lustre/ofd/ofd_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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 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/ofd/ofd_obd.c
  37  *
  38  * Author: Andreas Dilger <adilger@whamcloud.com>
  39  * Author: Alex Zhuravlev <bzzz@whamcloud.com>
  40  * Author: Mike Pershin <tappro@whamcloud.com>
  41  */
  42
  43 #define DEBUG_SUBSYSTEM S_FILTER
  44
  45 #include <lustre/lustre_idl.h>
  46 #include "ofd_internal.h"
  47 #include <obd_cksum.h>
  48 #include <lustre_quota.h>
  49 #include <lustre_lfsck.h>
  50
  51 static int ofd_export_stats_init(struct ofd_device *ofd,
  52                                  struct obd_export *exp, void *client_nid)
  53 {
  54         struct obd_device       *obd = ofd_obd(ofd);
  55         struct nid_stat         *stats;
  56         int                      num_stats;
  57         int                      rc, newnid = 0;
  58
  59         ENTRY;
  60
  61         LASSERT(obd->obd_uses_nid_stats);
  62
  63         if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid))
  64                 /* Self-export gets no proc entry */
  65                 RETURN(0);
  66
  67         rc = lprocfs_exp_setup(exp, client_nid, &newnid);
  68         if (rc) {
  69                 /* Mask error for already created
  70                  * /proc entries */
  71                 if (rc == -EALREADY)
  72                         rc = 0;
  73                 RETURN(rc);
  74         }
  75
  76         if (newnid == 0)
  77                 RETURN(0);
  78
  79         stats = exp->exp_nid_stats;
  80         LASSERT(stats != NULL);
  81
  82         num_stats = NUM_OBD_STATS + LPROC_OFD_STATS_LAST;
  83
  84         stats->nid_stats = lprocfs_alloc_stats(num_stats,
  85                                                LPROCFS_STATS_FLAG_NOPERCPU);
  86         if (stats->nid_stats == NULL)
  87                 return -ENOMEM;
  88
  89         lprocfs_init_ops_stats(LPROC_OFD_STATS_LAST, stats->nid_stats);
  90         ofd_stats_counter_init(stats->nid_stats);
  91         rc = lprocfs_register_stats(stats->nid_proc, "stats",
  92                                     stats->nid_stats);
  93         if (rc)
  94                 GOTO(clean, rc);
  95
  96         rc = lprocfs_nid_ldlm_stats_init(stats);
  97         if (rc) {
  98                 lprocfs_free_stats(&stats->nid_stats);
  99                 GOTO(clean, rc);
 100         }
 101
 102         RETURN(0);
 103 clean:
 104         return rc;
 105 }
 106
 107 static int ofd_parse_connect_data(const struct lu_env *env,
 108                                   struct obd_export *exp,
 109                                   struct obd_connect_data *data,
 110                                   bool new_connection)
 111 {
 112         struct ofd_device                *ofd = ofd_exp(exp);
 113         struct filter_export_data        *fed = &exp->exp_filter_data;
 114
 115         if (!data)
 116                 RETURN(0);
 117
 118         CDEBUG(D_RPCTRACE, "%s: cli %s/%p ocd_connect_flags: "LPX64
 119                " ocd_version: %x ocd_grant: %d ocd_index: %u"
 120                " ocd_group %u\n",
 121                exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
 122                data->ocd_connect_flags, data->ocd_version,
 123                data->ocd_grant, data->ocd_index, data->ocd_group);
 124
 125         if (fed->fed_group != 0 && fed->fed_group != data->ocd_group) {
 126                 CWARN("!!! This export (nid %s) used object group %d "
 127                       "earlier; now it's trying to use group %d!  This could "
 128                       "be a bug in the MDS. Please report to "
 129                       "http://bugs.whamcloud.com/\n",
 130                       obd_export_nid2str(exp), fed->fed_group,
 131                       data->ocd_group);
 132                 RETURN(-EPROTO);
 133         }
 134         fed->fed_group = data->ocd_group;
 135
 136         data->ocd_connect_flags &= OST_CONNECT_SUPPORTED;
 137         data->ocd_version = LUSTRE_VERSION_CODE;
 138
 139         /* Kindly make sure the SKIP_ORPHAN flag is from MDS. */
 140         if (data->ocd_connect_flags & OBD_CONNECT_MDS)
 141                 CDEBUG(D_HA, "%s: Received MDS connection for group %u\n",
 142                        exp->exp_obd->obd_name, data->ocd_group);
 143         else if (data->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN)
 144                 RETURN(-EPROTO);
 145
 146         if (ofd_grant_param_supp(exp)) {
 147                 exp->exp_filter_data.fed_pagesize = data->ocd_blocksize;
 148                 /* ocd_{blocksize,inodespace} are log2 values */
 149                 data->ocd_blocksize  = ofd->ofd_blockbits;
 150                 data->ocd_inodespace = ofd->ofd_dt_conf.ddp_inodespace;
 151                 /* ocd_grant_extent is in 1K blocks */
 152                 data->ocd_grant_extent = ofd->ofd_dt_conf.ddp_grant_frag >> 10;
 153         }
 154
 155         if (data->ocd_connect_flags & OBD_CONNECT_GRANT)
 156                 data->ocd_grant = ofd_grant_connect(env, exp, data->ocd_grant,
 157                                                     new_connection);
 158
 159         if (data->ocd_connect_flags & OBD_CONNECT_INDEX) {
 160                 struct lr_server_data *lsd = &ofd->ofd_lut.lut_lsd;
 161                 int                    index = lsd->lsd_osd_index;
 162
 163                 if (index != data->ocd_index) {
 164                         LCONSOLE_ERROR_MSG(0x136, "Connection from %s to index"
 165                                            " %u doesn't match actual OST index"
 166                                            " %u in last_rcvd file, bad "
 167                                            "configuration?\n",
 168                                            obd_export_nid2str(exp), index,
 169                                            data->ocd_index);
 170                         RETURN(-EBADF);
 171                 }
 172                 if (!(lsd->lsd_feature_compat & OBD_COMPAT_OST)) {
 173                         /* this will only happen on the first connect */
 174                         lsd->lsd_feature_compat |= OBD_COMPAT_OST;
 175                         /* sync is not needed here as lut_client_add will
 176                          * set exp_need_sync flag */
 177                         tgt_server_data_update(env, &ofd->ofd_lut, 0);
 178                 }
 179         }
 180         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_SIZE)) {
 181                 data->ocd_brw_size = 65536;
 182         } else if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
 183                 data->ocd_brw_size = min(data->ocd_brw_size,
 184                                          (__u32)DT_MAX_BRW_SIZE);
 185                 if (data->ocd_brw_size == 0) {
 186                         CERROR("%s: cli %s/%p ocd_connect_flags: "LPX64
 187                                " ocd_version: %x ocd_grant: %d ocd_index: %u "
 188                                "ocd_brw_size is unexpectedly zero, "
 189                                "network data corruption?"
