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,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License version 2 for more details. A copy is
14 * included in the COPYING file that accompanied this code.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2013, Intel Corporation.
30 * This file is part of Lustre, http://www.lustre.org/
31 * Lustre is a trademark of Sun Microsystems, Inc.
33 * lustre/lod/lod_dev.c
35 * Lustre Logical Object Device
37 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
38 * Author: Mikhail Pershin <mike.pershin@intel.com>
41 #define DEBUG_SUBSYSTEM S_MDS
43 #include <obd_class.h>
44 #include <md_object.h>
45 #include <lustre_fid.h>
46 #include <lustre_param.h>
47 #include <lustre_update.h>
49 #include "lod_internal.h"
52 * Lookup MDT/OST index \a tgt by FID \a fid.
54 * \param lod LOD to be lookup at.
55 * \param fid FID of object to find MDT/OST.
56 * \param tgt MDT/OST index to return.
57 * \param type indidcate the FID is on MDS or OST.
59 int lod_fld_lookup(const struct lu_env *env, struct lod_device *lod,
60 const struct lu_fid *fid, __u32 *tgt, int *type)
62 struct lu_seq_range range = { 0 };
63 struct lu_server_fld *server_fld;
67 LASSERTF(fid_is_sane(fid), "Invalid FID "DFID"\n", PFID(fid));
69 if (fid_is_idif(fid)) {
70 *tgt = fid_idif_ost_idx(fid);
71 *type = LU_SEQ_RANGE_OST;
75 if (!lod->lod_initialized || (!fid_seq_in_fldb(fid_seq(fid)))) {
76 LASSERT(lu_site2seq(lod2lu_dev(lod)->ld_site) != NULL);
78 *tgt = lu_site2seq(lod2lu_dev(lod)->ld_site)->ss_node_id;
79 *type = LU_SEQ_RANGE_MDT;
83 server_fld = lu_site2seq(lod2lu_dev(lod)->ld_site)->ss_server_fld;
84 fld_range_set_type(&range, *type);
85 rc = fld_server_lookup(env, server_fld, fid_seq(fid), &range);
89 *tgt = range.lsr_index;
90 *type = range.lsr_flags;
92 CDEBUG(D_INFO, "LOD: got tgt %x for sequence: "
93 LPX64"\n", *tgt, fid_seq(fid));
98 extern struct lu_object_operations lod_lu_obj_ops;
99 extern struct dt_object_operations lod_obj_ops;
101 /* Slab for OSD object allocation */
102 struct kmem_cache *lod_object_kmem;
104 static struct lu_kmem_descr lod_caches[] = {
106 .ckd_cache = &lod_object_kmem,
107 .ckd_name = "lod_obj",
108 .ckd_size = sizeof(struct lod_object)
115 static struct lu_device *lod_device_fini(const struct lu_env *env,
116 struct lu_device *d);
118 struct lu_object *lod_object_alloc(const struct lu_env *env,
119 const struct lu_object_header *hdr,
120 struct lu_device *dev)
122 struct lod_object *lod_obj;
123 struct lu_object *lu_obj;
126 OBD_SLAB_ALLOC_PTR_GFP(lod_obj, lod_object_kmem, GFP_NOFS);
128 RETURN(ERR_PTR(-ENOMEM));
130 lu_obj = lod2lu_obj(lod_obj);
131 dt_object_init(&lod_obj->ldo_obj, NULL, dev);
132 lod_obj->ldo_obj.do_ops = &lod_obj_ops;
133 lu_obj->lo_ops = &lod_lu_obj_ops;
138 static int lod_cleanup_desc_tgts(const struct lu_env *env,
139 struct lod_device *lod,
140 struct lod_tgt_descs *ltd,
141 struct lustre_cfg *lcfg)
143 struct lu_device *next;
