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 (c) 2012, 2014, Intel Corporation.
26 * lustre/obdclass/local_storage.c
28 * Local storage for file/objects with fid generation. Works on top of OSD.
30 * Author: Mikhail Pershin <mike.pershin@intel.com>
33 #define DEBUG_SUBSYSTEM S_CLASS
35 #include "local_storage.h"
37 /* all initialized local storages on this node are linked on this */
38 static struct list_head ls_list_head = LIST_HEAD_INIT(ls_list_head);
39 static DEFINE_MUTEX(ls_list_mutex);
41 static int ls_object_init(const struct lu_env *env, struct lu_object *o,
42 const struct lu_object_conf *unused)
45 struct lu_object *below;
46 struct lu_device *under;
50 ls = container_of0(o->lo_dev, struct ls_device, ls_top_dev.dd_lu_dev);
51 under = &ls->ls_osd->dd_lu_dev;
52 below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
56 lu_object_add(o, below);
61 static void ls_object_free(const struct lu_env *env, struct lu_object *o)
63 struct ls_object *obj = lu2ls_obj(o);
64 struct lu_object_header *h = o->lo_header;
66 dt_object_fini(&obj->ls_obj);
67 lu_object_header_fini(h);
71 static struct lu_object_operations ls_lu_obj_ops = {
72 .loo_object_init = ls_object_init,
73 .loo_object_free = ls_object_free,
76 static struct lu_object *ls_object_alloc(const struct lu_env *env,
77 const struct lu_object_header *_h,
80 struct lu_object_header *h;
91 lu_object_header_init(h);
92 dt_object_init(&o->ls_obj, h, d);
93 lu_object_add_top(h, l);
95 l->lo_ops = &ls_lu_obj_ops;
103 static struct lu_device_operations ls_lu_dev_ops = {
104 .ldo_object_alloc = ls_object_alloc
107 static struct ls_device *__ls_find_dev(struct dt_device *dev)
109 struct ls_device *ls, *ret = NULL;
111 list_for_each_entry(ls, &ls_list_head, ls_linkage) {
112 if (ls->ls_osd == dev) {
113 atomic_inc(&ls->ls_refcount);
121 struct ls_device *ls_find_dev(struct dt_device *dev)
123 struct ls_device *ls;
125 mutex_lock(&ls_list_mutex);
126 ls = __ls_find_dev(dev);
127 mutex_unlock(&ls_list_mutex);
132 static struct lu_device_type_operations ls_device_type_ops = {
137 static struct lu_device_type ls_lu_type = {
138 .ldt_name = "local_storage",
139 .ldt_ops = &ls_device_type_ops,
142 struct ls_device *ls_device_get(struct dt_device *dev)
144 struct ls_device *ls;
148 mutex_lock(&ls_list_mutex);
149 ls = __ls_find_dev(dev);
153 /* not found, then create */
156 GOTO(out_ls, ls = ERR_PTR(-ENOMEM));
158 atomic_set(&ls->ls_refcount, 1);
159 INIT_LIST_HEAD(&ls->ls_los_list);
160 mutex_init(&ls->ls_los_mutex);
164 LASSERT(dev->dd_lu_dev.ld_site);
165 lu_device_init(&ls->ls_top_dev.dd_lu_dev, &ls_lu_type);
166 ls->ls_top_dev.dd_lu_dev.ld_ops = &ls_lu_dev_ops;
167 ls->ls_top_dev.dd_lu_dev.ld_site = dev->dd_lu_dev.ld_site;
169 /* finally add ls to the list */
170 list_add(&ls->ls_linkage, &ls_list_head);
172 mutex_unlock(&ls_list_mutex);
176 void ls_device_put(const struct lu_env *env, struct ls_device *ls)
179 if (!atomic_dec_and_test(&ls->ls_refcount))
182 mutex_lock(&ls_list_mutex);
183 if (atomic_read(&ls->ls_refcount) == 0) {
184 LASSERT(list_empty(&ls->ls_los_list));
185 list_del(&ls->ls_linkage);
186 lu_site_purge(env, ls->ls_top_dev.dd_lu_dev.ld_site, ~0);
187 lu_device_fini(&ls->ls_top_dev.dd_lu_dev);
190 mutex_unlock(&ls_list_mutex);
194 * local file fid generation
196 int local_object_fid_generate(const struct lu_env *env,
197 struct local_oid_storage *los,
200 LASSERT(los->los_dev);
201 LASSERT(los->los_obj);
205 /* to make it unique after reboot we store
