linux-kernel - [PATCH Vx 1/1] f2fs: fix some error handling case in gc

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Date:   Thu, 15 Sep 2022 14:16:13 +0800
From:   "zhiguo.niu" <zhiguo.niu@...soc.com>
To:     <jaegeuk@...nel.org>, <chao@...nel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>
CC:     <lvqiang.huang@...soc.com>
Subject: [PATCH Vx 1/1] f2fs: fix some error handling case in gc

During GC, if segment type stored in SSA and SIT is inconsistent,
we set SBI_NEED_FSCK first and then stop checkpoint, this will
cause the following issues:
1. SBI_NEED_FSCK can not be set to flash truly because of checkpoint
has been stopped.
2. Will cause more EIO error because of CP_ERROR_FLAG is set in
f2fs_stop_checkpoint, this is not reasonable.

So we fix this error handling case by recording current victim segment
as invalid for gc.

Signed-off-by: zhiguo.niu <zhiguo.niu@...soc.com>
---
 fs/f2fs/gc.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index d5fb426e0747..66bdf2678b5e 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1700,10 +1700,13 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,

                sum = page_address(sum_page);
                if (type != GET_SUM_TYPE((&sum->footer))) {
-                       f2fs_err(sbi, "Inconsistent segment (%u) type [%d, %d] in SSA and SIT",
-                                segno, type, GET_SUM_TYPE((&sum->footer)));
-                       set_sbi_flag(sbi, SBI_NEED_FSCK);
-                       f2fs_stop_checkpoint(sbi, false);
+#ifdef CONFIG_F2FS_CHECK_FS
+                       if (!test_and_set_bit(segno, SIT_I(sbi)->invalid_segmap)) {
+                               f2fs_err(sbi, "Inconsistent segment (%u) type [%d, %d] in SSA and SIT",
+                                       segno, type, GET_SUM_TYPE((&sum->footer)));
+                               set_sbi_flag(sbi, SBI_NEED_FSCK);
+                       }
+#endif
                        goto skip;
                }

--
2.17.1

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