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 lu_object_operations lod_lu_robj_ops;
98 extern struct dt_object_operations lod_obj_ops;
100 /* Slab for OSD object allocation */
101 cfs_mem_cache_t *lod_object_kmem;
103 static struct lu_kmem_descr lod_caches[] = {
105 .ckd_cache = &lod_object_kmem,
106 .ckd_name = "lod_obj",
107 .ckd_size = sizeof(struct lod_object)
114 static struct lu_device *lod_device_fini(const struct lu_env *env,
115 struct lu_device *d);
117 struct lu_object *lod_object_alloc(const struct lu_env *env,
118 const struct lu_object_header *hdr,
119 struct lu_device *dev)
121 struct lod_object *lod_obj;
122 struct lu_object *lu_obj;
123 const struct lu_fid *fid = &hdr->loh_fid;
128 OBD_SLAB_ALLOC_PTR_GFP(lod_obj, lod_object_kmem, CFS_ALLOC_IO);
130 RETURN(ERR_PTR(-ENOMEM));
132 rc = lod_fld_lookup(env, lu2lod_dev(dev), fid, &mds, LU_SEQ_RANGE_MDT);
134 OBD_SLAB_FREE_PTR(lod_obj, lod_object_kmem);
138 lod_obj->ldo_mds_num = mds;
139 lu_obj = lod2lu_obj(lod_obj);
140 dt_object_init(&lod_obj->ldo_obj, NULL, dev);
141 lod_obj->ldo_obj.do_ops = &lod_obj_ops;
142 if (likely(mds == lu_site2seq(dev->ld_site)->ss_node_id))
143 lu_obj->lo_ops = &lod_lu_obj_ops;
145 lu_obj->lo_ops = &lod_lu_robj_ops;
149 static int lod_cleanup_desc_tgts(const struct lu_env *env,
150 struct lod_device *lod,
151 struct lod_tgt_descs *ltd,
152 struct lustre_cfg *lcfg)
154 struct lu_device *next;
159 if (ltd->ltd_tgts_size <= 0) {
160 lod_putref(lod, ltd);
163 cfs_foreach_bit(ltd->ltd_tgt_bitmap, i) {
164 struct lod_tgt_desc *tgt;
167 tgt = LTD_TGT(ltd, i);
168 LASSERT(tgt && tgt->ltd_tgt);
169 next = &tgt->ltd_tgt->dd_lu_dev;
170 rc1 = next->ld_ops->ldo_process_config(env, next, lcfg);
172 CERROR("%s: error cleaning up LOD index %u: cmd %#x"
173 ": rc = %d\n", lod2obd(lod)->obd_name, i,
174 lcfg->lcfg_command, rc1);
178 lod_putref(lod, ltd);
182 static int lodname2mdt_index(char *lodname, int *index)
186 /* The lodname suppose to be fsname-MDTxxxx-mdtlov */
187 ptr = strrchr(lodname, '-');
189 CERROR("invalid MDT index in '%s'\n", lodname);
193 if (strncmp(ptr, "-mdtlov", 7) != 0) {
194 CERROR("invalid MDT index in '%s'\n", lodname);
198 if ((unsigned long)ptr - (unsigned long)lodname <= 8) {
199 CERROR("invalid MDT index in '%s'\n", lodname);
203 if (strncmp(ptr - 8, "-MDT", 4) != 0) {
204 CERROR("invalid MDT index in '%s'\n", lodname);
208 *index = simple_strtol(ptr - 4, &tmp, 16);
209 if (*tmp != '-' || *index > INT_MAX || *index < 0) {
210 CERROR("invalid MDT index in '%s'\n", lodname);
216 static int lod_process_config(const struct lu_env *env,
217 struct lu_device *dev,
218 struct lustre_cfg *lcfg)
220 struct lod_device *lod = lu2lod_dev(dev);
221 struct lu_device *next = &lod->lod_child->dd_lu_dev;
226 switch(lcfg->lcfg_command) {
227 case LCFG_LOV_DEL_OBD:
228 case LCFG_LOV_ADD_INA:
229 case LCFG_LOV_ADD_OBD:
234 /* lov_modify_tgts add 0:lov_mdsA 1:osp 2:0 3:1
