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 #define MDS_DIR_DUMMY_START             0xffffffffffffffffULL
  51
  52 #define LFSCK_NAMEENTRY_DEAD            1 /* The object has been unlinked. */
  53 #define LFSCK_NAMEENTRY_REMOVED         2 /* The entry has been removed. */
  54 #define LFSCK_NAMEENTRY_RECREATED       3 /* The entry has been recreated. */
  55
  56 const char lfsck_bookmark_name[] = "lfsck_bookmark";
  57 const char lfsck_namespace_name[] = "lfsck_namespace";
  58
  59 static const char *lfsck_status_names[] = {
  60         "init",
  61         "scanning-phase1",
  62         "scanning-phase2",
  63         "completed",
  64         "failed",
  65         "stopped",
  66         "paused",
  67         "crashed",
  68         NULL
  69 };
  70
  71 static const char *lfsck_flags_names[] = {
  72         "scanned-once",
  73         "inconsistent",
  74         "upgrade",
  75         NULL
  76 };
  77
  78 static const char *lfsck_param_names[] = {
  79         "failout",
  80         "dryrun",
  81         NULL
  82 };
  83
  84 /* misc functions */
  85
  86 static inline struct mdd_device *mdd_lfsck2mdd(struct md_lfsck *lfsck)
  87 {
  88         return container_of0(lfsck, struct mdd_device, mdd_lfsck);
  89 }
  90
  91 static inline char *mdd_lfsck2name(struct md_lfsck *lfsck)
  92 {
  93         struct mdd_device *mdd = mdd_lfsck2mdd(lfsck);
  94
  95         return mdd2obd_dev(mdd)->obd_name;
  96 }
  97
  98 static inline void mdd_lfsck_component_get(struct lfsck_component *com)
  99 {
 100         atomic_inc(&com->lc_ref);
 101 }
 102
 103 static inline void mdd_lfsck_component_put(const struct lu_env *env,
 104                                            struct lfsck_component *com)
 105 {
 106         if (atomic_dec_and_test(&com->lc_ref)) {
 107                 if (com->lc_obj != NULL)
 108                         lu_object_put(env, &com->lc_obj->do_lu);
 109                 if (com->lc_file_ram != NULL)
 110                         OBD_FREE(com->lc_file_ram, com->lc_file_size);
 111                 if (com->lc_file_disk != NULL)
 112                         OBD_FREE(com->lc_file_disk, com->lc_file_size);
 113                 OBD_FREE_PTR(com);
 114         }
 115 }
 116
 117 static inline struct lfsck_component *
 118 __mdd_lfsck_component_find(struct md_lfsck *lfsck, __u16 type, cfs_list_t *list)
 119 {
 120         struct lfsck_component *com;
 121
 122         cfs_list_for_each_entry(com, list, lc_link) {
 123                 if (com->lc_type == type)
 124                         return com;
 125         }
 126         return NULL;
 127 }
 128
 129 static struct lfsck_component *
 130 mdd_lfsck_component_find(struct md_lfsck *lfsck, __u16 type)
 131 {
 132         struct lfsck_component *com;
 133
 134         spin_lock(&lfsck->ml_lock);
 135         com = __mdd_lfsck_component_find(lfsck, type, &lfsck->ml_list_scan);
 136         if (com != NULL)
 137                 goto unlock;
 138
 139         com = __mdd_lfsck_component_find(lfsck, type,
 140                                          &lfsck->ml_list_double_scan);
 141         if (com != NULL)
 142                 goto unlock;
 143
 144         com = __mdd_lfsck_component_find(lfsck, type, &lfsck->ml_list_idle);
 145
 146 unlock:
 147         if (com != NULL)
 148                 mdd_lfsck_component_get(com);
 149         spin_unlock(&lfsck->ml_lock);
 150         return com;
 151 }
 152
 153 static void mdd_lfsck_component_cleanup(const struct lu_env *env,
 154                                         struct lfsck_component *com)
 155 {
 156         if (!cfs_list_empty(&com->lc_link))
 157                 cfs_list_del_init(&com->lc_link);
 158         if (!cfs_list_empty(&com->lc_link_dir))
 159                 cfs_list_del_init(&com->lc_link_dir);
 160
 161         mdd_lfsck_component_put(env, com);
 162 }
 163
 164 static int lfsck_bits_dump(char **buf, int *len, int bits, const char *names[],
 165                            const char *prefix)
 166 {
 167         int save = *len;
 168         int flag;
 169         int rc;
 170         int i;
 171
 172         rc = snprintf(*buf, *len, "%s:%c", prefix, bits != 0 ? ' ' : '\n');
 173         if (rc <= 0)
 174                 return -ENOSPC;
 175
 176         *buf += rc;
 177         *len -= rc;
 178         for (i = 0, flag = 1; bits != 0; i++, flag = 1 << i) {
 179                 if (flag & bits) {
 180                         bits &= ~flag;
 181                         rc = snprintf(*buf, *len, "%s%c", names[i],
 182                                       bits != 0 ? ',' : '\n');
 183                         if (rc <= 0)
 184                                 return -ENOSPC;
 185
 186                         *buf += rc;
 187                         *len -= rc;
 188                 }
 189         }
 190         return save - *len;
 191 }
 192
 193 static int lfsck_time_dump(char **buf, int *len, __u64 time, const char *prefix)
 194 {
 195         int rc;
 196
 197         if (time != 0)
 198                 rc = snprintf(*buf, *len, "%s: "LPU64" seconds\n", prefix,
 199                               cfs_time_current_sec() - time);
 200         else
 201                 rc = snprintf(*buf, *len, "%s: N/A\n", prefix);
 202         if (rc <= 0)
 203                 return -ENOSPC;
 204
 205         *buf += rc;
 206         *len -= rc;
 207         return rc;
 208 }
 209
 210 static int lfsck_pos_dump(char **buf, int *len, struct lfsck_position *pos,
 211                           const char *prefix)
 212 {
 213         int rc;
 214
 215         if (fid_is_zero(&pos->lp_dir_parent)) {
 216                 if (pos->lp_oit_cookie == 0)
 217                         rc = snprintf(*buf, *len, "%s: N/A, N/A, N/A\n",
 218                                       prefix);
 219                 else
 220                         rc = snprintf(*buf, *len, "%s: "LPU64", N/A, N/A\n",
 221                                       prefix, pos->lp_oit_cookie);
 222         } else {
 223                 rc = snprintf(*buf, *len, "%s: "LPU64", "DFID", "LPU64"\n",
 224                               prefix, pos->lp_oit_cookie,
 225                               PFID(&pos->lp_dir_parent), pos->lp_dir_cookie);
 226         }
 227         if (rc <= 0)
 228                 return -ENOSPC;
 229
 230         *buf += rc;
 231         *len -= rc;
 232         return rc;
 233 }
 234
 235 static void mdd_lfsck_pos_fill(const struct lu_env *env, struct md_lfsck *lfsck,
 236                                struct lfsck_position *pos, bool oit_processed,
 237                                bool dir_processed)
 238 {
 239         const struct dt_it_ops *iops = &lfsck->ml_obj_oit->do_index_ops->dio_it;
 240
 241         spin_lock(&lfsck->ml_lock);
 242         if (unlikely(lfsck->ml_di_oit == NULL)) {
 243                 spin_unlock(&lfsck->ml_lock);
 244                 memset(pos, 0, sizeof(*pos));
 245                 return;
 246         }
 247
 248         pos->lp_oit_cookie = iops->store(env, lfsck->ml_di_oit);
 249
 250         LASSERT(pos->lp_oit_cookie > 0);
 251
 252         if (!oit_processed)
 253                 pos->lp_oit_cookie--;
 254
 255         if (lfsck->ml_di_dir != NULL) {
 256                 struct dt_object *dto = lfsck->ml_obj_dir;
 257
 258                 pos->lp_dir_parent = *lu_object_fid(&dto->do_lu);
 259                 pos->lp_dir_cookie = dto->do_index_ops->dio_it.store(env,
 260                                                         lfsck->ml_di_dir);
 261
 262                 LASSERT(pos->lp_dir_cookie != MDS_DIR_DUMMY_START);
 263
 264                 if (pos->lp_dir_cookie >= MDS_DIR_END_OFF)
 265                         pos->lp_dir_cookie = MDS_DIR_END_OFF;
 266                 else if (!dir_processed)
 267                         /* For the dir which just to be processed,
 268                          * lp_dir_cookie will become MDS_DIR_DUMMY_START,
 269                          * which can be correctly handled by mdd_lfsck_prep. */
 270                         pos->lp_dir_cookie--;
 271         } else {
 272                 fid_zero(&pos->lp_dir_parent);
 273                 pos->lp_dir_cookie = 0;
 274         }
 275         spin_unlock(&lfsck->ml_lock);
 276 }
 277
 278 static inline void mdd_lfsck_pos_set_zero(struct lfsck_position *pos)
 279 {
 280         memset(pos, 0, sizeof(*pos));
 281 }
 282
 283 static inline int mdd_lfsck_pos_is_zero(const struct lfsck_position *pos)
 284 {
 285         return pos->lp_oit_cookie == 0 && fid_is_zero(&pos->lp_dir_parent);
 286 }
 287
 288 static inline int mdd_lfsck_pos_is_eq(const struct lfsck_position *pos1,
 289                                       const struct lfsck_position *pos2)
 290 {
 291         if (pos1->lp_oit_cookie < pos2->lp_oit_cookie)
 292                 return -1;
 293
 294         if (pos1->lp_oit_cookie > pos2->lp_oit_cookie)
 295                 return 1;
 296
 297         if (fid_is_zero(&pos1->lp_dir_parent) &&
 298             !fid_is_zero(&pos2->lp_dir_parent))
 299                 return -1;
 300
 301         if (!fid_is_zero(&pos1->lp_dir_parent) &&
 302             fid_is_zero(&pos2->lp_dir_parent))
 303                 return 1;
 304
 305         if (fid_is_zero(&pos1->lp_dir_parent) &&
 306             fid_is_zero(&pos2->lp_dir_parent))
 307                 return 0;
 308
 309         LASSERT(lu_fid_eq(&pos1->lp_dir_parent, &pos2->lp_dir_parent));
 310
 311         if (pos1->lp_dir_cookie < pos2->lp_dir_cookie)
 312                 return -1;
 313
 314         if (pos1->lp_dir_cookie > pos2->lp_dir_cookie)
 315                 return 1;
 316
 317         return 0;
 318 }
 319
 320 static void mdd_lfsck_close_dir(const struct lu_env *env,
 321                                 struct md_lfsck *lfsck)
 322 {
 323         struct dt_object        *dir_obj  = lfsck->ml_obj_dir;
 324         const struct dt_it_ops  *dir_iops = &dir_obj->do_index_ops->dio_it;
 325         struct dt_it            *dir_di   = lfsck->ml_di_dir;
 326
 327         spin_lock(&lfsck->ml_lock);
 328         lfsck->ml_di_dir = NULL;
 329         spin_unlock(&lfsck->ml_lock);
 330
 331         dir_iops->put(env, dir_di);
 332         dir_iops->fini(env, dir_di);
 333         lfsck->ml_obj_dir = NULL;
 334         lu_object_put(env, &dir_obj->do_lu);
 335 }
 336
 337 static void __mdd_lfsck_set_speed(struct md_lfsck *lfsck, __u32 limit)
 338 {
 339         lfsck->ml_bookmark_ram.lb_speed_limit = limit;
 340         if (limit != LFSCK_SPEED_NO_LIMIT) {
 341                 if (limit > CFS_HZ) {
 342                         lfsck->ml_sleep_rate = limit / CFS_HZ;
 343                         lfsck->ml_sleep_jif = 1;
 344                 } else {
 345                         lfsck->ml_sleep_rate = 1;
 346                         lfsck->ml_sleep_jif = CFS_HZ / limit;
 347                 }
 348         } else {
 349                 lfsck->ml_sleep_jif = 0;
 350                 lfsck->ml_sleep_rate = 0;
 351         }
 352 }
 353
 354 static void mdd_lfsck_control_speed(struct md_lfsck *lfsck)
 355 {
 356         struct ptlrpc_thread *thread = &lfsck->ml_thread;
 357         struct l_wait_info    lwi;
 358
 359         if (lfsck->ml_sleep_jif > 0 &&
 360             lfsck->ml_new_scanned >= lfsck->ml_sleep_rate) {
 361                 spin_lock(&lfsck->ml_lock);
 362                 if (likely(lfsck->ml_sleep_jif > 0 &&
 363                            lfsck->ml_new_scanned >= lfsck->ml_sleep_rate)) {
 364                         lwi = LWI_TIMEOUT_INTR(lfsck->ml_sleep_jif, NULL,
 365                                                LWI_ON_SIGNAL_NOOP, NULL);
 366                         spin_unlock(&lfsck->ml_lock);
 367
 368                         l_wait_event(thread->t_ctl_waitq,
 369                                      !thread_is_running(thread),
 370                                      &lwi);
 371                         lfsck->ml_new_scanned = 0;
 372                 } else {
 373                         spin_unlock(&lfsck->ml_lock);
 374                 }
 375         }
 376 }
 377
 378 /* lfsck_bookmark file ops */
 379
 380 static void inline mdd_lfsck_bookmark_to_cpu(struct lfsck_bookmark *des,
 381                                              struct lfsck_bookmark *src)
 382 {
 383         des->lb_magic = le32_to_cpu(src->lb_magic);
 384         des->lb_version = le16_to_cpu(src->lb_version);
 385         des->lb_param = le16_to_cpu(src->lb_param);
 386         des->lb_speed_limit = le32_to_cpu(src->lb_speed_limit);
 387 }
 388
 389 static void inline mdd_lfsck_bookmark_to_le(struct lfsck_bookmark *des,
 390                                             struct lfsck_bookmark *src)
 391 {
 392         des->lb_magic = cpu_to_le32(src->lb_magic);
 393         des->lb_version = cpu_to_le16(src->lb_version);
 394         des->lb_param = cpu_to_le16(src->lb_param);
 395         des->lb_speed_limit = cpu_to_le32(src->lb_speed_limit);
 396 }
 397
 398 static int mdd_lfsck_bookmark_load(const struct lu_env *env,
 399                                    struct md_lfsck *lfsck)
 400 {
 401         loff_t pos = 0;
 402         int    len = sizeof(struct lfsck_bookmark);
 403         int    rc;
 404
 405         rc = dt_record_read(env, lfsck->ml_bookmark_obj,
 406                             mdd_buf_get(env, &lfsck->ml_bookmark_disk, len),
 407                             &pos);
 408         if (rc == 0) {
 409                 struct lfsck_bookmark *bm = &lfsck->ml_bookmark_ram;
 410
 411                 mdd_lfsck_bookmark_to_cpu(bm, &lfsck->ml_bookmark_disk);
 412                 if (bm->lb_magic != LFSCK_BOOKMARK_MAGIC) {
 413                         CWARN("%.16s: invalid lfsck_bookmark magic "
 414                               "0x%x != 0x%x\n", mdd_lfsck2name(lfsck),
 415                               bm->lb_magic, LFSCK_BOOKMARK_MAGIC);
 416                         /* Process it as new lfsck_bookmark. */
 417                         rc = -ENODATA;
 418                 }
 419         } else {
 420                 if (rc == -EFAULT && pos == 0)
 421                         /* return -ENODATA for empty lfsck_bookmark. */
 422                         rc = -ENODATA;
 423                 else
 424                         CERROR("%.16s: fail to load lfsck_bookmark, "
 425                                "expected = %d, rc = %d\n",
 426                                mdd_lfsck2name(lfsck), len, rc);
 427         }
 428         return rc;
 429 }
 430
 431 static int mdd_lfsck_bookmark_store(const struct lu_env *env,
 432                                     struct md_lfsck *lfsck)
 433 {
 434         struct mdd_device *mdd    = mdd_lfsck2mdd(lfsck);
 435         struct thandle    *handle;
 436         struct dt_object  *obj    = lfsck->ml_bookmark_obj;
 437         loff_t             pos    = 0;
 438         int                len    = sizeof(struct lfsck_bookmark);
 439         int                rc;
 440         ENTRY;
 441
 442         mdd_lfsck_bookmark_to_le(&lfsck->ml_bookmark_disk,
 443                                  &lfsck->ml_bookmark_ram);
 444         handle = dt_trans_create(env, mdd->mdd_bottom);
 445         if (IS_ERR(handle)) {
 446                 rc = PTR_ERR(handle);
 447                 CERROR("%.16s: fail to create trans for storing "
 448                        "lfsck_bookmark: %d\n,", mdd_lfsck2name(lfsck), rc);
 449                 RETURN(rc);
 450         }
 451
 452         rc = dt_declare_record_write(env, obj, len, 0, handle);
 453         if (rc != 0) {
 454                 CERROR("%.16s: fail to declare trans for storing "
