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b=22176 Add .sync_fs super block handler
[fs/lustre-release.git] / lustre / lov / lov_obd.c
1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  * GPL HEADER START
5  *
6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7  *
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.
11  *
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).
17  *
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
21  *
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
24  * have any questions.
25  *
26  * GPL HEADER END
27  */
28 /*
29  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
30  * Use is subject to license terms.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/lov/lov_obd.c
37  *
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>
42  */
43
44 #ifndef EXPORT_SYMTAB
45 # define EXPORT_SYMTAB
46 #endif
47 #define DEBUG_SUBSYSTEM S_LOV
48 #ifdef __KERNEL__
49 #include <libcfs/libcfs.h>
50 #else
51 #include <liblustre.h>
52 #endif
53
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>
62 #include <obd_lov.h>
63 #include <obd_ost.h>
64 #include <lprocfs_status.h>
65 #include <lustre_param.h>
66 #include <cl_object.h>
67 #include <lustre/ll_fiemap.h>
68
69 #include "lov_internal.h"
70
71 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
72    Any function that expects lov_tgts to remain stationary must take a ref. */
73 static void lov_getref(struct obd_device *obd)
74 {
75         struct lov_obd *lov = &obd->u.lov;
76
77         /* nobody gets through here until lov_putref is done */
78         cfs_mutex_down(&lov->lov_lock);
79         cfs_atomic_inc(&lov->lov_refcount);
80         cfs_mutex_up(&lov->lov_lock);
81         return;
82 }
83
84 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
85
86 static void lov_putref(struct obd_device *obd)
87 {
88         struct lov_obd *lov = &obd->u.lov;
89
90         cfs_mutex_down(&lov->lov_lock);
91         /* ok to dec to 0 more than once -- ltd_exp's will be null */
92         if (cfs_atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
93                 CFS_LIST_HEAD(kill);
94                 int i;
95                 struct lov_tgt_desc *tgt, *n;
96                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
97                        lov->lov_death_row);
98                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
99                         tgt = lov->lov_tgts[i];
100
101                         if (!tgt || !tgt->ltd_reap)
102                                 continue;
103                         cfs_list_add(&tgt->ltd_kill, &kill);
104                         /* XXX - right now there is a dependency on ld_tgt_count
105                          * being the maximum tgt index for computing the
106                          * mds_max_easize. So we can't shrink it. */
107                         lov_ost_pool_remove(&lov->lov_packed, i);
108                         lov->lov_tgts[i] = NULL;
109                         lov->lov_death_row--;
110                 }
111                 cfs_mutex_up(&lov->lov_lock);
112
113                 cfs_list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
114                         cfs_list_del(&tgt->ltd_kill);
115                         /* Disconnect */
116                         __lov_del_obd(obd, tgt);
117                 }
118         } else {
119                 cfs_mutex_up(&lov->lov_lock);
120         }
121 }
122
123 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
124                               int activate);
125 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
126                       enum obd_notify_event ev, void *data);
127
128
129 #define MAX_STRING_SIZE 128
130 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
131                     struct obd_connect_data *data)
132 {
133         struct lov_obd *lov = &obd->u.lov;
134         struct obd_uuid *tgt_uuid;
135         struct obd_device *tgt_obd;
136         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
137         struct obd_import *imp;
138 #ifdef __KERNEL__
139         cfs_proc_dir_entry_t *lov_proc_dir;
140 #endif
141         int rc;
142         ENTRY;
143
144         if (!lov->lov_tgts[index])
145                 RETURN(-EINVAL);
146
147         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
148         tgt_obd = lov->lov_tgts[index]->ltd_obd;
149
150         if (!tgt_obd->obd_set_up) {
151                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
152                 RETURN(-EINVAL);
153         }
154
155         /* override the sp_me from lov */
156         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
157
158         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
159                 data->ocd_index = index;
160
161         /*
162          * Divine LOV knows that OBDs under it are OSCs.
163          */
164         imp = tgt_obd->u.cli.cl_import;
165
166         if (activate) {
167                 tgt_obd->obd_no_recov = 0;
168                 /* FIXME this is probably supposed to be
169                    ptlrpc_set_import_active.  Horrible naming. */
170                 ptlrpc_activate_import(imp);
171         }
172
173         rc = obd_register_observer(tgt_obd, obd);
174         if (rc) {
175                 CERROR("Target %s register_observer error %d\n",
176                        obd_uuid2str(tgt_uuid), rc);
177                 RETURN(rc);
178         }
179
180
181         if (imp->imp_invalid) {
182                 CERROR("not connecting OSC %s; administratively "
183                        "disabled\n", obd_uuid2str(tgt_uuid));
184                 RETURN(0);
185         }
186
187         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
188                          &lov_osc_uuid, data, NULL);
189         if (rc || !lov->lov_tgts[index]->ltd_exp) {
190                 CERROR("Target %s connect error %d\n",
191                        obd_uuid2str(tgt_uuid), rc);
192                 RETURN(-ENODEV);
193         }
194
195         lov->lov_tgts[index]->ltd_reap = 0;
196
197         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
198                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
199
200 #ifdef __KERNEL__
201         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
202         if (lov_proc_dir) {
203                 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
204                 cfs_proc_dir_entry_t *osc_symlink;
205
206                 LASSERT(osc_obd != NULL);
207                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
208                 LASSERT(osc_obd->obd_type->typ_name != NULL);
209
210                 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name,
211                                                   lov_proc_dir,
212                                                   "../../../%s/%s",
213                                                   osc_obd->obd_type->typ_name,
214                                                   osc_obd->obd_name);
215                 if (osc_symlink == NULL) {
216                         CERROR("could not register LOV target "
217                                 "/proc/fs/lustre/%s/%s/target_obds/%s.",
218                                 obd->obd_type->typ_name, obd->obd_name,
219                                 osc_obd->obd_name);
220                         lprocfs_remove(&lov_proc_dir);
221                 }
222         }
223 #endif
224
225         rc = qos_add_tgt(obd, index);
226         if (rc)
227                 CERROR("qos_add_tgt failed %d\n", rc);
228
229         RETURN(0);
230 }
231
232 static int lov_connect(const struct lu_env *env,
233                        struct obd_export **exp, struct obd_device *obd,
234                        struct obd_uuid *cluuid, struct obd_connect_data *data,
235                        void *localdata)
236 {
237         struct lov_obd *lov = &obd->u.lov;
238         struct lov_tgt_desc *tgt;
239         struct lustre_handle conn;
240         int i, rc;
241         ENTRY;
242
243         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
244
245         rc = class_connect(&conn, obd, cluuid);
246         if (rc)
247                 RETURN(rc);
248
249         *exp = class_conn2export(&conn);
250
251         /* Why should there ever be more than 1 connect? */
252         lov->lov_connects++;
253         LASSERT(lov->lov_connects == 1);
254
255         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
256         if (data)
257                 lov->lov_ocd = *data;
258
259         obd_getref(obd);
260         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
261                 tgt = lov->lov_tgts[i];
262                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
263                         continue;
264                 /* Flags will be lowest common denominator */
265                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
266                 if (rc) {
267                         CERROR("%s: lov connect tgt %d failed: %d\n",
268                                obd->obd_name, i, rc);
269                         continue;
270                 }
271                 /* connect to administrative disabled ost */
272                 if (!lov->lov_tgts[i]->ltd_exp)
273                         continue;
274
275                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
276                                 OBD_NOTIFY_CONNECT, (void *)&i);
277                 if (rc) {
278                         CERROR("%s error sending notify %d\n",
279                                obd->obd_name, rc);
280                 }
281         }
282         obd_putref(obd);
283
284         RETURN(0);
285 }
286
287 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
288 {
289         cfs_proc_dir_entry_t *lov_proc_dir;
290         struct lov_obd *lov = &obd->u.lov;
291         struct obd_device *osc_obd;
292         int rc;
293         ENTRY;
294
295         osc_obd = class_exp2obd(tgt->ltd_exp);
296         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
297                obd->obd_name, osc_obd->obd_name);
298
299         if (tgt->ltd_active) {
300                 tgt->ltd_active = 0;
301                 lov->desc.ld_active_tgt_count--;
302                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
303         }
304
305         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
306         if (lov_proc_dir) {
307                 cfs_proc_dir_entry_t *osc_symlink;
308
309                 osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name);
310                 if (osc_symlink) {
311                         lprocfs_remove(&osc_symlink);
312                 } else {
313                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing.",
314                                obd->obd_type->typ_name, obd->obd_name,
315                                osc_obd->obd_name);
316                 }
317         }
318
319         if (osc_obd) {
320                 /* Pass it on to our clients.
321                  * XXX This should be an argument to disconnect,
322                  * XXX not a back-door flag on the OBD.  Ah well.
323                  */
324                 osc_obd->obd_force = obd->obd_force;
325                 osc_obd->obd_fail = obd->obd_fail;
326                 osc_obd->obd_no_recov = obd->obd_no_recov;
327         }
328
329         obd_register_observer(osc_obd, NULL);
330
331         rc = obd_disconnect(tgt->ltd_exp);
332         if (rc) {
333                 CERROR("Target %s disconnect error %d\n",
334                        tgt->ltd_uuid.uuid, rc);
335                 rc = 0;
336         }
337
338         qos_del_tgt(obd, tgt);
339
340         tgt->ltd_exp = NULL;
341         RETURN(0);
342 }
343
344 static int lov_disconnect(struct obd_export *exp)
345 {
346         struct obd_device *obd = class_exp2obd(exp);
347         struct lov_obd *lov = &obd->u.lov;
348         int i, rc;
349         ENTRY;
350
351         if (!lov->lov_tgts)
352                 goto out;
353
354         /* Only disconnect the underlying layers on the final disconnect. */
355         lov->lov_connects--;
356         if (lov->lov_connects != 0) {
357                 /* why should there be more than 1 connect? */
358                 CERROR("disconnect #%d\n", lov->lov_connects);
359                 goto out;
360         }
361
362         /* Let's hold another reference so lov_del_obd doesn't spin through
363            putref every time */
364         obd_getref(obd);
365
366         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
367                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
368                         /* Disconnection is the last we know about an obd */
369                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
370                 }
371         }
372         obd_putref(obd);
373
374 out:
375         rc = class_disconnect(exp); /* bz 9811 */
376         RETURN(rc);
377 }
378
379 /* Error codes:
380  *
381  *  -EINVAL  : UUID can't be found in the LOV's target list
382  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
383  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
384  *  any >= 0 : is log target index
385  */
386 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
387                               int activate)
388 {
389         struct lov_obd *lov = &obd->u.lov;
390         struct lov_tgt_desc *tgt;
391         int index;
392         ENTRY;
393
394         CDEBUG(D_INFO, "Searching in lov %p for uuid %s (activate=%d)\n",
395                lov, uuid->uuid, activate);
396
397         obd_getref(obd);
398         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
399                 tgt = lov->lov_tgts[index];
400                 if (!tgt || !tgt->ltd_exp)
401                         continue;
402
403                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
404                        index, obd_uuid2str(&tgt->ltd_uuid),
405                        tgt->ltd_exp->exp_handle.h_cookie);
406                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
407                         break;
408         }
409
410         if (index == lov->desc.ld_tgt_count)
411                 GOTO(out, index = -EINVAL);
412
413         if (lov->lov_tgts[index]->ltd_active == activate) {
414                 CDEBUG(D_INFO, "OSC %s already %sactive!\n", uuid->uuid,
415                        activate ? "" : "in");
416                 GOTO(out, index);
417         }
418
419         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n", obd_uuid2str(uuid),
420                activate ? "" : "in");
421
422         lov->lov_tgts[index]->ltd_active = activate;
423
424         if (activate) {
425                 lov->desc.ld_active_tgt_count++;
426                 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
427         } else {
428                 lov->desc.ld_active_tgt_count--;
429                 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
430         }
431         /* remove any old qos penalty */
432         lov->lov_tgts[index]->ltd_qos.ltq_penalty = 0;
433
434  out:
435         obd_putref(obd);
436         RETURN(index);
437 }
438
439 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
440                       enum obd_notify_event ev, void *data)
441 {
442         int rc = 0;
443         ENTRY;
444
445         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
446                 struct obd_uuid *uuid;
447
448                 LASSERT(watched);
449
450                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
451                         CERROR("unexpected notification of %s %s!\n",
452                                watched->obd_type->typ_name,
453                                watched->obd_name);
454                         RETURN(-EINVAL);
455                 }
456                 uuid = &watched->u.cli.cl_target_uuid;
457
458                 /* Set OSC as active before notifying the observer, so the
459                  * observer can use the OSC normally.