148 if (ltd->ltd_tgts_size <= 0) {
149 lod_putref(lod, ltd);
152 cfs_foreach_bit(ltd->ltd_tgt_bitmap, i) {
153 struct lod_tgt_desc *tgt;
156 tgt = LTD_TGT(ltd, i);
157 LASSERT(tgt && tgt->ltd_tgt);
158 next = &tgt->ltd_tgt->dd_lu_dev;
159 rc1 = next->ld_ops->ldo_process_config(env, next, lcfg);
161 CERROR("%s: error cleaning up LOD index %u: cmd %#x"
162 ": rc = %d\n", lod2obd(lod)->obd_name, i,
163 lcfg->lcfg_command, rc1);
167 lod_putref(lod, ltd);
171 static int lodname2mdt_index(char *lodname, long *index)
175 /* The lodname suppose to be fsname-MDTxxxx-mdtlov */
176 ptr = strrchr(lodname, '-');
178 CERROR("invalid MDT index in '%s'\n", lodname);
182 if (strncmp(ptr, "-mdtlov", 7) != 0) {
183 CERROR("invalid MDT index in '%s'\n", lodname);
187 if ((unsigned long)ptr - (unsigned long)lodname <= 8) {
188 CERROR("invalid MDT index in '%s'\n", lodname);
192 if (strncmp(ptr - 8, "-MDT", 4) != 0) {
193 CERROR("invalid MDT index in '%s'\n", lodname);
197 *index = simple_strtol(ptr - 4, &tmp, 16);
198 if (*tmp != '-' || *index > INT_MAX || *index < 0) {
199 CERROR("invalid MDT index in '%s'\n", lodname);
206 * Procss config log on LOD
207 * \param env environment info
208 * \param dev lod device
209 * \param lcfg config log
211 * Add osc config log,
212 * marker 20 (flags=0x01, v2.2.49.56) lustre-OST0001 'add osc'
213 * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:nidxxx
214 * attach 0:lustre-OST0001-osc-MDT0001 1:osc 2:lustre-MDT0001-mdtlov_UUID
215 * setup 0:lustre-OST0001-osc-MDT0001 1:lustre-OST0001_UUID 2:nid
216 * lov_modify_tgts add 0:lustre-MDT0001-mdtlov 1:lustre-OST0001_UUID 2:1 3:1
217 * marker 20 (flags=0x02, v2.2.49.56) lustre-OST0001 'add osc'
220 * marker 10 (flags=0x01, v2.2.49.56) lustre-MDT0000 'add osp'
221 * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:nid
222 * attach 0:lustre-MDT0000-osp-MDT0001 1:osp 2:lustre-MDT0001-mdtlov_UUID
223 * setup 0:lustre-MDT0000-osp-MDT0001 1:lustre-MDT0000_UUID 2:nid
224 * modify_mdc_tgts add 0:lustre-MDT0001 1:lustre-MDT0000_UUID 2:0 3:1
225 * marker 10 (flags=0x02, v2.2.49.56) lustre-MDT0000_UUID 'add osp'
227 static int lod_process_config(const struct lu_env *env,
228 struct lu_device *dev,
229 struct lustre_cfg *lcfg)
231 struct lod_device *lod = lu2lod_dev(dev);
232 struct lu_device *next = &lod->lod_child->dd_lu_dev;
237 switch(lcfg->lcfg_command) {
238 case LCFG_LOV_DEL_OBD:
239 case LCFG_LOV_ADD_INA:
240 case LCFG_LOV_ADD_OBD:
245 /* lov_modify_tgts add 0:lov_mdsA 1:osp 2:0 3:1
246 * modify_mdc_tgts add 0:lustre-MDT0001
247 * 1:lustre-MDT0001-mdc0002
249 arg1 = lustre_cfg_string(lcfg, 1);
251 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
252 GOTO(out, rc = -EINVAL);
253 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
254 GOTO(out, rc = -EINVAL);
256 if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD) {
258 mdt = strstr(lustre_cfg_string(lcfg, 0), "-MDT");
259 /* 1.8 configs don't have "-MDT0000" at the end */
264 rc = lodname2mdt_index(