 455                        "lfsck_bookmark: %d\n,", mdd_lfsck2name(lfsck), rc);
 456                 GOTO(out, rc);
 457         }
 458
 459         rc = dt_trans_start_local(env, mdd->mdd_bottom, handle);
 460         if (rc != 0) {
 461                 CERROR("%.16s: fail to start trans for storing "
 462                        "lfsck_bookmark: %d\n,", mdd_lfsck2name(lfsck), rc);
 463                 GOTO(out, rc);
 464         }
 465
 466         rc = dt_record_write(env, obj,
 467                              mdd_buf_get(env, &lfsck->ml_bookmark_disk, len),
 468                              &pos, handle);
 469         if (rc != 0)
 470                 CERROR("%.16s: fail to store lfsck_bookmark, expected = %d, "
 471                        "rc = %d\n", mdd_lfsck2name(lfsck), len, rc);
 472
 473         GOTO(out, rc);
 474
 475 out:
 476         dt_trans_stop(env, mdd->mdd_bottom, handle);
 477         return rc;
 478 }
 479
 480 static int mdd_lfsck_bookmark_init(const struct lu_env *env,
 481                                    struct md_lfsck *lfsck)
 482 {
 483         struct lfsck_bookmark *mb = &lfsck->ml_bookmark_ram;
 484         int rc;
 485
 486         memset(mb, 0, sizeof(*mb));
 487         mb->lb_magic = LFSCK_BOOKMARK_MAGIC;
 488         mb->lb_version = LFSCK_VERSION_V2;
 489         mutex_lock(&lfsck->ml_mutex);
 490         rc = mdd_lfsck_bookmark_store(env, lfsck);
 491         mutex_unlock(&lfsck->ml_mutex);
 492         return rc;
 493 }
 494
 495 /* lfsck_namespace file ops */
 496
 497 static void inline mdd_lfsck_position_to_cpu(struct lfsck_position *des,
 498                                              struct lfsck_position *src)
 499 {
 500         des->lp_oit_cookie = le64_to_cpu(src->lp_oit_cookie);
 501         fid_le_to_cpu(&des->lp_dir_parent, &src->lp_dir_parent);
 502         des->lp_dir_cookie = le64_to_cpu(src->lp_dir_cookie);
 503 }
 504
 505 static void inline mdd_lfsck_position_to_le(struct lfsck_position *des,
 506                                              struct lfsck_position *src)
 507 {
 508         des->lp_oit_cookie = cpu_to_le64(src->lp_oit_cookie);
 509         fid_cpu_to_le(&des->lp_dir_parent, &src->lp_dir_parent);
 510         des->lp_dir_cookie = cpu_to_le64(src->lp_dir_cookie);
 511 }
 512
 513 static void inline mdd_lfsck_namespace_to_cpu(struct lfsck_namespace *des,
 514                                               struct lfsck_namespace *src)
 515 {
 516         des->ln_magic = le32_to_cpu(src->ln_magic);
 517         des->ln_status = le32_to_cpu(src->ln_status);
 518         des->ln_flags = le32_to_cpu(src->ln_flags);
 519         des->ln_success_count = le32_to_cpu(src->ln_success_count);
 520         des->ln_run_time_phase1 = le32_to_cpu(src->ln_run_time_phase1);
 521         des->ln_run_time_phase2 = le32_to_cpu(src->ln_run_time_phase2);
 522         des->ln_time_last_complete = le64_to_cpu(src->ln_time_last_complete);
 523         des->ln_time_latest_start = le64_to_cpu(src->ln_time_latest_start);
 524         des->ln_time_last_checkpoint =
 525                                 le64_to_cpu(src->ln_time_last_checkpoint);
 526         mdd_lfsck_position_to_cpu(&des->ln_pos_latest_start,
 527                                   &src->ln_pos_latest_start);
 528         mdd_lfsck_position_to_cpu(&des->ln_pos_last_checkpoint,
 529                                   &src->ln_pos_last_checkpoint);
 530         mdd_lfsck_position_to_cpu(&des->ln_pos_first_inconsistent,
 531                                   &src->ln_pos_first_inconsistent);
 532         des->ln_items_checked = le64_to_cpu(src->ln_items_checked);
 533         des->ln_items_repaired = le64_to_cpu(src->ln_items_repaired);
 534         des->ln_items_failed = le64_to_cpu(src->ln_items_failed);
 535         des->ln_dirs_checked = le64_to_cpu(src->ln_dirs_checked);
 536         des->ln_mlinked_checked = le64_to_cpu(src->ln_mlinked_checked);
 537         des->ln_objs_checked_phase2 = le64_to_cpu(src->ln_objs_checked_phase2);
 538         des->ln_objs_repaired_phase2 =
 539                                 le64_to_cpu(src->ln_objs_repaired_phase2);
 540         des->ln_objs_failed_phase2 = le64_to_cpu(src->ln_objs_failed_phase2);
 541         des->ln_objs_nlink_repaired = le64_to_cpu(src->ln_objs_nlink_repaired);
 542         des->ln_objs_lost_found = le64_to_cpu(src->ln_objs_lost_found);
 543         fid_le_to_cpu(&des->ln_fid_latest_scanned_phase2,
 544                       &src->ln_fid_latest_scanned_phase2);
 545 }
 546
 547 static void inline mdd_lfsck_namespace_to_le(struct lfsck_namespace *des,
 548                                              struct lfsck_namespace *src)
 549 {
 550         des->ln_magic = cpu_to_le32(src->ln_magic);
 551         des->ln_status = cpu_to_le32(src->ln_status);
 552         des->ln_flags = cpu_to_le32(src->ln_flags);
 553         des->ln_success_count = cpu_to_le32(src->ln_success_count);
 554         des->ln_run_time_phase1 = cpu_to_le32(src->ln_run_time_phase1);
 555         des->ln_run_time_phase2 = cpu_to_le32(src->ln_run_time_phase2);
 556         des->ln_time_last_complete = cpu_to_le64(src->ln_time_last_complete);
 557         des->ln_time_latest_start = cpu_to_le64(src->ln_time_latest_start);
 558         des->ln_time_last_checkpoint =
 559                                 cpu_to_le64(src->ln_time_last_checkpoint);
 560         mdd_lfsck_position_to_le(&des->ln_pos_latest_start,
 561                                  &src->ln_pos_latest_start);
 562         mdd_lfsck_position_to_le(&des->ln_pos_last_checkpoint,
 563                                  &src->ln_pos_last_checkpoint);
 564         mdd_lfsck_position_to_le(&des->ln_pos_first_inconsistent,
 565                                  &src->ln_pos_first_inconsistent);
 566         des->ln_items_checked = cpu_to_le64(src->ln_items_checked);
 567         des->ln_items_repaired = cpu_to_le64(src->ln_items_repaired);
 568         des->ln_items_failed = cpu_to_le64(src->ln_items_failed);
 569         des->ln_dirs_checked = cpu_to_le64(src->ln_dirs_checked);
 570         des->ln_mlinked_checked = cpu_to_le64(src->ln_mlinked_checked);
 571         des->ln_objs_checked_phase2 = cpu_to_le64(src->ln_objs_checked_phase2);
 572         des->ln_objs_repaired_phase2 =
 573                                 cpu_to_le64(src->ln_objs_repaired_phase2);
 574         des->ln_objs_failed_phase2 = cpu_to_le64(src->ln_objs_failed_phase2);
 575         des->ln_objs_nlink_repaired = cpu_to_le64(src->ln_objs_nlink_repaired);
 576         des->ln_objs_lost_found = cpu_to_le64(src->ln_objs_lost_found);
 577         fid_cpu_to_le(&des->ln_fid_latest_scanned_phase2,
 578                       &src->ln_fid_latest_scanned_phase2);
 579 }
 580
 581 /**
 582  * \retval +ve: the lfsck_namespace is broken, the caller should reset it.
 583  * \retval 0: succeed.
 584  * \retval -ve: failed cases.
 585  */
 586 static int mdd_lfsck_namespace_load(const struct lu_env *env,
 587                                     struct lfsck_component *com)
 588 {
 589         int len = com->lc_file_size;
 590         int rc;
 591
 592         rc = dt_xattr_get(env, com->lc_obj,
 593                           mdd_buf_get(env, com->lc_file_disk, len),
 594                           XATTR_NAME_LFSCK_NAMESPACE, BYPASS_CAPA);
 595         if (rc == len) {
 596                 struct lfsck_namespace *ns = com->lc_file_ram;
 597
 598                 mdd_lfsck_namespace_to_cpu(ns,
 599                                 (struct lfsck_namespace *)com->lc_file_disk);
 600                 if (ns->ln_magic != LFSCK_NAMESPACE_MAGIC) {
 601                         CWARN("%.16s: invalid lfsck_namespace magic "
 602                               "0x%x != 0x%x\n",
 603                               mdd_lfsck2name(com->lc_lfsck),
 604                               ns->ln_magic, LFSCK_NAMESPACE_MAGIC);
 605                         rc = 1;
 606                 } else {
 607                         rc = 0;
 608                 }
 609         } else if (rc != -ENODATA) {
 610                 CERROR("%.16s: fail to load lfsck_namespace, expected = %d, "
 611                        "rc = %d\n", mdd_lfsck2name(com->lc_lfsck), len, rc);
 612                 if (rc >= 0)
 613                         rc = 1;
 614         }
 615         return rc;
 616 }
 617
 618 static int mdd_lfsck_namespace_store(const struct lu_env *env,
 619                                      struct lfsck_component *com, bool init)
 620 {
 621         struct dt_object  *obj    = com->lc_obj;
 622         struct md_lfsck   *lfsck  = com->lc_lfsck;
 623         struct mdd_device *mdd    = mdd_lfsck2mdd(lfsck);
 624         struct thandle    *handle;
 625         int                len    = com->lc_file_size;
 626         int                rc;
 627         ENTRY;
 628
 629         mdd_lfsck_namespace_to_le((struct lfsck_namespace *)com->lc_file_disk,
 630                                   (struct lfsck_namespace *)com->lc_file_ram);
 631         handle = dt_trans_create(env, mdd->mdd_bottom);
 632         if (IS_ERR(handle)) {
 633                 rc = PTR_ERR(handle);
 634                 CERROR("%.16s: fail to create trans for storing "
 635                        "lfsck_namespace: %d\n,", mdd_lfsck2name(lfsck), rc);
 636                 RETURN(rc);
 637         }
 638
 639         rc = dt_declare_xattr_set(env, obj,
 640                                   mdd_buf_get(env, com->lc_file_disk, len),
 641                                   XATTR_NAME_LFSCK_NAMESPACE, 0, handle);
 642         if (rc != 0) {
 643                 CERROR("%.16s: fail to declare trans for storing "
 644                        "lfsck_namespace: %d\n,", mdd_lfsck2name(lfsck), rc);
 645                 GOTO(out, rc);
 646         }
 647
 648         rc = dt_trans_start_local(env, mdd->mdd_bottom, handle);
 649         if (rc != 0) {
 650                 CERROR("%.16s: fail to start trans for storing "
 651                        "lfsck_namespace: %d\n,", mdd_lfsck2name(lfsck), rc);
 652                 GOTO(out, rc);
 653         }
 654
 655         rc = dt_xattr_set(env, obj,
 656                           mdd_buf_get(env, com->lc_file_disk, len),
 657                           XATTR_NAME_LFSCK_NAMESPACE,
 658                           init ? LU_XATTR_CREATE : LU_XATTR_REPLACE,
 659                           handle, BYPASS_CAPA);
 660         if (rc != 0)
 661                 CERROR("%.16s: fail to store lfsck_namespace, len = %d, "
 662                        "rc = %d\n", mdd_lfsck2name(lfsck), len, rc);
 663
 664         GOTO(out, rc);
 665
 666 out:
 667         dt_trans_stop(env, mdd->mdd_bottom, handle);
 668         return rc;
 669 }
 670
 671 static int mdd_lfsck_namespace_init(const struct lu_env *env,
 672                                     struct lfsck_component *com)
 673 {
 674         struct lfsck_namespace *ns = (struct lfsck_namespace *)com->lc_file_ram;
 675         int rc;
 676
 677         memset(ns, 0, sizeof(*ns));
 678         ns->ln_magic = LFSCK_NAMESPACE_MAGIC;
 679         ns->ln_status = LS_INIT;
 680         down_write(&com->lc_sem);
 681         rc = mdd_lfsck_namespace_store(env, com, true);
 682         up_write(&com->lc_sem);
 683         return rc;
 684 }
 685
 686 static int mdd_declare_lfsck_namespace_unlink(const struct lu_env *env,
 687                                               struct mdd_device *mdd,
 688                                               struct dt_object *p,
 689                                               struct dt_object *c,
 690                                               const char *name,
 691                                               struct thandle *handle)
 692 {
 693         int rc;
 694
 695         rc = dt_declare_delete(env, p, (const struct dt_key *)name, handle);
 696         if (rc != 0)
 697                 return rc;
 698
 699         rc = dt_declare_ref_del(env, c, handle);
 700         if (rc != 0)
 701                 return rc;
 702
 703         rc = dt_declare_destroy(env, c, handle);
 704         return rc;
 705 }
 706
 707 static int mdd_lfsck_namespace_unlink(const struct lu_env *env,
 708                                       struct mdd_device *mdd,
 709                                       struct lfsck_component *com)
 710 {
 711         struct mdd_thread_info  *info   = mdd_env_info(env);
 712         struct lu_fid           *fid    = &info->mti_fid;
 713         struct dt_object        *child  = com->lc_obj;
 714         struct dt_object        *parent;
 715         struct thandle          *handle;
 716         bool                     locked = false;
 717         int                      rc;
 718         ENTRY;
 719
 720         parent = dt_store_resolve(env, mdd->mdd_bottom, "", fid);
 721         if (IS_ERR(parent))
 722                 RETURN(rc = PTR_ERR(parent));
 723
 724         if (!dt_try_as_dir(env, parent))
 725                 GOTO(out, rc = -ENOTDIR);
 726
 727         handle = dt_trans_create(env, mdd->mdd_bottom);
 728         if (IS_ERR(handle))
 729                 GOTO(out, rc = PTR_ERR(handle));
 730
 731         rc = mdd_declare_lfsck_namespace_unlink(env, mdd, parent, child,
 732                                                 lfsck_namespace_name, handle);
 733         if (rc != 0)
 734                 GOTO(stop, rc);
 735
 736         rc = dt_trans_start_local(env, mdd->mdd_bottom, handle);
 737         if (rc != 0)
 738                 GOTO(stop, rc);
 739
 740         dt_write_lock(env, child, MOR_TGT_CHILD);
 741         locked = true;
 742         rc = dt_delete(env, parent, (struct dt_key *)lfsck_namespace_name,
 743                        handle, BYPASS_CAPA);
 744         if (rc != 0)
 745                 GOTO(stop, rc);
 746
 747         rc = child->do_ops->do_ref_del(env, child, handle);
 748         if (rc != 0) {
 749                 lu_local_obj_fid(fid, LFSCK_NAMESPACE_OID);
 750                 rc = dt_insert(env, parent,
 751                                (const struct dt_rec*)fid,
 752                                (const struct dt_key *)lfsck_namespace_name,
 753                                handle, BYPASS_CAPA, 1);
 754
 755                 GOTO(stop, rc);
 756         }
 757
 758
 759         rc = dt_destroy(env, child, handle);
 760
 761         GOTO(stop, rc);
 762
 763 stop:
 764         if (locked)
 765                 dt_write_unlock(env, child);
 766
 767         if (rc == 0) {
 768                 lu_object_put(env, &child->do_lu);
 769                 com->lc_obj = NULL;
 770         }
 771
 772         dt_trans_stop(env, mdd->mdd_bottom, handle);
 773
 774 out:
 775         lu_object_put(env, &parent->do_lu);
 776         return rc;
 777 }
 778
 779 static int mdd_lfsck_namespace_lookup(const struct lu_env *env,
 780                                       struct lfsck_component *com,
 781                                       const struct lu_fid *fid,
 782                                       __u8 *flags)
 783 {
 784         struct lu_fid *key = &mdd_env_info(env)->mti_fid;
 785         int            rc;
 786
 787         fid_cpu_to_be(key, fid);
 788         rc = dt_lookup(env, com->lc_obj, (struct dt_rec *)flags,
 789                        (const struct dt_key *)key, BYPASS_CAPA);
 790         return rc;
 791 }
 792
 793 static int mdd_lfsck_namespace_delete(const struct lu_env *env,
 794                                       struct lfsck_component *com,
 795                                       const struct lu_fid *fid)
 796 {
 797         struct mdd_device *mdd    = mdd_lfsck2mdd(com->lc_lfsck);