460                  */
461                 rc = lov_set_osc_active(obd, uuid, ev == OBD_NOTIFY_ACTIVE);
462                 if (rc < 0) {
463                         CERROR("%sactivation of %s failed: %d\n",
464                                (ev == OBD_NOTIFY_ACTIVE) ? "" : "de",
465                                obd_uuid2str(uuid), rc);
466                         RETURN(rc);
467                 }
468                 /* active event should be pass lov target index as data */
469                 data = &rc;
470         }
471
472         /* Pass the notification up the chain. */
473         if (watched) {
474                 rc = obd_notify_observer(obd, watched, ev, data);
475         } else {
476                 /* NULL watched means all osc's in the lov (only for syncs) */
477                 /* sync event should be send lov idx as data */
478                 struct lov_obd *lov = &obd->u.lov;
479                 int i, is_sync;
480
481                 data = &i;
482                 is_sync = (ev == OBD_NOTIFY_SYNC) ||
483                           (ev == OBD_NOTIFY_SYNC_NONBLOCK);
484
485                 obd_getref(obd);
486                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
487                         if (!lov->lov_tgts[i])
488                                 continue;
489
490                         /* don't send sync event if target not
491                          * connected/activated */
492                         if (is_sync &&  !lov->lov_tgts[i]->ltd_active)
493                                 continue;
494
495                         rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
496                                                  ev, data);
497                         if (rc) {
498                                 CERROR("%s: notify %s of %s failed %d\n",
499                                        obd->obd_name,
500                                        obd->obd_observer->obd_name,
501                                        lov->lov_tgts[i]->ltd_obd->obd_name,
502                                        rc);
503                         }
504                 }
505                 obd_putref(obd);
506         }
507
508         RETURN(rc);
509 }
510
511 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
512                           __u32 index, int gen, int active)
513 {
514         struct lov_obd *lov = &obd->u.lov;
515         struct lov_tgt_desc *tgt;
516         struct obd_device *tgt_obd;
517         int rc;
518         ENTRY;
519
520         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
521                uuidp->uuid, index, gen, active);
522
523         if (gen <= 0) {
524                 CERROR("request to add OBD %s with invalid generation: %d\n",
525                        uuidp->uuid, gen);
526                 RETURN(-EINVAL);
527         }
528
529         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
530                                         &obd->obd_uuid);
531         if (tgt_obd == NULL)
532                 RETURN(-EINVAL);
533
534         cfs_mutex_down(&lov->lov_lock);
535
536         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
537                 tgt = lov->lov_tgts[index];
538                 CERROR("UUID %s already assigned at LOV target index %d\n",
539                        obd_uuid2str(&tgt->ltd_uuid), index);
540                 cfs_mutex_up(&lov->lov_lock);
541                 RETURN(-EEXIST);
542         }
543
544         if (index >= lov->lov_tgt_size) {
545                 /* We need to reallocate the lov target array. */
546                 struct lov_tgt_desc **newtgts, **old = NULL;
547                 __u32 newsize, oldsize = 0;
548
549                 newsize = max(lov->lov_tgt_size, (__u32)2);
550                 while (newsize < index + 1)
551                         newsize = newsize << 1;
552                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
553                 if (newtgts == NULL) {
554                         cfs_mutex_up(&lov->lov_lock);
555                         RETURN(-ENOMEM);
556                 }
557
558                 if (lov->lov_tgt_size) {
559                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
560                                lov->lov_tgt_size);
561                         old = lov->lov_tgts;
562                         oldsize = lov->lov_tgt_size;
563                 }
564
565                 lov->lov_tgts = newtgts;
566                 lov->lov_tgt_size = newsize;
567 #ifdef __KERNEL__
568                 smp_rmb();
569 #endif
570                 if (old)
571                         OBD_FREE(old, sizeof(*old) * oldsize);
572
573                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
574                        lov->lov_tgts, lov->lov_tgt_size);
575         }
576
577         OBD_ALLOC_PTR(tgt);
578         if (!tgt) {
579                 cfs_mutex_up(&lov->lov_lock);
580                 RETURN(-ENOMEM);
581         }
582
583         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
584         if (rc) {
585                 cfs_mutex_up(&lov->lov_lock);
586                 OBD_FREE_PTR(tgt);
587                 RETURN(rc);
588         }
589
590         tgt->ltd_uuid = *uuidp;
591         tgt->ltd_obd = tgt_obd;
592         /* XXX - add a sanity check on the generation number. */
593         tgt->ltd_gen = gen;
594         tgt->ltd_index = index;
595         tgt->ltd_activate = active;
596         lov->lov_tgts[index] = tgt;
597         if (index >= lov->desc.ld_tgt_count)
598                 lov->desc.ld_tgt_count = index + 1;
599
600         cfs_mutex_up(&lov->lov_lock);
601
602         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
603                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
604
605         rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
606
607         if (lov->lov_connects == 0) {
608                 /* lov_connect hasn't been called yet. We'll do the
609                    lov_connect_obd on this target when that fn first runs,
610                    because we don't know the connect flags yet. */
611                 RETURN(0);
612         }
613
614         obd_getref(obd);
615
616         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
617         if (rc)
618                 GOTO(out, rc);
619
620         /* connect to administrative disabled ost */
621         if (!tgt->ltd_exp)
622                 GOTO(out, rc = 0);
623
624         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
625                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
626                         (void *)&index);
627
628 out:
629         if (rc) {
630                 CERROR("add failed (%d), deleting %s\n", rc,
631                        obd_uuid2str(&tgt->ltd_uuid));
632                 lov_del_target(obd, index, 0, 0);
633         }
634         obd_putref(obd);
635         RETURN(rc);
636 }
637
638 /* Schedule a target for deletion */
639 int lov_del_target(struct obd_device *obd, __u32 index,
640                    struct obd_uuid *uuidp, int gen)
641 {
642         struct lov_obd *lov = &obd->u.lov;
643         int count = lov->desc.ld_tgt_count;
644         int rc = 0;
645         ENTRY;
646
647         if (index >= count) {
648                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
649                        index, count);
650                 RETURN(-EINVAL);
651         }
652
653         obd_getref(obd);
654
655         if (!lov->lov_tgts[index]) {
656                 CERROR("LOV target at index %d is not setup.\n", index);
657                 GOTO(out, rc = -EINVAL);
658         }
659
660         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
661                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
662                        lov_uuid2str(lov, index), index,
663                        obd_uuid2str(uuidp));
664                 GOTO(out, rc = -EINVAL);
665         }
666
667         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
668                lov_uuid2str(lov, index), index,
669                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
670                lov->lov_tgts[index]->ltd_active);
671
672         lov->lov_tgts[index]->ltd_reap = 1;
673         lov->lov_death_row++;
674         /* we really delete it from obd_putref */
675 out:
676         obd_putref(obd);
677
678         RETURN(rc);
679 }
680
681 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
682 {
683         struct obd_device *osc_obd;
684
685         LASSERT(tgt);
686         LASSERT(tgt->ltd_reap);
687
688         osc_obd = class_exp2obd(tgt->ltd_exp);
689
690         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
691                tgt->ltd_uuid.uuid,
692                osc_obd ? osc_obd->obd_name : "<no obd>");
693
694         if (tgt->ltd_exp)
695                 lov_disconnect_obd(obd, tgt);
696
697         OBD_FREE_PTR(tgt);
698
699         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
700            do it ourselves. And we can't do it from lov_cleanup,
701            because we just lost our only reference to it. */
702         if (osc_obd)
703                 class_manual_cleanup(osc_obd);
704 }
705
706 void lov_fix_desc_stripe_size(__u64 *val)
707 {
708         if (*val < PTLRPC_MAX_BRW_SIZE) {
709                 LCONSOLE_WARN("Increasing default stripe size to min %u\n",
710                               PTLRPC_MAX_BRW_SIZE);
711                 *val = PTLRPC_MAX_BRW_SIZE;
712         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
713                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
714                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
715                               "multiple of %u)\n",
716                               *val, LOV_MIN_STRIPE_SIZE);
717         }
718 }
719
720 void lov_fix_desc_stripe_count(__u32 *val)
721 {
722         if (*val == 0)
723                 *val = 1;
724 }
725
726 void lov_fix_desc_pattern(__u32 *val)
727 {
728         /* from lov_setstripe */
729         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
730                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
731                 *val = 0;
732         }
733 }
734
735 void lov_fix_desc_qos_maxage(__u32 *val)
736 {
737         /* fix qos_maxage */
738         if (*val == 0)
739                 *val = QOS_DEFAULT_MAXAGE;
740 }
741
742 void lov_fix_desc(struct lov_desc *desc)
743 {
744         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
745         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
746         lov_fix_desc_pattern(&desc->ld_pattern);
747         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
748 }
749
750 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
751 {
752         struct lprocfs_static_vars lvars = { 0 };
753         struct lov_desc *desc;
754         struct lov_obd *lov = &obd->u.lov;
755         int rc;
756         ENTRY;
757
758         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
759                 CERROR("LOV setup requires a descriptor\n");
760                 RETURN(-EINVAL);
761         }
762
763         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
764
765         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
766                 CERROR("descriptor size wrong: %d > %d\n",
767                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
768                 RETURN(-EINVAL);
769         }
770
771         if (desc->ld_magic != LOV_DESC_MAGIC) {
772                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
773                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
774                                    obd->obd_name, desc);
775                             lustre_swab_lov_desc(desc);
776                 } else {
777                         CERROR("%s: Bad lov desc magic: %#x\n",
778                                obd->obd_name, desc->ld_magic);
779                         RETURN(-EINVAL);
780                 }
781         }
782
783         lov_fix_desc(desc);
784
785         desc->ld_active_tgt_count = 0;
786         lov->desc = *desc;
787         lov->lov_tgt_size = 0;
788
789         cfs_sema_init(&lov->lov_lock, 1);
790         cfs_atomic_set(&lov->lov_refcount, 0);
791         CFS_INIT_LIST_HEAD(&lov->lov_qos.lq_oss_list);
792         cfs_init_rwsem(&lov->lov_qos.lq_rw_sem);
793         lov->lov_sp_me = LUSTRE_SP_CLI;
794         lov->lov_qos.lq_dirty = 1;
795         lov->lov_qos.lq_rr.lqr_dirty = 1;
796         lov->lov_qos.lq_reset = 1;
797         /* Default priority is toward free space balance */
798         lov->lov_qos.lq_prio_free = 232;
799         /* Default threshold for rr (roughly 17%) */
800         lov->lov_qos.lq_threshold_rr = 43;
801         /* Init statfs fields */
802         OBD_ALLOC_PTR(lov->lov_qos.lq_statfs_data);
803         if (NULL == lov->lov_qos.lq_statfs_data)
804                 RETURN(-ENOMEM);
805         cfs_waitq_init(&lov->lov_qos.lq_statfs_waitq);
806
807         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
808                                                    HASH_POOLS_MAX_BITS,
809                                                    HASH_POOLS_BKT_BITS, 0,
810                                                    CFS_HASH_MIN_THETA,
811                                                    CFS_HASH_MAX_THETA,
812                                                    &pool_hash_operations,
813                                                    CFS_HASH_DEFAULT);
814         CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
815         lov->lov_pool_count = 0;
816         rc = lov_ost_pool_init(&lov->lov_packed, 0);
817         if (rc)
818                 GOTO(out_free_statfs, rc);
819         rc = lov_ost_pool_init(&lov->lov_qos.lq_rr.lqr_pool, 0);
820         if (rc)
821                 GOTO(out_free_lov_packed, rc);
822
823         lprocfs_lov_init_vars(&lvars);
824         lprocfs_obd_setup(obd, lvars.obd_vars);
825 #ifdef LPROCFS
826         {
827                 int rc;
828
829                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
830                                         0444, &lov_proc_target_fops, obd);
831                 if (rc)
832                         CWARN("Error adding the target_obd file\n");
833         }
834 #endif
835         lov->lov_pool_proc_entry = lprocfs_register("pools",
836                                                     obd->obd_proc_entry,
837                                                     NULL, NULL);
838
839         RETURN(0);
840
841 out_free_lov_packed:
842         lov_ost_pool_free(&lov->lov_packed);
843 out_free_statfs:
844         OBD_FREE_PTR(lov->lov_qos.lq_statfs_data);
845         return rc;
846 }
847
848 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
849 {
850         int rc = 0;
851         struct lov_obd *lov = &obd->u.lov;
852
853         ENTRY;
854
855         switch (stage) {
856         case OBD_CLEANUP_EARLY: {
857                 int i;
858                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
859                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
860                                 continue;
861                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
862                                        OBD_CLEANUP_EARLY);
863                 }
864                 break;
865         }
866         case OBD_CLEANUP_EXPORTS:
867                 rc = obd_llog_finish(obd, 0);
868                 if (rc != 0)
869                         CERROR("failed to cleanup llogging subsystems\n");
870                 break;
871         }
872         RETURN(rc);
873 }
874
875 static int lov_cleanup(struct obd_device *obd)
876 {
877         struct lov_obd *lov = &obd->u.lov;
878         cfs_list_t *pos, *tmp;
879         struct pool_desc *pool;
880
881         cfs_list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
882                 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
883                 /* free pool structs */
884                 CDEBUG(D_INFO, "delete pool %p\n", pool);
885                 lov_pool_del(obd, pool->pool_name);
886         }
887         cfs_hash_putref(lov->lov_pools_hash_body);
888         lov_ost_pool_free(&(lov->lov_qos.lq_rr.lqr_pool));
889         lov_ost_pool_free(&lov->lov_packed);
890
891         if (lov->lov_tgts) {
892                 int i;
893                 obd_getref(obd);
894                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
895                         if (!lov->lov_tgts[i])
896                                 continue;
897
898                         /* Inactive targets may never have connected */
899                         if (lov->lov_tgts[i]->ltd_active ||
900                             cfs_atomic_read(&lov->lov_refcount))
