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 tgt_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_notify(struct obd_device *obd, struct obd_device *watched,
111 enum obd_notify_event ev);
113 int lov_connect_osc(struct obd_device *obd, u32 index, int activate,
114 struct obd_connect_data *data)
116 struct lov_obd *lov = &obd->u.lov;
117 struct obd_uuid *tgt_uuid;
118 struct obd_device *tgt_obd;
119 static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
120 struct obd_import *imp;
124 if (lov->lov_tgts[index] == NULL)
127 tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
128 tgt_obd = lov->lov_tgts[index]->ltd_obd;
130 if (!tgt_obd->obd_set_up) {
131 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
135 /* override the sp_me from lov */
136 tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
138 if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
139 data->ocd_index = index;
142 * Divine LOV knows that OBDs under it are OSCs.
144 imp = tgt_obd->u.cli.cl_import;
147 tgt_obd->obd_no_recov = 0;
148 /* FIXME this is probably supposed to be
149 ptlrpc_set_import_active. Horrible naming. */
150 ptlrpc_activate_import(imp, false);
153 rc = obd_register_observer(tgt_obd, obd);
155 CERROR("Target %s register_observer error %d\n",
156 obd_uuid2str(tgt_uuid), rc);
160 if (imp->imp_invalid) {
161 CDEBUG(D_CONFIG, "%s: not connecting - administratively disabled\n",
162 obd_uuid2str(tgt_uuid));
166 rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
167 &lov_osc_uuid, data, lov->lov_cache);
168 if (rc || !lov->lov_tgts[index]->ltd_exp) {
169 CERROR("Target %s connect error %d\n",
170 obd_uuid2str(tgt_uuid), rc);
174 lov->lov_tgts[index]->ltd_reap = 0;
176 CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
177 obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
179 if (lov->lov_tgts_kobj) {
180 /* Even if we failed, that's ok */
181 rc = sysfs_create_link(lov->lov_tgts_kobj,
182 &tgt_obd->obd_kset.kobj,
185 CERROR("%s: can't register LOV target /sys/fs/lustre/%s/%s/target_obds/%s : rc = %d\n",
186 obd->obd_name, obd->obd_type->typ_name,
188 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_name,
195 static int lov_connect(const struct lu_env *env,
196 struct obd_export **exp, struct obd_device *obd,
197 struct obd_uuid *cluuid, struct obd_connect_data *data,
200 struct lov_obd *lov = &obd->u.lov;
201 struct lov_tgt_desc *tgt;
202 struct lustre_handle conn;
206 CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
208 rc = class_connect(&conn, obd, cluuid);
212 *exp = class_conn2export(&conn);
214 /* Why should there ever be more than 1 connect? */
216 LASSERT(lov->lov_connects == 1);
218 memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
220 lov->lov_ocd = *data;
222 lov_tgts_getref(obd);
225 lov->lov_cache = localdata;
226 cl_cache_incref(lov->lov_cache);
229 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
230 tgt = lov->lov_tgts[i];
231 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
233 /* Flags will be lowest common denominator */
234 rc = lov_connect_osc(obd, i, tgt->ltd_activate, &lov->lov_ocd);
236 CERROR("%s: lov connect tgt %d failed: %d\n",
237 obd->obd_name, i, rc);
240 /* connect to administrative disabled ost */
241 if (!lov->lov_tgts[i]->ltd_exp)
244 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
247 CERROR("%s error sending notify %d\n",
252 lov_tgts_putref(obd);
257 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
259 struct lov_obd *lov = &obd->u.lov;
260 struct obd_device *osc_obd;
264 osc_obd = class_exp2obd(tgt->ltd_exp);
265 CDEBUG(D_CONFIG, "%s: disconnecting target %s\n", obd->obd_name,
266 osc_obd ? osc_obd->obd_name : "<no obd>");
268 if (tgt->ltd_active) {
270 lov->desc.ld_active_tgt_count--;
271 tgt->ltd_exp->exp_obd->obd_inactive = 1;
275 if (lov->lov_tgts_kobj)
276 sysfs_remove_link(lov->lov_tgts_kobj,
279 /* Pass it on to our clients.
280 * XXX This should be an argument to disconnect,
281 * XXX not a back-door flag on the OBD. Ah well.
