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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2014 Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/ofd/ofd_dev.c
34 * This file contains OSD API methods for OBD Filter Device (OFD),
35 * request handlers and supplemental functions to set OFD up and clean it up.
37 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
38 * Author: Mike Pershin <mike.pershin@intel.com>
39 * Author: Johann Lombardi <johann.lombardi@intel.com>
42 * The OBD Filter Device (OFD) module belongs to the Object Storage
43 * Server stack and connects the RPC oriented Unified Target (TGT)
44 * layer (see lustre/include/lu_target.h) to the storage oriented OSD
45 * layer (see lustre/doc/osd-api.txt).
53 * OFD implements the LU and OBD device APIs and is responsible for:
55 * - Handling client requests (create, destroy, bulk IO, setattr,
56 * get_info, set_info, statfs) for the objects belonging to the OST
57 * (together with TGT).
59 * - Providing grant space management which allows clients to reserve
60 * disk space for data writeback. OFD tracks grants on global and
63 * - Handling object precreation requests from MDTs.
65 * - Operating the LDLM service that allows clients to maintain object
66 * data cache coherence.
69 #define DEBUG_SUBSYSTEM S_FILTER
71 #include <obd_class.h>
72 #include <lustre_param.h>
73 #include <lustre_fid.h>
74 #include <lustre_lfsck.h>
75 #include <lustre/lustre_idl.h>
76 #include <lustre_dlm.h>
77 #include <lustre_quota.h>
78 #include <lustre_nodemap.h>
80 #include "ofd_internal.h"
82 /* Slab for OFD object allocation */
83 static struct kmem_cache *ofd_object_kmem;
85 static struct lu_kmem_descr ofd_caches[] = {
87 .ckd_cache = &ofd_object_kmem,
88 .ckd_name = "ofd_obj",
89 .ckd_size = sizeof(struct ofd_object)
97 * Connect OFD to the next device in the stack.
99 * This function is used for device stack configuration and links OFD
100 * device with bottom OSD device.
102 * \param[in] env execution environment
103 * \param[in] m OFD device
104 * \param[in] next name of next device in the stack
105 * \param[out] exp export to return
107 * \retval 0 and export in \a exp if successful
108 * \retval negative value on error
110 static int ofd_connect_to_next(const struct lu_env *env, struct ofd_device *m,
111 const char *next, struct obd_export **exp)
113 struct obd_connect_data *data = NULL;
114 struct obd_device *obd;
120 GOTO(out, rc = -ENOMEM);
122 obd = class_name2obd(next);
124 CERROR("%s: can't locate next device: %s\n",
126 GOTO(out, rc = -ENOTCONN);
129 data->ocd_connect_flags = OBD_CONNECT_VERSION;
130 data->ocd_version = LUSTRE_VERSION_CODE;
132 rc = obd_connect(NULL, exp, obd, &obd->obd_uuid, data, NULL);
134 CERROR("%s: cannot connect to next dev %s: rc = %d\n",
135 ofd_name(m), next, rc);
139 m->ofd_dt_dev.dd_lu_dev.ld_site =
140 m->ofd_osd_exp->exp_obd->obd_lu_dev->ld_site;
141 LASSERT(m->ofd_dt_dev.dd_lu_dev.ld_site);
142 m->ofd_osd = lu2dt_dev(m->ofd_osd_exp->exp_obd->obd_lu_dev);
143 m->ofd_dt_dev.dd_lu_dev.ld_site->ls_top_dev = &m->ofd_dt_dev.dd_lu_dev;
152 * Initialize stack of devices.
154 * This function initializes OFD-OSD device stack to serve OST requests
156 * \param[in] env execution environment
157 * \param[in] m OFD device
158 * \param[in] cfg Lustre config for this server
160 * \retval 0 if successful
161 * \retval negative value on error
163 static int ofd_stack_init(const struct lu_env *env,
164 struct ofd_device *m, struct lustre_cfg *cfg)
166 const char *dev = lustre_cfg_string(cfg, 0);
168 struct ofd_thread_info *info = ofd_info(env);
169 struct lustre_mount_info *lmi;
175 lmi = server_get_mount(dev);
177 CERROR("Cannot get mount info for %s!\n", dev);
181 /* find bottom osd */
182 OBD_ALLOC(osdname, MTI_NAME_MAXLEN);
186 snprintf(osdname, MTI_NAME_MAXLEN, "%s-osd", dev);
187 rc = ofd_connect_to_next(env, m, osdname, &m->ofd_osd_exp);
188 OBD_FREE(osdname, MTI_NAME_MAXLEN);
192 d = m->ofd_osd_exp->exp_obd->obd_lu_dev;
194 m->ofd_osd = lu2dt_dev(d);
196 snprintf(info->fti_u.name, sizeof(info->fti_u.name),
197 "%s-osd", lustre_cfg_string(cfg, 0));
203 * Finalize the device stack OFD-OSD.
205 * This function cleans OFD-OSD device stack and
206 * disconnects OFD from the OSD.
208 * \param[in] env execution environment
209 * \param[in] m OFD device
210 * \param[in] top top device of stack
212 * \retval 0 if successful
213 * \retval negative value on error
215 static void ofd_stack_fini(const struct lu_env *env, struct ofd_device *m,
216 struct lu_device *top)
218 struct obd_device *obd = ofd_obd(m);
219 struct lustre_cfg_bufs bufs;
220 struct lustre_cfg *lcfg;
225 lu_site_purge(env, top->ld_site, ~0);
226 /* process cleanup, pass mdt obd name to get obd umount flags */
227 lustre_cfg_bufs_reset(&bufs, obd->obd_name);
232 lustre_cfg_bufs_set_string(&bufs, 1, flags);
233 lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
238 top->ld_ops->ldo_process_config(env, top, lcfg);
239 lustre_cfg_free(lcfg);
241 lu_site_purge(env, top->ld_site, ~0);
242 if (!cfs_hash_is_empty(top->ld_site->ls_obj_hash)) {
243 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
244 lu_site_print(env, top->ld_site, &msgdata, lu_cdebug_printer);
247 LASSERT(m->ofd_osd_exp);
248 obd_disconnect(m->ofd_osd_exp);
253 /* For interoperability, see mdt_interop_param[]. */
254 static struct cfg_interop_param ofd_interop_param[] = {
255 { "ost.quota_type", NULL },
260 * Check if parameters are symlinks to the OSD.
262 * Some parameters were moved from ofd to osd and only their
263 * symlinks were kept in ofd by LU-3106. They are:
264 * -writehthrough_cache_enable
265 * -readcache_max_filesize
269 * Since they are not included by the static lprocfs var list, a pre-check
270 * is added for them to avoid "unknown param" errors. If they are matched
271 * in this check, they will be passed to the OSD directly.
273 * \param[in] param parameters to check
275 * \retval true if param is symlink to OSD param
278 static bool match_symlink_param(char *param)
283 if (class_match_param(param, PARAM_OST, ¶m) == 0) {
284 sval = strchr(param, '=');
286 paramlen = sval - param;
287 if (strncmp(param, "writethrough_cache_enable",
289 strncmp(param, "readcache_max_filesize",
291 strncmp(param, "read_cache_enable",
293 strncmp(param, "brw_stats", paramlen) == 0)
302 * Process various configuration parameters.
304 * This function is used by MGS to process specific configurations and
305 * pass them through to the next device in server stack, i.e. the OSD.
307 * \param[in] env execution environment
308 * \param[in] d LU device of OFD
309 * \param[in] cfg parameters to process
311 * \retval 0 if successful
312 * \retval negative value on error
314 static int ofd_process_config(const struct lu_env *env, struct lu_device *d,
315 struct lustre_cfg *cfg)
317 struct ofd_device *m = ofd_dev(d);
318 struct dt_device *dt_next = m->ofd_osd;
319 struct lu_device *next = &dt_next->dd_lu_dev;
324 switch (cfg->lcfg_command) {
326 struct obd_device *obd = ofd_obd(m);
327 /* For interoperability */
328 struct cfg_interop_param *ptr = NULL;
329 struct lustre_cfg *old_cfg = NULL;
332 param = lustre_cfg_string(cfg, 1);
334 CERROR("param is empty\n");
339 ptr = class_find_old_param(param, ofd_interop_param);
341 if (ptr->new_param == NULL) {
343 CWARN("For interoperability, skip this %s."
344 " It is obsolete.\n", ptr->old_param);
348 CWARN("Found old param %s, changed it to %s.\n",
349 ptr->old_param, ptr->new_param);
352 cfg = lustre_cfg_rename(old_cfg, ptr->new_param);
359 if (match_symlink_param(param)) {
360 rc = next->ld_ops->ldo_process_config(env, next, cfg);
364 rc = class_process_proc_param(PARAM_OST, obd->obd_vars, cfg,
366 if (rc > 0 || rc == -ENOSYS) {
367 CDEBUG(D_CONFIG, "pass param %s down the stack.\n",
369 /* we don't understand; pass it on */
370 rc = next->ld_ops->ldo_process_config(env, next, cfg);
374 case LCFG_SPTLRPC_CONF: {
379 /* others are passed further */
380 rc = next->ld_ops->ldo_process_config(env, next, cfg);
387 * Implementation of lu_object_operations::loo_object_init for OFD
389 * Allocate just the next object (OSD) in stack.
391 * \param[in] env execution environment
392 * \param[in] o lu_object of OFD object
393 * \param[in] conf additional configuration parameters, not used here
395 * \retval 0 if successful
396 * \retval negative value on error
398 static int ofd_object_init(const struct lu_env *env, struct lu_object *o,
399 const struct lu_object_conf *conf)
401 struct ofd_device *d = ofd_dev(o->lo_dev);
402 struct lu_device *under;
403 struct lu_object *below;
408 CDEBUG(D_INFO, "object init, fid = "DFID"\n",
409 PFID(lu_object_fid(o)));
411 under = &d->ofd_osd->dd_lu_dev;
412 below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
414 lu_object_add(o, below);
422 * Implementation of lu_object_operations::loo_object_free.
424 * Finish OFD object lifecycle and free its memory.
426 * \param[in] env execution environment
427 * \param[in] o LU object of OFD object
429 static void ofd_object_free(const struct lu_env *env, struct lu_object *o)
431 struct ofd_object *of = ofd_obj(o);
432 struct lu_object_header *h;
437 CDEBUG(D_INFO, "object free, fid = "DFID"\n",
438 PFID(lu_object_fid(o)));
441 lu_object_header_fini(h);
442 OBD_SLAB_FREE_PTR(of, ofd_object_kmem);
447 * Implementation of lu_object_operations::loo_object_print.
449 * Print OFD part of compound OFD-OSD object. See lu_object_print() and
450 * LU_OBJECT_DEBUG() for more details about the compound object printing.
452 * \param[in] env execution environment
453 * \param[in] cookie opaque data passed to the printer function
454 * \param[in] p printer function to use
455 * \param[in] o LU object of OFD object
457 * \retval 0 if successful
458 * \retval negative value on error
460 static int ofd_object_print(const struct lu_env *env, void *cookie,
461 lu_printer_t p, const struct lu_object *o)
463 return (*p)(env, cookie, LUSTRE_OST_NAME"-object@%p", o);
466 static struct lu_object_operations ofd_obj_ops = {
467 .loo_object_init = ofd_object_init,
468 .loo_object_free = ofd_object_free,
469 .loo_object_print = ofd_object_print
473 * Implementation of lu_device_operations::lod_object_alloc.
