lustre/lfsck/lfsck_layout.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) 2014, 2017, Intel Corporation.
  24  */
  25 /*
  26  * lustre/lfsck/lfsck_layout.c
  27  *
  28  * Author: Fan, Yong <fan.yong@intel.com>
  29  */
  30
  31 #ifndef EXPORT_SYMTAB
  32 # define EXPORT_SYMTAB
  33 #endif
  34 #define DEBUG_SUBSYSTEM S_LFSCK
  35
  36 #include <linux/bitops.h>
  37 #include <linux/rbtree.h>
  38
  39 #include <lu_object.h>
  40 #include <dt_object.h>
  41 #include <lustre_fid.h>
  42 #include <lustre_lib.h>
  43 #include <lustre_net.h>
  44 #include <md_object.h>
  45 #include <obd_class.h>
  46
  47 #include "lfsck_internal.h"
  48
  49 #define LFSCK_LAYOUT_MAGIC_V1           0xB173AE14
  50 #define LFSCK_LAYOUT_MAGIC_V2           0xB1734D76
  51 #define LFSCK_LAYOUT_MAGIC_V3           0xB17371B9
  52 #define LFSCK_LAYOUT_MAGIC_V4           0xB1732FED
  53
  54 #define LFSCK_LAYOUT_MAGIC              LFSCK_LAYOUT_MAGIC_V4
  55
  56 struct lfsck_layout_seq {
  57         struct list_head         lls_list;
  58         __u64                    lls_seq;
  59         __u64                    lls_lastid;
  60         __u64                    lls_lastid_known;
  61         struct dt_object        *lls_lastid_obj;
  62         unsigned int             lls_dirty:1;
  63 };
  64
  65 struct lfsck_layout_slave_target {
  66         /* link into lfsck_layout_slave_data::llsd_master_list. */
  67         struct list_head        llst_list;
  68         /* The position for next record in the rbtree for iteration. */
  69         struct lu_fid           llst_fid;
  70         /* Dummy hash for iteration against the rbtree. */
  71         __u64                   llst_hash;
  72         __u64                   llst_gen;
  73         atomic_t                llst_ref;
  74         __u32                   llst_index;
  75         /* How many times we have failed to get the master status. */
  76         int                     llst_failures;
  77 };
  78
  79 struct lfsck_layout_slave_data {
  80         /* list for lfsck_layout_seq */
  81         struct list_head         llsd_seq_list;
  82
  83         /* list for the masters involve layout verification. */
  84         struct list_head         llsd_master_list;
  85         spinlock_t               llsd_lock;
  86         __u64                    llsd_touch_gen;
  87         struct dt_object        *llsd_rb_obj;
  88         struct rb_root           llsd_rb_root;
  89         struct rw_semaphore      llsd_rb_rwsem;
  90         unsigned int             llsd_rbtree_valid:1;
  91 };
  92
  93 struct lfsck_layout_slave_async_args {
  94         struct obd_export                *llsaa_exp;
  95         struct lfsck_component           *llsaa_com;
  96         struct lfsck_layout_slave_target *llsaa_llst;
  97 };
  98
  99 static inline bool lfsck_comp_extent_aligned(__u64 border, __u32 size)
 100 {
 101         return (border & (size - 1)) == 0;
 102 }
 103
 104 static inline void
 105 lfsck_layout_llst_put(struct lfsck_layout_slave_target *llst)
 106 {
 107         if (atomic_dec_and_test(&llst->llst_ref)) {
 108                 LASSERT(list_empty(&llst->llst_list));
 109
 110                 OBD_FREE_PTR(llst);
 111         }
 112 }
 113
 114 static inline int
 115 lfsck_layout_llst_add(struct lfsck_layout_slave_data *llsd, __u32 index)
 116 {
 117         struct lfsck_layout_slave_target *llst;
 118         struct lfsck_layout_slave_target *tmp;
 119         int                               rc   = 0;
 120
 121         OBD_ALLOC_PTR(llst);
 122         if (llst == NULL)
 123                 return -ENOMEM;
 124
 125         INIT_LIST_HEAD(&llst->llst_list);
 126         llst->llst_gen = 0;
 127         llst->llst_index = index;
 128         atomic_set(&llst->llst_ref, 1);
 129
 130         spin_lock(&llsd->llsd_lock);
 131         list_for_each_entry(tmp, &llsd->llsd_master_list, llst_list) {
 132                 if (tmp->llst_index == index) {
 133                         rc = -EALREADY;
 134                         break;
 135                 }
 136         }
 137         if (rc == 0)
 138                 list_add_tail(&llst->llst_list, &llsd->llsd_master_list);
 139         spin_unlock(&llsd->llsd_lock);
 140
 141         if (rc != 0)
 142                 OBD_FREE_PTR(llst);
 143
 144         return rc;
 145 }
 146
 147 static inline void
 148 lfsck_layout_llst_del(struct lfsck_layout_slave_data *llsd,
 149                       struct lfsck_layout_slave_target *llst)
 150 {
 151         bool del = false;
 152
 153         spin_lock(&llsd->llsd_lock);
 154         if (!list_empty(&llst->llst_list)) {
 155                 list_del_init(&llst->llst_list);
 156                 del = true;
 157         }
 158         spin_unlock(&llsd->llsd_lock);
 159
 160         if (del)
 161                 lfsck_layout_llst_put(llst);
 162 }
 163
 164 static inline struct lfsck_layout_slave_target *
 165 lfsck_layout_llst_find_and_del(struct lfsck_layout_slave_data *llsd,
 166                                __u32 index, bool unlink)
 167 {
 168         struct lfsck_layout_slave_target *llst;
 169
 170         spin_lock(&llsd->llsd_lock);
 171         list_for_each_entry(llst, &llsd->llsd_master_list, llst_list) {
 172                 if (llst->llst_index == index) {
 173                         if (unlink)
 174                                 list_del_init(&llst->llst_list);
 175                         else
 176                                 atomic_inc(&llst->llst_ref);
 177                         spin_unlock(&llsd->llsd_lock);
 178
 179                         return llst;
 180                 }
 181         }
 182         spin_unlock(&llsd->llsd_lock);
 183
 184         return NULL;
 185 }
 186
 187 static struct lfsck_layout_req *
 188 lfsck_layout_assistant_req_init(struct lfsck_assistant_object *lso,
 189                                 struct dt_object *child, __u32 comp_id,
 190                                 __u32 ost_idx, __u32 lov_idx)
 191 {
 192         struct lfsck_layout_req *llr;
 193
 194         OBD_ALLOC_PTR(llr);
 195         if (llr == NULL)
 196                 return ERR_PTR(-ENOMEM);
 197
 198         INIT_LIST_HEAD(&llr->llr_lar.lar_list);
 199         llr->llr_lar.lar_parent = lfsck_assistant_object_get(lso);
 200         llr->llr_child = child;
 201         llr->llr_comp_id = comp_id;
 202         llr->llr_ost_idx = ost_idx;
 203         llr->llr_lov_idx = lov_idx;
 204
 205         return llr;
 206 }
 207
 208 static void lfsck_layout_assistant_req_fini(const struct lu_env *env,
 209                                             struct lfsck_assistant_req *lar)
 210 {
 211         struct lfsck_layout_req *llr =
 212                 container_of(lar, struct lfsck_layout_req, llr_lar);
 213
 214         lfsck_object_put(env, llr->llr_child);
 215         lfsck_assistant_object_put(env, lar->lar_parent);
 216         OBD_FREE_PTR(llr);
 217 }
 218
 219 static int
 220 lfsck_layout_assistant_sync_failures_interpret(const struct lu_env *env,
 221                                                struct ptlrpc_request *req,
 222                                                void *args, int rc)
 223 {
 224         if (rc == 0) {
 225                 struct lfsck_async_interpret_args *laia = args;
 226                 struct lfsck_tgt_desc             *ltd  = laia->laia_ltd;
 227
 228                 ltd->ltd_synced_failures = 1;
 229                 atomic_dec(laia->laia_count);
 230         }
 231
 232         return 0;
 233 }
 234
 235 /**
 236  * Notify remote LFSCK instances about former failures.
 237  *
 238  * The local LFSCK instance has recorded which OSTs have ever failed to respond
 239  * some LFSCK verification requests (maybe because of network issues or the OST
 240  * itself trouble). During the respond gap, the OST may missed some OST-objects
 241  * verification, then the OST cannot know whether related OST-objects have been
 242  * referenced by related MDT-objects or not, then in the second-stage scanning,
 243  * these OST-objects will be regarded as orphan, if the OST-object contains bad
 244  * parent FID for back reference, then it will misguide the LFSCK to make wrong
 245  * fixing for the fake orphan.
 246  *
 247  * To avoid above trouble, when layout LFSCK finishes the first-stage scanning,
 248  * it will scan the bitmap for the ever failed OSTs, and notify them that they
 249  * have ever missed some OST-object verification and should skip the handling
 250  * for orphan OST-objects on all MDTs that are in the layout LFSCK.
 251  *
 252  * \param[in] env       pointer to the thread context
 253  * \param[in] com       pointer to the lfsck component
 254  * \param[in] lr        pointer to the lfsck request
 255  */
 256 static void lfsck_layout_assistant_sync_failures(const struct lu_env *env,
 257                                                  struct lfsck_component *com,
 258                                                  struct lfsck_request *lr)
 259 {
 260         struct lfsck_async_interpret_args *laia  =
 261                                 &lfsck_env_info(env)->lti_laia2;
 262         struct lfsck_assistant_data       *lad   = com->lc_data;
 263         struct lfsck_layout               *lo    = com->lc_file_ram;
 264         struct lfsck_instance             *lfsck = com->lc_lfsck;
 265         struct lfsck_tgt_descs            *ltds  = &lfsck->li_ost_descs;
 266         struct lfsck_tgt_desc             *ltd;
 267         struct ptlrpc_request_set         *set;
 268         atomic_t                           count;
 269         __u32                              idx;
 270         int                                rc    = 0;
 271         ENTRY;
 272
 273         if (!test_bit(LAD_INCOMPLETE, &lad->lad_flags))
 274                 RETURN_EXIT;
 275
 276         /* If the MDT has ever failed to verfiy some OST-objects,
 277          * then sync failures with them firstly. */
 278         lr->lr_flags2 = lo->ll_flags | LF_INCOMPLETE;
 279
 280         atomic_set(&count, 0);
 281         memset(laia, 0, sizeof(*laia));
 282         laia->laia_count = &count;
 283         set = ptlrpc_prep_set();
 284         if (set == NULL)
 285                 GOTO(out, rc = -ENOMEM);
 286
 287         down_read(&ltds->ltd_rw_sem);
 288         cfs_foreach_bit(lad->lad_bitmap, idx) {
 289                 ltd = lfsck_ltd2tgt(ltds, idx);
 290                 if (unlikely(!ltd))
 291                         continue;
 292
 293                 laia->laia_ltd = ltd;
 294                 rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
 295                                 lfsck_layout_assistant_sync_failures_interpret,
 296                                 laia, LFSCK_NOTIFY);
 297                 if (rc != 0) {
 298                         CDEBUG(D_LFSCK, "%s: LFSCK assistant fail to "
 299                                "notify target %x for %s phase1 done: "
 300                                "rc = %d\n", lfsck_lfsck2name(com->lc_lfsck),
 301                                ltd->ltd_index, lad->lad_name, rc);
 302
 303                         break;
 304                 }
 305
 306                 atomic_inc(&count);
 307         }
 308         up_read(&ltds->ltd_rw_sem);
 309
 310         if (rc == 0 && atomic_read(&count) > 0)
 311                 rc = ptlrpc_set_wait(env, set);
 312
 313         ptlrpc_set_destroy(set);
 314
 315         if (rc == 0 && atomic_read(&count) > 0)
 316                 rc = -EINVAL;
 317
 318         GOTO(out, rc);
 319
 320 out:
 321         if (rc != 0)
 322                 /* If failed to sync failures with the OSTs, then have to
 323                  * mark the whole LFSCK as LF_INCOMPLETE to skip the whole
 324                  * subsequent orphan OST-object handling. */
 325                 lo->ll_flags |= LF_INCOMPLETE;
 326
 327         lr->lr_flags2 = lo->ll_flags;
 328 }
 329
 330 static int lfsck_layout_verify_header_v1v3(struct dt_object *obj,
 331                                            struct lov_mds_md_v1 *lmm,
 332                                            __u64 start, __u64 end,
 333                                            __u32 comp_id,
 334                                            bool ext, bool *dom)
 335 {
 336         __u32 magic;
 337         __u32 pattern;
 338         __u32 size;
 339
 340         magic = le32_to_cpu(lmm->lmm_magic);
 341         /* If magic crashed, keep it there. Sometime later, during OST-object
 342          * orphan handling, if some OST-object(s) back-point to it, it can be
 343          * verified and repaired. */
 344         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3) {
 345                 int rc;
 346
 347                 if ((magic & LOV_MAGIC_MASK) == LOV_MAGIC_MAGIC)
 348                         rc = -EOPNOTSUPP;
 349                 else
 350                         rc = -EINVAL;
 351
 352                 CDEBUG(D_LFSCK, "%s LOV EA magic 0x%X for the file "DFID"\n",
 353                        rc == -EINVAL ? "Unknown" : "Unsupported",
 354                        magic, PFID(lfsck_dto2fid(obj)));
 355
 356                 return rc;
 357         }
 358
 359         pattern = le32_to_cpu(lmm->lmm_pattern);
 360         *dom = !!(lov_pattern(pattern) == LOV_PATTERN_MDT);
 361
 362         /* XXX: DoM file verification will be supportted via LU-11081. */
 363         if (lov_pattern(pattern) == LOV_PATTERN_MDT) {
 364 #if 0
 365                 if (start != 0) {
 366                         CDEBUG(D_LFSCK, "The DoM entry for "DFID" is not "
 367                                "the first component in the mirror %x/%llu\n",
 368                                PFID(lfsck_dto2fid(obj)), comp_id, start);
 369
 370                         return -EINVAL;
 371                 }
 372 #endif
 373         } else if (!lov_pattern_supported_normal_comp(lov_pattern(pattern))) {
 374                 CDEBUG(D_LFSCK, "Unsupported LOV EA pattern %u for the file "
 375                        DFID" in the component %x\n",
 376                        pattern, PFID(lfsck_dto2fid(obj)), comp_id);
 377
 378                 return -EOPNOTSUPP;
 379         }
 380
 381         size = le32_to_cpu(lmm->lmm_stripe_size);
 382         if (!ext && end != LUSTRE_EOF && start != end &&
 383             !lfsck_comp_extent_aligned(end, size)){
 384                 CDEBUG(D_LFSCK, "not aligned border in PFL extent range "
 385                        "[%llu - %llu) stripesize %u for the file "DFID
 386                        " at idx %d\n", start, end, size,
 387                        PFID(lfsck_dto2fid(obj)), comp_id);
 388
 389                 return -EINVAL;
 390         }
 391
 392         return 0;
 393 }
 394
 395 static int lfsck_layout_verify_header_foreign(struct dt_object *obj,
 396                                               struct lov_foreign_md *lfm,
 397                                               size_t len)
 398 {
 399         /* magic has been verified already */
 400         __u32 value_len = le32_to_cpu(lfm->lfm_length);
 401         /* type and flags are not checked for instance */
 402
 403         CDEBUG(D_INFO, "foreign LOV EA, magic %x, len %u, type %x, flags %x, for file "DFID"\n",
 404                le32_to_cpu(lfm->lfm_magic), value_len,
 405                le32_to_cpu(lfm->lfm_type), le32_to_cpu(lfm->lfm_flags),
 406                PFID(lfsck_dto2fid(obj)));
 407
 408         if (len != value_len + offsetof(typeof(*lfm), lfm_value))
 409                 CDEBUG(D_LFSCK, "foreign LOV EA internal size %u does not match EA full size %zu for file "DFID"\n",
 410                        value_len, len, PFID(lfsck_dto2fid(obj)));
 411
 412         /* nothing to repair */
 413         return -ENODATA;
 414 }
 415
 416 static int lfsck_layout_verify_header(struct dt_object *obj,
 417                                       struct lov_mds_md_v1 *lmm, size_t len)
 418 {
 419         bool p_dom = false;
 420         int rc = 0;
 421
 422         if (le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_COMP_V1 ||
 423             le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_SEL) {
 424                 struct lov_comp_md_v1 *lcm = (struct lov_comp_md_v1 *)lmm;
 425                 bool p_zero = false;
 426                 int i;
 427                 __u16 count = le16_to_cpu(lcm->lcm_entry_count);
 428
 429                 if (unlikely(count == 0)) {
 430                         CDEBUG(D_LFSCK, "the PFL file "DFID" contains invalid "
 431                                "components count 0\n",
 432                                PFID(lfsck_dto2fid(obj)));
 433
 434                         return -EINVAL;
 435                 }
 436
 437                 for (i = 0; i < count && !rc; i++) {
 438                         struct lov_comp_md_entry_v1 *lcme =
 439                                                 &lcm->lcm_entries[i];
 440                         __u64 start = le64_to_cpu(lcme->lcme_extent.e_start);
 441                         __u64 end = le64_to_cpu(lcme->lcme_extent.e_end);
 442                         __u32 comp_id = le32_to_cpu(lcme->lcme_id);
 443                         bool ext, inited, zero;
 444                         __u32 flags;
 445
 446                         if (unlikely(comp_id == LCME_ID_INVAL ||
 447                                      comp_id > LCME_ID_MAX)) {
 448                                 CDEBUG(D_LFSCK, "found invalid PFL ID %u "
 449                                        "for the file "DFID" at idx %d\n",
 450                                        comp_id, PFID(lfsck_dto2fid(obj)), i);
 451
 452                                 return -EINVAL;
 453                         }
 454
 455                         flags = le32_to_cpu(lcme->lcme_flags);
 456                         ext = flags & LCME_FL_EXTENSION;
 457                         inited = flags & LCME_FL_INIT;
 458                         zero = !!(start == end);
 459
 460                         if ((i == 0) && zero) {
 461                                 CDEBUG(D_LFSCK, "invalid PFL comp %d: [%llu "
 462                                        "- %llu) for "DFID"\n", i, start, end,
 463                                        PFID(lfsck_dto2fid(obj)));
 464                                 return -EINVAL;
 465                         }
 466
 467                         if ((zero && (inited || (i + 1 == count))) ||
 468                             (start > end)) {
 469                                 CDEBUG(D_LFSCK, "invalid PFL comp %d/%d: "
 470                                        "[%llu, %llu) for "DFID", %sinited\n",
 471                                        i, count, start, end,
 472                                        PFID(lfsck_dto2fid(obj)),
 473                                        inited ? "" : "NOT ");
 474                                 return -EINVAL;
 475                         }
 476
 477                         if (!ext && p_zero) {
 478                                 CDEBUG(D_LFSCK, "invalid PFL comp %d: [%llu, "
 479                                        "%llu) for "DFID": NOT extension "
 480                                        "after 0-length component\n", i,
 481                                        start, end, PFID(lfsck_dto2fid(obj)));
 482                                 return -EINVAL;
 483                         }
 484
 485                         if (ext && (inited || p_dom || zero)) {
 486                                 CDEBUG(D_LFSCK, "invalid PFL comp %d: [%llu, "
 487                                        "%llu) for "DFID": %s\n", i,
 488                                        start, end, PFID(lfsck_dto2fid(obj)),
 489                                        inited ? "inited extension" :
 490                                        p_dom ? "extension follows DOM" :
 491                                        zero ? "zero length extension" : "");
 492                                 return -EINVAL;
 493                         }
 494
 495                         rc = lfsck_layout_verify_header_v1v3(obj,
 496                                         (struct lov_mds_md_v1 *)((char *)lmm +
 497                                         le32_to_cpu(lcme->lcme_offset)), start,
 498                                         end, comp_id, ext, &p_dom);
 499
 500                         p_zero = zero;
 501                 }
 502         } else if (le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_FOREIGN) {
 503                 rc = lfsck_layout_verify_header_foreign(obj,
 504                                                 (struct lov_foreign_md *)lmm,
 505                                                 len);
 506         } else {
 507                 rc = lfsck_layout_verify_header_v1v3(obj, lmm, 0, LUSTRE_EOF,
 508                                                      0, false, &p_dom);
 509         }
 510
 511         return rc;
 512 }
 513
 514 static int lfsck_layout_get_lovea(const struct lu_env *env,
 515                                   struct dt_object *obj, struct lu_buf *buf)
 516 {
 517         int rc;
 518         int rc1;
 519
 520 again:
 521         rc = dt_xattr_get(env, obj, buf, XATTR_NAME_LOV);
 522         if (rc == -ERANGE) {
 523                 rc = dt_xattr_get(env, obj, &LU_BUF_NULL, XATTR_NAME_LOV);
 524                 if (rc <= 0)
 525                         return !rc ? -ENODATA : rc;
 526
 527                 lu_buf_realloc(buf, rc);
 528                 if (buf->lb_buf == NULL)
 529                         return -ENOMEM;
 530
 531                 goto again;
 532         }
 533
 534         if (rc <= 0)
 535                 return !rc ? -ENODATA : rc;
 536
 537         if (unlikely(buf->lb_buf == NULL)) {
 538                 lu_buf_alloc(buf, rc);
 539                 if (buf->lb_buf == NULL)
 540                         return -ENOMEM;
 541
 542                 goto again;
 543         }
 544
 545         rc1 = lfsck_layout_verify_header(obj, buf->lb_buf, rc);
 546
 547         return rc1 ? rc1 : rc;
 548 }
 549
 550 #define LFSCK_RBTREE_BITMAP_SIZE        PAGE_SIZE
 551 #define LFSCK_RBTREE_BITMAP_WIDTH       (LFSCK_RBTREE_BITMAP_SIZE << 3)
 552 #define LFSCK_RBTREE_BITMAP_MASK        (LFSCK_RBTREE_BITMAP_WIDTH - 1)
 553
 554 struct lfsck_rbtree_node {
 555         struct rb_node   lrn_node;
 556         __u64            lrn_seq;
 557         __u32            lrn_first_oid;
 558         atomic_t         lrn_known_count;
 559         atomic_t         lrn_accessed_count;
 560         void            *lrn_known_bitmap;
 561         void            *lrn_accessed_bitmap;
 562 };
 563
 564 static inline int lfsck_rbtree_cmp(struct lfsck_rbtree_node *lrn,
 565                                    __u64 seq, __u32 oid)
 566 {
 567         if (seq < lrn->lrn_seq)
 568                 return -1;
 569
 570         if (seq > lrn->lrn_seq)
 571                 return 1;
 572
 573         if (oid < lrn->lrn_first_oid)
 574                 return -1;
 575
 576         if (oid - lrn->lrn_first_oid >= LFSCK_RBTREE_BITMAP_WIDTH)
 577                 return 1;
 578
 579         return 0;
 580 }
 581
 582 /* The caller should hold llsd->llsd_rb_lock. */
 583 static struct lfsck_rbtree_node *
 584 lfsck_rbtree_search(struct lfsck_layout_slave_data *llsd,
 585                     const struct lu_fid *fid, bool *exact)
 586 {
 587         struct rb_node           *node  = llsd->llsd_rb_root.rb_node;
 588         struct rb_node           *prev  = NULL;
 589         struct lfsck_rbtree_node *lrn   = NULL;
 590         int                       rc    = 0;
 591
 592         if (exact != NULL)
 593                 *exact = true;
 594
 595         while (node != NULL) {
 596                 prev = node;
 597                 lrn = rb_entry(node, struct lfsck_rbtree_node, lrn_node);
 598                 rc = lfsck_rbtree_cmp(lrn, fid_seq(fid), fid_oid(fid));
 599                 if (rc < 0)
 600                         node = node->rb_left;
 601                 else if (rc > 0)
 602                         node = node->rb_right;
 603                 else
 604                         return lrn;
 605         }
 606
 607         if (exact == NULL)
 608                 return NULL;
 609
 610         /* If there is no exactly matched one, then to the next valid one. */
 611         *exact = false;
 612
 613         /* The rbtree is empty. */
 614         if (rc == 0)
 615                 return NULL;
 616
 617         if (rc < 0)
 618                 return lrn;
 619
 620         node = rb_next(prev);
 621
 622         /* The end of the rbtree. */
 623         if (node == NULL)
 624                 return NULL;
 625
 626         lrn = rb_entry(node, struct lfsck_rbtree_node, lrn_node);
 627
 628         return lrn;
 629 }
 630
 631 static struct lfsck_rbtree_node *lfsck_rbtree_new(const struct lu_env *env,
 632                                                   const struct lu_fid *fid)
 633 {
 634         struct lfsck_rbtree_node *lrn;
 635
 636         OBD_ALLOC_PTR(lrn);
 637         if (lrn == NULL)
 638                 return ERR_PTR(-ENOMEM);
 639
 640         OBD_ALLOC(lrn->lrn_known_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 641         if (lrn->lrn_known_bitmap == NULL) {
 642                 OBD_FREE_PTR(lrn);
 643
 644                 return ERR_PTR(-ENOMEM);
 645         }
 646
 647         OBD_ALLOC(lrn->lrn_accessed_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 648         if (lrn->lrn_accessed_bitmap == NULL) {
 649                 OBD_FREE(lrn->lrn_known_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 650                 OBD_FREE_PTR(lrn);
 651
 652                 return ERR_PTR(-ENOMEM);
 653         }
 654
 655         RB_CLEAR_NODE(&lrn->lrn_node);
 656         lrn->lrn_seq = fid_seq(fid);
 657         lrn->lrn_first_oid = fid_oid(fid) & ~LFSCK_RBTREE_BITMAP_MASK;
 658         atomic_set(&lrn->lrn_known_count, 0);
 659         atomic_set(&lrn->lrn_accessed_count, 0);
 660
 661         return lrn;
 662 }
 663
 664 static void lfsck_rbtree_free(struct lfsck_rbtree_node *lrn)
 665 {
 666         OBD_FREE(lrn->lrn_accessed_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 667         OBD_FREE(lrn->lrn_known_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 668         OBD_FREE_PTR(lrn);
 669 }
 670
 671 /* The caller should hold lock. */
 672 static struct lfsck_rbtree_node *
 673 lfsck_rbtree_insert(struct lfsck_layout_slave_data *llsd,
 674                     struct lfsck_rbtree_node *lrn)
 675 {
 676         struct rb_node           **pos    = &llsd->llsd_rb_root.rb_node;
 677         struct rb_node            *parent = NULL;
 678         struct lfsck_rbtree_node  *tmp;
 679         int                        rc;
 680
 681         while (*pos != NULL) {
 682                 parent = *pos;
 683                 tmp = rb_entry(parent, struct lfsck_rbtree_node, lrn_node);
 684                 rc = lfsck_rbtree_cmp(tmp, lrn->lrn_seq, lrn->lrn_first_oid);
 685                 if (rc < 0)
 686                         pos = &(*pos)->rb_left;
 687                 else if (rc > 0)
 688                         pos = &(*pos)->rb_right;
 689                 else
 690                         return tmp;
 691         }
 692
 693         rb_link_node(&lrn->lrn_node, parent, pos);
 694         rb_insert_color(&lrn->lrn_node, &llsd->llsd_rb_root);
 695
 696         return lrn;
 697 }
 698
 699 static const struct dt_index_operations lfsck_orphan_index_ops;
 700
 701 static int lfsck_rbtree_setup(const struct lu_env *env,
 702                               struct lfsck_component *com)
 703 {
 704         struct lu_fid                   *fid    = &lfsck_env_info(env)->lti_fid;
 705         struct lfsck_instance           *lfsck  = com->lc_lfsck;
 706         struct dt_device                *dev    = lfsck->li_bottom;
 707         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
 708         struct dt_object                *obj;
 709
 710         fid->f_seq = FID_SEQ_LAYOUT_RBTREE;
 711         fid->f_oid = lfsck_dev_idx(lfsck);
 712         fid->f_ver = 0;
 713         obj = dt_locate(env, dev, fid);
 714         if (IS_ERR(obj))
 715                 RETURN(PTR_ERR(obj));
 716
 717         /* Generate an in-RAM object to stand for the layout rbtree.
 718          * Scanning the layout rbtree will be via the iteration over
 719          * the object. In the future, the rbtree may be written onto
 720          * disk with the object.
