NFSv4: Fix sillyrename to return the delegation when appropriate

Ensure that we pass down the inode of the file being deleted so
that we can return any delegation being held.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

fs/nfs/nfs3proc.c

@@ -414,7 +414,9 @@ out:
 }
 
 static void
-nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dentry)
+nfs3_proc_unlink_setup(struct rpc_message *msg,
+		struct dentry *dentry,
+		struct inode *inode)
 {
 	msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 }

fs/nfs/nfs4proc.c

@@ -4260,11 +4260,12 @@ static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
 	return err;
 }
 
-static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dentry)
+static void nfs4_proc_unlink_setup(struct rpc_message *msg,
+		struct dentry *dentry,
+		struct inode *inode)
 {
 	struct nfs_removeargs *args = msg->rpc_argp;
 	struct nfs_removeres *res = msg->rpc_resp;
-	struct inode *inode = d_inode(dentry);
 
 	res->server = NFS_SB(dentry->d_sb);
 	msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];

fs/nfs/proc.c

@@ -321,7 +321,9 @@ nfs_proc_remove(struct inode *dir, struct dentry *dentry)
 }
 
 static void
-nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dentry)
+nfs_proc_unlink_setup(struct rpc_message *msg,
+		struct dentry *dentry,
+		struct inode *inode)
 {
 	msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
 }

fs/nfs/unlink.c

@@ -85,7 +85,7 @@ static const struct rpc_call_ops nfs_unlink_ops = {
 	.rpc_call_prepare = nfs_unlink_prepare,
 };
 
-static void nfs_do_call_unlink(struct nfs_unlinkdata *data)
+static void nfs_do_call_unlink(struct inode *inode, struct nfs_unlinkdata *data)
 {
 	struct rpc_message msg = {
 		.rpc_argp = &data->args,
@@ -105,7 +105,7 @@ static void nfs_do_call_unlink(struct nfs_unlinkdata *data)
 	data->args.fh = NFS_FH(dir);
 	nfs_fattr_init(data->res.dir_attr);
 
-	NFS_PROTO(dir)->unlink_setup(&msg, data->dentry);
+	NFS_PROTO(dir)->unlink_setup(&msg, data->dentry, inode);
 
 	task_setup_data.rpc_client = NFS_CLIENT(dir);
 	task = rpc_run_task(&task_setup_data);
@@ -113,7 +113,7 @@ static void nfs_do_call_unlink(struct nfs_unlinkdata *data)
 		rpc_put_task_async(task);
 }
 
-static int nfs_call_unlink(struct dentry *dentry, struct nfs_unlinkdata *data)
+static int nfs_call_unlink(struct dentry *dentry, struct inode *inode, struct nfs_unlinkdata *data)
 {
 	struct inode *dir = d_inode(dentry->d_parent);
 	struct dentry *alias;
@@ -153,7 +153,7 @@ static int nfs_call_unlink(struct dentry *dentry, struct nfs_unlinkdata *data)
 		return ret;
 	}
 	data->dentry = alias;
-	nfs_do_call_unlink(data);
+	nfs_do_call_unlink(inode, data);
 	return 1;
 }
 
@@ -231,7 +231,7 @@ nfs_complete_unlink(struct dentry *dentry, struct inode *inode)
 	dentry->d_fsdata = NULL;
 	spin_unlock(&dentry->d_lock);
 
-	if (NFS_STALE(inode) || !nfs_call_unlink(dentry, data))
+	if (NFS_STALE(inode) || !nfs_call_unlink(dentry, inode, data))
 		nfs_free_unlinkdata(data);
 }
 

include/linux/nfs_xdr.h

@@ -1591,7 +1591,7 @@ struct nfs_rpc_ops {
 	int	(*create)  (struct inode *, struct dentry *,
 			    struct iattr *, int);
 	int	(*remove)  (struct inode *, struct dentry *);
-	void	(*unlink_setup)  (struct rpc_message *, struct dentry *);
+	void	(*unlink_setup)  (struct rpc_message *, struct dentry *, struct inode *);
 	void	(*unlink_rpc_prepare) (struct rpc_task *, struct nfs_unlinkdata *);
 	int	(*unlink_done) (struct rpc_task *, struct inode *);
 	void	(*rename_setup)  (struct rpc_message *msg,