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 <lustre_debug.h>
  58 #include <obd_class.h>
  59 #include <obd_lov.h>
  60 #include <obd_ost.h>
  61 #include <lprocfs_status.h>
  62 #include <lustre_param.h>
  63 #include <cl_object.h>
  64 #include <lclient.h>
  65 #include <lustre/ll_fiemap.h>
  66 #include <lustre_fid.h>
  67
  68 #include "lov_internal.h"
  69
  70 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  71    Any function that expects lov_tgts to remain stationary must take a ref. */
  72 static void lov_getref(struct obd_device *obd)
  73 {
  74         struct lov_obd *lov = &obd->u.lov;
  75
  76         /* nobody gets through here until lov_putref is done */
  77         mutex_lock(&lov->lov_lock);
  78         cfs_atomic_inc(&lov->lov_refcount);
  79         mutex_unlock(&lov->lov_lock);
  80         return;
  81 }
  82
  83 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  84
  85 static void lov_putref(struct obd_device *obd)
  86 {
  87         struct lov_obd *lov = &obd->u.lov;
  88
  89         mutex_lock(&lov->lov_lock);
  90         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  91         if (cfs_atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  92                 CFS_LIST_HEAD(kill);
  93                 int i;
  94                 struct lov_tgt_desc *tgt, *n;
  95                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  96                        lov->lov_death_row);
  97                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  98                         tgt = lov->lov_tgts[i];
  99
 100                         if (!tgt || !tgt->ltd_reap)
 101                                 continue;
 102                         cfs_list_add(&tgt->ltd_kill, &kill);
 103                         /* XXX - right now there is a dependency on ld_tgt_count
 104                          * being the maximum tgt index for computing the
 105                          * mds_max_easize. So we can't shrink it. */
 106                         lov_ost_pool_remove(&lov->lov_packed, i);
 107                         lov->lov_tgts[i] = NULL;
 108                         lov->lov_death_row--;
 109                 }
 110                 mutex_unlock(&lov->lov_lock);
 111
 112                 cfs_list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 113                         cfs_list_del(&tgt->ltd_kill);
 114                         /* Disconnect */
 115                         __lov_del_obd(obd, tgt);
 116                 }
 117         } else {
 118                 mutex_unlock(&lov->lov_lock);
 119         }
 120 }
 121
 122 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 123                               enum obd_notify_event ev);
 124 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 125                       enum obd_notify_event ev, void *data);
 126
 127 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 128                     struct obd_connect_data *data)
 129 {
 130         struct lov_obd *lov = &obd->u.lov;
 131         struct obd_uuid *tgt_uuid;
 132         struct obd_device *tgt_obd;
 133         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 134         struct obd_import *imp;
 135 #ifdef __KERNEL__
 136         struct proc_dir_entry *lov_proc_dir;
 137 #endif
 138         int rc;
 139         ENTRY;
 140
 141         if (!lov->lov_tgts[index])
 142                 RETURN(-EINVAL);
 143
 144         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 145         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 146
 147         if (!tgt_obd->obd_set_up) {
 148                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 149                 RETURN(-EINVAL);
 150         }
 151
 152         /* override the sp_me from lov */
 153         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 154
 155         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 156                 data->ocd_index = index;
 157
 158         /*
 159          * Divine LOV knows that OBDs under it are OSCs.
 160          */
 161         imp = tgt_obd->u.cli.cl_import;
 162
 163         if (activate) {
 164                 tgt_obd->obd_no_recov = 0;
 165                 /* FIXME this is probably supposed to be
 166                    ptlrpc_set_import_active.  Horrible naming. */
 167                 ptlrpc_activate_import(imp);
 168         }
 169
 170         rc = obd_register_observer(tgt_obd, obd);
 171         if (rc) {
 172                 CERROR("Target %s register_observer error %d\n",
 173                        obd_uuid2str(tgt_uuid), rc);
 174                 RETURN(rc);
 175         }
 176
 177
 178         if (imp->imp_invalid) {
 179                 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
 180                        "disabled\n", obd_uuid2str(tgt_uuid));
 181                 RETURN(0);
 182         }
 183
 184         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 185                          &lov_osc_uuid, data, NULL);
 186         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 187                 CERROR("Target %s connect error %d\n",
 188                        obd_uuid2str(tgt_uuid), rc);
 189                 RETURN(-ENODEV);
 190         }
 191
 192         lov->lov_tgts[index]->ltd_reap = 0;
 193
 194         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 195                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 196
 197 #ifdef __KERNEL__
 198         lov_proc_dir = obd->obd_proc_private;
 199         if (lov_proc_dir) {
 200                 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
 201                 struct proc_dir_entry *osc_symlink;
 202
 203                 LASSERT(osc_obd != NULL);
 204                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
 205                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 206
 207                 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name,
 208                                                   lov_proc_dir,
 209                                                   "../../../%s/%s",
 210                                                   osc_obd->obd_type->typ_name,
 211                                                   osc_obd->obd_name);
 212                 if (osc_symlink == NULL) {
 213                         CERROR("could not register LOV target "
 214                                 "/proc/fs/lustre/%s/%s/target_obds/%s.",
 215                                 obd->obd_type->typ_name, obd->obd_name,
 216                                 osc_obd->obd_name);
 217                         lprocfs_remove(&lov_proc_dir);
 218                         obd->obd_proc_private = NULL;
 219                 }
 220         }
 221 #endif
 222
 223         RETURN(0);
 224 }
 225
 226 static int lov_connect(const struct lu_env *env,
 227                        struct obd_export **exp, struct obd_device *obd,
 228                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 229                        void *localdata)
 230 {
 231         struct lov_obd *lov = &obd->u.lov;
 232         struct lov_tgt_desc *tgt;
 233         struct lustre_handle conn;
 234         int i, rc;
 235         ENTRY;
 236
 237         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 238
 239         rc = class_connect(&conn, obd, cluuid);
 240         if (rc)
 241                 RETURN(rc);
 242
 243         *exp = class_conn2export(&conn);
 244
 245         /* Why should there ever be more than 1 connect? */
 246         lov->lov_connects++;
 247         LASSERT(lov->lov_connects == 1);
 248
 249         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 250         if (data)
 251                 lov->lov_ocd = *data;
 252
 253         obd_getref(obd);
 254         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 255                 tgt = lov->lov_tgts[i];
 256                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 257                         continue;
 258                 /* Flags will be lowest common denominator */
 259                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 260                 if (rc) {
 261                         CERROR("%s: lov connect tgt %d failed: %d\n",
 262                                obd->obd_name, i, rc);
 263                         continue;
 264                 }
 265                 /* connect to administrative disabled ost */
 266                 if (!lov->lov_tgts[i]->ltd_exp)
 267                         continue;
 268
 269                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 270                                 OBD_NOTIFY_CONNECT, (void *)&i);
 271                 if (rc) {
 272                         CERROR("%s error sending notify %d\n",
 273                                obd->obd_name, rc);
 274                 }
 275         }
 276         obd_putref(obd);
 277
 278         RETURN(0);
 279 }
 280
 281 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 282 {
 283         struct proc_dir_entry *lov_proc_dir;
 284         struct lov_obd *lov = &obd->u.lov;
 285         struct obd_device *osc_obd;
 286         int rc;
 287         ENTRY;
 288
 289         osc_obd = class_exp2obd(tgt->ltd_exp);
 290         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 291                obd->obd_name, osc_obd->obd_name);
 292
 293         if (tgt->ltd_active) {
 294                 tgt->ltd_active = 0;
 295                 lov->desc.ld_active_tgt_count--;
 296                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 297         }
 298
 299         lov_proc_dir = obd->obd_proc_private;
 300         if (lov_proc_dir)
 301                 lprocfs_remove_proc_entry(osc_obd->obd_name, lov_proc_dir);
 302
 303         if (osc_obd) {
 304                 /* Pass it on to our clients.
 305                  * XXX This should be an argument to disconnect,
 306                  * XXX not a back-door flag on the OBD.  Ah well.
 307                  */
 308                 osc_obd->obd_force = obd->obd_force;
 309                 osc_obd->obd_fail = obd->obd_fail;
 310                 osc_obd->obd_no_recov = obd->obd_no_recov;
 311         }
 312
 313         obd_register_observer(osc_obd, NULL);
 314
 315         rc = obd_disconnect(tgt->ltd_exp);
 316         if (rc) {
 317                 CERROR("Target %s disconnect error %d\n",
 318                        tgt->ltd_uuid.uuid, rc);
 319                 rc = 0;
 320         }
 321
 322         tgt->ltd_exp = NULL;
 323         RETURN(0);
 324 }
 325
 326 static int lov_disconnect(struct obd_export *exp)
 327 {
 328         struct obd_device *obd = class_exp2obd(exp);
 329         struct lov_obd *lov = &obd->u.lov;
 330         int i, rc;
 331         ENTRY;
 332
 333         if (!lov->lov_tgts)
 334                 goto out;
 335
 336         /* Only disconnect the underlying layers on the final disconnect. */
 337         lov->lov_connects--;
 338         if (lov->lov_connects != 0) {
 339                 /* why should there be more than 1 connect? */
 340                 CERROR("disconnect #%d\n", lov->lov_connects);
 341                 goto out;
 342         }
 343
 344         /* Let's hold another reference so lov_del_obd doesn't spin through
 345            putref every time */
 346         obd_getref(obd);
 347
 348         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 349                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 350                         /* Disconnection is the last we know about an obd */
 351                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
 352                 }
 353         }
 354         obd_putref(obd);
 355
 356 out:
 357         rc = class_disconnect(exp); /* bz 9811 */
 358         RETURN(rc);
 359 }
 360
 361 /* Error codes:
 362  *
 363  *  -EINVAL  : UUID can't be found in the LOV's target list
 364  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 365  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 366  *  any >= 0 : is log target index
 367  */
 368 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 369                               enum obd_notify_event ev)
 370 {
 371         struct lov_obd *lov = &obd->u.lov;
 372         struct lov_tgt_desc *tgt;
 373         int index, activate, active;
 374         ENTRY;
 375
 376         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 377                lov, uuid->uuid, ev);
 378
 379         obd_getref(obd);
 380         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 381                 tgt = lov->lov_tgts[index];
 382                 if (!tgt)
 383                         continue;
 384                 /*
 385                  * LU-642, initially inactive OSC could miss the obd_connect,
 386                  * we make up for it here.
