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 <lustre_cache.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, __u32 index);
87 void lov_putref(struct obd_device *obd)
89 struct lov_obd *lov = &obd->u.lov;
90 mutex_down(&lov->lov_lock);
91 /* ok to dec to 0 more than once -- ltd_exp's will be null */
92 if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
94 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
96 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
97 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_reap)
99 /* Disconnect and delete from list */
100 __lov_del_obd(obd, i);
101 lov->lov_death_row--;
104 mutex_up(&lov->lov_lock);
107 static int lov_register_page_removal_cb(struct obd_export *exp,
108 obd_page_removal_cb_t func,
109 obd_pin_extent_cb pin_cb)
111 struct lov_obd *lov = &exp->exp_obd->u.lov;
114 if (lov->lov_page_removal_cb && lov->lov_page_removal_cb != func)
117 if (lov->lov_page_pin_cb && lov->lov_page_pin_cb != pin_cb)
120 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
121 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
123 rc |= obd_register_page_removal_cb(lov->lov_tgts[i]->ltd_exp,
127 lov->lov_page_removal_cb = func;
128 lov->lov_page_pin_cb = pin_cb;
133 static int lov_unregister_page_removal_cb(struct obd_export *exp,
134 obd_page_removal_cb_t func)
136 struct lov_obd *lov = &exp->exp_obd->u.lov;
139 if (lov->lov_page_removal_cb && lov->lov_page_removal_cb != func)
142 lov->lov_page_removal_cb = NULL;
143 lov->lov_page_pin_cb = NULL;
145 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
146 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
148 rc |= obd_unregister_page_removal_cb(lov->lov_tgts[i]->ltd_exp,
155 static int lov_register_lock_cancel_cb(struct obd_export *exp,
156 obd_lock_cancel_cb func)
158 struct lov_obd *lov = &exp->exp_obd->u.lov;
161 if (lov->lov_lock_cancel_cb && lov->lov_lock_cancel_cb != func)
164 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
165 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
167 rc |= obd_register_lock_cancel_cb(lov->lov_tgts[i]->ltd_exp,
171 lov->lov_lock_cancel_cb = func;
176 static int lov_unregister_lock_cancel_cb(struct obd_export *exp,
177 obd_lock_cancel_cb func)
179 struct lov_obd *lov = &exp->exp_obd->u.lov;
182 if (lov->lov_lock_cancel_cb && lov->lov_lock_cancel_cb != func)
185 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
186 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
188 rc |= obd_unregister_lock_cancel_cb(lov->lov_tgts[i]->ltd_exp,
191 lov->lov_lock_cancel_cb = NULL;
195 #define MAX_STRING_SIZE 128
196 static int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
197 struct obd_connect_data *data)
199 struct lov_obd *lov = &obd->u.lov;
200 struct obd_uuid tgt_uuid;
201 struct obd_device *tgt_obd;
202 struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
203 struct lustre_handle conn = {0, };
204 struct obd_import *imp;
207 cfs_proc_dir_entry_t *lov_proc_dir;
212 if (!lov->lov_tgts[index])
215 tgt_uuid = lov->lov_tgts[index]->ltd_uuid;
217 tgt_obd = class_find_client_obd(&tgt_uuid, LUSTRE_OSC_NAME,
221 CERROR("Target %s not attached\n", obd_uuid2str(&tgt_uuid));
224 if (!tgt_obd->obd_set_up) {
225 CERROR("Target %s not set up\n", obd_uuid2str(&tgt_uuid));
229 if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
230 data->ocd_index = index;
233 * Divine LOV knows that OBDs under it are OSCs.
235 imp = tgt_obd->u.cli.cl_import;
238 tgt_obd->obd_no_recov = 0;
239 /* FIXME this is probably supposed to be
240 ptlrpc_set_import_active. Horrible naming. */
241 ptlrpc_activate_import(imp);
244 if (imp->imp_invalid) {
245 CERROR("not connecting OSC %s; administratively "
246 "disabled\n", obd_uuid2str(&tgt_uuid));
247 rc = obd_register_observer(tgt_obd, obd);
249 CERROR("Target %s register_observer error %d; "
250 "will not be able to reactivate\n",
251 obd_uuid2str(&tgt_uuid), rc);
256 rc = obd_connect(NULL, &conn, tgt_obd, &lov_osc_uuid, data, NULL);
258 CERROR("Target %s connect error %d\n",
259 obd_uuid2str(&tgt_uuid), rc);
262 lov->lov_tgts[index]->ltd_exp = class_conn2export(&conn);
263 if (!lov->lov_tgts[index]->ltd_exp) {
264 CERROR("Target %s: null export!\n", obd_uuid2str(&tgt_uuid));
268 rc = obd_register_page_removal_cb(lov->lov_tgts[index]->ltd_exp,
269 lov->lov_page_removal_cb,
270 lov->lov_page_pin_cb);
272 obd_disconnect(lov->lov_tgts[index]->ltd_exp);
273 lov->lov_tgts[index]->ltd_exp = NULL;
277 rc = obd_register_lock_cancel_cb(lov->lov_tgts[index]->ltd_exp,
278 lov->lov_lock_cancel_cb);
280 obd_unregister_page_removal_cb(lov->lov_tgts[index]->ltd_exp,
281 lov->lov_page_removal_cb);
282 obd_disconnect(lov->lov_tgts[index]->ltd_exp);
283 lov->lov_tgts[index]->ltd_exp = NULL;
287 rc = obd_register_observer(tgt_obd, obd);
289 CERROR("Target %s register_observer error %d\n",
290 obd_uuid2str(&tgt_uuid), rc);
291 obd_unregister_lock_cancel_cb(lov->lov_tgts[index]->ltd_exp,
292 lov->lov_lock_cancel_cb);
293 obd_unregister_page_removal_cb(lov->lov_tgts[index]->ltd_exp,
294 lov->lov_page_removal_cb);
295 obd_disconnect(lov->lov_tgts[index]->ltd_exp);
296 lov->lov_tgts[index]->ltd_exp = NULL;
300 lov->lov_tgts[index]->ltd_reap = 0;
302 lov->lov_tgts[index]->ltd_active = 1;
303 lov->desc.ld_active_tgt_count++;
304 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
306 CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
307 obd_uuid2str(&tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
310 lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
312 struct obd_device *osc_obd = class_conn2obd(&conn);
313 cfs_proc_dir_entry_t *osc_symlink;
314 char name[MAX_STRING_SIZE];
316 LASSERT(osc_obd != NULL);
317 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
318 LASSERT(osc_obd->obd_type->typ_name != NULL);
319 snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
320 osc_obd->obd_type->typ_name,
322 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name, lov_proc_dir,
324 if (osc_symlink == NULL) {
325 CERROR("could not register LOV target "
326 "/proc/fs/lustre/%s/%s/target_obds/%s.",
327 obd->obd_type->typ_name, obd->obd_name,
329 lprocfs_remove(&lov_proc_dir);
334 rc = qos_add_tgt(obd, index);
336 CERROR("qos_add_tgt failed %d\n", rc);
341 static int lov_connect(const struct lu_env *env,
342 struct lustre_handle *conn, struct obd_device *obd,
343 struct obd_uuid *cluuid, struct obd_connect_data *data,
346 struct lov_obd *lov = &obd->u.lov;
347 struct lov_tgt_desc *tgt;
351 CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
353 rc = class_connect(conn, obd, cluuid);
357 /* Why should there ever be more than 1 connect? */
359 LASSERT(lov->lov_connects == 1);
361 memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
363 lov->lov_ocd = *data;
366 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
367 tgt = lov->lov_tgts[i];
368 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
370 /* Flags will be lowest common denominator */
371 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
373 CERROR("%s: lov connect tgt %d failed: %d\n",
374 obd->obd_name, i, rc);
383 static int lov_disconnect_obd(struct obd_device *obd, __u32 index)
385 cfs_proc_dir_entry_t *lov_proc_dir;
386 struct lov_obd *lov = &obd->u.lov;
387 struct obd_device *osc_obd;
392 if (lov->lov_tgts[index] == NULL)
395 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
396 CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
397 obd->obd_name, osc_obd->obd_name);
399 obd_unregister_lock_cancel_cb(lov->lov_tgts[index]->ltd_exp,
400 lov->lov_lock_cancel_cb);
401 obd_unregister_page_removal_cb(lov->lov_tgts[index]->ltd_exp,
402 lov->lov_page_removal_cb);
404 if (lov->lov_tgts[index]->ltd_active) {
405 lov->lov_tgts[index]->ltd_active = 0;
406 lov->desc.ld_active_tgt_count--;
407 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
410 lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
412 cfs_proc_dir_entry_t *osc_symlink;
414 osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name);
416 lprocfs_remove(&osc_symlink);
418 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing.",
419 obd->obd_type->typ_name, obd->obd_name,
425 /* Pass it on to our clients.
426 * XXX This should be an argument to disconnect,
427 * XXX not a back-door flag on the OBD. Ah well.
429 osc_obd->obd_force = obd->obd_force;
430 osc_obd->obd_fail = obd->obd_fail;
431 osc_obd->obd_no_recov = obd->obd_no_recov;
434 obd_register_observer(osc_obd, NULL);
436 rc = obd_disconnect(lov->lov_tgts[index]->ltd_exp);
438 CERROR("Target %s disconnect error %d\n",
439 lov_uuid2str(lov, index), rc);
443 qos_del_tgt(obd, index);
445 lov->lov_tgts[index]->ltd_exp = NULL;
449 static int lov_del_target(struct obd_device *obd, __u32 index,
450 struct obd_uuid *uuidp, int gen);
452 static int lov_disconnect(struct obd_export *exp)
454 struct obd_device *obd = class_exp2obd(exp);
455 struct lov_obd *lov = &obd->u.lov;
462 /* Only disconnect the underlying layers on the final disconnect. */
464 if (lov->lov_connects != 0) {
465 /* why should there be more than 1 connect? */
466 CERROR("disconnect #%d\n", lov->lov_connects);
470 /* Let's hold another reference so lov_del_obd doesn't spin through
473 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
474 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
475 /* Disconnection is the last we know about an obd */
476 lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
482 rc = class_disconnect(exp); /* bz 9811 */
488 * -EINVAL : UUID can't be found in the LOV's target list
489 * - any other is lov index
491 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
494 struct lov_obd *lov = &obd->u.lov;
495 struct lov_tgt_desc *tgt;
499 CDEBUG(D_INFO, "Searching in lov %p for uuid %s (activate=%d)\n",
500 lov, uuid->uuid, activate);
503 for (index = 0; index < lov->desc.ld_tgt_count; index++) {
504 tgt = lov->lov_tgts[index];
505 if (!tgt || !tgt->ltd_exp)
508 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
509 index, obd_uuid2str(&tgt->ltd_uuid),
510 tgt->ltd_exp->exp_handle.h_cookie);
511 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
515 if (index == lov->desc.ld_tgt_count)
516 GOTO(out, index = -EINVAL);
518 if (lov->lov_tgts[index]->ltd_active == activate) {
519 CDEBUG(D_INFO, "OSC %s already %sactive!\n", uuid->uuid,
520 activate ? "" : "in");
524 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n", obd_uuid2str(uuid),
525 activate ? "" : "in");
527 lov->lov_tgts[index]->ltd_active = activate;
530 lov->desc.ld_active_tgt_count++;
531 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
533 lov->desc.ld_active_tgt_count--;
534 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
536 /* remove any old qos penalty */
537 lov->lov_tgts[index]->ltd_qos.ltq_penalty = 0;
544 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
545 enum obd_notify_event ev, void *data)
550 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
551 struct obd_uuid *uuid;
555 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
556 CERROR("unexpected notification of %s %s!\n",
557 watched->obd_type->typ_name,
561 uuid = &watched->u.cli.cl_target_uuid;
563 /* Set OSC as active before notifying the observer, so the
564 * observer can use the OSC normally.