 798         struct lu_fid     *key    = &mdd_env_info(env)->mti_fid;
 799         struct thandle    *handle;
 800         struct dt_object *obj     = com->lc_obj;
 801         int               rc;
 802         ENTRY;
 803
 804         handle = dt_trans_create(env, mdd->mdd_bottom);
 805         if (IS_ERR(handle))
 806                 RETURN(PTR_ERR(handle));
 807
 808         rc = dt_declare_delete(env, obj, (const struct dt_key *)fid, handle);
 809         if (rc != 0)
 810                 GOTO(out, rc);
 811
 812         rc = dt_trans_start_local(env, mdd->mdd_bottom, handle);
 813         if (rc != 0)
 814                 GOTO(out, rc);
 815
 816         fid_cpu_to_be(key, fid);
 817         rc = dt_delete(env, obj, (const struct dt_key *)key, handle,
 818                        BYPASS_CAPA);
 819
 820         GOTO(out, rc);
 821
 822 out:
 823         dt_trans_stop(env, mdd->mdd_bottom, handle);
 824         return rc;
 825 }
 826
 827 static int mdd_lfsck_namespace_update(const struct lu_env *env,
 828                                       struct lfsck_component *com,
 829                                       const struct lu_fid *fid,
 830                                       __u8 flags, bool force)
 831 {
 832         struct mdd_device *mdd    = mdd_lfsck2mdd(com->lc_lfsck);
 833         struct lu_fid     *key    = &mdd_env_info(env)->mti_fid;
 834         struct thandle    *handle;
 835         struct dt_object *obj     = com->lc_obj;
 836         int               rc;
 837         bool              exist   = false;
 838         __u8              tf;
 839         ENTRY;
 840
 841         rc = mdd_lfsck_namespace_lookup(env, com, fid, &tf);
 842         if (rc != 0 && rc != -ENOENT)
 843                 RETURN(rc);
 844
 845         if (rc == 0) {
 846                 if (!force || flags == tf)
 847                         RETURN(0);
 848
 849                 exist = true;
 850                 handle = dt_trans_create(env, mdd->mdd_bottom);
 851                 if (IS_ERR(handle))
 852                         RETURN(PTR_ERR(handle));
 853
 854                 rc = dt_declare_delete(env, obj, (const struct dt_key *)fid,
 855                                        handle);
 856                 if (rc != 0)
 857                         GOTO(out, rc);
 858         } else {
 859                 handle = dt_trans_create(env, mdd->mdd_bottom);
 860                 if (IS_ERR(handle))
 861                         RETURN(PTR_ERR(handle));
 862         }
 863
 864         rc = dt_declare_insert(env, obj, (const struct dt_rec *)&flags,
 865                                (const struct dt_key *)fid, handle);
 866         if (rc != 0)
 867                 GOTO(out, rc);
 868
 869         rc = dt_trans_start_local(env, mdd->mdd_bottom, handle);
 870         if (rc != 0)
 871                 GOTO(out, rc);
 872
 873         fid_cpu_to_be(key, fid);
 874         if (exist) {
 875                 rc = dt_delete(env, obj, (const struct dt_key *)key, handle,
 876                                BYPASS_CAPA);
 877                 if (rc != 0) {
 878                         CERROR("%s: fail to insert "DFID", rc = %d\n",
 879                                mdd_lfsck2name(com->lc_lfsck), PFID(fid), rc);
 880                         GOTO(out, rc);
 881                 }
 882         }
 883
 884         rc = dt_insert(env, obj, (const struct dt_rec *)&flags,
 885                        (const struct dt_key *)key, handle, BYPASS_CAPA, 1);
 886
 887         GOTO(out, rc);
 888
 889 out:
 890         dt_trans_stop(env, mdd->mdd_bottom, handle);
 891         return rc;
 892 }
 893
 894 /**
 895  * \retval +ve  repaired
 896  * \retval 0    no need to repair
 897  * \retval -ve  error cases
 898  */
 899 static int mdd_lfsck_namespace_double_scan_one(const struct lu_env *env,
 900                                                struct lfsck_component *com,
 901                                                struct mdd_object *child,
 902                                                __u8 flags)
 903 {
 904         struct mdd_thread_info  *info     = mdd_env_info(env);
 905         struct lu_attr          *la       = &info->mti_la;
 906         struct lu_name          *cname    = &info->mti_name;
 907         struct lu_fid           *pfid     = &info->mti_fid;
 908         struct lu_fid           *cfid     = &info->mti_fid2;
 909         struct md_lfsck         *lfsck    = com->lc_lfsck;
 910         struct mdd_device       *mdd      = mdd_lfsck2mdd(lfsck);
 911         struct lfsck_bookmark   *bk       = &lfsck->ml_bookmark_ram;
 912         struct lfsck_namespace  *ns       =
 913                                 (struct lfsck_namespace *)com->lc_file_ram;
 914         struct linkea_data       ldata    = { 0 };
 915         struct thandle          *handle   = NULL;
 916         bool                     locked   = false;
 917         bool                     update   = false;
 918         int                      count;
 919         int                      rc;
 920         ENTRY;
 921
 922         if (com->lc_journal) {
 923
 924 again:
 925                 LASSERT(!locked);
 926
 927                 com->lc_journal = 1;
 928                 handle = mdd_trans_create(env, mdd);
 929                 if (IS_ERR(handle))
 930                         RETURN(rc = PTR_ERR(handle));
 931
 932                 rc = mdd_declare_links_add(env, child, handle, NULL);
 933                 if (rc != 0)
 934                         GOTO(stop, rc);
 935
 936                 rc = mdd_trans_start(env, mdd, handle);
 937                 if (rc != 0)
 938                         GOTO(stop, rc);
 939
 940                 mdd_write_lock(env, child, MOR_TGT_CHILD);
 941                 locked = true;
 942         }
 943
 944         if (unlikely(mdd_is_dead_obj(child)))
 945                 GOTO(stop, rc = 0);
 946
 947         rc = mdd_links_read(env, child, &ldata);
 948         if (rc != 0) {
 949                 if ((bk->lb_param & LPF_DRYRUN) &&
 950                     (rc == -EINVAL || rc == -ENODATA))
 951                         rc = 1;
 952
 953                 GOTO(stop, rc);
 954         }
 955
 956         rc = mdd_la_get(env, child, la, BYPASS_CAPA);
 957         if (rc != 0)
 958                 GOTO(stop, rc);
 959
 960         ldata.ld_lee = LINKEA_FIRST_ENTRY(ldata);
 961         count = ldata.ld_leh->leh_reccount;
 962         while (count-- > 0) {
 963                 struct mdd_object *parent = NULL;
 964                 struct dt_object *dir;
 965
 966                 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, cname,
 967                                     pfid);
 968                 if (!fid_is_sane(pfid))
 969                         goto shrink;
 970
 971                 parent = mdd_object_find(env, mdd, pfid);
 972                 if (parent == NULL)
 973                         goto shrink;
 974                 else if (IS_ERR(parent))
 975                         GOTO(stop, rc = PTR_ERR(parent));
 976
 977                 if (!mdd_object_exists(parent))
 978                         goto shrink;
 979
 980                 /* XXX: need more processing for remote object in the future. */
 981                 if (mdd_object_remote(parent)) {
 982                         mdd_object_put(env, parent);
 983                         ldata.ld_lee = LINKEA_NEXT_ENTRY(ldata);
 984                         continue;
 985                 }
 986
 987                 dir = mdd_object_child(parent);
 988                 if (unlikely(!dt_try_as_dir(env, dir)))
 989                         goto shrink;
 990
 991                 /* To guarantee the 'name' is terminated with '0'. */
 992                 memcpy(info->mti_key, cname->ln_name, cname->ln_namelen);
 993                 info->mti_key[cname->ln_namelen] = 0;
 994                 cname->ln_name = info->mti_key;
 995                 rc = dt_lookup(env, dir, (struct dt_rec *)cfid,
 996                                (const struct dt_key *)cname->ln_name,
 997                                BYPASS_CAPA);
 998                 if (rc != 0 && rc != -ENOENT) {
 999                         mdd_object_put(env, parent);
1000                         GOTO(stop, rc);
1001                 }
1002
1003                 if (rc == 0) {
1004                         if (lu_fid_eq(cfid, mdo2fid(child))) {
1005                                 mdd_object_put(env, parent);
1006                                 ldata.ld_lee = LINKEA_NEXT_ENTRY(ldata);
1007                                 continue;
1008                         }
1009
1010                         goto shrink;
1011                 }
1012
1013                 if (ldata.ld_leh->leh_reccount > la->la_nlink)
1014                         goto shrink;
1015
1016                 /* XXX: For the case of there is linkea entry, but without name
1017                  *      entry pointing to the object, and the object link count
1018                  *      isn't less than the count of name entries, then add the
1019                  *      name entry back to namespace.
1020                  *
1021                  *      It is out of LFSCK 1.5 scope, will implement it in the
1022                  *      future. Keep the linkEA entry. */
1023                 mdd_object_put(env, parent);
1024                 ldata.ld_lee = LINKEA_NEXT_ENTRY(ldata);
1025                 continue;
1026
1027 shrink:
1028                 if (parent != NULL)
1029                         mdd_object_put(env, parent);
1030                 if (bk->lb_param & LPF_DRYRUN)
1031                         RETURN(1);
1032
1033                 CDEBUG(D_LFSCK, "Remove linkEA: "DFID"[%.*s], "DFID"\n",
1034                        PFID(mdo2fid(child)), cname->ln_namelen, cname->ln_name,
1035                        PFID(pfid));
1036                 linkea_del_buf(&ldata, cname);
1037                 update = true;
1038         }
1039
1040         if (update) {
1041                 if (!com->lc_journal) {
1042                         com->lc_journal = 1;
1043                         goto again;
1044                 }
1045
1046                 rc = mdd_links_write(env, child, &ldata, handle);
1047         }
1048
1049         GOTO(stop, rc);
1050
1051 stop:
1052         if (locked)
1053                 mdd_write_unlock(env, child);
1054
1055         if (handle != NULL)
1056                 mdd_trans_stop(env, mdd, rc, handle);
1057
1058         if (rc == 0 && update) {
1059                 ns->ln_objs_nlink_repaired++;
1060                 rc = 1;
1061         }
1062         return rc;
1063 }
1064
1065 /* namespace APIs */
1066
1067 static int mdd_lfsck_namespace_reset(const struct lu_env *env,
1068                                      struct lfsck_component *com, bool init)
1069 {
1070         struct mdd_thread_info  *info = mdd_env_info(env);
1071         struct lu_fid           *fid  = &info->mti_fid;
1072         struct lfsck_namespace  *ns   = (struct lfsck_namespace *)com->lc_file_ram;
1073         struct mdd_device       *mdd  = mdd_lfsck2mdd(com->lc_lfsck);
1074         struct md_object        *mdo;
1075         struct dt_object        *dto;
1076         int                      rc;
1077         ENTRY;
1078
1079         down_write(&com->lc_sem);
1080         if (init) {
1081                 memset(ns, 0, sizeof(*ns));
1082         } else {
1083                 __u32 count = ns->ln_success_count;
1084                 __u64 last_time = ns->ln_time_last_complete;
1085
1086                 memset(ns, 0, sizeof(*ns));
1087                 ns->ln_success_count = count;
1088                 ns->ln_time_last_complete = last_time;
1089         }
1090         ns->ln_magic = LFSCK_NAMESPACE_MAGIC;
1091         ns->ln_status = LS_INIT;
1092
1093         rc = mdd_lfsck_namespace_unlink(env, mdd, com);
1094         if (rc != 0)
1095                 GOTO(out, rc);
1096
1097         lu_local_obj_fid(fid, LFSCK_NAMESPACE_OID);
1098         mdo = llo_store_create_index(env, &mdd->mdd_md_dev, mdd->mdd_bottom, "",
1099                                      lfsck_namespace_name, fid,
1100                                      &dt_lfsck_features);
1101         if (IS_ERR(mdo))
1102                 GOTO(out, rc = PTR_ERR(mdo));
1103
1104         lu_object_put(env, &mdo->mo_lu);
1105         dto = dt_store_open(env, mdd->mdd_bottom, "", lfsck_namespace_name, fid);
1106         if (IS_ERR(dto))
1107                 GOTO(out, rc = PTR_ERR(dto));
1108
1109         com->lc_obj = dto;
1110         rc = dto->do_ops->do_index_try(env, dto, &dt_lfsck_features);
1111         if (rc != 0)
1112                 GOTO(out, rc);
1113
1114         rc = mdd_lfsck_namespace_store(env, com, true);
1115
1116         GOTO(out, rc);
1117
1118 out:
1119         up_write(&com->lc_sem);
1120         return rc;
1121 }
1122
1123 static void
1124 mdd_lfsck_namespace_fail(const struct lu_env *env, struct lfsck_component *com,
1125                          bool oit, bool new_checked)
1126 {
1127         struct lfsck_namespace *ns = (struct lfsck_namespace *)com->lc_file_ram;
1128
1129         down_write(&com->lc_sem);
1130         if (new_checked)
1131                 com->lc_new_checked++;
1132         ns->ln_items_failed++;
1133         if (mdd_lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent))
1134                 mdd_lfsck_pos_fill(env, com->lc_lfsck,
1135                                    &ns->ln_pos_first_inconsistent, oit, !oit);
1136         up_write(&com->lc_sem);
1137 }
1138
1139 static int mdd_lfsck_namespace_checkpoint(const struct lu_env *env,
1140                                           struct lfsck_component *com,
1141                                           bool init)
1142 {
1143         struct md_lfsck         *lfsck = com->lc_lfsck;
1144         struct lfsck_namespace  *ns    =
1145                                 (struct lfsck_namespace *)com->lc_file_ram;
1146         int                      rc;
1147
1148         if (com->lc_new_checked == 0 && !init)
1149                 return 0;
1150
1151         down_write(&com->lc_sem);
1152
1153         ns->ln_pos_last_checkpoint = lfsck->ml_pos_current;
1154         if (init) {
1155                 ns->ln_time_last_checkpoint = ns->ln_time_latest_start;
1156                 ns->ln_pos_latest_start = lfsck->ml_pos_current;
1157         } else {
1158                 ns->ln_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
1159                                 HALF_SEC - lfsck->ml_time_last_checkpoint);
1160                 ns->ln_time_last_checkpoint = cfs_time_current_sec();
1161                 ns->ln_items_checked += com->lc_new_checked;
1162                 com->lc_new_checked = 0;
1163         }
1164
1165         rc = mdd_lfsck_namespace_store(env, com, false);
1166
1167         up_write(&com->lc_sem);
1168         return rc;
1169 }
1170
1171 static int mdd_lfsck_namespace_prep(const struct lu_env *env,
1172                                     struct lfsck_component *com)
1173 {
1174         struct md_lfsck         *lfsck  = com->lc_lfsck;
1175         struct lfsck_namespace  *ns     =
1176                                 (struct lfsck_namespace *)com->lc_file_ram;
1177         struct lfsck_position   *pos    = &com->lc_pos_start;
1178
1179         if (ns->ln_status == LS_COMPLETED) {
1180                 int rc;
1181
1182                 rc = mdd_lfsck_namespace_reset(env, com, false);
1183                 if (rc != 0)
1184                         return rc;
1185         }
1186
1187         down_write(&com->lc_sem);
1188
1189         ns->ln_time_latest_start = cfs_time_current_sec();