901                             /* We should never get here - these
902                                should have been removed in the
903                              disconnect. */
904                                 CERROR("lov tgt %d not cleaned!"
905                                        " deathrow=%d, lovrc=%d\n",
906                                        i, lov->lov_death_row,
907                                        cfs_atomic_read(&lov->lov_refcount));
908                         lov_del_target(obd, i, 0, 0);
909                 }
910                 obd_putref(obd);
911                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
912                          lov->lov_tgt_size);
913                 lov->lov_tgt_size = 0;
914         }
915
916         /* clear pools parent proc entry only after all pools is killed */
917         lprocfs_obd_cleanup(obd);
918
919         OBD_FREE_PTR(lov->lov_qos.lq_statfs_data);
920         RETURN(0);
921 }
922
923 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
924                             __u32 *indexp, int *genp)
925 {
926         struct obd_uuid obd_uuid;
927         int cmd;
928         int rc = 0;
929         ENTRY;
930
931         switch(cmd = lcfg->lcfg_command) {
932         case LCFG_LOV_ADD_OBD:
933         case LCFG_LOV_ADD_INA:
934         case LCFG_LOV_DEL_OBD: {
935                 __u32 index;
936                 int gen;
937                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
938                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
939                         GOTO(out, rc = -EINVAL);
940
941                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
942
943                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
944                         GOTO(out, rc = -EINVAL);
945                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
946                         GOTO(out, rc = -EINVAL);
947                 index = *indexp;
948                 gen = *genp;
949                 if (cmd == LCFG_LOV_ADD_OBD)
950                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
951                 else if (cmd == LCFG_LOV_ADD_INA)
952                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
953                 else
954                         rc = lov_del_target(obd, index, &obd_uuid, gen);
955                 GOTO(out, rc);
956         }
957         case LCFG_PARAM: {
958                 struct lprocfs_static_vars lvars = { 0 };
959                 struct lov_desc *desc = &(obd->u.lov.desc);
960
961                 if (!desc)
962                         GOTO(out, rc = -EINVAL);
963
964                 lprocfs_lov_init_vars(&lvars);
965
966                 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
967                                               lcfg, obd);
968                 if (rc > 0)
969                         rc = 0;
970                 GOTO(out, rc);
971         }
972         case LCFG_POOL_NEW:
973         case LCFG_POOL_ADD:
974         case LCFG_POOL_DEL:
975         case LCFG_POOL_REM:
976                 GOTO(out, rc);
977
978         default: {
979                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
980                 GOTO(out, rc = -EINVAL);
981
982         }
983         }
984 out:
985         RETURN(rc);
986 }
987
988 #ifndef log2
989 #define log2(n) cfs_ffz(~(n))
990 #endif
991
992 static int lov_clear_orphans(struct obd_export *export, struct obdo *src_oa,
993                              struct lov_stripe_md **ea,
994                              struct obd_trans_info *oti)
995 {
996         struct lov_obd *lov;
997         struct obdo *tmp_oa;
998         struct obd_uuid *ost_uuid = NULL;
999         int rc = 0, i;
1000         ENTRY;
1001
1002         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1003                 src_oa->o_flags == OBD_FL_DELORPHAN);
1004
1005         lov = &export->exp_obd->u.lov;
1006
1007         OBDO_ALLOC(tmp_oa);
1008         if (tmp_oa == NULL)
1009                 RETURN(-ENOMEM);
1010
1011         if (oti->oti_ost_uuid) {
1012                 ost_uuid = oti->oti_ost_uuid;
1013                 CDEBUG(D_HA, "clearing orphans only for %s\n",
1014                        ost_uuid->uuid);
1015         }
1016
1017         obd_getref(export->exp_obd);
1018         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1019                 struct lov_stripe_md obj_md;
1020                 struct lov_stripe_md *obj_mdp = &obj_md;
1021                 struct lov_tgt_desc *tgt;
1022                 int err;
1023
1024                 tgt = lov->lov_tgts[i];
1025                 if (!tgt)
1026                         continue;
1027
1028                 /* if called for a specific target, we don't
1029                    care if it is not active. */
1030                 if (!lov->lov_tgts[i]->ltd_active && ost_uuid == NULL) {
1031                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
1032                         continue;
1033                 }
1034
1035                 if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->ltd_uuid))
1036                         continue;
1037
1038                 CDEBUG(D_CONFIG,"Clear orphans for %d:%s\n", i,
1039                        obd_uuid2str(ost_uuid));
1040
1041                 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1042
1043                 LASSERT(lov->lov_tgts[i]->ltd_exp);
1044                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1045                 err = obd_create(lov->lov_tgts[i]->ltd_exp,
1046                                  tmp_oa, &obj_mdp, oti);
1047                 if (err) {
1048                         /* This export will be disabled until it is recovered,
1049                            and then orphan recovery will be completed. */
1050                         CERROR("error in orphan recovery on OST idx %d/%d: "
1051                                "rc = %d\n", i, lov->desc.ld_tgt_count, err);
1052                         rc = err;
1053                 }
1054
1055                 if (ost_uuid)
1056                         break;
1057         }
1058         obd_putref(export->exp_obd);
1059
1060         OBDO_FREE(tmp_oa);
1061         RETURN(rc);
1062 }
1063
1064 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
1065                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
1066 {
1067         struct lov_stripe_md *obj_mdp, *lsm;
1068         struct lov_obd *lov = &exp->exp_obd->u.lov;
1069         unsigned ost_idx;
1070         int rc, i;
1071         ENTRY;
1072
1073         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1074                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1075
1076         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1077         if (obj_mdp == NULL)
1078                 RETURN(-ENOMEM);
1079
1080         ost_idx = src_oa->o_nlink;
1081         lsm = *ea;
1082         if (lsm == NULL)
1083                 GOTO(out, rc = -EINVAL);
1084         if (ost_idx >= lov->desc.ld_tgt_count ||
1085             !lov->lov_tgts[ost_idx])
1086                 GOTO(out, rc = -EINVAL);
1087
1088         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1089                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1090                         if (lsm->lsm_oinfo[i]->loi_id != src_oa->o_id)
1091                                 GOTO(out, rc = -EINVAL);
1092                         break;
1093                 }
1094         }
1095         if (i == lsm->lsm_stripe_count)
1096                 GOTO(out, rc = -EINVAL);
1097
1098         rc = obd_create(lov->lov_tgts[ost_idx]->ltd_exp, src_oa, &obj_mdp, oti);
1099 out:
1100         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1101         RETURN(rc);
1102 }
1103
1104 /* the LOV expects oa->o_id to be set to the LOV object id */
1105 static int lov_create(struct obd_export *exp, struct obdo *src_oa,
1106                       struct lov_stripe_md **ea, struct obd_trans_info *oti)
1107 {
1108         struct lov_obd *lov;
1109         struct obd_info oinfo;
1110         struct lov_request_set *set = NULL;
1111         struct lov_request *req;
1112         struct l_wait_info  lwi = { 0 };
1113         int rc = 0;
1114         ENTRY;
1115
1116         LASSERT(ea != NULL);
1117         if (exp == NULL)
1118                 RETURN(-EINVAL);
1119
1120         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1121             src_oa->o_flags == OBD_FL_DELORPHAN) {
1122                 rc = lov_clear_orphans(exp, src_oa, ea, oti);
1123                 RETURN(rc);
1124         }
1125
1126         lov = &exp->exp_obd->u.lov;
1127         if (!lov->desc.ld_active_tgt_count)
1128                 RETURN(-EIO);
1129
1130         obd_getref(exp->exp_obd);
1131         /* Recreate a specific object id at the given OST index */
1132         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1133             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1134                  rc = lov_recreate(exp, src_oa, ea, oti);
1135                  GOTO(out, rc);
1136         }
1137
1138         /* issue statfs rpcs if the osfs data is older than qos_maxage - 1s,
1139          * later in alloc_qos(), we will wait for those rpcs to complete if
1140          * the osfs age is older than 2 * qos_maxage */
1141         qos_statfs_update(exp->exp_obd,
1142                           cfs_time_shift_64(-lov->desc.ld_qos_maxage +
1143                                             OBD_STATFS_CACHE_SECONDS),
1144                           0);
1145
1146         rc = lov_prep_create_set(exp, &oinfo, ea, src_oa, oti, &set);
1147         if (rc)
1148                 GOTO(out, rc);
1149
1150         cfs_list_for_each_entry(req, &set->set_list, rq_link) {
1151                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1152                 rc = obd_create_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1153                                       &req->rq_oi, &req->rq_oi.oi_md, oti);
1154         }
1155
1156         /* osc_create have timeout equ obd_timeout/2 so waiting don't be
1157          * longer then this */
1158         l_wait_event(set->set_waitq, lov_finished_set(set), &lwi);
1159
1160         /* we not have ptlrpc set for assign set->interpret and should
1161          * be call interpret function himself. calling from cb_create_update
1162          * not permited because lov_fini_create_set can sleep for long time,
1163          * but we must avoid sleeping in ptlrpcd interpret function. */
1164         rc = lov_fini_create_set(set, ea);
1165 out:
1166         obd_putref(exp->exp_obd);
1167         RETURN(rc);
1168 }
1169
1170 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1171 do {                                                                            \
1172         LASSERT((lsmp) != NULL);                                                \
1173         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                          \
1174                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                            \
1175                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);              \
1176 } while (0)
1177
1178 static int lov_destroy(struct obd_export *exp, struct obdo *oa,
1179                        struct lov_stripe_md *lsm, struct obd_trans_info *oti,
1180                        struct obd_export *md_exp, void *capa)
1181 {
1182         struct lov_request_set *set;
1183         struct obd_info oinfo;
1184         struct lov_request *req;
1185         cfs_list_t *pos;
1186         struct lov_obd *lov;
1187         int rc = 0, err = 0;
1188         ENTRY;
1189
1190         ASSERT_LSM_MAGIC(lsm);
1191
1192         if (!exp || !exp->exp_obd)
1193                 RETURN(-ENODEV);
1194
1195         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1196                 LASSERT(oti);
1197                 LASSERT(oti->oti_logcookies);
1198         }
1199
1200         lov = &exp->exp_obd->u.lov;
1201         obd_getref(exp->exp_obd);
1202         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1203         if (rc)
1204                 GOTO(out, rc);
1205
1206         cfs_list_for_each (pos, &set->set_list) {
1207                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1208
1209                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1210                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1211
1212                 err = obd_destroy(lov->lov_tgts[req->rq_idx]->ltd_exp,
1213                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1214                 err = lov_update_common_set(set, req, err);
1215                 if (err) {
1216                         CERROR("error: destroying objid "LPX64" subobj "
1217                                LPX64" on OST idx %d: rc = %d\n",
1218                                oa->o_id, req->rq_oi.oi_oa->o_id,
1219                                req->rq_idx, err);
1220                         if (!rc)
1221                                 rc = err;
1222                 }
1223         }
1224
1225         if (rc == 0) {
1226                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1227                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1228         }
1229         err = lov_fini_destroy_set(set);
1230 out:
1231         obd_putref(exp->exp_obd);
1232         RETURN(rc ? rc : err);
1233 }
1234
1235 static int lov_getattr(struct obd_export *exp, struct obd_info *oinfo)
1236 {
1237         struct lov_request_set *set;
