lustre/mdd/mdd_lfsck.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,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License version 2 for more details.  A copy is
  14  * included in the COPYING file that accompanied this code.
  15
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2012, Intel Corporation.
  24  */
  25 /*
  26  * lustre/mdd/mdd_lfsck.c
  27  *
  28  * Top-level entry points into mdd module
  29  *
  30  * LFSCK controller, which scans the whole device through low layer
  31  * iteration APIs, drives all lfsck compeonents, controls the speed.
  32  *
  33  * Author: Fan Yong <yong.fan@whamcloud.com>
  34  */
  35
  36 #ifndef EXPORT_SYMTAB
  37 # define EXPORT_SYMTAB
  38 #endif
  39 #define DEBUG_SUBSYSTEM S_MDS
  40
  41 #include <lustre/lustre_idl.h>
  42 #include <lustre_fid.h>
  43 #include <obd_support.h>
  44
  45 #include "mdd_internal.h"
  46 #include "mdd_lfsck.h"
  47
  48 #define HALF_SEC                        (CFS_HZ >> 1)
  49 #define LFSCK_CHECKPOINT_INTERVAL       60
  50
  51 const char lfsck_bookmark_name[] = "lfsck_bookmark";
  52
  53 /* misc functions */
  54
  55 static inline struct mdd_device *mdd_lfsck2mdd(struct md_lfsck *lfsck)
  56 {
  57         return container_of0(lfsck, struct mdd_device, mdd_lfsck);
  58 }
  59
  60 static inline char *mdd_lfsck2name(struct md_lfsck *lfsck)
  61 {
  62         struct mdd_device *mdd = mdd_lfsck2mdd(lfsck);
  63
  64         return mdd2obd_dev(mdd)->obd_name;
  65 }
  66
  67 static inline void mdd_lfsck_component_put(const struct lu_env *env,
  68                                            struct lfsck_component *com)
  69 {
  70         if (atomic_dec_and_test(&com->lc_ref)) {
  71                 if (com->lc_obj != NULL)
  72                         lu_object_put(env, &com->lc_obj->do_lu);
  73                 if (com->lc_file_ram != NULL)
  74                         OBD_FREE(com->lc_file_ram, com->lc_file_size);
  75                 if (com->lc_file_disk != NULL)
  76                         OBD_FREE(com->lc_file_disk, com->lc_file_size);
  77                 OBD_FREE_PTR(com);
  78         }
  79 }
  80
  81 static inline struct lfsck_component *
  82 __mdd_lfsck_component_find(struct md_lfsck *lfsck, __u16 type, cfs_list_t *list)
  83 {
  84         struct lfsck_component *com;
  85
  86         cfs_list_for_each_entry(com, list, lc_link) {
  87                 if (com->lc_type == type)
  88                         return com;
  89         }
  90         return NULL;
  91 }
  92
  93 static void mdd_lfsck_component_cleanup(const struct lu_env *env,
  94                                         struct lfsck_component *com)
  95 {
  96         if (!cfs_list_empty(&com->lc_link))
  97                 cfs_list_del_init(&com->lc_link);
  98         if (!cfs_list_empty(&com->lc_link_dir))
  99                 cfs_list_del_init(&com->lc_link_dir);
 100
 101         mdd_lfsck_component_put(env, com);
 102 }
 103
 104 static void __mdd_lfsck_set_speed(struct md_lfsck *lfsck, __u32 limit)
 105 {
 106         lfsck->ml_bookmark_ram.lb_speed_limit = limit;
 107         if (limit != LFSCK_SPEED_NO_LIMIT) {
 108                 if (limit > CFS_HZ) {
 109                         lfsck->ml_sleep_rate = limit / CFS_HZ;
 110                         lfsck->ml_sleep_jif = 1;
 111                 } else {
 112                         lfsck->ml_sleep_rate = 1;
 113                         lfsck->ml_sleep_jif = CFS_HZ / limit;
 114                 }
 115         } else {
 116                 lfsck->ml_sleep_jif = 0;
 117                 lfsck->ml_sleep_rate = 0;
 118         }
 119 }
 120
 121 static void mdd_lfsck_control_speed(struct md_lfsck *lfsck)
 122 {
 123         struct ptlrpc_thread *thread = &lfsck->ml_thread;
 124         struct l_wait_info    lwi;