206 * the latest generated fid atomically with
207 * object creation see local_object_create() */
209 mutex_lock(&los->los_id_lock);
210 fid->f_seq = los->los_seq;
211 fid->f_oid = ++los->los_last_oid;
213 mutex_unlock(&los->los_id_lock);
218 int local_object_declare_create(const struct lu_env *env,
219 struct local_oid_storage *los,
220 struct dt_object *o, struct lu_attr *attr,
221 struct dt_object_format *dof,
224 struct dt_thread_info *dti = dt_info(env);
229 /* update fid generation file */
231 LASSERT(dt_object_exists(los->los_obj));
232 dti->dti_lb.lb_buf = NULL;
233 dti->dti_lb.lb_len = sizeof(struct los_ondisk);
234 rc = dt_declare_record_write(env, los->los_obj,
235 &dti->dti_lb, 0, th);
240 rc = dt_declare_create(env, o, attr, NULL, dof, th);
244 dti->dti_lb.lb_buf = NULL;
245 dti->dti_lb.lb_len = sizeof(dti->dti_lma);
246 rc = dt_declare_xattr_set(env, o, &dti->dti_lb, XATTR_NAME_LMA, 0, th);
251 int local_object_create(const struct lu_env *env,
252 struct local_oid_storage *los,
253 struct dt_object *o, struct lu_attr *attr,
254 struct dt_object_format *dof, struct thandle *th)
256 struct dt_thread_info *dti = dt_info(env);
262 rc = dt_create(env, o, attr, NULL, dof, th);
269 LASSERT(los->los_obj);
270 LASSERT(dt_object_exists(los->los_obj));
272 /* many threads can be updated this, serialize
273 * them here to avoid the race where one thread
274 * takes the value first, but writes it last */
275 mutex_lock(&los->los_id_lock);
277 /* update local oid number on disk so that
278 * we know the last one used after reboot */
279 lastid = cpu_to_le64(los->los_last_oid);
282 dti->dti_lb.lb_buf = &lastid;
283 dti->dti_lb.lb_len = sizeof(lastid);
284 rc = dt_record_write(env, los->los_obj, &dti->dti_lb, &dti->dti_off,
286 mutex_unlock(&los->los_id_lock);
292 * Create local named object (file, directory or index) in parent directory.
294 static struct dt_object *__local_file_create(const struct lu_env *env,
295 const struct lu_fid *fid,
296 struct local_oid_storage *los,
297 struct ls_device *ls,
298 struct dt_object *parent,
300 struct lu_attr *attr,
301 struct dt_object_format *dof)
303 struct dt_thread_info *dti = dt_info(env);
304 struct lu_object_conf *conf = &dti->dti_conf;
305 struct dt_insert_rec *rec = &dti->dti_dt_rec;
306 struct dt_object *dto;
310 /* We know that the target object does not exist, to be created,
311 * then give some hints - LOC_F_NEW to help low layer to handle
312 * that efficiently and properly. */
313 memset(conf, 0, sizeof(*conf));
314 conf->loc_flags = LOC_F_NEW;
315 dto = ls_locate(env, ls, fid, conf);
316 if (unlikely(IS_ERR(dto)))
319 LASSERT(dto != NULL);
320 if (dt_object_exists(dto))
321 GOTO(out, rc = -EEXIST);
323 th = dt_trans_create(env, ls->ls_osd);
325 GOTO(out, rc = PTR_ERR(th));
327 rc = local_object_declare_create(env, los, dto, attr, dof, th);
329 GOTO(trans_stop, rc);
331 if (dti->dti_dof.dof_type == DFT_DIR) {
332 rc = dt_declare_ref_add(env, dto, th);
334 GOTO(trans_stop, rc);
336 rc = dt_declare_ref_add(env, parent, th);
338 GOTO(trans_stop, rc);
342 rec->rec_type = dto->do_lu.lo_header->loh_attr;
343 rc = dt_declare_insert(env, parent, (const struct dt_rec *)rec,
344 (const struct dt_key *)name, th);
346 GOTO(trans_stop, rc);
348 rc = dt_trans_start_local(env, ls->ls_osd, th);
350 GOTO(trans_stop, rc);
352 dt_write_lock(env, dto, 0);
353 if (dt_object_exists(dto))
354 GOTO(unlock, rc = 0);
356 CDEBUG(D_OTHER, "create new object "DFID"\n",
