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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/lov/lov_obd.c
38 * Author: Phil Schwan <phil@clusterfs.com>
39 * Author: Peter Braam <braam@clusterfs.com>
40 * Author: Mike Shaver <shaver@clusterfs.com>
41 * Author: Nathan Rutman <nathan@clusterfs.com>
44 #define DEBUG_SUBSYSTEM S_LOV
46 #include <libcfs/libcfs.h>
48 #include <liblustre.h>
51 #include <obd_support.h>
52 #include <lustre_lib.h>
53 #include <lustre_net.h>
54 #include <lustre/lustre_idl.h>
55 #include <lustre_dlm.h>
56 #include <lustre_mds.h>
57 #include <obd_class.h>
58 #include <lprocfs_status.h>
59 #include <lustre_param.h>
60 #include <cl_object.h>
62 #include <lustre/ll_fiemap.h>
63 #include <lustre_fid.h>
65 #include "lov_internal.h"
67 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
68 Any function that expects lov_tgts to remain stationary must take a ref. */
69 static void lov_getref(struct obd_device *obd)
71 struct lov_obd *lov = &obd->u.lov;
73 /* nobody gets through here until lov_putref is done */
74 mutex_lock(&lov->lov_lock);
75 cfs_atomic_inc(&lov->lov_refcount);
76 mutex_unlock(&lov->lov_lock);
80 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
82 static void lov_putref(struct obd_device *obd)
84 struct lov_obd *lov = &obd->u.lov;
86 mutex_lock(&lov->lov_lock);
87 /* ok to dec to 0 more than once -- ltd_exp's will be null */
88 if (cfs_atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
91 struct lov_tgt_desc *tgt, *n;
92 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
94 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
95 tgt = lov->lov_tgts[i];
97 if (!tgt || !tgt->ltd_reap)
99 cfs_list_add(&tgt->ltd_kill, &kill);
100 /* XXX - right now there is a dependency on ld_tgt_count
101 * being the maximum tgt index for computing the
102 * mds_max_easize. So we can't shrink it. */
103 lov_ost_pool_remove(&lov->lov_packed, i);
104 lov->lov_tgts[i] = NULL;
105 lov->lov_death_row--;
107 mutex_unlock(&lov->lov_lock);
109 cfs_list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
110 cfs_list_del(&tgt->ltd_kill);
112 __lov_del_obd(obd, tgt);
115 mutex_unlock(&lov->lov_lock);
119 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
120 enum obd_notify_event ev);
121 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
122 enum obd_notify_event ev, void *data);
124 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
125 struct obd_connect_data *data)
127 struct lov_obd *lov = &obd->u.lov;
128 struct obd_uuid *tgt_uuid;
129 struct obd_device *tgt_obd;
130 static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
131 struct obd_import *imp;
133 struct proc_dir_entry *lov_proc_dir;
138 if (!lov->lov_tgts[index])
141 tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
142 tgt_obd = lov->lov_tgts[index]->ltd_obd;
144 if (!tgt_obd->obd_set_up) {
145 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
149 /* override the sp_me from lov */
150 tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
152 if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
153 data->ocd_index = index;
156 * Divine LOV knows that OBDs under it are OSCs.
158 imp = tgt_obd->u.cli.cl_import;
161 tgt_obd->obd_no_recov = 0;
162 /* FIXME this is probably supposed to be
163 ptlrpc_set_import_active. Horrible naming. */
164 ptlrpc_activate_import(imp);
167 rc = obd_register_observer(tgt_obd, obd);
169 CERROR("Target %s register_observer error %d\n",
170 obd_uuid2str(tgt_uuid), rc);
175 if (imp->imp_invalid) {
176 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
177 "disabled\n", obd_uuid2str(tgt_uuid));
181 rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
182 &lov_osc_uuid, data, NULL);
183 if (rc || !lov->lov_tgts[index]->ltd_exp) {
184 CERROR("Target %s connect error %d\n",
185 obd_uuid2str(tgt_uuid), rc);
189 lov->lov_tgts[index]->ltd_reap = 0;
191 CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
192 obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
195 lov_proc_dir = obd->obd_proc_private;
197 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
198 struct proc_dir_entry *osc_symlink;
200 LASSERT(osc_obd != NULL);
201 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
202 LASSERT(osc_obd->obd_type->typ_name != NULL);
204 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name,
207 osc_obd->obd_type->typ_name,
209 if (osc_symlink == NULL) {
210 CERROR("could not register LOV target "
211 "/proc/fs/lustre/%s/%s/target_obds/%s.",
212 obd->obd_type->typ_name, obd->obd_name,
214 lprocfs_remove(&lov_proc_dir);
215 obd->obd_proc_private = NULL;
223 static int lov_connect(const struct lu_env *env,
224 struct obd_export **exp, struct obd_device *obd,
225 struct obd_uuid *cluuid, struct obd_connect_data *data,
228 struct lov_obd *lov = &obd->u.lov;
229 struct lov_tgt_desc *tgt;
230 struct lustre_handle conn;
234 CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
236 rc = class_connect(&conn, obd, cluuid);
240 *exp = class_conn2export(&conn);
242 /* Why should there ever be more than 1 connect? */
244 LASSERT(lov->lov_connects == 1);
246 memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
248 lov->lov_ocd = *data;
251 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
252 tgt = lov->lov_tgts[i];
253 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
255 /* Flags will be lowest common denominator */
256 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
258 CERROR("%s: lov connect tgt %d failed: %d\n",
259 obd->obd_name, i, rc);
262 /* connect to administrative disabled ost */
263 if (!lov->lov_tgts[i]->ltd_exp)
266 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
267 OBD_NOTIFY_CONNECT, (void *)&i);
269 CERROR("%s error sending notify %d\n",
278 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
280 struct proc_dir_entry *lov_proc_dir;
281 struct lov_obd *lov = &obd->u.lov;
282 struct obd_device *osc_obd;
286 osc_obd = class_exp2obd(tgt->ltd_exp);
287 CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
288 obd->obd_name, osc_obd->obd_name);
290 if (tgt->ltd_active) {
292 lov->desc.ld_active_tgt_count--;
293 tgt->ltd_exp->exp_obd->obd_inactive = 1;
296 lov_proc_dir = obd->obd_proc_private;
298 lprocfs_remove_proc_entry(osc_obd->obd_name, lov_proc_dir);
301 /* Pass it on to our clients.
302 * XXX This should be an argument to disconnect,
303 * XXX not a back-door flag on the OBD. Ah well.
