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f2fs: allow to recover node blocks given updated checkpoint 

If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
forward recovery. Let's relax the condition to recover them.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2018-01-19 13:42:33 -08:00
parent 37a086f015
commit f236792311
3 changed files with 6 additions and 0 deletions
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1
fs/f2fs/checkpoint.c
View File

@ -1157,6 +1157,7 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
/* set this flag to activate crc|cp_ver for recovery */
__set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
__clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
spin_unlock_irqrestore(&sbi->cp_lock, flags);
}

4
fs/f2fs/node.h
View File

@ -305,6 +305,10 @@ static inline bool is_recoverable_dnode(struct page *page)
struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
__u64 cp_ver = cur_cp_version(ckpt);
/* Don't care crc part, if fsck.f2fs sets it. */
if (__is_set_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG))
return (cp_ver << 32) == (cpver_of_node(page) << 32);
if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
cp_ver |= (cur_cp_crc(ckpt) << 32);

1
include/linux/f2fs_fs.h
View File

@ -117,6 +117,7 @@ struct f2fs_super_block {
/*
* For checkpoint
*/
#define CP_NOCRC_RECOVERY_FLAG 0x00000200
#define CP_TRIMMED_FLAG 0x00000100
#define CP_NAT_BITS_FLAG 0x00000080
#define CP_CRC_RECOVERY_FLAG 0x00000040