 190                                "Refusing connection of this client\n",
 191                                exp->exp_obd->obd_name,
 192                                exp->exp_client_uuid.uuid,
 193                                exp, data->ocd_connect_flags, data->ocd_version,
 194                                data->ocd_grant, data->ocd_index);
 195                         RETURN(-EPROTO);
 196                 }
 197         }
 198
 199         if (data->ocd_connect_flags & OBD_CONNECT_CKSUM) {
 200                 __u32 cksum_types = data->ocd_cksum_types;
 201
 202                 /* The client set in ocd_cksum_types the checksum types it
 203                  * supports. We have to mask off the algorithms that we don't
 204                  * support */
 205                 data->ocd_cksum_types &= cksum_types_supported_server();
 206
 207                 if (unlikely(data->ocd_cksum_types == 0)) {
 208                         CERROR("%s: Connect with checksum support but no "
 209                                "ocd_cksum_types is set\n",
 210                                exp->exp_obd->obd_name);
 211                         RETURN(-EPROTO);
 212                 }
 213
 214                 CDEBUG(D_RPCTRACE, "%s: cli %s supports cksum type %x, return "
 215                        "%x\n", exp->exp_obd->obd_name, obd_export_nid2str(exp),
 216                        cksum_types, data->ocd_cksum_types);
 217         } else {
 218                 /* This client does not support OBD_CONNECT_CKSUM
 219                  * fall back to CRC32 */
 220                 CDEBUG(D_RPCTRACE, "%s: cli %s does not support "
 221                        "OBD_CONNECT_CKSUM, CRC32 will be used\n",
 222                        exp->exp_obd->obd_name, obd_export_nid2str(exp));
 223         }
 224
 225         if (data->ocd_connect_flags & OBD_CONNECT_MAXBYTES)
 226                 data->ocd_maxbytes = ofd->ofd_dt_conf.ddp_maxbytes;
 227
 228         if (OCD_HAS_FLAG(data, PINGLESS)) {
 229                 if (ptlrpc_pinger_suppress_pings()) {
 230                         spin_lock(&exp->exp_obd->obd_dev_lock);
 231                         list_del_init(&exp->exp_obd_chain_timed);
 232                         spin_unlock(&exp->exp_obd->obd_dev_lock);
 233                 } else {
 234                         data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
 235                 }
 236         }
 237
 238         RETURN(0);
 239 }
 240
 241 static int ofd_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
 242                              struct obd_device *obd, struct obd_uuid *cluuid,
 243                              struct obd_connect_data *data, void *localdata)
 244 {
 245         struct ofd_device       *ofd;
 246         int                      rc;
 247
 248         ENTRY;
 249
 250         if (exp == NULL || obd == NULL || cluuid == NULL)
 251                 RETURN(-EINVAL);
 252
 253         ofd = ofd_dev(obd->obd_lu_dev);
 254
 255         rc = ofd_parse_connect_data(env, exp, data, false);
 256         if (rc == 0)
 257                 ofd_export_stats_init(ofd, exp, localdata);
 258
 259         RETURN(rc);
 260 }
 261
 262 static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
 263                            struct obd_device *obd, struct obd_uuid *cluuid,
 264                            struct obd_connect_data *data, void *localdata)
 265 {
 266         struct obd_export       *exp;
 267         struct ofd_device       *ofd;
 268         struct lustre_handle     conn = { 0 };
 269         int                      rc;
 270         ENTRY;
 271
 272         if (_exp == NULL || obd == NULL || cluuid == NULL)
 273                 RETURN(-EINVAL);
 274
 275         ofd = ofd_dev(obd->obd_lu_dev);
 276
 277         rc = class_connect(&conn, obd, cluuid);
 278         if (rc)
 279                 RETURN(rc);
 280
 281         exp = class_conn2export(&conn);
 282         LASSERT(exp != NULL);
 283
 284         rc = ofd_parse_connect_data(env, exp, data, true);
 285         if (rc)
 286                 GOTO(out, rc);
 287
 288         if (obd->obd_replayable) {
 289                 struct tg_export_data *ted = &exp->exp_target_data;
 290
 291                 memcpy(ted->ted_lcd->lcd_uuid, cluuid,
 292                        sizeof(ted->ted_lcd->lcd_uuid));
 293                 rc = tgt_client_new(env, exp);
 294                 if (rc != 0)
 295                         GOTO(out, rc);
 296                 ofd_export_stats_init(ofd, exp, localdata);
 297         }
 298
 299         CDEBUG(D_HA, "%s: get connection from MDS %d\n", obd->obd_name,
 300                data ? data->ocd_group : -1);
 301
 302 out:
 303         if (rc != 0) {
 304                 class_disconnect(exp);
 305                 *_exp = NULL;
 306         } else {
 307                 *_exp = exp;
 308         }
 309         RETURN(rc);
 310 }
 311
 312 int ofd_obd_disconnect(struct obd_export *exp)
 313 {
 314         struct ofd_device       *ofd = ofd_dev(exp->exp_obd->obd_lu_dev);
 315         struct lu_env            env;
 316         int                      rc;
 317
 318         ENTRY;
 319
 320         LASSERT(exp);
 321         class_export_get(exp);
 322
 323         if (!(exp->exp_flags & OBD_OPT_FORCE))
 324                 ofd_grant_sanity_check(ofd_obd(ofd), __FUNCTION__);
 325
 326         rc = server_disconnect_export(exp);
 327
 328         ofd_grant_discard(exp);
 329
 330         /* Do not erase record for recoverable client. */
 331         if (exp->exp_obd->obd_replayable &&
 332             (!exp->exp_obd->obd_fail || exp->exp_failed)) {
 333                 rc = lu_env_init(&env, LCT_DT_THREAD);
 334                 if (rc)
 335                         GOTO(out, rc);
 336
 337                 tgt_client_del(&env, exp);
 338                 lu_env_fini(&env);
 339         }
 340 out:
 341         class_export_put(exp);
 342         RETURN(rc);
 343 }
 344
 345 static int ofd_init_export(struct obd_export *exp)
 346 {
 347         int rc;
 348
