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);
71 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
73 void lov_tgts_putref(struct obd_device *obd)
75 struct lov_obd *lov = &obd->u.lov;
77 mutex_lock(&lov->lov_lock);
78 /* ok to dec to 0 more than once -- ltd_exp's will be null */
79 if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
80 struct list_head kill = LIST_HEAD_INIT(kill);
81 struct lov_tgt_desc *tgt, *n;
84 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
86 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
87 tgt = lov->lov_tgts[i];
89 if (!tgt || !tgt->ltd_reap)
91 list_add(&tgt->ltd_kill, &kill);
92 /* XXX - right now there is a dependency on ld_tgt_count
93 * being the maximum tgt index for computing the
94 * mds_max_easize. So we can't shrink it. */
95 lov_ost_pool_remove(&lov->lov_packed, i);
96 lov->lov_tgts[i] = NULL;
99 mutex_unlock(&lov->lov_lock);
101 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
102 list_del(&tgt->ltd_kill);
104 __lov_del_obd(obd, tgt);
107 mutex_unlock(&lov->lov_lock);
111 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
112 enum obd_notify_event ev);
113 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
114 enum obd_notify_event ev);
116 int lov_connect_obd(struct obd_device *obd, u32 index, int activate,
117 struct obd_connect_data *data)
119 struct lov_obd *lov = &obd->u.lov;
120 struct obd_uuid *tgt_uuid;
121 struct obd_device *tgt_obd;
122 static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
123 struct obd_import *imp;
127 if (lov->lov_tgts[index] == NULL)
130 tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
131 tgt_obd = lov->lov_tgts[index]->ltd_obd;
133 if (!tgt_obd->obd_set_up) {
134 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
138 /* override the sp_me from lov */
139 tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
141 if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
142 data->ocd_index = index;
145 * Divine LOV knows that OBDs under it are OSCs.
147 imp = tgt_obd->u.cli.cl_import;
150 tgt_obd->obd_no_recov = 0;
151 /* FIXME this is probably supposed to be
152 ptlrpc_set_import_active. Horrible naming. */
153 ptlrpc_activate_import(imp);
156 rc = obd_register_observer(tgt_obd, obd);
158 CERROR("Target %s register_observer error %d\n",
159 obd_uuid2str(tgt_uuid), rc);
164 if (imp->imp_invalid) {
165 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
166 "disabled\n", obd_uuid2str(tgt_uuid));
170 rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
171 &lov_osc_uuid, data, NULL);
172 if (rc || !lov->lov_tgts[index]->ltd_exp) {
173 CERROR("Target %s connect error %d\n",
174 obd_uuid2str(tgt_uuid), rc);
178 lov->lov_tgts[index]->ltd_reap = 0;
180 CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
181 obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
183 if (lov->lov_tgts_kobj) {
184 /* Even if we failed, that's ok */
185 rc = sysfs_create_link(lov->lov_tgts_kobj,
186 &tgt_obd->obd_kset.kobj,
189 CERROR("%s: can't register LOV target /sys/fs/lustre/%s/%s/target_obds/%s : rc = %d\n",
190 obd->obd_name, obd->obd_type->typ_name,
192 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_name,
199 static int lov_connect(const struct lu_env *env,
200 struct obd_export **exp, struct obd_device *obd,
201 struct obd_uuid *cluuid, struct obd_connect_data *data,
204 struct lov_obd *lov = &obd->u.lov;
205 struct lov_tgt_desc *tgt;
206 struct lustre_handle conn;
210 CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
212 rc = class_connect(&conn, obd, cluuid);
216 *exp = class_conn2export(&conn);
218 /* Why should there ever be more than 1 connect? */
220 LASSERT(lov->lov_connects == 1);
222 memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
224 lov->lov_ocd = *data;
226 lov_tgts_getref(obd);
228 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
229 tgt = lov->lov_tgts[i];
230 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
232 /* Flags will be lowest common denominator */
233 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
235 CERROR("%s: lov connect tgt %d failed: %d\n",
236 obd->obd_name, i, rc);
239 /* connect to administrative disabled ost */
240 if (!lov->lov_tgts[i]->ltd_exp)
243 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
246 CERROR("%s error sending notify %d\n",
251 lov_tgts_putref(obd);
256 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
258 struct lov_obd *lov = &obd->u.lov;
259 struct obd_device *osc_obd;
263 osc_obd = class_exp2obd(tgt->ltd_exp);
264 CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
265 obd->obd_name, osc_obd->obd_name);
267 if (tgt->ltd_active) {
269 lov->desc.ld_active_tgt_count--;
270 tgt->ltd_exp->exp_obd->obd_inactive = 1;
274 if (lov->lov_tgts_kobj)
275 sysfs_remove_link(lov->lov_tgts_kobj,
278 /* Pass it on to our clients.
