f2fs: fix to recover inode's crtime during POR

Testcase to reproduce this bug:
1. mkfs.f2fs -O extra_attr -O inode_crtime /dev/sdd
2. mount -t f2fs /dev/sdd /mnt/f2fs
3. touch /mnt/f2fs/file
4. xfs_io -f /mnt/f2fs/file -c "fsync"
5. godown /mnt/f2fs
6. umount /mnt/f2fs
7. mount -t f2fs /dev/sdd /mnt/f2fs
8. xfs_io -f /mnt/f2fs/file -c "statx -r"

stat.btime.tv_sec = 0
stat.btime.tv_nsec = 0

This patch fixes to recover inode creation time fields during
mount.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 645e287770c0db2bcf4e8ce53699e3eeee450de0..245ea6c0fcbb4b0bdae76410d344a425c426ab87 100644 (file)
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2558,6 +2558,13 @@ retry:
                        F2FS_FITS_IN_INODE(src, le16_to_cpu(src->i_extra_isize),
                                                                i_projid))
                        dst->i_projid = src->i_projid;
+
+               if (f2fs_sb_has_inode_crtime(sbi->sb) &&
+                       F2FS_FITS_IN_INODE(src, le16_to_cpu(src->i_extra_isize),
+                                                       i_crtime_nsec)) {
+                       dst->i_crtime = src->i_crtime;
+                       dst->i_crtime_nsec = src->i_crtime_nsec;
+               }
        }
 
        new_ni = old_ni;