1238         struct lov_request *req;
1239         cfs_list_t *pos;
1240         struct lov_obd *lov;
1241         int err = 0, rc = 0;
1242         ENTRY;
1243
1244         LASSERT(oinfo);
1245         ASSERT_LSM_MAGIC(oinfo->oi_md);
1246
1247         if (!exp || !exp->exp_obd)
1248                 RETURN(-ENODEV);
1249
1250         lov = &exp->exp_obd->u.lov;
1251
1252         rc = lov_prep_getattr_set(exp, oinfo, &set);
1253         if (rc)
1254                 RETURN(rc);
1255
1256         cfs_list_for_each (pos, &set->set_list) {
1257                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1258
1259                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1260                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1261                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1262
1263                 rc = obd_getattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1264                                  &req->rq_oi);
1265                 err = lov_update_common_set(set, req, rc);
1266                 if (err) {
1267                         CERROR("error: getattr objid "LPX64" subobj "
1268                                LPX64" on OST idx %d: rc = %d\n",
1269                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1270                                req->rq_idx, err);
1271                         break;
1272                 }
1273         }
1274
1275         rc = lov_fini_getattr_set(set);
1276         if (err)
1277                 rc = err;
1278         RETURN(rc);
1279 }
1280
1281 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1282                                  void *data, int rc)
1283 {
1284         struct lov_request_set *lovset = (struct lov_request_set *)data;
1285         int err;
1286         ENTRY;
1287
1288         /* don't do attribute merge if this aysnc op failed */
1289         if (rc)
1290                 lovset->set_completes = 0;
1291         err = lov_fini_getattr_set(lovset);
1292         RETURN(rc ? rc : err);
1293 }
1294
1295 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1296                               struct ptlrpc_request_set *rqset)
1297 {
1298         struct lov_request_set *lovset;
1299         struct lov_obd *lov;
1300         cfs_list_t *pos;
1301         struct lov_request *req;
1302         int rc = 0, err;
1303         ENTRY;
1304
1305         LASSERT(oinfo);
1306         ASSERT_LSM_MAGIC(oinfo->oi_md);
1307
1308         if (!exp || !exp->exp_obd)
1309                 RETURN(-ENODEV);
1310
1311         lov = &exp->exp_obd->u.lov;
1312
1313         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1314         if (rc)
1315                 RETURN(rc);
1316
1317         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1318                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1319                oinfo->oi_md->lsm_stripe_size);
1320
1321         cfs_list_for_each (pos, &lovset->set_list) {
1322                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1323
1324                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1325                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1326                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1327                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1328                                        &req->rq_oi, rqset);
1329                 if (rc) {
1330                         CERROR("error: getattr objid "LPX64" subobj "
1331                                LPX64" on OST idx %d: rc = %d\n",
1332                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1333                                req->rq_idx, rc);
1334                         GOTO(out, rc);
1335                 }
1336         }
1337
1338         if (!cfs_list_empty(&rqset->set_requests)) {
1339                 LASSERT(rc == 0);
1340                 LASSERT (rqset->set_interpret == NULL);
1341                 rqset->set_interpret = lov_getattr_interpret;
1342                 rqset->set_arg = (void *)lovset;
1343                 RETURN(rc);
1344         }
1345 out:
1346         if (rc)
1347                 lovset->set_completes = 0;
1348         err = lov_fini_getattr_set(lovset);
1349         RETURN(rc ? rc : err);
1350 }
1351
1352 static int lov_setattr(struct obd_export *exp, struct obd_info *oinfo,
1353                        struct obd_trans_info *oti)
1354 {
1355         struct lov_request_set *set;
1356         struct lov_obd *lov;
1357         cfs_list_t *pos;
1358         struct lov_request *req;
1359         int err = 0, rc = 0;
1360         ENTRY;
1361
1362         LASSERT(oinfo);
1363         ASSERT_LSM_MAGIC(oinfo->oi_md);
1364
1365         if (!exp || !exp->exp_obd)
1366                 RETURN(-ENODEV);
1367
1368         /* for now, we only expect the following updates here */
1369         LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1370                                             OBD_MD_FLMODE | OBD_MD_FLATIME |
1371                                             OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1372                                             OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1373                                             OBD_MD_FLGROUP | OBD_MD_FLUID |
1374                                             OBD_MD_FLGID | OBD_MD_FLFID |
1375                                             OBD_MD_FLGENER)));
1376         lov = &exp->exp_obd->u.lov;
1377         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1378         if (rc)
1379                 RETURN(rc);
1380
1381         cfs_list_for_each (pos, &set->set_list) {
1382                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1383
1384                 rc = obd_setattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1385                                  &req->rq_oi, NULL);
1386                 err = lov_update_setattr_set(set, req, rc);
1387                 if (err) {
1388                         CERROR("error: setattr objid "LPX64" subobj "
1389                                LPX64" on OST idx %d: rc = %d\n",
1390                                set->set_oi->oi_oa->o_id,
1391                                req->rq_oi.oi_oa->o_id, req->rq_idx, err);
1392                         if (!rc)
1393                                 rc = err;
1394                 }
1395         }
1396         err = lov_fini_setattr_set(set);
1397         if (!rc)
1398                 rc = err;
1399         RETURN(rc);
1400 }
1401
1402 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1403                                  void *data, int rc)
1404 {
1405         struct lov_request_set *lovset = (struct lov_request_set *)data;
1406         int err;
1407         ENTRY;
1408
1409         if (rc)
1410                 lovset->set_completes = 0;
1411         err = lov_fini_setattr_set(lovset);
1412         RETURN(rc ? rc : err);
1413 }
1414
1415 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1416    needed. Otherwise, a client is waiting for responses. */
1417 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1418                              struct obd_trans_info *oti,
1419                              struct ptlrpc_request_set *rqset)
1420 {
1421         struct lov_request_set *set;
1422         struct lov_request *req;
1423         cfs_list_t *pos;
1424         struct lov_obd *lov;
1425         int rc = 0;
1426         ENTRY;
1427
1428         LASSERT(oinfo);
1429         ASSERT_LSM_MAGIC(oinfo->oi_md);
1430         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1431                 LASSERT(oti);
1432                 LASSERT(oti->oti_logcookies);
1433         }
1434
1435         if (!exp || !exp->exp_obd)
1436                 RETURN(-ENODEV);
1437
1438         lov = &exp->exp_obd->u.lov;
1439         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1440         if (rc)
1441                 RETURN(rc);
1442
1443         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1444                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1445                oinfo->oi_md->lsm_stripe_size);
1446
1447         cfs_list_for_each (pos, &set->set_list) {
1448                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1449
1450                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1451                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1452
1453                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1454                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1455                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1456
1457                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1458                                        &req->rq_oi, oti, rqset);
1459                 if (rc) {
1460                         CERROR("error: setattr objid "LPX64" subobj "
1461                                LPX64" on OST idx %d: rc = %d\n",
1462                                set->set_oi->oi_oa->o_id,
1463                                req->rq_oi.oi_oa->o_id,
1464                                req->rq_idx, rc);
1465                         break;
1466                 }
1467         }
1468
1469         /* If we are not waiting for responses on async requests, return. */
1470         if (rc || !rqset || cfs_list_empty(&rqset->set_requests)) {
1471                 int err;
1472                 if (rc)
1473                         set->set_completes = 0;
1474                 err = lov_fini_setattr_set(set);
1475                 RETURN(rc ? rc : err);
1476         }
1477
1478         LASSERT(rqset->set_interpret == NULL);
1479         rqset->set_interpret = lov_setattr_interpret;
1480         rqset->set_arg = (void *)set;
1481
1482         RETURN(0);
1483 }
1484
1485 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1486                                void *data, int rc)
1487 {
1488         struct lov_request_set *lovset = (struct lov_request_set *)data;
1489         int err;
1490         ENTRY;
1491
1492         if (rc)
1493                 lovset->set_completes = 0;
1494         err = lov_fini_punch_set(lovset);
1495         RETURN(rc ? rc : err);
1496 }
1497
1498 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1499  * we can send this 'punch' to just the authoritative node and the nodes
1500  * that the punch will affect. */
1501 static int lov_punch(struct obd_export *exp, struct obd_info *oinfo,
1502                      struct obd_trans_info *oti,
1503                      struct ptlrpc_request_set *rqset)
1504 {
1505         struct lov_request_set *set;
1506         struct lov_obd *lov;
1507         cfs_list_t *pos;
1508         struct lov_request *req;
1509         int rc = 0;
1510         ENTRY;
1511
1512         LASSERT(oinfo);
1513         ASSERT_LSM_MAGIC(oinfo->oi_md);
1514
1515         if (!exp || !exp->exp_obd)
1516                 RETURN(-ENODEV);
1517
1518         lov = &exp->exp_obd->u.lov;
1519         rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1520         if (rc)
1521                 RETURN(rc);
1522
1523         cfs_list_for_each (pos, &set->set_list) {
1524                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1525
1526                 rc = obd_punch(lov->lov_tgts[req->rq_idx]->ltd_exp,
1527                                &req->rq_oi, NULL, rqset);
1528                 if (rc) {
1529                         CERROR("error: punch objid "LPX64" subobj "LPX64
1530                                " on OST idx %d: rc = %d\n",
1531                                set->set_oi->oi_oa->o_id,
1532                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1533                         break;
1534                 }
1535         }
1536
1537         if (rc || cfs_list_empty(&rqset->set_requests)) {
1538                 int err;
1539                 err = lov_fini_punch_set(set);
1540                 RETURN(rc ? rc : err);
1541         }
1542
1543         LASSERT(rqset->set_interpret == NULL);
1544         rqset->set_interpret = lov_punch_interpret;
1545         rqset->set_arg = (void *)set;
1546
1547         RETURN(0);
1548 }
1549
1550 static int lov_sync(struct obd_export *exp, struct obdo *oa,
1551                     struct lov_stripe_md *lsm, obd_off start, obd_off end,
1552                     void *capa)
1553 {
1554         struct lov_request_set *set;
1555         struct obd_info oinfo;
1556         struct lov_obd *lov;
1557         cfs_list_t *pos;
1558         struct lov_request *req;
1559         int err = 0, rc = 0;
1560         ENTRY;
1561
1562         ASSERT_LSM_MAGIC(lsm);
1563
1564         if (!exp->exp_obd)
1565                 RETURN(-ENODEV);
1566
1567         lov = &exp->exp_obd->u.lov;
1568         rc = lov_prep_sync_set(exp, &oinfo, oa, lsm, start, end, &set);
1569         if (rc)
1570                 RETURN(rc);
1571
1572         cfs_list_for_each (pos, &set->set_list) {
1573                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1574
1575                 rc = obd_sync(lov->lov_tgts[req->rq_idx]->ltd_exp,
1576                               req->rq_oi.oi_oa, NULL,
1577                               req->rq_oi.oi_policy.l_extent.start,
1578                               req->rq_oi.oi_policy.l_extent.end, capa);
1579                 err = lov_update_common_set(set, req, rc);
1580                 if (err) {
1581                         CERROR("error: fsync objid "LPX64" subobj "LPX64
1582                                " on OST idx %d: rc = %d\n",
1583                                set->set_oi->oi_oa->o_id,