279 * XXX This should be an argument to disconnect,
280 * XXX not a back-door flag on the OBD. Ah well.
282 osc_obd->obd_force = obd->obd_force;
283 osc_obd->obd_fail = obd->obd_fail;
284 osc_obd->obd_no_recov = obd->obd_no_recov;
286 if (lov->targets_proc_entry != NULL)
287 lprocfs_remove_proc_entry(osc_obd->obd_name,
288 lov->targets_proc_entry);
291 obd_register_observer(osc_obd, NULL);
293 rc = obd_disconnect(tgt->ltd_exp);
295 CERROR("Target %s disconnect error %d\n",
296 tgt->ltd_uuid.uuid, rc);
304 static int lov_disconnect(struct obd_export *exp)
306 struct obd_device *obd = class_exp2obd(exp);
307 struct lov_obd *lov = &obd->u.lov;
315 /* Only disconnect the underlying layers on the final disconnect. */
317 if (lov->lov_connects != 0) {
318 /* why should there be more than 1 connect? */
319 CWARN("%s: unexpected disconnect #%d\n",
320 obd->obd_name, lov->lov_connects);
324 /* hold another ref so lov_del_obd() doesn't spin in putref each time */
325 lov_tgts_getref(obd);
327 for (index = 0; index < lov->desc.ld_tgt_count; index++) {
328 if (lov->lov_tgts[index] && lov->lov_tgts[index]->ltd_exp) {
329 /* Disconnection is the last we know about an OBD */
330 lov_del_target(obd, index, NULL,
331 lov->lov_tgts[index]->ltd_gen);
334 lov_tgts_putref(obd);
337 rc = class_disconnect(exp); /* bz 9811 */
343 * -EINVAL : UUID can't be found in the LOV's target list
344 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
345 * -EBADF : The UUID is found, but the OBD is the wrong type (!)
346 * any >= 0 : is log target index
348 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
349 enum obd_notify_event ev)
351 struct lov_obd *lov = &obd->u.lov;
352 struct lov_tgt_desc *tgt;
353 int index, activate, active;
356 CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
357 lov, uuid->uuid, ev);
359 lov_tgts_getref(obd);
360 for (index = 0; index < lov->desc.ld_tgt_count; index++) {
361 tgt = lov->lov_tgts[index];
364 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
368 if (index == lov->desc.ld_tgt_count)
369 GOTO(out, index = -EINVAL);
371 if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
372 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
375 * LU-642, initially inactive OSC could miss the obd_connect,
376 * we make up for it here.
