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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ldlm/ldlm_plain.c
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Phil Schwan <phil@clusterfs.com>
43 * This file contains implementation of PLAIN lock type.
45 * PLAIN locks are the simplest form of LDLM locking, and are used when
46 * there only needs to be a single lock on a resource. This avoids some
47 * of the complexity of EXTENT and IBITS lock types, but doesn't allow
48 * different "parts" of a resource to be locked concurrently. Example
49 * use cases for PLAIN locks include locking of MGS configuration logs
50 * and (as of Lustre 2.4) quota records.
53 #define DEBUG_SUBSYSTEM S_LDLM
55 #include "../include/lustre_dlm.h"
56 #include "../include/obd_support.h"
57 #include "../include/lustre_lib.h"
59 #include "ldlm_internal.h"
62 void ldlm_plain_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
63 ldlm_policy_data_t *lpolicy)
65 /* No policy for plain locks */
68 void ldlm_plain_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
69 ldlm_wire_policy_data_t *wpolicy)
71 /* No policy for plain locks */