265 lustre_cfg_string(lcfg, 0),
269 mdt_index = long_index;
271 rc = lod_add_device(env, lod, arg1, index, gen,
272 mdt_index, LUSTRE_OSC_NAME, 1);
273 } else if (lcfg->lcfg_command == LCFG_ADD_MDC) {
275 rc = lod_add_device(env, lod, arg1, index, gen,
276 mdt_index, LUSTRE_MDC_NAME, 1);
277 } else if (lcfg->lcfg_command == LCFG_LOV_ADD_INA) {
278 /*FIXME: Add mdt_index for LCFG_LOV_ADD_INA*/
280 rc = lod_add_device(env, lod, arg1, index, gen,
281 mdt_index, LUSTRE_OSC_NAME, 0);
283 rc = lod_del_device(env, lod,
285 arg1, index, gen, true);
292 struct obd_device *obd = lod2obd(lod);
294 rc = class_process_proc_seq_param(PARAM_LOV, obd->obd_vars,
301 case LCFG_PRE_CLEANUP: {
302 lu_dev_del_linkage(dev->ld_site, dev);
303 lod_cleanup_desc_tgts(env, lod, &lod->lod_mdt_descs, lcfg);
304 lod_cleanup_desc_tgts(env, lod, &lod->lod_ost_descs, lcfg);
305 if (lcfg->lcfg_command == LCFG_PRE_CLEANUP)
308 * do cleanup on underlying storage only when
309 * all OSPs are cleaned up, as they use that OSD as well
311 next = &lod->lod_child->dd_lu_dev;
312 rc = next->ld_ops->ldo_process_config(env, next, lcfg);
314 CERROR("%s: can't process %u: %d\n",
315 lod2obd(lod)->obd_name, lcfg->lcfg_command, rc);
317 rc = obd_disconnect(lod->lod_child_exp);
319 CERROR("error in disconnect from storage: %d\n", rc);
323 CERROR("%s: unknown command %u\n", lod2obd(lod)->obd_name,
333 static int lod_recovery_complete(const struct lu_env *env,
334 struct lu_device *dev)
336 struct lod_device *lod = lu2lod_dev(dev);
337 struct lu_device *next = &lod->lod_child->dd_lu_dev;
341 LASSERT(lod->lod_recovery_completed == 0);
342 lod->lod_recovery_completed = 1;
344 rc = next->ld_ops->ldo_recovery_complete(env, next);
346 lod_getref(&lod->lod_ost_descs);
347 if (lod->lod_osts_size > 0) {
348 cfs_foreach_bit(lod->lod_ost_bitmap, i) {
349 struct lod_tgt_desc *tgt;
350 tgt = OST_TGT(lod, i);
351 LASSERT(tgt && tgt->ltd_tgt);
352 next = &tgt->ltd_ost->dd_lu_dev;
353 rc = next->ld_ops->ldo_recovery_complete(env, next);
355 CERROR("%s: can't complete recovery on #%d:"
356 "%d\n", lod2obd(lod)->obd_name, i, rc);
359 lod_putref(lod, &lod->lod_ost_descs);
363 static int lod_prepare(const struct lu_env *env, struct lu_device *pdev,
364 struct lu_device *cdev)
366 struct lod_device *lod = lu2lod_dev(cdev);
367 struct lu_device *next = &lod->lod_child->dd_lu_dev;
371 rc = next->ld_ops->ldo_prepare(env, pdev, next);
373 CERROR("%s: prepare bottom error: rc = %d\n",
374 lod2obd(lod)->obd_name, rc);
378 lod->lod_initialized = 1;
383 const struct lu_device_operations lod_lu_ops = {
384 .ldo_object_alloc = lod_object_alloc,
385 .ldo_process_config = lod_process_config,
386 .ldo_recovery_complete = lod_recovery_complete,
387 .ldo_prepare = lod_prepare,
390 static int lod_root_get(const struct lu_env *env,
391 struct dt_device *dev, struct lu_fid *f)
393 return dt_root_get(env, dt2lod_dev(dev)->lod_child, f);
396 static int lod_statfs(const struct lu_env *env,
