1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
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>
45 # define EXPORT_SYMTAB
47 #define DEBUG_SUBSYSTEM S_LOV
49 #include <libcfs/libcfs.h>
51 #include <liblustre.h>
54 #include <obd_support.h>
55 #include <lustre_lib.h>
56 #include <lustre_net.h>
57 #include <lustre/lustre_idl.h>
58 #include <lustre_dlm.h>
59 #include <lustre_mds.h>
60 #include <lustre_debug.h>
61 #include <obd_class.h>
64 #include <lprocfs_status.h>
65 #include <lustre_param.h>
66 #include <cl_object.h>
67 #include <lustre/ll_fiemap.h>
69 #include "lov_internal.h"
72 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
73 Any function that expects lov_tgts to remain stationary must take a ref. */
74 void lov_getref(struct obd_device *obd)
76 struct lov_obd *lov = &obd->u.lov;
78 /* nobody gets through here until lov_putref is done */
79 mutex_down(&lov->lov_lock);
80 atomic_inc(&lov->lov_refcount);
81 mutex_up(&lov->lov_lock);
85 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
87 void lov_putref(struct obd_device *obd)
89 struct lov_obd *lov = &obd->u.lov;
91 mutex_down(&lov->lov_lock);
92 /* ok to dec to 0 more than once -- ltd_exp's will be null */
93 if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
96 struct lov_tgt_desc *tgt, *n;
97 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
99 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
100 tgt = lov->lov_tgts[i];
102 if (!tgt || !tgt->ltd_reap)
104 list_add(&tgt->ltd_kill, &kill);
105 /* XXX - right now there is a dependency on ld_tgt_count
106 * being the maximum tgt index for computing the
107 * mds_max_easize. So we can't shrink it. */
108 lov_ost_pool_remove(&lov->lov_packed, i);
109 lov->lov_tgts[i] = NULL;
110 lov->lov_death_row--;
112 mutex_up(&lov->lov_lock);
114 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
115 list_del(&tgt->ltd_kill);
117 __lov_del_obd(obd, tgt);
120 mutex_up(&lov->lov_lock);
124 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
126 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
127 enum obd_notify_event ev, void *data);
130 #define MAX_STRING_SIZE 128
131 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
132 struct obd_connect_data *data)
134 struct lov_obd *lov = &obd->u.lov;
135 struct obd_uuid tgt_uuid;
136 struct obd_device *tgt_obd;
137 struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
138 struct obd_import *imp;
141 cfs_proc_dir_entry_t *lov_proc_dir;
146 if (!lov->lov_tgts[index])
149 tgt_uuid = lov->lov_tgts[index]->ltd_uuid;
151 tgt_obd = class_find_client_obd(&tgt_uuid, LUSTRE_OSC_NAME,
155 CERROR("Target %s not attached\n", obd_uuid2str(&tgt_uuid));
158 if (!tgt_obd->obd_set_up) {
159 CERROR("Target %s not set up\n", obd_uuid2str(&tgt_uuid));
163 /* override the sp_me from lov */
164 tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
166 if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
167 data->ocd_index = index;
170 * Divine LOV knows that OBDs under it are OSCs.
172 imp = tgt_obd->u.cli.cl_import;
175 tgt_obd->obd_no_recov = 0;
176 /* FIXME this is probably supposed to be
177 ptlrpc_set_import_active. Horrible naming. */
178 ptlrpc_activate_import(imp);
181 rc = obd_register_observer(tgt_obd, obd);
183 CERROR("Target %s register_observer error %d\n",
184 obd_uuid2str(&tgt_uuid), rc);
189 if (imp->imp_invalid) {
190 CERROR("not connecting OSC %s; administratively "
191 "disabled\n", obd_uuid2str(&tgt_uuid));
195 rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
196 &lov_osc_uuid, data, NULL);
197 if (rc || !lov->lov_tgts[index]->ltd_exp) {
198 CERROR("Target %s connect error %d\n",
199 obd_uuid2str(&tgt_uuid), rc);
203 lov->lov_tgts[index]->ltd_reap = 0;
205 lov->lov_tgts[index]->ltd_active = 1;
206 lov->desc.ld_active_tgt_count++;
207 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
209 CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
210 obd_uuid2str(&tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
213 lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
215 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
216 cfs_proc_dir_entry_t *osc_symlink;
217 char name[MAX_STRING_SIZE];
219 LASSERT(osc_obd != NULL);
220 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
221 LASSERT(osc_obd->obd_type->typ_name != NULL);
222 snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
223 osc_obd->obd_type->typ_name,
225 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name, lov_proc_dir,
227 if (osc_symlink == NULL) {
228 CERROR("could not register LOV target "
229 "/proc/fs/lustre/%s/%s/target_obds/%s.",
230 obd->obd_type->typ_name, obd->obd_name,
232 lprocfs_remove(&lov_proc_dir);
237 rc = qos_add_tgt(obd, index);
239 CERROR("qos_add_tgt failed %d\n", rc);
244 static int lov_connect(const struct lu_env *env,
245 struct obd_export **exp, struct obd_device *obd,
246 struct obd_uuid *cluuid, struct obd_connect_data *data,
249 struct lov_obd *lov = &obd->u.lov;
250 struct lov_tgt_desc *tgt;
251 struct lustre_handle conn;
255 CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
257 rc = class_connect(&conn, obd, cluuid);
261 *exp = class_conn2export(&conn);
263 /* Why should there ever be more than 1 connect? */
265 LASSERT(lov->lov_connects == 1);
267 memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
269 lov->lov_ocd = *data;
272 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
273 tgt = lov->lov_tgts[i];
274 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
276 /* Flags will be lowest common denominator */
277 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
279 CERROR("%s: lov connect tgt %d failed: %d\n",
280 obd->obd_name, i, rc);
283 /* connect to administrative disabled ost */
284 if (!lov->lov_tgts[i]->ltd_exp)
287 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
288 OBD_NOTIFY_CONNECT, (void *)&i);
290 CERROR("%s error sending notify %d\n",
299 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
301 cfs_proc_dir_entry_t *lov_proc_dir;
302 struct lov_obd *lov = &obd->u.lov;
303 struct obd_device *osc_obd;
307 osc_obd = class_exp2obd(tgt->ltd_exp);
308 CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
309 obd->obd_name, osc_obd->obd_name);
311 if (tgt->ltd_active) {
313 lov->desc.ld_active_tgt_count--;
314 tgt->ltd_exp->exp_obd->obd_inactive = 1;
317 lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
319 cfs_proc_dir_entry_t *osc_symlink;
321 osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name);
323 lprocfs_remove(&osc_symlink);
325 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing.",
326 obd->obd_type->typ_name, obd->obd_name,
332 /* Pass it on to our clients.
333 * XXX This should be an argument to disconnect,
334 * XXX not a back-door flag on the OBD. Ah well.
336 osc_obd->obd_force = obd->obd_force;
337 osc_obd->obd_fail = obd->obd_fail;
338 osc_obd->obd_no_recov = obd->obd_no_recov;
341 obd_register_observer(osc_obd, NULL);
343 rc = obd_disconnect(tgt->ltd_exp);
345 CERROR("Target %s disconnect error %d\n",
346 tgt->ltd_uuid.uuid, rc);
350 qos_del_tgt(obd, tgt);
356 static int lov_disconnect(struct obd_export *exp)
358 struct obd_device *obd = class_exp2obd(exp);
359 struct lov_obd *lov = &obd->u.lov;
366 /* Only disconnect the underlying layers on the final disconnect. */
368 if (lov->lov_connects != 0) {
369 /* why should there be more than 1 connect? */
370 CERROR("disconnect #%d\n", lov->lov_connects);
374 /* Let's hold another reference so lov_del_obd doesn't spin through
378 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
379 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
380 /* Disconnection is the last we know about an obd */
381 lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
387 rc = class_disconnect(exp); /* bz 9811 */
393 * -EINVAL : UUID can't be found in the LOV's target list
394 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
395 * -EBADF : The UUID is found, but the OBD is the wrong type (!)
