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_lib.h>
  53 #include <lustre_net.h>
  54 #include <lustre/lustre_idl.h>
  55 #include <lustre_dlm.h>
  56 #include <lustre_mds.h>
  57 #include <obd_class.h>
  58 #include <obd_ost.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         cfs_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 (cfs_atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  90                 CFS_LIST_HEAD(kill);
  91                 int i;
  92                 struct lov_tgt_desc *tgt, *n;
  93                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  94                        lov->lov_death_row);
  95                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  96                         tgt = lov->lov_tgts[i];
  97
  98                         if (!tgt || !tgt->ltd_reap)
  99                                 continue;
 100                         cfs_list_add(&tgt->ltd_kill, &kill);
 101                         /* XXX - right now there is a dependency on ld_tgt_count
 102                          * being the maximum tgt index for computing the
 103                          * mds_max_easize. So we can't shrink it. */
 104                         lov_ost_pool_remove(&lov->lov_packed, i);
 105                         lov->lov_tgts[i] = NULL;
 106                         lov->lov_death_row--;
 107                 }
 108                 mutex_unlock(&lov->lov_lock);
 109
 110                 cfs_list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 111                         cfs_list_del(&tgt->ltd_kill);
 112                         /* Disconnect */
 113                         __lov_del_obd(obd, tgt);
 114                 }
 115         } else {
 116                 mutex_unlock(&lov->lov_lock);
 117         }
 118 }
 119
 120 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 121                               enum obd_notify_event ev);
 122 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 123                       enum obd_notify_event ev, void *data);
 124
 125 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 126                     struct obd_connect_data *data)
 127 {
 128         struct lov_obd *lov = &obd->u.lov;
 129         struct obd_uuid *tgt_uuid;
 130         struct obd_device *tgt_obd;
 131         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 132         struct obd_import *imp;
 133 #ifdef __KERNEL__
 134         struct proc_dir_entry *lov_proc_dir;
 135 #endif
 136         int rc;
 137         ENTRY;
 138
 139         if (!lov->lov_tgts[index])
 140                 RETURN(-EINVAL);
 141
 142         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 143         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 144
 145         if (!tgt_obd->obd_set_up) {
 146                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 147                 RETURN(-EINVAL);
 148         }
 149
 150         /* override the sp_me from lov */
 151         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 152
 153         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 154                 data->ocd_index = index;
 155
 156         /*
 157          * Divine LOV knows that OBDs under it are OSCs.
 158          */
 159         imp = tgt_obd->u.cli.cl_import;
 160
 161         if (activate) {
 162                 tgt_obd->obd_no_recov = 0;
 163                 /* FIXME this is probably supposed to be
 164                    ptlrpc_set_import_active.  Horrible naming. */
 165                 ptlrpc_activate_import(imp);
 166         }
 167
 168         rc = obd_register_observer(tgt_obd, obd);
 169         if (rc) {
 170                 CERROR("Target %s register_observer error %d\n",
 171                        obd_uuid2str(tgt_uuid), rc);
 172                 RETURN(rc);
 173         }
 174
 175
 176         if (imp->imp_invalid) {
 177                 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
 178                        "disabled\n", obd_uuid2str(tgt_uuid));
 179                 RETURN(0);
 180         }
 181
 182         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 183                          &lov_osc_uuid, data, NULL);
 184         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 185                 CERROR("Target %s connect error %d\n",
 186                        obd_uuid2str(tgt_uuid), rc);
 187                 RETURN(-ENODEV);
 188         }
 189
 190         lov->lov_tgts[index]->ltd_reap = 0;
 191
 192         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 193                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 194
 195 #ifdef __KERNEL__
 196         lov_proc_dir = obd->obd_proc_private;
 197         if (lov_proc_dir) {
 198                 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
 199                 struct proc_dir_entry *osc_symlink;
 200
 201                 LASSERT(osc_obd != NULL);
 202                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
 203                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 204
 205                 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name,
 206                                                   lov_proc_dir,
 207                                                   "../../../%s/%s",
 208                                                   osc_obd->obd_type->typ_name,
 209                                                   osc_obd->obd_name);
 210                 if (osc_symlink == NULL) {
 211                         CERROR("could not register LOV target "
 212                                 "/proc/fs/lustre/%s/%s/target_obds/%s.",
 213                                 obd->obd_type->typ_name, obd->obd_name,
 214                                 osc_obd->obd_name);
 215                         lprocfs_remove(&lov_proc_dir);
 216                         obd->obd_proc_private = NULL;
 217                 }
 218         }
 219 #endif
 220
 221         RETURN(0);
 222 }
 223
 224 static int lov_connect(const struct lu_env *env,
 225                        struct obd_export **exp, struct obd_device *obd,
 226                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 227                        void *localdata)
 228 {
 229         struct lov_obd *lov = &obd->u.lov;
 230         struct lov_tgt_desc *tgt;
 231         struct lustre_handle conn;
 232         int i, rc;
 233         ENTRY;
 234
 235         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 236
 237         rc = class_connect(&conn, obd, cluuid);
 238         if (rc)
 239                 RETURN(rc);
 240
 241         *exp = class_conn2export(&conn);
 242
 243         /* Why should there ever be more than 1 connect? */
 244         lov->lov_connects++;
 245         LASSERT(lov->lov_connects == 1);
 246
 247         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 248         if (data)
 249                 lov->lov_ocd = *data;
 250
 251         obd_getref(obd);
 252         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 253                 tgt = lov->lov_tgts[i];
 254                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 255                         continue;
 256                 /* Flags will be lowest common denominator */
 257                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 258                 if (rc) {
 259                         CERROR("%s: lov connect tgt %d failed: %d\n",
 260                                obd->obd_name, i, rc);
 261                         continue;
 262                 }
 263                 /* connect to administrative disabled ost */
 264                 if (!lov->lov_tgts[i]->ltd_exp)
 265                         continue;
 266
 267                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 268                                 OBD_NOTIFY_CONNECT, (void *)&i);
 269                 if (rc) {
 270                         CERROR("%s error sending notify %d\n",
 271                                obd->obd_name, rc);
 272                 }
 273         }
 274         obd_putref(obd);
 275
 276         RETURN(0);
 277 }
 278
 279 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 280 {
 281         struct proc_dir_entry *lov_proc_dir;
 282         struct lov_obd *lov = &obd->u.lov;
 283         struct obd_device *osc_obd;
 284         int rc;
 285         ENTRY;
 286
 287         osc_obd = class_exp2obd(tgt->ltd_exp);
 288         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 289                obd->obd_name, osc_obd->obd_name);
 290
 291         if (tgt->ltd_active) {
 292                 tgt->ltd_active = 0;
 293                 lov->desc.ld_active_tgt_count--;
 294                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 295         }
 296
 297         lov_proc_dir = obd->obd_proc_private;
 298         if (lov_proc_dir)
 299                 lprocfs_remove_proc_entry(osc_obd->obd_name, lov_proc_dir);
 300
 301         if (osc_obd) {
 302                 /* Pass it on to our clients.
 303                  * XXX This should be an argument to disconnect,
 304                  * XXX not a back-door flag on the OBD.  Ah well.
 305                  */
 306                 osc_obd->obd_force = obd->obd_force;
 307                 osc_obd->obd_fail = obd->obd_fail;
 308                 osc_obd->obd_no_recov = obd->obd_no_recov;
 309         }
 310
 311         obd_register_observer(osc_obd, NULL);
 312
 313         rc = obd_disconnect(tgt->ltd_exp);
 314         if (rc) {
 315                 CERROR("Target %s disconnect error %d\n",
 316                        tgt->ltd_uuid.uuid, rc);
 317                 rc = 0;
 318         }
 319
 320         tgt->ltd_exp = NULL;
 321         RETURN(0);
 322 }
 323
 324 static int lov_disconnect(struct obd_export *exp)
 325 {
 326         struct obd_device *obd = class_exp2obd(exp);
 327         struct lov_obd *lov = &obd->u.lov;
 328         int i, rc;
 329         ENTRY;
 330
 331         if (!lov->lov_tgts)
 332                 goto out;
 333
 334         /* Only disconnect the underlying layers on the final disconnect. */
 335         lov->lov_connects--;
 336         if (lov->lov_connects != 0) {
 337                 /* why should there be more than 1 connect? */
 338                 CERROR("disconnect #%d\n", lov->lov_connects);
 339                 goto out;
 340         }
 341
 342         /* Let's hold another reference so lov_del_obd doesn't spin through
 343            putref every time */
 344         obd_getref(obd);
 345
 346         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 347                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 348                         /* Disconnection is the last we know about an obd */
 349                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
 350                 }
 351         }
 352         obd_putref(obd);
 353
 354 out:
 355         rc = class_disconnect(exp); /* bz 9811 */
 356         RETURN(rc);
 357 }
 358
 359 /* Error codes:
 360  *
 361  *  -EINVAL  : UUID can't be found in the LOV's target list
 362  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 363  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 364  *  any >= 0 : is log target index
 365  */
 366 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 367                               enum obd_notify_event ev)
 368 {
 369         struct lov_obd *lov = &obd->u.lov;
 370         struct lov_tgt_desc *tgt;
 371         int index, activate, active;
 372         ENTRY;
 373
 374         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 375                lov, uuid->uuid, ev);
 376
 377         obd_getref(obd);
 378         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 379                 tgt = lov->lov_tgts[index];
 380                 if (!tgt)
 381                         continue;
 382                 /*
 383                  * LU-642, initially inactive OSC could miss the obd_connect,
 384                  * we make up for it here.