 125
 126         if (lfsck->ml_sleep_jif > 0 &&
 127             lfsck->ml_new_scanned >= lfsck->ml_sleep_rate) {
 128                 spin_lock(&lfsck->ml_lock);
 129                 if (likely(lfsck->ml_sleep_jif > 0 &&
 130                            lfsck->ml_new_scanned >= lfsck->ml_sleep_rate)) {
 131                         lwi = LWI_TIMEOUT_INTR(lfsck->ml_sleep_jif, NULL,
 132                                                LWI_ON_SIGNAL_NOOP, NULL);
 133                         spin_unlock(&lfsck->ml_lock);
 134
 135                         l_wait_event(thread->t_ctl_waitq,
 136                                      !thread_is_running(thread),
 137                                      &lwi);
 138                         lfsck->ml_new_scanned = 0;
 139                 } else {
 140                         spin_unlock(&lfsck->ml_lock);
 141                 }
 142         }
 143 }
 144
 145 /* lfsck_bookmark file ops */
 146
 147 static void inline mdd_lfsck_bookmark_to_cpu(struct lfsck_bookmark *des,
 148                                              struct lfsck_bookmark *src)
 149 {
 150         des->lb_magic = le32_to_cpu(src->lb_magic);
 151         des->lb_version = le16_to_cpu(src->lb_version);
 152         des->lb_param = le16_to_cpu(src->lb_param);
 153         des->lb_speed_limit = le32_to_cpu(src->lb_speed_limit);
 154 }
 155
 156 static void inline mdd_lfsck_bookmark_to_le(struct lfsck_bookmark *des,
 157                                             struct lfsck_bookmark *src)
 158 {
 159         des->lb_magic = cpu_to_le32(src->lb_magic);
 160         des->lb_version = cpu_to_le16(src->lb_version);
 161         des->lb_param = cpu_to_le16(src->lb_param);
 162         des->lb_speed_limit = cpu_to_le32(src->lb_speed_limit);
 163 }
 164
 165 static int mdd_lfsck_bookmark_load(const struct lu_env *env,
 166                                    struct md_lfsck *lfsck)
 167 {
 168         loff_t pos = 0;
 169         int    len = sizeof(struct lfsck_bookmark);
 170         int    rc;
 171
 172         rc = dt_record_read(env, lfsck->ml_bookmark_obj,
 173                             mdd_buf_get(env, &lfsck->ml_bookmark_disk, len),
 174                             &pos);
 175         if (rc == 0) {
 176                 struct lfsck_bookmark *bm = &lfsck->ml_bookmark_ram;
 177
 178                 mdd_lfsck_bookmark_to_cpu(bm, &lfsck->ml_bookmark_disk);
 179                 if (bm->lb_magic != LFSCK_BOOKMARK_MAGIC) {
 180                         CWARN("%.16s: invalid lfsck_bookmark magic "
 181                               "0x%x != 0x%x\n", mdd_lfsck2name(lfsck),
 182                               bm->lb_magic, LFSCK_BOOKMARK_MAGIC);
 183                         /* Process it as new lfsck_bookmark. */
 184                         rc = -ENODATA;
 185                 }
 186         } else {
 187                 if (rc == -EFAULT && pos == 0)
 188                         /* return -ENODATA for empty lfsck_bookmark. */
 189                         rc = -ENODATA;
 190                 else
 191                         CERROR("%.16s: fail to load lfsck_bookmark, "
 192                                "expected = %d, rc = %d\n",
 193                                mdd_lfsck2name(lfsck), len, rc);
 194         }
 195         return rc;
 196 }
 197
 198 static int mdd_lfsck_bookmark_store(const struct lu_env *env,
 199                                     struct md_lfsck *lfsck)
 200 {
 201         struct mdd_device *mdd    = mdd_lfsck2mdd(lfsck);
 202         struct thandle    *handle;
 203         struct dt_object  *obj    = lfsck->ml_bookmark_obj;
 204         loff_t             pos    = 0;
 205         int                len    = sizeof(struct lfsck_bookmark);
 206         int                rc;
 207         ENTRY;
 208