 721          *
 722          * Mark the object to be as exist. */
 723         obj->do_lu.lo_header->loh_attr |= LOHA_EXISTS;
 724         obj->do_index_ops = &lfsck_orphan_index_ops;
 725         llsd->llsd_rb_obj = obj;
 726         llsd->llsd_rbtree_valid = 1;
 727         dev->dd_record_fid_accessed = 1;
 728
 729         CDEBUG(D_LFSCK, "%s: layout LFSCK init OST-objects accessing bitmap\n",
 730                lfsck_lfsck2name(lfsck));
 731
 732         return 0;
 733 }
 734
 735 static void lfsck_rbtree_cleanup(const struct lu_env *env,
 736                                  struct lfsck_component *com)
 737 {
 738         struct lfsck_instance           *lfsck = com->lc_lfsck;
 739         struct lfsck_layout_slave_data  *llsd  = com->lc_data;
 740         struct rb_node                  *node  = rb_first(&llsd->llsd_rb_root);
 741         struct rb_node                  *next;
 742         struct lfsck_rbtree_node        *lrn;
 743
 744         lfsck->li_bottom->dd_record_fid_accessed = 0;
 745         /* Invalid the rbtree, then no others will use it. */
 746         down_write(&llsd->llsd_rb_rwsem);
 747         llsd->llsd_rbtree_valid = 0;
 748         up_write(&llsd->llsd_rb_rwsem);
 749
 750         while (node != NULL) {
 751                 next = rb_next(node);
 752                 lrn = rb_entry(node, struct lfsck_rbtree_node, lrn_node);
 753                 rb_erase(node, &llsd->llsd_rb_root);
 754                 lfsck_rbtree_free(lrn);
 755                 node = next;
 756         }
 757
 758         if (llsd->llsd_rb_obj != NULL) {
 759                 lfsck_object_put(env, llsd->llsd_rb_obj);
 760                 llsd->llsd_rb_obj = NULL;
 761         }
 762
 763         CDEBUG(D_LFSCK, "%s: layout LFSCK fini OST-objects accessing bitmap\n",
 764                lfsck_lfsck2name(lfsck));
 765 }
 766
 767 static void lfsck_rbtree_update_bitmap(const struct lu_env *env,
 768                                        struct lfsck_component *com,
 769                                        const struct lu_fid *fid,
 770                                        bool accessed)
 771 {
 772         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
 773         struct lfsck_rbtree_node        *lrn;
 774         bool                             insert = false;
 775         int                              idx;
 776         int                              rc     = 0;
 777         ENTRY;
 778
 779         if (unlikely(!fid_is_sane(fid) || fid_is_last_id(fid)))
 780                 RETURN_EXIT;
 781
 782         if (!fid_is_idif(fid) && !fid_is_norm(fid))
 783                 RETURN_EXIT;
 784
 785         down_read(&llsd->llsd_rb_rwsem);
 786         if (!llsd->llsd_rbtree_valid)
 787                 GOTO(unlock, rc = 0);
 788
 789         lrn = lfsck_rbtree_search(llsd, fid, NULL);
 790         if (lrn == NULL) {
 791                 struct lfsck_rbtree_node *tmp;
 792
 793                 LASSERT(!insert);
 794
 795                 up_read(&llsd->llsd_rb_rwsem);
 796                 tmp = lfsck_rbtree_new(env, fid);
 797                 if (IS_ERR(tmp))
 798                         GOTO(out, rc = PTR_ERR(tmp));
 799
 800                 insert = true;
 801                 down_write(&llsd->llsd_rb_rwsem);
 802                 if (!llsd->llsd_rbtree_valid) {
 803                         lfsck_rbtree_free(tmp);
 804                         GOTO(unlock, rc = 0);
 805                 }
 806
 807                 lrn = lfsck_rbtree_insert(llsd, tmp);
 808                 if (lrn != tmp)
 809                         lfsck_rbtree_free(tmp);
 810         }
 811
 812         idx = fid_oid(fid) & LFSCK_RBTREE_BITMAP_MASK;
 813         /* Any accessed object must be a known object. */
 814         if (!test_and_set_bit(idx, lrn->lrn_known_bitmap))
 815                 atomic_inc(&lrn->lrn_known_count);
 816         if (accessed && !test_and_set_bit(idx, lrn->lrn_accessed_bitmap))
 817                 atomic_inc(&lrn->lrn_accessed_count);
 818
 819         GOTO(unlock, rc = 0);
 820
 821 unlock:
 822         if (insert)
 823                 up_write(&llsd->llsd_rb_rwsem);
 824         else
 825                 up_read(&llsd->llsd_rb_rwsem);
 826 out:
 827         if (rc != 0 && accessed) {
 828                 struct lfsck_layout *lo = com->lc_file_ram;
 829
 830                 CDEBUG(D_LFSCK, "%s: fail to update OST-objects accessing "
 831                        "bitmap, and will cause incorrect LFSCK OST-object "
 832                        "handling, so disable it to cancel orphan handling "
 833                        "for related device. rc = %d\n",
 834                        lfsck_lfsck2name(com->lc_lfsck), rc);
 835
 836                 lo->ll_flags |= LF_INCOMPLETE;
 837                 lfsck_rbtree_cleanup(env, com);
 838         }
 839 }
 840
 841 static inline void lldk_le_to_cpu(struct lfsck_layout_dangling_key *des,
 842                                   const struct lfsck_layout_dangling_key *src)
 843 {
 844         fid_le_to_cpu(&des->lldk_fid, &src->lldk_fid);
 845         des->lldk_comp_id = le32_to_cpu(src->lldk_comp_id);
 846         des->lldk_ea_off = le32_to_cpu(src->lldk_ea_off);
 847 }
 848
 849 static inline void lldk_cpu_to_le(struct lfsck_layout_dangling_key *des,
 850                                   const struct lfsck_layout_dangling_key *src)
 851 {
 852         fid_cpu_to_le(&des->lldk_fid, &src->lldk_fid);
 853         des->lldk_comp_id = cpu_to_le32(src->lldk_comp_id);
 854         des->lldk_ea_off = cpu_to_le32(src->lldk_ea_off);
 855 }
 856
 857 static inline void lldk_be_to_cpu(struct lfsck_layout_dangling_key *des,
 858                                   const struct lfsck_layout_dangling_key *src)
 859 {
 860         fid_be_to_cpu(&des->lldk_fid, &src->lldk_fid);
 861         des->lldk_comp_id = be32_to_cpu(src->lldk_comp_id);
 862         des->lldk_ea_off = be32_to_cpu(src->lldk_ea_off);
 863 }
 864
 865 static inline void lldk_cpu_to_be(struct lfsck_layout_dangling_key *des,
 866                                   const struct lfsck_layout_dangling_key *src)
 867 {
 868         fid_cpu_to_be(&des->lldk_fid, &src->lldk_fid);
 869         des->lldk_comp_id = cpu_to_be32(src->lldk_comp_id);
 870         des->lldk_ea_off = cpu_to_be32(src->lldk_ea_off);
 871 }
 872
 873 static void lfsck_layout_le_to_cpu(struct lfsck_layout *des,
 874                                    const struct lfsck_layout *src)
 875 {
 876         int i;
 877
 878         des->ll_magic = le32_to_cpu(src->ll_magic);
 879         des->ll_status = le32_to_cpu(src->ll_status);
 880         des->ll_flags = le32_to_cpu(src->ll_flags);
 881         des->ll_success_count = le32_to_cpu(src->ll_success_count);
 882         des->ll_run_time_phase1 = le64_to_cpu(src->ll_run_time_phase1);
 883         des->ll_run_time_phase2 = le64_to_cpu(src->ll_run_time_phase2);
 884         des->ll_time_last_complete = le64_to_cpu(src->ll_time_last_complete);
 885         des->ll_time_latest_start = le64_to_cpu(src->ll_time_latest_start);
 886         des->ll_time_last_checkpoint =
 887                                 le64_to_cpu(src->ll_time_last_checkpoint);
 888         des->ll_pos_latest_start = le64_to_cpu(src->ll_pos_latest_start);
 889         des->ll_pos_last_checkpoint = le64_to_cpu(src->ll_pos_last_checkpoint);
 890         des->ll_pos_first_inconsistent =
 891                         le64_to_cpu(src->ll_pos_first_inconsistent);
 892         des->ll_objs_checked_phase1 = le64_to_cpu(src->ll_objs_checked_phase1);
 893         des->ll_objs_failed_phase1 = le64_to_cpu(src->ll_objs_failed_phase1);
 894         des->ll_objs_checked_phase2 = le64_to_cpu(src->ll_objs_checked_phase2);
 895         des->ll_objs_failed_phase2 = le64_to_cpu(src->ll_objs_failed_phase2);
 896         for (i = 0; i < LLIT_MAX; i++)
 897                 des->ll_objs_repaired[i] =
 898                                 le64_to_cpu(src->ll_objs_repaired[i]);
 899         des->ll_objs_skipped = le64_to_cpu(src->ll_objs_skipped);
 900         des->ll_bitmap_size = le32_to_cpu(src->ll_bitmap_size);
 901         lldk_le_to_cpu(&des->ll_lldk_latest_scanned_phase2,
 902                        &src->ll_lldk_latest_scanned_phase2);
 903 }
 904
 905 static void lfsck_layout_cpu_to_le(struct lfsck_layout *des,
 906                                    const struct lfsck_layout *src)
 907 {
 908         int i;
 909
 910         des->ll_magic = cpu_to_le32(src->ll_magic);
 911         des->ll_status = cpu_to_le32(src->ll_status);
 912         des->ll_flags = cpu_to_le32(src->ll_flags);
 913         des->ll_success_count = cpu_to_le32(src->ll_success_count);
 914         des->ll_run_time_phase1 = cpu_to_le64(src->ll_run_time_phase1);
 915         des->ll_run_time_phase2 = cpu_to_le64(src->ll_run_time_phase2);
 916         des->ll_time_last_complete = cpu_to_le64(src->ll_time_last_complete);
 917         des->ll_time_latest_start = cpu_to_le64(src->ll_time_latest_start);
 918         des->ll_time_last_checkpoint =
 919                                 cpu_to_le64(src->ll_time_last_checkpoint);
 920         des->ll_pos_latest_start = cpu_to_le64(src->ll_pos_latest_start);
 921         des->ll_pos_last_checkpoint = cpu_to_le64(src->ll_pos_last_checkpoint);
 922         des->ll_pos_first_inconsistent =
 923                         cpu_to_le64(src->ll_pos_first_inconsistent);
 924         des->ll_objs_checked_phase1 = cpu_to_le64(src->ll_objs_checked_phase1);
 925         des->ll_objs_failed_phase1 = cpu_to_le64(src->ll_objs_failed_phase1);
 926         des->ll_objs_checked_phase2 = cpu_to_le64(src->ll_objs_checked_phase2);
 927         des->ll_objs_failed_phase2 = cpu_to_le64(src->ll_objs_failed_phase2);
 928         for (i = 0; i < LLIT_MAX; i++)
 929                 des->ll_objs_repaired[i] =
 930                                 cpu_to_le64(src->ll_objs_repaired[i]);
 931         des->ll_objs_skipped = cpu_to_le64(src->ll_objs_skipped);
 932         des->ll_bitmap_size = cpu_to_le32(src->ll_bitmap_size);
 933         lldk_cpu_to_le(&des->ll_lldk_latest_scanned_phase2,
 934                        &src->ll_lldk_latest_scanned_phase2);
 935 }
 936
 937 /**
 938  * Load the OST bitmap from the lfsck_layout trace file.
 939  *
 940  * \param[in] env       pointer to the thread context
 941  * \param[in] com       pointer to the lfsck component
 942  *
 943  * \retval              0 for success
 944  * \retval              negative error number on failure or data corruption
 945  */
 946 static int lfsck_layout_load_bitmap(const struct lu_env *env,
 947                                     struct lfsck_component *com)
 948 {
 949         struct dt_object                *obj    = com->lc_obj;
 950         struct lfsck_assistant_data     *lad    = com->lc_data;
 951         struct lfsck_layout             *lo     = com->lc_file_ram;
 952         struct cfs_bitmap                       *bitmap = lad->lad_bitmap;
 953         loff_t                           pos    = com->lc_file_size;
 954         ssize_t                          size;
 955         __u32                            nbits;
 956         int                              rc;
 957         ENTRY;
 958
 959         if (com->lc_lfsck->li_ost_descs.ltd_tgts_bitmap->size >
 960             lo->ll_bitmap_size)
 961                 nbits = com->lc_lfsck->li_ost_descs.ltd_tgts_bitmap->size;
 962         else
 963                 nbits = lo->ll_bitmap_size;
 964
 965         if (unlikely(nbits < BITS_PER_LONG))
 966                 nbits = BITS_PER_LONG;
 967
 968         if (nbits > bitmap->size) {
 969                 __u32 new_bits = bitmap->size;
 970                 struct cfs_bitmap *new_bitmap;
 971
 972                 while (new_bits < nbits)
 973                         new_bits <<= 1;
 974
 975                 new_bitmap = CFS_ALLOCATE_BITMAP(new_bits);
 976                 if (new_bitmap == NULL)
 977                         RETURN(-ENOMEM);
 978
 979                 lad->lad_bitmap = new_bitmap;
 980                 CFS_FREE_BITMAP(bitmap);
 981                 bitmap = new_bitmap;
 982         }
 983
 984         if (lo->ll_bitmap_size == 0) {
 985                 clear_bit(LAD_INCOMPLETE, &lad->lad_flags);
 986                 CFS_RESET_BITMAP(bitmap);
 987
 988                 RETURN(0);
 989         }
 990
 991         size = (lo->ll_bitmap_size + 7) >> 3;
 992         rc = dt_read(env, obj, lfsck_buf_get(env, bitmap->data, size), &pos);
 993         if (rc != size)
 994                 RETURN(rc >= 0 ? -EINVAL : rc);
 995
 996         if (cfs_bitmap_check_empty(bitmap))
 997                 clear_bit(LAD_INCOMPLETE, &lad->lad_flags);
 998         else
 999                 set_bit(LAD_INCOMPLETE, &lad->lad_flags);
1000
1001         RETURN(0);
1002 }
1003
1004 /**
1005  * Load the layout LFSCK trace file from disk.
1006  *
1007  * The layout LFSCK trace file records the layout LFSCK status information
1008  * and other statistics, such as how many objects have been scanned, and how
1009  * many objects have been repaired, and etc. It also contains the bitmap for
1010  * failed OSTs during the layout LFSCK. All these information will be loaded
1011  * from disk to RAM when the layout LFSCK component setup.
1012  *
1013  * \param[in] env       pointer to the thread context
1014  * \param[in] com       pointer to the lfsck component
1015  *
1016  * \retval              positive number for file data corruption, the caller
1017  *                      should reset the layout LFSCK trace file
1018  * \retval              0 for success
1019  * \retval              negative error number on failure
1020  */
1021 static int lfsck_layout_load(const struct lu_env *env,
1022                              struct lfsck_component *com)
1023 {
1024         struct lfsck_layout             *lo     = com->lc_file_ram;
1025         ssize_t                          size   = com->lc_file_size;
1026         loff_t                           pos    = 0;
1027         int                              rc;
1028
1029         rc = dt_read(env, com->lc_obj,
1030                      lfsck_buf_get(env, com->lc_file_disk, size), &pos);
1031         if (rc == 0) {
1032                 return -ENOENT;
1033         } else if (rc < 0) {
1034                 CDEBUG(D_LFSCK, "%s: failed to load lfsck_layout: rc = %d\n",
1035                        lfsck_lfsck2name(com->lc_lfsck), rc);
1036                 return rc;
1037         } else if (rc != size) {
1038                 CDEBUG(D_LFSCK, "%s: lfsck_layout size %u != %u; reset it\n",
1039                        lfsck_lfsck2name(com->lc_lfsck), rc, (unsigned int)size);
1040                 return 1;
1041         }
1042
1043         lfsck_layout_le_to_cpu(lo, com->lc_file_disk);
1044         if (lo->ll_magic != LFSCK_LAYOUT_MAGIC) {
1045                 CDEBUG(D_LFSCK, "%s: invalid lfsck_layout magic %#x != %#x, "
1046                        "to be reset\n", lfsck_lfsck2name(com->lc_lfsck),
1047                        lo->ll_magic, LFSCK_LAYOUT_MAGIC);
1048                 return 1;
1049         }
1050
1051         return 0;
1052 }
1053
1054 /**
1055  * Store the layout LFSCK trace file on disk.
1056  *
1057  * The layout LFSCK trace file records the layout LFSCK status information
1058  * and other statistics, such as how many objects have been scanned, and how
1059  * many objects have been repaired, and etc. It also contains the bitmap for
1060  * failed OSTs during the layout LFSCK. All these information will be synced
1061  * from RAM to disk periodically.
1062  *
1063  * \param[in] env       pointer to the thread context
1064  * \param[in] com       pointer to the lfsck component
1065  *
1066  * \retval              0 for success
1067  * \retval              negative error number on failure
1068  */
1069 static int lfsck_layout_store(const struct lu_env *env,
1070                               struct lfsck_component *com)
1071 {
1072         struct dt_object        *obj    = com->lc_obj;
1073         struct lfsck_instance   *lfsck  = com->lc_lfsck;
1074         struct lfsck_layout     *lo_ram = com->lc_file_ram;
1075         struct lfsck_layout     *lo     = com->lc_file_disk;
1076         struct thandle          *th;
1077         struct dt_device        *dev    = lfsck_obj2dev(obj);
1078         struct cfs_bitmap       *bitmap = NULL;
1079         loff_t                   pos;
1080         ssize_t                  size   = com->lc_file_size;
1081         __u32                    nbits  = 0;
1082         int                      rc;
1083         ENTRY;
1084
1085         if (lfsck->li_master) {
1086                 struct lfsck_assistant_data *lad = com->lc_data;
1087
1088                 bitmap = lad->lad_bitmap;
1089                 nbits = bitmap->size;
1090
1091                 LASSERT(nbits > 0);
1092                 LASSERTF((nbits & 7) == 0, "Invalid nbits %u\n", nbits);
1093         }
1094
1095         lo_ram->ll_bitmap_size = nbits;
1096         lfsck_layout_cpu_to_le(lo, lo_ram);
1097         th = dt_trans_create(env, dev);
1098         if (IS_ERR(th))
1099                 GOTO(log, rc = PTR_ERR(th));
1100
1101         rc = dt_declare_record_write(env, obj, lfsck_buf_get(env, lo, size),
1102                                      (loff_t)0, th);
1103         if (rc != 0)
1104                 GOTO(out, rc);
1105
1106         if (bitmap != NULL) {
1107                 rc = dt_declare_record_write(env, obj,
1108                                 lfsck_buf_get(env, bitmap->data, nbits >> 3),
1109                                 (loff_t)size, th);
1110                 if (rc != 0)
1111                         GOTO(out, rc);
1112         }
1113
1114         rc = dt_trans_start_local(env, dev, th);
1115         if (rc != 0)
1116                 GOTO(out, rc);
1117
1118         pos = 0;
1119         rc = dt_record_write(env, obj, lfsck_buf_get(env, lo, size), &pos, th);
1120         if (rc != 0)
1121                 GOTO(out, rc);
1122
1123         if (bitmap != NULL) {
1124                 pos = size;
1125                 rc = dt_record_write(env, obj,
1126                                 lfsck_buf_get(env, bitmap->data, nbits >> 3),
1127                                 &pos, th);
1128         }
1129
1130         GOTO(out, rc);
1131
1132 out:
1133         dt_trans_stop(env, dev, th);
1134
1135 log:
1136         if (rc != 0)
1137                 CDEBUG(D_LFSCK, "%s: fail to store lfsck_layout: rc = %d\n",
1138                        lfsck_lfsck2name(lfsck), rc);
1139
1140         return rc;
1141 }
1142
1143 static int lfsck_layout_init(const struct lu_env *env,
1144                              struct lfsck_component *com)
1145 {
1146         struct lfsck_layout *lo = com->lc_file_ram;
1147         int rc;
1148
1149         memset(lo, 0, com->lc_file_size);
1150         lo->ll_magic = LFSCK_LAYOUT_MAGIC;
1151         lo->ll_status = LS_INIT;
1152         down_write(&com->lc_sem);
1153         rc = lfsck_layout_store(env, com);
1154         if (rc == 0 && com->lc_lfsck->li_master)
1155                 rc = lfsck_load_sub_trace_files(env, com,
1156                         &dt_lfsck_layout_dangling_features, LFSCK_LAYOUT, true);
1157         up_write(&com->lc_sem);
1158
1159         return rc;
1160 }
1161
1162 static int fid_is_for_ostobj(const struct lu_env *env,
1163                              struct lfsck_instance *lfsck,
1164                              struct dt_object *obj, const struct lu_fid *fid)
1165 {
1166         struct seq_server_site  *ss     = lfsck_dev_site(lfsck);
1167         struct lu_seq_range     *range  = &lfsck_env_info(env)->lti_range;
1168         struct lustre_ost_attrs *loa;
1169         int                      rc;
1170
1171         fld_range_set_any(range);
1172         rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(fid), range);
1173         if (rc == 0) {
1174                 if (fld_range_is_ost(range))
1175                         return 1;
1176
1177                 return 0;
1178         }
1179
1180         loa = &lfsck_env_info(env)->lti_loa;
1181         rc = dt_xattr_get(env, obj, lfsck_buf_get(env, loa, sizeof(*loa)),
1182                           XATTR_NAME_LMA);
1183         if (rc >= (int)sizeof(struct lustre_mdt_attrs)) {
1184                 lustre_lma_swab(&loa->loa_lma);
1185
1186                 return loa->loa_lma.lma_compat & LMAC_FID_ON_OST ? 1 : 0;
1187         }
1188
1189         rc = dt_xattr_get(env, obj, &LU_BUF_NULL, XATTR_NAME_FID);
1190
1191         return rc > 0;
1192 }
1193
1194 static struct lfsck_layout_seq *
1195 lfsck_layout_seq_lookup(struct lfsck_layout_slave_data *llsd, __u64 seq)
1196 {
1197         struct lfsck_layout_seq *lls;
1198
1199         list_for_each_entry(lls, &llsd->llsd_seq_list, lls_list) {
1200                 if (lls->lls_seq == seq)
1201                         return lls;
1202
1203                 if (lls->lls_seq > seq)
1204                         return NULL;
1205         }
1206
1207         return NULL;
1208 }
1209
1210 static void
1211 lfsck_layout_seq_insert(struct lfsck_layout_slave_data *llsd,
1212                         struct lfsck_layout_seq *lls)
1213 {
1214         struct lfsck_layout_seq *tmp;
1215         struct list_head        *pos = &llsd->llsd_seq_list;
1216
1217         list_for_each_entry(tmp, &llsd->llsd_seq_list, lls_list) {
1218                 if (lls->lls_seq < tmp->lls_seq) {
1219                         pos = &tmp->lls_list;
1220                         break;
1221                 }
1222         }
1223         list_add_tail(&lls->lls_list, pos);
1224 }
1225
1226 static int
1227 lfsck_layout_lastid_create(const struct lu_env *env,
1228                            struct lfsck_instance *lfsck,
1229                            struct dt_object *obj)
1230 {
1231         struct lfsck_thread_info *info   = lfsck_env_info(env);
1232         struct lu_attr           *la     = &info->lti_la;
1233         struct dt_object_format  *dof    = &info->lti_dof;
1234         struct lfsck_bookmark    *bk     = &lfsck->li_bookmark_ram;
1235         struct dt_device         *dt     = lfsck_obj2dev(obj);
1236         struct thandle           *th;
1237         __u64                     lastid = 0;
1238         loff_t                    pos    = 0;
1239         int                       rc;
1240         ENTRY;
1241
1242         if (bk->lb_param & LPF_DRYRUN)
1243                 return 0;
1244
1245         memset(la, 0, sizeof(*la));
1246         la->la_mode = S_IFREG |  S_IRUGO | S_IWUSR;
1247         la->la_valid = LA_MODE | LA_UID | LA_GID;
1248         memset(dof, 0, sizeof(*dof));
1249         dof->dof_type = dt_mode_to_dft(S_IFREG);
1250
1251         th = lfsck_trans_create(env, dt, lfsck);
1252         if (IS_ERR(th))
1253                 GOTO(log, rc = PTR_ERR(th));
1254
1255         rc = dt_declare_create(env, obj, la, NULL, dof, th);
1256         if (rc != 0)
1257                 GOTO(stop, rc);
1258
1259         rc = dt_declare_record_write(env, obj,
1260                                      lfsck_buf_get(env, &lastid,
1261                                                    sizeof(lastid)),
1262                                      pos, th);
1263         if (rc != 0)
1264                 GOTO(stop, rc);
1265
1266         rc = dt_trans_start_local(env, dt, th);
1267         if (rc != 0)
1268                 GOTO(stop, rc);
1269
1270         dt_write_lock(env, obj, 0);
1271         if (likely(dt_object_exists(obj) == 0)) {
1272                 rc = dt_create(env, obj, la, NULL, dof, th);
1273                 if (rc == 0)
1274                         rc = dt_record_write(env, obj,
1275                                 lfsck_buf_get(env, &lastid, sizeof(lastid)),
1276                                 &pos, th);
1277         }
1278         dt_write_unlock(env, obj);
1279
1280         GOTO(stop, rc);
1281
1282 stop:
1283         dt_trans_stop(env, dt, th);
1284
1285 log:
1286         CDEBUG(D_LFSCK, "%s: layout LFSCK will create LAST_ID for <seq> "
1287                "%#llx: rc = %d\n",
1288                lfsck_lfsck2name(lfsck), fid_seq(lfsck_dto2fid(obj)), rc);
1289
1290         return rc;
1291 }
1292
1293 static int
1294 lfsck_layout_lastid_reload(const struct lu_env *env,
1295                            struct lfsck_component *com,
1296                            struct lfsck_layout_seq *lls)
1297 {
1298         __u64   lastid;
1299         loff_t  pos     = 0;
1300         int     rc;
1301
1302         dt_read_lock(env, lls->lls_lastid_obj, 0);
1303         rc = dt_record_read(env, lls->lls_lastid_obj,
1304                             lfsck_buf_get(env, &lastid, sizeof(lastid)), &pos);
1305         dt_read_unlock(env, lls->lls_lastid_obj);
1306         if (unlikely(rc != 0))
1307                 return rc;
1308
1309         lastid = le64_to_cpu(lastid);
1310         if (lastid < lls->lls_lastid_known) {
1311                 struct lfsck_instance   *lfsck  = com->lc_lfsck;
1312                 struct lfsck_layout     *lo     = com->lc_file_ram;
1313
1314                 lls->lls_lastid = lls->lls_lastid_known;
1315                 lls->lls_dirty = 1;
1316                 if (!(lo->ll_flags & LF_CRASHED_LASTID)) {
1317                         LASSERT(lfsck->li_out_notify != NULL);
1318
1319                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
1320                                              LE_LASTID_REBUILDING);
1321                         lo->ll_flags |= LF_CRASHED_LASTID;
1322
1323                         CDEBUG(D_LFSCK, "%s: layout LFSCK finds crashed "
1324                                "LAST_ID file (1) for the sequence %#llx"
1325                                ", old value %llu, known value %llu\n",
1326                                lfsck_lfsck2name(lfsck), lls->lls_seq,
1327                                lastid, lls->lls_lastid);
1328                 }
1329         } else if (lastid >= lls->lls_lastid) {
1330                 lls->lls_lastid = lastid;
1331                 lls->lls_dirty = 0;
1332         }
1333
1334         return 0;
1335 }
1336
1337 static int
1338 lfsck_layout_lastid_store(const struct lu_env *env,
1339                           struct lfsck_component *com)
1340 {
1341         struct lfsck_instance           *lfsck  = com->lc_lfsck;
1342         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
1343         struct dt_device                *dt     = lfsck->li_bottom;
1344         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
1345         struct lfsck_layout_seq         *lls;
1346         struct thandle                  *th;
1347         __u64                            lastid;
1348         int                              rc     = 0;
1349         int                              rc1    = 0;
1350
1351         list_for_each_entry(lls, &llsd->llsd_seq_list, lls_list) {
1352                 loff_t pos = 0;
1353
1354                 if (!lls->lls_dirty)
1355                         continue;
1356
1357                 CDEBUG(D_LFSCK, "%s: layout LFSCK will sync the LAST_ID for "
1358                        "<seq> %#llx as <oid> %llu\n",
1359                        lfsck_lfsck2name(lfsck), lls->lls_seq, lls->lls_lastid);
1360
1361                 if (bk->lb_param & LPF_DRYRUN) {
1362                         lls->lls_dirty = 0;
1363                         continue;
1364                 }
1365
1366                 th = lfsck_trans_create(env, dt, lfsck);
1367                 if (IS_ERR(th)) {
1368                         rc1 = PTR_ERR(th);
1369                         CDEBUG(D_LFSCK, "%s: layout LFSCK failed to store "
1370                                "the LAST_ID for <seq> %#llx(1): rc = %d\n",
1371                                lfsck_lfsck2name(com->lc_lfsck),
1372                                lls->lls_seq, rc1);
1373                         continue;
1374                 }
1375
1376                 lastid = cpu_to_le64(lls->lls_lastid);
1377                 rc = dt_declare_record_write(env, lls->lls_lastid_obj,
1378                                              lfsck_buf_get(env, &lastid,
1379                                                            sizeof(lastid)),
1380                                              pos, th);
1381                 if (rc != 0)
1382                         goto stop;
1383
1384                 rc = dt_trans_start_local(env, dt, th);
1385                 if (rc != 0)
1386                         goto stop;
1387
1388                 dt_write_lock(env, lls->lls_lastid_obj, 0);
1389                 rc = dt_record_write(env, lls->lls_lastid_obj,
1390                                      lfsck_buf_get(env, &lastid,
1391                                      sizeof(lastid)), &pos, th);
1392                 dt_write_unlock(env, lls->lls_lastid_obj);
1393                 if (rc == 0)
1394                         lls->lls_dirty = 0;
1395
1396 stop:
1397                 dt_trans_stop(env, dt, th);
1398                 if (rc != 0) {
1399                         rc1 = rc;
1400                         CDEBUG(D_LFSCK, "%s: layout LFSCK failed to store "
1401                                "the LAST_ID for <seq> %#llx(2): rc = %d\n",
1402                                lfsck_lfsck2name(com->lc_lfsck),
1403                                lls->lls_seq, rc1);
1404                 }
1405         }
1406
1407         return rc1;
1408 }
1409
1410 static int
1411 lfsck_layout_lastid_load(const struct lu_env *env,
1412                          struct lfsck_component *com,
1413                          struct lfsck_layout_seq *lls)
1414 {
1415         struct lfsck_instance   *lfsck  = com->lc_lfsck;
1416         struct lfsck_layout     *lo     = com->lc_file_ram;
1417         struct lu_fid           *fid    = &lfsck_env_info(env)->lti_fid;
1418         struct dt_object        *obj;
1419         loff_t                   pos    = 0;
1420         int                      rc;
1421         ENTRY;
1422
1423         lu_last_id_fid(fid, lls->lls_seq, lfsck_dev_idx(lfsck));
1424         obj = dt_locate(env, lfsck->li_bottom, fid);
1425         if (IS_ERR(obj))
1426                 RETURN(PTR_ERR(obj));
1427
1428         /* LAST_ID crashed, to be rebuilt */
1429         if (dt_object_exists(obj) == 0) {
1430                 if (!(lo->ll_flags & LF_CRASHED_LASTID)) {
1431                         LASSERT(lfsck->li_out_notify != NULL);
1432
1433                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
1434                                              LE_LASTID_REBUILDING);
1435                         lo->ll_flags |= LF_CRASHED_LASTID;
1436
1437                         CDEBUG(D_LFSCK, "%s: layout LFSCK cannot find the "
1438                                "LAST_ID file for sequence %#llx\n",
1439                                lfsck_lfsck2name(lfsck), lls->lls_seq);
1440
1441                         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY4) &&
1442                             cfs_fail_val > 0) {
1443                                 struct ptlrpc_thread *thread =
1444                                         &lfsck->li_thread;
1445
1446                                 up_write(&com->lc_sem);
1447                                 wait_event_idle_timeout(
1448                                         thread->t_ctl_waitq,
1449                                         !thread_is_running(thread),
1450                                         cfs_time_seconds(cfs_fail_val));
1451                                 down_write(&com->lc_sem);
1452                         }
1453                 }
1454
1455                 rc = lfsck_layout_lastid_create(env, lfsck, obj);
1456         } else {
1457                 dt_read_lock(env, obj, 0);
1458                 rc = dt_read(env, obj,
1459                         lfsck_buf_get(env, &lls->lls_lastid, sizeof(__u64)),
1460                         &pos);
1461                 dt_read_unlock(env, obj);
1462                 if (rc != 0 && rc != sizeof(__u64))
1463                         GOTO(out, rc = (rc > 0 ? -EFAULT : rc));
1464
1465                 if (rc == 0 && !(lo->ll_flags & LF_CRASHED_LASTID)) {
1466                         LASSERT(lfsck->li_out_notify != NULL);
1467
1468                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
1469                                              LE_LASTID_REBUILDING);
1470                         lo->ll_flags |= LF_CRASHED_LASTID;
1471
1472                         CDEBUG(D_LFSCK, "%s: layout LFSCK finds invalid "
1473                                "LAST_ID file for the sequence %#llx"
1474                                ": rc = %d\n",
1475                                lfsck_lfsck2name(lfsck), lls->lls_seq, rc);
1476                 }
1477
1478                 lls->lls_lastid = le64_to_cpu(lls->lls_lastid);
1479                 rc = 0;
1480         }
1481
1482         GOTO(out, rc);
1483
1484 out:
1485         if (rc != 0)
1486                 lfsck_object_put(env, obj);
1487         else
1488                 lls->lls_lastid_obj = obj;
1489
1490         return rc;
1491 }
1492
1493 static void lfsck_layout_record_failure(const struct lu_env *env,
1494                                         struct lfsck_instance *lfsck,
1495                                         struct lfsck_layout *lo)
1496 {
1497         __u64 cookie;
1498
1499         lo->ll_objs_failed_phase1++;
1500         cookie = lfsck->li_obj_oit->do_index_ops->dio_it.store(env,
1501                                                         lfsck->li_di_oit);
1502         if (lo->ll_pos_first_inconsistent == 0 ||
1503             lo->ll_pos_first_inconsistent < cookie) {
1504                 lo->ll_pos_first_inconsistent = cookie;
1505
1506                 CDEBUG(D_LFSCK, "%s: layout LFSCK hit first non-repaired "
1507                        "inconsistency at the pos [%llu]\n",
1508                        lfsck_lfsck2name(lfsck),
1509                        lo->ll_pos_first_inconsistent);
1510         }
1511 }
1512
1513 static int lfsck_layout_double_scan_result(const struct lu_env *env,
1514                                            struct lfsck_component *com,
1515                                            int rc)
1516 {
1517         struct lfsck_instance   *lfsck = com->lc_lfsck;
1518         struct lfsck_layout     *lo    = com->lc_file_ram;
1519
1520         CDEBUG(D_LFSCK, "%s: layout LFSCK double scan: rc = %d\n",
1521                lfsck_lfsck2name(lfsck), rc);
1522
1523         down_write(&com->lc_sem);
1524         lo->ll_run_time_phase2 += ktime_get_seconds() -
1525                                   com->lc_time_last_checkpoint;
1526         lo->ll_time_last_checkpoint = ktime_get_real_seconds();
1527         lo->ll_objs_checked_phase2 += com->lc_new_checked;
1528
1529         if (rc > 0) {
1530                 if (lo->ll_flags & LF_INCOMPLETE) {
1531                         lo->ll_status = LS_PARTIAL;
1532                 } else {
1533                         if (lfsck->li_master) {
1534                                 struct lfsck_assistant_data *lad = com->lc_data;
1535
1536                                 if (test_bit(LAD_INCOMPLETE, &lad->lad_flags))
1537                                         lo->ll_status = LS_PARTIAL;
1538                                 else
1539                                         lo->ll_status = LS_COMPLETED;
1540                         } else {
1541                                 lo->ll_status = LS_COMPLETED;
1542                         }
1543                 }
1544                 lo->ll_flags &= ~LF_SCANNED_ONCE;
1545                 if (!(lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN))
1546                         lo->ll_flags &= ~LF_INCONSISTENT;
1547                 lo->ll_time_last_complete = lo->ll_time_last_checkpoint;
1548                 lo->ll_success_count++;
1549         } else if (rc == 0) {
1550                 if (lfsck->li_status != 0)
1551                         lo->ll_status = lfsck->li_status;
1552                 else
1553                         lo->ll_status = LS_STOPPED;
1554         } else {
1555                 lo->ll_status = LS_FAILED;
1556         }
1557
1558         rc = lfsck_layout_store(env, com);
1559         up_write(&com->lc_sem);
1560
1561         CDEBUG(D_LFSCK, "%s: layout LFSCK double scan result %u: rc = %d\n",
1562                lfsck_lfsck2name(lfsck), lo->ll_status, rc);
1563
1564         return rc;
1565 }
1566
1567 static int lfsck_layout_trans_stop(const struct lu_env *env,
1568                                    struct dt_device *dev,
1569                                    struct thandle *handle, int result)
1570 {
1571         int rc;
1572
1573         /* XXX: If there is something worng or it needs to repair nothing,
1574          *      then notify the lower to stop the modification. Currently,
1575          *      we use th_result for such purpose, that may be replaced by
1576          *      some rollback mechanism in the future. */
1577         handle->th_result = result;
1578         rc = dt_trans_stop(env, dev, handle);
1579         if (result != 0)
1580                 return result > 0 ? 0 : result;
1581
1582         return rc == 0 ? 1 : rc;
1583 }
1584
1585 static int lfsck_layout_ins_dangling_rec(const struct lu_env *env,
1586                                          struct lfsck_component *com,
1587                                          const struct lu_fid *pfid,
1588                                          const struct lu_fid *cfid,
1589                                          __u32 comp_id, __u32 ea_off,
1590                                          __u32 ost_idx)
1591 {
1592         struct lfsck_layout_dangling_key *key = &lfsck_env_info(env)->lti_lldk;
1593         struct lu_fid *rec = &lfsck_env_info(env)->lti_fid3;
1594         struct dt_device *dev;
1595         struct dt_object *obj;
1596         struct thandle *th = NULL;
1597         int idx;
1598         int rc = 0;
1599         ENTRY;
1600
1601         idx = lfsck_sub_trace_file_fid2idx(pfid);
1602         obj = com->lc_sub_trace_objs[idx].lsto_obj;
1603         dev = lfsck_obj2dev(obj);
1604
1605         fid_cpu_to_be(&key->lldk_fid, pfid);
1606         key->lldk_comp_id = cpu_to_be32(comp_id);
1607         key->lldk_ea_off = cpu_to_be32(ea_off);
1608
1609         fid_cpu_to_be(rec, cfid);
1610         rec->f_ver = cpu_to_be32(ost_idx);
1611
1612         mutex_lock(&com->lc_sub_trace_objs[idx].lsto_mutex);
1613
1614         th = lfsck_trans_create(env, dev, com->lc_lfsck);
1615         if (IS_ERR(th))
1616                 GOTO(unlock, rc = PTR_ERR(th));
1617
1618         rc = dt_declare_insert(env, obj,
1619                                (const struct dt_rec *)rec,
1620                                (const struct dt_key *)key, th);
1621         if (rc)
1622                 GOTO(unlock, rc);
1623
1624         rc = dt_trans_start_local(env, dev, th);
1625         if (rc)
1626                 GOTO(unlock, rc);
1627
1628         rc = dt_insert(env, obj, (const struct dt_rec *)rec,
1629                        (const struct dt_key *)key, th);
1630
1631         GOTO(unlock, rc);
1632
1633 unlock:
1634         if (th && !IS_ERR(th))
1635                 dt_trans_stop(env, dev, th);
1636
1637         mutex_unlock(&com->lc_sub_trace_objs[idx].lsto_mutex);
1638
1639         CDEBUG(D_LFSCK, "%s: insert the paris "DFID" => "DFID", comp_id = %u, "
1640                "ea_off = %u, ost_idx = %u, into the trace file for further "
1641                "dangling check: rc = %d\n", lfsck_lfsck2name(com->lc_lfsck),
1642                PFID(pfid), PFID(cfid), comp_id, ea_off, ost_idx, rc);
1643
1644         return rc;
1645 }
1646
1647 static int lfsck_layout_del_dangling_rec(const struct lu_env *env,
1648                                          struct lfsck_component *com,
1649                                          const struct lu_fid *fid,
1650                                          __u32 comp_id, __u32 ea_off)
1651 {
1652         struct lfsck_layout_dangling_key *key = &lfsck_env_info(env)->lti_lldk;
1653         struct dt_device *dev;
1654         struct dt_object *obj;
1655         struct thandle *th = NULL;
1656         int idx;
1657         int rc = 0;
1658         ENTRY;
1659
1660         idx = lfsck_sub_trace_file_fid2idx(fid);
1661         obj = com->lc_sub_trace_objs[idx].lsto_obj;
1662         dev = lfsck_obj2dev(obj);
1663
1664         fid_cpu_to_be(&key->lldk_fid, fid);
1665         key->lldk_comp_id = cpu_to_be32(comp_id);
1666         key->lldk_ea_off = cpu_to_be32(ea_off);
1667
1668         mutex_lock(&com->lc_sub_trace_objs[idx].lsto_mutex);
1669
1670         th = lfsck_trans_create(env, dev, com->lc_lfsck);
1671         if (IS_ERR(th))
1672                 GOTO(unlock, rc = PTR_ERR(th));
1673
1674         rc = dt_declare_delete(env, obj, (const struct dt_key *)key, th);
1675         if (rc)
1676                 GOTO(unlock, rc);
1677
1678         rc = dt_trans_start_local(env, dev, th);
1679         if (rc)
1680                 GOTO(unlock, rc);
1681
1682         rc = dt_delete(env, obj, (const struct dt_key *)key, th);
1683
1684         GOTO(unlock, rc);
1685
1686 unlock:
1687         if (th && !IS_ERR(th))
1688                 dt_trans_stop(env, dev, th);
1689
1690         mutex_unlock(&com->lc_sub_trace_objs[idx].lsto_mutex);
1691
1692         CDEBUG(D_LFSCK, "%s: delete the dangling record for "DFID
1693                ", comp_id = %u, ea_off = %u from the trace file: rc = %d\n",
1694                lfsck_lfsck2name(com->lc_lfsck), PFID(fid), comp_id, ea_off, rc);
1695
1696         return rc;
1697 }
1698
1699 /**
1700  * Get the system default stripe size.