 387                  */
 388                 if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
 389                     obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 390                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 391
 392                         obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 393                                     &lov_osc_uuid, &lov->lov_ocd, NULL);
 394                 }
 395                 if (!tgt->ltd_exp)
 396                         continue;
 397
 398                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 399                        index, obd_uuid2str(&tgt->ltd_uuid),
 400                        tgt->ltd_exp->exp_handle.h_cookie);
 401                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 402                         break;
 403         }
 404
 405         if (index == lov->desc.ld_tgt_count)
 406                 GOTO(out, index = -EINVAL);
 407
 408         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 409                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 410
 411                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 412                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 413                                uuid->uuid, activate ? "" : "de");
 414                 } else {
 415                         lov->lov_tgts[index]->ltd_activate = activate;
 416                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 417                                activate ? "" : "de", obd_uuid2str(uuid));
 418                 }
 419
 420         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 421                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 422
 423                 if (lov->lov_tgts[index]->ltd_active == active) {
 424                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 425                                uuid->uuid, active ? "" : "in");
 426                         GOTO(out, index);
 427                 } else {
 428                         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 429                                obd_uuid2str(uuid), active ? "" : "in");
 430                 }
 431
 432                 lov->lov_tgts[index]->ltd_active = active;
 433                 if (active) {
 434                         lov->desc.ld_active_tgt_count++;
 435                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 436                 } else {
 437                         lov->desc.ld_active_tgt_count--;
 438                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 439                 }
 440         } else {
 441                 CERROR("Unknown event(%d) for uuid %s", ev, uuid->uuid);
 442         }
 443
 444  out:
 445         obd_putref(obd);
 446         RETURN(index);
 447 }
 448
 449 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 450                       enum obd_notify_event ev, void *data)
 451 {
 452         int rc = 0;
 453         struct lov_obd *lov = &obd->u.lov;
 454         ENTRY;
 455
 456         down_read(&lov->lov_notify_lock);
 457         if (!lov->lov_connects) {
 458                 up_read(&lov->lov_notify_lock);
 459                 RETURN(rc);
 460         }
 461
 462         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 463             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 464                 struct obd_uuid *uuid;
 465
 466                 LASSERT(watched);
 467
 468                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 469                         up_read(&lov->lov_notify_lock);
 470                         CERROR("unexpected notification of %s %s!\n",
 471                                watched->obd_type->typ_name,
 472                                watched->obd_name);
 473                         RETURN(-EINVAL);
 474                 }
 475                 uuid = &watched->u.cli.cl_target_uuid;
 476
 477                 /* Set OSC as active before notifying the observer, so the
 478                  * observer can use the OSC normally.
 479                  */
 480                 rc = lov_set_osc_active(obd, uuid, ev);
 481                 if (rc < 0) {
 482                         up_read(&lov->lov_notify_lock);
 483                         CERROR("event(%d) of %s failed: %d\n", ev,
 484                                obd_uuid2str(uuid), rc);
 485                         RETURN(rc);
 486                 }
 487                 /* active event should be pass lov target index as data */
 488                 data = &rc;
 489         }
 490
 491         /* Pass the notification up the chain. */
 492         if (watched) {
 493                 rc = obd_notify_observer(obd, watched, ev, data);
 494         } else {
 495                 /* NULL watched means all osc's in the lov (only for syncs) */
 496                 /* sync event should be send lov idx as data */
 497                 struct lov_obd *lov = &obd->u.lov;
 498                 int i, is_sync;
 499
 500                 data = &i;
 501                 is_sync = (ev == OBD_NOTIFY_SYNC) ||
 502                           (ev == OBD_NOTIFY_SYNC_NONBLOCK);
 503
 504                 obd_getref(obd);
 505                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 506                         if (!lov->lov_tgts[i])
 507                                 continue;
 508
 509                         /* don't send sync event if target not
 510                          * connected/activated */
 511                         if (is_sync &&  !lov->lov_tgts[i]->ltd_active)
 512                                 continue;
 513
 514                         rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
 515                                                  ev, data);
 516                         if (rc) {
 517                                 CERROR("%s: notify %s of %s failed %d\n",
 518                                        obd->obd_name,
 519                                        obd->obd_observer->obd_name,
 520                                        lov->lov_tgts[i]->ltd_obd->obd_name,
 521                                        rc);
 522                         }
 523                 }
 524                 obd_putref(obd);
 525         }
 526
 527         up_read(&lov->lov_notify_lock);
 528         RETURN(rc);
 529 }
 530
 531 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 532                           __u32 index, int gen, int active)
 533 {
 534         struct lov_obd *lov = &obd->u.lov;
 535         struct lov_tgt_desc *tgt;
 536         struct obd_device *tgt_obd;
 537         int rc;
 538         ENTRY;
 539
 540         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 541                uuidp->uuid, index, gen, active);
 542
 543         if (gen <= 0) {
 544                 CERROR("request to add OBD %s with invalid generation: %d\n",
 545                        uuidp->uuid, gen);
 546                 RETURN(-EINVAL);
 547         }
 548
 549         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 550                                         &obd->obd_uuid);
 551         if (tgt_obd == NULL)
 552                 RETURN(-EINVAL);
 553
 554         mutex_lock(&lov->lov_lock);
 555
 556         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 557                 tgt = lov->lov_tgts[index];
 558                 CERROR("UUID %s already assigned at LOV target index %d\n",
 559                        obd_uuid2str(&tgt->ltd_uuid), index);
 560                 mutex_unlock(&lov->lov_lock);
 561                 RETURN(-EEXIST);
 562         }
 563
 564         if (index >= lov->lov_tgt_size) {
 565                 /* We need to reallocate the lov target array. */
 566                 struct lov_tgt_desc **newtgts, **old = NULL;
 567                 __u32 newsize, oldsize = 0;
 568
 569                 newsize = max(lov->lov_tgt_size, (__u32)2);
 570                 while (newsize < index + 1)
 571                         newsize = newsize << 1;
 572                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 573                 if (newtgts == NULL) {
 574                         mutex_unlock(&lov->lov_lock);
 575                         RETURN(-ENOMEM);
 576                 }
 577
 578                 if (lov->lov_tgt_size) {
 579                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 580                                lov->lov_tgt_size);
 581                         old = lov->lov_tgts;
 582                         oldsize = lov->lov_tgt_size;
 583                 }
 584
 585                 lov->lov_tgts = newtgts;
 586                 lov->lov_tgt_size = newsize;
 587                 smp_rmb();
 588                 if (old)
 589                         OBD_FREE(old, sizeof(*old) * oldsize);
 590
 591                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 592                        lov->lov_tgts, lov->lov_tgt_size);
 593         }
 594
 595         OBD_ALLOC_PTR(tgt);
 596         if (!tgt) {
 597                 mutex_unlock(&lov->lov_lock);
 598                 RETURN(-ENOMEM);
 599         }
 600
 601         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 602         if (rc) {
 603                 mutex_unlock(&lov->lov_lock);
 604                 OBD_FREE_PTR(tgt);
 605                 RETURN(rc);
 606         }
 607
 608         tgt->ltd_uuid = *uuidp;
 609         tgt->ltd_obd = tgt_obd;
 610         /* XXX - add a sanity check on the generation number. */
 611         tgt->ltd_gen = gen;
 612         tgt->ltd_index = index;
 613         tgt->ltd_activate = active;
 614         lov->lov_tgts[index] = tgt;
 615         if (index >= lov->desc.ld_tgt_count)
 616                 lov->desc.ld_tgt_count = index + 1;
 617
 618         mutex_unlock(&lov->lov_lock);
 619
 620         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 621                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 622
 623         rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
 624
 625         if (lov->lov_connects == 0) {
 626                 /* lov_connect hasn't been called yet. We'll do the
 627                    lov_connect_obd on this target when that fn first runs,
 628                    because we don't know the connect flags yet. */
 629                 RETURN(0);
 630         }
 631
 632         obd_getref(obd);
 633
 634         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 635         if (rc)
