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_device, cl_req for OSC layer.
37 *
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
39 */
40
41 #define DEBUG_SUBSYSTEM S_OSC
42
43 /* class_name2obd() */
44 #include "../include/obd_class.h"
45
46 #include "osc_cl_internal.h"
47
48 /** \addtogroup osc
49 * @{
50 */
51
52 struct kmem_cache *osc_lock_kmem;
53 struct kmem_cache *osc_object_kmem;
54 struct kmem_cache *osc_thread_kmem;
55 struct kmem_cache *osc_session_kmem;
56 struct kmem_cache *osc_req_kmem;
57 struct kmem_cache *osc_extent_kmem;
58 struct kmem_cache *osc_quota_kmem;
59
60 struct lu_kmem_descr osc_caches[] = {
61 {
62 .ckd_cache = &osc_lock_kmem,
63 .ckd_name = "osc_lock_kmem",
64 .ckd_size = sizeof(struct osc_lock)
65 },
66 {
67 .ckd_cache = &osc_object_kmem,
68 .ckd_name = "osc_object_kmem",
69 .ckd_size = sizeof(struct osc_object)
70 },
71 {
72 .ckd_cache = &osc_thread_kmem,
73 .ckd_name = "osc_thread_kmem",
74 .ckd_size = sizeof(struct osc_thread_info)
75 },
76 {
77 .ckd_cache = &osc_session_kmem,
78 .ckd_name = "osc_session_kmem",
79 .ckd_size = sizeof(struct osc_session)
80 },
81 {
82 .ckd_cache = &osc_req_kmem,
83 .ckd_name = "osc_req_kmem",
84 .ckd_size = sizeof(struct osc_req)
85 },
86 {
87 .ckd_cache = &osc_extent_kmem,
88 .ckd_name = "osc_extent_kmem",
89 .ckd_size = sizeof(struct osc_extent)
90 },
91 {
92 .ckd_cache = &osc_quota_kmem,
93 .ckd_name = "osc_quota_kmem",
94 .ckd_size = sizeof(struct osc_quota_info)
95 },
96 {
97 .ckd_cache = NULL
98 }
99 };
100
101 struct lock_class_key osc_ast_guard_class;
102
103 /*****************************************************************************
104 *
105 * Type conversions.
106 *
107 */
108
osc2lu_dev(struct osc_device * osc)109 static struct lu_device *osc2lu_dev(struct osc_device *osc)
110 {
111 return &osc->od_cl.cd_lu_dev;
112 }
113
114 /*****************************************************************************
115 *
116 * Osc device and device type functions.
117 *
118 */
119
osc_key_init(const struct lu_context * ctx,struct lu_context_key * key)120 static void *osc_key_init(const struct lu_context *ctx,
121 struct lu_context_key *key)
122 {
123 struct osc_thread_info *info;
124
125 info = kmem_cache_alloc(osc_thread_kmem, GFP_NOFS | __GFP_ZERO);
126 if (info == NULL)
127 info = ERR_PTR(-ENOMEM);
128 return info;
129 }
130
osc_key_fini(const struct lu_context * ctx,struct lu_context_key * key,void * data)131 static void osc_key_fini(const struct lu_context *ctx,
132 struct lu_context_key *key, void *data)
133 {
134 struct osc_thread_info *info = data;
135
136 kmem_cache_free(osc_thread_kmem, info);
137 }
138
139 struct lu_context_key osc_key = {
140 .lct_tags = LCT_CL_THREAD,
141 .lct_init = osc_key_init,
142 .lct_fini = osc_key_fini
143 };
144
osc_session_init(const struct lu_context * ctx,struct lu_context_key * key)145 static void *osc_session_init(const struct lu_context *ctx,
146 struct lu_context_key *key)
147 {
148 struct osc_session *info;
149
150 info = kmem_cache_alloc(osc_session_kmem, GFP_NOFS | __GFP_ZERO);
151 if (info == NULL)
152 info = ERR_PTR(-ENOMEM);
153 return info;
154 }
155
osc_session_fini(const struct lu_context * ctx,struct lu_context_key * key,void * data)156 static void osc_session_fini(const struct lu_context *ctx,