397 struct dt_device *dev, struct obd_statfs *sfs)
399 return dt_statfs(env, dt2lod_dev(dev)->lod_child, sfs);
402 static struct thandle *lod_trans_create(const struct lu_env *env,
403 struct dt_device *dev)
407 th = dt_trans_create(env, dt2lod_dev(dev)->lod_child);
414 static int lod_trans_start(const struct lu_env *env, struct dt_device *dev,
417 struct lod_device *lod = dt2lod_dev((struct dt_device *) dev);
420 if (unlikely(th->th_update != NULL)) {
421 struct thandle_update *tu = th->th_update;
422 struct dt_update_request *update;
424 list_for_each_entry(update, &tu->tu_remote_update_list,
426 LASSERT(update->dur_dt != NULL);
427 rc = dt_trans_start(env, update->dur_dt, th);
432 return dt_trans_start(env, lod->lod_child, th);
435 static int lod_trans_stop(const struct lu_env *env, struct dt_device *dt,
438 struct thandle_update *tu = th->th_update;
439 struct dt_update_request *update;
440 struct dt_update_request *tmp;
445 rc = dt_trans_stop(env, th->th_dev, th);
446 if (likely(tu == NULL))
449 list_for_each_entry_safe(update, tmp,
450 &tu->tu_remote_update_list,
452 /* update will be freed inside dt_trans_stop */
453 rc2 = dt_trans_stop(env, update->dur_dt, th);
454 if (unlikely(rc2 != 0 && rc == 0))
461 static void lod_conf_get(const struct lu_env *env,
462 const struct dt_device *dev,
463 struct dt_device_param *param)
465 dt_conf_get(env, dt2lod_dev((struct dt_device *)dev)->lod_child, param);
468 static int lod_sync(const struct lu_env *env, struct dt_device *dev)
470 struct lod_device *lod = dt2lod_dev(dev);
471 struct lod_ost_desc *ost;
475 lod_getref(&lod->lod_ost_descs);
476 lod_foreach_ost(lod, i) {
477 ost = OST_TGT(lod, i);
478 LASSERT(ost && ost->ltd_ost);
479 rc = dt_sync(env, ost->ltd_ost);
481 CERROR("%s: can't sync %u: %d\n",
482 lod2obd(lod)->obd_name, i, rc);
486 lod_putref(lod, &lod->lod_ost_descs);
488 rc = dt_sync(env, lod->lod_child);
493 static int lod_ro(const struct lu_env *env, struct dt_device *dev)
495 return dt_ro(env, dt2lod_dev(dev)->lod_child);
498 static int lod_commit_async(const struct lu_env *env, struct dt_device *dev)
500 return dt_commit_async(env, dt2lod_dev(dev)->lod_child);
503 static int lod_init_capa_ctxt(const struct lu_env *env, struct dt_device *dev,
504 int mode, unsigned long timeout,
505 __u32 alg, struct lustre_capa_key *keys)
507 struct dt_device *next = dt2lod_dev(dev)->lod_child;
508 return dt_init_capa_ctxt(env, next, mode, timeout, alg, keys);
511 static const struct dt_device_operations lod_dt_ops = {
512 .dt_root_get = lod_root_get,
513 .dt_statfs = lod_statfs,
514 .dt_trans_create = lod_trans_create,
515 .dt_trans_start = lod_trans_start,
516 .dt_trans_stop = lod_trans_stop,
517 .dt_conf_get = lod_conf_get,
520 .dt_commit_async = lod_commit_async,
521 .dt_init_capa_ctxt = lod_init_capa_ctxt,
524 static int lod_connect_to_osd(const struct lu_env *env, struct lod_device *lod,
525 struct lustre_cfg *cfg)
527 struct obd_connect_data *data = NULL;
528 struct obd_device *obd;
