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, 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>
42 # define EXPORT_SYMTAB
44 #define DEBUG_SUBSYSTEM S_MDS
46 #include <obd_class.h>
47 #include <lustre_param.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 flags 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 flags)
62 struct lu_seq_range range;
63 struct lu_server_fld *server_fld;
67 LASSERTF(fid_is_sane(fid), "Invalid FID "DFID"\n", PFID(fid));
68 if (fid_is_idif(fid)) {
69 *tgt = fid_idif_ost_idx(fid);
73 if (!lod->lod_initialized || !fid_is_norm(fid)) {
74 LASSERT(lu_site2seq(lod2lu_dev(lod)->ld_site) != NULL);
75 *tgt = lu_site2seq(lod2lu_dev(lod)->ld_site)->ss_node_id;
79 server_fld = lu_site2seq(lod2lu_dev(lod)->ld_site)->ss_server_fld;
80 range.lsr_flags = flags;
81 rc = fld_server_lookup(env, server_fld, fid_seq(fid), &range);
83 CERROR("%s: Can't find tgt by seq "LPX64", rc %d\n",
84 lod2obd(lod)->obd_name, fid_seq(fid), rc);
88 *tgt = range.lsr_index;
90 CDEBUG(D_INFO, "LOD: got tgt %x for sequence: "
91 LPX64"\n", *tgt, fid_seq(fid));
96 extern struct lu_object_operations lod_lu_obj_ops;
97 extern struct dt_object_operations lod_obj_ops;
99 /* Slab for OSD object allocation */
100 cfs_mem_cache_t *lod_object_kmem;
102 static struct lu_kmem_descr lod_caches[] = {
104 .ckd_cache = &lod_object_kmem,
105 .ckd_name = "lod_obj",
106 .ckd_size = sizeof(struct lod_object)
113 static struct lu_device *lod_device_fini(const struct lu_env *env,
114 struct lu_device *d);
116 struct lu_object *lod_object_alloc(const struct lu_env *env,
117 const struct lu_object_header *hdr,
118 struct lu_device *dev)
120 struct lu_object *lu_obj;
121 struct lod_object *lo;
123 OBD_SLAB_ALLOC_PTR_GFP(lo, lod_object_kmem, CFS_ALLOC_IO);
127 lu_obj = lod2lu_obj(lo);
128 dt_object_init(&lo->ldo_obj, NULL, dev);
129 lo->ldo_obj.do_ops = &lod_obj_ops;
130 lu_obj->lo_ops = &lod_lu_obj_ops;
135 static int lod_cleanup_desc_tgts(const struct lu_env *env,
136 struct lod_device *lod,
137 struct lod_tgt_descs *ltd,
138 struct lustre_cfg *lcfg)
140 struct lu_device *next;
145 if (ltd->ltd_tgts_size <= 0) {
146 lod_putref(lod, ltd);
149 cfs_foreach_bit(ltd->ltd_tgt_bitmap, i) {
150 struct lod_tgt_desc *tgt;
153 tgt = LTD_TGT(ltd, i);
154 LASSERT(tgt && tgt->ltd_tgt);
155 next = &tgt->ltd_tgt->dd_lu_dev;
156 rc1 = next->ld_ops->ldo_process_config(env, next, lcfg);
158 CERROR("%s: error cleaning up LOD index %u: cmd %#x"
159 ": rc = %d\n", lod2obd(lod)->obd_name, i,
160 lcfg->lcfg_command, rc1);
164 lod_putref(lod, ltd);
168 static int lodname2mdt_index(char *lodname, int *index)
172 /* The lodname suppose to be fsname-MDTxxxx-mdtlov */
173 ptr = strrchr(lodname, '-');
175 CERROR("invalid MDT index in '%s'\n", lodname);
179 if (strncmp(ptr, "-mdtlov", 7) != 0) {
180 CERROR("invalid MDT index in '%s'\n", lodname);
184 if ((unsigned long)ptr - (unsigned long)lodname <= 8) {
185 CERROR("invalid MDT index in '%s'\n", lodname);
189 if (strncmp(ptr - 8, "-MDT", 4) != 0) {
190 CERROR("invalid MDT index in '%s'\n", lodname);
