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_log.h>
  67 #include <lustre_fid.h>
  68
  69 #include "lov_internal.h"
  70
  71 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  72    Any function that expects lov_tgts to remain stationary must take a ref. */
  73 static void lov_getref(struct obd_device *obd)
  74 {
  75         struct lov_obd *lov = &obd->u.lov;
  76
  77         /* nobody gets through here until lov_putref is done */
  78         mutex_lock(&lov->lov_lock);
  79         cfs_atomic_inc(&lov->lov_refcount);
  80         mutex_unlock(&lov->lov_lock);
  81         return;
  82 }
  83
  84 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  85
  86 static void lov_putref(struct obd_device *obd)
  87 {
  88         struct lov_obd *lov = &obd->u.lov;
  89
  90         mutex_lock(&lov->lov_lock);
  91         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  92         if (cfs_atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  93                 CFS_LIST_HEAD(kill);
  94                 int i;
  95                 struct lov_tgt_desc *tgt, *n;
  96                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  97                        lov->lov_death_row);
  98                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  99                         tgt = lov->lov_tgts[i];
 100
 101                         if (!tgt || !tgt->ltd_reap)
 102                                 continue;
 103                         cfs_list_add(&tgt->ltd_kill, &kill);
 104                         /* XXX - right now there is a dependency on ld_tgt_count
 105                          * being the maximum tgt index for computing the
 106                          * mds_max_easize. So we can't shrink it. */
 107                         lov_ost_pool_remove(&lov->lov_packed, i);
 108                         lov->lov_tgts[i] = NULL;
 109                         lov->lov_death_row--;
 110                 }
 111                 mutex_unlock(&lov->lov_lock);
 112
 113                 cfs_list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 114                         cfs_list_del(&tgt->ltd_kill);
 115                         /* Disconnect */
 116                         __lov_del_obd(obd, tgt);
 117                 }
 118         } else {
 119                 mutex_unlock(&lov->lov_lock);
 120         }
 121 }
 122
 123 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 124                               enum obd_notify_event ev);
 125 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 126                       enum obd_notify_event ev, void *data);
 127
 128
 129 #define MAX_STRING_SIZE 128
 130 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 131                     struct obd_connect_data *data)
 132 {
 133         struct lov_obd *lov = &obd->u.lov;
 134         struct obd_uuid *tgt_uuid;
 135         struct obd_device *tgt_obd;
 136         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 137         struct obd_import *imp;
 138 #ifdef __KERNEL__
 139         struct proc_dir_entry *lov_proc_dir;
 140 #endif
 141         int rc;
 142         ENTRY;
 143
 144         if (!lov->lov_tgts[index])
 145                 RETURN(-EINVAL);
 146
 147         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 148         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 149
 150         if (!tgt_obd->obd_set_up) {
 151                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 152                 RETURN(-EINVAL);
 153         }
 154
 155         /* override the sp_me from lov */
 156         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 157
 158         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 159                 data->ocd_index = index;
 160
 161         /*
 162          * Divine LOV knows that OBDs under it are OSCs.
 163          */
 164         imp = tgt_obd->u.cli.cl_import;
 165
 166         if (activate) {
 167                 tgt_obd->obd_no_recov = 0;
 168                 /* FIXME this is probably supposed to be
 169                    ptlrpc_set_import_active.  Horrible naming. */
 170                 ptlrpc_activate_import(imp);
 171         }
 172
 173         rc = obd_register_observer(tgt_obd, obd);
 174         if (rc) {
 175                 CERROR("Target %s register_observer error %d\n",
 176                        obd_uuid2str(tgt_uuid), rc);
 177                 RETURN(rc);
 178         }
 179
 180
 181         if (imp->imp_invalid) {
 182                 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
 183                        "disabled\n", obd_uuid2str(tgt_uuid));
 184                 RETURN(0);
 185         }
 186
 187         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 188                          &lov_osc_uuid, data, NULL);
 189         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 190                 CERROR("Target %s connect error %d\n",
 191                        obd_uuid2str(tgt_uuid), rc);
 192                 RETURN(-ENODEV);
 193         }
 194
 195         lov->lov_tgts[index]->ltd_reap = 0;
 196
 197         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 198                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 199
 200 #ifdef __KERNEL__
 201         lov_proc_dir = obd->obd_proc_private;
 202         if (lov_proc_dir) {
 203                 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
 204                 struct proc_dir_entry *osc_symlink;
 205
 206                 LASSERT(osc_obd != NULL);
 207                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
 208                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 209
 210                 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name,
 211                                                   lov_proc_dir,
 212                                                   "../../../%s/%s",
 213                                                   osc_obd->obd_type->typ_name,
 214                                                   osc_obd->obd_name);
 215                 if (osc_symlink == NULL) {
 216                         CERROR("could not register LOV target "
 217                                 "/proc/fs/lustre/%s/%s/target_obds/%s.",
 218                                 obd->obd_type->typ_name, obd->obd_name,
 219                                 osc_obd->obd_name);
 220                         lprocfs_remove(&lov_proc_dir);
 221                         obd->obd_proc_private = NULL;
 222                 }
 223         }
 224 #endif
 225
 226         RETURN(0);
 227 }
 228
 229 static int lov_connect(const struct lu_env *env,
 230                        struct obd_export **exp, struct obd_device *obd,
 231                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 232                        void *localdata)
 233 {
 234         struct lov_obd *lov = &obd->u.lov;
 235         struct lov_tgt_desc *tgt;
 236         struct lustre_handle conn;
 237         int i, rc;
 238         ENTRY;
 239
 240         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 241
 242         rc = class_connect(&conn, obd, cluuid);
 243         if (rc)
 244                 RETURN(rc);
 245
 246         *exp = class_conn2export(&conn);
 247
 248         /* Why should there ever be more than 1 connect? */
 249         lov->lov_connects++;
 250         LASSERT(lov->lov_connects == 1);
 251
 252         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 253         if (data)
 254                 lov->lov_ocd = *data;
 255
 256         obd_getref(obd);
 257         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 258                 tgt = lov->lov_tgts[i];
 259                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 260                         continue;
 261                 /* Flags will be lowest common denominator */
 262                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 263                 if (rc) {
 264                         CERROR("%s: lov connect tgt %d failed: %d\n",
 265                                obd->obd_name, i, rc);
 266                         continue;
 267                 }
 268                 /* connect to administrative disabled ost */
 269                 if (!lov->lov_tgts[i]->ltd_exp)
 270                         continue;
 271
 272                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 273                                 OBD_NOTIFY_CONNECT, (void *)&i);
 274                 if (rc) {
 275                         CERROR("%s error sending notify %d\n",
 276                                obd->obd_name, rc);
 277                 }
 278         }
 279         obd_putref(obd);
 280
 281         RETURN(0);
 282 }
 283
 284 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 285 {
 286         struct proc_dir_entry *lov_proc_dir;
 287         struct lov_obd *lov = &obd->u.lov;
 288         struct obd_device *osc_obd;
 289         int rc;
 290         ENTRY;
 291
 292         osc_obd = class_exp2obd(tgt->ltd_exp);
 293         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 294                obd->obd_name, osc_obd->obd_name);
 295
 296         if (tgt->ltd_active) {
 297                 tgt->ltd_active = 0;
 298                 lov->desc.ld_active_tgt_count--;
 299                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 300         }
 301
 302         lov_proc_dir = obd->obd_proc_private;
 303         if (lov_proc_dir)
 304                 lprocfs_remove_proc_entry(osc_obd->obd_name, lov_proc_dir);
 305
 306         if (osc_obd) {
 307                 /* Pass it on to our clients.
 308                  * XXX This should be an argument to disconnect,
 309                  * XXX not a back-door flag on the OBD.  Ah well.
 310                  */
 311                 osc_obd->obd_force = obd->obd_force;
 312                 osc_obd->obd_fail = obd->obd_fail;
 313                 osc_obd->obd_no_recov = obd->obd_no_recov;
 314         }
 315
 316         obd_register_observer(osc_obd, NULL);
 317
 318         rc = obd_disconnect(tgt->ltd_exp);
 319         if (rc) {
 320                 CERROR("Target %s disconnect error %d\n",
 321                        tgt->ltd_uuid.uuid, rc);
 322                 rc = 0;
 323         }
 324
 325         tgt->ltd_exp = NULL;
 326         RETURN(0);
 327 }
 328
 329 static int lov_disconnect(struct obd_export *exp)
 330 {
 331         struct obd_device *obd = class_exp2obd(exp);
 332         struct lov_obd *lov = &obd->u.lov;
 333         int i, rc;
 334         ENTRY;
 335
 336         if (!lov->lov_tgts)
 337                 goto out;
 338
 339         /* Only disconnect the underlying layers on the final disconnect. */
 340         lov->lov_connects--;
 341         if (lov->lov_connects != 0) {
 342                 /* why should there be more than 1 connect? */
 343                 CERROR("disconnect #%d\n", lov->lov_connects);
 344                 goto out;
 345         }
 346
 347         /* Let's hold another reference so lov_del_obd doesn't spin through
 348            putref every time */
 349         obd_getref(obd);
 350
 351         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 352                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 353                         /* Disconnection is the last we know about an obd */
 354                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
 355                 }
 356         }
 357         obd_putref(obd);
 358
 359 out:
 360         rc = class_disconnect(exp); /* bz 9811 */
 361         RETURN(rc);
 362 }
 363
 364 /* Error codes:
 365  *
 366  *  -EINVAL  : UUID can't be found in the LOV's target list
 367  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 368  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 369  *  any >= 0 : is log target index
 370  */
 371 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 372                               enum obd_notify_event ev)
 373 {
 374         struct lov_obd *lov = &obd->u.lov;
 375         struct lov_tgt_desc *tgt;
 376         int index, activate, active;
 377         ENTRY;
 378
 379         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 380                lov, uuid->uuid, ev);
 381
 382         obd_getref(obd);
 383         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 384                 tgt = lov->lov_tgts[index];
 385                 if (!tgt)
 386                         continue;
 387                 /*
 388                  * LU-642, initially inactive OSC could miss the obd_connect,
 389                  * we make up for it here.
 390                  */
 391                 if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
 392                     obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 393                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 394
 395                         obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 396                                     &lov_osc_uuid, &lov->lov_ocd, NULL);
 397                 }
 398                 if (!tgt->ltd_exp)
 399                         continue;
 400
 401                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 402                        index, obd_uuid2str(&tgt->ltd_uuid),
 403                        tgt->ltd_exp->exp_handle.h_cookie);
 404                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 405                         break;
 406         }
 407
 408         if (index == lov->desc.ld_tgt_count)
 409                 GOTO(out, index = -EINVAL);
 410
 411         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 412                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 413
 414                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 415                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 416                                uuid->uuid, activate ? "" : "de");
 417                 } else {
 418                         lov->lov_tgts[index]->ltd_activate = activate;
 419                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 420                                activate ? "" : "de", obd_uuid2str(uuid));
 421                 }
 422
 423         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 424                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 425
 426                 if (lov->lov_tgts[index]->ltd_active == active) {
 427                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 428                                uuid->uuid, active ? "" : "in");
 429                         GOTO(out, index);
 430                 } else {
 431                         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 432                                obd_uuid2str(uuid), active ? "" : "in");
 433                 }
 434
 435                 lov->lov_tgts[index]->ltd_active = active;
 436                 if (active) {
 437                         lov->desc.ld_active_tgt_count++;
 438                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 439                 } else {
 440                         lov->desc.ld_active_tgt_count--;
 441                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 442                 }
 443         } else {
 444                 CERROR("Unknown event(%d) for uuid %s", ev, uuid->uuid);
 445         }
 446
 447  out:
 448         obd_putref(obd);
 449         RETURN(index);
 450 }
 451
 452 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 453                       enum obd_notify_event ev, void *data)
 454 {
 455         int rc = 0;
 456         struct lov_obd *lov = &obd->u.lov;
 457         ENTRY;
 458
 459         down_read(&lov->lov_notify_lock);
 460         if (!lov->lov_connects) {
 461                 up_read(&lov->lov_notify_lock);
 462                 RETURN(rc);
 463         }
 464
 465         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 466             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 467                 struct obd_uuid *uuid;
 468
 469                 LASSERT(watched);
 470
 471                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 472                         up_read(&lov->lov_notify_lock);
 473                         CERROR("unexpected notification of %s %s!\n",
 474                                watched->obd_type->typ_name,
 475                                watched->obd_name);
 476                         RETURN(-EINVAL);
 477                 }
 478                 uuid = &watched->u.cli.cl_target_uuid;
 479
 480                 /* Set OSC as active before notifying the observer, so the
 481                  * observer can use the OSC normally.