1584                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1585                         if (!rc)
1586                                 rc = err;
1587                 }
1588         }
1589         err = lov_fini_sync_set(set);
1590         if (!rc)
1591                 rc = err;
1592         RETURN(rc);
1593 }
1594
1595 static int lov_sync_fs(struct obd_device *obd, struct obd_info *dummy,
1596                        int wait)
1597 {
1598         struct lov_obd *lov;
1599         struct obd_info oinfo = { { { 0 } } };
1600         struct lov_request *req;
1601         struct lov_request_set *set;
1602         struct l_wait_info  lwi = { 0 };
1603         cfs_list_t *pos;
1604         int rc = 0;
1605         ENTRY;
1606
1607         lov = &obd->u.lov;
1608         rc  = lov_prep_sync_fs_set(obd, &oinfo, &set);
1609         if (rc)
1610                 RETURN(rc);
1611
1612         cfs_list_for_each(pos, &set->set_list) {
1613                 struct obd_device *osc_obd;
1614                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1615
1616                 osc_obd = class_exp2obd(lov->lov_tgts[req->rq_idx]->ltd_exp);
1617                 rc = obd_sync_fs(osc_obd, &req->rq_oi, wait);
1618                 if (rc)
1619                         break;
1620         }
1621         /* if wait then check if all sync_fs IO's are done */
1622         if (wait)
1623                 l_wait_event(set->set_waitq, lov_finished_set(set), &lwi);
1624
1625         rc = lov_fini_sync_fs_set(set);
1626         RETURN(rc);
1627 }
1628
1629 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1630                          obd_count oa_bufs, struct brw_page *pga)
1631 {
1632         struct obd_info oinfo = { { { 0 } } };
1633         int i, rc = 0;
1634
1635         oinfo.oi_oa = lov_oinfo->oi_oa;
1636
1637         /* The caller just wants to know if there's a chance that this
1638          * I/O can succeed */
1639         for (i = 0; i < oa_bufs; i++) {
1640                 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1641                 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1642                 obd_off start, end;
1643
1644                 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1645                                            pga[i].off + pga[i].count - 1,
1646                                            &start, &end))
1647                         continue;
1648
1649                 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1650                         CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1651                         return -EIO;
1652                 }
1653
1654                 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1655                              1, &pga[i], NULL);
1656                 if (rc)
1657                         break;
1658         }
1659         return rc;
1660 }
1661
1662 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1663                    obd_count oa_bufs, struct brw_page *pga,
1664                    struct obd_trans_info *oti)
1665 {
1666         struct lov_request_set *set;
1667         struct lov_request *req;
1668         cfs_list_t *pos;
1669         struct lov_obd *lov = &exp->exp_obd->u.lov;
1670         int err, rc = 0;
1671         ENTRY;
1672
1673         ASSERT_LSM_MAGIC(oinfo->oi_md);
1674
1675         if (cmd == OBD_BRW_CHECK) {
1676                 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1677                 RETURN(rc);
1678         }
1679
1680         rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1681         if (rc)
1682                 RETURN(rc);
1683
1684         cfs_list_for_each (pos, &set->set_list) {
1685                 struct obd_export *sub_exp;
1686                 struct brw_page *sub_pga;
1687                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1688
1689                 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1690                 sub_pga = set->set_pga + req->rq_pgaidx;
1691                 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1692                              sub_pga, oti);
1693                 if (rc)
1694                         break;
1695                 lov_update_common_set(set, req, rc);
1696         }
1697
1698         err = lov_fini_brw_set(set);
1699         if (!rc)
1700                 rc = err;
1701         RETURN(rc);
1702 }
1703
1704 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
1705                                  void *data, int rc)
1706 {
1707         struct lov_request_set *lovset = (struct lov_request_set *)data;
1708         ENTRY;
1709         rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
1710         RETURN(rc);
1711 }
1712
1713 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
1714                        struct ldlm_enqueue_info *einfo,
1715                        struct ptlrpc_request_set *rqset)
1716 {
1717         ldlm_mode_t mode = einfo->ei_mode;
1718         struct lov_request_set *set;
1719         struct lov_request *req;
1720         cfs_list_t *pos;
1721         struct lov_obd *lov;
1722         ldlm_error_t rc;
1723         ENTRY;
1724
1725         LASSERT(oinfo);
1726         ASSERT_LSM_MAGIC(oinfo->oi_md);
1727         LASSERT(mode == (mode & -mode));
1728
1729         /* we should never be asked to replay a lock this way. */
1730         LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
1731
1732         if (!exp || !exp->exp_obd)
1733                 RETURN(-ENODEV);
1734
1735         lov = &exp->exp_obd->u.lov;
1736         rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
1737         if (rc)
1738                 RETURN(rc);
1739
1740         cfs_list_for_each (pos, &set->set_list) {
1741                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1742
1743                 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
1744                                  &req->rq_oi, einfo, rqset);
1745                 if (rc != ELDLM_OK)
1746                         GOTO(out, rc);
1747         }
1748
1749         if (rqset && !cfs_list_empty(&rqset->set_requests)) {
1750                 LASSERT(rc == 0);
1751                 LASSERT(rqset->set_interpret == NULL);
1752                 rqset->set_interpret = lov_enqueue_interpret;
1753                 rqset->set_arg = (void *)set;
1754                 RETURN(rc);
1755         }
1756 out:
1757         rc = lov_fini_enqueue_set(set, mode, rc, rqset);
1758         RETURN(rc);
1759 }
1760
1761 static int lov_change_cbdata(struct obd_export *exp,
1762                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1763                              void *data)
1764 {
1765         struct lov_obd *lov;
1766         int rc = 0, i;
1767         ENTRY;
1768
1769         ASSERT_LSM_MAGIC(lsm);
1770
1771         if (!exp || !exp->exp_obd)
1772                 RETURN(-ENODEV);
1773
1774         lov = &exp->exp_obd->u.lov;
1775         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1776                 struct lov_stripe_md submd;
1777                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1778
1779                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1780                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1781                         continue;
1782                 }
1783
1784                 LASSERT_SEQ_IS_MDT(loi->loi_seq);
1785                 submd.lsm_object_id = loi->loi_id;
1786                 submd.lsm_object_seq = loi->loi_seq;
1787                 submd.lsm_stripe_count = 0;
1788                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1789                                        &submd, it, data);
1790         }
1791         RETURN(rc);
1792 }
1793
1794 /* find any ldlm lock of the inode in lov
1795  * return 0    not find
1796  *        1    find one
1797  *      < 0    error */
1798 static int lov_find_cbdata(struct obd_export *exp,
1799                            struct lov_stripe_md *lsm, ldlm_iterator_t it,
1800                            void *data)
1801 {
1802         struct lov_obd *lov;
1803         int rc = 0, i;
1804         ENTRY;
1805
1806         ASSERT_LSM_MAGIC(lsm);
1807
1808         if (!exp || !exp->exp_obd)
1809                 RETURN(-ENODEV);
1810
1811         lov = &exp->exp_obd->u.lov;
1812         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1813                 struct lov_stripe_md submd;
1814                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1815
1816                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1817                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1818                         continue;
1819                 }
1820
1821                 LASSERT_SEQ_IS_MDT(loi->loi_seq);
1822                 submd.lsm_object_id = loi->loi_id;
1823                 submd.lsm_object_seq = loi->loi_seq;
1824                 submd.lsm_stripe_count = 0;
1825                 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1826                                      &submd, it, data);
1827                 if (rc != 0)
1828                         RETURN(rc);
1829         }
1830         RETURN(rc);
1831 }
1832
1833 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1834                       __u32 mode, struct lustre_handle *lockh)
1835 {
1836         struct lov_request_set *set;
1837         struct obd_info oinfo;
1838         struct lov_request *req;
1839         cfs_list_t *pos;
1840         struct lov_obd *lov;
1841         struct lustre_handle *lov_lockhp;
1842         int err = 0, rc = 0;
1843         ENTRY;
1844
1845         ASSERT_LSM_MAGIC(lsm);
1846
1847         if (!exp || !exp->exp_obd)
1848                 RETURN(-ENODEV);
1849
1850         LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
1851         LASSERT(lockh);
1852         lov = &exp->exp_obd->u.lov;
1853         rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
1854         if (rc)
1855                 RETURN(rc);
1856
1857         cfs_list_for_each (pos, &set->set_list) {
1858                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1859                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1860
1861                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
1862                                 req->rq_oi.oi_md, mode, lov_lockhp);
1863                 rc = lov_update_common_set(set, req, rc);
1864                 if (rc) {
1865                         CERROR("error: cancel objid "LPX64" subobj "
1866                                LPX64" on OST idx %d: rc = %d\n",
1867                                lsm->lsm_object_id,
1868                                req->rq_oi.oi_md->lsm_object_id,
1869                                req->rq_idx, rc);
1870                         err = rc;
1871                 }
1872
1873         }
1874         lov_fini_cancel_set(set);
1875         RETURN(err);
1876 }
1877
1878 static int lov_cancel_unused(struct obd_export *exp,
1879                              struct lov_stripe_md *lsm,
1880                              ldlm_cancel_flags_t flags, void *opaque)
1881 {
1882         struct lov_obd *lov;
1883         int rc = 0, i;
1884         ENTRY;
1885
1886         if (!exp || !exp->exp_obd)
1887                 RETURN(-ENODEV);
1888
1889         lov = &exp->exp_obd->u.lov;
1890         if (lsm == NULL) {
1891                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1892                         int err;
1893                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1894                                 continue;
1895
1896                         err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
1897                                                 flags, opaque);
1898                         if (!rc)
1899                                 rc = err;
1900                 }
1901                 RETURN(rc);
1902         }
1903
1904         ASSERT_LSM_MAGIC(lsm);
1905
1906         LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
1907         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1908                 struct lov_stripe_md submd;
1909                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1910                 int err;
1911
1912                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1913                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
1914                         continue;
1915                 }
1916
1917                 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
1918                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1919
1920                 submd.lsm_object_id = loi->loi_id;
1921                 submd.lsm_object_seq = loi->loi_seq;
1922                 submd.lsm_stripe_count = 0;
1923                 err = obd_cancel_unused(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1924                                         &submd, flags, opaque);
1925                 if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1926                         CERROR("error: cancel unused objid "LPX64" subobj "LPX64
1927                                " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
1928                                loi->loi_id, loi->loi_ost_idx, err);
1929                         if (!rc)
1930                                 rc = err;
1931                 }
1932         }
1933         RETURN(rc);
1934 }
1935
1936 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1937 {
1938         struct lov_request_set *lovset = (struct lov_request_set *)data;