 636                 GOTO(out, rc);
 637
 638         /* connect to administrative disabled ost */
 639         if (!tgt->ltd_exp)
 640                 GOTO(out, rc = 0);
 641
 642         if (lov->lov_cache != NULL) {
 643                 rc = obd_set_info_async(NULL, tgt->ltd_exp,
 644                                 sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 645                                 sizeof(struct cl_client_cache), lov->lov_cache,
 646                                 NULL);
 647                 if (rc < 0)
 648                         GOTO(out, rc);
 649         }
 650
 651         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 652                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
 653                         (void *)&index);
 654
 655 out:
 656         if (rc) {
 657                 CERROR("add failed (%d), deleting %s\n", rc,
 658                        obd_uuid2str(&tgt->ltd_uuid));
 659                 lov_del_target(obd, index, 0, 0);
 660         }
 661         obd_putref(obd);
 662         RETURN(rc);
 663 }
 664
 665 /* Schedule a target for deletion */
 666 int lov_del_target(struct obd_device *obd, __u32 index,
 667                    struct obd_uuid *uuidp, int gen)
 668 {
 669         struct lov_obd *lov = &obd->u.lov;
 670         int count = lov->desc.ld_tgt_count;
 671         int rc = 0;
 672         ENTRY;
 673
 674         if (index >= count) {
 675                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 676                        index, count);
 677                 RETURN(-EINVAL);
 678         }
 679
 680         /* to make sure there's no ongoing lov_notify() now */
 681         down_write(&lov->lov_notify_lock);
 682         obd_getref(obd);
 683
 684         if (!lov->lov_tgts[index]) {
 685                 CERROR("LOV target at index %d is not setup.\n", index);
 686                 GOTO(out, rc = -EINVAL);
 687         }
 688
 689         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 690                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 691                        lov_uuid2str(lov, index), index,
 692                        obd_uuid2str(uuidp));
 693                 GOTO(out, rc = -EINVAL);
 694         }
 695
 696         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 697                lov_uuid2str(lov, index), index,
 698                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 699                lov->lov_tgts[index]->ltd_active);
 700
 701         lov->lov_tgts[index]->ltd_reap = 1;
 702         lov->lov_death_row++;
 703         /* we really delete it from obd_putref */
 704 out:
 705         obd_putref(obd);
 706         up_write(&lov->lov_notify_lock);
 707
 708         RETURN(rc);
 709 }
 710
 711 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 712 {
 713         struct obd_device *osc_obd;
 714
 715         LASSERT(tgt);
 716         LASSERT(tgt->ltd_reap);
 717
 718         osc_obd = class_exp2obd(tgt->ltd_exp);
 719
 720         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 721                tgt->ltd_uuid.uuid,
 722                osc_obd ? osc_obd->obd_name : "<no obd>");
 723
 724         if (tgt->ltd_exp)
 725                 lov_disconnect_obd(obd, tgt);
 726
 727         OBD_FREE_PTR(tgt);
 728
 729         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 730            do it ourselves. And we can't do it from lov_cleanup,
 731            because we just lost our only reference to it. */
 732         if (osc_obd)
 733                 class_manual_cleanup(osc_obd);
 734 }
 735
 736 void lov_fix_desc_stripe_size(__u64 *val)
 737 {
 738         if (*val < LOV_MIN_STRIPE_SIZE) {
 739                 if (*val != 0)
 740                         LCONSOLE_INFO("Increasing default stripe size to "
 741                                       "minimum %u\n",
 742                                       LOV_DEFAULT_STRIPE_SIZE);
 743                 *val = LOV_DEFAULT_STRIPE_SIZE;
 744         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 745                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 746                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 747                               "multiple of %u)\n",
 748                               *val, LOV_MIN_STRIPE_SIZE);
 749         }
 750 }
 751
 752 void lov_fix_desc_stripe_count(__u32 *val)
 753 {
 754         if (*val == 0)
 755                 *val = 1;
 756 }
 757
 758 void lov_fix_desc_pattern(__u32 *val)
 759 {
 760         /* from lov_setstripe */
 761         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 762                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 763                 *val = 0;
 764         }
 765 }
 766
 767 void lov_fix_desc_qos_maxage(__u32 *val)
 768 {
 769         /* fix qos_maxage */
 770         if (*val == 0)
 771                 *val = QOS_DEFAULT_MAXAGE;
 772 }
 773
 774 void lov_fix_desc(struct lov_desc *desc)
 775 {
 776         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 777         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 778         lov_fix_desc_pattern(&desc->ld_pattern);
 779         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 780 }
 781
 782 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 783 {
 784         struct lov_desc *desc;
 785         struct lov_obd *lov = &obd->u.lov;
 786         int rc;
 787         ENTRY;
 788
 789         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 790                 CERROR("LOV setup requires a descriptor\n");
 791                 RETURN(-EINVAL);
 792         }
 793
 794         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 795
 796         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 797                 CERROR("descriptor size wrong: %d > %d\n",
 798                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 799                 RETURN(-EINVAL);
 800         }
 801
 802         if (desc->ld_magic != LOV_DESC_MAGIC) {
 803                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 804                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 805                                    obd->obd_name, desc);
 806                             lustre_swab_lov_desc(desc);
 807                 } else {
 808                         CERROR("%s: Bad lov desc magic: %#x\n",
 809                                obd->obd_name, desc->ld_magic);
 810                         RETURN(-EINVAL);
 811                 }
 812         }
 813
 814         lov_fix_desc(desc);
 815
 816         desc->ld_active_tgt_count = 0;
 817         lov->desc = *desc;
 818         lov->lov_tgt_size = 0;
 819
 820         mutex_init(&lov->lov_lock);
 821         cfs_atomic_set(&lov->lov_refcount, 0);
 822         lov->lov_sp_me = LUSTRE_SP_CLI;
 823
 824         init_rwsem(&lov->lov_notify_lock);
 825
 826         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 827                                                    HASH_POOLS_MAX_BITS,
 828                                                    HASH_POOLS_BKT_BITS, 0,
 829                                                    CFS_HASH_MIN_THETA,
 830                                                    CFS_HASH_MAX_THETA,
 831                                                    &pool_hash_operations,
 832                                                    CFS_HASH_DEFAULT);
 833         CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
 834         lov->lov_pool_count = 0;
 835         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 836         if (rc)
 837                 GOTO(out, rc);
 838
 839 #ifdef LPROCFS
 840         obd->obd_vars = lprocfs_lov_obd_vars;
 841         lprocfs_seq_obd_setup(obd);
 842         rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", 0444,
 843                                 &lov_proc_target_fops, obd);
 844         if (rc)
 845                 CWARN("Error adding the target_obd file\n");
 846
 847         lov->lov_pool_proc_entry = lprocfs_seq_register("pools",
 848                                                         obd->obd_proc_entry,
 849                                                         NULL, NULL);
 850 #endif
 851         RETURN(0);
 852
 853 out:
 854         return rc;
 855 }
 856
 857 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 858 {
 859         int rc = 0;
 860         struct lov_obd *lov = &obd->u.lov;
 861
 862         ENTRY;
 863
 864         switch (stage) {
 865         case OBD_CLEANUP_EARLY: {
 866                 int i;
 867                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 868                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 869                                 continue;
 870                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 871                                        OBD_CLEANUP_EARLY);
 872                 }
 873                 break;
 874         }
 875         default:
 876                 break;
 877         }
 878
 879         RETURN(rc);
 880 }
 881
 882 static int lov_cleanup(struct obd_device *obd)
 883 {
 884         struct lov_obd *lov = &obd->u.lov;
 885         cfs_list_t *pos, *tmp;
 886         struct pool_desc *pool;
 887         ENTRY;
 888
 889         cfs_list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 890                 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
 891                 /* free pool structs */
 892                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 893                 /* In the function below, .hs_keycmp resolves to
 894                  * pool_hashkey_keycmp() */
 895                 /* coverity[overrun-buffer-val] */
 896                 lov_pool_del(obd, pool->pool_name);
 897         }
 898         cfs_hash_putref(lov->lov_pools_hash_body);
 899         lov_ost_pool_free(&lov->lov_packed);
 900
 901         lprocfs_obd_cleanup(obd);
 902         if (lov->lov_tgts) {
 903                 int i;
 904                 obd_getref(obd);
 905                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 906                         if (!lov->lov_tgts[i])
 907                                 continue;
 908
 909                         /* Inactive targets may never have connected */
 910                         if (lov->lov_tgts[i]->ltd_active ||
 911                             cfs_atomic_read(&lov->lov_refcount))