1701  *
1702  * \param[in] env       pointer to the thread context
1703  * \param[in] lfsck     pointer to the lfsck instance
1704  * \param[out] size     pointer to the default stripe size
1705  *
1706  * \retval              0 for success
1707  * \retval              negative error number on failure
1708  */
1709 static int lfsck_layout_get_def_stripesize(const struct lu_env *env,
1710                                            struct lfsck_instance *lfsck,
1711                                            __u32 *size)
1712 {
1713         struct lov_user_md      *lum = &lfsck_env_info(env)->lti_lum;
1714         struct dt_object        *root;
1715         int                      rc;
1716
1717         root = dt_locate(env, lfsck->li_next, &lfsck->li_local_root_fid);
1718         if (IS_ERR(root))
1719                 return PTR_ERR(root);
1720
1721         /* Get the default stripe size via xattr_get on the backend root. */
1722         rc = dt_xattr_get(env, root, lfsck_buf_get(env, lum, sizeof(*lum)),
1723                           XATTR_NAME_LOV);
1724         if (rc > 0) {
1725                 /* The lum->lmm_stripe_size is LE mode. The *size also
1726                  * should be LE mode. So it is unnecessary to convert. */
1727                 *size = lum->lmm_stripe_size;
1728                 rc = 0;
1729         } else if (unlikely(rc == 0)) {
1730                 rc = -EINVAL;
1731         }
1732
1733         lfsck_object_put(env, root);
1734
1735         return rc;
1736 }
1737
1738 /**
1739  * \retval       +1: repaired
1740  * \retval        0: did nothing
1741  * \retval      -ve: on error
1742  */
1743 static int lfsck_layout_refill_lovea(const struct lu_env *env,
1744                                      struct lfsck_instance *lfsck,
1745                                      struct thandle *handle,
1746                                      struct dt_object *parent,
1747                                      const struct lu_fid *cfid,
1748                                      struct lu_buf *buf,
1749                                      struct lov_mds_md_v1 *lmm,
1750                                      struct lov_ost_data_v1 *slot,
1751                                      int fl, __u32 ost_idx, int size)
1752 {
1753         struct ost_id           *oi     = &lfsck_env_info(env)->lti_oi;
1754         struct lu_buf            ea_buf;
1755         int                      rc;
1756         __u32                    magic;
1757         __u32                    pattern;
1758         __u16                    count;
1759         ENTRY;
1760
1761         magic = le32_to_cpu(lmm->lmm_magic);
1762         pattern = le32_to_cpu(lmm->lmm_pattern);
1763         count = le16_to_cpu(lmm->lmm_stripe_count);
1764
1765         fid_to_ostid(cfid, oi);
1766         ostid_cpu_to_le(oi, &slot->l_ost_oi);
1767         slot->l_ost_gen = cpu_to_le32(0);
1768         slot->l_ost_idx = cpu_to_le32(ost_idx);
1769
1770         if (pattern & LOV_PATTERN_F_HOLE) {
1771                 struct lov_ost_data_v1 *objs;
1772                 int                     i;
1773
1774                 if (magic == LOV_MAGIC_V1)
1775                         objs = &lmm->lmm_objects[0];
1776                 else
1777                         objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
1778                 for (i = 0; i < count; i++, objs++) {
1779                         if (lovea_slot_is_dummy(objs))
1780                                 break;
1781                 }
1782
1783                 /* If the @slot is the last dummy slot to be refilled,
1784                  * then drop LOV_PATTERN_F_HOLE from lmm::lmm_pattern. */
1785                 if (i == count) {
1786                         lmm->lmm_pattern =
1787                                 cpu_to_le32(pattern & ~LOV_PATTERN_F_HOLE);
1788
1789                         CDEBUG(D_LFSCK, "%s: remove layout HOLE for "DFID
1790                                ": parent "DFID"\n", lfsck_lfsck2name(lfsck),
1791                                PFID(cfid), PFID(lfsck_dto2fid(parent)));
1792                 }
1793         }
1794
1795         lfsck_buf_init(&ea_buf, buf->lb_buf, size);
1796         rc = dt_xattr_set(env, parent, &ea_buf, XATTR_NAME_LOV, fl, handle);
1797         if (rc == 0)
1798                 rc = 1;
1799
1800         RETURN(rc);
1801 }
1802
1803 static struct lov_ost_data_v1 *
1804 __lfsck_layout_new_v1_lovea(struct lov_mds_md_v1 *lmm,
1805                             const struct lu_fid *pfid,
1806                             __u32 stripe_size, __u32 ea_off,
1807                             __u32 pattern, __u16 count)
1808 {
1809         lmm->lmm_magic = cpu_to_le32(LOV_MAGIC_V1);
1810         lmm->lmm_pattern = cpu_to_le32(pattern);
1811         fid_to_lmm_oi(pfid, &lmm->lmm_oi);
1812         lmm_oi_cpu_to_le(&lmm->lmm_oi, &lmm->lmm_oi);
1813         lmm->lmm_stripe_size = cpu_to_le32(stripe_size);
1814         lmm->lmm_stripe_count = cpu_to_le16(count);
1815         lmm->lmm_layout_gen = cpu_to_le16(1);
1816         memset(&lmm->lmm_objects[0], 0,
1817                sizeof(struct lov_ost_data_v1) * count);
1818
1819         return &lmm->lmm_objects[ea_off];
1820 }
1821
1822 static int lfsck_layout_new_v1_lovea(const struct lu_env *env,
1823                                      struct lfsck_instance *lfsck,
1824                                      struct ost_layout *ol,
1825                                      struct dt_object *parent,
1826                                      struct lu_buf *buf, __u32 ea_off,
1827                                      struct lov_mds_md_v1 **lmm,
1828                                      struct lov_ost_data_v1 **objs)
1829 {
1830         int size;
1831         __u32 stripe_size = ol->ol_stripe_size;
1832         __u32 pattern = LOV_PATTERN_RAID0;
1833         __u16 count;
1834
1835         if (ol->ol_stripe_count != 0)
1836                 count = ol->ol_stripe_count;
1837         else
1838                 count = ea_off + 1;
1839
1840         size = lov_mds_md_size(count, LOV_MAGIC_V1);
1841         LASSERTF(buf->lb_len >= size,
1842                  "buffer len %d is less than real size %d\n",
1843                  (int)buf->lb_len, size);
1844
1845         if (stripe_size == 0) {
1846                 int rc;
1847
1848                 rc = lfsck_layout_get_def_stripesize(env, lfsck, &stripe_size);
1849                 if (rc)
1850                         return rc;
1851         }
1852
1853         *lmm = buf->lb_buf;
1854         if (ol->ol_stripe_count > 1 ||
1855             (ol->ol_stripe_count == 0 && ea_off != 0)) {
1856                 pattern |= LOV_PATTERN_F_HOLE;
1857                 memset(&(*lmm)->lmm_objects[0], 0,
1858                        count * sizeof(struct lov_ost_data_v1));
1859         }
1860
1861         *objs = __lfsck_layout_new_v1_lovea(*lmm, lfsck_dto2fid(parent),
1862                                 stripe_size, ea_off, pattern, count);
1863
1864         return size;
1865 }
1866
1867 static int lfsck_layout_new_comp_lovea(const struct lu_env *env,
1868                                        struct lu_orphan_rec_v3 *rec,
1869                                        struct dt_object *parent,
1870                                        struct lu_buf *buf, __u32 ea_off,
1871                                        struct lov_mds_md_v1 **lmm,
1872                                        struct lov_ost_data_v1 **objs)
1873 {
1874         struct ost_layout *ol = &rec->lor_layout;
1875         struct lov_comp_md_v1 *lcm;
1876         struct lov_comp_md_entry_v1 *lcme;
1877         __u32 pattern = LOV_PATTERN_RAID0;
1878         __u32 offset = sizeof(*lcm) + sizeof(*lcme);
1879         int lcme_size = lov_mds_md_size(ol->ol_stripe_count, LOV_MAGIC_V1);
1880         int size = offset + lcme_size;
1881
1882         LASSERTF(buf->lb_len >= size,
1883                  "buffer len %d is less than real size %d\n",
1884                  (int)buf->lb_len, size);
1885
1886         lcm = buf->lb_buf;
1887         lcm->lcm_magic = cpu_to_le32(LOV_MAGIC_COMP_V1);
1888         lcm->lcm_size = cpu_to_le32(size);
1889         if (rec->lor_range) {
1890                 lcm->lcm_layout_gen = cpu_to_le32(rec->lor_layout_version +
1891                                                   rec->lor_range);
1892                 lcm->lcm_flags = cpu_to_le16(LCM_FL_WRITE_PENDING);
1893         } else if (rec->lor_layout_version) {
1894                 lcm->lcm_layout_gen = cpu_to_le32(rec->lor_layout_version +
1895                                                   rec->lor_range);
1896                 lcm->lcm_flags = cpu_to_le16(LCM_FL_NONE);
1897         } else {
1898                 lcm->lcm_layout_gen = cpu_to_le32(1);
1899                 lcm->lcm_flags = cpu_to_le16(LCM_FL_NONE);
1900         }
1901         lcm->lcm_entry_count = cpu_to_le16(1);
1902         /* Currently, we do not know how many mirrors will be, set it as zero
1903          * at the beginning. It will be updated when more mirrors are found. */
1904         lcm->lcm_mirror_count = 0;
1905
1906         lcme = &lcm->lcm_entries[0];
1907         lcme->lcme_id = cpu_to_le32(ol->ol_comp_id);
1908         lcme->lcme_flags = cpu_to_le32(LCME_FL_INIT);
1909         lcme->lcme_extent.e_start = cpu_to_le64(ol->ol_comp_start);
1910         lcme->lcme_extent.e_end = cpu_to_le64(ol->ol_comp_end);
1911         lcme->lcme_offset = cpu_to_le32(offset);
1912         lcme->lcme_size = cpu_to_le32(lcme_size);
1913         lcme->lcme_layout_gen = lcm->lcm_layout_gen;
1914         if (ol->ol_stripe_count > 1)
1915                 pattern |= LOV_PATTERN_F_HOLE;
1916
1917         *lmm = buf->lb_buf + offset;
1918         *objs = __lfsck_layout_new_v1_lovea(*lmm, lfsck_dto2fid(parent),
1919                                             ol->ol_stripe_size, ea_off,
1920                                             pattern, ol->ol_stripe_count);
1921
1922         return size;
1923 }
1924
1925 static void lfsck_layout_update_lcm(struct lov_comp_md_v1 *lcm,
1926                                     struct lov_comp_md_entry_v1 *lcme,
1927                                     __u32 version, __u32 range)
1928 {
1929         struct lov_comp_md_entry_v1 *tmp;
1930         __u64 start = le64_to_cpu(lcme->lcme_extent.e_start);
1931         __u64 end = le64_to_cpu(lcme->lcme_extent.e_end);
1932         __u32 gen = version + range;
1933         __u32 tmp_gen;
1934         int i;
1935         __u16 count = le16_to_cpu(lcm->lcm_entry_count);
1936         __u16 flags = le16_to_cpu(lcm->lcm_flags);
1937
1938         if (!gen)
1939                 gen = 1;
1940         lcme->lcme_layout_gen = cpu_to_le32(gen);
1941         if (le32_to_cpu(lcm->lcm_layout_gen) < gen)
1942                 lcm->lcm_layout_gen = cpu_to_le32(gen);
1943
1944         if (range)
1945                 lcm->lcm_flags = cpu_to_le16(LCM_FL_WRITE_PENDING);
1946         else if (flags == LCM_FL_NONE && le16_to_cpu(lcm->lcm_mirror_count) > 0)
1947                 lcm->lcm_flags = cpu_to_le16(LCM_FL_RDONLY);
1948
1949         for (i = 0; i < count; i++) {
1950                 tmp = &lcm->lcm_entries[i];
1951                 if (le64_to_cpu(tmp->lcme_extent.e_end) <= start)
1952                         continue;
1953
1954                 if (le64_to_cpu(tmp->lcme_extent.e_start) >= end)
1955                         continue;
1956
1957                 if (le32_to_cpu(tmp->lcme_flags) & LCME_FL_STALE)
1958                         continue;
1959
1960                 tmp_gen = le32_to_cpu(tmp->lcme_layout_gen);
1961                 /* "lcme_layout_gen == 0" but without LCME_FL_STALE flag,
1962                  * then it should be the latest version of all mirrors. */
1963                 if (tmp_gen == 0 || tmp_gen > gen) {
1964                         lcme->lcme_flags = cpu_to_le32(
1965                                 le32_to_cpu(lcme->lcme_flags) | LCME_FL_STALE);
1966                         break;
1967                 }
1968
1969                 if (tmp_gen < gen)
1970                         tmp->lcme_flags = cpu_to_le32(
1971                                 le32_to_cpu(tmp->lcme_flags) | LCME_FL_STALE);
1972         }
1973 }
1974
1975 static int lfsck_layout_add_comp(const struct lu_env *env,
1976                                  struct lfsck_instance *lfsck,
1977                                  struct thandle *handle,
1978                                  struct lu_orphan_rec_v3 *rec,
1979                                  struct dt_object *parent,
1980                                  const struct lu_fid *cfid,
1981                                  struct lu_buf *buf, __u32 ost_idx,
1982                                  __u32 ea_off, int pos, bool new_mirror)
1983 {
1984         struct ost_layout *ol = &rec->lor_layout;
1985         struct lov_comp_md_v1 *lcm = buf->lb_buf;
1986         struct lov_comp_md_entry_v1 *lcme;
1987         struct lov_mds_md_v1 *lmm;
1988         struct lov_ost_data_v1 *objs;
1989         int added = sizeof(*lcme) +
1990                     lov_mds_md_size(ol->ol_stripe_count, LOV_MAGIC_V1);
1991         int size = le32_to_cpu(lcm->lcm_size) + added;
1992         int rc;
1993         int i;
1994         __u32 offset;
1995         __u32 pattern = LOV_PATTERN_RAID0;
1996         __u16 count = le16_to_cpu(lcm->lcm_entry_count);
1997         ENTRY;
1998
1999         lu_buf_check_and_grow(buf, size);
2000         /* set the lcm again because lu_buf_check_and_grow() may
2001          * have reallocated the buf. */
2002         lcm = buf->lb_buf;
2003         lcm->lcm_size = cpu_to_le32(size);
2004         lcm->lcm_entry_count = cpu_to_le16(count + 1);
2005         if (new_mirror)
2006                 le16_add_cpu(&lcm->lcm_mirror_count, 1);
2007
2008         /* 1. Move the component bodies from [pos, count-1] to [pos+1, count]
2009          *    with distance of 'added'. */
2010         if (pos < count) {
2011                 size = 0;
2012                 for (i = pos; i < count; i++) {
2013                         lcme = &lcm->lcm_entries[i];
2014                         size += le32_to_cpu(lcme->lcme_size);
2015                 }
2016
2017                 offset = le32_to_cpu(lcm->lcm_entries[pos].lcme_offset);
2018                 memmove(buf->lb_buf + offset + added,
2019                         buf->lb_buf + offset, size);
2020         }
2021
2022         size = 0;
2023         /* 2. Move the component header [0, pos-1] to [0, pos-1] with distance
2024          *    of 'sizeof(struct lov_comp_md_entry_v1)' */
2025         if (pos > 0) {
2026                 for (i = 0; i < pos; i++) {
2027                         lcme = &lcm->lcm_entries[i];
2028                         size += le32_to_cpu(lcme->lcme_size);
2029                 }
2030
2031                 offset = le32_to_cpu(lcm->lcm_entries[0].lcme_offset);
2032                 memmove(buf->lb_buf + offset + sizeof(*lcme),
2033                         buf->lb_buf + offset, size);
2034         }
2035
2036         /* 3. Recalculate the enter offset for the component [pos, count-1] */
2037         for (i = count - 1; i >= pos; i--) {
2038                 lcm->lcm_entries[i + 1] = lcm->lcm_entries[i];
2039                 lcm->lcm_entries[i + 1].lcme_offset =
2040                         cpu_to_le32(le32_to_cpu(lcm->lcm_entries[i + 1].
2041                                                 lcme_offset) + added);
2042         }
2043
2044         /* 4. Recalculate the enter offset for the component [0, pos) */
2045         for (i = 0; i < pos; i++) {
2046                 lcm->lcm_entries[i].lcme_offset =
2047                         cpu_to_le32(le32_to_cpu(lcm->lcm_entries[i].
2048                                                 lcme_offset) + sizeof(*lcme));
2049         }
2050
2051         offset = sizeof(*lcm) + sizeof(*lcme) * (count + 1) + size;
2052         /* 4. Insert the new component header (entry) at the slot 'pos'. */
2053         lcme = &lcm->lcm_entries[pos];
2054         lcme->lcme_id = cpu_to_le32(ol->ol_comp_id);
2055         lcme->lcme_flags = cpu_to_le32(LCME_FL_INIT);
2056         lcme->lcme_extent.e_start = cpu_to_le64(ol->ol_comp_start);
2057         lcme->lcme_extent.e_end = cpu_to_le64(ol->ol_comp_end);
2058         lcme->lcme_offset = cpu_to_le32(offset);
2059         lcme->lcme_size = cpu_to_le32(lov_mds_md_size(ol->ol_stripe_count,
2060                                                       LOV_MAGIC_V1));
2061
2062         if (ol->ol_stripe_count > 1)
2063                 pattern |= LOV_PATTERN_F_HOLE;
2064
2065         lmm = buf->lb_buf + offset;
2066         /* 5. Insert teh new component body at the 'offset'. */
2067         objs = __lfsck_layout_new_v1_lovea(lmm, lfsck_dto2fid(parent),
2068                                            ol->ol_stripe_size, ea_off,
2069                                            pattern, ol->ol_stripe_count);
2070
2071         /* 6. Update mirror related flags and version. */
2072         lfsck_layout_update_lcm(lcm, lcme, rec->lor_layout_version,
2073                                 rec->lor_range);
2074
2075         rc = lfsck_layout_refill_lovea(env, lfsck, handle, parent, cfid, buf,
2076                                        lmm, objs, LU_XATTR_REPLACE, ost_idx,
2077                                        le32_to_cpu(lcm->lcm_size));
2078
2079         CDEBUG(D_LFSCK, "%s: layout LFSCK assistant add new COMP for "
2080                DFID": parent "DFID", OST-index %u, stripe-index %u, "
2081                "stripe_size %u, stripe_count %u, comp_id %u, comp_start %llu, "
2082                "comp_end %llu, layout version %u, range %u, "
2083                "%s LOV EA hole: rc = %d\n",
2084                lfsck_lfsck2name(lfsck), PFID(cfid), PFID(lfsck_dto2fid(parent)),
2085                ost_idx, ea_off, ol->ol_stripe_size, ol->ol_stripe_count,
2086                ol->ol_comp_id, ol->ol_comp_start, ol->ol_comp_end,
2087                rec->lor_layout_version, rec->lor_range,
2088                le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_HOLE ?
2089                "with" : "without", rc);
2090
2091         RETURN(rc);
2092 }
2093
2094 static int lfsck_layout_extend_v1v3_lovea(const struct lu_env *env,
2095                                           struct lfsck_instance *lfsck,
2096                                           struct thandle *handle,
2097                                           struct ost_layout *ol,
2098                                           struct dt_object *parent,
2099                                           const struct lu_fid *cfid,
2100                                           struct lu_buf *buf, __u32 ost_idx,
2101                                           __u32 ea_off)
2102 {
2103         struct lov_mds_md_v1 *lmm = buf->lb_buf;
2104         struct lov_ost_data_v1 *objs;
2105         __u16 count = le16_to_cpu(lmm->lmm_stripe_count);
2106         __u32 magic = le32_to_cpu(lmm->lmm_magic);
2107         int size;
2108         int gap;
2109         int rc;
2110         ENTRY;
2111
2112         /* The original LOVEA maybe re-generated via old filter_fid, at
2113          * that time, we do not know the stripe count and stripe size. */
2114         if (ol->ol_stripe_count > count)
2115                 count = ol->ol_stripe_count;
2116         if (ol->ol_stripe_size != 0 &&
2117             ol->ol_stripe_size != le32_to_cpu(lmm->lmm_stripe_size))
2118                 lmm->lmm_stripe_size = cpu_to_le32(ol->ol_stripe_size);
2119
2120         if (magic == LOV_MAGIC_V1)
2121                 objs = &lmm->lmm_objects[count];
2122         else
2123                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[count];
2124
2125         gap = ea_off - count;
2126         if (gap >= 0)
2127                 count = ea_off + 1;
2128
2129         size = lov_mds_md_size(count, magic);
2130         LASSERTF(buf->lb_len >= size,
2131                  "buffer len %d is less than real size %d\n",
2132                  (int)buf->lb_len, size);
2133
2134         if (gap > 0) {
2135                 memset(objs, 0, gap * sizeof(*objs));
2136                 lmm->lmm_pattern |= cpu_to_le32(LOV_PATTERN_F_HOLE);
2137         }
2138
2139         lmm->lmm_layout_gen = cpu_to_le16(le16_to_cpu(lmm->lmm_layout_gen) + 1);
2140         lmm->lmm_stripe_count = cpu_to_le16(count);
2141         objs += gap;
2142
2143         rc = lfsck_layout_refill_lovea(env, lfsck, handle, parent, cfid, buf,
2144                                 lmm, objs, LU_XATTR_REPLACE, ost_idx, size);
2145
2146         CDEBUG(D_LFSCK, "%s: layout LFSCK assistant extend layout EA for "
2147                DFID": parent "DFID", OST-index %u, stripe-index %u, "
2148                "stripe_size %u, stripe_count %u, comp_id %u, comp_start %llu, "
2149                "comp_end %llu, %s LOV EA hole: rc = %d\n",
2150                lfsck_lfsck2name(lfsck), PFID(cfid), PFID(lfsck_dto2fid(parent)),
2151                ost_idx, ea_off, ol->ol_stripe_size, ol->ol_stripe_count,
2152                ol->ol_comp_id, ol->ol_comp_start, ol->ol_comp_end,
2153                le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_HOLE ?