396 * any >= 0 : is log target index
398 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
401 struct lov_obd *lov = &obd->u.lov;
402 struct lov_tgt_desc *tgt;
406 CDEBUG(D_INFO, "Searching in lov %p for uuid %s (activate=%d)\n",
407 lov, uuid->uuid, activate);
410 for (index = 0; index < lov->desc.ld_tgt_count; index++) {
411 tgt = lov->lov_tgts[index];
412 if (!tgt || !tgt->ltd_exp)
415 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
416 index, obd_uuid2str(&tgt->ltd_uuid),
417 tgt->ltd_exp->exp_handle.h_cookie);
418 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
422 if (index == lov->desc.ld_tgt_count)
423 GOTO(out, index = -EINVAL);
425 if (lov->lov_tgts[index]->ltd_active == activate) {
426 CDEBUG(D_INFO, "OSC %s already %sactive!\n", uuid->uuid,
427 activate ? "" : "in");
431 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n", obd_uuid2str(uuid),
432 activate ? "" : "in");
434 lov->lov_tgts[index]->ltd_active = activate;
437 lov->desc.ld_active_tgt_count++;
438 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
440 lov->desc.ld_active_tgt_count--;
441 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
443 /* remove any old qos penalty */
444 lov->lov_tgts[index]->ltd_qos.ltq_penalty = 0;
451 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
452 enum obd_notify_event ev, void *data)
457 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
458 struct obd_uuid *uuid;
462 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
463 CERROR("unexpected notification of %s %s!\n",
464 watched->obd_type->typ_name,
468 uuid = &watched->u.cli.cl_target_uuid;
470 /* Set OSC as active before notifying the observer, so the
471 * observer can use the OSC normally.
473 rc = lov_set_osc_active(obd, uuid, ev == OBD_NOTIFY_ACTIVE);
475 CERROR("%sactivation of %s failed: %d\n",
476 (ev == OBD_NOTIFY_ACTIVE) ? "" : "de",
477 obd_uuid2str(uuid), rc);
480 /* active event should be pass lov target index as data */
484 /* Pass the notification up the chain. */
486 rc = obd_notify_observer(obd, watched, ev, data);
488 /* NULL watched means all osc's in the lov (only for syncs) */
489 /* sync event should be send lov idx as data */
490 struct lov_obd *lov = &obd->u.lov;
491 struct obd_device *tgt_obd;
494 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
495 if (!lov->lov_tgts[i])
498 if ((ev == OBD_NOTIFY_SYNC) ||
499 (ev == OBD_NOTIFY_SYNC_NONBLOCK))
502 tgt_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
504 rc = obd_notify_observer(obd, tgt_obd, ev, data);
506 CERROR("%s: notify %s of %s failed %d\n",
508 obd->obd_observer->obd_name,
509 tgt_obd->obd_name, rc);
519 int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
520 __u32 index, int gen, int active)
522 struct lov_obd *lov = &obd->u.lov;
523 struct lov_tgt_desc *tgt;
527 CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
528 uuidp->uuid, index, gen, active);
531 CERROR("request to add OBD %s with invalid generation: %d\n",
536 mutex_down(&lov->lov_lock);
538 if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
539 tgt = lov->lov_tgts[index];
540 CERROR("UUID %s already assigned at LOV target index %d\n",
541 obd_uuid2str(&tgt->ltd_uuid), index);
542 mutex_up(&lov->lov_lock);
546 if (index >= lov->lov_tgt_size) {
547 /* We need to reallocate the lov target array. */
548 struct lov_tgt_desc **newtgts, **old = NULL;
549 __u32 newsize, oldsize = 0;
551 newsize = max(lov->lov_tgt_size, (__u32)2);
552 while (newsize < index + 1)
553 newsize = newsize << 1;
554 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
555 if (newtgts == NULL) {
556 mutex_up(&lov->lov_lock);
560 if (lov->lov_tgt_size) {
561 memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
564 oldsize = lov->lov_tgt_size;
567 lov->lov_tgts = newtgts;
568 lov->lov_tgt_size = newsize;
573 OBD_FREE(old, sizeof(*old) * oldsize);
575 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
576 lov->lov_tgts, lov->lov_tgt_size);
581 mutex_up(&lov->lov_lock);
585 memset(tgt, 0, sizeof(*tgt));
586 tgt->ltd_uuid = *uuidp;
587 /* XXX - add a sanity check on the generation number. */
589 tgt->ltd_index = index;
590 tgt->ltd_activate = active;
591 lov->lov_tgts[index] = tgt;
592 if (index >= lov->desc.ld_tgt_count)
593 lov->desc.ld_tgt_count = index + 1;
595 rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
599 mutex_up(&lov->lov_lock);
601 CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
602 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
604 if (lov->lov_connects == 0) {
605 /* lov_connect hasn't been called yet. We'll do the
606 lov_connect_obd on this target when that fn first runs,
607 because we don't know the connect flags yet. */
613 rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
617 /* connect to administrative disabled ost */
621 rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
622 active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
627 CERROR("add failed (%d), deleting %s\n", rc,
628 obd_uuid2str(&tgt->ltd_uuid));
629 lov_del_target(obd, index, 0, 0);
635 /* Schedule a target for deletion */
636 int lov_del_target(struct obd_device *obd, __u32 index,
637 struct obd_uuid *uuidp, int gen)
639 struct lov_obd *lov = &obd->u.lov;
640 int count = lov->desc.ld_tgt_count;
644 if (index >= count) {
645 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
652 if (!lov->lov_tgts[index]) {
653 CERROR("LOV target at index %d is not setup.\n", index);
654 GOTO(out, rc = -EINVAL);
657 if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
658 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
659 lov_uuid2str(lov, index), index,
660 obd_uuid2str(uuidp));
661 GOTO(out, rc = -EINVAL);
664 CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
665 lov_uuid2str(lov, index), index,
666 lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
667 lov->lov_tgts[index]->ltd_active);
669 lov->lov_tgts[index]->ltd_reap = 1;
670 lov->lov_death_row++;
671 /* we really delete it from lov_putref */
678 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
680 struct obd_device *osc_obd;
683 LASSERT(tgt->ltd_reap);
685 osc_obd = class_exp2obd(tgt->ltd_exp);
687 CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
689 osc_obd ? osc_obd->obd_name : "<no obd>");
692 lov_disconnect_obd(obd, tgt);
696 /* Manual cleanup - no cleanup logs to clean up the osc's. We must
697 do it ourselves. And we can't do it from lov_cleanup,
698 because we just lost our only reference to it. */
700 class_manual_cleanup(osc_obd);
703 void lov_fix_desc_stripe_size(__u64 *val)
705 if (*val < PTLRPC_MAX_BRW_SIZE) {
706 LCONSOLE_WARN("Increasing default stripe size to min %u\n",
707 PTLRPC_MAX_BRW_SIZE);
708 *val = PTLRPC_MAX_BRW_SIZE;
709 } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
710 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
711 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
713 *val, LOV_MIN_STRIPE_SIZE);
717 void lov_fix_desc_stripe_count(__u32 *val)
723 void lov_fix_desc_pattern(__u32 *val)
725 /* from lov_setstripe */
726 if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
727 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
732 void lov_fix_desc_qos_maxage(__u32 *val)
736 *val = QOS_DEFAULT_MAXAGE;
739 void lov_fix_desc(struct lov_desc *desc)
741 lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
742 lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
743 lov_fix_desc_pattern(&desc->ld_pattern);
744 lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
747 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
749 struct lprocfs_static_vars lvars = { 0 };
750 struct lov_desc *desc;
751 struct lov_obd *lov = &obd->u.lov;
756 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
757 CERROR("LOV setup requires a descriptor\n");
761 desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
763 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
764 CERROR("descriptor size wrong: %d > %d\n",
765 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
769 if (desc->ld_magic != LOV_DESC_MAGIC) {
770 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