305 osc_obd->obd_force = obd->obd_force;
306 osc_obd->obd_fail = obd->obd_fail;
307 osc_obd->obd_no_recov = obd->obd_no_recov;
310 obd_register_observer(osc_obd, NULL);
312 rc = obd_disconnect(tgt->ltd_exp);
314 CERROR("Target %s disconnect error %d\n",
315 tgt->ltd_uuid.uuid, rc);
323 static int lov_disconnect(struct obd_export *exp)
325 struct obd_device *obd = class_exp2obd(exp);
326 struct lov_obd *lov = &obd->u.lov;
333 /* Only disconnect the underlying layers on the final disconnect. */
335 if (lov->lov_connects != 0) {
336 /* why should there be more than 1 connect? */
337 CERROR("disconnect #%d\n", lov->lov_connects);
341 /* Let's hold another reference so lov_del_obd doesn't spin through
345 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
346 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
347 /* Disconnection is the last we know about an obd */
348 lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
354 rc = class_disconnect(exp); /* bz 9811 */
360 * -EINVAL : UUID can't be found in the LOV's target list
361 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
362 * -EBADF : The UUID is found, but the OBD is the wrong type (!)
363 * any >= 0 : is log target index
365 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
366 enum obd_notify_event ev)
368 struct lov_obd *lov = &obd->u.lov;
369 struct lov_tgt_desc *tgt;
370 int index, activate, active;
373 CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
374 lov, uuid->uuid, ev);
377 for (index = 0; index < lov->desc.ld_tgt_count; index++) {
378 tgt = lov->lov_tgts[index];
382 * LU-642, initially inactive OSC could miss the obd_connect,
383 * we make up for it here.
385 if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
386 obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
387 struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
389 obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
390 &lov_osc_uuid, &lov->lov_ocd, NULL);
395 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
396 index, obd_uuid2str(&tgt->ltd_uuid),
397 tgt->ltd_exp->exp_handle.h_cookie);
398 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
402 if (index == lov->desc.ld_tgt_count)
403 GOTO(out, index = -EINVAL);
405 if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
406 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
408 if (lov->lov_tgts[index]->ltd_activate == activate) {
409 CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
410 uuid->uuid, activate ? "" : "de");
412 lov->lov_tgts[index]->ltd_activate = activate;
413 CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
414 activate ? "" : "de", obd_uuid2str(uuid));
417 } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
418 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
420 if (lov->lov_tgts[index]->ltd_active == active) {
421 CDEBUG(D_INFO, "OSC %s already %sactive!\n",
422 uuid->uuid, active ? "" : "in");
425 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
426 obd_uuid2str(uuid), active ? "" : "in");
429 lov->lov_tgts[index]->ltd_active = active;
431 lov->desc.ld_active_tgt_count++;
432 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
434 lov->desc.ld_active_tgt_count--;
435 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
438 CERROR("Unknown event(%d) for uuid %s", ev, uuid->uuid);
446 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
447 enum obd_notify_event ev, void *data)
450 struct lov_obd *lov = &obd->u.lov;
453 down_read(&lov->lov_notify_lock);
454 if (!lov->lov_connects) {
455 up_read(&lov->lov_notify_lock);
459 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
460 ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
461 struct obd_uuid *uuid;
465 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
466 up_read(&lov->lov_notify_lock);
467 CERROR("unexpected notification of %s %s!\n",
468 watched->obd_type->typ_name,
472 uuid = &watched->u.cli.cl_target_uuid;
474 /* Set OSC as active before notifying the observer, so the
475 * observer can use the OSC normally.
477 rc = lov_set_osc_active(obd, uuid, ev);
479 up_read(&lov->lov_notify_lock);
480 CERROR("event(%d) of %s failed: %d\n", ev,
481 obd_uuid2str(uuid), rc);
484 /* active event should be pass lov target index as data */
488 /* Pass the notification up the chain. */
490 rc = obd_notify_observer(obd, watched, ev, data);
492 /* NULL watched means all osc's in the lov (only for syncs) */
493 /* sync event should be send lov idx as data */
494 struct lov_obd *lov = &obd->u.lov;
498 is_sync = (ev == OBD_NOTIFY_SYNC) ||
499 (ev == OBD_NOTIFY_SYNC_NONBLOCK);
502 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
503 if (!lov->lov_tgts[i])
506 /* don't send sync event if target not
507 * connected/activated */
508 if (is_sync && !lov->lov_tgts[i]->ltd_active)
511 rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
514 CERROR("%s: notify %s of %s failed %d\n",
516 obd->obd_observer->obd_name,
517 lov->lov_tgts[i]->ltd_obd->obd_name,
524 up_read(&lov->lov_notify_lock);
528 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
529 __u32 index, int gen, int active)
531 struct lov_obd *lov = &obd->u.lov;
532 struct lov_tgt_desc *tgt;
533 struct obd_device *tgt_obd;
537 CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
538 uuidp->uuid, index, gen, active);
541 CERROR("request to add OBD %s with invalid generation: %d\n",
546 tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
551 mutex_lock(&lov->lov_lock);
553 if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
554 tgt = lov->lov_tgts[index];
555 CERROR("UUID %s already assigned at LOV target index %d\n",
556 obd_uuid2str(&tgt->ltd_uuid), index);
557 mutex_unlock(&lov->lov_lock);
561 if (index >= lov->lov_tgt_size) {
562 /* We need to reallocate the lov target array. */
563 struct lov_tgt_desc **newtgts, **old = NULL;
564 __u32 newsize, oldsize = 0;
566 newsize = max(lov->lov_tgt_size, (__u32)2);
567 while (newsize < index + 1)
568 newsize = newsize << 1;
569 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
570 if (newtgts == NULL) {
571 mutex_unlock(&lov->lov_lock);
575 if (lov->lov_tgt_size) {
576 memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
579 oldsize = lov->lov_tgt_size;
582 lov->lov_tgts = newtgts;
583 lov->lov_tgt_size = newsize;
586 OBD_FREE(old, sizeof(*old) * oldsize);
588 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
589 lov->lov_tgts, lov->lov_tgt_size);
594 mutex_unlock(&lov->lov_lock);
598 rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
600 mutex_unlock(&lov->lov_lock);
605 tgt->ltd_uuid = *uuidp;
606 tgt->ltd_obd = tgt_obd;
607 /* XXX - add a sanity check on the generation number. */
609 tgt->ltd_index = index;
610 tgt->ltd_activate = active;
611 lov->lov_tgts[index] = tgt;
612 if (index >= lov->desc.ld_tgt_count)
613 lov->desc.ld_tgt_count = index + 1;
615 mutex_unlock(&lov->lov_lock);
617 CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
618 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
620 rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
622 if (lov->lov_connects == 0) {
623 /* lov_connect hasn't been called yet. We'll do the
624 lov_connect_obd on this target when that fn first runs,