 385                  */
 386                 if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
 387                     obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 388                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 389
 390                         obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 391                                     &lov_osc_uuid, &lov->lov_ocd, NULL);
 392                 }
 393                 if (!tgt->ltd_exp)
 394                         continue;
 395
 396                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 397                        index, obd_uuid2str(&tgt->ltd_uuid),
 398                        tgt->ltd_exp->exp_handle.h_cookie);
 399                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 400                         break;
 401         }
 402
 403         if (index == lov->desc.ld_tgt_count)
 404                 GOTO(out, index = -EINVAL);
 405
 406         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 407                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 408
 409                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 410                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 411                                uuid->uuid, activate ? "" : "de");
 412                 } else {
 413                         lov->lov_tgts[index]->ltd_activate = activate;
 414                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 415                                activate ? "" : "de", obd_uuid2str(uuid));
 416                 }
 417
 418         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 419                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 420
 421                 if (lov->lov_tgts[index]->ltd_active == active) {
 422                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 423                                uuid->uuid, active ? "" : "in");
 424                         GOTO(out, index);
 425                 } else {
 426                         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 427                                obd_uuid2str(uuid), active ? "" : "in");
 428                 }
 429
 430                 lov->lov_tgts[index]->ltd_active = active;
 431                 if (active) {
 432                         lov->desc.ld_active_tgt_count++;
 433                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 434                 } else {
 435                         lov->desc.ld_active_tgt_count--;
 436                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 437                 }
 438         } else {
 439                 CERROR("Unknown event(%d) for uuid %s", ev, uuid->uuid);
 440         }
 441
 442  out:
 443         obd_putref(obd);
 444         RETURN(index);
 445 }
 446
 447 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 448                       enum obd_notify_event ev, void *data)
 449 {
 450         int rc = 0;
 451         struct lov_obd *lov = &obd->u.lov;
 452         ENTRY;
 453
 454         down_read(&lov->lov_notify_lock);
 455         if (!lov->lov_connects) {
 456                 up_read(&lov->lov_notify_lock);
 457                 RETURN(rc);
 458         }
 459
 460         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 461             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 462                 struct obd_uuid *uuid;
 463
 464                 LASSERT(watched);
 465
 466                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 467                         up_read(&lov->lov_notify_lock);
 468                         CERROR("unexpected notification of %s %s!\n",
 469                                watched->obd_type->typ_name,
 470                                watched->obd_name);
 471                         RETURN(-EINVAL);
 472                 }
 473                 uuid = &watched->u.cli.cl_target_uuid;
 474
 475                 /* Set OSC as active before notifying the observer, so the
 476                  * observer can use the OSC normally.
 477                  */
 478                 rc = lov_set_osc_active(obd, uuid, ev);
 479                 if (rc < 0) {
 480                         up_read(&lov->lov_notify_lock);
 481                         CERROR("event(%d) of %s failed: %d\n", ev,
 482                                obd_uuid2str(uuid), rc);
 483                         RETURN(rc);
 484                 }
 485                 /* active event should be pass lov target index as data */
 486                 data = &rc;
 487         }
 488
 489         /* Pass the notification up the chain. */
 490         if (watched) {
 491                 rc = obd_notify_observer(obd, watched, ev, data);
 492         } else {
 493                 /* NULL watched means all osc's in the lov (only for syncs) */
 494                 /* sync event should be send lov idx as data */
 495                 struct lov_obd *lov = &obd->u.lov;
 496                 int i, is_sync;
 497
 498                 data = &i;
 499                 is_sync = (ev == OBD_NOTIFY_SYNC) ||
 500                           (ev == OBD_NOTIFY_SYNC_NONBLOCK);
 501
 502                 obd_getref(obd);
 503                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 504                         if (!lov->lov_tgts[i])
 505                                 continue;
 506
 507                         /* don't send sync event if target not
 508                          * connected/activated */
 509                         if (is_sync &&  !lov->lov_tgts[i]->ltd_active)
 510                                 continue;
 511
 512                         rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
 513                                                  ev, data);
 514                         if (rc) {
 515                                 CERROR("%s: notify %s of %s failed %d\n",
 516                                        obd->obd_name,
 517                                        obd->obd_observer->obd_name,
 518                                        lov->lov_tgts[i]->ltd_obd->obd_name,
 519                                        rc);
 520                         }
 521                 }
 522                 obd_putref(obd);
 523         }
 524
 525         up_read(&lov->lov_notify_lock);
 526         RETURN(rc);
 527 }
 528
 529 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 530                           __u32 index, int gen, int active)
 531 {
 532         struct lov_obd *lov = &obd->u.lov;
 533         struct lov_tgt_desc *tgt;
 534         struct obd_device *tgt_obd;
 535         int rc;
 536         ENTRY;
 537
 538         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 539                uuidp->uuid, index, gen, active);
 540
 541         if (gen <= 0) {
 542                 CERROR("request to add OBD %s with invalid generation: %d\n",
 543                        uuidp->uuid, gen);
 544                 RETURN(-EINVAL);
 545         }
 546
 547         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 548                                         &obd->obd_uuid);
 549         if (tgt_obd == NULL)
 550                 RETURN(-EINVAL);
 551
 552         mutex_lock(&lov->lov_lock);
 553
 554         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 555                 tgt = lov->lov_tgts[index];
 556                 CERROR("UUID %s already assigned at LOV target index %d\n",
 557                        obd_uuid2str(&tgt->ltd_uuid), index);
 558                 mutex_unlock(&lov->lov_lock);
 559                 RETURN(-EEXIST);
 560         }
 561
 562         if (index >= lov->lov_tgt_size) {
 563                 /* We need to reallocate the lov target array. */
 564                 struct lov_tgt_desc **newtgts, **old = NULL;
 565                 __u32 newsize, oldsize = 0;
 566
 567                 newsize = max(lov->lov_tgt_size, (__u32)2);
 568                 while (newsize < index + 1)
 569                         newsize = newsize << 1;
 570                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 571                 if (newtgts == NULL) {
 572                         mutex_unlock(&lov->lov_lock);
 573                         RETURN(-ENOMEM);
 574                 }
 575
 576                 if (lov->lov_tgt_size) {
 577                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 578                                lov->lov_tgt_size);
 579                         old = lov->lov_tgts;
 580                         oldsize = lov->lov_tgt_size;
 581                 }
 582
 583                 lov->lov_tgts = newtgts;
 584                 lov->lov_tgt_size = newsize;
 585                 smp_rmb();
 586                 if (old)
 587                         OBD_FREE(old, sizeof(*old) * oldsize);
 588
 589                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 590                        lov->lov_tgts, lov->lov_tgt_size);
 591         }
 592
 593         OBD_ALLOC_PTR(tgt);
 594         if (!tgt) {
 595                 mutex_unlock(&lov->lov_lock);
 596                 RETURN(-ENOMEM);
 597         }
 598
 599         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 600         if (rc) {
 601                 mutex_unlock(&lov->lov_lock);
 602                 OBD_FREE_PTR(tgt);
 603                 RETURN(rc);
 604         }
 605
 606         tgt->ltd_uuid = *uuidp;
 607         tgt->ltd_obd = tgt_obd;
 608         /* XXX - add a sanity check on the generation number. */
 609         tgt->ltd_gen = gen;
 610         tgt->ltd_index = index;
 611         tgt->ltd_activate = active;
 612         lov->lov_tgts[index] = tgt;
 613         if (index >= lov->desc.ld_tgt_count)
 614                 lov->desc.ld_tgt_count = index + 1;
 615
 616         mutex_unlock(&lov->lov_lock);
 617
 618         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 619                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 620
 621         rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
 622
 623         if (lov->lov_connects == 0) {
 624                 /* lov_connect hasn't been called yet. We'll do the
 625                    lov_connect_obd on this target when that fn first runs,
 626                    because we don't know the connect flags yet. */
 627                 RETURN(0);
 628         }
 629
 630         obd_getref(obd);
 631
 632         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 633         if (rc)
