4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * Implementation of cl_device, for OSC layer.
33 * Author: Nikita Danilov <nikita.danilov@sun.com>
36 #define DEBUG_SUBSYSTEM S_OSC
38 /* class_name2obd() */
39 #include <obd_class.h>
40 #include <lustre_osc.h>
41 #include <uapi/linux/lustre/lustre_param.h>
43 #include "osc_internal.h"
49 struct kmem_cache *osc_lock_kmem;
50 EXPORT_SYMBOL(osc_lock_kmem);
51 struct kmem_cache *osc_object_kmem;
52 EXPORT_SYMBOL(osc_object_kmem);
54 struct kmem_cache *osc_thread_kmem;
55 struct kmem_cache *osc_session_kmem;
56 struct kmem_cache *osc_extent_kmem;
57 struct kmem_cache *osc_obdo_kmem;
59 struct lu_kmem_descr osc_caches[] = {
61 .ckd_cache = &osc_lock_kmem,
62 .ckd_name = "osc_lock_kmem",
63 .ckd_size = sizeof (struct osc_lock)
66 .ckd_cache = &osc_object_kmem,
67 .ckd_name = "osc_object_kmem",
68 .ckd_size = sizeof (struct osc_object)
71 .ckd_cache = &osc_thread_kmem,
72 .ckd_name = "osc_thread_kmem",
73 .ckd_size = sizeof (struct osc_thread_info)
76 .ckd_cache = &osc_session_kmem,
77 .ckd_name = "osc_session_kmem",
78 .ckd_size = sizeof (struct osc_session)
81 .ckd_cache = &osc_extent_kmem,
82 .ckd_name = "osc_extent_kmem",
83 .ckd_size = sizeof (struct osc_extent)
86 .ckd_cache = &osc_obdo_kmem,
87 .ckd_name = "osc_obdo_kmem",
88 .ckd_size = sizeof(struct obdo)
95 /*****************************************************************************
97 * Osc device and device type functions.
101 static void *osc_key_init(const struct lu_context *ctx,
102 struct lu_context_key *key)
104 struct osc_thread_info *info;
106 OBD_SLAB_ALLOC_PTR_GFP(info, osc_thread_kmem, GFP_NOFS);
108 info = ERR_PTR(-ENOMEM);
112 static void osc_key_fini(const struct lu_context *ctx,
113 struct lu_context_key *key, void *data)
115 struct osc_thread_info *info = data;
117 lu_buf_free(&info->oti_ladvise_buf);
118 OBD_SLAB_FREE_PTR(info, osc_thread_kmem);
121 struct lu_context_key osc_key = {
122 .lct_tags = LCT_CL_THREAD,
123 .lct_init = osc_key_init,
124 .lct_fini = osc_key_fini
126 EXPORT_SYMBOL(osc_key);
128 static void *osc_session_init(const struct lu_context *ctx,
129 struct lu_context_key *key)
131 struct osc_session *info;
133 OBD_SLAB_ALLOC_PTR_GFP(info, osc_session_kmem, GFP_NOFS);
135 info = ERR_PTR(-ENOMEM);
139 static void osc_session_fini(const struct lu_context *ctx,
140 struct lu_context_key *key, void *data)
142 struct osc_session *info = data;
143 OBD_SLAB_FREE_PTR(info, osc_session_kmem);
146 struct lu_context_key osc_session_key = {
147 .lct_tags = LCT_SESSION,
148 .lct_init = osc_session_init,
149 .lct_fini = osc_session_fini
151 EXPORT_SYMBOL(osc_session_key);
153 /* type constructor/destructor: osc_type_{init,fini,start,stop}(). */
154 LU_TYPE_INIT_FINI(osc, &osc_key, &osc_session_key);
156 static int osc_process_config(const struct lu_env *env, struct lu_device *d,
157 struct lustre_cfg *cfg)
159 ssize_t count = class_modify_config(cfg, PARAM_OSC,
160 &d->ld_obd->obd_kset.kobj);
161 return count > 0 ? 0 : count;
164 static const struct lu_device_operations osc_lu_ops = {
165 .ldo_object_alloc = osc_object_alloc,
166 .ldo_process_config = osc_process_config,
167 .ldo_recovery_complete = NULL
170 int osc_device_init(const struct lu_env *env, struct lu_device *d,
171 const char *name, struct lu_device *next)
175 EXPORT_SYMBOL(osc_device_init);
177 struct lu_device *osc_device_fini(const struct lu_env *env,
182 EXPORT_SYMBOL(osc_device_fini);
184 struct lu_device *osc_device_free(const struct lu_env *env,
187 struct osc_device *oc = lu2osc_dev(d);
189 cl_device_fini(lu2cl_dev(d));
193 EXPORT_SYMBOL(osc_device_free);
195 static struct lu_device *osc_device_alloc(const struct lu_env *env,
196 struct lu_device_type *t,
197 struct lustre_cfg *cfg)
200 struct osc_device *osc;
201 struct obd_device *obd;
206 RETURN(ERR_PTR(-ENOMEM));
208 cl_device_init(&osc->osc_cl, t);
210 d->ld_ops = &osc_lu_ops;
213 obd = class_name2obd(lustre_cfg_string(cfg, 0));
214 LASSERT(obd != NULL);
215 rc = osc_setup(obd, cfg);
217 osc_device_free(env, d);
220 osc->osc_exp = obd->obd_self_export;
221 osc->osc_stats.os_init = ktime_get_real();
225 static const struct lu_device_type_operations osc_device_type_ops = {
226 .ldto_init = osc_type_init,
227 .ldto_fini = osc_type_fini,
229 .ldto_start = osc_type_start,
230 .ldto_stop = osc_type_stop,
232 .ldto_device_alloc = osc_device_alloc,
233 .ldto_device_free = osc_device_free,
235 .ldto_device_init = osc_device_init,
236 .ldto_device_fini = osc_device_fini
239 struct lu_device_type osc_device_type = {
240 .ldt_tags = LU_DEVICE_CL,
241 .ldt_name = LUSTRE_OSC_NAME,
242 .ldt_ops = &osc_device_type_ops,
243 .ldt_ctx_tags = LCT_CL_THREAD