771 CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
772 obd->obd_name, desc);
773 lustre_swab_lov_desc(desc);
775 CERROR("%s: Bad lov desc magic: %#x\n",
776 obd->obd_name, desc->ld_magic);
783 /* Because of 64-bit divide/mod operations only work with a 32-bit
784 * divisor in a 32-bit kernel, we cannot support a stripe width
785 * of 4GB or larger on 32-bit CPUs. */
786 count = desc->ld_default_stripe_count;
787 if ((count > 0 ? count : desc->ld_tgt_count) *
788 desc->ld_default_stripe_size > 0xffffffff) {
789 CERROR("LOV: stripe width "LPU64"x%u > 4294967295 bytes\n",
790 desc->ld_default_stripe_size, count);
794 desc->ld_active_tgt_count = 0;
796 lov->lov_tgt_size = 0;
798 sema_init(&lov->lov_lock, 1);
799 atomic_set(&lov->lov_refcount, 0);
800 CFS_INIT_LIST_HEAD(&lov->lov_qos.lq_oss_list);
801 init_rwsem(&lov->lov_qos.lq_rw_sem);
802 lov->lov_sp_me = LUSTRE_SP_CLI;
803 lov->lov_qos.lq_dirty = 1;
804 lov->lov_qos.lq_rr.lqr_dirty = 1;
805 lov->lov_qos.lq_reset = 1;
806 /* Default priority is toward free space balance */
807 lov->lov_qos.lq_prio_free = 232;
809 lov->lov_pools_hash_body = lustre_hash_init("POOLS", 7, 7,
810 &pool_hash_operations, 0);
811 CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
812 lov->lov_pool_count = 0;
813 rc = lov_ost_pool_init(&lov->lov_packed, 0);
816 rc = lov_ost_pool_init(&lov->lov_qos.lq_rr.lqr_pool, 0);
818 lov_ost_pool_free(&lov->lov_packed);
822 lprocfs_lov_init_vars(&lvars);
823 lprocfs_obd_setup(obd, lvars.obd_vars);
828 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
829 0444, &lov_proc_target_fops, obd);
831 CWARN("Error adding the target_obd file\n");
834 lov->lov_pool_proc_entry = lprocfs_register("pools",
841 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
847 case OBD_CLEANUP_EARLY: {
848 struct lov_obd *lov = &obd->u.lov;
850 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
851 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
853 obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
858 case OBD_CLEANUP_EXPORTS:
859 rc = obd_llog_finish(obd, 0);
861 CERROR("failed to cleanup llogging subsystems\n");
867 static int lov_cleanup(struct obd_device *obd)
869 struct lov_obd *lov = &obd->u.lov;
870 struct list_head *pos, *tmp;
871 struct pool_desc *pool;
873 lprocfs_obd_cleanup(obd);
875 /* Delete hash entries and kill hash table before freeing pools
876 * and get to use after free issue. */
877 lustre_hash_exit(lov->lov_pools_hash_body);
879 list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
880 pool = list_entry(pos, struct pool_desc, pool_list);
881 /* free pool structs */
882 lov_pool_del(obd, pool->pool_name);
884 lov_ost_pool_free(&(lov->lov_qos.lq_rr.lqr_pool));
885 lov_ost_pool_free(&lov->lov_packed);
889 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
890 if (!lov->lov_tgts[i])
893 /* Inactive targets may never have connected */
894 if (lov->lov_tgts[i]->ltd_active ||
895 atomic_read(&lov->lov_refcount))
896 /* We should never get here - these
897 should have been removed in the
899 CERROR("lov tgt %d not cleaned!"
900 " deathrow=%d, lovrc=%d\n",
901 i, lov->lov_death_row,
902 atomic_read(&lov->lov_refcount));
903 lov_del_target(obd, i, 0, 0);
905 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
907 lov->lov_tgt_size = 0;
913 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
914 __u32 *indexp, int *genp)
916 struct obd_uuid obd_uuid;
921 switch(cmd = lcfg->lcfg_command) {
922 case LCFG_LOV_ADD_OBD:
923 case LCFG_LOV_ADD_INA:
924 case LCFG_LOV_DEL_OBD: {
927 /* lov_modify_tgts add 0:lov_mdsA 1:ost1_UUID 2:0 3:1 */
928 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
929 GOTO(out, rc = -EINVAL);
931 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
933 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
934 GOTO(out, rc = -EINVAL);
935 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
936 GOTO(out, rc = -EINVAL);
939 if (cmd == LCFG_LOV_ADD_OBD)
940 rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
941 else if (cmd == LCFG_LOV_ADD_INA)
942 rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
944 rc = lov_del_target(obd, index, &obd_uuid, gen);
948 struct lprocfs_static_vars lvars = { 0 };
949 struct lov_desc *desc = &(obd->u.lov.desc);
952 GOTO(out, rc = -EINVAL);
954 lprocfs_lov_init_vars(&lvars);
956 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
969 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
970 GOTO(out, rc = -EINVAL);
979 #define log2(n) ffz(~(n))
982 static int lov_clear_orphans(struct obd_export *export, struct obdo *src_oa,
983 struct lov_stripe_md **ea,
984 struct obd_trans_info *oti)
988 struct obd_uuid *ost_uuid = NULL;
992 LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
993 src_oa->o_flags == OBD_FL_DELORPHAN);
995 lov = &export->exp_obd->u.lov;
1001 if (oti->oti_ost_uuid) {
1002 ost_uuid = oti->oti_ost_uuid;
1003 CDEBUG(D_HA, "clearing orphans only for %s\n",
1007 lov_getref(export->exp_obd);
1008 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1009 struct lov_stripe_md obj_md;
1010 struct lov_stripe_md *obj_mdp = &obj_md;
1011 struct lov_tgt_desc *tgt;
1014 tgt = lov->lov_tgts[i];
1018 /* if called for a specific target, we don't
1019 care if it is not active. */
1020 if (!lov->lov_tgts[i]->ltd_active && ost_uuid == NULL) {
1021 CDEBUG(D_HA, "lov idx %d inactive\n", i);
1025 if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->ltd_uuid))
1028 CDEBUG(D_CONFIG,"Clear orphans for %d:%s\n", i,
1029 obd_uuid2str(ost_uuid));
1031 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1033 LASSERT(lov->lov_tgts[i]->ltd_exp);
1034 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1035 err = obd_create(lov->lov_tgts[i]->ltd_exp,
1036 tmp_oa, &obj_mdp, oti);
1038 /* This export will be disabled until it is recovered,
1039 and then orphan recovery will be completed. */
1040 CERROR("error in orphan recovery on OST idx %d/%d: "
1041 "rc = %d\n", i, lov->desc.ld_tgt_count, err);
1048 lov_putref(export->exp_obd);
1054 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
1055 struct lov_stripe_md **ea, struct obd_trans_info *oti)
1057 struct lov_stripe_md *obj_mdp, *lsm;
1058 struct lov_obd *lov = &exp->exp_obd->u.lov;
1063 LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1064 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1066 OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1067 if (obj_mdp == NULL)
1070 ost_idx = src_oa->o_nlink;
1073 GOTO(out, rc = -EINVAL);
1074 if (ost_idx >= lov->desc.ld_tgt_count ||
1075 !lov->lov_tgts[ost_idx])
1076 GOTO(out, rc = -EINVAL);
1078 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1079 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1080 if (lsm->lsm_oinfo[i]->loi_id != src_oa->o_id)
1081 GOTO(out, rc = -EINVAL);
1085 if (i == lsm->lsm_stripe_count)
1086 GOTO(out, rc = -EINVAL);
1088 rc = obd_create(lov->lov_tgts[ost_idx]->ltd_exp, src_oa, &obj_mdp, oti);
1090 OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1094 /* the LOV expects oa->o_id to be set to the LOV object id */
1095 static int lov_create(struct obd_export *exp, struct obdo *src_oa,
1096 struct lov_stripe_md **ea, struct obd_trans_info *oti)
1098 struct lov_obd *lov;
1099 struct obd_info oinfo;
1100 struct lov_request_set *set = NULL;
1101 struct lov_request *req;
1102 struct obd_statfs osfs;
1107 LASSERT(ea != NULL);
1111 if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1112 src_oa->o_flags == OBD_FL_DELORPHAN) {
1113 rc = lov_clear_orphans(exp, src_oa, ea, oti);
1117 lov = &exp->exp_obd->u.lov;
1118 if (!lov->desc.ld_active_tgt_count)
1121 lov_getref(exp->exp_obd);
1122 /* Recreate a specific object id at the given OST index */
1123 if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1124 (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1125 rc = lov_recreate(exp, src_oa, ea, oti);
1129 maxage = cfs_time_shift_64(-lov->desc.ld_qos_maxage);
1130 obd_statfs_rqset(exp->exp_obd, &osfs, maxage, OBD_STATFS_NODELAY);
1132 rc = lov_prep_create_set(exp, &oinfo, ea, src_oa, oti, &set);
