err = vfsub_link(hidden_src_dentry, a.hidden_dir,
-+ a.hidden_dentry, a.dlgt);
-+ //err = -1;
-+ }
-+ }
-+ if (unlikely(err))
-+ goto out_unlock;
-+ if (wh_dentry) {
-+ err = au_unlink_wh_dentry(a.hidden_dir, wh_dentry, dentry,
-+ a.dlgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_revert;
-+ }
-+
-+ dir->i_version++;
-+ if (ibstart(dir) == dbstart(dentry))
-+ au_cpup_attr_timesizes(dir);
-+ if (!d_unhashed(a.hidden_dentry)
-+ /* || hidden_old_inode->i_nlink <= nlink */
-+ /* || SB_NFS(hidden_src_dentry->d_sb) */) {
-+ dentry->d_inode = igrab(a.inode);
-+ d_instantiate(dentry, a.inode);
-+ a.inode->i_nlink++;
-+ a.inode->i_ctime = dir->i_ctime;
-+ } else
-+ /* nfs case (< 2.6.15) */
-+ d_drop(dentry);
-+#if 0
-+ au_debug_on();
-+ DbgInode(a.inode);
-+ au_debug_off();
-+ {
-+ aufs_bindex_t i;
-+ for (i = ibstart(a.inode); i <= ibend(a.inode); i++) {
-+ struct xino xino;
-+ struct inode *hi;
-+ hi = au_h_iptr_i(a.inode, i);
-+ if (hi) {
-+ xino_read(sb, i, hi->i_ino, &xino);
-+ Dbg("hi%lu, i%lu\n", hi->i_ino, xino.ino);
-+ }
-+ }
-+ }
-+#endif
-+ goto out_unlock; /* success */
-+
-+ out_revert:
-+#if 0 // remove
-+ if (d_unhashed(a.hidden_dentry)) {
-+ /* hardlink on nfs (< 2.6.15) */
-+ struct dentry *d;
-+ const struct qstr *name = &a.hidden_dentry->d_name;
-+ DEBUG_ON(a.hidden_dentry->d_parent->d_inode != a.hidden_dir);
-+ // do not superio.
-+ d = lkup_one(name->name, a.hidden_dentry->d_parent, name->len,
-+ au_nfsmnt(sb, a.bdst)??, need_dlgt(sb));
-+ rerr = PTR_ERR(d);
-+ if (IS_ERR(d))
-+ goto out_rerr;
-+ dput(a.hidden_dentry);
-+ a.hidden_dentry = d;
-+ DEBUG_ON(!d->d_inode);
-+ }
-+#endif
-+ rerr = vfsub_unlink(a.hidden_dir, a.hidden_dentry, a.dlgt);
-+ //rerr = -1;
-+ if (!rerr)
-+ goto out_dt;
-+// out_rerr:
-+ IOErr("%.*s reverting failed(%d, %d)\n", DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+ out_dt:
-+ d_drop(dentry);
-+ dtime_revert(&dt, !CPUP_LOCKED_GHDIR);
-+ out_unlock:
-+ hdir_unlock(a.hidden_dir, dir, a.bdst);
-+ dput(wh_dentry);
-+ out:
-+ if (unlikely(err)) {
-+ au_update_dbstart(dentry);
-+ d_drop(dentry);
-+ }
-+ di_write_unlock(a.parent);
-+ aufs_read_and_write_unlock2(dentry, src_dentry);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-+{
-+ int err, rerr, diropq, dlgt;
-+ struct dentry *hidden_dentry, *hidden_parent, *wh_dentry, *parent,
-+ *opq_dentry;
-+ struct inode *hidden_dir, *hidden_inode;
-+ struct dtime dt;
-+ aufs_bindex_t bindex;
-+ struct super_block *sb;
-+
-+ LKTRTrace("i%lu, %.*s, mode 0%o\n", dir->i_ino, DLNPair(dentry), mode);
-+ IMustLock(dir);
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ parent = dentry->d_parent;
-+ di_write_lock_parent(parent);
-+ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, /*src_dentry*/NULL,
-+ /*do_lock_srcdir*/0);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ sb = dentry->d_sb;
-+ bindex = dbstart(dentry);
-+ hidden_dentry = au_h_dptr(dentry);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ dlgt = need_dlgt(sb);
-+
-+ err = vfsub_mkdir(hidden_dir, hidden_dentry, mode, dlgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+ hidden_inode = hidden_dentry->d_inode;
-+
-+ /* make the dir opaque */
-+ diropq = 0;
-+ if (unlikely(wh_dentry || au_flag_test(sb, AuFlag_ALWAYS_DIROPQ))) {
-+ hi_lock_child(hidden_inode);
-+ opq_dentry = create_diropq(dentry, bindex, dlgt);
-+ //opq_dentry = ERR_PTR(-1);
-+ i_unlock(hidden_inode);
-+ err = PTR_ERR(opq_dentry);
-+ if (IS_ERR(opq_dentry))
-+ goto out_dir;
-+ dput(opq_dentry);
-+ diropq = 1;
-+ }
-+
-+ err = epilog(wh_dentry, dentry);
-+ //err = -1;
-+ if (!err) {
-+ dir->i_nlink++;
-+ goto out_unlock; /* success */
-+ }
-+
-+ /* revert */
-+ if (unlikely(diropq)) {
-+ LKTRLabel(revert opq);
-+ hi_lock_child(hidden_inode);
-+ rerr = remove_diropq(dentry, bindex, dlgt);
-+ //rerr = -1;
-+ i_unlock(hidden_inode);
-+ if (rerr) {
-+ IOErr("%.*s reverting diropq failed(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+ }
-+ }
-+
-+ out_dir:
-+ LKTRLabel(revert dir);
-+ rerr = vfsub_rmdir(hidden_dir, hidden_dentry, dlgt);
-+ //rerr = -1;
-+ if (rerr) {
-+ IOErr("%.*s reverting dir failed(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+ }
-+ d_drop(dentry);
-+ dtime_revert(&dt, /*fake flag*/CPUP_LOCKED_GHDIR);
-+ out_unlock:
-+ hdir_unlock(hidden_dir, dir, bindex);
-+ dput(wh_dentry);
-+ out:
-+ if (unlikely(err)) {
-+ au_update_dbstart(dentry);
-+ d_drop(dentry);
-+ }
-+ di_write_unlock(parent);
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-diff --git a/fs/aufs/i_op_del.c b/fs/aufs/i_op_del.c
-new file mode 100755
-index 0000000..f29b204
---- /dev/null
-+++ b/fs/aufs/i_op_del.c
-@@ -0,0 +1,414 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: i_op_del.c,v 1.35 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+/* returns,
-+ * 0: wh is unnecessary
-+ * plus: wh is necessary
-+ * minus: error
-+ */
-+int wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup,
-+ struct dentry *locked)
-+{
-+ int need_wh, err;
-+ aufs_bindex_t bstart;
-+ struct dentry *hidden_dentry;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, isdir %d, *bcpup %d, locked %p\n",
-+ DLNPair(dentry), isdir, *bcpup, locked);
-+ sb = dentry->d_sb;
-+
-+ bstart = dbstart(dentry);
-+ LKTRTrace("bcpup %d, bstart %d\n", *bcpup, bstart);
-+ hidden_dentry = au_h_dptr(dentry);
-+ if (*bcpup < 0) {
-+ *bcpup = bstart;
-+ if (test_ro(sb, bstart, dentry->d_inode)) {
-+ *bcpup = err = find_rw_parent_br(dentry, bstart);
-+ //*bcpup = err = find_rw_br(sb, bstart);
-+ //err = -1;
-+ if (unlikely(err < 0))
-+ goto out;
-+ }
-+ } else {
-+ /* braces are added to stop a warning */
-+ DEBUG_ON(bstart < *bcpup
-+ || test_ro(sb, *bcpup, dentry->d_inode));
-+ }
-+ LKTRTrace("bcpup %d, bstart %d\n", *bcpup, bstart);
-+
-+ if (*bcpup != bstart) {
-+ err = cpup_dirs(dentry, *bcpup, locked);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+ need_wh = 1;
-+ } else {
-+ //struct nameidata nd;
-+ aufs_bindex_t old_bend, new_bend, bdiropq = -1;
-+ old_bend = dbend(dentry);
-+ if (isdir) {
-+ bdiropq = dbdiropq(dentry);
-+ set_dbdiropq(dentry, -1);
-+ }
-+ err = need_wh = lkup_dentry(dentry, bstart + 1, /*type*/0);
-+ //err = -1;
-+ if (isdir)
-+ set_dbdiropq(dentry, bdiropq);
-+ if (unlikely(err < 0))
-+ goto out;
-+ new_bend = dbend(dentry);
-+ if (!need_wh && old_bend != new_bend) {
-+ set_h_dptr(dentry, new_bend, NULL);
-+ set_dbend(dentry, old_bend);
-+#if 0
-+ } else if (!au_h_dptr_i(dentry, new_bend)->d_inode) {
-+ LKTRTrace("negative\n");
-+ set_h_dptr(dentry, new_bend, NULL);
-+ set_dbend(dentry, old_bend);
-+ need_wh = 0;
-+#endif
-+ }
-+ }
-+ LKTRTrace("need_wh %d\n", need_wh);
-+ err = need_wh;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static struct dentry *
-+lock_hdir_create_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup,
-+ struct dtime *dt)
-+{
-+ struct dentry *wh_dentry;
-+ int err, need_wh;
-+ struct dentry *hidden_parent, *parent;
-+ struct inode *dir, *h_dir;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, isdir %d\n", DLNPair(dentry), isdir);
-+
-+ err = need_wh = wr_dir_need_wh(dentry, isdir, bcpup, NULL);
-+ //err = -1;
-+ wh_dentry = ERR_PTR(err);
-+ if (unlikely(err < 0))
-+ goto out;
-+
-+ parent = dentry->d_parent;
-+ dir = parent->d_inode;
-+ hidden_parent = au_h_dptr_i(parent, *bcpup);
-+ h_dir = hidden_parent->d_inode;
-+ hdir_lock(h_dir, dir, *bcpup);
-+ dtime_store(dt, parent, hidden_parent);
-+ if (!need_wh)
-+ return NULL; /* success, no need to create whiteout */
-+
-+ lkup.nfsmnt = au_nfsmnt(dentry->d_sb, *bcpup);
-+ lkup.dlgt = need_dlgt(dentry->d_sb);
-+ wh_dentry = simple_create_wh(dentry, *bcpup, hidden_parent, &lkup);
-+ //wh_dentry = ERR_PTR(-1);
-+ if (!IS_ERR(wh_dentry))
-+ goto out; /* success */
-+ /* returns with the parent is locked and wh_dentry is DGETed */
-+
-+ hdir_unlock(h_dir, dir, *bcpup);
-+
-+ out:
-+ TraceErrPtr(wh_dentry);
-+ return wh_dentry;
-+}
-+
-+static int renwh_and_rmdir(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct aufs_nhash *whlist, struct inode *dir)
-+{
-+ int rmdir_later, err;
-+ struct dentry *hidden_dentry;
-+
-+ LKTRTrace("%.*s, b%d\n", DLNPair(dentry), bindex);
-+
-+ err = rename_whtmp(dentry, bindex);
-+ //err = -1;
-+#if 0
-+ //todo: bug
-+ if (unlikely(err)) {
-+ au_direval_inc(dentry->d_parent);
-+ return err;
-+ }
-+#endif
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!au_is_nfs(hidden_dentry->d_sb)) {
-+ const int dirwh = stosi(dentry->d_sb)->si_dirwh;
-+ rmdir_later = (dirwh <= 1);
-+ if (!rmdir_later)
-+ rmdir_later = is_longer_wh(whlist, bindex, dirwh);
-+ if (rmdir_later)
-+ return rmdir_later;
-+ }
-+
-+ err = rmdir_whtmp(hidden_dentry, whlist, bindex, dir, dentry->d_inode);
-+ //err = -1;
-+ if (unlikely(err)) {
-+ IOErr("rmdir %.*s, b%d failed, %d. ignored\n",
-+ DLNPair(hidden_dentry), bindex, err);
-+ err = 0;
-+ }
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static void epilog(struct inode *dir, struct dentry *dentry,
-+ aufs_bindex_t bindex)
-+{
-+ d_drop(dentry);
-+ dentry->d_inode->i_ctime = dir->i_ctime;
-+ if (atomic_read(&dentry->d_count) == 1) {
-+ set_h_dptr(dentry, dbstart(dentry), NULL);
-+ au_update_dbstart(dentry);
-+ }
-+ if (ibstart(dir) == bindex)
-+ au_cpup_attr_timesizes(dir);
-+ dir->i_version++;
-+}
-+
-+static int do_revert(int err, struct dentry *wh_dentry, struct dentry *dentry,
-+ aufs_bindex_t bwh, struct dtime *dt, int dlgt)
-+{
-+ int rerr;
-+
-+ rerr = au_unlink_wh_dentry(wh_dentry->d_parent->d_inode, wh_dentry,
-+ dentry, dlgt);
-+ //rerr = -1;
-+ if (!rerr) {
-+ set_dbwh(dentry, bwh);
-+ dtime_revert(dt, !CPUP_LOCKED_GHDIR);
-+ return 0;
-+ }
-+
-+ IOErr("%.*s reverting whiteout failed(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ return -EIO;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int aufs_unlink(struct inode *dir, struct dentry *dentry)
-+{
-+ int err, dlgt;
-+ struct inode *inode, *hidden_dir;
-+ struct dentry *parent, *wh_dentry, *hidden_dentry, *hidden_parent;
-+ struct dtime dt;
-+ aufs_bindex_t bwh, bindex, bstart;
-+ struct super_block *sb;
-+
-+ LKTRTrace("i%lu, %.*s\n", dir->i_ino, DLNPair(dentry));
-+ IMustLock(dir);
-+ inode = dentry->d_inode;
-+ if (unlikely(!inode))
-+ return -ENOENT; // possible?
-+ IMustLock(inode);
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ parent = dentry->d_parent;
-+ di_write_lock_parent(parent);
-+
-+ bstart = dbstart(dentry);
-+ bwh = dbwh(dentry);
-+ bindex = -1;
-+ wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/0, &bindex, &dt);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ sb = dir->i_sb;
-+ dlgt = need_dlgt(sb);
-+ hidden_dentry = au_h_dptr(dentry);
-+ dget(hidden_dentry);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+
-+ if (bindex == bstart) {
-+ err = vfsub_unlink(hidden_dir, hidden_dentry, dlgt);
-+ //err = -1;
-+ } else {
-+ DEBUG_ON(!wh_dentry);
-+ hidden_parent = wh_dentry->d_parent;
-+ DEBUG_ON(hidden_parent != au_h_dptr_i(parent, bindex));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ err = 0;
-+ }
-+
-+ if (!err) {
-+ inode->i_nlink--;
-+ epilog(dir, dentry, bindex);
-+#if 0
-+ xino_write0(sb, bstart, hidden_dentry->d_inode->i_ino);
-+ /* ignore this error */
-+#endif
-+ goto out_unlock; /* success */
-+ }
-+
-+ /* revert */
-+ if (wh_dentry) {
-+ int rerr;
-+ rerr = do_revert(err, wh_dentry, dentry, bwh, &dt, dlgt);
-+ if (rerr)
-+ err = rerr;
-+ }
-+
-+ out_unlock:
-+ hdir_unlock(hidden_dir, dir, bindex);
-+ dput(wh_dentry);
-+ dput(hidden_dentry);
-+ out:
-+ di_write_unlock(parent);
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_rmdir(struct inode *dir, struct dentry *dentry)
-+{
-+ int err, rmdir_later;
-+ struct inode *inode, *hidden_dir;
-+ struct dentry *parent, *wh_dentry, *hidden_dentry, *hidden_parent;
-+ struct dtime dt;
-+ aufs_bindex_t bwh, bindex, bstart;
-+ struct rmdir_whtmp_arg *arg;
-+ struct aufs_nhash *whlist;
-+ struct super_block *sb;
-+
-+ LKTRTrace("i%lu, %.*s\n", dir->i_ino, DLNPair(dentry));
-+ IMustLock(dir);
-+ inode = dentry->d_inode;
-+ if (unlikely(!inode))
-+ return -ENOENT; // possible?
-+ IMustLock(inode);
-+
-+ whlist = nhash_new(GFP_KERNEL);
-+ err = PTR_ERR(whlist);
-+ if (IS_ERR(whlist))
-+ goto out;
-+
-+ err = -ENOMEM;
-+ arg = kmalloc(sizeof(*arg), GFP_KERNEL);
-+ //arg = NULL;
-+ if (unlikely(!arg))
-+ goto out_whlist;
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ parent = dentry->d_parent;
-+ di_write_lock_parent(parent);
-+ err = test_empty(dentry, whlist);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_arg;
-+
-+ bstart = dbstart(dentry);
-+ bwh = dbwh(dentry);
-+ bindex = -1;
-+ wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/ 1, &bindex, &dt);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out_arg;
-+
-+ hidden_dentry = au_h_dptr(dentry);
-+ dget(hidden_dentry);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+
-+ rmdir_later = 0;
-+ if (bindex == bstart) {
-+ IMustLock(hidden_dir);
-+ err = renwh_and_rmdir(dentry, bstart, whlist, dir);
-+ //err = -1;
-+ if (err > 0) {
-+ rmdir_later = err;
-+ err = 0;
-+ }
-+ } else {
-+ DEBUG_ON(!wh_dentry);
-+ hidden_parent = wh_dentry->d_parent;
-+ DEBUG_ON(hidden_parent != au_h_dptr_i(parent, bindex));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ err = 0;
-+ }
-+
-+ sb = dentry->d_sb;
-+ if (!err) {
-+ //aufs_bindex_t bi, bend;
-+
-+ au_reset_hinotify(inode, /*flags*/0);
-+ inode->i_nlink = 0;
-+ set_dbdiropq(dentry, -1);
-+ epilog(dir, dentry, bindex);
-+
-+ if (rmdir_later) {
-+ kick_rmdir_whtmp(hidden_dentry, whlist, bstart, dir,
-+ inode, arg);
-+ arg = NULL;
-+ }
-+
-+#if 0
-+ bend = dbend(dentry);
-+ for (bi = bstart; bi <= bend; bi++) {
-+ struct dentry *hd;
-+ hd = au_h_dptr_i(dentry, bi);
-+ if (hd && hd->d_inode)
-+ xino_write0(sb, bi, hd->d_inode->i_ino);
-+ /* ignore this error */
-+ }
-+#endif
-+
-+ goto out_unlock; /* success */
-+ }
-+
-+ /* revert */
-+ LKTRLabel(revert);
-+ if (wh_dentry) {
-+ int rerr;
-+ rerr = do_revert(err, wh_dentry, dentry, bwh, &dt,
-+ need_dlgt(sb));
-+ if (rerr)
-+ err = rerr;
-+ }
-+
-+ out_unlock:
-+ hdir_unlock(hidden_dir, dir, bindex);
-+ dput(wh_dentry);
-+ dput(hidden_dentry);
-+ out_arg:
-+ di_write_unlock(parent);
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ kfree(arg);
-+ out_whlist:
-+ nhash_del(whlist);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-diff --git a/fs/aufs/i_op_ren.c b/fs/aufs/i_op_ren.c
-new file mode 100755
-index 0000000..08137f9
---- /dev/null
-+++ b/fs/aufs/i_op_ren.c
-@@ -0,0 +1,637 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: i_op_ren.c,v 1.39 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include "aufs.h"
-+
-+enum {SRC, DST};
-+struct rename_args {
-+ struct dentry *hidden_dentry[2], *parent[2], *hidden_parent[2];
-+ struct aufs_nhash whlist;
-+ aufs_bindex_t btgt, bstart[2];
-+ struct super_block *sb;
-+
-+ unsigned int isdir:1;
-+ unsigned int issamedir:1;
-+ unsigned int whsrc:1;
-+ unsigned int whdst:1;
-+ unsigned int dlgt:1;
-+} __attribute__((aligned(sizeof(long))));
-+
-+static int do_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry,
-+ struct rename_args *a)
-+{
-+ int err, need_diropq, bycpup, rerr;
-+ struct rmdir_whtmp_arg *tharg;
-+ struct dentry *wh_dentry[2], *hidden_dst, *hg_parent;
-+ struct inode *hidden_dir[2];
-+ aufs_bindex_t bindex, bend;
-+ unsigned int flags;
-+ struct lkup_args lkup = {.dlgt = a->dlgt};
-+
-+ LKTRTrace("%.*s/%.*s, %.*s/%.*s, "
-+ "hd{%p, %p}, hp{%p, %p}, wh %p, btgt %d, bstart{%d, %d}, "
-+ "flags{%d, %d, %d, %d}\n",
-+ DLNPair(a->parent[SRC]), DLNPair(src_dentry),
-+ DLNPair(a->parent[DST]), DLNPair(dentry),
-+ a->hidden_dentry[SRC], a->hidden_dentry[DST],
-+ a->hidden_parent[SRC], a->hidden_parent[DST],
-+ &a->whlist, a->btgt,
-+ a->bstart[SRC], a->bstart[DST],
-+ a->isdir, a->issamedir, a->whsrc, a->whdst);
-+ hidden_dir[SRC] = a->hidden_parent[SRC]->d_inode;
-+ hidden_dir[DST] = a->hidden_parent[DST]->d_inode;
-+ IMustLock(hidden_dir[SRC]);
-+ IMustLock(hidden_dir[DST]);
-+
-+ /* prepare workqueue arg */
-+ hidden_dst = NULL;
-+ tharg = NULL;
-+ if (a->isdir && a->hidden_dentry[DST]->d_inode) {
-+ err = -ENOMEM;
-+ tharg = kmalloc(sizeof(*tharg), GFP_KERNEL);
-+ //tharg = NULL;
-+ if (unlikely(!tharg))
-+ goto out;
-+ hidden_dst = dget(a->hidden_dentry[DST]);
-+ }
-+
-+ wh_dentry[SRC] = wh_dentry[DST] = NULL;
-+ lkup.nfsmnt = au_nfsmnt(a->sb, a->btgt);
-+ /* create whiteout for src_dentry */
-+ if (a->whsrc) {
-+ wh_dentry[SRC] = simple_create_wh(src_dentry, a->btgt,
-+ a->hidden_parent[SRC], &lkup);
-+ //wh_dentry[SRC] = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry[SRC]);
-+ if (IS_ERR(wh_dentry[SRC]))
-+ goto out_tharg;
-+ }
-+
-+ /* lookup whiteout for dentry */
-+ if (a->whdst) {
-+ struct dentry *d;
-+ d = lkup_wh(a->hidden_parent[DST], &dentry->d_name, &lkup);
-+ //d = ERR_PTR(-1);
-+ err = PTR_ERR(d);
-+ if (IS_ERR(d))
-+ goto out_whsrc;
-+ if (!d->d_inode)
-+ dput(d);
-+ else
-+ wh_dentry[DST] = d;
-+ }
-+
-+ /* rename dentry to tmpwh */
-+ if (tharg) {
-+ err = rename_whtmp(dentry, a->btgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_whdst;
-+ set_h_dptr(dentry, a->btgt, NULL);
-+ err = lkup_neg(dentry, a->btgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_whtmp;
-+ a->hidden_dentry[DST] = au_h_dptr_i(dentry, a->btgt);
-+ }
-+
-+ /* cpup src */
-+ if (a->hidden_dentry[DST]->d_inode && a->bstart[SRC] != a->btgt) {
-+ flags = au_flags_cpup(!CPUP_DTIME, a->parent[SRC]);
-+ hg_parent = a->hidden_parent[SRC]->d_parent;
-+ if (!(flags & CPUP_LOCKED_GHDIR)
-+ && hg_parent == a->hidden_parent[DST])
-+ flags |= CPUP_LOCKED_GHDIR;
-+
-+ hi_lock_child(a->hidden_dentry[SRC]->d_inode);
-+ err = sio_cpup_simple(src_dentry, a->btgt, -1, flags);
-+ //err = -1; // untested dir
-+ i_unlock(a->hidden_dentry[SRC]->d_inode);
-+ if (unlikely(err))
-+ goto out_whtmp;
-+ }
-+
-+#if 0
-+ /* clear the target ino in xino */
-+ LKTRTrace("dir %d, dst inode %p\n", a->isdir, a->hidden_dentry[DST]->d_inode);
-+ if (a->isdir && a->hidden_dentry[DST]->d_inode) {
-+ Dbg("here\n");
-+ err = xino_write(a->sb, a->btgt,
-+ a->hidden_dentry[DST]->d_inode->i_ino, 0);
-+ if (unlikely(err))
-+ goto out_whtmp;
-+ }
-+#endif
-+
-+ /* rename by vfs_rename or cpup */
-+ need_diropq = a->isdir
-+ && (wh_dentry[DST]
-+ || dbdiropq(dentry) == a->btgt
-+ || au_flag_test(a->sb, AuFlag_ALWAYS_DIROPQ));
-+ bycpup = 0;
-+ if (dbstart(src_dentry) == a->btgt) {
-+ if (need_diropq && dbdiropq(src_dentry) == a->btgt)
-+ need_diropq = 0;
-+ err = vfsub_rename(hidden_dir[SRC], au_h_dptr(src_dentry),
-+ hidden_dir[DST], a->hidden_dentry[DST],
-+ a->dlgt);
-+ //err = -1;
-+ } else {
-+ bycpup = 1;
-+ flags = au_flags_cpup(!CPUP_DTIME, a->parent[DST]);
-+ hg_parent = a->hidden_parent[DST]->d_parent;
-+ if (!(flags & CPUP_LOCKED_GHDIR)
-+ && hg_parent == a->hidden_parent[SRC])
-+ flags |= CPUP_LOCKED_GHDIR;
-+
-+ hi_lock_child(a->hidden_dentry[SRC]->d_inode);
-+ set_dbstart(src_dentry, a->btgt);
-+ set_h_dptr(src_dentry, a->btgt, dget(a->hidden_dentry[DST]));
-+ //DbgDentry(src_dentry);
-+ //DbgInode(src_dentry->d_inode);
-+ err = sio_cpup_single(src_dentry, a->btgt, a->bstart[SRC], -1,
-+ flags);
-+ //err = -1; // untested dir
-+ if (unlikely(err)) {
-+ set_h_dptr(src_dentry, a->btgt, NULL);
-+ set_dbstart(src_dentry, a->bstart[SRC]);
-+ }
-+ i_unlock(a->hidden_dentry[SRC]->d_inode);
-+ }
-+ if (unlikely(err))
-+ goto out_whtmp;
-+
-+ /* make dir opaque */
-+ if (need_diropq) {
-+ struct dentry *diropq;
-+ struct inode *h_inode;
-+
-+ h_inode = au_h_dptr_i(src_dentry, a->btgt)->d_inode;
-+ hdir_lock(h_inode, src_dentry->d_inode, a->btgt);
-+ diropq = create_diropq(src_dentry, a->btgt, a->dlgt);
-+ //diropq = ERR_PTR(-1);
-+ hdir_unlock(h_inode, src_dentry->d_inode, a->btgt);
-+ err = PTR_ERR(diropq);
-+ if (IS_ERR(diropq))
-+ goto out_rename;
-+ dput(diropq);
-+ }
-+
-+ /* remove whiteout for dentry */
-+ if (wh_dentry[DST]) {
-+ err = au_unlink_wh_dentry(hidden_dir[DST], wh_dentry[DST],
-+ dentry, a->dlgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_diropq;
-+ }
-+
-+ /* remove whtmp */
-+ if (tharg) {
-+ if (au_is_nfs(hidden_dst->d_sb)
-+ || !is_longer_wh(&a->whlist, a->btgt,
-+ stosi(a->sb)->si_dirwh)) {
-+ err = rmdir_whtmp(hidden_dst, &a->whlist, a->btgt, dir,
-+ dentry->d_inode);
-+ if (unlikely(err))
-+ Warn("failed removing whtmp dir %.*s (%d), "
-+ "ignored.\n", DLNPair(hidden_dst), err);
-+ } else {
-+ kick_rmdir_whtmp(hidden_dst, &a->whlist, a->btgt, dir,
-+ dentry->d_inode, tharg);
-+ dput(hidden_dst);
-+ tharg = NULL;
-+ }
-+ }
-+ err = 0;
-+ goto out_success;
-+
-+#define RevertFailure(fmt, args...) do { \
-+ IOErrWhck("revert failure: " fmt " (%d, %d)\n", \
-+ ##args, err, rerr); \
-+ err = -EIO; \
-+ } while(0)
-+
-+ out_diropq:
-+ if (need_diropq) {
-+ struct inode *h_inode;
-+
-+ h_inode = au_h_dptr_i(src_dentry, a->btgt)->d_inode;
-+ // i_lock simplly since inotify is not set to h_inode.
-+ hi_lock_parent(h_inode);
-+ //hdir_lock(h_inode, src_dentry->d_inode, a->btgt);
-+ rerr = remove_diropq(src_dentry, a->btgt, a->dlgt);
-+ //rerr = -1;
-+ //hdir_unlock(h_inode, src_dentry->d_inode, a->btgt);
-+ i_unlock(h_inode);
-+ if (rerr)
-+ RevertFailure("remove diropq %.*s",
-+ DLNPair(src_dentry));
-+ }
-+ out_rename:
-+ if (!bycpup) {
-+ struct dentry *d;
-+ struct qstr *name = &src_dentry->d_name;
-+ d = lkup_one(name->name, a->hidden_parent[SRC], name->len,
-+ &lkup);
-+ //d = ERR_PTR(-1);
-+ rerr = PTR_ERR(d);
-+ if (IS_ERR(d)) {
-+ RevertFailure("lkup_one %.*s", DLNPair(src_dentry));
-+ goto out_whtmp;
-+ }
-+ DEBUG_ON(d->d_inode);
-+ rerr = vfsub_rename
-+ (hidden_dir[DST], au_h_dptr_i(src_dentry, a->btgt),
-+ hidden_dir[SRC], d, a->dlgt);
-+ //rerr = -1;
-+ d_drop(d);
-+ dput(d);
-+ //set_h_dptr(src_dentry, a->btgt, NULL);
-+ if (rerr)
-+ RevertFailure("rename %.*s", DLNPair(src_dentry));
-+ } else {
-+ rerr = vfsub_unlink(hidden_dir[DST], a->hidden_dentry[DST],
-+ a->dlgt);
-+ //rerr = -1;
-+ set_h_dptr(src_dentry, a->btgt, NULL);
-+ set_dbstart(src_dentry, a->bstart[SRC]);
-+ if (rerr)
-+ RevertFailure("unlink %.*s",
-+ DLNPair(a->hidden_dentry[DST]));
-+ }
-+ out_whtmp:
-+ if (tharg) {
-+ struct dentry *d;
-+ struct qstr *name = &dentry->d_name;
-+ LKTRLabel(here);
-+ d = lkup_one(name->name, a->hidden_parent[DST], name->len,
-+ &lkup);
-+ //d = ERR_PTR(-1);
-+ rerr = PTR_ERR(d);
-+ if (IS_ERR(d)) {
-+ RevertFailure("lookup %.*s", LNPair(name));
-+ goto out_whdst;
-+ }
-+ if (d->d_inode) {
-+ d_drop(d);
-+ dput(d);
-+ goto out_whdst;
-+ }
-+ DEBUG_ON(d->d_inode);
-+ rerr = vfsub_rename(hidden_dir[DST], hidden_dst,
-+ hidden_dir[DST], d, a->dlgt);
-+ //rerr = -1;
-+ d_drop(d);
-+ dput(d);
-+ if (rerr) {
-+ RevertFailure("rename %.*s", DLNPair(hidden_dst));
-+ goto out_whdst;
-+ }
-+ set_h_dptr(dentry, a->btgt, NULL);
-+ set_h_dptr(dentry, a->btgt, dget(hidden_dst));
-+ }
-+ out_whdst:
-+ dput(wh_dentry[DST]);
-+ wh_dentry[DST] = NULL;
-+ out_whsrc:
-+ if (wh_dentry[SRC]) {
-+ LKTRLabel(here);
-+ rerr = au_unlink_wh_dentry(hidden_dir[SRC], wh_dentry[SRC],
-+ src_dentry, a->dlgt);
-+ //rerr = -1;
-+ if (rerr)
-+ RevertFailure("unlink %.*s", DLNPair(wh_dentry[SRC]));
-+ }
-+#undef RevertFailure
-+ d_drop(src_dentry);
-+ bend = dbend(src_dentry);
-+ for (bindex = dbstart(src_dentry); bindex <= bend; bindex++) {
-+ struct dentry *hd;
-+ hd = au_h_dptr_i(src_dentry, bindex);
-+ if (hd)
-+ d_drop(hd);
-+ }
-+ d_drop(dentry);
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); bindex <= bend; bindex++) {
-+ struct dentry *hd;
-+ hd = au_h_dptr_i(dentry, bindex);
-+ if (hd)
-+ d_drop(hd);
-+ }
-+ au_update_dbstart(dentry);
-+ if (tharg)
-+ d_drop(hidden_dst);
-+ out_success:
-+ dput(wh_dentry[SRC]);
-+ dput(wh_dentry[DST]);
-+ out_tharg:
-+ if (tharg) {
-+ dput(hidden_dst);
-+ kfree(tharg);
-+ }
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * test if @dentry dir can be rename destination or not.
-+ * success means, it is a logically empty dir.
-+ */
-+static int may_rename_dstdir(struct dentry *dentry, aufs_bindex_t btgt,
-+ struct aufs_nhash *whlist)
-+{
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+
-+ return test_empty(dentry, whlist);
-+}
-+
-+/*
-+ * test if @dentry dir can be rename source or not.
-+ * if it can, return 0 and @children is filled.
-+ * success means,
-+ * - or, it is a logically empty dir.
-+ * - or, it exists on writable branch and has no children including whiteouts
-+ * on the lower branch.
-+ */
-+static int may_rename_srcdir(struct dentry *dentry, aufs_bindex_t btgt)
-+{
-+ int err;
-+ aufs_bindex_t bstart;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+
-+ bstart = dbstart(dentry);
-+ if (bstart != btgt) {
-+ struct aufs_nhash *whlist;
-+
-+ whlist = nhash_new(GFP_KERNEL);
-+ err = PTR_ERR(whlist);
-+ if (IS_ERR(whlist))
-+ goto out;
-+ err = test_empty(dentry, whlist);
-+ nhash_del(whlist);
-+ goto out;
-+ }
-+
-+ if (bstart == dbtaildir(dentry))
-+ return 0; /* success */
-+
-+ err = au_test_empty_lower(dentry);
-+
-+ out:
-+ if (/* unlikely */(err == -ENOTEMPTY))
-+ err = -EXDEV;
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry)
-+{
-+ int err, do_dt_dstdir;
-+ aufs_bindex_t bend, bindex;
-+ struct inode *inode, *dirs[2];
-+ enum {PARENT, CHILD};
-+ /* reduce stack space */
-+ struct {
-+ struct rename_args a;
-+ struct dtime dt[2][2];
-+ } *p;
-+
-+ LKTRTrace("i%lu, %.*s, i%lu, %.*s\n",
-+ src_dir->i_ino, DLNPair(src_dentry),
-+ dir->i_ino, DLNPair(dentry));
-+ IMustLock(src_dir);
-+ IMustLock(dir);
-+ /* braces are added to stop a warning */
-+ if (dentry->d_inode) {
-+ IMustLock(dentry->d_inode);
-+ }
-+
-+ err = -ENOMEM;
-+ BUILD_BUG_ON(sizeof(*p) > PAGE_SIZE);
-+ p = kmalloc(sizeof(*p), GFP_KERNEL);
-+ if (unlikely(!p))
-+ goto out;
-+
-+ err = -ENOTDIR;
-+ p->a.sb = src_dentry->d_sb;
-+ inode = src_dentry->d_inode;
-+ p->a.isdir = !!S_ISDIR(inode->i_mode);
-+ if (unlikely(p->a.isdir && dentry->d_inode
-+ && !S_ISDIR(dentry->d_inode->i_mode)))
-+ goto out_free;
-+
-+ aufs_read_and_write_lock2(dentry, src_dentry, p->a.isdir);
-+ p->a.dlgt = !!need_dlgt(p->a.sb);
-+ p->a.parent[SRC] = p->a.parent[DST] = dentry->d_parent;
-+ p->a.issamedir = (src_dir == dir);
-+ if (p->a.issamedir)
-+ di_write_lock_parent(p->a.parent[DST]);
-+ else {
-+ p->a.parent[SRC] = src_dentry->d_parent;
-+ di_write_lock2_parent(p->a.parent[SRC], p->a.parent[DST],
-+ /*isdir*/1);
-+ }
-+
-+ /* which branch we process */
-+ p->a.bstart[DST] = dbstart(dentry);
-+ p->a.btgt = err = wr_dir(dentry, 1, src_dentry, /*force_btgt*/-1,
-+ /*do_lock_srcdir*/0);
-+ if (unlikely(err < 0))
-+ goto out_unlock;
-+
-+ /* are they available to be renamed */
-+ err = 0;
-+ nhash_init(&p->a.whlist);
-+ if (p->a.isdir && dentry->d_inode) {
-+ set_dbstart(dentry, p->a.bstart[DST]);
-+ err = may_rename_dstdir(dentry, p->a.btgt, &p->a.whlist);
-+ set_dbstart(dentry, p->a.btgt);
-+ }
-+ p->a.hidden_dentry[DST] = au_h_dptr(dentry);
-+ if (unlikely(err))
-+ goto out_unlock;
-+ //todo: minor optimize, their sb may be same while their bindex differs.
-+ p->a.bstart[SRC] = dbstart(src_dentry);
-+ p->a.hidden_dentry[SRC] = au_h_dptr(src_dentry);
-+ if (p->a.isdir) {
-+ err = may_rename_srcdir(src_dentry, p->a.btgt);
-+ if (unlikely(err))
-+ goto out_children;
-+ }
-+
-+ /* prepare the writable parent dir on the same branch */
-+ err = wr_dir_need_wh(src_dentry, p->a.isdir, &p->a.btgt,
-+ p->a.issamedir ? NULL : p->a.parent[DST]);
-+ if (unlikely(err < 0))
-+ goto out_children;
-+ p->a.whsrc = !!err;
-+ p->a.whdst = (p->a.bstart[DST] == p->a.btgt);
-+ if (!p->a.whdst) {
-+ err = cpup_dirs(dentry, p->a.btgt,
-+ p->a.issamedir ? NULL : p->a.parent[SRC]);
-+ if (unlikely(err))
-+ goto out_children;
-+ }
-+
-+ p->a.hidden_parent[SRC] = au_h_dptr_i(p->a.parent[SRC], p->a.btgt);
-+ p->a.hidden_parent[DST] = au_h_dptr_i(p->a.parent[DST], p->a.btgt);
-+ dirs[0] = src_dir;
-+ dirs[1] = dir;
-+ hdir_lock_rename(p->a.hidden_parent, dirs, p->a.btgt, p->a.issamedir);
-+
-+ /* store timestamps to be revertible */
-+ dtime_store(p->dt[PARENT] + SRC, p->a.parent[SRC],
-+ p->a.hidden_parent[SRC]);
-+ if (!p->a.issamedir)
-+ dtime_store(p->dt[PARENT] + DST, p->a.parent[DST],
-+ p->a.hidden_parent[DST]);
-+ do_dt_dstdir = 0;
-+ if (p->a.isdir) {
-+ dtime_store(p->dt[CHILD] + SRC, src_dentry,
-+ p->a.hidden_dentry[SRC]);
-+ if (p->a.hidden_dentry[DST]->d_inode) {
-+ do_dt_dstdir = 1;
-+ dtime_store(p->dt[CHILD] + DST, dentry,
-+ p->a.hidden_dentry[DST]);
-+ }
-+ }
-+
-+ err = do_rename(src_dir, src_dentry, dir, dentry, &p->a);
-+ if (unlikely(err))
-+ goto out_dt;
-+ hdir_unlock_rename(p->a.hidden_parent, dirs, p->a.btgt, p->a.issamedir);
-+
-+ /* update dir attributes */
-+ dir->i_version++;
-+ if (p->a.isdir)
-+ au_cpup_attr_nlink(dir);
-+ if (ibstart(dir) == p->a.btgt)
-+ au_cpup_attr_timesizes(dir);
-+
-+ if (!p->a.issamedir) {
-+ src_dir->i_version++;
-+ if (p->a.isdir)
-+ au_cpup_attr_nlink(src_dir);
-+ if (ibstart(src_dir) == p->a.btgt)
-+ au_cpup_attr_timesizes(src_dir);
-+ }
-+
-+ // is this updating defined in POSIX?
-+ if (unlikely(p->a.isdir)) {
-+ //i_lock(inode);
-+ au_cpup_attr_timesizes(inode);
-+ //i_unlock(inode);
-+ }
-+
-+#if 0
-+ d_drop(src_dentry);
-+#else
-+ /* dput/iput all lower dentries */
-+ set_dbwh(src_dentry, -1);
-+ bend = dbend(src_dentry);
-+ for (bindex = p->a.btgt + 1; bindex <= bend; bindex++) {
-+ struct dentry *hd;
-+ hd = au_h_dptr_i(src_dentry, bindex);
-+ if (hd)
-+ set_h_dptr(src_dentry, bindex, NULL);
-+ }
-+ set_dbend(src_dentry, p->a.btgt);
-+
-+ bend = ibend(inode);
-+ for (bindex = p->a.btgt + 1; bindex <= bend; bindex++) {
-+ struct inode *hi;
-+ hi = au_h_iptr_i(inode, bindex);
-+ if (hi)
-+ set_h_iptr(inode, bindex, NULL, 0);
-+ }
-+ set_ibend(inode, p->a.btgt);
-+#endif
-+
-+#if 0
-+ //au_debug_on();
-+ //DbgDentry(dentry);
-+ //DbgInode(dentry->d_inode);
-+ //au_debug_off();
-+ inode = dentry->d_inode;
-+ if (inode) {
-+ aufs_bindex_t bindex, bend;
-+ struct dentry *hd;
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); bindex <= bend; bindex++) {
-+ hd = au_h_dptr_i(dentry, bindex);
-+ if (hd && hd->d_inode)
-+ xino_write0(p->a.sb, bindex, hd->d_inode->i_ino);
-+ /* ignore this error */
-+ }
-+ }
-+#endif
-+
-+ goto out_children; /* success */
-+
-+ out_dt:
-+ dtime_revert(p->dt[PARENT] + SRC,
-+ p->a.hidden_parent[SRC]->d_parent
-+ == p->a.hidden_parent[DST]);
-+ if (!p->a.issamedir)
-+ dtime_revert(p->dt[PARENT] + DST,
-+ p->a.hidden_parent[DST]->d_parent
-+ == p->a.hidden_parent[SRC]);
-+ if (p->a.isdir && err != -EIO) {
-+ struct dentry *hd;
-+
-+ hd = p->dt[CHILD][SRC].dt_h_dentry;
-+ hi_lock_child(hd->d_inode);
-+ dtime_revert(p->dt[CHILD] + SRC, 1);
-+ i_unlock(hd->d_inode);
-+ if (do_dt_dstdir) {
-+ hd = p->dt[CHILD][DST].dt_h_dentry;
-+ hi_lock_child(hd->d_inode);
-+ dtime_revert(p->dt[CHILD] + DST, 1);
-+ i_unlock(hd->d_inode);
-+ }
-+ }
-+ hdir_unlock_rename(p->a.hidden_parent, dirs, p->a.btgt, p->a.issamedir);
-+ out_children:
-+ nhash_fin(&p->a.whlist);
-+ out_unlock:
-+ //if (unlikely(err /* && p->a.isdir */)) {
-+ if (unlikely(err && p->a.isdir)) {
-+ au_update_dbstart(dentry);
-+ d_drop(dentry);
-+ }
-+ if (p->a.issamedir)
-+ di_write_unlock(p->a.parent[DST]);
-+ else
-+ di_write_unlock2(p->a.parent[SRC], p->a.parent[DST]);
-+ aufs_read_and_write_unlock2(dentry, src_dentry);
-+ out_free:
-+ kfree(p);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-diff --git a/fs/aufs/iinfo.c b/fs/aufs/iinfo.c
-new file mode 100755
-index 0000000..9efbd38
---- /dev/null
-+++ b/fs/aufs/iinfo.c
-@@ -0,0 +1,286 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: iinfo.c,v 1.31 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+//#include <linux/mm.h>
-+#include "aufs.h"
-+
-+struct aufs_iinfo *itoii(struct inode *inode)
-+{
-+ struct aufs_iinfo *iinfo;
-+
-+ iinfo = &(container_of(inode, struct aufs_icntnr, vfs_inode)->iinfo);
-+ /* bad_inode case */
-+ if (unlikely(!iinfo->ii_hinode))
-+ return NULL;
-+ DEBUG_ON(!iinfo->ii_hinode
-+ /* || stosi(inode->i_sb)->si_bend < iinfo->ii_bend */
-+ || iinfo->ii_bend < iinfo->ii_bstart);
-+ return iinfo;
-+}
-+
-+aufs_bindex_t ibstart(struct inode *inode)
-+{
-+ IiMustAnyLock(inode);
-+ return itoii(inode)->ii_bstart;
-+}
-+
-+aufs_bindex_t ibend(struct inode *inode)
-+{
-+ IiMustAnyLock(inode);
-+ return itoii(inode)->ii_bend;
-+}
-+
-+struct aufs_vdir *ivdir(struct inode *inode)
-+{
-+ IiMustAnyLock(inode);
-+ DEBUG_ON(!S_ISDIR(inode->i_mode));
-+ return itoii(inode)->ii_vdir;
-+}
-+
-+struct inode *au_h_iptr_i(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ struct inode *hidden_inode;
-+
-+ IiMustAnyLock(inode);
-+ DEBUG_ON(bindex < 0 || ibend(inode) < bindex);
-+ hidden_inode = itoii(inode)->ii_hinode[0 + bindex].hi_inode;
-+ DEBUG_ON(hidden_inode && atomic_read(&hidden_inode->i_count) <= 0);
-+ return hidden_inode;
-+}
-+
-+struct inode *au_h_iptr(struct inode *inode)
-+{
-+ return au_h_iptr_i(inode, ibstart(inode));
-+}
-+
-+aufs_bindex_t itoid_index(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ IiMustAnyLock(inode);
-+ DEBUG_ON(bindex < 0
-+ || ibend(inode) < bindex
-+ || !itoii(inode)->ii_hinode[0 + bindex].hi_inode);
-+ return itoii(inode)->ii_hinode[0 + bindex].hi_id;
-+}
-+
-+// hard/soft set
-+void set_ibstart(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ struct aufs_iinfo *iinfo = itoii(inode);
-+ struct inode *h_inode;
-+
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(sbend(inode->i_sb) < bindex);
-+ iinfo->ii_bstart = bindex;
-+ h_inode = iinfo->ii_hinode[bindex + 0].hi_inode;
-+ if (h_inode)
-+ au_cpup_igen(inode, h_inode);
-+}
-+
-+void set_ibend(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(sbend(inode->i_sb) < bindex
-+ || bindex < ibstart(inode));
-+ itoii(inode)->ii_bend = bindex;
-+}
-+
-+void set_ivdir(struct inode *inode, struct aufs_vdir *vdir)
-+{
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(!S_ISDIR(inode->i_mode)
-+ || (itoii(inode)->ii_vdir && vdir));
-+ itoii(inode)->ii_vdir = vdir;
-+}
-+
-+void aufs_hiput(struct aufs_hinode *hinode)
-+{
-+ if (unlikely(hinode->hi_notify))
-+ do_free_hinotify(hinode);
-+ if (hinode->hi_inode)
-+ iput(hinode->hi_inode);
-+}
-+
-+unsigned int au_hi_flags(struct inode *inode, int isdir)
-+{
-+ unsigned int flags;
-+ struct super_block *sb = inode->i_sb;
-+
-+ flags = 0;
-+ if (au_flag_test(sb, AuFlag_XINO))
-+ flags = AUFS_HI_XINO;
-+ if (unlikely(isdir && au_flag_test(sb, AuFlag_UDBA_INOTIFY)))
-+ flags |= AUFS_HI_NOTIFY;
-+ return flags;
-+}
-+
-+void set_h_iptr(struct inode *inode, aufs_bindex_t bindex,
-+ struct inode *h_inode, unsigned int flags)
-+{
-+ struct aufs_hinode *hinode;
-+ struct inode *hi;
-+ struct aufs_iinfo *iinfo = itoii(inode);
-+
-+ LKTRTrace("i%lu, b%d, hi%lu, flags 0x%x\n",
-+ inode->i_ino, bindex, h_inode ? h_inode->i_ino : 0, flags);
-+ IiMustWriteLock(inode);
-+ hinode = iinfo->ii_hinode + bindex;
-+ hi = hinode->hi_inode;
-+ DEBUG_ON(bindex < ibstart(inode) || ibend(inode) < bindex
-+ || (h_inode && atomic_read(&h_inode->i_count) <= 0)
-+ || (h_inode && hi));
-+
-+ if (hi)
-+ aufs_hiput(hinode);
-+ hinode->hi_inode = h_inode;
-+ if (h_inode) {
-+ int err;
-+ struct super_block *sb = inode->i_sb;
-+
-+ if (bindex == iinfo->ii_bstart)
-+ au_cpup_igen(inode, h_inode);
-+ hinode->hi_id = sbr_id(sb, bindex);
-+ if (flags & AUFS_HI_XINO) {
-+ struct xino xino = {
-+ .ino = inode->i_ino,
-+ //.h_gen = h_inode->i_generation
-+ };
-+ //WARN_ON(xino.h_gen == AuXino_INVALID_HGEN);
-+ err = xino_write(sb, bindex, h_inode->i_ino, &xino);
-+ if (unlikely(err)) {
-+ IOErr1("failed xino_write() %d, force noxino\n",
-+ err);
-+ au_flag_clr(sb, AuFlag_XINO);
-+ }
-+ }
-+ if (flags & AUFS_HI_NOTIFY) {
-+ err = alloc_hinotify(hinode, inode, h_inode);
-+ if (unlikely(err))
-+ IOErr1("alloc_hinotify() %d\n", err);
-+ else {
-+ /* braces are added to stop a warning */
-+ DEBUG_ON(!hinode->hi_notify);
-+ }
-+ }
-+ }
-+}
-+
-+void au_update_iigen(struct inode *inode)
-+{
-+ //IiMustWriteLock(inode);
-+ DEBUG_ON(!inode->i_sb);
-+ atomic_set(&itoii(inode)->ii_generation, au_sigen(inode->i_sb));
-+}
-+
-+/* it may be called at remount time, too */
-+void au_update_brange(struct inode *inode, int do_put_zero)
-+{
-+ struct aufs_iinfo *iinfo;
-+
-+ LKTRTrace("i%lu, %d\n", inode->i_ino, do_put_zero);
-+ IiMustWriteLock(inode);
-+
-+ iinfo = itoii(inode);
-+ if (unlikely(!iinfo) || iinfo->ii_bstart < 0)
-+ return;
-+
-+ if (do_put_zero) {
-+ aufs_bindex_t bindex;
-+ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend;
-+ bindex++) {
-+ struct inode *h_i;
-+ h_i = iinfo->ii_hinode[0 + bindex].hi_inode;
-+ if (h_i && !h_i->i_nlink)
-+ set_h_iptr(inode, bindex, NULL, 0);
-+ }
-+ }
-+
-+ iinfo->ii_bstart = -1;
-+ while (++iinfo->ii_bstart <= iinfo->ii_bend)
-+ if (iinfo->ii_hinode[0 + iinfo->ii_bstart].hi_inode)
-+ break;
-+ if (iinfo->ii_bstart > iinfo->ii_bend) {
-+ iinfo->ii_bend = iinfo->ii_bstart = -1;
-+ return;
-+ }
-+
-+ iinfo->ii_bend++;
-+ while (0 <= --iinfo->ii_bend)
-+ if (iinfo->ii_hinode[0 + iinfo->ii_bend].hi_inode)
-+ break;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int au_iinfo_init(struct inode *inode)
-+{
-+ struct aufs_iinfo *iinfo;
-+ struct super_block *sb;
-+ int nbr, i;
-+
-+ sb = inode->i_sb;
-+ DEBUG_ON(!sb);
-+ iinfo = &(container_of(inode, struct aufs_icntnr, vfs_inode)->iinfo);
-+ DEBUG_ON(iinfo->ii_hinode);
-+ nbr = sbend(sb) + 1;
-+ if (unlikely(!nbr))
-+ nbr++;
-+ iinfo->ii_hinode = kcalloc(nbr, sizeof(*iinfo->ii_hinode), GFP_KERNEL);
-+ //iinfo->ii_hinode = NULL;
-+ if (iinfo->ii_hinode) {
-+ for (i = 0; i < nbr; i++)
-+ iinfo->ii_hinode[i].hi_id = -1;
-+ atomic_set(&iinfo->ii_generation, au_sigen(sb));
-+ rw_init_nolock(&iinfo->ii_rwsem);
-+ iinfo->ii_bstart = -1;
-+ iinfo->ii_bend = -1;
-+ iinfo->ii_vdir = NULL;
-+ return 0;
-+ }
-+ return -ENOMEM;
-+}
-+
-+void au_iinfo_fin(struct inode *inode)
-+{
-+ struct aufs_iinfo *iinfo;
-+
-+ iinfo = itoii(inode);
-+ /* bad_inode case */
-+ if (unlikely(!iinfo))
-+ return;
-+
-+ if (unlikely(iinfo->ii_vdir))
-+ free_vdir(iinfo->ii_vdir);
-+
-+ if (iinfo->ii_bstart >= 0) {
-+ aufs_bindex_t bend;
-+ struct aufs_hinode *hi;
-+ hi = iinfo->ii_hinode + iinfo->ii_bstart;
-+ bend = iinfo->ii_bend;
-+ while (iinfo->ii_bstart++ <= bend) {
-+ if (hi->hi_inode)
-+ aufs_hiput(hi);
-+ hi++;
-+ }
-+ //iinfo->ii_bstart = iinfo->ii_bend = -1;
-+ }
-+
-+ kfree(iinfo->ii_hinode);
-+ //iinfo->ii_hinode = NULL;
-+}
-diff --git a/fs/aufs/inode.c b/fs/aufs/inode.c
-new file mode 100755
-index 0000000..f18b5d8
---- /dev/null
-+++ b/fs/aufs/inode.c
-@@ -0,0 +1,339 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: inode.c,v 1.22 2007/05/07 03:44:35 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+int au_refresh_hinode(struct inode *inode, struct dentry *dentry)
-+{
-+ int err, new_sz, update, isdir;
-+ struct inode *first;
-+ struct aufs_hinode *p, *q, tmp;
-+ struct super_block *sb;
-+ struct aufs_iinfo *iinfo;
-+ aufs_bindex_t bindex, bend, new_bindex;
-+ unsigned int flags;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ IiMustWriteLock(inode);
-+
-+ err = -ENOMEM;
-+ sb = dentry->d_sb;
-+ bend = sbend(sb);
-+ new_sz = sizeof(*iinfo->ii_hinode) * (bend + 1);
-+ iinfo = itoii(inode);
-+ p = au_kzrealloc(iinfo->ii_hinode, sizeof(*p) * (iinfo->ii_bend + 1),
-+ new_sz, GFP_KERNEL);
-+ //p = NULL;
-+ if (unlikely(!p))
-+ goto out;
-+
-+ iinfo->ii_hinode = p;
-+ err = 0;
-+ update = 0;
-+ p = iinfo->ii_hinode + iinfo->ii_bstart;
-+ first = p->hi_inode;
-+ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend;
-+ bindex++, p++) {
-+ if (unlikely(!p->hi_inode))
-+ continue;
-+
-+ new_bindex = find_brindex(sb, p->hi_id);
-+ if (new_bindex == bindex)
-+ continue;
-+ if (new_bindex < 0) {
-+ update++;
-+ aufs_hiput(p);
-+ p->hi_inode = NULL;
-+ continue;
-+ }
-+
-+ if (new_bindex < iinfo->ii_bstart)
-+ iinfo->ii_bstart = new_bindex;
-+ if (iinfo->ii_bend < new_bindex)
-+ iinfo->ii_bend = new_bindex;
-+ /* swap two hidden inode, and loop again */
-+ q = iinfo->ii_hinode + new_bindex;
-+ tmp = *q;
-+ *q = *p;
-+ *p = tmp;
-+ if (tmp.hi_inode) {
-+ bindex--;
-+ p--;
-+ }
-+ }
-+
-+ isdir = S_ISDIR(inode->i_mode);
-+ flags = au_hi_flags(inode, isdir);
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); bindex <= bend; bindex++) {
-+ struct inode *hi;
-+ struct dentry *hd;
-+
-+ hd = au_h_dptr_i(dentry, bindex);
-+ if (!hd || !hd->d_inode)
-+ continue;
-+
-+ if (iinfo->ii_bstart <= bindex && bindex <= iinfo->ii_bend) {
-+ hi = au_h_iptr_i(inode, bindex);
-+ if (hi) {
-+ if (hi == hd->d_inode)
-+ continue;
-+ //Dbg("here\n");
-+ err = -ESTALE;
-+ break;
-+ }
-+ }
-+ if (bindex < iinfo->ii_bstart)
-+ iinfo->ii_bstart = bindex;
-+ if (iinfo->ii_bend < bindex)
-+ iinfo->ii_bend = bindex;
-+ set_h_iptr(inode, bindex, igrab(hd->d_inode), flags);
-+ update++;
-+ }
-+
-+ bend = iinfo->ii_bend;
-+ p = iinfo->ii_hinode;
-+ for (bindex = 0; bindex <= bend; bindex++, p++)
-+ if (p->hi_inode) {
-+ iinfo->ii_bstart = bindex;
-+ break;
-+ }
-+ p = iinfo->ii_hinode + bend;
-+ for (bindex = bend; bindex > iinfo->ii_bstart; bindex--, p--)
-+ if (p->hi_inode) {
-+ iinfo->ii_bend = bindex;
-+ break;
-+ }
-+ DEBUG_ON(iinfo->ii_bstart > bend || iinfo->ii_bend < 0);
-+
-+ if (unlikely(err))
-+ goto out;
-+
-+ if (1 || first != au_h_iptr(inode))
-+ au_cpup_attr_all(inode);
-+ if (update && isdir)
-+ inode->i_version++;
-+ au_update_iigen(inode);
-+
-+ out:
-+ //au_debug_on();
-+ TraceErr(err);
-+ //au_debug_off();
-+ return err;
-+}
-+
-+static int set_inode(struct inode *inode, struct dentry *dentry)
-+{
-+ int err, isdir;
-+ struct dentry *hidden_dentry;
-+ struct inode *hidden_inode;
-+ umode_t mode;
-+ aufs_bindex_t bindex, bstart, btail;
-+ struct aufs_iinfo *iinfo;
-+ unsigned int flags;
-+
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(dentry));
-+ DEBUG_ON(!(inode->i_state & I_NEW));
-+ IiMustWriteLock(inode);
-+ hidden_dentry = au_h_dptr(dentry);
-+ DEBUG_ON(!hidden_dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+
-+ err = 0;
-+ isdir = 0;
-+ bstart = dbstart(dentry);
-+ mode = hidden_inode->i_mode;
-+ switch (mode & S_IFMT) {
-+ case S_IFREG:
-+ btail = dbtail(dentry);
-+ break;
-+ case S_IFDIR:
-+ isdir = 1;
-+ btail = dbtaildir(dentry);
-+ inode->i_op = &aufs_dir_iop;
-+ inode->i_fop = &aufs_dir_fop;
-+ break;
-+ case S_IFLNK:
-+ btail = dbtail(dentry);
-+ inode->i_op = &aufs_symlink_iop;
-+ break;
-+ case S_IFBLK:
-+ case S_IFCHR:
-+ case S_IFIFO:
-+ case S_IFSOCK:
-+ btail = dbtail(dentry);
-+ init_special_inode(inode, mode, hidden_inode->i_rdev);
-+ break;
-+ default:
-+ IOErr("Unknown file type 0%o\n", mode);
-+ err = -EIO;
-+ goto out;
-+ }
-+
-+ flags = au_hi_flags(inode, isdir);
-+ iinfo = itoii(inode);
-+ iinfo->ii_bstart = bstart;
-+ iinfo->ii_bend = btail;
-+ for (bindex = bstart; bindex <= btail; bindex++) {
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!hidden_dentry)
-+ continue;
-+ DEBUG_ON(!hidden_dentry->d_inode);
-+ set_h_iptr(inode, bindex, igrab(hidden_dentry->d_inode), flags);
-+ }
-+ au_cpup_attr_all(inode);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* successful returns with iinfo write_locked */
-+//todo: return with unlocked?
-+static int reval_inode(struct inode *inode, struct dentry *dentry, int *matched)
-+{
-+ int err;
-+ struct inode *h_inode, *h_dinode;
-+ aufs_bindex_t bindex, bend;
-+ //const int udba = !au_flag_test(inode->i_sb, AuFlag_UDBA_NONE);
-+
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(dentry));
-+
-+ *matched = 0;
-+
-+ /*
-+ * before this function, if aufs got any iinfo lock, it must be only
-+ * one, the parent dir.
-+ * it can happen by UDBA and the obsoleted inode number.
-+ */
-+ err = -EIO;
-+ if (unlikely(inode->i_ino == parent_ino(dentry)))
-+ goto out;
-+
-+ h_dinode = au_h_dptr(dentry)->d_inode;
-+ hi_lock_child(inode); // bad name, this is not a hidden inode.
-+ ii_write_lock_new(inode);
-+ bend = ibend(inode);
-+ for (bindex = ibstart(inode); bindex <= bend; bindex++) {
-+ h_inode = au_h_iptr_i(inode, bindex);
-+ if (h_inode && h_inode == h_dinode) {
-+ //&& (ibs != bstart || !au_test_higen(inode, h_inode)));
-+ *matched = 1;
-+ err = 0;
-+ if (unlikely(au_iigen(inode) != au_digen(dentry)))
-+ err = au_refresh_hinode(inode, dentry);
-+ break;
-+ }
-+ }
-+ i_unlock(inode);
-+ if (unlikely(err))
-+ ii_write_unlock(inode);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* successful returns with iinfo write_locked */
-+//todo: return with unlocked?
-+struct inode *au_new_inode(struct dentry *dentry)
-+{
-+ struct inode *inode, *h_inode;
-+ struct dentry *h_dentry;
-+ ino_t h_ino;
-+ struct super_block *sb;
-+ int err, match;
-+ aufs_bindex_t bstart;
-+ struct xino xino;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ sb = dentry->d_sb;
-+ h_dentry = au_h_dptr(dentry);
-+ DEBUG_ON(!h_dentry);
-+ h_inode = h_dentry->d_inode;
-+ DEBUG_ON(!h_inode);
-+
-+ bstart = dbstart(dentry);
-+ h_ino = h_inode->i_ino;
-+ err = xino_read(sb, bstart, h_ino, &xino);
-+ //err = -1;
-+ inode = ERR_PTR(err);
-+ if (unlikely(err))
-+ goto out;
-+ new_ino:
-+ if (!xino.ino) {
-+ xino.ino = xino_new_ino(sb);
-+ if (!xino.ino) {
-+ inode = ERR_PTR(-EIO);
-+ goto out;
-+ }
-+ }
-+
-+ LKTRTrace("i%lu\n", xino.ino);
-+ err = -ENOMEM;
-+ inode = iget_locked(sb, xino.ino);
-+ if (unlikely(!inode))
-+ goto out;
-+ err = PTR_ERR(inode);
-+ if (IS_ERR(inode))
-+ goto out;
-+ err = -ENOMEM;
-+ if (unlikely(is_bad_inode(inode)))
-+ goto out_iput;
-+
-+ LKTRTrace("%lx, new %d\n", inode->i_state, !!(inode->i_state & I_NEW));
-+ if (inode->i_state & I_NEW) {
-+ sb->s_op->read_inode(inode);
-+ if (!is_bad_inode(inode)) {
-+ ii_write_lock_new(inode);
-+ err = set_inode(inode, dentry);
-+ //err = -1;
-+ }
-+ unlock_new_inode(inode);
-+ if (!err)
-+ goto out; /* success */
-+ ii_write_unlock(inode);
-+ goto out_iput;
-+ } else {
-+ err = reval_inode(inode, dentry, &match);
-+ if (!err)
-+ goto out; /* success */
-+ else if (match)
-+ goto out_iput;
-+ }
-+
-+ Warn1("broken ino, b%d, %.*s/%.*s, hi%lu, i%lu. Try udba=inotify.\n",
-+ bstart, DLNPair(dentry->d_parent), DLNPair(dentry), h_ino,
-+ xino.ino);
-+ xino.ino = 0;
-+ err = xino_write0(sb, bstart, h_ino);
-+ if (!err) {
-+ iput(inode);
-+ goto new_ino;
-+ }
-+
-+ out_iput:
-+ iput(inode);
-+ inode = ERR_PTR(err);
-+ out:
-+ TraceErrPtr(inode);
-+ return inode;
-+}
-diff --git a/fs/aufs/inode.h b/fs/aufs/inode.h
-new file mode 100755
-index 0000000..b001ac3
---- /dev/null
-+++ b/fs/aufs/inode.h
-@@ -0,0 +1,377 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: inode.h,v 1.32 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_INODE_H__
-+#define __AUFS_INODE_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/inotify.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+#include "vfsub.h"
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+#else
-+struct inotify_watch {};
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_hinotify {
-+ struct inotify_watch hin_watch;
-+ struct inode *hin_aufs_inode; /* no get/put */
-+};
-+
-+struct aufs_hinode {
-+ struct inode *hi_inode;
-+ aufs_bindex_t hi_id;
-+ struct aufs_hinotify *hi_notify;
-+};
-+
-+struct aufs_vdir;
-+struct aufs_iinfo {
-+ atomic_t ii_generation;
-+ struct super_block *ii_hsb1; /* no get/put */
-+
-+ struct aufs_rwsem ii_rwsem;
-+ aufs_bindex_t ii_bstart, ii_bend;
-+ struct aufs_hinode *ii_hinode;
-+ struct aufs_vdir *ii_vdir;
-+};
-+
-+struct aufs_icntnr {
-+ struct aufs_iinfo iinfo;
-+ struct inode vfs_inode;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* inode.c */
-+int au_refresh_hinode(struct inode *inode, struct dentry *dentry);
-+struct inode *au_new_inode(struct dentry *dentry);
-+
-+/* i_op.c */
-+extern struct inode_operations aufs_iop, aufs_symlink_iop, aufs_dir_iop;
-+int wr_dir(struct dentry *dentry, int negative, struct dentry *src_dentry,
-+ aufs_bindex_t force_btgt, int do_lock_srcdir);
-+
-+/* i_op_del.c */
-+int wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup,
-+ struct dentry *locked);
-+
-+/* iinfo.c */
-+struct aufs_iinfo *itoii(struct inode *inode);
-+aufs_bindex_t ibstart(struct inode *inode);
-+aufs_bindex_t ibend(struct inode *inode);
-+struct aufs_vdir *ivdir(struct inode *inode);
-+struct inode *au_h_iptr_i(struct inode *inode, aufs_bindex_t bindex);
-+struct inode *au_h_iptr(struct inode *inode);
-+aufs_bindex_t itoid_index(struct inode *inode, aufs_bindex_t bindex);
-+
-+void set_ibstart(struct inode *inode, aufs_bindex_t bindex);
-+void set_ibend(struct inode *inode, aufs_bindex_t bindex);
-+void set_ivdir(struct inode *inode, struct aufs_vdir *vdir);
-+void aufs_hiput(struct aufs_hinode *hinode);
-+#define AUFS_HI_XINO 1
-+#define AUFS_HI_NOTIFY 2
-+unsigned int au_hi_flags(struct inode *inode, int isdir);
-+void set_h_iptr(struct inode *inode, aufs_bindex_t bindex,
-+ struct inode *h_inode, unsigned int flags);
-+void au_update_iigen(struct inode *inode);
-+void au_update_brange(struct inode *inode, int do_put_zero);
-+
-+int au_iinfo_init(struct inode *inode);
-+void au_iinfo_fin(struct inode *inode);
-+
-+/* plink.c */
-+#ifdef CONFIG_AUFS_DEBUG
-+void au_list_plink(struct super_block *sb);
-+#else
-+static inline void au_list_plink(struct super_block *sb)
-+{
-+ /* nothing */
-+}
-+#endif
-+int au_is_plinked(struct super_block *sb, struct inode *inode);
-+struct dentry *lkup_plink(struct super_block *sb, aufs_bindex_t bindex,
-+ struct inode *inode);
-+void append_plink(struct super_block *sb, struct inode *inode,
-+ struct dentry *h_dentry, aufs_bindex_t bindex);
-+void au_put_plink(struct super_block *sb);
-+void half_refresh_plink(struct super_block *sb, aufs_bindex_t br_id);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* lock subclass for hidden inode */
-+/* default MAX_LOCKDEP_SUBCLASSES(8) is not enough */
-+// todo: reduce it by dcsub.
-+enum {
-+ AuLsc_Begin = I_MUTEX_QUOTA,
-+ AuLsc_HI_GPARENT, /* setattr with inotify */
-+ AuLsc_HI_PARENT, /* hidden inode, parent first */
-+ AuLsc_HI_CHILD,
-+ AuLsc_HI_PARENT2, /* copyup dirs */
-+ AuLsc_HI_CHILD2,
-+ AuLsc_End
-+};
-+
-+/* simple abstraction */
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
-+static inline void i_lock(struct inode *i)
-+{
-+ down(&i->i_sem);
-+}
-+
-+static inline void i_unlock(struct inode *i)
-+{
-+ up(&i->i_sem);
-+}
-+
-+static inline int i_trylock(struct inode *i)
-+{
-+ return down_trylock(&i->i_sem);
-+}
-+
-+static inline void hi_lock(struct inode *i, unsigned int lsc)
-+{
-+ i_lock(i);
-+}
-+
-+#define IMustLock(i) DEBUG_ON(!down_trylock(&(i)->i_sem))
-+#else
-+static inline void i_lock(struct inode *i)
-+{
-+ mutex_lock(&i->i_mutex);
-+}
-+
-+static inline void i_unlock(struct inode *i)
-+{
-+ mutex_unlock(&i->i_mutex);
-+}
-+
-+static inline int i_trylock(struct inode *i)
-+{
-+ return mutex_trylock(&i->i_mutex);
-+}
-+
-+static inline void hi_lock(struct inode *i, unsigned int lsc)
-+{
-+ mutex_lock_nested(&i->i_mutex, lsc);
-+}
-+
-+#define IMustLock(i) MtxMustLock(&(i)->i_mutex)
-+#endif
-+
-+/*
-+ * hi_lock_gparent, hi_lock_parent, hi_lock_parent2, hi_lock_child,
-+ * hi_lock_child2, hi_lock_whplink
-+ */
-+#define LockFunc(name, lsc) \
-+static inline void hi_lock_##name(struct inode *h_i) \
-+{hi_lock(h_i, AuLsc_HI_##lsc);}
-+
-+LockFunc(gparent, GPARENT);
-+LockFunc(parent, PARENT);
-+LockFunc(parent2, PARENT2);
-+LockFunc(child, CHILD);
-+LockFunc(child2, CHILD2);
-+LockFunc(whplink, CHILD2); /* sharing lock-subclass */
-+
-+#undef LockFunc
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* tiny test for inode number */
-+/* tmpfs generation is too rough */
-+static inline int au_test_higen(struct inode *inode, struct inode *h_inode)
-+{
-+ //IiMustAnyLock(inode);
-+ return !(itoii(inode)->ii_hsb1 == h_inode->i_sb
-+ && inode->i_generation == h_inode->i_generation);
-+}
-+
-+static inline int au_iigen(struct inode *inode)
-+{
-+ return atomic_read(&itoii(inode)->ii_generation);
-+}
-+
-+#ifdef CONFIG_AUFS_HINOTIFY
-+static inline void au_iigen_dec(struct inode *inode)
-+{
-+ //Dbg("i%lu\n", inode->i_ino);
-+ atomic_dec(&itoii(inode)->ii_generation);
-+}
-+
-+/* hinotify.c */
-+int alloc_hinotify(struct aufs_hinode *hinode, struct inode *inode,
-+ struct inode *h_inode);
-+void do_free_hinotify(struct aufs_hinode *hinode);
-+void do_hdir_lock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex,
-+ unsigned int lsc);
-+void hdir_unlock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex);
-+void hdir_lock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir);
-+void hdir_unlock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir);
-+void au_reset_hinotify(struct inode *inode, unsigned int flags);
-+int __init au_inotify_init(void);
-+void au_inotify_fin(void);
-+#else
-+static inline
-+int alloc_hinotify(struct aufs_hinode *hinode, struct inode *inode,
-+ struct inode *h_inode)
-+{
-+ return -EOPNOTSUPP;
-+}
-+
-+static inline void do_free_hinotify(struct aufs_hinode *hinode)
-+{
-+ /* nothing */
-+}
-+
-+static inline
-+void do_hdir_lock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex,
-+ unsigned int lsc)
-+{
-+ hi_lock(h_dir, lsc);
-+}
-+
-+static inline
-+void hdir_unlock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex)
-+{
-+ i_unlock(h_dir);
-+}
-+
-+static inline
-+void hdir_lock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir)
-+{
-+ vfsub_lock_rename(h_parents[0], h_parents[1]);
-+}
-+
-+static inline
-+void hdir_unlock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir)
-+{
-+ vfsub_unlock_rename(h_parents[0], h_parents[1]);
-+}
-+
-+static inline void au_reset_hinotify(struct inode *inode, unsigned int flags)
-+{
-+ /* nothing */
-+}
-+
-+#define au_inotify_init() 0
-+#define au_inotify_fin() /* */
-+#endif /* CONFIG_AUFS_HINOTIFY */
-+
-+static inline void free_hinotify(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ do_free_hinotify(itoii(inode)->ii_hinode + bindex);
-+}
-+
-+/*
-+ * hgdir_lock, hdir_lock, hdir2_lock
-+ */
-+#define LockFunc(name, lsc) \
-+static inline \
-+void name##_lock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex) \
-+{do_hdir_lock(h_dir, dir, bindex, AuLsc_HI_##lsc);}
-+
-+LockFunc(hgdir, GPARENT);
-+LockFunc(hdir, PARENT);
-+LockFunc(hdir2, PARENT2);
-+
-+#undef LockFunc
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* lock subclass for iinfo */
-+enum {
-+ AuLsc_II_CHILD, /* child first */
-+ AuLsc_II_CHILD2, /* rename(2), link(2), and cpup at hinotify */
-+ AuLsc_II_CHILD3, /* copyup dirs */
-+ AuLsc_II_PARENT,
-+ AuLsc_II_PARENT2,
-+ AuLsc_II_PARENT3,
-+ AuLsc_II_NEW /* new inode */
-+};
-+
-+/*
-+ * ii_read_lock_child, ii_write_lock_child,
-+ * ii_read_lock_child2, ii_write_lock_child2,
-+ * ii_read_lock_child3, ii_write_lock_child3,
-+ * ii_read_lock_parent, ii_write_lock_parent,
-+ * ii_read_lock_parent2, ii_write_lock_parent2,
-+ * ii_read_lock_parent3, ii_write_lock_parent3,
-+ * ii_read_lock_new, ii_write_lock_new
-+ */
-+#define ReadLockFunc(name, lsc) \
-+static inline void ii_read_lock_##name(struct inode *i) \
-+{rw_read_lock_nested(&itoii(i)->ii_rwsem, AuLsc_II_##lsc);}
-+
-+#define WriteLockFunc(name, lsc) \
-+static inline void ii_write_lock_##name(struct inode *i) \
-+{rw_write_lock_nested(&itoii(i)->ii_rwsem, AuLsc_II_##lsc);}
-+
-+#define RWLockFuncs(name, lsc) \
-+ ReadLockFunc(name, lsc); \
-+ WriteLockFunc(name, lsc)
-+
-+RWLockFuncs(child, CHILD);
-+RWLockFuncs(child2, CHILD2);
-+RWLockFuncs(child3, CHILD3);
-+RWLockFuncs(parent, PARENT);
-+RWLockFuncs(parent2, PARENT2);
-+RWLockFuncs(parent3, PARENT3);
-+RWLockFuncs(new, NEW);
-+
-+#undef ReadLockFunc
-+#undef WriteLockFunc
-+#undef RWLockFunc
-+
-+/*
-+ * ii_read_unlock, ii_write_unlock, ii_downgrade_lock
-+ */
-+SimpleUnlockRwsemFuncs(ii, struct inode *i, itoii(i)->ii_rwsem);
-+
-+/* to debug easier, do not make them inlined functions */
-+#define IiMustReadLock(i) do { \
-+ SiMustAnyLock((i)->i_sb); \
-+ RwMustReadLock(&itoii(i)->ii_rwsem); \
-+} while (0)
-+
-+#define IiMustWriteLock(i) do { \
-+ SiMustAnyLock((i)->i_sb); \
-+ RwMustWriteLock(&itoii(i)->ii_rwsem); \
-+} while (0)
-+
-+#define IiMustAnyLock(i) do { \
-+ SiMustAnyLock((i)->i_sb); \
-+ RwMustAnyLock(&itoii(i)->ii_rwsem); \
-+} while (0)
-+
-+#define IiMustNoWaiters(i) RwMustNoWaiters(&itoii(i)->ii_rwsem)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_INODE_H__ */
-diff --git a/fs/aufs/misc.c b/fs/aufs/misc.c
-new file mode 100755
-index 0000000..32e0549
---- /dev/null
-+++ b/fs/aufs/misc.c
-@@ -0,0 +1,228 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: misc.c,v 1.31 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+//#include <linux/mm.h>
-+//#include <asm/uaccess.h>
-+#include "aufs.h"
-+
-+void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp)
-+{
-+ void *q;
-+
-+ LKTRTrace("p %p, nused %d, sz %d, ksize %d\n",
-+ p, nused, new_sz, ksize(p));
-+ DEBUG_ON(new_sz <= 0);
-+ if (new_sz <= nused)
-+ return p;
-+ if (new_sz <= ksize(p)) {
-+ memset(p + nused, 0, new_sz - nused);
-+ return p;
-+ }
-+
-+ q = kmalloc(new_sz, gfp);
-+ //q = NULL;
-+ if (unlikely(!q))
-+ return NULL;
-+ memcpy(q, p, nused);
-+ memset(q + nused, 0, new_sz - nused);
-+ //smp_mb();
-+ kfree(p);
-+ return q;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+// todo: make it inline
-+struct nameidata *fake_dm(struct nameidata *fake_nd, struct nameidata *nd,
-+ struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ LKTRTrace("nd %p, b%d\n", nd, bindex);
-+
-+ if (!nd)
-+ return NULL;
-+
-+ fake_nd->dentry = NULL;
-+ fake_nd->mnt = NULL;
-+
-+#ifndef CONFIG_AUFS_FAKE_DM
-+ DiMustAnyLock(nd->dentry);
-+
-+ if (bindex <= dbend(nd->dentry))
-+ fake_nd->dentry = au_h_dptr_i(nd->dentry, bindex);
-+ if (fake_nd->dentry) {
-+ dget(fake_nd->dentry);
-+ fake_nd->mnt = sbr_mnt(sb, bindex);
-+ DEBUG_ON(!fake_nd->mnt);
-+ mntget(fake_nd->mnt);
-+ } else
-+ fake_nd = ERR_PTR(-ENOENT);
-+#endif
-+
-+ TraceErrPtr(fake_nd);
-+ return fake_nd;
-+}
-+
-+void fake_dm_release(struct nameidata *fake_nd)
-+{
-+#ifndef CONFIG_AUFS_FAKE_DM
-+ if (fake_nd) {
-+ mntput(fake_nd->mnt);
-+ dput(fake_nd->dentry);
-+ }
-+#endif
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int au_copy_file(struct file *dst, struct file *src, loff_t len,
-+ struct super_block *sb, int *sparse)
-+{
-+ int err, all_zero, dlgt;
-+ unsigned long blksize;
-+ char *buf;
-+ /* reduce stack space */
-+ struct iattr *ia;
-+
-+ LKTRTrace("%.*s, %.*s\n",
-+ DLNPair(dst->f_dentry), DLNPair(src->f_dentry));
-+ DEBUG_ON(!(dst->f_mode & FMODE_WRITE));
-+ IMustLock(dst->f_dentry->d_parent->d_inode);
-+
-+ err = -ENOMEM;
-+ blksize = dst->f_dentry->d_sb->s_blocksize;
-+ if (!blksize || PAGE_SIZE < blksize)
-+ blksize = PAGE_SIZE;
-+ LKTRTrace("blksize %lu\n", blksize);
-+ buf = kmalloc(blksize, GFP_KERNEL);
-+ //buf = NULL;
-+ if (unlikely(!buf))
-+ goto out;
-+ ia = kmalloc(sizeof(*ia), GFP_KERNEL);
-+ if (unlikely(!ia))
-+ goto out_buf;
-+
-+ dlgt = need_dlgt(sb);
-+ err = all_zero = 0;
-+ dst->f_pos = src->f_pos = 0;
-+ while (len) {
-+ size_t sz, rbytes, wbytes, i;
-+ char *p;
-+
-+ LKTRTrace("len %lld\n", len);
-+ sz = blksize;
-+ if (len < blksize)
-+ sz = len;
-+
-+ /* support LSM and notify */
-+ rbytes = 0;
-+ while (!rbytes || err == -EAGAIN || err == -EINTR)
-+ err = rbytes = vfsub_read_k(src, buf, sz, &src->f_pos,
-+ dlgt);
-+ if (unlikely(err < 0))
-+ break;
-+
-+ all_zero = 0;
-+ if (len >= rbytes && rbytes == blksize) {
-+ all_zero = 1;
-+ p = buf;
-+ for (i = 0; all_zero && i < rbytes; i++)
-+ all_zero = !*p++;
-+ }
-+ if (!all_zero) {
-+ wbytes = rbytes;
-+ p = buf;
-+ while (wbytes) {
-+ size_t b;
-+ /* support LSM and notify */
-+ err = b = vfsub_write_k(dst, p, wbytes,
-+ &dst->f_pos, dlgt);
-+ if (unlikely(err == -EAGAIN || err == -EINTR))
-+ continue;
-+ if (unlikely(err < 0))
-+ break;
-+ wbytes -= b;
-+ p += b;
-+ }
-+ } else {
-+ loff_t res;
-+ LKTRLabel(hole);
-+ *sparse = 1;
-+ err = res = vfsub_llseek(dst, rbytes, SEEK_CUR);
-+ if (unlikely(res < 0))
-+ break;
-+ }
-+ len -= rbytes;
-+ err = 0;
-+ }
-+
-+ /* the last block may be a hole */
-+ if (unlikely(!err && all_zero)) {
-+ struct dentry *h_d = dst->f_dentry;
-+ struct inode *h_i = h_d->d_inode;
-+
-+ LKTRLabel(last hole);
-+ do {
-+ err = vfsub_write_k(dst, "\0", 1, &dst->f_pos, dlgt);
-+ } while (err == -EAGAIN || err == -EINTR);
-+ if (err == 1) {
-+ ia->ia_size = dst->f_pos;
-+ ia->ia_valid = ATTR_SIZE | ATTR_FILE;
-+ ia->ia_file = dst;
-+ hi_lock_child2(h_i);
-+ err = vfsub_notify_change(h_d, ia, dlgt);
-+ i_unlock(h_i);
-+ }
-+ }
-+
-+ kfree(ia);
-+ out_buf:
-+ kfree(buf);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int test_ro(struct super_block *sb, aufs_bindex_t bindex, struct inode *inode)
-+{
-+ int err;
-+
-+ err = br_rdonly(stobr(sb, bindex));
-+ if (!err && inode) {
-+ struct inode *hi = au_h_iptr_i(inode, bindex);
-+ if (hi)
-+ err = IS_IMMUTABLE(hi) ? -EROFS : 0;
-+ }
-+ return err;
-+}
-+
-+int au_test_perm(struct inode *hidden_inode, int mask, int dlgt)
-+{
-+ if (!current->fsuid)
-+ return 0;
-+ if (unlikely(au_is_nfs(hidden_inode->i_sb)
-+ && (mask & MAY_WRITE)
-+ && S_ISDIR(hidden_inode->i_mode)))
-+ mask |= MAY_READ; /* force permission check */
-+ return vfsub_permission(hidden_inode, mask, NULL, dlgt);
-+}
-diff --git a/fs/aufs/misc.h b/fs/aufs/misc.h
-new file mode 100755
-index 0000000..fea4a2c
---- /dev/null
-+++ b/fs/aufs/misc.h
-@@ -0,0 +1,187 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: misc.h,v 1.25 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_MISC_H__
-+#define __AUFS_MISC_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/namei.h>
-+#include <linux/sched.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#define I_MUTEX_QUOTA 0
-+#define lockdep_off() /* */
-+#define lockdep_on() /* */
-+#define mutex_lock_nested(mtx, lsc) mutex_lock(mtx)
-+#define down_write_nested(rw, lsc) down_write(rw)
-+#define down_read_nested(rw, lsc) down_read(rw)
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_rwsem {
-+ struct rw_semaphore rwsem;
-+#ifdef CONFIG_AUFS_DEBUG
-+ atomic_t rcnt;
-+#endif
-+};
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+#define DbgRcntInit(rw) atomic_set(&(rw)->rcnt, 0)
-+#define DbgRcntInc(rw) atomic_inc(&(rw)->rcnt)
-+#define DbgRcntDec(rw) WARN_ON(atomic_dec_return(&(rw)->rcnt) < 0)
-+#else
-+#define DbgRcntInit(rw) /* */
-+#define DbgRcntInc(rw) /* */
-+#define DbgRcntDec(rw) /* */
-+#endif
-+
-+static inline void rw_init_nolock(struct aufs_rwsem *rw)
-+{
-+ DbgRcntInit(rw);
-+ init_rwsem(&rw->rwsem);
-+}
-+
-+static inline void rw_init_wlock(struct aufs_rwsem *rw)
-+{
-+ rw_init_nolock(rw);
-+ down_write(&rw->rwsem);
-+}
-+
-+static inline void rw_init_wlock_nested(struct aufs_rwsem *rw, unsigned int lsc)
-+{
-+ rw_init_nolock(rw);
-+ down_write_nested(&rw->rwsem, lsc);
-+}
-+
-+static inline void rw_read_lock(struct aufs_rwsem *rw)
-+{
-+ down_read(&rw->rwsem);
-+ DbgRcntInc(rw);
-+}
-+
-+static inline void rw_read_lock_nested(struct aufs_rwsem *rw, unsigned int lsc)
-+{
-+ down_read_nested(&rw->rwsem, lsc);
-+ DbgRcntInc(rw);
-+}
-+
-+static inline void rw_read_unlock(struct aufs_rwsem *rw)
-+{
-+ DbgRcntDec(rw);
-+ up_read(&rw->rwsem);
-+}
-+
-+static inline void rw_dgrade_lock(struct aufs_rwsem *rw)
-+{
-+ DbgRcntInc(rw);
-+ downgrade_write(&rw->rwsem);
-+}
-+
-+static inline void rw_write_lock(struct aufs_rwsem *rw)
-+{
-+ down_write(&rw->rwsem);
-+}
-+
-+static inline void rw_write_lock_nested(struct aufs_rwsem *rw, unsigned int lsc)
-+{
-+ down_write_nested(&rw->rwsem, lsc);
-+}
-+
-+static inline void rw_write_unlock(struct aufs_rwsem *rw)
-+{
-+ up_write(&rw->rwsem);
-+}
-+
-+#if 0 // why is not _nested version defined
-+static inline int rw_read_trylock(struct aufs_rwsem *rw)
-+{
-+ int ret = down_read_trylock(&rw->rwsem);
-+ if (ret)
-+ DbgRcntInc(rw);
-+ return ret;
-+}
-+
-+static inline int rw_write_trylock(struct aufs_rwsem *rw)
-+{
-+ return down_write_trylock(&rw->rwsem);
-+}
-+#endif
-+
-+#undef DbgRcntInit
-+#undef DbgRcntInc
-+#undef DbgRcntDec
-+
-+/* to debug easier, do not make them inlined functions */
-+#define RwMustNoWaiters(rw) DEBUG_ON(!list_empty(&(rw)->rwsem.wait_list))
-+#define RwMustAnyLock(rw) DEBUG_ON(down_write_trylock(&(rw)->rwsem))
-+#ifdef CONFIG_AUFS_DEBUG
-+#define RwMustReadLock(rw) do { \
-+ RwMustAnyLock(rw); \
-+ DEBUG_ON(!atomic_read(&(rw)->rcnt)); \
-+} while (0)
-+#define RwMustWriteLock(rw) do { \
-+ RwMustAnyLock(rw); \
-+ DEBUG_ON(atomic_read(&(rw)->rcnt)); \
-+} while (0)
-+#else
-+#define RwMustReadLock(rw) RwMustAnyLock(rw)
-+#define RwMustWriteLock(rw) RwMustAnyLock(rw)
-+#endif
-+
-+#define SimpleLockRwsemFuncs(prefix, param, rwsem) \
-+static inline void prefix##_read_lock(param) {rw_read_lock(&(rwsem));} \
-+static inline void prefix##_write_lock(param) {rw_write_lock(&(rwsem));}
-+//static inline void prefix##_read_trylock(param) {rw_read_trylock(&(rwsem));}
-+//static inline void prefix##_write_trylock(param) {rw_write_trylock(&(rwsem));}
-+//static inline void prefix##_read_trylock_nested(param, lsc)
-+//{rw_read_trylock_nested(&(rwsem, lsc));}
-+//static inline void prefix##_write_trylock_nestd(param, lsc)
-+//{rw_write_trylock_nested(&(rwsem), nested);}
-+
-+#define SimpleUnlockRwsemFuncs(prefix, param, rwsem) \
-+static inline void prefix##_read_unlock(param) {rw_read_unlock(&(rwsem));} \
-+static inline void prefix##_write_unlock(param) {rw_write_unlock(&(rwsem));} \
-+static inline void prefix##_downgrade_lock(param) {rw_dgrade_lock(&(rwsem));}
-+
-+#define SimpleRwsemFuncs(prefix, param, rwsem) \
-+ SimpleLockRwsemFuncs(prefix, param, rwsem); \
-+ SimpleUnlockRwsemFuncs(prefix, param, rwsem)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+typedef ssize_t (*readf_t)(struct file*, char __user*, size_t, loff_t*);
-+typedef ssize_t (*writef_t)(struct file*, const char __user*, size_t, loff_t*);
-+
-+void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp);
-+struct nameidata *fake_dm(struct nameidata *fake_nd, struct nameidata *nd,
-+ struct super_block *sb, aufs_bindex_t bindex);
-+void fake_dm_release(struct nameidata *fake_nd);
-+int au_copy_file(struct file *dst, struct file *src, loff_t len,
-+ struct super_block *sb, int *sparse);
-+int test_ro(struct super_block *sb, aufs_bindex_t bindex, struct inode *inode);
-+int au_test_perm(struct inode *h_inode, int mask, int dlgt);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_MISC_H__ */
-diff --git a/fs/aufs/module.c b/fs/aufs/module.c
-new file mode 100755
-index 0000000..06c563e
---- /dev/null
-+++ b/fs/aufs/module.c
-@@ -0,0 +1,334 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: module.c,v 1.9 2007/04/30 05:46:32 sfjro Exp $ */
-+
-+//#include <linux/init.h>
-+//#include <linux/kobject.h>
-+#include <linux/module.h>
-+//#include <linux/seq_file.h>
-+//#include <linux/sysfs.h>
-+#include "aufs.h"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * aufs caches
-+ */
-+struct kmem_cache *aufs_cachep[AuCache_Last];
-+static int __init create_cache(void)
-+{
-+#define Cache(type) kmem_cache_create(#type, sizeof(struct type), 0, \
-+ SLAB_RECLAIM_ACCOUNT, NULL, NULL)
-+
-+ if ((aufs_cachep[AuCache_DINFO] = Cache(aufs_dinfo))
-+ && (aufs_cachep[AuCache_ICNTNR] = Cache(aufs_icntnr))
-+ && (aufs_cachep[AuCache_FINFO] = Cache(aufs_finfo))
-+ //&& (aufs_cachep[AuCache_FINFO] = NULL)
-+ && (aufs_cachep[AuCache_VDIR] = Cache(aufs_vdir))
-+ && (aufs_cachep[AuCache_DEHSTR] = Cache(aufs_dehstr))
-+ && (aufs_cachep[AuCache_HINOTIFY] = Cache(aufs_hinotify)))
-+ return 0;
-+ return -ENOMEM;
-+
-+#undef Cache
-+}
-+
-+static void destroy_cache(void)
-+{
-+ int i;
-+ for (i = 0; i < AuCache_Last; i++)
-+ if (aufs_cachep[i])
-+ kmem_cache_destroy(aufs_cachep[i]);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+char au_esc_chars[0x20 + 3]; /* 0x01-0x20, backslash, del, and NULL */
-+int au_dir_roflags;
-+extern struct file_system_type aufs_fs_type;
-+
-+#ifdef DbgDlgt
-+#include <linux/security.h>
-+#include "dbg_dlgt.c"
-+#else
-+#define dbg_dlgt_init() 0
-+#define dbg_dlgt_fin() /* */
-+#endif
-+
-+/*
-+ * functions for module interface.
-+ */
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("Junjiro Okajima");
-+MODULE_DESCRIPTION(AUFS_NAME " -- Another unionfs");
-+MODULE_VERSION(AUFS_VERSION);
-+
-+/* it should be 'byte', but param_set_byte() prints by "%c" */
-+short aufs_nwkq = AUFS_NWKQ_DEF;
-+MODULE_PARM_DESC(nwkq, "the number of workqueue thread, " AUFS_WKQ_NAME);
-+module_param_named(nwkq, aufs_nwkq, short, 0444);
-+
-+int sysaufs_brs = 0;
-+MODULE_PARM_DESC(brs, "use <sysfs>/fs/aufs/brs");
-+module_param_named(brs, sysaufs_brs, int, 0444);
-+
-+static int __init aufs_init(void)
-+{
-+ int err, i;
-+ char *p;
-+
-+ //sbinfo->si_xino is atomic_long_t
-+ BUILD_BUG_ON(sizeof(ino_t) != sizeof(long));
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+ {
-+ struct aufs_destr destr;
-+ destr.len = -1;
-+ DEBUG_ON(destr.len < NAME_MAX);
-+ }
-+
-+#ifdef CONFIG_4KSTACKS
-+ printk("CONFIG_4KSTACKS is defined.\n");
-+#endif
-+#if 0 // verbose debug
-+ {
-+ union {
-+ struct aufs_branch *br;
-+ struct aufs_dinfo *di;
-+ struct aufs_finfo *fi;
-+ struct aufs_iinfo *ii;
-+ struct aufs_hinode *hi;
-+ struct aufs_sbinfo *si;
-+ struct aufs_destr *destr;
-+ struct aufs_de *de;
-+ struct aufs_wh *wh;
-+ struct aufs_vdir *vd;
-+ } u;
-+
-+ printk("br{"
-+ "xino %d, readf %d, writef %d, "
-+ "id %d, perm %d, mnt %d, count %d, "
-+ "wh_sem %d, wh %d, run %d} %d\n",
-+ offsetof(typeof(*u.br), br_xino),
-+ offsetof(typeof(*u.br), br_xino_read),
-+ offsetof(typeof(*u.br), br_xino_write),
-+ offsetof(typeof(*u.br), br_id),
-+ offsetof(typeof(*u.br), br_perm),
-+ offsetof(typeof(*u.br), br_mnt),
-+ offsetof(typeof(*u.br), br_count),
-+ offsetof(typeof(*u.br), br_wh_rwsem),
-+ offsetof(typeof(*u.br), br_wh),
-+ offsetof(typeof(*u.br), br_wh_running),
-+ sizeof(*u.br));
-+ printk("di{gen %d, rwsem %d, bstart %d, bend %d, bwh %d, "
-+ "bdiropq %d, hdentry %d, reval %d} %d\n",
-+ offsetof(typeof(*u.di), di_generation),
-+ offsetof(typeof(*u.di), di_rwsem),
-+ offsetof(typeof(*u.di), di_bstart),
-+ offsetof(typeof(*u.di), di_bend),
-+ offsetof(typeof(*u.di), di_bwh),
-+ offsetof(typeof(*u.di), di_bdiropq),
-+ offsetof(typeof(*u.di), di_hdentry),
-+ offsetof(typeof(*u.di), di_reval),
-+ sizeof(*u.di));
-+ printk("fi{gen %d, rwsem %d, hfile %d, bstart %d, bend %d, "
-+ "h_vm_ops %d, vdir_cach %d} %d\n",
-+ offsetof(typeof(*u.fi), fi_generation),
-+ offsetof(typeof(*u.fi), fi_rwsem),
-+ offsetof(typeof(*u.fi), fi_hfile),
-+ offsetof(typeof(*u.fi), fi_bstart),
-+ offsetof(typeof(*u.fi), fi_bend),
-+ offsetof(typeof(*u.fi), fi_h_vm_ops),
-+ offsetof(typeof(*u.fi), fi_vdir_cache),
-+ sizeof(*u.fi));
-+ printk("ii{rwsem %d, bstart %d, bend %d, hinode %d, vdir %d} "
-+ "%d\n",
-+ offsetof(typeof(*u.ii), ii_rwsem),
-+ offsetof(typeof(*u.ii), ii_bstart),
-+ offsetof(typeof(*u.ii), ii_bend),
-+ offsetof(typeof(*u.ii), ii_hinode),
-+ offsetof(typeof(*u.ii), ii_vdir),
-+ sizeof(*u.ii));
-+ printk("hi{inode %d, id %d, notify %d} %d\n",
-+ offsetof(typeof(*u.hi), hi_inode),
-+ offsetof(typeof(*u.hi), hi_id),
-+ offsetof(typeof(*u.hi), hi_notify),
-+ sizeof(*u.hi));
-+ printk("si{rwsem %d, gen %d, "
-+ "failed_refresh %d, "
-+ "bend %d, last id %d, br %d, "
-+ "flags %d, "
-+ "xino %d, "
-+ "rdcache %d, "
-+ "dirwh %d, "
-+ "pl_lock %d, pl %d, "
-+ "kobj %d} %d\n",
-+ offsetof(typeof(*u.si), si_rwsem),
-+ offsetof(typeof(*u.si), si_generation),
-+ -1,//offsetof(typeof(*u.si), si_failed_refresh_dirs),
-+ offsetof(typeof(*u.si), si_bend),
-+ offsetof(typeof(*u.si), si_last_br_id),
-+ offsetof(typeof(*u.si), si_branch),
-+ offsetof(typeof(*u.si), si_flags),
-+ offsetof(typeof(*u.si), si_xino),
-+ offsetof(typeof(*u.si), si_rdcache),
-+ offsetof(typeof(*u.si), si_dirwh),
-+ offsetof(typeof(*u.si), si_plink_lock),
-+ offsetof(typeof(*u.si), si_plink),
-+ offsetof(typeof(*u.si), si_kobj),
-+ sizeof(*u.si));
-+ printk("destr{len %d, name %d} %d\n",
-+ offsetof(typeof(*u.destr), len),
-+ offsetof(typeof(*u.destr), name),
-+ sizeof(*u.destr));
-+ printk("de{ino %d, type %d, str %d} %d\n",
-+ offsetof(typeof(*u.de), de_ino),
-+ offsetof(typeof(*u.de), de_type),
-+ offsetof(typeof(*u.de), de_str),
-+ sizeof(*u.de));
-+ printk("wh{hash %d, bindex %d, str %d} %d\n",
-+ offsetof(typeof(*u.wh), wh_hash),
-+ offsetof(typeof(*u.wh), wh_bindex),
-+ offsetof(typeof(*u.wh), wh_str),
-+ sizeof(*u.wh));
-+ printk("vd{deblk %d, nblk %d, last %d, ver %d, jiffy %d} %d\n",
-+ offsetof(typeof(*u.vd), vd_deblk),
-+ offsetof(typeof(*u.vd), vd_nblk),
-+ offsetof(typeof(*u.vd), vd_last),
-+ offsetof(typeof(*u.vd), vd_version),
-+ offsetof(typeof(*u.vd), vd_jiffy),
-+ sizeof(*u.vd));
-+ }
-+#endif
-+#endif
-+
-+ p = au_esc_chars;
-+ for (i = 1; i <= ' '; i++)
-+ *p++ = i;
-+ *p++ = '\\';
-+ *p++ = '\x7f';
-+ *p = 0;
-+
-+ au_dir_roflags = au_file_roflags(O_DIRECTORY | O_LARGEFILE);
-+#ifndef CONFIG_AUFS_SYSAUFS
-+ sysaufs_brs = 0;
-+#endif
-+
-+ err = -EINVAL;
-+ if (unlikely(aufs_nwkq <= 0))
-+ goto out;
-+ err = create_cache();
-+ if (unlikely(err))
-+ goto out;
-+ err = sysaufs_init();
-+ if (unlikely(err))
-+ goto out_cache;
-+ err = au_wkq_init();
-+ if (unlikely(err))
-+ goto out_kobj;
-+ err = au_inotify_init();
-+ if (unlikely(err))
-+ goto out_wkq;
-+ err = dbg_dlgt_init();
-+ if (unlikely(err))
-+ goto out_inotify;
-+ err = register_filesystem(&aufs_fs_type);
-+ if (unlikely(err))
-+ goto out_dlgt;
-+ printk(AUFS_NAME " " AUFS_VERSION "\n");
-+ return 0; /* success */
-+
-+ out_dlgt:
-+ dbg_dlgt_fin();
-+ out_inotify:
-+ au_inotify_fin();
-+ out_wkq:
-+ au_wkq_fin();
-+ out_kobj:
-+ sysaufs_fin();
-+ out_cache:
-+ destroy_cache();
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static void __exit aufs_exit(void)
-+{
-+ unregister_filesystem(&aufs_fs_type);
-+ dbg_dlgt_fin();
-+ au_inotify_fin();
-+ au_wkq_fin();
-+ sysaufs_fin();
-+ destroy_cache();
-+}
-+
-+module_init(aufs_init);
-+module_exit(aufs_exit);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+// fake Kconfig
-+#if 1
-+#ifdef CONFIG_AUFS_HINOTIFY
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#error CONFIG_AUFS_HINOTIFY is supported in linux-2.6.18 and later.
-+#endif
-+#ifndef CONFIG_INOTIFY
-+#error enable CONFIG_INOTIFY to use CONFIG_AUFS_HINOTIFY.
-+#endif
-+#endif
-+
-+#if AUFS_BRANCH_MAX > 511 && BITS_PER_LONG == 64 && PAGE_SIZE == 4096
-+#warning For 4k pagesize and 64bit environment, \
-+ CONFIG_AUFS_BRANCH_MAX_511 or smaller is recommended.
-+#endif
-+
-+#ifdef CONFIG_AUFS_SYSAUFS
-+#ifndef CONFIG_SYSFS
-+#error CONFIG_AUFS_SYSAUFS requires CONFIG_SYSFS.
-+#endif
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#error CONFIG_AUFS_SYSAUFS requires linux-2.6.18 and later.
-+#endif
-+#endif
-+
-+#ifdef CONFIG_AUFS_EXPORT
-+#if !defined(CONFIG_EXPORTFS) && !defined(CONFIG_EXPORTFS_MODULE)
-+#error CONFIG_AUFS_EXPORT requires CONFIG_EXPORTFS
-+#endif
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#error CONFIG_AUFS_EXPORT requires linux-2.6.18 and later.
-+#endif
-+#if defined(CONFIG_EXPORTFS_MODULE) && defined(CONFIG_AUFS)
-+#error need CONFIG_EXPORTFS=y to link aufs statically with CONFIG_AUFS_EXPORT
-+#endif
-+#endif
-+
-+#ifdef CONFIG_DEBUG_PROVE_LOCKING
-+#if MAX_LOCKDEP_SUBCLASSES < AuLsc_End
-+#warning lockdep will not work since aufs uses deeper locks.
-+#endif
-+#endif
-+
-+#ifdef CONFIG_AUFS_COMPAT
-+#warning CONFIG_AUFS_COMPAT will be removed in the near future.
-+#endif
-+
-+#endif
-diff --git a/fs/aufs/module.h b/fs/aufs/module.h
-new file mode 100755
-index 0000000..3769861
---- /dev/null
-+++ b/fs/aufs/module.h
-@@ -0,0 +1,60 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: module.h,v 1.8 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_MODULE_H__
-+#define __AUFS_MODULE_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/slab.h>
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* module parameters */
-+extern short aufs_nwkq;
-+extern int sysaufs_brs;
-+
-+/* ---------------------------------------------------------------------- */
-+
-+extern char au_esc_chars[];
-+extern int au_dir_roflags;
-+
-+/* kmem cache */
-+enum {AuCache_DINFO, AuCache_ICNTNR, AuCache_FINFO, AuCache_VDIR,
-+ AuCache_DEHSTR, AuCache_HINOTIFY, AuCache_Last};
-+extern struct kmem_cache *aufs_cachep[];
-+
-+#define CacheFuncs(name, index) \
-+static inline void *cache_alloc_##name(void) \
-+{return kmem_cache_alloc(aufs_cachep[index], GFP_KERNEL);} \
-+static inline void cache_free_##name(void *p) \
-+{kmem_cache_free(aufs_cachep[index], p);}
-+
-+CacheFuncs(dinfo, AuCache_DINFO);
-+CacheFuncs(icntnr, AuCache_ICNTNR);
-+CacheFuncs(finfo, AuCache_FINFO);
-+CacheFuncs(vdir, AuCache_VDIR);
-+CacheFuncs(dehstr, AuCache_DEHSTR);
-+CacheFuncs(hinotify, AuCache_HINOTIFY);
-+
-+#undef CacheFuncs
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_MODULE_H__ */
-diff --git a/fs/aufs/opts.c b/fs/aufs/opts.c
-new file mode 100755
-index 0000000..c1a9445
---- /dev/null
-+++ b/fs/aufs/opts.c
-@@ -0,0 +1,1043 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: opts.c,v 1.34 2007/05/14 03:40:27 sfjro Exp $ */
-+
-+#include <asm/types.h> // a distribution requires
-+#include <linux/parser.h>
-+#include "aufs.h"
-+
-+enum {
-+ Opt_br,
-+ Opt_add, Opt_del, Opt_mod, Opt_append, Opt_prepend,
-+ Opt_idel, Opt_imod,
-+ Opt_dirwh, Opt_rdcache, Opt_deblk, Opt_nhash,
-+ Opt_xino, Opt_zxino, Opt_noxino,
-+ Opt_plink, Opt_noplink, Opt_list_plink, Opt_clean_plink,
-+ Opt_udba,
-+ Opt_diropq_a, Opt_diropq_w,
-+ Opt_warn_perm, Opt_nowarn_perm,
-+ Opt_findrw_dir, Opt_findrw_br,
-+ Opt_coo,
-+ Opt_dlgt, Opt_nodlgt,
-+ Opt_tail, Opt_ignore, Opt_err
-+};
-+
-+static match_table_t options = {
-+ {Opt_br, "br=%s"},
-+ {Opt_br, "br:%s"},
-+
-+ {Opt_add, "add=%d:%s"},
-+ {Opt_add, "add:%d:%s"},
-+ {Opt_add, "ins=%d:%s"},
-+ {Opt_add, "ins:%d:%s"},
-+ {Opt_append, "append=%s"},
-+ {Opt_append, "append:%s"},
-+ {Opt_prepend, "prepend=%s"},
-+ {Opt_prepend, "prepend:%s"},
-+
-+ {Opt_del, "del=%s"},
-+ {Opt_del, "del:%s"},
-+ //{Opt_idel, "idel:%d"},
-+ {Opt_mod, "mod=%s"},
-+ {Opt_mod, "mod:%s"},
-+ //{Opt_imod, "imod:%d:%s"},
-+
-+ {Opt_dirwh, "dirwh=%d"},
-+ {Opt_dirwh, "dirwh:%d"},
-+
-+ {Opt_xino, "xino=%s"},
-+ {Opt_xino, "xino:%s"},
-+ {Opt_noxino, "noxino"},
-+ //{Opt_zxino, "zxino=%s"},
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
-+ {Opt_plink, "plink"},
-+ {Opt_noplink, "noplink"},
-+#ifdef CONFIG_AUFS_DEBUG
-+ {Opt_list_plink, "list_plink"},
-+#endif
-+ {Opt_clean_plink, "clean_plink"},
-+#endif
-+
-+ {Opt_udba, "udba=%s"},
-+
-+ {Opt_diropq_a, "diropq=always"},
-+ {Opt_diropq_a, "diropq=a"},
-+ {Opt_diropq_w, "diropq=whiteouted"},
-+ {Opt_diropq_w, "diropq=w"},
-+
-+ {Opt_warn_perm, "warn_perm"},
-+ {Opt_nowarn_perm, "nowarn_perm"},
-+
-+#ifdef CONFIG_AUFS_DLGT
-+ {Opt_dlgt, "dlgt"},
-+ {Opt_nodlgt, "nodlgt"},
-+#endif
-+
-+ {Opt_rdcache, "rdcache=%d"},
-+ {Opt_rdcache, "rdcache:%d"},
-+#if 0
-+ {Opt_findrw_dir, "findrw=dir"},
-+ {Opt_findrw_br, "findrw=br"},
-+
-+ {Opt_coo, "coo=%s"},
-+
-+ {Opt_deblk, "deblk=%d"},
-+ {Opt_deblk, "deblk:%d"},
-+ {Opt_nhash, "nhash=%d"},
-+ {Opt_nhash, "nhash:%d"},
-+#endif
-+
-+ {Opt_br, "dirs=%s"},
-+ {Opt_ignore, "debug=%d"},
-+ {Opt_ignore, "delete=whiteout"},
-+ {Opt_ignore, "delete=all"},
-+ {Opt_ignore, "imap=%s"},
-+
-+ {Opt_err, NULL}
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define RW "rw"
-+#define RO "ro"
-+#define WH "wh"
-+#define RR "rr"
-+#define NoLinkWH "nolwh"
-+
-+static match_table_t brperms = {
-+ {AuBr_RR, RR},
-+ {AuBr_RO, RO},
-+ {AuBr_RW, RW},
-+
-+ {AuBr_RRWH, RR "+" WH},
-+ {AuBr_ROWH, RO "+" WH},
-+ {AuBr_RWNoLinkWH, RW "+" NoLinkWH},
-+
-+ {AuBr_ROWH, "nfsro"},
-+ {AuBr_RO, NULL}
-+};
-+
-+static int br_perm_val(char *perm)
-+{
-+ int val;
-+ substring_t args[MAX_OPT_ARGS];
-+
-+ DEBUG_ON(!perm || !*perm);
-+ LKTRTrace("perm %s\n", perm);
-+ val = match_token(perm, brperms, args);
-+ TraceErr(val);
-+ return val;
-+}
-+
-+int br_perm_str(char *p, unsigned int len, int brperm)
-+{
-+ struct match_token *bp = brperms;
-+
-+ LKTRTrace("len %d, 0x%x\n", len, brperm);
-+
-+ while (bp->pattern) {
-+ if (bp->token == brperm) {
-+ if (strlen(bp->pattern) < len) {
-+ strcpy(p, bp->pattern);
-+ return 0;
-+ } else
-+ return -E2BIG;
-+ }
-+ bp++;
-+ }
-+
-+ return -EIO;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static match_table_t udbalevel = {
-+ {AuFlag_UDBA_REVAL, "reval"},
-+#ifdef CONFIG_AUFS_HINOTIFY
-+ {AuFlag_UDBA_INOTIFY, "inotify"},
-+#endif
-+ {AuFlag_UDBA_NONE, "none"},
-+ {-1, NULL}
-+};
-+
-+static int udba_val(char *str)
-+{
-+ substring_t args[MAX_OPT_ARGS];
-+ return match_token(str, udbalevel, args);
-+}
-+
-+au_parser_pattern_t udba_str(int udba)
-+{
-+ struct match_token *p = udbalevel;
-+ while (p->pattern) {
-+ if (p->token == udba)
-+ return p->pattern;
-+ p++;
-+ }
-+ BUG();
-+ return "??";
-+}
-+
-+void udba_set(struct super_block *sb, unsigned int flg)
-+{
-+ au_flag_clr(sb, AuMask_UDBA);
-+ au_flag_set(sb, flg);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static match_table_t coolevel = {
-+ {AuFlag_COO_LEAF, "leaf"},
-+ {AuFlag_COO_ALL, "all"},
-+ {AuFlag_COO_NONE, "none"},
-+ {-1, NULL}
-+};
-+
-+#if 0
-+static int coo_val(char *str)
-+{
-+ substring_t args[MAX_OPT_ARGS];
-+ return match_token(str, coolevel, args);
-+}
-+#endif
-+
-+au_parser_pattern_t coo_str(int coo)
-+{
-+ struct match_token *p = coolevel;
-+ while (p->pattern) {
-+ if (p->token == coo)
-+ return p->pattern;
-+ p++;
-+ }
-+ BUG();
-+ return "??";
-+}
-+static void coo_set(struct super_block *sb, unsigned int flg)
-+{
-+ au_flag_clr(sb, AuMask_COO);
-+ au_flag_set(sb, flg);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static const int lkup_dirflags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+static void dump_opts(struct opts *opts)
-+{
-+ /* reduce stack space */
-+ union {
-+ struct opt_add *add;
-+ struct opt_del *del;
-+ struct opt_mod *mod;
-+ struct opt_xino *xino;
-+ } u;
-+ struct opt *opt;
-+
-+ TraceEnter();
-+
-+ opt = opts->opt;
-+ while (/* opt < opts_tail && */ opt->type != Opt_tail) {
-+ switch (opt->type) {
-+ case Opt_add:
-+ u.add = &opt->add;
-+ LKTRTrace("add {b%d, %s, 0x%x, %p}\n",
-+ u.add->bindex, u.add->path, u.add->perm,
-+ u.add->nd.dentry);
-+ break;
-+ case Opt_del:
-+ case Opt_idel:
-+ u.del = &opt->del;
-+ LKTRTrace("del {%s, %p}\n", u.del->path, u.del->h_root);
-+ break;
-+ case Opt_mod:
-+ case Opt_imod:
-+ u.mod = &opt->mod;
-+ LKTRTrace("mod {%s, 0x%x, %p}\n",
-+ u.mod->path, u.mod->perm, u.mod->h_root);
-+ break;
-+ case Opt_append:
-+ u.add = &opt->add;
-+ LKTRTrace("append {b%d, %s, 0x%x, %p}\n",
-+ u.add->bindex, u.add->path, u.add->perm,
-+ u.add->nd.dentry);
-+ break;
-+ case Opt_prepend:
-+ u.add = &opt->add;
-+ LKTRTrace("prepend {b%d, %s, 0x%x, %p}\n",
-+ u.add->bindex, u.add->path, u.add->perm,
-+ u.add->nd.dentry);
-+ break;
-+ case Opt_dirwh:
-+ LKTRTrace("dirwh %d\n", opt->dirwh);
-+ break;
-+ case Opt_rdcache:
-+ LKTRTrace("rdcache %d\n", opt->rdcache);
-+ break;
-+ case Opt_xino:
-+ u.xino = &opt->xino;
-+ LKTRTrace("xino {%s %.*s}\n",
-+ u.xino->path, DLNPair(u.xino->file->f_dentry));
-+ break;
-+ case Opt_noxino:
-+ LKTRLabel(noxino);
-+ break;
-+ case Opt_plink:
-+ LKTRLabel(plink);
-+ break;
-+ case Opt_noplink:
-+ LKTRLabel(noplink);
-+ break;
-+ case Opt_list_plink:
-+ LKTRLabel(list_plink);
-+ break;
-+ case Opt_clean_plink:
-+ LKTRLabel(clean_plink);
-+ break;
-+ case Opt_udba:
-+ LKTRTrace("udba %d, %s\n",
-+ opt->udba, udba_str(opt->udba));
-+ break;
-+ case Opt_diropq_a:
-+ LKTRLabel(diropq_a);
-+ break;
-+ case Opt_diropq_w:
-+ LKTRLabel(diropq_w);
-+ break;
-+ case Opt_warn_perm:
-+ LKTRLabel(warn_perm);
-+ break;
-+ case Opt_nowarn_perm:
-+ LKTRLabel(nowarn_perm);
-+ break;
-+ case Opt_dlgt:
-+ LKTRLabel(dlgt);
-+ break;
-+ case Opt_nodlgt:
-+ LKTRLabel(nodlgt);
-+ break;
-+ case Opt_coo:
-+ LKTRTrace("coo %d, %s\n", opt->coo, coo_str(opt->coo));
-+ break;
-+ default:
-+ BUG();
-+ }
-+ opt++;
-+ }
-+}
-+#else
-+#define dump_opts(opts) /* */
-+#endif
-+
-+void au_free_opts(struct opts *opts)
-+{
-+ struct opt *opt;
-+
-+ TraceEnter();
-+
-+ opt = opts->opt;
-+ while (opt->type != Opt_tail) {
-+ switch (opt->type) {
-+ case Opt_add:
-+ case Opt_append:
-+ case Opt_prepend:
-+ path_release(&opt->add.nd);
-+ break;
-+ case Opt_del:
-+ case Opt_idel:
-+ dput(opt->del.h_root);
-+ break;
-+ case Opt_mod:
-+ case Opt_imod:
-+ dput(opt->mod.h_root);
-+ break;
-+ case Opt_xino:
-+ fput(opt->xino.file);
-+ break;
-+ }
-+ opt++;
-+ }
-+}
-+
-+static int opt_add(struct opt *opt, char *opt_str, struct super_block *sb,
-+ aufs_bindex_t bindex)
-+{
-+ int err;
-+ struct opt_add *add = &opt->add;
-+ char *p;
-+
-+ LKTRTrace("%s, b%d\n", opt_str, bindex);
-+
-+ add->bindex = bindex;
-+ add->perm = AuBr_RO;
-+ if (!bindex && !(sb->s_flags & MS_RDONLY))
-+ add->perm = AuBr_RW;
-+#ifdef CONFIG_AUFS_COMPAT
-+ add->perm = AuBr_RW;
-+#endif
-+ add->path = opt_str;
-+ p = strchr(opt_str, '=');
-+ if (unlikely(p)) {
-+ *p++ = 0;
-+ if (*p)
-+ add->perm = br_perm_val(p);
-+ }
-+
-+ // LSM may detect it
-+ // do not superio.
-+ err = path_lookup(add->path, lkup_dirflags, &add->nd);
-+ //err = -1;
-+ if (!err) {
-+ opt->type = Opt_add;
-+ goto out;
-+ }
-+ Err("lookup failed %s (%d)\n", add->path, err);
-+ err = -EINVAL;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* called without aufs lock */
-+int au_parse_opts(struct super_block *sb, char *str, struct opts *opts)
-+{
-+ int err, n;
-+ struct dentry *root;
-+ struct opt *opt, *opt_tail;
-+ char *opt_str;
-+ substring_t args[MAX_OPT_ARGS];
-+ aufs_bindex_t bindex;
-+ struct nameidata nd;
-+ /* reduce stack space */
-+ union {
-+ struct opt_del *del;
-+ struct opt_mod *mod;
-+ struct opt_xino *xino;
-+ } u;
-+ struct file *file;
-+
-+ LKTRTrace("%s, nopts %d\n", str, opts->max_opt);
-+
-+ root = sb->s_root;
-+ err = 0;
-+ bindex = 0;
-+ opt = opts->opt;
-+ opt_tail = opt + opts->max_opt - 1;
-+ opt->type = Opt_tail;
-+ while (!err && (opt_str = strsep(&str, ",")) && *opt_str) {
-+ int token, skipped;
-+ char *p;
-+ err = -EINVAL;
-+ token = match_token(opt_str, options, args);
-+ LKTRTrace("%s, token %d, args[0]{%p, %p}\n",
-+ opt_str, token, args[0].from, args[0].to);
-+
-+ skipped = 0;
-+ switch (token) {
-+ case Opt_br:
-+ err = 0;
-+ while (!err && (opt_str = strsep(&args[0].from, ":"))
-+ && *opt_str) {
-+ err = opt_add(opt, opt_str, sb, bindex++);
-+ //if (LktrCond) err = -1;
-+ if (unlikely(!err && ++opt > opt_tail)) {
-+ err = -E2BIG;
-+ break;
-+ }
-+ opt->type = Opt_tail;
-+ skipped = 1;
-+ }
-+ break;
-+ case Opt_add:
-+ if (unlikely(match_int(&args[0], &n))) {
-+ Err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ bindex = n;
-+ err = opt_add(opt, args[1].from, sb, bindex);
-+ break;
-+ case Opt_append:
-+ case Opt_prepend:
-+ err = opt_add(opt, args[0].from, sb, /*dummy bindex*/1);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+ case Opt_del:
-+ u.del = &opt->del;
-+ u.del->path = args[0].from;
-+ LKTRTrace("del path %s\n", u.del->path);
-+ // LSM may detect it
-+ // do not superio.
-+ err = path_lookup(u.del->path, lkup_dirflags, &nd);
-+ if (unlikely(err)) {
-+ Err("lookup failed %s (%d)\n", u.del->path, err);
-+ break;
-+ }
-+ u.del->h_root = dget(nd.dentry);
-+ path_release(&nd);
-+ opt->type = token;
-+ break;
-+#if 0
-+ case Opt_idel:
-+ u.del = &opt->del;
-+ u.del->path = "(indexed)";
-+ if (unlikely(match_int(&args[0], &n))) {
-+ Err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ bindex = n;
-+ aufs_read_lock(root, !AUFS_I_RLOCK);
-+ if (bindex < 0 || sbend(sb) < bindex) {
-+ Err("out of bounds, %d\n", bindex);
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ break;
-+ }
-+ err = 0;
-+ u.del->h_root = dget(au_h_dptr_i(root, bindex));
-+ opt->type = token;
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ break;
-+#endif
-+
-+ case Opt_mod:
-+ u.mod = &opt->mod;
-+ u.mod->path = args[0].from;
-+ p = strchr(u.mod->path, '=');
-+ if (unlikely(!p)) {
-+ Err("no permssion %s\n", opt_str);
-+ break;
-+ }
-+ *p++ = 0;
-+ u.mod->perm = br_perm_val(p);
-+ LKTRTrace("mod path %s, perm 0x%x, %s\n",
-+ u.mod->path, u.mod->perm, p);
-+ // LSM may detect it
-+ // do not superio.
-+ err = path_lookup(u.mod->path, lkup_dirflags, &nd);
-+ if (unlikely(err)) {
-+ Err("lookup failed %s (%d)\n", u.mod->path, err);
-+ break;
-+ }
-+ u.mod->h_root = dget(nd.dentry);
-+ path_release(&nd);
-+ opt->type = token;
-+ break;
-+#if 0
-+ case Opt_imod:
-+ u.mod = &opt->mod;
-+ u.mod->path = "(indexed)";
-+ if (unlikely(match_int(&args[0], &n))) {
-+ Err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ bindex = n;
-+ aufs_read_lock(root, !AUFS_I_RLOCK);
-+ if (bindex < 0 || sbend(sb) < bindex) {
-+ Err("out of bounds, %d\n", bindex);
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ break;
-+ }
-+ u.mod->perm = br_perm_val(args[1].from);
-+ LKTRTrace("mod path %s, perm 0x%x, %s\n",
-+ u.mod->path, u.mod->perm, args[1].from);
-+ err = 0;
-+ u.mod->h_root = dget(au_h_dptr_i(root, bindex));
-+ opt->type = token;
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ break;
-+#endif
-+ case Opt_xino:
-+ u.xino = &opt->xino;
-+ file = xino_create(sb, args[0].from, /*silent*/0,
-+ /*parent*/NULL);
-+ err = PTR_ERR(file);
-+ if (IS_ERR(file))
-+ break;
-+ err = -EINVAL;
-+ if (unlikely(file->f_dentry->d_sb == sb)) {
-+ fput(file);
-+ Err("%s must be outside\n", args[0].from);
-+ break;
-+ }
-+ err = 0;
-+ u.xino->file = file;
-+ u.xino->path = args[0].from;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_dirwh:
-+ if (unlikely(match_int(&args[0], &opt->dirwh)))
-+ break;
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_rdcache:
-+ if (unlikely(match_int(&args[0], &opt->rdcache)))
-+ break;
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_noxino:
-+ case Opt_plink:
-+ case Opt_noplink:
-+ case Opt_list_plink:
-+ case Opt_clean_plink:
-+ case Opt_diropq_a:
-+ case Opt_diropq_w:
-+ case Opt_warn_perm:
-+ case Opt_nowarn_perm:
-+ case Opt_dlgt:
-+ case Opt_nodlgt:
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_udba:
-+ opt->udba = udba_val(args[0].from);
-+ if (opt->udba >= 0) {
-+ err = 0;
-+ opt->type = token;
-+ }
-+ break;
-+
-+#if 0
-+ case Opt_coo:
-+ opt->coo = coo_val(args[0].from);
-+ if (opt->coo >= 0) {
-+ err = 0;
-+ opt->type = token;
-+ }
-+ break;
-+#endif
-+
-+ case Opt_ignore:
-+#ifndef CONFIG_AUFS_COMPAT
-+ Warn("ignored %s\n", opt_str);
-+#endif
-+ skipped = 1;
-+ err = 0;
-+ break;
-+ case Opt_err:
-+ Err("unknown option %s\n", opt_str);
-+ break;
-+ }
-+
-+ if (!err && !skipped) {
-+ if (unlikely(++opt > opt_tail)) {
-+ err = -E2BIG;
-+ opt--;
-+ opt->type = Opt_tail;
-+ break;
-+ }
-+ opt->type = Opt_tail;
-+ }
-+ }
-+
-+ dump_opts(opts);
-+ if (unlikely(err))
-+ au_free_opts(opts);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * returns,
-+ * plus: processed without an error
-+ * zero: unprocessed
-+ */
-+static int au_do_opt_simple(struct super_block *sb, struct opt *opt,
-+ int remount, unsigned int *given)
-+{
-+ int err;
-+ struct aufs_sbinfo *sbinfo = stosi(sb);
-+
-+ TraceEnter();
-+
-+ err = 1; /* handled */
-+ switch (opt->type) {
-+ case Opt_udba:
-+ udba_set(sb, opt->udba);
-+ *given |= opt->udba;
-+ break;
-+
-+ case Opt_plink:
-+ au_flag_set(sb, AuFlag_PLINK);
-+ *given |= AuFlag_PLINK;
-+ break;
-+ case Opt_noplink:
-+ if (au_flag_test(sb, AuFlag_PLINK))
-+ au_put_plink(sb);
-+ au_flag_clr(sb, AuFlag_PLINK);
-+ *given |= AuFlag_PLINK;
-+ break;
-+ case Opt_list_plink:
-+ if (au_flag_test(sb, AuFlag_PLINK))
-+ au_list_plink(sb);
-+ break;
-+ case Opt_clean_plink:
-+ if (au_flag_test(sb, AuFlag_PLINK))
-+ au_put_plink(sb);
-+ break;
-+
-+ case Opt_diropq_a:
-+ au_flag_set(sb, AuFlag_ALWAYS_DIROPQ);
-+ *given |= AuFlag_ALWAYS_DIROPQ;
-+ break;
-+ case Opt_diropq_w:
-+ au_flag_clr(sb, AuFlag_ALWAYS_DIROPQ);
-+ *given |= AuFlag_ALWAYS_DIROPQ;
-+ break;
-+
-+ case Opt_dlgt:
-+ au_flag_set(sb, AuFlag_DLGT);
-+ *given |= AuFlag_DLGT;
-+ break;
-+ case Opt_nodlgt:
-+ au_flag_clr(sb, AuFlag_DLGT);
-+ *given |= AuFlag_DLGT;
-+ break;
-+
-+ case Opt_warn_perm:
-+ au_flag_set(sb, AuFlag_WARN_PERM);
-+ *given |= AuFlag_WARN_PERM;
-+ break;
-+ case Opt_nowarn_perm:
-+ au_flag_clr(sb, AuFlag_WARN_PERM);
-+ *given |= AuFlag_WARN_PERM;
-+ break;
-+
-+ case Opt_coo:
-+ coo_set(sb, opt->coo);
-+ *given |= opt->coo;
-+ break;
-+
-+ case Opt_dirwh:
-+ sbinfo->si_dirwh = opt->dirwh;
-+ break;
-+
-+ case Opt_rdcache:
-+ sbinfo->si_rdcache = opt->rdcache * HZ;
-+ break;
-+
-+ default:
-+ err = 0;
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * returns tri-state.
-+ * plus: processed without an error
-+ * zero: unprocessed
-+ * minus: error
-+ */
-+static int au_do_opt_br(struct super_block *sb, struct opt *opt, int remount,
-+ int *do_refresh)
-+{
-+ int err;
-+
-+ TraceEnter();
-+
-+ err = 0;
-+ switch (opt->type) {
-+ case Opt_append:
-+ opt->add.bindex = sbend(sb) + 1;
-+ goto add;
-+ case Opt_prepend:
-+ opt->add.bindex = 0;
-+ add:
-+ case Opt_add:
-+ err = br_add(sb, &opt->add, remount);
-+ if (!err)
-+ *do_refresh = err = 1;
-+ break;
-+
-+ case Opt_del:
-+ case Opt_idel:
-+ err = br_del(sb, &opt->del, remount);
-+ if (!err)
-+ *do_refresh = err = 1;
-+ break;
-+
-+ case Opt_mod:
-+ case Opt_imod:
-+ err = br_mod(sb, &opt->mod, remount, do_refresh);
-+ if (!err)
-+ err = 1;
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int au_do_opt_xino(struct super_block *sb, struct opt *opt, int remount,
-+ struct opt_xino **opt_xino)
-+{
-+ int err;
-+
-+ TraceEnter();
-+
-+ err = 0;
-+ switch (opt->type) {
-+ case Opt_xino:
-+ err = xino_set(sb, &opt->xino, remount);
-+ if (!err)
-+ *opt_xino = &opt->xino;
-+ break;
-+ case Opt_noxino:
-+ err = xino_clr(sb);
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int verify_opts(struct super_block *sb, int remount)
-+{
-+ int err;
-+ aufs_bindex_t bindex, bend;
-+ struct aufs_branch *br;
-+ struct dentry *root;
-+ struct inode *dir;
-+ unsigned int do_plink;
-+
-+ TraceEnter();
-+
-+ if (unlikely(!(sb->s_flags & MS_RDONLY)
-+ && !br_writable(sbr_perm(sb, 0))))
-+ Warn("first branch should be rw\n");
-+
-+ err = 0;
-+ root = sb->s_root;
-+ dir = sb->s_root->d_inode;
-+ do_plink = au_flag_test(sb, AuFlag_PLINK);
-+ bend = sbend(sb);
-+ for (bindex = 0; !err && bindex <= bend; bindex++) {
-+ struct inode *h_dir;
-+ int skip;
-+
-+ skip = 0;
-+ h_dir = au_h_iptr_i(dir, bindex);
-+ br = stobr(sb, bindex);
-+ br_wh_read_lock(br);
-+ switch (br->br_perm) {
-+ case AuBr_RR:
-+ case AuBr_RO:
-+ case AuBr_RRWH:
-+ case AuBr_ROWH:
-+ skip = (!br->br_wh && !br->br_plink);
-+ break;
-+
-+ case AuBr_RWNoLinkWH:
-+ skip = !br->br_wh;
-+ if (skip) {
-+ if (do_plink)
-+ skip = !!br->br_plink;
-+ else
-+ skip = !br->br_plink;
-+ }
-+ break;
-+
-+ case AuBr_RW:
-+ skip = !!br->br_wh;
-+ if (skip) {
-+ if (do_plink)
-+ skip = !!br->br_plink;
-+ else
-+ skip = !br->br_plink;
-+ }
-+ break;
-+
-+ default:
-+ BUG();
-+ }
-+ br_wh_read_unlock(br);
-+
-+ if (skip)
-+ continue;
-+
-+ hdir_lock(h_dir, dir, bindex);
-+ br_wh_write_lock(br);
-+ err = init_wh(au_h_dptr_i(root, bindex), br,
-+ au_nfsmnt(sb, bindex), sb);
-+ br_wh_write_unlock(br);
-+ hdir_unlock(h_dir, dir, bindex);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_do_opts_mount(struct super_block *sb, struct opts *opts)
-+{
-+ int err, do_refresh;
-+ struct inode *dir;
-+ struct opt *opt;
-+ unsigned int flags, given;
-+ struct opt_xino *opt_xino;
-+ aufs_bindex_t bend, bindex;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+ DiMustWriteLock(sb->s_root);
-+ dir = sb->s_root->d_inode;
-+ IiMustWriteLock(dir);
-+
-+ err = 0;
-+ given = 0;
-+ opt_xino = NULL;
-+ opt = opts->opt;
-+ while (err >= 0 && opt->type != Opt_tail)
-+ err = au_do_opt_simple(sb, opt++, /*remount*/0, &given);
-+ if (err > 0)
-+ err = 0;
-+ else if (unlikely(err < 0))
-+ goto out;
-+
-+ /* disable them temporary */
-+ flags = au_flag_test(sb, AuFlag_XINO | AuMask_UDBA | AuFlag_DLGT);
-+ au_flag_clr(sb, AuFlag_XINO | AuFlag_DLGT);
-+ udba_set(sb, AuFlag_UDBA_REVAL);
-+
-+ do_refresh = 0;
-+ opt = opts->opt;
-+ while (err >= 0 && opt->type != Opt_tail)
-+ err = au_do_opt_br(sb, opt++, /*remount*/0, &do_refresh);
-+ if (err > 0)
-+ err = 0;
-+ else if (unlikely(err < 0))
-+ goto out;
-+
-+ bend = sbend(sb);
-+ if (unlikely(bend < 0)) {
-+ err = -EINVAL;
-+ Err("no branches\n");
-+ goto out;
-+ }
-+
-+ if (flags & AuFlag_XINO)
-+ au_flag_set(sb, AuFlag_XINO);
-+ opt = opts->opt;
-+ while (!err && opt->type != Opt_tail)
-+ err = au_do_opt_xino(sb, opt++, /*remount*/0, &opt_xino);
-+ if (unlikely(err))
-+ goto out;
-+
-+ //todo: test this error case.
-+ err = verify_opts(sb, /*remount*/0);
-+ DEBUG_ON(err);
-+ if (unlikely(err))
-+ goto out;
-+
-+ /* enable xino */
-+ if (au_flag_test(sb, AuFlag_XINO) && !opt_xino) {
-+ struct file *xino_file = xino_def(sb);
-+ err = PTR_ERR(xino_file);
-+ if (IS_ERR(xino_file))
-+ goto out;
-+
-+ err = 0;
-+ for (bindex = 0; !err && bindex <= bend; bindex++)
-+ err = xino_init(sb, bindex, xino_file,
-+ /*do_test*/bindex);
-+ fput(xino_file);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+
-+ /* restore hinotify */
-+ udba_set(sb, flags & AuMask_UDBA);
-+ if (flags & AuFlag_UDBA_INOTIFY)
-+ au_reset_hinotify(dir, au_hi_flags(dir, 1) & ~AUFS_HI_XINO);
-+
-+ /* restore dlgt */
-+ if (flags & AuFlag_DLGT)
-+ au_flag_set(sb, AuFlag_DLGT);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_do_opts_remount(struct super_block *sb, struct opts *opts,
-+ int *do_refresh, unsigned int *given)
-+{
-+ int err, rerr;
-+ struct inode *dir;
-+ struct opt_xino *opt_xino;
-+ struct opt *opt;
-+ unsigned int dlgt;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+ DiMustWriteLock(sb->s_root);
-+ dir = sb->s_root->d_inode;
-+ IiMustWriteLock(dir);
-+ //DEBUG_ON(au_flag_test(sb, AuFlag_UDBA_INOTIFY));
-+
-+ err = 0;
-+ *do_refresh = 0;
-+ *given = 0;
-+ dlgt = au_flag_test(sb, AuFlag_DLGT);
-+ opt_xino = NULL;
-+ opt = opts->opt;
-+ while (err >= 0 && opt->type != Opt_tail) {
-+ err = au_do_opt_simple(sb, opt, /*remount*/1, given);
-+
-+ /* disable it temporary */
-+ dlgt = au_flag_test(sb, AuFlag_DLGT);
-+ au_flag_clr(sb, AuFlag_DLGT);
-+
-+ if (!err)
-+ err = au_do_opt_br(sb, opt, /*remount*/1, do_refresh);
-+ if (!err)
-+ err = au_do_opt_xino(sb, opt, /*remount*/1, &opt_xino);
-+
-+ /* restore it */
-+ au_flag_set(sb, dlgt);
-+ opt++;
-+ }
-+ if (err > 0)
-+ err = 0;
-+ TraceErr(err);
-+
-+ /* go on if err */
-+
-+ //todo: test this error case.
-+ au_flag_clr(sb, AuFlag_DLGT);
-+ rerr = verify_opts(sb, /*remount*/1);
-+ au_flag_set(sb, dlgt);
-+
-+ /* they are handled by the caller */
-+ if (!*do_refresh)
-+ *do_refresh = !!((*given & AuMask_UDBA)
-+ || au_flag_test(sb, AuFlag_XINO));
-+
-+ TraceErr(err);
-+ return err;
-+}
-diff --git a/fs/aufs/opts.h b/fs/aufs/opts.h
-new file mode 100755
-index 0000000..16c1a6a
---- /dev/null
-+++ b/fs/aufs/opts.h
-@@ -0,0 +1,96 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: opts.h,v 1.13 2007/05/14 06:27:18 sfjro Exp $ */
-+
-+#ifndef __AUFS_OPTS_H__
-+#define __AUFS_OPTS_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/namei.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-+typedef const char* au_parser_pattern_t;
-+#else
-+typedef char* au_parser_pattern_t;
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct opt_add {
-+ aufs_bindex_t bindex;
-+ char *path;
-+ int perm;
-+ struct nameidata nd;
-+};
-+
-+struct opt_del {
-+ char *path;
-+ struct dentry *h_root;
-+};
-+
-+struct opt_mod {
-+ char *path;
-+ int perm;
-+ struct dentry *h_root;
-+};
-+
-+struct opt_xino {
-+ char *path;
-+ struct file *file;
-+};
-+
-+struct opt {
-+ int type;
-+ union {
-+ struct opt_xino xino;
-+ struct opt_add add;
-+ struct opt_del del;
-+ struct opt_mod mod;
-+ int dirwh;
-+ int rdcache;
-+ int deblk;
-+ int nhash;
-+ int udba;
-+ int coo;
-+ };
-+};
-+
-+struct opts {
-+ struct opt *opt;
-+ int max_opt;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int br_perm_str(char *p, unsigned int len, int brperm);
-+au_parser_pattern_t udba_str(int udba);
-+void udba_set(struct super_block *sb, unsigned int flg);
-+//au_parser_pattern_t coo_str(int coo);
-+void au_free_opts(struct opts *opts);
-+int au_parse_opts(struct super_block *sb, char *str, struct opts *opts);
-+int au_do_opts_mount(struct super_block *sb, struct opts *opts);
-+int au_do_opts_remount(struct super_block *sb, struct opts *opts,
-+ int *do_refresh, unsigned int *given);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_OPTS_H__ */
-diff --git a/fs/aufs/plink.c b/fs/aufs/plink.c
-new file mode 100755
-index 0000000..0e520af
---- /dev/null
-+++ b/fs/aufs/plink.c
-@@ -0,0 +1,331 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: plink.c,v 1.4 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+struct pseudo_link {
-+ struct list_head list;
-+ struct inode *inode;
-+};
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+void au_list_plink(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink;
-+
-+ TraceEnter();
-+ SiMustAnyLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry(plink, plink_list, list)
-+ Dbg("%lu\n", plink->inode->i_ino);
-+ spin_unlock(&sbinfo->si_plink_lock);
-+}
-+#endif
-+
-+int au_is_plinked(struct super_block *sb, struct inode *inode)
-+{
-+ int found;
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ SiMustAnyLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ found = 0;
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry(plink, plink_list, list)
-+ if (plink->inode == inode) {
-+ found = 1;
-+ break;
-+ }
-+ spin_unlock(&sbinfo->si_plink_lock);
-+ return found;
-+}
-+
-+// 20 is max digits length of ulong 64
-+#define PLINK_NAME_LEN ((20 + 1) * 2)
-+
-+static int plink_name(char *name, int len, struct inode *inode,
-+ aufs_bindex_t bindex)
-+{
-+ int rlen;
-+ struct inode *h_inode;
-+
-+ LKTRTrace("i%lu, b%d\n", inode->i_ino, bindex);
-+ DEBUG_ON(len != PLINK_NAME_LEN);
-+ h_inode = au_h_iptr_i(inode, bindex);
-+ DEBUG_ON(!h_inode);
-+ rlen = snprintf(name, len, "%lu.%lu", inode->i_ino, h_inode->i_ino);
-+ DEBUG_ON(rlen >= len);
-+ return rlen;
-+}
-+
-+struct dentry *lkup_plink(struct super_block *sb, aufs_bindex_t bindex,
-+ struct inode *inode)
-+{
-+ struct dentry *h_dentry, *h_parent;
-+ struct aufs_branch *br;
-+ struct inode *h_dir;
-+ char tgtname[PLINK_NAME_LEN];
-+ int len;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("b%d, i%lu\n", bindex, inode->i_ino);
-+ br = stobr(sb, bindex);
-+ h_parent = br->br_plink;
-+ DEBUG_ON(!h_parent);
-+ h_dir = h_parent->d_inode;
-+ DEBUG_ON(!h_dir);
-+
-+ len = plink_name(tgtname, sizeof(tgtname), inode, bindex);
-+
-+ // always superio.
-+ lkup.nfsmnt = au_do_nfsmnt(br->br_mnt);
-+ lkup.dlgt = need_dlgt(sb);
-+ hi_lock_whplink(h_dir);
-+ h_dentry = sio_lkup_one(tgtname, h_parent, len, &lkup);
-+ i_unlock(h_dir);
-+ return h_dentry;
-+}
-+
-+static int do_whplink(char *tgt, int len, struct dentry *h_parent,
-+ struct dentry *h_dentry, struct vfsmount *nfsmnt,
-+ struct super_block *sb)
-+{
-+ int err;
-+ struct dentry *h_tgt;
-+ struct inode *h_dir;
-+ struct lkup_args lkup = {
-+ .nfsmnt = nfsmnt,
-+ .dlgt = need_dlgt(sb)
-+ };
-+
-+ h_tgt = lkup_one(tgt, h_parent, len, &lkup);
-+ err = PTR_ERR(h_tgt);
-+ if (IS_ERR(h_tgt))
-+ goto out;
-+
-+ err = 0;
-+ h_dir = h_parent->d_inode;
-+ if (unlikely(h_tgt->d_inode && h_tgt->d_inode != h_dentry->d_inode))
-+ err = vfsub_unlink(h_dir, h_tgt, lkup.dlgt);
-+ if (!err && !h_tgt->d_inode) {
-+ err = vfsub_link(h_dentry, h_dir, h_tgt, lkup.dlgt);
-+ //inode->i_nlink++;
-+ }
-+ dput(h_tgt);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct do_whplink_args {
-+ int *errp;
-+ char *tgt;
-+ int len;
-+ struct dentry *h_parent;
-+ struct dentry *h_dentry;
-+ struct vfsmount *nfsmnt;
-+ struct super_block *sb;
-+};
-+
-+static void call_do_whplink(void *args)
-+{
-+ struct do_whplink_args *a = args;
-+ *a->errp = do_whplink(a->tgt, a->len, a->h_parent, a->h_dentry,
-+ a->nfsmnt, a->sb);
-+}
-+
-+static int whplink(struct dentry *h_dentry, struct inode *inode,
-+ aufs_bindex_t bindex, struct super_block *sb)
-+{
-+ int err, len;
-+ struct aufs_branch *br;
-+ struct dentry *h_parent;
-+ struct inode *h_dir;
-+ char tgtname[PLINK_NAME_LEN];
-+
-+ LKTRTrace("%.*s\n", DLNPair(h_dentry));
-+ br = stobr(inode->i_sb, bindex);
-+ h_parent = br->br_plink;
-+ DEBUG_ON(!h_parent);
-+ h_dir = h_parent->d_inode;
-+ DEBUG_ON(!h_dir);
-+
-+ len = plink_name(tgtname, sizeof(tgtname), inode, bindex);
-+
-+ // always superio.
-+ hi_lock_whplink(h_dir);
-+ if (!is_au_wkq(current)) {
-+ struct do_whplink_args args = {
-+ .errp = &err,
-+ .tgt = tgtname,
-+ .len = len,
-+ .h_parent = h_parent,
-+ .h_dentry = h_dentry,
-+ .nfsmnt = au_do_nfsmnt(br->br_mnt),
-+ .sb = sb
-+ };
-+ au_wkq_wait(call_do_whplink, &args, /*dlgt*/0);
-+ } else
-+ err = do_whplink(tgtname, len, h_parent, h_dentry,
-+ au_do_nfsmnt(br->br_mnt), sb);
-+ i_unlock(h_dir);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+void append_plink(struct super_block *sb, struct inode *inode,
-+ struct dentry *h_dentry, aufs_bindex_t bindex)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink;
-+ int found, err, cnt;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ SiMustAnyLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ cnt = 0;
-+ found = 0;
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry(plink, plink_list, list) {
-+ cnt++;
-+ if (plink->inode == inode) {
-+ found = 1;
-+ break;
-+ }
-+ }
-+
-+ err = 0;
-+ if (!found) {
-+ struct pseudo_link *plink;
-+
-+ plink = kmalloc(sizeof(*plink), GFP_ATOMIC);
-+ if (plink) {
-+ plink->inode = igrab(inode);
-+ list_add(&plink->list, plink_list);
-+ cnt++;
-+ } else
-+ err = -ENOMEM;
-+ }
-+ spin_unlock(&sbinfo->si_plink_lock);
-+
-+ if (!err)
-+ err = whplink(h_dentry, inode, bindex, sb);
-+
-+ if (unlikely(cnt > 100))
-+ Warn1("unexpectedly many pseudo links, %d\n", cnt);
-+ if (unlikely(err))
-+ Warn("err %d, damaged pseudo link. ignored.\n", err);
-+}
-+
-+static void do_put_plink(struct pseudo_link *plink, int do_del)
-+{
-+ TraceEnter();
-+
-+ iput(plink->inode);
-+ if (do_del)
-+ list_del(&plink->list);
-+ kfree(plink);
-+}
-+
-+void au_put_plink(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink, *tmp;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ //spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry_safe(plink, tmp, plink_list, list)
-+ do_put_plink(plink, 0);
-+ INIT_LIST_HEAD(plink_list);
-+ //spin_unlock(&sbinfo->si_plink_lock);
-+}
-+
-+void half_refresh_plink(struct super_block *sb, aufs_bindex_t br_id)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink, *tmp;
-+ struct inode *inode;
-+ aufs_bindex_t bstart, bend, bindex;
-+ int do_put;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ //spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry_safe(plink, tmp, plink_list, list) {
-+ do_put = 0;
-+ inode = igrab(plink->inode);
-+ ii_write_lock_child(inode);
-+ bstart = ibstart(inode);
-+ bend = ibend(inode);
-+ if (bstart >= 0) {
-+ for (bindex = bstart; bindex <= bend; bindex++) {
-+ if (!au_h_iptr_i(inode, bindex)
-+ || itoid_index(inode, bindex) != br_id)
-+ continue;
-+ set_h_iptr(inode, bindex, NULL, 0);
-+ do_put = 1;
-+ break;
-+ }
-+ } else
-+ do_put_plink(plink, 1);
-+
-+ if (do_put) {
-+ for (bindex = bstart; bindex <= bend; bindex++)
-+ if (au_h_iptr_i(inode, bindex)) {
-+ do_put = 0;
-+ break;
-+ }
-+ if (do_put)
-+ do_put_plink(plink, 1);
-+ }
-+ ii_write_unlock(inode);
-+ iput(inode);
-+ }
-+ //spin_unlock(&sbinfo->si_plink_lock);
-+}
-diff --git a/fs/aufs/sbinfo.c b/fs/aufs/sbinfo.c
-new file mode 100755
-index 0000000..55cb64c
---- /dev/null
-+++ b/fs/aufs/sbinfo.c
-@@ -0,0 +1,173 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: sbinfo.c,v 1.30 2007/05/14 03:39:31 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+struct aufs_sbinfo *stosi(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ sbinfo = sb->s_fs_info;
-+ //DEBUG_ON(sbinfo->si_bend < 0);
-+ return sbinfo;
-+}
-+
-+aufs_bindex_t sbend(struct super_block *sb)
-+{
-+ SiMustAnyLock(sb);
-+ return stosi(sb)->si_bend;
-+}
-+
-+struct aufs_branch *stobr(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ SiMustAnyLock(sb);
-+ DEBUG_ON(bindex < 0 || sbend(sb) < bindex
-+ || !stosi(sb)->si_branch[0 + bindex]);
-+ return stosi(sb)->si_branch[0 + bindex];
-+}
-+
-+int au_sigen(struct super_block *sb)
-+{
-+ SiMustAnyLock(sb);
-+ return stosi(sb)->si_generation;
-+}
-+
-+int au_sigen_inc(struct super_block *sb)
-+{
-+ int gen;
-+
-+ SiMustWriteLock(sb);
-+ gen = ++stosi(sb)->si_generation;
-+ au_update_digen(sb->s_root);
-+ au_update_iigen(sb->s_root->d_inode);
-+ sb->s_root->d_inode->i_version++;
-+ return gen;
-+}
-+
-+int find_bindex(struct super_block *sb, struct aufs_branch *br)
-+{
-+ aufs_bindex_t bindex, bend;
-+
-+ bend = sbend(sb);
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (stobr(sb, bindex) == br)
-+ return bindex;
-+ return -1;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* dentry and super_block lock. call at entry point */
-+void aufs_read_lock(struct dentry *dentry, int flags)
-+{
-+ si_read_lock(dentry->d_sb);
-+ if (flags & AUFS_D_WLOCK)
-+ di_write_lock_child(dentry);
-+ else
-+ di_read_lock_child(dentry, flags);
-+}
-+
-+void aufs_read_unlock(struct dentry *dentry, int flags)
-+{
-+ if (flags & AUFS_D_WLOCK)
-+ di_write_unlock(dentry);
-+ else
-+ di_read_unlock(dentry, flags);
-+ si_read_unlock(dentry->d_sb);
-+}
-+
-+void aufs_write_lock(struct dentry *dentry)
-+{
-+ //au_wkq_wait_nwtask();
-+ si_write_lock(dentry->d_sb);
-+ di_write_lock_child(dentry);
-+}
-+
-+void aufs_write_unlock(struct dentry *dentry)
-+{
-+ di_write_unlock(dentry);
-+ si_write_unlock(dentry->d_sb);
-+ //au_wkq_wait_nwtask();
-+}
-+
-+void aufs_read_and_write_lock2(struct dentry *d1, struct dentry *d2, int isdir)
-+{
-+ DEBUG_ON(d1 == d2 || d1->d_sb != d2->d_sb);
-+ si_read_lock(d1->d_sb);
-+ di_write_lock2_child(d1, d2, isdir);
-+}
-+
-+void aufs_read_and_write_unlock2(struct dentry *d1, struct dentry *d2)
-+{
-+ DEBUG_ON(d1 == d2 || d1->d_sb != d2->d_sb);
-+ di_write_unlock2(d1, d2);
-+ si_read_unlock(d1->d_sb);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+aufs_bindex_t new_br_id(struct super_block *sb)
-+{
-+ aufs_bindex_t br_id;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+
-+ while (1) {
-+ br_id = ++stosi(sb)->si_last_br_id;
-+ if (br_id && find_brindex(sb, br_id) < 0)
-+ return br_id;
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_SYSAUFS
-+static int make_xino(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size)
-+{
-+ int err;
-+ struct super_block *sb = args->sb;
-+ aufs_bindex_t bindex, bend;
-+ struct file *xf;
-+ struct inode *xi;
-+
-+ TraceEnter();
-+ DEBUG_ON(args->index != SysaufsSb_XINO);
-+ SiMustReadLock(sb);
-+
-+ *do_size = 0;
-+ err = seq_printf(seq, "%d %lu\n", sizeof(struct xino),
-+ atomic_long_read(&stosi(sb)->si_xino));
-+ bend = sbend(sb);
-+ for (bindex = 0; !err && bindex <= bend; bindex++) {
-+ xf = stobr(sb, bindex)->br_xino;
-+ xi = xf->f_dentry->d_inode;
-+ err = seq_printf(seq, "%d: %d, %Lux%d %Ld\n",
-+ bindex, file_count(xf),
-+ (u64)xi->i_blocks, 1 << xi->i_blkbits,
-+ i_size_read(xi));
-+ }
-+ return err;
-+}
-+
-+sysaufs_op au_si_ops[] = {
-+ [SysaufsSb_XINO] = make_xino
-+};
-+#endif
-diff --git a/fs/aufs/super.c b/fs/aufs/super.c
-new file mode 100755
-index 0000000..c1123f8
---- /dev/null
-+++ b/fs/aufs/super.c
-@@ -0,0 +1,716 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: super.c,v 1.50 2007/05/14 03:39:42 sfjro Exp $ */
-+
-+#include <linux/module.h>
-+#include <linux/seq_file.h>
-+#include <linux/statfs.h>
-+#include "aufs.h"
-+
-+/*
-+ * super_operations
-+ */
-+static struct inode *aufs_alloc_inode(struct super_block *sb)
-+{
-+ struct aufs_icntnr *c;
-+
-+ TraceEnter();
-+
-+ c = cache_alloc_icntnr();
-+ //if (LktrCond) {cache_free_icntnr(c); c = NULL;}
-+ if (c) {
-+ inode_init_once(&c->vfs_inode);
-+ c->vfs_inode.i_version = 1; //sigen(sb);
-+ c->iinfo.ii_hinode = NULL;
-+ return &c->vfs_inode;
-+ }
-+ return NULL;
-+}
-+
-+static void aufs_destroy_inode(struct inode *inode)
-+{
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ au_iinfo_fin(inode);
-+ cache_free_icntnr(container_of(inode, struct aufs_icntnr, vfs_inode));
-+}
-+
-+//todo: how about merge with alloc_inode()?
-+static void aufs_read_inode(struct inode *inode)
-+{
-+ int err;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+
-+ err = au_iinfo_init(inode);
-+ //if (LktrCond) err = -1;
-+ if (!err) {
-+ inode->i_version++;
-+ inode->i_op = &aufs_iop;
-+ inode->i_fop = &aufs_file_fop;
-+ inode->i_mapping->a_ops = &aufs_aop;
-+ return; /* success */
-+ }
-+
-+ LKTRTrace("intializing inode info failed(%d)\n", err);
-+ make_bad_inode(inode);
-+}
-+
-+int au_show_brs(struct seq_file *seq, struct super_block *sb)
-+{
-+ int err;
-+ aufs_bindex_t bindex, bend;
-+ char a[16];
-+ struct dentry *root;
-+
-+ TraceEnter();
-+ SiMustAnyLock(sb);
-+ root = sb->s_root;
-+ DiMustAnyLock(root);
-+
-+ err = 0;
-+ bend = sbend(sb);
-+ for (bindex = 0; !err && bindex <= bend; bindex++) {
-+ err = br_perm_str(a, sizeof(a), sbr_perm(sb, bindex));
-+ if (!err)
-+ err = seq_path(seq, sbr_mnt(sb, bindex),
-+ au_h_dptr_i(root, bindex), au_esc_chars);
-+ if (err > 0)
-+ err = seq_printf(seq, "=%s", a);
-+ if (!err && bindex != bend)
-+ err = seq_putc(seq, ':');
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int aufs_show_options(struct seq_file *m, struct vfsmount *mnt)
-+{
-+ int err, n;
-+ struct super_block *sb;
-+ struct aufs_sbinfo *sbinfo;
-+ struct dentry *root;
-+ struct file *xino;
-+
-+ TraceEnter();
-+
-+ sb = mnt->mnt_sb;
-+ root = sb->s_root;
-+ aufs_read_lock(root, !AUFS_I_RLOCK);
-+ if (au_flag_test(sb, AuFlag_XINO)) {
-+ err = seq_puts(m, ",xino=");
-+ if (unlikely(err))
-+ goto out;
-+ xino = stobr(sb, 0)->br_xino;
-+ err = seq_path(m, xino->f_vfsmnt, xino->f_dentry, au_esc_chars);
-+ if (unlikely(err <= 0))
-+ goto out;
-+ err = 0;
-+
-+#define Deleted "\\040(deleted)"
-+ m->count -= sizeof(Deleted) - 1;
-+ DEBUG_ON(memcmp(m->buf + m->count, Deleted,
-+ sizeof(Deleted) - 1));
-+#undef Deleted
-+ } else
-+ err = seq_puts(m, ",noxino");
-+
-+ n = au_flag_test(sb, AuFlag_PLINK);
-+ if (unlikely(!err && (AuDefFlags & AuFlag_PLINK) != n))
-+ err = seq_printf(m, ",%splink", n ? "" : "no");
-+ n = au_flag_test_udba(sb);
-+ if (unlikely(!err && (AuDefFlags & AuMask_UDBA) != n))
-+ err = seq_printf(m, ",udba=%s", udba_str(n));
-+ n = au_flag_test(sb, AuFlag_ALWAYS_DIROPQ);
-+ if (unlikely(!err && (AuDefFlags & AuFlag_ALWAYS_DIROPQ) != n))
-+ err = seq_printf(m, ",diropq=%c", n ? 'a' : 'w');
-+ n = au_flag_test(sb, AuFlag_DLGT);
-+ if (unlikely(!err && (AuDefFlags & AuFlag_DLGT) != n))
-+ err = seq_printf(m, ",%sdlgt", n ? "" : "no");
-+ n = au_flag_test(sb, AuFlag_WARN_PERM);
-+ if (unlikely(!err && (AuDefFlags & AuFlag_WARN_PERM) != n))
-+ err = seq_printf(m, ",%swarn_perm", n ? "" : "no");
-+
-+ sbinfo = stosi(sb);
-+ n = sbinfo->si_dirwh;
-+ if (unlikely(!err && n != AUFS_DIRWH_DEF))
-+ err = seq_printf(m, ",dirwh=%d", n);
-+ n = sbinfo->si_rdcache / HZ;
-+ if (unlikely(!err && n != AUFS_RDCACHE_DEF))
-+ err = seq_printf(m, ",rdcache=%d", n);
-+#if 0
-+ n = au_flag_test_coo(sb);
-+ if (unlikely(!err && (AuDefFlags & AuMask_COO) != n))
-+ err = seq_printf(m, ",coo=%s", coo_str(n));
-+#endif
-+
-+ if (!err && !sysaufs_brs) {
-+#ifdef CONFIG_AUFS_COMPAT
-+ err = seq_puts(m, ",dirs=");
-+#else
-+ err = seq_puts(m, ",br:");
-+#endif
-+ if (!err)
-+ err = au_show_brs(m, sb);
-+ }
-+
-+ out:
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ TraceErr(err);
-+ if (err)
-+ err = -E2BIG;
-+ TraceErr(err);
-+ return err;
-+}
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+#define StatfsLock(d) aufs_read_lock((d)->d_sb->s_root, 0)
-+#define StatfsUnlock(d) aufs_read_unlock((d)->d_sb->s_root, 0)
-+#define StatfsArg(d) au_h_dptr((d)->d_sb->s_root)
-+#define StatfsHInode(d) (StatfsArg(d)->d_inode)
-+#define StatfsSb(d) ((d)->d_sb)
-+static int aufs_statfs(struct dentry *arg, struct kstatfs *buf)
-+#else
-+#define StatfsLock(s) si_read_lock(s)
-+#define StatfsUnlock(s) si_read_unlock(s)
-+#define StatfsArg(s) sbr_sb(s, 0)
-+#define StatfsHInode(s) (StatfsArg(s)->s_root->d_inode)
-+#define StatfsSb(s) (s)
-+static int aufs_statfs(struct super_block *arg, struct kstatfs *buf)
-+#endif
-+{
-+ int err;
-+
-+ TraceEnter();
-+
-+ StatfsLock(arg);
-+ err = vfsub_statfs(StatfsArg(arg), buf, need_dlgt(StatfsSb(arg)));
-+ //if (LktrCond) err = -1;
-+ StatfsUnlock(arg);
-+ if (!err) {
-+ //buf->f_type = AUFS_SUPER_MAGIC;
-+ buf->f_type = 0;
-+ buf->f_namelen -= AUFS_WH_PFX_LEN;
-+ memset(&buf->f_fsid, 0, sizeof(buf->f_fsid));
-+ }
-+ //buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18) || defined(UbuntuEdgy17Umount18)
-+#define UmountBeginSb(mnt) (mnt)->mnt_sb
-+static void aufs_umount_begin(struct vfsmount *arg, int flags)
-+#else
-+#define UmountBeginSb(sb) sb
-+static void aufs_umount_begin(struct super_block *arg)
-+#endif
-+{
-+ struct super_block *sb = UmountBeginSb(arg);
-+
-+ if (unlikely(!stosi(sb)))
-+ return;
-+
-+ //au_wkq_wait_nwtask();
-+ si_write_lock(sb);
-+ if (au_flag_test(sb, AuFlag_PLINK)) {
-+ au_put_plink(sb);
-+ //kobj_umount(stosi(sb));
-+ }
-+#if 0
-+ if (unlikely(au_flag_test(sb, AuFlag_UDBA_INOTIFY)))
-+ shrink_dcache_sb(sb);
-+#endif
-+ si_write_unlock(sb);
-+}
-+
-+static void free_sbinfo(struct aufs_sbinfo *sbinfo)
-+{
-+ TraceEnter();
-+ DEBUG_ON(!sbinfo
-+ || !list_empty(&sbinfo->si_plink));
-+
-+ free_branches(sbinfo);
-+ kfree(sbinfo->si_branch);
-+ kfree(sbinfo);
-+}
-+
-+/* final actions when unmounting a file system */
-+static void aufs_put_super(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+
-+ sbinfo = stosi(sb);
-+ if (unlikely(!sbinfo))
-+ return;
-+
-+ sysaufs_del(sbinfo);
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && !defined(UbuntuEdgy17Umount18)
-+ // umount_begin() may not be called.
-+ aufs_umount_begin(sb);
-+#endif
-+ free_sbinfo(sbinfo);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * refresh directories at remount time.
-+ */
-+static int do_refresh_dir(struct dentry *dentry, unsigned int flags)
-+{
-+ int err;
-+ struct dentry *parent;
-+ struct inode *inode;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode || !S_ISDIR(inode->i_mode));
-+
-+ di_write_lock_child(dentry);
-+ parent = dget_parent(dentry);
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ err = au_refresh_hdentry(dentry, S_IFDIR);
-+ if (err >= 0) {
-+ err = au_refresh_hinode(inode, dentry);
-+ if (!err)
-+ au_reset_hinotify(inode, flags);
-+ }
-+ if (unlikely(err))
-+ Err("unrecoverable error %d\n", err);
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ dput(parent);
-+ di_write_unlock(dentry);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int test_dir(struct dentry *dentry, void *arg)
-+{
-+ return S_ISDIR(dentry->d_inode->i_mode);
-+}
-+
-+static int refresh_dir(struct dentry *root, int sgen)
-+{
-+ int err, i, j, ndentry;
-+ const unsigned int flags = au_hi_flags(root->d_inode, /*isdir*/1);
-+ struct au_dcsub_pages dpages;
-+ struct au_dpage *dpage;
-+ struct dentry **dentries;
-+
-+ LKTRTrace("sgen %d\n", sgen);
-+ SiMustWriteLock(root->d_sb);
-+ DEBUG_ON(au_digen(root) != sgen);
-+ DiMustWriteLock(root);
-+
-+ err = au_dpages_init(&dpages, GFP_KERNEL);
-+ if (unlikely(err))
-+ goto out;
-+ err = au_dcsub_pages(&dpages, root, test_dir, NULL);
-+ if (unlikely(err))
-+ goto out_dpages;
-+
-+ DiMustNoWaiters(root);
-+ IiMustNoWaiters(root->d_inode);
-+ di_write_unlock(root);
-+ for (i = 0; !err && i < dpages.ndpage; i++) {
-+ dpage = dpages.dpages + i;
-+ dentries = dpage->dentries;
-+ ndentry = dpage->ndentry;
-+ for (j = 0; !err && j < ndentry; j++) {
-+ struct dentry *d;
-+ d = dentries[j];
-+ DEBUG_ON(!S_ISDIR(d->d_inode->i_mode)
-+ || IS_ROOT(d)
-+ || au_digen(d->d_parent) != sgen);
-+ if (au_digen(d) != sgen)
-+ err = do_refresh_dir(d, flags);
-+ }
-+ }
-+ di_write_lock_child(root); /* aufs_write_lock() calls ..._child() */
-+
-+ out_dpages:
-+ au_dpages_free(&dpages);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* stop extra interpretation of errno in mount(8), and strange error messages */
-+static int cvt_err(int err)
-+{
-+ TraceErr(err);
-+
-+ switch (err) {
-+ case -ENOENT:
-+ case -ENOTDIR:
-+ case -EEXIST:
-+ case -EIO:
-+ err = -EINVAL;
-+ }
-+ return err;
-+}
-+
-+/* protected by s_umount */
-+static int aufs_remount_fs(struct super_block *sb, int *flags, char *data)
-+{
-+ int err, do_refresh;
-+ struct dentry *root;
-+ struct inode *inode;
-+ struct opts opts;
-+ unsigned int given, dlgt;
-+
-+ //au_debug_on();
-+ LKTRTrace("flags 0x%x, data %s, len %d\n",
-+ *flags, data ? data : "NULL", data ? strlen(data) : 0);
-+
-+ err = 0;
-+ if (unlikely(!data || !*data))
-+ goto out; /* success */
-+
-+ err = -ENOMEM;
-+ memset(&opts, 0, sizeof(opts));
-+ opts.opt = (void*)__get_free_page(GFP_KERNEL);
-+ //if (LktrCond) {free_page((unsigned long)opts.opt); opts.opt = NULL;}
-+ if (unlikely(!opts.opt))
-+ goto out;
-+ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt);
-+
-+ /* parse it before aufs lock */
-+ err = au_parse_opts(sb, data, &opts);
-+ //if (LktrCond) {au_free_opts(&opts); err = -1;}
-+ if (unlikely(err))
-+ goto out_opts;
-+
-+ root = sb->s_root;
-+ inode = root->d_inode;
-+ i_lock(inode);
-+ aufs_write_lock(root);
-+
-+ //DbgSleep(3);
-+
-+ /* au_do_opts() may return an error */
-+ do_refresh = 0;
-+ given = 0;
-+ err = au_do_opts_remount(sb, &opts, &do_refresh, &given);
-+ //if (LktrCond) err = -1;
-+ au_free_opts(&opts);
-+
-+ if (do_refresh) {
-+ int rerr;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ dlgt = au_flag_test(sb, AuFlag_DLGT);
-+ au_flag_clr(sb, AuFlag_DLGT);
-+ au_sigen_inc(sb);
-+ au_reset_hinotify(inode, au_hi_flags(inode, /*isdir*/1));
-+ sbinfo = stosi(sb);
-+ sbinfo->si_failed_refresh_dirs = 0;
-+ rerr = refresh_dir(root, au_sigen(sb));
-+ if (unlikely(rerr)) {
-+ sbinfo->si_failed_refresh_dirs = 1;
-+ Warn("Refreshing directories failed, ignores (%d)\n",
-+ rerr);
-+ }
-+ au_cpup_attr_all(inode);
-+ au_flag_set(sb, dlgt);
-+ }
-+
-+ aufs_write_unlock(root);
-+ i_unlock(inode);
-+ /* braces are added to stop a warning */
-+ if (do_refresh) {
-+ sysaufs_notify_remount();
-+ }
-+
-+ out_opts:
-+ free_page((unsigned long)opts.opt);
-+ out:
-+ err = cvt_err(err);
-+ TraceErr(err);
-+ //au_debug_off();
-+ return err;
-+}
-+
-+static struct super_operations aufs_sop = {
-+ .alloc_inode = aufs_alloc_inode,
-+ .destroy_inode = aufs_destroy_inode,
-+ .read_inode = aufs_read_inode,
-+ //.dirty_inode = aufs_dirty_inode,
-+ //.write_inode = aufs_write_inode,
-+ //void (*put_inode) (struct inode *);
-+ .drop_inode = generic_delete_inode,
-+ //.delete_inode = aufs_delete_inode,
-+ //.clear_inode = aufs_clear_inode,
-+
-+ .show_options = aufs_show_options,
-+ .statfs = aufs_statfs,
-+
-+ .put_super = aufs_put_super,
-+ //void (*write_super) (struct super_block *);
-+ //int (*sync_fs)(struct super_block *sb, int wait);
-+ //void (*write_super_lockfs) (struct super_block *);
-+ //void (*unlockfs) (struct super_block *);
-+ .remount_fs = aufs_remount_fs,
-+ // depends upon umount flags. also use put_super() (< 2.6.18)
-+ .umount_begin = aufs_umount_begin
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * at first mount time.
-+ */
-+
-+static int alloc_sbinfo(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+
-+ sbinfo = kmalloc(sizeof(*sbinfo), GFP_KERNEL);
-+ //if (LktrCond) {kfree(sbinfo); sbinfo = NULL;}
-+ if (unlikely(!sbinfo))
-+ goto out;
-+ sbinfo->si_branch = kzalloc(sizeof(*sbinfo->si_branch), GFP_KERNEL);
-+ //if (LktrCond) {kfree(sbinfo->si_branch); sbinfo->si_branch = NULL;}
-+ if (unlikely(!sbinfo->si_branch)) {
-+ kfree(sbinfo);
-+ goto out;
-+ }
-+ rw_init_wlock(&sbinfo->si_rwsem);
-+ sbinfo->si_bend = -1;
-+ atomic_long_set(&sbinfo->si_xino, AUFS_FIRST_INO);
-+ spin_lock_init(&sbinfo->si_plink_lock);
-+ INIT_LIST_HEAD(&sbinfo->si_plink);
-+ init_lvma(sbinfo);
-+ sbinfo->si_generation = 0;
-+ sbinfo->si_last_br_id = 0;
-+ sbinfo->si_failed_refresh_dirs = 0;
-+ sbinfo->si_flags = 0;
-+ sbinfo->si_dirwh = AUFS_DIRWH_DEF;
-+ sbinfo->si_rdcache = AUFS_RDCACHE_DEF * HZ;
-+ //atomic_set(&sbinfo->si_hinotify, 0);
-+ //init_waitqueue_head(&sbinfo->si_hinotify_wq);
-+
-+ sb->s_fs_info = sbinfo;
-+ au_flag_set(sb, AuDefFlags);
-+#ifdef ForceInotify
-+ udba_set(sb, AuFlag_UDBA_INOTIFY);
-+#endif
-+#ifdef ForceDlgt
-+ au_flag_set(sb, AuFlag_DLGT);
-+#endif
-+#ifdef ForceNoPlink
-+ au_flag_clr(sb, AuFlag_PLINK);
-+#endif
-+ return 0; /* success */
-+
-+ out:
-+ TraceErr(-ENOMEM);
-+ return -ENOMEM;
-+}
-+
-+static int alloc_root(struct super_block *sb)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct dentry *root;
-+
-+ TraceEnter();
-+
-+ err = -ENOMEM;
-+ inode = iget(sb, AUFS_ROOT_INO);
-+ //if (LktrCond) {iput(inode); inode = NULL;}
-+ if (unlikely(!inode))
-+ goto out;
-+ err = PTR_ERR(inode);
-+ if (IS_ERR(inode))
-+ goto out;
-+ err = -ENOMEM;
-+ if (unlikely(is_bad_inode(inode)))
-+ goto out_iput;
-+
-+ root = d_alloc_root(inode);
-+ //if (LktrCond) {igrab(inode); dput(root); root = NULL;}
-+ if (unlikely(!root))
-+ goto out_iput;
-+ err = PTR_ERR(root);
-+ if (IS_ERR(root))
-+ goto out_iput;
-+
-+ err = au_alloc_dinfo(root);
-+ //if (LktrCond){rw_write_unlock(&dtodi(root)->di_rwsem);err=-1;}
-+ if (!err) {
-+ sb->s_root = root;
-+ return 0; /* success */
-+ }
-+ dput(root);
-+ goto out; /* do not iput */
-+
-+ out_iput:
-+ iput(inode);
-+ out:
-+ TraceErr(err);
-+ return err;
-+
-+}
-+
-+static int aufs_fill_super(struct super_block *sb, void *raw_data, int silent)
-+{
-+ int err;
-+ struct dentry *root;
-+ struct inode *inode;
-+ struct opts opts;
-+ char *arg = raw_data;
-+
-+ //au_debug_on();
-+ if (unlikely(!arg || !*arg)) {
-+ err = -EINVAL;
-+ Err("no arg\n");
-+ goto out;
-+ }
-+ LKTRTrace("%s, silent %d\n", arg, silent);
-+
-+ err = -ENOMEM;
-+ memset(&opts, 0, sizeof(opts));
-+ opts.opt = (void*)__get_free_page(GFP_KERNEL);
-+ //if (LktrCond) {free_page((unsigned long)opts.opt); opts.opt = NULL;}
-+ if (unlikely(!opts.opt))
-+ goto out;
-+ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt);
-+
-+ err = alloc_sbinfo(sb);
-+ //if (LktrCond) {si_write_unlock(sb);free_sbinfo(stosi(sb));err=-1;}
-+ if (unlikely(err))
-+ goto out_opts;
-+ SiMustWriteLock(sb);
-+ /* all timestamps always follow the ones on the branch */
-+ sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
-+ sb->s_op = &aufs_sop;
-+ au_init_export_op(sb);
-+ //err = kobj_mount(stosi(sb));
-+ //if (err)
-+ //goto out_info;
-+
-+ err = alloc_root(sb);
-+ //if (LktrCond) {rw_write_unlock(&dtodi(sb->s_root)->di_rwsem);
-+ //dput(sb->s_root);sb->s_root=NULL;err=-1;}
-+ if (unlikely(err)) {
-+ DEBUG_ON(sb->s_root);
-+ si_write_unlock(sb);
-+ goto out_info;
-+ }
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ inode = root->d_inode;
-+ inode->i_nlink = 2;
-+
-+ /*
-+ * actually we can parse options regardless aufs lock here.
