lustre/lov/lov_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  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 #define DEBUG_SUBSYSTEM S_LOV
  45 #ifdef __KERNEL__
  46 #include <libcfs/libcfs.h>
  47 #else
  48 #include <liblustre.h>
  49 #endif
  50
  51 #include <obd_support.h>
  52 #include <lustre_lib.h>
  53 #include <lustre_net.h>
  54 #include <lustre/lustre_idl.h>
  55 #include <lustre_dlm.h>
  56 #include <lustre_mds.h>
  57 #include <lustre_debug.h>
  58 #include <obd_class.h>
  59 #include <obd_lov.h>
  60 #include <obd_ost.h>
  61 #include <lprocfs_status.h>
  62 #include <lustre_param.h>
  63 #include <cl_object.h>
  64 #include <lustre/ll_fiemap.h>
  65 #include <lustre_log.h>
  66
  67 #include "lov_internal.h"
  68
  69 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  70    Any function that expects lov_tgts to remain stationary must take a ref. */
  71 static void lov_getref(struct obd_device *obd)
  72 {
  73         struct lov_obd *lov = &obd->u.lov;
  74
  75         /* nobody gets through here until lov_putref is done */
  76         cfs_mutex_lock(&lov->lov_lock);
  77         cfs_atomic_inc(&lov->lov_refcount);
  78         cfs_mutex_unlock(&lov->lov_lock);
  79         return;
  80 }
  81
  82 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  83
  84 static void lov_putref(struct obd_device *obd)
  85 {
  86         struct lov_obd *lov = &obd->u.lov;
  87
  88         cfs_mutex_lock(&lov->lov_lock);
  89         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  90         if (cfs_atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  91                 CFS_LIST_HEAD(kill);
  92                 int i;
  93                 struct lov_tgt_desc *tgt, *n;
  94                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  95                        lov->lov_death_row);
  96                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  97                         tgt = lov->lov_tgts[i];
  98
  99                         if (!tgt || !tgt->ltd_reap)
 100                                 continue;
 101                         cfs_list_add(&tgt->ltd_kill, &kill);
 102                         /* XXX - right now there is a dependency on ld_tgt_count
 103                          * being the maximum tgt index for computing the
 104                          * mds_max_easize. So we can't shrink it. */
 105                         lov_ost_pool_remove(&lov->lov_packed, i);
 106                         lov->lov_tgts[i] = NULL;
 107                         lov->lov_death_row--;
 108                 }
 109                 cfs_mutex_unlock(&lov->lov_lock);
 110
 111                 cfs_list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 112                         cfs_list_del(&tgt->ltd_kill);
 113                         /* Disconnect */
 114                         __lov_del_obd(obd, tgt);
 115                 }
 116         } else {
 117                 cfs_mutex_unlock(&lov->lov_lock);
 118         }
 119 }
 120
 121 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 122                               enum obd_notify_event ev);
 123 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 124                       enum obd_notify_event ev, void *data);
 125
 126
 127 #define MAX_STRING_SIZE 128
 128 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 129                     struct obd_connect_data *data)
 130 {
 131         struct lov_obd *lov = &obd->u.lov;
 132         struct obd_uuid *tgt_uuid;
 133         struct obd_device *tgt_obd;
 134         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 135         struct obd_import *imp;
 136 #ifdef __KERNEL__
 137         cfs_proc_dir_entry_t *lov_proc_dir;
 138 #endif
 139         int rc;
 140         ENTRY;
 141
 142         if (!lov->lov_tgts[index])
 143                 RETURN(-EINVAL);
 144
 145         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 146         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 147
 148         if (!tgt_obd->obd_set_up) {
 149                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 150                 RETURN(-EINVAL);
 151         }
 152
 153         /* override the sp_me from lov */
 154         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 155
 156         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 157                 data->ocd_index = index;
 158
 159         /*
 160          * Divine LOV knows that OBDs under it are OSCs.
 161          */
 162         imp = tgt_obd->u.cli.cl_import;
 163
 164         if (activate) {
 165                 tgt_obd->obd_no_recov = 0;
 166                 /* FIXME this is probably supposed to be
 167                    ptlrpc_set_import_active.  Horrible naming. */
 168                 ptlrpc_activate_import(imp);
 169         }
 170
 171         rc = obd_register_observer(tgt_obd, obd);
 172         if (rc) {
 173                 CERROR("Target %s register_observer error %d\n",
 174                        obd_uuid2str(tgt_uuid), rc);
 175                 RETURN(rc);
 176         }
 177
 178
 179         if (imp->imp_invalid) {
 180                 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
 181                        "disabled\n", obd_uuid2str(tgt_uuid));
 182                 RETURN(0);
 183         }
 184
 185         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 186                          &lov_osc_uuid, data, NULL);
 187         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 188                 CERROR("Target %s connect error %d\n",
 189                        obd_uuid2str(tgt_uuid), rc);
 190                 RETURN(-ENODEV);
 191         }
 192
 193         lov->lov_tgts[index]->ltd_reap = 0;
 194
 195         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 196                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 197
 198 #ifdef __KERNEL__
 199         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 200         if (lov_proc_dir) {
 201                 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
 202                 cfs_proc_dir_entry_t *osc_symlink;
 203
 204                 LASSERT(osc_obd != NULL);
 205                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
 206                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 207
 208                 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name,
 209                                                   lov_proc_dir,
 210                                                   "../../../%s/%s",
 211                                                   osc_obd->obd_type->typ_name,
 212                                                   osc_obd->obd_name);
 213                 if (osc_symlink == NULL) {
 214                         CERROR("could not register LOV target "
 215                                 "/proc/fs/lustre/%s/%s/target_obds/%s.",
 216                                 obd->obd_type->typ_name, obd->obd_name,
 217                                 osc_obd->obd_name);
 218                         lprocfs_remove(&lov_proc_dir);
 219                 }
 220         }
 221 #endif
 222
 223         rc = qos_add_tgt(obd, index);
 224         if (rc)
 225                 CERROR("qos_add_tgt failed %d\n", rc);
 226
 227         RETURN(0);
 228 }
 229
 230 static int lov_connect(const struct lu_env *env,
 231                        struct obd_export **exp, struct obd_device *obd,
 232                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 233                        void *localdata)
 234 {
 235         struct lov_obd *lov = &obd->u.lov;
 236         struct lov_tgt_desc *tgt;
 237         struct lustre_handle conn;
 238         int i, rc;
 239         ENTRY;
 240
 241         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 242
 243         rc = class_connect(&conn, obd, cluuid);
 244         if (rc)
 245                 RETURN(rc);
 246
 247         *exp = class_conn2export(&conn);
 248
 249         /* Why should there ever be more than 1 connect? */
 250         lov->lov_connects++;
 251         LASSERT(lov->lov_connects == 1);
 252
 253         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 254         if (data)
 255                 lov->lov_ocd = *data;
 256
 257         obd_getref(obd);
 258         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 259                 tgt = lov->lov_tgts[i];
 260                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 261                         continue;
 262                 /* Flags will be lowest common denominator */
 263                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 264                 if (rc) {
 265                         CERROR("%s: lov connect tgt %d failed: %d\n",
 266                                obd->obd_name, i, rc);
 267                         continue;
 268                 }
 269                 /* connect to administrative disabled ost */
 270                 if (!lov->lov_tgts[i]->ltd_exp)
 271                         continue;
 272
 273                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 274                                 OBD_NOTIFY_CONNECT, (void *)&i);
 275                 if (rc) {
 276                         CERROR("%s error sending notify %d\n",
 277                                obd->obd_name, rc);
 278                 }
 279         }
 280         obd_putref(obd);
 281
 282         RETURN(0);
 283 }
 284
 285 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 286 {
 287         cfs_proc_dir_entry_t *lov_proc_dir;
 288         struct lov_obd *lov = &obd->u.lov;
 289         struct obd_device *osc_obd;
 290         int rc;
 291         ENTRY;
 292
 293         osc_obd = class_exp2obd(tgt->ltd_exp);
 294         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 295                obd->obd_name, osc_obd->obd_name);
 296
 297         if (tgt->ltd_active) {
 298                 tgt->ltd_active = 0;
 299                 lov->desc.ld_active_tgt_count--;
 300                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 301         }
 302
 303         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 304         if (lov_proc_dir) {
 305                 cfs_proc_dir_entry_t *osc_symlink;
 306
 307                 osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name);
 308                 if (osc_symlink) {
 309                         lprocfs_remove(&osc_symlink);
 310                 } else {
 311                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing.",
 312                                obd->obd_type->typ_name, obd->obd_name,
 313                                osc_obd->obd_name);
 314                 }
 315         }
 316
 317         if (osc_obd) {
 318                 /* Pass it on to our clients.
 319                  * XXX This should be an argument to disconnect,
 320                  * XXX not a back-door flag on the OBD.  Ah well.
 321                  */
 322                 osc_obd->obd_force = obd->obd_force;
 323                 osc_obd->obd_fail = obd->obd_fail;
 324                 osc_obd->obd_no_recov = obd->obd_no_recov;
 325         }
 326
 327         obd_register_observer(osc_obd, NULL);
 328
 329         rc = obd_disconnect(tgt->ltd_exp);
 330         if (rc) {
 331                 CERROR("Target %s disconnect error %d\n",
 332                        tgt->ltd_uuid.uuid, rc);
 333                 rc = 0;
 334         }
 335
 336         qos_del_tgt(obd, tgt);
 337
 338         tgt->ltd_exp = NULL;
 339         RETURN(0);
 340 }
 341
 342 static int lov_disconnect(struct obd_export *exp)
 343 {
 344         struct obd_device *obd = class_exp2obd(exp);
 345         struct lov_obd *lov = &obd->u.lov;
 346         int i, rc;
 347         ENTRY;
 348
 349         if (!lov->lov_tgts)
 350                 goto out;
 351
 352         /* Only disconnect the underlying layers on the final disconnect. */
 353         lov->lov_connects--;
 354         if (lov->lov_connects != 0) {
 355                 /* why should there be more than 1 connect? */
 356                 CERROR("disconnect #%d\n", lov->lov_connects);
 357                 goto out;
 358         }
 359
 360         /* Let's hold another reference so lov_del_obd doesn't spin through
 361            putref every time */
 362         obd_getref(obd);
 363
 364         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 365                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 366                         /* Disconnection is the last we know about an obd */
 367                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
 368                 }
 369         }
 370         obd_putref(obd);
 371
 372 out:
 373         rc = class_disconnect(exp); /* bz 9811 */
 374         RETURN(rc);
 375 }
 376
 377 /* Error codes:
 378  *
 379  *  -EINVAL  : UUID can't be found in the LOV's target list
 380  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 381  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 382  *  any >= 0 : is log target index
 383  */
 384 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 385                               enum obd_notify_event ev)
 386 {
 387         struct lov_obd *lov = &obd->u.lov;
 388         struct lov_tgt_desc *tgt;
 389         int index, activate, active;
 390         ENTRY;
 391
 392         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 393                lov, uuid->uuid, ev);
 394
 395         obd_getref(obd);
 396         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 397                 tgt = lov->lov_tgts[index];
 398                 if (!tgt || !tgt->ltd_exp)
 399                         continue;
 400
 401                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 402                        index, obd_uuid2str(&tgt->ltd_uuid),
 403                        tgt->ltd_exp->exp_handle.h_cookie);
 404                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 405                         break;
 406         }
 407
 408         if (index == lov->desc.ld_tgt_count)
 409                 GOTO(out, index = -EINVAL);
 410
 411         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 412                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 413
 414                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 415                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 416                                uuid->uuid, activate ? "" : "de");
 417                 } else {
 418                         lov->lov_tgts[index]->ltd_activate = activate;
 419                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 420                                activate ? "" : "de", obd_uuid2str(uuid));
 421                 }
 422
 423         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 424                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 425
 426                 if (lov->lov_tgts[index]->ltd_active == active) {
 427                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 428                                uuid->uuid, active ? "" : "in");
 429                         GOTO(out, index);
 430                 } else {
 431                         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 432                                obd_uuid2str(uuid), active ? "" : "in");
 433                 }
 434
 435                 lov->lov_tgts[index]->ltd_active = active;
 436                 if (active) {
 437                         lov->desc.ld_active_tgt_count++;
 438                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 439                 } else {
 440                         lov->desc.ld_active_tgt_count--;
 441                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 442                 }
 443                 /* remove any old qos penalty */
 444                 lov->lov_tgts[index]->ltd_qos.ltq_penalty = 0;
 445         } else {
 446                 CERROR("Unknown event(%d) for uuid %s", ev, uuid->uuid);
 447         }
 448
 449  out:
 450         obd_putref(obd);
 451         RETURN(index);
 452 }
 453
 454 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 455                       enum obd_notify_event ev, void *data)
 456 {
 457         int rc = 0;
 458         ENTRY;
 459
 460         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 461             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 462                 struct obd_uuid *uuid;
 463
 464                 LASSERT(watched);
 465
 466                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 467                         CERROR("unexpected notification of %s %s!\n",
 468                                watched->obd_type->typ_name,
 469                                watched->obd_name);
 470                         RETURN(-EINVAL);
 471                 }
 472                 uuid = &watched->u.cli.cl_target_uuid;
 473
 474                 /* Set OSC as active before notifying the observer, so the
 475                  * observer can use the OSC normally.