1190
1191         spin_lock(&lfsck->ml_lock);
1192         if (ns->ln_flags & LF_SCANNED_ONCE) {
1193                 if (!lfsck->ml_drop_dryrun ||
1194                     mdd_lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent)) {
1195                         ns->ln_status = LS_SCANNING_PHASE2;
1196                         cfs_list_del_init(&com->lc_link);
1197                         cfs_list_add_tail(&com->lc_link,
1198                                           &lfsck->ml_list_double_scan);
1199                         if (!cfs_list_empty(&com->lc_link_dir))
1200                                 cfs_list_del_init(&com->lc_link_dir);
1201                         mdd_lfsck_pos_set_zero(pos);
1202                 } else {
1203                         ns->ln_status = LS_SCANNING_PHASE1;
1204                         ns->ln_run_time_phase1 = 0;
1205                         ns->ln_run_time_phase2 = 0;
1206                         ns->ln_items_checked = 0;
1207                         ns->ln_items_repaired = 0;
1208                         ns->ln_items_failed = 0;
1209                         ns->ln_dirs_checked = 0;
1210                         ns->ln_mlinked_checked = 0;
1211                         ns->ln_objs_checked_phase2 = 0;
1212                         ns->ln_objs_repaired_phase2 = 0;
1213                         ns->ln_objs_failed_phase2 = 0;
1214                         ns->ln_objs_nlink_repaired = 0;
1215                         ns->ln_objs_lost_found = 0;
1216                         fid_zero(&ns->ln_fid_latest_scanned_phase2);
1217                         if (cfs_list_empty(&com->lc_link_dir))
1218                                 cfs_list_add_tail(&com->lc_link_dir,
1219                                                   &lfsck->ml_list_dir);
1220                         *pos = ns->ln_pos_first_inconsistent;
1221                 }
1222         } else {
1223                 ns->ln_status = LS_SCANNING_PHASE1;
1224                 if (cfs_list_empty(&com->lc_link_dir))
1225                         cfs_list_add_tail(&com->lc_link_dir,
1226                                           &lfsck->ml_list_dir);
1227                 if (!lfsck->ml_drop_dryrun ||
1228                     mdd_lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent)) {
1229                         *pos = ns->ln_pos_last_checkpoint;
1230                         pos->lp_oit_cookie++;
1231                         if (!fid_is_zero(&pos->lp_dir_parent)) {
1232                                 if (pos->lp_dir_cookie == MDS_DIR_END_OFF) {
1233                                         fid_zero(&pos->lp_dir_parent);
1234                                 } else {
1235                                         pos->lp_dir_cookie++;
1236                                 }
1237                         }
1238                 } else {
1239                         *pos = ns->ln_pos_first_inconsistent;
1240                 }
1241         }
1242         spin_unlock(&lfsck->ml_lock);
1243
1244         up_write(&com->lc_sem);
1245         return 0;
1246 }
1247
1248 static int mdd_lfsck_namespace_exec_oit(const struct lu_env *env,
1249                                         struct lfsck_component *com,
1250                                         struct mdd_object *obj)
1251 {
1252         down_write(&com->lc_sem);
1253         com->lc_new_checked++;
1254         if (S_ISDIR(mdd_object_type(obj)))
1255                 ((struct lfsck_namespace *)com->lc_file_ram)->ln_dirs_checked++;
1256         up_write(&com->lc_sem);
1257         return 0;
1258 }
1259
1260 static int mdd_declare_lfsck_namespace_exec_dir(const struct lu_env *env,
1261                                                 struct mdd_object *obj,
1262                                                 struct thandle *handle)
1263 {
1264         int rc;
1265
1266         /* For destroying all invalid linkEA entries. */
1267         rc = mdo_declare_xattr_del(env, obj, XATTR_NAME_LINK, handle);
1268         if (rc != 0)
1269                 return rc;
1270
1271         /* For insert new linkEA entry. */
1272         rc = mdd_declare_links_add(env, obj, handle, NULL);
1273         return rc;
1274 }
1275
1276 static int mdd_lfsck_namespace_check_exist(const struct lu_env *env,
1277                                            struct md_lfsck *lfsck,
1278                                            struct mdd_object *obj,
1279                                            const char *name)
1280 {
1281         struct dt_object *dir = lfsck->ml_obj_dir;
1282         struct lu_fid    *fid = &mdd_env_info(env)->mti_fid;
1283         int               rc;
1284         ENTRY;
1285
1286         if (unlikely(mdd_is_dead_obj(obj)))
1287                 RETURN(LFSCK_NAMEENTRY_DEAD);
1288
1289         rc = dt_lookup(env, dir, (struct dt_rec *)fid,
1290                        (const struct dt_key *)name, BYPASS_CAPA);
1291         if (rc == -ENOENT)
1292                 RETURN(LFSCK_NAMEENTRY_REMOVED);
1293
1294         if (rc < 0)
1295                 RETURN(rc);
1296
1297         if (!lu_fid_eq(fid, mdo2fid(obj)))
1298                 RETURN(LFSCK_NAMEENTRY_RECREATED);
1299
1300         RETURN(0);
1301 }
1302
1303 static int mdd_lfsck_namespace_exec_dir(const struct lu_env *env,
1304                                         struct lfsck_component *com,
1305                                         struct mdd_object *obj,
1306                                         struct lu_dirent *ent)
1307 {
1308         struct mdd_thread_info     *info     = mdd_env_info(env);
1309         struct lu_attr             *la       = &info->mti_la;
1310         struct md_lfsck            *lfsck    = com->lc_lfsck;
1311         struct lfsck_bookmark      *bk       = &lfsck->ml_bookmark_ram;
1312         struct lfsck_namespace     *ns       =
1313                                 (struct lfsck_namespace *)com->lc_file_ram;
1314         struct mdd_device          *mdd      = mdd_lfsck2mdd(lfsck);
1315         struct linkea_data          ldata    = { 0 };
1316         const struct lu_fid        *pfid     =
1317                                 lu_object_fid(&lfsck->ml_obj_dir->do_lu);
1318         const struct lu_fid        *cfid     = mdo2fid(obj);
1319         const struct lu_name       *cname;
1320         struct thandle             *handle   = NULL;
1321         bool                        repaired = false;
1322         bool                        locked   = false;
1323         int                         count    = 0;
1324         int                         rc;
1325         ENTRY;
1326
1327         cname = mdd_name_get_const(env, ent->lde_name, ent->lde_namelen);
1328         down_write(&com->lc_sem);
1329         com->lc_new_checked++;
1330
1331         if (ent->lde_attrs & LUDA_UPGRADE) {
1332                 ns->ln_flags |= LF_UPGRADE;
1333                 repaired = true;
1334         } else if (ent->lde_attrs & LUDA_REPAIR) {
1335                 ns->ln_flags |= LF_INCONSISTENT;
1336                 repaired = true;
1337         }
1338
1339         if (ent->lde_name[0] == '.' &&
1340             (ent->lde_namelen == 1 ||
1341              (ent->lde_namelen == 2 && ent->lde_name[1] == '.')))
1342                 GOTO(out, rc = 0);
1343
1344         if (!(bk->lb_param & LPF_DRYRUN) &&
1345             (com->lc_journal || repaired)) {
1346
1347 again:
1348                 LASSERT(!locked);
1349
1350                 com->lc_journal = 1;
1351                 handle = mdd_trans_create(env, mdd);
1352                 if (IS_ERR(handle))
1353                         GOTO(out, rc = PTR_ERR(handle));
1354
1355                 rc = mdd_declare_lfsck_namespace_exec_dir(env, obj, handle);
1356                 if (rc != 0)
1357                         GOTO(stop, rc);
1358
1359                 rc = mdd_trans_start(env, mdd, handle);
1360                 if (rc != 0)
1361                         GOTO(stop, rc);
1362
1363                 mdd_write_lock(env, obj, MOR_TGT_CHILD);
1364                 locked = true;
1365         }
1366
1367         rc = mdd_lfsck_namespace_check_exist(env, lfsck, obj, ent->lde_name);
1368         if (rc != 0)
1369                 GOTO(stop, rc);
1370
1371         rc = mdd_links_read(env, obj, &ldata);
1372         if (rc == 0) {
1373                 count = ldata.ld_leh->leh_reccount;
1374                 rc = linkea_links_find(&ldata, cname, pfid);
1375                 if (rc == 0) {
1376                         /* For dir, if there are more than one linkea entries,
1377                          * then remove all the other redundant linkea entries.*/
1378                         if (unlikely(count > 1 &&
1379                                      S_ISDIR(mdd_object_type(obj))))
1380                                 goto unmatch;
1381
1382                         goto record;
1383                 } else {
1384
1385 unmatch:
1386                         ns->ln_flags |= LF_INCONSISTENT;
1387                         if (bk->lb_param & LPF_DRYRUN) {
1388                                 repaired = true;
1389                                 goto record;
1390                         }
1391
1392                         /*For dir, remove the unmatched linkea entry directly.*/
1393                         if (S_ISDIR(mdd_object_type(obj))) {
1394                                 if (!com->lc_journal)
1395                                         goto again;
1396
1397                                 rc = mdo_xattr_del(env, obj, XATTR_NAME_LINK,
1398                                                    handle, BYPASS_CAPA);
1399                                 if (rc != 0)
1400                                         GOTO(stop, rc);
1401
1402                                 goto nodata;
1403                         } else {
1404                                 goto add;
1405                         }
1406                 }
1407         } else if (unlikely(rc == -EINVAL)) {
1408                 ns->ln_flags |= LF_INCONSISTENT;
1409                 if (bk->lb_param & LPF_DRYRUN) {
1410                         count = 1;
1411                         repaired = true;
1412                         goto record;
1413                 }
1414
1415                 if (!com->lc_journal)
1416                         goto again;
1417
1418                 /* The magic crashed, we are not sure whether there are more
1419                  * corrupt data in the linkea, so remove all linkea entries. */
1420                 rc = mdo_xattr_del(env, obj, XATTR_NAME_LINK, handle,
1421                                    BYPASS_CAPA);
1422                 if (rc != 0)
1423                         GOTO(stop, rc);
1424
1425                 goto nodata;
1426         } else if (rc == -ENODATA) {
1427                 ns->ln_flags |= LF_UPGRADE;
1428                 if (bk->lb_param & LPF_DRYRUN) {
1429                         count = 1;
1430                         repaired = true;
1431                         goto record;
1432                 }
1433
1434 nodata:
1435                 rc = linkea_data_new(&ldata, &mdd_env_info(env)->mti_link_buf);
1436                 if (rc != 0)
1437                         GOTO(stop, rc);
1438
1439 add:
1440                 if (!com->lc_journal)
1441                         goto again;
1442
1443                 rc = linkea_add_buf(&ldata, cname, pfid);
1444                 if (rc != 0)
1445                         GOTO(stop, rc);
1446
1447                 rc = mdd_links_write(env, obj, &ldata, handle);
1448                 if (rc != 0)
1449                         GOTO(stop, rc);
1450
1451                 count = ldata.ld_leh->leh_reccount;
1452                 repaired = true;
1453         } else {
1454                 GOTO(stop, rc);
1455         }
1456
1457 record:
1458         LASSERT(count > 0);
1459
1460         rc = mdd_la_get(env, obj, la, BYPASS_CAPA);
1461         if (rc != 0)
1462                 GOTO(stop, rc);
1463
1464         if ((count == 1) &&
1465             (la->la_nlink == 1 || S_ISDIR(mdd_object_type(obj))))
1466                 /* Usually, it is for single linked object or dir, do nothing.*/
1467                 GOTO(stop, rc);
1468
1469         /* Following modification will be in another transaction.  */
1470         if (handle != NULL) {
1471                 LASSERT(mdd_write_locked(env, obj));
1472
1473                 mdd_write_unlock(env, obj);
1474                 locked = false;
1475
1476                 mdd_trans_stop(env, mdd, 0, handle);
1477                 handle = NULL;
1478         }
1479
1480         ns->ln_mlinked_checked++;
1481         rc = mdd_lfsck_namespace_update(env, com, cfid,
1482                         count != la->la_nlink ? LLF_UNMATCH_NLINKS : 0, false);
1483
1484         GOTO(out, rc);
1485
1486 stop:
1487         if (locked)
1488                 mdd_write_unlock(env, obj);
1489
1490         if (handle != NULL)
1491                 mdd_trans_stop(env, mdd, rc, handle);
1492
1493 out:
1494         if (rc < 0) {
1495                 ns->ln_items_failed++;
1496                 if (mdd_lfsck_pos_is_zero(&ns->ln_pos_first_inconsistent))
1497                         mdd_lfsck_pos_fill(env, lfsck,
1498                                            &ns->ln_pos_first_inconsistent,
1499                                            true, false);
1500                 if (!(bk->lb_param & LPF_FAILOUT))
1501                         rc = 0;
1502         } else {
1503                 if (repaired)
1504                         ns->ln_items_repaired++;
1505                 else
1506                         com->lc_journal = 0;
1507                 rc = 0;
1508         }
1509         up_write(&com->lc_sem);
1510         return rc;
1511 }
1512
1513 static int mdd_lfsck_namespace_post(const struct lu_env *env,
1514                                     struct lfsck_component *com,
1515                                     int result)
1516 {
1517         struct md_lfsck         *lfsck = com->lc_lfsck;
1518         struct lfsck_namespace  *ns    =
1519                                 (struct lfsck_namespace *)com->lc_file_ram;
1520         int                      rc;
1521
1522         down_write(&com->lc_sem);
1523
1524         spin_lock(&lfsck->ml_lock);
1525         if (result > 0) {
1526                 ns->ln_status = LS_SCANNING_PHASE2;
1527                 ns->ln_flags |= LF_SCANNED_ONCE;
1528                 ns->ln_flags &= ~LF_UPGRADE;
1529                 cfs_list_del_init(&com->lc_link);
1530                 cfs_list_del_init(&com->lc_link_dir);
1531                 cfs_list_add_tail(&com->lc_link, &lfsck->ml_list_double_scan);
1532         } else if (result == 0) {
1533                 if (lfsck->ml_paused) {
1534                         ns->ln_status = LS_PAUSED;
1535                 } else {
1536                         ns->ln_status = LS_STOPPED;
1537                         cfs_list_del_init(&com->lc_link);
1538                         cfs_list_del_init(&com->lc_link_dir);
1539                         cfs_list_add_tail(&com->lc_link, &lfsck->ml_list_idle);
1540                 }
1541         } else {
1542                 ns->ln_status = LS_FAILED;
1543                 cfs_list_del_init(&com->lc_link);
1544                 cfs_list_del_init(&com->lc_link_dir);
1545                 cfs_list_add_tail(&com->lc_link, &lfsck->ml_list_idle);
1546         }
1547         spin_unlock(&lfsck->ml_lock);
1548
1549         ns->ln_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
1550                                 HALF_SEC - lfsck->ml_time_last_checkpoint);
1551         ns->ln_time_last_checkpoint = cfs_time_current_sec();