235 * modify_mdc_tgts add 0:lustre-MDT0001
236 * 1:lustre-MDT0001-mdc0002
238 arg1 = lustre_cfg_string(lcfg, 1);
240 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
241 GOTO(out, rc = -EINVAL);
242 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
243 GOTO(out, rc = -EINVAL);
245 if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD) {
247 mdt = strstr(lustre_cfg_string(lcfg, 0), "-MDT");
248 /* 1.8 configs don't have "-MDT0000" at the end */
252 rc = lodname2mdt_index(
253 lustre_cfg_string(lcfg, 0), &mdt_index);
257 rc = lod_add_device(env, lod, arg1, index, gen,
258 mdt_index, LUSTRE_OSC_NAME, 1);
259 } else if (lcfg->lcfg_command == LCFG_ADD_MDC) {
261 rc = lod_add_device(env, lod, arg1, index, gen,
262 mdt_index, LUSTRE_MDC_NAME, 1);
263 } else if (lcfg->lcfg_command == LCFG_LOV_ADD_INA) {
264 /*FIXME: Add mdt_index for LCFG_LOV_ADD_INA*/
266 rc = lod_add_device(env, lod, arg1, index, gen,
267 mdt_index, LUSTRE_OSC_NAME, 0);
269 rc = lod_del_device(env, lod,
278 struct lprocfs_static_vars v = { 0 };
279 struct obd_device *obd = lod2obd(lod);
281 lprocfs_lod_init_vars(&v);
283 rc = class_process_proc_param(PARAM_LOV, v.obd_vars, lcfg, obd);
289 lu_dev_del_linkage(dev->ld_site, dev);
290 lod_cleanup_desc_tgts(env, lod, &lod->lod_mdt_descs, lcfg);
291 lod_cleanup_desc_tgts(env, lod, &lod->lod_ost_descs, lcfg);
293 * do cleanup on underlying storage only when
294 * all OSPs are cleaned up, as they use that OSD as well
296 next = &lod->lod_child->dd_lu_dev;
297 rc = next->ld_ops->ldo_process_config(env, next, lcfg);
299 CERROR("%s: can't process %u: %d\n",
300 lod2obd(lod)->obd_name, lcfg->lcfg_command, rc);
302 rc = obd_disconnect(lod->lod_child_exp);
304 CERROR("error in disconnect from storage: %d\n", rc);
308 CERROR("%s: unknown command %u\n", lod2obd(lod)->obd_name,
318 static int lod_recovery_complete(const struct lu_env *env,
319 struct lu_device *dev)
321 struct lod_device *lod = lu2lod_dev(dev);
322 struct lu_device *next = &lod->lod_child->dd_lu_dev;
326 LASSERT(lod->lod_recovery_completed == 0);
327 lod->lod_recovery_completed = 1;
329 rc = next->ld_ops->ldo_recovery_complete(env, next);
331 lod_getref(&lod->lod_ost_descs);
332 if (lod->lod_osts_size > 0) {
333 cfs_foreach_bit(lod->lod_ost_bitmap, i) {
334 struct lod_tgt_desc *tgt;
335 tgt = OST_TGT(lod, i);
336 LASSERT(tgt && tgt->ltd_tgt);
337 next = &tgt->ltd_ost->dd_lu_dev;
338 rc = next->ld_ops->ldo_recovery_complete(env, next);
340 CERROR("%s: can't complete recovery on #%d:"
341 "%d\n", lod2obd(lod)->obd_name, i, rc);
344 lod_putref(lod, &lod->lod_ost_descs);
348 static int lod_prepare(const struct lu_env *env, struct lu_device *pdev,
349 struct lu_device *cdev)
351 struct lod_device *lod = lu2lod_dev(cdev);
352 struct lu_device *next = &lod->lod_child->dd_lu_dev;
356 rc = next->ld_ops->ldo_prepare(env, pdev, next);
358 CERROR("%s: prepare bottom error: rc = %d\n",
359 lod2obd(lod)->obd_name, rc);