283 osc_obd->obd_force = obd->obd_force;
284 osc_obd->obd_fail = obd->obd_fail;
285 osc_obd->obd_no_recov = obd->obd_no_recov;
288 obd_register_observer(osc_obd, NULL);
290 rc = obd_disconnect(tgt->ltd_exp);
292 CERROR("Target %s disconnect error %d\n",
293 tgt->ltd_uuid.uuid, rc);
301 static int lov_disconnect(struct obd_export *exp)
303 struct obd_device *obd = class_exp2obd(exp);
304 struct lov_obd *lov = &obd->u.lov;
312 /* Only disconnect the underlying layers on the final disconnect. */
314 if (lov->lov_connects != 0) {
315 /* why should there be more than 1 connect? */
316 CWARN("%s: unexpected disconnect #%d\n",
317 obd->obd_name, lov->lov_connects);
321 /* hold another ref so lov_del_obd() doesn't spin in putref each time */
322 lov_tgts_getref(obd);
324 for (index = 0; index < lov->desc.ld_tgt_count; index++) {
325 if (lov->lov_tgts[index] && lov->lov_tgts[index]->ltd_exp) {
326 /* Disconnection is the last we know about an OBD */
327 lov_del_target(obd, index, NULL,
328 lov->lov_tgts[index]->ltd_gen);
331 lov_tgts_putref(obd);
334 rc = class_disconnect(exp); /* bz 9811 */
340 * -EINVAL : UUID can't be found in the LOV's target list
341 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
342 * -EBADF : The UUID is found, but the OBD is the wrong type (!)
343 * any >= 0 : is log target index
345 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
346 enum obd_notify_event ev)
348 struct lov_obd *lov = &obd->u.lov;
349 struct lov_tgt_desc *tgt;
351 bool activate, active;
354 CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
355 lov, uuid->uuid, ev);
357 lov_tgts_getref(obd);
358 for (index = 0; index < lov->desc.ld_tgt_count; index++) {
359 tgt = lov->lov_tgts[index];
360 if (tgt && obd_uuid_equals(uuid, &tgt->ltd_uuid))
364 if (index == lov->desc.ld_tgt_count)
365 GOTO(out, index = -EINVAL);
367 if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
368 activate = (ev == OBD_NOTIFY_ACTIVATE);
371 * LU-642, initially inactive OSC could miss the obd_connect,
372 * we make up for it here.
374 if (activate && !tgt->ltd_exp) {
376 struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
378 rc = obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
379 &lov_osc_uuid, &lov->lov_ocd,
381 if (rc || !tgt->ltd_exp)
382 GOTO(out, index = rc);
385 if (lov->lov_tgts[index]->ltd_activate == activate) {
386 CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
387 uuid->uuid, activate ? "" : "de");
389 lov->lov_tgts[index]->ltd_activate = activate;
390 CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
391 activate ? "" : "de", obd_uuid2str(uuid));
393 } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
394 active = (ev == OBD_NOTIFY_ACTIVE);
396 if (lov->lov_tgts[index]->ltd_active == active) {
397 CDEBUG(D_INFO, "OSC %s already %sactive!\n",
398 uuid->uuid, active ? "" : "in");
401 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
402 obd_uuid2str(uuid), active ? "" : "in");
404 lov->lov_tgts[index]->ltd_active = active;
406 lov->desc.ld_active_tgt_count++;
407 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
409 lov->desc.ld_active_tgt_count--;
410 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
413 CERROR("%s: unknown event %d for uuid %s\n", obd->obd_name,
418 CDEBUG(D_INFO, "%s: lov idx %d conn %llx\n", obd_uuid2str(uuid),
419 index, tgt->ltd_exp->exp_handle.h_cookie);
422 lov_tgts_putref(obd);
426 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
427 enum obd_notify_event ev)
430 struct lov_obd *lov = &obd->u.lov;
433 down_read(&lov->lov_notify_lock);
434 if (!lov->lov_connects)
435 GOTO(out_notify_lock, rc = 0);
437 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
438 ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
439 struct obd_uuid *uuid;
443 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
444 CERROR("unexpected notification of %s %s\n",
445 watched->obd_type->typ_name, watched->obd_name);
446 GOTO(out_notify_lock, rc = -EINVAL);
449 uuid = &watched->u.cli.cl_target_uuid;
451 /* Set OSC as active before notifying the observer, so the
452 * observer can use the OSC normally.