 476                  */
 477                 rc = lov_set_osc_active(obd, uuid, ev);
 478                 if (rc < 0) {
 479                         CERROR("event(%d) of %s failed: %d\n", ev,
 480                                obd_uuid2str(uuid), rc);
 481                         RETURN(rc);
 482                 }
 483                 /* active event should be pass lov target index as data */
 484                 data = &rc;
 485         }
 486
 487         /* Pass the notification up the chain. */
 488         if (watched) {
 489                 rc = obd_notify_observer(obd, watched, ev, data);
 490         } else {
 491                 /* NULL watched means all osc's in the lov (only for syncs) */
 492                 /* sync event should be send lov idx as data */
 493                 struct lov_obd *lov = &obd->u.lov;
 494                 int i, is_sync;
 495
 496                 data = &i;
 497                 is_sync = (ev == OBD_NOTIFY_SYNC) ||
 498                           (ev == OBD_NOTIFY_SYNC_NONBLOCK);
 499
 500                 obd_getref(obd);
 501                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 502                         if (!lov->lov_tgts[i])
 503                                 continue;
 504
 505                         /* don't send sync event if target not
 506                          * connected/activated */
 507                         if (is_sync &&  !lov->lov_tgts[i]->ltd_active)
 508                                 continue;
 509
 510                         rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
 511                                                  ev, data);
 512                         if (rc) {
 513                                 CERROR("%s: notify %s of %s failed %d\n",
 514                                        obd->obd_name,
 515                                        obd->obd_observer->obd_name,
 516                                        lov->lov_tgts[i]->ltd_obd->obd_name,
 517                                        rc);
 518                         }
 519                 }
 520                 obd_putref(obd);
 521         }
 522
 523         RETURN(rc);
 524 }
 525
 526 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 527                           __u32 index, int gen, int active)
 528 {
 529         struct lov_obd *lov = &obd->u.lov;
 530         struct lov_tgt_desc *tgt;
 531         struct obd_device *tgt_obd;
 532         int rc;
 533         ENTRY;
 534
 535         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 536                uuidp->uuid, index, gen, active);
 537
 538         if (gen <= 0) {
 539                 CERROR("request to add OBD %s with invalid generation: %d\n",
 540                        uuidp->uuid, gen);
 541                 RETURN(-EINVAL);
 542         }
 543
 544         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 545                                         &obd->obd_uuid);
 546         if (tgt_obd == NULL)
 547                 RETURN(-EINVAL);
 548
 549         cfs_mutex_lock(&lov->lov_lock);
 550
 551         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 552                 tgt = lov->lov_tgts[index];
 553                 CERROR("UUID %s already assigned at LOV target index %d\n",
 554                        obd_uuid2str(&tgt->ltd_uuid), index);
 555                 cfs_mutex_unlock(&lov->lov_lock);
 556                 RETURN(-EEXIST);
 557         }
 558
 559         if (index >= lov->lov_tgt_size) {
 560                 /* We need to reallocate the lov target array. */
 561                 struct lov_tgt_desc **newtgts, **old = NULL;
 562                 __u32 newsize, oldsize = 0;
 563
 564                 newsize = max(lov->lov_tgt_size, (__u32)2);
 565                 while (newsize < index + 1)
 566                         newsize = newsize << 1;
 567                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 568                 if (newtgts == NULL) {
 569                         cfs_mutex_unlock(&lov->lov_lock);
 570                         RETURN(-ENOMEM);
 571                 }
 572
 573                 if (lov->lov_tgt_size) {
 574                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 575                                lov->lov_tgt_size);
 576                         old = lov->lov_tgts;
 577                         oldsize = lov->lov_tgt_size;
 578                 }
 579
 580                 lov->lov_tgts = newtgts;
 581                 lov->lov_tgt_size = newsize;
 582 #ifdef __KERNEL__
 583                 smp_rmb();
 584 #endif
 585                 if (old)
 586                         OBD_FREE(old, sizeof(*old) * oldsize);
 587
 588                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 589                        lov->lov_tgts, lov->lov_tgt_size);
 590         }
 591
 592         OBD_ALLOC_PTR(tgt);
 593         if (!tgt) {
 594                 cfs_mutex_unlock(&lov->lov_lock);
 595                 RETURN(-ENOMEM);
 596         }
 597
 598         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 599         if (rc) {
 600                 cfs_mutex_unlock(&lov->lov_lock);
 601                 OBD_FREE_PTR(tgt);
 602                 RETURN(rc);
 603         }
 604
 605         tgt->ltd_uuid = *uuidp;
 606         tgt->ltd_obd = tgt_obd;
 607         /* XXX - add a sanity check on the generation number. */
 608         tgt->ltd_gen = gen;
 609         tgt->ltd_index = index;
 610         tgt->ltd_activate = active;
 611         lov->lov_tgts[index] = tgt;
 612         if (index >= lov->desc.ld_tgt_count)
 613                 lov->desc.ld_tgt_count = index + 1;
 614
 615         cfs_mutex_unlock(&lov->lov_lock);
 616
 617         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 618                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 619
 620         rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
 621
 622         if (lov->lov_connects == 0) {
 623                 /* lov_connect hasn't been called yet. We'll do the
 624                    lov_connect_obd on this target when that fn first runs,
 625                    because we don't know the connect flags yet. */
 626                 RETURN(0);
 627         }
 628
 629         obd_getref(obd);
 630
 631         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 632         if (rc)
 633                 GOTO(out, rc);
 634
 635         /* connect to administrative disabled ost */
 636         if (!tgt->ltd_exp)
 637                 GOTO(out, rc = 0);
 638
 639         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 640                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
 641                         (void *)&index);
 642
 643 out:
 644         if (rc) {
 645                 CERROR("add failed (%d), deleting %s\n", rc,
 646                        obd_uuid2str(&tgt->ltd_uuid));
 647                 lov_del_target(obd, index, 0, 0);
 648         }
 649         obd_putref(obd);
 650         RETURN(rc);
 651 }
 652
 653 /* Schedule a target for deletion */
 654 int lov_del_target(struct obd_device *obd, __u32 index,
 655                    struct obd_uuid *uuidp, int gen)
 656 {
 657         struct lov_obd *lov = &obd->u.lov;
 658         int count = lov->desc.ld_tgt_count;
 659         int rc = 0;
 660         ENTRY;
 661
 662         if (index >= count) {
 663                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 664                        index, count);
 665                 RETURN(-EINVAL);
 666         }
 667
 668         obd_getref(obd);
 669
 670         if (!lov->lov_tgts[index]) {
 671                 CERROR("LOV target at index %d is not setup.\n", index);
 672                 GOTO(out, rc = -EINVAL);
 673         }
 674
 675         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 676                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 677                        lov_uuid2str(lov, index), index,
 678                        obd_uuid2str(uuidp));
 679                 GOTO(out, rc = -EINVAL);
 680         }
 681
 682         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 683                lov_uuid2str(lov, index), index,
 684                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 685                lov->lov_tgts[index]->ltd_active);
 686
 687         lov->lov_tgts[index]->ltd_reap = 1;
 688         lov->lov_death_row++;
 689         /* we really delete it from obd_putref */
 690 out:
 691         obd_putref(obd);
 692
 693         RETURN(rc);
 694 }
 695
 696 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 697 {
 698         struct obd_device *osc_obd;
 699
 700         LASSERT(tgt);
 701         LASSERT(tgt->ltd_reap);
 702
 703         osc_obd = class_exp2obd(tgt->ltd_exp);
 704
 705         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 706                tgt->ltd_uuid.uuid,
 707                osc_obd ? osc_obd->obd_name : "<no obd>");
 708
 709         if (tgt->ltd_exp)
 710                 lov_disconnect_obd(obd, tgt);
 711
 712         OBD_FREE_PTR(tgt);
 713
 714         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 715            do it ourselves. And we can't do it from lov_cleanup,
 716            because we just lost our only reference to it. */
 717         if (osc_obd)
 718                 class_manual_cleanup(osc_obd);
 719 }
 720
 721 void lov_fix_desc_stripe_size(__u64 *val)
 722 {
 723         if (*val < PTLRPC_MAX_BRW_SIZE) {
 724                 LCONSOLE_WARN("Increasing default stripe size to min %u\n",
 725                               PTLRPC_MAX_BRW_SIZE);
 726                 *val = PTLRPC_MAX_BRW_SIZE;
 727         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 728                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 729                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 730                               "multiple of %u)\n",
 731                               *val, LOV_MIN_STRIPE_SIZE);
 732         }
 733 }
 734
 735 void lov_fix_desc_stripe_count(__u32 *val)
 736 {
 737         if (*val == 0)
 738                 *val = 1;
 739 }
 740
 741 void lov_fix_desc_pattern(__u32 *val)
 742 {
 743         /* from lov_setstripe */
 744         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 745                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 746                 *val = 0;
 747         }
 748 }
 749
 750 void lov_fix_desc_qos_maxage(__u32 *val)
 751 {
 752         /* fix qos_maxage */
 753         if (*val == 0)
 754                 *val = QOS_DEFAULT_MAXAGE;
 755 }
 756
 757 void lov_fix_desc(struct lov_desc *desc)
 758 {
 759         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 760         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 761         lov_fix_desc_pattern(&desc->ld_pattern);
 762         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 763 }
 764
 765 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 766 {
 767         struct lprocfs_static_vars lvars = { 0 };
 768         struct lov_desc *desc;
 769         struct lov_obd *lov = &obd->u.lov;
 770         int rc;
 771         ENTRY;
 772
 773         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 774                 CERROR("LOV setup requires a descriptor\n");
 775                 RETURN(-EINVAL);
 776         }
 777
 778         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 779
 780         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 781                 CERROR("descriptor size wrong: %d > %d\n",
 782                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 783                 RETURN(-EINVAL);
 784         }
 785
 786         if (desc->ld_magic != LOV_DESC_MAGIC) {
 787                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 788                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 789                                    obd->obd_name, desc);
 790                             lustre_swab_lov_desc(desc);
 791                 } else {
 792                         CERROR("%s: Bad lov desc magic: %#x\n",
 793                                obd->obd_name, desc->ld_magic);
 794                         RETURN(-EINVAL);
 795                 }
 796         }
 797
 798         lov_fix_desc(desc);
 799
 800         desc->ld_active_tgt_count = 0;
 801         lov->desc = *desc;
 802         lov->lov_tgt_size = 0;
 803
 804         cfs_mutex_init(&lov->lov_lock);
 805         cfs_atomic_set(&lov->lov_refcount, 0);
 806         CFS_INIT_LIST_HEAD(&lov->lov_qos.lq_oss_list);
 807         cfs_init_rwsem(&lov->lov_qos.lq_rw_sem);
 808         lov->lov_sp_me = LUSTRE_SP_CLI;
 809         lov->lov_qos.lq_dirty = 1;
 810         lov->lov_qos.lq_rr.lqr_dirty = 1;
 811         lov->lov_qos.lq_reset = 1;
 812         /* Default priority is toward free space balance */
 813         lov->lov_qos.lq_prio_free = 232;
 814         /* Default threshold for rr (roughly 17%) */
 815         lov->lov_qos.lq_threshold_rr = 43;
 816         /* Init statfs fields */
 817         OBD_ALLOC_PTR(lov->lov_qos.lq_statfs_data);
 818         if (NULL == lov->lov_qos.lq_statfs_data)
 819                 RETURN(-ENOMEM);
 820         cfs_waitq_init(&lov->lov_qos.lq_statfs_waitq);
 821
 822         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 823                                                    HASH_POOLS_MAX_BITS,
 824                                                    HASH_POOLS_BKT_BITS, 0,
 825                                                    CFS_HASH_MIN_THETA,
 826                                                    CFS_HASH_MAX_THETA,
 827                                                    &pool_hash_operations,
 828                                                    CFS_HASH_DEFAULT);
 829         CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
 830         lov->lov_pool_count = 0;
 831         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 832         if (rc)
 833                 GOTO(out_free_statfs, rc);
 834         rc = lov_ost_pool_init(&lov->lov_qos.lq_rr.lqr_pool, 0);
 835         if (rc)
 836                 GOTO(out_free_lov_packed, rc);
 837
 838         lprocfs_lov_init_vars(&lvars);
 839         lprocfs_obd_setup(obd, lvars.obd_vars);
 840 #ifdef LPROCFS
 841         {
 842                 int rc;
 843
 844                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
 845                                         0444, &lov_proc_target_fops, obd);
 846                 if (rc)
 847                         CWARN("Error adding the target_obd file\n");
 848         }
 849 #endif
 850         lov->lov_pool_proc_entry = lprocfs_register("pools",
 851                                                     obd->obd_proc_entry,
 852                                                     NULL, NULL);
 853
 854         RETURN(0);
 855
 856 out_free_lov_packed:
 857         lov_ost_pool_free(&lov->lov_packed);
 858 out_free_statfs:
 859         OBD_FREE_PTR(lov->lov_qos.lq_statfs_data);
 860         return rc;
 861 }
 862
 863 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 864 {
 865         int rc = 0;
 866         struct lov_obd *lov = &obd->u.lov;
 867
 868         ENTRY;
 869
 870         switch (stage) {
 871         case OBD_CLEANUP_EARLY: {
 872                 int i;
 873                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 874                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 875                                 continue;
 876                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 877                                        OBD_CLEANUP_EARLY);
 878                 }
 879                 break;
 880         }
 881         case OBD_CLEANUP_EXPORTS:
 882                 rc = obd_llog_finish(obd, 0);
 883                 if (rc != 0)
 884                         CERROR("failed to cleanup llogging subsystems\n");
 885                 break;
 886         }
 887         RETURN(rc);
 888 }
 889
 890 static int lov_cleanup(struct obd_device *obd)
 891 {
 892         struct lov_obd *lov = &obd->u.lov;
 893         cfs_list_t *pos, *tmp;
 894         struct pool_desc *pool;
 895         ENTRY;
 896
 897         cfs_list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 898                 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
 899                 /* free pool structs */
 900                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 901                 lov_pool_del(obd, pool->pool_name);
 902         }
 903         cfs_hash_putref(lov->lov_pools_hash_body);
 904         lov_ost_pool_free(&(lov->lov_qos.lq_rr.lqr_pool));
 905         lov_ost_pool_free(&lov->lov_packed);
 906
 907         lprocfs_obd_cleanup(obd);
 908         if (lov->lov_tgts) {
 909                 int i;
 910                 obd_getref(obd);
 911                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 912                         if (!lov->lov_tgts[i])
 913                                 continue;
 914
 915                         /* Inactive targets may never have connected */
 916                         if (lov->lov_tgts[i]->ltd_active ||
 917                             cfs_atomic_read(&lov->lov_refcount))