363 lod->lod_initialized = 1;
368 const struct lu_device_operations lod_lu_ops = {
369 .ldo_object_alloc = lod_object_alloc,
370 .ldo_process_config = lod_process_config,
371 .ldo_recovery_complete = lod_recovery_complete,
372 .ldo_prepare = lod_prepare,
375 static int lod_root_get(const struct lu_env *env,
376 struct dt_device *dev, struct lu_fid *f)
378 return dt_root_get(env, dt2lod_dev(dev)->lod_child, f);
381 static int lod_statfs(const struct lu_env *env,
382 struct dt_device *dev, struct obd_statfs *sfs)
384 return dt_statfs(env, dt2lod_dev(dev)->lod_child, sfs);
387 static struct thandle *lod_trans_create(const struct lu_env *env,
388 struct dt_device *dev)
390 return dt_trans_create(env, dt2lod_dev(dev)->lod_child);
393 static int lod_trans_start(const struct lu_env *env, struct dt_device *dev,
396 return dt_trans_start(env, dt2lod_dev(dev)->lod_child, th);
399 static int lod_trans_stop(const struct lu_env *env, struct thandle *th)
401 /* XXX: we don't know next device, will be fixed with DNE */
402 return dt_trans_stop(env, th->th_dev, th);
405 static void lod_conf_get(const struct lu_env *env,
406 const struct dt_device *dev,
407 struct dt_device_param *param)
409 dt_conf_get(env, dt2lod_dev((struct dt_device *)dev)->lod_child, param);
412 static int lod_sync(const struct lu_env *env, struct dt_device *dev)
414 struct lod_device *lod = dt2lod_dev(dev);
415 struct lod_ost_desc *ost;
419 lod_getref(&lod->lod_ost_descs);
420 lod_foreach_ost(lod, i) {
421 ost = OST_TGT(lod, i);
422 LASSERT(ost && ost->ltd_ost);
423 rc = dt_sync(env, ost->ltd_ost);
425 CERROR("%s: can't sync %u: %d\n",
426 lod2obd(lod)->obd_name, i, rc);
430 lod_putref(lod, &lod->lod_ost_descs);
432 rc = dt_sync(env, lod->lod_child);
437 static int lod_ro(const struct lu_env *env, struct dt_device *dev)
439 return dt_ro(env, dt2lod_dev(dev)->lod_child);
442 static int lod_commit_async(const struct lu_env *env, struct dt_device *dev)
444 return dt_commit_async(env, dt2lod_dev(dev)->lod_child);
447 static int lod_init_capa_ctxt(const struct lu_env *env, struct dt_device *dev,
448 int mode, unsigned long timeout,
449 __u32 alg, struct lustre_capa_key *keys)
451 struct dt_device *next = dt2lod_dev(dev)->lod_child;
452 return dt_init_capa_ctxt(env, next, mode, timeout, alg, keys);
455 static const struct dt_device_operations lod_dt_ops = {
456 .dt_root_get = lod_root_get,
457 .dt_statfs = lod_statfs,
458 .dt_trans_create = lod_trans_create,
459 .dt_trans_start = lod_trans_start,
460 .dt_trans_stop = lod_trans_stop,
461 .dt_conf_get = lod_conf_get,
464 .dt_commit_async = lod_commit_async,
465 .dt_init_capa_ctxt = lod_init_capa_ctxt,
468 static int lod_connect_to_osd(const struct lu_env *env, struct lod_device *lod,
469 struct lustre_cfg *cfg)
471 struct obd_connect_data *data = NULL;
472 struct obd_device *obd;
473 char *nextdev = NULL, *p, *s;
478 LASSERT(lod->lod_child_exp == NULL);
