1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
5 * Author: Phil Schwan <phil@clusterfs.com>
6 * Peter Braam <braam@clusterfs.com>
7 * Mike Shaver <shaver@clusterfs.com>
9 * This file is part of Lustre, http://www.lustre.org.
11 * Lustre is free software; you can redistribute it and/or
12 * modify it under the terms of version 2 of the GNU General Public
13 * License as published by the Free Software Foundation.
15 * Lustre is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with Lustre; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 # define EXPORT_SYMTAB
28 #define DEBUG_SUBSYSTEM S_LOV
30 #include <linux/slab.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/slab.h>
34 #include <linux/pagemap.h>
35 #include <linux/seq_file.h>
36 #include <asm/div64.h>
38 #include <liblustre.h>
41 #include <linux/obd_support.h>
42 #include <linux/lustre_lib.h>
43 #include <linux/lustre_net.h>
44 #include <linux/lustre_idl.h>
45 #include <linux/lustre_dlm.h>
46 #include <linux/lustre_mds.h>
47 #include <linux/obd_class.h>
48 #include <linux/obd_lov.h>
49 #include <linux/obd_ost.h>
50 #include <linux/lprocfs_status.h>
51 #include <linux/lustre_audit.h>
52 #include "lov_internal.h"
55 #define MAX_STRING_SIZE 128
56 static int lov_connect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt,
57 int activate, struct obd_connect_data *conn_data,
58 unsigned long connect_flags)
60 struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
61 struct obd_uuid *tgt_uuid = &tgt->uuid;
64 struct proc_dir_entry *lov_proc_dir;
66 struct lov_obd *lov = &obd->u.lov;
67 struct lustre_handle conn = {0, };
68 struct obd_device *tgt_obd;
72 tgt_obd = class_find_client_obd(tgt_uuid, OBD_OSC_DEVICENAME,
76 CERROR("Target %s not attached\n", tgt_uuid->uuid);
80 if (!tgt_obd->obd_set_up) {
81 CERROR("Target %s not set up\n", tgt_uuid->uuid);
86 tgt_obd->obd_no_recov = 0;
87 ptlrpc_activate_import(tgt_obd->u.cli.cl_import);
90 if (tgt_obd->u.cli.cl_import->imp_invalid) {
91 CERROR("not connecting OSC %s; administratively "
92 "disabled\n", tgt_uuid->uuid);
93 rc = obd_register_observer(tgt_obd, obd);
95 CERROR("Target %s register_observer error %d; "
96 "will not be able to reactivate\n",
102 rc = obd_connect(&conn, tgt_obd, &lov_osc_uuid, conn_data,
105 CERROR("Target %s connect error %d\n", tgt_uuid->uuid, rc);
108 tgt->ltd_exp = class_conn2export(&conn);
110 rc = obd_register_observer(tgt_obd, obd);
112 CERROR("Target %s register_observer error %d\n",
114 obd_disconnect(tgt->ltd_exp, 0);
119 lov_tgt_set_flags(lov, tgt, LTD_ACTIVE);
122 lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
124 struct obd_device *osc_obd = class_conn2obd(&conn);
125 struct proc_dir_entry *osc_symlink;
126 char name[MAX_STRING_SIZE + 1];
128 LASSERT(osc_obd != NULL);
129 LASSERT(osc_obd->obd_type != NULL);
130 LASSERT(osc_obd->obd_type->typ_name != NULL);
131 name[MAX_STRING_SIZE] = '\0';
132 snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
133 osc_obd->obd_type->typ_name,
135 osc_symlink = proc_symlink(osc_obd->obd_name, lov_proc_dir,
137 if (osc_symlink == NULL) {
138 CERROR("could not register LOV target "
139 "/proc/fs/lustre/%s/%s/target_obds/%s\n",
140 obd->obd_type->typ_name, obd->obd_name,
142 lprocfs_remove(lov_proc_dir);
151 static int lov_connect(struct lustre_handle *conn, struct obd_device *obd,
152 struct obd_uuid *cluuid, struct obd_connect_data *data,
156 struct proc_dir_entry *lov_proc_dir;
158 struct lov_obd *lov = &obd->u.lov;
159 struct lov_tgt_desc *tgt;
160 struct obd_export *exp;
164 rc = class_connect(conn, obd, cluuid);
168 exp = class_conn2export(conn);
170 /* We don't want to actually do the underlying connections more than
171 * once, so keep track. */
173 if (lov->refcount > 1) {
174 class_export_put(exp);
179 lov_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
181 if (IS_ERR(lov_proc_dir)) {
182 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
183 obd->obd_type->typ_name, obd->obd_name);
188 /* connect_flags is the MDS number, save for use in lov_add_obd */
189 lov->lov_connect_flags = flags;
190 for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
191 if (obd_uuid_empty(&tgt->uuid))
193 rc = lov_connect_obd(obd, tgt, 0, data, flags);
198 class_export_put(exp);
204 lprocfs_remove(lov_proc_dir);
208 struct obd_uuid uuid;
210 lov_tgt_clear_flags(lov, tgt, LTD_ACTIVE);
212 /* save for CERROR below; (we know it's terminated) */
214 rc2 = obd_disconnect(tgt->ltd_exp, 0);
216 CERROR("error: LOV target %s disconnect on OST idx %d: "
217 "rc = %d\n", uuid.uuid, i, rc2);
219 class_disconnect(exp, 0);
223 static int lov_disconnect_obd(struct obd_device *obd,
224 struct lov_tgt_desc *tgt,
228 struct proc_dir_entry *lov_proc_dir;
230 struct obd_device *osc_obd = class_exp2obd(tgt->ltd_exp);
231 struct lov_obd *lov = &obd->u.lov;
236 lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
238 struct proc_dir_entry *osc_symlink;
240 osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name);
242 lprocfs_remove(osc_symlink);
244 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
245 obd->obd_type->typ_name, obd->obd_name,
250 if (obd->obd_no_recov) {
251 /* Pass it on to our clients.
252 * XXX This should be an argument to disconnect,
253 * XXX not a back-door flag on the OBD. Ah well.
256 osc_obd->obd_no_recov = 1;
259 /* XXX - shouldn't this be after the obd_disconnect() ? */
260 obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
262 rc = obd_disconnect(tgt->ltd_exp, flags);
264 if (lov_tgt_active(lov, tgt, 0)) {
265 lov_tgt_decref(lov, tgt);
266 CERROR("Target %s disconnect error %d\n",
271 CDEBUG(D_CONFIG, "idx: %d flags: 0x%x active: %d\n",
272 tgt - lov->tgts, tgt->ltd_flags,
273 lov->desc.ld_active_tgt_count);
275 lov_tgt_clear_flags(lov, tgt, LTD_ACTIVE);
280 static int lov_disconnect(struct obd_export *exp, unsigned long flags)
282 struct obd_device *obd = class_exp2obd(exp);
284 struct proc_dir_entry *lov_proc_dir;
286 struct lov_obd *lov = &obd->u.lov;
287 struct lov_tgt_desc *tgt;
294 /* Only disconnect the underlying layers on the final disconnect. */
296 if (lov->refcount != 0)
299 for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
301 lov_disconnect_obd(obd, tgt, flags);
305 lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
307 lprocfs_remove(lov_proc_dir);
309 CERROR("/proc/fs/lustre/%s/%s/target_obds missing.",
310 obd->obd_type->typ_name, obd->obd_name);
315 rc = class_disconnect(exp, 0);
321 * -EINVAL : UUID can't be found in the LOV's target list
322 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
323 * -EBADF : The UUID is found, but the OBD is the wrong type (!)
325 static int lov_set_osc_active(struct lov_obd *lov, struct obd_uuid *uuid,
328 struct lov_tgt_desc *tgt;
332 CDEBUG(D_INFO, "Searching in lov %p for uuid %s (activate=%d)\n",
333 lov, uuid->uuid, activate);
336 for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
337 if (tgt->ltd_exp == NULL)
340 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
341 i, tgt->uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
343 if (obd_uuid_equals(uuid, &tgt->uuid))
347 if (i == lov->desc.ld_tgt_count)
348 GOTO(out, rc = -EINVAL);
351 if (tgt->ltd_flags & LTD_ACTIVE) {
352 CDEBUG(D_CONFIG|D_INFO, "OSC %s already active!\n",
356 CDEBUG(D_INFO, "Marking OSC %s active\n", uuid->uuid);
357 tgt->ltd_flags |= LTD_ACTIVE;
358 lov->desc.ld_active_tgt_count++;
360 if ((tgt->ltd_flags & LTD_ACTIVE) == 0) {
361 CDEBUG(D_CONFIG|D_INFO, "OSC %s already inactive!\n",
365 CDEBUG(D_INFO, "Marking OSC %s inactive\n", uuid->uuid);
366 tgt->ltd_flags &= ~LTD_ACTIVE;
367 lov->desc.ld_active_tgt_count--;
372 lov_tgts_unlock(lov);
376 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
377 int active, void *data)
379 struct obd_uuid *uuid;
383 if (strcmp(watched->obd_type->typ_name, OBD_OSC_DEVICENAME)) {
384 CERROR("unexpected notification of %s %s!\n",
385 watched->obd_type->typ_name,
390 uuid = &watched->u.cli.cl_import->imp_target_uuid;
392 /* Set OSC as active before notifying the observer, so the
393 * observer can use the OSC normally.
