drivers/staging/lustre/lustre/lov/lovsub_page.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) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 /*
  31  * This file is part of Lustre, http://www.lustre.org/
  32  * Lustre is a trademark of Sun Microsystems, Inc.
  33  *
  34  * Implementation of cl_page for LOVSUB layer.
  35  *
  36  *   Author: Nikita Danilov <nikita.danilov@sun.com>
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_LOV
  40
  41 #include "lov_cl_internal.h"
  42
  43 /** \addtogroup lov
  44  *  @{
  45  */
  46
  47 /*****************************************************************************
  48  *
  49  * Lovsub page operations.
  50  *
  51  */
  52
  53 static void lovsub_page_fini(const struct lu_env *env,
  54                              struct cl_page_slice *slice)
  55 {
  56 }
  57
  58 static const struct cl_page_operations lovsub_page_ops = {
  59         .cpo_fini   = lovsub_page_fini
  60 };
  61
  62 int lovsub_page_init(const struct lu_env *env, struct cl_object *obj,
  63                         struct cl_page *page, struct page *unused)
  64 {
  65         struct lovsub_page *lsb = cl_object_page_slice(obj, page);
  66
  67         cl_page_slice_add(page, &lsb->lsb_cl, obj, &lovsub_page_ops);
  68         return 0;
  69 }
  70
  71 /** @} lov */