1552         ns->ln_items_checked += com->lc_new_checked;
1553         com->lc_new_checked = 0;
1554
1555         rc = mdd_lfsck_namespace_store(env, com, false);
1556
1557         up_write(&com->lc_sem);
1558         return rc;
1559 }
1560
1561 static int
1562 mdd_lfsck_namespace_dump(const struct lu_env *env, struct lfsck_component *com,
1563                          char *buf, int len)
1564 {
1565         struct md_lfsck         *lfsck = com->lc_lfsck;
1566         struct lfsck_bookmark   *bk    = &lfsck->ml_bookmark_ram;
1567         struct lfsck_namespace  *ns    =
1568                                 (struct lfsck_namespace *)com->lc_file_ram;
1569         int                      save  = len;
1570         int                      ret   = -ENOSPC;
1571         int                      rc;
1572
1573         down_read(&com->lc_sem);
1574         rc = snprintf(buf, len,
1575                       "name: lfsck_namespace\n"
1576                       "magic: 0x%x\n"
1577                       "version: %d\n"
1578                       "status: %s\n",
1579                       ns->ln_magic,
1580                       bk->lb_version,
1581                       lfsck_status_names[ns->ln_status]);
1582         if (rc <= 0)
1583                 goto out;
1584
1585         buf += rc;
1586         len -= rc;
1587         rc = lfsck_bits_dump(&buf, &len, ns->ln_flags, lfsck_flags_names,
1588                              "flags");
1589         if (rc < 0)
1590                 goto out;
1591
1592         rc = lfsck_bits_dump(&buf, &len, bk->lb_param, lfsck_param_names,
1593                              "param");
1594         if (rc < 0)
1595                 goto out;
1596
1597         rc = lfsck_time_dump(&buf, &len, ns->ln_time_last_complete,
1598                              "time_since_last_completed");
1599         if (rc < 0)
1600                 goto out;
1601
1602         rc = lfsck_time_dump(&buf, &len, ns->ln_time_latest_start,
1603                              "time_since_latest_start");
1604         if (rc < 0)
1605                 goto out;
1606
1607         rc = lfsck_time_dump(&buf, &len, ns->ln_time_last_checkpoint,
1608                              "time_since_last_checkpoint");
1609         if (rc < 0)
1610                 goto out;
1611
1612         rc = lfsck_pos_dump(&buf, &len, &ns->ln_pos_latest_start,
1613                             "latest_start_position");
1614         if (rc < 0)
1615                 goto out;
1616
1617         rc = lfsck_pos_dump(&buf, &len, &ns->ln_pos_last_checkpoint,
1618                             "last_checkpoint_position");
1619         if (rc < 0)
1620                 goto out;
1621
1622         rc = lfsck_pos_dump(&buf, &len, &ns->ln_pos_first_inconsistent,
1623                             "first_failure_position");
1624         if (rc < 0)
1625                 goto out;
1626
1627         if (ns->ln_status == LS_SCANNING_PHASE1) {
1628                 struct lfsck_position pos;
1629                 cfs_duration_t duration = cfs_time_current() -
1630                                           lfsck->ml_time_last_checkpoint;
1631                 __u64 checked = ns->ln_items_checked + com->lc_new_checked;
1632                 __u64 speed = checked;
1633                 __u64 new_checked = com->lc_new_checked * CFS_HZ;
1634                 __u32 rtime = ns->ln_run_time_phase1 +
1635                               cfs_duration_sec(duration + HALF_SEC);
1636
1637                 if (duration != 0)
1638                         do_div(new_checked, duration);
1639                 if (rtime != 0)
1640                         do_div(speed, rtime);
1641                 rc = snprintf(buf, len,
1642                               "checked_phase1: "LPU64"\n"
1643                               "checked_phase2: "LPU64"\n"
1644                               "updated_phase1: "LPU64"\n"
1645                               "updated_phase2: "LPU64"\n"
1646                               "failed_phase1: "LPU64"\n"
1647                               "failed_phase2: "LPU64"\n"
1648                               "dirs: "LPU64"\n"
1649                               "M-linked: "LPU64"\n"
1650                               "nlinks_repaired: "LPU64"\n"
1651                               "lost_found: "LPU64"\n"
1652                               "success_count: %u\n"
1653                               "run_time_phase1: %u seconds\n"
1654                               "run_time_phase2: %u seconds\n"
1655                               "average_speed_phase1: "LPU64" items/sec\n"
1656                               "average_speed_phase2: N/A\n"
1657                               "real-time_speed_phase1: "LPU64" items/sec\n"
1658                               "real-time_speed_phase2: N/A\n",
1659                               checked,
1660                               ns->ln_objs_checked_phase2,
1661                               ns->ln_items_repaired,
1662                               ns->ln_objs_repaired_phase2,
1663                               ns->ln_items_failed,
1664                               ns->ln_objs_failed_phase2,
1665                               ns->ln_dirs_checked,
1666                               ns->ln_mlinked_checked,
1667                               ns->ln_objs_nlink_repaired,
1668                               ns->ln_objs_lost_found,
1669                               ns->ln_success_count,
1670                               rtime,
1671                               ns->ln_run_time_phase2,
1672                               speed,
1673                               new_checked);
1674                 if (rc <= 0)
1675                         goto out;
1676
1677                 buf += rc;
1678                 len -= rc;
1679                 mdd_lfsck_pos_fill(env, lfsck, &pos, true, true);
1680                 rc = lfsck_pos_dump(&buf, &len, &pos, "current_position");
1681                 if (rc <= 0)
1682                         goto out;
1683         } else if (ns->ln_status == LS_SCANNING_PHASE2) {
1684                 cfs_duration_t duration = cfs_time_current() -
1685                                           lfsck->ml_time_last_checkpoint;
1686                 __u64 checked = ns->ln_objs_checked_phase2 +
1687                                 com->lc_new_checked;
1688                 __u64 speed1 = ns->ln_items_checked;
1689                 __u64 speed2 = checked;
1690                 __u64 new_checked = com->lc_new_checked * CFS_HZ;
1691                 __u32 rtime = ns->ln_run_time_phase2 +
1692                               cfs_duration_sec(duration + HALF_SEC);
1693
1694                 if (duration != 0)
1695                         do_div(new_checked, duration);
1696                 if (ns->ln_run_time_phase1 != 0)
1697                         do_div(speed1, ns->ln_run_time_phase1);
1698                 if (rtime != 0)
1699                         do_div(speed2, rtime);
1700                 rc = snprintf(buf, len,
1701                               "checked_phase1: "LPU64"\n"
1702                               "checked_phase2: "LPU64"\n"
1703                               "updated_phase1: "LPU64"\n"
1704                               "updated_phase2: "LPU64"\n"
1705                               "failed_phase1: "LPU64"\n"
1706                               "failed_phase2: "LPU64"\n"
1707                               "dirs: "LPU64"\n"
1708                               "M-linked: "LPU64"\n"
1709                               "nlinks_repaired: "LPU64"\n"
1710                               "lost_found: "LPU64"\n"
1711                               "success_count: %u\n"
1712                               "run_time_phase1: %u seconds\n"
1713                               "run_time_phase2: %u seconds\n"
1714                               "average_speed_phase1: "LPU64" items/sec\n"
1715                               "average_speed_phase2: "LPU64" objs/sec\n"
1716                               "real-time_speed_phase1: N/A\n"
1717                               "real-time_speed_phase2: "LPU64" objs/sec\n"
1718                               "current_position: "DFID"\n",
1719                               ns->ln_items_checked,
1720                               checked,
1721                               ns->ln_items_repaired,
1722                               ns->ln_objs_repaired_phase2,
1723                               ns->ln_items_failed,
1724                               ns->ln_objs_failed_phase2,
1725                               ns->ln_dirs_checked,
1726                               ns->ln_mlinked_checked,
1727                               ns->ln_objs_nlink_repaired,
1728                               ns->ln_objs_lost_found,
1729                               ns->ln_success_count,
1730                               ns->ln_run_time_phase1,
1731                               rtime,
1732                               speed1,
1733                               speed2,
1734                               new_checked,
1735                               PFID(&ns->ln_fid_latest_scanned_phase2));
1736                 if (rc <= 0)
1737                         goto out;
1738
1739                 buf += rc;
1740                 len -= rc;
1741         } else {
1742                 __u64 speed1 = ns->ln_items_checked;
1743                 __u64 speed2 = ns->ln_objs_checked_phase2;
1744
1745                 if (ns->ln_run_time_phase1 != 0)
1746                         do_div(speed1, ns->ln_run_time_phase1);
1747                 if (ns->ln_run_time_phase2 != 0)
1748                         do_div(speed2, ns->ln_run_time_phase2);
1749                 rc = snprintf(buf, len,
1750                               "checked_phase1: "LPU64"\n"
1751                               "checked_phase2: "LPU64"\n"
1752                               "updated_phase1: "LPU64"\n"
1753                               "updated_phase2: "LPU64"\n"
1754                               "failed_phase1: "LPU64"\n"
1755                               "failed_phase2: "LPU64"\n"
1756                               "dirs: "LPU64"\n"
1757                               "M-linked: "LPU64"\n"
1758                               "nlinks_repaired: "LPU64"\n"
1759                               "lost_found: "LPU64"\n"
1760                               "success_count: %u\n"
1761                               "run_time_phase1: %u seconds\n"
1762                               "run_time_phase2: %u seconds\n"
1763                               "average_speed_phase1: "LPU64" items/sec\n"
1764                               "average_speed_phase2: "LPU64" objs/sec\n"
1765                               "real-time_speed_phase1: N/A\n"
1766                               "real-time_speed_phase2: N/A\n"
1767                               "current_position: N/A\n",
1768                               ns->ln_items_checked,
1769                               ns->ln_objs_checked_phase2,
1770                               ns->ln_items_repaired,
1771                               ns->ln_objs_repaired_phase2,
1772                               ns->ln_items_failed,
1773                               ns->ln_objs_failed_phase2,
1774                               ns->ln_dirs_checked,
1775                               ns->ln_mlinked_checked,
1776                               ns->ln_objs_nlink_repaired,
1777                               ns->ln_objs_lost_found,
1778                               ns->ln_success_count,
1779                               ns->ln_run_time_phase1,
1780                               ns->ln_run_time_phase2,
1781                               speed1,
1782                               speed2);
1783                 if (rc <= 0)
1784                         goto out;
1785
1786                 buf += rc;
1787                 len -= rc;
1788         }
1789         ret = save - len;
1790
1791 out:
1792         up_read(&com->lc_sem);
1793         return ret;
1794 }
1795
1796 static int mdd_lfsck_namespace_double_scan(const struct lu_env *env,
1797                                            struct lfsck_component *com)
1798 {
1799         struct md_lfsck         *lfsck  = com->lc_lfsck;
1800         struct ptlrpc_thread    *thread = &lfsck->ml_thread;
1801         struct mdd_device       *mdd    = mdd_lfsck2mdd(lfsck);
1802         struct lfsck_bookmark   *bk     = &lfsck->ml_bookmark_ram;
1803         struct lfsck_namespace  *ns     =
1804                                 (struct lfsck_namespace *)com->lc_file_ram;
1805         struct dt_object        *obj    = com->lc_obj;
1806         const struct dt_it_ops  *iops   = &obj->do_index_ops->dio_it;
1807         struct mdd_object       *target;
1808         struct dt_it            *di;
1809         struct dt_key           *key;
1810         struct lu_fid            fid;
1811         int                      rc;
1812         __u8                     flags;
1813         ENTRY;
1814
1815         lfsck->ml_new_scanned = 0;
1816         lfsck->ml_time_last_checkpoint = cfs_time_current();
1817         lfsck->ml_time_next_checkpoint = lfsck->ml_time_last_checkpoint +
1818                                 cfs_time_seconds(LFSCK_CHECKPOINT_INTERVAL);
1819
1820         di = iops->init(env, obj, 0, BYPASS_CAPA);
1821         if (IS_ERR(di))
1822                 RETURN(PTR_ERR(di));
1823
1824         fid_cpu_to_be(&fid, &ns->ln_fid_latest_scanned_phase2);
1825         rc = iops->get(env, di, (const struct dt_key *)&fid);
1826         if (rc < 0)
1827                 GOTO(fini, rc);
1828
1829         /* Skip the start one, which either has been processed or non-exist. */
1830         rc = iops->next(env, di);
1831         if (rc != 0)
1832                 GOTO(put, rc);
1833
1834         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NO_DOUBLESCAN))
1835                 GOTO(put, rc = 0);
1836
1837         do {
1838                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY3) &&
1839                     cfs_fail_val > 0) {
1840                         struct l_wait_info lwi;
1841
1842                         lwi = LWI_TIMEOUT(cfs_time_seconds(cfs_fail_val),
1843                                           NULL, NULL);
1844                         l_wait_event(thread->t_ctl_waitq,
1845                                      !thread_is_running(thread),
1846                                      &lwi);
1847                 }
1848
1849                 key = iops->key(env, di);
1850                 fid_be_to_cpu(&fid, (const struct lu_fid *)key);
1851                 target = mdd_object_find(env, mdd, &fid);
1852                 down_write(&com->lc_sem);
1853                 if (target == NULL) {
1854                         rc = 0;
1855                         goto checkpoint;
1856                 } else if (IS_ERR(target)) {
1857                         rc = PTR_ERR(target);
1858                         goto checkpoint;
1859                 }
1860
1861                 /* XXX: need more processing for remote object in the future. */
1862                 if (!mdd_object_exists(target) || mdd_object_remote(target))
1863                         goto obj_put;
1864
1865                 rc = iops->rec(env, di, (struct dt_rec *)&flags, 0);
1866                 if (rc == 0)
1867                         rc = mdd_lfsck_namespace_double_scan_one(env, com,
1868                                                                  target, flags);
1869
1870 obj_put:
1871                 mdd_object_put(env, target);
1872
1873 checkpoint:
1874                 lfsck->ml_new_scanned++;
1875                 com->lc_new_checked++;