378 if (activate && !tgt->ltd_exp) {
380 struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
382 rc = obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
383 &lov_osc_uuid, &lov->lov_ocd, NULL);
384 if (rc || tgt->ltd_exp == NULL)
385 GOTO(out, index = rc);
386 rc = obd_set_info_async(NULL, tgt->ltd_exp,
387 sizeof(KEY_CACHE_SET),
389 sizeof(struct cl_client_cache),
390 lov->lov_cache, NULL);
392 GOTO(out, index = rc);
395 if (lov->lov_tgts[index]->ltd_activate == activate) {
396 CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
397 uuid->uuid, activate ? "" : "de");
399 lov->lov_tgts[index]->ltd_activate = activate;
400 CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
401 activate ? "" : "de", obd_uuid2str(uuid));
404 } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
405 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
407 if (lov->lov_tgts[index]->ltd_active == active) {
408 CDEBUG(D_INFO, "OSC %s already %sactive!\n",
409 uuid->uuid, active ? "" : "in");
412 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
413 obd_uuid2str(uuid), active ? "" : "in");
416 lov->lov_tgts[index]->ltd_active = active;
418 lov->desc.ld_active_tgt_count++;
419 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
421 lov->desc.ld_active_tgt_count--;
422 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
425 CERROR("%s: unknown event %d for uuid %s\n", obd->obd_name,
430 CDEBUG(D_INFO, "%s: lov idx %d conn %llx\n", obd_uuid2str(uuid),
431 index, tgt->ltd_exp->exp_handle.h_cookie);
434 lov_tgts_putref(obd);
438 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
439 enum obd_notify_event ev)
442 struct lov_obd *lov = &obd->u.lov;
445 down_read(&lov->lov_notify_lock);
446 if (!lov->lov_connects)
447 GOTO(out_notify_lock, rc = 0);
449 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
450 ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
451 struct obd_uuid *uuid;
455 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
456 CERROR("unexpected notification of %s %s\n",
457 watched->obd_type->typ_name, watched->obd_name);
458 GOTO(out_notify_lock, rc = -EINVAL);
461 uuid = &watched->u.cli.cl_target_uuid;
463 /* Set OSC as active before notifying the observer, so the
464 * observer can use the OSC normally.
466 rc = lov_set_osc_active(obd, uuid, ev);
468 CERROR("%s: event %d failed: rc = %d\n", obd->obd_name,
470 GOTO(out_notify_lock, rc);
474 /* Pass the notification up the chain. */
475 rc = obd_notify_observer(obd, watched, ev);
478 up_read(&lov->lov_notify_lock);
483 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
484 u32 index, int gen, int active)
486 struct lov_obd *lov = &obd->u.lov;
487 struct lov_tgt_desc *tgt;
488 struct obd_device *tgt_obd;
492 CDEBUG(D_CONFIG, "uuid:%s idx:%u gen:%d active:%d\n",
493 uuidp->uuid, index, gen, active);
496 CERROR("%s: request to add '%s' with invalid generation: %d\n",
497 obd->obd_name, uuidp->uuid, gen);
501 tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME, &obd->obd_uuid);
505 mutex_lock(&lov->lov_lock);
507 if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
508 tgt = lov->lov_tgts[index];
510 CERROR("%s: UUID %s already assigned at index %d: rc = %d\n",
511 obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), index, rc);
512 mutex_unlock(&lov->lov_lock);
516 if (index >= lov->lov_tgt_size) {
517 /* We need to reallocate the lov target array. */
518 struct lov_tgt_desc **newtgts, **old = NULL;
519 __u32 newsize, oldsize = 0;
521 newsize = max(lov->lov_tgt_size, (__u32)2);
522 while (newsize < index + 1)
523 newsize = newsize << 1;
524 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
525 if (newtgts == NULL) {
526 mutex_unlock(&lov->lov_lock);
530 if (lov->lov_tgt_size) {
531 memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
534 oldsize = lov->lov_tgt_size;
537 lov->lov_tgts = newtgts;
538 lov->lov_tgt_size = newsize;
541 OBD_FREE(old, sizeof(*old) * oldsize);
543 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