 912                             /* We should never get here - these
 913                                should have been removed in the
 914                              disconnect. */
 915                                 CERROR("lov tgt %d not cleaned!"
 916                                        " deathrow=%d, lovrc=%d\n",
 917                                        i, lov->lov_death_row,
 918                                        cfs_atomic_read(&lov->lov_refcount));
 919                         lov_del_target(obd, i, 0, 0);
 920                 }
 921                 obd_putref(obd);
 922                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 923                          lov->lov_tgt_size);
 924                 lov->lov_tgt_size = 0;
 925         }
 926         RETURN(0);
 927 }
 928
 929 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 930                             __u32 *indexp, int *genp)
 931 {
 932         struct obd_uuid obd_uuid;
 933         int cmd;
 934         int rc = 0;
 935         ENTRY;
 936
 937         switch(cmd = lcfg->lcfg_command) {
 938         case LCFG_LOV_ADD_OBD:
 939         case LCFG_LOV_ADD_INA:
 940         case LCFG_LOV_DEL_OBD: {
 941                 __u32 index;
 942                 int gen;
 943                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 944                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 945                         GOTO(out, rc = -EINVAL);
 946
 947                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 948
 949                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
 950                         GOTO(out, rc = -EINVAL);
 951                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
 952                         GOTO(out, rc = -EINVAL);
 953                 index = *indexp;
 954                 gen = *genp;
 955                 if (cmd == LCFG_LOV_ADD_OBD)
 956                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 957                 else if (cmd == LCFG_LOV_ADD_INA)
 958                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 959                 else
 960                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 961                 GOTO(out, rc);
 962         }
 963         case LCFG_PARAM: {
 964                 struct lov_desc *desc = &(obd->u.lov.desc);
 965
 966                 if (!desc)
 967                         GOTO(out, rc = -EINVAL);
 968
 969                 rc = class_process_proc_seq_param(PARAM_LOV, obd->obd_vars,
 970                                                   lcfg, obd);
 971                 if (rc > 0)
 972                         rc = 0;
 973                 GOTO(out, rc);
 974         }
 975         case LCFG_POOL_NEW:
 976         case LCFG_POOL_ADD:
 977         case LCFG_POOL_DEL:
 978         case LCFG_POOL_REM:
 979                 GOTO(out, rc);
 980
 981         default: {
 982                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 983                 GOTO(out, rc = -EINVAL);
 984
 985         }
 986         }
 987 out:
 988         RETURN(rc);
 989 }
 990
 991 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
 992                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
 993 {
 994         struct lov_stripe_md *obj_mdp, *lsm;
 995         struct lov_obd *lov = &exp->exp_obd->u.lov;
 996         unsigned ost_idx;
 997         int rc, i;
 998         ENTRY;
 999
1000         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1001                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1002
1003         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1004         if (obj_mdp == NULL)
1005                 RETURN(-ENOMEM);
1006
1007         ost_idx = src_oa->o_nlink;
1008         lsm = *ea;
1009         if (lsm == NULL)
1010                 GOTO(out, rc = -EINVAL);
1011         if (ost_idx >= lov->desc.ld_tgt_count ||
1012             !lov->lov_tgts[ost_idx])
1013                 GOTO(out, rc = -EINVAL);
1014
1015         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1016                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1017                         if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) !=
1018                                         ostid_id(&src_oa->o_oi))
1019                                 GOTO(out, rc = -EINVAL);
1020                         break;
1021                 }
1022         }
1023         if (i == lsm->lsm_stripe_count)
1024                 GOTO(out, rc = -EINVAL);
1025
1026         rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp,
1027                         src_oa, &obj_mdp, oti);
1028 out:
1029         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1030         RETURN(rc);
1031 }
1032
1033 /* the LOV expects oa->o_id to be set to the LOV object id */
1034 static int lov_create(const struct lu_env *env, struct obd_export *exp,
1035                       struct obdo *src_oa, struct lov_stripe_md **ea,
1036                       struct obd_trans_info *oti)
1037 {
1038         struct lov_obd *lov;
1039         int rc = 0;
1040         ENTRY;
1041
1042         LASSERT(ea != NULL);
1043         if (exp == NULL)
1044                 RETURN(-EINVAL);
1045
1046         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1047             src_oa->o_flags == OBD_FL_DELORPHAN) {
1048                 /* should be used with LOV anymore */
1049                 LBUG();
1050         }
1051
1052         lov = &exp->exp_obd->u.lov;
1053         if (!lov->desc.ld_active_tgt_count)
1054                 RETURN(-EIO);
1055
1056         obd_getref(exp->exp_obd);
1057         /* Recreate a specific object id at the given OST index */
1058         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1059             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1060                  rc = lov_recreate(exp, src_oa, ea, oti);
1061         }
1062
1063         obd_putref(exp->exp_obd);
1064         RETURN(rc);
1065 }
1066
1067 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1068 do {                                                                            \
1069         LASSERT((lsmp) != NULL);                                                \
1070         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                          \
1071                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                            \
1072                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);              \
1073 } while (0)
1074
1075 static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
1076                        struct obdo *oa, struct lov_stripe_md *lsm,
1077                        struct obd_trans_info *oti, struct obd_export *md_exp,
1078                        void *capa)
1079 {
1080         struct lov_request_set *set;
1081         struct obd_info oinfo;
1082         struct lov_request *req;
1083         cfs_list_t *pos;
1084         struct lov_obd *lov;
1085         int rc = 0, err = 0;
1086         ENTRY;
1087
1088         ASSERT_LSM_MAGIC(lsm);
1089
1090         if (!exp || !exp->exp_obd)
1091                 RETURN(-ENODEV);
1092
1093         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1094                 LASSERT(oti);
1095                 LASSERT(oti->oti_logcookies);
1096         }
1097
1098         lov = &exp->exp_obd->u.lov;
1099         obd_getref(exp->exp_obd);
1100         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1101         if (rc)
1102                 GOTO(out, rc);
1103
1104         cfs_list_for_each (pos, &set->set_list) {
1105                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1106
1107                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1108                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1109
1110                 err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1111                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1112                 err = lov_update_common_set(set, req, err);
1113                 if (err) {
1114                         CERROR("%s: destroying objid "DOSTID" subobj "
1115                                DOSTID" on OST idx %d: rc = %d\n",
1116                                exp->exp_obd->obd_name, POSTID(&oa->o_oi),
1117                                POSTID(&req->rq_oi.oi_oa->o_oi),
1118                                req->rq_idx, err);
1119                         if (!rc)
1120                                 rc = err;
1121                 }
1122         }
1123
1124         if (rc == 0) {
1125                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1126                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1127         }
1128         err = lov_fini_destroy_set(set);
1129 out:
1130         obd_putref(exp->exp_obd);
1131         RETURN(rc ? rc : err);
1132 }
1133
1134 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1135                                  void *data, int rc)
1136 {
1137         struct lov_request_set *lovset = (struct lov_request_set *)data;
1138         int err;
1139         ENTRY;
1140
1141         /* don't do attribute merge if this aysnc op failed */
1142         if (rc)
1143                 cfs_atomic_set(&lovset->set_completes, 0);
1144         err = lov_fini_getattr_set(lovset);
1145         RETURN(rc ? rc : err);
1146 }
1147
1148 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1149                               struct ptlrpc_request_set *rqset)
1150 {
1151         struct lov_request_set *lovset;
1152         struct lov_obd *lov;
1153         cfs_list_t *pos;
1154         struct lov_request *req;
1155         int rc = 0, err;
1156         ENTRY;
1157
1158         LASSERT(oinfo);
1159         ASSERT_LSM_MAGIC(oinfo->oi_md);
1160
1161         if (!exp || !exp->exp_obd)
1162                 RETURN(-ENODEV);
1163
1164         lov = &exp->exp_obd->u.lov;
1165
1166         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1167         if (rc)
1168                 RETURN(rc);
1169
1170         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1171                POSTID(&oinfo->oi_md->lsm_oi), oinfo->oi_md->lsm_stripe_count,
1172                oinfo->oi_md->lsm_stripe_size);
1173
1174         cfs_list_for_each(pos, &lovset->set_list) {
1175                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1176
1177                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1178                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1179                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1180                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1181                                        &req->rq_oi, rqset);
1182                 if (rc) {
1183                         CERROR("%s: getattr objid "DOSTID" subobj"
1184                                DOSTID" on OST idx %d: rc = %d\n",
1185                                exp->exp_obd->obd_name,
1186                                POSTID(&oinfo->oi_oa->o_oi),
1187                                POSTID(&req->rq_oi.oi_oa->o_oi),
1188                                req->rq_idx, rc);
1189                         GOTO(out, rc);
1190                 }
1191         }
1192
1193         if (!cfs_list_empty(&rqset->set_requests)) {
1194                 LASSERT(rc == 0);
1195                 LASSERT (rqset->set_interpret == NULL);
1196                 rqset->set_interpret = lov_getattr_interpret;
1197                 rqset->set_arg = (void *)lovset;
1198                 RETURN(rc);
1199         }
1200 out:
1201         if (rc)
1202                 cfs_atomic_set(&lovset->set_completes, 0);
1203         err = lov_fini_getattr_set(lovset);
1204         RETURN(rc ? rc : err);
1205 }
1206
1207 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1208                                  void *data, int rc)
1209 {
1210         struct lov_request_set *lovset = (struct lov_request_set *)data;
1211         int err;
1212         ENTRY;
1213
1214         if (rc)
1215                 cfs_atomic_set(&lovset->set_completes, 0);
1216         err = lov_fini_setattr_set(lovset);
1217         RETURN(rc ? rc : err);
1218 }
1219
1220 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1221    needed. Otherwise, a client is waiting for responses. */
1222 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1223                              struct obd_trans_info *oti,
1224                              struct ptlrpc_request_set *rqset)
1225 {
1226         struct lov_request_set *set;
1227         struct lov_request *req;
1228         cfs_list_t *pos;
1229         struct lov_obd *lov;
1230         int rc = 0;
1231         ENTRY;
1232
1233         LASSERT(oinfo);
1234         ASSERT_LSM_MAGIC(oinfo->oi_md);
1235         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1236                 LASSERT(oti);
1237                 LASSERT(oti->oti_logcookies);
1238         }
1239
1240         if (!exp || !exp->exp_obd)
1241                 RETURN(-ENODEV);
1242
1243         lov = &exp->exp_obd->u.lov;
1244         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1245         if (rc)
1246                 RETURN(rc);
1247
1248         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1249                POSTID(&oinfo->oi_md->lsm_oi),
1250                oinfo->oi_md->lsm_stripe_count,
1251                oinfo->oi_md->lsm_stripe_size);
1252
1253         cfs_list_for_each(pos, &set->set_list) {
1254                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1255
1256                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1257                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1258
1259                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1260                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1261                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1262
1263                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1264                                        &req->rq_oi, oti, rqset);
1265                 if (rc) {
1266                         CERROR("error: setattr objid "DOSTID" subobj"
1267                                DOSTID" on OST idx %d: rc = %d\n",
1268                                POSTID(&set->set_oi->oi_oa->o_oi),
1269                                POSTID(&req->rq_oi.oi_oa->o_oi),
