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.
29 *
30 * Copyright (c) 2012, 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 * Implementation of cl_object for LOVSUB layer.
37 *
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
39 */
40
41 #define DEBUG_SUBSYSTEM S_LOV
42
43 #include "lov_cl_internal.h"
44
45 /** \addtogroup lov
46 * @{
47 */
48
49 /*****************************************************************************
50 *
51 * Lovsub object operations.
52 *
53 */
54
lovsub_object_init(const struct lu_env * env,struct lu_object * obj,const struct lu_object_conf * conf)55 int lovsub_object_init(const struct lu_env *env, struct lu_object *obj,
56 const struct lu_object_conf *conf)
57 {
58 struct lovsub_device *dev = lu2lovsub_dev(obj->lo_dev);
59 struct lu_object *below;
60 struct lu_device *under;
61
62 int result;
63
64 under = &dev->acid_next->cd_lu_dev;
65 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
66 if (below != NULL) {
67 lu_object_add(obj, below);
68 cl_object_page_init(lu2cl(obj), sizeof(struct lovsub_page));
69 result = 0;
70 } else
71 result = -ENOMEM;
72 return result;
73
74 }
75
lovsub_object_free(const struct lu_env * env,struct lu_object * obj)76 static void lovsub_object_free(const struct lu_env *env, struct lu_object *obj)
77 {
78 struct lovsub_object *los = lu2lovsub(obj);
79 struct lov_object *lov = los->lso_super;
80
81 /* We can't assume lov was assigned here, because of the shadow
82 * object handling in lu_object_find.
83 */
84 if (lov) {
85 LASSERT(lov->lo_type == LLT_RAID0);
86 LASSERT(lov->u.raid0.lo_sub[los->lso_index] == los);
87 spin_lock(&lov->u.raid0.lo_sub_lock);
88 lov->u.raid0.lo_sub[los->lso_index] = NULL;
89 spin_unlock(&lov->u.raid0.lo_sub_lock);
90 }
91
92 lu_object_fini(obj);
93 lu_object_header_fini(&los->lso_header.coh_lu);
94 OBD_SLAB_FREE_PTR(los, lovsub_object_kmem);
95 }
96
lovsub_object_print(const struct lu_env * env,void * cookie,lu_printer_t p,const struct lu_object * obj)97 static int lovsub_object_print(const struct lu_env *env, void *cookie,
98 lu_printer_t p, const struct lu_object *obj)
99 {
100 struct lovsub_object *los = lu2lovsub(obj);
101
102 return (*p)(env, cookie, "[%d]", los->lso_index);
103 }
104
lovsub_attr_set(const struct lu_env * env,struct cl_object * obj,const struct cl_attr * attr,unsigned valid)105 static int lovsub_attr_set(const struct lu_env *env, struct cl_object *obj,
106 const struct cl_attr *attr, unsigned valid)
107 {
108 struct lov_object *lov = cl2lovsub(obj)->lso_super;
109
110 lov_r0(lov)->lo_attr_valid = 0;
111 return 0;
112 }
113
lovsub_object_glimpse(const struct lu_env * env,const struct cl_object * obj,struct ost_lvb * lvb)114 static int lovsub_object_glimpse(const struct lu_env *env,
115 const struct cl_object *obj,
116 struct ost_lvb *lvb)
117 {
118 struct lovsub_object *los = cl2lovsub(obj);
119
120 return cl_object_glimpse(env, &los->lso_super->lo_cl, lvb);
121 }
122
123
124
125 static const struct cl_object_operations lovsub_ops = {
126 .coo_page_init = lovsub_page_init,
127 .coo_lock_init = lovsub_lock_init,
128 .coo_attr_set = lovsub_attr_set,
129 .coo_glimpse = lovsub_object_glimpse
130 };
131
132 static const struct lu_object_operations lovsub_lu_obj_ops = {
133 .loo_object_init = lovsub_object_init,
134 .loo_object_delete = NULL,
135 .loo_object_release = NULL,
136 .loo_object_free = lovsub_object_free,
137 .loo_object_print = lovsub_object_print,
138 .loo_object_invariant = NULL
139 };
140
lovsub_object_alloc(const struct lu_env * env,const struct lu_object_header * unused,struct lu_device * dev)141 struct lu_object *lovsub_object_alloc(const struct lu_env *env,
142 const struct lu_object_header *unused,
143 struct lu_device *dev)
144 {
145 struct lovsub_object *los;
146 struct lu_object *obj;
147
148 OBD_SLAB_ALLOC_PTR_GFP(los, lovsub_object_kmem, GFP_NOFS);
149 if (los != NULL) {
150 struct cl_object_header *hdr;
151
152 obj = lovsub2lu(los);
153 hdr = &los->lso_header;
154 cl_object_header_init(hdr);
155 lu_object_init(obj, &hdr->coh_lu, dev);
156 lu_object_add_top(&hdr->coh_lu, obj);
157 los->lso_cl.co_ops = &lovsub_ops;
158 obj->lo_ops = &lovsub_lu_obj_ops;
159 } else
160 obj = NULL;
161 return obj;
162 }
163
164 /** @} lov */
165