475 * This function allocates OFD part of compound OFD-OSD object and
476 * initializes its header, because OFD is the top device in stack
478 * \param[in] env execution environment
479 * \param[in] hdr object header, NULL for OFD
480 * \param[in] d lu_device
482 * \retval allocated object if successful
483 * \retval NULL value on failed allocation
485 static struct lu_object *ofd_object_alloc(const struct lu_env *env,
486 const struct lu_object_header *hdr,
489 struct ofd_object *of;
493 OBD_SLAB_ALLOC_PTR_GFP(of, ofd_object_kmem, GFP_NOFS);
496 struct lu_object_header *h;
498 o = &of->ofo_obj.do_lu;
500 lu_object_header_init(h);
501 lu_object_init(o, h, d);
502 lu_object_add_top(h, o);
503 o->lo_ops = &ofd_obj_ops;
511 * Return the result of LFSCK run to the OFD.
513 * Notify OFD about result of LFSCK run. That may block the new object
514 * creation until problem is fixed by LFSCK.
516 * \param[in] env execution environment
517 * \param[in] data pointer to the OFD device
518 * \param[in] event LFSCK event type
520 * \retval 0 if successful
521 * \retval negative value on unknown event
523 static int ofd_lfsck_out_notify(const struct lu_env *env, void *data,
524 enum lfsck_events event)
526 struct ofd_device *ofd = data;
527 struct obd_device *obd = ofd_obd(ofd);
530 case LE_LASTID_REBUILDING:
531 CWARN("%s: Found crashed LAST_ID, deny creating new OST-object "
532 "on the device until the LAST_ID rebuilt successfully.\n",
534 down_write(&ofd->ofd_lastid_rwsem);
535 ofd->ofd_lastid_rebuilding = 1;
536 up_write(&ofd->ofd_lastid_rwsem);
538 case LE_LASTID_REBUILT: {
539 down_write(&ofd->ofd_lastid_rwsem);
540 ofd_seqs_free(env, ofd);
541 ofd->ofd_lastid_rebuilding = 0;
542 ofd->ofd_lastid_gen++;
543 up_write(&ofd->ofd_lastid_rwsem);
544 CWARN("%s: Rebuilt crashed LAST_ID files successfully.\n",
549 CERROR("%s: unknown lfsck event: rc = %d\n",
550 ofd_name(ofd), event);
558 * Implementation of lu_device_operations::ldo_prepare.
560 * This method is called after layer has been initialized and before it starts
561 * serving user requests. In OFD it starts lfsk check routines and initializes
564 * \param[in] env execution environment
565 * \param[in] pdev higher device in stack, NULL for OFD
566 * \param[in] dev lu_device of OFD device
568 * \retval 0 if successful
569 * \retval negative value on error
571 static int ofd_prepare(const struct lu_env *env, struct lu_device *pdev,
572 struct lu_device *dev)
574 struct ofd_thread_info *info;
575 struct ofd_device *ofd = ofd_dev(dev);
576 struct obd_device *obd = ofd_obd(ofd);
577 struct lu_device *next = &ofd->ofd_osd->dd_lu_dev;
582 info = ofd_info_init(env, NULL);
586 /* initialize lower device */
587 rc = next->ld_ops->ldo_prepare(env, dev, next);
591 rc = lfsck_register(env, ofd->ofd_osd, ofd->ofd_osd, obd,
592 ofd_lfsck_out_notify, ofd, false);
594 CERROR("%s: failed to initialize lfsck: rc = %d\n",
599 rc = lfsck_register_namespace(env, ofd->ofd_osd, ofd->ofd_namespace);
600 /* The LFSCK instance is registered just now, so it must be there when
601 * register the namespace to such instance. */
602 LASSERTF(rc == 0, "register namespace failed: rc = %d\n", rc);
604 target_recovery_init(&ofd->ofd_lut, tgt_request_handle);
605 LASSERT(obd->obd_no_conn);
606 spin_lock(&obd->obd_dev_lock);
607 obd->obd_no_conn = 0;
608 spin_unlock(&obd->obd_dev_lock);
610 if (obd->obd_recovering == 0)
611 ofd_postrecov(env, ofd);
617 * Implementation of lu_device_operations::ldo_recovery_complete.
619 * This method notifies all layers about 'recovery complete' event. That means
620 * device is in full state and consistent. An OFD calculates available grant
621 * space upon this event.
623 * \param[in] env execution environment
624 * \param[in] dev lu_device of OFD device
626 * \retval 0 if successful
627 * \retval negative value on error
629 static int ofd_recovery_complete(const struct lu_env *env,
630 struct lu_device *dev)
632 struct ofd_device *ofd = ofd_dev(dev);
633 struct lu_device *next = &ofd->ofd_osd->dd_lu_dev;
634 int rc = 0, max_precreate;
639 * Grant space for object precreation on the self export.
640 * This initial reserved space (i.e. 10MB for zfs and 280KB for ldiskfs)
641 * is enough to create 10k objects. More space is then acquired for
642 * precreation in ofd_grant_create().
644 max_precreate = OST_MAX_PRECREATE * ofd->ofd_dt_conf.ddp_inodespace / 2;
645 ofd_grant_connect(env, dev->ld_obd->obd_self_export, max_precreate,
647 rc = next->ld_ops->ldo_recovery_complete(env, next);
652 * lu_device_operations matrix for OFD device.
654 static struct lu_device_operations ofd_lu_ops = {
655 .ldo_object_alloc = ofd_object_alloc,
656 .ldo_process_config = ofd_process_config,
657 .ldo_recovery_complete = ofd_recovery_complete,
658 .ldo_prepare = ofd_prepare,
661 LPROC_SEQ_FOPS(lprocfs_nid_stats_clear);
664 * Initialize all needed procfs entries for OFD device.
666 * \param[in] ofd OFD device
668 * \retval 0 if successful
669 * \retval negative value on error
671 static int ofd_procfs_init(struct ofd_device *ofd)
673 struct obd_device *obd = ofd_obd(ofd);
674 struct proc_dir_entry *entry;
679 /* lprocfs must be setup before the ofd so state can be safely added
680 * to /proc incrementally as the ofd is setup */
681 obd->obd_vars = lprocfs_ofd_obd_vars;
682 rc = lprocfs_obd_setup(obd);
684 CERROR("%s: lprocfs_obd_setup failed: %d.\n",
689 rc = lprocfs_alloc_obd_stats(obd, LPROC_OFD_STATS_LAST);
691 CERROR("%s: lprocfs_alloc_obd_stats failed: %d.\n",
693 GOTO(obd_cleanup, rc);
696 obd->obd_uses_nid_stats = 1;
698 entry = lprocfs_register("exports", obd->obd_proc_entry, NULL, NULL);
701 CERROR("%s: error %d setting up lprocfs for %s\n",
702 obd->obd_name, rc, "exports");
703 GOTO(obd_cleanup, rc);
705 obd->obd_proc_exports_entry = entry;
707 entry = lprocfs_add_simple(obd->obd_proc_exports_entry, "clear",
708 obd, &lprocfs_nid_stats_clear_fops);
711 CERROR("%s: add proc entry 'clear' failed: %d.\n",
713 GOTO(obd_cleanup, rc);
716 ofd_stats_counter_init(obd->obd_stats);
718 rc = lprocfs_job_stats_init(obd, LPROC_OFD_STATS_LAST,
719 ofd_stats_counter_init);
721 GOTO(obd_cleanup, rc);
724 lprocfs_obd_cleanup(obd);
725 lprocfs_free_obd_stats(obd);
731 * Expose OSD statistics to OFD layer.
733 * The osd interfaces to the backend file system exposes useful data
734 * such as brw_stats and read or write cache states. This same data
735 * needs to be exposed into the obdfilter (ofd) layer to maintain
736 * backwards compatibility. This function creates the symlinks in the
737 * proc layer to enable this.
739 * \param[in] ofd OFD device
741 static void ofd_procfs_add_brw_stats_symlink(struct ofd_device *ofd)
743 struct obd_device *obd = ofd_obd(ofd);
744 struct obd_device *osd_obd = ofd->ofd_osd_exp->exp_obd;
746 if (obd->obd_proc_entry == NULL)
749 lprocfs_add_symlink("brw_stats", obd->obd_proc_entry,
750 "../../%s/%s/brw_stats",
751 osd_obd->obd_type->typ_name, obd->obd_name);
753 lprocfs_add_symlink("read_cache_enable", obd->obd_proc_entry,
754 "../../%s/%s/read_cache_enable",
755 osd_obd->obd_type->typ_name, obd->obd_name);
757 lprocfs_add_symlink("readcache_max_filesize",
759 "../../%s/%s/readcache_max_filesize",
760 osd_obd->obd_type->typ_name, obd->obd_name);
762 lprocfs_add_symlink("writethrough_cache_enable",
764 "../../%s/%s/writethrough_cache_enable",
765 osd_obd->obd_type->typ_name, obd->obd_name);
769 * Cleanup all procfs entries in OFD.
771 * \param[in] ofd OFD device
773 static void ofd_procfs_fini(struct ofd_device *ofd)
775 struct obd_device *obd = ofd_obd(ofd);
777 lprocfs_free_per_client_stats(obd);
778 lprocfs_obd_cleanup(obd);
779 lprocfs_free_obd_stats(obd);
780 lprocfs_job_stats_fini(obd);
784 * Stop SEQ/FID server on OFD.
786 * \param[in] env execution environment
787 * \param[in] ofd OFD device
789 * \retval 0 if successful
790 * \retval negative value on error
792 int ofd_fid_fini(const struct lu_env *env, struct ofd_device *ofd)
794 return seq_site_fini(env, &ofd->ofd_seq_site);
798 * Start SEQ/FID server on OFD.
800 * The SEQ/FID server on OFD is needed to allocate FIDs for new objects.
801 * It also connects to the master server to get own FID sequence (SEQ) range
802 * to this particular OFD. Typically that happens when the OST is first
803 * formatted or in the rare case that it exhausts the local sequence range.
805 * The sequence range is allocated out to the MDTs for OST object allocations,
806 * and not directly to the clients.
808 * \param[in] env execution environment
809 * \param[in] ofd OFD device
811 * \retval 0 if successful
812 * \retval negative value on error
814 int ofd_fid_init(const struct lu_env *env, struct ofd_device *ofd)
816 struct seq_server_site *ss = &ofd->ofd_seq_site;
817 struct lu_device *lu = &ofd->ofd_dt_dev.dd_lu_dev;
818 char *obd_name = ofd_name(ofd);
822 ss = &ofd->ofd_seq_site;
823 lu->ld_site->ld_seq_site = ss;
824 ss->ss_lu = lu->ld_site;
825 ss->ss_node_id = ofd->ofd_lut.lut_lsd.lsd_osd_index;
827 OBD_ALLOC_PTR(ss->ss_server_seq);
828 if (ss->ss_server_seq == NULL)
829 GOTO(out_free, rc = -ENOMEM);
831 OBD_ALLOC(name, strlen(obd_name) + 10);
833 OBD_FREE_PTR(ss->ss_server_seq);
834 ss->ss_server_seq = NULL;
835 GOTO(out_free, rc = -ENOMEM);
838 rc = seq_server_init(env, ss->ss_server_seq, ofd->ofd_osd, obd_name,
839 LUSTRE_SEQ_SERVER, ss);
841 CERROR("%s : seq server init error %d\n", obd_name, rc);
844 ss->ss_server_seq->lss_space.lsr_index = ss->ss_node_id;
846 OBD_ALLOC_PTR(ss->ss_client_seq);
847 if (ss->ss_client_seq == NULL)
848 GOTO(out_free, rc = -ENOMEM);
850 snprintf(name, strlen(obd_name) + 6, "%p-super", obd_name);
851 rc = seq_client_init(ss->ss_client_seq, NULL, LUSTRE_SEQ_DATA,
854 CERROR("%s : seq client init error %d\n", obd_name, rc);
857 OBD_FREE(name, strlen(obd_name) + 10);
860 rc = seq_server_set_cli(env, ss->ss_server_seq, ss->ss_client_seq);
864 if (ss->ss_server_seq) {
865 seq_server_fini(ss->ss_server_seq, env);
866 OBD_FREE_PTR(ss->ss_server_seq);
867 ss->ss_server_seq = NULL;
870 if (ss->ss_client_seq) {
871 seq_client_fini(ss->ss_client_seq);
872 OBD_FREE_PTR(ss->ss_client_seq);
873 ss->ss_client_seq = NULL;
877 OBD_FREE(name, strlen(obd_name) + 10);
886 * OFD request handler for OST_SET_INFO RPC.
