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.sun.com/software/products/lustre/docs/GPLv2.pdf
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
27 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
39 * Author: Mike Pershin <tappro@whamcloud.com>
40 * Author: Johann Lombardi <johann@whamcloud.com>
43 #define DEBUG_SUBSYSTEM S_FILTER
45 #include <obd_class.h>
46 #include <lustre_param.h>
48 #include "ofd_internal.h"
50 /* Slab for OFD object allocation */
51 static cfs_mem_cache_t *ofd_object_kmem;
53 static struct lu_kmem_descr ofd_caches[] = {
55 .ckd_cache = &ofd_object_kmem,
56 .ckd_name = "ofd_obj",
57 .ckd_size = sizeof(struct ofd_object)
64 static int ofd_stack_init(const struct lu_env *env,
65 struct ofd_device *m, struct lustre_cfg *cfg)
67 struct lu_device *ofd_lu = &m->ofd_dt_dev.dd_lu_dev;
68 const char *dev = lustre_cfg_string(cfg, 0);
69 struct obd_type *type;
70 struct lu_device_type *ldt;
72 struct ofd_thread_info *info = ofd_info(env);
77 /* XXX: we should be able to use different OSDs here */
78 type = class_get_type(LUSTRE_OSD_NAME);
80 CERROR("Unknown type: '%s'\n", LUSTRE_OSD_NAME);
84 rc = lu_env_refill((struct lu_env *)env);
86 CERROR("Failure to refill session: '%d'\n", rc);
92 CERROR("type: '%s'\n", LUSTRE_OSD_NAME);
93 GOTO(out_type, rc = -EINVAL);
96 ldt->ldt_obd_type = type;
97 d = ldt->ldt_ops->ldto_device_alloc(env, ldt, cfg);
99 CERROR("Cannot allocate device: '%s'\n", LUSTRE_OSD_NAME);
100 GOTO(out_type, rc = -ENODEV);
103 LASSERT(ofd_lu->ld_site);
104 d->ld_site = ofd_lu->ld_site;
106 snprintf(info->fti_u.name, sizeof(info->fti_u.name),
107 "%s-osd", lustre_cfg_string(cfg, 0));
110 rc = ldt->ldt_ops->ldto_device_init(env, d, dev, NULL);
112 CERROR("can't init device '%s', rc %d\n", LUSTRE_OSD_NAME, rc);
116 lu_ref_add(&d->ld_reference, "lu-stack", &lu_site_init);
118 m->ofd_osd = lu2dt_dev(d);
120 /* process setup config */
121 rc = d->ld_ops->ldo_process_config(env, d, cfg);
128 ldt->ldt_ops->ldto_device_fini(env, d);
131 ldt->ldt_ops->ldto_device_free(env, d);
133 class_put_type(type);
137 static void ofd_stack_fini(const struct lu_env *env, struct ofd_device *m,
138 struct lu_device *top)
140 struct obd_device *obd = ofd_obd(m);
141 struct lustre_cfg_bufs bufs;
142 struct lustre_cfg *lcfg;
147 lu_site_purge(env, top->ld_site, ~0);
149 /* process cleanup, pass mdt obd name to get obd umount flags */
150 lustre_cfg_bufs_reset(&bufs, obd->obd_name);
155 lustre_cfg_bufs_set_string(&bufs, 1, flags);
156 lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
158 CERROR("Cannot alloc lcfg!\n");
163 top->ld_ops->ldo_process_config(env, top, lcfg);
164 lustre_cfg_free(lcfg);
166 lu_stack_fini(env, &m->ofd_osd->dd_lu_dev);
172 /* used by MGS to process specific configurations */
173 static int ofd_process_config(const struct lu_env *env, struct lu_device *d,