1876                 ns->ln_fid_latest_scanned_phase2 = fid;
1877                 if (rc > 0)
1878                         ns->ln_objs_repaired_phase2++;
1879                 else if (rc < 0)
1880                         ns->ln_objs_failed_phase2++;
1881                 up_write(&com->lc_sem);
1882
1883                 if ((rc == 0) || ((rc > 0) && !(bk->lb_param & LPF_DRYRUN))) {
1884                         mdd_lfsck_namespace_delete(env, com, &fid);
1885                 } else if (rc < 0) {
1886                         flags |= LLF_REPAIR_FAILED;
1887                         mdd_lfsck_namespace_update(env, com, &fid, flags, true);
1888                 }
1889
1890                 if (rc < 0 && bk->lb_param & LPF_FAILOUT)
1891                         GOTO(put, rc);
1892
1893                 if (likely(cfs_time_beforeq(cfs_time_current(),
1894                                             lfsck->ml_time_next_checkpoint)) ||
1895                     com->lc_new_checked == 0)
1896                         goto speed;
1897
1898                 down_write(&com->lc_sem);
1899                 ns->ln_run_time_phase2 += cfs_duration_sec(cfs_time_current() +
1900                                 HALF_SEC - lfsck->ml_time_last_checkpoint);
1901                 ns->ln_time_last_checkpoint = cfs_time_current_sec();
1902                 ns->ln_objs_checked_phase2 += com->lc_new_checked;
1903                 com->lc_new_checked = 0;
1904                 rc = mdd_lfsck_namespace_store(env, com, false);
1905                 up_write(&com->lc_sem);
1906                 if (rc != 0)
1907                         GOTO(put, rc);
1908
1909                 lfsck->ml_time_last_checkpoint = cfs_time_current();
1910                 lfsck->ml_time_next_checkpoint = lfsck->ml_time_last_checkpoint +
1911                                 cfs_time_seconds(LFSCK_CHECKPOINT_INTERVAL);
1912
1913 speed:
1914                 mdd_lfsck_control_speed(lfsck);
1915                 if (unlikely(!thread_is_running(thread)))
1916                         GOTO(put, rc = 0);
1917
1918                 rc = iops->next(env, di);
1919         } while (rc == 0);
1920
1921         GOTO(put, rc);
1922
1923 put:
1924         iops->put(env, di);
1925
1926 fini:
1927         iops->fini(env, di);
1928         down_write(&com->lc_sem);
1929
1930         ns->ln_run_time_phase2 += cfs_duration_sec(cfs_time_current() +
1931                                 HALF_SEC - lfsck->ml_time_last_checkpoint);
1932         ns->ln_time_last_checkpoint = cfs_time_current_sec();
1933         ns->ln_objs_checked_phase2 += com->lc_new_checked;
1934         com->lc_new_checked = 0;
1935
1936         if (rc > 0) {
1937                 com->lc_journal = 0;
1938                 ns->ln_status = LS_COMPLETED;
1939                 if (!(bk->lb_param & LPF_DRYRUN))
1940                         ns->ln_flags &=
1941                         ~(LF_SCANNED_ONCE | LF_INCONSISTENT | LF_UPGRADE);
1942                 ns->ln_time_last_complete = ns->ln_time_last_checkpoint;
1943                 ns->ln_success_count++;
1944         } else if (rc == 0) {
1945                 if (lfsck->ml_paused)
1946                         ns->ln_status = LS_PAUSED;
1947                 else
1948                         ns->ln_status = LS_STOPPED;
1949         } else {
1950                 ns->ln_status = LS_FAILED;
1951         }
1952
1953         if (ns->ln_status != LS_PAUSED) {
1954                 spin_lock(&lfsck->ml_lock);
1955                 cfs_list_del_init(&com->lc_link);
1956                 cfs_list_add_tail(&com->lc_link, &lfsck->ml_list_idle);
1957                 spin_unlock(&lfsck->ml_lock);
1958         }
1959
1960         rc = mdd_lfsck_namespace_store(env, com, false);
1961
1962         up_write(&com->lc_sem);
1963         return rc;
1964 }
1965
1966 static struct lfsck_operations mdd_lfsck_namespace_ops = {
1967         .lfsck_reset            = mdd_lfsck_namespace_reset,
1968         .lfsck_fail             = mdd_lfsck_namespace_fail,
1969         .lfsck_checkpoint       = mdd_lfsck_namespace_checkpoint,
1970         .lfsck_prep             = mdd_lfsck_namespace_prep,
1971         .lfsck_exec_oit         = mdd_lfsck_namespace_exec_oit,
1972         .lfsck_exec_dir         = mdd_lfsck_namespace_exec_dir,
1973         .lfsck_post             = mdd_lfsck_namespace_post,
1974         .lfsck_dump             = mdd_lfsck_namespace_dump,
1975         .lfsck_double_scan      = mdd_lfsck_namespace_double_scan,
1976 };
1977
1978 /* LFSCK component setup/cleanup functions */
1979
1980 static int mdd_lfsck_namespace_setup(const struct lu_env *env,
1981                                      struct md_lfsck *lfsck)
1982 {
1983         struct mdd_device      *mdd = mdd_lfsck2mdd(lfsck);
1984         struct lfsck_component *com;
1985         struct lfsck_namespace *ns;
1986         struct dt_object       *obj;
1987         int                     rc;
1988         ENTRY;
1989
1990         OBD_ALLOC_PTR(com);
1991         if (com == NULL)
1992                 RETURN(-ENOMEM);
1993
1994         CFS_INIT_LIST_HEAD(&com->lc_link);
1995         CFS_INIT_LIST_HEAD(&com->lc_link_dir);
1996         init_rwsem(&com->lc_sem);
1997         atomic_set(&com->lc_ref, 1);
1998         com->lc_lfsck = lfsck;
1999         com->lc_type = LT_NAMESPACE;
2000         com->lc_ops = &mdd_lfsck_namespace_ops;
2001         com->lc_file_size = sizeof(struct lfsck_namespace);
2002         OBD_ALLOC(com->lc_file_ram, com->lc_file_size);
2003         if (com->lc_file_ram == NULL)
2004                 GOTO(out, rc = -ENOMEM);
2005
2006         OBD_ALLOC(com->lc_file_disk, com->lc_file_size);
2007         if (com->lc_file_disk == NULL)
2008                 GOTO(out, rc = -ENOMEM);
2009
2010         obj = dt_store_open(env, mdd->mdd_bottom, "", lfsck_namespace_name,
2011                             &mdd_env_info(env)->mti_fid);
2012         if (IS_ERR(obj))
2013                 GOTO(out, rc = PTR_ERR(obj));
2014
2015         com->lc_obj = obj;
2016         rc = obj->do_ops->do_index_try(env, obj, &dt_lfsck_features);
2017         if (rc != 0)
2018                 GOTO(out, rc);
2019
2020         rc = mdd_lfsck_namespace_load(env, com);
2021         if (rc > 0)
2022                 rc = mdd_lfsck_namespace_reset(env, com, true);
2023         else if (rc == -ENODATA)
2024                 rc = mdd_lfsck_namespace_init(env, com);
2025         if (rc != 0)
2026                 GOTO(out, rc);
2027
2028         ns = (struct lfsck_namespace *)com->lc_file_ram;
2029         switch (ns->ln_status) {
2030         case LS_INIT:
2031         case LS_COMPLETED:
2032         case LS_FAILED:
2033         case LS_STOPPED:
2034                 cfs_list_add_tail(&com->lc_link, &lfsck->ml_list_idle);
2035                 break;
2036         default:
2037                 CERROR("%s: unknown status: %u\n",
2038                        mdd_lfsck2name(lfsck), ns->ln_status);
2039                 /* fall through */
2040         case LS_SCANNING_PHASE1:
2041         case LS_SCANNING_PHASE2:
2042                 /* No need to store the status to disk right now.
2043                  * If the system crashed before the status stored,
2044                  * it will be loaded back when next time. */
2045                 ns->ln_status = LS_CRASHED;
2046                 /* fall through */
2047         case LS_PAUSED:
2048         case LS_CRASHED:
2049                 cfs_list_add_tail(&com->lc_link, &lfsck->ml_list_scan);
2050                 cfs_list_add_tail(&com->lc_link_dir, &lfsck->ml_list_dir);
2051                 break;
2052         }
2053
2054         GOTO(out, rc = 0);
2055
2056 out:
2057         if (rc != 0)
2058                 mdd_lfsck_component_cleanup(env, com);
2059         return rc;
2060 }
2061
2062 /* helper functions for framework */
2063
2064 static int object_is_client_visible(const struct lu_env *env,
2065                                     struct mdd_device *mdd,
2066                                     struct mdd_object *obj)
2067 {
2068         struct lu_fid *fid   = &mdd_env_info(env)->mti_fid;
2069         int            depth = 0;
2070         int            rc;
2071
2072         LASSERT(S_ISDIR(mdd_object_type(obj)));
2073
2074         while (1) {
2075                 if (mdd_is_root(mdd, mdo2fid(obj))) {
2076                         if (depth > 0)
2077                                 mdd_object_put(env, obj);
2078                         return 1;
2079                 }
2080
2081                 mdd_read_lock(env, obj, MOR_TGT_CHILD);
2082                 if (unlikely(mdd_is_dead_obj(obj))) {
2083                         mdd_read_unlock(env, obj);
2084                         if (depth > 0)
2085                                 mdd_object_put(env, obj);
2086                         return 0;
2087                 }
2088
2089                 rc = dt_xattr_get(env, mdd_object_child(obj),
2090                                   mdd_buf_get(env, NULL, 0), XATTR_NAME_LINK,
2091                                   BYPASS_CAPA);
2092                 mdd_read_unlock(env, obj);
2093                 if (rc >= 0) {
2094                         if (depth > 0)
2095                                 mdd_object_put(env, obj);
2096                         return 1;
2097                 }
2098
2099                 if (rc < 0 && rc != -ENODATA) {
2100                         if (depth > 0)
2101                                 mdd_object_put(env, obj);
2102                         return rc;
2103                 }
2104
2105                 rc = mdd_parent_fid(env, obj, fid);
2106                 if (depth > 0)
2107                         mdd_object_put(env, obj);
2108                 if (rc != 0)
2109                         return rc;
2110
2111                 if (unlikely(lu_fid_eq(fid, &mdd->mdd_local_root_fid)))
2112                         return 0;
2113
2114                 obj = mdd_object_find(env, mdd, fid);
2115                 if (obj == NULL)
2116                         return 0;
2117                 else if (IS_ERR(obj))
2118                         return PTR_ERR(obj);
2119
2120                 if (!mdd_object_exists(obj)) {
2121                         mdd_object_put(env, obj);
2122                         return 0;
2123                 }
2124
2125                 /* Currently, only client visible directory can be remote. */
2126                 if (mdd_object_remote(obj)) {
2127                         mdd_object_put(env, obj);
2128                         return 1;
2129                 }
2130
2131                 depth++;
2132         }
2133         return 0;
2134 }
2135
2136 static void mdd_lfsck_unpack_ent(struct lu_dirent *ent)
2137 {
2138         fid_le_to_cpu(&ent->lde_fid, &ent->lde_fid);
2139         ent->lde_hash = le64_to_cpu(ent->lde_hash);
2140         ent->lde_reclen = le16_to_cpu(ent->lde_reclen);
2141         ent->lde_namelen = le16_to_cpu(ent->lde_namelen);
2142         ent->lde_attrs = le32_to_cpu(ent->lde_attrs);
2143
2144         /* Make sure the name is terminated with '0'.
2145          * The data (type) after ent::lde_name maybe
2146          * broken, but we do not care. */
2147         ent->lde_name[ent->lde_namelen] = 0;
2148 }
2149
2150 /* LFSCK wrap functions */
2151
2152 static void mdd_lfsck_fail(const struct lu_env *env, struct md_lfsck *lfsck,
2153                            bool oit, bool new_checked)
2154 {
2155         struct lfsck_component *com;
2156
2157         cfs_list_for_each_entry(com, &lfsck->ml_list_scan, lc_link) {
2158                 com->lc_ops->lfsck_fail(env, com, oit, new_checked);
2159         }
2160 }
2161
2162 static int mdd_lfsck_checkpoint(const struct lu_env *env,
2163                                 struct md_lfsck *lfsck, bool oit)
2164 {
2165         struct lfsck_component *com;
2166         int                     rc;
2167
2168         if (likely(cfs_time_beforeq(cfs_time_current(),
2169                                     lfsck->ml_time_next_checkpoint)))
2170                 return 0;
2171
2172         mdd_lfsck_pos_fill(env, lfsck, &lfsck->ml_pos_current, oit, !oit);
2173         cfs_list_for_each_entry(com, &lfsck->ml_list_scan, lc_link) {
2174                 rc = com->lc_ops->lfsck_checkpoint(env, com, false);
2175                 if (rc != 0)
2176                         return rc;;
2177         }
2178
2179         lfsck->ml_time_last_checkpoint = cfs_time_current();
2180         lfsck->ml_time_next_checkpoint = lfsck->ml_time_last_checkpoint +
2181                                 cfs_time_seconds(LFSCK_CHECKPOINT_INTERVAL);
2182         return 0;
2183 }
2184
2185 static int mdd_lfsck_prep(struct lu_env *env, struct md_lfsck *lfsck)
2186 {
2187         struct mdd_device      *mdd     = mdd_lfsck2mdd(lfsck);
2188         struct mdd_object      *obj     = NULL;
2189         struct dt_object       *dt_obj;
2190         struct lfsck_component *com;
2191         struct lfsck_component *next;
2192         struct lfsck_position  *pos     = NULL;
2193         const struct dt_it_ops *iops    =
2194                                 &lfsck->ml_obj_oit->do_index_ops->dio_it;
2195         struct dt_it           *di;
2196         int                     rc;
2197         ENTRY;
2198
2199         LASSERT(lfsck->ml_obj_dir == NULL);
2200         LASSERT(lfsck->ml_di_dir == NULL);
2201
2202         cfs_list_for_each_entry_safe(com, next, &lfsck->ml_list_scan, lc_link) {
2203                 com->lc_new_checked = 0;
2204                 if (lfsck->ml_bookmark_ram.lb_param & LPF_DRYRUN)
2205                         com->lc_journal = 0;
2206
2207                 rc = com->lc_ops->lfsck_prep(env, com);
2208                 if (rc != 0)
2209                         RETURN(rc);
2210
2211                 if ((pos == NULL) ||
2212                     (!mdd_lfsck_pos_is_zero(&com->lc_pos_start) &&
2213                      mdd_lfsck_pos_is_eq(pos, &com->lc_pos_start) > 0))
2214                         pos = &com->lc_pos_start;
2215         }
2216
2217         /* Init otable-based iterator. */
2218         if (pos == NULL) {
2219                 rc = iops->load(env, lfsck->ml_di_oit, 0);
2220                 if (rc > 0) {
2221                         lfsck->ml_oit_over = 1;
2222                         rc = 0;
2223                 }
2224
2225                 GOTO(out, rc);
2226         }
2227
2228         rc = iops->load(env, lfsck->ml_di_oit, pos->lp_oit_cookie);
2229         if (rc < 0)
2230                 GOTO(out, rc);
2231         else if (rc > 0)
2232                 lfsck->ml_oit_over = 1;
2233
2234         if (fid_is_zero(&pos->lp_dir_parent))
2235                 GOTO(out, rc = 0);
2236
2237         /* Find the directory for namespace-based traverse. */
2238         obj = mdd_object_find(env, mdd, &pos->lp_dir_parent);
2239         if (obj == NULL)
2240                 GOTO(out, rc = 0);
2241         else if (IS_ERR(obj))
2242                 RETURN(PTR_ERR(obj));
2243
2244         /* XXX: need more processing for remote object in the future. */
2245         if (!mdd_object_exists(obj) || mdd_object_remote(obj) ||
2246             unlikely(!S_ISDIR(mdd_object_type(obj))))
2247                 GOTO(out, rc = 0);
2248
2249         if (unlikely(mdd_is_dead_obj(obj)))
2250                 GOTO(out, rc = 0);
2251
2252         dt_obj = mdd_object_child(obj);
2253         if (unlikely(!dt_try_as_dir(env, dt_obj)))
2254                 GOTO(out, rc = -ENOTDIR);
2255
2256         /* Init the namespace-based directory traverse. */
2257         iops = &dt_obj->do_index_ops->dio_it;
2258         di = iops->init(env, dt_obj, lfsck->ml_args_dir, BYPASS_CAPA);
