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