625 because we don't know the connect flags yet. */
631 rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
635 /* connect to administrative disabled ost */
639 if (lov->lov_cache != NULL) {
640 rc = obd_set_info_async(NULL, tgt->ltd_exp,
641 sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
642 sizeof(struct cl_client_cache), lov->lov_cache,
648 rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
649 active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
654 CERROR("add failed (%d), deleting %s\n", rc,
655 obd_uuid2str(&tgt->ltd_uuid));
656 lov_del_target(obd, index, 0, 0);
662 /* Schedule a target for deletion */
663 int lov_del_target(struct obd_device *obd, __u32 index,
664 struct obd_uuid *uuidp, int gen)
666 struct lov_obd *lov = &obd->u.lov;
667 int count = lov->desc.ld_tgt_count;
671 if (index >= count) {
672 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
677 /* to make sure there's no ongoing lov_notify() now */
678 down_write(&lov->lov_notify_lock);
681 if (!lov->lov_tgts[index]) {
682 CERROR("LOV target at index %d is not setup.\n", index);
683 GOTO(out, rc = -EINVAL);
686 if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
687 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
688 lov_uuid2str(lov, index), index,
689 obd_uuid2str(uuidp));
690 GOTO(out, rc = -EINVAL);
693 CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
694 lov_uuid2str(lov, index), index,
695 lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
696 lov->lov_tgts[index]->ltd_active);
698 lov->lov_tgts[index]->ltd_reap = 1;
699 lov->lov_death_row++;
700 /* we really delete it from obd_putref */
703 up_write(&lov->lov_notify_lock);
708 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
710 struct obd_device *osc_obd;
713 LASSERT(tgt->ltd_reap);
715 osc_obd = class_exp2obd(tgt->ltd_exp);
717 CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
719 osc_obd ? osc_obd->obd_name : "<no obd>");
722 lov_disconnect_obd(obd, tgt);
726 /* Manual cleanup - no cleanup logs to clean up the osc's. We must
727 do it ourselves. And we can't do it from lov_cleanup,
728 because we just lost our only reference to it. */
730 class_manual_cleanup(osc_obd);
733 void lov_fix_desc_stripe_size(__u64 *val)
735 if (*val < LOV_MIN_STRIPE_SIZE) {
737 LCONSOLE_INFO("Increasing default stripe size to "
739 LOV_DESC_STRIPE_SIZE_DEFAULT);
740 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
741 } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
742 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
743 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
745 *val, LOV_MIN_STRIPE_SIZE);
749 void lov_fix_desc_stripe_count(__u32 *val)
755 void lov_fix_desc_pattern(__u32 *val)
757 /* from lov_setstripe */
758 if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
759 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
764 void lov_fix_desc_qos_maxage(__u32 *val)
767 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
770 void lov_fix_desc(struct lov_desc *desc)
772 lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
773 lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
774 lov_fix_desc_pattern(&desc->ld_pattern);
775 lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
778 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
780 struct lov_desc *desc;
781 struct lov_obd *lov = &obd->u.lov;
785 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
786 CERROR("LOV setup requires a descriptor\n");
790 desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
792 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
793 CERROR("descriptor size wrong: %d > %d\n",
794 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
798 if (desc->ld_magic != LOV_DESC_MAGIC) {
799 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
800 CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
801 obd->obd_name, desc);
802 lustre_swab_lov_desc(desc);
804 CERROR("%s: Bad lov desc magic: %#x\n",
805 obd->obd_name, desc->ld_magic);
812 desc->ld_active_tgt_count = 0;
814 lov->lov_tgt_size = 0;
816 mutex_init(&lov->lov_lock);
817 cfs_atomic_set(&lov->lov_refcount, 0);
818 lov->lov_sp_me = LUSTRE_SP_CLI;
820 init_rwsem(&lov->lov_notify_lock);
822 lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
824 HASH_POOLS_BKT_BITS, 0,
827 &pool_hash_operations,
829 CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
830 lov->lov_pool_count = 0;
831 rc = lov_ost_pool_init(&lov->lov_packed, 0);
836 obd->obd_vars = lprocfs_lov_obd_vars;
837 lprocfs_seq_obd_setup(obd);
838 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", 0444,
839 &lov_proc_target_fops, obd);
841 CWARN("Error adding the target_obd file\n");
843 lov->lov_pool_proc_entry = lprocfs_seq_register("pools",
853 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
856 struct lov_obd *lov = &obd->u.lov;
861 case OBD_CLEANUP_EARLY: {
863 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
864 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
866 obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
878 static int lov_cleanup(struct obd_device *obd)
880 struct lov_obd *lov = &obd->u.lov;
881 cfs_list_t *pos, *tmp;
882 struct pool_desc *pool;
885 cfs_list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
886 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
887 /* free pool structs */
888 CDEBUG(D_INFO, "delete pool %p\n", pool);
889 /* In the function below, .hs_keycmp resolves to
890 * pool_hashkey_keycmp() */
891 /* coverity[overrun-buffer-val] */
892 lov_pool_del(obd, pool->pool_name);
894 cfs_hash_putref(lov->lov_pools_hash_body);
895 lov_ost_pool_free(&lov->lov_packed);
897 lprocfs_obd_cleanup(obd);
901 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
902 if (!lov->lov_tgts[i])
905 /* Inactive targets may never have connected */
906 if (lov->lov_tgts[i]->ltd_active ||
907 cfs_atomic_read(&lov->lov_refcount))
908 /* We should never get here - these
909 should have been removed in the
911 CERROR("lov tgt %d not cleaned!"
912 " deathrow=%d, lovrc=%d\n",
913 i, lov->lov_death_row,
914 cfs_atomic_read(&lov->lov_refcount));
915 lov_del_target(obd, i, 0, 0);
918 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
920 lov->lov_tgt_size = 0;
925 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
926 __u32 *indexp, int *genp)
928 struct obd_uuid obd_uuid;
933 switch(cmd = lcfg->lcfg_command) {
934 case LCFG_LOV_ADD_OBD:
935 case LCFG_LOV_ADD_INA:
936 case LCFG_LOV_DEL_OBD: {
939 /* lov_modify_tgts add 0:lov_mdsA 1:ost1_UUID 2:0 3:1 */
940 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
941 GOTO(out, rc = -EINVAL);
943 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
945 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
946 GOTO(out, rc = -EINVAL);
947 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
948 GOTO(out, rc = -EINVAL);
951 if (cmd == LCFG_LOV_ADD_OBD)
952 rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
953 else if (cmd == LCFG_LOV_ADD_INA)
954 rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
956 rc = lov_del_target(obd, index, &obd_uuid, gen);
960 struct lov_desc *desc = &(obd->u.lov.desc);
963 GOTO(out, rc = -EINVAL);