 634                 GOTO(out, rc);
 635
 636         /* connect to administrative disabled ost */
 637         if (!tgt->ltd_exp)
 638                 GOTO(out, rc = 0);
 639
 640         if (lov->lov_cache != NULL) {
 641                 rc = obd_set_info_async(NULL, tgt->ltd_exp,
 642                                 sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 643                                 sizeof(struct cl_client_cache), lov->lov_cache,
 644                                 NULL);
 645                 if (rc < 0)
 646                         GOTO(out, rc);
 647         }
 648
 649         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 650                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
 651                         (void *)&index);
 652
 653 out:
 654         if (rc) {
 655                 CERROR("add failed (%d), deleting %s\n", rc,
 656                        obd_uuid2str(&tgt->ltd_uuid));
 657                 lov_del_target(obd, index, 0, 0);
 658         }
 659         obd_putref(obd);
 660         RETURN(rc);
 661 }
 662
 663 /* Schedule a target for deletion */
 664 int lov_del_target(struct obd_device *obd, __u32 index,
 665                    struct obd_uuid *uuidp, int gen)
 666 {
 667         struct lov_obd *lov = &obd->u.lov;
 668         int count = lov->desc.ld_tgt_count;
 669         int rc = 0;
 670         ENTRY;
 671
 672         if (index >= count) {
 673                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 674                        index, count);
 675                 RETURN(-EINVAL);
 676         }
 677
 678         /* to make sure there's no ongoing lov_notify() now */
 679         down_write(&lov->lov_notify_lock);
 680         obd_getref(obd);
 681
 682         if (!lov->lov_tgts[index]) {
 683                 CERROR("LOV target at index %d is not setup.\n", index);
 684                 GOTO(out, rc = -EINVAL);
 685         }
 686
 687         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 688                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 689                        lov_uuid2str(lov, index), index,
 690                        obd_uuid2str(uuidp));
 691                 GOTO(out, rc = -EINVAL);
 692         }
 693
 694         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 695                lov_uuid2str(lov, index), index,
 696                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 697                lov->lov_tgts[index]->ltd_active);
 698
 699         lov->lov_tgts[index]->ltd_reap = 1;
 700         lov->lov_death_row++;
 701         /* we really delete it from obd_putref */
 702 out:
 703         obd_putref(obd);
 704         up_write(&lov->lov_notify_lock);
 705
 706         RETURN(rc);
 707 }
 708
 709 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 710 {
 711         struct obd_device *osc_obd;
 712
 713         LASSERT(tgt);
 714         LASSERT(tgt->ltd_reap);
 715
 716         osc_obd = class_exp2obd(tgt->ltd_exp);
 717
 718         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 719                tgt->ltd_uuid.uuid,
 720                osc_obd ? osc_obd->obd_name : "<no obd>");
 721
 722         if (tgt->ltd_exp)
 723                 lov_disconnect_obd(obd, tgt);
 724
 725         OBD_FREE_PTR(tgt);
 726
 727         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 728            do it ourselves. And we can't do it from lov_cleanup,
 729            because we just lost our only reference to it. */
 730         if (osc_obd)
 731                 class_manual_cleanup(osc_obd);
 732 }
 733
 734 void lov_fix_desc_stripe_size(__u64 *val)
 735 {
 736         if (*val < LOV_MIN_STRIPE_SIZE) {
 737                 if (*val != 0)
 738                         LCONSOLE_INFO("Increasing default stripe size to "
 739                                       "minimum %u\n",
 740                                       LOV_DESC_STRIPE_SIZE_DEFAULT);
 741                 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
 742         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 743                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 744                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 745                               "multiple of %u)\n",
 746                               *val, LOV_MIN_STRIPE_SIZE);
 747         }
 748 }
 749
 750 void lov_fix_desc_stripe_count(__u32 *val)
 751 {
 752         if (*val == 0)
 753                 *val = 1;
 754 }
 755
 756 void lov_fix_desc_pattern(__u32 *val)
 757 {
 758         /* from lov_setstripe */
 759         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 760                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 761                 *val = 0;
 762         }
 763 }
 764
 765 void lov_fix_desc_qos_maxage(__u32 *val)
 766 {
 767         if (*val == 0)
 768                 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
 769 }
 770
 771 void lov_fix_desc(struct lov_desc *desc)
 772 {
 773         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 774         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 775         lov_fix_desc_pattern(&desc->ld_pattern);
 776         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 777 }
 778
 779 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 780 {
 781         struct lov_desc *desc;
 782         struct lov_obd *lov = &obd->u.lov;
 783         int rc;
 784         ENTRY;
 785
 786         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 787                 CERROR("LOV setup requires a descriptor\n");
 788                 RETURN(-EINVAL);
 789         }
 790
 791         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 792
 793         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 794                 CERROR("descriptor size wrong: %d > %d\n",
 795                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 796                 RETURN(-EINVAL);
 797         }
 798
 799         if (desc->ld_magic != LOV_DESC_MAGIC) {
 800                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 801                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 802                                    obd->obd_name, desc);
 803                             lustre_swab_lov_desc(desc);
 804                 } else {
 805                         CERROR("%s: Bad lov desc magic: %#x\n",
 806                                obd->obd_name, desc->ld_magic);
 807                         RETURN(-EINVAL);
 808                 }
 809         }
 810
 811         lov_fix_desc(desc);
 812
 813         desc->ld_active_tgt_count = 0;
 814         lov->desc = *desc;
 815         lov->lov_tgt_size = 0;
 816
 817         mutex_init(&lov->lov_lock);
 818         cfs_atomic_set(&lov->lov_refcount, 0);
 819         lov->lov_sp_me = LUSTRE_SP_CLI;
 820
 821         init_rwsem(&lov->lov_notify_lock);
 822
 823         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 824                                                    HASH_POOLS_MAX_BITS,
 825                                                    HASH_POOLS_BKT_BITS, 0,
 826                                                    CFS_HASH_MIN_THETA,
 827                                                    CFS_HASH_MAX_THETA,
 828                                                    &pool_hash_operations,
 829                                                    CFS_HASH_DEFAULT);
 830         CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
 831         lov->lov_pool_count = 0;
 832         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 833         if (rc)
 834                 GOTO(out, rc);
 835
 836 #ifdef LPROCFS
 837         obd->obd_vars = lprocfs_lov_obd_vars;
 838         lprocfs_seq_obd_setup(obd);
 839         rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", 0444,
 840                                 &lov_proc_target_fops, obd);
 841         if (rc)
 842                 CWARN("Error adding the target_obd file\n");
 843
 844         lov->lov_pool_proc_entry = lprocfs_seq_register("pools",
 845                                                         obd->obd_proc_entry,
 846                                                         NULL, NULL);
 847 #endif
 848         RETURN(0);
 849
 850 out:
 851         return rc;
 852 }
 853
 854 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 855 {
 856         int rc = 0;
 857         struct lov_obd *lov = &obd->u.lov;
 858
 859         ENTRY;
 860
 861         switch (stage) {
 862         case OBD_CLEANUP_EARLY: {
 863                 int i;
 864                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 865                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 866                                 continue;
 867                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 868                                        OBD_CLEANUP_EARLY);
 869                 }
 870                 break;
 871         }
 872         default:
 873                 break;
 874         }
 875
 876         RETURN(rc);
 877 }
 878
 879 static int lov_cleanup(struct obd_device *obd)
 880 {
 881         struct lov_obd *lov = &obd->u.lov;
 882         cfs_list_t *pos, *tmp;
 883         struct pool_desc *pool;
 884         ENTRY;
 885
 886         cfs_list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 887                 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
 888                 /* free pool structs */
 889                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 890                 /* In the function below, .hs_keycmp resolves to
 891                  * pool_hashkey_keycmp() */
 892                 /* coverity[overrun-buffer-val] */
 893                 lov_pool_del(obd, pool->pool_name);
 894         }
 895         cfs_hash_putref(lov->lov_pools_hash_body);
 896         lov_ost_pool_free(&lov->lov_packed);
 897
 898         lprocfs_obd_cleanup(obd);
 899         if (lov->lov_tgts) {
 900                 int i;
 901                 obd_getref(obd);
 902                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 903                         if (!lov->lov_tgts[i])
 904                                 continue;
 905
 906                         /* Inactive targets may never have connected */
 907                         if (lov->lov_tgts[i]->ltd_active ||
 908                             cfs_atomic_read(&lov->lov_refcount))