2154                "with" : "without", rc);
2155
2156         RETURN(rc);
2157 }
2158
2159 /**
2160  * \retval       +1: repaired
2161  * \retval        0: did nothing
2162  * \retval      -ve: on error
2163  */
2164 static int lfsck_layout_update_lovea(const struct lu_env *env,
2165                                      struct lfsck_instance *lfsck,
2166                                      struct thandle *handle,
2167                                      struct lu_orphan_rec_v3 *rec,
2168                                      struct dt_object *parent,
2169                                      const struct lu_fid *cfid,
2170                                      struct lu_buf *buf, int fl,
2171                                      __u32 ost_idx, __u32 ea_off)
2172 {
2173         struct ost_layout *ol = &rec->lor_layout;
2174         struct lov_mds_md_v1 *lmm = NULL;
2175         struct lov_ost_data_v1 *objs = NULL;
2176         int rc = 0;
2177         ENTRY;
2178
2179         if (ol->ol_comp_id != 0)
2180                 rc = lfsck_layout_new_comp_lovea(env, rec, parent, buf, ea_off,
2181                                                  &lmm, &objs);
2182         else
2183                 rc = lfsck_layout_new_v1_lovea(env, lfsck, &rec->lor_layout,
2184                                                parent, buf, ea_off, &lmm,
2185                                                &objs);
2186         if (rc > 0)
2187                 rc = lfsck_layout_refill_lovea(env, lfsck, handle, parent, cfid,
2188                                                buf, lmm, objs, fl, ost_idx, rc);
2189
2190         CDEBUG(D_LFSCK, "%s: layout LFSCK assistant created layout EA for "
2191                DFID": parent "DFID", OST-index %u, stripe-index %u, "
2192                "stripe_size %u, stripe_count %u, comp_id %u, comp_start %llu, "
2193                "comp_end %llu, layout version %u, range %u, fl %d, "
2194                "%s LOV EA hole: rc = %d\n",
2195                lfsck_lfsck2name(lfsck), PFID(cfid), PFID(lfsck_dto2fid(parent)),
2196                ost_idx, ea_off, ol->ol_stripe_size, ol->ol_stripe_count,
2197                ol->ol_comp_id, ol->ol_comp_start, ol->ol_comp_end,
2198                rec->lor_layout_version, rec->lor_range, fl,
2199                le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_HOLE ?
2200                "with" : "without", rc);
2201
2202         RETURN(rc);
2203 }
2204
2205 static int __lfsck_layout_update_pfid(const struct lu_env *env,
2206                                       struct lfsck_component *com,
2207                                       struct dt_object *child,
2208                                       const struct lu_fid *pfid,
2209                                       const struct ost_layout *ol, __u32 offset,
2210                                       __u32 version, __u32 range)
2211 {
2212         struct dt_device        *dev    = lfsck_obj2dev(child);
2213         struct filter_fid       *ff     = &lfsck_env_info(env)->lti_ff;
2214         struct thandle          *handle;
2215         struct lu_buf            buf    = { NULL };
2216         int                      rc;
2217
2218         ff->ff_parent.f_seq = cpu_to_le64(pfid->f_seq);
2219         ff->ff_parent.f_oid = cpu_to_le32(pfid->f_oid);
2220         /* Currently, the filter_fid::ff_parent::f_ver is not the real parent
2221          * MDT-object's FID::f_ver, instead it is the OST-object index in its
2222          * parent MDT-object's layout EA. */
2223         ff->ff_parent.f_stripe_idx = cpu_to_le32(offset);
2224         ost_layout_cpu_to_le(&ff->ff_layout, ol);
2225         ff->ff_layout_version = cpu_to_le32(version);
2226         ff->ff_range = cpu_to_le32(range);
2227         lfsck_buf_init(&buf, ff, sizeof(*ff));
2228
2229         handle = lfsck_trans_create(env, dev, com->lc_lfsck);
2230         if (IS_ERR(handle))
2231                 RETURN(PTR_ERR(handle));
2232
2233         rc = dt_declare_xattr_set(env, child, &buf, XATTR_NAME_FID, 0, handle);
2234         if (rc != 0)
2235                 GOTO(stop, rc);
2236
2237         rc = dt_trans_start_local(env, dev, handle);
2238         if (rc != 0)
2239                 GOTO(stop, rc);
2240
2241         rc = dt_xattr_set(env, child, &buf, XATTR_NAME_FID, 0, handle);
2242
2243         GOTO(stop, rc);
2244
2245 stop:
2246         dt_trans_stop(env, dev, handle);
2247
2248         return rc;
2249 }
2250
2251 /**
2252  * \retval       +1: repaired
2253  * \retval        0: did nothing
2254  * \retval      -ve: on error
2255  */
2256 static int lfsck_layout_update_pfid(const struct lu_env *env,
2257                                     struct lfsck_component *com,
2258                                     struct dt_object *parent,
2259                                     struct lu_fid *cfid,
2260                                     struct dt_device *cdev,
2261                                     struct lu_orphan_rec_v3 *rec, __u32 ea_off)
2262 {
2263         struct dt_object        *child;
2264         int                      rc     = 0;
2265         ENTRY;
2266
2267         child = lfsck_object_find_by_dev(env, cdev, cfid);
2268         if (IS_ERR(child))
2269                 RETURN(PTR_ERR(child));
2270
2271         rc = __lfsck_layout_update_pfid(env, com, child,
2272                                         lu_object_fid(&parent->do_lu),
2273                                         &rec->lor_layout, ea_off,
2274                                         rec->lor_layout_version,
2275                                         rec->lor_range);
2276         lfsck_object_put(env, child);
2277
2278         RETURN(rc == 0 ? 1 : rc);
2279 }
2280
2281 static int lfsck_lovea_size(struct ost_layout *ol, __u32 ea_off)
2282 {
2283         if (ol->ol_comp_id != 0)
2284                 return sizeof(struct lov_comp_md_v1) +
2285                        sizeof(struct lov_comp_md_entry_v1) +
2286                        lov_mds_md_size(ol->ol_stripe_count, LOV_MAGIC_V1);
2287
2288         if (ol->ol_stripe_count != 0)
2289                 return lov_mds_md_size(ol->ol_stripe_count, LOV_MAGIC_V1);
2290
2291         return lov_mds_md_size(ea_off + 1, LOV_MAGIC_V1);
2292 }
2293
2294 /**
2295  * This function will create the MDT-object with the given (partial) LOV EA.
2296  *
2297  * Under some data corruption cases, the MDT-object of the file may be lost,
2298  * but its OST-objects, or some of them are there. The layout LFSCK needs to
2299  * re-create the MDT-object with the orphan OST-object(s) information.
2300  *
2301  * On the other hand, the LFSCK may has created some OST-object for repairing
2302  * dangling LOV EA reference, but as the LFSCK processing, it may find that
2303  * the old OST-object is there and should replace the former new created OST
2304  * object. Unfortunately, some others have modified such newly created object.
2305  * To keep the data (both new and old), the LFSCK will create MDT-object with
2306  * new FID to reference the original OST-object.
2307  *
2308  * \param[in] env       pointer to the thread context
2309  * \param[in] com       pointer to the lfsck component
2310  * \param[in] ltd       pointer to target device descriptor
2311  * \param[in] rec       pointer to the record for the orphan OST-object
2312  * \param[in] cfid      pointer to FID for the orphan OST-object
2313  * \param[in] infix     additional information, such as the FID for original
2314  *                      MDT-object and the stripe offset in the LOV EA
2315  * \param[in] type      the type for describing why the orphan MDT-object is
2316  *                      created. The rules are as following:
2317  *
2318  *  type "C":           Multiple OST-objects claim the same MDT-object and the
2319  *                      same slot in the layout EA. Then the LFSCK will create
2320  *                      new MDT-object(s) to hold the conflict OST-object(s).
2321  *
2322  *  type "N":           The orphan OST-object does not know which one was the
2323  *                      real parent MDT-object, so the LFSCK uses new FID for
2324  *                      its parent MDT-object.
2325  *
2326  *  type "R":           The orphan OST-object knows its parent MDT-object FID,
2327  *                      but does not know the position (the file name) in the
2328  *                      layout.
2329  *
2330  *  type "D":           The MDT-object is a directory, it may knows its parent
2331  *                      but because there is no valid linkEA, the LFSCK cannot
2332  *                      know where to put it back to the namespace.
2333  *  type "O":           The MDT-object has no linkEA, and there is no name
2334  *                      entry that references the MDT-object.
2335  *
2336  *  type "P":           The orphan object to be created was a parent directory
2337  *                      of some MDT-object which linkEA shows that the @orphan
2338  *                      object is missing.
2339  *
2340  * The orphan name will be like:
2341  * ${FID}-${infix}-${type}-${conflict_version}
2342  *
2343  * \param[in] ea_off    the stripe offset in the LOV EA
2344  *
2345  * \retval              positive on repaired something
2346  * \retval              0 if needs to repair nothing
2347  * \retval              negative error number on failure
2348  */
2349 static int lfsck_layout_recreate_parent(const struct lu_env *env,
2350                                         struct lfsck_component *com,
2351                                         struct lfsck_tgt_desc *ltd,
2352                                         struct lu_orphan_rec_v3 *rec,
2353                                         struct lu_fid *cfid,
2354                                         const char *infix,
2355                                         const char *type,
2356                                         __u32 ea_off)
2357 {
2358         struct lfsck_thread_info        *info   = lfsck_env_info(env);
2359         struct dt_insert_rec            *dtrec  = &info->lti_dt_rec;
2360         char                            *name   = info->lti_key;
2361         struct lu_attr                  *la     = &info->lti_la2;
2362         struct dt_object_format         *dof    = &info->lti_dof;
2363         struct lfsck_instance           *lfsck  = com->lc_lfsck;
2364         struct lu_fid                   *pfid   = &rec->lor_rec.lor_fid;
2365         struct lu_fid                   *tfid   = &info->lti_fid3;
2366         struct dt_device                *dev    = lfsck->li_bottom;
2367         struct dt_object                *lpf    = lfsck->li_lpf_obj;
2368         struct dt_object                *pobj   = NULL;
2369         struct dt_object                *cobj   = NULL;
2370         struct thandle                  *th     = NULL;
2371         struct lu_buf                   *ea_buf = &info->lti_big_buf;
2372         struct lu_buf                    lov_buf;
2373         struct lfsck_lock_handle        *llh    = &info->lti_llh;
2374         struct linkea_data               ldata  = { NULL };
2375         struct lu_buf                    linkea_buf;
2376         const struct lu_name            *pname;
2377         int                              size   = 0;
2378         int                              idx    = 0;
2379         int                              rc     = 0;
2380         ENTRY;
2381
2382         if (lfsck_is_dryrun(lfsck))
2383                 GOTO(log, rc = 0);
2384
2385         if (unlikely(lpf == NULL))
2386                 GOTO(log, rc = -ENXIO);
2387
2388         /* We use two separated transactions to repair the inconsistency.
2389          *
2390          * 1) create the MDT-object locally.
2391          * 2) update the OST-object's PFID EA if necessary.
2392          *
2393          * If 1) succeed, but 2) failed, then the OST-object's PFID EA will be
2394          * updated when the layout LFSCK run next time.
2395          *
2396          * If 1) failed, but 2) succeed, then such MDT-object will be re-created
2397          * when the layout LFSCK run next time. */
2398
2399         if (fid_is_zero(pfid)) {
2400                 rc = lfsck_fid_alloc(env, lfsck, pfid, false);
2401                 if (rc != 0)
2402                         GOTO(log, rc);
2403
2404                 cobj = lfsck_object_find_by_dev(env, ltd->ltd_tgt, cfid);
2405                 if (IS_ERR(cobj))
2406                         GOTO(log, rc = PTR_ERR(cobj));
2407         }
2408
2409         pobj = lfsck_object_find_by_dev(env, dev, pfid);
2410         if (IS_ERR(pobj))
2411                 GOTO(log, rc = PTR_ERR(pobj));
2412
2413         LASSERT(infix != NULL);
2414         LASSERT(type != NULL);
2415
2416         memset(la, 0, sizeof(*la));
2417         la->la_uid = rec->lor_rec.lor_uid;
2418         la->la_gid = rec->lor_rec.lor_gid;
2419         la->la_mode = S_IFREG | S_IRUSR;
2420         la->la_valid = LA_MODE | LA_UID | LA_GID;
2421
2422         memset(dof, 0, sizeof(*dof));
2423         dof->dof_type = dt_mode_to_dft(S_IFREG);
2424         /* Because the dof->dof_reg.striped = 0, the LOD will not create
2425          * the stripe(s). The LFSCK will specify the LOV EA via
2426          * lfsck_layout_update_lovea(). */
2427
2428         size = lfsck_lovea_size(&rec->lor_layout, ea_off);
2429         if (ea_buf->lb_len < size) {
2430                 lu_buf_realloc(ea_buf, size);
2431                 if (ea_buf->lb_buf == NULL)
2432                         GOTO(log, rc = -ENOMEM);
2433         }
2434
2435 again:
2436         do {
2437                 snprintf(name, NAME_MAX, DFID"%s-%s-%d", PFID(pfid), infix,
2438                          type, idx++);
2439                 rc = dt_lookup_dir(env, lfsck->li_lpf_obj, name, tfid);
2440                 if (rc != 0 && rc != -ENOENT)
2441                         GOTO(log, rc);
2442         } while (rc == 0);
2443
2444         rc = lfsck_lock(env, lfsck, lfsck->li_lpf_obj, name, llh,
2445                         MDS_INODELOCK_UPDATE, LCK_PW);
2446         if (rc != 0)
2447                 GOTO(log, rc);
2448
2449         /* Re-check whether the name conflict with othrs after taken
2450          * the ldlm lock. */
2451         rc = dt_lookup_dir(env, lfsck->li_lpf_obj, name, tfid);
2452         if (unlikely(rc == 0)) {
2453                 lfsck_unlock(llh);
2454                 goto again;
2455         }
2456
2457         if (rc != -ENOENT)
2458                 GOTO(unlock, rc);
2459
2460         pname = lfsck_name_get_const(env, name, strlen(name));
2461         rc = linkea_links_new(&ldata, &lfsck_env_info(env)->lti_linkea_buf,
2462                               pname, lfsck_dto2fid(lfsck->li_lpf_obj));
2463         if (rc != 0)
2464                 GOTO(unlock, rc);
2465
2466         /* The 1st transaction. */
2467         th = lfsck_trans_create(env, dev, lfsck);
2468         if (IS_ERR(th))
2469                 GOTO(unlock, rc = PTR_ERR(th));
2470
2471         rc = dt_declare_create(env, pobj, la, NULL, dof, th);
2472         if (rc != 0)
2473                 GOTO(stop, rc);
2474
2475         lfsck_buf_init(&lov_buf, ea_buf->lb_buf, size);
2476         rc = dt_declare_xattr_set(env, pobj, &lov_buf, XATTR_NAME_LOV,
2477                                   LU_XATTR_CREATE, th);
2478         if (rc != 0)
2479                 GOTO(stop, rc);
2480
2481         dtrec->rec_fid = pfid;
2482         dtrec->rec_type = S_IFREG;
2483         rc = dt_declare_insert(env, lpf,
2484                                (const struct dt_rec *)dtrec,
2485                                (const struct dt_key *)name, th);
2486         if (rc != 0)
2487                 GOTO(stop, rc);
2488
2489         lfsck_buf_init(&linkea_buf, ldata.ld_buf->lb_buf,
2490                        ldata.ld_leh->leh_len);
2491         rc = dt_declare_xattr_set(env, pobj, &linkea_buf,
2492                                   XATTR_NAME_LINK, 0, th);
2493         if (rc != 0)
2494                 GOTO(stop, rc);
2495
2496         rc = dt_trans_start_local(env, dev, th);
2497         if (rc != 0)
2498                 GOTO(stop, rc);
2499
2500         dt_write_lock(env, pobj, 0);
2501         rc = dt_create(env, pobj, la, NULL, dof, th);
2502         if (rc == 0)
2503                 rc = lfsck_layout_update_lovea(env, lfsck, th, rec, pobj, cfid,
2504                         &lov_buf, LU_XATTR_CREATE, ltd->ltd_index, ea_off);
2505         dt_write_unlock(env, pobj);
2506         if (rc < 0)
2507                 GOTO(stop, rc);
2508
2509         rc = dt_insert(env, lpf, (const struct dt_rec *)dtrec,
2510                        (const struct dt_key *)name, th);
2511         if (rc != 0)
2512                 GOTO(stop, rc);
2513
2514         rc = dt_xattr_set(env, pobj, &linkea_buf, XATTR_NAME_LINK, 0, th);
2515         if (rc == 0 && cobj != NULL) {
2516                 dt_trans_stop(env, dev, th);
2517                 th = NULL;
2518
2519                 /* The 2nd transaction. */
2520                 rc = __lfsck_layout_update_pfid(env, com, cobj, pfid,
2521                                                 &rec->lor_layout, ea_off,
2522                                                 rec->lor_layout_version,
2523                                                 rec->lor_range);
2524         }
2525
2526         GOTO(stop, rc);
2527
2528 stop:
2529         if (th != NULL)
2530                 dt_trans_stop(env, dev, th);
2531
2532 unlock:
2533         lfsck_unlock(llh);
2534
2535 log:
2536         if (cobj != NULL && !IS_ERR(cobj))
2537                 lfsck_object_put(env, cobj);
2538         if (pobj != NULL && !IS_ERR(pobj))
2539                 lfsck_object_put(env, pobj);
2540
2541         if (rc < 0)
2542                 CDEBUG(D_LFSCK, "%s layout LFSCK assistant failed to "
2543                        "recreate the lost MDT-object: parent "DFID
2544                        ", child "DFID", OST-index %u, stripe-index %u, "
2545                        "infix %s, type %s: rc = %d\n",
2546                        lfsck_lfsck2name(lfsck), PFID(pfid), PFID(cfid),
2547                        ltd->ltd_index, ea_off, infix, type, rc);
2548
2549         return rc >= 0 ? 1 : rc;
2550 }
2551
2552 static int lfsck_layout_master_conditional_destroy(const struct lu_env *env,
2553                                                    struct lfsck_component *com,
2554                                                    const struct lu_fid *fid,
2555                                                    __u32 index)
2556 {
2557         struct lfsck_thread_info *info  = lfsck_env_info(env);
2558         struct lfsck_request     *lr    = &info->lti_lr;
2559         struct lfsck_instance    *lfsck = com->lc_lfsck;
2560         struct lfsck_tgt_desc    *ltd;
2561         struct ptlrpc_request    *req;
2562         struct lfsck_request     *tmp;
2563         struct obd_export        *exp;
2564         int                       rc    = 0;
2565         ENTRY;
2566
2567         ltd = lfsck_tgt_get(&lfsck->li_ost_descs, index);
2568         if (unlikely(ltd == NULL))
2569                 RETURN(-ENXIO);
2570
2571         exp = ltd->ltd_exp;
2572         if (!(exp_connect_flags(exp) & OBD_CONNECT_LFSCK))
2573                 GOTO(put, rc = -EOPNOTSUPP);
2574
2575         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LFSCK_NOTIFY);
2576         if (req == NULL)
2577                 GOTO(put, rc = -ENOMEM);
2578
2579         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, LFSCK_NOTIFY);
2580         if (rc != 0) {
2581                 ptlrpc_request_free(req);
2582
2583                 GOTO(put, rc);
2584         }
2585
2586         memset(lr, 0, sizeof(*lr));
2587         lr->lr_event = LE_CONDITIONAL_DESTROY;
2588         lr->lr_active = LFSCK_TYPE_LAYOUT;
2589         lr->lr_fid = *fid;
2590
2591         tmp = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
2592         *tmp = *lr;
2593         ptlrpc_request_set_replen(req);
2594
2595         rc = ptlrpc_queue_wait(req);
2596         ptlrpc_req_finished(req);
2597
2598         GOTO(put, rc);
2599
2600 put:
2601         lfsck_tgt_put(ltd);
2602
2603         return rc;
2604 }
2605
2606 static int lfsck_layout_slave_conditional_destroy(const struct lu_env *env,
2607                                                   struct lfsck_component *com,
2608                                                   struct lfsck_request *lr)
2609 {
2610         struct lfsck_thread_info        *info   = lfsck_env_info(env);
2611         struct lu_attr                  *la     = &info->lti_la;
2612         union ldlm_policy_data          *policy = &info->lti_policy;
2613         struct ldlm_res_id              *resid  = &info->lti_resid;
2614         struct lfsck_instance           *lfsck  = com->lc_lfsck;
2615         struct dt_device                *dev    = lfsck->li_bottom;
2616         struct lu_fid                   *fid    = &lr->lr_fid;
2617         struct dt_object                *obj;
2618         struct thandle                  *th     = NULL;
2619         struct lustre_handle             lh     = { 0 };
2620         __u64                            flags  = 0;
2621         int                              rc     = 0;
2622         ENTRY;
2623
2624         obj = lfsck_object_find_by_dev(env, dev, fid);
2625         if (IS_ERR(obj))
2626                 RETURN(PTR_ERR(obj));
2627
2628         dt_read_lock(env, obj, 0);
2629         if (dt_object_exists(obj) == 0 ||
2630             lfsck_is_dead_obj(obj)) {
2631                 dt_read_unlock(env, obj);
2632
2633                 GOTO(put, rc = -ENOENT);
2634         }
2635
2636         /* Get obj's attr without lock firstly. */
2637         rc = dt_attr_get(env, obj, la);
2638         dt_read_unlock(env, obj);
2639         if (rc != 0)
2640                 GOTO(put, rc);
2641
2642         if (likely(la->la_ctime != 0 || la->la_mode & S_ISUID))
2643                 GOTO(put, rc = -ETXTBSY);
2644
2645         /* Acquire extent lock on [0, EOF] to sync with all possible written. */
2646         LASSERT(lfsck->li_namespace != NULL);
2647
2648         memset(policy, 0, sizeof(*policy));
2649         policy->l_extent.end = OBD_OBJECT_EOF;
2650         ost_fid_build_resid(fid, resid);
2651         rc = ldlm_cli_enqueue_local(env, lfsck->li_namespace, resid,
2652                                     LDLM_EXTENT, policy, LCK_EX, &flags,
2653                                     ldlm_blocking_ast, ldlm_completion_ast,
2654                                     NULL, NULL, 0, LVB_T_NONE, NULL, &lh);
2655         if (rc != ELDLM_OK)
2656                 GOTO(put, rc = -EIO);
2657
2658         dt_write_lock(env, obj, 0);
2659         /* Get obj's attr within lock again. */
2660         rc = dt_attr_get(env, obj, la);
2661         if (rc != 0)
2662                 GOTO(unlock, rc);
2663
2664         if (la->la_ctime != 0)
2665                 GOTO(unlock, rc = -ETXTBSY);
2666
2667         th = lfsck_trans_create(env, dev, lfsck);
2668         if (IS_ERR(th))
2669                 GOTO(unlock, rc = PTR_ERR(th));
2670
2671         rc = dt_declare_ref_del(env, obj, th);
2672         if (rc != 0)
2673                 GOTO(stop, rc);
2674
2675         rc = dt_declare_destroy(env, obj, th);
2676         if (rc != 0)
2677                 GOTO(stop, rc);
2678
2679         rc = dt_trans_start_local(env, dev, th);
2680         if (rc != 0)
2681                 GOTO(stop, rc);
2682
2683         rc = dt_ref_del(env, obj, th);
2684         if (rc != 0)
2685                 GOTO(stop, rc);
2686
2687         rc = dt_destroy(env, obj, th);
2688         if (rc == 0)
2689                 CDEBUG(D_LFSCK, "%s: layout LFSCK destroyed the empty "
2690                        "OST-object "DFID" that was created for reparing "
2691                        "dangling referenced case. But the original missing "
2692                        "OST-object is found now.\n",
2693                        lfsck_lfsck2name(lfsck), PFID(fid));
2694
2695         GOTO(stop, rc);
2696
2697 stop:
2698         dt_trans_stop(env, dev, th);
2699
2700 unlock:
2701         dt_write_unlock(env, obj);
2702         ldlm_lock_decref(&lh, LCK_EX);
2703
2704 put:
2705         lfsck_object_put(env, obj);
2706
2707         return rc;
2708 }
2709
2710 /**
2711  * Some OST-object has occupied the specified layout EA slot.
2712  * Such OST-object may be generated by the LFSCK when repair
2713  * dangling referenced MDT-object, which can be indicated by
2714  * attr::la_ctime == 0 but without S_ISUID in la_mode. If it
2715  * is true and such OST-object has not been modified yet, we
2716  * will replace it with the orphan OST-object; otherwise the
2717  * LFSCK will create new MDT-object to reference the orphan.