357 PFID(lu_object_fid(&dto->do_lu)));
358 rc = local_object_create(env, los, dto, attr, dof, th);
361 LASSERT(dt_object_exists(dto));
363 if (dti->dti_dof.dof_type == DFT_DIR) {
364 if (!dt_try_as_dir(env, dto))
365 GOTO(destroy, rc = -ENOTDIR);
367 rec->rec_type = S_IFDIR;
369 /* Add "." and ".." for newly created dir */
370 rc = dt_insert(env, dto, (const struct dt_rec *)rec,
371 (const struct dt_key *)".", th, BYPASS_CAPA, 1);
375 dt_ref_add(env, dto, th);
376 rec->rec_fid = lu_object_fid(&parent->do_lu);
377 rc = dt_insert(env, dto, (const struct dt_rec *)rec,
378 (const struct dt_key *)"..", th, BYPASS_CAPA, 1);
384 rec->rec_type = dto->do_lu.lo_header->loh_attr;
385 dt_write_lock(env, parent, 0);
386 rc = dt_insert(env, parent, (const struct dt_rec *)rec,
387 (const struct dt_key *)name, th, BYPASS_CAPA, 1);
388 if (dti->dti_dof.dof_type == DFT_DIR)
389 dt_ref_add(env, parent, th);
390 dt_write_unlock(env, parent);
395 dt_destroy(env, dto, th);
397 dt_write_unlock(env, dto);
399 dt_trans_stop(env, ls->ls_osd, th);
402 lu_object_put_nocache(env, &dto->do_lu);
409 * Look up and create (if it does not exist) a local named file or directory in
412 struct dt_object *local_file_find_or_create(const struct lu_env *env,
413 struct local_oid_storage *los,
414 struct dt_object *parent,
415 const char *name, __u32 mode)
417 struct dt_thread_info *dti = dt_info(env);
418 struct dt_object *dto;
423 rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
425 /* name is found, get the object */
426 dto = ls_locate(env, dt2ls_dev(los->los_dev),
427 &dti->dti_fid, NULL);
428 else if (rc != -ENOENT)
431 rc = local_object_fid_generate(env, los, &dti->dti_fid);
435 /* create the object */
436 dti->dti_attr.la_valid = LA_MODE;
437 dti->dti_attr.la_mode = mode;
438 dti->dti_dof.dof_type = dt_mode_to_dft(mode & S_IFMT);
439 dto = __local_file_create(env, &dti->dti_fid, los,
440 dt2ls_dev(los->los_dev),
441 parent, name, &dti->dti_attr,
447 EXPORT_SYMBOL(local_file_find_or_create);
449 struct dt_object *local_file_find_or_create_with_fid(const struct lu_env *env,
450 struct dt_device *dt,
451 const struct lu_fid *fid,
452 struct dt_object *parent,
456 struct dt_thread_info *dti = dt_info(env);
457 struct dt_object *dto;
462 rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
464 dto = dt_locate(env, dt, &dti->dti_fid);
465 } else if (rc != -ENOENT) {
468 struct ls_device *ls;
470 ls = ls_device_get(dt);
472 dto = ERR_PTR(PTR_ERR(ls));
474 /* create the object */
475 dti->dti_attr.la_valid = LA_MODE;
476 dti->dti_attr.la_mode = mode;
477 dti->dti_dof.dof_type = dt_mode_to_dft(mode & S_IFMT);
478 dto = __local_file_create(env, fid, NULL, ls, parent,
479 name, &dti->dti_attr,
481 /* ls_device_put() will finalize the ls device, we
482 * have to open the object in other device stack */
484 dti->dti_fid = dto->do_lu.lo_header->loh_fid;
485 lu_object_put_nocache(env, &dto->do_lu);
486 dto = dt_locate(env, dt, &dti->dti_fid);
488 ls_device_put(env, ls);
493 EXPORT_SYMBOL(local_file_find_or_create_with_fid);
496 * Look up and create (if it does not exist) a local named index file in parent
499 struct dt_object *local_index_find_or_create(const struct lu_env *env,
500 struct local_oid_storage *los,
501 struct dt_object *parent,
502 const char *name, __u32 mode,
503 const struct dt_index_features *ft)
505 struct dt_thread_info *dti = dt_info(env);
506 struct dt_object *dto;
511 rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