 482                  */
 483                 rc = lov_set_osc_active(obd, uuid, ev);
 484                 if (rc < 0) {
 485                         up_read(&lov->lov_notify_lock);
 486                         CERROR("event(%d) of %s failed: %d\n", ev,
 487                                obd_uuid2str(uuid), rc);
 488                         RETURN(rc);
 489                 }
 490                 /* active event should be pass lov target index as data */
 491                 data = &rc;
 492         }
 493
 494         /* Pass the notification up the chain. */
 495         if (watched) {
 496                 rc = obd_notify_observer(obd, watched, ev, data);
 497         } else {
 498                 /* NULL watched means all osc's in the lov (only for syncs) */
 499                 /* sync event should be send lov idx as data */
 500                 struct lov_obd *lov = &obd->u.lov;
 501                 int i, is_sync;
 502
 503                 data = &i;
 504                 is_sync = (ev == OBD_NOTIFY_SYNC) ||
 505                           (ev == OBD_NOTIFY_SYNC_NONBLOCK);
 506
 507                 obd_getref(obd);
 508                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 509                         if (!lov->lov_tgts[i])
 510                                 continue;
 511
 512                         /* don't send sync event if target not
 513                          * connected/activated */
 514                         if (is_sync &&  !lov->lov_tgts[i]->ltd_active)
 515                                 continue;
 516
 517                         rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
 518                                                  ev, data);
 519                         if (rc) {
 520                                 CERROR("%s: notify %s of %s failed %d\n",
 521                                        obd->obd_name,
 522                                        obd->obd_observer->obd_name,
 523                                        lov->lov_tgts[i]->ltd_obd->obd_name,
 524                                        rc);
 525                         }
 526                 }
 527                 obd_putref(obd);
 528         }
 529
 530         up_read(&lov->lov_notify_lock);
 531         RETURN(rc);
 532 }
 533
 534 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 535                           __u32 index, int gen, int active)
 536 {
 537         struct lov_obd *lov = &obd->u.lov;
 538         struct lov_tgt_desc *tgt;
 539         struct obd_device *tgt_obd;
 540         int rc;
 541         ENTRY;
 542
 543         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 544                uuidp->uuid, index, gen, active);
 545
 546         if (gen <= 0) {
 547                 CERROR("request to add OBD %s with invalid generation: %d\n",
 548                        uuidp->uuid, gen);
 549                 RETURN(-EINVAL);
 550         }
 551
 552         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 553                                         &obd->obd_uuid);
 554         if (tgt_obd == NULL)
 555                 RETURN(-EINVAL);
 556
 557         mutex_lock(&lov->lov_lock);
 558
 559         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 560                 tgt = lov->lov_tgts[index];
 561                 CERROR("UUID %s already assigned at LOV target index %d\n",
 562                        obd_uuid2str(&tgt->ltd_uuid), index);
 563                 mutex_unlock(&lov->lov_lock);
 564                 RETURN(-EEXIST);
 565         }
 566
 567         if (index >= lov->lov_tgt_size) {
 568                 /* We need to reallocate the lov target array. */
 569                 struct lov_tgt_desc **newtgts, **old = NULL;
 570                 __u32 newsize, oldsize = 0;
 571
 572                 newsize = max(lov->lov_tgt_size, (__u32)2);
 573                 while (newsize < index + 1)
 574                         newsize = newsize << 1;
 575                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 576                 if (newtgts == NULL) {
 577                         mutex_unlock(&lov->lov_lock);
 578                         RETURN(-ENOMEM);
 579                 }
 580
 581                 if (lov->lov_tgt_size) {
 582                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 583                                lov->lov_tgt_size);
 584                         old = lov->lov_tgts;
 585                         oldsize = lov->lov_tgt_size;
 586                 }
 587
 588                 lov->lov_tgts = newtgts;
 589                 lov->lov_tgt_size = newsize;
 590                 smp_rmb();
 591                 if (old)
 592                         OBD_FREE(old, sizeof(*old) * oldsize);
 593
 594                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 595                        lov->lov_tgts, lov->lov_tgt_size);
 596         }
 597
 598         OBD_ALLOC_PTR(tgt);
 599         if (!tgt) {
 600                 mutex_unlock(&lov->lov_lock);
 601                 RETURN(-ENOMEM);
 602         }
 603
 604         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 605         if (rc) {
 606                 mutex_unlock(&lov->lov_lock);
 607                 OBD_FREE_PTR(tgt);
 608                 RETURN(rc);
 609         }
 610
 611         tgt->ltd_uuid = *uuidp;
 612         tgt->ltd_obd = tgt_obd;
 613         /* XXX - add a sanity check on the generation number. */
 614         tgt->ltd_gen = gen;
 615         tgt->ltd_index = index;
 616         tgt->ltd_activate = active;
 617         lov->lov_tgts[index] = tgt;
 618         if (index >= lov->desc.ld_tgt_count)
 619                 lov->desc.ld_tgt_count = index + 1;
 620
 621         mutex_unlock(&lov->lov_lock);
 622
 623         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 624                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 625
 626         rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
 627
 628         if (lov->lov_connects == 0) {
 629                 /* lov_connect hasn't been called yet. We'll do the
 630                    lov_connect_obd on this target when that fn first runs,
 631                    because we don't know the connect flags yet. */
 632                 RETURN(0);
 633         }
 634
 635         obd_getref(obd);
 636
 637         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 638         if (rc)
 639                 GOTO(out, rc);
 640
 641         /* connect to administrative disabled ost */
 642         if (!tgt->ltd_exp)
 643                 GOTO(out, rc = 0);
 644
 645         if (lov->lov_cache != NULL) {
 646                 rc = obd_set_info_async(NULL, tgt->ltd_exp,
 647                                 sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 648                                 sizeof(struct cl_client_cache), lov->lov_cache,
 649                                 NULL);
 650                 if (rc < 0)
 651                         GOTO(out, rc);
 652         }
 653
 654         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 655                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
 656                         (void *)&index);
 657
 658 out:
 659         if (rc) {
 660                 CERROR("add failed (%d), deleting %s\n", rc,
 661                        obd_uuid2str(&tgt->ltd_uuid));
 662                 lov_del_target(obd, index, 0, 0);
 663         }
 664         obd_putref(obd);
 665         RETURN(rc);
 666 }
 667
 668 /* Schedule a target for deletion */
 669 int lov_del_target(struct obd_device *obd, __u32 index,
 670                    struct obd_uuid *uuidp, int gen)
 671 {
 672         struct lov_obd *lov = &obd->u.lov;
 673         int count = lov->desc.ld_tgt_count;
 674         int rc = 0;
 675         ENTRY;
 676
 677         if (index >= count) {
 678                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 679                        index, count);
 680                 RETURN(-EINVAL);
 681         }
 682
 683         /* to make sure there's no ongoing lov_notify() now */
 684         down_write(&lov->lov_notify_lock);
 685         obd_getref(obd);
 686
 687         if (!lov->lov_tgts[index]) {
 688                 CERROR("LOV target at index %d is not setup.\n", index);
 689                 GOTO(out, rc = -EINVAL);
 690         }
 691
 692         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 693                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 694                        lov_uuid2str(lov, index), index,
 695                        obd_uuid2str(uuidp));
 696                 GOTO(out, rc = -EINVAL);
 697         }
 698
 699         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 700                lov_uuid2str(lov, index), index,
 701                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 702                lov->lov_tgts[index]->ltd_active);
 703
 704         lov->lov_tgts[index]->ltd_reap = 1;
 705         lov->lov_death_row++;
 706         /* we really delete it from obd_putref */
 707 out:
 708         obd_putref(obd);
 709         up_write(&lov->lov_notify_lock);
 710
 711         RETURN(rc);
 712 }
 713
 714 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 715 {
 716         struct obd_device *osc_obd;
 717
 718         LASSERT(tgt);
 719         LASSERT(tgt->ltd_reap);
 720
 721         osc_obd = class_exp2obd(tgt->ltd_exp);
 722
 723         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 724                tgt->ltd_uuid.uuid,
 725                osc_obd ? osc_obd->obd_name : "<no obd>");
 726
 727         if (tgt->ltd_exp)
 728                 lov_disconnect_obd(obd, tgt);
 729
 730         OBD_FREE_PTR(tgt);
 731
 732         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 733            do it ourselves. And we can't do it from lov_cleanup,
 734            because we just lost our only reference to it. */
 735         if (osc_obd)
 736                 class_manual_cleanup(osc_obd);
 737 }
 738
 739 void lov_fix_desc_stripe_size(__u64 *val)
 740 {
 741         if (*val < LOV_MIN_STRIPE_SIZE) {
 742                 if (*val != 0)
 743                         LCONSOLE_INFO("Increasing default stripe size to "
 744                                       "minimum %u\n",
 745                                       LOV_DEFAULT_STRIPE_SIZE);
 746                 *val = LOV_DEFAULT_STRIPE_SIZE;
 747         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 748                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 749                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 750                               "multiple of %u)\n",
 751                               *val, LOV_MIN_STRIPE_SIZE);
 752         }
 753 }
 754
 755 void lov_fix_desc_stripe_count(__u32 *val)
 756 {
 757         if (*val == 0)
 758                 *val = 1;
 759 }
 760
 761 void lov_fix_desc_pattern(__u32 *val)
 762 {
 763         /* from lov_setstripe */
 764         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 765                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 766                 *val = 0;
 767         }
 768 }
 769
 770 void lov_fix_desc_qos_maxage(__u32 *val)
 771 {
 772         /* fix qos_maxage */
 773         if (*val == 0)
 774                 *val = QOS_DEFAULT_MAXAGE;
 775 }
 776
 777 void lov_fix_desc(struct lov_desc *desc)
 778 {
 779         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 780         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 781         lov_fix_desc_pattern(&desc->ld_pattern);
 782         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 783 }
 784
 785 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 786 {
 787         struct lov_desc *desc;
 788         struct lov_obd *lov = &obd->u.lov;
 789         int rc;
 790         ENTRY;
 791
 792         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 793                 CERROR("LOV setup requires a descriptor\n");
 794                 RETURN(-EINVAL);
 795         }
 796
 797         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 798
 799         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 800                 CERROR("descriptor size wrong: %d > %d\n",
 801                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 802                 RETURN(-EINVAL);
 803         }
 804
 805         if (desc->ld_magic != LOV_DESC_MAGIC) {
 806                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 807                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 808                                    obd->obd_name, desc);
 809                             lustre_swab_lov_desc(desc);
 810                 } else {
 811                         CERROR("%s: Bad lov desc magic: %#x\n",
 812                                obd->obd_name, desc->ld_magic);
 813                         RETURN(-EINVAL);
 814                 }
 815         }
 816
 817         lov_fix_desc(desc);
 818
 819         desc->ld_active_tgt_count = 0;
 820         lov->desc = *desc;
 821         lov->lov_tgt_size = 0;
 822
 823         mutex_init(&lov->lov_lock);
 824         cfs_atomic_set(&lov->lov_refcount, 0);
 825         lov->lov_sp_me = LUSTRE_SP_CLI;
 826
 827         init_rwsem(&lov->lov_notify_lock);
 828
 829         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 830                                                    HASH_POOLS_MAX_BITS,
 831                                                    HASH_POOLS_BKT_BITS, 0,
 832                                                    CFS_HASH_MIN_THETA,
 833                                                    CFS_HASH_MAX_THETA,
 834                                                    &pool_hash_operations,
 835                                                    CFS_HASH_DEFAULT);
 836         CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
 837         lov->lov_pool_count = 0;
 838         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 839         if (rc)
 840                 GOTO(out, rc);
 841
 842 #ifdef LPROCFS
 843         obd->obd_vars = lprocfs_lov_obd_vars;
 844         lprocfs_seq_obd_setup(obd);
 845         rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd", 0444,
 846                                 &lov_proc_target_fops, obd);
 847         if (rc)
 848                 CWARN("Error adding the target_obd file\n");
 849
 850         lov->lov_pool_proc_entry = lprocfs_seq_register("pools",
 851                                                         obd->obd_proc_entry,
 852                                                         NULL, NULL);
 853 #endif
 854         RETURN(0);
 855
 856 out:
 857         return rc;
 858 }
 859
 860 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 861 {
 862         int rc = 0;
 863         struct lov_obd *lov = &obd->u.lov;
 864
 865         ENTRY;
 866
 867         switch (stage) {
 868         case OBD_CLEANUP_EARLY: {
 869                 int i;
 870                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 871                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 872                                 continue;
 873                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 874                                        OBD_CLEANUP_EARLY);
 875                 }
 876                 break;
 877         }
 878         case OBD_CLEANUP_EXPORTS:
 879                 rc = obd_llog_finish(obd, 0);
 880                 if (rc != 0)
 881                         CERROR("failed to cleanup llogging subsystems\n");
 882                 break;
 883         }
 884         RETURN(rc);
 885 }
 886
 887 static int lov_cleanup(struct obd_device *obd)
 888 {
 889         struct lov_obd *lov = &obd->u.lov;
 890         cfs_list_t *pos, *tmp;
 891         struct pool_desc *pool;
 892         ENTRY;
 893
 894         cfs_list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 895                 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
 896                 /* free pool structs */
 897                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 898                 /* In the function below, .hs_keycmp resolves to
 899                  * pool_hashkey_keycmp() */
 900                 /* coverity[overrun-buffer-val] */
 901                 lov_pool_del(obd, pool->pool_name);
 902         }
 903         cfs_hash_putref(lov->lov_pools_hash_body);
 904         lov_ost_pool_free(&lov->lov_packed);
 905
 906         lprocfs_obd_cleanup(obd);
 907         if (lov->lov_tgts) {
 908                 int i;
 909                 obd_getref(obd);
 910                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 911                         if (!lov->lov_tgts[i])
 912                                 continue;
 913
 914                         /* Inactive targets may never have connected */
 915                         if (lov->lov_tgts[i]->ltd_active ||
 916                             cfs_atomic_read(&lov->lov_refcount))