544 lov->lov_tgts, lov->lov_tgt_size);
549 mutex_unlock(&lov->lov_lock);
553 rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
555 mutex_unlock(&lov->lov_lock);
560 tgt->ltd_uuid = *uuidp;
561 tgt->ltd_obd = tgt_obd;
562 /* XXX - add a sanity check on the generation number. */
564 tgt->ltd_index = index;
565 tgt->ltd_activate = active;
566 lov->lov_tgts[index] = tgt;
567 if (index >= lov->desc.ld_tgt_count)
568 lov->desc.ld_tgt_count = index + 1;
570 mutex_unlock(&lov->lov_lock);
572 CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
573 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
575 if (lov->lov_connects == 0) {
576 /* lov_connect hasn't been called yet. We'll do the
577 lov_connect_obd on this target when that fn first runs,
578 because we don't know the connect flags yet. */
582 lov_tgts_getref(obd);
584 rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
588 /* connect to administrative disabled ost */
592 if (lov->lov_cache != NULL) {
593 rc = obd_set_info_async(NULL, tgt->ltd_exp,
594 sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
595 sizeof(struct cl_client_cache), lov->lov_cache,
601 rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
602 active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE);
606 CERROR("%s: add failed, deleting %s: rc = %d\n",
607 obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), rc);
608 lov_del_target(obd, index, NULL, 0);
610 lov_tgts_putref(obd);
614 /* Schedule a target for deletion */
615 int lov_del_target(struct obd_device *obd, u32 index,
616 struct obd_uuid *uuidp, int gen)
618 struct lov_obd *lov = &obd->u.lov;
619 int count = lov->desc.ld_tgt_count;
623 if (index >= count) {
624 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
629 /* to make sure there's no ongoing lov_notify() now */
630 down_write(&lov->lov_notify_lock);
631 lov_tgts_getref(obd);
633 if (!lov->lov_tgts[index]) {
634 CERROR("LOV target at index %d is not setup.\n", index);
635 GOTO(out, rc = -EINVAL);
638 if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
639 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
640 lov_uuid2str(lov, index), index,
641 obd_uuid2str(uuidp));
642 GOTO(out, rc = -EINVAL);
645 CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
646 lov_uuid2str(lov, index), index,
647 lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
648 lov->lov_tgts[index]->ltd_active);
650 lov->lov_tgts[index]->ltd_reap = 1;
651 lov->lov_death_row++;
652 /* we really delete it from lov_tgts_putref() */
654 lov_tgts_putref(obd);
655 up_write(&lov->lov_notify_lock);
660 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
662 struct obd_device *osc_obd;
665 LASSERT(tgt->ltd_reap);
667 osc_obd = class_exp2obd(tgt->ltd_exp);
669 CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
671 osc_obd ? osc_obd->obd_name : "<no obd>");
674 lov_disconnect_obd(obd, tgt);
678 /* Manual cleanup - no cleanup logs to clean up the osc's. We must
679 do it ourselves. And we can't do it from lov_cleanup,
680 because we just lost our only reference to it. */
682 class_manual_cleanup(osc_obd);
685 void lov_fix_desc_stripe_size(__u64 *val)
687 if (*val < LOV_MIN_STRIPE_SIZE) {
689 LCONSOLE_INFO("Increasing default stripe size to "
691 LOV_DESC_STRIPE_SIZE_DEFAULT);
692 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
693 } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
694 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
695 LCONSOLE_WARN("Changing default stripe size to %llu (a "
697 *val, LOV_MIN_STRIPE_SIZE);
701 void lov_fix_desc_stripe_count(__u32 *val)
707 void lov_fix_desc_pattern(__u32 *val)
709 /* from lov_setstripe */
710 if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
711 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
716 void lov_fix_desc_qos_maxage(__u32 *val)
719 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
722 void lov_fix_desc(struct lov_desc *desc)
724 lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
725 lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
