vfs: push dentry_unhash on rename_dir into file systems

Only a few file systems need this.  Start by pushing it down into each
rename method (except gfs2 and xfs) so that it can be dealt with on a
per-fs basis.

Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
index 2b32734cd31a..f34c9cde9e94 100644
--- a/fs/logfs/dir.c
+++ b/fs/logfs/dir.c
@@ -624,6 +624,9 @@ static int logfs_rename_cross(struct inode *old_dir, struct dentry *old_dentry,
         loff_t pos;
         int err;
 
+        if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode))
+                dentry_unhash(new_dentry);
+
         /* 1. locate source dd */
         err = logfs_get_dd(old_dir, old_dentry, &dd, &pos);
         if (err)