194 *index = simple_strtol(ptr - 4, &tmp, 16);
195 if (*tmp != '-' || *index > INT_MAX || *index < 0) {
196 CERROR("invalid MDT index in '%s'\n", lodname);
202 static int lod_process_config(const struct lu_env *env,
203 struct lu_device *dev,
204 struct lustre_cfg *lcfg)
206 struct lod_device *lod = lu2lod_dev(dev);
207 struct lu_device *next = &lod->lod_child->dd_lu_dev;
212 switch(lcfg->lcfg_command) {
213 case LCFG_LOV_DEL_OBD:
214 case LCFG_LOV_ADD_INA:
215 case LCFG_LOV_ADD_OBD:
220 /* lov_modify_tgts add 0:lov_mdsA 1:osp 2:0 3:1
221 * modify_mdc_tgts add 0:lustre-MDT0001
222 * 1:lustre-MDT0001-mdc0002
224 arg1 = lustre_cfg_string(lcfg, 1);
226 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
227 GOTO(out, rc = -EINVAL);
228 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
229 GOTO(out, rc = -EINVAL);
231 if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD) {
233 mdt = strstr(lustre_cfg_string(lcfg, 0), "-MDT");
234 /* 1.8 configs don't have "-MDT0000" at the end */
238 rc = lodname2mdt_index(
239 lustre_cfg_string(lcfg, 0), &mdt_index);
243 rc = lod_add_device(env, lod, arg1, index, gen,
244 mdt_index, LUSTRE_OSC_NAME, 1);
245 } else if (lcfg->lcfg_command == LCFG_ADD_MDC) {
247 rc = lod_add_device(env, lod, arg1, index, gen,
248 mdt_index, LUSTRE_MDC_NAME, 1);
249 } else if (lcfg->lcfg_command == LCFG_LOV_ADD_INA) {
250 /*FIXME: Add mdt_index for LCFG_LOV_ADD_INA*/
252 rc = lod_add_device(env, lod, arg1, index, gen,
253 mdt_index, LUSTRE_OSC_NAME, 0);
255 rc = lod_del_device(env, lod,
264 struct lprocfs_static_vars v = { 0 };
265 struct obd_device *obd = lod2obd(lod);
267 lprocfs_lod_init_vars(&v);
269 rc = class_process_proc_param(PARAM_LOV, v.obd_vars, lcfg, obd);
275 lu_dev_del_linkage(dev->ld_site, dev);
276 lod_cleanup_desc_tgts(env, lod, &lod->lod_mdt_descs, lcfg);
277 lod_cleanup_desc_tgts(env, lod, &lod->lod_ost_descs, lcfg);
279 * do cleanup on underlying storage only when
280 * all OSPs are cleaned up, as they use that OSD as well
282 next = &lod->lod_child->dd_lu_dev;
283 rc = next->ld_ops->ldo_process_config(env, next, lcfg);
285 CERROR("%s: can't process %u: %d\n",
286 lod2obd(lod)->obd_name, lcfg->lcfg_command, rc);
288 rc = obd_disconnect(lod->lod_child_exp);
290 CERROR("error in disconnect from storage: %d\n", rc);
294 CERROR("%s: unknown command %u\n", lod2obd(lod)->obd_name,
304 static int lod_recovery_complete(const struct lu_env *env,
305 struct lu_device *dev)
307 struct lod_device *lod = lu2lod_dev(dev);
308 struct lu_device *next = &lod->lod_child->dd_lu_dev;
312 LASSERT(lod->lod_recovery_completed == 0);
313 lod->lod_recovery_completed = 1;
315 rc = next->ld_ops->ldo_recovery_complete(env, next);
317 lod_getref(&lod->lod_ost_descs);
318 if (lod->lod_osts_size > 0) {
319 cfs_foreach_bit(lod->lod_ost_bitmap, i) {
320 struct lod_tgt_desc *tgt;
321 tgt = OST_TGT(lod, i);
322 LASSERT(tgt && tgt->ltd_tgt);
323 next = &tgt->ltd_ost->dd_lu_dev;
324 rc = next->ld_ops->ldo_recovery_complete(env, next);
326 CERROR("%s: can't complete recovery on #%d:"
