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d7e09d03 PT |
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) 2008, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
1dc563a6 AD |
29 | * |
30 | * Copyright (c) 2014, 2015, Intel Corporation. | |
d7e09d03 PT |
31 | */ |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | * | |
36 | * Implementation of cl_lock for VVP layer. | |
37 | * | |
38 | * Author: Nikita Danilov <nikita.danilov@sun.com> | |
39 | */ | |
40 | ||
41 | #define DEBUG_SUBSYSTEM S_LLITE | |
42 | ||
4a4eee07 | 43 | #include "../include/obd_support.h" |
67a235f5 | 44 | #include "../include/lustre_lite.h" |
d7e09d03 PT |
45 | |
46 | #include "vvp_internal.h" | |
47 | ||
48 | /***************************************************************************** | |
49 | * | |
50 | * Vvp lock functions. | |
51 | * | |
52 | */ | |
53 | ||
4a4eee07 JH |
54 | static void vvp_lock_fini(const struct lu_env *env, struct cl_lock_slice *slice) |
55 | { | |
56 | struct vvp_lock *vlk = cl2vvp_lock(slice); | |
57 | ||
58 | kmem_cache_free(vvp_lock_kmem, vlk); | |
59 | } | |
60 | ||
61 | static int vvp_lock_enqueue(const struct lu_env *env, | |
62 | const struct cl_lock_slice *slice, | |
63 | struct cl_io *unused, struct cl_sync_io *anchor) | |
64 | { | |
65 | CLOBINVRNT(env, slice->cls_obj, vvp_object_invariant(slice->cls_obj)); | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
d7e09d03 | 70 | static const struct cl_lock_operations vvp_lock_ops = { |
4a4eee07 JH |
71 | .clo_fini = vvp_lock_fini, |
72 | .clo_enqueue = vvp_lock_enqueue, | |
d7e09d03 PT |
73 | }; |
74 | ||
75 | int vvp_lock_init(const struct lu_env *env, struct cl_object *obj, | |
4a4eee07 | 76 | struct cl_lock *lock, const struct cl_io *unused) |
d7e09d03 | 77 | { |
4a4eee07 JH |
78 | struct vvp_lock *vlk; |
79 | int result; | |
80 | ||
81 | CLOBINVRNT(env, obj, vvp_object_invariant(obj)); | |
82 | ||
83 | vlk = kmem_cache_zalloc(vvp_lock_kmem, GFP_NOFS); | |
84 | if (vlk) { | |
85 | cl_lock_slice_add(lock, &vlk->vlk_cl, obj, &vvp_lock_ops); | |
86 | result = 0; | |
87 | } else { | |
88 | result = -ENOMEM; | |
89 | } | |
90 | return result; | |
d7e09d03 | 91 | } |