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, 4 insertions, 2 deletions

diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 23451a955aa0..b28835091dd0 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -469,10 +469,12 @@ static int hfsplus_rename(struct inode *old_dir, struct dentry *old_dentry,
 
         /* Unlink destination if it already exists */
         if (new_dentry->d_inode) {
-                if (S_ISDIR(new_dentry->d_inode->i_mode))
+                if (S_ISDIR(new_dentry->d_inode->i_mode)) {
+                        dentry_unhash(new_dentry);
                         res = hfsplus_rmdir(new_dir, new_dentry);
-                else
+                } else {
                         res = hfsplus_unlink(new_dir, new_dentry);
+                }
                 if (res)
                         return res;
         }