454 rc = lov_set_osc_active(obd, uuid, ev);
456 CERROR("%s: event %d failed: rc = %d\n", obd->obd_name,
458 GOTO(out_notify_lock, rc);
462 /* Pass the notification up the chain. */
463 rc = obd_notify_observer(obd, watched, ev);
466 up_read(&lov->lov_notify_lock);
471 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
472 u32 index, int gen, int active)
474 struct lov_obd *lov = &obd->u.lov;
475 struct lov_tgt_desc *tgt;
476 struct obd_device *tgt_obd;
480 CDEBUG(D_CONFIG, "uuid:%s idx:%u gen:%d active:%d\n",
481 uuidp->uuid, index, gen, active);
484 CERROR("%s: request to add '%s' with invalid generation: %d\n",
485 obd->obd_name, uuidp->uuid, gen);
489 tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME, &obd->obd_uuid);
493 mutex_lock(&lov->lov_lock);
495 if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
496 tgt = lov->lov_tgts[index];
498 CERROR("%s: UUID %s already assigned at index %d: rc = %d\n",
499 obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), index, rc);
500 mutex_unlock(&lov->lov_lock);
504 if (index >= lov->lov_tgt_size) {
505 /* We need to reallocate the lov target array. */
506 struct lov_tgt_desc **newtgts, **old = NULL;
507 __u32 newsize, oldsize = 0;
509 newsize = max(lov->lov_tgt_size, 2U);
510 while (newsize < index + 1)
511 newsize = newsize << 1;
512 OBD_ALLOC_PTR_ARRAY(newtgts, newsize);
513 if (newtgts == NULL) {
514 mutex_unlock(&lov->lov_lock);
518 if (lov->lov_tgt_size) {
519 memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
522 oldsize = lov->lov_tgt_size;
525 lov->lov_tgts = newtgts;
526 lov->lov_tgt_size = newsize;
529 OBD_FREE_PTR_ARRAY(old, oldsize);
531 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
532 lov->lov_tgts, lov->lov_tgt_size);
537 mutex_unlock(&lov->lov_lock);
541 rc = tgt_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
543 mutex_unlock(&lov->lov_lock);
548 tgt->ltd_uuid = *uuidp;
549 tgt->ltd_obd = tgt_obd;
550 /* XXX - add a sanity check on the generation number. */
552 tgt->ltd_index = index;
553 tgt->ltd_activate = active;
554 lov->lov_tgts[index] = tgt;
555 if (index >= lov->desc.ld_tgt_count)
556 lov->desc.ld_tgt_count = index + 1;
558 mutex_unlock(&lov->lov_lock);
560 CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
561 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
563 if (lov->lov_connects == 0) {
564 /* lov_connect hasn't been called yet. We'll do the
565 lov_connect_osc on this target when that fn first runs,
566 because we don't know the connect flags yet. */
570 lov_tgts_getref(obd);
572 rc = lov_connect_osc(obd, index, active, &lov->lov_ocd);
576 /* connect to administrative disabled ost */
580 rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
581 active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE);
585 CERROR("%s: add failed, deleting %s: rc = %d\n",
586 obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), rc);
587 lov_del_target(obd, index, NULL, 0);
589 lov_tgts_putref(obd);
593 /* Schedule a target for deletion */
594 int lov_del_target(struct obd_device *obd, u32 index,
595 struct obd_uuid *uuidp, int gen)
597 struct lov_obd *lov = &obd->u.lov;
598 int count = lov->desc.ld_tgt_count;
602 if (index >= count) {
603 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
608 /* to make sure there's no ongoing lov_notify() now */
609 down_write(&lov->lov_notify_lock);
610 lov_tgts_getref(obd);
612 if (!lov->lov_tgts[index]) {
613 CERROR("LOV target at index %d is not setup.\n", index);
614 GOTO(out, rc = -EINVAL);
617 if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
618 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