 909                             /* We should never get here - these
 910                                should have been removed in the
 911                              disconnect. */
 912                                 CERROR("lov tgt %d not cleaned!"
 913                                        " deathrow=%d, lovrc=%d\n",
 914                                        i, lov->lov_death_row,
 915                                        cfs_atomic_read(&lov->lov_refcount));
 916                         lov_del_target(obd, i, 0, 0);
 917                 }
 918                 obd_putref(obd);
 919                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 920                          lov->lov_tgt_size);
 921                 lov->lov_tgt_size = 0;
 922         }
 923         RETURN(0);
 924 }
 925
 926 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 927                             __u32 *indexp, int *genp)
 928 {
 929         struct obd_uuid obd_uuid;
 930         int cmd;
 931         int rc = 0;
 932         ENTRY;
 933
 934         switch(cmd = lcfg->lcfg_command) {
 935         case LCFG_LOV_ADD_OBD:
 936         case LCFG_LOV_ADD_INA:
 937         case LCFG_LOV_DEL_OBD: {
 938                 __u32 index;
 939                 int gen;
 940                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 941                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 942                         GOTO(out, rc = -EINVAL);
 943
 944                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 945
 946                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
 947                         GOTO(out, rc = -EINVAL);
 948                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
 949                         GOTO(out, rc = -EINVAL);
 950                 index = *indexp;
 951                 gen = *genp;
 952                 if (cmd == LCFG_LOV_ADD_OBD)
 953                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 954                 else if (cmd == LCFG_LOV_ADD_INA)
 955                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 956                 else
 957                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 958                 GOTO(out, rc);
 959         }
 960         case LCFG_PARAM: {
 961                 struct lov_desc *desc = &(obd->u.lov.desc);
 962
 963                 if (!desc)
 964                         GOTO(out, rc = -EINVAL);
 965
 966                 rc = class_process_proc_seq_param(PARAM_LOV, obd->obd_vars,
 967                                                   lcfg, obd);
 968                 if (rc > 0)
 969                         rc = 0;
 970                 GOTO(out, rc);
 971         }
 972         case LCFG_POOL_NEW:
 973         case LCFG_POOL_ADD:
 974         case LCFG_POOL_DEL:
 975         case LCFG_POOL_REM:
 976                 GOTO(out, rc);
 977
 978         default: {
 979                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 980                 GOTO(out, rc = -EINVAL);
 981
 982         }
 983         }
 984 out:
 985         RETURN(rc);
 986 }
 987
 988 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
 989                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
 990 {
 991         struct lov_stripe_md *obj_mdp, *lsm;
 992         struct lov_obd *lov = &exp->exp_obd->u.lov;
 993         unsigned ost_idx;
 994         int rc, i;
 995         ENTRY;
 996
 997         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
 998                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
 999
1000         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1001         if (obj_mdp == NULL)
1002                 RETURN(-ENOMEM);
1003
1004         ost_idx = src_oa->o_nlink;
1005         lsm = *ea;
1006         if (lsm == NULL)
1007                 GOTO(out, rc = -EINVAL);
1008         if (ost_idx >= lov->desc.ld_tgt_count ||
1009             !lov->lov_tgts[ost_idx])
1010                 GOTO(out, rc = -EINVAL);
1011
1012         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1013                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1014                         if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) !=
1015                                         ostid_id(&src_oa->o_oi))
1016                                 GOTO(out, rc = -EINVAL);
1017                         break;
1018                 }
1019         }
1020         if (i == lsm->lsm_stripe_count)
1021                 GOTO(out, rc = -EINVAL);
1022
1023         rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp,
1024                         src_oa, &obj_mdp, oti);
1025 out:
1026         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1027         RETURN(rc);
1028 }
1029
1030 /* the LOV expects oa->o_id to be set to the LOV object id */
1031 static int lov_create(const struct lu_env *env, struct obd_export *exp,
1032                       struct obdo *src_oa, struct lov_stripe_md **ea,
1033                       struct obd_trans_info *oti)
1034 {
1035         struct lov_obd *lov;
1036         int rc = 0;
1037         ENTRY;
1038
1039         LASSERT(ea != NULL);
1040         if (exp == NULL)
1041                 RETURN(-EINVAL);
1042
1043         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1044             src_oa->o_flags == OBD_FL_DELORPHAN) {
1045                 /* should be used with LOV anymore */
1046                 LBUG();
1047         }
1048
1049         lov = &exp->exp_obd->u.lov;
1050         if (!lov->desc.ld_active_tgt_count)
1051                 RETURN(-EIO);
1052
1053         obd_getref(exp->exp_obd);
1054         /* Recreate a specific object id at the given OST index */
1055         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1056             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1057                  rc = lov_recreate(exp, src_oa, ea, oti);
1058         }
1059
1060         obd_putref(exp->exp_obd);
1061         RETURN(rc);
1062 }
1063
1064 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1065 do {                                                                            \
1066         LASSERT((lsmp) != NULL);                                                \
1067         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                          \
1068                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                            \
1069                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);              \
1070 } while (0)
1071
1072 static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
1073                        struct obdo *oa, struct lov_stripe_md *lsm,
1074                        struct obd_trans_info *oti, struct obd_export *md_exp,
1075                        void *capa)
1076 {
1077         struct lov_request_set *set;
1078         struct obd_info oinfo;
1079         struct lov_request *req;
1080         cfs_list_t *pos;
1081         struct lov_obd *lov;
1082         int rc = 0, err = 0;
1083         ENTRY;
1084
1085         ASSERT_LSM_MAGIC(lsm);
1086
1087         if (!exp || !exp->exp_obd)
1088                 RETURN(-ENODEV);
1089
1090         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1091                 LASSERT(oti);
1092                 LASSERT(oti->oti_logcookies);
1093         }
1094
1095         lov = &exp->exp_obd->u.lov;
1096         obd_getref(exp->exp_obd);
1097         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1098         if (rc)
1099                 GOTO(out, rc);
1100
1101         cfs_list_for_each (pos, &set->set_list) {
1102                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1103
1104                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1105                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1106
1107                 err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1108                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1109                 err = lov_update_common_set(set, req, err);
1110                 if (err) {
1111                         CERROR("%s: destroying objid "DOSTID" subobj "
1112                                DOSTID" on OST idx %d: rc = %d\n",
1113                                exp->exp_obd->obd_name, POSTID(&oa->o_oi),
1114                                POSTID(&req->rq_oi.oi_oa->o_oi),
1115                                req->rq_idx, err);
1116                         if (!rc)
1117                                 rc = err;
1118                 }
1119         }
1120
1121         if (rc == 0) {
1122                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1123                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1124         }
1125         err = lov_fini_destroy_set(set);
1126 out:
1127         obd_putref(exp->exp_obd);
1128         RETURN(rc ? rc : err);
1129 }
1130
1131 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1132                                  void *data, int rc)
1133 {
1134         struct lov_request_set *lovset = (struct lov_request_set *)data;
1135         int err;
1136         ENTRY;
1137
1138         /* don't do attribute merge if this aysnc op failed */
1139         if (rc)
1140                 cfs_atomic_set(&lovset->set_completes, 0);
1141         err = lov_fini_getattr_set(lovset);
1142         RETURN(rc ? rc : err);
1143 }
1144
1145 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1146                               struct ptlrpc_request_set *rqset)
1147 {
1148         struct lov_request_set *lovset;
1149         struct lov_obd *lov;
1150         cfs_list_t *pos;
1151         struct lov_request *req;
1152         int rc = 0, err;
1153         ENTRY;
1154
1155         LASSERT(oinfo);
1156         ASSERT_LSM_MAGIC(oinfo->oi_md);
1157
1158         if (!exp || !exp->exp_obd)
1159                 RETURN(-ENODEV);
1160
1161         lov = &exp->exp_obd->u.lov;
1162
1163         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1164         if (rc)
1165                 RETURN(rc);
1166
1167         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1168                POSTID(&oinfo->oi_md->lsm_oi), oinfo->oi_md->lsm_stripe_count,
1169                oinfo->oi_md->lsm_stripe_size);
1170
1171         cfs_list_for_each(pos, &lovset->set_list) {
1172                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1173
1174                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1175                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1176                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1177                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1178                                        &req->rq_oi, rqset);
1179                 if (rc) {
1180                         CERROR("%s: getattr objid "DOSTID" subobj"
1181                                DOSTID" on OST idx %d: rc = %d\n",
1182                                exp->exp_obd->obd_name,
1183                                POSTID(&oinfo->oi_oa->o_oi),
1184                                POSTID(&req->rq_oi.oi_oa->o_oi),
1185                                req->rq_idx, rc);
1186                         GOTO(out, rc);
1187                 }
1188         }
1189
1190         if (!cfs_list_empty(&rqset->set_requests)) {
1191                 LASSERT(rc == 0);
1192                 LASSERT (rqset->set_interpret == NULL);
1193                 rqset->set_interpret = lov_getattr_interpret;
1194                 rqset->set_arg = (void *)lovset;
1195                 RETURN(rc);
1196         }
1197 out:
1198         if (rc)
1199                 cfs_atomic_set(&lovset->set_completes, 0);
1200         err = lov_fini_getattr_set(lovset);
1201         RETURN(rc ? rc : err);
1202 }
1203
1204 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1205                                  void *data, int rc)
1206 {
1207         struct lov_request_set *lovset = (struct lov_request_set *)data;
1208         int err;
1209         ENTRY;
1210
1211         if (rc)
1212                 cfs_atomic_set(&lovset->set_completes, 0);
1213         err = lov_fini_setattr_set(lovset);
1214         RETURN(rc ? rc : err);
1215 }
1216
1217 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1218    needed. Otherwise, a client is waiting for responses. */
1219 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1220                              struct obd_trans_info *oti,
1221                              struct ptlrpc_request_set *rqset)
1222 {
1223         struct lov_request_set *set;
1224         struct lov_request *req;
1225         cfs_list_t *pos;
1226         struct lov_obd *lov;
1227         int rc = 0;
1228         ENTRY;
1229
1230         LASSERT(oinfo);
1231         ASSERT_LSM_MAGIC(oinfo->oi_md);
1232         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1233                 LASSERT(oti);
1234                 LASSERT(oti->oti_logcookies);
1235         }
1236
1237         if (!exp || !exp->exp_obd)
1238                 RETURN(-ENODEV);
1239
1240         lov = &exp->exp_obd->u.lov;
1241         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1242         if (rc)
1243                 RETURN(rc);
1244
1245         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1246                POSTID(&oinfo->oi_md->lsm_oi),
1247                oinfo->oi_md->lsm_stripe_count,
1248                oinfo->oi_md->lsm_stripe_size);
1249
1250         cfs_list_for_each(pos, &set->set_list) {
1251                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1252
1253                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1254                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1255
1256                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1257                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1258                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1259
1260                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1261                                        &req->rq_oi, oti, rqset);
1262                 if (rc) {
1263                         CERROR("error: setattr objid "DOSTID" subobj"
1264                                DOSTID" on OST idx %d: rc = %d\n",
1265                                POSTID(&set->set_oi->oi_oa->o_oi),
1266                                POSTID(&req->rq_oi.oi_oa->o_oi),