 918                             /* We should never get here - these
 919                                should have been removed in the
 920                              disconnect. */
 921                                 CERROR("lov tgt %d not cleaned!"
 922                                        " deathrow=%d, lovrc=%d\n",
 923                                        i, lov->lov_death_row,
 924                                        cfs_atomic_read(&lov->lov_refcount));
 925                         lov_del_target(obd, i, 0, 0);
 926                 }
 927                 obd_putref(obd);
 928                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 929                          lov->lov_tgt_size);
 930                 lov->lov_tgt_size = 0;
 931         }
 932         OBD_FREE_PTR(lov->lov_qos.lq_statfs_data);
 933         RETURN(0);
 934 }
 935
 936 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 937                             __u32 *indexp, int *genp)
 938 {
 939         struct obd_uuid obd_uuid;
 940         int cmd;
 941         int rc = 0;
 942         ENTRY;
 943
 944         switch(cmd = lcfg->lcfg_command) {
 945         case LCFG_LOV_ADD_OBD:
 946         case LCFG_LOV_ADD_INA:
 947         case LCFG_LOV_DEL_OBD: {
 948                 __u32 index;
 949                 int gen;
 950                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 951                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 952                         GOTO(out, rc = -EINVAL);
 953
 954                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 955
 956                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
 957                         GOTO(out, rc = -EINVAL);
 958                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
 959                         GOTO(out, rc = -EINVAL);
 960                 index = *indexp;
 961                 gen = *genp;
 962                 if (cmd == LCFG_LOV_ADD_OBD)
 963                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 964                 else if (cmd == LCFG_LOV_ADD_INA)
 965                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 966                 else
 967                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 968                 GOTO(out, rc);
 969         }
 970         case LCFG_PARAM: {
 971                 struct lprocfs_static_vars lvars = { 0 };
 972                 struct lov_desc *desc = &(obd->u.lov.desc);
 973
 974                 if (!desc)
 975                         GOTO(out, rc = -EINVAL);
 976
 977                 lprocfs_lov_init_vars(&lvars);
 978
 979                 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
 980                                               lcfg, obd);
 981                 if (rc > 0)
 982                         rc = 0;
 983                 GOTO(out, rc);
 984         }
 985         case LCFG_POOL_NEW:
 986         case LCFG_POOL_ADD:
 987         case LCFG_POOL_DEL:
 988         case LCFG_POOL_REM:
 989                 GOTO(out, rc);
 990
 991         default: {
 992                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 993                 GOTO(out, rc = -EINVAL);
 994
 995         }
 996         }
 997 out:
 998         RETURN(rc);
 999 }
1000
1001 #ifndef log2
1002 #define log2(n) cfs_ffz(~(n))
1003 #endif
1004
1005 static int lov_clear_orphans(struct obd_export *export, struct obdo *src_oa,
1006                              struct lov_stripe_md **ea,
1007                              struct obd_trans_info *oti)
1008 {
1009         struct lov_obd *lov;
1010         struct obdo *tmp_oa;
1011         struct obd_uuid *ost_uuid = NULL;
1012         int rc = 0, i;
1013         ENTRY;
1014
1015         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1016                 src_oa->o_flags == OBD_FL_DELORPHAN);
1017
1018         lov = &export->exp_obd->u.lov;
1019
1020         OBDO_ALLOC(tmp_oa);
1021         if (tmp_oa == NULL)
1022                 RETURN(-ENOMEM);
1023
1024         if (oti->oti_ost_uuid) {
1025                 ost_uuid = oti->oti_ost_uuid;
1026                 CDEBUG(D_HA, "clearing orphans only for %s\n",
1027                        ost_uuid->uuid);
1028         }
1029
1030         obd_getref(export->exp_obd);
1031         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1032                 struct lov_stripe_md obj_md;
1033                 struct lov_stripe_md *obj_mdp = &obj_md;
1034                 struct lov_tgt_desc *tgt;
1035                 int err;
1036
1037                 tgt = lov->lov_tgts[i];
1038                 if (!tgt)
1039                         continue;
1040
1041                 /* if called for a specific target, we don't
1042                    care if it is not active. */
1043                 if (!lov->lov_tgts[i]->ltd_active && ost_uuid == NULL) {
1044                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
1045                         continue;
1046                 }
1047
1048                 if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->ltd_uuid))
1049                         continue;
1050
1051                 CDEBUG(D_CONFIG,"Clear orphans for %d:%s\n", i,
1052                        obd_uuid2str(ost_uuid));
1053
1054                 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1055
1056                 LASSERT(lov->lov_tgts[i]->ltd_exp);
1057                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1058                 err = obd_create(NULL, lov->lov_tgts[i]->ltd_exp,
1059                                  tmp_oa, &obj_mdp, oti);
1060                 if (err) {
1061                         /* This export will be disabled until it is recovered,
1062                            and then orphan recovery will be completed. */
1063                         CERROR("error in orphan recovery on OST idx %d/%d: "
1064                                "rc = %d\n", i, lov->desc.ld_tgt_count, err);
1065                         rc = err;
1066                 }
1067
1068                 if (ost_uuid)
1069                         break;
1070         }
1071         obd_putref(export->exp_obd);
1072
1073         OBDO_FREE(tmp_oa);
1074         RETURN(rc);
1075 }
1076
1077 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
1078                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
1079 {
1080         struct lov_stripe_md *obj_mdp, *lsm;
1081         struct lov_obd *lov = &exp->exp_obd->u.lov;
1082         unsigned ost_idx;
1083         int rc, i;
1084         ENTRY;
1085
1086         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1087                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1088
1089         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1090         if (obj_mdp == NULL)
1091                 RETURN(-ENOMEM);
1092
1093         ost_idx = src_oa->o_nlink;
1094         lsm = *ea;
1095         if (lsm == NULL)
1096                 GOTO(out, rc = -EINVAL);
1097         if (ost_idx >= lov->desc.ld_tgt_count ||
1098             !lov->lov_tgts[ost_idx])
1099                 GOTO(out, rc = -EINVAL);
1100
1101         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1102                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1103                         if (lsm->lsm_oinfo[i]->loi_id != src_oa->o_id)
1104                                 GOTO(out, rc = -EINVAL);
1105                         break;
1106                 }
1107         }
1108         if (i == lsm->lsm_stripe_count)
1109                 GOTO(out, rc = -EINVAL);
1110
1111         rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp,
1112                         src_oa, &obj_mdp, oti);
1113 out:
1114         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1115         RETURN(rc);
1116 }
1117
1118 /* the LOV expects oa->o_id to be set to the LOV object id */
1119 static int lov_create(const struct lu_env *env, struct obd_export *exp,
1120                       struct obdo *src_oa, struct lov_stripe_md **ea,
1121                       struct obd_trans_info *oti)
1122 {
1123         struct lov_obd *lov;
1124         struct obd_info oinfo;
1125         struct lov_request_set *set = NULL;
1126         struct lov_request *req;
1127         struct l_wait_info  lwi = { 0 };
1128         int rc = 0;
1129         ENTRY;
1130
1131         LASSERT(ea != NULL);
1132         if (exp == NULL)
1133                 RETURN(-EINVAL);
1134
1135         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1136             src_oa->o_flags == OBD_FL_DELORPHAN) {
1137                 rc = lov_clear_orphans(exp, src_oa, ea, oti);
1138                 RETURN(rc);
1139         }
1140
1141         lov = &exp->exp_obd->u.lov;
1142         if (!lov->desc.ld_active_tgt_count)
1143                 RETURN(-EIO);
1144
1145         obd_getref(exp->exp_obd);
1146         /* Recreate a specific object id at the given OST index */
1147         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1148             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1149                  rc = lov_recreate(exp, src_oa, ea, oti);
1150                  GOTO(out, rc);
1151         }
1152
1153         /* issue statfs rpcs if the osfs data is older than qos_maxage - 1s,
1154          * later in alloc_qos(), we will wait for those rpcs to complete if
1155          * the osfs age is older than 2 * qos_maxage */
1156         qos_statfs_update(exp->exp_obd,
1157                           cfs_time_shift_64(-lov->desc.ld_qos_maxage +
1158                                             OBD_STATFS_CACHE_SECONDS),
1159                           0);
1160
1161         rc = lov_prep_create_set(exp, &oinfo, ea, src_oa, oti, &set);
1162         if (rc)
1163                 GOTO(out, rc);
1164
1165         cfs_list_for_each_entry(req, &set->set_list, rq_link) {
1166                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1167                 rc = obd_create_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1168                                       &req->rq_oi, &req->rq_oi.oi_md, oti);
1169         }
1170
1171         /* osc_create have timeout equ obd_timeout/2 so waiting don't be
1172          * longer then this */
1173         l_wait_event(set->set_waitq, lov_set_finished(set, 1), &lwi);
1174
1175         /* we not have ptlrpc set for assign set->interpret and should
1176          * be call interpret function himself. calling from cb_create_update
1177          * not permited because lov_fini_create_set can sleep for long time,
1178          * but we must avoid sleeping in ptlrpcd interpret function. */
1179         rc = lov_fini_create_set(set, ea);
1180 out:
1181         obd_putref(exp->exp_obd);
1182         RETURN(rc);
1183 }
1184
1185 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1186 do {                                                                            \
1187         LASSERT((lsmp) != NULL);                                                \
1188         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                          \
1189                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                            \
1190                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);              \
1191 } while (0)
1192
1193 static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
1194                        struct obdo *oa, struct lov_stripe_md *lsm,
1195                        struct obd_trans_info *oti, struct obd_export *md_exp,
1196                        void *capa)
1197 {
1198         struct lov_request_set *set;
1199         struct obd_info oinfo;
1200         struct lov_request *req;
1201         cfs_list_t *pos;
1202         struct lov_obd *lov;
1203         int rc = 0, err = 0;
1204         ENTRY;
1205
1206         ASSERT_LSM_MAGIC(lsm);
1207
1208         if (!exp || !exp->exp_obd)
1209                 RETURN(-ENODEV);
1210
1211         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1212                 LASSERT(oti);
1213                 LASSERT(oti->oti_logcookies);
1214         }
1215
1216         lov = &exp->exp_obd->u.lov;
1217         obd_getref(exp->exp_obd);
1218         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1219         if (rc)
1220                 GOTO(out, rc);
1221
1222         cfs_list_for_each (pos, &set->set_list) {
1223                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1224
1225                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1226                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1227
1228                 err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1229                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1230                 err = lov_update_common_set(set, req, err);
1231                 if (err) {
1232                         CERROR("error: destroying objid "LPX64" subobj "
1233                                LPX64" on OST idx %d: rc = %d\n",
1234                                oa->o_id, req->rq_oi.oi_oa->o_id,
1235                                req->rq_idx, err);
1236                         if (!rc)
1237                                 rc = err;
1238                 }
1239         }
1240
1241         if (rc == 0) {
1242                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1243                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1244         }
1245         err = lov_fini_destroy_set(set);
1246 out:
1247         obd_putref(exp->exp_obd);
1248         RETURN(rc ? rc : err);
1249 }
1250
1251 static int lov_getattr(const struct lu_env *env, struct obd_export *exp,
1252                        struct obd_info *oinfo)
1253 {
1254         struct lov_request_set *set;
1255         struct lov_request *req;
1256         cfs_list_t *pos;
1257         struct lov_obd *lov;
1258         int err = 0, rc = 0;
1259         ENTRY;
1260
1261         LASSERT(oinfo);
1262         ASSERT_LSM_MAGIC(oinfo->oi_md);
1263
1264         if (!exp || !exp->exp_obd)
1265                 RETURN(-ENODEV);
1266
1267         lov = &exp->exp_obd->u.lov;
1268
1269         rc = lov_prep_getattr_set(exp, oinfo, &set);
1270         if (rc)
1271                 RETURN(rc);
1272
1273         cfs_list_for_each (pos, &set->set_list) {
1274                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1275
