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// SPDX-License-Identifier: GPL-2.0
/*
* 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) 2014, 2015, 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 VVP layer.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
*/
#define DEBUG_SUBSYSTEM S_LLITE
#include <obd_support.h>
#include "vvp_internal.h"
/*****************************************************************************
*
* Vvp lock functions.
*
*/
static void vvp_lock_fini(const struct lu_env *env, struct cl_lock_slice *slice)
{
struct vvp_lock *vlk = cl2vvp_lock(slice);
kmem_cache_free(vvp_lock_kmem, vlk);
}
static int vvp_lock_enqueue(const struct lu_env *env,
const struct cl_lock_slice *slice,
struct cl_io *unused, struct cl_sync_io *anchor)
{
CLOBINVRNT(env, slice->cls_obj, vvp_object_invariant(slice->cls_obj));
return 0;
}
static const struct cl_lock_operations vvp_lock_ops = {
.clo_fini = vvp_lock_fini,
.clo_enqueue = vvp_lock_enqueue,
};
int vvp_lock_init(const struct lu_env *env, struct cl_object *obj,
struct cl_lock *lock, const struct cl_io *unused)
{
struct vvp_lock *vlk;
int result;
CLOBINVRNT(env, obj, vvp_object_invariant(obj));
vlk = kmem_cache_zalloc(vvp_lock_kmem, GFP_NOFS);
if (vlk) {
cl_lock_slice_add(lock, &vlk->vlk_cl, obj, &vvp_lock_ops);
result = 0;
} else {
result = -ENOMEM;
}
return result;
}
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