566 rc = lov_set_osc_active(obd, uuid, ev == OBD_NOTIFY_ACTIVE);
568 CERROR("%sactivation of %s failed: %d\n",
569 (ev == OBD_NOTIFY_ACTIVE) ? "" : "de",
570 obd_uuid2str(uuid), rc);
576 /* Pass the notification up the chain. */
578 rc = obd_notify_observer(obd, watched, ev, data);
580 /* NULL watched means all osc's in the lov (only for syncs) */
581 /* sync event should be send lov idx as data */
582 struct lov_obd *lov = &obd->u.lov;
583 struct obd_device *tgt_obd;
586 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
587 if (!lov->lov_tgts[i])
590 if ((ev == OBD_NOTIFY_SYNC) ||
591 (ev == OBD_NOTIFY_SYNC_NONBLOCK))
594 tgt_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
595 rc = obd_notify_observer(obd, tgt_obd, ev, data);
597 CERROR("%s: notify %s of %s failed %d\n",
599 obd->obd_observer->obd_name,
600 tgt_obd->obd_name, rc);
610 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
611 __u32 index, int gen, int active)
613 struct lov_obd *lov = &obd->u.lov;
614 struct lov_tgt_desc *tgt;
618 CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
619 uuidp->uuid, index, gen, active);
622 CERROR("request to add OBD %s with invalid generation: %d\n",
627 mutex_down(&lov->lov_lock);
629 if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
630 tgt = lov->lov_tgts[index];
631 CERROR("UUID %s already assigned at LOV target index %d\n",
632 obd_uuid2str(&tgt->ltd_uuid), index);
633 mutex_up(&lov->lov_lock);
637 if (index >= lov->lov_tgt_size) {
638 /* We need to reallocate the lov target array. */
639 struct lov_tgt_desc **newtgts, **old = NULL;
640 __u32 newsize, oldsize = 0;
642 newsize = max(lov->lov_tgt_size, (__u32)2);
643 while (newsize < index + 1)
644 newsize = newsize << 1;
645 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
646 if (newtgts == NULL) {
647 mutex_up(&lov->lov_lock);
651 if (lov->lov_tgt_size) {
652 memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
655 oldsize = lov->lov_tgt_size;
658 lov->lov_tgts = newtgts;
659 lov->lov_tgt_size = newsize;
664 OBD_FREE(old, sizeof(*old) * oldsize);
666 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
667 lov->lov_tgts, lov->lov_tgt_size);
672 mutex_up(&lov->lov_lock);
676 memset(tgt, 0, sizeof(*tgt));
677 tgt->ltd_uuid = *uuidp;
678 /* XXX - add a sanity check on the generation number. */
680 tgt->ltd_index = index;
681 tgt->ltd_activate = active;
682 lov->lov_tgts[index] = tgt;
683 if (index >= lov->desc.ld_tgt_count)
684 lov->desc.ld_tgt_count = index + 1;
686 rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
690 mutex_up(&lov->lov_lock);
692 CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
693 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
695 if (lov->lov_connects == 0) {
696 /* lov_connect hasn't been called yet. We'll do the
697 lov_connect_obd on this target when that fn first runs,
698 because we don't know the connect flags yet. */
704 rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
708 rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
709 active ? OBD_NOTIFY_ACTIVE : OBD_NOTIFY_INACTIVE,
714 CERROR("add failed (%d), deleting %s\n", rc,
715 obd_uuid2str(&tgt->ltd_uuid));
716 lov_del_target(obd, index, 0, 0);
722 /* Schedule a target for deletion */
723 static int lov_del_target(struct obd_device *obd, __u32 index,
724 struct obd_uuid *uuidp, int gen)
726 struct lov_obd *lov = &obd->u.lov;
727 int count = lov->desc.ld_tgt_count;
731 if (index >= count) {
732 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
739 if (!lov->lov_tgts[index]) {
740 CERROR("LOV target at index %d is not setup.\n", index);
741 GOTO(out, rc = -EINVAL);
744 if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
745 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
746 lov_uuid2str(lov, index), index,
747 obd_uuid2str(uuidp));
748 GOTO(out, rc = -EINVAL);
751 CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
752 lov_uuid2str(lov, index), index,
753 lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
754 lov->lov_tgts[index]->ltd_active);
756 lov->lov_tgts[index]->ltd_reap = 1;
757 lov->lov_death_row++;
758 /* we really delete it from lov_putref */
765 /* We are holding lov_lock */
766 static void __lov_del_obd(struct obd_device *obd, __u32 index)
768 struct lov_obd *lov = &obd->u.lov;
769 struct obd_device *osc_obd;
770 struct lov_tgt_desc *tgt = lov->lov_tgts[index];
773 LASSERT(tgt->ltd_reap);
775 osc_obd = class_exp2obd(tgt->ltd_exp);
777 CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
778 lov_uuid2str(lov, index),
779 osc_obd ? osc_obd->obd_name : "<no obd>");
782 lov_disconnect_obd(obd, index);
784 /* XXX - right now there is a dependency on ld_tgt_count being the
785 * maximum tgt index for computing the mds_max_easize. So we can't
788 lov_ost_pool_remove(&lov->lov_packed, index);
789 lov->lov_tgts[index] = NULL;
792 /* Manual cleanup - no cleanup logs to clean up the osc's. We must
793 do it ourselves. And we can't do it from lov_cleanup,
794 because we just lost our only reference to it. */
796 class_manual_cleanup(osc_obd);
799 void lov_fix_desc_stripe_size(__u64 *val)
801 if (*val < PTLRPC_MAX_BRW_SIZE) {
802 LCONSOLE_WARN("Increasing default stripe size to min %u\n",
803 PTLRPC_MAX_BRW_SIZE);
804 *val = PTLRPC_MAX_BRW_SIZE;
805 } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
806 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
807 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
809 *val, LOV_MIN_STRIPE_SIZE);
813 void lov_fix_desc_stripe_count(__u32 *val)
819 void lov_fix_desc_pattern(__u32 *val)
821 /* from lov_setstripe */
822 if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
823 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
828 void lov_fix_desc_qos_maxage(__u32 *val)
832 *val = QOS_DEFAULT_MAXAGE;
835 void lov_fix_desc(struct lov_desc *desc)
837 lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
838 lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
839 lov_fix_desc_pattern(&desc->ld_pattern);
840 lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
843 static int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
845 struct lprocfs_static_vars lvars = { 0 };
846 struct lov_desc *desc;
847 struct lov_obd *lov = &obd->u.lov;
852 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
853 CERROR("LOV setup requires a descriptor\n");
857 desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
859 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
860 CERROR("descriptor size wrong: %d > %d\n",
861 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
865 if (desc->ld_magic != LOV_DESC_MAGIC) {
866 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
867 CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
868 obd->obd_name, desc);
869 lustre_swab_lov_desc(desc);
871 CERROR("%s: Bad lov desc magic: %#x\n",
872 obd->obd_name, desc->ld_magic);
879 /* Because of 64-bit divide/mod operations only work with a 32-bit
880 * divisor in a 32-bit kernel, we cannot support a stripe width
881 * of 4GB or larger on 32-bit CPUs. */
882 count = desc->ld_default_stripe_count;
883 if ((count > 0 ? count : desc->ld_tgt_count) *
884 desc->ld_default_stripe_size > 0xffffffff) {
885 CERROR("LOV: stripe width "LPU64"x%u > 4294967295 bytes\n",
886 desc->ld_default_stripe_size, count);
890 desc->ld_active_tgt_count = 0;
892 lov->lov_tgt_size = 0;
894 sema_init(&lov->lov_lock, 1);
895 atomic_set(&lov->lov_refcount, 0);
896 CFS_INIT_LIST_HEAD(&lov->lov_qos.lq_oss_list);
897 init_rwsem(&lov->lov_qos.lq_rw_sem);
898 lov->lov_qos.lq_dirty = 1;
899 lov->lov_qos.lq_rr.lqr_dirty = 1;
900 lov->lov_qos.lq_reset = 1;
901 /* Default priority is toward free space balance */
902 lov->lov_qos.lq_prio_free = 232;
904 lov->lov_pools_hash_body = lustre_hash_init("POOLS", 128, 128,
905 &pool_hash_operations, 0);
906 CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
907 lov->lov_pool_count = 0;
908 rc = lov_ost_pool_init(&lov->lov_packed, 0);
911 rc = lov_ost_pool_init(&lov->lov_qos.lq_rr.lqr_pool, 0);
913 lov_ost_pool_free(&lov->lov_packed);
917 lprocfs_lov_init_vars(&lvars);
918 lprocfs_obd_setup(obd, lvars.obd_vars);
923 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
924 0444, &lov_proc_target_fops, obd);
926 CWARN("Error adding the target_obd file\n");
929 lov->lov_pool_proc_entry = lprocfs_register("pools",
936 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
942 case OBD_CLEANUP_EARLY: {
943 struct lov_obd *lov = &obd->u.lov;
945 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
946 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
948 obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
953 case OBD_CLEANUP_EXPORTS:
954 rc = obd_llog_finish(obd, 0);
956 CERROR("failed to cleanup llogging subsystems\n");
962 static int lov_cleanup(struct obd_device *obd)
964 struct lov_obd *lov = &obd->u.lov;
965 struct list_head *pos, *tmp;
966 struct pool_desc *pool;
968 lprocfs_obd_cleanup(obd);
970 list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
971 pool = list_entry(pos, struct pool_desc, pool_list);
972 list_del(&pool->pool_list);
973 lov_ost_pool_free(&(pool->pool_rr.lqr_pool));
974 lov_ost_pool_free(&(pool->pool_obds));
977 lov_ost_pool_free(&(lov->lov_qos.lq_rr.lqr_pool));
978 lov_ost_pool_free(&lov->lov_packed);
979 lustre_hash_exit(lov->lov_pools_hash_body);
983 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
984 if (!lov->lov_tgts[i])
987 /* Inactive targets may never have connected */
988 if (lov->lov_tgts[i]->ltd_active ||
989 atomic_read(&lov->lov_refcount))