480 /* compatibility hack: we still use old config logs
481 * which specify LOV, but we need to learn underlying
482 * OSD device, which is supposed to be:
483 * <fsname>-MDTxxxx-osd
485 * 2.x MGS generates lines like the following:
486 * #03 (176)lov_setup 0:lustre-MDT0000-mdtlov 1:(struct lov_desc)
487 * 1.8 MGS generates lines like the following:
488 * #03 (168)lov_setup 0:lustre-mdtlov 1:(struct lov_desc)
490 * we use "-MDT" to differentiate 2.x from 1.8 */
492 if ((p = lustre_cfg_string(cfg, 0)) && strstr(p, "-mdtlov")) {
494 OBD_ALLOC(nextdev, len);
496 GOTO(out, rc = -ENOMEM);
499 s = strstr(nextdev, "-mdtlov");
500 if (unlikely(s == NULL)) {
501 CERROR("unable to parse device name %s\n",
502 lustre_cfg_string(cfg, 0));
503 GOTO(out, rc = -EINVAL);
506 if (strstr(nextdev, "-MDT")) {
511 strcpy(s, "-MDT0000-osd");
514 CERROR("unable to parse device name %s\n",
515 lustre_cfg_string(cfg, 0));
516 GOTO(out, rc = -EINVAL);
521 GOTO(out, rc = -ENOMEM);
523 obd = class_name2obd(nextdev);
525 CERROR("can not locate next device: %s\n", nextdev);
526 GOTO(out, rc = -ENOTCONN);
529 data->ocd_connect_flags = OBD_CONNECT_VERSION;
530 data->ocd_version = LUSTRE_VERSION_CODE;
532 rc = obd_connect(env, &lod->lod_child_exp, obd, &obd->obd_uuid,
535 CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
539 lod->lod_dt_dev.dd_lu_dev.ld_site =
540 lod->lod_child_exp->exp_obd->obd_lu_dev->ld_site;
541 LASSERT(lod->lod_dt_dev.dd_lu_dev.ld_site);
542 lod->lod_child = lu2dt_dev(lod->lod_child_exp->exp_obd->obd_lu_dev);
548 OBD_FREE(nextdev, len);
552 static int lod_tgt_desc_init(struct lod_tgt_descs *ltd)
554 mutex_init(<d->ltd_mutex);
555 init_rwsem(<d->ltd_rw_sem);
557 /* the OST array and bitmap are allocated/grown dynamically as OSTs are
558 * added to the LOD, see lod_add_device() */
559 ltd->ltd_tgt_bitmap = CFS_ALLOCATE_BITMAP(32);
560 if (ltd->ltd_tgt_bitmap == NULL)
563 ltd->ltd_tgts_size = 32;
566 ltd->ltd_death_row = 0;
567 ltd->ltd_refcount = 0;
571 static int lod_init0(const struct lu_env *env, struct lod_device *lod,
572 struct lu_device_type *ldt, struct lustre_cfg *cfg)
574 struct dt_device_param ddp;
575 struct obd_device *obd;
579 obd = class_name2obd(lustre_cfg_string(cfg, 0));
581 CERROR("Cannot find obd with name %s\n",
582 lustre_cfg_string(cfg, 0));
586 obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev;
587 lod->lod_dt_dev.dd_lu_dev.ld_obd = obd;
588 lod->lod_dt_dev.dd_lu_dev.ld_ops = &lod_lu_ops;
589 lod->lod_dt_dev.dd_ops = &lod_dt_ops;
591 rc = lod_connect_to_osd(env, lod, cfg);
595 dt_conf_get(env, &lod->lod_dt_dev, &ddp);
596 lod->lod_osd_max_easize = ddp.ddp_max_ea_size;
598 /* setup obd to be used with old lov code */
599 rc = lod_pools_init(lod, cfg);
601 GOTO(out_disconnect, rc);
603 rc = lod_procfs_init(lod);
607 spin_lock_init(&lod->lod_desc_lock);
608 spin_lock_init(&lod->lod_connects_lock);
609 lod_tgt_desc_init(&lod->lod_mdt_descs);