327 "%d\n", lod2obd(lod)->obd_name, i, rc);
330 lod_putref(lod, &lod->lod_ost_descs);
334 static int lod_prepare(const struct lu_env *env, struct lu_device *pdev,
335 struct lu_device *cdev)
337 struct lod_device *lod = lu2lod_dev(cdev);
338 struct lu_device *next = &lod->lod_child->dd_lu_dev;
342 rc = next->ld_ops->ldo_prepare(env, pdev, next);
344 CERROR("%s: prepare bottom error: rc = %d\n",
345 lod2obd(lod)->obd_name, rc);
349 lod->lod_initialized = 1;
354 const struct lu_device_operations lod_lu_ops = {
355 .ldo_object_alloc = lod_object_alloc,
356 .ldo_process_config = lod_process_config,
357 .ldo_recovery_complete = lod_recovery_complete,
358 .ldo_prepare = lod_prepare,
361 static int lod_root_get(const struct lu_env *env,
362 struct dt_device *dev, struct lu_fid *f)
364 return dt_root_get(env, dt2lod_dev(dev)->lod_child, f);
367 static int lod_statfs(const struct lu_env *env,
368 struct dt_device *dev, struct obd_statfs *sfs)
370 return dt_statfs(env, dt2lod_dev(dev)->lod_child, sfs);
373 static struct thandle *lod_trans_create(const struct lu_env *env,
374 struct dt_device *dev)
376 return dt_trans_create(env, dt2lod_dev(dev)->lod_child);
379 static int lod_trans_start(const struct lu_env *env, struct dt_device *dev,
382 return dt_trans_start(env, dt2lod_dev(dev)->lod_child, th);
385 static int lod_trans_stop(const struct lu_env *env, struct thandle *th)
387 /* XXX: we don't know next device, will be fixed with DNE */
388 return dt_trans_stop(env, th->th_dev, th);
391 static void lod_conf_get(const struct lu_env *env,
392 const struct dt_device *dev,
393 struct dt_device_param *param)
395 dt_conf_get(env, dt2lod_dev((struct dt_device *)dev)->lod_child, param);
398 static int lod_sync(const struct lu_env *env, struct dt_device *dev)
400 struct lod_device *lod = dt2lod_dev(dev);
401 struct lod_ost_desc *ost;
405 lod_getref(&lod->lod_ost_descs);
406 lod_foreach_ost(lod, i) {
407 ost = OST_TGT(lod, i);
408 LASSERT(ost && ost->ltd_ost);
409 rc = dt_sync(env, ost->ltd_ost);
411 CERROR("%s: can't sync %u: %d\n",
412 lod2obd(lod)->obd_name, i, rc);
416 lod_putref(lod, &lod->lod_ost_descs);
418 rc = dt_sync(env, lod->lod_child);
423 static int lod_ro(const struct lu_env *env, struct dt_device *dev)
425 return dt_ro(env, dt2lod_dev(dev)->lod_child);
428 static int lod_commit_async(const struct lu_env *env, struct dt_device *dev)
430 return dt_commit_async(env, dt2lod_dev(dev)->lod_child);
433 static int lod_init_capa_ctxt(const struct lu_env *env, struct dt_device *dev,
434 int mode, unsigned long timeout,
435 __u32 alg, struct lustre_capa_key *keys)
437 struct dt_device *next = dt2lod_dev(dev)->lod_child;
438 return dt_init_capa_ctxt(env, next, mode, timeout, alg, keys);
441 static const struct dt_device_operations lod_dt_ops = {
442 .dt_root_get = lod_root_get,
443 .dt_statfs = lod_statfs,
444 .dt_trans_create = lod_trans_create,
445 .dt_trans_start = lod_trans_start,
446 .dt_trans_stop = lod_trans_stop,
447 .dt_conf_get = lod_conf_get,
450 .dt_commit_async = lod_commit_async,
451 .dt_init_capa_ctxt = lod_init_capa_ctxt,