529 char *nextdev = NULL, *p, *s;
534 LASSERT(lod->lod_child_exp == NULL);
536 /* compatibility hack: we still use old config logs
537 * which specify LOV, but we need to learn underlying
538 * OSD device, which is supposed to be:
539 * <fsname>-MDTxxxx-osd
541 * 2.x MGS generates lines like the following:
542 * #03 (176)lov_setup 0:lustre-MDT0000-mdtlov 1:(struct lov_desc)
543 * 1.8 MGS generates lines like the following:
544 * #03 (168)lov_setup 0:lustre-mdtlov 1:(struct lov_desc)
546 * we use "-MDT" to differentiate 2.x from 1.8 */
548 if ((p = lustre_cfg_string(cfg, 0)) && strstr(p, "-mdtlov")) {
550 OBD_ALLOC(nextdev, len);
552 GOTO(out, rc = -ENOMEM);
555 s = strstr(nextdev, "-mdtlov");
556 if (unlikely(s == NULL)) {
557 CERROR("unable to parse device name %s\n",
558 lustre_cfg_string(cfg, 0));
559 GOTO(out, rc = -EINVAL);
562 if (strstr(nextdev, "-MDT")) {
567 strcpy(s, "-MDT0000-osd");
570 CERROR("unable to parse device name %s\n",
571 lustre_cfg_string(cfg, 0));
572 GOTO(out, rc = -EINVAL);
577 GOTO(out, rc = -ENOMEM);
579 obd = class_name2obd(nextdev);
581 CERROR("can not locate next device: %s\n", nextdev);
582 GOTO(out, rc = -ENOTCONN);
585 data->ocd_connect_flags = OBD_CONNECT_VERSION;
586 data->ocd_version = LUSTRE_VERSION_CODE;
588 rc = obd_connect(env, &lod->lod_child_exp, obd, &obd->obd_uuid,
591 CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
595 lod->lod_dt_dev.dd_lu_dev.ld_site =
596 lod->lod_child_exp->exp_obd->obd_lu_dev->ld_site;
597 LASSERT(lod->lod_dt_dev.dd_lu_dev.ld_site);
598 lod->lod_child = lu2dt_dev(lod->lod_child_exp->exp_obd->obd_lu_dev);
604 OBD_FREE(nextdev, len);
608 static int lod_tgt_desc_init(struct lod_tgt_descs *ltd)
610 mutex_init(<d->ltd_mutex);
611 init_rwsem(<d->ltd_rw_sem);
613 /* the OST array and bitmap are allocated/grown dynamically as OSTs are
614 * added to the LOD, see lod_add_device() */
615 ltd->ltd_tgt_bitmap = CFS_ALLOCATE_BITMAP(32);
616 if (ltd->ltd_tgt_bitmap == NULL)
619 ltd->ltd_tgts_size = 32;
622 ltd->ltd_death_row = 0;
623 ltd->ltd_refcount = 0;
627 static int lod_init0(const struct lu_env *env, struct lod_device *lod,
628 struct lu_device_type *ldt, struct lustre_cfg *cfg)
630 struct dt_device_param ddp;
631 struct obd_device *obd;
635 obd = class_name2obd(lustre_cfg_string(cfg, 0));
637 CERROR("Cannot find obd with name %s\n",
638 lustre_cfg_string(cfg, 0));
642 obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev;
643 lod->lod_dt_dev.dd_lu_dev.ld_obd = obd;
644 lod->lod_dt_dev.dd_lu_dev.ld_ops = &lod_lu_ops;
645 lod->lod_dt_dev.dd_ops = &lod_dt_ops;
647 rc = lod_connect_to_osd(env, lod, cfg);
651 dt_conf_get(env, &lod->lod_dt_dev, &ddp);
652 lod->lod_osd_max_easize = ddp.ddp_max_ea_size;
654 /* setup obd to be used with old lov code */
655 rc = lod_pools_init(lod, cfg);
657 GOTO(out_disconnect, rc);
659 rc = lod_procfs_init(lod);
663 spin_lock_init(&lod->lod_desc_lock);
664 spin_lock_init(&lod->lod_connects_lock);