610 lod_tgt_desc_init(&lod->lod_ost_descs);
617 obd_disconnect(lod->lod_child_exp);
621 static struct lu_device *lod_device_free(const struct lu_env *env,
622 struct lu_device *lu)
624 struct lod_device *lod = lu2lod_dev(lu);
625 struct lu_device *next = &lod->lod_child->dd_lu_dev;
628 LASSERT(cfs_atomic_read(&lu->ld_ref) == 0);
629 dt_device_fini(&lod->lod_dt_dev);
634 static struct lu_device *lod_device_alloc(const struct lu_env *env,
635 struct lu_device_type *type,
636 struct lustre_cfg *lcfg)
638 struct lod_device *lod;
639 struct lu_device *lu_dev;
643 lu_dev = ERR_PTR(-ENOMEM);
647 lu_dev = lod2lu_dev(lod);
648 dt_device_init(&lod->lod_dt_dev, type);
649 rc = lod_init0(env, lod, type, lcfg);
651 lod_device_free(env, lu_dev);
652 lu_dev = ERR_PTR(rc);
659 static struct lu_device *lod_device_fini(const struct lu_env *env,
662 struct lod_device *lod = lu2lod_dev(d);
668 lod_procfs_fini(lod);
670 rc = lod_fini_tgt(lod, &lod->lod_ost_descs);
672 CERROR("%s:can not fini ost descs %d\n",
673 lod2obd(lod)->obd_name, rc);
675 rc = lod_fini_tgt(lod, &lod->lod_mdt_descs);
677 CERROR("%s:can not fini mdt descs %d\n",
678 lod2obd(lod)->obd_name, rc);
684 * we use exports to track all LOD users
686 static int lod_obd_connect(const struct lu_env *env, struct obd_export **exp,
687 struct obd_device *obd, struct obd_uuid *cluuid,
688 struct obd_connect_data *data, void *localdata)
690 struct lod_device *lod = lu2lod_dev(obd->obd_lu_dev);
691 struct lustre_handle conn;
695 CDEBUG(D_CONFIG, "connect #%d\n", lod->lod_connects);
697 rc = class_connect(&conn, obd, cluuid);
701 *exp = class_conn2export(&conn);
703 spin_lock(&lod->lod_connects_lock);
705 /* at the moment we expect the only user */
706 LASSERT(lod->lod_connects == 1);
707 spin_unlock(&lod->lod_connects_lock);
713 * once last export (we don't count self-export) disappeared
714 * lod can be released
716 static int lod_obd_disconnect(struct obd_export *exp)
718 struct obd_device *obd = exp->exp_obd;
719 struct lod_device *lod = lu2lod_dev(obd->obd_lu_dev);
723 /* Only disconnect the underlying layers on the final disconnect. */
724 spin_lock(&lod->lod_connects_lock);
726 if (lod->lod_connects != 0) {
727 /* why should there be more than 1 connect? */
728 spin_unlock(&lod->lod_connects_lock);
729 CERROR("%s: disconnect #%d\n", exp->exp_obd->obd_name,
733 spin_unlock(&lod->lod_connects_lock);
735 /* the last user of lod has gone, let's release the device */
739 rc = class_disconnect(exp); /* bz 9811 */
741 if (rc == 0 && release)
742 class_manual_cleanup(obd);
746 LU_KEY_INIT(lod, struct lod_thread_info);
748 static void lod_key_fini(const struct lu_context *ctx,
749 struct lu_context_key *key, void *data)
751 struct lod_thread_info *info = data;
752 /* allocated in lod_get_lov_ea
753 * XXX: this is overload, a tread may have such store but used only
754 * once. Probably better would be pool of such stores per LOD.