395 rc = lov_set_osc_active(&obd->u.lov, uuid, active);
397 CERROR("%sactivation of %s failed: %d\n",
398 active ? "" : "de", uuid->uuid, rc);
402 if (obd->obd_observer)
403 /* Pass the notification up the chain. */
404 rc = obd_notify(obd->obd_observer, watched, active, data);
409 int lov_attach(struct obd_device *dev, obd_count len, void *data)
411 struct lprocfs_static_vars lvars;
414 lprocfs_init_vars(lov, &lvars);
415 rc = lprocfs_obd_attach(dev, lvars.obd_vars);
418 struct proc_dir_entry *entry;
420 entry = create_proc_entry("target_obd_status", 0444,
421 dev->obd_proc_entry);
425 entry->proc_fops = &lov_proc_target_fops;
433 int lov_detach(struct obd_device *dev)
435 return lprocfs_obd_detach(dev);
438 static int lov_setup(struct obd_device *obd, obd_count len, void *buf)
440 struct lov_obd *lov = &obd->u.lov;
441 struct lustre_cfg *lcfg = buf;
442 struct lov_desc *desc;
446 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
447 CERROR("LOV setup requires a descriptor\n");
451 desc = (struct lov_desc *)lustre_cfg_string(lcfg, 1);
452 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
453 CERROR("descriptor size wrong: %d > %d\n",
454 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
458 /* Because of 64-bit divide/mod operations only work with a 32-bit
459 * divisor in a 32-bit kernel, we cannot support a stripe width
460 * of 4GB or larger on 32-bit CPUs.
463 count = desc->ld_default_stripe_count;
464 if (count && (count * desc->ld_default_stripe_size) > ~0UL) {
465 CERROR("LOV: stripe width "LPU64"x%u > %lu on 32-bit system\n",
466 desc->ld_default_stripe_size, count, ~0UL);
470 lov->bufsize = sizeof(struct lov_tgt_desc) * LOV_MAX_TGT_COUNT;
471 OBD_ALLOC(lov->tgts, lov->bufsize);
472 if (lov->tgts == NULL) {
474 CERROR("couldn't allocate %d bytes for target table.\n",
479 desc->ld_tgt_count = 0;
480 desc->ld_active_tgt_count = 0;
482 spin_lock_init(&lov->lov_lock);
483 sema_init(&lov->lov_llog_sem, 1);
484 init_waitqueue_head(&lov->lov_tgt_waitq);
489 static int lov_cleanup(struct obd_device *obd, int flags)
491 struct lov_obd *lov = &obd->u.lov;
493 OBD_FREE(lov->tgts, lov->bufsize);
498 lov_add_obd(struct obd_device *obd, struct obd_uuid *uuidp, int index, int gen)
500 struct lov_obd *lov = &obd->u.lov;
501 struct lov_tgt_desc *tgt;
505 CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d\n",
506 uuidp->uuid, index, gen);
508 if ((index < 0) || (index >= LOV_MAX_TGT_COUNT)) {
509 CERROR("request to add OBD %s at invalid index: %d\n",
515 CERROR("request to add OBD %s with invalid generation: %d\n",
520 tgt = lov->tgts + index;
524 if (!obd_uuid_empty(&tgt->uuid)) {
525 lov_tgts_unlock(lov);
526 CERROR("OBD already assigned at LOV target index %d\n",
532 /* XXX - add a sanity check on the generation number. */
536 if (index >= lov->desc.ld_tgt_count)
537 lov->desc.ld_tgt_count = index + 1;
539 lov_tgts_unlock(lov);
541 CDEBUG(D_CONFIG, "idx: %d ltd_gen: %d ld_tgt_count: %d\n",
542 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
544 if (lov->refcount == 0)
547 /* We don't need to lock the tgt entry here because the
548 * config events are single threaded. Therefore only the
549 * current thread can be changing the tgts tbl. */
551 struct obd_device *osc_obd;
553 osc_obd = class_exp2obd(tgt->ltd_exp);
555 osc_obd->obd_no_recov = 0;
558 rc = lov_connect_obd(obd, tgt, 0, NULL, lov->lov_connect_flags);
562 if (obd->obd_observer) {
563 /* tell the mds_lov about the new target */
564 rc = obd_notify(obd->obd_observer, tgt->ltd_exp->exp_obd, 1,
570 if (rc && tgt->ltd_exp != NULL)
571 lov_disconnect_obd(obd, tgt, 0);
576 lov_del_obd(struct obd_device *obd, struct obd_uuid *uuidp, int index, int gen)
578 struct lov_obd *lov = &obd->u.lov;
579 struct lov_tgt_desc *tgt;
580 struct l_wait_info lwi = { 0 };
581 int count = lov->desc.ld_tgt_count;
585 CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d\n",
586 uuidp->uuid, index, gen);
588 if (index >= count) {
589 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
594 tgt = lov->tgts + index;
596 if (obd_uuid_empty(&tgt->uuid)) {
597 CERROR("LOV target at index %d is not setup.\n", index);
601 if (!obd_uuid_equals(uuidp, &tgt->uuid)) {
602 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
603 tgt->uuid.uuid, index, uuidp->uuid);
607 lov_tgt_set_flags(lov, tgt, LTD_DEL_PENDING);
610 struct obd_device *osc_obd;
612 rc = obd_cancel_unused(tgt->ltd_exp, NULL,
613 LDLM_FL_CONFIG_CHANGE, NULL);
615 CWARN("obd_cancel_unused(osc): %d\n", rc);
617 osc_obd = class_exp2obd(tgt->ltd_exp);
619 osc_obd->obd_no_recov = 1;
620 rc = obd_llog_finish(osc_obd, &osc_obd->obd_llogs, 1);
622 CERROR("osc_llog_finish error: %d\n", rc);
625 lov_disconnect_obd(obd, tgt, 0);
628 CDEBUG(D_CONFIG, "Sleeping until LOV target index %d UUID %s "
629 "is quiesced; ltd_refcount: %d ld_active_tgt_count: %d.\n",
630 index, uuidp->uuid, tgt->ltd_refcount,
631 lov->desc.ld_active_tgt_count);
633 /* XXX - should we set a timeout ? */
634 lwi = LWI_TIMEOUT_INTR(0, NULL, NULL, NULL);
635 rc = l_wait_event(lov->lov_tgt_waitq, (tgt->ltd_refcount == 0), &lwi);
637 lov_tgt_clear_flags(lov, tgt, LTD_DEL_PENDING);
638 CERROR("LOV target delete UUID %s index %d aborted: %d.\n",
639 uuidp->uuid, index, rc);
643 CDEBUG(D_CONFIG, "LOV target index %d UUID %s is quiesced; "
644 "ltd_refcount: %d ld_active_tgt_count: %d.\n",
645 index, uuidp->uuid, tgt->ltd_refcount,
646 lov->desc.ld_active_tgt_count);
648 /* XXX - right now there is a dependency on ld_tgt_count being the
649 * maximum tgt index for computing the mds_max_easize. So we can't
652 /* lt_gen = 0 will mean it will not match the gen of any valid loi */
653 memset(tgt, 0, sizeof(*tgt));
657 static int lov_process_config(struct obd_device *obd, obd_count len, void *buf)
659 struct lustre_cfg *lcfg = buf;
660 struct obd_uuid obd_uuid;
667 switch(cmd = lcfg->lcfg_command) {
668 case LCFG_LOV_ADD_OBD:
669 case LCFG_LOV_DEL_OBD: {
670 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
671 GOTO(out, rc = -EINVAL);
673 obd_str2uuid(&obd_uuid, lustre_cfg_string(lcfg, 1));
675 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
676 GOTO(out, rc = -EINVAL);
677 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
678 GOTO(out, rc = -EINVAL);
679 if (cmd == LCFG_LOV_ADD_OBD)
680 rc = lov_add_obd(obd, &obd_uuid, index, gen);
682 rc = lov_del_obd(obd, &obd_uuid, index, gen);
686 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
687 GOTO(out, rc = -EINVAL);
696 #define log2(n) ffz(~(n))
699 static int lov_clear_orphans(struct obd_export *export,
701 struct lov_stripe_md **ea,
702 struct obd_trans_info *oti)
706 struct obd_uuid *ost_uuid = NULL;
707 struct lov_tgt_desc *tgt;
711 LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
712 src_oa->o_flags == OBD_FL_DELORPHAN);