1939         int err;
1940         ENTRY;
1941
1942         if (rc)
1943                 lovset->set_completes = 0;
1944
1945         err = lov_fini_statfs_set(lovset);
1946         RETURN(rc ? rc : err);
1947 }
1948
1949 static int lov_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
1950                             __u64 max_age, struct ptlrpc_request_set *rqset)
1951 {
1952         struct lov_request_set *set;
1953         struct lov_request *req;
1954         cfs_list_t *pos;
1955         struct lov_obd *lov;
1956         int rc = 0;
1957         ENTRY;
1958
1959         LASSERT(oinfo != NULL);
1960         LASSERT(oinfo->oi_osfs != NULL);
1961
1962         lov = &obd->u.lov;
1963         rc = lov_prep_statfs_set(obd, oinfo, &set);
1964         if (rc)
1965                 RETURN(rc);
1966
1967         cfs_list_for_each (pos, &set->set_list) {
1968                 struct obd_device *osc_obd;
1969
1970                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1971
1972                 osc_obd = class_exp2obd(lov->lov_tgts[req->rq_idx]->ltd_exp);
1973                 rc = obd_statfs_async(osc_obd, &req->rq_oi, max_age, rqset);
1974                 if (rc)
1975                         break;
1976         }
1977
1978         if (rc || cfs_list_empty(&rqset->set_requests)) {
1979                 int err;
1980                 if (rc)
1981                         set->set_completes = 0;
1982                 err = lov_fini_statfs_set(set);
1983                 RETURN(rc ? rc : err);
1984         }
1985
1986         LASSERT(rqset->set_interpret == NULL);
1987         rqset->set_interpret = lov_statfs_interpret;
1988         rqset->set_arg = (void *)set;
1989         RETURN(0);
1990 }
1991
1992 static int lov_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1993                       __u64 max_age, __u32 flags)
1994 {
1995         struct ptlrpc_request_set *set = NULL;
1996         struct obd_info oinfo = { { { 0 } } };
1997         int rc = 0;
1998         ENTRY;
1999
2000
2001         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
2002          * statfs requests */
2003         set = ptlrpc_prep_set();
2004         if (set == NULL)
2005                 RETURN(-ENOMEM);
2006
2007         oinfo.oi_osfs = osfs;
2008         oinfo.oi_flags = flags;
2009         rc = lov_statfs_async(obd, &oinfo, max_age, set);
2010         if (rc == 0)
2011                 rc = ptlrpc_set_wait(set);
2012         ptlrpc_set_destroy(set);
2013
2014         RETURN(rc);
2015 }
2016
2017 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2018                          void *karg, void *uarg)
2019 {
2020         struct obd_device *obddev = class_exp2obd(exp);
2021         struct lov_obd *lov = &obddev->u.lov;
2022         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
2023         struct obd_uuid *uuidp;
2024         ENTRY;
2025
2026         switch (cmd) {
2027         case IOC_OBD_STATFS: {
2028                 struct obd_ioctl_data *data = karg;
2029                 struct obd_device *osc_obd;
2030                 struct obd_statfs stat_buf = {0};
2031                 __u32 index;
2032
2033                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
2034                 if ((index >= count))
2035                         RETURN(-ENODEV);
2036
2037                 if (!lov->lov_tgts[index])
2038                         /* Try again with the next index */
2039                         RETURN(-EAGAIN);
2040                 if (!lov->lov_tgts[index]->ltd_active)
2041                         RETURN(-ENODATA);
2042
2043                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
2044                 if (!osc_obd)
2045                         RETURN(-EINVAL);
2046
2047                 /* copy UUID */
2048                 if (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
2049                                      min((int) data->ioc_plen2,
2050                                          (int) sizeof(struct obd_uuid))))
2051                         RETURN(-EFAULT);
2052
2053                 /* got statfs data */
2054                 rc = obd_statfs(osc_obd, &stat_buf,
2055                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
2056                                 0);
2057                 if (rc)
2058                         RETURN(rc);
2059                 if (cfs_copy_to_user(data->ioc_pbuf1, &stat_buf,
2060                                      min((int) data->ioc_plen1,
2061                                          (int) sizeof(stat_buf))))
2062                         RETURN(-EFAULT);
2063                 break;
2064         }
2065         case OBD_IOC_LOV_GET_CONFIG: {
2066                 struct obd_ioctl_data *data;
2067                 struct lov_desc *desc;
2068                 char *buf = NULL;
2069                 __u32 *genp;
2070
2071                 len = 0;
2072                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
2073                         RETURN(-EINVAL);
2074
2075                 data = (struct obd_ioctl_data *)buf;
2076
2077                 if (sizeof(*desc) > data->ioc_inllen1) {
2078                         obd_ioctl_freedata(buf, len);
2079                         RETURN(-EINVAL);
2080                 }
2081
2082                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
2083                         obd_ioctl_freedata(buf, len);
2084                         RETURN(-EINVAL);
2085                 }
2086
2087                 if (sizeof(__u32) * count > data->ioc_inllen3) {
2088                         obd_ioctl_freedata(buf, len);
2089                         RETURN(-EINVAL);
2090                 }
2091
2092                 desc = (struct lov_desc *)data->ioc_inlbuf1;
2093                 memcpy(desc, &(lov->desc), sizeof(*desc));
2094
2095                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2096                 genp = (__u32 *)data->ioc_inlbuf3;
2097                 /* the uuid will be empty for deleted OSTs */
2098                 for (i = 0; i < count; i++, uuidp++, genp++) {
2099                         if (!lov->lov_tgts[i])
2100                                 continue;
2101                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
2102                         *genp = lov->lov_tgts[i]->ltd_gen;
2103                 }
2104
2105                 if (cfs_copy_to_user((void *)uarg, buf, len))
2106                         rc = -EFAULT;
2107                 obd_ioctl_freedata(buf, len);
2108                 break;
2109         }
2110         case LL_IOC_LOV_SETSTRIPE:
2111                 rc = lov_setstripe(exp, len, karg, uarg);
2112                 break;
2113         case LL_IOC_LOV_GETSTRIPE:
2114                 rc = lov_getstripe(exp, karg, uarg);
2115                 break;
2116         case LL_IOC_LOV_SETEA:
2117                 rc = lov_setea(exp, karg, uarg);
2118                 break;
2119         case OBD_IOC_QUOTACTL: {
2120                 struct if_quotactl *qctl = karg;
2121                 struct lov_tgt_desc *tgt = NULL;
2122                 struct obd_quotactl *oqctl;
2123
2124                 if (qctl->qc_valid == QC_OSTIDX) {
2125                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
2126                                 RETURN(-EINVAL);
2127
2128                         tgt = lov->lov_tgts[qctl->qc_idx];
2129                         if (!tgt || !tgt->ltd_exp)
2130                                 RETURN(-EINVAL);
2131                 } else if (qctl->qc_valid == QC_UUID) {
2132                         for (i = 0; i < count; i++) {
2133                                 tgt = lov->lov_tgts[i];
2134                                 if (!tgt ||
2135                                     !obd_uuid_equals(&tgt->ltd_uuid,
2136                                                      &qctl->obd_uuid))
2137                                         continue;
2138
2139                                 if (tgt->ltd_exp == NULL)
2140                                         RETURN(-EINVAL);
2141
2142                                 break;
2143                         }
2144                 } else {
2145                         RETURN(-EINVAL);
2146                 }
2147
2148                 if (i >= count)
2149                         RETURN(-EAGAIN);
2150
2151                 LASSERT(tgt && tgt->ltd_exp);
2152                 OBD_ALLOC_PTR(oqctl);
2153                 if (!oqctl)
2154                         RETURN(-ENOMEM);
2155
2156                 QCTL_COPY(oqctl, qctl);
2157                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2158                 if (rc == 0) {
2159                         QCTL_COPY(qctl, oqctl);
2160                         qctl->qc_valid = QC_OSTIDX;
2161                         qctl->obd_uuid = tgt->ltd_uuid;
2162                 }
2163                 OBD_FREE_PTR(oqctl);
2164                 break;
2165         }
2166         default: {
2167                 int set = 0;
2168
2169                 if (count == 0)
2170                         RETURN(-ENOTTY);
2171
2172                 for (i = 0; i < count; i++) {
2173                         int err;
2174
2175                         /* OST was disconnected */
2176                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2177                                 continue;
2178
2179                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2180                                             len, karg, uarg);
2181                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2182                                 RETURN(err);
2183                         } else if (err) {
2184                                 if (lov->lov_tgts[i]->ltd_active) {
2185                                         CDEBUG(err == -ENOTTY ?
2186                                                D_IOCTL : D_WARNING,
2187                                                "iocontrol OSC %s on OST "
2188                                                "idx %d cmd %x: err = %d\n",
2189                                                lov_uuid2str(lov, i),
2190                                                i, cmd, err);
2191                                         if (!rc)
2192                                                 rc = err;
2193                                 }
2194                         } else {
2195                                 set = 1;
2196                         }
2197                 }
2198                 if (!set && !rc)
2199                         rc = -EIO;
2200         }
2201         }
2202
2203         RETURN(rc);
2204 }
2205
2206 #define FIEMAP_BUFFER_SIZE 4096
2207
2208 /**
2209  * Non-zero fe_logical indicates that this is a continuation FIEMAP
2210  * call. The local end offset and the device are sent in the first
2211  * fm_extent. This function calculates the stripe number from the index.
2212  * This function returns a stripe_no on which mapping is to be restarted.
2213  *
2214  * This function returns fm_end_offset which is the in-OST offset at which
2215  * mapping should be restarted. If fm_end_offset=0 is returned then caller
2216  * will re-calculate proper offset in next stripe.
2217  * Note that the first extent is passed to lov_get_info via the value field.
2218  *
2219  * \param fiemap fiemap request header
2220  * \param lsm striping information for the file
2221  * \param fm_start logical start of mapping
2222  * \param fm_end logical end of mapping
2223  * \param start_stripe starting stripe will be returned in this
2224  */
2225 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
2226                                    struct lov_stripe_md *lsm, obd_size fm_start,
2227                                    obd_size fm_end, int *start_stripe)
2228 {
2229         obd_size local_end = fiemap->fm_extents[0].fe_logical;
2230         obd_off lun_start, lun_end;
2231         obd_size fm_end_offset;
2232         int stripe_no = -1, i;
2233
2234         if (fiemap->fm_extent_count == 0 ||
2235             fiemap->fm_extents[0].fe_logical == 0)
2236                 return 0;
2237
2238         /* Find out stripe_no from ost_index saved in the fe_device */
2239         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2240                 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
2241                                         fiemap->fm_extents[0].fe_device) {
2242                         stripe_no = i;
2243                         break;
2244                 }
2245         }
2246
2247         /* If we have finished mapping on previous device, shift logical
2248          * offset to start of next device */
2249         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
2250                                    &lun_start, &lun_end)) != 0 &&
2251                                    local_end < lun_end) {
2252                 fm_end_offset = local_end;
2253                 *start_stripe = stripe_no;
2254         } else {
2255                 /* This is a special value to indicate that caller should
2256                  * calculate offset in next stripe. */
2257                 fm_end_offset = 0;
2258                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
2259         }
2260
2261         return fm_end_offset;
2262 }
2263
2264 /**
2265  * We calculate on which OST the mapping will end. If the length of mapping
2266  * is greater than (stripe_size * stripe_count) then the last_stripe will
2267  * will be one just before start_stripe. Else we check if the mapping
2268  * intersects each OST and find last_stripe.
