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, 2013, Intel Corporation.
  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_ioctl.h>
  53 #include <lustre_lib.h>
  54 #include <lustre_net.h>
  55 #include <lustre/lustre_idl.h>
  56 #include <lustre_dlm.h>
  57 #include <lustre_mds.h>
  58 #include <obd_class.h>
  59 #include <lprocfs_status.h>
  60 #include <lustre_param.h>
  61 #include <cl_object.h>
  62 #include <lclient.h>
  63 #include <lustre/ll_fiemap.h>
  64 #include <lustre_fid.h>
  65
  66 #include "lov_internal.h"
  67
  68 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  69    Any function that expects lov_tgts to remain stationary must take a ref. */
  70 static void lov_getref(struct obd_device *obd)
  71 {
  72         struct lov_obd *lov = &obd->u.lov;
  73
  74         /* nobody gets through here until lov_putref is done */
  75         mutex_lock(&lov->lov_lock);
  76         atomic_inc(&lov->lov_refcount);
  77         mutex_unlock(&lov->lov_lock);
  78         return;
  79 }
  80
  81 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  82
  83 static void lov_putref(struct obd_device *obd)
  84 {
  85         struct lov_obd *lov = &obd->u.lov;
  86
  87         mutex_lock(&lov->lov_lock);
  88         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  89         if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  90                 struct list_head kill = LIST_HEAD_INIT(kill);
  91                 struct lov_tgt_desc *tgt, *n;
  92                 int i;
  93
  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                         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                 mutex_unlock(&lov->lov_lock);
 110
 111                 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 112                         list_del(&tgt->ltd_kill);
 113                         /* Disconnect */
 114                         __lov_del_obd(obd, tgt);
 115                 }
 116         } else {
 117                 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 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 127                     struct obd_connect_data *data)
 128 {
 129         struct lov_obd *lov = &obd->u.lov;
 130         struct obd_uuid *tgt_uuid;
 131         struct obd_device *tgt_obd;
 132         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 133         struct obd_import *imp;
 134         int rc;
 135         ENTRY;
 136
 137         if (lov->lov_tgts[index] == NULL)
 138                 RETURN(-EINVAL);
 139
 140         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 141         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 142
 143         if (!tgt_obd->obd_set_up) {
 144                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 145                 RETURN(-EINVAL);
 146         }
 147
 148         /* override the sp_me from lov */
 149         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 150
 151         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 152                 data->ocd_index = index;
 153
 154         /*
 155          * Divine LOV knows that OBDs under it are OSCs.
 156          */
 157         imp = tgt_obd->u.cli.cl_import;
 158
 159         if (activate) {
 160                 tgt_obd->obd_no_recov = 0;
 161                 /* FIXME this is probably supposed to be
 162                    ptlrpc_set_import_active.  Horrible naming. */
 163                 ptlrpc_activate_import(imp);
 164         }
 165
 166         rc = obd_register_observer(tgt_obd, obd);
 167         if (rc) {
 168                 CERROR("Target %s register_observer error %d\n",
 169                        obd_uuid2str(tgt_uuid), rc);
 170                 RETURN(rc);
 171         }
 172
 173
 174         if (imp->imp_invalid) {
 175                 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
 176                        "disabled\n", obd_uuid2str(tgt_uuid));
 177                 RETURN(0);
 178         }
 179
 180         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 181                          &lov_osc_uuid, data, NULL);
 182         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 183                 CERROR("Target %s connect error %d\n",
 184                        obd_uuid2str(tgt_uuid), rc);
 185                 RETURN(-ENODEV);
 186         }
 187
 188         lov->lov_tgts[index]->ltd_reap = 0;
 189
 190         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 191                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 192
 193         if (lov->targets_proc_entry != NULL) {
 194                 struct proc_dir_entry *osc_symlink;
 195                 struct obd_device *osc_obd;
 196
 197                 osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
 198
 199                 LASSERT(osc_obd != NULL);
 200                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
 201                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 202
 203                 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name,
 204                                                   lov->targets_proc_entry,
 205                                                   "../../../%s/%s",
 206                                                   osc_obd->obd_type->typ_name,
 207                                                   osc_obd->obd_name);
 208                 if (osc_symlink == NULL) {
 209                         CERROR("cannot register LOV target "
 210                                "/proc/fs/lustre/%s/%s/target_obds/%s\n",
 211                                obd->obd_type->typ_name, obd->obd_name,
 212                                osc_obd->obd_name);
 213                 }
 214         }
 215         RETURN(0);
 216 }
 217
 218 static int lov_connect(const struct lu_env *env,
 219                        struct obd_export **exp, struct obd_device *obd,
 220                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 221                        void *localdata)
 222 {
 223         struct lov_obd *lov = &obd->u.lov;
 224         struct lov_tgt_desc *tgt;
 225         struct lustre_handle conn;
 226         int i, rc;
 227         ENTRY;
 228
 229         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 230
 231         rc = class_connect(&conn, obd, cluuid);
 232         if (rc)
 233                 RETURN(rc);
 234
 235         *exp = class_conn2export(&conn);
 236
 237         /* Why should there ever be more than 1 connect? */
 238         lov->lov_connects++;
 239         LASSERT(lov->lov_connects == 1);
 240
 241         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 242         if (data)
 243                 lov->lov_ocd = *data;
 244
 245         lov->targets_proc_entry = lprocfs_seq_register("target_obds",
 246                                                        obd->obd_proc_entry,
 247                                                        NULL, NULL);
 248         if (IS_ERR(lov->targets_proc_entry)) {
 249                 CERROR("%s: cannot register "
 250                        "/proc/fs/lustre/%s/%s/target_obds\n",
 251                        obd->obd_name, obd->obd_type->typ_name, obd->obd_name);
 252                 lov->targets_proc_entry = NULL;
 253         }
 254
 255         obd_getref(obd);
 256         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 257                 tgt = lov->lov_tgts[i];
 258                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 259                         continue;
 260                 /* Flags will be lowest common denominator */
 261                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 262                 if (rc) {
 263                         CERROR("%s: lov connect tgt %d failed: %d\n",
 264                                obd->obd_name, i, rc);
 265                         continue;
 266                 }
 267                 /* connect to administrative disabled ost */
 268                 if (!lov->lov_tgts[i]->ltd_exp)
 269                         continue;
 270
 271                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 272                                 OBD_NOTIFY_CONNECT, (void *)&i);
 273                 if (rc) {
 274                         CERROR("%s error sending notify %d\n",
 275                                obd->obd_name, rc);
 276                 }
 277         }
 278         obd_putref(obd);
 279
 280         RETURN(0);
 281 }
 282
 283 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 284 {
 285         struct lov_obd *lov = &obd->u.lov;
 286         struct obd_device *osc_obd;
 287         int rc;
 288         ENTRY;
 289
 290         osc_obd = class_exp2obd(tgt->ltd_exp);
 291         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 292                obd->obd_name, osc_obd->obd_name);
 293
 294         if (tgt->ltd_active) {
 295                 tgt->ltd_active = 0;
 296                 lov->desc.ld_active_tgt_count--;
 297                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 298         }
 299
 300         if (osc_obd) {
 301                 /* Pass it on to our clients.
 302                  * XXX This should be an argument to disconnect,
 303                  * XXX not a back-door flag on the OBD.  Ah well.
 304                  */
 305                 osc_obd->obd_force = obd->obd_force;
 306                 osc_obd->obd_fail = obd->obd_fail;
 307                 osc_obd->obd_no_recov = obd->obd_no_recov;
 308
 309                 if (lov->targets_proc_entry != NULL)
 310                         lprocfs_remove_proc_entry(osc_obd->obd_name,
 311                                                   lov->targets_proc_entry);
 312         }
 313
 314         obd_register_observer(osc_obd, NULL);
 315
 316         rc = obd_disconnect(tgt->ltd_exp);
 317         if (rc) {
 318                 CERROR("Target %s disconnect error %d\n",
 319                        tgt->ltd_uuid.uuid, rc);
 320                 rc = 0;
 321         }
 322
 323         tgt->ltd_exp = NULL;
 324         RETURN(0);
 325 }
 326
 327 static int lov_disconnect(struct obd_export *exp)
 328 {
 329         struct obd_device *obd = class_exp2obd(exp);
 330         struct lov_obd *lov = &obd->u.lov;
 331         int i, rc;
 332         ENTRY;
 333
 334         if (!lov->lov_tgts)
 335                 goto out;
 336
 337         /* Only disconnect the underlying layers on the final disconnect. */
 338         lov->lov_connects--;
 339         if (lov->lov_connects != 0) {
 340                 /* why should there be more than 1 connect? */
 341                 CERROR("disconnect #%d\n", lov->lov_connects);
 342                 goto out;
 343         }
 344
 345         /* Let's hold another reference so lov_del_obd doesn't spin through
 346            putref every time */
 347         obd_getref(obd);
 348
 349         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 350                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 351                         /* Disconnection is the last we know about an obd */
 352                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
 353                 }
 354         }
 355         obd_putref(obd);
 356
 357         if (lov->targets_proc_entry != NULL)
 358                 lprocfs_remove(&lov->targets_proc_entry);
 359
 360 out:
 361         rc = class_disconnect(exp); /* bz 9811 */
 362         RETURN(rc);
 363 }
 364
 365 /* Error codes:
 366  *
 367  *  -EINVAL  : UUID can't be found in the LOV's target list
 368  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 369  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 370  *  any >= 0 : is log target index
 371  */
 372 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 373                               enum obd_notify_event ev)
 374 {
 375         struct lov_obd *lov = &obd->u.lov;
 376         struct lov_tgt_desc *tgt;
 377         int index, activate, active;
 378         ENTRY;
 379
 380         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 381                lov, uuid->uuid, ev);
 382
 383         obd_getref(obd);
 384         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 385                 tgt = lov->lov_tgts[index];
 386                 if (!tgt)
 387                         continue;
 388                 /*
 389                  * LU-642, initially inactive OSC could miss the obd_connect,
 390                  * we make up for it here.