756 if (info->lti_ea_store) {
757 OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
758 info->lti_ea_store = NULL;
759 info->lti_ea_store_size = 0;
764 /* context key: lod_thread_key */
765 LU_CONTEXT_KEY_DEFINE(lod, LCT_MD_THREAD);
767 LU_TYPE_INIT_FINI(lod, &lod_thread_key);
769 static struct lu_device_type_operations lod_device_type_ops = {
770 .ldto_init = lod_type_init,
771 .ldto_fini = lod_type_fini,
773 .ldto_start = lod_type_start,
774 .ldto_stop = lod_type_stop,
776 .ldto_device_alloc = lod_device_alloc,
777 .ldto_device_free = lod_device_free,
779 .ldto_device_fini = lod_device_fini
782 static struct lu_device_type lod_device_type = {
783 .ldt_tags = LU_DEVICE_DT,
784 .ldt_name = LUSTRE_LOD_NAME,
785 .ldt_ops = &lod_device_type_ops,
786 .ldt_ctx_tags = LCT_MD_THREAD,
789 static int lod_obd_health_check(const struct lu_env *env,
790 struct obd_device *obd)
792 struct lod_device *d = lu2lod_dev(obd->obd_lu_dev);
793 struct lod_ost_desc *ost;
798 lod_getref(&d->lod_ost_descs);
799 lod_foreach_ost(d, i) {
801 LASSERT(ost && ost->ltd_ost);
802 rc = obd_health_check(env, ost->ltd_exp->exp_obd);
803 /* one healthy device is enough */
807 lod_putref(d, &d->lod_ost_descs);
811 static struct obd_ops lod_obd_device_ops = {
812 .o_owner = THIS_MODULE,
813 .o_connect = lod_obd_connect,
814 .o_disconnect = lod_obd_disconnect,
815 .o_health_check = lod_obd_health_check,
816 .o_pool_new = lod_pool_new,
817 .o_pool_rem = lod_pool_remove,
818 .o_pool_add = lod_pool_add,
819 .o_pool_del = lod_pool_del,
822 static int __init lod_mod_init(void)
824 struct lprocfs_static_vars lvars = { 0 };
825 cfs_proc_dir_entry_t *lov_proc_dir;
828 rc = lu_kmem_init(lod_caches);
832 lprocfs_lod_init_vars(&lvars);
834 rc = class_register_type(&lod_obd_device_ops, NULL, lvars.module_vars,
835 LUSTRE_LOD_NAME, &lod_device_type);
837 lu_kmem_fini(lod_caches);
841 /* create "lov" entry in procfs for compatibility purposes */
842 lov_proc_dir = lprocfs_srch(proc_lustre_root, "lov");
843 if (lov_proc_dir == NULL) {
844 lov_proc_dir = lprocfs_register("lov", proc_lustre_root,
846 if (IS_ERR(lov_proc_dir))
847 CERROR("lod: can't create compat entry \"lov\": %d\n",
848 (int)PTR_ERR(lov_proc_dir));
854 static void __exit lod_mod_exit(void)
857 lprocfs_try_remove_proc_entry("lov", proc_lustre_root);
859 class_unregister_type(LUSTRE_LOD_NAME);
860 lu_kmem_fini(lod_caches);
863 MODULE_AUTHOR("Whamcloud, Inc. <http://www.whamcloud.com/>");
864 MODULE_DESCRIPTION("Lustre Logical Object Device ("LUSTRE_LOD_NAME")");
865 MODULE_LICENSE("GPL");
867 module_init(lod_mod_init);
868 module_exit(lod_mod_exit);