4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/lov/lov_obd.c
34 * Author: Phil Schwan <phil@clusterfs.com>
35 * Author: Peter Braam <braam@clusterfs.com>
36 * Author: Mike Shaver <shaver@clusterfs.com>
37 * Author: Nathan Rutman <nathan@clusterfs.com>
40 #define DEBUG_SUBSYSTEM S_LOV
41 #include <libcfs/libcfs.h>
43 #include <cl_object.h>
44 #include <lustre_dlm.h>
45 #include <lustre_fid.h>
46 #include <uapi/linux/lustre/lustre_ioctl.h>
47 #include <lustre_lib.h>
48 #include <lustre_mds.h>
49 #include <lustre_net.h>
50 #include <uapi/linux/lustre/lustre_param.h>
51 #include <lustre_swab.h>
52 #include <lprocfs_status.h>
53 #include <obd_class.h>
54 #include <obd_support.h>
56 #include "lov_internal.h"
58 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
59 Any function that expects lov_tgts to remain stationary must take a ref. */
60 void lov_tgts_getref(struct obd_device *obd)
62 struct lov_obd *lov = &obd->u.lov;
64 /* nobody gets through here until lov_putref is done */
65 mutex_lock(&lov->lov_lock);
66 atomic_inc(&lov->lov_refcount);
67 mutex_unlock(&lov->lov_lock);
70 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
72 void lov_tgts_putref(struct obd_device *obd)
74 struct lov_obd *lov = &obd->u.lov;
76 mutex_lock(&lov->lov_lock);
77 /* ok to dec to 0 more than once -- ltd_exp's will be null */
78 if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
80 struct lov_tgt_desc *tgt, *n;
83 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
85 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
86 tgt = lov->lov_tgts[i];
88 if (!tgt || !tgt->ltd_reap)
90 list_add(&tgt->ltd_kill, &kill);
91 /* XXX - right now there is a dependency on ld_tgt_count
92 * being the maximum tgt index for computing the
93 * mds_max_easize. So we can't shrink it. */
94 lov_ost_pool_remove(&lov->lov_packed, i);
95 lov->lov_tgts[i] = NULL;
98 mutex_unlock(&lov->lov_lock);
100 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
101 list_del(&tgt->ltd_kill);
103 __lov_del_obd(obd, tgt);
106 mutex_unlock(&lov->lov_lock);
110 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
111 enum obd_notify_event ev);
112 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
113 enum obd_notify_event ev);
115 int lov_connect_osc(struct obd_device *obd, u32 index, int activate,
116 struct obd_connect_data *data)
118 struct lov_obd *lov = &obd->u.lov;
119 struct obd_uuid *tgt_uuid;
120 struct obd_device *tgt_obd;
121 static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
122 struct obd_import *imp;
126 if (lov->lov_tgts[index] == NULL)
129 tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
130 tgt_obd = lov->lov_tgts[index]->ltd_obd;
132 if (!tgt_obd->obd_set_up) {
133 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
137 /* override the sp_me from lov */
138 tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
140 if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
141 data->ocd_index = index;
144 * Divine LOV knows that OBDs under it are OSCs.
