SUNRPC: Clean up the sillyrename code

Fix a couple of bugs:
 - Don't rely on the parent dentry still being valid when the call completes.
   Fixes a race with shrink_dcache_for_umount_subtree()

 - Don't remove the file if the filehandle has been labelled as stale.

Fix a couple of inefficiencies
 - Remove the global list of sillyrenamed files. Instead we can cache the
   sillyrename information in the dentry->d_fsdata
 - Move common code from unlink_setup/unlink_done into fs/nfs/unlink.c

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 7babcb16300b..cf74a4db84a5 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -791,9 +791,8 @@ struct nfs_rpc_ops {
         int     (*create)  (struct inode *, struct dentry *,
                             struct iattr *, int, struct nameidata *);
         int     (*remove)  (struct inode *, struct qstr *);
-        int     (*unlink_setup)  (struct rpc_message *,
-                            struct dentry *, struct qstr *);
-        int     (*unlink_done) (struct dentry *, struct rpc_task *);
+        void    (*unlink_setup)  (struct rpc_message *, struct inode *dir);
+        int     (*unlink_done) (struct rpc_task *, struct inode *);
         int     (*rename)  (struct inode *, struct qstr *,
                             struct inode *, struct qstr *);
         int     (*link)    (struct inode *, struct inode *, struct qstr *);