2269  * This function returns the last_stripe and also sets the stripe_count
2270  * over which the mapping is spread
2271  *
2272  * \param lsm striping information for the file
2273  * \param fm_start logical start of mapping
2274  * \param fm_end logical end of mapping
2275  * \param start_stripe starting stripe of the mapping
2276  * \param stripe_count the number of stripes across which to map is returned
2277  *
2278  * \retval last_stripe return the last stripe of the mapping
2279  */
2280 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
2281                             obd_size fm_end, int start_stripe,
2282                             int *stripe_count)
2283 {
2284         int last_stripe;
2285         obd_off obd_start, obd_end;
2286         int i, j;
2287
2288         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
2289                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
2290                                                               start_stripe - 1);
2291                 *stripe_count = lsm->lsm_stripe_count;
2292         } else {
2293                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
2294                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
2295                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
2296                                                    &obd_start, &obd_end)) == 0)
2297                                 break;
2298                 }
2299                 *stripe_count = j;
2300                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
2301         }
2302
2303         return last_stripe;
2304 }
2305
2306 /**
2307  * Set fe_device and copy extents from local buffer into main return buffer.
2308  *
2309  * \param fiemap fiemap request header
2310  * \param lcl_fm_ext array of local fiemap extents to be copied
2311  * \param ost_index OST index to be written into the fm_device field for each
2312                     extent
2313  * \param ext_count number of extents to be copied
2314  * \param current_extent where to start copying in main extent array
2315  */
2316 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
2317                                   struct ll_fiemap_extent *lcl_fm_ext,
2318                                   int ost_index, unsigned int ext_count,
2319                                   int current_extent)
2320 {
2321         char *to;
2322         int ext;
2323
2324         for (ext = 0; ext < ext_count; ext++) {
2325                 lcl_fm_ext[ext].fe_device = ost_index;
2326                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
2327         }
2328
2329         /* Copy fm_extent's from fm_local to return buffer */
2330         to = (char *)fiemap + fiemap_count_to_size(current_extent);
2331         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
2332 }
2333
2334 /**
2335  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
2336  * This also handles the restarting of FIEMAP calls in case mapping overflows
2337  * the available number of extents in single call.
2338  */
2339 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
2340                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
2341 {
2342         struct ll_fiemap_info_key *fm_key = key;
2343         struct ll_user_fiemap *fiemap = val;
2344         struct ll_user_fiemap *fm_local = NULL;
2345         struct ll_fiemap_extent *lcl_fm_ext;
2346         int count_local;
2347         unsigned int get_num_extents = 0;
2348         int ost_index = 0, actual_start_stripe, start_stripe;
2349         obd_size fm_start, fm_end, fm_length, fm_end_offset = 0;
2350         obd_size curr_loc;
2351         int current_extent = 0, rc = 0, i;
2352         int ost_eof = 0; /* EOF for object */
2353         int ost_done = 0; /* done with required mapping for this OST? */
2354         int last_stripe;
2355         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
2356         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
2357
2358         if (lsm == NULL)
2359                 GOTO(out, rc = 0);
2360
2361         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
2362                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
2363
2364         OBD_ALLOC(fm_local, buffer_size);
2365         if (fm_local == NULL)
2366                 GOTO(out, rc = -ENOMEM);
2367         lcl_fm_ext = &fm_local->fm_extents[0];
2368
2369         count_local = fiemap_size_to_count(buffer_size);
2370
2371         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
2372         fm_start = fiemap->fm_start;
2373         fm_length = fiemap->fm_length;
2374         /* Calculate start stripe, last stripe and length of mapping */
2375         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
2376         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
2377                                                 fm_start + fm_length - 1);
2378         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
2379         if (fm_end > fm_key->oa.o_size)
2380                 fm_end = fm_key->oa.o_size;
2381
2382         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
2383                                             actual_start_stripe, &stripe_count);
2384
2385         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start, fm_end,
2386                                                   &start_stripe);
2387
2388         if (fiemap->fm_extent_count == 0) {
2389                 get_num_extents = 1;
2390                 count_local = 0;
2391         }
2392
2393         /* Check each stripe */
2394         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
2395              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
2396                 obd_size req_fm_len; /* Stores length of required mapping */
2397                 obd_size len_mapped_single_call;
2398                 obd_off lun_start, lun_end, obd_object_end;
2399                 unsigned int ext_count;
2400
2401                 cur_stripe_wrap = cur_stripe;
2402
2403                 /* Find out range of mapping on this stripe */
2404                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
2405                                            &lun_start, &obd_object_end)) == 0)
2406                         continue;
2407
2408                 /* If this is a continuation FIEMAP call and we are on
2409                  * starting stripe then lun_start needs to be set to
2410                  * fm_end_offset */
2411                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
2412                         lun_start = fm_end_offset;
2413
2414                 if (fm_length != ~0ULL) {
2415                         /* Handle fm_start + fm_length overflow */
2416                         if (fm_start + fm_length < fm_start)
2417                                 fm_length = ~0ULL - fm_start;
2418                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
2419                                                      cur_stripe);
2420                 } else {
2421                         lun_end = ~0ULL;
2422                 }
2423
2424                 if (lun_start == lun_end)
2425                         continue;
2426
2427                 req_fm_len = obd_object_end - lun_start;
2428                 fm_local->fm_length = 0;
2429                 len_mapped_single_call = 0;
2430
2431                 /* If the output buffer is very large and the objects have many
2432                  * extents we may need to loop on a single OST repeatedly */
2433                 ost_eof = 0;
2434                 ost_done = 0;
2435                 do {
2436                         if (get_num_extents == 0) {
2437                                 /* Don't get too many extents. */
2438                                 if (current_extent + count_local >
2439                                     fiemap->fm_extent_count)
2440                                         count_local = fiemap->fm_extent_count -
2441                                                                  current_extent;
2442                         }
2443
2444                         lun_start += len_mapped_single_call;
2445                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
2446                         req_fm_len = fm_local->fm_length;
2447                         fm_local->fm_extent_count = count_local;
2448                         fm_local->fm_mapped_extents = 0;
2449                         fm_local->fm_flags = fiemap->fm_flags;
2450
2451                         fm_key->oa.o_id = lsm->lsm_oinfo[cur_stripe]->loi_id;
2452                         fm_key->oa.o_seq = lsm->lsm_oinfo[cur_stripe]->loi_seq;
2453                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
2454
2455                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
2456                                 GOTO(out, rc = -EINVAL);
2457
2458                         /* If OST is inactive, return extent with UNKNOWN flag */
2459                         if (!lov->lov_tgts[ost_index]->ltd_active) {
2460                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
2461                                 fm_local->fm_mapped_extents = 1;
2462
2463                                 lcl_fm_ext[0].fe_logical = lun_start;
2464                                 lcl_fm_ext[0].fe_length = obd_object_end -
2465                                                                       lun_start;
2466                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
2467
2468                                 goto inactive_tgt;
2469                         }
2470
2471                         fm_local->fm_start = lun_start;
2472                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
2473                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
2474                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
2475                         rc = obd_get_info(lov->lov_tgts[ost_index]->ltd_exp,
2476                                           keylen, key, vallen, fm_local, lsm);
2477                         if (rc != 0)
2478                                 GOTO(out, rc);
2479
2480 inactive_tgt:
2481                         ext_count = fm_local->fm_mapped_extents;
2482                         if (ext_count == 0) {
2483                                 ost_done = 1;
2484                                 /* If last stripe has hole at the end,
2485                                  * then we need to return */
2486                                 if (cur_stripe_wrap == last_stripe) {
2487                                         fiemap->fm_mapped_extents = 0;
2488                                         goto finish;
2489                                 }
2490                                 break;
2491                         }
2492
2493                         /* If we just need num of extents then go to next device */
2494                         if (get_num_extents) {
2495                                 current_extent += ext_count;
2496                                 break;
2497                         }
2498
2499                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2500                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2501
2502                         /* Have we finished mapping on this device? */
2503                         if (req_fm_len <= len_mapped_single_call)
2504                                 ost_done = 1;
2505
2506                         /* Clear the EXTENT_LAST flag which can be present on
2507                          * last extent */
2508                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2509                                 lcl_fm_ext[ext_count - 1].fe_flags &=
2510                                                             ~FIEMAP_EXTENT_LAST;
2511
2512                         curr_loc = lov_stripe_size(lsm,
2513                                            lcl_fm_ext[ext_count - 1].fe_logical+
2514                                            lcl_fm_ext[ext_count - 1].fe_length,
2515                                            cur_stripe);
2516                         if (curr_loc >= fm_key->oa.o_size)
2517                                 ost_eof = 1;
2518
2519                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2520                                                      ost_index, ext_count,
2521                                                      current_extent);
2522
2523                         current_extent += ext_count;
2524
2525                         /* Ran out of available extents? */
2526                         if (current_extent >= fiemap->fm_extent_count)
2527                                 goto finish;
2528                 } while (ost_done == 0 && ost_eof == 0);
2529
2530                 if (cur_stripe_wrap == last_stripe)
2531                         goto finish;
2532         }
2533
2534 finish:
2535         /* Indicate that we are returning device offsets unless file just has
2536          * single stripe */
2537         if (lsm->lsm_stripe_count > 1)
2538                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2539
2540         if (get_num_extents)
2541                 goto skip_last_device_calc;
2542
2543         /* Check if we have reached the last stripe and whether mapping for that
2544          * stripe is done. */
2545         if (cur_stripe_wrap == last_stripe) {
2546                 if (ost_done || ost_eof)
2547                         fiemap->fm_extents[current_extent - 1].fe_flags |=
2548                                                              FIEMAP_EXTENT_LAST;
2549         }
2550
2551 skip_last_device_calc:
2552         fiemap->fm_mapped_extents = current_extent;
2553
2554 out:
2555         OBD_FREE(fm_local, buffer_size);
2556         return rc;
2557 }
2558
2559 static int lov_get_info(struct obd_export *exp, __u32 keylen,
2560                         void *key, __u32 *vallen, void *val,
2561                         struct lov_stripe_md *lsm)
2562 {
2563         struct obd_device *obddev = class_exp2obd(exp);
2564         struct lov_obd *lov = &obddev->u.lov;
2565         int i, rc;
2566         ENTRY;
2567
2568         if (!vallen || !val)
2569                 RETURN(-EFAULT);
2570
2571         obd_getref(obddev);
2572
2573         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2574                 struct {
2575                         char name[16];
2576                         struct ldlm_lock *lock;