157 struct lu_context_key *key, void *data)
158 {
159 struct osc_session *info = data;
160
161 kmem_cache_free(osc_session_kmem, info);
162 }
163
164 struct lu_context_key osc_session_key = {
165 .lct_tags = LCT_SESSION,
166 .lct_init = osc_session_init,
167 .lct_fini = osc_session_fini
168 };
169
170 /* type constructor/destructor: osc_type_{init,fini,start,stop}(). */
171 LU_TYPE_INIT_FINI(osc, &osc_key, &osc_session_key);
172
osc_cl_process_config(const struct lu_env * env,struct lu_device * d,struct lustre_cfg * cfg)173 static int osc_cl_process_config(const struct lu_env *env,
174 struct lu_device *d, struct lustre_cfg *cfg)
175 {
176 return osc_process_config_base(d->ld_obd, cfg);
177 }
178
179 static const struct lu_device_operations osc_lu_ops = {
180 .ldo_object_alloc = osc_object_alloc,
181 .ldo_process_config = osc_cl_process_config,
182 .ldo_recovery_complete = NULL
183 };
184
185 static const struct cl_device_operations osc_cl_ops = {
186 .cdo_req_init = osc_req_init
187 };
188
osc_device_init(const struct lu_env * env,struct lu_device * d,const char * name,struct lu_device * next)189 static int osc_device_init(const struct lu_env *env, struct lu_device *d,
190 const char *name, struct lu_device *next)
191 {
192 return 0;
193 }
194
osc_device_fini(const struct lu_env * env,struct lu_device * d)195 static struct lu_device *osc_device_fini(const struct lu_env *env,
196 struct lu_device *d)
197 {
198 return NULL;
199 }
200
osc_device_free(const struct lu_env * env,struct lu_device * d)201 static struct lu_device *osc_device_free(const struct lu_env *env,
202 struct lu_device *d)
203 {
204 struct osc_device *od = lu2osc_dev(d);
205
206 cl_device_fini(lu2cl_dev(d));
207 kfree(od);
208 return NULL;
209 }
210
osc_device_alloc(const struct lu_env * env,struct lu_device_type * t,struct lustre_cfg * cfg)211 static struct lu_device *osc_device_alloc(const struct lu_env *env,
212 struct lu_device_type *t,
213 struct lustre_cfg *cfg)
214 {
215 struct lu_device *d;
216 struct osc_device *od;
217 struct obd_device *obd;
218 int rc;
219
220 od = kzalloc(sizeof(*od), GFP_NOFS);
221 if (!od)
222 return ERR_PTR(-ENOMEM);
223
224 cl_device_init(&od->od_cl, t);
225 d = osc2lu_dev(od);
226 d->ld_ops = &osc_lu_ops;
227 od->od_cl.cd_ops = &osc_cl_ops;
228
229 /* Setup OSC OBD */
230 obd = class_name2obd(lustre_cfg_string(cfg, 0));
231 LASSERT(obd != NULL);
232 rc = osc_setup(obd, cfg);
233 if (rc) {
234 osc_device_free(env, d);
235 return ERR_PTR(rc);
236 }
237 od->od_exp = obd->obd_self_export;
238 return d;
239 }
240
241 static const struct lu_device_type_operations osc_device_type_ops = {
242 .ldto_init = osc_type_init,
243 .ldto_fini = osc_type_fini,
244
245 .ldto_start = osc_type_start,
246 .ldto_stop = osc_type_stop,
247
248 .ldto_device_alloc = osc_device_alloc,
249 .ldto_device_free = osc_device_free,
250
251 .ldto_device_init = osc_device_init,
252 .ldto_device_fini = osc_device_fini
253 };
254
255 struct lu_device_type osc_device_type = {
256 .ldt_tags = LU_DEVICE_CL,
257 .ldt_name = LUSTRE_OSC_NAME,
258 .ldt_ops = &osc_device_type_ops,
259 .ldt_ctx_tags = LCT_CL_THREAD
260 };
261
262 /** @} osc */
263