 391                  */
 392                 if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
 393                     obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 394                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 395
 396                         obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 397                                     &lov_osc_uuid, &lov->lov_ocd, NULL);
 398                 }
 399                 if (!tgt->ltd_exp)
 400                         continue;
 401
 402                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 403                        index, obd_uuid2str(&tgt->ltd_uuid),
 404                        tgt->ltd_exp->exp_handle.h_cookie);
 405                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 406                         break;
 407         }
 408
 409         if (index == lov->desc.ld_tgt_count)
 410                 GOTO(out, index = -EINVAL);
 411
 412         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 413                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 414
 415                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 416                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 417                                uuid->uuid, activate ? "" : "de");
 418                 } else {
 419                         lov->lov_tgts[index]->ltd_activate = activate;
 420                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 421                                activate ? "" : "de", obd_uuid2str(uuid));
 422                 }
 423
 424         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 425                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 426
 427                 if (lov->lov_tgts[index]->ltd_active == active) {
 428                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 429                                uuid->uuid, active ? "" : "in");
 430                         GOTO(out, index);
 431                 } else {
 432                         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 433                                obd_uuid2str(uuid), active ? "" : "in");
 434                 }
 435
 436                 lov->lov_tgts[index]->ltd_active = active;
 437                 if (active) {
 438                         lov->desc.ld_active_tgt_count++;
 439                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 440                 } else {
 441                         lov->desc.ld_active_tgt_count--;
 442                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 443                 }
 444         } else {
 445                 CERROR("%s: unknown event %d for uuid %s\n", obd->obd_name,
 446                        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         struct lov_obd *lov = &obd->u.lov;
 459         ENTRY;
 460
 461         down_read(&lov->lov_notify_lock);
 462         if (!lov->lov_connects) {
 463                 up_read(&lov->lov_notify_lock);
 464                 RETURN(rc);
 465         }
 466
 467         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 468             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 469                 struct obd_uuid *uuid;
 470
 471                 LASSERT(watched);
 472
 473                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 474                         up_read(&lov->lov_notify_lock);
 475                         CERROR("unexpected notification of %s %s!\n",
 476                                watched->obd_type->typ_name,
 477                                watched->obd_name);
 478                         RETURN(-EINVAL);
 479                 }
 480                 uuid = &watched->u.cli.cl_target_uuid;
 481
 482                 /* Set OSC as active before notifying the observer, so the
 483                  * observer can use the OSC normally.
 484                  */
 485                 rc = lov_set_osc_active(obd, uuid, ev);
 486                 if (rc < 0) {
 487                         up_read(&lov->lov_notify_lock);
 488                         CERROR("event(%d) of %s failed: %d\n", ev,
 489                                obd_uuid2str(uuid), rc);
 490                         RETURN(rc);
 491                 }
 492                 /* active event should be pass lov target index as data */
 493                 data = &rc;
 494         }
 495
 496         /* Pass the notification up the chain. */
 497         if (watched) {
 498                 rc = obd_notify_observer(obd, watched, ev, data);
 499         } else {
 500                 /* NULL watched means all osc's in the lov (only for syncs) */
 501                 /* sync event should be send lov idx as data */
 502                 struct lov_obd *lov = &obd->u.lov;
 503                 int i, is_sync;
 504
 505                 data = &i;
 506                 is_sync = (ev == OBD_NOTIFY_SYNC) ||
 507                           (ev == OBD_NOTIFY_SYNC_NONBLOCK);
 508
 509                 obd_getref(obd);
 510                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 511                         if (!lov->lov_tgts[i])
 512                                 continue;
 513
 514                         /* don't send sync event if target not
 515                          * connected/activated */
 516                         if (is_sync &&  !lov->lov_tgts[i]->ltd_active)
 517                                 continue;
 518
 519                         rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
 520                                                  ev, data);
 521                         if (rc) {
 522                                 CERROR("%s: notify %s of %s failed %d\n",
 523                                        obd->obd_name,
 524                                        obd->obd_observer->obd_name,
 525                                        lov->lov_tgts[i]->ltd_obd->obd_name,
 526                                        rc);
 527                         }
 528                 }
 529                 obd_putref(obd);
 530         }
 531
 532         up_read(&lov->lov_notify_lock);
 533         RETURN(rc);
 534 }
 535
 536 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 537                           __u32 index, int gen, int active)
 538 {
 539         struct lov_obd *lov = &obd->u.lov;
 540         struct lov_tgt_desc *tgt;
 541         struct obd_device *tgt_obd;
 542         int rc;
 543         ENTRY;
 544
 545         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 546                uuidp->uuid, index, gen, active);
 547
 548         if (gen <= 0) {
 549                 CERROR("request to add OBD %s with invalid generation: %d\n",
 550                        uuidp->uuid, gen);
 551                 RETURN(-EINVAL);
 552         }
 553
 554         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 555                                         &obd->obd_uuid);
 556         if (tgt_obd == NULL)
 557                 RETURN(-EINVAL);
 558
 559         mutex_lock(&lov->lov_lock);
 560
 561         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 562                 tgt = lov->lov_tgts[index];
 563                 CERROR("UUID %s already assigned at LOV target index %d\n",
 564                        obd_uuid2str(&tgt->ltd_uuid), index);
 565                 mutex_unlock(&lov->lov_lock);
 566                 RETURN(-EEXIST);
 567         }
 568
 569         if (index >= lov->lov_tgt_size) {
 570                 /* We need to reallocate the lov target array. */
 571                 struct lov_tgt_desc **newtgts, **old = NULL;
 572                 __u32 newsize, oldsize = 0;
 573
 574                 newsize = max(lov->lov_tgt_size, (__u32)2);
 575                 while (newsize < index + 1)
 576                         newsize = newsize << 1;
 577                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 578                 if (newtgts == NULL) {
 579                         mutex_unlock(&lov->lov_lock);
 580                         RETURN(-ENOMEM);
 581                 }
 582
 583                 if (lov->lov_tgt_size) {
 584                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 585                                lov->lov_tgt_size);
 586                         old = lov->lov_tgts;
 587                         oldsize = lov->lov_tgt_size;
 588                 }
 589
 590                 lov->lov_tgts = newtgts;
 591                 lov->lov_tgt_size = newsize;
 592                 smp_rmb();
 593                 if (old)
 594                         OBD_FREE(old, sizeof(*old) * oldsize);
 595
 596                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 597                        lov->lov_tgts, lov->lov_tgt_size);
 598         }
 599
 600         OBD_ALLOC_PTR(tgt);
 601         if (!tgt) {
 602                 mutex_unlock(&lov->lov_lock);
 603                 RETURN(-ENOMEM);
 604         }
 605
 606         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 607         if (rc) {
 608                 mutex_unlock(&lov->lov_lock);
 609                 OBD_FREE_PTR(tgt);
 610                 RETURN(rc);
 611         }
 612
 613         tgt->ltd_uuid = *uuidp;
 614         tgt->ltd_obd = tgt_obd;
 615         /* XXX - add a sanity check on the generation number. */
 616         tgt->ltd_gen = gen;
 617         tgt->ltd_index = index;
 618         tgt->ltd_activate = active;
 619         lov->lov_tgts[index] = tgt;
 620         if (index >= lov->desc.ld_tgt_count)
 621                 lov->desc.ld_tgt_count = index + 1;
 622
 623         mutex_unlock(&lov->lov_lock);
 624
 625         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 626                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 627
 628         rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
 629
 630         if (lov->lov_connects == 0) {
 631                 /* lov_connect hasn't been called yet. We'll do the
 632                    lov_connect_obd on this target when that fn first runs,
 633                    because we don't know the connect flags yet. */
 634                 RETURN(0);
 635         }
 636
 637         obd_getref(obd);
 638
 639         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 640         if (rc)
 641                 GOTO(out, rc);
 642
 643         /* connect to administrative disabled ost */
 644         if (!tgt->ltd_exp)
 645                 GOTO(out, rc = 0);
 646
 647         if (lov->lov_cache != NULL) {
 648                 rc = obd_set_info_async(NULL, tgt->ltd_exp,
 649                                 sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 650                                 sizeof(struct cl_client_cache), lov->lov_cache,
 651                                 NULL);
 652                 if (rc < 0)
 653                         GOTO(out, rc);
 654         }
 655
 656         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 657                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
 658                         (void *)&index);
 659
 660 out:
 661         if (rc) {
 662                 CERROR("add failed (%d), deleting %s\n", rc,
 663                        obd_uuid2str(&tgt->ltd_uuid));
 664                 lov_del_target(obd, index, 0, 0);
 665         }
 666         obd_putref(obd);
 667         RETURN(rc);
 668 }
 669
 670 /* Schedule a target for deletion */
 671 int lov_del_target(struct obd_device *obd, __u32 index,
 672                    struct obd_uuid *uuidp, int gen)
 673 {
 674         struct lov_obd *lov = &obd->u.lov;
 675         int count = lov->desc.ld_tgt_count;
 676         int rc = 0;
 677         ENTRY;
 678
 679         if (index >= count) {
 680                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 681                        index, count);
 682                 RETURN(-EINVAL);
 683         }
 684
 685         /* to make sure there's no ongoing lov_notify() now */
 686         down_write(&lov->lov_notify_lock);
 687         obd_getref(obd);
 688
 689         if (!lov->lov_tgts[index]) {
 690                 CERROR("LOV target at index %d is not setup.\n", index);
 691                 GOTO(out, rc = -EINVAL);
 692         }
 693
 694         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 695                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 696                        lov_uuid2str(lov, index), index,
 697                        obd_uuid2str(uuidp));
 698                 GOTO(out, rc = -EINVAL);
 699         }
 700
 701         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 702                lov_uuid2str(lov, index), index,
 703                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 704                lov->lov_tgts[index]->ltd_active);
 705