2718  *
2719  * \retval       +1: repaired
2720  * \retval        0: did nothing
2721  * \retval      -ve: on error
2722  */
2723 static int lfsck_layout_conflict_create(const struct lu_env *env,
2724                                         struct lfsck_component *com,
2725                                         struct lfsck_tgt_desc *ltd,
2726                                         struct lu_orphan_rec_v3 *rec,
2727                                         struct dt_object *parent,
2728                                         struct lu_fid *cfid,
2729                                         struct lu_buf *ea_buf,
2730                                         struct lov_mds_md_v1 *lmm,
2731                                         struct lov_ost_data_v1 *slot,
2732                                         __u32 ea_off, int lovea_size)
2733 {
2734         struct lfsck_thread_info *info          = lfsck_env_info(env);
2735         struct lu_fid            *cfid2         = &info->lti_fid2;
2736         struct ost_id            *oi            = &info->lti_oi;
2737         struct dt_device         *dev           = lfsck_obj2dev(parent);
2738         struct thandle           *th            = NULL;
2739         struct lustre_handle      lh            = { 0 };
2740         __u32                     ost_idx2      = le32_to_cpu(slot->l_ost_idx);
2741         int                       rc            = 0;
2742         ENTRY;
2743
2744         while (CFS_FAIL_TIMEOUT(OBD_FAIL_LFSCK_DELAY3, cfs_fail_val)) {
2745                 if (unlikely(!thread_is_running(&com->lc_lfsck->li_thread)))
2746                         RETURN(0);
2747         }
2748
2749         ostid_le_to_cpu(&slot->l_ost_oi, oi);
2750         rc = ostid_to_fid(cfid2, oi, ost_idx2);
2751         if (rc != 0)
2752                 GOTO(out, rc);
2753
2754         rc = lfsck_ibits_lock(env, com->lc_lfsck, parent, &lh,
2755                               MDS_INODELOCK_LAYOUT | MDS_INODELOCK_XATTR,
2756                               LCK_EX);
2757         if (rc != 0)
2758                 GOTO(out, rc);
2759
2760         rc = lfsck_layout_master_conditional_destroy(env, com, cfid2, ost_idx2);
2761
2762         /* If the conflict OST-obejct is not created for fixing dangling
2763          * referenced MDT-object in former LFSCK check/repair, or it has
2764          * been modified by others, then we cannot destroy it. Re-create
2765          * a new MDT-object for the orphan OST-object. */
2766         if (rc == -ETXTBSY) {
2767                 /* No need the layout lock on the original parent. */
2768                 lfsck_ibits_unlock(&lh, LCK_EX);
2769
2770                 fid_zero(&rec->lor_rec.lor_fid);
2771                 snprintf(info->lti_tmpbuf, sizeof(info->lti_tmpbuf),
2772                          "-"DFID"-%x", PFID(lu_object_fid(&parent->do_lu)),
2773                          ea_off);
2774                 rc = lfsck_layout_recreate_parent(env, com, ltd, rec, cfid,
2775                                                 info->lti_tmpbuf, "C", ea_off);
2776
2777                 RETURN(rc);
2778         }
2779
2780         if (rc != 0 && rc != -ENOENT)
2781                 GOTO(unlock, rc);
2782
2783         if (lfsck_is_dryrun(com->lc_lfsck))
2784                 GOTO(unlock, rc = 0);
2785
2786         th = lfsck_trans_create(env, dev, com->lc_lfsck);
2787         if (IS_ERR(th))
2788                 GOTO(unlock, rc = PTR_ERR(th));
2789
2790         rc = dt_declare_xattr_set(env, parent, ea_buf, XATTR_NAME_LOV,
2791                                   LU_XATTR_REPLACE, th);
2792         if (rc != 0)
2793                 GOTO(stop, rc);
2794
2795         rc = dt_trans_start_local(env, dev, th);
2796         if (rc != 0)
2797                 GOTO(stop, rc);
2798
2799         dt_write_lock(env, parent, 0);
2800         lmm->lmm_layout_gen = cpu_to_le16(le16_to_cpu(lmm->lmm_layout_gen) + 1);
2801         rc = lfsck_layout_refill_lovea(env, com->lc_lfsck, th, parent, cfid,
2802                                        ea_buf, lmm, slot, LU_XATTR_REPLACE,
2803                                        ltd->ltd_index, lovea_size);
2804         dt_write_unlock(env, parent);
2805
2806         GOTO(stop, rc);
2807
2808 stop:
2809         dt_trans_stop(env, dev, th);
2810
2811 unlock:
2812         lfsck_ibits_unlock(&lh, LCK_EX);
2813
2814 out:
2815         CDEBUG(D_LFSCK, "%s: layout LFSCK assistant replaced the conflict "
2816                "OST-object "DFID" on the OST %x with the orphan "DFID" on "
2817                "the OST %x: parent "DFID", stripe-index %u: rc = %d\n",
2818                lfsck_lfsck2name(com->lc_lfsck), PFID(cfid2), ost_idx2,
2819                PFID(cfid), ltd->ltd_index, PFID(lfsck_dto2fid(parent)),
2820                ea_off, rc);
2821
2822         return rc >= 0 ? 1 : rc;
2823 }
2824
2825 /**
2826  * \retval       +1: repaired
2827  * \retval        0: did nothing
2828  * \retval      -ve: on error
2829  */
2830 static int lfsck_layout_recreate_lovea(const struct lu_env *env,
2831                                        struct lfsck_component *com,
2832                                        struct lfsck_tgt_desc *ltd,
2833                                        struct lu_orphan_rec_v3 *rec,
2834                                        struct dt_object *parent,
2835                                        struct lu_fid *cfid,
2836                                        __u32 ost_idx, __u32 ea_off)
2837 {
2838         struct lfsck_thread_info *info          = lfsck_env_info(env);
2839         struct lu_buf            *buf           = &info->lti_big_buf;
2840         struct lu_fid            *fid           = &info->lti_fid2;
2841         struct ost_id            *oi            = &info->lti_oi;
2842         struct lfsck_instance    *lfsck         = com->lc_lfsck;
2843         struct dt_device         *dt            = lfsck_obj2dev(parent);
2844         struct lfsck_bookmark    *bk            = &lfsck->li_bookmark_ram;
2845         struct ost_layout        *ol            = &rec->lor_layout;
2846         struct lov_comp_md_v1    *lcm           = NULL;
2847         struct lov_comp_md_entry_v1 *lcme       = NULL;
2848         struct thandle           *handle        = NULL;
2849         size_t                    lovea_size;
2850         struct lov_mds_md_v1     *lmm;
2851         struct lov_ost_data_v1   *objs;
2852         struct lustre_handle      lh            = { 0 };
2853         __u32                     magic;
2854         __u32 flags = 0;
2855         int                       fl            = 0;
2856         int                       rc            = 0;
2857         int                       rc1;
2858         int                       i;
2859         int pos = 0;
2860         __u16 count;
2861         bool locked = false;
2862         bool new_mirror = true;
2863         ENTRY;
2864
2865         if (lfsck_is_dryrun(lfsck))
2866                 RETURN(0);
2867
2868         rc = lfsck_ibits_lock(env, lfsck, parent, &lh,
2869                               MDS_INODELOCK_LAYOUT | MDS_INODELOCK_XATTR,
2870                               LCK_EX);
2871         if (rc != 0) {
2872                 CDEBUG(D_LFSCK, "%s: layout LFSCK assistant failed to recreate "
2873                        "LOV EA for "DFID": parent "DFID", OST-index %u, "
2874                        "stripe-index %u, comp_id %u, comp_start %llu, "
2875                        "comp_end %llu, layout version %u, range %u: rc = %d\n",
2876                        lfsck_lfsck2name(lfsck), PFID(cfid),
2877                        PFID(lfsck_dto2fid(parent)), ost_idx, ea_off,
2878                        ol->ol_comp_id, ol->ol_comp_start,
2879                        ol->ol_comp_end, rec->lor_layout_version,
2880                        rec->lor_range, rc);
2881
2882                 RETURN(rc);
2883         }
2884
2885 again:
2886         if (locked) {
2887                 dt_write_unlock(env, parent);
2888                 locked = false;
2889         }
2890
2891         if (handle != NULL) {
2892                 dt_trans_stop(env, dt, handle);
2893                 handle = NULL;
2894         }
2895
2896         if (rc < 0)
2897                 GOTO(unlock_layout, rc);
2898
2899         lovea_size = rc;
2900         if (buf->lb_len < lovea_size) {
2901                 lu_buf_realloc(buf, lovea_size);
2902                 if (buf->lb_buf == NULL)
2903                         GOTO(unlock_layout, rc = -ENOMEM);
2904         }
2905
2906         if (!(bk->lb_param & LPF_DRYRUN)) {
2907                 handle = lfsck_trans_create(env, dt, lfsck);
2908                 if (IS_ERR(handle))
2909                         GOTO(unlock_layout, rc = PTR_ERR(handle));
2910
2911                 rc = dt_declare_xattr_set(env, parent, buf, XATTR_NAME_LOV,
2912                                           fl, handle);
2913                 if (rc != 0)
2914                         GOTO(stop, rc);
2915
2916                 rc = dt_trans_start_local(env, dt, handle);
2917                 if (rc != 0)
2918                         GOTO(stop, rc);
2919         }
2920
2921         dt_write_lock(env, parent, 0);
2922         locked = true;
2923         rc = dt_xattr_get(env, parent, buf, XATTR_NAME_LOV);
2924         if (rc == -ERANGE) {
2925                 rc = dt_xattr_get(env, parent, &LU_BUF_NULL, XATTR_NAME_LOV);
2926                 LASSERT(rc != 0);
2927                 goto again;
2928         } else if (rc == -ENODATA || rc == 0) {
2929                 lovea_size = lfsck_lovea_size(ol, ea_off);
2930                 /* If the declared is not big enough, re-try. */
2931                 if (buf->lb_len < lovea_size) {
2932                         rc = lovea_size;
2933                         goto again;
2934                 }
2935                 fl = LU_XATTR_CREATE;
2936         } else if (rc < 0) {
2937                 GOTO(unlock_parent, rc);
2938         } else if (unlikely(buf->lb_len == 0)) {
2939                 goto again;
2940         } else {
2941                 fl = LU_XATTR_REPLACE;
2942                 lovea_size = rc;
2943         }
2944
2945         if (fl == LU_XATTR_CREATE) {
2946                 if (bk->lb_param & LPF_DRYRUN)
2947                         GOTO(unlock_parent, rc = 1);
2948
2949                 LASSERT(buf->lb_len >= lovea_size);
2950
2951                 rc = lfsck_layout_update_lovea(env, lfsck, handle, rec, parent,
2952                                                cfid, buf, fl, ost_idx, ea_off);
2953
2954                 GOTO(unlock_parent, rc);
2955         }
2956
2957         lmm = buf->lb_buf;
2958         rc1 = lfsck_layout_verify_header(parent, lmm, lovea_size);
2959
2960         /* If the LOV EA crashed, the rebuild it. */
2961         if (rc1 == -EINVAL) {
2962                 if (bk->lb_param & LPF_DRYRUN)
2963                         GOTO(unlock_parent, rc = 1);
2964
2965                 LASSERT(buf->lb_len >= lovea_size);
2966
2967                 rc = lfsck_layout_update_lovea(env, lfsck, handle, rec, parent,
2968                                                cfid, buf, fl, ost_idx, ea_off);
2969
2970                 GOTO(unlock_parent, rc);
2971         }
2972
2973         /* For other unknown magic/pattern, keep the current LOV EA. */
2974         if (rc1 == -EOPNOTSUPP)
2975                 GOTO(unlock_parent, rc1 = 0);
2976
2977         if (rc1)
2978                 GOTO(unlock_parent, rc = rc1);
2979
2980         magic = le32_to_cpu(lmm->lmm_magic);
2981         if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
2982                 __u64 start;
2983                 __u64 end;
2984                 __u16 mirror_id0 = mirror_id_of(ol->ol_comp_id);
2985                 __u16 mirror_id1;
2986
2987                 if (bk->lb_param & LPF_DRYRUN)
2988                         GOTO(unlock_parent, rc = 1);
2989
2990                 lcm = buf->lb_buf;
2991                 count = le16_to_cpu(lcm->lcm_entry_count);
2992                 for (i = 0; i < count; pos = ++i) {
2993                         lcme = &lcm->lcm_entries[i];
2994                         start = le64_to_cpu(lcme->lcme_extent.e_start);
2995                         end = le64_to_cpu(lcme->lcme_extent.e_end);
2996                         mirror_id1 = mirror_id_of(le32_to_cpu(lcme->lcme_id));
2997
2998                         if (mirror_id0 > mirror_id1)
2999                                 continue;
3000
3001                         if (mirror_id0 < mirror_id1)
3002                                 break;
3003
3004                         new_mirror = false;
3005                         if (end <= ol->ol_comp_start)
3006                                 continue;
3007
3008                         if (start >= ol->ol_comp_end)
3009                                 break;
3010
3011                         lmm = buf->lb_buf + le32_to_cpu(lcme->lcme_offset);
3012                         magic = le32_to_cpu(lmm->lmm_magic);
3013                         flags = le32_to_cpu(lcme->lcme_flags);
3014                         goto further;
3015                 }
3016
3017                 rc = lfsck_layout_add_comp(env, lfsck, handle, rec, parent,
3018                                 cfid, buf, ost_idx, ea_off, pos, new_mirror);
3019
3020                 GOTO(unlock_parent, rc);
3021         }
3022
3023 further:
3024         count = le16_to_cpu(lmm->lmm_stripe_count);
3025         if (count == 0)
3026                 GOTO(unlock_parent, rc = -EINVAL);
3027         LASSERT(count > 0);
3028
3029         /* Exceed the current end of MDT-object layout EA. Then extend it. */
3030         if (count <= ea_off) {
3031                 if (bk->lb_param & LPF_DRYRUN)
3032                         GOTO(unlock_parent, rc = 1);
3033
3034                 lovea_size = lov_mds_md_size(ea_off + 1, magic);
3035                 /* If the declared is not big enough, re-try. */
3036                 if (buf->lb_len < lovea_size) {
3037                         rc = lovea_size;
3038                         goto again;
3039                 }
3040
3041                 if (lcm) {
3042                         LASSERT(lcme);
3043
3044                         lcme->lcme_flags = cpu_to_le32(flags | LCME_FL_INIT);
3045                         lfsck_layout_update_lcm(lcm, lcme,
3046                                                 rec->lor_layout_version,
3047                                                 rec->lor_range);
3048                 }
3049
3050                 rc = lfsck_layout_extend_v1v3_lovea(env, lfsck, handle, ol,
3051                                         parent, cfid, buf, ost_idx, ea_off);
3052
3053                 GOTO(unlock_parent, rc);
3054         }
3055
3056         LASSERTF(rc > 0, "invalid rc = %d\n", rc);
3057
3058         if (magic == LOV_MAGIC_V1) {
3059                 objs = &lmm->lmm_objects[0];
3060         } else {
3061                 LASSERT(magic == LOV_MAGIC_V3);
3062                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
3063         }
3064
3065         for (i = 0; i < count; i++, objs++) {
3066                 /* The MDT-object was created via lfsck_layout_recover_create()
3067                  * by others before, and we fill the dummy layout EA. */
3068                 if ((lcme && !(flags & LCME_FL_INIT)) ||
3069                      lovea_slot_is_dummy(objs)) {
3070                         if (i != ea_off)
3071                                 continue;
3072
3073                         if (bk->lb_param & LPF_DRYRUN)
3074                                 GOTO(unlock_parent, rc = 1);
3075
3076                         lmm->lmm_layout_gen =
3077                             cpu_to_le16(le16_to_cpu(lmm->lmm_layout_gen) + 1);
3078                         if (lcme) {
3079                                 LASSERT(lcm);
3080
3081                                 if (le32_to_cpu(lmm->lmm_stripe_size) !=
3082                                         ol->ol_stripe_size ||
3083                                     le16_to_cpu(lmm->lmm_stripe_count) !=
3084                                         ol->ol_stripe_count ||
3085                                     le64_to_cpu(lcme->lcme_extent.e_start) !=
3086                                         ol->ol_comp_start ||
3087                                     le64_to_cpu(lcme->lcme_extent.e_end) !=
3088                                         ol->ol_comp_end) {
3089                                         CDEBUG(D_LFSCK, "%s: found invalid "
3090                                         "component for "DFID ": parent "DFID
3091                                         ", stripe-index %u, stripe_size %u, "
3092                                         "stripe_count %u, comp_id %u, "
3093                                         "comp_start %llu, comp_end %llu, "
3094                                         "cur_stripe_size %u, "
3095                                         "cur_stripe_count %u, "
3096                                         "cur_comp_start %llu, "
3097                                         "cur_comp_end %llu\n",
3098                                         lfsck_lfsck2name(lfsck), PFID(cfid),
3099                                         PFID(lfsck_dto2fid(parent)), ea_off,
3100                                         ol->ol_stripe_size,
3101                                         ol->ol_stripe_count, ol->ol_comp_id,
3102                                         ol->ol_comp_start, ol->ol_comp_end,
3103                                         le32_to_cpu(lmm->lmm_stripe_size),
3104                                         le16_to_cpu(lmm->lmm_stripe_count),
3105                                         le64_to_cpu(lcme->lcme_extent.e_start),
3106                                         le64_to_cpu(lcme->lcme_extent.e_end));
3107
3108                                         GOTO(unlock_parent, rc = -EINVAL);
3109                                 }
3110
3111                                 lovea_size = le32_to_cpu(lcm->lcm_size);
3112                                 lcme->lcme_flags = cpu_to_le32(flags |
3113                                                                LCME_FL_INIT);
3114                                 lfsck_layout_update_lcm(lcm, lcme,
3115                                                         rec->lor_layout_version,
3116                                                         rec->lor_range);
3117                         }
3118
3119                         LASSERTF(buf->lb_len >= lovea_size,
3120                                  "buffer len %d is less than real size %d\n",
3121                                  (int)buf->lb_len, (int)lovea_size);
3122
3123                         rc = lfsck_layout_refill_lovea(env, lfsck, handle,
3124                                                 parent, cfid, buf, lmm, objs,
3125                                                 fl, ost_idx, lovea_size);
3126
3127                         CDEBUG(D_LFSCK, "%s layout LFSCK assistant fill "
3128                                "dummy layout slot for "DFID": parent "DFID
3129                                ", OST-index %u, stripe-index %u: rc = %d\n",
3130                                lfsck_lfsck2name(lfsck), PFID(cfid),
3131                                PFID(lfsck_dto2fid(parent)), ost_idx, i, rc);
3132
3133                         GOTO(unlock_parent, rc);
3134                 }
3135
3136                 ostid_le_to_cpu(&objs->l_ost_oi, oi);
3137                 rc = ostid_to_fid(fid, oi, le32_to_cpu(objs->l_ost_idx));
3138                 if (rc != 0) {
3139                         CDEBUG(D_LFSCK, "%s: the parent "DFID" contains "
3140                                "invalid layout EA at the slot %d, index %u\n",
3141                                lfsck_lfsck2name(lfsck),
3142                                PFID(lfsck_dto2fid(parent)), i,
3143                                le32_to_cpu(objs->l_ost_idx));
3144
3145                         GOTO(unlock_parent, rc);
3146                 }
3147
3148                 /* It should be rare case, the slot is there, but the LFSCK
3149                  * does not handle it during the first-phase cycle scanning. */
3150                 if (unlikely(lu_fid_eq(fid, cfid))) {
3151                         if (i == ea_off) {
3152                                 GOTO(unlock_parent, rc = 0);
3153                         } else {
3154                                 /* Rare case that the OST-object index
3155                                  * does not match the parent MDT-object
3156                                  * layout EA. We trust the later one. */
3157                                 if (bk->lb_param & LPF_DRYRUN)
3158                                         GOTO(unlock_parent, rc = 1);
3159
3160                                 dt_write_unlock(env, parent);
3161                                 if (handle != NULL)
3162                                         dt_trans_stop(env, dt, handle);
3163                                 lfsck_ibits_unlock(&lh, LCK_EX);
3164                                 rc = lfsck_layout_update_pfid(env, com, parent,
3165                                                         cfid, ltd->ltd_tgt,
3166                                                         rec, i);
3167
3168                                 CDEBUG(D_LFSCK, "%s layout LFSCK assistant "
3169                                        "updated OST-object's pfid for "DFID
3170                                        ": parent "DFID", OST-index %u, "
3171                                        "stripe-index %u: rc = %d\n",
3172                                        lfsck_lfsck2name(lfsck), PFID(cfid),
3173                                        PFID(lfsck_dto2fid(parent)),
3174                                        ltd->ltd_index, i, rc);
3175
3176                                 RETURN(rc);
3177                         }
3178                 }
3179         }
3180
3181         /* The MDT-object exists, but related layout EA slot is occupied
3182          * by others. */
3183         if (bk->lb_param & LPF_DRYRUN)
3184                 GOTO(unlock_parent, rc = 1);
3185
3186         dt_write_unlock(env, parent);
3187         if (handle != NULL)
3188                 dt_trans_stop(env, dt, handle);
3189         lfsck_ibits_unlock(&lh, LCK_EX);
3190         if (magic == LOV_MAGIC_V1)
3191                 objs = &lmm->lmm_objects[ea_off];
3192         else
3193                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[ea_off];
3194         rc = lfsck_layout_conflict_create(env, com, ltd, rec, parent, cfid,
3195                                           buf, lmm, objs, ea_off, lovea_size);
3196
3197         RETURN(rc);
3198
3199 unlock_parent:
3200         if (locked)
3201                 dt_write_unlock(env, parent);
3202
3203 stop:
3204         if (handle != NULL)
3205                 dt_trans_stop(env, dt, handle);
3206
3207 unlock_layout:
3208         lfsck_ibits_unlock(&lh, LCK_EX);
3209
3210         return rc;
3211 }
3212
3213 static int lfsck_layout_scan_orphan_one(const struct lu_env *env,
3214                                         struct lfsck_component *com,
3215                                         struct lfsck_tgt_desc *ltd,
3216                                         struct lu_orphan_rec_v3 *rec,
3217                                         struct lu_fid *cfid)
3218 {
3219         struct lfsck_layout     *lo     = com->lc_file_ram;
3220         struct lu_fid           *pfid   = &rec->lor_rec.lor_fid;
3221         struct dt_object        *parent = NULL;
3222         __u32                    ea_off = pfid->f_stripe_idx;
3223         int                      rc     = 0;
3224         ENTRY;
3225
3226         if (!fid_is_sane(cfid))
3227                 GOTO(out, rc = -EINVAL);
3228
3229         pfid->f_ver = 0;
3230         if (fid_is_zero(pfid)) {
3231                 rc = lfsck_layout_recreate_parent(env, com, ltd, rec, cfid,
3232                                                   "", "N", ea_off);
3233                 GOTO(out, rc);
3234         }
3235
3236         if (!fid_is_sane(pfid))
3237                 GOTO(out, rc = -EINVAL);
3238
3239         parent = lfsck_object_find_by_dev(env, com->lc_lfsck->li_bottom, pfid);
3240         if (IS_ERR(parent))
3241                 GOTO(out, rc = PTR_ERR(parent));
3242
3243         if (unlikely(dt_object_remote(parent) != 0))
3244                 GOTO(put, rc = -EXDEV);
3245
3246         if (dt_object_exists(parent) == 0) {
3247                 lfsck_object_put(env, parent);
3248                 rc = lfsck_layout_recreate_parent(env, com, ltd, rec, cfid,
3249                                                   "", "R", ea_off);
3250                 GOTO(out, rc);
3251         }
3252
3253         if (!S_ISREG(lu_object_attr(&parent->do_lu)))
3254                 GOTO(put, rc = -EISDIR);
3255
3256         /* The orphan OST-object claims to be the parent's stripe, then
3257          * related dangling record in the trace file is meaningless. */
3258         rc = lfsck_layout_del_dangling_rec(env, com, pfid,
3259                                            rec->lor_layout.ol_comp_id, ea_off);
3260         if (rc && rc != -ENOENT)
3261                 GOTO(put, rc);
3262
3263         rc = lfsck_layout_recreate_lovea(env, com, ltd, rec, parent, cfid,
3264                                          ltd->ltd_index, ea_off);
3265
3266         GOTO(put, rc);
3267
3268 put:
3269         if (rc <= 0)
3270                 lfsck_object_put(env, parent);
3271         else
3272                 /* The layout EA is changed, need to be reloaded next time. */
3273                 dt_object_put_nocache(env, parent);
3274
3275 out:
3276         down_write(&com->lc_sem);
3277         com->lc_new_scanned++;
3278         com->lc_new_checked++;
3279         if (rc > 0) {
3280                 lo->ll_objs_repaired[LLIT_ORPHAN - 1]++;
3281                 rc = 0;
3282         } else if (rc < 0) {
3283                 lo->ll_objs_failed_phase2++;
3284         }
3285         up_write(&com->lc_sem);
3286
3287         return rc;
3288 }
3289
3290 static int lfsck_layout_scan_orphan(const struct lu_env *env,
3291                                     struct lfsck_component *com,
3292                                     struct lfsck_tgt_desc *ltd)
3293 {
3294         struct lfsck_assistant_data     *lad    = com->lc_data;
3295         struct lfsck_instance           *lfsck  = com->lc_lfsck;
3296         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
3297         struct lfsck_thread_info        *info   = lfsck_env_info(env);
3298         struct lu_fid                   *fid    = &info->lti_fid;
3299         struct dt_object                *obj;
3300         const struct dt_it_ops          *iops;
3301         struct dt_it                    *di;
3302         int                              rc     = 0;
3303         ENTRY;
3304
3305         CDEBUG(D_LFSCK, "%s: layout LFSCK assistant starts the orphan "
3306                "scanning for OST%04x\n",
3307                lfsck_lfsck2name(lfsck), ltd->ltd_index);
3308
3309         if (cfs_bitmap_check(lad->lad_bitmap, ltd->ltd_index)) {
3310                 CDEBUG(D_LFSCK, "%s: layout LFSCK assistant skip the orphan "
3311                        "scanning for OST%04x\n",
3312                        lfsck_lfsck2name(lfsck), ltd->ltd_index);
3313
3314                 RETURN(0);
3315         }
3316
3317         fid->f_seq = fid_idif_seq(0, ltd->ltd_index);
3318         fid->f_oid = fid->f_ver = 0;
3319
3320         obj = lfsck_object_find_by_dev(env, ltd->ltd_tgt, fid);
3321         if (unlikely(IS_ERR(obj)))
3322                 GOTO(log, rc = PTR_ERR(obj));
3323
3324         rc = obj->do_ops->do_index_try(env, obj,
3325                                        &dt_lfsck_layout_orphan_features);
3326         if (rc != 0)
3327                 GOTO(put, rc);
3328
3329         iops = &obj->do_index_ops->dio_it;
3330         di = iops->init(env, obj, 0);
3331         if (IS_ERR(di))
3332                 GOTO(put, rc = PTR_ERR(di));
3333
3334         rc = iops->load(env, di, 0);
3335         if (rc == -ESRCH) {
3336                 /* -ESRCH means that the orphan OST-objects rbtree has been
3337                  * cleanup because of the OSS server restart or other errors. */
3338                 lfsck_lad_set_bitmap(env, com, ltd->ltd_index);
3339                 GOTO(fini, rc);
3340         }
3341
3342         if (rc == 0)
3343                 rc = iops->next(env, di);
3344         else if (rc > 0)
3345                 rc = 0;
3346
3347         if (rc < 0)
3348                 GOTO(fini, rc);
3349
3350         if (rc > 0)
3351                 GOTO(fini, rc = 0);
3352
3353         do {
3354                 struct dt_key           *key;
3355                 struct lu_orphan_rec_v3 *rec = &info->lti_rec;
3356
3357                 if (CFS_FAIL_TIMEOUT(OBD_FAIL_LFSCK_DELAY3, cfs_fail_val) &&
3358                     unlikely(!thread_is_running(&lfsck->li_thread)))
3359                         break;
3360
3361                 key = iops->key(env, di);
3362                 com->lc_fid_latest_scanned_phase2 = *(struct lu_fid *)key;
3363                 /* Remote target OST may be runnning old LFSCK */
3364                 memset(rec, 0, sizeof(*rec));
3365                 rc = iops->rec(env, di, (struct dt_rec *)rec, 0);
3366                 if (rc == 0)
3367                         rc = lfsck_layout_scan_orphan_one(env, com, ltd, rec,
3368                                         &com->lc_fid_latest_scanned_phase2);
3369                 if (rc != 0 && bk->lb_param & LPF_FAILOUT)
3370                         GOTO(fini, rc);
3371
3372                 lfsck_control_speed_by_self(com);
3373                 do {
3374                         rc = iops->next(env, di);
3375                 } while (rc < 0 && !(bk->lb_param & LPF_FAILOUT));
3376         } while (rc == 0);
3377
3378         GOTO(fini, rc);
3379
3380 fini:
3381         iops->put(env, di);
3382         iops->fini(env, di);
3383 put:
3384         lfsck_object_put(env, obj);
3385
3386 log:
3387         CDEBUG(D_LFSCK, "%s: layout LFSCK assistant finished the orphan "
3388                "scanning for OST%04x: rc = %d\n",
3389                lfsck_lfsck2name(lfsck), ltd->ltd_index, rc);
3390
3391         return rc > 0 ? 0 : rc;
3392 }
3393
3394 static int lfsck_lov2layout(struct lov_mds_md_v1 *lmm, struct filter_fid *ff,
3395                             __u32 comp_id)
3396 {
3397         struct ost_layout *ol = &ff->ff_layout;
3398         __u32 magic = le32_to_cpu(lmm->lmm_magic);
3399         int rc = 0;
3400         ENTRY;
3401
3402         if (magic == LOV_MAGIC_V1 || magic == LOV_MAGIC_V3) {
3403                 ol->ol_stripe_size = lmm->lmm_stripe_size;
3404                 ol->ol_stripe_count = lmm->lmm_stripe_count;
3405                 ol->ol_comp_start = 0;
3406                 ol->ol_comp_end = 0;
3407                 ol->ol_comp_id = 0;
3408                 ff->ff_layout_version = 0;
3409                 ff->ff_range = 0;
3410         } else if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
3411                 struct lov_comp_md_v1 *lcm = (struct lov_comp_md_v1 *)lmm;
3412                 struct lov_comp_md_entry_v1 *lcme = NULL;
3413                 __u16 count = le16_to_cpu(lcm->lcm_entry_count);
3414                 int i;
3415
3416                 for (i = 0; i < count; i++) {
3417                         lcme = &lcm->lcm_entries[i];
3418                         if (le32_to_cpu(lcme->lcme_id) == comp_id) {
3419                                 LASSERT(le32_to_cpu(lcme->lcme_flags) &
3420                                         LCME_FL_INIT);
3421
3422                                 break;
3423                         }
3424                 }
3425
3426                 /* The comp has been removed, do nothing. */
3427                 if (i == count)
3428                         GOTO(out, rc = 1);
3429
3430                 lmm = (void *)lmm + le32_to_cpu(lcme->lcme_offset);
3431                 ol->ol_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
3432                 ol->ol_stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
3433                 ol->ol_comp_start = le64_to_cpu(lcme->lcme_extent.e_start);
3434                 ol->ol_comp_end = le64_to_cpu(lcme->lcme_extent.e_end);
3435                 ol->ol_comp_id = le32_to_cpu(lcme->lcme_id);
3436                 ff->ff_layout_version = le32_to_cpu(lcme->lcme_layout_gen);
3437                 ff->ff_range = 0;
3438         } else {
3439                 GOTO(out, rc = -EINVAL);
3440         }
3441
3442         EXIT;
3443
3444 out:
3445         return rc;
3446 }
3447
3448 /**
3449  * Repair the MDT-object with dangling LOV EA reference.
3450  *
3451  * we need to repair the inconsistency according to the users' requirement:
3452  *
3453  * 1) Keep the inconsistency there and report the inconsistency case,
3454  *    then give the chance to the application to find related issues,
3455  *    and the users can make the decision about how to handle it with
3456  *    more human knownledge. (by default)
3457  *
3458  * 2) Re-create the missing OST-object with the FID/owner information.
3459  *
3460  * \param[in] env       pointer to the thread context
3461  * \param[in] com       the layout LFSCK component
3462  * \param[in] parent    the MDT-object with dangling LOV EA reference
3463  * \param[in] child     the OST-object to be created
3464  * \param[in] comp_id   the component ID of the OST-object in the LOV EA
3465  * \param[in] ea_off    the offset of the OST-object in the LOV EA
3466  * \param[in] ost_idx   the index of OST on which the OST-object resides
3467  *
3468  * \retval              +1 for repair successfully
3469  * \retval              0 for did nothing
3470  * \retval              negative error number on failure
3471  */
3472 static int __lfsck_layout_repair_dangling(const struct lu_env *env,
3473                                           struct lfsck_component *com,
3474                                           struct dt_object *parent,
3475                                           struct dt_object *child,
3476                                           __u32 comp_id, __u32 ea_off,
3477                                           __u32 ost_idx, bool log)
3478 {
3479         struct lfsck_thread_info *info = lfsck_env_info(env);
3480         struct filter_fid *ff = &info->lti_ff;
3481         struct dt_object_format *dof = &info->lti_dof;
3482         struct lu_attr *la = &info->lti_la;
3483         struct lfsck_instance *lfsck = com->lc_lfsck;
3484         struct dt_device *dev = lfsck_obj2dev(child);
3485         const struct lu_fid *pfid = lfsck_dto2fid(parent);
3486         const struct lu_fid *cfid = lfsck_dto2fid(child);
3487         struct lu_buf *tbuf = &info->lti_big_buf;
3488         struct thandle *handle;
3489         struct lu_buf *buf;
3490         struct lustre_handle lh = { 0 };
3491         int rc;
3492         ENTRY;
3493
3494         if (!(lfsck->li_bookmark_ram.lb_param & LPF_CREATE_OSTOBJ))
3495                 GOTO(log, rc = 1);
3496
3497         rc = lfsck_ibits_lock(env, lfsck, parent, &lh,
3498                               MDS_INODELOCK_LAYOUT | MDS_INODELOCK_XATTR,
3499                               LCK_EX);
3500         if (rc != 0)
3501                 GOTO(log, rc);
3502
3503         rc = dt_attr_get(env, parent, la);
3504         if (rc != 0)
3505                 GOTO(unlock1, rc);
3506
3507         la->la_mode = S_IFREG | 0666;
3508         la->la_atime = la->la_mtime = la->la_ctime = 0;
3509         la->la_valid = LA_TYPE | LA_MODE | LA_UID | LA_GID |
3510                        LA_ATIME | LA_MTIME | LA_CTIME;
3511         memset(dof, 0, sizeof(*dof));
3512         ff->ff_parent.f_seq = cpu_to_le64(pfid->f_seq);
3513         ff->ff_parent.f_oid = cpu_to_le32(pfid->f_oid);
3514         /* Currently, the filter_fid::ff_parent::f_ver is not the real parent
3515          * MDT-object's FID::f_ver, instead it is the OST-object index in its
3516          * parent MDT-object's layout EA. */
3517         ff->ff_parent.f_stripe_idx = cpu_to_le32(ea_off);
3518
3519         rc = lfsck_layout_get_lovea(env, parent, tbuf);
3520         if (unlikely(rc == -ENODATA))
3521                 rc = 0;
3522         if (rc <= 0)
3523                 GOTO(unlock1, rc);
3524
3525         rc = lfsck_lov2layout(tbuf->lb_buf, ff, comp_id);
3526         if (rc)
3527                 GOTO(unlock1, rc);
3528
3529         buf = lfsck_buf_get(env, ff, sizeof(struct filter_fid));
3530         handle = lfsck_trans_create(env, dev, lfsck);
3531         if (IS_ERR(handle))
3532                 GOTO(unlock1, rc = PTR_ERR(handle));
3533
3534         rc = dt_declare_create(env, child, la, NULL, dof, handle);
3535         if (rc != 0)
3536                 GOTO(stop, rc);
3537
3538         rc = dt_declare_xattr_set(env, child, buf, XATTR_NAME_FID,
3539                                   LU_XATTR_CREATE, handle);
3540         if (rc != 0)
3541                 GOTO(stop, rc);
3542
3543         rc = dt_trans_start_local(env, dev, handle);
3544         if (rc != 0)
3545                 GOTO(stop, rc);
3546
3547         dt_read_lock(env, parent, 0);
3548         if (unlikely(lfsck_is_dead_obj(parent)))
3549                 GOTO(unlock2, rc = 0);
3550
3551         if (lfsck->li_bookmark_ram.lb_param & LPF_DELAY_CREATE_OSTOBJ) {
3552                 struct ost_id *oi = &info->lti_oi;
3553                 struct lu_fid *tfid = &info->lti_fid2;
3554                 struct lu_buf *lovea = &info->lti_big_buf;
3555                 struct lov_mds_md_v1 *lmm;
3556                 struct lov_ost_data_v1 *objs;
3557                 __u32 magic;
3558                 int count;
3559                 int idx2;
3560
3561                 rc = lfsck_layout_get_lovea(env, parent, lovea);
3562                 if (unlikely(rc == -ENODATA))
3563                         rc = 0;
3564                 if (rc <= 0)
3565                         GOTO(unlock2, rc);
3566
3567                 lmm = lovea->lb_buf;
3568                 magic = le32_to_cpu(lmm->lmm_magic);
3569                 if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
3570                         struct lov_comp_md_v1 *lcm = buf->lb_buf;
3571                         struct lov_comp_md_entry_v1 *lcme;
3572                         __u16 count = le16_to_cpu(lcm->lcm_entry_count);
3573                         int i;
3574
3575                         for (i = 0; i < count; i++) {
3576                                 lcme = &lcm->lcm_entries[i];
3577                                 if (le32_to_cpu(lcme->lcme_id) == comp_id) {
3578                                         LASSERT(le32_to_cpu(lcme->lcme_flags) &
3579                                                 LCME_FL_INIT);
3580
3581                                         lmm = lovea->lb_buf +
3582                                                 le32_to_cpu(lcme->lcme_offset);
3583                                         magic = le32_to_cpu(lmm->lmm_magic);
3584                                         goto check;
3585                                 }
3586                         }
3587
3588                         /* Someone removed the component, do nothing. */
3589                         GOTO(unlock2, rc = 0);
3590                 }
3591
3592 check:
3593                 count = le16_to_cpu(lmm->lmm_stripe_count);
3594                 /* Someone changed the LOV EA, do nothing. */
3595                 if (count <= ea_off)
3596                         GOTO(unlock2, rc = 0);
3597
3598                 if (magic == LOV_MAGIC_V1) {
3599                         objs = &lmm->lmm_objects[ea_off];
3600                 } else {
3601                         LASSERT(magic == LOV_MAGIC_V3);
3602
3603                         objs = &((struct lov_mds_md_v3 *)lmm)->\
3604                                                         lmm_objects[ea_off];
3605                 }
3606
3607                 ostid_le_to_cpu(&objs->l_ost_oi, oi);
3608                 idx2 = le32_to_cpu(objs->l_ost_idx);
3609                 rc = ostid_to_fid(tfid, oi, idx2);
3610                 /* Someone changed the LOV EA, do nothing. */
3611                 if (rc != 0 || !lu_fid_eq(tfid, cfid))
3612                         GOTO(unlock2, rc);
3613         }
3614
3615         rc = dt_create(env, child, la, NULL, dof, handle);
3616         if (rc != 0)
3617                 GOTO(unlock2, rc);
3618
3619         rc = dt_xattr_set(env, child, buf, XATTR_NAME_FID, LU_XATTR_CREATE,
3620                           handle);
3621
3622         GOTO(unlock2, rc);
3623
3624 unlock2:
3625         dt_read_unlock(env, parent);
3626
3627 stop:
3628         rc = lfsck_layout_trans_stop(env, dev, handle, rc);
3629
3630 unlock1:
3631         lfsck_ibits_unlock(&lh, LCK_EX);
3632
3633 log:
3634         if (rc && log)
3635                 CDEBUG(D_LFSCK, "%s: layout LFSCK assistant found "
3636                        "dangling reference for: parent "DFID", child "
3637                        DFID", comp_id %u, ea_off %u, ost_idx %u, %s: "
3638                        "rc = %d\n",
3639                        lfsck_lfsck2name(lfsck), PFID(pfid), PFID(cfid),
3640                        comp_id, ea_off, ost_idx,
3641                        (lfsck->li_bookmark_ram.lb_param & LPF_CREATE_OSTOBJ) ?