990 /* We should never get here - these
991 should have been removed in the
993 CERROR("lov tgt %d not cleaned!"
994 " deathrow=%d, lovrc=%d\n",
995 i, lov->lov_death_row,
996 atomic_read(&lov->lov_refcount));
997 lov_del_target(obd, i, 0, 0);
999 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
1001 lov->lov_tgt_size = 0;
1007 static int lov_process_config(struct obd_device *obd, obd_count len, void *buf)
1009 struct lustre_cfg *lcfg = buf;
1010 struct obd_uuid obd_uuid;
1015 switch(cmd = lcfg->lcfg_command) {
1016 case LCFG_LOV_ADD_OBD:
1017 case LCFG_LOV_ADD_INA:
1018 case LCFG_LOV_DEL_OBD: {
1021 /* lov_modify_tgts add 0:lov_mdsA 1:ost1_UUID 2:0 3:1 */
1022 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1023 GOTO(out, rc = -EINVAL);
1025 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
1027 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
1028 GOTO(out, rc = -EINVAL);
1029 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1030 GOTO(out, rc = -EINVAL);
1031 if (cmd == LCFG_LOV_ADD_OBD)
1032 rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
1033 else if (cmd == LCFG_LOV_ADD_INA)
1034 rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
1036 rc = lov_del_target(obd, index, &obd_uuid, gen);
1040 struct lprocfs_static_vars lvars = { 0 };
1041 struct lov_desc *desc = &(obd->u.lov.desc);
1044 GOTO(out, rc = -EINVAL);
1046 lprocfs_lov_init_vars(&lvars);
1048 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
1059 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1060 GOTO(out, rc = -EINVAL);
1069 #define log2(n) ffz(~(n))
1072 static int lov_clear_orphans(struct obd_export *export, struct obdo *src_oa,
1073 struct lov_stripe_md **ea,
1074 struct obd_trans_info *oti)
1076 struct lov_obd *lov;
1077 struct obdo *tmp_oa;
1078 struct obd_uuid *ost_uuid = NULL;
1082 LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1083 src_oa->o_flags == OBD_FL_DELORPHAN);
1085 lov = &export->exp_obd->u.lov;
1091 if (oti->oti_ost_uuid) {
1092 ost_uuid = oti->oti_ost_uuid;
1093 CDEBUG(D_HA, "clearing orphans only for %s\n",
1097 lov_getref(export->exp_obd);
1098 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1099 struct lov_stripe_md obj_md;
1100 struct lov_stripe_md *obj_mdp = &obj_md;
1101 struct lov_tgt_desc *tgt;
1104 tgt = lov->lov_tgts[i];
1108 /* if called for a specific target, we don't
1109 care if it is not active. */
1110 if (!lov->lov_tgts[i]->ltd_active && ost_uuid == NULL) {
1111 CDEBUG(D_HA, "lov idx %d inactive\n", i);
1115 if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->ltd_uuid))
1118 CDEBUG(D_CONFIG,"Clear orphans for %d:%s\n", i,
1119 obd_uuid2str(ost_uuid));
1121 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1123 LASSERT(lov->lov_tgts[i]->ltd_exp);
1124 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1125 err = obd_create(lov->lov_tgts[i]->ltd_exp,
1126 tmp_oa, &obj_mdp, oti);
1128 /* This export will be disabled until it is recovered,
1129 and then orphan recovery will be completed. */
1130 CERROR("error in orphan recovery on OST idx %d/%d: "
1131 "rc = %d\n", i, lov->desc.ld_tgt_count, err);
1136 lov_putref(export->exp_obd);
1142 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
1143 struct lov_stripe_md **ea, struct obd_trans_info *oti)
1145 struct lov_stripe_md *obj_mdp, *lsm;
1146 struct lov_obd *lov = &exp->exp_obd->u.lov;
1151 LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1152 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1154 OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1155 if (obj_mdp == NULL)
1158 ost_idx = src_oa->o_nlink;
1161 GOTO(out, rc = -EINVAL);
1162 if (ost_idx >= lov->desc.ld_tgt_count ||
1163 !lov->lov_tgts[ost_idx])
1164 GOTO(out, rc = -EINVAL);
1166 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1167 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1168 if (lsm->lsm_oinfo[i]->loi_id != src_oa->o_id)
1169 GOTO(out, rc = -EINVAL);
1173 if (i == lsm->lsm_stripe_count)
1174 GOTO(out, rc = -EINVAL);
1176 rc = obd_create(lov->lov_tgts[ost_idx]->ltd_exp, src_oa, &obj_mdp, oti);
1178 OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1182 /* the LOV expects oa->o_id to be set to the LOV object id */
1183 static int lov_create(struct obd_export *exp, struct obdo *src_oa,
1184 struct lov_stripe_md **ea, struct obd_trans_info *oti)
1186 struct lov_obd *lov;
1187 struct obd_info oinfo;
1188 struct lov_request_set *set = NULL;
1189 struct lov_request *req;
1190 struct obd_statfs osfs;
1195 LASSERT(ea != NULL);
1199 if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1200 src_oa->o_flags == OBD_FL_DELORPHAN) {
1201 rc = lov_clear_orphans(exp, src_oa, ea, oti);
1205 lov = &exp->exp_obd->u.lov;
1206 if (!lov->desc.ld_active_tgt_count)
1209 /* Recreate a specific object id at the given OST index */
1210 if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1211 (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1212 rc = lov_recreate(exp, src_oa, ea, oti);
1216 maxage = cfs_time_shift_64(-lov->desc.ld_qos_maxage);
1217 obd_statfs_rqset(exp->exp_obd, &osfs, maxage, OBD_STATFS_NODELAY);
1219 rc = lov_prep_create_set(exp, &oinfo, ea, src_oa, oti, &set);
1223 list_for_each_entry(req, &set->set_list, rq_link) {
1224 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1225 rc = obd_create(lov->lov_tgts[req->rq_idx]->ltd_exp,
1226 req->rq_oi.oi_oa, &req->rq_oi.oi_md, oti);
1227 lov_update_create_set(set, req, rc);
1229 rc = lov_fini_create_set(set, ea);
1233 #define ASSERT_LSM_MAGIC(lsmp) \
1235 LASSERT((lsmp) != NULL); \
1236 LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 || \
1237 (lsmp)->lsm_magic == LOV_MAGIC_V3 || \
1238 (lsmp)->lsm_magic == LOV_MAGIC_JOIN), "%p->lsm_magic=%x\n", \
1239 (lsmp), (lsmp)->lsm_magic); \
1242 static int lov_destroy(struct obd_export *exp, struct obdo *oa,
1243 struct lov_stripe_md *lsm, struct obd_trans_info *oti,
1244 struct obd_export *md_exp)
1246 struct lov_request_set *set;
1247 struct obd_info oinfo;
1248 struct lov_request *req;
1249 struct list_head *pos;
1250 struct lov_obd *lov;
1254 ASSERT_LSM_MAGIC(lsm);
1256 if (!exp || !exp->exp_obd)
1259 if (oa->o_valid & OBD_MD_FLCOOKIE) {
1261 LASSERT(oti->oti_logcookies);
1264 lov = &exp->exp_obd->u.lov;
1265 rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1269 list_for_each (pos, &set->set_list) {
1271 req = list_entry(pos, struct lov_request, rq_link);
1273 if (oa->o_valid & OBD_MD_FLCOOKIE)
1274 oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1276 err = obd_destroy(lov->lov_tgts[req->rq_idx]->ltd_exp,
1277 req->rq_oi.oi_oa, NULL, oti, NULL);
1278 err = lov_update_common_set(set, req, err);
1280 CERROR("error: destroying objid "LPX64" subobj "
1281 LPX64" on OST idx %d: rc = %d\n",
1282 oa->o_id, req->rq_oi.oi_oa->o_id,
1290 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1291 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1293 err = lov_fini_destroy_set(set);
1294 RETURN(rc ? rc : err);
1297 static int lov_getattr(struct obd_export *exp, struct obd_info *oinfo)
1299 struct lov_request_set *set;
1300 struct lov_request *req;
1301 struct list_head *pos;
1302 struct lov_obd *lov;
1303 int err = 0, rc = 0;
1307 ASSERT_LSM_MAGIC(oinfo->oi_md);
1309 if (!exp || !exp->exp_obd)
1312 lov = &exp->exp_obd->u.lov;
1314 rc = lov_prep_getattr_set(exp, oinfo, &set);
1318 list_for_each (pos, &set->set_list) {
1319 req = list_entry(pos, struct lov_request, rq_link);
1321 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1322 "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1323 req->rq_oi.oi_oa->o_id, req->rq_idx);
1325 rc = obd_getattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1327 err = lov_update_common_set(set, req, rc);
1329 CERROR("error: getattr objid "LPX64" subobj "
1330 LPX64" on OST idx %d: rc = %d\n",
1331 oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1337 rc = lov_fini_getattr_set(set);
1343 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1346 struct lov_request_set *lovset = (struct lov_request_set *)data;
1350 /* don't do attribute merge if this aysnc op failed */
1352 lovset->set_completes = 0;
1353 err = lov_fini_getattr_set(lovset);
1354 RETURN(rc ? rc : err);
1357 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1358 struct ptlrpc_request_set *rqset)
1360 struct lov_request_set *lovset;
1361 struct lov_obd *lov;
1362 struct list_head *pos;
1363 struct lov_request *req;
1368 ASSERT_LSM_MAGIC(oinfo->oi_md);
1370 if (!exp || !exp->exp_obd)
1373 lov = &exp->exp_obd->u.lov;
1375 rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1379 CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1380 oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1381 oinfo->oi_md->lsm_stripe_size);
1383 list_for_each (pos, &lovset->set_list) {
1384 req = list_entry(pos, struct lov_request, rq_link);
1386 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1387 "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1388 req->rq_oi.oi_oa->o_id, req->rq_idx);
1389 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1390 &req->rq_oi, rqset);
1392 CERROR("error: getattr objid "LPX64" subobj "
1393 LPX64" on OST idx %d: rc = %d\n",
1394 oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1400 if (!list_empty(&rqset->set_requests)) {
1402 LASSERT (rqset->set_interpret == NULL);
1403 rqset->set_interpret = lov_getattr_interpret;
1404 rqset->set_arg = (void *)lovset;
1409 lovset->set_completes = 0;
1410 err = lov_fini_getattr_set(lovset);
1411 RETURN(rc ? rc : err);
1414 static int lov_setattr(struct obd_export *exp, struct obd_info *oinfo,
1415 struct obd_trans_info *oti)
1417 struct lov_request_set *set;
1418 struct lov_obd *lov;
1419 struct list_head *pos;
1420 struct lov_request *req;
1421 int err = 0, rc = 0;
1425 ASSERT_LSM_MAGIC(oinfo->oi_md);
1427 if (!exp || !exp->exp_obd)
1430 /* for now, we only expect the following updates here */
1431 LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1432 OBD_MD_FLMODE | OBD_MD_FLATIME |
1433 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1434 OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1435 OBD_MD_FLGROUP | OBD_MD_FLUID |