888 * This is OFD-specific part of request handling
890 * \param[in] tsi target session environment for this request
892 * \retval 0 if successful
893 * \retval negative value on error
895 static int ofd_set_info_hdl(struct tgt_session_info *tsi)
897 struct ptlrpc_request *req = tgt_ses_req(tsi);
898 struct ost_body *body = NULL, *repbody;
899 void *key, *val = NULL;
900 int keylen, vallen, rc = 0;
901 bool is_grant_shrink;
905 key = req_capsule_client_get(tsi->tsi_pill, &RMF_SETINFO_KEY);
907 DEBUG_REQ(D_HA, req, "no set_info key");
908 RETURN(err_serious(-EFAULT));
910 keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_SETINFO_KEY,
913 val = req_capsule_client_get(tsi->tsi_pill, &RMF_SETINFO_VAL);
915 DEBUG_REQ(D_HA, req, "no set_info val");
916 RETURN(err_serious(-EFAULT));
918 vallen = req_capsule_get_size(tsi->tsi_pill, &RMF_SETINFO_VAL,
921 is_grant_shrink = KEY_IS(KEY_GRANT_SHRINK);
923 /* In this case the value is actually an RMF_OST_BODY, so we
924 * transmutate the type of this PTLRPC */
925 req_capsule_extend(tsi->tsi_pill, &RQF_OST_SET_GRANT_INFO);
927 rc = req_capsule_server_pack(tsi->tsi_pill);
931 if (is_grant_shrink) {
932 body = req_capsule_client_get(tsi->tsi_pill, &RMF_OST_BODY);
934 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
937 /** handle grant shrink, similar to a read request */
938 ofd_grant_prepare_read(tsi->tsi_env, tsi->tsi_exp,
940 } else if (KEY_IS(KEY_EVICT_BY_NID)) {
942 obd_export_evict_by_nid(tsi->tsi_exp->exp_obd, val);
944 } else if (KEY_IS(KEY_SPTLRPC_CONF)) {
945 rc = tgt_adapt_sptlrpc_conf(tsi->tsi_tgt, 0);
947 CERROR("%s: Unsupported key %s\n",
948 tgt_name(tsi->tsi_tgt), (char *)key);
951 ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SET_INFO,
958 * Get FIEMAP (FIle Extent MAPping) for object with the given FID.
960 * This function returns a list of extents which describes how a file's
961 * blocks are laid out on the disk.
963 * \param[in] env execution environment
964 * \param[in] ofd OFD device
965 * \param[in] fid FID of object
966 * \param[in] fiemap fiemap structure to fill with data
968 * \retval 0 if \a fiemap is filled with data successfully
969 * \retval negative value on error
971 int ofd_fiemap_get(const struct lu_env *env, struct ofd_device *ofd,
972 struct lu_fid *fid, struct ll_user_fiemap *fiemap)
974 struct ofd_object *fo;
977 fo = ofd_object_find(env, ofd, fid);
979 CERROR("%s: error finding object "DFID"\n",
980 ofd_name(ofd), PFID(fid));
984 ofd_read_lock(env, fo);
985 if (ofd_object_exists(fo))
986 rc = dt_fiemap_get(env, ofd_object_child(fo), fiemap);
989 ofd_read_unlock(env, fo);
990 ofd_object_put(env, fo);
994 struct locked_region {
995 struct list_head list;
996 struct lustre_handle lh;
1000 * Lock single extent and save lock handle in the list.
1002 * This is supplemental function for lock_zero_regions(). It allocates
1003 * new locked_region structure and locks it with extent lock, then adds
1004 * it to the list of all such regions.
1006 * \param[in] ns LDLM namespace
1007 * \param[in] res_id resource ID
1008 * \param[in] begin start of region
1009 * \param[in] end end of region
1010 * \param[in] locked list head of regions list
1012 * \retval 0 if successful locking
1013 * \retval negative value on error
1015 static int lock_region(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
1016 unsigned long long begin, unsigned long long end,
1017 struct list_head *locked)
1019 struct locked_region *region = NULL;
1023 LASSERT(begin <= end);
1024 OBD_ALLOC_PTR(region);
1028 rc = tgt_extent_lock(ns, res_id, begin, end, ®ion->lh,
1033 CDEBUG(D_OTHER, "ost lock [%llu,%llu], lh=%p\n", begin, end,
1035 list_add(®ion->list, locked);
1041 * Lock the sparse areas of given resource.
1043 * The locking of sparse areas will cause dirty data to be flushed back from
1044 * clients. This is used when getting the FIEMAP of an object to make sure
1045 * there is no unaccounted cached data on clients.
1047 * This function goes through \a fiemap list of extents and locks only sparse
1048 * areas between extents.
1050 * \param[in] ns LDLM namespace
1051 * \param[in] res_id resource ID
1052 * \param[in] fiemap file extents mapping on disk
1053 * \param[in] locked list head of regions list
1055 * \retval 0 if successful
1056 * \retval negative value on error
1058 static int lock_zero_regions(struct ldlm_namespace *ns,
1059 struct ldlm_res_id *res_id,
1060 struct ll_user_fiemap *fiemap,
1061 struct list_head *locked)
1063 __u64 begin = fiemap->fm_start;
1066 struct ll_fiemap_extent *fiemap_start = fiemap->fm_extents;
1070 CDEBUG(D_OTHER, "extents count %u\n", fiemap->fm_mapped_extents);
1071 for (i = 0; i < fiemap->fm_mapped_extents; i++) {
1072 if (fiemap_start[i].fe_logical > begin) {
1073 CDEBUG(D_OTHER, "ost lock [%llu,%llu]\n",
1074 begin, fiemap_start[i].fe_logical);
1075 rc = lock_region(ns, res_id, begin,
1076 fiemap_start[i].fe_logical, locked);
1081 begin = fiemap_start[i].fe_logical + fiemap_start[i].fe_length;
1084 if (begin < (fiemap->fm_start + fiemap->fm_length)) {
1085 CDEBUG(D_OTHER, "ost lock [%llu,%llu]\n",
1086 begin, fiemap->fm_start + fiemap->fm_length);
1087 rc = lock_region(ns, res_id, begin,
1088 fiemap->fm_start + fiemap->fm_length, locked);
1095 * Unlock all previously locked sparse areas for given resource.
1097 * This function goes through list of locked regions, unlocking and freeing
1100 * \param[in] ns LDLM namespace
1101 * \param[in] locked list head of regions list
1104 unlock_zero_regions(struct ldlm_namespace *ns, struct list_head *locked)
1106 struct locked_region *entry, *temp;
1108 list_for_each_entry_safe(entry, temp, locked, list) {
1109 CDEBUG(D_OTHER, "ost unlock lh=%p\n", &entry->lh);
1110 tgt_extent_unlock(&entry->lh, LCK_PR);
1111 list_del(&entry->list);
1112 OBD_FREE_PTR(entry);
1117 * OFD request handler for OST_GET_INFO RPC.
1119 * This is OFD-specific part of request handling. The OFD-specific keys are:
1120 * - KEY_LAST_ID (obsolete)
1124 * This function reads needed data from storage and fills reply with it.
1126 * Note: the KEY_LAST_ID is obsolete, replaced by KEY_LAST_FID on newer MDTs,
1127 * and is kept for compatibility.
1129 * \param[in] tsi target session environment for this request
1131 * \retval 0 if successful
1132 * \retval negative value on error
1134 static int ofd_get_info_hdl(struct tgt_session_info *tsi)
1136 struct obd_export *exp = tsi->tsi_exp;
1137 struct ofd_device *ofd = ofd_exp(exp);
1138 struct ofd_thread_info *fti = tsi2ofd_info(tsi);
1141 int replylen, rc = 0;
1145 /* this common part for get_info rpc */
1146 key = req_capsule_client_get(tsi->tsi_pill, &RMF_GETINFO_KEY);
1148 DEBUG_REQ(D_HA, tgt_ses_req(tsi), "no get_info key");
1149 RETURN(err_serious(-EPROTO));
1151 keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_GETINFO_KEY,
1154 if (KEY_IS(KEY_LAST_ID)) {
1156 struct ofd_seq *oseq;
1158 req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_LAST_ID);
1159 rc = req_capsule_server_pack(tsi->tsi_pill);
1161 RETURN(err_serious(rc));
1163 last_id = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_ID);
1165 oseq = ofd_seq_load(tsi->tsi_env, ofd,
1166 (u64)exp->exp_filter_data.fed_group);
1170 *last_id = ofd_seq_last_oid(oseq);
1171 ofd_seq_put(tsi->tsi_env, oseq);
1172 } else if (KEY_IS(KEY_FIEMAP)) {
1173 struct ll_fiemap_info_key *fm_key;
1174 struct ll_user_fiemap *fiemap;
1177 req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_FIEMAP);
1179 fm_key = req_capsule_client_get(tsi->tsi_pill, &RMF_FIEMAP_KEY);
1180 rc = tgt_validate_obdo(tsi, &fm_key->oa);
1182 RETURN(err_serious(rc));
1184 fid = &fm_key->oa.o_oi.oi_fid;
1186 CDEBUG(D_INODE, "get FIEMAP of object "DFID"\n", PFID(fid));
1188 replylen = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
1189 req_capsule_set_size(tsi->tsi_pill, &RMF_FIEMAP_VAL,
1190 RCL_SERVER, replylen);
1192 rc = req_capsule_server_pack(tsi->tsi_pill);
1194 RETURN(err_serious(rc));
1196 fiemap = req_capsule_server_get(tsi->tsi_pill, &RMF_FIEMAP_VAL);
1200 *fiemap = fm_key->fiemap;
1201 rc = ofd_fiemap_get(tsi->tsi_env, ofd, fid, fiemap);
1203 /* LU-3219: Lock the sparse areas to make sure dirty
1204 * flushed back from client, then call fiemap again. */
1205 if (fm_key->oa.o_valid & OBD_MD_FLFLAGS &&
1206 fm_key->oa.o_flags & OBD_FL_SRVLOCK) {
1207 struct list_head locked;
1209 INIT_LIST_HEAD(&locked);
1210 ost_fid_build_resid(fid, &fti->fti_resid);
1211 rc = lock_zero_regions(ofd->ofd_namespace,
1212 &fti->fti_resid, fiemap,
1214 if (rc == 0 && !list_empty(&locked)) {
1215 rc = ofd_fiemap_get(tsi->tsi_env, ofd, fid,
1217 unlock_zero_regions(ofd->ofd_namespace,
1221 } else if (KEY_IS(KEY_LAST_FID)) {
1222 struct ofd_device *ofd = ofd_exp(exp);
1223 struct ofd_seq *oseq;
1227 req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_LAST_FID);
1228 rc = req_capsule_server_pack(tsi->tsi_pill);
1230 RETURN(err_serious(rc));
1232 fid = req_capsule_client_get(tsi->tsi_pill, &RMF_FID);
1234 RETURN(err_serious(-EPROTO));
1236 fid_le_to_cpu(&fti->fti_ostid.oi_fid, fid);
1238 fid = req_capsule_server_get(tsi->tsi_pill, &RMF_FID);
1242 oseq = ofd_seq_load(tsi->tsi_env, ofd,
1243 ostid_seq(&fti->fti_ostid));
1245 RETURN(PTR_ERR(oseq));
1247 rc = ostid_to_fid(fid, &oseq->os_oi,
1248 ofd->ofd_lut.lut_lsd.lsd_osd_index);
1252 CDEBUG(D_HA, "%s: LAST FID is "DFID"\n", ofd_name(ofd),
1255 ofd_seq_put(tsi->tsi_env, oseq);
1257 CERROR("%s: not supported key %s\n", tgt_name(tsi->tsi_tgt),
1261 ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_GET_INFO,
1268 * OFD request handler for OST_GETATTR RPC.