1136 list_for_each_entry(req, &set->set_list, rq_link) {
1137 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1138 rc = obd_create(lov->lov_tgts[req->rq_idx]->ltd_exp,
1139 req->rq_oi.oi_oa, &req->rq_oi.oi_md, oti);
1140 lov_update_create_set(set, req, rc);
1142 rc = lov_fini_create_set(set, ea);
1144 lov_putref(exp->exp_obd);
1148 #define ASSERT_LSM_MAGIC(lsmp) \
1150 LASSERT((lsmp) != NULL); \
1151 LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 || \
1152 (lsmp)->lsm_magic == LOV_MAGIC_V3 || \
1153 (lsmp)->lsm_magic == LOV_MAGIC_JOIN), "%p->lsm_magic=%x\n", \
1154 (lsmp), (lsmp)->lsm_magic); \
1157 static int lov_destroy(struct obd_export *exp, struct obdo *oa,
1158 struct lov_stripe_md *lsm, struct obd_trans_info *oti,
1159 struct obd_export *md_exp, void *capa)
1161 struct lov_request_set *set;
1162 struct obd_info oinfo;
1163 struct lov_request *req;
1164 struct list_head *pos;
1165 struct lov_obd *lov;
1166 int rc = 0, err = 0;
1169 ASSERT_LSM_MAGIC(lsm);
1171 if (!exp || !exp->exp_obd)
1174 if (oa->o_valid & OBD_MD_FLCOOKIE) {
1176 LASSERT(oti->oti_logcookies);
1179 lov = &exp->exp_obd->u.lov;
1180 lov_getref(exp->exp_obd);
1181 rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1185 list_for_each (pos, &set->set_list) {
1186 req = list_entry(pos, struct lov_request, rq_link);
1188 if (oa->o_valid & OBD_MD_FLCOOKIE)
1189 oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1191 err = obd_destroy(lov->lov_tgts[req->rq_idx]->ltd_exp,
1192 req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1193 err = lov_update_common_set(set, req, err);
1195 CERROR("error: destroying objid "LPX64" subobj "
1196 LPX64" on OST idx %d: rc = %d\n",
1197 oa->o_id, req->rq_oi.oi_oa->o_id,
1205 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1206 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1208 err = lov_fini_destroy_set(set);
1210 lov_putref(exp->exp_obd);
1211 RETURN(rc ? rc : err);
1214 static int lov_getattr(struct obd_export *exp, struct obd_info *oinfo)
1216 struct lov_request_set *set;
1217 struct lov_request *req;
1218 struct list_head *pos;
1219 struct lov_obd *lov;
1220 int err = 0, rc = 0;
1224 ASSERT_LSM_MAGIC(oinfo->oi_md);
1226 if (!exp || !exp->exp_obd)
1229 lov = &exp->exp_obd->u.lov;
1231 rc = lov_prep_getattr_set(exp, oinfo, &set);
1235 list_for_each (pos, &set->set_list) {
1236 req = list_entry(pos, struct lov_request, rq_link);
1238 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1239 "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1240 req->rq_oi.oi_oa->o_id, req->rq_idx);
1242 rc = obd_getattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1244 err = lov_update_common_set(set, req, rc);
1246 CERROR("error: getattr objid "LPX64" subobj "
1247 LPX64" on OST idx %d: rc = %d\n",
1248 oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1254 rc = lov_fini_getattr_set(set);
1260 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1263 struct lov_request_set *lovset = (struct lov_request_set *)data;
1267 /* don't do attribute merge if this aysnc op failed */
1269 lovset->set_completes = 0;
1270 err = lov_fini_getattr_set(lovset);
1271 RETURN(rc ? rc : err);
1274 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1275 struct ptlrpc_request_set *rqset)
1277 struct lov_request_set *lovset;
1278 struct lov_obd *lov;
1279 struct list_head *pos;
1280 struct lov_request *req;
1285 ASSERT_LSM_MAGIC(oinfo->oi_md);
1287 if (!exp || !exp->exp_obd)
1290 lov = &exp->exp_obd->u.lov;
1292 rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1296 CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1297 oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1298 oinfo->oi_md->lsm_stripe_size);
1300 list_for_each (pos, &lovset->set_list) {
1301 req = list_entry(pos, struct lov_request, rq_link);
1303 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1304 "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1305 req->rq_oi.oi_oa->o_id, req->rq_idx);
1306 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1307 &req->rq_oi, rqset);
1309 CERROR("error: getattr objid "LPX64" subobj "
1310 LPX64" on OST idx %d: rc = %d\n",
1311 oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1317 if (!list_empty(&rqset->set_requests)) {
1319 LASSERT (rqset->set_interpret == NULL);
1320 rqset->set_interpret = lov_getattr_interpret;
1321 rqset->set_arg = (void *)lovset;
1326 lovset->set_completes = 0;
1327 err = lov_fini_getattr_set(lovset);
1328 RETURN(rc ? rc : err);
1331 static int lov_setattr(struct obd_export *exp, struct obd_info *oinfo,
1332 struct obd_trans_info *oti)
1334 struct lov_request_set *set;
1335 struct lov_obd *lov;
1336 struct list_head *pos;
1337 struct lov_request *req;
1338 int err = 0, rc = 0;
1342 ASSERT_LSM_MAGIC(oinfo->oi_md);
1344 if (!exp || !exp->exp_obd)
1347 /* for now, we only expect the following updates here */
1348 LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1349 OBD_MD_FLMODE | OBD_MD_FLATIME |
1350 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1351 OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1352 OBD_MD_FLGROUP | OBD_MD_FLUID |
1353 OBD_MD_FLGID | OBD_MD_FLFID |
1355 lov = &exp->exp_obd->u.lov;
1356 rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1360 list_for_each (pos, &set->set_list) {
1361 req = list_entry(pos, struct lov_request, rq_link);
1363 rc = obd_setattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1365 err = lov_update_setattr_set(set, req, rc);
1367 CERROR("error: setattr objid "LPX64" subobj "
1368 LPX64" on OST idx %d: rc = %d\n",
1369 set->set_oi->oi_oa->o_id,
1370 req->rq_oi.oi_oa->o_id, req->rq_idx, err);
1375 err = lov_fini_setattr_set(set);
1381 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1384 struct lov_request_set *lovset = (struct lov_request_set *)data;
1389 lovset->set_completes = 0;
1390 err = lov_fini_setattr_set(lovset);
1391 RETURN(rc ? rc : err);
1394 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1395 needed. Otherwise, a client is waiting for responses. */
1396 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1397 struct obd_trans_info *oti,
1398 struct ptlrpc_request_set *rqset)
1400 struct lov_request_set *set;
1401 struct lov_request *req;
1402 struct list_head *pos;
1403 struct lov_obd *lov;
1408 ASSERT_LSM_MAGIC(oinfo->oi_md);
1409 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1411 LASSERT(oti->oti_logcookies);
1414 if (!exp || !exp->exp_obd)
1417 lov = &exp->exp_obd->u.lov;
1418 rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1422 CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1423 oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1424 oinfo->oi_md->lsm_stripe_size);
1426 list_for_each (pos, &set->set_list) {
1427 req = list_entry(pos, struct lov_request, rq_link);
1429 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1430 oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1432 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1433 "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1434 req->rq_oi.oi_oa->o_id, req->rq_idx);
1436 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1437 &req->rq_oi, oti, rqset);
1439 CERROR("error: setattr objid "LPX64" subobj "
1440 LPX64" on OST idx %d: rc = %d\n",
1441 set->set_oi->oi_oa->o_id,
1442 req->rq_oi.oi_oa->o_id,
1448 /* If we are not waiting for responses on async requests, return. */
1449 if (rc || !rqset || list_empty(&rqset->set_requests)) {
1452 set->set_completes = 0;
1453 err = lov_fini_setattr_set(set);
1454 RETURN(rc ? rc : err);
1457 LASSERT(rqset->set_interpret == NULL);
1458 rqset->set_interpret = lov_setattr_interpret;
1459 rqset->set_arg = (void *)set;
1464 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1467 struct lov_request_set *lovset = (struct lov_request_set *)data;
1472 lovset->set_completes = 0;
1473 err = lov_fini_punch_set(lovset);
1474 RETURN(rc ? rc : err);
1477 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1478 * we can send this 'punch' to just the authoritative node and the nodes
1479 * that the punch will affect. */