714 lov = &export->exp_obd->u.lov;
716 tmp_oa = obdo_alloc();
720 if (src_oa->o_valid & OBD_MD_FLINLINE) {
721 ost_uuid = (struct obd_uuid *)src_oa->o_inline;
722 CDEBUG(D_HA, "clearing orphans only for %s\n",
726 for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
727 struct lov_stripe_md obj_md;
728 struct lov_stripe_md *obj_mdp = &obj_md;
732 /* if called for a specific target, we don't
733 care if it is not active. */
734 if (lov_tgt_active(lov, tgt, 0)) {
736 } else if (ost_uuid == NULL) {
737 CDEBUG(D_HA, "lov idx %d inactive\n", i);
741 if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->uuid)) {
743 lov_tgt_decref(lov, tgt);
748 * setting up objid OSS objects should be destroyed starting
751 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
752 tmp_oa->o_valid |= OBD_MD_FLID;
753 tmp_oa->o_id = oti->oti_objid[i];
755 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
756 err = obd_create(tgt->ltd_exp, tmp_oa, NULL, 0, &obj_mdp, oti);
758 /* This export will be disabled until it is recovered,
759 and then orphan recovery will be completed. */
760 CERROR("error in orphan recovery on OST idx %d/%d: "
761 "rc = %d\n", i, lov->desc.ld_tgt_count, err);
764 lov_tgt_decref(lov, tgt);
774 /* the LOV expects oa->o_id to be set to the LOV object id */
776 lov_create(struct obd_export *exp, struct obdo *src_oa,
777 void *acl, int acl_size, struct lov_stripe_md **ea,
778 struct obd_trans_info *oti)
780 struct lov_request_set *set = NULL;
781 struct list_head *pos;
790 if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
791 src_oa->o_flags == OBD_FL_DELORPHAN) {
792 rc = lov_clear_orphans(exp, src_oa, ea, oti);
796 LASSERT(oti->oti_flags & OBD_MODE_CROW);
798 /* main creation loop */
799 rc = lov_prep_create_set(exp, ea, src_oa, oti, &set);
803 lov = &exp->exp_obd->u.lov;
805 list_for_each (pos, &set->set_list) {
806 struct lov_request *req =
807 list_entry(pos, struct lov_request, rq_link);
809 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
810 rc = obd_create(lov->tgts[req->rq_idx].ltd_exp,
811 req->rq_oa, NULL, 0, &req->rq_md, oti);
812 lov_update_create_set(set, req, rc);
814 rc = lov_fini_create_set(set, ea);
818 #define lsm_bad_magic(LSMP) \
820 struct lov_stripe_md *_lsm__ = (LSMP); \
823 CERROR("LOV requires striping ea\n"); \
825 } else if (_lsm__->lsm_magic != LOV_MAGIC) { \
826 CERROR("LOV striping magic bad %#x != %#x\n", \
827 _lsm__->lsm_magic, LOV_MAGIC); \
833 static int lov_destroy(struct obd_export *exp, struct obdo *oa,
834 struct lov_stripe_md *lsm, struct obd_trans_info *oti)
836 struct lov_request_set *set;
837 struct lov_request *req;
838 struct list_head *pos;
843 if (lsm_bad_magic(lsm))
846 if (!exp || !exp->exp_obd)
849 lov = &exp->exp_obd->u.lov;
850 rc = lov_prep_destroy_set(exp, oa, lsm, oti, &set);
854 list_for_each (pos, &set->set_list) {
856 req = list_entry(pos, struct lov_request, rq_link);
858 /* XXX update the cookie position */
859 oti->oti_logcookies = set->set_cookies + req->rq_stripe;
860 rc = obd_destroy(lov->tgts[req->rq_idx].ltd_exp, req->rq_oa,
862 err = lov_update_common_set(set, req, rc);
864 CERROR("error: destroying objid "LPX64" subobj "
865 LPX64" on OST idx %d: rc = %d\n",
866 set->set_oa->o_id, req->rq_oa->o_id,
872 lov_fini_destroy_set(set);
876 static int lov_getattr(struct obd_export *exp, struct obdo *oa,
877 struct lov_stripe_md *lsm)
879 struct lov_request_set *set;
880 struct lov_request *req;
881 struct list_head *pos;
886 if (lsm_bad_magic(lsm))
889 if (!exp || !exp->exp_obd)
892 lov = &exp->exp_obd->u.lov;
894 rc = lov_prep_getattr_set(exp, oa, lsm, &set);
898 list_for_each (pos, &set->set_list) {
899 req = list_entry(pos, struct lov_request, rq_link);
901 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
902 "%u\n", oa->o_id, req->rq_stripe, req->rq_oa->o_id,
905 rc = obd_getattr(lov->tgts[req->rq_idx].ltd_exp,
907 err = lov_update_common_set(set, req, rc);
909 CERROR("error: getattr objid "LPX64" subobj "
910 LPX64" on OST idx %d: rc = %d\n",
911 set->set_oa->o_id, req->rq_oa->o_id,
917 rc = lov_fini_getattr_set(set);
923 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset, void *data,
926 struct lov_request_set *lovset = (struct lov_request_set *)data;
929 /* don't do attribute merge if this aysnc op failed */
931 lovset->set_completes = 0;
932 lov_fini_getattr_set(lovset);
934 rc = lov_fini_getattr_set(lovset);
939 static int lov_getattr_async(struct obd_export *exp, struct obdo *oa,
940 struct lov_stripe_md *lsm,
941 struct ptlrpc_request_set *rqset)
943 struct lov_request_set *lovset;
945 struct list_head *pos;
946 struct lov_request *req;
950 if (lsm_bad_magic(lsm))
953 if (!exp || !exp->exp_obd)
956 lov = &exp->exp_obd->u.lov;
958 rc = lov_prep_getattr_set(exp, oa, lsm, &lovset);
962 CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
963 lsm->lsm_object_id, lsm->lsm_stripe_count, lsm->lsm_stripe_size);
965 list_for_each (pos, &lovset->set_list) {
966 req = list_entry(pos, struct lov_request, rq_link);
968 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
969 "%u\n", oa->o_id, req->rq_stripe, req->rq_oa->o_id,
971 rc = obd_getattr_async(lov->tgts[req->rq_idx].ltd_exp,
972 req->rq_oa, NULL, rqset);
974 CERROR("error: getattr objid "LPX64" subobj "
975 LPX64" on OST idx %d: rc = %d\n",
976 lovset->set_oa->o_id, req->rq_oa->o_id,
980 lov_update_common_set(lovset, req, rc);
984 LASSERT (rqset->set_interpret == NULL);
985 rqset->set_interpret = lov_getattr_interpret;
986 rqset->set_arg = (void *)lovset;
990 lov_fini_getattr_set(lovset);
994 static int lov_setattr(struct obd_export *exp, struct obdo *src_oa,
995 struct lov_stripe_md *lsm, struct obd_trans_info *oti,
996 struct lustre_capa *capa)
998 struct lov_request_set *set;
1000 struct list_head *pos;
1001 struct lov_request *req;
1002 int err = 0, rc = 0;
1005 if (lsm_bad_magic(lsm))
1008 if (!exp || !exp->exp_obd)
1011 LASSERT(!(src_oa->o_valid & ~(OBD_MD_FLID|OBD_MD_FLTYPE | OBD_MD_FLMODE|
1012 OBD_MD_FLATIME | OBD_MD_FLMTIME |
1013 OBD_MD_FLCTIME | OBD_MD_FLFLAGS |
1014 OBD_MD_FLSIZE | OBD_MD_FLGROUP |
1015 OBD_MD_FLUID | OBD_MD_FLGID |
1016 OBD_MD_FLINLINE | OBD_MD_FLIFID)));
1018 LASSERT(!(src_oa->o_valid & OBD_MD_FLGROUP) || src_oa->o_gr > 0);
1020 lov = &exp->exp_obd->u.lov;
1021 rc = lov_prep_setattr_set(exp, src_oa, lsm, NULL, &set);
1025 list_for_each (pos, &set->set_list) {
1026 req = list_entry(pos, struct lov_request, rq_link);
1028 rc = obd_setattr(lov->tgts[req->rq_idx].ltd_exp, req->rq_oa,
1030 err = lov_update_common_set(set, req, rc);
1032 CERROR("error: setattr objid "LPX64" subobj "
1033 LPX64" on OST idx %d: rc = %d\n",
1034 set->set_oa->o_id, req->rq_oa->o_id,
1040 err = lov_fini_setattr_set(set);
1046 static int lov_revalidate_policy(struct lov_obd *lov, struct lov_stripe_md *lsm)