 706         lov->lov_tgts[index]->ltd_reap = 1;
 707         lov->lov_death_row++;
 708         /* we really delete it from obd_putref */
 709 out:
 710         obd_putref(obd);
 711         up_write(&lov->lov_notify_lock);
 712
 713         RETURN(rc);
 714 }
 715
 716 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 717 {
 718         struct obd_device *osc_obd;
 719
 720         LASSERT(tgt);
 721         LASSERT(tgt->ltd_reap);
 722
 723         osc_obd = class_exp2obd(tgt->ltd_exp);
 724
 725         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 726                tgt->ltd_uuid.uuid,
 727                osc_obd ? osc_obd->obd_name : "<no obd>");
 728
 729         if (tgt->ltd_exp)
 730                 lov_disconnect_obd(obd, tgt);
 731
 732         OBD_FREE_PTR(tgt);
 733
 734         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 735            do it ourselves. And we can't do it from lov_cleanup,
 736            because we just lost our only reference to it. */
 737         if (osc_obd)
 738                 class_manual_cleanup(osc_obd);
 739 }
 740
 741 void lov_fix_desc_stripe_size(__u64 *val)
 742 {
 743         if (*val < LOV_MIN_STRIPE_SIZE) {
 744                 if (*val != 0)
 745                         LCONSOLE_INFO("Increasing default stripe size to "
 746                                       "minimum %u\n",
 747                                       LOV_DESC_STRIPE_SIZE_DEFAULT);
 748                 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
 749         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 750                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 751                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 752                               "multiple of %u)\n",
 753                               *val, LOV_MIN_STRIPE_SIZE);
 754         }
 755 }
 756
 757 void lov_fix_desc_stripe_count(__u32 *val)
 758 {
 759         if (*val == 0)
 760                 *val = 1;
 761 }
 762
 763 void lov_fix_desc_pattern(__u32 *val)
 764 {
 765         /* from lov_setstripe */
 766         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 767                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 768                 *val = 0;
 769         }
 770 }
 771
 772 void lov_fix_desc_qos_maxage(__u32 *val)
 773 {
 774         if (*val == 0)
 775                 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
 776 }
 777
 778 void lov_fix_desc(struct lov_desc *desc)
 779 {
 780         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 781         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 782         lov_fix_desc_pattern(&desc->ld_pattern);
 783         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 784 }
 785
 786 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 787 {
 788         struct lov_desc *desc;
 789         struct lov_obd *lov = &obd->u.lov;
 790 #ifdef LPROCFS
 791         struct obd_type *type;
 792 #endif
 793         int rc;
 794         ENTRY;
 795
 796         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 797                 CERROR("LOV setup requires a descriptor\n");
 798                 RETURN(-EINVAL);
 799         }
 800
 801         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 802
 803         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 804                 CERROR("descriptor size wrong: %d > %d\n",
 805                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 806                 RETURN(-EINVAL);
 807         }
 808
 809         if (desc->ld_magic != LOV_DESC_MAGIC) {
 810                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 811                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 812                                    obd->obd_name, desc);
 813                             lustre_swab_lov_desc(desc);
 814                 } else {
 815                         CERROR("%s: Bad lov desc magic: %#x\n",
 816                                obd->obd_name, desc->ld_magic);
 817                         RETURN(-EINVAL);
 818                 }
 819         }
 820
 821         lov_fix_desc(desc);
 822
 823         desc->ld_active_tgt_count = 0;
 824         lov->desc = *desc;
 825         lov->lov_tgt_size = 0;
 826
 827         mutex_init(&lov->lov_lock);
 828         atomic_set(&lov->lov_refcount, 0);
 829         lov->lov_sp_me = LUSTRE_SP_CLI;
 830
 831         init_rwsem(&lov->lov_notify_lock);
 832
 833         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 834                                                    HASH_POOLS_MAX_BITS,
 835                                                    HASH_POOLS_BKT_BITS, 0,
 836                                                    CFS_HASH_MIN_THETA,
 837                                                    CFS_HASH_MAX_THETA,
 838                                                    &pool_hash_operations,
 839                                                    CFS_HASH_DEFAULT);
 840         INIT_LIST_HEAD(&lov->lov_pool_list);
 841         lov->lov_pool_count = 0;
 842         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 843         if (rc)
 844                 GOTO(out, rc);
 845
 846 #ifdef LPROCFS
 847         obd->obd_vars = lprocfs_lov_obd_vars;
 848         /* If this is true then both client (lov) and server
 849          * (lod) are on the same node. The lod layer if loaded
 850          * first will register the lov proc directory. In that
 851          * case obd->obd_type->typ_procroot will be not set.
 852          * Instead we use type->typ_procsym as the parent. */
 853         type = class_search_type(LUSTRE_LOD_NAME);
 854         if (type != NULL && type->typ_procsym != NULL) {
 855                 obd->obd_proc_entry = lprocfs_seq_register(obd->obd_name,
 856                                                            type->typ_procsym,
 857                                                            obd->obd_vars, obd);
 858                 if (IS_ERR(obd->obd_proc_entry)) {
 859                         rc = PTR_ERR(obd->obd_proc_entry);
 860                         CERROR("error %d setting up lprocfs for %s\n", rc,
 861                                obd->obd_name);
 862                         obd->obd_proc_entry = NULL;
 863                 }
 864         } else {
 865                 rc = lprocfs_seq_obd_setup(obd);
 866         }
 867
 868         if (rc == 0) {
 869                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
 870                                         0444, &lov_proc_target_fops, obd);
 871                 if (rc)
 872                         CWARN("Error adding the target_obd file\n");
 873
 874                 lov->lov_pool_proc_entry = lprocfs_seq_register("pools",
 875                                                         obd->obd_proc_entry,
 876                                                         NULL, NULL);
 877                 if (IS_ERR(lov->lov_pool_proc_entry)) {
 878                         rc = PTR_ERR(lov->lov_pool_proc_entry);
 879                         CERROR("error %d setting up lprocfs for pools\n", rc);
 880                         lov->lov_pool_proc_entry = NULL;
 881                 }
 882         }
 883 #endif
 884         RETURN(0);
 885
 886 out:
 887         return rc;
 888 }
 889
 890 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 891 {
 892         int rc = 0;
 893         struct lov_obd *lov = &obd->u.lov;
 894
 895         ENTRY;
 896
 897         switch (stage) {
 898         case OBD_CLEANUP_EARLY: {
 899                 int i;
 900                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 901                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 902                                 continue;
 903                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 904                                        OBD_CLEANUP_EARLY);
 905                 }
 906                 break;
 907         }
 908         default:
 909                 break;
 910         }
 911
 912         RETURN(rc);
 913 }
 914
 915 static int lov_cleanup(struct obd_device *obd)
 916 {
 917         struct lov_obd *lov = &obd->u.lov;
 918         struct list_head *pos, *tmp;
 919         struct pool_desc *pool;
 920         ENTRY;
 921
 922         list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 923                 pool = list_entry(pos, struct pool_desc, pool_list);
 924                 /* free pool structs */
 925                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 926                 /* In the function below, .hs_keycmp resolves to
 927                  * pool_hashkey_keycmp() */
 928                 /* coverity[overrun-buffer-val] */
 929                 lov_pool_del(obd, pool->pool_name);
 930         }
 931         cfs_hash_putref(lov->lov_pools_hash_body);
 932         lov_ost_pool_free(&lov->lov_packed);
 933
 934         lprocfs_obd_cleanup(obd);
 935         if (lov->lov_tgts) {
 936                 int i;
 937                 obd_getref(obd);
 938                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 939                         if (!lov->lov_tgts[i])
 940                                 continue;
 941
 942                         /* Inactive targets may never have connected */
 943                         if (lov->lov_tgts[i]->ltd_active ||
 944                             atomic_read(&lov->lov_refcount))
 945                                 /* We should never get here - these
 946                                  * should have been removed in the
 947                                  * disconnect. */
 948                                 CERROR("%s: lov tgt %d not cleaned! "
 949                                        "deathrow=%d, lovrc=%d\n",
 950                                        obd->obd_name, i, lov->lov_death_row,
 951                                        atomic_read(&lov->lov_refcount));
 952                         lov_del_target(obd, i, 0, 0);
 953                 }
 954                 obd_putref(obd);
 955                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 956                          lov->lov_tgt_size);
 957                 lov->lov_tgt_size = 0;
 958         }
 959         RETURN(0);
 960 }
 961
 962 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 963                             __u32 *indexp, int *genp)
 964 {
 965         struct obd_uuid obd_uuid;
 966         int cmd;
 967         int rc = 0;
 968         ENTRY;
 969
 970         switch(cmd = lcfg->lcfg_command) {
 971         case LCFG_LOV_ADD_OBD:
 972         case LCFG_LOV_ADD_INA:
 973         case LCFG_LOV_DEL_OBD: {
 974                 __u32 index;
 975                 int gen;
 976                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 977                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 978                         GOTO(out, rc = -EINVAL);
 979
 980                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 981
 982                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%u", indexp) != 1)
 983                         GOTO(out, rc = -EINVAL);
 984                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
 985                         GOTO(out, rc = -EINVAL);
 986                 index = *indexp;
 987                 gen = *genp;
 988                 if (cmd == LCFG_LOV_ADD_OBD)
 989                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 990                 else if (cmd == LCFG_LOV_ADD_INA)
 991                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 992                 else
 993                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 994                 GOTO(out, rc);
 995         }
 996         case LCFG_PARAM: {
 997                 struct lov_desc *desc = &(obd->u.lov.desc);
 998
 999                 if (!desc)
1000                         GOTO(out, rc = -EINVAL);
1001
1002                 rc = class_process_proc_seq_param(PARAM_LOV, obd->obd_vars,
1003                                                   lcfg, obd);
1004                 if (rc > 0)
1005                         rc = 0;
1006                 GOTO(out, rc);
1007         }
1008         case LCFG_POOL_NEW:
1009         case LCFG_POOL_ADD:
1010         case LCFG_POOL_DEL:
1011         case LCFG_POOL_REM:
1012                 GOTO(out, rc);
1013
1014         default: {
1015                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1016                 GOTO(out, rc = -EINVAL);
1017
1018         }
1019         }
1020 out:
1021         RETURN(rc);
1022 }
1023
1024 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
1025                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
1026 {
1027         struct lov_stripe_md *obj_mdp, *lsm;
1028         struct lov_obd *lov = &exp->exp_obd->u.lov;