-+ * but at remount time, parsing must be done before aufs lock.
-+ * so we follow the same rule.
-+ */
-+ ii_write_lock_parent(inode);
-+ aufs_write_unlock(root);
-+ err = au_parse_opts(sb, arg, &opts);
-+ //if (LktrCond) {au_free_opts(&opts); err = -1;}
-+ if (unlikely(err))
-+ goto out_root;
-+
-+ /* lock vfs_inode first, then aufs. */
-+ i_lock(inode);
-+ inode->i_op = &aufs_dir_iop;
-+ inode->i_fop = &aufs_dir_fop;
-+ aufs_write_lock(root);
-+
-+ sb->s_maxbytes = 0;
-+ err = au_do_opts_mount(sb, &opts);
-+ //if (LktrCond) err = -1;
-+ au_free_opts(&opts);
-+ if (unlikely(err))
-+ goto out_unlock;
-+ DEBUG_ON(!sb->s_maxbytes);
-+
-+ //DbgDentry(root);
-+ aufs_write_unlock(root);
-+ i_unlock(inode);
-+ //DbgSb(sb);
-+ goto out_opts; /* success */
-+
-+ out_unlock:
-+ aufs_write_unlock(root);
-+ i_unlock(inode);
-+ out_root:
-+ dput(root);
-+ sb->s_root = NULL;
-+ out_info:
-+ free_sbinfo(stosi(sb));
-+ sb->s_fs_info = NULL;
-+ out_opts:
-+ free_page((unsigned long)opts.opt);
-+ out:
-+ TraceErr(err);
-+ err = cvt_err(err);
-+ TraceErr(err);
-+ //au_debug_off();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+static int aufs_get_sb(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *raw_data,
-+ struct vfsmount *mnt)
-+{
-+ int err;
-+
-+ /* all timestamps always follow the ones on the branch */
-+ //mnt->mnt_flags |= MNT_NOATIME | MNT_NODIRATIME;
-+ err = get_sb_nodev(fs_type, flags, raw_data, aufs_fill_super, mnt);
-+ if (!err) {
-+ struct aufs_sbinfo *sbinfo = stosi(mnt->mnt_sb);
-+ sbinfo->si_mnt = mnt;
-+ sysaufs_add(sbinfo);
-+ }
-+ return err;
-+}
-+#else
-+static struct super_block *aufs_get_sb(struct file_system_type *fs_type,
-+ int flags, const char *dev_name,
-+ void *raw_data)
-+{
-+ return get_sb_nodev(fs_type, flags, raw_data, aufs_fill_super);
-+}
-+#endif
-+
-+struct file_system_type aufs_fs_type = {
-+ .name = AUFS_FSTYPE,
-+ .fs_flags = FS_REVAL_DOT, // for UDBA and NFS branch
-+ .get_sb = aufs_get_sb,
-+ .kill_sb = generic_shutdown_super,
-+ //no need to __module_get() and module_put().
-+ .owner = THIS_MODULE,
-+};
-diff --git a/fs/aufs/super.h b/fs/aufs/super.h
-new file mode 100755
-index 0000000..56ddee1
---- /dev/null
-+++ b/fs/aufs/super.h
-@@ -0,0 +1,339 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: super.h,v 1.44 2007/05/14 03:39:54 sfjro Exp $ */
-+
-+#ifndef __AUFS_SUPER_H__
-+#define __AUFS_SUPER_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+#include "sysaufs.h"
-+
-+#ifdef CONFIG_AUFS_SYSAUFS
-+/* entries under sysfs per mount-point */
-+enum {SysaufsSb_XINO, /* SysaufsSb_PLINK, */ SysaufsSb_Last};
-+struct sysaufs_sbinfo {
-+ au_subsys_t subsys;
-+ struct sysaufs_entry array[SysaufsSb_Last];
-+};
-+extern sysaufs_op au_si_ops[];
-+#else
-+struct sysaufs_sbinfo {};
-+#endif
-+
-+struct aufs_sbinfo {
-+ struct aufs_rwsem si_rwsem;
-+
-+ /* branch management */
-+ /* wrap around attack by superuser? No. */
-+ int si_generation;
-+
-+ /*
-+ * set true when refresh_dirs() at remount time failed.
-+ * then try refreshing dirs at access time again.
-+ * if it is false, refreshing dirs at access time is unnecesary
-+ */
-+ unsigned int si_failed_refresh_dirs:1;
-+
-+ aufs_bindex_t si_bend;
-+ aufs_bindex_t si_last_br_id;
-+ struct aufs_branch **si_branch;
-+
-+ /* mount flags */
-+ unsigned int si_flags;
-+
-+ /* external inode number table */
-+ atomic_long_t si_xino; // time bomb
-+ //struct file *si_xino_bmap;
-+
-+ /* readdir cache time, max, in HZ */
-+ unsigned long si_rdcache;
-+
-+ /*
-+ * If the number of whiteouts are larger than si_dirwh, leave all of
-+ * them after rename_whtmp to reduce the cost of rmdir(2).
-+ * future fsck.aufs or kernel thread will remove them later.
-+ * Otherwise, remove all whiteouts and the dir in rmdir(2).
-+ */
-+ unsigned int si_dirwh;
-+
-+ /* pseudo_link list */ // dirty
-+ spinlock_t si_plink_lock;
-+ struct list_head si_plink;
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+ /* super_blocks list is not exported */
-+ struct list_head si_list;
-+ struct vfsmount *si_mnt; /* no get/put */
-+#endif
-+
-+ /* sysfs */
-+ struct sysaufs_sbinfo si_sysaufs;
-+
-+#ifdef CONFIG_AUFS_HINOTIFY
-+ /* hinotify */
-+ //atomic_t si_hinotify;
-+ //wait_queue_head_t si_hinotify_wq;
-+#endif
-+
-+#ifdef CONFIG_AUFS_ROBR
-+ /* locked vma list for mmap() */ // very dirty
-+ spinlock_t si_lvma_lock;
-+ struct list_head si_lvma;
-+#endif
-+};
-+
-+/* an entry in a xino file */
-+struct xino {
-+ ino_t ino;
-+ //__u32 h_gen;
-+} __attribute__ ((packed));
-+
-+//#define AuXino_INVALID_HGEN (-1)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* Mount flags */
-+#define AuFlag_XINO 1
-+#define AuFlag_ZXINO (1 << 1)
-+#define AuFlag_PLINK (1 << 2)
-+#define AuFlag_UDBA_NONE (1 << 3)
-+#define AuFlag_UDBA_REVAL (1 << 4)
-+#define AuFlag_UDBA_INOTIFY (1 << 5)
-+#define AuFlag_WARN_PERM (1 << 6)
-+#define AuFlag_COO_NONE (1 << 7)
-+#define AuFlag_COO_LEAF (1 << 8)
-+#define AuFlag_COO_ALL (1 << 9)
-+#define AuFlag_ALWAYS_DIROPQ (1 << 10)
-+#define AuFlag_DLGT (1 << 11)
-+
-+#define AuMask_UDBA (AuFlag_UDBA_NONE | AuFlag_UDBA_REVAL \
-+ | AuFlag_UDBA_INOTIFY)
-+#define AuMask_COO (AuFlag_COO_NONE | AuFlag_COO_LEAF \
-+ | AuFlag_COO_ALL)
-+
-+#ifdef CONFIG_AUFS_COMPAT
-+#define AuDefFlag_DIROPQ AuFlag_ALWAYS_DIROPQ
-+#else
-+#define AuDefFlag_DIROPQ 0
-+#endif
-+
-+#define AuDefFlags_COMM (AuFlag_XINO | AuFlag_UDBA_REVAL | AuFlag_WARN_PERM \
-+ | AuFlag_COO_NONE | AuDefFlag_DIROPQ)
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
-+#define AuDefFlags (AuDefFlags_COMM | AuFlag_PLINK)
-+#else
-+#define AuDefFlags AuDefFlags_COMM
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* flags for aufs_read_lock()/di_read_lock() */
-+#define AUFS_D_WLOCK 1
-+#define AUFS_I_RLOCK 2
-+#define AUFS_I_WLOCK 4
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* super.c */
-+int au_show_brs(struct seq_file *seq, struct super_block *sb);
-+
-+/* xino.c */
-+struct file *xino_create(struct super_block *sb, char *fname, int silent,
-+ struct dentry *parent);
-+ino_t xino_new_ino(struct super_block *sb);
-+int xino_write0(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino);
-+int xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ struct xino *xino);
-+int xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ struct xino *xino);
-+int xino_init(struct super_block *sb, aufs_bindex_t bindex,
-+ struct file *base_file, int do_test);
-+struct opt_xino;
-+int xino_set(struct super_block *sb, struct opt_xino *xino, int remount);
-+int xino_clr(struct super_block *sb);
-+struct file *xino_def(struct super_block *sb);
-+
-+/* sbinfo.c */
-+struct aufs_sbinfo *stosi(struct super_block *sb);
-+aufs_bindex_t sbend(struct super_block *sb);
-+struct aufs_branch *stobr(struct super_block *sb, aufs_bindex_t bindex);
-+int au_sigen(struct super_block *sb);
-+int au_sigen_inc(struct super_block *sb);
-+int find_bindex(struct super_block *sb, struct aufs_branch *br);
-+
-+void aufs_read_lock(struct dentry *dentry, int flags);
-+void aufs_read_unlock(struct dentry *dentry, int flags);
-+void aufs_write_lock(struct dentry *dentry);
-+void aufs_write_unlock(struct dentry *dentry);
-+void aufs_read_and_write_lock2(struct dentry *d1, struct dentry *d2, int isdir);
-+void aufs_read_and_write_unlock2(struct dentry *d1, struct dentry *d2);
-+
-+aufs_bindex_t new_br_id(struct super_block *sb);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline const char *au_sbtype(struct super_block *sb)
-+{
-+ return sb->s_type->name;
-+}
-+
-+static inline int au_is_aufs(struct super_block *sb)
-+{
-+ return !strcmp(au_sbtype(sb), AUFS_FSTYPE);
-+}
-+
-+static inline int au_is_nfs(struct super_block *sb)
-+{
-+#if defined(CONFIG_NFS_FS) || defined(CONFIG_NFS_FS_MODULE)
-+ return !strcmp(au_sbtype(sb), "nfs");
-+#else
-+ return 0;
-+#endif
-+}
-+
-+static inline int au_is_remote(struct super_block *sb)
-+{
-+ return au_is_nfs(sb);
-+}
-+
-+#ifdef CONFIG_AUFS_EXPORT
-+static inline void au_init_export_op(struct super_block *sb)
-+{
-+ extern struct export_operations aufs_export_op;
-+ sb->s_export_op = &aufs_export_op;
-+}
-+
-+static inline int au_is_nfsd(struct task_struct *tsk)
-+{
-+ return (!tsk->mm && !strcmp(tsk->comm, "nfsd"));
-+}
-+
-+static inline void au_nfsd_lockdep_off(void)
-+{
-+ /* braces are added to stop a warning */
-+ if (au_is_nfsd(current)) {
-+ lockdep_off();
-+ }
-+}
-+
-+static inline void au_nfsd_lockdep_on(void)
-+{
-+ /* braces are added to stop a warning */
-+ if (au_is_nfsd(current)) {
-+ lockdep_on();
-+ }
-+}
-+#else
-+static inline int au_is_nfsd(struct task_struct *tsk)
-+{
-+ return 0;
-+}
-+static inline void au_init_export_op(struct super_block *sb)
-+{
-+ /* nothing */
-+}
-+#define au_nfsd_lockdep_off() /* */
-+#define au_nfsd_lockdep_on() /* */
-+#endif /* CONFIG_AUFS_EXPORT */
-+
-+static inline void init_lvma(struct aufs_sbinfo *sbinfo)
-+{
-+#ifdef CONFIG_AUFS_ROBR
-+ spin_lock_init(&sbinfo->si_lvma_lock);
-+ INIT_LIST_HEAD(&sbinfo->si_lvma);
-+#else
-+ /* nothing */
-+#endif
-+}
-+
-+/* limited support before 2.6.18 */
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+static inline void au_mntget(struct super_block *sb)
-+{
-+ mntget(stosi(sb)->si_mnt);
-+}
-+
-+static inline void au_mntput(struct super_block *sb)
-+{
-+ mntput(stosi(sb)->si_mnt);
-+}
-+#else
-+static inline void au_mntget(struct super_block *sb)
-+{
-+ /* empty */
-+}
-+
-+static inline void au_mntput(struct super_block *sb)
-+{
-+ /* empty */
-+}
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline void au_flag_set(struct super_block *sb, unsigned int flag)
-+{
-+ //SiMustWriteLock(sb);
-+ stosi(sb)->si_flags |= flag;
-+}
-+
-+static inline void au_flag_clr(struct super_block *sb, unsigned int flag)
-+{
-+ //SiMustWriteLock(sb);
-+ stosi(sb)->si_flags &= ~flag;
-+}
-+
-+static inline
-+unsigned int au_flag_test(struct super_block *sb, unsigned int flag)
-+{
-+ //SiMustAnyLock(sb);
-+ return stosi(sb)->si_flags & flag;
-+}
-+
-+static inline unsigned int au_flag_test_udba(struct super_block *sb)
-+{
-+ return au_flag_test(sb, AuMask_UDBA);
-+}
-+
-+static inline unsigned int au_flag_test_coo(struct super_block *sb)
-+{
-+ return au_flag_test(sb, AuMask_COO);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* lock superblock. mainly for entry point functions */
-+/*
-+ * si_read_lock, si_write_lock,
-+ * si_read_unlock, si_write_unlock, si_downgrade_lock
-+ */
-+SimpleRwsemFuncs(si, struct super_block *sb, stosi(sb)->si_rwsem);
-+
-+/* to debug easier, do not make them inlined functions */
-+#define SiMustReadLock(sb) RwMustReadLock(&stosi(sb)->si_rwsem)
-+#define SiMustWriteLock(sb) RwMustWriteLock(&stosi(sb)->si_rwsem)
-+#define SiMustAnyLock(sb) RwMustAnyLock(&stosi(sb)->si_rwsem)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_SUPER_H__ */
-diff --git a/fs/aufs/sysaufs.c b/fs/aufs/sysaufs.c
-new file mode 100755
-index 0000000..d686862
---- /dev/null
-+++ b/fs/aufs/sysaufs.c
-@@ -0,0 +1,620 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: sysaufs.c,v 1.6 2007/05/14 03:40:10 sfjro Exp $ */
-+
-+#include <linux/module.h>
-+#include <linux/seq_file.h>
-+#include <linux/sysfs.h>
-+#include "aufs.h"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* super_blocks list is not exported */
-+static DEFINE_MUTEX(aufs_sbilist_mtx);
-+static LIST_HEAD(aufs_sbilist);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+typedef ssize_t (*rwfunc_t)(struct kobject *kobj, char *buf, loff_t offset,
-+ size_t sz, struct sysaufs_args *args);
-+static ssize_t sysaufs_read(struct kobject *kobj, char *buf, loff_t offset,
-+ size_t sz, struct sysaufs_args *args);
-+static ssize_t sysaufs_free_write(struct kobject *kobj, char *buf, loff_t
-+ offset, size_t sz, struct sysaufs_args *args);
-+
-+#define GFunc(name, _index, func) \
-+static ssize_t name(struct kobject *kobj, char *buf, loff_t offset, size_t sz) \
-+{ \
-+ struct sysaufs_args args = { \
-+ .index = (_index), \
-+ .mtx = &aufs_sbilist_mtx, \
-+ .sb = NULL \
-+ }; \
-+ return func(kobj, buf, offset, sz, &args); \
-+}
-+
-+#define GFuncs(name, _index) \
-+ GFunc(read_##name, _index, sysaufs_read); \
-+ GFunc(write_##name, _index, sysaufs_free_write);
-+
-+static struct super_block *find_sb_locked(struct kobject *kobj)
-+{
-+ struct super_block *sb;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+ MtxMustLock(&aufs_sbilist_mtx);
-+
-+ sb = NULL;
-+ list_for_each_entry(sbinfo, &aufs_sbilist, si_list) {
-+ if (&au_subsys_to_kset(sbinfo->si_sysaufs.subsys).kobj != kobj)
-+ continue;
-+ sb = sbinfo->si_mnt->mnt_sb;
-+ si_read_lock(sb);
-+ break;
-+ }
-+ return sb;
-+}
-+
-+static ssize_t sb_func(struct kobject *kobj, char *buf, loff_t offset,
-+ size_t sz, struct sysaufs_args *args, rwfunc_t func)
-+{
-+ ssize_t err;
-+
-+ err = -ENOENT;
-+ mutex_lock(&aufs_sbilist_mtx);
-+ args->sb = find_sb_locked(kobj);
-+ if (args->sb) {
-+ err = func(kobj, buf, offset, sz, args);
-+ si_read_unlock(args->sb);
-+ }
-+ mutex_unlock(&aufs_sbilist_mtx);
-+ return err;
-+}
-+
-+#define SbFunc(name, _index, func) \
-+static ssize_t name(struct kobject *kobj, char *buf, loff_t offset, size_t sz) \
-+{ \
-+ struct sysaufs_args args = { \
-+ .index = (_index), \
-+ .mtx = NULL \
-+ }; \
-+ return sb_func(kobj, buf, offset, sz, &args, func); \
-+}
-+
-+#define SbFuncs(name, index) \
-+ SbFunc(read_##name, index, sysaufs_read); \
-+ SbFunc(write_##name, index, sysaufs_free_write)
-+
-+static decl_subsys(aufs, NULL, NULL);
-+enum {Brs, Stat, Config, _Last};
-+static struct sysaufs_entry g_array[_Last];
-+GFuncs(brs, Brs);
-+GFuncs(stat, Stat);
-+GFuncs(config, Config);
-+
-+SbFuncs(xino, SysaufsSb_XINO);
-+
-+#define SetEntry(e, _name, init_size, _ops) \
-+ do { \
-+ (e)->attr.attr.name = #_name; \
-+ (e)->attr.attr.owner = THIS_MODULE; \
-+ (e)->attr.attr.mode = S_IRUGO | S_IWUSR; \
-+ (e)->attr.read = read_##_name; \
-+ (e)->attr.write = write_##_name; \
-+ (e)->allocated = init_size; \
-+ (e)->err = -1; \
-+ (e)->ops = _ops; \
-+ } while (0)
-+
-+#define Priv(e) (e)->attr.private
-+#define Allocated(e) (e)->allocated
-+#define Len(e) (e)->attr.size
-+#define Name(e) attr_name((e)->attr)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void free_entry(struct sysaufs_entry *e)
-+{
-+ MtxMustLock(&aufs_sbilist_mtx);
-+ DEBUG_ON(!Priv(e));
-+
-+ if (Allocated(e) > 0)
-+ kfree(Priv(e));
-+ else
-+ free_pages((unsigned long)Priv(e), -Allocated(e));
-+ Priv(e) = NULL;
-+ Len(e) = 0;
-+}
-+
-+static void free_entries(void)
-+{
-+ static int a[] = {Brs, -1};
-+ int *p = a;
-+
-+ MtxMustLock(&aufs_sbilist_mtx);
-+
-+ while (*p >= 0) {
-+ if (Priv(g_array + *p))
-+ free_entry(g_array + *p);
-+ p++;
-+ }
-+}
-+
-+static int alloc_entry(struct sysaufs_entry *e)
-+{
-+ MtxMustLock(&aufs_sbilist_mtx);
-+ DEBUG_ON(Priv(e));
-+ //Dbg("%d\n", Allocated(e));
-+
-+ if (Allocated(e) > 0)
-+ Priv(e) = kmalloc(Allocated(e), GFP_KERNEL);
-+ else
-+ Priv(e) = (void*)__get_free_pages(GFP_KERNEL, -Allocated(e));
-+ if (Priv(e))
-+ return 0;
-+ return -ENOMEM;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void unreg(au_subsys_t *subsys, struct sysaufs_entry *a, int n,
-+ au_subsys_t *parent)
-+{
-+ int i;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < n; i++, a++)
-+ if (!a->err) {
-+ sysfs_remove_bin_file
-+ (&au_subsys_to_kset(*subsys).kobj, &a->attr);
-+ if (Priv(a))
-+ free_entry(a);
-+ }
-+
-+ subsystem_unregister(subsys);
-+ subsys_put(parent);
-+}
-+
-+static int reg(au_subsys_t *subsys, struct sysaufs_entry *a, int n,
-+ au_subsys_t *parent)
-+{
-+ int err, i;
-+
-+ TraceEnter();
-+
-+ subsys_get(parent);
-+ kobj_set_kset_s(&au_subsys_to_kset(*subsys), *parent);
-+ err = subsystem_register(subsys);
-+ if (unlikely(err))
-+ goto out;
-+
-+ for (i = 0; !err && i < n; i++)
-+ err = a[i].err = sysfs_create_bin_file
-+ (&au_subsys_to_kset(*subsys).kobj, &a[i].attr);
-+ if (unlikely(err))
-+ unreg(subsys, a, n, parent);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define SbSetEntry(index, name, init_size) \
-+ SetEntry(sa->array + index, name, init_size, au_si_ops);
-+
-+void sysaufs_add(struct aufs_sbinfo *sbinfo)
-+{
-+ int err;
-+ struct sysaufs_sbinfo *sa = &sbinfo->si_sysaufs;
-+
-+ TraceEnter();
-+
-+ mutex_lock(&aufs_sbilist_mtx);
-+ list_add_tail(&sbinfo->si_list, &aufs_sbilist);
-+ free_entries();
-+
-+ memset(sa, 0, sizeof(*sa));
-+ SbSetEntry(SysaufsSb_XINO, xino, 128);
-+ err = kobject_set_name(&au_subsys_to_kset(sa->subsys).kobj, "%p",
-+ sbinfo->si_mnt->mnt_sb);
-+ if (!err)
-+ err = reg(&sa->subsys, sa->array, ARRAY_SIZE(sa->array),
-+ &aufs_subsys);
-+ if (unlikely(err))
-+ Warn("failed adding sysfs (%d)\n", err);
-+
-+ mutex_unlock(&aufs_sbilist_mtx);
-+}
-+
-+void sysaufs_del(struct aufs_sbinfo *sbinfo)
-+{
-+ struct sysaufs_sbinfo *sa = &sbinfo->si_sysaufs;
-+
-+ TraceEnter();
-+
-+ mutex_lock(&aufs_sbilist_mtx);
-+ unreg(&sa->subsys, sa->array, ARRAY_SIZE(sa->array), &aufs_subsys);
-+ list_del(&sbinfo->si_list);
-+ free_entries();
-+ mutex_unlock(&aufs_sbilist_mtx);
-+}
-+
-+void sysaufs_notify_remount(void)
-+{
-+ mutex_lock(&aufs_sbilist_mtx);
-+ free_entries();
-+ mutex_unlock(&aufs_sbilist_mtx);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int make_brs(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size)
-+{
-+ int err;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+ MtxMustLock(&aufs_sbilist_mtx);
-+ DEBUG_ON(args->index != Brs);
-+
-+ err = 0;
-+ list_for_each_entry(sbinfo, &aufs_sbilist, si_list) {
-+ struct super_block *sb;
-+ struct dentry *root;
-+ struct vfsmount *mnt;
-+
-+ sb = sbinfo->si_mnt->mnt_sb;
-+ root = sb->s_root;
-+ aufs_read_lock(root, !AUFS_I_RLOCK);
-+ mnt = sbinfo->si_mnt;
-+ err = seq_escape
-+ (seq, mnt->mnt_devname ? mnt->mnt_devname : "none",
-+ au_esc_chars);
-+ if (!err)
-+ err = seq_putc(seq, ' ');
-+ if (!err)
-+ err = seq_path(seq, mnt, root, au_esc_chars);
-+ if (err > 0)
-+ err = seq_printf(seq, " %p br:", sb);
-+ if (!err)
-+ err = au_show_brs(seq, sb);
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ if (!err)
-+ err = seq_putc(seq, '\n');
-+ else
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int make_config(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size)
-+{
-+ int err;
-+
-+ TraceEnter();
-+ DEBUG_ON(args->index != Config);
-+
-+#ifdef CONFIG_AUFS
-+ err = seq_puts(seq, "CONFIG_AUFS=y\n");
-+#else
-+ err = seq_puts(seq, "CONFIG_AUFS=m\n");
-+#endif
-+
-+#define puts(m, v) \
-+ if (!err) err = seq_puts(seq, "CONFIG_AUFS_" #m "=" #v "\n")
-+#define puts_bool(m) puts(m, y)
-+#define puts_mod(m) puts(m, m)
-+
-+#ifdef CONFIG_AUFS_FAKE_DM
-+ puts_bool(FAKE_DM);
-+#endif
-+#ifdef CONFIG_AUFS_BRANCH_MAX_127
-+ puts_bool(BRANCH_MAX_127);
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_511)
-+ puts_bool(BRANCH_MAX_511);
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_1023)
-+ puts_bool(BRANCH_MAX_1023);
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_32767)
-+ puts_bool(BRANCH_MAX_32767);
-+#endif
-+ puts_bool(SYSAUFS);
-+#ifdef CONFIG_AUFS_HINOTIFY
-+ puts_bool(HINOTIFY);
-+#endif
-+#ifdef CONFIG_AUFS_EXPORT
-+ puts_bool(EXPORT);
-+#endif
-+#ifdef CONFIG_AUFS_ROBR
-+ puts_bool(ROBR);
-+#endif
-+#ifdef CONFIG_AUFS_DLGT
-+ puts_bool(DLGT);
-+#endif
-+#ifdef CONFIG_AUFS_LHASH_PATCH
-+ puts_bool(LHASH_PATCH);
-+#endif
-+#ifdef CONFIG_AUFS_KSIZE_PATCH
-+ puts_bool(KSIZE_PATCH);
-+#endif
-+#ifdef CONFIG_AUFS_DEBUG
-+ puts_bool(DEBUG);
-+#endif
-+#ifdef CONFIG_AUFS_COMPAT
-+ puts_bool(COMPAT);
-+#endif
-+
-+#undef puts_bool
-+#undef puts
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int make_stat(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size)
-+{
-+ int err, i;
-+
-+ TraceEnter();
-+ DEBUG_ON(args->index != Stat);
-+
-+ *do_size = 0;
-+ err = seq_puts(seq, "wkq max_busy:");
-+ for (i = 0; !err && i < aufs_nwkq; i++)
-+ err = seq_printf(seq, " %u", au_wkq[i].max_busy);
-+ if (!err)
-+ err = seq_printf(seq, ", %u(generic)\n",
-+ au_wkq[aufs_nwkq].max_busy);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int make(struct sysaufs_entry *e, struct sysaufs_args *args,
-+ int *do_size)
-+
-+{
-+ int err;
-+ struct seq_file *seq;
-+
-+ TraceEnter();
-+ DEBUG_ON(Priv(e));
-+ MtxMustLock(&aufs_sbilist_mtx);
-+
-+ err = -ENOMEM;
-+ seq = kzalloc(sizeof(*seq), GFP_KERNEL);
-+ if (unlikely(!seq))
-+ goto out;
-+
-+ Len(e) = 0;
-+ while (1) {
-+ err = alloc_entry(e);
-+ if (unlikely(err))
-+ break;
-+
-+ //mutex_init(&seq.lock);
-+ seq->buf = Priv(e);
-+ seq->count = 0;
-+ seq->size = Allocated(e);
-+ if (unlikely(Allocated(e) <= 0))
-+ seq->size = PAGE_SIZE << -Allocated(e);
-+
-+ err = e->ops[args->index](seq, args, do_size);
-+ if (!err) {
-+ Len(e) = seq->count;
-+ break; /* success */
-+ }
-+
-+ free_entry(e);
-+ if (Allocated(e) > 0) {
-+ Allocated(e) <<= 1;
-+ if (unlikely(Allocated(e) >= (int)PAGE_SIZE))
-+ Allocated(e) = 0;
-+ } else
-+ Allocated(e)--;
-+ //Dbg("%d\n", Allocated(e));
-+ }
-+ kfree(seq);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* why does sysfs pass my parent kobject? */
-+static struct dentry *find_me(struct dentry *parent, struct sysaufs_entry *e)
-+{
-+#if 1
-+ struct dentry *dentry;
-+ const char *name = Name(e);
-+ const unsigned int len = strlen(name);
-+
-+ //Dbg("%.*s\n", DLNPair(parent));
-+ spin_lock(&dcache_lock);
-+ list_for_each_entry(dentry, &parent->d_subdirs, D_CHILD) {
-+ //Dbg("%.*s\n", DLNPair(dentry));
-+ if (len == dentry->d_name.len
-+ && !strcmp(dentry->d_name.name, name)) {
-+ spin_unlock(&dcache_lock);
-+ return dentry;
-+ }
-+ }
-+ spin_unlock(&dcache_lock);
-+#endif
-+ return NULL;
-+}
-+
-+static ssize_t sysaufs_read(struct kobject *kobj, char *buf, loff_t offset,
-+ size_t sz, struct sysaufs_args *args)
-+{
-+ ssize_t err;
-+ loff_t len;
-+ struct dentry *d;
-+ struct sysaufs_entry *e;
-+ int do_size;
-+
-+ LKTRTrace("{%d, %p}, offset %Ld, sz %lu\n",
-+ args->index, args->sb, offset, (unsigned long)sz);
-+
-+ if (unlikely(!sz))
-+ return 0;
-+
-+ err = 0;
-+ d = NULL;
-+ e = g_array + args->index;
-+ if (args->sb)
-+ e = stosi(args->sb)->si_sysaufs.array + args->index;
-+
-+ do_size = 1;
-+ if (args->mtx)
-+ mutex_lock(args->mtx);
-+ if (unlikely(!Priv(e))) {
-+ err = make(e, args, &do_size);
-+ DEBUG_ON(Len(e) > INT_MAX);
-+ if (do_size) {
-+ d = find_me(kobj->dentry, e);
-+ if (d)
-+ i_size_write(d->d_inode, Len(e));
-+ }
-+ }
-+
-+ if (!err) {
-+ err = len = Len(e) - offset;
-+ LKTRTrace("%Ld\n", len);
-+ if (len > 0) {
-+ if (len > sz)
-+ err = sz;
-+ memcpy(buf, Priv(e) + offset, err);
-+ }
-+
-+ if (!do_size)
-+ free_entry(e);
-+ }
-+ if (args->mtx)
-+ mutex_unlock(args->mtx);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static ssize_t sysaufs_free_write(struct kobject *kobj, char *buf,
-+ loff_t offset, size_t sz,
-+ struct sysaufs_args *args)
-+{
-+ struct dentry *d;
-+ int allocated, len;
-+ struct sysaufs_entry *e;
-+
-+ LKTRTrace("{%d, %p}\n", args->index, args->sb);
-+
-+ e = g_array + args->index;
-+ if (args->sb)
-+ e = stosi(args->sb)->si_sysaufs.array + args->index;
-+
-+ if (args->mtx)
-+ mutex_lock(args->mtx);
-+ if (Priv(e)) {
-+ allocated = Allocated(e);
-+ if (unlikely(allocated <= 0))
-+ allocated = PAGE_SIZE << -allocated;
-+ allocated >>= 1;
-+ len = Len(e);
-+
-+ free_entry(e);
-+ if (unlikely(len <= allocated)) {
-+ if (Allocated(e) >= 0)
-+ Allocated(e) = allocated;
-+ else
-+ Allocated(e)++;
-+ }
-+
-+ d = find_me(kobj->dentry, e);
-+ if (d && i_size_read(d->d_inode))
-+ i_size_write(d->d_inode, 0);
-+ }
-+ if (args->mtx)
-+ mutex_unlock(args->mtx);
-+
-+ return sz;
-+}
-+
-+static sysaufs_op g_ops[] = {
-+ [Brs] = make_brs,
-+ [Stat] = make_stat,
-+ [Config] = make_config
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define GSetEntry(index, name, init_size) \
-+ SetEntry(g_array + index, name, init_size, g_ops)
-+
-+int __init sysaufs_init(void)
-+{
-+ int err;
-+
-+ GSetEntry(Brs, brs, 128);
-+ GSetEntry(Stat, stat, 32);
-+ GSetEntry(Config, config, 256);
-+ err = reg(&aufs_subsys, g_array, ARRAY_SIZE(g_array), &fs_subsys);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+void __exit sysaufs_fin(void)
-+{
-+ mutex_lock(&aufs_sbilist_mtx);
-+ unreg(&aufs_subsys, g_array, ARRAY_SIZE(g_array), &fs_subsys);
-+ mutex_unlock(&aufs_sbilist_mtx);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef DbgDlgt
-+int is_branch(struct super_block *h_sb)
-+{
-+ int found = 0;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ //Dbg("here\n");
-+ mutex_lock(&aufs_sbilist_mtx);
-+ list_for_each_entry(sbinfo, &aufs_sbilist, si_list) {
-+ aufs_bindex_t bindex, bend;
-+ struct super_block *sb;
-+
-+ sb = sbinfo->si_mnt->mnt_sb;
-+ si_read_lock(sb);
-+ bend = sbend(sb);
-+ for (bindex = 0; !found && bindex <= bend; bindex++)
-+ found = (h_sb == sbr_sb(sb, bindex));
-+ si_read_unlock(sb);
-+ }
-+ mutex_unlock(&aufs_sbilist_mtx);
-+ return found;
-+}
-+#endif
-diff --git a/fs/aufs/sysaufs.h b/fs/aufs/sysaufs.h
-new file mode 100755
-index 0000000..cf0247f
---- /dev/null
-+++ b/fs/aufs/sysaufs.h
-@@ -0,0 +1,83 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: sysaufs.h,v 1.3 2007/05/14 06:27:18 sfjro Exp $ */
-+
-+#ifndef __SYSAUFS_H__
-+#define __SYSAUFS_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/seq_file.h>
-+#include <linux/sysfs.h>
-+#include <linux/version.h>
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-+typedef struct kset au_subsys_t;
-+#define au_subsys_to_kset(subsys) (subsys)
-+#else
-+typedef struct subsystem au_subsys_t;
-+#define au_subsys_to_kset(subsys) ((subsys).kset)
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* arguments for an entry under sysfs */
-+struct sysaufs_args {
-+ int index;
-+ struct mutex *mtx;
-+ struct super_block *sb;
-+};
-+
-+typedef int (*sysaufs_op)(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size);
-+
-+/* an entry under sysfs */
-+struct sysaufs_entry {
-+ struct bin_attribute attr;
-+ int allocated; /* zero minus means pages */
-+ int err;
-+ sysaufs_op *ops;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_sbinfo;
-+#ifdef CONFIG_AUFS_SYSAUFS
-+void sysaufs_add(struct aufs_sbinfo *sbinfo);
-+void sysaufs_del(struct aufs_sbinfo *sbinfo);
-+int __init sysaufs_init(void);
-+void sysaufs_fin(void);
-+void sysaufs_notify_remount(void);
-+#else
-+static inline void sysaufs_add(struct aufs_sbinfo *sbinfo)
-+{
-+ /* nothing */
-+}
-+
-+static inline void sysaufs_del(struct aufs_sbinfo *sbinfo)
-+{
-+ /* nothing */
-+}
-+#define sysaufs_init() 0
-+#define sysaufs_fin() /* */
-+#define sysaufs_notify_remount() /* */
-+#endif /* CONFIG_AUFS_SYSAUFS */
-+
-+#endif /* __KERNEL__ */
-+#endif /* __SYSAUFS_H__ */
-diff --git a/fs/aufs/vdir.c b/fs/aufs/vdir.c
-new file mode 100755
-index 0000000..8e99b7d
---- /dev/null
-+++ b/fs/aufs/vdir.c
-@@ -0,0 +1,802 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: vdir.c,v 1.22 2007/05/14 03:38:52 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+static int calc_size(int namelen)
-+{
-+ int sz;
-+
-+ sz = sizeof(struct aufs_de) + namelen;
-+ if (sizeof(ino_t) == sizeof(long)) {
-+ const int mask = sizeof(ino_t) - 1;
-+ if (sz & mask) {
-+ sz += sizeof(ino_t);
-+ sz &= ~mask;
-+ }
-+ } else {
-+#if 0 // remove
-+ BUG();
-+ // this block will be discarded by optimizer.
-+ int m;
-+ m = sz % sizeof(ino_t);
-+ if (m)
-+ sz += sizeof(ino_t) - m;
-+#endif
-+ }
-+
-+ DEBUG_ON(sz % sizeof(ino_t));
-+ return sz;
-+}
-+
-+static int set_deblk_end(union aufs_deblk_p *p, union aufs_deblk_p *deblk_end)
-+{
-+ if (calc_size(0) <= deblk_end->p - p->p) {
-+ p->de->de_str.len = 0;
-+ //smp_mb();
-+ return 0;
-+ }
-+ return -1; // error
-+}
-+
-+/* returns true or false */
-+static int is_deblk_end(union aufs_deblk_p *p, union aufs_deblk_p *deblk_end)
-+{
-+ if (calc_size(0) <= deblk_end->p - p->p)
-+ return !p->de->de_str.len;
-+ return 1;
-+}
-+
-+static aufs_deblk_t *last_deblk(struct aufs_vdir *vdir)
-+{
-+ return vdir->vd_deblk[vdir->vd_nblk - 1];
-+}
-+
-+void nhash_init(struct aufs_nhash *nhash)
-+{
-+ int i;
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++)
-+ INIT_HLIST_HEAD(nhash->heads + i);
-+}
-+
-+struct aufs_nhash *nhash_new(gfp_t gfp)
-+{
-+ struct aufs_nhash *nhash;
-+
-+ nhash = kmalloc(sizeof(*nhash), gfp);
-+ if (nhash) {
-+ nhash_init(nhash);
-+ return nhash;
-+ }
-+ return ERR_PTR(-ENOMEM);
-+}
-+
-+void nhash_del(struct aufs_nhash *nhash)
-+{
-+ nhash_fin(nhash);
-+ kfree(nhash);
-+}
-+
-+void nhash_move(struct aufs_nhash *dst, struct aufs_nhash *src)
-+{
-+ int i;
-+
-+ TraceEnter();
-+
-+ //DbgWhlist(src);
-+ *dst = *src;
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ struct hlist_head *h;
-+ h = dst->heads + i;
-+ if (h->first)
-+ h->first->pprev = &h->first;
-+ INIT_HLIST_HEAD(src->heads + i);
-+ }
-+ //DbgWhlist(src);
-+ //DbgWhlist(dst);
-+ //smp_mb();
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void nhash_fin(struct aufs_nhash *whlist)
-+{
-+ int i;
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos, *n;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ head = whlist->heads + i;
-+ hlist_for_each_entry_safe(tpos, pos, n, head, wh_hash) {
-+ //hlist_del(pos);
-+ kfree(tpos);
-+ }
-+ }
-+}
-+
-+int is_longer_wh(struct aufs_nhash *whlist, aufs_bindex_t btgt, int limit)
-+{
-+ int n, i;
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos;
-+
-+ LKTRTrace("limit %d\n", limit);
-+ //return 1;
-+
-+ n = 0;
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ head = whlist->heads + i;
-+ hlist_for_each_entry(tpos, pos, head, wh_hash)
-+ if (tpos->wh_bindex == btgt && ++n > limit)
-+ return 1;
-+ }
-+ return 0;
-+}
-+
-+/* returns found(true) or not */
-+int test_known_wh(struct aufs_nhash *whlist, char *name, int namelen)
-+{
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos;
-+ struct aufs_destr *str;
-+
-+ LKTRTrace("%.*s\n", namelen, name);
-+
-+ head = whlist->heads + au_name_hash(name, namelen);
-+ hlist_for_each_entry(tpos, pos, head, wh_hash) {
-+ str = &tpos->wh_str;
-+ LKTRTrace("%.*s\n", str->len, str->name);
-+ if (str->len == namelen && !memcmp(str->name, name, namelen))
-+ return 1;
-+ }
-+ return 0;
-+}
-+
-+int append_wh(struct aufs_nhash *whlist, char *name, int namelen,
-+ aufs_bindex_t bindex)
-+{
-+ int err;
-+ struct aufs_destr *str;
-+ struct aufs_wh *wh;
-+
-+ LKTRTrace("%.*s\n", namelen, name);
-+
-+ err = -ENOMEM;
-+ wh = kmalloc(sizeof(*wh) + namelen, GFP_KERNEL);
-+ if (unlikely(!wh))
-+ goto out;
-+ err = 0;
-+ wh->wh_bindex = bindex;
-+ str = &wh->wh_str;
-+ str->len = namelen;
-+ memcpy(str->name, name, namelen);
-+ hlist_add_head(&wh->wh_hash,
-+ whlist->heads + au_name_hash(name, namelen));
-+ //smp_mb();
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void free_vdir(struct aufs_vdir *vdir)
-+{
-+ aufs_deblk_t **deblk;
-+
-+ TraceEnter();
-+
-+ deblk = vdir->vd_deblk;
-+ while (vdir->vd_nblk--) {
-+ kfree(*deblk);
-+ deblk++;
-+ }
-+ kfree(vdir->vd_deblk);
-+ cache_free_vdir(vdir);
-+}
-+
-+static int append_deblk(struct aufs_vdir *vdir)
-+{
-+ int err, sz, i;
-+ aufs_deblk_t **o;
-+ union aufs_deblk_p p, deblk_end;
-+
-+ TraceEnter();
-+
-+ err = -ENOMEM;
-+ sz = sizeof(*o) * vdir->vd_nblk;
-+ o = au_kzrealloc(vdir->vd_deblk, sz, sz + sizeof(*o), GFP_KERNEL);
-+ if (unlikely(!o))
-+ goto out;
-+ vdir->vd_deblk = o;
-+ p.deblk = kmalloc(sizeof(*p.deblk), GFP_KERNEL);
-+ if (p.deblk) {
-+ i = vdir->vd_nblk++;
-+ vdir->vd_deblk[i] = p.deblk;
-+ vdir->vd_last.i = i;
-+ vdir->vd_last.p.p = p.p;
-+ deblk_end.deblk = p.deblk + 1;
-+ err = set_deblk_end(&p, &deblk_end);
-+ DEBUG_ON(err);
-+ }
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static struct aufs_vdir *alloc_vdir(void)
-+{
-+ struct aufs_vdir *vdir;
-+ int err;
-+
-+ TraceEnter();
-+
-+ err = -ENOMEM;
-+ vdir = cache_alloc_vdir();
-+ if (unlikely(!vdir))
-+ goto out;
-+ vdir->vd_deblk = kzalloc(sizeof(*vdir->vd_deblk), GFP_KERNEL);
-+ if (unlikely(!vdir->vd_deblk))
-+ goto out_free;
-+
-+ vdir->vd_nblk = 0;
-+ vdir->vd_version = 0;
-+ vdir->vd_jiffy = 0;
-+ err = append_deblk(vdir);
-+ if (!err)
-+ return vdir; /* success */
-+
-+ kfree(vdir->vd_deblk);
-+
-+ out_free:
-+ cache_free_vdir(vdir);
-+ out:
-+ vdir = ERR_PTR(err);
-+ TraceErrPtr(vdir);
-+ return vdir;
-+}
-+
-+static int reinit_vdir(struct aufs_vdir *vdir)
-+{
-+ int err;
-+ union aufs_deblk_p p, deblk_end;
-+
-+ TraceEnter();
-+
-+ while (vdir->vd_nblk > 1) {
-+ kfree(vdir->vd_deblk[vdir->vd_nblk - 1]);
-+ vdir->vd_deblk[vdir->vd_nblk - 1] = NULL;
-+ vdir->vd_nblk--;
-+ }
-+ p.deblk = vdir->vd_deblk[0];
-+ deblk_end.deblk = p.deblk + 1;
-+ err = set_deblk_end(&p, &deblk_end);
-+ DEBUG_ON(err);
-+ vdir->vd_version = 0;
-+ vdir->vd_jiffy = 0;
-+ vdir->vd_last.i = 0;
-+ vdir->vd_last.p.deblk = vdir->vd_deblk[0];
-+ //smp_mb();
-+ //DbgVdir(vdir);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void free_dehlist(struct aufs_nhash *dehlist)
-+{
-+ int i;
-+ struct hlist_head *head;
-+ struct aufs_dehstr *tpos;
-+ struct hlist_node *pos, *n;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ head = dehlist->heads + i;
-+ hlist_for_each_entry_safe(tpos, pos, n, head, hash) {
-+ //hlist_del(pos);
-+ cache_free_dehstr(tpos);
-+ }
-+ }
-+}
-+
-+/* returns found(true) or not */
-+static int test_known(struct aufs_nhash *delist, char *name, int namelen)
-+{
-+ struct hlist_head *head;
-+ struct aufs_dehstr *tpos;
-+ struct hlist_node *pos;
-+ struct aufs_destr *str;
-+
-+ LKTRTrace("%.*s\n", namelen, name);
-+
-+ head = delist->heads + au_name_hash(name, namelen);
-+ hlist_for_each_entry(tpos, pos, head, hash) {
-+ str = tpos->str;
-+ LKTRTrace("%.*s\n", str->len, str->name);
-+ if (str->len == namelen && !memcmp(str->name, name, namelen))
-+ return 1;
-+ }
-+ return 0;
-+
-+}
-+
-+static int append_de(struct aufs_vdir *vdir, char *name, int namelen, ino_t ino,
-+ unsigned int d_type, struct aufs_nhash *delist)
-+{
-+ int err, sz;
-+ union aufs_deblk_p p, *room, deblk_end;
-+ struct aufs_dehstr *dehstr;
-+
-+ LKTRTrace("%.*s %d, i%lu, dt%u\n", namelen, name, namelen, ino, d_type);
-+
-+ p.deblk = last_deblk(vdir);
-+ deblk_end.deblk = p.deblk + 1;
-+ room = &vdir->vd_last.p;
-+ DEBUG_ON(room->p < p.p || deblk_end.p <= room->p
-+ || !is_deblk_end(room, &deblk_end));
-+
-+ sz = calc_size(namelen);
-+ if (unlikely(sz > deblk_end.p - room->p)) {
-+ err = append_deblk(vdir);
-+ if (unlikely(err))
-+ goto out;
-+ p.deblk = last_deblk(vdir);
-+ deblk_end.deblk = p.deblk + 1;
-+ //smp_mb();
-+ DEBUG_ON(room->p != p.p);
-+ }
-+
-+ err = -ENOMEM;
-+ dehstr = cache_alloc_dehstr();
-+ if (unlikely(!dehstr))
-+ goto out;
-+ dehstr->str = &room->de->de_str;
-+ hlist_add_head(&dehstr->hash,
-+ delist->heads + au_name_hash(name, namelen));
-+
-+ room->de->de_ino = ino;
-+ room->de->de_type = d_type;
-+ room->de->de_str.len = namelen;
-+ memcpy(room->de->de_str.name, name, namelen);
-+
-+ err = 0;
-+ room->p += sz;
-+ if (unlikely(set_deblk_end(room, &deblk_end)))
-+ err = append_deblk(vdir);
-+ //smp_mb();
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct fillvdir_arg {
-+ struct file *file;
-+ struct aufs_vdir *vdir;
-+ struct aufs_nhash *delist;
-+ struct aufs_nhash *whlist;
-+ aufs_bindex_t bindex;
-+ int err;
-+ int called;
-+};
-+
-+static int fillvdir(void *__arg, const char *__name, int namelen, loff_t offset,
-+ filldir_ino_t h_ino, unsigned int d_type)
-+{
-+ struct fillvdir_arg *arg = __arg;
-+ char *name = (void*)__name;
-+ aufs_bindex_t bindex, bend;
-+ struct xino xino;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, namelen %d, i%Lu, dt%u\n",
-+ namelen, name, namelen, (u64)h_ino, d_type);
-+
-+ sb = arg->file->f_dentry->d_sb;
-+ bend = arg->bindex;
-+ arg->err = 0;
-+ arg->called++;
-+ //smp_mb();
-+ if (namelen <= AUFS_WH_PFX_LEN
-+ || memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) {
-+ for (bindex = 0; bindex < bend; bindex++)
-+ if (test_known(arg->delist + bindex, name, namelen)
-+ || test_known_wh(arg->whlist + bindex, name,
-+ namelen))
-+ goto out; /* already exists or whiteouted */
-+
-+ arg->err = xino_read(sb, bend, h_ino, &xino);
-+ if (!arg->err && !xino.ino) {
-+ //struct inode *h_inode;
-+ xino.ino = xino_new_ino(sb);
-+ if (unlikely(!xino.ino))
-+ arg->err = -EIO;
-+#if 0
-+ //xino.h_gen = AuXino_INVALID_HGEN;
-+ h_inode = ilookup(sbr_sb(sb, bend), h_ino);
-+ if (h_inode) {
-+ if (!is_bad_inode(h_inode)) {
-+ xino.h_gen = h_inode->i_generation;
-+ WARN_ON(xino.h_gen == AuXino_INVALID_HGEN);
-+ }
-+ iput(h_inode);
-+ }
-+#endif
-+ arg->err = xino_write(sb, bend, h_ino, &xino);
-+ }
-+ if (!arg->err)
-+ arg->err = append_de(arg->vdir, name, namelen, xino.ino,
-+ d_type, arg->delist + bend);
-+ } else {
-+ name += AUFS_WH_PFX_LEN;
-+ namelen -= AUFS_WH_PFX_LEN;
-+ for (bindex = 0; bindex < bend; bindex++)
-+ if (test_known_wh(arg->whlist + bend, name, namelen))
-+ goto out; /* already whiteouted */
-+ arg->err = append_wh(arg->whlist + bend, name, namelen, bend);
-+ }
-+
-+ out:
-+ if (!arg->err)
-+ arg->vdir->vd_jiffy = jiffies;
-+ //smp_mb();
-+ TraceErr(arg->err);
-+ return arg->err;
-+}
-+
-+static int read_vdir(struct file *file, int may_read)
-+{
-+ int err, do_read, dlgt;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct aufs_vdir *vdir, *allocated;
-+ unsigned long expire;
-+ struct fillvdir_arg arg;
-+ aufs_bindex_t bindex, bend, bstart;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, may %d\n", DLNPair(dentry), may_read);
-+ FiMustWriteLock(file);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(!S_ISDIR(inode->i_mode));
-+
-+ err = 0;
-+ allocated = NULL;
-+ do_read = 0;
-+ sb = inode->i_sb;
-+ expire = stosi(sb)->si_rdcache;
-+ vdir = ivdir(inode);
-+ if (!vdir) {
-+ DEBUG_ON(fvdir_cache(file));
-+ do_read = 1;
-+ vdir = alloc_vdir();
-+ err = PTR_ERR(vdir);
-+ if (IS_ERR(vdir))
-+ goto out;
-+ err = 0;
-+ allocated = vdir;
-+ } else if (may_read
-+ && (inode->i_version != vdir->vd_version
-+ || time_after(jiffies, vdir->vd_jiffy + expire))) {
-+ LKTRTrace("iver %lu, vdver %lu, exp %lu\n",
-+ inode->i_version, vdir->vd_version,
-+ vdir->vd_jiffy + expire);
-+ do_read = 1;
-+ err = reinit_vdir(vdir);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+ //DbgVdir(vdir); goto out;
-+
-+ if (!do_read)
-+ return 0; /* success */
-+
-+ err = -ENOMEM;
-+ bend = fbend(file);
-+ arg.delist = kmalloc(sizeof(*arg.delist) * (bend + 1), GFP_KERNEL);
-+ if (unlikely(!arg.delist))
-+ goto out_vdir;
-+ arg.whlist = kmalloc(sizeof(*arg.whlist) * (bend + 1), GFP_KERNEL);
-+ if (unlikely(!arg.whlist))
-+ goto out_delist;
-+ err = 0;
-+ for (bindex = 0; bindex <= bend; bindex++) {
-+ nhash_init(arg.delist + bindex);
-+ nhash_init(arg.whlist + bindex);
-+ }
-+
-+ dlgt = need_dlgt(sb);
-+ arg.file = file;
-+ arg.vdir = vdir;
-+ bstart = fbstart(file);
-+ for (bindex = bstart; !err && bindex <= bend; bindex++) {
-+ struct file *hf;
-+ struct inode *h_inode;
-+
-+ hf = au_h_fptr_i(file, bindex);
-+ if (!hf)
-+ continue;
-+
-+ h_inode = hf->f_dentry->d_inode;
-+ //hf->f_pos = 0;
-+ arg.bindex = bindex;
-+ do {
-+ arg.err = 0;
-+ arg.called = 0;
-+ //smp_mb();
-+ err = vfsub_readdir(hf, fillvdir, &arg, dlgt);
-+ if (err >= 0)
-+ err = arg.err;
-+ } while (!err && arg.called);
-+ }
-+
-+ for (bindex = bstart; bindex <= bend; bindex++) {
-+ free_dehlist(arg.delist + bindex);
-+ nhash_fin(arg.whlist + bindex);
-+ }
-+ kfree(arg.whlist);
-+
-+ out_delist:
-+ kfree(arg.delist);
-+ out_vdir:
-+ if (!err) {
-+ //file->f_pos = 0;
-+ vdir->vd_version = inode->i_version;
-+ vdir->vd_last.i = 0;
-+ vdir->vd_last.p.deblk = vdir->vd_deblk[0];
-+ if (allocated)
-+ set_ivdir(inode, allocated);
-+ } else if (allocated)
-+ free_vdir(allocated);
-+ //DbgVdir(vdir); goto out;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int copy_vdir(struct aufs_vdir *tgt, struct aufs_vdir *src)
-+{
-+ int err, i, rerr, n;
-+
-+ TraceEnter();
-+ DEBUG_ON(tgt->vd_nblk != 1);
-+ //DbgVdir(tgt);
-+
-+ err = -ENOMEM;
-+ if (tgt->vd_nblk < src->vd_nblk) {
-+ aufs_deblk_t **p;
-+ p = au_kzrealloc(tgt->vd_deblk, sizeof(*p) * tgt->vd_nblk,
-+ sizeof(*p) * src->vd_nblk, GFP_KERNEL);
-+ if (unlikely(!p))
-+ goto out;
-+ tgt->vd_deblk = p;
-+ }
-+
-+ n = tgt->vd_nblk = src->vd_nblk;
-+ memcpy(tgt->vd_deblk[0], src->vd_deblk[0], AUFS_DEBLK_SIZE);
-+ //tgt->vd_last.i = 0;
-+ //tgt->vd_last.p.deblk = tgt->vd_deblk[0];
-+ tgt->vd_version = src->vd_version;
-+ tgt->vd_jiffy = src->vd_jiffy;
-+
-+ for (i = 1; i < n; i++) {
-+ tgt->vd_deblk[i] = kmalloc(AUFS_DEBLK_SIZE, GFP_KERNEL);
-+ if (tgt->vd_deblk[i])
-+ memcpy(tgt->vd_deblk[i], src->vd_deblk[i],
-+ AUFS_DEBLK_SIZE);
-+ else
-+ goto out;
-+ }
-+ //smp_mb();
-+ //DbgVdir(tgt);
-+ return 0; /* success */
-+
-+ out:
-+ rerr = reinit_vdir(tgt);
-+ BUG_ON(rerr);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_init_vdir(struct file *file)
-+{
-+ int err;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct aufs_vdir *vdir_cache, *allocated;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld\n", DLNPair(dentry), file->f_pos);
-+ FiMustWriteLock(file);
-+ inode = dentry->d_inode;
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(!S_ISDIR(inode->i_mode));
-+
-+ err = read_vdir(file, !file->f_pos);
-+ if (unlikely(err))
-+ goto out;
-+ //DbgVdir(ivdir(inode)); goto out;
-+
-+ allocated = NULL;
-+ vdir_cache = fvdir_cache(file);
-+ if (!vdir_cache) {
-+ vdir_cache = alloc_vdir();
-+ err = PTR_ERR(vdir_cache);
-+ if (IS_ERR(vdir_cache))
-+ goto out;
-+ allocated = vdir_cache;
-+ } else if (!file->f_pos && vdir_cache->vd_version != file->f_version) {
-+ err = reinit_vdir(vdir_cache);
-+ if (unlikely(err))
-+ goto out;
-+ } else
-+ return 0; /* success */
-+ //err = 0; DbgVdir(vdir_cache); goto out;
-+
-+ err = copy_vdir(vdir_cache, ivdir(inode));
-+ if (!err) {
-+ file->f_version = inode->i_version;
-+ if (allocated)
-+ set_fvdir_cache(file, allocated);
-+ } else if (allocated)
-+ free_vdir(allocated);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static loff_t calc_offset(struct aufs_vdir *vdir)
-+{
-+ loff_t offset;
-+ union aufs_deblk_p p;
-+
-+ p.deblk = vdir->vd_deblk[vdir->vd_last.i];
-+ offset = vdir->vd_last.p.p - p.p;
-+ offset += sizeof(*p.deblk) * vdir->vd_last.i;
-+ return offset;
-+}
-+
-+/* returns true or false */
-+static int seek_vdir(struct file *file)
-+{
-+ int valid, i, n;
-+ struct dentry *dentry;
-+ struct aufs_vdir *vdir_cache;
-+ loff_t offset;
-+ union aufs_deblk_p p, deblk_end;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld\n", DLNPair(dentry), file->f_pos);
-+ vdir_cache = fvdir_cache(file);
-+ DEBUG_ON(!vdir_cache);
-+ //DbgVdir(vdir_cache);
-+
-+ valid = 1;
-+ offset = calc_offset(vdir_cache);
-+ LKTRTrace("offset %Ld\n", offset);
-+ if (file->f_pos == offset)
-+ goto out;
-+
-+ vdir_cache->vd_last.i = 0;
-+ vdir_cache->vd_last.p.deblk = vdir_cache->vd_deblk[0];
-+ if (!file->f_pos)
-+ goto out;
-+
-+ valid = 0;
-+ i = file->f_pos / AUFS_DEBLK_SIZE;
-+ LKTRTrace("i %d\n", i);
-+ if (i >= vdir_cache->vd_nblk)
-+ goto out;
-+
-+ n = vdir_cache->vd_nblk;
-+ //DbgVdir(vdir_cache);
-+ for (; i < n; i++) {
-+ p.deblk = vdir_cache->vd_deblk[i];
-+ deblk_end.deblk = p.deblk + 1;
-+ offset = i * AUFS_DEBLK_SIZE;
-+ while (!is_deblk_end(&p, &deblk_end) && offset < file->f_pos) {
-+ int l;
-+ l = calc_size(p.de->de_str.len);
-+ offset += l;
-+ p.p += l;
-+ }
-+ if (!is_deblk_end(&p, &deblk_end)) {
-+ valid = 1;
-+ vdir_cache->vd_last.i = i;
-+ vdir_cache->vd_last.p = p;
-+ break;
-+ }
-+ }
-+
-+ out:
-+ //smp_mb();
-+ //DbgVdir(vdir_cache);
-+ TraceErr(!valid);
-+ return valid;
-+}
-+
-+int au_fill_de(struct file *file, void *dirent, filldir_t filldir)
-+{
-+ int err, l;
-+ struct dentry *dentry;
-+ struct aufs_vdir *vdir_cache;
-+ struct aufs_de *de;
-+ union aufs_deblk_p deblk_end;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld\n", DLNPair(dentry), file->f_pos);
-+ vdir_cache = fvdir_cache(file);
-+ DEBUG_ON(!vdir_cache);
-+ //DbgVdir(vdir_cache);
-+
-+ if (!seek_vdir(file))
-+ return 0;
-+
-+ while (1) {
-+ deblk_end.deblk
-+ = vdir_cache->vd_deblk[vdir_cache->vd_last.i] + 1;
-+ while (!is_deblk_end(&vdir_cache->vd_last.p, &deblk_end)) {
-+ de = vdir_cache->vd_last.p.de;
-+ LKTRTrace("%.*s, off%Ld, i%lu, dt%d\n",
-+ de->de_str.len, de->de_str.name,
-+ file->f_pos, de->de_ino, de->de_type);
-+ err = filldir(dirent, de->de_str.name, de->de_str.len,
-+ file->f_pos, de->de_ino, de->de_type);
-+ if (unlikely(err)) {
-+ TraceErr(err);
-+ //return err;
-+ //todo: ignore the error caused by udba.
-+ return 0;
-+ }
-+
-+ l = calc_size(de->de_str.len);
-+ vdir_cache->vd_last.p.p += l;
-+ file->f_pos += l;
-+ }
-+ if (vdir_cache->vd_last.i < vdir_cache->vd_nblk - 1) {
-+ vdir_cache->vd_last.i++;
-+ vdir_cache->vd_last.p.deblk
-+ = vdir_cache->vd_deblk[vdir_cache->vd_last.i];
-+ file->f_pos = sizeof(*vdir_cache->vd_last.p.deblk)
-+ * vdir_cache->vd_last.i;
-+ continue;
-+ }
-+ break;
-+ }
-+
-+ //smp_mb();
-+ return 0;
-+}
-diff --git a/fs/aufs/vfsub.c b/fs/aufs/vfsub.c
-new file mode 100755
-index 0000000..8571d21
---- /dev/null
-+++ b/fs/aufs/vfsub.c
-@@ -0,0 +1,665 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: vfsub.c,v 1.5 2007/04/23 00:55:06 sfjro Exp $ */
-+// I'm going to slightly mad
-+
-+#include "aufs.h"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DLGT
-+struct permission_args {
-+ int *errp;
-+ struct inode *inode;
-+ int mask;
-+ struct nameidata *nd;
-+};
-+
-+static void call_permission(void *args)
-+{
-+ struct permission_args *a = args;
-+ *a->errp = do_vfsub_permission(a->inode, a->mask, a->nd);
-+}
-+
-+int vfsub_permission(struct inode *inode, int mask, struct nameidata *nd,
-+ int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_permission(inode, mask, nd);
-+ else {
-+ int err;
-+ struct permission_args args = {
-+ .errp = &err,
-+ .inode = inode,
-+ .mask = mask,
-+ .nd = nd
-+ };
-+ au_wkq_wait(call_permission, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct create_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+ int mode;
-+ struct nameidata *nd;
-+};
-+
-+static void call_create(void *args)
-+{
-+ struct create_args *a = args;
-+ *a->errp = do_vfsub_create(a->dir, a->dentry, a->mode, a->nd);
-+}
-+
-+int vfsub_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_create(dir, dentry, mode, nd);
-+ else {
-+ int err;
-+ struct create_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry,
-+ .mode = mode,
-+ .nd = nd
-+ };
-+ au_wkq_wait(call_create, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct symlink_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+ const char *symname;
-+ int mode;
-+};
-+
-+static void call_symlink(void *args)
-+{
-+ struct symlink_args *a = args;
-+ *a->errp = do_vfsub_symlink(a->dir, a->dentry, a->symname, a->mode);
-+}
-+
-+int vfsub_symlink(struct inode *dir, struct dentry *dentry, const char *symname,
-+ int mode, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_symlink(dir, dentry, symname, mode);
-+ else {
-+ int err;
-+ struct symlink_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry,
-+ .symname = symname,
-+ .mode = mode
-+ };
-+ au_wkq_wait(call_symlink, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct mknod_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+ int mode;
-+ dev_t dev;
-+};
-+
-+static void call_mknod(void *args)
-+{
-+ struct mknod_args *a = args;
-+ *a->errp = do_vfsub_mknod(a->dir, a->dentry, a->mode, a->dev);
-+}
-+
-+int vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev,
-+ int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_mknod(dir, dentry, mode, dev);
-+ else {
-+ int err;
-+ struct mknod_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry,
-+ .mode = mode,
-+ .dev = dev
-+ };
-+ au_wkq_wait(call_mknod, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct mkdir_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+ int mode;
-+};
-+
-+static void call_mkdir(void *args)
-+{
-+ struct mkdir_args *a = args;
-+ *a->errp = do_vfsub_mkdir(a->dir, a->dentry, a->mode);
-+}
-+
-+int vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_mkdir(dir, dentry, mode);
-+ else {
-+ int err;
-+ struct mkdir_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry,
-+ .mode = mode
-+ };
-+ au_wkq_wait(call_mkdir, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct link_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *src_dentry, *dentry;
-+};
-+
-+static void call_link(void *args)
-+{
-+ struct link_args *a = args;
-+ *a->errp = do_vfsub_link(a->src_dentry, a->dir, a->dentry);
-+}
-+
-+int vfsub_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_link(src_dentry, dir, dentry);
-+ else {
-+ int err;
-+ struct link_args args = {
-+ .errp = &err,
-+ .src_dentry = src_dentry,
-+ .dir = dir,
-+ .dentry = dentry
-+ };
-+ au_wkq_wait(call_link, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct rename_args {
-+ int *errp;
-+ struct inode *src_dir, *dir;
-+ struct dentry *src_dentry, *dentry;
-+};
-+
-+static void call_rename(void *args)
-+{
-+ struct rename_args *a = args;
-+ *a->errp = do_vfsub_rename(a->src_dir, a->src_dentry, a->dir,
-+ a->dentry);
-+}
-+
-+int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_rename(src_dir, src_dentry, dir, dentry);
-+ else {
-+ int err;
-+ struct rename_args args = {
-+ .errp = &err,
-+ .src_dir = src_dir,
-+ .src_dentry = src_dentry,
-+ .dir = dir,
-+ .dentry = dentry
-+ };
-+ au_wkq_wait(call_rename, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct rmdir_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+};
-+
-+static void call_rmdir(void *args)
-+{
-+ struct rmdir_args *a = args;
-+ *a->errp = do_vfsub_rmdir(a->dir, a->dentry);
-+}
-+
-+int vfsub_rmdir(struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_rmdir(dir, dentry);
-+ else {
-+ int err;
-+ struct rmdir_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry
-+ };
-+ au_wkq_wait(call_rmdir, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct read_args {
-+ ssize_t *errp;
-+ struct file *file;
-+ union {
-+ void *kbuf;
-+ char __user *ubuf;
-+ };
-+ size_t count;
-+ loff_t *ppos;
-+};
-+
-+static void call_read_k(void *args)
-+{
-+ struct read_args *a = args;
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(a->file->f_dentry), (unsigned long)a->count,
-+ *a->ppos);
-+ *a->errp = do_vfsub_read_k(a->file, a->kbuf, a->count, a->ppos);
-+}
-+
-+ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_read_u(file, ubuf, count, ppos);
-+ else {
-+ ssize_t err, read;
-+ struct read_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .count = count,
-+ .ppos = ppos
-+ };
-+
-+ if (unlikely(!count))
-+ return 0;
-+
-+ /*
-+ * workaround an application bug.
-+ * generally, read(2) or write(2) may return the value shorter
-+ * than requested. But many applications don't support it,
-+ * for example bash.
-+ */
-+ err = -ENOMEM;
-+ if (args.count > PAGE_SIZE)
-+ args.count = PAGE_SIZE;
-+ args.kbuf = kmalloc(args.count, GFP_KERNEL);
-+ if (unlikely(!args.kbuf))
-+ goto out;
-+
-+ read = 0;
-+ do {
-+ au_wkq_wait(call_read_k, &args, /*dlgt*/1);
-+ if (unlikely(err > 0
-+ && copy_to_user(ubuf, args.kbuf, err))) {
-+ err = -EFAULT;
-+ goto out_free;
-+ } else if (!err)
-+ break;
-+ else if (unlikely(err < 0))
-+ goto out_free;
-+ count -= err;
-+ /* do not read too much because of file i/o pointer */
-+ if (unlikely(count < args.count))
-+ args.count = count;
-+ ubuf += err;
-+ read += err;
-+ } while (count);
-+ smp_mb();
-+ err = read;
-+
-+ out_free:
-+ kfree(args.kbuf);
-+ out:
-+ return err;
-+ }
-+}
-+
-+ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_read_k(file, kbuf, count, ppos);
-+ else {
-+ ssize_t err;
-+ struct read_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .count = count,
-+ .ppos = ppos
-+ };
-+ args.kbuf = kbuf;
-+ au_wkq_wait(call_read_k, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct write_args {
-+ ssize_t *errp;
-+ struct file *file;
-+ union {
-+ void *kbuf;
-+ const char __user *ubuf;
-+ };
-+ void *buf;
-+ size_t count;
-+ loff_t *ppos;
-+};
-+
-+static void call_write_k(void *args)
-+{
-+ struct write_args *a = args;
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(a->file->f_dentry), (unsigned long)a->count,
-+ *a->ppos);
-+ *a->errp = do_vfsub_write_k(a->file, a->kbuf, a->count, a->ppos);
-+}
-+
-+ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_write_u(file, ubuf, count, ppos);
-+ else {
-+ ssize_t err, written;
-+ struct write_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .count = count,
-+ .ppos = ppos
-+ };
-+
-+ if (unlikely(!count))
-+ return 0;
-+
-+ /*
-+ * workaround an application bug.
-+ * generally, read(2) or write(2) may return the value shorter
-+ * than requested. But many applications don't support it,
-+ * for example bash.
-+ */
-+ err = -ENOMEM;
-+ if (args.count > PAGE_SIZE)
-+ args.count = PAGE_SIZE;
-+ args.kbuf = kmalloc(args.count, GFP_KERNEL);
-+ if (unlikely(!args.kbuf))
-+ goto out;
-+
-+ written = 0;
-+ do {
-+ if (unlikely(copy_from_user(args.kbuf, ubuf, args.count))) {
-+ err = -EFAULT;
-+ goto out_free;
-+ }
-+
-+ au_wkq_wait(call_write_k, &args, /*dlgt*/1);
-+ if (err > 0) {
-+ count -= err;
-+ if (count < args.count)
-+ args.count = count;
-+ ubuf += err;
-+ written += err;
-+ } else if (!err)
-+ break;
-+ else if (unlikely(err < 0))
-+ goto out_free;
-+ } while (count);
-+ err = written;
-+
-+ out_free:
-+ kfree(args.kbuf);
-+ out:
-+ return err;
-+ }
-+}
-+
-+ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_write_k(file, kbuf, count, ppos);
-+ else {
-+ ssize_t err;
-+ struct write_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .count = count,
-+ .ppos = ppos
-+ };
-+ args.kbuf = kbuf;
-+ au_wkq_wait(call_write_k, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct readdir_args {
-+ int *errp;
-+ struct file *file;
-+ filldir_t filldir;
-+ void *arg;
-+};
-+
-+static void call_readdir(void *args)
-+{
-+ struct readdir_args *a = args;
-+ *a->errp = do_vfsub_readdir(a->file, a->filldir, a->arg);
-+}
-+
-+int vfsub_readdir(struct file *file, filldir_t filldir, void *arg, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_readdir(file, filldir, arg);
-+ else {
-+ int err;
-+ struct readdir_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .filldir = filldir,
-+ .arg = arg
-+ };
-+ au_wkq_wait(call_readdir, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+#endif /* CONFIG_AUFS_DLGT */
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct notify_change_args {
-+ int *errp;
-+ struct dentry *h_dentry;
-+ struct iattr *ia;
-+};
-+
-+static void call_notify_change(void *args)
-+{
-+ struct notify_change_args *a = args;
-+ struct inode *h_inode;
-+
-+ LKTRTrace("%.*s, ia_valid 0x%x\n",
-+ DLNPair(a->h_dentry), a->ia->ia_valid);
-+ h_inode = a->h_dentry->d_inode;
-+ IMustLock(h_inode);
-+
-+ *a->errp = -EPERM;
-+ if (!IS_IMMUTABLE(h_inode) && !IS_APPEND(h_inode)) {
-+ lockdep_off();
-+ *a->errp = notify_change(a->h_dentry, a->ia);
-+ lockdep_on();
-+ }
-+ TraceErr(*a->errp);
-+}
-+
-+int vfsub_notify_change(struct dentry *dentry, struct iattr *ia, int dlgt)
-+{
-+ int err;
-+ struct notify_change_args args = {
-+ .errp = &err,
-+ .h_dentry = dentry,
-+ .ia = ia
-+ };
-+
-+#ifndef CONFIG_AUFS_DLGT
-+ call_notify_change(&args);
-+#else
-+ if (!dlgt)
-+ call_notify_change(&args);
-+ else
-+ au_wkq_wait(call_notify_change, &args, /*dlgt*/1);
-+#endif
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct unlink_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+};
-+
-+static void call_unlink(void *args)
-+{
-+ struct unlink_args *a = args;
-+ struct inode *h_inode;
-+ const int stop_sillyrename = (au_is_nfs(a->dentry->d_sb)
-+ && atomic_read(&a->dentry->d_count) == 1);
-+
-+ LKTRTrace("%.*s, stop_silly %d, cnt %d\n",
-+ DLNPair(a->dentry), stop_sillyrename,
-+ atomic_read(&a->dentry->d_count));
-+ IMustLock(a->dir);
-+
-+ if (!stop_sillyrename)
-+ dget(a->dentry);
-+ h_inode = a->dentry->d_inode;
-+ if (h_inode)
-+ atomic_inc(&h_inode->i_count);
-+#if 0 // partial testing
-+ {
-+ struct qstr *name = &a->dentry->d_name;
-+ if (name->len == sizeof(AUFS_XINO_FNAME) - 1
-+ && !strncmp(name->name, AUFS_XINO_FNAME, name->len)) {
-+ lockdep_off();
-+ *a->errp = vfs_unlink(a->dir, a->dentry);
-+ lockdep_on();
-+ } else
-+ err = -1;
-+ }
-+#else
-+ // vfs_unlink() locks inode
-+ lockdep_off();
-+ *a->errp = vfs_unlink(a->dir, a->dentry);
-+ lockdep_on();
-+#endif
-+
-+ if (!stop_sillyrename)
-+ dput(a->dentry);
-+ if (h_inode)
-+ iput(h_inode);
-+
-+ TraceErr(*a->errp);
-+}
-+
-+/*
-+ * @dir: must be locked.
-+ * @dentry: target dentry.
-+ */
-+int vfsub_unlink(struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ int err;
-+ struct unlink_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry
-+ };
-+
-+#ifndef CONFIG_AUFS_DLGT
-+ call_unlink(&args);
-+#else
-+ if (!dlgt)
-+ call_unlink(&args);
-+ else
-+ au_wkq_wait(call_unlink, &args, /*dlgt*/1);
-+#endif
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct statfs_args {
-+ int *errp;
-+ void *arg;
-+ struct kstatfs *buf;
-+};
-+
-+static void call_statfs(void *args)
-+{
-+ struct statfs_args *a = args;
-+ *a->errp = vfs_statfs(a->arg, a->buf);
-+}
-+
-+int vfsub_statfs(void *arg, struct kstatfs *buf, int dlgt)
-+{
-+ int err;
-+ struct statfs_args args = {
-+ .errp = &err,
-+ .arg = arg,
-+ .buf = buf
-+ };
-+
-+#ifndef CONFIG_AUFS_DLGT
-+ call_statfs(&args);
-+#else
-+ if (!dlgt)
-+ call_statfs(&args);
-+ else
-+ au_wkq_wait(call_statfs, &args, /*dlgt*/1);
-+#endif
-+ return err;
-+}
-diff --git a/fs/aufs/vfsub.h b/fs/aufs/vfsub.h
-new file mode 100755
-index 0000000..52f15cc
---- /dev/null
-+++ b/fs/aufs/vfsub.h
-@@ -0,0 +1,427 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: vfsub.h,v 1.8 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+#ifndef __AUFS_VFSUB_H__
-+#define __AUFS_VFSUB_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <asm/uaccess.h>
-+#include "wkq.h"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* simple abstractions, for future use */
-+static inline
-+int do_vfsub_permission(struct inode *inode, int mask, struct nameidata *nd)
-+{
-+ LKTRTrace("i%lu, mask 0x%x, nd %p\n", inode->i_ino, mask, nd);
-+#if 0
-+#else
-+ return permission(inode, mask, nd);
-+#endif
-+}
-+
-+static inline
-+struct file *vfsub_filp_open(const char *path, int oflags, int mode)
-+{
-+ struct file *err;
-+
-+ LKTRTrace("%s\n", path);
-+
-+ lockdep_off();
-+ err = filp_open(path, oflags, mode);
-+ lockdep_on();
-+ return err;
-+}
-+
-+static inline
-+int vfsub_path_lookup(const char *name, unsigned int flags,
-+ struct nameidata *nd)
-+{
-+ int err;
-+
-+ LKTRTrace("%s\n", name);
-+
-+ //lockdep_off();
-+ err = path_lookup(name, flags, nd);
-+ //lockdep_on();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+int do_vfsub_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd)
-+{
-+ LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, DLNPair(dentry), mode);
-+#if 0
-+#else
-+ return vfs_create(dir, dentry, mode, nd);
-+#endif
-+}
-+
-+static inline
-+int do_vfsub_symlink(struct inode *dir, struct dentry *dentry,
-+ const char *symname, int mode)
-+{
-+ LKTRTrace("i%lu, %.*s, %s, 0x%x\n",
-+ dir->i_ino, DLNPair(dentry), symname, mode);
-+#if 0
-+#else
-+ return vfs_symlink(dir, dentry, symname, mode);
-+#endif
-+}
-+
-+static inline
-+int do_vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ dev_t dev)
-+{
-+ LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, DLNPair(dentry), mode);
-+#if 0
-+#else
-+ return vfs_mknod(dir, dentry, mode, dev);
-+#endif
-+}
-+
-+static inline
-+int do_vfsub_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry)
-+{
-+ int err;
-+
-+ LKTRTrace("%.*s, i%lu, %.*s\n",
-+ DLNPair(src_dentry), dir->i_ino, DLNPair(dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_link(src_dentry, dir, dentry);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+static inline
-+int do_vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry)
-+{
-+ int err;
-+
-+ LKTRTrace("i%lu, %.*s, i%lu, %.*s\n",
-+ src_dir->i_ino, DLNPair(src_dentry),
-+ dir->i_ino, DLNPair(dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_rename(src_dir, src_dentry, dir, dentry);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+static inline
-+int do_vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-+{
-+ LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, DLNPair(dentry), mode);
-+#if 0
-+#else
-+ return vfs_mkdir(dir, dentry, mode);
-+#endif
-+}
-+
-+static inline int do_vfsub_rmdir(struct inode *dir, struct dentry *dentry)
-+{
-+ int err;
-+
-+ LKTRTrace("i%lu, %.*s\n", dir->i_ino, DLNPair(dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_rmdir(dir, dentry);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+ssize_t do_vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
-+ loff_t *ppos)
-+{
-+ ssize_t err;
-+
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(file->f_dentry), (unsigned long)count, *ppos);
-+
-+ /* nfs uses some locks */
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_read(file, ubuf, count, ppos);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+// kernel_read() ??
-+static inline
-+ssize_t do_vfsub_read_k(struct file *file, void *kbuf, size_t count,
-+ loff_t *ppos)
-+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = do_vfsub_read_u(file, (char __user*)kbuf, count, ppos);
-+ set_fs(oldfs);
-+ return err;
-+}
-+
-+static inline
-+ssize_t do_vfsub_write_u(struct file *file, const char __user *ubuf,
-+ size_t count, loff_t *ppos)
-+{
-+ ssize_t err;
-+
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(file->f_dentry), (unsigned long)count, *ppos);
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_write(file, ubuf, count, ppos);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+static inline
-+ssize_t do_vfsub_write_k(struct file *file, void *kbuf, size_t count,
-+ loff_t *ppos)
-+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = do_vfsub_write_u(file, (const char __user*)kbuf, count, ppos);
-+ set_fs(oldfs);
-+ return err;
-+}
-+
-+static inline
-+int do_vfsub_readdir(struct file *file, filldir_t filldir, void *arg)
-+{
-+ int err;
-+
-+ LKTRTrace("%.*s\n", DLNPair(file->f_dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_readdir(file, filldir, arg);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline loff_t vfsub_llseek(struct file *file, loff_t offset, int origin)
-+{
-+ loff_t err;
-+
-+ LKTRTrace("%.*s\n", DLNPair(file->f_dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_llseek(file, offset, origin);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DLGT
-+static inline int need_dlgt(struct super_block *sb)
-+{
-+ return (au_flag_test(sb, AuFlag_DLGT) && !is_au_wkq(current));
-+}
-+
-+int vfsub_permission(struct inode *inode, int mask, struct nameidata *nd,
-+ int dlgt);
-+
-+int vfsub_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd, int dlgt);
-+int vfsub_symlink(struct inode *dir, struct dentry *dentry, const char *symname,
-+ int mode, int dlgt);
-+int vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev,
-+ int dlgt);
-+int vfsub_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry, int dlgt);
-+int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry, int dlgt);
-+int vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode, int dlgt);
-+int vfsub_rmdir(struct inode *dir, struct dentry *dentry, int dlgt);
-+
-+ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt);
-+ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt);
-+ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt);
-+ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt);
-+int vfsub_readdir(struct file *file, filldir_t filldir, void *arg, int dlgt);
-+
-+#else
-+
-+static inline int need_dlgt(struct super_block *sb)
-+{
-+ return 0;
-+}
-+
-+static inline
-+int vfsub_permission(struct inode *inode, int mask, struct nameidata *nd,
-+ int dlgt)
-+{
-+ return do_vfsub_permission(inode, mask, nd);
-+}
-+
-+static inline
-+int vfsub_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd, int dlgt)
-+{
-+ return do_vfsub_create(dir, dentry, mode, nd);
-+}
-+
-+static inline
-+int vfsub_symlink(struct inode *dir, struct dentry *dentry, const char *symname,
-+ int mode, int dlgt)
-+{
-+ return do_vfsub_symlink(dir, dentry, symname, mode);
-+}
-+
-+static inline
-+int vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev,
-+ int dlgt)
-+{
-+ return do_vfsub_mknod(dir, dentry, mode, dev);
-+}
-+
-+static inline
-+int vfsub_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry, int dlgt)
-+{
-+ return do_vfsub_link(src_dentry, dir, dentry);
-+}
-+
-+static inline
-+int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ return do_vfsub_rename(src_dir, src_dentry, dir, dentry);
-+}
-+
-+static inline
-+int vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode,
-+ int dlgt)
-+{
-+ return do_vfsub_mkdir(dir, dentry, mode);
-+}
-+
-+static inline
-+int vfsub_rmdir(struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ return do_vfsub_rmdir(dir, dentry);
-+}
-+
-+static inline
-+ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt)
-+{
-+ return do_vfsub_read_u(file, ubuf, count, ppos);
-+}
-+
-+static inline
-+ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt)
-+{
-+ return do_vfsub_read_k(file, kbuf, count, ppos);
-+}
-+
-+static inline
-+ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt)
-+{
-+ return do_vfsub_write_u(file, ubuf, count, ppos);
-+}
-+
-+static inline
-+ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt)
-+{
-+ return do_vfsub_write_k(file, kbuf, count, ppos);
-+}
-+
-+static inline
-+int vfsub_readdir(struct file *file, filldir_t filldir, void *arg, int dlgt)
-+{
-+ return do_vfsub_readdir(file, filldir, arg);
-+}
-+#endif /* CONFIG_AUFS_DLGT */
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+struct dentry *vfsub_lock_rename(struct dentry *d1, struct dentry *d2)
-+{
-+ struct dentry *d;
-+
-+ lockdep_off();
-+ d = lock_rename(d1, d2);
-+ lockdep_on();
-+ return d;
-+}
-+
-+static inline void vfsub_unlock_rename(struct dentry *d1, struct dentry *d2)
-+{
-+ lockdep_off();
-+ unlock_rename(d1, d2);
-+ lockdep_on();
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int vfsub_notify_change(struct dentry *dentry, struct iattr *ia, int dlgt);
-+int vfsub_unlink(struct inode *dir, struct dentry *dentry, int dlgt);
-+int vfsub_statfs(void *arg, struct kstatfs *buf, int dlgt);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_VFSUB_H__ */
-diff --git a/fs/aufs/whout.c b/fs/aufs/whout.c
-new file mode 100755
-index 0000000..b7f874c
---- /dev/null
-+++ b/fs/aufs/whout.c
-@@ -0,0 +1,933 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: whout.c,v 1.14 2007/05/14 03:40:40 sfjro Exp $ */
-+
-+#include <linux/fs.h>
-+#include <linux/namei.h>
-+#include <linux/random.h>
-+#include <linux/security.h>
-+#include "aufs.h"
-+
-+#define WH_MASK S_IRUGO
-+
-+/* If a directory contains this file, then it is opaque. We start with the
-+ * .wh. flag so that it is blocked by lookup.
-+ */
-+static struct qstr diropq_name = {
-+ .name = AUFS_WH_DIROPQ,
-+ .len = sizeof(AUFS_WH_DIROPQ) - 1
-+};
-+
-+/*
-+ * generate whiteout name, which is NOT terminated by NULL.
-+ * @name: original d_name.name
-+ * @len: original d_name.len
-+ * @wh: whiteout qstr
-+ * returns zero when succeeds, otherwise error.
-+ * succeeded value as wh->name should be freed by au_free_whname().
-+ */
-+int au_alloc_whname(const char *name, int len, struct qstr *wh)
-+{
-+ char *p;
-+
-+ DEBUG_ON(!name || !len || !wh);
-+
-+ if (unlikely(len > PATH_MAX - AUFS_WH_PFX_LEN))
-+ return -ENAMETOOLONG;
-+
-+ wh->len = len + AUFS_WH_PFX_LEN;
-+ wh->name = p = kmalloc(wh->len, GFP_KERNEL);
-+ //if (LktrCond) {kfree(p); wh->name = p = NULL;}
-+ if (p) {
-+ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN);
-+ memcpy(p + AUFS_WH_PFX_LEN, name, len);
-+ //smp_mb();
-+ return 0;
-+ }
-+ return -ENOMEM;
-+}
-+
-+void au_free_whname(struct qstr *wh)
-+{
-+ DEBUG_ON(!wh || !wh->name);
-+ kfree(wh->name);
-+#ifdef CONFIG_AUFS_DEBUG
-+ wh->name = NULL;
-+#endif
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * test if the @wh_name exists under @hidden_parent.
-+ * @try_sio specifies the necessary of super-io.
-+ */
-+int is_wh(struct dentry *hidden_parent, struct qstr *wh_name, int try_sio,
-+ struct lkup_args *lkup)
-+{
-+ int err;
-+ struct dentry *wh_dentry;
-+ struct inode *hidden_dir;
-+
-+ LKTRTrace("%.*s/%.*s, lkup{%p, %d}\n", DLNPair(hidden_parent),
-+ wh_name->len, wh_name->name, lkup->nfsmnt, lkup->dlgt);
-+ hidden_dir = hidden_parent->d_inode;
-+ DEBUG_ON(!S_ISDIR(hidden_dir->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ if (!try_sio)
-+ wh_dentry = lkup_one(wh_name->name, hidden_parent,
-+ wh_name->len, lkup);
-+ else
-+ wh_dentry = sio_lkup_one(wh_name->name, hidden_parent,
-+ wh_name->len, lkup);
-+ //if (LktrCond) {dput(wh_dentry); wh_dentry = ERR_PTR(-1);}
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ err = 0;
-+ if (!wh_dentry->d_inode)
-+ goto out_wh; /* success */
-+
-+ err = 1;
-+ if (S_ISREG(wh_dentry->d_inode->i_mode))
-+ goto out_wh; /* success */
-+
-+ err = -EIO;
-+ IOErr("%.*s Invalid whiteout entry type 0%o.\n",
-+ DLNPair(wh_dentry), wh_dentry->d_inode->i_mode);
-+
-+ out_wh:
-+ dput(wh_dentry);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * test if the @hidden_dentry sets opaque or not.
-+ */
-+int is_diropq(struct dentry *hidden_dentry, struct lkup_args *lkup)
-+{
-+ int err;
-+ struct inode *hidden_dir;
-+
-+ LKTRTrace("dentry %.*s\n", DLNPair(hidden_dentry));
-+ hidden_dir = hidden_dentry->d_inode;
-+ DEBUG_ON(!S_ISDIR(hidden_dir->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ err = is_wh(hidden_dentry, &diropq_name, /*try_sio*/1, lkup);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * returns a negative dentry whose name is unique and temporary.
-+ */
-+struct dentry *lkup_whtmp(struct dentry *hidden_parent, struct qstr *prefix,
-+ struct lkup_args *lkup)
-+{
-+#define HEX_LEN 4
-+ struct dentry *dentry;
-+ int len, i;
-+ char defname[AUFS_WH_PFX_LEN * 2 + DNAME_INLINE_LEN_MIN + 1
-+ + HEX_LEN + 1], *name, *p;
-+ static unsigned char cnt;
-+
-+ LKTRTrace("hp %.*s, prefix %.*s\n",
-+ DLNPair(hidden_parent), prefix->len, prefix->name);
-+ DEBUG_ON(!hidden_parent->d_inode);
-+ IMustLock(hidden_parent->d_inode);
-+
-+ name = defname;
-+ len = sizeof(defname) - DNAME_INLINE_LEN_MIN + prefix->len - 1;
-+ if (unlikely(prefix->len > DNAME_INLINE_LEN_MIN)) {
-+ dentry = ERR_PTR(-ENAMETOOLONG);
-+ if (unlikely(len >= PATH_MAX))
-+ goto out;
-+ dentry = ERR_PTR(-ENOMEM);
-+ name = kmalloc(len + 1, GFP_KERNEL);
-+ //if (LktrCond) {kfree(name); name = NULL;}
-+ if (unlikely(!name))
-+ goto out;
-+ }
-+
-+ // doubly whiteout-ed
-+ memcpy(name, AUFS_WH_PFX AUFS_WH_PFX, AUFS_WH_PFX_LEN * 2);
-+ p = name + AUFS_WH_PFX_LEN * 2;
-+ memcpy(p, prefix->name, prefix->len);
-+ p += prefix->len;
-+ *p++ = '.';
-+ DEBUG_ON(name + len + 1 - p <= HEX_LEN);
-+
-+ for (i = 0; i < 3; i++) {
-+ sprintf(p, "%.*d", HEX_LEN, cnt++);
-+ dentry = sio_lkup_one(name, hidden_parent, len, lkup);
-+ //if (LktrCond) {dput(dentry); dentry = ERR_PTR(-1);}
-+ if (unlikely(IS_ERR(dentry) || !dentry->d_inode))
-+ goto out_name;
-+ dput(dentry);
-+ }
-+ //Warn("could not get random name\n");
-+ dentry = ERR_PTR(-EEXIST);
-+ Dbg("%.*s\n", len, name);
-+ BUG();
-+
-+ out_name:
-+ if (unlikely(name != defname))
-+ kfree(name);
-+ out:
-+ TraceErrPtr(dentry);
-+ return dentry;
-+#undef HEX_LEN
-+}
-+
-+/*
-+ * rename the @dentry of @bindex to the whiteouted temporary name.
-+ */
-+int rename_whtmp(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ int err;
-+ struct inode *hidden_dir;
-+ struct dentry *hidden_dentry, *hidden_parent, *tmp_dentry;
-+ struct super_block *sb;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, b%d\n", DLNPair(dentry), bindex);
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ DEBUG_ON(!hidden_dentry || !hidden_dentry->d_inode);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ sb = dentry->d_sb;
-+ lkup.nfsmnt = au_nfsmnt(sb, bindex);
-+ lkup.dlgt = need_dlgt(sb);
-+ tmp_dentry = lkup_whtmp(hidden_parent, &hidden_dentry->d_name, &lkup);
-+ //if (LktrCond) {dput(tmp_dentry); tmp_dentry = ERR_PTR(-1);}
-+ err = PTR_ERR(tmp_dentry);
-+ if (!IS_ERR(tmp_dentry)) {
-+ /* under the same dir, no need to lock_rename() */
-+ err = vfsub_rename(hidden_dir, hidden_dentry,
-+ hidden_dir, tmp_dentry, lkup.dlgt);
-+ //if (LktrCond) err = -1; //unavailable
-+ TraceErr(err);
-+ dput(tmp_dentry);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int au_unlink_wh_dentry(struct inode *hidden_dir, struct dentry *wh_dentry,
-+ struct dentry *dentry, int dlgt)
-+{
-+ int err;
-+
-+ LKTRTrace("hi%lu, wh %.*s, d %p\n", hidden_dir->i_ino,
-+ DLNPair(wh_dentry), dentry);
-+ DEBUG_ON((dentry && dbwh(dentry) == -1)
-+ || !wh_dentry->d_inode
-+ || !S_ISREG(wh_dentry->d_inode->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ err = vfsub_unlink(hidden_dir, wh_dentry, dlgt);
-+ //if (LktrCond) err = -1; // unavailable
-+ if (!err && dentry)
-+ set_dbwh(dentry, -1);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int unlink_wh_name(struct dentry *hidden_parent, struct qstr *wh,
-+ struct lkup_args *lkup)
-+{
-+ int err;
-+ struct inode *hidden_dir;
-+ struct dentry *hidden_dentry;
-+
-+ LKTRTrace("%.*s/%.*s\n", DLNPair(hidden_parent), LNPair(wh));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ // au_test_perm() is already done
-+ hidden_dentry = lkup_one(wh->name, hidden_parent, wh->len, lkup);
-+ //if (LktrCond) {dput(hidden_dentry); hidden_dentry = ERR_PTR(-1);}
-+ if (!IS_ERR(hidden_dentry)) {
-+ err = 0;
-+ if (hidden_dentry->d_inode)
-+ err = vfsub_unlink(hidden_dir, hidden_dentry,
-+ lkup->dlgt);
-+ dput(hidden_dentry);
-+ } else
-+ err = PTR_ERR(hidden_dentry);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void clean_wh(struct inode *h_dir, struct dentry *wh)
-+{
-+ TraceEnter();
-+ if (wh->d_inode) {
-+ int err = vfsub_unlink(h_dir, wh, /*dlgt*/0);
-+ if (unlikely(err))
-+ Warn("failed unlink %.*s (%d), ignored.\n",
-+ DLNPair(wh), err);
-+ }
-+}
-+
-+static void clean_plink(struct inode *h_dir, struct dentry *plink)
-+{
-+ TraceEnter();
-+ if (plink->d_inode) {
-+ int err = vfsub_rmdir(h_dir, plink, /*dlgt*/0);
-+ if (unlikely(err))
-+ Warn("failed rmdir %.*s (%d), ignored.\n",
-+ DLNPair(plink), err);
-+ }
-+}
-+
-+static int test_linkable(struct inode *h_dir)
-+{
-+ if (h_dir->i_op && h_dir->i_op->link)
-+ return 0;
-+ return -ENOSYS;
-+}
-+
-+static int plink_dir(struct inode *h_dir, struct dentry *plink)
-+{
-+ int err;
-+
-+ err = -EEXIST;
-+ if (!plink->d_inode) {
-+ int mode = S_IRWXU;
-+ if (unlikely(au_is_nfs(plink->d_sb)))
-+ mode |= S_IXUGO;
-+ err = vfsub_mkdir(h_dir, plink, mode, /*dlgt*/0);
-+ } else if (S_ISDIR(plink->d_inode->i_mode))
-+ err = 0;
-+ else
-+ Err("unknown %.*s exists\n", DLNPair(plink));
-+
-+ return err;
-+}
-+
-+/*
-+ * initialize the whiteout base file/dir for @br.
-+ */
-+int init_wh(struct dentry *h_root, struct aufs_branch *br,
-+ struct vfsmount *nfsmnt, struct super_block *sb)
-+{
-+ int err;
-+ struct dentry *wh, *plink;
-+ struct inode *h_dir;
-+ static struct qstr base_name[] = {
-+ {.name = AUFS_WH_BASENAME, .len = sizeof(AUFS_WH_BASENAME) - 1},
-+ {.name = AUFS_WH_PLINKDIR, .len = sizeof(AUFS_WH_PLINKDIR) - 1}
-+ };
-+ struct lkup_args lkup = {
-+ .nfsmnt = nfsmnt,
-+ .dlgt = 0 // always no dlgt
-+ };
-+ const int do_plink = au_flag_test(sb, AuFlag_PLINK);
-+
-+ LKTRTrace("nfsmnt %p\n", nfsmnt);
-+ BrWhMustWriteLock(br);
-+ SiMustWriteLock(sb);
-+ h_dir = h_root->d_inode;
-+ IMustLock(h_dir);
-+
-+ // doubly whiteouted
-+ wh = lkup_wh(h_root, base_name + 0, &lkup);
-+ //if (LktrCond) {dput(wh); wh = ERR_PTR(-1);}
-+ err = PTR_ERR(wh);
-+ if (IS_ERR(wh))
-+ goto out;
-+ DEBUG_ON(br->br_wh && br->br_wh != wh);
-+
-+ plink = lkup_wh(h_root, base_name + 1, &lkup);
-+ err = PTR_ERR(plink);
-+ if (IS_ERR(plink))
-+ goto out_dput_wh;
-+ DEBUG_ON(br->br_plink && br->br_plink != plink);
-+
-+ dput(br->br_wh);
-+ dput(br->br_plink);
-+ br->br_wh = br->br_plink = NULL;
-+
-+ err = 0;
-+ switch (br->br_perm) {
-+ case AuBr_RR:
-+ case AuBr_RO:
-+ case AuBr_RRWH:
-+ case AuBr_ROWH:
-+ clean_wh(h_dir, wh);
-+ clean_plink(h_dir, plink);
-+ break;
-+
-+ case AuBr_RWNoLinkWH:
-+ clean_wh(h_dir, wh);
-+ if (do_plink) {
-+ err = test_linkable(h_dir);
-+ if (unlikely(err))
-+ goto out_nolink;
-+
-+ err = plink_dir(h_dir, plink);
-+ if (unlikely(err))
-+ goto out_err;
-+ br->br_plink = dget(plink);
-+ } else
-+ clean_plink(h_dir, plink);
-+ break;
-+
-+ case AuBr_RW:
-+ /*
-+ * for the moment, aufs supports the branch filesystem
-+ * which does not support link(2).
-+ * testing on FAT which does not support i_op->setattr() fully either,
-+ * copyup failed.
-+ * finally, such filesystem will not be used as the writable branch.
-+ */
-+ err = test_linkable(h_dir);
-+ if (unlikely(err))
-+ goto out_nolink;
-+
-+ err = -EEXIST;
-+ if (!wh->d_inode)
-+ err = vfsub_create(h_dir, wh, WH_MASK, NULL, /*dlgt*/0);
-+ else if (S_ISREG(wh->d_inode->i_mode))
-+ err = 0;
-+ else
-+ Err("unknown %.*s/%.*s exists\n",
-+ DLNPair(h_root), DLNPair(wh));
-+ if (unlikely(err))
-+ goto out_err;
-+
-+ if (do_plink) {
-+ err = plink_dir(h_dir, plink);
-+ if (unlikely(err))
-+ goto out_err;
-+ br->br_plink = dget(plink);
-+ } else
-+ clean_plink(h_dir, plink);
-+ br->br_wh = dget(wh);
-+ break;
-+
-+ default:
-+ BUG();
-+ }
-+
-+ out_dput:
-+ dput(plink);
-+ out_dput_wh:
-+ dput(wh);
-+ out:
-+ TraceErr(err);
-+ return err;
-+ out_nolink:
-+ Err("%.*s doesn't support link(2), use noplink and rw+nolwh\n",
-+ DLNPair(h_root));
-+ goto out_dput;
-+ out_err:
-+ Err("an error(%d) on the writable branch %.*s(%s)\n",
-+ err, DLNPair(h_root), au_sbtype(h_root->d_sb));
-+ goto out_dput;
-+}
-+
-+struct reinit_br_wh {
-+ struct super_block *sb;
-+ struct aufs_branch *br;
-+};
-+
-+static void reinit_br_wh(void *arg)
-+{
-+ int err;
-+ struct reinit_br_wh *a = arg;
-+ struct inode *hidden_dir, *dir;
-+ struct dentry *hidden_root;
-+ aufs_bindex_t bindex;
-+
-+ TraceEnter();
-+ DEBUG_ON(!a->br->br_wh || !a->br->br_wh->d_inode || current->fsuid);
-+
-+ err = 0;
-+ /* big lock */
-+ si_write_lock(a->sb);
-+ if (unlikely(!br_writable(a->br->br_perm)))
-+ goto out;
-+ bindex = find_brindex(a->sb, a->br->br_id);
-+ if (unlikely(bindex < 0))
-+ goto out;
-+
-+ dir = a->sb->s_root->d_inode;
-+ hidden_root = a->br->br_wh->d_parent;
-+ hidden_dir = hidden_root->d_inode;
-+ DEBUG_ON(!hidden_dir->i_op || !hidden_dir->i_op->link);
-+ hdir_lock(hidden_dir, dir, bindex);
-+ br_wh_write_lock(a->br);
-+ err = vfsub_unlink(hidden_dir, a->br->br_wh, /*dlgt*/0);
-+ //if (LktrCond) err = -1;
-+ dput(a->br->br_wh);
-+ a->br->br_wh = NULL;
-+ if (!err)
-+ err = init_wh(hidden_root, a->br, au_do_nfsmnt(a->br->br_mnt),
-+ a->sb);
-+ br_wh_write_unlock(a->br);
-+ hdir_unlock(hidden_dir, dir, bindex);
-+
-+ out:
-+ atomic_dec(&a->br->br_wh_running);
-+ br_put(a->br);
-+ si_write_unlock(a->sb);
-+ au_mntput(a->sb);
-+ kfree(arg);
-+ if (unlikely(err))
-+ IOErr("err %d\n", err);
-+}
-+
-+static void kick_reinit_br_wh(struct super_block *sb, struct aufs_branch *br)
-+{
-+ int do_dec;
-+ struct reinit_br_wh *arg;
-+
-+ do_dec = 1;
-+ if (atomic_inc_return(&br->br_wh_running) != 1)
-+ goto out;
-+
-+ // ignore ENOMEM
-+ arg = kmalloc(sizeof(*arg), GFP_KERNEL);
-+ if (arg) {
-+ // dec(wh_running), kfree(arg) and br_put() in reinit function
-+ arg->sb = sb;
-+ arg->br = br;
-+ br_get(br);
-+ /* prohibit umount */
-+ au_mntget(sb);
-+ au_wkq_nowait(reinit_br_wh, arg, /*dlgt*/0);
-+ do_dec = 0;
-+ }
-+
-+ out:
-+ if (do_dec)
-+ atomic_dec(&br->br_wh_running);
-+}
-+
-+/*
-+ * create the whiteoute @wh.
-+ */
-+static int link_or_create_wh(struct dentry *wh, struct super_block *sb,
-+ aufs_bindex_t bindex)
-+{
-+ int err, dlgt;
-+ struct aufs_branch *br;
-+ struct dentry *hidden_parent;
-+ struct inode *hidden_dir;
-+
-+ LKTRTrace("%.*s\n", DLNPair(wh));
-+ SiMustReadLock(sb);
-+ hidden_parent = wh->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ dlgt = need_dlgt(sb);
-+ br = stobr(sb, bindex);
-+ br_wh_read_lock(br);
-+ if (br->br_wh) {
-+ err = vfsub_link(br->br_wh, hidden_dir, wh, dlgt);
-+ if (!err || err != -EMLINK)
-+ goto out;
-+
-+ // link count full. re-initialize br_wh.
-+ kick_reinit_br_wh(sb, br);
-+ }
-+
-+ // return this error in this context
-+ err = vfsub_create(hidden_dir, wh, WH_MASK, NULL, dlgt);
-+
-+ out:
-+ br_wh_read_unlock(br);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * create or remove the diropq.
-+ */
-+static struct dentry *do_diropq(struct dentry *dentry, aufs_bindex_t bindex,
-+ int do_create, int dlgt)
-+{
-+ struct dentry *opq_dentry, *hidden_dentry;
-+ struct inode *hidden_dir;
-+ int err;
-+ struct super_block *sb;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, bindex %d, do_create %d\n", DLNPair(dentry),
-+ bindex, do_create);
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ DEBUG_ON(!hidden_dentry);
-+ hidden_dir = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_dir || !S_ISDIR(hidden_dir->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ // already checked by au_test_perm().
-+ sb = dentry->d_sb;
-+ lkup.nfsmnt = au_nfsmnt(sb, bindex);
-+ lkup.dlgt = dlgt;
-+ opq_dentry = lkup_one(diropq_name.name, hidden_dentry, diropq_name.len,
-+ &lkup);
-+ //if (LktrCond) {dput(opq_dentry); opq_dentry = ERR_PTR(-1);}
-+ if (IS_ERR(opq_dentry))
-+ goto out;
-+
-+ if (do_create) {
-+ DEBUG_ON(opq_dentry->d_inode);
-+ err = link_or_create_wh(opq_dentry, sb, bindex);
-+ //if (LktrCond) {vfs_unlink(hidden_dir, opq_dentry); err = -1;}
-+ if (!err) {
-+ set_dbdiropq(dentry, bindex);
-+ goto out; /* success */
-+ }
-+ } else {
-+ DEBUG_ON(/* !S_ISDIR(dentry->d_inode->i_mode)
-+ * || */!opq_dentry->d_inode);
-+ err = vfsub_unlink(hidden_dir, opq_dentry, lkup.dlgt);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ set_dbdiropq(dentry, -1);
-+ }
-+ dput(opq_dentry);
-+ opq_dentry = ERR_PTR(err);
-+
-+ out:
-+ TraceErrPtr(opq_dentry);
-+ return opq_dentry;
-+}
-+
-+struct do_diropq_args {
-+ struct dentry **errp;
-+ struct dentry *dentry;
-+ aufs_bindex_t bindex;
-+ int do_create, dlgt;
-+};
-+
-+static void call_do_diropq(void *args)
-+{
-+ struct do_diropq_args *a = args;
-+ *a->errp = do_diropq(a->dentry, a->bindex, a->do_create, a->dlgt);
-+}
-+
-+struct dentry *sio_diropq(struct dentry *dentry, aufs_bindex_t bindex,
-+ int do_create, int dlgt)
-+{
-+ struct dentry *diropq, *hidden_dentry;
-+
-+ LKTRTrace("%.*s, bindex %d, do_create %d\n",
-+ DLNPair(dentry), bindex, do_create);
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!au_test_perm(hidden_dentry->d_inode, MAY_EXEC | MAY_WRITE, dlgt))
-+ diropq = do_diropq(dentry, bindex, do_create, dlgt);
-+ else {
-+ struct do_diropq_args args = {
-+ .errp = &diropq,
-+ .dentry = dentry,
-+ .bindex = bindex,
-+ .do_create = do_create,
-+ .dlgt = dlgt
-+ };
-+ au_wkq_wait(call_do_diropq, &args, /*dlgt*/0);
-+ }
-+
-+ TraceErrPtr(diropq);
-+ return diropq;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * lookup whiteout dentry.
-+ * @hidden_parent: hidden parent dentry which must exist and be locked
-+ * @base_name: name of dentry which will be whiteouted
-+ * returns dentry for whiteout.
-+ */
-+struct dentry *lkup_wh(struct dentry *hidden_parent, struct qstr *base_name,
-+ struct lkup_args *lkup)
-+{
-+ int err;
-+ struct qstr wh_name;
-+ struct dentry *wh_dentry;
-+
-+ LKTRTrace("%.*s/%.*s\n", DLNPair(hidden_parent), LNPair(base_name));
-+ IMustLock(hidden_parent->d_inode);
-+
-+ err = au_alloc_whname(base_name->name, base_name->len, &wh_name);
-+ //if (LktrCond) {au_free_whname(&wh_name); err = -1;}
-+ wh_dentry = ERR_PTR(err);
-+ if (!err) {
-+ // do not superio.
-+ wh_dentry = lkup_one(wh_name.name, hidden_parent, wh_name.len,
-+ lkup);
-+ au_free_whname(&wh_name);
-+ }
-+ TraceErrPtr(wh_dentry);
-+ return wh_dentry;
-+}
-+
-+/*
-+ * link/create a whiteout for @dentry on @bindex.
-+ */
-+struct dentry *simple_create_wh(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct dentry *hidden_parent,
-+ struct lkup_args *lkup)
-+{
-+ struct dentry *wh_dentry;
-+ int err;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s/%.*s on b%d\n", DLNPair(hidden_parent),
-+ DLNPair(dentry), bindex);
-+
-+ sb = dentry->d_sb;
-+ wh_dentry = lkup_wh(hidden_parent, &dentry->d_name, lkup);
-+ //au_nfsmnt(sb, bindex), need_dlgt(sb));
-+ //if (LktrCond) {dput(wh_dentry); wh_dentry = ERR_PTR(-1);}
-+ if (!IS_ERR(wh_dentry) && !wh_dentry->d_inode) {
-+ IMustLock(hidden_parent->d_inode);
-+ err = link_or_create_wh(wh_dentry, sb, bindex);
-+ if (!err)
-+ set_dbwh(dentry, bindex);
-+ else {
-+ dput(wh_dentry);
-+ wh_dentry = ERR_PTR(err);
-+ }
-+ }
-+
-+ TraceErrPtr(wh_dentry);
-+ return wh_dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* Delete all whiteouts in this directory in branch bindex. */
-+static int del_wh_children(struct aufs_nhash *whlist,
-+ struct dentry *hidden_parent, aufs_bindex_t bindex,
-+ struct lkup_args *lkup)
-+{
-+ int err, i;
-+ struct qstr wh_name;
-+ char *p;
-+ struct inode *hidden_dir;
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos;
-+ struct aufs_destr *str;
-+
-+ LKTRTrace("%.*s\n", DLNPair(hidden_parent));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ DEBUG_ON(IS_RDONLY(hidden_dir));
-+ //SiMustReadLock(??);
-+
-+ err = -ENOMEM;
-+ wh_name.name = p = __getname();
-+ //if (LktrCond) {__putname(p); wh_name.name = p = NULL;}
-+ if (unlikely(!wh_name.name))
-+ goto out;
-+ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN);
-+ p += AUFS_WH_PFX_LEN;
-+
-+ // already checked by au_test_perm().
-+ err = 0;
-+ for (i = 0; !err && i < AUFS_NHASH_SIZE; i++) {
-+ head = whlist->heads + i;
-+ hlist_for_each_entry(tpos, pos, head, wh_hash) {
-+ if (tpos->wh_bindex != bindex)
-+ continue;
-+ str = &tpos->wh_str;
-+ if (str->len + AUFS_WH_PFX_LEN <= PATH_MAX) {
-+ memcpy(p, str->name, str->len);
-+ wh_name.len = AUFS_WH_PFX_LEN + str->len;
-+ err = unlink_wh_name(hidden_parent, &wh_name,
-+ lkup);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ continue;
-+ break;
-+ }
-+ IOErr("whiteout name too long %.*s\n",
-+ str->len, str->name);
-+ err = -EIO;
-+ break;
-+ }
-+ }
-+ __putname(wh_name.name);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct del_wh_children_args {
-+ int *errp;
-+ struct aufs_nhash *whlist;
-+ struct dentry *hidden_parent;
-+ aufs_bindex_t bindex;
-+ struct lkup_args *lkup;
-+};
-+
-+static void call_del_wh_children(void *args)
-+{
-+ struct del_wh_children_args *a = args;
-+ *a->errp = del_wh_children(a->whlist, a->hidden_parent, a->bindex,
-+ a->lkup);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * rmdir the whiteouted temporary named dir @hidden_dentry.
-+ * @whlist: whiteouted children.
-+ */
-+int rmdir_whtmp(struct dentry *hidden_dentry, struct aufs_nhash *whlist,
-+ aufs_bindex_t bindex, struct inode *dir, struct inode *inode)
-+{
-+ int err;
-+ struct inode *hidden_inode, *hidden_dir;
-+ struct lkup_args lkup;
-+ struct super_block *sb;
-+
-+ LKTRTrace("hd %.*s, b%d, i%lu\n",
-+ DLNPair(hidden_dentry), bindex, dir->i_ino);
-+ IMustLock(dir);
-+ IiMustAnyLock(dir);
-+ hidden_dir = hidden_dentry->d_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ sb = inode->i_sb;
-+ lkup.nfsmnt = au_nfsmnt(sb, bindex);
-+ lkup.dlgt = need_dlgt(sb);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(hidden_inode != au_h_iptr_i(inode, bindex));
-+ hdir2_lock(hidden_inode, inode, bindex);
-+ if (!au_test_perm(hidden_inode, MAY_EXEC | MAY_WRITE, lkup.dlgt))
-+ err = del_wh_children(whlist, hidden_dentry, bindex, &lkup);
-+ else {
-+ // ugly
-+ int dlgt = lkup.dlgt;
-+ struct del_wh_children_args args = {
-+ .errp = &err,
-+ .whlist = whlist,
-+ .hidden_parent = hidden_dentry,
-+ .bindex = bindex,
-+ .lkup = &lkup
-+ };
-+
-+ lkup.dlgt = 0;
-+ au_wkq_wait(call_del_wh_children, &args, /*dlgt*/0);
-+ lkup.dlgt = dlgt;
-+ }
-+ hdir_unlock(hidden_inode, inode, bindex);
-+
-+ if (!err) {
-+ err = vfsub_rmdir(hidden_dir, hidden_dentry, lkup.dlgt);
-+ //d_drop(hidden_dentry);
-+ //if (LktrCond) err = -1;
-+ }
-+
-+ if (!err) {
-+ if (ibstart(dir) == bindex) {
-+ au_cpup_attr_timesizes(dir);
-+ //au_cpup_attr_nlink(dir);
-+ dir->i_nlink--;
-+ }
-+ return 0; /* success */
-+ }
-+
-+ Warn("failed removing %.*s(%d), ignored\n",
-+ DLNPair(hidden_dentry), err);
-+ return err;
-+}
-+
-+static void do_rmdir_whtmp(void *arg)
-+{
-+ int err;
-+ struct rmdir_whtmp_arg *a = arg;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, b%d, dir i%lu\n",
-+ DLNPair(a->h_dentry), a->bindex, a->dir->i_ino);
-+
-+ i_lock(a->dir);
-+ sb = a->dir->i_sb;
-+ si_read_lock(sb);
-+ err = test_ro(sb, a->bindex, NULL);
-+ if (!err) {
-+ struct inode *hidden_dir = a->h_dentry->d_parent->d_inode;
-+
-+ ii_write_lock_child(a->inode);
-+ ii_write_lock_parent(a->dir);
-+ hdir_lock(hidden_dir, a->dir, a->bindex);
-+ err = rmdir_whtmp(a->h_dentry, &a->whlist, a->bindex,
-+ a->dir, a->inode);
-+ hdir_unlock(hidden_dir, a->dir, a->bindex);
-+ ii_write_unlock(a->dir);
-+ ii_write_unlock(a->inode);
-+ }
-+ dput(a->h_dentry);
-+ nhash_fin(&a->whlist);
-+ iput(a->inode);
-+ si_read_unlock(sb);
-+ au_mntput(sb);
-+ i_unlock(a->dir);
-+ iput(a->dir);
-+ kfree(arg);
-+ if (unlikely(err))
-+ IOErr("err %d\n", err);
-+}
-+
-+void kick_rmdir_whtmp(struct dentry *hidden_dentry, struct aufs_nhash *whlist,
-+ aufs_bindex_t bindex, struct inode *dir,
-+ struct inode *inode, struct rmdir_whtmp_arg *arg)
-+{
-+ LKTRTrace("%.*s\n", DLNPair(hidden_dentry));
-+ IMustLock(dir);
-+
-+ // all post-process will be done in do_rmdir_whtmp().
-+ arg->h_dentry = dget(hidden_dentry);
-+ nhash_init(&arg->whlist);
-+ nhash_move(&arg->whlist, whlist);
-+ arg->bindex = bindex;
-+ arg->dir = igrab(dir);
-+ arg->inode = igrab(inode);
-+ /* prohibit umount */
-+ au_mntget(dir->i_sb);
-+
-+ au_wkq_nowait(do_rmdir_whtmp, arg, /*dlgt*/0);
-+}
-diff --git a/fs/aufs/whout.h b/fs/aufs/whout.h
-new file mode 100755
-index 0000000..d44c3cd
---- /dev/null
-+++ b/fs/aufs/whout.h
-@@ -0,0 +1,87 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: whout.h,v 1.8 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_WHOUT_H__
-+#define __AUFS_WHOUT_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/aufs_type.h>
-+
-+int au_alloc_whname(const char *name, int len, struct qstr *wh);
-+void au_free_whname(struct qstr *wh);
-+
-+struct lkup_args;
-+int is_wh(struct dentry *h_parent, struct qstr *wh_name, int try_sio,
-+ struct lkup_args *lkup);
-+int is_diropq(struct dentry *h_dentry, struct lkup_args *lkup);
-+
-+struct dentry *lkup_whtmp(struct dentry *h_parent, struct qstr *prefix,
-+ struct lkup_args *lkup);
-+int rename_whtmp(struct dentry *dentry, aufs_bindex_t bindex);
-+int au_unlink_wh_dentry(struct inode *h_dir, struct dentry *wh_dentry,
-+ struct dentry *dentry, int dlgt);
-+
-+struct aufs_branch;
-+int init_wh(struct dentry *h_parent, struct aufs_branch *br,
-+ struct vfsmount *nfsmnt, struct super_block *sb);
-+
-+struct dentry *sio_diropq(struct dentry *dentry, aufs_bindex_t bindex,
-+ int do_create, int dlgt);
-+
-+struct dentry *lkup_wh(struct dentry *h_parent, struct qstr *base_name,
-+ struct lkup_args *lkup);
-+struct dentry *simple_create_wh(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct dentry *h_parent,
-+ struct lkup_args *lkup);
-+
-+/* real rmdir the whiteout-ed dir */
-+struct rmdir_whtmp_arg {
-+ struct dentry *h_dentry;
-+ struct aufs_nhash whlist;
-+ aufs_bindex_t bindex;
-+ struct inode *dir, *inode;
-+};
-+
-+struct aufs_nhash;
-+int rmdir_whtmp(struct dentry *h_dentry, struct aufs_nhash *whlist,
-+ aufs_bindex_t bindex, struct inode *dir, struct inode *inode);
-+void kick_rmdir_whtmp(struct dentry *h_dentry, struct aufs_nhash *whlist,
-+ aufs_bindex_t bindex, struct inode *dir,
-+ struct inode *inode, struct rmdir_whtmp_arg *arg);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+struct dentry *create_diropq(struct dentry *dentry, aufs_bindex_t bindex,
-+ int dlgt)
-+{
-+ return sio_diropq(dentry, bindex, 1, dlgt);
-+}
-+
-+static inline
-+int remove_diropq(struct dentry *dentry, aufs_bindex_t bindex, int dlgt)
-+{
-+ return PTR_ERR(sio_diropq(dentry, bindex, 0, dlgt));
-+}
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_WHOUT_H__ */
-diff --git a/fs/aufs/wkq.c b/fs/aufs/wkq.c
-new file mode 100755
-index 0000000..b5ab023
---- /dev/null
-+++ b/fs/aufs/wkq.c
-@@ -0,0 +1,283 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: wkq.c,v 1.14 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+#include <linux/module.h>
-+#include "aufs.h"
-+
-+struct au_wkq *au_wkq;
-+
-+struct au_cred {
-+#ifdef CONFIG_AUFS_DLGT
-+ uid_t fsuid;
-+ gid_t fsgid;
-+ kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
-+ //unsigned keep_capabilities:1;
-+ //struct user_struct *user;
-+ //struct fs_struct *fs;
-+ //struct nsproxy *nsproxy;
-+#endif
-+};
-+
-+struct au_wkinfo {
-+ struct work_struct wk;
-+
-+ unsigned int wait:1;
-+ unsigned int dlgt:1;
-+ struct au_cred cred;
-+
-+ au_wkq_func_t func;
-+ void *args;
-+
-+ atomic_t *busyp;
-+ struct completion *comp;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DLGT
-+static void cred_store(struct au_cred *cred)
-+{
-+ cred->fsuid = current->fsuid;
-+ cred->fsgid = current->fsgid;
-+ cred->cap_effective = current->cap_effective;
-+ cred->cap_inheritable = current->cap_inheritable;
-+ cred->cap_permitted = current->cap_permitted;
-+}
-+
-+static void cred_revert(struct au_cred *cred)
-+{
-+ DEBUG_ON(!is_au_wkq(current));
-+ current->fsuid = cred->fsuid;
-+ current->fsgid = cred->fsgid;
-+ current->cap_effective = cred->cap_effective;
-+ current->cap_inheritable = cred->cap_inheritable;
-+ current->cap_permitted = cred->cap_permitted;
-+}
-+
-+static void cred_switch(struct au_cred *old, struct au_cred *new)
-+{
-+ cred_store(old);
-+ cred_revert(new);
-+}
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void update_busy(struct au_wkq *wkq, struct au_wkinfo *wkinfo)
-+{
-+#ifdef CONFIG_AUFS_SYSAUFS
-+ unsigned int new, old;
-+
-+ do {
-+ new = atomic_read(wkinfo->busyp);
-+ old = wkq->max_busy;
-+ if (new <= old)
-+ break;
-+ } while (cmpxchg(&wkq->max_busy, old, new) == old);
-+#endif
-+}
-+
-+static int enqueue(struct au_wkq *wkq, struct au_wkinfo *wkinfo)
-+{
-+ wkinfo->busyp = &wkq->busy;
-+ update_busy(wkq, wkinfo);
-+ if (wkinfo->wait)
-+ return !queue_work(wkq->q, &wkinfo->wk);
-+ else
-+ return !schedule_work(&wkinfo->wk);
-+}
-+
-+static void do_wkq(struct au_wkinfo *wkinfo)
-+{
-+ unsigned int idle, n;
-+ int i, idle_idx;
-+
-+ TraceEnter();
-+
-+ while (1) {
-+ if (wkinfo->wait) {
-+ idle_idx = 0;
-+ idle = UINT_MAX;
-+ for (i = 0; i < aufs_nwkq; i++) {
-+ n = atomic_inc_return(&au_wkq[i].busy);
-+ if (n == 1 && !enqueue(au_wkq + i, wkinfo))
-+ return; /* success */
-+
-+ if (n < idle) {
-+ idle_idx = i;
-+ idle = n;
-+ }
-+ atomic_dec(&au_wkq[i].busy);
-+ }
-+ } else
-+ idle_idx = aufs_nwkq;
-+
-+ atomic_inc(&au_wkq[idle_idx].busy);
-+ if (!enqueue(au_wkq + idle_idx, wkinfo))
-+ return; /* success */
-+
-+ /* impossible? */
-+ Warn1("failed to queue_work()\n");
-+ yield();
-+ }
-+}
-+
-+static AuWkqFunc(wkq_func, wk)
-+{
-+ struct au_wkinfo *wkinfo = container_of(wk, struct au_wkinfo, wk);
-+
-+ LKTRTrace("wkinfo{%u, %u, %p, %p, %p}\n",
-+ wkinfo->wait, wkinfo->dlgt, wkinfo->func, wkinfo->busyp,
-+ wkinfo->comp);
-+#ifdef CONFIG_AUFS_DLGT
-+ if (!wkinfo->dlgt)
-+ wkinfo->func(wkinfo->args);
-+ else {
-+ struct au_cred cred;
-+ cred_switch(&cred, &wkinfo->cred);
-+ wkinfo->func(wkinfo->args);
-+ cred_revert(&cred);
-+ }
-+#else
-+ wkinfo->func(wkinfo->args);
-+#endif
-+ atomic_dec(wkinfo->busyp);
-+ if (wkinfo->wait)
-+ complete(wkinfo->comp);
-+ else {
-+ kfree(wkinfo);
-+ module_put(THIS_MODULE);
-+ }
-+}
-+
-+void au_wkq_run(au_wkq_func_t func, void *args, int dlgt, int do_wait)
-+{
-+ DECLARE_COMPLETION_ONSTACK(comp);
-+ struct au_wkinfo _wkinfo = {
-+ .wait = 1,
-+ .dlgt = !!dlgt,
-+ .func = func,
-+ .args = args,
-+ .comp = &comp
-+ }, *wkinfo = &_wkinfo;
-+
-+ LKTRTrace("dlgt %d, do_wait %d\n", dlgt, do_wait);
-+ DEBUG_ON(is_au_wkq(current));
-+
-+ if (unlikely(!do_wait)) {
-+ static DECLARE_WAIT_QUEUE_HEAD(wq);
-+ /*
-+ * never fail.
-+ * wkq_func() must free this wkinfo.
-+ * it highly depends upon the implementation of workqueue.
-+ */
-+ wait_event(wq, (wkinfo = kmalloc(sizeof(*wkinfo), GFP_KERNEL)));
-+ wkinfo->wait = 0;
-+ wkinfo->dlgt = !!dlgt;
-+ wkinfo->func = func;
-+ wkinfo->args = args;
-+ wkinfo->comp = NULL;
-+ __module_get(THIS_MODULE);
-+ }
-+
-+ AuInitWkq(&wkinfo->wk, wkq_func);
-+#ifdef CONFIG_AUFS_DLGT
-+ if (dlgt)
-+ cred_store(&wkinfo->cred);
-+#endif
-+ do_wkq(wkinfo);
-+ if (do_wait)
-+ wait_for_completion(wkinfo->comp);
-+}
-+
-+#if 0
-+void au_wkq_wait_nwtask(void)
-+{
-+ static DECLARE_WAIT_QUEUE_HEAD(wq);
-+ wait_event(wq, !atomic_read(&au_wkq[aufs_nwkq].busy));
-+}
-+#endif
-+
-+void au_wkq_fin(void)
-+{
-+ int i;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < aufs_nwkq; i++)
-+ if (au_wkq[i].q && !IS_ERR(au_wkq[i].q))
-+ destroy_workqueue(au_wkq[i].q);
-+ kfree(au_wkq);
-+}
-+
-+int __init au_wkq_init(void)
-+{
-+ int err, i;
-+ struct au_wkq *nowaitq;
-+
-+ LKTRTrace("%d\n", aufs_nwkq);
-+
-+ /* '+1' is for accounting of nowait queue */
-+ err = -ENOMEM;
-+ au_wkq = kcalloc(aufs_nwkq + 1, sizeof(*au_wkq), GFP_KERNEL);
-+ if (unlikely(!au_wkq))
-+ goto out;
-+
-+ err = 0;
-+ for (i = 0; i < aufs_nwkq; i++) {
-+ au_wkq[i].q = create_singlethread_workqueue(AUFS_WKQ_NAME);
-+ if (au_wkq[i].q && !IS_ERR(au_wkq[i].q)) {
-+ atomic_set(&au_wkq[i].busy, 0);
-+ au_wkq[i].max_busy = 0;
-+ continue;
-+ }
-+
-+ err = PTR_ERR(au_wkq[i].q);
-+ au_wkq_fin();
-+ break;
-+ }
-+
-+ /* nowait accounting */
-+ nowaitq = au_wkq + aufs_nwkq;
-+ atomic_set(&nowaitq->busy, 0);
-+ nowaitq->max_busy = 0;
-+ nowaitq->q = NULL;
-+
-+#if 0 // test accouting
-+ if (!err) {
-+ static void f(void *args) {
-+ DbgSleep(1);
-+ }
-+ int i;
-+ //au_debug_on();
-+ LKTRTrace("f %p\n", f);
-+ for (i = 0; i < 10; i++)
-+ au_wkq_nowait(f, NULL, 0);
-+ for (i = 0; i < aufs_nwkq; i++)
-+ au_wkq_wait(f, NULL, 0);
-+ DbgSleep(11);
-+ //au_debug_off();
-+ }
-+#endif
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-diff --git a/fs/aufs/wkq.h b/fs/aufs/wkq.h
-new file mode 100755
-index 0000000..cc1bb25
---- /dev/null
-+++ b/fs/aufs/wkq.h
-@@ -0,0 +1,81 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: wkq.h,v 1.9 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+#ifndef __AUFS_WKQ_H__
-+#define __AUFS_WKQ_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/sched.h>
-+#include <linux/version.h>
-+#include <linux/workqueue.h>
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* internal workqueue named AUFS_WKQ_NAME */
-+struct au_wkq {
-+ struct workqueue_struct *q;
-+
-+ /* accounting */
-+ atomic_t busy;
-+ unsigned int max_busy;
-+} ;//__attribute__ ((aligned));
-+
-+typedef void (*au_wkq_func_t)(void *args);
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
-+#define AuInitWkq(wk, func) INIT_WORK(wk, func)
-+#define AuWkqFunc(name, arg) void name(struct work_struct *arg)
-+#else
-+typedef void (*work_func_t)(void *arg);
-+#define AuInitWkq(wk, func) INIT_WORK(wk, func, wk)
-+#define AuWkqFunc(name, arg) void name(void *arg)
-+#endif
-+
-+extern struct au_wkq *au_wkq;
-+
-+void au_wkq_run(au_wkq_func_t func, void *args, int dlgt, int do_wait);
-+//void au_wkq_wait_nwtask(void);
-+int __init au_wkq_init(void);
-+void au_wkq_fin(void);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline int is_au_wkq(struct task_struct *tsk)
-+{
-+ return (!tsk->mm && !strcmp(current->comm, AUFS_WKQ_NAME));
-+}
-+
-+static inline void au_wkq_wait(au_wkq_func_t func, void *args, int dlgt)
-+{
-+ au_wkq_run(func, args, dlgt, /*do_wait*/1);
-+}
-+
-+static inline void au_wkq_nowait(au_wkq_func_t func, void *args, int dlgt)
-+{
-+ au_wkq_run(func, args, dlgt, /*do_wait*/0);
-+}
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_WKQ_H__ */
-diff --git a/fs/aufs/xino.c b/fs/aufs/xino.c
-new file mode 100755
-index 0000000..145491e
---- /dev/null
-+++ b/fs/aufs/xino.c
-@@ -0,0 +1,644 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: xino.c,v 1.27 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+#include <linux/fsnotify.h>
-+#include <asm/uaccess.h>
-+#include "aufs.h"
-+
-+static readf_t find_readf(struct file *h_file)
-+{
-+ const struct file_operations *fop = h_file->f_op;
-+
-+ if (fop) {
-+ if (fop->read)
-+ return fop->read;
-+ if (fop->aio_read)
-+ return do_sync_read;
-+ }
-+ return ERR_PTR(-ENOSYS);
-+}
-+
-+static writef_t find_writef(struct file *h_file)
-+{
-+ const struct file_operations *fop = h_file->f_op;
-+
-+ if (fop) {
-+ if (fop->write)
-+ return fop->write;
-+ if (fop->aio_write)
-+ return do_sync_write;
-+ }
-+ return ERR_PTR(-ENOSYS);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static ssize_t xino_fread(readf_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
-+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+
-+ LKTRTrace("%.*s, sz %lu, *pos %Ld\n",
-+ DLNPair(file->f_dentry), (unsigned long)size, *pos);
-+
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ do {
-+ err = func(file, (char __user*)buf, size, pos);
-+ } while (err == -EAGAIN || err == -EINTR);
-+ set_fs(oldfs);
-+
-+#if 0
-+ if (err > 0)
-+ fsnotify_access(file->f_dentry);
-+#endif
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static ssize_t do_xino_fwrite(writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
-+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+
-+ lockdep_off();
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ do {
-+ err = func(file, (const char __user*)buf, size, pos);
-+ } while (err == -EAGAIN || err == -EINTR);
-+ set_fs(oldfs);
-+ lockdep_on();
-+
-+#if 0
-+ if (err > 0)
-+ fsnotify_modify(file->f_dentry);
-+#endif
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct do_xino_fwrite_args {
-+ ssize_t *errp;
-+ writef_t func;
-+ struct file *file;
-+ void *buf;
-+ size_t size;
-+ loff_t *pos;
-+};
-+
-+static void call_do_xino_fwrite(void *args)
-+{
-+ struct do_xino_fwrite_args *a = args;
-+ *a->errp = do_xino_fwrite(a->func, a->file, a->buf, a->size, a->pos);
-+}
-+
-+static ssize_t xino_fwrite(writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
-+{
-+ ssize_t err;
-+
-+ LKTRTrace("%.*s, sz %lu, *pos %Ld\n",
-+ DLNPair(file->f_dentry), (unsigned long)size, *pos);
-+
-+ // signal block and no wkq?
-+ /*
-+ * it breaks RLIMIT_FSIZE and normal user's limit,
-+ * users should care about quota and real 'filesystem full.'
-+ */
-+ if (!is_au_wkq(current)) {
-+ struct do_xino_fwrite_args args = {
-+ .errp = &err,
-+ .func = func,
-+ .file = file,
-+ .buf = buf,
-+ .size = size,
-+ .pos = pos
-+ };
-+ au_wkq_wait(call_do_xino_fwrite, &args, /*dlgt*/0);
-+ } else
-+ err = do_xino_fwrite(func, file, buf, size, pos);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * write @ino to the xinofile for the specified branch{@sb, @bindex}
-+ * at the position of @_ino.
-+ * when @ino is zero, it is written to the xinofile and means no entry.
-+ */
-+int xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ struct xino *xino)
-+{
-+ struct aufs_branch *br;
-+ loff_t pos;
-+ ssize_t sz;
-+
-+ LKTRTrace("b%d, hi%lu, i%lu\n", bindex, h_ino, xino->ino);
-+ //DEBUG_ON(!xino->ino /* || !xino->h_gen */);
-+ //WARN_ON(bindex == 0 && h_ino == 31);
-+
-+ if (unlikely(!au_flag_test(sb, AuFlag_XINO)))
-+ return 0;
-+
-+ br = stobr(sb, bindex);
-+ DEBUG_ON(!br || !br->br_xino);
-+ pos = h_ino * sizeof(*xino);
-+ sz = xino_fwrite(br->br_xino_write, br->br_xino, xino, sizeof(*xino),
-+ &pos);
-+ //if (LktrCond) sz = 1;
-+ if (sz == sizeof(*xino))
-+ return 0; /* success */
-+
-+ IOErr("write failed (%ld)\n", (long)sz);
-+ return -EIO;
-+}
-+
-+int xino_write0(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino)
-+{
-+ struct xino xino = {
-+ .ino = 0
-+ };
-+ return xino_write(sb, bindex, h_ino, &xino);
-+}
-+
-+// why is not atomic_long_inc_return defined?
-+static DEFINE_SPINLOCK(alir_lock);
-+static long atomic_long_inc_return(atomic_long_t *a)
-+{
-+ long l;
-+
-+ spin_lock(&alir_lock);
-+ atomic_long_inc(a);
-+ l = atomic_long_read(a);
-+ spin_unlock(&alir_lock);
-+ return l;
-+}
-+
-+ino_t xino_new_ino(struct super_block *sb)
-+{
-+ ino_t ino;
-+
-+ TraceEnter();
-+ ino = atomic_long_inc_return(&stosi(sb)->si_xino);
-+ BUILD_BUG_ON(AUFS_FIRST_INO < AUFS_ROOT_INO);
-+ if (ino >= AUFS_ROOT_INO)
-+ return ino;
-+ else {
-+ atomic_long_dec(&stosi(sb)->si_xino);
-+ IOErr1("inode number overflow\n");
-+ return 0;
-+ }
-+}
-+
-+/*
-+ * read @ino from xinofile for the specified branch{@sb, @bindex}
-+ * at the position of @h_ino.
-+ * if @ino does not exist and @do_new is true, get new one.
-+ */
-+int xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ struct xino *xino)
-+{
-+ int err;
-+ struct aufs_branch *br;
-+ struct file *file;
-+ loff_t pos;
-+ ssize_t sz;
-+
-+ LKTRTrace("b%d, hi%lu\n", bindex, h_ino);
-+
-+ err = 0;
-+ xino->ino = 0;
-+ if (unlikely(!au_flag_test(sb, AuFlag_XINO)))
-+ return 0; /* no ino */
-+
-+ br = stobr(sb, bindex);
-+ file = br->br_xino;
-+ DEBUG_ON(!file);
-+ pos = h_ino * sizeof(*xino);
-+ if (i_size_read(file->f_dentry->d_inode) < pos + sizeof(*xino))
-+ return 0; /* no ino */
-+
-+ sz = xino_fread(br->br_xino_read, file, xino, sizeof(*xino), &pos);
-+ if (sz == sizeof(*xino))
-+ return 0; /* success */
-+
-+ err = sz;
-+ if (unlikely(sz >= 0)) {
-+ err = -EIO;
-+ IOErr("xino read error (%ld)\n", (long)sz);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct file *xino_create(struct super_block *sb, char *fname, int silent,
-+ struct dentry *parent)
-+{
-+ struct file *file;
-+ int err;
-+ struct dentry *hidden_parent;
-+ struct inode *hidden_dir;
-+ //const int udba = au_flag_test(sb, AuFlag_UDBA_INOTIFY);
-+
-+ LKTRTrace("%s\n", fname);
-+ //DEBUG_ON(!au_flag_test(sb, AuFlag_XINO));
-+
-+ // LSM may detect it
-+ // use sio?
-+ file = vfsub_filp_open(fname, O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE,
-+ S_IRUGO | S_IWUGO);
-+ //file = ERR_PTR(-1);
-+ if (IS_ERR(file)) {
-+ if (!silent)
-+ Err("open %s(%ld)\n", fname, PTR_ERR(file));
-+ return file;
-+ }
-+#if 0
-+ if (unlikely(udba && parent))
-+ au_direval_dec(parent);
-+#endif
-+
-+ /* keep file count */
-+ hidden_parent = dget_parent(file->f_dentry);
-+ hidden_dir = hidden_parent->d_inode;
-+ hi_lock_parent(hidden_dir);
-+ err = vfsub_unlink(hidden_dir, file->f_dentry, /*dlgt*/0);
-+#if 0
-+ if (unlikely(!err && udba && parent))
-+ au_direval_dec(parent);
-+#endif
-+ i_unlock(hidden_dir);
-+ dput(hidden_parent);
-+ if (unlikely(err)) {
-+ if (!silent)
-+ Err("unlink %s(%d)\n", fname, err);
-+ goto out;
-+ }
-+ if (sb != file->f_dentry->d_sb)
-+ return file; /* success */
-+
-+ if (!silent)
-+ Err("%s must be outside\n", fname);
-+ err = -EINVAL;
-+
-+ out:
-+ fput(file);
-+ file = ERR_PTR(err);
-+ return file;
-+}
-+
-+/*
-+ * find another branch who is on the same filesystem of the specified
-+ * branch{@btgt}. search until @bend.
-+ */
-+static int is_sb_shared(struct super_block *sb, aufs_bindex_t btgt,
-+ aufs_bindex_t bend)
-+{
-+ aufs_bindex_t bindex;
-+ struct super_block *tgt_sb = sbr_sb(sb, btgt);
-+
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (unlikely(btgt != bindex && tgt_sb == sbr_sb(sb, bindex)))
-+ return bindex;
-+ return -1;
-+}
-+
-+/*
-+ * create a new xinofile at the same place/path as @base_file.
-+ */
-+static struct file *xino_create2(struct file *base_file)
-+{
-+ struct file *file;
-+ int err;
-+ struct dentry *base, *dentry, *parent;
-+ struct inode *dir;
-+ struct qstr *name;
-+ struct lkup_args lkup = {
-+ .nfsmnt = NULL,
-+ .dlgt = 0
-+ };
-+
-+ base = base_file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(base));
-+ parent = dget_parent(base);
-+ dir = parent->d_inode;
-+ IMustLock(dir);
-+
-+ file = ERR_PTR(-EINVAL);
-+ if (unlikely(au_is_nfs(parent->d_sb)))
-+ goto out;
-+
-+ // do not superio, nor NFS.
-+ name = &base->d_name;
-+ dentry = lkup_one(name->name, parent, name->len, &lkup);
-+ //if (LktrCond) {dput(dentry); dentry = ERR_PTR(-1);}
-+ if (IS_ERR(dentry)) {
-+ file = (void*)dentry;
-+ Err("%.*s lookup err %ld\n", LNPair(name), PTR_ERR(dentry));
-+ goto out;
-+ }
-+ err = vfsub_create(dir, dentry, S_IRUGO | S_IWUGO, NULL, /*dlgt*/0);
-+ //if (LktrCond) {vfs_unlink(dir, dentry); err = -1;}
-+ if (unlikely(err)) {
-+ file = ERR_PTR(err);
-+ Err("%.*s create err %d\n", LNPair(name), err);
-+ goto out_dput;
-+ }
-+ file = dentry_open(dget(dentry), mntget(base_file->f_vfsmnt),
-+ O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ if (IS_ERR(file)) {
-+ Err("%.*s open err %ld\n", LNPair(name), PTR_ERR(file));
-+ goto out_dput;
-+ }
-+ err = vfsub_unlink(dir, dentry, /*dlgt*/0);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ goto out_dput; /* success */
-+
-+ Err("%.*s unlink err %d\n", LNPair(name), err);
-+ fput(file);
-+ file = ERR_PTR(err);
-+
-+ out_dput:
-+ dput(dentry);
-+ out:
-+ dput(parent);
-+ TraceErrPtr(file);
-+ return file;
-+}
-+
-+/*
-+ * initialize the xinofile for the specified branch{@sb, @bindex}
-+ * at the place/path where @base_file indicates.
-+ * test whether another branch is on the same filesystem or not,
-+ * if @do_test is true.
-+ */
-+int xino_init(struct super_block *sb, aufs_bindex_t bindex,
-+ struct file *base_file, int do_test)
-+{
-+ int err;
-+ struct aufs_branch *br;
-+ aufs_bindex_t bshared, bend;
-+ struct file *file;
-+ struct inode *inode, *hidden_inode;
-+ struct xino xino;
-+
-+ LKTRTrace("b%d, base_file %p, do_test %d\n",
-+ bindex, base_file, do_test);
-+ SiMustWriteLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_XINO));
-+ br = stobr(sb, bindex);
-+ DEBUG_ON(br->br_xino);
-+
-+ file = NULL;
-+ bshared = -1;
-+ bend = sbend(sb);
-+ if (do_test)
-+ bshared = is_sb_shared(sb, bindex, bend);
-+ if (unlikely(bshared >= 0)) {
-+ struct aufs_branch *shared_br = stobr(sb, bshared);
-+ if (shared_br->br_xino) {
-+ file = shared_br->br_xino;
-+ get_file(file);
-+ }
-+ }
-+
-+ if (!file) {
-+ struct dentry *parent = dget_parent(base_file->f_dentry);
-+ struct inode *dir = parent->d_inode;
-+
-+ hi_lock_parent(dir);
-+ file = xino_create2(base_file);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ i_unlock(dir);
-+ dput(parent);
-+ err = PTR_ERR(file);
-+ if (IS_ERR(file))
-+ goto out;
-+ }
-+ br->br_xino_read = find_readf(file);
-+ err = PTR_ERR(br->br_xino_read);
-+ if (IS_ERR(br->br_xino_read))
-+ goto out_put;
-+ br->br_xino_write = find_writef(file);
-+ err = PTR_ERR(br->br_xino_write);
-+ if (IS_ERR(br->br_xino_write))
-+ goto out_put;
-+ br->br_xino = file;
-+
-+ inode = sb->s_root->d_inode;
-+ hidden_inode = au_h_iptr_i(inode, bindex);
-+ xino.ino = inode->i_ino;
-+ //xino.h_gen = hidden_inode->i_generation;
-+ //WARN_ON(xino.h_gen == AuXino_INVALID_HGEN);
-+ err = xino_write(sb, bindex, hidden_inode->i_ino, &xino);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ return 0; /* success */
-+
-+ br->br_xino = NULL;
-+
-+ out_put:
-+ fput(file);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * set xino mount option.
-+ */
-+int xino_set(struct super_block *sb, struct opt_xino *xino, int remount)
-+{
-+ int err, sparse;
-+ aufs_bindex_t bindex, bend;
-+ struct aufs_branch *br;
-+ struct dentry *parent;
-+ struct qstr *name;
-+ struct file *cur_xino;
-+ struct inode *dir;
-+
-+ LKTRTrace("%s\n", xino->path);
-+
-+ err = 0;
-+ name = &xino->file->f_dentry->d_name;
-+ parent = dget_parent(xino->file->f_dentry);
-+ dir = parent->d_inode;
-+ cur_xino = stobr(sb, 0)->br_xino;
-+ if (remount
-+ && cur_xino
-+ && cur_xino->f_dentry->d_parent == parent
-+ && name->len == cur_xino->f_dentry->d_name.len
-+ && !memcmp(name->name, cur_xino->f_dentry->d_name.name, name->len))
-+ goto out;
-+
-+ au_flag_set(sb, AuFlag_XINO);
-+ bend = sbend(sb);
-+ for (bindex = bend; bindex >= 0; bindex--) {
-+ br = stobr(sb, bindex);
-+ if (unlikely(br->br_xino && file_count(br->br_xino) > 1)) {
-+ fput(br->br_xino);
-+ br->br_xino = NULL;
-+ }
-+ }
-+
-+ for (bindex = 0; bindex <= bend; bindex++) {
-+ struct file *file;
-+ struct inode *inode;
-+
-+ br = stobr(sb, bindex);
-+ if (unlikely(!br->br_xino))
-+ continue;
-+
-+ DEBUG_ON(file_count(br->br_xino) != 1);
-+ hi_lock_parent(dir);
-+ file = xino_create2(xino->file);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ err = PTR_ERR(file);
-+ if (IS_ERR(file)) {
-+ i_unlock(dir);
-+ break;
-+ }
-+ inode = br->br_xino->f_dentry->d_inode;
-+ err = au_copy_file(file, br->br_xino, i_size_read(inode), sb,
-+ &sparse);
-+ //if (LktrCond) err = -1;
-+ i_unlock(dir);
-+ if (unlikely(err)) {
-+ fput(file);
-+ break;
-+ }
-+ fput(br->br_xino);
-+ br->br_xino = file;
-+ br->br_xino_read = find_readf(file);
-+ DEBUG_ON(IS_ERR(br->br_xino_read));
-+ br->br_xino_write = find_writef(file);
-+ DEBUG_ON(IS_ERR(br->br_xino_write));
-+ }
-+
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (unlikely(!stobr(sb, bindex)->br_xino)) {
-+ err = xino_init(sb, bindex, xino->file, /*do_test*/1);
-+ //if (LktrCond) {fput(stobr(sb, bindex)->br_xino);
-+ //stobr(sb, bindex)->br_xino = NULL; err = -1;}
-+ if (!err)
-+ continue;
-+ IOErr("creating xino for branch %d(%d), "
-+ "forcing noxino\n", bindex, err);
-+ err = -EIO;
-+ break;
-+ }
-+ out:
-+ dput(parent);
-+ if (!err)
-+ au_flag_set(sb, AuFlag_XINO);
-+ else
-+ au_flag_clr(sb, AuFlag_XINO);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * clear xino mount option
-+ */
-+int xino_clr(struct super_block *sb)
-+{
-+ aufs_bindex_t bindex, bend;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+
-+ bend = sbend(sb);
-+ for (bindex = 0; bindex <= bend; bindex++) {
-+ struct aufs_branch *br;
-+ br = stobr(sb, bindex);
-+ if (br->br_xino) {
-+ fput(br->br_xino);
-+ br->br_xino = NULL;
-+ }
-+ }
-+
-+ //todo: need to make iunique() to return the larger inode number
-+
-+ au_flag_clr(sb, AuFlag_XINO);
-+ return 0;
-+}
-+
-+/*
-+ * create a xinofile at the default place/path.
-+ */
-+struct file *xino_def(struct super_block *sb)
-+{
-+ struct file *file;
-+ aufs_bindex_t bend, bindex, bwr;
-+ char *page, *p;
-+
-+ bend = sbend(sb);
-+ bwr = -1;
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (br_writable(sbr_perm(sb, bindex))
-+ && !au_is_nfs(au_h_dptr_i(sb->s_root, bindex)->d_sb)) {
-+ bwr = bindex;
-+ break;
-+ }
-+
-+ if (bwr != -1) {
-+ // todo: rewrite with lkup_one()
-+ file = ERR_PTR(-ENOMEM);
-+ page = __getname();
-+ //if (LktrCond) {__putname(page); page = NULL;}
-+ if (unlikely(!page))
-+ goto out;
-+ p = d_path(au_h_dptr_i(sb->s_root, bwr), sbr_mnt(sb, bwr), page,
-+ PATH_MAX - sizeof(AUFS_XINO_FNAME));
-+ //if (LktrCond) p = ERR_PTR(-1);
-+ file = (void*)p;
-+ if (p && !IS_ERR(p)) {
-+ strcat(p, "/" AUFS_XINO_FNAME);
-+ LKTRTrace("%s\n", p);
-+ file = xino_create(sb, p, /*silent*/0, sb->s_root);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ }
-+ __putname(page);
-+ } else {
-+ file = xino_create(sb, AUFS_XINO_DEFPATH, /*silent*/0,
-+ /*parent*/NULL);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ }
-+
-+ out:
-+ TraceErrPtr(file);
-+ return file;
-+}
-diff --git a/fs/squashfs/Makefile b/fs/squashfs/Makefile
-new file mode 100644
-index 0000000..1bc7b06
---- /dev/null
-+++ b/fs/squashfs/Makefile
-@@ -0,0 +1,7 @@
-+#
-+# Makefile for the linux squashfs routines.
-+#
-+
-+obj-$(CONFIG_SQUASHFS) += squashfs.o
-+squashfs-y += inode.o
-+squashfs-y += squashfs2_0.o
-diff --git a/fs/squashfs/inode.c b/fs/squashfs/inode.c
-new file mode 100644
-index 0000000..895b699
---- /dev/null
-+++ b/fs/squashfs/inode.c
-@@ -0,0 +1,2329 @@
-+/*
-+ * Squashfs - a compressed read only filesystem for Linux
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * inode.c
-+ */
-+
-+#include <linux/squashfs_fs.h>
-+#include <linux/module.h>
-+#include <linux/zlib.h>
-+#include <linux/fs.h>
-+#include <linux/squashfs_fs_sb.h>
-+#include <linux/squashfs_fs_i.h>
-+#include <linux/buffer_head.h>
-+#include <linux/vfs.h>
-+#include <linux/vmalloc.h>
-+#include <linux/smp_lock.h>
-+
-+#include "squashfs.h"
-+
-+static void vfs_read_inode(struct inode *i);
-+static struct dentry *squashfs_get_parent(struct dentry *child);
-+static int squashfs_read_inode(struct inode *i, squashfs_inode_t inode);
-+static int squashfs_statfs(struct dentry *, struct kstatfs *);
-+static int squashfs_symlink_readpage(struct file *file, struct page *page);
-+static long long read_blocklist(struct inode *inode, int index,
-+ int readahead_blks, char *block_list,
-+ unsigned short **block_p, unsigned int *bsize);
-+static int squashfs_readpage(struct file *file, struct page *page);
-+static int squashfs_readpage4K(struct file *file, struct page *page);
-+static int squashfs_readdir(struct file *, void *, filldir_t);
-+static struct dentry *squashfs_lookup(struct inode *, struct dentry *,
-+ struct nameidata *);
-+static int squashfs_remount(struct super_block *s, int *flags, char *data);
-+static void squashfs_put_super(struct super_block *);
-+static int squashfs_get_sb(struct file_system_type *,int, const char *, void *,
-+ struct vfsmount *);
-+static struct inode *squashfs_alloc_inode(struct super_block *sb);
-+static void squashfs_destroy_inode(struct inode *inode);
-+static int init_inodecache(void);
-+static void destroy_inodecache(void);
-+
-+static struct file_system_type squashfs_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "squashfs",
-+ .get_sb = squashfs_get_sb,
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV
-+};
-+
-+static const unsigned char squashfs_filetype_table[] = {
-+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
-+};
-+
-+static struct super_operations squashfs_super_ops = {
-+ .alloc_inode = squashfs_alloc_inode,
-+ .destroy_inode = squashfs_destroy_inode,
-+ .statfs = squashfs_statfs,
-+ .put_super = squashfs_put_super,
-+ .remount_fs = squashfs_remount
-+};
-+
-+static struct super_operations squashfs_export_super_ops = {
-+ .alloc_inode = squashfs_alloc_inode,
-+ .destroy_inode = squashfs_destroy_inode,
-+ .statfs = squashfs_statfs,
-+ .put_super = squashfs_put_super,
-+ .read_inode = vfs_read_inode
-+};
-+
-+static struct export_operations squashfs_export_ops = {
-+ .get_parent = squashfs_get_parent
-+};
-+
-+SQSH_EXTERN const struct address_space_operations squashfs_symlink_aops = {
-+ .readpage = squashfs_symlink_readpage
-+};
-+
-+SQSH_EXTERN const struct address_space_operations squashfs_aops = {
-+ .readpage = squashfs_readpage
-+};
-+
-+SQSH_EXTERN const struct address_space_operations squashfs_aops_4K = {
-+ .readpage = squashfs_readpage4K
-+};
-+
-+static const struct file_operations squashfs_dir_ops = {
-+ .read = generic_read_dir,
-+ .readdir = squashfs_readdir
-+};
-+
-+SQSH_EXTERN struct inode_operations squashfs_dir_inode_ops = {
-+ .lookup = squashfs_lookup
-+};
-+
-+
-+static struct buffer_head *get_block_length(struct super_block *s,
-+ int *cur_index, int *offset, int *c_byte)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ unsigned short temp;
-+ struct buffer_head *bh;
-+
-+ if (!(bh = sb_bread(s, *cur_index)))
-+ goto out;
-+
-+ if (msblk->devblksize - *offset == 1) {
-+ if (msblk->swap)
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ else
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ brelse(bh);
-+ if (!(bh = sb_bread(s, ++(*cur_index))))
-+ goto out;
-+ if (msblk->swap)
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ bh->b_data);
-+ else
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ bh->b_data);
-+ *c_byte = temp;
-+ *offset = 1;
-+ } else {
-+ if (msblk->swap) {
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ (bh->b_data + *offset + 1));
-+ } else {
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ (bh->b_data + *offset + 1));
-+ }
-+ *c_byte = temp;
-+ *offset += 2;
-+ }
-+
-+ if (SQUASHFS_CHECK_DATA(msblk->sblk.flags)) {
-+ if (*offset == msblk->devblksize) {
-+ brelse(bh);
-+ if (!(bh = sb_bread(s, ++(*cur_index))))
-+ goto out;
-+ *offset = 0;
-+ }
-+ if (*((unsigned char *) (bh->b_data + *offset)) !=
-+ SQUASHFS_MARKER_BYTE) {
-+ ERROR("Metadata block marker corrupt @ %x\n",
-+ *cur_index);
-+ brelse(bh);
-+ goto out;
-+ }
-+ (*offset)++;
-+ }
-+ return bh;
-+
-+out:
-+ return NULL;
-+}
-+
-+
-+SQSH_EXTERN unsigned int squashfs_read_data(struct super_block *s, char *buffer,
-+ long long index, unsigned int length,
-+ long long *next_index, int srclength)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ struct buffer_head *bh[((SQUASHFS_FILE_MAX_SIZE - 1) >>
-+ msblk->devblksize_log2) + 2];
-+ unsigned int offset = index & ((1 << msblk->devblksize_log2) - 1);
-+ unsigned int cur_index = index >> msblk->devblksize_log2;
-+ int bytes, avail_bytes, b = 0, k = 0;
-+ unsigned int compressed;
-+ unsigned int c_byte = length;
-+
-+ if (c_byte) {
-+ bytes = msblk->devblksize - offset;
-+ compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte);
-+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
-+
-+ TRACE("Block @ 0x%llx, %scompressed size %d, src size %d\n", index, compressed
-+ ? "" : "un", (unsigned int) c_byte, srclength);
-+
-+ if (c_byte > srclength || index < 0 || (index + c_byte) > sblk->bytes_used)
-+ goto read_failure;
-+
-+ if (!(bh[0] = sb_getblk(s, cur_index)))
-+ goto block_release;
-+
-+ for (b = 1; bytes < c_byte; b++) {
-+ if (!(bh[b] = sb_getblk(s, ++cur_index)))
-+ goto block_release;
-+ bytes += msblk->devblksize;
-+ }
-+ ll_rw_block(READ, b, bh);
-+ } else {
-+ if (index < 0 || (index + 2) > sblk->bytes_used)
-+ goto read_failure;
-+
-+ if (!(bh[0] = get_block_length(s, &cur_index, &offset,
-+ &c_byte)))
-+ goto read_failure;
-+
-+ bytes = msblk->devblksize - offset;
-+ compressed = SQUASHFS_COMPRESSED(c_byte);
-+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
-+
-+ TRACE("Block @ 0x%llx, %scompressed size %d\n", index, compressed
-+ ? "" : "un", (unsigned int) c_byte);
-+
-+ if (c_byte > srclength || (index + c_byte) > sblk->bytes_used)
-+ goto read_failure;
-+
-+ for (b = 1; bytes < c_byte; b++) {
-+ if (!(bh[b] = sb_getblk(s, ++cur_index)))
-+ goto block_release;
-+ bytes += msblk->devblksize;
-+ }
-+ ll_rw_block(READ, b - 1, bh + 1);
-+ }
-+
-+ if (compressed) {
-+ int zlib_err = 0;
-+
-+ /*
-+ * uncompress block
-+ */
-+
-+ mutex_lock(&msblk->read_data_mutex);
-+
-+ msblk->stream.next_out = buffer;
-+ msblk->stream.avail_out = srclength;
-+
-+ for (bytes = 0; k < b; k++) {
-+ avail_bytes = (c_byte - bytes) > (msblk->devblksize - offset) ?
-+ msblk->devblksize - offset :
-+ c_byte - bytes;
-+ wait_on_buffer(bh[k]);
-+ if (!buffer_uptodate(bh[k]))
-+ goto release_mutex;
-+
-+ msblk->stream.next_in = bh[k]->b_data + offset;
-+ msblk->stream.avail_in = avail_bytes;
-+
-+ if (k == 0) {
-+ zlib_err = zlib_inflateInit(&msblk->stream);
-+ if (zlib_err != Z_OK) {
-+ ERROR("zlib_inflateInit returned unexpected result 0x%x, srclength %d\n",
-+ zlib_err, srclength);
-+ goto release_mutex;
-+ }
-+
-+ if (avail_bytes == 0) {
-+ offset = 0;
-+ brelse(bh[k]);
-+ continue;
-+ }
-+ }
-+
-+ zlib_err = zlib_inflate(&msblk->stream, Z_NO_FLUSH);
-+ if (zlib_err != Z_OK && zlib_err != Z_STREAM_END) {
-+ ERROR("zlib_inflate returned unexpected result 0x%x, srclength %d, avail_in %d, avail_out %d\n",
-+ zlib_err, srclength, msblk->stream.avail_in, msblk->stream.avail_out);
-+ goto release_mutex;
-+ }
-+
-+ bytes += avail_bytes;
-+ offset = 0;
-+ brelse(bh[k]);
-+ }
-+
-+ if (zlib_err != Z_STREAM_END)
-+ goto release_mutex;
-+
-+ zlib_err = zlib_inflateEnd(&msblk->stream);
-+ if (zlib_err != Z_OK) {
-+ ERROR("zlib_inflateEnd returned unexpected result 0x%x, srclength %d\n",
-+ zlib_err, srclength);
-+ goto release_mutex;
-+ }
-+ bytes = msblk->stream.total_out;
-+ mutex_unlock(&msblk->read_data_mutex);
-+ } else {
-+ int i;
-+
-+ for(i = 0; i < b; i++) {
-+ wait_on_buffer(bh[i]);
-+ if(!buffer_uptodate(bh[i]))
-+ goto block_release;
-+ }
-+
-+ for (bytes = 0; k < b; k++) {
-+ avail_bytes = (c_byte - bytes) > (msblk->devblksize - offset) ?