1048 static int next_idx = 0;
1049 struct lov_tgt_desc *tgt;
1053 /* XXX - we should do something clever and take lsm
1054 * into account but just do round robin for now. */
1056 /* last_idx must always be less that count because
1057 * ld_tgt_count currently cannot shrink. */
1058 count = lov->desc.ld_tgt_count;
1060 for (i = next_idx, tgt = lov->tgts + i; i < count; i++, tgt++) {
1061 if (lov_tgt_active(lov, tgt, 0)) {
1062 next_idx = (i + 1) % count;
1067 for (i = 0, tgt = lov->tgts; i < next_idx; i++, tgt++) {
1068 if (lov_tgt_active(lov, tgt, 0)) {
1069 next_idx = (i + 1) % count;
1077 static int lov_revalidate_md(struct obd_export *exp, struct obdo *src_oa,
1078 struct lov_stripe_md *ea,
1079 struct obd_trans_info *oti)
1081 struct obd_export *osc_exp;
1082 struct lov_obd *lov = &exp->exp_obd->u.lov;
1083 struct lov_stripe_md *lsm = ea;
1084 struct lov_stripe_md obj_md;
1085 struct lov_stripe_md *obj_mdp = &obj_md;
1086 struct lov_oinfo *loi;
1087 struct obdo *tmp_oa;
1088 int ost_idx, updates = 0, i;
1091 tmp_oa = obdo_alloc();
1095 loi = lsm->lsm_oinfo;
1096 for (i = 0; i < lsm->lsm_stripe_count; i++, loi++) {
1097 struct lov_tgt_desc *tgt;
1100 if (!lov_tgt_changed(lov, loi))
1103 /* returns an active tgt. tgt->ltd_refcount is incremented. */
1104 ost_idx = lov_revalidate_policy(lov, lsm);
1106 /* FIXME: punt for now. */
1107 CERROR("lov_revalidate_policy failed; no active "
1112 /* create a new object */
1113 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1114 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1115 tgt = lov->tgts + ost_idx;
1116 osc_exp = tgt->ltd_exp;
1117 rc = obd_create(osc_exp, tmp_oa, NULL, 0, &obj_mdp, oti);
1119 lov_tgt_decref(lov, tgt);
1120 CERROR("error creating new subobj at idx %d; "
1121 "rc = %d\n", ost_idx, rc);
1126 "replacing idx %d gen %d objid "LPX64" subobj "LPX64" "
1127 "with idx %d gen %d objid "LPX64" subobj "LPX64".\n",
1128 loi->loi_ost_idx, loi->loi_ost_gen,
1129 loi->loi_id, loi->loi_gr,
1130 ost_idx, tgt->ltd_gen, tmp_oa->o_id, tmp_oa->o_gr);
1133 oti->oti_objid[ost_idx] = tmp_oa->o_id;
1134 loi->loi_id = tmp_oa->o_id;
1135 loi->loi_gr = tmp_oa->o_gr;
1136 loi->loi_ost_idx = ost_idx;
1137 loi->loi_ost_gen = tgt->ltd_gen;
1138 lov_tgt_decref(lov, tgt);
1142 /* If we got an error revalidating an entry there's no need to
1143 * cleanup up objects we allocated here because the bad entry
1144 * still points to a deleted OST. */
1150 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1151 * we can send this 'punch' to just the authoritative node and the nodes
1152 * that the punch will affect. */
1153 static int lov_punch(struct obd_export *exp, struct obdo *oa,
1154 struct lov_stripe_md *lsm, obd_off start,
1155 obd_off end, struct obd_trans_info *oti,
1156 struct lustre_capa *capa)
1158 struct lov_request_set *set;
1159 struct lov_obd *lov;
1160 struct list_head *pos;
1161 struct lov_request *req;
1162 int err = 0, rc = 0;
1165 if (lsm_bad_magic(lsm))
1168 if (!exp || !exp->exp_obd)
1171 lov = &exp->exp_obd->u.lov;
1172 rc = lov_prep_punch_set(exp, oa, lsm, start, end, oti, &set);
1176 list_for_each (pos, &set->set_list) {
1177 req = list_entry(pos, struct lov_request, rq_link);
1179 rc = obd_punch(lov->tgts[req->rq_idx].ltd_exp, req->rq_oa,
1180 NULL, req->rq_extent.start,
1181 req->rq_extent.end, NULL, capa);
1182 err = lov_update_punch_set(set, req, rc);
1184 CERROR("error: punch objid "LPX64" subobj "LPX64
1185 " on OST idx %d: rc = %d\n", set->set_oa->o_id,
1186 req->rq_oa->o_id, req->rq_idx, rc);
1191 err = lov_fini_punch_set(set);
1197 static int lov_sync(struct obd_export *exp, struct obdo *oa,
1198 struct lov_stripe_md *lsm, obd_off start, obd_off end)
1200 struct lov_request_set *set;
1201 struct lov_obd *lov;
1202 struct list_head *pos;
1203 struct lov_request *req;
1204 int err = 0, rc = 0;
1207 if (lsm_bad_magic(lsm))
1213 lov = &exp->exp_obd->u.lov;
1214 rc = lov_prep_sync_set(exp, oa, lsm, start, end, &set);
1218 list_for_each (pos, &set->set_list) {
1219 req = list_entry(pos, struct lov_request, rq_link);
1221 rc = obd_sync(lov->tgts[req->rq_idx].ltd_exp, req->rq_oa,
1222 NULL, req->rq_extent.start, req->rq_extent.end);
1223 err = lov_update_common_set(set, req, rc);
1225 CERROR("error: fsync objid "LPX64" subobj "LPX64
1226 " on OST idx %d: rc = %d\n", set->set_oa->o_id,
1227 req->rq_oa->o_id, req->rq_idx, rc);
1232 err = lov_fini_sync_set(set);
1238 static int lov_brw_check(struct lov_obd *lov, struct obdo *oa,
1239 struct lov_stripe_md *lsm,
1240 obd_count oa_bufs, struct brw_page *pga)
1245 /* The caller just wants to know if there's a chance that this
1246 * I/O can succeed */
1247 for (i = 0; i < oa_bufs; i++) {
1248 struct lov_oinfo *loi;
1249 struct lov_tgt_desc *tgt;
1253 if (!lov_stripe_intersects(lsm, i, pga[i].disk_offset,
1254 pga[i].disk_offset + pga[i].count,
1258 stripe = lov_stripe_number(lsm, pga[i].disk_offset);
1259 loi = lsm->lsm_oinfo + stripe;
1260 tgt = lov->tgts + loi->loi_ost_idx;
1262 if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1263 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1266 rc = obd_brw(OBD_BRW_CHECK, tgt->ltd_exp, oa,
1267 NULL, 1, &pga[i], NULL);
1268 lov_tgt_decref(lov, tgt);
1275 static int lov_brw(int cmd, struct obd_export *exp, struct obdo *src_oa,
1276 struct lov_stripe_md *lsm, obd_count oa_bufs,
1277 struct brw_page *pga, struct obd_trans_info *oti)
1279 struct lov_request_set *set;
1280 struct lov_request *req;
1281 struct list_head *pos;
1282 struct lov_obd *lov = &exp->exp_obd->u.lov;
1286 if (lsm_bad_magic(lsm))
1289 if (cmd == OBD_BRW_CHECK) {
1290 rc = lov_brw_check(lov, src_oa, lsm, oa_bufs, pga);
1294 rc = lov_prep_brw_set(exp, src_oa, lsm, oa_bufs, pga, oti, &set);
1298 list_for_each (pos, &set->set_list) {
1299 struct obd_export *sub_exp;
1300 struct brw_page *sub_pga;
1301 req = list_entry(pos, struct lov_request, rq_link);
1303 sub_exp = lov->tgts[req->rq_idx].ltd_exp;
1304 sub_pga = set->set_pga + req->rq_pgaidx;
1305 rc = obd_brw(cmd, sub_exp, req->rq_oa, req->rq_md,
1306 req->rq_oabufs, sub_pga, oti);
1309 lov_update_common_set(set, req, rc);
1312 err = lov_fini_brw_set(set);
1318 static int lov_brw_interpret(struct ptlrpc_request_set *reqset, void *data,
1321 struct lov_request_set *lovset = (struct lov_request_set *)data;
1325 lovset->set_completes = 0;
1326 lov_fini_brw_set(lovset);
1328 rc = lov_fini_brw_set(lovset);
1334 static int lov_brw_async(int cmd, struct obd_export *exp, struct obdo *oa,
1335 struct lov_stripe_md *lsm, obd_count oa_bufs,
1336 struct brw_page *pga, struct ptlrpc_request_set *set,
1337 struct obd_trans_info *oti)
1339 struct lov_request_set *lovset;
1340 struct lov_request *req;
1341 struct list_head *pos;
