fsck.f2fs: reconnect unreachable files to lost+found
This patch introduces lost_found feature to fsck. If a file is found
unreachable by fsck. Fsck tries to reconnect the file to lost+found
directory:
1. Scan all unreachable file inodes, ignore non-inodes ones and
directories.
2. Check them and fix incorrupted data to make sure filesystem
metadata (mainly counters and main/nat bitmap) are all consistent.
3. Reconnect these files to lost+found. If lost+found does not exist,
create it first. During reconnecting, expand lost+found's dentry
block automatically. Reconnected files are renamed after its ino
number.
4. If reconnect fails drop the node and restore filesystem metadata.
Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
4 files changed