 209         mdd_lfsck_bookmark_to_le(&lfsck->ml_bookmark_disk,
 210                                  &lfsck->ml_bookmark_ram);
 211         handle = dt_trans_create(env, mdd->mdd_bottom);
 212         if (IS_ERR(handle)) {
 213                 rc = PTR_ERR(handle);
 214                 CERROR("%.16s: fail to create trans for storing "
 215                        "lfsck_bookmark: %d\n,", mdd_lfsck2name(lfsck), rc);
 216                 RETURN(rc);
 217         }
 218
 219         rc = dt_declare_record_write(env, obj, len, 0, handle);
 220         if (rc != 0) {
 221                 CERROR("%.16s: fail to declare trans for storing "
 222                        "lfsck_bookmark: %d\n,", mdd_lfsck2name(lfsck), rc);
 223                 GOTO(out, rc);
 224         }
 225
 226         rc = dt_trans_start_local(env, mdd->mdd_bottom, handle);
 227         if (rc != 0) {
 228                 CERROR("%.16s: fail to start trans for storing "
 229                        "lfsck_bookmark: %d\n,", mdd_lfsck2name(lfsck), rc);
 230                 GOTO(out, rc);
 231         }
 232
 233         rc = dt_record_write(env, obj,
 234                              mdd_buf_get(env, &lfsck->ml_bookmark_disk, len),
 235                              &pos, handle);
 236         if (rc != 0)
 237                 CERROR("%.16s: fail to store lfsck_bookmark, expected = %d, "
 238                        "rc = %d\n", mdd_lfsck2name(lfsck), len, rc);
 239
 240         GOTO(out, rc);
 241
 242 out:
 243         dt_trans_stop(env, mdd->mdd_bottom, handle);
 244         return rc;
 245 }
 246
 247 static int mdd_lfsck_bookmark_init(const struct lu_env *env,
 248                                    struct md_lfsck *lfsck)
 249 {
 250         struct lfsck_bookmark *mb = &lfsck->ml_bookmark_ram;
 251         int rc;
 252
 253         memset(mb, 0, sizeof(mb));
 254         mb->lb_magic = LFSCK_BOOKMARK_MAGIC;
 255         mb->lb_version = LFSCK_VERSION_V1;
 256         mutex_lock(&lfsck->ml_mutex);
 257         rc = mdd_lfsck_bookmark_store(env, lfsck);
 258         mutex_unlock(&lfsck->ml_mutex);
 259         return rc;
 260 }
 261
 262 /* LFSCK engines */
 263
 264 static int mdd_lfsck_main(void *args)
 265 {
 266         struct lu_env            env;
 267         struct md_lfsck         *lfsck  = (struct md_lfsck *)args;
 268         struct ptlrpc_thread    *thread = &lfsck->ml_thread;
 269         struct dt_object        *obj    = lfsck->ml_obj_oit;
 270         const struct dt_it_ops  *iops   = &obj->do_index_ops->dio_it;
 271         struct dt_it            *di;
 272         struct lu_fid           *fid;
 273         int                      rc;
 274         ENTRY;
 275
 276         cfs_daemonize("lfsck");
 277         rc = lu_env_init(&env, LCT_MD_THREAD | LCT_DT_THREAD);
 278         if (rc != 0) {
 279                 CERROR("%s: LFSCK, fail to init env, rc = %d\n",
 280                        mdd_lfsck2name(lfsck), rc);
 281                 GOTO(noenv, rc);
 282         }
 283
 284         di = iops->init(&env, obj, lfsck->ml_args_oit, BYPASS_CAPA);
 285         if (IS_ERR(di)) {
 286                 rc = PTR_ERR(di);
 287                 CERROR("%s: LFSCK, fail to init iteration, rc = %d\n",
 288                        mdd_lfsck2name(lfsck), rc);
 289                 GOTO(fini_env, rc);
 290         }
 291
 292         CDEBUG(D_LFSCK, "LFSCK: flags = 0x%x, pid = %d\n",
 293                lfsck->ml_args_oit, cfs_curproc_pid());
 294
 295         spin_lock(&lfsck->ml_lock);
 296         thread_set_flags(thread, SVC_RUNNING);
 297         spin_unlock(&lfsck->ml_lock);
 298         cfs_waitq_broadcast(&thread->t_ctl_waitq);
 299
 300         /* The call iops->load() will unplug low layer iteration. */
 301         rc = iops->load(&env, di, 0);
 302         if (rc != 0)