965 rc = class_process_proc_seq_param(PARAM_LOV, obd->obd_vars,
978 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
979 GOTO(out, rc = -EINVAL);
987 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
988 struct lov_stripe_md **ea, struct obd_trans_info *oti)
990 struct lov_stripe_md *obj_mdp, *lsm;
991 struct lov_obd *lov = &exp->exp_obd->u.lov;
996 LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
997 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
999 OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1000 if (obj_mdp == NULL)
1003 ost_idx = src_oa->o_nlink;
1006 GOTO(out, rc = -EINVAL);
1007 if (ost_idx >= lov->desc.ld_tgt_count ||
1008 !lov->lov_tgts[ost_idx])
1009 GOTO(out, rc = -EINVAL);
1011 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1012 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1013 if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) !=
1014 ostid_id(&src_oa->o_oi))
1015 GOTO(out, rc = -EINVAL);
1019 if (i == lsm->lsm_stripe_count)
1020 GOTO(out, rc = -EINVAL);
1022 rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp,
1023 src_oa, &obj_mdp, oti);
1025 OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1029 /* the LOV expects oa->o_id to be set to the LOV object id */
1030 static int lov_create(const struct lu_env *env, struct obd_export *exp,
1031 struct obdo *src_oa, struct lov_stripe_md **ea,
1032 struct obd_trans_info *oti)
1034 struct lov_obd *lov;
1038 LASSERT(ea != NULL);
1042 if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1043 src_oa->o_flags == OBD_FL_DELORPHAN) {
1044 /* should be used with LOV anymore */
1048 lov = &exp->exp_obd->u.lov;
1049 if (!lov->desc.ld_active_tgt_count)
1052 obd_getref(exp->exp_obd);
1053 /* Recreate a specific object id at the given OST index */
1054 if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1055 (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1056 rc = lov_recreate(exp, src_oa, ea, oti);
1059 obd_putref(exp->exp_obd);
1063 #define ASSERT_LSM_MAGIC(lsmp) \
1065 LASSERT((lsmp) != NULL); \
1066 LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 || \
1067 (lsmp)->lsm_magic == LOV_MAGIC_V3), \
1068 "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic); \
1071 static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
1072 struct obdo *oa, struct lov_stripe_md *lsm,
1073 struct obd_trans_info *oti, struct obd_export *md_exp,
1076 struct lov_request_set *set;
1077 struct obd_info oinfo;
1078 struct lov_request *req;
1080 struct lov_obd *lov;
1081 int rc = 0, err = 0;
1084 ASSERT_LSM_MAGIC(lsm);
1086 if (!exp || !exp->exp_obd)
1089 if (oa->o_valid & OBD_MD_FLCOOKIE) {
1091 LASSERT(oti->oti_logcookies);
1094 lov = &exp->exp_obd->u.lov;
1095 obd_getref(exp->exp_obd);
1096 rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1100 cfs_list_for_each (pos, &set->set_list) {
1101 req = cfs_list_entry(pos, struct lov_request, rq_link);
1103 if (oa->o_valid & OBD_MD_FLCOOKIE)
1104 oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1106 err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1107 req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1108 err = lov_update_common_set(set, req, err);
1110 CERROR("%s: destroying objid "DOSTID" subobj "
1111 DOSTID" on OST idx %d: rc = %d\n",
1112 exp->exp_obd->obd_name, POSTID(&oa->o_oi),
1113 POSTID(&req->rq_oi.oi_oa->o_oi),
1121 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1122 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1124 err = lov_fini_destroy_set(set);
1126 obd_putref(exp->exp_obd);
1127 RETURN(rc ? rc : err);
1130 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1133 struct lov_request_set *lovset = (struct lov_request_set *)data;
1137 /* don't do attribute merge if this aysnc op failed */
1139 cfs_atomic_set(&lovset->set_completes, 0);
1140 err = lov_fini_getattr_set(lovset);
1141 RETURN(rc ? rc : err);
1144 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1145 struct ptlrpc_request_set *rqset)
1147 struct lov_request_set *lovset;
1148 struct lov_obd *lov;
1150 struct lov_request *req;
1155 ASSERT_LSM_MAGIC(oinfo->oi_md);
1157 if (!exp || !exp->exp_obd)
1160 lov = &exp->exp_obd->u.lov;
1162 rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1166 CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1167 POSTID(&oinfo->oi_md->lsm_oi), oinfo->oi_md->lsm_stripe_count,
1168 oinfo->oi_md->lsm_stripe_size);
1170 cfs_list_for_each(pos, &lovset->set_list) {
1171 req = cfs_list_entry(pos, struct lov_request, rq_link);
1173 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1174 "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1175 POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1176 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1177 &req->rq_oi, rqset);
1179 CERROR("%s: getattr objid "DOSTID" subobj"
1180 DOSTID" on OST idx %d: rc = %d\n",
1181 exp->exp_obd->obd_name,
1182 POSTID(&oinfo->oi_oa->o_oi),
1183 POSTID(&req->rq_oi.oi_oa->o_oi),
1189 if (!cfs_list_empty(&rqset->set_requests)) {
1191 LASSERT (rqset->set_interpret == NULL);
1192 rqset->set_interpret = lov_getattr_interpret;
1193 rqset->set_arg = (void *)lovset;
1198 cfs_atomic_set(&lovset->set_completes, 0);
1199 err = lov_fini_getattr_set(lovset);
1200 RETURN(rc ? rc : err);
1203 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1206 struct lov_request_set *lovset = (struct lov_request_set *)data;
1211 cfs_atomic_set(&lovset->set_completes, 0);
1212 err = lov_fini_setattr_set(lovset);
1213 RETURN(rc ? rc : err);
1216 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1217 needed. Otherwise, a client is waiting for responses. */
1218 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1219 struct obd_trans_info *oti,
1220 struct ptlrpc_request_set *rqset)
1222 struct lov_request_set *set;
1223 struct lov_request *req;
1225 struct lov_obd *lov;
1230 ASSERT_LSM_MAGIC(oinfo->oi_md);
1231 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1233 LASSERT(oti->oti_logcookies);
1236 if (!exp || !exp->exp_obd)
1239 lov = &exp->exp_obd->u.lov;
1240 rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1244 CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1245 POSTID(&oinfo->oi_md->lsm_oi),
1246 oinfo->oi_md->lsm_stripe_count,
1247 oinfo->oi_md->lsm_stripe_size);
1249 cfs_list_for_each(pos, &set->set_list) {
1250 req = cfs_list_entry(pos, struct lov_request, rq_link);
1252 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1253 oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1255 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1256 "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1257 POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1259 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1260 &req->rq_oi, oti, rqset);
1262 CERROR("error: setattr objid "DOSTID" subobj"
1263 DOSTID" on OST idx %d: rc = %d\n",
1264 POSTID(&set->set_oi->oi_oa->o_oi),
1265 POSTID(&req->rq_oi.oi_oa->o_oi),
1271 /* If we are not waiting for responses on async requests, return. */
1272 if (rc || !rqset || cfs_list_empty(&rqset->set_requests)) {
1275 cfs_atomic_set(&set->set_completes, 0);
1276 err = lov_fini_setattr_set(set);
1277 RETURN(rc ? rc : err);