1480 static int lov_punch(struct obd_export *exp, struct obd_info *oinfo,
1481 struct obd_trans_info *oti,
1482 struct ptlrpc_request_set *rqset)
1484 struct lov_request_set *set;
1485 struct lov_obd *lov;
1486 struct list_head *pos;
1487 struct lov_request *req;
1492 ASSERT_LSM_MAGIC(oinfo->oi_md);
1494 if (!exp || !exp->exp_obd)
1497 lov = &exp->exp_obd->u.lov;
1498 rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1502 list_for_each (pos, &set->set_list) {
1503 req = list_entry(pos, struct lov_request, rq_link);
1505 rc = obd_punch(lov->lov_tgts[req->rq_idx]->ltd_exp,
1506 &req->rq_oi, NULL, rqset);
1508 CERROR("error: punch objid "LPX64" subobj "LPX64
1509 " on OST idx %d: rc = %d\n",
1510 set->set_oi->oi_oa->o_id,
1511 req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1516 if (rc || list_empty(&rqset->set_requests)) {
1518 err = lov_fini_punch_set(set);
1519 RETURN(rc ? rc : err);
1522 LASSERT(rqset->set_interpret == NULL);
1523 rqset->set_interpret = lov_punch_interpret;
1524 rqset->set_arg = (void *)set;
1529 static int lov_sync(struct obd_export *exp, struct obdo *oa,
1530 struct lov_stripe_md *lsm, obd_off start, obd_off end,
1533 struct lov_request_set *set;
1534 struct obd_info oinfo;
1535 struct lov_obd *lov;
1536 struct list_head *pos;
1537 struct lov_request *req;
1538 int err = 0, rc = 0;
1541 ASSERT_LSM_MAGIC(lsm);
1546 lov = &exp->exp_obd->u.lov;
1547 rc = lov_prep_sync_set(exp, &oinfo, oa, lsm, start, end, &set);
1551 list_for_each (pos, &set->set_list) {
1552 req = list_entry(pos, struct lov_request, rq_link);
1554 rc = obd_sync(lov->lov_tgts[req->rq_idx]->ltd_exp,
1555 req->rq_oi.oi_oa, NULL,
1556 req->rq_oi.oi_policy.l_extent.start,
1557 req->rq_oi.oi_policy.l_extent.end, capa);
1558 err = lov_update_common_set(set, req, rc);
1560 CERROR("error: fsync objid "LPX64" subobj "LPX64
1561 " on OST idx %d: rc = %d\n",
1562 set->set_oi->oi_oa->o_id,
1563 req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1568 err = lov_fini_sync_set(set);
1574 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1575 obd_count oa_bufs, struct brw_page *pga)
1577 struct obd_info oinfo = { { { 0 } } };
1580 oinfo.oi_oa = lov_oinfo->oi_oa;
1582 /* The caller just wants to know if there's a chance that this
1583 * I/O can succeed */
1584 for (i = 0; i < oa_bufs; i++) {
1585 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1586 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1589 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1590 pga[i].off + pga[i].count - 1,
1594 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1595 CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1599 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1607 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1608 obd_count oa_bufs, struct brw_page *pga,
1609 struct obd_trans_info *oti)
1611 struct lov_request_set *set;
1612 struct lov_request *req;
1613 struct list_head *pos;
1614 struct lov_obd *lov = &exp->exp_obd->u.lov;
1618 ASSERT_LSM_MAGIC(oinfo->oi_md);
1620 if (cmd == OBD_BRW_CHECK) {
1621 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1625 rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1629 list_for_each (pos, &set->set_list) {
1630 struct obd_export *sub_exp;
1631 struct brw_page *sub_pga;
1632 req = list_entry(pos, struct lov_request, rq_link);
1634 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1635 sub_pga = set->set_pga + req->rq_pgaidx;
1636 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1640 lov_update_common_set(set, req, rc);
1643 err = lov_fini_brw_set(set);
1649 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
1652 struct lov_request_set *lovset = (struct lov_request_set *)data;
1654 rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
1658 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
1659 struct ldlm_enqueue_info *einfo,
1660 struct ptlrpc_request_set *rqset)
1662 ldlm_mode_t mode = einfo->ei_mode;
1663 struct lov_request_set *set;
1664 struct lov_request *req;
1665 struct list_head *pos;
1666 struct lov_obd *lov;
1671 ASSERT_LSM_MAGIC(oinfo->oi_md);
1672 LASSERT(mode == (mode & -mode));
1674 /* we should never be asked to replay a lock this way. */
1675 LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
1677 if (!exp || !exp->exp_obd)
1680 lov = &exp->exp_obd->u.lov;
1681 rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
1685 list_for_each (pos, &set->set_list) {
1686 req = list_entry(pos, struct lov_request, rq_link);
1688 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
1689 &req->rq_oi, einfo, rqset);
1694 if (rqset && !list_empty(&rqset->set_requests)) {
1696 LASSERT(rqset->set_interpret == NULL);
1697 rqset->set_interpret = lov_enqueue_interpret;
1698 rqset->set_arg = (void *)set;
1702 rc = lov_fini_enqueue_set(set, mode, rc, rqset);
1706 static int lov_change_cbdata(struct obd_export *exp,
1707 struct lov_stripe_md *lsm, ldlm_iterator_t it,
1710 struct lov_obd *lov;
1714 ASSERT_LSM_MAGIC(lsm);
1716 if (!exp || !exp->exp_obd)
1719 LASSERT_MDS_GROUP(lsm->lsm_object_gr);
1721 lov = &exp->exp_obd->u.lov;
1722 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1723 struct lov_stripe_md submd;
1724 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1726 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1727 CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1731 submd.lsm_object_id = loi->loi_id;
1732 submd.lsm_object_gr = lsm->lsm_object_gr;
1733 submd.lsm_stripe_count = 0;
1734 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1740 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1741 __u32 mode, struct lustre_handle *lockh)
1743 struct lov_request_set *set;
1744 struct obd_info oinfo;
1745 struct lov_request *req;
1746 struct list_head *pos;
1747 struct lov_obd *lov = &exp->exp_obd->u.lov;
1748 struct lustre_handle *lov_lockhp;
1749 int err = 0, rc = 0;
1752 ASSERT_LSM_MAGIC(lsm);
1754 if (!exp || !exp->exp_obd)
1757 LASSERT_MDS_GROUP(lsm->lsm_object_gr);
1759 lov = &exp->exp_obd->u.lov;
1760 rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
1764 list_for_each (pos, &set->set_list) {
1765 req = list_entry(pos, struct lov_request, rq_link);
1766 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1768 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
1769 req->rq_oi.oi_md, mode, lov_lockhp);
1770 rc = lov_update_common_set(set, req, rc);
1772 CERROR("error: cancel objid "LPX64" subobj "
1773 LPX64" on OST idx %d: rc = %d\n",
1775 req->rq_oi.oi_md->lsm_object_id,
1781 lov_fini_cancel_set(set);
1785 static int lov_cancel_unused(struct obd_export *exp,
1786 struct lov_stripe_md *lsm,
1787 int flags, void *opaque)
1789 struct lov_obd *lov;
1793 if (!exp || !exp->exp_obd)
1796 lov = &exp->exp_obd->u.lov;
1798 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1800 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1803 err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
1811 ASSERT_LSM_MAGIC(lsm);
1813 LASSERT_MDS_GROUP(lsm->lsm_object_gr);
1814 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1815 struct lov_stripe_md submd;
1816 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1819 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1820 CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
1824 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
1825 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1827 submd.lsm_object_id = loi->loi_id;
1828 submd.lsm_object_gr = lsm->lsm_object_gr;
1829 submd.lsm_stripe_count = 0;
1830 err = obd_cancel_unused(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1831 &submd, flags, opaque);
1832 if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1833 CERROR("error: cancel unused objid "LPX64" subobj "LPX64
1834 " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
1835 loi->loi_id, loi->loi_ost_idx, err);
1843 static int lov_statfs_interpret(struct ptlrpc_request_set *rqset,
1846 struct lov_request_set *lovset = (struct lov_request_set *)data;
1851 lovset->set_completes = 0;
1853 err = lov_fini_statfs_set(lovset);
1854 RETURN(rc ? rc : err);