1436 OBD_MD_FLGID | OBD_MD_FLFID |
1438 lov = &exp->exp_obd->u.lov;
1439 rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1443 list_for_each (pos, &set->set_list) {
1444 req = list_entry(pos, struct lov_request, rq_link);
1446 rc = obd_setattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1448 err = lov_update_setattr_set(set, req, rc);
1450 CERROR("error: setattr objid "LPX64" subobj "
1451 LPX64" on OST idx %d: rc = %d\n",
1452 set->set_oi->oi_oa->o_id,
1453 req->rq_oi.oi_oa->o_id, req->rq_idx, err);
1458 err = lov_fini_setattr_set(set);
1464 static int lov_setattr_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_setattr_set(lovset);
1474 RETURN(rc ? rc : err);
1477 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1478 needed. Otherwise, a client is waiting for responses. */
1479 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1480 struct obd_trans_info *oti,
1481 struct ptlrpc_request_set *rqset)
1483 struct lov_request_set *set;
1484 struct lov_request *req;
1485 struct list_head *pos;
1486 struct lov_obd *lov;
1491 ASSERT_LSM_MAGIC(oinfo->oi_md);
1492 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1494 LASSERT(oti->oti_logcookies);
1497 if (!exp || !exp->exp_obd)
1500 lov = &exp->exp_obd->u.lov;
1501 rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1505 CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1506 oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1507 oinfo->oi_md->lsm_stripe_size);
1509 list_for_each (pos, &set->set_list) {
1510 req = list_entry(pos, struct lov_request, rq_link);
1512 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1513 oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1515 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1516 "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1517 req->rq_oi.oi_oa->o_id, req->rq_idx);
1519 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1520 &req->rq_oi, oti, rqset);
1522 CERROR("error: setattr objid "LPX64" subobj "
1523 LPX64" on OST idx %d: rc = %d\n",
1524 set->set_oi->oi_oa->o_id,
1525 req->rq_oi.oi_oa->o_id,
1531 /* If we are not waiting for responses on async requests, return. */
1532 if (rc || !rqset || list_empty(&rqset->set_requests)) {
1535 set->set_completes = 0;
1536 err = lov_fini_setattr_set(set);
1537 RETURN(rc ? rc : err);
1540 LASSERT(rqset->set_interpret == NULL);
1541 rqset->set_interpret = lov_setattr_interpret;
1542 rqset->set_arg = (void *)set;
1547 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1550 struct lov_request_set *lovset = (struct lov_request_set *)data;
1555 lovset->set_completes = 0;
1556 err = lov_fini_punch_set(lovset);
1557 RETURN(rc ? rc : err);
1560 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1561 * we can send this 'punch' to just the authoritative node and the nodes
1562 * that the punch will affect. */
1563 static int lov_punch(struct obd_export *exp, struct obd_info *oinfo,
1564 struct obd_trans_info *oti,
1565 struct ptlrpc_request_set *rqset)
1567 struct lov_request_set *set;
1568 struct lov_obd *lov;
1569 struct list_head *pos;
1570 struct lov_request *req;
1575 ASSERT_LSM_MAGIC(oinfo->oi_md);
1577 if (!exp || !exp->exp_obd)
1580 lov = &exp->exp_obd->u.lov;
1581 rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1585 list_for_each (pos, &set->set_list) {
1586 req = list_entry(pos, struct lov_request, rq_link);
1588 rc = obd_punch(lov->lov_tgts[req->rq_idx]->ltd_exp,
1589 &req->rq_oi, NULL, rqset);
1591 CERROR("error: punch objid "LPX64" subobj "LPX64
1592 " on OST idx %d: rc = %d\n",
1593 set->set_oi->oi_oa->o_id,
1594 req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1599 if (rc || list_empty(&rqset->set_requests)) {
1601 err = lov_fini_punch_set(set);
1602 RETURN(rc ? rc : err);
1605 LASSERT(rqset->set_interpret == NULL);
1606 rqset->set_interpret = lov_punch_interpret;
1607 rqset->set_arg = (void *)set;
1612 static int lov_sync(struct obd_export *exp, struct obdo *oa,
1613 struct lov_stripe_md *lsm, obd_off start, obd_off end,
1616 struct lov_request_set *set;
1617 struct obd_info oinfo;
1618 struct lov_obd *lov;
1619 struct list_head *pos;
1620 struct lov_request *req;
1621 int err = 0, rc = 0;
1624 ASSERT_LSM_MAGIC(lsm);
1629 lov = &exp->exp_obd->u.lov;
1630 rc = lov_prep_sync_set(exp, &oinfo, oa, lsm, start, end, &set);
1634 list_for_each (pos, &set->set_list) {
1635 req = list_entry(pos, struct lov_request, rq_link);
1637 rc = obd_sync(lov->lov_tgts[req->rq_idx]->ltd_exp,
1638 req->rq_oi.oi_oa, NULL,
1639 req->rq_oi.oi_policy.l_extent.start,
1640 req->rq_oi.oi_policy.l_extent.end, capa);
1641 err = lov_update_common_set(set, req, rc);
1643 CERROR("error: fsync objid "LPX64" subobj "LPX64
1644 " on OST idx %d: rc = %d\n",
1645 set->set_oi->oi_oa->o_id,
1646 req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1651 err = lov_fini_sync_set(set);
1657 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1658 obd_count oa_bufs, struct brw_page *pga)
1660 struct obd_info oinfo = { { { 0 } } };
1663 oinfo.oi_oa = lov_oinfo->oi_oa;
1665 /* The caller just wants to know if there's a chance that this
1666 * I/O can succeed */
1667 for (i = 0; i < oa_bufs; i++) {
1668 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1669 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1672 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1673 pga[i].off + pga[i].count,
1677 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1678 CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1682 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1690 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1691 obd_count oa_bufs, struct brw_page *pga,
1692 struct obd_trans_info *oti)
1694 struct lov_request_set *set;
1695 struct lov_request *req;
1696 struct list_head *pos;
1697 struct lov_obd *lov = &exp->exp_obd->u.lov;
1701 ASSERT_LSM_MAGIC(oinfo->oi_md);
1703 if (cmd == OBD_BRW_CHECK) {
1704 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1708 rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1712 list_for_each (pos, &set->set_list) {
1713 struct obd_export *sub_exp;
1714 struct brw_page *sub_pga;
1715 req = list_entry(pos, struct lov_request, rq_link);
1717 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1718 sub_pga = set->set_pga + req->rq_pgaidx;
1719 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1723 lov_update_common_set(set, req, rc);
1726 err = lov_fini_brw_set(set);
1732 static int lov_brw_interpret(struct ptlrpc_request_set *reqset, void *data,
1735 struct lov_request_set *lovset = (struct lov_request_set *)data;
1739 lovset->set_completes = 0;
1740 lov_fini_brw_set(lovset);
1742 rc = lov_fini_brw_set(lovset);
1748 static int lov_brw_async(int cmd, struct obd_export *exp,
1749 struct obd_info *oinfo, obd_count oa_bufs,
1750 struct brw_page *pga, struct obd_trans_info *oti,
1751 struct ptlrpc_request_set *set)
1753 struct lov_request_set *lovset;
1754 struct lov_request *req;
1755 struct list_head *pos;
1756 struct lov_obd *lov = &exp->exp_obd->u.lov;
1761 ASSERT_LSM_MAGIC(oinfo->oi_md);
1763 if (cmd == OBD_BRW_CHECK) {
1764 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1768 rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &lovset);
1772 list_for_each (pos, &lovset->set_list) {
1773 struct obd_export *sub_exp;
1774 struct brw_page *sub_pga;
1775 req = list_entry(pos, struct lov_request, rq_link);
1777 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1778 sub_pga = lovset->set_pga + req->rq_pgaidx;
1779 rc = obd_brw_async(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1783 lov_update_common_set(lovset, req, rc);
1786 LASSERT(set->set_interpret == NULL);
1787 LASSERT(set->set_arg == NULL);
1788 rc = ptlrpc_set_add_cb(set, lov_brw_interpret, lovset);
1794 lov_fini_brw_set(lovset);
1798 static int lov_ap_make_ready(void *data, int cmd)
1800 struct lov_async_page *lap = lap_from_cookie(data);
1802 return lap->lap_caller_ops->ap_make_ready(lap->lap_caller_data, cmd);
1805 static int lov_ap_refresh_count(void *data, int cmd)
1807 struct lov_async_page *lap = lap_from_cookie(data);
1809 return lap->lap_caller_ops->ap_refresh_count(lap->lap_caller_data,
1813 static void lov_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
1815 struct lov_async_page *lap = lap_from_cookie(data);
1817 lap->lap_caller_ops->ap_fill_obdo(lap->lap_caller_data, cmd, oa);
1818 /* XXX woah, shouldn't we be altering more here? size? */
1819 oa->o_id = lap->lap_loi_id;
1820 oa->o_gr = lap->lap_loi_gr;
1821 oa->o_valid |= OBD_MD_FLGROUP;
1822 oa->o_stripe_idx = lap->lap_stripe;
1825 static void lov_ap_update_obdo(void *data, int cmd, struct obdo *oa,
1828 struct lov_async_page *lap = lap_from_cookie(data);
1830 lap->lap_caller_ops->ap_update_obdo(lap->lap_caller_data, cmd,oa,valid);
1833 static int lov_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
1835 struct lov_async_page *lap = lap_from_cookie(data);
1837 /* in a raid1 regime this would down a count of many ios
1838 * in flight, onl calling the caller_ops completion when all
1839 * the raid1 ios are complete */
1840 rc = lap->lap_caller_ops->ap_completion(lap->lap_caller_data,cmd,oa,rc);
1844 static struct obd_capa *lov_ap_lookup_capa(void *data, int cmd)
1846 struct lov_async_page *lap = lap_from_cookie(data);
1847 return lap->lap_caller_ops->ap_lookup_capa(lap->lap_caller_data, cmd);
1850 static struct obd_async_page_ops lov_async_page_ops = {
1851 .ap_make_ready = lov_ap_make_ready,
1852 .ap_refresh_count = lov_ap_refresh_count,
1853 .ap_fill_obdo = lov_ap_fill_obdo,
1854 .ap_update_obdo = lov_ap_update_obdo,
1855 .ap_completion = lov_ap_completion,
1856 .ap_lookup_capa = lov_ap_lookup_capa,
1859 int lov_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
1860 struct lov_oinfo *loi, cfs_page_t *page,
1861 obd_off offset, struct obd_async_page_ops *ops,
1862 void *data, void **res, int nocache,
1863 struct lustre_handle *lockh)
1865 struct lov_obd *lov = &exp->exp_obd->u.lov;
1866 struct lov_async_page *lap;
1867 struct lov_lock_handles *lov_lockh = NULL;
1873 /* Find an existing osc so we can get it's stupid sizeof(*oap).
