NFS: Create a return_delegation rpc op

Delegations are a v4 feature, so push return_delegation out of the
generic client by creating a new rpc_op and renaming the old function to
be in the nfs v4 "namespace"

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

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 08f832634ef9..4749a32e54be 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -882,6 +882,12 @@ static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
         return 0;
 }
 
+static int nfs3_return_delegation(struct inode *inode)
+{
+        nfs_wb_all(inode);
+        return 0;
+}
+
 const struct nfs_rpc_ops nfs_v3_clientops = {
         .version        = 3,                    /* protocol version */
         .dentry_ops     = &nfs_dentry_operations,
@@ -927,5 +933,6 @@ const struct nfs_rpc_ops nfs_v3_clientops = {
         .clear_acl_cache = nfs3_forget_cached_acls,
         .close_context  = nfs_close_context,
         .have_delegation = nfs3_have_delegation,
+        .return_delegation = nfs3_return_delegation,
         .init_client    = nfs_init_client,
 };