146 imp = tgt_obd->u.cli.cl_import;
149 tgt_obd->obd_no_recov = 0;
150 /* FIXME this is probably supposed to be
151 ptlrpc_set_import_active. Horrible naming. */
152 ptlrpc_activate_import(imp, false);
155 rc = obd_register_observer(tgt_obd, obd);
157 CERROR("Target %s register_observer error %d\n",
158 obd_uuid2str(tgt_uuid), rc);
162 if (imp->imp_invalid) {
163 CDEBUG(D_CONFIG, "%s: not connecting - administratively disabled\n",
164 obd_uuid2str(tgt_uuid));
168 rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
169 &lov_osc_uuid, data, lov->lov_cache);
170 if (rc || !lov->lov_tgts[index]->ltd_exp) {
171 CERROR("Target %s connect error %d\n",
172 obd_uuid2str(tgt_uuid), rc);
176 lov->lov_tgts[index]->ltd_reap = 0;
178 CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
179 obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
181 if (lov->lov_tgts_kobj) {
182 /* Even if we failed, that's ok */
183 rc = sysfs_create_link(lov->lov_tgts_kobj,
184 &tgt_obd->obd_kset.kobj,
187 CERROR("%s: can't register LOV target /sys/fs/lustre/%s/%s/target_obds/%s : rc = %d\n",
188 obd->obd_name, obd->obd_type->typ_name,
190 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_name,
197 static int lov_connect(const struct lu_env *env,
198 struct obd_export **exp, struct obd_device *obd,
199 struct obd_uuid *cluuid, struct obd_connect_data *data,
202 struct lov_obd *lov = &obd->u.lov;
203 struct lov_tgt_desc *tgt;
204 struct lustre_handle conn;
208 CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
210 rc = class_connect(&conn, obd, cluuid);
214 *exp = class_conn2export(&conn);
216 /* Why should there ever be more than 1 connect? */
218 LASSERT(lov->lov_connects == 1);
220 memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
222 lov->lov_ocd = *data;
224 lov_tgts_getref(obd);
227 lov->lov_cache = localdata;
228 cl_cache_incref(lov->lov_cache);
231 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
232 tgt = lov->lov_tgts[i];
233 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
235 /* Flags will be lowest common denominator */
236 rc = lov_connect_osc(obd, i, tgt->ltd_activate, &lov->lov_ocd);
238 CERROR("%s: lov connect tgt %d failed: %d\n",
239 obd->obd_name, i, rc);
242 /* connect to administrative disabled ost */
243 if (!lov->lov_tgts[i]->ltd_exp)
246 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
249 CERROR("%s error sending notify %d\n",
254 lov_tgts_putref(obd);
259 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
261 struct lov_obd *lov = &obd->u.lov;
262 struct obd_device *osc_obd;
266 osc_obd = class_exp2obd(tgt->ltd_exp);
267 CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
268 obd->obd_name, osc_obd->obd_name);
270 if (tgt->ltd_active) {
272 lov->desc.ld_active_tgt_count--;
273 tgt->ltd_exp->exp_obd->obd_inactive = 1;
277 if (lov->lov_tgts_kobj)
278 sysfs_remove_link(lov->lov_tgts_kobj,
281 /* Pass it on to our clients.
282 * XXX This should be an argument to disconnect,
283 * XXX not a back-door flag on the OBD. Ah well.
285 osc_obd->obd_force = obd->obd_force;
286 osc_obd->obd_fail = obd->obd_fail;
287 osc_obd->obd_no_recov = obd->obd_no_recov;
289 if (lov->targets_proc_entry != NULL)
290 lprocfs_remove_proc_entry(osc_obd->obd_name,
291 lov->targets_proc_entry);
294 obd_register_observer(osc_obd, NULL);
296 rc = obd_disconnect(tgt->ltd_exp);
298 CERROR("Target %s disconnect error %d\n",
299 tgt->ltd_uuid.uuid, rc);
307 static int lov_disconnect(struct obd_export *exp)
309 struct obd_device *obd = class_exp2obd(exp);
310 struct lov_obd *lov = &obd->u.lov;
318 /* Only disconnect the underlying layers on the final disconnect. */
320 if (lov->lov_connects != 0) {
321 /* why should there be more than 1 connect? */
322 CWARN("%s: unexpected disconnect #%d\n",
323 obd->obd_name, lov->lov_connects);
327 /* hold another ref so lov_del_obd() doesn't spin in putref each time */
328 lov_tgts_getref(obd);
330 for (index = 0; index < lov->desc.ld_tgt_count; index++) {
331 if (lov->lov_tgts[index] && lov->lov_tgts[index]->ltd_exp) {
332 /* Disconnection is the last we know about an OBD */
333 lov_del_target(obd, index, NULL,
334 lov->lov_tgts[index]->ltd_gen);
337 lov_tgts_putref(obd);
340 rc = class_disconnect(exp); /* bz 9811 */
346 * -EINVAL : UUID can't be found in the LOV's target list
347 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
348 * -EBADF : The UUID is found, but the OBD is the wrong type (!)
