| /* |
| * GPL HEADER START |
| * |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 only, |
| * as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License version 2 for more details (a copy is included |
| * in the LICENSE file that accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License |
| * version 2 along with this program; If not, see |
| * http://www.gnu.org/licenses/gpl-2.0.html |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2011, 2012, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| * |
| * Implementation of cl_lock for LOVSUB layer. |
| * |
| * Author: Nikita Danilov <nikita.danilov@sun.com> |
| */ |
| |
| #define DEBUG_SUBSYSTEM S_LOV |
| |
| #include "lov_cl_internal.h" |
| |
| /** \addtogroup lov |
| * @{ |
| */ |
| |
| /***************************************************************************** |
| * |
| * Lovsub lock operations. |
| * |
| */ |
| |
| static void lovsub_lock_fini(const struct lu_env *env, |
| struct cl_lock_slice *slice) |
| { |
| struct lovsub_lock *lsl; |
| |
| lsl = cl2lovsub_lock(slice); |
| LASSERT(list_empty(&lsl->lss_parents)); |
| kmem_cache_free(lovsub_lock_kmem, lsl); |
| } |
| |
| static const struct cl_lock_operations lovsub_lock_ops = { |
| .clo_fini = lovsub_lock_fini, |
| }; |
| |
| int lovsub_lock_init(const struct lu_env *env, struct cl_object *obj, |
| struct cl_lock *lock, const struct cl_io *io) |
| { |
| struct lovsub_lock *lsk; |
| int result; |
| |
| lsk = kmem_cache_zalloc(lovsub_lock_kmem, GFP_NOFS); |
| if (lsk) { |
| INIT_LIST_HEAD(&lsk->lss_parents); |
| cl_lock_slice_add(lock, &lsk->lss_cl, obj, &lovsub_lock_ops); |
| result = 0; |
| } else { |
| result = -ENOMEM; |
| } |
| return result; |
| } |
| |
| /** @} lov */ |