From 5d8811eb87b0a3b352817a72928586af8aad2892 Mon Sep 17 00:00:00 2001 From: Norbert Lange Date: Fri, 7 Aug 2020 11:20:01 +0200 Subject: [PATCH] package/f2fs-tools: fsck should use correct returncodes fsck.f2fs does not implement the returncodes from the fsck interface. This is particularly bad if systemd is used with a root f2fs partition, as it will interpret the rc as order to reboot. for thread & pending upstream fix see: https://sourceforge.net/p/linux-f2fs/mailman/message/37079401/ Signed-off-by: Norbert Lange Signed-off-by: Yann E. MORIN --- .../0002-fsck.f2fs-correct-return-value.patch | 195 ++++++++++++++++++ 1 file changed, 195 insertions(+) create mode 100644 package/f2fs-tools/0002-fsck.f2fs-correct-return-value.patch diff --git a/package/f2fs-tools/0002-fsck.f2fs-correct-return-value.patch b/package/f2fs-tools/0002-fsck.f2fs-correct-return-value.patch new file mode 100644 index 0000000000..b420e27a0e --- /dev/null +++ b/package/f2fs-tools/0002-fsck.f2fs-correct-return-value.patch @@ -0,0 +1,195 @@ +From eee12fe5e2e6c5f71bc7cbe25a608b730fd5362e Mon Sep 17 00:00:00 2001 +From: Chao Yu +Date: Fri, 7 Aug 2020 10:02:31 +0800 +Subject: [PATCH] fsck.f2fs: correct return value +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +As Norbert Lange reported: + +" +$ fsck.f2fs -a /dev/mmcblk0p5; echo $? +Info: Fix the reported corruption. +Info: Mounted device! +Info: Check FS only on RO mounted device +Error: Failed to open the device! +255 +" + +Michael Laß reminds: + +" +I think the return value is exactly the problem here. See fsck(8) ( +https://linux.die.net/man/8/fsck) which specifies the return values. +Systemd looks at these and decides how to proceed: + +https://github.com/systemd/systemd/blob/a859abf062cef1511e4879c4ee39c6036ebeaec8/src/fsck/fsck.c#L407 + +That means, if fsck.f2fs returns 255, then +the FSCK_SYSTEM_SHOULD_REBOOT bit is set and systemd will reboot. +" + +So the problem here is fsck.f2fs didn't return correct value to userspace +apps, result in later unexpected behavior of rebooting, let's fix this. + +Reported-by: Norbert Lange +Reported-by: Michael Laß +Signed-off-by: Chao Yu +Signed-off-by: Norbert Lange +--- + fsck/fsck.h | 11 +++++++++++ + fsck/main.c | 45 +++++++++++++++++++++++++++++++-------------- + 2 files changed, 42 insertions(+), 14 deletions(-) + +diff --git a/fsck/fsck.h b/fsck/fsck.h +index ccf4a39..c8aeb06 100644 +--- a/fsck/fsck.h ++++ b/fsck/fsck.h +@@ -13,6 +13,17 @@ + + #include "f2fs.h" + ++enum { ++ FSCK_SUCCESS = 0, ++ FSCK_ERROR_CORRECTED = 1 << 0, ++ FSCK_SYSTEM_SHOULD_REBOOT = 1 << 1, ++ FSCK_ERRORS_LEFT_UNCORRECTED = 1 << 2, ++ FSCK_OPERATIONAL_ERROR = 1 << 3, ++ FSCK_USAGE_OR_SYNTAX_ERROR = 1 << 4, ++ FSCK_USER_CANCELLED = 1 << 5, ++ FSCK_SHARED_LIB_ERROR = 1 << 7, ++}; ++ + struct quota_ctx; + + #define FSCK_UNMATCHED_EXTENT 0x00000001 +diff --git a/fsck/main.c b/fsck/main.c +index 8c62a14..b0f2ec3 100644 +--- a/fsck/main.c ++++ b/fsck/main.c +@@ -591,7 +591,7 @@ void f2fs_parse_options(int argc, char *argv[]) + error_out(prog); + } + +-static void do_fsck(struct f2fs_sb_info *sbi) ++static int do_fsck(struct f2fs_sb_info *sbi) + { + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + u32 flag = le32_to_cpu(ckpt->ckpt_flags); +@@ -614,7 +614,7 @@ static void do_fsck(struct f2fs_sb_info *sbi) + } else { + MSG(0, "[FSCK] F2FS metadata [Ok..]"); + fsck_free(sbi); +- return; ++ return FSCK_SUCCESS; + } + + if (!c.ro) +@@ -646,7 +646,7 @@ static void do_fsck(struct f2fs_sb_info *sbi) + ret = quota_init_context(sbi); + if (ret) { + ASSERT_MSG("quota_init_context failure: %d", ret); +- return; ++ return FSCK_OPERATIONAL_ERROR; + } + } + fsck_chk_orphan_node(sbi); +@@ -654,8 +654,14 @@ static void do_fsck(struct f2fs_sb_info *sbi) + F2FS_FT_DIR, TYPE_INODE, &blk_cnt, NULL); + fsck_chk_quota_files(sbi); + +- fsck_verify(sbi); ++ ret = fsck_verify(sbi); + fsck_free(sbi); ++ ++ if (!c.bug_on) ++ return FSCK_SUCCESS; ++ if (!ret) ++ return FSCK_ERROR_CORRECTED; ++ return FSCK_ERRORS_LEFT_UNCORRECTED; + } + + static void do_dump(struct f2fs_sb_info *sbi) +@@ -763,7 +769,7 @@ static int do_sload(struct f2fs_sb_info *sbi) + int main(int argc, char **argv) + { + struct f2fs_sb_info *sbi; +- int ret = 0; ++ int ret = 0, ret2; + clock_t start = clock(); + + f2fs_init_configuration(); +@@ -771,10 +777,15 @@ int main(int argc, char **argv) + f2fs_parse_options(argc, argv); + + if (c.func != DUMP && f2fs_devs_are_umounted() < 0) { +- if (errno == EBUSY) ++ if (errno == EBUSY) { ++ if (c.func == FSCK) ++ return FSCK_OPERATIONAL_ERROR; + return -1; ++ } + if (!c.ro || c.func == DEFRAG) { + MSG(0, "\tError: Not available on mounted device!\n"); ++ if (c.func == FSCK) ++ return FSCK_OPERATIONAL_ERROR; + return -1; + } + +@@ -789,8 +800,11 @@ int main(int argc, char **argv) + } + + /* Get device */ +- if (f2fs_get_device_info() < 0) ++ if (f2fs_get_device_info() < 0) { ++ if (c.func == FSCK) ++ return FSCK_OPERATIONAL_ERROR; + return -1; ++ } + + fsck_again: + memset(&gfsck, 0, sizeof(gfsck)); +@@ -808,7 +822,7 @@ fsck_again: + + switch (c.func) { + case FSCK: +- do_fsck(sbi); ++ ret = do_fsck(sbi); + break; + #ifdef WITH_DUMP + case DUMP: +@@ -856,8 +870,8 @@ fsck_again: + char ans[255] = {0}; + retry: + printf("Do you want to fix this partition? [Y/N] "); +- ret = scanf("%s", ans); +- ASSERT(ret >= 0); ++ ret2 = scanf("%s", ans); ++ ASSERT(ret2 >= 0); + if (!strcasecmp(ans, "y")) + c.fix_on = 1; + else if (!strcasecmp(ans, "n")) +@@ -869,12 +883,15 @@ retry: + goto fsck_again; + } + } +- ret = f2fs_finalize_device(); +- if (ret < 0) +- return ret; ++ ret2 = f2fs_finalize_device(); ++ if (ret2) { ++ if (c.func == FSCK) ++ return FSCK_OPERATIONAL_ERROR; ++ return ret2; ++ } + + printf("\nDone: %lf secs\n", (clock() - start) / (double)CLOCKS_PER_SEC); +- return 0; ++ return ret; + + out_err: + if (sbi->ckpt) +-- +2.27.0 + -- 2.30.2