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/ext3/namei.c b/fs/ext3/namei.c
index 552f94d7cf3d..f89b1d4c2fb5 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -2298,6 +2298,9 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
         struct ext3_dir_entry_2 * old_de, * new_de;
         int retval, flush_file = 0;
 
+        if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode))
+                dentry_unhash(new_dentry);
+
         dquot_initialize(old_dir);
         dquot_initialize(new_dir);