1342 struct lov_obd *lov = &exp->exp_obd->u.lov;
1346 if (lsm_bad_magic(lsm))
1349 if (cmd == OBD_BRW_CHECK) {
1350 rc = lov_brw_check(lov, oa, lsm, oa_bufs, pga);
1354 rc = lov_prep_brw_set(exp, oa, lsm, oa_bufs, pga, oti, &lovset);
1358 list_for_each (pos, &lovset->set_list) {
1359 struct obd_export *sub_exp;
1360 struct brw_page *sub_pga;
1361 req = list_entry(pos, struct lov_request, rq_link);
1363 sub_exp = lov->tgts[req->rq_idx].ltd_exp;
1364 sub_pga = lovset->set_pga + req->rq_pgaidx;
1365 rc = obd_brw_async(cmd, sub_exp, req->rq_oa, req->rq_md,
1366 req->rq_oabufs, sub_pga, set, oti);
1369 lov_update_common_set(lovset, req, rc);
1372 LASSERT(set->set_interpret == NULL);
1373 set->set_interpret = (set_interpreter_func)lov_brw_interpret;
1374 set->set_arg = (void *)lovset;
1378 lov_fini_brw_set(lovset);
1382 static int lov_ap_make_ready(void *data, int cmd)
1384 struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1386 return lap->lap_caller_ops->ap_make_ready(lap->lap_caller_data, cmd);
1388 static int lov_ap_refresh_count(void *data, int cmd)
1390 struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1392 return lap->lap_caller_ops->ap_refresh_count(lap->lap_caller_data,
1395 static void lov_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
1397 struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1399 lap->lap_caller_ops->ap_fill_obdo(lap->lap_caller_data, cmd, oa);
1400 /* XXX woah, shouldn't we be altering more here? size? */
1401 oa->o_id = lap->lap_loi_id;
1404 static void lov_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
1406 struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1408 /* in a raid1 regime this would down a count of many ios
1409 * in flight, onl calling the caller_ops completion when all
1410 * the raid1 ios are complete */
1411 lap->lap_caller_ops->ap_completion(lap->lap_caller_data, cmd, oa, rc);
1414 static struct obd_async_page_ops lov_async_page_ops = {
1415 .ap_make_ready = lov_ap_make_ready,
1416 .ap_refresh_count = lov_ap_refresh_count,
1417 .ap_fill_obdo = lov_ap_fill_obdo,
1418 .ap_completion = lov_ap_completion,
1421 static int lov_prep_async_page(struct obd_export *exp,
1422 struct lov_stripe_md *lsm,
1423 struct lov_oinfo *loi, struct page *page,
1424 obd_off offset, struct obd_async_page_ops *ops,
1425 void *data, void **res)
1427 struct lov_obd *lov = &exp->exp_obd->u.lov;
1428 struct lov_tgt_desc *tgt;
1429 struct lov_async_page *lap;
1433 if (lsm_bad_magic(lsm))
1435 LASSERT(loi == NULL);
1437 stripe = lov_stripe_number(lsm, offset);
1438 loi = &lsm->lsm_oinfo[stripe];
1440 OBD_ALLOC(lap, sizeof(*lap));
1444 lap->lap_magic = LAP_MAGIC;
1445 lap->lap_caller_ops = ops;
1446 lap->lap_caller_data = data;
1448 /* FIXME handle multiple oscs after landing b_raid1 */
1449 lap->lap_stripe = stripe;
1450 switch (lsm->lsm_pattern) {
1451 case LOV_PATTERN_RAID0:
1452 lov_stripe_offset(lsm, offset, lap->lap_stripe,
1453 &lap->lap_sub_offset);
1455 case LOV_PATTERN_CMOBD:
1456 lap->lap_sub_offset = offset;
1462 /* so the callback doesn't need the lsm */
1463 lap->lap_loi_id = loi->loi_id;
1465 tgt = lov->tgts + loi->loi_ost_idx;
1467 if (lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1468 rc = obd_prep_async_page(tgt->ltd_exp, lsm, loi, page,
1469 lap->lap_sub_offset,
1470 &lov_async_page_ops, lap,
1471 &lap->lap_sub_cookie);
1477 OBD_FREE(lap, sizeof(*lap));
1480 CDEBUG(D_CACHE, "lap %p page %p cookie %p off "LPU64"\n", lap, page,
1481 lap->lap_sub_cookie, offset);
1486 static int lov_queue_async_io(struct obd_export *exp,
1487 struct lov_stripe_md *lsm,
1488 struct lov_oinfo *loi, void *cookie,
1489 int cmd, obd_off off, int count,
1490 obd_flags brw_flags, obd_flags async_flags)
1492 struct lov_obd *lov = &exp->exp_obd->u.lov;
1493 struct lov_tgt_desc *tgt;
1494 struct lov_async_page *lap;
1497 LASSERT(loi == NULL);
1499 if (lsm_bad_magic(lsm))
1502 lap = LAP_FROM_COOKIE(cookie);
1503 loi = &lsm->lsm_oinfo[lap->lap_stripe];
1504 tgt = lov->tgts + loi->loi_ost_idx;
1506 if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen))
1509 rc = obd_queue_async_io(tgt->ltd_exp, lsm, loi, lap->lap_sub_cookie,
1510 cmd, off, count, brw_flags, async_flags);
1512 lov_tgt_decref(lov, tgt);
1516 static int lov_set_async_flags(struct obd_export *exp,
1517 struct lov_stripe_md *lsm,
1518 struct lov_oinfo *loi, void *cookie,
1519 obd_flags async_flags)
1521 struct lov_obd *lov = &exp->exp_obd->u.lov;
1522 struct lov_tgt_desc *tgt;
1523 struct lov_async_page *lap;
1526 LASSERT(loi == NULL);
1528 if (lsm_bad_magic(lsm))
1531 lap = LAP_FROM_COOKIE(cookie);
1532 loi = &lsm->lsm_oinfo[lap->lap_stripe];
1533 tgt = lov->tgts + loi->loi_ost_idx;
1535 if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen))
1538 rc = obd_set_async_flags(tgt->ltd_exp, lsm, loi, lap->lap_sub_cookie,
1541 lov_tgt_decref(lov, tgt);
1545 static int lov_queue_group_io(struct obd_export *exp,
1546 struct lov_stripe_md *lsm,
1547 struct lov_oinfo *loi,
1548 struct obd_io_group *oig, void *cookie,
1549 int cmd, obd_off off, int count,
1550 obd_flags brw_flags, obd_flags async_flags)
1552 struct lov_obd *lov = &exp->exp_obd->u.lov;
1553 struct lov_tgt_desc *tgt;
1554 struct lov_async_page *lap;
1557 LASSERT(loi == NULL);
1559 if (lsm_bad_magic(lsm))
1562 lap = LAP_FROM_COOKIE(cookie);
1563 loi = &lsm->lsm_oinfo[lap->lap_stripe];
1564 tgt = lov->tgts + loi->loi_ost_idx;
1566 if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen))
1569 rc = obd_queue_group_io(tgt->ltd_exp, lsm, loi, oig,
1570 lap->lap_sub_cookie, cmd, off, count,
1571 brw_flags, async_flags);
1573 lov_tgt_decref(lov, tgt);
1577 /* this isn't exactly optimal. we may have queued sync io in oscs on
1578 * all stripes, but we don't record that fact at queue time. so we
1579 * trigger sync io on all stripes. */
1580 static int lov_trigger_group_io(struct obd_export *exp,
1581 struct lov_stripe_md *lsm,
1582 struct lov_oinfo *loi,
1583 struct obd_io_group *oig)
1585 struct lov_obd *lov = &exp->exp_obd->u.lov;
1588 LASSERT(loi == NULL);
1590 if (lsm_bad_magic(lsm))
1593 loi = lsm->lsm_oinfo;
1594 for (i = 0; i < lsm->lsm_stripe_count; i++, loi++) {
1595 struct lov_tgt_desc *tgt = lov->tgts + loi->loi_ost_idx;
1597 if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1598 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1602 err = obd_trigger_group_io(tgt->ltd_exp, lsm, loi, oig);
1604 lov_tgt_decref(lov, tgt);
1606 if (rc == 0 && err != 0)
1612 static int lov_teardown_async_page(struct obd_export *exp,
1613 struct lov_stripe_md *lsm,
1614 struct lov_oinfo *loi, void *cookie)
1616 struct lov_obd *lov = &exp->exp_obd->u.lov;
1617 struct lov_tgt_desc *tgt;
1618 struct lov_async_page *lap;
1622 LASSERT(loi == NULL);
1624 if (lsm_bad_magic(lsm))