349 * any >= 0 : is log target index
351 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
352 enum obd_notify_event ev)
354 struct lov_obd *lov = &obd->u.lov;
355 struct lov_tgt_desc *tgt;
356 int index, activate, active;
359 CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
360 lov, uuid->uuid, ev);
362 lov_tgts_getref(obd);
363 for (index = 0; index < lov->desc.ld_tgt_count; index++) {
364 tgt = lov->lov_tgts[index];
367 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
371 if (index == lov->desc.ld_tgt_count)
372 GOTO(out, index = -EINVAL);
374 if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
375 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
378 * LU-642, initially inactive OSC could miss the obd_connect,
379 * we make up for it here.
381 if (activate && !tgt->ltd_exp) {
383 struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
385 rc = obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
386 &lov_osc_uuid, &lov->lov_ocd,
388 if (rc || tgt->ltd_exp == NULL)
389 GOTO(out, index = rc);
392 if (lov->lov_tgts[index]->ltd_activate == activate) {
393 CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
394 uuid->uuid, activate ? "" : "de");
396 lov->lov_tgts[index]->ltd_activate = activate;
397 CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
398 activate ? "" : "de", obd_uuid2str(uuid));
401 } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
402 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
404 if (lov->lov_tgts[index]->ltd_active == active) {
405 CDEBUG(D_INFO, "OSC %s already %sactive!\n",
406 uuid->uuid, active ? "" : "in");
409 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
410 obd_uuid2str(uuid), active ? "" : "in");
413 lov->lov_tgts[index]->ltd_active = active;
415 lov->desc.ld_active_tgt_count++;
416 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
418 lov->desc.ld_active_tgt_count--;
419 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
422 CERROR("%s: unknown event %d for uuid %s\n", obd->obd_name,
427 CDEBUG(D_INFO, "%s: lov idx %d conn %llx\n", obd_uuid2str(uuid),
428 index, tgt->ltd_exp->exp_handle.h_cookie);
431 lov_tgts_putref(obd);
435 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
436 enum obd_notify_event ev)
439 struct lov_obd *lov = &obd->u.lov;
442 down_read(&lov->lov_notify_lock);
443 if (!lov->lov_connects)
444 GOTO(out_notify_lock, rc = 0);
446 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
447 ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
448 struct obd_uuid *uuid;
452 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
453 CERROR("unexpected notification of %s %s\n",
454 watched->obd_type->typ_name, watched->obd_name);
455 GOTO(out_notify_lock, rc = -EINVAL);
458 uuid = &watched->u.cli.cl_target_uuid;
460 /* Set OSC as active before notifying the observer, so the
461 * observer can use the OSC normally.
463 rc = lov_set_osc_active(obd, uuid, ev);
465 CERROR("%s: event %d failed: rc = %d\n", obd->obd_name,
467 GOTO(out_notify_lock, rc);
471 /* Pass the notification up the chain. */
472 rc = obd_notify_observer(obd, watched, ev);
475 up_read(&lov->lov_notify_lock);
480 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
481 u32 index, int gen, int active)
483 struct lov_obd *lov = &obd->u.lov;
484 struct lov_tgt_desc *tgt;
485 struct obd_device *tgt_obd;
489 CDEBUG(D_CONFIG, "uuid:%s idx:%u gen:%d active:%d\n",
490 uuidp->uuid, index, gen, active);
493 CERROR("%s: request to add '%s' with invalid generation: %d\n",
494 obd->obd_name, uuidp->uuid, gen);
498 tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME, &obd->obd_uuid);