1267                                req->rq_idx, rc);
1268                         break;
1269                 }
1270         }
1271
1272         /* If we are not waiting for responses on async requests, return. */
1273         if (rc || !rqset || cfs_list_empty(&rqset->set_requests)) {
1274                 int err;
1275                 if (rc)
1276                         cfs_atomic_set(&set->set_completes, 0);
1277                 err = lov_fini_setattr_set(set);
1278                 RETURN(rc ? rc : err);
1279         }
1280
1281         LASSERT(rqset->set_interpret == NULL);
1282         rqset->set_interpret = lov_setattr_interpret;
1283         rqset->set_arg = (void *)set;
1284
1285         RETURN(0);
1286 }
1287
1288 static int lov_change_cbdata(struct obd_export *exp,
1289                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1290                              void *data)
1291 {
1292         struct lov_obd *lov;
1293         int rc = 0, i;
1294         ENTRY;
1295
1296         ASSERT_LSM_MAGIC(lsm);
1297
1298         if (!exp || !exp->exp_obd)
1299                 RETURN(-ENODEV);
1300
1301         lov = &exp->exp_obd->u.lov;
1302         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1303                 struct lov_stripe_md submd;
1304                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1305
1306                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1307                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1308                         continue;
1309                 }
1310
1311                 submd.lsm_oi = loi->loi_oi;
1312                 submd.lsm_stripe_count = 0;
1313                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1314                                        &submd, it, data);
1315         }
1316         RETURN(rc);
1317 }
1318
1319 /* find any ldlm lock of the inode in lov
1320  * return 0    not find
1321  *        1    find one
1322  *      < 0    error */
1323 static int lov_find_cbdata(struct obd_export *exp,
1324                            struct lov_stripe_md *lsm, ldlm_iterator_t it,
1325                            void *data)
1326 {
1327         struct lov_obd *lov;
1328         int rc = 0, i;
1329         ENTRY;
1330
1331         ASSERT_LSM_MAGIC(lsm);
1332
1333         if (!exp || !exp->exp_obd)
1334                 RETURN(-ENODEV);
1335
1336         lov = &exp->exp_obd->u.lov;
1337         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1338                 struct lov_stripe_md submd;
1339                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1340
1341                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1342                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1343                         continue;
1344                 }
1345                 submd.lsm_oi = loi->loi_oi;
1346                 submd.lsm_stripe_count = 0;
1347                 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1348                                      &submd, it, data);
1349                 if (rc != 0)
1350                         RETURN(rc);
1351         }
1352         RETURN(rc);
1353 }
1354
1355 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1356 {
1357         struct lov_request_set *lovset = (struct lov_request_set *)data;
1358         int err;
1359         ENTRY;
1360
1361         if (rc)
1362                 cfs_atomic_set(&lovset->set_completes, 0);
1363
1364         err = lov_fini_statfs_set(lovset);
1365         RETURN(rc ? rc : err);
1366 }
1367
1368 static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
1369                             __u64 max_age, struct ptlrpc_request_set *rqset)
1370 {
1371         struct obd_device      *obd = class_exp2obd(exp);
1372         struct lov_request_set *set;
1373         struct lov_request *req;
1374         cfs_list_t *pos;
1375         struct lov_obd *lov;
1376         int rc = 0;
1377         ENTRY;
1378
1379         LASSERT(oinfo != NULL);
1380         LASSERT(oinfo->oi_osfs != NULL);
1381
1382         lov = &obd->u.lov;
1383         rc = lov_prep_statfs_set(obd, oinfo, &set);
1384         if (rc)
1385                 RETURN(rc);
1386
1387         cfs_list_for_each (pos, &set->set_list) {
1388                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1389                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1390                                       &req->rq_oi, max_age, rqset);
1391                 if (rc)
1392                         break;
1393         }
1394
1395         if (rc || cfs_list_empty(&rqset->set_requests)) {
1396                 int err;
1397                 if (rc)
1398                         cfs_atomic_set(&set->set_completes, 0);
1399                 err = lov_fini_statfs_set(set);
1400                 RETURN(rc ? rc : err);
1401         }
1402
1403         LASSERT(rqset->set_interpret == NULL);
1404         rqset->set_interpret = lov_statfs_interpret;
1405         rqset->set_arg = (void *)set;
1406         RETURN(0);
1407 }
1408
1409 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
1410                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1411 {
1412         struct ptlrpc_request_set *set = NULL;
1413         struct obd_info oinfo = { { { 0 } } };
1414         int rc = 0;
1415         ENTRY;
1416
1417
1418         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1419          * statfs requests */
1420         set = ptlrpc_prep_set();
1421         if (set == NULL)
1422                 RETURN(-ENOMEM);
1423
1424         oinfo.oi_osfs = osfs;
1425         oinfo.oi_flags = flags;
1426         rc = lov_statfs_async(exp, &oinfo, max_age, set);
1427         if (rc == 0)
1428                 rc = ptlrpc_set_wait(set);
1429         ptlrpc_set_destroy(set);
1430
1431         RETURN(rc);
1432 }
1433
1434 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1435                          void *karg, void *uarg)
1436 {
1437         struct obd_device *obddev = class_exp2obd(exp);
1438         struct lov_obd *lov = &obddev->u.lov;
1439         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1440         struct obd_uuid *uuidp;
1441         ENTRY;
1442
1443         switch (cmd) {
1444         case IOC_OBD_STATFS: {
1445                 struct obd_ioctl_data *data = karg;
1446                 struct obd_device *osc_obd;
1447                 struct obd_statfs stat_buf = {0};
1448                 __u32 index;
1449                 __u32 flags;
1450
1451                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1452                 if ((index >= count))
1453                         RETURN(-ENODEV);
1454
1455                 if (!lov->lov_tgts[index])
1456                         /* Try again with the next index */
1457                         RETURN(-EAGAIN);
1458                 if (!lov->lov_tgts[index]->ltd_active)
1459                         RETURN(-ENODATA);
1460
1461                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1462                 if (!osc_obd)
1463                         RETURN(-EINVAL);
1464
1465                 /* copy UUID */
1466                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1467                                  min((int)data->ioc_plen2,
1468                                      (int)sizeof(struct obd_uuid))))
1469                         RETURN(-EFAULT);
1470
1471                 flags = uarg ? *(__u32*)uarg : 0;
1472                 /* got statfs data */
1473                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1474                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1475                                 flags);
1476                 if (rc)
1477                         RETURN(rc);
1478                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1479                                      min((int) data->ioc_plen1,
1480                                          (int) sizeof(stat_buf))))
1481                         RETURN(-EFAULT);
1482                 break;
1483         }
1484         case OBD_IOC_LOV_GET_CONFIG: {
1485                 struct obd_ioctl_data *data;
1486                 struct lov_desc *desc;
1487                 char *buf = NULL;
1488                 __u32 *genp;
1489
1490                 len = 0;
1491                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1492                         RETURN(-EINVAL);
1493
1494                 data = (struct obd_ioctl_data *)buf;
1495
1496                 if (sizeof(*desc) > data->ioc_inllen1) {
1497                         obd_ioctl_freedata(buf, len);
1498                         RETURN(-EINVAL);
1499                 }
1500
1501                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1502                         obd_ioctl_freedata(buf, len);
1503                         RETURN(-EINVAL);
1504                 }
1505
1506                 if (sizeof(__u32) * count > data->ioc_inllen3) {
1507                         obd_ioctl_freedata(buf, len);
1508                         RETURN(-EINVAL);
1509                 }
1510
1511                 desc = (struct lov_desc *)data->ioc_inlbuf1;
1512                 memcpy(desc, &(lov->desc), sizeof(*desc));
1513
1514                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1515                 genp = (__u32 *)data->ioc_inlbuf3;
1516                 /* the uuid will be empty for deleted OSTs */
1517                 for (i = 0; i < count; i++, uuidp++, genp++) {
1518                         if (!lov->lov_tgts[i])
1519                                 continue;
1520                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
1521                         *genp = lov->lov_tgts[i]->ltd_gen;
1522                 }
1523
1524                 if (copy_to_user((void *)uarg, buf, len))
1525                         rc = -EFAULT;
1526                 obd_ioctl_freedata(buf, len);
1527                 break;
1528         }
1529         case LL_IOC_LOV_GETSTRIPE:
1530                 rc = lov_getstripe(exp, karg, uarg);
1531                 break;
1532         case OBD_IOC_QUOTACTL: {
1533                 struct if_quotactl *qctl = karg;
1534                 struct lov_tgt_desc *tgt = NULL;
1535                 struct obd_quotactl *oqctl;
1536
1537                 if (qctl->qc_valid == QC_OSTIDX) {
1538                         if (count <= qctl->qc_idx)
1539                                 RETURN(-EINVAL);
1540
1541                         tgt = lov->lov_tgts[qctl->qc_idx];
1542                         if (!tgt || !tgt->ltd_exp)
1543                                 RETURN(-EINVAL);
1544                 } else if (qctl->qc_valid == QC_UUID) {
1545                         for (i = 0; i < count; i++) {
1546                                 tgt = lov->lov_tgts[i];
1547                                 if (!tgt ||
1548                                     !obd_uuid_equals(&tgt->ltd_uuid,
1549                                                      &qctl->obd_uuid))
1550                                         continue;
1551
1552                                 if (tgt->ltd_exp == NULL)
1553                                         RETURN(-EINVAL);
1554
1555                                 break;
1556                         }
1557                 } else {
1558                         RETURN(-EINVAL);
1559                 }
1560
1561                 if (i >= count)
1562                         RETURN(-EAGAIN);
1563
1564                 LASSERT(tgt && tgt->ltd_exp);
1565                 OBD_ALLOC_PTR(oqctl);
1566                 if (!oqctl)
1567                         RETURN(-ENOMEM);
1568
1569                 QCTL_COPY(oqctl, qctl);
1570                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1571                 if (rc == 0) {
1572                         QCTL_COPY(qctl, oqctl);
1573                         qctl->qc_valid = QC_OSTIDX;
1574                         qctl->obd_uuid = tgt->ltd_uuid;
1575                 }
1576                 OBD_FREE_PTR(oqctl);
1577                 break;
1578         }
1579         default: {
1580                 int set = 0;
1581
1582                 if (count == 0)
1583                         RETURN(-ENOTTY);
1584
1585                 for (i = 0; i < count; i++) {
1586                         int err;
1587                         struct obd_device *osc_obd;
1588
1589                         /* OST was disconnected */
1590                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1591                                 continue;
1592
1593                         /* ll_umount_begin() sets force flag but for lov, not
1594                          * osc. Let's pass it through */
1595                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1596                         osc_obd->obd_force = obddev->obd_force;
1597                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1598                                             len, karg, uarg);
1599                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
1600                                 RETURN(err);
1601                         } else if (err) {
1602                                 if (lov->lov_tgts[i]->ltd_active) {
1603                                         CDEBUG(err == -ENOTTY ?
1604                                                D_IOCTL : D_WARNING,
1605                                                "iocontrol OSC %s on OST "
1606                                                "idx %d cmd %x: err = %d\n",
1607                                                lov_uuid2str(lov, i),
1608                                                i, cmd, err);
1609                                         if (!rc)
1610                                                 rc = err;
1611                                 }
1612                         } else {
1613                                 set = 1;
1614                         }
1615                 }
1616                 if (!set && !rc)
1617                         rc = -EIO;
1618         }
1619         }
1620
1621         RETURN(rc);
1622 }
1623
1624 #define FIEMAP_BUFFER_SIZE 4096
1625
1626 /**
1627  * Non-zero fe_logical indicates that this is a continuation FIEMAP
1628  * call. The local end offset and the device are sent in the first
1629  * fm_extent. This function calculates the stripe number from the index.