1627 lap = LAP_FROM_COOKIE(cookie);
1629 loi = &lsm->lsm_oinfo[lap->lap_stripe];
1630 tgt = lov->tgts + loi->loi_ost_idx;
1632 rc = obd_teardown_async_page(tgt->ltd_exp, lsm, loi,
1633 lap->lap_sub_cookie);
1634 lov_tgt_decref(lov, tgt);
1637 CERROR("unable to teardown sub cookie %p: %d\n",
1638 lap->lap_sub_cookie, rc);
1641 OBD_FREE(lap, sizeof(*lap));
1645 static int lov_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm,
1646 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
1647 int *flags, void *bl_cb, void *cp_cb, void *gl_cb,
1648 void *data,__u32 lvb_len, void *lvb_swabber,
1649 struct lustre_handle *lockh)
1651 struct lov_request_set *set;
1652 struct lov_request *req;
1653 struct list_head *pos;
1654 struct lustre_handle *lov_lockhp;
1655 struct lov_obd *lov;
1657 int save_flags = *flags;
1660 if (lsm_bad_magic(lsm))
1663 /* we should never be asked to replay a lock this way. */
1664 LASSERT((*flags & LDLM_FL_REPLAY) == 0);
1666 if (!exp || !exp->exp_obd)
1669 lov = &exp->exp_obd->u.lov;
1670 rc = lov_prep_enqueue_set(exp, lsm, policy, mode, lockh, &set);
1674 list_for_each (pos, &set->set_list) {
1675 ldlm_policy_data_t sub_policy;
1676 req = list_entry(pos, struct lov_request, rq_link);
1677 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1678 LASSERT(lov_lockhp);
1680 *flags = save_flags;
1681 sub_policy.l_extent.start = req->rq_extent.start;
1682 sub_policy.l_extent.end = req->rq_extent.end;
1684 rc = obd_enqueue(lov->tgts[req->rq_idx].ltd_exp, req->rq_md,
1685 type, &sub_policy, mode, flags, bl_cb,
1686 cp_cb, gl_cb, data, lvb_len, lvb_swabber,
1688 rc = lov_update_enqueue_set(set, req, rc, save_flags);
1693 lov_fini_enqueue_set(set, mode);
1697 static int lov_match(struct obd_export *exp, struct lov_stripe_md *lsm,
1698 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
1699 int *flags, void *data, struct lustre_handle *lockh)
1701 struct lov_request_set *set;
1702 struct lov_request *req;
1703 struct list_head *pos;
1704 struct lov_obd *lov = &exp->exp_obd->u.lov;
1705 struct lustre_handle *lov_lockhp;
1706 int lov_flags, rc = 0;
1709 if (lsm_bad_magic(lsm))
1712 if (!exp || !exp->exp_obd)
1715 lov = &exp->exp_obd->u.lov;
1716 rc = lov_prep_match_set(exp, lsm, policy, mode, lockh, &set);
1720 list_for_each (pos, &set->set_list) {
1721 ldlm_policy_data_t sub_policy;
1722 req = list_entry(pos, struct lov_request, rq_link);
1723 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1724 LASSERT(lov_lockhp);
1726 sub_policy.l_extent.start = req->rq_extent.start;
1727 sub_policy.l_extent.end = req->rq_extent.end;
1730 rc = obd_match(lov->tgts[req->rq_idx].ltd_exp, req->rq_md,
1731 type, &sub_policy, mode, &lov_flags, data,
1733 rc = lov_update_match_set(set, req, rc);
1737 lov_fini_match_set(set, mode, *flags);
1741 static int lov_change_cbdata(struct obd_export *exp,
1742 struct lov_stripe_md *lsm, ldlm_iterator_t it,
1745 struct lov_obd *lov;
1746 struct lov_oinfo *loi;
1750 if (lsm_bad_magic(lsm))
1753 if (!exp || !exp->exp_obd)
1756 LASSERT(lsm->lsm_object_gr > 0);
1758 lov = &exp->exp_obd->u.lov;
1759 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
1760 struct lov_tgt_desc *tgt = lov->tgts + loi->loi_ost_idx;
1761 struct lov_stripe_md submd;
1763 submd.lsm_object_id = loi->loi_id;
1764 submd.lsm_object_gr = lsm->lsm_object_gr;
1765 submd.lsm_stripe_count = 0;
1766 rc = obd_change_cbdata(tgt->ltd_exp, &submd, it, data);
1767 lov_tgt_decref(lov, tgt);
1772 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1773 __u32 mode, struct lustre_handle *lockh)
1775 struct lov_request_set *set;
1776 struct lov_request *req;
1777 struct list_head *pos;
1778 struct lov_obd *lov = &exp->exp_obd->u.lov;
1779 struct lustre_handle *lov_lockhp;
1780 int err = 0, rc = 0;
1783 if (lsm_bad_magic(lsm))
1786 if (!exp || !exp->exp_obd)
1789 LASSERT(lsm->lsm_object_gr > 0);
1792 lov = &exp->exp_obd->u.lov;
1793 rc = lov_prep_cancel_set(exp, lsm, mode, lockh, &set);
1797 list_for_each (pos, &set->set_list) {
1798 req = list_entry(pos, struct lov_request, rq_link);
1799 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1801 rc = obd_cancel(lov->tgts[req->rq_idx].ltd_exp, req->rq_md,
1803 rc = lov_update_common_set(set, req, rc);
1805 CERROR("error: cancel objid "LPX64" subobj "
1806 LPX64" on OST idx %d: rc = %d\n",
1808 req->rq_md->lsm_object_id, req->rq_idx, rc);
1813 lov_fini_cancel_set(set);
1817 static int lov_cancel_unused(struct obd_export *exp,
1818 struct lov_stripe_md *lsm,
1819 int flags, void *opaque)
1821 struct lov_obd *lov;
1822 struct lov_oinfo *loi;
1823 struct lov_tgt_desc *tgt;
1827 lov = &exp->exp_obd->u.lov;
1830 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
1833 if (lov_tgt_ready(lov, tgt, 0)) {
1834 err = obd_cancel_unused(tgt->ltd_exp, NULL,
1836 lov_tgt_decref(lov, tgt);
1838 if (obd_uuid_empty(&tgt->uuid))
1840 CERROR("error: cancel unused "
1841 "OST idx %d: OST inactive.\n", i);
1850 if (lsm_bad_magic(lsm))
1853 if (!exp || !exp->exp_obd)
1856 LASSERT(lsm->lsm_object_gr > 0);
1858 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
1859 struct lov_stripe_md submd;
1862 submd.lsm_object_id = loi->loi_id;
1863 submd.lsm_object_gr = lsm->lsm_object_gr;
1864 submd.lsm_stripe_count = 0;
1866 tgt = lov->tgts + loi->loi_ost_idx;
1867 if (lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1868 err = obd_cancel_unused(tgt->ltd_exp, &submd, flags,
1870 lov_tgt_decref(lov, tgt);
1871 if (err && lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1872 lov_tgt_decref(lov, tgt);
1873 CERROR("error: cancel unused objid "LPX64" "
1874 "subobj "LPX64" OST idx %d: rc = %d\n",
1875 lsm->lsm_object_id, loi->loi_id,
1876 loi->loi_ost_idx, err);
1880 CERROR("error: cancel unused objid "LPX64" "
1881 "subobj "LPX64" on OST idx %d: OST inactive.\n",
1883 loi->loi_id, loi->loi_ost_idx);
1892 #define LOV_U64_MAX ((__u64)~0ULL)
1893 #define LOV_SUM_MAX(tot, add) \
1895 if ((tot) + (add) < (tot)) \
1896 (tot) = LOV_U64_MAX; \
1901 static int lov_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1902 unsigned long max_age)
1904 struct lov_obd *lov = &obd->u.lov;
1905 struct lov_tgt_desc *tgt = lov->tgts;
1906 struct obd_statfs lov_sfs;
1913 /* We only get block data from the OBD */
1914 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
1917 if (!lov_tgt_active(lov, tgt, 0)) {
1918 CDEBUG(D_HA, "lov idx %d inactive\n", i);
1922 err = obd_statfs(class_exp2obd(tgt->ltd_exp), &lov_sfs,max_age);
1923 lov_tgt_decref(lov, tgt);
1925 if (lov_tgt_active(lov, tgt, 0)) {
1926 lov_tgt_decref(lov, tgt);
1934 memcpy(osfs, &lov_sfs, sizeof(lov_sfs));
1937 osfs->os_bfree += lov_sfs.os_bfree;
1938 osfs->os_bavail += lov_sfs.os_bavail;
1939 osfs->os_blocks += lov_sfs.os_blocks;
1940 /* XXX not sure about this one - depends on policy.