1270                                req->rq_idx, rc);
1271                         break;
1272                 }
1273         }
1274
1275         /* If we are not waiting for responses on async requests, return. */
1276         if (rc || !rqset || cfs_list_empty(&rqset->set_requests)) {
1277                 int err;
1278                 if (rc)
1279                         cfs_atomic_set(&set->set_completes, 0);
1280                 err = lov_fini_setattr_set(set);
1281                 RETURN(rc ? rc : err);
1282         }
1283
1284         LASSERT(rqset->set_interpret == NULL);
1285         rqset->set_interpret = lov_setattr_interpret;
1286         rqset->set_arg = (void *)set;
1287
1288         RETURN(0);
1289 }
1290
1291 static int lov_change_cbdata(struct obd_export *exp,
1292                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1293                              void *data)
1294 {
1295         struct lov_obd *lov;
1296         int rc = 0, i;
1297         ENTRY;
1298
1299         ASSERT_LSM_MAGIC(lsm);
1300
1301         if (!exp || !exp->exp_obd)
1302                 RETURN(-ENODEV);
1303
1304         lov = &exp->exp_obd->u.lov;
1305         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1306                 struct lov_stripe_md submd;
1307                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1308
1309                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1310                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1311                         continue;
1312                 }
1313
1314                 submd.lsm_oi = loi->loi_oi;
1315                 submd.lsm_stripe_count = 0;
1316                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1317                                        &submd, it, data);
1318         }
1319         RETURN(rc);
1320 }
1321
1322 /* find any ldlm lock of the inode in lov
1323  * return 0    not find
1324  *        1    find one
1325  *      < 0    error */
1326 static int lov_find_cbdata(struct obd_export *exp,
1327                            struct lov_stripe_md *lsm, ldlm_iterator_t it,
1328                            void *data)
1329 {
1330         struct lov_obd *lov;
1331         int rc = 0, i;
1332         ENTRY;
1333
1334         ASSERT_LSM_MAGIC(lsm);
1335
1336         if (!exp || !exp->exp_obd)
1337                 RETURN(-ENODEV);
1338
1339         lov = &exp->exp_obd->u.lov;
1340         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1341                 struct lov_stripe_md submd;
1342                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1343
1344                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1345                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1346                         continue;
1347                 }
1348                 submd.lsm_oi = loi->loi_oi;
1349                 submd.lsm_stripe_count = 0;
1350                 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1351                                      &submd, it, data);
1352                 if (rc != 0)
1353                         RETURN(rc);
1354         }
1355         RETURN(rc);
1356 }
1357
1358 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1359 {
1360         struct lov_request_set *lovset = (struct lov_request_set *)data;
1361         int err;
1362         ENTRY;
1363
1364         if (rc)
1365                 cfs_atomic_set(&lovset->set_completes, 0);
1366
1367         err = lov_fini_statfs_set(lovset);
1368         RETURN(rc ? rc : err);
1369 }
1370
1371 static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
1372                             __u64 max_age, struct ptlrpc_request_set *rqset)
1373 {
1374         struct obd_device      *obd = class_exp2obd(exp);
1375         struct lov_request_set *set;
1376         struct lov_request *req;
1377         cfs_list_t *pos;
1378         struct lov_obd *lov;
1379         int rc = 0;
1380         ENTRY;
1381
1382         LASSERT(oinfo != NULL);
1383         LASSERT(oinfo->oi_osfs != NULL);
1384
1385         lov = &obd->u.lov;
1386         rc = lov_prep_statfs_set(obd, oinfo, &set);
1387         if (rc)
1388                 RETURN(rc);
1389
1390         cfs_list_for_each (pos, &set->set_list) {
1391                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1392                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1393                                       &req->rq_oi, max_age, rqset);
1394                 if (rc)
1395                         break;
1396         }
1397
1398         if (rc || cfs_list_empty(&rqset->set_requests)) {
1399                 int err;
1400                 if (rc)
1401                         cfs_atomic_set(&set->set_completes, 0);
1402                 err = lov_fini_statfs_set(set);
1403                 RETURN(rc ? rc : err);
1404         }
1405
1406         LASSERT(rqset->set_interpret == NULL);
1407         rqset->set_interpret = lov_statfs_interpret;
1408         rqset->set_arg = (void *)set;
1409         RETURN(0);
1410 }
1411
1412 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
1413                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1414 {
1415         struct ptlrpc_request_set *set = NULL;
1416         struct obd_info oinfo = { { { 0 } } };
1417         int rc = 0;
1418         ENTRY;
1419
1420
1421         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1422          * statfs requests */
1423         set = ptlrpc_prep_set();
1424         if (set == NULL)
1425                 RETURN(-ENOMEM);
1426
1427         oinfo.oi_osfs = osfs;
1428         oinfo.oi_flags = flags;
1429         rc = lov_statfs_async(exp, &oinfo, max_age, set);
1430         if (rc == 0)
1431                 rc = ptlrpc_set_wait(set);
1432         ptlrpc_set_destroy(set);
1433
1434         RETURN(rc);
1435 }
1436
1437 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1438                          void *karg, void *uarg)
1439 {
1440         struct obd_device *obddev = class_exp2obd(exp);
1441         struct lov_obd *lov = &obddev->u.lov;
1442         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1443         struct obd_uuid *uuidp;
1444         ENTRY;
1445
1446         switch (cmd) {
1447         case IOC_OBD_STATFS: {
1448                 struct obd_ioctl_data *data = karg;
1449                 struct obd_device *osc_obd;
1450                 struct obd_statfs stat_buf = {0};
1451                 __u32 index;
1452                 __u32 flags;
1453
1454                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1455                 if ((index >= count))
1456                         RETURN(-ENODEV);
1457
1458                 if (!lov->lov_tgts[index])
1459                         /* Try again with the next index */
1460                         RETURN(-EAGAIN);
1461                 if (!lov->lov_tgts[index]->ltd_active)
1462                         RETURN(-ENODATA);
1463
1464                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1465                 if (!osc_obd)
1466                         RETURN(-EINVAL);
1467
1468                 /* copy UUID */
1469                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1470                                  min((int)data->ioc_plen2,
1471                                      (int)sizeof(struct obd_uuid))))
1472                         RETURN(-EFAULT);
1473
1474                 flags = uarg ? *(__u32*)uarg : 0;
1475                 /* got statfs data */
1476                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1477                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1478                                 flags);
1479                 if (rc)
1480                         RETURN(rc);
1481                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1482                                      min((int) data->ioc_plen1,
1483                                          (int) sizeof(stat_buf))))
1484                         RETURN(-EFAULT);
1485                 break;
1486         }
1487         case OBD_IOC_LOV_GET_CONFIG: {
1488                 struct obd_ioctl_data *data;
1489                 struct lov_desc *desc;
1490                 char *buf = NULL;
1491                 __u32 *genp;
1492
1493                 len = 0;
1494                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1495                         RETURN(-EINVAL);
1496
1497                 data = (struct obd_ioctl_data *)buf;
1498
1499                 if (sizeof(*desc) > data->ioc_inllen1) {
1500                         obd_ioctl_freedata(buf, len);
1501                         RETURN(-EINVAL);
1502                 }
1503
1504                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1505                         obd_ioctl_freedata(buf, len);
1506                         RETURN(-EINVAL);
1507                 }
1508
1509                 if (sizeof(__u32) * count > data->ioc_inllen3) {
1510                         obd_ioctl_freedata(buf, len);
1511                         RETURN(-EINVAL);
1512                 }
1513
1514                 desc = (struct lov_desc *)data->ioc_inlbuf1;
1515                 memcpy(desc, &(lov->desc), sizeof(*desc));
1516
1517                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1518                 genp = (__u32 *)data->ioc_inlbuf3;
1519                 /* the uuid will be empty for deleted OSTs */
1520                 for (i = 0; i < count; i++, uuidp++, genp++) {
1521                         if (!lov->lov_tgts[i])
1522                                 continue;
1523                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
1524                         *genp = lov->lov_tgts[i]->ltd_gen;
1525                 }
1526
1527                 if (copy_to_user((void *)uarg, buf, len))
1528                         rc = -EFAULT;
1529                 obd_ioctl_freedata(buf, len);
1530                 break;
1531         }
1532         case LL_IOC_LOV_GETSTRIPE:
1533                 rc = lov_getstripe(exp, karg, uarg);
1534                 break;
1535         case OBD_IOC_QUOTACTL: {
1536                 struct if_quotactl *qctl = karg;
1537                 struct lov_tgt_desc *tgt = NULL;
1538                 struct obd_quotactl *oqctl;
1539
1540                 if (qctl->qc_valid == QC_OSTIDX) {
1541                         if (count <= qctl->qc_idx)
1542                                 RETURN(-EINVAL);
1543
1544                         tgt = lov->lov_tgts[qctl->qc_idx];
1545                         if (!tgt || !tgt->ltd_exp)
1546                                 RETURN(-EINVAL);
1547                 } else if (qctl->qc_valid == QC_UUID) {
1548                         for (i = 0; i < count; i++) {
1549                                 tgt = lov->lov_tgts[i];
1550                                 if (!tgt ||
1551                                     !obd_uuid_equals(&tgt->ltd_uuid,
1552                                                      &qctl->obd_uuid))
1553                                         continue;
1554
1555                                 if (tgt->ltd_exp == NULL)
1556                                         RETURN(-EINVAL);
1557
1558                                 break;
1559                         }
1560                 } else {
1561                         RETURN(-EINVAL);
1562                 }
1563
1564                 if (i >= count)
1565                         RETURN(-EAGAIN);
1566
1567                 LASSERT(tgt && tgt->ltd_exp);
1568                 OBD_ALLOC_PTR(oqctl);
1569                 if (!oqctl)
1570                         RETURN(-ENOMEM);
1571
1572                 QCTL_COPY(oqctl, qctl);
1573                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1574                 if (rc == 0) {
1575                         QCTL_COPY(qctl, oqctl);
1576                         qctl->qc_valid = QC_OSTIDX;
1577                         qctl->obd_uuid = tgt->ltd_uuid;
1578                 }
1579                 OBD_FREE_PTR(oqctl);
1580                 break;
1581         }
1582         default: {
1583                 int set = 0;
1584
1585                 if (count == 0)
1586                         RETURN(-ENOTTY);
1587
1588                 for (i = 0; i < count; i++) {
1589                         int err;
1590                         struct obd_device *osc_obd;
1591
1592                         /* OST was disconnected */
1593                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1594                                 continue;
1595
1596                         /* ll_umount_begin() sets force flag but for lov, not
1597                          * osc. Let's pass it through */
1598                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1599                         osc_obd->obd_force = obddev->obd_force;
1600                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1601                                             len, karg, uarg);
1602                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
1603                                 RETURN(err);
1604                         } else if (err) {
1605                                 if (lov->lov_tgts[i]->ltd_active) {
1606                                         CDEBUG(err == -ENOTTY ?
1607                                                D_IOCTL : D_WARNING,
1608                                                "iocontrol OSC %s on OST "
1609                                                "idx %d cmd %x: err = %d\n",
1610                                                lov_uuid2str(lov, i),
1611                                                i, cmd, err);
1612                                         if (!rc)
1613                                                 rc = err;
1614                                 }
1615                         } else {
1616                                 set = 1;
1617                         }
1618                 }
1619                 if (!set && !rc)
1620                         rc = -EIO;
1621         }
1622         }
1623
1624         RETURN(rc);
1625 }
1626
1627 #define FIEMAP_BUFFER_SIZE 4096
1628
1629 /**
1630  * Non-zero fe_logical indicates that this is a continuation FIEMAP
1631  * call. The local end offset and the device are sent in the first
1632  * fm_extent. This function calculates the stripe number from the index.