1630  * This function returns a stripe_no on which mapping is to be restarted.
1631  *
1632  * This function returns fm_end_offset which is the in-OST offset at which
1633  * mapping should be restarted. If fm_end_offset=0 is returned then caller
1634  * will re-calculate proper offset in next stripe.
1635  * Note that the first extent is passed to lov_get_info via the value field.
1636  *
1637  * \param fiemap fiemap request header
1638  * \param lsm striping information for the file
1639  * \param fm_start logical start of mapping
1640  * \param fm_end logical end of mapping
1641  * \param start_stripe starting stripe will be returned in this
1642  */
1643 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
1644                                    struct lov_stripe_md *lsm, obd_size fm_start,
1645                                    obd_size fm_end, int *start_stripe)
1646 {
1647         obd_size local_end = fiemap->fm_extents[0].fe_logical;
1648         obd_off lun_start, lun_end;
1649         obd_size fm_end_offset;
1650         int stripe_no = -1, i;
1651
1652         if (fiemap->fm_extent_count == 0 ||
1653             fiemap->fm_extents[0].fe_logical == 0)
1654                 return 0;
1655
1656         /* Find out stripe_no from ost_index saved in the fe_device */
1657         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1658                 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
1659                                         fiemap->fm_extents[0].fe_device) {
1660                         stripe_no = i;
1661                         break;
1662                 }
1663         }
1664         if (stripe_no == -1)
1665                 return -EINVAL;
1666
1667         /* If we have finished mapping on previous device, shift logical
1668          * offset to start of next device */
1669         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
1670                                    &lun_start, &lun_end)) != 0 &&
1671                                    local_end < lun_end) {
1672                 fm_end_offset = local_end;
1673                 *start_stripe = stripe_no;
1674         } else {
1675                 /* This is a special value to indicate that caller should
1676                  * calculate offset in next stripe. */
1677                 fm_end_offset = 0;
1678                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
1679         }
1680
1681         return fm_end_offset;
1682 }
1683
1684 /**
1685  * We calculate on which OST the mapping will end. If the length of mapping
1686  * is greater than (stripe_size * stripe_count) then the last_stripe will
1687  * will be one just before start_stripe. Else we check if the mapping
1688  * intersects each OST and find last_stripe.
1689  * This function returns the last_stripe and also sets the stripe_count
1690  * over which the mapping is spread
1691  *
1692  * \param lsm striping information for the file
1693  * \param fm_start logical start of mapping
1694  * \param fm_end logical end of mapping
1695  * \param start_stripe starting stripe of the mapping
1696  * \param stripe_count the number of stripes across which to map is returned
1697  *
1698  * \retval last_stripe return the last stripe of the mapping
1699  */
1700 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
1701                             obd_size fm_end, int start_stripe,
1702                             int *stripe_count)
1703 {
1704         int last_stripe;
1705         obd_off obd_start, obd_end;
1706         int i, j;
1707
1708         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
1709                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
1710                                                               start_stripe - 1);
1711                 *stripe_count = lsm->lsm_stripe_count;
1712         } else {
1713                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
1714                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
1715                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
1716                                                    &obd_start, &obd_end)) == 0)
1717                                 break;
1718                 }
1719                 *stripe_count = j;
1720                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
1721         }
1722
1723         return last_stripe;
1724 }
1725
1726 /**
1727  * Set fe_device and copy extents from local buffer into main return buffer.
1728  *
1729  * \param fiemap fiemap request header
1730  * \param lcl_fm_ext array of local fiemap extents to be copied
1731  * \param ost_index OST index to be written into the fm_device field for each
1732                     extent
1733  * \param ext_count number of extents to be copied
1734  * \param current_extent where to start copying in main extent array
1735  */
1736 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
1737                                   struct ll_fiemap_extent *lcl_fm_ext,
1738                                   int ost_index, unsigned int ext_count,
1739                                   int current_extent)
1740 {
1741         char *to;
1742         int ext;
1743
1744         for (ext = 0; ext < ext_count; ext++) {
1745                 lcl_fm_ext[ext].fe_device = ost_index;
1746                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
1747         }
1748
1749         /* Copy fm_extent's from fm_local to return buffer */
1750         to = (char *)fiemap + fiemap_count_to_size(current_extent);
1751         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
1752 }
1753
1754 /**
1755  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
1756  * This also handles the restarting of FIEMAP calls in case mapping overflows
1757  * the available number of extents in single call.
1758  */
1759 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
1760                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
1761 {
1762         struct ll_fiemap_info_key *fm_key = key;
1763         struct ll_user_fiemap *fiemap = val;
1764         struct ll_user_fiemap *fm_local = NULL;
1765         struct ll_fiemap_extent *lcl_fm_ext;
1766         int count_local;
1767         unsigned int get_num_extents = 0;
1768         int ost_index = 0, actual_start_stripe, start_stripe;
1769         obd_size fm_start, fm_end, fm_length, fm_end_offset;
1770         obd_size curr_loc;
1771         int current_extent = 0, rc = 0, i;
1772         int ost_eof = 0; /* EOF for object */
1773         int ost_done = 0; /* done with required mapping for this OST? */
1774         int last_stripe;
1775         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
1776         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
1777
1778         if (!lsm_has_objects(lsm)) {
1779                 if (lsm && lsm_is_released(lsm) && (fm_key->fiemap.fm_start <
1780                     fm_key->oa.o_size)) {
1781                         /* released file, return a minimal FIEMAP if
1782                          * request fits in file-size.
1783                          */
1784                         fiemap->fm_mapped_extents = 1;
1785                         fiemap->fm_extents[0].fe_logical =
1786                                                 fm_key->fiemap.fm_start;
1787                         if (fm_key->fiemap.fm_start + fm_key->fiemap.fm_length <
1788                             fm_key->oa.o_size)
1789                                 fiemap->fm_extents[0].fe_length =
1790                                                 fm_key->fiemap.fm_length;
1791                         else
1792                                 fiemap->fm_extents[0].fe_length =
1793                                                 fm_key->oa.o_size -
1794                                                 fm_key->fiemap.fm_start;
1795                         fiemap->fm_extents[0].fe_flags |=
1796                                                 (FIEMAP_EXTENT_UNKNOWN |
1797                                                  FIEMAP_EXTENT_LAST);
1798                 }
1799                 GOTO(out, rc = 0);
1800         }
1801
1802         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
1803                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
1804
1805         OBD_ALLOC_LARGE(fm_local, buffer_size);
1806         if (fm_local == NULL)
1807                 GOTO(out, rc = -ENOMEM);
1808         lcl_fm_ext = &fm_local->fm_extents[0];
1809
1810         count_local = fiemap_size_to_count(buffer_size);
1811
1812         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
1813         fm_start = fiemap->fm_start;
1814         fm_length = fiemap->fm_length;
1815         /* Calculate start stripe, last stripe and length of mapping */
1816         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
1817         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
1818                                                 fm_start + fm_length - 1);
1819         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
1820         if (fm_end > fm_key->oa.o_size)
1821                 fm_end = fm_key->oa.o_size;
1822
1823         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
1824                                             actual_start_stripe, &stripe_count);
1825
1826         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start,
1827                                                   fm_end, &start_stripe);
1828         if (fm_end_offset == -EINVAL)
1829                 GOTO(out, rc = -EINVAL);
1830
1831         if (fiemap->fm_extent_count == 0) {
1832                 get_num_extents = 1;
1833                 count_local = 0;
1834         }
1835
1836         /* Check each stripe */
1837         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
1838              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
1839                 obd_size req_fm_len; /* Stores length of required mapping */
1840                 obd_size len_mapped_single_call;
1841                 obd_off lun_start, lun_end, obd_object_end;
1842                 unsigned int ext_count;
1843
1844                 cur_stripe_wrap = cur_stripe;
1845
1846                 /* Find out range of mapping on this stripe */
1847                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
1848                                            &lun_start, &obd_object_end)) == 0)
1849                         continue;
1850
1851                 /* If this is a continuation FIEMAP call and we are on
1852                  * starting stripe then lun_start needs to be set to
1853                  * fm_end_offset */
1854                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
1855                         lun_start = fm_end_offset;
1856
1857                 if (fm_length != ~0ULL) {
1858                         /* Handle fm_start + fm_length overflow */
1859                         if (fm_start + fm_length < fm_start)
1860                                 fm_length = ~0ULL - fm_start;
1861                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
1862                                                      cur_stripe);
1863                 } else {
1864                         lun_end = ~0ULL;
1865                 }
1866
1867                 if (lun_start == lun_end)
1868                         continue;
1869
1870                 req_fm_len = obd_object_end - lun_start;
1871                 fm_local->fm_length = 0;
1872                 len_mapped_single_call = 0;
1873
1874                 /* If the output buffer is very large and the objects have many