1029         unsigned ost_idx;
1030         int rc, i;
1031         ENTRY;
1032
1033         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1034                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1035
1036         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1037         if (obj_mdp == NULL)
1038                 RETURN(-ENOMEM);
1039
1040         ost_idx = src_oa->o_nlink;
1041         lsm = *ea;
1042         if (lsm == NULL)
1043                 GOTO(out, rc = -EINVAL);
1044         if (ost_idx >= lov->desc.ld_tgt_count ||
1045             !lov->lov_tgts[ost_idx])
1046                 GOTO(out, rc = -EINVAL);
1047
1048         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1049                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1050
1051                 if (lov_oinfo_is_dummy(loi))
1052                         continue;
1053
1054                 if (loi->loi_ost_idx == ost_idx) {
1055                         if (ostid_id(&loi->loi_oi) !=
1056                                         ostid_id(&src_oa->o_oi))
1057                                 GOTO(out, rc = -EINVAL);
1058                         break;
1059                 }
1060         }
1061         if (i == lsm->lsm_stripe_count)
1062                 GOTO(out, rc = -EINVAL);
1063
1064         rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp,
1065                         src_oa, &obj_mdp, oti);
1066 out:
1067         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1068         RETURN(rc);
1069 }
1070
1071 /* the LOV expects oa->o_id to be set to the LOV object id */
1072 static int lov_create(const struct lu_env *env, struct obd_export *exp,
1073                       struct obdo *src_oa, struct lov_stripe_md **ea,
1074                       struct obd_trans_info *oti)
1075 {
1076         struct lov_obd *lov;
1077         int rc = 0;
1078         ENTRY;
1079
1080         LASSERT(ea != NULL);
1081         if (exp == NULL)
1082                 RETURN(-EINVAL);
1083
1084         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1085             src_oa->o_flags == OBD_FL_DELORPHAN) {
1086                 /* should be used with LOV anymore */
1087                 LBUG();
1088         }
1089
1090         lov = &exp->exp_obd->u.lov;
1091         if (!lov->desc.ld_active_tgt_count)
1092                 RETURN(-EIO);
1093
1094         obd_getref(exp->exp_obd);
1095         /* Recreate a specific object id at the given OST index */
1096         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1097             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1098                  rc = lov_recreate(exp, src_oa, ea, oti);
1099         }
1100
1101         obd_putref(exp->exp_obd);
1102         RETURN(rc);
1103 }
1104
1105 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1106 do {                                                                            \
1107         LASSERT((lsmp) != NULL);                                                \
1108         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                          \
1109                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                            \
1110                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);              \
1111 } while (0)
1112
1113 static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
1114                        struct obdo *oa, struct lov_stripe_md *lsm,
1115                        struct obd_trans_info *oti, struct obd_export *md_exp,
1116                        void *capa)
1117 {
1118         struct lov_request_set *set;
1119         struct obd_info oinfo;
1120         struct lov_request *req;
1121         struct list_head *pos;
1122         struct lov_obd *lov;
1123         int rc = 0, err = 0;
1124         ENTRY;
1125
1126         ASSERT_LSM_MAGIC(lsm);
1127
1128         if (!exp || !exp->exp_obd)
1129                 RETURN(-ENODEV);
1130
1131         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1132                 LASSERT(oti);
1133                 LASSERT(oti->oti_logcookies);
1134         }
1135
1136         lov = &exp->exp_obd->u.lov;
1137         obd_getref(exp->exp_obd);
1138         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1139         if (rc)
1140                 GOTO(out, rc);
1141
1142         list_for_each(pos, &set->set_list) {
1143                 req = list_entry(pos, struct lov_request, rq_link);
1144
1145                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1146                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1147
1148                 err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1149                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1150                 err = lov_update_common_set(set, req, err);
1151                 if (err) {
1152                         CERROR("%s: destroying objid "DOSTID" subobj "
1153                                DOSTID" on OST idx %d: rc = %d\n",
1154                                exp->exp_obd->obd_name, POSTID(&oa->o_oi),
1155                                POSTID(&req->rq_oi.oi_oa->o_oi),
1156                                req->rq_idx, err);
1157                         if (!rc)
1158                                 rc = err;
1159                 }
1160         }
1161
1162         if (rc == 0) {
1163                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1164                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1165         }
1166         err = lov_fini_destroy_set(set);
1167 out:
1168         obd_putref(exp->exp_obd);
1169         RETURN(rc ? rc : err);
1170 }
1171
1172 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1173                                  void *data, int rc)
1174 {
1175         struct lov_request_set *lovset = (struct lov_request_set *)data;
1176         int err;
1177         ENTRY;
1178
1179         /* don't do attribute merge if this aysnc op failed */
1180         if (rc)
1181                 atomic_set(&lovset->set_completes, 0);
1182         err = lov_fini_getattr_set(lovset);
1183         RETURN(rc ? rc : err);
1184 }
1185
1186 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1187                               struct ptlrpc_request_set *rqset)
1188 {
1189         struct lov_request_set *lovset;
1190         struct lov_obd *lov;
1191         struct list_head *pos;
1192         struct lov_request *req;
1193         int rc = 0, err;
1194         ENTRY;
1195
1196         LASSERT(oinfo);
1197         ASSERT_LSM_MAGIC(oinfo->oi_md);
1198
1199         if (!exp || !exp->exp_obd)
1200                 RETURN(-ENODEV);
1201
1202         lov = &exp->exp_obd->u.lov;
1203
1204         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1205         if (rc)
1206                 RETURN(rc);
1207
1208         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1209                POSTID(&oinfo->oi_md->lsm_oi), oinfo->oi_md->lsm_stripe_count,
1210                oinfo->oi_md->lsm_stripe_size);
1211
1212         list_for_each(pos, &lovset->set_list) {
1213                 req = list_entry(pos, struct lov_request, rq_link);
1214
1215                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1216                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1217                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1218                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1219                                        &req->rq_oi, rqset);
1220                 if (rc) {
1221                         CERROR("%s: getattr objid "DOSTID" subobj"
1222                                DOSTID" on OST idx %d: rc = %d\n",
1223                                exp->exp_obd->obd_name,
1224                                POSTID(&oinfo->oi_oa->o_oi),
1225                                POSTID(&req->rq_oi.oi_oa->o_oi),
1226                                req->rq_idx, rc);
1227                         GOTO(out, rc);
1228                 }
1229         }
1230
1231         if (!list_empty(&rqset->set_requests)) {
1232                 LASSERT(rc == 0);
1233                 LASSERT (rqset->set_interpret == NULL);
1234                 rqset->set_interpret = lov_getattr_interpret;
1235                 rqset->set_arg = (void *)lovset;
1236                 RETURN(rc);
1237         }
1238 out:
1239         if (rc)
1240                 atomic_set(&lovset->set_completes, 0);
1241         err = lov_fini_getattr_set(lovset);
1242         RETURN(rc ? rc : err);
1243 }
1244
1245 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1246                                  void *data, int rc)
1247 {
1248         struct lov_request_set *lovset = (struct lov_request_set *)data;
1249         int err;
1250         ENTRY;
1251
1252         if (rc)
1253                 atomic_set(&lovset->set_completes, 0);
1254         err = lov_fini_setattr_set(lovset);
1255         RETURN(rc ? rc : err);
1256 }
1257
1258 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1259    needed. Otherwise, a client is waiting for responses. */
1260 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1261                              struct obd_trans_info *oti,
1262                              struct ptlrpc_request_set *rqset)
1263 {
1264         struct lov_request_set *set;
1265         struct lov_request *req;
1266         struct list_head *pos;
1267         struct lov_obd *lov;
1268         int rc = 0;
1269         ENTRY;
1270
1271         LASSERT(oinfo);
1272         ASSERT_LSM_MAGIC(oinfo->oi_md);
1273         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1274                 LASSERT(oti);
1275                 LASSERT(oti->oti_logcookies);
1276         }
1277
1278         if (!exp || !exp->exp_obd)
1279                 RETURN(-ENODEV);
1280
1281         lov = &exp->exp_obd->u.lov;
1282         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1283         if (rc)
1284                 RETURN(rc);
1285
1286         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1287                POSTID(&oinfo->oi_md->lsm_oi),
1288                oinfo->oi_md->lsm_stripe_count,
1289                oinfo->oi_md->lsm_stripe_size);
1290
1291         list_for_each(pos, &set->set_list) {
1292                 req = list_entry(pos, struct lov_request, rq_link);
1293
1294                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1295                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1296
1297                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1298                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1299                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1300
1301                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1302                                        &req->rq_oi, oti, rqset);
1303                 if (rc) {
1304                         CERROR("error: setattr objid "DOSTID" subobj"
1305                                DOSTID" on OST idx %d: rc = %d\n",
1306                                POSTID(&set->set_oi->oi_oa->o_oi),
1307                                POSTID(&req->rq_oi.oi_oa->o_oi),
1308                                req->rq_idx, rc);
1309                         break;
1310                 }
1311         }
1312
1313         /* If we are not waiting for responses on async requests, return. */
1314         if (rc || !rqset || list_empty(&rqset->set_requests)) {
1315                 int err;
1316                 if (rc)
1317                         atomic_set(&set->set_completes, 0);
1318                 err = lov_fini_setattr_set(set);
1319                 RETURN(rc ? rc : err);
1320         }
1321
1322         LASSERT(rqset->set_interpret == NULL);
1323         rqset->set_interpret = lov_setattr_interpret;
1324         rqset->set_arg = (void *)set;
1325
1326         RETURN(0);
1327 }
1328
1329 static int lov_change_cbdata(struct obd_export *exp,
1330                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1331                              void *data)
1332 {
1333         struct lov_obd *lov;
1334         int rc = 0, i;
1335         ENTRY;
1336
1337         ASSERT_LSM_MAGIC(lsm);
1338
1339         if (!exp || !exp->exp_obd)
1340                 RETURN(-ENODEV);
1341
1342         lov = &exp->exp_obd->u.lov;
1343         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1344                 struct lov_stripe_md submd;
1345                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1346
1347                 if (lov_oinfo_is_dummy(loi))
1348                         continue;
1349
1350                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1351                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
1352                         continue;
1353                 }
1354
1355                 submd.lsm_oi = loi->loi_oi;