726 lov_fix_desc_pattern(&desc->ld_pattern);
727 lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
730 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
732 struct lov_desc *desc;
733 struct lov_obd *lov = &obd->u.lov;
737 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
738 CERROR("LOV setup requires a descriptor\n");
742 desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
744 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
745 CERROR("descriptor size wrong: %d > %d\n",
746 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
750 if (desc->ld_magic != LOV_DESC_MAGIC) {
751 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
752 CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
753 obd->obd_name, desc);
754 lustre_swab_lov_desc(desc);
756 CERROR("%s: Bad lov desc magic: %#x\n",
757 obd->obd_name, desc->ld_magic);
764 desc->ld_active_tgt_count = 0;
766 lov->lov_tgt_size = 0;
768 mutex_init(&lov->lov_lock);
769 atomic_set(&lov->lov_refcount, 0);
770 lov->lov_sp_me = LUSTRE_SP_CLI;
772 init_rwsem(&lov->lov_notify_lock);
774 lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
776 HASH_POOLS_BKT_BITS, 0,
779 &pool_hash_operations,
781 INIT_LIST_HEAD(&lov->lov_pool_list);
782 lov->lov_pool_count = 0;
783 rc = lov_ost_pool_init(&lov->lov_packed, 0);
787 rc = lov_tunables_init(obd);
791 lov->lov_tgts_kobj = kobject_create_and_add("target_obds",
792 &obd->obd_kset.kobj);
798 static int lov_cleanup(struct obd_device *obd)
800 struct lov_obd *lov = &obd->u.lov;
801 struct list_head *pos, *tmp;
802 struct pool_desc *pool;
805 if (lov->lov_tgts_kobj) {
806 kobject_put(lov->lov_tgts_kobj);
807 lov->lov_tgts_kobj = NULL;
810 list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
811 pool = list_entry(pos, struct pool_desc, pool_list);
812 /* free pool structs */
813 CDEBUG(D_INFO, "delete pool %p\n", pool);
814 /* In the function below, .hs_keycmp resolves to
815 * pool_hashkey_keycmp() */
816 /* coverity[overrun-buffer-val] */
817 lov_pool_del(obd, pool->pool_name);
819 cfs_hash_putref(lov->lov_pools_hash_body);
820 lov_ost_pool_free(&lov->lov_packed);
822 lprocfs_obd_cleanup(obd);
825 lov_tgts_getref(obd);
826 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
827 if (!lov->lov_tgts[i])
830 /* Inactive targets may never have connected */
831 if (lov->lov_tgts[i]->ltd_active ||
832 atomic_read(&lov->lov_refcount))
833 /* We should never get here - these
834 * should have been removed in the
836 CERROR("%s: lov tgt %d not cleaned! "
837 "deathrow=%d, lovrc=%d\n",
838 obd->obd_name, i, lov->lov_death_row,
839 atomic_read(&lov->lov_refcount));
840 lov_del_target(obd, i, NULL, 0);
842 lov_tgts_putref(obd);
843 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
845 lov->lov_tgt_size = 0;
848 if (lov->lov_cache != NULL) {
849 cl_cache_decref(lov->lov_cache);
850 lov->lov_cache = NULL;
856 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
857 u32 *indexp, int *genp)
859 struct obd_uuid obd_uuid;
864 switch (cmd = lcfg->lcfg_command) {
868 case LCFG_LOV_ADD_OBD:
869 case LCFG_LOV_ADD_INA:
870 case LCFG_LOV_DEL_OBD: {
874 /* lov_modify_tgts add 0:lov_mdsA 1:ost1_UUID 2:0 3:1 */
875 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
876 GOTO(out, rc = -EINVAL);
878 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
880 rc = kstrtou32(lustre_cfg_buf(lcfg, 2), 10, indexp);
883 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
888 if (cmd == LCFG_LOV_ADD_OBD)
889 rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
890 else if (cmd == LCFG_LOV_ADD_INA)
891 rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
893 rc = lov_del_target(obd, index, &obd_uuid, gen);
898 struct lov_desc *desc = &(obd->u.lov.desc);
902 GOTO(out, rc = -EINVAL);
904 count = class_modify_config(lcfg, PARAM_LOV,
905 &obd->obd_kset.kobj);
906 GOTO(out, rc = count < 0 ? count : 0);
915 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
916 GOTO(out, rc = -EINVAL);
924 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