1875                  * extents we may need to loop on a single OST repeatedly */
1876                 ost_eof = 0;
1877                 ost_done = 0;
1878                 do {
1879                         if (get_num_extents == 0) {
1880                                 /* Don't get too many extents. */
1881                                 if (current_extent + count_local >
1882                                     fiemap->fm_extent_count)
1883                                         count_local = fiemap->fm_extent_count -
1884                                                                  current_extent;
1885                         }
1886
1887                         lun_start += len_mapped_single_call;
1888                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
1889                         req_fm_len = fm_local->fm_length;
1890                         fm_local->fm_extent_count = count_local;
1891                         fm_local->fm_mapped_extents = 0;
1892                         fm_local->fm_flags = fiemap->fm_flags;
1893
1894                         fm_key->oa.o_oi = lsm->lsm_oinfo[cur_stripe]->loi_oi;
1895                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
1896
1897                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
1898                                 GOTO(out, rc = -EINVAL);
1899
1900                         /* If OST is inactive, return extent with UNKNOWN flag */
1901                         if (!lov->lov_tgts[ost_index]->ltd_active) {
1902                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
1903                                 fm_local->fm_mapped_extents = 1;
1904
1905                                 lcl_fm_ext[0].fe_logical = lun_start;
1906                                 lcl_fm_ext[0].fe_length = obd_object_end -
1907                                                                       lun_start;
1908                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
1909
1910                                 goto inactive_tgt;
1911                         }
1912
1913                         fm_local->fm_start = lun_start;
1914                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
1915                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
1916                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
1917                         rc = obd_get_info(NULL,
1918                                           lov->lov_tgts[ost_index]->ltd_exp,
1919                                           keylen, key, vallen, fm_local, lsm);
1920                         if (rc != 0)
1921                                 GOTO(out, rc);
1922
1923 inactive_tgt:
1924                         ext_count = fm_local->fm_mapped_extents;
1925                         if (ext_count == 0) {
1926                                 ost_done = 1;
1927                                 /* If last stripe has hole at the end,
1928                                  * then we need to return */
1929                                 if (cur_stripe_wrap == last_stripe) {
1930                                         fiemap->fm_mapped_extents = 0;
1931                                         goto finish;
1932                                 }
1933                                 break;
1934                         }
1935
1936                         /* If we just need num of extents then go to next device */
1937                         if (get_num_extents) {
1938                                 current_extent += ext_count;
1939                                 break;
1940                         }
1941
1942                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
1943                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
1944
1945                         /* Have we finished mapping on this device? */
1946                         if (req_fm_len <= len_mapped_single_call)
1947                                 ost_done = 1;
1948
1949                         /* Clear the EXTENT_LAST flag which can be present on
1950                          * last extent */
1951                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
1952                                 lcl_fm_ext[ext_count - 1].fe_flags &=
1953                                                             ~FIEMAP_EXTENT_LAST;
1954
1955                         curr_loc = lov_stripe_size(lsm,
1956                                            lcl_fm_ext[ext_count - 1].fe_logical+
1957                                            lcl_fm_ext[ext_count - 1].fe_length,
1958                                            cur_stripe);
1959                         if (curr_loc >= fm_key->oa.o_size)
1960                                 ost_eof = 1;
1961
1962                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
1963                                                      ost_index, ext_count,
1964                                                      current_extent);
1965
1966                         current_extent += ext_count;
1967
1968                         /* Ran out of available extents? */
1969                         if (current_extent >= fiemap->fm_extent_count)
1970                                 goto finish;
1971                 } while (ost_done == 0 && ost_eof == 0);
1972
1973                 if (cur_stripe_wrap == last_stripe)
1974                         goto finish;
1975         }
1976
1977 finish:
1978         /* Indicate that we are returning device offsets unless file just has
1979          * single stripe */
1980         if (lsm->lsm_stripe_count > 1)
1981                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
1982
1983         if (get_num_extents)
1984                 goto skip_last_device_calc;
1985
1986         /* Check if we have reached the last stripe and whether mapping for that
1987          * stripe is done. */
1988         if (cur_stripe_wrap == last_stripe) {
1989                 if (ost_done || ost_eof)
1990                         fiemap->fm_extents[current_extent - 1].fe_flags |=
1991                                                              FIEMAP_EXTENT_LAST;
1992         }
1993
1994 skip_last_device_calc:
1995         fiemap->fm_mapped_extents = current_extent;
1996
1997 out:
1998         if (fm_local)
1999                 OBD_FREE_LARGE(fm_local, buffer_size);
2000         return rc;
2001 }
2002
2003 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
2004                         __u32 keylen, void *key, __u32 *vallen, void *val,
2005                         struct lov_stripe_md *lsm)
2006 {
2007         struct obd_device *obddev = class_exp2obd(exp);
2008         struct lov_obd *lov = &obddev->u.lov;
2009         int i, rc;
2010         ENTRY;
2011
2012         if (!vallen || !val)
2013                 RETURN(-EFAULT);
2014
2015         obd_getref(obddev);
2016
2017         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2018                 struct {
2019                         char name[16];
2020                         struct ldlm_lock *lock;
2021                 } *data = key;
2022                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2023                 struct lov_oinfo *loi;
2024                 __u32 *stripe = val;
2025
2026                 if (*vallen < sizeof(*stripe))
2027                         GOTO(out, rc = -EFAULT);
2028                 *vallen = sizeof(*stripe);
2029
2030                 /* XXX This is another one of those bits that will need to
2031                  * change if we ever actually support nested LOVs.  It uses
2032                  * the lock's export to find out which stripe it is. */
2033                 /* XXX - it's assumed all the locks for deleted OSTs have
2034                  * been cancelled. Also, the export for deleted OSTs will
2035                  * be NULL and won't match the lock's export. */
2036                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2037                         loi = lsm->lsm_oinfo[i];
2038                         if (!lov->lov_tgts[loi->loi_ost_idx])
2039                                 continue;
2040                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2041                             data->lock->l_conn_export &&
2042                             ostid_res_name_eq(&loi->loi_oi, res_id)) {
2043                                 *stripe = i;
2044                                 GOTO(out, rc = 0);
2045                         }
2046                 }
2047                 LDLM_ERROR(data->lock, "lock on inode without such object");
2048                 dump_lsm(D_ERROR, lsm);
2049                 GOTO(out, rc = -ENXIO);
2050         } else if (KEY_IS(KEY_LAST_ID)) {
2051                 struct obd_id_info *info = val;
2052                 __u32 size = sizeof(obd_id);
2053                 struct lov_tgt_desc *tgt;
2054
2055                 LASSERT(*vallen == sizeof(struct obd_id_info));
2056                 tgt = lov->lov_tgts[info->idx];
2057
2058                 if (!tgt || !tgt->ltd_active)
2059                         GOTO(out, rc = -ESRCH);
2060
2061                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
2062                                   &size, info->data, NULL);
2063                 GOTO(out, rc = 0);
2064         } else if (KEY_IS(KEY_LOVDESC)) {
2065                 struct lov_desc *desc_ret = val;
2066                 *desc_ret = lov->desc;
2067
2068                 GOTO(out, rc = 0);
2069         } else if (KEY_IS(KEY_FIEMAP)) {
2070                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2071                 GOTO(out, rc);
2072         } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2073                 struct lov_tgt_desc *tgt;
2074                 __u64 ost_idx = *((__u64*)val);
2075
2076                 LASSERT(*vallen == sizeof(__u64));
2077                 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2078                 tgt = lov->lov_tgts[ost_idx];
2079
2080                 if (!tgt || !tgt->ltd_exp)
2081                         GOTO(out, rc = -ESRCH);
2082
2083                 *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp);
2084                 GOTO(out, rc = 0);
2085         } else if (KEY_IS(KEY_TGT_COUNT)) {
2086                 *((int *)val) = lov->desc.ld_tgt_count;
2087                 GOTO(out, rc = 0);
2088         }
2089
2090         rc = -EINVAL;
2091
2092 out:
2093         obd_putref(obddev);
2094         RETURN(rc);
2095 }
2096
2097 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
2098                               obd_count keylen, void *key, obd_count vallen,
2099                               void *val, struct ptlrpc_request_set *set)
2100 {
2101         struct obd_device *obddev = class_exp2obd(exp);
2102         struct lov_obd *lov = &obddev->u.lov;
2103         obd_count count;
2104         int i, rc = 0, err;
2105         struct lov_tgt_desc *tgt;
2106         unsigned incr, check_uuid,
2107                  do_inactive, no_set;
2108         unsigned next_id = 0,  mds_con = 0, capa = 0;
2109         ENTRY;
2110
2111         incr = check_uuid = do_inactive = no_set = 0;
2112         if (set == NULL) {
2113                 no_set = 1;
2114                 set = ptlrpc_prep_set();
2115                 if (!set)
2116                         RETURN(-ENOMEM);
2117         }
2118
2119         obd_getref(obddev);
2120         count = lov->desc.ld_tgt_count;
2121
2122         if (KEY_IS(KEY_NEXT_ID)) {
2123                 count = vallen / sizeof(struct obd_id_info);
2124                 vallen = sizeof(obd_id);