 303                 GOTO(out, rc);
 304
 305         CDEBUG(D_LFSCK, "LFSCK: iteration start: pos = %s\n",
 306                (char *)iops->key(&env, di));
 307
 308         lfsck->ml_new_scanned = 0;
 309         fid = &mdd_env_info(&env)->mti_fid;
 310         while (rc == 0) {
 311                 iops->rec(&env, di, (struct dt_rec *)fid, 0);
 312
 313                 /* XXX: here, perform LFSCK when some LFSCK component(s)
 314                  *      introduced in the future. */
 315                 lfsck->ml_new_scanned++;
 316
 317                 /* XXX: here, make checkpoint when some LFSCK component(s)
 318                  *      introduced in the future. */
 319
 320                 /* Rate control. */
 321                 mdd_lfsck_control_speed(lfsck);
 322                 if (unlikely(!thread_is_running(thread)))
 323                         GOTO(out, rc = 0);
 324
 325                 rc = iops->next(&env, di);
 326         }
 327
 328         GOTO(out, rc);
 329
 330 out:
 331         if (lfsck->ml_paused) {
 332                 /* XXX: It is hack here: if the lfsck is still running when MDS
 333                  *      umounts, it should be restarted automatically after MDS
 334                  *      remounts up.
 335                  *
 336                  *      To support that, we need to record the lfsck status in
 337                  *      the lfsck on-disk bookmark file. But now, there is not
 338                  *      lfsck component under the lfsck framework. To avoid to
 339                  *      introduce unnecessary bookmark incompatibility issues,
 340                  *      we write nothing to the lfsck bookmark file now.
 341                  *
 342                  *      Instead, we will reuse dt_it_ops::put() method to notify
 343                  *      low layer iterator to process such case.
 344                  *
 345                  *      It is just temporary solution, and will be replaced when
 346                  *      some lfsck component is introduced in the future. */
 347                 iops->put(&env, di);
 348                 CDEBUG(D_LFSCK, "LFSCK: iteration pasued: pos = %s, rc = %d\n",
 349                        (char *)iops->key(&env, di), rc);
 350         } else {
 351                 CDEBUG(D_LFSCK, "LFSCK: iteration stop: pos = %s, rc = %d\n",
 352                        (char *)iops->key(&env, di), rc);
 353         }
 354         iops->fini(&env, di);
 355
 356 fini_env:
 357         lu_env_fini(&env);
 358
 359 noenv:
 360         spin_lock(&lfsck->ml_lock);
 361         thread_set_flags(thread, SVC_STOPPED);
 362         cfs_waitq_broadcast(&thread->t_ctl_waitq);
 363         spin_unlock(&lfsck->ml_lock);
 364         return rc;
 365 }
 366
 367 /* external interfaces */
 368
 369 int mdd_lfsck_set_speed(const struct lu_env *env, struct md_lfsck *lfsck,
 370                         __u32 limit)
 371 {
 372         int rc;
 373
 374         mutex_lock(&lfsck->ml_mutex);
 375         __mdd_lfsck_set_speed(lfsck, limit);
 376         rc = mdd_lfsck_bookmark_store(env, lfsck);
 377         mutex_unlock(&lfsck->ml_mutex);
 378         return rc;
 379 }
 380
 381 int mdd_lfsck_start(const struct lu_env *env, struct md_lfsck *lfsck,
 382                     struct lfsck_start *start)
 383 {
 384         struct lfsck_bookmark  *bk     = &lfsck->ml_bookmark_ram;
 385         struct ptlrpc_thread   *thread = &lfsck->ml_thread;
 386         struct lfsck_component *com;
 387         struct l_wait_info      lwi    = { 0 };
 388         bool                    dirty  = false;
 389         int                     rc     = 0;
 390         __u16                   valid  = 0;
 391         __u16                   flags  = 0;
 392         ENTRY;
 393