1276                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1277                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1278                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1279
1280                 rc = obd_getattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1281                                  &req->rq_oi);
1282                 err = lov_update_common_set(set, req, rc);
1283                 if (err) {
1284                         CERROR("error: getattr objid "LPX64" subobj "
1285                                LPX64" on OST idx %d: rc = %d\n",
1286                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1287                                req->rq_idx, err);
1288                         break;
1289                 }
1290         }
1291
1292         rc = lov_fini_getattr_set(set);
1293         if (err)
1294                 rc = err;
1295         RETURN(rc);
1296 }
1297
1298 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1299                                  void *data, int rc)
1300 {
1301         struct lov_request_set *lovset = (struct lov_request_set *)data;
1302         int err;
1303         ENTRY;
1304
1305         /* don't do attribute merge if this aysnc op failed */
1306         if (rc)
1307                 cfs_atomic_set(&lovset->set_completes, 0);
1308         err = lov_fini_getattr_set(lovset);
1309         RETURN(rc ? rc : err);
1310 }
1311
1312 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1313                               struct ptlrpc_request_set *rqset)
1314 {
1315         struct lov_request_set *lovset;
1316         struct lov_obd *lov;
1317         cfs_list_t *pos;
1318         struct lov_request *req;
1319         int rc = 0, err;
1320         ENTRY;
1321
1322         LASSERT(oinfo);
1323         ASSERT_LSM_MAGIC(oinfo->oi_md);
1324
1325         if (!exp || !exp->exp_obd)
1326                 RETURN(-ENODEV);
1327
1328         lov = &exp->exp_obd->u.lov;
1329
1330         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1331         if (rc)
1332                 RETURN(rc);
1333
1334         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1335                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1336                oinfo->oi_md->lsm_stripe_size);
1337
1338         cfs_list_for_each (pos, &lovset->set_list) {
1339                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1340
1341                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1342                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1343                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1344                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1345                                        &req->rq_oi, rqset);
1346                 if (rc) {
1347                         CERROR("error: getattr objid "LPX64" subobj "
1348                                LPX64" on OST idx %d: rc = %d\n",
1349                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1350                                req->rq_idx, rc);
1351                         GOTO(out, rc);
1352                 }
1353         }
1354
1355         if (!cfs_list_empty(&rqset->set_requests)) {
1356                 LASSERT(rc == 0);
1357                 LASSERT (rqset->set_interpret == NULL);
1358                 rqset->set_interpret = lov_getattr_interpret;
1359                 rqset->set_arg = (void *)lovset;
1360                 RETURN(rc);
1361         }
1362 out:
1363         if (rc)
1364                 cfs_atomic_set(&lovset->set_completes, 0);
1365         err = lov_fini_getattr_set(lovset);
1366         RETURN(rc ? rc : err);
1367 }
1368
1369 static int lov_setattr(const struct lu_env *env, struct obd_export *exp,
1370                        struct obd_info *oinfo, struct obd_trans_info *oti)
1371 {
1372         struct lov_request_set *set;
1373         struct lov_obd *lov;
1374         cfs_list_t *pos;
1375         struct lov_request *req;
1376         int err = 0, rc = 0;
1377         ENTRY;
1378
1379         LASSERT(oinfo);
1380         ASSERT_LSM_MAGIC(oinfo->oi_md);
1381
1382         if (!exp || !exp->exp_obd)
1383                 RETURN(-ENODEV);
1384
1385         /* for now, we only expect the following updates here */
1386         LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1387                                             OBD_MD_FLMODE | OBD_MD_FLATIME |
1388                                             OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1389                                             OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1390                                             OBD_MD_FLGROUP | OBD_MD_FLUID |
1391                                             OBD_MD_FLGID | OBD_MD_FLFID |
1392                                             OBD_MD_FLGENER)));
1393         lov = &exp->exp_obd->u.lov;
1394         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1395         if (rc)
1396                 RETURN(rc);
1397
1398         cfs_list_for_each (pos, &set->set_list) {
1399                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1400
1401                 rc = obd_setattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1402                                  &req->rq_oi, NULL);
1403                 err = lov_update_setattr_set(set, req, rc);
1404                 if (err) {
1405                         CERROR("error: setattr objid "LPX64" subobj "
1406                                LPX64" on OST idx %d: rc = %d\n",
1407                                set->set_oi->oi_oa->o_id,
1408                                req->rq_oi.oi_oa->o_id, req->rq_idx, err);
1409                         if (!rc)
1410                                 rc = err;
1411                 }
1412         }
1413         err = lov_fini_setattr_set(set);
1414         if (!rc)
1415                 rc = err;
1416         RETURN(rc);
1417 }
1418
1419 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1420                                  void *data, int rc)
1421 {
1422         struct lov_request_set *lovset = (struct lov_request_set *)data;
1423         int err;
1424         ENTRY;
1425
1426         if (rc)
1427                 cfs_atomic_set(&lovset->set_completes, 0);
1428         err = lov_fini_setattr_set(lovset);
1429         RETURN(rc ? rc : err);
1430 }
1431
1432 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1433    needed. Otherwise, a client is waiting for responses. */
1434 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1435                              struct obd_trans_info *oti,
1436                              struct ptlrpc_request_set *rqset)
1437 {
1438         struct lov_request_set *set;
1439         struct lov_request *req;
1440         cfs_list_t *pos;
1441         struct lov_obd *lov;
1442         int rc = 0;
1443         ENTRY;
1444
1445         LASSERT(oinfo);
1446         ASSERT_LSM_MAGIC(oinfo->oi_md);
1447         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1448                 LASSERT(oti);
1449                 LASSERT(oti->oti_logcookies);
1450         }
1451
1452         if (!exp || !exp->exp_obd)
1453                 RETURN(-ENODEV);
1454
1455         lov = &exp->exp_obd->u.lov;
1456         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1457         if (rc)
1458                 RETURN(rc);
1459
1460         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1461                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1462                oinfo->oi_md->lsm_stripe_size);
1463
1464         cfs_list_for_each (pos, &set->set_list) {
1465                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1466
1467                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1468                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1469
1470                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1471                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1472                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1473
1474                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1475                                        &req->rq_oi, oti, rqset);
1476                 if (rc) {
1477                         CERROR("error: setattr objid "LPX64" subobj "
1478                                LPX64" on OST idx %d: rc = %d\n",
1479                                set->set_oi->oi_oa->o_id,
1480                                req->rq_oi.oi_oa->o_id,
1481                                req->rq_idx, rc);
1482                         break;
1483                 }
1484         }
1485
1486         /* If we are not waiting for responses on async requests, return. */
1487         if (rc || !rqset || cfs_list_empty(&rqset->set_requests)) {
1488                 int err;
1489                 if (rc)
1490                         cfs_atomic_set(&set->set_completes, 0);
1491                 err = lov_fini_setattr_set(set);
1492                 RETURN(rc ? rc : err);
1493         }
1494
1495         LASSERT(rqset->set_interpret == NULL);
1496         rqset->set_interpret = lov_setattr_interpret;
1497         rqset->set_arg = (void *)set;
1498
1499         RETURN(0);
1500 }
1501
1502 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1503                                void *data, int rc)
1504 {
1505         struct lov_request_set *lovset = (struct lov_request_set *)data;
1506         int err;
1507         ENTRY;
1508
1509         if (rc)
1510                 cfs_atomic_set(&lovset->set_completes, 0);
1511         err = lov_fini_punch_set(lovset);
1512         RETURN(rc ? rc : err);
1513 }
1514
1515 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1516  * we can send this 'punch' to just the authoritative node and the nodes
1517  * that the punch will affect. */
1518 static int lov_punch(const struct lu_env *env, struct obd_export *exp,
1519                      struct obd_info *oinfo, struct obd_trans_info *oti,
1520                      struct ptlrpc_request_set *rqset)
1521 {
1522         struct lov_request_set *set;
1523         struct lov_obd *lov;
1524         cfs_list_t *pos;
1525         struct lov_request *req;
1526         int rc = 0;
1527         ENTRY;
1528
1529         LASSERT(oinfo);
1530         ASSERT_LSM_MAGIC(oinfo->oi_md);
1531
1532         if (!exp || !exp->exp_obd)
1533                 RETURN(-ENODEV);
1534
1535         lov = &exp->exp_obd->u.lov;
1536         rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1537         if (rc)
1538                 RETURN(rc);
1539
1540         cfs_list_for_each (pos, &set->set_list) {
1541                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1542
1543                 rc = obd_punch(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1544                                &req->rq_oi, NULL, rqset);
1545                 if (rc) {
1546                         CERROR("error: punch objid "LPX64" subobj "LPX64
1547                                " on OST idx %d: rc = %d\n",
1548                                set->set_oi->oi_oa->o_id,
1549                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1550                         break;
1551                 }
1552         }
1553
1554         if (rc || cfs_list_empty(&rqset->set_requests)) {
1555                 int err;
1556                 err = lov_fini_punch_set(set);
1557                 RETURN(rc ? rc : err);
1558         }
1559
1560         LASSERT(rqset->set_interpret == NULL);
1561         rqset->set_interpret = lov_punch_interpret;
1562         rqset->set_arg = (void *)set;
1563
1564         RETURN(0);
1565 }
1566
1567 static int lov_sync_interpret(struct ptlrpc_request_set *rqset,
1568                               void *data, int rc)
1569 {
1570         struct lov_request_set *lovset = data;
1571         int err;
1572         ENTRY;
1573
1574         if (rc)
1575                 cfs_atomic_set(&lovset->set_completes, 0);
1576         err = lov_fini_sync_set(lovset);
1577         RETURN(rc ?: err);
1578 }
1579
1580 static int lov_sync(const struct lu_env *env, struct obd_export *exp,
1581                     struct obd_info *oinfo, obd_off start, obd_off end,
1582                     struct ptlrpc_request_set *rqset)
1583 {
1584         struct lov_request_set *set = NULL;
1585         struct lov_obd *lov;
1586         cfs_list_t *pos;
1587         struct lov_request *req;
1588         int rc = 0;
1589         ENTRY;
1590
1591         ASSERT_LSM_MAGIC(oinfo->oi_md);
1592         LASSERT(rqset != NULL);
1593
1594         if (!exp->exp_obd)
1595                 RETURN(-ENODEV);
1596
1597         lov = &exp->exp_obd->u.lov;
1598         rc = lov_prep_sync_set(exp, oinfo, start, end, &set);
1599         if (rc)
1600                 RETURN(rc);
1601
1602         CDEBUG(D_INFO, "fsync objid "LPX64" ["LPX64", "LPX64"]\n",
1603                set->set_oi->oi_oa->o_id, start, end);
1604
1605         cfs_list_for_each (pos, &set->set_list) {
1606                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1607
1608                 rc = obd_sync(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1609                               &req->rq_oi, req->rq_oi.oi_policy.l_extent.start,
1610                               req->rq_oi.oi_policy.l_extent.end, rqset);
1611                 if (rc) {
1612                         CERROR("error: fsync objid "LPX64" subobj "LPX64
1613                                " on OST idx %d: rc = %d\n",
1614                                set->set_oi->oi_oa->o_id,
1615                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1616                         break;
1617                 }
1618         }
1619
1620         /* If we are not waiting for responses on async requests, return. */
1621         if (rc || cfs_list_empty(&rqset->set_requests)) {
1622                 int err = lov_fini_sync_set(set);
1623
1624                 RETURN(rc ?: err);
1625         }
1626
1627         LASSERT(rqset->set_interpret == NULL);
1628         rqset->set_interpret = lov_sync_interpret;
1629         rqset->set_arg = (void *)set;
1630
1631         RETURN(0);
1632 }
1633
1634 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1635                          obd_count oa_bufs, struct brw_page *pga)
1636 {
1637         struct obd_info oinfo = { { { 0 } } };
1638         int i, rc = 0;
1639
1640         oinfo.oi_oa = lov_oinfo->oi_oa;
1641