513 /* name is found, get the object */
514 dto = ls_locate(env, dt2ls_dev(los->los_dev),
515 &dti->dti_fid, NULL);
516 } else if (rc != -ENOENT) {
519 rc = local_object_fid_generate(env, los, &dti->dti_fid);
523 /* create the object */
524 dti->dti_attr.la_valid = LA_MODE;
525 dti->dti_attr.la_mode = mode;
526 dti->dti_dof.dof_type = DFT_INDEX;
527 dti->dti_dof.u.dof_idx.di_feat = ft;
528 dto = __local_file_create(env, &dti->dti_fid, los,
529 dt2ls_dev(los->los_dev),
530 parent, name, &dti->dti_attr,
537 EXPORT_SYMBOL(local_index_find_or_create);
540 local_index_find_or_create_with_fid(const struct lu_env *env,
541 struct dt_device *dt,
542 const struct lu_fid *fid,
543 struct dt_object *parent,
544 const char *name, __u32 mode,
545 const struct dt_index_features *ft)
547 struct dt_thread_info *dti = dt_info(env);
548 struct dt_object *dto;
553 rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
555 /* name is found, get the object */
556 if (!lu_fid_eq(fid, &dti->dti_fid))
557 dto = ERR_PTR(-EINVAL);
559 dto = dt_locate(env, dt, fid);
560 } else if (rc != -ENOENT) {
563 struct ls_device *ls;
565 ls = ls_device_get(dt);
567 dto = ERR_PTR(PTR_ERR(ls));
569 /* create the object */
570 dti->dti_attr.la_valid = LA_MODE;
571 dti->dti_attr.la_mode = mode;
572 dti->dti_dof.dof_type = DFT_INDEX;
573 dti->dti_dof.u.dof_idx.di_feat = ft;
574 dto = __local_file_create(env, fid, NULL, ls, parent,
575 name, &dti->dti_attr,
577 /* ls_device_put() will finalize the ls device, we
578 * have to open the object in other device stack */
580 dti->dti_fid = dto->do_lu.lo_header->loh_fid;
581 lu_object_put_nocache(env, &dto->do_lu);
582 dto = dt_locate(env, dt, &dti->dti_fid);
584 ls_device_put(env, ls);
589 EXPORT_SYMBOL(local_index_find_or_create_with_fid);
591 static int local_object_declare_unlink(const struct lu_env *env,
592 struct dt_device *dt,
594 struct dt_object *c, const char *name,
599 rc = dt_declare_delete(env, p, (const struct dt_key *)name, th);
603 rc = dt_declare_ref_del(env, c, th);
607 return dt_declare_destroy(env, c, th);
610 int local_object_unlink(const struct lu_env *env, struct dt_device *dt,
611 struct dt_object *parent, const char *name)
613 struct dt_thread_info *dti = dt_info(env);
614 struct dt_object *dto;
620 rc = dt_lookup_dir(env, parent, name, &dti->dti_fid);
626 dto = dt_locate(env, dt, &dti->dti_fid);
627 if (unlikely(IS_ERR(dto)))
628 RETURN(PTR_ERR(dto));
630 th = dt_trans_create(env, dt);
632 GOTO(out, rc = PTR_ERR(th));
634 rc = local_object_declare_unlink(env, dt, parent, dto, name, th);
638 rc = dt_trans_start_local(env, dt, th);
642 dt_write_lock(env, dto, 0);
643 rc = dt_delete(env, parent, (struct dt_key *)name, th, BYPASS_CAPA);
647 rc = dt_ref_del(env, dto, th);
649 struct dt_insert_rec *rec = &dti->dti_dt_rec;
651 rec->rec_fid = &dti->dti_fid;
652 rec->rec_type = dto->do_lu.lo_header->loh_attr;
653 rc = dt_insert(env, parent, (const struct dt_rec *)rec,
654 (const struct dt_key *)name, th, BYPASS_CAPA, 1);
658 rc = dt_destroy(env, dto, th);
660 dt_write_unlock(env, dto);
662 dt_trans_stop(env, dt, th);
664 lu_object_put_nocache(env, &dto->do_lu);
667 EXPORT_SYMBOL(local_object_unlink);
669 struct local_oid_storage *dt_los_find(struct ls_device *ls, __u64 seq)
671 struct local_oid_storage *los, *ret = NULL;
673 list_for_each_entry(los, &ls->ls_los_list, los_list) {
674 if (los->los_seq == seq) {
675 atomic_inc(&los->los_refcount);
683 void dt_los_put(struct local_oid_storage *los)