 394         if (lfsck->ml_obj_oit == NULL)
 395                 RETURN(-ENOTSUPP);
 396
 397         /* start == NULL means auto trigger paused LFSCK. */
 398         if (start == NULL && cfs_list_empty(&lfsck->ml_list_scan))
 399                 RETURN(0);
 400
 401         mutex_lock(&lfsck->ml_mutex);
 402         spin_lock(&lfsck->ml_lock);
 403         if (!thread_is_init(thread) && !thread_is_stopped(thread)) {
 404                 spin_unlock(&lfsck->ml_lock);
 405                 mutex_unlock(&lfsck->ml_mutex);
 406                 RETURN(-EALREADY);
 407         }
 408
 409         spin_unlock(&lfsck->ml_lock);
 410
 411         lfsck->ml_paused = 0;
 412         lfsck->ml_oit_over = 0;
 413         lfsck->ml_drop_dryrun = 0;
 414         lfsck->ml_new_scanned = 0;
 415
 416         /* For auto trigger. */
 417         if (start == NULL)
 418                 goto trigger;
 419
 420         start->ls_version = bk->lb_version;
 421         if (start->ls_valid & LSV_SPEED_LIMIT) {
 422                 __mdd_lfsck_set_speed(lfsck, start->ls_speed_limit);
 423                 dirty = true;
 424         }
 425
 426         if (start->ls_valid & LSV_ERROR_HANDLE) {
 427                 valid |= DOIV_ERROR_HANDLE;
 428                 if (start->ls_flags & LPF_FAILOUT)
 429                         flags |= DOIF_FAILOUT;
 430
 431                 if ((start->ls_flags & LPF_FAILOUT) &&
 432                     !(bk->lb_param & LPF_FAILOUT)) {
 433                         bk->lb_param |= LPF_FAILOUT;
 434                         dirty = true;
 435                 } else if (!(start->ls_flags & LPF_FAILOUT) &&
 436                            (bk->lb_param & LPF_FAILOUT)) {
 437                         bk->lb_param &= ~LPF_FAILOUT;
 438                         dirty = true;
 439                 }
 440         }
 441
 442         if (start->ls_valid & LSV_DRYRUN) {
 443                 if ((start->ls_flags & LPF_DRYRUN) &&
 444                     !(bk->lb_param & LPF_DRYRUN)) {
 445                         bk->lb_param |= LPF_DRYRUN;
 446                         dirty = true;
 447                 } else if (!(start->ls_flags & LPF_DRYRUN) &&
 448                            (bk->lb_param & LPF_DRYRUN)) {
 449                         bk->lb_param &= ~LPF_DRYRUN;
 450                         lfsck->ml_drop_dryrun = 1;
 451                         dirty = true;
 452                 }
 453         }
 454
 455         if (dirty) {
 456                 rc = mdd_lfsck_bookmark_store(env, lfsck);
 457                 if (rc != 0)
 458                         GOTO(out, rc);
 459         }
 460
 461         if (start->ls_flags & LPF_RESET)
 462                 flags |= DOIF_RESET;
 463
 464         if (start->ls_active != 0) {
 465                 struct lfsck_component *next;
 466                 __u16 type = 1;
 467
 468                 if (start->ls_active == LFSCK_TYPES_ALL)
 469                         start->ls_active = LFSCK_TYPES_SUPPORTED;
 470
 471                 if (start->ls_active & ~LFSCK_TYPES_SUPPORTED) {
 472                         start->ls_active &= ~LFSCK_TYPES_SUPPORTED;
 473                         GOTO(out, rc = -ENOTSUPP);
 474                 }
 475
 476                 cfs_list_for_each_entry_safe(com, next,
 477                                              &lfsck->ml_list_scan, lc_link) {
 478                         if (!(com->lc_type & start->ls_active)) {
 479                                 rc = com->lc_ops->lfsck_post(env, com, 0);
 480                                 if (rc != 0)
 481                                         GOTO(out, rc);
 482                         }
 483                 }
 484
 485                 while (start->ls_active != 0) {
 486                         if (type & start->ls_active) {