 349         spin_lock_init(&exp->exp_filter_data.fed_lock);
 350         CFS_INIT_LIST_HEAD(&exp->exp_filter_data.fed_mod_list);
 351         atomic_set(&exp->exp_filter_data.fed_soft_sync_count, 0);
 352         spin_lock(&exp->exp_lock);
 353         exp->exp_connecting = 1;
 354         spin_unlock(&exp->exp_lock);
 355
 356         /* self-export doesn't need client data and ldlm initialization */
 357         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
 358                                      &exp->exp_client_uuid)))
 359                 return 0;
 360
 361         rc = tgt_client_alloc(exp);
 362         if (rc == 0)
 363                 ldlm_init_export(exp);
 364         if (rc)
 365                 CERROR("%s: Can't initialize export: rc %d\n",
 366                        exp->exp_obd->obd_name, rc);
 367         return rc;
 368 }
 369
 370 static int ofd_destroy_export(struct obd_export *exp)
 371 {
 372         struct ofd_device *ofd = ofd_dev(exp->exp_obd->obd_lu_dev);
 373
 374         if (exp->exp_filter_data.fed_pending)
 375                 CERROR("%s: cli %s/%p has %lu pending on destroyed export"
 376                        "\n", exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
 377                        exp, exp->exp_filter_data.fed_pending);
 378
 379         target_destroy_export(exp);
 380
 381         if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
 382                                      &exp->exp_client_uuid)))
 383                 return 0;
 384
 385         ldlm_destroy_export(exp);
 386         tgt_client_free(exp);
 387
 388         ofd_fmd_cleanup(exp);
 389
 390         /*
 391          * discard grants once we're sure no more
 392          * interaction with the client is possible
 393          */
 394         ofd_grant_discard(exp);
 395         ofd_fmd_cleanup(exp);
 396
 397         if (exp_connect_flags(exp) & OBD_CONNECT_GRANT_SHRINK) {
 398                 if (ofd->ofd_tot_granted_clients > 0)
 399                         ofd->ofd_tot_granted_clients --;
 400         }
 401
 402         if (!(exp->exp_flags & OBD_OPT_FORCE))
 403                 ofd_grant_sanity_check(exp->exp_obd, __FUNCTION__);
 404
 405         LASSERT(cfs_list_empty(&exp->exp_filter_data.fed_mod_list));
 406         return 0;
 407 }
 408
 409 int ofd_postrecov(const struct lu_env *env, struct ofd_device *ofd)
 410 {
 411         struct lu_device *ldev = &ofd->ofd_dt_dev.dd_lu_dev;
 412
 413         CDEBUG(D_HA, "%s: recovery is over\n", ofd_obd(ofd)->obd_name);
 414         return ldev->ld_ops->ldo_recovery_complete(env, ldev);
 415 }
 416
 417 int ofd_obd_postrecov(struct obd_device *obd)
 418 {
 419         struct lu_env            env;
 420         struct lu_device        *ldev = obd->obd_lu_dev;
 421         int                      rc;
 422
 423         ENTRY;
 424
 425         rc = lu_env_init(&env, LCT_DT_THREAD);
 426         if (rc)
 427                 RETURN(rc);
 428         ofd_info_init(&env, obd->obd_self_export);
 429
 430         rc = ofd_postrecov(&env, ofd_dev(ldev));
 431
 432         lu_env_fini(&env);
 433         RETURN(rc);
 434 }
 435
 436 /* This is not called from request handler, check ofd_set_info_hdl() instead
 437  * this OBD functions is only used by class_notify_sptlrpc_conf() locally
 438  * by direct obd_set_info_async() call */
 439 static int ofd_set_info_async(const struct lu_env *env, struct obd_export *exp,
 440                               __u32 keylen, void *key, __u32 vallen, void *val,
 441                               struct ptlrpc_request_set *set)
 442 {
 443         int rc = 0;
 444
 445         ENTRY;
 446
 447         if (exp->exp_obd == NULL) {
 448                 CDEBUG(D_IOCTL, "invalid export %p\n", exp);
 449                 RETURN(-EINVAL);
 450         }
 451
 452         if (KEY_IS(KEY_SPTLRPC_CONF)) {
 453                 rc = tgt_adapt_sptlrpc_conf(class_exp2tgt(exp), 0);
 454         } else {
 455                 CERROR("%s: Unsupported key %s\n",
 456                        exp->exp_obd->obd_name, (char*)key);
 457                 rc = -EOPNOTSUPP;
 458         }
 459         RETURN(rc);
 460 }
 461
 462 /* used by nrs_orr_range_fill_physical() in ptlrpc, see LU-3239 */
 463 static int ofd_get_info(const struct lu_env *env, struct obd_export *exp,
 464                         __u32 keylen, void *key, __u32 *vallen, void *val,
 465                         struct lov_stripe_md *lsm)
 466 {
 467         struct ofd_thread_info          *info;
 468         struct ofd_device               *ofd;
 469         struct ll_fiemap_info_key       *fm_key = key;
 470         struct ll_user_fiemap           *fiemap = val;
 471         int                              rc = 0;
 472
 473         ENTRY;
 474
 475         if (exp->exp_obd == NULL) {
 476                 CDEBUG(D_IOCTL, "invalid client export %p\n", exp);
 477                 RETURN(-EINVAL);
 478         }
 479
 480         ofd = ofd_exp(exp);
 481
 482         if (KEY_IS(KEY_FIEMAP)) {
 483                 info = ofd_info_init(env, exp);
 484
 485                 rc = ostid_to_fid(&info->fti_fid, &fm_key->oa.o_oi,
 486                                   ofd->ofd_lut.lut_lsd.lsd_osd_index);
 487                 if (rc != 0)
 488                         RETURN(rc);
 489
 490                 rc = ofd_fiemap_get(env, ofd, &info->fti_fid, fiemap);
 491         } else {
 492                 CERROR("%s: not supported key %s\n", ofd_name(ofd), (char*)key);
 493                 rc = -EOPNOTSUPP;
 494         }
 495
 496         RETURN(rc);
 497 }
 498
 499 /** helper function for statfs, also used by grant code */
 500 int ofd_statfs_internal(const struct lu_env *env, struct ofd_device *ofd,
 501                         struct obd_statfs *osfs, __u64 max_age, int *from_cache)
 502 {
 503         int rc = 0;
 504         ENTRY;
 505
 506         down_read(&ofd->ofd_lastid_rwsem);
 507         /* Currently, for safe, we do not distinguish which LAST_ID is broken,
 508          * we may do that in the future.