454 static int lod_connect_to_osd(const struct lu_env *env, struct lod_device *lod,
455 struct lustre_cfg *cfg)
457 struct obd_connect_data *data = NULL;
458 struct obd_device *obd;
459 char *nextdev = NULL, *p, *s;
464 LASSERT(lod->lod_child_exp == NULL);
466 /* compatibility hack: we still use old config logs
467 * which specify LOV, but we need to learn underlying
468 * OSD device, which is supposed to be:
469 * <fsname>-MDTxxxx-osd
471 * 2.x MGS generates lines like the following:
472 * #03 (176)lov_setup 0:lustre-MDT0000-mdtlov 1:(struct lov_desc)
473 * 1.8 MGS generates lines like the following:
474 * #03 (168)lov_setup 0:lustre-mdtlov 1:(struct lov_desc)
476 * we use "-MDT" to differentiate 2.x from 1.8 */
478 if ((p = lustre_cfg_string(cfg, 0)) && strstr(p, "-mdtlov")) {
480 OBD_ALLOC(nextdev, len);
482 GOTO(out, rc = -ENOMEM);
485 s = strstr(nextdev, "-mdtlov");
486 if (unlikely(s == NULL)) {
487 CERROR("unable to parse device name %s\n",
488 lustre_cfg_string(cfg, 0));
489 GOTO(out, rc = -EINVAL);
492 if (strstr(nextdev, "-MDT")) {
497 strcpy(s, "-MDT0000-osd");
500 CERROR("unable to parse device name %s\n",
501 lustre_cfg_string(cfg, 0));
502 GOTO(out, rc = -EINVAL);
507 GOTO(out, rc = -ENOMEM);
509 obd = class_name2obd(nextdev);
511 CERROR("can not locate next device: %s\n", nextdev);
512 GOTO(out, rc = -ENOTCONN);
515 data->ocd_connect_flags = OBD_CONNECT_VERSION;
516 data->ocd_version = LUSTRE_VERSION_CODE;
518 rc = obd_connect(env, &lod->lod_child_exp, obd, &obd->obd_uuid,
521 CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
525 lod->lod_dt_dev.dd_lu_dev.ld_site =
526 lod->lod_child_exp->exp_obd->obd_lu_dev->ld_site;
527 LASSERT(lod->lod_dt_dev.dd_lu_dev.ld_site);
528 lod->lod_child = lu2dt_dev(lod->lod_child_exp->exp_obd->obd_lu_dev);
534 OBD_FREE(nextdev, len);
538 static int lod_tgt_desc_init(struct lod_tgt_descs *ltd)
540 mutex_init(<d->ltd_mutex);
541 init_rwsem(<d->ltd_rw_sem);
543 /* the OST array and bitmap are allocated/grown dynamically as OSTs are
544 * added to the LOD, see lod_add_device() */
545 ltd->ltd_tgt_bitmap = CFS_ALLOCATE_BITMAP(32);
546 if (ltd->ltd_tgt_bitmap == NULL)
549 ltd->ltd_tgts_size = 32;
552 ltd->ltd_death_row = 0;
553 ltd->ltd_refcount = 0;
557 static int lod_init0(const struct lu_env *env, struct lod_device *lod,
558 struct lu_device_type *ldt, struct lustre_cfg *cfg)
560 struct dt_device_param ddp;
561 struct obd_device *obd;
565 obd = class_name2obd(lustre_cfg_string(cfg, 0));
567 CERROR("Cannot find obd with name %s\n",
568 lustre_cfg_string(cfg, 0));
572 obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev;
573 lod->lod_dt_dev.dd_lu_dev.ld_obd = obd;
574 lod->lod_dt_dev.dd_lu_dev.ld_ops = &lod_lu_ops;
575 lod->lod_dt_dev.dd_ops = &lod_dt_ops;
577 rc = lod_connect_to_osd(env, lod, cfg);
581 dt_conf_get(env, &lod->lod_dt_dev, &ddp);
582 lod->lod_osd_max_easize = ddp.ddp_max_ea_size;
584 /* setup obd to be used with old lov code */
585 rc = lod_pools_init(lod, cfg);
587 GOTO(out_disconnect, rc);
589 rc = lod_procfs_init(lod);