1642         /* The caller just wants to know if there's a chance that this
1643          * I/O can succeed */
1644         for (i = 0; i < oa_bufs; i++) {
1645                 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1646                 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1647                 obd_off start, end;
1648
1649                 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1650                                            pga[i].off + pga[i].count - 1,
1651                                            &start, &end))
1652                         continue;
1653
1654                 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1655                         CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1656                         return -EIO;
1657                 }
1658
1659                 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1660                              1, &pga[i], NULL);
1661                 if (rc)
1662                         break;
1663         }
1664         return rc;
1665 }
1666
1667 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1668                    obd_count oa_bufs, struct brw_page *pga,
1669                    struct obd_trans_info *oti)
1670 {
1671         struct lov_request_set *set;
1672         struct lov_request *req;
1673         cfs_list_t *pos;
1674         struct lov_obd *lov = &exp->exp_obd->u.lov;
1675         int err, rc = 0;
1676         ENTRY;
1677
1678         ASSERT_LSM_MAGIC(oinfo->oi_md);
1679
1680         if (cmd == OBD_BRW_CHECK) {
1681                 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1682                 RETURN(rc);
1683         }
1684
1685         rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1686         if (rc)
1687                 RETURN(rc);
1688
1689         cfs_list_for_each (pos, &set->set_list) {
1690                 struct obd_export *sub_exp;
1691                 struct brw_page *sub_pga;
1692                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1693
1694                 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1695                 sub_pga = set->set_pga + req->rq_pgaidx;
1696                 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1697                              sub_pga, oti);
1698                 if (rc)
1699                         break;
1700                 lov_update_common_set(set, req, rc);
1701         }
1702
1703         err = lov_fini_brw_set(set);
1704         if (!rc)
1705                 rc = err;
1706         RETURN(rc);
1707 }
1708
1709 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
1710                                  void *data, int rc)
1711 {
1712         struct lov_request_set *lovset = (struct lov_request_set *)data;
1713         ENTRY;
1714         rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
1715         RETURN(rc);
1716 }
1717
1718 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
1719                        struct ldlm_enqueue_info *einfo,
1720                        struct ptlrpc_request_set *rqset)
1721 {
1722         ldlm_mode_t mode = einfo->ei_mode;
1723         struct lov_request_set *set;
1724         struct lov_request *req;
1725         cfs_list_t *pos;
1726         struct lov_obd *lov;
1727         ldlm_error_t rc;
1728         ENTRY;
1729
1730         LASSERT(oinfo);
1731         ASSERT_LSM_MAGIC(oinfo->oi_md);
1732         LASSERT(mode == (mode & -mode));
1733
1734         /* we should never be asked to replay a lock this way. */
1735         LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
1736
1737         if (!exp || !exp->exp_obd)
1738                 RETURN(-ENODEV);
1739
1740         lov = &exp->exp_obd->u.lov;
1741         rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
1742         if (rc)
1743                 RETURN(rc);
1744
1745         cfs_list_for_each (pos, &set->set_list) {
1746                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1747
1748                 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
1749                                  &req->rq_oi, einfo, rqset);
1750                 if (rc != ELDLM_OK)
1751                         GOTO(out, rc);
1752         }
1753
1754         if (rqset && !cfs_list_empty(&rqset->set_requests)) {
1755                 LASSERT(rc == 0);
1756                 LASSERT(rqset->set_interpret == NULL);
1757                 rqset->set_interpret = lov_enqueue_interpret;
1758                 rqset->set_arg = (void *)set;
1759                 RETURN(rc);
1760         }
1761 out:
1762         rc = lov_fini_enqueue_set(set, mode, rc, rqset);
1763         RETURN(rc);
1764 }
1765
1766 static int lov_change_cbdata(struct obd_export *exp,
1767                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1768                              void *data)
1769 {
1770         struct lov_obd *lov;
1771         int rc = 0, i;
1772         ENTRY;
1773
1774         ASSERT_LSM_MAGIC(lsm);
1775
1776         if (!exp || !exp->exp_obd)
1777                 RETURN(-ENODEV);
1778
1779         lov = &exp->exp_obd->u.lov;
1780         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1781                 struct lov_stripe_md submd;
1782                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1783
1784                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1785                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1786                         continue;
1787                 }
1788
1789                 LASSERT_SEQ_IS_MDT(loi->loi_seq);
1790                 submd.lsm_object_id = loi->loi_id;
1791                 submd.lsm_object_seq = loi->loi_seq;
1792                 submd.lsm_stripe_count = 0;
1793                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1794                                        &submd, it, data);
1795         }
1796         RETURN(rc);
1797 }
1798
1799 /* find any ldlm lock of the inode in lov
1800  * return 0    not find
1801  *        1    find one
1802  *      < 0    error */
1803 static int lov_find_cbdata(struct obd_export *exp,
1804                            struct lov_stripe_md *lsm, ldlm_iterator_t it,
1805                            void *data)
1806 {
1807         struct lov_obd *lov;
1808         int rc = 0, i;
1809         ENTRY;
1810
1811         ASSERT_LSM_MAGIC(lsm);
1812
1813         if (!exp || !exp->exp_obd)
1814                 RETURN(-ENODEV);
1815
1816         lov = &exp->exp_obd->u.lov;
1817         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1818                 struct lov_stripe_md submd;
1819                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1820
1821                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1822                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1823                         continue;
1824                 }
1825
1826                 LASSERT_SEQ_IS_MDT(loi->loi_seq);
1827                 submd.lsm_object_id = loi->loi_id;
1828                 submd.lsm_object_seq = loi->loi_seq;
1829                 submd.lsm_stripe_count = 0;
1830                 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1831                                      &submd, it, data);
1832                 if (rc != 0)
1833                         RETURN(rc);
1834         }
1835         RETURN(rc);
1836 }
1837
1838 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1839                       __u32 mode, struct lustre_handle *lockh)
1840 {
1841         struct lov_request_set *set;
1842         struct obd_info oinfo;
1843         struct lov_request *req;
1844         cfs_list_t *pos;
1845         struct lov_obd *lov;
1846         struct lustre_handle *lov_lockhp;
1847         int err = 0, rc = 0;
1848         ENTRY;
1849
1850         ASSERT_LSM_MAGIC(lsm);
1851
1852         if (!exp || !exp->exp_obd)
1853                 RETURN(-ENODEV);
1854
1855         LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
1856         LASSERT(lockh);
1857         lov = &exp->exp_obd->u.lov;
1858         rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
1859         if (rc)
1860                 RETURN(rc);
1861
1862         cfs_list_for_each (pos, &set->set_list) {
1863                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1864                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1865
1866                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
1867                                 req->rq_oi.oi_md, mode, lov_lockhp);
1868                 rc = lov_update_common_set(set, req, rc);
1869                 if (rc) {
1870                         CERROR("error: cancel objid "LPX64" subobj "
1871                                LPX64" on OST idx %d: rc = %d\n",
1872                                lsm->lsm_object_id,
1873                                req->rq_oi.oi_md->lsm_object_id,
1874                                req->rq_idx, rc);
1875                         err = rc;
1876                 }
1877
1878         }
1879         lov_fini_cancel_set(set);
1880         RETURN(err);
1881 }
1882
1883 static int lov_cancel_unused(struct obd_export *exp,
1884                              struct lov_stripe_md *lsm,
1885                              ldlm_cancel_flags_t flags, void *opaque)
1886 {
1887         struct lov_obd *lov;
1888         int rc = 0, i;
1889         ENTRY;
1890
1891         if (!exp || !exp->exp_obd)
1892                 RETURN(-ENODEV);
1893
1894         lov = &exp->exp_obd->u.lov;
1895         if (lsm == NULL) {
1896                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1897                         int err;
1898                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1899                                 continue;
1900
1901                         err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
1902                                                 flags, opaque);
1903                         if (!rc)
1904                                 rc = err;
1905                 }
1906                 RETURN(rc);
1907         }
1908
1909         ASSERT_LSM_MAGIC(lsm);
1910
1911         LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
1912         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1913                 struct lov_stripe_md submd;
1914                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1915                 int err;
1916
1917                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1918                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
1919                         continue;
1920                 }
1921
1922                 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
1923                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1924
1925                 submd.lsm_object_id = loi->loi_id;
1926                 submd.lsm_object_seq = loi->loi_seq;
1927                 submd.lsm_stripe_count = 0;
1928                 err = obd_cancel_unused(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1929                                         &submd, flags, opaque);
1930                 if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1931                         CERROR("error: cancel unused objid "LPX64" subobj "LPX64
1932                                " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
1933                                loi->loi_id, loi->loi_ost_idx, err);
1934                         if (!rc)
1935                                 rc = err;
1936                 }
1937         }
1938         RETURN(rc);
1939 }
1940
1941 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1942 {
1943         struct lov_request_set *lovset = (struct lov_request_set *)data;
1944         int err;
1945         ENTRY;
1946
1947         if (rc)
1948                 cfs_atomic_set(&lovset->set_completes, 0);
1949
1950         err = lov_fini_statfs_set(lovset);
1951         RETURN(rc ? rc : err);
1952 }
1953
1954 static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
1955                             __u64 max_age, struct ptlrpc_request_set *rqset)
1956 {
1957         struct obd_device      *obd = class_exp2obd(exp);
1958         struct lov_request_set *set;
1959         struct lov_request *req;
1960         cfs_list_t *pos;
1961         struct lov_obd *lov;
1962         int rc = 0;
1963         ENTRY;
1964
1965         LASSERT(oinfo != NULL);
1966         LASSERT(oinfo->oi_osfs != NULL);
1967
1968         lov = &obd->u.lov;
1969         rc = lov_prep_statfs_set(obd, oinfo, &set);
1970         if (rc)
1971                 RETURN(rc);
1972
1973         cfs_list_for_each (pos, &set->set_list) {
1974                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1975                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1976                                       &req->rq_oi, max_age, rqset);
1977                 if (rc)
1978                         break;
1979         }
1980
1981         if (rc || cfs_list_empty(&rqset->set_requests)) {
1982                 int err;
1983                 if (rc)
1984                         cfs_atomic_set(&set->set_completes, 0);
1985                 err = lov_fini_statfs_set(set);
1986                 RETURN(rc ? rc : err);
1987         }
1988
1989         LASSERT(rqset->set_interpret == NULL);
1990         rqset->set_interpret = lov_statfs_interpret;
1991         rqset->set_arg = (void *)set;
1992         RETURN(0);
1993 }
1994
1995 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
1996                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1997 {
1998         struct ptlrpc_request_set *set = NULL;
1999         struct obd_info oinfo = { { { 0 } } };
2000         int rc = 0;
2001         ENTRY;
2002
2003
2004         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
2005          * statfs requests */
2006         set = ptlrpc_prep_set();
2007         if (set == NULL)
2008                 RETURN(-ENOMEM);
2009
2010         oinfo.oi_osfs = osfs;
2011         oinfo.oi_flags = flags;
2012         rc = lov_statfs_async(exp, &oinfo, max_age, set);
2013         if (rc == 0)
2014                 rc = ptlrpc_set_wait(set);
2015         ptlrpc_set_destroy(set);
2016
2017         RETURN(rc);
2018 }
2019
2020 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2021                          void *karg, void *uarg)
2022 {