174 struct lustre_cfg *cfg)
176 struct ofd_device *m = ofd_dev(d);
177 struct dt_device *dt_next = m->ofd_osd;
178 struct lu_device *next = &dt_next->dd_lu_dev;
183 switch (cfg->lcfg_command) {
185 struct lprocfs_static_vars lvars;
187 lprocfs_ofd_init_vars(&lvars);
188 rc = class_process_proc_param(PARAM_OST, lvars.obd_vars, cfg,
190 if (rc > 0 || rc == -ENOSYS)
191 /* we don't understand; pass it on */
192 rc = next->ld_ops->ldo_process_config(env, next, cfg);
195 case LCFG_SPTLRPC_CONF: {
200 /* others are passed further */
201 rc = next->ld_ops->ldo_process_config(env, next, cfg);
207 struct lu_object_operations ofd_obj_ops = {
210 static struct lu_object *ofd_object_alloc(const struct lu_env *env,
211 const struct lu_object_header *hdr,
214 struct ofd_object *of;
218 OBD_SLAB_ALLOC_PTR_GFP(of, ofd_object_kmem, CFS_ALLOC_IO);
221 struct lu_object_header *h;
223 o = &of->ofo_obj.do_lu;
225 lu_object_header_init(h);
226 lu_object_init(o, h, d);
227 lu_object_add_top(h, o);
228 o->lo_ops = &ofd_obj_ops;
235 static int ofd_start(const struct lu_env *env, struct lu_device *dev)
237 struct ofd_device *ofd = ofd_dev(dev);
238 struct lu_device *next = &ofd->ofd_osd->dd_lu_dev;
243 /* initialize lower device */
244 rc = next->ld_ops->ldo_prepare(env, dev, next);
249 static int ofd_recovery_complete(const struct lu_env *env,
250 struct lu_device *dev)
252 struct ofd_device *ofd = ofd_dev(dev);
253 struct lu_device *next = &ofd->ofd_osd->dd_lu_dev;
258 rc = next->ld_ops->ldo_recovery_complete(env, next);
262 static struct lu_device_operations ofd_lu_ops = {
263 .ldo_object_alloc = ofd_object_alloc,
264 .ldo_process_config = ofd_process_config,
265 .ldo_recovery_complete = ofd_recovery_complete,
268 extern int ost_handle(struct ptlrpc_request *req);
270 static int ofd_init0(const struct lu_env *env, struct ofd_device *m,
271 struct lu_device_type *ldt, struct lustre_cfg *cfg)
273 const char *dev = lustre_cfg_string(cfg, 0);
274 struct ofd_thread_info *info = NULL;
275 struct obd_device *obd;
280 obd = class_name2obd(dev);
282 CERROR("Cannot find obd with name %s\n", dev);
286 rc = lu_env_refill((struct lu_env *)env);
290 obd->u.obt.obt_magic = OBT_MAGIC;
292 m->ofd_dt_dev.dd_lu_dev.ld_ops = &ofd_lu_ops;
293 m->ofd_dt_dev.dd_lu_dev.ld_obd = obd;
294 /* set this lu_device to obd, because error handling need it */
295 obd->obd_lu_dev = &m->ofd_dt_dev.dd_lu_dev;
297 /* No connection accepted until configurations will finish */
298 obd->obd_no_conn = 1;
299 obd->obd_replayable = 1;
300 if (cfg->lcfg_bufcount > 4 && LUSTRE_CFG_BUFLEN(cfg, 4) > 0) {
301 char *str = lustre_cfg_string(cfg, 4);
303 if (strchr(str, 'n')) {
304 CWARN("%s: recovery disabled\n", obd->obd_name);
305 obd->obd_replayable = 0;
309 info = ofd_info_init(env, NULL);
313 rc = lu_site_init(&m->ofd_site, &m->ofd_dt_dev.dd_lu_dev);
316 m->ofd_site.ls_top_dev = &m->ofd_dt_dev.dd_lu_dev;
