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.
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
Change log from v1:
- add a new checkpoint flag to handle this
fs/f2fs/checkpoint.c | 1 +
fs/f2fs/node.h | 4 ++++
include/linux/f2fs_fs.h | 1 +
3 files changed, 6 insertions(+)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 9c7596f7daae..512dca8abc7d 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -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);
}
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 0ee3e5ff49a3..081ef0d672bf 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -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);
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index cfb522e6affc..6eed677b6d9a 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -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
--
2.15.0.531.g2ccb3012c9-goog