-+ msblk->devblksize - offset :
-+ c_byte - bytes;
-+ memcpy(buffer + bytes, bh[k]->b_data + offset, avail_bytes);
-+ bytes += avail_bytes;
-+ offset = 0;
-+ brelse(bh[k]);
-+ }
-+ }
-+
-+ if (next_index)
-+ *next_index = index + c_byte + (length ? 0 :
-+ (SQUASHFS_CHECK_DATA(msblk->sblk.flags)
-+ ? 3 : 2));
-+ return bytes;
-+
-+release_mutex:
-+ mutex_unlock(&msblk->read_data_mutex);
-+
-+block_release:
-+ for (; k < b; k++)
-+ brelse(bh[k]);
-+
-+read_failure:
-+ ERROR("sb_bread failed reading block 0x%x\n", cur_index);
-+ return 0;
-+}
-+
-+
-+SQSH_EXTERN int squashfs_get_cached_block(struct super_block *s, char *buffer,
-+ long long block, unsigned int offset,
-+ int length, long long *next_block,
-+ unsigned int *next_offset)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ int n, i, bytes, return_length = length;
-+ long long next_index;
-+
-+ TRACE("Entered squashfs_get_cached_block [%llx:%x]\n", block, offset);
-+
-+ while ( 1 ) {
-+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
-+ if (msblk->block_cache[i].block == block)
-+ break;
-+
-+ mutex_lock(&msblk->block_cache_mutex);
-+
-+ if (i == SQUASHFS_CACHED_BLKS) {
-+ /* read inode header block */
-+ for (i = msblk->next_cache, n = SQUASHFS_CACHED_BLKS;
-+ n ; n --, i = (i + 1) %
-+ SQUASHFS_CACHED_BLKS)
-+ if (msblk->block_cache[i].block !=
-+ SQUASHFS_USED_BLK)
-+ break;
-+
-+ if (n == 0) {
-+ wait_queue_t wait;
-+
-+ init_waitqueue_entry(&wait, current);
-+ add_wait_queue(&msblk->waitq, &wait);
-+ set_current_state(TASK_UNINTERRUPTIBLE);
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ schedule();
-+ set_current_state(TASK_RUNNING);
-+ remove_wait_queue(&msblk->waitq, &wait);
-+ continue;
-+ }
-+ msblk->next_cache = (i + 1) % SQUASHFS_CACHED_BLKS;
-+
-+ if (msblk->block_cache[i].block ==
-+ SQUASHFS_INVALID_BLK) {
-+ if (!(msblk->block_cache[i].data =
-+ kmalloc(SQUASHFS_METADATA_SIZE,
-+ GFP_KERNEL))) {
-+ ERROR("Failed to allocate cache"
-+ "block\n");
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ goto out;
-+ }
-+ }
-+
-+ msblk->block_cache[i].block = SQUASHFS_USED_BLK;
-+ mutex_unlock(&msblk->block_cache_mutex);
-+
-+ msblk->block_cache[i].length = squashfs_read_data(s,
-+ msblk->block_cache[i].data, block, 0, &next_index, SQUASHFS_METADATA_SIZE);
-+ if (msblk->block_cache[i].length == 0) {
-+ ERROR("Unable to read cache block [%llx:%x]\n",
-+ block, offset);
-+ mutex_lock(&msblk->block_cache_mutex);
-+ msblk->block_cache[i].block = SQUASHFS_INVALID_BLK;
-+ kfree(msblk->block_cache[i].data);
-+ wake_up(&msblk->waitq);
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ goto out;
-+ }
-+
-+ mutex_lock(&msblk->block_cache_mutex);
-+ wake_up(&msblk->waitq);
-+ msblk->block_cache[i].block = block;
-+ msblk->block_cache[i].next_index = next_index;
-+ TRACE("Read cache block [%llx:%x]\n", block, offset);
-+ }
-+
-+ if (msblk->block_cache[i].block != block) {
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ continue;
-+ }
-+
-+ bytes = msblk->block_cache[i].length - offset;
-+
-+ if (bytes < 1) {
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ goto out;
-+ } else if (bytes >= length) {
-+ if (buffer)
-+ memcpy(buffer, msblk->block_cache[i].data +
-+ offset, length);
-+ if (msblk->block_cache[i].length - offset == length) {
-+ *next_block = msblk->block_cache[i].next_index;
-+ *next_offset = 0;
-+ } else {
-+ *next_block = block;
-+ *next_offset = offset + length;
-+ }
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ goto finish;
-+ } else {
-+ if (buffer) {
-+ memcpy(buffer, msblk->block_cache[i].data +
-+ offset, bytes);
-+ buffer += bytes;
-+ }
-+ block = msblk->block_cache[i].next_index;
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ length -= bytes;
-+ offset = 0;
-+ }
-+ }
-+
-+finish:
-+ return return_length;
-+out:
-+ return 0;
-+}
-+
-+
-+static int get_fragment_location(struct super_block *s, unsigned int fragment,
-+ long long *fragment_start_block,
-+ unsigned int *fragment_size)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ long long start_block =
-+ msblk->fragment_index[SQUASHFS_FRAGMENT_INDEX(fragment)];
-+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET(fragment);
-+ struct squashfs_fragment_entry fragment_entry;
-+
-+ if (msblk->swap) {
-+ struct squashfs_fragment_entry sfragment_entry;
-+
-+ if (!squashfs_get_cached_block(s, (char *) &sfragment_entry,
-+ start_block, offset,
-+ sizeof(sfragment_entry), &start_block,
-+ &offset))
-+ goto out;
-+ SQUASHFS_SWAP_FRAGMENT_ENTRY(&fragment_entry, &sfragment_entry);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *) &fragment_entry,
-+ start_block, offset,
-+ sizeof(fragment_entry), &start_block,
-+ &offset))
-+ goto out;
-+
-+ *fragment_start_block = fragment_entry.start_block;
-+ *fragment_size = fragment_entry.size;
-+
-+ return 1;
-+
-+out:
-+ return 0;
-+}
-+
-+
-+SQSH_EXTERN void release_cached_fragment(struct squashfs_sb_info *msblk, struct
-+ squashfs_fragment_cache *fragment)
-+{
-+ mutex_lock(&msblk->fragment_mutex);
-+ fragment->locked --;
-+ wake_up(&msblk->fragment_wait_queue);
-+ mutex_unlock(&msblk->fragment_mutex);
-+}
-+
-+
-+SQSH_EXTERN struct squashfs_fragment_cache *get_cached_fragment(struct super_block
-+ *s, long long start_block,
-+ int length)
-+{
-+ int i, n;
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ while ( 1 ) {
-+ mutex_lock(&msblk->fragment_mutex);
-+
-+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS &&
-+ msblk->fragment[i].block != start_block; i++);
-+
-+ if (i == SQUASHFS_CACHED_FRAGMENTS) {
-+ for (i = msblk->next_fragment, n =
-+ SQUASHFS_CACHED_FRAGMENTS; n &&
-+ msblk->fragment[i].locked; n--, i = (i + 1) %
-+ SQUASHFS_CACHED_FRAGMENTS);
-+
-+ if (n == 0) {
-+ wait_queue_t wait;
-+
-+ init_waitqueue_entry(&wait, current);
-+ add_wait_queue(&msblk->fragment_wait_queue,
-+ &wait);
-+ set_current_state(TASK_UNINTERRUPTIBLE);
-+ mutex_unlock(&msblk->fragment_mutex);
-+ schedule();
-+ set_current_state(TASK_RUNNING);
-+ remove_wait_queue(&msblk->fragment_wait_queue,
-+ &wait);
-+ continue;
-+ }
-+ msblk->next_fragment = (msblk->next_fragment + 1) %
-+ SQUASHFS_CACHED_FRAGMENTS;
-+
-+ if (msblk->fragment[i].data == NULL)
-+ if (!(msblk->fragment[i].data = SQUASHFS_ALLOC
-+ (SQUASHFS_FILE_MAX_SIZE))) {
-+ ERROR("Failed to allocate fragment "
-+ "cache block\n");
-+ mutex_unlock(&msblk->fragment_mutex);
-+ goto out;
-+ }
-+
-+ msblk->fragment[i].block = SQUASHFS_INVALID_BLK;
-+ msblk->fragment[i].locked = 1;
-+ mutex_unlock(&msblk->fragment_mutex);
-+
-+ if (!(msblk->fragment[i].length = squashfs_read_data(s,
-+ msblk->fragment[i].data,
-+ start_block, length, NULL, sblk->block_size))) {
-+ ERROR("Unable to read fragment cache block "
-+ "[%llx]\n", start_block);
-+ msblk->fragment[i].locked = 0;
-+ smp_mb();
-+ goto out;
-+ }
-+
-+ mutex_lock(&msblk->fragment_mutex);
-+ msblk->fragment[i].block = start_block;
-+ TRACE("New fragment %d, start block %lld, locked %d\n",
-+ i, msblk->fragment[i].block,
-+ msblk->fragment[i].locked);
-+ mutex_unlock(&msblk->fragment_mutex);
-+ break;
-+ }
-+
-+ msblk->fragment[i].locked++;
-+ mutex_unlock(&msblk->fragment_mutex);
-+ TRACE("Got fragment %d, start block %lld, locked %d\n", i,
-+ msblk->fragment[i].block,
-+ msblk->fragment[i].locked);
-+ break;
-+ }
-+
-+ return &msblk->fragment[i];
-+
-+out:
-+ return NULL;
-+}
-+
-+
-+static void squashfs_new_inode(struct squashfs_sb_info *msblk, struct inode *i,
-+ struct squashfs_base_inode_header *inodeb)
-+{
-+ i->i_ino = inodeb->inode_number;
-+ i->i_mtime.tv_sec = inodeb->mtime;
-+ i->i_atime.tv_sec = inodeb->mtime;
-+ i->i_ctime.tv_sec = inodeb->mtime;
-+ i->i_uid = msblk->uid[inodeb->uid];
-+ i->i_mode = inodeb->mode;
-+ i->i_size = 0;
-+ if (inodeb->guid == SQUASHFS_GUIDS)
-+ i->i_gid = i->i_uid;
-+ else
-+ i->i_gid = msblk->guid[inodeb->guid];
-+}
-+
-+
-+static squashfs_inode_t squashfs_inode_lookup(struct super_block *s, int ino)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ long long start = msblk->inode_lookup_table[SQUASHFS_LOOKUP_BLOCK(ino - 1)];
-+ int offset = SQUASHFS_LOOKUP_BLOCK_OFFSET(ino - 1);
-+ squashfs_inode_t inode;
-+
-+ TRACE("Entered squashfs_inode_lookup, inode_number = %d\n", ino);
-+
-+ if (msblk->swap) {
-+ squashfs_inode_t sinode;
-+
-+ if (!squashfs_get_cached_block(s, (char *) &sinode, start, offset,
-+ sizeof(sinode), &start, &offset))
-+ goto out;
-+ SQUASHFS_SWAP_INODE_T((&inode), &sinode);
-+ } else if (!squashfs_get_cached_block(s, (char *) &inode, start, offset,
-+ sizeof(inode), &start, &offset))
-+ goto out;
-+
-+ TRACE("squashfs_inode_lookup, inode = 0x%llx\n", inode);
-+
-+ return inode;
-+
-+out:
-+ return SQUASHFS_INVALID_BLK;
-+}
-+
-+
-+static void vfs_read_inode(struct inode *i)
-+{
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ squashfs_inode_t inode = squashfs_inode_lookup(i->i_sb, i->i_ino);
-+
-+ TRACE("Entered vfs_read_inode\n");
-+
-+ if(inode != SQUASHFS_INVALID_BLK)
-+ (msblk->read_inode)(i, inode);
-+}
-+
-+
-+static struct dentry *squashfs_get_parent(struct dentry *child)
-+{
-+ struct inode *i = child->d_inode;
-+ struct inode *parent = iget(i->i_sb, SQUASHFS_I(i)->u.s2.parent_inode);
-+ struct dentry *rv;
-+
-+ TRACE("Entered squashfs_get_parent\n");
-+
-+ if(parent == NULL) {
-+ rv = ERR_PTR(-EACCES);
-+ goto out;
-+ }
-+
-+ rv = d_alloc_anon(parent);
-+ if(rv == NULL)
-+ rv = ERR_PTR(-ENOMEM);
-+
-+out:
-+ return rv;
-+}
-+
-+
-+SQSH_EXTERN struct inode *squashfs_iget(struct super_block *s, squashfs_inode_t inode, unsigned int inode_number)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct inode *i = iget_locked(s, inode_number);
-+
-+ TRACE("Entered squashfs_iget\n");
-+
-+ if(i && (i->i_state & I_NEW)) {
-+ (msblk->read_inode)(i, inode);
-+ unlock_new_inode(i);
-+ }
-+
-+ return i;
-+}
-+
-+
-+static int squashfs_read_inode(struct inode *i, squashfs_inode_t inode)
-+{
-+ struct super_block *s = i->i_sb;
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long block = SQUASHFS_INODE_BLK(inode) +
-+ sblk->inode_table_start;
-+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
-+ long long next_block;
-+ unsigned int next_offset;
-+ union squashfs_inode_header id, sid;
-+ struct squashfs_base_inode_header *inodeb = &id.base,
-+ *sinodeb = &sid.base;
-+
-+ TRACE("Entered squashfs_read_inode\n");
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *) sinodeb, block,
-+ offset, sizeof(*sinodeb), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_BASE_INODE_HEADER(inodeb, sinodeb,
-+ sizeof(*sinodeb));
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *) inodeb, block,
-+ offset, sizeof(*inodeb), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ squashfs_new_inode(msblk, i, inodeb);
-+
-+ switch(inodeb->inode_type) {
-+ case SQUASHFS_FILE_TYPE: {
-+ unsigned int frag_size;
-+ long long frag_blk;
-+ struct squashfs_reg_inode_header *inodep = &id.reg;
-+ struct squashfs_reg_inode_header *sinodep = &sid.reg;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_REG_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ frag_blk = SQUASHFS_INVALID_BLK;
-+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
-+ !get_fragment_location(s,
-+ inodep->fragment, &frag_blk, &frag_size))
-+ goto failed_read;
-+
-+ i->i_nlink = 1;
-+ i->i_size = inodep->file_size;
-+ i->i_fop = &generic_ro_fops;
-+ i->i_mode |= S_IFREG;
-+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
-+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
-+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
-+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+ if (sblk->block_size > 4096)
-+ i->i_data.a_ops = &squashfs_aops;
-+ else
-+ i->i_data.a_ops = &squashfs_aops_4K;
-+
-+ TRACE("File inode %x:%x, start_block %llx, "
-+ "block_list_start %llx, offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, next_block,
-+ next_offset);
-+ break;
-+ }
-+ case SQUASHFS_LREG_TYPE: {
-+ unsigned int frag_size;
-+ long long frag_blk;
-+ struct squashfs_lreg_inode_header *inodep = &id.lreg;
-+ struct squashfs_lreg_inode_header *sinodep = &sid.lreg;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_LREG_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ frag_blk = SQUASHFS_INVALID_BLK;
-+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
-+ !get_fragment_location(s,
-+ inodep->fragment, &frag_blk, &frag_size))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_size = inodep->file_size;
-+ i->i_fop = &generic_ro_fops;
-+ i->i_mode |= S_IFREG;
-+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
-+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
-+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
-+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+ if (sblk->block_size > 4096)
-+ i->i_data.a_ops = &squashfs_aops;
-+ else
-+ i->i_data.a_ops = &squashfs_aops_4K;
-+
-+ TRACE("File inode %x:%x, start_block %llx, "
-+ "block_list_start %llx, offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, next_block,
-+ next_offset);
-+ break;
-+ }
-+ case SQUASHFS_DIR_TYPE: {
-+ struct squashfs_dir_inode_header *inodep = &id.dir;
-+ struct squashfs_dir_inode_header *sinodep = &sid.dir;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_DIR_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_size = inodep->file_size;
-+ i->i_op = &squashfs_dir_inode_ops;
-+ i->i_fop = &squashfs_dir_ops;
-+ i->i_mode |= S_IFDIR;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->offset = inodep->offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_count = 0;
-+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
-+
-+ TRACE("Directory inode %x:%x, start_block %x, offset "
-+ "%x\n", SQUASHFS_INODE_BLK(inode),
-+ offset, inodep->start_block,
-+ inodep->offset);
-+ break;
-+ }
-+ case SQUASHFS_LDIR_TYPE: {
-+ struct squashfs_ldir_inode_header *inodep = &id.ldir;
-+ struct squashfs_ldir_inode_header *sinodep = &sid.ldir;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_LDIR_INODE_HEADER(inodep,
-+ sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_size = inodep->file_size;
-+ i->i_op = &squashfs_dir_inode_ops;
-+ i->i_fop = &squashfs_dir_ops;
-+ i->i_mode |= S_IFDIR;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->offset = inodep->offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
-+ SQUASHFS_I(i)->u.s2.directory_index_offset =
-+ next_offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_count =
-+ inodep->i_count;
-+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
-+
-+ TRACE("Long directory inode %x:%x, start_block %x, "
-+ "offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, inodep->offset);
-+ break;
-+ }
-+ case SQUASHFS_SYMLINK_TYPE: {
-+ struct squashfs_symlink_inode_header *inodep =
-+ &id.symlink;
-+ struct squashfs_symlink_inode_header *sinodep =
-+ &sid.symlink;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER(inodep,
-+ sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_size = inodep->symlink_size;
-+ i->i_op = &page_symlink_inode_operations;
-+ i->i_data.a_ops = &squashfs_symlink_aops;
-+ i->i_mode |= S_IFLNK;
-+ SQUASHFS_I(i)->start_block = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+
-+ TRACE("Symbolic link inode %x:%x, start_block %llx, "
-+ "offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ next_block, next_offset);
-+ break;
-+ }
-+ case SQUASHFS_BLKDEV_TYPE:
-+ case SQUASHFS_CHRDEV_TYPE: {
-+ struct squashfs_dev_inode_header *inodep = &id.dev;
-+ struct squashfs_dev_inode_header *sinodep = &sid.dev;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_DEV_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_mode |= (inodeb->inode_type ==
-+ SQUASHFS_CHRDEV_TYPE) ? S_IFCHR :
-+ S_IFBLK;
-+ init_special_inode(i, i->i_mode,
-+ old_decode_dev(inodep->rdev));
-+
-+ TRACE("Device inode %x:%x, rdev %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->rdev);
-+ break;
-+ }
-+ case SQUASHFS_FIFO_TYPE:
-+ case SQUASHFS_SOCKET_TYPE: {
-+ struct squashfs_ipc_inode_header *inodep = &id.ipc;
-+ struct squashfs_ipc_inode_header *sinodep = &sid.ipc;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_IPC_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_mode |= (inodeb->inode_type == SQUASHFS_FIFO_TYPE)
-+ ? S_IFIFO : S_IFSOCK;
-+ init_special_inode(i, i->i_mode, 0);
-+ break;
-+ }
-+ default:
-+ ERROR("Unknown inode type %d in squashfs_iget!\n",
-+ inodeb->inode_type);
-+ goto failed_read1;
-+ }
-+
-+ return 1;
-+
-+failed_read:
-+ ERROR("Unable to read inode [%llx:%x]\n", block, offset);
-+
-+failed_read1:
-+ make_bad_inode(i);
-+ return 0;
-+}
-+
-+
-+static int read_inode_lookup_table(struct super_block *s)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned int length = SQUASHFS_LOOKUP_BLOCK_BYTES(sblk->inodes);
-+
-+ TRACE("In read_inode_lookup_table, length %d\n", length);
-+
-+ /* Allocate inode lookup table */
-+ if (!(msblk->inode_lookup_table = kmalloc(length, GFP_KERNEL))) {
-+ ERROR("Failed to allocate inode lookup table\n");
-+ return 0;
-+ }
-+
-+ if (!squashfs_read_data(s, (char *) msblk->inode_lookup_table,
-+ sblk->lookup_table_start, length |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length)) {
-+ ERROR("unable to read inode lookup table\n");
-+ return 0;
-+ }
-+
-+ if (msblk->swap) {
-+ int i;
-+ long long block;
-+
-+ for (i = 0; i < SQUASHFS_LOOKUP_BLOCKS(sblk->inodes); i++) {
-+ SQUASHFS_SWAP_LOOKUP_BLOCKS((&block),
-+ &msblk->inode_lookup_table[i], 1);
-+ msblk->inode_lookup_table[i] = block;
-+ }
-+ }
-+
-+ return 1;
-+}
-+
-+
-+static int read_fragment_index_table(struct super_block *s)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned int length = SQUASHFS_FRAGMENT_INDEX_BYTES(sblk->fragments);
-+
-+ if(length == 0)
-+ return 1;
-+
-+ /* Allocate fragment index table */
-+ if (!(msblk->fragment_index = kmalloc(length, GFP_KERNEL))) {
-+ ERROR("Failed to allocate fragment index table\n");
-+ return 0;
-+ }
-+
-+ if (!squashfs_read_data(s, (char *) msblk->fragment_index,
-+ sblk->fragment_table_start, length |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length)) {
-+ ERROR("unable to read fragment index table\n");
-+ return 0;
-+ }
-+
-+ if (msblk->swap) {
-+ int i;
-+ long long fragment;
-+
-+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES(sblk->fragments); i++) {
-+ SQUASHFS_SWAP_FRAGMENT_INDEXES((&fragment),
-+ &msblk->fragment_index[i], 1);
-+ msblk->fragment_index[i] = fragment;
-+ }
-+ }
-+
-+ return 1;
-+}
-+
-+
-+static int supported_squashfs_filesystem(struct squashfs_sb_info *msblk, int silent)
-+{
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ msblk->read_inode = squashfs_read_inode;
-+ msblk->read_blocklist = read_blocklist;
-+ msblk->read_fragment_index_table = read_fragment_index_table;
-+
-+ if (sblk->s_major == 1) {
-+ if (!squashfs_1_0_supported(msblk)) {
-+ SERROR("Major/Minor mismatch, Squashfs 1.0 filesystems "
-+ "are unsupported\n");
-+ SERROR("Please recompile with "
-+ "Squashfs 1.0 support enabled\n");
-+ return 0;
-+ }
-+ } else if (sblk->s_major == 2) {
-+ if (!squashfs_2_0_supported(msblk)) {
-+ SERROR("Major/Minor mismatch, Squashfs 2.0 filesystems "
-+ "are unsupported\n");
-+ SERROR("Please recompile with "
-+ "Squashfs 2.0 support enabled\n");
-+ return 0;
-+ }
-+ } else if(sblk->s_major != SQUASHFS_MAJOR || sblk->s_minor >
-+ SQUASHFS_MINOR) {
-+ SERROR("Major/Minor mismatch, trying to mount newer %d.%d "
-+ "filesystem\n", sblk->s_major, sblk->s_minor);
-+ SERROR("Please update your kernel\n");
-+ return 0;
-+ }
-+
-+ return 1;
-+}
-+
-+
-+static int squashfs_fill_super(struct super_block *s, void *data, int silent)
-+{
-+ struct squashfs_sb_info *msblk;
-+ struct squashfs_super_block *sblk;
-+ int i;
-+ char b[BDEVNAME_SIZE];
-+ struct inode *root;
-+
-+ TRACE("Entered squashfs_read_superblock\n");
-+
-+ if (!(s->s_fs_info = kmalloc(sizeof(struct squashfs_sb_info),
-+ GFP_KERNEL))) {
-+ ERROR("Failed to allocate superblock\n");
-+ goto failure;
-+ }
-+ memset(s->s_fs_info, 0, sizeof(struct squashfs_sb_info));
-+ msblk = s->s_fs_info;
-+ if (!(msblk->stream.workspace = vmalloc(zlib_inflate_workspacesize()))) {
-+ ERROR("Failed to allocate zlib workspace\n");
-+ goto failure;
-+ }
-+ sblk = &msblk->sblk;
-+
-+ msblk->devblksize = sb_min_blocksize(s, BLOCK_SIZE);
-+ msblk->devblksize_log2 = ffz(~msblk->devblksize);
-+
-+ mutex_init(&msblk->read_data_mutex);
-+ mutex_init(&msblk->read_page_mutex);
-+ mutex_init(&msblk->block_cache_mutex);
-+ mutex_init(&msblk->fragment_mutex);
-+ mutex_init(&msblk->meta_index_mutex);
-+
-+ init_waitqueue_head(&msblk->waitq);
-+ init_waitqueue_head(&msblk->fragment_wait_queue);
-+
-+ sblk->bytes_used = sizeof(struct squashfs_super_block);
-+ if (!squashfs_read_data(s, (char *) sblk, SQUASHFS_START,
-+ sizeof(struct squashfs_super_block) |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, sizeof(struct squashfs_super_block))) {
-+ SERROR("unable to read superblock\n");
-+ goto failed_mount;
-+ }
-+
-+ /* Check it is a SQUASHFS superblock */
-+ msblk->swap = 0;
-+ if ((s->s_magic = sblk->s_magic) != SQUASHFS_MAGIC) {
-+ if (sblk->s_magic == SQUASHFS_MAGIC_SWAP) {
-+ struct squashfs_super_block ssblk;
-+
-+ WARNING("Mounting a different endian SQUASHFS "
-+ "filesystem on %s\n", bdevname(s->s_bdev, b));
-+
-+ SQUASHFS_SWAP_SUPER_BLOCK(&ssblk, sblk);
-+ memcpy(sblk, &ssblk, sizeof(struct squashfs_super_block));
-+ msblk->swap = 1;
-+ } else {
-+ SERROR("Can't find a SQUASHFS superblock on %s\n",
-+ bdevname(s->s_bdev, b));
-+ goto failed_mount;
-+ }
-+ }
-+
-+ /* Check the MAJOR & MINOR versions */
-+ if(!supported_squashfs_filesystem(msblk, silent))
-+ goto failed_mount;
-+
-+ /* Check the filesystem does not extend beyond the end of the
-+ block device */
-+ if(sblk->bytes_used < 0 || sblk->bytes_used > i_size_read(s->s_bdev->bd_inode))
-+ goto failed_mount;
-+
-+ /* Check the root inode for sanity */
-+ if (SQUASHFS_INODE_OFFSET(sblk->root_inode) > SQUASHFS_METADATA_SIZE)
-+ goto failed_mount;
-+
-+ TRACE("Found valid superblock on %s\n", bdevname(s->s_bdev, b));
-+ TRACE("Inodes are %scompressed\n",
-+ SQUASHFS_UNCOMPRESSED_INODES
-+ (sblk->flags) ? "un" : "");
-+ TRACE("Data is %scompressed\n",
-+ SQUASHFS_UNCOMPRESSED_DATA(sblk->flags)
-+ ? "un" : "");
-+ TRACE("Check data is %s present in the filesystem\n",
-+ SQUASHFS_CHECK_DATA(sblk->flags) ?
-+ "" : "not");
-+ TRACE("Filesystem size %lld bytes\n", sblk->bytes_used);
-+ TRACE("Block size %d\n", sblk->block_size);
-+ TRACE("Number of inodes %d\n", sblk->inodes);
-+ if (sblk->s_major > 1)
-+ TRACE("Number of fragments %d\n", sblk->fragments);
-+ TRACE("Number of uids %d\n", sblk->no_uids);
-+ TRACE("Number of gids %d\n", sblk->no_guids);
-+ TRACE("sblk->inode_table_start %llx\n", sblk->inode_table_start);
-+ TRACE("sblk->directory_table_start %llx\n", sblk->directory_table_start);
-+ if (sblk->s_major > 1)
-+ TRACE("sblk->fragment_table_start %llx\n",
-+ sblk->fragment_table_start);
-+ TRACE("sblk->uid_start %llx\n", sblk->uid_start);
-+
-+ s->s_flags |= MS_RDONLY;
-+ s->s_op = &squashfs_super_ops;
-+
-+ /* Init inode_table block pointer array */
-+ if (!(msblk->block_cache = kmalloc(sizeof(struct squashfs_cache) *
-+ SQUASHFS_CACHED_BLKS, GFP_KERNEL))) {
-+ ERROR("Failed to allocate block cache\n");
-+ goto failed_mount;
-+ }
-+
-+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
-+ msblk->block_cache[i].block = SQUASHFS_INVALID_BLK;
-+
-+ msblk->next_cache = 0;
-+
-+ /* Allocate read_page block */
-+ if (!(msblk->read_page = kmalloc(sblk->block_size, GFP_KERNEL))) {
-+ ERROR("Failed to allocate read_page block\n");
-+ goto failed_mount;
-+ }
-+
-+ /* Allocate uid and gid tables */
-+ if (!(msblk->uid = kmalloc((sblk->no_uids + sblk->no_guids) *
-+ sizeof(unsigned int), GFP_KERNEL))) {
-+ ERROR("Failed to allocate uid/gid table\n");
-+ goto failed_mount;
-+ }
-+ msblk->guid = msblk->uid + sblk->no_uids;
-+
-+ if (msblk->swap) {
-+ unsigned int suid[sblk->no_uids + sblk->no_guids];
-+
-+ if (!squashfs_read_data(s, (char *) &suid, sblk->uid_start,
-+ ((sblk->no_uids + sblk->no_guids) *
-+ sizeof(unsigned int)) |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, (sblk->no_uids + sblk->no_guids) * sizeof(unsigned int))) {
-+ ERROR("unable to read uid/gid table\n");
-+ goto failed_mount;
-+ }
-+
-+ SQUASHFS_SWAP_DATA(msblk->uid, suid, (sblk->no_uids +
-+ sblk->no_guids), (sizeof(unsigned int) * 8));
-+ } else
-+ if (!squashfs_read_data(s, (char *) msblk->uid, sblk->uid_start,
-+ ((sblk->no_uids + sblk->no_guids) *
-+ sizeof(unsigned int)) |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, (sblk->no_uids + sblk->no_guids) * sizeof(unsigned int))) {
-+ ERROR("unable to read uid/gid table\n");
-+ goto failed_mount;
-+ }
-+
-+
-+ if (sblk->s_major == 1 && squashfs_1_0_supported(msblk))
-+ goto allocate_root;
-+
-+ if (!(msblk->fragment = kmalloc(sizeof(struct squashfs_fragment_cache) *
-+ SQUASHFS_CACHED_FRAGMENTS, GFP_KERNEL))) {
-+ ERROR("Failed to allocate fragment block cache\n");
-+ goto failed_mount;
-+ }
-+
-+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++) {
-+ msblk->fragment[i].locked = 0;
-+ msblk->fragment[i].block = SQUASHFS_INVALID_BLK;
-+ msblk->fragment[i].data = NULL;
-+ }
-+
-+ msblk->next_fragment = 0;
-+
-+ /* Allocate and read fragment index table */
-+ if (msblk->read_fragment_index_table(s) == 0)
-+ goto failed_mount;
-+
-+ if(sblk->s_major < 3 || sblk->lookup_table_start == SQUASHFS_INVALID_BLK)
-+ goto allocate_root;
-+
-+ /* Allocate and read inode lookup table */
-+ if (read_inode_lookup_table(s) == 0)
-+ goto failed_mount;
-+
-+ s->s_op = &squashfs_export_super_ops;
-+ s->s_export_op = &squashfs_export_ops;
-+
-+allocate_root:
-+ root = new_inode(s);
-+ if ((msblk->read_inode)(root, sblk->root_inode) == 0)
-+ goto failed_mount;
-+ insert_inode_hash(root);
-+
-+ if ((s->s_root = d_alloc_root(root)) == NULL) {
-+ ERROR("Root inode create failed\n");
-+ iput(root);
-+ goto failed_mount;
-+ }
-+
-+ TRACE("Leaving squashfs_read_super\n");
-+ return 0;
-+
-+failed_mount:
-+ kfree(msblk->inode_lookup_table);
-+ kfree(msblk->fragment_index);
-+ kfree(msblk->fragment);
-+ kfree(msblk->uid);
-+ kfree(msblk->read_page);
-+ kfree(msblk->block_cache);
-+ kfree(msblk->fragment_index_2);
-+ vfree(msblk->stream.workspace);
-+ kfree(s->s_fs_info);
-+ s->s_fs_info = NULL;
-+ return -EINVAL;
-+
-+failure:
-+ return -ENOMEM;
-+}
-+
-+
-+static int squashfs_statfs(struct dentry *dentry, struct kstatfs *buf)
-+{
-+ struct squashfs_sb_info *msblk = dentry->d_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ TRACE("Entered squashfs_statfs\n");
-+
-+ buf->f_type = SQUASHFS_MAGIC;
-+ buf->f_bsize = sblk->block_size;
-+ buf->f_blocks = ((sblk->bytes_used - 1) >> sblk->block_log) + 1;
-+ buf->f_bfree = buf->f_bavail = 0;
-+ buf->f_files = sblk->inodes;
-+ buf->f_ffree = 0;
-+ buf->f_namelen = SQUASHFS_NAME_LEN;
-+
-+ return 0;
-+}
-+
-+
-+static int squashfs_symlink_readpage(struct file *file, struct page *page)
-+{
-+ struct inode *inode = page->mapping->host;
-+ int index = page->index << PAGE_CACHE_SHIFT, length, bytes;
-+ long long block = SQUASHFS_I(inode)->start_block;
-+ int offset = SQUASHFS_I(inode)->offset;
-+ void *pageaddr = kmap(page);
-+
-+ TRACE("Entered squashfs_symlink_readpage, page index %ld, start block "
-+ "%llx, offset %x\n", page->index,
-+ SQUASHFS_I(inode)->start_block,
-+ SQUASHFS_I(inode)->offset);
-+
-+ for (length = 0; length < index; length += bytes) {
-+ if (!(bytes = squashfs_get_cached_block(inode->i_sb, NULL,
-+ block, offset, PAGE_CACHE_SIZE, &block,
-+ &offset))) {
-+ ERROR("Unable to read symbolic link [%llx:%x]\n", block,
-+ offset);
-+ goto skip_read;
-+ }
-+ }
-+
-+ if (length != index) {
-+ ERROR("(squashfs_symlink_readpage) length != index\n");
-+ bytes = 0;
-+ goto skip_read;
-+ }
-+
-+ bytes = (i_size_read(inode) - length) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE :
-+ i_size_read(inode) - length;
-+
-+ if (!(bytes = squashfs_get_cached_block(inode->i_sb, pageaddr, block,
-+ offset, bytes, &block, &offset)))
-+ ERROR("Unable to read symbolic link [%llx:%x]\n", block, offset);
-+
-+skip_read:
-+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
-+ kunmap(page);
-+ flush_dcache_page(page);
-+ SetPageUptodate(page);
-+ unlock_page(page);
-+
-+ return 0;
-+}
-+
-+
-+struct meta_index *locate_meta_index(struct inode *inode, int index, int offset)
-+{
-+ struct meta_index *meta = NULL;
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ int i;
-+
-+ mutex_lock(&msblk->meta_index_mutex);
-+
-+ TRACE("locate_meta_index: index %d, offset %d\n", index, offset);
-+
-+ if(msblk->meta_index == NULL)
-+ goto not_allocated;
-+
-+ for (i = 0; i < SQUASHFS_META_NUMBER; i ++)
-+ if (msblk->meta_index[i].inode_number == inode->i_ino &&
-+ msblk->meta_index[i].offset >= offset &&
-+ msblk->meta_index[i].offset <= index &&
-+ msblk->meta_index[i].locked == 0) {
-+ TRACE("locate_meta_index: entry %d, offset %d\n", i,
-+ msblk->meta_index[i].offset);
-+ meta = &msblk->meta_index[i];
-+ offset = meta->offset;
-+ }
-+
-+ if (meta)
-+ meta->locked = 1;
-+
-+not_allocated:
-+ mutex_unlock(&msblk->meta_index_mutex);
-+
-+ return meta;
-+}
-+
-+
-+struct meta_index *empty_meta_index(struct inode *inode, int offset, int skip)
-+{
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ struct meta_index *meta = NULL;
-+ int i;
-+
-+ mutex_lock(&msblk->meta_index_mutex);
-+
-+ TRACE("empty_meta_index: offset %d, skip %d\n", offset, skip);
-+
-+ if(msblk->meta_index == NULL) {
-+ if (!(msblk->meta_index = kmalloc(sizeof(struct meta_index) *
-+ SQUASHFS_META_NUMBER, GFP_KERNEL))) {
-+ ERROR("Failed to allocate meta_index\n");
-+ goto failed;
-+ }
-+ for(i = 0; i < SQUASHFS_META_NUMBER; i++) {
-+ msblk->meta_index[i].inode_number = 0;
-+ msblk->meta_index[i].locked = 0;
-+ }
-+ msblk->next_meta_index = 0;
-+ }
-+
-+ for(i = SQUASHFS_META_NUMBER; i &&
-+ msblk->meta_index[msblk->next_meta_index].locked; i --)
-+ msblk->next_meta_index = (msblk->next_meta_index + 1) %
-+ SQUASHFS_META_NUMBER;
-+
-+ if(i == 0) {
-+ TRACE("empty_meta_index: failed!\n");
-+ goto failed;
-+ }
-+
-+ TRACE("empty_meta_index: returned meta entry %d, %p\n",
-+ msblk->next_meta_index,
-+ &msblk->meta_index[msblk->next_meta_index]);
-+
-+ meta = &msblk->meta_index[msblk->next_meta_index];
-+ msblk->next_meta_index = (msblk->next_meta_index + 1) %
-+ SQUASHFS_META_NUMBER;
-+
-+ meta->inode_number = inode->i_ino;
-+ meta->offset = offset;
-+ meta->skip = skip;
-+ meta->entries = 0;
-+ meta->locked = 1;
-+
-+failed:
-+ mutex_unlock(&msblk->meta_index_mutex);
-+ return meta;
-+}
-+
-+
-+void release_meta_index(struct inode *inode, struct meta_index *meta)
-+{
-+ meta->locked = 0;
-+ smp_mb();
-+}
-+
-+
-+static int read_block_index(struct super_block *s, int blocks, char *block_list,
-+ long long *start_block, int *offset)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ unsigned int *block_listp;
-+ int block = 0;
-+
-+ if (msblk->swap) {
-+ char sblock_list[blocks << 2];
-+
-+ if (!squashfs_get_cached_block(s, sblock_list, *start_block,
-+ *offset, blocks << 2, start_block, offset)) {
-+ ERROR("Unable to read block list [%llx:%x]\n",
-+ *start_block, *offset);
-+ goto failure;
-+ }
-+ SQUASHFS_SWAP_INTS(((unsigned int *)block_list),
-+ ((unsigned int *)sblock_list), blocks);
-+ } else
-+ if (!squashfs_get_cached_block(s, block_list, *start_block,
-+ *offset, blocks << 2, start_block, offset)) {
-+ ERROR("Unable to read block list [%llx:%x]\n",
-+ *start_block, *offset);
-+ goto failure;
-+ }
-+
-+ for (block_listp = (unsigned int *) block_list; blocks;
-+ block_listp++, blocks --)
-+ block += SQUASHFS_COMPRESSED_SIZE_BLOCK(*block_listp);
-+
-+ return block;
-+
-+failure:
-+ return -1;
-+}
-+
-+
-+#define SIZE 256
-+
-+static inline int calculate_skip(int blocks) {
-+ int skip = (blocks - 1) / ((SQUASHFS_SLOTS * SQUASHFS_META_ENTRIES + 1) * SQUASHFS_META_INDEXES);
-+ return skip >= 7 ? 7 : skip + 1;
-+}
-+
-+
-+static int get_meta_index(struct inode *inode, int index,
-+ long long *index_block, int *index_offset,
-+ long long *data_block, char *block_list)
-+{
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int skip = calculate_skip(i_size_read(inode) >> sblk->block_log);
-+ int offset = 0;
-+ struct meta_index *meta;
-+ struct meta_entry *meta_entry;
-+ long long cur_index_block = SQUASHFS_I(inode)->u.s1.block_list_start;
-+ int cur_offset = SQUASHFS_I(inode)->offset;
-+ long long cur_data_block = SQUASHFS_I(inode)->start_block;
-+ int i;
-+
-+ index /= SQUASHFS_META_INDEXES * skip;
-+
-+ while ( offset < index ) {
-+ meta = locate_meta_index(inode, index, offset + 1);
-+
-+ if (meta == NULL) {
-+ if ((meta = empty_meta_index(inode, offset + 1,
-+ skip)) == NULL)
-+ goto all_done;
-+ } else {
-+ if(meta->entries == 0)
-+ goto failed;
-+ offset = index < meta->offset + meta->entries ? index :
-+ meta->offset + meta->entries - 1;
-+ meta_entry = &meta->meta_entry[offset - meta->offset];
-+ cur_index_block = meta_entry->index_block + sblk->inode_table_start;
-+ cur_offset = meta_entry->offset;
-+ cur_data_block = meta_entry->data_block;
-+ TRACE("get_meta_index: offset %d, meta->offset %d, "
-+ "meta->entries %d\n", offset, meta->offset,
-+ meta->entries);
-+ TRACE("get_meta_index: index_block 0x%llx, offset 0x%x"
-+ " data_block 0x%llx\n", cur_index_block,
-+ cur_offset, cur_data_block);
-+ }
-+
-+ for (i = meta->offset + meta->entries; i <= index &&
-+ i < meta->offset + SQUASHFS_META_ENTRIES; i++) {
-+ int blocks = skip * SQUASHFS_META_INDEXES;
-+
-+ while (blocks) {
-+ int block = blocks > (SIZE >> 2) ? (SIZE >> 2) :
-+ blocks;
-+ int res = read_block_index(inode->i_sb, block,
-+ block_list, &cur_index_block,
-+ &cur_offset);
-+
-+ if (res == -1)
-+ goto failed;
-+
-+ cur_data_block += res;
-+ blocks -= block;
-+ }
-+
-+ meta_entry = &meta->meta_entry[i - meta->offset];
-+ meta_entry->index_block = cur_index_block - sblk->inode_table_start;
-+ meta_entry->offset = cur_offset;
-+ meta_entry->data_block = cur_data_block;
-+ meta->entries ++;
-+ offset ++;
-+ }
-+
-+ TRACE("get_meta_index: meta->offset %d, meta->entries %d\n",
-+ meta->offset, meta->entries);
-+
-+ release_meta_index(inode, meta);
-+ }
-+
-+all_done:
-+ *index_block = cur_index_block;
-+ *index_offset = cur_offset;
-+ *data_block = cur_data_block;
-+
-+ return offset * SQUASHFS_META_INDEXES * skip;
-+
-+failed:
-+ release_meta_index(inode, meta);
-+ return -1;
-+}
-+
-+
-+static long long read_blocklist(struct inode *inode, int index,
-+ int readahead_blks, char *block_list,
-+ unsigned short **block_p, unsigned int *bsize)
-+{
-+ long long block_ptr;
-+ int offset;
-+ long long block;
-+ int res = get_meta_index(inode, index, &block_ptr, &offset, &block,
-+ block_list);
-+
-+ TRACE("read_blocklist: res %d, index %d, block_ptr 0x%llx, offset"
-+ " 0x%x, block 0x%llx\n", res, index, block_ptr, offset,
-+ block);
-+
-+ if(res == -1)
-+ goto failure;
-+
-+ index -= res;
-+
-+ while ( index ) {
-+ int blocks = index > (SIZE >> 2) ? (SIZE >> 2) : index;
-+ int res = read_block_index(inode->i_sb, blocks, block_list,
-+ &block_ptr, &offset);
-+ if (res == -1)
-+ goto failure;
-+ block += res;
-+ index -= blocks;
-+ }
-+
-+ if (read_block_index(inode->i_sb, 1, block_list,
-+ &block_ptr, &offset) == -1)
-+ goto failure;
-+ *bsize = *((unsigned int *) block_list);
-+
-+ return block;
-+
-+failure:
-+ return 0;
-+}
-+
-+
-+static int squashfs_readpage(struct file *file, struct page *page)
-+{
-+ struct inode *inode = page->mapping->host;
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned char *block_list;
-+ long long block;
-+ unsigned int bsize, i = 0, bytes = 0, byte_offset = 0;
-+ int index = page->index >> (sblk->block_log - PAGE_CACHE_SHIFT);
-+ void *pageaddr;
-+ struct squashfs_fragment_cache *fragment = NULL;
-+ char *data_ptr = msblk->read_page;
-+
-+ int mask = (1 << (sblk->block_log - PAGE_CACHE_SHIFT)) - 1;
-+ int start_index = page->index & ~mask;
-+ int end_index = start_index | mask;
-+
-+ TRACE("Entered squashfs_readpage, page index %lx, start block %llx\n",
-+ page->index,
-+ SQUASHFS_I(inode)->start_block);
-+
-+ if (!(block_list = kmalloc(SIZE, GFP_KERNEL))) {
-+ ERROR("Failed to allocate block_list\n");
-+ goto skip_read;
-+ }
-+
-+ if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
-+ PAGE_CACHE_SHIFT))
-+ goto skip_read;
-+
-+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
-+ || index < (i_size_read(inode) >>
-+ sblk->block_log)) {
-+ if ((block = (msblk->read_blocklist)(inode, index, 1,
-+ block_list, NULL, &bsize)) == 0)
-+ goto skip_read;
-+
-+ mutex_lock(&msblk->read_page_mutex);
-+
-+ if (!(bytes = squashfs_read_data(inode->i_sb, msblk->read_page,
-+ block, bsize, NULL, sblk->block_size))) {
-+ ERROR("Unable to read page, block %llx, size %x\n", block,
-+ bsize);
-+ mutex_unlock(&msblk->read_page_mutex);
-+ goto skip_read;
-+ }
-+ } else {
-+ if ((fragment = get_cached_fragment(inode->i_sb,
-+ SQUASHFS_I(inode)->
-+ u.s1.fragment_start_block,
-+ SQUASHFS_I(inode)->u.s1.fragment_size))
-+ == NULL) {
-+ ERROR("Unable to read page, block %llx, size %x\n",
-+ SQUASHFS_I(inode)->
-+ u.s1.fragment_start_block,
-+ (int) SQUASHFS_I(inode)->
-+ u.s1.fragment_size);
-+ goto skip_read;
-+ }
-+ bytes = SQUASHFS_I(inode)->u.s1.fragment_offset +
-+ (i_size_read(inode) & (sblk->block_size
-+ - 1));
-+ byte_offset = SQUASHFS_I(inode)->u.s1.fragment_offset;
-+ data_ptr = fragment->data;
-+ }
-+
-+ for (i = start_index; i <= end_index && byte_offset < bytes;
-+ i++, byte_offset += PAGE_CACHE_SIZE) {
-+ struct page *push_page;
-+ int avail = (bytes - byte_offset) > PAGE_CACHE_SIZE ?
-+ PAGE_CACHE_SIZE : bytes - byte_offset;
-+
-+ TRACE("bytes %d, i %d, byte_offset %d, available_bytes %d\n",
-+ bytes, i, byte_offset, avail);
-+
-+ push_page = (i == page->index) ? page :
-+ grab_cache_page_nowait(page->mapping, i);
-+
-+ if (!push_page)
-+ continue;
-+
-+ if (PageUptodate(push_page))
-+ goto skip_page;
-+
-+ pageaddr = kmap_atomic(push_page, KM_USER0);
-+ memcpy(pageaddr, data_ptr + byte_offset, avail);
-+ memset(pageaddr + avail, 0, PAGE_CACHE_SIZE - avail);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ flush_dcache_page(push_page);
-+ SetPageUptodate(push_page);
-+skip_page:
-+ unlock_page(push_page);
-+ if(i != page->index)
-+ page_cache_release(push_page);
-+ }
-+
-+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
-+ || index < (i_size_read(inode) >>
-+ sblk->block_log))
-+ mutex_unlock(&msblk->read_page_mutex);
-+ else
-+ release_cached_fragment(msblk, fragment);
-+
-+ kfree(block_list);
-+ return 0;
-+
-+skip_read:
-+ pageaddr = kmap_atomic(page, KM_USER0);
-+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ flush_dcache_page(page);
-+ SetPageUptodate(page);
-+ unlock_page(page);
-+
-+ kfree(block_list);
-+ return 0;
-+}
-+
-+
-+static int squashfs_readpage4K(struct file *file, struct page *page)
-+{
-+ struct inode *inode = page->mapping->host;
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned char *block_list;
-+ long long block;
-+ unsigned int bsize, bytes = 0;
-+ void *pageaddr;
-+
-+ TRACE("Entered squashfs_readpage4K, page index %lx, start block %llx\n",
-+ page->index,
-+ SQUASHFS_I(inode)->start_block);
-+
-+ if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
-+ PAGE_CACHE_SHIFT)) {
-+ block_list = NULL;
-+ goto skip_read;
-+ }
-+
-+ if (!(block_list = kmalloc(SIZE, GFP_KERNEL))) {
-+ ERROR("Failed to allocate block_list\n");
-+ goto skip_read;
-+ }
-+
-+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
-+ || page->index < (i_size_read(inode) >>
-+ sblk->block_log)) {
-+ block = (msblk->read_blocklist)(inode, page->index, 1,
-+ block_list, NULL, &bsize);
-+ if(block == 0)
-+ goto skip_read;
-+
-+ mutex_lock(&msblk->read_page_mutex);
-+ bytes = squashfs_read_data(inode->i_sb, msblk->read_page, block,
-+ bsize, NULL, sblk->block_size);
-+ if (bytes) {
-+ pageaddr = kmap_atomic(page, KM_USER0);
-+ memcpy(pageaddr, msblk->read_page, bytes);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ } else
-+ ERROR("Unable to read page, block %llx, size %x\n",
-+ block, bsize);
-+ mutex_unlock(&msblk->read_page_mutex);
-+ } else {
-+ struct squashfs_fragment_cache *fragment =
-+ get_cached_fragment(inode->i_sb,
-+ SQUASHFS_I(inode)->
-+ u.s1.fragment_start_block,
-+ SQUASHFS_I(inode)-> u.s1.fragment_size);
-+ if (fragment) {
-+ bytes = i_size_read(inode) & (sblk->block_size - 1);
-+ pageaddr = kmap_atomic(page, KM_USER0);
-+ memcpy(pageaddr, fragment->data + SQUASHFS_I(inode)->
-+ u.s1.fragment_offset, bytes);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ release_cached_fragment(msblk, fragment);
-+ } else
-+ ERROR("Unable to read page, block %llx, size %x\n",
-+ SQUASHFS_I(inode)->
-+ u.s1.fragment_start_block, (int)
-+ SQUASHFS_I(inode)-> u.s1.fragment_size);
-+ }
-+
-+skip_read:
-+ pageaddr = kmap_atomic(page, KM_USER0);
-+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ flush_dcache_page(page);
-+ SetPageUptodate(page);
-+ unlock_page(page);
-+
-+ kfree(block_list);
-+ return 0;
-+}
-+
-+
-+static int get_dir_index_using_offset(struct super_block *s, long long
-+ *next_block, unsigned int *next_offset,
-+ long long index_start,
-+ unsigned int index_offset, int i_count,
-+ long long f_pos)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int i, length = 0;
-+ struct squashfs_dir_index index;
-+
-+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n",
-+ i_count, (unsigned int) f_pos);
-+
-+ f_pos =- 3;
-+ if (f_pos == 0)
-+ goto finish;
-+
-+ for (i = 0; i < i_count; i++) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_index sindex;
-+ squashfs_get_cached_block(s, (char *) &sindex,
-+ index_start, index_offset,
-+ sizeof(sindex), &index_start,
-+ &index_offset);
-+ SQUASHFS_SWAP_DIR_INDEX(&index, &sindex);
-+ } else
-+ squashfs_get_cached_block(s, (char *) &index,
-+ index_start, index_offset,
-+ sizeof(index), &index_start,
-+ &index_offset);
-+
-+ if (index.index > f_pos)
-+ break;
-+
-+ squashfs_get_cached_block(s, NULL, index_start, index_offset,
-+ index.size + 1, &index_start,
-+ &index_offset);
-+
-+ length = index.index;
-+ *next_block = index.start_block + sblk->directory_table_start;
-+ }
-+
-+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
-+
-+finish:
-+ return length + 3;
-+}
-+
-+
-+static int get_dir_index_using_name(struct super_block *s, long long
-+ *next_block, unsigned int *next_offset,
-+ long long index_start,
-+ unsigned int index_offset, int i_count,
-+ const char *name, int size)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int i, length = 0;
-+ struct squashfs_dir_index *index;
-+ char *str;
-+
-+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
-+
-+ if (!(str = kmalloc(sizeof(struct squashfs_dir_index) +
-+ (SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_index\n");
-+ goto failure;
-+ }
-+
-+ index = (struct squashfs_dir_index *) (str + SQUASHFS_NAME_LEN + 1);
-+ strncpy(str, name, size);
-+ str[size] = '\0';
-+
-+ for (i = 0; i < i_count; i++) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_index sindex;
-+ squashfs_get_cached_block(s, (char *) &sindex,
-+ index_start, index_offset,
-+ sizeof(sindex), &index_start,
-+ &index_offset);
-+ SQUASHFS_SWAP_DIR_INDEX(index, &sindex);
-+ } else
-+ squashfs_get_cached_block(s, (char *) index,
-+ index_start, index_offset,
-+ sizeof(struct squashfs_dir_index),
-+ &index_start, &index_offset);
-+
-+ squashfs_get_cached_block(s, index->name, index_start,
-+ index_offset, index->size + 1,
-+ &index_start, &index_offset);
-+
-+ index->name[index->size + 1] = '\0';
-+
-+ if (strcmp(index->name, str) > 0)
-+ break;
-+
-+ length = index->index;
-+ *next_block = index->start_block + sblk->directory_table_start;
-+ }
-+
-+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
-+ kfree(str);
-+failure:
-+ return length + 3;
-+}
-+
-+
-+static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir)
-+{
-+ struct inode *i = file->f_dentry->d_inode;
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long next_block = SQUASHFS_I(i)->start_block +
-+ sblk->directory_table_start;
-+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
-+ dir_count;
-+ struct squashfs_dir_header dirh;
-+ struct squashfs_dir_entry *dire;
-+
-+ TRACE("Entered squashfs_readdir [%llx:%x]\n", next_block, next_offset);
-+
-+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
-+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_entry\n");
-+ goto finish;
-+ }
-+
-+ while(file->f_pos < 3) {
-+ char *name;
-+ int size, i_ino;
-+
-+ if(file->f_pos == 0) {
-+ name = ".";
-+ size = 1;
-+ i_ino = i->i_ino;
-+ } else {
-+ name = "..";
-+ size = 2;
-+ i_ino = SQUASHFS_I(i)->u.s2.parent_inode;
-+ }
-+ TRACE("Calling filldir(%x, %s, %d, %d, %d, %d)\n",
-+ (unsigned int) dirent, name, size, (int)
-+ file->f_pos, i_ino,
-+ squashfs_filetype_table[1]);
-+
-+ if (filldir(dirent, name, size,
-+ file->f_pos, i_ino,
-+ squashfs_filetype_table[1]) < 0) {
-+ TRACE("Filldir returned less than 0\n");
-+ goto finish;
-+ }
-+ file->f_pos += size;
-+ }
-+
-+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_start,
-+ SQUASHFS_I(i)->u.s2.directory_index_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_count,
-+ file->f_pos);
-+
-+ while (length < i_size_read(i)) {
-+ /* read directory header */
-+ if (msblk->swap) {
-+ struct squashfs_dir_header sdirh;
-+
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
-+ next_block, next_offset, sizeof(sdirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdirh);
-+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
-+ next_block, next_offset, sizeof(dirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(dirh);
-+ }
-+
-+ dir_count = dirh.count + 1;
-+ while (dir_count--) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_entry sdire;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ &sdire, next_block, next_offset,
-+ sizeof(sdire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdire);
-+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ dire, next_block, next_offset,
-+ sizeof(*dire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(*dire);
-+ }
-+
-+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
-+ next_block, next_offset,
-+ dire->size + 1, &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += dire->size + 1;
-+
-+ if (file->f_pos >= length)
-+ continue;
-+
-+ dire->name[dire->size + 1] = '\0';
-+
-+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d, %d)\n",
-+ (unsigned int) dirent, dire->name,
-+ dire->size + 1, (int) file->f_pos,
-+ dirh.start_block, dire->offset,
-+ dirh.inode_number + dire->inode_number,
-+ squashfs_filetype_table[dire->type]);
-+
-+ if (filldir(dirent, dire->name, dire->size + 1,
-+ file->f_pos,
-+ dirh.inode_number + dire->inode_number,
-+ squashfs_filetype_table[dire->type])
-+ < 0) {
-+ TRACE("Filldir returned less than 0\n");
-+ goto finish;
-+ }
-+ file->f_pos = length;
-+ }
-+ }
-+
-+finish:
-+ kfree(dire);
-+ return 0;
-+
-+failed_read:
-+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
-+ next_offset);
-+ kfree(dire);
-+ return 0;
-+}
-+
-+
-+static struct dentry *squashfs_lookup(struct inode *i, struct dentry *dentry,
-+ struct nameidata *nd)
-+{
-+ const unsigned char *name = dentry->d_name.name;
-+ int len = dentry->d_name.len;
-+ struct inode *inode = NULL;
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long next_block = SQUASHFS_I(i)->start_block +
-+ sblk->directory_table_start;
-+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
-+ dir_count;
-+ struct squashfs_dir_header dirh;
-+ struct squashfs_dir_entry *dire;
-+
-+ TRACE("Entered squashfs_lookup [%llx:%x]\n", next_block, next_offset);
-+
-+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
-+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_entry\n");
-+ goto exit_lookup;
-+ }
-+
-+ if (len > SQUASHFS_NAME_LEN)
-+ goto exit_lookup;
-+
-+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_start,
-+ SQUASHFS_I(i)->u.s2.directory_index_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_count, name,
-+ len);
-+
-+ while (length < i_size_read(i)) {
-+ /* read directory header */
-+ if (msblk->swap) {
-+ struct squashfs_dir_header sdirh;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
-+ next_block, next_offset, sizeof(sdirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdirh);
-+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
-+ next_block, next_offset, sizeof(dirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(dirh);
-+ }
-+
-+ dir_count = dirh.count + 1;
-+ while (dir_count--) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_entry sdire;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ &sdire, next_block,next_offset,
-+ sizeof(sdire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdire);
-+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ dire, next_block,next_offset,
-+ sizeof(*dire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(*dire);
-+ }
-+
-+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
-+ next_block, next_offset, dire->size + 1,
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += dire->size + 1;
-+
-+ if (name[0] < dire->name[0])
-+ goto exit_lookup;
-+
-+ if ((len == dire->size + 1) && !strncmp(name, dire->name, len)) {
-+ squashfs_inode_t ino = SQUASHFS_MKINODE(dirh.start_block,
-+ dire->offset);
-+
-+ TRACE("calling squashfs_iget for directory "
-+ "entry %s, inode %x:%x, %d\n", name,
-+ dirh.start_block, dire->offset,
-+ dirh.inode_number + dire->inode_number);
-+
-+ inode = squashfs_iget(i->i_sb, ino, dirh.inode_number + dire->inode_number);
-+
-+ goto exit_lookup;
-+ }
-+ }
-+ }
-+
-+exit_lookup:
-+ kfree(dire);
-+ if (inode)
-+ return d_splice_alias(inode, dentry);
-+ d_add(dentry, inode);
-+ return ERR_PTR(0);
-+
-+failed_read:
-+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
-+ next_offset);
-+ goto exit_lookup;
-+}
-+
-+
-+static int squashfs_remount(struct super_block *s, int *flags, char *data)
-+{
-+ *flags |= MS_RDONLY;
-+ return 0;
-+}
-+
-+
-+static void squashfs_put_super(struct super_block *s)
-+{
-+ int i;
-+
-+ if (s->s_fs_info) {
-+ struct squashfs_sb_info *sbi = s->s_fs_info;
-+ if (sbi->block_cache)
-+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
-+ if (sbi->block_cache[i].block !=
-+ SQUASHFS_INVALID_BLK)
-+ kfree(sbi->block_cache[i].data);
-+ if (sbi->fragment)
-+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++)
-+ SQUASHFS_FREE(sbi->fragment[i].data);
-+ kfree(sbi->fragment);
-+ kfree(sbi->block_cache);
-+ kfree(sbi->read_page);
-+ kfree(sbi->uid);
-+ kfree(sbi->fragment_index);
-+ kfree(sbi->fragment_index_2);
-+ kfree(sbi->meta_index);
-+ vfree(sbi->stream.workspace);
-+ kfree(s->s_fs_info);
-+ s->s_fs_info = NULL;
-+ }
-+}
-+
-+
-+static int squashfs_get_sb(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data,
-+ struct vfsmount *mnt)
-+{
-+ return get_sb_bdev(fs_type, flags, dev_name, data, squashfs_fill_super,
-+ mnt);
-+}
-+
-+
-+static int __init init_squashfs_fs(void)
-+{
-+ int err = init_inodecache();
-+ if (err)
-+ goto out;
-+
-+ printk(KERN_INFO "squashfs: version 3.2-r2 (2007/01/15) "
-+ "Phillip Lougher\n");
-+
-+ if ((err = register_filesystem(&squashfs_fs_type)))
-+ destroy_inodecache();
-+
-+out:
-+ return err;
-+}
-+
-+
-+static void __exit exit_squashfs_fs(void)
-+{
-+ unregister_filesystem(&squashfs_fs_type);
-+ destroy_inodecache();
-+}
-+
-+
-+static struct kmem_cache * squashfs_inode_cachep;
-+
-+
-+static struct inode *squashfs_alloc_inode(struct super_block *sb)
-+{
-+ struct squashfs_inode_info *ei;
-+ ei = kmem_cache_alloc(squashfs_inode_cachep, GFP_KERNEL);
-+ if (!ei)
-+ return NULL;
-+ return &ei->vfs_inode;
-+}
-+
-+
-+static void squashfs_destroy_inode(struct inode *inode)
-+{
-+ kmem_cache_free(squashfs_inode_cachep, SQUASHFS_I(inode));
-+}
-+
-+
-+static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
-+{
-+ struct squashfs_inode_info *ei = foo;
-+
-+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
-+ SLAB_CTOR_CONSTRUCTOR)
-+ inode_init_once(&ei->vfs_inode);
-+}
-+
-+
-+static int __init init_inodecache(void)
-+{
-+ squashfs_inode_cachep = kmem_cache_create("squashfs_inode_cache",
-+ sizeof(struct squashfs_inode_info),
-+ 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
-+ init_once, NULL);
-+ if (squashfs_inode_cachep == NULL)
-+ return -ENOMEM;
-+ return 0;
-+}
-+
-+
-+static void destroy_inodecache(void)
-+{
-+ kmem_cache_destroy(squashfs_inode_cachep);
-+}
-+
-+
-+module_init(init_squashfs_fs);
-+module_exit(exit_squashfs_fs);
-+MODULE_DESCRIPTION("squashfs 3.2-r2, a compressed read-only filesystem");
-+MODULE_AUTHOR("Phillip Lougher <phillip@lougher.org.uk>");
-+MODULE_LICENSE("GPL");
-diff --git a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
-new file mode 100644
-index 0000000..6f863f0
---- /dev/null
-+++ b/fs/squashfs/squashfs.h
-@@ -0,0 +1,87 @@
-+/*
-+ * Squashfs - a compressed read only filesystem for Linux
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs.h
-+ */
-+
-+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
-+#undef CONFIG_SQUASHFS_1_0_COMPATIBILITY
-+#endif
-+
-+#ifdef SQUASHFS_TRACE
-+#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args)
-+#else
-+#define TRACE(s, args...) {}
-+#endif
-+
-+#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args)
-+
-+#define SERROR(s, args...) do { \
-+ if (!silent) \
-+ printk(KERN_ERR "SQUASHFS error: "s, ## args);\
-+ } while(0)
-+
-+#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args)
-+
-+static inline struct squashfs_inode_info *SQUASHFS_I(struct inode *inode)
-+{
-+ return list_entry(inode, struct squashfs_inode_info, vfs_inode);
-+}
-+
-+#if defined(CONFIG_SQUASHFS_1_0_COMPATIBILITY ) || defined(CONFIG_SQUASHFS_2_0_COMPATIBILITY)
-+#define SQSH_EXTERN
-+extern unsigned int squashfs_read_data(struct super_block *s, char *buffer,
-+ long long index, unsigned int length,
-+ long long *next_index, int srclength);
-+extern int squashfs_get_cached_block(struct super_block *s, char *buffer,
-+ long long block, unsigned int offset,
-+ int length, long long *next_block,
-+ unsigned int *next_offset);
-+extern void release_cached_fragment(struct squashfs_sb_info *msblk, struct
-+ squashfs_fragment_cache *fragment);
-+extern struct squashfs_fragment_cache *get_cached_fragment(struct super_block
-+ *s, long long start_block,
-+ int length);
-+extern struct inode *squashfs_iget(struct super_block *s, squashfs_inode_t inode, unsigned int inode_number);
-+extern const struct address_space_operations squashfs_symlink_aops;
-+extern const struct address_space_operations squashfs_aops;
-+extern const struct address_space_operations squashfs_aops_4K;
-+extern struct inode_operations squashfs_dir_inode_ops;
-+#else
-+#define SQSH_EXTERN static
-+#endif
-+
-+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
-+extern int squashfs_1_0_supported(struct squashfs_sb_info *msblk);
-+#else
-+static inline int squashfs_1_0_supported(struct squashfs_sb_info *msblk)
-+{
-+ return 0;
-+}
-+#endif
-+
-+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
-+extern int squashfs_2_0_supported(struct squashfs_sb_info *msblk);
-+#else
-+static inline int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
-+{
-+ return 0;
-+}
-+#endif
-diff --git a/fs/squashfs/squashfs2_0.c b/fs/squashfs/squashfs2_0.c
-new file mode 100644
-index 0000000..d8d9d55
---- /dev/null
-+++ b/fs/squashfs/squashfs2_0.c
-@@ -0,0 +1,742 @@
-+/*
-+ * Squashfs - a compressed read only filesystem for Linux
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs2_0.c
-+ */
-+
-+#include <linux/squashfs_fs.h>
-+#include <linux/module.h>
-+#include <linux/zlib.h>
-+#include <linux/fs.h>
-+#include <linux/squashfs_fs_sb.h>
-+#include <linux/squashfs_fs_i.h>
-+
-+#include "squashfs.h"
-+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir);
-+static struct dentry *squashfs_lookup_2(struct inode *, struct dentry *,
-+ struct nameidata *);
-+
-+static struct file_operations squashfs_dir_ops_2 = {
-+ .read = generic_read_dir,
-+ .readdir = squashfs_readdir_2
-+};
-+
-+static struct inode_operations squashfs_dir_inode_ops_2 = {
-+ .lookup = squashfs_lookup_2
-+};
-+
-+static unsigned char squashfs_filetype_table[] = {
-+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
-+};
-+
-+static int read_fragment_index_table_2(struct super_block *s)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ if (!(msblk->fragment_index_2 = kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES_2
-+ (sblk->fragments), GFP_KERNEL))) {
-+ ERROR("Failed to allocate uid/gid table\n");
-+ return 0;
-+ }
-+
-+ if (SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments) &&
-+ !squashfs_read_data(s, (char *)
-+ msblk->fragment_index_2,
-+ sblk->fragment_table_start,
-+ SQUASHFS_FRAGMENT_INDEX_BYTES_2
-+ (sblk->fragments) |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments))) {
-+ ERROR("unable to read fragment index table\n");
-+ return 0;
-+ }
-+
-+ if (msblk->swap) {
-+ int i;
-+ unsigned int fragment;
-+
-+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES_2(sblk->fragments);
-+ i++) {
-+ SQUASHFS_SWAP_FRAGMENT_INDEXES_2((&fragment),
-+ &msblk->fragment_index_2[i], 1);
-+ msblk->fragment_index_2[i] = fragment;
-+ }
-+ }
-+
-+ return 1;
-+}
-+
-+
-+static int get_fragment_location_2(struct super_block *s, unsigned int fragment,
-+ long long *fragment_start_block,
-+ unsigned int *fragment_size)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ long long start_block =
-+ msblk->fragment_index_2[SQUASHFS_FRAGMENT_INDEX_2(fragment)];
-+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET_2(fragment);
-+ struct squashfs_fragment_entry_2 fragment_entry;
-+
-+ if (msblk->swap) {
-+ struct squashfs_fragment_entry_2 sfragment_entry;
-+
-+ if (!squashfs_get_cached_block(s, (char *) &sfragment_entry,
-+ start_block, offset,
-+ sizeof(sfragment_entry), &start_block,
-+ &offset))
-+ goto out;
-+ SQUASHFS_SWAP_FRAGMENT_ENTRY_2(&fragment_entry, &sfragment_entry);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *) &fragment_entry,
-+ start_block, offset,
-+ sizeof(fragment_entry), &start_block,
-+ &offset))
-+ goto out;
-+
-+ *fragment_start_block = fragment_entry.start_block;
-+ *fragment_size = fragment_entry.size;
-+
-+ return 1;
-+
-+out:
-+ return 0;
-+}
-+
-+
-+static void squashfs_new_inode(struct squashfs_sb_info *msblk, struct inode *i,
-+ struct squashfs_base_inode_header_2 *inodeb, unsigned int ino)
-+{
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ i->i_ino = ino;
-+ i->i_mtime.tv_sec = sblk->mkfs_time;
-+ i->i_atime.tv_sec = sblk->mkfs_time;
-+ i->i_ctime.tv_sec = sblk->mkfs_time;
-+ i->i_uid = msblk->uid[inodeb->uid];
-+ i->i_mode = inodeb->mode;
-+ i->i_nlink = 1;
-+ i->i_size = 0;
-+ if (inodeb->guid == SQUASHFS_GUIDS)
-+ i->i_gid = i->i_uid;
-+ else
-+ i->i_gid = msblk->guid[inodeb->guid];
-+}
-+
-+
-+static int squashfs_read_inode_2(struct inode *i, squashfs_inode_t inode)
-+{
-+ struct super_block *s = i->i_sb;
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned int block = SQUASHFS_INODE_BLK(inode) +
-+ sblk->inode_table_start;
-+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
-+ unsigned int ino = i->i_ino;
-+ long long next_block;
-+ unsigned int next_offset;
-+ union squashfs_inode_header_2 id, sid;
-+ struct squashfs_base_inode_header_2 *inodeb = &id.base,
-+ *sinodeb = &sid.base;
-+
-+ TRACE("Entered squashfs_iget\n");
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *) sinodeb, block,
-+ offset, sizeof(*sinodeb), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(inodeb, sinodeb,
-+ sizeof(*sinodeb));
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *) inodeb, block,
-+ offset, sizeof(*inodeb), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ squashfs_new_inode(msblk, i, inodeb, ino);
-+
-+ switch(inodeb->inode_type) {
-+ case SQUASHFS_FILE_TYPE: {
-+ struct squashfs_reg_inode_header_2 *inodep = &id.reg;
-+ struct squashfs_reg_inode_header_2 *sinodep = &sid.reg;
-+ long long frag_blk;
-+ unsigned int frag_size = 0;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_REG_INODE_HEADER_2(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ frag_blk = SQUASHFS_INVALID_BLK;
-+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
-+ !get_fragment_location_2(s,
-+ inodep->fragment, &frag_blk, &frag_size))
-+ goto failed_read;
-+
-+ i->i_size = inodep->file_size;
-+ i->i_fop = &generic_ro_fops;
-+ i->i_mode |= S_IFREG;
-+ i->i_mtime.tv_sec = inodep->mtime;
-+ i->i_atime.tv_sec = inodep->mtime;
-+ i->i_ctime.tv_sec = inodep->mtime;
-+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
-+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
-+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
-+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+ if (sblk->block_size > 4096)
-+ i->i_data.a_ops = &squashfs_aops;
-+ else
-+ i->i_data.a_ops = &squashfs_aops_4K;
-+
-+ TRACE("File inode %x:%x, start_block %x, "
-+ "block_list_start %llx, offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, next_block,
-+ next_offset);
-+ break;
-+ }
-+ case SQUASHFS_DIR_TYPE: {
-+ struct squashfs_dir_inode_header_2 *inodep = &id.dir;
-+ struct squashfs_dir_inode_header_2 *sinodep = &sid.dir;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_DIR_INODE_HEADER_2(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_size = inodep->file_size;
-+ i->i_op = &squashfs_dir_inode_ops_2;
-+ i->i_fop = &squashfs_dir_ops_2;
-+ i->i_mode |= S_IFDIR;
-+ i->i_mtime.tv_sec = inodep->mtime;
-+ i->i_atime.tv_sec = inodep->mtime;
-+ i->i_ctime.tv_sec = inodep->mtime;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->offset = inodep->offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_count = 0;
-+ SQUASHFS_I(i)->u.s2.parent_inode = 0;
-+
-+ TRACE("Directory inode %x:%x, start_block %x, offset "
-+ "%x\n", SQUASHFS_INODE_BLK(inode),
-+ offset, inodep->start_block,
-+ inodep->offset);
-+ break;
-+ }
-+ case SQUASHFS_LDIR_TYPE: {
-+ struct squashfs_ldir_inode_header_2 *inodep = &id.ldir;
-+ struct squashfs_ldir_inode_header_2 *sinodep = &sid.ldir;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_LDIR_INODE_HEADER_2(inodep,
-+ sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_size = inodep->file_size;
-+ i->i_op = &squashfs_dir_inode_ops_2;
-+ i->i_fop = &squashfs_dir_ops_2;
-+ i->i_mode |= S_IFDIR;
-+ i->i_mtime.tv_sec = inodep->mtime;
-+ i->i_atime.tv_sec = inodep->mtime;
-+ i->i_ctime.tv_sec = inodep->mtime;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->offset = inodep->offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
-+ SQUASHFS_I(i)->u.s2.directory_index_offset =
-+ next_offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_count =
-+ inodep->i_count;
-+ SQUASHFS_I(i)->u.s2.parent_inode = 0;
-+
-+ TRACE("Long directory inode %x:%x, start_block %x, "
-+ "offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, inodep->offset);
-+ break;
-+ }
-+ case SQUASHFS_SYMLINK_TYPE: {
-+ struct squashfs_symlink_inode_header_2 *inodep =
-+ &id.symlink;
-+ struct squashfs_symlink_inode_header_2 *sinodep =
-+ &sid.symlink;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(inodep,
-+ sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_size = inodep->symlink_size;
-+ i->i_op = &page_symlink_inode_operations;
-+ i->i_data.a_ops = &squashfs_symlink_aops;
-+ i->i_mode |= S_IFLNK;
-+ SQUASHFS_I(i)->start_block = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+
-+ TRACE("Symbolic link inode %x:%x, start_block %llx, "
-+ "offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ next_block, next_offset);
-+ break;
-+ }
-+ case SQUASHFS_BLKDEV_TYPE:
-+ case SQUASHFS_CHRDEV_TYPE: {
-+ struct squashfs_dev_inode_header_2 *inodep = &id.dev;
-+ struct squashfs_dev_inode_header_2 *sinodep = &sid.dev;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_DEV_INODE_HEADER_2(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_mode |= (inodeb->inode_type ==
-+ SQUASHFS_CHRDEV_TYPE) ? S_IFCHR :
-+ S_IFBLK;
-+ init_special_inode(i, i->i_mode,
-+ old_decode_dev(inodep->rdev));
-+
-+ TRACE("Device inode %x:%x, rdev %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->rdev);
-+ break;
-+ }
-+ case SQUASHFS_FIFO_TYPE:
-+ case SQUASHFS_SOCKET_TYPE: {
-+
-+ i->i_mode |= (inodeb->inode_type == SQUASHFS_FIFO_TYPE)
-+ ? S_IFIFO : S_IFSOCK;
-+ init_special_inode(i, i->i_mode, 0);
-+ break;
-+ }
-+ default:
-+ ERROR("Unknown inode type %d in squashfs_iget!\n",
-+ inodeb->inode_type);
-+ goto failed_read1;
-+ }
-+
-+ return 1;
-+
-+failed_read:
-+ ERROR("Unable to read inode [%x:%x]\n", block, offset);
-+
-+failed_read1:
-+ return 0;
-+}
-+
-+
-+static int get_dir_index_using_offset(struct super_block *s, long long
-+ *next_block, unsigned int *next_offset,
-+ long long index_start,
-+ unsigned int index_offset, int i_count,
-+ long long f_pos)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int i, length = 0;
-+ struct squashfs_dir_index_2 index;
-+
-+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n",
-+ i_count, (unsigned int) f_pos);
-+
-+ if (f_pos == 0)
-+ goto finish;
-+
-+ for (i = 0; i < i_count; i++) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_index_2 sindex;
-+ squashfs_get_cached_block(s, (char *) &sindex,
-+ index_start, index_offset,
-+ sizeof(sindex), &index_start,
-+ &index_offset);
-+ SQUASHFS_SWAP_DIR_INDEX_2(&index, &sindex);
-+ } else
-+ squashfs_get_cached_block(s, (char *) &index,
-+ index_start, index_offset,
-+ sizeof(index), &index_start,
-+ &index_offset);
-+
-+ if (index.index > f_pos)
-+ break;
-+
-+ squashfs_get_cached_block(s, NULL, index_start, index_offset,
-+ index.size + 1, &index_start,
-+ &index_offset);
-+
-+ length = index.index;
-+ *next_block = index.start_block + sblk->directory_table_start;
-+ }
-+
-+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
-+
-+finish:
-+ return length;
-+}
-+
-+
-+static int get_dir_index_using_name(struct super_block *s, long long
-+ *next_block, unsigned int *next_offset,
-+ long long index_start,
-+ unsigned int index_offset, int i_count,
-+ const char *name, int size)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int i, length = 0;
-+ struct squashfs_dir_index_2 *index;
-+ char *str;
-+
-+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
-+
-+ if (!(str = kmalloc(sizeof(struct squashfs_dir_index) +
-+ (SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_index\n");
-+ goto failure;
-+ }
-+
-+ index = (struct squashfs_dir_index_2 *) (str + SQUASHFS_NAME_LEN + 1);
-+ strncpy(str, name, size);
-+ str[size] = '\0';
-+
-+ for (i = 0; i < i_count; i++) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_index_2 sindex;
-+ squashfs_get_cached_block(s, (char *) &sindex,
-+ index_start, index_offset,
-+ sizeof(sindex), &index_start,
-+ &index_offset);
-+ SQUASHFS_SWAP_DIR_INDEX_2(index, &sindex);
-+ } else
-+ squashfs_get_cached_block(s, (char *) index,
-+ index_start, index_offset,
-+ sizeof(struct squashfs_dir_index_2),
-+ &index_start, &index_offset);
-+
-+ squashfs_get_cached_block(s, index->name, index_start,
-+ index_offset, index->size + 1,
-+ &index_start, &index_offset);
-+
-+ index->name[index->size + 1] = '\0';
-+
-+ if (strcmp(index->name, str) > 0)
-+ break;
-+
-+ length = index->index;
-+ *next_block = index->start_block + sblk->directory_table_start;
-+ }
-+
-+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
-+ kfree(str);
-+failure:
-+ return length;
-+}
-+
-+
-+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir)
-+{
-+ struct inode *i = file->f_dentry->d_inode;
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long next_block = SQUASHFS_I(i)->start_block +
-+ sblk->directory_table_start;
-+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
-+ dir_count;
-+ struct squashfs_dir_header_2 dirh;
-+ struct squashfs_dir_entry_2 *dire;
-+
-+ TRACE("Entered squashfs_readdir_2 [%llx:%x]\n", next_block, next_offset);
-+
-+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
-+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_entry\n");
-+ goto finish;
-+ }
-+
-+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_start,
-+ SQUASHFS_I(i)->u.s2.directory_index_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_count,
-+ file->f_pos);
-+
-+ while (length < i_size_read(i)) {
-+ /* read directory header */
-+ if (msblk->swap) {
-+ struct squashfs_dir_header_2 sdirh;
-+
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
-+ next_block, next_offset, sizeof(sdirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdirh);
-+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
-+ next_block, next_offset, sizeof(dirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(dirh);
-+ }
-+
-+ dir_count = dirh.count + 1;
-+ while (dir_count--) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_entry_2 sdire;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ &sdire, next_block, next_offset,
-+ sizeof(sdire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdire);
-+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ dire, next_block, next_offset,
-+ sizeof(*dire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(*dire);
-+ }
-+
-+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
-+ next_block, next_offset,
-+ dire->size + 1, &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += dire->size + 1;
-+
-+ if (file->f_pos >= length)
-+ continue;
-+
-+ dire->name[dire->size + 1] = '\0';
-+
-+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d)\n",
-+ (unsigned int) dirent, dire->name,
-+ dire->size + 1, (int) file->f_pos,
-+ dirh.start_block, dire->offset,
-+ squashfs_filetype_table[dire->type]);
-+
-+ if (filldir(dirent, dire->name, dire->size + 1,
-+ file->f_pos, SQUASHFS_MK_VFS_INODE(
-+ dirh.start_block, dire->offset),
-+ squashfs_filetype_table[dire->type])
-+ < 0) {
-+ TRACE("Filldir returned less than 0\n");
-+ goto finish;
-+ }
-+ file->f_pos = length;
-+ }
-+ }
-+
-+finish:
-+ kfree(dire);
-+ return 0;
-+
-+failed_read:
-+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
-+ next_offset);
-+ kfree(dire);
-+ return 0;
-+}
-+
-+
-+static struct dentry *squashfs_lookup_2(struct inode *i, struct dentry *dentry,
-+ struct nameidata *nd)
-+{
-+ const unsigned char *name = dentry->d_name.name;
-+ int len = dentry->d_name.len;
-+ struct inode *inode = NULL;
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long next_block = SQUASHFS_I(i)->start_block +
-+ sblk->directory_table_start;
-+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
-+ dir_count;
-+ struct squashfs_dir_header_2 dirh;
-+ struct squashfs_dir_entry_2 *dire;
-+ int sorted = sblk->s_major == 2 && sblk->s_minor >= 1;
-+
-+ TRACE("Entered squashfs_lookup_2 [%llx:%x]\n", next_block, next_offset);
-+
-+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
-+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_entry\n");
-+ goto exit_loop;
-+ }
-+
-+ if (len > SQUASHFS_NAME_LEN)
-+ goto exit_loop;
-+
-+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_start,
-+ SQUASHFS_I(i)->u.s2.directory_index_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_count, name,
-+ len);
-+
-+ while (length < i_size_read(i)) {
-+ /* read directory header */
-+ if (msblk->swap) {
-+ struct squashfs_dir_header_2 sdirh;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
-+ next_block, next_offset, sizeof(sdirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdirh);
-+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
-+ next_block, next_offset, sizeof(dirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(dirh);
-+ }
-+
-+ dir_count = dirh.count + 1;
-+ while (dir_count--) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_entry_2 sdire;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ &sdire, next_block,next_offset,
-+ sizeof(sdire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdire);
-+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ dire, next_block,next_offset,
-+ sizeof(*dire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(*dire);
-+ }
-+
-+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
-+ next_block, next_offset, dire->size + 1,
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += dire->size + 1;
-+
-+ if (sorted && name[0] < dire->name[0])
-+ goto exit_loop;
-+
-+ if ((len == dire->size + 1) && !strncmp(name,
-+ dire->name, len)) {
-+ squashfs_inode_t ino =
-+ SQUASHFS_MKINODE(dirh.start_block,
-+ dire->offset);
-+ unsigned int inode_number = SQUASHFS_MK_VFS_INODE(dirh.start_block,
-+ dire->offset);
-+
-+ TRACE("calling squashfs_iget for directory "
-+ "entry %s, inode %x:%x, %lld\n", name,
-+ dirh.start_block, dire->offset, ino);
-+
-+ inode = squashfs_iget(i->i_sb, ino, inode_number);
-+
-+ goto exit_loop;
-+ }
-+ }
-+ }
-+
-+exit_loop:
-+ kfree(dire);
-+ d_add(dentry, inode);
-+ return ERR_PTR(0);
-+
-+failed_read:
-+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
-+ next_offset);
-+ goto exit_loop;
-+}
-+
-+
-+int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
-+{
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ msblk->read_inode = squashfs_read_inode_2;
-+ msblk->read_fragment_index_table = read_fragment_index_table_2;
-+
-+ sblk->bytes_used = sblk->bytes_used_2;
-+ sblk->uid_start = sblk->uid_start_2;
-+ sblk->guid_start = sblk->guid_start_2;
-+ sblk->inode_table_start = sblk->inode_table_start_2;
-+ sblk->directory_table_start = sblk->directory_table_start_2;
-+ sblk->fragment_table_start = sblk->fragment_table_start_2;
-+
-+ return 1;
-+}
-diff --git a/include/linux/aufs_type.h b/include/linux/aufs_type.h
-new file mode 100755
-index 0000000..8b4629e
---- /dev/null
-+++ b/include/linux/aufs_type.h
-@@ -0,0 +1,97 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: aufs_type.h,v 1.55 2007/05/14 03:40:57 sfjro Exp $ */
-+
-+#include <linux/ioctl.h>
-+
-+#ifndef __AUFS_TYPE_H__
-+#define __AUFS_TYPE_H__
-+
-+#define AUFS_VERSION "20070514"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_BRANCH_MAX_127
-+typedef char aufs_bindex_t;
-+#define AUFS_BRANCH_MAX 127
-+#else
-+typedef short aufs_bindex_t;
-+#ifdef CONFIG_AUFS_BRANCH_MAX_511
-+#define AUFS_BRANCH_MAX 511
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_1023)
-+#define AUFS_BRANCH_MAX 1023
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_32767)
-+#define AUFS_BRANCH_MAX 32767
-+#else
-+#error unknown CONFIG_AUFS_BRANCH_MAX value
-+#endif
-+#endif
-+
-+#define AUFS_NAME "aufs"
-+#define AUFS_FSTYPE AUFS_NAME
-+
-+#define AUFS_ROOT_INO 2
-+#define AUFS_FIRST_INO 11
-+
-+#define AUFS_WH_PFX ".wh."
-+#define AUFS_WH_PFX_LEN ((int)sizeof(AUFS_WH_PFX) - 1)
-+#define AUFS_XINO_FNAME "." AUFS_NAME ".xino"
-+#define AUFS_XINO_DEFPATH "/tmp/" AUFS_XINO_FNAME
-+#define AUFS_DIRWH_DEF 3
-+#define AUFS_RDCACHE_DEF 10 /* seconds */
-+#define AUFS_WKQ_NAME AUFS_NAME "d"
-+#define AUFS_NWKQ_DEF 4
-+
-+#ifdef CONFIG_AUFS_COMPAT
-+#define AUFS_DIROPQ_NAME "__dir_opaque"
-+#else
-+#define AUFS_DIROPQ_NAME AUFS_WH_PFX ".opq" /* whiteouted doubly */
-+#endif
-+#define AUFS_WH_DIROPQ AUFS_WH_PFX AUFS_DIROPQ_NAME
-+
-+/* will be whiteouted doubly */
-+#define AUFS_WH_BASENAME AUFS_WH_PFX AUFS_NAME
-+#define AUFS_WH_PLINKDIR AUFS_WH_PFX "plink"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* ioctl */
-+enum {AuCtlErr, AuCtlErr_Last};
-+enum {
-+ AuCtl_REFRESH, //AuCtl_REFRESHV,
-+ //AuCtl_FLUSH_PLINK,
-+ //AuCtl_CPUP,
-+ AuCtl_CPDOWN, AuCtl_MVDOWN
-+};
-+
-+struct aufs_ctl_cp {
-+ int bsrc, bdst;
-+ int err;
-+};
-+
-+#define Type 'A'
-+#define AUFS_CTL_REFRESH _IO(Type, AuCtl_REFRESH)
-+//#define AUFS_CTL_REFRESHV _IO(Type, AuCtl_REFRESHV)
-+//#define AUFS_CTL_FLUSH_PLINK _IOR(Type, AuCtl_FLUSH_PLINK)
-+//#define AUFS_CTL_CPUP _IOWR(Type, AuCtl_CPUP, struct aufs_ctl_cp)
-+#define AUFS_CTL_CPDOWN _IOWR(Type, AuCtl_CPDOWN, struct aufs_ctl_cp)
-+#define AUFS_CTL_MVDOWN _IOWR(Type, AuCtl_MVDOWN, struct aufs_ctl_cp)
-+#undef Type
-+
-+#endif /* __AUFS_TYPE_H__ */
-diff --git a/include/linux/squashfs_fs.h b/include/linux/squashfs_fs.h
-new file mode 100644
-index 0000000..a9380ad
---- /dev/null
-+++ b/include/linux/squashfs_fs.h
-@@ -0,0 +1,934 @@
-+#ifndef SQUASHFS_FS
-+#define SQUASHFS_FS
-+
-+/*
-+ * Squashfs
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs_fs.h
-+ */
-+
-+#ifndef CONFIG_SQUASHFS_2_0_COMPATIBILITY
-+#define CONFIG_SQUASHFS_2_0_COMPATIBILITY
-+#endif
-+
-+#ifdef CONFIG_SQUASHFS_VMALLOC
-+#define SQUASHFS_ALLOC(a) vmalloc(a)
-+#define SQUASHFS_FREE(a) vfree(a)
-+#else
-+#define SQUASHFS_ALLOC(a) kmalloc(a, GFP_KERNEL)
-+#define SQUASHFS_FREE(a) kfree(a)
-+#endif
-+#define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
-+#define SQUASHFS_MAJOR 3
-+#define SQUASHFS_MINOR 0
-+#define SQUASHFS_MAGIC 0x73717368
-+#define SQUASHFS_MAGIC_SWAP 0x68737173
-+#define SQUASHFS_START 0
-+
-+/* size of metadata (inode and directory) blocks */
-+#define SQUASHFS_METADATA_SIZE 8192
-+#define SQUASHFS_METADATA_LOG 13
-+
-+/* default size of data blocks */
-+#define SQUASHFS_FILE_SIZE 65536
-+#define SQUASHFS_FILE_LOG 16
-+
-+#define SQUASHFS_FILE_MAX_SIZE 65536
-+
-+/* Max number of uids and gids */
-+#define SQUASHFS_UIDS 256
-+#define SQUASHFS_GUIDS 255
-+
-+/* Max length of filename (not 255) */
-+#define SQUASHFS_NAME_LEN 256
-+
-+#define SQUASHFS_INVALID ((long long) 0xffffffffffff)
-+#define SQUASHFS_INVALID_FRAG ((unsigned int) 0xffffffff)
-+#define SQUASHFS_INVALID_BLK ((long long) -1)
-+#define SQUASHFS_USED_BLK ((long long) -2)
-+
-+/* Filesystem flags */
-+#define SQUASHFS_NOI 0
-+#define SQUASHFS_NOD 1
-+#define SQUASHFS_CHECK 2
-+#define SQUASHFS_NOF 3
-+#define SQUASHFS_NO_FRAG 4
-+#define SQUASHFS_ALWAYS_FRAG 5
-+#define SQUASHFS_DUPLICATE 6
-+#define SQUASHFS_EXPORT 7
-+
-+#define SQUASHFS_BIT(flag, bit) ((flag >> bit) & 1)
-+
-+#define SQUASHFS_UNCOMPRESSED_INODES(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_NOI)
-+
-+#define SQUASHFS_UNCOMPRESSED_DATA(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_NOD)
-+
-+#define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_NOF)
-+
-+#define SQUASHFS_NO_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_NO_FRAG)
-+
-+#define SQUASHFS_ALWAYS_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_ALWAYS_FRAG)
-+
-+#define SQUASHFS_DUPLICATES(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_DUPLICATE)
-+
-+#define SQUASHFS_EXPORTABLE(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_EXPORT)
-+
-+#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_CHECK)
-+
-+#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, \
-+ duplicate_checking, exortable) (noi | (nod << 1) | (check_data << 2) \
-+ | (nof << 3) | (no_frag << 4) | (always_frag << 5) | \
-+ (duplicate_checking << 6) | (exportable << 7))
-+
-+/* Max number of types and file types */
-+#define SQUASHFS_DIR_TYPE 1
-+#define SQUASHFS_FILE_TYPE 2
-+#define SQUASHFS_SYMLINK_TYPE 3
-+#define SQUASHFS_BLKDEV_TYPE 4
-+#define SQUASHFS_CHRDEV_TYPE 5
-+#define SQUASHFS_FIFO_TYPE 6
-+#define SQUASHFS_SOCKET_TYPE 7
-+#define SQUASHFS_LDIR_TYPE 8
-+#define SQUASHFS_LREG_TYPE 9
-+
-+/* 1.0 filesystem type definitions */
-+#define SQUASHFS_TYPES 5
-+#define SQUASHFS_IPC_TYPE 0
-+
-+/* Flag whether block is compressed or uncompressed, bit is set if block is
-+ * uncompressed */
-+#define SQUASHFS_COMPRESSED_BIT (1 << 15)
-+
-+#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \
-+ (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT)
-+
-+#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT))
-+
-+#define SQUASHFS_COMPRESSED_BIT_BLOCK (1 << 24)
-+
-+#define SQUASHFS_COMPRESSED_SIZE_BLOCK(B) (((B) & \
-+ ~SQUASHFS_COMPRESSED_BIT_BLOCK) ? (B) & \
-+ ~SQUASHFS_COMPRESSED_BIT_BLOCK : SQUASHFS_COMPRESSED_BIT_BLOCK)
-+
-+#define SQUASHFS_COMPRESSED_BLOCK(B) (!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK))
-+
-+/*
-+ * Inode number ops. Inodes consist of a compressed block number, and an
-+ * uncompressed offset within that block
-+ */
-+#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16))
-+
-+#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff))
-+
-+#define SQUASHFS_MKINODE(A, B) ((squashfs_inode_t)(((squashfs_inode_t) (A)\
-+ << 16) + (B)))
-+
-+/* Compute 32 bit VFS inode number from squashfs inode number */
-+#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + \
-+ ((b) >> 2) + 1))
-+/* XXX */
-+
-+/* Translate between VFS mode and squashfs mode */
-+#define SQUASHFS_MODE(a) ((a) & 0xfff)
-+
-+/* fragment and fragment table defines */
-+#define SQUASHFS_FRAGMENT_BYTES(A) ((A) * sizeof(struct squashfs_fragment_entry))
-+
-+#define SQUASHFS_FRAGMENT_INDEX(A) (SQUASHFS_FRAGMENT_BYTES(A) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEX_OFFSET(A) (SQUASHFS_FRAGMENT_BYTES(A) % \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEXES(A) ((SQUASHFS_FRAGMENT_BYTES(A) + \
-+ SQUASHFS_METADATA_SIZE - 1) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEX_BYTES(A) (SQUASHFS_FRAGMENT_INDEXES(A) *\
-+ sizeof(long long))
-+
-+/* inode lookup table defines */
-+#define SQUASHFS_LOOKUP_BYTES(A) ((A) * sizeof(squashfs_inode_t))
-+
-+#define SQUASHFS_LOOKUP_BLOCK(A) (SQUASHFS_LOOKUP_BYTES(A) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_LOOKUP_BLOCK_OFFSET(A) (SQUASHFS_LOOKUP_BYTES(A) % \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_LOOKUP_BLOCKS(A) ((SQUASHFS_LOOKUP_BYTES(A) + \
-+ SQUASHFS_METADATA_SIZE - 1) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_LOOKUP_BLOCK_BYTES(A) (SQUASHFS_LOOKUP_BLOCKS(A) *\
-+ sizeof(long long))
-+
-+/* cached data constants for filesystem */
-+#define SQUASHFS_CACHED_BLKS 8
-+
-+#define SQUASHFS_MAX_FILE_SIZE_LOG 64
-+
-+#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << \
-+ (SQUASHFS_MAX_FILE_SIZE_LOG - 2))
-+
-+#define SQUASHFS_MARKER_BYTE 0xff
-+
-+/* meta index cache */
-+#define SQUASHFS_META_INDEXES (SQUASHFS_METADATA_SIZE / sizeof(unsigned int))
-+#define SQUASHFS_META_ENTRIES 31
-+#define SQUASHFS_META_NUMBER 8
-+#define SQUASHFS_SLOTS 4
-+
-+struct meta_entry {
-+ long long data_block;
-+ unsigned int index_block;
-+ unsigned short offset;
-+ unsigned short pad;
-+};
-+
-+struct meta_index {
-+ unsigned int inode_number;
-+ unsigned int offset;
-+ unsigned short entries;
-+ unsigned short skip;
-+ unsigned short locked;
-+ unsigned short pad;
-+ struct meta_entry meta_entry[SQUASHFS_META_ENTRIES];
-+};
-+
-+
-+/*
-+ * definitions for structures on disk
-+ */
-+
-+typedef long long squashfs_block_t;
-+typedef long long squashfs_inode_t;
-+
-+struct squashfs_super_block {
-+ unsigned int s_magic;
-+ unsigned int inodes;
-+ unsigned int bytes_used_2;
-+ unsigned int uid_start_2;
-+ unsigned int guid_start_2;
-+ unsigned int inode_table_start_2;
-+ unsigned int directory_table_start_2;
-+ unsigned int s_major:16;
-+ unsigned int s_minor:16;
-+ unsigned int block_size_1:16;
-+ unsigned int block_log:16;
-+ unsigned int flags:8;
-+ unsigned int no_uids:8;
-+ unsigned int no_guids:8;
-+ unsigned int mkfs_time /* time of filesystem creation */;
-+ squashfs_inode_t root_inode;
-+ unsigned int block_size;
-+ unsigned int fragments;
-+ unsigned int fragment_table_start_2;
-+ long long bytes_used;
-+ long long uid_start;
-+ long long guid_start;
-+ long long inode_table_start;
-+ long long directory_table_start;
-+ long long fragment_table_start;
-+ long long lookup_table_start;
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_index {
-+ unsigned int index;
-+ unsigned int start_block;
-+ unsigned char size;
-+ unsigned char name[0];
-+} __attribute__ ((packed));
-+
-+#define SQUASHFS_BASE_INODE_HEADER \
-+ unsigned int inode_type:4; \
-+ unsigned int mode:12; \
-+ unsigned int uid:8; \
-+ unsigned int guid:8; \
-+ unsigned int mtime; \
-+ unsigned int inode_number;
-+
-+struct squashfs_base_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+} __attribute__ ((packed));
-+
-+struct squashfs_ipc_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+} __attribute__ ((packed));
-+
-+struct squashfs_dev_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ unsigned short rdev;
-+} __attribute__ ((packed));
-+
-+struct squashfs_symlink_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ unsigned short symlink_size;
-+ char symlink[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_reg_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ squashfs_block_t start_block;
-+ unsigned int fragment;
-+ unsigned int offset;
-+ unsigned int file_size;
-+ unsigned short block_list[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_lreg_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ squashfs_block_t start_block;
-+ unsigned int fragment;
-+ unsigned int offset;
-+ long long file_size;
-+ unsigned short block_list[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ unsigned int file_size:19;
-+ unsigned int offset:13;
-+ unsigned int start_block;
-+ unsigned int parent_inode;
-+} __attribute__ ((packed));
-+
-+struct squashfs_ldir_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ unsigned int file_size:27;
-+ unsigned int offset:13;
-+ unsigned int start_block;
-+ unsigned int i_count:16;
-+ unsigned int parent_inode;
-+ struct squashfs_dir_index index[0];
-+} __attribute__ ((packed));
-+
-+union squashfs_inode_header {
-+ struct squashfs_base_inode_header base;
-+ struct squashfs_dev_inode_header dev;
-+ struct squashfs_symlink_inode_header symlink;
-+ struct squashfs_reg_inode_header reg;
-+ struct squashfs_lreg_inode_header lreg;
-+ struct squashfs_dir_inode_header dir;
-+ struct squashfs_ldir_inode_header ldir;
-+ struct squashfs_ipc_inode_header ipc;
-+};
-+
-+struct squashfs_dir_entry {
-+ unsigned int offset:13;
-+ unsigned int type:3;
-+ unsigned int size:8;
-+ int inode_number:16;
-+ char name[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_header {
-+ unsigned int count:8;
-+ unsigned int start_block;
-+ unsigned int inode_number;
-+} __attribute__ ((packed));
-+
-+struct squashfs_fragment_entry {
-+ long long start_block;
-+ unsigned int size;
-+ unsigned int pending;
-+} __attribute__ ((packed));
-+
-+extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen);
-+extern int squashfs_uncompress_init(void);
-+extern int squashfs_uncompress_exit(void);
-+
-+/*
-+ * macros to convert each packed bitfield structure from little endian to big
-+ * endian and vice versa. These are needed when creating or using a filesystem
-+ * on a machine with different byte ordering to the target architecture.
-+ *
-+ */
-+
-+#define SQUASHFS_SWAP_START \
-+ int bits;\
-+ int b_pos;\
-+ unsigned long long val;\
-+ unsigned char *s;\
-+ unsigned char *d;
-+
-+#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_super_block));\
-+ SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\
-+ SQUASHFS_SWAP((s)->inodes, d, 32, 32);\
-+ SQUASHFS_SWAP((s)->bytes_used_2, d, 64, 32);\
-+ SQUASHFS_SWAP((s)->uid_start_2, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->guid_start_2, d, 128, 32);\
-+ SQUASHFS_SWAP((s)->inode_table_start_2, d, 160, 32);\
-+ SQUASHFS_SWAP((s)->directory_table_start_2, d, 192, 32);\
-+ SQUASHFS_SWAP((s)->s_major, d, 224, 16);\
-+ SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\
-+ SQUASHFS_SWAP((s)->block_size_1, d, 256, 16);\
-+ SQUASHFS_SWAP((s)->block_log, d, 272, 16);\
-+ SQUASHFS_SWAP((s)->flags, d, 288, 8);\
-+ SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\
-+ SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\
-+ SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\
-+ SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\
-+ SQUASHFS_SWAP((s)->block_size, d, 408, 32);\
-+ SQUASHFS_SWAP((s)->fragments, d, 440, 32);\
-+ SQUASHFS_SWAP((s)->fragment_table_start_2, d, 472, 32);\
-+ SQUASHFS_SWAP((s)->bytes_used, d, 504, 64);\
-+ SQUASHFS_SWAP((s)->uid_start, d, 568, 64);\
-+ SQUASHFS_SWAP((s)->guid_start, d, 632, 64);\
-+ SQUASHFS_SWAP((s)->inode_table_start, d, 696, 64);\
-+ SQUASHFS_SWAP((s)->directory_table_start, d, 760, 64);\
-+ SQUASHFS_SWAP((s)->fragment_table_start, d, 824, 64);\
-+ SQUASHFS_SWAP((s)->lookup_table_start, d, 888, 64);\
-+}
-+
-+#define SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
-+ SQUASHFS_MEMSET(s, d, n);\
-+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
-+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
-+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
-+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
-+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
-+ SQUASHFS_SWAP((s)->inode_number, d, 64, 32);
-+
-+#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
-+}
-+
-+#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_ipc_inode_header))\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_dev_inode_header)); \
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->rdev, d, 128, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_symlink_inode_header));\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->symlink_size, d, 128, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_reg_inode_header));\
-+ SQUASHFS_SWAP((s)->start_block, d, 96, 64);\
-+ SQUASHFS_SWAP((s)->fragment, d, 160, 32);\
-+ SQUASHFS_SWAP((s)->offset, d, 192, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 224, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_LREG_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_lreg_inode_header));\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 128, 64);\
-+ SQUASHFS_SWAP((s)->fragment, d, 192, 32);\
-+ SQUASHFS_SWAP((s)->offset, d, 224, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 256, 64);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_dir_inode_header));\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 128, 19);\
-+ SQUASHFS_SWAP((s)->offset, d, 147, 13);\
-+ SQUASHFS_SWAP((s)->start_block, d, 160, 32);\
-+ SQUASHFS_SWAP((s)->parent_inode, d, 192, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_LDIR_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_ldir_inode_header));\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 128, 27);\
-+ SQUASHFS_SWAP((s)->offset, d, 155, 13);\
-+ SQUASHFS_SWAP((s)->start_block, d, 168, 32);\
-+ SQUASHFS_SWAP((s)->i_count, d, 200, 16);\
-+ SQUASHFS_SWAP((s)->parent_inode, d, 216, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INDEX(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index));\
-+ SQUASHFS_SWAP((s)->index, d, 0, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 32, 32);\
-+ SQUASHFS_SWAP((s)->size, d, 64, 8);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header));\
-+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
-+ SQUASHFS_SWAP((s)->start_block, d, 8, 32);\
-+ SQUASHFS_SWAP((s)->inode_number, d, 40, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry));\
-+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
-+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
-+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
-+ SQUASHFS_SWAP((s)->inode_number, d, 24, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_FRAGMENT_ENTRY(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry));\
-+ SQUASHFS_SWAP((s)->start_block, d, 0, 64);\
-+ SQUASHFS_SWAP((s)->size, d, 64, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_INODE_T(s, d) SQUASHFS_SWAP_LONG_LONGS(s, d, 1)
-+
-+#define SQUASHFS_SWAP_SHORTS(s, d, n) {\
-+ int entry;\
-+ int bit_position;\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, n * 2);\
-+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
-+ 16)\
-+ SQUASHFS_SWAP(s[entry], d, bit_position, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_INTS(s, d, n) {\
-+ int entry;\
-+ int bit_position;\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, n * 4);\
-+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
-+ 32)\
-+ SQUASHFS_SWAP(s[entry], d, bit_position, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_LONG_LONGS(s, d, n) {\
-+ int entry;\
-+ int bit_position;\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, n * 8);\
-+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
-+ 64)\
-+ SQUASHFS_SWAP(s[entry], d, bit_position, 64);\
-+}
-+
-+#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\
-+ int entry;\
-+ int bit_position;\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, n * bits / 8);\
-+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
-+ bits)\
-+ SQUASHFS_SWAP(s[entry], d, bit_position, bits);\
-+}
-+
-+#define SQUASHFS_SWAP_FRAGMENT_INDEXES(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n)
-+#define SQUASHFS_SWAP_LOOKUP_BLOCKS(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n)
-+
-+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
-+
-+struct squashfs_base_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+} __attribute__ ((packed));
-+
-+struct squashfs_ipc_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned int type:4;
-+ unsigned int offset:4;
-+} __attribute__ ((packed));
-+
-+struct squashfs_dev_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned short rdev;
-+} __attribute__ ((packed));
-+
-+struct squashfs_symlink_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned short symlink_size;
-+ char symlink[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_reg_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned int mtime;
-+ unsigned int start_block;
-+ unsigned int file_size:32;
-+ unsigned short block_list[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned int file_size:19;
-+ unsigned int offset:13;
-+ unsigned int mtime;
-+ unsigned int start_block:24;
-+} __attribute__ ((packed));
-+
-+#define SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n) \
-+ SQUASHFS_MEMSET(s, d, n);\
-+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
-+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
-+ SQUASHFS_SWAP((s)->uid, d, 16, 4);\
-+ SQUASHFS_SWAP((s)->guid, d, 20, 4);
-+
-+#define SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, n) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n)\
-+}
-+
-+#define SQUASHFS_SWAP_IPC_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_ipc_inode_header_1));\
-+ SQUASHFS_SWAP((s)->type, d, 24, 4);\
-+ SQUASHFS_SWAP((s)->offset, d, 28, 4);\
-+}
-+
-+#define SQUASHFS_SWAP_DEV_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_dev_inode_header_1));\
-+ SQUASHFS_SWAP((s)->rdev, d, 24, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_symlink_inode_header_1));\
-+ SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_REG_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_reg_inode_header_1));\
-+ SQUASHFS_SWAP((s)->mtime, d, 24, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 56, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 88, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_dir_inode_header_1));\
-+ SQUASHFS_SWAP((s)->file_size, d, 24, 19);\
-+ SQUASHFS_SWAP((s)->offset, d, 43, 13);\
-+ SQUASHFS_SWAP((s)->mtime, d, 56, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 88, 24);\
-+}
-+
-+#endif
-+
-+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
-+
-+struct squashfs_dir_index_2 {
-+ unsigned int index:27;
-+ unsigned int start_block:29;
-+ unsigned char size;
-+ unsigned char name[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_base_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+} __attribute__ ((packed));
-+
-+struct squashfs_ipc_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+} __attribute__ ((packed));
-+
-+struct squashfs_dev_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned short rdev;
-+} __attribute__ ((packed));
-+
-+struct squashfs_symlink_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned short symlink_size;
-+ char symlink[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_reg_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned int mtime;
-+ unsigned int start_block;
-+ unsigned int fragment;
-+ unsigned int offset;
-+ unsigned int file_size:32;
-+ unsigned short block_list[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned int file_size:19;
-+ unsigned int offset:13;
-+ unsigned int mtime;
-+ unsigned int start_block:24;
-+} __attribute__ ((packed));
-+
-+struct squashfs_ldir_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned int file_size:27;
-+ unsigned int offset:13;
-+ unsigned int mtime;
-+ unsigned int start_block:24;
-+ unsigned int i_count:16;
-+ struct squashfs_dir_index_2 index[0];
-+} __attribute__ ((packed));
-+
-+union squashfs_inode_header_2 {
-+ struct squashfs_base_inode_header_2 base;
-+ struct squashfs_dev_inode_header_2 dev;
-+ struct squashfs_symlink_inode_header_2 symlink;
-+ struct squashfs_reg_inode_header_2 reg;
-+ struct squashfs_dir_inode_header_2 dir;
-+ struct squashfs_ldir_inode_header_2 ldir;
-+ struct squashfs_ipc_inode_header_2 ipc;
-+};
-+
-+struct squashfs_dir_header_2 {
-+ unsigned int count:8;
-+ unsigned int start_block:24;
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_entry_2 {
-+ unsigned int offset:13;
-+ unsigned int type:3;
-+ unsigned int size:8;
-+ char name[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_fragment_entry_2 {
-+ unsigned int start_block;
-+ unsigned int size;
-+} __attribute__ ((packed));
-+
-+#define SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
-+ SQUASHFS_MEMSET(s, d, n);\
-+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
-+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
-+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
-+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
-+
-+#define SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, n) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
-+}
-+
-+#define SQUASHFS_SWAP_IPC_INODE_HEADER_2(s, d) \
-+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, sizeof(struct squashfs_ipc_inode_header_2))
-+
-+#define SQUASHFS_SWAP_DEV_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_dev_inode_header_2)); \
-+ SQUASHFS_SWAP((s)->rdev, d, 32, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_symlink_inode_header_2));\
-+ SQUASHFS_SWAP((s)->symlink_size, d, 32, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_REG_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_reg_inode_header_2));\
-+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 64, 32);\
-+ SQUASHFS_SWAP((s)->fragment, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->offset, d, 128, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 160, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_dir_inode_header_2));\
-+ SQUASHFS_SWAP((s)->file_size, d, 32, 19);\
-+ SQUASHFS_SWAP((s)->offset, d, 51, 13);\
-+ SQUASHFS_SWAP((s)->mtime, d, 64, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 96, 24);\
-+}
-+
-+#define SQUASHFS_SWAP_LDIR_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_ldir_inode_header_2));\
-+ SQUASHFS_SWAP((s)->file_size, d, 32, 27);\
-+ SQUASHFS_SWAP((s)->offset, d, 59, 13);\
-+ SQUASHFS_SWAP((s)->mtime, d, 72, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 104, 24);\
-+ SQUASHFS_SWAP((s)->i_count, d, 128, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INDEX_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index_2));\
-+ SQUASHFS_SWAP((s)->index, d, 0, 27);\
-+ SQUASHFS_SWAP((s)->start_block, d, 27, 29);\
-+ SQUASHFS_SWAP((s)->size, d, 56, 8);\
-+}
-+#define SQUASHFS_SWAP_DIR_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header_2));\
-+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
-+ SQUASHFS_SWAP((s)->start_block, d, 8, 24);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_ENTRY_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry_2));\
-+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
-+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
-+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
-+}
-+
-+#define SQUASHFS_SWAP_FRAGMENT_ENTRY_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry_2));\
-+ SQUASHFS_SWAP((s)->start_block, d, 0, 32);\
-+ SQUASHFS_SWAP((s)->size, d, 32, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_FRAGMENT_INDEXES_2(s, d, n) SQUASHFS_SWAP_INTS(s, d, n)
-+
-+/* fragment and fragment table defines */
-+#define SQUASHFS_FRAGMENT_BYTES_2(A) (A * sizeof(struct squashfs_fragment_entry_2))
-+
-+#define SQUASHFS_FRAGMENT_INDEX_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEX_OFFSET_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) % \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEXES_2(A) ((SQUASHFS_FRAGMENT_BYTES_2(A) + \
-+ SQUASHFS_METADATA_SIZE - 1) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEX_BYTES_2(A) (SQUASHFS_FRAGMENT_INDEXES_2(A) *\
-+ sizeof(int))
-+
-+#endif
-+
-+#ifdef __KERNEL__
-+
-+/*
-+ * macros used to swap each structure entry, taking into account
-+ * bitfields and different bitfield placing conventions on differing
-+ * architectures
-+ */
-+
-+#include <asm/byteorder.h>
-+
-+#ifdef __BIG_ENDIAN
-+ /* convert from little endian to big endian */
-+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
-+ tbits, b_pos)
-+#else
-+ /* convert from big endian to little endian */
-+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
-+ tbits, 64 - tbits - b_pos)
-+#endif
-+
-+#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\
-+ b_pos = pos % 8;\
-+ val = 0;\
-+ s = (unsigned char *)p + (pos / 8);\
-+ d = ((unsigned char *) &val) + 7;\
-+ for(bits = 0; bits < (tbits + b_pos); bits += 8) \
-+ *d-- = *s++;\
-+ value = (val >> (SHIFT))/* & ((1 << tbits) - 1)*/;\
-+}
-+
-+#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n);
-+
-+#endif
-+#endif
-diff --git a/include/linux/squashfs_fs_i.h b/include/linux/squashfs_fs_i.h
-new file mode 100644
-index 0000000..798891a
---- /dev/null
-+++ b/include/linux/squashfs_fs_i.h
-@@ -0,0 +1,45 @@
-+#ifndef SQUASHFS_FS_I
-+#define SQUASHFS_FS_I
-+/*
-+ * Squashfs
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs_fs_i.h
-+ */
-+
-+struct squashfs_inode_info {
-+ long long start_block;
-+ unsigned int offset;
-+ union {
-+ struct {
-+ long long fragment_start_block;
-+ unsigned int fragment_size;
-+ unsigned int fragment_offset;
-+ long long block_list_start;
-+ } s1;
-+ struct {
-+ long long directory_index_start;
-+ unsigned int directory_index_offset;
-+ unsigned int directory_index_count;
-+ unsigned int parent_inode;
-+ } s2;
-+ } u;
-+ struct inode vfs_inode;
-+};
-+#endif
-diff --git a/include/linux/squashfs_fs_sb.h b/include/linux/squashfs_fs_sb.h
-new file mode 100644
-index 0000000..8f3bf99
---- /dev/null
-+++ b/include/linux/squashfs_fs_sb.h
-@@ -0,0 +1,74 @@
-+#ifndef SQUASHFS_FS_SB
-+#define SQUASHFS_FS_SB
-+/*
-+ * Squashfs
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs_fs_sb.h
-+ */
-+
-+#include <linux/squashfs_fs.h>
-+
-+struct squashfs_cache {
-+ long long block;
-+ int length;
-+ long long next_index;
-+ char *data;
-+};
-+
-+struct squashfs_fragment_cache {
-+ long long block;
-+ int length;
-+ unsigned int locked;
-+ char *data;
-+};
-+
-+struct squashfs_sb_info {
-+ struct squashfs_super_block sblk;
-+ int devblksize;
-+ int devblksize_log2;
-+ int swap;
-+ struct squashfs_cache *block_cache;
-+ struct squashfs_fragment_cache *fragment;
-+ int next_cache;
-+ int next_fragment;
-+ int next_meta_index;
-+ unsigned int *uid;
-+ unsigned int *guid;
-+ long long *fragment_index;
-+ unsigned int *fragment_index_2;
-+ char *read_page;
-+ struct mutex read_data_mutex;
-+ struct mutex read_page_mutex;
-+ struct mutex block_cache_mutex;
-+ struct mutex fragment_mutex;
-+ struct mutex meta_index_mutex;
-+ wait_queue_head_t waitq;
-+ wait_queue_head_t fragment_wait_queue;
-+ struct meta_index *meta_index;
-+ z_stream stream;
-+ long long *inode_lookup_table;
-+ int (*read_inode)(struct inode *i, squashfs_inode_t \
-+ inode);
-+ long long (*read_blocklist)(struct inode *inode, int \
-+ index, int readahead_blks, char *block_list, \
-+ unsigned short **block_p, unsigned int *bsize);
-+ int (*read_fragment_index_table)(struct super_block *s);
-+};
-+#endif
-diff --git a/init/Kconfig b/init/Kconfig
-index b170aa1..bcfc3b4 100644
---- a/init/Kconfig
-+++ b/init/Kconfig
-@@ -244,23 +244,21 @@ config AUDITSYSCALL
- ensure that INOTIFY is configured.
-
- config IKCONFIG
-- tristate "Kernel .config support"
-+ tristate "Kernel .miniconfig support"
- ---help---
-- This option enables the complete Linux kernel ".config" file
-+ This option enables the mini Linux kernel ".miniconfig" file
- contents to be saved in the kernel. It provides documentation
- of which kernel options are used in a running kernel or in an
-- on-disk kernel. This information can be extracted from the kernel
-- image file with the script scripts/extract-ikconfig and used as
-- input to rebuild the current kernel or to build another kernel.
-- It can also be extracted from a running kernel by reading
-- /proc/config.gz if enabled (below).
-+ on-disk kernel.
-+ It can be extracted from a running kernel by reading
-+ /proc/miniconfig.gz if enabled (below).
-
- config IKCONFIG_PROC
-- bool "Enable access to .config through /proc/config.gz"
-+ bool "Enable access to .miniconfig through /proc/miniconfig.gz"
- depends on IKCONFIG && PROC_FS
- ---help---
- This option enables access to the kernel configuration file
-- through /proc/config.gz.
-+ through /proc/miniconfig.gz.
-
- config CPUSETS
- bool "Cpuset support"
-diff --git a/init/LzmaDecode.c b/init/LzmaDecode.c
-new file mode 100644
-index 0000000..21bf40b
---- /dev/null
-+++ b/init/LzmaDecode.c
-@@ -0,0 +1,588 @@
-+/*
-+ LzmaDecode.c
-+ LZMA Decoder (optimized for Speed version)
-+
-+ LZMA SDK 4.22 Copyright (c) 1999-2005 Igor Pavlov (2005-06-10)
-+ http://www.7-zip.org/
-+
-+ LZMA SDK is licensed under two licenses:
-+ 1) GNU Lesser General Public License (GNU LGPL)
-+ 2) Common Public License (CPL)
-+ It means that you can select one of these two licenses and
-+ follow rules of that license.
-+
-+ SPECIAL EXCEPTION:
-+ Igor Pavlov, as the author of this Code, expressly permits you to
-+ statically or dynamically link your Code (or bind by name) to the
-+ interfaces of this file without subjecting your linked Code to the
-+ terms of the CPL or GNU LGPL. Any modifications or additions
-+ to this file, however, are subject to the LGPL or CPL terms.
-+*/
-+
-+#include "LzmaDecode.h"
-+
-+#ifndef Byte
-+#define Byte unsigned char
-+#endif
-+
-+#define kNumTopBits 24
-+#define kTopValue ((UInt32)1 << kNumTopBits)
-+
-+#define kNumBitModelTotalBits 11
-+#define kBitModelTotal (1 << kNumBitModelTotalBits)
-+#define kNumMoveBits 5
-+
-+#define RC_READ_BYTE (*Buffer++)
-+
-+#define RC_INIT2 Code = 0; Range = 0xFFFFFFFF; \
-+ { int i; for(i = 0; i < 5; i++) { RC_TEST; Code = (Code << 8) | RC_READ_BYTE; }}
-+
-+#ifdef _LZMA_IN_CB
-+
-+#define RC_TEST { if (Buffer == BufferLim) \
-+ { SizeT size; int result = InCallback->Read(InCallback, &Buffer, &size); if (result != LZMA_RESULT_OK) return result; \
-+ BufferLim = Buffer + size; if (size == 0) return LZMA_RESULT_DATA_ERROR; }}
-+
-+#define RC_INIT Buffer = BufferLim = 0; RC_INIT2
-+
-+#else
-+
-+#define RC_TEST { if (Buffer == BufferLim) return LZMA_RESULT_DATA_ERROR; }
-+
-+#define RC_INIT(buffer, bufferSize) Buffer = buffer; BufferLim = buffer + bufferSize; RC_INIT2
-+
-+#endif
-+
-+#define RC_NORMALIZE if (Range < kTopValue) { RC_TEST; Range <<= 8; Code = (Code << 8) | RC_READ_BYTE; }
-+
-+#define IfBit0(p) RC_NORMALIZE; bound = (Range >> kNumBitModelTotalBits) * *(p); if (Code < bound)
-+#define UpdateBit0(p) Range = bound; *(p) += (kBitModelTotal - *(p)) >> kNumMoveBits;
-+#define UpdateBit1(p) Range -= bound; Code -= bound; *(p) -= (*(p)) >> kNumMoveBits;
-+
-+#define RC_GET_BIT2(p, mi, A0, A1) IfBit0(p) \
-+ { UpdateBit0(p); mi <<= 1; A0; } else \
-+ { UpdateBit1(p); mi = (mi + mi) + 1; A1; }
-+
-+#define RC_GET_BIT(p, mi) RC_GET_BIT2(p, mi, ; , ;)
-+
-+#define RangeDecoderBitTreeDecode(probs, numLevels, res) \
-+ { int i = numLevels; res = 1; \
-+ do { CProb *p = probs + res; RC_GET_BIT(p, res) } while(--i != 0); \
-+ res -= (1 << numLevels); }
-+
-+
-+#define kNumPosBitsMax 4
-+#define kNumPosStatesMax (1 << kNumPosBitsMax)
-+
-+#define kLenNumLowBits 3
-+#define kLenNumLowSymbols (1 << kLenNumLowBits)
-+#define kLenNumMidBits 3
-+#define kLenNumMidSymbols (1 << kLenNumMidBits)
-+#define kLenNumHighBits 8
-+#define kLenNumHighSymbols (1 << kLenNumHighBits)
-+
-+#define LenChoice 0
-+#define LenChoice2 (LenChoice + 1)
-+#define LenLow (LenChoice2 + 1)
-+#define LenMid (LenLow + (kNumPosStatesMax << kLenNumLowBits))
-+#define LenHigh (LenMid + (kNumPosStatesMax << kLenNumMidBits))
-+#define kNumLenProbs (LenHigh + kLenNumHighSymbols)
-+
-+
-+#define kNumStates 12
-+#define kNumLitStates 7
-+
-+#define kStartPosModelIndex 4
-+#define kEndPosModelIndex 14
-+#define kNumFullDistances (1 << (kEndPosModelIndex >> 1))
-+
-+#define kNumPosSlotBits 6
-+#define kNumLenToPosStates 4
-+
-+#define kNumAlignBits 4
-+#define kAlignTableSize (1 << kNumAlignBits)
-+
-+#define kMatchMinLen 2
-+
-+#define IsMatch 0
-+#define IsRep (IsMatch + (kNumStates << kNumPosBitsMax))
-+#define IsRepG0 (IsRep + kNumStates)
-+#define IsRepG1 (IsRepG0 + kNumStates)
-+#define IsRepG2 (IsRepG1 + kNumStates)
-+#define IsRep0Long (IsRepG2 + kNumStates)
-+#define PosSlot (IsRep0Long + (kNumStates << kNumPosBitsMax))
-+#define SpecPos (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))
-+#define Align (SpecPos + kNumFullDistances - kEndPosModelIndex)
-+#define LenCoder (Align + kAlignTableSize)
-+#define RepLenCoder (LenCoder + kNumLenProbs)
-+#define Literal (RepLenCoder + kNumLenProbs)
-+
-+#if Literal != LZMA_BASE_SIZE
-+StopCompilingDueBUG
-+#endif
-+
-+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size)
-+{
-+ unsigned char prop0;
-+ if (size < LZMA_PROPERTIES_SIZE)
-+ return LZMA_RESULT_DATA_ERROR;
-+ prop0 = propsData[0];
-+ if (prop0 >= (9 * 5 * 5))
-+ return LZMA_RESULT_DATA_ERROR;
-+ {
-+ for (propsRes->pb = 0; prop0 >= (9 * 5); propsRes->pb++, prop0 -= (9 * 5));
-+ for (propsRes->lp = 0; prop0 >= 9; propsRes->lp++, prop0 -= 9);
-+ propsRes->lc = prop0;
-+ /*
-+ unsigned char remainder = (unsigned char)(prop0 / 9);
-+ propsRes->lc = prop0 % 9;
-+ propsRes->pb = remainder / 5;
-+ propsRes->lp = remainder % 5;
-+ */
-+ }
-+
-+ #ifdef _LZMA_OUT_READ
-+ {
-+ int i;
-+ propsRes->DictionarySize = 0;
-+ for (i = 0; i < 4; i++)
-+ propsRes->DictionarySize += (UInt32)(propsData[1 + i]) << (i * 8);
-+ if (propsRes->DictionarySize == 0)
-+ propsRes->DictionarySize = 1;
-+ }
-+ #endif
-+ return LZMA_RESULT_OK;
-+}
-+
-+#define kLzmaStreamWasFinishedId (-1)
-+
-+int LzmaDecode(CLzmaDecoderState *vs,
-+ #ifdef _LZMA_IN_CB
-+ ILzmaInCallback *InCallback,
-+ #else
-+ const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
-+ #endif
-+ unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed)
-+{
-+ CProb *p = vs->Probs;
-+ SizeT nowPos = 0;
-+ Byte previousByte = 0;
-+ UInt32 posStateMask = (1 << (vs->Properties.pb)) - 1;
-+ UInt32 literalPosMask = (1 << (vs->Properties.lp)) - 1;
-+ int lc = vs->Properties.lc;
-+
-+ #ifdef _LZMA_OUT_READ
-+
-+ UInt32 Range = vs->Range;
-+ UInt32 Code = vs->Code;
-+ #ifdef _LZMA_IN_CB
-+ const Byte *Buffer = vs->Buffer;
-+ const Byte *BufferLim = vs->BufferLim;
-+ #else
-+ const Byte *Buffer = inStream;
-+ const Byte *BufferLim = inStream + inSize;
-+ #endif
-+ int state = vs->State;
-+ UInt32 rep0 = vs->Reps[0], rep1 = vs->Reps[1], rep2 = vs->Reps[2], rep3 = vs->Reps[3];
-+ int len = vs->RemainLen;
-+ UInt32 globalPos = vs->GlobalPos;
-+ UInt32 distanceLimit = vs->DistanceLimit;
-+
-+ Byte *dictionary = vs->Dictionary;
-+ UInt32 dictionarySize = vs->Properties.DictionarySize;
-+ UInt32 dictionaryPos = vs->DictionaryPos;
-+
-+ Byte tempDictionary[4];
-+
-+ #ifndef _LZMA_IN_CB
-+ *inSizeProcessed = 0;
-+ #endif
-+ *outSizeProcessed = 0;
-+ if (len == kLzmaStreamWasFinishedId)
-+ return LZMA_RESULT_OK;
-+
-+ if (dictionarySize == 0)
-+ {
-+ dictionary = tempDictionary;
-+ dictionarySize = 1;
-+ tempDictionary[0] = vs->TempDictionary[0];
-+ }
-+
-+ if (len == kLzmaNeedInitId)
-+ {
-+ {
-+ UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
-+ UInt32 i;
-+ for (i = 0; i < numProbs; i++)
-+ p[i] = kBitModelTotal >> 1;
-+ rep0 = rep1 = rep2 = rep3 = 1;
-+ state = 0;
-+ globalPos = 0;
-+ distanceLimit = 0;
-+ dictionaryPos = 0;
-+ dictionary[dictionarySize - 1] = 0;
-+ #ifdef _LZMA_IN_CB
-+ RC_INIT;
-+ #else
-+ RC_INIT(inStream, inSize);
-+ #endif
-+ }
-+ len = 0;
-+ }
-+ while(len != 0 && nowPos < outSize)
-+ {
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ outStream[nowPos++] = dictionary[dictionaryPos] = dictionary[pos];
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ len--;
-+ }
-+ if (dictionaryPos == 0)
-+ previousByte = dictionary[dictionarySize - 1];
-+ else
-+ previousByte = dictionary[dictionaryPos - 1];
-+
-+ #else /* if !_LZMA_OUT_READ */
-+
-+ int state = 0;
-+ UInt32 rep0 = 1, rep1 = 1, rep2 = 1, rep3 = 1;
-+ int len = 0;
-+ const Byte *Buffer;
-+ const Byte *BufferLim;
-+ UInt32 Range;
-+ UInt32 Code;
-+
-+ #ifndef _LZMA_IN_CB
-+ *inSizeProcessed = 0;
-+ #endif
-+ *outSizeProcessed = 0;
-+
-+ {
-+ UInt32 i;
-+ UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
-+ for (i = 0; i < numProbs; i++)
-+ p[i] = kBitModelTotal >> 1;
-+ }
-+
-+ #ifdef _LZMA_IN_CB
-+ RC_INIT;
-+ #else
-+ RC_INIT(inStream, inSize);
-+ #endif
-+
-+ #endif /* _LZMA_OUT_READ */
-+
-+ while(nowPos < outSize)
-+ {
-+ CProb *prob;
-+ UInt32 bound;
-+ int posState = (int)(
-+ (nowPos
-+ #ifdef _LZMA_OUT_READ
-+ + globalPos
-+ #endif
-+ )
-+ & posStateMask);
-+
-+ prob = p + IsMatch + (state << kNumPosBitsMax) + posState;
-+ IfBit0(prob)
-+ {
-+ int symbol = 1;
-+ UpdateBit0(prob)
-+ prob = p + Literal + (LZMA_LIT_SIZE *
-+ (((
-+ (nowPos
-+ #ifdef _LZMA_OUT_READ
-+ + globalPos
-+ #endif
-+ )
-+ & literalPosMask) << lc) + (previousByte >> (8 - lc))));
-+
-+ if (state >= kNumLitStates)
-+ {
-+ int matchByte;
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ matchByte = dictionary[pos];
-+ #else
-+ matchByte = outStream[nowPos - rep0];
-+ #endif
-+ do
-+ {
-+ int bit;
-+ CProb *probLit;
-+ matchByte <<= 1;
-+ bit = (matchByte & 0x100);
-+ probLit = prob + 0x100 + bit + symbol;
-+ RC_GET_BIT2(probLit, symbol, if (bit != 0) break, if (bit == 0) break)
-+ }
-+ while (symbol < 0x100);
-+ }
-+ while (symbol < 0x100)
-+ {
-+ CProb *probLit = prob + symbol;
-+ RC_GET_BIT(probLit, symbol)
-+ }
-+ previousByte = (Byte)symbol;
-+
-+ outStream[nowPos++] = previousByte;
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit < dictionarySize)
-+ distanceLimit++;
-+
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #endif
-+ if (state < 4) state = 0;
-+ else if (state < 10) state -= 3;
-+ else state -= 6;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRep + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ rep3 = rep2;
-+ rep2 = rep1;
-+ rep1 = rep0;
-+ state = state < kNumLitStates ? 0 : 3;
-+ prob = p + LenCoder;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRepG0 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ prob = p + IsRep0Long + (state << kNumPosBitsMax) + posState;
-+ IfBit0(prob)
-+ {
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos;
-+ #endif
-+ UpdateBit0(prob);
-+
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit == 0)
-+ #else
-+ if (nowPos == 0)
-+ #endif
-+ return LZMA_RESULT_DATA_ERROR;
-+
-+ state = state < kNumLitStates ? 9 : 11;
-+ #ifdef _LZMA_OUT_READ
-+ pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ previousByte = dictionary[pos];
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #else
-+ previousByte = outStream[nowPos - rep0];
-+ #endif
-+ outStream[nowPos++] = previousByte;
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit < dictionarySize)
-+ distanceLimit++;
-+ #endif
-+
-+ continue;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ }
-+ }
-+ else
-+ {
-+ UInt32 distance;
-+ UpdateBit1(prob);
-+ prob = p + IsRepG1 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ distance = rep1;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRepG2 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ distance = rep2;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ distance = rep3;
-+ rep3 = rep2;
-+ }
-+ rep2 = rep1;
-+ }
-+ rep1 = rep0;
-+ rep0 = distance;
-+ }
-+ state = state < kNumLitStates ? 8 : 11;
-+ prob = p + RepLenCoder;
-+ }
-+ {
-+ int numBits, offset;
-+ CProb *probLen = prob + LenChoice;
-+ IfBit0(probLen)
-+ {
-+ UpdateBit0(probLen);
-+ probLen = prob + LenLow + (posState << kLenNumLowBits);
-+ offset = 0;
-+ numBits = kLenNumLowBits;
-+ }
-+ else
-+ {
-+ UpdateBit1(probLen);
-+ probLen = prob + LenChoice2;
-+ IfBit0(probLen)
-+ {
-+ UpdateBit0(probLen);
-+ probLen = prob + LenMid + (posState << kLenNumMidBits);
-+ offset = kLenNumLowSymbols;
-+ numBits = kLenNumMidBits;
-+ }
-+ else
-+ {
-+ UpdateBit1(probLen);
-+ probLen = prob + LenHigh;
-+ offset = kLenNumLowSymbols + kLenNumMidSymbols;
-+ numBits = kLenNumHighBits;
-+ }
-+ }
-+ RangeDecoderBitTreeDecode(probLen, numBits, len);
-+ len += offset;
-+ }
-+
-+ if (state < 4)
-+ {
-+ int posSlot;
-+ state += kNumLitStates;
-+ prob = p + PosSlot +
-+ ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) <<
-+ kNumPosSlotBits);
-+ RangeDecoderBitTreeDecode(prob, kNumPosSlotBits, posSlot);
-+ if (posSlot >= kStartPosModelIndex)
-+ {
-+ int numDirectBits = ((posSlot >> 1) - 1);
-+ rep0 = (2 | ((UInt32)posSlot & 1));
-+ if (posSlot < kEndPosModelIndex)
-+ {
-+ rep0 <<= numDirectBits;
-+ prob = p + SpecPos + rep0 - posSlot - 1;
-+ }
-+ else
-+ {
-+ numDirectBits -= kNumAlignBits;
-+ do
-+ {
-+ RC_NORMALIZE
-+ Range >>= 1;
-+ rep0 <<= 1;
-+ if (Code >= Range)
-+ {
-+ Code -= Range;
-+ rep0 |= 1;
-+ }
-+ }
-+ while (--numDirectBits != 0);
-+ prob = p + Align;
-+ rep0 <<= kNumAlignBits;
-+ numDirectBits = kNumAlignBits;
-+ }
-+ {
-+ int i = 1;
-+ int mi = 1;
-+ do
-+ {
-+ CProb *prob3 = prob + mi;
-+ RC_GET_BIT2(prob3, mi, ; , rep0 |= i);
-+ i <<= 1;
-+ }
-+ while(--numDirectBits != 0);
-+ }
-+ }
-+ else
-+ rep0 = posSlot;
-+ if (++rep0 == (UInt32)(0))
-+ {
-+ /* it's for stream version */
-+ len = kLzmaStreamWasFinishedId;
-+ break;
-+ }
-+ }
-+
-+ len += kMatchMinLen;
-+ #ifdef _LZMA_OUT_READ
-+ if (rep0 > distanceLimit)
-+ #else
-+ if (rep0 > nowPos)
-+ #endif
-+ return LZMA_RESULT_DATA_ERROR;
-+
-+ #ifdef _LZMA_OUT_READ
-+ if (dictionarySize - distanceLimit > (UInt32)len)
-+ distanceLimit += len;
-+ else
-+ distanceLimit = dictionarySize;
-+ #endif
-+
-+ do
-+ {
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ previousByte = dictionary[pos];
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #else
-+ previousByte = outStream[nowPos - rep0];
-+ #endif
-+ len--;
-+ outStream[nowPos++] = previousByte;
-+ }
-+ while(len != 0 && nowPos < outSize);
-+ }
-+ }
-+ RC_NORMALIZE;
-+
-+ #ifdef _LZMA_OUT_READ
-+ vs->Range = Range;
-+ vs->Code = Code;
-+ vs->DictionaryPos = dictionaryPos;
-+ vs->GlobalPos = globalPos + (UInt32)nowPos;
-+ vs->DistanceLimit = distanceLimit;
-+ vs->Reps[0] = rep0;
-+ vs->Reps[1] = rep1;
-+ vs->Reps[2] = rep2;
-+ vs->Reps[3] = rep3;
-+ vs->State = state;
-+ vs->RemainLen = len;
-+ vs->TempDictionary[0] = tempDictionary[0];
-+ #endif
-+
-+ #ifdef _LZMA_IN_CB
-+ vs->Buffer = Buffer;
-+ vs->BufferLim = BufferLim;
-+ #else
-+ *inSizeProcessed = (SizeT)(Buffer - inStream);
-+ #endif
-+ *outSizeProcessed = nowPos;
-+ return LZMA_RESULT_OK;
-+}
-diff --git a/init/LzmaDecode.h b/init/LzmaDecode.h
-new file mode 100644
-index 0000000..213062a
---- /dev/null
-+++ b/init/LzmaDecode.h
-@@ -0,0 +1,131 @@
-+/*
-+ LzmaDecode.h
-+ LZMA Decoder interface
-+
-+ LZMA SDK 4.21 Copyright (c) 1999-2005 Igor Pavlov (2005-06-08)
-+ http://www.7-zip.org/
-+
-+ LZMA SDK is licensed under two licenses:
-+ 1) GNU Lesser General Public License (GNU LGPL)
-+ 2) Common Public License (CPL)
-+ It means that you can select one of these two licenses and
-+ follow rules of that license.
-+
-+ SPECIAL EXCEPTION:
-+ Igor Pavlov, as the author of this code, expressly permits you to
-+ statically or dynamically link your code (or bind by name) to the
-+ interfaces of this file without subjecting your linked code to the
-+ terms of the CPL or GNU LGPL. Any modifications or additions
-+ to this file, however, are subject to the LGPL or CPL terms.
-+*/
-+
-+#ifndef __LZMADECODE_H
-+#define __LZMADECODE_H
-+
-+/* #define _LZMA_IN_CB */
-+/* Use callback for input data */
-+
-+/* #define _LZMA_OUT_READ */
-+/* Use read function for output data */
-+
-+/* #define _LZMA_PROB32 */
-+/* It can increase speed on some 32-bit CPUs,
-+ but memory usage will be doubled in that case */
-+
-+/* #define _LZMA_LOC_OPT */
-+/* Enable local speed optimizations inside code */
-+
-+/* #define _LZMA_SYSTEM_SIZE_T */
-+/* Use system's size_t. You can use it to enable 64-bit sizes supporting*/
-+
-+#ifndef UInt32
-+#ifdef _LZMA_UINT32_IS_ULONG
-+#define UInt32 unsigned long
-+#else
-+#define UInt32 unsigned int
-+#endif
-+#endif
-+
-+#ifndef SizeT
-+#ifdef _LZMA_SYSTEM_SIZE_T
-+#include <stddef.h>
-+#define SizeT size_t
-+#else
-+#define SizeT UInt32
-+#endif
-+#endif
-+
-+#ifdef _LZMA_PROB32
-+#define CProb UInt32
-+#else
-+#define CProb unsigned short
-+#endif
-+
-+#define LZMA_RESULT_OK 0
-+#define LZMA_RESULT_DATA_ERROR 1
-+
-+#ifdef _LZMA_IN_CB
-+typedef struct _ILzmaInCallback
-+{
-+ int (*Read)(void *object, const unsigned char **buffer, SizeT *bufferSize);
-+} ILzmaInCallback;
-+#endif
-+
-+#define LZMA_BASE_SIZE 1846
-+#define LZMA_LIT_SIZE 768
-+
-+#define LZMA_PROPERTIES_SIZE 5
-+
-+typedef struct _CLzmaProperties
-+{
-+ int lc;
-+ int lp;
-+ int pb;
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 DictionarySize;
-+ #endif
-+}CLzmaProperties;
-+
-+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size);
-+
-+#define LzmaGetNumProbs(Properties) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((Properties)->lc + (Properties)->lp)))
-+
-+#define kLzmaNeedInitId (-2)
-+
-+typedef struct _CLzmaDecoderState
-+{
-+ CLzmaProperties Properties;
-+ CProb *Probs;
-+
-+ #ifdef _LZMA_IN_CB
-+ const unsigned char *Buffer;
-+ const unsigned char *BufferLim;
-+ #endif
-+
-+ #ifdef _LZMA_OUT_READ
-+ unsigned char *Dictionary;
-+ UInt32 Range;
-+ UInt32 Code;
-+ UInt32 DictionaryPos;
-+ UInt32 GlobalPos;
-+ UInt32 DistanceLimit;
-+ UInt32 Reps[4];
-+ int State;
-+ int RemainLen;
-+ unsigned char TempDictionary[4];
-+ #endif
-+} CLzmaDecoderState;
-+
-+#ifdef _LZMA_OUT_READ
-+#define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; }
-+#endif
-+
-+int LzmaDecode(CLzmaDecoderState *vs,
-+ #ifdef _LZMA_IN_CB
-+ ILzmaInCallback *inCallback,
-+ #else
-+ const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
-+ #endif
-+ unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed);
-+
-+#endif
-diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
-index ed652f4..5fd1ec5 100644
---- a/init/do_mounts_rd.c
-+++ b/init/do_mounts_rd.c
-@@ -5,7 +5,9 @@
- #include <linux/ext2_fs.h>
- #include <linux/romfs_fs.h>
- #include <linux/cramfs_fs.h>
-+#include <linux/squashfs_fs.h>
- #include <linux/initrd.h>
-+#include <linux/vmalloc.h>
- #include <linux/string.h>
-
- #include "do_mounts.h"
-@@ -31,6 +33,9 @@ static int __init ramdisk_start_setup(char *str)
- __setup("ramdisk_start=", ramdisk_start_setup);
-
- static int __init crd_load(int in_fd, int out_fd);
-+#ifdef CONFIG_LZMA_INITRD
-+static int __init lzma_rd_load(int in_fd, int out_fd);
-+#endif
-
- /*
- * This routine tries to find a RAM disk image to load, and returns the
-@@ -39,6 +44,7 @@ static int __init crd_load(int in_fd, int out_fd);
- * numbers could not be found.
- *
- * We currently check for the following magic numbers:
-+ * squashfs
- * minix
- * ext2
- * romfs
-@@ -53,6 +59,7 @@ identify_ramdisk_image(int fd, int start_block)
- struct ext2_super_block *ext2sb;
- struct romfs_super_block *romfsb;
- struct cramfs_super *cramfsb;
-+ struct squashfs_super_block *squashfsb;
- int nblocks = -1;
- unsigned char *buf;
-
-@@ -64,6 +71,7 @@ identify_ramdisk_image(int fd, int start_block)
- ext2sb = (struct ext2_super_block *) buf;
- romfsb = (struct romfs_super_block *) buf;
- cramfsb = (struct cramfs_super *) buf;
-+ squashfsb = (struct squashfs_super_block *) buf;
- memset(buf, 0xe5, size);
-
- /*
-@@ -82,6 +90,17 @@ identify_ramdisk_image(int fd, int start_block)
- nblocks = 0;
- goto done;
- }
-+ /*
-+ * handle lzma compressed initrd, returns nblocks=1 as indication
-+ */
-+ if( buf[0] < 9 * 5 * 5 && buf[9] == 0 && buf[10] == 0 && buf[11] == 0
-+ && buf[12] == 0 )
-+ {
-+ printk( KERN_NOTICE "RAMDISK: LZMA image found at block %d\n",
-+ start_block);
-+ nblocks = 1; // just a convenient return flag
-+ goto done;
-+ }
-
- /* romfs is at block zero too */
- if (romfsb->word0 == ROMSB_WORD0 &&
-@@ -101,6 +120,18 @@ identify_ramdisk_image(int fd, int start_block)
- goto done;
- }
-
-+ /* squashfs is at block zero too */
-+ if (squashfsb->s_magic == SQUASHFS_MAGIC) {
-+ printk(KERN_NOTICE
-+ "RAMDISK: squashfs filesystem found at block %d\n",
-+ start_block);
-+ if (squashfsb->s_major < 3)
-+ nblocks = (squashfsb->bytes_used_2+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
-+ else
-+ nblocks = (squashfsb->bytes_used+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
-+ goto done;
-+ }
-+
- /*
- * Read block 1 to test for minix and ext2 superblock
- */
-@@ -172,7 +203,22 @@ int __init rd_load_image(char *from)
- #endif
- goto done;
- }
--
-+#ifdef CONFIG_LZMA_INITRD
-+ /*
-+ * handle lzma compressed image
-+ */
-+ if ( nblocks == 1 )
-+ {
-+ nblocks = 0;
-+ if ( lzma_rd_load(in_fd, out_fd) == 0 )
-+ {
-+ printk("\nLZMA initrd loaded successfully\n");
-+ goto successful_load;
-+ }
-+ printk(KERN_NOTICE "LZMA initrd is not in the correct format\n");
-+ goto done;
-+ }
-+#endif
- /*
- * NOTE NOTE: nblocks is not actually blocks but
- * the number of kibibytes of data to load into a ramdisk.
-@@ -393,6 +439,134 @@ static void __init error(char *x)
- unzip_error = 1;
- }
-
-+#ifdef CONFIG_LZMA_INITRD
-+#define _LZMA_IN_CB
-+#define _LZMA_OUT_READ
-+#include "LzmaDecode.h"
-+#include "LzmaDecode.c"
-+
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize);
-+
-+/*
-+ * Do the lzma decompression
-+ */
-+static int __init lzma_rd_load(int in_fd, int out_fd)
-+{
-+ unsigned int i;
-+ CLzmaDecoderState state;
-+ unsigned char* outputbuffer;
-+ unsigned int uncompressedSize = 0;
-+ unsigned char* p;
-+ unsigned int kBlockSize = 0x10000;
-+ unsigned int nowPos = 0;
-+ unsigned int outsizeProcessed = 0;
-+ int res;
-+ ILzmaInCallback callback;
-+
-+ insize = 0; /* valid bytes in inbuf */
-+ inptr = 0; /* index of next byte to be processed in inbuf */
-+ exit_code = 0;
-+ crd_infd = in_fd;
-+ inbuf = kmalloc(INBUFSIZ, GFP_KERNEL);
-+ if (inbuf == 0)
-+ {
-+ printk(KERN_ERR "RAMDISK: Couldn't allocate lzma input buffer\n");
-+ return -1;
-+ }
-+
-+ callback.Read = read_byte;
-+
-+ /* lzma args */
-+ i = get_byte();
-+ state.Properties.lc = i % 9, i = i / 9;
-+ state.Properties.lp = i % 5, state.Properties.pb = i / 5;
-+
-+ /* read dictionary size */
-+ p = (char*)&state.Properties.DictionarySize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ /* get uncompressedSize */
-+ p= (char*)&uncompressedSize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ /* skip big file */
-+ for (i = 0; i < 4; i++)
-+ get_byte();
-+
-+ printk( KERN_NOTICE "RAMDISK: LZMA lc=%d,lp=%d,pb=%d,dictSize=%d,origSize=%d\n",
-+ state.Properties.lc, state.Properties.lp, state.Properties.pb, state.Properties.DictionarySize, uncompressedSize);
-+ outputbuffer = kmalloc(kBlockSize, GFP_KERNEL);
-+ if (outputbuffer == 0) {
-+ printk(KERN_ERR "RAMDISK: Couldn't allocate lzma output buffer\n");
-+ return -1;
-+ }
-+
-+ state.Probs = (CProb*)kmalloc( LzmaGetNumProbs(&state.Properties)*sizeof(CProb), GFP_KERNEL);
-+ if ( state.Probs == 0) {
-+ printk(KERN_ERR "RAMDISK: Couldn't allocate lzma workspace\n");
-+ return -1;
-+ }
-+
-+#ifdef CONFIG_LZMA_INITRD_KMALLOC_ONLY
-+ state.Dictionary = kmalloc( state.Properties.DictionarySize, GFP_KERNEL);
-+#else
-+ state.Dictionary = vmalloc( state.Properties.DictionarySize);
-+#endif
-+ if ( state.Dictionary == 0) {
-+ printk(KERN_ERR "RAMDISK: Couldn't allocate lzma dictionary\n");
-+ return -1;
-+ }
-+
-+ printk( KERN_NOTICE "LZMA initrd by Ming-Ching Tiew <mctiew@yahoo.com> " );
-+
-+ LzmaDecoderInit( &state );
-+
-+ for( nowPos =0; nowPos < uncompressedSize ; )
-+ {
-+ UInt32 blockSize = uncompressedSize - nowPos;
-+ if( blockSize > kBlockSize)
-+ blockSize = kBlockSize;
-+ res = LzmaDecode( &state, &callback, outputbuffer, blockSize, &outsizeProcessed);
-+ if( res != 0 ) {
-+ printk( KERN_ERR "RAMDISK: Lzma decode failure\n");
-+ return -1;
-+ }
-+ if( outsizeProcessed == 0 )
-+ {
-+ uncompressedSize = nowPos;
-+ printk( KERN_NOTICE "RAMDISK nowPos=%d, uncompressedSize=%d\n",
-+ nowPos, uncompressedSize );
-+ break;
-+ }
-+ sys_write(out_fd, outputbuffer, outsizeProcessed );
-+ nowPos += outsizeProcessed;
-+ printk( ".");
-+ }
-+
-+#ifdef CONFIG_LZMA_INITRD_KMALLOC_ONLY
-+ kfree(state.Dictionary);
-+#else
-+ vfree(state.Dictionary);
-+#endif
-+ kfree(inbuf);
-+ kfree(outputbuffer);
-+ kfree(state.Probs);
-+ return 0;
-+}
-+
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize)
-+{
-+ static unsigned char val;
-+ *bufferSize = 1;
-+ val = get_byte();
-+ *buffer = &val;
-+ return LZMA_RESULT_OK;
-+}
-+
-+#endif /*CONFIG_LZMA_INITRD*/
-+
- static int __init crd_load(int in_fd, int out_fd)
- {
- int result;
-diff --git a/init/initramfs.c b/init/initramfs.c
-index 00eff7a..30d32a2 100644
---- a/init/initramfs.c
-+++ b/init/initramfs.c
-@@ -6,6 +6,7 @@
- #include <linux/delay.h>
- #include <linux/string.h>
- #include <linux/syscalls.h>
-+#include <linux/vmalloc.h>
-
- static __initdata char *message;
- static void __init error(char *x)
-@@ -441,6 +442,118 @@ static void __init flush_window(void)
- outcnt = 0;
- }
-
-+#ifdef CONFIG_LZMA_INITRAM_FS
-+#define _LZMA_IN_CB
-+#define _LZMA_OUT_READ
-+#include "LzmaDecode.h"
-+#ifndef CONFIG_LZMA_INITRD
-+ #include "LzmaDecode.c"
-+#endif
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize)
-+{
-+ static unsigned char val;
-+ *bufferSize = 1;
-+ val = get_byte();
-+ *buffer = &val;
-+ return LZMA_RESULT_OK;
-+}
-+
-+static int __init lzma_unzip(void)
-+{
-+ unsigned int i;
-+ CLzmaDecoderState state;
-+ unsigned char* outputbuffer;
-+ unsigned int uncompressedSize = 0;
-+ unsigned char* p;
-+ unsigned int kBlockSize = 0x10000;
-+ unsigned int nowPos = 0;
-+ unsigned int outsizeProcessed = 0;
-+ int res;
-+ ILzmaInCallback callback;
-+
-+ callback.Read = read_byte;
-+
-+ // lzma args
-+ i = get_byte();
-+ state.Properties.lc = i % 9, i = i / 9;
-+ state.Properties.lp = i % 5, state.Properties.pb = i / 5;
-+
-+ // read dictionary size
-+ p = (char*)&state.Properties.DictionarySize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ // get uncompressedSize
-+ p= (char*)&uncompressedSize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ // skip big file
-+ for (i = 0; i < 4; i++)
-+ get_byte();
-+
-+ printk( KERN_NOTICE "initramfs: LZMA lc=%d,lp=%d,pb=%d,dictSize=%d,origSize=%d\n",
-+ state.Properties.lc,state.Properties.lp,state.Properties.pb,state.Properties.DictionarySize, uncompressedSize);
-+ outputbuffer = kmalloc(kBlockSize, GFP_KERNEL);
-+ if (outputbuffer == 0) {
-+ printk(KERN_ERR "initramfs: Couldn't allocate lzma output buffer\n");
-+ return -1;
-+ }
-+
-+ state.Probs = (CProb*) kmalloc( LzmaGetNumProbs(&state.Properties)*sizeof(CProb), GFP_KERNEL);
-+ if ( state.Probs == 0) {
-+ printk(KERN_ERR "initramfs: Couldn't allocate lzma workspace\n");
-+ return -1;
-+ }
-+
-+#ifdef CONFIG_LZMA_INITRAM_FS_KMALLOC_ONLY
-+ state.Dictionary = kmalloc( state.Properties.DictionarySize, GFP_KERNEL);
-+#else
-+ state.Dictionary = vmalloc( state.Properties.DictionarySize);
-+#endif
-+ if ( state.Dictionary == 0) {
-+ printk(KERN_ERR "initramfs: Couldn't allocate lzma dictionary\n");
-+ return -1;
-+ }
-+
-+ printk( KERN_NOTICE "LZMA initramfs by Ming-Ching Tiew <mctiew@yahoo.com> " );
-+
-+ LzmaDecoderInit( &state );
-+
-+ for( nowPos =0; nowPos < uncompressedSize ; )
-+ {
-+ UInt32 blockSize = uncompressedSize - nowPos;
-+ if( blockSize > kBlockSize)
-+ blockSize = kBlockSize;
-+ res = LzmaDecode( &state, &callback, outputbuffer, blockSize, &outsizeProcessed);
-+ if( res != 0 ) {
-+ panic( KERN_ERR "initramfs: Lzma decode failure\n");
-+ return -1;
-+ }
-+ if( outsizeProcessed == 0 )
-+ {
-+ uncompressedSize = nowPos;
-+ printk( KERN_NOTICE "initramfs: nowPos=%d, uncompressedSize=%d\n",
-+ nowPos, uncompressedSize );
-+ break;
-+ }
-+ flush_buffer(outputbuffer, outsizeProcessed);
-+ nowPos += outsizeProcessed;
-+ printk( ".");
-+ }
-+
-+#ifdef CONFIG_LZMA_INITRAM_FS_KMALLOC_ONLY
-+ kfree(state.Dictionary);
-+#else
-+ vfree(state.Dictionary);
-+#endif
-+ kfree(outputbuffer);
-+ kfree(state.Probs);
-+ return 0;
-+}
-+
-+#endif /*CONFIG LZMA_INITRAM_FS*/
-+
- static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
- {
- int written;
-@@ -475,12 +588,31 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
- inptr = 0;
- outcnt = 0; /* bytes in output buffer */
- bytes_out = 0;
-- crc = (ulg)0xffffffffL; /* shift register contents */
-- makecrc();
-- gunzip();
-- if (state != Reset)
-+ if( inbuf[0] == 037 && ((inbuf[1] == 0213) || (inbuf[1] == 0236)))
-+ {
-+ printk( KERN_NOTICE "detected gzip initramfs\n");
-+ crc = (ulg)0xffffffffL; /* shift register contents */
-+ makecrc();
-+ gunzip();
-+ if (state != Reset)
- error("junk in gzipped archive");
-- this_header = saved_offset + inptr;
-+ }
-+#ifdef CONFIG_LZMA_INITRAM_FS
-+ else if( inbuf[0] < 9 * 5 * 5 && buf[9] == 0 && buf[10] == 0
-+ && buf[11] == 0 && buf[12] == 0 )
-+ {
-+ printk( KERN_NOTICE "detected lzma initramfs\n");
-+ lzma_unzip();
-+ }
-+#endif
-+ else
-+ {
-+ // skip forward ?
-+ crc = (ulg)0xffffffffL; /* shift register contents */
-+ makecrc();
-+ gunzip();
-+ }
-+ this_header = saved_offset + inptr;
- buf += inptr;
- len -= inptr;
- }
-diff --git a/kernel/Makefile b/kernel/Makefile
-index ac6b27a..bd498a2 100644
---- a/kernel/Makefile
-+++ b/kernel/Makefile
-@@ -66,7 +66,7 @@ $(obj)/configs.o: $(obj)/config_data.h
- # config_data.h contains the same information as ikconfig.h but gzipped.
- # Info from config_data can be extracted from /proc/config*
- targets += config_data.gz
--$(obj)/config_data.gz: .config FORCE
-+$(obj)/config_data.gz: .miniconfig FORCE
- $(call if_changed,gzip)
-
- quiet_cmd_ikconfiggz = IKCFG $@
-diff --git a/kernel/configs.c b/kernel/configs.c
-index 8fa1fb2..c8407eb 100644
---- a/kernel/configs.c
-+++ b/kernel/configs.c
-@@ -88,7 +88,7 @@ static int __init ikconfig_init(void)
- struct proc_dir_entry *entry;
-
- /* create the current config file */
-- entry = create_proc_entry("config.gz", S_IFREG | S_IRUGO,
-+ entry = create_proc_entry("miniconfig.gz", S_IFREG | S_IRUGO,
- &proc_root);
- if (!entry)
- return -ENOMEM;
-@@ -104,7 +104,7 @@ static int __init ikconfig_init(void)
-
- static void __exit ikconfig_cleanup(void)
- {
-- remove_proc_entry("config.gz", &proc_root);
-+ remove_proc_entry("miniconfig.gz", &proc_root);
- }
-
- module_init(ikconfig_init);
-diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
-index fe5c7db..a5150e6 100644
---- a/kernel/time/clocksource.c
-+++ b/kernel/time/clocksource.c
-@@ -85,8 +85,8 @@ static void clocksource_ratewd(struct clocksource *cs, int64_t delta)
- if (delta > -WATCHDOG_TRESHOLD && delta < WATCHDOG_TRESHOLD)
- return;
-
-- printk(KERN_WARNING "Clocksource %s unstable (delta = %Ld ns)\n",
-- cs->name, delta);
-+/* printk(KERN_WARNING "Clocksource %s unstable (delta = %Ld ns)\n",
-+ cs->name, delta); */
- cs->flags &= ~(CLOCK_SOURCE_VALID_FOR_HRES | CLOCK_SOURCE_WATCHDOG);
- clocksource_change_rating(cs, 0);
- cs->flags &= ~CLOCK_SOURCE_WATCHDOG;
-diff --git a/kernel/timer.c b/kernel/timer.c
-index dd6c2c1..3a8f485 100644
---- a/kernel/timer.c
-+++ b/kernel/timer.c
-@@ -916,8 +916,8 @@ static void change_clocksource(void)
-
- tick_clock_notify();
-
-- printk(KERN_INFO "Time: %s clocksource has been installed.\n",
-- clock->name);
-+/* printk(KERN_INFO "Time: %s clocksource has been installed.\n",
-+ clock->name); */
- }
- #else
- static inline void change_clocksource(void) { }
-diff --git a/miniconfig.sh b/miniconfig.sh
-new file mode 100755
-index 0000000..28e7433
---- /dev/null
-+++ b/miniconfig.sh
-@@ -0,0 +1,2 @@
-+#!/bin/sh -f
-+make allnoconfig KCONFIG_ALLCONFIG=.miniconfig
-diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
-index fc498fe..e98172c 100644
---- a/scripts/Makefile.lib
-+++ b/scripts/Makefile.lib
-@@ -162,4 +162,9 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
- quiet_cmd_gzip = GZIP $@
- cmd_gzip = gzip -f -9 < $< > $@
-
-+# LZMA
-+#
-+quiet_cmd_lzma = LZMA $@
-+cmd_lzma = lzma e $< $@ -lc7 -lp0 -pb0 2>/dev/null
-+
-
-diff --git a/scripts/gen_lzma_initramfs_list.sh b/scripts/gen_lzma_initramfs_list.sh
-new file mode 100644
-index 0000000..be3ed6a
---- /dev/null
-+++ b/scripts/gen_lzma_initramfs_list.sh
-@@ -0,0 +1,292 @@
-+#!/bin/bash
-+# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
-+# Copyright (c) 2006 Sam Ravnborg <sam@ravnborg.org>
-+#
-+# Released under the terms of the GNU GPL
-+#
-+# Generate a cpio packed initramfs. It uses gen_init_cpio to generate
-+# the cpio archive, and gzip to pack it.
-+# The script may also be used to generate the inputfile used for gen_init_cpio
-+# This script assumes that gen_init_cpio is located in usr/ directory
-+
-+# error out on errors
-+set -e
-+
-+usage() {
-+cat << EOF
-+Usage:
-+$0 [-o <file>] [-u <uid>] [-g <gid>] { -s | -d | <cpio_source>} ...
-+ -o <file> Create lzma initramfs file named <file> using
-+ gen_init_cpio and lzma
-+ -u <uid> User ID to map to user ID 0 (root).
-+ <uid> is only meaningful if <cpio_source>
-+ is a directory.
-+ -g <gid> Group ID to map to group ID 0 (root).
-+ <gid> is only meaningful if <cpio_source>
-+ is a directory.
-+ <cpio_source> File list or directory for cpio archive.
-+ If <cpio_source> is a .cpio file it will be used
-+ as direct input to initramfs.
-+ -s Create lzma file with small dictionary size
-+ -d Output the default cpio list.
-+
-+All options except -o and -l may be repeated and are interpreted
-+sequentially and immediately. -u and -g states are preserved across
-+<cpio_source> options so an explicit "-u 0 -g 0" is required
-+to reset the root/group mapping.
-+EOF
-+}
-+
-+list_default_initramfs() {
-+ # echo usr/kinit/kinit
-+ :
-+}
-+
-+default_initramfs() {
-+ cat <<-EOF >> ${output}
-+ # This is a very simple, default initramfs
-+
-+ dir /dev 0755 0 0
-+ nod /dev/console 0600 0 0 c 5 1
-+ dir /root 0700 0 0
-+ # file /kinit usr/kinit/kinit 0755 0 0
-+ # slink /init kinit 0755 0 0
-+ EOF
-+}
-+
-+filetype() {
-+ local argv1="$1"
-+
-+ # symlink test must come before file test
-+ if [ -L "${argv1}" ]; then
-+ echo "slink"
-+ elif [ -f "${argv1}" ]; then
-+ echo "file"
-+ elif [ -d "${argv1}" ]; then
-+ echo "dir"
-+ elif [ -b "${argv1}" -o -c "${argv1}" ]; then
-+ echo "nod"
-+ elif [ -p "${argv1}" ]; then
-+ echo "pipe"
-+ elif [ -S "${argv1}" ]; then
-+ echo "sock"
-+ else
-+ echo "invalid"
-+ fi
-+ return 0
-+}
-+
-+list_print_mtime() {
-+ :
-+}
-+
-+print_mtime() {
-+ local my_mtime="0"
-+
-+ if [ -e "$1" ]; then
-+ my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
-+ fi
-+
-+ echo "# Last modified: ${my_mtime}" >> ${output}
-+ echo "" >> ${output}
-+}
-+
-+list_parse() {
-+ echo "$1 \\"
-+}
-+
-+# for each file print a line in following format
-+# <filetype> <name> <path to file> <octal mode> <uid> <gid>
-+# for links, devices etc the format differs. See gen_init_cpio for details
-+parse() {
-+ local location="$1"
-+ local name="${location/${srcdir}//}"
-+ # change '//' into '/'
-+ name="${name//\/\///}"
-+ local mode="$2"
-+ local uid="$3"
-+ local gid="$4"
-+ local ftype=$(filetype "${location}")
-+ # remap uid/gid to 0 if necessary
-+ [ "$uid" -eq "$root_uid" ] && uid=0
-+ [ "$gid" -eq "$root_gid" ] && gid=0
-+ local str="${mode} ${uid} ${gid}"
-+
-+ [ "${ftype}" == "invalid" ] && return 0
-+ [ "${location}" == "${srcdir}" ] && return 0
-+
-+ case "${ftype}" in
-+ "file")
-+ str="${ftype} ${name} ${location} ${str}"
-+ ;;
-+ "nod")
-+ local dev_type=
-+ local maj=$(LC_ALL=C ls -l "${location}" | \
-+ gawk '{sub(/,/, "", $5); print $5}')
-+ local min=$(LC_ALL=C ls -l "${location}" | \
-+ gawk '{print $6}')
-+
-+ if [ -b "${location}" ]; then
-+ dev_type="b"
-+ else
-+ dev_type="c"
-+ fi
-+ str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}"
-+ ;;
-+ "slink")
-+ local target=$(LC_ALL=C ls -l "${location}" | \
-+ gawk '{print $11}')
-+ str="${ftype} ${name} ${target} ${str}"
-+ ;;
-+ *)
-+ str="${ftype} ${name} ${str}"
-+ ;;
-+ esac
-+
-+ echo "${str}" >> ${output}
-+
-+ return 0
-+}
-+
-+unknown_option() {
-+ printf "ERROR: unknown option \"$arg\"\n" >&2
-+ printf "If the filename validly begins with '-', " >&2
-+ printf "then it must be prefixed\n" >&2
-+ printf "by './' so that it won't be interpreted as an option." >&2
-+ printf "\n" >&2
-+ usage >&2
-+ exit 1
-+}
-+
-+list_header() {
-+ :
-+}
-+
-+header() {
-+ printf "\n#####################\n# $1\n" >> ${output}
-+}
-+
-+# process one directory (incl sub-directories)
-+dir_filelist() {
-+ ${dep_list}header "$1"
-+
-+ srcdir=$(echo "$1" | sed -e 's://*:/:g')
-+ dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" 2>/dev/null)
-+
-+ # If $dirlist is only one line, then the directory is empty
-+ if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
-+ ${dep_list}print_mtime "$1"
-+
-+ echo "${dirlist}" | \
-+ while read x; do
-+ ${dep_list}parse ${x}
-+ done
-+ fi
-+}
-+
-+# if only one file is specified and it is .cpio file then use it direct as fs
-+# if a directory is specified then add all files in given direcotry to fs
-+# if a regular file is specified assume it is in gen_initramfs format
-+input_file() {
-+ source="$1"
-+ if [ -f "$1" ]; then
-+ ${dep_list}header "$1"
-+ is_cpio="$(echo "$1" | sed 's/^.*\.cpio/cpio/')"
-+ if [ $2 -eq 0 -a ${is_cpio} == "cpio" ]; then
-+ cpio_file=$1
-+ [ ! -z ${dep_list} ] && echo "$1"
-+ return 0
-+ fi
-+ if [ -z ${dep_list} ]; then
-+ print_mtime "$1" >> ${output}
-+ cat "$1" >> ${output}
-+ else
-+ cat "$1" | while read type dir file perm ; do
-+ if [ "$type" == "file" ]; then
-+ echo "$file \\";
-+ fi
-+ done
-+ fi
-+ elif [ -d "$1" ]; then
-+ dir_filelist "$1"
-+ else
-+ echo " ${prog}: Cannot open '$1'" >&2
-+ exit 1
-+ fi
-+}
-+
-+prog=$0
-+root_uid=0
-+root_gid=0
-+dep_list=
-+cpio_file=
-+cpio_list=
-+output="/dev/stdout"
-+output_file=""
-+opt=""
-+
-+arg="$1"
-+case "$arg" in
-+ "-l") # files included in initramfs - used by kbuild
-+ dep_list="list_"
-+ echo "deps_initramfs := \\"
-+ shift
-+ ;;
-+ "-o") # generate lzma-ed cpio image named $1
-+ shift
-+ output_file="$1"
-+ cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
-+ output=${cpio_list}
-+ shift
-+ ;;
-+esac
-+while [ $# -gt 0 ]; do
-+ arg="$1"
-+ shift
-+ case "$arg" in
-+ "-u") # map $1 to uid=0 (root)
-+ root_uid="$1"
-+ shift
-+ ;;
-+ "-g") # map $1 to gid=0 (root)
-+ root_gid="$1"
-+ shift
-+ ;;
-+ "-s")
-+ opt="-d16"
-+ ;;
-+ "-d") # display default initramfs list
-+ default_list="$arg"
-+ ${dep_list}default_initramfs
-+ ;;
-+ "-h")
-+ usage
-+ exit 0
-+ ;;
-+ *)
-+ case "$arg" in
-+ "-"*)
-+ unknown_option
-+ ;;
-+ *) # input file/dir - process it
-+ input_file "$arg" "$#"
-+ ;;
-+ esac
-+ ;;
-+ esac
-+done
-+
-+# If output_file is set we will generate cpio archive and lzma it
-+# we are carefull to delete tmp files
-+if [ ! -z ${output_file} ]; then
-+ if [ -z ${cpio_file} ]; then
-+ cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
-+ usr/gen_init_cpio ${cpio_list} > ${cpio_tfile}
-+ else
-+ cpio_tfile=${cpio_file}
-+ fi
-+ rm ${cpio_list}
-+ lzma e ${cpio_tfile} ${output_file} ${opt}
-+ [ -z ${cpio_file} ] && rm ${cpio_tfile}
-+fi
-+exit 0
-diff --git a/shrinkconfig.sh b/shrinkconfig.sh
-new file mode 100755
-index 0000000..e7a3df7
---- /dev/null
-+++ b/shrinkconfig.sh
-@@ -0,0 +1,79 @@
-+#! /bin/bash
-+
-+# shrinkconfig copyright 2006 by Rob Landley <rob@landley.net>
-+# Licensed under the GNU General Public License version 2.
-+
-+if [ $# -ne 1 ]
-+then
-+ echo "Turns current .config into a miniconfig file."
-+ echo "Usage: shrinkconfig mini.config"
-+ exit 1
-+fi
-+
-+if [ ! -f .config ]
-+then
-+ echo "Need a .config file to shrink."
-+ exit 1
-+fi
-+LENGTH=$(wc -l < .config)
-+
-+OUTPUT="$1"
-+cp .config "$OUTPUT"
-+if [ $? -ne 0 ]
-+then
-+ echo "Couldn't create $OUTPUT"
-+ exit 1
-+fi
-+
-+# If we get interrupted, clean up the mess
-+
-+KERNELOUTPUT=""
-+
-+function cleanup
-+{
-+ echo
-+ echo "Interrupted."
-+ [ ! -z "$KERNELOUTPUT" ] && rm -rf "$KERNELOUTPUT"
-+ rm "$OUTPUT"
-+ exit 1
-+}
-+
-+trap cleanup HUP INT QUIT TERM
-+
-+# Since the "O=" argument to make doesn't work recursively, we need to jump
-+# through a few hoops to avoid overwriting the .config that we're shrinking.
-+
-+# If we're building out of tree, we'll have absolute paths to source and build
-+# directories in the Makefile.
-+
-+KERNELSRC=$(sed -n -e 's/KERNELSRC[^/]*:=[^/]*//p' Makefile)
-+[ -z "$KERNELSRC" ] && KERNELSRC=$(pwd)
-+KERNELOUTPUT=`pwd`/.config.minitemp
-+
-+mkdir -p "$KERNELOUTPUT" || exit 1
-+
-+echo "Shrinking .config to $OUTPUT..."
-+
-+for I in $(seq 1 $LENGTH)
-+do
-+ echo -n -e "\r"$I/$LENGTH lines $(wc -c < "$OUTPUT") bytes
-+
-+ sed -n "${I}!p" "$OUTPUT" > "$KERNELOUTPUT"/.config.test
-+ # Do a config with this file
-+ make -C "$KERNELSRC" O="$KERNELOUTPUT" allnoconfig KCONFIG_ALLCONFIG="$KERNELOUTPUT"/.config.test > /dev/null
-+
-+ # Compare. The date changes, so expect a small difference each time.
-+ D=$(diff "$KERNELOUTPUT"/.config .config | wc -l)
-+ if [ $D -eq 4 ]
-+ then
-+ mv "$KERNELOUTPUT"/.config.test "$OUTPUT"
-+ LENGTH=$[$LENGTH-1]
-+ else
-+ I=$[$I + 1]
-+ fi
-+done
-+
-+rm -rf "$KERNELOUTPUT"
-+
-+# One extra echo to preserve status line.
-+echo
-diff --git a/usr/Makefile b/usr/Makefile
-index 201f27f..8e1f6ea 100644
---- a/usr/Makefile
-+++ b/usr/Makefile
-@@ -19,6 +19,7 @@ $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE
-
- hostprogs-y := gen_init_cpio
- initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
-+lzma_initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_lzma_initramfs_list.sh
- ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
- $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
- ramfs-args := \
-@@ -36,6 +37,14 @@ endif
- quiet_cmd_initfs = GEN $@
- cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
-
-+ifdef CONFIG_LZMA_INITRAM_FS_SMALLMEM
-+quiet_cmd_lzma_initfs = LZRAMFS $@
-+ cmd_lzma_initfs = $(lzma_initramfs) -o $@ $(ramfs-args) -s $(ramfs-input)
-+else
-+quiet_cmd_lzma_initfs = LZRAMFS $@
-+ cmd_lzma_initfs = $(lzma_initramfs) -o $@ $(ramfs-args) $(ramfs-input)
-+endif
-+
- targets := initramfs_data.cpio.gz
- # do not try to update files included in initramfs
- $(deps_initramfs): ;
-@@ -48,5 +57,9 @@ $(deps_initramfs): klibcdirs
- # 4) arguments to gen_initramfs.sh changes
- $(obj)/initramfs_data.cpio.gz: $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
- $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.gz.d
-+ifdef CONFIG_LZMA_INITRAM_FS
-+ $(call if_changed,lzma_initfs)
-+else
- $(call if_changed,initfs)
-+endif
-
+++ /dev/null
-diff -rdup linux-2.6.21.5.oorig/arch/i386/boot/compressed/Makefile linux-2.6.21.5/arch/i386/boot/compressed/Makefile
---- linux-2.6.21.5.oorig/arch/i386/boot/compressed/Makefile 2007-07-24 13:08:51.000000000 +0200
-+++ linux-2.6.21.5/arch/i386/boot/compressed/Makefile 2007-07-24 14:54:38.000000000 +0200
-@@ -4,7 +4,7 @@
- # create a compressed vmlinux image from the original vmlinux
- #
-
--tragets := head.o lzma_misc.o piggy.o \
-+targets := head.o lzma_misc.o piggy.o \
- vmlinux.bin.all vmlinux.relocs \
- vmlinux vmlinux.bin vmlinux.bin.gz
- EXTRA_AFLAGS := -traditional
-diff -rdup linux-2.6.21.5.oorig/scripts/gen_lzma_initramfs_list.sh linux-2.6.21.5/scripts/gen_lzma_initramfs_list.sh
---- linux-2.6.21.5.oorig/scripts/gen_lzma_initramfs_list.sh 2007-07-24 13:08:51.000000000 +0200
-+++ linux-2.6.21.5/scripts/gen_lzma_initramfs_list.sh 2007-07-24 15:12:10.000000000 +0200
-@@ -253,7 +253,7 @@ while [ $# -gt 0 ]; do
- shift
- ;;
- "-s")
-- opt="-d16"
-+ #opt="-d16" ? what was that supposed to do?
- ;;
- "-d") # display default initramfs list
- default_list="$arg"
-@@ -286,7 +286,7 @@ if [ ! -z ${output_file} ]; then
- cpio_tfile=${cpio_file}
- fi
- rm ${cpio_list}
-- lzma e ${cpio_tfile} ${output_file} ${opt}
-+ lzma -z ${cpio_tfile} ${opt} -c > ${output_file}
- [ -z ${cpio_file} ] && rm ${cpio_tfile}
- fi
- exit 0
---- linux-2.6.21.5.oorig/arch/i386/boot/compressed/lzma_misc.c 2007-07-24 15:24:44.000000000 +0200
-+++ linux-2.6.21.5/arch/i386/boot/compressed/lzma_misc.c 2007-07-24 17:09:40.000000000 +0200
-@@ -241,7 +241,6 @@ static int lzma_unzip(uch* output)
-
- static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize)
- {
-- static unsigned int i = 0;
- static unsigned char val;
- *bufferSize = 1;
- val = get_byte();
---- linux-2.6.21.5.oorig/scripts/Makefile.lib 2007-07-24 15:24:44.000000000 +0200
-+++ linux-2.6.21.5/scripts/Makefile.lib 2007-07-24 18:03:57.000000000 +0200
-@@ -165,6 +165,7 @@ cmd_gzip = gzip -f -9 < $< > $@
- # LZMA
- #
- quiet_cmd_lzma = LZMA $@
--cmd_lzma = lzma e $< $@ -lc7 -lp0 -pb0 2>/dev/null
-+#cmd_lzma = lzma e $< $@ -lc7 -lp0 -pb0 2>/dev/null
-+cmd_lzma = lzma -z $< -c > $@
-
-
+++ /dev/null
-diff -rduNp linux-2.6.22.1.oorig/.miniconfig linux-2.6.22.1/.miniconfig
---- linux-2.6.22.1.oorig/.miniconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/.miniconfig 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,89 @@
-+#make allnoconfig KCONFIG_ALLCONFIG=miniconfig
-+CONFIG_X86_32=y
-+CONFIG_CLOCKSOURCE_WATCHDOG=y
-+CONFIG_LOCKDEP_SUPPORT=y
-+CONFIG_SEMAPHORE_SLEEPERS=y
-+CONFIG_MMU=y
-+CONFIG_GENERIC_ISA_DMA=y
-+CONFIG_GENERIC_HWEIGHT=y
-+CONFIG_DMI=y
-+CONFIG_INIT_ENV_ARG_LIMIT=32
-+CONFIG_IKCONFIG=y
-+CONFIG_IKCONFIG_PROC=y
-+CONFIG_SYSFS_DEPRECATED=y
-+CONFIG_BLK_DEV_INITRD=y
-+CONFIG_SYSCTL=y
-+CONFIG_EMBEDDED=y
-+CONFIG_PRINTK=y
-+CONFIG_BASE_SMALL=1
-+CONFIG_BLOCK=y
-+CONFIG_IOSCHED_NOOP=y
-+CONFIG_DEFAULT_IOSCHED="noop"
-+CONFIG_X86_GENERIC=y
-+CONFIG_X86_L1_CACHE_SHIFT=7
-+CONFIG_GENERIC_CALIBRATE_DELAY=y
-+CONFIG_X86_WP_WORKS_OK=y
-+CONFIG_X86_BSWAP=y
-+CONFIG_X86_CMPXCHG64=y
-+CONFIG_X86_INTEL_USERCOPY=y
-+CONFIG_X86_TSC=y
-+CONFIG_PREEMPT_NONE=y
-+CONFIG_VM86=y
-+CONFIG_HIGHMEM=y
-+CONFIG_FLATMEM=y
-+CONFIG_MTRR=y
-+CONFIG_HZ_250=y
-+CONFIG_PHYSICAL_ALIGN=0x100000
-+CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
-+CONFIG_PM=y
-+CONFIG_ACPI=y
-+CONFIG_ACPI_SLEEP=y
-+CONFIG_ACPI_BLACKLIST_YEAR=0
-+CONFIG_ACPI_EC=y
-+CONFIG_ACPI_SYSTEM=y
-+CONFIG_PCI=y
-+CONFIG_PCI_GOANY=y
-+CONFIG_PCI_DIRECT=y
-+CONFIG_BINFMT_ELF=y
-+CONFIG_STANDALONE=y
-+CONFIG_BLK_DEV_LOOP=y
-+CONFIG_IDE=y
-+CONFIG_IDE_MAX_HWIFS=2
-+CONFIG_BLK_DEV_IDE=y
-+CONFIG_BLK_DEV_IDEDISK=y
-+CONFIG_IDEDISK_MULTI_MODE=y
-+CONFIG_BLK_DEV_IDECD=y
-+CONFIG_IDE_GENERIC=y
-+CONFIG_INPUT_MOUSEDEV=y
-+CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
-+CONFIG_INPUT_KEYBOARD=y
-+CONFIG_KEYBOARD_ATKBD=y
-+CONFIG_SERIO=y
-+CONFIG_VT=y
-+CONFIG_VT_CONSOLE=y
-+CONFIG_UNIX98_PTYS=y
-+CONFIG_VGA_CONSOLE=y
-+CONFIG_USB_ARCH_HAS_HCD=y
-+CONFIG_USB_ARCH_HAS_EHCI=y
-+CONFIG_EXT2_FS=y
-+CONFIG_DNOTIFY=y
-+CONFIG_ISO9660_FS=y
-+CONFIG_FAT_FS=y
-+CONFIG_VFAT_FS=y
-+CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
-+CONFIG_PROC_FS=y
-+CONFIG_PROC_SYSCTL=y
-+CONFIG_SYSFS=y
-+CONFIG_RAMFS=y
-+CONFIG_SQUASHFS=y
-+CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3
-+CONFIG_MSDOS_PARTITION=y
-+CONFIG_NLS_DEFAULT="iso8859-1"
-+CONFIG_AUFS=y
-+CONFIG_AUFS_FAKE_DM=y
-+CONFIG_EARLY_PRINTK=y
-+CONFIG_DOUBLEFAULT=y
-+CONFIG_ZLIB_INFLATE=y
-+CONFIG_HAS_IOPORT=y
-+CONFIG_GENERIC_IRQ_PROBE=y
-+CONFIG_KTIME_SCALAR=y
-diff -rduNp linux-2.6.22.1.oorig/Makefile linux-2.6.22.1/Makefile
---- linux-2.6.22.1.oorig/Makefile 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/Makefile 2007-07-24 14:17:46.000000000 +0200
-@@ -188,7 +188,7 @@ CROSS_COMPILE ?=
- # Architecture as present in compile.h
- UTS_MACHINE := $(ARCH)
-
--KCONFIG_CONFIG ?= .config
-+KCONFIG_CONFIG ?= .miniconfig
-
- # SHELL used by kbuild
- CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
-diff -rduNp linux-2.6.22.1.oorig/arch/i386/boot/compressed/LzmaDecode.c linux-2.6.22.1/arch/i386/boot/compressed/LzmaDecode.c
---- linux-2.6.22.1.oorig/arch/i386/boot/compressed/LzmaDecode.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/arch/i386/boot/compressed/LzmaDecode.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,588 @@
-+/*
-+ LzmaDecode.c
-+ LZMA Decoder (optimized for Speed version)
-+
-+ LZMA SDK 4.22 Copyright (c) 1999-2005 Igor Pavlov (2005-06-10)
-+ http://www.7-zip.org/
-+
-+ LZMA SDK is licensed under two licenses:
-+ 1) GNU Lesser General Public License (GNU LGPL)
-+ 2) Common Public License (CPL)
-+ It means that you can select one of these two licenses and
-+ follow rules of that license.