318 rc = ofd_stack_init(env, m, cfg);
320 CERROR("Can't init device stack, rc %d\n", rc);
321 GOTO(err_lu_site, rc);
324 dt_conf_get(env, m->ofd_osd, &m->ofd_dt_conf);
326 rc = ofd_start(env, &m->ofd_dt_dev.dd_lu_dev);
328 GOTO(err_fini_stack, rc);
330 rc = lu_site_init_finish(&m->ofd_site);
332 GOTO(err_fini_stack, rc);
337 ofd_stack_fini(env, m, &m->ofd_osd->dd_lu_dev);
339 lu_site_fini(&m->ofd_site);
344 static void ofd_fini(const struct lu_env *env, struct ofd_device *m)
346 struct lu_device *d = &m->ofd_dt_dev.dd_lu_dev;
348 ofd_stack_fini(env, m, m->ofd_site.ls_top_dev);
349 lu_site_fini(&m->ofd_site);
350 LASSERT(cfs_atomic_read(&d->ld_ref) == 0);
354 static struct lu_device *ofd_device_fini(const struct lu_env *env,
358 ofd_fini(env, ofd_dev(d));
362 static struct lu_device *ofd_device_free(const struct lu_env *env,
365 struct ofd_device *m = ofd_dev(d);
367 dt_device_fini(&m->ofd_dt_dev);
372 static struct lu_device *ofd_device_alloc(const struct lu_env *env,
373 struct lu_device_type *t,
374 struct lustre_cfg *cfg)
376 struct ofd_device *m;
382 return ERR_PTR(-ENOMEM);
384 l = &m->ofd_dt_dev.dd_lu_dev;
385 dt_device_init(&m->ofd_dt_dev, t);
386 rc = ofd_init0(env, m, t, cfg);
388 ofd_device_free(env, l);
395 /* thread context key constructor/destructor */
396 LU_KEY_INIT_FINI(ofd, struct ofd_thread_info);
398 static void ofd_key_exit(const struct lu_context *ctx,
399 struct lu_context_key *key, void *data)
401 struct ofd_thread_info *info = data;
403 info->fti_env = NULL;
406 struct lu_context_key ofd_thread_key = {
407 .lct_tags = LCT_DT_THREAD,
408 .lct_init = ofd_key_init,
409 .lct_fini = ofd_key_fini,
410 .lct_exit = ofd_key_exit
413 /* type constructor/destructor: mdt_type_init, mdt_type_fini */
414 LU_TYPE_INIT_FINI(ofd, &ofd_thread_key);
416 static struct lu_device_type_operations ofd_device_type_ops = {
417 .ldto_init = ofd_type_init,
418 .ldto_fini = ofd_type_fini,
420 .ldto_start = ofd_type_start,
421 .ldto_stop = ofd_type_stop,
423 .ldto_device_alloc = ofd_device_alloc,
424 .ldto_device_free = ofd_device_free,
425 .ldto_device_fini = ofd_device_fini
428 static struct lu_device_type ofd_device_type = {
429 .ldt_tags = LU_DEVICE_DT,
430 .ldt_name = LUSTRE_OST_NAME,
431 .ldt_ops = &ofd_device_type_ops,
432 .ldt_ctx_tags = LCT_DT_THREAD
435 int __init ofd_init(void)
437 struct lprocfs_static_vars lvars;
440 rc = lu_kmem_init(ofd_caches);
444 lprocfs_ofd_init_vars(&lvars);
446 rc = class_register_type(&ofd_obd_ops, NULL, lvars.module_vars,
447 LUSTRE_OST_NAME, &ofd_device_type);
451 void __exit ofd_exit(void)
453 class_unregister_type(LUSTRE_OST_NAME);
454 lu_kmem_fini(ofd_caches);
457 MODULE_AUTHOR("Whamcloud, Inc. <http://www.whamcloud.com/>");
458 MODULE_DESCRIPTION("Lustre Object Filtering Device");
459 MODULE_LICENSE("GPL");
461 module_init(ofd_init);
462 module_exit(ofd_exit);