 509          * Return -ENOSPC until the LAST_ID rebuilt. */
 510         if (unlikely(ofd->ofd_lastid_rebuilding))
 511                 GOTO(out, rc = -ENOSPC);
 512
 513         spin_lock(&ofd->ofd_osfs_lock);
 514         if (cfs_time_before_64(ofd->ofd_osfs_age, max_age) || max_age == 0) {
 515                 obd_size unstable;
 516
 517                 /* statfs data are too old, get up-to-date one.
 518                  * we must be cautious here since multiple threads might be
 519                  * willing to update statfs data concurrently and we must
 520                  * grant that cached statfs data are always consistent */
 521
 522                 if (ofd->ofd_statfs_inflight == 0)
 523                         /* clear inflight counter if no users, although it would
 524                          * take a while to overflow this 64-bit counter ... */
 525                         ofd->ofd_osfs_inflight = 0;
 526                 /* notify ofd_grant_commit() that we want to track writes
 527                  * completed as of now */
 528                 ofd->ofd_statfs_inflight++;
 529                 /* record value of inflight counter before running statfs to
 530                  * compute the diff once statfs is completed */
 531                 unstable = ofd->ofd_osfs_inflight;
 532                 spin_unlock(&ofd->ofd_osfs_lock);
 533
 534                 /* statfs can sleep ... hopefully not for too long since we can
 535                  * call it fairly often as space fills up */
 536                 rc = dt_statfs(env, ofd->ofd_osd, osfs);
 537                 if (unlikely(rc))
 538                         GOTO(out, rc);
 539
 540                 spin_lock(&ofd->ofd_grant_lock);
 541                 spin_lock(&ofd->ofd_osfs_lock);
 542                 /* calculate how much space was written while we released the
 543                  * ofd_osfs_lock */
 544                 unstable = ofd->ofd_osfs_inflight - unstable;
 545                 ofd->ofd_osfs_unstable = 0;
 546                 if (unstable) {
 547                         /* some writes completed while we were running statfs
 548                          * w/o the ofd_osfs_lock. Those ones got added to
 549                          * the cached statfs data that we are about to crunch.
 550                          * Take them into account in the new statfs data */
 551                         osfs->os_bavail -= min_t(obd_size, osfs->os_bavail,
 552                                                unstable >> ofd->ofd_blockbits);
 553                         /* However, we don't really know if those writes got
 554                          * accounted in the statfs call, so tell
 555                          * ofd_grant_space_left() there is some uncertainty
 556                          * on the accounting of those writes.
 557                          * The purpose is to prevent spurious error messages in
 558                          * ofd_grant_space_left() since those writes might be
 559                          * accounted twice. */
 560                         ofd->ofd_osfs_unstable += unstable;
 561                 }
 562                 /* similarly, there is some uncertainty on write requests
 563                  * between prepare & commit */
 564                 ofd->ofd_osfs_unstable += ofd->ofd_tot_pending;
 565                 spin_unlock(&ofd->ofd_grant_lock);
 566
 567                 /* finally udpate cached statfs data */
 568                 ofd->ofd_osfs = *osfs;
 569                 ofd->ofd_osfs_age = cfs_time_current_64();
 570
 571                 ofd->ofd_statfs_inflight--; /* stop tracking */
 572                 if (ofd->ofd_statfs_inflight == 0)
 573                         ofd->ofd_osfs_inflight = 0;
 574                 spin_unlock(&ofd->ofd_osfs_lock);
 575
 576                 if (from_cache)
 577                         *from_cache = 0;
 578         } else {
 579                 /* use cached statfs data */
 580                 *osfs = ofd->ofd_osfs;
 581                 spin_unlock(&ofd->ofd_osfs_lock);
 582                 if (from_cache)
 583                         *from_cache = 1;
 584         }
 585
 586         GOTO(out, rc);
 587
 588 out:
 589         up_read(&ofd->ofd_lastid_rwsem);
 590
 591         return rc;
 592 }
 593
 594 int ofd_statfs(const struct lu_env *env,  struct obd_export *exp,
 595                struct obd_statfs *osfs, __u64 max_age, __u32 flags)
 596 {
 597         struct obd_device       *obd = class_exp2obd(exp);
 598         struct ofd_device       *ofd = ofd_dev(exp->exp_obd->obd_lu_dev);
 599         int                      rc;
 600
 601         ENTRY;
 602
 603         rc = ofd_statfs_internal(env, ofd, osfs, max_age, NULL);
 604         if (unlikely(rc))
 605                 GOTO(out, rc);
 606
 607         /* at least try to account for cached pages.  its still racy and
 608          * might be under-reporting if clients haven't announced their
 609          * caches with brw recently */
 610
 611         CDEBUG(D_SUPER | D_CACHE, "blocks cached "LPU64" granted "LPU64
 612                " pending "LPU64" free "LPU64" avail "LPU64"\n",
 613                ofd->ofd_tot_dirty, ofd->ofd_tot_granted, ofd->ofd_tot_pending,
 614                osfs->os_bfree << ofd->ofd_blockbits,
 615                osfs->os_bavail << ofd->ofd_blockbits);