925 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
927 struct obd_device *obd = class_exp2obd(exp);
928 struct lov_obd *lov = &obd->u.lov;
929 struct obd_info oinfo = {
933 struct ptlrpc_request_set *rqset;
934 struct lov_request_set *set = NULL;
935 struct lov_request *req;
941 rqset = ptlrpc_prep_set();
945 rc = lov_prep_statfs_set(obd, &oinfo, &set);
949 list_for_each_entry(req, &set->set_list, rq_link) {
950 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
951 &req->rq_oi, max_age, rqset);
956 rc = ptlrpc_set_wait(env, rqset);
960 atomic_set(&set->set_completes, 0);
962 rc2 = lov_fini_statfs_set(set);
967 ptlrpc_set_destroy(rqset);
972 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
973 void *karg, void __user *uarg)
975 struct obd_device *obd = class_exp2obd(exp);
976 struct lov_obd *lov = &obd->u.lov;
977 int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
978 struct obd_uuid *uuidp;
982 case IOC_OBD_STATFS: {
983 struct obd_ioctl_data *data = karg;
984 struct obd_device *osc_obd;
985 struct obd_statfs stat_buf = {0};
986 struct obd_import *imp;
990 memcpy(&index, data->ioc_inlbuf2, sizeof(index));
994 if (!lov->lov_tgts[index])
995 /* Try again with the next index */
998 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1002 imp = osc_obd->u.cli.cl_import;
1003 if (!lov->lov_tgts[index]->ltd_active &&
1004 imp->imp_state != LUSTRE_IMP_IDLE)
1008 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1009 min_t(unsigned long, data->ioc_plen2,
1010 sizeof(struct obd_uuid))))
1013 memcpy(&flags, data->ioc_inlbuf1, sizeof(flags));
1014 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
1016 /* got statfs data */
1017 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1018 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
1022 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1023 min_t(unsigned long, data->ioc_plen1,
1024 sizeof(struct obd_statfs))))
1028 case OBD_IOC_LOV_GET_CONFIG: {
1029 struct obd_ioctl_data *data;
1030 struct lov_desc *desc;
1035 if (obd_ioctl_getdata(&buf, &len, uarg))
1038 data = (struct obd_ioctl_data *)buf;
1040 if (sizeof(*desc) > data->ioc_inllen1) {
1041 OBD_FREE_LARGE(buf, len);
1045 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1046 OBD_FREE_LARGE(buf, len);
1050 if (sizeof(__u32) * count > data->ioc_inllen3) {
1051 OBD_FREE_LARGE(buf, len);
1055 desc = (struct lov_desc *)data->ioc_inlbuf1;
1056 memcpy(desc, &(lov->desc), sizeof(*desc));
1058 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1059 genp = (__u32 *)data->ioc_inlbuf3;
1060 /* the uuid will be empty for deleted OSTs */
1061 for (i = 0; i < count; i++, uuidp++, genp++) {
1062 if (!lov->lov_tgts[i])
1064 *uuidp = lov->lov_tgts[i]->ltd_uuid;
1065 *genp = lov->lov_tgts[i]->ltd_gen;
1068 if (copy_to_user(uarg, buf, len))
1070 OBD_FREE_LARGE(buf, len);
1073 case OBD_IOC_QUOTACTL: {
1074 struct if_quotactl *qctl = karg;
1075 struct lov_tgt_desc *tgt = NULL;
1076 struct obd_quotactl *oqctl;
1078 if (qctl->qc_valid == QC_OSTIDX) {
1079 if (count <= qctl->qc_idx)
1082 tgt = lov->lov_tgts[qctl->qc_idx];
1083 if (!tgt || !tgt->ltd_exp)
1085 } else if (qctl->qc_valid == QC_UUID) {
1086 for (i = 0; i < count; i++) {
1087 tgt = lov->lov_tgts[i];
1089 !obd_uuid_equals(&tgt->ltd_uuid,
1093 if (tgt->ltd_exp == NULL)
1105 LASSERT(tgt && tgt->ltd_exp);
1106 OBD_ALLOC_PTR(oqctl);
1110 QCTL_COPY(oqctl, qctl);
1111 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1113 QCTL_COPY(qctl, oqctl);
1114 qctl->qc_valid = QC_OSTIDX;
1115 qctl->obd_uuid = tgt->ltd_uuid;
1117 OBD_FREE_PTR(oqctl);
1126 for (i = 0; i < count; i++) {
1128 struct obd_device *osc_obd;
1130 /* OST was disconnected */
1131 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1134 /* ll_umount_begin() sets force on lov, pass to osc */
1135 osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1136 osc_obd->obd_force = obd->obd_force;
1137 err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1140 if (lov->lov_tgts[i]->ltd_active) {