1941 * - could be minimum if we always stripe on all OBDs
1942 * (but that would be wrong for any other policy,
1943 * if one of the OBDs has no more objects left)
1944 * - could be sum if we stripe whole objects
1945 * - could be average, just to give a nice number
1947 * To give a "reasonable" (if not wholly accurate)
1948 * number, we divide the total number of free objects
1949 * by expected stripe count (watch out for overflow).
1951 LOV_SUM_MAX(osfs->os_files, lov_sfs.os_files);
1952 LOV_SUM_MAX(osfs->os_ffree, lov_sfs.os_ffree);
1957 __u32 expected_stripes = lov->desc.ld_default_stripe_count ?
1958 lov->desc.ld_default_stripe_count :
1959 lov->desc.ld_active_tgt_count;
1961 if ((lov->desc.ld_default_stripe_count == 0) ||
1962 (lov->desc.ld_default_stripe_count >
1963 lov->desc.ld_active_tgt_count)) {
1964 expected_stripes = lov->desc.ld_active_tgt_count;
1966 expected_stripes = lov->desc.ld_default_stripe_count;
1969 if (osfs->os_files != LOV_U64_MAX)
1970 do_div(osfs->os_files, expected_stripes);
1971 if (osfs->os_ffree != LOV_U64_MAX)
1972 do_div(osfs->os_ffree, expected_stripes);
1979 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1980 void *karg, void *uarg)
1982 struct obd_device *obddev = class_exp2obd(exp);
1983 struct lov_obd *lov = &obddev->u.lov;
1984 struct lov_tgt_desc *tgt;
1985 int i, rc, count = lov->desc.ld_tgt_count;
1986 struct obd_uuid *uuidp;
1990 case OBD_IOC_LOV_GET_CONFIG: {
1991 struct obd_ioctl_data *data = karg;
1992 struct lov_desc *desc;
1998 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
2001 data = (struct obd_ioctl_data *)buf;
2003 if (sizeof(*desc) > data->ioc_inllen1) {
2004 obd_ioctl_freedata(buf, len);
2008 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
2009 obd_ioctl_freedata(buf, len);
2013 if (sizeof(__u32) * count > data->ioc_inllen3) {
2014 obd_ioctl_freedata(buf, len);
2018 desc = (struct lov_desc *)data->ioc_inlbuf1;
2019 memcpy(desc, &(lov->desc), sizeof(*desc));
2021 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2022 genp = (__u32 *)data->ioc_inlbuf3;
2023 /* the uuid will be empty for deleted OSTs */
2026 for (i = 0; i < count; i++, uuidp++, genp++, tgt++) {
2027 obd_str2uuid(uuidp, (char *)tgt->uuid.uuid);
2028 *genp = tgt->ltd_gen;
2030 lov_tgts_unlock(lov);
2032 rc = copy_to_user((void *)uarg, buf, len);
2035 obd_ioctl_freedata(buf, len);
2038 case LL_IOC_LOV_SETSTRIPE:
2039 rc = lov_setstripe(exp, karg, uarg);
2041 case LL_IOC_LOV_GETSTRIPE:
2042 rc = lov_getstripe(exp, karg, uarg);
2044 case LL_IOC_LOV_SETEA:
2045 rc = lov_setea(exp, karg, uarg);
2052 for (i = 0, tgt = lov->tgts; i < count; i++, tgt++) {
2055 if (!lov_tgt_active(lov, tgt, 0)) {
2056 CERROR("error: iocontrol failed for OSC %s on "
2057 "OST idx %d: OST inactive.\n",
2064 err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
2065 lov_tgt_decref(lov, tgt);
2067 if (lov_tgt_ready(lov, tgt, 0)) {
2068 lov_tgt_decref(lov, tgt);
2069 CERROR("error: iocontrol OSC %s on OST "
2070 "idx %d cmd %x: err = %d\n",
2071 lov->tgts[i].uuid.uuid, i,
2087 static int lov_get_info(struct obd_export *exp, __u32 keylen,
2088 void *key, __u32 *vallen, void *val)
2090 struct obd_device *obddev = class_exp2obd(exp);
2091 struct lov_obd *lov = &obddev->u.lov;
2092 struct lov_tgt_desc *tgt;
2096 if (!vallen || !val)
2099 if (keylen > strlen("lock_to_stripe") &&
2100 strcmp(key, "lock_to_stripe") == 0) {
2103 struct ldlm_lock *lock;
2104 struct lov_stripe_md *lsm;
2106 struct lov_oinfo *loi;
2107 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2108 __u32 *stripe = val;
2110 if (*vallen < sizeof(*stripe))
2112 *vallen = sizeof(*stripe);
2114 /* XXX This is another one of those bits that will need to
2115 * change if we ever actually support nested LOVs. It uses
2116 * the lock's export to find out which stripe it is. */
2117 /* XXX - it's assumed all the locks for deleted OSTs have
2118 * been cancelled. Also, the export for deleted OSTs will
2119 * be NULL and won't match the lock's export. */
2121 for (i = 0, loi = data->lsm->lsm_oinfo;
2122 i < data->lsm->lsm_stripe_count;
2124 if (lov->tgts[loi->loi_ost_idx].ltd_exp ==
2125 data->lock->l_conn_export &&
2126 loi->loi_id == res_id->name[0] &&
2127 loi->loi_gr == res_id->name[2]) {
2128 lov_tgts_unlock(lov);
2133 lov_tgts_unlock(lov);
2134 LDLM_ERROR(data->lock, "lock on inode without such object");
2135 dump_lsm(D_ERROR, data->lsm);
2136 portals_debug_dumpstack(NULL);
2138 } else if (keylen >= strlen("size_to_stripe") &&
2139 strcmp(key, "size_to_stripe") == 0) {
2143 struct lov_stripe_md *lsm;
2146 if (*vallen < sizeof(*data))
2149 data->size = lov_size_to_stripe(data->lsm, data->size,
2150 data->stripe_number);
2152 } else if (keylen >= strlen("last_id") && strcmp(key, "last_id") == 0) {
2153 __u32 size = sizeof(obd_id);
2158 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
2159 if (!lov_tgt_active(lov, tgt, 0))
2161 rc = obd_get_info(tgt->ltd_exp, keylen, key, &size,
2163 lov_tgt_decref(lov, tgt);
2168 } else if (keylen >= strlen("lovdesc") && strcmp(key, "lovdesc") == 0) {
2169 struct lov_desc *desc_ret = val;
2170 *desc_ret = lov->desc;
2178 static int lov_set_info(struct obd_export *exp, obd_count keylen,
2179 void *key, obd_count vallen, void *val)
2181 struct obd_device *obddev = class_exp2obd(exp);
2182 struct lov_obd *lov = &obddev->u.lov;
2183 struct lov_tgt_desc *tgt;
2187 #define KEY_IS(str) \
2188 (keylen == strlen(str) && memcmp(key, str, keylen) == 0)
2190 if (KEY_IS("async")) {
2191 struct lov_desc *desc = &lov->desc;
2193 if (vallen != sizeof(int))
2195 lov->async = *((int*) val);
2199 for (i = 0; i < desc->ld_tgt_count; i++, tgt++) {
2200 struct obd_uuid *tgt_uuid = &tgt->uuid;
2201 struct obd_device *tgt_obd;
2203 tgt_obd = class_find_client_obd(tgt_uuid,
2207 CERROR("Target %s not attached\n",
2214 err = obd_set_info(tgt_obd->obd_self_export,
2215 keylen, key, vallen, val);
2217 CERROR("Failed to set async on target %s\n",
2223 lov_tgts_unlock(lov);
2227 if (KEY_IS("mds_conn")) {
2228 if (vallen != sizeof(__u32))
2230 } else if (KEY_IS("unlinked") || KEY_IS("unrecovery")) {
2233 } else if (KEY_IS("sec") || KEY_IS("sec_flags")) {
2234 struct lov_tgt_desc *tgt;
2235 struct obd_export *exp;
2240 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
2242 /* during setup time the connections to osc might
2243 * haven't been established.