3642                                 "Create the lost OST-object as required" :
3643                                 "Keep the MDT-object there by default", rc);
3644
3645         return rc;
3646 }
3647
3648 /**
3649  * Repair the MDT-object with dangling LOV EA reference.
3650  *
3651  * Prepare parameters and call __lfsck_layout_repair_dangling()
3652  * to repair the dangling LOV EA reference.
3653  *
3654  * \param[in] env       pointer to the thread context
3655  * \param[in] com       the layout LFSCK component
3656  * \param[in] pfid      the MDT-object's FID
3657  * \param[in] cfid      the FID for the OST-object to be created
3658  * \param[in] comp_id   the component ID of the OST-object in the LOV EA
3659  * \param[in] ea_off    the offset of the OST-object in the LOV EA
3660  * \param[in] ost_idx   the index of OST on which the OST-object resides
3661  *
3662  * \retval              +1 for repair successfully
3663  * \retval              0 for did nothing
3664  * \retval              negative error number on failure
3665  */
3666 static int lfsck_layout_repair_dangling(const struct lu_env *env,
3667                                         struct lfsck_component *com,
3668                                         const struct lu_fid *pfid,
3669                                         const struct lu_fid *cfid,
3670                                         __u32 comp_id, __u32 ea_off,
3671                                         __u32 ost_idx)
3672 {
3673         struct lfsck_instance *lfsck = com->lc_lfsck;
3674         struct dt_object *parent = NULL;
3675         struct dt_object *child = NULL;
3676         struct lfsck_tgt_desc *ltd;
3677         int rc;
3678         ENTRY;
3679
3680         parent = lfsck_object_find_bottom(env, lfsck, pfid);
3681         if (IS_ERR(parent))
3682                 GOTO(log, rc = PTR_ERR(parent));
3683
3684         /* The MDT-object has been removed. */
3685         if (dt_object_exists(parent) == 0)
3686                 GOTO(log, rc = 0);
3687
3688         ltd = lfsck_ltd2tgt(&lfsck->li_ost_descs, ost_idx);
3689         if (unlikely(ltd == NULL))
3690                 GOTO(log, rc = -ENODEV);
3691
3692         child = lfsck_object_find_by_dev(env, ltd->ltd_tgt, cfid);
3693         if (IS_ERR(child))
3694                 GOTO(log, rc = PTR_ERR(child));
3695
3696         /* The OST-object has been created. */
3697         if (unlikely(dt_object_exists(child) != 0))
3698                 GOTO(log, rc = 0);
3699
3700         rc = __lfsck_layout_repair_dangling(env, com, parent, child,
3701                                             comp_id, ea_off, ost_idx, false);
3702
3703         GOTO(log, rc);
3704
3705 log:
3706         if (child != NULL && !IS_ERR(child))
3707                 lfsck_object_put(env, child);
3708
3709         if (parent != NULL && !IS_ERR(parent))
3710                 lfsck_object_put(env, parent);
3711
3712         if (rc)
3713                 CDEBUG(D_LFSCK, "%s: layout LFSCK assistant found "
3714                        "dangling reference for: parent "DFID", child "
3715                        DFID", comp_id %u, ea_off %u, ost_idx %u, %s: rc = %d\n",
3716                        lfsck_lfsck2name(lfsck), PFID(pfid), PFID(cfid),
3717                        comp_id, ea_off, ost_idx,
3718                        (lfsck->li_bookmark_ram.lb_param & LPF_CREATE_OSTOBJ) ?
3719                                 "Create the lost OST-object as required" :
3720                                 "Keep the MDT-object there by default", rc);
3721
3722         return rc;
3723 }
3724
3725 /* If the OST-object does not recognize the MDT-object as its parent, and
3726  * there is no other MDT-object claims as its parent, then just trust the
3727  * given MDT-object as its parent. So update the OST-object filter_fid. */
3728 static int lfsck_layout_repair_unmatched_pair(const struct lu_env *env,
3729                                               struct lfsck_component *com,
3730                                               struct dt_object *parent,
3731                                               struct lfsck_layout_req *llr,
3732                                               struct lu_attr *la)
3733 {
3734         struct lfsck_thread_info        *info   = lfsck_env_info(env);
3735         struct filter_fid               *ff     = &info->lti_ff;
3736         struct dt_object                *child  = llr->llr_child;
3737         struct dt_device                *dev    = lfsck_obj2dev(child);
3738         const struct lu_fid             *tfid   = lu_object_fid(&parent->do_lu);
3739         struct lu_buf                   *tbuf   = &info->lti_big_buf;
3740         struct thandle                  *handle;
3741         struct lu_buf                   *buf;
3742         struct lustre_handle             lh     = { 0 };
3743         int                              rc;
3744         ENTRY;
3745
3746         rc = lfsck_ibits_lock(env, com->lc_lfsck, parent, &lh,
3747                               MDS_INODELOCK_LAYOUT | MDS_INODELOCK_XATTR,
3748                               LCK_EX);
3749         if (rc != 0)
3750                 GOTO(log, rc);
3751
3752         ff->ff_parent.f_seq = cpu_to_le64(tfid->f_seq);
3753         ff->ff_parent.f_oid = cpu_to_le32(tfid->f_oid);
3754         /* Currently, the filter_fid::ff_parent::f_ver is not the real parent
3755          * MDT-object's FID::f_ver, instead it is the OST-object index in its
3756          * parent MDT-object's layout EA. */
3757         ff->ff_parent.f_stripe_idx = cpu_to_le32(llr->llr_lov_idx);
3758
3759         rc = lfsck_layout_get_lovea(env, parent, tbuf);
3760         if (unlikely(rc == -ENODATA))
3761                 rc = 0;
3762         if (rc <= 0)
3763                 GOTO(unlock1, rc);
3764
3765         rc = lfsck_lov2layout(tbuf->lb_buf, ff, llr->llr_comp_id);
3766         if (rc)
3767                 GOTO(unlock1, rc);
3768
3769         buf = lfsck_buf_get(env, ff, sizeof(*ff));
3770
3771         handle = lfsck_trans_create(env, dev, com->lc_lfsck);
3772         if (IS_ERR(handle))
3773                 GOTO(unlock1, rc = PTR_ERR(handle));
3774
3775         rc = dt_declare_xattr_set(env, child, buf, XATTR_NAME_FID, 0, handle);
3776         if (rc != 0)
3777                 GOTO(stop, rc);
3778
3779         rc = dt_attr_get(env, parent, la);
3780         if (rc != 0)
3781                 GOTO(stop, rc);
3782
3783         la->la_valid = LA_UID | LA_GID;
3784         rc = dt_declare_attr_set(env, child, la, handle);
3785         if (rc != 0)
3786                 GOTO(stop, rc);
3787
3788         rc = dt_trans_start_local(env, dev, handle);
3789         if (rc != 0)
3790                 GOTO(stop, rc);
3791
3792         dt_write_lock(env, parent, 0);
3793         if (unlikely(lfsck_is_dead_obj(parent)))
3794                 GOTO(unlock2, rc = 1);
3795
3796         rc = dt_xattr_set(env, child, buf, XATTR_NAME_FID, 0, handle);
3797         if (rc != 0)
3798                 GOTO(unlock2, rc);
3799
3800         /* Get the latest parent's owner. */
3801         rc = dt_attr_get(env, parent, la);
3802         if (rc != 0)
3803                 GOTO(unlock2, rc);
3804
3805         la->la_valid = LA_UID | LA_GID;
3806         rc = dt_attr_set(env, child, la, handle);
3807
3808         GOTO(unlock2, rc);
3809
3810 unlock2:
3811         dt_write_unlock(env, parent);
3812
3813 stop:
3814         rc = lfsck_layout_trans_stop(env, dev, handle, rc);
3815
3816 unlock1:
3817         lfsck_ibits_unlock(&lh, LCK_EX);
3818
3819 log:
3820         if (rc)
3821                 CDEBUG(D_LFSCK, "%s: layout LFSCK assistant repaired "
3822                        "unmatched MDT-OST pair for: parent "DFID
3823                        ", child "DFID", comp_id %u, OST-index %u, "
3824                        "stripe-index %u, owner %u/%u: rc = %d\n",
3825                        lfsck_lfsck2name(com->lc_lfsck),
3826                        PFID(lfsck_dto2fid(parent)),
3827                        PFID(lfsck_dto2fid(child)),
3828                        llr->llr_comp_id, llr->llr_ost_idx, llr->llr_lov_idx,
3829                        la->la_uid, la->la_gid, rc);
3830
3831         return rc;
3832 }
3833
3834 /* If there are more than one MDT-objects claim as the OST-object's parent,
3835  * and the OST-object only recognizes one of them, then we need to generate
3836  * new OST-object(s) with new fid(s) for the non-recognized MDT-object(s). */
3837 static int lfsck_layout_repair_multiple_references(const struct lu_env *env,
3838                                                    struct lfsck_component *com,
3839                                                    struct dt_object *parent,
3840                                                    struct lfsck_layout_req *llr,
3841                                                    struct lu_attr *la)
3842 {
3843         struct lfsck_thread_info        *info   = lfsck_env_info(env);
3844         struct dt_allocation_hint       *hint   = &info->lti_hint;
3845         struct dt_object_format         *dof    = &info->lti_dof;
3846         struct ost_id                   *oi     = &info->lti_oi;
3847         struct lu_buf                   *buf    = &info->lti_big_buf;
3848         struct lfsck_instance           *lfsck  = com->lc_lfsck;
3849         struct dt_device                *dev;
3850         struct lu_device                *d      =
3851                                 &lfsck_obj2dev(llr->llr_child)->dd_lu_dev;
3852         struct lu_object                *o;
3853         struct lu_object                *n;
3854         struct dt_object                *child  = NULL;
3855         struct thandle                  *handle = NULL;
3856         struct lov_mds_md_v1            *lmm;
3857         struct lov_ost_data_v1          *objs;
3858         const struct lu_fid             *pfid   = lfsck_dto2fid(parent);
3859         struct lu_fid                    tfid;
3860         struct lustre_handle             lh     = { 0 };
3861         __u32                            magic;
3862         __u32                            index;
3863         int                              rc;
3864         ENTRY;
3865
3866         /* We use two separated transactions to repair the inconsistency.
3867          *
3868          * 1) create the child (OST-object).
3869          * 2) update the parent LOV EA according to the child's FID.
3870          *
3871          * If 1) succeed, but 2) failed or aborted, then such OST-object will be
3872          * handled as orphan when the layout LFSCK run next time.
3873          *
3874          * If 1) failed, but 2) succeed, then such OST-object will be re-created
3875          * as dangling referened case when the layout LFSCK run next time. */
3876
3877         /* The 1st transaction. */
3878         o = lu_object_anon(env, d, NULL);
3879         if (IS_ERR(o))
3880                 GOTO(log, rc = PTR_ERR(o));
3881
3882         n = lu_object_locate(o->lo_header, d->ld_type);
3883         if (unlikely(n == NULL)) {
3884                 lu_object_put_nocache(env, o);
3885
3886                 GOTO(log, rc = -EINVAL);
3887         }
3888
3889         child = container_of(n, struct dt_object, do_lu);
3890         memset(hint, 0, sizeof(*hint));
3891         rc = dt_attr_get(env, parent, la);
3892         if (rc != 0)
3893                 GOTO(log, rc);
3894
3895         la->la_valid = LA_UID | LA_GID;
3896         memset(dof, 0, sizeof(*dof));
3897
3898         dev = lfsck_obj2dev(child);
3899         handle = lfsck_trans_create(env, dev, lfsck);
3900         if (IS_ERR(handle))
3901                 GOTO(log, rc = PTR_ERR(handle));
3902
3903         rc = dt_declare_create(env, child, la, hint, dof, handle);
3904         if (rc != 0)
3905                 GOTO(stop, rc);
3906
3907         rc = dt_trans_start_local(env, dev, handle);
3908         if (rc != 0)
3909                 GOTO(stop, rc);
3910
3911         rc = dt_create(env, child, la, hint, dof, handle);
3912         dt_trans_stop(env, dev, handle);
3913         handle = NULL;
3914         if (rc != 0)
3915                 GOTO(log, rc);
3916
3917         rc = lfsck_ibits_lock(env, lfsck, parent, &lh,
3918                               MDS_INODELOCK_LAYOUT | MDS_INODELOCK_XATTR,
3919                               LCK_EX);
3920         if (rc != 0)
3921                 GOTO(log, rc);
3922
3923         /* The 2nd transaction. */
3924
3925         /* XXX: Generally, we should use bottom device (OSD) to update parent
3926          *      LOV EA. But because the LOD-object still references the wrong
3927          *      OSP-object that should be detached after the parent's LOV EA
3928          *      refreshed. Unfortunately, there is no suitable API for that.
3929          *      So we have to make the LOD to re-load the OSP-object(s) via
3930          *      replacing the LOV EA against the LOD-object.
3931          *
3932          *      Once the DNE2 patches have been landed, we can replace the
3933          *      LOD device with the OSD device. LU-6230. */
3934
3935         dev = lfsck->li_next;
3936         parent = lfsck_object_locate(dev, parent);
3937         if (IS_ERR(parent))
3938                 GOTO(log, rc = PTR_ERR(parent));
3939
3940         handle = lfsck_trans_create(env, dev, lfsck);
3941         if (IS_ERR(handle))
3942                 GOTO(log, rc = PTR_ERR(handle));
3943
3944         rc = dt_declare_xattr_set(env, parent, buf, XATTR_NAME_LOV,
3945                                   LU_XATTR_REPLACE, handle);
3946         if (rc != 0)
3947                 GOTO(stop, rc);
3948
3949         rc = dt_trans_start_local(env, dev, handle);
3950         if (rc != 0)
3951                 GOTO(stop, rc);
3952
3953         dt_write_lock(env, parent, 0);
3954         if (unlikely(lfsck_is_dead_obj(parent)))
3955                 GOTO(unlock, rc = 0);
3956
3957         rc = lfsck_layout_get_lovea(env, parent, buf);
3958         if (unlikely(rc == -ENODATA))
3959                 rc = 0;
3960         if (rc <= 0)
3961                 GOTO(unlock, rc);
3962
3963         lmm = buf->lb_buf;
3964         magic = le32_to_cpu(lmm->lmm_magic);
3965         if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
3966                 struct lov_comp_md_v1 *lcm = buf->lb_buf;
3967                 struct lov_comp_md_entry_v1 *lcme;
3968                 __u16 count = le16_to_cpu(lcm->lcm_entry_count);
3969                 int i;
3970
3971                 LASSERT(llr->llr_comp_id != 0);
3972
3973                 for (i = 0; i < count; i++) {
3974                         lcme = &lcm->lcm_entries[i];
3975                         if (le32_to_cpu(lcme->lcme_id) == llr->llr_comp_id) {
3976                                 LASSERT(le32_to_cpu(lcme->lcme_flags) &
3977                                         LCME_FL_INIT);
3978
3979                                 le32_add_cpu(&lcm->lcm_layout_gen, 1);
3980                                 lmm = buf->lb_buf +
3981                                         le32_to_cpu(lcme->lcme_offset);
3982                                 magic = le32_to_cpu(lmm->lmm_magic);
3983                                 goto set;
3984                         }
3985                 }
3986
3987                 GOTO(unlock, rc = 0);
3988         }
3989
3990 set:
3991         if (magic == LOV_MAGIC_V1) {
3992                 objs = &lmm->lmm_objects[llr->llr_lov_idx];
3993         } else {
3994                 LASSERT(magic == LOV_MAGIC_V3);
3995                 objs =
3996                 &((struct lov_mds_md_v3 *)lmm)->lmm_objects[llr->llr_lov_idx];
3997         }
3998
3999         ostid_le_to_cpu(&objs->l_ost_oi, oi);
4000         index = le32_to_cpu(objs->l_ost_idx);
4001         rc = ostid_to_fid(&tfid, oi, index);
4002         /* Someone changed layout during the LFSCK, no need to repair then. */
4003         if (rc == 0 && !lu_fid_eq(&tfid, lu_object_fid(&llr->llr_child->do_lu)))
4004                 GOTO(unlock, rc = 0);
4005
4006         lmm->lmm_layout_gen = cpu_to_le16(le16_to_cpu(lmm->lmm_layout_gen) + 1);
4007         fid_to_ostid(lu_object_fid(&child->do_lu), oi);
4008         ostid_cpu_to_le(oi, &objs->l_ost_oi);
4009         objs->l_ost_gen = cpu_to_le32(0);
4010         objs->l_ost_idx = cpu_to_le32(llr->llr_ost_idx);
4011         rc = dt_xattr_set(env, parent, buf, XATTR_NAME_LOV,
4012                           LU_XATTR_REPLACE, handle);
4013
4014         GOTO(unlock, rc = (rc == 0 ? 1 : rc));
4015
4016 unlock:
4017         dt_write_unlock(env, parent);
4018
4019 stop:
4020         if (handle != NULL)
4021                 dt_trans_stop(env, dev, handle);
4022
4023 log:
4024         lfsck_ibits_unlock(&lh, LCK_EX);
4025         if (child != NULL)
4026                 lfsck_object_put(env, child);
4027
4028         if (rc)
4029                 CDEBUG(D_LFSCK, "%s: layout LFSCK assistant repaired "
4030                        "multiple references for: parent "DFID", comp_id %u, "
4031                        "OST-index %u, stripe-index %u, owner %u/%u: rc = %d\n",
4032                        lfsck_lfsck2name(lfsck), PFID(pfid),
4033                        llr->llr_comp_id, llr->llr_ost_idx, llr->llr_lov_idx,
4034                        la->la_uid, la->la_gid, rc);
4035
4036         return rc;
4037 }
4038
4039 /* If the MDT-object and the OST-object have different owner information,
4040  * then trust the MDT-object, because the normal chown/chgrp handle order
4041  * is from MDT to OST, and it is possible that some chown/chgrp operation
4042  * is partly done. */
4043 static int lfsck_layout_repair_owner(const struct lu_env *env,
4044                                      struct lfsck_component *com,
4045                                      struct dt_object *parent,
4046                                      struct lfsck_layout_req *llr,
4047                                      struct lu_attr *pla,
4048                                      const struct lu_attr *cla)
4049 {
4050         struct lfsck_thread_info        *info   = lfsck_env_info(env);
4051         struct lu_attr                  *tla    = &info->lti_la2;
4052         struct dt_object                *child  = llr->llr_child;
4053         struct dt_device                *dev    = lfsck_obj2dev(child);
4054         struct thandle                  *handle;
4055         int                              rc;
4056         dt_obj_version_t                 version;
4057         ENTRY;
4058
4059         tla->la_uid = pla->la_uid;
4060         tla->la_gid = pla->la_gid;
4061         tla->la_valid = LA_UID | LA_GID;
4062         handle = lfsck_trans_create(env, dev, com->lc_lfsck);
4063         if (IS_ERR(handle))
4064                 GOTO(log, rc = PTR_ERR(handle));
4065
4066         rc = dt_declare_attr_set(env, child, tla, handle);
4067         if (rc != 0)
4068                 GOTO(stop, rc);
4069
4070         rc = dt_trans_start_local(env, dev, handle);
4071         if (rc != 0)
4072                 GOTO(stop, rc);
4073
4074         /* Use the dt_object lock to serialize with destroy and attr_set. */
4075         dt_read_lock(env, parent, 0);
4076         if (unlikely(lfsck_is_dead_obj(parent)))
4077                 GOTO(unlock, rc = 1);
4078
4079         version = dt_version_get(env, child);
4080         if (version == -EOPNOTSUPP)
4081                 version = 0;
4082
4083         /* Get the latest parent's owner. */
4084         rc = dt_attr_get(env, parent, pla);
4085         if (rc != 0)
4086                 GOTO(unlock, rc);
4087
4088         /* Some others chown/chgrp during the LFSCK, needs to do nothing. */
4089         if (unlikely((!version && tla->la_ctime == 0) ||
4090                      tla->la_uid != pla->la_uid || tla->la_gid != pla->la_gid))
4091                 rc = 1;
4092         else
4093                 rc = dt_attr_set(env, child, tla, handle);
4094
4095         GOTO(unlock, rc);
4096
4097 unlock:
4098         dt_read_unlock(env, parent);
4099
4100 stop:
4101         rc = lfsck_layout_trans_stop(env, dev, handle, rc);
4102
4103 log:
4104         if (rc != 0)
4105                 CDEBUG(D_LFSCK, "%s: layout LFSCK assistant repaired "
4106                        "inconsistent file owner for: parent "DFID", child "DFID
4107                        ", OST-index %u, stripe-index %u, old owner %u/%u, "
4108                        "new owner %u/%u: rc = %d\n",
4109                        lfsck_lfsck2name(com->lc_lfsck),
4110                        PFID(lfsck_dto2fid(parent)), PFID(lfsck_dto2fid(child)),
4111                        llr->llr_ost_idx, llr->llr_lov_idx,
4112                        cla->la_uid, cla->la_gid, tla->la_uid, tla->la_gid, rc);
4113
4114         return rc;
4115 }
4116
4117 #define CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid, msg)               \
4118         CDEBUG(D_LFSCK, "%s:("DFID"|"DFID")/"DFID":XATTR %s: %s\n",      \
4119                lfsck_lfsck2name(lfsck), PFID(&lso->lso_fid), PFID(pfid), \
4120                PFID(cfid), XATTR_NAME_FID, msg);
4121
4122 /* Check whether the OST-object correctly back points to the
4123  * MDT-object (@parent) via the XATTR_NAME_FID xattr (@pfid). */
4124 static int lfsck_layout_check_parent(const struct lu_env *env,
4125                                      struct lfsck_component *com,
4126                                      struct lfsck_assistant_object *lso,
4127                                      struct filter_fid *ff,
4128                                      const struct lu_fid *cfid,
4129                                      const struct lu_attr *cla,
4130                                      struct lfsck_layout_req *llr)
4131 {
4132         struct lfsck_thread_info        *info   = lfsck_env_info(env);
4133         struct lu_buf                   *buf    = &info->lti_big_buf;
4134         struct lu_fid                   *pfid   = &info->lti_fid;
4135         struct dt_object                *tobj;
4136         struct lov_mds_md_v1            *lmm;
4137         struct lov_ost_data_v1          *objs;
4138         struct lustre_handle             lh     = { 0 };
4139         struct lfsck_instance           *lfsck  = com->lc_lfsck;
4140         int                              rc;
4141         int                              i;
4142         __u32                            magic;
4143         __u32                            idx;
4144         __u16                            count;
4145         ENTRY;
4146
4147         *pfid = ff->ff_parent;
4148         idx = pfid->f_stripe_idx;
4149         pfid->f_ver = 0;
4150
4151         if (unlikely(!fid_is_sane(pfid))) {
4152                 CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4153                                       "the parent FID is invalid");
4154
4155                 RETURN(LLIT_UNMATCHED_PAIR);
4156         }
4157
4158         if (lu_fid_eq(pfid, &lso->lso_fid)) {
4159                 if (likely(llr->llr_lov_idx == idx))
4160                         RETURN(0);
4161
4162                 CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4163                                       "the stripe index is unmatched");
4164
4165                 RETURN(LLIT_UNMATCHED_PAIR);
4166         }
4167
4168         tobj = lfsck_object_find_bottom(env, com->lc_lfsck, pfid);
4169         if (IS_ERR(tobj))
4170                 RETURN(PTR_ERR(tobj));
4171
4172         if (dt_object_exists(tobj) == 0) {
4173                 CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4174                                       "the parent is nonexistent");
4175
4176                 GOTO(out, rc = LLIT_UNMATCHED_PAIR);
4177         }
4178
4179         if (lfsck_is_dead_obj(tobj)) {
4180                 CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4181                                       "the parent is dead object");
4182
4183                 GOTO(out, rc = LLIT_UNMATCHED_PAIR);
4184         }
4185
4186         if (!S_ISREG(lfsck_object_type(tobj))) {
4187                 CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4188                                       "the parent is not a regular file");
4189
4190                 GOTO(out, rc = LLIT_UNMATCHED_PAIR);
4191         }
4192
4193         /* Load the tobj's layout EA, in spite of it is a local MDT-object or
4194          * remote one on another MDT. Then check whether the given OST-object
4195          * is in such layout. If yes, it is multiple referenced, otherwise it
4196          * is unmatched referenced case. */
4197         rc = lfsck_layout_get_lovea(env, tobj, buf);
4198         if (rc == 0 || rc == -ENODATA || rc == -ENOENT) {
4199                 CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4200                                       "the parent has no stripe data");
4201
4202                 GOTO(out, rc = LLIT_UNMATCHED_PAIR);
4203         }
4204
4205         if (unlikely(rc == -EOPNOTSUPP))
4206                 GOTO(out, rc = LLIT_NONE);
4207
4208         if (rc < 0)
4209                 GOTO(out, rc);
4210
4211         lmm = buf->lb_buf;
4212         magic = le32_to_cpu(lmm->lmm_magic);
4213         if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
4214                 struct lov_comp_md_v1 *lcm = buf->lb_buf;
4215                 struct lov_comp_md_entry_v1 *lcme;
4216
4217                 if (ff->ff_layout.ol_comp_id == 0) {
4218                         CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4219                                               "the parent has incorrect comp_id");
4220
4221                         GOTO(out, rc = LLIT_UNMATCHED_PAIR);
4222                 }
4223
4224                 count = le16_to_cpu(lcm->lcm_entry_count);
4225                 for (i = 0; i < count; i++) {
4226                         lcme = &lcm->lcm_entries[i];
4227                         if (le32_to_cpu(lcme->lcme_id) ==
4228                             ff->ff_layout.ol_comp_id) {
4229                                 lmm = buf->lb_buf +
4230                                         le32_to_cpu(lcme->lcme_offset);
4231                                 magic = le32_to_cpu(lmm->lmm_magic);
4232                                 if (!(le32_to_cpu(lcme->lcme_flags) &
4233                                       LCME_FL_INIT)) {
4234                                         CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid,
4235                                                               cfid,
4236                                                               "the parent has uninitialized component");
4237
4238                                         GOTO(out, rc = LLIT_UNMATCHED_PAIR);
4239                                 }
4240
4241                                 goto further;
4242                         }
4243                 }
4244
4245                 CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4246                                       "the parent has no matched comp_id");
4247
4248                 GOTO(out, rc = LLIT_UNMATCHED_PAIR);
4249         }
4250
4251 further:
4252         if (magic == LOV_MAGIC_V1) {
4253                 objs = &lmm->lmm_objects[0];
4254         } else {
4255                 LASSERT(magic == LOV_MAGIC_V3);
4256                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
4257         }
4258
4259         count = le16_to_cpu(lmm->lmm_stripe_count);
4260         for (i = 0; i < count; i++, objs++) {
4261                 struct lu_fid           *tfid   = &info->lti_fid2;
4262                 struct ost_id           *oi     = &info->lti_oi;
4263                 __u32                    idx2;
4264
4265                 if (lovea_slot_is_dummy(objs))
4266                         continue;
4267
4268                 ostid_le_to_cpu(&objs->l_ost_oi, oi);
4269                 idx2 = le32_to_cpu(objs->l_ost_idx);
4270                 rc = ostid_to_fid(tfid, oi, idx2);
4271                 if (rc != 0) {
4272                         CDEBUG(D_LFSCK, "%s: the parent "DFID" contains "
4273                                "invalid layout EA at the slot %d, index %u\n",
4274                                lfsck_lfsck2name(com->lc_lfsck),
4275                                PFID(pfid), i, idx2);
4276
4277                         GOTO(out, rc = LLIT_UNMATCHED_PAIR);
4278                 }
4279
4280                 if (lu_fid_eq(cfid, tfid)) {
4281                         rc = lfsck_ibits_lock(env, com->lc_lfsck, tobj, &lh,
4282                                               MDS_INODELOCK_UPDATE |
4283                                               MDS_INODELOCK_LAYOUT |
4284                                               MDS_INODELOCK_XATTR,
4285                                               LCK_EX);
4286                         if (rc != 0)
4287                                 GOTO(out, rc);
4288
4289                         dt_read_lock(env, tobj, 0);
4290
4291                         /* For local MDT-object, re-check existence
4292                          * after taken the lock. */
4293                         if (!dt_object_remote(tobj)) {
4294                                 if (dt_object_exists(tobj) == 0 ||
4295                                     lfsck_is_dead_obj(tobj)) {
4296                                         CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid,
4297                                                               cfid,
4298                                                               "the parent doesn't exist anymore after lock");
4299
4300                                         rc = LLIT_UNMATCHED_PAIR;
4301                                 } else {
4302                                         rc = LLIT_MULTIPLE_REFERENCED;
4303                                 }
4304
4305                                 GOTO(unlock, rc);
4306                         }
4307
4308                         /* For migration case, the new MDT-object and old
4309                          * MDT-object may reference the same OST-object at
4310                          * some migration internal time.