 616
 617         osfs->os_bavail -= min_t(obd_size, osfs->os_bavail,
 618                                  ((ofd->ofd_tot_dirty + ofd->ofd_tot_pending +
 619                                    osfs->os_bsize - 1) >> ofd->ofd_blockbits));
 620
 621         /* The QoS code on the MDS does not care about space reserved for
 622          * precreate, so take it out. */
 623         if (exp_connect_flags(exp) & OBD_CONNECT_MDS) {
 624                 struct filter_export_data *fed;
 625
 626                 fed = &obd->obd_self_export->exp_filter_data;
 627                 osfs->os_bavail -= min_t(obd_size, osfs->os_bavail,
 628                                          fed->fed_grant >> ofd->ofd_blockbits);
 629         }
 630
 631         ofd_grant_sanity_check(obd, __FUNCTION__);
 632         CDEBUG(D_CACHE, LPU64" blocks: "LPU64" free, "LPU64" avail; "
 633                LPU64" objects: "LPU64" free; state %x\n",
 634                osfs->os_blocks, osfs->os_bfree, osfs->os_bavail,
 635                osfs->os_files, osfs->os_ffree, osfs->os_state);
 636
 637         if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOINO,
 638                                  ofd->ofd_lut.lut_lsd.lsd_osd_index))
 639                 osfs->os_ffree = 0;
 640
 641         /* OS_STATE_READONLY can be set by OSD already */
 642         if (ofd->ofd_raid_degraded)
 643                 osfs->os_state |= OS_STATE_DEGRADED;
 644
 645         if (obd->obd_self_export != exp && ofd_grant_compat(exp, ofd)) {
 646                 /* clients which don't support OBD_CONNECT_GRANT_PARAM
 647                  * should not see a block size > page size, otherwise
 648                  * cl_lost_grant goes mad. Therefore, we emulate a 4KB (=2^12)
 649                  * block size which is the biggest block size known to work
 650                  * with all client's page size. */
 651                 osfs->os_blocks <<= ofd->ofd_blockbits - COMPAT_BSIZE_SHIFT;
 652                 osfs->os_bfree  <<= ofd->ofd_blockbits - COMPAT_BSIZE_SHIFT;
 653                 osfs->os_bavail <<= ofd->ofd_blockbits - COMPAT_BSIZE_SHIFT;
 654                 osfs->os_bsize    = 1 << COMPAT_BSIZE_SHIFT;
 655         }
 656
 657         if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOSPC,
 658                                  ofd->ofd_lut.lut_lsd.lsd_osd_index))
 659                 osfs->os_bfree = osfs->os_bavail = 2;
 660
 661         EXIT;
 662 out:
 663         return rc;
 664 }
 665
 666 /* needed by echo client only for now, RPC handler uses ofd_setattr_hdl() */
 667 int ofd_echo_setattr(const struct lu_env *env, struct obd_export *exp,
 668                      struct obd_info *oinfo, struct obd_trans_info *oti)
 669 {
 670         struct ofd_thread_info  *info;
 671         struct ofd_device       *ofd = ofd_exp(exp);
 672         struct ldlm_namespace   *ns = ofd->ofd_namespace;
 673         struct ldlm_resource    *res;
 674         struct ofd_object       *fo;
 675         struct obdo             *oa = oinfo->oi_oa;
 676         struct lu_fid           *fid = &oa->o_oi.oi_fid;
 677         struct filter_fid       *ff = NULL;
 678         int                      rc = 0;
 679
 680         ENTRY;
 681
 682         info = ofd_info_init(env, exp);
 683
 684         ost_fid_build_resid(fid, &info->fti_resid);
 685
 686         /* This would be very bad - accidentally truncating a file when
 687          * changing the time or similar - bug 12203. */
 688         if (oa->o_valid & OBD_MD_FLSIZE &&
 689             oinfo->oi_policy.l_extent.end != OBD_OBJECT_EOF) {
 690                 static char mdsinum[48];
 691
 692                 if (oa->o_valid & OBD_MD_FLFID)
 693                         snprintf(mdsinum, sizeof(mdsinum) - 1,
 694                                  "of parent "DFID, oa->o_parent_seq,
 695                                  oa->o_parent_oid, 0);
 696                 else
 697                         mdsinum[0] = '\0';
 698
 699                 CERROR("%s: setattr from %s trying to truncate object "DFID
 700                        " %s\n", ofd_name(ofd), obd_export_nid2str(exp),
 701                        PFID(fid), mdsinum);
 702                 GOTO(out, rc = -EPERM);
 703         }
 704
 705         fo = ofd_object_find_exists(env, ofd, fid);
 706         if (IS_ERR(fo)) {
 707                 CERROR("%s: can't find object "DFID"\n",
 708                        ofd_name(ofd), PFID(fid));
 709                 GOTO(out, rc = PTR_ERR(fo));
 710         }
 711
 712         la_from_obdo(&info->fti_attr, oa, oa->o_valid);
 713         info->fti_attr.la_valid &= ~LA_TYPE;
 714
 715         if (oa->o_valid & OBD_MD_FLFID) {
 716                 ff = &info->fti_mds_fid;
 717                 ofd_prepare_fidea(ff, oa);
 718         }
 719
 720         /* setting objects attributes (including owner/group) */
 721         rc = ofd_attr_set(env, fo, &info->fti_attr, ff);
 722         if (rc)
 723                 GOTO(out_unlock, rc);
 724
 725         ofd_counter_incr(exp, LPROC_OFD_STATS_SETATTR, NULL, 1);
 726         EXIT;
 727 out_unlock:
 728         ofd_object_put(env, fo);
 729 out:
 730         if (rc == 0) {
 731                 /* we do not call this before to avoid lu_object_find() in
 732                  *  ->lvbo_update() holding another reference on the object.