2023         struct obd_device *obddev = class_exp2obd(exp);
2024         struct lov_obd *lov = &obddev->u.lov;
2025         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
2026         struct obd_uuid *uuidp;
2027         ENTRY;
2028
2029         switch (cmd) {
2030         case IOC_OBD_STATFS: {
2031                 struct obd_ioctl_data *data = karg;
2032                 struct obd_device *osc_obd;
2033                 struct obd_statfs stat_buf = {0};
2034                 __u32 index;
2035
2036                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
2037                 if ((index >= count))
2038                         RETURN(-ENODEV);
2039
2040                 if (!lov->lov_tgts[index])
2041                         /* Try again with the next index */
2042                         RETURN(-EAGAIN);
2043                 if (!lov->lov_tgts[index]->ltd_active)
2044                         RETURN(-ENODATA);
2045
2046                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
2047                 if (!osc_obd)
2048                         RETURN(-EINVAL);
2049
2050                 /* copy UUID */
2051                 if (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
2052                                      min((int) data->ioc_plen2,
2053                                          (int) sizeof(struct obd_uuid))))
2054                         RETURN(-EFAULT);
2055
2056                 /* got statfs data */
2057                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
2058                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
2059                                 0);
2060                 if (rc)
2061                         RETURN(rc);
2062                 if (cfs_copy_to_user(data->ioc_pbuf1, &stat_buf,
2063                                      min((int) data->ioc_plen1,
2064                                          (int) sizeof(stat_buf))))
2065                         RETURN(-EFAULT);
2066                 break;
2067         }
2068         case OBD_IOC_LOV_GET_CONFIG: {
2069                 struct obd_ioctl_data *data;
2070                 struct lov_desc *desc;
2071                 char *buf = NULL;
2072                 __u32 *genp;
2073
2074                 len = 0;
2075                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
2076                         RETURN(-EINVAL);
2077
2078                 data = (struct obd_ioctl_data *)buf;
2079
2080                 if (sizeof(*desc) > data->ioc_inllen1) {
2081                         obd_ioctl_freedata(buf, len);
2082                         RETURN(-EINVAL);
2083                 }
2084
2085                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
2086                         obd_ioctl_freedata(buf, len);
2087                         RETURN(-EINVAL);
2088                 }
2089
2090                 if (sizeof(__u32) * count > data->ioc_inllen3) {
2091                         obd_ioctl_freedata(buf, len);
2092                         RETURN(-EINVAL);
2093                 }
2094
2095                 desc = (struct lov_desc *)data->ioc_inlbuf1;
2096                 memcpy(desc, &(lov->desc), sizeof(*desc));
2097
2098                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2099                 genp = (__u32 *)data->ioc_inlbuf3;
2100                 /* the uuid will be empty for deleted OSTs */
2101                 for (i = 0; i < count; i++, uuidp++, genp++) {
2102                         if (!lov->lov_tgts[i])
2103                                 continue;
2104                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
2105                         *genp = lov->lov_tgts[i]->ltd_gen;
2106                 }
2107
2108                 if (cfs_copy_to_user((void *)uarg, buf, len))
2109                         rc = -EFAULT;
2110                 obd_ioctl_freedata(buf, len);
2111                 break;
2112         }
2113         case LL_IOC_LOV_SETSTRIPE:
2114                 rc = lov_setstripe(exp, len, karg, uarg);
2115                 break;
2116         case LL_IOC_LOV_GETSTRIPE:
2117                 rc = lov_getstripe(exp, karg, uarg);
2118                 break;
2119         case LL_IOC_LOV_SETEA:
2120                 rc = lov_setea(exp, karg, uarg);
2121                 break;
2122         case OBD_IOC_QUOTACTL: {
2123                 struct if_quotactl *qctl = karg;
2124                 struct lov_tgt_desc *tgt = NULL;
2125                 struct obd_quotactl *oqctl;
2126
2127                 if (qctl->qc_valid == QC_OSTIDX) {
2128                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
2129                                 RETURN(-EINVAL);
2130
2131                         tgt = lov->lov_tgts[qctl->qc_idx];
2132                         if (!tgt || !tgt->ltd_exp)
2133                                 RETURN(-EINVAL);
2134                 } else if (qctl->qc_valid == QC_UUID) {
2135                         for (i = 0; i < count; i++) {
2136                                 tgt = lov->lov_tgts[i];
2137                                 if (!tgt ||
2138                                     !obd_uuid_equals(&tgt->ltd_uuid,
2139                                                      &qctl->obd_uuid))
2140                                         continue;
2141
2142                                 if (tgt->ltd_exp == NULL)
2143                                         RETURN(-EINVAL);
2144
2145                                 break;
2146                         }
2147                 } else {
2148                         RETURN(-EINVAL);
2149                 }
2150
2151                 if (i >= count)
2152                         RETURN(-EAGAIN);
2153
2154                 LASSERT(tgt && tgt->ltd_exp);
2155                 OBD_ALLOC_PTR(oqctl);
2156                 if (!oqctl)
2157                         RETURN(-ENOMEM);
2158
2159                 QCTL_COPY(oqctl, qctl);
2160                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2161                 if (rc == 0) {
2162                         QCTL_COPY(qctl, oqctl);
2163                         qctl->qc_valid = QC_OSTIDX;
2164                         qctl->obd_uuid = tgt->ltd_uuid;
2165                 }
2166                 OBD_FREE_PTR(oqctl);
2167                 break;
2168         }
2169         default: {
2170                 int set = 0;
2171
2172                 if (count == 0)
2173                         RETURN(-ENOTTY);
2174
2175                 for (i = 0; i < count; i++) {
2176                         int err;
2177                         struct obd_device *osc_obd;
2178
2179                         /* OST was disconnected */
2180                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2181                                 continue;
2182
2183                         /* ll_umount_begin() sets force flag but for lov, not
2184                          * osc. Let's pass it through */
2185                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
2186                         osc_obd->obd_force = obddev->obd_force;
2187                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2188                                             len, karg, uarg);
2189                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2190                                 RETURN(err);
2191                         } else if (err) {
2192                                 if (lov->lov_tgts[i]->ltd_active) {
2193                                         CDEBUG(err == -ENOTTY ?
2194                                                D_IOCTL : D_WARNING,
2195                                                "iocontrol OSC %s on OST "
2196                                                "idx %d cmd %x: err = %d\n",
2197                                                lov_uuid2str(lov, i),
2198                                                i, cmd, err);
2199                                         if (!rc)
2200                                                 rc = err;
2201                                 }
2202                         } else {
2203                                 set = 1;
2204                         }
2205                 }
2206                 if (!set && !rc)
2207                         rc = -EIO;
2208         }
2209         }
2210
2211         RETURN(rc);
2212 }
2213
2214 #define FIEMAP_BUFFER_SIZE 4096
2215
2216 /**
2217  * Non-zero fe_logical indicates that this is a continuation FIEMAP
2218  * call. The local end offset and the device are sent in the first
2219  * fm_extent. This function calculates the stripe number from the index.
2220  * This function returns a stripe_no on which mapping is to be restarted.
2221  *
2222  * This function returns fm_end_offset which is the in-OST offset at which
2223  * mapping should be restarted. If fm_end_offset=0 is returned then caller
2224  * will re-calculate proper offset in next stripe.
2225  * Note that the first extent is passed to lov_get_info via the value field.
2226  *
2227  * \param fiemap fiemap request header
2228  * \param lsm striping information for the file
2229  * \param fm_start logical start of mapping
2230  * \param fm_end logical end of mapping
2231  * \param start_stripe starting stripe will be returned in this
2232  */
2233 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
2234                                    struct lov_stripe_md *lsm, obd_size fm_start,
2235                                    obd_size fm_end, int *start_stripe)
2236 {
2237         obd_size local_end = fiemap->fm_extents[0].fe_logical;
2238         obd_off lun_start, lun_end;
2239         obd_size fm_end_offset;
2240         int stripe_no = -1, i;
2241
2242         if (fiemap->fm_extent_count == 0 ||
2243             fiemap->fm_extents[0].fe_logical == 0)
2244                 return 0;
2245
2246         /* Find out stripe_no from ost_index saved in the fe_device */
2247         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2248                 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
2249                                         fiemap->fm_extents[0].fe_device) {
2250                         stripe_no = i;
2251                         break;
2252                 }
2253         }
2254         if (stripe_no == -1)
2255                 return -EINVAL;
2256
2257         /* If we have finished mapping on previous device, shift logical
2258          * offset to start of next device */
2259         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
2260                                    &lun_start, &lun_end)) != 0 &&
2261                                    local_end < lun_end) {
2262                 fm_end_offset = local_end;
2263                 *start_stripe = stripe_no;
2264         } else {
2265                 /* This is a special value to indicate that caller should
2266                  * calculate offset in next stripe. */
2267                 fm_end_offset = 0;
2268                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
2269         }
2270
2271         return fm_end_offset;
2272 }
2273
2274 /**
2275  * We calculate on which OST the mapping will end. If the length of mapping
2276  * is greater than (stripe_size * stripe_count) then the last_stripe will
2277  * will be one just before start_stripe. Else we check if the mapping
2278  * intersects each OST and find last_stripe.
2279  * This function returns the last_stripe and also sets the stripe_count
2280  * over which the mapping is spread
2281  *
2282  * \param lsm striping information for the file
2283  * \param fm_start logical start of mapping
2284  * \param fm_end logical end of mapping
2285  * \param start_stripe starting stripe of the mapping
2286  * \param stripe_count the number of stripes across which to map is returned
2287  *
2288  * \retval last_stripe return the last stripe of the mapping
2289  */
2290 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
2291                             obd_size fm_end, int start_stripe,
2292                             int *stripe_count)
2293 {
2294         int last_stripe;
2295         obd_off obd_start, obd_end;
2296         int i, j;
2297
2298         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
2299                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
2300                                                               start_stripe - 1);
2301                 *stripe_count = lsm->lsm_stripe_count;
2302         } else {
2303                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
2304                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
2305                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
2306                                                    &obd_start, &obd_end)) == 0)
2307                                 break;
2308                 }
2309                 *stripe_count = j;
2310                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
2311         }
2312
2313         return last_stripe;
2314 }
2315
2316 /**
2317  * Set fe_device and copy extents from local buffer into main return buffer.
2318  *
2319  * \param fiemap fiemap request header
2320  * \param lcl_fm_ext array of local fiemap extents to be copied
2321  * \param ost_index OST index to be written into the fm_device field for each
2322                     extent
2323  * \param ext_count number of extents to be copied
2324  * \param current_extent where to start copying in main extent array
2325  */
2326 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
2327                                   struct ll_fiemap_extent *lcl_fm_ext,
2328                                   int ost_index, unsigned int ext_count,
2329                                   int current_extent)
2330 {
2331         char *to;
2332         int ext;
2333
2334         for (ext = 0; ext < ext_count; ext++) {
2335                 lcl_fm_ext[ext].fe_device = ost_index;
2336                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
2337         }
2338
2339         /* Copy fm_extent's from fm_local to return buffer */
2340         to = (char *)fiemap + fiemap_count_to_size(current_extent);
2341         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
2342 }
2343
2344 /**
2345  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
2346  * This also handles the restarting of FIEMAP calls in case mapping overflows
2347  * the available number of extents in single call.