 917                             /* We should never get here - these
 918                                should have been removed in the
 919                              disconnect. */
 920                                 CERROR("lov tgt %d not cleaned!"
 921                                        " deathrow=%d, lovrc=%d\n",
 922                                        i, lov->lov_death_row,
 923                                        cfs_atomic_read(&lov->lov_refcount));
 924                         lov_del_target(obd, i, 0, 0);
 925                 }
 926                 obd_putref(obd);
 927                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 928                          lov->lov_tgt_size);
 929                 lov->lov_tgt_size = 0;
 930         }
 931         RETURN(0);
 932 }
 933
 934 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 935                             __u32 *indexp, int *genp)
 936 {
 937         struct obd_uuid obd_uuid;
 938         int cmd;
 939         int rc = 0;
 940         ENTRY;
 941
 942         switch(cmd = lcfg->lcfg_command) {
 943         case LCFG_LOV_ADD_OBD:
 944         case LCFG_LOV_ADD_INA:
 945         case LCFG_LOV_DEL_OBD: {
 946                 __u32 index;
 947                 int gen;
 948                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 949                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 950                         GOTO(out, rc = -EINVAL);
 951
 952                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 953
 954                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
 955                         GOTO(out, rc = -EINVAL);
 956                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
 957                         GOTO(out, rc = -EINVAL);
 958                 index = *indexp;
 959                 gen = *genp;
 960                 if (cmd == LCFG_LOV_ADD_OBD)
 961                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 962                 else if (cmd == LCFG_LOV_ADD_INA)
 963                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 964                 else
 965                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 966                 GOTO(out, rc);
 967         }
 968         case LCFG_PARAM: {
 969                 struct lov_desc *desc = &(obd->u.lov.desc);
 970
 971                 if (!desc)
 972                         GOTO(out, rc = -EINVAL);
 973
 974                 rc = class_process_proc_seq_param(PARAM_LOV, obd->obd_vars,
 975                                                   lcfg, obd);
 976                 if (rc > 0)
 977                         rc = 0;
 978                 GOTO(out, rc);
 979         }
 980         case LCFG_POOL_NEW:
 981         case LCFG_POOL_ADD:
 982         case LCFG_POOL_DEL:
 983         case LCFG_POOL_REM:
 984                 GOTO(out, rc);
 985
 986         default: {
 987                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 988                 GOTO(out, rc = -EINVAL);
 989
 990         }
 991         }
 992 out:
 993         RETURN(rc);
 994 }
 995
 996 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
 997                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
 998 {
 999         struct lov_stripe_md *obj_mdp, *lsm;
1000         struct lov_obd *lov = &exp->exp_obd->u.lov;
1001         unsigned ost_idx;
1002         int rc, i;
1003         ENTRY;
1004
1005         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1006                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1007
1008         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1009         if (obj_mdp == NULL)
1010                 RETURN(-ENOMEM);
1011
1012         ost_idx = src_oa->o_nlink;
1013         lsm = *ea;
1014         if (lsm == NULL)
1015                 GOTO(out, rc = -EINVAL);
1016         if (ost_idx >= lov->desc.ld_tgt_count ||
1017             !lov->lov_tgts[ost_idx])
1018                 GOTO(out, rc = -EINVAL);
1019
1020         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1021                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1022                         if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) !=
1023                                         ostid_id(&src_oa->o_oi))
1024                                 GOTO(out, rc = -EINVAL);
1025                         break;
1026                 }
1027         }
1028         if (i == lsm->lsm_stripe_count)
1029                 GOTO(out, rc = -EINVAL);
1030
1031         rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp,
1032                         src_oa, &obj_mdp, oti);
1033 out:
1034         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1035         RETURN(rc);
1036 }
1037
1038 /* the LOV expects oa->o_id to be set to the LOV object id */
1039 static int lov_create(const struct lu_env *env, struct obd_export *exp,
1040                       struct obdo *src_oa, struct lov_stripe_md **ea,
1041                       struct obd_trans_info *oti)
1042 {
1043         struct lov_obd *lov;
1044         int rc = 0;
1045         ENTRY;
1046
1047         LASSERT(ea != NULL);
1048         if (exp == NULL)
1049                 RETURN(-EINVAL);
1050
1051         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1052             src_oa->o_flags == OBD_FL_DELORPHAN) {
1053                 /* should be used with LOV anymore */
1054                 LBUG();
1055         }
1056
1057         lov = &exp->exp_obd->u.lov;
1058         if (!lov->desc.ld_active_tgt_count)
1059                 RETURN(-EIO);
1060
1061         obd_getref(exp->exp_obd);
1062         /* Recreate a specific object id at the given OST index */
1063         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1064             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1065                  rc = lov_recreate(exp, src_oa, ea, oti);
1066         }
1067
1068         obd_putref(exp->exp_obd);
1069         RETURN(rc);
1070 }
1071
1072 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1073 do {                                                                            \
1074         LASSERT((lsmp) != NULL);                                                \
1075         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                          \
1076                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                            \
1077                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);              \
1078 } while (0)
1079
1080 static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
1081                        struct obdo *oa, struct lov_stripe_md *lsm,
1082                        struct obd_trans_info *oti, struct obd_export *md_exp,
1083                        void *capa)
1084 {
1085         struct lov_request_set *set;
1086         struct obd_info oinfo;
1087         struct lov_request *req;
1088         cfs_list_t *pos;
1089         struct lov_obd *lov;
1090         int rc = 0, err = 0;
1091         ENTRY;
1092
1093         ASSERT_LSM_MAGIC(lsm);
1094
1095         if (!exp || !exp->exp_obd)
1096                 RETURN(-ENODEV);
1097
1098         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1099                 LASSERT(oti);
1100                 LASSERT(oti->oti_logcookies);
1101         }
1102
1103         lov = &exp->exp_obd->u.lov;
1104         obd_getref(exp->exp_obd);
1105         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1106         if (rc)
1107                 GOTO(out, rc);
1108
1109         cfs_list_for_each (pos, &set->set_list) {
1110                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1111
1112                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1113                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1114
1115                 err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1116                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1117                 err = lov_update_common_set(set, req, err);
1118                 if (err) {
1119                         CERROR("%s: destroying objid "DOSTID" subobj "
1120                                DOSTID" on OST idx %d: rc = %d\n",
1121                                exp->exp_obd->obd_name, POSTID(&oa->o_oi),
1122                                POSTID(&req->rq_oi.oi_oa->o_oi),
1123                                req->rq_idx, err);
1124                         if (!rc)
1125                                 rc = err;
1126                 }
1127         }
1128
1129         if (rc == 0) {
1130                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1131                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1132         }
1133         err = lov_fini_destroy_set(set);
1134 out:
1135         obd_putref(exp->exp_obd);
1136         RETURN(rc ? rc : err);
1137 }
1138
1139 static int lov_getattr(const struct lu_env *env, struct obd_export *exp,
1140                        struct obd_info *oinfo)
1141 {
1142         struct lov_request_set *set;
1143         struct lov_request *req;
1144         cfs_list_t *pos;
1145         struct lov_obd *lov;
1146         int err = 0, rc = 0;
1147         ENTRY;
1148
1149         LASSERT(oinfo);
1150         ASSERT_LSM_MAGIC(oinfo->oi_md);
1151
1152         if (!exp || !exp->exp_obd)
1153                 RETURN(-ENODEV);
1154
1155         lov = &exp->exp_obd->u.lov;
1156
1157         rc = lov_prep_getattr_set(exp, oinfo, &set);
1158         if (rc)
1159                 RETURN(rc);
1160
1161         cfs_list_for_each (pos, &set->set_list) {
1162                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1163
1164                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1165                        " %u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1166                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1167
1168                 rc = obd_getattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1169                                  &req->rq_oi);
1170                 err = lov_update_common_set(set, req, rc);
1171                 if (err) {
1172                         CERROR("%s: getattr objid "DOSTID" subobj "
1173                                DOSTID" on OST idx %d: rc = %d\n",
1174                                exp->exp_obd->obd_name,
1175                                POSTID(&oinfo->oi_oa->o_oi),
1176                                POSTID(&req->rq_oi.oi_oa->o_oi),
1177                                req->rq_idx, err);
1178                         break;
1179                 }
1180         }
1181
1182         rc = lov_fini_getattr_set(set);
1183         if (err)
1184                 rc = err;
1185         RETURN(rc);
1186 }
1187
1188 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1189                                  void *data, int rc)
1190 {
1191         struct lov_request_set *lovset = (struct lov_request_set *)data;
1192         int err;
1193         ENTRY;
1194
1195         /* don't do attribute merge if this aysnc op failed */
1196         if (rc)
1197                 cfs_atomic_set(&lovset->set_completes, 0);
1198         err = lov_fini_getattr_set(lovset);
1199         RETURN(rc ? rc : err);
1200 }
1201
1202 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1203                               struct ptlrpc_request_set *rqset)
1204 {
1205         struct lov_request_set *lovset;
1206         struct lov_obd *lov;
1207         cfs_list_t *pos;
1208         struct lov_request *req;
1209         int rc = 0, err;
1210         ENTRY;
1211
1212         LASSERT(oinfo);
1213         ASSERT_LSM_MAGIC(oinfo->oi_md);
1214
1215         if (!exp || !exp->exp_obd)
1216                 RETURN(-ENODEV);
1217
1218         lov = &exp->exp_obd->u.lov;
1219
1220         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1221         if (rc)
1222                 RETURN(rc);
1223
1224         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1225                POSTID(&oinfo->oi_md->lsm_oi), oinfo->oi_md->lsm_stripe_count,
1226                oinfo->oi_md->lsm_stripe_size);
1227
1228         cfs_list_for_each(pos, &lovset->set_list) {
1229                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1230
1231                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1232                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1233                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1234                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1235                                        &req->rq_oi, rqset);
1236                 if (rc) {
1237                         CERROR("%s: getattr objid "DOSTID" subobj"
1238                                DOSTID" on OST idx %d: rc = %d\n",
1239                                exp->exp_obd->obd_name,
1240                                POSTID(&oinfo->oi_oa->o_oi),
1241                                POSTID(&req->rq_oi.oi_oa->o_oi),
1242                                req->rq_idx, rc);
1243                         GOTO(out, rc);
1244                 }
1245         }
1246
1247         if (!cfs_list_empty(&rqset->set_requests)) {
1248                 LASSERT(rc == 0);
1249                 LASSERT (rqset->set_interpret == NULL);
1250                 rqset->set_interpret = lov_getattr_interpret;
1251                 rqset->set_arg = (void *)lovset;
1252                 RETURN(rc);
1253         }
1254 out:
1255         if (rc)
1256                 cfs_atomic_set(&lovset->set_completes, 0);
1257         err = lov_fini_getattr_set(lovset);