1270 * This is OFD-specific part of request handling. It finds the OFD object
1271 * by its FID, gets attributes from storage and packs result to the reply.
1273 * \param[in] tsi target session environment for this request
1275 * \retval 0 if successful
1276 * \retval negative value on error
1278 static int ofd_getattr_hdl(struct tgt_session_info *tsi)
1280 struct ofd_thread_info *fti = tsi2ofd_info(tsi);
1281 struct ofd_device *ofd = ofd_exp(tsi->tsi_exp);
1282 struct ost_body *repbody;
1283 struct lustre_handle lh = { 0 };
1284 struct ofd_object *fo;
1286 ldlm_mode_t lock_mode = LCK_PR;
1291 LASSERT(tsi->tsi_ost_body != NULL);
1293 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1294 if (repbody == NULL)
1297 repbody->oa.o_oi = tsi->tsi_ost_body->oa.o_oi;
1298 repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1300 srvlock = tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
1301 tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK;
1304 if (unlikely(tsi->tsi_ost_body->oa.o_flags & OBD_FL_FLUSH))
1307 rc = tgt_extent_lock(tsi->tsi_tgt->lut_obd->obd_namespace,
1308 &tsi->tsi_resid, 0, OBD_OBJECT_EOF, &lh,
1314 fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
1316 GOTO(out, rc = PTR_ERR(fo));
1318 rc = ofd_attr_get(tsi->tsi_env, fo, &fti->fti_attr);
1322 obdo_from_la(&repbody->oa, &fti->fti_attr,
1323 OFD_VALID_FLAGS | LA_UID | LA_GID);
1324 tgt_drop_id(tsi->tsi_exp, &repbody->oa);
1326 /* Store object version in reply */
1327 curr_version = dt_version_get(tsi->tsi_env,
1328 ofd_object_child(fo));
1329 if ((__s64)curr_version != -EOPNOTSUPP) {
1330 repbody->oa.o_valid |= OBD_MD_FLDATAVERSION;
1331 repbody->oa.o_data_version = curr_version;
1335 ofd_object_put(tsi->tsi_env, fo);
1338 tgt_extent_unlock(&lh, lock_mode);
1340 ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_GETATTR,
1343 repbody->oa.o_valid |= OBD_MD_FLFLAGS;
1344 repbody->oa.o_flags = OBD_FL_FLUSH;
1350 * OFD request handler for OST_SETATTR RPC.
1352 * This is OFD-specific part of request handling. It finds the OFD object
1353 * by its FID, sets attributes from request and packs result to the reply.
1355 * \param[in] tsi target session environment for this request
1357 * \retval 0 if successful
1358 * \retval negative value on error
1360 static int ofd_setattr_hdl(struct tgt_session_info *tsi)
1362 struct ofd_thread_info *fti = tsi2ofd_info(tsi);
1363 struct ofd_device *ofd = ofd_exp(tsi->tsi_exp);
1364 struct ost_body *body = tsi->tsi_ost_body;
1365 struct ost_body *repbody;
1366 struct ldlm_resource *res;
1367 struct ofd_object *fo;
1368 struct filter_fid *ff = NULL;
1373 LASSERT(body != NULL);
1375 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1376 if (repbody == NULL)
1379 repbody->oa.o_oi = body->oa.o_oi;
1380 repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1382 /* This would be very bad - accidentally truncating a file when
1383 * changing the time or similar - bug 12203. */
1384 if (body->oa.o_valid & OBD_MD_FLSIZE &&
1385 body->oa.o_size != OBD_OBJECT_EOF) {
1386 static char mdsinum[48];
1388 if (body->oa.o_valid & OBD_MD_FLFID)
1389 snprintf(mdsinum, sizeof(mdsinum) - 1,
1390 "of parent "DFID, body->oa.o_parent_seq,
1391 body->oa.o_parent_oid, 0);
1395 CERROR("%s: setattr from %s is trying to truncate object "DFID
1396 " %s\n", ofd_name(ofd), obd_export_nid2str(tsi->tsi_exp),
1397 PFID(&tsi->tsi_fid), mdsinum);
1401 fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
1403 GOTO(out, rc = PTR_ERR(fo));
1405 la_from_obdo(&fti->fti_attr, &body->oa, body->oa.o_valid);
1406 fti->fti_attr.la_valid &= ~LA_TYPE;
1408 if (body->oa.o_valid & OBD_MD_FLFID) {
1409 ff = &fti->fti_mds_fid;
1410 ofd_prepare_fidea(ff, &body->oa);
1413 /* setting objects attributes (including owner/group) */
1414 rc = ofd_attr_set(tsi->tsi_env, fo, &fti->fti_attr, ff);
1418 obdo_from_la(&repbody->oa, &fti->fti_attr,
1419 OFD_VALID_FLAGS | LA_UID | LA_GID);
1420 tgt_drop_id(tsi->tsi_exp, &repbody->oa);
1422 ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SETATTR,
1426 ofd_object_put(tsi->tsi_env, fo);
1429 /* we do not call this before to avoid lu_object_find() in
1430 * ->lvbo_update() holding another reference on the object.
1431 * otherwise concurrent destroy can make the object unavailable
1432 * for 2nd lu_object_find() waiting for the first reference
1433 * to go... deadlock! */
1434 res = ldlm_resource_get(ofd->ofd_namespace, NULL,
1435 &tsi->tsi_resid, LDLM_EXTENT, 0);
1437 ldlm_res_lvbo_update(res, NULL, 0);
1438 ldlm_resource_putref(res);
1445 * Destroy OST orphans.
1447 * This is part of OST_CREATE RPC handling. If there is flag OBD_FL_DELORPHAN
1448 * set then we must destroy possible orphaned objects.
1450 * \param[in] env execution environment
1451 * \param[in] exp OBD export
1452 * \param[in] ofd OFD device
1453 * \param[in] oa obdo structure for reply
1455 * \retval 0 if successful
1456 * \retval negative value on error
1458 static int ofd_orphans_destroy(const struct lu_env *env,
1459 struct obd_export *exp,
1460 struct ofd_device *ofd, struct obdo *oa)
1462 struct ofd_thread_info *info = ofd_info(env);
1463 struct lu_fid *fid = &info->fti_fid;
1464 struct ost_id *oi = &oa->o_oi;
1465 struct ofd_seq *oseq;
1466 u64 seq = ostid_seq(oi);
1467 u64 end_id = ostid_id(oi);
1475 oseq = ofd_seq_get(ofd, seq);
1477 CERROR("%s: Can not find seq for "DOSTID"\n",
1478 ofd_name(ofd), POSTID(oi));
1483 last = ofd_seq_last_oid(oseq);
1486 LASSERT(exp != NULL);
1487 skip_orphan = !!(exp_connect_flags(exp) & OBD_CONNECT_SKIP_ORPHAN);
1489 if (OBD_FAIL_CHECK(OBD_FAIL_OST_NODESTROY))
1492 LCONSOLE(D_INFO, "%s: deleting orphan objects from "DOSTID
1493 " to "DOSTID"\n", ofd_name(ofd), seq, end_id + 1, seq, last);
1495 while (oid > end_id) {
1496 rc = fid_set_id(fid, oid);
1497 if (unlikely(rc != 0))
1500 rc = ofd_destroy_by_fid(env, ofd, fid, 1);
1501 if (rc != 0 && rc != -ENOENT && rc != -ESTALE &&
1502 likely(rc != -EREMCHG && rc != -EINPROGRESS))
1503 /* this is pretty fatal... */
1504 CEMERG("%s: error destroying precreated id "
1506 ofd_name(ofd), PFID(fid), rc);
1510 ofd_seq_last_oid_set(oseq, oid);
1511 /* update last_id on disk periodically so that if we
1512 * restart * we don't need to re-scan all of the just
1513 * deleted objects. */
1514 if ((oid & 511) == 0)
1515 ofd_seq_last_oid_write(env, ofd, oseq);
1519 CDEBUG(D_HA, "%s: after destroy: set last_id to "DOSTID"\n",
1520 ofd_name(ofd), seq, oid);
1524 ofd_seq_last_oid_set(oseq, oid);
1525 rc = ofd_seq_last_oid_write(env, ofd, oseq);
1527 /* don't reuse orphan object, return last used objid */
1528 ostid_set_id(oi, last);
1535 ofd_seq_put(env, oseq);
1540 * OFD request handler for OST_CREATE RPC.
1542 * This is OFD-specific part of request handling. Its main purpose is to
1543 * create new data objects on OST, but it also used to destroy orphans.
1545 * \param[in] tsi target session environment for this request
1547 * \retval 0 if successful
1548 * \retval negative value on error
1550 static int ofd_create_hdl(struct tgt_session_info *tsi)
1552 struct ptlrpc_request *req = tgt_ses_req(tsi);
1553 struct ost_body *repbody;
1554 const struct obdo *oa = &tsi->tsi_ost_body->oa;
1555 struct obdo *rep_oa;
1556 struct obd_export *exp = tsi->tsi_exp;
1557 struct ofd_device *ofd = ofd_exp(exp);
1558 u64 seq = ostid_seq(&oa->o_oi);
1559 u64 oid = ostid_id(&oa->o_oi);
1560 struct ofd_seq *oseq;
1566 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
1569 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1570 if (repbody == NULL)
1573 down_read(&ofd->ofd_lastid_rwsem);
1574 /* Currently, for safe, we do not distinguish which LAST_ID is broken,
1575 * we may do that in the future.