1857 static int lov_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
1858 __u64 max_age, struct ptlrpc_request_set *rqset)
1860 struct lov_request_set *set;
1861 struct lov_request *req;
1862 struct list_head *pos;
1863 struct lov_obd *lov;
1867 LASSERT(oinfo != NULL);
1868 LASSERT(oinfo->oi_osfs != NULL);
1871 rc = lov_prep_statfs_set(obd, oinfo, &set);
1875 list_for_each (pos, &set->set_list) {
1876 struct obd_device *osc_obd;
1878 req = list_entry(pos, struct lov_request, rq_link);
1880 osc_obd = class_exp2obd(lov->lov_tgts[req->rq_idx]->ltd_exp);
1881 rc = obd_statfs_async(osc_obd, &req->rq_oi, max_age, rqset);
1886 if (rc || list_empty(&rqset->set_requests)) {
1889 set->set_completes = 0;
1890 err = lov_fini_statfs_set(set);
1891 RETURN(rc ? rc : err);
1894 LASSERT(rqset->set_interpret == NULL);
1895 rqset->set_interpret = lov_statfs_interpret;
1896 rqset->set_arg = (void *)set;
1900 static int lov_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1901 __u64 max_age, __u32 flags)
1903 struct ptlrpc_request_set *set = NULL;
1904 struct obd_info oinfo = { { { 0 } } };
1909 /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1910 * statfs requests */
1911 set = ptlrpc_prep_set();
1915 oinfo.oi_osfs = osfs;
1916 oinfo.oi_flags = flags;
1917 rc = lov_statfs_async(obd, &oinfo, max_age, set);
1919 rc = ptlrpc_set_wait(set);
1920 ptlrpc_set_destroy(set);
1925 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1926 void *karg, void *uarg)
1928 struct obd_device *obddev = class_exp2obd(exp);
1929 struct lov_obd *lov = &obddev->u.lov;
1930 int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1931 struct obd_uuid *uuidp;
1935 case IOC_OBD_STATFS: {
1936 struct obd_ioctl_data *data = karg;
1937 struct obd_device *osc_obd;
1938 struct obd_statfs stat_buf = {0};
1941 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1942 LASSERT(data->ioc_plen1 == sizeof(struct obd_statfs));
1944 if ((index >= count))
1947 if (!lov->lov_tgts[index])
1948 /* Try again with the next index */
1950 if (!lov->lov_tgts[index]->ltd_active)
1953 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1957 /* got statfs data */
1958 rc = obd_statfs(osc_obd, &stat_buf,
1959 cfs_time_current_64() - HZ, 0);
1962 if (copy_to_user(data->ioc_pbuf1, &stat_buf, data->ioc_plen1))
1965 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1970 case OBD_IOC_LOV_GET_CONFIG: {
1971 struct obd_ioctl_data *data;
1972 struct lov_desc *desc;
1977 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1980 data = (struct obd_ioctl_data *)buf;
1982 if (sizeof(*desc) > data->ioc_inllen1) {
1983 obd_ioctl_freedata(buf, len);
1987 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1988 obd_ioctl_freedata(buf, len);
1992 if (sizeof(__u32) * count > data->ioc_inllen3) {
1993 obd_ioctl_freedata(buf, len);
1997 desc = (struct lov_desc *)data->ioc_inlbuf1;
1998 memcpy(desc, &(lov->desc), sizeof(*desc));
2000 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2001 genp = (__u32 *)data->ioc_inlbuf3;
2002 /* the uuid will be empty for deleted OSTs */
2003 for (i = 0; i < count; i++, uuidp++, genp++) {
2004 if (!lov->lov_tgts[i])
2006 *uuidp = lov->lov_tgts[i]->ltd_uuid;
2007 *genp = lov->lov_tgts[i]->ltd_gen;
2010 if (copy_to_user((void *)uarg, buf, len))
2012 obd_ioctl_freedata(buf, len);
2015 case LL_IOC_LOV_SETSTRIPE:
2016 rc = lov_setstripe(exp, karg, uarg);
2018 case LL_IOC_LOV_GETSTRIPE:
2019 rc = lov_getstripe(exp, karg, uarg);
2021 case LL_IOC_LOV_SETEA:
2022 rc = lov_setea(exp, karg, uarg);
2024 case OBD_IOC_QUOTACTL: {
2025 struct if_quotactl *qctl = karg;
2026 struct lov_tgt_desc *tgt = NULL;
2027 struct obd_quotactl *oqctl;
2029 if (qctl->qc_valid == QC_OSTIDX) {
2030 if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
2033 tgt = lov->lov_tgts[qctl->qc_idx];
2034 if (!tgt || !tgt->ltd_exp)
2036 } else if (qctl->qc_valid == QC_UUID) {
2037 for (i = 0; i < count; i++) {
2038 tgt = lov->lov_tgts[i];
2040 !obd_uuid_equals(&tgt->ltd_uuid,
2044 if (tgt->ltd_exp == NULL)
2056 LASSERT(tgt && tgt->ltd_exp);
2057 OBD_ALLOC_PTR(oqctl);
2061 QCTL_COPY(oqctl, qctl);
2062 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2064 QCTL_COPY(qctl, oqctl);
2065 qctl->qc_valid = QC_OSTIDX;
2066 qctl->obd_uuid = tgt->ltd_uuid;
2068 OBD_FREE_PTR(oqctl);
2077 for (i = 0; i < count; i++) {
2080 /* OST was disconnected */
2081 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2084 err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2086 if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2089 if (lov->lov_tgts[i]->ltd_active) {
2090 CDEBUG(err == -ENOTTY ?
2091 D_IOCTL : D_WARNING,
2092 "iocontrol OSC %s on OST "
2093 "idx %d cmd %x: err = %d\n",
2094 lov_uuid2str(lov, i),
2111 #define FIEMAP_BUFFER_SIZE 4096
2114 * Non-zero fe_logical indicates that this is a continuation FIEMAP
2115 * call. The local end offset and the device are sent in the first
2116 * fm_extent. This function calculates the stripe number from the index.
2117 * This function returns a stripe_no on which mapping is to be restarted.
2119 * This function returns fm_end_offset which is the in-OST offset at which
2120 * mapping should be restarted. If fm_end_offset=0 is returned then caller
2121 * will re-calculate proper offset in next stripe.
2122 * Note that the first extent is passed to lov_get_info via the value field.
2124 * \param fiemap fiemap request header
2125 * \param lsm striping information for the file
2126 * \param fm_start logical start of mapping
2127 * \param fm_end logical end of mapping
2128 * \param start_stripe starting stripe will be returned in this
2130 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
2131 struct lov_stripe_md *lsm, obd_size fm_start,
2132 obd_size fm_end, int *start_stripe)
2134 obd_size local_end = fiemap->fm_extents[0].fe_logical;
2135 obd_off lun_start, lun_end;
2136 obd_size fm_end_offset;
2137 int stripe_no = -1, i;
2139 if (fiemap->fm_extent_count == 0 ||
2140 fiemap->fm_extents[0].fe_logical == 0)
2143 /* Find out stripe_no from ost_index saved in the fe_device */
2144 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2145 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
2146 fiemap->fm_extents[0].fe_device) {
2152 /* If we have finished mapping on previous device, shift logical
2153 * offset to start of next device */
2154 if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
2155 &lun_start, &lun_end)) != 0 &&
2156 local_end < lun_end) {
2157 fm_end_offset = local_end;
2158 *start_stripe = stripe_no;
2160 /* This is a special value to indicate that caller should
2161 * calculate offset in next stripe. */
2163 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
2166 return fm_end_offset;
2170 * We calculate on which OST the mapping will end. If the length of mapping
2171 * is greater than (stripe_size * stripe_count) then the last_stripe will
2172 * will be one just before start_stripe. Else we check if the mapping
2173 * intersects each OST and find last_stripe.
2174 * This function returns the last_stripe and also sets the stripe_count
2175 * over which the mapping is spread
2177 * \param lsm striping information for the file
2178 * \param fm_start logical start of mapping
2179 * \param fm_end logical end of mapping
2180 * \param start_stripe starting stripe of the mapping
2181 * \param stripe_count the number of stripes across which to map is returned
2183 * \retval last_stripe return the last stripe of the mapping
2185 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
2186 obd_size fm_end, int start_stripe,
2190 obd_off obd_start, obd_end;
2193 if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
2194 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
2196 *stripe_count = lsm->lsm_stripe_count;
2198 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
2199 i = (i + 1) % lsm->lsm_stripe_count, j++) {
2200 if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
2201 &obd_start, &obd_end)) == 0)
2205 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
2212 * Set fe_device and copy extents from local buffer into main return buffer.