1141 CDEBUG(err == -ENOTTY ?
1142 D_IOCTL : D_WARNING,
1143 "iocontrol OSC %s on OST "
1144 "idx %d cmd %x: err = %d\n",
1145 lov_uuid2str(lov, i),
1162 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1163 __u32 keylen, void *key, __u32 *vallen, void *val)
1165 struct obd_device *obddev = class_exp2obd(exp);
1166 struct lov_obd *lov = &obddev->u.lov;
1167 struct lov_desc *ld = &lov->desc;
1171 if (vallen == NULL || val == NULL)
1174 lov_tgts_getref(obddev);
1176 if (KEY_IS(KEY_MAX_EASIZE)) {
1177 u32 max_stripe_count = min_t(u32, ld->ld_active_tgt_count,
1178 LOV_MAX_STRIPE_COUNT);
1180 *((u32 *)val) = lov_mds_md_size(max_stripe_count, LOV_MAGIC_V3);
1181 } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
1182 u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
1183 LOV_MAX_STRIPE_COUNT);
1185 *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
1186 } else if (KEY_IS(KEY_TGT_COUNT)) {
1187 *((int *)val) = lov->desc.ld_tgt_count;
1192 lov_tgts_putref(obddev);
1197 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
1198 __u32 keylen, void *key,
1199 __u32 vallen, void *val,
1200 struct ptlrpc_request_set *set)
1202 struct obd_device *obddev = class_exp2obd(exp);
1203 struct lov_obd *lov = &obddev->u.lov;
1204 struct lov_tgt_desc *tgt;
1205 bool do_inactive = false, no_set = false;
1214 set = ptlrpc_prep_set();
1219 lov_tgts_getref(obddev);
1221 if (KEY_IS(KEY_CHECKSUM)) {
1223 } else if (KEY_IS(KEY_CACHE_SET)) {
1224 LASSERT(lov->lov_cache == NULL);
1225 lov->lov_cache = val;
1227 cl_cache_incref(lov->lov_cache);
1230 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1231 tgt = lov->lov_tgts[i];
1233 /* OST was disconnected */
1234 if (tgt == NULL || tgt->ltd_exp == NULL)
1237 /* OST is inactive and we don't want inactive OSCs */
1238 if (!tgt->ltd_active && !do_inactive)
1241 err = obd_set_info_async(env, tgt->ltd_exp, keylen, key,
1248 /* cycle through MDC target for Data-on-MDT */
1249 for (i = 0; i < LOV_MDC_TGT_MAX; i++) {
1250 struct obd_device *mdc;
1252 mdc = lov->lov_mdc_tgts[i].lmtd_mdc;
1256 err = obd_set_info_async(env, mdc->obd_self_export,
1257 keylen, key, vallen, val, set);
1262 lov_tgts_putref(obddev);
1264 err = ptlrpc_set_wait(env, set);
1267 ptlrpc_set_destroy(set);
1272 void lov_stripe_lock(struct lov_stripe_md *md)
1273 __acquires(&md->lsm_lock)
1275 LASSERT(md->lsm_lock_owner != current_pid());
1276 spin_lock(&md->lsm_lock);
1277 LASSERT(md->lsm_lock_owner == 0);
1278 md->lsm_lock_owner = current_pid();
1281 void lov_stripe_unlock(struct lov_stripe_md *md)
1282 __releases(&md->lsm_lock)
1284 LASSERT(md->lsm_lock_owner == current_pid());
1285 md->lsm_lock_owner = 0;
1286 spin_unlock(&md->lsm_lock);
1289 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
1290 struct obd_quotactl *oqctl)
1292 struct lov_obd *lov = &obd->u.lov;