1576 * Return -ENOSPC until the LAST_ID rebuilt. */
1577 if (unlikely(ofd->ofd_lastid_rebuilding))
1578 GOTO(out_sem, rc = -ENOSPC);
1580 rep_oa = &repbody->oa;
1581 rep_oa->o_oi = oa->o_oi;
1583 LASSERT(seq >= FID_SEQ_OST_MDT0);
1584 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
1586 CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi));
1588 oseq = ofd_seq_load(tsi->tsi_env, ofd, seq);
1590 CERROR("%s: Can't find FID Sequence "LPX64": rc = %ld\n",
1591 ofd_name(ofd), seq, PTR_ERR(oseq));
1592 GOTO(out_sem, rc = -EINVAL);
1595 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
1596 (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1597 if (!ofd_obd(ofd)->obd_recovering ||
1598 oid > ofd_seq_last_oid(oseq)) {
1599 CERROR("%s: recreate objid "DOSTID" > last id "LPU64
1600 "\n", ofd_name(ofd), POSTID(&oa->o_oi),
1601 ofd_seq_last_oid(oseq));
1602 GOTO(out_nolock, rc = -EINVAL);
1604 /* Do nothing here, we re-create objects during recovery
1605 * upon write replay, see ofd_preprw_write() */
1606 GOTO(out_nolock, rc = 0);
1608 /* former ofd_handle_precreate */
1609 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
1610 (oa->o_flags & OBD_FL_DELORPHAN)) {
1611 exp->exp_filter_data.fed_lastid_gen = ofd->ofd_lastid_gen;
1613 /* destroy orphans */
1614 if (lustre_msg_get_conn_cnt(tgt_ses_req(tsi)->rq_reqmsg) <
1615 exp->exp_conn_cnt) {
1616 CERROR("%s: dropping old orphan cleanup request\n",
1618 GOTO(out_nolock, rc = 0);
1620 /* This causes inflight precreates to abort and drop lock */
1621 oseq->os_destroys_in_progress = 1;
1622 mutex_lock(&oseq->os_create_lock);
1623 if (!oseq->os_destroys_in_progress) {
1624 CERROR("%s:["LPU64"] destroys_in_progress already"
1625 " cleared\n", ofd_name(ofd), seq);
1626 ostid_set_id(&rep_oa->o_oi, ofd_seq_last_oid(oseq));
1629 diff = oid - ofd_seq_last_oid(oseq);
1630 CDEBUG(D_HA, "ofd_last_id() = "LPU64" -> diff = %d\n",
1631 ofd_seq_last_oid(oseq), diff);
1632 if (-diff > OST_MAX_PRECREATE) {
1633 /* Let MDS know that we are so far ahead. */
1634 ostid_set_id(&rep_oa->o_oi, ofd_seq_last_oid(oseq) + 1);
1636 } else if (diff < 0) {
1637 rc = ofd_orphans_destroy(tsi->tsi_env, exp,
1639 oseq->os_destroys_in_progress = 0;
1641 /* XXX: Used by MDS for the first time! */
1642 oseq->os_destroys_in_progress = 0;
1645 if (unlikely(exp->exp_filter_data.fed_lastid_gen !=
1646 ofd->ofd_lastid_gen)) {
1647 /* Keep the export ref so we can send the reply. */
1648 ofd_obd_disconnect(class_export_get(exp));
1649 GOTO(out_nolock, rc = -ENOTCONN);
1652 mutex_lock(&oseq->os_create_lock);
1653 if (lustre_msg_get_conn_cnt(tgt_ses_req(tsi)->rq_reqmsg) <
1654 exp->exp_conn_cnt) {
1655 CERROR("%s: dropping old precreate request\n",
1659 /* only precreate if seq is 0, IDIF or normal and also o_id
1660 * must be specfied */
1661 if ((!fid_seq_is_mdt(seq) && !fid_seq_is_norm(seq) &&
1662 !fid_seq_is_idif(seq)) || oid == 0) {
1663 diff = 1; /* shouldn't we create this right now? */
1665 diff = oid - ofd_seq_last_oid(oseq);
1666 /* Do sync create if the seq is about to used up */
1667 if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
1668 if (unlikely(oid >= IDIF_MAX_OID - 1))
1670 } else if (fid_seq_is_norm(seq)) {
1672 LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
1675 CERROR("%s : invalid o_seq "DOSTID"\n",
1676 ofd_name(ofd), POSTID(&oa->o_oi));
1677 GOTO(out, rc = -EINVAL);
1682 CERROR("%s: invalid precreate request for "
1683 DOSTID", last_id " LPU64 ". "
1684 "Likely MDS last_id corruption\n",
1685 ofd_name(ofd), POSTID(&oa->o_oi),
1686 ofd_seq_last_oid(oseq));
1687 GOTO(out, rc = -EINVAL);
1692 cfs_time_t enough_time = cfs_time_shift(DISK_TIMEOUT);
1697 if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
1698 !(oa->o_flags & OBD_FL_DELORPHAN)) {
1699 /* don't enforce grant during orphan recovery */
1700 rc = ofd_grant_create(tsi->tsi_env,
1701 ofd_obd(ofd)->obd_self_export,
1704 CDEBUG(D_HA, "%s: failed to acquire grant "
1705 "space for precreate (%d): rc = %d\n",
1706 ofd_name(ofd), diff, rc);
1711 /* This can happen if a new OST is formatted and installed
1712 * in place of an old one at the same index. Instead of
1713 * precreating potentially millions of deleted old objects
1714 * (possibly filling the OST), only precreate the last batch.
1715 * LFSCK will eventually clean up any orphans. LU-14 */
1716 if (diff > 5 * OST_MAX_PRECREATE) {
1717 diff = OST_MAX_PRECREATE / 2;
1718 LCONSOLE_WARN("%s: precreate FID "DOSTID" is over %u "
1719 "larger than the LAST_ID "DOSTID", only "
1720 "precreating the last %u objects.\n",
1721 ofd_name(ofd), POSTID(&oa->o_oi),
1722 5 * OST_MAX_PRECREATE,
1723 POSTID(&oseq->os_oi), diff);
1724 ofd_seq_last_oid_set(oseq, ostid_id(&oa->o_oi) - diff);
1728 next_id = ofd_seq_last_oid(oseq) + 1;
1729 count = ofd_precreate_batch(ofd, diff);
1731 CDEBUG(D_HA, "%s: reserve %d objects in group "LPX64
1732 " at "LPU64"\n", ofd_name(ofd),
1733 count, seq, next_id);
1735 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1736 && cfs_time_after(jiffies, enough_time)) {
1737 CDEBUG(D_HA, "%s: Slow creates, %d/%d objects"
1738 " created at a rate of %d/s\n",
1739 ofd_name(ofd), created, diff + created,
1740 created / DISK_TIMEOUT);
1744 rc = ofd_precreate_objects(tsi->tsi_env, ofd, next_id,
1745 oseq, count, sync_trans);
1749 } else if (rc < 0) {
1755 lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1756 LCONSOLE_WARN("%s: can't create the same count of"
1757 " objects when replaying the request"
1758 " (diff is %d). see LU-4621\n",
1759 ofd_name(ofd), diff);
1762 /* some objects got created, we can return
1763 * them, even if last creation failed */
1766 CERROR("%s: unable to precreate: rc = %d\n",
1769 if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
1770 !(oa->o_flags & OBD_FL_DELORPHAN))
1771 ofd_grant_commit(tsi->tsi_env,
1772 ofd_obd(ofd)->obd_self_export, rc);
1774 ostid_set_id(&rep_oa->o_oi, ofd_seq_last_oid(oseq));
1777 ofd_counter_incr(exp, LPROC_OFD_STATS_CREATE,
1780 mutex_unlock(&oseq->os_create_lock);
1783 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 8, 53, 0)
1784 struct ofd_thread_info *info = ofd_info(tsi->tsi_env);
1785 struct lu_fid *fid = &info->fti_fid;
1787 /* For compatible purpose, it needs to convert back to
1788 * OST ID before put it on wire. */
1789 *fid = rep_oa->o_oi.oi_fid;
1790 fid_to_ostid(fid, &rep_oa->o_oi);
1792 rep_oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
1794 ofd_seq_put(tsi->tsi_env, oseq);
1797 up_read(&ofd->ofd_lastid_rwsem);
1802 * OFD request handler for OST_DESTROY RPC.
1804 * This is OFD-specific part of request handling. It destroys data objects
1805 * related to destroyed object on MDT.
1807 * \param[in] tsi target session environment for this request
1809 * \retval 0 if successful
1810 * \retval negative value on error
1812 static int ofd_destroy_hdl(struct tgt_session_info *tsi)
1814 const struct ost_body *body = tsi->tsi_ost_body;
1815 struct ost_body *repbody;
1816 struct ofd_device *ofd = ofd_exp(tsi->tsi_exp);
1817 struct ofd_thread_info *fti = tsi2ofd_info(tsi);
1818 struct lu_fid *fid = &fti->fti_fid;
1825 if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
1828 /* This is old case for clients before Lustre 2.4 */
1829 /* If there's a DLM request, cancel the locks mentioned in it */
1830 if (req_capsule_field_present(tsi->tsi_pill, &RMF_DLM_REQ,
1832 struct ldlm_request *dlm;
1834 dlm = req_capsule_client_get(tsi->tsi_pill, &RMF_DLM_REQ);
1837 ldlm_request_cancel(tgt_ses_req(tsi), dlm, 0, LATF_SKIP);
1840 *fid = body->oa.o_oi.oi_fid;
1841 oid = ostid_id(&body->oa.o_oi);
1844 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1846 /* check that o_misc makes sense */
1847 if (body->oa.o_valid & OBD_MD_FLOBJCOUNT)
1848 count = body->oa.o_misc;
1850 count = 1; /* default case - single destroy */
1852 CDEBUG(D_HA, "%s: Destroy object "DOSTID" count %d\n", ofd_name(ofd),
1853 POSTID(&body->oa.o_oi), count);
1858 lrc = ofd_destroy_by_fid(tsi->tsi_env, ofd, fid, 0);
1859 if (lrc == -ENOENT) {
1861 "%s: destroying non-existent object "DFID"\n",
1862 ofd_name(ofd), PFID(fid));
1863 /* rewrite rc with -ENOENT only if it is 0 */
1866 } else if (lrc != 0) {
1867 CERROR("%s: error destroying object "DFID": %d\n",
1868 ofd_name(ofd), PFID(fid), lrc);
1874 lrc = fid_set_id(fid, oid);
1875 if (unlikely(lrc != 0 && count > 0))
1876 GOTO(out, rc = lrc);
1879 ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_DESTROY,
1885 fid_to_ostid(fid, &repbody->oa.o_oi);
1890 * OFD request handler for OST_STATFS RPC.
1892 * This function gets statfs data from storage as part of request
1895 * \param[in] tsi target session environment for this request
1897 * \retval 0 if successful
1898 * \retval negative value on error
1900 static int ofd_statfs_hdl(struct tgt_session_info *tsi)
1902 struct obd_statfs *osfs;
1907 osfs = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_STATFS);
1909 rc = ofd_statfs(tsi->tsi_env, tsi->tsi_exp, osfs,
1910 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0);
1912 CERROR("%s: statfs failed: rc = %d\n",
1913 tgt_name(tsi->tsi_tgt), rc);
1915 if (OBD_FAIL_CHECK(OBD_FAIL_OST_STATFS_EINPROGRESS))
1918 ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_STATFS,
1925 * OFD request handler for OST_SYNC RPC.
1927 * Sync object data or all filesystem data to the disk and pack the
1930 * \param[in] tsi target session environment for this request
1932 * \retval 0 if successful
1933 * \retval negative value on error
1935 static int ofd_sync_hdl(struct tgt_session_info *tsi)
1937 struct ost_body *body = tsi->tsi_ost_body;
1938 struct ost_body *repbody;
1939 struct ofd_thread_info *fti = tsi2ofd_info(tsi);
1940 struct ofd_device *ofd = ofd_exp(tsi->tsi_exp);
1941 struct ofd_object *fo = NULL;
1946 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1948 /* if no objid is specified, it means "sync whole filesystem" */
1949 if (!fid_is_zero(&tsi->tsi_fid)) {
1950 fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
1952 RETURN(PTR_ERR(fo));
1955 rc = tgt_sync(tsi->tsi_env, tsi->tsi_tgt,
1956 fo != NULL ? ofd_object_child(fo) : NULL,
1957 repbody->oa.o_size, repbody->oa.o_blocks);
1961 ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SYNC,
1966 repbody->oa.o_oi = body->oa.o_oi;
1967 repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1969 rc = ofd_attr_get(tsi->tsi_env, fo, &fti->fti_attr);
1971 obdo_from_la(&repbody->oa, &fti->fti_attr,
1974 /* don't return rc from getattr */
1979 ofd_object_put(tsi->tsi_env, fo);
1984 * OFD request handler for OST_PUNCH RPC.
1986 * This is part of request processing. Validate request fields,
1987 * punch (truncate) the given OFD object and pack reply.