2348  */
2349 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
2350                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
2351 {
2352         struct ll_fiemap_info_key *fm_key = key;
2353         struct ll_user_fiemap *fiemap = val;
2354         struct ll_user_fiemap *fm_local = NULL;
2355         struct ll_fiemap_extent *lcl_fm_ext;
2356         int count_local;
2357         unsigned int get_num_extents = 0;
2358         int ost_index = 0, actual_start_stripe, start_stripe;
2359         obd_size fm_start, fm_end, fm_length, fm_end_offset;
2360         obd_size curr_loc;
2361         int current_extent = 0, rc = 0, i;
2362         int ost_eof = 0; /* EOF for object */
2363         int ost_done = 0; /* done with required mapping for this OST? */
2364         int last_stripe;
2365         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
2366         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
2367
2368         if (lsm == NULL)
2369                 GOTO(out, rc = 0);
2370
2371         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
2372                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
2373
2374         OBD_ALLOC_LARGE(fm_local, buffer_size);
2375         if (fm_local == NULL)
2376                 GOTO(out, rc = -ENOMEM);
2377         lcl_fm_ext = &fm_local->fm_extents[0];
2378
2379         count_local = fiemap_size_to_count(buffer_size);
2380
2381         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
2382         fm_start = fiemap->fm_start;
2383         fm_length = fiemap->fm_length;
2384         /* Calculate start stripe, last stripe and length of mapping */
2385         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
2386         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
2387                                                 fm_start + fm_length - 1);
2388         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
2389         if (fm_end > fm_key->oa.o_size)
2390                 fm_end = fm_key->oa.o_size;
2391
2392         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
2393                                             actual_start_stripe, &stripe_count);
2394
2395         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start,
2396                                                   fm_end, &start_stripe);
2397         if (fm_end_offset == -EINVAL)
2398                 return -EINVAL;
2399
2400         if (fiemap->fm_extent_count == 0) {
2401                 get_num_extents = 1;
2402                 count_local = 0;
2403         }
2404
2405         /* Check each stripe */
2406         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
2407              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
2408                 obd_size req_fm_len; /* Stores length of required mapping */
2409                 obd_size len_mapped_single_call;
2410                 obd_off lun_start, lun_end, obd_object_end;
2411                 unsigned int ext_count;
2412
2413                 cur_stripe_wrap = cur_stripe;
2414
2415                 /* Find out range of mapping on this stripe */
2416                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
2417                                            &lun_start, &obd_object_end)) == 0)
2418                         continue;
2419
2420                 /* If this is a continuation FIEMAP call and we are on
2421                  * starting stripe then lun_start needs to be set to
2422                  * fm_end_offset */
2423                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
2424                         lun_start = fm_end_offset;
2425
2426                 if (fm_length != ~0ULL) {
2427                         /* Handle fm_start + fm_length overflow */
2428                         if (fm_start + fm_length < fm_start)
2429                                 fm_length = ~0ULL - fm_start;
2430                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
2431                                                      cur_stripe);
2432                 } else {
2433                         lun_end = ~0ULL;
2434                 }
2435
2436                 if (lun_start == lun_end)
2437                         continue;
2438
2439                 req_fm_len = obd_object_end - lun_start;
2440                 fm_local->fm_length = 0;
2441                 len_mapped_single_call = 0;
2442
2443                 /* If the output buffer is very large and the objects have many
2444                  * extents we may need to loop on a single OST repeatedly */
2445                 ost_eof = 0;
2446                 ost_done = 0;
2447                 do {
2448                         if (get_num_extents == 0) {
2449                                 /* Don't get too many extents. */
2450                                 if (current_extent + count_local >
2451                                     fiemap->fm_extent_count)
2452                                         count_local = fiemap->fm_extent_count -
2453                                                                  current_extent;
2454                         }
2455
2456                         lun_start += len_mapped_single_call;
2457                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
2458                         req_fm_len = fm_local->fm_length;
2459                         fm_local->fm_extent_count = count_local;
2460                         fm_local->fm_mapped_extents = 0;
2461                         fm_local->fm_flags = fiemap->fm_flags;
2462
2463                         fm_key->oa.o_id = lsm->lsm_oinfo[cur_stripe]->loi_id;
2464                         fm_key->oa.o_seq = lsm->lsm_oinfo[cur_stripe]->loi_seq;
2465                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
2466
2467                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
2468                                 GOTO(out, rc = -EINVAL);
2469
2470                         /* If OST is inactive, return extent with UNKNOWN flag */
2471                         if (!lov->lov_tgts[ost_index]->ltd_active) {
2472                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
2473                                 fm_local->fm_mapped_extents = 1;
2474
2475                                 lcl_fm_ext[0].fe_logical = lun_start;
2476                                 lcl_fm_ext[0].fe_length = obd_object_end -
2477                                                                       lun_start;
2478                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
2479
2480                                 goto inactive_tgt;
2481                         }
2482
2483                         fm_local->fm_start = lun_start;
2484                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
2485                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
2486                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
2487                         rc = obd_get_info(NULL,
2488                                           lov->lov_tgts[ost_index]->ltd_exp,
2489                                           keylen, key, vallen, fm_local, lsm);
2490                         if (rc != 0)
2491                                 GOTO(out, rc);
2492
2493 inactive_tgt:
2494                         ext_count = fm_local->fm_mapped_extents;
2495                         if (ext_count == 0) {
2496                                 ost_done = 1;
2497                                 /* If last stripe has hole at the end,
2498                                  * then we need to return */
2499                                 if (cur_stripe_wrap == last_stripe) {
2500                                         fiemap->fm_mapped_extents = 0;
2501                                         goto finish;
2502                                 }
2503                                 break;
2504                         }
2505
2506                         /* If we just need num of extents then go to next device */
2507                         if (get_num_extents) {
2508                                 current_extent += ext_count;
2509                                 break;
2510                         }
2511
2512                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2513                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2514
2515                         /* Have we finished mapping on this device? */
2516                         if (req_fm_len <= len_mapped_single_call)
2517                                 ost_done = 1;
2518
2519                         /* Clear the EXTENT_LAST flag which can be present on
2520                          * last extent */
2521                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2522                                 lcl_fm_ext[ext_count - 1].fe_flags &=
2523                                                             ~FIEMAP_EXTENT_LAST;
2524
2525                         curr_loc = lov_stripe_size(lsm,
2526                                            lcl_fm_ext[ext_count - 1].fe_logical+
2527                                            lcl_fm_ext[ext_count - 1].fe_length,
2528                                            cur_stripe);
2529                         if (curr_loc >= fm_key->oa.o_size)
2530                                 ost_eof = 1;
2531
2532                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2533                                                      ost_index, ext_count,
2534                                                      current_extent);
2535
2536                         current_extent += ext_count;
2537
2538                         /* Ran out of available extents? */
2539                         if (current_extent >= fiemap->fm_extent_count)
2540                                 goto finish;
2541                 } while (ost_done == 0 && ost_eof == 0);
2542
2543                 if (cur_stripe_wrap == last_stripe)
2544                         goto finish;
2545         }
2546
2547 finish:
2548         /* Indicate that we are returning device offsets unless file just has
2549          * single stripe */
2550         if (lsm->lsm_stripe_count > 1)
2551                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2552
2553         if (get_num_extents)
2554                 goto skip_last_device_calc;
2555
2556         /* Check if we have reached the last stripe and whether mapping for that
2557          * stripe is done. */
2558         if (cur_stripe_wrap == last_stripe) {
2559                 if (ost_done || ost_eof)
2560                         fiemap->fm_extents[current_extent - 1].fe_flags |=
2561                                                              FIEMAP_EXTENT_LAST;
2562         }
2563
2564 skip_last_device_calc:
2565         fiemap->fm_mapped_extents = current_extent;
2566
2567 out:
2568         OBD_FREE_LARGE(fm_local, buffer_size);
2569         return rc;
2570 }
2571
2572 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
2573                         __u32 keylen, void *key, __u32 *vallen, void *val,
2574                         struct lov_stripe_md *lsm)
2575 {
2576         struct obd_device *obddev = class_exp2obd(exp);
2577         struct lov_obd *lov = &obddev->u.lov;
2578         int i, rc;
2579         ENTRY;
2580
2581         if (!vallen || !val)
2582                 RETURN(-EFAULT);
2583
2584         obd_getref(obddev);
2585
2586         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2587                 struct {
2588                         char name[16];
2589                         struct ldlm_lock *lock;
2590                 } *data = key;
2591                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2592                 struct lov_oinfo *loi;
2593                 __u32 *stripe = val;
2594
2595                 if (*vallen < sizeof(*stripe))
2596                         GOTO(out, rc = -EFAULT);
2597                 *vallen = sizeof(*stripe);
2598
2599                 /* XXX This is another one of those bits that will need to
2600                  * change if we ever actually support nested LOVs.  It uses
2601                  * the lock's export to find out which stripe it is. */
2602                 /* XXX - it's assumed all the locks for deleted OSTs have
2603                  * been cancelled. Also, the export for deleted OSTs will
2604                  * be NULL and won't match the lock's export. */
2605                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2606                         loi = lsm->lsm_oinfo[i];
2607                         if (!lov->lov_tgts[loi->loi_ost_idx])
2608                                 continue;
2609                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2610                             data->lock->l_conn_export &&
2611                             osc_res_name_eq(loi->loi_id, loi->loi_seq, res_id)) {
2612                                 *stripe = i;
2613                                 GOTO(out, rc = 0);
2614                         }
2615                 }
2616                 LDLM_ERROR(data->lock, "lock on inode without such object");
2617                 dump_lsm(D_ERROR, lsm);
2618                 GOTO(out, rc = -ENXIO);
2619         } else if (KEY_IS(KEY_LAST_ID)) {
2620                 struct obd_id_info *info = val;
2621                 __u32 size = sizeof(obd_id);
2622                 struct lov_tgt_desc *tgt;
2623
2624                 LASSERT(*vallen == sizeof(struct obd_id_info));
2625                 tgt = lov->lov_tgts[info->idx];
2626
2627                 if (!tgt || !tgt->ltd_active)
2628                         GOTO(out, rc = -ESRCH);
2629
2630                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
2631                                   &size, info->data, NULL);
2632                 GOTO(out, rc = 0);
2633         } else if (KEY_IS(KEY_LOVDESC)) {
2634                 struct lov_desc *desc_ret = val;
2635                 *desc_ret = lov->desc;
2636
2637                 GOTO(out, rc = 0);
2638         } else if (KEY_IS(KEY_FIEMAP)) {
2639                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2640                 GOTO(out, rc);
2641         } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2642                 struct lov_tgt_desc *tgt;
2643                 __u64 ost_idx = *((__u64*)val);
2644
2645                 LASSERT(*vallen == sizeof(__u64));
2646                 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2647                 tgt = lov->lov_tgts[ost_idx];
2648
2649                 if (!tgt || !tgt->ltd_exp)
2650                         GOTO(out, rc = -ESRCH);
2651
2652                 *((__u64*)val) = tgt->ltd_exp->exp_connect_flags;
2653                 GOTO(out, rc = 0);
2654         } else if (KEY_IS(KEY_TGT_COUNT)) {
2655                 *((int *)val) = lov->desc.ld_tgt_count;
2656                 GOTO(out, rc = 0);
2657         }
2658
2659         rc = -EINVAL;
2660
2661 out:
2662         obd_putref(obddev);
2663         RETURN(rc);
2664 }
2665
2666 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
2667                               obd_count keylen, void *key, obd_count vallen,
2668                               void *val, struct ptlrpc_request_set *set)