593 spin_lock_init(&lod->lod_desc_lock);
594 spin_lock_init(&lod->lod_connects_lock);
595 lod_tgt_desc_init(&lod->lod_mdt_descs);
596 lod_tgt_desc_init(&lod->lod_ost_descs);
603 obd_disconnect(lod->lod_child_exp);
607 static struct lu_device *lod_device_free(const struct lu_env *env,
608 struct lu_device *lu)
610 struct lod_device *lod = lu2lod_dev(lu);
611 struct lu_device *next = &lod->lod_child->dd_lu_dev;
614 LASSERT(cfs_atomic_read(&lu->ld_ref) == 0);
615 dt_device_fini(&lod->lod_dt_dev);
620 static struct lu_device *lod_device_alloc(const struct lu_env *env,
621 struct lu_device_type *type,
622 struct lustre_cfg *lcfg)
624 struct lod_device *lod;
625 struct lu_device *lu_dev;
629 lu_dev = ERR_PTR(-ENOMEM);
633 lu_dev = lod2lu_dev(lod);
634 dt_device_init(&lod->lod_dt_dev, type);
635 rc = lod_init0(env, lod, type, lcfg);
637 lod_device_free(env, lu_dev);
638 lu_dev = ERR_PTR(rc);
645 static struct lu_device *lod_device_fini(const struct lu_env *env,
648 struct lod_device *lod = lu2lod_dev(d);
654 lod_procfs_fini(lod);
656 rc = lod_fini_tgt(lod, &lod->lod_ost_descs);
658 CERROR("%s:can not fini ost descs %d\n",
659 lod2obd(lod)->obd_name, rc);
661 rc = lod_fini_tgt(lod, &lod->lod_mdt_descs);
663 CERROR("%s:can not fini mdt descs %d\n",
664 lod2obd(lod)->obd_name, rc);
670 * we use exports to track all LOD users
672 static int lod_obd_connect(const struct lu_env *env, struct obd_export **exp,
673 struct obd_device *obd, struct obd_uuid *cluuid,
674 struct obd_connect_data *data, void *localdata)
676 struct lod_device *lod = lu2lod_dev(obd->obd_lu_dev);
677 struct lustre_handle conn;
681 CDEBUG(D_CONFIG, "connect #%d\n", lod->lod_connects);
683 rc = class_connect(&conn, obd, cluuid);
687 *exp = class_conn2export(&conn);
689 spin_lock(&lod->lod_connects_lock);
691 /* at the moment we expect the only user */
692 LASSERT(lod->lod_connects == 1);
693 spin_unlock(&lod->lod_connects_lock);
699 * once last export (we don't count self-export) disappeared
700 * lod can be released
702 static int lod_obd_disconnect(struct obd_export *exp)
704 struct obd_device *obd = exp->exp_obd;
705 struct lod_device *lod = lu2lod_dev(obd->obd_lu_dev);
709 /* Only disconnect the underlying layers on the final disconnect. */
710 spin_lock(&lod->lod_connects_lock);
712 if (lod->lod_connects != 0) {
713 /* why should there be more than 1 connect? */
714 spin_unlock(&lod->lod_connects_lock);
715 CERROR("%s: disconnect #%d\n", exp->exp_obd->obd_name,
719 spin_unlock(&lod->lod_connects_lock);
721 /* the last user of lod has gone, let's release the device */
725 rc = class_disconnect(exp); /* bz 9811 */
727 if (rc == 0 && release)
728 class_manual_cleanup(obd);
732 LU_KEY_INIT(lod, struct lod_thread_info);
734 static void lod_key_fini(const struct lu_context *ctx,
735 struct lu_context_key *key, void *data)
737 struct lod_thread_info *info = data;
738 /* allocated in lod_get_lov_ea
739 * XXX: this is overload, a tread may have such store but used only
740 * once. Probably better would be pool of such stores per LOD.
