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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/ldlm/ldlm_plain.c
34 * Author: Peter Braam <braam@clusterfs.com>
35 * Author: Phil Schwan <phil@clusterfs.com>
39 * This file contains implementation of PLAIN lock type.
41 * PLAIN locks are the simplest form of LDLM locking, and are used when
42 * there only needs to be a single lock on a resource. This avoids some
43 * of the complexity of EXTENT and IBITS lock types, but doesn't allow
44 * different "parts" of a resource to be locked concurrently. Example
45 * use cases for PLAIN locks include locking of MGS configuration logs
46 * and (as of Lustre 2.4) quota records.
49 #define DEBUG_SUBSYSTEM S_LDLM
51 #include <lustre_dlm.h>
52 #include <obd_support.h>
53 #include <lustre_lib.h>
55 #include "ldlm_internal.h"
57 void ldlm_plain_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
58 union ldlm_policy_data *lpolicy)
60 /* No policy for plain locks */
63 void ldlm_plain_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
64 union ldlm_wire_policy_data *wpolicy)
66 /* No policy for plain locks */