1989 * \param[in] tsi target session environment for this request
1991 * \retval 0 if successful
1992 * \retval negative value on error
1994 static int ofd_punch_hdl(struct tgt_session_info *tsi)
1996 const struct obdo *oa = &tsi->tsi_ost_body->oa;
1997 struct ost_body *repbody;
1998 struct ofd_thread_info *info = tsi2ofd_info(tsi);
1999 struct ldlm_namespace *ns = tsi->tsi_tgt->lut_obd->obd_namespace;
2000 struct ldlm_resource *res;
2001 struct ofd_object *fo;
2002 struct filter_fid *ff = NULL;
2004 struct lustre_handle lh = { 0, };
2011 /* check that we do support OBD_CONNECT_TRUNCLOCK. */
2012 CLASSERT(OST_CONNECT_SUPPORTED & OBD_CONNECT_TRUNCLOCK);
2014 if ((oa->o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
2015 (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
2016 RETURN(err_serious(-EPROTO));
2018 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
2019 if (repbody == NULL)
2020 RETURN(err_serious(-ENOMEM));
2022 /* punch start,end are passed in o_size,o_blocks throught wire */
2026 if (end != OBD_OBJECT_EOF) /* Only truncate is supported */
2029 /* standard truncate optimization: if file body is completely
2030 * destroyed, don't send data back to the server. */
2032 flags |= LDLM_FL_AST_DISCARD_DATA;
2034 repbody->oa.o_oi = oa->o_oi;
2035 repbody->oa.o_valid = OBD_MD_FLID;
2037 srvlock = oa->o_valid & OBD_MD_FLFLAGS &&
2038 oa->o_flags & OBD_FL_SRVLOCK;
2041 rc = tgt_extent_lock(ns, &tsi->tsi_resid, start, end, &lh,
2047 CDEBUG(D_INODE, "calling punch for object "DFID", valid = "LPX64
2048 ", start = "LPD64", end = "LPD64"\n", PFID(&tsi->tsi_fid),
2049 oa->o_valid, start, end);
2051 fo = ofd_object_find_exists(tsi->tsi_env, ofd_exp(tsi->tsi_exp),
2054 GOTO(out, rc = PTR_ERR(fo));
2056 la_from_obdo(&info->fti_attr, oa,
2057 OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME);
2058 info->fti_attr.la_size = start;
2059 info->fti_attr.la_valid |= LA_SIZE;
2061 if (oa->o_valid & OBD_MD_FLFID) {
2062 ff = &info->fti_mds_fid;
2063 ofd_prepare_fidea(ff, oa);
2066 rc = ofd_object_punch(tsi->tsi_env, fo, start, end, &info->fti_attr,
2067 ff, (struct obdo *)oa);
2071 ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_PUNCH,
2075 ofd_object_put(tsi->tsi_env, fo);
2078 tgt_extent_unlock(&lh, LCK_PW);
2080 /* we do not call this before to avoid lu_object_find() in
2081 * ->lvbo_update() holding another reference on the object.
2082 * otherwise concurrent destroy can make the object unavailable
2083 * for 2nd lu_object_find() waiting for the first reference
2084 * to go... deadlock! */
2085 res = ldlm_resource_get(ns, NULL, &tsi->tsi_resid,
2088 ldlm_res_lvbo_update(res, NULL, 0);
2089 ldlm_resource_putref(res);
2096 * OFD request handler for OST_QUOTACTL RPC.
2098 * This is part of request processing to validate incoming request fields,
2099 * get the requested data from OSD and pack reply.
2101 * \param[in] tsi target session environment for this request
2103 * \retval 0 if successful
2104 * \retval negative value on error
2106 static int ofd_quotactl(struct tgt_session_info *tsi)
2108 struct obd_quotactl *oqctl, *repoqc;
2109 struct lu_nodemap *nodemap =
2110 tsi->tsi_exp->exp_target_data.ted_nodemap;
2116 oqctl = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_QUOTACTL);
2118 RETURN(err_serious(-EPROTO));
2120 repoqc = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_QUOTACTL);
2122 RETURN(err_serious(-ENOMEM));
2124 /* report success for quota on/off for interoperability with current MDT
2126 if (oqctl->qc_cmd == Q_QUOTAON || oqctl->qc_cmd == Q_QUOTAOFF)
2132 if (oqctl->qc_type == USRQUOTA)
2133 id = nodemap_map_id(nodemap, NODEMAP_UID,
2134 NODEMAP_CLIENT_TO_FS,
2136 else if (oqctl->qc_type == GRPQUOTA)
2137 id = nodemap_map_id(nodemap, NODEMAP_GID,
2138 NODEMAP_CLIENT_TO_FS,
2141 if (repoqc->qc_id != id)
2142 swap(repoqc->qc_id, id);
2144 rc = lquotactl_slv(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, repoqc);
2146 ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_QUOTACTL,
2149 if (repoqc->qc_id != id)
2150 swap(repoqc->qc_id, id);
2156 * Calculate the amount of time for lock prolongation.
2158 * This is helper for ofd_prolong_extent_locks() function to get
2159 * the timeout extra time.
2161 * \param[in] req current request
2163 * \retval amount of time to extend the timeout with
2165 static inline int prolong_timeout(struct ptlrpc_request *req,
2166 struct ldlm_lock *lock)
2168 struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
2171 return obd_timeout / 2;
2173 /* We are in the middle of the process - BL AST is sent, CANCEL
2174 is ahead. Take half of AT + IO process time. */
2175 return at_est2timeout(at_get(&svcpt->scp_at_estimate)) +
2176 (ldlm_bl_timeout(lock) >> 1);
2180 * Prolong single lock timeout.
2182 * This is supplemental function to the ofd_prolong_locks(). It prolongs
2185 * \param[in] tsi target session environment for this request
2186 * \param[in] lock LDLM lock to prolong
2187 * \param[in] extent related extent
2188 * \param[in] timeout timeout value to add
2190 * \retval 0 if lock is not suitable for prolongation
2191 * \retval 1 if lock was prolonged successfully
2193 static int ofd_prolong_one_lock(struct tgt_session_info *tsi,
2194 struct ldlm_lock *lock,
2195 struct ldlm_extent *extent)
2197 int timeout = prolong_timeout(tgt_ses_req(tsi), lock);
2199 if (lock->l_flags & LDLM_FL_DESTROYED) /* lock already cancelled */
2202 /* XXX: never try to grab resource lock here because we're inside
2203 * exp_bl_list_lock; in ldlm_lockd.c to handle waiting list we take
2204 * res lock and then exp_bl_list_lock. */
2206 if (!(lock->l_flags & LDLM_FL_AST_SENT))
2207 /* ignore locks not being cancelled */
2210 LDLM_DEBUG(lock, "refreshed for req x"LPU64" ext("LPU64"->"LPU64") "
2211 "to %ds.\n", tgt_ses_req(tsi)->rq_xid, extent->start,
2212 extent->end, timeout);
2214 /* OK. this is a possible lock the user holds doing I/O
2215 * let's refresh eviction timer for it */
2216 ldlm_refresh_waiting_lock(lock, timeout);
2221 * Prolong lock timeout for the given extent.
2223 * This function finds all locks related with incoming request and
2224 * prolongs their timeout.
2226 * If a client is holding a lock for a long time while it sends
2227 * read or write RPCs to the OST for the object under this lock,
2228 * then we don't want the OST to evict the client. Otherwise,
2229 * if the network or disk is very busy then the client may not
2230 * be able to make any progress to clear out dirty pages under
2231 * the lock and the application will fail.
2233 * Every time a Bulk Read/Write (BRW) request arrives for the object
2234 * covered by the lock, extend the timeout on that lock. The RPC should
2235 * contain a lock handle for the lock it is using, but this
2236 * isn't handled correctly by all client versions, and the
2237 * request may cover multiple locks.
2239 * \param[in] tsi target session environment for this request
2240 * \param[in] start start of extent
2241 * \param[in] end end of extent
2243 * \retval number of prolonged locks
2245 static int ofd_prolong_extent_locks(struct tgt_session_info *tsi,
2246 __u64 start, __u64 end)
2248 struct obd_export *exp = tsi->tsi_exp;
2249 struct obdo *oa = &tsi->tsi_ost_body->oa;
2250 struct ldlm_extent extent = {
2254 struct ldlm_lock *lock;
2259 if (oa->o_valid & OBD_MD_FLHANDLE) {
2260 /* mostly a request should be covered by only one lock, try
2262 lock = ldlm_handle2lock(&oa->o_handle);
2264 /* Fast path to check if the lock covers the whole IO
2265 * region exclusively. */
2266 if (lock->l_granted_mode == LCK_PW &&
2267 ldlm_extent_contain(&lock->l_policy_data.l_extent,
2270 LASSERT(lock->l_export == exp);
2271 lock_count = ofd_prolong_one_lock(tsi, lock,
2273 LDLM_LOCK_PUT(lock);
2276 LDLM_LOCK_PUT(lock);
2280 spin_lock_bh(&exp->exp_bl_list_lock);
2281 list_for_each_entry(lock, &exp->exp_bl_list, l_exp_list) {
2282 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
2283 LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
2285 if (!ldlm_res_eq(&tsi->tsi_resid, &lock->l_resource->lr_name))
2288 if (!ldlm_extent_overlap(&lock->l_policy_data.l_extent,
2292 lock_count += ofd_prolong_one_lock(tsi, lock, &extent);
2294 spin_unlock_bh(&exp->exp_bl_list_lock);
2300 * Implementation of ptlrpc_hpreq_ops::hpreq_lock_match for OFD RW requests.
2302 * Determine if \a lock and the lock from request \a req are equivalent
2303 * by comparing their resource names, modes, and extents.
2305 * It is used to give priority to read and write RPCs being done
2306 * under this lock so that the client can drop the contended
2307 * lock more quickly and let other clients use it. This improves
2308 * overall performance in the case where the first client gets a
2309 * very large lock extent that prevents other clients from
2310 * submitting their writes.
2312 * \param[in] req ptlrpc_request being processed
2313 * \param[in] lock contended lock to match
2315 * \retval 1 if lock is matched
2316 * \retval 0 otherwise
2318 static int ofd_rw_hpreq_lock_match(struct ptlrpc_request *req,
2319 struct ldlm_lock *lock)
2321 struct niobuf_remote *rnb;
2322 struct obd_ioobj *ioo;
2324 struct ldlm_extent ext;
2325 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
2329 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2330 LASSERT(ioo != NULL);
2332 rnb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2333 LASSERT(rnb != NULL);
2335 ext.start = rnb->rnb_offset;
2336 rnb += ioo->ioo_bufcnt - 1;
2337 ext.end = rnb->rnb_offset + rnb->rnb_len - 1;
2339 LASSERT(lock->l_resource != NULL);
2340 if (!ostid_res_name_eq(&ioo->ioo_oid, &lock->l_resource->lr_name))
2343 /* a bulk write can only hold a reference on a PW extent lock */
2345 if (opc == OST_READ)
2346 /* whereas a bulk read can be protected by either a PR or PW
2350 if (!(lock->l_granted_mode & mode))
2353 RETURN(ldlm_extent_overlap(&lock->l_policy_data.l_extent, &ext));
2357 * Implementation of ptlrpc_hpreq_ops::hpreq_lock_check for OFD RW requests.
2359 * Check for whether the given PTLRPC request (\a req) is blocking
2360 * an LDLM lock cancel.
2362 * \param[in] req the incoming request
2364 * \retval 1 if \a req is blocking an LDLM lock cancel
2365 * \retval 0 if it is not
2367 static int ofd_rw_hpreq_check(struct ptlrpc_request *req)
2369 struct tgt_session_info *tsi;
2370 struct obd_ioobj *ioo;
2371 struct niobuf_remote *rnb;
2377 /* Don't use tgt_ses_info() to get session info, because lock_match()
2378 * can be called while request has no processing thread yet. */
2379 tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
2382 * Use LASSERT below because malformed RPCs should have
2383 * been filtered out in tgt_hpreq_handler().