2259         if (IS_ERR(di))
2260                 GOTO(out, rc = PTR_ERR(di));
2261
2262         rc = iops->load(env, di, pos->lp_dir_cookie);
2263         if (rc == 0)
2264                 rc = iops->next(env, di);
2265         else if (rc > 0)
2266                 rc = 0;
2267
2268         if (rc != 0) {
2269                 iops->put(env, di);
2270                 iops->fini(env, di);
2271                 GOTO(out, rc);
2272         }
2273
2274         lfsck->ml_obj_dir = dt_obj;
2275         spin_lock(&lfsck->ml_lock);
2276         lfsck->ml_di_dir = di;
2277         spin_unlock(&lfsck->ml_lock);
2278         obj = NULL;
2279
2280         GOTO(out, rc = 0);
2281
2282 out:
2283         if (obj != NULL)
2284                 mdd_object_put(env, obj);
2285
2286         if (rc != 0)
2287                 return (rc > 0 ? 0 : rc);
2288
2289         mdd_lfsck_pos_fill(env, lfsck, &lfsck->ml_pos_current, false, false);
2290         cfs_list_for_each_entry(com, &lfsck->ml_list_scan, lc_link) {
2291                 rc = com->lc_ops->lfsck_checkpoint(env, com, true);
2292                 if (rc != 0)
2293                         break;
2294         }
2295
2296         lfsck->ml_time_last_checkpoint = cfs_time_current();
2297         lfsck->ml_time_next_checkpoint = lfsck->ml_time_last_checkpoint +
2298                                 cfs_time_seconds(LFSCK_CHECKPOINT_INTERVAL);
2299         return rc;
2300 }
2301
2302 static int mdd_lfsck_exec_oit(const struct lu_env *env, struct md_lfsck *lfsck,
2303                               struct mdd_object *obj)
2304 {
2305         struct lfsck_component *com;
2306         struct dt_object       *dt_obj;
2307         const struct dt_it_ops *iops;
2308         struct dt_it           *di;
2309         int                     rc;
2310         ENTRY;
2311
2312         LASSERT(lfsck->ml_obj_dir == NULL);
2313
2314         cfs_list_for_each_entry(com, &lfsck->ml_list_scan, lc_link) {
2315                 rc = com->lc_ops->lfsck_exec_oit(env, com, obj);
2316                 if (rc != 0)
2317                         RETURN(rc);
2318         }
2319
2320         if (!S_ISDIR(mdd_object_type(obj)) ||
2321             cfs_list_empty(&lfsck->ml_list_dir))
2322                RETURN(0);
2323
2324         rc = object_is_client_visible(env, mdd_lfsck2mdd(lfsck), obj);
2325         if (rc <= 0)
2326                 GOTO(out, rc);
2327
2328         if (unlikely(mdd_is_dead_obj(obj)))
2329                 GOTO(out, rc = 0);
2330
2331         dt_obj = mdd_object_child(obj);
2332         if (unlikely(!dt_try_as_dir(env, dt_obj)))
2333                 GOTO(out, rc = -ENOTDIR);
2334
2335         iops = &dt_obj->do_index_ops->dio_it;
2336         di = iops->init(env, dt_obj, lfsck->ml_args_dir, BYPASS_CAPA);
2337         if (IS_ERR(di))
2338                 GOTO(out, rc = PTR_ERR(di));
2339
2340         rc = iops->load(env, di, 0);
2341         if (rc == 0)
2342                 rc = iops->next(env, di);
2343         else if (rc > 0)
2344                 rc = 0;
2345
2346         if (rc != 0) {
2347                 iops->put(env, di);
2348                 iops->fini(env, di);
2349                 GOTO(out, rc);
2350         }
2351
2352         mdd_object_get(obj);
2353         lfsck->ml_obj_dir = dt_obj;
2354         spin_lock(&lfsck->ml_lock);
2355         lfsck->ml_di_dir = di;
2356         spin_unlock(&lfsck->ml_lock);
2357
2358         GOTO(out, rc = 0);
2359
2360 out:
2361         if (rc < 0)
2362                 mdd_lfsck_fail(env, lfsck, false, false);
2363         return (rc > 0 ? 0 : rc);
2364 }
2365
2366 static int mdd_lfsck_exec_dir(const struct lu_env *env, struct md_lfsck *lfsck,
2367                               struct mdd_object *obj, struct lu_dirent *ent)
2368 {
2369         struct lfsck_component *com;
2370         int                     rc;
2371
2372         cfs_list_for_each_entry(com, &lfsck->ml_list_scan, lc_link) {
2373                 rc = com->lc_ops->lfsck_exec_dir(env, com, obj, ent);
2374                 if (rc != 0)
2375                         return rc;
2376         }
2377         return 0;
2378 }
2379
2380 static int mdd_lfsck_post(const struct lu_env *env, struct md_lfsck *lfsck,
2381                           int result)
2382 {
2383         struct lfsck_component *com;
2384         struct lfsck_component *next;
2385         int                     rc;
2386
2387         mdd_lfsck_pos_fill(env, lfsck, &lfsck->ml_pos_current, true, true);
2388         cfs_list_for_each_entry_safe(com, next, &lfsck->ml_list_scan, lc_link) {
2389                 rc = com->lc_ops->lfsck_post(env, com, result);
2390                 if (rc != 0)
2391                         return rc;
2392         }
2393
2394         lfsck->ml_time_last_checkpoint = cfs_time_current();
2395         lfsck->ml_time_next_checkpoint = lfsck->ml_time_last_checkpoint +
2396                                 cfs_time_seconds(LFSCK_CHECKPOINT_INTERVAL);
2397         return result;
2398 }
2399
2400 static int mdd_lfsck_double_scan(const struct lu_env *env,
2401                                  struct md_lfsck *lfsck)
2402 {
2403         struct lfsck_component *com;
2404         struct lfsck_component *next;
2405         int                     rc;
2406
2407         cfs_list_for_each_entry_safe(com, next, &lfsck->ml_list_double_scan,
2408                                      lc_link) {
2409                 if (lfsck->ml_bookmark_ram.lb_param & LPF_DRYRUN)
2410                         com->lc_journal = 0;
2411
2412                 rc = com->lc_ops->lfsck_double_scan(env, com);
2413                 if (rc != 0)
2414                         return rc;
2415         }
2416         return 0;
2417 }
2418
2419 /* LFSCK engines */
2420
2421 static int mdd_lfsck_dir_engine(const struct lu_env *env,
2422                                 struct md_lfsck *lfsck)
2423 {
2424         struct mdd_thread_info  *info   = mdd_env_info(env);
2425         struct mdd_device       *mdd    = mdd_lfsck2mdd(lfsck);
2426         const struct dt_it_ops  *iops   =
2427                         &lfsck->ml_obj_dir->do_index_ops->dio_it;
2428         struct dt_it            *di     = lfsck->ml_di_dir;
2429         struct lu_dirent        *ent    = &info->mti_ent;
2430         struct lu_fid           *fid    = &info->mti_fid;
2431         struct lfsck_bookmark   *bk     = &lfsck->ml_bookmark_ram;
2432         struct ptlrpc_thread    *thread = &lfsck->ml_thread;
2433         int                      rc;
2434         ENTRY;
2435
2436         do {
2437                 struct mdd_object *child;
2438
2439                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY2) &&
2440                     cfs_fail_val > 0) {
2441                         struct l_wait_info lwi;
2442
2443                         lwi = LWI_TIMEOUT(cfs_time_seconds(cfs_fail_val),
2444                                           NULL, NULL);
2445                         l_wait_event(thread->t_ctl_waitq,
2446                                      !thread_is_running(thread),
2447                                      &lwi);
2448                 }
2449
2450                 lfsck->ml_new_scanned++;
2451                 rc = iops->rec(env, di, (struct dt_rec *)ent,
2452                                lfsck->ml_args_dir);
2453                 if (rc != 0) {
2454                         mdd_lfsck_fail(env, lfsck, false, true);
2455                         if (bk->lb_param & LPF_FAILOUT)
2456                                 RETURN(rc);
2457                         else
2458                                 goto checkpoint;
2459                 }
2460
2461                 mdd_lfsck_unpack_ent(ent);
2462                 if (ent->lde_attrs & LUDA_IGNORE)
2463                         goto checkpoint;
2464
2465                 *fid = ent->lde_fid;
2466                 child = mdd_object_find(env, mdd, fid);
2467                 if (child == NULL) {
2468                         goto checkpoint;
2469                 } else if (IS_ERR(child)) {
2470                         mdd_lfsck_fail(env, lfsck, false, true);
2471                         if (bk->lb_param & LPF_FAILOUT)
2472                                 RETURN(PTR_ERR(child));
2473                         else
2474                                 goto checkpoint;
2475                 }
2476
2477                 /* XXX: need more processing for remote object in the future. */
2478                 if (mdd_object_exists(child) && !mdd_object_remote(child))
2479                         rc = mdd_lfsck_exec_dir(env, lfsck, child, ent);
2480                 mdd_object_put(env, child);
2481                 if (rc != 0 && bk->lb_param & LPF_FAILOUT)
2482                         RETURN(rc);
2483
2484 checkpoint:
2485                 rc = mdd_lfsck_checkpoint(env, lfsck, false);
2486                 if (rc != 0 && bk->lb_param & LPF_FAILOUT)
2487                         RETURN(rc);
2488
2489                 /* Rate control. */
2490                 mdd_lfsck_control_speed(lfsck);
2491                 if (unlikely(!thread_is_running(thread)))
2492                         RETURN(0);
2493
2494                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_FATAL2)) {
2495                         spin_lock(&lfsck->ml_lock);
2496                         thread_set_flags(thread, SVC_STOPPING);
2497                         spin_unlock(&lfsck->ml_lock);
2498                         RETURN(-EINVAL);
2499                 }
2500
2501                 rc = iops->next(env, di);
2502         } while (rc == 0);
2503
2504         if (rc > 0 && !lfsck->ml_oit_over)
2505                 mdd_lfsck_close_dir(env, lfsck);
2506
2507         RETURN(rc);
2508 }
2509
2510 static int mdd_lfsck_oit_engine(const struct lu_env *env,
2511                                 struct md_lfsck *lfsck)
2512 {
2513         struct mdd_thread_info  *info   = mdd_env_info(env);
2514         struct mdd_device       *mdd    = mdd_lfsck2mdd(lfsck);
2515         const struct dt_it_ops  *iops   =
2516                                 &lfsck->ml_obj_oit->do_index_ops->dio_it;
2517         struct dt_it            *di     = lfsck->ml_di_oit;
2518         struct lu_fid           *fid    = &info->mti_fid;
2519         struct lfsck_bookmark   *bk     = &lfsck->ml_bookmark_ram;
2520         struct ptlrpc_thread    *thread = &lfsck->ml_thread;
2521         int                      rc;
2522         ENTRY;
2523
2524         do {
2525                 struct mdd_object *target;
2526
2527                 if (lfsck->ml_di_dir != NULL) {
2528                         rc = mdd_lfsck_dir_engine(env, lfsck);
2529                         if (rc <= 0)
2530                                 RETURN(rc);
2531                 }
2532
2533                 if (unlikely(lfsck->ml_oit_over))
2534                         RETURN(1);
2535
2536                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY1) &&
2537                     cfs_fail_val > 0) {
2538                         struct l_wait_info lwi;
2539
2540                         lwi = LWI_TIMEOUT(cfs_time_seconds(cfs_fail_val),
2541                                           NULL, NULL);
2542                         l_wait_event(thread->t_ctl_waitq,
2543                                      !thread_is_running(thread),
2544                                      &lwi);
2545                 }
2546
2547                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CRASH))
2548                         RETURN(0);
2549
2550                 lfsck->ml_new_scanned++;
2551                 rc = iops->rec(env, di, (struct dt_rec *)fid, 0);
2552                 if (rc != 0) {
2553                         mdd_lfsck_fail(env, lfsck, true, true);
2554                         if (bk->lb_param & LPF_FAILOUT)
2555                                 RETURN(rc);
2556                         else
2557                                 goto checkpoint;
2558                 }
2559
2560                 target = mdd_object_find(env, mdd, fid);
2561                 if (target == NULL) {
2562                         goto checkpoint;
2563                 } else if (IS_ERR(target)) {
2564                         mdd_lfsck_fail(env, lfsck, true, true);
2565                         if (bk->lb_param & LPF_FAILOUT)
2566                                 RETURN(PTR_ERR(target));
2567                         else
2568                                 goto checkpoint;
2569                 }
2570
2571                 /* XXX: In fact, low layer otable-based iteration should not
2572                  *      return agent object. But before LU-2646 resolved, we
2573                  *      need more processing for agent object. */
2574                 if (mdd_object_exists(target) && !mdd_object_remote(target))
2575                         rc = mdd_lfsck_exec_oit(env, lfsck, target);
2576                 mdd_object_put(env, target);
2577                 if (rc != 0 && bk->lb_param & LPF_FAILOUT)
2578                         RETURN(rc);
2579
2580 checkpoint:
2581                 rc = mdd_lfsck_checkpoint(env, lfsck, true);
2582                 if (rc != 0 && bk->lb_param & LPF_FAILOUT)
2583                         RETURN(rc);
2584
2585                 /* Rate control. */
2586                 mdd_lfsck_control_speed(lfsck);
2587
2588                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_FATAL1)) {
2589                         spin_lock(&lfsck->ml_lock);
2590                         thread_set_flags(thread, SVC_STOPPING);
2591                         spin_unlock(&lfsck->ml_lock);
2592                         RETURN(-EINVAL);
2593                 }
2594
2595                 rc = iops->next(env, di);
2596                 if (rc > 0)
2597                         lfsck->ml_oit_over = 1;
2598
2599                 if (unlikely(!thread_is_running(thread)))
2600                         RETURN(0);
2601         } while (rc == 0 || lfsck->ml_di_dir != NULL);
2602
2603         RETURN(rc);
2604 }
2605
2606 static int mdd_lfsck_main(void *args)
2607 {
2608         struct lu_env            env;
2609         struct md_lfsck         *lfsck    = (struct md_lfsck *)args;
2610         struct ptlrpc_thread    *thread   = &lfsck->ml_thread;
2611         struct dt_object        *oit_obj  = lfsck->ml_obj_oit;
2612         const struct dt_it_ops  *oit_iops = &oit_obj->do_index_ops->dio_it;
2613         struct dt_it            *oit_di;
2614         int                      rc;
2615         ENTRY;
2616
2617         cfs_daemonize("lfsck");
2618         rc = lu_env_init(&env, LCT_MD_THREAD | LCT_DT_THREAD);
2619         if (rc != 0) {
2620                 CERROR("%s: LFSCK, fail to init env, rc = %d\n",
2621                        mdd_lfsck2name(lfsck), rc);
2622                 GOTO(noenv, rc);
2623         }
2624
2625         oit_di = oit_iops->init(&env, oit_obj, lfsck->ml_args_oit, BYPASS_CAPA);
2626         if (IS_ERR(oit_di)) {
2627                 rc = PTR_ERR(oit_di);
2628                 CERROR("%s: LFSCK, fail to init iteration, rc = %d\n",
2629                        mdd_lfsck2name(lfsck), rc);
2630                 GOTO(fini_env, rc);
2631         }
2632
2633         spin_lock(&lfsck->ml_lock);
2634         lfsck->ml_di_oit = oit_di;
2635         spin_unlock(&lfsck->ml_lock);
2636         rc = mdd_lfsck_prep(&env, lfsck);
2637         if (rc != 0)
2638                 GOTO(fini_oit, rc);
2639
2640         CDEBUG(D_LFSCK, "LFSCK entry: oit_flags = 0x%x, dir_flags = 0x%x, "
2641                "oit_cookie = "LPU64", dir_cookie = "LPU64", parent = "DFID
2642                ", pid = %d\n", lfsck->ml_args_oit, lfsck->ml_args_dir,