1258         RETURN(rc ? rc : err);
1259 }
1260
1261 static int lov_setattr(const struct lu_env *env, struct obd_export *exp,
1262                        struct obd_info *oinfo, struct obd_trans_info *oti)
1263 {
1264         struct lov_request_set *set;
1265         struct lov_obd *lov;
1266         cfs_list_t *pos;
1267         struct lov_request *req;
1268         int err = 0, rc = 0;
1269         ENTRY;
1270
1271         LASSERT(oinfo);
1272         ASSERT_LSM_MAGIC(oinfo->oi_md);
1273
1274         if (!exp || !exp->exp_obd)
1275                 RETURN(-ENODEV);
1276
1277         /* for now, we only expect the following updates here */
1278         LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1279                                             OBD_MD_FLMODE | OBD_MD_FLATIME |
1280                                             OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1281                                             OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1282                                             OBD_MD_FLGROUP | OBD_MD_FLUID |
1283                                             OBD_MD_FLGID | OBD_MD_FLFID |
1284                                             OBD_MD_FLGENER)));
1285         lov = &exp->exp_obd->u.lov;
1286         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1287         if (rc)
1288                 RETURN(rc);
1289
1290         cfs_list_for_each (pos, &set->set_list) {
1291                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1292
1293                 rc = obd_setattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1294                                  &req->rq_oi, NULL);
1295                 err = lov_update_setattr_set(set, req, rc);
1296                 if (err) {
1297                         CERROR("%s: setattr objid "DOSTID" subobj "
1298                                DOSTID" on OST idx %d: rc = %d\n",
1299                                exp->exp_obd->obd_name,
1300                                POSTID(&set->set_oi->oi_oa->o_oi),
1301                                POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx,
1302                                err);
1303                         if (!rc)
1304                                 rc = err;
1305                 }
1306         }
1307         err = lov_fini_setattr_set(set);
1308         if (!rc)
1309                 rc = err;
1310         RETURN(rc);
1311 }
1312
1313 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1314                                  void *data, int rc)
1315 {
1316         struct lov_request_set *lovset = (struct lov_request_set *)data;
1317         int err;
1318         ENTRY;
1319
1320         if (rc)
1321                 cfs_atomic_set(&lovset->set_completes, 0);
1322         err = lov_fini_setattr_set(lovset);
1323         RETURN(rc ? rc : err);
1324 }
1325
1326 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1327    needed. Otherwise, a client is waiting for responses. */
1328 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1329                              struct obd_trans_info *oti,
1330                              struct ptlrpc_request_set *rqset)
1331 {
1332         struct lov_request_set *set;
1333         struct lov_request *req;
1334         cfs_list_t *pos;
1335         struct lov_obd *lov;
1336         int rc = 0;
1337         ENTRY;
1338
1339         LASSERT(oinfo);
1340         ASSERT_LSM_MAGIC(oinfo->oi_md);
1341         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1342                 LASSERT(oti);
1343                 LASSERT(oti->oti_logcookies);
1344         }
1345
1346         if (!exp || !exp->exp_obd)
1347                 RETURN(-ENODEV);
1348
1349         lov = &exp->exp_obd->u.lov;
1350         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1351         if (rc)
1352                 RETURN(rc);
1353
1354         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1355                POSTID(&oinfo->oi_md->lsm_oi),
1356                oinfo->oi_md->lsm_stripe_count,
1357                oinfo->oi_md->lsm_stripe_size);
1358
1359         cfs_list_for_each(pos, &set->set_list) {
1360                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1361
1362                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1363                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1364
1365                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1366                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1367                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1368
1369                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1370                                        &req->rq_oi, oti, rqset);
1371                 if (rc) {
1372                         CERROR("error: setattr objid "DOSTID" subobj"
1373                                DOSTID" on OST idx %d: rc = %d\n",
1374                                POSTID(&set->set_oi->oi_oa->o_oi),
1375                                POSTID(&req->rq_oi.oi_oa->o_oi),
1376                                req->rq_idx, rc);
1377                         break;
1378                 }
1379         }
1380
1381         /* If we are not waiting for responses on async requests, return. */
1382         if (rc || !rqset || cfs_list_empty(&rqset->set_requests)) {
1383                 int err;
1384                 if (rc)
1385                         cfs_atomic_set(&set->set_completes, 0);
1386                 err = lov_fini_setattr_set(set);
1387                 RETURN(rc ? rc : err);
1388         }
1389
1390         LASSERT(rqset->set_interpret == NULL);
1391         rqset->set_interpret = lov_setattr_interpret;
1392         rqset->set_arg = (void *)set;
1393
1394         RETURN(0);
1395 }
1396
1397 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1398                                void *data, int rc)
1399 {
1400         struct lov_request_set *lovset = (struct lov_request_set *)data;
1401         int err;
1402         ENTRY;
1403
1404         if (rc)
1405                 cfs_atomic_set(&lovset->set_completes, 0);
1406         err = lov_fini_punch_set(lovset);
1407         RETURN(rc ? rc : err);
1408 }
1409
1410 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1411  * we can send this 'punch' to just the authoritative node and the nodes
1412  * that the punch will affect. */
1413 static int lov_punch(const struct lu_env *env, struct obd_export *exp,
1414                      struct obd_info *oinfo, struct obd_trans_info *oti,
1415                      struct ptlrpc_request_set *rqset)
1416 {
1417         struct lov_request_set *set;
1418         struct lov_obd *lov;
1419         cfs_list_t *pos;
1420         struct lov_request *req;
1421         int rc = 0;
1422         ENTRY;
1423
1424         LASSERT(oinfo);
1425         ASSERT_LSM_MAGIC(oinfo->oi_md);
1426
1427         if (!exp || !exp->exp_obd)
1428                 RETURN(-ENODEV);
1429
1430         lov = &exp->exp_obd->u.lov;
1431         rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1432         if (rc)
1433                 RETURN(rc);
1434
1435         cfs_list_for_each (pos, &set->set_list) {
1436                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1437
1438                 rc = obd_punch(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1439                                &req->rq_oi, NULL, rqset);
1440                 if (rc) {
1441                         CERROR("%s: punch objid "DOSTID" subobj "DOSTID
1442                                " on OST idx %d: rc = %d\n",
1443                                exp->exp_obd->obd_name,
1444                                POSTID(&set->set_oi->oi_oa->o_oi),
1445                                POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx, rc);
1446                         break;
1447                 }
1448         }
1449
1450         if (rc || cfs_list_empty(&rqset->set_requests)) {
1451                 int err;
1452                 err = lov_fini_punch_set(set);
1453                 RETURN(rc ? rc : err);
1454         }
1455
1456         LASSERT(rqset->set_interpret == NULL);
1457         rqset->set_interpret = lov_punch_interpret;
1458         rqset->set_arg = (void *)set;
1459
1460         RETURN(0);
1461 }
1462
1463 static int lov_sync_interpret(struct ptlrpc_request_set *rqset,
1464                               void *data, int rc)
1465 {
1466         struct lov_request_set *lovset = data;
1467         int err;
1468         ENTRY;
1469
1470         if (rc)
1471                 cfs_atomic_set(&lovset->set_completes, 0);
1472         err = lov_fini_sync_set(lovset);
1473         RETURN(rc ?: err);
1474 }
1475
1476 static int lov_sync(const struct lu_env *env, struct obd_export *exp,
1477                     struct obd_info *oinfo, obd_off start, obd_off end,
1478                     struct ptlrpc_request_set *rqset)
1479 {
1480         struct lov_request_set *set = NULL;
1481         struct lov_obd *lov;
1482         cfs_list_t *pos;
1483         struct lov_request *req;
1484         int rc = 0;
1485         ENTRY;
1486
1487         ASSERT_LSM_MAGIC(oinfo->oi_md);
1488         LASSERT(rqset != NULL);
1489
1490         if (!exp->exp_obd)
1491                 RETURN(-ENODEV);
1492
1493         lov = &exp->exp_obd->u.lov;
1494         rc = lov_prep_sync_set(exp, oinfo, start, end, &set);
1495         if (rc)
1496                 RETURN(rc);
1497
1498         CDEBUG(D_INFO, "fsync objid "DOSTID" ["LPX64", "LPX64"]\n",
1499                POSTID(&set->set_oi->oi_oa->o_oi), start, end);
1500
1501         cfs_list_for_each (pos, &set->set_list) {
1502                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1503
1504                 rc = obd_sync(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1505                               &req->rq_oi, req->rq_oi.oi_policy.l_extent.start,
1506                               req->rq_oi.oi_policy.l_extent.end, rqset);
1507                 if (rc) {
1508                         CERROR("%s: fsync objid "DOSTID" subobj "DOSTID
1509                                " on OST idx %d: rc = %d\n",
1510                                exp->exp_obd->obd_name,
1511                                POSTID(&set->set_oi->oi_oa->o_oi),
1512                                POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx,
1513                                rc);
1514                         break;
1515                 }
1516         }
1517
1518         /* If we are not waiting for responses on async requests, return. */
1519         if (rc || cfs_list_empty(&rqset->set_requests)) {
1520                 int err = lov_fini_sync_set(set);
1521
1522                 RETURN(rc ?: err);
1523         }
1524
1525         LASSERT(rqset->set_interpret == NULL);
1526         rqset->set_interpret = lov_sync_interpret;
1527         rqset->set_arg = (void *)set;
1528
1529         RETURN(0);
1530 }
1531
1532 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1533                          obd_count oa_bufs, struct brw_page *pga)
1534 {
1535         struct obd_info oinfo = { { { 0 } } };
1536         int i, rc = 0;
1537
1538         oinfo.oi_oa = lov_oinfo->oi_oa;
1539
1540         /* The caller just wants to know if there's a chance that this
1541          * I/O can succeed */
1542         for (i = 0; i < oa_bufs; i++) {
1543                 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1544                 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1545                 obd_off start, end;
1546
1547                 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1548                                            pga[i].off + pga[i].count - 1,
1549                                            &start, &end))
1550                         continue;
1551
1552                 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1553                         CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1554                         return -EIO;
1555                 }
1556
1557                 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1558                              1, &pga[i], NULL);
1559                 if (rc)
1560                         break;
1561         }
1562         return rc;
1563 }
1564
1565 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1566                    obd_count oa_bufs, struct brw_page *pga,
1567                    struct obd_trans_info *oti)
1568 {
1569         struct lov_request_set *set;
1570         struct lov_request *req;
1571         cfs_list_t *pos;
1572         struct lov_obd *lov = &exp->exp_obd->u.lov;
1573         int err, rc = 0;
1574         ENTRY;
1575
1576         ASSERT_LSM_MAGIC(oinfo->oi_md);
1577
1578         if (cmd == OBD_BRW_CHECK) {
1579                 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1580                 RETURN(rc);
1581         }
1582
1583         rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1584         if (rc)
1585                 RETURN(rc);
1586
1587         cfs_list_for_each (pos, &set->set_list) {
1588                 struct obd_export *sub_exp;
1589                 struct brw_page *sub_pga;
1590                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1591
1592                 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1593                 sub_pga = set->set_pga + req->rq_pgaidx;
1594                 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1595                              sub_pga, oti);
1596                 if (rc)
1597                         break;
1598                 lov_update_common_set(set, req, rc);
1599         }
