drivers/staging/lustre/lustre/ldlm/ldlm_inodebits.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   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.
   9  *
  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).
  15  *
  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
  19  *
  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
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/ldlm/ldlm_inodebits.c
  37  *
  38  * Author: Peter Braam <braam@clusterfs.com>
  39  * Author: Phil Schwan <phil@clusterfs.com>
  40  */
  41
  42 /**
  43  * This file contains implementation of IBITS lock type
  44  *
  45  * IBITS lock type contains a bit mask determining various properties of an
  46  * object. The meanings of specific bits are specific to the caller and are
  47  * opaque to LDLM code.
  48  *
  49  * Locks with intersecting bitmasks and conflicting lock modes (e.g.  LCK_PW)
  50  * are considered conflicting.  See the lock mode compatibility matrix
  51  * in lustre_dlm.h.
  52  */
  53
  54 #define DEBUG_SUBSYSTEM S_LDLM
  55
  56 #include "../include/lustre_dlm.h"
  57 #include "../include/obd_support.h"
  58 #include "../include/lustre_lib.h"
  59 #include "ldlm_internal.h"
  60
  61
  62 void ldlm_ibits_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
  63                                      ldlm_policy_data_t *lpolicy)
  64 {
  65         memset(lpolicy, 0, sizeof(*lpolicy));
  66         lpolicy->l_inodebits.bits = wpolicy->l_inodebits.bits;
  67 }
  68
  69 void ldlm_ibits_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
  70                                      ldlm_wire_policy_data_t *wpolicy)
  71 {
  72         memset(wpolicy, 0, sizeof(*wpolicy));
  73         wpolicy->l_inodebits.bits = lpolicy->l_inodebits.bits;
  74 }