-+
-+ SPECIAL EXCEPTION:
-+ Igor Pavlov, as the author of this Code, expressly permits you to
-+ statically or dynamically link your Code (or bind by name) to the
-+ interfaces of this file without subjecting your linked Code to the
-+ terms of the CPL or GNU LGPL. Any modifications or additions
-+ to this file, however, are subject to the LGPL or CPL terms.
-+*/
-+
-+#include "LzmaDecode.h"
-+
-+#ifndef Byte
-+#define Byte unsigned char
-+#endif
-+
-+#define kNumTopBits 24
-+#define kTopValue ((UInt32)1 << kNumTopBits)
-+
-+#define kNumBitModelTotalBits 11
-+#define kBitModelTotal (1 << kNumBitModelTotalBits)
-+#define kNumMoveBits 5
-+
-+#define RC_READ_BYTE (*Buffer++)
-+
-+#define RC_INIT2 Code = 0; Range = 0xFFFFFFFF; \
-+ { int i; for(i = 0; i < 5; i++) { RC_TEST; Code = (Code << 8) | RC_READ_BYTE; }}
-+
-+#ifdef _LZMA_IN_CB
-+
-+#define RC_TEST { if (Buffer == BufferLim) \
-+ { SizeT size; int result = InCallback->Read(InCallback, &Buffer, &size); if (result != LZMA_RESULT_OK) return result; \
-+ BufferLim = Buffer + size; if (size == 0) return LZMA_RESULT_DATA_ERROR; }}
-+
-+#define RC_INIT Buffer = BufferLim = 0; RC_INIT2
-+
-+#else
-+
-+#define RC_TEST { if (Buffer == BufferLim) return LZMA_RESULT_DATA_ERROR; }
-+
-+#define RC_INIT(buffer, bufferSize) Buffer = buffer; BufferLim = buffer + bufferSize; RC_INIT2
-+
-+#endif
-+
-+#define RC_NORMALIZE if (Range < kTopValue) { RC_TEST; Range <<= 8; Code = (Code << 8) | RC_READ_BYTE; }
-+
-+#define IfBit0(p) RC_NORMALIZE; bound = (Range >> kNumBitModelTotalBits) * *(p); if (Code < bound)
-+#define UpdateBit0(p) Range = bound; *(p) += (kBitModelTotal - *(p)) >> kNumMoveBits;
-+#define UpdateBit1(p) Range -= bound; Code -= bound; *(p) -= (*(p)) >> kNumMoveBits;
-+
-+#define RC_GET_BIT2(p, mi, A0, A1) IfBit0(p) \
-+ { UpdateBit0(p); mi <<= 1; A0; } else \
-+ { UpdateBit1(p); mi = (mi + mi) + 1; A1; }
-+
-+#define RC_GET_BIT(p, mi) RC_GET_BIT2(p, mi, ; , ;)
-+
-+#define RangeDecoderBitTreeDecode(probs, numLevels, res) \
-+ { int i = numLevels; res = 1; \
-+ do { CProb *p = probs + res; RC_GET_BIT(p, res) } while(--i != 0); \
-+ res -= (1 << numLevels); }
-+
-+
-+#define kNumPosBitsMax 4
-+#define kNumPosStatesMax (1 << kNumPosBitsMax)
-+
-+#define kLenNumLowBits 3
-+#define kLenNumLowSymbols (1 << kLenNumLowBits)
-+#define kLenNumMidBits 3
-+#define kLenNumMidSymbols (1 << kLenNumMidBits)
-+#define kLenNumHighBits 8
-+#define kLenNumHighSymbols (1 << kLenNumHighBits)
-+
-+#define LenChoice 0
-+#define LenChoice2 (LenChoice + 1)
-+#define LenLow (LenChoice2 + 1)
-+#define LenMid (LenLow + (kNumPosStatesMax << kLenNumLowBits))
-+#define LenHigh (LenMid + (kNumPosStatesMax << kLenNumMidBits))
-+#define kNumLenProbs (LenHigh + kLenNumHighSymbols)
-+
-+
-+#define kNumStates 12
-+#define kNumLitStates 7
-+
-+#define kStartPosModelIndex 4
-+#define kEndPosModelIndex 14
-+#define kNumFullDistances (1 << (kEndPosModelIndex >> 1))
-+
-+#define kNumPosSlotBits 6
-+#define kNumLenToPosStates 4
-+
-+#define kNumAlignBits 4
-+#define kAlignTableSize (1 << kNumAlignBits)
-+
-+#define kMatchMinLen 2
-+
-+#define IsMatch 0
-+#define IsRep (IsMatch + (kNumStates << kNumPosBitsMax))
-+#define IsRepG0 (IsRep + kNumStates)
-+#define IsRepG1 (IsRepG0 + kNumStates)
-+#define IsRepG2 (IsRepG1 + kNumStates)
-+#define IsRep0Long (IsRepG2 + kNumStates)
-+#define PosSlot (IsRep0Long + (kNumStates << kNumPosBitsMax))
-+#define SpecPos (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))
-+#define Align (SpecPos + kNumFullDistances - kEndPosModelIndex)
-+#define LenCoder (Align + kAlignTableSize)
-+#define RepLenCoder (LenCoder + kNumLenProbs)
-+#define Literal (RepLenCoder + kNumLenProbs)
-+
-+#if Literal != LZMA_BASE_SIZE
-+StopCompilingDueBUG
-+#endif
-+
-+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size)
-+{
-+ unsigned char prop0;
-+ if (size < LZMA_PROPERTIES_SIZE)
-+ return LZMA_RESULT_DATA_ERROR;
-+ prop0 = propsData[0];
-+ if (prop0 >= (9 * 5 * 5))
-+ return LZMA_RESULT_DATA_ERROR;
-+ {
-+ for (propsRes->pb = 0; prop0 >= (9 * 5); propsRes->pb++, prop0 -= (9 * 5));
-+ for (propsRes->lp = 0; prop0 >= 9; propsRes->lp++, prop0 -= 9);
-+ propsRes->lc = prop0;
-+ /*
-+ unsigned char remainder = (unsigned char)(prop0 / 9);
-+ propsRes->lc = prop0 % 9;
-+ propsRes->pb = remainder / 5;
-+ propsRes->lp = remainder % 5;
-+ */
-+ }
-+
-+ #ifdef _LZMA_OUT_READ
-+ {
-+ int i;
-+ propsRes->DictionarySize = 0;
-+ for (i = 0; i < 4; i++)
-+ propsRes->DictionarySize += (UInt32)(propsData[1 + i]) << (i * 8);
-+ if (propsRes->DictionarySize == 0)
-+ propsRes->DictionarySize = 1;
-+ }
-+ #endif
-+ return LZMA_RESULT_OK;
-+}
-+
-+#define kLzmaStreamWasFinishedId (-1)
-+
-+int LzmaDecode(CLzmaDecoderState *vs,
-+ #ifdef _LZMA_IN_CB
-+ ILzmaInCallback *InCallback,
-+ #else
-+ const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
-+ #endif
-+ unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed)
-+{
-+ CProb *p = vs->Probs;
-+ SizeT nowPos = 0;
-+ Byte previousByte = 0;
-+ UInt32 posStateMask = (1 << (vs->Properties.pb)) - 1;
-+ UInt32 literalPosMask = (1 << (vs->Properties.lp)) - 1;
-+ int lc = vs->Properties.lc;
-+
-+ #ifdef _LZMA_OUT_READ
-+
-+ UInt32 Range = vs->Range;
-+ UInt32 Code = vs->Code;
-+ #ifdef _LZMA_IN_CB
-+ const Byte *Buffer = vs->Buffer;
-+ const Byte *BufferLim = vs->BufferLim;
-+ #else
-+ const Byte *Buffer = inStream;
-+ const Byte *BufferLim = inStream + inSize;
-+ #endif
-+ int state = vs->State;
-+ UInt32 rep0 = vs->Reps[0], rep1 = vs->Reps[1], rep2 = vs->Reps[2], rep3 = vs->Reps[3];
-+ int len = vs->RemainLen;
-+ UInt32 globalPos = vs->GlobalPos;
-+ UInt32 distanceLimit = vs->DistanceLimit;
-+
-+ Byte *dictionary = vs->Dictionary;
-+ UInt32 dictionarySize = vs->Properties.DictionarySize;
-+ UInt32 dictionaryPos = vs->DictionaryPos;
-+
-+ Byte tempDictionary[4];
-+
-+ #ifndef _LZMA_IN_CB
-+ *inSizeProcessed = 0;
-+ #endif
-+ *outSizeProcessed = 0;
-+ if (len == kLzmaStreamWasFinishedId)
-+ return LZMA_RESULT_OK;
-+
-+ if (dictionarySize == 0)
-+ {
-+ dictionary = tempDictionary;
-+ dictionarySize = 1;
-+ tempDictionary[0] = vs->TempDictionary[0];
-+ }
-+
-+ if (len == kLzmaNeedInitId)
-+ {
-+ {
-+ UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
-+ UInt32 i;
-+ for (i = 0; i < numProbs; i++)
-+ p[i] = kBitModelTotal >> 1;
-+ rep0 = rep1 = rep2 = rep3 = 1;
-+ state = 0;
-+ globalPos = 0;
-+ distanceLimit = 0;
-+ dictionaryPos = 0;
-+ dictionary[dictionarySize - 1] = 0;
-+ #ifdef _LZMA_IN_CB
-+ RC_INIT;
-+ #else
-+ RC_INIT(inStream, inSize);
-+ #endif
-+ }
-+ len = 0;
-+ }
-+ while(len != 0 && nowPos < outSize)
-+ {
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ outStream[nowPos++] = dictionary[dictionaryPos] = dictionary[pos];
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ len--;
-+ }
-+ if (dictionaryPos == 0)
-+ previousByte = dictionary[dictionarySize - 1];
-+ else
-+ previousByte = dictionary[dictionaryPos - 1];
-+
-+ #else /* if !_LZMA_OUT_READ */
-+
-+ int state = 0;
-+ UInt32 rep0 = 1, rep1 = 1, rep2 = 1, rep3 = 1;
-+ int len = 0;
-+ const Byte *Buffer;
-+ const Byte *BufferLim;
-+ UInt32 Range;
-+ UInt32 Code;
-+
-+ #ifndef _LZMA_IN_CB
-+ *inSizeProcessed = 0;
-+ #endif
-+ *outSizeProcessed = 0;
-+
-+ {
-+ UInt32 i;
-+ UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
-+ for (i = 0; i < numProbs; i++)
-+ p[i] = kBitModelTotal >> 1;
-+ }
-+
-+ #ifdef _LZMA_IN_CB
-+ RC_INIT;
-+ #else
-+ RC_INIT(inStream, inSize);
-+ #endif
-+
-+ #endif /* _LZMA_OUT_READ */
-+
-+ while(nowPos < outSize)
-+ {
-+ CProb *prob;
-+ UInt32 bound;
-+ int posState = (int)(
-+ (nowPos
-+ #ifdef _LZMA_OUT_READ
-+ + globalPos
-+ #endif
-+ )
-+ & posStateMask);
-+
-+ prob = p + IsMatch + (state << kNumPosBitsMax) + posState;
-+ IfBit0(prob)
-+ {
-+ int symbol = 1;
-+ UpdateBit0(prob)
-+ prob = p + Literal + (LZMA_LIT_SIZE *
-+ (((
-+ (nowPos
-+ #ifdef _LZMA_OUT_READ
-+ + globalPos
-+ #endif
-+ )
-+ & literalPosMask) << lc) + (previousByte >> (8 - lc))));
-+
-+ if (state >= kNumLitStates)
-+ {
-+ int matchByte;
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ matchByte = dictionary[pos];
-+ #else
-+ matchByte = outStream[nowPos - rep0];
-+ #endif
-+ do
-+ {
-+ int bit;
-+ CProb *probLit;
-+ matchByte <<= 1;
-+ bit = (matchByte & 0x100);
-+ probLit = prob + 0x100 + bit + symbol;
-+ RC_GET_BIT2(probLit, symbol, if (bit != 0) break, if (bit == 0) break)
-+ }
-+ while (symbol < 0x100);
-+ }
-+ while (symbol < 0x100)
-+ {
-+ CProb *probLit = prob + symbol;
-+ RC_GET_BIT(probLit, symbol)
-+ }
-+ previousByte = (Byte)symbol;
-+
-+ outStream[nowPos++] = previousByte;
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit < dictionarySize)
-+ distanceLimit++;
-+
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #endif
-+ if (state < 4) state = 0;
-+ else if (state < 10) state -= 3;
-+ else state -= 6;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRep + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ rep3 = rep2;
-+ rep2 = rep1;
-+ rep1 = rep0;
-+ state = state < kNumLitStates ? 0 : 3;
-+ prob = p + LenCoder;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRepG0 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ prob = p + IsRep0Long + (state << kNumPosBitsMax) + posState;
-+ IfBit0(prob)
-+ {
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos;
-+ #endif
-+ UpdateBit0(prob);
-+
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit == 0)
-+ #else
-+ if (nowPos == 0)
-+ #endif
-+ return LZMA_RESULT_DATA_ERROR;
-+
-+ state = state < kNumLitStates ? 9 : 11;
-+ #ifdef _LZMA_OUT_READ
-+ pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ previousByte = dictionary[pos];
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #else
-+ previousByte = outStream[nowPos - rep0];
-+ #endif
-+ outStream[nowPos++] = previousByte;
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit < dictionarySize)
-+ distanceLimit++;
-+ #endif
-+
-+ continue;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ }
-+ }
-+ else
-+ {
-+ UInt32 distance;
-+ UpdateBit1(prob);
-+ prob = p + IsRepG1 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ distance = rep1;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRepG2 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ distance = rep2;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ distance = rep3;
-+ rep3 = rep2;
-+ }
-+ rep2 = rep1;
-+ }
-+ rep1 = rep0;
-+ rep0 = distance;
-+ }
-+ state = state < kNumLitStates ? 8 : 11;
-+ prob = p + RepLenCoder;
-+ }
-+ {
-+ int numBits, offset;
-+ CProb *probLen = prob + LenChoice;
-+ IfBit0(probLen)
-+ {
-+ UpdateBit0(probLen);
-+ probLen = prob + LenLow + (posState << kLenNumLowBits);
-+ offset = 0;
-+ numBits = kLenNumLowBits;
-+ }
-+ else
-+ {
-+ UpdateBit1(probLen);
-+ probLen = prob + LenChoice2;
-+ IfBit0(probLen)
-+ {
-+ UpdateBit0(probLen);
-+ probLen = prob + LenMid + (posState << kLenNumMidBits);
-+ offset = kLenNumLowSymbols;
-+ numBits = kLenNumMidBits;
-+ }
-+ else
-+ {
-+ UpdateBit1(probLen);
-+ probLen = prob + LenHigh;
-+ offset = kLenNumLowSymbols + kLenNumMidSymbols;
-+ numBits = kLenNumHighBits;
-+ }
-+ }
-+ RangeDecoderBitTreeDecode(probLen, numBits, len);
-+ len += offset;
-+ }
-+
-+ if (state < 4)
-+ {
-+ int posSlot;
-+ state += kNumLitStates;
-+ prob = p + PosSlot +
-+ ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) <<
-+ kNumPosSlotBits);
-+ RangeDecoderBitTreeDecode(prob, kNumPosSlotBits, posSlot);
-+ if (posSlot >= kStartPosModelIndex)
-+ {
-+ int numDirectBits = ((posSlot >> 1) - 1);
-+ rep0 = (2 | ((UInt32)posSlot & 1));
-+ if (posSlot < kEndPosModelIndex)
-+ {
-+ rep0 <<= numDirectBits;
-+ prob = p + SpecPos + rep0 - posSlot - 1;
-+ }
-+ else
-+ {
-+ numDirectBits -= kNumAlignBits;
-+ do
-+ {
-+ RC_NORMALIZE
-+ Range >>= 1;
-+ rep0 <<= 1;
-+ if (Code >= Range)
-+ {
-+ Code -= Range;
-+ rep0 |= 1;
-+ }
-+ }
-+ while (--numDirectBits != 0);
-+ prob = p + Align;
-+ rep0 <<= kNumAlignBits;
-+ numDirectBits = kNumAlignBits;
-+ }
-+ {
-+ int i = 1;
-+ int mi = 1;
-+ do
-+ {
-+ CProb *prob3 = prob + mi;
-+ RC_GET_BIT2(prob3, mi, ; , rep0 |= i);
-+ i <<= 1;
-+ }
-+ while(--numDirectBits != 0);
-+ }
-+ }
-+ else
-+ rep0 = posSlot;
-+ if (++rep0 == (UInt32)(0))
-+ {
-+ /* it's for stream version */
-+ len = kLzmaStreamWasFinishedId;
-+ break;
-+ }
-+ }
-+
-+ len += kMatchMinLen;
-+ #ifdef _LZMA_OUT_READ
-+ if (rep0 > distanceLimit)
-+ #else
-+ if (rep0 > nowPos)
-+ #endif
-+ return LZMA_RESULT_DATA_ERROR;
-+
-+ #ifdef _LZMA_OUT_READ
-+ if (dictionarySize - distanceLimit > (UInt32)len)
-+ distanceLimit += len;
-+ else
-+ distanceLimit = dictionarySize;
-+ #endif
-+
-+ do
-+ {
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ previousByte = dictionary[pos];
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #else
-+ previousByte = outStream[nowPos - rep0];
-+ #endif
-+ len--;
-+ outStream[nowPos++] = previousByte;
-+ }
-+ while(len != 0 && nowPos < outSize);
-+ }
-+ }
-+ RC_NORMALIZE;
-+
-+ #ifdef _LZMA_OUT_READ
-+ vs->Range = Range;
-+ vs->Code = Code;
-+ vs->DictionaryPos = dictionaryPos;
-+ vs->GlobalPos = globalPos + (UInt32)nowPos;
-+ vs->DistanceLimit = distanceLimit;
-+ vs->Reps[0] = rep0;
-+ vs->Reps[1] = rep1;
-+ vs->Reps[2] = rep2;
-+ vs->Reps[3] = rep3;
-+ vs->State = state;
-+ vs->RemainLen = len;
-+ vs->TempDictionary[0] = tempDictionary[0];
-+ #endif
-+
-+ #ifdef _LZMA_IN_CB
-+ vs->Buffer = Buffer;
-+ vs->BufferLim = BufferLim;
-+ #else
-+ *inSizeProcessed = (SizeT)(Buffer - inStream);
-+ #endif
-+ *outSizeProcessed = nowPos;
-+ return LZMA_RESULT_OK;
-+}
-diff -rduNp linux-2.6.22.1.oorig/arch/i386/boot/compressed/LzmaDecode.h linux-2.6.22.1/arch/i386/boot/compressed/LzmaDecode.h
---- linux-2.6.22.1.oorig/arch/i386/boot/compressed/LzmaDecode.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/arch/i386/boot/compressed/LzmaDecode.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,131 @@
-+/*
-+ LzmaDecode.h
-+ LZMA Decoder interface
-+
-+ LZMA SDK 4.21 Copyright (c) 1999-2005 Igor Pavlov (2005-06-08)
-+ http://www.7-zip.org/
-+
-+ LZMA SDK is licensed under two licenses:
-+ 1) GNU Lesser General Public License (GNU LGPL)
-+ 2) Common Public License (CPL)
-+ It means that you can select one of these two licenses and
-+ follow rules of that license.
-+
-+ SPECIAL EXCEPTION:
-+ Igor Pavlov, as the author of this code, expressly permits you to
-+ statically or dynamically link your code (or bind by name) to the
-+ interfaces of this file without subjecting your linked code to the
-+ terms of the CPL or GNU LGPL. Any modifications or additions
-+ to this file, however, are subject to the LGPL or CPL terms.
-+*/
-+
-+#ifndef __LZMADECODE_H
-+#define __LZMADECODE_H
-+
-+/* #define _LZMA_IN_CB */
-+/* Use callback for input data */
-+
-+/* #define _LZMA_OUT_READ */
-+/* Use read function for output data */
-+
-+/* #define _LZMA_PROB32 */
-+/* It can increase speed on some 32-bit CPUs,
-+ but memory usage will be doubled in that case */
-+
-+/* #define _LZMA_LOC_OPT */
-+/* Enable local speed optimizations inside code */
-+
-+/* #define _LZMA_SYSTEM_SIZE_T */
-+/* Use system's size_t. You can use it to enable 64-bit sizes supporting*/
-+
-+#ifndef UInt32
-+#ifdef _LZMA_UINT32_IS_ULONG
-+#define UInt32 unsigned long
-+#else
-+#define UInt32 unsigned int
-+#endif
-+#endif
-+
-+#ifndef SizeT
-+#ifdef _LZMA_SYSTEM_SIZE_T
-+#include <stddef.h>
-+#define SizeT size_t
-+#else
-+#define SizeT UInt32
-+#endif
-+#endif
-+
-+#ifdef _LZMA_PROB32
-+#define CProb UInt32
-+#else
-+#define CProb unsigned short
-+#endif
-+
-+#define LZMA_RESULT_OK 0
-+#define LZMA_RESULT_DATA_ERROR 1
-+
-+#ifdef _LZMA_IN_CB
-+typedef struct _ILzmaInCallback
-+{
-+ int (*Read)(void *object, const unsigned char **buffer, SizeT *bufferSize);
-+} ILzmaInCallback;
-+#endif
-+
-+#define LZMA_BASE_SIZE 1846
-+#define LZMA_LIT_SIZE 768
-+
-+#define LZMA_PROPERTIES_SIZE 5
-+
-+typedef struct _CLzmaProperties
-+{
-+ int lc;
-+ int lp;
-+ int pb;
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 DictionarySize;
-+ #endif
-+}CLzmaProperties;
-+
-+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size);
-+
-+#define LzmaGetNumProbs(Properties) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((Properties)->lc + (Properties)->lp)))
-+
-+#define kLzmaNeedInitId (-2)
-+
-+typedef struct _CLzmaDecoderState
-+{
-+ CLzmaProperties Properties;
-+ CProb *Probs;
-+
-+ #ifdef _LZMA_IN_CB
-+ const unsigned char *Buffer;
-+ const unsigned char *BufferLim;
-+ #endif
-+
-+ #ifdef _LZMA_OUT_READ
-+ unsigned char *Dictionary;
-+ UInt32 Range;
-+ UInt32 Code;
-+ UInt32 DictionaryPos;
-+ UInt32 GlobalPos;
-+ UInt32 DistanceLimit;
-+ UInt32 Reps[4];
-+ int State;
-+ int RemainLen;
-+ unsigned char TempDictionary[4];
-+ #endif
-+} CLzmaDecoderState;
-+
-+#ifdef _LZMA_OUT_READ
-+#define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; }
-+#endif
-+
-+int LzmaDecode(CLzmaDecoderState *vs,
-+ #ifdef _LZMA_IN_CB
-+ ILzmaInCallback *inCallback,
-+ #else
-+ const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
-+ #endif
-+ unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed);
-+
-+#endif
-diff -rduNp linux-2.6.22.1.oorig/arch/i386/boot/compressed/Makefile linux-2.6.22.1/arch/i386/boot/compressed/Makefile
---- linux-2.6.22.1.oorig/arch/i386/boot/compressed/Makefile 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/arch/i386/boot/compressed/Makefile 2007-07-24 14:17:46.000000000 +0200
-@@ -4,15 +4,16 @@
- # create a compressed vmlinux image from the original vmlinux
- #
-
--targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o \
-- vmlinux.bin.all vmlinux.relocs
-+tragets := head.o lzma_misc.o piggy.o \
-+ vmlinux.bin.all vmlinux.relocs \
-+ vmlinux vmlinux.bin vmlinux.bin.gz
- EXTRA_AFLAGS := -traditional
-
- LDFLAGS_vmlinux := -T
--CFLAGS_misc.o += -fPIC
-+CFLAGS_lzma_misc.o += -fPIC
- hostprogs-y := relocs
-
--$(obj)/vmlinux: $(src)/vmlinux.lds $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
-+$(obj)/vmlinux: $(src)/vmlinux.lds $(obj)/head.o $(obj)/lzma_misc.o $(obj)/piggy.o FORCE
- $(call if_changed,ld)
- @:
-
-@@ -33,10 +34,10 @@ $(obj)/vmlinux.bin.all: $(vmlinux.bin.al
-
- ifdef CONFIG_RELOCATABLE
- $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
-- $(call if_changed,gzip)
-+ $(call if_changed,lzma)
- else
- $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
-- $(call if_changed,gzip)
-+ $(call if_changed,lzma)
- endif
-
- LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
-diff -rduNp linux-2.6.22.1.oorig/arch/i386/boot/compressed/lzma_misc.c linux-2.6.22.1/arch/i386/boot/compressed/lzma_misc.c
---- linux-2.6.22.1.oorig/arch/i386/boot/compressed/lzma_misc.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/arch/i386/boot/compressed/lzma_misc.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,290 @@
-+/*
-+ * lzma_misc.c
-+ *
-+ * Decompress LZMA compressed vmlinuz
-+ * Version 0.9 Copyright (c) Ming-Ching Tiew mctiew@yahoo.com
-+ * Program adapted from misc.c for 2.6.20.1 kernel
-+ * Please refer to misc.c for authorship and copyright.
-+ * Date: 25 March 2007
-+ * Source released under GPL
-+ */
-+
-+#undef CONFIG_PARAVIRT
-+#include <linux/linkage.h>
-+#include <linux/vmalloc.h>
-+#include <linux/screen_info.h>
-+#include <asm/io.h>
-+#include <asm/page.h>
-+#include <asm/boot.h>
-+
-+/* WARNING!!
-+ * This code is compiled with -fPIC and it is relocated dynamically
-+ * at run time, but no relocation processing is performed.
-+ * This means that it is not safe to place pointers in static structures.
-+ */
-+
-+#define OF(args) args
-+#define STATIC static
-+
-+#undef memset
-+#undef memcpy
-+
-+typedef unsigned char uch;
-+typedef unsigned short ush;
-+typedef unsigned long ulg;
-+
-+#define WSIZE 0x80000000 /* Window size must be at least 32k,
-+ * and a power of two
-+ * We don't actually have a window just
-+ * a huge output buffer so I report
-+ * a 2G windows size, as that should
-+ * always be larger than our output buffer.
-+ */
-+
-+static uch *inbuf; /* input buffer */
-+static uch *window; /* Sliding window buffer, (and final output buffer) */
-+
-+static unsigned insize; /* valid bytes in inbuf */
-+static unsigned inptr; /* index of next byte to be processed in inbuf */
-+
-+/* gzip flag byte */
-+#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
-+#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
-+#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
-+#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
-+#define COMMENT 0x10 /* bit 4 set: file comment present */
-+#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
-+#define RESERVED 0xC0 /* bit 6,7: reserved */
-+
-+#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
-+
-+/* Diagnostic functions */
-+#ifdef DEBUG
-+# define Assert(cond,msg) {if(!(cond)) error(msg);}
-+# define Trace(x) fprintf x
-+# define Tracev(x) {if (verbose) fprintf x ;}
-+# define Tracevv(x) {if (verbose>1) fprintf x ;}
-+# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
-+# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
-+#else
-+# define Assert(cond,msg)
-+# define Trace(x)
-+# define Tracev(x)
-+# define Tracevv(x)
-+# define Tracec(c,x)
-+# define Tracecv(c,x)
-+#endif
-+
-+static int fill_inbuf(void);
-+static void error(char *m);
-+
-+/*
-+ * This is set up by the setup-routine at boot-time
-+ */
-+static unsigned char *real_mode; /* Pointer to real-mode data */
-+
-+#define RM_EXT_MEM_K (*(unsigned short *)(real_mode + 0x2))
-+#ifndef STANDARD_MEMORY_BIOS_CALL
-+#define RM_ALT_MEM_K (*(unsigned long *)(real_mode + 0x1e0))
-+#endif
-+#define RM_SCREEN_INFO (*(struct screen_info *)(real_mode+0))
-+
-+extern unsigned char input_data[];
-+extern int input_len;
-+
-+static long bytes_out = 0;
-+
-+static void *memcpy(void *dest, const void *src, unsigned n);
-+
-+static void putstr(const char *);
-+
-+static unsigned long free_mem_ptr;
-+static unsigned long free_mem_end_ptr;
-+
-+#define HEAP_SIZE 0x3000
-+
-+static char *vidmem = (char *)0xb8000;
-+static int vidport;
-+static int lines, cols;
-+
-+#ifdef CONFIG_X86_NUMAQ
-+void *xquad_portio;
-+#endif
-+
-+static void scroll(void)
-+{
-+ int i;
-+
-+ memcpy ( vidmem, vidmem + cols * 2, ( lines - 1 ) * cols * 2 );
-+ for ( i = ( lines - 1 ) * cols * 2; i < lines * cols * 2; i += 2 )
-+ vidmem[i] = ' ';
-+}
-+
-+static void putstr(const char *s)
-+{
-+ int x,y,pos;
-+ char c;
-+
-+ x = RM_SCREEN_INFO.orig_x;
-+ y = RM_SCREEN_INFO.orig_y;
-+
-+ while ( ( c = *s++ ) != '\0' ) {
-+ if ( c == '\n' ) {
-+ x = 0;
-+ if ( ++y >= lines ) {
-+ scroll();
-+ y--;
-+ }
-+ } else {
-+ vidmem [ ( x + cols * y ) * 2 ] = c;
-+ if ( ++x >= cols ) {
-+ x = 0;
-+ if ( ++y >= lines ) {
-+ scroll();
-+ y--;
-+ }
-+ }
-+ }
-+ }
-+
-+ RM_SCREEN_INFO.orig_x = x;
-+ RM_SCREEN_INFO.orig_y = y;
-+
-+ pos = (x + cols * y) * 2; /* Update cursor position */
-+ outb_p(14, vidport);
-+ outb_p(0xff & (pos >> 9), vidport+1);
-+ outb_p(15, vidport);
-+ outb_p(0xff & (pos >> 1), vidport+1);
-+}
-+
-+static void* memcpy(void* dest, const void* src, unsigned n)
-+{
-+ int i;
-+ char *d = (char *)dest, *s = (char *)src;
-+
-+ for (i=0;i<n;i++) d[i] = s[i];
-+ return dest;
-+}
-+
-+/* ===========================================================================
-+ * Fill the input buffer. This is called only when the buffer is empty
-+ * and at least one byte is really needed.
-+ */
-+static int fill_inbuf(void)
-+{
-+ error("ran out of input data");
-+ return 0;
-+}
-+
-+/* ===========================================================================
-+ */
-+static void error(char *x)
-+{
-+ putstr("\n\n");
-+ putstr(x);
-+ putstr("\n\n -- System halted");
-+
-+ while(1); /* Halt */
-+}
-+
-+#define _LZMA_IN_CB
-+#include "LzmaDecode.h"
-+#include "LzmaDecode.c"
-+
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize);
-+
-+/*
-+ * Do the lzma decompression
-+ */
-+static int lzma_unzip(uch* output)
-+{
-+
-+ unsigned int i;
-+ CLzmaDecoderState state;
-+ unsigned int uncompressedSize = 0;
-+ unsigned char* p;
-+
-+ ILzmaInCallback callback;
-+ callback.Read = read_byte;
-+
-+ // lzma args
-+ i = get_byte();
-+ state.Properties.lc = i % 9, i = i / 9;
-+ state.Properties.lp = i % 5, state.Properties.pb = i / 5;
-+
-+ // skip dictionary size
-+ for (i = 0; i < 4; i++)
-+ get_byte();
-+ // get uncompressed size
-+ p= (char*)&uncompressedSize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ // skip high order bytes
-+ for (i = 0; i < 4; i++)
-+ get_byte();
-+
-+ // Just point it beyond
-+ state.Probs = (CProb*) ( free_mem_ptr );
-+ // decompress kernel
-+ if (LzmaDecode( &state, &callback,
-+ (unsigned char*)output, uncompressedSize, &i) == LZMA_RESULT_OK)
-+ {
-+ if ( i != uncompressedSize )
-+ error( "kernel corrupted!\n");
-+ bytes_out = i;
-+ return 0;
-+ }
-+ return 1;
-+}
-+
-+
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize)
-+{
-+ static unsigned int i = 0;
-+ static unsigned char val;
-+ *bufferSize = 1;
-+ val = get_byte();
-+ *buffer = &val;
-+ return LZMA_RESULT_OK;
-+}
-+
-+asmlinkage void decompress_kernel(void *rmode, unsigned long end,
-+ uch *input_data, unsigned long input_len, uch *output)
-+{
-+ real_mode = rmode;
-+
-+ if (RM_SCREEN_INFO.orig_video_mode == 7) {
-+ vidmem = (char *) 0xb0000;
-+ vidport = 0x3b4;
-+ } else {
-+ vidmem = (char *) 0xb8000;
-+ vidport = 0x3d4;
-+ }
-+
-+ lines = RM_SCREEN_INFO.orig_video_lines;
-+ cols = RM_SCREEN_INFO.orig_video_cols;
-+
-+ window = output; /* Output buffer (Normally at 1M) */
-+ free_mem_ptr = end; /* Heap */
-+ free_mem_end_ptr = end + HEAP_SIZE;
-+ inbuf = input_data; /* Input buffer */
-+ insize = input_len;
-+ inptr = 0;
-+
-+ if ((u32)output & (CONFIG_PHYSICAL_ALIGN -1))
-+ error("Destination address not CONFIG_PHYSICAL_ALIGN aligned");
-+ if (end > ((-__PAGE_OFFSET-(512 <<20)-1) & 0x7fffffff))
-+ error("Destination address too large");
-+#ifndef CONFIG_RELOCATABLE
-+ if ((u32)output != LOAD_PHYSICAL_ADDR)
-+ error("Wrong destination address");
-+#endif
-+ if( lzma_unzip(output) != 0 )
-+ {
-+ error("inflate error\n");
-+ }
-+ putstr("Ok, booting the kernel.\n");
-+
-+ return;
-+}
-diff -rduNp linux-2.6.22.1.oorig/arch/i386/boot/compressed/vmlinux.scr linux-2.6.22.1/arch/i386/boot/compressed/vmlinux.scr
---- linux-2.6.22.1.oorig/arch/i386/boot/compressed/vmlinux.scr 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/arch/i386/boot/compressed/vmlinux.scr 2007-07-24 14:17:46.000000000 +0200
-@@ -3,8 +3,8 @@ SECTIONS
- .data.compressed : {
- input_len = .;
- LONG(input_data_end - input_data) input_data = .;
-+ output_len = . + 5;
- *(.data)
-- output_len = . - 4;
- input_data_end = .;
- }
- }
-diff -rduNp linux-2.6.22.1.oorig/drivers/block/Kconfig linux-2.6.22.1/drivers/block/Kconfig
---- linux-2.6.22.1.oorig/drivers/block/Kconfig 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/drivers/block/Kconfig 2007-07-24 14:17:46.000000000 +0200
-@@ -406,6 +406,47 @@ config BLK_DEV_RAM_BLOCKSIZE
- setups function - apparently needed by the rd_load_image routine
- that supposes the filesystem in the image uses a 1024 blocksize.
-
-+config LZMA_INITRD
-+ boolean "Allow LZMA compression on initrd"
-+ depends on BLK_DEV_INITRD=y
-+ default "y"
-+ help
-+ Use lzma compression on initrd, example 'lzma e initrd initrd.7z -d16'.
-+ If you have sufficient memory, you could compress using bigger dictionary size,
-+ 'lzma e initrd initrd.7z'.
-+
-+config LZMA_INITRD_KMALLOC_ONLY
-+ boolean "Use only kmalloc, do not use vmalloc on lzma initrd"
-+ depends on LZMA_INITRD=y
-+ default "n"
-+ help
-+ Set to y if you do not want to use vmalloc, ie use only kmalloc.
-+
-+config LZMA_INITRAM_FS
-+ boolean "Allow LZMA compression on initramfs"
-+ depends on BLK_DEV_RAM=y
-+ default "y"
-+ help
-+ Use lzma compression on initramfs, example 'lzma e initramfs.cpio initramfs.cpio.lzma'.
-+
-+config LZMA_INITRAM_FS_SMALLMEM
-+ boolean "Use lzma compression with small dictonary size."
-+ depends on LZMA_INITRAM_FS=y
-+ default "y"
-+ help
-+ Use lzma compression on initramfs with small dictionary size, example
-+ 'lzma e initramfs.cpio initramfs.cpio.lzma -d16'.
-+ Affects only the initramfs.cpio in the ~usr directory, which is compiled into
-+ the kernel. If you prepared initramfs.cpio for use with bootloader, you would
-+ need to specify the commandline options (-d16) yourself.
-+
-+config LZMA_INITRAM_FS_KMALLOC_ONLY
-+ boolean "Use only kmalloc, do not use vmalloc on lzma initramfs"
-+ depends on LZMA_INITRAM_FS=y
-+ default "n"
-+ help
-+ Set to y if you do not want to use vmalloc, ie use only kmalloc.
-+
- config CDROM_PKTCDVD
- tristate "Packet writing on CD/DVD media"
- depends on !UML
-diff -rduNp linux-2.6.22.1.oorig/fs/Kconfig linux-2.6.22.1/fs/Kconfig
---- linux-2.6.22.1.oorig/fs/Kconfig 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/fs/Kconfig 2007-07-24 14:17:46.000000000 +0200
-@@ -1367,6 +1367,71 @@ config CRAMFS
-
- If unsure, say N.
-
-+config SQUASHFS
-+ tristate "SquashFS 3.2 - Squashed file system support"
-+ select ZLIB_INFLATE
-+ help
-+ Saying Y here includes support for SquashFS 3.2 (a Compressed Read-Only File
-+ System). Squashfs is a highly compressed read-only filesystem for Linux.
-+ It uses zlib compression to compress both files, inodes and directories.
-+ Inodes in the system are very small and all blocks are packed to minimise
-+ data overhead. Block sizes greater than 4K are supported up to a maximum of 64K.
-+ SquashFS 3.1 supports 64 bit filesystems and files (larger than 4GB), full
-+ uid/gid information, hard links and timestamps.
-+
-+ Squashfs is intended for general read-only filesystem use, for archival
-+ use (i.e. in cases where a .tar.gz file may be used), and in embedded
-+ systems where low overhead is needed. Further information and filesystem tools
-+ are available from http://squashfs.sourceforge.net.
-+
-+ If you want to compile this as a module ( = code which can be
-+ inserted in and removed from the running kernel whenever you want),
-+ say M here and read <file:Documentation/modules.txt>. The module
-+ will be called squashfs. Note that the root file system (the one
-+ containing the directory /) cannot be compiled as a module.
-+
-+ If unsure, say N.
-+
-+config SQUASHFS_EMBEDDED
-+
-+ bool "Additional options for memory-constrained systems"
-+ depends on SQUASHFS
-+ default n
-+ help
-+ Saying Y here allows you to specify cache sizes and how Squashfs
-+ allocates memory. This is only intended for memory constrained
-+ systems.
-+
-+ If unsure, say N.
-+
-+config SQUASHFS_FRAGMENT_CACHE_SIZE
-+ int "Number of fragments cached" if SQUASHFS_EMBEDDED
-+ depends on SQUASHFS
-+ default "3"
-+ help
-+ By default SquashFS caches the last 3 fragments read from
-+ the filesystem. Increasing this amount may mean SquashFS
-+ has to re-read fragments less often from disk, at the expense
-+ of extra system memory. Decreasing this amount will mean
-+ SquashFS uses less memory at the expense of extra reads from disk.
-+
-+ Note there must be at least one cached fragment. Anything
-+ much more than three will probably not make much difference.
-+
-+config SQUASHFS_VMALLOC
-+ bool "Use Vmalloc rather than Kmalloc" if SQUASHFS_EMBEDDED
-+ depends on SQUASHFS
-+ default n
-+ help
-+ By default SquashFS uses kmalloc to obtain fragment cache memory.
-+ Kmalloc memory is the standard kernel allocator, but it can fail
-+ on memory constrained systems. Because of the way Vmalloc works,
-+ Vmalloc can succeed when kmalloc fails. Specifying this option
-+ will make SquashFS always use Vmalloc to allocate the
-+ fragment cache memory.
-+
-+ If unsure, say N.
-+
- config VXFS_FS
- tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
- depends on BLOCK
-@@ -2072,3 +2137,4 @@ source "fs/dlm/Kconfig"
-
- endmenu
-
-+source "fs/aufs/Kconfig"
-diff -rduNp linux-2.6.22.1.oorig/fs/Makefile linux-2.6.22.1/fs/Makefile
---- linux-2.6.22.1.oorig/fs/Makefile 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/fs/Makefile 2007-07-24 14:17:46.000000000 +0200
-@@ -72,6 +72,7 @@ obj-$(CONFIG_JBD) += jbd/
- obj-$(CONFIG_JBD2) += jbd2/
- obj-$(CONFIG_EXT2_FS) += ext2/
- obj-$(CONFIG_CRAMFS) += cramfs/
-+obj-$(CONFIG_SQUASHFS) += squashfs/
- obj-$(CONFIG_RAMFS) += ramfs/
- obj-$(CONFIG_HUGETLBFS) += hugetlbfs/
- obj-$(CONFIG_CODA_FS) += coda/
-@@ -118,3 +119,4 @@ obj-$(CONFIG_HPPFS) += hppfs/
- obj-$(CONFIG_DEBUG_FS) += debugfs/
- obj-$(CONFIG_OCFS2_FS) += ocfs2/
- obj-$(CONFIG_GFS2_FS) += gfs2/
-+obj-$(CONFIG_AUFS) += aufs/
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/Kconfig linux-2.6.22.1/fs/aufs/Kconfig
---- linux-2.6.22.1.oorig/fs/aufs/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/Kconfig 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,73 @@
-+config AUFS
-+ tristate "Another unionfs"
-+ help
-+ Aufs is a stackable unification filesystem such as Unionfs,
-+ which unifies several directories and provides a merged single
-+ directory.
-+ In the early days, aufs was entirely re-designed and
-+ re-implemented Unionfs Version 1.x series. After many original
-+ ideas, approaches and improvements, it becomes totally
-+ different from Unionfs while keeping the basic features.
-+ See Unionfs for the basic features.
-+
-+if AUFS
-+comment "These options are generated automatically for "#UTS_RELEASE
-+
-+config AUFS_FAKE_DM
-+ bool "Use simplified (fake) nameidata"
-+ depends on AUFS
-+ default y
-+ help
-+ Faking nameidata (VFS internal data), you can get better performance
-+ in some cases.
-+
-+choice
-+ prompt "Maximum number of branches"
-+ depends on AUFS
-+ default AUFS_BRANCH_MAX_127
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+config AUFS_BRANCH_MAX_127
-+ bool "127"
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+config AUFS_BRANCH_MAX_511
-+ bool "511"
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+config AUFS_BRANCH_MAX_1023
-+ bool "1023"
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+
-+config AUFS_BRANCH_MAX_32767
-+ bool "32767"
-+ help
-+ Specifies the maximum number of branches (or member directories) in a single aufs. The larger value consumes more system resources and has an impact to performance.
-+endchoice
-+config AUFS_DEBUG
-+ bool "Debug aufs"
-+ depends on AUFS
-+ default y
-+ help
-+ Enable this to compile aufs internal debug code.
-+ The performance will be damaged.
-+
-+config AUFS_COMPAT
-+ bool "Compatibility with Unionfs (obsolete)"
-+ depends on AUFS
-+ default n
-+ help
-+ This makes aufs compatible with unionfs-style mount options and some
-+ behaviours.
-+ The dirs= mount option and =nfsro branch permission flag are always
-+ interpreted as br: mount option and =ro flag respectively. The
-+ 'debug', 'delete' and 'imap' mount options are ignored.
-+ If you disable this option, you will get,
-+ - aufs issues a warning about the ignored mount options
-+ - the default branch permission flag is set. RW for the first branch,
-+ and RO for the rests.
-+ - the name of a internal file which represents the directory is
-+ 'opaque', becomes '.wh..wh..opq'
-+ - the 'diropq=w' mount option is set by default
-+endif
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/Makefile linux-2.6.22.1/fs/aufs/Makefile
---- linux-2.6.22.1.oorig/fs/aufs/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/Makefile 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,18 @@
-+# AUFS Makefile for the Linux 2.6.16 and later
-+# $Id: Makefile,v 1.29 2007/04/23 00:59:50 sfjro Exp $
-+
-+obj-$(CONFIG_AUFS) += aufs.o
-+aufs-y := module.o super.o sbinfo.o xino.o \
-+ branch.o cpup.o whout.o plink.o wkq.o dcsub.o vfsub.o \
-+ opts.o \
-+ dentry.o dinfo.o \
-+ file.o f_op.o finfo.o \
-+ dir.o vdir.o \
-+ inode.o i_op.o i_op_add.o i_op_del.o i_op_ren.o iinfo.o \
-+ misc.o
-+#xattr.o
-+aufs-$(CONFIG_AUFS_SYSAUFS) += sysaufs.o
-+aufs-$(CONFIG_AUFS_HINOTIFY) += hinotify.o
-+aufs-$(CONFIG_AUFS_EXPORT) += export.o
-+#aufs-$(CONFIG_DEBUGFS) += dbgfs.o
-+aufs-$(CONFIG_AUFS_DEBUG) += debug.o
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/aufs.h linux-2.6.22.1/fs/aufs/aufs.h
---- linux-2.6.22.1.oorig/fs/aufs/aufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/aufs.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,64 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: aufs.h,v 1.24 2007/05/14 03:41:51 sfjro Exp $ */
-+
-+#ifndef __AUFS_H__
-+#define __AUFS_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/version.h>
-+
-+/* limited support before 2.6.16, curretly 2.6.15 only. */
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
-+#define atomic_long_t atomic_t
-+#define atomic_long_set atomic_set
-+#define timespec_to_ns(ts) ({(long long)(ts)->tv_sec;})
-+#define D_CHILD d_child
-+#else
-+#define D_CHILD d_u.d_child
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#include "debug.h"
-+
-+#include "branch.h"
-+#include "cpup.h"
-+#include "dcsub.h"
-+#include "dentry.h"
-+#include "dir.h"
-+#include "file.h"
-+#include "inode.h"
-+#include "misc.h"
-+#include "module.h"
-+#include "opts.h"
-+#include "super.h"
-+#include "sysaufs.h"
-+#include "vfsub.h"
-+#include "whout.h"
-+#include "wkq.h"
-+//#include "xattr.h"
-+
-+#if defined(CONFIG_AUFS_MODULE) && !defined(CONFIG_AUFS_KSIZE_PATCH)
-+#define ksize(p) (-1U)
-+#endif
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/branch.c linux-2.6.22.1/fs/aufs/branch.c
---- linux-2.6.22.1.oorig/fs/aufs/branch.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/branch.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,818 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: branch.c,v 1.49 2007/05/14 03:38:23 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include "aufs.h"
-+
-+static void free_branch(struct aufs_branch *br)
-+{
-+ TraceEnter();
-+
-+ if (br->br_xino)
-+ fput(br->br_xino);
-+ dput(br->br_wh);
-+ dput(br->br_plink);
-+ mntput(br->br_mnt);
-+ DEBUG_ON(br_count(br) || atomic_read(&br->br_wh_running));
-+ kfree(br);
-+}
-+
-+/*
-+ * frees all branches
-+ */
-+void free_branches(struct aufs_sbinfo *sbinfo)
-+{
-+ aufs_bindex_t bmax;
-+ struct aufs_branch **br;
-+
-+ TraceEnter();
-+ bmax = sbinfo->si_bend + 1;
-+ br = sbinfo->si_branch;
-+ while (bmax--)
-+ free_branch(*br++);
-+}
-+
-+/*
-+ * find the index of a branch which is specified by @br_id.
-+ */
-+int find_brindex(struct super_block *sb, aufs_bindex_t br_id)
-+{
-+ aufs_bindex_t bindex, bend;
-+
-+ TraceEnter();
-+
-+ bend = sbend(sb);
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (sbr_id(sb, bindex) == br_id)
-+ return bindex;
-+ return -1;
-+}
-+
-+/*
-+ * test if the @br is readonly or not.
-+ */
-+int br_rdonly(struct aufs_branch *br)
-+{
-+ return ((br->br_mnt->mnt_sb->s_flags & MS_RDONLY)
-+ || !br_writable(br->br_perm))
-+ ? -EROFS : 0;
-+}
-+
-+/*
-+ * returns writable branch index, otherwise an error.
-+ * todo: customizable writable-branch-policy
-+ */
-+static int find_rw_parent(struct dentry *dentry, aufs_bindex_t bend)
-+{
-+ int err;
-+ aufs_bindex_t bindex, candidate;
-+ struct super_block *sb;
-+ struct dentry *parent, *hidden_parent;
-+
-+ err = bend;
-+ sb = dentry->d_sb;
-+ parent = dget_parent(dentry);
-+#if 1 // branch policy
-+ hidden_parent = au_h_dptr_i(parent, bend);
-+ if (hidden_parent && !br_rdonly(stobr(sb, bend)))
-+ goto out; /* success */
-+#endif
-+
-+ candidate = -1;
-+ for (bindex = dbstart(parent); bindex <= bend; bindex++) {
-+ hidden_parent = au_h_dptr_i(parent, bindex);
-+ if (hidden_parent && !br_rdonly(stobr(sb, bindex))) {
-+#if 0 // branch policy
-+ if (candidate == -1)
-+ candidate = bindex;
-+ if (!au_test_perm(hidden_parent->d_inode, MAY_WRITE))
-+ return bindex;
-+#endif
-+ err = bindex;
-+ goto out; /* success */
-+ }
-+ }
-+#if 0 // branch policy
-+ err = candidate;
-+ if (candidate != -1)
-+ goto out; /* success */
-+#endif
-+ err = -EROFS;
-+
-+ out:
-+ dput(parent);
-+ return err;
-+}
-+
-+int find_rw_br(struct super_block *sb, aufs_bindex_t bend)
-+{
-+ aufs_bindex_t bindex;
-+
-+ for (bindex = bend; bindex >= 0; bindex--)
-+ if (!br_rdonly(stobr(sb, bindex)))
-+ return bindex;
-+ return -EROFS;
-+}
-+
-+int find_rw_parent_br(struct dentry *dentry, aufs_bindex_t bend)
-+{
-+ int err;
-+
-+ err = find_rw_parent(dentry, bend);
-+ if (err >= 0)
-+ return err;
-+ return find_rw_br(dentry->d_sb, bend);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * test if two hidden_dentries have overlapping branches.
-+ */
-+//todo: try is_subdir()
-+static int do_is_overlap(struct super_block *sb, struct dentry *hidden_d1,
-+ struct dentry *hidden_d2)
-+{
-+ struct dentry *d;
-+
-+ d = hidden_d1;
-+ do {
-+ if (unlikely(d == hidden_d2))
-+ return 1;
-+ d = d->d_parent; // dget_parent()
-+ } while (!IS_ROOT(d));
-+
-+ return (d == hidden_d2);
-+}
-+
-+#if defined(CONFIG_BLK_DEV_LOOP) || defined(CONFIG_BLK_DEV_LOOP_MODULE)
-+#include <linux/loop.h>
-+static int is_overlap_loopback(struct super_block *sb, struct dentry *hidden_d1,
-+ struct dentry *hidden_d2)
-+{
-+ struct inode *hidden_inode;
-+ struct loop_device *l;
-+
-+ hidden_inode = hidden_d1->d_inode;
-+ if (MAJOR(hidden_inode->i_sb->s_dev) != LOOP_MAJOR)
-+ return 0;
-+
-+ l = hidden_inode->i_sb->s_bdev->bd_disk->private_data;
-+ hidden_d1 = l->lo_backing_file->f_dentry;
-+ if (unlikely(hidden_d1->d_sb == sb))
-+ return 1;
-+ return do_is_overlap(sb, hidden_d1, hidden_d2);
-+}
-+#else
-+#define is_overlap_loopback(sb, hidden_d1, hidden_d2) 0
-+#endif
-+
-+static int is_overlap(struct super_block *sb, struct dentry *hidden_d1,
-+ struct dentry *hidden_d2)
-+{
-+ LKTRTrace("d1 %.*s, d2 %.*s\n", DLNPair(hidden_d1), DLNPair(hidden_d2));
-+ if (unlikely(hidden_d1 == hidden_d2))
-+ return 1;
-+ return do_is_overlap(sb, hidden_d1, hidden_d2)
-+ || do_is_overlap(sb, hidden_d2, hidden_d1)
-+ || is_overlap_loopback(sb, hidden_d1, hidden_d2)
-+ || is_overlap_loopback(sb, hidden_d2, hidden_d1);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int init_br_wh(struct super_block *sb, aufs_bindex_t bindex,
-+ struct aufs_branch *br, int new_perm,
-+ struct dentry *h_root, struct vfsmount *h_mnt)
-+{
-+ int err, old_perm;
-+ struct inode *dir = sb->s_root->d_inode,
-+ *h_dir = h_root->d_inode;
-+ const int new = (bindex < 0);
-+
-+ LKTRTrace("b%d, new_perm %d\n", bindex, new_perm);
-+
-+ if (new)
-+ hi_lock_parent(h_dir);
-+ else
-+ hdir_lock(h_dir, dir, bindex);
-+
-+ br_wh_write_lock(br);
-+ old_perm = br->br_perm;
-+ br->br_perm = new_perm;
-+ err = init_wh(h_root, br, au_do_nfsmnt(h_mnt), sb);
-+ br->br_perm = old_perm;
-+ br_wh_write_unlock(br);
-+
-+ if (new)
-+ i_unlock(h_dir);
-+ else
-+ hdir_unlock(h_dir, dir, bindex);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * returns a newly allocated branch. @new_nbranch is a number of branches
-+ * after adding a branch.
-+ */
-+static struct aufs_branch *alloc_addbr(struct super_block *sb, int new_nbranch)
-+{
-+ struct aufs_branch **branchp, *add_branch;
-+ int sz;
-+ void *p;
-+ struct dentry *root;
-+ struct inode *inode;
-+ struct aufs_hinode *hinodep;
-+ struct aufs_hdentry *hdentryp;
-+
-+ LKTRTrace("new_nbranch %d\n", new_nbranch);
-+ SiMustWriteLock(sb);
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ inode = root->d_inode;
-+ IiMustWriteLock(inode);
-+
-+ add_branch = kmalloc(sizeof(*add_branch), GFP_KERNEL);
-+ //if (LktrCond) {kfree(add_branch); add_branch = NULL;}
-+ if (unlikely(!add_branch))
-+ goto out;
-+
-+ sz = sizeof(*branchp) * (new_nbranch - 1);
-+ if (unlikely(!sz))
-+ sz = sizeof(*branchp);
-+ p = stosi(sb)->si_branch;
-+ branchp = au_kzrealloc(p, sz, sizeof(*branchp) * new_nbranch,
-+ GFP_KERNEL);
-+ //if (LktrCond) branchp = NULL;
-+ if (unlikely(!branchp))
-+ goto out;
-+ stosi(sb)->si_branch = branchp;
-+
-+ sz = sizeof(*hdentryp) * (new_nbranch - 1);
-+ if (unlikely(!sz))
-+ sz = sizeof(*hdentryp);
-+ p = dtodi(root)->di_hdentry;
-+ hdentryp = au_kzrealloc(p, sz, sizeof(*hdentryp) * new_nbranch,
-+ GFP_KERNEL);
-+ //if (LktrCond) hdentryp = NULL;
-+ if (unlikely(!hdentryp))
-+ goto out;
-+ dtodi(root)->di_hdentry = hdentryp;
-+
-+ sz = sizeof(*hinodep) * (new_nbranch - 1);
-+ if (unlikely(!sz))
-+ sz = sizeof(*hinodep);
-+ p = itoii(inode)->ii_hinode;
-+ hinodep = au_kzrealloc(p, sz, sizeof(*hinodep) * new_nbranch,
-+ GFP_KERNEL);
-+ //if (LktrCond) hinodep = NULL; // unavailable test
-+ if (unlikely(!hinodep))
-+ goto out;
-+ itoii(inode)->ii_hinode = hinodep;
-+ return add_branch; /* success */
-+
-+ out:
-+ kfree(add_branch);
-+ TraceErr(-ENOMEM);
-+ return ERR_PTR(-ENOMEM);
-+}
-+
-+/*
-+ * test if the branch permission is legal or not.
-+ */
-+static int test_br(struct super_block *sb, struct inode *inode, int brperm,
-+ char *path)
-+{
-+ int err;
-+
-+ err = 0;
-+ if (unlikely(br_writable(brperm) && IS_RDONLY(inode))) {
-+ Err("write permission for readonly fs or inode, %s\n", path);
-+ err = -EINVAL;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * retunrs,,,
-+ * 0: success, the caller will add it
-+ * plus: success, it is already unified, the caller should ignore it
-+ * minus: error
-+ */
-+static int test_add(struct super_block *sb, struct opt_add *add, int remount)
-+{
-+ int err;
-+ struct dentry *root;
-+ struct inode *inode, *hidden_inode;
-+ aufs_bindex_t bend, bindex;
-+
-+ LKTRTrace("%s, remo%d\n", add->path, remount);
-+
-+ root = sb->s_root;
-+ if (unlikely(au_find_dbindex(root, add->nd.dentry) != -1)) {
-+ err = 1;
-+ if (!remount) {
-+ err = -EINVAL;
-+ Err("%s duplicated\n", add->path);
-+ }
-+ goto out;
-+ }
-+
-+ err = -ENOSPC; //-E2BIG;
-+ bend = sbend(sb);
-+ //if (LktrCond) bend = AUFS_BRANCH_MAX;
-+ if (unlikely(AUFS_BRANCH_MAX <= add->bindex
-+ || AUFS_BRANCH_MAX - 1 <= bend)) {
-+ Err("number of branches exceeded %s\n", add->path);
-+ goto out;
-+ }
-+
-+ err = -EDOM;
-+ if (unlikely(add->bindex < 0 || bend + 1 < add->bindex)) {
-+ Err("bad index %d\n", add->bindex);
-+ goto out;
-+ }
-+
-+ inode = add->nd.dentry->d_inode;
-+ DEBUG_ON(!inode || !S_ISDIR(inode->i_mode));
-+ err = -ENOENT;
-+ if (unlikely(!inode->i_nlink)) {
-+ Err("no existence %s\n", add->path);
-+ goto out;
-+ }
-+
-+ err = -EINVAL;
-+ if (unlikely(inode->i_sb == sb)) {
-+ Err("%s must be outside\n", add->path);
-+ goto out;
-+ }
-+
-+#if 1 //ndef CONFIG_AUFS_ROBR
-+ if (unlikely(au_is_aufs(inode->i_sb)
-+ || !strcmp(au_sbtype(inode->i_sb), "unionfs"))) {
-+ Err("nested " AUFS_NAME " %s\n", add->path);
-+ goto out;
-+ }
-+#endif
-+
-+#ifdef AuNoNfsBranch
-+ if (unlikely(au_is_nfs(inode->i_sb))) {
-+ Err(AuNoNfsBranchMsg ". %s\n", add->path);
-+ goto out;
-+ }
-+#endif
-+
-+ err = test_br(sb, add->nd.dentry->d_inode, add->perm, add->path);
-+ if (unlikely(err))
-+ goto out;
-+
-+ if (unlikely(bend == -1))
-+ return 0; /* success */
-+
-+ hidden_inode = au_h_dptr(root)->d_inode;
-+ if (unlikely(au_flag_test(sb, AuFlag_WARN_PERM)
-+ && ((hidden_inode->i_mode & S_IALLUGO)
-+ != (inode->i_mode & S_IALLUGO)
-+ || hidden_inode->i_uid != inode->i_uid
-+ || hidden_inode->i_gid != inode->i_gid)))
-+ Warn("uid/gid/perm %s %u/%u/0%o, %u/%u/0%o\n",
-+ add->path,
-+ inode->i_uid, inode->i_gid, (inode->i_mode & S_IALLUGO),
-+ hidden_inode->i_uid, hidden_inode->i_gid,
-+ (hidden_inode->i_mode & S_IALLUGO));
-+
-+ err = -EINVAL;
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (unlikely(is_overlap(sb, add->nd.dentry,
-+ au_h_dptr_i(root, bindex)))) {
-+ Err("%s is overlapped\n", add->path);
-+ goto out;
-+ }
-+ err = 0;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int br_add(struct super_block *sb, struct opt_add *add, int remount)
-+{
-+ int err, sz;
-+ aufs_bindex_t bend, add_bindex;
-+ struct dentry *root;
-+ struct aufs_iinfo *iinfo;
-+ struct aufs_sbinfo *sbinfo;
-+ struct aufs_dinfo *dinfo;
-+ struct inode *root_inode;
-+ unsigned long long maxb;
-+ struct aufs_branch **branchp, *add_branch;
-+ struct aufs_hdentry *hdentryp;
-+ struct aufs_hinode *hinodep;
-+
-+ LKTRTrace("b%d, %s, 0x%x, %.*s\n", add->bindex, add->path,
-+ add->perm, DLNPair(add->nd.dentry));
-+ SiMustWriteLock(sb);
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ root_inode = root->d_inode;
-+ IMustLock(root_inode);
-+ IiMustWriteLock(root_inode);
-+
-+ err = test_add(sb, add, remount);
-+ if (unlikely(err < 0))
-+ goto out;
-+ if (unlikely(err))
-+ return 0; /* success */
-+
-+ bend = sbend(sb);
-+ add_branch = alloc_addbr(sb, bend + 2);
-+ err = PTR_ERR(add_branch);
-+ if (IS_ERR(add_branch))
-+ goto out;
-+
-+ err = 0;
-+ rw_init_nolock(&add_branch->br_wh_rwsem);
-+ add_branch->br_wh = add_branch->br_plink = NULL;
-+ if (unlikely(br_writable(add->perm))) {
-+ err = init_br_wh(sb, /*bindex*/-1, add_branch, add->perm,
-+ add->nd.dentry, add->nd.mnt);
-+ if (unlikely(err)) {
-+ kfree(add_branch);
-+ goto out;
-+ }
-+ }
-+ add_branch->br_xino = NULL;
-+ add_branch->br_mnt = mntget(add->nd.mnt);
-+ atomic_set(&add_branch->br_wh_running, 0);
-+ add_branch->br_id = new_br_id(sb);
-+ add_branch->br_perm = add->perm;
-+ atomic_set(&add_branch->br_count, 0);
-+
-+ sbinfo = stosi(sb);
-+ dinfo = dtodi(root);
-+ iinfo = itoii(root_inode);
-+
-+ add_bindex = add->bindex;
-+ sz = sizeof(*(sbinfo->si_branch)) * (bend + 1 - add_bindex);
-+ branchp = sbinfo->si_branch + add_bindex;
-+ memmove(branchp + 1, branchp, sz);
-+ *branchp = add_branch;
-+ sz = sizeof(*hdentryp) * (bend + 1 - add_bindex);
-+ hdentryp = dinfo->di_hdentry + add_bindex;
-+ memmove(hdentryp + 1, hdentryp, sz);
-+ hdentryp->hd_dentry = NULL;
-+ sz = sizeof(*hinodep) * (bend + 1 - add_bindex);
-+ hinodep = iinfo->ii_hinode + add_bindex;
-+ memmove(hinodep + 1, hinodep, sz);
-+ hinodep->hi_inode = NULL;
-+ hinodep->hi_notify = NULL;
-+
-+ sbinfo->si_bend++;
-+ dinfo->di_bend++;
-+ iinfo->ii_bend++;
-+ if (unlikely(bend == -1)) {
-+ dinfo->di_bstart = 0;
-+ iinfo->ii_bstart = 0;
-+ }
-+ set_h_dptr(root, add_bindex, dget(add->nd.dentry));
-+ set_h_iptr(root_inode, add_bindex, igrab(add->nd.dentry->d_inode), 0);
-+ if (!add_bindex)
-+ au_cpup_attr_all(root_inode);
-+ else
-+ au_add_nlink(root_inode, add->nd.dentry->d_inode);
-+ maxb = add->nd.dentry->d_sb->s_maxbytes;
-+ if (sb->s_maxbytes < maxb)
-+ sb->s_maxbytes = maxb;
-+
-+ if (au_flag_test(sb, AuFlag_XINO)) {
-+ struct file *base_file = stobr(sb, 0)->br_xino;
-+ if (!add_bindex)
-+ base_file = stobr(sb, 1)->br_xino;
-+ err = xino_init(sb, add_bindex, base_file, /*do_test*/1);
-+ if (unlikely(err)) {
-+ DEBUG_ON(add_branch->br_xino);
-+ Err("ignored xino err %d, force noxino\n", err);
-+ err = 0;
-+ au_flag_clr(sb, AuFlag_XINO);
-+ }
-+ }
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * test if the branch is deletable or not.
-+ */
-+static int test_children_busy(struct dentry *root, aufs_bindex_t bindex)
-+{
-+ int err, i, j, sigen;
-+ struct au_dcsub_pages dpages;
-+
-+ LKTRTrace("b%d\n", bindex);
-+ SiMustWriteLock(root->d_sb);
-+ DiMustWriteLock(root);
-+
-+ err = au_dpages_init(&dpages, GFP_KERNEL);
-+ if (unlikely(err))
-+ goto out;
-+ err = au_dcsub_pages(&dpages, root, NULL, NULL);
-+ if (unlikely(err))
-+ goto out_dpages;
-+
-+ sigen = au_sigen(root->d_sb);
-+ DiMustNoWaiters(root);
-+ IiMustNoWaiters(root->d_inode);
-+ di_write_unlock(root);
-+ for (i = 0; !err && i < dpages.ndpage; i++) {
-+ struct au_dpage *dpage;
-+ dpage = dpages.dpages + i;
-+ for (j = 0; !err && j < dpage->ndentry; j++) {
-+ struct dentry *d;
-+
-+ d = dpage->dentries[j];
-+ if (au_digen(d) == sigen)
-+ di_read_lock_child(d, AUFS_I_RLOCK);
-+ else {
-+ di_write_lock_child(d);
-+ err = au_reval_dpath(d, sigen);
-+ if (!err)
-+ di_downgrade_lock(d, AUFS_I_RLOCK);
-+ else {
-+ di_write_unlock(d);
-+ break;
-+ }
-+ }
-+
-+ if (au_h_dptr_i(d, bindex)
-+ && (!S_ISDIR(d->d_inode->i_mode)
-+ || dbstart(d) == dbend(d)))
-+ err = -EBUSY;
-+ di_read_unlock(d, AUFS_I_RLOCK);
-+ if (err)
-+ LKTRTrace("%.*s\n", DLNPair(d));
-+ }
-+ }
-+ di_write_lock_child(root); /* aufs_write_lock() calls ..._child() */
-+
-+ out_dpages:
-+ au_dpages_free(&dpages);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int br_del(struct super_block *sb, struct opt_del *del, int remount)
-+{
-+ int err, do_wh, rerr;
-+ struct dentry *root;
-+ struct inode *inode, *hidden_dir;
-+ aufs_bindex_t bindex, bend, br_id;
-+ struct aufs_sbinfo *sbinfo;
-+ struct aufs_dinfo *dinfo;
-+ struct aufs_iinfo *iinfo;
-+ struct aufs_branch *br;
-+
-+ LKTRTrace("%s, %.*s\n", del->path, DLNPair(del->h_root));
-+ SiMustWriteLock(sb);
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ inode = root->d_inode;
-+ IiMustWriteLock(inode);
-+
-+ bindex = au_find_dbindex(root, del->h_root);
-+ if (unlikely(bindex < 0)) {
-+ if (remount)
-+ return 0; /* success */
-+ err = -ENOENT;
-+ Err("%s no such branch\n", del->path);
-+ goto out;
-+ }
-+ LKTRTrace("bindex b%d\n", bindex);
-+
-+ err = -EBUSY;
-+ bend = sbend(sb);
-+ br = stobr(sb, bindex);
-+ if (unlikely(!bend || br_count(br))) {
-+ LKTRTrace("bend %d, br_count %d\n", bend, br_count(br));
-+ goto out;
-+ }
-+
-+ do_wh = 0;
-+ hidden_dir = del->h_root->d_inode;
-+ if (unlikely(br->br_wh || br->br_plink)) {
-+#if 0
-+ /* remove whiteout base */
-+ err = init_br_wh(sb, bindex, br, AuBr_RO, del->h_root,
-+ br->br_mnt);
-+ if (unlikely(err))
-+ goto out;
-+#else
-+ dput(br->br_wh);
-+ dput(br->br_plink);
-+ br->br_wh = br->br_plink = NULL;
-+#endif
-+ do_wh = 1;
-+ }
-+
-+ err = test_children_busy(root, bindex);
-+ if (unlikely(err)) {
-+ if (unlikely(do_wh))
-+ goto out_wh;
-+ goto out;
-+ }
-+
-+ err = 0;
-+ sbinfo = stosi(sb);
-+ dinfo = dtodi(root);
-+ iinfo = itoii(inode);
-+
-+ dput(au_h_dptr_i(root, bindex));
-+ aufs_hiput(iinfo->ii_hinode + bindex);
-+ br_id = br->br_id;
-+ free_branch(br);
-+
-+ //todo: realloc and shrink memeory
-+ if (bindex < bend) {
-+ const aufs_bindex_t n = bend - bindex;
-+ struct aufs_branch **brp;
-+ struct aufs_hdentry *hdp;
-+ struct aufs_hinode *hip;
-+
-+ brp = sbinfo->si_branch + bindex;
-+ memmove(brp, brp + 1, sizeof(*brp) * n);
-+ hdp = dinfo->di_hdentry + bindex;
-+ memmove(hdp, hdp + 1, sizeof(*hdp) * n);
-+ hip = iinfo->ii_hinode + bindex;
-+ memmove(hip, hip + 1, sizeof(*hip) * n);
-+ }
-+ sbinfo->si_branch[0 + bend] = NULL;
-+ dinfo->di_hdentry[0 + bend].hd_dentry = NULL;
-+ iinfo->ii_hinode[0 + bend].hi_inode = NULL;
-+ iinfo->ii_hinode[0 + bend].hi_notify = NULL;
-+
-+ sbinfo->si_bend--;
-+ dinfo->di_bend--;
-+ iinfo->ii_bend--;
-+ if (!bindex)
-+ au_cpup_attr_all(inode);
-+ else
-+ au_sub_nlink(inode, del->h_root->d_inode);
-+ if (au_flag_test(sb, AuFlag_PLINK))
-+ half_refresh_plink(sb, br_id);
-+
-+ if (sb->s_maxbytes == del->h_root->d_sb->s_maxbytes) {
-+ bend--;
-+ sb->s_maxbytes = 0;
-+ for (bindex = 0; bindex <= bend; bindex++) {
-+ unsigned long long maxb;
-+ maxb = sbr_sb(sb, bindex)->s_maxbytes;
-+ if (sb->s_maxbytes < maxb)
-+ sb->s_maxbytes = maxb;
-+ }
-+ }
-+ goto out; /* success */
-+
-+ out_wh:
-+ /* revert */
-+ rerr = init_br_wh(sb, bindex, br, br->br_perm, del->h_root, br->br_mnt);
-+ if (rerr)
-+ Warn("failed re-creating base whiteout, %s. (%d)\n",
-+ del->path, rerr);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int do_need_sigen_inc(int a, int b)
-+{
-+ return (br_whable(a) && !br_whable(b));
-+}
-+
-+static int need_sigen_inc(int old, int new)
-+{
-+ return (do_need_sigen_inc(old, new)
-+ || do_need_sigen_inc(new, old));
-+}
-+
-+int br_mod(struct super_block *sb, struct opt_mod *mod, int remount,
-+ int *do_update)
-+{
-+ int err;
-+ struct dentry *root;
-+ aufs_bindex_t bindex;
-+ struct aufs_branch *br;
-+ struct inode *hidden_dir;
-+
-+ LKTRTrace("%s, %.*s, 0x%x\n",
-+ mod->path, DLNPair(mod->h_root), mod->perm);
-+ SiMustWriteLock(sb);
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ IiMustWriteLock(root->d_inode);
-+
-+ bindex = au_find_dbindex(root, mod->h_root);
-+ if (unlikely(bindex < 0)) {
-+ if (remount)
-+ return 0; /* success */
-+ err = -ENOENT;
-+ Err("%s no such branch\n", mod->path);
-+ goto out;
-+ }
-+ LKTRTrace("bindex b%d\n", bindex);
-+
-+ hidden_dir = mod->h_root->d_inode;
-+ err = test_br(sb, hidden_dir, mod->perm, mod->path);
-+ if (unlikely(err))
-+ goto out;
-+
-+ br = stobr(sb, bindex);
-+ if (unlikely(br->br_perm == mod->perm))
-+ return 0; /* success */
-+
-+ if (br_writable(br->br_perm)) {
-+#if 1
-+ /* remove whiteout base */
-+ //todo: mod->perm?
-+ err = init_br_wh(sb, bindex, br, AuBr_RO, mod->h_root,
-+ br->br_mnt);
-+ if (unlikely(err))
-+ goto out;
-+#else
-+ dput(br->br_wh);
-+ dput(br->br_plink);
-+ br->br_wh = br->br_plink = NULL;
-+#endif
-+
-+ if (!br_writable(mod->perm)) {
-+ /* rw --> ro, file might be mmapped */
-+ struct file *file, *hf;
-+
-+#if 1 // test here
-+ DiMustNoWaiters(root);
-+ IiMustNoWaiters(root->d_inode);
-+ di_write_unlock(root);
-+
-+ // no need file_list_lock() since sbinfo is locked
-+ //file_list_lock();
-+ list_for_each_entry(file, &sb->s_files, f_u.fu_list) {
-+ LKTRTrace("%.*s\n", DLNPair(file->f_dentry));
-+ fi_read_lock(file);
-+ if (!S_ISREG(file->f_dentry->d_inode->i_mode)
-+ || !(file->f_mode & FMODE_WRITE)
-+ || fbstart(file) != bindex) {
-+ FiMustNoWaiters(file);
-+ fi_read_unlock(file);
-+ continue;
-+ }
-+
-+ // todo: already flushed?
-+ hf = au_h_fptr(file);
-+ hf->f_flags = au_file_roflags(hf->f_flags);
-+ hf->f_mode &= ~FMODE_WRITE;
-+ FiMustNoWaiters(file);
-+ fi_read_unlock(file);
-+ }
-+ //file_list_unlock();
-+
-+ /* aufs_write_lock() calls ..._child() */
-+ di_write_lock_child(root);
-+#endif
-+ }
-+ }
-+
-+ *do_update |= need_sigen_inc(br->br_perm, mod->perm);
-+ br->br_perm = mod->perm;
-+ return err; /* success */
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/branch.h linux-2.6.22.1/fs/aufs/branch.h
---- linux-2.6.22.1.oorig/fs/aufs/branch.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/branch.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,235 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: branch.h,v 1.30 2007/05/14 03:41:51 sfjro Exp $ */
-+
-+#ifndef __AUFS_BRANCH_H__
-+#define __AUFS_BRANCH_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/mount.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+#include "super.h"
-+
-+/* protected by superblock rwsem */
-+struct aufs_branch {
-+ struct file *br_xino;
-+ readf_t br_xino_read;
-+ writef_t br_xino_write;
-+
-+ aufs_bindex_t br_id;
-+
-+ int br_perm;
-+ struct vfsmount *br_mnt;
-+ atomic_t br_count;
-+
-+ /* whiteout base */
-+ struct aufs_rwsem br_wh_rwsem;
-+ struct dentry *br_wh;
-+ atomic_t br_wh_running;
-+
-+ /* pseudo-link dir */
-+ struct dentry *br_plink;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* branch permission and attribute */
-+enum {
-+ AuBr_RW, /* writable, linkable wh */
-+ AuBr_RO, /* readonly, no wh */
-+ AuBr_RR, /* natively readonly, no wh */
-+
-+ AuBr_RWNoLinkWH, /* un-linkable whiteouts */
-+
-+ AuBr_ROWH,
-+ AuBr_RRWH, /* whiteout-able */
-+
-+ AuBr_Last
-+};
-+
-+static inline int br_writable(int brperm)
-+{
-+ return (brperm == AuBr_RW
-+ || brperm == AuBr_RWNoLinkWH);
-+}
-+
-+static inline int br_whable(int brperm)
-+{
-+ return (brperm == AuBr_RW
-+ || brperm == AuBr_ROWH
-+ || brperm == AuBr_RRWH);
-+}
-+
-+static inline int br_linkable_wh(int brperm)
-+{
-+ return (brperm == AuBr_RW);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define _AuNoNfsBranchMsg "NFS branch is not supported"
-+#if LINUX_VERSION_CODE == KERNEL_VERSION(2,6,15)
-+#define AuNoNfsBranch
-+#define AuNoNfsBranchMsg _AuNoNfsBranchMsg
-+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19) \
-+ && !defined(CONFIG_AUFS_LHASH_PATCH)
-+#define AuNoNfsBranch
-+#define AuNoNfsBranchMsg _AuNoNfsBranchMsg \
-+ ", try lhash.patch and CONFIG_AUFS_LHASH_PATCH"
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_sbinfo;
-+void free_branches(struct aufs_sbinfo *sinfo);
-+int br_rdonly(struct aufs_branch *br);
-+int find_brindex(struct super_block *sb, aufs_bindex_t br_id);
-+int find_rw_br(struct super_block *sb, aufs_bindex_t bend);
-+int find_rw_parent_br(struct dentry *dentry, aufs_bindex_t bend);
-+struct opt_add;
-+int br_add(struct super_block *sb, struct opt_add *add, int remount);
-+struct opt_del;
-+int br_del(struct super_block *sb, struct opt_del *del, int remount);
-+struct opt_mod;
-+int br_mod(struct super_block *sb, struct opt_mod *mod, int remount,
-+ int *do_update);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline int br_count(struct aufs_branch *br)
-+{
-+ return atomic_read(&br->br_count);
-+}
-+
-+static inline void br_get(struct aufs_branch *br)
-+{
-+ atomic_inc(&br->br_count);
-+}
-+
-+static inline void br_put(struct aufs_branch *br)
-+{
-+ atomic_dec(&br->br_count);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* Superblock to branch */
-+static inline aufs_bindex_t sbr_id(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return stobr(sb, bindex)->br_id;
-+}
-+
-+static inline
-+struct vfsmount *sbr_mnt(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return stobr(sb, bindex)->br_mnt;
-+}
-+
-+static inline
-+struct super_block *sbr_sb(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return sbr_mnt(sb, bindex)->mnt_sb;
-+}
-+
-+#if 0
-+static inline int sbr_count(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return br_count(stobr(sb, bindex));
-+}
-+
-+static inline void sbr_get(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ br_get(stobr(sb, bindex));
-+}
-+#endif
-+
-+static inline void sbr_put(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ br_put(stobr(sb, bindex));
-+}
-+
-+static inline int sbr_perm(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return stobr(sb, bindex)->br_perm;
-+}
-+
-+static inline int sbr_is_whable(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return br_whable(sbr_perm(sb, bindex));
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_LHASH_PATCH
-+static inline struct vfsmount *au_do_nfsmnt(struct vfsmount *h_mnt)
-+{
-+ if (!au_is_nfs(h_mnt->mnt_sb))
-+ return NULL;
-+ return h_mnt;
-+}
-+
-+/* it doesn't mntget() */
-+static inline
-+struct vfsmount *au_nfsmnt(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return au_do_nfsmnt(sbr_mnt(sb, bindex));
-+}
-+#else
-+static inline struct vfsmount *au_do_nfsmnt(struct vfsmount *h_mnt)
-+{
-+ return NULL;
-+}
-+
-+static inline
-+struct vfsmount *au_nfsmnt(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ return NULL;
-+}
-+#endif /* CONFIG_AUFS_LHASH_PATCH */
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * br_wh_read_lock, br_wh_write_lock
-+ * br_wh_read_unlock, br_wh_write_unlock, br_wh_downgrade_lock
-+ */
-+SimpleRwsemFuncs(br_wh, struct aufs_branch *br, br->br_wh_rwsem);
-+
-+/* to debug easier, do not make them inlined functions */
-+#define BrWhMustReadLock(br) do { \
-+ /* SiMustAnyLock(sb); */ \
-+ RwMustReadLock(&(br)->br_wh_rwsem); \
-+} while (0)
-+
-+#define BrWhMustWriteLock(br) do { \
-+ /* SiMustAnyLock(sb); */ \
-+ RwMustWriteLock(&(br)->br_wh_rwsem); \
-+} while (0)
-+
-+#define BrWhMustAnyLock(br) do { \
-+ /* SiMustAnyLock(sb); */ \
-+ RwMustAnyLock(&(br)->br_wh_rwsem); \
-+} while (0)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_BRANCH_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/cpup.c linux-2.6.22.1/fs/aufs/cpup.c
---- linux-2.6.22.1.oorig/fs/aufs/cpup.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/cpup.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,773 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: cpup.c,v 1.37 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#include <asm/uaccess.h>
-+#include "aufs.h"
-+
-+/* violent cpup_attr_*() functions don't care inode lock */
-+void au_cpup_attr_timesizes(struct inode *inode)
-+{
-+ struct inode *hidden_inode;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ //IMustLock(inode);
-+ hidden_inode = au_h_iptr(inode);
-+ DEBUG_ON(!hidden_inode);
-+ //IMustLock(!hidden_inode);
-+
-+ inode->i_atime = hidden_inode->i_atime;
-+ inode->i_mtime = hidden_inode->i_mtime;
-+ inode->i_ctime = hidden_inode->i_ctime;
-+ spin_lock(&inode->i_lock);
-+ i_size_write(inode, i_size_read(hidden_inode));
-+ inode->i_blocks = hidden_inode->i_blocks;
-+ spin_unlock(&inode->i_lock);
-+}
-+
-+void au_cpup_attr_nlink(struct inode *inode)
-+{
-+ struct inode *h_inode;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ //IMustLock(inode);
-+ DEBUG_ON(!inode->i_mode);
-+
-+ h_inode = au_h_iptr(inode);
-+ inode->i_nlink = h_inode->i_nlink;
-+
-+ /*
-+ * fewer nlink makes find(1) noisy, but larger nlink doesn't.
-+ * it may includes whplink directory.
-+ */
-+ if (unlikely(S_ISDIR(h_inode->i_mode))) {
-+ aufs_bindex_t bindex, bend;
-+ bend = ibend(inode);
-+ for (bindex = ibstart(inode) + 1; bindex <= bend; bindex++) {
-+ h_inode = au_h_iptr_i(inode, bindex);
-+ if (h_inode)
-+ au_add_nlink(inode, h_inode);
-+ }
-+ }
-+}
-+
-+void au_cpup_attr_changable(struct inode *inode)
-+{
-+ struct inode *hidden_inode;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ //IMustLock(inode);
-+ hidden_inode = au_h_iptr(inode);
-+ DEBUG_ON(!hidden_inode);
-+
-+ inode->i_mode = hidden_inode->i_mode;
-+ inode->i_uid = hidden_inode->i_uid;
-+ inode->i_gid = hidden_inode->i_gid;
-+ au_cpup_attr_timesizes(inode);
-+
-+ //??
-+ inode->i_flags = hidden_inode->i_flags;
-+}
-+
-+void au_cpup_igen(struct inode *inode, struct inode *h_inode)
-+{
-+ inode->i_generation = h_inode->i_generation;
-+ itoii(inode)->ii_hsb1 = h_inode->i_sb;
-+}
-+
-+void au_cpup_attr_all(struct inode *inode)
-+{
-+ struct inode *hidden_inode;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ //IMustLock(inode);
-+ hidden_inode = au_h_iptr(inode);
-+ DEBUG_ON(!hidden_inode);
-+
-+ au_cpup_attr_changable(inode);
-+ if (inode->i_nlink > 0)
-+ au_cpup_attr_nlink(inode);
-+
-+ switch (inode->i_mode & S_IFMT) {
-+ case S_IFBLK:
-+ case S_IFCHR:
-+ inode->i_rdev = hidden_inode->i_rdev;
-+ }
-+ inode->i_blkbits = hidden_inode->i_blkbits;
-+ au_cpup_attr_blksize(inode, hidden_inode);
-+ au_cpup_igen(inode, hidden_inode);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* Note: dt_dentry and dt_hidden_dentry are not dget/dput-ed */
-+
-+/* keep the timestamps of the parent dir when cpup */
-+void dtime_store(struct dtime *dt, struct dentry *dentry,
-+ struct dentry *hidden_dentry)
-+{
-+ struct inode *inode;
-+
-+ TraceEnter();
-+ DEBUG_ON(!dentry || !hidden_dentry || !hidden_dentry->d_inode);
-+
-+ dt->dt_dentry = dentry;
-+ dt->dt_h_dentry = hidden_dentry;
-+ inode = hidden_dentry->d_inode;
-+ dt->dt_atime = inode->i_atime;
-+ dt->dt_mtime = inode->i_mtime;
-+ //smp_mb();
-+}
-+
-+// todo: remove extra parameter
-+void dtime_revert(struct dtime *dt, int h_parent_is_locked)
-+{
-+ struct iattr attr;
-+ int err;
-+ struct dentry *dentry;
-+
-+ LKTRTrace("h_parent locked %d\n", h_parent_is_locked);
-+
-+ attr.ia_atime = dt->dt_atime;
-+ attr.ia_mtime = dt->dt_mtime;
-+ attr.ia_valid = ATTR_FORCE | ATTR_MTIME | ATTR_MTIME_SET
-+ | ATTR_ATIME | ATTR_ATIME_SET;
-+ //smp_mb();
-+ dentry = NULL;
-+ if (!h_parent_is_locked /* && !IS_ROOT(dt->dt_dentry) */)
-+ dentry = dt->dt_dentry;
-+ err = vfsub_notify_change(dt->dt_h_dentry, &attr,
-+ need_dlgt(dt->dt_dentry->d_sb));
-+ if (unlikely(err))
-+ Warn("restoring timestamps failed(%d). ignored\n", err);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int cpup_iattr(struct dentry *hidden_dst, struct dentry *hidden_src,
-+ int dlgt)
-+{
-+ int err;
-+ struct iattr ia;
-+ struct inode *hidden_isrc, *hidden_idst;
-+
-+ LKTRTrace("%.*s\n", DLNPair(hidden_dst));
-+ hidden_idst = hidden_dst->d_inode;
-+ //IMustLock(hidden_idst);
-+ hidden_isrc = hidden_src->d_inode;
-+ //IMustLock(hidden_isrc);
-+
-+ ia.ia_valid = ATTR_FORCE | ATTR_MODE | ATTR_UID | ATTR_GID
-+ | ATTR_ATIME | ATTR_MTIME
-+ | ATTR_ATIME_SET | ATTR_MTIME_SET;
-+ ia.ia_mode = hidden_isrc->i_mode;
-+ ia.ia_uid = hidden_isrc->i_uid;
-+ ia.ia_gid = hidden_isrc->i_gid;
-+ ia.ia_atime = hidden_isrc->i_atime;
-+ ia.ia_mtime = hidden_isrc->i_mtime;
-+ err = vfsub_notify_change(hidden_dst, &ia, dlgt);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ hidden_idst->i_flags = hidden_isrc->i_flags; //??
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * to support a sparse file which is opened with O_APPEND,
-+ * we need to close the file.
-+ */
-+static int cpup_regular(struct dentry *dentry, aufs_bindex_t bdst,
-+ aufs_bindex_t bsrc, loff_t len)
-+{
-+ int err, i, sparse;
-+ struct super_block *sb;
-+ struct inode *hidden_inode;
-+ enum {SRC, DST};
-+ struct {
-+ aufs_bindex_t bindex;
-+ unsigned int flags;
-+ struct dentry *dentry;
-+ struct file *file;
-+ void *label, *label_file;
-+ } *h, hidden[] = {
-+ {
-+ .bindex = bsrc,
-+ .flags = O_RDONLY | O_NOATIME | O_LARGEFILE,
-+ .file = NULL,
-+ .label = &&out,
-+ .label_file = &&out_src_file
-+ },
-+ {
-+ .bindex = bdst,
-+ .flags = O_WRONLY | O_NOATIME | O_LARGEFILE,
-+ .file = NULL,
-+ .label = &&out_src_file,
-+ .label_file = &&out_dst_file
-+ }
-+ };
-+
-+ LKTRTrace("dentry %.*s, bdst %d, bsrc %d, len %lld\n",
-+ DLNPair(dentry), bdst, bsrc, len);
-+ DEBUG_ON(bsrc <= bdst);
-+ DEBUG_ON(!len);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(test_ro(sb, bdst, dentry->d_inode));
-+ // bsrc branch can be ro/rw.
-+
-+ h = hidden;
-+ for (i = 0; i < 2; i++, h++) {
-+ h->dentry = au_h_dptr_i(dentry, h->bindex);
-+ DEBUG_ON(!h->dentry);
-+ hidden_inode = h->dentry->d_inode;
-+ DEBUG_ON(!hidden_inode || !S_ISREG(hidden_inode->i_mode));
-+ h->file = hidden_open(dentry, h->bindex, h->flags);
-+ //if (LktrCond)
-+ //{fput(h->file); sbr_put(sb, h->bindex); h->file = ERR_PTR(-1);}
-+ err = PTR_ERR(h->file);
-+ if (IS_ERR(h->file))
-+ goto *h->label;
-+ err = -EINVAL;
-+ if (unlikely(!h->file->f_op))
-+ goto *h->label_file;
-+ }
-+
-+ /* stop updating while we copyup */
-+ IMustLock(hidden[SRC].dentry->d_inode);
-+ sparse = 0;
-+ err = au_copy_file(hidden[DST].file, hidden[SRC].file, len, sb,
-+ &sparse);
-+
-+ /* sparse file: update i_blocks next time */
-+ if (unlikely(!err && sparse))
-+ d_drop(dentry);
-+
-+ out_dst_file:
-+ fput(hidden[DST].file);
-+ sbr_put(sb, hidden[DST].bindex);
-+ out_src_file:
-+ fput(hidden[SRC].file);
-+ sbr_put(sb, hidden[SRC].bindex);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+// unnecessary?
-+unsigned int au_flags_cpup(unsigned int init, struct dentry *parent)
-+{
-+ if (unlikely(parent && IS_ROOT(parent)))
-+ init |= CPUP_LOCKED_GHDIR;
-+ return init;
-+}
-+
-+/* return with hidden dst inode is locked */
-+static int cpup_entry(struct dentry *dentry, aufs_bindex_t bdst,
-+ aufs_bindex_t bsrc, loff_t len, unsigned int flags,
-+ int dlgt)
-+{
-+ int err, isdir, symlen;
-+ struct dentry *hidden_src, *hidden_dst, *hidden_parent, *parent;
-+ struct inode *hidden_inode, *hidden_dir, *dir;
-+ struct dtime dt;
-+ umode_t mode;
-+ char *sym;
-+ mm_segment_t old_fs;
-+ const int do_dt = flags & CPUP_DTIME;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, i%lu, bdst %d, bsrc %d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), dentry->d_inode->i_ino, bdst, bsrc, len,
-+ flags);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(bdst >= bsrc || test_ro(sb, bdst, NULL));
-+ // bsrc branch can be ro/rw.
-+
-+ hidden_src = au_h_dptr_i(dentry, bsrc);
-+ DEBUG_ON(!hidden_src);
-+ hidden_inode = hidden_src->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+
-+ /* stop refrencing while we are creating */
-+ //parent = dget_parent(dentry);
-+ parent = dentry->d_parent;
-+ dir = parent->d_inode;
-+ hidden_dst = au_h_dptr_i(dentry, bdst);
-+ DEBUG_ON(hidden_dst && hidden_dst->d_inode);
-+ //hidden_parent = dget_parent(hidden_dst);
-+ hidden_parent = hidden_dst->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ if (do_dt)
-+ dtime_store(&dt, parent, hidden_parent);
-+
-+ isdir = 0;
-+ mode = hidden_inode->i_mode;
-+ switch (mode & S_IFMT) {
-+ case S_IFREG:
-+ /* stop updating while we are referencing */
-+ IMustLock(hidden_inode);
-+ err = vfsub_create(hidden_dir, hidden_dst, mode | S_IWUSR, NULL,
-+ dlgt);
-+ //if (LktrCond) {vfs_unlink(hidden_dir, hidden_dst); err = -1;}
-+ if (!err) {
-+ loff_t l = i_size_read(hidden_inode);
-+ if (len == -1 || l < len)
-+ len = l;
-+ if (len) {
-+ err = cpup_regular(dentry, bdst, bsrc, len);
-+ //if (LktrCond) err = -1;
-+ }
-+ if (unlikely(err)) {
-+ int rerr;
-+ rerr = vfsub_unlink(hidden_dir, hidden_dst,
-+ dlgt);
-+ if (rerr) {
-+ IOErr("failed unlinking cpup-ed %.*s"
-+ "(%d, %d)\n",
-+ DLNPair(hidden_dst), err, rerr);
-+ err = -EIO;
-+ }
-+ }
-+ }
-+ break;
-+ case S_IFDIR:
-+ isdir = 1;
-+ err = vfsub_mkdir(hidden_dir, hidden_dst, mode, dlgt);
-+ //if (LktrCond) {vfs_rmdir(hidden_dir, hidden_dst); err = -1;}
-+ if (!err) {
-+ /* setattr case: dir is not locked */
-+ if (0 && ibstart(dir) == bdst)
-+ au_cpup_attr_nlink(dir);
-+ au_cpup_attr_nlink(dentry->d_inode);
-+ }
-+ break;
-+ case S_IFLNK:
-+ err = -ENOMEM;
-+ sym = __getname();
-+ //if (LktrCond) {__putname(sym); sym = NULL;}
-+ if (unlikely(!sym))
-+ break;
-+ old_fs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = symlen = hidden_inode->i_op->readlink
-+ (hidden_src, (char __user*)sym, PATH_MAX);
-+ //if (LktrCond) err = symlen = -1;
-+ set_fs(old_fs);
-+ if (symlen > 0) {
-+ sym[symlen] = 0;
-+ err = vfsub_symlink(hidden_dir, hidden_dst, sym, mode,
-+ dlgt);
-+ //if (LktrCond)
-+ //{vfs_unlink(hidden_dir, hidden_dst); err = -1;}
-+ }
-+ __putname(sym);
-+ break;
-+ case S_IFCHR:
-+ case S_IFBLK:
-+ DEBUG_ON(!capable(CAP_MKNOD));
-+ /*FALLTHROUGH*/
-+ case S_IFIFO:
-+ case S_IFSOCK:
-+ err = vfsub_mknod(hidden_dir, hidden_dst, mode,
-+ hidden_inode->i_rdev, dlgt);
-+ //if (LktrCond) {vfs_unlink(hidden_dir, hidden_dst); err = -1;}
-+ break;
-+ default:
-+ IOErr("Unknown inode type 0%o\n", mode);
-+ err = -EIO;
-+ }
-+
-+ if (do_dt)
-+ dtime_revert(&dt, flags & CPUP_LOCKED_GHDIR);
-+ //dput(parent);
-+ //dput(hidden_parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * copyup the @dentry from @bsrc to @bdst.
-+ * the caller must set the both of hidden dentries.
-+ * @len is for trucating when it is -1 copyup the entire file.
-+ */
-+int cpup_single(struct dentry *dentry, aufs_bindex_t bdst, aufs_bindex_t bsrc,
-+ loff_t len, unsigned int flags)
-+{
-+ int err, rerr, isdir, dlgt;
-+ struct dentry *hidden_src, *hidden_dst, *parent;//, *h_parent;
-+ struct inode *dst_inode, *hidden_dir, *inode, *src_inode;
-+ struct super_block *sb;
-+ aufs_bindex_t old_ibstart;
-+ struct dtime dt;
-+
-+ LKTRTrace("%.*s, i%lu, bdst %d, bsrc %d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), dentry->d_inode->i_ino, bdst, bsrc, len,
-+ flags);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(bsrc <= bdst);
-+ hidden_dst = au_h_dptr_i(dentry, bdst);
-+ DEBUG_ON(!hidden_dst || hidden_dst->d_inode);
-+ //h_parent = dget_parent(hidden_dst);
-+ //hidden_dir = h_parent->d_inode;
-+ hidden_dir = hidden_dst->d_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ hidden_src = au_h_dptr_i(dentry, bsrc);
-+ DEBUG_ON(!hidden_src || !hidden_src->d_inode);
-+ inode = dentry->d_inode;
-+ IiMustWriteLock(inode);
-+
-+ dlgt = need_dlgt(sb);
-+ dst_inode = au_h_iptr_i(inode, bdst);
-+ if (unlikely(dst_inode)) {
-+ if (unlikely(!au_flag_test(sb, AuFlag_PLINK))) {
-+ err = -EIO;
-+ IOErr("i%lu exists on a upper branch "
-+ "but plink is disabled\n", inode->i_ino);
-+ goto out;
-+ }
-+
-+ if (dst_inode->i_nlink) {
-+ hidden_src = lkup_plink(sb, bdst, inode);
-+ err = PTR_ERR(hidden_src);
-+ if (IS_ERR(hidden_src))
-+ goto out;
-+ DEBUG_ON(!hidden_src->d_inode);
-+ // vfs_link() does lock the inode
-+ err = vfsub_link(hidden_src, hidden_dir, hidden_dst, dlgt);
-+ dput(hidden_src);
-+ goto out;
-+ } else
-+ /* udba work */
-+ au_update_brange(inode, 1);
-+ }
-+
-+ old_ibstart = ibstart(inode);
-+ err = cpup_entry(dentry, bdst, bsrc, len, flags, dlgt);
-+ if (unlikely(err))
-+ goto out;
-+ dst_inode = hidden_dst->d_inode;
-+ hi_lock_child2(dst_inode);
-+
-+ //todo: test dlgt
-+ err = cpup_iattr(hidden_dst, hidden_src, dlgt);
-+ //if (LktrCond) err = -1;
-+#if 0 // xattr
-+ if (0 && !err)
-+ err = cpup_xattrs(hidden_src, hidden_dst);
-+#endif
-+ isdir = S_ISDIR(dst_inode->i_mode);
-+ if (!err) {
-+ if (bdst < old_ibstart)
-+ set_ibstart(inode, bdst);
-+ set_h_iptr(inode, bdst, igrab(dst_inode),
-+ au_hi_flags(inode, isdir));
-+ i_unlock(dst_inode);
-+ src_inode = hidden_src->d_inode;
-+ if (!isdir) {
-+ if (src_inode->i_nlink > 1
-+ && au_flag_test(sb, AuFlag_PLINK))
-+ append_plink(sb, inode, hidden_dst, bdst);
-+ else {
-+ /* braces are added to stop a warning */
-+ ;//xino_write0(sb, bsrc, src_inode->i_ino);
-+ /* ignore this error */
-+ }
-+ }
-+ //goto out; /* success */
-+ return 0; /* success */
-+ }
-+
-+ /* revert */
-+ i_unlock(dst_inode);
-+ parent = dget_parent(dentry);
-+ //dtime_store(&dt, parent, h_parent);
-+ dtime_store(&dt, parent, hidden_dst->d_parent);
-+ dput(parent);
-+ if (!isdir)
-+ rerr = vfsub_unlink(hidden_dir, hidden_dst, dlgt);
-+ else
-+ rerr = vfsub_rmdir(hidden_dir, hidden_dst, dlgt);
-+ //rerr = -1;
-+ dtime_revert(&dt, flags & CPUP_LOCKED_GHDIR);
-+ if (rerr) {
-+ IOErr("failed removing broken entry(%d, %d)\n", err, rerr);
-+ err = -EIO;
-+ }
-+
-+ out:
-+ //dput(h_parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct cpup_single_args {
-+ int *errp;
-+ struct dentry *dentry;
-+ aufs_bindex_t bdst, bsrc;
-+ loff_t len;
-+ unsigned int flags;
-+};
-+
-+static void call_cpup_single(void *args)
-+{
-+ struct cpup_single_args *a = args;
-+ *a->errp = cpup_single(a->dentry, a->bdst, a->bsrc, a->len, a->flags);
-+}
-+
-+int sio_cpup_single(struct dentry *dentry, aufs_bindex_t bdst,
-+ aufs_bindex_t bsrc, loff_t len, unsigned int flags)
-+{
-+ int err;
-+ struct dentry *hidden_dentry;
-+ umode_t mode;
-+
-+ LKTRTrace("%.*s, i%lu, bdst %d, bsrc %d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), dentry->d_inode->i_ino, bdst, bsrc, len,
-+ flags);
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bsrc);
-+ mode = hidden_dentry->d_inode->i_mode & S_IFMT;
-+ if ((mode != S_IFCHR && mode != S_IFBLK)
-+ || capable(CAP_MKNOD))
-+ err = cpup_single(dentry, bdst, bsrc, len, flags);
-+ else {
-+ struct cpup_single_args args = {
-+ .errp = &err,
-+ .dentry = dentry,
-+ .bdst = bdst,
-+ .bsrc = bsrc,
-+ .len = len,
-+ .flags = flags
-+ };
-+ au_wkq_wait(call_cpup_single, &args, /*dlgt*/0);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * copyup the @dentry from the first active hidden branch to @bdst,
-+ * using cpup_single().
-+ */
-+int cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
-+ unsigned int flags)
-+{
-+ int err;
-+ struct inode *inode;
-+ aufs_bindex_t bsrc, bend;
-+
-+ LKTRTrace("%.*s, bdst %d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), bdst, len, flags);
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!S_ISDIR(inode->i_mode) && dbstart(dentry) < bdst);
-+
-+ bend = dbend(dentry);
-+ for (bsrc = bdst + 1; bsrc <= bend; bsrc++)
-+ if (au_h_dptr_i(dentry, bsrc))
-+ break;
-+ DEBUG_ON(!au_h_dptr_i(dentry, bsrc));
-+
-+ err = lkup_neg(dentry, bdst);
-+ //err = -1;
-+ if (!err) {
-+ err = cpup_single(dentry, bdst, bsrc, len, flags);
-+ if (!err)
-+ return 0; /* success */
-+
-+ /* revert */
-+ set_h_dptr(dentry, bdst, NULL);
-+ set_dbstart(dentry, bsrc);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct cpup_simple_args {
-+ int *errp;
-+ struct dentry *dentry;
-+ aufs_bindex_t bdst;
-+ loff_t len;
-+ unsigned int flags;
-+};
-+
-+static void call_cpup_simple(void *args)
-+{
-+ struct cpup_simple_args *a = args;
-+ *a->errp = cpup_simple(a->dentry, a->bdst, a->len, a->flags);
-+}
-+
-+int sio_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
-+ unsigned int flags)
-+{
-+ int err, do_sio, dlgt;
-+ //struct dentry *parent;
-+ struct inode *hidden_dir, *dir;
-+
-+ LKTRTrace("%.*s, b%d, len %Ld, flags 0x%x\n",
-+ DLNPair(dentry), bdst, len, flags);
-+
-+ //parent = dget_parent(dentry);
-+ //dir = parent->d_inode;
-+ dir = dentry->d_parent->d_inode;
-+ hidden_dir = au_h_iptr_i(dir, bdst);
-+ dlgt = need_dlgt(dir->i_sb);
-+ do_sio = au_test_perm(hidden_dir, MAY_EXEC | MAY_WRITE, dlgt);
-+ if (!do_sio) {
-+ umode_t mode = dentry->d_inode->i_mode & S_IFMT;
-+ do_sio = ((mode == S_IFCHR || mode == S_IFBLK)
-+ && !capable(CAP_MKNOD));
-+ }
-+ if (!do_sio)
-+ err = cpup_simple(dentry, bdst, len, flags);
-+ else {
-+ struct cpup_simple_args args = {
-+ .errp = &err,
-+ .dentry = dentry,
-+ .bdst = bdst,
-+ .len = len,
-+ .flags = flags
-+ };
-+ au_wkq_wait(call_cpup_simple, &args, /*dlgt*/0);
-+ }
-+
-+ //dput(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+//todo: dcsub
-+/* cf. revalidate function in file.c */
-+int cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst, struct dentry *locked)
-+{
-+ int err;
-+ struct super_block *sb;
-+ struct dentry *d, *parent, *hidden_parent;
-+ unsigned int udba;
-+
-+ LKTRTrace("%.*s, b%d, parent i%lu, locked %p\n",
-+ DLNPair(dentry), bdst, parent_ino(dentry), locked);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(test_ro(sb, bdst, NULL));
-+ parent = dentry->d_parent;
-+ IiMustWriteLock(parent->d_inode);
-+ if (unlikely(IS_ROOT(parent)))
-+ return 0;
-+ if (locked) {
-+ DiMustAnyLock(locked);
-+ IiMustAnyLock(locked->d_inode);
-+ }
-+
-+ /* slow loop, keep it simple and stupid */
-+ err = 0;
-+ udba = au_flag_test(sb, AuFlag_UDBA_INOTIFY);
-+ while (1) {
-+ parent = dentry->d_parent; // dget_parent()
-+ hidden_parent = au_h_dptr_i(parent, bdst);
-+ if (hidden_parent)
-+ return 0; /* success */
-+
-+ /* find top dir which is needed to cpup */
-+ do {
-+ d = parent;
-+ parent = d->d_parent; // dget_parent()
-+ if (parent != locked)
-+ di_read_lock_parent3(parent, !AUFS_I_RLOCK);
-+ hidden_parent = au_h_dptr_i(parent, bdst);
-+ if (parent != locked)
-+ di_read_unlock(parent, !AUFS_I_RLOCK);
-+ } while (!hidden_parent);
-+
-+ if (d != dentry->d_parent)
-+ di_write_lock_child3(d);
-+
-+ /* somebody else might create while we were sleeping */
-+ if (!au_h_dptr_i(d, bdst) || !au_h_dptr_i(d, bdst)->d_inode) {
-+ struct inode *h_dir = hidden_parent->d_inode,
-+ *dir = parent->d_inode,
-+ *h_gdir, *gdir;
-+
-+ if (au_h_dptr_i(d, bdst))
-+ au_update_dbstart(d);
-+ //DEBUG_ON(dbstart(d) <= bdst);
-+ if (parent != locked)
-+ di_read_lock_parent3(parent, AUFS_I_RLOCK);
-+ h_gdir = gdir = NULL;
-+ if (unlikely(udba && !IS_ROOT(parent))) {
-+ gdir = parent->d_parent->d_inode;
-+ h_gdir = hidden_parent->d_parent->d_inode;
-+ hgdir_lock(h_gdir, gdir, bdst);
-+ }
-+ hdir_lock(h_dir, dir, bdst);
-+ err = sio_cpup_simple(d, bdst, -1,
-+ au_flags_cpup(CPUP_DTIME,
-+ parent));
-+ //if (LktrCond) err = -1;
-+ hdir_unlock(h_dir, dir, bdst);
-+ if (unlikely(gdir))
-+ hdir_unlock(h_gdir, gdir, bdst);
-+ if (parent != locked)
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ }
-+
-+ if (d != dentry->d_parent)
-+ di_write_unlock(d);
-+ if (unlikely(err))
-+ break;
-+ }
-+
-+// out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst,
-+ struct dentry *locked)
-+{
-+ int err;
-+ struct dentry *parent;
-+ struct inode *dir;
-+
-+ parent = dentry->d_parent;
-+ dir = parent->d_inode;
-+ LKTRTrace("%.*s, b%d, parent i%lu, locked %p\n",
-+ DLNPair(dentry), bdst, dir->i_ino, locked);
-+ DiMustReadLock(parent);
-+ IiMustReadLock(dir);
-+
-+ if (au_h_iptr_i(dir, bdst))
-+ return 0;
-+
-+ err = 0;
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ di_write_lock_parent(parent);
-+ if (au_h_iptr_i(dir, bdst))
-+ goto out;
-+
-+ err = cpup_dirs(dentry, bdst, locked);
-+
-+ out:
-+ di_downgrade_lock(parent, AUFS_I_RLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/cpup.h linux-2.6.22.1/fs/aufs/cpup.h
---- linux-2.6.22.1.oorig/fs/aufs/cpup.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/cpup.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,72 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: cpup.h,v 1.15 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_CPUP_H__
-+#define __AUFS_CPUP_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+
-+static inline
-+void au_cpup_attr_blksize(struct inode *inode, struct inode *h_inode)
-+{
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
-+ inode->i_blksize = h_inode->i_blksize;
-+#endif
-+}
-+
-+void au_cpup_attr_timesizes(struct inode *inode);
-+void au_cpup_attr_nlink(struct inode *inode);
-+void au_cpup_attr_changable(struct inode *inode);
-+void au_cpup_igen(struct inode *inode, struct inode *h_inode);
-+void au_cpup_attr_all(struct inode *inode);
-+
-+#define CPUP_DTIME 1 // do dtime_store/revert
-+// todo: remove this
-+#define CPUP_LOCKED_GHDIR 2 // grand parent hidden dir is locked
-+unsigned int au_flags_cpup(unsigned int init, struct dentry *parent);
-+
-+int cpup_single(struct dentry *dentry, aufs_bindex_t bdst, aufs_bindex_t bsrc,
-+ loff_t len, unsigned int flags);
-+int sio_cpup_single(struct dentry *dentry, aufs_bindex_t bdst,
-+ aufs_bindex_t bsrc, loff_t len, unsigned int flags);
-+int cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
-+ unsigned int flags);
-+int sio_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len,
-+ unsigned int flags);
-+
-+int cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst, struct dentry *locked);
-+int test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst,
-+ struct dentry *locked);
-+
-+/* keep timestamps when copyup */
-+struct dtime {
-+ struct dentry *dt_dentry, *dt_h_dentry;
-+ struct timespec dt_atime, dt_mtime;
-+};
-+void dtime_store(struct dtime *dt, struct dentry *dentry,
-+ struct dentry *h_dentry);
-+void dtime_revert(struct dtime *dt, int h_parent_is_locked);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_CPUP_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/dcsub.c linux-2.6.22.1/fs/aufs/dcsub.c
---- linux-2.6.22.1.oorig/fs/aufs/dcsub.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/dcsub.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,175 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dcsub.c,v 1.3 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+static void au_dpage_free(struct au_dpage *dpage)
-+{
-+ int i;
-+
-+ TraceEnter();
-+ DEBUG_ON(!dpage);
-+
-+ for (i = 0; i < dpage->ndentry; i++)
-+ dput(dpage->dentries[i]);
-+ free_page((unsigned long)dpage->dentries);
-+}
-+
-+int au_dpages_init(struct au_dcsub_pages *dpages, gfp_t gfp)
-+{
-+ int err;
-+ void *p;
-+
-+ TraceEnter();
-+
-+ err = -ENOMEM;
-+ dpages->dpages = kmalloc(sizeof(*dpages->dpages), gfp);
-+ if (unlikely(!dpages->dpages))
-+ goto out;
-+ p = (void*)__get_free_page(gfp);
-+ if (unlikely(!p))
-+ goto out_dpages;
-+ dpages->dpages[0].ndentry = 0;
-+ dpages->dpages[0].dentries = p;
-+ dpages->ndpage = 1;
-+ return 0; /* success */
-+
-+ out_dpages:
-+ kfree(dpages->dpages);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+void au_dpages_free(struct au_dcsub_pages *dpages)
-+{
-+ int i;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < dpages->ndpage; i++)
-+ au_dpage_free(dpages->dpages + i);
-+ kfree(dpages->dpages);
-+}
-+
-+static int au_dpages_append(struct au_dcsub_pages *dpages,
-+ struct dentry *dentry, gfp_t gfp)
-+{
-+ int err, sz;
-+ struct au_dpage *dpage;
-+ void *p;
-+
-+ //TraceEnter();
-+
-+ dpage = dpages->dpages + dpages->ndpage - 1;
-+ DEBUG_ON(!dpage);
-+ sz = PAGE_SIZE/sizeof(dentry);
-+ if (unlikely(dpage->ndentry >= sz)) {
-+ LKTRLabel(new dpage);
-+ err = -ENOMEM;
-+ sz = dpages->ndpage * sizeof(*dpages->dpages);
-+ p = au_kzrealloc(dpages->dpages, sz,
-+ sz + sizeof(*dpages->dpages), gfp);
-+ if (unlikely(!p))
-+ goto out;
-+ dpage = dpages->dpages + dpages->ndpage;
-+ p = (void*)__get_free_page(gfp);
-+ if (unlikely(!p))
-+ goto out;
-+ dpage->ndentry = 0;
-+ dpage->dentries = p;
-+ dpages->ndpage++;
-+ }
-+
-+ dpage->dentries[dpage->ndentry++] = dget(dentry);
-+ return 0; /* success */
-+
-+ out:
-+ //TraceErr(err);
-+ return err;
-+}
-+
-+int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root,
-+ au_dpages_test test, void *arg)
-+{
-+ int err;
-+ struct dentry *this_parent = root;
-+ struct list_head *next;
-+ struct super_block *sb = root->d_sb;
-+
-+ TraceEnter();
-+
-+ err = 0;
-+ spin_lock(&dcache_lock);
-+ repeat:
-+ next = this_parent->d_subdirs.next;
-+ resume:
-+ if (this_parent->d_sb == sb
-+ && !IS_ROOT(this_parent)
-+ && atomic_read(&this_parent->d_count)
-+ && this_parent->d_inode
-+ && (!test || test(this_parent, arg))) {
-+ err = au_dpages_append(dpages, this_parent, GFP_ATOMIC);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+
-+ while (next != &this_parent->d_subdirs) {
-+ struct list_head *tmp = next;
-+ struct dentry *dentry = list_entry(tmp, struct dentry, D_CHILD);
-+ next = tmp->next;
-+ if (unlikely(/*d_unhashed(dentry) || */!dentry->d_inode))
-+ continue;
-+ if (!list_empty(&dentry->d_subdirs)) {
-+ this_parent = dentry;
-+ goto repeat;
-+ }
-+ if (dentry->d_sb == sb
-+ && atomic_read(&dentry->d_count)
-+ && (!test || test(dentry, arg))) {
-+ err = au_dpages_append(dpages, dentry, GFP_ATOMIC);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+ }
-+
-+ if (this_parent != root) {
-+ next = this_parent->D_CHILD.next;
-+ this_parent = this_parent->d_parent;
-+ goto resume;
-+ }
-+ out:
-+ spin_unlock(&dcache_lock);
-+#if 0
-+ if (!err) {
-+ int i, j;
-+ j = 0;
-+ for (i = 0; i < dpages->ndpage; i++) {
-+ if ((dpages->dpages + i)->ndentry)
-+ Dbg("%d: %d\n", i, (dpages->dpages + i)->ndentry);
-+ j += (dpages->dpages + i)->ndentry;
-+ }
-+ if (j)
-+ Dbg("ndpage %d, %d\n", dpages->ndpage, j);
-+ }
-+#endif
-+ TraceErr(err);
-+ return err;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/dcsub.h linux-2.6.22.1/fs/aufs/dcsub.h
---- linux-2.6.22.1.oorig/fs/aufs/dcsub.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/dcsub.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,47 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dcsub.h,v 1.2 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_DCSUB_H__
-+#define __AUFS_DCSUB_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/dcache.h>
-+
-+struct au_dpage {
-+ int ndentry;
-+ struct dentry **dentries;
-+};
-+
-+struct au_dcsub_pages {
-+ int ndpage;
-+ struct au_dpage *dpages;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int au_dpages_init(struct au_dcsub_pages *dpages, gfp_t gfp);
-+void au_dpages_free(struct au_dcsub_pages *dpages);
-+typedef int (*au_dpages_test)(struct dentry *dentry, void *arg);
-+int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root,
-+ au_dpages_test test, void *arg);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_DCSUB_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/debug.c linux-2.6.22.1/fs/aufs/debug.c
---- linux-2.6.22.1.oorig/fs/aufs/debug.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/debug.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,262 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: debug.c,v 1.27 2007/04/30 05:48:23 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+atomic_t aufs_cond = ATOMIC_INIT(0);
-+
-+#if defined(CONFIG_LKTR) || defined(CONFIG_LKTR_MODULE)
-+#define dpri(fmt, arg...) \
-+ do {if (LktrCond) printk(KERN_DEBUG fmt, ##arg);} while (0)
-+#else
-+#define dpri(fmt, arg...) printk(KERN_DEBUG fmt, ##arg)
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void au_dpri_whlist(struct aufs_nhash *whlist)
-+{
-+ int i;
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos;
-+
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ head = whlist->heads + i;
-+ hlist_for_each_entry(tpos, pos, head, wh_hash)
-+ dpri("b%d, %.*s, %d\n",
-+ tpos->wh_bindex,
-+ tpos->wh_str.len, tpos->wh_str.name,
-+ tpos->wh_str.len);
-+ }
-+}
-+
-+void au_dpri_vdir(struct aufs_vdir *vdir)
-+{
-+ int i;
-+ union aufs_deblk_p p;
-+ unsigned char *o;
-+
-+ if (!vdir || IS_ERR(vdir)) {
-+ dpri("err %ld\n", PTR_ERR(vdir));
-+ return;
-+ }
-+
-+ dpri("nblk %d, deblk %p %d, last{%d, %p}, ver %lu\n",
-+ vdir->vd_nblk, vdir->vd_deblk, ksize(vdir->vd_deblk),
-+ vdir->vd_last.i, vdir->vd_last.p.p, vdir->vd_version);
-+ for (i = 0; i < vdir->vd_nblk; i++) {
-+ p.deblk = vdir->vd_deblk[i];
-+ o = p.p;
-+ dpri("[%d]: %p %d\n", i, o, ksize(o));
-+#if 0 // verbose
-+ int j;
-+ for (j = 0; j < 8; j++) {
-+ dpri("%p(+%d) {%02x %02x %02x %02x %02x %02x %02x %02x "
-+ "%02x %02x %02x %02x %02x %02x %02x %02x}\n",
-+ p.p, p.p - o,
-+ p.p[0], p.p[1], p.p[2], p.p[3],
-+ p.p[4], p.p[5], p.p[6], p.p[7],
-+ p.p[8], p.p[9], p.p[10], p.p[11],
-+ p.p[12], p.p[13], p.p[14], p.p[15]);
-+ p.p += 16;
-+ }
-+#endif
-+ }
-+}
-+
-+static int do_pri_inode(aufs_bindex_t bindex, struct inode *inode)
-+{
-+ if (!inode || IS_ERR(inode)) {
-+ dpri("i%d: err %ld\n", bindex, PTR_ERR(inode));
-+ return -1;
-+ }
-+
-+ /* the type of i_blocks depends upon CONFIG_LSF */
-+ BUILD_BUG_ON(sizeof(inode->i_blocks) != sizeof(unsigned long)
-+ && sizeof(inode->i_blocks) != sizeof(u64));
-+ dpri("i%d: i%lu, %s, cnt %d, nl %u, 0%o, sz %Lu, blk %Lu,"
-+ " ct %Ld, np %lu, st 0x%lx, g %x\n",
-+ bindex,
-+ inode->i_ino, inode->i_sb ? au_sbtype(inode->i_sb) : "??",
-+ atomic_read(&inode->i_count), inode->i_nlink, inode->i_mode,
-+ i_size_read(inode), (u64)inode->i_blocks,
-+ timespec_to_ns(&inode->i_ctime) & 0x0ffff,
-+ inode->i_mapping ? inode->i_mapping->nrpages : 0,
-+ inode->i_state, inode->i_generation);
-+ return 0;
-+}
-+
-+void au_dpri_inode(struct inode *inode)
-+{
-+ struct aufs_iinfo *iinfo;
-+ aufs_bindex_t bindex;
-+ int err;
-+
-+ err = do_pri_inode(-1, inode);
-+ if (err || !au_is_aufs(inode->i_sb))
-+ return;
-+
-+ iinfo = itoii(inode);
-+ if (!iinfo)
-+ return;
-+ dpri("i-1: bstart %d, bend %d, gen %d\n",
-+ iinfo->ii_bstart, iinfo->ii_bend, au_iigen(inode));
-+ if (iinfo->ii_bstart < 0)
-+ return;
-+ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend; bindex++)
-+ do_pri_inode(bindex, iinfo->ii_hinode[0 + bindex].hi_inode);
-+}
-+
-+static int do_pri_dentry(aufs_bindex_t bindex, struct dentry *dentry)
-+{
-+ if (!dentry || IS_ERR(dentry)) {
-+ dpri("d%d: err %ld\n", bindex, PTR_ERR(dentry));
-+ return -1;
-+ }
-+ dpri("d%d: %.*s/%.*s, %s, cnt %d, flags 0x%x\n",
-+ bindex,
-+ DLNPair(dentry->d_parent), DLNPair(dentry),
-+ dentry->d_sb ? au_sbtype(dentry->d_sb) : "??",
-+ atomic_read(&dentry->d_count), dentry->d_flags);
-+ do_pri_inode(bindex, dentry->d_inode);
-+ return 0;
-+}
-+
-+void au_dpri_dentry(struct dentry *dentry)
-+{
-+ struct aufs_dinfo *dinfo;
-+ aufs_bindex_t bindex;
-+ int err;
-+
-+ err = do_pri_dentry(-1, dentry);
-+ if (err || !au_is_aufs(dentry->d_sb))
-+ return;
-+
-+ dinfo = dtodi(dentry);
-+ if (!dinfo)
-+ return;
-+ dpri("d-1: bstart %d, bend %d, bwh %d, bdiropq %d, gen %d\n",
-+ dinfo->di_bstart, dinfo->di_bend,
-+ dinfo->di_bwh, dinfo->di_bdiropq, au_digen(dentry));
-+ if (dinfo->di_bstart < 0)
-+ return;
-+ for (bindex = dinfo->di_bstart; bindex <= dinfo->di_bend; bindex++)
-+ do_pri_dentry(bindex, dinfo->di_hdentry[0 + bindex].hd_dentry);
-+}
-+
-+static int do_pri_file(aufs_bindex_t bindex, struct file *file)
-+{
-+ char a[32];
-+
-+ if (!file || IS_ERR(file)) {
-+ dpri("f%d: err %ld\n", bindex, PTR_ERR(file));
-+ return -1;
-+ }
-+ a[0] = 0;
-+ if (bindex == -1 && ftofi(file))
-+ snprintf(a, sizeof(a), ", mmapped %d", au_is_mmapped(file));
-+ dpri("f%d: mode 0x%x, flags 0%o, cnt %d, pos %Lu%s\n",
-+ bindex, file->f_mode, file->f_flags, file_count(file),
-+ file->f_pos, a);
-+ do_pri_dentry(bindex, file->f_dentry);
-+ return 0;
-+}
-+
-+void au_dpri_file(struct file *file)
-+{
-+ struct aufs_finfo *finfo;
-+ aufs_bindex_t bindex;
-+ int err;
-+
-+ err = do_pri_file(-1, file);
-+ if (err || !file->f_dentry || !au_is_aufs(file->f_dentry->d_sb))
-+ return;
-+
-+ finfo = ftofi(file);
-+ if (!finfo)
-+ return;
-+ if (finfo->fi_bstart < 0)
-+ return;
-+ for (bindex = finfo->fi_bstart; bindex <= finfo->fi_bend; bindex++) {
-+ struct aufs_hfile *hf;
-+ //dpri("bindex %d\n", bindex);
-+ hf = finfo->fi_hfile + bindex;
-+ do_pri_file(bindex, hf ? hf->hf_file : NULL);
-+ }
-+}
-+
-+static int do_pri_br(aufs_bindex_t bindex, struct aufs_branch *br)
-+{
-+ struct vfsmount *mnt;
-+ struct super_block *sb;
-+
-+ if (!br || IS_ERR(br)
-+ || !(mnt = br->br_mnt) || IS_ERR(mnt)
-+ || !(sb = mnt->mnt_sb) || IS_ERR(sb)) {
-+ dpri("s%d: err %ld\n", bindex, PTR_ERR(br));
-+ return -1;
-+ }
-+
-+ dpri("s%d: {perm 0x%x, cnt %d}, "
-+ "%s, flags 0x%lx, cnt(BIAS) %d, active %d, xino %p %p\n",
-+ bindex, br->br_perm, br_count(br),
-+ au_sbtype(sb), sb->s_flags, sb->s_count - S_BIAS,
-+ atomic_read(&sb->s_active), br->br_xino,
-+ br->br_xino ? br->br_xino->f_dentry : NULL);
-+ return 0;
-+}
-+
-+void au_dpri_sb(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ aufs_bindex_t bindex;
-+ int err;
-+ struct vfsmount mnt = {.mnt_sb = sb};
-+ struct aufs_branch fake = {
-+ .br_perm = 0,
-+ .br_mnt = &mnt,
-+ .br_count = ATOMIC_INIT(0),
-+ .br_xino = NULL
-+ };
-+
-+ atomic_set(&fake.br_count, 0);
-+ err = do_pri_br(-1, &fake);
-+ dpri("dev 0x%x\n", sb->s_dev);
-+ if (err || !au_is_aufs(sb))
-+ return;
-+
-+ sbinfo = stosi(sb);
-+ if (!sbinfo)
-+ return;
-+ for (bindex = 0; bindex <= sbinfo->si_bend; bindex++) {
-+ //dpri("bindex %d\n", bindex);
-+ do_pri_br(bindex, sbinfo->si_branch[0 + bindex]);
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void DbgSleep(int sec)
-+{
-+ static DECLARE_WAIT_QUEUE_HEAD(wq);
-+ Dbg("sleep %d sec\n", sec);
-+ wait_event_timeout(wq, 0, sec * HZ);
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/debug.h linux-2.6.22.1/fs/aufs/debug.h
---- linux-2.6.22.1.oorig/fs/aufs/debug.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/debug.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,129 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: debug.h,v 1.31 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_DEBUG_H__
-+#define __AUFS_DEBUG_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+#define DEBUG_ON(a) BUG_ON(a)
-+extern atomic_t aufs_cond;
-+#define au_debug_on() atomic_inc(&aufs_cond)
-+#define au_debug_off() atomic_dec(&aufs_cond)
-+#define au_is_debug() atomic_read(&aufs_cond)
-+#else
-+#define DEBUG_ON(a) /* */
-+#define au_debug_on() /* */
-+#define au_debug_off() /* */
-+#define au_is_debug() 0
-+#endif
-+
-+#define MtxMustLock(mtx) DEBUG_ON(!mutex_is_locked(mtx))
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* debug print */
-+#if defined(CONFIG_LKTR) || defined(CONFIG_LKTR_MODULE)
-+#include <linux/lktr.h>
-+#ifdef CONFIG_AUFS_DEBUG
-+#undef LktrCond
-+#define LktrCond unlikely((lktr_cond && lktr_cond()) || au_is_debug())
-+#endif
-+#else
-+#define LktrCond au_is_debug()
-+#define LKTRDumpVma(pre, vma, suf) /* */
-+#define LKTRDumpStack() /* */
-+#define LKTRTrace(fmt, args...) do { \
-+ if (LktrCond) \
-+ Dbg(fmt, ##args); \
-+} while (0)
-+#define LKTRLabel(label) LKTRTrace("%s\n", #label)
-+#endif /* CONFIG_LKTR */
-+
-+#define TraceErr(e) do { \
-+ if (unlikely((e) < 0)) \
-+ LKTRTrace("err %d\n", (int)(e)); \
-+} while (0)
-+#define TraceErrPtr(p) do { \
-+ if (IS_ERR(p)) \
-+ LKTRTrace("err %ld\n", PTR_ERR(p)); \
-+} while (0)
-+#define TraceEnter() LKTRLabel(enter)
-+
-+/* dirty macros for debug print, use with "%.*s" and caution */
-+#define LNPair(qstr) (qstr)->len,(qstr)->name
-+#define DLNPair(d) LNPair(&(d)->d_name)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define Dpri(lvl, fmt, arg...) \
-+ printk(lvl AUFS_NAME " %s:%d:%s[%d]: " fmt, \
-+ __func__, __LINE__, current->comm, current->pid, ##arg)
-+#define Dbg(fmt, arg...) Dpri(KERN_DEBUG, fmt, ##arg)
-+#define Warn(fmt, arg...) Dpri(KERN_WARNING, fmt, ##arg)
-+#define Warn1(fmt, arg...) do { \
-+ static unsigned char c; \
-+ if (!c++) Warn(fmt, ##arg); \
-+ } while (0)
-+#define Err(fmt, arg...) Dpri(KERN_ERR, fmt, ##arg)
-+#define Err1(fmt, arg...) do { \
-+ static unsigned char c; \
-+ if (!c++) Err(fmt, ##arg); \
-+ } while (0)
-+#define IOErr(fmt, arg...) Err("I/O Error, " fmt, ##arg)
-+#define IOErr1(fmt, arg...) do { \
-+ static unsigned char c; \
-+ if (!c++) IOErr(fmt, ##arg); \
-+ } while (0)
-+#define IOErrWhck(fmt, arg...) Err("I/O Error, try whck. " fmt, ##arg)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+struct aufs_nhash;
-+void au_dpri_whlist(struct aufs_nhash *whlist);
-+struct aufs_vdir;
-+void au_dpri_vdir(struct aufs_vdir *vdir);
-+void au_dpri_inode(struct inode *inode);
-+void au_dpri_dentry(struct dentry *dentry);
-+void au_dpri_file(struct file *filp);
-+void au_dpri_sb(struct super_block *sb);
-+#define DbgWhlist(w) do{LKTRTrace(#w "\n"); au_dpri_whlist(w);}while(0)
-+#define DbgVdir(v) do{LKTRTrace(#v "\n"); au_dpri_vdir(v);}while(0)
-+#define DbgInode(i) do{LKTRTrace(#i "\n"); au_dpri_inode(i);}while(0)
-+#define DbgDentry(d) do{LKTRTrace(#d "\n"); au_dpri_dentry(d);}while(0)
-+#define DbgFile(f) do{LKTRTrace(#f "\n"); au_dpri_file(f);}while(0)
-+#define DbgSb(sb) do{LKTRTrace(#sb "\n"); au_dpri_sb(sb);}while(0)
-+void DbgSleep(int sec);
-+#else
-+#define DbgWhlist(w) /* */
-+#define DbgVdir(v) /* */
-+#define DbgInode(i) /* */
-+#define DbgDentry(d) /* */
-+#define DbgFile(f) /* */
-+#define DbgSb(sb) /* */
-+#define DbgSleep(sec) /* */
-+#endif
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_DEBUG_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/dentry.c linux-2.6.22.1/fs/aufs/dentry.c
---- linux-2.6.22.1.oorig/fs/aufs/dentry.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/dentry.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,946 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dentry.c,v 1.41 2007/05/14 03:38:38 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include "aufs.h"
-+
-+#ifdef CONFIG_AUFS_LHASH_PATCH
-+
-+#ifdef CONFIG_AUFS_DLGT
-+struct lookup_hash_args {
-+ struct dentry **errp;
-+ struct qstr *name;
-+ struct dentry *base;
-+ struct nameidata *nd;
-+};
-+
-+static void call_lookup_hash(void *args)
-+{
-+ struct lookup_hash_args *a = args;
-+ *a->errp = __lookup_hash(a->name, a->base, a->nd);
-+}
-+#endif /* CONFIG_AUFS_DLGT */
-+
-+static struct dentry *lkup_hash(const char *name, struct dentry *parent,
-+ int len, struct lkup_args *lkup)
-+{
-+ struct dentry *dentry;
-+ char *p;
-+ unsigned long hash;
-+ struct qstr this;
-+ unsigned int c;
-+ struct nameidata tmp_nd;
-+
-+ dentry = ERR_PTR(-EACCES);
-+ this.name = name;
-+ this.len = len;
-+ if (unlikely(!len))
-+ goto out;
-+
-+ p = (void*)name;
-+ hash = init_name_hash();
-+ while (len--) {
-+ c = *p++;
-+ if (unlikely(c == '/' || c == '\0'))
-+ goto out;
-+ hash = partial_name_hash(c, hash);
-+ }
-+ this.hash = end_name_hash(hash);
-+
-+ memset(&tmp_nd, 0, sizeof(tmp_nd));
-+ tmp_nd.dentry = dget(parent);
-+ tmp_nd.mnt = mntget(lkup->nfsmnt);
-+#ifndef CONFIG_AUFS_DLGT
-+ dentry = __lookup_hash(&this, parent, &tmp_nd);
-+#else
-+ if (!lkup->dlgt)
-+ dentry = __lookup_hash(&this, parent, &tmp_nd);
-+ else {
-+ struct lookup_hash_args args = {
-+ .errp = &dentry,
-+ .name = &this,
-+ .base = parent,
-+ .nd = &tmp_nd
-+ };
-+ au_wkq_wait(call_lookup_hash, &args, /*dlgt*/1);
-+ }
-+#endif
-+ path_release(&tmp_nd);
-+
-+ out:
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+#elif defined(CONFIG_AUFS_DLGT)
-+static struct dentry *lkup_hash(const char *name, struct dentry *parent,
-+ int len, struct lkup_args *lkup)
-+{
-+ return ERR_PTR(-ENOSYS);
-+}
-+#endif
-+
-+#ifdef CONFIG_AUFS_DLGT
-+struct lookup_one_len_args {
-+ struct dentry **errp;
-+ const char *name;
-+ struct dentry *parent;
-+ int len;
-+};
-+
-+static void call_lookup_one_len(void *args)
-+{
-+ struct lookup_one_len_args *a = args;
-+ *a->errp = lookup_one_len(a->name, a->parent, a->len);
-+}
-+#endif /* CONFIG_AUFS_DLGT */
-+
-+#if defined(CONFIG_AUFS_LHASH_PATCH) || defined(CONFIG_AUFS_DLGT)
-+/* cf. lookup_one_len() in linux/fs/namei.c */
-+struct dentry *lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup)
-+{
-+ struct dentry *dentry;
-+
-+ LKTRTrace("%.*s/%.*s, lkup{%p, %d}\n",
-+ DLNPair(parent), len, name, lkup->nfsmnt, lkup->dlgt);
-+
-+ if (!lkup->nfsmnt) {
-+#ifndef CONFIG_AUFS_DLGT
-+ dentry = lookup_one_len(name, parent, len);
-+#else
-+ if (!lkup->dlgt)
-+ dentry = lookup_one_len(name, parent, len);
-+ else {
-+ struct lookup_one_len_args args = {
-+ .errp = &dentry,
-+ .name = name,
-+ .parent = parent,
-+ .len = len
-+ };
-+ au_wkq_wait(call_lookup_one_len, &args, /*dlgt*/1);
-+ }
-+#endif
-+ } else
-+ dentry = lkup_hash(name, parent, len, lkup);
-+
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+#endif
-+
-+struct lkup_one_args {
-+ struct dentry **errp;
-+ const char *name;
-+ struct dentry *parent;
-+ int len;
-+ struct lkup_args *lkup;
-+};
-+
-+static void call_lkup_one(void *args)
-+{
-+ struct lkup_one_args *a = args;
-+ *a->errp = lkup_one(a->name, a->parent, a->len, a->lkup);
-+}
-+
-+/*
-+ * returns positive/negative dentry, NULL or an error.
-+ * NULL means whiteout-ed or not-found.
-+ */
-+static struct dentry *do_lookup(struct dentry *hidden_parent,
-+ struct dentry *dentry, aufs_bindex_t bindex,
-+ struct qstr *wh_name, int allow_neg,
-+ mode_t type, int dlgt)
-+{
-+ struct dentry *hidden_dentry;
-+ int wh_found, wh_able, opq;
-+ struct inode *hidden_dir, *hidden_inode;
-+ struct qstr *name;
-+ struct super_block *sb;
-+ struct lkup_args lkup = {.dlgt = dlgt};
-+
-+ LKTRTrace("%.*s/%.*s, b%d, allow_neg %d, type 0%o, dlgt %d\n",
-+ DLNPair(hidden_parent), DLNPair(dentry), bindex, allow_neg,
-+ type, dlgt);
-+ DEBUG_ON(IS_ROOT(dentry));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ wh_found = 0;
-+ sb = dentry->d_sb;
-+ wh_able = sbr_is_whable(sb, bindex);
-+ lkup.nfsmnt = au_nfsmnt(sb, bindex);
-+ name = &dentry->d_name;
-+ if (unlikely(wh_able)) {
-+#if 0 //def CONFIG_AUFS_ROBR
-+ if (strncmp(name->name, AUFS_WH_PFX, AUFS_WH_PFX_LEN))
-+ wh_found = is_wh(hidden_parent, wh_name, /*try_sio*/0,
-+ &lkup);
-+ else
-+ wh_found = -EPERM;
-+#else
-+ wh_found = is_wh(hidden_parent, wh_name, /*try_sio*/0, &lkup);
-+#endif
-+ }
-+ //if (LktrCond) wh_found = -1;
-+ hidden_dentry = ERR_PTR(wh_found);
-+ if (!wh_found)
-+ goto real_lookup;
-+ if (unlikely(wh_found < 0))
-+ goto out;
-+
-+ /* We found a whiteout */
-+ //set_dbend(dentry, bindex);
-+ set_dbwh(dentry, bindex);
-+ if (!allow_neg)
-+ return NULL; /* success */
-+
-+ real_lookup:
-+ // do not superio.
-+ hidden_dentry = lkup_one(name->name, hidden_parent, name->len, &lkup);
-+ //if (LktrCond) {dput(hidden_dentry); hidden_dentry = ERR_PTR(-1);}
-+ if (IS_ERR(hidden_dentry))
-+ goto out;
-+ DEBUG_ON(d_unhashed(hidden_dentry));
-+ hidden_inode = hidden_dentry->d_inode;
-+ if (!hidden_inode) {
-+ if (!allow_neg)
-+ goto out_neg;
-+ } else if (wh_found
-+ || (type && type != (hidden_inode->i_mode & S_IFMT)))
-+ goto out_neg;
-+
-+ if (dbend(dentry) <= bindex)
-+ set_dbend(dentry, bindex);
-+ if (dbstart(dentry) == -1 || bindex < dbstart(dentry))
-+ set_dbstart(dentry, bindex);
-+ set_h_dptr(dentry, bindex, hidden_dentry);
-+
-+ if (!hidden_inode || !S_ISDIR(hidden_inode->i_mode) || !wh_able)
-+ return hidden_dentry; /* success */
-+
-+ hi_lock_child(hidden_inode);
-+ opq = is_diropq(hidden_dentry, &lkup);
-+ //if (LktrCond) opq = -1;
-+ i_unlock(hidden_inode);
-+ if (opq > 0)
-+ set_dbdiropq(dentry, bindex);
-+ else if (unlikely(opq < 0)) {
-+ set_h_dptr(dentry, bindex, NULL);
-+ hidden_dentry = ERR_PTR(opq);
-+ }
-+ goto out;
-+
-+ out_neg:
-+ dput(hidden_dentry);
-+ hidden_dentry = NULL;
-+ out:
-+ TraceErrPtr(hidden_dentry);
-+ return hidden_dentry;
-+}
-+
-+/*
-+ * returns the number of hidden positive dentries,
-+ * otherwise an error.
-+ */
-+int lkup_dentry(struct dentry *dentry, aufs_bindex_t bstart, mode_t type)
-+{
-+ int npositive, err, allow_neg, dlgt;
-+ struct dentry *parent;
-+ aufs_bindex_t bindex, btail;
-+ const struct qstr *name = &dentry->d_name;
-+ struct qstr whname;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, b%d, type 0%o\n", LNPair(name), bstart, type);
-+ DEBUG_ON(bstart < 0 || IS_ROOT(dentry));
-+ parent = dget_parent(dentry);
-+
-+#if 1 //ndef CONFIG_AUFS_ROBR
-+ err = -EPERM;
-+ if (unlikely(!strncmp(name->name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)))
-+ goto out;
-+#endif
-+
-+ err = au_alloc_whname(name->name, name->len, &whname);
-+ //if (LktrCond) {au_free_whname(&whname); err = -1;}
-+ if (unlikely(err))
-+ goto out;
-+
-+ sb = dentry->d_sb;
-+ dlgt = need_dlgt(sb);
-+ allow_neg = !type;
-+ npositive = 0;
-+ btail = dbtaildir(parent);
-+ for (bindex = bstart; bindex <= btail; bindex++) {
-+ struct dentry *hidden_parent, *hidden_dentry;
-+ struct inode *hidden_inode;
-+ struct inode *hidden_dir;
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (hidden_dentry) {
-+ if (hidden_dentry->d_inode)
-+ npositive++;
-+ if (type != S_IFDIR)
-+ break;
-+ continue;
-+ }
-+ hidden_parent = au_h_dptr_i(parent, bindex);
-+ if (!hidden_parent)
-+ continue;
-+ hidden_dir = hidden_parent->d_inode;
-+ if (!hidden_dir || !S_ISDIR(hidden_dir->i_mode))
-+ continue;
-+
-+ hi_lock_parent(hidden_dir);
-+ hidden_dentry = do_lookup(hidden_parent, dentry, bindex,
-+ &whname, allow_neg, type, dlgt);
-+ // do not dput for testing
-+ //if (LktrCond) {hidden_dentry = ERR_PTR(-1);}
-+ i_unlock(hidden_dir);
-+ err = PTR_ERR(hidden_dentry);
-+ if (IS_ERR(hidden_dentry))
-+ goto out_wh;
-+ allow_neg = 0;
-+
-+ if (dbwh(dentry) != -1)
-+ break;
-+ if (!hidden_dentry)
-+ continue;
-+ hidden_inode = hidden_dentry->d_inode;
-+ if (!hidden_inode)
-+ continue;
-+ npositive++;
-+ if (!type)
-+ type = hidden_inode->i_mode & S_IFMT;
-+ if (type != S_IFDIR)
-+ break;
-+ else if (dbdiropq(dentry) != -1)
-+ break;
-+ }
-+
-+ if (npositive) {
-+ LKTRLabel(positive);
-+ au_update_dbstart(dentry);
-+ }
-+ err = npositive;
-+
-+ out_wh:
-+ au_free_whname(&whname);
-+ out:
-+ dput(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct dentry *sio_lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup)
-+{
-+ struct dentry *dentry;
-+
-+ LKTRTrace("%.*s/%.*s\n", DLNPair(parent), len, name);
-+ IMustLock(parent->d_inode);
-+
-+ if (!au_test_perm(parent->d_inode, MAY_EXEC, lkup->dlgt))
-+ dentry = lkup_one(name, parent, len, lkup);
-+ else {
-+ // ugly
-+ int dlgt = lkup->dlgt;
-+ struct lkup_one_args args = {
-+ .errp = &dentry,
-+ .name = name,
-+ .parent = parent,
-+ .len = len,
-+ .lkup = lkup
-+ };
-+
-+ lkup->dlgt = 0;
-+ au_wkq_wait(call_lkup_one, &args, /*dlgt*/0);
-+ lkup->dlgt = dlgt;
-+ }
-+
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+
-+/*
-+ * lookup @dentry on @bindex which should be negative.
-+ */
-+int lkup_neg(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ int err;
-+ struct dentry *parent, *hidden_parent, *hidden_dentry;
-+ struct inode *hidden_dir;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, b%d\n", DLNPair(dentry), bindex);
-+ parent = dget_parent(dentry);
-+ DEBUG_ON(!parent || !parent->d_inode
-+ || !S_ISDIR(parent->d_inode->i_mode));
-+ hidden_parent = au_h_dptr_i(parent, bindex);
-+ DEBUG_ON(!hidden_parent);
-+ hidden_dir = hidden_parent->d_inode;
-+ DEBUG_ON(!hidden_dir || !S_ISDIR(hidden_dir->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ lkup.nfsmnt = au_nfsmnt(dentry->d_sb, bindex);
-+ lkup.dlgt = need_dlgt(dentry->d_sb);
-+ hidden_dentry = sio_lkup_one(dentry->d_name.name, hidden_parent,
-+ dentry->d_name.len, &lkup);
-+ //if (LktrCond) {dput(hidden_dentry); hidden_dentry = ERR_PTR(-1);}
-+ err = PTR_ERR(hidden_dentry);
-+ if (IS_ERR(hidden_dentry))
-+ goto out;
-+ if (unlikely(hidden_dentry->d_inode)) {
-+ err = -EIO;
-+ IOErr("b%d %.*s should be negative.%s\n",
-+ bindex, DLNPair(hidden_dentry),
-+ au_flag_test(dentry->d_sb, AuFlag_UDBA_INOTIFY) ? "" :
-+ " Try udba=inotify.");
-+ dput(hidden_dentry);
-+ goto out;
-+ }
-+
-+ if (bindex < dbstart(dentry))
-+ set_dbstart(dentry, bindex);
-+ if (dbend(dentry) < bindex)
-+ set_dbend(dentry, bindex);
-+ set_h_dptr(dentry, bindex, hidden_dentry);
-+ err = 0;
-+
-+ out:
-+ dput(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * returns the number of found hidden positive dentries,
-+ * otherwise an error.
-+ */
-+int au_refresh_hdentry(struct dentry *dentry, mode_t type)
-+{
-+ int npositive, pgen, new_sz, sgen, dgen;
-+ struct aufs_dinfo *dinfo;
-+ struct super_block *sb;
-+ struct dentry *parent;
-+ aufs_bindex_t bindex, parent_bend, parent_bstart, bwh, bdiropq, bend;
-+ struct aufs_hdentry *p;
-+ //struct nameidata nd;
-+
-+ LKTRTrace("%.*s, type 0%o\n", DLNPair(dentry), type);
-+ DiMustWriteLock(dentry);
-+ sb = dentry->d_sb;
-+ DEBUG_ON(IS_ROOT(dentry));
-+ parent = dget_parent(dentry);
-+ pgen = au_digen(parent);
-+ sgen = au_sigen(sb);
-+ dgen = au_digen(dentry);
-+ DEBUG_ON(pgen != sgen);
-+
-+ npositive = -ENOMEM;
-+ new_sz = sizeof(*dinfo->di_hdentry) * (sbend(sb) + 1);
-+ dinfo = dtodi(dentry);
-+ p = au_kzrealloc(dinfo->di_hdentry, sizeof(*p) * (dinfo->di_bend + 1),
-+ new_sz, GFP_KERNEL);
-+ //p = NULL;
-+ if (unlikely(!p))
-+ goto out;
-+ dinfo->di_hdentry = p;
-+
-+ bend = dinfo->di_bend;
-+ bwh = dinfo->di_bwh;
-+ bdiropq = dinfo->di_bdiropq;
-+ p += dinfo->di_bstart;
-+ for (bindex = dinfo->di_bstart; bindex <= bend; bindex++, p++) {
-+ struct dentry *hd, *hdp;
-+ struct aufs_hdentry tmp, *q;
-+ aufs_bindex_t new_bindex;
-+
-+ hd = p->hd_dentry;
-+ if (!hd)
-+ continue;
-+ hdp = dget_parent(hd);
-+ if (hdp == au_h_dptr_i(parent, bindex)) {
-+ dput(hdp);
-+ continue;
-+ }
-+
-+ new_bindex = au_find_dbindex(parent, hdp);
-+ dput(hdp);
-+ DEBUG_ON(new_bindex == bindex);
-+ if (dinfo->di_bwh == bindex)
-+ bwh = new_bindex;
-+ if (dinfo->di_bdiropq == bindex)
-+ bdiropq = new_bindex;
-+ if (new_bindex < 0) { // test here
-+ hdput(p);
-+ p->hd_dentry = NULL;
-+ continue;
-+ }
-+ /* swap two hidden dentries, and loop again */
-+ q = dinfo->di_hdentry + new_bindex;
-+ tmp = *q;
-+ *q = *p;
-+ *p = tmp;
-+ if (tmp.hd_dentry) {
-+ bindex--;
-+ p--;
-+ }
-+ }
-+
-+ // test here
-+ dinfo->di_bwh = -1;
-+ if (unlikely(bwh != -1 && bwh <= sbend(sb) && sbr_is_whable(sb, bwh)))
-+ dinfo->di_bwh = bwh;
-+ dinfo->di_bdiropq = -1;
-+ if (unlikely(bdiropq != -1 && bdiropq <= sbend(sb)
-+ && sbr_is_whable(sb, bdiropq)))
-+ dinfo->di_bdiropq = bdiropq;
-+ parent_bend = dbend(parent);
-+ p = dinfo->di_hdentry;
-+ for (bindex = 0; bindex <= parent_bend; bindex++, p++)
-+ if (p->hd_dentry) {
-+ dinfo->di_bstart = bindex;
-+ break;
-+ }
-+ p = dinfo->di_hdentry + parent_bend;
-+ //for (bindex = parent_bend; bindex > dinfo->di_bstart; bindex--, p--)
-+ for (bindex = parent_bend; bindex >= 0; bindex--, p--)
-+ if (p->hd_dentry) {
-+ dinfo->di_bend = bindex;
-+ break;
-+ }
-+
-+ npositive = 0;
-+ parent_bstart = dbstart(parent);
-+ if (type != S_IFDIR && dinfo->di_bstart == parent_bstart)
-+ goto out_dgen; /* success */
-+
-+#if 0
-+ nd.last_type = LAST_ROOT;
-+ nd.flags = LOOKUP_FOLLOW;
-+ nd.depth = 0;
-+ nd.mnt = mntget(??);
-+ nd.dentry = dget(parent);
-+#endif
-+ npositive = lkup_dentry(dentry, parent_bstart, type);
-+ //if (LktrCond) npositive = -1;
-+ if (npositive < 0)
-+ goto out;
-+
-+ out_dgen:
-+ au_update_digen(dentry);
-+ out:
-+ dput(parent);
-+ TraceErr(npositive);
-+ return npositive;
-+}
-+
-+static int h_d_revalidate(struct dentry *dentry, struct nameidata *nd,
-+ int do_udba)
-+{
-+ int err, plus, locked, unhashed, is_root, h_plus, is_nfs;
-+ struct nameidata fake_nd, *p;
-+ aufs_bindex_t bindex, btail, bstart, ibs, ibe;
-+ struct super_block *sb;
-+ struct inode *inode, *first, *h_inode, *h_cached_inode;
-+ umode_t mode, h_mode;
-+ struct dentry *h_dentry;
-+ int (*reval)(struct dentry *, struct nameidata *);
-+ struct qstr *name;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(inode && au_digen(dentry) != au_iigen(inode));
-+ //DbgDentry(dentry);
-+ //DbgInode(inode);
-+
-+ err = 0;
-+ sb = dentry->d_sb;
-+ plus = 0;
-+ mode = 0;
-+ first = NULL;
-+ ibs = ibe = -1;
-+ unhashed = d_unhashed(dentry);
-+ is_root = IS_ROOT(dentry);
-+ name = &dentry->d_name;
-+
-+ /*
-+ * Theoretically, REVAL test should be unnecessary in case of INOTIFY.
-+ * But inotify doesn't fire some necessary events,
-+ * IN_ATTRIB for atime/nlink/pageio
-+ * IN_DELETE for NFS dentry
-+ * Let's do REVAL test too.
-+ */
-+ if (do_udba && inode) {
-+ mode = (inode->i_mode & S_IFMT);
-+ plus = (inode->i_nlink > 0);
-+ first = au_h_iptr(inode);
-+ ibs = ibstart(inode);
-+ ibe = ibend(inode);
-+ }
-+
-+ btail = bstart = dbstart(dentry);
-+ if (inode && S_ISDIR(inode->i_mode))
-+ btail = dbtaildir(dentry);
-+ locked = 0;
-+ if (nd) {
-+ fake_nd = *nd;
-+#ifndef CONFIG_AUFS_FAKE_DM
-+ if (dentry != nd->dentry) {
-+ di_read_lock_parent(nd->dentry, 0);
-+ locked = 1;
-+ }
-+#endif
-+ }
-+ for (bindex = bstart; bindex <= btail; bindex++) {
-+ h_dentry = au_h_dptr_i(dentry, bindex);
-+ if (unlikely(!h_dentry))
-+ continue;
-+ if (unlikely(do_udba
-+ && !is_root
-+ && (unhashed != d_unhashed(h_dentry)
-+#if 1
-+ || name->len != h_dentry->d_name.len
-+ || memcmp(name->name, h_dentry->d_name.name,
-+ name->len)
-+#endif
-+ ))) {
-+ LKTRTrace("unhash 0x%x 0x%x, %.*s %.*s\n",
-+ unhashed, d_unhashed(h_dentry),
-+ DLNPair(dentry), DLNPair(h_dentry));
-+ goto err;
-+ }
-+
-+ reval = NULL;
-+ if (h_dentry->d_op)
-+ reval = h_dentry->d_op->d_revalidate;
-+ if (unlikely(reval)) {
-+ //LKTRLabel(hidden reval);
-+ p = fake_dm(&fake_nd, nd, sb, bindex);
-+ DEBUG_ON(IS_ERR(p));
-+ err = !reval(h_dentry, p);
-+ fake_dm_release(p);
-+ if (unlikely(err)) {
-+ //Dbg("here\n");
-+ goto err;
-+ }
-+ }
-+
-+ if (unlikely(!do_udba))
-+ continue;
-+
-+ /* UDBA tests */
-+ h_inode = h_dentry->d_inode;
-+ if (unlikely(!!inode != !!h_inode)) {
-+ //Dbg("here\n");
-+ goto err;
-+ }
-+
-+ h_plus = plus;
-+ h_mode = mode;
-+ h_cached_inode = h_inode;
-+ is_nfs = 0;
-+ if (h_inode) {
-+ h_mode = (h_inode->i_mode & S_IFMT);
-+ h_plus = (h_inode->i_nlink > 0);
-+ }
-+ if (inode && ibs <= bindex && bindex <= ibe) {
-+ h_cached_inode = au_h_iptr_i(inode, bindex);
-+ //is_nfs = au_is_nfs(h_cached_inode->i_sb);
-+ }
-+
-+ LKTRTrace("{%d, 0%o, %p}, h{%d, 0%o, %p}\n",
-+ plus, mode, h_cached_inode,
-+ h_plus, h_mode, h_inode);
-+ if (unlikely(plus != h_plus || mode != h_mode
-+ || (h_cached_inode != h_inode /* && !is_nfs */))) {
-+ //Dbg("here\n");
-+ goto err;
-+ }
-+ continue;
-+
-+ err:
-+ err = -EINVAL;
-+ break;
-+ }
-+#ifndef CONFIG_AUFS_FAKE_DM
-+ if (unlikely(locked))
-+ di_read_unlock(nd->dentry, 0);
-+#endif
-+
-+#if 0
-+ // some filesystem uses CURRENT_TIME_SEC instead of CURRENT_TIME.
-+ // NFS may stop IN_DELETE because of DCACHE_NFSFS_RENAMED.
-+#if 0
-+ && (!timespec_equal(&inode->i_ctime, &first->i_ctime)
-+ || !timespec_equal(&inode->i_atime, &first->i_atime))
-+#endif
-+ if (unlikely(!err && udba && first))
-+ au_cpup_attr_all(inode);
-+#endif
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int simple_reval_dpath(struct dentry *dentry, int sgen)
-+{
-+ int err;
-+ mode_t type;
-+ struct dentry *parent;
-+ struct inode *inode;
-+
-+ LKTRTrace("%.*s, sgen %d\n", DLNPair(dentry), sgen);
-+ SiMustAnyLock(dentry->d_sb);
-+ DiMustWriteLock(dentry);
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode);
-+
-+ if (au_digen(dentry) == sgen)
-+ return 0;
-+
-+ parent = dget_parent(dentry);
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ DEBUG_ON(au_digen(parent) != sgen);
-+#ifdef CONFIG_AUFS_DEBUG
-+ {
-+ struct dentry *d = parent;
-+ while (!IS_ROOT(d)) {
-+ DEBUG_ON(au_digen(d) != sgen);
-+ d = d->d_parent;
-+ }
-+ }
-+#endif
-+ type = (inode->i_mode & S_IFMT);
-+ /* returns a number of positive dentries */
-+ err = au_refresh_hdentry(dentry, type);
-+ if (err >= 0)
-+ err = au_refresh_hinode(inode, dentry);
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ dput(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_reval_dpath(struct dentry *dentry, int sgen)
-+{
-+ int err;
-+ struct dentry *d, *parent;
-+ struct inode *inode;
-+
-+ LKTRTrace("%.*s, sgen %d\n", DLNPair(dentry), sgen);
-+ DEBUG_ON(!dentry->d_inode);
-+ DiMustWriteLock(dentry);
-+
-+ if (!stosi(dentry->d_sb)->si_failed_refresh_dirs)
-+ return simple_reval_dpath(dentry, sgen);
-+
-+ /* slow loop, keep it simple and stupid */
-+ /* cf: cpup_dirs() */
-+ err = 0;
-+ while (au_digen(dentry) != sgen) {
-+ d = dentry;
-+ while (1) {
-+ parent = d->d_parent; // dget_parent()
-+ if (au_digen(parent) == sgen)
-+ break;
-+ d = parent;
-+ }
-+
-+ inode = d->d_inode;
-+ if (d != dentry) {
-+ //i_lock(inode);
-+ di_write_lock_child(d);
-+ }
-+
-+ /* someone might update our dentry while we were sleeping */
-+ if (au_digen(d) != sgen) {
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ /* returns a number of positive dentries */
-+ err = au_refresh_hdentry(d, inode->i_mode & S_IFMT);
-+ //err = -1;
-+ if (err >= 0)
-+ err = au_refresh_hinode(inode, d);
-+ //err = -1;
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ }
-+
-+ if (d != dentry) {
-+ di_write_unlock(d);
-+ //i_unlock(inode);
-+ }
-+ if (unlikely(err))
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * THIS IS A BOOLEAN FUNCTION: returns 1 if valid, 0 otherwise.
-+ * nfsd passes NULL as nameidata.
-+ */
-+static int aufs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
-+{
-+ int valid, sgen, err, do_udba;
-+ struct super_block *sb;
-+ struct inode *inode;
-+
-+ LKTRTrace("dentry %.*s\n", DLNPair(dentry));
-+ if (nd && nd->dentry)
-+ LKTRTrace("nd %.*s\n", DLNPair(nd->dentry));
-+ //dir case: DEBUG_ON(dentry->d_parent != nd->dentry);
-+ //remove failure case: DEBUG_ON(!IS_ROOT(dentry) && d_unhashed(dentry));
-+ DEBUG_ON(!dentry->d_fsdata);
-+ //DbgDentry(dentry);
-+
-+ err = -EINVAL;
-+ inode = dentry->d_inode;
-+ //DbgInode(inode);
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ sgen = au_sigen(sb);
-+ if (au_digen(dentry) == sgen)
-+ di_read_lock_child(dentry, !AUFS_I_RLOCK);
-+ else {
-+ DEBUG_ON(IS_ROOT(dentry));
-+#ifdef ForceInotify
-+ Dbg("UDBA or digen, %.*s\n", DLNPair(dentry));
-+#endif
-+ //i_lock(inode);
-+ di_write_lock_child(dentry);
-+ if (inode)
-+ err = au_reval_dpath(dentry, sgen);
-+ //err = -1;
-+ di_downgrade_lock(dentry, AUFS_I_RLOCK);
-+ //i_unlock(inode);
-+ if (unlikely(err))
-+ goto out;
-+ ii_read_unlock(inode);
-+ DEBUG_ON(au_iigen(inode) != sgen);
-+ }
-+
-+ if (inode) {
-+ if (au_iigen(inode) == sgen)
-+ ii_read_lock_child(inode);
-+ else {
-+ DEBUG_ON(IS_ROOT(dentry));
-+#ifdef ForceInotify
-+ Dbg("UDBA or survived, %.*s\n", DLNPair(dentry));
-+#endif
-+ ii_write_lock_child(inode);
-+ err = au_refresh_hinode(inode, dentry);
-+ ii_downgrade_lock(inode);
-+ if (unlikely(err))
-+ goto out;
-+ DEBUG_ON(au_iigen(inode) != sgen);
-+ }
-+ }
-+
-+#if 0 // fix it
-+ /* parent dir i_nlink is not updated in the case of setattr */
-+ if (S_ISDIR(inode->i_mode)) {
-+ i_lock(inode);
-+ ii_write_lock(inode);
-+ au_cpup_attr_nlink(inode);
-+ ii_write_unlock(inode);
-+ i_unlock(inode);
-+ }
-+#endif
-+
-+ err = -EINVAL;
-+ do_udba = !au_flag_test(sb, AuFlag_UDBA_NONE);
-+ if (do_udba && inode && ibstart(inode) >= 0
-+ && au_test_higen(inode, au_h_iptr(inode)))
-+ goto out;
-+ err = h_d_revalidate(dentry, nd, do_udba);
-+ //err = -1;
-+
-+ out:
-+ aufs_read_unlock(dentry, AUFS_I_RLOCK);
-+ TraceErr(err);
-+ valid = !err;
-+ //au_debug_on();
-+ if (!valid)
-+ LKTRTrace("%.*s invalid\n", DLNPair(dentry));
-+ //au_debug_off();
-+ return valid;
-+}
-+
-+static void aufs_d_release(struct dentry *dentry)
-+{
-+ struct aufs_dinfo *dinfo;
-+ aufs_bindex_t bend, bindex;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(!d_unhashed(dentry));
-+
-+ dinfo = dentry->d_fsdata;
-+ if (unlikely(!dinfo))
-+ return;
-+
-+ /* dentry may not be revalidated */
-+ bindex = dinfo->di_bstart;
-+ if (bindex >= 0) {
-+ struct aufs_hdentry *p;
-+ bend = dinfo->di_bend;
-+ DEBUG_ON(bend < bindex);
-+ p = dinfo->di_hdentry + bindex;
-+ while (bindex++ <= bend) {
-+ if (p->hd_dentry)
-+ hdput(p);
-+ p++;
-+ }
-+ }
-+ kfree(dinfo->di_hdentry);
-+ cache_free_dinfo(dinfo);
-+}
-+
-+#if 0
-+/* it may be called at remount time, too */
-+static void aufs_d_iput(struct dentry *dentry, struct inode *inode)
-+{
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, i%lu\n", DLNPair(dentry), inode->i_ino);
-+
-+ sb = dentry->d_sb;
-+#if 0
-+ si_read_lock(sb);
-+ if (unlikely(au_flag_test(sb, AuFlag_PLINK)
-+ && au_is_plinked(sb, inode))) {
-+ ii_write_lock(inode);
-+ au_update_brange(inode, 1);
-+ ii_write_unlock(inode);
-+ }
-+ si_read_unlock(sb);
-+#endif
-+ iput(inode);
-+}
-+#endif
-+
-+struct dentry_operations aufs_dop = {
-+ .d_revalidate = aufs_d_revalidate,
-+ .d_release = aufs_d_release
-+ //.d_iput = aufs_d_iput
-+};
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/dentry.h linux-2.6.22.1/fs/aufs/dentry.h
---- linux-2.6.22.1.oorig/fs/aufs/dentry.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/dentry.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,183 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dentry.h,v 1.25 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_DENTRY_H__
-+#define __AUFS_DENTRY_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+
-+struct aufs_hdentry {
-+ struct dentry *hd_dentry;
-+};
-+
-+struct aufs_dinfo {
-+ atomic_t di_generation;
-+
-+ struct aufs_rwsem di_rwsem;
-+ aufs_bindex_t di_bstart, di_bend, di_bwh, di_bdiropq;
-+ struct aufs_hdentry *di_hdentry;
-+};
-+
-+struct lkup_args {
-+ struct vfsmount *nfsmnt;
-+ int dlgt;
-+ //struct super_block *sb;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* dentry.c */
-+#if defined(CONFIG_AUFS_LHASH_PATCH) || defined(CONFIG_AUFS_DLGT)
-+struct dentry *lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup);
-+#else
-+static inline
-+struct dentry *lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup)
-+{
-+ return lookup_one_len(name, parent, len);
-+}
-+#endif
-+
-+extern struct dentry_operations aufs_dop;
-+struct dentry *sio_lkup_one(const char *name, struct dentry *parent, int len,
-+ struct lkup_args *lkup);
-+int lkup_dentry(struct dentry *dentry, aufs_bindex_t bstart, mode_t type);
-+int lkup_neg(struct dentry *dentry, aufs_bindex_t bindex);
-+int au_refresh_hdentry(struct dentry *dentry, mode_t type);
-+int au_reval_dpath(struct dentry *dentry, int sgen);
-+
-+/* dinfo.c */
-+int au_alloc_dinfo(struct dentry *dentry);
-+struct aufs_dinfo *dtodi(struct dentry *dentry);
-+
-+void di_read_lock(struct dentry *d, int flags, unsigned int lsc);
-+void di_read_unlock(struct dentry *d, int flags);
-+void di_downgrade_lock(struct dentry *d, int flags);
-+void di_write_lock(struct dentry *d, unsigned int lsc);
-+void di_write_unlock(struct dentry *d);
-+void di_write_lock2_child(struct dentry *d1, struct dentry *d2, int isdir);
-+void di_write_lock2_parent(struct dentry *d1, struct dentry *d2, int isdir);
-+void di_write_unlock2(struct dentry *d1, struct dentry *d2);
-+
-+aufs_bindex_t dbstart(struct dentry *dentry);
-+aufs_bindex_t dbend(struct dentry *dentry);
-+aufs_bindex_t dbwh(struct dentry *dentry);
-+aufs_bindex_t dbdiropq(struct dentry *dentry);
-+struct dentry *au_h_dptr_i(struct dentry *dentry, aufs_bindex_t bindex);
-+struct dentry *au_h_dptr(struct dentry *dentry);
-+
-+aufs_bindex_t dbtail(struct dentry *dentry);
-+aufs_bindex_t dbtaildir(struct dentry *dentry);
-+aufs_bindex_t dbtail_generic(struct dentry *dentry);
-+
-+void set_dbstart(struct dentry *dentry, aufs_bindex_t bindex);
-+void set_dbend(struct dentry *dentry, aufs_bindex_t bindex);
-+void set_dbwh(struct dentry *dentry, aufs_bindex_t bindex);
-+void set_dbdiropq(struct dentry *dentry, aufs_bindex_t bindex);
-+void hdput(struct aufs_hdentry *hdentry);
-+void set_h_dptr(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct dentry *h_dentry);
-+
-+void au_update_digen(struct dentry *dentry);
-+void au_update_dbstart(struct dentry *dentry);
-+int au_find_dbindex(struct dentry *dentry, struct dentry *h_dentry);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline int au_digen(struct dentry *d)
-+{
-+ return atomic_read(&dtodi(d)->di_generation);
-+}
-+
-+#ifdef CONFIG_AUFS_HINOTIFY
-+static inline void au_digen_dec(struct dentry *d)
-+{
-+ atomic_dec(&dtodi(d)->di_generation);
-+}
-+#endif /* CONFIG_AUFS_HINOTIFY */
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* lock subclass for dinfo */
-+enum {
-+ AuLsc_DI_CHILD, /* child first */
-+ AuLsc_DI_CHILD2, /* rename(2), link(2), and cpup at hinotify */
-+ AuLsc_DI_CHILD3, /* copyup dirs */
-+ AuLsc_DI_PARENT,
-+ AuLsc_DI_PARENT2,
-+ AuLsc_DI_PARENT3
-+};
-+
-+/*
-+ * di_read_lock_child, di_write_lock_child,
-+ * di_read_lock_child2, di_write_lock_child2,
-+ * di_read_lock_child3, di_write_lock_child3,
-+ * di_read_lock_parent, di_write_lock_parent,
-+ * di_read_lock_parent2, di_write_lock_parent2,
-+ * di_read_lock_parent3, di_write_lock_parent3,
-+ */
-+#define ReadLockFunc(name, lsc) \
-+static inline void di_read_lock_##name(struct dentry *d, int flags) \
-+{di_read_lock(d, flags, AuLsc_DI_##lsc);}
-+
-+#define WriteLockFunc(name, lsc) \
-+static inline void di_write_lock_##name(struct dentry *d) \
-+{di_write_lock(d, AuLsc_DI_##lsc);}
-+
-+#define RWLockFuncs(name, lsc) \
-+ ReadLockFunc(name, lsc); \
-+ WriteLockFunc(name, lsc)
-+
-+RWLockFuncs(child, CHILD);
-+RWLockFuncs(child2, CHILD2);
-+RWLockFuncs(child3, CHILD3);
-+RWLockFuncs(parent, PARENT);
-+RWLockFuncs(parent2, PARENT2);
-+RWLockFuncs(parent3, PARENT3);
-+
-+#undef ReadLockFunc
-+#undef WriteLockFunc
-+#undef RWLockFunc
-+
-+/* to debug easier, do not make them inlined functions */
-+#define DiMustReadLock(d) do { \
-+ SiMustAnyLock((d)->d_sb); \
-+ RwMustReadLock(&dtodi(d)->di_rwsem); \
-+} while (0)
-+
-+#define DiMustWriteLock(d) do { \
-+ SiMustAnyLock((d)->d_sb); \
-+ RwMustWriteLock(&dtodi(d)->di_rwsem); \
-+} while (0)
-+
-+#define DiMustAnyLock(d) do { \
-+ SiMustAnyLock((d)->d_sb); \
-+ RwMustAnyLock(&dtodi(d)->di_rwsem); \
-+} while (0)
-+
-+#define DiMustNoWaiters(d) RwMustNoWaiters(&dtodi(d)->di_rwsem)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_DENTRY_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/dinfo.c linux-2.6.22.1/fs/aufs/dinfo.c
---- linux-2.6.22.1.oorig/fs/aufs/dinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/dinfo.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,419 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dinfo.c,v 1.23 2007/05/07 03:43:36 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+int au_alloc_dinfo(struct dentry *dentry)
-+{
-+ struct aufs_dinfo *dinfo;
-+ struct super_block *sb;
-+ int nbr;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(dentry->d_fsdata);
-+
-+ dinfo = cache_alloc_dinfo();
-+ //if (LktrCond) {cache_free_dinfo(dinfo); dinfo = NULL;}
-+ if (dinfo) {
-+ sb = dentry->d_sb;
-+ nbr = sbend(sb) + 1;
-+ if (unlikely(!nbr))
-+ nbr++;
-+ dinfo->di_hdentry = kcalloc(nbr, sizeof(*dinfo->di_hdentry),
-+ GFP_KERNEL);
-+ //if (LktrCond)
-+ //{kfree(dinfo->di_hdentry); dinfo->di_hdentry = NULL;}
-+ if (dinfo->di_hdentry) {
-+ rw_init_wlock_nested(&dinfo->di_rwsem, AuLsc_DI_PARENT);
-+ dinfo->di_bstart = dinfo->di_bend = -1;
-+ dinfo->di_bwh = dinfo->di_bdiropq = -1;
-+ atomic_set(&dinfo->di_generation, au_sigen(sb));
-+
-+ dentry->d_fsdata = dinfo;
-+ dentry->d_op = &aufs_dop;
-+ return 0; /* success */
-+ }
-+ cache_free_dinfo(dinfo);
-+ }
-+ TraceErr(-ENOMEM);
-+ return -ENOMEM;
-+}
-+
-+struct aufs_dinfo *dtodi(struct dentry *dentry)
-+{
-+ struct aufs_dinfo *dinfo = dentry->d_fsdata;
-+ DEBUG_ON(!dinfo
-+ || !dinfo->di_hdentry
-+ /* || stosi(dentry->d_sb)->si_bend < dinfo->di_bend */
-+ || dinfo->di_bend < dinfo->di_bstart
-+ /* dbwh can be outside of this range */
-+ || (0 <= dinfo->di_bdiropq
-+ && (dinfo->di_bdiropq < dinfo->di_bstart
-+ /* || dinfo->di_bend < dinfo->di_bdiropq */))
-+ );
-+ return dinfo;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void do_ii_write_lock(struct inode *inode, unsigned int lsc)
-+{
-+ switch (lsc) {
-+ case AuLsc_DI_CHILD:
-+ ii_write_lock_child(inode);
-+ break;
-+ case AuLsc_DI_CHILD2:
-+ ii_write_lock_child2(inode);
-+ break;
-+ case AuLsc_DI_CHILD3:
-+ ii_write_lock_child3(inode);
-+ break;
-+ case AuLsc_DI_PARENT:
-+ ii_write_lock_parent(inode);
-+ break;
-+ case AuLsc_DI_PARENT2:
-+ ii_write_lock_parent2(inode);
-+ break;
-+ case AuLsc_DI_PARENT3:
-+ ii_write_lock_parent3(inode);
-+ break;
-+ default:
-+ BUG();
-+ }
-+}
-+
-+static void do_ii_read_lock(struct inode *inode, unsigned int lsc)
-+{
-+ switch (lsc) {
-+ case AuLsc_DI_CHILD:
-+ ii_read_lock_child(inode);
-+ break;
-+ case AuLsc_DI_CHILD2:
-+ ii_read_lock_child2(inode);
-+ break;
-+ case AuLsc_DI_CHILD3:
-+ ii_read_lock_child3(inode);
-+ break;
-+ case AuLsc_DI_PARENT:
-+ ii_read_lock_parent(inode);
-+ break;
-+ case AuLsc_DI_PARENT2:
-+ ii_read_lock_parent2(inode);
-+ break;
-+ case AuLsc_DI_PARENT3:
-+ ii_read_lock_parent3(inode);
-+ break;
-+ default:
-+ BUG();
-+ }
-+}
-+
-+void di_read_lock(struct dentry *d, int flags, unsigned int lsc)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ // todo: always nested?