619 lov_uuid2str(lov, index), index,
620 obd_uuid2str(uuidp));
621 GOTO(out, rc = -EINVAL);
624 CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
625 lov_uuid2str(lov, index), index,
626 lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
627 lov->lov_tgts[index]->ltd_active);
629 lov->lov_tgts[index]->ltd_reap = 1;
630 lov->lov_death_row++;
631 /* we really delete it from lov_tgts_putref() */
633 lov_tgts_putref(obd);
634 up_write(&lov->lov_notify_lock);
639 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
641 struct obd_device *osc_obd;
644 LASSERT(tgt->ltd_reap);
646 osc_obd = class_exp2obd(tgt->ltd_exp);
648 CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
650 osc_obd ? osc_obd->obd_name : "<no obd>");
653 lov_disconnect_obd(obd, tgt);
657 /* Manual cleanup - no cleanup logs to clean up the osc's. We must
658 do it ourselves. And we can't do it from lov_cleanup,
659 because we just lost our only reference to it. */
661 class_manual_cleanup(osc_obd);
664 void lov_fix_desc_stripe_size(__u64 *val)
666 if (*val < LOV_MIN_STRIPE_SIZE) {
668 LCONSOLE_INFO("Increasing default stripe size to "
670 LOV_DESC_STRIPE_SIZE_DEFAULT);
671 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
672 } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
673 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
674 LCONSOLE_WARN("Changing default stripe size to %llu (a "
676 *val, LOV_MIN_STRIPE_SIZE);
680 void lov_fix_desc_stripe_count(__u32 *val)
686 void lov_fix_desc_pattern(__u32 *val)
688 /* from lov_setstripe */
689 if ((*val != 0) && !lov_pattern_supported_normal_comp(*val)) {
690 LCONSOLE_WARN("lov: Unknown stripe pattern: %#x\n", *val);
695 void lov_fix_desc_qos_maxage(__u32 *val)
698 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
701 void lov_fix_desc(struct lov_desc *desc)
703 lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
704 lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
705 lov_fix_desc_pattern(&desc->ld_pattern);
706 lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
709 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
711 struct lov_desc *desc;
712 struct lov_obd *lov = &obd->u.lov;
716 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
717 CERROR("LOV setup requires a descriptor\n");
721 desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
723 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
724 CERROR("descriptor size wrong: %d > %d\n",
725 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
729 if (desc->ld_magic != LOV_DESC_MAGIC) {
730 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
731 CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
732 obd->obd_name, desc);
733 lustre_swab_lov_desc(desc);
735 CERROR("%s: Bad lov desc magic: %#x\n",
736 obd->obd_name, desc->ld_magic);
743 desc->ld_active_tgt_count = 0;
745 lov->lov_tgt_size = 0;
747 mutex_init(&lov->lov_lock);
748 atomic_set(&lov->lov_refcount, 0);
749 lov->lov_sp_me = LUSTRE_SP_CLI;
751 init_rwsem(&lov->lov_notify_lock);
753 INIT_LIST_HEAD(&lov->lov_pool_list);
754 lov->lov_pool_count = 0;
755 rc = lov_pool_hash_init(&lov->lov_pools_hash_body);
759 rc = tgt_pool_init(&lov->lov_packed, 0);
763 rc = lov_tunables_init(obd);
767 lov->lov_tgts_kobj = kobject_create_and_add("target_obds",
768 &obd->obd_kset.kobj);
774 static int lov_cleanup(struct obd_device *obd)
776 struct lov_obd *lov = &obd->u.lov;
777 struct list_head *pos, *tmp;
778 struct pool_desc *pool;
781 if (lov->lov_tgts_kobj) {
782 kobject_put(lov->lov_tgts_kobj);
783 lov->lov_tgts_kobj = NULL;
786 list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
787 pool = list_entry(pos, struct pool_desc, pool_list);