1633  * This function returns a stripe_no on which mapping is to be restarted.
1634  *
1635  * This function returns fm_end_offset which is the in-OST offset at which
1636  * mapping should be restarted. If fm_end_offset=0 is returned then caller
1637  * will re-calculate proper offset in next stripe.
1638  * Note that the first extent is passed to lov_get_info via the value field.
1639  *
1640  * \param fiemap fiemap request header
1641  * \param lsm striping information for the file
1642  * \param fm_start logical start of mapping
1643  * \param fm_end logical end of mapping
1644  * \param start_stripe starting stripe will be returned in this
1645  */
1646 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
1647                                    struct lov_stripe_md *lsm, obd_size fm_start,
1648                                    obd_size fm_end, int *start_stripe)
1649 {
1650         obd_size local_end = fiemap->fm_extents[0].fe_logical;
1651         obd_off lun_start, lun_end;
1652         obd_size fm_end_offset;
1653         int stripe_no = -1, i;
1654
1655         if (fiemap->fm_extent_count == 0 ||
1656             fiemap->fm_extents[0].fe_logical == 0)
1657                 return 0;
1658
1659         /* Find out stripe_no from ost_index saved in the fe_device */
1660         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1661                 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
1662                                         fiemap->fm_extents[0].fe_device) {
1663                         stripe_no = i;
1664                         break;
1665                 }
1666         }
1667         if (stripe_no == -1)
1668                 return -EINVAL;
1669
1670         /* If we have finished mapping on previous device, shift logical
1671          * offset to start of next device */
1672         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
1673                                    &lun_start, &lun_end)) != 0 &&
1674                                    local_end < lun_end) {
1675                 fm_end_offset = local_end;
1676                 *start_stripe = stripe_no;
1677         } else {
1678                 /* This is a special value to indicate that caller should
1679                  * calculate offset in next stripe. */
1680                 fm_end_offset = 0;
1681                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
1682         }
1683
1684         return fm_end_offset;
1685 }
1686
1687 /**
1688  * We calculate on which OST the mapping will end. If the length of mapping
1689  * is greater than (stripe_size * stripe_count) then the last_stripe will
1690  * will be one just before start_stripe. Else we check if the mapping
1691  * intersects each OST and find last_stripe.
1692  * This function returns the last_stripe and also sets the stripe_count
1693  * over which the mapping is spread
1694  *
1695  * \param lsm striping information for the file
1696  * \param fm_start logical start of mapping
1697  * \param fm_end logical end of mapping
1698  * \param start_stripe starting stripe of the mapping
1699  * \param stripe_count the number of stripes across which to map is returned
1700  *
1701  * \retval last_stripe return the last stripe of the mapping
1702  */
1703 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
1704                             obd_size fm_end, int start_stripe,
1705                             int *stripe_count)
1706 {
1707         int last_stripe;
1708         obd_off obd_start, obd_end;
1709         int i, j;
1710
1711         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
1712                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
1713                                                               start_stripe - 1);
1714                 *stripe_count = lsm->lsm_stripe_count;
1715         } else {
1716                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
1717                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
1718                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
1719                                                    &obd_start, &obd_end)) == 0)
1720                                 break;
1721                 }
1722                 *stripe_count = j;
1723                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
1724         }
1725
1726         return last_stripe;
1727 }
1728
1729 /**
1730  * Set fe_device and copy extents from local buffer into main return buffer.
1731  *
1732  * \param fiemap fiemap request header
1733  * \param lcl_fm_ext array of local fiemap extents to be copied
1734  * \param ost_index OST index to be written into the fm_device field for each
1735                     extent
1736  * \param ext_count number of extents to be copied
1737  * \param current_extent where to start copying in main extent array
1738  */
1739 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
1740                                   struct ll_fiemap_extent *lcl_fm_ext,
1741                                   int ost_index, unsigned int ext_count,
1742                                   int current_extent)
1743 {
1744         char *to;
1745         int ext;
1746
1747         for (ext = 0; ext < ext_count; ext++) {
1748                 lcl_fm_ext[ext].fe_device = ost_index;
1749                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
1750         }
1751
1752         /* Copy fm_extent's from fm_local to return buffer */
1753         to = (char *)fiemap + fiemap_count_to_size(current_extent);
1754         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
1755 }
1756
1757 /**
1758  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
1759  * This also handles the restarting of FIEMAP calls in case mapping overflows
1760  * the available number of extents in single call.
1761  */
1762 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
1763                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
1764 {
1765         struct ll_fiemap_info_key *fm_key = key;
1766         struct ll_user_fiemap *fiemap = val;
1767         struct ll_user_fiemap *fm_local = NULL;
1768         struct ll_fiemap_extent *lcl_fm_ext;
1769         int count_local;
1770         unsigned int get_num_extents = 0;
1771         int ost_index = 0, actual_start_stripe, start_stripe;
1772         obd_size fm_start, fm_end, fm_length, fm_end_offset;
1773         obd_size curr_loc;
1774         int current_extent = 0, rc = 0, i;
1775         int ost_eof = 0; /* EOF for object */
1776         int ost_done = 0; /* done with required mapping for this OST? */
1777         int last_stripe;
1778         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
1779         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
1780
1781         if (!lsm_has_objects(lsm)) {
1782                 if (lsm && lsm_is_released(lsm) && (fm_key->fiemap.fm_start <
1783                     fm_key->oa.o_size)) {
1784                         /* released file, return a minimal FIEMAP if
1785                          * request fits in file-size.
1786                          */
1787                         fiemap->fm_mapped_extents = 1;
1788                         fiemap->fm_extents[0].fe_logical =
1789                                                 fm_key->fiemap.fm_start;
1790                         if (fm_key->fiemap.fm_start + fm_key->fiemap.fm_length <
1791                             fm_key->oa.o_size)
1792                                 fiemap->fm_extents[0].fe_length =
1793                                                 fm_key->fiemap.fm_length;
1794                         else
1795                                 fiemap->fm_extents[0].fe_length =
1796                                                 fm_key->oa.o_size -
1797                                                 fm_key->fiemap.fm_start;
1798                         fiemap->fm_extents[0].fe_flags |=
1799                                                 (FIEMAP_EXTENT_UNKNOWN |
1800                                                  FIEMAP_EXTENT_LAST);
1801                 }
1802                 GOTO(out, rc = 0);
1803         }
1804
1805         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
1806                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
1807
1808         OBD_ALLOC_LARGE(fm_local, buffer_size);
1809         if (fm_local == NULL)
1810                 GOTO(out, rc = -ENOMEM);
1811         lcl_fm_ext = &fm_local->fm_extents[0];
1812
1813         count_local = fiemap_size_to_count(buffer_size);
1814
1815         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
1816         fm_start = fiemap->fm_start;
1817         fm_length = fiemap->fm_length;
1818         /* Calculate start stripe, last stripe and length of mapping */
1819         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
1820         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
1821                                                 fm_start + fm_length - 1);
1822         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
1823         if (fm_end > fm_key->oa.o_size)
1824                 fm_end = fm_key->oa.o_size;
1825
1826         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
1827                                             actual_start_stripe, &stripe_count);
1828
1829         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start,
1830                                                   fm_end, &start_stripe);
1831         if (fm_end_offset == -EINVAL)
1832                 GOTO(out, rc = -EINVAL);
1833
1834         if (fiemap->fm_extent_count == 0) {
1835                 get_num_extents = 1;
1836                 count_local = 0;
1837         }
1838
1839         /* Check each stripe */
1840         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
1841              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
1842                 obd_size req_fm_len; /* Stores length of required mapping */
1843                 obd_size len_mapped_single_call;
1844                 obd_off lun_start, lun_end, obd_object_end;
1845                 unsigned int ext_count;
1846
1847                 cur_stripe_wrap = cur_stripe;
1848
1849                 /* Find out range of mapping on this stripe */
1850                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
1851                                            &lun_start, &obd_object_end)) == 0)
1852                         continue;
1853
1854                 /* If this is a continuation FIEMAP call and we are on
1855                  * starting stripe then lun_start needs to be set to
1856                  * fm_end_offset */
1857                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
1858                         lun_start = fm_end_offset;
1859
1860                 if (fm_length != ~0ULL) {
1861                         /* Handle fm_start + fm_length overflow */
1862                         if (fm_start + fm_length < fm_start)
1863                                 fm_length = ~0ULL - fm_start;
1864                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
1865                                                      cur_stripe);
1866                 } else {
1867                         lun_end = ~0ULL;
1868                 }
1869
1870                 if (lun_start == lun_end)
1871                         continue;
1872
1873                 req_fm_len = obd_object_end - lun_start;
1874                 fm_local->fm_length = 0;
1875                 len_mapped_single_call = 0;
1876
1877                 /* If the output buffer is very large and the objects have many