1280 LASSERT(rqset->set_interpret == NULL);
1281 rqset->set_interpret = lov_setattr_interpret;
1282 rqset->set_arg = (void *)set;
1287 static int lov_change_cbdata(struct obd_export *exp,
1288 struct lov_stripe_md *lsm, ldlm_iterator_t it,
1291 struct lov_obd *lov;
1295 ASSERT_LSM_MAGIC(lsm);
1297 if (!exp || !exp->exp_obd)
1300 lov = &exp->exp_obd->u.lov;
1301 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1302 struct lov_stripe_md submd;
1303 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1305 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1306 CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1310 submd.lsm_oi = loi->loi_oi;
1311 submd.lsm_stripe_count = 0;
1312 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1318 /* find any ldlm lock of the inode in lov
1322 static int lov_find_cbdata(struct obd_export *exp,
1323 struct lov_stripe_md *lsm, ldlm_iterator_t it,
1326 struct lov_obd *lov;
1330 ASSERT_LSM_MAGIC(lsm);
1332 if (!exp || !exp->exp_obd)
1335 lov = &exp->exp_obd->u.lov;
1336 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1337 struct lov_stripe_md submd;
1338 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1340 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1341 CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1344 submd.lsm_oi = loi->loi_oi;
1345 submd.lsm_stripe_count = 0;
1346 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1354 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1356 struct lov_request_set *lovset = (struct lov_request_set *)data;
1361 cfs_atomic_set(&lovset->set_completes, 0);
1363 err = lov_fini_statfs_set(lovset);
1364 RETURN(rc ? rc : err);
1367 static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
1368 __u64 max_age, struct ptlrpc_request_set *rqset)
1370 struct obd_device *obd = class_exp2obd(exp);
1371 struct lov_request_set *set;
1372 struct lov_request *req;
1374 struct lov_obd *lov;
1378 LASSERT(oinfo != NULL);
1379 LASSERT(oinfo->oi_osfs != NULL);
1382 rc = lov_prep_statfs_set(obd, oinfo, &set);
1386 cfs_list_for_each (pos, &set->set_list) {
1387 req = cfs_list_entry(pos, struct lov_request, rq_link);
1388 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1389 &req->rq_oi, max_age, rqset);
1394 if (rc || cfs_list_empty(&rqset->set_requests)) {
1397 cfs_atomic_set(&set->set_completes, 0);
1398 err = lov_fini_statfs_set(set);
1399 RETURN(rc ? rc : err);
1402 LASSERT(rqset->set_interpret == NULL);
1403 rqset->set_interpret = lov_statfs_interpret;
1404 rqset->set_arg = (void *)set;
1408 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
1409 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1411 struct ptlrpc_request_set *set = NULL;
1412 struct obd_info oinfo = { { { 0 } } };
1417 /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1418 * statfs requests */
1419 set = ptlrpc_prep_set();
1423 oinfo.oi_osfs = osfs;
1424 oinfo.oi_flags = flags;
1425 rc = lov_statfs_async(exp, &oinfo, max_age, set);
1427 rc = ptlrpc_set_wait(set);
1428 ptlrpc_set_destroy(set);
1433 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1434 void *karg, void *uarg)
1436 struct obd_device *obddev = class_exp2obd(exp);
1437 struct lov_obd *lov = &obddev->u.lov;
1438 int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1439 struct obd_uuid *uuidp;
1443 case IOC_OBD_STATFS: {
1444 struct obd_ioctl_data *data = karg;
1445 struct obd_device *osc_obd;
1446 struct obd_statfs stat_buf = {0};
1450 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1451 if ((index >= count))
1454 if (!lov->lov_tgts[index])
1455 /* Try again with the next index */
1457 if (!lov->lov_tgts[index]->ltd_active)
1460 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1465 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1466 min((int)data->ioc_plen2,
1467 (int)sizeof(struct obd_uuid))))
1470 flags = uarg ? *(__u32*)uarg : 0;
1471 /* got statfs data */
1472 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1473 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1477 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1478 min((int) data->ioc_plen1,
1479 (int) sizeof(stat_buf))))
1483 case OBD_IOC_LOV_GET_CONFIG: {
1484 struct obd_ioctl_data *data;
1485 struct lov_desc *desc;
1490 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1493 data = (struct obd_ioctl_data *)buf;
1495 if (sizeof(*desc) > data->ioc_inllen1) {
1496 obd_ioctl_freedata(buf, len);
1500 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1501 obd_ioctl_freedata(buf, len);
1505 if (sizeof(__u32) * count > data->ioc_inllen3) {
1506 obd_ioctl_freedata(buf, len);
1510 desc = (struct lov_desc *)data->ioc_inlbuf1;
1511 memcpy(desc, &(lov->desc), sizeof(*desc));
1513 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1514 genp = (__u32 *)data->ioc_inlbuf3;
1515 /* the uuid will be empty for deleted OSTs */
1516 for (i = 0; i < count; i++, uuidp++, genp++) {
1517 if (!lov->lov_tgts[i])
1519 *uuidp = lov->lov_tgts[i]->ltd_uuid;
1520 *genp = lov->lov_tgts[i]->ltd_gen;
1523 if (copy_to_user((void *)uarg, buf, len))
1525 obd_ioctl_freedata(buf, len);
1528 case LL_IOC_LOV_GETSTRIPE:
1529 rc = lov_getstripe(exp, karg, uarg);
1531 case OBD_IOC_QUOTACTL: {
1532 struct if_quotactl *qctl = karg;
1533 struct lov_tgt_desc *tgt = NULL;
1534 struct obd_quotactl *oqctl;
1536 if (qctl->qc_valid == QC_OSTIDX) {
1537 if (count <= qctl->qc_idx)
1540 tgt = lov->lov_tgts[qctl->qc_idx];
1541 if (!tgt || !tgt->ltd_exp)
1543 } else if (qctl->qc_valid == QC_UUID) {
1544 for (i = 0; i < count; i++) {
1545 tgt = lov->lov_tgts[i];
1547 !obd_uuid_equals(&tgt->ltd_uuid,
1551 if (tgt->ltd_exp == NULL)
1563 LASSERT(tgt && tgt->ltd_exp);
1564 OBD_ALLOC_PTR(oqctl);
1568 QCTL_COPY(oqctl, qctl);
1569 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1571 QCTL_COPY(qctl, oqctl);
1572 qctl->qc_valid = QC_OSTIDX;
1573 qctl->obd_uuid = tgt->ltd_uuid;
1575 OBD_FREE_PTR(oqctl);
1584 for (i = 0; i < count; i++) {
1586 struct obd_device *osc_obd;
1588 /* OST was disconnected */
1589 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1592 /* ll_umount_begin() sets force flag but for lov, not
1593 * osc. Let's pass it through */
1594 osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1595 osc_obd->obd_force = obddev->obd_force;
1596 err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1598 if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
1601 if (lov->lov_tgts[i]->ltd_active) {
1602 CDEBUG(err == -ENOTTY ?
1603 D_IOCTL : D_WARNING,
1604 "iocontrol OSC %s on OST "
1605 "idx %d cmd %x: err = %d\n",
1606 lov_uuid2str(lov, i),
1623 #define FIEMAP_BUFFER_SIZE 4096
1626 * Non-zero fe_logical indicates that this is a continuation FIEMAP
1627 * call. The local end offset and the device are sent in the first
1628 * fm_extent. This function calculates the stripe number from the index.
1629 * This function returns a stripe_no on which mapping is to be restarted.
1631 * This function returns fm_end_offset which is the in-OST offset at which
1632 * mapping should be restarted. If fm_end_offset=0 is returned then caller
1633 * will re-calculate proper offset in next stripe.
1634 * Note that the first extent is passed to lov_get_info via the value field.