788 /* free pool structs */
789 CDEBUG(D_INFO, "delete pool %p\n", pool);
790 /* In the function below, .hs_keycmp resolves to
791 * pool_hashkey_keycmp() */
792 /* coverity[overrun-buffer-val] */
793 lov_pool_del(obd, pool->pool_name);
795 lov_pool_hash_destroy(&lov->lov_pools_hash_body);
796 tgt_pool_free(&lov->lov_packed);
798 lprocfs_obd_cleanup(obd);
801 lov_tgts_getref(obd);
802 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
803 if (!lov->lov_tgts[i])
806 /* Inactive targets may never have connected */
807 if (lov->lov_tgts[i]->ltd_active)
808 /* We should never get here - these
809 * should have been removed in the
811 CERROR("%s: lov tgt %d not cleaned! "
812 "deathrow=%d, lovrc=%d\n",
813 obd->obd_name, i, lov->lov_death_row,
814 atomic_read(&lov->lov_refcount));
815 lov_del_target(obd, i, NULL, 0);
817 lov_tgts_putref(obd);
818 OBD_FREE_PTR_ARRAY(lov->lov_tgts, lov->lov_tgt_size);
819 lov->lov_tgt_size = 0;
822 if (lov->lov_cache != NULL) {
823 cl_cache_decref(lov->lov_cache);
824 lov->lov_cache = NULL;
830 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
831 u32 *indexp, int *genp)
833 struct obd_uuid obd_uuid;
838 switch (cmd = lcfg->lcfg_command) {
842 case LCFG_LOV_ADD_OBD:
843 case LCFG_LOV_ADD_INA:
844 case LCFG_LOV_DEL_OBD: {
848 /* lov_modify_tgts add 0:lov_mdsA 1:ost1_UUID 2:0 3:1 */
849 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
850 GOTO(out, rc = -EINVAL);
852 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
854 rc = kstrtou32(lustre_cfg_buf(lcfg, 2), 10, indexp);
857 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
862 if (cmd == LCFG_LOV_ADD_OBD)
863 rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
864 else if (cmd == LCFG_LOV_ADD_INA)
865 rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
867 rc = lov_del_target(obd, index, &obd_uuid, gen);
872 struct lov_desc *desc = &(obd->u.lov.desc);
876 GOTO(out, rc = -EINVAL);
878 count = class_modify_config(lcfg, PARAM_LOV,
879 &obd->obd_kset.kobj);
880 GOTO(out, rc = count < 0 ? count : 0);
889 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
890 GOTO(out, rc = -EINVAL);
898 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
899 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
901 struct obd_device *obd = class_exp2obd(exp);
902 struct lov_obd *lov = &obd->u.lov;
903 struct obd_info oinfo = {
907 struct ptlrpc_request_set *rqset;
908 struct lov_request_set *set = NULL;
909 struct lov_request *req;
915 rqset = ptlrpc_prep_set();
919 rc = lov_prep_statfs_set(obd, &oinfo, &set);
923 list_for_each_entry(req, &set->set_list, rq_link) {
924 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
925 &req->rq_oi, max_age, rqset);
930 rc = ptlrpc_set_wait(env, rqset);
934 atomic_set(&set->set_completes, 0);
936 rc2 = lov_fini_statfs_set(set);
941 ptlrpc_set_destroy(rqset);
946 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
947 void *karg, void __user *uarg)
949 struct obd_device *obd = class_exp2obd(exp);
950 struct lov_obd *lov = &obd->u.lov;
951 int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
955 case IOC_OBD_STATFS: {
956 struct obd_ioctl_data *data = karg;
957 struct obd_device *osc_obd;
958 struct obd_statfs stat_buf = {0};
959 struct obd_import *imp;
963 memcpy(&index, data->ioc_inlbuf2, sizeof(index));
967 if (!lov->lov_tgts[index])
968 /* Try again with the next index */
971 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
975 imp = osc_obd->u.cli.cl_import;
976 if (!lov->lov_tgts[index]->ltd_active &&
977 imp->imp_state != LUSTRE_IMP_IDLE)
981 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