1356                 submd.lsm_stripe_count = 0;
1357                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1358                                        &submd, it, data);
1359         }
1360         RETURN(rc);
1361 }
1362
1363 /* find any ldlm lock of the inode in lov
1364  * return 0    not find
1365  *        1    find one
1366  *      < 0    error */
1367 static int lov_find_cbdata(struct obd_export *exp,
1368                            struct lov_stripe_md *lsm, ldlm_iterator_t it,
1369                            void *data)
1370 {
1371         struct lov_obd *lov;
1372         int rc = 0, i;
1373         ENTRY;
1374
1375         ASSERT_LSM_MAGIC(lsm);
1376
1377         if (!exp || !exp->exp_obd)
1378                 RETURN(-ENODEV);
1379
1380         lov = &exp->exp_obd->u.lov;
1381         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1382                 struct lov_stripe_md submd;
1383                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1384
1385                 if (lov_oinfo_is_dummy(loi))
1386                         continue;
1387
1388                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1389                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
1390                         continue;
1391                 }
1392
1393                 submd.lsm_oi = loi->loi_oi;
1394                 submd.lsm_stripe_count = 0;
1395                 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1396                                      &submd, it, data);
1397                 if (rc != 0)
1398                         RETURN(rc);
1399         }
1400         RETURN(rc);
1401 }
1402
1403 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1404 {
1405         struct lov_request_set *lovset = (struct lov_request_set *)data;
1406         int err;
1407         ENTRY;
1408
1409         if (rc)
1410                 atomic_set(&lovset->set_completes, 0);
1411
1412         err = lov_fini_statfs_set(lovset);
1413         RETURN(rc ? rc : err);
1414 }
1415
1416 static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
1417                             __u64 max_age, struct ptlrpc_request_set *rqset)
1418 {
1419         struct obd_device      *obd = class_exp2obd(exp);
1420         struct lov_request_set *set;
1421         struct lov_request *req;
1422         struct list_head *pos;
1423         struct lov_obd *lov;
1424         int rc = 0;
1425         ENTRY;
1426
1427         LASSERT(oinfo != NULL);
1428         LASSERT(oinfo->oi_osfs != NULL);
1429
1430         lov = &obd->u.lov;
1431         rc = lov_prep_statfs_set(obd, oinfo, &set);
1432         if (rc)
1433                 RETURN(rc);
1434
1435         list_for_each(pos, &set->set_list) {
1436                 req = list_entry(pos, struct lov_request, rq_link);
1437                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1438                                       &req->rq_oi, max_age, rqset);
1439                 if (rc)
1440                         break;
1441         }
1442
1443         if (rc || list_empty(&rqset->set_requests)) {
1444                 int err;
1445                 if (rc)
1446                         atomic_set(&set->set_completes, 0);
1447                 err = lov_fini_statfs_set(set);
1448                 RETURN(rc ? rc : err);
1449         }
1450
1451         LASSERT(rqset->set_interpret == NULL);
1452         rqset->set_interpret = lov_statfs_interpret;
1453         rqset->set_arg = (void *)set;
1454         RETURN(0);
1455 }
1456
1457 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
1458                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1459 {
1460         struct ptlrpc_request_set *set = NULL;
1461         struct obd_info oinfo = { { { 0 } } };
1462         int rc = 0;
1463         ENTRY;
1464
1465
1466         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1467          * statfs requests */
1468         set = ptlrpc_prep_set();
1469         if (set == NULL)
1470                 RETURN(-ENOMEM);
1471
1472         oinfo.oi_osfs = osfs;
1473         oinfo.oi_flags = flags;
1474         rc = lov_statfs_async(exp, &oinfo, max_age, set);
1475         if (rc == 0)
1476                 rc = ptlrpc_set_wait(set);
1477         ptlrpc_set_destroy(set);
1478
1479         RETURN(rc);
1480 }
1481
1482 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1483                          void *karg, void *uarg)
1484 {
1485         struct obd_device *obddev = class_exp2obd(exp);
1486         struct lov_obd *lov = &obddev->u.lov;
1487         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1488         struct obd_uuid *uuidp;
1489         ENTRY;
1490
1491         switch (cmd) {
1492         case IOC_OBD_STATFS: {
1493                 struct obd_ioctl_data *data = karg;
1494                 struct obd_device *osc_obd;
1495                 struct obd_statfs stat_buf = {0};
1496                 __u32 index;
1497                 __u32 flags;
1498
1499                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1500                 if ((index >= count))
1501                         RETURN(-ENODEV);
1502
1503                 if (!lov->lov_tgts[index])
1504                         /* Try again with the next index */
1505                         RETURN(-EAGAIN);
1506                 if (!lov->lov_tgts[index]->ltd_active)
1507                         RETURN(-ENODATA);
1508
1509                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1510                 if (!osc_obd)
1511                         RETURN(-EINVAL);
1512
1513                 /* copy UUID */
1514                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1515                                  min((int)data->ioc_plen2,
1516                                      (int)sizeof(struct obd_uuid))))
1517                         RETURN(-EFAULT);
1518
1519                 flags = uarg ? *(__u32*)uarg : 0;
1520                 /* got statfs data */
1521                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1522                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1523                                 flags);
1524                 if (rc)
1525                         RETURN(rc);
1526                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1527                                      min((int) data->ioc_plen1,
1528                                          (int) sizeof(stat_buf))))
1529                         RETURN(-EFAULT);
1530                 break;
1531         }
1532         case OBD_IOC_LOV_GET_CONFIG: {
1533                 struct obd_ioctl_data *data;
1534                 struct lov_desc *desc;
1535                 char *buf = NULL;
1536                 __u32 *genp;
1537
1538                 len = 0;
1539                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1540                         RETURN(-EINVAL);
1541
1542                 data = (struct obd_ioctl_data *)buf;
1543
1544                 if (sizeof(*desc) > data->ioc_inllen1) {
1545                         obd_ioctl_freedata(buf, len);
1546                         RETURN(-EINVAL);
1547                 }
1548
1549                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1550                         obd_ioctl_freedata(buf, len);
1551                         RETURN(-EINVAL);
1552                 }
1553
1554                 if (sizeof(__u32) * count > data->ioc_inllen3) {
1555                         obd_ioctl_freedata(buf, len);
1556                         RETURN(-EINVAL);
1557                 }
1558
1559                 desc = (struct lov_desc *)data->ioc_inlbuf1;
1560                 memcpy(desc, &(lov->desc), sizeof(*desc));
1561
1562                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1563                 genp = (__u32 *)data->ioc_inlbuf3;
1564                 /* the uuid will be empty for deleted OSTs */
1565                 for (i = 0; i < count; i++, uuidp++, genp++) {
1566                         if (!lov->lov_tgts[i])
1567                                 continue;
1568                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
1569                         *genp = lov->lov_tgts[i]->ltd_gen;
1570                 }
1571
1572                 if (copy_to_user((void *)uarg, buf, len))
1573                         rc = -EFAULT;
1574                 obd_ioctl_freedata(buf, len);
1575                 break;
1576         }
1577         case LL_IOC_LOV_GETSTRIPE:
1578                 rc = lov_getstripe(exp, karg, uarg);
1579                 break;
1580         case OBD_IOC_QUOTACTL: {
1581                 struct if_quotactl *qctl = karg;
1582                 struct lov_tgt_desc *tgt = NULL;
1583                 struct obd_quotactl *oqctl;
1584
1585                 if (qctl->qc_valid == QC_OSTIDX) {
1586                         if (count <= qctl->qc_idx)
1587                                 RETURN(-EINVAL);
1588
1589                         tgt = lov->lov_tgts[qctl->qc_idx];
1590                         if (!tgt || !tgt->ltd_exp)
1591                                 RETURN(-EINVAL);
1592                 } else if (qctl->qc_valid == QC_UUID) {
1593                         for (i = 0; i < count; i++) {
1594                                 tgt = lov->lov_tgts[i];
1595                                 if (!tgt ||
1596                                     !obd_uuid_equals(&tgt->ltd_uuid,
1597                                                      &qctl->obd_uuid))
1598                                         continue;
1599
1600                                 if (tgt->ltd_exp == NULL)
1601                                         RETURN(-EINVAL);
1602
1603                                 break;
1604                         }
1605                 } else {
1606                         RETURN(-EINVAL);
1607                 }
1608
1609                 if (i >= count)
1610                         RETURN(-EAGAIN);
1611
1612                 LASSERT(tgt && tgt->ltd_exp);
1613                 OBD_ALLOC_PTR(oqctl);
1614                 if (!oqctl)
1615                         RETURN(-ENOMEM);
1616
1617                 QCTL_COPY(oqctl, qctl);
1618                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1619                 if (rc == 0) {
1620                         QCTL_COPY(qctl, oqctl);
1621                         qctl->qc_valid = QC_OSTIDX;
1622                         qctl->obd_uuid = tgt->ltd_uuid;
1623                 }
1624                 OBD_FREE_PTR(oqctl);
1625                 break;
1626         }
1627         default: {
1628                 int set = 0;
1629
1630                 if (count == 0)
1631                         RETURN(-ENOTTY);
1632
1633                 for (i = 0; i < count; i++) {
1634                         int err;
1635                         struct obd_device *osc_obd;
1636
1637                         /* OST was disconnected */
1638                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1639                                 continue;
1640
1641                         /* ll_umount_begin() sets force flag but for lov, not
1642                          * osc. Let's pass it through */
1643                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1644                         osc_obd->obd_force = obddev->obd_force;
1645                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1646                                             len, karg, uarg);
1647                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
1648                                 RETURN(err);
1649                         } else if (err) {
1650                                 if (lov->lov_tgts[i]->ltd_active) {
1651                                         CDEBUG(err == -ENOTTY ?
1652                                                D_IOCTL : D_WARNING,
1653                                                "iocontrol OSC %s on OST "
1654                                                "idx %d cmd %x: err = %d\n",
1655                                                lov_uuid2str(lov, i),
1656                                                i, cmd, err);
1657                                         if (!rc)
1658                                                 rc = err;
1659                                 }
1660                         } else {
1661                                 set = 1;
1662                         }
1663                 }
1664                 if (!set && !rc)
1665                         rc = -EIO;
1666         }
1667         }
1668
1669         RETURN(rc);
1670 }
1671
1672 #define FIEMAP_BUFFER_SIZE 4096
1673
1674 /**
1675  * Non-zero fe_logical indicates that this is a continuation FIEMAP
1676  * call. The local end offset and the device are sent in the first
1677  * fm_extent. This function calculates the stripe number from the index.