 733                  * otherwise concurrent destroy can make the object unavailable
 734                  * for 2nd lu_object_find() waiting for the first reference
 735                  * to go... deadlock! */
 736                 res = ldlm_resource_get(ns, NULL, &info->fti_resid, LDLM_EXTENT, 0);
 737                 if (res != NULL) {
 738                         ldlm_res_lvbo_update(res, NULL, 0);
 739                         ldlm_resource_putref(res);
 740                 }
 741         }
 742
 743         return rc;
 744 }
 745
 746 int ofd_destroy_by_fid(const struct lu_env *env, struct ofd_device *ofd,
 747                        const struct lu_fid *fid, int orphan)
 748 {
 749         struct ofd_thread_info  *info = ofd_info(env);
 750         struct lustre_handle     lockh;
 751         __u64                    flags = LDLM_FL_AST_DISCARD_DATA;
 752         __u64                    rc = 0;
 753         ldlm_policy_data_t       policy = {
 754                                         .l_extent = { 0, OBD_OBJECT_EOF }
 755                                  };
 756         struct ofd_object       *fo;
 757
 758         ENTRY;
 759
 760         fo = ofd_object_find_exists(env, ofd, fid);
 761         if (IS_ERR(fo))
 762                 RETURN(PTR_ERR(fo));
 763
 764         /* Tell the clients that the object is gone now and that they should
 765          * throw away any cached pages. */
 766         ost_fid_build_resid(fid, &info->fti_resid);
 767         rc = ldlm_cli_enqueue_local(ofd->ofd_namespace, &info->fti_resid,
 768                                     LDLM_EXTENT, &policy, LCK_PW, &flags,
 769                                     ldlm_blocking_ast, ldlm_completion_ast,
 770                                     NULL, NULL, 0, LVB_T_NONE, NULL, &lockh);
 771
 772         /* We only care about the side-effects, just drop the lock. */
 773         if (rc == ELDLM_OK)
 774                 ldlm_lock_decref(&lockh, LCK_PW);
 775
 776         LASSERT(fo != NULL);
 777
 778         rc = ofd_object_destroy(env, fo, orphan);
 779         EXIT;
 780
 781         ofd_object_put(env, fo);
 782         RETURN(rc);
 783 }
 784
 785 /* needed by echo client only for now, RPC handler uses ofd_destroy_hdl() */
 786 int ofd_echo_destroy(const struct lu_env *env, struct obd_export *exp,
 787                      struct obdo *oa, struct lov_stripe_md *md,
 788                      struct obd_trans_info *oti, struct obd_export *md_exp,
 789                      void *capa)
 790 {
 791         struct ofd_device       *ofd = ofd_exp(exp);
 792         struct lu_fid           *fid = &oa->o_oi.oi_fid;
 793         int                      rc = 0;
 794
 795         ENTRY;
 796
 797         ofd_info_init(env, exp);
 798
 799         CDEBUG(D_HA, "%s: Destroy object "DFID"\n", ofd_name(ofd), PFID(fid));
 800
 801         rc = ofd_destroy_by_fid(env, ofd, fid, 0);
 802         if (rc == -ENOENT) {
 803                 CDEBUG(D_INODE, "%s: destroying non-existent object "DFID"\n",
 804                        ofd_name(ofd), PFID(fid));
 805                 GOTO(out, rc);
 806         } else if (rc != 0) {
 807                 CERROR("%s: error destroying object "DFID": %d\n",
 808                        ofd_name(ofd), PFID(fid), rc);
 809                 GOTO(out, rc);
 810         }
 811         EXIT;
 812 out:
 813         return rc;
 814 }
 815
 816 /* needed by echo client only for now, RPC handler uses ofd_create_hdl()
 817  * It is much simpler and just create objects */
 818 int ofd_echo_create(const struct lu_env *env, struct obd_export *exp,
 819                     struct obdo *oa, struct lov_stripe_md **ea,
 820                     struct obd_trans_info *oti)
 821 {
 822         struct ofd_device       *ofd = ofd_exp(exp);
 823         struct ofd_thread_info  *info;
 824         obd_seq                  seq = ostid_seq(&oa->o_oi);
 825         struct ofd_seq          *oseq;
 826         int                      rc = 0, diff = 1;
 827         obd_id                   next_id;
 828         int                      count;
 829
 830         ENTRY;
 831
 832         info = ofd_info_init(env, exp);
 833
 834         LASSERT(seq == FID_SEQ_ECHO);
 835         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
 836
 837         CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi));
 838
 839         down_read(&ofd->ofd_lastid_rwsem);
 840         /* Currently, for safe, we do not distinguish which LAST_ID is broken,
 841          * we may do that in the future.
 842          * Return -ENOSPC until the LAST_ID rebuilt. */
 843         if (unlikely(ofd->ofd_lastid_rebuilding))
 844                 GOTO(out_sem, rc = -ENOSPC);
 845
 846         oseq = ofd_seq_load(env, ofd, seq);
 847         if (IS_ERR(oseq)) {
 848                 CERROR("%s: Can't find FID Sequence "LPX64": rc = %ld\n",
 849                        ofd_name(ofd), seq, PTR_ERR(oseq));
 850                 GOTO(out_sem, rc = -EINVAL);
 851         }
 852
 853         mutex_lock(&oseq->os_create_lock);
 854         rc = ofd_grant_create(env, ofd_obd(ofd)->obd_self_export, &diff);
 855         if (rc < 0) {
 856                 CDEBUG(D_HA, "%s: failed to acquire grant space for "
 857                        "precreate (%d): rc = %d\n", ofd_name(ofd), diff, rc);
 858                 diff = 0;
 859                 GOTO(out, rc);
 860         }
 861
 862         next_id = ofd_seq_last_oid(oseq) + 1;
 863         count = ofd_precreate_batch(ofd, diff);
 864
 865         rc = ofd_precreate_objects(env, ofd, next_id, oseq, count, 0);
 866         if (rc < 0) {
 867                 CERROR("%s: unable to precreate: rc = %d\n",
 868                        ofd_name(ofd), rc);
 869         } else {
 870                 ostid_set_id(&oa->o_oi, ofd_seq_last_oid(oseq));
 871                 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
