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f2fs: Add a new CP flag to help fsck fix resize SPO issues 

Add and set a new CP flag CP_RESIZEFS_FLAG during
online resize FS to help fsck fix the metadata mismatch
that may happen due to SPO during resize, where SB
got updated but CP data couldn't be written yet.

fsck errors -
Info: CKPT version = 6ed7bccb
        Wrong user_block_count(2233856)
[f2fs_do_mount:3365] Checkpoint is polluted

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Sahitya Tummala 2020-03-03 19:59:26 +05:30 committed by Jaegeuk Kim
parent 6827568275
commit c84ef3c5e6
2 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/f2fs/checkpoint.c
View File

@ -1298,10 +1298,14 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
else
__clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) ||
is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
__set_ckpt_flags(ckpt, CP_FSCK_FLAG);
if (is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
__set_ckpt_flags(ckpt, CP_RESIZEFS_FLAG);
else
__clear_ckpt_flags(ckpt, CP_RESIZEFS_FLAG);
if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
__set_ckpt_flags(ckpt, CP_DISABLED_FLAG);
else

1
include/linux/f2fs_fs.h
View File

@ -125,6 +125,7 @@ struct f2fs_super_block {
/*
* For checkpoint
*/
#define CP_RESIZEFS_FLAG 0x00004000
#define CP_DISABLED_QUICK_FLAG 0x00002000
#define CP_DISABLED_FLAG 0x00001000
#define CP_QUOTA_NEED_FSCK_FLAG 0x00000800