742 if (info->lti_ea_store) {
743 OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
744 info->lti_ea_store = NULL;
745 info->lti_ea_store_size = 0;
750 /* context key: lod_thread_key */
751 LU_CONTEXT_KEY_DEFINE(lod, LCT_MD_THREAD);
753 LU_TYPE_INIT_FINI(lod, &lod_thread_key);
755 static struct lu_device_type_operations lod_device_type_ops = {
756 .ldto_init = lod_type_init,
757 .ldto_fini = lod_type_fini,
759 .ldto_start = lod_type_start,
760 .ldto_stop = lod_type_stop,
762 .ldto_device_alloc = lod_device_alloc,
763 .ldto_device_free = lod_device_free,
765 .ldto_device_fini = lod_device_fini
768 static struct lu_device_type lod_device_type = {
769 .ldt_tags = LU_DEVICE_DT,
770 .ldt_name = LUSTRE_LOD_NAME,
771 .ldt_ops = &lod_device_type_ops,
772 .ldt_ctx_tags = LCT_MD_THREAD,
775 static int lod_obd_health_check(const struct lu_env *env,
776 struct obd_device *obd)
778 struct lod_device *d = lu2lod_dev(obd->obd_lu_dev);
779 struct lod_ost_desc *ost;
784 lod_getref(&d->lod_ost_descs);
785 lod_foreach_ost(d, i) {
787 LASSERT(ost && ost->ltd_ost);
788 rc = obd_health_check(env, ost->ltd_exp->exp_obd);
789 /* one healthy device is enough */
793 lod_putref(d, &d->lod_ost_descs);
797 static struct obd_ops lod_obd_device_ops = {
798 .o_owner = THIS_MODULE,
799 .o_connect = lod_obd_connect,
800 .o_disconnect = lod_obd_disconnect,
801 .o_health_check = lod_obd_health_check,
802 .o_pool_new = lod_pool_new,
803 .o_pool_rem = lod_pool_remove,
804 .o_pool_add = lod_pool_add,
805 .o_pool_del = lod_pool_del,
808 static int __init lod_mod_init(void)
810 struct lprocfs_static_vars lvars = { 0 };
811 cfs_proc_dir_entry_t *lov_proc_dir;
814 rc = lu_kmem_init(lod_caches);
818 lprocfs_lod_init_vars(&lvars);
820 rc = class_register_type(&lod_obd_device_ops, NULL, lvars.module_vars,
821 LUSTRE_LOD_NAME, &lod_device_type);
823 lu_kmem_fini(lod_caches);
827 /* create "lov" entry in procfs for compatibility purposes */
828 lov_proc_dir = lprocfs_srch(proc_lustre_root, "lov");
829 if (lov_proc_dir == NULL) {
830 lov_proc_dir = lprocfs_register("lov", proc_lustre_root,
832 if (IS_ERR(lov_proc_dir))
833 CERROR("lod: can't create compat entry \"lov\": %d\n",
834 (int)PTR_ERR(lov_proc_dir));
840 static void __exit lod_mod_exit(void)
843 lprocfs_try_remove_proc_entry("lov", proc_lustre_root);
845 class_unregister_type(LUSTRE_LOD_NAME);
846 lu_kmem_fini(lod_caches);
849 MODULE_AUTHOR("Whamcloud, Inc. <http://www.whamcloud.com/>");
850 MODULE_DESCRIPTION("Lustre Logical Object Device ("LUSTRE_LOD_NAME")");
851 MODULE_LICENSE("GPL");
853 module_init(lod_mod_init);
854 module_exit(lod_mod_exit);