1600
1601         err = lov_fini_brw_set(set);
1602         if (!rc)
1603                 rc = err;
1604         RETURN(rc);
1605 }
1606
1607 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
1608                                  void *data, int rc)
1609 {
1610         struct lov_request_set *lovset = (struct lov_request_set *)data;
1611         ENTRY;
1612         rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
1613         RETURN(rc);
1614 }
1615
1616 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
1617                        struct ldlm_enqueue_info *einfo,
1618                        struct ptlrpc_request_set *rqset)
1619 {
1620         ldlm_mode_t mode = einfo->ei_mode;
1621         struct lov_request_set *set;
1622         struct lov_request *req;
1623         cfs_list_t *pos;
1624         struct lov_obd *lov;
1625         ldlm_error_t rc;
1626         ENTRY;
1627
1628         LASSERT(oinfo);
1629         ASSERT_LSM_MAGIC(oinfo->oi_md);
1630         LASSERT(mode == (mode & -mode));
1631
1632         /* we should never be asked to replay a lock this way. */
1633         LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
1634
1635         if (!exp || !exp->exp_obd)
1636                 RETURN(-ENODEV);
1637
1638         lov = &exp->exp_obd->u.lov;
1639         rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
1640         if (rc)
1641                 RETURN(rc);
1642
1643         cfs_list_for_each (pos, &set->set_list) {
1644                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1645
1646                 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
1647                                  &req->rq_oi, einfo, rqset);
1648                 if (rc != ELDLM_OK)
1649                         GOTO(out, rc);
1650         }
1651
1652         if (rqset && !cfs_list_empty(&rqset->set_requests)) {
1653                 LASSERT(rc == 0);
1654                 LASSERT(rqset->set_interpret == NULL);
1655                 rqset->set_interpret = lov_enqueue_interpret;
1656                 rqset->set_arg = (void *)set;
1657                 RETURN(rc);
1658         }
1659 out:
1660         rc = lov_fini_enqueue_set(set, mode, rc, rqset);
1661         RETURN(rc);
1662 }
1663
1664 static int lov_change_cbdata(struct obd_export *exp,
1665                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1666                              void *data)
1667 {
1668         struct lov_obd *lov;
1669         int rc = 0, i;
1670         ENTRY;
1671
1672         ASSERT_LSM_MAGIC(lsm);
1673
1674         if (!exp || !exp->exp_obd)
1675                 RETURN(-ENODEV);
1676
1677         lov = &exp->exp_obd->u.lov;
1678         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1679                 struct lov_stripe_md submd;
1680                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1681
1682                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1683                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1684                         continue;
1685                 }
1686
1687                 submd.lsm_oi = loi->loi_oi;
1688                 submd.lsm_stripe_count = 0;
1689                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1690                                        &submd, it, data);
1691         }
1692         RETURN(rc);
1693 }
1694
1695 /* find any ldlm lock of the inode in lov
1696  * return 0    not find
1697  *        1    find one
1698  *      < 0    error */
1699 static int lov_find_cbdata(struct obd_export *exp,
1700                            struct lov_stripe_md *lsm, ldlm_iterator_t it,
1701                            void *data)
1702 {
1703         struct lov_obd *lov;
1704         int rc = 0, i;
1705         ENTRY;
1706
1707         ASSERT_LSM_MAGIC(lsm);
1708
1709         if (!exp || !exp->exp_obd)
1710                 RETURN(-ENODEV);
1711
1712         lov = &exp->exp_obd->u.lov;
1713         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1714                 struct lov_stripe_md submd;
1715                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1716
1717                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1718                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1719                         continue;
1720                 }
1721                 submd.lsm_oi = loi->loi_oi;
1722                 submd.lsm_stripe_count = 0;
1723                 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1724                                      &submd, it, data);
1725                 if (rc != 0)
1726                         RETURN(rc);
1727         }
1728         RETURN(rc);
1729 }
1730
1731 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1732                       __u32 mode, struct lustre_handle *lockh)
1733 {
1734         struct lov_request_set *set;
1735         struct obd_info oinfo;
1736         struct lov_request *req;
1737         cfs_list_t *pos;
1738         struct lov_obd *lov;
1739         struct lustre_handle *lov_lockhp;
1740         int err = 0, rc = 0;
1741         ENTRY;
1742
1743         ASSERT_LSM_MAGIC(lsm);
1744
1745         if (!exp || !exp->exp_obd)
1746                 RETURN(-ENODEV);
1747
1748         LASSERT(lockh);
1749         lov = &exp->exp_obd->u.lov;
1750         rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
1751         if (rc)
1752                 RETURN(rc);
1753
1754         cfs_list_for_each(pos, &set->set_list) {
1755                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1756                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1757
1758                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
1759                                 req->rq_oi.oi_md, mode, lov_lockhp);
1760                 rc = lov_update_common_set(set, req, rc);
1761                 if (rc) {
1762                         CERROR("%s: cancel objid "DOSTID" subobj "
1763                                DOSTID" on OST idx %d: rc = %d\n",
1764                                exp->exp_obd->obd_name, POSTID(&lsm->lsm_oi),
1765                                POSTID(&req->rq_oi.oi_md->lsm_oi),
1766                                req->rq_idx, rc);
1767                         err = rc;
1768                 }
1769
1770         }
1771         lov_fini_cancel_set(set);
1772         RETURN(err);
1773 }
1774
1775 static int lov_cancel_unused(struct obd_export *exp,
1776                              struct lov_stripe_md *lsm,
1777                              ldlm_cancel_flags_t flags, void *opaque)
1778 {
1779         struct lov_obd *lov;
1780         int rc = 0, i;
1781         ENTRY;
1782
1783         if (!exp || !exp->exp_obd)
1784                 RETURN(-ENODEV);
1785
1786         lov = &exp->exp_obd->u.lov;
1787         if (lsm == NULL) {
1788                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1789                         int err;
1790                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1791                                 continue;
1792
1793                         err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
1794                                                 flags, opaque);
1795                         if (!rc)
1796                                 rc = err;
1797                 }
1798                 RETURN(rc);
1799         }
1800
1801         ASSERT_LSM_MAGIC(lsm);
1802
1803         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1804                 struct lov_stripe_md submd;
1805                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1806                 int idx = loi->loi_ost_idx;
1807                 int err;
1808
1809                 if (!lov->lov_tgts[idx]) {
1810                         CDEBUG(D_HA, "lov idx %d NULL\n", idx);
1811                         continue;
1812                 }
1813
1814                 if (!lov->lov_tgts[idx]->ltd_active)
1815                         CDEBUG(D_HA, "lov idx %d inactive\n", idx);
1816
1817                 submd.lsm_oi = loi->loi_oi;
1818                 submd.lsm_stripe_count = 0;
1819                 err = obd_cancel_unused(lov->lov_tgts[idx]->ltd_exp,
1820                                         &submd, flags, opaque);
1821                 if (err && lov->lov_tgts[idx]->ltd_active) {
1822                         CERROR("%s: cancel unused objid "DOSTID
1823                                " subobj "DOSTID" on OST idx %d: rc = %d\n",
1824                                exp->exp_obd->obd_name, POSTID(&lsm->lsm_oi),
1825                                POSTID(&loi->loi_oi), idx, err);
1826                         if (!rc)
1827                                 rc = err;
1828                 }
1829         }
1830         RETURN(rc);
1831 }
1832
1833 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1834 {
1835         struct lov_request_set *lovset = (struct lov_request_set *)data;
1836         int err;
1837         ENTRY;
1838
1839         if (rc)
1840                 cfs_atomic_set(&lovset->set_completes, 0);
1841
1842         err = lov_fini_statfs_set(lovset);
1843         RETURN(rc ? rc : err);
1844 }
1845
1846 static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
1847                             __u64 max_age, struct ptlrpc_request_set *rqset)
1848 {
1849         struct obd_device      *obd = class_exp2obd(exp);
1850         struct lov_request_set *set;
1851         struct lov_request *req;
1852         cfs_list_t *pos;
1853         struct lov_obd *lov;
1854         int rc = 0;
1855         ENTRY;
1856
1857         LASSERT(oinfo != NULL);
1858         LASSERT(oinfo->oi_osfs != NULL);
1859
1860         lov = &obd->u.lov;
1861         rc = lov_prep_statfs_set(obd, oinfo, &set);
1862         if (rc)
1863                 RETURN(rc);
1864
1865         cfs_list_for_each (pos, &set->set_list) {
1866                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1867                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1868                                       &req->rq_oi, max_age, rqset);
1869                 if (rc)
1870                         break;
1871         }
1872
1873         if (rc || cfs_list_empty(&rqset->set_requests)) {
1874                 int err;
1875                 if (rc)
1876                         cfs_atomic_set(&set->set_completes, 0);
1877                 err = lov_fini_statfs_set(set);
1878                 RETURN(rc ? rc : err);
1879         }
1880
1881         LASSERT(rqset->set_interpret == NULL);
1882         rqset->set_interpret = lov_statfs_interpret;
1883         rqset->set_arg = (void *)set;
1884         RETURN(0);
1885 }
1886
1887 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
1888                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1889 {
1890         struct ptlrpc_request_set *set = NULL;
1891         struct obd_info oinfo = { { { 0 } } };
1892         int rc = 0;
1893         ENTRY;
1894
1895
1896         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1897          * statfs requests */
1898         set = ptlrpc_prep_set();
1899         if (set == NULL)
1900                 RETURN(-ENOMEM);
1901
1902         oinfo.oi_osfs = osfs;
1903         oinfo.oi_flags = flags;
1904         rc = lov_statfs_async(exp, &oinfo, max_age, set);
1905         if (rc == 0)
1906                 rc = ptlrpc_set_wait(set);
1907         ptlrpc_set_destroy(set);
1908
1909         RETURN(rc);
1910 }
1911
1912 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1913                          void *karg, void *uarg)
1914 {
1915         struct obd_device *obddev = class_exp2obd(exp);
1916         struct lov_obd *lov = &obddev->u.lov;
1917         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1918         struct obd_uuid *uuidp;
1919         ENTRY;
1920
1921         switch (cmd) {
1922         case IOC_OBD_STATFS: {
1923                 struct obd_ioctl_data *data = karg;
1924                 struct obd_device *osc_obd;
1925                 struct obd_statfs stat_buf = {0};
1926                 __u32 index;
1927                 __u32 flags;
1928
1929                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1930                 if ((index >= count))
1931                         RETURN(-ENODEV);
1932
1933                 if (!lov->lov_tgts[index])
1934                         /* Try again with the next index */
1935                         RETURN(-EAGAIN);
1936                 if (!lov->lov_tgts[index]->ltd_active)
1937                         RETURN(-ENODATA);
1938
1939                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1940                 if (!osc_obd)
1941                         RETURN(-EINVAL);
1942
1943                 /* copy UUID */
1944                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1945                                  min((int)data->ioc_plen2,
1946                                      (int)sizeof(struct obd_uuid))))
1947                         RETURN(-EFAULT);
1948
1949                 flags = uarg ? *(__u32*)uarg : 0;
1950                 /* got statfs data */
1951                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1952                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1953                                 flags);
1954                 if (rc)
1955                         RETURN(rc);
1956                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1957                                      min((int) data->ioc_plen1,
1958                                          (int) sizeof(stat_buf))))
1959                         RETURN(-EFAULT);
1960                 break;
1961         }