4311                          *
4312                          * For remote MDT-object, the local MDT may not know
4313                          * whether it has been removed or not.  Try checking
4314                          * for a non-existent xattr to check if this object
4315                          * has been been removed or not. */
4316                         rc = dt_xattr_get(env, tobj, &LU_BUF_NULL,
4317                                           XATTR_NAME_DUMMY);
4318                         if (unlikely(rc == -ENOENT || rc >= 0)) {
4319                                 CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4320                                                       "the parent is remote object and nonexistent after lock");
4321
4322                                 rc = LLIT_UNMATCHED_PAIR;
4323                         } else if (rc == -ENODATA) {
4324                                 rc = LLIT_MULTIPLE_REFERENCED;
4325                         }
4326
4327                         GOTO(unlock, rc);
4328                 }
4329         }
4330
4331         CDEBUG_UNMATCHED_PAIR(lfsck, lso, pfid, cfid,
4332                               "the parent has no matched stripe");
4333
4334         GOTO(out, rc = LLIT_UNMATCHED_PAIR);
4335
4336 unlock:
4337         if (lustre_handle_is_used(&lh)) {
4338                 dt_read_unlock(env, tobj);
4339                 lfsck_ibits_unlock(&lh, LCK_EX);
4340         }
4341
4342 out:
4343         lfsck_object_put(env, tobj);
4344
4345         return rc;
4346 }
4347
4348 static int lfsck_layout_assistant_handler_p1(const struct lu_env *env,
4349                                              struct lfsck_component *com,
4350                                              struct lfsck_assistant_req *lar)
4351 {
4352         struct lfsck_layout_req              *llr    =
4353                 container_of(lar, struct lfsck_layout_req, llr_lar);
4354         struct lfsck_assistant_object        *lso    = lar->lar_parent;
4355         struct lfsck_layout                  *lo     = com->lc_file_ram;
4356         struct lfsck_thread_info             *info   = lfsck_env_info(env);
4357         struct filter_fid                    *ff     = &info->lti_ff;
4358         struct lu_buf buf = { .lb_buf = ff,
4359                               .lb_len = sizeof(*ff) };
4360         struct dt_object                     *parent = NULL;
4361         struct dt_object                     *child  = llr->llr_child;
4362         struct lu_attr                       *pla    = &lso->lso_attr;
4363         struct lu_attr                       *cla    = &info->lti_la;
4364         struct lfsck_instance                *lfsck  = com->lc_lfsck;
4365         struct lfsck_bookmark                *bk     = &lfsck->li_bookmark_ram;
4366         enum lfsck_layout_inconsistency_type  type   = LLIT_NONE;
4367         int                                   rc;
4368         ENTRY;
4369
4370         if (lso->lso_dead)
4371                 RETURN(0);
4372
4373         CFS_FAIL_TIMEOUT(OBD_FAIL_LFSCK_ENGINE_DELAY, cfs_fail_val);
4374
4375         rc = dt_attr_get(env, child, cla);
4376         if (rc == -ENOENT) {
4377                 parent = lfsck_assistant_object_load(env, lfsck, lso);
4378                 if (IS_ERR(parent)) {
4379                         rc = PTR_ERR(parent);
4380
4381                         RETURN(rc == -ENOENT ? 0 : rc);
4382                 }
4383
4384                 type = LLIT_DANGLING;
4385                 goto repair;
4386         }
4387
4388         if (rc != 0)
4389                 GOTO(out, rc);
4390
4391         lfsck_buf_init(&buf, ff, sizeof(*ff));
4392         rc = dt_xattr_get(env, child, &buf, XATTR_NAME_FID);
4393         if (unlikely(rc > 0 && rc < sizeof(struct lu_fid))) {
4394                 CDEBUG(D_LFSCK, "%s:"DFID"/"DFID": "
4395                        "the child object's %s is corrupted\n",
4396                        lfsck_lfsck2name(lfsck), PFID(&lso->lso_fid),
4397                        PFID(lu_object_fid(&child->do_lu)),
4398                        XATTR_NAME_FID);
4399
4400                 type = LLIT_UNMATCHED_PAIR;
4401                 goto repair;
4402         }
4403
4404         if (rc < 0 && rc != -ENODATA)
4405                 GOTO(out, rc);
4406
4407         if (rc == 0 || rc == -ENODATA)
4408                 GOTO(check_owner, rc = 0);
4409
4410         filter_fid_le_to_cpu(ff, ff, sizeof(*ff));
4411         rc = lfsck_layout_check_parent(env, com, lso, ff,
4412                                        lu_object_fid(&child->do_lu), cla, llr);
4413         if (rc > 0) {
4414                 type = rc;
4415                 goto repair;
4416         }
4417
4418         if (rc < 0)
4419                 GOTO(out, rc);
4420
4421 check_owner:
4422         /* Someone may has changed the owner after the parent attr pre-loaded.
4423          * It can be handled later inside the lfsck_layout_repair_owner(). */
4424         if (unlikely(cla->la_uid != pla->la_uid ||
4425                      cla->la_gid != pla->la_gid)) {
4426                 type = LLIT_INCONSISTENT_OWNER;
4427                 goto repair;
4428         }
4429
4430 repair:
4431         if (type == LLIT_NONE)
4432                 GOTO(out, rc = 0);
4433
4434         if (bk->lb_param & LPF_DRYRUN)
4435                 GOTO(out, rc = 1);
4436
4437         if (parent == NULL) {
4438                 parent = lfsck_assistant_object_load(env, lfsck, lso);
4439                 if (IS_ERR(parent)) {
4440                         rc = PTR_ERR(parent);
4441
4442                         if (rc == -ENOENT)
4443                                 RETURN(0);
4444
4445                         GOTO(out, rc);
4446                 }
4447         }
4448
4449         switch (type) {
4450         case LLIT_DANGLING:
4451                 if (bk->lb_param & LPF_DELAY_CREATE_OSTOBJ)
4452                         rc = lfsck_layout_ins_dangling_rec(env, com,
4453                                 lfsck_dto2fid(parent), lfsck_dto2fid(child),
4454                                 llr->llr_comp_id, llr->llr_lov_idx,
4455                                 llr->llr_ost_idx);
4456                 else
4457                         rc = __lfsck_layout_repair_dangling(env, com, parent,
4458                                                             llr->llr_child,
4459                                                             llr->llr_comp_id,
4460                                                             llr->llr_lov_idx,
4461                                                             llr->llr_ost_idx,
4462                                                             true);
4463                 break;
4464         case LLIT_UNMATCHED_PAIR:
4465                 rc = lfsck_layout_repair_unmatched_pair(env, com, parent,
4466                                                         llr, pla);
4467                 break;
4468         case LLIT_MULTIPLE_REFERENCED:
4469                 rc = lfsck_layout_repair_multiple_references(env, com, parent,
4470                                                              llr, pla);
4471                 break;
4472         case LLIT_INCONSISTENT_OWNER:
4473                 rc = lfsck_layout_repair_owner(env, com, parent, llr, pla, cla);
4474                 break;
4475         default:
4476                 rc = 0;
4477                 break;
4478         }
4479
4480         GOTO(out, rc);
4481
4482 out:
4483         down_write(&com->lc_sem);
4484         if (rc < 0) {
4485                 struct lfsck_assistant_data *lad = com->lc_data;
4486
4487                 if (unlikely(test_bit(LAD_EXIT, &lad->lad_flags))) {
4488                         rc = 0;
4489                 } else if (rc == -ENOTCONN || rc == -ESHUTDOWN ||
4490                            rc == -ETIMEDOUT || rc == -EHOSTDOWN ||
4491                            rc == -EHOSTUNREACH) {
4492                         /* If cannot touch the target server,
4493                          * mark the LFSCK as INCOMPLETE. */
4494                         CDEBUG(D_LFSCK, "%s: layout LFSCK assistant fail to "
4495                                "talk with OST %x: rc = %d\n",
4496                                lfsck_lfsck2name(lfsck), llr->llr_ost_idx, rc);
4497                         lfsck_lad_set_bitmap(env, com, llr->llr_ost_idx);
4498                         lo->ll_objs_skipped++;
4499                         rc = 0;
4500                 } else {
4501                         lfsck_layout_record_failure(env, lfsck, lo);
4502                 }
4503         } else if (rc > 0 && (type != LLIT_DANGLING ||
4504                               !(bk->lb_param & LPF_DELAY_CREATE_OSTOBJ))) {
4505                 LASSERTF(type > LLIT_NONE && type <= LLIT_MAX,
4506                          "unknown type = %d\n", type);
4507
4508                 lo->ll_objs_repaired[type - 1]++;
4509                 if (bk->lb_param & LPF_DRYRUN &&
4510                     unlikely(lo->ll_pos_first_inconsistent == 0))
4511                         lo->ll_pos_first_inconsistent =
4512                         lfsck->li_obj_oit->do_index_ops->dio_it.store(env,
4513                                                         lfsck->li_di_oit);
4514         }
4515         up_write(&com->lc_sem);
4516
4517         if (parent != NULL && !IS_ERR(parent))
4518                 lfsck_object_put(env, parent);
4519
4520         return rc;
4521 }
4522
4523 static int
4524 lfsck_layout_double_scan_one_trace_file(const struct lu_env *env,
4525                                         struct lfsck_component *com,
4526                                         struct dt_object *obj, bool first)
4527 {
4528         struct lfsck_instance *lfsck = com->lc_lfsck;
4529         struct ptlrpc_thread *thread = &lfsck->li_thread;
4530         struct lfsck_bookmark *bk = &lfsck->li_bookmark_ram;
4531         struct lfsck_layout *lo = com->lc_file_ram;
4532         const struct dt_it_ops *iops = &obj->do_index_ops->dio_it;
4533         struct dt_it *di;
4534         struct dt_key *key;
4535         struct lfsck_layout_dangling_key *parent =
4536                                         &lfsck_env_info(env)->lti_lldk;
4537         struct lu_fid *cfid = &lfsck_env_info(env)->lti_fid3;
4538         __u32 ost_idx;
4539         int rc;
4540         ENTRY;
4541
4542         di = iops->init(env, obj, 0);
4543         if (IS_ERR(di))
4544                 RETURN(PTR_ERR(di));
4545
4546         if (first)
4547                 lldk_cpu_to_be(parent, &lo->ll_lldk_latest_scanned_phase2);
4548         else
4549                 memset(parent, 0, sizeof(*parent));
4550         rc = iops->get(env, di, (const struct dt_key *)parent);
4551         if (rc < 0)
4552                 GOTO(fini, rc);
4553
4554         if (first) {
4555                 /* The start one either has been processed or does not exist,
4556                  * skip it. */
4557                 rc = iops->next(env, di);
4558                 if (rc != 0)
4559                         GOTO(put, rc);
4560         }
4561
4562         do {
4563                 if (CFS_FAIL_TIMEOUT(OBD_FAIL_LFSCK_DELAY3, cfs_fail_val) &&
4564                     unlikely(!thread_is_running(thread)))
4565                         GOTO(put, rc = 0);
4566
4567                 key = iops->key(env, di);
4568                 if (IS_ERR(key)) {
4569                         rc = PTR_ERR(key);
4570                         if (rc == -ENOENT)
4571                                 GOTO(put, rc = 1);
4572
4573                         goto checkpoint;
4574                 }
4575
4576                 lldk_be_to_cpu(parent,
4577                                 (const struct lfsck_layout_dangling_key *)key);
4578                 if (!fid_is_sane(&parent->lldk_fid)) {
4579                         rc = 0;
4580                         goto checkpoint;
4581                 }
4582
4583                 rc = iops->rec(env, di, (struct dt_rec *)cfid, 0);
4584                 if (rc == 0) {
4585                         fid_be_to_cpu(cfid, cfid);
4586                         ost_idx = cfid->f_ver;
4587                         cfid->f_ver = 0;
4588                         if (!fid_is_sane(cfid)) {
4589                                 rc = 0;
4590                                 goto checkpoint;
4591                         }
4592
4593                         rc = lfsck_layout_repair_dangling(env, com,
4594                                         &parent->lldk_fid, cfid,
4595                                         parent->lldk_comp_id,
4596                                         parent->lldk_ea_off, ost_idx);
4597                 }
4598
4599 checkpoint:
4600                 down_write(&com->lc_sem);
4601                 com->lc_new_checked++;
4602                 com->lc_new_scanned++;
4603                 if (rc >= 0)
4604                         lo->ll_lldk_latest_scanned_phase2 = *parent;
4605
4606                 if (rc > 0)
4607                         lo->ll_objs_repaired[LLIT_DANGLING - 1]++;
4608                 else if (rc < 0)
4609                         lo->ll_objs_failed_phase2++;
4610                 up_write(&com->lc_sem);
4611
4612                 if (rc < 0 && bk->lb_param & LPF_FAILOUT)
4613                         GOTO(put, rc);
4614
4615                 if (unlikely(com->lc_time_next_checkpoint <=
4616                              ktime_get_seconds()) &&
4617                     com->lc_new_checked != 0) {
4618                         down_write(&com->lc_sem);
4619                         lo->ll_run_time_phase2 += ktime_get_seconds() -
4620                                                   com->lc_time_last_checkpoint;
4621                         lo->ll_time_last_checkpoint = ktime_get_real_seconds();
4622                         lo->ll_objs_checked_phase2 += com->lc_new_checked;
4623                         com->lc_new_checked = 0;
4624                         lfsck_layout_store(env, com);
4625                         up_write(&com->lc_sem);
4626
4627                         com->lc_time_last_checkpoint = ktime_get_seconds();
4628                         com->lc_time_next_checkpoint =
4629                                 com->lc_time_last_checkpoint +
4630                                 LFSCK_CHECKPOINT_INTERVAL;
4631                 }
4632
4633                 lfsck_control_speed_by_self(com);
4634                 if (unlikely(!thread_is_running(thread)))
4635                         GOTO(put, rc = 0);
4636
4637                 rc = iops->next(env, di);
4638         } while (rc == 0);
4639
4640         GOTO(put, rc);
4641
4642 put:
4643         iops->put(env, di);
4644
4645 fini:
4646         iops->fini(env, di);
4647
4648         return rc;
4649 }
4650
4651 static int lfsck_layout_assistant_handler_p2(const struct lu_env *env,
4652                                              struct lfsck_component *com)
4653 {
4654         struct lfsck_assistant_data     *lad    = com->lc_data;
4655         struct lfsck_instance           *lfsck  = com->lc_lfsck;
4656         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
4657         struct lfsck_tgt_descs          *ltds   = &lfsck->li_ost_descs;
4658         struct lfsck_tgt_desc           *ltd;
4659         int                              rc     = 0;
4660         ENTRY;
4661
4662         CDEBUG(D_LFSCK, "%s: layout LFSCK phase2 scan start\n",
4663                lfsck_lfsck2name(lfsck));
4664
4665         spin_lock(&ltds->ltd_lock);
4666         while (!list_empty(&lad->lad_ost_phase2_list)) {
4667                 ltd = list_entry(lad->lad_ost_phase2_list.next,
4668                                  struct lfsck_tgt_desc,
4669                                  ltd_layout_phase_list);
4670                 list_del_init(&ltd->ltd_layout_phase_list);
4671                 if (bk->lb_param & LPF_OST_ORPHAN) {
4672                         spin_unlock(&ltds->ltd_lock);
4673                         rc = lfsck_layout_scan_orphan(env, com, ltd);
4674                         if (rc != 0 && bk->lb_param & LPF_FAILOUT)
4675                                 RETURN(rc);
4676
4677                         if (unlikely(test_bit(LAD_EXIT, &lad->lad_flags) ||
4678                                      !thread_is_running(&lfsck->li_thread)))
4679                                 RETURN(0);
4680                         spin_lock(&ltds->ltd_lock);
4681                 }
4682         }
4683
4684         if (list_empty(&lad->lad_ost_phase1_list))
4685                 rc = 1;
4686         else
4687                 rc = 0;
4688         spin_unlock(&ltds->ltd_lock);
4689
4690         if (rc == 1 && bk->lb_param & LPF_OST_ORPHAN) {
4691                 struct lfsck_layout *lo = com->lc_file_ram;
4692                 int i;
4693
4694                 com->lc_new_checked = 0;
4695                 com->lc_new_scanned = 0;
4696                 com->lc_time_last_checkpoint = ktime_get_seconds();
4697                 com->lc_time_next_checkpoint = com->lc_time_last_checkpoint +
4698                                                LFSCK_CHECKPOINT_INTERVAL;
4699
4700                 i = lfsck_sub_trace_file_fid2idx(
4701                                 &lo->ll_lldk_latest_scanned_phase2.lldk_fid);
4702                 rc = lfsck_layout_double_scan_one_trace_file(env, com,
4703                                 com->lc_sub_trace_objs[i].lsto_obj, true);
4704                 while (rc > 0 && ++i < LFSCK_STF_COUNT)
4705                         rc = lfsck_layout_double_scan_one_trace_file(env, com,
4706                                 com->lc_sub_trace_objs[i].lsto_obj, false);
4707
4708                 CDEBUG(D_LFSCK, "%s: layout LFSCK phase2 scan dangling stop "
4709                        "at the No. %d trace file: rc = %d\n",
4710                        lfsck_lfsck2name(lfsck), i, rc);
4711         }
4712
4713         CDEBUG(D_LFSCK, "%s: layout LFSCK phase2 scan stop: rc = %d\n",
4714                lfsck_lfsck2name(lfsck), rc);
4715
4716         RETURN(rc);
4717 }
4718
4719 static int
4720 lfsck_layout_slave_async_interpret(const struct lu_env *env,
4721                                    struct ptlrpc_request *req,
4722                                    void *args, int rc)
4723 {
4724         struct lfsck_layout_slave_async_args *llsaa = args;
4725         struct obd_export *exp = llsaa->llsaa_exp;
4726         struct lfsck_component *com = llsaa->llsaa_com;
4727         struct lfsck_layout_slave_target *llst = llsaa->llsaa_llst;
4728         struct lfsck_layout_slave_data *llsd = com->lc_data;
4729         struct lfsck_reply *lr = NULL;
4730         bool done = false;
4731
4732         if (rc != 0) {
4733                 /* It is probably caused by network trouble, or target crash,
4734                  * it will try several times (depends on the obd_timeout, and
4735                  * will not less than 3 times). But to make the LFSCK can go
4736                  * ahead, we should not try for ever. After some try but still
4737                  * hit failure, it will assume that the target exit the LFSCK
4738                  * prcoessing and stop try. */
4739                 if (rc == -ENOTCONN || rc == -ESHUTDOWN) {
4740                         int max_try = max_t(int, obd_timeout / 30, 3);
4741
4742                         if (++(llst->llst_failures) > max_try)
4743                                 done = true;
4744                 } else {
4745                         done = true;
4746                 }
4747         } else {
4748                 llst->llst_failures = 0;
4749                 lr = req_capsule_server_get(&req->rq_pill, &RMF_LFSCK_REPLY);
4750                 if (lr->lr_status != LS_SCANNING_PHASE1 &&
4751                     lr->lr_status != LS_SCANNING_PHASE2)
4752                         done = true;
4753         }
4754
4755         if (done) {
4756                 CDEBUG(D_LFSCK, "%s: layout LFSCK slave gets the MDT %x "
4757                        "status %d, failures_try %d\n", lfsck_lfsck2name(com->lc_lfsck),
4758                        llst->llst_index, lr != NULL ? lr->lr_status : rc,
4759                        llst->llst_failures);
4760
4761                 lfsck_layout_llst_del(llsd, llst);
4762         }
4763
4764         lfsck_layout_llst_put(llst);
4765         lfsck_component_put(env, com);
4766         class_export_put(exp);
4767
4768         return 0;
4769 }
4770
4771 static int lfsck_layout_async_query(const struct lu_env *env,
4772                                     struct lfsck_component *com,
4773                                     struct obd_export *exp,
4774                                     struct lfsck_layout_slave_target *llst,
4775                                     struct lfsck_request *lr,
4776                                     struct ptlrpc_request_set *set)
4777 {
4778         struct lfsck_layout_slave_async_args *llsaa;
4779         struct ptlrpc_request                *req;
4780         struct lfsck_request                 *tmp;
4781         int                                   rc;
4782         ENTRY;
4783
4784         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LFSCK_QUERY);
4785         if (req == NULL)
4786                 RETURN(-ENOMEM);
4787
4788         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, LFSCK_QUERY);
4789         if (rc != 0) {
4790                 ptlrpc_request_free(req);
4791                 RETURN(rc);
4792         }
4793
4794         tmp = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
4795         *tmp = *lr;
4796         ptlrpc_request_set_replen(req);
4797
4798         llsaa = ptlrpc_req_async_args(llsaa, req);
4799         llsaa->llsaa_exp = exp;
4800         llsaa->llsaa_com = lfsck_component_get(com);
4801         llsaa->llsaa_llst = llst;
4802         req->rq_interpret_reply = lfsck_layout_slave_async_interpret;
4803         req->rq_allow_intr = 1;
4804         req->rq_no_delay = 1;
4805         ptlrpc_set_add_req(set, req);
4806
4807         RETURN(0);
4808 }
4809
4810 static int lfsck_layout_async_notify(const struct lu_env *env,
4811                                      struct obd_export *exp,
4812                                      struct lfsck_request *lr,
4813                                      struct ptlrpc_request_set *set)
4814 {
4815         struct ptlrpc_request   *req;
4816         struct lfsck_request    *tmp;
4817         int                      rc;
4818         ENTRY;
4819
4820         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LFSCK_NOTIFY);
4821         if (req == NULL)
4822                 RETURN(-ENOMEM);
4823
4824         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, LFSCK_NOTIFY);
4825         if (rc != 0) {
4826                 ptlrpc_request_free(req);
4827                 RETURN(rc);
4828         }
4829
4830         tmp = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
4831         *tmp = *lr;
4832         ptlrpc_request_set_replen(req);
4833         req->rq_allow_intr = 1;
4834         req->rq_no_delay = 1;
4835         ptlrpc_set_add_req(set, req);
4836
4837         RETURN(0);
4838 }
4839
4840 static int
4841 lfsck_layout_slave_query_master(const struct lu_env *env,
4842                                 struct lfsck_component *com)
4843 {
4844         struct lfsck_request             *lr    = &lfsck_env_info(env)->lti_lr;
4845         struct lfsck_instance            *lfsck = com->lc_lfsck;
4846         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
4847         struct lfsck_layout_slave_target *llst;
4848         struct obd_export                *exp;
4849         struct ptlrpc_request_set        *set;
4850         int                               rc    = 0;
4851         int                               rc1   = 0;
4852         ENTRY;
4853
4854         set = ptlrpc_prep_set();
4855         if (set == NULL)
4856                 GOTO(log, rc = -ENOMEM);
4857
4858         memset(lr, 0, sizeof(*lr));
4859         lr->lr_event = LE_QUERY;
4860         lr->lr_active = LFSCK_TYPE_LAYOUT;
4861
4862         llsd->llsd_touch_gen++;
4863         spin_lock(&llsd->llsd_lock);
4864         while (!list_empty(&llsd->llsd_master_list)) {
4865                 llst = list_entry(llsd->llsd_master_list.next,
4866                                   struct lfsck_layout_slave_target,
4867                                   llst_list);
4868                 if (llst->llst_gen == llsd->llsd_touch_gen)
4869                         break;
4870
4871                 llst->llst_gen = llsd->llsd_touch_gen;
4872                 list_move_tail(&llst->llst_list,
4873                                &llsd->llsd_master_list);
4874                 atomic_inc(&llst->llst_ref);
4875                 spin_unlock(&llsd->llsd_lock);
4876
4877                 exp = lustre_find_lwp_by_index(lfsck->li_obd->obd_name,
4878                                                llst->llst_index);
4879                 if (exp == NULL) {
4880                         lfsck_layout_llst_del(llsd, llst);
4881                         lfsck_layout_llst_put(llst);
4882                         spin_lock(&llsd->llsd_lock);
4883                         continue;
4884                 }
4885
4886                 rc = lfsck_layout_async_query(env, com, exp, llst, lr, set);
4887                 if (rc != 0) {
4888                         CDEBUG(D_LFSCK, "%s: layout LFSCK slave fail to "
4889                                "query %s for layout: rc = %d\n",
4890                                lfsck_lfsck2name(lfsck),
4891                                exp->exp_obd->obd_name, rc);
4892
4893                         rc1 = rc;
4894                         lfsck_layout_llst_put(llst);
4895                         class_export_put(exp);
4896                 }
4897                 spin_lock(&llsd->llsd_lock);
4898         }
4899         spin_unlock(&llsd->llsd_lock);
4900
4901         rc = ptlrpc_set_wait(env, set);
4902         ptlrpc_set_destroy(set);
4903
4904         GOTO(log, rc = (rc1 != 0 ? rc1 : rc));
4905
4906 log:
4907         CDEBUG(D_LFSCK, "%s: layout LFSCK slave queries master: rc = %d\n",
4908                lfsck_lfsck2name(com->lc_lfsck), rc);
4909
4910         return rc;
4911 }
4912
4913 static void
4914 lfsck_layout_slave_notify_master(const struct lu_env *env,
4915                                  struct lfsck_component *com,
4916                                  enum lfsck_events event, int result)
4917 {
4918         struct lfsck_layout              *lo    = com->lc_file_ram;
4919         struct lfsck_instance            *lfsck = com->lc_lfsck;
4920         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
4921         struct lfsck_request             *lr    = &lfsck_env_info(env)->lti_lr;
4922         struct lfsck_layout_slave_target *llst;
4923         struct obd_export                *exp;
4924         struct ptlrpc_request_set        *set;
4925         int                               rc;
4926         ENTRY;
4927
4928         CDEBUG(D_LFSCK, "%s: layout LFSCK slave notifies master\n",
4929                lfsck_lfsck2name(com->lc_lfsck));
4930
4931         set = ptlrpc_prep_set();
4932         if (set == NULL)
4933                 RETURN_EXIT;
4934
4935         memset(lr, 0, sizeof(*lr));
4936         lr->lr_event = event;
4937         lr->lr_flags = LEF_FROM_OST;
4938         lr->lr_status = result;
4939         lr->lr_index = lfsck_dev_idx(lfsck);
4940         lr->lr_active = LFSCK_TYPE_LAYOUT;
4941         lr->lr_flags2 = lo->ll_flags;
4942         llsd->llsd_touch_gen++;
4943         spin_lock(&llsd->llsd_lock);
4944         while (!list_empty(&llsd->llsd_master_list)) {
4945                 llst = list_entry(llsd->llsd_master_list.next,
4946                                   struct lfsck_layout_slave_target,
4947                                   llst_list);
4948                 if (llst->llst_gen == llsd->llsd_touch_gen)
4949                         break;
4950
4951                 llst->llst_gen = llsd->llsd_touch_gen;
4952                 list_move_tail(&llst->llst_list,
4953                                &llsd->llsd_master_list);
4954                 atomic_inc(&llst->llst_ref);
4955                 spin_unlock(&llsd->llsd_lock);
4956
4957                 exp = lustre_find_lwp_by_index(lfsck->li_obd->obd_name,
4958                                                llst->llst_index);
4959                 if (exp == NULL) {
4960                         lfsck_layout_llst_del(llsd, llst);
4961                         lfsck_layout_llst_put(llst);
4962                         spin_lock(&llsd->llsd_lock);
4963                         continue;
4964                 }
4965
4966                 rc = lfsck_layout_async_notify(env, exp, lr, set);
4967                 if (rc != 0)
4968                         CDEBUG(D_LFSCK, "%s: layout LFSCK slave fail to "
4969                                "notify %s for layout: rc = %d\n",
4970                                lfsck_lfsck2name(lfsck),
4971                                exp->exp_obd->obd_name, rc);
4972
4973                 lfsck_layout_llst_put(llst);
4974                 class_export_put(exp);
4975                 spin_lock(&llsd->llsd_lock);
4976         }
4977         spin_unlock(&llsd->llsd_lock);
4978
4979         ptlrpc_set_wait(env, set);
4980         ptlrpc_set_destroy(set);
4981
4982         RETURN_EXIT;
4983 }
4984
4985 /*
4986  * \ret -ENODATA: unrecognized stripe
4987  * \ret = 0     : recognized stripe
4988  * \ret < 0     : other failures
4989  */
4990 static int lfsck_layout_master_check_pairs(const struct lu_env *env,
4991                                            struct lfsck_component *com,
4992                                            struct lu_fid *cfid,
4993                                            struct lu_fid *pfid, __u32 comp_id)
4994 {
4995         struct lfsck_thread_info        *info   = lfsck_env_info(env);
4996         struct lu_buf                   *buf    = &info->lti_big_buf;
4997         struct ost_id                   *oi     = &info->lti_oi;
4998         struct dt_object                *obj;
4999         struct lov_mds_md_v1            *lmm;
5000         struct lov_ost_data_v1          *objs;
5001         __u32                            idx    = pfid->f_stripe_idx;
5002         __u32                            magic;
5003         int                              rc     = 0;
5004         int                              i;
5005         __u16                            count;
5006         ENTRY;
5007
5008         pfid->f_ver = 0;
5009         obj = lfsck_object_find_bottom(env, com->lc_lfsck, pfid);
5010         if (IS_ERR(obj))
5011                 RETURN(PTR_ERR(obj));
5012
5013         dt_read_lock(env, obj, 0);
5014         if (unlikely(dt_object_exists(obj) == 0 ||
5015                      lfsck_is_dead_obj(obj)))
5016                 GOTO(unlock, rc = -ENOENT);
5017
5018         if (!S_ISREG(lfsck_object_type(obj)))
5019                 GOTO(unlock, rc = -ENODATA);
5020
5021         rc = lfsck_layout_get_lovea(env, obj, buf);
5022         if (rc < 0)
5023                 GOTO(unlock, rc);
5024
5025         lmm = buf->lb_buf;
5026         magic = le32_to_cpu(lmm->lmm_magic);
5027         if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
5028                 struct lov_comp_md_v1 *lcm = buf->lb_buf;
5029                 struct lov_comp_md_entry_v1 *lcme;
5030
5031                 if (comp_id == 0)
5032                         GOTO(unlock, rc = -ENODATA);
5033
5034                 count = le16_to_cpu(lcm->lcm_entry_count);
5035                 for (i = 0; i < count; i++) {
5036                         lcme = &lcm->lcm_entries[i];
5037                         if (le32_to_cpu(lcme->lcme_id) == comp_id) {
5038                                 lmm = buf->lb_buf +
5039                                         le32_to_cpu(lcme->lcme_offset);
5040                                 magic = le32_to_cpu(lmm->lmm_magic);
5041                                 if (!(le32_to_cpu(lcme->lcme_flags) &
5042                                       LCME_FL_INIT))
5043                                         GOTO(unlock, rc = -ENODATA);
5044
5045                                 goto further;
5046                         }
5047                 }
5048
5049                 GOTO(unlock, rc = -ENODATA);
5050         }
5051
5052 further:
5053         if (magic == LOV_MAGIC_V1) {
5054                 objs = &lmm->lmm_objects[0];
5055         } else {
5056                 LASSERT(magic == LOV_MAGIC_V3);
5057                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
5058         }
5059
5060         fid_to_ostid(cfid, oi);
5061         count = le16_to_cpu(lmm->lmm_stripe_count);
5062         for (i = 0; i < count; i++, objs++) {
5063                 struct ost_id oi2;
5064
5065                 ostid_le_to_cpu(&objs->l_ost_oi, &oi2);
5066                 if (memcmp(oi, &oi2, sizeof(*oi)) == 0)
5067                         GOTO(unlock, rc = (i != idx ? -ENODATA : 0));
5068         }
5069
5070         GOTO(unlock, rc = -ENODATA);
5071
5072 unlock:
5073         dt_read_unlock(env, obj);
5074         lfsck_object_put(env, obj);
5075
5076         return rc;
5077 }
5078
5079 /*
5080  * The LFSCK-on-OST will ask the LFSCK-on-MDT to check whether the given
5081  * MDT-object/OST-object pairs match or not to aviod transfer MDT-object
5082  * layout EA from MDT to OST. On one hand, the OST no need to understand
5083  * the layout EA structure; on the other hand, it may cause trouble when
5084  * transfer large layout EA from MDT to OST via normal OUT RPC.
