1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
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8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
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12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
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19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Implementation of cl_device, cl_req for OSC layer.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
41 /** \addtogroup osc osc @{ */
43 #define DEBUG_SUBSYSTEM S_OSC
45 /* class_name2obd() */
46 #include <obd_class.h>
48 #include "osc_cl_internal.h"
50 cfs_mem_cache_t *osc_page_kmem;
51 cfs_mem_cache_t *osc_lock_kmem;
52 cfs_mem_cache_t *osc_object_kmem;
53 cfs_mem_cache_t *osc_thread_kmem;
54 cfs_mem_cache_t *osc_session_kmem;
55 cfs_mem_cache_t *osc_req_kmem;
57 struct lu_kmem_descr osc_caches[] = {
59 .ckd_cache = &osc_page_kmem,
60 .ckd_name = "osc_page_kmem",
61 .ckd_size = sizeof (struct osc_page)
64 .ckd_cache = &osc_lock_kmem,
65 .ckd_name = "osc_lock_kmem",
66 .ckd_size = sizeof (struct osc_lock)
69 .ckd_cache = &osc_object_kmem,
70 .ckd_name = "osc_object_kmem",
71 .ckd_size = sizeof (struct osc_object)
74 .ckd_cache = &osc_thread_kmem,
75 .ckd_name = "osc_thread_kmem",
76 .ckd_size = sizeof (struct osc_thread_info)
79 .ckd_cache = &osc_session_kmem,
80 .ckd_name = "osc_session_kmem",
81 .ckd_size = sizeof (struct osc_session)
84 .ckd_cache = &osc_req_kmem,
85 .ckd_name = "osc_req_kmem",
86 .ckd_size = sizeof (struct osc_req)
93 struct lock_class_key osc_ast_guard_class;
95 /*****************************************************************************
101 static struct lu_device *osc2lu_dev(struct osc_device *osc)
103 return &osc->od_cl.cd_lu_dev;
106 /*****************************************************************************
108 * Osc device and device type functions.
112 static void *osc_key_init(const struct lu_context *ctx,
113 struct lu_context_key *key)
115 struct osc_thread_info *info;
117 OBD_SLAB_ALLOC_PTR(info, osc_thread_kmem);
119 info = ERR_PTR(-ENOMEM);
123 static void osc_key_fini(const struct lu_context *ctx,
124 struct lu_context_key *key, void *data)
126 struct osc_thread_info *info = data;
127 OBD_SLAB_FREE_PTR(info, osc_thread_kmem);
130 struct lu_context_key osc_key = {
131 .lct_tags = LCT_CL_THREAD,
132 .lct_init = osc_key_init,
133 .lct_fini = osc_key_fini
136 static void *osc_session_init(const struct lu_context *ctx,
137 struct lu_context_key *key)
139 struct osc_session *info;
141 OBD_SLAB_ALLOC_PTR(info, osc_session_kmem);
143 info = ERR_PTR(-ENOMEM);
147 static void osc_session_fini(const struct lu_context *ctx,
148 struct lu_context_key *key, void *data)
150 struct osc_session *info = data;
151 OBD_SLAB_FREE_PTR(info, osc_session_kmem);
154 struct lu_context_key osc_session_key = {
155 .lct_tags = LCT_SESSION,
156 .lct_init = osc_session_init,
157 .lct_fini = osc_session_fini
160 /* type constructor/destructor: osc_type_{init,fini,start,stop}(). */
161 LU_TYPE_INIT_FINI(osc, &osc_key, &osc_session_key);
163 static int osc_cl_process_config(const struct lu_env *env,
164 struct lu_device *d, struct lustre_cfg *cfg)
167 RETURN(osc_process_config_base(d->ld_obd, cfg));
170 static const struct lu_device_operations osc_lu_ops = {
171 .ldo_object_alloc = osc_object_alloc,
172 .ldo_process_config = osc_cl_process_config,
173 .ldo_recovery_complete = NULL
176 static const struct cl_device_operations osc_cl_ops = {
177 .cdo_req_init = osc_req_init
180 static int osc_device_init(const struct lu_env *env, struct lu_device *d,
181 const char *name, struct lu_device *next)
186 static struct lu_device *osc_device_fini(const struct lu_env *env,
192 static struct lu_device *osc_device_free(const struct lu_env *env,
195 struct osc_device *od = lu2osc_dev(d);
197 cl_device_fini(lu2cl_dev(d));
202 static struct lu_device *osc_device_alloc(const struct lu_env *env,
203 struct lu_device_type *t,
204 struct lustre_cfg *cfg)
207 struct osc_device *od;
208 struct obd_device *obd;
213 RETURN(ERR_PTR(-ENOMEM));
215 cl_device_init(&od->od_cl, t);
217 d->ld_ops = &osc_lu_ops;
218 od->od_cl.cd_ops = &osc_cl_ops;
221 obd = class_name2obd(lustre_cfg_string(cfg, 0));
222 LASSERT(obd != NULL);
223 rc = osc_setup(obd, cfg);
225 osc_device_free(env, d);
228 od->od_exp = obd->obd_self_export;
232 static const struct lu_device_type_operations osc_device_type_ops = {
233 .ldto_init = osc_type_init,
234 .ldto_fini = osc_type_fini,
236 .ldto_start = osc_type_start,
237 .ldto_stop = osc_type_stop,
239 .ldto_device_alloc = osc_device_alloc,
240 .ldto_device_free = osc_device_free,
242 .ldto_device_init = osc_device_init,
243 .ldto_device_fini = osc_device_fini
246 struct lu_device_type osc_device_type = {
247 .ldt_tags = LU_DEVICE_CL,
248 .ldt_name = LUSTRE_OSC_NAME,
249 .ldt_ops = &osc_device_type_ops,
250 .ldt_ctx_tags = LCT_CL_THREAD