2214 * \param fiemap fiemap request header
2215 * \param lcl_fm_ext array of local fiemap extents to be copied
2216 * \param ost_index OST index to be written into the fm_device field for each
2218 * \param ext_count number of extents to be copied
2219 * \param current_extent where to start copying in main extent array
2221 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
2222 struct ll_fiemap_extent *lcl_fm_ext,
2223 int ost_index, unsigned int ext_count,
2229 for (ext = 0; ext < ext_count; ext++) {
2230 lcl_fm_ext[ext].fe_device = ost_index;
2231 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
2234 /* Copy fm_extent's from fm_local to return buffer */
2235 to = (char *)fiemap + fiemap_count_to_size(current_extent);
2236 memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
2240 * Break down the FIEMAP request and send appropriate calls to individual OSTs.
2241 * This also handles the restarting of FIEMAP calls in case mapping overflows
2242 * the available number of extents in single call.
2244 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
2245 __u32 *vallen, void *val, struct lov_stripe_md *lsm)
2247 struct ll_fiemap_info_key *fm_key = key;
2248 struct ll_user_fiemap *fiemap = val;
2249 struct ll_user_fiemap *fm_local = NULL;
2250 struct ll_fiemap_extent *lcl_fm_ext;
2252 unsigned int get_num_extents = 0;
2253 int ost_index = 0, actual_start_stripe, start_stripe;
2254 obd_size fm_start, fm_end, fm_length, fm_end_offset = 0;
2256 int current_extent = 0, rc = 0, i;
2257 int ost_eof = 0; /* EOF for object */
2258 int ost_done = 0; /* done with required mapping for this OST? */
2260 int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
2261 unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
2266 if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
2267 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
2269 OBD_ALLOC(fm_local, buffer_size);
2270 if (fm_local == NULL)
2271 GOTO(out, rc = -ENOMEM);
2272 lcl_fm_ext = &fm_local->fm_extents[0];
2274 count_local = fiemap_size_to_count(buffer_size);
2276 memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
2277 fm_start = fiemap->fm_start;
2278 fm_length = fiemap->fm_length;
2279 /* Calculate start stripe, last stripe and length of mapping */
2280 actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
2281 fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
2282 fm_start + fm_length - 1);
2283 /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
2284 if (fm_end > fm_key->oa.o_size)
2285 fm_end = fm_key->oa.o_size;
2287 last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
2288 actual_start_stripe, &stripe_count);
2290 fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start, fm_end,
2293 if (fiemap->fm_extent_count == 0) {
2294 get_num_extents = 1;
2298 /* Check each stripe */
2299 for (cur_stripe = start_stripe, i = 0; i < stripe_count;
2300 i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
2301 obd_size req_fm_len; /* Stores length of required mapping */
2302 obd_size len_mapped_single_call;
2303 obd_off lun_start, lun_end, obd_object_end;
2304 unsigned int ext_count;
2306 cur_stripe_wrap = cur_stripe;
2308 /* Find out range of mapping on this stripe */
2309 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
2310 &lun_start, &obd_object_end)) == 0)
2313 /* If this is a continuation FIEMAP call and we are on
2314 * starting stripe then lun_start needs to be set to
2316 if (fm_end_offset != 0 && cur_stripe == start_stripe)
2317 lun_start = fm_end_offset;
2319 if (fm_length != ~0ULL) {
2320 /* Handle fm_start + fm_length overflow */
2321 if (fm_start + fm_length < fm_start)
2322 fm_length = ~0ULL - fm_start;
2323 lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
2329 if (lun_start == lun_end)
2332 req_fm_len = obd_object_end - lun_start;
2333 fm_local->fm_length = 0;
2334 len_mapped_single_call = 0;
2336 /* If the output buffer is very large and the objects have many
2337 * extents we may need to loop on a single OST repeatedly */
2341 if (get_num_extents == 0) {
2342 /* Don't get too many extents. */
2343 if (current_extent + count_local >
2344 fiemap->fm_extent_count)
2345 count_local = fiemap->fm_extent_count -
2349 lun_start += len_mapped_single_call;
2350 fm_local->fm_length = req_fm_len - len_mapped_single_call;
2351 req_fm_len = fm_local->fm_length;
2352 fm_local->fm_extent_count = count_local;
2353 fm_local->fm_mapped_extents = 0;
2354 fm_local->fm_flags = fiemap->fm_flags;
2356 fm_key->oa.o_id = lsm->lsm_oinfo[cur_stripe]->loi_id;
2357 ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
2359 if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
2360 GOTO(out, rc = -EINVAL);
2362 /* If OST is inactive, return extent with UNKNOWN flag */
2363 if (lov && !lov->lov_tgts[ost_index]->ltd_active) {
2364 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
2365 fm_local->fm_mapped_extents = 1;
2367 lcl_fm_ext[0].fe_logical = lun_start;
2368 lcl_fm_ext[0].fe_length = obd_object_end -
2370 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
2375 fm_local->fm_start = lun_start;
2376 fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
2377 memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
2378 *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
2379 rc = obd_get_info(lov->lov_tgts[ost_index]->ltd_exp,
2380 keylen, key, vallen, fm_local, lsm);
2385 ext_count = fm_local->fm_mapped_extents;
2386 if (ext_count == 0) {
2388 /* If last stripe has hole at the end,
2389 * then we need to return */
2390 if (cur_stripe_wrap == last_stripe) {
2391 fiemap->fm_mapped_extents = 0;
2397 /* If we just need num of extents then go to next device */
2398 if (get_num_extents) {
2399 current_extent += ext_count;
2403 len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2404 lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2406 /* Have we finished mapping on this device? */
2407 if (req_fm_len <= len_mapped_single_call)
2410 /* Clear the EXTENT_LAST flag which can be present on
2412 if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2413 lcl_fm_ext[ext_count - 1].fe_flags &=
2414 ~FIEMAP_EXTENT_LAST;
2416 curr_loc = lov_stripe_size(lsm,
2417 lcl_fm_ext[ext_count - 1].fe_logical+
2418 lcl_fm_ext[ext_count - 1].fe_length,
2420 if (curr_loc >= fm_key->oa.o_size)
2423 fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2424 ost_index, ext_count,
2427 current_extent += ext_count;
2429 /* Ran out of available extents? */
2430 if (current_extent >= fiemap->fm_extent_count)
2432 } while (ost_done == 0 && ost_eof == 0);
2434 if (cur_stripe_wrap == last_stripe)
2439 /* Indicate that we are returning device offsets unless file just has
2441 if (lsm->lsm_stripe_count > 1)
2442 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2444 if (get_num_extents)
2445 goto skip_last_device_calc;
2447 /* Check if we have reached the last stripe and whether mapping for that
2448 * stripe is done. */
2449 if (cur_stripe_wrap == last_stripe) {
2450 if (ost_done || ost_eof)
2451 fiemap->fm_extents[current_extent - 1].fe_flags |=
2455 skip_last_device_calc:
2456 fiemap->fm_mapped_extents = current_extent;
2459 OBD_FREE(fm_local, buffer_size);
2463 static int lov_get_info(struct obd_export *exp, __u32 keylen,
2464 void *key, __u32 *vallen, void *val,
2465 struct lov_stripe_md *lsm)
2467 struct obd_device *obddev = class_exp2obd(exp);
2468 struct lov_obd *lov = &obddev->u.lov;
2472 if (!vallen || !val)
2477 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2480 struct ldlm_lock *lock;
2482 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2483 struct lov_oinfo *loi;
2484 __u32 *stripe = val;
2486 if (*vallen < sizeof(*stripe))