 872                 rc = 0;
 873         }
 874
 875         ofd_grant_commit(env, ofd_obd(ofd)->obd_self_export, rc);
 876 out:
 877         mutex_unlock(&oseq->os_create_lock);
 878         if (rc == 0 && ea != NULL) {
 879                 struct lov_stripe_md *lsm = *ea;
 880
 881                 lsm->lsm_oi = oa->o_oi;
 882         }
 883         ofd_seq_put(env, oseq);
 884
 885 out_sem:
 886         up_read(&ofd->ofd_lastid_rwsem);
 887         RETURN(rc);
 888 }
 889
 890 /* needed by echo client only for now, RPC handler uses ofd_getattr_hdl() */
 891 int ofd_echo_getattr(const struct lu_env *env, struct obd_export *exp,
 892                      struct obd_info *oinfo)
 893 {
 894         struct ofd_device       *ofd = ofd_exp(exp);
 895         struct ofd_thread_info  *info;
 896         struct lu_fid           *fid = &oinfo->oi_oa->o_oi.oi_fid;
 897         struct ofd_object       *fo;
 898         int                      rc = 0;
 899
 900         ENTRY;
 901
 902         info = ofd_info_init(env, exp);
 903
 904         fo = ofd_object_find_exists(env, ofd, fid);
 905         if (IS_ERR(fo))
 906                 GOTO(out, rc = PTR_ERR(fo));
 907
 908         LASSERT(fo != NULL);
 909         rc = ofd_attr_get(env, fo, &info->fti_attr);
 910         oinfo->oi_oa->o_valid = OBD_MD_FLID;
 911         if (rc == 0) {
 912                 __u64 curr_version;
 913
 914                 obdo_from_la(oinfo->oi_oa, &info->fti_attr,
 915                              OFD_VALID_FLAGS | LA_UID | LA_GID);
 916
 917                 /* Store object version in reply */
 918                 curr_version = dt_version_get(env, ofd_object_child(fo));
 919                 if ((__s64)curr_version != -EOPNOTSUPP) {
 920                         oinfo->oi_oa->o_valid |= OBD_MD_FLDATAVERSION;
 921                         oinfo->oi_oa->o_data_version = curr_version;
 922                 }
 923         }
 924
 925         ofd_object_put(env, fo);
 926 out:
 927         RETURN(rc);
 928 }
 929
 930 static int ofd_ioc_get_obj_version(const struct lu_env *env,
 931                                    struct ofd_device *ofd, void *karg)
 932 {
 933         struct obd_ioctl_data *data = karg;
 934         struct lu_fid          fid;
 935         struct ofd_object     *fo;
 936         dt_obj_version_t       version;
 937         int                    rc = 0;
 938
 939         ENTRY;
 940
 941         if (data->ioc_inlbuf2 == NULL || data->ioc_inllen2 != sizeof(version))
 942                 GOTO(out, rc = -EINVAL);
 943
 944         if (data->ioc_inlbuf1 != NULL && data->ioc_inllen1 == sizeof(fid)) {
 945                 fid = *(struct lu_fid *)data->ioc_inlbuf1;
 946         } else if (data->ioc_inlbuf3 != NULL &&
 947                    data->ioc_inllen3 == sizeof(__u64) &&
 948                    data->ioc_inlbuf4 != NULL &&
 949                    data->ioc_inllen4 == sizeof(__u64)) {
 950                 struct ost_id ostid;
 951
 952                 ostid_set_seq(&ostid, *(__u64 *)data->ioc_inlbuf4);
 953                 ostid_set_id(&ostid, *(__u64 *)data->ioc_inlbuf3);
 954                 rc = ostid_to_fid(&fid, &ostid,
 955                                   ofd->ofd_lut.lut_lsd.lsd_osd_index);
 956                 if (rc != 0)
 957                         GOTO(out, rc);
 958         } else {
 959                 GOTO(out, rc = -EINVAL);
 960         }
 961
 962         if (!fid_is_sane(&fid))
 963                 GOTO(out, rc = -EINVAL);
 964
 965         fo = ofd_object_find(env, ofd, &fid);
 966         if (IS_ERR(fo))
 967                 GOTO(out, rc = PTR_ERR(fo));
 968
 969         if (!ofd_object_exists(fo))
 970                 GOTO(out_fo, rc = -ENOENT);
 971
 972         if (lu_object_remote(&fo->ofo_obj.do_lu))
 973                 GOTO(out_fo, rc = -EREMOTE);
 974
 975         version = dt_version_get(env, ofd_object_child(fo));
 976         if (version == 0)
 977                 GOTO(out_fo, rc = -EIO);
 978
 979         *(dt_obj_version_t *)data->ioc_inlbuf2 = version;
 980
 981         EXIT;
 982 out_fo:
 983         ofd_object_put(env, fo);
 984 out:
 985         return rc;
 986 }
 987
 988 int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 989                   void *karg, void *uarg)
 990 {
 991         struct lu_env            env;
 992         struct ofd_device       *ofd = ofd_exp(exp);
 993         struct obd_device       *obd = ofd_obd(ofd);
 994         int                      rc;
 995
 996         ENTRY;
 997
 998         CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
 999         rc = lu_env_init(&env, LCT_DT_THREAD);
1000         if (rc)
1001                 RETURN(rc);
1002
1003         switch (cmd) {
1004         case OBD_IOC_ABORT_RECOVERY:
1005                 CERROR("%s: aborting recovery\n", obd->obd_name);
1006                 target_stop_recovery_thread(obd);
1007                 break;
1008         case OBD_IOC_SYNC:
1009                 CDEBUG(D_RPCTRACE, "syncing ost %s\n", obd->obd_name);
1010                 rc = dt_sync(&env, ofd->ofd_osd);
1011                 break;
1012         case OBD_IOC_SET_READONLY:
1013                 rc = dt_sync(&env, ofd->ofd_osd);
1014                 if (rc == 0)
1015                         rc = dt_ro(&env, ofd->ofd_osd);
1016                 break;
1017         case OBD_IOC_START_LFSCK: {
1018                 struct obd_ioctl_data *data = karg;
1019                 struct lfsck_start_param lsp;
1020
1021                 if (unlikely(data == NULL)) {
1022                         rc = -EINVAL;
1023                         break;
1024                 }
1025
1026                 lsp.lsp_start = (struct lfsck_start *)(data->ioc_inlbuf1);
1027                 lsp.lsp_index_valid = 0;
1028                 rc = lfsck_start(&env, ofd->ofd_osd, &lsp);
1029                 break;
1030         }
1031         case OBD_IOC_STOP_LFSCK: {