-+ rw_read_lock_nested(&dtodi(d)->di_rwsem, lsc);
-+ if (d->d_inode) {
-+ if (flags & AUFS_I_WLOCK)
-+ do_ii_write_lock(d->d_inode, lsc);
-+ else if (flags & AUFS_I_RLOCK)
-+ do_ii_read_lock(d->d_inode, lsc);
-+ }
-+}
-+
-+void di_read_unlock(struct dentry *d, int flags)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ if (d->d_inode) {
-+ if (flags & AUFS_I_WLOCK)
-+ ii_write_unlock(d->d_inode);
-+ else if (flags & AUFS_I_RLOCK)
-+ ii_read_unlock(d->d_inode);
-+ }
-+ rw_read_unlock(&dtodi(d)->di_rwsem);
-+}
-+
-+void di_downgrade_lock(struct dentry *d, int flags)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ rw_dgrade_lock(&dtodi(d)->di_rwsem);
-+ if (d->d_inode && (flags & AUFS_I_RLOCK))
-+ ii_downgrade_lock(d->d_inode);
-+}
-+
-+void di_write_lock(struct dentry *d, unsigned int lsc)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ // todo: always nested?
-+ rw_write_lock_nested(&dtodi(d)->di_rwsem, lsc);
-+ if (d->d_inode)
-+ do_ii_write_lock(d->d_inode, lsc);
-+}
-+
-+void di_write_unlock(struct dentry *d)
-+{
-+ SiMustAnyLock(d->d_sb);
-+ if (d->d_inode)
-+ ii_write_unlock(d->d_inode);
-+ rw_write_unlock(&dtodi(d)->di_rwsem);
-+}
-+
-+void di_write_lock2_child(struct dentry *d1, struct dentry *d2, int isdir)
-+{
-+ struct dentry *d;
-+
-+ TraceEnter();
-+ DEBUG_ON(d1 == d2
-+ || d1->d_inode == d2->d_inode
-+ || d1->d_sb != d2->d_sb);
-+
-+ if (isdir)
-+ for (d = d1; d->d_parent != d; d = d->d_parent) // dget_parent()
-+ if (d->d_parent == d2) {
-+ di_write_lock_child(d1);
-+ di_write_lock_child2(d2);
-+ return;
-+ }
-+
-+ di_write_lock_child(d2);
-+ di_write_lock_child2(d1);
-+}
-+
-+void di_write_lock2_parent(struct dentry *d1, struct dentry *d2, int isdir)
-+{
-+ struct dentry *d;
-+
-+ TraceEnter();
-+ DEBUG_ON(d1 == d2
-+ || d1->d_inode == d2->d_inode
-+ || d1->d_sb != d2->d_sb);
-+
-+ if (isdir)
-+ for (d = d1; d->d_parent != d; d = d->d_parent) // dget_parent()
-+ if (d->d_parent == d2) {
-+ di_write_lock_parent(d1);
-+ di_write_lock_parent2(d2);
-+ return;
-+ }
-+
-+ di_write_lock_parent(d2);
-+ di_write_lock_parent2(d1);
-+}
-+
-+void di_write_unlock2(struct dentry *d1, struct dentry *d2)
-+{
-+ di_write_unlock(d1);
-+ if (d1->d_inode == d2->d_inode)
-+ rw_write_unlock(&dtodi(d2)->di_rwsem);
-+ else
-+ di_write_unlock(d2);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+aufs_bindex_t dbstart(struct dentry *dentry)
-+{
-+ DiMustAnyLock(dentry);
-+ return dtodi(dentry)->di_bstart;
-+}
-+
-+aufs_bindex_t dbend(struct dentry *dentry)
-+{
-+ DiMustAnyLock(dentry);
-+ return dtodi(dentry)->di_bend;
-+}
-+
-+aufs_bindex_t dbwh(struct dentry *dentry)
-+{
-+ DiMustAnyLock(dentry);
-+ return dtodi(dentry)->di_bwh;
-+}
-+
-+aufs_bindex_t dbdiropq(struct dentry *dentry)
-+{
-+ DiMustAnyLock(dentry);
-+ DEBUG_ON(dentry->d_inode
-+ && dentry->d_inode->i_mode
-+ && !S_ISDIR(dentry->d_inode->i_mode));
-+ return dtodi(dentry)->di_bdiropq;
-+}
-+
-+struct dentry *au_h_dptr_i(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ struct dentry *d;
-+
-+ DiMustAnyLock(dentry);
-+ if (dbstart(dentry) < 0 || bindex < dbstart(dentry))
-+ return NULL;
-+ DEBUG_ON(bindex < 0
-+ /* || bindex > sbend(dentry->d_sb) */);
-+ d = dtodi(dentry)->di_hdentry[0 + bindex].hd_dentry;
-+ DEBUG_ON(d && (atomic_read(&d->d_count) <= 0));
-+ return d;
-+}
-+
-+struct dentry *au_h_dptr(struct dentry *dentry)
-+{
-+ return au_h_dptr_i(dentry, dbstart(dentry));
-+}
-+
-+aufs_bindex_t dbtail(struct dentry *dentry)
-+{
-+ aufs_bindex_t bend, bwh;
-+
-+ bend = dbend(dentry);
-+ if (0 <= bend) {
-+ bwh = dbwh(dentry);
-+ //DEBUG_ON(bend < bwh);
-+ if (!bwh)
-+ return bwh;
-+ if (0 < bwh && bwh < bend)
-+ return bwh - 1;
-+ }
-+ return bend;
-+}
-+
-+aufs_bindex_t dbtaildir(struct dentry *dentry)
-+{
-+ aufs_bindex_t bend, bopq;
-+
-+ DEBUG_ON(dentry->d_inode
-+ && dentry->d_inode->i_mode
-+ && !S_ISDIR(dentry->d_inode->i_mode));
-+
-+ bend = dbtail(dentry);
-+ if (0 <= bend) {
-+ bopq = dbdiropq(dentry);
-+ DEBUG_ON(bend < bopq);
-+ if (0 <= bopq && bopq < bend)
-+ bend = bopq;
-+ }
-+ return bend;
-+}
-+
-+aufs_bindex_t dbtail_generic(struct dentry *dentry)
-+{
-+ struct inode *inode;
-+
-+ inode = dentry->d_inode;
-+ if (inode && S_ISDIR(inode->i_mode))
-+ return dbtaildir(dentry);
-+ else
-+ return dbtail(dentry);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+// hard/soft set
-+void set_dbstart(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(sbend(dentry->d_sb) < bindex);
-+ /* */
-+ dtodi(dentry)->di_bstart = bindex;
-+}
-+
-+void set_dbend(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(sbend(dentry->d_sb) < bindex
-+ || bindex < dbstart(dentry));
-+ dtodi(dentry)->di_bend = bindex;
-+}
-+
-+void set_dbwh(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(sbend(dentry->d_sb) < bindex);
-+ /* dbwh can be outside of bstart - bend range */
-+ dtodi(dentry)->di_bwh = bindex;
-+}
-+
-+void set_dbdiropq(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(sbend(dentry->d_sb) < bindex);
-+ DEBUG_ON((bindex != -1
-+ && (bindex < dbstart(dentry) || dbend(dentry) < bindex))
-+ || (dentry->d_inode
-+ && dentry->d_inode->i_mode
-+ && !S_ISDIR(dentry->d_inode->i_mode)));
-+ dtodi(dentry)->di_bdiropq = bindex;
-+}
-+
-+void hdput(struct aufs_hdentry *hd)
-+{
-+ dput(hd->hd_dentry);
-+}
-+
-+void set_h_dptr(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct dentry *h_dentry)
-+{
-+ struct aufs_hdentry *hd = dtodi(dentry)->di_hdentry + bindex;
-+ DiMustWriteLock(dentry);
-+ DEBUG_ON(bindex < dtodi(dentry)->di_bstart
-+ || bindex > dtodi(dentry)->di_bend
-+ || (h_dentry && atomic_read(&h_dentry->d_count) <= 0)
-+ || (h_dentry && hd->hd_dentry)
-+ );
-+ if (hd->hd_dentry)
-+ hdput(hd);
-+ hd->hd_dentry = h_dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void au_update_digen(struct dentry *dentry)
-+{
-+ //DiMustWriteLock(dentry);
-+ DEBUG_ON(!dentry->d_sb);
-+ atomic_set(&dtodi(dentry)->di_generation, au_sigen(dentry->d_sb));
-+}
-+
-+void au_update_dbstart(struct dentry *dentry)
-+{
-+ aufs_bindex_t bindex, bstart = dbstart(dentry), bend = dbend(dentry);
-+ struct dentry *hidden_dentry;
-+
-+ DiMustWriteLock(dentry);
-+ for (bindex = bstart; bindex <= bend; bindex++) {
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!hidden_dentry)
-+ continue;
-+ if (hidden_dentry->d_inode) {
-+ set_dbstart(dentry, bindex);
-+ return;
-+ }
-+ set_h_dptr(dentry, bindex, NULL);
-+ }
-+ //set_dbstart(dentry, -1);
-+ //set_dbend(dentry, -1);
-+}
-+
-+int au_find_dbindex(struct dentry *dentry, struct dentry *hidden_dentry)
-+{
-+ aufs_bindex_t bindex, bend;
-+
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); bindex <= bend; bindex++)
-+ if (au_h_dptr_i(dentry, bindex) == hidden_dentry)
-+ return bindex;
-+ return -1;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/dir.c linux-2.6.22.1/fs/aufs/dir.c
---- linux-2.6.22.1.oorig/fs/aufs/dir.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/dir.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,564 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dir.c,v 1.36 2007/05/14 03:38:52 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+static int reopen_dir(struct file *file)
-+{
-+ int err;
-+ struct dentry *dentry, *hidden_dentry;
-+ aufs_bindex_t bindex, btail, bstart;
-+ struct file *hidden_file;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(!S_ISDIR(dentry->d_inode->i_mode));
-+
-+ /* open all hidden dirs */
-+ bstart = dbstart(dentry);
-+#if 1
-+ for (bindex = fbstart(file); bindex < bstart; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+#endif
-+ set_fbstart(file, bstart);
-+ btail = dbtaildir(dentry);
-+#if 1
-+ for (bindex = fbend(file); btail < bindex; bindex--)
-+ set_h_fptr(file, bindex, NULL);
-+#endif
-+ set_fbend(file, btail);
-+ for (bindex = bstart; bindex <= btail; bindex++) {
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!hidden_dentry)
-+ continue;
-+ hidden_file = au_h_fptr_i(file, bindex);
-+ if (hidden_file) {
-+ DEBUG_ON(hidden_file->f_dentry != hidden_dentry);
-+ continue;
-+ }
-+
-+ hidden_file = hidden_open(dentry, bindex, file->f_flags);
-+ // unavailable
-+ //if (LktrCond) {fput(hidden_file);
-+ //br_put(stobr(dentry->d_sb, bindex));hidden_file=ERR_PTR(-1);}
-+ err = PTR_ERR(hidden_file);
-+ if (IS_ERR(hidden_file))
-+ goto out; // close all?
-+ //cpup_file_flags(hidden_file, file);
-+ set_h_fptr(file, bindex, hidden_file);
-+ }
-+ err = 0;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int do_open_dir(struct file *file, int flags)
-+{
-+ int err;
-+ aufs_bindex_t bindex, btail;
-+ struct dentry *dentry, *hidden_dentry;
-+ struct file *hidden_file;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, 0x%x\n", DLNPair(dentry), flags);
-+ DEBUG_ON(!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode));
-+
-+ err = 0;
-+ set_fvdir_cache(file, NULL);
-+ file->f_version = dentry->d_inode->i_version;
-+ bindex = dbstart(dentry);
-+ set_fbstart(file, bindex);
-+ btail = dbtaildir(dentry);
-+ set_fbend(file, btail);
-+ for (; !err && bindex <= btail; bindex++) {
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!hidden_dentry)
-+ continue;
-+
-+ hidden_file = hidden_open(dentry, bindex, flags);
-+ //if (LktrCond) {fput(hidden_file);
-+ //br_put(stobr(dentry->d_sb, bindex));hidden_file=ERR_PTR(-1);}
-+ if (!IS_ERR(hidden_file)) {
-+ set_h_fptr(file, bindex, hidden_file);
-+ continue;
-+ }
-+ err = PTR_ERR(hidden_file);
-+ }
-+ if (!err)
-+ return 0; /* success */
-+
-+ /* close all */
-+ for (bindex = fbstart(file); !err && bindex <= btail; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+ set_fbstart(file, -1);
-+ set_fbend(file, -1);
-+ return err;
-+}
-+
-+static int aufs_open_dir(struct inode *inode, struct file *file)
-+{
-+ return au_do_open(inode, file, do_open_dir);
-+}
-+
-+static int aufs_release_dir(struct inode *inode, struct file *file)
-+{
-+ struct aufs_vdir *vdir_cache;
-+ struct super_block *sb;
-+
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(file->f_dentry));
-+
-+ sb = file->f_dentry->d_sb;
-+ si_read_lock(sb);
-+ fi_write_lock(file);
-+ vdir_cache = fvdir_cache(file);
-+ if (vdir_cache)
-+ free_vdir(vdir_cache);
-+ fi_write_unlock(file);
-+ au_fin_finfo(file);
-+ si_read_unlock(sb);
-+ return 0;
-+}
-+
-+static int fsync_dir(struct dentry *dentry, int datasync)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct super_block *sb;
-+ aufs_bindex_t bend, bindex;
-+
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), datasync);
-+ DiMustAnyLock(dentry);
-+ sb = dentry->d_sb;
-+ SiMustAnyLock(sb);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+ IiMustAnyLock(inode);
-+
-+ err = 0;
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); !err && bindex <= bend; bindex++) {
-+ struct dentry *h_dentry;
-+ struct inode *h_inode;
-+ struct file_operations *fop;
-+
-+ if (test_ro(sb, bindex, inode))
-+ continue;
-+ h_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!h_dentry)
-+ continue;
-+ h_inode = h_dentry->d_inode;
-+ if (!h_inode)
-+ continue;
-+
-+ /* cf. fs/nsfd/vfs.c and fs/nfsd/nfs4recover.c */
-+ //hdir_lock(h_inode, inode, bindex);
-+ i_lock(h_inode);
-+ fop = (void*)h_inode->i_fop;
-+ err = filemap_fdatawrite(h_inode->i_mapping);
-+ if (!err && fop && fop->fsync)
-+ err = fop->fsync(NULL, h_dentry, datasync);
-+ if (!err)
-+ err = filemap_fdatawrite(h_inode->i_mapping);
-+ //hdir_unlock(h_inode, inode, bindex);
-+ i_unlock(h_inode);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * @file may be NULL
-+ */
-+static int aufs_fsync_dir(struct file *file, struct dentry *dentry,
-+ int datasync)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct file *hidden_file;
-+ struct super_block *sb;
-+ aufs_bindex_t bend, bindex;
-+
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), datasync);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+
-+ err = 0;
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ if (file) {
-+ err = au_reval_and_lock_finfo(file, reopen_dir, /*wlock*/1,
-+ /*locked*/1);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+ } else
-+ di_read_lock_child(dentry, !AUFS_I_WLOCK);
-+
-+ ii_write_lock_child(inode);
-+ if (file) {
-+ bend = fbend(file);
-+ for (bindex = fbstart(file); !err && bindex <= bend; bindex++) {
-+ hidden_file = au_h_fptr_i(file, bindex);
-+ if (!hidden_file || test_ro(sb, bindex, inode))
-+ continue;
-+
-+ err = -EINVAL;
-+ if (hidden_file->f_op && hidden_file->f_op->fsync) {
-+ // todo: try do_fsync() in fs/sync.c
-+#if 0
-+ DEBUG_ON(hidden_file->f_dentry->d_inode
-+ != au_h_iptr_i(inode, bindex));
-+ hdir_lock(hidden_file->f_dentry->d_inode, inode,
-+ bindex);
-+#else
-+ i_lock(hidden_file->f_dentry->d_inode);
-+#endif
-+ err = hidden_file->f_op->fsync
-+ (hidden_file, hidden_file->f_dentry,
-+ datasync);
-+ //err = -1;
-+#if 0
-+ hdir_unlock(hidden_file->f_dentry->d_inode,
-+ inode, bindex);
-+#else
-+ i_unlock(hidden_file->f_dentry->d_inode);
-+#endif
-+ }
-+ }
-+ } else
-+ err = fsync_dir(dentry, datasync);
-+ au_cpup_attr_timesizes(inode);
-+ ii_write_unlock(inode);
-+ if (file)
-+ fi_write_unlock(file);
-+ else
-+ di_read_unlock(dentry, !AUFS_I_WLOCK);
-+
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int aufs_readdir(struct file *file, void *dirent, filldir_t filldir)
-+{
-+ int err;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld\n", DLNPair(dentry), file->f_pos);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+
-+ au_nfsd_lockdep_off();
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, reopen_dir, /*wlock*/1,
-+ /*locked*/1);
-+ if (unlikely(err))
-+ goto out;
-+
-+ ii_write_lock_child(inode);
-+ err = au_init_vdir(file);
-+ if (unlikely(err)) {
-+ ii_write_unlock(inode);
-+ goto out_unlock;
-+ }
-+ //DbgVdir(fvdir_cache(file));// goto out_unlock;
-+
-+ /* nfsd filldir calls lookup_one_len(). */
-+ ii_downgrade_lock(inode);
-+ err = au_fill_de(file, dirent, filldir);
-+ //DbgVdir(fvdir_cache(file));// goto out_unlock;
-+
-+ inode->i_atime = au_h_iptr(inode)->i_atime;
-+ ii_read_unlock(inode);
-+
-+ out_unlock:
-+ fi_write_unlock(file);
-+ out:
-+ si_read_unlock(sb);
-+ au_nfsd_lockdep_on();
-+#if 0 // debug
-+ if (LktrCond)
-+ igrab(inode);
-+#endif
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct test_empty_arg {
-+ struct aufs_nhash *whlist;
-+ int whonly;
-+ aufs_bindex_t bindex;
-+ int err, called;
-+};
-+
-+static int test_empty_cb(void *__arg, const char *__name, int namelen,
-+ loff_t offset, filldir_ino_t ino, unsigned int d_type)
-+{
-+ struct test_empty_arg *arg = __arg;
-+ char *name = (void*)__name;
-+
-+ LKTRTrace("%.*s\n", namelen, name);
-+
-+ arg->err = 0;
-+ arg->called++;
-+ //smp_mb();
-+ if (name[0] == '.'
-+ && (namelen == 1 || (name[1] == '.' && namelen == 2)))
-+ return 0; /* success */
-+
-+ if (namelen <= AUFS_WH_PFX_LEN
-+ || memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) {
-+ if (arg->whonly && !test_known_wh(arg->whlist, name, namelen))
-+ arg->err = -ENOTEMPTY;
-+ goto out;
-+ }
-+
-+ name += AUFS_WH_PFX_LEN;
-+ namelen -= AUFS_WH_PFX_LEN;
-+ if (!test_known_wh(arg->whlist, name, namelen))
-+ arg->err = append_wh(arg->whlist, name, namelen, arg->bindex);
-+
-+ out:
-+ //smp_mb();
-+ TraceErr(arg->err);
-+ return arg->err;
-+}
-+
-+static int do_test_empty(struct dentry *dentry, struct test_empty_arg *arg)
-+{
-+ int err, dlgt;
-+ struct file *hidden_file;
-+
-+ LKTRTrace("%.*s, {%p, %d, %d}\n",
-+ DLNPair(dentry), arg->whlist, arg->whonly, arg->bindex);
-+
-+ hidden_file = hidden_open(dentry, arg->bindex,
-+ O_RDONLY | O_NONBLOCK | O_DIRECTORY
-+ | O_LARGEFILE);
-+ err = PTR_ERR(hidden_file);
-+ if (IS_ERR(hidden_file))
-+ goto out;
-+
-+ dlgt = need_dlgt(dentry->d_sb);
-+ //hidden_file->f_pos = 0;
-+ do {
-+ arg->err = 0;
-+ arg->called = 0;
-+ //smp_mb();
-+ err = vfsub_readdir(hidden_file, test_empty_cb, arg, dlgt);
-+ if (err >= 0)
-+ err = arg->err;
-+ } while (!err && arg->called);
-+ fput(hidden_file);
-+ sbr_put(dentry->d_sb, arg->bindex);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct do_test_empty_args {
-+ int *errp;
-+ struct dentry *dentry;
-+ struct test_empty_arg *arg;
-+};
-+
-+static void call_do_test_empty(void *args)
-+{
-+ struct do_test_empty_args *a = args;
-+ *a->errp = do_test_empty(a->dentry, a->arg);
-+}
-+
-+static int sio_test_empty(struct dentry *dentry, struct test_empty_arg *arg)
-+{
-+ int err;
-+ struct dentry *hidden_dentry;
-+ struct inode *hidden_inode;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ hidden_dentry = au_h_dptr_i(dentry, arg->bindex);
-+ DEBUG_ON(!hidden_dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode || !S_ISDIR(hidden_inode->i_mode));
-+
-+ hi_lock_child(hidden_inode);
-+ err = au_test_perm(hidden_inode, MAY_EXEC | MAY_READ,
-+ need_dlgt(dentry->d_sb));
-+ i_unlock(hidden_inode);
-+ if (!err)
-+ err = do_test_empty(dentry, arg);
-+ else {
-+ struct do_test_empty_args args = {
-+ .errp = &err,
-+ .dentry = dentry,
-+ .arg = arg
-+ };
-+ au_wkq_wait(call_do_test_empty, &args, /*dlgt*/0);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_test_empty_lower(struct dentry *dentry)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct test_empty_arg arg;
-+ struct aufs_nhash *whlist;
-+ aufs_bindex_t bindex, bstart, btail;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode || !S_ISDIR(inode->i_mode));
-+
-+ whlist = nhash_new(GFP_KERNEL);
-+ err = PTR_ERR(whlist);
-+ if (IS_ERR(whlist))
-+ goto out;
-+
-+ bstart = dbstart(dentry);
-+ arg.whlist = whlist;
-+ arg.whonly = 0;
-+ arg.bindex = bstart;
-+ err = do_test_empty(dentry, &arg);
-+ if (unlikely(err))
-+ goto out_whlist;
-+
-+ arg.whonly = 1;
-+ btail = dbtaildir(dentry);
-+ for (bindex = bstart + 1; !err && bindex <= btail; bindex++) {
-+ struct dentry *hidden_dentry;
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (hidden_dentry && hidden_dentry->d_inode) {
-+ DEBUG_ON(!S_ISDIR(hidden_dentry->d_inode->i_mode));
-+ arg.bindex = bindex;
-+ err = do_test_empty(dentry, &arg);
-+ }
-+ }
-+
-+ out_whlist:
-+ nhash_del(whlist);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int test_empty(struct dentry *dentry, struct aufs_nhash *whlist)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct test_empty_arg arg;
-+ aufs_bindex_t bindex, btail;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode || !S_ISDIR(inode->i_mode));
-+
-+ err = 0;
-+ arg.whlist = whlist;
-+ arg.whonly = 1;
-+ btail = dbtaildir(dentry);
-+ for (bindex = dbstart(dentry); !err && bindex <= btail; bindex++) {
-+ struct dentry *hidden_dentry;
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (hidden_dentry && hidden_dentry->d_inode) {
-+ DEBUG_ON(!S_ISDIR(hidden_dentry->d_inode->i_mode));
-+ arg.bindex = bindex;
-+ err = sio_test_empty(dentry, &arg);
-+ }
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void au_add_nlink(struct inode *dir, struct inode *h_dir)
-+{
-+ DEBUG_ON(!S_ISDIR(dir->i_mode) || !S_ISDIR(h_dir->i_mode));
-+ dir->i_nlink += h_dir->i_nlink - 2;
-+ if (unlikely(h_dir->i_nlink < 2))
-+ dir->i_nlink += 2;
-+}
-+
-+void au_sub_nlink(struct inode *dir, struct inode *h_dir)
-+{
-+ DEBUG_ON(!S_ISDIR(dir->i_mode) || !S_ISDIR(h_dir->i_mode));
-+ dir->i_nlink -= h_dir->i_nlink - 2;
-+ if (unlikely(h_dir->i_nlink < 2))
-+ dir->i_nlink -= 2;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if 0 // comment
-+struct file_operations {
-+ struct module *owner;
-+ loff_t (*llseek) (struct file *, loff_t, int);
-+ ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
-+ ssize_t (*aio_read) (struct kiocb *, char __user *, size_t, loff_t);
-+ ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
-+ ssize_t (*aio_write) (struct kiocb *, const char __user *, size_t, loff_t);
-+ int (*readdir) (struct file *, void *, filldir_t);
-+ unsigned int (*poll) (struct file *, struct poll_table_struct *);
-+ int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
-+ long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
-+ long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
-+ int (*mmap) (struct file *, struct vm_area_struct *);
-+ int (*open) (struct inode *, struct file *);
-+ int (*flush) (struct file *);
-+ int (*release) (struct inode *, struct file *);
-+ int (*fsync) (struct file *, struct dentry *, int datasync);
-+ int (*aio_fsync) (struct kiocb *, int datasync);
-+ int (*fasync) (int, struct file *, int);
-+ int (*lock) (struct file *, int, struct file_lock *);
-+ ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
-+ ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
-+ ssize_t (*sendfile) (struct file *, loff_t *, size_t, read_actor_t, void *);
-+ ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
-+ unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
-+ int (*check_flags)(int);
-+ int (*dir_notify)(struct file *file, unsigned long arg);
-+ int (*flock) (struct file *, int, struct file_lock *);
-+};
-+#endif
-+
-+struct file_operations aufs_dir_fop = {
-+ .read = generic_read_dir,
-+ .readdir = aufs_readdir,
-+ .open = aufs_open_dir,
-+ .release = aufs_release_dir,
-+ .flush = aufs_flush,
-+ .fsync = aufs_fsync_dir,
-+};
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/dir.h linux-2.6.22.1/fs/aufs/dir.h
---- linux-2.6.22.1.oorig/fs/aufs/dir.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/dir.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,125 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: dir.h,v 1.18 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_DIR_H__
-+#define __AUFS_DIR_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
-+#define filldir_ino_t u64
-+#else
-+#define filldir_ino_t ino_t
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* need to be faster and smaller */
-+
-+#define AUFS_DEBLK_SIZE 512 // todo: changable
-+#define AUFS_NHASH_SIZE 32 // todo: changable
-+#if AUFS_DEBLK_SIZE < NAME_MAX || PAGE_SIZE < AUFS_DEBLK_SIZE
-+#error invalid size AUFS_DEBLK_SIZE
-+#endif
-+
-+typedef char aufs_deblk_t[AUFS_DEBLK_SIZE];
-+
-+struct aufs_nhash {
-+ struct hlist_head heads[AUFS_NHASH_SIZE];
-+};
-+
-+struct aufs_destr {
-+ unsigned char len;
-+ char name[0];
-+} __attribute__ ((packed));
-+
-+struct aufs_dehstr {
-+ struct hlist_node hash;
-+ struct aufs_destr *str;
-+};
-+
-+struct aufs_de {
-+ ino_t de_ino;
-+ unsigned char de_type;
-+ //caution: packed
-+ struct aufs_destr de_str;
-+} __attribute__ ((packed));
-+
-+struct aufs_wh {
-+ struct hlist_node wh_hash;
-+ aufs_bindex_t wh_bindex;
-+ struct aufs_destr wh_str;
-+} __attribute__ ((packed));
-+
-+union aufs_deblk_p {
-+ unsigned char *p;
-+ aufs_deblk_t *deblk;
-+ struct aufs_de *de;
-+};
-+
-+struct aufs_vdir {
-+ aufs_deblk_t **vd_deblk;
-+ int vd_nblk;
-+ struct {
-+ int i;
-+ union aufs_deblk_p p;
-+ } vd_last;
-+
-+ unsigned long vd_version;
-+ unsigned long vd_jiffy;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* dir.c */
-+extern struct file_operations aufs_dir_fop;
-+int au_test_empty_lower(struct dentry *dentry);
-+int test_empty(struct dentry *dentry, struct aufs_nhash *whlist);
-+void au_add_nlink(struct inode *dir, struct inode *h_dir);
-+void au_sub_nlink(struct inode *dir, struct inode *h_dir);
-+
-+/* vdir.c */
-+struct aufs_nhash *nhash_new(gfp_t gfp);
-+void nhash_del(struct aufs_nhash *nhash);
-+void nhash_init(struct aufs_nhash *nhash);
-+void nhash_move(struct aufs_nhash *dst, struct aufs_nhash *src);
-+void nhash_fin(struct aufs_nhash *nhash);
-+int is_longer_wh(struct aufs_nhash *whlist, aufs_bindex_t btgt, int limit);
-+int test_known_wh(struct aufs_nhash *whlist, char *name, int namelen);
-+int append_wh(struct aufs_nhash *whlist, char *name, int namelen,
-+ aufs_bindex_t bindex);
-+void free_vdir(struct aufs_vdir *vdir);
-+int au_init_vdir(struct file *file);
-+int au_fill_de(struct file *file, void *dirent, filldir_t filldir);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+unsigned int au_name_hash(const unsigned char *name, unsigned int len)
-+{
-+ return (full_name_hash(name, len) % AUFS_NHASH_SIZE);
-+}
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_DIR_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/export.c linux-2.6.22.1/fs/aufs/export.c
---- linux-2.6.22.1.oorig/fs/aufs/export.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/export.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,585 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: export.c,v 1.7 2007/05/14 03:38:24 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+extern struct export_operations export_op_default;
-+#define CALL(ops, func) (((ops)->func) ? ((ops)->func) : export_op_default.func)
-+#define is_anon(d) ((d)->d_flags & DCACHE_DISCONNECTED)
-+
-+union conv {
-+#if BITS_PER_LONG == 32
-+ __u32 a[1];
-+#else
-+ __u32 a[2];
-+#endif
-+ ino_t ino;
-+};
-+
-+static ino_t decode_ino(__u32 *a)
-+{
-+ union conv u;
-+ u.a[0] = a[0];
-+#if BITS_PER_LONG == 64
-+ u.a[1] = a[1];
-+#endif
-+ return u.ino;
-+}
-+
-+static void encode_ino(__u32 *a, ino_t ino)
-+{
-+ union conv u;
-+ u.ino = ino;
-+ a[0] = u.a[0];
-+#if BITS_PER_LONG == 64
-+ a[1] = u.a[1];
-+#endif
-+}
-+
-+static void decode_br_id_sigen(__u32 a, aufs_bindex_t *br_id,
-+ aufs_bindex_t *sigen)
-+{
-+ BUILD_BUG_ON((sizeof(*br_id) + sizeof(*sigen)) > sizeof(a));
-+ *br_id = a >> 16;
-+ DEBUG_ON(*br_id < 0);
-+ *sigen = a;
-+ DEBUG_ON(*sigen < 0);
-+}
-+
-+static __u32 encode_br_id_sigen(aufs_bindex_t br_id, aufs_bindex_t sigen)
-+{
-+ DEBUG_ON(br_id < 0 || sigen < 0);
-+ return (br_id << 16) | sigen;
-+}
-+
-+/* NFS file handle */
-+enum {
-+ /* support 64bit inode number */
-+ /* but untested */
-+ Fh_br_id_sigen,
-+ Fh_ino1,
-+#if BITS_PER_LONG == 64
-+ Fh_ino2,
-+#endif
-+ Fh_dir_ino1,
-+#if BITS_PER_LONG == 64
-+ Fh_dir_ino2,
-+#endif
-+ Fh_h_ino1,
-+#if BITS_PER_LONG == 64
-+ Fh_h_ino2,
-+#endif
-+ Fh_h_igen,
-+ Fh_h_type,
-+ Fh_tail,
-+
-+ Fh_ino = Fh_ino1,
-+ Fh_dir_ino = Fh_dir_ino1,
-+ Fh_h_ino = Fh_h_ino1,
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static struct dentry *decode_by_ino(struct super_block *sb, ino_t ino,
-+ ino_t dir_ino)
-+{
-+ struct dentry *dentry;
-+ struct inode *inode;
-+
-+ LKTRTrace("i%lu, diri%lu\n", ino, dir_ino);
-+
-+ dentry = NULL;
-+ inode = ilookup(sb, ino);
-+ if (unlikely(!inode))
-+ goto out;
-+
-+ dentry = ERR_PTR(-ESTALE);
-+ if (unlikely(is_bad_inode(inode)))
-+ goto out_iput;
-+
-+ dentry = NULL;
-+ if (!S_ISDIR(inode->i_mode)) {
-+ struct dentry *d;
-+ spin_lock(&dcache_lock);
-+ list_for_each_entry(d, &inode->i_dentry, d_alias)
-+ if (!is_anon(d)
-+ && d->d_parent->d_inode->i_ino == dir_ino) {
-+ dentry = dget_locked(d);
-+ break;
-+ }
-+ spin_unlock(&dcache_lock);
-+ } else {
-+ dentry = d_find_alias(inode);
-+ if (dentry
-+ && !is_anon(dentry)
-+ && dentry->d_parent->d_inode->i_ino == dir_ino)
-+ goto out_iput; /* success */
-+
-+ dput(dentry);
-+ dentry = NULL;
-+ }
-+
-+ out_iput:
-+ iput(inode);
-+ out:
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct find_name_by_ino {
-+ int called, found;
-+ ino_t ino;
-+ char *name;
-+ int namelen;
-+};
-+
-+static int
-+find_name_by_ino(void *arg, const char *name, int namelen, loff_t offset,
-+ filldir_ino_t ino, unsigned int d_type)
-+{
-+ struct find_name_by_ino *a = arg;
-+
-+ a->called++;
-+ if (a->ino != ino)
-+ return 0;
-+
-+ memcpy(a->name, name, namelen);
-+ a->namelen = namelen;
-+ a->found = 1;
-+ return 1;
-+}
-+
-+static struct dentry *decode_by_dir_ino(struct super_block *sb, ino_t ino,
-+ ino_t dir_ino)
-+{
-+ struct dentry *dentry, *parent;
-+ struct inode *dir;
-+ struct find_name_by_ino arg;
-+ struct file *file;
-+ int err;
-+
-+ LKTRTrace("i%lu, diri%lu\n", ino, dir_ino);
-+
-+ dentry = NULL;
-+ dir = ilookup(sb, dir_ino);
-+ if (unlikely(!dir))
-+ goto out;
-+
-+ dentry = ERR_PTR(-ESTALE);
-+ if (unlikely(is_bad_inode(dir)))
-+ goto out_iput;
-+
-+ dentry = NULL;
-+ parent = d_find_alias(dir);
-+ if (parent) {
-+ if (unlikely(is_anon(parent))) {
-+ dput(parent);
-+ goto out_iput;
-+ }
-+ } else
-+ goto out_iput;
-+
-+ file = dentry_open(parent, NULL, au_dir_roflags);
-+ dentry = (void*)file;
-+ if (IS_ERR(file))
-+ goto out_iput;
-+
-+ dentry = ERR_PTR(-ENOMEM);
-+ arg.name = __getname();
-+ if (unlikely(!arg.name))
-+ goto out_fput;
-+ arg.ino = ino;
-+ arg.found = 0;
-+
-+ do {
-+ arg.called = 0;
-+ //smp_mb();
-+ err = vfsub_readdir(file, find_name_by_ino, &arg, /*dlgt*/0);
-+ } while (!err && !arg.found && arg.called);
-+ dentry = ERR_PTR(err);
-+ if (arg.found) {
-+ /* do not call lkup_one(), nor dlgt */
-+ i_lock(dir);
-+ dentry = lookup_one_len(arg.name, parent, arg.namelen);
-+ i_unlock(dir);
-+ TraceErrPtr(dentry);
-+ }
-+
-+ //out_putname:
-+ __putname(arg.name);
-+ out_fput:
-+ fput(file);
-+ out_iput:
-+ iput(dir);
-+ out:
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct append_name {
-+ int found, called, len;
-+ char *h_path;
-+ ino_t h_ino;
-+};
-+
-+static int append_name(void *arg, const char *name, int len, loff_t pos,
-+ filldir_ino_t ino, unsigned int d_type)
-+{
-+ struct append_name *a = arg;
-+ char *p;
-+
-+ a->called++;
-+ if (ino != a->h_ino)
-+ return 0;
-+
-+ DEBUG_ON(len == 1 && *name == '.');
-+ DEBUG_ON(len == 2 && name[0] == '.' && name[1] == '.');
-+ a->len = strlen(a->h_path);
-+ memmove(a->h_path - a->len - 1, a->h_path, a->len);
-+ a->h_path -= a->len + 1;
-+ p = a->h_path + a->len;
-+ *p++ = '/';
-+ memcpy(p, name, a->len);
-+ a->len += 1 + len;
-+ a->found++;
-+ return 1;
-+}
-+
-+static int h_acceptable(void *expv, struct dentry *dentry)
-+{
-+ return 1;
-+}
-+
-+static struct dentry*
-+decode_by_path(struct super_block *sb, aufs_bindex_t bindex, __u32 *fh,
-+ int fh_len, void *context)
-+{
-+ struct dentry *dentry, *h_parent, *root, *h_root;
-+ struct super_block *h_sb;
-+ char *path, *p;
-+ struct vfsmount *h_mnt;
-+ struct append_name arg;
-+ int len, err;
-+ struct file *h_file;
-+ struct nameidata nd;
-+ struct aufs_branch *br;
-+
-+ LKTRTrace("b%d\n", bindex);
-+ SiMustAnyLock(sb);
-+
-+ br = stobr(sb, bindex);
-+ //br_get(br);
-+ h_mnt = br->br_mnt;
-+ h_sb = h_mnt->mnt_sb;
-+ LKTRTrace("%s, h_decode_fh\n", au_sbtype(h_sb));
-+ h_parent = CALL(h_sb->s_export_op, decode_fh)
-+ (h_sb, fh + Fh_tail, fh_len - Fh_tail, fh[Fh_h_type],
-+ h_acceptable, /*context*/NULL);
-+ dentry = h_parent;
-+ if (unlikely(!h_parent || IS_ERR(h_parent))) {
-+ Warn1("%s decode_fh failed\n", au_sbtype(h_sb));
-+ goto out;
-+ }
-+ dentry = NULL;
-+ if (unlikely(is_anon(h_parent))) {
-+ Warn1("%s decode_fh returned a disconnected dentry\n",
-+ au_sbtype(h_sb));
-+ dput(h_parent);
-+ goto out;
-+ }
-+
-+ dentry = ERR_PTR(-ENOMEM);
-+ path = __getname();
-+ if (unlikely(!path)) {
-+ dput(h_parent);
-+ goto out;
-+ }
-+
-+ root = sb->s_root;
-+ di_read_lock_parent(root, !AUFS_I_RLOCK);
-+ h_root = au_h_dptr_i(root, bindex);
-+ di_read_unlock(root, !AUFS_I_RLOCK);
-+ arg.h_path = d_path(h_root, h_mnt, path, PATH_MAX);
-+ dentry = (void*)arg.h_path;
-+ if (unlikely(!arg.h_path || IS_ERR(arg.h_path)))
-+ goto out_putname;
-+ len = strlen(arg.h_path);
-+ arg.h_path = d_path(h_parent, h_mnt, path, PATH_MAX);
-+ dentry = (void*)arg.h_path;
-+ if (unlikely(!arg.h_path || IS_ERR(arg.h_path)))
-+ goto out_putname;
-+ LKTRTrace("%s\n", arg.h_path);
-+ if (len != 1)
-+ arg.h_path += len;
-+ LKTRTrace("%s\n", arg.h_path);
-+
-+ /* cf. fs/exportfs/expfs.c */
-+ h_file = dentry_open(h_parent, NULL, au_dir_roflags);
-+ dentry = (void*)h_file;
-+ if (IS_ERR(h_file))
-+ goto out_putname;
-+
-+ arg.found = 0;
-+ arg.h_ino = decode_ino(fh + Fh_h_ino);
-+ do {
-+ arg.called = 0;
-+ err = vfsub_readdir(h_file, append_name, &arg, /*dlgt*/0);
-+ } while (!err && !arg.found && arg.called);
-+ LKTRTrace("%s, %d\n", arg.h_path, arg.len);
-+
-+ p = d_path(root, stosi(sb)->si_mnt, path, PATH_MAX - arg.len - 2);
-+ dentry = (void*)p;
-+ if (unlikely(!p || IS_ERR(p)))
-+ goto out_fput;
-+ p[strlen(p)] = '/';
-+ LKTRTrace("%s\n", p);
-+
-+ err = path_lookup(p, LOOKUP_FOLLOW, &nd);
-+ dentry = ERR_PTR(err);
-+ if (!err) {
-+ dentry = dget(nd.dentry);
-+ if (unlikely(is_anon(dentry))) {
-+ dput(dentry);
-+ dentry = ERR_PTR(-ESTALE);
-+ }
-+ path_release(&nd);
-+ }
-+
-+ out_fput:
-+ fput(h_file);
-+ out_putname:
-+ __putname(path);
-+ out:
-+ //br_put(br);
-+ TraceErrPtr(dentry);
-+ return dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static struct dentry*
-+aufs_decode_fh(struct super_block *sb, __u32 *fh, int fh_len, int fh_type,
-+ int (*acceptable)(void *context, struct dentry *de),
-+ void *context)
-+{
-+ struct dentry *dentry;
-+ ino_t ino, dir_ino;
-+ aufs_bindex_t bindex, br_id, sigen_v;
-+ struct inode *inode, *h_inode;
-+
-+ //au_debug_on();
-+ LKTRTrace("%d, fh{i%u, br_id_sigen 0x%x, hi%u}\n",
-+ fh_type, fh[Fh_ino], fh[Fh_br_id_sigen], fh[Fh_h_ino]);
-+ DEBUG_ON(fh_len < Fh_tail);
-+
-+ si_read_lock(sb);
-+ lockdep_off();
-+
-+ /* branch id may be wrapped around */
-+ dentry = ERR_PTR(-ESTALE);
-+ decode_br_id_sigen(fh[Fh_br_id_sigen], &br_id, &sigen_v);
-+ bindex = find_brindex(sb, br_id);
-+ if (unlikely(bindex < 0 || au_sigen(sb) < sigen_v))
-+ goto out;
-+
-+ /* is this inode still cached? */
-+ ino = decode_ino(fh + Fh_ino);
-+ dir_ino = decode_ino(fh + Fh_dir_ino);
-+ dentry = decode_by_ino(sb, ino, dir_ino);
-+ if (IS_ERR(dentry))
-+ goto out;
-+ if (dentry)
-+ goto accept;
-+
-+ /* is the parent dir cached? */
-+ dentry = decode_by_dir_ino(sb, ino, dir_ino);
-+ if (IS_ERR(dentry))
-+ goto out;
-+ if (dentry)
-+ goto accept;
-+
-+ /* lookup path */
-+ dentry = decode_by_path(sb, bindex, fh, fh_len, context);
-+ if (IS_ERR(dentry))
-+ goto out;
-+ if (unlikely(!dentry))
-+ goto out_stale;
-+ if (unlikely(dentry->d_inode->i_ino != ino))
-+ goto out_dput;
-+
-+ accept:
-+ inode = dentry->d_inode;
-+ h_inode = NULL;
-+ ii_read_lock_child(inode);
-+ if (ibstart(inode) <= bindex && bindex <= ibend(inode))
-+ h_inode = au_h_iptr_i(inode, bindex);
-+ ii_read_unlock(inode);
-+ if (h_inode
-+ && h_inode->i_generation == fh[Fh_h_igen]
-+ && acceptable(context, dentry))
-+ goto out; /* success */
-+ out_dput:
-+ dput(dentry);
-+ out_stale:
-+ dentry = ERR_PTR(-ESTALE);
-+ out:
-+ lockdep_on();
-+ si_read_unlock(sb);
-+ TraceErrPtr(dentry);
-+ //au_debug_off();
-+ return dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int aufs_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len,
-+ int connectable)
-+{
-+ int err;
-+ struct super_block *sb, *h_sb;
-+ struct inode *inode, *h_inode, *dir;
-+ aufs_bindex_t bindex;
-+ union conv u;
-+ struct dentry *parent, *h_parent;
-+
-+ //au_debug_on();
-+ BUILD_BUG_ON(sizeof(u.ino) != sizeof(u.a));
-+ LKTRTrace("%.*s, max %d, conn %d\n",
-+ DLNPair(dentry), *max_len, connectable);
-+ DEBUG_ON(is_anon(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode);
-+ parent = dentry->d_parent;
-+ DEBUG_ON(is_anon(parent));
-+
-+ err = -ENOSPC;
-+ if (unlikely(*max_len <= Fh_tail)) {
-+ Warn1("NFSv2 client (max_len %d)?\n", *max_len);
-+ goto out;
-+ }
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ di_read_lock_child(dentry, AUFS_I_RLOCK);
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+#ifdef CONFIG_AUFS_DEBUG
-+ if (unlikely(!au_flag_test(sb, AuFlag_XINO)))
-+ Warn1("NFS-exporting requires xino\n");
-+#if 0
-+ if (unlikely(au_flag_test(sb, AuFlag_UDBA_INOTIFY)))
-+ Warn1("udba=inotify is not recommended when exporting\n");
-+#endif
-+#endif
-+
-+ err = -EPERM;
-+ bindex = ibstart(inode);
-+ h_sb = sbr_sb(sb, bindex);
-+ if (unlikely(!h_sb->s_export_op)) {
-+ Err1("%s branch is not exportable\n", au_sbtype(h_sb));
-+ goto out_unlock;
-+ }
-+
-+#if 0 //def CONFIG_AUFS_ROBR
-+ if (unlikely(SB_AUFS(h_sb))) {
-+ Err1("aufs branch is not supported\n");
-+ goto out_unlock;
-+ }
-+#endif
-+
-+ /* doesn't support pseudo-link */
-+ if (unlikely(bindex < dbstart(dentry)
-+ || dbend(dentry) < bindex
-+ || !au_h_dptr_i(dentry, bindex))) {
-+ Err("%.*s/%.*s, b%d, pseudo-link?\n",
-+ DLNPair(dentry->d_parent), DLNPair(dentry), bindex);
-+ goto out_unlock;
-+ }
-+
-+ fh[Fh_br_id_sigen] = encode_br_id_sigen(sbr_id(sb, bindex),
-+ au_sigen(sb));
-+ encode_ino(fh + Fh_ino, inode->i_ino);
-+ dir = parent->d_inode;
-+ encode_ino(fh + Fh_dir_ino, dir->i_ino);
-+ h_inode = au_h_iptr(inode);
-+ encode_ino(fh + Fh_h_ino, h_inode->i_ino);
-+ fh[Fh_h_igen] = h_inode->i_generation;
-+
-+ /* it should be set at exporting time */
-+ if (unlikely(!h_sb->s_export_op->find_exported_dentry)) {
-+ Warn("set default find_exported_dentry for %s\n",
-+ au_sbtype(h_sb));
-+ h_sb->s_export_op->find_exported_dentry = find_exported_dentry;
-+ }
-+
-+ *max_len -= Fh_tail;
-+ //LKTRTrace("Fh_tail %d, max_len %d\n", Fh_tail, *max_len);
-+ h_parent = au_h_dptr_i(parent, bindex);
-+ DEBUG_ON(is_anon(h_parent));
-+ err = fh[Fh_h_type] = CALL(h_sb->s_export_op, encode_fh)
-+ (h_parent, fh + Fh_tail, max_len, connectable);
-+ *max_len += Fh_tail;
-+ if (err != 255)
-+ err = 2; //??
-+ else
-+ Warn1("%s encode_fh failed\n", au_sbtype(h_sb));
-+
-+ out_unlock:
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ aufs_read_unlock(dentry, AUFS_I_RLOCK);
-+ out:
-+ TraceErr(err);
-+ //au_debug_off();
-+ if (unlikely(err < 0))
-+ err = 255;
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if 0
-+struct export_operations {
-+ struct dentry *(*decode_fh)(struct super_block *sb, __u32 *fh, int fh_len, int fh_type,
-+ int (*acceptable)(void *context, struct dentry *de),
-+ void *context);
-+ int (*encode_fh)(struct dentry *de, __u32 *fh, int *max_len,
-+ int connectable);
-+
-+ /* the following are only called from the filesystem itself */
-+ int (*get_name)(struct dentry *parent, char *name,
-+ struct dentry *child);
-+ struct dentry * (*get_parent)(struct dentry *child);
-+ struct dentry * (*get_dentry)(struct super_block *sb, void *inump);
-+
-+ /* This is set by the exporting module to a standard helper */
-+ struct dentry * (*find_exported_dentry)(
-+ struct super_block *sb, void *obj, void *parent,
-+ int (*acceptable)(void *context, struct dentry *de),
-+ void *context);
-+};
-+#endif
-+
-+struct export_operations aufs_export_op = {
-+ .decode_fh = aufs_decode_fh,
-+ .encode_fh = aufs_encode_fh
-+};
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/f_op.c linux-2.6.22.1/fs/aufs/f_op.c
---- linux-2.6.22.1.oorig/fs/aufs/f_op.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/f_op.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,684 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: f_op.c,v 1.27 2007/05/14 03:38:24 sfjro Exp $ */
-+
-+#include <linux/fsnotify.h>
-+#include <linux/pagemap.h>
-+#include <linux/poll.h>
-+#include <linux/security.h>
-+#include <linux/version.h>
-+#include "aufs.h"
-+
-+/* common function to regular file and dir */
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+#define FlushArgs hidden_file, id
-+int aufs_flush(struct file *file, fl_owner_t id)
-+#else
-+#define FlushArgs hidden_file
-+int aufs_flush(struct file *file)
-+#endif
-+{
-+ int err;
-+ struct dentry *dentry;
-+ aufs_bindex_t bindex, bend;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+
-+ // aufs_read_lock_file()
-+ si_read_lock(dentry->d_sb);
-+ fi_read_lock(file);
-+ di_read_lock_child(dentry, !AUFS_I_RLOCK);
-+
-+ err = 0;
-+ bend = fbend(file);
-+ for (bindex = fbstart(file); !err && bindex <= bend; bindex++) {
-+ struct file *hidden_file;
-+ hidden_file = au_h_fptr_i(file, bindex);
-+ if (hidden_file && hidden_file->f_op
-+ && hidden_file->f_op->flush)
-+ err = hidden_file->f_op->flush(FlushArgs);
-+ }
-+
-+ di_read_unlock(dentry, !AUFS_I_RLOCK);
-+ fi_read_unlock(file);
-+ si_read_unlock(dentry->d_sb);
-+ TraceErr(err);
-+ return err;
-+}
-+#undef FlushArgs
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int do_open_nondir(struct file *file, int flags)
-+{
-+ int err;
-+ aufs_bindex_t bindex;
-+ struct super_block *sb;
-+ struct file *hidden_file;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct aufs_finfo *finfo;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, flags 0%o\n", DLNPair(dentry), flags);
-+ FiMustWriteLock(file);
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode || S_ISDIR(inode->i_mode));
-+
-+ err = 0;
-+ finfo = ftofi(file);
-+ finfo->fi_h_vm_ops = NULL;
-+ sb = dentry->d_sb;
-+ bindex = dbstart(dentry);
-+ DEBUG_ON(!au_h_dptr(dentry)->d_inode);
-+ /* O_TRUNC is processed already */
-+ BUG_ON(test_ro(sb, bindex, inode) && (flags & O_TRUNC));
-+
-+ hidden_file = hidden_open(dentry, bindex, flags);
-+ //if (LktrCond) {fput(hidden_file); br_put(stobr(dentry->d_sb, bindex));
-+ //hidden_file = ERR_PTR(-1);}
-+ if (!IS_ERR(hidden_file)) {
-+ set_fbstart(file, bindex);
-+ set_fbend(file, bindex);
-+ set_h_fptr(file, bindex, hidden_file);
-+ return 0; /* success */
-+ }
-+ err = PTR_ERR(hidden_file);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int aufs_open_nondir(struct inode *inode, struct file *file)
-+{
-+ return au_do_open(inode, file, do_open_nondir);
-+}
-+
-+static int aufs_release_nondir(struct inode *inode, struct file *file)
-+{
-+ struct super_block *sb = file->f_dentry->d_sb;
-+
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(file->f_dentry));
-+
-+ si_read_lock(sb);
-+ au_fin_finfo(file);
-+ si_read_unlock(sb);
-+ return 0;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static ssize_t aufs_read(struct file *file, char __user *buf, size_t count,
-+ loff_t *ppos)
-+{
-+ ssize_t err;
-+ struct dentry *dentry;
-+ struct file *hidden_file;
-+ struct super_block *sb;
-+ struct inode *h_inode;
-+ int dlgt;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(dentry), (unsigned long)count, *ppos);
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/0,
-+ /*locked*/0);
-+ //if (LktrCond) {fi_read_unlock(file); err = -1;}
-+ if (unlikely(err))
-+ goto out;
-+
-+ /* support LSM and notify */
-+ dlgt = need_dlgt(sb);
-+ hidden_file = au_h_fptr(file);
-+ h_inode = hidden_file->f_dentry->d_inode;
-+ if (!au_flag_test(sb, AuFlag_UDBA_INOTIFY))
-+ err = vfsub_read_u(hidden_file, buf, count, ppos, dlgt);
-+ else {
-+ struct inode *dir = dentry->d_parent->d_inode,
-+ *h_dir = hidden_file->f_dentry->d_parent->d_inode;
-+ aufs_bindex_t bstart = fbstart(file);
-+ hdir_lock(h_dir, dir, bstart);
-+ err = vfsub_read_u(hidden_file, buf, count, ppos, dlgt);
-+ hdir_unlock(h_dir, dir, bstart);
-+ }
-+ memcpy(&file->f_ra, &hidden_file->f_ra, sizeof(file->f_ra)); //??
-+ dentry->d_inode->i_atime = hidden_file->f_dentry->d_inode->i_atime;
-+
-+ fi_read_unlock(file);
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static ssize_t aufs_write(struct file *file, const char __user *__buf,
-+ size_t count, loff_t *ppos)
-+{
-+ ssize_t err;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct super_block *sb;
-+ struct file *hidden_file;
-+ char __user *buf = (char __user*)__buf;
-+ struct inode *h_inode;
-+ int dlgt;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(dentry), (unsigned long)count, *ppos);
-+
-+ inode = dentry->d_inode;
-+ i_lock(inode);
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/1,
-+ /*locked*/1);
-+ //if (LktrCond) {fi_write_unlock(file); err = -1;}
-+ if (unlikely(err))
-+ goto out;
-+ err = au_ready_to_write(file, -1);
-+ //if (LktrCond) err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+
-+ /* support LSM and notify */
-+ dlgt = need_dlgt(sb);
-+ hidden_file = au_h_fptr(file);
-+ h_inode = hidden_file->f_dentry->d_inode;
-+ if (!au_flag_test(sb, AuFlag_UDBA_INOTIFY))
-+ err = vfsub_write_u(hidden_file, buf, count, ppos, dlgt);
-+ else {
-+ struct inode *dir = dentry->d_parent->d_inode,
-+ *h_dir = hidden_file->f_dentry->d_parent->d_inode;
-+ aufs_bindex_t bstart = fbstart(file);
-+ hdir_lock(h_dir, dir, bstart);
-+ err = vfsub_write_u(hidden_file, buf, count, ppos, dlgt);
-+ hdir_unlock(h_dir, dir, bstart);
-+ }
-+ ii_write_lock_child(inode);
-+ au_cpup_attr_timesizes(inode);
-+ ii_write_unlock(inode);
-+
-+ out_unlock:
-+ fi_write_unlock(file);
-+ out:
-+ si_read_unlock(sb);
-+ i_unlock(inode);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if 0 //def CONFIG_AUFS_ROBR
-+struct lvma {
-+ struct list_head list;
-+ struct vm_area_struct *vma;
-+};
-+
-+static struct file *safe_file(struct vm_area_struct *vma)
-+{
-+ struct file *file = vma->vm_file;
-+ struct super_block *sb = file->f_dentry->d_sb;
-+ struct lvma *lvma, *entry;
-+ struct aufs_sbinfo *sbinfo;
-+ int found, warn;
-+
-+ TraceEnter();
-+ DEBUG_ON(!SB_AUFS(sb));
-+
-+ warn = 0;
-+ found = 0;
-+ sbinfo = stosi(sb);
-+ spin_lock(&sbinfo->si_lvma_lock);
-+ list_for_each_entry(entry, &sbinfo->si_lvma, list) {
-+ found = (entry->vma == vma);
-+ if (unlikely(found))
-+ break;
-+ }
-+ if (!found) {
-+ lvma = kmalloc(sizeof(*lvma), GFP_ATOMIC);
-+ if (lvma) {
-+ lvma->vma = vma;
-+ list_add(&lvma->list, &sbinfo->si_lvma);
-+ } else {
-+ warn = 1;
-+ file = NULL;
-+ }
-+ } else
-+ file = NULL;
-+ spin_unlock(&sbinfo->si_lvma_lock);
-+
-+ if (unlikely(warn))
-+ Warn1("no memory for lvma\n");
-+ return file;
-+}
-+
-+static void reset_file(struct vm_area_struct *vma, struct file *file)
-+{
-+ struct super_block *sb = file->f_dentry->d_sb;
-+ struct lvma *entry, *found;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+ DEBUG_ON(!SB_AUFS(sb));
-+
-+ vma->vm_file = file;
-+
-+ found = NULL;
-+ sbinfo = stosi(sb);
-+ spin_lock(&sbinfo->si_lvma_lock);
-+ list_for_each_entry(entry, &sbinfo->si_lvma, list)
-+ if (entry->vma == vma){
-+ found = entry;
-+ break;
-+ }
-+ DEBUG_ON(!found);
-+ list_del(&found->list);
-+ spin_unlock(&sbinfo->si_lvma_lock);
-+ kfree(found);
-+}
-+
-+#else
-+
-+static struct file *safe_file(struct vm_area_struct *vma)
-+{
-+ struct file *file;
-+
-+ file = vma->vm_file;
-+ if (file->private_data && au_is_aufs(file->f_dentry->d_sb))
-+ return file;
-+ return NULL;
-+}
-+
-+static void reset_file(struct vm_area_struct *vma, struct file *file)
-+{
-+ vma->vm_file = file;
-+ smp_mb();
-+}
-+#endif /* CONFIG_AUFS_ROBR */
-+
-+static struct page *aufs_nopage(struct vm_area_struct *vma, unsigned long addr,
-+ int *type)
-+{
-+ struct page *page;
-+ struct dentry *dentry;
-+ struct file *file, *hidden_file;
-+ struct inode *inode;
-+ static DECLARE_WAIT_QUEUE_HEAD(wq);
-+ struct aufs_finfo *finfo;
-+
-+ TraceEnter();
-+ DEBUG_ON(!vma || !vma->vm_file);
-+ wait_event(wq, (file = safe_file(vma)));
-+ DEBUG_ON(!au_is_aufs(file->f_dentry->d_sb));
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, addr %lx\n", DLNPair(dentry), addr);
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!S_ISREG(inode->i_mode));
-+
-+ // do not revalidate, nor lock
-+ finfo = ftofi(file);
-+ hidden_file = finfo->fi_hfile[0 + finfo->fi_bstart].hf_file;
-+ DEBUG_ON(!hidden_file || !au_is_mmapped(file));
-+ vma->vm_file = hidden_file;
-+ //smp_mb();
-+ page = finfo->fi_h_vm_ops->nopage(vma, addr, type);
-+ reset_file(vma, file);
-+#if 0 //def CONFIG_SMP
-+ //wake_up_nr(&wq, online_cpu - 1);
-+ wake_up_all(&wq);
-+#else
-+ wake_up(&wq);
-+#endif
-+ if (!IS_ERR(page)) {
-+ //page->mapping = file->f_mapping;
-+ //get_page(page);
-+ //file->f_mapping = hidden_file->f_mapping;
-+ //touch_atime(NULL, dentry);
-+ //inode->i_atime = hidden_file->f_dentry->d_inode->i_atime;
-+ }
-+ TraceErrPtr(page);
-+ return page;
-+}
-+
-+static int aufs_populate(struct vm_area_struct *vma, unsigned long addr,
-+ unsigned long len, pgprot_t prot, unsigned long pgoff,
-+ int nonblock)
-+{
-+ Err("please report me this application\n");
-+ BUG();
-+ return ftofi(vma->vm_file)->fi_h_vm_ops->populate
-+ (vma, addr, len, prot, pgoff, nonblock);
-+}
-+
-+static struct vm_operations_struct aufs_vm_ops = {
-+ //.open = aufs_vmaopen,
-+ //.close = aufs_vmaclose,
-+ .nopage = aufs_nopage,
-+ .populate = aufs_populate,
-+ //page_mkwrite(struct vm_area_struct *vma, struct page *page)
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int aufs_mmap(struct file *file, struct vm_area_struct *vma)
-+{
-+ int err, wlock, mmapped;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+ struct file *h_file;
-+ struct vm_operations_struct *vm_ops;
-+ unsigned long flags;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, %lx, len %lu\n",
-+ DLNPair(dentry), vma->vm_start, vma->vm_end - vma->vm_start);
-+ DEBUG_ON(!S_ISREG(dentry->d_inode->i_mode));
-+ DEBUG_ON(down_write_trylock(&vma->vm_mm->mmap_sem));
-+
-+ mmapped = au_is_mmapped(file);
-+ wlock = 0;
-+ if (file->f_mode & FMODE_WRITE) {
-+ flags = VM_SHARED | VM_WRITE;
-+ wlock = ((flags & vma->vm_flags) == flags);
-+ }
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir,
-+ wlock | !mmapped, /*locked*/0);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+
-+ if (wlock) {
-+ err = au_ready_to_write(file, -1);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+ }
-+
-+ h_file = au_h_fptr(file);
-+ vm_ops = ftofi(file)->fi_h_vm_ops;
-+ if (unlikely(!mmapped)) {
-+ // nfs uses some locks
-+ lockdep_off();
-+ err = h_file->f_op->mmap(h_file, vma);
-+ lockdep_on();
-+ if (unlikely(err))
-+ goto out_unlock;
-+ vm_ops = vma->vm_ops;
-+ DEBUG_ON(!vm_ops);
-+ err = do_munmap(current->mm, vma->vm_start,
-+ vma->vm_end - vma->vm_start);
-+ if (unlikely(err)) {
-+ IOErr("failed internal unmapping %.*s, %d\n",
-+ DLNPair(h_file->f_dentry), err);
-+ err = -EIO;
-+ goto out_unlock;
-+ }
-+ }
-+ DEBUG_ON(!vm_ops);
-+
-+ err = generic_file_mmap(file, vma);
-+ if (!err) {
-+ file_accessed(h_file);
-+ dentry->d_inode->i_atime = h_file->f_dentry->d_inode->i_atime;
-+ vma->vm_ops = &aufs_vm_ops;
-+ if (unlikely(!mmapped))
-+ ftofi(file)->fi_h_vm_ops = vm_ops;
-+ }
-+
-+ out_unlock:
-+ if (!wlock && mmapped)
-+ fi_read_unlock(file);
-+ else
-+ fi_write_unlock(file);
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+// todo: try do_sendfile() in fs/read_write.c
-+static ssize_t aufs_sendfile(struct file *file, loff_t *ppos,
-+ size_t count, read_actor_t actor, void *target)
-+{
-+ ssize_t err;
-+ struct file *h_file;
-+ const char c = current->comm[4];
-+ /* true if a kernel thread named 'loop[0-9].*' accesses a file */
-+ const int loopback = (current->mm == NULL
-+ && '0' <= c && c <= '9'
-+ && strncmp(current->comm, "loop", 4) == 0);
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld, cnt %lu, loopback %d\n",
-+ DLNPair(dentry), *ppos, (unsigned long)count, loopback);
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/0,
-+ /*locked*/0);
-+ if (unlikely(err))
-+ goto out;
-+
-+ err = -EINVAL;
-+ h_file = au_h_fptr(file);
-+ if (h_file->f_op && h_file->f_op->sendfile) {
-+ if (/* unlikely */(loopback)) {
-+ file->f_mapping = h_file->f_mapping;
-+ smp_mb(); //??
-+ }
-+ // nfs uses some locks
-+ lockdep_off();
-+ err = h_file->f_op->sendfile
-+ (h_file, ppos, count, actor, target);
-+ lockdep_on();
-+ dentry->d_inode->i_atime = h_file->f_dentry->d_inode->i_atime;
-+ }
-+ fi_read_unlock(file);
-+
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* copied from linux/fs/select.h, must match */
-+#define DEFAULT_POLLMASK (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)
-+
-+static unsigned int aufs_poll(struct file *file, poll_table *wait)
-+{
-+ unsigned int mask;
-+ struct file *hidden_file;
-+ int err;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, wait %p\n", DLNPair(dentry), wait);
-+ DEBUG_ON(S_ISDIR(dentry->d_inode->i_mode));
-+
-+ /* We should pretend an error happend. */
-+ mask = POLLERR /* | POLLIN | POLLOUT */;
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/0,
-+ /*locked*/0);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+
-+ /* it is not an error of hidden_file has no operation */
-+ mask = DEFAULT_POLLMASK;
-+ hidden_file = au_h_fptr(file);
-+ if (hidden_file->f_op && hidden_file->f_op->poll)
-+ mask = hidden_file->f_op->poll(hidden_file, wait);
-+ fi_read_unlock(file);
-+
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr((int)mask);
-+ return mask;
-+}
-+
-+static int aufs_fsync_nondir(struct file *file, struct dentry *dentry,
-+ int datasync)
-+{
-+ int err, my_lock;
-+ struct inode *inode;
-+ struct file *hidden_file;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), datasync);
-+ inode = dentry->d_inode;
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
-+ IMustLock(inode);
-+ my_lock = 0;
-+#else
-+ /* before 2.6.17,
-+ * msync(2) calls me without locking i_sem/i_mutex, but fsync(2).
-+ */
-+ my_lock = !i_trylock(inode);
-+#endif
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = 0; //-EBADF; // posix?
-+ if (unlikely(!(file->f_mode & FMODE_WRITE)))
-+ goto out;
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/1,
-+ /*locked*/1);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+ err = au_ready_to_write(file, -1);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+
-+ err = -EINVAL;
-+ hidden_file = au_h_fptr(file);
-+ if (hidden_file->f_op && hidden_file->f_op->fsync) {
-+ // todo: apparmor thread?
-+ //file->f_mapping->host->i_mutex
-+ ii_write_lock_child(inode);
-+ hi_lock_child(hidden_file->f_dentry->d_inode);
-+ err = hidden_file->f_op->fsync
-+ (hidden_file, hidden_file->f_dentry, datasync);
-+ //err = -1;
-+ au_cpup_attr_timesizes(inode);
-+ i_unlock(hidden_file->f_dentry->d_inode);
-+ ii_write_unlock(inode);
-+ }
-+
-+ out_unlock:
-+ fi_write_unlock(file);
-+ out:
-+ if (unlikely(my_lock))
-+ i_unlock(inode);
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int aufs_fasync(int fd, struct file *file, int flag)
-+{
-+ int err;
-+ struct file *hidden_file;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), flag);
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ err = au_reval_and_lock_finfo(file, au_reopen_nondir, /*wlock*/0,
-+ /*locked*/0);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+
-+ hidden_file = au_h_fptr(file);
-+ if (hidden_file->f_op && hidden_file->f_op->fasync)
-+ err = hidden_file->f_op->fasync(fd, hidden_file, flag);
-+ fi_read_unlock(file);
-+
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if 0 // comment
-+struct file_operations {
-+ struct module *owner;
-+ loff_t (*llseek) (struct file *, loff_t, int);
-+ ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
-+ ssize_t (*aio_read) (struct kiocb *, char __user *, size_t, loff_t);
-+ ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
-+ ssize_t (*aio_write) (struct kiocb *, const char __user *, size_t, loff_t);
-+ int (*readdir) (struct file *, void *, filldir_t);
-+ unsigned int (*poll) (struct file *, struct poll_table_struct *);
-+ int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
-+ long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
-+ long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
-+ int (*mmap) (struct file *, struct vm_area_struct *);
-+ int (*open) (struct inode *, struct file *);
-+ int (*flush) (struct file *);
-+ int (*release) (struct inode *, struct file *);
-+ int (*fsync) (struct file *, struct dentry *, int datasync);
-+ int (*aio_fsync) (struct kiocb *, int datasync);
-+ int (*fasync) (int, struct file *, int);
-+ int (*lock) (struct file *, int, struct file_lock *);
-+ ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
-+ ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
-+ ssize_t (*sendfile) (struct file *, loff_t *, size_t, read_actor_t, void *);
-+ ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
-+ unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
-+ int (*check_flags)(int);
-+ int (*dir_notify)(struct file *file, unsigned long arg);
-+ int (*flock) (struct file *, int, struct file_lock *);
-+};
-+#endif
-+
-+struct file_operations aufs_file_fop = {
-+ .read = aufs_read,
-+ .write = aufs_write,
-+ .poll = aufs_poll,
-+ .mmap = aufs_mmap,
-+ .open = aufs_open_nondir,
-+ .flush = aufs_flush,
-+ .release = aufs_release_nondir,
-+ .fsync = aufs_fsync_nondir,
-+ .fasync = aufs_fasync,
-+ .sendfile = aufs_sendfile,
-+};
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/file.c linux-2.6.22.1/fs/aufs/file.c
---- linux-2.6.22.1.oorig/fs/aufs/file.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/file.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,832 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: file.c,v 1.42 2007/05/14 03:39:09 sfjro Exp $ */
-+
-+//#include <linux/fsnotify.h>
-+#include <linux/pagemap.h>
-+//#include <linux/poll.h>
-+//#include <linux/security.h>
-+#include "aufs.h"
-+
-+/* drop flags for writing */
-+unsigned int au_file_roflags(unsigned int flags)
-+{
-+ flags &= ~(O_WRONLY | O_RDWR | O_APPEND | O_CREAT | O_TRUNC);
-+ flags |= O_RDONLY | O_NOATIME;
-+ return flags;
-+}
-+
-+/* common functions to regular file and dir */
-+struct file *hidden_open(struct dentry *dentry, aufs_bindex_t bindex, int flags)
-+{
-+ struct dentry *hidden_dentry;
-+ struct inode *hidden_inode;
-+ struct super_block *sb;
-+ struct vfsmount *hidden_mnt;
-+ struct file *hidden_file;
-+ struct aufs_branch *br;
-+ loff_t old_size;
-+ int udba;
-+
-+ LKTRTrace("%.*s, b%d, flags 0%o\n", DLNPair(dentry), bindex, flags);
-+ DEBUG_ON(!dentry);
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ DEBUG_ON(!hidden_dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+
-+ sb = dentry->d_sb;
-+ udba = au_flag_test(sb, AuFlag_UDBA_INOTIFY);
-+ if (unlikely(udba)) {
-+ // test here?
-+ }
-+
-+ br = stobr(sb, bindex);
-+ br_get(br);
-+ /* drop flags for writing */
-+ if (test_ro(sb, bindex, dentry->d_inode))
-+ flags = au_file_roflags(flags);
-+ flags &= ~O_CREAT;
-+ spin_lock(&hidden_inode->i_lock);
-+ old_size = i_size_read(hidden_inode);
-+ spin_unlock(&hidden_inode->i_lock);
-+
-+ //DbgSleep(3);
-+
-+ dget(hidden_dentry);
-+ hidden_mnt = mntget(br->br_mnt);
-+ hidden_file = dentry_open(hidden_dentry, hidden_mnt, flags);
-+ //if (LktrCond) {fput(hidden_file); hidden_file = ERR_PTR(-1);}
-+
-+ if (!IS_ERR(hidden_file)) {
-+#if 0 // remove this
-+ if (/* old_size && */ (flags & O_TRUNC)) {
-+ au_direval_dec(dentry);
-+ if (!IS_ROOT(dentry))
-+ au_direval_dec(dentry->d_parent);
-+ }
-+#endif
-+ return hidden_file;
-+ }
-+
-+ br_put(br);
-+ TraceErrPtr(hidden_file);
-+ return hidden_file;
-+}
-+
-+static int do_coo(struct dentry *dentry, aufs_bindex_t bstart)
-+{
-+ int err;
-+ struct dentry *parent, *h_parent, *h_dentry;
-+ aufs_bindex_t bcpup;
-+ struct inode *h_dir, *h_inode, *dir;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(IS_ROOT(dentry));
-+ DiMustWriteLock(dentry);
-+
-+ parent = dentry->d_parent; // dget_parent()
-+ di_write_lock_parent(parent);
-+ bcpup = err = find_rw_parent_br(dentry, bstart);
-+ //bcpup = err = find_rw_br(sb, bstart);
-+ if (unlikely(err < 0)) {
-+ err = 0; // stop copyup, it is not an error
-+ goto out;
-+ }
-+ err = 0;
-+
-+ h_parent = au_h_dptr_i(parent, bcpup);
-+ if (!h_parent) {
-+ err = cpup_dirs(dentry, bcpup, NULL);
-+ if (unlikely(err))
-+ goto out;
-+ h_parent = au_h_dptr_i(parent, bcpup);
-+ }
-+
-+ h_dir = h_parent->d_inode;
-+ h_dentry = au_h_dptr_i(dentry, bstart);
-+ h_inode = h_dentry->d_inode;
-+ dir = parent->d_inode;
-+ hdir_lock(h_dir, dir, bcpup);
-+ hi_lock_child(h_inode);
-+ DEBUG_ON(au_h_dptr_i(dentry, bcpup));
-+ err = sio_cpup_simple(dentry, bcpup, -1,
-+ au_flags_cpup(CPUP_DTIME, parent));
-+ TraceErr(err);
-+ i_unlock(h_inode);
-+ hdir_unlock(h_dir, dir, bcpup);
-+
-+ out:
-+ di_write_unlock(parent);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_do_open(struct inode *inode, struct file *file,
-+ int (*open)(struct file *file, int flags))
-+{
-+ int err, coo;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+ aufs_bindex_t bstart;
-+ struct inode *h_dir, *dir;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(dentry));
-+
-+ sb = dentry->d_sb;
-+ si_read_lock(sb);
-+ coo = 0;
-+#if 0
-+ switch (au_flag_test_coo(sb)) {
-+ case AuFlag_COO_LEAF:
-+ coo = !S_ISDIR(inode->i_mode);
-+ break;
-+ case AuFlag_COO_ALL:
-+ coo = 1;
-+ break;
-+ }
-+#endif
-+ err = au_init_finfo(file);
-+ //if (LktrCond) {fi_write_unlock(file); fin_finfo(file); err = -1;}
-+ if (unlikely(err))
-+ goto out;
-+
-+ if (!coo) {
-+ di_read_lock_child(dentry, AUFS_I_RLOCK);
-+ bstart = dbstart(dentry);
-+ } else {
-+ di_write_lock_child(dentry);
-+ bstart = dbstart(dentry);
-+ if (test_ro(sb, bstart, dentry->d_inode)) {
-+ err = do_coo(dentry, bstart);
-+ if (err) {
-+ di_write_unlock(dentry);
-+ goto out_finfo;
-+ }
-+ bstart = dbstart(dentry);
-+ }
-+ di_downgrade_lock(dentry, AUFS_I_RLOCK);
-+ }
-+
-+ // todo: remove this extra locks
-+ dir = dentry->d_parent->d_inode;
-+ if (!IS_ROOT(dentry))
-+ ii_read_lock_parent(dir);
-+ h_dir = au_h_iptr_i(dir, bstart);
-+ hdir_lock(h_dir, dir, bstart);
-+ err = open(file, file->f_flags);
-+ //if (LktrCond) err = -1;
-+ hdir_unlock(h_dir, dir, bstart);
-+ if (!IS_ROOT(dentry))
-+ ii_read_unlock(dir);
-+ di_read_unlock(dentry, AUFS_I_RLOCK);
-+
-+ out_finfo:
-+ fi_write_unlock(file);
-+ if (unlikely(err))
-+ au_fin_finfo(file);
-+ //DbgFile(file);
-+ out:
-+ si_read_unlock(sb);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_reopen_nondir(struct file *file)
-+{
-+ int err;
-+ struct dentry *dentry;
-+ aufs_bindex_t bstart, bindex, bend;
-+ struct file *hidden_file, *h_file_tmp;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(S_ISDIR(dentry->d_inode->i_mode)
-+ || !au_h_dptr(dentry)->d_inode);
-+ bstart = dbstart(dentry);
-+
-+ h_file_tmp = NULL;
-+ if (fbstart(file) == bstart) {
-+ hidden_file = au_h_fptr(file);
-+ if (file->f_mode == hidden_file->f_mode)
-+ return 0; /* success */
-+ h_file_tmp = hidden_file;
-+ get_file(h_file_tmp);
-+ set_h_fptr(file, bstart, NULL);
-+ }
-+ DEBUG_ON(fbstart(file) < bstart
-+ || ftofi(file)->fi_hfile[0 + bstart].hf_file);
-+
-+ hidden_file = hidden_open(dentry, bstart, file->f_flags & ~O_TRUNC);
-+ //if (LktrCond) {fput(hidden_file); br_put(stobr(dentry->d_sb, bstart));
-+ //hidden_file = ERR_PTR(-1);}
-+ err = PTR_ERR(hidden_file);
-+ if (IS_ERR(hidden_file))
-+ goto out; // close all?
-+ err = 0;
-+ //cpup_file_flags(hidden_file, file);
-+ set_fbstart(file, bstart);
-+ set_h_fptr(file, bstart, hidden_file);
-+ memcpy(&hidden_file->f_ra, &file->f_ra, sizeof(file->f_ra)); //??
-+
-+ /* close lower files */
-+ bend = fbend(file);
-+ for (bindex = bstart + 1; bindex <= bend; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+ set_fbend(file, bstart);
-+
-+ out:
-+ if (h_file_tmp)
-+ fput(h_file_tmp);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * copyup the deleted file for writing.
-+ */
-+static int cpup_wh_file(struct file *file, aufs_bindex_t bdst, loff_t len)
-+{
-+ int err;
-+ struct dentry *dentry, *parent, *hidden_parent, *tmp_dentry;
-+ struct dentry *hidden_dentry_bstart, *hidden_dentry_bdst;
-+ struct inode *hidden_dir;
-+ aufs_bindex_t bstart;
-+ struct aufs_dinfo *dinfo;
-+ struct dtime dt;
-+ struct lkup_args lkup;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, bdst %d, len %Lu\n", DLNPair(dentry), bdst, len);
-+ DEBUG_ON(S_ISDIR(dentry->d_inode->i_mode)
-+ || !(file->f_mode & FMODE_WRITE));
-+ DiMustWriteLock(dentry);
-+ parent = dentry->d_parent;
-+ IiMustAnyLock(parent->d_inode);
-+ hidden_parent = au_h_dptr_i(parent, bdst);
-+ DEBUG_ON(!hidden_parent);
-+ hidden_dir = hidden_parent->d_inode;
-+ DEBUG_ON(!hidden_dir);
-+ IMustLock(hidden_dir);
-+
-+ sb = parent->d_sb;
-+ lkup.nfsmnt = au_nfsmnt(sb, bdst);
-+ lkup.dlgt = need_dlgt(sb);
-+ tmp_dentry = lkup_whtmp(hidden_parent, &dentry->d_name, &lkup);
-+ //if (LktrCond) {dput(tmp_dentry); tmp_dentry = ERR_PTR(-1);}
-+ err = PTR_ERR(tmp_dentry);
-+ if (IS_ERR(tmp_dentry))
-+ goto out;
-+
-+ dtime_store(&dt, parent, hidden_parent);
-+ dinfo = dtodi(dentry);
-+ bstart = dinfo->di_bstart;
-+ hidden_dentry_bdst = dinfo->di_hdentry[0 + bdst].hd_dentry;
-+ hidden_dentry_bstart = dinfo->di_hdentry[0 + bstart].hd_dentry;
-+ dinfo->di_bstart = bdst;
-+ dinfo->di_hdentry[0 + bdst].hd_dentry = tmp_dentry;
-+ dinfo->di_hdentry[0 + bstart].hd_dentry = au_h_fptr(file)->f_dentry;
-+ err = cpup_single(dentry, bdst, bstart, len,
-+ au_flags_cpup(!CPUP_DTIME, parent));
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ err = au_reopen_nondir(file);
-+ //err = -1;
-+ dinfo->di_hdentry[0 + bstart].hd_dentry = hidden_dentry_bstart;
-+ dinfo->di_hdentry[0 + bdst].hd_dentry = hidden_dentry_bdst;
-+ dinfo->di_bstart = bstart;
-+ if (unlikely(err))
-+ goto out_tmp;
-+
-+ DEBUG_ON(!d_unhashed(dentry));
-+ err = vfsub_unlink(hidden_dir, tmp_dentry, lkup.dlgt);
-+ //if (LktrCond) err = -1;
-+ if (unlikely(err)) {
-+ IOErr("failed remove copied-up tmp file %.*s(%d)\n",
-+ DLNPair(tmp_dentry), err);
-+ err = -EIO;
-+ }
-+ dtime_revert(&dt, !CPUP_LOCKED_GHDIR);
-+
-+ out_tmp:
-+ dput(tmp_dentry);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct cpup_wh_file_args {
-+ int *errp;
-+ struct file *file;
-+ aufs_bindex_t bdst;
-+ loff_t len;
-+};
-+
-+static void call_cpup_wh_file(void *args)
-+{
-+ struct cpup_wh_file_args *a = args;
-+ *a->errp = cpup_wh_file(a->file, a->bdst, a->len);
-+}
-+
-+/*
-+ * prepare the @file for writing.
-+ */
-+int au_ready_to_write(struct file *file, loff_t len)
-+{
-+ int err;
-+ struct dentry *dentry, *parent, *hidden_dentry, *hidden_parent;
-+ struct inode *hidden_inode, *hidden_dir, *inode, *dir;
-+ struct super_block *sb;
-+ aufs_bindex_t bstart, bcpup;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, len %Ld\n", DLNPair(dentry), len);
-+ FiMustWriteLock(file);
-+
-+ sb = dentry->d_sb;
-+ bstart = fbstart(file);
-+ DEBUG_ON(ftobr(file, bstart) != stobr(sb, bstart));
-+
-+ inode = dentry->d_inode;
-+ ii_read_lock_child(inode);
-+ LKTRTrace("rdonly %d, bstart %d\n", test_ro(sb, bstart, inode), bstart);
-+ err = test_ro(sb, bstart, inode);
-+ ii_read_unlock(inode);
-+ if (!err && (au_h_fptr(file)->f_mode & FMODE_WRITE))
-+ return 0;
-+
-+ /* need to cpup */
-+ parent = dentry->d_parent; // dget_parent()
-+ di_write_lock_child(dentry);
-+ di_write_lock_parent(parent);
-+ bcpup = err = find_rw_parent_br(dentry, bstart);
-+ //bcpup = err = find_rw_br(sb, bstart);
-+ if (unlikely(err < 0))
-+ goto out_unlock;
-+ err = 0;
-+
-+ hidden_parent = au_h_dptr_i(parent, bcpup);
-+ if (!hidden_parent) {
-+ err = cpup_dirs(dentry, bcpup, NULL);
-+ //if (LktrCond) err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+ hidden_parent = au_h_dptr_i(parent, bcpup);
-+ }
-+
-+ hidden_dir = hidden_parent->d_inode;
-+ hidden_dentry = au_h_fptr(file)->f_dentry;
-+ hidden_inode = hidden_dentry->d_inode;
-+ dir = parent->d_inode;
-+ hdir_lock(hidden_dir, dir, bcpup);
-+ hi_lock_child(hidden_inode);
-+ if (d_unhashed(dentry) || d_unhashed(hidden_dentry)
-+ /* || !hidden_inode->i_nlink */) {
-+ if (!au_test_perm(hidden_dir, MAY_EXEC | MAY_WRITE,
-+ need_dlgt(sb)))
-+ err = cpup_wh_file(file, bcpup, len);
-+ else {
-+ struct cpup_wh_file_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .bdst = bcpup,
-+ .len = len
-+ };
-+ au_wkq_wait(call_cpup_wh_file, &args, /*dlgt*/0);
-+ }
-+ //if (LktrCond) err = -1;
-+ TraceErr(err);
-+ } else {
-+ if (!au_h_dptr_i(dentry, bcpup))
-+ err = sio_cpup_simple(dentry, bcpup, len,
-+ au_flags_cpup(CPUP_DTIME,
-+ parent));
-+ //if (LktrCond) err = -1;
-+ TraceErr(err);
-+ if (!err)
-+ err = au_reopen_nondir(file);
-+ //if (LktrCond) err = -1;
-+ TraceErr(err);
-+ }
-+ i_unlock(hidden_inode);
-+ hdir_unlock(hidden_dir, dir, bcpup);
-+
-+ out_unlock:
-+ di_write_unlock(parent);
-+ di_write_unlock(dentry);
-+// out:
-+ TraceErr(err);
-+ return err;
-+
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * after branch manipulating, refresh the file.
-+ */
-+static int refresh_file(struct file *file, int (*reopen)(struct file *file))
-+{
-+ int err, new_sz;
-+ struct dentry *dentry;
-+ aufs_bindex_t bend, bindex, bstart, brid;
-+ struct aufs_hfile *p;
-+ struct aufs_finfo *finfo;
-+ struct super_block *sb;
-+ struct inode *inode;
-+ struct file *hidden_file;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ FiMustWriteLock(file);
-+ DiMustReadLock(dentry);
-+ inode = dentry->d_inode;
-+ IiMustReadLock(inode);
-+ //au_debug_on();
-+ //DbgDentry(dentry);
-+ //DbgFile(file);
-+ //au_debug_off();
-+
-+ err = -ENOMEM;
-+ sb = dentry->d_sb;
-+ finfo = ftofi(file);
-+ bstart = finfo->fi_bstart;
-+ bend = finfo->fi_bstart;
-+ new_sz = sizeof(*finfo->fi_hfile) * (sbend(sb) + 1);
-+ p = au_kzrealloc(finfo->fi_hfile, sizeof(*p) * (finfo->fi_bend + 1),
-+ new_sz, GFP_KERNEL);
-+ //p = NULL;
-+ if (unlikely(!p))
-+ goto out;
-+ finfo->fi_hfile = p;
-+ hidden_file = p[0 + bstart].hf_file;
-+
-+ p = finfo->fi_hfile + finfo->fi_bstart;
-+ brid = p->hf_br->br_id;
-+ bend = finfo->fi_bend;
-+ for (bindex = finfo->fi_bstart; bindex <= bend; bindex++, p++) {
-+ struct aufs_hfile tmp, *q;
-+ aufs_bindex_t new_bindex;
-+
-+ if (!p->hf_file)
-+ continue;
-+ new_bindex = find_bindex(sb, p->hf_br);
-+ if (new_bindex == bindex)
-+ continue;
-+ if (new_bindex < 0) { // test here
-+ set_h_fptr(file, bindex, NULL);
-+ continue;
-+ }
-+
-+ /* swap two hidden inode, and loop again */
-+ q = finfo->fi_hfile + new_bindex;
-+ tmp = *q;
-+ *q = *p;
-+ *p = tmp;
-+ if (tmp.hf_file) {
-+ bindex--;
-+ p--;
-+ }
-+ }
-+ {
-+ aufs_bindex_t s = finfo->fi_bstart, e = finfo->fi_bend;
-+ finfo->fi_bstart = 0;
-+ finfo->fi_bend = sbend(sb);
-+ //au_debug_on();
-+ //DbgFile(file);
-+ //au_debug_off();
-+ finfo->fi_bstart = s;
-+ finfo->fi_bend = e;
-+ }
-+
-+ p = finfo->fi_hfile;
-+ if (!au_is_mmapped(file) && !d_unhashed(dentry)) {
-+ bend = sbend(sb);
-+ for (finfo->fi_bstart = 0; finfo->fi_bstart <= bend;
-+ finfo->fi_bstart++, p++)
-+ if (p->hf_file) {
-+ if (p->hf_file->f_dentry
-+ && p->hf_file->f_dentry->d_inode)
-+ break;
-+ else
-+ au_hfput(p);
-+ }
-+ } else {
-+ bend = find_brindex(sb, brid);
-+ //LKTRTrace("%d\n", bend);
-+ for (finfo->fi_bstart = 0; finfo->fi_bstart < bend;
-+ finfo->fi_bstart++, p++)
-+ if (p->hf_file)
-+ au_hfput(p);
-+ //LKTRTrace("%d\n", finfo->fi_bstart);
-+ bend = sbend(sb);
-+ }
-+
-+ p = finfo->fi_hfile + bend;
-+ for (finfo->fi_bend = bend; finfo->fi_bend >= finfo->fi_bstart;
-+ finfo->fi_bend--, p--)
-+ if (p->hf_file) {
-+ if (p->hf_file->f_dentry
-+ && p->hf_file->f_dentry->d_inode)
-+ break;
-+ else
-+ au_hfput(p);
-+ }
-+ //Dbg("%d, %d\n", finfo->fi_bstart, finfo->fi_bend);
-+ DEBUG_ON(finfo->fi_bend < finfo->fi_bstart);
-+ //DbgFile(file);
-+ //DbgDentry(file->f_dentry);
-+
-+ err = 0;
-+#if 0 // todo:
-+ if (!au_h_dptr(dentry)->d_inode) {
-+ au_update_figen(file);
-+ goto out; /* success */
-+ }
-+#endif
-+
-+ if (unlikely(au_is_mmapped(file) || d_unhashed(dentry)))
-+ goto out_update; /* success */
-+
-+ again:
-+ bstart = ibstart(inode);
-+ if (bstart < finfo->fi_bstart
-+ && au_flag_test(sb, AuFlag_PLINK)
-+ && au_is_plinked(sb, inode)) {
-+ struct dentry *parent = dentry->d_parent; // dget_parent()
-+ struct inode *dir = parent->d_inode, *h_dir;
-+
-+ if (test_ro(sb, bstart, inode)) {
-+ di_read_lock_parent(parent, !AUFS_I_RLOCK);
-+ bstart = err = find_rw_parent_br(dentry, bstart);
-+ //bstart = err = find_rw_br(sb, bstart);
-+ di_read_unlock(parent, !AUFS_I_RLOCK);
-+ //todo: err = -1;
-+ if (unlikely(err < 0))
-+ goto out;
-+ }
-+ di_read_unlock(dentry, AUFS_I_RLOCK);
-+ di_write_lock_child(dentry);
-+ if (bstart != ibstart(inode)) { // todo
-+ /* someone changed our inode while we were sleeping */
-+ di_downgrade_lock(dentry, AUFS_I_RLOCK);
-+ goto again;
-+ }
-+
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ err = test_and_cpup_dirs(dentry, bstart, NULL);
-+
-+ // always superio.
-+#if 1
-+ h_dir = au_h_dptr_i(parent, bstart)->d_inode;
-+ hdir_lock(h_dir, dir, bstart);
-+ err = sio_cpup_simple(dentry, bstart, -1,
-+ au_flags_cpup(CPUP_DTIME, parent));
-+ hdir_unlock(h_dir, dir, bstart);
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+#else
-+ if (!is_au_wkq(current)) {
-+ struct cpup_pseudo_link_args args = {
-+ .errp = &err,
-+ .dentry = dentry,
-+ .bdst = bstart,
-+ .do_lock = 1
-+ };
-+ au_wkq_wait(call_cpup_pseudo_link, &args);
-+ } else
-+ err = cpup_pseudo_link(dentry, bstart, /*do_lock*/1);
-+#endif
-+ di_downgrade_lock(dentry, AUFS_I_RLOCK);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+
-+ err = reopen(file);
-+ //err = -1;
-+ out_update:
-+ if (!err) {
-+ au_update_figen(file);
-+ //DbgFile(file);
-+ return 0; /* success */
-+ }
-+
-+ /* error, close all hidden files */
-+ bend = fbend(file);
-+ for (bindex = fbstart(file); bindex <= bend; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* common function to regular file and dir */
-+int au_reval_and_lock_finfo(struct file *file, int (*reopen)(struct file *file),
-+ int wlock, int locked)
-+{
-+ int err, sgen, fgen, pseudo_link;
-+ struct dentry *dentry;
-+ struct super_block *sb;
-+ aufs_bindex_t bstart;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, w %d, l %d\n", DLNPair(dentry), wlock, locked);
-+ sb = dentry->d_sb;
-+ SiMustAnyLock(sb);
-+
-+ err = 0;
-+ sgen = au_sigen(sb);
-+ fi_write_lock(file);
-+ fgen = au_figen(file);
-+ di_read_lock_child(dentry, AUFS_I_RLOCK);
-+ bstart = dbstart(dentry);
-+ pseudo_link = (bstart != ibstart(dentry->d_inode));
-+ di_read_unlock(dentry, AUFS_I_RLOCK);
-+ if (sgen == fgen && !pseudo_link && fbstart(file) == bstart) {
-+ if (!wlock)
-+ fi_downgrade_lock(file);
-+ return 0; /* success */
-+ }
-+
-+ LKTRTrace("sgen %d, fgen %d\n", sgen, fgen);
-+ if (sgen != au_digen(dentry)) {
-+ /*
-+ * d_path() and path_lookup() is a simple and good approach
-+ * to revalidate. but si_rwsem in DEBUG_RWSEM will cause a
-+ * deadlock. removed the code.
-+ */
-+ di_write_lock_child(dentry);
-+ err = au_reval_dpath(dentry, sgen);
-+ //if (LktrCond) err = -1;
-+ di_write_unlock(dentry);
-+ if (unlikely(err < 0))
-+ goto out;
-+ DEBUG_ON(au_digen(dentry) != sgen);
-+ }
-+
-+ di_read_lock_child(dentry, AUFS_I_RLOCK);
-+ err = refresh_file(file, reopen);
-+ //if (LktrCond) err = -1;
-+ di_read_unlock(dentry, AUFS_I_RLOCK);
-+ if (!err) {
-+ if (!wlock)
-+ fi_downgrade_lock(file);
-+ } else
-+ fi_write_unlock(file);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+// cf. aufs_nopage()
-+// for madvise(2)
-+static int aufs_readpage(struct file *file, struct page *page)
-+{
-+ TraceEnter();
-+ unlock_page(page);
-+ return 0;
-+}
-+
-+// they will never be called.
-+#ifdef CONFIG_AUFS_DEBUG
-+static int aufs_prepare_write(struct file *file, struct page *page,
-+ unsigned from, unsigned to)
-+{BUG();return 0;}
-+static int aufs_commit_write(struct file *file, struct page *page,
-+ unsigned from, unsigned to)
-+{BUG();return 0;}
-+static int aufs_writepage(struct page *page, struct writeback_control *wbc)
-+{BUG();return 0;}
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
-+static void aufs_sync_page(struct page *page)
-+{BUG();}
-+#else
-+static int aufs_sync_page(struct page *page)
-+{BUG(); return 0;}
-+#endif
-+
-+#if 0 // comment
-+static int aufs_writepages(struct address_space *mapping,
-+ struct writeback_control *wbc)
-+{BUG();return 0;}
-+static int aufs_readpages(struct file *filp, struct address_space *mapping,
-+ struct list_head *pages, unsigned nr_pages)
-+{BUG();return 0;}
-+static sector_t aufs_bmap(struct address_space *mapping, sector_t block)
-+{BUG();return 0;}
-+#endif
-+
-+static int aufs_set_page_dirty(struct page *page)
-+{BUG();return 0;}
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
-+static void aufs_invalidatepage (struct page *page, unsigned long offset)
-+{BUG();}
-+#else
-+static int aufs_invalidatepage (struct page *page, unsigned long offset)
-+{BUG(); return 0;}
-+#endif
-+static int aufs_releasepage (struct page *page, gfp_t gfp)
-+{BUG();return 0;}
-+static ssize_t aufs_direct_IO(int rw, struct kiocb *iocb,
-+ const struct iovec *iov, loff_t offset,
-+ unsigned long nr_segs)
-+{BUG();return 0;}
-+static struct page* aufs_get_xip_page(struct address_space *mapping,
-+ sector_t offset, int create)
-+{BUG();return NULL;}
-+//static int aufs_migratepage (struct page *newpage, struct page *page)
-+//{BUG();return 0;}
-+#endif
-+
-+#if 0 // comment
-+struct address_space {
-+ struct inode *host; /* owner: inode, block_device */
-+ struct radix_tree_root page_tree; /* radix tree of all pages */
-+ rwlock_t tree_lock; /* and rwlock protecting it */
-+ unsigned int i_mmap_writable;/* count VM_SHARED mappings */
-+ struct prio_tree_root i_mmap; /* tree of private and shared mappings */
-+ struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
-+ spinlock_t i_mmap_lock; /* protect tree, count, list */
-+ unsigned int truncate_count; /* Cover race condition with truncate */
-+ unsigned long nrpages; /* number of total pages */
-+ pgoff_t writeback_index;/* writeback starts here */
-+ struct address_space_operations *a_ops; /* methods */
-+ unsigned long flags; /* error bits/gfp mask */
-+ struct backing_dev_info *backing_dev_info; /* device readahead, etc */
-+ spinlock_t private_lock; /* for use by the address_space */
-+ struct list_head private_list; /* ditto */
-+ struct address_space *assoc_mapping; /* ditto */
-+} __attribute__((aligned(sizeof(long))));
-+
-+struct address_space_operations {
-+ int (*writepage)(struct page *page, struct writeback_control *wbc);
-+ int (*readpage)(struct file *, struct page *);
-+ void (*sync_page)(struct page *);
-+
-+ /* Write back some dirty pages from this mapping. */
-+ int (*writepages)(struct address_space *, struct writeback_control *);
-+
-+ /* Set a page dirty. Return true if this dirtied it */
-+ int (*set_page_dirty)(struct page *page);
-+
-+ int (*readpages)(struct file *filp, struct address_space *mapping,
-+ struct list_head *pages, unsigned nr_pages);
-+
-+ /*
-+ * ext3 requires that a successful prepare_write() call be followed
-+ * by a commit_write() call - they must be balanced
-+ */
-+ int (*prepare_write)(struct file *, struct page *, unsigned, unsigned);
-+ int (*commit_write)(struct file *, struct page *, unsigned, unsigned);
-+ /* Unfortunately this kludge is needed for FIBMAP. Don't use it */
-+ sector_t (*bmap)(struct address_space *, sector_t);
-+ void (*invalidatepage) (struct page *, unsigned long);
-+ int (*releasepage) (struct page *, gfp_t);
-+ ssize_t (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
-+ loff_t offset, unsigned long nr_segs);
-+ struct page* (*get_xip_page)(struct address_space *, sector_t,
-+ int);
-+ /* migrate the contents of a page to the specified target */
-+ int (*migratepage) (struct page *, struct page *);
-+};
-+#endif
-+
-+struct address_space_operations aufs_aop = {
-+ .readpage = aufs_readpage,
-+#ifdef CONFIG_AUFS_DEBUG
-+ .writepage = aufs_writepage,
-+ .sync_page = aufs_sync_page,
-+ //.writepages = aufs_writepages,
-+ .set_page_dirty = aufs_set_page_dirty,
-+ //.readpages = aufs_readpages,
-+ .prepare_write = aufs_prepare_write,
-+ .commit_write = aufs_commit_write,
-+ //.bmap = aufs_bmap,
-+ .invalidatepage = aufs_invalidatepage,
-+ .releasepage = aufs_releasepage,
-+ .direct_IO = aufs_direct_IO,
-+ .get_xip_page = aufs_get_xip_page,
-+ //.migratepage = aufs_migratepage
-+#endif
-+};
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/file.h linux-2.6.22.1/fs/aufs/file.h
---- linux-2.6.22.1.oorig/fs/aufs/file.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/file.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,140 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: file.h,v 1.25 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_FILE_H__
-+#define __AUFS_FILE_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/file.h>
-+#include <linux/fs.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+// SEEK_xxx are defined in linux/fs.h
-+#else
-+enum {SEEK_SET, SEEK_CUR, SEEK_END};
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_branch;
-+struct aufs_hfile {
-+ struct file *hf_file;
-+ struct aufs_branch *hf_br;
-+};
-+
-+struct aufs_vdir;
-+struct aufs_finfo {
-+ atomic_t fi_generation;
-+
-+ struct aufs_rwsem fi_rwsem;
-+ struct aufs_hfile *fi_hfile;
-+ aufs_bindex_t fi_bstart, fi_bend;
-+
-+ union {
-+ struct vm_operations_struct *fi_h_vm_ops;
-+ struct aufs_vdir *fi_vdir_cache;
-+ };
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* file.c */
-+extern struct address_space_operations aufs_aop;
-+unsigned int au_file_roflags(unsigned int flags);
-+struct file *hidden_open(struct dentry *dentry, aufs_bindex_t bindex,
-+ int flags);
-+int au_do_open(struct inode *inode, struct file *file,
-+ int (*open)(struct file *file, int flags));
-+int au_reopen_nondir(struct file *file);
-+int au_ready_to_write(struct file *file, loff_t len);
-+int au_reval_and_lock_finfo(struct file *file, int (*reopen)(struct file *file),
-+ int wlock, int locked);
-+
-+/* f_op.c */
-+extern struct file_operations aufs_file_fop;
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+int aufs_flush(struct file *file, fl_owner_t id);
-+#else
-+int aufs_flush(struct file *file);
-+#endif
-+
-+/* finfo.c */
-+struct aufs_finfo *ftofi(struct file *file);
-+aufs_bindex_t fbstart(struct file *file);
-+aufs_bindex_t fbend(struct file *file);
-+struct aufs_vdir *fvdir_cache(struct file *file);
-+struct aufs_branch *ftobr(struct file *file, aufs_bindex_t bindex);
-+struct file *au_h_fptr_i(struct file *file, aufs_bindex_t bindex);
-+struct file *au_h_fptr(struct file *file);
-+
-+void set_fbstart(struct file *file, aufs_bindex_t bindex);
-+void set_fbend(struct file *file, aufs_bindex_t bindex);
-+void set_fvdir_cache(struct file *file, struct aufs_vdir *vdir_cache);
-+void au_hfput(struct aufs_hfile *hf);
-+void set_h_fptr(struct file *file, aufs_bindex_t bindex, struct file *h_file);
-+void au_update_figen(struct file *file);
-+
-+void au_fin_finfo(struct file *file);
-+int au_init_finfo(struct file *file);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline int au_figen(struct file *f)
-+{
-+ return atomic_read(&ftofi(f)->fi_generation);
-+}
-+
-+static inline int au_is_mmapped(struct file *f)
-+{
-+ return !!(ftofi(f)->fi_h_vm_ops);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * fi_read_lock, fi_write_lock,
-+ * fi_read_unlock, fi_write_unlock, fi_downgrade_lock
-+ */
-+SimpleRwsemFuncs(fi, struct file *f, ftofi(f)->fi_rwsem);
-+
-+/* to debug easier, do not make them inlined functions */
-+#define FiMustReadLock(f) do {\
-+ SiMustAnyLock((f)->f_dentry->d_sb); \
-+ RwMustReadLock(&ftofi(f)->fi_rwsem); \
-+} while (0)
-+
-+#define FiMustWriteLock(f) do { \
-+ SiMustAnyLock((f)->f_dentry->d_sb); \
-+ RwMustWriteLock(&ftofi(f)->fi_rwsem); \
-+} while (0)
-+
-+#define FiMustAnyLock(f) do { \
-+ SiMustAnyLock((f)->f_dentry->d_sb); \
-+ RwMustAnyLock(&ftofi(f)->fi_rwsem); \
-+} while (0)
-+
-+#define FiMustNoWaiters(f) RwMustNoWaiters(&ftofi(f)->fi_rwsem)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_FILE_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/finfo.c linux-2.6.22.1/fs/aufs/finfo.c
---- linux-2.6.22.1.oorig/fs/aufs/finfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/finfo.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,211 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: finfo.c,v 1.23 2007/04/30 05:45:21 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+struct aufs_finfo *ftofi(struct file *file)
-+{
-+ struct aufs_finfo *finfo = file->private_data;
-+ DEBUG_ON(!finfo
-+ || !finfo->fi_hfile
-+ || (0 < finfo->fi_bend
-+ && (/* stosi(file->f_dentry->d_sb)->si_bend
-+ < finfo->fi_bend
-+ || */ finfo->fi_bend < finfo->fi_bstart)));
-+ return finfo;
-+}
-+
-+// hard/soft set
-+aufs_bindex_t fbstart(struct file *file)
-+{
-+ FiMustAnyLock(file);
-+ return ftofi(file)->fi_bstart;
-+}
-+
-+aufs_bindex_t fbend(struct file *file)
-+{
-+ FiMustAnyLock(file);
-+ return ftofi(file)->fi_bend;
-+}
-+
-+struct aufs_vdir *fvdir_cache(struct file *file)
-+{
-+ FiMustAnyLock(file);
-+ return ftofi(file)->fi_vdir_cache;
-+}
-+
-+struct aufs_branch *ftobr(struct file *file, aufs_bindex_t bindex)
-+{
-+ struct aufs_finfo *finfo = ftofi(file);
-+ struct aufs_hfile *hf;
-+
-+ FiMustAnyLock(file);
-+ DEBUG_ON(!finfo
-+ || finfo->fi_bstart < 0
-+ || bindex < finfo->fi_bstart
-+ || finfo->fi_bend < bindex);
-+ hf = finfo->fi_hfile + bindex;
-+ DEBUG_ON(hf->hf_br && br_count(hf->hf_br) <= 0);
-+ return hf->hf_br;
-+}
-+
-+struct file *au_h_fptr_i(struct file *file, aufs_bindex_t bindex)
-+{
-+ struct aufs_finfo *finfo = ftofi(file);
-+ struct aufs_hfile *hf;
-+
-+ FiMustAnyLock(file);
-+ DEBUG_ON(!finfo
-+ || finfo->fi_bstart < 0
-+ || bindex < finfo->fi_bstart
-+ || finfo->fi_bend < bindex);
-+ hf = finfo->fi_hfile + bindex;
-+ DEBUG_ON(hf->hf_file
-+ && file_count(hf->hf_file) <= 0
-+ && br_count(hf->hf_br) <= 0);
-+ return hf->hf_file;
-+}
-+
-+struct file *au_h_fptr(struct file *file)
-+{
-+ return au_h_fptr_i(file, fbstart(file));
-+}
-+
-+void set_fbstart(struct file *file, aufs_bindex_t bindex)
-+{
-+ FiMustWriteLock(file);
-+ DEBUG_ON(sbend(file->f_dentry->d_sb) < bindex);
-+ ftofi(file)->fi_bstart = bindex;
-+}
-+
-+void set_fbend(struct file *file, aufs_bindex_t bindex)
-+{
-+ FiMustWriteLock(file);
-+ DEBUG_ON(sbend(file->f_dentry->d_sb) < bindex
-+ || bindex < fbstart(file));
-+ ftofi(file)->fi_bend = bindex;
-+}
-+
-+void set_fvdir_cache(struct file *file, struct aufs_vdir *vdir_cache)
-+{
-+ FiMustWriteLock(file);
-+ DEBUG_ON(!S_ISDIR(file->f_dentry->d_inode->i_mode)
-+ || (ftofi(file)->fi_vdir_cache && vdir_cache));
-+ ftofi(file)->fi_vdir_cache = vdir_cache;
-+}
-+
-+void au_hfput(struct aufs_hfile *hf)
-+{
-+ fput(hf->hf_file);
-+ hf->hf_file = NULL;
-+ DEBUG_ON(!hf->hf_br);
-+ br_put(hf->hf_br);
-+ hf->hf_br = NULL;
-+}
-+
-+void set_h_fptr(struct file *file, aufs_bindex_t bindex, struct file *val)
-+{
-+ struct aufs_finfo *finfo = ftofi(file);
-+ struct aufs_hfile *hf;
-+
-+ FiMustWriteLock(file);
-+ DEBUG_ON(!finfo
-+ || finfo->fi_bstart < 0
-+ || bindex < finfo->fi_bstart
-+ || finfo->fi_bend < bindex);
-+ DEBUG_ON(val && file_count(val) <= 0);
-+ hf = finfo->fi_hfile + bindex;
-+ DEBUG_ON(val && hf->hf_file);
-+ if (hf->hf_file)
-+ au_hfput(hf);
-+ if (val) {
-+ hf->hf_file = val;
-+ hf->hf_br = stobr(file->f_dentry->d_sb, bindex);
-+ }
-+}
-+
-+void au_update_figen(struct file *file)
-+{
-+ atomic_set(&ftofi(file)->fi_generation, au_digen(file->f_dentry));
-+}
-+
-+void au_fin_finfo(struct file *file)
-+{
-+ struct aufs_finfo *finfo;
-+ struct dentry *dentry;
-+ aufs_bindex_t bindex, bend;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ SiMustAnyLock(dentry->d_sb);
-+
-+ fi_write_lock(file);
-+ bend = fbend(file);
-+ bindex = fbstart(file);
-+ if (bindex >= 0)
-+ for (; bindex <= bend; bindex++)
-+ set_h_fptr(file, bindex, NULL);
-+
-+ finfo = ftofi(file);
-+#ifdef CONFIG_AUFS_DEBUG
-+ if (finfo->fi_bstart >= 0) {
-+ bend = fbend(file);
-+ for (bindex = finfo->fi_bstart; bindex <= bend; bindex++) {
-+ struct aufs_hfile *hf;
-+ hf = finfo->fi_hfile + bindex;
-+ DEBUG_ON(hf->hf_file || hf->hf_br);
-+ }
-+ }
-+#endif
-+
-+ kfree(finfo->fi_hfile);
-+ fi_write_unlock(file);
-+ cache_free_finfo(finfo);
-+ //file->private_data = NULL;
-+}
-+
-+int au_init_finfo(struct file *file)
-+{
-+ struct aufs_finfo *finfo;
-+ struct dentry *dentry;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ DEBUG_ON(!dentry->d_inode);
-+
-+ finfo = cache_alloc_finfo();
-+ if (finfo) {
-+ finfo->fi_hfile = kcalloc(sbend(dentry->d_sb) + 1,
-+ sizeof(*finfo->fi_hfile), GFP_KERNEL);
-+ if (finfo->fi_hfile) {
-+ rw_init_wlock(&finfo->fi_rwsem);
-+ finfo->fi_bstart = -1;
-+ finfo->fi_bend = -1;
-+ atomic_set(&finfo->fi_generation, au_digen(dentry));
-+
-+ file->private_data = finfo;
-+ return 0; /* success */
-+ }
-+ cache_free_finfo(finfo);
-+ }
-+
-+ TraceErr(-ENOMEM);
-+ return -ENOMEM;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/hinotify.c linux-2.6.22.1/fs/aufs/hinotify.c
---- linux-2.6.22.1.oorig/fs/aufs/hinotify.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/hinotify.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,536 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: hinotify.c,v 1.19 2007/05/14 03:39:21 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+static struct inotify_handle *in_handle;
-+static const __u32 in_mask = (IN_MOVE | IN_DELETE | IN_CREATE /* | IN_ACCESS */
-+ | IN_MODIFY | IN_ATTRIB
-+ | IN_DELETE_SELF | IN_MOVE_SELF);
-+
-+int alloc_hinotify(struct aufs_hinode *hinode, struct inode *inode,
-+ struct inode *hidden_inode)
-+{
-+ int err;
-+ struct aufs_hinotify *hin;
-+ s32 wd;
-+
-+ LKTRTrace("i%lu, hi%lu\n", inode->i_ino, hidden_inode->i_ino);
-+
-+ err = -ENOMEM;
-+ hin = cache_alloc_hinotify();
-+ if (hin) {
-+ DEBUG_ON(hinode->hi_notify);
-+ hinode->hi_notify = hin;
-+ hin->hin_aufs_inode = inode;
-+ inotify_init_watch(&hin->hin_watch);
-+ wd = inotify_add_watch(in_handle, &hin->hin_watch, hidden_inode,
-+ in_mask);
-+ if (wd >= 0)
-+ return 0; /* success */
-+
-+ err = wd;
-+ put_inotify_watch(&hin->hin_watch);
-+ cache_free_hinotify(hin);
-+ hinode->hi_notify = NULL;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+void do_free_hinotify(struct aufs_hinode *hinode)
-+{
-+ int err;
-+ struct aufs_hinotify *hin;
-+
-+ TraceEnter();
-+
-+ hin = hinode->hi_notify;
-+ if (hin) {
-+ err = 0;
-+ if (atomic_read(&hin->hin_watch.count))
-+ err = inotify_rm_watch(in_handle, &hin->hin_watch);
-+
-+ if (!err) {
-+ cache_free_hinotify(hin);
-+ hinode->hi_notify = NULL;
-+ } else
-+ IOErr1("failed inotify_rm_watch() %d\n", err);
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void ctl_hinotify(struct aufs_hinode *hinode, const __u32 mask)
-+{
-+ struct inode *hi;
-+ struct inotify_watch *watch;
-+
-+ hi = hinode->hi_inode;
-+ LKTRTrace("hi%lu, sb %p, 0x%x\n", hi->i_ino, hi->i_sb, mask);
-+ if (0 && !strcmp(current->comm, "link"))
-+ dump_stack();
-+ IMustLock(hi);
-+ if (!hinode->hi_notify)
-+ return;
-+
-+ watch = &hinode->hi_notify->hin_watch;
-+#if 0
-+ {
-+ u32 wd;
-+ wd = inotify_find_update_watch(in_handle, hi, mask);
-+ TraceErr(wd);
-+ // ignore an err;
-+ }
-+#else
-+ watch->mask = mask;
-+ smp_mb();
-+#endif
-+ LKTRTrace("watch %p, mask %u\n", watch, watch->mask);
-+}
-+
-+#define suspend_hinotify(hi) ctl_hinotify(hi, 0)
-+#define resume_hinotify(hi) ctl_hinotify(hi, in_mask)
-+
-+void do_hdir_lock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex,
-+ unsigned int lsc)
-+{
-+ struct aufs_hinode *hinode;
-+
-+ LKTRTrace("i%lu, b%d, lsc %d\n", dir->i_ino, bindex, lsc);
-+ DEBUG_ON(!S_ISDIR(dir->i_mode));
-+ hinode = itoii(dir)->ii_hinode + bindex;
-+ DEBUG_ON(h_dir != hinode->hi_inode);
-+
-+ hi_lock(h_dir, lsc);
-+ if (1 /* unlikely(au_flag_test(dir->i_sb, AuFlag_UDBA_HINOTIFY) */)
-+ suspend_hinotify(hinode);
-+}
-+
-+void hdir_unlock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex)
-+{
-+ struct aufs_hinode *hinode;
-+
-+ LKTRTrace("i%lu, b%d\n", dir->i_ino, bindex);
-+ DEBUG_ON(!S_ISDIR(dir->i_mode));
-+ hinode = itoii(dir)->ii_hinode + bindex;
-+ DEBUG_ON(h_dir != hinode->hi_inode);
-+
-+ if (1 /* unlikely(au_flag_test(dir->i_sb, AuFlag_UDBA_HINOTIFY) */)
-+ resume_hinotify(hinode);
-+ i_unlock(h_dir);
-+}
-+
-+void hdir_lock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir)
-+{
-+ struct aufs_hinode *hinode;
-+
-+ LKTRTrace("%.*s, %.*s\n", DLNPair(h_parents[0]), DLNPair(h_parents[1]));
-+
-+ vfsub_lock_rename(h_parents[0], h_parents[1]);
-+ hinode = itoii(dirs[0])->ii_hinode + bindex;
-+ DEBUG_ON(h_parents[0]->d_inode != hinode->hi_inode);
-+ suspend_hinotify(hinode);
-+ if (issamedir)
-+ return;
-+ hinode = itoii(dirs[1])->ii_hinode + bindex;
-+ DEBUG_ON(h_parents[1]->d_inode != hinode->hi_inode);
-+ suspend_hinotify(hinode);
-+}
-+
-+void hdir_unlock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir)
-+{
-+ struct aufs_hinode *hinode;
-+
-+ LKTRTrace("%.*s, %.*s\n", DLNPair(h_parents[0]), DLNPair(h_parents[1]));
-+
-+ hinode = itoii(dirs[0])->ii_hinode + bindex;
-+ DEBUG_ON(h_parents[0]->d_inode != hinode->hi_inode);
-+ resume_hinotify(hinode);
-+ if (!issamedir) {
-+ hinode = itoii(dirs[1])->ii_hinode + bindex;
-+ DEBUG_ON(h_parents[1]->d_inode != hinode->hi_inode);
-+ resume_hinotify(hinode);
-+ }
-+ vfsub_unlock_rename(h_parents[0], h_parents[1]);
-+}
-+
-+void au_reset_hinotify(struct inode *inode, unsigned int flags)
-+{
-+ aufs_bindex_t bindex, bend;
-+ struct inode *hi;
-+
-+ LKTRTrace("i%lu, 0x%x\n", inode->i_ino, flags);
-+
-+ bend = ibend(inode);
-+ for (bindex = ibstart(inode); bindex <= bend; bindex++) {
-+ hi = au_h_iptr_i(inode, bindex);
-+ if (hi) {
-+ //hi_lock(hi, AUFS_LSC_H_CHILD);
-+ igrab(hi);
-+ set_h_iptr(inode, bindex, NULL, 0);
-+ set_h_iptr(inode, bindex, igrab(hi), flags);
-+ iput(hi);
-+ //i_unlock(hi);
-+ }
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+static char *in_name(u32 mask)
-+{
-+#define test_ret(flag) if (mask & flag) return #flag;
-+ test_ret(IN_ACCESS);
-+ test_ret(IN_MODIFY);
-+ test_ret(IN_ATTRIB);
-+ test_ret(IN_CLOSE_WRITE);
-+ test_ret(IN_CLOSE_NOWRITE);
-+ test_ret(IN_OPEN);
-+ test_ret(IN_MOVED_FROM);
-+ test_ret(IN_MOVED_TO);
-+ test_ret(IN_CREATE);
-+ test_ret(IN_DELETE);
-+ test_ret(IN_DELETE_SELF);
-+ test_ret(IN_MOVE_SELF);
-+ test_ret(IN_UNMOUNT);
-+ test_ret(IN_Q_OVERFLOW);
-+ test_ret(IN_IGNORED);
-+ return "";
-+#undef test_ret
-+}
-+#else
-+#define in_name(m) "??"
-+#endif
-+
-+static int dec_gen_by_name(struct inode *dir, const char *_name, u32 mask)
-+{
-+ int err;
-+ struct dentry *parent, *child;
-+ struct inode *inode;
-+ struct qstr *dname;
-+ char *name = (void*)_name;
-+ unsigned int len;
-+
-+ LKTRTrace("i%lu, %s, 0x%x %s\n",
-+ dir->i_ino, name, mask, in_name(mask));
-+
-+ err = -1;
-+ parent = d_find_alias(dir);
-+ if (unlikely(!parent))
-+ goto out;
-+
-+#if 0
-+ if (unlikely(!memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)))
-+ name += AUFS_WH_PFX_LEN;
-+#endif
-+ len = strlen(name);
-+ spin_lock(&dcache_lock);
-+ list_for_each_entry(child, &parent->d_subdirs, d_u.d_child) {
-+ dname = &child->d_name;
-+ if (len == dname->len && !memcmp(dname->name, name, len)) {
-+ au_digen_dec(child);
-+#if 1
-+ //todo: why both are needed
-+ if (mask & IN_MOVE) {
-+ spin_lock(&child->d_lock);
-+ __d_drop(child);
-+ spin_unlock(&child->d_lock);
-+ }
-+#endif
-+
-+ inode = child->d_inode;
-+ if (inode)
-+ au_iigen_dec(inode);
-+ err = !!inode;
-+
-+ // todo: the i_nlink of newly created name by link(2)
-+ // should be updated
-+ // todo: some nfs dentry doesn't notified at deleteing
-+ break;
-+ }
-+ }
-+ spin_unlock(&dcache_lock);
-+ dput(parent);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct postproc_args {
-+ struct inode *h_dir, *dir, *h_child_inode;
-+ char *h_child_name;
-+ u32 mask;
-+};
-+
-+static void dec_gen_by_ino(struct postproc_args *a)
-+{
-+ struct super_block *sb;
-+ aufs_bindex_t bindex, bend, bfound;
-+ struct xino xino;
-+ struct inode *cinode;
-+
-+ TraceEnter();
-+
-+ sb = a->dir->i_sb;
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_XINO));
-+
-+ bfound = -1;
-+ bend = ibend(a->dir);
-+ for (bindex = ibstart(a->dir); bfound == -1 && bindex <= bend; bindex++)
-+ if (au_h_iptr_i(a->dir, bindex) == a->h_dir)
-+ bfound = bindex;
-+ if (bfound < 0)
-+ return;
-+
-+ bindex = find_brindex(sb, itoii(a->dir)->ii_hinode[bfound + 0].hi_id);
-+ if (bindex < 0)
-+ return;
-+ if (unlikely(xino_read(sb, bindex, a->h_child_inode->i_ino, &xino)))
-+ return;
-+ cinode = NULL;
-+ if (xino.ino)
-+ cinode = ilookup(sb, xino.ino);
-+ if (cinode) {
-+#if 1
-+ if (1 || a->mask & IN_MOVE) {
-+ struct dentry *child;
-+ spin_lock(&dcache_lock);
-+ list_for_each_entry(child, &cinode->i_dentry, d_alias)
-+ au_digen_dec(child);
-+ spin_unlock(&dcache_lock);
-+ }
-+#endif
-+ au_iigen_dec(cinode);
-+ iput(cinode);
-+ }
-+}
-+
-+static void reset_ino(struct postproc_args *a)
-+{
-+ aufs_bindex_t bindex, bend;
-+ struct super_block *sb;
-+ struct inode *h_dir;
-+
-+ sb = a->dir->i_sb;
-+ bend = ibend(a->dir);
-+ for (bindex = ibstart(a->dir); bindex <= bend; bindex++) {
-+ h_dir = au_h_iptr_i(a->dir, bindex);
-+ if (h_dir && h_dir != a->h_dir)
-+ xino_write0(sb, bindex, h_dir->i_ino);
-+ /* ignore this error */
-+ }
-+}
-+
-+static void postproc(void *args)
-+{
-+ struct postproc_args *a = args;
-+ struct super_block *sb;
-+ struct aufs_vdir *vdir;
-+
-+ //au_debug_on();
-+ LKTRTrace("mask 0x%x %s, i%lu, hi%lu, hci%lu\n",
-+ a->mask, in_name(a->mask), a->dir->i_ino, a->h_dir->i_ino,
-+ a->h_child_inode ? a->h_child_inode->i_ino : 0);
-+ DEBUG_ON(!a->dir);
-+#if 0//def ForceInotify
-+ Dbg("mask 0x%x %s, i%lu, hi%lu, hci%lu\n",
-+ a->mask, in_name(a->mask), a->dir->i_ino, a->h_dir->i_ino,
-+ a->h_child_inode ? a->h_child_inode->i_ino : 0);
-+#endif
-+
-+ i_lock(a->dir);
-+ sb = a->dir->i_sb;
-+ si_read_lock(sb); // consider write_lock
-+ ii_write_lock_parent(a->dir);
-+
-+ /* make dir entries obsolete */
-+ vdir = ivdir(a->dir);
-+ if (vdir)
-+ vdir->vd_jiffy = 0;
-+ a->dir->i_version++;
-+
-+ /*
-+ * special handling root directory,
-+ * sine d_revalidate may not be called later.
-+ * main purpose is maintaining i_nlink.
-+ */
-+ if (unlikely(a->dir->i_ino == AUFS_ROOT_INO))
-+ au_cpup_attr_all(a->dir);
-+
-+ if (a->h_child_inode && au_flag_test(sb, AuFlag_XINO))
-+ dec_gen_by_ino(a);
-+ else if (a->mask & (IN_MOVE_SELF | IN_DELETE_SELF))
-+ reset_ino(a);
-+
-+ ii_write_unlock(a->dir);
-+ si_read_unlock(sb);
-+ i_unlock(a->dir);
-+
-+ au_mntput(a->dir->i_sb);
-+ iput(a->h_child_inode);
-+ iput(a->h_dir);
-+ iput(a->dir);
-+#if 0
-+ if (atomic_dec_and_test(&stosi(sb)->si_hinotify))
-+ wake_up_all(&stosi(sb)->si_hinotify_wq);
-+#endif
-+ kfree(a);
-+ //au_debug_off();
-+}
-+
-+static void aufs_inotify(struct inotify_watch *watch, u32 wd, u32 mask,
-+ u32 cookie, const char *h_child_name,
-+ struct inode *h_child_inode)
-+{
-+ struct aufs_hinotify *hinotify;
-+ struct postproc_args *args;
-+ int len;
-+ char *p;
-+ struct inode *dir;
-+ //static DECLARE_WAIT_QUEUE_HEAD(wq);
-+
-+ //au_debug_on();
-+ LKTRTrace("i%lu, wd %d, mask 0x%x %s, cookie 0x%x, hcname %s, hi%lu\n",
-+ watch->inode->i_ino, wd, mask, in_name(mask), cookie,
-+ h_child_name ? h_child_name : "",
-+ h_child_inode ? h_child_inode->i_ino : 0);
-+ //au_debug_off();
-+ //IMustLock(h_dir);
-+#if 0 //defined(ForceInotify) || defined(DbgInotify)
-+ Dbg("i%lu, wd %d, mask 0x%x %s, cookie 0x%x, hcname %s, hi%lu\n",
-+ watch->inode->i_ino, wd, mask, in_name(mask), cookie,
-+ h_child_name ? h_child_name : "",
-+ h_child_inode ? h_child_inode->i_ino : 0);
-+#endif
-+ /* if IN_UNMOUNT happens, there must be another bug */
-+ if (mask & (IN_IGNORED | IN_UNMOUNT)) {
-+ put_inotify_watch(watch);
-+ return;
-+ }
-+
-+ switch (mask & IN_ALL_EVENTS) {
-+ case IN_MODIFY:
-+ case IN_ATTRIB:
-+ if (h_child_name)
-+ return;
-+ break;
-+
-+ case IN_MOVED_FROM:
-+ case IN_MOVED_TO:
-+ case IN_CREATE:
-+ DEBUG_ON(!h_child_name || !h_child_inode);
-+ break;
-+ case IN_DELETE:
-+ /*
-+ * aufs never be able to get this child inode.
-+ * revalidation should be in d_revalide()
-+ * by checking i_nlink, i_generation or d_unhashed().
-+ */
-+ DEBUG_ON(!h_child_name);
-+ break;
-+
-+ case IN_DELETE_SELF:
-+ case IN_MOVE_SELF:
-+ DEBUG_ON(h_child_name || h_child_inode);
-+ break;
-+
-+ case IN_ACCESS:
-+ default:
-+ DEBUG_ON(1);
-+ }
-+
-+#ifdef DbgInotify
-+ WARN_ON(1);
-+#endif
-+
-+ /* iput() will be called in postproc() */
-+ hinotify = container_of(watch, struct aufs_hinotify, hin_watch);
-+ DEBUG_ON(!hinotify || !hinotify->hin_aufs_inode);
-+ dir = hinotify->hin_aufs_inode;
-+
-+ /* force re-lookup in next d_revalidate() */
-+ if (dir->i_ino != AUFS_ROOT_INO)
-+ au_iigen_dec(dir);
-+ len = 0;
-+ if (h_child_name && dec_gen_by_name(dir, h_child_name, mask))
-+ len = strlen(h_child_name);
-+
-+ //wait_event(wq, (args = kmalloc(sizeof(*args), GFP_KERNEL)));
-+ args = kmalloc(sizeof(*args) + len + 1, GFP_KERNEL);
-+ if (unlikely(!args)) {
-+ Err("no memory\n");
-+ return;
-+ }
-+ args->mask = mask;
-+ args->dir = igrab(dir);
-+ args->h_dir = igrab(watch->inode);
-+ args->h_child_inode = NULL;
-+ if (len) {
-+ if (h_child_inode)
-+ args->h_child_inode = igrab(h_child_inode);
-+ p = (void*)args;
-+ args->h_child_name = p + sizeof(*args);
-+ memcpy(args->h_child_name, h_child_name, len + 1);
-+ }
-+ //atomic_inc(&stosi(args->dir->i_sb)->si_hinotify);
-+ /* prohibit umount */
-+ au_mntget(args->dir->i_sb);
-+ au_wkq_nowait(postproc, args, /*dlgt*/0);
-+}
-+
-+#if 0
-+void hinotify_flush(struct super_block *sb)
-+{
-+ atomic_t *p = &stosi(sb)->si_hinotify;
-+ wait_event(stosi(sb)->si_hinotify_wq, !atomic_read(p));
-+}
-+#endif
-+
-+static void aufs_inotify_destroy(struct inotify_watch *watch)
-+{
-+ return;
-+}
-+
-+static struct inotify_operations aufs_inotify_ops = {
-+ .handle_event = aufs_inotify,
-+ .destroy_watch = aufs_inotify_destroy
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int __init au_inotify_init(void)
-+{
-+ in_handle = inotify_init(&aufs_inotify_ops);
-+ if (!IS_ERR(in_handle))
-+ return 0;
-+ TraceErrPtr(in_handle);
-+ return PTR_ERR(in_handle);
-+}
-+
-+void au_inotify_fin(void)
-+{
-+ inotify_destroy(in_handle);
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/i_op.c linux-2.6.22.1/fs/aufs/i_op.c
---- linux-2.6.22.1.oorig/fs/aufs/i_op.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/i_op.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,641 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: i_op.c,v 1.30 2007/04/23 00:55:05 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include <linux/security.h>
-+#include <asm/uaccess.h>
-+#include "aufs.h"
-+
-+#ifdef CONFIG_AUFS_DLGT
-+struct security_inode_permission_args {
-+ int *errp;
-+ struct inode *h_inode;
-+ int mask;
-+ struct nameidata *fake_nd;
-+};
-+
-+static void call_security_inode_permission(void *args)
-+{
-+ struct security_inode_permission_args *a = args;
-+ LKTRTrace("fsuid %d\n", current->fsuid);
-+ *a->errp = security_inode_permission(a->h_inode, a->mask, a->fake_nd);
-+}
-+#endif
-+
-+static int hidden_permission(struct inode *hidden_inode, int mask,
-+ struct nameidata *fake_nd, int brperm, int dlgt)
-+{
-+ int err, submask;
-+ const int write_mask = (mask & (MAY_WRITE | MAY_APPEND));
-+
-+ LKTRTrace("ino %lu, mask 0x%x, brperm 0x%x\n",
-+ hidden_inode->i_ino, mask, brperm);
-+
-+ err = -EACCES;
-+ if (unlikely(write_mask && IS_IMMUTABLE(hidden_inode)))
-+ goto out;
-+
-+ /* skip hidden fs test in the case of write to ro branch */
-+ submask = mask & ~MAY_APPEND;
-+ if (unlikely((write_mask && !br_writable(brperm))
-+ || !hidden_inode->i_op
-+ || !hidden_inode->i_op->permission)) {
-+ //LKTRLabel(generic_permission);
-+ err = generic_permission(hidden_inode, submask, NULL);
-+ } else {
-+ //LKTRLabel(h_inode->permission);
-+ err = hidden_inode->i_op->permission(hidden_inode, submask,
-+ fake_nd);
-+ TraceErr(err);
-+ }
-+
-+#if 1
-+ if (!err) {
-+#ifndef CONFIG_AUFS_DLGT
-+ err = security_inode_permission(hidden_inode, mask, fake_nd);
-+#else
-+ if (!dlgt)
-+ err = security_inode_permission(hidden_inode, mask,
-+ fake_nd);
-+ else {
-+ struct security_inode_permission_args args = {
-+ .errp = &err,
-+ .h_inode = hidden_inode,
-+ .mask = mask,
-+ .fake_nd = fake_nd
-+ };
-+ au_wkq_wait(call_security_inode_permission, &args,
-+ /*dlgt*/1);
-+ }
-+#endif
-+ }
-+#endif
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int silly_lock(struct inode *inode, struct nameidata *nd)
-+{
-+ int locked = 0;
-+ struct super_block *sb = inode->i_sb;
-+
-+ LKTRTrace("i%lu, nd %p\n", inode->i_ino, nd);
-+
-+#ifdef CONFIG_AUFS_FAKE_DM
-+ si_read_lock(sb);
-+ ii_read_lock_child(inode);
-+#else
-+ if (!nd || !nd->dentry) {
-+ si_read_lock(sb);
-+ ii_read_lock_child(inode);
-+ } else if (nd->dentry->d_inode != inode) {
-+ locked = 1;
-+ /* lock child first, then parent */
-+ si_read_lock(sb);
-+ ii_read_lock_child(inode);
-+ di_read_lock_parent(nd->dentry, 0);
-+ } else {
-+ locked = 2;
-+ aufs_read_lock(nd->dentry, AUFS_I_RLOCK);
-+ }
-+#endif
-+ return locked;
-+}
-+
-+static void silly_unlock(int locked, struct inode *inode, struct nameidata *nd)
-+{
-+ struct super_block *sb = inode->i_sb;
-+
-+ LKTRTrace("locked %d, i%lu, nd %p\n", locked, inode->i_ino, nd);
-+
-+#ifdef CONFIG_AUFS_FAKE_DM
-+ ii_read_unlock(inode);
-+ si_read_unlock(sb);
-+#else
-+ switch (locked) {
-+ case 0:
-+ ii_read_unlock(inode);
-+ si_read_unlock(sb);
-+ break;
-+ case 1:
-+ di_read_unlock(nd->dentry, 0);
-+ ii_read_unlock(inode);
-+ si_read_unlock(sb);
-+ break;
-+ case 2:
-+ aufs_read_unlock(nd->dentry, AUFS_I_RLOCK);
-+ break;
-+ default:
-+ BUG();
-+ }
-+#endif
-+}
-+
-+static int aufs_permission(struct inode *inode, int mask, struct nameidata *nd)
-+{
-+ int err, locked, dlgt;
-+ aufs_bindex_t bindex, bend;
-+ struct inode *hidden_inode;
-+ struct super_block *sb;
-+ struct nameidata fake_nd, *p;
-+ const int write_mask = (mask & (MAY_WRITE | MAY_APPEND));
-+ const int nondir = !S_ISDIR(inode->i_mode);
-+
-+ LKTRTrace("ino %lu, mask 0x%x, nondir %d, write_mask %d, "
-+ "nd %p{%p, %p}\n",
-+ inode->i_ino, mask, nondir, write_mask,
-+ nd, nd ? nd->dentry : NULL, nd ? nd->mnt : NULL);
-+
-+ sb = inode->i_sb;
-+ locked = silly_lock(inode, nd);
-+ dlgt = need_dlgt(sb);
-+
-+ if (nd)
-+ fake_nd = *nd;
-+ if (/* unlikely */(nondir || write_mask)) {
-+ hidden_inode = au_h_iptr(inode);
-+ DEBUG_ON(!hidden_inode
-+ || ((hidden_inode->i_mode & S_IFMT)
-+ != (inode->i_mode & S_IFMT)));
-+ err = 0;
-+ bindex = ibstart(inode);
-+ p = fake_dm(&fake_nd, nd, sb, bindex);
-+ /* actual test will be delegated to LSM */
-+ if (IS_ERR(p))
-+ DEBUG_ON(PTR_ERR(p) != -ENOENT);
-+ else {
-+ err = hidden_permission(hidden_inode, mask, p,
-+ sbr_perm(sb, bindex), dlgt);
-+ fake_dm_release(p);
-+ }
-+ if (write_mask && !err) {
-+ err = find_rw_br(sb, bindex);
-+ if (err >= 0)
-+ err = 0;
-+ }
-+ goto out;
-+ }
-+
-+ /* non-write to dir */
-+ err = 0;
-+ bend = ibend(inode);
-+ for (bindex = ibstart(inode); !err && bindex <= bend; bindex++) {
-+ hidden_inode = au_h_iptr_i(inode, bindex);
-+ if (!hidden_inode)
-+ continue;
-+ DEBUG_ON(!S_ISDIR(hidden_inode->i_mode));
-+
-+ p = fake_dm(&fake_nd, nd, sb, bindex);
-+ /* actual test will be delegated to LSM */
-+ if (IS_ERR(p))
-+ DEBUG_ON(PTR_ERR(p) != -ENOENT);
-+ else {
-+ err = hidden_permission(hidden_inode, mask, p,
-+ sbr_perm(sb, bindex), dlgt);
-+ fake_dm_release(p);
-+ }
-+ }
-+
-+ out:
-+ silly_unlock(locked, inode, nd);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static struct dentry *aufs_lookup(struct inode *dir, struct dentry *dentry,
-+ struct nameidata *nd)
-+{
-+ struct dentry *ret, *parent;
-+ int err, npositive;
-+ struct inode *inode;
-+
-+ LKTRTrace("dir %lu, %.*s\n", dir->i_ino, DLNPair(dentry));
-+ DEBUG_ON(IS_ROOT(dentry));
-+ IMustLock(dir);
-+
-+ parent = dentry->d_parent; // dget_parent()
-+ aufs_read_lock(parent, !AUFS_I_RLOCK);
-+ err = au_alloc_dinfo(dentry);
-+ //if (LktrCond) err = -1;
-+ ret = ERR_PTR(err);
-+ if (unlikely(err))
-+ goto out;
-+
-+ err = npositive = lkup_dentry(dentry, dbstart(parent), /*type*/0);
-+ //err = -1;
-+ ret = ERR_PTR(err);
-+ if (unlikely(err < 0))
-+ goto out_unlock;
-+ inode = NULL;
-+ if (npositive) {
-+ inode = au_new_inode(dentry);
-+ ret = (void*)inode;
-+ }
-+ if (!IS_ERR(inode)) {
-+#if 1
-+ /* d_splice_alias() also supports d_add() */
-+ ret = d_splice_alias(inode, dentry);
-+ if (unlikely(IS_ERR(ret) && inode))
-+ ii_write_unlock(inode);
-+#else
-+ d_add(dentry, inode);
-+#endif
-+ }
-+
-+ out_unlock:
-+ di_write_unlock(dentry);
-+ out:
-+ aufs_read_unlock(parent, !AUFS_I_RLOCK);
-+ TraceErrPtr(ret);
-+ return ret;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * decide the branch and the parent dir where we will create a new entry.
-+ * returns new bindex or an error.
-+ * copyup the parent dir if needed.
-+ */
-+int wr_dir(struct dentry *dentry, int add_entry, struct dentry *src_dentry,
-+ aufs_bindex_t force_btgt, int do_lock_srcdir)
-+{
-+ int err;
-+ aufs_bindex_t bcpup, bstart, src_bstart;
-+ struct dentry *hidden_parent;
-+ struct super_block *sb;
-+ struct dentry *parent, *src_parent = NULL;
-+ struct inode *dir, *src_dir = NULL;
-+
-+ LKTRTrace("%.*s, add %d, src %p, force %d, lock_srcdir %d\n",
-+ DLNPair(dentry), add_entry, src_dentry, force_btgt,
-+ do_lock_srcdir);
-+
-+ sb = dentry->d_sb;
-+ parent = dentry->d_parent; // dget_parent()
-+ bcpup = bstart = dbstart(dentry);
-+ if (force_btgt < 0) {
-+ if (src_dentry) {
-+ src_bstart = dbstart(src_dentry);
-+ if (src_bstart < bstart)
-+ bcpup = src_bstart;
-+ }
-+ if (test_ro(sb, bcpup, dentry->d_inode)) {
-+ if (!add_entry)
-+ di_read_lock_parent(parent, !AUFS_I_RLOCK);
-+ bcpup = err = find_rw_parent_br(dentry, bcpup);
-+ //bcpup = err = find_rw_br(sb, bcpup);
-+ if (!add_entry)
-+ di_read_unlock(parent, !AUFS_I_RLOCK);
-+ //err = -1;
-+ if (unlikely(err < 0))
-+ goto out;
-+ }
-+ } else {
-+ DEBUG_ON(bstart <= force_btgt
-+ || test_ro(sb, force_btgt, dentry->d_inode));
-+ bcpup = force_btgt;
-+ }
-+ LKTRTrace("bstart %d, bcpup %d\n", bstart, bcpup);
-+
-+ err = bcpup;
-+ if (bcpup == bstart)
-+ goto out; /* success */
-+
-+ /* copyup the new parent into the branch we process */
-+ hidden_parent = au_h_dptr(dentry)->d_parent; // dget_parent()
-+ if (src_dentry) {
-+ src_parent = src_dentry->d_parent; // dget_parent()
-+ src_dir = src_parent->d_inode;
-+ if (do_lock_srcdir)
-+ di_write_lock_parent2(src_parent);
-+ }
-+
-+ dir = parent->d_inode;
-+ if (add_entry) {
-+ au_update_dbstart(dentry);
-+ IMustLock(dir);
-+ DiMustWriteLock(parent);
-+ IiMustWriteLock(dir);
-+ } else
-+ di_write_lock_parent(parent);
-+
-+ err = 0;
-+ if (!au_h_dptr_i(parent, bcpup))
-+ err = cpup_dirs(dentry, bcpup, src_parent);
-+ //err = -1;
-+ if (!err && add_entry) {
-+ hidden_parent = au_h_dptr_i(parent, bcpup);
-+ DEBUG_ON(!hidden_parent || !hidden_parent->d_inode);
-+ hi_lock_parent(hidden_parent->d_inode);
-+ err = lkup_neg(dentry, bcpup);
-+ //err = -1;
-+ i_unlock(hidden_parent->d_inode);
-+ }
-+
-+ if (!add_entry)
-+ di_write_unlock(parent);
-+ if (do_lock_srcdir)
-+ di_write_unlock(src_parent);
-+ if (!err)
-+ err = bcpup; /* success */
-+ //err = -EPERM;
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int aufs_setattr(struct dentry *dentry, struct iattr *ia)
-+{
-+ int err, isdir;
-+ aufs_bindex_t bstart, bcpup;
-+ struct inode *hidden_inode, *inode, *dir, *h_dir, *gh_dir, *gdir;
-+ struct dentry *hidden_dentry, *parent;
-+ unsigned int udba;
-+
-+ LKTRTrace("%.*s, ia_valid 0x%x\n", DLNPair(dentry), ia->ia_valid);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ bstart = dbstart(dentry);
-+ bcpup = err = wr_dir(dentry, /*add*/0, /*src_dentry*/NULL,
-+ /*force_btgt*/-1, /*do_lock_srcdir*/0);
-+ //err = -1;
-+ if (unlikely(err < 0))
-+ goto out;
-+
-+ /* crazy udba locks */
-+ udba = au_flag_test(dentry->d_sb, AuFlag_UDBA_INOTIFY);
-+ parent = NULL;
-+ gdir = gh_dir = dir = h_dir = NULL;
-+ if ((udba || bstart != bcpup) && !IS_ROOT(dentry)) {
-+ parent = dentry->d_parent; // dget_parent()
-+ dir = parent->d_inode;
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ h_dir = au_h_iptr_i(dir, bcpup);
-+ }
-+ if (parent) {
-+ if (unlikely(udba && !IS_ROOT(parent))) {
-+ gdir = parent->d_parent->d_inode; // dget_parent()
-+ ii_read_lock_parent2(gdir);
-+ gh_dir = au_h_iptr_i(gdir, bcpup);
-+ hgdir_lock(gh_dir, gdir, bcpup);
-+ }
-+ hdir_lock(h_dir, dir, bcpup);
-+ }
-+
-+ isdir = S_ISDIR(inode->i_mode);
-+ hidden_dentry = au_h_dptr(dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+
-+#define HiLock(bindex) do {\
-+ if (!isdir) \
-+ hi_lock_child(hidden_inode); \
-+ else \
-+ hdir2_lock(hidden_inode, inode, bindex); \
-+ } while (0)
-+#define HiUnlock(bindex) do {\
-+ if (!isdir) \
-+ i_unlock(hidden_inode); \
-+ else \
-+ hdir_unlock(hidden_inode, inode, bindex); \
-+ } while (0)
-+
-+ if (bstart != bcpup) {
-+ loff_t size = -1;
-+
-+ if ((ia->ia_valid & ATTR_SIZE)
-+ && ia->ia_size < i_size_read(inode)) {
-+ size = ia->ia_size;
-+ ia->ia_valid &= ~ATTR_SIZE;
-+ }
-+ HiLock(bstart);
-+ err = sio_cpup_simple(dentry, bcpup, size,
-+ au_flags_cpup(CPUP_DTIME, parent));
-+ //err = -1;
-+ HiUnlock(bstart);
-+ if (unlikely(err || !ia->ia_valid))
-+ goto out_unlock;
-+
-+ hidden_dentry = au_h_dptr(dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+ }
-+
-+ HiLock(bcpup);
-+ err = vfsub_notify_change(hidden_dentry, ia, need_dlgt(dentry->d_sb));
-+ //err = -1;
-+ if (!err)
-+ au_cpup_attr_changable(inode);
-+ HiUnlock(bcpup);
-+#undef HiLock
-+#undef HiUnlock
-+
-+ out_unlock:
-+ if (parent) {
-+ hdir_unlock(h_dir, dir, bcpup);
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ }
-+ if (unlikely(gdir)) {
-+ hdir_unlock(gh_dir, gdir, bcpup);
-+ ii_read_unlock(gdir);
-+ }
-+ out:
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int hidden_readlink(struct dentry *dentry, int bindex,
-+ char __user * buf, int bufsiz)
-+{
-+ struct super_block *sb;
-+ struct dentry *hidden_dentry;
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (unlikely(!hidden_dentry->d_inode->i_op
-+ || !hidden_dentry->d_inode->i_op->readlink))
-+ return -EINVAL;
-+
-+ sb = dentry->d_sb;
-+ if (!test_ro(sb, bindex, dentry->d_inode)) {
-+ touch_atime(sbr_mnt(sb, bindex), hidden_dentry);
-+ dentry->d_inode->i_atime = hidden_dentry->d_inode->i_atime;
-+ }
-+ return hidden_dentry->d_inode->i_op->readlink
-+ (hidden_dentry, buf, bufsiz);
-+}
-+
-+static int aufs_readlink(struct dentry *dentry, char __user * buf, int bufsiz)
-+{
-+ int err;
-+
-+ LKTRTrace("%.*s, %d\n", DLNPair(dentry), bufsiz);
-+
-+ aufs_read_lock(dentry, AUFS_I_RLOCK);
-+ err = hidden_readlink(dentry, dbstart(dentry), buf, bufsiz);
-+ //err = -1;
-+ aufs_read_unlock(dentry, AUFS_I_RLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static void *aufs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+ int err;
-+ char *buf;
-+ mm_segment_t old_fs;
-+
-+ LKTRTrace("%.*s, nd %.*s\n", DLNPair(dentry), DLNPair(nd->dentry));
-+
-+ err = -ENOMEM;
-+ buf = __getname();
-+ //buf = NULL;
-+ if (unlikely(!buf))
-+ goto out;
-+
-+ aufs_read_lock(dentry, AUFS_I_RLOCK);
-+ old_fs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = hidden_readlink(dentry, dbstart(dentry), (char __user *)buf,
-+ PATH_MAX);
-+ //err = -1;
-+ set_fs(old_fs);
-+ aufs_read_unlock(dentry, AUFS_I_RLOCK);
-+
-+ if (err >= 0) {
-+ buf[err] = 0;
-+ /* will be freed by put_link */
-+ nd_set_link(nd, buf);
-+ return NULL; /* success */
-+ }
-+ __putname(buf);
-+
-+ out:
-+ path_release(nd);
-+ TraceErr(err);
-+ return ERR_PTR(err);
-+}
-+
-+static void aufs_put_link(struct dentry *dentry, struct nameidata *nd,
-+ void *cookie)
-+{
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ __putname(nd_get_link(nd));
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+#if 0 // comment
-+struct inode_operations {
-+ int (*create) (struct inode *,struct dentry *,int, struct nameidata *);
-+ struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
-+ int (*link) (struct dentry *,struct inode *,struct dentry *);
-+ int (*unlink) (struct inode *,struct dentry *);
-+ int (*symlink) (struct inode *,struct dentry *,const char *);
-+ int (*mkdir) (struct inode *,struct dentry *,int);
-+ int (*rmdir) (struct inode *,struct dentry *);
-+ int (*mknod) (struct inode *,struct dentry *,int,dev_t);
-+ int (*rename) (struct inode *, struct dentry *,
-+ struct inode *, struct dentry *);
-+ int (*readlink) (struct dentry *, char __user *,int);
-+ void * (*follow_link) (struct dentry *, struct nameidata *);
-+ void (*put_link) (struct dentry *, struct nameidata *, void *);
-+ void (*truncate) (struct inode *);
-+ int (*permission) (struct inode *, int, struct nameidata *);
-+ int (*setattr) (struct dentry *, struct iattr *);
-+ int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
-+ int (*setxattr) (struct dentry *, const char *,const void *,size_t,int);
-+ ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
-+ ssize_t (*listxattr) (struct dentry *, char *, size_t);
-+ int (*removexattr) (struct dentry *, const char *);
-+ void (*truncate_range)(struct inode *, loff_t, loff_t);
-+};
-+#endif
-+
-+struct inode_operations aufs_symlink_iop = {
-+ .permission = aufs_permission,
-+ .setattr = aufs_setattr,
-+
-+ .readlink = aufs_readlink,
-+ .follow_link = aufs_follow_link,
-+ .put_link = aufs_put_link
-+};
-+
-+//i_op_add.c
-+int aufs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev);
-+int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname);
-+int aufs_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd);
-+int aufs_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry);
-+int aufs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
-+
-+//i_op_del.c
-+int aufs_unlink(struct inode *dir, struct dentry *dentry);
-+int aufs_rmdir(struct inode *dir, struct dentry *dentry);
-+
-+// i_op_ren.c
-+int aufs_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry);
-+
-+struct inode_operations aufs_dir_iop = {
-+ .create = aufs_create,
-+ .lookup = aufs_lookup,
-+ .link = aufs_link,
-+ .unlink = aufs_unlink,
-+ .symlink = aufs_symlink,
-+ .mkdir = aufs_mkdir,
-+ .rmdir = aufs_rmdir,
-+ .mknod = aufs_mknod,
-+ .rename = aufs_rename,
-+
-+ .permission = aufs_permission,
-+ .setattr = aufs_setattr,
-+
-+#if 0 // xattr
-+ .setxattr = aufs_setxattr,
-+ .getxattr = aufs_getxattr,
-+ .listxattr = aufs_listxattr,
-+ .removexattr = aufs_removexattr
-+#endif
-+};
-+
-+struct inode_operations aufs_iop = {
-+ .permission = aufs_permission,
-+ .setattr = aufs_setattr,
-+
-+#if 0 // xattr
-+ .setxattr = aufs_setxattr,
-+ .getxattr = aufs_getxattr,
-+ .listxattr = aufs_listxattr,
-+ .removexattr = aufs_removexattr
-+#endif
-+};
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/i_op_add.c linux-2.6.22.1/fs/aufs/i_op_add.c
---- linux-2.6.22.1.oorig/fs/aufs/i_op_add.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/i_op_add.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,621 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: i_op_add.c,v 1.37 2007/05/07 03:46:08 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include "aufs.h"
-+
-+/*
-+ * final procedure of adding a new entry, except link(2).
-+ * remove whiteout, instantiate, copyup the parent dir's times and size
-+ * and update version.
-+ * if it failed, re-create the removed whiteout.
-+ */
-+static int epilog(struct dentry *wh_dentry, struct dentry *dentry)
-+{
-+ int err, rerr;
-+ aufs_bindex_t bwh;
-+ struct inode *inode, *dir;
-+ struct dentry *wh;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("wh %p, %.*s\n", wh_dentry, DLNPair(dentry));
-+
-+ lkup.dlgt = need_dlgt(dentry->d_sb);
-+ bwh = -1;
-+ if (wh_dentry) {
-+ bwh = dbwh(dentry);
-+ err = au_unlink_wh_dentry(wh_dentry->d_parent->d_inode,
-+ wh_dentry, dentry, lkup.dlgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+ }
-+
-+ inode = au_new_inode(dentry);
-+ //inode = ERR_PTR(-1);
-+ if (!IS_ERR(inode)) {
-+ d_instantiate(dentry, inode);
-+ dir = dentry->d_parent->d_inode;
-+ /* or always cpup dir mtime? */
-+ if (ibstart(dir) == dbstart(dentry))
-+ au_cpup_attr_timesizes(dir);
-+ dir->i_version++;
-+ return 0; /* success */
-+ }
-+
-+ err = PTR_ERR(inode);
-+ if (!wh_dentry)
-+ goto out;
-+
-+ /* revert */
-+ lkup.nfsmnt = au_nfsmnt(dentry->d_sb, bwh);
-+ wh = simple_create_wh(dentry, bwh, wh_dentry->d_parent, &lkup);
-+ //wh = ERR_PTR(-1);
-+ rerr = PTR_ERR(wh);
-+ if (!IS_ERR(wh)) {
-+ dput(wh);
-+ goto out;
-+ }
-+ IOErr("%.*s reverting whiteout failed(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * initial procedure of adding a new entry.
-+ * prepare writable branch and the parent dir, lock it,
-+ * lookup whiteout for the new entry.
-+ */
-+static struct dentry *
-+lock_hdir_lkup_wh(struct dentry *dentry, struct dtime *dt,
-+ struct dentry *src_dentry, int do_lock_srcdir)
-+{
-+ struct dentry *wh_dentry, *parent, *hidden_parent;
-+ int err;
-+ aufs_bindex_t bstart, bcpup;
-+ struct inode *dir, *h_dir;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, src %p\n", DLNPair(dentry), src_dentry);
-+
-+ parent = dentry->d_parent;
-+ bstart = dbstart(dentry);
-+ bcpup = err = wr_dir(dentry, 1, src_dentry, -1, do_lock_srcdir);
-+ //err = -1;
-+ wh_dentry = ERR_PTR(err);
-+ if (unlikely(err < 0))
-+ goto out;
-+
-+ dir = parent->d_inode;
-+ hidden_parent = au_h_dptr_i(parent, bcpup);
-+ h_dir = hidden_parent->d_inode;
-+ hdir_lock(h_dir, dir, bcpup);
-+ if (dt)
-+ dtime_store(dt, parent, hidden_parent);
-+ if (/* bcpup != bstart || */ bcpup != dbwh(dentry))
-+ return NULL; /* success */
-+
-+ lkup.nfsmnt = au_nfsmnt(parent->d_sb, bcpup);
-+ lkup.dlgt = need_dlgt(parent->d_sb);
-+ wh_dentry = lkup_wh(hidden_parent, &dentry->d_name, &lkup);
-+ //wh_dentry = ERR_PTR(-1);
-+ if (IS_ERR(wh_dentry))
-+ hdir_unlock(h_dir, dir, bcpup);
-+
-+ out:
-+ TraceErrPtr(wh_dentry);
-+ return wh_dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+enum {Mknod, Symlink, Creat};
-+struct simple_arg {
-+ int type;
-+ union {
-+ struct {
-+ int mode;
-+ struct nameidata *nd;
-+ } c;
-+ struct {
-+ const char *symname;
-+ } s;
-+ struct {
-+ int mode;
-+ dev_t dev;
-+ } m;
-+ } u;
-+};
-+
-+static int add_simple(struct inode *dir, struct dentry *dentry,
-+ struct simple_arg *arg)
-+{
-+ int err, dlgt;
-+ struct dentry *hidden_dentry, *hidden_parent, *wh_dentry, *parent;
-+ struct inode *hidden_dir;
-+ struct dtime dt;
-+
-+ LKTRTrace("type %d, %.*s\n", arg->type, DLNPair(dentry));
-+ IMustLock(dir);
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ parent = dentry->d_parent;
-+ di_write_lock_parent(parent);
-+ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, /*src_dentry*/NULL,
-+ /*do_lock_srcdir*/0);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ hidden_dentry = au_h_dptr(dentry);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ dlgt = need_dlgt(dir->i_sb);
-+
-+#if 1 // partial testing
-+ switch (arg->type) {
-+ case Creat:
-+#if 0
-+ if (arg->u.c.nd) {
-+ struct nameidata fake_nd;
-+ fake_nd = *arg->u.c.nd;
-+ fake_nd.dentry = dget(hidden_parent);
-+ fake_nd.mnt = sbr_mnt(dentry->d_sb, dbstart(dentry));
-+ mntget(fake_nd.mnt);
-+ err = vfsub_create(hidden_dir, hidden_dentry,
-+ arg->u.c.mode, &fake_nd, dlgt);
-+ path_release(&fake_nd);
-+ } else
-+#endif
-+ err = vfsub_create(hidden_dir, hidden_dentry,
-+ arg->u.c.mode, NULL, dlgt);
-+ break;
-+ case Symlink:
-+ err = vfsub_symlink(hidden_dir, hidden_dentry,
-+ arg->u.s.symname, S_IALLUGO, dlgt);
-+ break;
-+ case Mknod:
-+ err = vfsub_mknod(hidden_dir, hidden_dentry,
-+ arg->u.m.mode, arg->u.m.dev, dlgt);
-+ break;
-+ default:
-+ BUG();
-+ }
-+#else
-+ err = -1;
-+#endif
-+ if (!err)
-+ err = epilog(wh_dentry, dentry);
-+ //err = -1;
-+
-+ /* revert */
-+ if (unlikely(err && hidden_dentry->d_inode)) {
-+ int rerr;
-+ rerr = vfsub_unlink(hidden_dir, hidden_dentry, dlgt);
-+ //rerr = -1;
-+ if (rerr) {
-+ IOErr("%.*s revert failure(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+ }
-+ dtime_revert(&dt, !CPUP_LOCKED_GHDIR);
-+ d_drop(dentry);
-+ }
-+
-+ hdir_unlock(hidden_dir, dir, dbstart(dentry));
-+ dput(wh_dentry);
-+
-+ out:
-+ if (unlikely(err)) {
-+ au_update_dbstart(dentry);
-+ d_drop(dentry);
-+ }
-+ di_write_unlock(parent);
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
-+{
-+ struct simple_arg arg = {
-+ .type = Mknod,
-+ .u.m = {.mode = mode, .dev = dev}
-+ };
-+ return add_simple(dir, dentry, &arg);
-+}
-+
-+int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
-+{
-+ struct simple_arg arg = {
-+ .type = Symlink,
-+ .u.s.symname = symname
-+ };
-+ return add_simple(dir, dentry, &arg);
-+}
-+
-+int aufs_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd)
-+{
-+ struct simple_arg arg = {
-+ .type = Creat,
-+ .u.c = {.mode = mode, .nd = nd}
-+ };
-+ return add_simple(dir, dentry, &arg);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct link_arg {
-+ aufs_bindex_t bdst, bsrc;
-+ int issamedir, dlgt;
-+ struct dentry *src_parent, *parent, *hidden_dentry;
-+ struct inode *hidden_dir, *inode;
-+};
-+
-+static int cpup_before_link(struct dentry *src_dentry, struct inode *dir,
-+ struct link_arg *a)
-+{
-+ int err;
-+ unsigned int flags;
-+ struct inode *hi, *hdir = NULL, *src_dir;
-+
-+ TraceEnter();
-+
-+ err = 0;
-+ flags = au_flags_cpup(CPUP_DTIME, a->parent);
-+ src_dir = a->src_parent->d_inode;
-+ if (!a->issamedir) {
-+ // todo: dead lock?
-+ di_read_lock_parent2(a->src_parent, AUFS_I_RLOCK);
-+ // this temporary unlock/lock is safe
-+ hdir_unlock(a->hidden_dir, dir, a->bdst);
-+ err = test_and_cpup_dirs(src_dentry, a->bdst, a->parent);
-+ //err = -1;
-+ if (!err) {
-+ hdir = au_h_iptr_i(src_dir, a->bdst);
-+ hdir_lock(hdir, src_dir, a->bdst);
-+ flags = au_flags_cpup(CPUP_DTIME, a->src_parent);
-+ }
-+ }
-+
-+ if (!err) {
-+ hi = au_h_dptr(src_dentry)->d_inode;
-+ hi_lock_child(hi);
-+ err = sio_cpup_simple(src_dentry, a->bdst, -1, flags);
-+ //err = -1;
-+ i_unlock(hi);
-+ }
-+
-+ if (!a->issamedir) {
-+ if (hdir)
-+ hdir_unlock(hdir, src_dir, a->bdst);
-+ hdir_lock(a->hidden_dir, dir, a->bdst);
-+ di_read_unlock(a->src_parent, AUFS_I_RLOCK);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int cpup_or_link(struct dentry *src_dentry, struct link_arg *a)
-+{
-+ int err;
-+ struct inode *inode, *h_inode, *h_dst_inode;
-+ struct dentry *h_dentry;
-+ aufs_bindex_t bstart;
-+ struct super_block *sb;
-+
-+ TraceEnter();
-+
-+ sb = src_dentry->d_sb;
-+ inode = src_dentry->d_inode;
-+ h_dentry = au_h_dptr(src_dentry);
-+ h_inode = h_dentry->d_inode;
-+ bstart = ibstart(inode);
-+ h_dst_inode = NULL;
-+ if (bstart <= a->bdst)
-+ h_dst_inode = au_h_iptr_i(inode, a->bdst);
-+
-+ if (!h_dst_inode) {
-+ /* copyup src_dentry as the name of dentry. */
-+ set_dbstart(src_dentry, a->bdst);
-+ set_h_dptr(src_dentry, a->bdst, dget(a->hidden_dentry));
-+ hi_lock_child(h_inode);
-+ err = sio_cpup_single(src_dentry, a->bdst, a->bsrc, -1,
-+ au_flags_cpup(!CPUP_DTIME, a->parent));
-+ //err = -1;
-+ i_unlock(h_inode);
-+ set_h_dptr(src_dentry, a->bdst, NULL);
-+ set_dbstart(src_dentry, a->bsrc);
-+ } else {
-+ /* the inode of src_dentry already exists on a.bdst branch */
-+ h_dentry = d_find_alias(h_dst_inode);
-+ if (h_dentry) {
-+ err = vfsub_link(h_dentry, a->hidden_dir,
-+ a->hidden_dentry, a->dlgt);
-+ dput(h_dentry);
-+ } else {
-+ IOErr("no dentry found for i%lu on b%d\n",
-+ h_dst_inode->i_ino, a->bdst);
-+ err = -EIO;
-+ }
-+ }
-+
-+ if (!err)
-+ append_plink(sb, a->inode, a->hidden_dentry, a->bdst);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry)
-+{
-+ int err, rerr;
-+ struct dentry *hidden_parent, *wh_dentry, *hidden_src_dentry;
-+ struct dtime dt;
-+ struct link_arg a;
-+ struct super_block *sb;
-+
-+ LKTRTrace("src %.*s, i%lu, dst %.*s\n",
-+ DLNPair(src_dentry), dir->i_ino, DLNPair(dentry));
-+ IMustLock(dir);
-+ IMustLock(src_dentry->d_inode);
-+
-+ aufs_read_and_write_lock2(dentry, src_dentry, /*isdir*/0);
-+ a.src_parent = src_dentry->d_parent;
-+ a.parent = dentry->d_parent;
-+ a.issamedir = (a.src_parent == a.parent);
-+ di_write_lock_parent(a.parent);
-+ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, src_dentry, !a.issamedir);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ a.inode = src_dentry->d_inode;
-+ a.hidden_dentry = au_h_dptr(dentry);
-+ hidden_parent = a.hidden_dentry->d_parent;
-+ a.hidden_dir = hidden_parent->d_inode;
-+ IMustLock(a.hidden_dir);
-+
-+ err = 0;
-+ sb = dentry->d_sb;
-+ a.dlgt = need_dlgt(sb);
-+
-+ //todo: minor optimize, their sb may be same while their bindex differs.
-+ a.bsrc = dbstart(src_dentry);
-+ a.bdst = dbstart(dentry);
-+ hidden_src_dentry = au_h_dptr(src_dentry);
-+ if (unlikely(!au_flag_test(sb, AuFlag_PLINK))) {
-+ /*
-+ * copyup src_dentry to the branch we process,
-+ * and then link(2) to it.
-+ * gave up 'pseudo link by cpup' approach,
-+ * since nlink may be one and some applications will not work.
-+ */
-+ if (a.bdst < a.bsrc
-+ /* && hidden_src_dentry->d_sb != a.hidden_dentry->d_sb */)
-+ err = cpup_before_link(src_dentry, dir, &a);
-+ if (!err) {
-+ hidden_src_dentry = au_h_dptr(src_dentry);
-+ err = vfsub_link(hidden_src_dentry, a.hidden_dir,
-+ a.hidden_dentry, a.dlgt);
-+ //err = -1;
-+ }
-+ } else {
-+ if (a.bdst < a.bsrc
-+ /* && hidden_src_dentry->d_sb != a.hidden_dentry->d_sb */)
-+ err = cpup_or_link(src_dentry, &a);
-+ else {
-+ hidden_src_dentry = au_h_dptr(src_dentry);
-+ err = vfsub_link(hidden_src_dentry, a.hidden_dir,
-+ a.hidden_dentry, a.dlgt);
-+ //err = -1;
-+ }
-+ }
-+ if (unlikely(err))
-+ goto out_unlock;
-+ if (wh_dentry) {
-+ err = au_unlink_wh_dentry(a.hidden_dir, wh_dentry, dentry,
-+ a.dlgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_revert;
-+ }
-+
-+ dir->i_version++;
-+ if (ibstart(dir) == dbstart(dentry))
-+ au_cpup_attr_timesizes(dir);
-+ if (!d_unhashed(a.hidden_dentry)
-+ /* || hidden_old_inode->i_nlink <= nlink */
-+ /* || SB_NFS(hidden_src_dentry->d_sb) */) {
-+ dentry->d_inode = igrab(a.inode);
-+ d_instantiate(dentry, a.inode);
-+ a.inode->i_nlink++;
-+ a.inode->i_ctime = dir->i_ctime;
-+ } else
-+ /* nfs case (< 2.6.15) */
-+ d_drop(dentry);
-+#if 0
-+ au_debug_on();
-+ DbgInode(a.inode);
-+ au_debug_off();
-+ {
-+ aufs_bindex_t i;
-+ for (i = ibstart(a.inode); i <= ibend(a.inode); i++) {
-+ struct xino xino;
-+ struct inode *hi;
-+ hi = au_h_iptr_i(a.inode, i);
-+ if (hi) {
-+ xino_read(sb, i, hi->i_ino, &xino);
-+ Dbg("hi%lu, i%lu\n", hi->i_ino, xino.ino);
-+ }
-+ }
-+ }
-+#endif
-+ goto out_unlock; /* success */
-+
-+ out_revert:
-+#if 0 // remove
-+ if (d_unhashed(a.hidden_dentry)) {
-+ /* hardlink on nfs (< 2.6.15) */
-+ struct dentry *d;
-+ const struct qstr *name = &a.hidden_dentry->d_name;
-+ DEBUG_ON(a.hidden_dentry->d_parent->d_inode != a.hidden_dir);
-+ // do not superio.