 487                                 com = __mdd_lfsck_component_find(lfsck, type,
 488                                                         &lfsck->ml_list_idle);
 489                                 if (com != NULL) {
 490                                         /* The component status will be updated
 491                                          * when its prep() is called later by
 492                                          * the LFSCK main engine. */
 493                                         cfs_list_del_init(&com->lc_link);
 494                                         cfs_list_add_tail(&com->lc_link,
 495                                                           &lfsck->ml_list_scan);
 496                                 }
 497                                 start->ls_active &= ~type;
 498                         }
 499                         type <<= 1;
 500                 }
 501         }
 502
 503         cfs_list_for_each_entry(com, &lfsck->ml_list_scan, lc_link) {
 504                 start->ls_active |= com->lc_type;
 505                 if (flags & DOIF_RESET) {
 506                         rc = com->lc_ops->lfsck_reset(env, com, false);
 507                         if (rc != 0)
 508                                 GOTO(out, rc);
 509                 }
 510         }
 511
 512 trigger:
 513         lfsck->ml_args_dir = LUDA_64BITHASH | LUDA_VERIFY;
 514         if (bk->lb_param & LPF_DRYRUN)
 515                 lfsck->ml_args_dir |= LUDA_VERIFY_DRYRUN;
 516
 517         if (bk->lb_param & LPF_FAILOUT) {
 518                 valid |= DOIV_ERROR_HANDLE;
 519                 flags |= DOIF_FAILOUT;
 520         }
 521
 522         if (!cfs_list_empty(&lfsck->ml_list_scan))
 523                 flags |= DOIF_OUTUSED;
 524
 525         lfsck->ml_args_oit = (flags << DT_OTABLE_IT_FLAGS_SHIFT) | valid;
 526         thread_set_flags(thread, 0);
 527         rc = cfs_create_thread(mdd_lfsck_main, lfsck, 0);
 528         if (rc < 0)
 529                 CERROR("%s: cannot start LFSCK thread, rc = %d\n",
 530                        mdd_lfsck2name(lfsck), rc);
 531         else
 532                 l_wait_event(thread->t_ctl_waitq,
 533                              thread_is_running(thread) ||
 534                              thread_is_stopped(thread),
 535                              &lwi);
 536
 537         GOTO(out, rc = 0);
 538
 539 out:
 540         mutex_unlock(&lfsck->ml_mutex);
 541         return (rc < 0 ? rc : 0);
 542 }
 543
 544 int mdd_lfsck_stop(const struct lu_env *env, struct md_lfsck *lfsck,
 545                    bool pause)
 546 {
 547         struct ptlrpc_thread *thread = &lfsck->ml_thread;
 548         struct l_wait_info    lwi    = { 0 };
 549         ENTRY;
 550
 551         mutex_lock(&lfsck->ml_mutex);
 552         spin_lock(&lfsck->ml_lock);
 553         if (thread_is_init(thread) || thread_is_stopped(thread)) {
 554                 spin_unlock(&lfsck->ml_lock);
 555                 mutex_unlock(&lfsck->ml_mutex);
 556                 RETURN(-EALREADY);
 557         }
 558
 559         if (pause)
 560                 lfsck->ml_paused = 1;
 561         thread_set_flags(thread, SVC_STOPPING);
 562         /* The LFSCK thread may be sleeping on low layer wait queue,
 563          * wake it up. */
 564         if (likely(lfsck->ml_di_oit != NULL))
 565                 lfsck->ml_obj_oit->do_index_ops->dio_it.put(env,
 566                                                             lfsck->ml_di_oit);
 567         spin_unlock(&lfsck->ml_lock);
 568
 569         cfs_waitq_broadcast(&thread->t_ctl_waitq);
 570         l_wait_event(thread->t_ctl_waitq,
 571                      thread_is_stopped(thread),
 572                      &lwi);
 573         mutex_unlock(&lfsck->ml_mutex);
 574
 575         RETURN(0);
 576 }