982 min_t(unsigned long, data->ioc_plen2,
983 sizeof(struct obd_uuid))))
986 memcpy(&flags, data->ioc_inlbuf1, sizeof(flags));
987 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
989 /* got statfs data */
990 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
991 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
995 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
996 min_t(unsigned long, data->ioc_plen1,
997 sizeof(struct obd_statfs))))
1001 case OBD_IOC_QUOTACTL: {
1002 struct if_quotactl *qctl = karg;
1003 struct lov_tgt_desc *tgt = NULL;
1004 struct obd_quotactl *oqctl;
1006 if (qctl->qc_valid == QC_OSTIDX) {
1007 if (count <= qctl->qc_idx)
1010 tgt = lov->lov_tgts[qctl->qc_idx];
1011 if (!tgt || !tgt->ltd_exp)
1013 } else if (qctl->qc_valid == QC_UUID) {
1014 for (i = 0; i < count; i++) {
1015 tgt = lov->lov_tgts[i];
1017 !obd_uuid_equals(&tgt->ltd_uuid,
1021 if (tgt->ltd_exp == NULL)
1033 LASSERT(tgt && tgt->ltd_exp);
1034 OBD_ALLOC_PTR(oqctl);
1038 QCTL_COPY(oqctl, qctl);
1039 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1041 QCTL_COPY(qctl, oqctl);
1042 qctl->qc_valid = QC_OSTIDX;
1043 qctl->obd_uuid = tgt->ltd_uuid;
1045 OBD_FREE_PTR(oqctl);
1054 for (i = 0; i < count; i++) {
1056 struct obd_device *osc_obd;
1058 /* OST was disconnected */
1059 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1062 /* ll_umount_begin() sets force on lov, pass to osc */
1063 osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1065 osc_obd->obd_force = obd->obd_force;
1066 err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1069 if (lov->lov_tgts[i]->ltd_active) {
1070 CDEBUG_LIMIT(err == -ENOTTY ?
1071 D_IOCTL : D_WARNING,
1072 "iocontrol OSC %s on OST idx %d cmd %x: err = %d\n",
1073 lov_uuid2str(lov, i),
1090 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1091 __u32 keylen, void *key, __u32 *vallen, void *val)
1093 struct obd_device *obd = class_exp2obd(exp);
1094 struct lov_obd *lov = &obd->u.lov;
1095 struct lov_desc *ld = &lov->desc;
1099 if (vallen == NULL || val == NULL)
1102 lov_tgts_getref(obd);
1104 if (KEY_IS(KEY_MAX_EASIZE)) {
1105 *((u32 *)val) = exp->exp_connect_data.ocd_max_easize;
1106 } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
1107 u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
1108 LOV_MAX_STRIPE_COUNT);
1110 *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
1111 } else if (KEY_IS(KEY_TGT_COUNT)) {
1112 *((int *)val) = lov->desc.ld_tgt_count;
1117 lov_tgts_putref(obd);
1122 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
1123 __u32 keylen, void *key,
1124 __u32 vallen, void *val,
1125 struct ptlrpc_request_set *set)
1127 struct obd_device *obd = class_exp2obd(exp);
1128 struct lov_obd *lov = &obd->u.lov;
1129 struct lov_tgt_desc *tgt;
1130 bool do_inactive = false, no_set = false;
1139 set = ptlrpc_prep_set();
1144 lov_tgts_getref(obd);
1146 if (KEY_IS(KEY_CHECKSUM))
1149 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1150 tgt = lov->lov_tgts[i];
1152 /* OST was disconnected */
1153 if (tgt == NULL || tgt->ltd_exp == NULL)
1156 /* OST is inactive and we don't want inactive OSCs */
1157 if (!tgt->ltd_active && !do_inactive)
1160 err = obd_set_info_async(env, tgt->ltd_exp, keylen, key,
1167 /* cycle through MDC target for Data-on-MDT */
1168 for (i = 0; i < LOV_MDC_TGT_MAX; i++) {
1169 struct obd_device *mdc;
1171 mdc = lov->lov_mdc_tgts[i].lmtd_mdc;
1175 err = obd_set_info_async(env, mdc->obd_self_export,
1176 keylen, key, vallen, val, set);
1181 lov_tgts_putref(obd);
1183 err = ptlrpc_set_wait(env, set);
1186 ptlrpc_set_destroy(set);
1191 void lov_stripe_lock(struct lov_stripe_md *md)