-+ d = lkup_one(name->name, a.hidden_dentry->d_parent, name->len,
-+ au_nfsmnt(sb, a.bdst)??, need_dlgt(sb));
-+ rerr = PTR_ERR(d);
-+ if (IS_ERR(d))
-+ goto out_rerr;
-+ dput(a.hidden_dentry);
-+ a.hidden_dentry = d;
-+ DEBUG_ON(!d->d_inode);
-+ }
-+#endif
-+ rerr = vfsub_unlink(a.hidden_dir, a.hidden_dentry, a.dlgt);
-+ //rerr = -1;
-+ if (!rerr)
-+ goto out_dt;
-+// out_rerr:
-+ IOErr("%.*s reverting failed(%d, %d)\n", DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+ out_dt:
-+ d_drop(dentry);
-+ dtime_revert(&dt, !CPUP_LOCKED_GHDIR);
-+ out_unlock:
-+ hdir_unlock(a.hidden_dir, dir, a.bdst);
-+ dput(wh_dentry);
-+ out:
-+ if (unlikely(err)) {
-+ au_update_dbstart(dentry);
-+ d_drop(dentry);
-+ }
-+ di_write_unlock(a.parent);
-+ aufs_read_and_write_unlock2(dentry, src_dentry);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-+{
-+ int err, rerr, diropq, dlgt;
-+ struct dentry *hidden_dentry, *hidden_parent, *wh_dentry, *parent,
-+ *opq_dentry;
-+ struct inode *hidden_dir, *hidden_inode;
-+ struct dtime dt;
-+ aufs_bindex_t bindex;
-+ struct super_block *sb;
-+
-+ LKTRTrace("i%lu, %.*s, mode 0%o\n", dir->i_ino, DLNPair(dentry), mode);
-+ IMustLock(dir);
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ parent = dentry->d_parent;
-+ di_write_lock_parent(parent);
-+ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, /*src_dentry*/NULL,
-+ /*do_lock_srcdir*/0);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ sb = dentry->d_sb;
-+ bindex = dbstart(dentry);
-+ hidden_dentry = au_h_dptr(dentry);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ dlgt = need_dlgt(sb);
-+
-+ err = vfsub_mkdir(hidden_dir, hidden_dentry, mode, dlgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_unlock;
-+ hidden_inode = hidden_dentry->d_inode;
-+
-+ /* make the dir opaque */
-+ diropq = 0;
-+ if (unlikely(wh_dentry || au_flag_test(sb, AuFlag_ALWAYS_DIROPQ))) {
-+ hi_lock_child(hidden_inode);
-+ opq_dentry = create_diropq(dentry, bindex, dlgt);
-+ //opq_dentry = ERR_PTR(-1);
-+ i_unlock(hidden_inode);
-+ err = PTR_ERR(opq_dentry);
-+ if (IS_ERR(opq_dentry))
-+ goto out_dir;
-+ dput(opq_dentry);
-+ diropq = 1;
-+ }
-+
-+ err = epilog(wh_dentry, dentry);
-+ //err = -1;
-+ if (!err) {
-+ dir->i_nlink++;
-+ goto out_unlock; /* success */
-+ }
-+
-+ /* revert */
-+ if (unlikely(diropq)) {
-+ LKTRLabel(revert opq);
-+ hi_lock_child(hidden_inode);
-+ rerr = remove_diropq(dentry, bindex, dlgt);
-+ //rerr = -1;
-+ i_unlock(hidden_inode);
-+ if (rerr) {
-+ IOErr("%.*s reverting diropq failed(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+ }
-+ }
-+
-+ out_dir:
-+ LKTRLabel(revert dir);
-+ rerr = vfsub_rmdir(hidden_dir, hidden_dentry, dlgt);
-+ //rerr = -1;
-+ if (rerr) {
-+ IOErr("%.*s reverting dir failed(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ err = -EIO;
-+ }
-+ d_drop(dentry);
-+ dtime_revert(&dt, /*fake flag*/CPUP_LOCKED_GHDIR);
-+ out_unlock:
-+ hdir_unlock(hidden_dir, dir, bindex);
-+ dput(wh_dentry);
-+ out:
-+ if (unlikely(err)) {
-+ au_update_dbstart(dentry);
-+ d_drop(dentry);
-+ }
-+ di_write_unlock(parent);
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/i_op_del.c linux-2.6.22.1/fs/aufs/i_op_del.c
---- linux-2.6.22.1.oorig/fs/aufs/i_op_del.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/i_op_del.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,414 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: i_op_del.c,v 1.35 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+/* returns,
-+ * 0: wh is unnecessary
-+ * plus: wh is necessary
-+ * minus: error
-+ */
-+int wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup,
-+ struct dentry *locked)
-+{
-+ int need_wh, err;
-+ aufs_bindex_t bstart;
-+ struct dentry *hidden_dentry;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, isdir %d, *bcpup %d, locked %p\n",
-+ DLNPair(dentry), isdir, *bcpup, locked);
-+ sb = dentry->d_sb;
-+
-+ bstart = dbstart(dentry);
-+ LKTRTrace("bcpup %d, bstart %d\n", *bcpup, bstart);
-+ hidden_dentry = au_h_dptr(dentry);
-+ if (*bcpup < 0) {
-+ *bcpup = bstart;
-+ if (test_ro(sb, bstart, dentry->d_inode)) {
-+ *bcpup = err = find_rw_parent_br(dentry, bstart);
-+ //*bcpup = err = find_rw_br(sb, bstart);
-+ //err = -1;
-+ if (unlikely(err < 0))
-+ goto out;
-+ }
-+ } else {
-+ /* braces are added to stop a warning */
-+ DEBUG_ON(bstart < *bcpup
-+ || test_ro(sb, *bcpup, dentry->d_inode));
-+ }
-+ LKTRTrace("bcpup %d, bstart %d\n", *bcpup, bstart);
-+
-+ if (*bcpup != bstart) {
-+ err = cpup_dirs(dentry, *bcpup, locked);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out;
-+ need_wh = 1;
-+ } else {
-+ //struct nameidata nd;
-+ aufs_bindex_t old_bend, new_bend, bdiropq = -1;
-+ old_bend = dbend(dentry);
-+ if (isdir) {
-+ bdiropq = dbdiropq(dentry);
-+ set_dbdiropq(dentry, -1);
-+ }
-+ err = need_wh = lkup_dentry(dentry, bstart + 1, /*type*/0);
-+ //err = -1;
-+ if (isdir)
-+ set_dbdiropq(dentry, bdiropq);
-+ if (unlikely(err < 0))
-+ goto out;
-+ new_bend = dbend(dentry);
-+ if (!need_wh && old_bend != new_bend) {
-+ set_h_dptr(dentry, new_bend, NULL);
-+ set_dbend(dentry, old_bend);
-+#if 0
-+ } else if (!au_h_dptr_i(dentry, new_bend)->d_inode) {
-+ LKTRTrace("negative\n");
-+ set_h_dptr(dentry, new_bend, NULL);
-+ set_dbend(dentry, old_bend);
-+ need_wh = 0;
-+#endif
-+ }
-+ }
-+ LKTRTrace("need_wh %d\n", need_wh);
-+ err = need_wh;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static struct dentry *
-+lock_hdir_create_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup,
-+ struct dtime *dt)
-+{
-+ struct dentry *wh_dentry;
-+ int err, need_wh;
-+ struct dentry *hidden_parent, *parent;
-+ struct inode *dir, *h_dir;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, isdir %d\n", DLNPair(dentry), isdir);
-+
-+ err = need_wh = wr_dir_need_wh(dentry, isdir, bcpup, NULL);
-+ //err = -1;
-+ wh_dentry = ERR_PTR(err);
-+ if (unlikely(err < 0))
-+ goto out;
-+
-+ parent = dentry->d_parent;
-+ dir = parent->d_inode;
-+ hidden_parent = au_h_dptr_i(parent, *bcpup);
-+ h_dir = hidden_parent->d_inode;
-+ hdir_lock(h_dir, dir, *bcpup);
-+ dtime_store(dt, parent, hidden_parent);
-+ if (!need_wh)
-+ return NULL; /* success, no need to create whiteout */
-+
-+ lkup.nfsmnt = au_nfsmnt(dentry->d_sb, *bcpup);
-+ lkup.dlgt = need_dlgt(dentry->d_sb);
-+ wh_dentry = simple_create_wh(dentry, *bcpup, hidden_parent, &lkup);
-+ //wh_dentry = ERR_PTR(-1);
-+ if (!IS_ERR(wh_dentry))
-+ goto out; /* success */
-+ /* returns with the parent is locked and wh_dentry is DGETed */
-+
-+ hdir_unlock(h_dir, dir, *bcpup);
-+
-+ out:
-+ TraceErrPtr(wh_dentry);
-+ return wh_dentry;
-+}
-+
-+static int renwh_and_rmdir(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct aufs_nhash *whlist, struct inode *dir)
-+{
-+ int rmdir_later, err;
-+ struct dentry *hidden_dentry;
-+
-+ LKTRTrace("%.*s, b%d\n", DLNPair(dentry), bindex);
-+
-+ err = rename_whtmp(dentry, bindex);
-+ //err = -1;
-+#if 0
-+ //todo: bug
-+ if (unlikely(err)) {
-+ au_direval_inc(dentry->d_parent);
-+ return err;
-+ }
-+#endif
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!au_is_nfs(hidden_dentry->d_sb)) {
-+ const int dirwh = stosi(dentry->d_sb)->si_dirwh;
-+ rmdir_later = (dirwh <= 1);
-+ if (!rmdir_later)
-+ rmdir_later = is_longer_wh(whlist, bindex, dirwh);
-+ if (rmdir_later)
-+ return rmdir_later;
-+ }
-+
-+ err = rmdir_whtmp(hidden_dentry, whlist, bindex, dir, dentry->d_inode);
-+ //err = -1;
-+ if (unlikely(err)) {
-+ IOErr("rmdir %.*s, b%d failed, %d. ignored\n",
-+ DLNPair(hidden_dentry), bindex, err);
-+ err = 0;
-+ }
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static void epilog(struct inode *dir, struct dentry *dentry,
-+ aufs_bindex_t bindex)
-+{
-+ d_drop(dentry);
-+ dentry->d_inode->i_ctime = dir->i_ctime;
-+ if (atomic_read(&dentry->d_count) == 1) {
-+ set_h_dptr(dentry, dbstart(dentry), NULL);
-+ au_update_dbstart(dentry);
-+ }
-+ if (ibstart(dir) == bindex)
-+ au_cpup_attr_timesizes(dir);
-+ dir->i_version++;
-+}
-+
-+static int do_revert(int err, struct dentry *wh_dentry, struct dentry *dentry,
-+ aufs_bindex_t bwh, struct dtime *dt, int dlgt)
-+{
-+ int rerr;
-+
-+ rerr = au_unlink_wh_dentry(wh_dentry->d_parent->d_inode, wh_dentry,
-+ dentry, dlgt);
-+ //rerr = -1;
-+ if (!rerr) {
-+ set_dbwh(dentry, bwh);
-+ dtime_revert(dt, !CPUP_LOCKED_GHDIR);
-+ return 0;
-+ }
-+
-+ IOErr("%.*s reverting whiteout failed(%d, %d)\n",
-+ DLNPair(dentry), err, rerr);
-+ return -EIO;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int aufs_unlink(struct inode *dir, struct dentry *dentry)
-+{
-+ int err, dlgt;
-+ struct inode *inode, *hidden_dir;
-+ struct dentry *parent, *wh_dentry, *hidden_dentry, *hidden_parent;
-+ struct dtime dt;
-+ aufs_bindex_t bwh, bindex, bstart;
-+ struct super_block *sb;
-+
-+ LKTRTrace("i%lu, %.*s\n", dir->i_ino, DLNPair(dentry));
-+ IMustLock(dir);
-+ inode = dentry->d_inode;
-+ if (unlikely(!inode))
-+ return -ENOENT; // possible?
-+ IMustLock(inode);
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ parent = dentry->d_parent;
-+ di_write_lock_parent(parent);
-+
-+ bstart = dbstart(dentry);
-+ bwh = dbwh(dentry);
-+ bindex = -1;
-+ wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/0, &bindex, &dt);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ sb = dir->i_sb;
-+ dlgt = need_dlgt(sb);
-+ hidden_dentry = au_h_dptr(dentry);
-+ dget(hidden_dentry);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+
-+ if (bindex == bstart) {
-+ err = vfsub_unlink(hidden_dir, hidden_dentry, dlgt);
-+ //err = -1;
-+ } else {
-+ DEBUG_ON(!wh_dentry);
-+ hidden_parent = wh_dentry->d_parent;
-+ DEBUG_ON(hidden_parent != au_h_dptr_i(parent, bindex));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ err = 0;
-+ }
-+
-+ if (!err) {
-+ inode->i_nlink--;
-+ epilog(dir, dentry, bindex);
-+#if 0
-+ xino_write0(sb, bstart, hidden_dentry->d_inode->i_ino);
-+ /* ignore this error */
-+#endif
-+ goto out_unlock; /* success */
-+ }
-+
-+ /* revert */
-+ if (wh_dentry) {
-+ int rerr;
-+ rerr = do_revert(err, wh_dentry, dentry, bwh, &dt, dlgt);
-+ if (rerr)
-+ err = rerr;
-+ }
-+
-+ out_unlock:
-+ hdir_unlock(hidden_dir, dir, bindex);
-+ dput(wh_dentry);
-+ dput(hidden_dentry);
-+ out:
-+ di_write_unlock(parent);
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_rmdir(struct inode *dir, struct dentry *dentry)
-+{
-+ int err, rmdir_later;
-+ struct inode *inode, *hidden_dir;
-+ struct dentry *parent, *wh_dentry, *hidden_dentry, *hidden_parent;
-+ struct dtime dt;
-+ aufs_bindex_t bwh, bindex, bstart;
-+ struct rmdir_whtmp_arg *arg;
-+ struct aufs_nhash *whlist;
-+ struct super_block *sb;
-+
-+ LKTRTrace("i%lu, %.*s\n", dir->i_ino, DLNPair(dentry));
-+ IMustLock(dir);
-+ inode = dentry->d_inode;
-+ if (unlikely(!inode))
-+ return -ENOENT; // possible?
-+ IMustLock(inode);
-+
-+ whlist = nhash_new(GFP_KERNEL);
-+ err = PTR_ERR(whlist);
-+ if (IS_ERR(whlist))
-+ goto out;
-+
-+ err = -ENOMEM;
-+ arg = kmalloc(sizeof(*arg), GFP_KERNEL);
-+ //arg = NULL;
-+ if (unlikely(!arg))
-+ goto out_whlist;
-+
-+ aufs_read_lock(dentry, AUFS_D_WLOCK);
-+ parent = dentry->d_parent;
-+ di_write_lock_parent(parent);
-+ err = test_empty(dentry, whlist);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_arg;
-+
-+ bstart = dbstart(dentry);
-+ bwh = dbwh(dentry);
-+ bindex = -1;
-+ wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/ 1, &bindex, &dt);
-+ //wh_dentry = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out_arg;
-+
-+ hidden_dentry = au_h_dptr(dentry);
-+ dget(hidden_dentry);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+
-+ rmdir_later = 0;
-+ if (bindex == bstart) {
-+ IMustLock(hidden_dir);
-+ err = renwh_and_rmdir(dentry, bstart, whlist, dir);
-+ //err = -1;
-+ if (err > 0) {
-+ rmdir_later = err;
-+ err = 0;
-+ }
-+ } else {
-+ DEBUG_ON(!wh_dentry);
-+ hidden_parent = wh_dentry->d_parent;
-+ DEBUG_ON(hidden_parent != au_h_dptr_i(parent, bindex));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ err = 0;
-+ }
-+
-+ sb = dentry->d_sb;
-+ if (!err) {
-+ //aufs_bindex_t bi, bend;
-+
-+ au_reset_hinotify(inode, /*flags*/0);
-+ inode->i_nlink = 0;
-+ set_dbdiropq(dentry, -1);
-+ epilog(dir, dentry, bindex);
-+
-+ if (rmdir_later) {
-+ kick_rmdir_whtmp(hidden_dentry, whlist, bstart, dir,
-+ inode, arg);
-+ arg = NULL;
-+ }
-+
-+#if 0
-+ bend = dbend(dentry);
-+ for (bi = bstart; bi <= bend; bi++) {
-+ struct dentry *hd;
-+ hd = au_h_dptr_i(dentry, bi);
-+ if (hd && hd->d_inode)
-+ xino_write0(sb, bi, hd->d_inode->i_ino);
-+ /* ignore this error */
-+ }
-+#endif
-+
-+ goto out_unlock; /* success */
-+ }
-+
-+ /* revert */
-+ LKTRLabel(revert);
-+ if (wh_dentry) {
-+ int rerr;
-+ rerr = do_revert(err, wh_dentry, dentry, bwh, &dt,
-+ need_dlgt(sb));
-+ if (rerr)
-+ err = rerr;
-+ }
-+
-+ out_unlock:
-+ hdir_unlock(hidden_dir, dir, bindex);
-+ dput(wh_dentry);
-+ dput(hidden_dentry);
-+ out_arg:
-+ di_write_unlock(parent);
-+ aufs_read_unlock(dentry, AUFS_D_WLOCK);
-+ kfree(arg);
-+ out_whlist:
-+ nhash_del(whlist);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/i_op_ren.c linux-2.6.22.1/fs/aufs/i_op_ren.c
---- linux-2.6.22.1.oorig/fs/aufs/i_op_ren.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/i_op_ren.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,637 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: i_op_ren.c,v 1.39 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+#include "aufs.h"
-+
-+enum {SRC, DST};
-+struct rename_args {
-+ struct dentry *hidden_dentry[2], *parent[2], *hidden_parent[2];
-+ struct aufs_nhash whlist;
-+ aufs_bindex_t btgt, bstart[2];
-+ struct super_block *sb;
-+
-+ unsigned int isdir:1;
-+ unsigned int issamedir:1;
-+ unsigned int whsrc:1;
-+ unsigned int whdst:1;
-+ unsigned int dlgt:1;
-+} __attribute__((aligned(sizeof(long))));
-+
-+static int do_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry,
-+ struct rename_args *a)
-+{
-+ int err, need_diropq, bycpup, rerr;
-+ struct rmdir_whtmp_arg *tharg;
-+ struct dentry *wh_dentry[2], *hidden_dst, *hg_parent;
-+ struct inode *hidden_dir[2];
-+ aufs_bindex_t bindex, bend;
-+ unsigned int flags;
-+ struct lkup_args lkup = {.dlgt = a->dlgt};
-+
-+ LKTRTrace("%.*s/%.*s, %.*s/%.*s, "
-+ "hd{%p, %p}, hp{%p, %p}, wh %p, btgt %d, bstart{%d, %d}, "
-+ "flags{%d, %d, %d, %d}\n",
-+ DLNPair(a->parent[SRC]), DLNPair(src_dentry),
-+ DLNPair(a->parent[DST]), DLNPair(dentry),
-+ a->hidden_dentry[SRC], a->hidden_dentry[DST],
-+ a->hidden_parent[SRC], a->hidden_parent[DST],
-+ &a->whlist, a->btgt,
-+ a->bstart[SRC], a->bstart[DST],
-+ a->isdir, a->issamedir, a->whsrc, a->whdst);
-+ hidden_dir[SRC] = a->hidden_parent[SRC]->d_inode;
-+ hidden_dir[DST] = a->hidden_parent[DST]->d_inode;
-+ IMustLock(hidden_dir[SRC]);
-+ IMustLock(hidden_dir[DST]);
-+
-+ /* prepare workqueue arg */
-+ hidden_dst = NULL;
-+ tharg = NULL;
-+ if (a->isdir && a->hidden_dentry[DST]->d_inode) {
-+ err = -ENOMEM;
-+ tharg = kmalloc(sizeof(*tharg), GFP_KERNEL);
-+ //tharg = NULL;
-+ if (unlikely(!tharg))
-+ goto out;
-+ hidden_dst = dget(a->hidden_dentry[DST]);
-+ }
-+
-+ wh_dentry[SRC] = wh_dentry[DST] = NULL;
-+ lkup.nfsmnt = au_nfsmnt(a->sb, a->btgt);
-+ /* create whiteout for src_dentry */
-+ if (a->whsrc) {
-+ wh_dentry[SRC] = simple_create_wh(src_dentry, a->btgt,
-+ a->hidden_parent[SRC], &lkup);
-+ //wh_dentry[SRC] = ERR_PTR(-1);
-+ err = PTR_ERR(wh_dentry[SRC]);
-+ if (IS_ERR(wh_dentry[SRC]))
-+ goto out_tharg;
-+ }
-+
-+ /* lookup whiteout for dentry */
-+ if (a->whdst) {
-+ struct dentry *d;
-+ d = lkup_wh(a->hidden_parent[DST], &dentry->d_name, &lkup);
-+ //d = ERR_PTR(-1);
-+ err = PTR_ERR(d);
-+ if (IS_ERR(d))
-+ goto out_whsrc;
-+ if (!d->d_inode)
-+ dput(d);
-+ else
-+ wh_dentry[DST] = d;
-+ }
-+
-+ /* rename dentry to tmpwh */
-+ if (tharg) {
-+ err = rename_whtmp(dentry, a->btgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_whdst;
-+ set_h_dptr(dentry, a->btgt, NULL);
-+ err = lkup_neg(dentry, a->btgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_whtmp;
-+ a->hidden_dentry[DST] = au_h_dptr_i(dentry, a->btgt);
-+ }
-+
-+ /* cpup src */
-+ if (a->hidden_dentry[DST]->d_inode && a->bstart[SRC] != a->btgt) {
-+ flags = au_flags_cpup(!CPUP_DTIME, a->parent[SRC]);
-+ hg_parent = a->hidden_parent[SRC]->d_parent;
-+ if (!(flags & CPUP_LOCKED_GHDIR)
-+ && hg_parent == a->hidden_parent[DST])
-+ flags |= CPUP_LOCKED_GHDIR;
-+
-+ hi_lock_child(a->hidden_dentry[SRC]->d_inode);
-+ err = sio_cpup_simple(src_dentry, a->btgt, -1, flags);
-+ //err = -1; // untested dir
-+ i_unlock(a->hidden_dentry[SRC]->d_inode);
-+ if (unlikely(err))
-+ goto out_whtmp;
-+ }
-+
-+#if 0
-+ /* clear the target ino in xino */
-+ LKTRTrace("dir %d, dst inode %p\n", a->isdir, a->hidden_dentry[DST]->d_inode);
-+ if (a->isdir && a->hidden_dentry[DST]->d_inode) {
-+ Dbg("here\n");
-+ err = xino_write(a->sb, a->btgt,
-+ a->hidden_dentry[DST]->d_inode->i_ino, 0);
-+ if (unlikely(err))
-+ goto out_whtmp;
-+ }
-+#endif
-+
-+ /* rename by vfs_rename or cpup */
-+ need_diropq = a->isdir
-+ && (wh_dentry[DST]
-+ || dbdiropq(dentry) == a->btgt
-+ || au_flag_test(a->sb, AuFlag_ALWAYS_DIROPQ));
-+ bycpup = 0;
-+ if (dbstart(src_dentry) == a->btgt) {
-+ if (need_diropq && dbdiropq(src_dentry) == a->btgt)
-+ need_diropq = 0;
-+ err = vfsub_rename(hidden_dir[SRC], au_h_dptr(src_dentry),
-+ hidden_dir[DST], a->hidden_dentry[DST],
-+ a->dlgt);
-+ //err = -1;
-+ } else {
-+ bycpup = 1;
-+ flags = au_flags_cpup(!CPUP_DTIME, a->parent[DST]);
-+ hg_parent = a->hidden_parent[DST]->d_parent;
-+ if (!(flags & CPUP_LOCKED_GHDIR)
-+ && hg_parent == a->hidden_parent[SRC])
-+ flags |= CPUP_LOCKED_GHDIR;
-+
-+ hi_lock_child(a->hidden_dentry[SRC]->d_inode);
-+ set_dbstart(src_dentry, a->btgt);
-+ set_h_dptr(src_dentry, a->btgt, dget(a->hidden_dentry[DST]));
-+ //DbgDentry(src_dentry);
-+ //DbgInode(src_dentry->d_inode);
-+ err = sio_cpup_single(src_dentry, a->btgt, a->bstart[SRC], -1,
-+ flags);
-+ //err = -1; // untested dir
-+ if (unlikely(err)) {
-+ set_h_dptr(src_dentry, a->btgt, NULL);
-+ set_dbstart(src_dentry, a->bstart[SRC]);
-+ }
-+ i_unlock(a->hidden_dentry[SRC]->d_inode);
-+ }
-+ if (unlikely(err))
-+ goto out_whtmp;
-+
-+ /* make dir opaque */
-+ if (need_diropq) {
-+ struct dentry *diropq;
-+ struct inode *h_inode;
-+
-+ h_inode = au_h_dptr_i(src_dentry, a->btgt)->d_inode;
-+ hdir_lock(h_inode, src_dentry->d_inode, a->btgt);
-+ diropq = create_diropq(src_dentry, a->btgt, a->dlgt);
-+ //diropq = ERR_PTR(-1);
-+ hdir_unlock(h_inode, src_dentry->d_inode, a->btgt);
-+ err = PTR_ERR(diropq);
-+ if (IS_ERR(diropq))
-+ goto out_rename;
-+ dput(diropq);
-+ }
-+
-+ /* remove whiteout for dentry */
-+ if (wh_dentry[DST]) {
-+ err = au_unlink_wh_dentry(hidden_dir[DST], wh_dentry[DST],
-+ dentry, a->dlgt);
-+ //err = -1;
-+ if (unlikely(err))
-+ goto out_diropq;
-+ }
-+
-+ /* remove whtmp */
-+ if (tharg) {
-+ if (au_is_nfs(hidden_dst->d_sb)
-+ || !is_longer_wh(&a->whlist, a->btgt,
-+ stosi(a->sb)->si_dirwh)) {
-+ err = rmdir_whtmp(hidden_dst, &a->whlist, a->btgt, dir,
-+ dentry->d_inode);
-+ if (unlikely(err))
-+ Warn("failed removing whtmp dir %.*s (%d), "
-+ "ignored.\n", DLNPair(hidden_dst), err);
-+ } else {
-+ kick_rmdir_whtmp(hidden_dst, &a->whlist, a->btgt, dir,
-+ dentry->d_inode, tharg);
-+ dput(hidden_dst);
-+ tharg = NULL;
-+ }
-+ }
-+ err = 0;
-+ goto out_success;
-+
-+#define RevertFailure(fmt, args...) do { \
-+ IOErrWhck("revert failure: " fmt " (%d, %d)\n", \
-+ ##args, err, rerr); \
-+ err = -EIO; \
-+ } while(0)
-+
-+ out_diropq:
-+ if (need_diropq) {
-+ struct inode *h_inode;
-+
-+ h_inode = au_h_dptr_i(src_dentry, a->btgt)->d_inode;
-+ // i_lock simplly since inotify is not set to h_inode.
-+ hi_lock_parent(h_inode);
-+ //hdir_lock(h_inode, src_dentry->d_inode, a->btgt);
-+ rerr = remove_diropq(src_dentry, a->btgt, a->dlgt);
-+ //rerr = -1;
-+ //hdir_unlock(h_inode, src_dentry->d_inode, a->btgt);
-+ i_unlock(h_inode);
-+ if (rerr)
-+ RevertFailure("remove diropq %.*s",
-+ DLNPair(src_dentry));
-+ }
-+ out_rename:
-+ if (!bycpup) {
-+ struct dentry *d;
-+ struct qstr *name = &src_dentry->d_name;
-+ d = lkup_one(name->name, a->hidden_parent[SRC], name->len,
-+ &lkup);
-+ //d = ERR_PTR(-1);
-+ rerr = PTR_ERR(d);
-+ if (IS_ERR(d)) {
-+ RevertFailure("lkup_one %.*s", DLNPair(src_dentry));
-+ goto out_whtmp;
-+ }
-+ DEBUG_ON(d->d_inode);
-+ rerr = vfsub_rename
-+ (hidden_dir[DST], au_h_dptr_i(src_dentry, a->btgt),
-+ hidden_dir[SRC], d, a->dlgt);
-+ //rerr = -1;
-+ d_drop(d);
-+ dput(d);
-+ //set_h_dptr(src_dentry, a->btgt, NULL);
-+ if (rerr)
-+ RevertFailure("rename %.*s", DLNPair(src_dentry));
-+ } else {
-+ rerr = vfsub_unlink(hidden_dir[DST], a->hidden_dentry[DST],
-+ a->dlgt);
-+ //rerr = -1;
-+ set_h_dptr(src_dentry, a->btgt, NULL);
-+ set_dbstart(src_dentry, a->bstart[SRC]);
-+ if (rerr)
-+ RevertFailure("unlink %.*s",
-+ DLNPair(a->hidden_dentry[DST]));
-+ }
-+ out_whtmp:
-+ if (tharg) {
-+ struct dentry *d;
-+ struct qstr *name = &dentry->d_name;
-+ LKTRLabel(here);
-+ d = lkup_one(name->name, a->hidden_parent[DST], name->len,
-+ &lkup);
-+ //d = ERR_PTR(-1);
-+ rerr = PTR_ERR(d);
-+ if (IS_ERR(d)) {
-+ RevertFailure("lookup %.*s", LNPair(name));
-+ goto out_whdst;
-+ }
-+ if (d->d_inode) {
-+ d_drop(d);
-+ dput(d);
-+ goto out_whdst;
-+ }
-+ DEBUG_ON(d->d_inode);
-+ rerr = vfsub_rename(hidden_dir[DST], hidden_dst,
-+ hidden_dir[DST], d, a->dlgt);
-+ //rerr = -1;
-+ d_drop(d);
-+ dput(d);
-+ if (rerr) {
-+ RevertFailure("rename %.*s", DLNPair(hidden_dst));
-+ goto out_whdst;
-+ }
-+ set_h_dptr(dentry, a->btgt, NULL);
-+ set_h_dptr(dentry, a->btgt, dget(hidden_dst));
-+ }
-+ out_whdst:
-+ dput(wh_dentry[DST]);
-+ wh_dentry[DST] = NULL;
-+ out_whsrc:
-+ if (wh_dentry[SRC]) {
-+ LKTRLabel(here);
-+ rerr = au_unlink_wh_dentry(hidden_dir[SRC], wh_dentry[SRC],
-+ src_dentry, a->dlgt);
-+ //rerr = -1;
-+ if (rerr)
-+ RevertFailure("unlink %.*s", DLNPair(wh_dentry[SRC]));
-+ }
-+#undef RevertFailure
-+ d_drop(src_dentry);
-+ bend = dbend(src_dentry);
-+ for (bindex = dbstart(src_dentry); bindex <= bend; bindex++) {
-+ struct dentry *hd;
-+ hd = au_h_dptr_i(src_dentry, bindex);
-+ if (hd)
-+ d_drop(hd);
-+ }
-+ d_drop(dentry);
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); bindex <= bend; bindex++) {
-+ struct dentry *hd;
-+ hd = au_h_dptr_i(dentry, bindex);
-+ if (hd)
-+ d_drop(hd);
-+ }
-+ au_update_dbstart(dentry);
-+ if (tharg)
-+ d_drop(hidden_dst);
-+ out_success:
-+ dput(wh_dentry[SRC]);
-+ dput(wh_dentry[DST]);
-+ out_tharg:
-+ if (tharg) {
-+ dput(hidden_dst);
-+ kfree(tharg);
-+ }
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * test if @dentry dir can be rename destination or not.
-+ * success means, it is a logically empty dir.
-+ */
-+static int may_rename_dstdir(struct dentry *dentry, aufs_bindex_t btgt,
-+ struct aufs_nhash *whlist)
-+{
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+
-+ return test_empty(dentry, whlist);
-+}
-+
-+/*
-+ * test if @dentry dir can be rename source or not.
-+ * if it can, return 0 and @children is filled.
-+ * success means,
-+ * - or, it is a logically empty dir.
-+ * - or, it exists on writable branch and has no children including whiteouts
-+ * on the lower branch.
-+ */
-+static int may_rename_srcdir(struct dentry *dentry, aufs_bindex_t btgt)
-+{
-+ int err;
-+ aufs_bindex_t bstart;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+
-+ bstart = dbstart(dentry);
-+ if (bstart != btgt) {
-+ struct aufs_nhash *whlist;
-+
-+ whlist = nhash_new(GFP_KERNEL);
-+ err = PTR_ERR(whlist);
-+ if (IS_ERR(whlist))
-+ goto out;
-+ err = test_empty(dentry, whlist);
-+ nhash_del(whlist);
-+ goto out;
-+ }
-+
-+ if (bstart == dbtaildir(dentry))
-+ return 0; /* success */
-+
-+ err = au_test_empty_lower(dentry);
-+
-+ out:
-+ if (/* unlikely */(err == -ENOTEMPTY))
-+ err = -EXDEV;
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int aufs_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry)
-+{
-+ int err, do_dt_dstdir;
-+ aufs_bindex_t bend, bindex;
-+ struct inode *inode, *dirs[2];
-+ enum {PARENT, CHILD};
-+ /* reduce stack space */
-+ struct {
-+ struct rename_args a;
-+ struct dtime dt[2][2];
-+ } *p;
-+
-+ LKTRTrace("i%lu, %.*s, i%lu, %.*s\n",
-+ src_dir->i_ino, DLNPair(src_dentry),
-+ dir->i_ino, DLNPair(dentry));
-+ IMustLock(src_dir);
-+ IMustLock(dir);
-+ /* braces are added to stop a warning */
-+ if (dentry->d_inode) {
-+ IMustLock(dentry->d_inode);
-+ }
-+
-+ err = -ENOMEM;
-+ BUILD_BUG_ON(sizeof(*p) > PAGE_SIZE);
-+ p = kmalloc(sizeof(*p), GFP_KERNEL);
-+ if (unlikely(!p))
-+ goto out;
-+
-+ err = -ENOTDIR;
-+ p->a.sb = src_dentry->d_sb;
-+ inode = src_dentry->d_inode;
-+ p->a.isdir = !!S_ISDIR(inode->i_mode);
-+ if (unlikely(p->a.isdir && dentry->d_inode
-+ && !S_ISDIR(dentry->d_inode->i_mode)))
-+ goto out_free;
-+
-+ aufs_read_and_write_lock2(dentry, src_dentry, p->a.isdir);
-+ p->a.dlgt = !!need_dlgt(p->a.sb);
-+ p->a.parent[SRC] = p->a.parent[DST] = dentry->d_parent;
-+ p->a.issamedir = (src_dir == dir);
-+ if (p->a.issamedir)
-+ di_write_lock_parent(p->a.parent[DST]);
-+ else {
-+ p->a.parent[SRC] = src_dentry->d_parent;
-+ di_write_lock2_parent(p->a.parent[SRC], p->a.parent[DST],
-+ /*isdir*/1);
-+ }
-+
-+ /* which branch we process */
-+ p->a.bstart[DST] = dbstart(dentry);
-+ p->a.btgt = err = wr_dir(dentry, 1, src_dentry, /*force_btgt*/-1,
-+ /*do_lock_srcdir*/0);
-+ if (unlikely(err < 0))
-+ goto out_unlock;
-+
-+ /* are they available to be renamed */
-+ err = 0;
-+ nhash_init(&p->a.whlist);
-+ if (p->a.isdir && dentry->d_inode) {
-+ set_dbstart(dentry, p->a.bstart[DST]);
-+ err = may_rename_dstdir(dentry, p->a.btgt, &p->a.whlist);
-+ set_dbstart(dentry, p->a.btgt);
-+ }
-+ p->a.hidden_dentry[DST] = au_h_dptr(dentry);
-+ if (unlikely(err))
-+ goto out_unlock;
-+ //todo: minor optimize, their sb may be same while their bindex differs.
-+ p->a.bstart[SRC] = dbstart(src_dentry);
-+ p->a.hidden_dentry[SRC] = au_h_dptr(src_dentry);
-+ if (p->a.isdir) {
-+ err = may_rename_srcdir(src_dentry, p->a.btgt);
-+ if (unlikely(err))
-+ goto out_children;
-+ }
-+
-+ /* prepare the writable parent dir on the same branch */
-+ err = wr_dir_need_wh(src_dentry, p->a.isdir, &p->a.btgt,
-+ p->a.issamedir ? NULL : p->a.parent[DST]);
-+ if (unlikely(err < 0))
-+ goto out_children;
-+ p->a.whsrc = !!err;
-+ p->a.whdst = (p->a.bstart[DST] == p->a.btgt);
-+ if (!p->a.whdst) {
-+ err = cpup_dirs(dentry, p->a.btgt,
-+ p->a.issamedir ? NULL : p->a.parent[SRC]);
-+ if (unlikely(err))
-+ goto out_children;
-+ }
-+
-+ p->a.hidden_parent[SRC] = au_h_dptr_i(p->a.parent[SRC], p->a.btgt);
-+ p->a.hidden_parent[DST] = au_h_dptr_i(p->a.parent[DST], p->a.btgt);
-+ dirs[0] = src_dir;
-+ dirs[1] = dir;
-+ hdir_lock_rename(p->a.hidden_parent, dirs, p->a.btgt, p->a.issamedir);
-+
-+ /* store timestamps to be revertible */
-+ dtime_store(p->dt[PARENT] + SRC, p->a.parent[SRC],
-+ p->a.hidden_parent[SRC]);
-+ if (!p->a.issamedir)
-+ dtime_store(p->dt[PARENT] + DST, p->a.parent[DST],
-+ p->a.hidden_parent[DST]);
-+ do_dt_dstdir = 0;
-+ if (p->a.isdir) {
-+ dtime_store(p->dt[CHILD] + SRC, src_dentry,
-+ p->a.hidden_dentry[SRC]);
-+ if (p->a.hidden_dentry[DST]->d_inode) {
-+ do_dt_dstdir = 1;
-+ dtime_store(p->dt[CHILD] + DST, dentry,
-+ p->a.hidden_dentry[DST]);
-+ }
-+ }
-+
-+ err = do_rename(src_dir, src_dentry, dir, dentry, &p->a);
-+ if (unlikely(err))
-+ goto out_dt;
-+ hdir_unlock_rename(p->a.hidden_parent, dirs, p->a.btgt, p->a.issamedir);
-+
-+ /* update dir attributes */
-+ dir->i_version++;
-+ if (p->a.isdir)
-+ au_cpup_attr_nlink(dir);
-+ if (ibstart(dir) == p->a.btgt)
-+ au_cpup_attr_timesizes(dir);
-+
-+ if (!p->a.issamedir) {
-+ src_dir->i_version++;
-+ if (p->a.isdir)
-+ au_cpup_attr_nlink(src_dir);
-+ if (ibstart(src_dir) == p->a.btgt)
-+ au_cpup_attr_timesizes(src_dir);
-+ }
-+
-+ // is this updating defined in POSIX?
-+ if (unlikely(p->a.isdir)) {
-+ //i_lock(inode);
-+ au_cpup_attr_timesizes(inode);
-+ //i_unlock(inode);
-+ }
-+
-+#if 0
-+ d_drop(src_dentry);
-+#else
-+ /* dput/iput all lower dentries */
-+ set_dbwh(src_dentry, -1);
-+ bend = dbend(src_dentry);
-+ for (bindex = p->a.btgt + 1; bindex <= bend; bindex++) {
-+ struct dentry *hd;
-+ hd = au_h_dptr_i(src_dentry, bindex);
-+ if (hd)
-+ set_h_dptr(src_dentry, bindex, NULL);
-+ }
-+ set_dbend(src_dentry, p->a.btgt);
-+
-+ bend = ibend(inode);
-+ for (bindex = p->a.btgt + 1; bindex <= bend; bindex++) {
-+ struct inode *hi;
-+ hi = au_h_iptr_i(inode, bindex);
-+ if (hi)
-+ set_h_iptr(inode, bindex, NULL, 0);
-+ }
-+ set_ibend(inode, p->a.btgt);
-+#endif
-+
-+#if 0
-+ //au_debug_on();
-+ //DbgDentry(dentry);
-+ //DbgInode(dentry->d_inode);
-+ //au_debug_off();
-+ inode = dentry->d_inode;
-+ if (inode) {
-+ aufs_bindex_t bindex, bend;
-+ struct dentry *hd;
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); bindex <= bend; bindex++) {
-+ hd = au_h_dptr_i(dentry, bindex);
-+ if (hd && hd->d_inode)
-+ xino_write0(p->a.sb, bindex, hd->d_inode->i_ino);
-+ /* ignore this error */
-+ }
-+ }
-+#endif
-+
-+ goto out_children; /* success */
-+
-+ out_dt:
-+ dtime_revert(p->dt[PARENT] + SRC,
-+ p->a.hidden_parent[SRC]->d_parent
-+ == p->a.hidden_parent[DST]);
-+ if (!p->a.issamedir)
-+ dtime_revert(p->dt[PARENT] + DST,
-+ p->a.hidden_parent[DST]->d_parent
-+ == p->a.hidden_parent[SRC]);
-+ if (p->a.isdir && err != -EIO) {
-+ struct dentry *hd;
-+
-+ hd = p->dt[CHILD][SRC].dt_h_dentry;
-+ hi_lock_child(hd->d_inode);
-+ dtime_revert(p->dt[CHILD] + SRC, 1);
-+ i_unlock(hd->d_inode);
-+ if (do_dt_dstdir) {
-+ hd = p->dt[CHILD][DST].dt_h_dentry;
-+ hi_lock_child(hd->d_inode);
-+ dtime_revert(p->dt[CHILD] + DST, 1);
-+ i_unlock(hd->d_inode);
-+ }
-+ }
-+ hdir_unlock_rename(p->a.hidden_parent, dirs, p->a.btgt, p->a.issamedir);
-+ out_children:
-+ nhash_fin(&p->a.whlist);
-+ out_unlock:
-+ //if (unlikely(err /* && p->a.isdir */)) {
-+ if (unlikely(err && p->a.isdir)) {
-+ au_update_dbstart(dentry);
-+ d_drop(dentry);
-+ }
-+ if (p->a.issamedir)
-+ di_write_unlock(p->a.parent[DST]);
-+ else
-+ di_write_unlock2(p->a.parent[SRC], p->a.parent[DST]);
-+ aufs_read_and_write_unlock2(dentry, src_dentry);
-+ out_free:
-+ kfree(p);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/iinfo.c linux-2.6.22.1/fs/aufs/iinfo.c
---- linux-2.6.22.1.oorig/fs/aufs/iinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/iinfo.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,286 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: iinfo.c,v 1.31 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+//#include <linux/mm.h>
-+#include "aufs.h"
-+
-+struct aufs_iinfo *itoii(struct inode *inode)
-+{
-+ struct aufs_iinfo *iinfo;
-+
-+ iinfo = &(container_of(inode, struct aufs_icntnr, vfs_inode)->iinfo);
-+ /* bad_inode case */
-+ if (unlikely(!iinfo->ii_hinode))
-+ return NULL;
-+ DEBUG_ON(!iinfo->ii_hinode
-+ /* || stosi(inode->i_sb)->si_bend < iinfo->ii_bend */
-+ || iinfo->ii_bend < iinfo->ii_bstart);
-+ return iinfo;
-+}
-+
-+aufs_bindex_t ibstart(struct inode *inode)
-+{
-+ IiMustAnyLock(inode);
-+ return itoii(inode)->ii_bstart;
-+}
-+
-+aufs_bindex_t ibend(struct inode *inode)
-+{
-+ IiMustAnyLock(inode);
-+ return itoii(inode)->ii_bend;
-+}
-+
-+struct aufs_vdir *ivdir(struct inode *inode)
-+{
-+ IiMustAnyLock(inode);
-+ DEBUG_ON(!S_ISDIR(inode->i_mode));
-+ return itoii(inode)->ii_vdir;
-+}
-+
-+struct inode *au_h_iptr_i(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ struct inode *hidden_inode;
-+
-+ IiMustAnyLock(inode);
-+ DEBUG_ON(bindex < 0 || ibend(inode) < bindex);
-+ hidden_inode = itoii(inode)->ii_hinode[0 + bindex].hi_inode;
-+ DEBUG_ON(hidden_inode && atomic_read(&hidden_inode->i_count) <= 0);
-+ return hidden_inode;
-+}
-+
-+struct inode *au_h_iptr(struct inode *inode)
-+{
-+ return au_h_iptr_i(inode, ibstart(inode));
-+}
-+
-+aufs_bindex_t itoid_index(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ IiMustAnyLock(inode);
-+ DEBUG_ON(bindex < 0
-+ || ibend(inode) < bindex
-+ || !itoii(inode)->ii_hinode[0 + bindex].hi_inode);
-+ return itoii(inode)->ii_hinode[0 + bindex].hi_id;
-+}
-+
-+// hard/soft set
-+void set_ibstart(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ struct aufs_iinfo *iinfo = itoii(inode);
-+ struct inode *h_inode;
-+
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(sbend(inode->i_sb) < bindex);
-+ iinfo->ii_bstart = bindex;
-+ h_inode = iinfo->ii_hinode[bindex + 0].hi_inode;
-+ if (h_inode)
-+ au_cpup_igen(inode, h_inode);
-+}
-+
-+void set_ibend(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(sbend(inode->i_sb) < bindex
-+ || bindex < ibstart(inode));
-+ itoii(inode)->ii_bend = bindex;
-+}
-+
-+void set_ivdir(struct inode *inode, struct aufs_vdir *vdir)
-+{
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(!S_ISDIR(inode->i_mode)
-+ || (itoii(inode)->ii_vdir && vdir));
-+ itoii(inode)->ii_vdir = vdir;
-+}
-+
-+void aufs_hiput(struct aufs_hinode *hinode)
-+{
-+ if (unlikely(hinode->hi_notify))
-+ do_free_hinotify(hinode);
-+ if (hinode->hi_inode)
-+ iput(hinode->hi_inode);
-+}
-+
-+unsigned int au_hi_flags(struct inode *inode, int isdir)
-+{
-+ unsigned int flags;
-+ struct super_block *sb = inode->i_sb;
-+
-+ flags = 0;
-+ if (au_flag_test(sb, AuFlag_XINO))
-+ flags = AUFS_HI_XINO;
-+ if (unlikely(isdir && au_flag_test(sb, AuFlag_UDBA_INOTIFY)))
-+ flags |= AUFS_HI_NOTIFY;
-+ return flags;
-+}
-+
-+void set_h_iptr(struct inode *inode, aufs_bindex_t bindex,
-+ struct inode *h_inode, unsigned int flags)
-+{
-+ struct aufs_hinode *hinode;
-+ struct inode *hi;
-+ struct aufs_iinfo *iinfo = itoii(inode);
-+
-+ LKTRTrace("i%lu, b%d, hi%lu, flags 0x%x\n",
-+ inode->i_ino, bindex, h_inode ? h_inode->i_ino : 0, flags);
-+ IiMustWriteLock(inode);
-+ hinode = iinfo->ii_hinode + bindex;
-+ hi = hinode->hi_inode;
-+ DEBUG_ON(bindex < ibstart(inode) || ibend(inode) < bindex
-+ || (h_inode && atomic_read(&h_inode->i_count) <= 0)
-+ || (h_inode && hi));
-+
-+ if (hi)
-+ aufs_hiput(hinode);
-+ hinode->hi_inode = h_inode;
-+ if (h_inode) {
-+ int err;
-+ struct super_block *sb = inode->i_sb;
-+
-+ if (bindex == iinfo->ii_bstart)
-+ au_cpup_igen(inode, h_inode);
-+ hinode->hi_id = sbr_id(sb, bindex);
-+ if (flags & AUFS_HI_XINO) {
-+ struct xino xino = {
-+ .ino = inode->i_ino,
-+ //.h_gen = h_inode->i_generation
-+ };
-+ //WARN_ON(xino.h_gen == AuXino_INVALID_HGEN);
-+ err = xino_write(sb, bindex, h_inode->i_ino, &xino);
-+ if (unlikely(err)) {
-+ IOErr1("failed xino_write() %d, force noxino\n",
-+ err);
-+ au_flag_clr(sb, AuFlag_XINO);
-+ }
-+ }
-+ if (flags & AUFS_HI_NOTIFY) {
-+ err = alloc_hinotify(hinode, inode, h_inode);
-+ if (unlikely(err))
-+ IOErr1("alloc_hinotify() %d\n", err);
-+ else {
-+ /* braces are added to stop a warning */
-+ DEBUG_ON(!hinode->hi_notify);
-+ }
-+ }
-+ }
-+}
-+
-+void au_update_iigen(struct inode *inode)
-+{
-+ //IiMustWriteLock(inode);
-+ DEBUG_ON(!inode->i_sb);
-+ atomic_set(&itoii(inode)->ii_generation, au_sigen(inode->i_sb));
-+}
-+
-+/* it may be called at remount time, too */
-+void au_update_brange(struct inode *inode, int do_put_zero)
-+{
-+ struct aufs_iinfo *iinfo;
-+
-+ LKTRTrace("i%lu, %d\n", inode->i_ino, do_put_zero);
-+ IiMustWriteLock(inode);
-+
-+ iinfo = itoii(inode);
-+ if (unlikely(!iinfo) || iinfo->ii_bstart < 0)
-+ return;
-+
-+ if (do_put_zero) {
-+ aufs_bindex_t bindex;
-+ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend;
-+ bindex++) {
-+ struct inode *h_i;
-+ h_i = iinfo->ii_hinode[0 + bindex].hi_inode;
-+ if (h_i && !h_i->i_nlink)
-+ set_h_iptr(inode, bindex, NULL, 0);
-+ }
-+ }
-+
-+ iinfo->ii_bstart = -1;
-+ while (++iinfo->ii_bstart <= iinfo->ii_bend)
-+ if (iinfo->ii_hinode[0 + iinfo->ii_bstart].hi_inode)
-+ break;
-+ if (iinfo->ii_bstart > iinfo->ii_bend) {
-+ iinfo->ii_bend = iinfo->ii_bstart = -1;
-+ return;
-+ }
-+
-+ iinfo->ii_bend++;
-+ while (0 <= --iinfo->ii_bend)
-+ if (iinfo->ii_hinode[0 + iinfo->ii_bend].hi_inode)
-+ break;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int au_iinfo_init(struct inode *inode)
-+{
-+ struct aufs_iinfo *iinfo;
-+ struct super_block *sb;
-+ int nbr, i;
-+
-+ sb = inode->i_sb;
-+ DEBUG_ON(!sb);
-+ iinfo = &(container_of(inode, struct aufs_icntnr, vfs_inode)->iinfo);
-+ DEBUG_ON(iinfo->ii_hinode);
-+ nbr = sbend(sb) + 1;
-+ if (unlikely(!nbr))
-+ nbr++;
-+ iinfo->ii_hinode = kcalloc(nbr, sizeof(*iinfo->ii_hinode), GFP_KERNEL);
-+ //iinfo->ii_hinode = NULL;
-+ if (iinfo->ii_hinode) {
-+ for (i = 0; i < nbr; i++)
-+ iinfo->ii_hinode[i].hi_id = -1;
-+ atomic_set(&iinfo->ii_generation, au_sigen(sb));
-+ rw_init_nolock(&iinfo->ii_rwsem);
-+ iinfo->ii_bstart = -1;
-+ iinfo->ii_bend = -1;
-+ iinfo->ii_vdir = NULL;
-+ return 0;
-+ }
-+ return -ENOMEM;
-+}
-+
-+void au_iinfo_fin(struct inode *inode)
-+{
-+ struct aufs_iinfo *iinfo;
-+
-+ iinfo = itoii(inode);
-+ /* bad_inode case */
-+ if (unlikely(!iinfo))
-+ return;
-+
-+ if (unlikely(iinfo->ii_vdir))
-+ free_vdir(iinfo->ii_vdir);
-+
-+ if (iinfo->ii_bstart >= 0) {
-+ aufs_bindex_t bend;
-+ struct aufs_hinode *hi;
-+ hi = iinfo->ii_hinode + iinfo->ii_bstart;
-+ bend = iinfo->ii_bend;
-+ while (iinfo->ii_bstart++ <= bend) {
-+ if (hi->hi_inode)
-+ aufs_hiput(hi);
-+ hi++;
-+ }
-+ //iinfo->ii_bstart = iinfo->ii_bend = -1;
-+ }
-+
-+ kfree(iinfo->ii_hinode);
-+ //iinfo->ii_hinode = NULL;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/inode.c linux-2.6.22.1/fs/aufs/inode.c
---- linux-2.6.22.1.oorig/fs/aufs/inode.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/inode.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,339 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: inode.c,v 1.22 2007/05/07 03:44:35 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+int au_refresh_hinode(struct inode *inode, struct dentry *dentry)
-+{
-+ int err, new_sz, update, isdir;
-+ struct inode *first;
-+ struct aufs_hinode *p, *q, tmp;
-+ struct super_block *sb;
-+ struct aufs_iinfo *iinfo;
-+ aufs_bindex_t bindex, bend, new_bindex;
-+ unsigned int flags;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ IiMustWriteLock(inode);
-+
-+ err = -ENOMEM;
-+ sb = dentry->d_sb;
-+ bend = sbend(sb);
-+ new_sz = sizeof(*iinfo->ii_hinode) * (bend + 1);
-+ iinfo = itoii(inode);
-+ p = au_kzrealloc(iinfo->ii_hinode, sizeof(*p) * (iinfo->ii_bend + 1),
-+ new_sz, GFP_KERNEL);
-+ //p = NULL;
-+ if (unlikely(!p))
-+ goto out;
-+
-+ iinfo->ii_hinode = p;
-+ err = 0;
-+ update = 0;
-+ p = iinfo->ii_hinode + iinfo->ii_bstart;
-+ first = p->hi_inode;
-+ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend;
-+ bindex++, p++) {
-+ if (unlikely(!p->hi_inode))
-+ continue;
-+
-+ new_bindex = find_brindex(sb, p->hi_id);
-+ if (new_bindex == bindex)
-+ continue;
-+ if (new_bindex < 0) {
-+ update++;
-+ aufs_hiput(p);
-+ p->hi_inode = NULL;
-+ continue;
-+ }
-+
-+ if (new_bindex < iinfo->ii_bstart)
-+ iinfo->ii_bstart = new_bindex;
-+ if (iinfo->ii_bend < new_bindex)
-+ iinfo->ii_bend = new_bindex;
-+ /* swap two hidden inode, and loop again */
-+ q = iinfo->ii_hinode + new_bindex;
-+ tmp = *q;
-+ *q = *p;
-+ *p = tmp;
-+ if (tmp.hi_inode) {
-+ bindex--;
-+ p--;
-+ }
-+ }
-+
-+ isdir = S_ISDIR(inode->i_mode);
-+ flags = au_hi_flags(inode, isdir);
-+ bend = dbend(dentry);
-+ for (bindex = dbstart(dentry); bindex <= bend; bindex++) {
-+ struct inode *hi;
-+ struct dentry *hd;
-+
-+ hd = au_h_dptr_i(dentry, bindex);
-+ if (!hd || !hd->d_inode)
-+ continue;
-+
-+ if (iinfo->ii_bstart <= bindex && bindex <= iinfo->ii_bend) {
-+ hi = au_h_iptr_i(inode, bindex);
-+ if (hi) {
-+ if (hi == hd->d_inode)
-+ continue;
-+ //Dbg("here\n");
-+ err = -ESTALE;
-+ break;
-+ }
-+ }
-+ if (bindex < iinfo->ii_bstart)
-+ iinfo->ii_bstart = bindex;
-+ if (iinfo->ii_bend < bindex)
-+ iinfo->ii_bend = bindex;
-+ set_h_iptr(inode, bindex, igrab(hd->d_inode), flags);
-+ update++;
-+ }
-+
-+ bend = iinfo->ii_bend;
-+ p = iinfo->ii_hinode;
-+ for (bindex = 0; bindex <= bend; bindex++, p++)
-+ if (p->hi_inode) {
-+ iinfo->ii_bstart = bindex;
-+ break;
-+ }
-+ p = iinfo->ii_hinode + bend;
-+ for (bindex = bend; bindex > iinfo->ii_bstart; bindex--, p--)
-+ if (p->hi_inode) {
-+ iinfo->ii_bend = bindex;
-+ break;
-+ }
-+ DEBUG_ON(iinfo->ii_bstart > bend || iinfo->ii_bend < 0);
-+
-+ if (unlikely(err))
-+ goto out;
-+
-+ if (1 || first != au_h_iptr(inode))
-+ au_cpup_attr_all(inode);
-+ if (update && isdir)
-+ inode->i_version++;
-+ au_update_iigen(inode);
-+
-+ out:
-+ //au_debug_on();
-+ TraceErr(err);
-+ //au_debug_off();
-+ return err;
-+}
-+
-+static int set_inode(struct inode *inode, struct dentry *dentry)
-+{
-+ int err, isdir;
-+ struct dentry *hidden_dentry;
-+ struct inode *hidden_inode;
-+ umode_t mode;
-+ aufs_bindex_t bindex, bstart, btail;
-+ struct aufs_iinfo *iinfo;
-+ unsigned int flags;
-+
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(dentry));
-+ DEBUG_ON(!(inode->i_state & I_NEW));
-+ IiMustWriteLock(inode);
-+ hidden_dentry = au_h_dptr(dentry);
-+ DEBUG_ON(!hidden_dentry);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_inode);
-+
-+ err = 0;
-+ isdir = 0;
-+ bstart = dbstart(dentry);
-+ mode = hidden_inode->i_mode;
-+ switch (mode & S_IFMT) {
-+ case S_IFREG:
-+ btail = dbtail(dentry);
-+ break;
-+ case S_IFDIR:
-+ isdir = 1;
-+ btail = dbtaildir(dentry);
-+ inode->i_op = &aufs_dir_iop;
-+ inode->i_fop = &aufs_dir_fop;
-+ break;
-+ case S_IFLNK:
-+ btail = dbtail(dentry);
-+ inode->i_op = &aufs_symlink_iop;
-+ break;
-+ case S_IFBLK:
-+ case S_IFCHR:
-+ case S_IFIFO:
-+ case S_IFSOCK:
-+ btail = dbtail(dentry);
-+ init_special_inode(inode, mode, hidden_inode->i_rdev);
-+ break;
-+ default:
-+ IOErr("Unknown file type 0%o\n", mode);
-+ err = -EIO;
-+ goto out;
-+ }
-+
-+ flags = au_hi_flags(inode, isdir);
-+ iinfo = itoii(inode);
-+ iinfo->ii_bstart = bstart;
-+ iinfo->ii_bend = btail;
-+ for (bindex = bstart; bindex <= btail; bindex++) {
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!hidden_dentry)
-+ continue;
-+ DEBUG_ON(!hidden_dentry->d_inode);
-+ set_h_iptr(inode, bindex, igrab(hidden_dentry->d_inode), flags);
-+ }
-+ au_cpup_attr_all(inode);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* successful returns with iinfo write_locked */
-+//todo: return with unlocked?
-+static int reval_inode(struct inode *inode, struct dentry *dentry, int *matched)
-+{
-+ int err;
-+ struct inode *h_inode, *h_dinode;
-+ aufs_bindex_t bindex, bend;
-+ //const int udba = !au_flag_test(inode->i_sb, AuFlag_UDBA_NONE);
-+
-+ LKTRTrace("i%lu, %.*s\n", inode->i_ino, DLNPair(dentry));
-+
-+ *matched = 0;
-+
-+ /*
-+ * before this function, if aufs got any iinfo lock, it must be only
-+ * one, the parent dir.
-+ * it can happen by UDBA and the obsoleted inode number.
-+ */
-+ err = -EIO;
-+ if (unlikely(inode->i_ino == parent_ino(dentry)))
-+ goto out;
-+
-+ h_dinode = au_h_dptr(dentry)->d_inode;
-+ hi_lock_child(inode); // bad name, this is not a hidden inode.
-+ ii_write_lock_new(inode);
-+ bend = ibend(inode);
-+ for (bindex = ibstart(inode); bindex <= bend; bindex++) {
-+ h_inode = au_h_iptr_i(inode, bindex);
-+ if (h_inode && h_inode == h_dinode) {
-+ //&& (ibs != bstart || !au_test_higen(inode, h_inode)));
-+ *matched = 1;
-+ err = 0;
-+ if (unlikely(au_iigen(inode) != au_digen(dentry)))
-+ err = au_refresh_hinode(inode, dentry);
-+ break;
-+ }
-+ }
-+ i_unlock(inode);
-+ if (unlikely(err))
-+ ii_write_unlock(inode);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* successful returns with iinfo write_locked */
-+//todo: return with unlocked?
-+struct inode *au_new_inode(struct dentry *dentry)
-+{
-+ struct inode *inode, *h_inode;
-+ struct dentry *h_dentry;
-+ ino_t h_ino;
-+ struct super_block *sb;
-+ int err, match;
-+ aufs_bindex_t bstart;
-+ struct xino xino;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ sb = dentry->d_sb;
-+ h_dentry = au_h_dptr(dentry);
-+ DEBUG_ON(!h_dentry);
-+ h_inode = h_dentry->d_inode;
-+ DEBUG_ON(!h_inode);
-+
-+ bstart = dbstart(dentry);
-+ h_ino = h_inode->i_ino;
-+ err = xino_read(sb, bstart, h_ino, &xino);
-+ //err = -1;
-+ inode = ERR_PTR(err);
-+ if (unlikely(err))
-+ goto out;
-+ new_ino:
-+ if (!xino.ino) {
-+ xino.ino = xino_new_ino(sb);
-+ if (!xino.ino) {
-+ inode = ERR_PTR(-EIO);
-+ goto out;
-+ }
-+ }
-+
-+ LKTRTrace("i%lu\n", xino.ino);
-+ err = -ENOMEM;
-+ inode = iget_locked(sb, xino.ino);
-+ if (unlikely(!inode))
-+ goto out;
-+ err = PTR_ERR(inode);
-+ if (IS_ERR(inode))
-+ goto out;
-+ err = -ENOMEM;
-+ if (unlikely(is_bad_inode(inode)))
-+ goto out_iput;
-+
-+ LKTRTrace("%lx, new %d\n", inode->i_state, !!(inode->i_state & I_NEW));
-+ if (inode->i_state & I_NEW) {
-+ sb->s_op->read_inode(inode);
-+ if (!is_bad_inode(inode)) {
-+ ii_write_lock_new(inode);
-+ err = set_inode(inode, dentry);
-+ //err = -1;
-+ }
-+ unlock_new_inode(inode);
-+ if (!err)
-+ goto out; /* success */
-+ ii_write_unlock(inode);
-+ goto out_iput;
-+ } else {
-+ err = reval_inode(inode, dentry, &match);
-+ if (!err)
-+ goto out; /* success */
-+ else if (match)
-+ goto out_iput;
-+ }
-+
-+ Warn1("broken ino, b%d, %.*s/%.*s, hi%lu, i%lu. Try udba=inotify.\n",
-+ bstart, DLNPair(dentry->d_parent), DLNPair(dentry), h_ino,
-+ xino.ino);
-+ xino.ino = 0;
-+ err = xino_write0(sb, bstart, h_ino);
-+ if (!err) {
-+ iput(inode);
-+ goto new_ino;
-+ }
-+
-+ out_iput:
-+ iput(inode);
-+ inode = ERR_PTR(err);
-+ out:
-+ TraceErrPtr(inode);
-+ return inode;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/inode.h linux-2.6.22.1/fs/aufs/inode.h
---- linux-2.6.22.1.oorig/fs/aufs/inode.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/inode.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,377 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: inode.h,v 1.32 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_INODE_H__
-+#define __AUFS_INODE_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/inotify.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+#include "vfsub.h"
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+#else
-+struct inotify_watch {};
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_hinotify {
-+ struct inotify_watch hin_watch;
-+ struct inode *hin_aufs_inode; /* no get/put */
-+};
-+
-+struct aufs_hinode {
-+ struct inode *hi_inode;
-+ aufs_bindex_t hi_id;
-+ struct aufs_hinotify *hi_notify;
-+};
-+
-+struct aufs_vdir;
-+struct aufs_iinfo {
-+ atomic_t ii_generation;
-+ struct super_block *ii_hsb1; /* no get/put */
-+
-+ struct aufs_rwsem ii_rwsem;
-+ aufs_bindex_t ii_bstart, ii_bend;
-+ struct aufs_hinode *ii_hinode;
-+ struct aufs_vdir *ii_vdir;
-+};
-+
-+struct aufs_icntnr {
-+ struct aufs_iinfo iinfo;
-+ struct inode vfs_inode;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* inode.c */
-+int au_refresh_hinode(struct inode *inode, struct dentry *dentry);
-+struct inode *au_new_inode(struct dentry *dentry);
-+
-+/* i_op.c */
-+extern struct inode_operations aufs_iop, aufs_symlink_iop, aufs_dir_iop;
-+int wr_dir(struct dentry *dentry, int negative, struct dentry *src_dentry,
-+ aufs_bindex_t force_btgt, int do_lock_srcdir);
-+
-+/* i_op_del.c */
-+int wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup,
-+ struct dentry *locked);
-+
-+/* iinfo.c */
-+struct aufs_iinfo *itoii(struct inode *inode);
-+aufs_bindex_t ibstart(struct inode *inode);
-+aufs_bindex_t ibend(struct inode *inode);
-+struct aufs_vdir *ivdir(struct inode *inode);
-+struct inode *au_h_iptr_i(struct inode *inode, aufs_bindex_t bindex);
-+struct inode *au_h_iptr(struct inode *inode);
-+aufs_bindex_t itoid_index(struct inode *inode, aufs_bindex_t bindex);
-+
-+void set_ibstart(struct inode *inode, aufs_bindex_t bindex);
-+void set_ibend(struct inode *inode, aufs_bindex_t bindex);
-+void set_ivdir(struct inode *inode, struct aufs_vdir *vdir);
-+void aufs_hiput(struct aufs_hinode *hinode);
-+#define AUFS_HI_XINO 1
-+#define AUFS_HI_NOTIFY 2
-+unsigned int au_hi_flags(struct inode *inode, int isdir);
-+void set_h_iptr(struct inode *inode, aufs_bindex_t bindex,
-+ struct inode *h_inode, unsigned int flags);
-+void au_update_iigen(struct inode *inode);
-+void au_update_brange(struct inode *inode, int do_put_zero);
-+
-+int au_iinfo_init(struct inode *inode);
-+void au_iinfo_fin(struct inode *inode);
-+
-+/* plink.c */
-+#ifdef CONFIG_AUFS_DEBUG
-+void au_list_plink(struct super_block *sb);
-+#else
-+static inline void au_list_plink(struct super_block *sb)
-+{
-+ /* nothing */
-+}
-+#endif
-+int au_is_plinked(struct super_block *sb, struct inode *inode);
-+struct dentry *lkup_plink(struct super_block *sb, aufs_bindex_t bindex,
-+ struct inode *inode);
-+void append_plink(struct super_block *sb, struct inode *inode,
-+ struct dentry *h_dentry, aufs_bindex_t bindex);
-+void au_put_plink(struct super_block *sb);
-+void half_refresh_plink(struct super_block *sb, aufs_bindex_t br_id);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* lock subclass for hidden inode */
-+/* default MAX_LOCKDEP_SUBCLASSES(8) is not enough */
-+// todo: reduce it by dcsub.
-+enum {
-+ AuLsc_Begin = I_MUTEX_QUOTA,
-+ AuLsc_HI_GPARENT, /* setattr with inotify */
-+ AuLsc_HI_PARENT, /* hidden inode, parent first */
-+ AuLsc_HI_CHILD,
-+ AuLsc_HI_PARENT2, /* copyup dirs */
-+ AuLsc_HI_CHILD2,
-+ AuLsc_End
-+};
-+
-+/* simple abstraction */
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
-+static inline void i_lock(struct inode *i)
-+{
-+ down(&i->i_sem);
-+}
-+
-+static inline void i_unlock(struct inode *i)
-+{
-+ up(&i->i_sem);
-+}
-+
-+static inline int i_trylock(struct inode *i)
-+{
-+ return down_trylock(&i->i_sem);
-+}
-+
-+static inline void hi_lock(struct inode *i, unsigned int lsc)
-+{
-+ i_lock(i);
-+}
-+
-+#define IMustLock(i) DEBUG_ON(!down_trylock(&(i)->i_sem))
-+#else
-+static inline void i_lock(struct inode *i)
-+{
-+ mutex_lock(&i->i_mutex);
-+}
-+
-+static inline void i_unlock(struct inode *i)
-+{
-+ mutex_unlock(&i->i_mutex);
-+}
-+
-+static inline int i_trylock(struct inode *i)
-+{
-+ return mutex_trylock(&i->i_mutex);
-+}
-+
-+static inline void hi_lock(struct inode *i, unsigned int lsc)
-+{
-+ mutex_lock_nested(&i->i_mutex, lsc);
-+}
-+
-+#define IMustLock(i) MtxMustLock(&(i)->i_mutex)
-+#endif
-+
-+/*
-+ * hi_lock_gparent, hi_lock_parent, hi_lock_parent2, hi_lock_child,
-+ * hi_lock_child2, hi_lock_whplink
-+ */
-+#define LockFunc(name, lsc) \
-+static inline void hi_lock_##name(struct inode *h_i) \
-+{hi_lock(h_i, AuLsc_HI_##lsc);}
-+
-+LockFunc(gparent, GPARENT);
-+LockFunc(parent, PARENT);
-+LockFunc(parent2, PARENT2);
-+LockFunc(child, CHILD);
-+LockFunc(child2, CHILD2);
-+LockFunc(whplink, CHILD2); /* sharing lock-subclass */
-+
-+#undef LockFunc
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* tiny test for inode number */
-+/* tmpfs generation is too rough */
-+static inline int au_test_higen(struct inode *inode, struct inode *h_inode)
-+{
-+ //IiMustAnyLock(inode);
-+ return !(itoii(inode)->ii_hsb1 == h_inode->i_sb
-+ && inode->i_generation == h_inode->i_generation);
-+}
-+
-+static inline int au_iigen(struct inode *inode)
-+{
-+ return atomic_read(&itoii(inode)->ii_generation);
-+}
-+
-+#ifdef CONFIG_AUFS_HINOTIFY
-+static inline void au_iigen_dec(struct inode *inode)
-+{
-+ //Dbg("i%lu\n", inode->i_ino);
-+ atomic_dec(&itoii(inode)->ii_generation);
-+}
-+
-+/* hinotify.c */
-+int alloc_hinotify(struct aufs_hinode *hinode, struct inode *inode,
-+ struct inode *h_inode);
-+void do_free_hinotify(struct aufs_hinode *hinode);
-+void do_hdir_lock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex,
-+ unsigned int lsc);
-+void hdir_unlock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex);
-+void hdir_lock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir);
-+void hdir_unlock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir);
-+void au_reset_hinotify(struct inode *inode, unsigned int flags);
-+int __init au_inotify_init(void);
-+void au_inotify_fin(void);
-+#else
-+static inline
-+int alloc_hinotify(struct aufs_hinode *hinode, struct inode *inode,
-+ struct inode *h_inode)
-+{
-+ return -EOPNOTSUPP;
-+}
-+
-+static inline void do_free_hinotify(struct aufs_hinode *hinode)
-+{
-+ /* nothing */
-+}
-+
-+static inline
-+void do_hdir_lock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex,
-+ unsigned int lsc)
-+{
-+ hi_lock(h_dir, lsc);
-+}
-+
-+static inline
-+void hdir_unlock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex)
-+{
-+ i_unlock(h_dir);
-+}
-+
-+static inline
-+void hdir_lock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir)
-+{
-+ vfsub_lock_rename(h_parents[0], h_parents[1]);
-+}
-+
-+static inline
-+void hdir_unlock_rename(struct dentry **h_parents, struct inode **dirs,
-+ aufs_bindex_t bindex, int issamedir)
-+{
-+ vfsub_unlock_rename(h_parents[0], h_parents[1]);
-+}
-+
-+static inline void au_reset_hinotify(struct inode *inode, unsigned int flags)
-+{
-+ /* nothing */
-+}
-+
-+#define au_inotify_init() 0
-+#define au_inotify_fin() /* */
-+#endif /* CONFIG_AUFS_HINOTIFY */
-+
-+static inline void free_hinotify(struct inode *inode, aufs_bindex_t bindex)
-+{
-+ do_free_hinotify(itoii(inode)->ii_hinode + bindex);
-+}
-+
-+/*
-+ * hgdir_lock, hdir_lock, hdir2_lock
-+ */
-+#define LockFunc(name, lsc) \
-+static inline \
-+void name##_lock(struct inode *h_dir, struct inode *dir, aufs_bindex_t bindex) \
-+{do_hdir_lock(h_dir, dir, bindex, AuLsc_HI_##lsc);}
-+
-+LockFunc(hgdir, GPARENT);
-+LockFunc(hdir, PARENT);
-+LockFunc(hdir2, PARENT2);
-+
-+#undef LockFunc
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* lock subclass for iinfo */
-+enum {
-+ AuLsc_II_CHILD, /* child first */
-+ AuLsc_II_CHILD2, /* rename(2), link(2), and cpup at hinotify */
-+ AuLsc_II_CHILD3, /* copyup dirs */
-+ AuLsc_II_PARENT,
-+ AuLsc_II_PARENT2,
-+ AuLsc_II_PARENT3,
-+ AuLsc_II_NEW /* new inode */
-+};
-+
-+/*
-+ * ii_read_lock_child, ii_write_lock_child,
-+ * ii_read_lock_child2, ii_write_lock_child2,
-+ * ii_read_lock_child3, ii_write_lock_child3,
-+ * ii_read_lock_parent, ii_write_lock_parent,
-+ * ii_read_lock_parent2, ii_write_lock_parent2,
-+ * ii_read_lock_parent3, ii_write_lock_parent3,
-+ * ii_read_lock_new, ii_write_lock_new
-+ */
-+#define ReadLockFunc(name, lsc) \
-+static inline void ii_read_lock_##name(struct inode *i) \
-+{rw_read_lock_nested(&itoii(i)->ii_rwsem, AuLsc_II_##lsc);}
-+
-+#define WriteLockFunc(name, lsc) \
-+static inline void ii_write_lock_##name(struct inode *i) \
-+{rw_write_lock_nested(&itoii(i)->ii_rwsem, AuLsc_II_##lsc);}
-+
-+#define RWLockFuncs(name, lsc) \
-+ ReadLockFunc(name, lsc); \
-+ WriteLockFunc(name, lsc)
-+
-+RWLockFuncs(child, CHILD);
-+RWLockFuncs(child2, CHILD2);
-+RWLockFuncs(child3, CHILD3);
-+RWLockFuncs(parent, PARENT);
-+RWLockFuncs(parent2, PARENT2);
-+RWLockFuncs(parent3, PARENT3);
-+RWLockFuncs(new, NEW);
-+
-+#undef ReadLockFunc
-+#undef WriteLockFunc
-+#undef RWLockFunc
-+
-+/*
-+ * ii_read_unlock, ii_write_unlock, ii_downgrade_lock
-+ */
-+SimpleUnlockRwsemFuncs(ii, struct inode *i, itoii(i)->ii_rwsem);
-+
-+/* to debug easier, do not make them inlined functions */
-+#define IiMustReadLock(i) do { \
-+ SiMustAnyLock((i)->i_sb); \
-+ RwMustReadLock(&itoii(i)->ii_rwsem); \
-+} while (0)
-+
-+#define IiMustWriteLock(i) do { \
-+ SiMustAnyLock((i)->i_sb); \
-+ RwMustWriteLock(&itoii(i)->ii_rwsem); \
-+} while (0)
-+
-+#define IiMustAnyLock(i) do { \
-+ SiMustAnyLock((i)->i_sb); \
-+ RwMustAnyLock(&itoii(i)->ii_rwsem); \
-+} while (0)
-+
-+#define IiMustNoWaiters(i) RwMustNoWaiters(&itoii(i)->ii_rwsem)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_INODE_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/misc.c linux-2.6.22.1/fs/aufs/misc.c
---- linux-2.6.22.1.oorig/fs/aufs/misc.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/misc.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,228 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: misc.c,v 1.31 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+//#include <linux/namei.h>
-+//#include <linux/mm.h>
-+//#include <asm/uaccess.h>
-+#include "aufs.h"
-+
-+void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp)
-+{
-+ void *q;
-+
-+ LKTRTrace("p %p, nused %d, sz %d, ksize %d\n",
-+ p, nused, new_sz, ksize(p));
-+ DEBUG_ON(new_sz <= 0);
-+ if (new_sz <= nused)
-+ return p;
-+ if (new_sz <= ksize(p)) {
-+ memset(p + nused, 0, new_sz - nused);
-+ return p;
-+ }
-+
-+ q = kmalloc(new_sz, gfp);
-+ //q = NULL;
-+ if (unlikely(!q))
-+ return NULL;
-+ memcpy(q, p, nused);
-+ memset(q + nused, 0, new_sz - nused);
-+ //smp_mb();
-+ kfree(p);
-+ return q;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+// todo: make it inline
-+struct nameidata *fake_dm(struct nameidata *fake_nd, struct nameidata *nd,
-+ struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ LKTRTrace("nd %p, b%d\n", nd, bindex);
-+
-+ if (!nd)
-+ return NULL;
-+
-+ fake_nd->dentry = NULL;
-+ fake_nd->mnt = NULL;
-+
-+#ifndef CONFIG_AUFS_FAKE_DM
-+ DiMustAnyLock(nd->dentry);
-+
-+ if (bindex <= dbend(nd->dentry))
-+ fake_nd->dentry = au_h_dptr_i(nd->dentry, bindex);
-+ if (fake_nd->dentry) {
-+ dget(fake_nd->dentry);
-+ fake_nd->mnt = sbr_mnt(sb, bindex);
-+ DEBUG_ON(!fake_nd->mnt);
-+ mntget(fake_nd->mnt);
-+ } else
-+ fake_nd = ERR_PTR(-ENOENT);
-+#endif
-+
-+ TraceErrPtr(fake_nd);
-+ return fake_nd;
-+}
-+
-+void fake_dm_release(struct nameidata *fake_nd)
-+{
-+#ifndef CONFIG_AUFS_FAKE_DM
-+ if (fake_nd) {
-+ mntput(fake_nd->mnt);
-+ dput(fake_nd->dentry);
-+ }
-+#endif
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int au_copy_file(struct file *dst, struct file *src, loff_t len,
-+ struct super_block *sb, int *sparse)
-+{
-+ int err, all_zero, dlgt;
-+ unsigned long blksize;
-+ char *buf;
-+ /* reduce stack space */
-+ struct iattr *ia;
-+
-+ LKTRTrace("%.*s, %.*s\n",
-+ DLNPair(dst->f_dentry), DLNPair(src->f_dentry));
-+ DEBUG_ON(!(dst->f_mode & FMODE_WRITE));
-+ IMustLock(dst->f_dentry->d_parent->d_inode);
-+
-+ err = -ENOMEM;
-+ blksize = dst->f_dentry->d_sb->s_blocksize;
-+ if (!blksize || PAGE_SIZE < blksize)
-+ blksize = PAGE_SIZE;
-+ LKTRTrace("blksize %lu\n", blksize);
-+ buf = kmalloc(blksize, GFP_KERNEL);
-+ //buf = NULL;
-+ if (unlikely(!buf))
-+ goto out;
-+ ia = kmalloc(sizeof(*ia), GFP_KERNEL);
-+ if (unlikely(!ia))
-+ goto out_buf;
-+
-+ dlgt = need_dlgt(sb);
-+ err = all_zero = 0;
-+ dst->f_pos = src->f_pos = 0;
-+ while (len) {
-+ size_t sz, rbytes, wbytes, i;
-+ char *p;
-+
-+ LKTRTrace("len %lld\n", len);
-+ sz = blksize;
-+ if (len < blksize)
-+ sz = len;
-+
-+ /* support LSM and notify */
-+ rbytes = 0;
-+ while (!rbytes || err == -EAGAIN || err == -EINTR)
-+ err = rbytes = vfsub_read_k(src, buf, sz, &src->f_pos,
-+ dlgt);
-+ if (unlikely(err < 0))
-+ break;
-+
-+ all_zero = 0;
-+ if (len >= rbytes && rbytes == blksize) {
-+ all_zero = 1;
-+ p = buf;
-+ for (i = 0; all_zero && i < rbytes; i++)
-+ all_zero = !*p++;
-+ }
-+ if (!all_zero) {
-+ wbytes = rbytes;
-+ p = buf;
-+ while (wbytes) {
-+ size_t b;
-+ /* support LSM and notify */
-+ err = b = vfsub_write_k(dst, p, wbytes,
-+ &dst->f_pos, dlgt);
-+ if (unlikely(err == -EAGAIN || err == -EINTR))
-+ continue;
-+ if (unlikely(err < 0))
-+ break;
-+ wbytes -= b;
-+ p += b;
-+ }
-+ } else {
-+ loff_t res;
-+ LKTRLabel(hole);
-+ *sparse = 1;
-+ err = res = vfsub_llseek(dst, rbytes, SEEK_CUR);
-+ if (unlikely(res < 0))
-+ break;
-+ }
-+ len -= rbytes;
-+ err = 0;
-+ }
-+
-+ /* the last block may be a hole */
-+ if (unlikely(!err && all_zero)) {
-+ struct dentry *h_d = dst->f_dentry;
-+ struct inode *h_i = h_d->d_inode;
-+
-+ LKTRLabel(last hole);
-+ do {
-+ err = vfsub_write_k(dst, "\0", 1, &dst->f_pos, dlgt);
-+ } while (err == -EAGAIN || err == -EINTR);
-+ if (err == 1) {
-+ ia->ia_size = dst->f_pos;
-+ ia->ia_valid = ATTR_SIZE | ATTR_FILE;
-+ ia->ia_file = dst;
-+ hi_lock_child2(h_i);
-+ err = vfsub_notify_change(h_d, ia, dlgt);
-+ i_unlock(h_i);
-+ }
-+ }
-+
-+ kfree(ia);
-+ out_buf:
-+ kfree(buf);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int test_ro(struct super_block *sb, aufs_bindex_t bindex, struct inode *inode)
-+{
-+ int err;
-+
-+ err = br_rdonly(stobr(sb, bindex));
-+ if (!err && inode) {
-+ struct inode *hi = au_h_iptr_i(inode, bindex);
-+ if (hi)
-+ err = IS_IMMUTABLE(hi) ? -EROFS : 0;
-+ }
-+ return err;
-+}
-+
-+int au_test_perm(struct inode *hidden_inode, int mask, int dlgt)
-+{
-+ if (!current->fsuid)
-+ return 0;
-+ if (unlikely(au_is_nfs(hidden_inode->i_sb)
-+ && (mask & MAY_WRITE)
-+ && S_ISDIR(hidden_inode->i_mode)))
-+ mask |= MAY_READ; /* force permission check */
-+ return vfsub_permission(hidden_inode, mask, NULL, dlgt);
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/misc.h linux-2.6.22.1/fs/aufs/misc.h
---- linux-2.6.22.1.oorig/fs/aufs/misc.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/misc.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,187 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: misc.h,v 1.25 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_MISC_H__
-+#define __AUFS_MISC_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/namei.h>
-+#include <linux/sched.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#define I_MUTEX_QUOTA 0
-+#define lockdep_off() /* */
-+#define lockdep_on() /* */
-+#define mutex_lock_nested(mtx, lsc) mutex_lock(mtx)
-+#define down_write_nested(rw, lsc) down_write(rw)
-+#define down_read_nested(rw, lsc) down_read(rw)
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_rwsem {
-+ struct rw_semaphore rwsem;
-+#ifdef CONFIG_AUFS_DEBUG
-+ atomic_t rcnt;
-+#endif
-+};
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+#define DbgRcntInit(rw) atomic_set(&(rw)->rcnt, 0)
-+#define DbgRcntInc(rw) atomic_inc(&(rw)->rcnt)
-+#define DbgRcntDec(rw) WARN_ON(atomic_dec_return(&(rw)->rcnt) < 0)
-+#else
-+#define DbgRcntInit(rw) /* */
-+#define DbgRcntInc(rw) /* */
-+#define DbgRcntDec(rw) /* */
-+#endif
-+
-+static inline void rw_init_nolock(struct aufs_rwsem *rw)
-+{
-+ DbgRcntInit(rw);
-+ init_rwsem(&rw->rwsem);
-+}
-+
-+static inline void rw_init_wlock(struct aufs_rwsem *rw)
-+{
-+ rw_init_nolock(rw);
-+ down_write(&rw->rwsem);
-+}
-+
-+static inline void rw_init_wlock_nested(struct aufs_rwsem *rw, unsigned int lsc)
-+{
-+ rw_init_nolock(rw);
-+ down_write_nested(&rw->rwsem, lsc);
-+}
-+
-+static inline void rw_read_lock(struct aufs_rwsem *rw)
-+{
-+ down_read(&rw->rwsem);
-+ DbgRcntInc(rw);
-+}
-+
-+static inline void rw_read_lock_nested(struct aufs_rwsem *rw, unsigned int lsc)
-+{
-+ down_read_nested(&rw->rwsem, lsc);
-+ DbgRcntInc(rw);
-+}
-+
-+static inline void rw_read_unlock(struct aufs_rwsem *rw)
-+{
-+ DbgRcntDec(rw);
-+ up_read(&rw->rwsem);
-+}
-+
-+static inline void rw_dgrade_lock(struct aufs_rwsem *rw)
-+{
-+ DbgRcntInc(rw);
-+ downgrade_write(&rw->rwsem);
-+}
-+
-+static inline void rw_write_lock(struct aufs_rwsem *rw)
-+{
-+ down_write(&rw->rwsem);
-+}
-+
-+static inline void rw_write_lock_nested(struct aufs_rwsem *rw, unsigned int lsc)
-+{
-+ down_write_nested(&rw->rwsem, lsc);
-+}
-+
-+static inline void rw_write_unlock(struct aufs_rwsem *rw)
-+{
-+ up_write(&rw->rwsem);
-+}
-+
-+#if 0 // why is not _nested version defined
-+static inline int rw_read_trylock(struct aufs_rwsem *rw)
-+{
-+ int ret = down_read_trylock(&rw->rwsem);
-+ if (ret)
-+ DbgRcntInc(rw);
-+ return ret;
-+}
-+
-+static inline int rw_write_trylock(struct aufs_rwsem *rw)
-+{
-+ return down_write_trylock(&rw->rwsem);
-+}
-+#endif
-+
-+#undef DbgRcntInit
-+#undef DbgRcntInc
-+#undef DbgRcntDec
-+
-+/* to debug easier, do not make them inlined functions */
-+#define RwMustNoWaiters(rw) DEBUG_ON(!list_empty(&(rw)->rwsem.wait_list))
-+#define RwMustAnyLock(rw) DEBUG_ON(down_write_trylock(&(rw)->rwsem))
-+#ifdef CONFIG_AUFS_DEBUG
-+#define RwMustReadLock(rw) do { \
-+ RwMustAnyLock(rw); \
-+ DEBUG_ON(!atomic_read(&(rw)->rcnt)); \
-+} while (0)
-+#define RwMustWriteLock(rw) do { \
-+ RwMustAnyLock(rw); \
-+ DEBUG_ON(atomic_read(&(rw)->rcnt)); \
-+} while (0)
-+#else
-+#define RwMustReadLock(rw) RwMustAnyLock(rw)
-+#define RwMustWriteLock(rw) RwMustAnyLock(rw)
-+#endif
-+
-+#define SimpleLockRwsemFuncs(prefix, param, rwsem) \
-+static inline void prefix##_read_lock(param) {rw_read_lock(&(rwsem));} \
-+static inline void prefix##_write_lock(param) {rw_write_lock(&(rwsem));}
-+//static inline void prefix##_read_trylock(param) {rw_read_trylock(&(rwsem));}
-+//static inline void prefix##_write_trylock(param) {rw_write_trylock(&(rwsem));}
-+//static inline void prefix##_read_trylock_nested(param, lsc)
-+//{rw_read_trylock_nested(&(rwsem, lsc));}
-+//static inline void prefix##_write_trylock_nestd(param, lsc)
-+//{rw_write_trylock_nested(&(rwsem), nested);}
-+
-+#define SimpleUnlockRwsemFuncs(prefix, param, rwsem) \
-+static inline void prefix##_read_unlock(param) {rw_read_unlock(&(rwsem));} \
-+static inline void prefix##_write_unlock(param) {rw_write_unlock(&(rwsem));} \
-+static inline void prefix##_downgrade_lock(param) {rw_dgrade_lock(&(rwsem));}
-+
-+#define SimpleRwsemFuncs(prefix, param, rwsem) \
-+ SimpleLockRwsemFuncs(prefix, param, rwsem); \
-+ SimpleUnlockRwsemFuncs(prefix, param, rwsem)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+typedef ssize_t (*readf_t)(struct file*, char __user*, size_t, loff_t*);
-+typedef ssize_t (*writef_t)(struct file*, const char __user*, size_t, loff_t*);
-+
-+void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp);
-+struct nameidata *fake_dm(struct nameidata *fake_nd, struct nameidata *nd,
-+ struct super_block *sb, aufs_bindex_t bindex);
-+void fake_dm_release(struct nameidata *fake_nd);
-+int au_copy_file(struct file *dst, struct file *src, loff_t len,
-+ struct super_block *sb, int *sparse);
-+int test_ro(struct super_block *sb, aufs_bindex_t bindex, struct inode *inode);
-+int au_test_perm(struct inode *h_inode, int mask, int dlgt);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_MISC_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/module.c linux-2.6.22.1/fs/aufs/module.c
---- linux-2.6.22.1.oorig/fs/aufs/module.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/module.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,334 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: module.c,v 1.9 2007/04/30 05:46:32 sfjro Exp $ */
-+
-+//#include <linux/init.h>
-+//#include <linux/kobject.h>
-+#include <linux/module.h>
-+//#include <linux/seq_file.h>
-+//#include <linux/sysfs.h>
-+#include "aufs.h"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * aufs caches
-+ */
-+struct kmem_cache *aufs_cachep[AuCache_Last];
-+static int __init create_cache(void)
-+{
-+#define Cache(type) kmem_cache_create(#type, sizeof(struct type), 0, \
-+ SLAB_RECLAIM_ACCOUNT, NULL, NULL)
-+
-+ if ((aufs_cachep[AuCache_DINFO] = Cache(aufs_dinfo))
-+ && (aufs_cachep[AuCache_ICNTNR] = Cache(aufs_icntnr))
-+ && (aufs_cachep[AuCache_FINFO] = Cache(aufs_finfo))
-+ //&& (aufs_cachep[AuCache_FINFO] = NULL)
-+ && (aufs_cachep[AuCache_VDIR] = Cache(aufs_vdir))
-+ && (aufs_cachep[AuCache_DEHSTR] = Cache(aufs_dehstr))
-+ && (aufs_cachep[AuCache_HINOTIFY] = Cache(aufs_hinotify)))
-+ return 0;
-+ return -ENOMEM;
-+
-+#undef Cache
-+}
-+
-+static void destroy_cache(void)
-+{
-+ int i;
-+ for (i = 0; i < AuCache_Last; i++)
-+ if (aufs_cachep[i])
-+ kmem_cache_destroy(aufs_cachep[i]);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+char au_esc_chars[0x20 + 3]; /* 0x01-0x20, backslash, del, and NULL */
-+int au_dir_roflags;
-+extern struct file_system_type aufs_fs_type;
-+
-+#ifdef DbgDlgt
-+#include <linux/security.h>
-+#include "dbg_dlgt.c"
-+#else
-+#define dbg_dlgt_init() 0
-+#define dbg_dlgt_fin() /* */
-+#endif
-+
-+/*
-+ * functions for module interface.
-+ */
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("Junjiro Okajima");
-+MODULE_DESCRIPTION(AUFS_NAME " -- Another unionfs");
-+MODULE_VERSION(AUFS_VERSION);
-+
-+/* it should be 'byte', but param_set_byte() prints by "%c" */
-+short aufs_nwkq = AUFS_NWKQ_DEF;
-+MODULE_PARM_DESC(nwkq, "the number of workqueue thread, " AUFS_WKQ_NAME);
-+module_param_named(nwkq, aufs_nwkq, short, 0444);
-+
-+int sysaufs_brs = 0;
-+MODULE_PARM_DESC(brs, "use <sysfs>/fs/aufs/brs");
-+module_param_named(brs, sysaufs_brs, int, 0444);
-+
-+static int __init aufs_init(void)
-+{
-+ int err, i;
-+ char *p;
-+
-+ //sbinfo->si_xino is atomic_long_t
-+ BUILD_BUG_ON(sizeof(ino_t) != sizeof(long));
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+ {
-+ struct aufs_destr destr;
-+ destr.len = -1;
-+ DEBUG_ON(destr.len < NAME_MAX);
-+ }
-+
-+#ifdef CONFIG_4KSTACKS
-+ printk("CONFIG_4KSTACKS is defined.\n");
-+#endif
-+#if 0 // verbose debug
-+ {
-+ union {
-+ struct aufs_branch *br;
-+ struct aufs_dinfo *di;
-+ struct aufs_finfo *fi;
-+ struct aufs_iinfo *ii;
-+ struct aufs_hinode *hi;
-+ struct aufs_sbinfo *si;
-+ struct aufs_destr *destr;
-+ struct aufs_de *de;
-+ struct aufs_wh *wh;
-+ struct aufs_vdir *vd;
-+ } u;
-+
-+ printk("br{"
-+ "xino %d, readf %d, writef %d, "
-+ "id %d, perm %d, mnt %d, count %d, "
-+ "wh_sem %d, wh %d, run %d} %d\n",
-+ offsetof(typeof(*u.br), br_xino),
-+ offsetof(typeof(*u.br), br_xino_read),
-+ offsetof(typeof(*u.br), br_xino_write),
-+ offsetof(typeof(*u.br), br_id),
-+ offsetof(typeof(*u.br), br_perm),
-+ offsetof(typeof(*u.br), br_mnt),
-+ offsetof(typeof(*u.br), br_count),
-+ offsetof(typeof(*u.br), br_wh_rwsem),
-+ offsetof(typeof(*u.br), br_wh),
-+ offsetof(typeof(*u.br), br_wh_running),
-+ sizeof(*u.br));
-+ printk("di{gen %d, rwsem %d, bstart %d, bend %d, bwh %d, "
-+ "bdiropq %d, hdentry %d, reval %d} %d\n",
-+ offsetof(typeof(*u.di), di_generation),
-+ offsetof(typeof(*u.di), di_rwsem),
-+ offsetof(typeof(*u.di), di_bstart),
-+ offsetof(typeof(*u.di), di_bend),
-+ offsetof(typeof(*u.di), di_bwh),
-+ offsetof(typeof(*u.di), di_bdiropq),
-+ offsetof(typeof(*u.di), di_hdentry),
-+ offsetof(typeof(*u.di), di_reval),
-+ sizeof(*u.di));
-+ printk("fi{gen %d, rwsem %d, hfile %d, bstart %d, bend %d, "
-+ "h_vm_ops %d, vdir_cach %d} %d\n",
-+ offsetof(typeof(*u.fi), fi_generation),
-+ offsetof(typeof(*u.fi), fi_rwsem),
-+ offsetof(typeof(*u.fi), fi_hfile),
-+ offsetof(typeof(*u.fi), fi_bstart),
-+ offsetof(typeof(*u.fi), fi_bend),
-+ offsetof(typeof(*u.fi), fi_h_vm_ops),
-+ offsetof(typeof(*u.fi), fi_vdir_cache),
-+ sizeof(*u.fi));
-+ printk("ii{rwsem %d, bstart %d, bend %d, hinode %d, vdir %d} "
-+ "%d\n",
-+ offsetof(typeof(*u.ii), ii_rwsem),
-+ offsetof(typeof(*u.ii), ii_bstart),
-+ offsetof(typeof(*u.ii), ii_bend),
-+ offsetof(typeof(*u.ii), ii_hinode),
-+ offsetof(typeof(*u.ii), ii_vdir),
-+ sizeof(*u.ii));
-+ printk("hi{inode %d, id %d, notify %d} %d\n",
-+ offsetof(typeof(*u.hi), hi_inode),
-+ offsetof(typeof(*u.hi), hi_id),
-+ offsetof(typeof(*u.hi), hi_notify),
-+ sizeof(*u.hi));
-+ printk("si{rwsem %d, gen %d, "
-+ "failed_refresh %d, "
-+ "bend %d, last id %d, br %d, "
-+ "flags %d, "
-+ "xino %d, "
-+ "rdcache %d, "
-+ "dirwh %d, "
-+ "pl_lock %d, pl %d, "
-+ "kobj %d} %d\n",
-+ offsetof(typeof(*u.si), si_rwsem),
-+ offsetof(typeof(*u.si), si_generation),
-+ -1,//offsetof(typeof(*u.si), si_failed_refresh_dirs),
-+ offsetof(typeof(*u.si), si_bend),
-+ offsetof(typeof(*u.si), si_last_br_id),
-+ offsetof(typeof(*u.si), si_branch),
-+ offsetof(typeof(*u.si), si_flags),
-+ offsetof(typeof(*u.si), si_xino),
-+ offsetof(typeof(*u.si), si_rdcache),
-+ offsetof(typeof(*u.si), si_dirwh),
-+ offsetof(typeof(*u.si), si_plink_lock),
-+ offsetof(typeof(*u.si), si_plink),
-+ offsetof(typeof(*u.si), si_kobj),
-+ sizeof(*u.si));
-+ printk("destr{len %d, name %d} %d\n",
-+ offsetof(typeof(*u.destr), len),
-+ offsetof(typeof(*u.destr), name),
-+ sizeof(*u.destr));
-+ printk("de{ino %d, type %d, str %d} %d\n",
-+ offsetof(typeof(*u.de), de_ino),
-+ offsetof(typeof(*u.de), de_type),
-+ offsetof(typeof(*u.de), de_str),
-+ sizeof(*u.de));
-+ printk("wh{hash %d, bindex %d, str %d} %d\n",
-+ offsetof(typeof(*u.wh), wh_hash),
-+ offsetof(typeof(*u.wh), wh_bindex),
-+ offsetof(typeof(*u.wh), wh_str),
-+ sizeof(*u.wh));
-+ printk("vd{deblk %d, nblk %d, last %d, ver %d, jiffy %d} %d\n",
-+ offsetof(typeof(*u.vd), vd_deblk),
-+ offsetof(typeof(*u.vd), vd_nblk),
-+ offsetof(typeof(*u.vd), vd_last),
-+ offsetof(typeof(*u.vd), vd_version),
-+ offsetof(typeof(*u.vd), vd_jiffy),
-+ sizeof(*u.vd));
-+ }
-+#endif
-+#endif
-+
-+ p = au_esc_chars;
-+ for (i = 1; i <= ' '; i++)
-+ *p++ = i;
-+ *p++ = '\\';
-+ *p++ = '\x7f';
-+ *p = 0;
-+
-+ au_dir_roflags = au_file_roflags(O_DIRECTORY | O_LARGEFILE);
-+#ifndef CONFIG_AUFS_SYSAUFS
-+ sysaufs_brs = 0;
-+#endif
-+
-+ err = -EINVAL;
-+ if (unlikely(aufs_nwkq <= 0))
-+ goto out;
-+ err = create_cache();
-+ if (unlikely(err))
-+ goto out;
-+ err = sysaufs_init();
-+ if (unlikely(err))
-+ goto out_cache;
-+ err = au_wkq_init();
-+ if (unlikely(err))
-+ goto out_kobj;
-+ err = au_inotify_init();
-+ if (unlikely(err))
-+ goto out_wkq;
-+ err = dbg_dlgt_init();
-+ if (unlikely(err))
-+ goto out_inotify;
-+ err = register_filesystem(&aufs_fs_type);
-+ if (unlikely(err))
-+ goto out_dlgt;
-+ printk(AUFS_NAME " " AUFS_VERSION "\n");
-+ return 0; /* success */
-+
-+ out_dlgt:
-+ dbg_dlgt_fin();
-+ out_inotify:
-+ au_inotify_fin();
-+ out_wkq:
-+ au_wkq_fin();
-+ out_kobj:
-+ sysaufs_fin();
-+ out_cache:
-+ destroy_cache();
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static void __exit aufs_exit(void)
-+{
-+ unregister_filesystem(&aufs_fs_type);
-+ dbg_dlgt_fin();
-+ au_inotify_fin();
-+ au_wkq_fin();
-+ sysaufs_fin();
-+ destroy_cache();
-+}
-+
-+module_init(aufs_init);
-+module_exit(aufs_exit);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+// fake Kconfig
-+#if 1
-+#ifdef CONFIG_AUFS_HINOTIFY
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#error CONFIG_AUFS_HINOTIFY is supported in linux-2.6.18 and later.
-+#endif
-+#ifndef CONFIG_INOTIFY
-+#error enable CONFIG_INOTIFY to use CONFIG_AUFS_HINOTIFY.
-+#endif
-+#endif
-+
-+#if AUFS_BRANCH_MAX > 511 && BITS_PER_LONG == 64 && PAGE_SIZE == 4096
-+#warning For 4k pagesize and 64bit environment, \
-+ CONFIG_AUFS_BRANCH_MAX_511 or smaller is recommended.
-+#endif
-+
-+#ifdef CONFIG_AUFS_SYSAUFS
-+#ifndef CONFIG_SYSFS
-+#error CONFIG_AUFS_SYSAUFS requires CONFIG_SYSFS.
-+#endif
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#error CONFIG_AUFS_SYSAUFS requires linux-2.6.18 and later.
-+#endif
-+#endif
-+
-+#ifdef CONFIG_AUFS_EXPORT
-+#if !defined(CONFIG_EXPORTFS) && !defined(CONFIG_EXPORTFS_MODULE)
-+#error CONFIG_AUFS_EXPORT requires CONFIG_EXPORTFS
-+#endif
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#error CONFIG_AUFS_EXPORT requires linux-2.6.18 and later.
-+#endif
-+#if defined(CONFIG_EXPORTFS_MODULE) && defined(CONFIG_AUFS)
-+#error need CONFIG_EXPORTFS=y to link aufs statically with CONFIG_AUFS_EXPORT
-+#endif
-+#endif
-+
-+#ifdef CONFIG_DEBUG_PROVE_LOCKING
-+#if MAX_LOCKDEP_SUBCLASSES < AuLsc_End
-+#warning lockdep will not work since aufs uses deeper locks.
-+#endif
-+#endif
-+
-+#ifdef CONFIG_AUFS_COMPAT
-+#warning CONFIG_AUFS_COMPAT will be removed in the near future.
-+#endif
-+
-+#endif
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/module.h linux-2.6.22.1/fs/aufs/module.h
---- linux-2.6.22.1.oorig/fs/aufs/module.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/module.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,60 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: module.h,v 1.8 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_MODULE_H__
-+#define __AUFS_MODULE_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/slab.h>
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* module parameters */
-+extern short aufs_nwkq;
-+extern int sysaufs_brs;
-+
-+/* ---------------------------------------------------------------------- */
-+
-+extern char au_esc_chars[];
-+extern int au_dir_roflags;
-+
-+/* kmem cache */
-+enum {AuCache_DINFO, AuCache_ICNTNR, AuCache_FINFO, AuCache_VDIR,
-+ AuCache_DEHSTR, AuCache_HINOTIFY, AuCache_Last};
-+extern struct kmem_cache *aufs_cachep[];
-+
-+#define CacheFuncs(name, index) \
-+static inline void *cache_alloc_##name(void) \
-+{return kmem_cache_alloc(aufs_cachep[index], GFP_KERNEL);} \
-+static inline void cache_free_##name(void *p) \
-+{kmem_cache_free(aufs_cachep[index], p);}
-+
-+CacheFuncs(dinfo, AuCache_DINFO);
-+CacheFuncs(icntnr, AuCache_ICNTNR);
-+CacheFuncs(finfo, AuCache_FINFO);
-+CacheFuncs(vdir, AuCache_VDIR);
-+CacheFuncs(dehstr, AuCache_DEHSTR);
-+CacheFuncs(hinotify, AuCache_HINOTIFY);
-+
-+#undef CacheFuncs
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_MODULE_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/opts.c linux-2.6.22.1/fs/aufs/opts.c
---- linux-2.6.22.1.oorig/fs/aufs/opts.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/opts.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,1043 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: opts.c,v 1.34 2007/05/14 03:40:27 sfjro Exp $ */
-+
-+#include <asm/types.h> // a distribution requires
-+#include <linux/parser.h>
-+#include "aufs.h"
-+
-+enum {
-+ Opt_br,
-+ Opt_add, Opt_del, Opt_mod, Opt_append, Opt_prepend,
-+ Opt_idel, Opt_imod,
-+ Opt_dirwh, Opt_rdcache, Opt_deblk, Opt_nhash,
-+ Opt_xino, Opt_zxino, Opt_noxino,
-+ Opt_plink, Opt_noplink, Opt_list_plink, Opt_clean_plink,
-+ Opt_udba,
-+ Opt_diropq_a, Opt_diropq_w,
-+ Opt_warn_perm, Opt_nowarn_perm,
-+ Opt_findrw_dir, Opt_findrw_br,
-+ Opt_coo,
-+ Opt_dlgt, Opt_nodlgt,
-+ Opt_tail, Opt_ignore, Opt_err
-+};
-+
-+static match_table_t options = {
-+ {Opt_br, "br=%s"},
-+ {Opt_br, "br:%s"},
-+
-+ {Opt_add, "add=%d:%s"},
-+ {Opt_add, "add:%d:%s"},
-+ {Opt_add, "ins=%d:%s"},
-+ {Opt_add, "ins:%d:%s"},
-+ {Opt_append, "append=%s"},
-+ {Opt_append, "append:%s"},
-+ {Opt_prepend, "prepend=%s"},
-+ {Opt_prepend, "prepend:%s"},
-+
-+ {Opt_del, "del=%s"},
-+ {Opt_del, "del:%s"},
-+ //{Opt_idel, "idel:%d"},
-+ {Opt_mod, "mod=%s"},
-+ {Opt_mod, "mod:%s"},
-+ //{Opt_imod, "imod:%d:%s"},
-+
-+ {Opt_dirwh, "dirwh=%d"},
-+ {Opt_dirwh, "dirwh:%d"},
-+
-+ {Opt_xino, "xino=%s"},
-+ {Opt_xino, "xino:%s"},
-+ {Opt_noxino, "noxino"},
-+ //{Opt_zxino, "zxino=%s"},
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
-+ {Opt_plink, "plink"},
-+ {Opt_noplink, "noplink"},
-+#ifdef CONFIG_AUFS_DEBUG
-+ {Opt_list_plink, "list_plink"},
-+#endif
-+ {Opt_clean_plink, "clean_plink"},
-+#endif
-+
-+ {Opt_udba, "udba=%s"},
-+
-+ {Opt_diropq_a, "diropq=always"},
-+ {Opt_diropq_a, "diropq=a"},
-+ {Opt_diropq_w, "diropq=whiteouted"},
-+ {Opt_diropq_w, "diropq=w"},
-+
-+ {Opt_warn_perm, "warn_perm"},
-+ {Opt_nowarn_perm, "nowarn_perm"},
-+
-+#ifdef CONFIG_AUFS_DLGT
-+ {Opt_dlgt, "dlgt"},
-+ {Opt_nodlgt, "nodlgt"},
-+#endif
-+
-+ {Opt_rdcache, "rdcache=%d"},
-+ {Opt_rdcache, "rdcache:%d"},
-+#if 0
-+ {Opt_findrw_dir, "findrw=dir"},
-+ {Opt_findrw_br, "findrw=br"},
-+
-+ {Opt_coo, "coo=%s"},
-+
-+ {Opt_deblk, "deblk=%d"},
-+ {Opt_deblk, "deblk:%d"},
-+ {Opt_nhash, "nhash=%d"},
-+ {Opt_nhash, "nhash:%d"},
-+#endif
-+
-+ {Opt_br, "dirs=%s"},
-+ {Opt_ignore, "debug=%d"},
-+ {Opt_ignore, "delete=whiteout"},
-+ {Opt_ignore, "delete=all"},
-+ {Opt_ignore, "imap=%s"},
-+
-+ {Opt_err, NULL}
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define RW "rw"
-+#define RO "ro"
-+#define WH "wh"
-+#define RR "rr"
-+#define NoLinkWH "nolwh"
-+
-+static match_table_t brperms = {
-+ {AuBr_RR, RR},
-+ {AuBr_RO, RO},
-+ {AuBr_RW, RW},
-+
-+ {AuBr_RRWH, RR "+" WH},
-+ {AuBr_ROWH, RO "+" WH},
-+ {AuBr_RWNoLinkWH, RW "+" NoLinkWH},
-+
-+ {AuBr_ROWH, "nfsro"},
-+ {AuBr_RO, NULL}
-+};
-+
-+static int br_perm_val(char *perm)
-+{
-+ int val;
-+ substring_t args[MAX_OPT_ARGS];
-+
-+ DEBUG_ON(!perm || !*perm);
-+ LKTRTrace("perm %s\n", perm);
-+ val = match_token(perm, brperms, args);
-+ TraceErr(val);
-+ return val;
-+}
-+
-+int br_perm_str(char *p, unsigned int len, int brperm)
-+{
-+ struct match_token *bp = brperms;
-+
-+ LKTRTrace("len %d, 0x%x\n", len, brperm);
-+
-+ while (bp->pattern) {
-+ if (bp->token == brperm) {
-+ if (strlen(bp->pattern) < len) {
-+ strcpy(p, bp->pattern);
-+ return 0;
-+ } else
-+ return -E2BIG;
-+ }
-+ bp++;
-+ }
-+
-+ return -EIO;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static match_table_t udbalevel = {
-+ {AuFlag_UDBA_REVAL, "reval"},
-+#ifdef CONFIG_AUFS_HINOTIFY
-+ {AuFlag_UDBA_INOTIFY, "inotify"},
-+#endif
-+ {AuFlag_UDBA_NONE, "none"},
-+ {-1, NULL}
-+};
-+
-+static int udba_val(char *str)
-+{
-+ substring_t args[MAX_OPT_ARGS];
-+ return match_token(str, udbalevel, args);
-+}
-+
-+au_parser_pattern_t udba_str(int udba)
-+{
-+ struct match_token *p = udbalevel;
-+ while (p->pattern) {
-+ if (p->token == udba)
-+ return p->pattern;
-+ p++;
-+ }
-+ BUG();
-+ return "??";
-+}
-+
-+void udba_set(struct super_block *sb, unsigned int flg)
-+{
-+ au_flag_clr(sb, AuMask_UDBA);
-+ au_flag_set(sb, flg);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static match_table_t coolevel = {
-+ {AuFlag_COO_LEAF, "leaf"},
-+ {AuFlag_COO_ALL, "all"},
-+ {AuFlag_COO_NONE, "none"},
-+ {-1, NULL}
-+};
-+
-+#if 0
-+static int coo_val(char *str)
-+{
-+ substring_t args[MAX_OPT_ARGS];
-+ return match_token(str, coolevel, args);
-+}
-+#endif
-+
-+au_parser_pattern_t coo_str(int coo)
-+{
-+ struct match_token *p = coolevel;
-+ while (p->pattern) {
-+ if (p->token == coo)
-+ return p->pattern;
-+ p++;
-+ }
-+ BUG();
-+ return "??";
-+}
-+static void coo_set(struct super_block *sb, unsigned int flg)
-+{
-+ au_flag_clr(sb, AuMask_COO);
-+ au_flag_set(sb, flg);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static const int lkup_dirflags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+static void dump_opts(struct opts *opts)
-+{
-+ /* reduce stack space */
-+ union {
-+ struct opt_add *add;
-+ struct opt_del *del;
-+ struct opt_mod *mod;
-+ struct opt_xino *xino;
-+ } u;
-+ struct opt *opt;
-+
-+ TraceEnter();
-+
-+ opt = opts->opt;
-+ while (/* opt < opts_tail && */ opt->type != Opt_tail) {
-+ switch (opt->type) {
-+ case Opt_add:
-+ u.add = &opt->add;
-+ LKTRTrace("add {b%d, %s, 0x%x, %p}\n",
-+ u.add->bindex, u.add->path, u.add->perm,
-+ u.add->nd.dentry);
-+ break;
-+ case Opt_del:
-+ case Opt_idel:
-+ u.del = &opt->del;
-+ LKTRTrace("del {%s, %p}\n", u.del->path, u.del->h_root);
-+ break;
-+ case Opt_mod:
-+ case Opt_imod:
-+ u.mod = &opt->mod;
-+ LKTRTrace("mod {%s, 0x%x, %p}\n",
-+ u.mod->path, u.mod->perm, u.mod->h_root);
-+ break;
-+ case Opt_append:
-+ u.add = &opt->add;
-+ LKTRTrace("append {b%d, %s, 0x%x, %p}\n",
-+ u.add->bindex, u.add->path, u.add->perm,
-+ u.add->nd.dentry);
-+ break;
-+ case Opt_prepend:
-+ u.add = &opt->add;
-+ LKTRTrace("prepend {b%d, %s, 0x%x, %p}\n",
-+ u.add->bindex, u.add->path, u.add->perm,
-+ u.add->nd.dentry);
-+ break;
-+ case Opt_dirwh:
-+ LKTRTrace("dirwh %d\n", opt->dirwh);
-+ break;
-+ case Opt_rdcache:
-+ LKTRTrace("rdcache %d\n", opt->rdcache);
-+ break;
-+ case Opt_xino:
-+ u.xino = &opt->xino;
-+ LKTRTrace("xino {%s %.*s}\n",
-+ u.xino->path, DLNPair(u.xino->file->f_dentry));
-+ break;
-+ case Opt_noxino:
-+ LKTRLabel(noxino);
-+ break;
-+ case Opt_plink:
-+ LKTRLabel(plink);
-+ break;
-+ case Opt_noplink:
-+ LKTRLabel(noplink);
-+ break;
-+ case Opt_list_plink:
-+ LKTRLabel(list_plink);
-+ break;
-+ case Opt_clean_plink:
-+ LKTRLabel(clean_plink);
-+ break;
-+ case Opt_udba:
-+ LKTRTrace("udba %d, %s\n",
-+ opt->udba, udba_str(opt->udba));
-+ break;
-+ case Opt_diropq_a:
-+ LKTRLabel(diropq_a);
-+ break;
-+ case Opt_diropq_w:
-+ LKTRLabel(diropq_w);
-+ break;
-+ case Opt_warn_perm:
-+ LKTRLabel(warn_perm);
-+ break;
-+ case Opt_nowarn_perm:
-+ LKTRLabel(nowarn_perm);
-+ break;
-+ case Opt_dlgt:
-+ LKTRLabel(dlgt);
-+ break;
-+ case Opt_nodlgt:
-+ LKTRLabel(nodlgt);
-+ break;
-+ case Opt_coo:
-+ LKTRTrace("coo %d, %s\n", opt->coo, coo_str(opt->coo));
-+ break;
-+ default:
-+ BUG();
-+ }
-+ opt++;
-+ }
-+}
-+#else
-+#define dump_opts(opts) /* */
-+#endif
-+
-+void au_free_opts(struct opts *opts)
-+{
-+ struct opt *opt;
-+
-+ TraceEnter();
-+
-+ opt = opts->opt;
-+ while (opt->type != Opt_tail) {
-+ switch (opt->type) {
-+ case Opt_add:
-+ case Opt_append:
-+ case Opt_prepend:
-+ path_release(&opt->add.nd);
-+ break;
-+ case Opt_del:
-+ case Opt_idel:
-+ dput(opt->del.h_root);
-+ break;
-+ case Opt_mod:
-+ case Opt_imod:
-+ dput(opt->mod.h_root);
-+ break;
-+ case Opt_xino:
-+ fput(opt->xino.file);
-+ break;
-+ }
-+ opt++;
-+ }
-+}
-+
-+static int opt_add(struct opt *opt, char *opt_str, struct super_block *sb,
-+ aufs_bindex_t bindex)
-+{
-+ int err;
-+ struct opt_add *add = &opt->add;
-+ char *p;
-+
-+ LKTRTrace("%s, b%d\n", opt_str, bindex);
-+
-+ add->bindex = bindex;
-+ add->perm = AuBr_RO;
-+ if (!bindex && !(sb->s_flags & MS_RDONLY))
-+ add->perm = AuBr_RW;
-+#ifdef CONFIG_AUFS_COMPAT
-+ add->perm = AuBr_RW;
-+#endif
-+ add->path = opt_str;
-+ p = strchr(opt_str, '=');
-+ if (unlikely(p)) {
-+ *p++ = 0;
-+ if (*p)
-+ add->perm = br_perm_val(p);
-+ }
-+
-+ // LSM may detect it
-+ // do not superio.
-+ err = path_lookup(add->path, lkup_dirflags, &add->nd);
-+ //err = -1;
-+ if (!err) {
-+ opt->type = Opt_add;
-+ goto out;
-+ }
-+ Err("lookup failed %s (%d)\n", add->path, err);
-+ err = -EINVAL;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* called without aufs lock */
-+int au_parse_opts(struct super_block *sb, char *str, struct opts *opts)
-+{
-+ int err, n;
-+ struct dentry *root;
-+ struct opt *opt, *opt_tail;
-+ char *opt_str;
-+ substring_t args[MAX_OPT_ARGS];
-+ aufs_bindex_t bindex;
-+ struct nameidata nd;
-+ /* reduce stack space */
-+ union {
-+ struct opt_del *del;
-+ struct opt_mod *mod;
-+ struct opt_xino *xino;
-+ } u;
-+ struct file *file;
-+
-+ LKTRTrace("%s, nopts %d\n", str, opts->max_opt);
-+
-+ root = sb->s_root;
-+ err = 0;
-+ bindex = 0;
-+ opt = opts->opt;
-+ opt_tail = opt + opts->max_opt - 1;
-+ opt->type = Opt_tail;
-+ while (!err && (opt_str = strsep(&str, ",")) && *opt_str) {
-+ int token, skipped;
-+ char *p;
-+ err = -EINVAL;
-+ token = match_token(opt_str, options, args);
-+ LKTRTrace("%s, token %d, args[0]{%p, %p}\n",
-+ opt_str, token, args[0].from, args[0].to);
-+
-+ skipped = 0;
-+ switch (token) {
-+ case Opt_br:
-+ err = 0;
-+ while (!err && (opt_str = strsep(&args[0].from, ":"))
-+ && *opt_str) {
-+ err = opt_add(opt, opt_str, sb, bindex++);
-+ //if (LktrCond) err = -1;
-+ if (unlikely(!err && ++opt > opt_tail)) {
-+ err = -E2BIG;
-+ break;
-+ }
-+ opt->type = Opt_tail;
-+ skipped = 1;
-+ }
-+ break;
-+ case Opt_add:
-+ if (unlikely(match_int(&args[0], &n))) {
-+ Err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ bindex = n;
-+ err = opt_add(opt, args[1].from, sb, bindex);
-+ break;
-+ case Opt_append:
-+ case Opt_prepend:
-+ err = opt_add(opt, args[0].from, sb, /*dummy bindex*/1);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+ case Opt_del:
-+ u.del = &opt->del;
-+ u.del->path = args[0].from;
-+ LKTRTrace("del path %s\n", u.del->path);
-+ // LSM may detect it
-+ // do not superio.
-+ err = path_lookup(u.del->path, lkup_dirflags, &nd);
-+ if (unlikely(err)) {
-+ Err("lookup failed %s (%d)\n", u.del->path, err);
-+ break;
-+ }
-+ u.del->h_root = dget(nd.dentry);
-+ path_release(&nd);
-+ opt->type = token;
-+ break;
-+#if 0
-+ case Opt_idel:
-+ u.del = &opt->del;
-+ u.del->path = "(indexed)";
-+ if (unlikely(match_int(&args[0], &n))) {
-+ Err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ bindex = n;
-+ aufs_read_lock(root, !AUFS_I_RLOCK);
-+ if (bindex < 0 || sbend(sb) < bindex) {
-+ Err("out of bounds, %d\n", bindex);
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ break;
-+ }
-+ err = 0;
-+ u.del->h_root = dget(au_h_dptr_i(root, bindex));
-+ opt->type = token;
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ break;
-+#endif
-+
-+ case Opt_mod:
-+ u.mod = &opt->mod;
-+ u.mod->path = args[0].from;
-+ p = strchr(u.mod->path, '=');
-+ if (unlikely(!p)) {
-+ Err("no permssion %s\n", opt_str);
-+ break;
-+ }
-+ *p++ = 0;
-+ u.mod->perm = br_perm_val(p);
-+ LKTRTrace("mod path %s, perm 0x%x, %s\n",
-+ u.mod->path, u.mod->perm, p);
-+ // LSM may detect it
-+ // do not superio.
-+ err = path_lookup(u.mod->path, lkup_dirflags, &nd);
-+ if (unlikely(err)) {
-+ Err("lookup failed %s (%d)\n", u.mod->path, err);
-+ break;
-+ }
-+ u.mod->h_root = dget(nd.dentry);
-+ path_release(&nd);
-+ opt->type = token;
-+ break;
-+#if 0
-+ case Opt_imod:
-+ u.mod = &opt->mod;
-+ u.mod->path = "(indexed)";
-+ if (unlikely(match_int(&args[0], &n))) {
-+ Err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ bindex = n;
-+ aufs_read_lock(root, !AUFS_I_RLOCK);
-+ if (bindex < 0 || sbend(sb) < bindex) {
-+ Err("out of bounds, %d\n", bindex);
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ break;
-+ }
-+ u.mod->perm = br_perm_val(args[1].from);
-+ LKTRTrace("mod path %s, perm 0x%x, %s\n",
-+ u.mod->path, u.mod->perm, args[1].from);
-+ err = 0;
-+ u.mod->h_root = dget(au_h_dptr_i(root, bindex));
-+ opt->type = token;
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ break;
-+#endif
-+ case Opt_xino:
-+ u.xino = &opt->xino;
-+ file = xino_create(sb, args[0].from, /*silent*/0,
-+ /*parent*/NULL);
-+ err = PTR_ERR(file);
-+ if (IS_ERR(file))
-+ break;
-+ err = -EINVAL;
-+ if (unlikely(file->f_dentry->d_sb == sb)) {
-+ fput(file);
-+ Err("%s must be outside\n", args[0].from);
-+ break;
-+ }
-+ err = 0;
-+ u.xino->file = file;
-+ u.xino->path = args[0].from;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_dirwh:
-+ if (unlikely(match_int(&args[0], &opt->dirwh)))
-+ break;
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_rdcache:
-+ if (unlikely(match_int(&args[0], &opt->rdcache)))
-+ break;
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_noxino:
-+ case Opt_plink:
-+ case Opt_noplink:
-+ case Opt_list_plink:
-+ case Opt_clean_plink:
-+ case Opt_diropq_a:
-+ case Opt_diropq_w:
-+ case Opt_warn_perm:
-+ case Opt_nowarn_perm:
-+ case Opt_dlgt:
-+ case Opt_nodlgt:
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_udba:
-+ opt->udba = udba_val(args[0].from);
-+ if (opt->udba >= 0) {
-+ err = 0;
-+ opt->type = token;
-+ }
-+ break;
-+
-+#if 0
-+ case Opt_coo:
-+ opt->coo = coo_val(args[0].from);
-+ if (opt->coo >= 0) {
-+ err = 0;
-+ opt->type = token;
-+ }
-+ break;
-+#endif
-+
-+ case Opt_ignore:
-+#ifndef CONFIG_AUFS_COMPAT
-+ Warn("ignored %s\n", opt_str);
-+#endif
-+ skipped = 1;
-+ err = 0;
-+ break;
-+ case Opt_err:
-+ Err("unknown option %s\n", opt_str);
-+ break;
-+ }
-+
-+ if (!err && !skipped) {
-+ if (unlikely(++opt > opt_tail)) {
-+ err = -E2BIG;
-+ opt--;
-+ opt->type = Opt_tail;
-+ break;
-+ }
-+ opt->type = Opt_tail;
-+ }
-+ }
-+
-+ dump_opts(opts);
-+ if (unlikely(err))
-+ au_free_opts(opts);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * returns,
-+ * plus: processed without an error
-+ * zero: unprocessed
-+ */
-+static int au_do_opt_simple(struct super_block *sb, struct opt *opt,
-+ int remount, unsigned int *given)
-+{
-+ int err;
-+ struct aufs_sbinfo *sbinfo = stosi(sb);
-+
-+ TraceEnter();
-+
-+ err = 1; /* handled */
-+ switch (opt->type) {
-+ case Opt_udba:
-+ udba_set(sb, opt->udba);
-+ *given |= opt->udba;
-+ break;
-+
-+ case Opt_plink:
-+ au_flag_set(sb, AuFlag_PLINK);
-+ *given |= AuFlag_PLINK;
-+ break;
-+ case Opt_noplink:
-+ if (au_flag_test(sb, AuFlag_PLINK))
-+ au_put_plink(sb);
-+ au_flag_clr(sb, AuFlag_PLINK);
-+ *given |= AuFlag_PLINK;
-+ break;
-+ case Opt_list_plink:
-+ if (au_flag_test(sb, AuFlag_PLINK))
-+ au_list_plink(sb);
-+ break;
-+ case Opt_clean_plink:
-+ if (au_flag_test(sb, AuFlag_PLINK))
-+ au_put_plink(sb);
-+ break;
-+
-+ case Opt_diropq_a:
-+ au_flag_set(sb, AuFlag_ALWAYS_DIROPQ);
-+ *given |= AuFlag_ALWAYS_DIROPQ;
-+ break;
-+ case Opt_diropq_w:
-+ au_flag_clr(sb, AuFlag_ALWAYS_DIROPQ);
-+ *given |= AuFlag_ALWAYS_DIROPQ;
-+ break;
-+
-+ case Opt_dlgt:
-+ au_flag_set(sb, AuFlag_DLGT);
-+ *given |= AuFlag_DLGT;
-+ break;
-+ case Opt_nodlgt:
-+ au_flag_clr(sb, AuFlag_DLGT);
-+ *given |= AuFlag_DLGT;
-+ break;
-+
-+ case Opt_warn_perm:
-+ au_flag_set(sb, AuFlag_WARN_PERM);
-+ *given |= AuFlag_WARN_PERM;
-+ break;
-+ case Opt_nowarn_perm:
-+ au_flag_clr(sb, AuFlag_WARN_PERM);
-+ *given |= AuFlag_WARN_PERM;
-+ break;
-+
-+ case Opt_coo:
-+ coo_set(sb, opt->coo);
-+ *given |= opt->coo;
-+ break;
-+
-+ case Opt_dirwh:
-+ sbinfo->si_dirwh = opt->dirwh;
-+ break;
-+
-+ case Opt_rdcache:
-+ sbinfo->si_rdcache = opt->rdcache * HZ;
-+ break;
-+
-+ default:
-+ err = 0;
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * returns tri-state.
-+ * plus: processed without an error
-+ * zero: unprocessed
-+ * minus: error
-+ */
-+static int au_do_opt_br(struct super_block *sb, struct opt *opt, int remount,
-+ int *do_refresh)
-+{
-+ int err;
-+
-+ TraceEnter();
-+
-+ err = 0;
-+ switch (opt->type) {
-+ case Opt_append:
-+ opt->add.bindex = sbend(sb) + 1;
-+ goto add;
-+ case Opt_prepend:
-+ opt->add.bindex = 0;
-+ add:
-+ case Opt_add:
-+ err = br_add(sb, &opt->add, remount);
-+ if (!err)
-+ *do_refresh = err = 1;
-+ break;
-+
-+ case Opt_del:
-+ case Opt_idel:
-+ err = br_del(sb, &opt->del, remount);
-+ if (!err)
-+ *do_refresh = err = 1;
-+ break;
-+
-+ case Opt_mod:
-+ case Opt_imod:
-+ err = br_mod(sb, &opt->mod, remount, do_refresh);
-+ if (!err)
-+ err = 1;
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int au_do_opt_xino(struct super_block *sb, struct opt *opt, int remount,
-+ struct opt_xino **opt_xino)
-+{
-+ int err;
-+
-+ TraceEnter();
-+
-+ err = 0;
-+ switch (opt->type) {
-+ case Opt_xino:
-+ err = xino_set(sb, &opt->xino, remount);
-+ if (!err)
-+ *opt_xino = &opt->xino;
-+ break;
-+ case Opt_noxino:
-+ err = xino_clr(sb);
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int verify_opts(struct super_block *sb, int remount)
-+{
-+ int err;
-+ aufs_bindex_t bindex, bend;
-+ struct aufs_branch *br;
-+ struct dentry *root;
-+ struct inode *dir;
-+ unsigned int do_plink;
-+
-+ TraceEnter();
-+
-+ if (unlikely(!(sb->s_flags & MS_RDONLY)
-+ && !br_writable(sbr_perm(sb, 0))))
-+ Warn("first branch should be rw\n");
-+
-+ err = 0;
-+ root = sb->s_root;
-+ dir = sb->s_root->d_inode;
-+ do_plink = au_flag_test(sb, AuFlag_PLINK);
-+ bend = sbend(sb);
-+ for (bindex = 0; !err && bindex <= bend; bindex++) {
-+ struct inode *h_dir;
-+ int skip;
-+
-+ skip = 0;
-+ h_dir = au_h_iptr_i(dir, bindex);
-+ br = stobr(sb, bindex);
-+ br_wh_read_lock(br);
-+ switch (br->br_perm) {
-+ case AuBr_RR:
-+ case AuBr_RO:
-+ case AuBr_RRWH:
-+ case AuBr_ROWH:
-+ skip = (!br->br_wh && !br->br_plink);
-+ break;
-+
-+ case AuBr_RWNoLinkWH:
-+ skip = !br->br_wh;
-+ if (skip) {
-+ if (do_plink)
-+ skip = !!br->br_plink;
-+ else
-+ skip = !br->br_plink;
-+ }
-+ break;
-+
-+ case AuBr_RW:
-+ skip = !!br->br_wh;
-+ if (skip) {
-+ if (do_plink)
-+ skip = !!br->br_plink;
-+ else
-+ skip = !br->br_plink;
-+ }
-+ break;
-+
-+ default:
-+ BUG();
-+ }
-+ br_wh_read_unlock(br);
-+
-+ if (skip)
-+ continue;
-+
-+ hdir_lock(h_dir, dir, bindex);
-+ br_wh_write_lock(br);
-+ err = init_wh(au_h_dptr_i(root, bindex), br,
-+ au_nfsmnt(sb, bindex), sb);
-+ br_wh_write_unlock(br);
-+ hdir_unlock(h_dir, dir, bindex);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_do_opts_mount(struct super_block *sb, struct opts *opts)
-+{
-+ int err, do_refresh;
-+ struct inode *dir;
-+ struct opt *opt;
-+ unsigned int flags, given;
-+ struct opt_xino *opt_xino;
-+ aufs_bindex_t bend, bindex;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+ DiMustWriteLock(sb->s_root);
-+ dir = sb->s_root->d_inode;
-+ IiMustWriteLock(dir);
-+
-+ err = 0;
-+ given = 0;
-+ opt_xino = NULL;
-+ opt = opts->opt;
-+ while (err >= 0 && opt->type != Opt_tail)
-+ err = au_do_opt_simple(sb, opt++, /*remount*/0, &given);
-+ if (err > 0)
-+ err = 0;
-+ else if (unlikely(err < 0))
-+ goto out;
-+
-+ /* disable them temporary */
-+ flags = au_flag_test(sb, AuFlag_XINO | AuMask_UDBA | AuFlag_DLGT);
-+ au_flag_clr(sb, AuFlag_XINO | AuFlag_DLGT);
-+ udba_set(sb, AuFlag_UDBA_REVAL);
-+
-+ do_refresh = 0;
-+ opt = opts->opt;
-+ while (err >= 0 && opt->type != Opt_tail)
-+ err = au_do_opt_br(sb, opt++, /*remount*/0, &do_refresh);
-+ if (err > 0)
-+ err = 0;
-+ else if (unlikely(err < 0))
-+ goto out;
-+
-+ bend = sbend(sb);
-+ if (unlikely(bend < 0)) {
-+ err = -EINVAL;
-+ Err("no branches\n");
-+ goto out;
-+ }
-+
-+ if (flags & AuFlag_XINO)
-+ au_flag_set(sb, AuFlag_XINO);
-+ opt = opts->opt;
-+ while (!err && opt->type != Opt_tail)
-+ err = au_do_opt_xino(sb, opt++, /*remount*/0, &opt_xino);
-+ if (unlikely(err))
-+ goto out;
-+
-+ //todo: test this error case.
-+ err = verify_opts(sb, /*remount*/0);
-+ DEBUG_ON(err);
-+ if (unlikely(err))
-+ goto out;
-+
-+ /* enable xino */
-+ if (au_flag_test(sb, AuFlag_XINO) && !opt_xino) {
-+ struct file *xino_file = xino_def(sb);
-+ err = PTR_ERR(xino_file);
-+ if (IS_ERR(xino_file))
-+ goto out;
-+
-+ err = 0;
-+ for (bindex = 0; !err && bindex <= bend; bindex++)
-+ err = xino_init(sb, bindex, xino_file,
-+ /*do_test*/bindex);
-+ fput(xino_file);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+
-+ /* restore hinotify */
-+ udba_set(sb, flags & AuMask_UDBA);
-+ if (flags & AuFlag_UDBA_INOTIFY)
-+ au_reset_hinotify(dir, au_hi_flags(dir, 1) & ~AUFS_HI_XINO);
-+
-+ /* restore dlgt */
-+ if (flags & AuFlag_DLGT)
-+ au_flag_set(sb, AuFlag_DLGT);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_do_opts_remount(struct super_block *sb, struct opts *opts,
-+ int *do_refresh, unsigned int *given)
-+{
-+ int err, rerr;
-+ struct inode *dir;
-+ struct opt_xino *opt_xino;
-+ struct opt *opt;
-+ unsigned int dlgt;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+ DiMustWriteLock(sb->s_root);
-+ dir = sb->s_root->d_inode;
-+ IiMustWriteLock(dir);
-+ //DEBUG_ON(au_flag_test(sb, AuFlag_UDBA_INOTIFY));
-+
-+ err = 0;
-+ *do_refresh = 0;
-+ *given = 0;
-+ dlgt = au_flag_test(sb, AuFlag_DLGT);
-+ opt_xino = NULL;
-+ opt = opts->opt;
-+ while (err >= 0 && opt->type != Opt_tail) {
-+ err = au_do_opt_simple(sb, opt, /*remount*/1, given);
-+
-+ /* disable it temporary */
-+ dlgt = au_flag_test(sb, AuFlag_DLGT);
-+ au_flag_clr(sb, AuFlag_DLGT);
-+
-+ if (!err)
-+ err = au_do_opt_br(sb, opt, /*remount*/1, do_refresh);
-+ if (!err)
-+ err = au_do_opt_xino(sb, opt, /*remount*/1, &opt_xino);
-+
-+ /* restore it */
-+ au_flag_set(sb, dlgt);
-+ opt++;
-+ }
-+ if (err > 0)
-+ err = 0;
-+ TraceErr(err);
-+
-+ /* go on if err */
-+
-+ //todo: test this error case.
-+ au_flag_clr(sb, AuFlag_DLGT);
-+ rerr = verify_opts(sb, /*remount*/1);
-+ au_flag_set(sb, dlgt);
-+
-+ /* they are handled by the caller */
-+ if (!*do_refresh)
-+ *do_refresh = !!((*given & AuMask_UDBA)
-+ || au_flag_test(sb, AuFlag_XINO));
-+
-+ TraceErr(err);
-+ return err;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/opts.h linux-2.6.22.1/fs/aufs/opts.h
---- linux-2.6.22.1.oorig/fs/aufs/opts.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/opts.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,96 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: opts.h,v 1.13 2007/05/14 06:27:18 sfjro Exp $ */
-+
-+#ifndef __AUFS_OPTS_H__
-+#define __AUFS_OPTS_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/namei.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-+typedef const char* au_parser_pattern_t;
-+#else
-+typedef char* au_parser_pattern_t;
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct opt_add {
-+ aufs_bindex_t bindex;
-+ char *path;
-+ int perm;
-+ struct nameidata nd;
-+};
-+
-+struct opt_del {
-+ char *path;
-+ struct dentry *h_root;
-+};
-+
-+struct opt_mod {
-+ char *path;
-+ int perm;
-+ struct dentry *h_root;
-+};
-+
-+struct opt_xino {
-+ char *path;
-+ struct file *file;
-+};
-+
-+struct opt {
-+ int type;
-+ union {
-+ struct opt_xino xino;
-+ struct opt_add add;
-+ struct opt_del del;
-+ struct opt_mod mod;
-+ int dirwh;
-+ int rdcache;
-+ int deblk;
-+ int nhash;
-+ int udba;
-+ int coo;
-+ };
-+};
-+
-+struct opts {
-+ struct opt *opt;
-+ int max_opt;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int br_perm_str(char *p, unsigned int len, int brperm);
-+au_parser_pattern_t udba_str(int udba);
-+void udba_set(struct super_block *sb, unsigned int flg);
-+//au_parser_pattern_t coo_str(int coo);
-+void au_free_opts(struct opts *opts);
-+int au_parse_opts(struct super_block *sb, char *str, struct opts *opts);
-+int au_do_opts_mount(struct super_block *sb, struct opts *opts);
-+int au_do_opts_remount(struct super_block *sb, struct opts *opts,
-+ int *do_refresh, unsigned int *given);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_OPTS_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/plink.c linux-2.6.22.1/fs/aufs/plink.c
---- linux-2.6.22.1.oorig/fs/aufs/plink.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/plink.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,331 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: plink.c,v 1.4 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+struct pseudo_link {
-+ struct list_head list;
-+ struct inode *inode;
-+};
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+void au_list_plink(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink;
-+
-+ TraceEnter();
-+ SiMustAnyLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry(plink, plink_list, list)
-+ Dbg("%lu\n", plink->inode->i_ino);
-+ spin_unlock(&sbinfo->si_plink_lock);
-+}
-+#endif
-+
-+int au_is_plinked(struct super_block *sb, struct inode *inode)
-+{
-+ int found;
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ SiMustAnyLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ found = 0;
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry(plink, plink_list, list)
-+ if (plink->inode == inode) {
-+ found = 1;
-+ break;
-+ }
-+ spin_unlock(&sbinfo->si_plink_lock);
-+ return found;
-+}
-+
-+// 20 is max digits length of ulong 64
-+#define PLINK_NAME_LEN ((20 + 1) * 2)
-+
-+static int plink_name(char *name, int len, struct inode *inode,
-+ aufs_bindex_t bindex)
-+{
-+ int rlen;
-+ struct inode *h_inode;
-+
-+ LKTRTrace("i%lu, b%d\n", inode->i_ino, bindex);
-+ DEBUG_ON(len != PLINK_NAME_LEN);
-+ h_inode = au_h_iptr_i(inode, bindex);
-+ DEBUG_ON(!h_inode);
-+ rlen = snprintf(name, len, "%lu.%lu", inode->i_ino, h_inode->i_ino);
-+ DEBUG_ON(rlen >= len);
-+ return rlen;
-+}
-+
-+struct dentry *lkup_plink(struct super_block *sb, aufs_bindex_t bindex,
-+ struct inode *inode)
-+{
-+ struct dentry *h_dentry, *h_parent;
-+ struct aufs_branch *br;
-+ struct inode *h_dir;
-+ char tgtname[PLINK_NAME_LEN];
-+ int len;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("b%d, i%lu\n", bindex, inode->i_ino);
-+ br = stobr(sb, bindex);
-+ h_parent = br->br_plink;
-+ DEBUG_ON(!h_parent);
-+ h_dir = h_parent->d_inode;
-+ DEBUG_ON(!h_dir);
-+
-+ len = plink_name(tgtname, sizeof(tgtname), inode, bindex);
-+
-+ // always superio.
-+ lkup.nfsmnt = au_do_nfsmnt(br->br_mnt);
-+ lkup.dlgt = need_dlgt(sb);
-+ hi_lock_whplink(h_dir);
-+ h_dentry = sio_lkup_one(tgtname, h_parent, len, &lkup);
-+ i_unlock(h_dir);
-+ return h_dentry;
-+}
-+
-+static int do_whplink(char *tgt, int len, struct dentry *h_parent,
-+ struct dentry *h_dentry, struct vfsmount *nfsmnt,
-+ struct super_block *sb)
-+{
-+ int err;
-+ struct dentry *h_tgt;
-+ struct inode *h_dir;
-+ struct lkup_args lkup = {
-+ .nfsmnt = nfsmnt,
-+ .dlgt = need_dlgt(sb)
-+ };
-+
-+ h_tgt = lkup_one(tgt, h_parent, len, &lkup);
-+ err = PTR_ERR(h_tgt);
-+ if (IS_ERR(h_tgt))
-+ goto out;
-+
-+ err = 0;
-+ h_dir = h_parent->d_inode;
-+ if (unlikely(h_tgt->d_inode && h_tgt->d_inode != h_dentry->d_inode))
-+ err = vfsub_unlink(h_dir, h_tgt, lkup.dlgt);
-+ if (!err && !h_tgt->d_inode) {
-+ err = vfsub_link(h_dentry, h_dir, h_tgt, lkup.dlgt);
-+ //inode->i_nlink++;
-+ }
-+ dput(h_tgt);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct do_whplink_args {
-+ int *errp;
-+ char *tgt;
-+ int len;
-+ struct dentry *h_parent;
-+ struct dentry *h_dentry;
-+ struct vfsmount *nfsmnt;
-+ struct super_block *sb;
-+};
-+
-+static void call_do_whplink(void *args)
-+{
-+ struct do_whplink_args *a = args;
-+ *a->errp = do_whplink(a->tgt, a->len, a->h_parent, a->h_dentry,
-+ a->nfsmnt, a->sb);
-+}
-+
-+static int whplink(struct dentry *h_dentry, struct inode *inode,
-+ aufs_bindex_t bindex, struct super_block *sb)
-+{
-+ int err, len;
-+ struct aufs_branch *br;
-+ struct dentry *h_parent;
-+ struct inode *h_dir;
-+ char tgtname[PLINK_NAME_LEN];
-+
-+ LKTRTrace("%.*s\n", DLNPair(h_dentry));
-+ br = stobr(inode->i_sb, bindex);
-+ h_parent = br->br_plink;
-+ DEBUG_ON(!h_parent);
-+ h_dir = h_parent->d_inode;
-+ DEBUG_ON(!h_dir);
-+
-+ len = plink_name(tgtname, sizeof(tgtname), inode, bindex);
-+
-+ // always superio.
-+ hi_lock_whplink(h_dir);
-+ if (!is_au_wkq(current)) {
-+ struct do_whplink_args args = {
-+ .errp = &err,
-+ .tgt = tgtname,
-+ .len = len,
-+ .h_parent = h_parent,
-+ .h_dentry = h_dentry,
-+ .nfsmnt = au_do_nfsmnt(br->br_mnt),
-+ .sb = sb
-+ };
-+ au_wkq_wait(call_do_whplink, &args, /*dlgt*/0);
-+ } else
-+ err = do_whplink(tgtname, len, h_parent, h_dentry,
-+ au_do_nfsmnt(br->br_mnt), sb);
-+ i_unlock(h_dir);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+void append_plink(struct super_block *sb, struct inode *inode,
-+ struct dentry *h_dentry, aufs_bindex_t bindex)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink;
-+ int found, err, cnt;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ SiMustAnyLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ cnt = 0;
-+ found = 0;
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry(plink, plink_list, list) {
-+ cnt++;
-+ if (plink->inode == inode) {
-+ found = 1;
-+ break;
-+ }
-+ }
-+
-+ err = 0;
-+ if (!found) {
-+ struct pseudo_link *plink;
-+
-+ plink = kmalloc(sizeof(*plink), GFP_ATOMIC);
-+ if (plink) {
-+ plink->inode = igrab(inode);
-+ list_add(&plink->list, plink_list);
-+ cnt++;
-+ } else
-+ err = -ENOMEM;
-+ }
-+ spin_unlock(&sbinfo->si_plink_lock);
-+
-+ if (!err)
-+ err = whplink(h_dentry, inode, bindex, sb);
-+
-+ if (unlikely(cnt > 100))
-+ Warn1("unexpectedly many pseudo links, %d\n", cnt);
-+ if (unlikely(err))
-+ Warn("err %d, damaged pseudo link. ignored.\n", err);
-+}
-+
-+static void do_put_plink(struct pseudo_link *plink, int do_del)
-+{
-+ TraceEnter();
-+
-+ iput(plink->inode);
-+ if (do_del)
-+ list_del(&plink->list);
-+ kfree(plink);
-+}
-+
-+void au_put_plink(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink, *tmp;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ //spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry_safe(plink, tmp, plink_list, list)
-+ do_put_plink(plink, 0);
-+ INIT_LIST_HEAD(plink_list);
-+ //spin_unlock(&sbinfo->si_plink_lock);
-+}
-+
-+void half_refresh_plink(struct super_block *sb, aufs_bindex_t br_id)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ struct list_head *plink_list;
-+ struct pseudo_link *plink, *tmp;
-+ struct inode *inode;
-+ aufs_bindex_t bstart, bend, bindex;
-+ int do_put;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_PLINK));
-+
-+ sbinfo = stosi(sb);
-+ plink_list = &sbinfo->si_plink;
-+ //spin_lock(&sbinfo->si_plink_lock);
-+ list_for_each_entry_safe(plink, tmp, plink_list, list) {
-+ do_put = 0;
-+ inode = igrab(plink->inode);
-+ ii_write_lock_child(inode);
-+ bstart = ibstart(inode);
-+ bend = ibend(inode);
-+ if (bstart >= 0) {
-+ for (bindex = bstart; bindex <= bend; bindex++) {
-+ if (!au_h_iptr_i(inode, bindex)
-+ || itoid_index(inode, bindex) != br_id)
-+ continue;
-+ set_h_iptr(inode, bindex, NULL, 0);
-+ do_put = 1;
-+ break;
-+ }
-+ } else
-+ do_put_plink(plink, 1);
-+
-+ if (do_put) {
-+ for (bindex = bstart; bindex <= bend; bindex++)
-+ if (au_h_iptr_i(inode, bindex)) {
-+ do_put = 0;
-+ break;
-+ }
-+ if (do_put)
-+ do_put_plink(plink, 1);
-+ }
-+ ii_write_unlock(inode);
-+ iput(inode);
-+ }
-+ //spin_unlock(&sbinfo->si_plink_lock);
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/sbinfo.c linux-2.6.22.1/fs/aufs/sbinfo.c
---- linux-2.6.22.1.oorig/fs/aufs/sbinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/sbinfo.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,173 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: sbinfo.c,v 1.30 2007/05/14 03:39:31 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+struct aufs_sbinfo *stosi(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+ sbinfo = sb->s_fs_info;
-+ //DEBUG_ON(sbinfo->si_bend < 0);
-+ return sbinfo;
-+}
-+
-+aufs_bindex_t sbend(struct super_block *sb)
-+{
-+ SiMustAnyLock(sb);
-+ return stosi(sb)->si_bend;
-+}
-+
-+struct aufs_branch *stobr(struct super_block *sb, aufs_bindex_t bindex)
-+{
-+ SiMustAnyLock(sb);
-+ DEBUG_ON(bindex < 0 || sbend(sb) < bindex
-+ || !stosi(sb)->si_branch[0 + bindex]);
-+ return stosi(sb)->si_branch[0 + bindex];
-+}
-+
-+int au_sigen(struct super_block *sb)
-+{
-+ SiMustAnyLock(sb);
-+ return stosi(sb)->si_generation;
-+}
-+
-+int au_sigen_inc(struct super_block *sb)
-+{
-+ int gen;
-+
-+ SiMustWriteLock(sb);
-+ gen = ++stosi(sb)->si_generation;
-+ au_update_digen(sb->s_root);
-+ au_update_iigen(sb->s_root->d_inode);
-+ sb->s_root->d_inode->i_version++;
-+ return gen;
-+}
-+
-+int find_bindex(struct super_block *sb, struct aufs_branch *br)
-+{
-+ aufs_bindex_t bindex, bend;
-+
-+ bend = sbend(sb);
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (stobr(sb, bindex) == br)
-+ return bindex;
-+ return -1;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* dentry and super_block lock. call at entry point */
-+void aufs_read_lock(struct dentry *dentry, int flags)
-+{
-+ si_read_lock(dentry->d_sb);
-+ if (flags & AUFS_D_WLOCK)
-+ di_write_lock_child(dentry);
-+ else
-+ di_read_lock_child(dentry, flags);
-+}
-+
-+void aufs_read_unlock(struct dentry *dentry, int flags)
-+{
-+ if (flags & AUFS_D_WLOCK)
-+ di_write_unlock(dentry);
-+ else
-+ di_read_unlock(dentry, flags);
-+ si_read_unlock(dentry->d_sb);
-+}
-+
-+void aufs_write_lock(struct dentry *dentry)
-+{
-+ //au_wkq_wait_nwtask();
-+ si_write_lock(dentry->d_sb);
-+ di_write_lock_child(dentry);
-+}
-+
-+void aufs_write_unlock(struct dentry *dentry)
-+{
-+ di_write_unlock(dentry);
-+ si_write_unlock(dentry->d_sb);
-+ //au_wkq_wait_nwtask();
-+}
-+
-+void aufs_read_and_write_lock2(struct dentry *d1, struct dentry *d2, int isdir)
-+{
-+ DEBUG_ON(d1 == d2 || d1->d_sb != d2->d_sb);
-+ si_read_lock(d1->d_sb);
-+ di_write_lock2_child(d1, d2, isdir);
-+}
-+
-+void aufs_read_and_write_unlock2(struct dentry *d1, struct dentry *d2)
-+{
-+ DEBUG_ON(d1 == d2 || d1->d_sb != d2->d_sb);
-+ di_write_unlock2(d1, d2);
-+ si_read_unlock(d1->d_sb);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+aufs_bindex_t new_br_id(struct super_block *sb)
-+{
-+ aufs_bindex_t br_id;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+
-+ while (1) {
-+ br_id = ++stosi(sb)->si_last_br_id;
-+ if (br_id && find_brindex(sb, br_id) < 0)
-+ return br_id;
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_SYSAUFS
-+static int make_xino(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size)
-+{
-+ int err;
-+ struct super_block *sb = args->sb;
-+ aufs_bindex_t bindex, bend;
-+ struct file *xf;
-+ struct inode *xi;
-+
-+ TraceEnter();
-+ DEBUG_ON(args->index != SysaufsSb_XINO);
-+ SiMustReadLock(sb);
-+
-+ *do_size = 0;
-+ err = seq_printf(seq, "%d %lu\n", sizeof(struct xino),
-+ atomic_long_read(&stosi(sb)->si_xino));
-+ bend = sbend(sb);
-+ for (bindex = 0; !err && bindex <= bend; bindex++) {
-+ xf = stobr(sb, bindex)->br_xino;
-+ xi = xf->f_dentry->d_inode;
-+ err = seq_printf(seq, "%d: %d, %Lux%d %Ld\n",
-+ bindex, file_count(xf),
-+ (u64)xi->i_blocks, 1 << xi->i_blkbits,
-+ i_size_read(xi));
-+ }
-+ return err;
-+}
-+
-+sysaufs_op au_si_ops[] = {
-+ [SysaufsSb_XINO] = make_xino
-+};
-+#endif
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/super.c linux-2.6.22.1/fs/aufs/super.c
---- linux-2.6.22.1.oorig/fs/aufs/super.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/super.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,716 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: super.c,v 1.50 2007/05/14 03:39:42 sfjro Exp $ */
-+
-+#include <linux/module.h>
-+#include <linux/seq_file.h>
-+#include <linux/statfs.h>
-+#include "aufs.h"
-+
-+/*
-+ * super_operations
-+ */
-+static struct inode *aufs_alloc_inode(struct super_block *sb)
-+{
-+ struct aufs_icntnr *c;
-+
-+ TraceEnter();
-+
-+ c = cache_alloc_icntnr();
-+ //if (LktrCond) {cache_free_icntnr(c); c = NULL;}
-+ if (c) {
-+ inode_init_once(&c->vfs_inode);
-+ c->vfs_inode.i_version = 1; //sigen(sb);
-+ c->iinfo.ii_hinode = NULL;
-+ return &c->vfs_inode;
-+ }
-+ return NULL;
-+}
-+
-+static void aufs_destroy_inode(struct inode *inode)
-+{
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+ au_iinfo_fin(inode);
-+ cache_free_icntnr(container_of(inode, struct aufs_icntnr, vfs_inode));
-+}
-+
-+//todo: how about merge with alloc_inode()?
-+static void aufs_read_inode(struct inode *inode)
-+{
-+ int err;
-+
-+ LKTRTrace("i%lu\n", inode->i_ino);
-+
-+ err = au_iinfo_init(inode);
-+ //if (LktrCond) err = -1;
-+ if (!err) {
-+ inode->i_version++;
-+ inode->i_op = &aufs_iop;
-+ inode->i_fop = &aufs_file_fop;
-+ inode->i_mapping->a_ops = &aufs_aop;
-+ return; /* success */
-+ }
-+
-+ LKTRTrace("intializing inode info failed(%d)\n", err);
-+ make_bad_inode(inode);
-+}
-+
-+int au_show_brs(struct seq_file *seq, struct super_block *sb)
-+{
-+ int err;
-+ aufs_bindex_t bindex, bend;
-+ char a[16];
-+ struct dentry *root;
-+
-+ TraceEnter();
-+ SiMustAnyLock(sb);
-+ root = sb->s_root;
-+ DiMustAnyLock(root);
-+
-+ err = 0;
-+ bend = sbend(sb);
-+ for (bindex = 0; !err && bindex <= bend; bindex++) {
-+ err = br_perm_str(a, sizeof(a), sbr_perm(sb, bindex));
-+ if (!err)
-+ err = seq_path(seq, sbr_mnt(sb, bindex),
-+ au_h_dptr_i(root, bindex), au_esc_chars);
-+ if (err > 0)
-+ err = seq_printf(seq, "=%s", a);
-+ if (!err && bindex != bend)
-+ err = seq_putc(seq, ':');
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int aufs_show_options(struct seq_file *m, struct vfsmount *mnt)
-+{
-+ int err, n;
-+ struct super_block *sb;
-+ struct aufs_sbinfo *sbinfo;
-+ struct dentry *root;
-+ struct file *xino;
-+
-+ TraceEnter();
-+
-+ sb = mnt->mnt_sb;
-+ root = sb->s_root;
-+ aufs_read_lock(root, !AUFS_I_RLOCK);
-+ if (au_flag_test(sb, AuFlag_XINO)) {
-+ err = seq_puts(m, ",xino=");
-+ if (unlikely(err))
-+ goto out;
-+ xino = stobr(sb, 0)->br_xino;
-+ err = seq_path(m, xino->f_vfsmnt, xino->f_dentry, au_esc_chars);
-+ if (unlikely(err <= 0))
-+ goto out;
-+ err = 0;
-+
-+#define Deleted "\\040(deleted)"
-+ m->count -= sizeof(Deleted) - 1;
-+ DEBUG_ON(memcmp(m->buf + m->count, Deleted,
-+ sizeof(Deleted) - 1));
-+#undef Deleted
-+ } else
-+ err = seq_puts(m, ",noxino");
-+
-+ n = au_flag_test(sb, AuFlag_PLINK);
-+ if (unlikely(!err && (AuDefFlags & AuFlag_PLINK) != n))
-+ err = seq_printf(m, ",%splink", n ? "" : "no");
-+ n = au_flag_test_udba(sb);
-+ if (unlikely(!err && (AuDefFlags & AuMask_UDBA) != n))
-+ err = seq_printf(m, ",udba=%s", udba_str(n));
-+ n = au_flag_test(sb, AuFlag_ALWAYS_DIROPQ);
-+ if (unlikely(!err && (AuDefFlags & AuFlag_ALWAYS_DIROPQ) != n))
-+ err = seq_printf(m, ",diropq=%c", n ? 'a' : 'w');
-+ n = au_flag_test(sb, AuFlag_DLGT);
-+ if (unlikely(!err && (AuDefFlags & AuFlag_DLGT) != n))
-+ err = seq_printf(m, ",%sdlgt", n ? "" : "no");
-+ n = au_flag_test(sb, AuFlag_WARN_PERM);
-+ if (unlikely(!err && (AuDefFlags & AuFlag_WARN_PERM) != n))
-+ err = seq_printf(m, ",%swarn_perm", n ? "" : "no");
-+
-+ sbinfo = stosi(sb);
-+ n = sbinfo->si_dirwh;
-+ if (unlikely(!err && n != AUFS_DIRWH_DEF))
-+ err = seq_printf(m, ",dirwh=%d", n);
-+ n = sbinfo->si_rdcache / HZ;
-+ if (unlikely(!err && n != AUFS_RDCACHE_DEF))
-+ err = seq_printf(m, ",rdcache=%d", n);
-+#if 0
-+ n = au_flag_test_coo(sb);
-+ if (unlikely(!err && (AuDefFlags & AuMask_COO) != n))
-+ err = seq_printf(m, ",coo=%s", coo_str(n));
-+#endif
-+
-+ if (!err && !sysaufs_brs) {
-+#ifdef CONFIG_AUFS_COMPAT
-+ err = seq_puts(m, ",dirs=");
-+#else
-+ err = seq_puts(m, ",br:");
-+#endif
-+ if (!err)
-+ err = au_show_brs(m, sb);
-+ }
-+
-+ out:
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ TraceErr(err);
-+ if (err)
-+ err = -E2BIG;
-+ TraceErr(err);
-+ return err;
-+}
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+#define StatfsLock(d) aufs_read_lock((d)->d_sb->s_root, 0)
-+#define StatfsUnlock(d) aufs_read_unlock((d)->d_sb->s_root, 0)
-+#define StatfsArg(d) au_h_dptr((d)->d_sb->s_root)
-+#define StatfsHInode(d) (StatfsArg(d)->d_inode)
-+#define StatfsSb(d) ((d)->d_sb)
-+static int aufs_statfs(struct dentry *arg, struct kstatfs *buf)
-+#else
-+#define StatfsLock(s) si_read_lock(s)
-+#define StatfsUnlock(s) si_read_unlock(s)
-+#define StatfsArg(s) sbr_sb(s, 0)
-+#define StatfsHInode(s) (StatfsArg(s)->s_root->d_inode)
-+#define StatfsSb(s) (s)
-+static int aufs_statfs(struct super_block *arg, struct kstatfs *buf)
-+#endif
-+{
-+ int err;
-+
-+ TraceEnter();
-+
-+ StatfsLock(arg);
-+ err = vfsub_statfs(StatfsArg(arg), buf, need_dlgt(StatfsSb(arg)));
-+ //if (LktrCond) err = -1;
-+ StatfsUnlock(arg);
-+ if (!err) {
-+ //buf->f_type = AUFS_SUPER_MAGIC;
-+ buf->f_type = 0;
-+ buf->f_namelen -= AUFS_WH_PFX_LEN;
-+ memset(&buf->f_fsid, 0, sizeof(buf->f_fsid));
-+ }
-+ //buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18) || defined(UbuntuEdgy17Umount18)
-+#define UmountBeginSb(mnt) (mnt)->mnt_sb
-+static void aufs_umount_begin(struct vfsmount *arg, int flags)
-+#else
-+#define UmountBeginSb(sb) sb
-+static void aufs_umount_begin(struct super_block *arg)
-+#endif
-+{
-+ struct super_block *sb = UmountBeginSb(arg);
-+
-+ if (unlikely(!stosi(sb)))
-+ return;
-+
-+ //au_wkq_wait_nwtask();
-+ si_write_lock(sb);
-+ if (au_flag_test(sb, AuFlag_PLINK)) {
-+ au_put_plink(sb);
-+ //kobj_umount(stosi(sb));
-+ }
-+#if 0
-+ if (unlikely(au_flag_test(sb, AuFlag_UDBA_INOTIFY)))
-+ shrink_dcache_sb(sb);
-+#endif
-+ si_write_unlock(sb);
-+}
-+
-+static void free_sbinfo(struct aufs_sbinfo *sbinfo)
-+{
-+ TraceEnter();
-+ DEBUG_ON(!sbinfo
-+ || !list_empty(&sbinfo->si_plink));
-+
-+ free_branches(sbinfo);
-+ kfree(sbinfo->si_branch);
-+ kfree(sbinfo);
-+}
-+
-+/* final actions when unmounting a file system */
-+static void aufs_put_super(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+
-+ sbinfo = stosi(sb);
-+ if (unlikely(!sbinfo))
-+ return;
-+
-+ sysaufs_del(sbinfo);
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && !defined(UbuntuEdgy17Umount18)
-+ // umount_begin() may not be called.
-+ aufs_umount_begin(sb);
-+#endif
-+ free_sbinfo(sbinfo);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * refresh directories at remount time.
-+ */
-+static int do_refresh_dir(struct dentry *dentry, unsigned int flags)
-+{
-+ int err;
-+ struct dentry *parent;
-+ struct inode *inode;
-+
-+ LKTRTrace("%.*s\n", DLNPair(dentry));
-+ inode = dentry->d_inode;
-+ DEBUG_ON(!inode || !S_ISDIR(inode->i_mode));
-+
-+ di_write_lock_child(dentry);
-+ parent = dget_parent(dentry);
-+ di_read_lock_parent(parent, AUFS_I_RLOCK);
-+ err = au_refresh_hdentry(dentry, S_IFDIR);
-+ if (err >= 0) {
-+ err = au_refresh_hinode(inode, dentry);
-+ if (!err)
-+ au_reset_hinotify(inode, flags);
-+ }
-+ if (unlikely(err))
-+ Err("unrecoverable error %d\n", err);
-+ di_read_unlock(parent, AUFS_I_RLOCK);
-+ dput(parent);
-+ di_write_unlock(dentry);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int test_dir(struct dentry *dentry, void *arg)
-+{
-+ return S_ISDIR(dentry->d_inode->i_mode);
-+}
-+
-+static int refresh_dir(struct dentry *root, int sgen)
-+{
-+ int err, i, j, ndentry;
-+ const unsigned int flags = au_hi_flags(root->d_inode, /*isdir*/1);
-+ struct au_dcsub_pages dpages;
-+ struct au_dpage *dpage;
-+ struct dentry **dentries;
-+
-+ LKTRTrace("sgen %d\n", sgen);
-+ SiMustWriteLock(root->d_sb);
-+ DEBUG_ON(au_digen(root) != sgen);
-+ DiMustWriteLock(root);
-+
-+ err = au_dpages_init(&dpages, GFP_KERNEL);
-+ if (unlikely(err))
-+ goto out;
-+ err = au_dcsub_pages(&dpages, root, test_dir, NULL);
-+ if (unlikely(err))
-+ goto out_dpages;
-+
-+ DiMustNoWaiters(root);
-+ IiMustNoWaiters(root->d_inode);
-+ di_write_unlock(root);
-+ for (i = 0; !err && i < dpages.ndpage; i++) {
-+ dpage = dpages.dpages + i;
-+ dentries = dpage->dentries;
-+ ndentry = dpage->ndentry;
-+ for (j = 0; !err && j < ndentry; j++) {
-+ struct dentry *d;
-+ d = dentries[j];
-+ DEBUG_ON(!S_ISDIR(d->d_inode->i_mode)
-+ || IS_ROOT(d)
-+ || au_digen(d->d_parent) != sgen);
-+ if (au_digen(d) != sgen)
-+ err = do_refresh_dir(d, flags);
-+ }
-+ }
-+ di_write_lock_child(root); /* aufs_write_lock() calls ..._child() */
-+
-+ out_dpages:
-+ au_dpages_free(&dpages);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* stop extra interpretation of errno in mount(8), and strange error messages */
-+static int cvt_err(int err)
-+{
-+ TraceErr(err);
-+
-+ switch (err) {
-+ case -ENOENT:
-+ case -ENOTDIR:
-+ case -EEXIST:
-+ case -EIO:
-+ err = -EINVAL;
-+ }
-+ return err;
-+}
-+
-+/* protected by s_umount */
-+static int aufs_remount_fs(struct super_block *sb, int *flags, char *data)
-+{
-+ int err, do_refresh;
-+ struct dentry *root;
-+ struct inode *inode;
-+ struct opts opts;
-+ unsigned int given, dlgt;
-+
-+ //au_debug_on();
-+ LKTRTrace("flags 0x%x, data %s, len %d\n",
-+ *flags, data ? data : "NULL", data ? strlen(data) : 0);
-+
-+ err = 0;
-+ if (unlikely(!data || !*data))
-+ goto out; /* success */
-+
-+ err = -ENOMEM;
-+ memset(&opts, 0, sizeof(opts));
-+ opts.opt = (void*)__get_free_page(GFP_KERNEL);
-+ //if (LktrCond) {free_page((unsigned long)opts.opt); opts.opt = NULL;}
-+ if (unlikely(!opts.opt))
-+ goto out;
-+ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt);
-+
-+ /* parse it before aufs lock */
-+ err = au_parse_opts(sb, data, &opts);
-+ //if (LktrCond) {au_free_opts(&opts); err = -1;}
-+ if (unlikely(err))
-+ goto out_opts;
-+
-+ root = sb->s_root;
-+ inode = root->d_inode;
-+ i_lock(inode);
-+ aufs_write_lock(root);
-+
-+ //DbgSleep(3);
-+
-+ /* au_do_opts() may return an error */
-+ do_refresh = 0;
-+ given = 0;
-+ err = au_do_opts_remount(sb, &opts, &do_refresh, &given);
-+ //if (LktrCond) err = -1;
-+ au_free_opts(&opts);
-+
-+ if (do_refresh) {
-+ int rerr;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ dlgt = au_flag_test(sb, AuFlag_DLGT);
-+ au_flag_clr(sb, AuFlag_DLGT);
-+ au_sigen_inc(sb);
-+ au_reset_hinotify(inode, au_hi_flags(inode, /*isdir*/1));
-+ sbinfo = stosi(sb);
-+ sbinfo->si_failed_refresh_dirs = 0;
-+ rerr = refresh_dir(root, au_sigen(sb));
-+ if (unlikely(rerr)) {
-+ sbinfo->si_failed_refresh_dirs = 1;
-+ Warn("Refreshing directories failed, ignores (%d)\n",
-+ rerr);
-+ }
-+ au_cpup_attr_all(inode);
-+ au_flag_set(sb, dlgt);
-+ }
-+
-+ aufs_write_unlock(root);
-+ i_unlock(inode);
-+ /* braces are added to stop a warning */
-+ if (do_refresh) {
-+ sysaufs_notify_remount();
-+ }
-+
-+ out_opts:
-+ free_page((unsigned long)opts.opt);
-+ out:
-+ err = cvt_err(err);
-+ TraceErr(err);
-+ //au_debug_off();
-+ return err;
-+}
-+
-+static struct super_operations aufs_sop = {
-+ .alloc_inode = aufs_alloc_inode,
-+ .destroy_inode = aufs_destroy_inode,
-+ .read_inode = aufs_read_inode,
-+ //.dirty_inode = aufs_dirty_inode,
-+ //.write_inode = aufs_write_inode,
-+ //void (*put_inode) (struct inode *);
-+ .drop_inode = generic_delete_inode,
-+ //.delete_inode = aufs_delete_inode,
-+ //.clear_inode = aufs_clear_inode,
-+
-+ .show_options = aufs_show_options,
-+ .statfs = aufs_statfs,
-+
-+ .put_super = aufs_put_super,
-+ //void (*write_super) (struct super_block *);
-+ //int (*sync_fs)(struct super_block *sb, int wait);
-+ //void (*write_super_lockfs) (struct super_block *);
-+ //void (*unlockfs) (struct super_block *);
-+ .remount_fs = aufs_remount_fs,
-+ // depends upon umount flags. also use put_super() (< 2.6.18)
-+ .umount_begin = aufs_umount_begin
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * at first mount time.
-+ */
-+
-+static int alloc_sbinfo(struct super_block *sb)
-+{
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+
-+ sbinfo = kmalloc(sizeof(*sbinfo), GFP_KERNEL);
-+ //if (LktrCond) {kfree(sbinfo); sbinfo = NULL;}
-+ if (unlikely(!sbinfo))
-+ goto out;
-+ sbinfo->si_branch = kzalloc(sizeof(*sbinfo->si_branch), GFP_KERNEL);
-+ //if (LktrCond) {kfree(sbinfo->si_branch); sbinfo->si_branch = NULL;}
-+ if (unlikely(!sbinfo->si_branch)) {
-+ kfree(sbinfo);
-+ goto out;
-+ }
-+ rw_init_wlock(&sbinfo->si_rwsem);
-+ sbinfo->si_bend = -1;
-+ atomic_long_set(&sbinfo->si_xino, AUFS_FIRST_INO);
-+ spin_lock_init(&sbinfo->si_plink_lock);
-+ INIT_LIST_HEAD(&sbinfo->si_plink);
-+ init_lvma(sbinfo);
-+ sbinfo->si_generation = 0;
-+ sbinfo->si_last_br_id = 0;
-+ sbinfo->si_failed_refresh_dirs = 0;
-+ sbinfo->si_flags = 0;
-+ sbinfo->si_dirwh = AUFS_DIRWH_DEF;
-+ sbinfo->si_rdcache = AUFS_RDCACHE_DEF * HZ;
-+ //atomic_set(&sbinfo->si_hinotify, 0);
-+ //init_waitqueue_head(&sbinfo->si_hinotify_wq);
-+
-+ sb->s_fs_info = sbinfo;
-+ au_flag_set(sb, AuDefFlags);
-+#ifdef ForceInotify
-+ udba_set(sb, AuFlag_UDBA_INOTIFY);
-+#endif
-+#ifdef ForceDlgt
-+ au_flag_set(sb, AuFlag_DLGT);
-+#endif
-+#ifdef ForceNoPlink
-+ au_flag_clr(sb, AuFlag_PLINK);
-+#endif
-+ return 0; /* success */
-+
-+ out:
-+ TraceErr(-ENOMEM);
-+ return -ENOMEM;
-+}
-+
-+static int alloc_root(struct super_block *sb)
-+{
-+ int err;
-+ struct inode *inode;
-+ struct dentry *root;
-+
-+ TraceEnter();
-+
-+ err = -ENOMEM;
-+ inode = iget(sb, AUFS_ROOT_INO);
-+ //if (LktrCond) {iput(inode); inode = NULL;}
-+ if (unlikely(!inode))
-+ goto out;
-+ err = PTR_ERR(inode);
-+ if (IS_ERR(inode))
-+ goto out;
-+ err = -ENOMEM;
-+ if (unlikely(is_bad_inode(inode)))
-+ goto out_iput;
-+
-+ root = d_alloc_root(inode);
-+ //if (LktrCond) {igrab(inode); dput(root); root = NULL;}
-+ if (unlikely(!root))
-+ goto out_iput;
-+ err = PTR_ERR(root);
-+ if (IS_ERR(root))
-+ goto out_iput;
-+
-+ err = au_alloc_dinfo(root);
-+ //if (LktrCond){rw_write_unlock(&dtodi(root)->di_rwsem);err=-1;}
-+ if (!err) {
-+ sb->s_root = root;
-+ return 0; /* success */
-+ }
-+ dput(root);
-+ goto out; /* do not iput */
-+
-+ out_iput:
-+ iput(inode);
-+ out:
-+ TraceErr(err);
-+ return err;
-+
-+}
-+
-+static int aufs_fill_super(struct super_block *sb, void *raw_data, int silent)
-+{
-+ int err;
-+ struct dentry *root;
-+ struct inode *inode;
-+ struct opts opts;
-+ char *arg = raw_data;
-+
-+ //au_debug_on();
-+ if (unlikely(!arg || !*arg)) {
-+ err = -EINVAL;
-+ Err("no arg\n");
-+ goto out;
-+ }
-+ LKTRTrace("%s, silent %d\n", arg, silent);
-+
-+ err = -ENOMEM;
-+ memset(&opts, 0, sizeof(opts));
-+ opts.opt = (void*)__get_free_page(GFP_KERNEL);
-+ //if (LktrCond) {free_page((unsigned long)opts.opt); opts.opt = NULL;}
-+ if (unlikely(!opts.opt))
-+ goto out;
-+ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt);
-+
-+ err = alloc_sbinfo(sb);
-+ //if (LktrCond) {si_write_unlock(sb);free_sbinfo(stosi(sb));err=-1;}
-+ if (unlikely(err))
-+ goto out_opts;
-+ SiMustWriteLock(sb);
-+ /* all timestamps always follow the ones on the branch */
-+ sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
-+ sb->s_op = &aufs_sop;
-+ au_init_export_op(sb);
-+ //err = kobj_mount(stosi(sb));
-+ //if (err)
-+ //goto out_info;
-+
-+ err = alloc_root(sb);
-+ //if (LktrCond) {rw_write_unlock(&dtodi(sb->s_root)->di_rwsem);
-+ //dput(sb->s_root);sb->s_root=NULL;err=-1;}
-+ if (unlikely(err)) {
-+ DEBUG_ON(sb->s_root);
-+ si_write_unlock(sb);
-+ goto out_info;
-+ }
-+ root = sb->s_root;
-+ DiMustWriteLock(root);
-+ inode = root->d_inode;
-+ inode->i_nlink = 2;
-+
-+ /*
-+ * actually we can parse options regardless aufs lock here.
-+ * but at remount time, parsing must be done before aufs lock.
-+ * so we follow the same rule.
-+ */
-+ ii_write_lock_parent(inode);
-+ aufs_write_unlock(root);
-+ err = au_parse_opts(sb, arg, &opts);
-+ //if (LktrCond) {au_free_opts(&opts); err = -1;}
-+ if (unlikely(err))
-+ goto out_root;
-+
-+ /* lock vfs_inode first, then aufs. */
-+ i_lock(inode);
-+ inode->i_op = &aufs_dir_iop;
-+ inode->i_fop = &aufs_dir_fop;
-+ aufs_write_lock(root);
-+
-+ sb->s_maxbytes = 0;
-+ err = au_do_opts_mount(sb, &opts);
-+ //if (LktrCond) err = -1;
-+ au_free_opts(&opts);
-+ if (unlikely(err))
-+ goto out_unlock;
-+ DEBUG_ON(!sb->s_maxbytes);
-+
-+ //DbgDentry(root);
-+ aufs_write_unlock(root);
-+ i_unlock(inode);
-+ //DbgSb(sb);
-+ goto out_opts; /* success */
-+
-+ out_unlock:
-+ aufs_write_unlock(root);
-+ i_unlock(inode);
-+ out_root:
-+ dput(root);
-+ sb->s_root = NULL;
-+ out_info:
-+ free_sbinfo(stosi(sb));
-+ sb->s_fs_info = NULL;
-+ out_opts:
-+ free_page((unsigned long)opts.opt);
-+ out:
-+ TraceErr(err);
-+ err = cvt_err(err);
-+ TraceErr(err);
-+ //au_debug_off();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+static int aufs_get_sb(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *raw_data,
-+ struct vfsmount *mnt)
-+{
-+ int err;
-+
-+ /* all timestamps always follow the ones on the branch */
-+ //mnt->mnt_flags |= MNT_NOATIME | MNT_NODIRATIME;
-+ err = get_sb_nodev(fs_type, flags, raw_data, aufs_fill_super, mnt);
-+ if (!err) {
-+ struct aufs_sbinfo *sbinfo = stosi(mnt->mnt_sb);
-+ sbinfo->si_mnt = mnt;
-+ sysaufs_add(sbinfo);
-+ }
-+ return err;
-+}
-+#else
-+static struct super_block *aufs_get_sb(struct file_system_type *fs_type,
-+ int flags, const char *dev_name,
-+ void *raw_data)
-+{
-+ return get_sb_nodev(fs_type, flags, raw_data, aufs_fill_super);
-+}
-+#endif
-+
-+struct file_system_type aufs_fs_type = {
-+ .name = AUFS_FSTYPE,
-+ .fs_flags = FS_REVAL_DOT, // for UDBA and NFS branch
-+ .get_sb = aufs_get_sb,
-+ .kill_sb = generic_shutdown_super,
-+ //no need to __module_get() and module_put().