502 mutex_lock(&lov->lov_lock);
504 if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
505 tgt = lov->lov_tgts[index];
507 CERROR("%s: UUID %s already assigned at index %d: rc = %d\n",
508 obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), index, rc);
509 mutex_unlock(&lov->lov_lock);
513 if (index >= lov->lov_tgt_size) {
514 /* We need to reallocate the lov target array. */
515 struct lov_tgt_desc **newtgts, **old = NULL;
516 __u32 newsize, oldsize = 0;
518 newsize = max(lov->lov_tgt_size, (__u32)2);
519 while (newsize < index + 1)
520 newsize = newsize << 1;
521 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
522 if (newtgts == NULL) {
523 mutex_unlock(&lov->lov_lock);
527 if (lov->lov_tgt_size) {
528 memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
531 oldsize = lov->lov_tgt_size;
534 lov->lov_tgts = newtgts;
535 lov->lov_tgt_size = newsize;
538 OBD_FREE(old, sizeof(*old) * oldsize);
540 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
541 lov->lov_tgts, lov->lov_tgt_size);
546 mutex_unlock(&lov->lov_lock);
550 rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
552 mutex_unlock(&lov->lov_lock);
557 tgt->ltd_uuid = *uuidp;
558 tgt->ltd_obd = tgt_obd;
559 /* XXX - add a sanity check on the generation number. */
561 tgt->ltd_index = index;
562 tgt->ltd_activate = active;
563 lov->lov_tgts[index] = tgt;
564 if (index >= lov->desc.ld_tgt_count)
565 lov->desc.ld_tgt_count = index + 1;
567 mutex_unlock(&lov->lov_lock);
569 CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
570 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
572 if (lov->lov_connects == 0) {
573 /* lov_connect hasn't been called yet. We'll do the
574 lov_connect_osc on this target when that fn first runs,
575 because we don't know the connect flags yet. */
579 lov_tgts_getref(obd);
581 rc = lov_connect_osc(obd, index, active, &lov->lov_ocd);
585 /* connect to administrative disabled ost */
589 rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
590 active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE);
594 CERROR("%s: add failed, deleting %s: rc = %d\n",
595 obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), rc);
596 lov_del_target(obd, index, NULL, 0);
598 lov_tgts_putref(obd);
602 /* Schedule a target for deletion */
603 int lov_del_target(struct obd_device *obd, u32 index,
604 struct obd_uuid *uuidp, int gen)
606 struct lov_obd *lov = &obd->u.lov;
607 int count = lov->desc.ld_tgt_count;
611 if (index >= count) {
612 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
617 /* to make sure there's no ongoing lov_notify() now */
618 down_write(&lov->lov_notify_lock);
619 lov_tgts_getref(obd);
621 if (!lov->lov_tgts[index]) {
622 CERROR("LOV target at index %d is not setup.\n", index);
623 GOTO(out, rc = -EINVAL);
626 if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
627 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
628 lov_uuid2str(lov, index), index,
629 obd_uuid2str(uuidp));
630 GOTO(out, rc = -EINVAL);
633 CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
634 lov_uuid2str(lov, index), index,
635 lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
636 lov->lov_tgts[index]->ltd_active);
638 lov->lov_tgts[index]->ltd_reap = 1;
639 lov->lov_death_row++;
640 /* we really delete it from lov_tgts_putref() */
642 lov_tgts_putref(obd);
643 up_write(&lov->lov_notify_lock);
648 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
650 struct obd_device *osc_obd;
653 LASSERT(tgt->ltd_reap);
655 osc_obd = class_exp2obd(tgt->ltd_exp);
657 CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