1636 * \param fiemap fiemap request header
1637 * \param lsm striping information for the file
1638 * \param fm_start logical start of mapping
1639 * \param fm_end logical end of mapping
1640 * \param start_stripe starting stripe will be returned in this
1642 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
1643 struct lov_stripe_md *lsm, obd_size fm_start,
1644 obd_size fm_end, int *start_stripe)
1646 obd_size local_end = fiemap->fm_extents[0].fe_logical;
1647 obd_off lun_start, lun_end;
1648 obd_size fm_end_offset;
1649 int stripe_no = -1, i;
1651 if (fiemap->fm_extent_count == 0 ||
1652 fiemap->fm_extents[0].fe_logical == 0)
1655 /* Find out stripe_no from ost_index saved in the fe_device */
1656 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1657 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
1658 fiemap->fm_extents[0].fe_device) {
1663 if (stripe_no == -1)
1666 /* If we have finished mapping on previous device, shift logical
1667 * offset to start of next device */
1668 if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
1669 &lun_start, &lun_end)) != 0 &&
1670 local_end < lun_end) {
1671 fm_end_offset = local_end;
1672 *start_stripe = stripe_no;
1674 /* This is a special value to indicate that caller should
1675 * calculate offset in next stripe. */
1677 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
1680 return fm_end_offset;
1684 * We calculate on which OST the mapping will end. If the length of mapping
1685 * is greater than (stripe_size * stripe_count) then the last_stripe will
1686 * will be one just before start_stripe. Else we check if the mapping
1687 * intersects each OST and find last_stripe.
1688 * This function returns the last_stripe and also sets the stripe_count
1689 * over which the mapping is spread
1691 * \param lsm striping information for the file
1692 * \param fm_start logical start of mapping
1693 * \param fm_end logical end of mapping
1694 * \param start_stripe starting stripe of the mapping
1695 * \param stripe_count the number of stripes across which to map is returned
1697 * \retval last_stripe return the last stripe of the mapping
1699 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
1700 obd_size fm_end, int start_stripe,
1704 obd_off obd_start, obd_end;
1707 if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
1708 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
1710 *stripe_count = lsm->lsm_stripe_count;
1712 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
1713 i = (i + 1) % lsm->lsm_stripe_count, j++) {
1714 if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
1715 &obd_start, &obd_end)) == 0)
1719 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
1726 * Set fe_device and copy extents from local buffer into main return buffer.
1728 * \param fiemap fiemap request header
1729 * \param lcl_fm_ext array of local fiemap extents to be copied
1730 * \param ost_index OST index to be written into the fm_device field for each
1732 * \param ext_count number of extents to be copied
1733 * \param current_extent where to start copying in main extent array
1735 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
1736 struct ll_fiemap_extent *lcl_fm_ext,
1737 int ost_index, unsigned int ext_count,
1743 for (ext = 0; ext < ext_count; ext++) {
1744 lcl_fm_ext[ext].fe_device = ost_index;
1745 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
1748 /* Copy fm_extent's from fm_local to return buffer */
1749 to = (char *)fiemap + fiemap_count_to_size(current_extent);
1750 memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
1754 * Break down the FIEMAP request and send appropriate calls to individual OSTs.
1755 * This also handles the restarting of FIEMAP calls in case mapping overflows
1756 * the available number of extents in single call.
1758 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
1759 __u32 *vallen, void *val, struct lov_stripe_md *lsm)
1761 struct ll_fiemap_info_key *fm_key = key;
1762 struct ll_user_fiemap *fiemap = val;
1763 struct ll_user_fiemap *fm_local = NULL;
1764 struct ll_fiemap_extent *lcl_fm_ext;
1766 unsigned int get_num_extents = 0;
1767 int ost_index = 0, actual_start_stripe, start_stripe;
1768 obd_size fm_start, fm_end, fm_length, fm_end_offset;
1770 int current_extent = 0, rc = 0, i;
1771 int ost_eof = 0; /* EOF for object */
1772 int ost_done = 0; /* done with required mapping for this OST? */
1774 int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
1775 unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
1777 if (!lsm_has_objects(lsm)) {
1778 if (lsm && lsm_is_released(lsm) && (fm_key->fiemap.fm_start <
1779 fm_key->oa.o_size)) {
1780 /* released file, return a minimal FIEMAP if
1781 * request fits in file-size.
1783 fiemap->fm_mapped_extents = 1;
1784 fiemap->fm_extents[0].fe_logical =
1785 fm_key->fiemap.fm_start;
1786 if (fm_key->fiemap.fm_start + fm_key->fiemap.fm_length <
1788 fiemap->fm_extents[0].fe_length =
1789 fm_key->fiemap.fm_length;
1791 fiemap->fm_extents[0].fe_length =
1793 fm_key->fiemap.fm_start;
1794 fiemap->fm_extents[0].fe_flags |=
1795 (FIEMAP_EXTENT_UNKNOWN |
1796 FIEMAP_EXTENT_LAST);
1801 if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
1802 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
1804 OBD_ALLOC_LARGE(fm_local, buffer_size);
1805 if (fm_local == NULL)
1806 GOTO(out, rc = -ENOMEM);
1807 lcl_fm_ext = &fm_local->fm_extents[0];
1809 count_local = fiemap_size_to_count(buffer_size);
1811 memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
1812 fm_start = fiemap->fm_start;
1813 fm_length = fiemap->fm_length;
1814 /* Calculate start stripe, last stripe and length of mapping */
1815 actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
1816 fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
1817 fm_start + fm_length - 1);
1818 /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
1819 if (fm_end > fm_key->oa.o_size)
1820 fm_end = fm_key->oa.o_size;
1822 last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
1823 actual_start_stripe, &stripe_count);
1825 fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start,
1826 fm_end, &start_stripe);
1827 if (fm_end_offset == -EINVAL)
1828 GOTO(out, rc = -EINVAL);
1830 if (fiemap->fm_extent_count == 0) {
1831 get_num_extents = 1;
1835 /* Check each stripe */
1836 for (cur_stripe = start_stripe, i = 0; i < stripe_count;
1837 i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
1838 obd_size req_fm_len; /* Stores length of required mapping */
1839 obd_size len_mapped_single_call;
1840 obd_off lun_start, lun_end, obd_object_end;
1841 unsigned int ext_count;