2246 struct obd_device *tgt_obd;
2248 tgt_obd = class_find_client_obd(&tgt->uuid,
2252 CERROR("can't set security flavor, "
2253 "device %s not attached?\n",
2258 exp = tgt_obd->obd_self_export;
2261 err = obd_set_info(exp, keylen, key, vallen, val);
2265 lov_tgts_unlock(lov);
2268 } else if (KEY_IS("auditlog")) {
2270 struct audit_msg * msg = val;
2271 int i = 0, len = sizeof(nid);
2272 struct obd_export * ost_exp;
2273 //try to find client nid
2274 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2275 if (!lov->tgts[i].ltd_exp)
2277 rc = obd_get_info(lov->tgts[i].ltd_exp, 10,
2278 "client_nid", &len, &nid);
2283 i = (__u32)nid % lov->desc.ld_tgt_count;
2285 CDEBUG(D_INFO, "Select OST %i for nid %.8x\n",i, (__u32)nid);
2287 ost_exp = lov->tgts[i].ltd_exp;
2289 CERROR("can't send auditlog data,"
2290 "device %s is not attached?\n",
2291 lov->tgts[i].uuid.uuid);
2295 rc = obd_set_info(ost_exp, keylen, key, vallen, val);
2298 } else if (KEY_IS("audit_obj")) {
2299 struct audit_lov_msg * msg = val;
2301 struct obd_export * ost_exp;
2302 struct lov_oinfo *loi;
2303 struct obdo *oa = NULL;
2309 //set audit for all objects of file
2310 CDEBUG(D_INFO, "Set audit 0x%x for objects\n", (__u32)msg->mask);
2311 //use o_fid to store audit mask
2312 oa->o_fid = msg->mask;
2313 oa->o_uid = msg->uid;
2314 oa->o_gid = msg->gid;
2315 //iterate over all objects and set audit for each
2316 for (i = 0, loi = msg->lsm->lsm_oinfo;
2317 i < msg->lsm->lsm_stripe_count; i++, loi++) {
2318 index = loi->loi_ost_idx;
2319 ost_exp = lov->tgts[index].ltd_exp;
2321 CERROR("can't send audit_obj data,"
2322 "device %s is not attached?\n",
2323 lov->tgts[i].uuid.uuid);
2326 oa->o_id = loi->loi_id;
2327 oa->o_gr = loi->loi_gr;
2329 obd_set_info(ost_exp, keylen, key, sizeof(*oa), oa);
2334 } else if (KEY_IS("audit")) {
2336 struct obd_export * ost_exp;
2338 //set audit for whole fs on OSS
2339 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2340 ost_exp = lov->tgts[i].ltd_exp;
2342 CERROR("can't send audit_fs data,"
2343 "device %s is not attached?\n",
2344 lov->tgts[i].uuid.uuid);
2347 obd_set_info(ost_exp, keylen, key, vallen, val);
2351 } else if (KEY_IS("flush_cred") || KEY_IS("crypto_cb") ||
2352 KEY_IS("capa_key")) {
2353 struct lov_tgt_desc *tgt;
2357 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
2358 if (!lov_tgt_active(lov, tgt, 0))
2360 rc = obd_set_info(tgt->ltd_exp,
2361 keylen, key, vallen, val);
2362 lov_tgt_decref(lov, tgt);
2368 } else if (KEY_IS("setext")) {
2369 struct lov_tgt_desc *tgt;
2372 for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count;
2376 rc = obd_set_info(tgt->ltd_exp,
2377 keylen, key, vallen, val);
2388 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
2392 if (!obd_uuid_equals(val, &tgt->uuid))
2394 } else if (!lov_tgt_active(lov, tgt, 0)) {
2400 err = obd_set_info(tgt->ltd_exp, keylen, key, vallen, val);
2404 lov_tgt_decref(lov, tgt);
2411 struct lov_multi_wait {
2412 struct ldlm_lock *lock;
2418 int lov_complete_many(struct obd_export *exp, struct lov_stripe_md *lsm,
2419 struct lustre_handle *lockh)
2421 struct lov_lock_handles *lov_lockh = NULL;
2422 struct lustre_handle *lov_lockhp;
2423 struct lov_obd *lov;
2424 struct lov_oinfo *loi;
2425 struct lov_multi_wait *queues;
2429 if (lsm_bad_magic(lsm))
2432 if (!exp || !exp->exp_obd)
2435 LASSERT(lockh != NULL);
2436 if (lsm->lsm_stripe_count > 1) {
2437 lov_lockh = lov_handle2llh(lockh);
2438 if (lov_lockh == NULL) {
2439 CERROR("LOV: invalid lov lock handle %p\n", lockh);
2443 lov_lockhp = lov_lockh->llh_handles;
2448 OBD_ALLOC(queues, lsm->lsm_stripe_count * sizeof(*queues));
2450 GOTO(out, rc = -ENOMEM);
2452 lov = &exp->exp_obd->u.lov;
2453 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2454 i++, loi++, lov_lockhp++) {
2455 struct ldlm_lock *lock;
2456 struct obd_device *obd;
2457 unsigned long irqflags;
2459 lock = ldlm_handle2lock(lov_lockhp);
2461 CDEBUG(D_HA, "lov idx %d subobj "LPX64" no lock?\n",
2462 loi->loi_ost_idx, loi->loi_id);
2463 queues[i].completed = 1;
2467 queues[i].lock = lock;
2468 init_waitqueue_entry(&(queues[i].wait), current);
2469 add_wait_queue(lock->l_waitq, &(queues[i].wait));
2471 obd = class_exp2obd(lock->l_conn_export);
2473 imp = obd->u.cli.cl_import;
2475 spin_lock_irqsave(&imp->imp_lock, irqflags);
2476 queues[i].generation = imp->imp_generation;
2477 spin_unlock_irqrestore(&imp->imp_lock, irqflags);
2481 lwi = LWI_TIMEOUT_INTR(obd_timeout * HZ, ldlm_expired_completion_wait,
2482 interrupted_completion_wait, &lwd);
2483 rc = l_wait_event_added(check_multi_complete(queues, lsm), &lwi);
2485 for (i = 0; i < lsm->lsm_stripe_count; i++)
2486 remove_wait_queue(lock->l_waitq, &(queues[i].wait));
2488 if (rc == -EINTR || rc == -ETIMEDOUT) {
2494 if (lov_lockh != NULL)
2495 lov_llh_put(lov_lockh);
2500 struct obd_ops lov_obd_ops = {
2501 .o_owner = THIS_MODULE,
2502 .o_attach = lov_attach,
2503 .o_detach = lov_detach,
2504 .o_setup = lov_setup,
2505 .o_cleanup = lov_cleanup,
2506 .o_process_config = lov_process_config,
2507 .o_connect = lov_connect,
2508 .o_disconnect = lov_disconnect,
2509 .o_statfs = lov_statfs,
2510 .o_packmd = lov_packmd,
2511 .o_unpackmd = lov_unpackmd,
2512 .o_revalidate_md = lov_revalidate_md,
2513 .o_create = lov_create,
2514 .o_destroy = lov_destroy,
2515 .o_getattr = lov_getattr,
2516 .o_getattr_async = lov_getattr_async,
2517 .o_setattr = lov_setattr,
2519 .o_brw_async = lov_brw_async,
2520 .o_prep_async_page = lov_prep_async_page,
2521 .o_queue_async_io = lov_queue_async_io,
2522 .o_set_async_flags = lov_set_async_flags,
2523 .o_queue_group_io = lov_queue_group_io,
2524 .o_trigger_group_io = lov_trigger_group_io,
2525 .o_teardown_async_page = lov_teardown_async_page,
2526 .o_adjust_kms = lov_adjust_kms,
2527 .o_punch = lov_punch,
2529 .o_enqueue = lov_enqueue,
2530 .o_match = lov_match,
2531 .o_change_cbdata = lov_change_cbdata,
2532 .o_cancel = lov_cancel,
2533 .o_cancel_unused = lov_cancel_unused,
2534 .o_iocontrol = lov_iocontrol,
2535 .o_get_info = lov_get_info,
2536 .o_set_info = lov_set_info,
2537 .o_llog_init = lov_llog_init,
2538 .o_llog_finish = lov_llog_finish,
2539 .o_notify = lov_notify,
2542 int __init lov_init(void)
2544 struct lprocfs_static_vars lvars;
2548 lprocfs_init_vars(lov, &lvars);
2549 rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
2550 OBD_LOV_DEVICENAME);
2555 static void /*__exit*/ lov_exit(void)
2557 class_unregister_type(OBD_LOV_DEVICENAME);
2560 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2561 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2562 MODULE_LICENSE("GPL");
2564 module_init(lov_init);
2565 module_exit(lov_exit);