659 osc_obd ? osc_obd->obd_name : "<no obd>");
662 lov_disconnect_obd(obd, tgt);
666 /* Manual cleanup - no cleanup logs to clean up the osc's. We must
667 do it ourselves. And we can't do it from lov_cleanup,
668 because we just lost our only reference to it. */
670 class_manual_cleanup(osc_obd);
673 void lov_fix_desc_stripe_size(__u64 *val)
675 if (*val < LOV_MIN_STRIPE_SIZE) {
677 LCONSOLE_INFO("Increasing default stripe size to "
679 LOV_DESC_STRIPE_SIZE_DEFAULT);
680 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
681 } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
682 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
683 LCONSOLE_WARN("Changing default stripe size to %llu (a "
685 *val, LOV_MIN_STRIPE_SIZE);
689 void lov_fix_desc_stripe_count(__u32 *val)
695 void lov_fix_desc_pattern(__u32 *val)
697 /* from lov_setstripe */
698 if ((*val != 0) && !lov_pattern_supported_normal_comp(*val)) {
699 LCONSOLE_WARN("lov: Unknown stripe pattern: %#x\n", *val);
704 void lov_fix_desc_qos_maxage(__u32 *val)
707 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
710 void lov_fix_desc(struct lov_desc *desc)
712 lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
713 lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
714 lov_fix_desc_pattern(&desc->ld_pattern);
715 lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
718 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
720 struct lov_desc *desc;
721 struct lov_obd *lov = &obd->u.lov;
725 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
726 CERROR("LOV setup requires a descriptor\n");
730 desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
732 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
733 CERROR("descriptor size wrong: %d > %d\n",
734 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
738 if (desc->ld_magic != LOV_DESC_MAGIC) {
739 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
740 CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
741 obd->obd_name, desc);
742 lustre_swab_lov_desc(desc);
744 CERROR("%s: Bad lov desc magic: %#x\n",
745 obd->obd_name, desc->ld_magic);
752 desc->ld_active_tgt_count = 0;
754 lov->lov_tgt_size = 0;
756 mutex_init(&lov->lov_lock);
757 atomic_set(&lov->lov_refcount, 0);
758 lov->lov_sp_me = LUSTRE_SP_CLI;
760 init_rwsem(&lov->lov_notify_lock);
762 lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
764 HASH_POOLS_BKT_BITS, 0,
767 &pool_hash_operations,
769 INIT_LIST_HEAD(&lov->lov_pool_list);
770 lov->lov_pool_count = 0;
771 rc = lov_ost_pool_init(&lov->lov_packed, 0);
775 rc = lov_tunables_init(obd);
779 lov->lov_tgts_kobj = kobject_create_and_add("target_obds",
780 &obd->obd_kset.kobj);
786 static int lov_cleanup(struct obd_device *obd)
788 struct lov_obd *lov = &obd->u.lov;
789 struct list_head *pos, *tmp;
790 struct pool_desc *pool;
793 if (lov->lov_tgts_kobj) {
794 kobject_put(lov->lov_tgts_kobj);
795 lov->lov_tgts_kobj = NULL;
798 list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
799 pool = list_entry(pos, struct pool_desc, pool_list);
800 /* free pool structs */
801 CDEBUG(D_INFO, "delete pool %p\n", pool);
802 /* In the function below, .hs_keycmp resolves to
803 * pool_hashkey_keycmp() */
804 /* coverity[overrun-buffer-val] */
805 lov_pool_del(obd, pool->pool_name);
807 cfs_hash_putref(lov->lov_pools_hash_body);
808 lov_ost_pool_free(&lov->lov_packed);
810 lprocfs_obd_cleanup(obd);
813 lov_tgts_getref(obd);
814 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
815 if (!lov->lov_tgts[i])
818 /* Inactive targets may never have connected */
819 if (lov->lov_tgts[i]->ltd_active ||