2669 {
2670         struct obd_device *obddev = class_exp2obd(exp);
2671         struct lov_obd *lov = &obddev->u.lov;
2672         obd_count count;
2673         int i, rc = 0, err;
2674         struct lov_tgt_desc *tgt;
2675         unsigned incr, check_uuid,
2676                  do_inactive, no_set;
2677         unsigned next_id = 0,  mds_con = 0, capa = 0;
2678         ENTRY;
2679
2680         incr = check_uuid = do_inactive = no_set = 0;
2681         if (set == NULL) {
2682                 no_set = 1;
2683                 set = ptlrpc_prep_set();
2684                 if (!set)
2685                         RETURN(-ENOMEM);
2686         }
2687
2688         obd_getref(obddev);
2689         count = lov->desc.ld_tgt_count;
2690
2691         if (KEY_IS(KEY_NEXT_ID)) {
2692                 count = vallen / sizeof(struct obd_id_info);
2693                 vallen = sizeof(obd_id);
2694                 incr = sizeof(struct obd_id_info);
2695                 do_inactive = 1;
2696                 next_id = 1;
2697         } else if (KEY_IS(KEY_CHECKSUM)) {
2698                 do_inactive = 1;
2699         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2700                 /* use defaults:  do_inactive = incr = 0; */
2701         } else if (KEY_IS(KEY_MDS_CONN)) {
2702                 mds_con = 1;
2703         } else if (KEY_IS(KEY_CAPA_KEY)) {
2704                 capa = 1;
2705         }
2706
2707         for (i = 0; i < count; i++, val = (char *)val + incr) {
2708                 if (next_id) {
2709                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2710                 } else {
2711                         tgt = lov->lov_tgts[i];
2712                 }
2713                 /* OST was disconnected */
2714                 if (!tgt || !tgt->ltd_exp)
2715                         continue;
2716
2717                 /* OST is inactive and we don't want inactive OSCs */
2718                 if (!tgt->ltd_active && !do_inactive)
2719                         continue;
2720
2721                 if (mds_con) {
2722                         struct mds_group_info *mgi;
2723
2724                         LASSERT(vallen == sizeof(*mgi));
2725                         mgi = (struct mds_group_info *)val;
2726
2727                         /* Only want a specific OSC */
2728                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2729                                                 &tgt->ltd_uuid))
2730                                 continue;
2731
2732                         err = obd_set_info_async(env, tgt->ltd_exp,
2733                                          keylen, key, sizeof(int),
2734                                          &mgi->group, set);
2735                 } else if (next_id) {
2736                         err = obd_set_info_async(env, tgt->ltd_exp,
2737                                          keylen, key, vallen,
2738                                          ((struct obd_id_info*)val)->data, set);
2739                 } else if (capa) {
2740                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2741
2742                         LASSERT(vallen == sizeof(*info));
2743
2744                          /* Only want a specific OSC */
2745                         if (info->uuid &&
2746                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2747                                 continue;
2748
2749                         err = obd_set_info_async(env, tgt->ltd_exp, keylen,
2750                                                  key, sizeof(*info->capa),
2751                                                  info->capa, set);
2752                 } else {
2753                         /* Only want a specific OSC */
2754                         if (check_uuid &&
2755                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2756                                 continue;
2757
2758                         err = obd_set_info_async(env, tgt->ltd_exp,
2759                                          keylen, key, vallen, val, set);
2760                 }
2761
2762                 if (!rc)
2763                         rc = err;
2764         }
2765
2766         obd_putref(obddev);
2767         if (no_set) {
2768                 err = ptlrpc_set_wait(set);
2769                 if (!rc)
2770                         rc = err;
2771                 ptlrpc_set_destroy(set);
2772         }
2773         RETURN(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         lov_do_div64(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 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
2818                         struct obd_quotactl *oqctl)
2819 {
2820         struct lov_obd      *lov = &obd->u.lov;
2821         struct lov_tgt_desc *tgt;
2822         __u64                curspace = 0;
2823         __u64                bhardlimit = 0;
2824         int                  i, rc = 0;
2825         ENTRY;
2826
2827         if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON &&
2828             oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF &&
2829             oqctl->qc_cmd != Q_GETOQUOTA &&
2830             oqctl->qc_cmd != Q_INITQUOTA &&
2831             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
2832             oqctl->qc_cmd != Q_FINVALIDATE) {
2833                 CERROR("bad quota opc %x for lov obd", oqctl->qc_cmd);
2834                 RETURN(-EFAULT);
2835         }
2836
2837         /* for lov tgt */
2838         obd_getref(obd);
2839         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2840                 int err;
2841
2842                 tgt = lov->lov_tgts[i];
2843
2844                 if (!tgt)
2845                         continue;
2846
2847                 if (!tgt->ltd_active || tgt->ltd_reap) {
2848                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
2849                             lov->lov_tgts[i]->ltd_activate) {
2850                                 rc = -EREMOTEIO;
2851                                 CERROR("ost %d is inactive\n", i);
2852                         } else {
2853                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
2854                         }
2855                         continue;
2856                 }
2857
2858                 err = obd_quotactl(tgt->ltd_exp, oqctl);
2859                 if (err) {
2860                         if (tgt->ltd_active && !rc)
2861                                 rc = err;
2862                         continue;
2863                 }
2864
2865                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2866                         curspace += oqctl->qc_dqblk.dqb_curspace;
2867                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
2868                 }
2869         }
2870         obd_putref(obd);
2871
2872         if (oqctl->qc_cmd == Q_GETOQUOTA) {
2873                 oqctl->qc_dqblk.dqb_curspace = curspace;
2874                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
2875         }
2876         RETURN(rc);
2877 }
2878
2879 static int lov_quotacheck(struct obd_device *obd, struct obd_export *exp,
2880                           struct obd_quotactl *oqctl)
2881 {
2882         struct lov_obd *lov = &obd->u.lov;
2883         int             i, rc = 0;
2884         ENTRY;
2885
2886         obd_getref(obd);
2887
2888         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2889                 if (!lov->lov_tgts[i])
2890                         continue;
2891
2892                 /* Skip quota check on the administratively disabled OSTs. */
2893                 if (!lov->lov_tgts[i]->ltd_activate) {
2894                         CWARN("lov idx %d was administratively disabled, "
2895                               "skip quotacheck on it.\n", i);
2896                         continue;
2897                 }
2898
2899                 if (!lov->lov_tgts[i]->ltd_active) {
2900                         CERROR("lov idx %d inactive\n", i);
2901                         rc = -EIO;
2902                         goto out;
2903                 }
2904         }
2905
2906         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2907                 int err;
2908
2909                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate)
2910                         continue;
2911
2912                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
2913                 if (err && !rc)
2914                         rc = err;
2915         }
2916
2917 out:
2918         obd_putref(obd);
2919
2920         RETURN(rc);
2921 }
2922
2923 int lov_quota_adjust_qunit(struct obd_export *exp,
2924                            struct quota_adjust_qunit *oqaq,
2925                            struct lustre_quota_ctxt *qctxt,
2926                            struct ptlrpc_request_set *rqset)
2927 {
2928         struct obd_device *obd = class_exp2obd(exp);
2929         struct lov_obd    *lov = &obd->u.lov;
2930         int                i, err, rc = 0;
2931         unsigned           no_set = 0;
2932         ENTRY;
2933
2934         if (!QAQ_IS_ADJBLK(oqaq)) {
2935                 CERROR("bad qaq_flags %x for lov obd.\n", oqaq->qaq_flags);
2936                 RETURN(-EFAULT);
2937         }
2938
2939         if (rqset == NULL) {
2940                 rqset = ptlrpc_prep_set();
2941                 if (!rqset)
2942                         RETURN(-ENOMEM);
2943                 no_set = 1;
2944         }
2945
2946         obd_getref(obd);
2947         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2948
2949                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active) {
2950                         CDEBUG(D_HA, "ost %d is inactive\n", i);
2951                         continue;
2952                 }
2953
2954                 err = obd_quota_adjust_qunit(lov->lov_tgts[i]->ltd_exp, oqaq,
2955                                              NULL, rqset);
2956                 if (err) {
2957                         if (lov->lov_tgts[i]->ltd_active && !rc)
2958                                 rc = err;
2959                         continue;
2960                 }
2961         }
2962
2963         err = ptlrpc_set_wait(rqset);
2964         if (!rc)
2965                 rc = err;
2966
2967         /* Destroy the set if none was provided by the caller */
2968         if (no_set)
2969                 ptlrpc_set_destroy(rqset);
2970
2971         obd_putref(obd);
2972         RETURN(rc);
2973 }
2974
2975 struct obd_ops lov_obd_ops = {
2976         .o_owner               = THIS_MODULE,
2977         .o_setup               = lov_setup,
2978         .o_precleanup          = lov_precleanup,
2979         .o_cleanup             = lov_cleanup,
2980         //.o_process_config      = lov_process_config,
2981         .o_connect             = lov_connect,
2982         .o_disconnect          = lov_disconnect,
2983         .o_statfs              = lov_statfs,
2984         .o_statfs_async        = lov_statfs_async,
2985         .o_packmd              = lov_packmd,
2986         .o_unpackmd            = lov_unpackmd,
2987         .o_create              = lov_create,
2988         .o_destroy             = lov_destroy,
2989         .o_getattr             = lov_getattr,
2990         .o_getattr_async       = lov_getattr_async,
2991         .o_setattr             = lov_setattr,
2992         .o_setattr_async       = lov_setattr_async,
2993         .o_brw                 = lov_brw,
2994         .o_merge_lvb           = lov_merge_lvb,
2995         .o_adjust_kms          = lov_adjust_kms,
2996         .o_punch               = lov_punch,
2997         .o_sync                = lov_sync,
2998         .o_enqueue             = lov_enqueue,
2999         .o_change_cbdata       = lov_change_cbdata,
3000         .o_find_cbdata         = lov_find_cbdata,
3001         .o_cancel              = lov_cancel,
3002         .o_cancel_unused       = lov_cancel_unused,
3003         .o_iocontrol           = lov_iocontrol,
3004         .o_get_info            = lov_get_info,
3005         .o_set_info_async      = lov_set_info_async,
3006         .o_extent_calc         = lov_extent_calc,
3007         .o_llog_init           = lov_llog_init,
3008         .o_llog_finish         = lov_llog_finish,
3009         .o_notify              = lov_notify,
3010         .o_pool_new            = lov_pool_new,
3011         .o_pool_rem            = lov_pool_remove,
3012         .o_pool_add            = lov_pool_add,
3013         .o_pool_del            = lov_pool_del,
3014         .o_getref              = lov_getref,
3015         .o_putref              = lov_putref,
3016         .o_quotactl            = lov_quotactl,
3017         .o_quotacheck          = lov_quotacheck,
3018         .o_quota_adjust_qunit  = lov_quota_adjust_qunit,
3019 };
3020
3021 static quota_interface_t *quota_interface;
3022 extern quota_interface_t lov_quota_interface;
3023
3024 cfs_mem_cache_t *lov_oinfo_slab;
3025
3026 extern struct lu_kmem_descr lov_caches[];
3027
3028 int __init lov_init(void)
3029 {
3030         struct lprocfs_static_vars lvars = { 0 };
3031         int rc, rc2;
3032         ENTRY;
3033
3034         /* print an address of _any_ initialized kernel symbol from this
3035          * module, to allow debugging with gdb that doesn't support data
3036          * symbols from modules.*/
3037         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
3038
3039         rc = lu_kmem_init(lov_caches);
3040         if (rc)
3041                 return rc;
3042
3043         lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo",
3044                                               sizeof(struct lov_oinfo),
3045                                               0, CFS_SLAB_HWCACHE_ALIGN);
3046         if (lov_oinfo_slab == NULL) {
3047                 lu_kmem_fini(lov_caches);
3048                 return -ENOMEM;
3049         }
3050         lprocfs_lov_init_vars(&lvars);
3051
3052         cfs_request_module("lquota");
3053         quota_interface = PORTAL_SYMBOL_GET(lov_quota_interface);
3054         init_obd_quota_ops(quota_interface, &lov_obd_ops);
3055
3056         rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
3057                                  LUSTRE_LOV_NAME, &lov_device_type);
3058
3059         if (rc) {
3060                 if (quota_interface)
3061                         PORTAL_SYMBOL_PUT(lov_quota_interface);
3062                 rc2 = cfs_mem_cache_destroy(lov_oinfo_slab);
3063                 LASSERT(rc2 == 0);
3064                 lu_kmem_fini(lov_caches);
3065         }
3066
3067         RETURN(rc);
3068 }
3069
3070 #ifdef __KERNEL__
3071 static void /*__exit*/ lov_exit(void)
3072 {
3073         int rc;
3074
3075         if (quota_interface)
3076                 PORTAL_SYMBOL_PUT(lov_quota_interface);
3077
3078         class_unregister_type(LUSTRE_LOV_NAME);
3079         rc = cfs_mem_cache_destroy(lov_oinfo_slab);
3080         LASSERT(rc == 0);
3081
3082         lu_kmem_fini(lov_caches);
3083 }
3084
3085 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3086 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
3087 MODULE_LICENSE("GPL");
3088
3089 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
3090 #endif