1874 Only because of this layering limitation will a client
1875 mount with no osts fail */
1876 while (!lov->lov_tgts || !lov->lov_tgts[i] ||
1877 !lov->lov_tgts[i]->ltd_exp) {
1879 if (i >= lov->desc.ld_tgt_count)
1882 rc = size_round(sizeof(*lap)) +
1883 obd_prep_async_page(lov->lov_tgts[i]->ltd_exp, NULL,
1884 NULL, NULL, 0, NULL, NULL, NULL, 0,
1888 ASSERT_LSM_MAGIC(lsm);
1889 LASSERT(loi == NULL);
1892 lap->lap_magic = LOV_AP_MAGIC;
1893 lap->lap_caller_ops = ops;
1894 lap->lap_caller_data = data;
1896 /* for now only raid 0 which passes through */
1897 lap->lap_stripe = lov_stripe_number(lsm, offset);
1898 lov_stripe_offset(lsm, offset, lap->lap_stripe, &lap->lap_sub_offset);
1899 loi = lsm->lsm_oinfo[lap->lap_stripe];
1901 /* so the callback doesn't need the lsm */
1902 lap->lap_loi_id = loi->loi_id;
1903 lap->lap_loi_gr = lsm->lsm_object_gr;
1904 LASSERT(lsm->lsm_object_gr > 0);
1906 lap->lap_sub_cookie = (void *)lap + size_round(sizeof(*lap));
1909 lov_lockh = lov_handle2llh(lockh);
1911 lockh = lov_lockh->llh_handles + lap->lap_stripe;
1915 rc = obd_prep_async_page(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1916 lsm, loi, page, lap->lap_sub_offset,
1917 &lov_async_page_ops, lap,
1918 &lap->lap_sub_cookie, nocache, lockh);
1920 lov_llh_put(lov_lockh);
1923 CDEBUG(D_CACHE, "lap %p page %p cookie %p off "LPU64"\n", lap, page,
1924 lap->lap_sub_cookie, offset);
1928 static int lov_queue_async_io(struct obd_export *exp,
1929 struct lov_stripe_md *lsm,
1930 struct lov_oinfo *loi, void *cookie,
1931 int cmd, obd_off off, int count,
1932 obd_flag brw_flags, obd_flag async_flags)
1934 struct lov_obd *lov = &exp->exp_obd->u.lov;
1935 struct lov_async_page *lap;
1938 LASSERT(loi == NULL);
1940 ASSERT_LSM_MAGIC(lsm);
1942 lap = lap_from_cookie(cookie);
1944 loi = lsm->lsm_oinfo[lap->lap_stripe];
1946 rc = obd_queue_async_io(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, lsm,
1947 loi, lap->lap_sub_cookie, cmd, off, count,
1948 brw_flags, async_flags);
1952 static int lov_set_async_flags(struct obd_export *exp,
1953 struct lov_stripe_md *lsm,
1954 struct lov_oinfo *loi, void *cookie,
1955 obd_flag async_flags)
1957 struct lov_obd *lov = &exp->exp_obd->u.lov;
1958 struct lov_async_page *lap;
1961 LASSERT(loi == NULL);
1963 ASSERT_LSM_MAGIC(lsm);
1965 lap = lap_from_cookie(cookie);
1967 loi = lsm->lsm_oinfo[lap->lap_stripe];
1969 rc = obd_set_async_flags(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1970 lsm, loi, lap->lap_sub_cookie, async_flags);
1974 static int lov_queue_group_io(struct obd_export *exp,
1975 struct lov_stripe_md *lsm,
1976 struct lov_oinfo *loi,
1977 struct obd_io_group *oig, void *cookie,
1978 int cmd, obd_off off, int count,
1979 obd_flag brw_flags, obd_flag async_flags)
1981 struct lov_obd *lov = &exp->exp_obd->u.lov;
1982 struct lov_async_page *lap;
1985 LASSERT(loi == NULL);
1987 ASSERT_LSM_MAGIC(lsm);
1989 lap = lap_from_cookie(cookie);
1991 loi = lsm->lsm_oinfo[lap->lap_stripe];
1993 rc = obd_queue_group_io(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, lsm,
1994 loi, oig, lap->lap_sub_cookie, cmd, off, count,
1995 brw_flags, async_flags);
1999 /* this isn't exactly optimal. we may have queued sync io in oscs on
2000 * all stripes, but we don't record that fact at queue time. so we
2001 * trigger sync io on all stripes. */
2002 static int lov_trigger_group_io(struct obd_export *exp,
2003 struct lov_stripe_md *lsm,
2004 struct lov_oinfo *loi,
2005 struct obd_io_group *oig)
2007 struct lov_obd *lov = &exp->exp_obd->u.lov;
2010 LASSERT(loi == NULL);
2012 ASSERT_LSM_MAGIC(lsm);
2014 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2015 loi = lsm->lsm_oinfo[i];
2016 if (!lov->lov_tgts[loi->loi_ost_idx] ||
2017 !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
2018 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
2022 err = obd_trigger_group_io(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
2024 if (rc == 0 && err != 0)
2030 static int lov_teardown_async_page(struct obd_export *exp,
2031 struct lov_stripe_md *lsm,
2032 struct lov_oinfo *loi, void *cookie)
2034 struct lov_obd *lov = &exp->exp_obd->u.lov;
2035 struct lov_async_page *lap;
2038 LASSERT(loi == NULL);
2040 ASSERT_LSM_MAGIC(lsm);
2042 lap = lap_from_cookie(cookie);
2044 loi = lsm->lsm_oinfo[lap->lap_stripe];
2046 rc = obd_teardown_async_page(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
2047 lsm, loi, lap->lap_sub_cookie);
2049 CERROR("unable to teardown sub cookie %p: %d\n",
2050 lap->lap_sub_cookie, rc);
2056 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
2059 struct lov_request_set *lovset = (struct lov_request_set *)data;
2061 rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
2065 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
2066 struct ldlm_enqueue_info *einfo,
2067 struct ptlrpc_request_set *rqset)
2069 ldlm_mode_t mode = einfo->ei_mode;
2070 struct lov_request_set *set;
2071 struct lov_request *req;
2072 struct list_head *pos;
2073 struct lov_obd *lov;
2078 ASSERT_LSM_MAGIC(oinfo->oi_md);
2079 LASSERT(mode == (mode & -mode));
2081 /* we should never be asked to replay a lock this way. */
2082 LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
2084 if (!exp || !exp->exp_obd)
2087 lov = &exp->exp_obd->u.lov;
2088 rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
2092 list_for_each (pos, &set->set_list) {
2093 req = list_entry(pos, struct lov_request, rq_link);
2095 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
2096 &req->rq_oi, einfo, rqset);
2101 if (rqset && !list_empty(&rqset->set_requests)) {
2103 LASSERT(rqset->set_interpret == NULL);
2104 rqset->set_interpret = lov_enqueue_interpret;
2105 rqset->set_arg = (void *)set;
2109 rc = lov_fini_enqueue_set(set, mode, rc, rqset);
2113 static int lov_match(struct obd_export *exp, struct lov_stripe_md *lsm,
2114 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
2115 int *flags, void *data, struct lustre_handle *lockh)
2117 struct lov_request_set *set;
2118 struct obd_info oinfo;
2119 struct lov_request *req;
2120 struct list_head *pos;
2121 struct lov_obd *lov = &exp->exp_obd->u.lov;
2122 struct lustre_handle *lov_lockhp;
2123 int lov_flags, rc = 0;
2126 ASSERT_LSM_MAGIC(lsm);
2127 LASSERT((*flags & LDLM_FL_TEST_LOCK) || mode == (mode & -mode));
2129 if (!exp || !exp->exp_obd)
2132 lov = &exp->exp_obd->u.lov;
2133 rc = lov_prep_match_set(exp, &oinfo, lsm, policy, mode, lockh, &set);
2137 list_for_each (pos, &set->set_list) {
2138 ldlm_policy_data_t sub_policy;
2139 req = list_entry(pos, struct lov_request, rq_link);
2140 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
2141 LASSERT(lov_lockhp);
2144 sub_policy.l_extent = req->rq_oi.oi_policy.l_extent;
2146 rc = obd_match(lov->lov_tgts[req->rq_idx]->ltd_exp,
2147 req->rq_oi.oi_md, type, &sub_policy,
2148 mode, &lov_flags, data, lov_lockhp);
2149 rc = lov_update_match_set(set, req, rc);
2153 lov_fini_match_set(set, mode, *flags);
2157 static int lov_change_cbdata(struct obd_export *exp,
2158 struct lov_stripe_md *lsm, ldlm_iterator_t it,
2161 struct lov_obd *lov;
2165 ASSERT_LSM_MAGIC(lsm);
2167 if (!exp || !exp->exp_obd)
2170 LASSERT(lsm->lsm_object_gr > 0);
2172 lov = &exp->exp_obd->u.lov;
2173 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2174 struct lov_stripe_md submd;
2175 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2177 if (!lov->lov_tgts[loi->loi_ost_idx]) {
2178 CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
2182 submd.lsm_object_id = loi->loi_id;
2183 submd.lsm_object_gr = lsm->lsm_object_gr;
2184 submd.lsm_stripe_count = 0;
2185 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
2191 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
2192 __u32 mode, struct lustre_handle *lockh)
2194 struct lov_request_set *set;
2195 struct obd_info oinfo;
2196 struct lov_request *req;
2197 struct list_head *pos;
2198 struct lov_obd *lov = &exp->exp_obd->u.lov;
2199 struct lustre_handle *lov_lockhp;
2200 int err = 0, rc = 0;
2203 ASSERT_LSM_MAGIC(lsm);
2205 if (!exp || !exp->exp_obd)
2208 LASSERT(lsm->lsm_object_gr > 0);
2210 lov = &exp->exp_obd->u.lov;
2211 rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
2215 list_for_each (pos, &set->set_list) {
2216 req = list_entry(pos, struct lov_request, rq_link);
2217 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
2219 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
2220 req->rq_oi.oi_md, mode, lov_lockhp);
2221 rc = lov_update_common_set(set, req, rc);
2223 CERROR("error: cancel objid "LPX64" subobj "
2224 LPX64" on OST idx %d: rc = %d\n",
2226 req->rq_oi.oi_md->lsm_object_id,
2232 lov_fini_cancel_set(set);
2236 static int lov_cancel_unused(struct obd_export *exp,
2237 struct lov_stripe_md *lsm,
2238 int flags, void *opaque)
2240 struct lov_obd *lov;
2244 if (!exp || !exp->exp_obd)
2247 lov = &exp->exp_obd->u.lov;
2249 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2251 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2254 err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
2262 ASSERT_LSM_MAGIC(lsm);
2264 LASSERT(lsm->lsm_object_gr > 0);
2265 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2266 struct lov_stripe_md submd;
2267 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2270 if (!lov->lov_tgts[loi->loi_ost_idx]) {
2271 CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
2275 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
2276 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
2278 submd.lsm_object_id = loi->loi_id;
2279 submd.lsm_object_gr = lsm->lsm_object_gr;
2280 submd.lsm_stripe_count = 0;
2281 err = obd_cancel_unused(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
2282 &submd, flags, opaque);
