[PATCH 5/5] f2fs: enforce fsync_mode=strict for renamed directory

[Jaegeuk Kim]

This is to give a option for user to be able to recover B/foo in the below
case.

mkdir A
sync()
rename(A, B)
creat (B/foo)
fsync (B/foo)
---crash---

Sugessted-by: Velayudhan Pillai <vi...@cs.utexas.edu>
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
 fs/f2fs/namei.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index b5f404674cad..fef6e3ab2135 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -973,8 +973,11 @@ static int f2fs_rename(struct inode *old_dir, struct 
dentry *old_dentry,
                        f2fs_put_page(old_dir_page, 0);
                f2fs_i_links_write(old_dir, false);
        }
-       if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
+       if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
                add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
+               if (S_ISDIR(old_inode->i_mode))
+                       add_ino_entry(sbi, old_inode->i_ino, TRANS_DIR_INO);
+       }
 
        f2fs_unlock_op(sbi);
 
-- 
2.17.0.484.g0c8726318c-goog