1878                  * extents we may need to loop on a single OST repeatedly */
1879                 ost_eof = 0;
1880                 ost_done = 0;
1881                 do {
1882                         if (get_num_extents == 0) {
1883                                 /* Don't get too many extents. */
1884                                 if (current_extent + count_local >
1885                                     fiemap->fm_extent_count)
1886                                         count_local = fiemap->fm_extent_count -
1887                                                                  current_extent;
1888                         }
1889
1890                         lun_start += len_mapped_single_call;
1891                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
1892                         req_fm_len = fm_local->fm_length;
1893                         fm_local->fm_extent_count = count_local;
1894                         fm_local->fm_mapped_extents = 0;
1895                         fm_local->fm_flags = fiemap->fm_flags;
1896
1897                         fm_key->oa.o_oi = lsm->lsm_oinfo[cur_stripe]->loi_oi;
1898                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
1899
1900                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
1901                                 GOTO(out, rc = -EINVAL);
1902
1903                         /* If OST is inactive, return extent with UNKNOWN flag */
1904                         if (!lov->lov_tgts[ost_index]->ltd_active) {
1905                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
1906                                 fm_local->fm_mapped_extents = 1;
1907
1908                                 lcl_fm_ext[0].fe_logical = lun_start;
1909                                 lcl_fm_ext[0].fe_length = obd_object_end -
1910                                                                       lun_start;
1911                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
1912
1913                                 goto inactive_tgt;
1914                         }
1915
1916                         fm_local->fm_start = lun_start;
1917                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
1918                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
1919                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
1920                         rc = obd_get_info(NULL,
1921                                           lov->lov_tgts[ost_index]->ltd_exp,
1922                                           keylen, key, vallen, fm_local, lsm);
1923                         if (rc != 0)
1924                                 GOTO(out, rc);
1925
1926 inactive_tgt:
1927                         ext_count = fm_local->fm_mapped_extents;
1928                         if (ext_count == 0) {
1929                                 ost_done = 1;
1930                                 /* If last stripe has hole at the end,
1931                                  * then we need to return */
1932                                 if (cur_stripe_wrap == last_stripe) {
1933                                         fiemap->fm_mapped_extents = 0;
1934                                         goto finish;
1935                                 }
1936                                 break;
1937                         }
1938
1939                         /* If we just need num of extents then go to next device */
1940                         if (get_num_extents) {
1941                                 current_extent += ext_count;
1942                                 break;
1943                         }
1944
1945                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
1946                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
1947
1948                         /* Have we finished mapping on this device? */
1949                         if (req_fm_len <= len_mapped_single_call)
1950                                 ost_done = 1;
1951
1952                         /* Clear the EXTENT_LAST flag which can be present on
1953                          * last extent */
1954                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
1955                                 lcl_fm_ext[ext_count - 1].fe_flags &=
1956                                                             ~FIEMAP_EXTENT_LAST;
1957
1958                         curr_loc = lov_stripe_size(lsm,
1959                                            lcl_fm_ext[ext_count - 1].fe_logical+
1960                                            lcl_fm_ext[ext_count - 1].fe_length,
1961                                            cur_stripe);
1962                         if (curr_loc >= fm_key->oa.o_size)
1963                                 ost_eof = 1;
1964
1965                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
1966                                                      ost_index, ext_count,
1967                                                      current_extent);
1968
1969                         current_extent += ext_count;
1970
1971                         /* Ran out of available extents? */
1972                         if (current_extent >= fiemap->fm_extent_count)
1973                                 goto finish;
1974                 } while (ost_done == 0 && ost_eof == 0);
1975
1976                 if (cur_stripe_wrap == last_stripe)
1977                         goto finish;
1978         }
1979
1980 finish:
1981         /* Indicate that we are returning device offsets unless file just has
1982          * single stripe */
1983         if (lsm->lsm_stripe_count > 1)
1984                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
1985
1986         if (get_num_extents)
1987                 goto skip_last_device_calc;
1988
1989         /* Check if we have reached the last stripe and whether mapping for that
1990          * stripe is done. */
1991         if (cur_stripe_wrap == last_stripe) {
1992                 if (ost_done || ost_eof)
1993                         fiemap->fm_extents[current_extent - 1].fe_flags |=
1994                                                              FIEMAP_EXTENT_LAST;
1995         }
1996
1997 skip_last_device_calc:
1998         fiemap->fm_mapped_extents = current_extent;
1999
2000 out:
2001         if (fm_local)
2002                 OBD_FREE_LARGE(fm_local, buffer_size);
2003         return rc;
2004 }
2005
2006 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
2007                         __u32 keylen, void *key, __u32 *vallen, void *val,
2008                         struct lov_stripe_md *lsm)
2009 {
2010         struct obd_device *obddev = class_exp2obd(exp);
2011         struct lov_obd *lov = &obddev->u.lov;
2012         int i, rc;
2013         ENTRY;
2014
2015         if (!vallen || !val)
2016                 RETURN(-EFAULT);
2017
2018         obd_getref(obddev);
2019
2020         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2021                 struct {
2022                         char name[16];
2023                         struct ldlm_lock *lock;
2024                 } *data = key;
2025                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2026                 struct lov_oinfo *loi;
2027                 __u32 *stripe = val;
2028
2029                 if (*vallen < sizeof(*stripe))
2030                         GOTO(out, rc = -EFAULT);
2031                 *vallen = sizeof(*stripe);
2032
2033                 /* XXX This is another one of those bits that will need to
2034                  * change if we ever actually support nested LOVs.  It uses
2035                  * the lock's export to find out which stripe it is. */
2036                 /* XXX - it's assumed all the locks for deleted OSTs have
2037                  * been cancelled. Also, the export for deleted OSTs will
2038                  * be NULL and won't match the lock's export. */
2039                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2040                         loi = lsm->lsm_oinfo[i];
2041                         if (!lov->lov_tgts[loi->loi_ost_idx])
2042                                 continue;
2043                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2044                             data->lock->l_conn_export &&
2045                             ostid_res_name_eq(&loi->loi_oi, res_id)) {
2046                                 *stripe = i;
2047                                 GOTO(out, rc = 0);
2048                         }
2049                 }
2050                 LDLM_ERROR(data->lock, "lock on inode without such object");
2051                 dump_lsm(D_ERROR, lsm);
2052                 GOTO(out, rc = -ENXIO);
2053         } else if (KEY_IS(KEY_LAST_ID)) {
2054                 struct obd_id_info *info = val;
2055                 __u32 size = sizeof(obd_id);
2056                 struct lov_tgt_desc *tgt;
2057
2058                 LASSERT(*vallen == sizeof(struct obd_id_info));
2059                 tgt = lov->lov_tgts[info->idx];
2060
2061                 if (!tgt || !tgt->ltd_active)
2062                         GOTO(out, rc = -ESRCH);
2063
2064                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
2065                                   &size, info->data, NULL);
2066                 GOTO(out, rc = 0);
2067         } else if (KEY_IS(KEY_LOVDESC)) {
2068                 struct lov_desc *desc_ret = val;
2069                 *desc_ret = lov->desc;
2070
2071                 GOTO(out, rc = 0);
2072         } else if (KEY_IS(KEY_FIEMAP)) {
2073                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2074                 GOTO(out, rc);
2075         } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2076                 struct lov_tgt_desc *tgt;
2077                 __u64 ost_idx = *((__u64*)val);
2078
2079                 LASSERT(*vallen == sizeof(__u64));
2080                 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2081                 tgt = lov->lov_tgts[ost_idx];
2082
2083                 if (!tgt || !tgt->ltd_exp)
2084                         GOTO(out, rc = -ESRCH);
2085
2086                 *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp);
2087                 GOTO(out, rc = 0);
2088         } else if (KEY_IS(KEY_TGT_COUNT)) {
2089                 *((int *)val) = lov->desc.ld_tgt_count;
2090                 GOTO(out, rc = 0);
2091         }
2092
2093         rc = -EINVAL;
2094
2095 out:
2096         obd_putref(obddev);
2097         RETURN(rc);
2098 }
2099
2100 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
2101                               obd_count keylen, void *key, obd_count vallen,
2102                               void *val, struct ptlrpc_request_set *set)
2103 {
2104         struct obd_device *obddev = class_exp2obd(exp);
2105         struct lov_obd *lov = &obddev->u.lov;
2106         obd_count count;
2107         int i, rc = 0, err;
2108         struct lov_tgt_desc *tgt;
2109         unsigned incr, check_uuid,
2110                  do_inactive, no_set;
2111         unsigned next_id = 0,  mds_con = 0, capa = 0;
2112         ENTRY;
2113
2114         incr = check_uuid = do_inactive = no_set = 0;
2115         if (set == NULL) {
2116                 no_set = 1;
2117                 set = ptlrpc_prep_set();
2118                 if (!set)
2119                         RETURN(-ENOMEM);
2120         }
2121
2122         obd_getref(obddev);
2123         count = lov->desc.ld_tgt_count;
2124
2125         if (KEY_IS(KEY_NEXT_ID)) {
2126                 count = vallen / sizeof(struct obd_id_info);
2127                 vallen = sizeof(obd_id);