2283 if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
2284 CERROR("error: cancel unused objid "LPX64" subobj "LPX64
2285 " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
2286 loi->loi_id, loi->loi_ost_idx, err);
2294 static int lov_join_lru(struct obd_export *exp,
2295 struct lov_stripe_md *lsm, int join)
2297 struct lov_obd *lov;
2301 ASSERT_LSM_MAGIC(lsm);
2302 if (!exp || !exp->exp_obd)
2305 lov = &exp->exp_obd->u.lov;
2306 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2307 struct lov_stripe_md submd;
2308 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2311 if (!lov->lov_tgts[loi->loi_ost_idx]) {
2312 CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
2316 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
2317 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
2319 submd.lsm_object_id = loi->loi_id;
2320 submd.lsm_object_gr = lsm->lsm_object_gr;
2321 submd.lsm_stripe_count = 0;
2322 rc = obd_join_lru(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
2325 CERROR("join lru failed. objid: "LPX64" subobj: "LPX64
2326 " ostidx: %d rc: %d\n", lsm->lsm_object_id,
2327 loi->loi_id, loi->loi_ost_idx, rc);
2336 static int lov_statfs_interpret(struct ptlrpc_request_set *rqset,
2339 struct lov_request_set *lovset = (struct lov_request_set *)data;
2344 lovset->set_completes = 0;
2346 err = lov_fini_statfs_set(lovset);
2347 RETURN(rc ? rc : err);
2350 static int lov_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
2351 __u64 max_age, struct ptlrpc_request_set *rqset)
2353 struct lov_request_set *set;
2354 struct lov_request *req;
2355 struct list_head *pos;
2356 struct lov_obd *lov;
2360 LASSERT(oinfo != NULL);
2361 LASSERT(oinfo->oi_osfs != NULL);
2364 rc = lov_prep_statfs_set(obd, oinfo, &set);
2368 list_for_each (pos, &set->set_list) {
2369 struct obd_device *osc_obd;
2371 req = list_entry(pos, struct lov_request, rq_link);
2373 osc_obd = class_exp2obd(lov->lov_tgts[req->rq_idx]->ltd_exp);
2374 rc = obd_statfs_async(osc_obd, &req->rq_oi, max_age, rqset);
2379 if (rc || list_empty(&rqset->set_requests)) {
2382 set->set_completes = 0;
2383 err = lov_fini_statfs_set(set);
2384 RETURN(rc ? rc : err);
2387 LASSERT(rqset->set_interpret == NULL);
2388 rqset->set_interpret = lov_statfs_interpret;
2389 rqset->set_arg = (void *)set;
2393 static int lov_statfs(struct obd_device *obd, struct obd_statfs *osfs,
2394 __u64 max_age, __u32 flags)
2396 struct ptlrpc_request_set *set = NULL;
2397 struct obd_info oinfo = { { { 0 } } };
2402 /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
2403 * statfs requests */
2404 set = ptlrpc_prep_set();
2408 oinfo.oi_osfs = osfs;
2409 oinfo.oi_flags = flags;
2410 rc = lov_statfs_async(obd, &oinfo, max_age, set);
2412 rc = ptlrpc_set_wait(set);
2413 ptlrpc_set_destroy(set);
2418 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2419 void *karg, void *uarg)
2421 struct obd_device *obddev = class_exp2obd(exp);
2422 struct lov_obd *lov = &obddev->u.lov;
2423 int i, rc, count = lov->desc.ld_tgt_count;
2424 struct obd_uuid *uuidp;
2428 case IOC_OBD_STATFS: {
2429 struct obd_ioctl_data *data = karg;
2430 struct obd_device *osc_obd;
2431 struct obd_statfs stat_buf = {0};
2434 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
2435 LASSERT(data->ioc_plen1 == sizeof(struct obd_statfs));
2437 if ((index >= count))
2440 if (!lov->lov_tgts[index])
2441 /* Try again with the next index */
2443 if (!lov->lov_tgts[index]->ltd_active)
2446 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
2450 /* got statfs data */
2451 rc = obd_statfs(osc_obd, &stat_buf,
2452 cfs_time_current_64() - HZ, 0);
2455 if (copy_to_user(data->ioc_pbuf1, &stat_buf, data->ioc_plen1))
2458 rc = copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
2462 case OBD_IOC_LOV_GET_CONFIG: {
2463 struct obd_ioctl_data *data;
2464 struct lov_desc *desc;
2469 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
2472 data = (struct obd_ioctl_data *)buf;
2474 if (sizeof(*desc) > data->ioc_inllen1) {
2475 obd_ioctl_freedata(buf, len);
2479 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
2480 obd_ioctl_freedata(buf, len);
2484 if (sizeof(__u32) * count > data->ioc_inllen3) {
2485 obd_ioctl_freedata(buf, len);
2489 desc = (struct lov_desc *)data->ioc_inlbuf1;
2490 memcpy(desc, &(lov->desc), sizeof(*desc));
2492 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2493 genp = (__u32 *)data->ioc_inlbuf3;
2494 /* the uuid will be empty for deleted OSTs */
2495 for (i = 0; i < count; i++, uuidp++, genp++) {
2496 if (!lov->lov_tgts[i])
2498 *uuidp = lov->lov_tgts[i]->ltd_uuid;
2499 *genp = lov->lov_tgts[i]->ltd_gen;
2502 rc = copy_to_user((void *)uarg, buf, len);
2505 obd_ioctl_freedata(buf, len);
2508 case LL_IOC_LOV_SETSTRIPE:
2509 rc = lov_setstripe(exp, karg, uarg);
2511 case LL_IOC_LOV_GETSTRIPE:
2512 rc = lov_getstripe(exp, karg, uarg);
2514 case LL_IOC_LOV_SETEA:
2515 rc = lov_setea(exp, karg, uarg);
2524 for (i = 0; i < count; i++) {
2527 /* OST was disconnected */
2528 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2531 err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2533 if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2536 if (lov->lov_tgts[i]->ltd_active) {
2537 CDEBUG(err == -ENOTTY ?
2538 D_IOCTL : D_WARNING,
2539 "iocontrol OSC %s on OST "
2540 "idx %d cmd %x: err = %d\n",
2541 lov_uuid2str(lov, i),
2558 #define FIEMAP_BUFFER_SIZE 4096
2561 * Non-zero fe_logical indicates that this is a continuation FIEMAP
2562 * call. The local end offset and the device are sent in the first
2563 * fm_extent. This function calculates the stripe number from the index.
2564 * This function returns a stripe_no on which mapping is to be restarted.
2566 * This function returns fm_end_offset which is the in-OST offset at which
2567 * mapping should be restarted. If fm_end_offset=0 is returned then caller
2568 * will re-calculate proper offset in next stripe.
2569 * Note that the first extent is passed to lov_get_info via the value field.
2571 * \param fiemap fiemap request header
2572 * \param lsm striping information for the file
2573 * \param fm_start logical start of mapping
2574 * \param fm_end logical end of mapping
2575 * \param start_stripe starting stripe will be returned in this
2577 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
2578 struct lov_stripe_md *lsm, obd_size fm_start,
2579 obd_size fm_end, int *start_stripe)
2581 obd_size local_end = fiemap->fm_extents[0].fe_logical;
2582 obd_off lun_start, lun_end;
2583 obd_size fm_end_offset;
2584 int stripe_no = -1, i;
2586 if (fiemap->fm_extent_count == 0 ||
2587 fiemap->fm_extents[0].fe_logical == 0)
2590 /* Find out stripe_no from ost_index saved in the fe_device */
2591 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2592 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
2593 fiemap->fm_extents[0].fe_device) {
2599 /* If we have finished mapping on previous device, shift logical
2600 * offset to start of next device */
2601 if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
2602 &lun_start, &lun_end)) != 0 &&
2603 local_end < lun_end) {
2604 fm_end_offset = local_end;
2605 *start_stripe = stripe_no;
2607 /* This is a special value to indicate that caller should
2608 * calculate offset in next stripe. */
2610 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
2613 return fm_end_offset;
2617 * We calculate on which OST the mapping will end. If the length of mapping
2618 * is greater than (stripe_size * stripe_count) then the last_stripe will
2619 * will be one just before start_stripe. Else we check if the mapping
2620 * intersects each OST and find last_stripe.
2621 * This function returns the last_stripe and also sets the stripe_count
2622 * over which the mapping is spread
2624 * \param lsm striping information for the file
2625 * \param fm_start logical start of mapping
2626 * \param fm_end logical end of mapping
2627 * \param start_stripe starting stripe of the mapping
2628 * \param stripe_count the number of stripes across which to map is returned
2630 * \retval last_stripe return the last stripe of the mapping
2632 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
2633 obd_size fm_end, int start_stripe,
2637 obd_off obd_start, obd_end;
2640 if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
2641 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
2643 *stripe_count = lsm->lsm_stripe_count;
2645 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
2646 i = (i + 1) % lsm->lsm_stripe_count, j++) {
2647 if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
2648 &obd_start, &obd_end)) == 0)
2652 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
2659 * Set fe_device and copy extents from local buffer into main return buffer.
2661 * \param fiemap fiemap request header
2662 * \param lcl_fm_ext array of local fiemap extents to be copied
2663 * \param ost_index OST index to be written into the fm_device field for each
2665 * \param ext_count number of extents to be copied
2666 * \param current_extent where to start copying in main extent array
2668 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
2669 struct ll_fiemap_extent *lcl_fm_ext,
2670 int ost_index, unsigned int ext_count,
2676 for (ext = 0; ext < ext_count; ext++) {
2677 lcl_fm_ext[ext].fe_device = ost_index;
2678 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
2681 /* Copy fm_extent's from fm_local to return buffer */
2682 to = (char *)fiemap + fiemap_count_to_size(current_extent);
2683 memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
2687 * Break down the FIEMAP request and send appropriate calls to individual OSTs.
2688 * This also handles the restarting of FIEMAP calls in case mapping overflows
2689 * the available number of extents in single call.
