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/afs/dir.c b/fs/afs/dir.c
index 9a7f41421534..2c4e05160042 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -1148,6 +1148,9 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
         struct key *key;
         int ret;
 
+        if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode))
+                dentry_unhash(new_dentry);
+
         vnode = AFS_FS_I(old_dentry->d_inode);
         orig_dvnode = AFS_FS_I(old_dir);
         new_dvnode = AFS_FS_I(new_dir);