1678  * This function returns a stripe_no on which mapping is to be restarted.
1679  *
1680  * This function returns fm_end_offset which is the in-OST offset at which
1681  * mapping should be restarted. If fm_end_offset=0 is returned then caller
1682  * will re-calculate proper offset in next stripe.
1683  * Note that the first extent is passed to lov_get_info via the value field.
1684  *
1685  * \param fiemap fiemap request header
1686  * \param lsm striping information for the file
1687  * \param fm_start logical start of mapping
1688  * \param fm_end logical end of mapping
1689  * \param start_stripe starting stripe will be returned in this
1690  */
1691 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
1692                                    struct lov_stripe_md *lsm, obd_size fm_start,
1693                                    obd_size fm_end, int *start_stripe)
1694 {
1695         obd_size local_end = fiemap->fm_extents[0].fe_logical;
1696         obd_off lun_start, lun_end;
1697         obd_size fm_end_offset;
1698         int stripe_no = -1, i;
1699
1700         if (fiemap->fm_extent_count == 0 ||
1701             fiemap->fm_extents[0].fe_logical == 0)
1702                 return 0;
1703
1704         /* Find out stripe_no from ost_index saved in the fe_device */
1705         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1706                 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
1707
1708                 if (lov_oinfo_is_dummy(oinfo))
1709                         continue;
1710
1711                 if (oinfo->loi_ost_idx == fiemap->fm_extents[0].fe_device) {
1712                         stripe_no = i;
1713                         break;
1714                 }
1715         }
1716
1717         if (stripe_no == -1)
1718                 return -EINVAL;
1719
1720         /* If we have finished mapping on previous device, shift logical
1721          * offset to start of next device */
1722         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
1723                                    &lun_start, &lun_end)) != 0 &&
1724                                    local_end < lun_end) {
1725                 fm_end_offset = local_end;
1726                 *start_stripe = stripe_no;
1727         } else {
1728                 /* This is a special value to indicate that caller should
1729                  * calculate offset in next stripe. */
1730                 fm_end_offset = 0;
1731                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
1732         }
1733
1734         return fm_end_offset;
1735 }
1736
1737 /**
1738  * We calculate on which OST the mapping will end. If the length of mapping
1739  * is greater than (stripe_size * stripe_count) then the last_stripe will
1740  * will be one just before start_stripe. Else we check if the mapping
1741  * intersects each OST and find last_stripe.
1742  * This function returns the last_stripe and also sets the stripe_count
1743  * over which the mapping is spread
1744  *
1745  * \param lsm striping information for the file
1746  * \param fm_start logical start of mapping
1747  * \param fm_end logical end of mapping
1748  * \param start_stripe starting stripe of the mapping
1749  * \param stripe_count the number of stripes across which to map is returned
1750  *
1751  * \retval last_stripe return the last stripe of the mapping
1752  */
1753 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
1754                             obd_size fm_end, int start_stripe,
1755                             int *stripe_count)
1756 {
1757         int last_stripe;
1758         obd_off obd_start, obd_end;
1759         int i, j;
1760
1761         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
1762                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
1763                                                               start_stripe - 1);
1764                 *stripe_count = lsm->lsm_stripe_count;
1765         } else {
1766                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
1767                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
1768                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
1769                                                    &obd_start, &obd_end)) == 0)
1770                                 break;
1771                 }
1772                 *stripe_count = j;
1773                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
1774         }
1775
1776         return last_stripe;
1777 }
1778
1779 /**
1780  * Set fe_device and copy extents from local buffer into main return buffer.
1781  *
1782  * \param fiemap fiemap request header
1783  * \param lcl_fm_ext array of local fiemap extents to be copied
1784  * \param ost_index OST index to be written into the fm_device field for each
1785                     extent
1786  * \param ext_count number of extents to be copied
1787  * \param current_extent where to start copying in main extent array
1788  */
1789 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
1790                                   struct ll_fiemap_extent *lcl_fm_ext,
1791                                   int ost_index, unsigned int ext_count,
1792                                   int current_extent)
1793 {
1794         char *to;
1795         int ext;
1796
1797         for (ext = 0; ext < ext_count; ext++) {
1798                 lcl_fm_ext[ext].fe_device = ost_index;
1799                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
1800         }
1801
1802         /* Copy fm_extent's from fm_local to return buffer */
1803         to = (char *)fiemap + fiemap_count_to_size(current_extent);
1804         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
1805 }
1806
1807 /**
1808  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
1809  * This also handles the restarting of FIEMAP calls in case mapping overflows
1810  * the available number of extents in single call.
1811  */
1812 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
1813                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
1814 {
1815         struct ll_fiemap_info_key *fm_key = key;
1816         struct ll_user_fiemap *fiemap = val;
1817         struct ll_user_fiemap *fm_local = NULL;
1818         struct ll_fiemap_extent *lcl_fm_ext;
1819         int count_local;
1820         unsigned int get_num_extents = 0;
1821         int ost_index = 0, actual_start_stripe, start_stripe;
1822         obd_size fm_start, fm_end, fm_length, fm_end_offset;
1823         obd_size curr_loc;
1824         int current_extent = 0, rc = 0, i;
1825         int ost_eof = 0; /* EOF for object */
1826         int ost_done = 0; /* done with required mapping for this OST? */
1827         int last_stripe;
1828         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
1829         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
1830
1831         if (!lsm_has_objects(lsm)) {
1832                 if (lsm && lsm_is_released(lsm) && (fm_key->fiemap.fm_start <
1833                     fm_key->oa.o_size)) {
1834                         /* released file, return a minimal FIEMAP if
1835                          * request fits in file-size.
1836                          */
1837                         fiemap->fm_mapped_extents = 1;
1838                         fiemap->fm_extents[0].fe_logical =
1839                                                 fm_key->fiemap.fm_start;
1840                         if (fm_key->fiemap.fm_start + fm_key->fiemap.fm_length <
1841                             fm_key->oa.o_size)
1842                                 fiemap->fm_extents[0].fe_length =
1843                                                 fm_key->fiemap.fm_length;
1844                         else
1845                                 fiemap->fm_extents[0].fe_length =
1846                                                 fm_key->oa.o_size -
1847                                                 fm_key->fiemap.fm_start;
1848                         fiemap->fm_extents[0].fe_flags |=
1849                                                 (FIEMAP_EXTENT_UNKNOWN |
1850                                                  FIEMAP_EXTENT_LAST);
1851                 }
1852                 GOTO(out, rc = 0);
1853         }
1854
1855         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
1856                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
1857
1858         OBD_ALLOC_LARGE(fm_local, buffer_size);
1859         if (fm_local == NULL)
1860                 GOTO(out, rc = -ENOMEM);
1861         lcl_fm_ext = &fm_local->fm_extents[0];
1862
1863         count_local = fiemap_size_to_count(buffer_size);
1864
1865         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
1866         fm_start = fiemap->fm_start;
1867         fm_length = fiemap->fm_length;
1868         /* Calculate start stripe, last stripe and length of mapping */
1869         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
1870         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
1871                                                 fm_start + fm_length - 1);
1872         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
1873         if (fm_end > fm_key->oa.o_size)
1874                 fm_end = fm_key->oa.o_size;
1875
1876         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
1877                                             actual_start_stripe, &stripe_count);
1878
1879         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start,
1880                                                   fm_end, &start_stripe);
1881         if (fm_end_offset == -EINVAL)
1882                 GOTO(out, rc = -EINVAL);
1883
1884         if (fiemap_count_to_size(fiemap->fm_extent_count) > *vallen)
1885                 fiemap->fm_extent_count = fiemap_size_to_count(*vallen);
1886         if (fiemap->fm_extent_count == 0) {
1887                 get_num_extents = 1;
1888                 count_local = 0;
1889         }
1890         /* Check each stripe */
1891         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
1892              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
1893                 obd_size req_fm_len; /* Stores length of required mapping */
1894                 obd_size len_mapped_single_call;
1895                 obd_off lun_start, lun_end, obd_object_end;
1896                 unsigned int ext_count;
1897
1898                 cur_stripe_wrap = cur_stripe;
1899
1900                 /* Find out range of mapping on this stripe */
1901                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
1902                                            &lun_start, &obd_object_end)) == 0)
1903                         continue;
1904
1905                 if (lov_oinfo_is_dummy(lsm->lsm_oinfo[cur_stripe]))
1906                         GOTO(out, rc = -EIO);
1907
1908                 /* If this is a continuation FIEMAP call and we are on
1909                  * starting stripe then lun_start needs to be set to
1910                  * fm_end_offset */
1911                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
1912                         lun_start = fm_end_offset;
1913
1914                 if (fm_length != ~0ULL) {
1915                         /* Handle fm_start + fm_length overflow */
1916                         if (fm_start + fm_length < fm_start)
1917                                 fm_length = ~0ULL - fm_start;
1918                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
1919                                                      cur_stripe);
1920                 } else {
1921                         lun_end = ~0ULL;
1922                 }
1923
1924                 if (lun_start == lun_end)
1925                         continue;
1926
1927                 req_fm_len = obd_object_end - lun_start;
1928                 fm_local->fm_length = 0;