1293 struct lov_tgt_desc *tgt;
1295 __u64 bhardlimit = 0;
1299 if (oqctl->qc_cmd != Q_GETOQUOTA &&
1300 oqctl->qc_cmd != LUSTRE_Q_SETQUOTA) {
1301 CERROR("%s: bad quota opc %x for lov obd\n",
1302 obd->obd_name, oqctl->qc_cmd);
1307 lov_tgts_getref(obd);
1308 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1311 tgt = lov->lov_tgts[i];
1316 if (!tgt->ltd_active || tgt->ltd_reap) {
1317 if (oqctl->qc_cmd == Q_GETOQUOTA &&
1318 lov->lov_tgts[i]->ltd_activate) {
1320 CERROR("ost %d is inactive\n", i);
1322 CDEBUG(D_HA, "ost %d is inactive\n", i);
1327 err = obd_quotactl(tgt->ltd_exp, oqctl);
1329 if (tgt->ltd_active && !rc)
1334 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1335 curspace += oqctl->qc_dqblk.dqb_curspace;
1336 bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
1339 lov_tgts_putref(obd);
1341 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1342 oqctl->qc_dqblk.dqb_curspace = curspace;
1343 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
1348 static struct obd_ops lov_obd_ops = {
1349 .o_owner = THIS_MODULE,
1350 .o_setup = lov_setup,
1351 .o_cleanup = lov_cleanup,
1352 .o_connect = lov_connect,
1353 .o_disconnect = lov_disconnect,
1354 .o_statfs = lov_statfs,
1355 .o_iocontrol = lov_iocontrol,
1356 .o_get_info = lov_get_info,
1357 .o_set_info_async = lov_set_info_async,
1358 .o_notify = lov_notify,
1359 .o_pool_new = lov_pool_new,
1360 .o_pool_rem = lov_pool_remove,
1361 .o_pool_add = lov_pool_add,
1362 .o_pool_del = lov_pool_del,
1363 .o_quotactl = lov_quotactl,
1366 struct kmem_cache *lov_oinfo_slab;
1368 static int __init lov_init(void)
1370 bool enable_proc = true;
1371 struct obd_type *type;
1375 /* print an address of _any_ initialized kernel symbol from this
1376 * module, to allow debugging with gdb that doesn't support data
1377 * symbols from modules.*/
1378 CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
1380 rc = lu_kmem_init(lov_caches);
1384 lov_oinfo_slab = kmem_cache_create("lov_oinfo",
1385 sizeof(struct lov_oinfo), 0,
1386 SLAB_HWCACHE_ALIGN, NULL);
1387 if (lov_oinfo_slab == NULL) {
1388 lu_kmem_fini(lov_caches);
1392 type = class_search_type(LUSTRE_LOD_NAME);
1393 if (type != NULL && type->typ_procsym != NULL)
1394 enable_proc = false;
1396 rc = class_register_type(&lov_obd_ops, NULL, enable_proc, NULL,
1397 LUSTRE_LOV_NAME, &lov_device_type);
1400 kmem_cache_destroy(lov_oinfo_slab);
1401 lu_kmem_fini(lov_caches);
1407 static void __exit lov_exit(void)
1409 class_unregister_type(LUSTRE_LOV_NAME);
1410 kmem_cache_destroy(lov_oinfo_slab);
1411 lu_kmem_fini(lov_caches);
1414 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1415 MODULE_DESCRIPTION("Lustre Logical Object Volume");
1416 MODULE_VERSION(LUSTRE_VERSION_STRING);
1417 MODULE_LICENSE("GPL");
1419 module_init(lov_init);
1420 module_exit(lov_exit);