2691 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
2692 __u32 *vallen, void *val, struct lov_stripe_md *lsm)
2694 struct ll_fiemap_info_key *fm_key = key;
2695 struct ll_user_fiemap *fiemap = val;
2696 struct ll_user_fiemap *fm_local = NULL;
2697 struct ll_fiemap_extent *lcl_fm_ext;
2699 unsigned int get_num_extents = 0;
2700 int ost_index = 0, actual_start_stripe, start_stripe;
2701 obd_size fm_start, fm_end, fm_length, fm_end_offset = 0;
2703 int current_extent = 0, rc = 0, i;
2704 int ost_eof = 0; /* EOF for object */
2705 int ost_done = 0; /* done with required mapping for this OST? */
2707 int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
2708 unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
2713 if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
2714 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
2716 OBD_ALLOC(fm_local, buffer_size);
2717 if (fm_local == NULL)
2718 GOTO(out, rc = -ENOMEM);
2719 lcl_fm_ext = &fm_local->fm_extents[0];
2721 count_local = fiemap_size_to_count(buffer_size);
2723 memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
2724 fm_start = fiemap->fm_start;
2725 fm_length = fiemap->fm_length;
2726 /* Calculate start stripe, last stripe and length of mapping */
2727 actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
2728 fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
2729 fm_start + fm_length - 1);
2730 /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
2731 if (fm_end > fm_key->oa.o_size)
2732 fm_end = fm_key->oa.o_size;
2734 last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
2735 actual_start_stripe, &stripe_count);
2737 fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start, fm_end,
2740 if (fiemap->fm_extent_count == 0) {
2741 get_num_extents = 1;
2745 /* Check each stripe */
2746 for (cur_stripe = start_stripe, i = 0; i < stripe_count;
2747 i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
2748 obd_size req_fm_len; /* Stores length of required mapping */
2749 obd_size len_mapped_single_call;
2750 obd_off lun_start, lun_end, obd_object_end;
2751 unsigned int ext_count;
2753 cur_stripe_wrap = cur_stripe;
2755 /* Find out range of mapping on this stripe */
2756 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
2757 &lun_start, &obd_object_end)) == 0)
2760 /* If this is a continuation FIEMAP call and we are on
2761 * starting stripe then lun_start needs to be set to
2763 if (fm_end_offset != 0 && cur_stripe == start_stripe)
2764 lun_start = fm_end_offset;
2766 if (fm_length != ~0ULL) {
2767 /* Handle fm_start + fm_length overflow */
2768 if (fm_start + fm_length < fm_start)
2769 fm_length = ~0ULL - fm_start;
2770 lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
2776 if (lun_start == lun_end)
2779 req_fm_len = obd_object_end - lun_start;
2780 fm_local->fm_length = 0;
2781 len_mapped_single_call = 0;
2783 /* If the output buffer is very large and the objects have many
2784 * extents we may need to loop on a single OST repeatedly */
2788 if (get_num_extents == 0) {
2789 /* Don't get too many extents. */
2790 if (current_extent + count_local >
2791 fiemap->fm_extent_count)
2792 count_local = fiemap->fm_extent_count -
2796 lun_start += len_mapped_single_call;
2797 fm_local->fm_length = req_fm_len - len_mapped_single_call;
2798 req_fm_len = fm_local->fm_length;
2799 fm_local->fm_extent_count = count_local;
2800 fm_local->fm_mapped_extents = 0;
2801 fm_local->fm_flags = fiemap->fm_flags;
2803 fm_key->oa.o_id = lsm->lsm_oinfo[cur_stripe]->loi_id;
2804 ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
2806 if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
2807 GOTO(out, rc = -EINVAL);
2809 /* If OST is inactive, return extent with UNKNOWN flag */
2810 if (lov && !lov->lov_tgts[ost_index]->ltd_active) {
2811 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
2812 fm_local->fm_mapped_extents = 1;
2814 lcl_fm_ext[0].fe_logical = lun_start;
2815 lcl_fm_ext[0].fe_length = obd_object_end -
2817 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
2822 fm_local->fm_start = lun_start;
2823 fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
2824 memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
2825 *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
2826 rc = obd_get_info(lov->lov_tgts[ost_index]->ltd_exp,
2827 keylen, key, vallen, fm_local, lsm);
2832 ext_count = fm_local->fm_mapped_extents;
2833 if (ext_count == 0) {
2835 /* If last stripe has hole at the end,
2836 * then we need to return */
2837 if (cur_stripe_wrap == last_stripe) {
2838 fiemap->fm_mapped_extents = 0;
2844 /* If we just need num of extents then go to next device */
2845 if (get_num_extents) {
2846 current_extent += ext_count;
2850 len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2851 lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2853 /* Have we finished mapping on this device? */
2854 if (req_fm_len <= len_mapped_single_call)
2857 /* Clear the EXTENT_LAST flag which can be present on
2859 if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2860 lcl_fm_ext[ext_count - 1].fe_flags &=
2861 ~FIEMAP_EXTENT_LAST;
2863 curr_loc = lov_stripe_size(lsm,
2864 lcl_fm_ext[ext_count - 1].fe_logical+
2865 lcl_fm_ext[ext_count - 1].fe_length,
2867 if (curr_loc >= fm_key->oa.o_size)
2870 fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2871 ost_index, ext_count,
2874 current_extent += ext_count;
2876 /* Ran out of available extents? */
2877 if (current_extent >= fiemap->fm_extent_count)
2879 } while (ost_done == 0 && ost_eof == 0);
2881 if (cur_stripe_wrap == last_stripe)
2886 /* Indicate that we are returning device offsets unless file just has
2888 if (lsm->lsm_stripe_count > 1)
2889 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2891 if (get_num_extents)
2892 goto skip_last_device_calc;
2894 /* Check if we have reached the last stripe and whether mapping for that
2895 * stripe is done. */
2896 if (cur_stripe_wrap == last_stripe) {
2897 if (ost_done || ost_eof)
2898 fiemap->fm_extents[current_extent - 1].fe_flags |=
2902 skip_last_device_calc:
2903 fiemap->fm_mapped_extents = current_extent;
2906 OBD_FREE(fm_local, buffer_size);
2910 static int lov_get_info(struct obd_export *exp, __u32 keylen,
2911 void *key, __u32 *vallen, void *val,
2912 struct lov_stripe_md *lsm)
2914 struct obd_device *obddev = class_exp2obd(exp);
2915 struct lov_obd *lov = &obddev->u.lov;
2919 if (!vallen || !val)
2924 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2927 struct ldlm_lock *lock;
2929 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2930 struct lov_oinfo *loi;
2931 __u32 *stripe = val;
2933 if (*vallen < sizeof(*stripe))
2934 GOTO(out, rc = -EFAULT);
2935 *vallen = sizeof(*stripe);
2937 /* XXX This is another one of those bits that will need to
2938 * change if we ever actually support nested LOVs. It uses
2939 * the lock's export to find out which stripe it is. */
2940 /* XXX - it's assumed all the locks for deleted OSTs have
2941 * been cancelled. Also, the export for deleted OSTs will
2942 * be NULL and won't match the lock's export. */
2943 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2944 loi = lsm->lsm_oinfo[i];
2945 if (!lov->lov_tgts[loi->loi_ost_idx])
2947 if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2948 data->lock->l_conn_export &&
2949 osc_res_name_eq(loi->loi_id, loi->loi_gr, res_id)) {
2954 LDLM_ERROR(data->lock, "lock on inode without such object");
2955 dump_lsm(D_ERROR, lsm);
2956 GOTO(out, rc = -ENXIO);
2957 } else if (KEY_IS(KEY_LAST_ID)) {
2958 struct obd_id_info *info = val;
2959 __u32 size = sizeof(obd_id);
2960 struct lov_tgt_desc *tgt;
2962 LASSERT(*vallen == sizeof(struct obd_id_info));
2963 tgt = lov->lov_tgts[info->idx];
2965 if (!tgt || !tgt->ltd_active)
2966 GOTO(out, rc = -ESRCH);
2968 rc = obd_get_info(tgt->ltd_exp, keylen, key, &size, info->data, NULL);
2970 } else if (KEY_IS(KEY_LOVDESC)) {
2971 struct lov_desc *desc_ret = val;
2972 *desc_ret = lov->desc;
2975 } else if (KEY_IS(KEY_FIEMAP)) {
2976 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2987 static int lov_set_info_async(struct obd_export *exp, obd_count keylen,
2988 void *key, obd_count vallen, void *val,
2989 struct ptlrpc_request_set *set)
2991 struct obd_device *obddev = class_exp2obd(exp);
2992 struct lov_obd *lov = &obddev->u.lov;
2995 struct lov_tgt_desc *tgt;
2996 unsigned incr, check_uuid,
2997 do_inactive, no_set;
2998 unsigned next_id = 0, mds_con = 0;
3001 incr = check_uuid = do_inactive = no_set = 0;
3004 set = ptlrpc_prep_set();
3010 count = lov->desc.ld_tgt_count;
3012 if (KEY_IS(KEY_NEXT_ID)) {
3013 count = vallen / sizeof(struct obd_id_info);
3014 vallen = sizeof(obd_id);
3015 incr = sizeof(struct obd_id_info);
3018 } else if (KEY_IS(KEY_CHECKSUM)) {
3020 } else if (KEY_IS(KEY_UNLINKED)) {
3021 check_uuid = val ? 1 : 0;
3022 } else if (KEY_IS(KEY_EVICT_BY_NID)) {
3023 /* use defaults: do_inactive = incr = 0; */
3024 } else if (KEY_IS(KEY_MDS_CONN)) {
3028 for (i = 0; i < count; i++, val = (char *)val + incr) {
3030 tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
3032 tgt = lov->lov_tgts[i];
3034 /* OST was disconnected */
3035 if (!tgt || !tgt->ltd_exp)
3038 /* OST is inactive and we don't want inactive OSCs */
3039 if (!tgt->ltd_active && !do_inactive)
3043 struct mds_group_info *mgi;
3045 LASSERT(vallen == sizeof(*mgi));
3046 mgi = (struct mds_group_info *)val;
3048 /* Only want a specific OSC */