1962         case OBD_IOC_LOV_GET_CONFIG: {
1963                 struct obd_ioctl_data *data;
1964                 struct lov_desc *desc;
1965                 char *buf = NULL;
1966                 __u32 *genp;
1967
1968                 len = 0;
1969                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1970                         RETURN(-EINVAL);
1971
1972                 data = (struct obd_ioctl_data *)buf;
1973
1974                 if (sizeof(*desc) > data->ioc_inllen1) {
1975                         obd_ioctl_freedata(buf, len);
1976                         RETURN(-EINVAL);
1977                 }
1978
1979                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1980                         obd_ioctl_freedata(buf, len);
1981                         RETURN(-EINVAL);
1982                 }
1983
1984                 if (sizeof(__u32) * count > data->ioc_inllen3) {
1985                         obd_ioctl_freedata(buf, len);
1986                         RETURN(-EINVAL);
1987                 }
1988
1989                 desc = (struct lov_desc *)data->ioc_inlbuf1;
1990                 memcpy(desc, &(lov->desc), sizeof(*desc));
1991
1992                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1993                 genp = (__u32 *)data->ioc_inlbuf3;
1994                 /* the uuid will be empty for deleted OSTs */
1995                 for (i = 0; i < count; i++, uuidp++, genp++) {
1996                         if (!lov->lov_tgts[i])
1997                                 continue;
1998                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
1999                         *genp = lov->lov_tgts[i]->ltd_gen;
2000                 }
2001
2002                 if (copy_to_user((void *)uarg, buf, len))
2003                         rc = -EFAULT;
2004                 obd_ioctl_freedata(buf, len);
2005                 break;
2006         }
2007         case LL_IOC_LOV_SETSTRIPE:
2008                 rc = lov_setstripe(exp, len, karg, uarg);
2009                 break;
2010         case LL_IOC_LOV_GETSTRIPE:
2011                 rc = lov_getstripe(exp, karg, uarg);
2012                 break;
2013         case LL_IOC_LOV_SETEA:
2014                 rc = lov_setea(exp, karg, uarg);
2015                 break;
2016         case OBD_IOC_QUOTACTL: {
2017                 struct if_quotactl *qctl = karg;
2018                 struct lov_tgt_desc *tgt = NULL;
2019                 struct obd_quotactl *oqctl;
2020
2021                 if (qctl->qc_valid == QC_OSTIDX) {
2022                         if (count <= qctl->qc_idx)
2023                                 RETURN(-EINVAL);
2024
2025                         tgt = lov->lov_tgts[qctl->qc_idx];
2026                         if (!tgt || !tgt->ltd_exp)
2027                                 RETURN(-EINVAL);
2028                 } else if (qctl->qc_valid == QC_UUID) {
2029                         for (i = 0; i < count; i++) {
2030                                 tgt = lov->lov_tgts[i];
2031                                 if (!tgt ||
2032                                     !obd_uuid_equals(&tgt->ltd_uuid,
2033                                                      &qctl->obd_uuid))
2034                                         continue;
2035
2036                                 if (tgt->ltd_exp == NULL)
2037                                         RETURN(-EINVAL);
2038
2039                                 break;
2040                         }
2041                 } else {
2042                         RETURN(-EINVAL);
2043                 }
2044
2045                 if (i >= count)
2046                         RETURN(-EAGAIN);
2047
2048                 LASSERT(tgt && tgt->ltd_exp);
2049                 OBD_ALLOC_PTR(oqctl);
2050                 if (!oqctl)
2051                         RETURN(-ENOMEM);
2052
2053                 QCTL_COPY(oqctl, qctl);
2054                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2055                 if (rc == 0) {
2056                         QCTL_COPY(qctl, oqctl);
2057                         qctl->qc_valid = QC_OSTIDX;
2058                         qctl->obd_uuid = tgt->ltd_uuid;
2059                 }
2060                 OBD_FREE_PTR(oqctl);
2061                 break;
2062         }
2063         default: {
2064                 int set = 0;
2065
2066                 if (count == 0)
2067                         RETURN(-ENOTTY);
2068
2069                 for (i = 0; i < count; i++) {
2070                         int err;
2071                         struct obd_device *osc_obd;
2072
2073                         /* OST was disconnected */
2074                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2075                                 continue;
2076
2077                         /* ll_umount_begin() sets force flag but for lov, not
2078                          * osc. Let's pass it through */
2079                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
2080                         osc_obd->obd_force = obddev->obd_force;
2081                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2082                                             len, karg, uarg);
2083                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2084                                 RETURN(err);
2085                         } else if (err) {
2086                                 if (lov->lov_tgts[i]->ltd_active) {
2087                                         CDEBUG(err == -ENOTTY ?
2088                                                D_IOCTL : D_WARNING,
2089                                                "iocontrol OSC %s on OST "
2090                                                "idx %d cmd %x: err = %d\n",
2091                                                lov_uuid2str(lov, i),
2092                                                i, cmd, err);
2093                                         if (!rc)
2094                                                 rc = err;
2095                                 }
2096                         } else {
2097                                 set = 1;
2098                         }
2099                 }
2100                 if (!set && !rc)
2101                         rc = -EIO;
2102         }
2103         }
2104
2105         RETURN(rc);
2106 }
2107
2108 #define FIEMAP_BUFFER_SIZE 4096
2109
2110 /**
2111  * Non-zero fe_logical indicates that this is a continuation FIEMAP
2112  * call. The local end offset and the device are sent in the first
2113  * fm_extent. This function calculates the stripe number from the index.
2114  * This function returns a stripe_no on which mapping is to be restarted.
2115  *
2116  * This function returns fm_end_offset which is the in-OST offset at which
2117  * mapping should be restarted. If fm_end_offset=0 is returned then caller
2118  * will re-calculate proper offset in next stripe.
2119  * Note that the first extent is passed to lov_get_info via the value field.
2120  *
2121  * \param fiemap fiemap request header
2122  * \param lsm striping information for the file
2123  * \param fm_start logical start of mapping
2124  * \param fm_end logical end of mapping
2125  * \param start_stripe starting stripe will be returned in this
2126  */
2127 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
2128                                    struct lov_stripe_md *lsm, obd_size fm_start,
2129                                    obd_size fm_end, int *start_stripe)
2130 {
2131         obd_size local_end = fiemap->fm_extents[0].fe_logical;
2132         obd_off lun_start, lun_end;
2133         obd_size fm_end_offset;
2134         int stripe_no = -1, i;
2135
2136         if (fiemap->fm_extent_count == 0 ||
2137             fiemap->fm_extents[0].fe_logical == 0)
2138                 return 0;
2139
2140         /* Find out stripe_no from ost_index saved in the fe_device */
2141         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2142                 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
2143                                         fiemap->fm_extents[0].fe_device) {
2144                         stripe_no = i;
2145                         break;
2146                 }
2147         }
2148         if (stripe_no == -1)
2149                 return -EINVAL;
2150
2151         /* If we have finished mapping on previous device, shift logical
2152          * offset to start of next device */
2153         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
2154                                    &lun_start, &lun_end)) != 0 &&
2155                                    local_end < lun_end) {
2156                 fm_end_offset = local_end;
2157                 *start_stripe = stripe_no;
2158         } else {
2159                 /* This is a special value to indicate that caller should
2160                  * calculate offset in next stripe. */
2161                 fm_end_offset = 0;
2162                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
2163         }
2164
2165         return fm_end_offset;
2166 }
2167
2168 /**
2169  * We calculate on which OST the mapping will end. If the length of mapping
2170  * is greater than (stripe_size * stripe_count) then the last_stripe will
2171  * will be one just before start_stripe. Else we check if the mapping
2172  * intersects each OST and find last_stripe.
2173  * This function returns the last_stripe and also sets the stripe_count
2174  * over which the mapping is spread
2175  *
2176  * \param lsm striping information for the file
2177  * \param fm_start logical start of mapping
2178  * \param fm_end logical end of mapping
2179  * \param start_stripe starting stripe of the mapping
2180  * \param stripe_count the number of stripes across which to map is returned
2181  *
2182  * \retval last_stripe return the last stripe of the mapping
2183  */
2184 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
2185                             obd_size fm_end, int start_stripe,
2186                             int *stripe_count)
2187 {
2188         int last_stripe;
2189         obd_off obd_start, obd_end;
2190         int i, j;
2191
2192         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
2193                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
2194                                                               start_stripe - 1);
2195                 *stripe_count = lsm->lsm_stripe_count;
2196         } else {
2197                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
2198                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
2199                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
2200                                                    &obd_start, &obd_end)) == 0)
2201                                 break;
2202                 }
2203                 *stripe_count = j;
2204                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
2205         }
2206
2207         return last_stripe;
2208 }
2209
2210 /**
2211  * Set fe_device and copy extents from local buffer into main return buffer.
2212  *
2213  * \param fiemap fiemap request header
2214  * \param lcl_fm_ext array of local fiemap extents to be copied
2215  * \param ost_index OST index to be written into the fm_device field for each
2216                     extent
2217  * \param ext_count number of extents to be copied
2218  * \param current_extent where to start copying in main extent array
2219  */
2220 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
2221                                   struct ll_fiemap_extent *lcl_fm_ext,
2222                                   int ost_index, unsigned int ext_count,
2223                                   int current_extent)
2224 {
2225         char *to;
2226         int ext;
2227
2228         for (ext = 0; ext < ext_count; ext++) {
2229                 lcl_fm_ext[ext].fe_device = ost_index;
2230                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
2231         }
2232
2233         /* Copy fm_extent's from fm_local to return buffer */
2234         to = (char *)fiemap + fiemap_count_to_size(current_extent);
2235         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
2236 }
2237
2238 /**
2239  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
2240  * This also handles the restarting of FIEMAP calls in case mapping overflows
2241  * the available number of extents in single call.
2242  */
2243 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
2244                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
2245 {
2246         struct ll_fiemap_info_key *fm_key = key;
2247         struct ll_user_fiemap *fiemap = val;
2248         struct ll_user_fiemap *fm_local = NULL;
2249         struct ll_fiemap_extent *lcl_fm_ext;
2250         int count_local;
2251         unsigned int get_num_extents = 0;
2252         int ost_index = 0, actual_start_stripe, start_stripe;
2253         obd_size fm_start, fm_end, fm_length, fm_end_offset;
2254         obd_size curr_loc;
2255         int current_extent = 0, rc = 0, i;
2256         int ost_eof = 0; /* EOF for object */
2257         int ost_done = 0; /* done with required mapping for this OST? */
2258         int last_stripe;
2259         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
2260         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
2261
2262         if (!lsm_has_objects(lsm)) {
2263                 if (lsm && lsm_is_released(lsm) && (fm_key->fiemap.fm_start <
2264                     fm_key->oa.o_size)) {
2265                         /* released file, return a minimal FIEMAP if
2266                          * request fits in file-size.