665 lod_tgt_desc_init(&lod->lod_mdt_descs);
666 lod_tgt_desc_init(&lod->lod_ost_descs);
673 obd_disconnect(lod->lod_child_exp);
677 static struct lu_device *lod_device_free(const struct lu_env *env,
678 struct lu_device *lu)
680 struct lod_device *lod = lu2lod_dev(lu);
681 struct lu_device *next = &lod->lod_child->dd_lu_dev;
684 LASSERT(atomic_read(&lu->ld_ref) == 0);
685 dt_device_fini(&lod->lod_dt_dev);
690 static struct lu_device *lod_device_alloc(const struct lu_env *env,
691 struct lu_device_type *type,
692 struct lustre_cfg *lcfg)
694 struct lod_device *lod;
695 struct lu_device *lu_dev;
699 lu_dev = ERR_PTR(-ENOMEM);
703 lu_dev = lod2lu_dev(lod);
704 dt_device_init(&lod->lod_dt_dev, type);
705 rc = lod_init0(env, lod, type, lcfg);
707 lod_device_free(env, lu_dev);
708 lu_dev = ERR_PTR(rc);
715 static struct lu_device *lod_device_fini(const struct lu_env *env,
718 struct lod_device *lod = lu2lod_dev(d);
724 lod_procfs_fini(lod);
726 rc = lod_fini_tgt(env, lod, &lod->lod_ost_descs, true);
728 CERROR("%s:can not fini ost descs %d\n",
729 lod2obd(lod)->obd_name, rc);
731 rc = lod_fini_tgt(env, lod, &lod->lod_mdt_descs, false);
733 CERROR("%s:can not fini mdt descs %d\n",
734 lod2obd(lod)->obd_name, rc);
740 * we use exports to track all LOD users
742 static int lod_obd_connect(const struct lu_env *env, struct obd_export **exp,
743 struct obd_device *obd, struct obd_uuid *cluuid,
744 struct obd_connect_data *data, void *localdata)
746 struct lod_device *lod = lu2lod_dev(obd->obd_lu_dev);
747 struct lustre_handle conn;
751 CDEBUG(D_CONFIG, "connect #%d\n", lod->lod_connects);
753 rc = class_connect(&conn, obd, cluuid);
757 *exp = class_conn2export(&conn);
759 spin_lock(&lod->lod_connects_lock);
761 /* at the moment we expect the only user */
762 LASSERT(lod->lod_connects == 1);
763 spin_unlock(&lod->lod_connects_lock);
769 * once last export (we don't count self-export) disappeared
770 * lod can be released
772 static int lod_obd_disconnect(struct obd_export *exp)
774 struct obd_device *obd = exp->exp_obd;
775 struct lod_device *lod = lu2lod_dev(obd->obd_lu_dev);
779 /* Only disconnect the underlying layers on the final disconnect. */
780 spin_lock(&lod->lod_connects_lock);
782 if (lod->lod_connects != 0) {
783 /* why should there be more than 1 connect? */
784 spin_unlock(&lod->lod_connects_lock);
785 CERROR("%s: disconnect #%d\n", exp->exp_obd->obd_name,
789 spin_unlock(&lod->lod_connects_lock);
791 /* the last user of lod has gone, let's release the device */
795 rc = class_disconnect(exp); /* bz 9811 */
797 if (rc == 0 && release)
798 class_manual_cleanup(obd);
802 LU_KEY_INIT(lod, struct lod_thread_info);
804 static void lod_key_fini(const struct lu_context *ctx,
805 struct lu_context_key *key, void *data)
807 struct lod_thread_info *info = data;
808 /* allocated in lod_get_lov_ea
809 * XXX: this is overload, a tread may have such store but used only
810 * once. Probably better would be pool of such stores per LOD.