3049 if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
3053 err = obd_set_info_async(tgt->ltd_exp,
3054 keylen, key, sizeof(int),
3056 } else if (next_id) {
3057 err = obd_set_info_async(tgt->ltd_exp,
3058 keylen, key, vallen,
3059 ((struct obd_id_info*)val)->data, set);
3061 /* Only want a specific OSC */
3063 !obd_uuid_equals(val, &tgt->ltd_uuid))
3066 err = obd_set_info_async(tgt->ltd_exp,
3067 keylen, key, vallen, val, set);
3076 err = ptlrpc_set_wait(set);
3079 ptlrpc_set_destroy(set);
3084 static int lov_checkmd(struct obd_export *exp, struct obd_export *md_exp,
3085 struct lov_stripe_md *lsm)
3093 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
3094 rc = lsm_op_find(lsm->lsm_magic)->lsm_revalidate(lsm, md_exp->exp_obd);
3099 int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm)
3104 for (i = 0; i < lsm->lsm_stripe_count; i++) {
3105 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
3106 if (loi->loi_ar.ar_rc && !rc)
3107 rc = loi->loi_ar.ar_rc;
3108 loi->loi_ar.ar_rc = 0;
3112 EXPORT_SYMBOL(lov_test_and_clear_async_rc);
3115 static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm,
3116 int cmd, __u64 *offset)
3118 __u32 ssize = lsm->lsm_stripe_size;
3122 do_div(start, ssize);
3123 start = start * ssize;
3125 CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64
3126 ", end "LPU64"\n", *offset, ssize, start,
3128 if (cmd == OBD_CALC_STRIPE_END) {
3129 *offset = start + ssize - 1;
3130 } else if (cmd == OBD_CALC_STRIPE_START) {
3141 struct lov_multi_wait {
3142 struct ldlm_lock *lock;
3148 int lov_complete_many(struct obd_export *exp, struct lov_stripe_md *lsm,
3149 struct lustre_handle *lockh)
3151 struct lov_lock_handles *lov_lockh = NULL;
3152 struct lustre_handle *lov_lockhp;
3153 struct lov_obd *lov;
3154 struct lov_oinfo *loi;
3155 struct lov_multi_wait *queues;
3159 ASSERT_LSM_MAGIC(lsm);
3161 if (!exp || !exp->exp_obd)
3164 LASSERT(lockh != NULL);
3165 if (lsm->lsm_stripe_count > 1) {
3166 lov_lockh = lov_handle2llh(lockh);
3167 if (lov_lockh == NULL) {
3168 CERROR("LOV: invalid lov lock handle %p\n", lockh);
3172 lov_lockhp = lov_lockh->llh_handles;
3177 OBD_ALLOC(queues, lsm->lsm_stripe_count * sizeof(*queues));
3179 GOTO(out, rc = -ENOMEM);
3181 lov = &exp->exp_obd->u.lov;
3182 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
3183 i++, loi++, lov_lockhp++) {
3184 struct ldlm_lock *lock;
3185 struct obd_device *obd;
3187 lock = ldlm_handle2lock(lov_lockhp);
3189 CDEBUG(D_HA, "lov idx %d subobj "LPX64" no lock?\n",
3190 loi->loi_ost_idx, loi->loi_id);
3191 queues[i].completed = 1;
3195 queues[i].lock = lock;
3196 init_waitqueue_entry(&(queues[i].wait), current);
3197 add_wait_queue(lock->l_waitq, &(queues[i].wait));
3199 obd = class_exp2obd(lock->l_conn_export);
3201 imp = obd->u.cli.cl_import;
3203 spin_lock(&imp->imp_lock);
3204 queues[i].generation = imp->imp_generation;
3205 spin_unlock(&imp->imp_lock);
3209 lwi = LWI_TIMEOUT_INTR(obd_timeout * HZ, ldlm_expired_completion_wait,
3210 interrupted_completion_wait, &lwd);
3211 rc = l_wait_event_added(check_multi_complete(queues, lsm), &lwi);
3213 for (i = 0; i < lsm->lsm_stripe_count; i++)
3214 remove_wait_queue(lock->l_waitq, &(queues[i].wait));
3216 if (rc == -EINTR || rc == -ETIMEDOUT) {
3222 if (lov_lockh != NULL)
3223 lov_llh_put(lov_lockh);
3228 void lov_stripe_lock(struct lov_stripe_md *md)
3230 LASSERT(md->lsm_lock_owner != cfs_curproc_pid());
3231 spin_lock(&md->lsm_lock);
3232 LASSERT(md->lsm_lock_owner == 0);
3233 md->lsm_lock_owner = cfs_curproc_pid();
3235 EXPORT_SYMBOL(lov_stripe_lock);
3237 void lov_stripe_unlock(struct lov_stripe_md *md)
3239 LASSERT(md->lsm_lock_owner == cfs_curproc_pid());
3240 md->lsm_lock_owner = 0;
3241 spin_unlock(&md->lsm_lock);
3243 EXPORT_SYMBOL(lov_stripe_unlock);
3246 * Checks if requested extent lock is compatible with a lock under the page.
3248 * Checks if the lock under \a page is compatible with a read or write lock
3249 * (specified by \a rw) for an extent [\a start , \a end].
3251 * \param exp lov export
3252 * \param lsm striping information for the file
3253 * \param res lov_async_page placeholder
3254 * \param rw OBD_BRW_READ if requested for reading,
3255 * OBD_BRW_WRITE if requested for writing
3256 * \param start start of the requested extent
3257 * \param end end of the requested extent
3258 * \param cookie transparent parameter for passing locking context
3260 * \post result == 1, *cookie == context, appropriate lock is referenced or
3263 * \retval 1 owned lock is reused for the request
3264 * \retval 0 no lock reused for the request
3266 * \see lov_release_short_lock
3268 static int lov_reget_short_lock(struct obd_export *exp,
3269 struct lov_stripe_md *lsm,
3271 obd_off start, obd_off end,
3274 struct lov_async_page *l = *res;
3275 obd_off stripe_start, stripe_end = start;
3279 /* ensure we don't cross stripe boundaries */
3280 lov_extent_calc(exp, lsm, OBD_CALC_STRIPE_END, &stripe_end);
3281 if (stripe_end <= end)
3284 /* map the region limits to the object limits */
3285 lov_stripe_offset(lsm, start, l->lap_stripe, &stripe_start);
3286 lov_stripe_offset(lsm, end, l->lap_stripe, &stripe_end);
3288 RETURN(obd_reget_short_lock(exp->exp_obd->u.lov.lov_tgts[lsm->
3289 lsm_oinfo[l->lap_stripe]->loi_ost_idx]->
3290 ltd_exp, NULL, &l->lap_sub_cookie,
3291 rw, stripe_start, stripe_end, cookie));
3295 * Releases a reference to a lock taken in a "fast" way.
3297 * Releases a read or a write (specified by \a rw) lock
3298 * referenced by \a cookie.
3300 * \param exp lov export
3301 * \param lsm striping information for the file
3302 * \param end end of the locked extent
3303 * \param rw OBD_BRW_READ if requested for reading,
3304 * OBD_BRW_WRITE if requested for writing
3305 * \param cookie transparent parameter for passing locking context
3307 * \post appropriate lock is dereferenced
3309 * \see lov_reget_short_lock
3311 static int lov_release_short_lock(struct obd_export *exp,
3312 struct lov_stripe_md *lsm, obd_off end,
3313 void *cookie, int rw)
3319 stripe = lov_stripe_number(lsm, end);
3321 RETURN(obd_release_short_lock(exp->exp_obd->u.lov.lov_tgts[lsm->
3322 lsm_oinfo[stripe]->loi_ost_idx]->
3323 ltd_exp, NULL, end, cookie, rw));
3326 struct obd_ops lov_obd_ops = {
3327 .o_owner = THIS_MODULE,
3328 .o_setup = lov_setup,
3329 .o_precleanup = lov_precleanup,
3330 .o_cleanup = lov_cleanup,
3331 .o_process_config = lov_process_config,
3332 .o_connect = lov_connect,
3333 .o_disconnect = lov_disconnect,
3334 .o_statfs = lov_statfs,
3335 .o_statfs_async = lov_statfs_async,
3336 .o_packmd = lov_packmd,
3337 .o_unpackmd = lov_unpackmd,
3338 .o_checkmd = lov_checkmd,
3339 .o_create = lov_create,
3340 .o_destroy = lov_destroy,
3341 .o_getattr = lov_getattr,
3342 .o_getattr_async = lov_getattr_async,
3343 .o_setattr = lov_setattr,
3344 .o_setattr_async = lov_setattr_async,
3346 .o_brw_async = lov_brw_async,
3347 .o_prep_async_page = lov_prep_async_page,
3348 .o_reget_short_lock = lov_reget_short_lock,
3349 .o_release_short_lock = lov_release_short_lock,
3350 .o_queue_async_io = lov_queue_async_io,
3351 .o_set_async_flags = lov_set_async_flags,
3352 .o_queue_group_io = lov_queue_group_io,
3353 .o_trigger_group_io = lov_trigger_group_io,
3354 .o_teardown_async_page = lov_teardown_async_page,
3355 .o_merge_lvb = lov_merge_lvb,
3356 .o_adjust_kms = lov_adjust_kms,
3357 .o_punch = lov_punch,
3359 .o_enqueue = lov_enqueue,
3360 .o_match = lov_match,
3361 .o_change_cbdata = lov_change_cbdata,
3362 .o_cancel = lov_cancel,
3363 .o_cancel_unused = lov_cancel_unused,
3364 .o_join_lru = lov_join_lru,
3365 .o_iocontrol = lov_iocontrol,
3366 .o_get_info = lov_get_info,
3367 .o_set_info_async = lov_set_info_async,
3368 .o_extent_calc = lov_extent_calc,
3369 .o_llog_init = lov_llog_init,
3370 .o_llog_finish = lov_llog_finish,
3371 .o_notify = lov_notify,
3372 .o_register_page_removal_cb = lov_register_page_removal_cb,
3373 .o_unregister_page_removal_cb = lov_unregister_page_removal_cb,
3374 .o_register_lock_cancel_cb = lov_register_lock_cancel_cb,
3375 .o_unregister_lock_cancel_cb = lov_unregister_lock_cancel_cb,
3376 .o_pool_new = lov_pool_new,
3377 .o_pool_rem = lov_pool_remove,
3378 .o_pool_add = lov_pool_add,
3379 .o_pool_del = lov_pool_del,
3382 static quota_interface_t *quota_interface;
3383 extern quota_interface_t lov_quota_interface;
3385 cfs_mem_cache_t *lov_oinfo_slab;
3387 int __init lov_init(void)
3389 struct lprocfs_static_vars lvars = { 0 };
3393 lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo",
3394 sizeof(struct lov_oinfo),
3395 0, SLAB_HWCACHE_ALIGN);
3396 if (lov_oinfo_slab == NULL)
3398 lprocfs_lov_init_vars(&lvars);
3400 request_module("lquota");
3401 quota_interface = PORTAL_SYMBOL_GET(lov_quota_interface);
3402 init_obd_quota_ops(quota_interface, &lov_obd_ops);
3404 rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
3405 LUSTRE_LOV_NAME, NULL);
3407 if (quota_interface)
3408 PORTAL_SYMBOL_PUT(lov_quota_interface);
3409 rc2 = cfs_mem_cache_destroy(lov_oinfo_slab);
3417 static void /*__exit*/ lov_exit(void)
3421 if (quota_interface)
3422 PORTAL_SYMBOL_PUT(lov_quota_interface);
3424 class_unregister_type(LUSTRE_LOV_NAME);
3425 rc = cfs_mem_cache_destroy(lov_oinfo_slab);
3429 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3430 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
3431 MODULE_LICENSE("GPL");
3433 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);