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/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index c88612f0c1eb..227b409b8406 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -573,6 +573,9 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         struct dentry *lower_new_dir_dentry;
         struct dentry *trap = NULL;
 
+        if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode))
+                dentry_unhash(new_dentry);
+
         lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
         lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
         dget(lower_old_dentry);