1843 cur_stripe_wrap = cur_stripe;
1845 /* Find out range of mapping on this stripe */
1846 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
1847 &lun_start, &obd_object_end)) == 0)
1850 /* If this is a continuation FIEMAP call and we are on
1851 * starting stripe then lun_start needs to be set to
1853 if (fm_end_offset != 0 && cur_stripe == start_stripe)
1854 lun_start = fm_end_offset;
1856 if (fm_length != ~0ULL) {
1857 /* Handle fm_start + fm_length overflow */
1858 if (fm_start + fm_length < fm_start)
1859 fm_length = ~0ULL - fm_start;
1860 lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
1866 if (lun_start == lun_end)
1869 req_fm_len = obd_object_end - lun_start;
1870 fm_local->fm_length = 0;
1871 len_mapped_single_call = 0;
1873 /* If the output buffer is very large and the objects have many
1874 * extents we may need to loop on a single OST repeatedly */
1878 if (get_num_extents == 0) {
1879 /* Don't get too many extents. */
1880 if (current_extent + count_local >
1881 fiemap->fm_extent_count)
1882 count_local = fiemap->fm_extent_count -
1886 lun_start += len_mapped_single_call;
1887 fm_local->fm_length = req_fm_len - len_mapped_single_call;
1888 req_fm_len = fm_local->fm_length;
1889 fm_local->fm_extent_count = count_local;
1890 fm_local->fm_mapped_extents = 0;
1891 fm_local->fm_flags = fiemap->fm_flags;
1893 fm_key->oa.o_oi = lsm->lsm_oinfo[cur_stripe]->loi_oi;
1894 ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
1896 if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
1897 GOTO(out, rc = -EINVAL);
1899 /* If OST is inactive, return extent with UNKNOWN flag */
1900 if (!lov->lov_tgts[ost_index]->ltd_active) {
1901 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
1902 fm_local->fm_mapped_extents = 1;
1904 lcl_fm_ext[0].fe_logical = lun_start;
1905 lcl_fm_ext[0].fe_length = obd_object_end -
1907 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
1912 fm_local->fm_start = lun_start;
1913 fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
1914 memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
1915 *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
1916 rc = obd_get_info(NULL,
1917 lov->lov_tgts[ost_index]->ltd_exp,
1918 keylen, key, vallen, fm_local, lsm);
1923 ext_count = fm_local->fm_mapped_extents;
1924 if (ext_count == 0) {
1926 /* If last stripe has hole at the end,
1927 * then we need to return */
1928 if (cur_stripe_wrap == last_stripe) {
1929 fiemap->fm_mapped_extents = 0;
1935 /* If we just need num of extents then go to next device */
1936 if (get_num_extents) {
1937 current_extent += ext_count;
1941 len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
1942 lun_start + lcl_fm_ext[ext_count - 1].fe_length;
1944 /* Have we finished mapping on this device? */
1945 if (req_fm_len <= len_mapped_single_call)
1948 /* Clear the EXTENT_LAST flag which can be present on
1950 if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
1951 lcl_fm_ext[ext_count - 1].fe_flags &=
1952 ~FIEMAP_EXTENT_LAST;
1954 curr_loc = lov_stripe_size(lsm,
1955 lcl_fm_ext[ext_count - 1].fe_logical+
1956 lcl_fm_ext[ext_count - 1].fe_length,
1958 if (curr_loc >= fm_key->oa.o_size)
1961 fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
1962 ost_index, ext_count,
1965 current_extent += ext_count;
1967 /* Ran out of available extents? */
1968 if (current_extent >= fiemap->fm_extent_count)
1970 } while (ost_done == 0 && ost_eof == 0);
1972 if (cur_stripe_wrap == last_stripe)
1977 /* Indicate that we are returning device offsets unless file just has
1979 if (lsm->lsm_stripe_count > 1)
1980 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
1982 if (get_num_extents)
1983 goto skip_last_device_calc;
1985 /* Check if we have reached the last stripe and whether mapping for that
1986 * stripe is done. */
1987 if (cur_stripe_wrap == last_stripe) {
1988 if (ost_done || ost_eof)
1989 fiemap->fm_extents[current_extent - 1].fe_flags |=
1993 skip_last_device_calc:
1994 fiemap->fm_mapped_extents = current_extent;
1998 OBD_FREE_LARGE(fm_local, buffer_size);
2002 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
2003 __u32 keylen, void *key, __u32 *vallen, void *val,
2004 struct lov_stripe_md *lsm)
2006 struct obd_device *obddev = class_exp2obd(exp);
2007 struct lov_obd *lov = &obddev->u.lov;
2011 if (!vallen || !val)
2016 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2019 struct ldlm_lock *lock;
2021 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2022 struct lov_oinfo *loi;
2023 __u32 *stripe = val;
2025 if (*vallen < sizeof(*stripe))
2026 GOTO(out, rc = -EFAULT);
2027 *vallen = sizeof(*stripe);
2029 /* XXX This is another one of those bits that will need to
2030 * change if we ever actually support nested LOVs. It uses
2031 * the lock's export to find out which stripe it is. */
2032 /* XXX - it's assumed all the locks for deleted OSTs have
2033 * been cancelled. Also, the export for deleted OSTs will
2034 * be NULL and won't match the lock's export. */
2035 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2036 loi = lsm->lsm_oinfo[i];
2037 if (!lov->lov_tgts[loi->loi_ost_idx])
2039 if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2040 data->lock->l_conn_export &&
2041 ostid_res_name_eq(&loi->loi_oi, res_id)) {
2046 LDLM_ERROR(data->lock, "lock on inode without such object");
2047 dump_lsm(D_ERROR, lsm);
2048 GOTO(out, rc = -ENXIO);
2049 } else if (KEY_IS(KEY_LAST_ID)) {
2050 struct obd_id_info *info = val;
2051 __u32 size = sizeof(obd_id);
2052 struct lov_tgt_desc *tgt;
2054 LASSERT(*vallen == sizeof(struct obd_id_info));
2055 tgt = lov->lov_tgts[info->idx];
2057 if (!tgt || !tgt->ltd_active)
2058 GOTO(out, rc = -ESRCH);
2060 rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
2061 &size, info->data, NULL);
2063 } else if (KEY_IS(KEY_LOVDESC)) {
2064 struct lov_desc *desc_ret = val;
2065 *desc_ret = lov->desc;
2068 } else if (KEY_IS(KEY_FIEMAP)) {
2069 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2071 } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2072 struct lov_tgt_desc *tgt;
2073 __u64 ost_idx = *((__u64*)val);
2075 LASSERT(*vallen == sizeof(__u64));
2076 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2077 tgt = lov->lov_tgts[ost_idx];
2079 if (!tgt || !tgt->ltd_exp)
2080 GOTO(out, rc = -ESRCH);
2082 *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp);
2084 } else if (KEY_IS(KEY_TGT_COUNT)) {
2085 *((int *)val) = lov->desc.ld_tgt_count;
2096 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
2097 obd_count keylen, void *key, obd_count vallen,
2098 void *val, struct ptlrpc_request_set *set)