1192 __acquires(&md->lsm_lock)
1194 LASSERT(md->lsm_lock_owner != current->pid);
1195 spin_lock(&md->lsm_lock);
1196 LASSERT(md->lsm_lock_owner == 0);
1197 md->lsm_lock_owner = current->pid;
1200 void lov_stripe_unlock(struct lov_stripe_md *md)
1201 __releases(&md->lsm_lock)
1203 LASSERT(md->lsm_lock_owner == current->pid);
1204 md->lsm_lock_owner = 0;
1205 spin_unlock(&md->lsm_lock);
1208 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
1209 struct obd_quotactl *oqctl)
1211 struct lov_obd *lov = &obd->u.lov;
1212 struct lov_tgt_desc *tgt;
1213 struct pool_desc *pool = NULL;
1215 __u64 bhardlimit = 0;
1219 if (oqctl->qc_cmd != Q_GETOQUOTA &&
1220 oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
1221 oqctl->qc_cmd != LUSTRE_Q_GETQUOTAPOOL) {
1223 CERROR("%s: bad quota opc %x for lov obd: rc = %d\n",
1224 obd->obd_name, oqctl->qc_cmd, rc);
1228 if (oqctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) {
1229 pool = lov_pool_find(obd, oqctl->qc_poolname);
1232 /* Set Q_GETOQUOTA back as targets report it's own
1233 * usage and doesn't care about pools */
1234 oqctl->qc_cmd = Q_GETOQUOTA;
1238 lov_tgts_getref(obd);
1239 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1242 tgt = lov->lov_tgts[i];
1248 tgt_check_index(tgt->ltd_index, &pool->pool_obds))
1251 if (!tgt->ltd_active || tgt->ltd_reap) {
1252 if (oqctl->qc_cmd == Q_GETOQUOTA &&
1253 lov->lov_tgts[i]->ltd_activate) {
1255 CERROR("%s: ost %d is inactive: rc = %d\n",
1256 obd->obd_name, i, rc);
1258 CDEBUG(D_HA, "ost %d is inactive\n", i);
1263 err = obd_quotactl(tgt->ltd_exp, oqctl);
1265 if (tgt->ltd_active && !rc)
1270 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1271 curspace += oqctl->qc_dqblk.dqb_curspace;
1272 bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
1275 lov_tgts_putref(obd);
1277 lov_pool_putref(pool);
1279 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1280 oqctl->qc_dqblk.dqb_curspace = curspace;
1281 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
1286 static const struct obd_ops lov_obd_ops = {
1287 .o_owner = THIS_MODULE,
1288 .o_setup = lov_setup,
1289 .o_cleanup = lov_cleanup,
1290 .o_connect = lov_connect,
1291 .o_disconnect = lov_disconnect,
1292 .o_statfs = lov_statfs,
1293 .o_iocontrol = lov_iocontrol,
1294 .o_get_info = lov_get_info,
1295 .o_set_info_async = lov_set_info_async,
1296 .o_notify = lov_notify,
1297 .o_pool_new = lov_pool_new,
1298 .o_pool_rem = lov_pool_remove,
1299 .o_pool_add = lov_pool_add,
1300 .o_pool_del = lov_pool_del,
1301 .o_quotactl = lov_quotactl,
1304 struct kmem_cache *lov_oinfo_slab;
1306 static int __init lov_init(void)
1311 /* print an address of _any_ initialized kernel symbol from this
1312 * module, to allow debugging with gdb that doesn't support data
1313 * symbols from modules.*/
1314 CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
1316 rc = lu_kmem_init(lov_caches);
1320 lov_oinfo_slab = kmem_cache_create("lov_oinfo",
1321 sizeof(struct lov_oinfo), 0,
1322 SLAB_HWCACHE_ALIGN, NULL);
1323 if (lov_oinfo_slab == NULL) {
1324 lu_kmem_fini(lov_caches);
1328 rc = class_register_type(&lov_obd_ops, NULL, true,
1329 LUSTRE_LOV_NAME, &lov_device_type);
1331 kmem_cache_destroy(lov_oinfo_slab);
1332 lu_kmem_fini(lov_caches);
1338 static void __exit lov_exit(void)
1340 class_unregister_type(LUSTRE_LOV_NAME);
1341 kmem_cache_destroy(lov_oinfo_slab);
1342 lu_kmem_fini(lov_caches);
1345 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1346 MODULE_DESCRIPTION("Lustre Logical Object Volume");
1347 MODULE_VERSION(LUSTRE_VERSION_STRING);
1348 MODULE_LICENSE("GPL");
1350 module_init(lov_init);
1351 module_exit(lov_exit);