2125                 incr = sizeof(struct obd_id_info);
2126                 do_inactive = 1;
2127                 next_id = 1;
2128         } else if (KEY_IS(KEY_CHECKSUM)) {
2129                 do_inactive = 1;
2130         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2131                 /* use defaults:  do_inactive = incr = 0; */
2132         } else if (KEY_IS(KEY_MDS_CONN)) {
2133                 mds_con = 1;
2134         } else if (KEY_IS(KEY_CAPA_KEY)) {
2135                 capa = 1;
2136         } else if (KEY_IS(KEY_CACHE_SET)) {
2137                 LASSERT(lov->lov_cache == NULL);
2138                 lov->lov_cache = val;
2139                 do_inactive = 1;
2140         }
2141
2142         for (i = 0; i < count; i++, val = (char *)val + incr) {
2143                 if (next_id) {
2144                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2145                 } else {
2146                         tgt = lov->lov_tgts[i];
2147                 }
2148                 /* OST was disconnected */
2149                 if (!tgt || !tgt->ltd_exp)
2150                         continue;
2151
2152                 /* OST is inactive and we don't want inactive OSCs */
2153                 if (!tgt->ltd_active && !do_inactive)
2154                         continue;
2155
2156                 if (mds_con) {
2157                         struct mds_group_info *mgi;
2158
2159                         LASSERT(vallen == sizeof(*mgi));
2160                         mgi = (struct mds_group_info *)val;
2161
2162                         /* Only want a specific OSC */
2163                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2164                                                 &tgt->ltd_uuid))
2165                                 continue;
2166
2167                         err = obd_set_info_async(env, tgt->ltd_exp,
2168                                          keylen, key, sizeof(int),
2169                                          &mgi->group, set);
2170                 } else if (next_id) {
2171                         err = obd_set_info_async(env, tgt->ltd_exp,
2172                                          keylen, key, vallen,
2173                                          ((struct obd_id_info*)val)->data, set);
2174                 } else if (capa) {
2175                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2176
2177                         LASSERT(vallen == sizeof(*info));
2178
2179                          /* Only want a specific OSC */
2180                         if (info->uuid &&
2181                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2182                                 continue;
2183
2184                         err = obd_set_info_async(env, tgt->ltd_exp, keylen,
2185                                                  key, sizeof(*info->capa),
2186                                                  info->capa, set);
2187                 } else {
2188                         /* Only want a specific OSC */
2189                         if (check_uuid &&
2190                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2191                                 continue;
2192
2193                         err = obd_set_info_async(env, tgt->ltd_exp,
2194                                          keylen, key, vallen, val, set);
2195                 }
2196
2197                 if (!rc)
2198                         rc = err;
2199         }
2200
2201         obd_putref(obddev);
2202         if (no_set) {
2203                 err = ptlrpc_set_wait(set);
2204                 if (!rc)
2205                         rc = err;
2206                 ptlrpc_set_destroy(set);
2207         }
2208         RETURN(rc);
2209 }
2210
2211 void lov_stripe_lock(struct lov_stripe_md *md)
2212 {
2213         LASSERT(md->lsm_lock_owner != current_pid());
2214         spin_lock(&md->lsm_lock);
2215         LASSERT(md->lsm_lock_owner == 0);
2216         md->lsm_lock_owner = current_pid();
2217 }
2218
2219 void lov_stripe_unlock(struct lov_stripe_md *md)
2220 {
2221         LASSERT(md->lsm_lock_owner == current_pid());
2222         md->lsm_lock_owner = 0;
2223         spin_unlock(&md->lsm_lock);
2224 }
2225
2226 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
2227                         struct obd_quotactl *oqctl)
2228 {
2229         struct lov_obd      *lov = &obd->u.lov;
2230         struct lov_tgt_desc *tgt;
2231         __u64                curspace = 0;
2232         __u64                bhardlimit = 0;
2233         int                  i, rc = 0;
2234         ENTRY;
2235
2236         if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON &&
2237             oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF &&
2238             oqctl->qc_cmd != Q_GETOQUOTA &&
2239             oqctl->qc_cmd != Q_INITQUOTA &&
2240             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
2241             oqctl->qc_cmd != Q_FINVALIDATE) {
2242                 CERROR("bad quota opc %x for lov obd", oqctl->qc_cmd);
2243                 RETURN(-EFAULT);
2244         }
2245
2246         /* for lov tgt */
2247         obd_getref(obd);
2248         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2249                 int err;
2250
2251                 tgt = lov->lov_tgts[i];
2252
2253                 if (!tgt)
2254                         continue;
2255
2256                 if (!tgt->ltd_active || tgt->ltd_reap) {
2257                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
2258                             lov->lov_tgts[i]->ltd_activate) {
2259                                 rc = -EREMOTEIO;
2260                                 CERROR("ost %d is inactive\n", i);
2261                         } else {
2262                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
2263                         }
2264                         continue;
2265                 }
2266
2267                 err = obd_quotactl(tgt->ltd_exp, oqctl);
2268                 if (err) {
2269                         if (tgt->ltd_active && !rc)
2270                                 rc = err;
2271                         continue;
2272                 }
2273
2274                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2275                         curspace += oqctl->qc_dqblk.dqb_curspace;
2276                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
2277                 }
2278         }
2279         obd_putref(obd);
2280
2281         if (oqctl->qc_cmd == Q_GETOQUOTA) {
2282                 oqctl->qc_dqblk.dqb_curspace = curspace;
2283                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
2284         }
2285         RETURN(rc);
2286 }
2287
2288 static int lov_quotacheck(struct obd_device *obd, struct obd_export *exp,
2289                           struct obd_quotactl *oqctl)
2290 {
2291         struct lov_obd *lov = &obd->u.lov;
2292         int             i, rc = 0;
2293         ENTRY;
2294
2295         obd_getref(obd);
2296
2297         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2298                 if (!lov->lov_tgts[i])
2299                         continue;
2300
2301                 /* Skip quota check on the administratively disabled OSTs. */
2302                 if (!lov->lov_tgts[i]->ltd_activate) {
2303                         CWARN("lov idx %d was administratively disabled, "
2304                               "skip quotacheck on it.\n", i);
2305                         continue;
2306                 }
2307
2308                 if (!lov->lov_tgts[i]->ltd_active) {
2309                         CERROR("lov idx %d inactive\n", i);
2310                         rc = -EIO;
2311                         goto out;
2312                 }
2313         }
2314
2315         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2316                 int err;
2317
2318                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate)
2319                         continue;
2320
2321                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
2322                 if (err && !rc)
2323                         rc = err;
2324         }
2325
2326 out:
2327         obd_putref(obd);
2328
2329         RETURN(rc);
2330 }
2331
2332 static struct obd_ops lov_obd_ops = {
2333         .o_owner                = THIS_MODULE,
2334         .o_setup                = lov_setup,
2335         .o_precleanup           = lov_precleanup,
2336         .o_cleanup              = lov_cleanup,
2337         .o_connect              = lov_connect,
2338         .o_disconnect           = lov_disconnect,
2339         .o_statfs               = lov_statfs,
2340         .o_statfs_async         = lov_statfs_async,
2341         .o_packmd               = lov_packmd,
2342         .o_unpackmd             = lov_unpackmd,
2343         .o_create               = lov_create,
2344         .o_destroy              = lov_destroy,
2345         .o_getattr_async        = lov_getattr_async,
2346         .o_setattr_async        = lov_setattr_async,
2347         .o_adjust_kms           = lov_adjust_kms,
2348         .o_change_cbdata        = lov_change_cbdata,
2349         .o_find_cbdata          = lov_find_cbdata,
2350         .o_iocontrol            = lov_iocontrol,
2351         .o_get_info             = lov_get_info,
2352         .o_set_info_async       = lov_set_info_async,
2353         .o_notify               = lov_notify,
2354         .o_pool_new             = lov_pool_new,
2355         .o_pool_rem             = lov_pool_remove,
2356         .o_pool_add             = lov_pool_add,
2357         .o_pool_del             = lov_pool_del,
2358         .o_getref               = lov_getref,
2359         .o_putref               = lov_putref,
2360         .o_quotactl             = lov_quotactl,
2361         .o_quotacheck           = lov_quotacheck,
2362 };
2363
2364 struct kmem_cache *lov_oinfo_slab;
2365
2366 extern struct lu_kmem_descr lov_caches[];
2367
2368 int __init lov_init(void)
2369 {
2370         int rc;
2371         ENTRY;
2372
2373         /* print an address of _any_ initialized kernel symbol from this
2374          * module, to allow debugging with gdb that doesn't support data
2375          * symbols from modules.*/
2376         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
2377
2378         rc = lu_kmem_init(lov_caches);
2379         if (rc)
2380                 return rc;
2381
2382         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
2383                                            sizeof(struct lov_oinfo), 0,
2384                                            SLAB_HWCACHE_ALIGN, NULL);
2385         if (lov_oinfo_slab == NULL) {
2386                 lu_kmem_fini(lov_caches);
2387                 return -ENOMEM;
2388         }
2389
2390         rc = class_register_type(&lov_obd_ops, NULL, NULL,
2391 #ifndef HAVE_ONLY_PROCFS_SEQ
2392                                 NULL,
2393 #endif
2394                                 LUSTRE_LOV_NAME, &lov_device_type);
2395
2396         if (rc) {
2397                 kmem_cache_destroy(lov_oinfo_slab);
2398                 lu_kmem_fini(lov_caches);
2399         }
2400
2401         RETURN(rc);
2402 }
2403
2404 #ifdef __KERNEL__
2405 static void /*__exit*/ lov_exit(void)
2406 {
2407         class_unregister_type(LUSTRE_LOV_NAME);
2408         kmem_cache_destroy(lov_oinfo_slab);
2409         lu_kmem_fini(lov_caches);
2410 }
2411
2412 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2413 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2414 MODULE_LICENSE("GPL");
2415
2416 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
2417 #endif