4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2014, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/mdd/mdd_lock.c
34 * Lustre Metadata Server (mdd) routines
36 * Author: Mike Pershin <tappro@clusterfs.com>
39 #define DEBUG_SUBSYSTEM S_MDS
41 #include <linux/module.h>
42 #include <lustre_ver.h>
43 #include "mdd_internal.h"
45 void mdd_write_lock(const struct lu_env *env, struct mdd_object *obj,
46 enum mdd_object_role role)
48 struct dt_object *next = mdd_object_child(obj);
50 dt_write_lock(env, next, role);
53 void mdd_read_lock(const struct lu_env *env, struct mdd_object *obj,
54 enum mdd_object_role role)
56 struct dt_object *next = mdd_object_child(obj);
58 dt_read_lock(env, next, role);
61 void mdd_write_unlock(const struct lu_env *env, struct mdd_object *obj)
63 struct dt_object *next = mdd_object_child(obj);
65 dt_write_unlock(env, next);
68 void mdd_read_unlock(const struct lu_env *env, struct mdd_object *obj)
70 struct dt_object *next = mdd_object_child(obj);
72 dt_read_unlock(env, next);
75 int mdd_write_locked(const struct lu_env *env, struct mdd_object *obj)
77 struct dt_object *next = mdd_object_child(obj);
79 return dt_write_locked(env, next);