1929                 len_mapped_single_call = 0;
1930
1931                 /* If the output buffer is very large and the objects have many
1932                  * extents we may need to loop on a single OST repeatedly */
1933                 ost_eof = 0;
1934                 ost_done = 0;
1935                 do {
1936                         if (get_num_extents == 0) {
1937                                 /* Don't get too many extents. */
1938                                 if (current_extent + count_local >
1939                                     fiemap->fm_extent_count)
1940                                         count_local = fiemap->fm_extent_count -
1941                                                                  current_extent;
1942                         }
1943
1944                         lun_start += len_mapped_single_call;
1945                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
1946                         req_fm_len = fm_local->fm_length;
1947                         fm_local->fm_extent_count = count_local;
1948                         fm_local->fm_mapped_extents = 0;
1949                         fm_local->fm_flags = fiemap->fm_flags;
1950
1951                         fm_key->oa.o_oi = lsm->lsm_oinfo[cur_stripe]->loi_oi;
1952                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
1953
1954                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
1955                                 GOTO(out, rc = -EINVAL);
1956
1957                         /* If OST is inactive, return extent with UNKNOWN flag */
1958                         if (!lov->lov_tgts[ost_index]->ltd_active) {
1959                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
1960                                 fm_local->fm_mapped_extents = 1;
1961
1962                                 lcl_fm_ext[0].fe_logical = lun_start;
1963                                 lcl_fm_ext[0].fe_length = obd_object_end -
1964                                                                       lun_start;
1965                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
1966
1967                                 goto inactive_tgt;
1968                         }
1969
1970                         fm_local->fm_start = lun_start;
1971                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
1972                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
1973                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
1974                         rc = obd_get_info(NULL,
1975                                           lov->lov_tgts[ost_index]->ltd_exp,
1976                                           keylen, key, vallen, fm_local, lsm);
1977                         if (rc != 0)
1978                                 GOTO(out, rc);
1979
1980 inactive_tgt:
1981                         ext_count = fm_local->fm_mapped_extents;
1982                         if (ext_count == 0) {
1983                                 ost_done = 1;
1984                                 /* If last stripe has hole at the end,
1985                                  * then we need to return */
1986                                 if (cur_stripe_wrap == last_stripe) {
1987                                         fiemap->fm_mapped_extents = 0;
1988                                         goto finish;
1989                                 }
1990                                 break;
1991                         }
1992
1993                         /* If we just need num of extents then go to next device */
1994                         if (get_num_extents) {
1995                                 current_extent += ext_count;
1996                                 break;
1997                         }
1998
1999                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2000                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2001
2002                         /* Have we finished mapping on this device? */
2003                         if (req_fm_len <= len_mapped_single_call)
2004                                 ost_done = 1;
2005
2006                         /* Clear the EXTENT_LAST flag which can be present on
2007                          * last extent */
2008                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2009                                 lcl_fm_ext[ext_count - 1].fe_flags &=
2010                                                             ~FIEMAP_EXTENT_LAST;
2011
2012                         curr_loc = lov_stripe_size(lsm,
2013                                            lcl_fm_ext[ext_count - 1].fe_logical+
2014                                            lcl_fm_ext[ext_count - 1].fe_length,
2015                                            cur_stripe);
2016                         if (curr_loc >= fm_key->oa.o_size)
2017                                 ost_eof = 1;
2018
2019                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2020                                                      ost_index, ext_count,
2021                                                      current_extent);
2022
2023                         current_extent += ext_count;
2024
2025                         /* Ran out of available extents? */
2026                         if (current_extent >= fiemap->fm_extent_count)
2027                                 goto finish;
2028                 } while (ost_done == 0 && ost_eof == 0);
2029
2030                 if (cur_stripe_wrap == last_stripe)
2031                         goto finish;
2032         }
2033
2034 finish:
2035         /* Indicate that we are returning device offsets unless file just has
2036          * single stripe */
2037         if (lsm->lsm_stripe_count > 1)
2038                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2039
2040         if (get_num_extents)
2041                 goto skip_last_device_calc;
2042
2043         /* Check if we have reached the last stripe and whether mapping for that
2044          * stripe is done. */
2045         if (cur_stripe_wrap == last_stripe) {
2046                 if (ost_done || ost_eof)
2047                         fiemap->fm_extents[current_extent - 1].fe_flags |=
2048                                                              FIEMAP_EXTENT_LAST;
2049         }
2050
2051 skip_last_device_calc:
2052         fiemap->fm_mapped_extents = current_extent;
2053
2054 out:
2055         if (fm_local)
2056                 OBD_FREE_LARGE(fm_local, buffer_size);
2057         return rc;
2058 }
2059
2060 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
2061                         __u32 keylen, void *key, __u32 *vallen, void *val,
2062                         struct lov_stripe_md *lsm)
2063 {
2064         struct obd_device *obddev = class_exp2obd(exp);
2065         struct lov_obd *lov = &obddev->u.lov;
2066         int i, rc;
2067         ENTRY;
2068
2069         if (!vallen || !val)
2070                 RETURN(-EFAULT);
2071
2072         obd_getref(obddev);
2073
2074         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2075                 struct {
2076                         char name[16];
2077                         struct ldlm_lock *lock;
2078                 } *data = key;
2079                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2080                 struct lov_oinfo *loi;
2081                 __u32 *stripe = val;
2082
2083                 if (*vallen < sizeof(*stripe))
2084                         GOTO(out, rc = -EFAULT);
2085                 *vallen = sizeof(*stripe);
2086
2087                 /* XXX This is another one of those bits that will need to
2088                  * change if we ever actually support nested LOVs.  It uses
2089                  * the lock's export to find out which stripe it is. */
2090                 /* XXX - it's assumed all the locks for deleted OSTs have
2091                  * been cancelled. Also, the export for deleted OSTs will
2092                  * be NULL and won't match the lock's export. */
2093                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2094                         loi = lsm->lsm_oinfo[i];
2095                         if (lov_oinfo_is_dummy(loi))
2096                                 continue;
2097
2098                         if (!lov->lov_tgts[loi->loi_ost_idx])
2099                                 continue;
2100                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2101                             data->lock->l_conn_export &&
2102                             ostid_res_name_eq(&loi->loi_oi, res_id)) {
2103                                 *stripe = i;
2104                                 GOTO(out, rc = 0);
2105                         }
2106                 }
2107                 LDLM_ERROR(data->lock, "lock on inode without such object");
2108                 dump_lsm(D_ERROR, lsm);
2109                 GOTO(out, rc = -ENXIO);
2110         } else if (KEY_IS(KEY_LAST_ID)) {
2111                 struct obd_id_info *info = val;
2112                 __u32 size = sizeof(obd_id);
2113                 struct lov_tgt_desc *tgt;
2114
2115                 LASSERT(*vallen == sizeof(struct obd_id_info));
2116                 tgt = lov->lov_tgts[info->idx];
2117
2118                 if (!tgt || !tgt->ltd_active)
2119                         GOTO(out, rc = -ESRCH);
2120
2121                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
2122                                   &size, info->data, NULL);
2123                 GOTO(out, rc = 0);
2124         } else if (KEY_IS(KEY_LOVDESC)) {
2125                 struct lov_desc *desc_ret = val;
2126                 *desc_ret = lov->desc;
2127
2128                 GOTO(out, rc = 0);
2129         } else if (KEY_IS(KEY_FIEMAP)) {
2130                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2131                 GOTO(out, rc);
2132         } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2133                 struct lov_tgt_desc *tgt;
2134                 __u64 ost_idx = *((__u64*)val);
2135
2136                 LASSERT(*vallen == sizeof(__u64));
2137                 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2138                 tgt = lov->lov_tgts[ost_idx];
2139
2140                 if (!tgt || !tgt->ltd_exp)
2141                         GOTO(out, rc = -ESRCH);
2142
2143                 *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp);
2144                 GOTO(out, rc = 0);
2145         } else if (KEY_IS(KEY_TGT_COUNT)) {
2146                 *((int *)val) = lov->desc.ld_tgt_count;
2147                 GOTO(out, rc = 0);
2148         }
2149
2150         rc = -EINVAL;
2151
2152 out:
2153         obd_putref(obddev);
2154         RETURN(rc);
2155 }
2156
2157 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
2158                               obd_count keylen, void *key, obd_count vallen,
2159                               void *val, struct ptlrpc_request_set *set)
2160 {
2161         struct obd_device *obddev = class_exp2obd(exp);
2162         struct lov_obd *lov = &obddev->u.lov;
2163         obd_count count;
2164         int i, rc = 0, err;
2165         struct lov_tgt_desc *tgt;
2166         unsigned incr, check_uuid,
2167                  do_inactive, no_set;
2168         unsigned next_id = 0,  mds_con = 0, capa = 0;
2169         ENTRY;
2170
2171         incr = check_uuid = do_inactive = no_set = 0;
2172         if (set == NULL) {
2173                 no_set = 1;
2174                 set = ptlrpc_prep_set();
2175                 if (!set)
2176                         RETURN(-ENOMEM);
2177         }
2178
2179         obd_getref(obddev);
2180         count = lov->desc.ld_tgt_count;
2181
2182         if (KEY_IS(KEY_NEXT_ID)) {
2183                 count = vallen / sizeof(struct obd_id_info);
2184                 vallen = sizeof(obd_id);