2385 ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
2386 LASSERT(ioo != NULL);
2388 rnb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
2389 LASSERT(rnb != NULL);
2390 LASSERT(!(rnb->rnb_flags & OBD_BRW_SRVLOCK));
2392 start = rnb->rnb_offset;
2393 rnb += ioo->ioo_bufcnt - 1;
2394 end = rnb->rnb_offset + rnb->rnb_len - 1;
2396 DEBUG_REQ(D_RPCTRACE, req, "%s %s: refresh rw locks: "DFID
2397 " ("LPU64"->"LPU64")\n",
2398 tgt_name(tsi->tsi_tgt), current->comm,
2399 PFID(&tsi->tsi_fid), start, end);
2401 lock_count = ofd_prolong_extent_locks(tsi, start, end);
2403 CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
2404 tgt_name(tsi->tsi_tgt), lock_count, req);
2406 RETURN(lock_count > 0);
2410 * Implementation of ptlrpc_hpreq_ops::hpreq_lock_fini for OFD RW requests.
2412 * Called after the request has been handled. It refreshes lock timeout again
2413 * so that client has more time to send lock cancel RPC.
2415 * \param[in] req request which is being processed.
2417 static void ofd_rw_hpreq_fini(struct ptlrpc_request *req)
2419 ofd_rw_hpreq_check(req);
2423 * Implementation of ptlrpc_hpreq_ops::hpreq_lock_match for OST_PUNCH request.
2425 * This function checks if the given lock is the same by its resname, mode
2426 * and extent as one taken from the request.
2427 * It is used to give priority to punch/truncate RPCs that might lead to
2428 * the fastest release of that lock when a lock is contended.
2430 * \param[in] req ptlrpc_request being processed
2431 * \param[in] lock contended lock to match
2433 * \retval 1 if lock is matched
2434 * \retval 0 otherwise
2436 static int ofd_punch_hpreq_lock_match(struct ptlrpc_request *req,
2437 struct ldlm_lock *lock)
2439 struct tgt_session_info *tsi;
2441 /* Don't use tgt_ses_info() to get session info, because lock_match()
2442 * can be called while request has no processing thread yet. */
2443 tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
2446 * Use LASSERT below because malformed RPCs should have
2447 * been filtered out in tgt_hpreq_handler().
2449 LASSERT(tsi->tsi_ost_body != NULL);
2450 if (tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLHANDLE &&
2451 tsi->tsi_ost_body->oa.o_handle.cookie == lock->l_handle.h_cookie)
2458 * Implementation of ptlrpc_hpreq_ops::hpreq_lock_check for OST_PUNCH request.
2460 * High-priority queue request check for whether the given punch request
2461 * (\a req) is blocking an LDLM lock cancel.
2463 * \param[in] req the incoming request
2465 * \retval 1 if \a req is blocking an LDLM lock cancel
2466 * \retval 0 if it is not
2468 static int ofd_punch_hpreq_check(struct ptlrpc_request *req)
2470 struct tgt_session_info *tsi;
2476 /* Don't use tgt_ses_info() to get session info, because lock_match()
2477 * can be called while request has no processing thread yet. */
2478 tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
2479 LASSERT(tsi != NULL);
2480 oa = &tsi->tsi_ost_body->oa;
2482 LASSERT(!(oa->o_valid & OBD_MD_FLFLAGS &&
2483 oa->o_flags & OBD_FL_SRVLOCK));
2486 "%s: refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
2487 tgt_name(tsi->tsi_tgt), tsi->tsi_resid.name[0],
2488 tsi->tsi_resid.name[1], oa->o_size, oa->o_blocks);
2490 lock_count = ofd_prolong_extent_locks(tsi, oa->o_size, oa->o_blocks);
2492 CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
2493 tgt_name(tsi->tsi_tgt), lock_count, req);
2495 RETURN(lock_count > 0);
2499 * Implementation of ptlrpc_hpreq_ops::hpreq_lock_fini for OST_PUNCH request.
2501 * Called after the request has been handled. It refreshes lock timeout again
2502 * so that client has more time to send lock cancel RPC.
2504 * \param[in] req request which is being processed.
2506 static void ofd_punch_hpreq_fini(struct ptlrpc_request *req)
2508 ofd_punch_hpreq_check(req);
2511 static struct ptlrpc_hpreq_ops ofd_hpreq_rw = {
2512 .hpreq_lock_match = ofd_rw_hpreq_lock_match,
2513 .hpreq_check = ofd_rw_hpreq_check,
2514 .hpreq_fini = ofd_rw_hpreq_fini
2517 static struct ptlrpc_hpreq_ops ofd_hpreq_punch = {
2518 .hpreq_lock_match = ofd_punch_hpreq_lock_match,
2519 .hpreq_check = ofd_punch_hpreq_check,
2520 .hpreq_fini = ofd_punch_hpreq_fini
2524 * Assign high priority operations to an IO request.
2526 * Check if the incoming request is a candidate for
2527 * high-priority processing. If it is, assign it a high
2528 * priority operations table.
2530 * \param[in] tsi target session environment for this request
2532 static void ofd_hp_brw(struct tgt_session_info *tsi)
2534 struct niobuf_remote *rnb;
2535 struct obd_ioobj *ioo;
2539 ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2540 LASSERT(ioo != NULL); /* must exist after request preprocessing */
2541 if (ioo->ioo_bufcnt > 0) {
2542 rnb = req_capsule_client_get(tsi->tsi_pill, &RMF_NIOBUF_REMOTE);
2543 LASSERT(rnb != NULL); /* must exist after request preprocessing */
2545 /* no high priority if server lock is needed */
2546 if (rnb->rnb_flags & OBD_BRW_SRVLOCK)
2549 tgt_ses_req(tsi)->rq_ops = &ofd_hpreq_rw;
2553 * Assign high priority operations to an punch request.
2555 * Check if the incoming request is a candidate for
2556 * high-priority processing. If it is, assign it a high
2557 * priority operations table.
2559 * \param[in] tsi target session environment for this request
2561 static void ofd_hp_punch(struct tgt_session_info *tsi)
2563 LASSERT(tsi->tsi_ost_body != NULL); /* must exists if we are here */
2564 /* no high-priority if server lock is needed */
2565 if (tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
2566 tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK)
2568 tgt_ses_req(tsi)->rq_ops = &ofd_hpreq_punch;
2571 #define OBD_FAIL_OST_READ_NET OBD_FAIL_OST_BRW_NET
2572 #define OBD_FAIL_OST_WRITE_NET OBD_FAIL_OST_BRW_NET
2573 #define OST_BRW_READ OST_READ
2574 #define OST_BRW_WRITE OST_WRITE
2577 * Table of OFD-specific request handlers
2579 * This table contains all opcodes accepted by OFD and
2580 * specifies handlers for them. The tgt_request_handler()
2581 * uses such table from each target to process incoming
2584 static struct tgt_handler ofd_tgt_handlers[] = {
2585 TGT_RPC_HANDLER(OST_FIRST_OPC,
2586 0, OST_CONNECT, tgt_connect,
2587 &RQF_CONNECT, LUSTRE_OBD_VERSION),
2588 TGT_RPC_HANDLER(OST_FIRST_OPC,
2589 0, OST_DISCONNECT, tgt_disconnect,
2590 &RQF_OST_DISCONNECT, LUSTRE_OBD_VERSION),
2591 TGT_RPC_HANDLER(OST_FIRST_OPC,
2592 0, OST_SET_INFO, ofd_set_info_hdl,
2593 &RQF_OBD_SET_INFO, LUSTRE_OST_VERSION),
2594 TGT_OST_HDL(0, OST_GET_INFO, ofd_get_info_hdl),
2595 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO, OST_GETATTR, ofd_getattr_hdl),
2596 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO | MUTABOR,
2597 OST_SETATTR, ofd_setattr_hdl),
2598 TGT_OST_HDL(0 | HABEO_REFERO | MUTABOR,
2599 OST_CREATE, ofd_create_hdl),
2600 TGT_OST_HDL(0 | HABEO_REFERO | MUTABOR,
2601 OST_DESTROY, ofd_destroy_hdl),
2602 TGT_OST_HDL(0 | HABEO_REFERO, OST_STATFS, ofd_statfs_hdl),
2603 TGT_OST_HDL_HP(HABEO_CORPUS| HABEO_REFERO,
2604 OST_BRW_READ, tgt_brw_read,
2606 /* don't set CORPUS flag for brw_write because -ENOENT may be valid case */
2607 TGT_OST_HDL_HP(HABEO_CORPUS| MUTABOR, OST_BRW_WRITE, tgt_brw_write,
2609 TGT_OST_HDL_HP(HABEO_CORPUS| HABEO_REFERO | MUTABOR,
2610 OST_PUNCH, ofd_punch_hdl,
2612 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO, OST_SYNC, ofd_sync_hdl),
2613 TGT_OST_HDL(0 | HABEO_REFERO, OST_QUOTACTL, ofd_quotactl),
2616 static struct tgt_opc_slice ofd_common_slice[] = {
2618 .tos_opc_start = OST_FIRST_OPC,
2619 .tos_opc_end = OST_LAST_OPC,
2620 .tos_hs = ofd_tgt_handlers
2623 .tos_opc_start = OBD_FIRST_OPC,
2624 .tos_opc_end = OBD_LAST_OPC,
2625 .tos_hs = tgt_obd_handlers
2628 .tos_opc_start = LDLM_FIRST_OPC,
2629 .tos_opc_end = LDLM_LAST_OPC,
2630 .tos_hs = tgt_dlm_handlers
2633 .tos_opc_start = OUT_UPDATE_FIRST_OPC,
2634 .tos_opc_end = OUT_UPDATE_LAST_OPC,
2635 .tos_hs = tgt_out_handlers
2638 .tos_opc_start = SEQ_FIRST_OPC,
2639 .tos_opc_end = SEQ_LAST_OPC,
2640 .tos_hs = seq_handlers
2643 .tos_opc_start = LFSCK_FIRST_OPC,
2644 .tos_opc_end = LFSCK_LAST_OPC,
2645 .tos_hs = tgt_lfsck_handlers
2652 /* context key constructor/destructor: ofd_key_init(), ofd_key_fini() */
2653 LU_KEY_INIT_FINI(ofd, struct ofd_thread_info);
2656 * Implementation of lu_context_key::lct_key_exit.
2658 * Optional method called on lu_context_exit() for all allocated
2660 * It is used in OFD to sanitize context values which may be re-used
2661 * during another request processing by the same thread.
2663 * \param[in] ctx execution context
2664 * \param[in] key context key
2665 * \param[in] data ofd_thread_info
2667 static void ofd_key_exit(const struct lu_context *ctx,
2668 struct lu_context_key *key, void *data)
2670 struct ofd_thread_info *info = data;
2672 info->fti_env = NULL;
2673 info->fti_exp = NULL;
2676 info->fti_pre_version = 0;
2679 memset(&info->fti_attr, 0, sizeof info->fti_attr);
2682 struct lu_context_key ofd_thread_key = {
2683 .lct_tags = LCT_DT_THREAD,
2684 .lct_init = ofd_key_init,
2685 .lct_fini = ofd_key_fini,
2686 .lct_exit = ofd_key_exit
2690 * Initialize OFD device according to parameters in the config log \a cfg.
2692 * This is the main starting point of OFD initialization. It fills all OFD
2693 * parameters with their initial values and calls other initializing functions
2694 * to set up all OFD subsystems.