2128                 incr = sizeof(struct obd_id_info);
2129                 do_inactive = 1;
2130                 next_id = 1;
2131         } else if (KEY_IS(KEY_CHECKSUM)) {
2132                 do_inactive = 1;
2133         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2134                 /* use defaults:  do_inactive = incr = 0; */
2135         } else if (KEY_IS(KEY_MDS_CONN)) {
2136                 mds_con = 1;
2137         } else if (KEY_IS(KEY_CAPA_KEY)) {
2138                 capa = 1;
2139         } else if (KEY_IS(KEY_CACHE_SET)) {
2140                 LASSERT(lov->lov_cache == NULL);
2141                 lov->lov_cache = val;
2142                 do_inactive = 1;
2143         }
2144
2145         for (i = 0; i < count; i++, val = (char *)val + incr) {
2146                 if (next_id) {
2147                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2148                 } else {
2149                         tgt = lov->lov_tgts[i];
2150                 }
2151                 /* OST was disconnected */
2152                 if (!tgt || !tgt->ltd_exp)
2153                         continue;
2154
2155                 /* OST is inactive and we don't want inactive OSCs */
2156                 if (!tgt->ltd_active && !do_inactive)
2157                         continue;
2158
2159                 if (mds_con) {
2160                         struct mds_group_info *mgi;
2161
2162                         LASSERT(vallen == sizeof(*mgi));
2163                         mgi = (struct mds_group_info *)val;
2164
2165                         /* Only want a specific OSC */
2166                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2167                                                 &tgt->ltd_uuid))
2168                                 continue;
2169
2170                         err = obd_set_info_async(env, tgt->ltd_exp,
2171                                          keylen, key, sizeof(int),
2172                                          &mgi->group, set);
2173                 } else if (next_id) {
2174                         err = obd_set_info_async(env, tgt->ltd_exp,
2175                                          keylen, key, vallen,
2176                                          ((struct obd_id_info*)val)->data, set);
2177                 } else if (capa) {
2178                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2179
2180                         LASSERT(vallen == sizeof(*info));
2181
2182                          /* Only want a specific OSC */
2183                         if (info->uuid &&
2184                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2185                                 continue;
2186
2187                         err = obd_set_info_async(env, tgt->ltd_exp, keylen,
2188                                                  key, sizeof(*info->capa),
2189                                                  info->capa, set);
2190                 } else {
2191                         /* Only want a specific OSC */
2192                         if (check_uuid &&
2193                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2194                                 continue;
2195
2196                         err = obd_set_info_async(env, tgt->ltd_exp,
2197                                          keylen, key, vallen, val, set);
2198                 }
2199
2200                 if (!rc)
2201                         rc = err;
2202         }
2203
2204         obd_putref(obddev);
2205         if (no_set) {
2206                 err = ptlrpc_set_wait(set);
2207                 if (!rc)
2208                         rc = err;
2209                 ptlrpc_set_destroy(set);
2210         }
2211         RETURN(rc);
2212 }
2213
2214 void lov_stripe_lock(struct lov_stripe_md *md)
2215 {
2216         LASSERT(md->lsm_lock_owner != current_pid());
2217         spin_lock(&md->lsm_lock);
2218         LASSERT(md->lsm_lock_owner == 0);
2219         md->lsm_lock_owner = current_pid();
2220 }
2221
2222 void lov_stripe_unlock(struct lov_stripe_md *md)
2223 {
2224         LASSERT(md->lsm_lock_owner == current_pid());
2225         md->lsm_lock_owner = 0;
2226         spin_unlock(&md->lsm_lock);
2227 }
2228
2229 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
2230                         struct obd_quotactl *oqctl)
2231 {
2232         struct lov_obd      *lov = &obd->u.lov;
2233         struct lov_tgt_desc *tgt;
2234         __u64                curspace = 0;
2235         __u64                bhardlimit = 0;
2236         int                  i, rc = 0;
2237         ENTRY;
2238
2239         if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON &&
2240             oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF &&
2241             oqctl->qc_cmd != Q_GETOQUOTA &&
2242             oqctl->qc_cmd != Q_INITQUOTA &&
2243             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
2244             oqctl->qc_cmd != Q_FINVALIDATE) {
2245                 CERROR("bad quota opc %x for lov obd", oqctl->qc_cmd);
2246                 RETURN(-EFAULT);
2247         }
2248
2249         /* for lov tgt */
2250         obd_getref(obd);
2251         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2252                 int err;
2253
2254                 tgt = lov->lov_tgts[i];
2255
2256                 if (!tgt)
2257                         continue;
2258
2259                 if (!tgt->ltd_active || tgt->ltd_reap) {
2260                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
2261                             lov->lov_tgts[i]->ltd_activate) {
2262                                 rc = -EREMOTEIO;
2263                                 CERROR("ost %d is inactive\n", i);
2264                         } else {
2265                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
2266                         }
2267                         continue;
2268                 }
2269
2270                 err = obd_quotactl(tgt->ltd_exp, oqctl);
2271                 if (err) {
2272                         if (tgt->ltd_active && !rc)
2273                                 rc = err;
2274                         continue;
2275                 }
2276
2277                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2278                         curspace += oqctl->qc_dqblk.dqb_curspace;
2279                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
2280                 }
2281         }
2282         obd_putref(obd);
2283
2284         if (oqctl->qc_cmd == Q_GETOQUOTA) {
2285                 oqctl->qc_dqblk.dqb_curspace = curspace;
2286                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
2287         }
2288         RETURN(rc);
2289 }
2290
2291 static int lov_quotacheck(struct obd_device *obd, struct obd_export *exp,
2292                           struct obd_quotactl *oqctl)
2293 {
2294         struct lov_obd *lov = &obd->u.lov;
2295         int             i, rc = 0;
2296         ENTRY;
2297
2298         obd_getref(obd);
2299
2300         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2301                 if (!lov->lov_tgts[i])
2302                         continue;
2303
2304                 /* Skip quota check on the administratively disabled OSTs. */
2305                 if (!lov->lov_tgts[i]->ltd_activate) {
2306                         CWARN("lov idx %d was administratively disabled, "
2307                               "skip quotacheck on it.\n", i);
2308                         continue;
2309                 }
2310
2311                 if (!lov->lov_tgts[i]->ltd_active) {
2312                         CERROR("lov idx %d inactive\n", i);
2313                         rc = -EIO;
2314                         goto out;
2315                 }
2316         }
2317
2318         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2319                 int err;
2320
2321                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate)
2322                         continue;
2323
2324                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
2325                 if (err && !rc)
2326                         rc = err;
2327         }
2328
2329 out:
2330         obd_putref(obd);
2331
2332         RETURN(rc);
2333 }
2334
2335 static struct obd_ops lov_obd_ops = {
2336         .o_owner                = THIS_MODULE,
2337         .o_setup                = lov_setup,
2338         .o_precleanup           = lov_precleanup,
2339         .o_cleanup              = lov_cleanup,
2340         .o_connect              = lov_connect,
2341         .o_disconnect           = lov_disconnect,
2342         .o_statfs               = lov_statfs,
2343         .o_statfs_async         = lov_statfs_async,
2344         .o_packmd               = lov_packmd,
2345         .o_unpackmd             = lov_unpackmd,
2346         .o_create               = lov_create,
2347         .o_destroy              = lov_destroy,
2348         .o_getattr_async        = lov_getattr_async,
2349         .o_setattr_async        = lov_setattr_async,
2350         .o_adjust_kms           = lov_adjust_kms,
2351         .o_change_cbdata        = lov_change_cbdata,
2352         .o_find_cbdata          = lov_find_cbdata,
2353         .o_iocontrol            = lov_iocontrol,
2354         .o_get_info             = lov_get_info,
2355         .o_set_info_async       = lov_set_info_async,
2356         .o_notify               = lov_notify,
2357         .o_pool_new             = lov_pool_new,
2358         .o_pool_rem             = lov_pool_remove,
2359         .o_pool_add             = lov_pool_add,
2360         .o_pool_del             = lov_pool_del,
2361         .o_getref               = lov_getref,
2362         .o_putref               = lov_putref,
2363         .o_quotactl             = lov_quotactl,
2364         .o_quotacheck           = lov_quotacheck,
2365 };
2366
2367 struct kmem_cache *lov_oinfo_slab;
2368
2369 extern struct lu_kmem_descr lov_caches[];
2370
2371 int __init lov_init(void)
2372 {
2373         int rc;
2374         ENTRY;
2375
2376         /* print an address of _any_ initialized kernel symbol from this
2377          * module, to allow debugging with gdb that doesn't support data
2378          * symbols from modules.*/
2379         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
2380
2381         rc = lu_kmem_init(lov_caches);
2382         if (rc)
2383                 return rc;
2384
2385         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
2386                                            sizeof(struct lov_oinfo), 0,
2387                                            SLAB_HWCACHE_ALIGN, NULL);
2388         if (lov_oinfo_slab == NULL) {
2389                 lu_kmem_fini(lov_caches);
2390                 return -ENOMEM;
2391         }
2392
2393         rc = class_register_type(&lov_obd_ops, NULL, NULL,
2394 #ifndef HAVE_ONLY_PROCFS_SEQ
2395                                 NULL,
2396 #endif
2397                                 LUSTRE_LOV_NAME, &lov_device_type);
2398
2399         if (rc) {
2400                 kmem_cache_destroy(lov_oinfo_slab);
2401                 lu_kmem_fini(lov_caches);
2402         }
2403
2404         RETURN(rc);
2405 }
2406
2407 #ifdef __KERNEL__
2408 static void /*__exit*/ lov_exit(void)
2409 {
2410         class_unregister_type(LUSTRE_LOV_NAME);
2411         kmem_cache_destroy(lov_oinfo_slab);
2412         lu_kmem_fini(lov_caches);
2413 }
2414
2415 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2416 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2417 MODULE_LICENSE("GPL");
2418
2419 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
2420 #endif