2267                          */
2268                         fiemap->fm_mapped_extents = 1;
2269                         fiemap->fm_extents[0].fe_logical =
2270                                                 fm_key->fiemap.fm_start;
2271                         if (fm_key->fiemap.fm_start + fm_key->fiemap.fm_length <
2272                             fm_key->oa.o_size)
2273                                 fiemap->fm_extents[0].fe_length =
2274                                                 fm_key->fiemap.fm_length;
2275                         else
2276                                 fiemap->fm_extents[0].fe_length =
2277                                                 fm_key->oa.o_size -
2278                                                 fm_key->fiemap.fm_start;
2279                         fiemap->fm_extents[0].fe_flags |=
2280                                                 (FIEMAP_EXTENT_UNKNOWN |
2281                                                  FIEMAP_EXTENT_LAST);
2282                 }
2283                 GOTO(out, rc = 0);
2284         }
2285
2286         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
2287                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
2288
2289         OBD_ALLOC_LARGE(fm_local, buffer_size);
2290         if (fm_local == NULL)
2291                 GOTO(out, rc = -ENOMEM);
2292         lcl_fm_ext = &fm_local->fm_extents[0];
2293
2294         count_local = fiemap_size_to_count(buffer_size);
2295
2296         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
2297         fm_start = fiemap->fm_start;
2298         fm_length = fiemap->fm_length;
2299         /* Calculate start stripe, last stripe and length of mapping */
2300         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
2301         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
2302                                                 fm_start + fm_length - 1);
2303         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
2304         if (fm_end > fm_key->oa.o_size)
2305                 fm_end = fm_key->oa.o_size;
2306
2307         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
2308                                             actual_start_stripe, &stripe_count);
2309
2310         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start,
2311                                                   fm_end, &start_stripe);
2312         if (fm_end_offset == -EINVAL)
2313                 GOTO(out, rc = -EINVAL);
2314
2315         if (fiemap->fm_extent_count == 0) {
2316                 get_num_extents = 1;
2317                 count_local = 0;
2318         }
2319
2320         /* Check each stripe */
2321         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
2322              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
2323                 obd_size req_fm_len; /* Stores length of required mapping */
2324                 obd_size len_mapped_single_call;
2325                 obd_off lun_start, lun_end, obd_object_end;
2326                 unsigned int ext_count;
2327
2328                 cur_stripe_wrap = cur_stripe;
2329
2330                 /* Find out range of mapping on this stripe */
2331                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
2332                                            &lun_start, &obd_object_end)) == 0)
2333                         continue;
2334
2335                 /* If this is a continuation FIEMAP call and we are on
2336                  * starting stripe then lun_start needs to be set to
2337                  * fm_end_offset */
2338                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
2339                         lun_start = fm_end_offset;
2340
2341                 if (fm_length != ~0ULL) {
2342                         /* Handle fm_start + fm_length overflow */
2343                         if (fm_start + fm_length < fm_start)
2344                                 fm_length = ~0ULL - fm_start;
2345                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
2346                                                      cur_stripe);
2347                 } else {
2348                         lun_end = ~0ULL;
2349                 }
2350
2351                 if (lun_start == lun_end)
2352                         continue;
2353
2354                 req_fm_len = obd_object_end - lun_start;
2355                 fm_local->fm_length = 0;
2356                 len_mapped_single_call = 0;
2357
2358                 /* If the output buffer is very large and the objects have many
2359                  * extents we may need to loop on a single OST repeatedly */
2360                 ost_eof = 0;
2361                 ost_done = 0;
2362                 do {
2363                         if (get_num_extents == 0) {
2364                                 /* Don't get too many extents. */
2365                                 if (current_extent + count_local >
2366                                     fiemap->fm_extent_count)
2367                                         count_local = fiemap->fm_extent_count -
2368                                                                  current_extent;
2369                         }
2370
2371                         lun_start += len_mapped_single_call;
2372                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
2373                         req_fm_len = fm_local->fm_length;
2374                         fm_local->fm_extent_count = count_local;
2375                         fm_local->fm_mapped_extents = 0;
2376                         fm_local->fm_flags = fiemap->fm_flags;
2377
2378                         fm_key->oa.o_oi = lsm->lsm_oinfo[cur_stripe]->loi_oi;
2379                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
2380
2381                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
2382                                 GOTO(out, rc = -EINVAL);
2383
2384                         /* If OST is inactive, return extent with UNKNOWN flag */
2385                         if (!lov->lov_tgts[ost_index]->ltd_active) {
2386                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
2387                                 fm_local->fm_mapped_extents = 1;
2388
2389                                 lcl_fm_ext[0].fe_logical = lun_start;
2390                                 lcl_fm_ext[0].fe_length = obd_object_end -
2391                                                                       lun_start;
2392                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
2393
2394                                 goto inactive_tgt;
2395                         }
2396
2397                         fm_local->fm_start = lun_start;
2398                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
2399                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
2400                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
2401                         rc = obd_get_info(NULL,
2402                                           lov->lov_tgts[ost_index]->ltd_exp,
2403                                           keylen, key, vallen, fm_local, lsm);
2404                         if (rc != 0)
2405                                 GOTO(out, rc);
2406
2407 inactive_tgt:
2408                         ext_count = fm_local->fm_mapped_extents;
2409                         if (ext_count == 0) {
2410                                 ost_done = 1;
2411                                 /* If last stripe has hole at the end,
2412                                  * then we need to return */
2413                                 if (cur_stripe_wrap == last_stripe) {
2414                                         fiemap->fm_mapped_extents = 0;
2415                                         goto finish;
2416                                 }
2417                                 break;
2418                         }
2419
2420                         /* If we just need num of extents then go to next device */
2421                         if (get_num_extents) {
2422                                 current_extent += ext_count;
2423                                 break;
2424                         }
2425
2426                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2427                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2428
2429                         /* Have we finished mapping on this device? */
2430                         if (req_fm_len <= len_mapped_single_call)
2431                                 ost_done = 1;
2432
2433                         /* Clear the EXTENT_LAST flag which can be present on
2434                          * last extent */
2435                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2436                                 lcl_fm_ext[ext_count - 1].fe_flags &=
2437                                                             ~FIEMAP_EXTENT_LAST;
2438
2439                         curr_loc = lov_stripe_size(lsm,
2440                                            lcl_fm_ext[ext_count - 1].fe_logical+
2441                                            lcl_fm_ext[ext_count - 1].fe_length,
2442                                            cur_stripe);
2443                         if (curr_loc >= fm_key->oa.o_size)
2444                                 ost_eof = 1;
2445
2446                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2447                                                      ost_index, ext_count,
2448                                                      current_extent);
2449
2450                         current_extent += ext_count;
2451
2452                         /* Ran out of available extents? */
2453                         if (current_extent >= fiemap->fm_extent_count)
2454                                 goto finish;
2455                 } while (ost_done == 0 && ost_eof == 0);
2456
2457                 if (cur_stripe_wrap == last_stripe)
2458                         goto finish;
2459         }
2460
2461 finish:
2462         /* Indicate that we are returning device offsets unless file just has
2463          * single stripe */
2464         if (lsm->lsm_stripe_count > 1)
2465                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2466
2467         if (get_num_extents)
2468                 goto skip_last_device_calc;
2469
2470         /* Check if we have reached the last stripe and whether mapping for that
2471          * stripe is done. */
2472         if (cur_stripe_wrap == last_stripe) {
2473                 if (ost_done || ost_eof)
2474                         fiemap->fm_extents[current_extent - 1].fe_flags |=
2475                                                              FIEMAP_EXTENT_LAST;
2476         }
2477
2478 skip_last_device_calc:
2479         fiemap->fm_mapped_extents = current_extent;
2480
2481 out:
2482         if (fm_local)
2483                 OBD_FREE_LARGE(fm_local, buffer_size);
2484         return rc;
2485 }
2486
2487 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
2488                         __u32 keylen, void *key, __u32 *vallen, void *val,
2489                         struct lov_stripe_md *lsm)
2490 {
2491         struct obd_device *obddev = class_exp2obd(exp);
2492         struct lov_obd *lov = &obddev->u.lov;
2493         int i, rc;
2494         ENTRY;
2495
2496         if (!vallen || !val)
2497                 RETURN(-EFAULT);
2498
2499         obd_getref(obddev);
2500
2501         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2502                 struct {
2503                         char name[16];
2504                         struct ldlm_lock *lock;
2505                 } *data = key;
2506                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2507                 struct lov_oinfo *loi;
2508                 __u32 *stripe = val;
2509
2510                 if (*vallen < sizeof(*stripe))
2511                         GOTO(out, rc = -EFAULT);
2512                 *vallen = sizeof(*stripe);
2513
2514                 /* XXX This is another one of those bits that will need to
2515                  * change if we ever actually support nested LOVs.  It uses
2516                  * the lock's export to find out which stripe it is. */
2517                 /* XXX - it's assumed all the locks for deleted OSTs have
2518                  * been cancelled. Also, the export for deleted OSTs will
2519                  * be NULL and won't match the lock's export. */
2520                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2521                         loi = lsm->lsm_oinfo[i];
2522                         if (!lov->lov_tgts[loi->loi_ost_idx])
2523                                 continue;
2524                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2525                             data->lock->l_conn_export &&
2526                             ostid_res_name_eq(&loi->loi_oi, res_id)) {
2527                                 *stripe = i;
2528                                 GOTO(out, rc = 0);
2529                         }
2530                 }
2531                 LDLM_ERROR(data->lock, "lock on inode without such object");
2532                 dump_lsm(D_ERROR, lsm);
2533                 GOTO(out, rc = -ENXIO);
2534         } else if (KEY_IS(KEY_LAST_ID)) {
2535                 struct obd_id_info *info = val;
2536                 __u32 size = sizeof(obd_id);
2537                 struct lov_tgt_desc *tgt;
2538
2539                 LASSERT(*vallen == sizeof(struct obd_id_info));
2540                 tgt = lov->lov_tgts[info->idx];
2541
2542                 if (!tgt || !tgt->ltd_active)
2543                         GOTO(out, rc = -ESRCH);
2544
2545                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
2546                                   &size, info->data, NULL);
2547                 GOTO(out, rc = 0);
2548         } else if (KEY_IS(KEY_LOVDESC)) {
2549                 struct lov_desc *desc_ret = val;
2550                 *desc_ret = lov->desc;
2551
2552                 GOTO(out, rc = 0);
2553         } else if (KEY_IS(KEY_FIEMAP)) {
2554                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2555                 GOTO(out, rc);
2556         } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2557                 struct lov_tgt_desc *tgt;
2558                 __u64 ost_idx = *((__u64*)val);
2559
2560                 LASSERT(*vallen == sizeof(__u64));
2561                 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2562                 tgt = lov->lov_tgts[ost_idx];
2563
2564                 if (!tgt || !tgt->ltd_exp)
2565                         GOTO(out, rc = -ESRCH);
2566