685 if (atomic_dec_and_test(&los->los_refcount))
686 /* should never happen, only local_oid_storage_fini should
687 * drop refcount to zero */
692 /* after Lustre 2.3 release there may be old file to store last generated FID
693 * If such file exists then we have to read its content
695 static int lastid_compat_check(const struct lu_env *env, struct dt_device *dev,
696 __u64 lastid_seq, __u32 *first_oid,
697 struct ls_device *ls)
699 struct dt_thread_info *dti = dt_info(env);
700 struct dt_object *root = NULL;
701 struct los_ondisk losd;
702 struct dt_object *o = NULL;
705 rc = dt_root_get(env, dev, &dti->dti_fid);
709 root = ls_locate(env, ls, &dti->dti_fid, NULL);
711 return PTR_ERR(root);
713 /* find old last_id file */
714 snprintf(dti->dti_buf, sizeof(dti->dti_buf), "seq-"LPX64"-lastid",
716 rc = dt_lookup_dir(env, root, dti->dti_buf, &dti->dti_fid);
717 lu_object_put_nocache(env, &root->do_lu);
719 /* old llog lastid accessed by FID only */
720 if (lastid_seq != FID_SEQ_LLOG)
722 dti->dti_fid.f_seq = FID_SEQ_LLOG;
723 dti->dti_fid.f_oid = 1;
724 dti->dti_fid.f_ver = 0;
725 o = ls_locate(env, ls, &dti->dti_fid, NULL);
729 if (!dt_object_exists(o)) {
730 lu_object_put_nocache(env, &o->do_lu);
733 CDEBUG(D_INFO, "Found old llog lastid file\n");
737 CDEBUG(D_INFO, "Found old lastid file for sequence "LPX64"\n",
739 o = ls_locate(env, ls, &dti->dti_fid, NULL);
743 /* let's read seq-NNNNNN-lastid file value */
744 LASSERT(dt_object_exists(o));
746 dti->dti_lb.lb_buf = &losd;
747 dti->dti_lb.lb_len = sizeof(losd);
748 dt_read_lock(env, o, 0);
749 rc = dt_record_read(env, o, &dti->dti_lb, &dti->dti_off);
750 dt_read_unlock(env, o);
751 if (rc == 0 && le32_to_cpu(losd.lso_magic) != LOS_MAGIC) {
752 CERROR("%s: wrong content of seq-"LPX64"-lastid file, magic %x\n",
753 o->do_lu.lo_dev->ld_obd->obd_name, lastid_seq,
754 le32_to_cpu(losd.lso_magic));
757 CERROR("%s: failed to read seq-"LPX64"-lastid: rc = %d\n",
758 o->do_lu.lo_dev->ld_obd->obd_name, lastid_seq, rc);
760 lu_object_put_nocache(env, &o->do_lu);
762 *first_oid = le32_to_cpu(losd.lso_next_oid);
767 * Initialize local OID storage for required sequence.
768 * That may be needed for services that uses local files and requires
769 * dynamic OID allocation for them.
771 * Per each sequence we have an object with 'first_fid' identificator
772 * containing the counter for OIDs of locally created files with that
775 * It is used now by llog subsystem and MGS for NID tables
777 * Function gets first_fid to create counter object.
778 * All dynamic fids will be generated with the same sequence and incremented
781 * Returned local_oid_storage is in-memory representaion of OID storage
783 int local_oid_storage_init(const struct lu_env *env, struct dt_device *dev,
784 const struct lu_fid *first_fid,
785 struct local_oid_storage **los)
787 struct dt_thread_info *dti = dt_info(env);
788 struct ls_device *ls;
790 struct dt_object *o = NULL;
792 __u32 first_oid = fid_oid(first_fid);
797 ls = ls_device_get(dev);
801 mutex_lock(&ls->ls_los_mutex);
802 *los = dt_los_find(ls, fid_seq(first_fid));
806 /* not found, then create */
809 GOTO(out, rc = -ENOMEM);
811 atomic_set(&(*los)->los_refcount, 1);
812 mutex_init(&(*los)->los_id_lock);
813 (*los)->los_dev = &ls->ls_top_dev;
814 atomic_inc(&ls->ls_refcount);
815 list_add(&(*los)->los_list, &ls->ls_los_list);
817 /* Use {seq, 0, 0} to create the LAST_ID file for every
818 * sequence. OIDs start at LUSTRE_FID_INIT_OID.