2643                lfsck->ml_pos_current.lp_oit_cookie,
2644                lfsck->ml_pos_current.lp_dir_cookie,
2645                PFID(&lfsck->ml_pos_current.lp_dir_parent),
2646                cfs_curproc_pid());
2647
2648         spin_lock(&lfsck->ml_lock);
2649         thread_set_flags(thread, SVC_RUNNING);
2650         spin_unlock(&lfsck->ml_lock);
2651         cfs_waitq_broadcast(&thread->t_ctl_waitq);
2652
2653         if (!cfs_list_empty(&lfsck->ml_list_scan) ||
2654             cfs_list_empty(&lfsck->ml_list_double_scan))
2655                 rc = mdd_lfsck_oit_engine(&env, lfsck);
2656         else
2657                 rc = 1;
2658
2659         CDEBUG(D_LFSCK, "LFSCK exit: oit_flags = 0x%x, dir_flags = 0x%x, "
2660                "oit_cookie = "LPU64", dir_cookie = "LPU64", parent = "DFID
2661                ", pid = %d, rc = %d\n", lfsck->ml_args_oit, lfsck->ml_args_dir,
2662                lfsck->ml_pos_current.lp_oit_cookie,
2663                lfsck->ml_pos_current.lp_dir_cookie,
2664                PFID(&lfsck->ml_pos_current.lp_dir_parent),
2665                cfs_curproc_pid(), rc);
2666
2667         if (lfsck->ml_paused && cfs_list_empty(&lfsck->ml_list_scan))
2668                 oit_iops->put(&env, oit_di);
2669
2670         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CRASH))
2671                 rc = mdd_lfsck_post(&env, lfsck, rc);
2672         if (lfsck->ml_di_dir != NULL)
2673                 mdd_lfsck_close_dir(&env, lfsck);
2674
2675 fini_oit:
2676         spin_lock(&lfsck->ml_lock);
2677         lfsck->ml_di_oit = NULL;
2678         spin_unlock(&lfsck->ml_lock);
2679
2680         oit_iops->fini(&env, oit_di);
2681         if (rc == 1) {
2682                 if (!cfs_list_empty(&lfsck->ml_list_double_scan))
2683                         rc = mdd_lfsck_double_scan(&env, lfsck);
2684                 else
2685                         rc = 0;
2686         }
2687
2688         /* XXX: Purge the pinned objects in the future. */
2689
2690 fini_env:
2691         lu_env_fini(&env);
2692
2693 noenv:
2694         spin_lock(&lfsck->ml_lock);
2695         thread_set_flags(thread, SVC_STOPPED);
2696         cfs_waitq_broadcast(&thread->t_ctl_waitq);
2697         spin_unlock(&lfsck->ml_lock);
2698         return rc;
2699 }
2700
2701 /* external interfaces */
2702
2703 int mdd_lfsck_set_speed(const struct lu_env *env, struct md_lfsck *lfsck,
2704                         __u32 limit)
2705 {
2706         int rc;
2707
2708         mutex_lock(&lfsck->ml_mutex);
2709         __mdd_lfsck_set_speed(lfsck, limit);
2710         rc = mdd_lfsck_bookmark_store(env, lfsck);
2711         mutex_unlock(&lfsck->ml_mutex);
2712         return rc;
2713 }
2714
2715 int mdd_lfsck_dump(const struct lu_env *env, struct md_lfsck *lfsck,
2716                    __u16 type, char *buf, int len)
2717 {
2718         struct lfsck_component *com;
2719         int                     rc;
2720
2721         if (!lfsck->ml_initialized)
2722                 return -ENODEV;
2723
2724         com = mdd_lfsck_component_find(lfsck, type);
2725         if (com == NULL)
2726                 return -ENOTSUPP;
2727
2728         rc = com->lc_ops->lfsck_dump(env, com, buf, len);
2729         mdd_lfsck_component_put(env, com);
2730         return rc;
2731 }
2732
2733 int mdd_lfsck_start(const struct lu_env *env, struct md_lfsck *lfsck,
2734                     struct lfsck_start *start)
2735 {
2736         struct lfsck_bookmark  *bk     = &lfsck->ml_bookmark_ram;
2737         struct ptlrpc_thread   *thread = &lfsck->ml_thread;
2738         struct lfsck_component *com;
2739         struct l_wait_info      lwi    = { 0 };
2740         bool                    dirty  = false;
2741         int                     rc     = 0;
2742         __u16                   valid  = 0;
2743         __u16                   flags  = 0;
2744         ENTRY;
2745
2746         if (lfsck->ml_obj_oit == NULL)
2747                 RETURN(-ENOTSUPP);
2748
2749         /* start == NULL means auto trigger paused LFSCK. */
2750         if ((start == NULL) &&
2751             (cfs_list_empty(&lfsck->ml_list_scan) ||
2752              OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NO_AUTO)))
2753                 RETURN(0);
2754
2755         mutex_lock(&lfsck->ml_mutex);
2756         spin_lock(&lfsck->ml_lock);
2757         if (!thread_is_init(thread) && !thread_is_stopped(thread)) {
2758                 spin_unlock(&lfsck->ml_lock);
2759                 mutex_unlock(&lfsck->ml_mutex);
2760                 RETURN(-EALREADY);
2761         }
2762
2763         spin_unlock(&lfsck->ml_lock);
2764
2765         lfsck->ml_paused = 0;
2766         lfsck->ml_oit_over = 0;
2767         lfsck->ml_drop_dryrun = 0;
2768         lfsck->ml_new_scanned = 0;
2769
2770         /* For auto trigger. */
2771         if (start == NULL)
2772                 goto trigger;
2773
2774         start->ls_version = bk->lb_version;
2775         if (start->ls_valid & LSV_SPEED_LIMIT) {
2776                 __mdd_lfsck_set_speed(lfsck, start->ls_speed_limit);
2777                 dirty = true;
2778         }
2779
2780         if (start->ls_valid & LSV_ERROR_HANDLE) {
2781                 valid |= DOIV_ERROR_HANDLE;
2782                 if (start->ls_flags & LPF_FAILOUT)
2783                         flags |= DOIF_FAILOUT;
2784
2785                 if ((start->ls_flags & LPF_FAILOUT) &&
2786                     !(bk->lb_param & LPF_FAILOUT)) {
2787                         bk->lb_param |= LPF_FAILOUT;
2788                         dirty = true;
2789                 } else if (!(start->ls_flags & LPF_FAILOUT) &&
2790                            (bk->lb_param & LPF_FAILOUT)) {
2791                         bk->lb_param &= ~LPF_FAILOUT;
2792                         dirty = true;
2793                 }
2794         }
2795
2796         if (start->ls_valid & LSV_DRYRUN) {
2797                 if ((start->ls_flags & LPF_DRYRUN) &&
2798                     !(bk->lb_param & LPF_DRYRUN)) {
2799                         bk->lb_param |= LPF_DRYRUN;
2800                         dirty = true;
2801                 } else if (!(start->ls_flags & LPF_DRYRUN) &&
2802                            (bk->lb_param & LPF_DRYRUN)) {
2803                         bk->lb_param &= ~LPF_DRYRUN;
2804                         lfsck->ml_drop_dryrun = 1;
2805                         dirty = true;
2806                 }
2807         }
2808
2809         if (dirty) {
2810                 rc = mdd_lfsck_bookmark_store(env, lfsck);
2811                 if (rc != 0)
2812                         GOTO(out, rc);
2813         }
2814
2815         if (start->ls_flags & LPF_RESET)
2816                 flags |= DOIF_RESET;
2817
2818         if (start->ls_active != 0) {
2819                 struct lfsck_component *next;
2820                 __u16 type = 1;
2821
2822                 if (start->ls_active == LFSCK_TYPES_ALL)
2823                         start->ls_active = LFSCK_TYPES_SUPPORTED;
2824
2825                 if (start->ls_active & ~LFSCK_TYPES_SUPPORTED) {
2826                         start->ls_active &= ~LFSCK_TYPES_SUPPORTED;
2827                         GOTO(out, rc = -ENOTSUPP);
2828                 }
2829
2830                 cfs_list_for_each_entry_safe(com, next,
2831                                              &lfsck->ml_list_scan, lc_link) {
2832                         if (!(com->lc_type & start->ls_active)) {
2833                                 rc = com->lc_ops->lfsck_post(env, com, 0);
2834                                 if (rc != 0)
2835                                         GOTO(out, rc);
2836                         }
2837                 }
2838
2839                 while (start->ls_active != 0) {
2840                         if (type & start->ls_active) {
2841                                 com = __mdd_lfsck_component_find(lfsck, type,
2842                                                         &lfsck->ml_list_idle);
2843                                 if (com != NULL) {
2844                                         /* The component status will be updated
2845                                          * when its prep() is called later by
2846                                          * the LFSCK main engine. */
2847                                         cfs_list_del_init(&com->lc_link);
2848                                         cfs_list_add_tail(&com->lc_link,
2849                                                           &lfsck->ml_list_scan);
2850                                 }
2851                                 start->ls_active &= ~type;
2852                         }
2853                         type <<= 1;
2854                 }
2855         }
2856
2857         cfs_list_for_each_entry(com, &lfsck->ml_list_scan, lc_link) {
2858                 start->ls_active |= com->lc_type;
2859                 if (flags & DOIF_RESET) {
2860                         rc = com->lc_ops->lfsck_reset(env, com, false);
2861                         if (rc != 0)
2862                                 GOTO(out, rc);
2863                 }
2864         }
2865
2866 trigger:
2867         lfsck->ml_args_dir = LUDA_64BITHASH | LUDA_VERIFY;
2868         if (bk->lb_param & LPF_DRYRUN)
2869                 lfsck->ml_args_dir |= LUDA_VERIFY_DRYRUN;
2870
2871         if (bk->lb_param & LPF_FAILOUT) {
2872                 valid |= DOIV_ERROR_HANDLE;
2873                 flags |= DOIF_FAILOUT;
2874         }
2875
2876         if (!cfs_list_empty(&lfsck->ml_list_scan))
2877                 flags |= DOIF_OUTUSED;
2878
2879         lfsck->ml_args_oit = (flags << DT_OTABLE_IT_FLAGS_SHIFT) | valid;
2880         thread_set_flags(thread, 0);
2881         rc = cfs_create_thread(mdd_lfsck_main, lfsck, 0);
2882         if (rc < 0)
2883                 CERROR("%s: cannot start LFSCK thread, rc = %d\n",
2884                        mdd_lfsck2name(lfsck), rc);
2885         else
2886                 l_wait_event(thread->t_ctl_waitq,
2887                              thread_is_running(thread) ||
2888                              thread_is_stopped(thread),
2889                              &lwi);
2890
2891         GOTO(out, rc = 0);
2892
2893 out:
2894         mutex_unlock(&lfsck->ml_mutex);
2895         return (rc < 0 ? rc : 0);
2896 }
2897
2898 int mdd_lfsck_stop(const struct lu_env *env, struct md_lfsck *lfsck,
2899                    bool pause)
2900 {
2901         struct ptlrpc_thread *thread = &lfsck->ml_thread;
2902         struct l_wait_info    lwi    = { 0 };
2903         ENTRY;
2904
2905         if (!lfsck->ml_initialized)
2906                 RETURN(0);
2907
2908         mutex_lock(&lfsck->ml_mutex);
2909         spin_lock(&lfsck->ml_lock);
2910         if (thread_is_init(thread) || thread_is_stopped(thread)) {
2911                 spin_unlock(&lfsck->ml_lock);
2912                 mutex_unlock(&lfsck->ml_mutex);
2913                 RETURN(-EALREADY);
2914         }
2915
2916         if (pause)
2917                 lfsck->ml_paused = 1;
2918         thread_set_flags(thread, SVC_STOPPING);
2919         /* The LFSCK thread may be sleeping on low layer wait queue,
2920          * wake it up. */
2921         if (likely(lfsck->ml_di_oit != NULL))
2922                 lfsck->ml_obj_oit->do_index_ops->dio_it.put(env,
2923                                                             lfsck->ml_di_oit);
2924         spin_unlock(&lfsck->ml_lock);
2925
2926         cfs_waitq_broadcast(&thread->t_ctl_waitq);
2927         l_wait_event(thread->t_ctl_waitq,
2928                      thread_is_stopped(thread),
2929                      &lwi);
2930         mutex_unlock(&lfsck->ml_mutex);
2931
2932         RETURN(0);
2933 }
2934
2935 static const struct lu_fid lfsck_it_fid = { .f_seq = FID_SEQ_LOCAL_FILE,
2936                                             .f_oid = OTABLE_IT_OID,
2937                                             .f_ver = 0 };
2938
2939 int mdd_lfsck_setup(const struct lu_env *env, struct mdd_device *mdd)
2940 {
2941         struct md_lfsck  *lfsck = &mdd->mdd_lfsck;
2942         struct dt_object *obj;
2943         int               rc;
2944         ENTRY;
2945
2946         LASSERT(!lfsck->ml_initialized);
2947
2948         lfsck->ml_initialized = 1;
2949         mutex_init(&lfsck->ml_mutex);
2950         spin_lock_init(&lfsck->ml_lock);
2951         CFS_INIT_LIST_HEAD(&lfsck->ml_list_scan);
2952         CFS_INIT_LIST_HEAD(&lfsck->ml_list_dir);
2953         CFS_INIT_LIST_HEAD(&lfsck->ml_list_double_scan);
2954         CFS_INIT_LIST_HEAD(&lfsck->ml_list_idle);
2955         cfs_waitq_init(&lfsck->ml_thread.t_ctl_waitq);
2956
2957         obj = dt_locate(env, mdd->mdd_bottom, &lfsck_it_fid);
2958         if (IS_ERR(obj))
2959                 RETURN(PTR_ERR(obj));
2960
2961         lfsck->ml_obj_oit = obj;
2962         rc = obj->do_ops->do_index_try(env, obj, &dt_otable_features);
2963         if (rc != 0) {
2964                 if (rc == -ENOTSUPP)
2965                         rc = 0;
2966
2967                 RETURN(rc);
2968         }
2969
2970         obj = dt_store_open(env, mdd->mdd_bottom, "", lfsck_bookmark_name,
2971                             &mdd_env_info(env)->mti_fid);
2972         if (IS_ERR(obj))
2973                 RETURN(PTR_ERR(obj));
2974
2975         lfsck->ml_bookmark_obj = obj;
2976         rc = mdd_lfsck_bookmark_load(env, lfsck);
2977         if (rc == -ENODATA)
2978                 rc = mdd_lfsck_bookmark_init(env, lfsck);
2979         if (rc != 0)
2980                 RETURN(rc);
2981
2982         rc = mdd_lfsck_namespace_setup(env, lfsck);
2983         /* XXX: LFSCK components initialization to be added here. */
2984
2985         RETURN(rc);
2986 }
2987
2988 void mdd_lfsck_cleanup(const struct lu_env *env, struct mdd_device *mdd)
2989 {
2990         struct md_lfsck         *lfsck  = &mdd->mdd_lfsck;
2991         struct ptlrpc_thread    *thread = &lfsck->ml_thread;
2992         struct lfsck_component  *com;
2993
2994         if (!lfsck->ml_initialized)
2995                 return;
2996
2997         LASSERT(thread_is_init(thread) || thread_is_stopped(thread));
2998
2999         if (lfsck->ml_obj_oit != NULL) {
3000                 lu_object_put(env, &lfsck->ml_obj_oit->do_lu);
3001                 lfsck->ml_obj_oit = NULL;
3002         }
3003
3004         LASSERT(lfsck->ml_obj_dir == NULL);
3005
3006         if (lfsck->ml_bookmark_obj != NULL) {
3007                 lu_object_put(env, &lfsck->ml_bookmark_obj->do_lu);
3008                 lfsck->ml_bookmark_obj = NULL;
3009         }
3010
3011         while (!cfs_list_empty(&lfsck->ml_list_scan)) {
3012                 com = cfs_list_entry(lfsck->ml_list_scan.next,
3013                                      struct lfsck_component,
3014                                      lc_link);
3015                 mdd_lfsck_component_cleanup(env, com);
3016         }
3017
3018         LASSERT(cfs_list_empty(&lfsck->ml_list_dir));
3019
3020         while (!cfs_list_empty(&lfsck->ml_list_double_scan)) {
3021                 com = cfs_list_entry(lfsck->ml_list_double_scan.next,
3022                                      struct lfsck_component,
3023                                      lc_link);
3024                 mdd_lfsck_component_cleanup(env, com);
3025         }
3026
3027         while (!cfs_list_empty(&lfsck->ml_list_idle)) {
3028                 com = cfs_list_entry(lfsck->ml_list_idle.next,
3029                                      struct lfsck_component,
3030                                      lc_link);
3031                 mdd_lfsck_component_cleanup(env, com);
3032         }
3033 }