812 if (info->lti_ea_store) {
813 OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
814 info->lti_ea_store = NULL;
815 info->lti_ea_store_size = 0;
817 lu_buf_free(&info->lti_linkea_buf);
821 /* context key: lod_thread_key */
822 LU_CONTEXT_KEY_DEFINE(lod, LCT_MD_THREAD);
824 LU_TYPE_INIT_FINI(lod, &lod_thread_key);
826 static struct lu_device_type_operations lod_device_type_ops = {
827 .ldto_init = lod_type_init,
828 .ldto_fini = lod_type_fini,
830 .ldto_start = lod_type_start,
831 .ldto_stop = lod_type_stop,
833 .ldto_device_alloc = lod_device_alloc,
834 .ldto_device_free = lod_device_free,
836 .ldto_device_fini = lod_device_fini
839 static struct lu_device_type lod_device_type = {
840 .ldt_tags = LU_DEVICE_DT,
841 .ldt_name = LUSTRE_LOD_NAME,
842 .ldt_ops = &lod_device_type_ops,
843 .ldt_ctx_tags = LCT_MD_THREAD,
846 static int lod_obd_get_info(const struct lu_env *env, struct obd_export *exp,
847 __u32 keylen, void *key, __u32 *vallen, void *val,
848 struct lov_stripe_md *lsm)
852 if (KEY_IS(KEY_OSP_CONNECTED)) {
853 struct obd_device *obd = exp->exp_obd;
854 struct lod_device *d;
855 struct lod_ost_desc *ost;
858 if (!obd->obd_set_up || obd->obd_stopping)
861 d = lu2lod_dev(obd->obd_lu_dev);
862 lod_getref(&d->lod_ost_descs);
863 lod_foreach_ost(d, i) {
865 LASSERT(ost && ost->ltd_ost);
867 rc = obd_get_info(env, ost->ltd_exp, keylen, key,
869 /* one healthy device is enough */
873 lod_putref(d, &d->lod_ost_descs);
880 static struct obd_ops lod_obd_device_ops = {
881 .o_owner = THIS_MODULE,
882 .o_connect = lod_obd_connect,
883 .o_disconnect = lod_obd_disconnect,
884 .o_get_info = lod_obd_get_info,
885 .o_pool_new = lod_pool_new,
886 .o_pool_rem = lod_pool_remove,
887 .o_pool_add = lod_pool_add,
888 .o_pool_del = lod_pool_del,
891 static int __init lod_mod_init(void)
893 struct obd_type *type;
896 rc = lu_kmem_init(lod_caches);
900 rc = class_register_type(&lod_obd_device_ops, NULL, true, NULL,
901 #ifndef HAVE_ONLY_PROCFS_SEQ
904 LUSTRE_LOD_NAME, &lod_device_type);
906 lu_kmem_fini(lod_caches);
910 /* create "lov" entry in procfs for compatibility purposes */
911 type = class_search_type(LUSTRE_LOV_NAME);
912 if (type != NULL && type->typ_procroot != NULL)
915 type = class_search_type(LUSTRE_LOD_NAME);
916 type->typ_procsym = lprocfs_seq_register("lov", proc_lustre_root,
918 if (IS_ERR(type->typ_procsym)) {
919 CERROR("lod: can't create compat entry \"lov\": %d\n",
920 (int)PTR_ERR(type->typ_procsym));
921 type->typ_procsym = NULL;
926 static void __exit lod_mod_exit(void)
928 class_unregister_type(LUSTRE_LOD_NAME);
929 lu_kmem_fini(lod_caches);
932 MODULE_AUTHOR("Whamcloud, Inc. <http://www.whamcloud.com/>");
933 MODULE_DESCRIPTION("Lustre Logical Object Device ("LUSTRE_LOD_NAME")");
934 MODULE_LICENSE("GPL");
936 module_init(lod_mod_init);
937 module_exit(lod_mod_exit);