2696 * \param[in] env execution environment
2697 * \param[in] m OFD device
2698 * \param[in] ldt LU device type of OFD
2699 * \param[in] cfg configuration log
2701 * \retval 0 if successful
2702 * \retval negative value on error
2704 static int ofd_init0(const struct lu_env *env, struct ofd_device *m,
2705 struct lu_device_type *ldt, struct lustre_cfg *cfg)
2707 const char *dev = lustre_cfg_string(cfg, 0);
2708 struct ofd_thread_info *info = NULL;
2709 struct obd_device *obd;
2710 struct obd_statfs *osfs;
2715 obd = class_name2obd(dev);
2717 CERROR("Cannot find obd with name %s\n", dev);
2721 rc = lu_env_refill((struct lu_env *)env);
2725 obd->u.obt.obt_magic = OBT_MAGIC;
2727 m->ofd_fmd_max_num = OFD_FMD_MAX_NUM_DEFAULT;
2728 m->ofd_fmd_max_age = OFD_FMD_MAX_AGE_DEFAULT;
2730 spin_lock_init(&m->ofd_flags_lock);
2731 m->ofd_raid_degraded = 0;
2732 m->ofd_syncjournal = 0;
2734 m->ofd_grant_compat_disable = 0;
2735 m->ofd_soft_sync_limit = OFD_SOFT_SYNC_LIMIT_DEFAULT;
2738 spin_lock_init(&m->ofd_osfs_lock);
2739 m->ofd_osfs_age = cfs_time_shift_64(-1000);
2740 m->ofd_osfs_unstable = 0;
2741 m->ofd_statfs_inflight = 0;
2742 m->ofd_osfs_inflight = 0;
2745 spin_lock_init(&m->ofd_grant_lock);
2746 m->ofd_tot_dirty = 0;
2747 m->ofd_tot_granted = 0;
2748 m->ofd_tot_pending = 0;
2749 m->ofd_seq_count = 0;
2750 init_waitqueue_head(&m->ofd_inconsistency_thread.t_ctl_waitq);
2751 INIT_LIST_HEAD(&m->ofd_inconsistency_list);
2752 spin_lock_init(&m->ofd_inconsistency_lock);
2754 spin_lock_init(&m->ofd_batch_lock);
2755 init_rwsem(&m->ofd_lastid_rwsem);
2757 m->ofd_dt_dev.dd_lu_dev.ld_ops = &ofd_lu_ops;
2758 m->ofd_dt_dev.dd_lu_dev.ld_obd = obd;
2759 /* set this lu_device to obd, because error handling need it */
2760 obd->obd_lu_dev = &m->ofd_dt_dev.dd_lu_dev;
2762 rc = ofd_procfs_init(m);
2764 CERROR("Can't init ofd lprocfs, rc %d\n", rc);
2768 /* No connection accepted until configurations will finish */
2769 spin_lock(&obd->obd_dev_lock);
2770 obd->obd_no_conn = 1;
2771 spin_unlock(&obd->obd_dev_lock);
2772 obd->obd_replayable = 1;
2773 if (cfg->lcfg_bufcount > 4 && LUSTRE_CFG_BUFLEN(cfg, 4) > 0) {
2774 char *str = lustre_cfg_string(cfg, 4);
2776 if (strchr(str, 'n')) {
2777 CWARN("%s: recovery disabled\n", obd->obd_name);
2778 obd->obd_replayable = 0;
2782 info = ofd_info_init(env, NULL);
2786 rc = ofd_stack_init(env, m, cfg);
2788 CERROR("Can't init device stack, rc %d\n", rc);
2789 GOTO(err_fini_proc, rc);
2792 ofd_procfs_add_brw_stats_symlink(m);
2794 /* populate cached statfs data */
2795 osfs = &ofd_info(env)->fti_u.osfs;
2796 rc = ofd_statfs_internal(env, m, osfs, 0, NULL);
2798 CERROR("%s: can't get statfs data, rc %d\n", obd->obd_name, rc);
2799 GOTO(err_fini_stack, rc);
2801 if (!IS_PO2(osfs->os_bsize)) {
2802 CERROR("%s: blocksize (%d) is not a power of 2\n",
2803 obd->obd_name, osfs->os_bsize);
2804 GOTO(err_fini_stack, rc = -EPROTO);
2806 m->ofd_blockbits = fls(osfs->os_bsize) - 1;
2808 m->ofd_precreate_batch = OFD_PRECREATE_BATCH_DEFAULT;
2809 if (osfs->os_bsize * osfs->os_blocks < OFD_PRECREATE_SMALL_FS)
2810 m->ofd_precreate_batch = OFD_PRECREATE_BATCH_SMALL;
2812 snprintf(info->fti_u.name, sizeof(info->fti_u.name), "%s-%s",
2813 "filter"/*LUSTRE_OST_NAME*/, obd->obd_uuid.uuid);
2814 m->ofd_namespace = ldlm_namespace_new(obd, info->fti_u.name,
2815 LDLM_NAMESPACE_SERVER,
2816 LDLM_NAMESPACE_GREEDY,
2818 if (m->ofd_namespace == NULL)
2819 GOTO(err_fini_stack, rc = -ENOMEM);
2820 /* set obd_namespace for compatibility with old code */
2821 obd->obd_namespace = m->ofd_namespace;
2822 ldlm_register_intent(m->ofd_namespace, ofd_intent_policy);
2823 m->ofd_namespace->ns_lvbo = &ofd_lvbo;
2824 m->ofd_namespace->ns_lvbp = m;
2826 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
2827 "filter_ldlm_cb_client", &obd->obd_ldlm_client);
2829 dt_conf_get(env, m->ofd_osd, &m->ofd_dt_conf);
2831 /* Allow at most ddp_grant_reserved% of the available filesystem space
2832 * to be granted to clients, so that any errors in the grant overhead
2833 * calculations do not allow granting more space to clients than can be
2834 * written. Assumes that in aggregate the grant overhead calculations do
2835 * not have more than ddp_grant_reserved% estimation error in them. */
2836 m->ofd_grant_ratio =
2837 ofd_grant_ratio_conv(m->ofd_dt_conf.ddp_grant_reserved);
2839 rc = tgt_init(env, &m->ofd_lut, obd, m->ofd_osd, ofd_common_slice,
2840 OBD_FAIL_OST_ALL_REQUEST_NET,
2841 OBD_FAIL_OST_ALL_REPLY_NET);
2843 GOTO(err_free_ns, rc);
2845 rc = ofd_fs_setup(env, m, obd);
2847 GOTO(err_fini_lut, rc);
2849 rc = ofd_start_inconsistency_verification_thread(m);
2851 GOTO(err_fini_fs, rc);
2856 ofd_fs_cleanup(env, m);
2858 tgt_fini(env, &m->ofd_lut);
2860 ldlm_namespace_free(m->ofd_namespace, NULL, obd->obd_force);
2861 obd->obd_namespace = m->ofd_namespace = NULL;
2863 ofd_stack_fini(env, m, &m->ofd_osd->dd_lu_dev);
2870 * Stop the OFD device
2872 * This function stops the OFD device and all its subsystems.
2873 * This is the end of OFD lifecycle.
2875 * \param[in] env execution environment
2876 * \param[in] m OFD device
2878 static void ofd_fini(const struct lu_env *env, struct ofd_device *m)
2880 struct obd_device *obd = ofd_obd(m);
2881 struct lu_device *d = &m->ofd_dt_dev.dd_lu_dev;
2882 struct lfsck_stop stop;
2884 stop.ls_status = LS_PAUSED;
2886 lfsck_stop(env, m->ofd_osd, &stop);
2887 target_recovery_fini(obd);
2888 obd_exports_barrier(obd);
2889 obd_zombie_barrier();
2891 tgt_fini(env, &m->ofd_lut);
2892 ofd_stop_inconsistency_verification_thread(m);
2893 lfsck_degister(env, m->ofd_osd);
2894 ofd_fs_cleanup(env, m);
2896 if (m->ofd_namespace != NULL) {
2897 ldlm_namespace_free(m->ofd_namespace, NULL,
2898 d->ld_obd->obd_force);
2899 d->ld_obd->obd_namespace = m->ofd_namespace = NULL;
2902 ofd_stack_fini(env, m, &m->ofd_dt_dev.dd_lu_dev);
2904 LASSERT(atomic_read(&d->ld_ref) == 0);
2905 server_put_mount(obd->obd_name, true);
2910 * Implementation of lu_device_type_operations::ldto_device_fini.
2912 * Finalize device. Dual to ofd_device_init(). It is called from
2913 * obd_precleanup() and stops the current device.
2915 * \param[in] env execution environment
2916 * \param[in] d LU device of OFD
2920 static struct lu_device *ofd_device_fini(const struct lu_env *env,
2921 struct lu_device *d)
2924 ofd_fini(env, ofd_dev(d));
2929 * Implementation of lu_device_type_operations::ldto_device_free.
2931 * Free OFD device. Dual to ofd_device_alloc().
2933 * \param[in] env execution environment
2934 * \param[in] d LU device of OFD
2938 static struct lu_device *ofd_device_free(const struct lu_env *env,
2939 struct lu_device *d)
2941 struct ofd_device *m = ofd_dev(d);
2943 dt_device_fini(&m->ofd_dt_dev);
2949 * Implementation of lu_device_type_operations::ldto_device_alloc.
2951 * This function allocates the new OFD device. It is called from
2952 * obd_setup() if OBD device had lu_device_type defined.
2954 * \param[in] env execution environment
2955 * \param[in] t lu_device_type of OFD device
2956 * \param[in] cfg configuration log
2958 * \retval pointer to the lu_device of just allocated OFD
2959 * \retval ERR_PTR of return value on error
2961 static struct lu_device *ofd_device_alloc(const struct lu_env *env,
2962 struct lu_device_type *t,
2963 struct lustre_cfg *cfg)
2965 struct ofd_device *m;
2966 struct lu_device *l;
2971 return ERR_PTR(-ENOMEM);
2973 l = &m->ofd_dt_dev.dd_lu_dev;
2974 dt_device_init(&m->ofd_dt_dev, t);
2975 rc = ofd_init0(env, m, t, cfg);
2977 ofd_device_free(env, l);
2984 /* type constructor/destructor: ofd_type_init(), ofd_type_fini() */
2985 LU_TYPE_INIT_FINI(ofd, &ofd_thread_key);
2987 static struct lu_device_type_operations ofd_device_type_ops = {
2988 .ldto_init = ofd_type_init,
2989 .ldto_fini = ofd_type_fini,
2991 .ldto_start = ofd_type_start,
2992 .ldto_stop = ofd_type_stop,
2994 .ldto_device_alloc = ofd_device_alloc,
2995 .ldto_device_free = ofd_device_free,
2996 .ldto_device_fini = ofd_device_fini
2999 static struct lu_device_type ofd_device_type = {
3000 .ldt_tags = LU_DEVICE_DT,
3001 .ldt_name = LUSTRE_OST_NAME,
3002 .ldt_ops = &ofd_device_type_ops,
3003 .ldt_ctx_tags = LCT_DT_THREAD
3007 * Initialize OFD module.
3009 * This function is called upon module loading. It registers OFD device type
3010 * and prepares all in-memory structures used by all OFD devices.
3012 * \retval 0 if successful
3013 * \retval negative value on error
3015 static int __init ofd_init(void)
3019 rc = lu_kmem_init(ofd_caches);
3023 rc = ofd_fmd_init();
3025 lu_kmem_fini(ofd_caches);
3029 rc = class_register_type(&ofd_obd_ops, NULL, true, NULL,
3030 LUSTRE_OST_NAME, &ofd_device_type);
3037 * This function is called upon OFD module unloading.
3038 * It frees all related structures and unregisters OFD device type.
3040 static void __exit ofd_exit(void)
3043 lu_kmem_fini(ofd_caches);
3044 class_unregister_type(LUSTRE_OST_NAME);
3047 MODULE_AUTHOR("Whamcloud, Inc. <http://www.whamcloud.com/>");
3048 MODULE_DESCRIPTION("Lustre Object Filtering Device");
3049 MODULE_LICENSE("GPL");
3051 module_init(ofd_init);
3052 module_exit(ofd_exit);