820 atomic_read(&lov->lov_refcount))
821 /* We should never get here - these
822 * should have been removed in the
824 CERROR("%s: lov tgt %d not cleaned! "
825 "deathrow=%d, lovrc=%d\n",
826 obd->obd_name, i, lov->lov_death_row,
827 atomic_read(&lov->lov_refcount));
828 lov_del_target(obd, i, NULL, 0);
830 lov_tgts_putref(obd);
831 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
833 lov->lov_tgt_size = 0;
836 if (lov->lov_cache != NULL) {
837 cl_cache_decref(lov->lov_cache);
838 lov->lov_cache = NULL;
844 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
845 u32 *indexp, int *genp)
847 struct obd_uuid obd_uuid;
852 switch (cmd = lcfg->lcfg_command) {
856 case LCFG_LOV_ADD_OBD:
857 case LCFG_LOV_ADD_INA:
858 case LCFG_LOV_DEL_OBD: {
862 /* lov_modify_tgts add 0:lov_mdsA 1:ost1_UUID 2:0 3:1 */
863 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
864 GOTO(out, rc = -EINVAL);
866 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
868 rc = kstrtou32(lustre_cfg_buf(lcfg, 2), 10, indexp);
871 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
876 if (cmd == LCFG_LOV_ADD_OBD)
877 rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
878 else if (cmd == LCFG_LOV_ADD_INA)
879 rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
881 rc = lov_del_target(obd, index, &obd_uuid, gen);
886 struct lov_desc *desc = &(obd->u.lov.desc);
890 GOTO(out, rc = -EINVAL);
892 count = class_modify_config(lcfg, PARAM_LOV,
893 &obd->obd_kset.kobj);
894 GOTO(out, rc = count < 0 ? count : 0);
903 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
904 GOTO(out, rc = -EINVAL);
912 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
913 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
915 struct obd_device *obd = class_exp2obd(exp);
916 struct lov_obd *lov = &obd->u.lov;
917 struct obd_info oinfo = {
921 struct ptlrpc_request_set *rqset;
922 struct lov_request_set *set = NULL;
923 struct lov_request *req;
929 rqset = ptlrpc_prep_set();
933 rc = lov_prep_statfs_set(obd, &oinfo, &set);
937 list_for_each_entry(req, &set->set_list, rq_link) {
938 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
939 &req->rq_oi, max_age, rqset);
944 rc = ptlrpc_set_wait(env, rqset);
948 atomic_set(&set->set_completes, 0);
950 rc2 = lov_fini_statfs_set(set);
955 ptlrpc_set_destroy(rqset);
960 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
961 void *karg, void __user *uarg)
963 struct obd_device *obd = class_exp2obd(exp);
964 struct lov_obd *lov = &obd->u.lov;
965 int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
966 struct obd_uuid *uuidp;
970 case IOC_OBD_STATFS: {
971 struct obd_ioctl_data *data = karg;
972 struct obd_device *osc_obd;
973 struct obd_statfs stat_buf = {0};
974 struct obd_import *imp;
978 memcpy(&index, data->ioc_inlbuf2, sizeof(index));
982 if (!lov->lov_tgts[index])
983 /* Try again with the next index */
986 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
990 imp = osc_obd->u.cli.cl_import;
991 if (!lov->lov_tgts[index]->ltd_active &&
992 imp->imp_state != LUSTRE_IMP_IDLE)
996 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
997 min_t(unsigned long, data->ioc_plen2,
998 sizeof(struct obd_uuid))))
1001 memcpy(&flags, data->ioc_inlbuf1, sizeof(flags));
1002 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
1004 /* got statfs data */
1005 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1006 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
1010 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1011 min_t(unsigned long, data->ioc_plen1,
1012 sizeof(struct obd_statfs))))
1016 case OBD_IOC_LOV_GET_CONFIG: {