2567                 *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp);
2568                 GOTO(out, rc = 0);
2569         } else if (KEY_IS(KEY_TGT_COUNT)) {
2570                 *((int *)val) = lov->desc.ld_tgt_count;
2571                 GOTO(out, rc = 0);
2572         }
2573
2574         rc = -EINVAL;
2575
2576 out:
2577         obd_putref(obddev);
2578         RETURN(rc);
2579 }
2580
2581 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
2582                               obd_count keylen, void *key, obd_count vallen,
2583                               void *val, struct ptlrpc_request_set *set)
2584 {
2585         struct obd_device *obddev = class_exp2obd(exp);
2586         struct lov_obd *lov = &obddev->u.lov;
2587         obd_count count;
2588         int i, rc = 0, err;
2589         struct lov_tgt_desc *tgt;
2590         unsigned incr, check_uuid,
2591                  do_inactive, no_set;
2592         unsigned next_id = 0,  mds_con = 0, capa = 0;
2593         ENTRY;
2594
2595         incr = check_uuid = do_inactive = no_set = 0;
2596         if (set == NULL) {
2597                 no_set = 1;
2598                 set = ptlrpc_prep_set();
2599                 if (!set)
2600                         RETURN(-ENOMEM);
2601         }
2602
2603         obd_getref(obddev);
2604         count = lov->desc.ld_tgt_count;
2605
2606         if (KEY_IS(KEY_NEXT_ID)) {
2607                 count = vallen / sizeof(struct obd_id_info);
2608                 vallen = sizeof(obd_id);
2609                 incr = sizeof(struct obd_id_info);
2610                 do_inactive = 1;
2611                 next_id = 1;
2612         } else if (KEY_IS(KEY_CHECKSUM)) {
2613                 do_inactive = 1;
2614         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2615                 /* use defaults:  do_inactive = incr = 0; */
2616         } else if (KEY_IS(KEY_MDS_CONN)) {
2617                 mds_con = 1;
2618         } else if (KEY_IS(KEY_CAPA_KEY)) {
2619                 capa = 1;
2620         } else if (KEY_IS(KEY_CACHE_SET)) {
2621                 LASSERT(lov->lov_cache == NULL);
2622                 lov->lov_cache = val;
2623                 do_inactive = 1;
2624         }
2625
2626         for (i = 0; i < count; i++, val = (char *)val + incr) {
2627                 if (next_id) {
2628                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2629                 } else {
2630                         tgt = lov->lov_tgts[i];
2631                 }
2632                 /* OST was disconnected */
2633                 if (!tgt || !tgt->ltd_exp)
2634                         continue;
2635
2636                 /* OST is inactive and we don't want inactive OSCs */
2637                 if (!tgt->ltd_active && !do_inactive)
2638                         continue;
2639
2640                 if (mds_con) {
2641                         struct mds_group_info *mgi;
2642
2643                         LASSERT(vallen == sizeof(*mgi));
2644                         mgi = (struct mds_group_info *)val;
2645
2646                         /* Only want a specific OSC */
2647                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2648                                                 &tgt->ltd_uuid))
2649                                 continue;
2650
2651                         err = obd_set_info_async(env, tgt->ltd_exp,
2652                                          keylen, key, sizeof(int),
2653                                          &mgi->group, set);
2654                 } else if (next_id) {
2655                         err = obd_set_info_async(env, tgt->ltd_exp,
2656                                          keylen, key, vallen,
2657                                          ((struct obd_id_info*)val)->data, set);
2658                 } else if (capa) {
2659                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2660
2661                         LASSERT(vallen == sizeof(*info));
2662
2663                          /* Only want a specific OSC */
2664                         if (info->uuid &&
2665                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2666                                 continue;
2667
2668                         err = obd_set_info_async(env, tgt->ltd_exp, keylen,
2669                                                  key, sizeof(*info->capa),
2670                                                  info->capa, set);
2671                 } else {
2672                         /* Only want a specific OSC */
2673                         if (check_uuid &&
2674                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2675                                 continue;
2676
2677                         err = obd_set_info_async(env, tgt->ltd_exp,
2678                                          keylen, key, vallen, val, set);
2679                 }
2680
2681                 if (!rc)
2682                         rc = err;
2683         }
2684
2685         obd_putref(obddev);
2686         if (no_set) {
2687                 err = ptlrpc_set_wait(set);
2688                 if (!rc)
2689                         rc = err;
2690                 ptlrpc_set_destroy(set);
2691         }
2692         RETURN(rc);
2693 }
2694
2695 static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm,
2696                            int cmd, __u64 *offset)
2697 {
2698         __u32 ssize = lsm->lsm_stripe_size;
2699         __u64 start;
2700
2701         start = *offset;
2702         lov_do_div64(start, ssize);
2703         start = start * ssize;
2704
2705         CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64
2706                            ", end "LPU64"\n", *offset, ssize, start,
2707                            start + ssize - 1);
2708         if (cmd == OBD_CALC_STRIPE_END) {
2709                 *offset = start + ssize - 1;
2710         } else if (cmd == OBD_CALC_STRIPE_START) {
2711                 *offset = start;
2712         } else {
2713                 LBUG();
2714         }
2715
2716         RETURN(0);
2717 }
2718
2719 void lov_stripe_lock(struct lov_stripe_md *md)
2720 {
2721         LASSERT(md->lsm_lock_owner != current_pid());
2722         spin_lock(&md->lsm_lock);
2723         LASSERT(md->lsm_lock_owner == 0);
2724         md->lsm_lock_owner = current_pid();
2725 }
2726 EXPORT_SYMBOL(lov_stripe_lock);
2727
2728 void lov_stripe_unlock(struct lov_stripe_md *md)
2729 {
2730         LASSERT(md->lsm_lock_owner == current_pid());
2731         md->lsm_lock_owner = 0;
2732         spin_unlock(&md->lsm_lock);
2733 }
2734 EXPORT_SYMBOL(lov_stripe_unlock);
2735
2736 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
2737                         struct obd_quotactl *oqctl)
2738 {
2739         struct lov_obd      *lov = &obd->u.lov;
2740         struct lov_tgt_desc *tgt;
2741         __u64                curspace = 0;
2742         __u64                bhardlimit = 0;
2743         int                  i, rc = 0;
2744         ENTRY;
2745
2746         if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON &&
2747             oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF &&
2748             oqctl->qc_cmd != Q_GETOQUOTA &&
2749             oqctl->qc_cmd != Q_INITQUOTA &&
2750             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
2751             oqctl->qc_cmd != Q_FINVALIDATE) {
2752                 CERROR("bad quota opc %x for lov obd", oqctl->qc_cmd);
2753                 RETURN(-EFAULT);
2754         }
2755
2756         /* for lov tgt */
2757         obd_getref(obd);
2758         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2759                 int err;
2760
2761                 tgt = lov->lov_tgts[i];
2762
2763                 if (!tgt)
2764                         continue;
2765
2766                 if (!tgt->ltd_active || tgt->ltd_reap) {
2767                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
2768                             lov->lov_tgts[i]->ltd_activate) {
2769                                 rc = -EREMOTEIO;
2770                                 CERROR("ost %d is inactive\n", i);
2771                         } else {
2772                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
2773                         }
2774                         continue;
2775                 }
2776
2777                 err = obd_quotactl(tgt->ltd_exp, oqctl);
2778                 if (err) {
2779                         if (tgt->ltd_active && !rc)
2780                                 rc = err;
2781                         continue;
2782                 }
2783
2784                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2785                         curspace += oqctl->qc_dqblk.dqb_curspace;
2786                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
2787                 }
2788         }
2789         obd_putref(obd);
2790
2791         if (oqctl->qc_cmd == Q_GETOQUOTA) {
2792                 oqctl->qc_dqblk.dqb_curspace = curspace;
2793                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
2794         }
2795         RETURN(rc);
2796 }
2797
2798 static int lov_quotacheck(struct obd_device *obd, struct obd_export *exp,
2799                           struct obd_quotactl *oqctl)
2800 {
2801         struct lov_obd *lov = &obd->u.lov;
2802         int             i, rc = 0;
2803         ENTRY;
2804
2805         obd_getref(obd);
2806
2807         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2808                 if (!lov->lov_tgts[i])
2809                         continue;
2810
2811                 /* Skip quota check on the administratively disabled OSTs. */
2812                 if (!lov->lov_tgts[i]->ltd_activate) {
2813                         CWARN("lov idx %d was administratively disabled, "
2814                               "skip quotacheck on it.\n", i);
2815                         continue;
2816                 }
2817
2818                 if (!lov->lov_tgts[i]->ltd_active) {
2819                         CERROR("lov idx %d inactive\n", i);
2820                         rc = -EIO;
2821                         goto out;
2822                 }
2823         }
2824
2825         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2826                 int err;
2827
2828                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate)
2829                         continue;
2830
2831                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
2832                 if (err && !rc)
2833                         rc = err;
2834         }
2835
2836 out:
2837         obd_putref(obd);
2838
2839         RETURN(rc);
2840 }
2841
2842 struct obd_ops lov_obd_ops = {
2843         .o_owner               = THIS_MODULE,
2844         .o_setup               = lov_setup,
2845         .o_precleanup          = lov_precleanup,
2846         .o_cleanup             = lov_cleanup,
2847         //.o_process_config      = lov_process_config,
2848         .o_connect             = lov_connect,
2849         .o_disconnect          = lov_disconnect,
2850         .o_statfs              = lov_statfs,
2851         .o_statfs_async        = lov_statfs_async,
2852         .o_packmd              = lov_packmd,
2853         .o_unpackmd            = lov_unpackmd,
2854         .o_create              = lov_create,
2855         .o_destroy             = lov_destroy,
2856         .o_getattr             = lov_getattr,
2857         .o_getattr_async       = lov_getattr_async,
2858         .o_setattr             = lov_setattr,
2859         .o_setattr_async       = lov_setattr_async,
2860         .o_brw                 = lov_brw,
2861         .o_merge_lvb           = lov_merge_lvb,
2862         .o_adjust_kms          = lov_adjust_kms,
2863         .o_punch               = lov_punch,
2864         .o_sync                = lov_sync,
2865         .o_enqueue             = lov_enqueue,
2866         .o_change_cbdata       = lov_change_cbdata,
2867         .o_find_cbdata         = lov_find_cbdata,
2868         .o_cancel              = lov_cancel,
2869         .o_cancel_unused       = lov_cancel_unused,
2870         .o_iocontrol           = lov_iocontrol,
2871         .o_get_info            = lov_get_info,
2872         .o_set_info_async      = lov_set_info_async,
2873         .o_extent_calc         = lov_extent_calc,
2874         .o_llog_init           = lov_llog_init,
2875         .o_llog_finish         = lov_llog_finish,
2876         .o_notify              = lov_notify,
2877         .o_pool_new            = lov_pool_new,
2878         .o_pool_rem            = lov_pool_remove,
2879         .o_pool_add            = lov_pool_add,
2880         .o_pool_del            = lov_pool_del,
2881         .o_getref              = lov_getref,
2882         .o_putref              = lov_putref,
2883         .o_quotactl            = lov_quotactl,
2884         .o_quotacheck          = lov_quotacheck,
2885 };
2886
2887 struct kmem_cache *lov_oinfo_slab;
2888
2889 extern struct lu_kmem_descr lov_caches[];
2890
2891 int __init lov_init(void)
2892 {
2893         int rc;
2894         ENTRY;
2895
2896         /* print an address of _any_ initialized kernel symbol from this
2897          * module, to allow debugging with gdb that doesn't support data
2898          * symbols from modules.*/
2899         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
2900
2901         rc = lu_kmem_init(lov_caches);
2902         if (rc)
2903                 return rc;
2904
2905         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
2906                                            sizeof(struct lov_oinfo), 0,
2907                                            SLAB_HWCACHE_ALIGN, NULL);
2908         if (lov_oinfo_slab == NULL) {
2909                 lu_kmem_fini(lov_caches);
2910                 return -ENOMEM;
2911         }
2912
2913         rc = class_register_type(&lov_obd_ops, NULL, NULL,
2914 #ifndef HAVE_ONLY_PROCFS_SEQ
2915                                 NULL,
2916 #endif
2917                                 LUSTRE_LOV_NAME, &lov_device_type);
2918
2919         if (rc) {
2920                 kmem_cache_destroy(lov_oinfo_slab);
2921                 lu_kmem_fini(lov_caches);
2922         }
2923
2924         RETURN(rc);
2925 }
2926
2927 #ifdef __KERNEL__
2928 static void /*__exit*/ lov_exit(void)
2929 {
2930         class_unregister_type(LUSTRE_LOV_NAME);
2931         kmem_cache_destroy(lov_oinfo_slab);
2932         lu_kmem_fini(lov_caches);
2933 }
2934
2935 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2936 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2937 MODULE_LICENSE("GPL");
2938
2939 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
2940 #endif