[f2fs-dev] [PATCH] fsck.f2fs: fix to avoid assert in do_record_fsync_data()

[Chao Yu <chao@kernel.org>]

As Kane Ch'in reported in bugzilla [1]

I am using some Debian VMs with f2fs root partition for development.
My host machine crashed for some reason and this caused the f2fs
partitions in the VMs to become corrupted. I tried to boot from Debian
Live and repair the partitions but failed.

do_record_fsync_data: [node] ino = 24573, nid = 0, blkaddr = 2063580
recover_data: ino = 24573, nid = 0, recorded = 0, err = 0
do_record_fsync_data: [node] ino = 471286, nid = 0, blkaddr = 2063581
recover_data: ino = 471286, nid = 0, recorded = 0, err = 0
[ASSERT] (do_record_fsync_data:3475) 0

During do_record_fsync_data(), if dnode in warm node chain is valid in
SIT table, it's better to continue checking rather than triggering
assert().

[1] https://bugzilla.kernel.org/show_bug.cgi?id=218349

Reported-by: Kane Ch'in <qinfd2023@lzu.edu.cn>
Signed-off-by: Chao Yu <chao@kernel.org>
---
 fsck/mount.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/fsck/mount.c b/fsck/mount.c
index 30c6228..345556d 100644
--- a/fsck/mount.c
+++ b/fsck/mount.c
@@ -3811,14 +3811,11 @@ static int do_record_fsync_data(struct f2fs_sb_info *sbi,
 	se = get_seg_entry(sbi, segno);
 	offset = OFFSET_IN_SEG(sbi, blkaddr);
 
-	if (f2fs_test_bit(offset, (char *)se->cur_valid_map)) {
-		ASSERT(0);
-		return -1;
-	}
-	if (f2fs_test_bit(offset, (char *)se->ckpt_valid_map)) {
-		ASSERT(0);
-		return -1;
-	}
+	if (f2fs_test_bit(offset, (char *)se->cur_valid_map))
+		return 1;
+
+	if (f2fs_test_bit(offset, (char *)se->ckpt_valid_map))
+		return 1;
 
 	if (!se->ckpt_valid_blocks)
 		se->ckpt_type = CURSEG_WARM_NODE;
@@ -3912,8 +3909,11 @@ static int traverse_dnodes(struct f2fs_sb_info *sbi,
 			goto next;
 
 		err = do_record_fsync_data(sbi, node_blk, blkaddr);
-		if (err)
+		if (err) {
+			if (err > 0)
+				err = 0;
 			break;
+		}
 
 		if (entry->blkaddr == blkaddr)
 			del_fsync_inode(entry);
-- 
2.40.1



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