2185                 incr = sizeof(struct obd_id_info);
2186                 do_inactive = 1;
2187                 next_id = 1;
2188         } else if (KEY_IS(KEY_CHECKSUM)) {
2189                 do_inactive = 1;
2190         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2191                 /* use defaults:  do_inactive = incr = 0; */
2192         } else if (KEY_IS(KEY_MDS_CONN)) {
2193                 mds_con = 1;
2194         } else if (KEY_IS(KEY_CAPA_KEY)) {
2195                 capa = 1;
2196         } else if (KEY_IS(KEY_CACHE_SET)) {
2197                 LASSERT(lov->lov_cache == NULL);
2198                 lov->lov_cache = val;
2199                 do_inactive = 1;
2200         }
2201
2202         for (i = 0; i < count; i++, val = (char *)val + incr) {
2203                 if (next_id) {
2204                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2205                 } else {
2206                         tgt = lov->lov_tgts[i];
2207                 }
2208                 /* OST was disconnected */
2209                 if (!tgt || !tgt->ltd_exp)
2210                         continue;
2211
2212                 /* OST is inactive and we don't want inactive OSCs */
2213                 if (!tgt->ltd_active && !do_inactive)
2214                         continue;
2215
2216                 if (mds_con) {
2217                         struct mds_group_info *mgi;
2218
2219                         LASSERT(vallen == sizeof(*mgi));
2220                         mgi = (struct mds_group_info *)val;
2221
2222                         /* Only want a specific OSC */
2223                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2224                                                 &tgt->ltd_uuid))
2225                                 continue;
2226
2227                         err = obd_set_info_async(env, tgt->ltd_exp,
2228                                          keylen, key, sizeof(int),
2229                                          &mgi->group, set);
2230                 } else if (next_id) {
2231                         err = obd_set_info_async(env, tgt->ltd_exp,
2232                                          keylen, key, vallen,
2233                                          ((struct obd_id_info*)val)->data, set);
2234                 } else if (capa) {
2235                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2236
2237                         LASSERT(vallen == sizeof(*info));
2238
2239                          /* Only want a specific OSC */
2240                         if (info->uuid &&
2241                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2242                                 continue;
2243
2244                         err = obd_set_info_async(env, tgt->ltd_exp, keylen,
2245                                                  key, sizeof(*info->capa),
2246                                                  info->capa, set);
2247                 } else {
2248                         /* Only want a specific OSC */
2249                         if (check_uuid &&
2250                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2251                                 continue;
2252
2253                         err = obd_set_info_async(env, tgt->ltd_exp,
2254                                          keylen, key, vallen, val, set);
2255                 }
2256
2257                 if (!rc)
2258                         rc = err;
2259         }
2260
2261         obd_putref(obddev);
2262         if (no_set) {
2263                 err = ptlrpc_set_wait(set);
2264                 if (!rc)
2265                         rc = err;
2266                 ptlrpc_set_destroy(set);
2267         }
2268         RETURN(rc);
2269 }
2270
2271 void lov_stripe_lock(struct lov_stripe_md *md)
2272 {
2273         LASSERT(md->lsm_lock_owner != current_pid());
2274         spin_lock(&md->lsm_lock);
2275         LASSERT(md->lsm_lock_owner == 0);
2276         md->lsm_lock_owner = current_pid();
2277 }
2278
2279 void lov_stripe_unlock(struct lov_stripe_md *md)
2280 {
2281         LASSERT(md->lsm_lock_owner == current_pid());
2282         md->lsm_lock_owner = 0;
2283         spin_unlock(&md->lsm_lock);
2284 }
2285
2286 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
2287                         struct obd_quotactl *oqctl)
2288 {
2289         struct lov_obd      *lov = &obd->u.lov;
2290         struct lov_tgt_desc *tgt;
2291         __u64                curspace = 0;
2292         __u64                bhardlimit = 0;
2293         int                  i, rc = 0;
2294         ENTRY;
2295
2296         if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON &&
2297             oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF &&
2298             oqctl->qc_cmd != Q_GETOQUOTA &&
2299             oqctl->qc_cmd != Q_INITQUOTA &&
2300             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
2301             oqctl->qc_cmd != Q_FINVALIDATE) {
2302                 CERROR("%s: bad quota opc %x for lov obd\n",
2303                        obd->obd_name, oqctl->qc_cmd);
2304                 RETURN(-EFAULT);
2305         }
2306
2307         /* for lov tgt */
2308         obd_getref(obd);
2309         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2310                 int err;
2311
2312                 tgt = lov->lov_tgts[i];
2313
2314                 if (!tgt)
2315                         continue;
2316
2317                 if (!tgt->ltd_active || tgt->ltd_reap) {
2318                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
2319                             lov->lov_tgts[i]->ltd_activate) {
2320                                 rc = -ENETDOWN;
2321                                 CERROR("ost %d is inactive\n", i);
2322                         } else {
2323                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
2324                         }
2325                         continue;
2326                 }
2327
2328                 err = obd_quotactl(tgt->ltd_exp, oqctl);
2329                 if (err) {
2330                         if (tgt->ltd_active && !rc)
2331                                 rc = err;
2332                         continue;
2333                 }
2334
2335                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2336                         curspace += oqctl->qc_dqblk.dqb_curspace;
2337                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
2338                 }
2339         }
2340         obd_putref(obd);
2341
2342         if (oqctl->qc_cmd == Q_GETOQUOTA) {
2343                 oqctl->qc_dqblk.dqb_curspace = curspace;
2344                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
2345         }
2346         RETURN(rc);
2347 }
2348
2349 static int lov_quotacheck(struct obd_device *obd, struct obd_export *exp,
2350                           struct obd_quotactl *oqctl)
2351 {
2352         struct lov_obd *lov = &obd->u.lov;
2353         int             i, rc = 0;
2354         ENTRY;
2355
2356         obd_getref(obd);
2357
2358         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2359                 if (!lov->lov_tgts[i])
2360                         continue;
2361
2362                 /* Skip quota check on the administratively disabled OSTs. */
2363                 if (!lov->lov_tgts[i]->ltd_activate) {
2364                         CWARN("lov idx %d was administratively disabled, "
2365                               "skip quotacheck on it.\n", i);
2366                         continue;
2367                 }
2368
2369                 if (!lov->lov_tgts[i]->ltd_active) {
2370                         CERROR("lov idx %d inactive\n", i);
2371                         rc = -EIO;
2372                         goto out;
2373                 }
2374         }
2375
2376         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2377                 int err;
2378
2379                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate)
2380                         continue;
2381
2382                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
2383                 if (err && !rc)
2384                         rc = err;
2385         }
2386
2387 out:
2388         obd_putref(obd);
2389
2390         RETURN(rc);
2391 }
2392
2393 static struct obd_ops lov_obd_ops = {
2394         .o_owner                = THIS_MODULE,
2395         .o_setup                = lov_setup,
2396         .o_precleanup           = lov_precleanup,
2397         .o_cleanup              = lov_cleanup,
2398         .o_connect              = lov_connect,
2399         .o_disconnect           = lov_disconnect,
2400         .o_statfs               = lov_statfs,
2401         .o_statfs_async         = lov_statfs_async,
2402         .o_packmd               = lov_packmd,
2403         .o_unpackmd             = lov_unpackmd,
2404         .o_create               = lov_create,
2405         .o_destroy              = lov_destroy,
2406         .o_getattr_async        = lov_getattr_async,
2407         .o_setattr_async        = lov_setattr_async,
2408         .o_change_cbdata        = lov_change_cbdata,
2409         .o_find_cbdata          = lov_find_cbdata,
2410         .o_iocontrol            = lov_iocontrol,
2411         .o_get_info             = lov_get_info,
2412         .o_set_info_async       = lov_set_info_async,
2413         .o_notify               = lov_notify,
2414         .o_pool_new             = lov_pool_new,
2415         .o_pool_rem             = lov_pool_remove,
2416         .o_pool_add             = lov_pool_add,
2417         .o_pool_del             = lov_pool_del,
2418         .o_getref               = lov_getref,
2419         .o_putref               = lov_putref,
2420         .o_quotactl             = lov_quotactl,
2421         .o_quotacheck           = lov_quotacheck,
2422 };
2423
2424 struct kmem_cache *lov_oinfo_slab;
2425
2426 extern struct lu_kmem_descr lov_caches[];
2427
2428 int __init lov_init(void)
2429 {
2430         bool enable_proc = true;
2431         struct obd_type *type;
2432         int rc;
2433         ENTRY;
2434
2435         /* print an address of _any_ initialized kernel symbol from this
2436          * module, to allow debugging with gdb that doesn't support data
2437          * symbols from modules.*/
2438         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
2439
2440         rc = lu_kmem_init(lov_caches);
2441         if (rc)
2442                 return rc;
2443
2444         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
2445                                            sizeof(struct lov_oinfo), 0,
2446                                            SLAB_HWCACHE_ALIGN, NULL);
2447         if (lov_oinfo_slab == NULL) {
2448                 lu_kmem_fini(lov_caches);
2449                 return -ENOMEM;
2450         }
2451
2452         type = class_search_type(LUSTRE_LOD_NAME);
2453         if (type != NULL && type->typ_procsym != NULL)
2454                 enable_proc = false;
2455
2456         rc = class_register_type(&lov_obd_ops, NULL, enable_proc, NULL,
2457 #ifndef HAVE_ONLY_PROCFS_SEQ
2458                                  NULL,
2459 #endif
2460                                  LUSTRE_LOV_NAME, &lov_device_type);
2461
2462         if (rc) {
2463                 kmem_cache_destroy(lov_oinfo_slab);
2464                 lu_kmem_fini(lov_caches);
2465         }
2466
2467         RETURN(rc);
2468 }
2469
2470 #ifdef __KERNEL__
2471 static void /*__exit*/ lov_exit(void)
2472 {
2473         class_unregister_type(LUSTRE_LOV_NAME);
2474         kmem_cache_destroy(lov_oinfo_slab);
2475         lu_kmem_fini(lov_caches);
2476 }
2477
2478 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2479 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2480 MODULE_LICENSE("GPL");
2481
2482 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
2483 #endif