-+ .owner = THIS_MODULE,
-+};
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/super.h linux-2.6.22.1/fs/aufs/super.h
---- linux-2.6.22.1.oorig/fs/aufs/super.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/super.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,339 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: super.h,v 1.44 2007/05/14 03:39:54 sfjro Exp $ */
-+
-+#ifndef __AUFS_SUPER_H__
-+#define __AUFS_SUPER_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/version.h>
-+#include <linux/aufs_type.h>
-+#include "misc.h"
-+#include "sysaufs.h"
-+
-+#ifdef CONFIG_AUFS_SYSAUFS
-+/* entries under sysfs per mount-point */
-+enum {SysaufsSb_XINO, /* SysaufsSb_PLINK, */ SysaufsSb_Last};
-+struct sysaufs_sbinfo {
-+ au_subsys_t subsys;
-+ struct sysaufs_entry array[SysaufsSb_Last];
-+};
-+extern sysaufs_op au_si_ops[];
-+#else
-+struct sysaufs_sbinfo {};
-+#endif
-+
-+struct aufs_sbinfo {
-+ struct aufs_rwsem si_rwsem;
-+
-+ /* branch management */
-+ /* wrap around attack by superuser? No. */
-+ int si_generation;
-+
-+ /*
-+ * set true when refresh_dirs() at remount time failed.
-+ * then try refreshing dirs at access time again.
-+ * if it is false, refreshing dirs at access time is unnecesary
-+ */
-+ unsigned int si_failed_refresh_dirs:1;
-+
-+ aufs_bindex_t si_bend;
-+ aufs_bindex_t si_last_br_id;
-+ struct aufs_branch **si_branch;
-+
-+ /* mount flags */
-+ unsigned int si_flags;
-+
-+ /* external inode number table */
-+ atomic_long_t si_xino; // time bomb
-+ //struct file *si_xino_bmap;
-+
-+ /* readdir cache time, max, in HZ */
-+ unsigned long si_rdcache;
-+
-+ /*
-+ * If the number of whiteouts are larger than si_dirwh, leave all of
-+ * them after rename_whtmp to reduce the cost of rmdir(2).
-+ * future fsck.aufs or kernel thread will remove them later.
-+ * Otherwise, remove all whiteouts and the dir in rmdir(2).
-+ */
-+ unsigned int si_dirwh;
-+
-+ /* pseudo_link list */ // dirty
-+ spinlock_t si_plink_lock;
-+ struct list_head si_plink;
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+ /* super_blocks list is not exported */
-+ struct list_head si_list;
-+ struct vfsmount *si_mnt; /* no get/put */
-+#endif
-+
-+ /* sysfs */
-+ struct sysaufs_sbinfo si_sysaufs;
-+
-+#ifdef CONFIG_AUFS_HINOTIFY
-+ /* hinotify */
-+ //atomic_t si_hinotify;
-+ //wait_queue_head_t si_hinotify_wq;
-+#endif
-+
-+#ifdef CONFIG_AUFS_ROBR
-+ /* locked vma list for mmap() */ // very dirty
-+ spinlock_t si_lvma_lock;
-+ struct list_head si_lvma;
-+#endif
-+};
-+
-+/* an entry in a xino file */
-+struct xino {
-+ ino_t ino;
-+ //__u32 h_gen;
-+} __attribute__ ((packed));
-+
-+//#define AuXino_INVALID_HGEN (-1)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* Mount flags */
-+#define AuFlag_XINO 1
-+#define AuFlag_ZXINO (1 << 1)
-+#define AuFlag_PLINK (1 << 2)
-+#define AuFlag_UDBA_NONE (1 << 3)
-+#define AuFlag_UDBA_REVAL (1 << 4)
-+#define AuFlag_UDBA_INOTIFY (1 << 5)
-+#define AuFlag_WARN_PERM (1 << 6)
-+#define AuFlag_COO_NONE (1 << 7)
-+#define AuFlag_COO_LEAF (1 << 8)
-+#define AuFlag_COO_ALL (1 << 9)
-+#define AuFlag_ALWAYS_DIROPQ (1 << 10)
-+#define AuFlag_DLGT (1 << 11)
-+
-+#define AuMask_UDBA (AuFlag_UDBA_NONE | AuFlag_UDBA_REVAL \
-+ | AuFlag_UDBA_INOTIFY)
-+#define AuMask_COO (AuFlag_COO_NONE | AuFlag_COO_LEAF \
-+ | AuFlag_COO_ALL)
-+
-+#ifdef CONFIG_AUFS_COMPAT
-+#define AuDefFlag_DIROPQ AuFlag_ALWAYS_DIROPQ
-+#else
-+#define AuDefFlag_DIROPQ 0
-+#endif
-+
-+#define AuDefFlags_COMM (AuFlag_XINO | AuFlag_UDBA_REVAL | AuFlag_WARN_PERM \
-+ | AuFlag_COO_NONE | AuDefFlag_DIROPQ)
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
-+#define AuDefFlags (AuDefFlags_COMM | AuFlag_PLINK)
-+#else
-+#define AuDefFlags AuDefFlags_COMM
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* flags for aufs_read_lock()/di_read_lock() */
-+#define AUFS_D_WLOCK 1
-+#define AUFS_I_RLOCK 2
-+#define AUFS_I_WLOCK 4
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* super.c */
-+int au_show_brs(struct seq_file *seq, struct super_block *sb);
-+
-+/* xino.c */
-+struct file *xino_create(struct super_block *sb, char *fname, int silent,
-+ struct dentry *parent);
-+ino_t xino_new_ino(struct super_block *sb);
-+int xino_write0(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino);
-+int xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ struct xino *xino);
-+int xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ struct xino *xino);
-+int xino_init(struct super_block *sb, aufs_bindex_t bindex,
-+ struct file *base_file, int do_test);
-+struct opt_xino;
-+int xino_set(struct super_block *sb, struct opt_xino *xino, int remount);
-+int xino_clr(struct super_block *sb);
-+struct file *xino_def(struct super_block *sb);
-+
-+/* sbinfo.c */
-+struct aufs_sbinfo *stosi(struct super_block *sb);
-+aufs_bindex_t sbend(struct super_block *sb);
-+struct aufs_branch *stobr(struct super_block *sb, aufs_bindex_t bindex);
-+int au_sigen(struct super_block *sb);
-+int au_sigen_inc(struct super_block *sb);
-+int find_bindex(struct super_block *sb, struct aufs_branch *br);
-+
-+void aufs_read_lock(struct dentry *dentry, int flags);
-+void aufs_read_unlock(struct dentry *dentry, int flags);
-+void aufs_write_lock(struct dentry *dentry);
-+void aufs_write_unlock(struct dentry *dentry);
-+void aufs_read_and_write_lock2(struct dentry *d1, struct dentry *d2, int isdir);
-+void aufs_read_and_write_unlock2(struct dentry *d1, struct dentry *d2);
-+
-+aufs_bindex_t new_br_id(struct super_block *sb);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline const char *au_sbtype(struct super_block *sb)
-+{
-+ return sb->s_type->name;
-+}
-+
-+static inline int au_is_aufs(struct super_block *sb)
-+{
-+ return !strcmp(au_sbtype(sb), AUFS_FSTYPE);
-+}
-+
-+static inline int au_is_nfs(struct super_block *sb)
-+{
-+#if defined(CONFIG_NFS_FS) || defined(CONFIG_NFS_FS_MODULE)
-+ return !strcmp(au_sbtype(sb), "nfs");
-+#else
-+ return 0;
-+#endif
-+}
-+
-+static inline int au_is_remote(struct super_block *sb)
-+{
-+ return au_is_nfs(sb);
-+}
-+
-+#ifdef CONFIG_AUFS_EXPORT
-+static inline void au_init_export_op(struct super_block *sb)
-+{
-+ extern struct export_operations aufs_export_op;
-+ sb->s_export_op = &aufs_export_op;
-+}
-+
-+static inline int au_is_nfsd(struct task_struct *tsk)
-+{
-+ return (!tsk->mm && !strcmp(tsk->comm, "nfsd"));
-+}
-+
-+static inline void au_nfsd_lockdep_off(void)
-+{
-+ /* braces are added to stop a warning */
-+ if (au_is_nfsd(current)) {
-+ lockdep_off();
-+ }
-+}
-+
-+static inline void au_nfsd_lockdep_on(void)
-+{
-+ /* braces are added to stop a warning */
-+ if (au_is_nfsd(current)) {
-+ lockdep_on();
-+ }
-+}
-+#else
-+static inline int au_is_nfsd(struct task_struct *tsk)
-+{
-+ return 0;
-+}
-+static inline void au_init_export_op(struct super_block *sb)
-+{
-+ /* nothing */
-+}
-+#define au_nfsd_lockdep_off() /* */
-+#define au_nfsd_lockdep_on() /* */
-+#endif /* CONFIG_AUFS_EXPORT */
-+
-+static inline void init_lvma(struct aufs_sbinfo *sbinfo)
-+{
-+#ifdef CONFIG_AUFS_ROBR
-+ spin_lock_init(&sbinfo->si_lvma_lock);
-+ INIT_LIST_HEAD(&sbinfo->si_lvma);
-+#else
-+ /* nothing */
-+#endif
-+}
-+
-+/* limited support before 2.6.18 */
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
-+static inline void au_mntget(struct super_block *sb)
-+{
-+ mntget(stosi(sb)->si_mnt);
-+}
-+
-+static inline void au_mntput(struct super_block *sb)
-+{
-+ mntput(stosi(sb)->si_mnt);
-+}
-+#else
-+static inline void au_mntget(struct super_block *sb)
-+{
-+ /* empty */
-+}
-+
-+static inline void au_mntput(struct super_block *sb)
-+{
-+ /* empty */
-+}
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline void au_flag_set(struct super_block *sb, unsigned int flag)
-+{
-+ //SiMustWriteLock(sb);
-+ stosi(sb)->si_flags |= flag;
-+}
-+
-+static inline void au_flag_clr(struct super_block *sb, unsigned int flag)
-+{
-+ //SiMustWriteLock(sb);
-+ stosi(sb)->si_flags &= ~flag;
-+}
-+
-+static inline
-+unsigned int au_flag_test(struct super_block *sb, unsigned int flag)
-+{
-+ //SiMustAnyLock(sb);
-+ return stosi(sb)->si_flags & flag;
-+}
-+
-+static inline unsigned int au_flag_test_udba(struct super_block *sb)
-+{
-+ return au_flag_test(sb, AuMask_UDBA);
-+}
-+
-+static inline unsigned int au_flag_test_coo(struct super_block *sb)
-+{
-+ return au_flag_test(sb, AuMask_COO);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* lock superblock. mainly for entry point functions */
-+/*
-+ * si_read_lock, si_write_lock,
-+ * si_read_unlock, si_write_unlock, si_downgrade_lock
-+ */
-+SimpleRwsemFuncs(si, struct super_block *sb, stosi(sb)->si_rwsem);
-+
-+/* to debug easier, do not make them inlined functions */
-+#define SiMustReadLock(sb) RwMustReadLock(&stosi(sb)->si_rwsem)
-+#define SiMustWriteLock(sb) RwMustWriteLock(&stosi(sb)->si_rwsem)
-+#define SiMustAnyLock(sb) RwMustAnyLock(&stosi(sb)->si_rwsem)
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_SUPER_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/sysaufs.c linux-2.6.22.1/fs/aufs/sysaufs.c
---- linux-2.6.22.1.oorig/fs/aufs/sysaufs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/sysaufs.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,620 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: sysaufs.c,v 1.6 2007/05/14 03:40:10 sfjro Exp $ */
-+
-+#include <linux/module.h>
-+#include <linux/seq_file.h>
-+#include <linux/sysfs.h>
-+#include "aufs.h"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* super_blocks list is not exported */
-+static DEFINE_MUTEX(aufs_sbilist_mtx);
-+static LIST_HEAD(aufs_sbilist);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+typedef ssize_t (*rwfunc_t)(struct kobject *kobj, char *buf, loff_t offset,
-+ size_t sz, struct sysaufs_args *args);
-+static ssize_t sysaufs_read(struct kobject *kobj, char *buf, loff_t offset,
-+ size_t sz, struct sysaufs_args *args);
-+static ssize_t sysaufs_free_write(struct kobject *kobj, char *buf, loff_t
-+ offset, size_t sz, struct sysaufs_args *args);
-+
-+#define GFunc(name, _index, func) \
-+static ssize_t name(struct kobject *kobj, char *buf, loff_t offset, size_t sz) \
-+{ \
-+ struct sysaufs_args args = { \
-+ .index = (_index), \
-+ .mtx = &aufs_sbilist_mtx, \
-+ .sb = NULL \
-+ }; \
-+ return func(kobj, buf, offset, sz, &args); \
-+}
-+
-+#define GFuncs(name, _index) \
-+ GFunc(read_##name, _index, sysaufs_read); \
-+ GFunc(write_##name, _index, sysaufs_free_write);
-+
-+static struct super_block *find_sb_locked(struct kobject *kobj)
-+{
-+ struct super_block *sb;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+ MtxMustLock(&aufs_sbilist_mtx);
-+
-+ sb = NULL;
-+ list_for_each_entry(sbinfo, &aufs_sbilist, si_list) {
-+ if (&au_subsys_to_kset(sbinfo->si_sysaufs.subsys).kobj != kobj)
-+ continue;
-+ sb = sbinfo->si_mnt->mnt_sb;
-+ si_read_lock(sb);
-+ break;
-+ }
-+ return sb;
-+}
-+
-+static ssize_t sb_func(struct kobject *kobj, char *buf, loff_t offset,
-+ size_t sz, struct sysaufs_args *args, rwfunc_t func)
-+{
-+ ssize_t err;
-+
-+ err = -ENOENT;
-+ mutex_lock(&aufs_sbilist_mtx);
-+ args->sb = find_sb_locked(kobj);
-+ if (args->sb) {
-+ err = func(kobj, buf, offset, sz, args);
-+ si_read_unlock(args->sb);
-+ }
-+ mutex_unlock(&aufs_sbilist_mtx);
-+ return err;
-+}
-+
-+#define SbFunc(name, _index, func) \
-+static ssize_t name(struct kobject *kobj, char *buf, loff_t offset, size_t sz) \
-+{ \
-+ struct sysaufs_args args = { \
-+ .index = (_index), \
-+ .mtx = NULL \
-+ }; \
-+ return sb_func(kobj, buf, offset, sz, &args, func); \
-+}
-+
-+#define SbFuncs(name, index) \
-+ SbFunc(read_##name, index, sysaufs_read); \
-+ SbFunc(write_##name, index, sysaufs_free_write)
-+
-+static decl_subsys(aufs, NULL, NULL);
-+enum {Brs, Stat, Config, _Last};
-+static struct sysaufs_entry g_array[_Last];
-+GFuncs(brs, Brs);
-+GFuncs(stat, Stat);
-+GFuncs(config, Config);
-+
-+SbFuncs(xino, SysaufsSb_XINO);
-+
-+#define SetEntry(e, _name, init_size, _ops) \
-+ do { \
-+ (e)->attr.attr.name = #_name; \
-+ (e)->attr.attr.owner = THIS_MODULE; \
-+ (e)->attr.attr.mode = S_IRUGO | S_IWUSR; \
-+ (e)->attr.read = read_##_name; \
-+ (e)->attr.write = write_##_name; \
-+ (e)->allocated = init_size; \
-+ (e)->err = -1; \
-+ (e)->ops = _ops; \
-+ } while (0)
-+
-+#define Priv(e) (e)->attr.private
-+#define Allocated(e) (e)->allocated
-+#define Len(e) (e)->attr.size
-+#define Name(e) attr_name((e)->attr)
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void free_entry(struct sysaufs_entry *e)
-+{
-+ MtxMustLock(&aufs_sbilist_mtx);
-+ DEBUG_ON(!Priv(e));
-+
-+ if (Allocated(e) > 0)
-+ kfree(Priv(e));
-+ else
-+ free_pages((unsigned long)Priv(e), -Allocated(e));
-+ Priv(e) = NULL;
-+ Len(e) = 0;
-+}
-+
-+static void free_entries(void)
-+{
-+ static int a[] = {Brs, -1};
-+ int *p = a;
-+
-+ MtxMustLock(&aufs_sbilist_mtx);
-+
-+ while (*p >= 0) {
-+ if (Priv(g_array + *p))
-+ free_entry(g_array + *p);
-+ p++;
-+ }
-+}
-+
-+static int alloc_entry(struct sysaufs_entry *e)
-+{
-+ MtxMustLock(&aufs_sbilist_mtx);
-+ DEBUG_ON(Priv(e));
-+ //Dbg("%d\n", Allocated(e));
-+
-+ if (Allocated(e) > 0)
-+ Priv(e) = kmalloc(Allocated(e), GFP_KERNEL);
-+ else
-+ Priv(e) = (void*)__get_free_pages(GFP_KERNEL, -Allocated(e));
-+ if (Priv(e))
-+ return 0;
-+ return -ENOMEM;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void unreg(au_subsys_t *subsys, struct sysaufs_entry *a, int n,
-+ au_subsys_t *parent)
-+{
-+ int i;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < n; i++, a++)
-+ if (!a->err) {
-+ sysfs_remove_bin_file
-+ (&au_subsys_to_kset(*subsys).kobj, &a->attr);
-+ if (Priv(a))
-+ free_entry(a);
-+ }
-+
-+ subsystem_unregister(subsys);
-+ subsys_put(parent);
-+}
-+
-+static int reg(au_subsys_t *subsys, struct sysaufs_entry *a, int n,
-+ au_subsys_t *parent)
-+{
-+ int err, i;
-+
-+ TraceEnter();
-+
-+ subsys_get(parent);
-+ kobj_set_kset_s(&au_subsys_to_kset(*subsys), *parent);
-+ err = subsystem_register(subsys);
-+ if (unlikely(err))
-+ goto out;
-+
-+ for (i = 0; !err && i < n; i++)
-+ err = a[i].err = sysfs_create_bin_file
-+ (&au_subsys_to_kset(*subsys).kobj, &a[i].attr);
-+ if (unlikely(err))
-+ unreg(subsys, a, n, parent);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define SbSetEntry(index, name, init_size) \
-+ SetEntry(sa->array + index, name, init_size, au_si_ops);
-+
-+void sysaufs_add(struct aufs_sbinfo *sbinfo)
-+{
-+ int err;
-+ struct sysaufs_sbinfo *sa = &sbinfo->si_sysaufs;
-+
-+ TraceEnter();
-+
-+ mutex_lock(&aufs_sbilist_mtx);
-+ list_add_tail(&sbinfo->si_list, &aufs_sbilist);
-+ free_entries();
-+
-+ memset(sa, 0, sizeof(*sa));
-+ SbSetEntry(SysaufsSb_XINO, xino, 128);
-+ err = kobject_set_name(&au_subsys_to_kset(sa->subsys).kobj, "%p",
-+ sbinfo->si_mnt->mnt_sb);
-+ if (!err)
-+ err = reg(&sa->subsys, sa->array, ARRAY_SIZE(sa->array),
-+ &aufs_subsys);
-+ if (unlikely(err))
-+ Warn("failed adding sysfs (%d)\n", err);
-+
-+ mutex_unlock(&aufs_sbilist_mtx);
-+}
-+
-+void sysaufs_del(struct aufs_sbinfo *sbinfo)
-+{
-+ struct sysaufs_sbinfo *sa = &sbinfo->si_sysaufs;
-+
-+ TraceEnter();
-+
-+ mutex_lock(&aufs_sbilist_mtx);
-+ unreg(&sa->subsys, sa->array, ARRAY_SIZE(sa->array), &aufs_subsys);
-+ list_del(&sbinfo->si_list);
-+ free_entries();
-+ mutex_unlock(&aufs_sbilist_mtx);
-+}
-+
-+void sysaufs_notify_remount(void)
-+{
-+ mutex_lock(&aufs_sbilist_mtx);
-+ free_entries();
-+ mutex_unlock(&aufs_sbilist_mtx);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int make_brs(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size)
-+{
-+ int err;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ TraceEnter();
-+ MtxMustLock(&aufs_sbilist_mtx);
-+ DEBUG_ON(args->index != Brs);
-+
-+ err = 0;
-+ list_for_each_entry(sbinfo, &aufs_sbilist, si_list) {
-+ struct super_block *sb;
-+ struct dentry *root;
-+ struct vfsmount *mnt;
-+
-+ sb = sbinfo->si_mnt->mnt_sb;
-+ root = sb->s_root;
-+ aufs_read_lock(root, !AUFS_I_RLOCK);
-+ mnt = sbinfo->si_mnt;
-+ err = seq_escape
-+ (seq, mnt->mnt_devname ? mnt->mnt_devname : "none",
-+ au_esc_chars);
-+ if (!err)
-+ err = seq_putc(seq, ' ');
-+ if (!err)
-+ err = seq_path(seq, mnt, root, au_esc_chars);
-+ if (err > 0)
-+ err = seq_printf(seq, " %p br:", sb);
-+ if (!err)
-+ err = au_show_brs(seq, sb);
-+ aufs_read_unlock(root, !AUFS_I_RLOCK);
-+ if (!err)
-+ err = seq_putc(seq, '\n');
-+ else
-+ break;
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int make_config(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size)
-+{
-+ int err;
-+
-+ TraceEnter();
-+ DEBUG_ON(args->index != Config);
-+
-+#ifdef CONFIG_AUFS
-+ err = seq_puts(seq, "CONFIG_AUFS=y\n");
-+#else
-+ err = seq_puts(seq, "CONFIG_AUFS=m\n");
-+#endif
-+
-+#define puts(m, v) \
-+ if (!err) err = seq_puts(seq, "CONFIG_AUFS_" #m "=" #v "\n")
-+#define puts_bool(m) puts(m, y)
-+#define puts_mod(m) puts(m, m)
-+
-+#ifdef CONFIG_AUFS_FAKE_DM
-+ puts_bool(FAKE_DM);
-+#endif
-+#ifdef CONFIG_AUFS_BRANCH_MAX_127
-+ puts_bool(BRANCH_MAX_127);
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_511)
-+ puts_bool(BRANCH_MAX_511);
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_1023)
-+ puts_bool(BRANCH_MAX_1023);
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_32767)
-+ puts_bool(BRANCH_MAX_32767);
-+#endif
-+ puts_bool(SYSAUFS);
-+#ifdef CONFIG_AUFS_HINOTIFY
-+ puts_bool(HINOTIFY);
-+#endif
-+#ifdef CONFIG_AUFS_EXPORT
-+ puts_bool(EXPORT);
-+#endif
-+#ifdef CONFIG_AUFS_ROBR
-+ puts_bool(ROBR);
-+#endif
-+#ifdef CONFIG_AUFS_DLGT
-+ puts_bool(DLGT);
-+#endif
-+#ifdef CONFIG_AUFS_LHASH_PATCH
-+ puts_bool(LHASH_PATCH);
-+#endif
-+#ifdef CONFIG_AUFS_KSIZE_PATCH
-+ puts_bool(KSIZE_PATCH);
-+#endif
-+#ifdef CONFIG_AUFS_DEBUG
-+ puts_bool(DEBUG);
-+#endif
-+#ifdef CONFIG_AUFS_COMPAT
-+ puts_bool(COMPAT);
-+#endif
-+
-+#undef puts_bool
-+#undef puts
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int make_stat(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size)
-+{
-+ int err, i;
-+
-+ TraceEnter();
-+ DEBUG_ON(args->index != Stat);
-+
-+ *do_size = 0;
-+ err = seq_puts(seq, "wkq max_busy:");
-+ for (i = 0; !err && i < aufs_nwkq; i++)
-+ err = seq_printf(seq, " %u", au_wkq[i].max_busy);
-+ if (!err)
-+ err = seq_printf(seq, ", %u(generic)\n",
-+ au_wkq[aufs_nwkq].max_busy);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static int make(struct sysaufs_entry *e, struct sysaufs_args *args,
-+ int *do_size)
-+
-+{
-+ int err;
-+ struct seq_file *seq;
-+
-+ TraceEnter();
-+ DEBUG_ON(Priv(e));
-+ MtxMustLock(&aufs_sbilist_mtx);
-+
-+ err = -ENOMEM;
-+ seq = kzalloc(sizeof(*seq), GFP_KERNEL);
-+ if (unlikely(!seq))
-+ goto out;
-+
-+ Len(e) = 0;
-+ while (1) {
-+ err = alloc_entry(e);
-+ if (unlikely(err))
-+ break;
-+
-+ //mutex_init(&seq.lock);
-+ seq->buf = Priv(e);
-+ seq->count = 0;
-+ seq->size = Allocated(e);
-+ if (unlikely(Allocated(e) <= 0))
-+ seq->size = PAGE_SIZE << -Allocated(e);
-+
-+ err = e->ops[args->index](seq, args, do_size);
-+ if (!err) {
-+ Len(e) = seq->count;
-+ break; /* success */
-+ }
-+
-+ free_entry(e);
-+ if (Allocated(e) > 0) {
-+ Allocated(e) <<= 1;
-+ if (unlikely(Allocated(e) >= (int)PAGE_SIZE))
-+ Allocated(e) = 0;
-+ } else
-+ Allocated(e)--;
-+ //Dbg("%d\n", Allocated(e));
-+ }
-+ kfree(seq);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* why does sysfs pass my parent kobject? */
-+static struct dentry *find_me(struct dentry *parent, struct sysaufs_entry *e)
-+{
-+#if 1
-+ struct dentry *dentry;
-+ const char *name = Name(e);
-+ const unsigned int len = strlen(name);
-+
-+ //Dbg("%.*s\n", DLNPair(parent));
-+ spin_lock(&dcache_lock);
-+ list_for_each_entry(dentry, &parent->d_subdirs, D_CHILD) {
-+ //Dbg("%.*s\n", DLNPair(dentry));
-+ if (len == dentry->d_name.len
-+ && !strcmp(dentry->d_name.name, name)) {
-+ spin_unlock(&dcache_lock);
-+ return dentry;
-+ }
-+ }
-+ spin_unlock(&dcache_lock);
-+#endif
-+ return NULL;
-+}
-+
-+static ssize_t sysaufs_read(struct kobject *kobj, char *buf, loff_t offset,
-+ size_t sz, struct sysaufs_args *args)
-+{
-+ ssize_t err;
-+ loff_t len;
-+ struct dentry *d;
-+ struct sysaufs_entry *e;
-+ int do_size;
-+
-+ LKTRTrace("{%d, %p}, offset %Ld, sz %lu\n",
-+ args->index, args->sb, offset, (unsigned long)sz);
-+
-+ if (unlikely(!sz))
-+ return 0;
-+
-+ err = 0;
-+ d = NULL;
-+ e = g_array + args->index;
-+ if (args->sb)
-+ e = stosi(args->sb)->si_sysaufs.array + args->index;
-+
-+ do_size = 1;
-+ if (args->mtx)
-+ mutex_lock(args->mtx);
-+ if (unlikely(!Priv(e))) {
-+ err = make(e, args, &do_size);
-+ DEBUG_ON(Len(e) > INT_MAX);
-+ if (do_size) {
-+ d = find_me(kobj->dentry, e);
-+ if (d)
-+ i_size_write(d->d_inode, Len(e));
-+ }
-+ }
-+
-+ if (!err) {
-+ err = len = Len(e) - offset;
-+ LKTRTrace("%Ld\n", len);
-+ if (len > 0) {
-+ if (len > sz)
-+ err = sz;
-+ memcpy(buf, Priv(e) + offset, err);
-+ }
-+
-+ if (!do_size)
-+ free_entry(e);
-+ }
-+ if (args->mtx)
-+ mutex_unlock(args->mtx);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static ssize_t sysaufs_free_write(struct kobject *kobj, char *buf,
-+ loff_t offset, size_t sz,
-+ struct sysaufs_args *args)
-+{
-+ struct dentry *d;
-+ int allocated, len;
-+ struct sysaufs_entry *e;
-+
-+ LKTRTrace("{%d, %p}\n", args->index, args->sb);
-+
-+ e = g_array + args->index;
-+ if (args->sb)
-+ e = stosi(args->sb)->si_sysaufs.array + args->index;
-+
-+ if (args->mtx)
-+ mutex_lock(args->mtx);
-+ if (Priv(e)) {
-+ allocated = Allocated(e);
-+ if (unlikely(allocated <= 0))
-+ allocated = PAGE_SIZE << -allocated;
-+ allocated >>= 1;
-+ len = Len(e);
-+
-+ free_entry(e);
-+ if (unlikely(len <= allocated)) {
-+ if (Allocated(e) >= 0)
-+ Allocated(e) = allocated;
-+ else
-+ Allocated(e)++;
-+ }
-+
-+ d = find_me(kobj->dentry, e);
-+ if (d && i_size_read(d->d_inode))
-+ i_size_write(d->d_inode, 0);
-+ }
-+ if (args->mtx)
-+ mutex_unlock(args->mtx);
-+
-+ return sz;
-+}
-+
-+static sysaufs_op g_ops[] = {
-+ [Brs] = make_brs,
-+ [Stat] = make_stat,
-+ [Config] = make_config
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#define GSetEntry(index, name, init_size) \
-+ SetEntry(g_array + index, name, init_size, g_ops)
-+
-+int __init sysaufs_init(void)
-+{
-+ int err;
-+
-+ GSetEntry(Brs, brs, 128);
-+ GSetEntry(Stat, stat, 32);
-+ GSetEntry(Config, config, 256);
-+ err = reg(&aufs_subsys, g_array, ARRAY_SIZE(g_array), &fs_subsys);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+void __exit sysaufs_fin(void)
-+{
-+ mutex_lock(&aufs_sbilist_mtx);
-+ unreg(&aufs_subsys, g_array, ARRAY_SIZE(g_array), &fs_subsys);
-+ mutex_unlock(&aufs_sbilist_mtx);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef DbgDlgt
-+int is_branch(struct super_block *h_sb)
-+{
-+ int found = 0;
-+ struct aufs_sbinfo *sbinfo;
-+
-+ //Dbg("here\n");
-+ mutex_lock(&aufs_sbilist_mtx);
-+ list_for_each_entry(sbinfo, &aufs_sbilist, si_list) {
-+ aufs_bindex_t bindex, bend;
-+ struct super_block *sb;
-+
-+ sb = sbinfo->si_mnt->mnt_sb;
-+ si_read_lock(sb);
-+ bend = sbend(sb);
-+ for (bindex = 0; !found && bindex <= bend; bindex++)
-+ found = (h_sb == sbr_sb(sb, bindex));
-+ si_read_unlock(sb);
-+ }
-+ mutex_unlock(&aufs_sbilist_mtx);
-+ return found;
-+}
-+#endif
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/sysaufs.h linux-2.6.22.1/fs/aufs/sysaufs.h
---- linux-2.6.22.1.oorig/fs/aufs/sysaufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/sysaufs.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,83 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: sysaufs.h,v 1.3 2007/05/14 06:27:18 sfjro Exp $ */
-+
-+#ifndef __SYSAUFS_H__
-+#define __SYSAUFS_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/seq_file.h>
-+#include <linux/sysfs.h>
-+#include <linux/version.h>
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
-+typedef struct kset au_subsys_t;
-+#define au_subsys_to_kset(subsys) (subsys)
-+#else
-+typedef struct subsystem au_subsys_t;
-+#define au_subsys_to_kset(subsys) ((subsys).kset)
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* arguments for an entry under sysfs */
-+struct sysaufs_args {
-+ int index;
-+ struct mutex *mtx;
-+ struct super_block *sb;
-+};
-+
-+typedef int (*sysaufs_op)(struct seq_file *seq, struct sysaufs_args *args,
-+ int *do_size);
-+
-+/* an entry under sysfs */
-+struct sysaufs_entry {
-+ struct bin_attribute attr;
-+ int allocated; /* zero minus means pages */
-+ int err;
-+ sysaufs_op *ops;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct aufs_sbinfo;
-+#ifdef CONFIG_AUFS_SYSAUFS
-+void sysaufs_add(struct aufs_sbinfo *sbinfo);
-+void sysaufs_del(struct aufs_sbinfo *sbinfo);
-+int __init sysaufs_init(void);
-+void sysaufs_fin(void);
-+void sysaufs_notify_remount(void);
-+#else
-+static inline void sysaufs_add(struct aufs_sbinfo *sbinfo)
-+{
-+ /* nothing */
-+}
-+
-+static inline void sysaufs_del(struct aufs_sbinfo *sbinfo)
-+{
-+ /* nothing */
-+}
-+#define sysaufs_init() 0
-+#define sysaufs_fin() /* */
-+#define sysaufs_notify_remount() /* */
-+#endif /* CONFIG_AUFS_SYSAUFS */
-+
-+#endif /* __KERNEL__ */
-+#endif /* __SYSAUFS_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/vdir.c linux-2.6.22.1/fs/aufs/vdir.c
---- linux-2.6.22.1.oorig/fs/aufs/vdir.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/vdir.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,802 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: vdir.c,v 1.22 2007/05/14 03:38:52 sfjro Exp $ */
-+
-+#include "aufs.h"
-+
-+static int calc_size(int namelen)
-+{
-+ int sz;
-+
-+ sz = sizeof(struct aufs_de) + namelen;
-+ if (sizeof(ino_t) == sizeof(long)) {
-+ const int mask = sizeof(ino_t) - 1;
-+ if (sz & mask) {
-+ sz += sizeof(ino_t);
-+ sz &= ~mask;
-+ }
-+ } else {
-+#if 0 // remove
-+ BUG();
-+ // this block will be discarded by optimizer.
-+ int m;
-+ m = sz % sizeof(ino_t);
-+ if (m)
-+ sz += sizeof(ino_t) - m;
-+#endif
-+ }
-+
-+ DEBUG_ON(sz % sizeof(ino_t));
-+ return sz;
-+}
-+
-+static int set_deblk_end(union aufs_deblk_p *p, union aufs_deblk_p *deblk_end)
-+{
-+ if (calc_size(0) <= deblk_end->p - p->p) {
-+ p->de->de_str.len = 0;
-+ //smp_mb();
-+ return 0;
-+ }
-+ return -1; // error
-+}
-+
-+/* returns true or false */
-+static int is_deblk_end(union aufs_deblk_p *p, union aufs_deblk_p *deblk_end)
-+{
-+ if (calc_size(0) <= deblk_end->p - p->p)
-+ return !p->de->de_str.len;
-+ return 1;
-+}
-+
-+static aufs_deblk_t *last_deblk(struct aufs_vdir *vdir)
-+{
-+ return vdir->vd_deblk[vdir->vd_nblk - 1];
-+}
-+
-+void nhash_init(struct aufs_nhash *nhash)
-+{
-+ int i;
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++)
-+ INIT_HLIST_HEAD(nhash->heads + i);
-+}
-+
-+struct aufs_nhash *nhash_new(gfp_t gfp)
-+{
-+ struct aufs_nhash *nhash;
-+
-+ nhash = kmalloc(sizeof(*nhash), gfp);
-+ if (nhash) {
-+ nhash_init(nhash);
-+ return nhash;
-+ }
-+ return ERR_PTR(-ENOMEM);
-+}
-+
-+void nhash_del(struct aufs_nhash *nhash)
-+{
-+ nhash_fin(nhash);
-+ kfree(nhash);
-+}
-+
-+void nhash_move(struct aufs_nhash *dst, struct aufs_nhash *src)
-+{
-+ int i;
-+
-+ TraceEnter();
-+
-+ //DbgWhlist(src);
-+ *dst = *src;
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ struct hlist_head *h;
-+ h = dst->heads + i;
-+ if (h->first)
-+ h->first->pprev = &h->first;
-+ INIT_HLIST_HEAD(src->heads + i);
-+ }
-+ //DbgWhlist(src);
-+ //DbgWhlist(dst);
-+ //smp_mb();
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void nhash_fin(struct aufs_nhash *whlist)
-+{
-+ int i;
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos, *n;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ head = whlist->heads + i;
-+ hlist_for_each_entry_safe(tpos, pos, n, head, wh_hash) {
-+ //hlist_del(pos);
-+ kfree(tpos);
-+ }
-+ }
-+}
-+
-+int is_longer_wh(struct aufs_nhash *whlist, aufs_bindex_t btgt, int limit)
-+{
-+ int n, i;
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos;
-+
-+ LKTRTrace("limit %d\n", limit);
-+ //return 1;
-+
-+ n = 0;
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ head = whlist->heads + i;
-+ hlist_for_each_entry(tpos, pos, head, wh_hash)
-+ if (tpos->wh_bindex == btgt && ++n > limit)
-+ return 1;
-+ }
-+ return 0;
-+}
-+
-+/* returns found(true) or not */
-+int test_known_wh(struct aufs_nhash *whlist, char *name, int namelen)
-+{
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos;
-+ struct aufs_destr *str;
-+
-+ LKTRTrace("%.*s\n", namelen, name);
-+
-+ head = whlist->heads + au_name_hash(name, namelen);
-+ hlist_for_each_entry(tpos, pos, head, wh_hash) {
-+ str = &tpos->wh_str;
-+ LKTRTrace("%.*s\n", str->len, str->name);
-+ if (str->len == namelen && !memcmp(str->name, name, namelen))
-+ return 1;
-+ }
-+ return 0;
-+}
-+
-+int append_wh(struct aufs_nhash *whlist, char *name, int namelen,
-+ aufs_bindex_t bindex)
-+{
-+ int err;
-+ struct aufs_destr *str;
-+ struct aufs_wh *wh;
-+
-+ LKTRTrace("%.*s\n", namelen, name);
-+
-+ err = -ENOMEM;
-+ wh = kmalloc(sizeof(*wh) + namelen, GFP_KERNEL);
-+ if (unlikely(!wh))
-+ goto out;
-+ err = 0;
-+ wh->wh_bindex = bindex;
-+ str = &wh->wh_str;
-+ str->len = namelen;
-+ memcpy(str->name, name, namelen);
-+ hlist_add_head(&wh->wh_hash,
-+ whlist->heads + au_name_hash(name, namelen));
-+ //smp_mb();
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+void free_vdir(struct aufs_vdir *vdir)
-+{
-+ aufs_deblk_t **deblk;
-+
-+ TraceEnter();
-+
-+ deblk = vdir->vd_deblk;
-+ while (vdir->vd_nblk--) {
-+ kfree(*deblk);
-+ deblk++;
-+ }
-+ kfree(vdir->vd_deblk);
-+ cache_free_vdir(vdir);
-+}
-+
-+static int append_deblk(struct aufs_vdir *vdir)
-+{
-+ int err, sz, i;
-+ aufs_deblk_t **o;
-+ union aufs_deblk_p p, deblk_end;
-+
-+ TraceEnter();
-+
-+ err = -ENOMEM;
-+ sz = sizeof(*o) * vdir->vd_nblk;
-+ o = au_kzrealloc(vdir->vd_deblk, sz, sz + sizeof(*o), GFP_KERNEL);
-+ if (unlikely(!o))
-+ goto out;
-+ vdir->vd_deblk = o;
-+ p.deblk = kmalloc(sizeof(*p.deblk), GFP_KERNEL);
-+ if (p.deblk) {
-+ i = vdir->vd_nblk++;
-+ vdir->vd_deblk[i] = p.deblk;
-+ vdir->vd_last.i = i;
-+ vdir->vd_last.p.p = p.p;
-+ deblk_end.deblk = p.deblk + 1;
-+ err = set_deblk_end(&p, &deblk_end);
-+ DEBUG_ON(err);
-+ }
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static struct aufs_vdir *alloc_vdir(void)
-+{
-+ struct aufs_vdir *vdir;
-+ int err;
-+
-+ TraceEnter();
-+
-+ err = -ENOMEM;
-+ vdir = cache_alloc_vdir();
-+ if (unlikely(!vdir))
-+ goto out;
-+ vdir->vd_deblk = kzalloc(sizeof(*vdir->vd_deblk), GFP_KERNEL);
-+ if (unlikely(!vdir->vd_deblk))
-+ goto out_free;
-+
-+ vdir->vd_nblk = 0;
-+ vdir->vd_version = 0;
-+ vdir->vd_jiffy = 0;
-+ err = append_deblk(vdir);
-+ if (!err)
-+ return vdir; /* success */
-+
-+ kfree(vdir->vd_deblk);
-+
-+ out_free:
-+ cache_free_vdir(vdir);
-+ out:
-+ vdir = ERR_PTR(err);
-+ TraceErrPtr(vdir);
-+ return vdir;
-+}
-+
-+static int reinit_vdir(struct aufs_vdir *vdir)
-+{
-+ int err;
-+ union aufs_deblk_p p, deblk_end;
-+
-+ TraceEnter();
-+
-+ while (vdir->vd_nblk > 1) {
-+ kfree(vdir->vd_deblk[vdir->vd_nblk - 1]);
-+ vdir->vd_deblk[vdir->vd_nblk - 1] = NULL;
-+ vdir->vd_nblk--;
-+ }
-+ p.deblk = vdir->vd_deblk[0];
-+ deblk_end.deblk = p.deblk + 1;
-+ err = set_deblk_end(&p, &deblk_end);
-+ DEBUG_ON(err);
-+ vdir->vd_version = 0;
-+ vdir->vd_jiffy = 0;
-+ vdir->vd_last.i = 0;
-+ vdir->vd_last.p.deblk = vdir->vd_deblk[0];
-+ //smp_mb();
-+ //DbgVdir(vdir);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void free_dehlist(struct aufs_nhash *dehlist)
-+{
-+ int i;
-+ struct hlist_head *head;
-+ struct aufs_dehstr *tpos;
-+ struct hlist_node *pos, *n;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < AUFS_NHASH_SIZE; i++) {
-+ head = dehlist->heads + i;
-+ hlist_for_each_entry_safe(tpos, pos, n, head, hash) {
-+ //hlist_del(pos);
-+ cache_free_dehstr(tpos);
-+ }
-+ }
-+}
-+
-+/* returns found(true) or not */
-+static int test_known(struct aufs_nhash *delist, char *name, int namelen)
-+{
-+ struct hlist_head *head;
-+ struct aufs_dehstr *tpos;
-+ struct hlist_node *pos;
-+ struct aufs_destr *str;
-+
-+ LKTRTrace("%.*s\n", namelen, name);
-+
-+ head = delist->heads + au_name_hash(name, namelen);
-+ hlist_for_each_entry(tpos, pos, head, hash) {
-+ str = tpos->str;
-+ LKTRTrace("%.*s\n", str->len, str->name);
-+ if (str->len == namelen && !memcmp(str->name, name, namelen))
-+ return 1;
-+ }
-+ return 0;
-+
-+}
-+
-+static int append_de(struct aufs_vdir *vdir, char *name, int namelen, ino_t ino,
-+ unsigned int d_type, struct aufs_nhash *delist)
-+{
-+ int err, sz;
-+ union aufs_deblk_p p, *room, deblk_end;
-+ struct aufs_dehstr *dehstr;
-+
-+ LKTRTrace("%.*s %d, i%lu, dt%u\n", namelen, name, namelen, ino, d_type);
-+
-+ p.deblk = last_deblk(vdir);
-+ deblk_end.deblk = p.deblk + 1;
-+ room = &vdir->vd_last.p;
-+ DEBUG_ON(room->p < p.p || deblk_end.p <= room->p
-+ || !is_deblk_end(room, &deblk_end));
-+
-+ sz = calc_size(namelen);
-+ if (unlikely(sz > deblk_end.p - room->p)) {
-+ err = append_deblk(vdir);
-+ if (unlikely(err))
-+ goto out;
-+ p.deblk = last_deblk(vdir);
-+ deblk_end.deblk = p.deblk + 1;
-+ //smp_mb();
-+ DEBUG_ON(room->p != p.p);
-+ }
-+
-+ err = -ENOMEM;
-+ dehstr = cache_alloc_dehstr();
-+ if (unlikely(!dehstr))
-+ goto out;
-+ dehstr->str = &room->de->de_str;
-+ hlist_add_head(&dehstr->hash,
-+ delist->heads + au_name_hash(name, namelen));
-+
-+ room->de->de_ino = ino;
-+ room->de->de_type = d_type;
-+ room->de->de_str.len = namelen;
-+ memcpy(room->de->de_str.name, name, namelen);
-+
-+ err = 0;
-+ room->p += sz;
-+ if (unlikely(set_deblk_end(room, &deblk_end)))
-+ err = append_deblk(vdir);
-+ //smp_mb();
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct fillvdir_arg {
-+ struct file *file;
-+ struct aufs_vdir *vdir;
-+ struct aufs_nhash *delist;
-+ struct aufs_nhash *whlist;
-+ aufs_bindex_t bindex;
-+ int err;
-+ int called;
-+};
-+
-+static int fillvdir(void *__arg, const char *__name, int namelen, loff_t offset,
-+ filldir_ino_t h_ino, unsigned int d_type)
-+{
-+ struct fillvdir_arg *arg = __arg;
-+ char *name = (void*)__name;
-+ aufs_bindex_t bindex, bend;
-+ struct xino xino;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, namelen %d, i%Lu, dt%u\n",
-+ namelen, name, namelen, (u64)h_ino, d_type);
-+
-+ sb = arg->file->f_dentry->d_sb;
-+ bend = arg->bindex;
-+ arg->err = 0;
-+ arg->called++;
-+ //smp_mb();
-+ if (namelen <= AUFS_WH_PFX_LEN
-+ || memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) {
-+ for (bindex = 0; bindex < bend; bindex++)
-+ if (test_known(arg->delist + bindex, name, namelen)
-+ || test_known_wh(arg->whlist + bindex, name,
-+ namelen))
-+ goto out; /* already exists or whiteouted */
-+
-+ arg->err = xino_read(sb, bend, h_ino, &xino);
-+ if (!arg->err && !xino.ino) {
-+ //struct inode *h_inode;
-+ xino.ino = xino_new_ino(sb);
-+ if (unlikely(!xino.ino))
-+ arg->err = -EIO;
-+#if 0
-+ //xino.h_gen = AuXino_INVALID_HGEN;
-+ h_inode = ilookup(sbr_sb(sb, bend), h_ino);
-+ if (h_inode) {
-+ if (!is_bad_inode(h_inode)) {
-+ xino.h_gen = h_inode->i_generation;
-+ WARN_ON(xino.h_gen == AuXino_INVALID_HGEN);
-+ }
-+ iput(h_inode);
-+ }
-+#endif
-+ arg->err = xino_write(sb, bend, h_ino, &xino);
-+ }
-+ if (!arg->err)
-+ arg->err = append_de(arg->vdir, name, namelen, xino.ino,
-+ d_type, arg->delist + bend);
-+ } else {
-+ name += AUFS_WH_PFX_LEN;
-+ namelen -= AUFS_WH_PFX_LEN;
-+ for (bindex = 0; bindex < bend; bindex++)
-+ if (test_known_wh(arg->whlist + bend, name, namelen))
-+ goto out; /* already whiteouted */
-+ arg->err = append_wh(arg->whlist + bend, name, namelen, bend);
-+ }
-+
-+ out:
-+ if (!arg->err)
-+ arg->vdir->vd_jiffy = jiffies;
-+ //smp_mb();
-+ TraceErr(arg->err);
-+ return arg->err;
-+}
-+
-+static int read_vdir(struct file *file, int may_read)
-+{
-+ int err, do_read, dlgt;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct aufs_vdir *vdir, *allocated;
-+ unsigned long expire;
-+ struct fillvdir_arg arg;
-+ aufs_bindex_t bindex, bend, bstart;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, may %d\n", DLNPair(dentry), may_read);
-+ FiMustWriteLock(file);
-+ inode = dentry->d_inode;
-+ IMustLock(inode);
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(!S_ISDIR(inode->i_mode));
-+
-+ err = 0;
-+ allocated = NULL;
-+ do_read = 0;
-+ sb = inode->i_sb;
-+ expire = stosi(sb)->si_rdcache;
-+ vdir = ivdir(inode);
-+ if (!vdir) {
-+ DEBUG_ON(fvdir_cache(file));
-+ do_read = 1;
-+ vdir = alloc_vdir();
-+ err = PTR_ERR(vdir);
-+ if (IS_ERR(vdir))
-+ goto out;
-+ err = 0;
-+ allocated = vdir;
-+ } else if (may_read
-+ && (inode->i_version != vdir->vd_version
-+ || time_after(jiffies, vdir->vd_jiffy + expire))) {
-+ LKTRTrace("iver %lu, vdver %lu, exp %lu\n",
-+ inode->i_version, vdir->vd_version,
-+ vdir->vd_jiffy + expire);
-+ do_read = 1;
-+ err = reinit_vdir(vdir);
-+ if (unlikely(err))
-+ goto out;
-+ }
-+ //DbgVdir(vdir); goto out;
-+
-+ if (!do_read)
-+ return 0; /* success */
-+
-+ err = -ENOMEM;
-+ bend = fbend(file);
-+ arg.delist = kmalloc(sizeof(*arg.delist) * (bend + 1), GFP_KERNEL);
-+ if (unlikely(!arg.delist))
-+ goto out_vdir;
-+ arg.whlist = kmalloc(sizeof(*arg.whlist) * (bend + 1), GFP_KERNEL);
-+ if (unlikely(!arg.whlist))
-+ goto out_delist;
-+ err = 0;
-+ for (bindex = 0; bindex <= bend; bindex++) {
-+ nhash_init(arg.delist + bindex);
-+ nhash_init(arg.whlist + bindex);
-+ }
-+
-+ dlgt = need_dlgt(sb);
-+ arg.file = file;
-+ arg.vdir = vdir;
-+ bstart = fbstart(file);
-+ for (bindex = bstart; !err && bindex <= bend; bindex++) {
-+ struct file *hf;
-+ struct inode *h_inode;
-+
-+ hf = au_h_fptr_i(file, bindex);
-+ if (!hf)
-+ continue;
-+
-+ h_inode = hf->f_dentry->d_inode;
-+ //hf->f_pos = 0;
-+ arg.bindex = bindex;
-+ do {
-+ arg.err = 0;
-+ arg.called = 0;
-+ //smp_mb();
-+ err = vfsub_readdir(hf, fillvdir, &arg, dlgt);
-+ if (err >= 0)
-+ err = arg.err;
-+ } while (!err && arg.called);
-+ }
-+
-+ for (bindex = bstart; bindex <= bend; bindex++) {
-+ free_dehlist(arg.delist + bindex);
-+ nhash_fin(arg.whlist + bindex);
-+ }
-+ kfree(arg.whlist);
-+
-+ out_delist:
-+ kfree(arg.delist);
-+ out_vdir:
-+ if (!err) {
-+ //file->f_pos = 0;
-+ vdir->vd_version = inode->i_version;
-+ vdir->vd_last.i = 0;
-+ vdir->vd_last.p.deblk = vdir->vd_deblk[0];
-+ if (allocated)
-+ set_ivdir(inode, allocated);
-+ } else if (allocated)
-+ free_vdir(allocated);
-+ //DbgVdir(vdir); goto out;
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int copy_vdir(struct aufs_vdir *tgt, struct aufs_vdir *src)
-+{
-+ int err, i, rerr, n;
-+
-+ TraceEnter();
-+ DEBUG_ON(tgt->vd_nblk != 1);
-+ //DbgVdir(tgt);
-+
-+ err = -ENOMEM;
-+ if (tgt->vd_nblk < src->vd_nblk) {
-+ aufs_deblk_t **p;
-+ p = au_kzrealloc(tgt->vd_deblk, sizeof(*p) * tgt->vd_nblk,
-+ sizeof(*p) * src->vd_nblk, GFP_KERNEL);
-+ if (unlikely(!p))
-+ goto out;
-+ tgt->vd_deblk = p;
-+ }
-+
-+ n = tgt->vd_nblk = src->vd_nblk;
-+ memcpy(tgt->vd_deblk[0], src->vd_deblk[0], AUFS_DEBLK_SIZE);
-+ //tgt->vd_last.i = 0;
-+ //tgt->vd_last.p.deblk = tgt->vd_deblk[0];
-+ tgt->vd_version = src->vd_version;
-+ tgt->vd_jiffy = src->vd_jiffy;
-+
-+ for (i = 1; i < n; i++) {
-+ tgt->vd_deblk[i] = kmalloc(AUFS_DEBLK_SIZE, GFP_KERNEL);
-+ if (tgt->vd_deblk[i])
-+ memcpy(tgt->vd_deblk[i], src->vd_deblk[i],
-+ AUFS_DEBLK_SIZE);
-+ else
-+ goto out;
-+ }
-+ //smp_mb();
-+ //DbgVdir(tgt);
-+ return 0; /* success */
-+
-+ out:
-+ rerr = reinit_vdir(tgt);
-+ BUG_ON(rerr);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+int au_init_vdir(struct file *file)
-+{
-+ int err;
-+ struct dentry *dentry;
-+ struct inode *inode;
-+ struct aufs_vdir *vdir_cache, *allocated;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld\n", DLNPair(dentry), file->f_pos);
-+ FiMustWriteLock(file);
-+ inode = dentry->d_inode;
-+ IiMustWriteLock(inode);
-+ DEBUG_ON(!S_ISDIR(inode->i_mode));
-+
-+ err = read_vdir(file, !file->f_pos);
-+ if (unlikely(err))
-+ goto out;
-+ //DbgVdir(ivdir(inode)); goto out;
-+
-+ allocated = NULL;
-+ vdir_cache = fvdir_cache(file);
-+ if (!vdir_cache) {
-+ vdir_cache = alloc_vdir();
-+ err = PTR_ERR(vdir_cache);
-+ if (IS_ERR(vdir_cache))
-+ goto out;
-+ allocated = vdir_cache;
-+ } else if (!file->f_pos && vdir_cache->vd_version != file->f_version) {
-+ err = reinit_vdir(vdir_cache);
-+ if (unlikely(err))
-+ goto out;
-+ } else
-+ return 0; /* success */
-+ //err = 0; DbgVdir(vdir_cache); goto out;
-+
-+ err = copy_vdir(vdir_cache, ivdir(inode));
-+ if (!err) {
-+ file->f_version = inode->i_version;
-+ if (allocated)
-+ set_fvdir_cache(file, allocated);
-+ } else if (allocated)
-+ free_vdir(allocated);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static loff_t calc_offset(struct aufs_vdir *vdir)
-+{
-+ loff_t offset;
-+ union aufs_deblk_p p;
-+
-+ p.deblk = vdir->vd_deblk[vdir->vd_last.i];
-+ offset = vdir->vd_last.p.p - p.p;
-+ offset += sizeof(*p.deblk) * vdir->vd_last.i;
-+ return offset;
-+}
-+
-+/* returns true or false */
-+static int seek_vdir(struct file *file)
-+{
-+ int valid, i, n;
-+ struct dentry *dentry;
-+ struct aufs_vdir *vdir_cache;
-+ loff_t offset;
-+ union aufs_deblk_p p, deblk_end;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld\n", DLNPair(dentry), file->f_pos);
-+ vdir_cache = fvdir_cache(file);
-+ DEBUG_ON(!vdir_cache);
-+ //DbgVdir(vdir_cache);
-+
-+ valid = 1;
-+ offset = calc_offset(vdir_cache);
-+ LKTRTrace("offset %Ld\n", offset);
-+ if (file->f_pos == offset)
-+ goto out;
-+
-+ vdir_cache->vd_last.i = 0;
-+ vdir_cache->vd_last.p.deblk = vdir_cache->vd_deblk[0];
-+ if (!file->f_pos)
-+ goto out;
-+
-+ valid = 0;
-+ i = file->f_pos / AUFS_DEBLK_SIZE;
-+ LKTRTrace("i %d\n", i);
-+ if (i >= vdir_cache->vd_nblk)
-+ goto out;
-+
-+ n = vdir_cache->vd_nblk;
-+ //DbgVdir(vdir_cache);
-+ for (; i < n; i++) {
-+ p.deblk = vdir_cache->vd_deblk[i];
-+ deblk_end.deblk = p.deblk + 1;
-+ offset = i * AUFS_DEBLK_SIZE;
-+ while (!is_deblk_end(&p, &deblk_end) && offset < file->f_pos) {
-+ int l;
-+ l = calc_size(p.de->de_str.len);
-+ offset += l;
-+ p.p += l;
-+ }
-+ if (!is_deblk_end(&p, &deblk_end)) {
-+ valid = 1;
-+ vdir_cache->vd_last.i = i;
-+ vdir_cache->vd_last.p = p;
-+ break;
-+ }
-+ }
-+
-+ out:
-+ //smp_mb();
-+ //DbgVdir(vdir_cache);
-+ TraceErr(!valid);
-+ return valid;
-+}
-+
-+int au_fill_de(struct file *file, void *dirent, filldir_t filldir)
-+{
-+ int err, l;
-+ struct dentry *dentry;
-+ struct aufs_vdir *vdir_cache;
-+ struct aufs_de *de;
-+ union aufs_deblk_p deblk_end;
-+
-+ dentry = file->f_dentry;
-+ LKTRTrace("%.*s, pos %Ld\n", DLNPair(dentry), file->f_pos);
-+ vdir_cache = fvdir_cache(file);
-+ DEBUG_ON(!vdir_cache);
-+ //DbgVdir(vdir_cache);
-+
-+ if (!seek_vdir(file))
-+ return 0;
-+
-+ while (1) {
-+ deblk_end.deblk
-+ = vdir_cache->vd_deblk[vdir_cache->vd_last.i] + 1;
-+ while (!is_deblk_end(&vdir_cache->vd_last.p, &deblk_end)) {
-+ de = vdir_cache->vd_last.p.de;
-+ LKTRTrace("%.*s, off%Ld, i%lu, dt%d\n",
-+ de->de_str.len, de->de_str.name,
-+ file->f_pos, de->de_ino, de->de_type);
-+ err = filldir(dirent, de->de_str.name, de->de_str.len,
-+ file->f_pos, de->de_ino, de->de_type);
-+ if (unlikely(err)) {
-+ TraceErr(err);
-+ //return err;
-+ //todo: ignore the error caused by udba.
-+ return 0;
-+ }
-+
-+ l = calc_size(de->de_str.len);
-+ vdir_cache->vd_last.p.p += l;
-+ file->f_pos += l;
-+ }
-+ if (vdir_cache->vd_last.i < vdir_cache->vd_nblk - 1) {
-+ vdir_cache->vd_last.i++;
-+ vdir_cache->vd_last.p.deblk
-+ = vdir_cache->vd_deblk[vdir_cache->vd_last.i];
-+ file->f_pos = sizeof(*vdir_cache->vd_last.p.deblk)
-+ * vdir_cache->vd_last.i;
-+ continue;
-+ }
-+ break;
-+ }
-+
-+ //smp_mb();
-+ return 0;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/vfsub.c linux-2.6.22.1/fs/aufs/vfsub.c
---- linux-2.6.22.1.oorig/fs/aufs/vfsub.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/vfsub.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,665 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: vfsub.c,v 1.5 2007/04/23 00:55:06 sfjro Exp $ */
-+// I'm going to slightly mad
-+
-+#include "aufs.h"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DLGT
-+struct permission_args {
-+ int *errp;
-+ struct inode *inode;
-+ int mask;
-+ struct nameidata *nd;
-+};
-+
-+static void call_permission(void *args)
-+{
-+ struct permission_args *a = args;
-+ *a->errp = do_vfsub_permission(a->inode, a->mask, a->nd);
-+}
-+
-+int vfsub_permission(struct inode *inode, int mask, struct nameidata *nd,
-+ int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_permission(inode, mask, nd);
-+ else {
-+ int err;
-+ struct permission_args args = {
-+ .errp = &err,
-+ .inode = inode,
-+ .mask = mask,
-+ .nd = nd
-+ };
-+ au_wkq_wait(call_permission, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct create_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+ int mode;
-+ struct nameidata *nd;
-+};
-+
-+static void call_create(void *args)
-+{
-+ struct create_args *a = args;
-+ *a->errp = do_vfsub_create(a->dir, a->dentry, a->mode, a->nd);
-+}
-+
-+int vfsub_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_create(dir, dentry, mode, nd);
-+ else {
-+ int err;
-+ struct create_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry,
-+ .mode = mode,
-+ .nd = nd
-+ };
-+ au_wkq_wait(call_create, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct symlink_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+ const char *symname;
-+ int mode;
-+};
-+
-+static void call_symlink(void *args)
-+{
-+ struct symlink_args *a = args;
-+ *a->errp = do_vfsub_symlink(a->dir, a->dentry, a->symname, a->mode);
-+}
-+
-+int vfsub_symlink(struct inode *dir, struct dentry *dentry, const char *symname,
-+ int mode, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_symlink(dir, dentry, symname, mode);
-+ else {
-+ int err;
-+ struct symlink_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry,
-+ .symname = symname,
-+ .mode = mode
-+ };
-+ au_wkq_wait(call_symlink, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct mknod_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+ int mode;
-+ dev_t dev;
-+};
-+
-+static void call_mknod(void *args)
-+{
-+ struct mknod_args *a = args;
-+ *a->errp = do_vfsub_mknod(a->dir, a->dentry, a->mode, a->dev);
-+}
-+
-+int vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev,
-+ int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_mknod(dir, dentry, mode, dev);
-+ else {
-+ int err;
-+ struct mknod_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry,
-+ .mode = mode,
-+ .dev = dev
-+ };
-+ au_wkq_wait(call_mknod, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct mkdir_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+ int mode;
-+};
-+
-+static void call_mkdir(void *args)
-+{
-+ struct mkdir_args *a = args;
-+ *a->errp = do_vfsub_mkdir(a->dir, a->dentry, a->mode);
-+}
-+
-+int vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_mkdir(dir, dentry, mode);
-+ else {
-+ int err;
-+ struct mkdir_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry,
-+ .mode = mode
-+ };
-+ au_wkq_wait(call_mkdir, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct link_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *src_dentry, *dentry;
-+};
-+
-+static void call_link(void *args)
-+{
-+ struct link_args *a = args;
-+ *a->errp = do_vfsub_link(a->src_dentry, a->dir, a->dentry);
-+}
-+
-+int vfsub_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_link(src_dentry, dir, dentry);
-+ else {
-+ int err;
-+ struct link_args args = {
-+ .errp = &err,
-+ .src_dentry = src_dentry,
-+ .dir = dir,
-+ .dentry = dentry
-+ };
-+ au_wkq_wait(call_link, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct rename_args {
-+ int *errp;
-+ struct inode *src_dir, *dir;
-+ struct dentry *src_dentry, *dentry;
-+};
-+
-+static void call_rename(void *args)
-+{
-+ struct rename_args *a = args;
-+ *a->errp = do_vfsub_rename(a->src_dir, a->src_dentry, a->dir,
-+ a->dentry);
-+}
-+
-+int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_rename(src_dir, src_dentry, dir, dentry);
-+ else {
-+ int err;
-+ struct rename_args args = {
-+ .errp = &err,
-+ .src_dir = src_dir,
-+ .src_dentry = src_dentry,
-+ .dir = dir,
-+ .dentry = dentry
-+ };
-+ au_wkq_wait(call_rename, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct rmdir_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+};
-+
-+static void call_rmdir(void *args)
-+{
-+ struct rmdir_args *a = args;
-+ *a->errp = do_vfsub_rmdir(a->dir, a->dentry);
-+}
-+
-+int vfsub_rmdir(struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_rmdir(dir, dentry);
-+ else {
-+ int err;
-+ struct rmdir_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry
-+ };
-+ au_wkq_wait(call_rmdir, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct read_args {
-+ ssize_t *errp;
-+ struct file *file;
-+ union {
-+ void *kbuf;
-+ char __user *ubuf;
-+ };
-+ size_t count;
-+ loff_t *ppos;
-+};
-+
-+static void call_read_k(void *args)
-+{
-+ struct read_args *a = args;
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(a->file->f_dentry), (unsigned long)a->count,
-+ *a->ppos);
-+ *a->errp = do_vfsub_read_k(a->file, a->kbuf, a->count, a->ppos);
-+}
-+
-+ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_read_u(file, ubuf, count, ppos);
-+ else {
-+ ssize_t err, read;
-+ struct read_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .count = count,
-+ .ppos = ppos
-+ };
-+
-+ if (unlikely(!count))
-+ return 0;
-+
-+ /*
-+ * workaround an application bug.
-+ * generally, read(2) or write(2) may return the value shorter
-+ * than requested. But many applications don't support it,
-+ * for example bash.
-+ */
-+ err = -ENOMEM;
-+ if (args.count > PAGE_SIZE)
-+ args.count = PAGE_SIZE;
-+ args.kbuf = kmalloc(args.count, GFP_KERNEL);
-+ if (unlikely(!args.kbuf))
-+ goto out;
-+
-+ read = 0;
-+ do {
-+ au_wkq_wait(call_read_k, &args, /*dlgt*/1);
-+ if (unlikely(err > 0
-+ && copy_to_user(ubuf, args.kbuf, err))) {
-+ err = -EFAULT;
-+ goto out_free;
-+ } else if (!err)
-+ break;
-+ else if (unlikely(err < 0))
-+ goto out_free;
-+ count -= err;
-+ /* do not read too much because of file i/o pointer */
-+ if (unlikely(count < args.count))
-+ args.count = count;
-+ ubuf += err;
-+ read += err;
-+ } while (count);
-+ smp_mb();
-+ err = read;
-+
-+ out_free:
-+ kfree(args.kbuf);
-+ out:
-+ return err;
-+ }
-+}
-+
-+ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_read_k(file, kbuf, count, ppos);
-+ else {
-+ ssize_t err;
-+ struct read_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .count = count,
-+ .ppos = ppos
-+ };
-+ args.kbuf = kbuf;
-+ au_wkq_wait(call_read_k, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct write_args {
-+ ssize_t *errp;
-+ struct file *file;
-+ union {
-+ void *kbuf;
-+ const char __user *ubuf;
-+ };
-+ void *buf;
-+ size_t count;
-+ loff_t *ppos;
-+};
-+
-+static void call_write_k(void *args)
-+{
-+ struct write_args *a = args;
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(a->file->f_dentry), (unsigned long)a->count,
-+ *a->ppos);
-+ *a->errp = do_vfsub_write_k(a->file, a->kbuf, a->count, a->ppos);
-+}
-+
-+ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_write_u(file, ubuf, count, ppos);
-+ else {
-+ ssize_t err, written;
-+ struct write_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .count = count,
-+ .ppos = ppos
-+ };
-+
-+ if (unlikely(!count))
-+ return 0;
-+
-+ /*
-+ * workaround an application bug.
-+ * generally, read(2) or write(2) may return the value shorter
-+ * than requested. But many applications don't support it,
-+ * for example bash.
-+ */
-+ err = -ENOMEM;
-+ if (args.count > PAGE_SIZE)
-+ args.count = PAGE_SIZE;
-+ args.kbuf = kmalloc(args.count, GFP_KERNEL);
-+ if (unlikely(!args.kbuf))
-+ goto out;
-+
-+ written = 0;
-+ do {
-+ if (unlikely(copy_from_user(args.kbuf, ubuf, args.count))) {
-+ err = -EFAULT;
-+ goto out_free;
-+ }
-+
-+ au_wkq_wait(call_write_k, &args, /*dlgt*/1);
-+ if (err > 0) {
-+ count -= err;
-+ if (count < args.count)
-+ args.count = count;
-+ ubuf += err;
-+ written += err;
-+ } else if (!err)
-+ break;
-+ else if (unlikely(err < 0))
-+ goto out_free;
-+ } while (count);
-+ err = written;
-+
-+ out_free:
-+ kfree(args.kbuf);
-+ out:
-+ return err;
-+ }
-+}
-+
-+ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_write_k(file, kbuf, count, ppos);
-+ else {
-+ ssize_t err;
-+ struct write_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .count = count,
-+ .ppos = ppos
-+ };
-+ args.kbuf = kbuf;
-+ au_wkq_wait(call_write_k, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+
-+struct readdir_args {
-+ int *errp;
-+ struct file *file;
-+ filldir_t filldir;
-+ void *arg;
-+};
-+
-+static void call_readdir(void *args)
-+{
-+ struct readdir_args *a = args;
-+ *a->errp = do_vfsub_readdir(a->file, a->filldir, a->arg);
-+}
-+
-+int vfsub_readdir(struct file *file, filldir_t filldir, void *arg, int dlgt)
-+{
-+ if (!dlgt)
-+ return do_vfsub_readdir(file, filldir, arg);
-+ else {
-+ int err;
-+ struct readdir_args args = {
-+ .errp = &err,
-+ .file = file,
-+ .filldir = filldir,
-+ .arg = arg
-+ };
-+ au_wkq_wait(call_readdir, &args, /*dlgt*/1);
-+ return err;
-+ }
-+}
-+#endif /* CONFIG_AUFS_DLGT */
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct notify_change_args {
-+ int *errp;
-+ struct dentry *h_dentry;
-+ struct iattr *ia;
-+};
-+
-+static void call_notify_change(void *args)
-+{
-+ struct notify_change_args *a = args;
-+ struct inode *h_inode;
-+
-+ LKTRTrace("%.*s, ia_valid 0x%x\n",
-+ DLNPair(a->h_dentry), a->ia->ia_valid);
-+ h_inode = a->h_dentry->d_inode;
-+ IMustLock(h_inode);
-+
-+ *a->errp = -EPERM;
-+ if (!IS_IMMUTABLE(h_inode) && !IS_APPEND(h_inode)) {
-+ lockdep_off();
-+ *a->errp = notify_change(a->h_dentry, a->ia);
-+ lockdep_on();
-+ }
-+ TraceErr(*a->errp);
-+}
-+
-+int vfsub_notify_change(struct dentry *dentry, struct iattr *ia, int dlgt)
-+{
-+ int err;
-+ struct notify_change_args args = {
-+ .errp = &err,
-+ .h_dentry = dentry,
-+ .ia = ia
-+ };
-+
-+#ifndef CONFIG_AUFS_DLGT
-+ call_notify_change(&args);
-+#else
-+ if (!dlgt)
-+ call_notify_change(&args);
-+ else
-+ au_wkq_wait(call_notify_change, &args, /*dlgt*/1);
-+#endif
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct unlink_args {
-+ int *errp;
-+ struct inode *dir;
-+ struct dentry *dentry;
-+};
-+
-+static void call_unlink(void *args)
-+{
-+ struct unlink_args *a = args;
-+ struct inode *h_inode;
-+ const int stop_sillyrename = (au_is_nfs(a->dentry->d_sb)
-+ && atomic_read(&a->dentry->d_count) == 1);
-+
-+ LKTRTrace("%.*s, stop_silly %d, cnt %d\n",
-+ DLNPair(a->dentry), stop_sillyrename,
-+ atomic_read(&a->dentry->d_count));
-+ IMustLock(a->dir);
-+
-+ if (!stop_sillyrename)
-+ dget(a->dentry);
-+ h_inode = a->dentry->d_inode;
-+ if (h_inode)
-+ atomic_inc(&h_inode->i_count);
-+#if 0 // partial testing
-+ {
-+ struct qstr *name = &a->dentry->d_name;
-+ if (name->len == sizeof(AUFS_XINO_FNAME) - 1
-+ && !strncmp(name->name, AUFS_XINO_FNAME, name->len)) {
-+ lockdep_off();
-+ *a->errp = vfs_unlink(a->dir, a->dentry);
-+ lockdep_on();
-+ } else
-+ err = -1;
-+ }
-+#else
-+ // vfs_unlink() locks inode
-+ lockdep_off();
-+ *a->errp = vfs_unlink(a->dir, a->dentry);
-+ lockdep_on();
-+#endif
-+
-+ if (!stop_sillyrename)
-+ dput(a->dentry);
-+ if (h_inode)
-+ iput(h_inode);
-+
-+ TraceErr(*a->errp);
-+}
-+
-+/*
-+ * @dir: must be locked.
-+ * @dentry: target dentry.
-+ */
-+int vfsub_unlink(struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ int err;
-+ struct unlink_args args = {
-+ .errp = &err,
-+ .dir = dir,
-+ .dentry = dentry
-+ };
-+
-+#ifndef CONFIG_AUFS_DLGT
-+ call_unlink(&args);
-+#else
-+ if (!dlgt)
-+ call_unlink(&args);
-+ else
-+ au_wkq_wait(call_unlink, &args, /*dlgt*/1);
-+#endif
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct statfs_args {
-+ int *errp;
-+ void *arg;
-+ struct kstatfs *buf;
-+};
-+
-+static void call_statfs(void *args)
-+{
-+ struct statfs_args *a = args;
-+ *a->errp = vfs_statfs(a->arg, a->buf);
-+}
-+
-+int vfsub_statfs(void *arg, struct kstatfs *buf, int dlgt)
-+{
-+ int err;
-+ struct statfs_args args = {
-+ .errp = &err,
-+ .arg = arg,
-+ .buf = buf
-+ };
-+
-+#ifndef CONFIG_AUFS_DLGT
-+ call_statfs(&args);
-+#else
-+ if (!dlgt)
-+ call_statfs(&args);
-+ else
-+ au_wkq_wait(call_statfs, &args, /*dlgt*/1);
-+#endif
-+ return err;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/vfsub.h linux-2.6.22.1/fs/aufs/vfsub.h
---- linux-2.6.22.1.oorig/fs/aufs/vfsub.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/vfsub.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,427 @@
-+/*
-+ * Copyright (C) 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: vfsub.h,v 1.8 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+#ifndef __AUFS_VFSUB_H__
-+#define __AUFS_VFSUB_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <asm/uaccess.h>
-+#include "wkq.h"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* simple abstractions, for future use */
-+static inline
-+int do_vfsub_permission(struct inode *inode, int mask, struct nameidata *nd)
-+{
-+ LKTRTrace("i%lu, mask 0x%x, nd %p\n", inode->i_ino, mask, nd);
-+#if 0
-+#else
-+ return permission(inode, mask, nd);
-+#endif
-+}
-+
-+static inline
-+struct file *vfsub_filp_open(const char *path, int oflags, int mode)
-+{
-+ struct file *err;
-+
-+ LKTRTrace("%s\n", path);
-+
-+ lockdep_off();
-+ err = filp_open(path, oflags, mode);
-+ lockdep_on();
-+ return err;
-+}
-+
-+static inline
-+int vfsub_path_lookup(const char *name, unsigned int flags,
-+ struct nameidata *nd)
-+{
-+ int err;
-+
-+ LKTRTrace("%s\n", name);
-+
-+ //lockdep_off();
-+ err = path_lookup(name, flags, nd);
-+ //lockdep_on();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+int do_vfsub_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd)
-+{
-+ LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, DLNPair(dentry), mode);
-+#if 0
-+#else
-+ return vfs_create(dir, dentry, mode, nd);
-+#endif
-+}
-+
-+static inline
-+int do_vfsub_symlink(struct inode *dir, struct dentry *dentry,
-+ const char *symname, int mode)
-+{
-+ LKTRTrace("i%lu, %.*s, %s, 0x%x\n",
-+ dir->i_ino, DLNPair(dentry), symname, mode);
-+#if 0
-+#else
-+ return vfs_symlink(dir, dentry, symname, mode);
-+#endif
-+}
-+
-+static inline
-+int do_vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+ dev_t dev)
-+{
-+ LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, DLNPair(dentry), mode);
-+#if 0
-+#else
-+ return vfs_mknod(dir, dentry, mode, dev);
-+#endif
-+}
-+
-+static inline
-+int do_vfsub_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry)
-+{
-+ int err;
-+
-+ LKTRTrace("%.*s, i%lu, %.*s\n",
-+ DLNPair(src_dentry), dir->i_ino, DLNPair(dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_link(src_dentry, dir, dentry);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+static inline
-+int do_vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry)
-+{
-+ int err;
-+
-+ LKTRTrace("i%lu, %.*s, i%lu, %.*s\n",
-+ src_dir->i_ino, DLNPair(src_dentry),
-+ dir->i_ino, DLNPair(dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_rename(src_dir, src_dentry, dir, dentry);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+static inline
-+int do_vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-+{
-+ LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, DLNPair(dentry), mode);
-+#if 0
-+#else
-+ return vfs_mkdir(dir, dentry, mode);
-+#endif
-+}
-+
-+static inline int do_vfsub_rmdir(struct inode *dir, struct dentry *dentry)
-+{
-+ int err;
-+
-+ LKTRTrace("i%lu, %.*s\n", dir->i_ino, DLNPair(dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_rmdir(dir, dentry);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+ssize_t do_vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
-+ loff_t *ppos)
-+{
-+ ssize_t err;
-+
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(file->f_dentry), (unsigned long)count, *ppos);
-+
-+ /* nfs uses some locks */
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_read(file, ubuf, count, ppos);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+// kernel_read() ??
-+static inline
-+ssize_t do_vfsub_read_k(struct file *file, void *kbuf, size_t count,
-+ loff_t *ppos)
-+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = do_vfsub_read_u(file, (char __user*)kbuf, count, ppos);
-+ set_fs(oldfs);
-+ return err;
-+}
-+
-+static inline
-+ssize_t do_vfsub_write_u(struct file *file, const char __user *ubuf,
-+ size_t count, loff_t *ppos)
-+{
-+ ssize_t err;
-+
-+ LKTRTrace("%.*s, cnt %lu, pos %Ld\n",
-+ DLNPair(file->f_dentry), (unsigned long)count, *ppos);
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_write(file, ubuf, count, ppos);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+static inline
-+ssize_t do_vfsub_write_k(struct file *file, void *kbuf, size_t count,
-+ loff_t *ppos)
-+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = do_vfsub_write_u(file, (const char __user*)kbuf, count, ppos);
-+ set_fs(oldfs);
-+ return err;
-+}
-+
-+static inline
-+int do_vfsub_readdir(struct file *file, filldir_t filldir, void *arg)
-+{
-+ int err;
-+
-+ LKTRTrace("%.*s\n", DLNPair(file->f_dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_readdir(file, filldir, arg);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline loff_t vfsub_llseek(struct file *file, loff_t offset, int origin)
-+{
-+ loff_t err;
-+
-+ LKTRTrace("%.*s\n", DLNPair(file->f_dentry));
-+
-+ lockdep_off();
-+#if 0
-+#else
-+ err = vfs_llseek(file, offset, origin);
-+#endif
-+ lockdep_on();
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DLGT
-+static inline int need_dlgt(struct super_block *sb)
-+{
-+ return (au_flag_test(sb, AuFlag_DLGT) && !is_au_wkq(current));
-+}
-+
-+int vfsub_permission(struct inode *inode, int mask, struct nameidata *nd,
-+ int dlgt);
-+
-+int vfsub_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd, int dlgt);
-+int vfsub_symlink(struct inode *dir, struct dentry *dentry, const char *symname,
-+ int mode, int dlgt);
-+int vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev,
-+ int dlgt);
-+int vfsub_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry, int dlgt);
-+int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry, int dlgt);
-+int vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode, int dlgt);
-+int vfsub_rmdir(struct inode *dir, struct dentry *dentry, int dlgt);
-+
-+ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt);
-+ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt);
-+ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt);
-+ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt);
-+int vfsub_readdir(struct file *file, filldir_t filldir, void *arg, int dlgt);
-+
-+#else
-+
-+static inline int need_dlgt(struct super_block *sb)
-+{
-+ return 0;
-+}
-+
-+static inline
-+int vfsub_permission(struct inode *inode, int mask, struct nameidata *nd,
-+ int dlgt)
-+{
-+ return do_vfsub_permission(inode, mask, nd);
-+}
-+
-+static inline
-+int vfsub_create(struct inode *dir, struct dentry *dentry, int mode,
-+ struct nameidata *nd, int dlgt)
-+{
-+ return do_vfsub_create(dir, dentry, mode, nd);
-+}
-+
-+static inline
-+int vfsub_symlink(struct inode *dir, struct dentry *dentry, const char *symname,
-+ int mode, int dlgt)
-+{
-+ return do_vfsub_symlink(dir, dentry, symname, mode);
-+}
-+
-+static inline
-+int vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev,
-+ int dlgt)
-+{
-+ return do_vfsub_mknod(dir, dentry, mode, dev);
-+}
-+
-+static inline
-+int vfsub_link(struct dentry *src_dentry, struct inode *dir,
-+ struct dentry *dentry, int dlgt)
-+{
-+ return do_vfsub_link(src_dentry, dir, dentry);
-+}
-+
-+static inline
-+int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ return do_vfsub_rename(src_dir, src_dentry, dir, dentry);
-+}
-+
-+static inline
-+int vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode,
-+ int dlgt)
-+{
-+ return do_vfsub_mkdir(dir, dentry, mode);
-+}
-+
-+static inline
-+int vfsub_rmdir(struct inode *dir, struct dentry *dentry, int dlgt)
-+{
-+ return do_vfsub_rmdir(dir, dentry);
-+}
-+
-+static inline
-+ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt)
-+{
-+ return do_vfsub_read_u(file, ubuf, count, ppos);
-+}
-+
-+static inline
-+ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt)
-+{
-+ return do_vfsub_read_k(file, kbuf, count, ppos);
-+}
-+
-+static inline
-+ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count,
-+ loff_t *ppos, int dlgt)
-+{
-+ return do_vfsub_write_u(file, ubuf, count, ppos);
-+}
-+
-+static inline
-+ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos,
-+ int dlgt)
-+{
-+ return do_vfsub_write_k(file, kbuf, count, ppos);
-+}
-+
-+static inline
-+int vfsub_readdir(struct file *file, filldir_t filldir, void *arg, int dlgt)
-+{
-+ return do_vfsub_readdir(file, filldir, arg);
-+}
-+#endif /* CONFIG_AUFS_DLGT */
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+struct dentry *vfsub_lock_rename(struct dentry *d1, struct dentry *d2)
-+{
-+ struct dentry *d;
-+
-+ lockdep_off();
-+ d = lock_rename(d1, d2);
-+ lockdep_on();
-+ return d;
-+}
-+
-+static inline void vfsub_unlock_rename(struct dentry *d1, struct dentry *d2)
-+{
-+ lockdep_off();
-+ unlock_rename(d1, d2);
-+ lockdep_on();
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int vfsub_notify_change(struct dentry *dentry, struct iattr *ia, int dlgt);
-+int vfsub_unlink(struct inode *dir, struct dentry *dentry, int dlgt);
-+int vfsub_statfs(void *arg, struct kstatfs *buf, int dlgt);
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_VFSUB_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/whout.c linux-2.6.22.1/fs/aufs/whout.c
---- linux-2.6.22.1.oorig/fs/aufs/whout.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/whout.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,933 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: whout.c,v 1.14 2007/05/14 03:40:40 sfjro Exp $ */
-+
-+#include <linux/fs.h>
-+#include <linux/namei.h>
-+#include <linux/random.h>
-+#include <linux/security.h>
-+#include "aufs.h"
-+
-+#define WH_MASK S_IRUGO
-+
-+/* If a directory contains this file, then it is opaque. We start with the
-+ * .wh. flag so that it is blocked by lookup.
-+ */
-+static struct qstr diropq_name = {
-+ .name = AUFS_WH_DIROPQ,
-+ .len = sizeof(AUFS_WH_DIROPQ) - 1
-+};
-+
-+/*
-+ * generate whiteout name, which is NOT terminated by NULL.
-+ * @name: original d_name.name
-+ * @len: original d_name.len
-+ * @wh: whiteout qstr
-+ * returns zero when succeeds, otherwise error.
-+ * succeeded value as wh->name should be freed by au_free_whname().
-+ */
-+int au_alloc_whname(const char *name, int len, struct qstr *wh)
-+{
-+ char *p;
-+
-+ DEBUG_ON(!name || !len || !wh);
-+
-+ if (unlikely(len > PATH_MAX - AUFS_WH_PFX_LEN))
-+ return -ENAMETOOLONG;
-+
-+ wh->len = len + AUFS_WH_PFX_LEN;
-+ wh->name = p = kmalloc(wh->len, GFP_KERNEL);
-+ //if (LktrCond) {kfree(p); wh->name = p = NULL;}
-+ if (p) {
-+ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN);
-+ memcpy(p + AUFS_WH_PFX_LEN, name, len);
-+ //smp_mb();
-+ return 0;
-+ }
-+ return -ENOMEM;
-+}
-+
-+void au_free_whname(struct qstr *wh)
-+{
-+ DEBUG_ON(!wh || !wh->name);
-+ kfree(wh->name);
-+#ifdef CONFIG_AUFS_DEBUG
-+ wh->name = NULL;
-+#endif
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * test if the @wh_name exists under @hidden_parent.
-+ * @try_sio specifies the necessary of super-io.
-+ */
-+int is_wh(struct dentry *hidden_parent, struct qstr *wh_name, int try_sio,
-+ struct lkup_args *lkup)
-+{
-+ int err;
-+ struct dentry *wh_dentry;
-+ struct inode *hidden_dir;
-+
-+ LKTRTrace("%.*s/%.*s, lkup{%p, %d}\n", DLNPair(hidden_parent),
-+ wh_name->len, wh_name->name, lkup->nfsmnt, lkup->dlgt);
-+ hidden_dir = hidden_parent->d_inode;
-+ DEBUG_ON(!S_ISDIR(hidden_dir->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ if (!try_sio)
-+ wh_dentry = lkup_one(wh_name->name, hidden_parent,
-+ wh_name->len, lkup);
-+ else
-+ wh_dentry = sio_lkup_one(wh_name->name, hidden_parent,
-+ wh_name->len, lkup);
-+ //if (LktrCond) {dput(wh_dentry); wh_dentry = ERR_PTR(-1);}
-+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
-+ goto out;
-+
-+ err = 0;
-+ if (!wh_dentry->d_inode)
-+ goto out_wh; /* success */
-+
-+ err = 1;
-+ if (S_ISREG(wh_dentry->d_inode->i_mode))
-+ goto out_wh; /* success */
-+
-+ err = -EIO;
-+ IOErr("%.*s Invalid whiteout entry type 0%o.\n",
-+ DLNPair(wh_dentry), wh_dentry->d_inode->i_mode);
-+
-+ out_wh:
-+ dput(wh_dentry);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * test if the @hidden_dentry sets opaque or not.
-+ */
-+int is_diropq(struct dentry *hidden_dentry, struct lkup_args *lkup)
-+{
-+ int err;
-+ struct inode *hidden_dir;
-+
-+ LKTRTrace("dentry %.*s\n", DLNPair(hidden_dentry));
-+ hidden_dir = hidden_dentry->d_inode;
-+ DEBUG_ON(!S_ISDIR(hidden_dir->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ err = is_wh(hidden_dentry, &diropq_name, /*try_sio*/1, lkup);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * returns a negative dentry whose name is unique and temporary.
-+ */
-+struct dentry *lkup_whtmp(struct dentry *hidden_parent, struct qstr *prefix,
-+ struct lkup_args *lkup)
-+{
-+#define HEX_LEN 4
-+ struct dentry *dentry;
-+ int len, i;
-+ char defname[AUFS_WH_PFX_LEN * 2 + DNAME_INLINE_LEN_MIN + 1
-+ + HEX_LEN + 1], *name, *p;
-+ static unsigned char cnt;
-+
-+ LKTRTrace("hp %.*s, prefix %.*s\n",
-+ DLNPair(hidden_parent), prefix->len, prefix->name);
-+ DEBUG_ON(!hidden_parent->d_inode);
-+ IMustLock(hidden_parent->d_inode);
-+
-+ name = defname;
-+ len = sizeof(defname) - DNAME_INLINE_LEN_MIN + prefix->len - 1;
-+ if (unlikely(prefix->len > DNAME_INLINE_LEN_MIN)) {
-+ dentry = ERR_PTR(-ENAMETOOLONG);
-+ if (unlikely(len >= PATH_MAX))
-+ goto out;
-+ dentry = ERR_PTR(-ENOMEM);
-+ name = kmalloc(len + 1, GFP_KERNEL);
-+ //if (LktrCond) {kfree(name); name = NULL;}
-+ if (unlikely(!name))
-+ goto out;
-+ }
-+
-+ // doubly whiteout-ed
-+ memcpy(name, AUFS_WH_PFX AUFS_WH_PFX, AUFS_WH_PFX_LEN * 2);
-+ p = name + AUFS_WH_PFX_LEN * 2;
-+ memcpy(p, prefix->name, prefix->len);
-+ p += prefix->len;
-+ *p++ = '.';
-+ DEBUG_ON(name + len + 1 - p <= HEX_LEN);
-+
-+ for (i = 0; i < 3; i++) {
-+ sprintf(p, "%.*d", HEX_LEN, cnt++);
-+ dentry = sio_lkup_one(name, hidden_parent, len, lkup);
-+ //if (LktrCond) {dput(dentry); dentry = ERR_PTR(-1);}
-+ if (unlikely(IS_ERR(dentry) || !dentry->d_inode))
-+ goto out_name;
-+ dput(dentry);
-+ }
-+ //Warn("could not get random name\n");
-+ dentry = ERR_PTR(-EEXIST);
-+ Dbg("%.*s\n", len, name);
-+ BUG();
-+
-+ out_name:
-+ if (unlikely(name != defname))
-+ kfree(name);
-+ out:
-+ TraceErrPtr(dentry);
-+ return dentry;
-+#undef HEX_LEN
-+}
-+
-+/*
-+ * rename the @dentry of @bindex to the whiteouted temporary name.
-+ */
-+int rename_whtmp(struct dentry *dentry, aufs_bindex_t bindex)
-+{
-+ int err;
-+ struct inode *hidden_dir;
-+ struct dentry *hidden_dentry, *hidden_parent, *tmp_dentry;
-+ struct super_block *sb;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, b%d\n", DLNPair(dentry), bindex);
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ DEBUG_ON(!hidden_dentry || !hidden_dentry->d_inode);
-+ hidden_parent = hidden_dentry->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ sb = dentry->d_sb;
-+ lkup.nfsmnt = au_nfsmnt(sb, bindex);
-+ lkup.dlgt = need_dlgt(sb);
-+ tmp_dentry = lkup_whtmp(hidden_parent, &hidden_dentry->d_name, &lkup);
-+ //if (LktrCond) {dput(tmp_dentry); tmp_dentry = ERR_PTR(-1);}
-+ err = PTR_ERR(tmp_dentry);
-+ if (!IS_ERR(tmp_dentry)) {
-+ /* under the same dir, no need to lock_rename() */
-+ err = vfsub_rename(hidden_dir, hidden_dentry,
-+ hidden_dir, tmp_dentry, lkup.dlgt);
-+ //if (LktrCond) err = -1; //unavailable
-+ TraceErr(err);
-+ dput(tmp_dentry);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+int au_unlink_wh_dentry(struct inode *hidden_dir, struct dentry *wh_dentry,
-+ struct dentry *dentry, int dlgt)
-+{
-+ int err;
-+
-+ LKTRTrace("hi%lu, wh %.*s, d %p\n", hidden_dir->i_ino,
-+ DLNPair(wh_dentry), dentry);
-+ DEBUG_ON((dentry && dbwh(dentry) == -1)
-+ || !wh_dentry->d_inode
-+ || !S_ISREG(wh_dentry->d_inode->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ err = vfsub_unlink(hidden_dir, wh_dentry, dlgt);
-+ //if (LktrCond) err = -1; // unavailable
-+ if (!err && dentry)
-+ set_dbwh(dentry, -1);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+static int unlink_wh_name(struct dentry *hidden_parent, struct qstr *wh,
-+ struct lkup_args *lkup)
-+{
-+ int err;
-+ struct inode *hidden_dir;
-+ struct dentry *hidden_dentry;
-+
-+ LKTRTrace("%.*s/%.*s\n", DLNPair(hidden_parent), LNPair(wh));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ // au_test_perm() is already done
-+ hidden_dentry = lkup_one(wh->name, hidden_parent, wh->len, lkup);
-+ //if (LktrCond) {dput(hidden_dentry); hidden_dentry = ERR_PTR(-1);}
-+ if (!IS_ERR(hidden_dentry)) {
-+ err = 0;
-+ if (hidden_dentry->d_inode)
-+ err = vfsub_unlink(hidden_dir, hidden_dentry,
-+ lkup->dlgt);
-+ dput(hidden_dentry);
-+ } else
-+ err = PTR_ERR(hidden_dentry);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void clean_wh(struct inode *h_dir, struct dentry *wh)
-+{
-+ TraceEnter();
-+ if (wh->d_inode) {
-+ int err = vfsub_unlink(h_dir, wh, /*dlgt*/0);
-+ if (unlikely(err))
-+ Warn("failed unlink %.*s (%d), ignored.\n",
-+ DLNPair(wh), err);
-+ }
-+}
-+
-+static void clean_plink(struct inode *h_dir, struct dentry *plink)
-+{
-+ TraceEnter();
-+ if (plink->d_inode) {
-+ int err = vfsub_rmdir(h_dir, plink, /*dlgt*/0);
-+ if (unlikely(err))
-+ Warn("failed rmdir %.*s (%d), ignored.\n",
-+ DLNPair(plink), err);
-+ }
-+}
-+
-+static int test_linkable(struct inode *h_dir)
-+{
-+ if (h_dir->i_op && h_dir->i_op->link)
-+ return 0;
-+ return -ENOSYS;
-+}
-+
-+static int plink_dir(struct inode *h_dir, struct dentry *plink)
-+{
-+ int err;
-+
-+ err = -EEXIST;
-+ if (!plink->d_inode) {
-+ int mode = S_IRWXU;
-+ if (unlikely(au_is_nfs(plink->d_sb)))
-+ mode |= S_IXUGO;
-+ err = vfsub_mkdir(h_dir, plink, mode, /*dlgt*/0);
-+ } else if (S_ISDIR(plink->d_inode->i_mode))
-+ err = 0;
-+ else
-+ Err("unknown %.*s exists\n", DLNPair(plink));
-+
-+ return err;
-+}
-+
-+/*
-+ * initialize the whiteout base file/dir for @br.
-+ */
-+int init_wh(struct dentry *h_root, struct aufs_branch *br,
-+ struct vfsmount *nfsmnt, struct super_block *sb)
-+{
-+ int err;
-+ struct dentry *wh, *plink;
-+ struct inode *h_dir;
-+ static struct qstr base_name[] = {
-+ {.name = AUFS_WH_BASENAME, .len = sizeof(AUFS_WH_BASENAME) - 1},
-+ {.name = AUFS_WH_PLINKDIR, .len = sizeof(AUFS_WH_PLINKDIR) - 1}
-+ };
-+ struct lkup_args lkup = {
-+ .nfsmnt = nfsmnt,
-+ .dlgt = 0 // always no dlgt
-+ };
-+ const int do_plink = au_flag_test(sb, AuFlag_PLINK);
-+
-+ LKTRTrace("nfsmnt %p\n", nfsmnt);
-+ BrWhMustWriteLock(br);
-+ SiMustWriteLock(sb);
-+ h_dir = h_root->d_inode;
-+ IMustLock(h_dir);
-+
-+ // doubly whiteouted
-+ wh = lkup_wh(h_root, base_name + 0, &lkup);
-+ //if (LktrCond) {dput(wh); wh = ERR_PTR(-1);}
-+ err = PTR_ERR(wh);
-+ if (IS_ERR(wh))
-+ goto out;
-+ DEBUG_ON(br->br_wh && br->br_wh != wh);
-+
-+ plink = lkup_wh(h_root, base_name + 1, &lkup);
-+ err = PTR_ERR(plink);
-+ if (IS_ERR(plink))
-+ goto out_dput_wh;
-+ DEBUG_ON(br->br_plink && br->br_plink != plink);
-+
-+ dput(br->br_wh);
-+ dput(br->br_plink);
-+ br->br_wh = br->br_plink = NULL;
-+
-+ err = 0;
-+ switch (br->br_perm) {
-+ case AuBr_RR:
-+ case AuBr_RO:
-+ case AuBr_RRWH:
-+ case AuBr_ROWH:
-+ clean_wh(h_dir, wh);
-+ clean_plink(h_dir, plink);
-+ break;
-+
-+ case AuBr_RWNoLinkWH:
-+ clean_wh(h_dir, wh);
-+ if (do_plink) {
-+ err = test_linkable(h_dir);
-+ if (unlikely(err))
-+ goto out_nolink;
-+
-+ err = plink_dir(h_dir, plink);
-+ if (unlikely(err))
-+ goto out_err;
-+ br->br_plink = dget(plink);
-+ } else
-+ clean_plink(h_dir, plink);
-+ break;
-+
-+ case AuBr_RW:
-+ /*
-+ * for the moment, aufs supports the branch filesystem
-+ * which does not support link(2).
-+ * testing on FAT which does not support i_op->setattr() fully either,
-+ * copyup failed.
-+ * finally, such filesystem will not be used as the writable branch.
-+ */
-+ err = test_linkable(h_dir);
-+ if (unlikely(err))
-+ goto out_nolink;
-+
-+ err = -EEXIST;
-+ if (!wh->d_inode)
-+ err = vfsub_create(h_dir, wh, WH_MASK, NULL, /*dlgt*/0);
-+ else if (S_ISREG(wh->d_inode->i_mode))
-+ err = 0;
-+ else
-+ Err("unknown %.*s/%.*s exists\n",
-+ DLNPair(h_root), DLNPair(wh));
-+ if (unlikely(err))
-+ goto out_err;
-+
-+ if (do_plink) {
-+ err = plink_dir(h_dir, plink);
-+ if (unlikely(err))
-+ goto out_err;
-+ br->br_plink = dget(plink);
-+ } else
-+ clean_plink(h_dir, plink);
-+ br->br_wh = dget(wh);
-+ break;
-+
-+ default:
-+ BUG();
-+ }
-+
-+ out_dput:
-+ dput(plink);
-+ out_dput_wh:
-+ dput(wh);
-+ out:
-+ TraceErr(err);
-+ return err;
-+ out_nolink:
-+ Err("%.*s doesn't support link(2), use noplink and rw+nolwh\n",
-+ DLNPair(h_root));
-+ goto out_dput;
-+ out_err:
-+ Err("an error(%d) on the writable branch %.*s(%s)\n",
-+ err, DLNPair(h_root), au_sbtype(h_root->d_sb));
-+ goto out_dput;
-+}
-+
-+struct reinit_br_wh {
-+ struct super_block *sb;
-+ struct aufs_branch *br;
-+};
-+
-+static void reinit_br_wh(void *arg)
-+{
-+ int err;
-+ struct reinit_br_wh *a = arg;
-+ struct inode *hidden_dir, *dir;
-+ struct dentry *hidden_root;
-+ aufs_bindex_t bindex;
-+
-+ TraceEnter();
-+ DEBUG_ON(!a->br->br_wh || !a->br->br_wh->d_inode || current->fsuid);
-+
-+ err = 0;
-+ /* big lock */
-+ si_write_lock(a->sb);
-+ if (unlikely(!br_writable(a->br->br_perm)))
-+ goto out;
-+ bindex = find_brindex(a->sb, a->br->br_id);
-+ if (unlikely(bindex < 0))
-+ goto out;
-+
-+ dir = a->sb->s_root->d_inode;
-+ hidden_root = a->br->br_wh->d_parent;
-+ hidden_dir = hidden_root->d_inode;
-+ DEBUG_ON(!hidden_dir->i_op || !hidden_dir->i_op->link);
-+ hdir_lock(hidden_dir, dir, bindex);
-+ br_wh_write_lock(a->br);
-+ err = vfsub_unlink(hidden_dir, a->br->br_wh, /*dlgt*/0);
-+ //if (LktrCond) err = -1;
-+ dput(a->br->br_wh);
-+ a->br->br_wh = NULL;
-+ if (!err)
-+ err = init_wh(hidden_root, a->br, au_do_nfsmnt(a->br->br_mnt),
-+ a->sb);
-+ br_wh_write_unlock(a->br);
-+ hdir_unlock(hidden_dir, dir, bindex);
-+
-+ out:
-+ atomic_dec(&a->br->br_wh_running);
-+ br_put(a->br);
-+ si_write_unlock(a->sb);
-+ au_mntput(a->sb);
-+ kfree(arg);
-+ if (unlikely(err))
-+ IOErr("err %d\n", err);
-+}
-+
-+static void kick_reinit_br_wh(struct super_block *sb, struct aufs_branch *br)
-+{
-+ int do_dec;
-+ struct reinit_br_wh *arg;
-+
-+ do_dec = 1;
-+ if (atomic_inc_return(&br->br_wh_running) != 1)
-+ goto out;
-+
-+ // ignore ENOMEM
-+ arg = kmalloc(sizeof(*arg), GFP_KERNEL);
-+ if (arg) {
-+ // dec(wh_running), kfree(arg) and br_put() in reinit function
-+ arg->sb = sb;
-+ arg->br = br;
-+ br_get(br);
-+ /* prohibit umount */
-+ au_mntget(sb);
-+ au_wkq_nowait(reinit_br_wh, arg, /*dlgt*/0);
-+ do_dec = 0;
-+ }
-+
-+ out:
-+ if (do_dec)
-+ atomic_dec(&br->br_wh_running);
-+}
-+
-+/*
-+ * create the whiteoute @wh.
-+ */
-+static int link_or_create_wh(struct dentry *wh, struct super_block *sb,
-+ aufs_bindex_t bindex)
-+{
-+ int err, dlgt;
-+ struct aufs_branch *br;
-+ struct dentry *hidden_parent;
-+ struct inode *hidden_dir;
-+
-+ LKTRTrace("%.*s\n", DLNPair(wh));
-+ SiMustReadLock(sb);
-+ hidden_parent = wh->d_parent;
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ dlgt = need_dlgt(sb);
-+ br = stobr(sb, bindex);
-+ br_wh_read_lock(br);
-+ if (br->br_wh) {
-+ err = vfsub_link(br->br_wh, hidden_dir, wh, dlgt);
-+ if (!err || err != -EMLINK)
-+ goto out;
-+
-+ // link count full. re-initialize br_wh.
-+ kick_reinit_br_wh(sb, br);
-+ }
-+
-+ // return this error in this context
-+ err = vfsub_create(hidden_dir, wh, WH_MASK, NULL, dlgt);
-+
-+ out:
-+ br_wh_read_unlock(br);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * create or remove the diropq.
-+ */
-+static struct dentry *do_diropq(struct dentry *dentry, aufs_bindex_t bindex,
-+ int do_create, int dlgt)
-+{
-+ struct dentry *opq_dentry, *hidden_dentry;
-+ struct inode *hidden_dir;
-+ int err;
-+ struct super_block *sb;
-+ struct lkup_args lkup;
-+
-+ LKTRTrace("%.*s, bindex %d, do_create %d\n", DLNPair(dentry),
-+ bindex, do_create);
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ DEBUG_ON(!hidden_dentry);
-+ hidden_dir = hidden_dentry->d_inode;
-+ DEBUG_ON(!hidden_dir || !S_ISDIR(hidden_dir->i_mode));
-+ IMustLock(hidden_dir);
-+
-+ // already checked by au_test_perm().
-+ sb = dentry->d_sb;
-+ lkup.nfsmnt = au_nfsmnt(sb, bindex);
-+ lkup.dlgt = dlgt;
-+ opq_dentry = lkup_one(diropq_name.name, hidden_dentry, diropq_name.len,
-+ &lkup);
-+ //if (LktrCond) {dput(opq_dentry); opq_dentry = ERR_PTR(-1);}
-+ if (IS_ERR(opq_dentry))
-+ goto out;
-+
-+ if (do_create) {
-+ DEBUG_ON(opq_dentry->d_inode);
-+ err = link_or_create_wh(opq_dentry, sb, bindex);
-+ //if (LktrCond) {vfs_unlink(hidden_dir, opq_dentry); err = -1;}
-+ if (!err) {
-+ set_dbdiropq(dentry, bindex);
-+ goto out; /* success */
-+ }
-+ } else {
-+ DEBUG_ON(/* !S_ISDIR(dentry->d_inode->i_mode)
-+ * || */!opq_dentry->d_inode);
-+ err = vfsub_unlink(hidden_dir, opq_dentry, lkup.dlgt);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ set_dbdiropq(dentry, -1);
-+ }
-+ dput(opq_dentry);
-+ opq_dentry = ERR_PTR(err);
-+
-+ out:
-+ TraceErrPtr(opq_dentry);
-+ return opq_dentry;
-+}
-+
-+struct do_diropq_args {
-+ struct dentry **errp;
-+ struct dentry *dentry;
-+ aufs_bindex_t bindex;
-+ int do_create, dlgt;
-+};
-+
-+static void call_do_diropq(void *args)
-+{
-+ struct do_diropq_args *a = args;
-+ *a->errp = do_diropq(a->dentry, a->bindex, a->do_create, a->dlgt);
-+}
-+
-+struct dentry *sio_diropq(struct dentry *dentry, aufs_bindex_t bindex,
-+ int do_create, int dlgt)
-+{
-+ struct dentry *diropq, *hidden_dentry;
-+
-+ LKTRTrace("%.*s, bindex %d, do_create %d\n",
-+ DLNPair(dentry), bindex, do_create);
-+
-+ hidden_dentry = au_h_dptr_i(dentry, bindex);
-+ if (!au_test_perm(hidden_dentry->d_inode, MAY_EXEC | MAY_WRITE, dlgt))
-+ diropq = do_diropq(dentry, bindex, do_create, dlgt);
-+ else {
-+ struct do_diropq_args args = {
-+ .errp = &diropq,
-+ .dentry = dentry,
-+ .bindex = bindex,
-+ .do_create = do_create,
-+ .dlgt = dlgt
-+ };
-+ au_wkq_wait(call_do_diropq, &args, /*dlgt*/0);
-+ }
-+
-+ TraceErrPtr(diropq);
-+ return diropq;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * lookup whiteout dentry.
-+ * @hidden_parent: hidden parent dentry which must exist and be locked
-+ * @base_name: name of dentry which will be whiteouted
-+ * returns dentry for whiteout.
-+ */
-+struct dentry *lkup_wh(struct dentry *hidden_parent, struct qstr *base_name,
-+ struct lkup_args *lkup)
-+{
-+ int err;
-+ struct qstr wh_name;
-+ struct dentry *wh_dentry;
-+
-+ LKTRTrace("%.*s/%.*s\n", DLNPair(hidden_parent), LNPair(base_name));
-+ IMustLock(hidden_parent->d_inode);
-+
-+ err = au_alloc_whname(base_name->name, base_name->len, &wh_name);
-+ //if (LktrCond) {au_free_whname(&wh_name); err = -1;}
-+ wh_dentry = ERR_PTR(err);
-+ if (!err) {
-+ // do not superio.
-+ wh_dentry = lkup_one(wh_name.name, hidden_parent, wh_name.len,
-+ lkup);
-+ au_free_whname(&wh_name);
-+ }
-+ TraceErrPtr(wh_dentry);
-+ return wh_dentry;
-+}
-+
-+/*
-+ * link/create a whiteout for @dentry on @bindex.
-+ */
-+struct dentry *simple_create_wh(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct dentry *hidden_parent,
-+ struct lkup_args *lkup)
-+{
-+ struct dentry *wh_dentry;
-+ int err;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s/%.*s on b%d\n", DLNPair(hidden_parent),
-+ DLNPair(dentry), bindex);
-+
-+ sb = dentry->d_sb;
-+ wh_dentry = lkup_wh(hidden_parent, &dentry->d_name, lkup);
-+ //au_nfsmnt(sb, bindex), need_dlgt(sb));
-+ //if (LktrCond) {dput(wh_dentry); wh_dentry = ERR_PTR(-1);}
-+ if (!IS_ERR(wh_dentry) && !wh_dentry->d_inode) {
-+ IMustLock(hidden_parent->d_inode);
-+ err = link_or_create_wh(wh_dentry, sb, bindex);
-+ if (!err)
-+ set_dbwh(dentry, bindex);
-+ else {
-+ dput(wh_dentry);
-+ wh_dentry = ERR_PTR(err);
-+ }
-+ }
-+
-+ TraceErrPtr(wh_dentry);
-+ return wh_dentry;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* Delete all whiteouts in this directory in branch bindex. */
-+static int del_wh_children(struct aufs_nhash *whlist,
-+ struct dentry *hidden_parent, aufs_bindex_t bindex,
-+ struct lkup_args *lkup)
-+{
-+ int err, i;
-+ struct qstr wh_name;
-+ char *p;
-+ struct inode *hidden_dir;
-+ struct hlist_head *head;
-+ struct aufs_wh *tpos;
-+ struct hlist_node *pos;
-+ struct aufs_destr *str;
-+
-+ LKTRTrace("%.*s\n", DLNPair(hidden_parent));
-+ hidden_dir = hidden_parent->d_inode;
-+ IMustLock(hidden_dir);
-+ DEBUG_ON(IS_RDONLY(hidden_dir));
-+ //SiMustReadLock(??);
-+
-+ err = -ENOMEM;
-+ wh_name.name = p = __getname();
-+ //if (LktrCond) {__putname(p); wh_name.name = p = NULL;}
-+ if (unlikely(!wh_name.name))
-+ goto out;
-+ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN);
-+ p += AUFS_WH_PFX_LEN;
-+
-+ // already checked by au_test_perm().
-+ err = 0;
-+ for (i = 0; !err && i < AUFS_NHASH_SIZE; i++) {
-+ head = whlist->heads + i;
-+ hlist_for_each_entry(tpos, pos, head, wh_hash) {
-+ if (tpos->wh_bindex != bindex)
-+ continue;
-+ str = &tpos->wh_str;
-+ if (str->len + AUFS_WH_PFX_LEN <= PATH_MAX) {
-+ memcpy(p, str->name, str->len);
-+ wh_name.len = AUFS_WH_PFX_LEN + str->len;
-+ err = unlink_wh_name(hidden_parent, &wh_name,
-+ lkup);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ continue;
-+ break;
-+ }
-+ IOErr("whiteout name too long %.*s\n",
-+ str->len, str->name);
-+ err = -EIO;
-+ break;
-+ }
-+ }
-+ __putname(wh_name.name);
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct del_wh_children_args {
-+ int *errp;
-+ struct aufs_nhash *whlist;
-+ struct dentry *hidden_parent;
-+ aufs_bindex_t bindex;
-+ struct lkup_args *lkup;
-+};
-+
-+static void call_del_wh_children(void *args)
-+{
-+ struct del_wh_children_args *a = args;
-+ *a->errp = del_wh_children(a->whlist, a->hidden_parent, a->bindex,
-+ a->lkup);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * rmdir the whiteouted temporary named dir @hidden_dentry.
-+ * @whlist: whiteouted children.
-+ */
-+int rmdir_whtmp(struct dentry *hidden_dentry, struct aufs_nhash *whlist,
-+ aufs_bindex_t bindex, struct inode *dir, struct inode *inode)
-+{
-+ int err;
-+ struct inode *hidden_inode, *hidden_dir;
-+ struct lkup_args lkup;
-+ struct super_block *sb;
-+
-+ LKTRTrace("hd %.*s, b%d, i%lu\n",
-+ DLNPair(hidden_dentry), bindex, dir->i_ino);
-+ IMustLock(dir);
-+ IiMustAnyLock(dir);
-+ hidden_dir = hidden_dentry->d_parent->d_inode;
-+ IMustLock(hidden_dir);
-+
-+ sb = inode->i_sb;
-+ lkup.nfsmnt = au_nfsmnt(sb, bindex);
-+ lkup.dlgt = need_dlgt(sb);
-+ hidden_inode = hidden_dentry->d_inode;
-+ DEBUG_ON(hidden_inode != au_h_iptr_i(inode, bindex));
-+ hdir2_lock(hidden_inode, inode, bindex);
-+ if (!au_test_perm(hidden_inode, MAY_EXEC | MAY_WRITE, lkup.dlgt))
-+ err = del_wh_children(whlist, hidden_dentry, bindex, &lkup);
-+ else {
-+ // ugly
-+ int dlgt = lkup.dlgt;
-+ struct del_wh_children_args args = {
-+ .errp = &err,
-+ .whlist = whlist,
-+ .hidden_parent = hidden_dentry,
-+ .bindex = bindex,
-+ .lkup = &lkup
-+ };
-+
-+ lkup.dlgt = 0;
-+ au_wkq_wait(call_del_wh_children, &args, /*dlgt*/0);
-+ lkup.dlgt = dlgt;
-+ }
-+ hdir_unlock(hidden_inode, inode, bindex);
-+
-+ if (!err) {
-+ err = vfsub_rmdir(hidden_dir, hidden_dentry, lkup.dlgt);
-+ //d_drop(hidden_dentry);
-+ //if (LktrCond) err = -1;
-+ }
-+
-+ if (!err) {
-+ if (ibstart(dir) == bindex) {
-+ au_cpup_attr_timesizes(dir);
-+ //au_cpup_attr_nlink(dir);
-+ dir->i_nlink--;
-+ }
-+ return 0; /* success */
-+ }
-+
-+ Warn("failed removing %.*s(%d), ignored\n",
-+ DLNPair(hidden_dentry), err);
-+ return err;
-+}
-+
-+static void do_rmdir_whtmp(void *arg)
-+{
-+ int err;
-+ struct rmdir_whtmp_arg *a = arg;
-+ struct super_block *sb;
-+
-+ LKTRTrace("%.*s, b%d, dir i%lu\n",
-+ DLNPair(a->h_dentry), a->bindex, a->dir->i_ino);
-+
-+ i_lock(a->dir);
-+ sb = a->dir->i_sb;
-+ si_read_lock(sb);
-+ err = test_ro(sb, a->bindex, NULL);
-+ if (!err) {
-+ struct inode *hidden_dir = a->h_dentry->d_parent->d_inode;
-+
-+ ii_write_lock_child(a->inode);
-+ ii_write_lock_parent(a->dir);
-+ hdir_lock(hidden_dir, a->dir, a->bindex);
-+ err = rmdir_whtmp(a->h_dentry, &a->whlist, a->bindex,
-+ a->dir, a->inode);
-+ hdir_unlock(hidden_dir, a->dir, a->bindex);
-+ ii_write_unlock(a->dir);
-+ ii_write_unlock(a->inode);
-+ }
-+ dput(a->h_dentry);
-+ nhash_fin(&a->whlist);
-+ iput(a->inode);
-+ si_read_unlock(sb);
-+ au_mntput(sb);
-+ i_unlock(a->dir);
-+ iput(a->dir);
-+ kfree(arg);
-+ if (unlikely(err))
-+ IOErr("err %d\n", err);
-+}
-+
-+void kick_rmdir_whtmp(struct dentry *hidden_dentry, struct aufs_nhash *whlist,
-+ aufs_bindex_t bindex, struct inode *dir,
-+ struct inode *inode, struct rmdir_whtmp_arg *arg)
-+{
-+ LKTRTrace("%.*s\n", DLNPair(hidden_dentry));
-+ IMustLock(dir);
-+
-+ // all post-process will be done in do_rmdir_whtmp().
-+ arg->h_dentry = dget(hidden_dentry);
-+ nhash_init(&arg->whlist);
-+ nhash_move(&arg->whlist, whlist);
-+ arg->bindex = bindex;
-+ arg->dir = igrab(dir);
-+ arg->inode = igrab(inode);
-+ /* prohibit umount */
-+ au_mntget(dir->i_sb);
-+
-+ au_wkq_nowait(do_rmdir_whtmp, arg, /*dlgt*/0);
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/whout.h linux-2.6.22.1/fs/aufs/whout.h
---- linux-2.6.22.1.oorig/fs/aufs/whout.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/whout.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,87 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: whout.h,v 1.8 2007/05/14 03:41:52 sfjro Exp $ */
-+
-+#ifndef __AUFS_WHOUT_H__
-+#define __AUFS_WHOUT_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/aufs_type.h>
-+
-+int au_alloc_whname(const char *name, int len, struct qstr *wh);
-+void au_free_whname(struct qstr *wh);
-+
-+struct lkup_args;
-+int is_wh(struct dentry *h_parent, struct qstr *wh_name, int try_sio,
-+ struct lkup_args *lkup);
-+int is_diropq(struct dentry *h_dentry, struct lkup_args *lkup);
-+
-+struct dentry *lkup_whtmp(struct dentry *h_parent, struct qstr *prefix,
-+ struct lkup_args *lkup);
-+int rename_whtmp(struct dentry *dentry, aufs_bindex_t bindex);
-+int au_unlink_wh_dentry(struct inode *h_dir, struct dentry *wh_dentry,
-+ struct dentry *dentry, int dlgt);
-+
-+struct aufs_branch;
-+int init_wh(struct dentry *h_parent, struct aufs_branch *br,
-+ struct vfsmount *nfsmnt, struct super_block *sb);
-+
-+struct dentry *sio_diropq(struct dentry *dentry, aufs_bindex_t bindex,
-+ int do_create, int dlgt);
-+
-+struct dentry *lkup_wh(struct dentry *h_parent, struct qstr *base_name,
-+ struct lkup_args *lkup);
-+struct dentry *simple_create_wh(struct dentry *dentry, aufs_bindex_t bindex,
-+ struct dentry *h_parent,
-+ struct lkup_args *lkup);
-+
-+/* real rmdir the whiteout-ed dir */
-+struct rmdir_whtmp_arg {
-+ struct dentry *h_dentry;
-+ struct aufs_nhash whlist;
-+ aufs_bindex_t bindex;
-+ struct inode *dir, *inode;
-+};
-+
-+struct aufs_nhash;
-+int rmdir_whtmp(struct dentry *h_dentry, struct aufs_nhash *whlist,
-+ aufs_bindex_t bindex, struct inode *dir, struct inode *inode);
-+void kick_rmdir_whtmp(struct dentry *h_dentry, struct aufs_nhash *whlist,
-+ aufs_bindex_t bindex, struct inode *dir,
-+ struct inode *inode, struct rmdir_whtmp_arg *arg);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline
-+struct dentry *create_diropq(struct dentry *dentry, aufs_bindex_t bindex,
-+ int dlgt)
-+{
-+ return sio_diropq(dentry, bindex, 1, dlgt);
-+}
-+
-+static inline
-+int remove_diropq(struct dentry *dentry, aufs_bindex_t bindex, int dlgt)
-+{
-+ return PTR_ERR(sio_diropq(dentry, bindex, 0, dlgt));
-+}
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_WHOUT_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/wkq.c linux-2.6.22.1/fs/aufs/wkq.c
---- linux-2.6.22.1.oorig/fs/aufs/wkq.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/wkq.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,283 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: wkq.c,v 1.14 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+#include <linux/module.h>
-+#include "aufs.h"
-+
-+struct au_wkq *au_wkq;
-+
-+struct au_cred {
-+#ifdef CONFIG_AUFS_DLGT
-+ uid_t fsuid;
-+ gid_t fsgid;
-+ kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
-+ //unsigned keep_capabilities:1;
-+ //struct user_struct *user;
-+ //struct fs_struct *fs;
-+ //struct nsproxy *nsproxy;
-+#endif
-+};
-+
-+struct au_wkinfo {
-+ struct work_struct wk;
-+
-+ unsigned int wait:1;
-+ unsigned int dlgt:1;
-+ struct au_cred cred;
-+
-+ au_wkq_func_t func;
-+ void *args;
-+
-+ atomic_t *busyp;
-+ struct completion *comp;
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_DLGT
-+static void cred_store(struct au_cred *cred)
-+{
-+ cred->fsuid = current->fsuid;
-+ cred->fsgid = current->fsgid;
-+ cred->cap_effective = current->cap_effective;
-+ cred->cap_inheritable = current->cap_inheritable;
-+ cred->cap_permitted = current->cap_permitted;
-+}
-+
-+static void cred_revert(struct au_cred *cred)
-+{
-+ DEBUG_ON(!is_au_wkq(current));
-+ current->fsuid = cred->fsuid;
-+ current->fsgid = cred->fsgid;
-+ current->cap_effective = cred->cap_effective;
-+ current->cap_inheritable = cred->cap_inheritable;
-+ current->cap_permitted = cred->cap_permitted;
-+}
-+
-+static void cred_switch(struct au_cred *old, struct au_cred *new)
-+{
-+ cred_store(old);
-+ cred_revert(new);
-+}
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static void update_busy(struct au_wkq *wkq, struct au_wkinfo *wkinfo)
-+{
-+#ifdef CONFIG_AUFS_SYSAUFS
-+ unsigned int new, old;
-+
-+ do {
-+ new = atomic_read(wkinfo->busyp);
-+ old = wkq->max_busy;
-+ if (new <= old)
-+ break;
-+ } while (cmpxchg(&wkq->max_busy, old, new) == old);
-+#endif
-+}
-+
-+static int enqueue(struct au_wkq *wkq, struct au_wkinfo *wkinfo)
-+{
-+ wkinfo->busyp = &wkq->busy;
-+ update_busy(wkq, wkinfo);
-+ if (wkinfo->wait)
-+ return !queue_work(wkq->q, &wkinfo->wk);
-+ else
-+ return !schedule_work(&wkinfo->wk);
-+}
-+
-+static void do_wkq(struct au_wkinfo *wkinfo)
-+{
-+ unsigned int idle, n;
-+ int i, idle_idx;
-+
-+ TraceEnter();
-+
-+ while (1) {
-+ if (wkinfo->wait) {
-+ idle_idx = 0;
-+ idle = UINT_MAX;
-+ for (i = 0; i < aufs_nwkq; i++) {
-+ n = atomic_inc_return(&au_wkq[i].busy);
-+ if (n == 1 && !enqueue(au_wkq + i, wkinfo))
-+ return; /* success */
-+
-+ if (n < idle) {
-+ idle_idx = i;
-+ idle = n;
-+ }
-+ atomic_dec(&au_wkq[i].busy);
-+ }
-+ } else
-+ idle_idx = aufs_nwkq;
-+
-+ atomic_inc(&au_wkq[idle_idx].busy);
-+ if (!enqueue(au_wkq + idle_idx, wkinfo))
-+ return; /* success */
-+
-+ /* impossible? */
-+ Warn1("failed to queue_work()\n");
-+ yield();
-+ }
-+}
-+
-+static AuWkqFunc(wkq_func, wk)
-+{
-+ struct au_wkinfo *wkinfo = container_of(wk, struct au_wkinfo, wk);
-+
-+ LKTRTrace("wkinfo{%u, %u, %p, %p, %p}\n",
-+ wkinfo->wait, wkinfo->dlgt, wkinfo->func, wkinfo->busyp,
-+ wkinfo->comp);
-+#ifdef CONFIG_AUFS_DLGT
-+ if (!wkinfo->dlgt)
-+ wkinfo->func(wkinfo->args);
-+ else {
-+ struct au_cred cred;
-+ cred_switch(&cred, &wkinfo->cred);
-+ wkinfo->func(wkinfo->args);
-+ cred_revert(&cred);
-+ }
-+#else
-+ wkinfo->func(wkinfo->args);
-+#endif
-+ atomic_dec(wkinfo->busyp);
-+ if (wkinfo->wait)
-+ complete(wkinfo->comp);
-+ else {
-+ kfree(wkinfo);
-+ module_put(THIS_MODULE);
-+ }
-+}
-+
-+void au_wkq_run(au_wkq_func_t func, void *args, int dlgt, int do_wait)
-+{
-+ DECLARE_COMPLETION_ONSTACK(comp);
-+ struct au_wkinfo _wkinfo = {
-+ .wait = 1,
-+ .dlgt = !!dlgt,
-+ .func = func,
-+ .args = args,
-+ .comp = &comp
-+ }, *wkinfo = &_wkinfo;
-+
-+ LKTRTrace("dlgt %d, do_wait %d\n", dlgt, do_wait);
-+ DEBUG_ON(is_au_wkq(current));
-+
-+ if (unlikely(!do_wait)) {
-+ static DECLARE_WAIT_QUEUE_HEAD(wq);
-+ /*
-+ * never fail.
-+ * wkq_func() must free this wkinfo.
-+ * it highly depends upon the implementation of workqueue.
-+ */
-+ wait_event(wq, (wkinfo = kmalloc(sizeof(*wkinfo), GFP_KERNEL)));
-+ wkinfo->wait = 0;
-+ wkinfo->dlgt = !!dlgt;
-+ wkinfo->func = func;
-+ wkinfo->args = args;
-+ wkinfo->comp = NULL;
-+ __module_get(THIS_MODULE);
-+ }
-+
-+ AuInitWkq(&wkinfo->wk, wkq_func);
-+#ifdef CONFIG_AUFS_DLGT
-+ if (dlgt)
-+ cred_store(&wkinfo->cred);
-+#endif
-+ do_wkq(wkinfo);
-+ if (do_wait)
-+ wait_for_completion(wkinfo->comp);
-+}
-+
-+#if 0
-+void au_wkq_wait_nwtask(void)
-+{
-+ static DECLARE_WAIT_QUEUE_HEAD(wq);
-+ wait_event(wq, !atomic_read(&au_wkq[aufs_nwkq].busy));
-+}
-+#endif
-+
-+void au_wkq_fin(void)
-+{
-+ int i;
-+
-+ TraceEnter();
-+
-+ for (i = 0; i < aufs_nwkq; i++)
-+ if (au_wkq[i].q && !IS_ERR(au_wkq[i].q))
-+ destroy_workqueue(au_wkq[i].q);
-+ kfree(au_wkq);
-+}
-+
-+int __init au_wkq_init(void)
-+{
-+ int err, i;
-+ struct au_wkq *nowaitq;
-+
-+ LKTRTrace("%d\n", aufs_nwkq);
-+
-+ /* '+1' is for accounting of nowait queue */
-+ err = -ENOMEM;
-+ au_wkq = kcalloc(aufs_nwkq + 1, sizeof(*au_wkq), GFP_KERNEL);
-+ if (unlikely(!au_wkq))
-+ goto out;
-+
-+ err = 0;
-+ for (i = 0; i < aufs_nwkq; i++) {
-+ au_wkq[i].q = create_singlethread_workqueue(AUFS_WKQ_NAME);
-+ if (au_wkq[i].q && !IS_ERR(au_wkq[i].q)) {
-+ atomic_set(&au_wkq[i].busy, 0);
-+ au_wkq[i].max_busy = 0;
-+ continue;
-+ }
-+
-+ err = PTR_ERR(au_wkq[i].q);
-+ au_wkq_fin();
-+ break;
-+ }
-+
-+ /* nowait accounting */
-+ nowaitq = au_wkq + aufs_nwkq;
-+ atomic_set(&nowaitq->busy, 0);
-+ nowaitq->max_busy = 0;
-+ nowaitq->q = NULL;
-+
-+#if 0 // test accouting
-+ if (!err) {
-+ static void f(void *args) {
-+ DbgSleep(1);
-+ }
-+ int i;
-+ //au_debug_on();
-+ LKTRTrace("f %p\n", f);
-+ for (i = 0; i < 10; i++)
-+ au_wkq_nowait(f, NULL, 0);
-+ for (i = 0; i < aufs_nwkq; i++)
-+ au_wkq_wait(f, NULL, 0);
-+ DbgSleep(11);
-+ //au_debug_off();
-+ }
-+#endif
-+
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/wkq.h linux-2.6.22.1/fs/aufs/wkq.h
---- linux-2.6.22.1.oorig/fs/aufs/wkq.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/wkq.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,81 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: wkq.h,v 1.9 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+#ifndef __AUFS_WKQ_H__
-+#define __AUFS_WKQ_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/sched.h>
-+#include <linux/version.h>
-+#include <linux/workqueue.h>
-+
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-+#define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* internal workqueue named AUFS_WKQ_NAME */
-+struct au_wkq {
-+ struct workqueue_struct *q;
-+
-+ /* accounting */
-+ atomic_t busy;
-+ unsigned int max_busy;
-+} ;//__attribute__ ((aligned));
-+
-+typedef void (*au_wkq_func_t)(void *args);
-+
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
-+#define AuInitWkq(wk, func) INIT_WORK(wk, func)
-+#define AuWkqFunc(name, arg) void name(struct work_struct *arg)
-+#else
-+typedef void (*work_func_t)(void *arg);
-+#define AuInitWkq(wk, func) INIT_WORK(wk, func, wk)
-+#define AuWkqFunc(name, arg) void name(void *arg)
-+#endif
-+
-+extern struct au_wkq *au_wkq;
-+
-+void au_wkq_run(au_wkq_func_t func, void *args, int dlgt, int do_wait);
-+//void au_wkq_wait_nwtask(void);
-+int __init au_wkq_init(void);
-+void au_wkq_fin(void);
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static inline int is_au_wkq(struct task_struct *tsk)
-+{
-+ return (!tsk->mm && !strcmp(current->comm, AUFS_WKQ_NAME));
-+}
-+
-+static inline void au_wkq_wait(au_wkq_func_t func, void *args, int dlgt)
-+{
-+ au_wkq_run(func, args, dlgt, /*do_wait*/1);
-+}
-+
-+static inline void au_wkq_nowait(au_wkq_func_t func, void *args, int dlgt)
-+{
-+ au_wkq_run(func, args, dlgt, /*do_wait*/0);
-+}
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_WKQ_H__ */
-diff -rduNp linux-2.6.22.1.oorig/fs/aufs/xino.c linux-2.6.22.1/fs/aufs/xino.c
---- linux-2.6.22.1.oorig/fs/aufs/xino.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/aufs/xino.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,644 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: xino.c,v 1.27 2007/05/14 03:39:10 sfjro Exp $ */
-+
-+//#include <linux/fs.h>
-+#include <linux/fsnotify.h>
-+#include <asm/uaccess.h>
-+#include "aufs.h"
-+
-+static readf_t find_readf(struct file *h_file)
-+{
-+ const struct file_operations *fop = h_file->f_op;
-+
-+ if (fop) {
-+ if (fop->read)
-+ return fop->read;
-+ if (fop->aio_read)
-+ return do_sync_read;
-+ }
-+ return ERR_PTR(-ENOSYS);
-+}
-+
-+static writef_t find_writef(struct file *h_file)
-+{
-+ const struct file_operations *fop = h_file->f_op;
-+
-+ if (fop) {
-+ if (fop->write)
-+ return fop->write;
-+ if (fop->aio_write)
-+ return do_sync_write;
-+ }
-+ return ERR_PTR(-ENOSYS);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static ssize_t xino_fread(readf_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
-+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+
-+ LKTRTrace("%.*s, sz %lu, *pos %Ld\n",
-+ DLNPair(file->f_dentry), (unsigned long)size, *pos);
-+
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ do {
-+ err = func(file, (char __user*)buf, size, pos);
-+ } while (err == -EAGAIN || err == -EINTR);
-+ set_fs(oldfs);
-+
-+#if 0
-+ if (err > 0)
-+ fsnotify_access(file->f_dentry);
-+#endif
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static ssize_t do_xino_fwrite(writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
-+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+
-+ lockdep_off();
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ do {
-+ err = func(file, (const char __user*)buf, size, pos);
-+ } while (err == -EAGAIN || err == -EINTR);
-+ set_fs(oldfs);
-+ lockdep_on();
-+
-+#if 0
-+ if (err > 0)
-+ fsnotify_modify(file->f_dentry);
-+#endif
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+struct do_xino_fwrite_args {
-+ ssize_t *errp;
-+ writef_t func;
-+ struct file *file;
-+ void *buf;
-+ size_t size;
-+ loff_t *pos;
-+};
-+
-+static void call_do_xino_fwrite(void *args)
-+{
-+ struct do_xino_fwrite_args *a = args;
-+ *a->errp = do_xino_fwrite(a->func, a->file, a->buf, a->size, a->pos);
-+}
-+
-+static ssize_t xino_fwrite(writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
-+{
-+ ssize_t err;
-+
-+ LKTRTrace("%.*s, sz %lu, *pos %Ld\n",
-+ DLNPair(file->f_dentry), (unsigned long)size, *pos);
-+
-+ // signal block and no wkq?
-+ /*
-+ * it breaks RLIMIT_FSIZE and normal user's limit,
-+ * users should care about quota and real 'filesystem full.'
-+ */
-+ if (!is_au_wkq(current)) {
-+ struct do_xino_fwrite_args args = {
-+ .errp = &err,
-+ .func = func,
-+ .file = file,
-+ .buf = buf,
-+ .size = size,
-+ .pos = pos
-+ };
-+ au_wkq_wait(call_do_xino_fwrite, &args, /*dlgt*/0);
-+ } else
-+ err = do_xino_fwrite(func, file, buf, size, pos);
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/*
-+ * write @ino to the xinofile for the specified branch{@sb, @bindex}
-+ * at the position of @_ino.
-+ * when @ino is zero, it is written to the xinofile and means no entry.
-+ */
-+int xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ struct xino *xino)
-+{
-+ struct aufs_branch *br;
-+ loff_t pos;
-+ ssize_t sz;
-+
-+ LKTRTrace("b%d, hi%lu, i%lu\n", bindex, h_ino, xino->ino);
-+ //DEBUG_ON(!xino->ino /* || !xino->h_gen */);
-+ //WARN_ON(bindex == 0 && h_ino == 31);
-+
-+ if (unlikely(!au_flag_test(sb, AuFlag_XINO)))
-+ return 0;
-+
-+ br = stobr(sb, bindex);
-+ DEBUG_ON(!br || !br->br_xino);
-+ pos = h_ino * sizeof(*xino);
-+ sz = xino_fwrite(br->br_xino_write, br->br_xino, xino, sizeof(*xino),
-+ &pos);
-+ //if (LktrCond) sz = 1;
-+ if (sz == sizeof(*xino))
-+ return 0; /* success */
-+
-+ IOErr("write failed (%ld)\n", (long)sz);
-+ return -EIO;
-+}
-+
-+int xino_write0(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino)
-+{
-+ struct xino xino = {
-+ .ino = 0
-+ };
-+ return xino_write(sb, bindex, h_ino, &xino);
-+}
-+
-+// why is not atomic_long_inc_return defined?
-+static DEFINE_SPINLOCK(alir_lock);
-+static long atomic_long_inc_return(atomic_long_t *a)
-+{
-+ long l;
-+
-+ spin_lock(&alir_lock);
-+ atomic_long_inc(a);
-+ l = atomic_long_read(a);
-+ spin_unlock(&alir_lock);
-+ return l;
-+}
-+
-+ino_t xino_new_ino(struct super_block *sb)
-+{
-+ ino_t ino;
-+
-+ TraceEnter();
-+ ino = atomic_long_inc_return(&stosi(sb)->si_xino);
-+ BUILD_BUG_ON(AUFS_FIRST_INO < AUFS_ROOT_INO);
-+ if (ino >= AUFS_ROOT_INO)
-+ return ino;
-+ else {
-+ atomic_long_dec(&stosi(sb)->si_xino);
-+ IOErr1("inode number overflow\n");
-+ return 0;
-+ }
-+}
-+
-+/*
-+ * read @ino from xinofile for the specified branch{@sb, @bindex}
-+ * at the position of @h_ino.
-+ * if @ino does not exist and @do_new is true, get new one.
-+ */
-+int xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ struct xino *xino)
-+{
-+ int err;
-+ struct aufs_branch *br;
-+ struct file *file;
-+ loff_t pos;
-+ ssize_t sz;
-+
-+ LKTRTrace("b%d, hi%lu\n", bindex, h_ino);
-+
-+ err = 0;
-+ xino->ino = 0;
-+ if (unlikely(!au_flag_test(sb, AuFlag_XINO)))
-+ return 0; /* no ino */
-+
-+ br = stobr(sb, bindex);
-+ file = br->br_xino;
-+ DEBUG_ON(!file);
-+ pos = h_ino * sizeof(*xino);
-+ if (i_size_read(file->f_dentry->d_inode) < pos + sizeof(*xino))
-+ return 0; /* no ino */
-+
-+ sz = xino_fread(br->br_xino_read, file, xino, sizeof(*xino), &pos);
-+ if (sz == sizeof(*xino))
-+ return 0; /* success */
-+
-+ err = sz;
-+ if (unlikely(sz >= 0)) {
-+ err = -EIO;
-+ IOErr("xino read error (%ld)\n", (long)sz);
-+ }
-+
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct file *xino_create(struct super_block *sb, char *fname, int silent,
-+ struct dentry *parent)
-+{
-+ struct file *file;
-+ int err;
-+ struct dentry *hidden_parent;
-+ struct inode *hidden_dir;
-+ //const int udba = au_flag_test(sb, AuFlag_UDBA_INOTIFY);
-+
-+ LKTRTrace("%s\n", fname);
-+ //DEBUG_ON(!au_flag_test(sb, AuFlag_XINO));
-+
-+ // LSM may detect it
-+ // use sio?
-+ file = vfsub_filp_open(fname, O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE,
-+ S_IRUGO | S_IWUGO);
-+ //file = ERR_PTR(-1);
-+ if (IS_ERR(file)) {
-+ if (!silent)
-+ Err("open %s(%ld)\n", fname, PTR_ERR(file));
-+ return file;
-+ }
-+#if 0
-+ if (unlikely(udba && parent))
-+ au_direval_dec(parent);
-+#endif
-+
-+ /* keep file count */
-+ hidden_parent = dget_parent(file->f_dentry);
-+ hidden_dir = hidden_parent->d_inode;
-+ hi_lock_parent(hidden_dir);
-+ err = vfsub_unlink(hidden_dir, file->f_dentry, /*dlgt*/0);
-+#if 0
-+ if (unlikely(!err && udba && parent))
-+ au_direval_dec(parent);
-+#endif
-+ i_unlock(hidden_dir);
-+ dput(hidden_parent);
-+ if (unlikely(err)) {
-+ if (!silent)
-+ Err("unlink %s(%d)\n", fname, err);
-+ goto out;
-+ }
-+ if (sb != file->f_dentry->d_sb)
-+ return file; /* success */
-+
-+ if (!silent)
-+ Err("%s must be outside\n", fname);
-+ err = -EINVAL;
-+
-+ out:
-+ fput(file);
-+ file = ERR_PTR(err);
-+ return file;
-+}
-+
-+/*
-+ * find another branch who is on the same filesystem of the specified
-+ * branch{@btgt}. search until @bend.
-+ */
-+static int is_sb_shared(struct super_block *sb, aufs_bindex_t btgt,
-+ aufs_bindex_t bend)
-+{
-+ aufs_bindex_t bindex;
-+ struct super_block *tgt_sb = sbr_sb(sb, btgt);
-+
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (unlikely(btgt != bindex && tgt_sb == sbr_sb(sb, bindex)))
-+ return bindex;
-+ return -1;
-+}
-+
-+/*
-+ * create a new xinofile at the same place/path as @base_file.
-+ */
-+static struct file *xino_create2(struct file *base_file)
-+{
-+ struct file *file;
-+ int err;
-+ struct dentry *base, *dentry, *parent;
-+ struct inode *dir;
-+ struct qstr *name;
-+ struct lkup_args lkup = {
-+ .nfsmnt = NULL,
-+ .dlgt = 0
-+ };
-+
-+ base = base_file->f_dentry;
-+ LKTRTrace("%.*s\n", DLNPair(base));
-+ parent = dget_parent(base);
-+ dir = parent->d_inode;
-+ IMustLock(dir);
-+
-+ file = ERR_PTR(-EINVAL);
-+ if (unlikely(au_is_nfs(parent->d_sb)))
-+ goto out;
-+
-+ // do not superio, nor NFS.
-+ name = &base->d_name;
-+ dentry = lkup_one(name->name, parent, name->len, &lkup);
-+ //if (LktrCond) {dput(dentry); dentry = ERR_PTR(-1);}
-+ if (IS_ERR(dentry)) {
-+ file = (void*)dentry;
-+ Err("%.*s lookup err %ld\n", LNPair(name), PTR_ERR(dentry));
-+ goto out;
-+ }
-+ err = vfsub_create(dir, dentry, S_IRUGO | S_IWUGO, NULL, /*dlgt*/0);
-+ //if (LktrCond) {vfs_unlink(dir, dentry); err = -1;}
-+ if (unlikely(err)) {
-+ file = ERR_PTR(err);
-+ Err("%.*s create err %d\n", LNPair(name), err);
-+ goto out_dput;
-+ }
-+ file = dentry_open(dget(dentry), mntget(base_file->f_vfsmnt),
-+ O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ if (IS_ERR(file)) {
-+ Err("%.*s open err %ld\n", LNPair(name), PTR_ERR(file));
-+ goto out_dput;
-+ }
-+ err = vfsub_unlink(dir, dentry, /*dlgt*/0);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ goto out_dput; /* success */
-+
-+ Err("%.*s unlink err %d\n", LNPair(name), err);
-+ fput(file);
-+ file = ERR_PTR(err);
-+
-+ out_dput:
-+ dput(dentry);
-+ out:
-+ dput(parent);
-+ TraceErrPtr(file);
-+ return file;
-+}
-+
-+/*
-+ * initialize the xinofile for the specified branch{@sb, @bindex}
-+ * at the place/path where @base_file indicates.
-+ * test whether another branch is on the same filesystem or not,
-+ * if @do_test is true.
-+ */
-+int xino_init(struct super_block *sb, aufs_bindex_t bindex,
-+ struct file *base_file, int do_test)
-+{
-+ int err;
-+ struct aufs_branch *br;
-+ aufs_bindex_t bshared, bend;
-+ struct file *file;
-+ struct inode *inode, *hidden_inode;
-+ struct xino xino;
-+
-+ LKTRTrace("b%d, base_file %p, do_test %d\n",
-+ bindex, base_file, do_test);
-+ SiMustWriteLock(sb);
-+ DEBUG_ON(!au_flag_test(sb, AuFlag_XINO));
-+ br = stobr(sb, bindex);
-+ DEBUG_ON(br->br_xino);
-+
-+ file = NULL;
-+ bshared = -1;
-+ bend = sbend(sb);
-+ if (do_test)
-+ bshared = is_sb_shared(sb, bindex, bend);
-+ if (unlikely(bshared >= 0)) {
-+ struct aufs_branch *shared_br = stobr(sb, bshared);
-+ if (shared_br->br_xino) {
-+ file = shared_br->br_xino;
-+ get_file(file);
-+ }
-+ }
-+
-+ if (!file) {
-+ struct dentry *parent = dget_parent(base_file->f_dentry);
-+ struct inode *dir = parent->d_inode;
-+
-+ hi_lock_parent(dir);
-+ file = xino_create2(base_file);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ i_unlock(dir);
-+ dput(parent);
-+ err = PTR_ERR(file);
-+ if (IS_ERR(file))
-+ goto out;
-+ }
-+ br->br_xino_read = find_readf(file);
-+ err = PTR_ERR(br->br_xino_read);
-+ if (IS_ERR(br->br_xino_read))
-+ goto out_put;
-+ br->br_xino_write = find_writef(file);
-+ err = PTR_ERR(br->br_xino_write);
-+ if (IS_ERR(br->br_xino_write))
-+ goto out_put;
-+ br->br_xino = file;
-+
-+ inode = sb->s_root->d_inode;
-+ hidden_inode = au_h_iptr_i(inode, bindex);
-+ xino.ino = inode->i_ino;
-+ //xino.h_gen = hidden_inode->i_generation;
-+ //WARN_ON(xino.h_gen == AuXino_INVALID_HGEN);
-+ err = xino_write(sb, bindex, hidden_inode->i_ino, &xino);
-+ //if (LktrCond) err = -1;
-+ if (!err)
-+ return 0; /* success */
-+
-+ br->br_xino = NULL;
-+
-+ out_put:
-+ fput(file);
-+ out:
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * set xino mount option.
-+ */
-+int xino_set(struct super_block *sb, struct opt_xino *xino, int remount)
-+{
-+ int err, sparse;
-+ aufs_bindex_t bindex, bend;
-+ struct aufs_branch *br;
-+ struct dentry *parent;
-+ struct qstr *name;
-+ struct file *cur_xino;
-+ struct inode *dir;
-+
-+ LKTRTrace("%s\n", xino->path);
-+
-+ err = 0;
-+ name = &xino->file->f_dentry->d_name;
-+ parent = dget_parent(xino->file->f_dentry);
-+ dir = parent->d_inode;
-+ cur_xino = stobr(sb, 0)->br_xino;
-+ if (remount
-+ && cur_xino
-+ && cur_xino->f_dentry->d_parent == parent
-+ && name->len == cur_xino->f_dentry->d_name.len
-+ && !memcmp(name->name, cur_xino->f_dentry->d_name.name, name->len))
-+ goto out;
-+
-+ au_flag_set(sb, AuFlag_XINO);
-+ bend = sbend(sb);
-+ for (bindex = bend; bindex >= 0; bindex--) {
-+ br = stobr(sb, bindex);
-+ if (unlikely(br->br_xino && file_count(br->br_xino) > 1)) {
-+ fput(br->br_xino);
-+ br->br_xino = NULL;
-+ }
-+ }
-+
-+ for (bindex = 0; bindex <= bend; bindex++) {
-+ struct file *file;
-+ struct inode *inode;
-+
-+ br = stobr(sb, bindex);
-+ if (unlikely(!br->br_xino))
-+ continue;
-+
-+ DEBUG_ON(file_count(br->br_xino) != 1);
-+ hi_lock_parent(dir);
-+ file = xino_create2(xino->file);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ err = PTR_ERR(file);
-+ if (IS_ERR(file)) {
-+ i_unlock(dir);
-+ break;
-+ }
-+ inode = br->br_xino->f_dentry->d_inode;
-+ err = au_copy_file(file, br->br_xino, i_size_read(inode), sb,
-+ &sparse);
-+ //if (LktrCond) err = -1;
-+ i_unlock(dir);
-+ if (unlikely(err)) {
-+ fput(file);
-+ break;
-+ }
-+ fput(br->br_xino);
-+ br->br_xino = file;
-+ br->br_xino_read = find_readf(file);
-+ DEBUG_ON(IS_ERR(br->br_xino_read));
-+ br->br_xino_write = find_writef(file);
-+ DEBUG_ON(IS_ERR(br->br_xino_write));
-+ }
-+
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (unlikely(!stobr(sb, bindex)->br_xino)) {
-+ err = xino_init(sb, bindex, xino->file, /*do_test*/1);
-+ //if (LktrCond) {fput(stobr(sb, bindex)->br_xino);
-+ //stobr(sb, bindex)->br_xino = NULL; err = -1;}
-+ if (!err)
-+ continue;
-+ IOErr("creating xino for branch %d(%d), "
-+ "forcing noxino\n", bindex, err);
-+ err = -EIO;
-+ break;
-+ }
-+ out:
-+ dput(parent);
-+ if (!err)
-+ au_flag_set(sb, AuFlag_XINO);
-+ else
-+ au_flag_clr(sb, AuFlag_XINO);
-+ TraceErr(err);
-+ return err;
-+}
-+
-+/*
-+ * clear xino mount option
-+ */
-+int xino_clr(struct super_block *sb)
-+{
-+ aufs_bindex_t bindex, bend;
-+
-+ TraceEnter();
-+ SiMustWriteLock(sb);
-+
-+ bend = sbend(sb);
-+ for (bindex = 0; bindex <= bend; bindex++) {
-+ struct aufs_branch *br;
-+ br = stobr(sb, bindex);
-+ if (br->br_xino) {
-+ fput(br->br_xino);
-+ br->br_xino = NULL;
-+ }
-+ }
-+
-+ //todo: need to make iunique() to return the larger inode number
-+
-+ au_flag_clr(sb, AuFlag_XINO);
-+ return 0;
-+}
-+
-+/*
-+ * create a xinofile at the default place/path.
-+ */
-+struct file *xino_def(struct super_block *sb)
-+{
-+ struct file *file;
-+ aufs_bindex_t bend, bindex, bwr;
-+ char *page, *p;
-+
-+ bend = sbend(sb);
-+ bwr = -1;
-+ for (bindex = 0; bindex <= bend; bindex++)
-+ if (br_writable(sbr_perm(sb, bindex))
-+ && !au_is_nfs(au_h_dptr_i(sb->s_root, bindex)->d_sb)) {
-+ bwr = bindex;
-+ break;
-+ }
-+
-+ if (bwr != -1) {
-+ // todo: rewrite with lkup_one()
-+ file = ERR_PTR(-ENOMEM);
-+ page = __getname();
-+ //if (LktrCond) {__putname(page); page = NULL;}
-+ if (unlikely(!page))
-+ goto out;
-+ p = d_path(au_h_dptr_i(sb->s_root, bwr), sbr_mnt(sb, bwr), page,
-+ PATH_MAX - sizeof(AUFS_XINO_FNAME));
-+ //if (LktrCond) p = ERR_PTR(-1);
-+ file = (void*)p;
-+ if (p && !IS_ERR(p)) {
-+ strcat(p, "/" AUFS_XINO_FNAME);
-+ LKTRTrace("%s\n", p);
-+ file = xino_create(sb, p, /*silent*/0, sb->s_root);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ }
-+ __putname(page);
-+ } else {
-+ file = xino_create(sb, AUFS_XINO_DEFPATH, /*silent*/0,
-+ /*parent*/NULL);
-+ //if (LktrCond) {fput(file); file = ERR_PTR(-1);}
-+ }
-+
-+ out:
-+ TraceErrPtr(file);
-+ return file;
-+}
-diff -rduNp linux-2.6.22.1.oorig/fs/squashfs/Makefile linux-2.6.22.1/fs/squashfs/Makefile
---- linux-2.6.22.1.oorig/fs/squashfs/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/squashfs/Makefile 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,7 @@
-+#
-+# Makefile for the linux squashfs routines.
-+#
-+
-+obj-$(CONFIG_SQUASHFS) += squashfs.o
-+squashfs-y += inode.o
-+squashfs-y += squashfs2_0.o
-diff -rduNp linux-2.6.22.1.oorig/fs/squashfs/inode.c linux-2.6.22.1/fs/squashfs/inode.c
---- linux-2.6.22.1.oorig/fs/squashfs/inode.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/squashfs/inode.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,2329 @@
-+/*
-+ * Squashfs - a compressed read only filesystem for Linux
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * inode.c
-+ */
-+
-+#include <linux/squashfs_fs.h>
-+#include <linux/module.h>
-+#include <linux/zlib.h>
-+#include <linux/fs.h>
-+#include <linux/squashfs_fs_sb.h>
-+#include <linux/squashfs_fs_i.h>
-+#include <linux/buffer_head.h>
-+#include <linux/vfs.h>
-+#include <linux/vmalloc.h>
-+#include <linux/smp_lock.h>
-+
-+#include "squashfs.h"
-+
-+static void vfs_read_inode(struct inode *i);
-+static struct dentry *squashfs_get_parent(struct dentry *child);
-+static int squashfs_read_inode(struct inode *i, squashfs_inode_t inode);
-+static int squashfs_statfs(struct dentry *, struct kstatfs *);
-+static int squashfs_symlink_readpage(struct file *file, struct page *page);
-+static long long read_blocklist(struct inode *inode, int index,
-+ int readahead_blks, char *block_list,
-+ unsigned short **block_p, unsigned int *bsize);
-+static int squashfs_readpage(struct file *file, struct page *page);
-+static int squashfs_readpage4K(struct file *file, struct page *page);
-+static int squashfs_readdir(struct file *, void *, filldir_t);
-+static struct dentry *squashfs_lookup(struct inode *, struct dentry *,
-+ struct nameidata *);
-+static int squashfs_remount(struct super_block *s, int *flags, char *data);
-+static void squashfs_put_super(struct super_block *);
-+static int squashfs_get_sb(struct file_system_type *,int, const char *, void *,
-+ struct vfsmount *);
-+static struct inode *squashfs_alloc_inode(struct super_block *sb);
-+static void squashfs_destroy_inode(struct inode *inode);
-+static int init_inodecache(void);
-+static void destroy_inodecache(void);
-+
-+static struct file_system_type squashfs_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "squashfs",
-+ .get_sb = squashfs_get_sb,
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV
-+};
-+
-+static const unsigned char squashfs_filetype_table[] = {
-+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
-+};
-+
-+static struct super_operations squashfs_super_ops = {
-+ .alloc_inode = squashfs_alloc_inode,
-+ .destroy_inode = squashfs_destroy_inode,
-+ .statfs = squashfs_statfs,
-+ .put_super = squashfs_put_super,
-+ .remount_fs = squashfs_remount
-+};
-+
-+static struct super_operations squashfs_export_super_ops = {
-+ .alloc_inode = squashfs_alloc_inode,
-+ .destroy_inode = squashfs_destroy_inode,
-+ .statfs = squashfs_statfs,
-+ .put_super = squashfs_put_super,
-+ .read_inode = vfs_read_inode
-+};
-+
-+static struct export_operations squashfs_export_ops = {
-+ .get_parent = squashfs_get_parent
-+};
-+
-+SQSH_EXTERN const struct address_space_operations squashfs_symlink_aops = {
-+ .readpage = squashfs_symlink_readpage
-+};
-+
-+SQSH_EXTERN const struct address_space_operations squashfs_aops = {
-+ .readpage = squashfs_readpage
-+};
-+
-+SQSH_EXTERN const struct address_space_operations squashfs_aops_4K = {
-+ .readpage = squashfs_readpage4K
-+};
-+
-+static const struct file_operations squashfs_dir_ops = {
-+ .read = generic_read_dir,
-+ .readdir = squashfs_readdir
-+};
-+
-+SQSH_EXTERN struct inode_operations squashfs_dir_inode_ops = {
-+ .lookup = squashfs_lookup
-+};
-+
-+
-+static struct buffer_head *get_block_length(struct super_block *s,
-+ int *cur_index, int *offset, int *c_byte)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ unsigned short temp;
-+ struct buffer_head *bh;
-+
-+ if (!(bh = sb_bread(s, *cur_index)))
-+ goto out;
-+
-+ if (msblk->devblksize - *offset == 1) {
-+ if (msblk->swap)
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ else
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ brelse(bh);
-+ if (!(bh = sb_bread(s, ++(*cur_index))))
-+ goto out;
-+ if (msblk->swap)
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ bh->b_data);
-+ else
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ bh->b_data);
-+ *c_byte = temp;
-+ *offset = 1;
-+ } else {
-+ if (msblk->swap) {
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ (bh->b_data + *offset + 1));
-+ } else {
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ (bh->b_data + *offset + 1));
-+ }
-+ *c_byte = temp;
-+ *offset += 2;
-+ }
-+
-+ if (SQUASHFS_CHECK_DATA(msblk->sblk.flags)) {
-+ if (*offset == msblk->devblksize) {
-+ brelse(bh);
-+ if (!(bh = sb_bread(s, ++(*cur_index))))
-+ goto out;
-+ *offset = 0;
-+ }
-+ if (*((unsigned char *) (bh->b_data + *offset)) !=
-+ SQUASHFS_MARKER_BYTE) {
-+ ERROR("Metadata block marker corrupt @ %x\n",
-+ *cur_index);
-+ brelse(bh);
-+ goto out;
-+ }
-+ (*offset)++;
-+ }
-+ return bh;
-+
-+out:
-+ return NULL;
-+}
-+
-+
-+SQSH_EXTERN unsigned int squashfs_read_data(struct super_block *s, char *buffer,
-+ long long index, unsigned int length,
-+ long long *next_index, int srclength)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ struct buffer_head *bh[((SQUASHFS_FILE_MAX_SIZE - 1) >>
-+ msblk->devblksize_log2) + 2];
-+ unsigned int offset = index & ((1 << msblk->devblksize_log2) - 1);
-+ unsigned int cur_index = index >> msblk->devblksize_log2;
-+ int bytes, avail_bytes, b = 0, k = 0;
-+ unsigned int compressed;
-+ unsigned int c_byte = length;
-+
-+ if (c_byte) {
-+ bytes = msblk->devblksize - offset;
-+ compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte);
-+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
-+
-+ TRACE("Block @ 0x%llx, %scompressed size %d, src size %d\n", index, compressed
-+ ? "" : "un", (unsigned int) c_byte, srclength);
-+
-+ if (c_byte > srclength || index < 0 || (index + c_byte) > sblk->bytes_used)
-+ goto read_failure;
-+
-+ if (!(bh[0] = sb_getblk(s, cur_index)))
-+ goto block_release;
-+
-+ for (b = 1; bytes < c_byte; b++) {
-+ if (!(bh[b] = sb_getblk(s, ++cur_index)))
-+ goto block_release;
-+ bytes += msblk->devblksize;
-+ }
-+ ll_rw_block(READ, b, bh);
-+ } else {
-+ if (index < 0 || (index + 2) > sblk->bytes_used)
-+ goto read_failure;
-+
-+ if (!(bh[0] = get_block_length(s, &cur_index, &offset,
-+ &c_byte)))
-+ goto read_failure;
-+
-+ bytes = msblk->devblksize - offset;
-+ compressed = SQUASHFS_COMPRESSED(c_byte);
-+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
-+
-+ TRACE("Block @ 0x%llx, %scompressed size %d\n", index, compressed
-+ ? "" : "un", (unsigned int) c_byte);
-+
-+ if (c_byte > srclength || (index + c_byte) > sblk->bytes_used)
-+ goto read_failure;
-+
-+ for (b = 1; bytes < c_byte; b++) {
-+ if (!(bh[b] = sb_getblk(s, ++cur_index)))
-+ goto block_release;
-+ bytes += msblk->devblksize;
-+ }
-+ ll_rw_block(READ, b - 1, bh + 1);
-+ }
-+
-+ if (compressed) {
-+ int zlib_err = 0;
-+
-+ /*
-+ * uncompress block
-+ */
-+
-+ mutex_lock(&msblk->read_data_mutex);
-+
-+ msblk->stream.next_out = buffer;
-+ msblk->stream.avail_out = srclength;
-+
-+ for (bytes = 0; k < b; k++) {
-+ avail_bytes = (c_byte - bytes) > (msblk->devblksize - offset) ?
-+ msblk->devblksize - offset :
-+ c_byte - bytes;
-+ wait_on_buffer(bh[k]);
-+ if (!buffer_uptodate(bh[k]))
-+ goto release_mutex;
-+
-+ msblk->stream.next_in = bh[k]->b_data + offset;
-+ msblk->stream.avail_in = avail_bytes;
-+
-+ if (k == 0) {
-+ zlib_err = zlib_inflateInit(&msblk->stream);
-+ if (zlib_err != Z_OK) {
-+ ERROR("zlib_inflateInit returned unexpected result 0x%x, srclength %d\n",
-+ zlib_err, srclength);
-+ goto release_mutex;
-+ }
-+
-+ if (avail_bytes == 0) {
-+ offset = 0;
-+ brelse(bh[k]);
-+ continue;
-+ }
-+ }
-+
-+ zlib_err = zlib_inflate(&msblk->stream, Z_NO_FLUSH);
-+ if (zlib_err != Z_OK && zlib_err != Z_STREAM_END) {
-+ ERROR("zlib_inflate returned unexpected result 0x%x, srclength %d, avail_in %d, avail_out %d\n",
-+ zlib_err, srclength, msblk->stream.avail_in, msblk->stream.avail_out);
-+ goto release_mutex;
-+ }
-+
-+ bytes += avail_bytes;
-+ offset = 0;
-+ brelse(bh[k]);
-+ }
-+
-+ if (zlib_err != Z_STREAM_END)
-+ goto release_mutex;
-+
-+ zlib_err = zlib_inflateEnd(&msblk->stream);
-+ if (zlib_err != Z_OK) {
-+ ERROR("zlib_inflateEnd returned unexpected result 0x%x, srclength %d\n",
-+ zlib_err, srclength);
-+ goto release_mutex;
-+ }
-+ bytes = msblk->stream.total_out;
-+ mutex_unlock(&msblk->read_data_mutex);
-+ } else {
-+ int i;
-+
-+ for(i = 0; i < b; i++) {
-+ wait_on_buffer(bh[i]);
-+ if(!buffer_uptodate(bh[i]))
-+ goto block_release;
-+ }
-+
-+ for (bytes = 0; k < b; k++) {
-+ avail_bytes = (c_byte - bytes) > (msblk->devblksize - offset) ?