2487 GOTO(out, rc = -EFAULT);
2488 *vallen = sizeof(*stripe);
2490 /* XXX This is another one of those bits that will need to
2491 * change if we ever actually support nested LOVs. It uses
2492 * the lock's export to find out which stripe it is. */
2493 /* XXX - it's assumed all the locks for deleted OSTs have
2494 * been cancelled. Also, the export for deleted OSTs will
2495 * be NULL and won't match the lock's export. */
2496 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2497 loi = lsm->lsm_oinfo[i];
2498 if (!lov->lov_tgts[loi->loi_ost_idx])
2500 if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2501 data->lock->l_conn_export &&
2502 osc_res_name_eq(loi->loi_id, loi->loi_gr, res_id)) {
2507 LDLM_ERROR(data->lock, "lock on inode without such object");
2508 dump_lsm(D_ERROR, lsm);
2509 GOTO(out, rc = -ENXIO);
2510 } else if (KEY_IS(KEY_LAST_ID)) {
2511 struct obd_id_info *info = val;
2512 __u32 size = sizeof(obd_id);
2513 struct lov_tgt_desc *tgt;
2515 LASSERT(*vallen == sizeof(struct obd_id_info));
2516 tgt = lov->lov_tgts[info->idx];
2518 if (!tgt || !tgt->ltd_active)
2519 GOTO(out, rc = -ESRCH);
2521 rc = obd_get_info(tgt->ltd_exp, keylen, key, &size, info->data, NULL);
2523 } else if (KEY_IS(KEY_LOVDESC)) {
2524 struct lov_desc *desc_ret = val;
2525 *desc_ret = lov->desc;
2528 } else if (KEY_IS(KEY_FIEMAP)) {
2529 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2540 static int lov_set_info_async(struct obd_export *exp, obd_count keylen,
2541 void *key, obd_count vallen, void *val,
2542 struct ptlrpc_request_set *set)
2544 struct obd_device *obddev = class_exp2obd(exp);
2545 struct lov_obd *lov = &obddev->u.lov;
2548 struct lov_tgt_desc *tgt;
2549 unsigned incr, check_uuid,
2550 do_inactive, no_set;
2551 unsigned next_id = 0, mds_con = 0;
2554 incr = check_uuid = do_inactive = no_set = 0;
2557 set = ptlrpc_prep_set();
2563 count = lov->desc.ld_tgt_count;
2565 if (KEY_IS(KEY_NEXT_ID)) {
2566 count = vallen / sizeof(struct obd_id_info);
2567 vallen = sizeof(obd_id);
2568 incr = sizeof(struct obd_id_info);
2571 } else if (KEY_IS(KEY_CHECKSUM)) {
2573 } else if (KEY_IS(KEY_UNLINKED)) {
2574 check_uuid = val ? 1 : 0;
2575 } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2576 /* use defaults: do_inactive = incr = 0; */
2577 } else if (KEY_IS(KEY_MDS_CONN)) {
2581 for (i = 0; i < count; i++, val = (char *)val + incr) {
2583 tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2585 tgt = lov->lov_tgts[i];
2587 /* OST was disconnected */
2588 if (!tgt || !tgt->ltd_exp)
2591 /* OST is inactive and we don't want inactive OSCs */
2592 if (!tgt->ltd_active && !do_inactive)
2596 struct mds_group_info *mgi;
2598 LASSERT(vallen == sizeof(*mgi));
2599 mgi = (struct mds_group_info *)val;
2601 /* Only want a specific OSC */
2602 if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2606 err = obd_set_info_async(tgt->ltd_exp,
2607 keylen, key, sizeof(int),
2609 } else if (next_id) {
2610 err = obd_set_info_async(tgt->ltd_exp,
2611 keylen, key, vallen,
2612 ((struct obd_id_info*)val)->data, set);
2614 /* Only want a specific OSC */
2616 !obd_uuid_equals(val, &tgt->ltd_uuid))
2619 err = obd_set_info_async(tgt->ltd_exp,
2620 keylen, key, vallen, val, set);
2629 err = ptlrpc_set_wait(set);
2632 ptlrpc_set_destroy(set);
2637 static int lov_checkmd(struct obd_export *exp, struct obd_export *md_exp,
2638 struct lov_stripe_md *lsm)
2646 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
2647 rc = lsm_op_find(lsm->lsm_magic)->lsm_revalidate(lsm, md_exp->exp_obd);
2652 int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm)
2657 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2658 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2659 if (loi->loi_ar.ar_rc && !rc)
2660 rc = loi->loi_ar.ar_rc;
2661 loi->loi_ar.ar_rc = 0;
2665 EXPORT_SYMBOL(lov_test_and_clear_async_rc);
2668 static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm,
2669 int cmd, __u64 *offset)
2671 __u32 ssize = lsm->lsm_stripe_size;
2675 do_div(start, ssize);
2676 start = start * ssize;
2678 CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64
2679 ", end "LPU64"\n", *offset, ssize, start,
2681 if (cmd == OBD_CALC_STRIPE_END) {
2682 *offset = start + ssize - 1;
2683 } else if (cmd == OBD_CALC_STRIPE_START) {
2692 void lov_stripe_lock(struct lov_stripe_md *md)
2694 LASSERT(md->lsm_lock_owner != cfs_curproc_pid());
2695 spin_lock(&md->lsm_lock);
2696 LASSERT(md->lsm_lock_owner == 0);
2697 md->lsm_lock_owner = cfs_curproc_pid();
2699 EXPORT_SYMBOL(lov_stripe_lock);
2701 void lov_stripe_unlock(struct lov_stripe_md *md)
2703 LASSERT(md->lsm_lock_owner == cfs_curproc_pid());
2704 md->lsm_lock_owner = 0;
2705 spin_unlock(&md->lsm_lock);
2707 EXPORT_SYMBOL(lov_stripe_unlock);
2710 struct obd_ops lov_obd_ops = {
2711 .o_owner = THIS_MODULE,
2712 .o_setup = lov_setup,
2713 .o_precleanup = lov_precleanup,
2714 .o_cleanup = lov_cleanup,
2715 //.o_process_config = lov_process_config,
2716 .o_connect = lov_connect,
2717 .o_disconnect = lov_disconnect,
2718 .o_statfs = lov_statfs,
2719 .o_statfs_async = lov_statfs_async,
2720 .o_packmd = lov_packmd,
2721 .o_unpackmd = lov_unpackmd,
2722 .o_checkmd = lov_checkmd,
2723 .o_create = lov_create,
2724 .o_destroy = lov_destroy,
2725 .o_getattr = lov_getattr,
2726 .o_getattr_async = lov_getattr_async,
2727 .o_setattr = lov_setattr,
2728 .o_setattr_async = lov_setattr_async,
2730 .o_merge_lvb = lov_merge_lvb,
2731 .o_adjust_kms = lov_adjust_kms,
2732 .o_punch = lov_punch,
2734 .o_enqueue = lov_enqueue,
2735 .o_change_cbdata = lov_change_cbdata,
2736 .o_cancel = lov_cancel,
2737 .o_cancel_unused = lov_cancel_unused,
2738 .o_iocontrol = lov_iocontrol,
2739 .o_get_info = lov_get_info,
2740 .o_set_info_async = lov_set_info_async,
2741 .o_extent_calc = lov_extent_calc,
2742 .o_llog_init = lov_llog_init,
2743 .o_llog_finish = lov_llog_finish,
2744 .o_notify = lov_notify,
2745 .o_pool_new = lov_pool_new,
2746 .o_pool_rem = lov_pool_remove,
2747 .o_pool_add = lov_pool_add,
2748 .o_pool_del = lov_pool_del,
2751 static quota_interface_t *quota_interface;
2752 extern quota_interface_t lov_quota_interface;
2754 cfs_mem_cache_t *lov_oinfo_slab;
2756 extern struct lu_kmem_descr lov_caches[];
2758 int __init lov_init(void)
2760 struct lprocfs_static_vars lvars = { 0 };
2764 /* print an address of _any_ initialized kernel symbol from this
2765 * module, to allow debugging with gdb that doesn't support data
2766 * symbols from modules.*/
2767 CDEBUG(D_CONSOLE, "Lustre LOV module (%p).\n", &lov_caches);
2769 rc = lu_kmem_init(lov_caches);
2773 lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo",
2774 sizeof(struct lov_oinfo),
2775 0, SLAB_HWCACHE_ALIGN);
2776 if (lov_oinfo_slab == NULL) {
2777 lu_kmem_fini(lov_caches);
2780 lprocfs_lov_init_vars(&lvars);
2782 request_module("lquota");
2783 quota_interface = PORTAL_SYMBOL_GET(lov_quota_interface);
2784 init_obd_quota_ops(quota_interface, &lov_obd_ops);
2786 rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
2787 LUSTRE_LOV_NAME, &lov_device_type);
2790 if (quota_interface)
2791 PORTAL_SYMBOL_PUT(lov_quota_interface);
2792 rc2 = cfs_mem_cache_destroy(lov_oinfo_slab);
2794 lu_kmem_fini(lov_caches);
2801 static void /*__exit*/ lov_exit(void)
2805 lu_device_type_fini(&lov_device_type);
2806 lu_kmem_fini(lov_caches);
2808 if (quota_interface)
2809 PORTAL_SYMBOL_PUT(lov_quota_interface);
2811 class_unregister_type(LUSTRE_LOV_NAME);
2812 rc = cfs_mem_cache_destroy(lov_oinfo_slab);
2816 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2817 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2818 MODULE_LICENSE("GPL");
2820 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);