2577                 } *data = key;
2578                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2579                 struct lov_oinfo *loi;
2580                 __u32 *stripe = val;
2581
2582                 if (*vallen < sizeof(*stripe))
2583                         GOTO(out, rc = -EFAULT);
2584                 *vallen = sizeof(*stripe);
2585
2586                 /* XXX This is another one of those bits that will need to
2587                  * change if we ever actually support nested LOVs.  It uses
2588                  * the lock's export to find out which stripe it is. */
2589                 /* XXX - it's assumed all the locks for deleted OSTs have
2590                  * been cancelled. Also, the export for deleted OSTs will
2591                  * be NULL and won't match the lock's export. */
2592                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2593                         loi = lsm->lsm_oinfo[i];
2594                         if (!lov->lov_tgts[loi->loi_ost_idx])
2595                                 continue;
2596                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2597                             data->lock->l_conn_export &&
2598                             osc_res_name_eq(loi->loi_id, loi->loi_seq, res_id)) {
2599                                 *stripe = i;
2600                                 GOTO(out, rc = 0);
2601                         }
2602                 }
2603                 LDLM_ERROR(data->lock, "lock on inode without such object");
2604                 dump_lsm(D_ERROR, lsm);
2605                 GOTO(out, rc = -ENXIO);
2606         } else if (KEY_IS(KEY_LAST_ID)) {
2607                 struct obd_id_info *info = val;
2608                 __u32 size = sizeof(obd_id);
2609                 struct lov_tgt_desc *tgt;
2610
2611                 LASSERT(*vallen == sizeof(struct obd_id_info));
2612                 tgt = lov->lov_tgts[info->idx];
2613
2614                 if (!tgt || !tgt->ltd_active)
2615                         GOTO(out, rc = -ESRCH);
2616
2617                 rc = obd_get_info(tgt->ltd_exp, keylen, key, &size, info->data, NULL);
2618                 GOTO(out, rc = 0);
2619         } else if (KEY_IS(KEY_LOVDESC)) {
2620                 struct lov_desc *desc_ret = val;
2621                 *desc_ret = lov->desc;
2622
2623                 GOTO(out, rc = 0);
2624         } else if (KEY_IS(KEY_FIEMAP)) {
2625                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2626                 GOTO(out, rc);
2627         } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2628                 struct lov_tgt_desc *tgt;
2629                 __u64 ost_idx = *((__u64*)val);
2630
2631                 LASSERT(*vallen == sizeof(__u64));
2632                 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2633                 tgt = lov->lov_tgts[ost_idx];
2634
2635                 if (!tgt || !tgt->ltd_exp)
2636                         GOTO(out, rc = -ESRCH);
2637
2638                 *((__u64*)val) = tgt->ltd_exp->exp_connect_flags;
2639                 GOTO(out, rc = 0);
2640         }
2641
2642         rc = -EINVAL;
2643
2644 out:
2645         obd_putref(obddev);
2646         RETURN(rc);
2647 }
2648
2649 static int lov_set_info_async(struct obd_export *exp, obd_count keylen,
2650                               void *key, obd_count vallen, void *val,
2651                               struct ptlrpc_request_set *set)
2652 {
2653         struct obd_device *obddev = class_exp2obd(exp);
2654         struct lov_obd *lov = &obddev->u.lov;
2655         obd_count count;
2656         int i, rc = 0, err;
2657         struct lov_tgt_desc *tgt;
2658         unsigned incr, check_uuid,
2659                  do_inactive, no_set;
2660         unsigned next_id = 0,  mds_con = 0, capa = 0;
2661         ENTRY;
2662
2663         incr = check_uuid = do_inactive = no_set = 0;
2664         if (set == NULL) {
2665                 no_set = 1;
2666                 set = ptlrpc_prep_set();
2667                 if (!set)
2668                         RETURN(-ENOMEM);
2669         }
2670
2671         obd_getref(obddev);
2672         count = lov->desc.ld_tgt_count;
2673
2674         if (KEY_IS(KEY_NEXT_ID)) {
2675                 count = vallen / sizeof(struct obd_id_info);
2676                 vallen = sizeof(obd_id);
2677                 incr = sizeof(struct obd_id_info);
2678                 do_inactive = 1;
2679                 next_id = 1;
2680         } else if (KEY_IS(KEY_CHECKSUM)) {
2681                 do_inactive = 1;
2682         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2683                 /* use defaults:  do_inactive = incr = 0; */
2684         } else if (KEY_IS(KEY_MDS_CONN)) {
2685                 mds_con = 1;
2686         } else if (KEY_IS(KEY_CAPA_KEY)) {
2687                 capa = 1;
2688         }
2689
2690         for (i = 0; i < count; i++, val = (char *)val + incr) {
2691                 if (next_id) {
2692                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2693                 } else {
2694                         tgt = lov->lov_tgts[i];
2695                 }
2696                 /* OST was disconnected */
2697                 if (!tgt || !tgt->ltd_exp)
2698                         continue;
2699
2700                 /* OST is inactive and we don't want inactive OSCs */
2701                 if (!tgt->ltd_active && !do_inactive)
2702                         continue;
2703
2704                 if (mds_con) {
2705                         struct mds_group_info *mgi;
2706
2707                         LASSERT(vallen == sizeof(*mgi));
2708                         mgi = (struct mds_group_info *)val;
2709
2710                         /* Only want a specific OSC */
2711                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2712                                                 &tgt->ltd_uuid))
2713                                 continue;
2714
2715                         err = obd_set_info_async(tgt->ltd_exp,
2716                                          keylen, key, sizeof(int),
2717                                          &mgi->group, set);
2718                 } else if (next_id) {
2719                         err = obd_set_info_async(tgt->ltd_exp,
2720                                          keylen, key, vallen,
2721                                          ((struct obd_id_info*)val)->data, set);
2722                 } else if (capa) {
2723                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2724
2725                         LASSERT(vallen == sizeof(*info));
2726
2727                          /* Only want a specific OSC */
2728                         if (info->uuid &&
2729                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2730                                 continue;
2731
2732                         err = obd_set_info_async(tgt->ltd_exp, keylen, key,
2733                                                  sizeof(*info->capa),
2734                                                  info->capa, set);
2735                        
2736                 } else {
2737                         /* Only want a specific OSC */
2738                         if (check_uuid &&
2739                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2740                                 continue;
2741
2742                         err = obd_set_info_async(tgt->ltd_exp,
2743                                          keylen, key, vallen, val, set);
2744                 }
2745
2746                 if (!rc)
2747                         rc = err;
2748         }
2749
2750         obd_putref(obddev);
2751         if (no_set) {
2752                 err = ptlrpc_set_wait(set);
2753                 if (!rc)
2754                         rc = err;
2755                 ptlrpc_set_destroy(set);
2756         }
2757         RETURN(rc);
2758 }
2759
2760 int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm)
2761 {
2762         int i, rc = 0;
2763         ENTRY;
2764
2765         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2766                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2767                 if (loi->loi_ar.ar_rc && !rc)
2768                         rc = loi->loi_ar.ar_rc;
2769                 loi->loi_ar.ar_rc = 0;
2770         }
2771         RETURN(rc);
2772 }
2773 EXPORT_SYMBOL(lov_test_and_clear_async_rc);
2774
2775
2776 static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm,
2777                            int cmd, __u64 *offset)
2778 {
2779         __u32 ssize = lsm->lsm_stripe_size;
2780         __u64 start;
2781
2782         start = *offset;
2783         do_div(start, ssize);
2784         start = start * ssize;
2785
2786         CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64
2787                            ", end "LPU64"\n", *offset, ssize, start,
2788                            start + ssize - 1);
2789         if (cmd == OBD_CALC_STRIPE_END) {
2790                 *offset = start + ssize - 1;
2791         } else if (cmd == OBD_CALC_STRIPE_START) {
2792                 *offset = start;
2793         } else {
2794                 LBUG();
2795         }
2796
2797         RETURN(0);
2798 }
2799
2800 void lov_stripe_lock(struct lov_stripe_md *md)
2801 {
2802         LASSERT(md->lsm_lock_owner != cfs_curproc_pid());
2803         cfs_spin_lock(&md->lsm_lock);
2804         LASSERT(md->lsm_lock_owner == 0);
2805         md->lsm_lock_owner = cfs_curproc_pid();
2806 }
2807 EXPORT_SYMBOL(lov_stripe_lock);
2808
2809 void lov_stripe_unlock(struct lov_stripe_md *md)
2810 {
2811         LASSERT(md->lsm_lock_owner == cfs_curproc_pid());
2812         md->lsm_lock_owner = 0;
2813         cfs_spin_unlock(&md->lsm_lock);
2814 }
2815 EXPORT_SYMBOL(lov_stripe_unlock);
2816
2817
2818 struct obd_ops lov_obd_ops = {
2819         .o_owner               = THIS_MODULE,
2820         .o_setup               = lov_setup,
2821         .o_precleanup          = lov_precleanup,
2822         .o_cleanup             = lov_cleanup,
2823         //.o_process_config      = lov_process_config,
2824         .o_connect             = lov_connect,
2825         .o_disconnect          = lov_disconnect,
2826         .o_statfs              = lov_statfs,
2827         .o_statfs_async        = lov_statfs_async,
2828         .o_packmd              = lov_packmd,
2829         .o_unpackmd            = lov_unpackmd,
2830         .o_create              = lov_create,
2831         .o_destroy             = lov_destroy,
2832         .o_getattr             = lov_getattr,
2833         .o_getattr_async       = lov_getattr_async,
2834         .o_setattr             = lov_setattr,
2835         .o_setattr_async       = lov_setattr_async,
2836         .o_brw                 = lov_brw,
2837         .o_merge_lvb           = lov_merge_lvb,
2838         .o_adjust_kms          = lov_adjust_kms,
2839         .o_punch               = lov_punch,
2840         .o_sync                = lov_sync,
2841         .o_enqueue             = lov_enqueue,
2842         .o_change_cbdata       = lov_change_cbdata,
2843         .o_find_cbdata         = lov_find_cbdata,
2844         .o_cancel              = lov_cancel,
2845         .o_cancel_unused       = lov_cancel_unused,
2846         .o_iocontrol           = lov_iocontrol,
2847         .o_get_info            = lov_get_info,
2848         .o_set_info_async      = lov_set_info_async,
2849         .o_extent_calc         = lov_extent_calc,
2850         .o_llog_init           = lov_llog_init,
2851         .o_llog_finish         = lov_llog_finish,
2852         .o_notify              = lov_notify,
2853         .o_pool_new            = lov_pool_new,
2854         .o_pool_rem            = lov_pool_remove,
2855         .o_pool_add            = lov_pool_add,
2856         .o_pool_del            = lov_pool_del,
2857         .o_getref              = lov_getref,
2858         .o_putref              = lov_putref,
2859         .o_sync_fs             = lov_sync_fs,
2860 };
2861
2862 static quota_interface_t *quota_interface;
2863 extern quota_interface_t lov_quota_interface;
2864
2865 cfs_mem_cache_t *lov_oinfo_slab;
2866
2867 extern struct lu_kmem_descr lov_caches[];
2868
2869 int __init lov_init(void)
2870 {
2871         struct lprocfs_static_vars lvars = { 0 };
2872         int rc, rc2;
2873         ENTRY;
2874
2875         /* print an address of _any_ initialized kernel symbol from this
2876          * module, to allow debugging with gdb that doesn't support data
2877          * symbols from modules.*/
2878         CDEBUG(D_CONSOLE, "Lustre LOV module (%p).\n", &lov_caches);
2879
2880         rc = lu_kmem_init(lov_caches);
2881         if (rc)
2882                 return rc;
2883
2884         lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo",
2885                                               sizeof(struct lov_oinfo),
2886                                               0, CFS_SLAB_HWCACHE_ALIGN);
2887         if (lov_oinfo_slab == NULL) {
2888                 lu_kmem_fini(lov_caches);
2889                 return -ENOMEM;
2890         }
2891         lprocfs_lov_init_vars(&lvars);
2892
2893         cfs_request_module("lquota");
2894         quota_interface = PORTAL_SYMBOL_GET(lov_quota_interface);
2895         init_obd_quota_ops(quota_interface, &lov_obd_ops);
2896
2897         rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
2898                                  LUSTRE_LOV_NAME, &lov_device_type);
2899
2900         if (rc) {
2901                 if (quota_interface)
2902                         PORTAL_SYMBOL_PUT(lov_quota_interface);
2903                 rc2 = cfs_mem_cache_destroy(lov_oinfo_slab);
2904                 LASSERT(rc2 == 0);
2905                 lu_kmem_fini(lov_caches);
2906         }
2907
2908         RETURN(rc);
2909 }
2910
2911 #ifdef __KERNEL__
2912 static void /*__exit*/ lov_exit(void)
2913 {
2914         int rc;
2915
2916         lu_device_type_fini(&lov_device_type);
2917         lu_kmem_fini(lov_caches);
2918
2919         if (quota_interface)
2920                 PORTAL_SYMBOL_PUT(lov_quota_interface);
2921
2922         class_unregister_type(LUSTRE_LOV_NAME);
2923         rc = cfs_mem_cache_destroy(lov_oinfo_slab);
2924         LASSERT(rc == 0);
2925 }
2926
2927 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2928 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2929 MODULE_LICENSE("GPL");
2930
2931 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
2932 #endif