 577
 578 static const struct lu_fid lfsck_it_fid = { .f_seq = FID_SEQ_LOCAL_FILE,
 579                                             .f_oid = OTABLE_IT_OID,
 580                                             .f_ver = 0 };
 581
 582 int mdd_lfsck_setup(const struct lu_env *env, struct mdd_device *mdd)
 583 {
 584         struct md_lfsck  *lfsck = &mdd->mdd_lfsck;
 585         struct dt_object *obj;
 586         int               rc;
 587         ENTRY;
 588
 589         LASSERT(!lfsck->ml_initialized);
 590
 591         lfsck->ml_initialized = 1;
 592         mutex_init(&lfsck->ml_mutex);
 593         spin_lock_init(&lfsck->ml_lock);
 594         CFS_INIT_LIST_HEAD(&lfsck->ml_list_scan);
 595         CFS_INIT_LIST_HEAD(&lfsck->ml_list_dir);
 596         CFS_INIT_LIST_HEAD(&lfsck->ml_list_double_scan);
 597         CFS_INIT_LIST_HEAD(&lfsck->ml_list_idle);
 598         cfs_waitq_init(&lfsck->ml_thread.t_ctl_waitq);
 599
 600         obj = dt_locate(env, mdd->mdd_bottom, &lfsck_it_fid);
 601         if (IS_ERR(obj))
 602                 RETURN(PTR_ERR(obj));
 603
 604         lfsck->ml_obj_oit = obj;
 605         rc = obj->do_ops->do_index_try(env, obj, &dt_otable_features);
 606         if (rc != 0) {
 607                 if (rc == -ENOTSUPP)
 608                         rc = 0;
 609
 610                 RETURN(rc);
 611         }
 612
 613         obj = dt_store_open(env, mdd->mdd_bottom, "", lfsck_bookmark_name,
 614                             &mdd_env_info(env)->mti_fid);
 615         if (IS_ERR(obj))
 616                 RETURN(PTR_ERR(obj));
 617
 618         lfsck->ml_bookmark_obj = obj;
 619         rc = mdd_lfsck_bookmark_load(env, lfsck);
 620         if (rc == -ENODATA)
 621                 rc = mdd_lfsck_bookmark_init(env, lfsck);
 622
 623         /* XXX: LFSCK components initialization to be added here. */
 624
 625         RETURN(rc);
 626 }
 627
 628 void mdd_lfsck_cleanup(const struct lu_env *env, struct mdd_device *mdd)
 629 {
 630         struct md_lfsck         *lfsck  = &mdd->mdd_lfsck;
 631         struct ptlrpc_thread    *thread = &lfsck->ml_thread;
 632         struct lfsck_component  *com;
 633
 634         if (!lfsck->ml_initialized)
 635                 return;
 636
 637         LASSERT(thread_is_init(thread) || thread_is_stopped(thread));
 638
 639         if (lfsck->ml_obj_oit != NULL) {
 640                 lu_object_put(env, &lfsck->ml_obj_oit->do_lu);
 641                 lfsck->ml_obj_oit = NULL;
 642         }
 643
 644         LASSERT(lfsck->ml_obj_dir == NULL);
 645
 646         if (lfsck->ml_bookmark_obj != NULL) {
 647                 lu_object_put(env, &lfsck->ml_bookmark_obj->do_lu);
 648                 lfsck->ml_bookmark_obj = NULL;
 649         }
 650
 651         while (!cfs_list_empty(&lfsck->ml_list_scan)) {
 652                 com = cfs_list_entry(lfsck->ml_list_scan.next,
 653                                      struct lfsck_component,
 654                                      lc_link);
 655                 mdd_lfsck_component_cleanup(env, com);
 656         }
 657
 658         LASSERT(cfs_list_empty(&lfsck->ml_list_dir));
 659
 660         while (!cfs_list_empty(&lfsck->ml_list_double_scan)) {
 661                 com = cfs_list_entry(lfsck->ml_list_double_scan.next,
 662                                      struct lfsck_component,
 663                                      lc_link);
 664                 mdd_lfsck_component_cleanup(env, com);
 665         }
 666
 667         while (!cfs_list_empty(&lfsck->ml_list_idle)) {
 668                 com = cfs_list_entry(lfsck->ml_list_idle.next,
 669                                      struct lfsck_component,
 670                                      lc_link);
 671                 mdd_lfsck_component_cleanup(env, com);
 672         }
 673 }