1017 struct obd_ioctl_data *data;
1018 struct lov_desc *desc;
1023 if (obd_ioctl_getdata(&buf, &len, uarg))
1026 data = (struct obd_ioctl_data *)buf;
1028 if (sizeof(*desc) > data->ioc_inllen1) {
1029 OBD_FREE_LARGE(buf, len);
1033 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1034 OBD_FREE_LARGE(buf, len);
1038 if (sizeof(__u32) * count > data->ioc_inllen3) {
1039 OBD_FREE_LARGE(buf, len);
1043 desc = (struct lov_desc *)data->ioc_inlbuf1;
1044 memcpy(desc, &(lov->desc), sizeof(*desc));
1046 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1047 genp = (__u32 *)data->ioc_inlbuf3;
1048 /* the uuid will be empty for deleted OSTs */
1049 for (i = 0; i < count; i++, uuidp++, genp++) {
1050 if (!lov->lov_tgts[i])
1052 *uuidp = lov->lov_tgts[i]->ltd_uuid;
1053 *genp = lov->lov_tgts[i]->ltd_gen;
1056 if (copy_to_user(uarg, buf, len))
1058 OBD_FREE_LARGE(buf, len);
1061 case OBD_IOC_QUOTACTL: {
1062 struct if_quotactl *qctl = karg;
1063 struct lov_tgt_desc *tgt = NULL;
1064 struct obd_quotactl *oqctl;
1066 if (qctl->qc_valid == QC_OSTIDX) {
1067 if (count <= qctl->qc_idx)
1070 tgt = lov->lov_tgts[qctl->qc_idx];
1071 if (!tgt || !tgt->ltd_exp)
1073 } else if (qctl->qc_valid == QC_UUID) {
1074 for (i = 0; i < count; i++) {
1075 tgt = lov->lov_tgts[i];
1077 !obd_uuid_equals(&tgt->ltd_uuid,
1081 if (tgt->ltd_exp == NULL)
1093 LASSERT(tgt && tgt->ltd_exp);
1094 OBD_ALLOC_PTR(oqctl);
1098 QCTL_COPY(oqctl, qctl);
1099 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1101 QCTL_COPY(qctl, oqctl);
1102 qctl->qc_valid = QC_OSTIDX;
1103 qctl->obd_uuid = tgt->ltd_uuid;
1105 OBD_FREE_PTR(oqctl);
1114 for (i = 0; i < count; i++) {
1116 struct obd_device *osc_obd;
1118 /* OST was disconnected */
1119 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1122 /* ll_umount_begin() sets force on lov, pass to osc */
1123 osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1124 osc_obd->obd_force = obd->obd_force;
1125 err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1128 if (lov->lov_tgts[i]->ltd_active) {
1129 CDEBUG(err == -ENOTTY ?
1130 D_IOCTL : D_WARNING,
1131 "iocontrol OSC %s on OST "
1132 "idx %d cmd %x: err = %d\n",
1133 lov_uuid2str(lov, i),
1150 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1151 __u32 keylen, void *key, __u32 *vallen, void *val)
1153 struct obd_device *obddev = class_exp2obd(exp);
1154 struct lov_obd *lov = &obddev->u.lov;
1155 struct lov_desc *ld = &lov->desc;
1159 if (vallen == NULL || val == NULL)
1162 lov_tgts_getref(obddev);
1164 if (KEY_IS(KEY_MAX_EASIZE)) {
1165 *((u32 *)val) = exp->exp_connect_data.ocd_max_easize;
1166 } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
1167 u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
1168 LOV_MAX_STRIPE_COUNT);
1170 *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
1171 } else if (KEY_IS(KEY_TGT_COUNT)) {
1172 *((int *)val) = lov->desc.ld_tgt_count;
1177 lov_tgts_putref(obddev);
1182 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
1183 __u32 keylen, void *key,
1184 __u32 vallen, void *val,
1185 struct ptlrpc_request_set *set)
1187 struct obd_device *obddev = class_exp2obd(exp);
1188 struct lov_obd *lov = &obddev->u.lov;
1189 struct lov_tgt_desc *tgt;
1190 bool do_inactive = false, no_set = false;
1199 set = ptlrpc_prep_set();
1204 lov_tgts_getref(obddev);
1206 if (KEY_IS(KEY_CHECKSUM))
1209 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1210 tgt = lov->lov_tgts[i];
1212 /* OST was disconnected */
1213 if (tgt == NULL || tgt->ltd_exp == NULL)
1216 /* OST is inactive and we don't want inactive OSCs */
1217 if (!tgt->ltd_active && !do_inactive)