820 dti->dti_fid.f_seq = fid_seq(first_fid);
821 dti->dti_fid.f_oid = LUSTRE_FID_LASTID_OID;
822 dti->dti_fid.f_ver = 0;
823 o = ls_locate(env, ls, &dti->dti_fid, NULL);
825 GOTO(out_los, rc = PTR_ERR(o));
827 if (!dt_object_exists(o)) {
828 rc = lastid_compat_check(env, dev, fid_seq(first_fid),
833 th = dt_trans_create(env, dev);
835 GOTO(out_los, rc = PTR_ERR(th));
837 dti->dti_attr.la_valid = LA_MODE | LA_TYPE;
838 dti->dti_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
839 dti->dti_dof.dof_type = dt_mode_to_dft(S_IFREG);
841 rc = dt_declare_create(env, o, &dti->dti_attr, NULL,
846 lastid = cpu_to_le64(first_oid);
849 dti->dti_lb.lb_buf = &lastid;
850 dti->dti_lb.lb_len = sizeof(lastid);
851 rc = dt_declare_record_write(env, o, &dti->dti_lb, dti->dti_off,
856 rc = dt_trans_start_local(env, dev, th);
860 dt_write_lock(env, o, 0);
861 if (dt_object_exists(o))
862 GOTO(out_lock, rc = 0);
864 rc = dt_create(env, o, &dti->dti_attr, NULL, &dti->dti_dof,
869 rc = dt_record_write(env, o, &dti->dti_lb, &dti->dti_off, th);
873 dt_write_unlock(env, o);
875 dt_trans_stop(env, dev, th);
878 dti->dti_lb.lb_buf = &lastid;
879 dti->dti_lb.lb_len = sizeof(lastid);
880 dt_read_lock(env, o, 0);
881 rc = dt_record_read(env, o, &dti->dti_lb, &dti->dti_off);
882 dt_read_unlock(env, o);
883 if (rc == 0 && le64_to_cpu(lastid) > OBIF_MAX_OID) {
884 CERROR("%s: bad oid "LPU64" is read from LAST_ID\n",
885 o->do_lu.lo_dev->ld_obd->obd_name,
886 le64_to_cpu(lastid));
892 list_del(&(*los)->los_list);
893 atomic_dec(&ls->ls_refcount);
896 if (o != NULL && !IS_ERR(o))
897 lu_object_put_nocache(env, &o->do_lu);
899 (*los)->los_seq = fid_seq(first_fid);
900 (*los)->los_last_oid = le64_to_cpu(lastid);
902 /* Read value should not be less than initial one
903 * but possible after upgrade from older fs.
904 * In this case just switch to the first_oid in memory and
905 * it will be updated on disk with first object generated */
906 if ((*los)->los_last_oid < first_oid)
907 (*los)->los_last_oid = first_oid;
910 mutex_unlock(&ls->ls_los_mutex);
911 ls_device_put(env, ls);
914 EXPORT_SYMBOL(local_oid_storage_init);
916 void local_oid_storage_fini(const struct lu_env *env,
917 struct local_oid_storage *los)
919 struct ls_device *ls;
922 LASSERT(los->los_dev);
923 ls = dt2ls_dev(los->los_dev);
925 /* Take the mutex before decreasing the reference to avoid race
926 * conditions as described in LU-4721. */
927 mutex_lock(&ls->ls_los_mutex);
928 if (!atomic_dec_and_test(&los->los_refcount)) {
929 mutex_unlock(&ls->ls_los_mutex);
934 lu_object_put_nocache(env, &los->los_obj->do_lu);
935 list_del(&los->los_list);
937 mutex_unlock(&ls->ls_los_mutex);
938 ls_device_put(env, ls);
940 EXPORT_SYMBOL(local_oid_storage_fini);