2100 struct obd_device *obddev = class_exp2obd(exp);
2101 struct lov_obd *lov = &obddev->u.lov;
2104 struct lov_tgt_desc *tgt;
2105 unsigned incr, check_uuid,
2106 do_inactive, no_set;
2107 unsigned next_id = 0, mds_con = 0, capa = 0;
2110 incr = check_uuid = do_inactive = no_set = 0;
2113 set = ptlrpc_prep_set();
2119 count = lov->desc.ld_tgt_count;
2121 if (KEY_IS(KEY_NEXT_ID)) {
2122 count = vallen / sizeof(struct obd_id_info);
2123 vallen = sizeof(obd_id);
2124 incr = sizeof(struct obd_id_info);
2127 } else if (KEY_IS(KEY_CHECKSUM)) {
2129 } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2130 /* use defaults: do_inactive = incr = 0; */
2131 } else if (KEY_IS(KEY_MDS_CONN)) {
2133 } else if (KEY_IS(KEY_CAPA_KEY)) {
2135 } else if (KEY_IS(KEY_CACHE_SET)) {
2136 LASSERT(lov->lov_cache == NULL);
2137 lov->lov_cache = val;
2141 for (i = 0; i < count; i++, val = (char *)val + incr) {
2143 tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2145 tgt = lov->lov_tgts[i];
2147 /* OST was disconnected */
2148 if (!tgt || !tgt->ltd_exp)
2151 /* OST is inactive and we don't want inactive OSCs */
2152 if (!tgt->ltd_active && !do_inactive)
2156 struct mds_group_info *mgi;
2158 LASSERT(vallen == sizeof(*mgi));
2159 mgi = (struct mds_group_info *)val;
2161 /* Only want a specific OSC */
2162 if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2166 err = obd_set_info_async(env, tgt->ltd_exp,
2167 keylen, key, sizeof(int),
2169 } else if (next_id) {
2170 err = obd_set_info_async(env, tgt->ltd_exp,
2171 keylen, key, vallen,
2172 ((struct obd_id_info*)val)->data, set);
2174 struct mds_capa_info *info = (struct mds_capa_info*)val;
2176 LASSERT(vallen == sizeof(*info));
2178 /* Only want a specific OSC */
2180 !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2183 err = obd_set_info_async(env, tgt->ltd_exp, keylen,
2184 key, sizeof(*info->capa),
2187 /* Only want a specific OSC */
2189 !obd_uuid_equals(val, &tgt->ltd_uuid))
2192 err = obd_set_info_async(env, tgt->ltd_exp,
2193 keylen, key, vallen, val, set);
2202 err = ptlrpc_set_wait(set);
2205 ptlrpc_set_destroy(set);
2210 void lov_stripe_lock(struct lov_stripe_md *md)
2212 LASSERT(md->lsm_lock_owner != current_pid());
2213 spin_lock(&md->lsm_lock);
2214 LASSERT(md->lsm_lock_owner == 0);
2215 md->lsm_lock_owner = current_pid();
2218 void lov_stripe_unlock(struct lov_stripe_md *md)
2220 LASSERT(md->lsm_lock_owner == current_pid());
2221 md->lsm_lock_owner = 0;
2222 spin_unlock(&md->lsm_lock);
2225 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
2226 struct obd_quotactl *oqctl)
2228 struct lov_obd *lov = &obd->u.lov;
2229 struct lov_tgt_desc *tgt;
2231 __u64 bhardlimit = 0;
2235 if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON &&
2236 oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF &&
2237 oqctl->qc_cmd != Q_GETOQUOTA &&
2238 oqctl->qc_cmd != Q_INITQUOTA &&
2239 oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
2240 oqctl->qc_cmd != Q_FINVALIDATE) {
2241 CERROR("bad quota opc %x for lov obd", oqctl->qc_cmd);
2247 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2250 tgt = lov->lov_tgts[i];
2255 if (!tgt->ltd_active || tgt->ltd_reap) {
2256 if (oqctl->qc_cmd == Q_GETOQUOTA &&
2257 lov->lov_tgts[i]->ltd_activate) {
2259 CERROR("ost %d is inactive\n", i);
2261 CDEBUG(D_HA, "ost %d is inactive\n", i);
2266 err = obd_quotactl(tgt->ltd_exp, oqctl);
2268 if (tgt->ltd_active && !rc)
2273 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2274 curspace += oqctl->qc_dqblk.dqb_curspace;
2275 bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
2280 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2281 oqctl->qc_dqblk.dqb_curspace = curspace;
2282 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
2287 static int lov_quotacheck(struct obd_device *obd, struct obd_export *exp,
2288 struct obd_quotactl *oqctl)
2290 struct lov_obd *lov = &obd->u.lov;
2296 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2297 if (!lov->lov_tgts[i])
2300 /* Skip quota check on the administratively disabled OSTs. */
2301 if (!lov->lov_tgts[i]->ltd_activate) {
2302 CWARN("lov idx %d was administratively disabled, "
2303 "skip quotacheck on it.\n", i);
2307 if (!lov->lov_tgts[i]->ltd_active) {
2308 CERROR("lov idx %d inactive\n", i);
2314 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2317 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate)
2320 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
2331 static struct obd_ops lov_obd_ops = {
2332 .o_owner = THIS_MODULE,
2333 .o_setup = lov_setup,
2334 .o_precleanup = lov_precleanup,
2335 .o_cleanup = lov_cleanup,
2336 .o_connect = lov_connect,
2337 .o_disconnect = lov_disconnect,
2338 .o_statfs = lov_statfs,
2339 .o_statfs_async = lov_statfs_async,
2340 .o_packmd = lov_packmd,
2341 .o_unpackmd = lov_unpackmd,
2342 .o_create = lov_create,
2343 .o_destroy = lov_destroy,
2344 .o_getattr_async = lov_getattr_async,
2345 .o_setattr_async = lov_setattr_async,
2346 .o_change_cbdata = lov_change_cbdata,
2347 .o_find_cbdata = lov_find_cbdata,
2348 .o_iocontrol = lov_iocontrol,
2349 .o_get_info = lov_get_info,
2350 .o_set_info_async = lov_set_info_async,
2351 .o_notify = lov_notify,
2352 .o_pool_new = lov_pool_new,
2353 .o_pool_rem = lov_pool_remove,
2354 .o_pool_add = lov_pool_add,
2355 .o_pool_del = lov_pool_del,
2356 .o_getref = lov_getref,
2357 .o_putref = lov_putref,
2358 .o_quotactl = lov_quotactl,
2359 .o_quotacheck = lov_quotacheck,
2362 struct kmem_cache *lov_oinfo_slab;
2364 extern struct lu_kmem_descr lov_caches[];
2366 int __init lov_init(void)
2371 /* print an address of _any_ initialized kernel symbol from this
2372 * module, to allow debugging with gdb that doesn't support data
2373 * symbols from modules.*/
2374 CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
2376 rc = lu_kmem_init(lov_caches);
2380 lov_oinfo_slab = kmem_cache_create("lov_oinfo",
2381 sizeof(struct lov_oinfo), 0,
2382 SLAB_HWCACHE_ALIGN, NULL);
2383 if (lov_oinfo_slab == NULL) {
2384 lu_kmem_fini(lov_caches);
2388 rc = class_register_type(&lov_obd_ops, NULL, NULL,
2389 #ifndef HAVE_ONLY_PROCFS_SEQ
2392 LUSTRE_LOV_NAME, &lov_device_type);
2395 kmem_cache_destroy(lov_oinfo_slab);
2396 lu_kmem_fini(lov_caches);
2403 static void /*__exit*/ lov_exit(void)
2405 class_unregister_type(LUSTRE_LOV_NAME);
2406 kmem_cache_destroy(lov_oinfo_slab);
2407 lu_kmem_fini(lov_caches);
2410 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2411 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2412 MODULE_LICENSE("GPL");
2414 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);