1220 err = obd_set_info_async(env, tgt->ltd_exp, keylen, key,
1227 /* cycle through MDC target for Data-on-MDT */
1228 for (i = 0; i < LOV_MDC_TGT_MAX; i++) {
1229 struct obd_device *mdc;
1231 mdc = lov->lov_mdc_tgts[i].lmtd_mdc;
1235 err = obd_set_info_async(env, mdc->obd_self_export,
1236 keylen, key, vallen, val, set);
1241 lov_tgts_putref(obddev);
1243 err = ptlrpc_set_wait(env, set);
1246 ptlrpc_set_destroy(set);
1251 void lov_stripe_lock(struct lov_stripe_md *md)
1252 __acquires(&md->lsm_lock)
1254 LASSERT(md->lsm_lock_owner != current_pid());
1255 spin_lock(&md->lsm_lock);
1256 LASSERT(md->lsm_lock_owner == 0);
1257 md->lsm_lock_owner = current_pid();
1260 void lov_stripe_unlock(struct lov_stripe_md *md)
1261 __releases(&md->lsm_lock)
1263 LASSERT(md->lsm_lock_owner == current_pid());
1264 md->lsm_lock_owner = 0;
1265 spin_unlock(&md->lsm_lock);
1268 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
1269 struct obd_quotactl *oqctl)
1271 struct lov_obd *lov = &obd->u.lov;
1272 struct lov_tgt_desc *tgt;
1274 __u64 bhardlimit = 0;
1278 if (oqctl->qc_cmd != Q_GETOQUOTA &&
1279 oqctl->qc_cmd != LUSTRE_Q_SETQUOTA) {
1280 CERROR("%s: bad quota opc %x for lov obd\n",
1281 obd->obd_name, oqctl->qc_cmd);
1286 lov_tgts_getref(obd);
1287 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1290 tgt = lov->lov_tgts[i];
1295 if (!tgt->ltd_active || tgt->ltd_reap) {
1296 if (oqctl->qc_cmd == Q_GETOQUOTA &&
1297 lov->lov_tgts[i]->ltd_activate) {
1299 CERROR("ost %d is inactive\n", i);
1301 CDEBUG(D_HA, "ost %d is inactive\n", i);
1306 err = obd_quotactl(tgt->ltd_exp, oqctl);
1308 if (tgt->ltd_active && !rc)
1313 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1314 curspace += oqctl->qc_dqblk.dqb_curspace;
1315 bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
1318 lov_tgts_putref(obd);
1320 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1321 oqctl->qc_dqblk.dqb_curspace = curspace;
1322 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
1327 static struct obd_ops lov_obd_ops = {
1328 .o_owner = THIS_MODULE,
1329 .o_setup = lov_setup,
1330 .o_cleanup = lov_cleanup,
1331 .o_connect = lov_connect,
1332 .o_disconnect = lov_disconnect,
1333 .o_statfs = lov_statfs,
1334 .o_iocontrol = lov_iocontrol,
1335 .o_get_info = lov_get_info,
1336 .o_set_info_async = lov_set_info_async,
1337 .o_notify = lov_notify,
1338 .o_pool_new = lov_pool_new,
1339 .o_pool_rem = lov_pool_remove,
1340 .o_pool_add = lov_pool_add,
1341 .o_pool_del = lov_pool_del,
1342 .o_quotactl = lov_quotactl,
1345 struct kmem_cache *lov_oinfo_slab;
1347 static int __init lov_init(void)
1352 /* print an address of _any_ initialized kernel symbol from this
1353 * module, to allow debugging with gdb that doesn't support data
1354 * symbols from modules.*/
1355 CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
1357 rc = lu_kmem_init(lov_caches);
1361 lov_oinfo_slab = kmem_cache_create("lov_oinfo",
1362 sizeof(struct lov_oinfo), 0,
1363 SLAB_HWCACHE_ALIGN, NULL);
1364 if (lov_oinfo_slab == NULL) {
1365 lu_kmem_fini(lov_caches);
1369 rc = class_register_type(&lov_obd_ops, NULL, true, NULL,
1370 LUSTRE_LOV_NAME, &lov_device_type);
1372 kmem_cache_destroy(lov_oinfo_slab);
1373 lu_kmem_fini(lov_caches);
1379 static void __exit lov_exit(void)
1381 class_unregister_type(LUSTRE_LOV_NAME);
1382 kmem_cache_destroy(lov_oinfo_slab);
1383 lu_kmem_fini(lov_caches);
1386 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1387 MODULE_DESCRIPTION("Lustre Logical Object Volume");
1388 MODULE_VERSION(LUSTRE_VERSION_STRING);
1389 MODULE_LICENSE("GPL");
1391 module_init(lov_init);
1392 module_exit(lov_exit);