-+ msblk->devblksize - offset :
-+ c_byte - bytes;
-+ memcpy(buffer + bytes, bh[k]->b_data + offset, avail_bytes);
-+ bytes += avail_bytes;
-+ offset = 0;
-+ brelse(bh[k]);
-+ }
-+ }
-+
-+ if (next_index)
-+ *next_index = index + c_byte + (length ? 0 :
-+ (SQUASHFS_CHECK_DATA(msblk->sblk.flags)
-+ ? 3 : 2));
-+ return bytes;
-+
-+release_mutex:
-+ mutex_unlock(&msblk->read_data_mutex);
-+
-+block_release:
-+ for (; k < b; k++)
-+ brelse(bh[k]);
-+
-+read_failure:
-+ ERROR("sb_bread failed reading block 0x%x\n", cur_index);
-+ return 0;
-+}
-+
-+
-+SQSH_EXTERN int squashfs_get_cached_block(struct super_block *s, char *buffer,
-+ long long block, unsigned int offset,
-+ int length, long long *next_block,
-+ unsigned int *next_offset)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ int n, i, bytes, return_length = length;
-+ long long next_index;
-+
-+ TRACE("Entered squashfs_get_cached_block [%llx:%x]\n", block, offset);
-+
-+ while ( 1 ) {
-+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
-+ if (msblk->block_cache[i].block == block)
-+ break;
-+
-+ mutex_lock(&msblk->block_cache_mutex);
-+
-+ if (i == SQUASHFS_CACHED_BLKS) {
-+ /* read inode header block */
-+ for (i = msblk->next_cache, n = SQUASHFS_CACHED_BLKS;
-+ n ; n --, i = (i + 1) %
-+ SQUASHFS_CACHED_BLKS)
-+ if (msblk->block_cache[i].block !=
-+ SQUASHFS_USED_BLK)
-+ break;
-+
-+ if (n == 0) {
-+ wait_queue_t wait;
-+
-+ init_waitqueue_entry(&wait, current);
-+ add_wait_queue(&msblk->waitq, &wait);
-+ set_current_state(TASK_UNINTERRUPTIBLE);
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ schedule();
-+ set_current_state(TASK_RUNNING);
-+ remove_wait_queue(&msblk->waitq, &wait);
-+ continue;
-+ }
-+ msblk->next_cache = (i + 1) % SQUASHFS_CACHED_BLKS;
-+
-+ if (msblk->block_cache[i].block ==
-+ SQUASHFS_INVALID_BLK) {
-+ if (!(msblk->block_cache[i].data =
-+ kmalloc(SQUASHFS_METADATA_SIZE,
-+ GFP_KERNEL))) {
-+ ERROR("Failed to allocate cache"
-+ "block\n");
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ goto out;
-+ }
-+ }
-+
-+ msblk->block_cache[i].block = SQUASHFS_USED_BLK;
-+ mutex_unlock(&msblk->block_cache_mutex);
-+
-+ msblk->block_cache[i].length = squashfs_read_data(s,
-+ msblk->block_cache[i].data, block, 0, &next_index, SQUASHFS_METADATA_SIZE);
-+ if (msblk->block_cache[i].length == 0) {
-+ ERROR("Unable to read cache block [%llx:%x]\n",
-+ block, offset);
-+ mutex_lock(&msblk->block_cache_mutex);
-+ msblk->block_cache[i].block = SQUASHFS_INVALID_BLK;
-+ kfree(msblk->block_cache[i].data);
-+ wake_up(&msblk->waitq);
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ goto out;
-+ }
-+
-+ mutex_lock(&msblk->block_cache_mutex);
-+ wake_up(&msblk->waitq);
-+ msblk->block_cache[i].block = block;
-+ msblk->block_cache[i].next_index = next_index;
-+ TRACE("Read cache block [%llx:%x]\n", block, offset);
-+ }
-+
-+ if (msblk->block_cache[i].block != block) {
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ continue;
-+ }
-+
-+ bytes = msblk->block_cache[i].length - offset;
-+
-+ if (bytes < 1) {
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ goto out;
-+ } else if (bytes >= length) {
-+ if (buffer)
-+ memcpy(buffer, msblk->block_cache[i].data +
-+ offset, length);
-+ if (msblk->block_cache[i].length - offset == length) {
-+ *next_block = msblk->block_cache[i].next_index;
-+ *next_offset = 0;
-+ } else {
-+ *next_block = block;
-+ *next_offset = offset + length;
-+ }
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ goto finish;
-+ } else {
-+ if (buffer) {
-+ memcpy(buffer, msblk->block_cache[i].data +
-+ offset, bytes);
-+ buffer += bytes;
-+ }
-+ block = msblk->block_cache[i].next_index;
-+ mutex_unlock(&msblk->block_cache_mutex);
-+ length -= bytes;
-+ offset = 0;
-+ }
-+ }
-+
-+finish:
-+ return return_length;
-+out:
-+ return 0;
-+}
-+
-+
-+static int get_fragment_location(struct super_block *s, unsigned int fragment,
-+ long long *fragment_start_block,
-+ unsigned int *fragment_size)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ long long start_block =
-+ msblk->fragment_index[SQUASHFS_FRAGMENT_INDEX(fragment)];
-+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET(fragment);
-+ struct squashfs_fragment_entry fragment_entry;
-+
-+ if (msblk->swap) {
-+ struct squashfs_fragment_entry sfragment_entry;
-+
-+ if (!squashfs_get_cached_block(s, (char *) &sfragment_entry,
-+ start_block, offset,
-+ sizeof(sfragment_entry), &start_block,
-+ &offset))
-+ goto out;
-+ SQUASHFS_SWAP_FRAGMENT_ENTRY(&fragment_entry, &sfragment_entry);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *) &fragment_entry,
-+ start_block, offset,
-+ sizeof(fragment_entry), &start_block,
-+ &offset))
-+ goto out;
-+
-+ *fragment_start_block = fragment_entry.start_block;
-+ *fragment_size = fragment_entry.size;
-+
-+ return 1;
-+
-+out:
-+ return 0;
-+}
-+
-+
-+SQSH_EXTERN void release_cached_fragment(struct squashfs_sb_info *msblk, struct
-+ squashfs_fragment_cache *fragment)
-+{
-+ mutex_lock(&msblk->fragment_mutex);
-+ fragment->locked --;
-+ wake_up(&msblk->fragment_wait_queue);
-+ mutex_unlock(&msblk->fragment_mutex);
-+}
-+
-+
-+SQSH_EXTERN struct squashfs_fragment_cache *get_cached_fragment(struct super_block
-+ *s, long long start_block,
-+ int length)
-+{
-+ int i, n;
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ while ( 1 ) {
-+ mutex_lock(&msblk->fragment_mutex);
-+
-+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS &&
-+ msblk->fragment[i].block != start_block; i++);
-+
-+ if (i == SQUASHFS_CACHED_FRAGMENTS) {
-+ for (i = msblk->next_fragment, n =
-+ SQUASHFS_CACHED_FRAGMENTS; n &&
-+ msblk->fragment[i].locked; n--, i = (i + 1) %
-+ SQUASHFS_CACHED_FRAGMENTS);
-+
-+ if (n == 0) {
-+ wait_queue_t wait;
-+
-+ init_waitqueue_entry(&wait, current);
-+ add_wait_queue(&msblk->fragment_wait_queue,
-+ &wait);
-+ set_current_state(TASK_UNINTERRUPTIBLE);
-+ mutex_unlock(&msblk->fragment_mutex);
-+ schedule();
-+ set_current_state(TASK_RUNNING);
-+ remove_wait_queue(&msblk->fragment_wait_queue,
-+ &wait);
-+ continue;
-+ }
-+ msblk->next_fragment = (msblk->next_fragment + 1) %
-+ SQUASHFS_CACHED_FRAGMENTS;
-+
-+ if (msblk->fragment[i].data == NULL)
-+ if (!(msblk->fragment[i].data = SQUASHFS_ALLOC
-+ (SQUASHFS_FILE_MAX_SIZE))) {
-+ ERROR("Failed to allocate fragment "
-+ "cache block\n");
-+ mutex_unlock(&msblk->fragment_mutex);
-+ goto out;
-+ }
-+
-+ msblk->fragment[i].block = SQUASHFS_INVALID_BLK;
-+ msblk->fragment[i].locked = 1;
-+ mutex_unlock(&msblk->fragment_mutex);
-+
-+ if (!(msblk->fragment[i].length = squashfs_read_data(s,
-+ msblk->fragment[i].data,
-+ start_block, length, NULL, sblk->block_size))) {
-+ ERROR("Unable to read fragment cache block "
-+ "[%llx]\n", start_block);
-+ msblk->fragment[i].locked = 0;
-+ smp_mb();
-+ goto out;
-+ }
-+
-+ mutex_lock(&msblk->fragment_mutex);
-+ msblk->fragment[i].block = start_block;
-+ TRACE("New fragment %d, start block %lld, locked %d\n",
-+ i, msblk->fragment[i].block,
-+ msblk->fragment[i].locked);
-+ mutex_unlock(&msblk->fragment_mutex);
-+ break;
-+ }
-+
-+ msblk->fragment[i].locked++;
-+ mutex_unlock(&msblk->fragment_mutex);
-+ TRACE("Got fragment %d, start block %lld, locked %d\n", i,
-+ msblk->fragment[i].block,
-+ msblk->fragment[i].locked);
-+ break;
-+ }
-+
-+ return &msblk->fragment[i];
-+
-+out:
-+ return NULL;
-+}
-+
-+
-+static void squashfs_new_inode(struct squashfs_sb_info *msblk, struct inode *i,
-+ struct squashfs_base_inode_header *inodeb)
-+{
-+ i->i_ino = inodeb->inode_number;
-+ i->i_mtime.tv_sec = inodeb->mtime;
-+ i->i_atime.tv_sec = inodeb->mtime;
-+ i->i_ctime.tv_sec = inodeb->mtime;
-+ i->i_uid = msblk->uid[inodeb->uid];
-+ i->i_mode = inodeb->mode;
-+ i->i_size = 0;
-+ if (inodeb->guid == SQUASHFS_GUIDS)
-+ i->i_gid = i->i_uid;
-+ else
-+ i->i_gid = msblk->guid[inodeb->guid];
-+}
-+
-+
-+static squashfs_inode_t squashfs_inode_lookup(struct super_block *s, int ino)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ long long start = msblk->inode_lookup_table[SQUASHFS_LOOKUP_BLOCK(ino - 1)];
-+ int offset = SQUASHFS_LOOKUP_BLOCK_OFFSET(ino - 1);
-+ squashfs_inode_t inode;
-+
-+ TRACE("Entered squashfs_inode_lookup, inode_number = %d\n", ino);
-+
-+ if (msblk->swap) {
-+ squashfs_inode_t sinode;
-+
-+ if (!squashfs_get_cached_block(s, (char *) &sinode, start, offset,
-+ sizeof(sinode), &start, &offset))
-+ goto out;
-+ SQUASHFS_SWAP_INODE_T((&inode), &sinode);
-+ } else if (!squashfs_get_cached_block(s, (char *) &inode, start, offset,
-+ sizeof(inode), &start, &offset))
-+ goto out;
-+
-+ TRACE("squashfs_inode_lookup, inode = 0x%llx\n", inode);
-+
-+ return inode;
-+
-+out:
-+ return SQUASHFS_INVALID_BLK;
-+}
-+
-+
-+static void vfs_read_inode(struct inode *i)
-+{
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ squashfs_inode_t inode = squashfs_inode_lookup(i->i_sb, i->i_ino);
-+
-+ TRACE("Entered vfs_read_inode\n");
-+
-+ if(inode != SQUASHFS_INVALID_BLK)
-+ (msblk->read_inode)(i, inode);
-+}
-+
-+
-+static struct dentry *squashfs_get_parent(struct dentry *child)
-+{
-+ struct inode *i = child->d_inode;
-+ struct inode *parent = iget(i->i_sb, SQUASHFS_I(i)->u.s2.parent_inode);
-+ struct dentry *rv;
-+
-+ TRACE("Entered squashfs_get_parent\n");
-+
-+ if(parent == NULL) {
-+ rv = ERR_PTR(-EACCES);
-+ goto out;
-+ }
-+
-+ rv = d_alloc_anon(parent);
-+ if(rv == NULL)
-+ rv = ERR_PTR(-ENOMEM);
-+
-+out:
-+ return rv;
-+}
-+
-+
-+SQSH_EXTERN struct inode *squashfs_iget(struct super_block *s, squashfs_inode_t inode, unsigned int inode_number)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct inode *i = iget_locked(s, inode_number);
-+
-+ TRACE("Entered squashfs_iget\n");
-+
-+ if(i && (i->i_state & I_NEW)) {
-+ (msblk->read_inode)(i, inode);
-+ unlock_new_inode(i);
-+ }
-+
-+ return i;
-+}
-+
-+
-+static int squashfs_read_inode(struct inode *i, squashfs_inode_t inode)
-+{
-+ struct super_block *s = i->i_sb;
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long block = SQUASHFS_INODE_BLK(inode) +
-+ sblk->inode_table_start;
-+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
-+ long long next_block;
-+ unsigned int next_offset;
-+ union squashfs_inode_header id, sid;
-+ struct squashfs_base_inode_header *inodeb = &id.base,
-+ *sinodeb = &sid.base;
-+
-+ TRACE("Entered squashfs_read_inode\n");
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *) sinodeb, block,
-+ offset, sizeof(*sinodeb), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_BASE_INODE_HEADER(inodeb, sinodeb,
-+ sizeof(*sinodeb));
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *) inodeb, block,
-+ offset, sizeof(*inodeb), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ squashfs_new_inode(msblk, i, inodeb);
-+
-+ switch(inodeb->inode_type) {
-+ case SQUASHFS_FILE_TYPE: {
-+ unsigned int frag_size;
-+ long long frag_blk;
-+ struct squashfs_reg_inode_header *inodep = &id.reg;
-+ struct squashfs_reg_inode_header *sinodep = &sid.reg;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_REG_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ frag_blk = SQUASHFS_INVALID_BLK;
-+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
-+ !get_fragment_location(s,
-+ inodep->fragment, &frag_blk, &frag_size))
-+ goto failed_read;
-+
-+ i->i_nlink = 1;
-+ i->i_size = inodep->file_size;
-+ i->i_fop = &generic_ro_fops;
-+ i->i_mode |= S_IFREG;
-+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
-+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
-+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
-+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+ if (sblk->block_size > 4096)
-+ i->i_data.a_ops = &squashfs_aops;
-+ else
-+ i->i_data.a_ops = &squashfs_aops_4K;
-+
-+ TRACE("File inode %x:%x, start_block %llx, "
-+ "block_list_start %llx, offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, next_block,
-+ next_offset);
-+ break;
-+ }
-+ case SQUASHFS_LREG_TYPE: {
-+ unsigned int frag_size;
-+ long long frag_blk;
-+ struct squashfs_lreg_inode_header *inodep = &id.lreg;
-+ struct squashfs_lreg_inode_header *sinodep = &sid.lreg;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_LREG_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ frag_blk = SQUASHFS_INVALID_BLK;
-+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
-+ !get_fragment_location(s,
-+ inodep->fragment, &frag_blk, &frag_size))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_size = inodep->file_size;
-+ i->i_fop = &generic_ro_fops;
-+ i->i_mode |= S_IFREG;
-+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
-+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
-+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
-+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+ if (sblk->block_size > 4096)
-+ i->i_data.a_ops = &squashfs_aops;
-+ else
-+ i->i_data.a_ops = &squashfs_aops_4K;
-+
-+ TRACE("File inode %x:%x, start_block %llx, "
-+ "block_list_start %llx, offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, next_block,
-+ next_offset);
-+ break;
-+ }
-+ case SQUASHFS_DIR_TYPE: {
-+ struct squashfs_dir_inode_header *inodep = &id.dir;
-+ struct squashfs_dir_inode_header *sinodep = &sid.dir;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_DIR_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_size = inodep->file_size;
-+ i->i_op = &squashfs_dir_inode_ops;
-+ i->i_fop = &squashfs_dir_ops;
-+ i->i_mode |= S_IFDIR;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->offset = inodep->offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_count = 0;
-+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
-+
-+ TRACE("Directory inode %x:%x, start_block %x, offset "
-+ "%x\n", SQUASHFS_INODE_BLK(inode),
-+ offset, inodep->start_block,
-+ inodep->offset);
-+ break;
-+ }
-+ case SQUASHFS_LDIR_TYPE: {
-+ struct squashfs_ldir_inode_header *inodep = &id.ldir;
-+ struct squashfs_ldir_inode_header *sinodep = &sid.ldir;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_LDIR_INODE_HEADER(inodep,
-+ sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_size = inodep->file_size;
-+ i->i_op = &squashfs_dir_inode_ops;
-+ i->i_fop = &squashfs_dir_ops;
-+ i->i_mode |= S_IFDIR;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->offset = inodep->offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
-+ SQUASHFS_I(i)->u.s2.directory_index_offset =
-+ next_offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_count =
-+ inodep->i_count;
-+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
-+
-+ TRACE("Long directory inode %x:%x, start_block %x, "
-+ "offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, inodep->offset);
-+ break;
-+ }
-+ case SQUASHFS_SYMLINK_TYPE: {
-+ struct squashfs_symlink_inode_header *inodep =
-+ &id.symlink;
-+ struct squashfs_symlink_inode_header *sinodep =
-+ &sid.symlink;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER(inodep,
-+ sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_size = inodep->symlink_size;
-+ i->i_op = &page_symlink_inode_operations;
-+ i->i_data.a_ops = &squashfs_symlink_aops;
-+ i->i_mode |= S_IFLNK;
-+ SQUASHFS_I(i)->start_block = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+
-+ TRACE("Symbolic link inode %x:%x, start_block %llx, "
-+ "offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ next_block, next_offset);
-+ break;
-+ }
-+ case SQUASHFS_BLKDEV_TYPE:
-+ case SQUASHFS_CHRDEV_TYPE: {
-+ struct squashfs_dev_inode_header *inodep = &id.dev;
-+ struct squashfs_dev_inode_header *sinodep = &sid.dev;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_DEV_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_mode |= (inodeb->inode_type ==
-+ SQUASHFS_CHRDEV_TYPE) ? S_IFCHR :
-+ S_IFBLK;
-+ init_special_inode(i, i->i_mode,
-+ old_decode_dev(inodep->rdev));
-+
-+ TRACE("Device inode %x:%x, rdev %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->rdev);
-+ break;
-+ }
-+ case SQUASHFS_FIFO_TYPE:
-+ case SQUASHFS_SOCKET_TYPE: {
-+ struct squashfs_ipc_inode_header *inodep = &id.ipc;
-+ struct squashfs_ipc_inode_header *sinodep = &sid.ipc;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_IPC_INODE_HEADER(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_nlink = inodep->nlink;
-+ i->i_mode |= (inodeb->inode_type == SQUASHFS_FIFO_TYPE)
-+ ? S_IFIFO : S_IFSOCK;
-+ init_special_inode(i, i->i_mode, 0);
-+ break;
-+ }
-+ default:
-+ ERROR("Unknown inode type %d in squashfs_iget!\n",
-+ inodeb->inode_type);
-+ goto failed_read1;
-+ }
-+
-+ return 1;
-+
-+failed_read:
-+ ERROR("Unable to read inode [%llx:%x]\n", block, offset);
-+
-+failed_read1:
-+ make_bad_inode(i);
-+ return 0;
-+}
-+
-+
-+static int read_inode_lookup_table(struct super_block *s)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned int length = SQUASHFS_LOOKUP_BLOCK_BYTES(sblk->inodes);
-+
-+ TRACE("In read_inode_lookup_table, length %d\n", length);
-+
-+ /* Allocate inode lookup table */
-+ if (!(msblk->inode_lookup_table = kmalloc(length, GFP_KERNEL))) {
-+ ERROR("Failed to allocate inode lookup table\n");
-+ return 0;
-+ }
-+
-+ if (!squashfs_read_data(s, (char *) msblk->inode_lookup_table,
-+ sblk->lookup_table_start, length |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length)) {
-+ ERROR("unable to read inode lookup table\n");
-+ return 0;
-+ }
-+
-+ if (msblk->swap) {
-+ int i;
-+ long long block;
-+
-+ for (i = 0; i < SQUASHFS_LOOKUP_BLOCKS(sblk->inodes); i++) {
-+ SQUASHFS_SWAP_LOOKUP_BLOCKS((&block),
-+ &msblk->inode_lookup_table[i], 1);
-+ msblk->inode_lookup_table[i] = block;
-+ }
-+ }
-+
-+ return 1;
-+}
-+
-+
-+static int read_fragment_index_table(struct super_block *s)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned int length = SQUASHFS_FRAGMENT_INDEX_BYTES(sblk->fragments);
-+
-+ if(length == 0)
-+ return 1;
-+
-+ /* Allocate fragment index table */
-+ if (!(msblk->fragment_index = kmalloc(length, GFP_KERNEL))) {
-+ ERROR("Failed to allocate fragment index table\n");
-+ return 0;
-+ }
-+
-+ if (!squashfs_read_data(s, (char *) msblk->fragment_index,
-+ sblk->fragment_table_start, length |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length)) {
-+ ERROR("unable to read fragment index table\n");
-+ return 0;
-+ }
-+
-+ if (msblk->swap) {
-+ int i;
-+ long long fragment;
-+
-+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES(sblk->fragments); i++) {
-+ SQUASHFS_SWAP_FRAGMENT_INDEXES((&fragment),
-+ &msblk->fragment_index[i], 1);
-+ msblk->fragment_index[i] = fragment;
-+ }
-+ }
-+
-+ return 1;
-+}
-+
-+
-+static int supported_squashfs_filesystem(struct squashfs_sb_info *msblk, int silent)
-+{
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ msblk->read_inode = squashfs_read_inode;
-+ msblk->read_blocklist = read_blocklist;
-+ msblk->read_fragment_index_table = read_fragment_index_table;
-+
-+ if (sblk->s_major == 1) {
-+ if (!squashfs_1_0_supported(msblk)) {
-+ SERROR("Major/Minor mismatch, Squashfs 1.0 filesystems "
-+ "are unsupported\n");
-+ SERROR("Please recompile with "
-+ "Squashfs 1.0 support enabled\n");
-+ return 0;
-+ }
-+ } else if (sblk->s_major == 2) {
-+ if (!squashfs_2_0_supported(msblk)) {
-+ SERROR("Major/Minor mismatch, Squashfs 2.0 filesystems "
-+ "are unsupported\n");
-+ SERROR("Please recompile with "
-+ "Squashfs 2.0 support enabled\n");
-+ return 0;
-+ }
-+ } else if(sblk->s_major != SQUASHFS_MAJOR || sblk->s_minor >
-+ SQUASHFS_MINOR) {
-+ SERROR("Major/Minor mismatch, trying to mount newer %d.%d "
-+ "filesystem\n", sblk->s_major, sblk->s_minor);
-+ SERROR("Please update your kernel\n");
-+ return 0;
-+ }
-+
-+ return 1;
-+}
-+
-+
-+static int squashfs_fill_super(struct super_block *s, void *data, int silent)
-+{
-+ struct squashfs_sb_info *msblk;
-+ struct squashfs_super_block *sblk;
-+ int i;
-+ char b[BDEVNAME_SIZE];
-+ struct inode *root;
-+
-+ TRACE("Entered squashfs_read_superblock\n");
-+
-+ if (!(s->s_fs_info = kmalloc(sizeof(struct squashfs_sb_info),
-+ GFP_KERNEL))) {
-+ ERROR("Failed to allocate superblock\n");
-+ goto failure;
-+ }
-+ memset(s->s_fs_info, 0, sizeof(struct squashfs_sb_info));
-+ msblk = s->s_fs_info;
-+ if (!(msblk->stream.workspace = vmalloc(zlib_inflate_workspacesize()))) {
-+ ERROR("Failed to allocate zlib workspace\n");
-+ goto failure;
-+ }
-+ sblk = &msblk->sblk;
-+
-+ msblk->devblksize = sb_min_blocksize(s, BLOCK_SIZE);
-+ msblk->devblksize_log2 = ffz(~msblk->devblksize);
-+
-+ mutex_init(&msblk->read_data_mutex);
-+ mutex_init(&msblk->read_page_mutex);
-+ mutex_init(&msblk->block_cache_mutex);
-+ mutex_init(&msblk->fragment_mutex);
-+ mutex_init(&msblk->meta_index_mutex);
-+
-+ init_waitqueue_head(&msblk->waitq);
-+ init_waitqueue_head(&msblk->fragment_wait_queue);
-+
-+ sblk->bytes_used = sizeof(struct squashfs_super_block);
-+ if (!squashfs_read_data(s, (char *) sblk, SQUASHFS_START,
-+ sizeof(struct squashfs_super_block) |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, sizeof(struct squashfs_super_block))) {
-+ SERROR("unable to read superblock\n");
-+ goto failed_mount;
-+ }
-+
-+ /* Check it is a SQUASHFS superblock */
-+ msblk->swap = 0;
-+ if ((s->s_magic = sblk->s_magic) != SQUASHFS_MAGIC) {
-+ if (sblk->s_magic == SQUASHFS_MAGIC_SWAP) {
-+ struct squashfs_super_block ssblk;
-+
-+ WARNING("Mounting a different endian SQUASHFS "
-+ "filesystem on %s\n", bdevname(s->s_bdev, b));
-+
-+ SQUASHFS_SWAP_SUPER_BLOCK(&ssblk, sblk);
-+ memcpy(sblk, &ssblk, sizeof(struct squashfs_super_block));
-+ msblk->swap = 1;
-+ } else {
-+ SERROR("Can't find a SQUASHFS superblock on %s\n",
-+ bdevname(s->s_bdev, b));
-+ goto failed_mount;
-+ }
-+ }
-+
-+ /* Check the MAJOR & MINOR versions */
-+ if(!supported_squashfs_filesystem(msblk, silent))
-+ goto failed_mount;
-+
-+ /* Check the filesystem does not extend beyond the end of the
-+ block device */
-+ if(sblk->bytes_used < 0 || sblk->bytes_used > i_size_read(s->s_bdev->bd_inode))
-+ goto failed_mount;
-+
-+ /* Check the root inode for sanity */
-+ if (SQUASHFS_INODE_OFFSET(sblk->root_inode) > SQUASHFS_METADATA_SIZE)
-+ goto failed_mount;
-+
-+ TRACE("Found valid superblock on %s\n", bdevname(s->s_bdev, b));
-+ TRACE("Inodes are %scompressed\n",
-+ SQUASHFS_UNCOMPRESSED_INODES
-+ (sblk->flags) ? "un" : "");
-+ TRACE("Data is %scompressed\n",
-+ SQUASHFS_UNCOMPRESSED_DATA(sblk->flags)
-+ ? "un" : "");
-+ TRACE("Check data is %s present in the filesystem\n",
-+ SQUASHFS_CHECK_DATA(sblk->flags) ?
-+ "" : "not");
-+ TRACE("Filesystem size %lld bytes\n", sblk->bytes_used);
-+ TRACE("Block size %d\n", sblk->block_size);
-+ TRACE("Number of inodes %d\n", sblk->inodes);
-+ if (sblk->s_major > 1)
-+ TRACE("Number of fragments %d\n", sblk->fragments);
-+ TRACE("Number of uids %d\n", sblk->no_uids);
-+ TRACE("Number of gids %d\n", sblk->no_guids);
-+ TRACE("sblk->inode_table_start %llx\n", sblk->inode_table_start);
-+ TRACE("sblk->directory_table_start %llx\n", sblk->directory_table_start);
-+ if (sblk->s_major > 1)
-+ TRACE("sblk->fragment_table_start %llx\n",
-+ sblk->fragment_table_start);
-+ TRACE("sblk->uid_start %llx\n", sblk->uid_start);
-+
-+ s->s_flags |= MS_RDONLY;
-+ s->s_op = &squashfs_super_ops;
-+
-+ /* Init inode_table block pointer array */
-+ if (!(msblk->block_cache = kmalloc(sizeof(struct squashfs_cache) *
-+ SQUASHFS_CACHED_BLKS, GFP_KERNEL))) {
-+ ERROR("Failed to allocate block cache\n");
-+ goto failed_mount;
-+ }
-+
-+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
-+ msblk->block_cache[i].block = SQUASHFS_INVALID_BLK;
-+
-+ msblk->next_cache = 0;
-+
-+ /* Allocate read_page block */
-+ if (!(msblk->read_page = kmalloc(sblk->block_size, GFP_KERNEL))) {
-+ ERROR("Failed to allocate read_page block\n");
-+ goto failed_mount;
-+ }
-+
-+ /* Allocate uid and gid tables */
-+ if (!(msblk->uid = kmalloc((sblk->no_uids + sblk->no_guids) *
-+ sizeof(unsigned int), GFP_KERNEL))) {
-+ ERROR("Failed to allocate uid/gid table\n");
-+ goto failed_mount;
-+ }
-+ msblk->guid = msblk->uid + sblk->no_uids;
-+
-+ if (msblk->swap) {
-+ unsigned int suid[sblk->no_uids + sblk->no_guids];
-+
-+ if (!squashfs_read_data(s, (char *) &suid, sblk->uid_start,
-+ ((sblk->no_uids + sblk->no_guids) *
-+ sizeof(unsigned int)) |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, (sblk->no_uids + sblk->no_guids) * sizeof(unsigned int))) {
-+ ERROR("unable to read uid/gid table\n");
-+ goto failed_mount;
-+ }
-+
-+ SQUASHFS_SWAP_DATA(msblk->uid, suid, (sblk->no_uids +
-+ sblk->no_guids), (sizeof(unsigned int) * 8));
-+ } else
-+ if (!squashfs_read_data(s, (char *) msblk->uid, sblk->uid_start,
-+ ((sblk->no_uids + sblk->no_guids) *
-+ sizeof(unsigned int)) |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, (sblk->no_uids + sblk->no_guids) * sizeof(unsigned int))) {
-+ ERROR("unable to read uid/gid table\n");
-+ goto failed_mount;
-+ }
-+
-+
-+ if (sblk->s_major == 1 && squashfs_1_0_supported(msblk))
-+ goto allocate_root;
-+
-+ if (!(msblk->fragment = kmalloc(sizeof(struct squashfs_fragment_cache) *
-+ SQUASHFS_CACHED_FRAGMENTS, GFP_KERNEL))) {
-+ ERROR("Failed to allocate fragment block cache\n");
-+ goto failed_mount;
-+ }
-+
-+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++) {
-+ msblk->fragment[i].locked = 0;
-+ msblk->fragment[i].block = SQUASHFS_INVALID_BLK;
-+ msblk->fragment[i].data = NULL;
-+ }
-+
-+ msblk->next_fragment = 0;
-+
-+ /* Allocate and read fragment index table */
-+ if (msblk->read_fragment_index_table(s) == 0)
-+ goto failed_mount;
-+
-+ if(sblk->s_major < 3 || sblk->lookup_table_start == SQUASHFS_INVALID_BLK)
-+ goto allocate_root;
-+
-+ /* Allocate and read inode lookup table */
-+ if (read_inode_lookup_table(s) == 0)
-+ goto failed_mount;
-+
-+ s->s_op = &squashfs_export_super_ops;
-+ s->s_export_op = &squashfs_export_ops;
-+
-+allocate_root:
-+ root = new_inode(s);
-+ if ((msblk->read_inode)(root, sblk->root_inode) == 0)
-+ goto failed_mount;
-+ insert_inode_hash(root);
-+
-+ if ((s->s_root = d_alloc_root(root)) == NULL) {
-+ ERROR("Root inode create failed\n");
-+ iput(root);
-+ goto failed_mount;
-+ }
-+
-+ TRACE("Leaving squashfs_read_super\n");
-+ return 0;
-+
-+failed_mount:
-+ kfree(msblk->inode_lookup_table);
-+ kfree(msblk->fragment_index);
-+ kfree(msblk->fragment);
-+ kfree(msblk->uid);
-+ kfree(msblk->read_page);
-+ kfree(msblk->block_cache);
-+ kfree(msblk->fragment_index_2);
-+ vfree(msblk->stream.workspace);
-+ kfree(s->s_fs_info);
-+ s->s_fs_info = NULL;
-+ return -EINVAL;
-+
-+failure:
-+ return -ENOMEM;
-+}
-+
-+
-+static int squashfs_statfs(struct dentry *dentry, struct kstatfs *buf)
-+{
-+ struct squashfs_sb_info *msblk = dentry->d_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ TRACE("Entered squashfs_statfs\n");
-+
-+ buf->f_type = SQUASHFS_MAGIC;
-+ buf->f_bsize = sblk->block_size;
-+ buf->f_blocks = ((sblk->bytes_used - 1) >> sblk->block_log) + 1;
-+ buf->f_bfree = buf->f_bavail = 0;
-+ buf->f_files = sblk->inodes;
-+ buf->f_ffree = 0;
-+ buf->f_namelen = SQUASHFS_NAME_LEN;
-+
-+ return 0;
-+}
-+
-+
-+static int squashfs_symlink_readpage(struct file *file, struct page *page)
-+{
-+ struct inode *inode = page->mapping->host;
-+ int index = page->index << PAGE_CACHE_SHIFT, length, bytes;
-+ long long block = SQUASHFS_I(inode)->start_block;
-+ int offset = SQUASHFS_I(inode)->offset;
-+ void *pageaddr = kmap(page);
-+
-+ TRACE("Entered squashfs_symlink_readpage, page index %ld, start block "
-+ "%llx, offset %x\n", page->index,
-+ SQUASHFS_I(inode)->start_block,
-+ SQUASHFS_I(inode)->offset);
-+
-+ for (length = 0; length < index; length += bytes) {
-+ if (!(bytes = squashfs_get_cached_block(inode->i_sb, NULL,
-+ block, offset, PAGE_CACHE_SIZE, &block,
-+ &offset))) {
-+ ERROR("Unable to read symbolic link [%llx:%x]\n", block,
-+ offset);
-+ goto skip_read;
-+ }
-+ }
-+
-+ if (length != index) {
-+ ERROR("(squashfs_symlink_readpage) length != index\n");
-+ bytes = 0;
-+ goto skip_read;
-+ }
-+
-+ bytes = (i_size_read(inode) - length) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE :
-+ i_size_read(inode) - length;
-+
-+ if (!(bytes = squashfs_get_cached_block(inode->i_sb, pageaddr, block,
-+ offset, bytes, &block, &offset)))
-+ ERROR("Unable to read symbolic link [%llx:%x]\n", block, offset);
-+
-+skip_read:
-+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
-+ kunmap(page);
-+ flush_dcache_page(page);
-+ SetPageUptodate(page);
-+ unlock_page(page);
-+
-+ return 0;
-+}
-+
-+
-+struct meta_index *locate_meta_index(struct inode *inode, int index, int offset)
-+{
-+ struct meta_index *meta = NULL;
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ int i;
-+
-+ mutex_lock(&msblk->meta_index_mutex);
-+
-+ TRACE("locate_meta_index: index %d, offset %d\n", index, offset);
-+
-+ if(msblk->meta_index == NULL)
-+ goto not_allocated;
-+
-+ for (i = 0; i < SQUASHFS_META_NUMBER; i ++)
-+ if (msblk->meta_index[i].inode_number == inode->i_ino &&
-+ msblk->meta_index[i].offset >= offset &&
-+ msblk->meta_index[i].offset <= index &&
-+ msblk->meta_index[i].locked == 0) {
-+ TRACE("locate_meta_index: entry %d, offset %d\n", i,
-+ msblk->meta_index[i].offset);
-+ meta = &msblk->meta_index[i];
-+ offset = meta->offset;
-+ }
-+
-+ if (meta)
-+ meta->locked = 1;
-+
-+not_allocated:
-+ mutex_unlock(&msblk->meta_index_mutex);
-+
-+ return meta;
-+}
-+
-+
-+struct meta_index *empty_meta_index(struct inode *inode, int offset, int skip)
-+{
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ struct meta_index *meta = NULL;
-+ int i;
-+
-+ mutex_lock(&msblk->meta_index_mutex);
-+
-+ TRACE("empty_meta_index: offset %d, skip %d\n", offset, skip);
-+
-+ if(msblk->meta_index == NULL) {
-+ if (!(msblk->meta_index = kmalloc(sizeof(struct meta_index) *
-+ SQUASHFS_META_NUMBER, GFP_KERNEL))) {
-+ ERROR("Failed to allocate meta_index\n");
-+ goto failed;
-+ }
-+ for(i = 0; i < SQUASHFS_META_NUMBER; i++) {
-+ msblk->meta_index[i].inode_number = 0;
-+ msblk->meta_index[i].locked = 0;
-+ }
-+ msblk->next_meta_index = 0;
-+ }
-+
-+ for(i = SQUASHFS_META_NUMBER; i &&
-+ msblk->meta_index[msblk->next_meta_index].locked; i --)
-+ msblk->next_meta_index = (msblk->next_meta_index + 1) %
-+ SQUASHFS_META_NUMBER;
-+
-+ if(i == 0) {
-+ TRACE("empty_meta_index: failed!\n");
-+ goto failed;
-+ }
-+
-+ TRACE("empty_meta_index: returned meta entry %d, %p\n",
-+ msblk->next_meta_index,
-+ &msblk->meta_index[msblk->next_meta_index]);
-+
-+ meta = &msblk->meta_index[msblk->next_meta_index];
-+ msblk->next_meta_index = (msblk->next_meta_index + 1) %
-+ SQUASHFS_META_NUMBER;
-+
-+ meta->inode_number = inode->i_ino;
-+ meta->offset = offset;
-+ meta->skip = skip;
-+ meta->entries = 0;
-+ meta->locked = 1;
-+
-+failed:
-+ mutex_unlock(&msblk->meta_index_mutex);
-+ return meta;
-+}
-+
-+
-+void release_meta_index(struct inode *inode, struct meta_index *meta)
-+{
-+ meta->locked = 0;
-+ smp_mb();
-+}
-+
-+
-+static int read_block_index(struct super_block *s, int blocks, char *block_list,
-+ long long *start_block, int *offset)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ unsigned int *block_listp;
-+ int block = 0;
-+
-+ if (msblk->swap) {
-+ char sblock_list[blocks << 2];
-+
-+ if (!squashfs_get_cached_block(s, sblock_list, *start_block,
-+ *offset, blocks << 2, start_block, offset)) {
-+ ERROR("Unable to read block list [%llx:%x]\n",
-+ *start_block, *offset);
-+ goto failure;
-+ }
-+ SQUASHFS_SWAP_INTS(((unsigned int *)block_list),
-+ ((unsigned int *)sblock_list), blocks);
-+ } else
-+ if (!squashfs_get_cached_block(s, block_list, *start_block,
-+ *offset, blocks << 2, start_block, offset)) {
-+ ERROR("Unable to read block list [%llx:%x]\n",
-+ *start_block, *offset);
-+ goto failure;
-+ }
-+
-+ for (block_listp = (unsigned int *) block_list; blocks;
-+ block_listp++, blocks --)
-+ block += SQUASHFS_COMPRESSED_SIZE_BLOCK(*block_listp);
-+
-+ return block;
-+
-+failure:
-+ return -1;
-+}
-+
-+
-+#define SIZE 256
-+
-+static inline int calculate_skip(int blocks) {
-+ int skip = (blocks - 1) / ((SQUASHFS_SLOTS * SQUASHFS_META_ENTRIES + 1) * SQUASHFS_META_INDEXES);
-+ return skip >= 7 ? 7 : skip + 1;
-+}
-+
-+
-+static int get_meta_index(struct inode *inode, int index,
-+ long long *index_block, int *index_offset,
-+ long long *data_block, char *block_list)
-+{
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int skip = calculate_skip(i_size_read(inode) >> sblk->block_log);
-+ int offset = 0;
-+ struct meta_index *meta;
-+ struct meta_entry *meta_entry;
-+ long long cur_index_block = SQUASHFS_I(inode)->u.s1.block_list_start;
-+ int cur_offset = SQUASHFS_I(inode)->offset;
-+ long long cur_data_block = SQUASHFS_I(inode)->start_block;
-+ int i;
-+
-+ index /= SQUASHFS_META_INDEXES * skip;
-+
-+ while ( offset < index ) {
-+ meta = locate_meta_index(inode, index, offset + 1);
-+
-+ if (meta == NULL) {
-+ if ((meta = empty_meta_index(inode, offset + 1,
-+ skip)) == NULL)
-+ goto all_done;
-+ } else {
-+ if(meta->entries == 0)
-+ goto failed;
-+ offset = index < meta->offset + meta->entries ? index :
-+ meta->offset + meta->entries - 1;
-+ meta_entry = &meta->meta_entry[offset - meta->offset];
-+ cur_index_block = meta_entry->index_block + sblk->inode_table_start;
-+ cur_offset = meta_entry->offset;
-+ cur_data_block = meta_entry->data_block;
-+ TRACE("get_meta_index: offset %d, meta->offset %d, "
-+ "meta->entries %d\n", offset, meta->offset,
-+ meta->entries);
-+ TRACE("get_meta_index: index_block 0x%llx, offset 0x%x"
-+ " data_block 0x%llx\n", cur_index_block,
-+ cur_offset, cur_data_block);
-+ }
-+
-+ for (i = meta->offset + meta->entries; i <= index &&
-+ i < meta->offset + SQUASHFS_META_ENTRIES; i++) {
-+ int blocks = skip * SQUASHFS_META_INDEXES;
-+
-+ while (blocks) {
-+ int block = blocks > (SIZE >> 2) ? (SIZE >> 2) :
-+ blocks;
-+ int res = read_block_index(inode->i_sb, block,
-+ block_list, &cur_index_block,
-+ &cur_offset);
-+
-+ if (res == -1)
-+ goto failed;
-+
-+ cur_data_block += res;
-+ blocks -= block;
-+ }
-+
-+ meta_entry = &meta->meta_entry[i - meta->offset];
-+ meta_entry->index_block = cur_index_block - sblk->inode_table_start;
-+ meta_entry->offset = cur_offset;
-+ meta_entry->data_block = cur_data_block;
-+ meta->entries ++;
-+ offset ++;
-+ }
-+
-+ TRACE("get_meta_index: meta->offset %d, meta->entries %d\n",
-+ meta->offset, meta->entries);
-+
-+ release_meta_index(inode, meta);
-+ }
-+
-+all_done:
-+ *index_block = cur_index_block;
-+ *index_offset = cur_offset;
-+ *data_block = cur_data_block;
-+
-+ return offset * SQUASHFS_META_INDEXES * skip;
-+
-+failed:
-+ release_meta_index(inode, meta);
-+ return -1;
-+}
-+
-+
-+static long long read_blocklist(struct inode *inode, int index,
-+ int readahead_blks, char *block_list,
-+ unsigned short **block_p, unsigned int *bsize)
-+{
-+ long long block_ptr;
-+ int offset;
-+ long long block;
-+ int res = get_meta_index(inode, index, &block_ptr, &offset, &block,
-+ block_list);
-+
-+ TRACE("read_blocklist: res %d, index %d, block_ptr 0x%llx, offset"
-+ " 0x%x, block 0x%llx\n", res, index, block_ptr, offset,
-+ block);
-+
-+ if(res == -1)
-+ goto failure;
-+
-+ index -= res;
-+
-+ while ( index ) {
-+ int blocks = index > (SIZE >> 2) ? (SIZE >> 2) : index;
-+ int res = read_block_index(inode->i_sb, blocks, block_list,
-+ &block_ptr, &offset);
-+ if (res == -1)
-+ goto failure;
-+ block += res;
-+ index -= blocks;
-+ }
-+
-+ if (read_block_index(inode->i_sb, 1, block_list,
-+ &block_ptr, &offset) == -1)
-+ goto failure;
-+ *bsize = *((unsigned int *) block_list);
-+
-+ return block;
-+
-+failure:
-+ return 0;
-+}
-+
-+
-+static int squashfs_readpage(struct file *file, struct page *page)
-+{
-+ struct inode *inode = page->mapping->host;
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned char *block_list;
-+ long long block;
-+ unsigned int bsize, i = 0, bytes = 0, byte_offset = 0;
-+ int index = page->index >> (sblk->block_log - PAGE_CACHE_SHIFT);
-+ void *pageaddr;
-+ struct squashfs_fragment_cache *fragment = NULL;
-+ char *data_ptr = msblk->read_page;
-+
-+ int mask = (1 << (sblk->block_log - PAGE_CACHE_SHIFT)) - 1;
-+ int start_index = page->index & ~mask;
-+ int end_index = start_index | mask;
-+
-+ TRACE("Entered squashfs_readpage, page index %lx, start block %llx\n",
-+ page->index,
-+ SQUASHFS_I(inode)->start_block);
-+
-+ if (!(block_list = kmalloc(SIZE, GFP_KERNEL))) {
-+ ERROR("Failed to allocate block_list\n");
-+ goto skip_read;
-+ }
-+
-+ if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
-+ PAGE_CACHE_SHIFT))
-+ goto skip_read;
-+
-+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
-+ || index < (i_size_read(inode) >>
-+ sblk->block_log)) {
-+ if ((block = (msblk->read_blocklist)(inode, index, 1,
-+ block_list, NULL, &bsize)) == 0)
-+ goto skip_read;
-+
-+ mutex_lock(&msblk->read_page_mutex);
-+
-+ if (!(bytes = squashfs_read_data(inode->i_sb, msblk->read_page,
-+ block, bsize, NULL, sblk->block_size))) {
-+ ERROR("Unable to read page, block %llx, size %x\n", block,
-+ bsize);
-+ mutex_unlock(&msblk->read_page_mutex);
-+ goto skip_read;
-+ }
-+ } else {
-+ if ((fragment = get_cached_fragment(inode->i_sb,
-+ SQUASHFS_I(inode)->
-+ u.s1.fragment_start_block,
-+ SQUASHFS_I(inode)->u.s1.fragment_size))
-+ == NULL) {
-+ ERROR("Unable to read page, block %llx, size %x\n",
-+ SQUASHFS_I(inode)->
-+ u.s1.fragment_start_block,
-+ (int) SQUASHFS_I(inode)->
-+ u.s1.fragment_size);
-+ goto skip_read;
-+ }
-+ bytes = SQUASHFS_I(inode)->u.s1.fragment_offset +
-+ (i_size_read(inode) & (sblk->block_size
-+ - 1));
-+ byte_offset = SQUASHFS_I(inode)->u.s1.fragment_offset;
-+ data_ptr = fragment->data;
-+ }
-+
-+ for (i = start_index; i <= end_index && byte_offset < bytes;
-+ i++, byte_offset += PAGE_CACHE_SIZE) {
-+ struct page *push_page;
-+ int avail = (bytes - byte_offset) > PAGE_CACHE_SIZE ?
-+ PAGE_CACHE_SIZE : bytes - byte_offset;
-+
-+ TRACE("bytes %d, i %d, byte_offset %d, available_bytes %d\n",
-+ bytes, i, byte_offset, avail);
-+
-+ push_page = (i == page->index) ? page :
-+ grab_cache_page_nowait(page->mapping, i);
-+
-+ if (!push_page)
-+ continue;
-+
-+ if (PageUptodate(push_page))
-+ goto skip_page;
-+
-+ pageaddr = kmap_atomic(push_page, KM_USER0);
-+ memcpy(pageaddr, data_ptr + byte_offset, avail);
-+ memset(pageaddr + avail, 0, PAGE_CACHE_SIZE - avail);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ flush_dcache_page(push_page);
-+ SetPageUptodate(push_page);
-+skip_page:
-+ unlock_page(push_page);
-+ if(i != page->index)
-+ page_cache_release(push_page);
-+ }
-+
-+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
-+ || index < (i_size_read(inode) >>
-+ sblk->block_log))
-+ mutex_unlock(&msblk->read_page_mutex);
-+ else
-+ release_cached_fragment(msblk, fragment);
-+
-+ kfree(block_list);
-+ return 0;
-+
-+skip_read:
-+ pageaddr = kmap_atomic(page, KM_USER0);
-+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ flush_dcache_page(page);
-+ SetPageUptodate(page);
-+ unlock_page(page);
-+
-+ kfree(block_list);
-+ return 0;
-+}
-+
-+
-+static int squashfs_readpage4K(struct file *file, struct page *page)
-+{
-+ struct inode *inode = page->mapping->host;
-+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned char *block_list;
-+ long long block;
-+ unsigned int bsize, bytes = 0;
-+ void *pageaddr;
-+
-+ TRACE("Entered squashfs_readpage4K, page index %lx, start block %llx\n",
-+ page->index,
-+ SQUASHFS_I(inode)->start_block);
-+
-+ if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
-+ PAGE_CACHE_SHIFT)) {
-+ block_list = NULL;
-+ goto skip_read;
-+ }
-+
-+ if (!(block_list = kmalloc(SIZE, GFP_KERNEL))) {
-+ ERROR("Failed to allocate block_list\n");
-+ goto skip_read;
-+ }
-+
-+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
-+ || page->index < (i_size_read(inode) >>
-+ sblk->block_log)) {
-+ block = (msblk->read_blocklist)(inode, page->index, 1,
-+ block_list, NULL, &bsize);
-+ if(block == 0)
-+ goto skip_read;
-+
-+ mutex_lock(&msblk->read_page_mutex);
-+ bytes = squashfs_read_data(inode->i_sb, msblk->read_page, block,
-+ bsize, NULL, sblk->block_size);
-+ if (bytes) {
-+ pageaddr = kmap_atomic(page, KM_USER0);
-+ memcpy(pageaddr, msblk->read_page, bytes);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ } else
-+ ERROR("Unable to read page, block %llx, size %x\n",
-+ block, bsize);
-+ mutex_unlock(&msblk->read_page_mutex);
-+ } else {
-+ struct squashfs_fragment_cache *fragment =
-+ get_cached_fragment(inode->i_sb,
-+ SQUASHFS_I(inode)->
-+ u.s1.fragment_start_block,
-+ SQUASHFS_I(inode)-> u.s1.fragment_size);
-+ if (fragment) {
-+ bytes = i_size_read(inode) & (sblk->block_size - 1);
-+ pageaddr = kmap_atomic(page, KM_USER0);
-+ memcpy(pageaddr, fragment->data + SQUASHFS_I(inode)->
-+ u.s1.fragment_offset, bytes);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ release_cached_fragment(msblk, fragment);
-+ } else
-+ ERROR("Unable to read page, block %llx, size %x\n",
-+ SQUASHFS_I(inode)->
-+ u.s1.fragment_start_block, (int)
-+ SQUASHFS_I(inode)-> u.s1.fragment_size);
-+ }
-+
-+skip_read:
-+ pageaddr = kmap_atomic(page, KM_USER0);
-+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
-+ kunmap_atomic(pageaddr, KM_USER0);
-+ flush_dcache_page(page);
-+ SetPageUptodate(page);
-+ unlock_page(page);
-+
-+ kfree(block_list);
-+ return 0;
-+}
-+
-+
-+static int get_dir_index_using_offset(struct super_block *s, long long
-+ *next_block, unsigned int *next_offset,
-+ long long index_start,
-+ unsigned int index_offset, int i_count,
-+ long long f_pos)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int i, length = 0;
-+ struct squashfs_dir_index index;
-+
-+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n",
-+ i_count, (unsigned int) f_pos);
-+
-+ f_pos =- 3;
-+ if (f_pos == 0)
-+ goto finish;
-+
-+ for (i = 0; i < i_count; i++) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_index sindex;
-+ squashfs_get_cached_block(s, (char *) &sindex,
-+ index_start, index_offset,
-+ sizeof(sindex), &index_start,
-+ &index_offset);
-+ SQUASHFS_SWAP_DIR_INDEX(&index, &sindex);
-+ } else
-+ squashfs_get_cached_block(s, (char *) &index,
-+ index_start, index_offset,
-+ sizeof(index), &index_start,
-+ &index_offset);
-+
-+ if (index.index > f_pos)
-+ break;
-+
-+ squashfs_get_cached_block(s, NULL, index_start, index_offset,
-+ index.size + 1, &index_start,
-+ &index_offset);
-+
-+ length = index.index;
-+ *next_block = index.start_block + sblk->directory_table_start;
-+ }
-+
-+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
-+
-+finish:
-+ return length + 3;
-+}
-+
-+
-+static int get_dir_index_using_name(struct super_block *s, long long
-+ *next_block, unsigned int *next_offset,
-+ long long index_start,
-+ unsigned int index_offset, int i_count,
-+ const char *name, int size)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int i, length = 0;
-+ struct squashfs_dir_index *index;
-+ char *str;
-+
-+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
-+
-+ if (!(str = kmalloc(sizeof(struct squashfs_dir_index) +
-+ (SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_index\n");
-+ goto failure;
-+ }
-+
-+ index = (struct squashfs_dir_index *) (str + SQUASHFS_NAME_LEN + 1);
-+ strncpy(str, name, size);
-+ str[size] = '\0';
-+
-+ for (i = 0; i < i_count; i++) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_index sindex;
-+ squashfs_get_cached_block(s, (char *) &sindex,
-+ index_start, index_offset,
-+ sizeof(sindex), &index_start,
-+ &index_offset);
-+ SQUASHFS_SWAP_DIR_INDEX(index, &sindex);
-+ } else
-+ squashfs_get_cached_block(s, (char *) index,
-+ index_start, index_offset,
-+ sizeof(struct squashfs_dir_index),
-+ &index_start, &index_offset);
-+
-+ squashfs_get_cached_block(s, index->name, index_start,
-+ index_offset, index->size + 1,
-+ &index_start, &index_offset);
-+
-+ index->name[index->size + 1] = '\0';
-+
-+ if (strcmp(index->name, str) > 0)
-+ break;
-+
-+ length = index->index;
-+ *next_block = index->start_block + sblk->directory_table_start;
-+ }
-+
-+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
-+ kfree(str);
-+failure:
-+ return length + 3;
-+}
-+
-+
-+static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir)
-+{
-+ struct inode *i = file->f_dentry->d_inode;
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long next_block = SQUASHFS_I(i)->start_block +
-+ sblk->directory_table_start;
-+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
-+ dir_count;
-+ struct squashfs_dir_header dirh;
-+ struct squashfs_dir_entry *dire;
-+
-+ TRACE("Entered squashfs_readdir [%llx:%x]\n", next_block, next_offset);
-+
-+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
-+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_entry\n");
-+ goto finish;
-+ }
-+
-+ while(file->f_pos < 3) {
-+ char *name;
-+ int size, i_ino;
-+
-+ if(file->f_pos == 0) {
-+ name = ".";
-+ size = 1;
-+ i_ino = i->i_ino;
-+ } else {
-+ name = "..";
-+ size = 2;
-+ i_ino = SQUASHFS_I(i)->u.s2.parent_inode;
-+ }
-+ TRACE("Calling filldir(%x, %s, %d, %d, %d, %d)\n",
-+ (unsigned int) dirent, name, size, (int)
-+ file->f_pos, i_ino,
-+ squashfs_filetype_table[1]);
-+
-+ if (filldir(dirent, name, size,
-+ file->f_pos, i_ino,
-+ squashfs_filetype_table[1]) < 0) {
-+ TRACE("Filldir returned less than 0\n");
-+ goto finish;
-+ }
-+ file->f_pos += size;
-+ }
-+
-+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_start,
-+ SQUASHFS_I(i)->u.s2.directory_index_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_count,
-+ file->f_pos);
-+
-+ while (length < i_size_read(i)) {
-+ /* read directory header */
-+ if (msblk->swap) {
-+ struct squashfs_dir_header sdirh;
-+
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
-+ next_block, next_offset, sizeof(sdirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdirh);
-+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
-+ next_block, next_offset, sizeof(dirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(dirh);
-+ }
-+
-+ dir_count = dirh.count + 1;
-+ while (dir_count--) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_entry sdire;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ &sdire, next_block, next_offset,
-+ sizeof(sdire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdire);
-+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ dire, next_block, next_offset,
-+ sizeof(*dire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(*dire);
-+ }
-+
-+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
-+ next_block, next_offset,
-+ dire->size + 1, &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += dire->size + 1;
-+
-+ if (file->f_pos >= length)
-+ continue;
-+
-+ dire->name[dire->size + 1] = '\0';
-+
-+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d, %d)\n",
-+ (unsigned int) dirent, dire->name,
-+ dire->size + 1, (int) file->f_pos,
-+ dirh.start_block, dire->offset,
-+ dirh.inode_number + dire->inode_number,
-+ squashfs_filetype_table[dire->type]);
-+
-+ if (filldir(dirent, dire->name, dire->size + 1,
-+ file->f_pos,
-+ dirh.inode_number + dire->inode_number,
-+ squashfs_filetype_table[dire->type])
-+ < 0) {
-+ TRACE("Filldir returned less than 0\n");
-+ goto finish;
-+ }
-+ file->f_pos = length;
-+ }
-+ }
-+
-+finish:
-+ kfree(dire);
-+ return 0;
-+
-+failed_read:
-+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
-+ next_offset);
-+ kfree(dire);
-+ return 0;
-+}
-+
-+
-+static struct dentry *squashfs_lookup(struct inode *i, struct dentry *dentry,
-+ struct nameidata *nd)
-+{
-+ const unsigned char *name = dentry->d_name.name;
-+ int len = dentry->d_name.len;
-+ struct inode *inode = NULL;
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long next_block = SQUASHFS_I(i)->start_block +
-+ sblk->directory_table_start;
-+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
-+ dir_count;
-+ struct squashfs_dir_header dirh;
-+ struct squashfs_dir_entry *dire;
-+
-+ TRACE("Entered squashfs_lookup [%llx:%x]\n", next_block, next_offset);
-+
-+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
-+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_entry\n");
-+ goto exit_lookup;
-+ }
-+
-+ if (len > SQUASHFS_NAME_LEN)
-+ goto exit_lookup;
-+
-+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_start,
-+ SQUASHFS_I(i)->u.s2.directory_index_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_count, name,
-+ len);
-+
-+ while (length < i_size_read(i)) {
-+ /* read directory header */
-+ if (msblk->swap) {
-+ struct squashfs_dir_header sdirh;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
-+ next_block, next_offset, sizeof(sdirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdirh);
-+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
-+ next_block, next_offset, sizeof(dirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(dirh);
-+ }
-+
-+ dir_count = dirh.count + 1;
-+ while (dir_count--) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_entry sdire;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ &sdire, next_block,next_offset,
-+ sizeof(sdire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdire);
-+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ dire, next_block,next_offset,
-+ sizeof(*dire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(*dire);
-+ }
-+
-+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
-+ next_block, next_offset, dire->size + 1,
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += dire->size + 1;
-+
-+ if (name[0] < dire->name[0])
-+ goto exit_lookup;
-+
-+ if ((len == dire->size + 1) && !strncmp(name, dire->name, len)) {
-+ squashfs_inode_t ino = SQUASHFS_MKINODE(dirh.start_block,
-+ dire->offset);
-+
-+ TRACE("calling squashfs_iget for directory "
-+ "entry %s, inode %x:%x, %d\n", name,
-+ dirh.start_block, dire->offset,
-+ dirh.inode_number + dire->inode_number);
-+
-+ inode = squashfs_iget(i->i_sb, ino, dirh.inode_number + dire->inode_number);
-+
-+ goto exit_lookup;
-+ }
-+ }
-+ }
-+
-+exit_lookup:
-+ kfree(dire);
-+ if (inode)
-+ return d_splice_alias(inode, dentry);
-+ d_add(dentry, inode);
-+ return ERR_PTR(0);
-+
-+failed_read:
-+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
-+ next_offset);
-+ goto exit_lookup;
-+}
-+
-+
-+static int squashfs_remount(struct super_block *s, int *flags, char *data)
-+{
-+ *flags |= MS_RDONLY;
-+ return 0;
-+}
-+
-+
-+static void squashfs_put_super(struct super_block *s)
-+{
-+ int i;
-+
-+ if (s->s_fs_info) {
-+ struct squashfs_sb_info *sbi = s->s_fs_info;
-+ if (sbi->block_cache)
-+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
-+ if (sbi->block_cache[i].block !=
-+ SQUASHFS_INVALID_BLK)
-+ kfree(sbi->block_cache[i].data);
-+ if (sbi->fragment)
-+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++)
-+ SQUASHFS_FREE(sbi->fragment[i].data);
-+ kfree(sbi->fragment);
-+ kfree(sbi->block_cache);
-+ kfree(sbi->read_page);
-+ kfree(sbi->uid);
-+ kfree(sbi->fragment_index);
-+ kfree(sbi->fragment_index_2);
-+ kfree(sbi->meta_index);
-+ vfree(sbi->stream.workspace);
-+ kfree(s->s_fs_info);
-+ s->s_fs_info = NULL;
-+ }
-+}
-+
-+
-+static int squashfs_get_sb(struct file_system_type *fs_type, int flags,
-+ const char *dev_name, void *data,
-+ struct vfsmount *mnt)
-+{
-+ return get_sb_bdev(fs_type, flags, dev_name, data, squashfs_fill_super,
-+ mnt);
-+}
-+
-+
-+static int __init init_squashfs_fs(void)
-+{
-+ int err = init_inodecache();
-+ if (err)
-+ goto out;
-+
-+ printk(KERN_INFO "squashfs: version 3.2-r2 (2007/01/15) "
-+ "Phillip Lougher\n");
-+
-+ if ((err = register_filesystem(&squashfs_fs_type)))
-+ destroy_inodecache();
-+
-+out:
-+ return err;
-+}
-+
-+
-+static void __exit exit_squashfs_fs(void)
-+{
-+ unregister_filesystem(&squashfs_fs_type);
-+ destroy_inodecache();
-+}
-+
-+
-+static struct kmem_cache * squashfs_inode_cachep;
-+
-+
-+static struct inode *squashfs_alloc_inode(struct super_block *sb)
-+{
-+ struct squashfs_inode_info *ei;
-+ ei = kmem_cache_alloc(squashfs_inode_cachep, GFP_KERNEL);
-+ if (!ei)
-+ return NULL;
-+ return &ei->vfs_inode;
-+}
-+
-+
-+static void squashfs_destroy_inode(struct inode *inode)
-+{
-+ kmem_cache_free(squashfs_inode_cachep, SQUASHFS_I(inode));
-+}
-+
-+
-+static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
-+{
-+ struct squashfs_inode_info *ei = foo;
-+
-+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
-+ SLAB_CTOR_CONSTRUCTOR)
-+ inode_init_once(&ei->vfs_inode);
-+}
-+
-+
-+static int __init init_inodecache(void)
-+{
-+ squashfs_inode_cachep = kmem_cache_create("squashfs_inode_cache",
-+ sizeof(struct squashfs_inode_info),
-+ 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
-+ init_once, NULL);
-+ if (squashfs_inode_cachep == NULL)
-+ return -ENOMEM;
-+ return 0;
-+}
-+
-+
-+static void destroy_inodecache(void)
-+{
-+ kmem_cache_destroy(squashfs_inode_cachep);
-+}
-+
-+
-+module_init(init_squashfs_fs);
-+module_exit(exit_squashfs_fs);
-+MODULE_DESCRIPTION("squashfs 3.2-r2, a compressed read-only filesystem");
-+MODULE_AUTHOR("Phillip Lougher <phillip@lougher.org.uk>");
-+MODULE_LICENSE("GPL");
-diff -rduNp linux-2.6.22.1.oorig/fs/squashfs/squashfs.h linux-2.6.22.1/fs/squashfs/squashfs.h
---- linux-2.6.22.1.oorig/fs/squashfs/squashfs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/squashfs/squashfs.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,87 @@
-+/*
-+ * Squashfs - a compressed read only filesystem for Linux
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs.h
-+ */
-+
-+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
-+#undef CONFIG_SQUASHFS_1_0_COMPATIBILITY
-+#endif
-+
-+#ifdef SQUASHFS_TRACE
-+#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args)
-+#else
-+#define TRACE(s, args...) {}
-+#endif
-+
-+#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args)
-+
-+#define SERROR(s, args...) do { \
-+ if (!silent) \
-+ printk(KERN_ERR "SQUASHFS error: "s, ## args);\
-+ } while(0)
-+
-+#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args)
-+
-+static inline struct squashfs_inode_info *SQUASHFS_I(struct inode *inode)
-+{
-+ return list_entry(inode, struct squashfs_inode_info, vfs_inode);
-+}
-+
-+#if defined(CONFIG_SQUASHFS_1_0_COMPATIBILITY ) || defined(CONFIG_SQUASHFS_2_0_COMPATIBILITY)
-+#define SQSH_EXTERN
-+extern unsigned int squashfs_read_data(struct super_block *s, char *buffer,
-+ long long index, unsigned int length,
-+ long long *next_index, int srclength);
-+extern int squashfs_get_cached_block(struct super_block *s, char *buffer,
-+ long long block, unsigned int offset,
-+ int length, long long *next_block,
-+ unsigned int *next_offset);
-+extern void release_cached_fragment(struct squashfs_sb_info *msblk, struct
-+ squashfs_fragment_cache *fragment);
-+extern struct squashfs_fragment_cache *get_cached_fragment(struct super_block
-+ *s, long long start_block,
-+ int length);
-+extern struct inode *squashfs_iget(struct super_block *s, squashfs_inode_t inode, unsigned int inode_number);
-+extern const struct address_space_operations squashfs_symlink_aops;
-+extern const struct address_space_operations squashfs_aops;
-+extern const struct address_space_operations squashfs_aops_4K;
-+extern struct inode_operations squashfs_dir_inode_ops;
-+#else
-+#define SQSH_EXTERN static
-+#endif
-+
-+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
-+extern int squashfs_1_0_supported(struct squashfs_sb_info *msblk);
-+#else
-+static inline int squashfs_1_0_supported(struct squashfs_sb_info *msblk)
-+{
-+ return 0;
-+}
-+#endif
-+
-+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
-+extern int squashfs_2_0_supported(struct squashfs_sb_info *msblk);
-+#else
-+static inline int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
-+{
-+ return 0;
-+}
-+#endif
-diff -rduNp linux-2.6.22.1.oorig/fs/squashfs/squashfs2_0.c linux-2.6.22.1/fs/squashfs/squashfs2_0.c
---- linux-2.6.22.1.oorig/fs/squashfs/squashfs2_0.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/fs/squashfs/squashfs2_0.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,742 @@
-+/*
-+ * Squashfs - a compressed read only filesystem for Linux
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs2_0.c
-+ */
-+
-+#include <linux/squashfs_fs.h>
-+#include <linux/module.h>
-+#include <linux/zlib.h>
-+#include <linux/fs.h>
-+#include <linux/squashfs_fs_sb.h>
-+#include <linux/squashfs_fs_i.h>
-+
-+#include "squashfs.h"
-+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir);
-+static struct dentry *squashfs_lookup_2(struct inode *, struct dentry *,
-+ struct nameidata *);
-+
-+static struct file_operations squashfs_dir_ops_2 = {
-+ .read = generic_read_dir,
-+ .readdir = squashfs_readdir_2
-+};
-+
-+static struct inode_operations squashfs_dir_inode_ops_2 = {
-+ .lookup = squashfs_lookup_2
-+};
-+
-+static unsigned char squashfs_filetype_table[] = {
-+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
-+};
-+
-+static int read_fragment_index_table_2(struct super_block *s)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ if (!(msblk->fragment_index_2 = kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES_2
-+ (sblk->fragments), GFP_KERNEL))) {
-+ ERROR("Failed to allocate uid/gid table\n");
-+ return 0;
-+ }
-+
-+ if (SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments) &&
-+ !squashfs_read_data(s, (char *)
-+ msblk->fragment_index_2,
-+ sblk->fragment_table_start,
-+ SQUASHFS_FRAGMENT_INDEX_BYTES_2
-+ (sblk->fragments) |
-+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments))) {
-+ ERROR("unable to read fragment index table\n");
-+ return 0;
-+ }
-+
-+ if (msblk->swap) {
-+ int i;
-+ unsigned int fragment;
-+
-+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES_2(sblk->fragments);
-+ i++) {
-+ SQUASHFS_SWAP_FRAGMENT_INDEXES_2((&fragment),
-+ &msblk->fragment_index_2[i], 1);
-+ msblk->fragment_index_2[i] = fragment;
-+ }
-+ }
-+
-+ return 1;
-+}
-+
-+
-+static int get_fragment_location_2(struct super_block *s, unsigned int fragment,
-+ long long *fragment_start_block,
-+ unsigned int *fragment_size)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ long long start_block =
-+ msblk->fragment_index_2[SQUASHFS_FRAGMENT_INDEX_2(fragment)];
-+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET_2(fragment);
-+ struct squashfs_fragment_entry_2 fragment_entry;
-+
-+ if (msblk->swap) {
-+ struct squashfs_fragment_entry_2 sfragment_entry;
-+
-+ if (!squashfs_get_cached_block(s, (char *) &sfragment_entry,
-+ start_block, offset,
-+ sizeof(sfragment_entry), &start_block,
-+ &offset))
-+ goto out;
-+ SQUASHFS_SWAP_FRAGMENT_ENTRY_2(&fragment_entry, &sfragment_entry);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *) &fragment_entry,
-+ start_block, offset,
-+ sizeof(fragment_entry), &start_block,
-+ &offset))
-+ goto out;
-+
-+ *fragment_start_block = fragment_entry.start_block;
-+ *fragment_size = fragment_entry.size;
-+
-+ return 1;
-+
-+out:
-+ return 0;
-+}
-+
-+
-+static void squashfs_new_inode(struct squashfs_sb_info *msblk, struct inode *i,
-+ struct squashfs_base_inode_header_2 *inodeb, unsigned int ino)
-+{
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ i->i_ino = ino;
-+ i->i_mtime.tv_sec = sblk->mkfs_time;
-+ i->i_atime.tv_sec = sblk->mkfs_time;
-+ i->i_ctime.tv_sec = sblk->mkfs_time;
-+ i->i_uid = msblk->uid[inodeb->uid];
-+ i->i_mode = inodeb->mode;
-+ i->i_nlink = 1;
-+ i->i_size = 0;
-+ if (inodeb->guid == SQUASHFS_GUIDS)
-+ i->i_gid = i->i_uid;
-+ else
-+ i->i_gid = msblk->guid[inodeb->guid];
-+}
-+
-+
-+static int squashfs_read_inode_2(struct inode *i, squashfs_inode_t inode)
-+{
-+ struct super_block *s = i->i_sb;
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ unsigned int block = SQUASHFS_INODE_BLK(inode) +
-+ sblk->inode_table_start;
-+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
-+ unsigned int ino = i->i_ino;
-+ long long next_block;
-+ unsigned int next_offset;
-+ union squashfs_inode_header_2 id, sid;
-+ struct squashfs_base_inode_header_2 *inodeb = &id.base,
-+ *sinodeb = &sid.base;
-+
-+ TRACE("Entered squashfs_iget\n");
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *) sinodeb, block,
-+ offset, sizeof(*sinodeb), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(inodeb, sinodeb,
-+ sizeof(*sinodeb));
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *) inodeb, block,
-+ offset, sizeof(*inodeb), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ squashfs_new_inode(msblk, i, inodeb, ino);
-+
-+ switch(inodeb->inode_type) {
-+ case SQUASHFS_FILE_TYPE: {
-+ struct squashfs_reg_inode_header_2 *inodep = &id.reg;
-+ struct squashfs_reg_inode_header_2 *sinodep = &sid.reg;
-+ long long frag_blk;
-+ unsigned int frag_size = 0;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_REG_INODE_HEADER_2(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ frag_blk = SQUASHFS_INVALID_BLK;
-+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
-+ !get_fragment_location_2(s,
-+ inodep->fragment, &frag_blk, &frag_size))
-+ goto failed_read;
-+
-+ i->i_size = inodep->file_size;
-+ i->i_fop = &generic_ro_fops;
-+ i->i_mode |= S_IFREG;
-+ i->i_mtime.tv_sec = inodep->mtime;
-+ i->i_atime.tv_sec = inodep->mtime;
-+ i->i_ctime.tv_sec = inodep->mtime;
-+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
-+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
-+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
-+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+ if (sblk->block_size > 4096)
-+ i->i_data.a_ops = &squashfs_aops;
-+ else
-+ i->i_data.a_ops = &squashfs_aops_4K;
-+
-+ TRACE("File inode %x:%x, start_block %x, "
-+ "block_list_start %llx, offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, next_block,
-+ next_offset);
-+ break;
-+ }
-+ case SQUASHFS_DIR_TYPE: {
-+ struct squashfs_dir_inode_header_2 *inodep = &id.dir;
-+ struct squashfs_dir_inode_header_2 *sinodep = &sid.dir;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_DIR_INODE_HEADER_2(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_size = inodep->file_size;
-+ i->i_op = &squashfs_dir_inode_ops_2;
-+ i->i_fop = &squashfs_dir_ops_2;
-+ i->i_mode |= S_IFDIR;
-+ i->i_mtime.tv_sec = inodep->mtime;
-+ i->i_atime.tv_sec = inodep->mtime;
-+ i->i_ctime.tv_sec = inodep->mtime;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->offset = inodep->offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_count = 0;
-+ SQUASHFS_I(i)->u.s2.parent_inode = 0;
-+
-+ TRACE("Directory inode %x:%x, start_block %x, offset "
-+ "%x\n", SQUASHFS_INODE_BLK(inode),
-+ offset, inodep->start_block,
-+ inodep->offset);
-+ break;
-+ }
-+ case SQUASHFS_LDIR_TYPE: {
-+ struct squashfs_ldir_inode_header_2 *inodep = &id.ldir;
-+ struct squashfs_ldir_inode_header_2 *sinodep = &sid.ldir;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_LDIR_INODE_HEADER_2(inodep,
-+ sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_size = inodep->file_size;
-+ i->i_op = &squashfs_dir_inode_ops_2;
-+ i->i_fop = &squashfs_dir_ops_2;
-+ i->i_mode |= S_IFDIR;
-+ i->i_mtime.tv_sec = inodep->mtime;
-+ i->i_atime.tv_sec = inodep->mtime;
-+ i->i_ctime.tv_sec = inodep->mtime;
-+ SQUASHFS_I(i)->start_block = inodep->start_block;
-+ SQUASHFS_I(i)->offset = inodep->offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
-+ SQUASHFS_I(i)->u.s2.directory_index_offset =
-+ next_offset;
-+ SQUASHFS_I(i)->u.s2.directory_index_count =
-+ inodep->i_count;
-+ SQUASHFS_I(i)->u.s2.parent_inode = 0;
-+
-+ TRACE("Long directory inode %x:%x, start_block %x, "
-+ "offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->start_block, inodep->offset);
-+ break;
-+ }
-+ case SQUASHFS_SYMLINK_TYPE: {
-+ struct squashfs_symlink_inode_header_2 *inodep =
-+ &id.symlink;
-+ struct squashfs_symlink_inode_header_2 *sinodep =
-+ &sid.symlink;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(inodep,
-+ sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_size = inodep->symlink_size;
-+ i->i_op = &page_symlink_inode_operations;
-+ i->i_data.a_ops = &squashfs_symlink_aops;
-+ i->i_mode |= S_IFLNK;
-+ SQUASHFS_I(i)->start_block = next_block;
-+ SQUASHFS_I(i)->offset = next_offset;
-+
-+ TRACE("Symbolic link inode %x:%x, start_block %llx, "
-+ "offset %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ next_block, next_offset);
-+ break;
-+ }
-+ case SQUASHFS_BLKDEV_TYPE:
-+ case SQUASHFS_CHRDEV_TYPE: {
-+ struct squashfs_dev_inode_header_2 *inodep = &id.dev;
-+ struct squashfs_dev_inode_header_2 *sinodep = &sid.dev;
-+
-+ if (msblk->swap) {
-+ if (!squashfs_get_cached_block(s, (char *)
-+ sinodep, block, offset,
-+ sizeof(*sinodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+ SQUASHFS_SWAP_DEV_INODE_HEADER_2(inodep, sinodep);
-+ } else
-+ if (!squashfs_get_cached_block(s, (char *)
-+ inodep, block, offset,
-+ sizeof(*inodep), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ i->i_mode |= (inodeb->inode_type ==
-+ SQUASHFS_CHRDEV_TYPE) ? S_IFCHR :
-+ S_IFBLK;
-+ init_special_inode(i, i->i_mode,
-+ old_decode_dev(inodep->rdev));
-+
-+ TRACE("Device inode %x:%x, rdev %x\n",
-+ SQUASHFS_INODE_BLK(inode), offset,
-+ inodep->rdev);
-+ break;
-+ }
-+ case SQUASHFS_FIFO_TYPE:
-+ case SQUASHFS_SOCKET_TYPE: {
-+
-+ i->i_mode |= (inodeb->inode_type == SQUASHFS_FIFO_TYPE)
-+ ? S_IFIFO : S_IFSOCK;
-+ init_special_inode(i, i->i_mode, 0);
-+ break;
-+ }
-+ default:
-+ ERROR("Unknown inode type %d in squashfs_iget!\n",
-+ inodeb->inode_type);
-+ goto failed_read1;
-+ }
-+
-+ return 1;
-+
-+failed_read:
-+ ERROR("Unable to read inode [%x:%x]\n", block, offset);
-+
-+failed_read1:
-+ return 0;
-+}
-+
-+
-+static int get_dir_index_using_offset(struct super_block *s, long long
-+ *next_block, unsigned int *next_offset,
-+ long long index_start,
-+ unsigned int index_offset, int i_count,
-+ long long f_pos)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int i, length = 0;
-+ struct squashfs_dir_index_2 index;
-+
-+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n",
-+ i_count, (unsigned int) f_pos);
-+
-+ if (f_pos == 0)
-+ goto finish;
-+
-+ for (i = 0; i < i_count; i++) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_index_2 sindex;
-+ squashfs_get_cached_block(s, (char *) &sindex,
-+ index_start, index_offset,
-+ sizeof(sindex), &index_start,
-+ &index_offset);
-+ SQUASHFS_SWAP_DIR_INDEX_2(&index, &sindex);
-+ } else
-+ squashfs_get_cached_block(s, (char *) &index,
-+ index_start, index_offset,
-+ sizeof(index), &index_start,
-+ &index_offset);
-+
-+ if (index.index > f_pos)
-+ break;
-+
-+ squashfs_get_cached_block(s, NULL, index_start, index_offset,
-+ index.size + 1, &index_start,
-+ &index_offset);
-+
-+ length = index.index;
-+ *next_block = index.start_block + sblk->directory_table_start;
-+ }
-+
-+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
-+
-+finish:
-+ return length;
-+}
-+
-+
-+static int get_dir_index_using_name(struct super_block *s, long long
-+ *next_block, unsigned int *next_offset,
-+ long long index_start,
-+ unsigned int index_offset, int i_count,
-+ const char *name, int size)
-+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ int i, length = 0;
-+ struct squashfs_dir_index_2 *index;
-+ char *str;
-+
-+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
-+
-+ if (!(str = kmalloc(sizeof(struct squashfs_dir_index) +
-+ (SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_index\n");
-+ goto failure;
-+ }
-+
-+ index = (struct squashfs_dir_index_2 *) (str + SQUASHFS_NAME_LEN + 1);
-+ strncpy(str, name, size);
-+ str[size] = '\0';
-+
-+ for (i = 0; i < i_count; i++) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_index_2 sindex;
-+ squashfs_get_cached_block(s, (char *) &sindex,
-+ index_start, index_offset,
-+ sizeof(sindex), &index_start,
-+ &index_offset);
-+ SQUASHFS_SWAP_DIR_INDEX_2(index, &sindex);
-+ } else
-+ squashfs_get_cached_block(s, (char *) index,
-+ index_start, index_offset,
-+ sizeof(struct squashfs_dir_index_2),
-+ &index_start, &index_offset);
-+
-+ squashfs_get_cached_block(s, index->name, index_start,
-+ index_offset, index->size + 1,
-+ &index_start, &index_offset);
-+
-+ index->name[index->size + 1] = '\0';
-+
-+ if (strcmp(index->name, str) > 0)
-+ break;
-+
-+ length = index->index;
-+ *next_block = index->start_block + sblk->directory_table_start;
-+ }
-+
-+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
-+ kfree(str);
-+failure:
-+ return length;
-+}
-+
-+
-+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir)
-+{
-+ struct inode *i = file->f_dentry->d_inode;
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long next_block = SQUASHFS_I(i)->start_block +
-+ sblk->directory_table_start;
-+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
-+ dir_count;
-+ struct squashfs_dir_header_2 dirh;
-+ struct squashfs_dir_entry_2 *dire;
-+
-+ TRACE("Entered squashfs_readdir_2 [%llx:%x]\n", next_block, next_offset);
-+
-+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
-+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_entry\n");
-+ goto finish;
-+ }
-+
-+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_start,
-+ SQUASHFS_I(i)->u.s2.directory_index_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_count,
-+ file->f_pos);
-+
-+ while (length < i_size_read(i)) {
-+ /* read directory header */
-+ if (msblk->swap) {
-+ struct squashfs_dir_header_2 sdirh;
-+
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
-+ next_block, next_offset, sizeof(sdirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdirh);
-+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
-+ next_block, next_offset, sizeof(dirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(dirh);
-+ }
-+
-+ dir_count = dirh.count + 1;
-+ while (dir_count--) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_entry_2 sdire;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ &sdire, next_block, next_offset,
-+ sizeof(sdire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdire);
-+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ dire, next_block, next_offset,
-+ sizeof(*dire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(*dire);
-+ }
-+
-+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
-+ next_block, next_offset,
-+ dire->size + 1, &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += dire->size + 1;
-+
-+ if (file->f_pos >= length)
-+ continue;
-+
-+ dire->name[dire->size + 1] = '\0';
-+
-+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d)\n",
-+ (unsigned int) dirent, dire->name,
-+ dire->size + 1, (int) file->f_pos,
-+ dirh.start_block, dire->offset,
-+ squashfs_filetype_table[dire->type]);
-+
-+ if (filldir(dirent, dire->name, dire->size + 1,
-+ file->f_pos, SQUASHFS_MK_VFS_INODE(
-+ dirh.start_block, dire->offset),
-+ squashfs_filetype_table[dire->type])
-+ < 0) {
-+ TRACE("Filldir returned less than 0\n");
-+ goto finish;
-+ }
-+ file->f_pos = length;
-+ }
-+ }
-+
-+finish:
-+ kfree(dire);
-+ return 0;
-+
-+failed_read:
-+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
-+ next_offset);
-+ kfree(dire);
-+ return 0;
-+}
-+
-+
-+static struct dentry *squashfs_lookup_2(struct inode *i, struct dentry *dentry,
-+ struct nameidata *nd)
-+{
-+ const unsigned char *name = dentry->d_name.name;
-+ int len = dentry->d_name.len;
-+ struct inode *inode = NULL;
-+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+ long long next_block = SQUASHFS_I(i)->start_block +
-+ sblk->directory_table_start;
-+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
-+ dir_count;
-+ struct squashfs_dir_header_2 dirh;
-+ struct squashfs_dir_entry_2 *dire;
-+ int sorted = sblk->s_major == 2 && sblk->s_minor >= 1;
-+
-+ TRACE("Entered squashfs_lookup_2 [%llx:%x]\n", next_block, next_offset);
-+
-+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
-+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
-+ ERROR("Failed to allocate squashfs_dir_entry\n");
-+ goto exit_loop;
-+ }
-+
-+ if (len > SQUASHFS_NAME_LEN)
-+ goto exit_loop;
-+
-+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_start,
-+ SQUASHFS_I(i)->u.s2.directory_index_offset,
-+ SQUASHFS_I(i)->u.s2.directory_index_count, name,
-+ len);
-+
-+ while (length < i_size_read(i)) {
-+ /* read directory header */
-+ if (msblk->swap) {
-+ struct squashfs_dir_header_2 sdirh;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
-+ next_block, next_offset, sizeof(sdirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdirh);
-+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
-+ next_block, next_offset, sizeof(dirh),
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(dirh);
-+ }
-+
-+ dir_count = dirh.count + 1;
-+ while (dir_count--) {
-+ if (msblk->swap) {
-+ struct squashfs_dir_entry_2 sdire;
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ &sdire, next_block,next_offset,
-+ sizeof(sdire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(sdire);
-+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
-+ } else {
-+ if (!squashfs_get_cached_block(i->i_sb, (char *)
-+ dire, next_block,next_offset,
-+ sizeof(*dire), &next_block,
-+ &next_offset))
-+ goto failed_read;
-+
-+ length += sizeof(*dire);
-+ }
-+
-+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
-+ next_block, next_offset, dire->size + 1,
-+ &next_block, &next_offset))
-+ goto failed_read;
-+
-+ length += dire->size + 1;
-+
-+ if (sorted && name[0] < dire->name[0])
-+ goto exit_loop;
-+
-+ if ((len == dire->size + 1) && !strncmp(name,
-+ dire->name, len)) {
-+ squashfs_inode_t ino =
-+ SQUASHFS_MKINODE(dirh.start_block,
-+ dire->offset);
-+ unsigned int inode_number = SQUASHFS_MK_VFS_INODE(dirh.start_block,
-+ dire->offset);
-+
-+ TRACE("calling squashfs_iget for directory "
-+ "entry %s, inode %x:%x, %lld\n", name,
-+ dirh.start_block, dire->offset, ino);
-+
-+ inode = squashfs_iget(i->i_sb, ino, inode_number);
-+
-+ goto exit_loop;
-+ }
-+ }
-+ }
-+
-+exit_loop:
-+ kfree(dire);
-+ d_add(dentry, inode);
-+ return ERR_PTR(0);
-+
-+failed_read:
-+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
-+ next_offset);
-+ goto exit_loop;
-+}
-+
-+
-+int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
-+{
-+ struct squashfs_super_block *sblk = &msblk->sblk;
-+
-+ msblk->read_inode = squashfs_read_inode_2;
-+ msblk->read_fragment_index_table = read_fragment_index_table_2;
-+
-+ sblk->bytes_used = sblk->bytes_used_2;
-+ sblk->uid_start = sblk->uid_start_2;
-+ sblk->guid_start = sblk->guid_start_2;
-+ sblk->inode_table_start = sblk->inode_table_start_2;
-+ sblk->directory_table_start = sblk->directory_table_start_2;
-+ sblk->fragment_table_start = sblk->fragment_table_start_2;
-+
-+ return 1;
-+}
-diff -rduNp linux-2.6.22.1.oorig/include/linux/aufs_type.h linux-2.6.22.1/include/linux/aufs_type.h
---- linux-2.6.22.1.oorig/include/linux/aufs_type.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/include/linux/aufs_type.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,97 @@
-+/*
-+ * Copyright (C) 2005, 2006, 2007 Junjiro Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-+ */
-+
-+/* $Id: aufs_type.h,v 1.55 2007/05/14 03:40:57 sfjro Exp $ */
-+
-+#include <linux/ioctl.h>
-+
-+#ifndef __AUFS_TYPE_H__
-+#define __AUFS_TYPE_H__
-+
-+#define AUFS_VERSION "20070514"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+#ifdef CONFIG_AUFS_BRANCH_MAX_127
-+typedef char aufs_bindex_t;
-+#define AUFS_BRANCH_MAX 127
-+#else
-+typedef short aufs_bindex_t;
-+#ifdef CONFIG_AUFS_BRANCH_MAX_511
-+#define AUFS_BRANCH_MAX 511
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_1023)
-+#define AUFS_BRANCH_MAX 1023
-+#elif defined(CONFIG_AUFS_BRANCH_MAX_32767)
-+#define AUFS_BRANCH_MAX 32767
-+#else
-+#error unknown CONFIG_AUFS_BRANCH_MAX value
-+#endif
-+#endif
-+
-+#define AUFS_NAME "aufs"
-+#define AUFS_FSTYPE AUFS_NAME
-+
-+#define AUFS_ROOT_INO 2
-+#define AUFS_FIRST_INO 11
-+
-+#define AUFS_WH_PFX ".wh."
-+#define AUFS_WH_PFX_LEN ((int)sizeof(AUFS_WH_PFX) - 1)
-+#define AUFS_XINO_FNAME "." AUFS_NAME ".xino"
-+#define AUFS_XINO_DEFPATH "/tmp/" AUFS_XINO_FNAME
-+#define AUFS_DIRWH_DEF 3
-+#define AUFS_RDCACHE_DEF 10 /* seconds */
-+#define AUFS_WKQ_NAME AUFS_NAME "d"
-+#define AUFS_NWKQ_DEF 4
-+
-+#ifdef CONFIG_AUFS_COMPAT
-+#define AUFS_DIROPQ_NAME "__dir_opaque"
-+#else
-+#define AUFS_DIROPQ_NAME AUFS_WH_PFX ".opq" /* whiteouted doubly */
-+#endif
-+#define AUFS_WH_DIROPQ AUFS_WH_PFX AUFS_DIROPQ_NAME
-+
-+/* will be whiteouted doubly */
-+#define AUFS_WH_BASENAME AUFS_WH_PFX AUFS_NAME
-+#define AUFS_WH_PLINKDIR AUFS_WH_PFX "plink"
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* ioctl */
-+enum {AuCtlErr, AuCtlErr_Last};
-+enum {
-+ AuCtl_REFRESH, //AuCtl_REFRESHV,
-+ //AuCtl_FLUSH_PLINK,
-+ //AuCtl_CPUP,
-+ AuCtl_CPDOWN, AuCtl_MVDOWN
-+};
-+
-+struct aufs_ctl_cp {
-+ int bsrc, bdst;
-+ int err;
-+};
-+
-+#define Type 'A'
-+#define AUFS_CTL_REFRESH _IO(Type, AuCtl_REFRESH)
-+//#define AUFS_CTL_REFRESHV _IO(Type, AuCtl_REFRESHV)
-+//#define AUFS_CTL_FLUSH_PLINK _IOR(Type, AuCtl_FLUSH_PLINK)
-+//#define AUFS_CTL_CPUP _IOWR(Type, AuCtl_CPUP, struct aufs_ctl_cp)
-+#define AUFS_CTL_CPDOWN _IOWR(Type, AuCtl_CPDOWN, struct aufs_ctl_cp)
-+#define AUFS_CTL_MVDOWN _IOWR(Type, AuCtl_MVDOWN, struct aufs_ctl_cp)
-+#undef Type
-+
-+#endif /* __AUFS_TYPE_H__ */
-diff -rduNp linux-2.6.22.1.oorig/include/linux/squashfs_fs.h linux-2.6.22.1/include/linux/squashfs_fs.h
---- linux-2.6.22.1.oorig/include/linux/squashfs_fs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/include/linux/squashfs_fs.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,934 @@
-+#ifndef SQUASHFS_FS
-+#define SQUASHFS_FS
-+
-+/*
-+ * Squashfs
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs_fs.h
-+ */
-+
-+#ifndef CONFIG_SQUASHFS_2_0_COMPATIBILITY
-+#define CONFIG_SQUASHFS_2_0_COMPATIBILITY
-+#endif
-+
-+#ifdef CONFIG_SQUASHFS_VMALLOC
-+#define SQUASHFS_ALLOC(a) vmalloc(a)
-+#define SQUASHFS_FREE(a) vfree(a)
-+#else
-+#define SQUASHFS_ALLOC(a) kmalloc(a, GFP_KERNEL)
-+#define SQUASHFS_FREE(a) kfree(a)
-+#endif
-+#define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
-+#define SQUASHFS_MAJOR 3
-+#define SQUASHFS_MINOR 0
-+#define SQUASHFS_MAGIC 0x73717368
-+#define SQUASHFS_MAGIC_SWAP 0x68737173
-+#define SQUASHFS_START 0
-+
-+/* size of metadata (inode and directory) blocks */
-+#define SQUASHFS_METADATA_SIZE 8192
-+#define SQUASHFS_METADATA_LOG 13
-+
-+/* default size of data blocks */
-+#define SQUASHFS_FILE_SIZE 65536
-+#define SQUASHFS_FILE_LOG 16
-+
-+#define SQUASHFS_FILE_MAX_SIZE 65536
-+
-+/* Max number of uids and gids */
-+#define SQUASHFS_UIDS 256
-+#define SQUASHFS_GUIDS 255
-+
-+/* Max length of filename (not 255) */
-+#define SQUASHFS_NAME_LEN 256
-+
-+#define SQUASHFS_INVALID ((long long) 0xffffffffffff)
-+#define SQUASHFS_INVALID_FRAG ((unsigned int) 0xffffffff)
-+#define SQUASHFS_INVALID_BLK ((long long) -1)
-+#define SQUASHFS_USED_BLK ((long long) -2)
-+
-+/* Filesystem flags */
-+#define SQUASHFS_NOI 0
-+#define SQUASHFS_NOD 1
-+#define SQUASHFS_CHECK 2
-+#define SQUASHFS_NOF 3
-+#define SQUASHFS_NO_FRAG 4
-+#define SQUASHFS_ALWAYS_FRAG 5
-+#define SQUASHFS_DUPLICATE 6
-+#define SQUASHFS_EXPORT 7
-+
-+#define SQUASHFS_BIT(flag, bit) ((flag >> bit) & 1)
-+
-+#define SQUASHFS_UNCOMPRESSED_INODES(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_NOI)
-+
-+#define SQUASHFS_UNCOMPRESSED_DATA(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_NOD)
-+
-+#define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_NOF)
-+
-+#define SQUASHFS_NO_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_NO_FRAG)
-+
-+#define SQUASHFS_ALWAYS_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_ALWAYS_FRAG)
-+
-+#define SQUASHFS_DUPLICATES(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_DUPLICATE)
-+
-+#define SQUASHFS_EXPORTABLE(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_EXPORT)
-+
-+#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, \
-+ SQUASHFS_CHECK)
-+
-+#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, \
-+ duplicate_checking, exortable) (noi | (nod << 1) | (check_data << 2) \
-+ | (nof << 3) | (no_frag << 4) | (always_frag << 5) | \
-+ (duplicate_checking << 6) | (exportable << 7))
-+
-+/* Max number of types and file types */
-+#define SQUASHFS_DIR_TYPE 1
-+#define SQUASHFS_FILE_TYPE 2
-+#define SQUASHFS_SYMLINK_TYPE 3
-+#define SQUASHFS_BLKDEV_TYPE 4
-+#define SQUASHFS_CHRDEV_TYPE 5
-+#define SQUASHFS_FIFO_TYPE 6
-+#define SQUASHFS_SOCKET_TYPE 7
-+#define SQUASHFS_LDIR_TYPE 8
-+#define SQUASHFS_LREG_TYPE 9
-+
-+/* 1.0 filesystem type definitions */
-+#define SQUASHFS_TYPES 5
-+#define SQUASHFS_IPC_TYPE 0
-+
-+/* Flag whether block is compressed or uncompressed, bit is set if block is
-+ * uncompressed */
-+#define SQUASHFS_COMPRESSED_BIT (1 << 15)
-+
-+#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \
-+ (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT)
-+
-+#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT))
-+
-+#define SQUASHFS_COMPRESSED_BIT_BLOCK (1 << 24)
-+
-+#define SQUASHFS_COMPRESSED_SIZE_BLOCK(B) (((B) & \
-+ ~SQUASHFS_COMPRESSED_BIT_BLOCK) ? (B) & \
-+ ~SQUASHFS_COMPRESSED_BIT_BLOCK : SQUASHFS_COMPRESSED_BIT_BLOCK)
-+
-+#define SQUASHFS_COMPRESSED_BLOCK(B) (!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK))
-+
-+/*
-+ * Inode number ops. Inodes consist of a compressed block number, and an
-+ * uncompressed offset within that block
-+ */
-+#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16))
-+
-+#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff))
-+
-+#define SQUASHFS_MKINODE(A, B) ((squashfs_inode_t)(((squashfs_inode_t) (A)\
-+ << 16) + (B)))
-+
-+/* Compute 32 bit VFS inode number from squashfs inode number */
-+#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + \
-+ ((b) >> 2) + 1))
-+/* XXX */
-+
-+/* Translate between VFS mode and squashfs mode */
-+#define SQUASHFS_MODE(a) ((a) & 0xfff)
-+
-+/* fragment and fragment table defines */
-+#define SQUASHFS_FRAGMENT_BYTES(A) ((A) * sizeof(struct squashfs_fragment_entry))
-+
-+#define SQUASHFS_FRAGMENT_INDEX(A) (SQUASHFS_FRAGMENT_BYTES(A) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEX_OFFSET(A) (SQUASHFS_FRAGMENT_BYTES(A) % \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEXES(A) ((SQUASHFS_FRAGMENT_BYTES(A) + \
-+ SQUASHFS_METADATA_SIZE - 1) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEX_BYTES(A) (SQUASHFS_FRAGMENT_INDEXES(A) *\
-+ sizeof(long long))
-+
-+/* inode lookup table defines */
-+#define SQUASHFS_LOOKUP_BYTES(A) ((A) * sizeof(squashfs_inode_t))
-+
-+#define SQUASHFS_LOOKUP_BLOCK(A) (SQUASHFS_LOOKUP_BYTES(A) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_LOOKUP_BLOCK_OFFSET(A) (SQUASHFS_LOOKUP_BYTES(A) % \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_LOOKUP_BLOCKS(A) ((SQUASHFS_LOOKUP_BYTES(A) + \
-+ SQUASHFS_METADATA_SIZE - 1) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_LOOKUP_BLOCK_BYTES(A) (SQUASHFS_LOOKUP_BLOCKS(A) *\
-+ sizeof(long long))
-+
-+/* cached data constants for filesystem */
-+#define SQUASHFS_CACHED_BLKS 8
-+
-+#define SQUASHFS_MAX_FILE_SIZE_LOG 64
-+
-+#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << \
-+ (SQUASHFS_MAX_FILE_SIZE_LOG - 2))
-+
-+#define SQUASHFS_MARKER_BYTE 0xff
-+
-+/* meta index cache */
-+#define SQUASHFS_META_INDEXES (SQUASHFS_METADATA_SIZE / sizeof(unsigned int))
-+#define SQUASHFS_META_ENTRIES 31
-+#define SQUASHFS_META_NUMBER 8
-+#define SQUASHFS_SLOTS 4
-+
-+struct meta_entry {
-+ long long data_block;
-+ unsigned int index_block;
-+ unsigned short offset;
-+ unsigned short pad;
-+};
-+
-+struct meta_index {
-+ unsigned int inode_number;
-+ unsigned int offset;
-+ unsigned short entries;
-+ unsigned short skip;
-+ unsigned short locked;
-+ unsigned short pad;
-+ struct meta_entry meta_entry[SQUASHFS_META_ENTRIES];
-+};
-+
-+
-+/*
-+ * definitions for structures on disk
-+ */
-+
-+typedef long long squashfs_block_t;
-+typedef long long squashfs_inode_t;
-+
-+struct squashfs_super_block {
-+ unsigned int s_magic;
-+ unsigned int inodes;
-+ unsigned int bytes_used_2;
-+ unsigned int uid_start_2;
-+ unsigned int guid_start_2;
-+ unsigned int inode_table_start_2;
-+ unsigned int directory_table_start_2;
-+ unsigned int s_major:16;
-+ unsigned int s_minor:16;
-+ unsigned int block_size_1:16;
-+ unsigned int block_log:16;
-+ unsigned int flags:8;
-+ unsigned int no_uids:8;
-+ unsigned int no_guids:8;
-+ unsigned int mkfs_time /* time of filesystem creation */;
-+ squashfs_inode_t root_inode;
-+ unsigned int block_size;
-+ unsigned int fragments;
-+ unsigned int fragment_table_start_2;
-+ long long bytes_used;
-+ long long uid_start;
-+ long long guid_start;
-+ long long inode_table_start;
-+ long long directory_table_start;
-+ long long fragment_table_start;
-+ long long lookup_table_start;
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_index {
-+ unsigned int index;
-+ unsigned int start_block;
-+ unsigned char size;
-+ unsigned char name[0];
-+} __attribute__ ((packed));
-+
-+#define SQUASHFS_BASE_INODE_HEADER \
-+ unsigned int inode_type:4; \
-+ unsigned int mode:12; \
-+ unsigned int uid:8; \
-+ unsigned int guid:8; \
-+ unsigned int mtime; \
-+ unsigned int inode_number;
-+
-+struct squashfs_base_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+} __attribute__ ((packed));
-+
-+struct squashfs_ipc_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+} __attribute__ ((packed));
-+
-+struct squashfs_dev_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ unsigned short rdev;
-+} __attribute__ ((packed));
-+
-+struct squashfs_symlink_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ unsigned short symlink_size;
-+ char symlink[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_reg_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ squashfs_block_t start_block;
-+ unsigned int fragment;
-+ unsigned int offset;
-+ unsigned int file_size;
-+ unsigned short block_list[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_lreg_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ squashfs_block_t start_block;
-+ unsigned int fragment;
-+ unsigned int offset;
-+ long long file_size;
-+ unsigned short block_list[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ unsigned int file_size:19;
-+ unsigned int offset:13;
-+ unsigned int start_block;
-+ unsigned int parent_inode;
-+} __attribute__ ((packed));
-+
-+struct squashfs_ldir_inode_header {
-+ SQUASHFS_BASE_INODE_HEADER;
-+ unsigned int nlink;
-+ unsigned int file_size:27;
-+ unsigned int offset:13;
-+ unsigned int start_block;
-+ unsigned int i_count:16;
-+ unsigned int parent_inode;
-+ struct squashfs_dir_index index[0];
-+} __attribute__ ((packed));
-+
-+union squashfs_inode_header {
-+ struct squashfs_base_inode_header base;
-+ struct squashfs_dev_inode_header dev;
-+ struct squashfs_symlink_inode_header symlink;
-+ struct squashfs_reg_inode_header reg;
-+ struct squashfs_lreg_inode_header lreg;
-+ struct squashfs_dir_inode_header dir;
-+ struct squashfs_ldir_inode_header ldir;
-+ struct squashfs_ipc_inode_header ipc;
-+};
-+
-+struct squashfs_dir_entry {
-+ unsigned int offset:13;
-+ unsigned int type:3;
-+ unsigned int size:8;
-+ int inode_number:16;
-+ char name[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_header {
-+ unsigned int count:8;
-+ unsigned int start_block;
-+ unsigned int inode_number;
-+} __attribute__ ((packed));
-+
-+struct squashfs_fragment_entry {
-+ long long start_block;
-+ unsigned int size;
-+ unsigned int pending;
-+} __attribute__ ((packed));
-+
-+extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen);
-+extern int squashfs_uncompress_init(void);
-+extern int squashfs_uncompress_exit(void);
-+
-+/*
-+ * macros to convert each packed bitfield structure from little endian to big
-+ * endian and vice versa. These are needed when creating or using a filesystem
-+ * on a machine with different byte ordering to the target architecture.
-+ *
-+ */
-+
-+#define SQUASHFS_SWAP_START \
-+ int bits;\
-+ int b_pos;\
-+ unsigned long long val;\
-+ unsigned char *s;\
-+ unsigned char *d;
-+
-+#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_super_block));\
-+ SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\
-+ SQUASHFS_SWAP((s)->inodes, d, 32, 32);\
-+ SQUASHFS_SWAP((s)->bytes_used_2, d, 64, 32);\
-+ SQUASHFS_SWAP((s)->uid_start_2, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->guid_start_2, d, 128, 32);\
-+ SQUASHFS_SWAP((s)->inode_table_start_2, d, 160, 32);\
-+ SQUASHFS_SWAP((s)->directory_table_start_2, d, 192, 32);\
-+ SQUASHFS_SWAP((s)->s_major, d, 224, 16);\
-+ SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\
-+ SQUASHFS_SWAP((s)->block_size_1, d, 256, 16);\
-+ SQUASHFS_SWAP((s)->block_log, d, 272, 16);\
-+ SQUASHFS_SWAP((s)->flags, d, 288, 8);\
-+ SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\
-+ SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\
-+ SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\
-+ SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\
-+ SQUASHFS_SWAP((s)->block_size, d, 408, 32);\
-+ SQUASHFS_SWAP((s)->fragments, d, 440, 32);\
-+ SQUASHFS_SWAP((s)->fragment_table_start_2, d, 472, 32);\
-+ SQUASHFS_SWAP((s)->bytes_used, d, 504, 64);\
-+ SQUASHFS_SWAP((s)->uid_start, d, 568, 64);\
-+ SQUASHFS_SWAP((s)->guid_start, d, 632, 64);\
-+ SQUASHFS_SWAP((s)->inode_table_start, d, 696, 64);\
-+ SQUASHFS_SWAP((s)->directory_table_start, d, 760, 64);\
-+ SQUASHFS_SWAP((s)->fragment_table_start, d, 824, 64);\
-+ SQUASHFS_SWAP((s)->lookup_table_start, d, 888, 64);\
-+}
-+
-+#define SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
-+ SQUASHFS_MEMSET(s, d, n);\
-+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
-+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
-+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
-+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
-+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
-+ SQUASHFS_SWAP((s)->inode_number, d, 64, 32);
-+
-+#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
-+}
-+
-+#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_ipc_inode_header))\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_dev_inode_header)); \
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->rdev, d, 128, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_symlink_inode_header));\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->symlink_size, d, 128, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_reg_inode_header));\
-+ SQUASHFS_SWAP((s)->start_block, d, 96, 64);\
-+ SQUASHFS_SWAP((s)->fragment, d, 160, 32);\
-+ SQUASHFS_SWAP((s)->offset, d, 192, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 224, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_LREG_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_lreg_inode_header));\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 128, 64);\
-+ SQUASHFS_SWAP((s)->fragment, d, 192, 32);\
-+ SQUASHFS_SWAP((s)->offset, d, 224, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 256, 64);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_dir_inode_header));\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 128, 19);\
-+ SQUASHFS_SWAP((s)->offset, d, 147, 13);\
-+ SQUASHFS_SWAP((s)->start_block, d, 160, 32);\
-+ SQUASHFS_SWAP((s)->parent_inode, d, 192, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_LDIR_INODE_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
-+ sizeof(struct squashfs_ldir_inode_header));\
-+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 128, 27);\
-+ SQUASHFS_SWAP((s)->offset, d, 155, 13);\
-+ SQUASHFS_SWAP((s)->start_block, d, 168, 32);\
-+ SQUASHFS_SWAP((s)->i_count, d, 200, 16);\
-+ SQUASHFS_SWAP((s)->parent_inode, d, 216, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INDEX(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index));\
-+ SQUASHFS_SWAP((s)->index, d, 0, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 32, 32);\
-+ SQUASHFS_SWAP((s)->size, d, 64, 8);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header));\
-+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
-+ SQUASHFS_SWAP((s)->start_block, d, 8, 32);\
-+ SQUASHFS_SWAP((s)->inode_number, d, 40, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry));\
-+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
-+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
-+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
-+ SQUASHFS_SWAP((s)->inode_number, d, 24, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_FRAGMENT_ENTRY(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry));\
-+ SQUASHFS_SWAP((s)->start_block, d, 0, 64);\
-+ SQUASHFS_SWAP((s)->size, d, 64, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_INODE_T(s, d) SQUASHFS_SWAP_LONG_LONGS(s, d, 1)
-+
-+#define SQUASHFS_SWAP_SHORTS(s, d, n) {\
-+ int entry;\
-+ int bit_position;\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, n * 2);\
-+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
-+ 16)\
-+ SQUASHFS_SWAP(s[entry], d, bit_position, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_INTS(s, d, n) {\
-+ int entry;\
-+ int bit_position;\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, n * 4);\
-+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
-+ 32)\
-+ SQUASHFS_SWAP(s[entry], d, bit_position, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_LONG_LONGS(s, d, n) {\
-+ int entry;\
-+ int bit_position;\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, n * 8);\
-+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
-+ 64)\
-+ SQUASHFS_SWAP(s[entry], d, bit_position, 64);\
-+}
-+
-+#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\
-+ int entry;\
-+ int bit_position;\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, n * bits / 8);\
-+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
-+ bits)\
-+ SQUASHFS_SWAP(s[entry], d, bit_position, bits);\
-+}
-+
-+#define SQUASHFS_SWAP_FRAGMENT_INDEXES(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n)
-+#define SQUASHFS_SWAP_LOOKUP_BLOCKS(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n)
-+
-+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
-+
-+struct squashfs_base_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+} __attribute__ ((packed));
-+
-+struct squashfs_ipc_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned int type:4;
-+ unsigned int offset:4;
-+} __attribute__ ((packed));
-+
-+struct squashfs_dev_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned short rdev;
-+} __attribute__ ((packed));
-+
-+struct squashfs_symlink_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned short symlink_size;
-+ char symlink[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_reg_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned int mtime;
-+ unsigned int start_block;
-+ unsigned int file_size:32;
-+ unsigned short block_list[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_inode_header_1 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:4; /* index into uid table */
-+ unsigned int guid:4; /* index into guid table */
-+ unsigned int file_size:19;
-+ unsigned int offset:13;
-+ unsigned int mtime;
-+ unsigned int start_block:24;
-+} __attribute__ ((packed));
-+
-+#define SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n) \
-+ SQUASHFS_MEMSET(s, d, n);\
-+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
-+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
-+ SQUASHFS_SWAP((s)->uid, d, 16, 4);\
-+ SQUASHFS_SWAP((s)->guid, d, 20, 4);
-+
-+#define SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, n) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n)\
-+}
-+
-+#define SQUASHFS_SWAP_IPC_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_ipc_inode_header_1));\
-+ SQUASHFS_SWAP((s)->type, d, 24, 4);\
-+ SQUASHFS_SWAP((s)->offset, d, 28, 4);\
-+}
-+
-+#define SQUASHFS_SWAP_DEV_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_dev_inode_header_1));\
-+ SQUASHFS_SWAP((s)->rdev, d, 24, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_symlink_inode_header_1));\
-+ SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_REG_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_reg_inode_header_1));\
-+ SQUASHFS_SWAP((s)->mtime, d, 24, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 56, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 88, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INODE_HEADER_1(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
-+ sizeof(struct squashfs_dir_inode_header_1));\
-+ SQUASHFS_SWAP((s)->file_size, d, 24, 19);\
-+ SQUASHFS_SWAP((s)->offset, d, 43, 13);\
-+ SQUASHFS_SWAP((s)->mtime, d, 56, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 88, 24);\
-+}
-+
-+#endif
-+
-+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
-+
-+struct squashfs_dir_index_2 {
-+ unsigned int index:27;
-+ unsigned int start_block:29;
-+ unsigned char size;
-+ unsigned char name[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_base_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+} __attribute__ ((packed));
-+
-+struct squashfs_ipc_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+} __attribute__ ((packed));
-+
-+struct squashfs_dev_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned short rdev;
-+} __attribute__ ((packed));
-+
-+struct squashfs_symlink_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned short symlink_size;
-+ char symlink[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_reg_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned int mtime;
-+ unsigned int start_block;
-+ unsigned int fragment;
-+ unsigned int offset;
-+ unsigned int file_size:32;
-+ unsigned short block_list[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned int file_size:19;
-+ unsigned int offset:13;
-+ unsigned int mtime;
-+ unsigned int start_block:24;
-+} __attribute__ ((packed));
-+
-+struct squashfs_ldir_inode_header_2 {
-+ unsigned int inode_type:4;
-+ unsigned int mode:12; /* protection */
-+ unsigned int uid:8; /* index into uid table */
-+ unsigned int guid:8; /* index into guid table */
-+ unsigned int file_size:27;
-+ unsigned int offset:13;
-+ unsigned int mtime;
-+ unsigned int start_block:24;
-+ unsigned int i_count:16;
-+ struct squashfs_dir_index_2 index[0];
-+} __attribute__ ((packed));
-+
-+union squashfs_inode_header_2 {
-+ struct squashfs_base_inode_header_2 base;
-+ struct squashfs_dev_inode_header_2 dev;
-+ struct squashfs_symlink_inode_header_2 symlink;
-+ struct squashfs_reg_inode_header_2 reg;
-+ struct squashfs_dir_inode_header_2 dir;
-+ struct squashfs_ldir_inode_header_2 ldir;
-+ struct squashfs_ipc_inode_header_2 ipc;
-+};
-+
-+struct squashfs_dir_header_2 {
-+ unsigned int count:8;
-+ unsigned int start_block:24;
-+} __attribute__ ((packed));
-+
-+struct squashfs_dir_entry_2 {
-+ unsigned int offset:13;
-+ unsigned int type:3;
-+ unsigned int size:8;
-+ char name[0];
-+} __attribute__ ((packed));
-+
-+struct squashfs_fragment_entry_2 {
-+ unsigned int start_block;
-+ unsigned int size;
-+} __attribute__ ((packed));
-+
-+#define SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
-+ SQUASHFS_MEMSET(s, d, n);\
-+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
-+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
-+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
-+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
-+
-+#define SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, n) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
-+}
-+
-+#define SQUASHFS_SWAP_IPC_INODE_HEADER_2(s, d) \
-+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, sizeof(struct squashfs_ipc_inode_header_2))
-+
-+#define SQUASHFS_SWAP_DEV_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_dev_inode_header_2)); \
-+ SQUASHFS_SWAP((s)->rdev, d, 32, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_symlink_inode_header_2));\
-+ SQUASHFS_SWAP((s)->symlink_size, d, 32, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_REG_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_reg_inode_header_2));\
-+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 64, 32);\
-+ SQUASHFS_SWAP((s)->fragment, d, 96, 32);\
-+ SQUASHFS_SWAP((s)->offset, d, 128, 32);\
-+ SQUASHFS_SWAP((s)->file_size, d, 160, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_dir_inode_header_2));\
-+ SQUASHFS_SWAP((s)->file_size, d, 32, 19);\
-+ SQUASHFS_SWAP((s)->offset, d, 51, 13);\
-+ SQUASHFS_SWAP((s)->mtime, d, 64, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 96, 24);\
-+}
-+
-+#define SQUASHFS_SWAP_LDIR_INODE_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
-+ sizeof(struct squashfs_ldir_inode_header_2));\
-+ SQUASHFS_SWAP((s)->file_size, d, 32, 27);\
-+ SQUASHFS_SWAP((s)->offset, d, 59, 13);\
-+ SQUASHFS_SWAP((s)->mtime, d, 72, 32);\
-+ SQUASHFS_SWAP((s)->start_block, d, 104, 24);\
-+ SQUASHFS_SWAP((s)->i_count, d, 128, 16);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_INDEX_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index_2));\
-+ SQUASHFS_SWAP((s)->index, d, 0, 27);\
-+ SQUASHFS_SWAP((s)->start_block, d, 27, 29);\
-+ SQUASHFS_SWAP((s)->size, d, 56, 8);\
-+}
-+#define SQUASHFS_SWAP_DIR_HEADER_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header_2));\
-+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
-+ SQUASHFS_SWAP((s)->start_block, d, 8, 24);\
-+}
-+
-+#define SQUASHFS_SWAP_DIR_ENTRY_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry_2));\
-+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
-+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
-+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
-+}
-+
-+#define SQUASHFS_SWAP_FRAGMENT_ENTRY_2(s, d) {\
-+ SQUASHFS_SWAP_START\
-+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry_2));\
-+ SQUASHFS_SWAP((s)->start_block, d, 0, 32);\
-+ SQUASHFS_SWAP((s)->size, d, 32, 32);\
-+}
-+
-+#define SQUASHFS_SWAP_FRAGMENT_INDEXES_2(s, d, n) SQUASHFS_SWAP_INTS(s, d, n)
-+
-+/* fragment and fragment table defines */
-+#define SQUASHFS_FRAGMENT_BYTES_2(A) (A * sizeof(struct squashfs_fragment_entry_2))
-+
-+#define SQUASHFS_FRAGMENT_INDEX_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEX_OFFSET_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) % \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEXES_2(A) ((SQUASHFS_FRAGMENT_BYTES_2(A) + \
-+ SQUASHFS_METADATA_SIZE - 1) / \
-+ SQUASHFS_METADATA_SIZE)
-+
-+#define SQUASHFS_FRAGMENT_INDEX_BYTES_2(A) (SQUASHFS_FRAGMENT_INDEXES_2(A) *\
-+ sizeof(int))
-+
-+#endif
-+
-+#ifdef __KERNEL__
-+
-+/*
-+ * macros used to swap each structure entry, taking into account
-+ * bitfields and different bitfield placing conventions on differing
-+ * architectures
-+ */
-+
-+#include <asm/byteorder.h>
-+
-+#ifdef __BIG_ENDIAN
-+ /* convert from little endian to big endian */
-+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
-+ tbits, b_pos)
-+#else
-+ /* convert from big endian to little endian */
-+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
-+ tbits, 64 - tbits - b_pos)
-+#endif
-+
-+#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\
-+ b_pos = pos % 8;\
-+ val = 0;\
-+ s = (unsigned char *)p + (pos / 8);\
-+ d = ((unsigned char *) &val) + 7;\
-+ for(bits = 0; bits < (tbits + b_pos); bits += 8) \
-+ *d-- = *s++;\
-+ value = (val >> (SHIFT))/* & ((1 << tbits) - 1)*/;\
-+}
-+
-+#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n);
-+
-+#endif
-+#endif
-diff -rduNp linux-2.6.22.1.oorig/include/linux/squashfs_fs_i.h linux-2.6.22.1/include/linux/squashfs_fs_i.h
---- linux-2.6.22.1.oorig/include/linux/squashfs_fs_i.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/include/linux/squashfs_fs_i.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,45 @@
-+#ifndef SQUASHFS_FS_I
-+#define SQUASHFS_FS_I
-+/*
-+ * Squashfs
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs_fs_i.h
-+ */
-+
-+struct squashfs_inode_info {
-+ long long start_block;
-+ unsigned int offset;
-+ union {
-+ struct {
-+ long long fragment_start_block;
-+ unsigned int fragment_size;
-+ unsigned int fragment_offset;
-+ long long block_list_start;
-+ } s1;
-+ struct {
-+ long long directory_index_start;
-+ unsigned int directory_index_offset;
-+ unsigned int directory_index_count;
-+ unsigned int parent_inode;
-+ } s2;
-+ } u;
-+ struct inode vfs_inode;
-+};
-+#endif
-diff -rduNp linux-2.6.22.1.oorig/include/linux/squashfs_fs_sb.h linux-2.6.22.1/include/linux/squashfs_fs_sb.h
---- linux-2.6.22.1.oorig/include/linux/squashfs_fs_sb.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/include/linux/squashfs_fs_sb.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,74 @@
-+#ifndef SQUASHFS_FS_SB
-+#define SQUASHFS_FS_SB
-+/*
-+ * Squashfs
-+ *
-+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
-+ * Phillip Lougher <phillip@lougher.org.uk>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2,
-+ * or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-+ *
-+ * squashfs_fs_sb.h
-+ */
-+
-+#include <linux/squashfs_fs.h>
-+
-+struct squashfs_cache {
-+ long long block;
-+ int length;
-+ long long next_index;
-+ char *data;
-+};
-+
-+struct squashfs_fragment_cache {
-+ long long block;
-+ int length;
-+ unsigned int locked;
-+ char *data;
-+};
-+
-+struct squashfs_sb_info {
-+ struct squashfs_super_block sblk;
-+ int devblksize;
-+ int devblksize_log2;
-+ int swap;
-+ struct squashfs_cache *block_cache;
-+ struct squashfs_fragment_cache *fragment;
-+ int next_cache;
-+ int next_fragment;
-+ int next_meta_index;
-+ unsigned int *uid;
-+ unsigned int *guid;
-+ long long *fragment_index;
-+ unsigned int *fragment_index_2;
-+ char *read_page;
-+ struct mutex read_data_mutex;
-+ struct mutex read_page_mutex;
-+ struct mutex block_cache_mutex;
-+ struct mutex fragment_mutex;
-+ struct mutex meta_index_mutex;
-+ wait_queue_head_t waitq;
-+ wait_queue_head_t fragment_wait_queue;
-+ struct meta_index *meta_index;
-+ z_stream stream;
-+ long long *inode_lookup_table;
-+ int (*read_inode)(struct inode *i, squashfs_inode_t \
-+ inode);
-+ long long (*read_blocklist)(struct inode *inode, int \
-+ index, int readahead_blks, char *block_list, \
-+ unsigned short **block_p, unsigned int *bsize);
-+ int (*read_fragment_index_table)(struct super_block *s);
-+};
-+#endif
-diff -rduNp linux-2.6.22.1.oorig/init/Kconfig linux-2.6.22.1/init/Kconfig
---- linux-2.6.22.1.oorig/init/Kconfig 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/init/Kconfig 2007-07-24 14:17:46.000000000 +0200
-@@ -246,23 +246,21 @@ config AUDITSYSCALL
- ensure that INOTIFY is configured.
-
- config IKCONFIG
-- tristate "Kernel .config support"
-+ tristate "Kernel .miniconfig support"
- ---help---
-- This option enables the complete Linux kernel ".config" file
-+ This option enables the mini Linux kernel ".miniconfig" file
- contents to be saved in the kernel. It provides documentation
- of which kernel options are used in a running kernel or in an
-- on-disk kernel. This information can be extracted from the kernel
-- image file with the script scripts/extract-ikconfig and used as
-- input to rebuild the current kernel or to build another kernel.
-- It can also be extracted from a running kernel by reading
-- /proc/config.gz if enabled (below).
-+ on-disk kernel.
-+ It can be extracted from a running kernel by reading
-+ /proc/miniconfig.gz if enabled (below).
-
- config IKCONFIG_PROC
-- bool "Enable access to .config through /proc/config.gz"
-+ bool "Enable access to .miniconfig through /proc/miniconfig.gz"
- depends on IKCONFIG && PROC_FS
- ---help---
- This option enables access to the kernel configuration file
-- through /proc/config.gz.
-+ through /proc/miniconfig.gz.
-
- config LOG_BUF_SHIFT
- int "Kernel log buffer size (16 => 64KB, 17 => 128KB)"
-diff -rduNp linux-2.6.22.1.oorig/init/LzmaDecode.c linux-2.6.22.1/init/LzmaDecode.c
---- linux-2.6.22.1.oorig/init/LzmaDecode.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/init/LzmaDecode.c 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,588 @@
-+/*
-+ LzmaDecode.c
-+ LZMA Decoder (optimized for Speed version)
-+
-+ LZMA SDK 4.22 Copyright (c) 1999-2005 Igor Pavlov (2005-06-10)
-+ http://www.7-zip.org/
-+
-+ LZMA SDK is licensed under two licenses:
-+ 1) GNU Lesser General Public License (GNU LGPL)
-+ 2) Common Public License (CPL)
-+ It means that you can select one of these two licenses and
-+ follow rules of that license.
-+
-+ SPECIAL EXCEPTION:
-+ Igor Pavlov, as the author of this Code, expressly permits you to
-+ statically or dynamically link your Code (or bind by name) to the
-+ interfaces of this file without subjecting your linked Code to the
-+ terms of the CPL or GNU LGPL. Any modifications or additions
-+ to this file, however, are subject to the LGPL or CPL terms.
-+*/
-+
-+#include "LzmaDecode.h"
-+
-+#ifndef Byte
-+#define Byte unsigned char
-+#endif
-+
-+#define kNumTopBits 24
-+#define kTopValue ((UInt32)1 << kNumTopBits)
-+
-+#define kNumBitModelTotalBits 11
-+#define kBitModelTotal (1 << kNumBitModelTotalBits)
-+#define kNumMoveBits 5
-+
-+#define RC_READ_BYTE (*Buffer++)
-+
-+#define RC_INIT2 Code = 0; Range = 0xFFFFFFFF; \
-+ { int i; for(i = 0; i < 5; i++) { RC_TEST; Code = (Code << 8) | RC_READ_BYTE; }}
-+
-+#ifdef _LZMA_IN_CB
-+
-+#define RC_TEST { if (Buffer == BufferLim) \
-+ { SizeT size; int result = InCallback->Read(InCallback, &Buffer, &size); if (result != LZMA_RESULT_OK) return result; \
-+ BufferLim = Buffer + size; if (size == 0) return LZMA_RESULT_DATA_ERROR; }}
-+
-+#define RC_INIT Buffer = BufferLim = 0; RC_INIT2
-+
-+#else
-+
-+#define RC_TEST { if (Buffer == BufferLim) return LZMA_RESULT_DATA_ERROR; }
-+
-+#define RC_INIT(buffer, bufferSize) Buffer = buffer; BufferLim = buffer + bufferSize; RC_INIT2
-+
-+#endif
-+
-+#define RC_NORMALIZE if (Range < kTopValue) { RC_TEST; Range <<= 8; Code = (Code << 8) | RC_READ_BYTE; }
-+
-+#define IfBit0(p) RC_NORMALIZE; bound = (Range >> kNumBitModelTotalBits) * *(p); if (Code < bound)
-+#define UpdateBit0(p) Range = bound; *(p) += (kBitModelTotal - *(p)) >> kNumMoveBits;
-+#define UpdateBit1(p) Range -= bound; Code -= bound; *(p) -= (*(p)) >> kNumMoveBits;
-+
-+#define RC_GET_BIT2(p, mi, A0, A1) IfBit0(p) \
-+ { UpdateBit0(p); mi <<= 1; A0; } else \
-+ { UpdateBit1(p); mi = (mi + mi) + 1; A1; }
-+
-+#define RC_GET_BIT(p, mi) RC_GET_BIT2(p, mi, ; , ;)
-+
-+#define RangeDecoderBitTreeDecode(probs, numLevels, res) \
-+ { int i = numLevels; res = 1; \
-+ do { CProb *p = probs + res; RC_GET_BIT(p, res) } while(--i != 0); \
-+ res -= (1 << numLevels); }
-+
-+
-+#define kNumPosBitsMax 4
-+#define kNumPosStatesMax (1 << kNumPosBitsMax)
-+
-+#define kLenNumLowBits 3
-+#define kLenNumLowSymbols (1 << kLenNumLowBits)
-+#define kLenNumMidBits 3
-+#define kLenNumMidSymbols (1 << kLenNumMidBits)
-+#define kLenNumHighBits 8
-+#define kLenNumHighSymbols (1 << kLenNumHighBits)
-+
-+#define LenChoice 0
-+#define LenChoice2 (LenChoice + 1)
-+#define LenLow (LenChoice2 + 1)
-+#define LenMid (LenLow + (kNumPosStatesMax << kLenNumLowBits))
-+#define LenHigh (LenMid + (kNumPosStatesMax << kLenNumMidBits))
-+#define kNumLenProbs (LenHigh + kLenNumHighSymbols)
-+
-+
-+#define kNumStates 12
-+#define kNumLitStates 7
-+
-+#define kStartPosModelIndex 4
-+#define kEndPosModelIndex 14
-+#define kNumFullDistances (1 << (kEndPosModelIndex >> 1))
-+
-+#define kNumPosSlotBits 6
-+#define kNumLenToPosStates 4
-+
-+#define kNumAlignBits 4
-+#define kAlignTableSize (1 << kNumAlignBits)
-+
-+#define kMatchMinLen 2
-+
-+#define IsMatch 0
-+#define IsRep (IsMatch + (kNumStates << kNumPosBitsMax))
-+#define IsRepG0 (IsRep + kNumStates)
-+#define IsRepG1 (IsRepG0 + kNumStates)
-+#define IsRepG2 (IsRepG1 + kNumStates)
-+#define IsRep0Long (IsRepG2 + kNumStates)
-+#define PosSlot (IsRep0Long + (kNumStates << kNumPosBitsMax))
-+#define SpecPos (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))
-+#define Align (SpecPos + kNumFullDistances - kEndPosModelIndex)
-+#define LenCoder (Align + kAlignTableSize)
-+#define RepLenCoder (LenCoder + kNumLenProbs)
-+#define Literal (RepLenCoder + kNumLenProbs)
-+
-+#if Literal != LZMA_BASE_SIZE
-+StopCompilingDueBUG
-+#endif
-+
-+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size)
-+{
-+ unsigned char prop0;
-+ if (size < LZMA_PROPERTIES_SIZE)
-+ return LZMA_RESULT_DATA_ERROR;
-+ prop0 = propsData[0];
-+ if (prop0 >= (9 * 5 * 5))
-+ return LZMA_RESULT_DATA_ERROR;
-+ {
-+ for (propsRes->pb = 0; prop0 >= (9 * 5); propsRes->pb++, prop0 -= (9 * 5));
-+ for (propsRes->lp = 0; prop0 >= 9; propsRes->lp++, prop0 -= 9);
-+ propsRes->lc = prop0;
-+ /*
-+ unsigned char remainder = (unsigned char)(prop0 / 9);
-+ propsRes->lc = prop0 % 9;
-+ propsRes->pb = remainder / 5;
-+ propsRes->lp = remainder % 5;
-+ */
-+ }
-+
-+ #ifdef _LZMA_OUT_READ
-+ {
-+ int i;
-+ propsRes->DictionarySize = 0;
-+ for (i = 0; i < 4; i++)
-+ propsRes->DictionarySize += (UInt32)(propsData[1 + i]) << (i * 8);
-+ if (propsRes->DictionarySize == 0)
-+ propsRes->DictionarySize = 1;
-+ }
-+ #endif
-+ return LZMA_RESULT_OK;
-+}
-+
-+#define kLzmaStreamWasFinishedId (-1)
-+
-+int LzmaDecode(CLzmaDecoderState *vs,
-+ #ifdef _LZMA_IN_CB
-+ ILzmaInCallback *InCallback,
-+ #else
-+ const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
-+ #endif
-+ unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed)
-+{
-+ CProb *p = vs->Probs;
-+ SizeT nowPos = 0;
-+ Byte previousByte = 0;
-+ UInt32 posStateMask = (1 << (vs->Properties.pb)) - 1;
-+ UInt32 literalPosMask = (1 << (vs->Properties.lp)) - 1;
-+ int lc = vs->Properties.lc;
-+
-+ #ifdef _LZMA_OUT_READ
-+
-+ UInt32 Range = vs->Range;
-+ UInt32 Code = vs->Code;
-+ #ifdef _LZMA_IN_CB
-+ const Byte *Buffer = vs->Buffer;
-+ const Byte *BufferLim = vs->BufferLim;
-+ #else
-+ const Byte *Buffer = inStream;
-+ const Byte *BufferLim = inStream + inSize;
-+ #endif
-+ int state = vs->State;
-+ UInt32 rep0 = vs->Reps[0], rep1 = vs->Reps[1], rep2 = vs->Reps[2], rep3 = vs->Reps[3];
-+ int len = vs->RemainLen;
-+ UInt32 globalPos = vs->GlobalPos;
-+ UInt32 distanceLimit = vs->DistanceLimit;
-+
-+ Byte *dictionary = vs->Dictionary;
-+ UInt32 dictionarySize = vs->Properties.DictionarySize;
-+ UInt32 dictionaryPos = vs->DictionaryPos;
-+
-+ Byte tempDictionary[4];
-+
-+ #ifndef _LZMA_IN_CB
-+ *inSizeProcessed = 0;
-+ #endif
-+ *outSizeProcessed = 0;
-+ if (len == kLzmaStreamWasFinishedId)
-+ return LZMA_RESULT_OK;
-+
-+ if (dictionarySize == 0)
-+ {
-+ dictionary = tempDictionary;
-+ dictionarySize = 1;
-+ tempDictionary[0] = vs->TempDictionary[0];
-+ }
-+
-+ if (len == kLzmaNeedInitId)
-+ {
-+ {
-+ UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
-+ UInt32 i;
-+ for (i = 0; i < numProbs; i++)
-+ p[i] = kBitModelTotal >> 1;
-+ rep0 = rep1 = rep2 = rep3 = 1;
-+ state = 0;
-+ globalPos = 0;
-+ distanceLimit = 0;
-+ dictionaryPos = 0;
-+ dictionary[dictionarySize - 1] = 0;
-+ #ifdef _LZMA_IN_CB
-+ RC_INIT;
-+ #else
-+ RC_INIT(inStream, inSize);
-+ #endif
-+ }
-+ len = 0;
-+ }
-+ while(len != 0 && nowPos < outSize)
-+ {
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ outStream[nowPos++] = dictionary[dictionaryPos] = dictionary[pos];
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ len--;
-+ }
-+ if (dictionaryPos == 0)
-+ previousByte = dictionary[dictionarySize - 1];
-+ else
-+ previousByte = dictionary[dictionaryPos - 1];
-+
-+ #else /* if !_LZMA_OUT_READ */
-+
-+ int state = 0;
-+ UInt32 rep0 = 1, rep1 = 1, rep2 = 1, rep3 = 1;
-+ int len = 0;
-+ const Byte *Buffer;
-+ const Byte *BufferLim;
-+ UInt32 Range;
-+ UInt32 Code;
-+
-+ #ifndef _LZMA_IN_CB
-+ *inSizeProcessed = 0;
-+ #endif
-+ *outSizeProcessed = 0;
-+
-+ {
-+ UInt32 i;
-+ UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
-+ for (i = 0; i < numProbs; i++)
-+ p[i] = kBitModelTotal >> 1;
-+ }
-+
-+ #ifdef _LZMA_IN_CB
-+ RC_INIT;
-+ #else
-+ RC_INIT(inStream, inSize);
-+ #endif
-+
-+ #endif /* _LZMA_OUT_READ */
-+
-+ while(nowPos < outSize)
-+ {
-+ CProb *prob;
-+ UInt32 bound;
-+ int posState = (int)(
-+ (nowPos
-+ #ifdef _LZMA_OUT_READ
-+ + globalPos
-+ #endif
-+ )
-+ & posStateMask);
-+
-+ prob = p + IsMatch + (state << kNumPosBitsMax) + posState;
-+ IfBit0(prob)
-+ {
-+ int symbol = 1;
-+ UpdateBit0(prob)
-+ prob = p + Literal + (LZMA_LIT_SIZE *
-+ (((
-+ (nowPos
-+ #ifdef _LZMA_OUT_READ
-+ + globalPos
-+ #endif
-+ )
-+ & literalPosMask) << lc) + (previousByte >> (8 - lc))));
-+
-+ if (state >= kNumLitStates)
-+ {
-+ int matchByte;
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ matchByte = dictionary[pos];
-+ #else
-+ matchByte = outStream[nowPos - rep0];
-+ #endif
-+ do
-+ {
-+ int bit;
-+ CProb *probLit;
-+ matchByte <<= 1;
-+ bit = (matchByte & 0x100);
-+ probLit = prob + 0x100 + bit + symbol;
-+ RC_GET_BIT2(probLit, symbol, if (bit != 0) break, if (bit == 0) break)
-+ }
-+ while (symbol < 0x100);
-+ }
-+ while (symbol < 0x100)
-+ {
-+ CProb *probLit = prob + symbol;
-+ RC_GET_BIT(probLit, symbol)
-+ }
-+ previousByte = (Byte)symbol;
-+
-+ outStream[nowPos++] = previousByte;
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit < dictionarySize)
-+ distanceLimit++;
-+
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #endif
-+ if (state < 4) state = 0;
-+ else if (state < 10) state -= 3;
-+ else state -= 6;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRep + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ rep3 = rep2;
-+ rep2 = rep1;
-+ rep1 = rep0;
-+ state = state < kNumLitStates ? 0 : 3;
-+ prob = p + LenCoder;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRepG0 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ prob = p + IsRep0Long + (state << kNumPosBitsMax) + posState;
-+ IfBit0(prob)
-+ {
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos;
-+ #endif
-+ UpdateBit0(prob);
-+
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit == 0)
-+ #else
-+ if (nowPos == 0)
-+ #endif
-+ return LZMA_RESULT_DATA_ERROR;
-+
-+ state = state < kNumLitStates ? 9 : 11;
-+ #ifdef _LZMA_OUT_READ
-+ pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ previousByte = dictionary[pos];
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #else
-+ previousByte = outStream[nowPos - rep0];
-+ #endif
-+ outStream[nowPos++] = previousByte;
-+ #ifdef _LZMA_OUT_READ
-+ if (distanceLimit < dictionarySize)
-+ distanceLimit++;
-+ #endif
-+
-+ continue;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ }
-+ }
-+ else
-+ {
-+ UInt32 distance;
-+ UpdateBit1(prob);
-+ prob = p + IsRepG1 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ distance = rep1;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ prob = p + IsRepG2 + state;
-+ IfBit0(prob)
-+ {
-+ UpdateBit0(prob);
-+ distance = rep2;
-+ }
-+ else
-+ {
-+ UpdateBit1(prob);
-+ distance = rep3;
-+ rep3 = rep2;
-+ }
-+ rep2 = rep1;
-+ }
-+ rep1 = rep0;
-+ rep0 = distance;
-+ }
-+ state = state < kNumLitStates ? 8 : 11;
-+ prob = p + RepLenCoder;
-+ }
-+ {
-+ int numBits, offset;
-+ CProb *probLen = prob + LenChoice;
-+ IfBit0(probLen)
-+ {
-+ UpdateBit0(probLen);
-+ probLen = prob + LenLow + (posState << kLenNumLowBits);
-+ offset = 0;
-+ numBits = kLenNumLowBits;
-+ }
-+ else
-+ {
-+ UpdateBit1(probLen);
-+ probLen = prob + LenChoice2;
-+ IfBit0(probLen)
-+ {
-+ UpdateBit0(probLen);
-+ probLen = prob + LenMid + (posState << kLenNumMidBits);
-+ offset = kLenNumLowSymbols;
-+ numBits = kLenNumMidBits;
-+ }
-+ else
-+ {
-+ UpdateBit1(probLen);
-+ probLen = prob + LenHigh;
-+ offset = kLenNumLowSymbols + kLenNumMidSymbols;
-+ numBits = kLenNumHighBits;
-+ }
-+ }
-+ RangeDecoderBitTreeDecode(probLen, numBits, len);
-+ len += offset;
-+ }
-+
-+ if (state < 4)
-+ {
-+ int posSlot;
-+ state += kNumLitStates;
-+ prob = p + PosSlot +
-+ ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) <<
-+ kNumPosSlotBits);
-+ RangeDecoderBitTreeDecode(prob, kNumPosSlotBits, posSlot);
-+ if (posSlot >= kStartPosModelIndex)
-+ {
-+ int numDirectBits = ((posSlot >> 1) - 1);
-+ rep0 = (2 | ((UInt32)posSlot & 1));
-+ if (posSlot < kEndPosModelIndex)
-+ {
-+ rep0 <<= numDirectBits;
-+ prob = p + SpecPos + rep0 - posSlot - 1;
-+ }
-+ else
-+ {
-+ numDirectBits -= kNumAlignBits;
-+ do
-+ {
-+ RC_NORMALIZE
-+ Range >>= 1;
-+ rep0 <<= 1;
-+ if (Code >= Range)
-+ {
-+ Code -= Range;
-+ rep0 |= 1;
-+ }
-+ }
-+ while (--numDirectBits != 0);
-+ prob = p + Align;
-+ rep0 <<= kNumAlignBits;
-+ numDirectBits = kNumAlignBits;
-+ }
-+ {
-+ int i = 1;
-+ int mi = 1;
-+ do
-+ {
-+ CProb *prob3 = prob + mi;
-+ RC_GET_BIT2(prob3, mi, ; , rep0 |= i);
-+ i <<= 1;
-+ }
-+ while(--numDirectBits != 0);
-+ }
-+ }
-+ else
-+ rep0 = posSlot;
-+ if (++rep0 == (UInt32)(0))
-+ {
-+ /* it's for stream version */
-+ len = kLzmaStreamWasFinishedId;
-+ break;
-+ }
-+ }
-+
-+ len += kMatchMinLen;
-+ #ifdef _LZMA_OUT_READ
-+ if (rep0 > distanceLimit)
-+ #else
-+ if (rep0 > nowPos)
-+ #endif
-+ return LZMA_RESULT_DATA_ERROR;
-+
-+ #ifdef _LZMA_OUT_READ
-+ if (dictionarySize - distanceLimit > (UInt32)len)
-+ distanceLimit += len;
-+ else
-+ distanceLimit = dictionarySize;
-+ #endif
-+
-+ do
-+ {
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 pos = dictionaryPos - rep0;
-+ if (pos >= dictionarySize)
-+ pos += dictionarySize;
-+ previousByte = dictionary[pos];
-+ dictionary[dictionaryPos] = previousByte;
-+ if (++dictionaryPos == dictionarySize)
-+ dictionaryPos = 0;
-+ #else
-+ previousByte = outStream[nowPos - rep0];
-+ #endif
-+ len--;
-+ outStream[nowPos++] = previousByte;
-+ }
-+ while(len != 0 && nowPos < outSize);
-+ }
-+ }
-+ RC_NORMALIZE;
-+
-+ #ifdef _LZMA_OUT_READ
-+ vs->Range = Range;
-+ vs->Code = Code;
-+ vs->DictionaryPos = dictionaryPos;
-+ vs->GlobalPos = globalPos + (UInt32)nowPos;
-+ vs->DistanceLimit = distanceLimit;
-+ vs->Reps[0] = rep0;
-+ vs->Reps[1] = rep1;
-+ vs->Reps[2] = rep2;
-+ vs->Reps[3] = rep3;
-+ vs->State = state;
-+ vs->RemainLen = len;
-+ vs->TempDictionary[0] = tempDictionary[0];
-+ #endif
-+
-+ #ifdef _LZMA_IN_CB
-+ vs->Buffer = Buffer;
-+ vs->BufferLim = BufferLim;
-+ #else
-+ *inSizeProcessed = (SizeT)(Buffer - inStream);
-+ #endif
-+ *outSizeProcessed = nowPos;
-+ return LZMA_RESULT_OK;
-+}
-diff -rduNp linux-2.6.22.1.oorig/init/LzmaDecode.h linux-2.6.22.1/init/LzmaDecode.h
---- linux-2.6.22.1.oorig/init/LzmaDecode.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/init/LzmaDecode.h 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,131 @@
-+/*
-+ LzmaDecode.h
-+ LZMA Decoder interface
-+
-+ LZMA SDK 4.21 Copyright (c) 1999-2005 Igor Pavlov (2005-06-08)
-+ http://www.7-zip.org/
-+
-+ LZMA SDK is licensed under two licenses:
-+ 1) GNU Lesser General Public License (GNU LGPL)
-+ 2) Common Public License (CPL)
-+ It means that you can select one of these two licenses and
-+ follow rules of that license.
-+
-+ SPECIAL EXCEPTION:
-+ Igor Pavlov, as the author of this code, expressly permits you to
-+ statically or dynamically link your code (or bind by name) to the
-+ interfaces of this file without subjecting your linked code to the
-+ terms of the CPL or GNU LGPL. Any modifications or additions
-+ to this file, however, are subject to the LGPL or CPL terms.
-+*/
-+
-+#ifndef __LZMADECODE_H
-+#define __LZMADECODE_H
-+
-+/* #define _LZMA_IN_CB */
-+/* Use callback for input data */
-+
-+/* #define _LZMA_OUT_READ */
-+/* Use read function for output data */
-+
-+/* #define _LZMA_PROB32 */
-+/* It can increase speed on some 32-bit CPUs,
-+ but memory usage will be doubled in that case */
-+
-+/* #define _LZMA_LOC_OPT */
-+/* Enable local speed optimizations inside code */
-+
-+/* #define _LZMA_SYSTEM_SIZE_T */
-+/* Use system's size_t. You can use it to enable 64-bit sizes supporting*/
-+
-+#ifndef UInt32
-+#ifdef _LZMA_UINT32_IS_ULONG
-+#define UInt32 unsigned long
-+#else
-+#define UInt32 unsigned int
-+#endif
-+#endif
-+
-+#ifndef SizeT
-+#ifdef _LZMA_SYSTEM_SIZE_T
-+#include <stddef.h>
-+#define SizeT size_t
-+#else
-+#define SizeT UInt32
-+#endif
-+#endif
-+
-+#ifdef _LZMA_PROB32
-+#define CProb UInt32
-+#else
-+#define CProb unsigned short
-+#endif
-+
-+#define LZMA_RESULT_OK 0
-+#define LZMA_RESULT_DATA_ERROR 1
-+
-+#ifdef _LZMA_IN_CB
-+typedef struct _ILzmaInCallback
-+{
-+ int (*Read)(void *object, const unsigned char **buffer, SizeT *bufferSize);
-+} ILzmaInCallback;
-+#endif
-+
-+#define LZMA_BASE_SIZE 1846
-+#define LZMA_LIT_SIZE 768
-+
-+#define LZMA_PROPERTIES_SIZE 5
-+
-+typedef struct _CLzmaProperties
-+{
-+ int lc;
-+ int lp;
-+ int pb;
-+ #ifdef _LZMA_OUT_READ
-+ UInt32 DictionarySize;
-+ #endif
-+}CLzmaProperties;
-+
-+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size);
-+
-+#define LzmaGetNumProbs(Properties) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((Properties)->lc + (Properties)->lp)))
-+
-+#define kLzmaNeedInitId (-2)
-+
-+typedef struct _CLzmaDecoderState
-+{
-+ CLzmaProperties Properties;
-+ CProb *Probs;
-+
-+ #ifdef _LZMA_IN_CB
-+ const unsigned char *Buffer;
-+ const unsigned char *BufferLim;
-+ #endif
-+
-+ #ifdef _LZMA_OUT_READ
-+ unsigned char *Dictionary;
-+ UInt32 Range;
-+ UInt32 Code;
-+ UInt32 DictionaryPos;
-+ UInt32 GlobalPos;
-+ UInt32 DistanceLimit;
-+ UInt32 Reps[4];
-+ int State;
-+ int RemainLen;
-+ unsigned char TempDictionary[4];
-+ #endif
-+} CLzmaDecoderState;
-+
-+#ifdef _LZMA_OUT_READ
-+#define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; }
-+#endif
-+
-+int LzmaDecode(CLzmaDecoderState *vs,
-+ #ifdef _LZMA_IN_CB
-+ ILzmaInCallback *inCallback,
-+ #else
-+ const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
-+ #endif
-+ unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed);
-+
-+#endif
-diff -rduNp linux-2.6.22.1.oorig/init/do_mounts_rd.c linux-2.6.22.1/init/do_mounts_rd.c
---- linux-2.6.22.1.oorig/init/do_mounts_rd.c 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/init/do_mounts_rd.c 2007-07-24 14:17:46.000000000 +0200
-@@ -5,7 +5,9 @@
- #include <linux/ext2_fs.h>
- #include <linux/romfs_fs.h>
- #include <linux/cramfs_fs.h>
-+#include <linux/squashfs_fs.h>
- #include <linux/initrd.h>
-+#include <linux/vmalloc.h>
- #include <linux/string.h>
-
- #include "do_mounts.h"
-@@ -31,6 +33,9 @@ static int __init ramdisk_start_setup(ch
- __setup("ramdisk_start=", ramdisk_start_setup);
-
- static int __init crd_load(int in_fd, int out_fd);
-+#ifdef CONFIG_LZMA_INITRD
-+static int __init lzma_rd_load(int in_fd, int out_fd);
-+#endif
-
- /*
- * This routine tries to find a RAM disk image to load, and returns the
-@@ -39,6 +44,7 @@ static int __init crd_load(int in_fd, in
- * numbers could not be found.
- *
- * We currently check for the following magic numbers:
-+ * squashfs
- * minix
- * ext2
- * romfs
-@@ -53,6 +59,7 @@ identify_ramdisk_image(int fd, int start
- struct ext2_super_block *ext2sb;
- struct romfs_super_block *romfsb;
- struct cramfs_super *cramfsb;
-+ struct squashfs_super_block *squashfsb;
- int nblocks = -1;
- unsigned char *buf;
-
-@@ -64,6 +71,7 @@ identify_ramdisk_image(int fd, int start
- ext2sb = (struct ext2_super_block *) buf;
- romfsb = (struct romfs_super_block *) buf;
- cramfsb = (struct cramfs_super *) buf;
-+ squashfsb = (struct squashfs_super_block *) buf;
- memset(buf, 0xe5, size);
-
- /*
-@@ -82,6 +90,17 @@ identify_ramdisk_image(int fd, int start
- nblocks = 0;
- goto done;
- }
-+ /*
-+ * handle lzma compressed initrd, returns nblocks=1 as indication
-+ */
-+ if( buf[0] < 9 * 5 * 5 && buf[9] == 0 && buf[10] == 0 && buf[11] == 0
-+ && buf[12] == 0 )
-+ {
-+ printk( KERN_NOTICE "RAMDISK: LZMA image found at block %d\n",
-+ start_block);
-+ nblocks = 1; // just a convenient return flag
-+ goto done;
-+ }
-
- /* romfs is at block zero too */
- if (romfsb->word0 == ROMSB_WORD0 &&
-@@ -101,6 +120,18 @@ identify_ramdisk_image(int fd, int start
- goto done;
- }
-
-+ /* squashfs is at block zero too */
-+ if (squashfsb->s_magic == SQUASHFS_MAGIC) {
-+ printk(KERN_NOTICE
-+ "RAMDISK: squashfs filesystem found at block %d\n",
-+ start_block);
-+ if (squashfsb->s_major < 3)
-+ nblocks = (squashfsb->bytes_used_2+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
-+ else
-+ nblocks = (squashfsb->bytes_used+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
-+ goto done;
-+ }
-+
- /*
- * Read block 1 to test for minix and ext2 superblock
- */
-@@ -172,7 +203,22 @@ int __init rd_load_image(char *from)
- #endif
- goto done;
- }
--
-+#ifdef CONFIG_LZMA_INITRD
-+ /*
-+ * handle lzma compressed image
-+ */
-+ if ( nblocks == 1 )
-+ {
-+ nblocks = 0;
-+ if ( lzma_rd_load(in_fd, out_fd) == 0 )
-+ {
-+ printk("\nLZMA initrd loaded successfully\n");
-+ goto successful_load;
-+ }
-+ printk(KERN_NOTICE "LZMA initrd is not in the correct format\n");
-+ goto done;
-+ }
-+#endif
- /*
- * NOTE NOTE: nblocks is not actually blocks but
- * the number of kibibytes of data to load into a ramdisk.
-@@ -393,6 +439,134 @@ static void __init error(char *x)
- unzip_error = 1;
- }
-
-+#ifdef CONFIG_LZMA_INITRD
-+#define _LZMA_IN_CB
-+#define _LZMA_OUT_READ
-+#include "LzmaDecode.h"
-+#include "LzmaDecode.c"
-+
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize);
-+
-+/*
-+ * Do the lzma decompression
-+ */
-+static int __init lzma_rd_load(int in_fd, int out_fd)
-+{
-+ unsigned int i;
-+ CLzmaDecoderState state;
-+ unsigned char* outputbuffer;
-+ unsigned int uncompressedSize = 0;
-+ unsigned char* p;
-+ unsigned int kBlockSize = 0x10000;
-+ unsigned int nowPos = 0;
-+ unsigned int outsizeProcessed = 0;
-+ int res;
-+ ILzmaInCallback callback;
-+
-+ insize = 0; /* valid bytes in inbuf */
-+ inptr = 0; /* index of next byte to be processed in inbuf */
-+ exit_code = 0;
-+ crd_infd = in_fd;
-+ inbuf = kmalloc(INBUFSIZ, GFP_KERNEL);
-+ if (inbuf == 0)
-+ {
-+ printk(KERN_ERR "RAMDISK: Couldn't allocate lzma input buffer\n");
-+ return -1;
-+ }
-+
-+ callback.Read = read_byte;
-+
-+ /* lzma args */
-+ i = get_byte();
-+ state.Properties.lc = i % 9, i = i / 9;
-+ state.Properties.lp = i % 5, state.Properties.pb = i / 5;
-+
-+ /* read dictionary size */
-+ p = (char*)&state.Properties.DictionarySize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ /* get uncompressedSize */
-+ p= (char*)&uncompressedSize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ /* skip big file */
-+ for (i = 0; i < 4; i++)
-+ get_byte();
-+
-+ printk( KERN_NOTICE "RAMDISK: LZMA lc=%d,lp=%d,pb=%d,dictSize=%d,origSize=%d\n",
-+ state.Properties.lc, state.Properties.lp, state.Properties.pb, state.Properties.DictionarySize, uncompressedSize);
-+ outputbuffer = kmalloc(kBlockSize, GFP_KERNEL);
-+ if (outputbuffer == 0) {
-+ printk(KERN_ERR "RAMDISK: Couldn't allocate lzma output buffer\n");
-+ return -1;
-+ }
-+
-+ state.Probs = (CProb*)kmalloc( LzmaGetNumProbs(&state.Properties)*sizeof(CProb), GFP_KERNEL);
-+ if ( state.Probs == 0) {
-+ printk(KERN_ERR "RAMDISK: Couldn't allocate lzma workspace\n");
-+ return -1;
-+ }
-+
-+#ifdef CONFIG_LZMA_INITRD_KMALLOC_ONLY
-+ state.Dictionary = kmalloc( state.Properties.DictionarySize, GFP_KERNEL);
-+#else
-+ state.Dictionary = vmalloc( state.Properties.DictionarySize);
-+#endif
-+ if ( state.Dictionary == 0) {
-+ printk(KERN_ERR "RAMDISK: Couldn't allocate lzma dictionary\n");
-+ return -1;
-+ }
-+
-+ printk( KERN_NOTICE "LZMA initrd by Ming-Ching Tiew <mctiew@yahoo.com> " );
-+
-+ LzmaDecoderInit( &state );
-+
-+ for( nowPos =0; nowPos < uncompressedSize ; )
-+ {
-+ UInt32 blockSize = uncompressedSize - nowPos;
-+ if( blockSize > kBlockSize)
-+ blockSize = kBlockSize;
-+ res = LzmaDecode( &state, &callback, outputbuffer, blockSize, &outsizeProcessed);
-+ if( res != 0 ) {
-+ printk( KERN_ERR "RAMDISK: Lzma decode failure\n");
-+ return -1;
-+ }
-+ if( outsizeProcessed == 0 )
-+ {
-+ uncompressedSize = nowPos;
-+ printk( KERN_NOTICE "RAMDISK nowPos=%d, uncompressedSize=%d\n",
-+ nowPos, uncompressedSize );
-+ break;
-+ }
-+ sys_write(out_fd, outputbuffer, outsizeProcessed );
-+ nowPos += outsizeProcessed;
-+ printk( ".");
-+ }
-+
-+#ifdef CONFIG_LZMA_INITRD_KMALLOC_ONLY
-+ kfree(state.Dictionary);
-+#else
-+ vfree(state.Dictionary);
-+#endif
-+ kfree(inbuf);
-+ kfree(outputbuffer);
-+ kfree(state.Probs);
-+ return 0;
-+}
-+
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize)
-+{
-+ static unsigned char val;
-+ *bufferSize = 1;
-+ val = get_byte();
-+ *buffer = &val;
-+ return LZMA_RESULT_OK;
-+}
-+
-+#endif /*CONFIG_LZMA_INITRD*/
-+
- static int __init crd_load(int in_fd, int out_fd)
- {
- int result;
-diff -rduNp linux-2.6.22.1.oorig/init/initramfs.c linux-2.6.22.1/init/initramfs.c
---- linux-2.6.22.1.oorig/init/initramfs.c 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/init/initramfs.c 2007-07-24 14:17:46.000000000 +0200
-@@ -6,6 +6,7 @@
- #include <linux/delay.h>
- #include <linux/string.h>
- #include <linux/syscalls.h>
-+#include <linux/vmalloc.h>
-
- static __initdata char *message;
- static void __init error(char *x)
-@@ -441,6 +442,118 @@ static void __init flush_window(void)
- outcnt = 0;
- }
-
-+#ifdef CONFIG_LZMA_INITRAM_FS
-+#define _LZMA_IN_CB
-+#define _LZMA_OUT_READ
-+#include "LzmaDecode.h"
-+#ifndef CONFIG_LZMA_INITRD
-+ #include "LzmaDecode.c"
-+#endif
-+static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize)
-+{
-+ static unsigned char val;
-+ *bufferSize = 1;
-+ val = get_byte();
-+ *buffer = &val;
-+ return LZMA_RESULT_OK;
-+}
-+
-+static int __init lzma_unzip(void)
-+{
-+ unsigned int i;
-+ CLzmaDecoderState state;
-+ unsigned char* outputbuffer;
-+ unsigned int uncompressedSize = 0;
-+ unsigned char* p;
-+ unsigned int kBlockSize = 0x10000;
-+ unsigned int nowPos = 0;
-+ unsigned int outsizeProcessed = 0;
-+ int res;
-+ ILzmaInCallback callback;
-+
-+ callback.Read = read_byte;
-+
-+ // lzma args
-+ i = get_byte();
-+ state.Properties.lc = i % 9, i = i / 9;
-+ state.Properties.lp = i % 5, state.Properties.pb = i / 5;
-+
-+ // read dictionary size
-+ p = (char*)&state.Properties.DictionarySize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ // get uncompressedSize
-+ p= (char*)&uncompressedSize;
-+ for (i = 0; i < 4; i++)
-+ *p++ = get_byte();
-+
-+ // skip big file
-+ for (i = 0; i < 4; i++)
-+ get_byte();
-+
-+ printk( KERN_NOTICE "initramfs: LZMA lc=%d,lp=%d,pb=%d,dictSize=%d,origSize=%d\n",
-+ state.Properties.lc,state.Properties.lp,state.Properties.pb,state.Properties.DictionarySize, uncompressedSize);
-+ outputbuffer = kmalloc(kBlockSize, GFP_KERNEL);
-+ if (outputbuffer == 0) {
-+ printk(KERN_ERR "initramfs: Couldn't allocate lzma output buffer\n");
-+ return -1;
-+ }
-+
-+ state.Probs = (CProb*) kmalloc( LzmaGetNumProbs(&state.Properties)*sizeof(CProb), GFP_KERNEL);
-+ if ( state.Probs == 0) {
-+ printk(KERN_ERR "initramfs: Couldn't allocate lzma workspace\n");
-+ return -1;
-+ }
-+
-+#ifdef CONFIG_LZMA_INITRAM_FS_KMALLOC_ONLY
-+ state.Dictionary = kmalloc( state.Properties.DictionarySize, GFP_KERNEL);
-+#else
-+ state.Dictionary = vmalloc( state.Properties.DictionarySize);
-+#endif
-+ if ( state.Dictionary == 0) {
-+ printk(KERN_ERR "initramfs: Couldn't allocate lzma dictionary\n");
-+ return -1;
-+ }
-+
-+ printk( KERN_NOTICE "LZMA initramfs by Ming-Ching Tiew <mctiew@yahoo.com> " );
-+
-+ LzmaDecoderInit( &state );
-+
-+ for( nowPos =0; nowPos < uncompressedSize ; )
-+ {
-+ UInt32 blockSize = uncompressedSize - nowPos;
-+ if( blockSize > kBlockSize)
-+ blockSize = kBlockSize;
-+ res = LzmaDecode( &state, &callback, outputbuffer, blockSize, &outsizeProcessed);
-+ if( res != 0 ) {
-+ panic( KERN_ERR "initramfs: Lzma decode failure\n");
-+ return -1;
-+ }
-+ if( outsizeProcessed == 0 )
-+ {
-+ uncompressedSize = nowPos;
-+ printk( KERN_NOTICE "initramfs: nowPos=%d, uncompressedSize=%d\n",
-+ nowPos, uncompressedSize );
-+ break;
-+ }
-+ flush_buffer(outputbuffer, outsizeProcessed);
-+ nowPos += outsizeProcessed;
-+ printk( ".");
-+ }
-+
-+#ifdef CONFIG_LZMA_INITRAM_FS_KMALLOC_ONLY
-+ kfree(state.Dictionary);
-+#else
-+ vfree(state.Dictionary);
-+#endif
-+ kfree(outputbuffer);
-+ kfree(state.Probs);
-+ return 0;
-+}
-+
-+#endif /*CONFIG LZMA_INITRAM_FS*/
-+
- static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
- {
- int written;
-@@ -475,12 +588,31 @@ static char * __init unpack_to_rootfs(ch
- inptr = 0;
- outcnt = 0; /* bytes in output buffer */
- bytes_out = 0;
-- crc = (ulg)0xffffffffL; /* shift register contents */
-- makecrc();
-- gunzip();
-- if (state != Reset)
-+ if( inbuf[0] == 037 && ((inbuf[1] == 0213) || (inbuf[1] == 0236)))
-+ {
-+ printk( KERN_NOTICE "detected gzip initramfs\n");
-+ crc = (ulg)0xffffffffL; /* shift register contents */
-+ makecrc();
-+ gunzip();
-+ if (state != Reset)
- error("junk in gzipped archive");
-- this_header = saved_offset + inptr;
-+ }
-+#ifdef CONFIG_LZMA_INITRAM_FS
-+ else if( inbuf[0] < 9 * 5 * 5 && buf[9] == 0 && buf[10] == 0
-+ && buf[11] == 0 && buf[12] == 0 )
-+ {
-+ printk( KERN_NOTICE "detected lzma initramfs\n");
-+ lzma_unzip();
-+ }
-+#endif
-+ else
-+ {
-+ // skip forward ?
-+ crc = (ulg)0xffffffffL; /* shift register contents */
-+ makecrc();
-+ gunzip();
-+ }
-+ this_header = saved_offset + inptr;
- buf += inptr;
- len -= inptr;
- }
-diff -rduNp linux-2.6.22.1.oorig/kernel/Makefile linux-2.6.22.1/kernel/Makefile
---- linux-2.6.22.1.oorig/kernel/Makefile 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/kernel/Makefile 2007-07-24 14:17:46.000000000 +0200
-@@ -66,7 +66,7 @@ $(obj)/configs.o: $(obj)/config_data.h
- # config_data.h contains the same information as ikconfig.h but gzipped.
- # Info from config_data can be extracted from /proc/config*
- targets += config_data.gz
--$(obj)/config_data.gz: .config FORCE
-+$(obj)/config_data.gz: .miniconfig FORCE
- $(call if_changed,gzip)
-
- quiet_cmd_ikconfiggz = IKCFG $@
-diff -rduNp linux-2.6.22.1.oorig/kernel/configs.c linux-2.6.22.1/kernel/configs.c
---- linux-2.6.22.1.oorig/kernel/configs.c 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/kernel/configs.c 2007-07-24 14:17:46.000000000 +0200
-@@ -79,7 +79,7 @@ static int __init ikconfig_init(void)
- struct proc_dir_entry *entry;
-
- /* create the current config file */
-- entry = create_proc_entry("config.gz", S_IFREG | S_IRUGO,
-+ entry = create_proc_entry("miniconfig.gz", S_IFREG | S_IRUGO,
- &proc_root);
- if (!entry)
- return -ENOMEM;
-@@ -95,7 +95,7 @@ static int __init ikconfig_init(void)
-
- static void __exit ikconfig_cleanup(void)
- {
-- remove_proc_entry("config.gz", &proc_root);
-+ remove_proc_entry("miniconfig.gz", &proc_root);
- }
-
- module_init(ikconfig_init);
-diff -rduNp linux-2.6.22.1.oorig/kernel/time/clocksource.c linux-2.6.22.1/kernel/time/clocksource.c
---- linux-2.6.22.1.oorig/kernel/time/clocksource.c 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/kernel/time/clocksource.c 2007-07-24 14:17:46.000000000 +0200
-@@ -87,8 +87,8 @@ static void clocksource_ratewd(struct cl
- if (delta > -WATCHDOG_THRESHOLD && delta < WATCHDOG_THRESHOLD)
- return;
-
-- printk(KERN_WARNING "Clocksource %s unstable (delta = %Ld ns)\n",
-- cs->name, delta);
-+/* printk(KERN_WARNING "Clocksource %s unstable (delta = %Ld ns)\n",
-+ cs->name, delta); */
- cs->flags &= ~(CLOCK_SOURCE_VALID_FOR_HRES | CLOCK_SOURCE_WATCHDOG);
- clocksource_change_rating(cs, 0);
- cs->flags &= ~CLOCK_SOURCE_WATCHDOG;
-diff -rduNp linux-2.6.22.1.oorig/miniconfig.sh linux-2.6.22.1/miniconfig.sh
---- linux-2.6.22.1.oorig/miniconfig.sh 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/miniconfig.sh 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,2 @@
-+#!/bin/sh -f
-+make allnoconfig KCONFIG_ALLCONFIG=.miniconfig
-diff -rduNp linux-2.6.22.1.oorig/scripts/Makefile.lib linux-2.6.22.1/scripts/Makefile.lib
---- linux-2.6.22.1.oorig/scripts/Makefile.lib 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/scripts/Makefile.lib 2007-07-24 14:17:46.000000000 +0200
-@@ -162,4 +162,9 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS)
- quiet_cmd_gzip = GZIP $@
- cmd_gzip = gzip -f -9 < $< > $@
-
-+# LZMA
-+#
-+quiet_cmd_lzma = LZMA $@
-+cmd_lzma = lzma e $< $@ -lc7 -lp0 -pb0 2>/dev/null
-+
-
-diff -rduNp linux-2.6.22.1.oorig/scripts/gen_lzma_initramfs_list.sh linux-2.6.22.1/scripts/gen_lzma_initramfs_list.sh
---- linux-2.6.22.1.oorig/scripts/gen_lzma_initramfs_list.sh 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/scripts/gen_lzma_initramfs_list.sh 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,292 @@
-+#!/bin/bash
-+# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
-+# Copyright (c) 2006 Sam Ravnborg <sam@ravnborg.org>
-+#
-+# Released under the terms of the GNU GPL
-+#
-+# Generate a cpio packed initramfs. It uses gen_init_cpio to generate
-+# the cpio archive, and gzip to pack it.
-+# The script may also be used to generate the inputfile used for gen_init_cpio
-+# This script assumes that gen_init_cpio is located in usr/ directory
-+
-+# error out on errors
-+set -e
-+
-+usage() {
-+cat << EOF
-+Usage:
-+$0 [-o <file>] [-u <uid>] [-g <gid>] { -s | -d | <cpio_source>} ...
-+ -o <file> Create lzma initramfs file named <file> using
-+ gen_init_cpio and lzma
-+ -u <uid> User ID to map to user ID 0 (root).
-+ <uid> is only meaningful if <cpio_source>
-+ is a directory.
-+ -g <gid> Group ID to map to group ID 0 (root).
-+ <gid> is only meaningful if <cpio_source>
-+ is a directory.
-+ <cpio_source> File list or directory for cpio archive.
-+ If <cpio_source> is a .cpio file it will be used
-+ as direct input to initramfs.
-+ -s Create lzma file with small dictionary size
-+ -d Output the default cpio list.
-+
-+All options except -o and -l may be repeated and are interpreted
-+sequentially and immediately. -u and -g states are preserved across
-+<cpio_source> options so an explicit "-u 0 -g 0" is required
-+to reset the root/group mapping.
-+EOF
-+}
-+
-+list_default_initramfs() {
-+ # echo usr/kinit/kinit
-+ :
-+}
-+
-+default_initramfs() {
-+ cat <<-EOF >> ${output}
-+ # This is a very simple, default initramfs
-+
-+ dir /dev 0755 0 0
-+ nod /dev/console 0600 0 0 c 5 1
-+ dir /root 0700 0 0
-+ # file /kinit usr/kinit/kinit 0755 0 0
-+ # slink /init kinit 0755 0 0
-+ EOF
-+}
-+
-+filetype() {
-+ local argv1="$1"
-+
-+ # symlink test must come before file test
-+ if [ -L "${argv1}" ]; then
-+ echo "slink"
-+ elif [ -f "${argv1}" ]; then
-+ echo "file"
-+ elif [ -d "${argv1}" ]; then
-+ echo "dir"
-+ elif [ -b "${argv1}" -o -c "${argv1}" ]; then
-+ echo "nod"
-+ elif [ -p "${argv1}" ]; then
-+ echo "pipe"
-+ elif [ -S "${argv1}" ]; then
-+ echo "sock"
-+ else
-+ echo "invalid"
-+ fi
-+ return 0
-+}
-+
-+list_print_mtime() {
-+ :
-+}
-+
-+print_mtime() {
-+ local my_mtime="0"
-+
-+ if [ -e "$1" ]; then
-+ my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
-+ fi
-+
-+ echo "# Last modified: ${my_mtime}" >> ${output}
-+ echo "" >> ${output}
-+}
-+
-+list_parse() {
-+ echo "$1 \\"
-+}
-+
-+# for each file print a line in following format
-+# <filetype> <name> <path to file> <octal mode> <uid> <gid>
-+# for links, devices etc the format differs. See gen_init_cpio for details
-+parse() {
-+ local location="$1"
-+ local name="${location/${srcdir}//}"
-+ # change '//' into '/'
-+ name="${name//\/\///}"
-+ local mode="$2"
-+ local uid="$3"
-+ local gid="$4"
-+ local ftype=$(filetype "${location}")
-+ # remap uid/gid to 0 if necessary
-+ [ "$uid" -eq "$root_uid" ] && uid=0
-+ [ "$gid" -eq "$root_gid" ] && gid=0
-+ local str="${mode} ${uid} ${gid}"
-+
-+ [ "${ftype}" == "invalid" ] && return 0
-+ [ "${location}" == "${srcdir}" ] && return 0
-+
-+ case "${ftype}" in
-+ "file")
-+ str="${ftype} ${name} ${location} ${str}"
-+ ;;
-+ "nod")
-+ local dev_type=
-+ local maj=$(LC_ALL=C ls -l "${location}" | \
-+ gawk '{sub(/,/, "", $5); print $5}')
-+ local min=$(LC_ALL=C ls -l "${location}" | \
-+ gawk '{print $6}')
-+
-+ if [ -b "${location}" ]; then
-+ dev_type="b"
-+ else
-+ dev_type="c"
-+ fi
-+ str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}"
-+ ;;
-+ "slink")
-+ local target=$(LC_ALL=C ls -l "${location}" | \
-+ gawk '{print $11}')
-+ str="${ftype} ${name} ${target} ${str}"
-+ ;;
-+ *)
-+ str="${ftype} ${name} ${str}"
-+ ;;
-+ esac
-+
-+ echo "${str}" >> ${output}
-+
-+ return 0
-+}
-+
-+unknown_option() {
-+ printf "ERROR: unknown option \"$arg\"\n" >&2
-+ printf "If the filename validly begins with '-', " >&2
-+ printf "then it must be prefixed\n" >&2
-+ printf "by './' so that it won't be interpreted as an option." >&2
-+ printf "\n" >&2
-+ usage >&2
-+ exit 1
-+}
-+
-+list_header() {
-+ :
-+}
-+
-+header() {
-+ printf "\n#####################\n# $1\n" >> ${output}
-+}
-+
-+# process one directory (incl sub-directories)
-+dir_filelist() {
-+ ${dep_list}header "$1"
-+
-+ srcdir=$(echo "$1" | sed -e 's://*:/:g')
-+ dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" 2>/dev/null)
-+
-+ # If $dirlist is only one line, then the directory is empty
-+ if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
-+ ${dep_list}print_mtime "$1"
-+
-+ echo "${dirlist}" | \
-+ while read x; do
-+ ${dep_list}parse ${x}
-+ done
-+ fi
-+}
-+
-+# if only one file is specified and it is .cpio file then use it direct as fs
-+# if a directory is specified then add all files in given direcotry to fs
-+# if a regular file is specified assume it is in gen_initramfs format
-+input_file() {
-+ source="$1"
-+ if [ -f "$1" ]; then
-+ ${dep_list}header "$1"
-+ is_cpio="$(echo "$1" | sed 's/^.*\.cpio/cpio/')"
-+ if [ $2 -eq 0 -a ${is_cpio} == "cpio" ]; then
-+ cpio_file=$1
-+ [ ! -z ${dep_list} ] && echo "$1"
-+ return 0
-+ fi
-+ if [ -z ${dep_list} ]; then
-+ print_mtime "$1" >> ${output}
-+ cat "$1" >> ${output}
-+ else
-+ cat "$1" | while read type dir file perm ; do
-+ if [ "$type" == "file" ]; then
-+ echo "$file \\";
-+ fi
-+ done
-+ fi
-+ elif [ -d "$1" ]; then
-+ dir_filelist "$1"
-+ else
-+ echo " ${prog}: Cannot open '$1'" >&2
-+ exit 1
-+ fi
-+}
-+
-+prog=$0
-+root_uid=0
-+root_gid=0
-+dep_list=
-+cpio_file=
-+cpio_list=
-+output="/dev/stdout"
-+output_file=""
-+opt=""
-+
-+arg="$1"
-+case "$arg" in
-+ "-l") # files included in initramfs - used by kbuild
-+ dep_list="list_"
-+ echo "deps_initramfs := \\"
-+ shift
-+ ;;
-+ "-o") # generate lzma-ed cpio image named $1
-+ shift
-+ output_file="$1"
-+ cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
-+ output=${cpio_list}
-+ shift
-+ ;;
-+esac
-+while [ $# -gt 0 ]; do
-+ arg="$1"
-+ shift
-+ case "$arg" in
-+ "-u") # map $1 to uid=0 (root)
-+ root_uid="$1"
-+ shift
-+ ;;
-+ "-g") # map $1 to gid=0 (root)
-+ root_gid="$1"
-+ shift
-+ ;;
-+ "-s")
-+ opt="-d16"
-+ ;;
-+ "-d") # display default initramfs list
-+ default_list="$arg"
-+ ${dep_list}default_initramfs
-+ ;;
-+ "-h")
-+ usage
-+ exit 0
-+ ;;
-+ *)
-+ case "$arg" in
-+ "-"*)
-+ unknown_option
-+ ;;
-+ *) # input file/dir - process it
-+ input_file "$arg" "$#"
-+ ;;
-+ esac
-+ ;;
-+ esac
-+done
-+
-+# If output_file is set we will generate cpio archive and lzma it
-+# we are carefull to delete tmp files
-+if [ ! -z ${output_file} ]; then
-+ if [ -z ${cpio_file} ]; then
-+ cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
-+ usr/gen_init_cpio ${cpio_list} > ${cpio_tfile}
-+ else
-+ cpio_tfile=${cpio_file}
-+ fi
-+ rm ${cpio_list}
-+ lzma e ${cpio_tfile} ${output_file} ${opt}
-+ [ -z ${cpio_file} ] && rm ${cpio_tfile}
-+fi
-+exit 0
-diff -rduNp linux-2.6.22.1.oorig/shrinkconfig.sh linux-2.6.22.1/shrinkconfig.sh
---- linux-2.6.22.1.oorig/shrinkconfig.sh 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.22.1/shrinkconfig.sh 2007-07-24 14:17:46.000000000 +0200
-@@ -0,0 +1,79 @@
-+#! /bin/bash
-+
-+# shrinkconfig copyright 2006 by Rob Landley <rob@landley.net>
-+# Licensed under the GNU General Public License version 2.
-+
-+if [ $# -ne 1 ]
-+then
-+ echo "Turns current .config into a miniconfig file."
-+ echo "Usage: shrinkconfig mini.config"
-+ exit 1
-+fi
-+
-+if [ ! -f .config ]
-+then
-+ echo "Need a .config file to shrink."
-+ exit 1
-+fi
-+LENGTH=$(wc -l < .config)
-+
-+OUTPUT="$1"
-+cp .config "$OUTPUT"
-+if [ $? -ne 0 ]
-+then
-+ echo "Couldn't create $OUTPUT"
-+ exit 1
-+fi
-+
-+# If we get interrupted, clean up the mess
-+
-+KERNELOUTPUT=""
-+
-+function cleanup
-+{
-+ echo
-+ echo "Interrupted."
-+ [ ! -z "$KERNELOUTPUT" ] && rm -rf "$KERNELOUTPUT"
-+ rm "$OUTPUT"
-+ exit 1
-+}
-+
-+trap cleanup HUP INT QUIT TERM
-+
-+# Since the "O=" argument to make doesn't work recursively, we need to jump
-+# through a few hoops to avoid overwriting the .config that we're shrinking.
-+
-+# If we're building out of tree, we'll have absolute paths to source and build
-+# directories in the Makefile.
-+
-+KERNELSRC=$(sed -n -e 's/KERNELSRC[^/]*:=[^/]*//p' Makefile)
-+[ -z "$KERNELSRC" ] && KERNELSRC=$(pwd)
-+KERNELOUTPUT=`pwd`/.config.minitemp
-+
-+mkdir -p "$KERNELOUTPUT" || exit 1
-+
-+echo "Shrinking .config to $OUTPUT..."
-+
-+for I in $(seq 1 $LENGTH)
-+do
-+ echo -n -e "\r"$I/$LENGTH lines $(wc -c < "$OUTPUT") bytes
-+
-+ sed -n "${I}!p" "$OUTPUT" > "$KERNELOUTPUT"/.config.test
-+ # Do a config with this file
-+ make -C "$KERNELSRC" O="$KERNELOUTPUT" allnoconfig KCONFIG_ALLCONFIG="$KERNELOUTPUT"/.config.test > /dev/null
-+
-+ # Compare. The date changes, so expect a small difference each time.
-+ D=$(diff "$KERNELOUTPUT"/.config .config | wc -l)
-+ if [ $D -eq 4 ]
-+ then
-+ mv "$KERNELOUTPUT"/.config.test "$OUTPUT"
-+ LENGTH=$[$LENGTH-1]
-+ else
-+ I=$[$I + 1]
-+ fi
-+done
-+
-+rm -rf "$KERNELOUTPUT"
-+
-+# One extra echo to preserve status line.
-+echo
-diff -rduNp linux-2.6.22.1.oorig/usr/Makefile linux-2.6.22.1/usr/Makefile
---- linux-2.6.22.1.oorig/usr/Makefile 2007-07-10 20:56:30.000000000 +0200
-+++ linux-2.6.22.1/usr/Makefile 2007-07-24 14:17:46.000000000 +0200
-@@ -19,6 +19,7 @@ $(obj)/initramfs_data.o: $(obj)/initramf
-
- hostprogs-y := gen_init_cpio
- initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
-+lzma_initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_lzma_initramfs_list.sh
- ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
- $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
- ramfs-args := \
-@@ -36,6 +37,14 @@ endif
- quiet_cmd_initfs = GEN $@
- cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
-
-+ifdef CONFIG_LZMA_INITRAM_FS_SMALLMEM
-+quiet_cmd_lzma_initfs = LZRAMFS $@
-+ cmd_lzma_initfs = $(lzma_initramfs) -o $@ $(ramfs-args) -s $(ramfs-input)
-+else
-+quiet_cmd_lzma_initfs = LZRAMFS $@
-+ cmd_lzma_initfs = $(lzma_initramfs) -o $@ $(ramfs-args) $(ramfs-input)
-+endif
-+
- targets := initramfs_data.cpio.gz
- # do not try to update files included in initramfs
- $(deps_initramfs): ;
-@@ -48,5 +57,9 @@ $(deps_initramfs): klibcdirs
- # 4) arguments to gen_initramfs.sh changes
- $(obj)/initramfs_data.cpio.gz: $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
- $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.gz.d
-+ifdef CONFIG_LZMA_INITRAM_FS
-+ $(call if_changed,lzma_initfs)
-+else
- $(call if_changed,initfs)
-+endif
-
+++ /dev/null
-diff -rdup linux-2.6.21.5.oorig/arch/i386/boot/compressed/Makefile linux-2.6.21.5/arch/i386/boot/compressed/Makefile
---- linux-2.6.21.5.oorig/arch/i386/boot/compressed/Makefile 2007-07-24 13:08:51.000000000 +0200
-+++ linux-2.6.21.5/arch/i386/boot/compressed/Makefile 2007-07-24 14:54:38.000000000 +0200
-@@ -4,7 +4,7 @@
- # create a compressed vmlinux image from the original vmlinux
- #
-
--tragets := head.o lzma_misc.o piggy.o \
-+targets := head.o lzma_misc.o piggy.o \
- vmlinux.bin.all vmlinux.relocs \
- vmlinux vmlinux.bin vmlinux.bin.gz
- EXTRA_AFLAGS := -traditional
-diff -rdup linux-2.6.21.5.oorig/scripts/gen_lzma_initramfs_list.sh linux-2.6.21.5/scripts/gen_lzma_initramfs_list.sh
---- linux-2.6.21.5.oorig/scripts/gen_lzma_initramfs_list.sh 2007-07-24 13:08:51.000000000 +0200
-+++ linux-2.6.21.5/scripts/gen_lzma_initramfs_list.sh 2007-07-24 15:12:10.000000000 +0200
-@@ -253,7 +253,7 @@ while [ $# -gt 0 ]; do
- shift
- ;;
- "-s")
-- opt="-d16"
-+ #opt="-d16" ? what was that supposed to do?
- ;;
- "-d") # display default initramfs list
- default_list="$arg"
-@@ -286,7 +286,7 @@ if [ ! -z ${output_file} ]; then
- cpio_tfile=${cpio_file}
- fi
- rm ${cpio_list}
-- lzma e ${cpio_tfile} ${output_file} ${opt}
-+ lzma -z ${cpio_tfile} ${opt} -c > ${output_file}
- [ -z ${cpio_file} ] && rm ${cpio_tfile}
- fi
- exit 0
---- linux-2.6.21.5.oorig/arch/i386/boot/compressed/lzma_misc.c 2007-07-24 15:24:44.000000000 +0200
-+++ linux-2.6.21.5/arch/i386/boot/compressed/lzma_misc.c 2007-07-24 17:09:40.000000000 +0200
-@@ -241,7 +241,6 @@ static int lzma_unzip(uch* output)
-
- static int read_byte(void *object, const unsigned char **buffer, SizeT *bufferSize)
- {
-- static unsigned int i = 0;
- static unsigned char val;
- *bufferSize = 1;
- val = get_byte();
---- linux-2.6.21.5.oorig/scripts/Makefile.lib 2007-07-24 15:24:44.000000000 +0200
-+++ linux-2.6.21.5/scripts/Makefile.lib 2007-07-24 18:03:57.000000000 +0200
-@@ -165,6 +165,7 @@ cmd_gzip = gzip -f -9 < $< > $@
- # LZMA
- #
- quiet_cmd_lzma = LZMA $@
--cmd_lzma = lzma e $< $@ -lc7 -lp0 -pb0 2>/dev/null
-+#cmd_lzma = lzma e $< $@ -lc7 -lp0 -pb0 2>/dev/null
-+cmd_lzma = lzma -z $< -c > $@
-
-
+++ /dev/null
-diff -rdup linux-2.6.22.1.old/scripts/Makefile.lib linux-2.6.22.1/scripts/Makefile.lib
---- linux-2.6.22.1.old/scripts/Makefile.lib 2007-08-21 16:32:19.000000000 +0200
-+++ linux-2.6.22.1/scripts/Makefile.lib 2007-08-21 16:43:20.000000000 +0200
-@@ -166,6 +166,6 @@ cmd_gzip = gzip -f -9 < $< > $@
- #
- quiet_cmd_lzma = LZMA $@
- #cmd_lzma = lzma e $< $@ -lc7 -lp0 -pb0 2>/dev/null
--cmd_lzma = lzma -z $< -c > $@
-+cmd_lzma = $(LZMA) -z $< -c > $@
-
-
-diff -rdup linux-2.6.22.1.old/scripts/gen_lzma_initramfs_list.sh linux-2.6.22.1/scripts/gen_lzma_initramfs_list.sh
---- linux-2.6.22.1.old/scripts/gen_lzma_initramfs_list.sh 2007-08-21 16:32:19.000000000 +0200
-+++ linux-2.6.22.1/scripts/gen_lzma_initramfs_list.sh 2007-08-21 16:42:56.000000000 +0200
-@@ -11,7 +11,7 @@
-
- # error out on errors
- set -e
--
-+test "x$LZMA" = "x" && LZMA=lzma
- usage() {
- cat << EOF
- Usage:
-@@ -286,7 +286,7 @@ if [ ! -z ${output_file} ]; then
- cpio_tfile=${cpio_file}
- fi
- rm ${cpio_list}
-- lzma -z ${cpio_tfile} ${opt} -c > ${output_file}
-+ $LZMA -z ${cpio_tfile} ${opt} -c > ${output_file}
- [ -z ${cpio_file} ] && rm ${cpio_tfile}
- fi
- exit 0
-diff -rdup linux-2.6.22.1.old/usr/Makefile linux-2.6.22.1/usr/Makefile
---- linux-2.6.22.1.old/usr/Makefile 2007-08-21 16:32:19.000000000 +0200
-+++ linux-2.6.22.1/usr/Makefile 2007-08-21 16:46:22.000000000 +0200
-@@ -19,7 +19,7 @@ $(obj)/initramfs_data.o: $(obj)/initramf
-
- hostprogs-y := gen_init_cpio
- initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
--lzma_initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_lzma_initramfs_list.sh
-+lzma_initramfs := LZMA=$(LZMA) $(CONFIG_SHELL) $(srctree)/scripts/gen_lzma_initramfs_list.sh
- ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
- $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
- ramfs-args := \
projects / buildroot.git / commitdiff