1032                 struct obd_ioctl_data *data = karg;
1033                 struct lfsck_stop      stop;
1034
1035                 stop.ls_status = LS_STOPPED;
1036                 /* Old lfsck utils may pass NULL @stop. */
1037                 if (data->ioc_inlbuf1 == NULL)
1038                         stop.ls_flags = 0;
1039                 else
1040                         stop.ls_flags =
1041                         ((struct lfsck_stop *)(data->ioc_inlbuf1))->ls_flags;
1042
1043                 rc = lfsck_stop(&env, ofd->ofd_osd, &stop);
1044                 break;
1045         }
1046         case OBD_IOC_GET_OBJ_VERSION:
1047                 rc = ofd_ioc_get_obj_version(&env, ofd, karg);
1048                 break;
1049         default:
1050                 CERROR("%s: not supported cmd = %d\n", obd->obd_name, cmd);
1051                 rc = -ENOTTY;
1052         }
1053
1054         lu_env_fini(&env);
1055         RETURN(rc);
1056 }
1057
1058 static int ofd_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
1059 {
1060         int rc = 0;
1061
1062         ENTRY;
1063
1064         switch(stage) {
1065         case OBD_CLEANUP_EARLY:
1066                 break;
1067         case OBD_CLEANUP_EXPORTS:
1068                 target_cleanup_recovery(obd);
1069                 break;
1070         }
1071         RETURN(rc);
1072 }
1073
1074 static int ofd_ping(const struct lu_env *env, struct obd_export *exp)
1075 {
1076         ofd_fmd_expire(exp);
1077         return 0;
1078 }
1079
1080 static int ofd_health_check(const struct lu_env *nul, struct obd_device *obd)
1081 {
1082         struct ofd_device       *ofd = ofd_dev(obd->obd_lu_dev);
1083         struct ofd_thread_info  *info;
1084         struct lu_env            env;
1085 #ifdef USE_HEALTH_CHECK_WRITE
1086         struct thandle          *th;
1087 #endif
1088         int                      rc = 0;
1089
1090         /* obd_proc_read_health pass NULL env, we need real one */
1091         rc = lu_env_init(&env, LCT_DT_THREAD);
1092         if (rc)
1093                 RETURN(rc);
1094
1095         info = ofd_info_init(&env, NULL);
1096         rc = dt_statfs(&env, ofd->ofd_osd, &info->fti_u.osfs);
1097         if (unlikely(rc))
1098                 GOTO(out, rc);
1099
1100         if (info->fti_u.osfs.os_state == OS_STATE_READONLY)
1101                 GOTO(out, rc = -EROFS);
1102
1103 #ifdef USE_HEALTH_CHECK_WRITE
1104         OBD_ALLOC(info->fti_buf.lb_buf, PAGE_CACHE_SIZE);
1105         if (info->fti_buf.lb_buf == NULL)
1106                 GOTO(out, rc = -ENOMEM);
1107
1108         info->fti_buf.lb_len = PAGE_CACHE_SIZE;
1109         info->fti_off = 0;
1110
1111         th = dt_trans_create(&env, ofd->ofd_osd);
1112         if (IS_ERR(th))
1113                 GOTO(out, rc = PTR_ERR(th));
1114
1115         rc = dt_declare_record_write(&env, ofd->ofd_health_check_file,
1116                                      info->fti_buf.lb_len, info->fti_off, th);
1117         if (rc == 0) {
1118                 th->th_sync = 1; /* sync IO is needed */
1119                 rc = dt_trans_start_local(&env, ofd->ofd_osd, th);
1120                 if (rc == 0)
1121                         rc = dt_record_write(&env, ofd->ofd_health_check_file,
1122                                              &info->fti_buf, &info->fti_off,
1123                                              th);
1124         }
1125         dt_trans_stop(&env, ofd->ofd_osd, th);
1126
1127         OBD_FREE(info->fti_buf.lb_buf, PAGE_CACHE_SIZE);
1128
1129         CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n",rc);
1130 #endif
1131 out:
1132         lu_env_fini(&env);
1133         return !!rc;
1134 }
1135
1136 /*
1137  * Handle quota control requests to consult current usage/limit.
1138  *
1139  * \param obd - is the obd device associated with the ofd
1140  * \param exp - is the client's export
1141  * \param oqctl - is the obd_quotactl request to be processed
1142  */
1143 static int ofd_quotactl(struct obd_device *obd, struct obd_export *exp,
1144                         struct obd_quotactl *oqctl)
1145 {
1146         struct ofd_device  *ofd = ofd_dev(obd->obd_lu_dev);
1147         struct lu_env       env;
1148         int                 rc;
1149         ENTRY;
1150
1151         /* report success for quota on/off for interoperability with current MDT
1152          * stack */
1153         if (oqctl->qc_cmd == Q_QUOTAON || oqctl->qc_cmd == Q_QUOTAOFF)
1154                 RETURN(0);
1155
1156         rc = lu_env_init(&env, LCT_DT_THREAD);
1157         if (rc)
1158                 RETURN(rc);
1159
1160         rc = lquotactl_slv(&env, ofd->ofd_osd, oqctl);
1161         lu_env_fini(&env);
1162
1163         RETURN(rc);
1164 }
1165
1166 struct obd_ops ofd_obd_ops = {
1167         .o_owner                = THIS_MODULE,
1168         .o_connect              = ofd_obd_connect,
1169         .o_reconnect            = ofd_obd_reconnect,
1170         .o_disconnect           = ofd_obd_disconnect,
1171         .o_create               = ofd_echo_create,
1172         .o_setattr              = ofd_echo_setattr,
1173         .o_preprw               = ofd_preprw,
1174         .o_commitrw             = ofd_commitrw,
1175         .o_destroy              = ofd_echo_destroy,
1176         .o_init_export          = ofd_init_export,
1177         .o_destroy_export       = ofd_destroy_export,
1178         .o_postrecov            = ofd_obd_postrecov,
1179         .o_getattr              = ofd_echo_getattr,
1180         .o_iocontrol            = ofd_iocontrol,
1181         .o_precleanup           = ofd_precleanup,
1182         .o_ping                 = ofd_ping,
1183         .o_health_check         = ofd_health_check,
1184         .o_quotactl             = ofd_quotactl,
1185         .o_set_info_async       = ofd_set_info_async,
1186         .o_get_info             = ofd_get_info,
1187 };