5085  *
5086  * \ret > 0: unrecognized stripe
5087  * \ret = 0: recognized stripe
5088  * \ret < 0: other failures
5089  */
5090 static int lfsck_layout_slave_check_pairs(const struct lu_env *env,
5091                                           struct lfsck_component *com,
5092                                           struct lu_fid *cfid,
5093                                           struct lu_fid *pfid, __u32 comp_id)
5094 {
5095         struct lfsck_instance    *lfsck  = com->lc_lfsck;
5096         struct obd_device        *obd    = lfsck->li_obd;
5097         struct seq_server_site   *ss     = lfsck_dev_site(lfsck);
5098         struct obd_export        *exp    = NULL;
5099         struct ptlrpc_request    *req    = NULL;
5100         struct lfsck_request     *lr;
5101         struct lu_seq_range      *range  = &lfsck_env_info(env)->lti_range;
5102         int                       rc     = 0;
5103         ENTRY;
5104
5105         if (unlikely(fid_is_idif(pfid)))
5106                 RETURN(1);
5107
5108         fld_range_set_any(range);
5109         rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(pfid), range);
5110         if (rc != 0)
5111                 RETURN(rc == -ENOENT ? 1 : rc);
5112
5113         if (unlikely(!fld_range_is_mdt(range)))
5114                 RETURN(1);
5115
5116         exp = lustre_find_lwp_by_index(obd->obd_name, range->lsr_index);
5117         if (unlikely(exp == NULL))
5118                 RETURN(1);
5119
5120         if (!(exp_connect_flags(exp) & OBD_CONNECT_LFSCK))
5121                 GOTO(out, rc = -EOPNOTSUPP);
5122
5123         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LFSCK_NOTIFY);
5124         if (req == NULL)
5125                 GOTO(out, rc = -ENOMEM);
5126
5127         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, LFSCK_NOTIFY);
5128         if (rc != 0) {
5129                 ptlrpc_request_free(req);
5130
5131                 GOTO(out, rc);
5132         }
5133
5134         lr = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
5135         memset(lr, 0, sizeof(*lr));
5136         lr->lr_event = LE_PAIRS_VERIFY;
5137         lr->lr_active = LFSCK_TYPE_LAYOUT;
5138         lr->lr_fid = *cfid; /* OST-object itself FID. */
5139         lr->lr_fid2 = *pfid; /* The claimed parent FID. */
5140         lr->lr_comp_id = comp_id;
5141
5142         ptlrpc_request_set_replen(req);
5143         rc = ptlrpc_queue_wait(req);
5144         ptlrpc_req_finished(req);
5145
5146         if (rc == -ENOENT || rc == -ENODATA)
5147                 rc = 1;
5148
5149         GOTO(out, rc);
5150
5151 out:
5152         if (exp != NULL)
5153                 class_export_put(exp);
5154
5155         return rc;
5156 }
5157
5158 static int lfsck_layout_slave_repair_pfid(const struct lu_env *env,
5159                                           struct lfsck_component *com,
5160                                           struct lfsck_req_local *lrl)
5161 {
5162         struct dt_object        *obj;
5163         int                      rc     = 0;
5164         ENTRY;
5165
5166         obj = lfsck_object_find_bottom(env, com->lc_lfsck, &lrl->lrl_fid);
5167         if (IS_ERR(obj))
5168                 GOTO(log, rc = PTR_ERR(obj));
5169
5170         dt_write_lock(env, obj, 0);
5171         if (unlikely(dt_object_exists(obj) == 0 ||
5172                      lfsck_is_dead_obj(obj)))
5173                 GOTO(unlock, rc = 0);
5174
5175         rc = __lfsck_layout_update_pfid(env, com, obj,
5176                                         &lrl->lrl_ff_client.ff_parent,
5177                                         &lrl->lrl_ff_client.ff_layout,
5178                                         lrl->lrl_ff_client.ff_layout_version,
5179                                         lrl->lrl_ff_client.ff_range,
5180                                         lrl->lrl_ff_client.ff_parent.f_ver);
5181
5182         GOTO(unlock, rc);
5183
5184 unlock:
5185         dt_write_unlock(env, obj);
5186         lfsck_object_put(env, obj);
5187
5188 log:
5189         CDEBUG(D_LFSCK, "%s: layout LFSCK slave repaired pfid for "DFID
5190                ", parent "DFID": rc = %d\n", lfsck_lfsck2name(com->lc_lfsck),
5191                PFID(&lrl->lrl_fid), PFID(&lrl->lrl_ff_client.ff_parent), rc);
5192
5193         return rc;
5194 }
5195
5196 /* layout APIs */
5197
5198 static void lfsck_layout_slave_quit(const struct lu_env *env,
5199                                     struct lfsck_component *com);
5200
5201 static int lfsck_layout_reset(const struct lu_env *env,
5202                               struct lfsck_component *com, bool init)
5203 {
5204         struct lfsck_layout     *lo    = com->lc_file_ram;
5205         int                      rc;
5206
5207         down_write(&com->lc_sem);
5208         if (init) {
5209                 memset(lo, 0, com->lc_file_size);
5210         } else {
5211                 __u32 count = lo->ll_success_count;
5212                 time64_t last_time = lo->ll_time_last_complete;
5213
5214                 memset(lo, 0, com->lc_file_size);
5215                 lo->ll_success_count = count;
5216                 lo->ll_time_last_complete = last_time;
5217         }
5218
5219         lo->ll_magic = LFSCK_LAYOUT_MAGIC;
5220         lo->ll_status = LS_INIT;
5221
5222         if (com->lc_lfsck->li_master) {
5223                 struct lfsck_assistant_data *lad = com->lc_data;
5224
5225                 clear_bit(LAD_INCOMPLETE, &lad->lad_flags);
5226                 CFS_RESET_BITMAP(lad->lad_bitmap);
5227         }
5228
5229         rc = lfsck_layout_store(env, com);
5230         if (rc == 0 && com->lc_lfsck->li_master)
5231                 rc = lfsck_load_sub_trace_files(env, com,
5232                         &dt_lfsck_layout_dangling_features, LFSCK_LAYOUT, true);
5233         up_write(&com->lc_sem);
5234
5235         CDEBUG(D_LFSCK, "%s: layout LFSCK reset: rc = %d\n",
5236                lfsck_lfsck2name(com->lc_lfsck), rc);
5237
5238         return rc;
5239 }
5240
5241 static void lfsck_layout_fail(const struct lu_env *env,
5242                               struct lfsck_component *com, bool new_checked)
5243 {
5244         struct lfsck_layout *lo = com->lc_file_ram;
5245
5246         down_write(&com->lc_sem);
5247         if (new_checked)
5248                 com->lc_new_checked++;
5249         lfsck_layout_record_failure(env, com->lc_lfsck, lo);
5250         up_write(&com->lc_sem);
5251 }
5252
5253 static int lfsck_layout_master_checkpoint(const struct lu_env *env,
5254                                           struct lfsck_component *com, bool init)
5255 {
5256         struct lfsck_instance   *lfsck   = com->lc_lfsck;
5257         struct lfsck_layout     *lo      = com->lc_file_ram;
5258         int                      rc;
5259
5260         if (!init) {
5261                 rc = lfsck_checkpoint_generic(env, com);
5262                 if (rc != 0)
5263                         return rc > 0 ? 0 : rc;
5264         }
5265
5266         down_write(&com->lc_sem);
5267         if (init) {
5268                 lo->ll_pos_latest_start =
5269                                 lfsck->li_pos_checkpoint.lp_oit_cookie;
5270         } else {
5271                 lo->ll_pos_last_checkpoint =
5272                                 lfsck->li_pos_checkpoint.lp_oit_cookie;
5273                 lo->ll_run_time_phase1 += ktime_get_seconds() -
5274                                           lfsck->li_time_last_checkpoint;
5275                 lo->ll_time_last_checkpoint = ktime_get_real_seconds();
5276                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
5277                 com->lc_new_checked = 0;
5278         }
5279
5280         rc = lfsck_layout_store(env, com);
5281         up_write(&com->lc_sem);
5282
5283         CDEBUG(D_LFSCK, "%s: layout LFSCK master checkpoint at the pos ["
5284                "%llu], status = %d: rc = %d\n", lfsck_lfsck2name(lfsck),
5285                lfsck->li_pos_current.lp_oit_cookie, lo->ll_status, rc);
5286
5287         return rc;
5288 }
5289
5290 static int lfsck_layout_slave_checkpoint(const struct lu_env *env,
5291                                          struct lfsck_component *com, bool init)
5292 {
5293         struct lfsck_instance   *lfsck = com->lc_lfsck;
5294         struct lfsck_layout     *lo    = com->lc_file_ram;
5295         int                      rc;
5296
5297         if (com->lc_new_checked == 0 && !init)
5298                 return 0;
5299
5300         down_write(&com->lc_sem);
5301         if (init) {
5302                 lo->ll_pos_latest_start =
5303                                 lfsck->li_pos_checkpoint.lp_oit_cookie;
5304         } else {
5305                 lo->ll_pos_last_checkpoint =
5306                                 lfsck->li_pos_checkpoint.lp_oit_cookie;
5307                 lo->ll_run_time_phase1 += ktime_get_seconds() -
5308                                           lfsck->li_time_last_checkpoint;
5309                 lo->ll_time_last_checkpoint = ktime_get_real_seconds();
5310                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
5311                 com->lc_new_checked = 0;
5312         }
5313
5314         rc = lfsck_layout_store(env, com);
5315         up_write(&com->lc_sem);
5316
5317         CDEBUG(D_LFSCK, "%s: layout LFSCK slave checkpoint at the pos ["
5318                "%llu], status = %d: rc = %d\n", lfsck_lfsck2name(lfsck),
5319                lfsck->li_pos_current.lp_oit_cookie, lo->ll_status, rc);
5320
5321         return rc;
5322 }
5323
5324 static int lfsck_layout_prep(const struct lu_env *env,
5325                              struct lfsck_component *com,
5326                              struct lfsck_start *start)
5327 {
5328         struct lfsck_instance   *lfsck  = com->lc_lfsck;
5329         struct lfsck_layout     *lo     = com->lc_file_ram;
5330         struct lfsck_position   *pos    = &com->lc_pos_start;
5331
5332         fid_zero(&pos->lp_dir_parent);
5333         pos->lp_dir_cookie = 0;
5334         if (lo->ll_status == LS_COMPLETED ||
5335             lo->ll_status == LS_PARTIAL ||
5336             /* To handle orphan, must scan from the beginning. */
5337             (start != NULL && start->ls_flags & LPF_OST_ORPHAN)) {
5338                 int rc;
5339
5340                 rc = lfsck_layout_reset(env, com, false);
5341                 if (rc == 0)
5342                         rc = lfsck_set_param(env, lfsck, start, true);
5343
5344                 if (rc != 0) {
5345                         CDEBUG(D_LFSCK, "%s: layout LFSCK prep failed: "
5346                                "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
5347
5348                         return rc;
5349                 }
5350         }
5351
5352         down_write(&com->lc_sem);
5353         lo->ll_time_latest_start = ktime_get_real_seconds();
5354         spin_lock(&lfsck->li_lock);
5355         if (lo->ll_flags & LF_SCANNED_ONCE) {
5356                 if (!lfsck->li_drop_dryrun ||
5357                     lo->ll_pos_first_inconsistent == 0) {
5358                         lo->ll_status = LS_SCANNING_PHASE2;
5359                         list_move_tail(&com->lc_link,
5360                                        &lfsck->li_list_double_scan);
5361                         pos->lp_oit_cookie = 0;
5362                 } else {
5363                         int i;
5364
5365                         lo->ll_status = LS_SCANNING_PHASE1;
5366                         lo->ll_run_time_phase1 = 0;
5367                         lo->ll_run_time_phase2 = 0;
5368                         lo->ll_objs_checked_phase1 = 0;
5369                         lo->ll_objs_checked_phase2 = 0;
5370                         lo->ll_objs_failed_phase1 = 0;
5371                         lo->ll_objs_failed_phase2 = 0;
5372                         for (i = 0; i < LLIT_MAX; i++)
5373                                 lo->ll_objs_repaired[i] = 0;
5374
5375                         pos->lp_oit_cookie = lo->ll_pos_first_inconsistent;
5376                         fid_zero(&com->lc_fid_latest_scanned_phase2);
5377                 }
5378         } else {
5379                 lo->ll_status = LS_SCANNING_PHASE1;
5380                 if (!lfsck->li_drop_dryrun ||
5381                     lo->ll_pos_first_inconsistent == 0)
5382                         pos->lp_oit_cookie = lo->ll_pos_last_checkpoint + 1;
5383                 else
5384                         pos->lp_oit_cookie = lo->ll_pos_first_inconsistent;
5385         }
5386         spin_unlock(&lfsck->li_lock);
5387         up_write(&com->lc_sem);
5388
5389         return 0;
5390 }
5391
5392 static int lfsck_layout_slave_prep(const struct lu_env *env,
5393                                    struct lfsck_component *com,
5394                                    struct lfsck_start_param *lsp)
5395 {
5396         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
5397         struct lfsck_instance           *lfsck  = com->lc_lfsck;
5398         struct lfsck_layout             *lo     = com->lc_file_ram;
5399         struct lfsck_start              *start  = lsp->lsp_start;
5400         int                              rc;
5401
5402         rc = lfsck_layout_prep(env, com, start);
5403         if (rc != 0)
5404                 return rc;
5405
5406         if (lo->ll_flags & LF_CRASHED_LASTID &&
5407             list_empty(&llsd->llsd_master_list)) {
5408                 LASSERT(lfsck->li_out_notify != NULL);
5409
5410                 lfsck->li_out_notify(env, lfsck->li_out_notify_data,
5411                                      LE_LASTID_REBUILDING);
5412         }
5413
5414         if (!lsp->lsp_index_valid)
5415                 return 0;
5416
5417         rc = lfsck_layout_llst_add(llsd, lsp->lsp_index);
5418         if (rc == 0 && start != NULL && start->ls_flags & LPF_OST_ORPHAN) {
5419                 LASSERT(!llsd->llsd_rbtree_valid);
5420
5421                 down_write(&llsd->llsd_rb_rwsem);
5422                 rc = lfsck_rbtree_setup(env, com);
5423                 up_write(&llsd->llsd_rb_rwsem);
5424         }
5425
5426         CDEBUG(D_LFSCK, "%s: layout LFSCK slave prep done, start pos ["
5427                "%llu]\n", lfsck_lfsck2name(lfsck),
5428                com->lc_pos_start.lp_oit_cookie);
5429
5430         return rc;
5431 }
5432
5433 static int lfsck_layout_master_prep(const struct lu_env *env,
5434                                     struct lfsck_component *com,
5435                                     struct lfsck_start_param *lsp)
5436 {
5437         int rc;
5438         ENTRY;
5439
5440         rc = lfsck_layout_load_bitmap(env, com);
5441         if (rc != 0) {
5442                 rc = lfsck_layout_reset(env, com, false);
5443                 if (rc == 0)
5444                         rc = lfsck_set_param(env, com->lc_lfsck,
5445                                              lsp->lsp_start, true);
5446
5447                 if (rc != 0)
5448                         GOTO(log, rc);
5449         }
5450
5451         rc = lfsck_layout_prep(env, com, lsp->lsp_start);
5452         if (rc != 0)
5453                 RETURN(rc);
5454
5455         rc = lfsck_start_assistant(env, com, lsp);
5456
5457         GOTO(log, rc);
5458
5459 log:
5460         CDEBUG(D_LFSCK, "%s: layout LFSCK master prep done, start pos ["
5461                "%llu]\n", lfsck_lfsck2name(com->lc_lfsck),
5462                com->lc_pos_start.lp_oit_cookie);
5463
5464         return 0;
5465 }
5466
5467 /* Pre-fetch the attribute for each stripe in the given layout EA. */
5468 static int lfsck_layout_scan_stripes(const struct lu_env *env,
5469                                      struct lfsck_component *com,
5470                                      struct dt_object *parent,
5471                                      struct lov_mds_md_v1 *lmm, __u32 comp_id)
5472 {
5473         struct lfsck_thread_info        *info    = lfsck_env_info(env);
5474         struct lfsck_instance           *lfsck   = com->lc_lfsck;
5475         struct lfsck_bookmark           *bk      = &lfsck->li_bookmark_ram;
5476         struct lfsck_layout             *lo      = com->lc_file_ram;
5477         struct lfsck_assistant_data     *lad     = com->lc_data;
5478         struct lfsck_assistant_object   *lso     = NULL;
5479         struct lov_ost_data_v1          *objs;
5480         struct lfsck_tgt_descs          *ltds    = &lfsck->li_ost_descs;
5481         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
5482         struct ptlrpc_thread            *athread = &lad->lad_thread;
5483         struct lu_buf                    buf;
5484         int                              rc      = 0;
5485         int                              i;
5486         __u32                            magic;
5487         __u16                            count;
5488         ENTRY;
5489
5490         lfsck_buf_init(&buf, &info->lti_ff, sizeof(struct filter_fid));
5491         magic = le32_to_cpu(lmm->lmm_magic);
5492         if (magic == LOV_MAGIC_V1) {
5493                 objs = &lmm->lmm_objects[0];
5494         } else {
5495                 LASSERT(magic == LOV_MAGIC_V3);
5496                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
5497         }
5498
5499         count = le16_to_cpu(lmm->lmm_stripe_count);
5500         for (i = 0; i < count; i++, objs++) {
5501                 struct lu_fid           *fid    = &info->lti_fid;
5502                 struct ost_id           *oi     = &info->lti_oi;
5503                 struct lfsck_layout_req *llr;
5504                 struct lfsck_tgt_desc   *tgt    = NULL;
5505                 struct dt_object        *cobj   = NULL;
5506                 __u32                    index;
5507                 bool                     wakeup = false;
5508
5509                 if (unlikely(lovea_slot_is_dummy(objs)))
5510                         continue;
5511
5512                 wait_event_idle(mthread->t_ctl_waitq,
5513                                 lad->lad_prefetched < bk->lb_async_windows ||
5514                                 !thread_is_running(mthread) ||
5515                                 thread_is_stopped(athread));
5516
5517                 if (unlikely(!thread_is_running(mthread)) ||
5518                              thread_is_stopped(athread))
5519                         GOTO(out, rc = 0);
5520
5521                 if (unlikely(lfsck_is_dead_obj(parent)))
5522                         GOTO(out, rc = 0);
5523
5524                 ostid_le_to_cpu(&objs->l_ost_oi, oi);
5525                 index = le32_to_cpu(objs->l_ost_idx);
5526                 rc = ostid_to_fid(fid, oi, index);
5527                 if (rc != 0) {
5528                         CDEBUG(D_LFSCK, "%s: get invalid layout EA for "DFID
5529                                ": "DOSTID", idx %u, comp_id %u\n",
5530                                lfsck_lfsck2name(lfsck),
5531                                PFID(lfsck_dto2fid(parent)), POSTID(oi),
5532                                index, comp_id);
5533                         goto next;
5534                 }
5535
5536                 tgt = lfsck_tgt_get(ltds, index);
5537                 if (unlikely(tgt == NULL)) {
5538                         CDEBUG(D_LFSCK, "%s: cannot talk with OST %x which "
5539                                "did not join the layout LFSCK, comp_id %u\n",
5540                                lfsck_lfsck2name(lfsck), index, comp_id);
5541                         lfsck_lad_set_bitmap(env, com, index);
5542                         goto next;
5543                 }
5544
5545                 /* There is potential deadlock race condition between object
5546                  * destroy and layout LFSCK. Consider the following scenario:
5547                  *
5548                  * 1) The LFSCK thread obtained the parent object firstly, at
5549                  *    that time, the parent object has not been destroyed yet.
5550                  *
5551                  * 2) One RPC service thread destroyed the parent and all its
5552                  *    children objects. Because the LFSCK is referencing the
5553                  *    parent object, then the parent object will be marked as
5554                  *    dying in RAM. On the other hand, the parent object is
5555                  *    referencing all its children objects, then all children
5556                  *    objects will be marked as dying in RAM also.
5557                  *
5558                  * 3) The LFSCK thread tries to find some child object with
5559                  *    the parent object referenced. Then it will find that the
5560                  *    child object is dying. According to the object visibility
5561                  *    rules: the object with dying flag cannot be returned to
5562                  *    others. So the LFSCK thread has to wait until the dying
5563                  *    object has been purged from RAM, then it can allocate a
5564                  *    new object (with the same FID) in RAM. Unfortunately, the
5565                  *    LFSCK thread itself is referencing the parent object, and
5566                  *    cause the parent object cannot be purged, then cause the
5567                  *    child object cannot be purged also. So the LFSCK thread
5568                  *    will fall into deadlock.
5569                  */
5570                 cobj = lfsck_object_find_by_dev(env, tgt->ltd_tgt, fid);
5571                 if (IS_ERR(cobj)) {
5572                         if (lfsck_is_dead_obj(parent)) {
5573                                 lfsck_tgt_put(tgt);
5574
5575                                 GOTO(out, rc = 0);
5576                         }
5577
5578                         rc = PTR_ERR(cobj);
5579                         goto next;
5580                 }
5581
5582                 rc = dt_declare_attr_get(env, cobj);
5583                 if (rc)
5584                         goto next;
5585
5586                 rc = dt_declare_xattr_get(env, cobj, &buf, XATTR_NAME_FID);
5587                 if (rc)
5588                         goto next;
5589
5590                 if (lso == NULL) {
5591                         struct lu_attr *attr = &info->lti_la;
5592
5593                         rc = dt_attr_get(env, parent, attr);
5594                         if (rc != 0)
5595                                 goto next;
5596
5597                         lso = lfsck_assistant_object_init(env,
5598                                 lfsck_dto2fid(parent), attr,
5599                                 lfsck->li_pos_current.lp_oit_cookie, false);
5600                         if (IS_ERR(lso)) {
5601                                 rc = PTR_ERR(lso);
5602                                 lso = NULL;
5603
5604                                 goto next;
5605                         }
5606                 }
5607
5608                 llr = lfsck_layout_assistant_req_init(lso, cobj, comp_id,
5609                                                       index, i);
5610                 if (IS_ERR(llr)) {
5611                         rc = PTR_ERR(llr);
5612                         goto next;
5613                 }
5614
5615                 cobj = NULL;
5616                 spin_lock(&lad->lad_lock);
5617                 if (lad->lad_assistant_status < 0) {
5618                         spin_unlock(&lad->lad_lock);
5619                         lfsck_layout_assistant_req_fini(env, &llr->llr_lar);
5620                         lfsck_tgt_put(tgt);
5621                         RETURN(lad->lad_assistant_status);
5622                 }
5623
5624                 list_add_tail(&llr->llr_lar.lar_list, &lad->lad_req_list);
5625                 if (lad->lad_prefetched == 0)
5626                         wakeup = true;
5627
5628                 lad->lad_prefetched++;
5629                 spin_unlock(&lad->lad_lock);
5630                 if (wakeup)
5631                         wake_up(&athread->t_ctl_waitq);
5632
5633 next:
5634                 down_write(&com->lc_sem);
5635                 com->lc_new_checked++;
5636                 if (rc < 0)
5637                         lfsck_layout_record_failure(env, lfsck, lo);
5638                 up_write(&com->lc_sem);
5639
5640                 if (cobj != NULL && !IS_ERR(cobj))
5641                         lfsck_object_put(env, cobj);
5642
5643                 if (likely(tgt != NULL))
5644                         lfsck_tgt_put(tgt);
5645
5646                 if (rc < 0 && bk->lb_param & LPF_FAILOUT)
5647                         GOTO(out, rc);
5648         }
5649
5650         GOTO(out, rc = 0);
5651
5652 out:
5653         if (lso != NULL)
5654                 lfsck_assistant_object_put(env, lso);
5655
5656         return rc;
5657 }
5658
5659 /* For the given object, read its layout EA locally. For each stripe, pre-fetch
5660  * the OST-object's attribute and generate an structure lfsck_layout_req on the
5661  * list ::lad_req_list.
5662  *
5663  * For each request on above list, the lfsck_layout_assistant thread compares
5664  * the OST side attribute with local attribute, if inconsistent, then repair it.
5665  *
5666  * All above processing is async mode with pipeline. */
5667 static int lfsck_layout_master_exec_oit(const struct lu_env *env,
5668                                         struct lfsck_component *com,
5669                                         struct dt_object *obj)
5670 {
5671         struct lfsck_thread_info        *info   = lfsck_env_info(env);
5672         struct ost_id                   *oi     = &info->lti_oi;
5673         struct lfsck_layout             *lo     = com->lc_file_ram;
5674         struct lfsck_assistant_data     *lad    = com->lc_data;
5675         struct lfsck_instance           *lfsck  = com->lc_lfsck;
5676         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
5677         struct thandle                  *handle = NULL;
5678         struct lu_buf                   *buf    = &info->lti_big_buf;
5679         struct lov_mds_md_v1            *lmm    = NULL;
5680         struct dt_device                *dev    = lfsck_obj2dev(obj);
5681         struct lustre_handle             lh     = { 0 };
5682         struct lu_buf                    ea_buf = { NULL };
5683         struct lov_comp_md_v1           *lcm    = NULL;
5684         struct lov_comp_md_entry_v1     *lcme   = NULL;
5685         int                              rc     = 0;
5686         int                              size   = 0;
5687         __u32                            magic  = 0;
5688         __u16                            count  = 0;
5689         bool                             locked = false;
5690         bool                             stripe = false;
5691         bool                             bad_oi = false;
5692         ENTRY;
5693
5694         if (!S_ISREG(lfsck_object_type(obj)))
5695                 GOTO(out, rc = 0);
5696
5697         if (lad->lad_assistant_status < 0)
5698                 GOTO(out, rc = -ESRCH);
5699
5700         fid_to_lmm_oi(lfsck_dto2fid(obj), oi);
5701         lmm_oi_cpu_to_le(oi, oi);
5702         dt_read_lock(env, obj, 0);
5703         locked = true;
5704
5705 again:
5706         bad_oi = false;
5707         if (dt_object_exists(obj) == 0 ||
5708             lfsck_is_dead_obj(obj))
5709                 GOTO(out, rc = 0);
5710
5711         rc = lfsck_layout_get_lovea(env, obj, buf);
5712         if (rc == -EINVAL || rc == -ENODATA || rc == -EOPNOTSUPP)
5713                 /* Skip bad lov EA during the 1st cycle scanning, and
5714                  * try to recover it via orphan in the 2nd scanning. */
5715                 rc = 0;
5716         if (rc <= 0)
5717                 GOTO(out, rc);
5718
5719         size = rc;
5720         lmm = buf->lb_buf;
5721         magic = le32_to_cpu(lmm->lmm_magic);
5722         if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
5723                 struct lov_mds_md_v1 *v1;
5724                 int i;
5725
5726                 lcm = buf->lb_buf;
5727                 count = le16_to_cpu(lcm->lcm_entry_count);
5728                 for (i = 0; i < count; i++) {
5729                         lcme = &lcm->lcm_entries[i];
5730                         v1 = buf->lb_buf + le32_to_cpu(lcme->lcme_offset);
5731                         if (memcmp(oi, &v1->lmm_oi, sizeof(*oi)) != 0)
5732                                 goto fix;
5733                 }
5734
5735                 GOTO(out, stripe = true);
5736         } else if (memcmp(oi, &lmm->lmm_oi, sizeof(*oi)) == 0) {
5737                 GOTO(out, stripe = true);
5738         }
5739
5740 fix:
5741         /* Inconsistent lmm_oi, should be repaired. */
5742         bad_oi = true;
5743
5744         if (bk->lb_param & LPF_DRYRUN) {
5745                 lo->ll_objs_repaired[LLIT_OTHERS - 1]++;
5746
5747                 GOTO(out, stripe = true);
5748         }
5749
5750         if (!lustre_handle_is_used(&lh)) {
5751                 dt_read_unlock(env, obj);
5752                 locked = false;
5753                 rc = lfsck_ibits_lock(env, lfsck, obj, &lh,
5754                                       MDS_INODELOCK_LAYOUT |
5755                                       MDS_INODELOCK_XATTR, LCK_EX);
5756                 if (rc != 0)
5757                         GOTO(out, rc);
5758
5759                 handle = lfsck_trans_create(env, dev, lfsck);
5760                 if (IS_ERR(handle))
5761                         GOTO(out, rc = PTR_ERR(handle));
5762
5763                 lfsck_buf_init(&ea_buf, buf->lb_buf, size);
5764                 rc = dt_declare_xattr_set(env, obj, &ea_buf, XATTR_NAME_LOV,
5765                                           LU_XATTR_REPLACE, handle);
5766                 if (rc != 0)
5767                         GOTO(out, rc);
5768
5769                 rc = dt_trans_start_local(env, dev, handle);
5770                 if (rc != 0)
5771                         GOTO(out, rc);
5772
5773                 dt_write_lock(env, obj, 0);
5774                 locked = true;
5775
5776                 goto again;
5777         }
5778
5779         if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
5780                 struct lov_mds_md_v1 *v1;
5781                 int i;
5782
5783                 for (i = 0; i < count; i++) {
5784                         lcme = &lcm->lcm_entries[i];
5785                         v1 = buf->lb_buf + le32_to_cpu(lcme->lcme_offset);
5786                         v1->lmm_oi = *oi;
5787                 }
5788         } else {
5789                 lmm->lmm_oi = *oi;
5790         }
5791
5792         rc = dt_xattr_set(env, obj, &ea_buf, XATTR_NAME_LOV,
5793                           LU_XATTR_REPLACE, handle);
5794         if (rc != 0)
5795                 GOTO(out, rc);
5796
5797         lo->ll_objs_repaired[LLIT_OTHERS - 1]++;
5798
5799         GOTO(out, stripe = true);
5800
5801 out:
5802         if (locked) {
5803                 if (lustre_handle_is_used(&lh))
5804                         dt_write_unlock(env, obj);
5805                 else
5806                         dt_read_unlock(env, obj);
5807         }
5808
5809         if (handle != NULL && !IS_ERR(handle))
5810                 dt_trans_stop(env, dev, handle);
5811
5812         lfsck_ibits_unlock(&lh, LCK_EX);
5813
5814         if (bad_oi)
5815                 CDEBUG(D_LFSCK, "%s: layout LFSCK master %s bad lmm_oi for "
5816                        DFID": rc = %d\n", lfsck_lfsck2name(lfsck),
5817                        bk->lb_param & LPF_DRYRUN ? "found" : "repaired",
5818                        PFID(lfsck_dto2fid(obj)), rc);
5819
5820         if (stripe) {
5821                 if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
5822                         int i;
5823
5824                         for (i = 0; i < count; i++) {
5825                                 lcme = &lcm->lcm_entries[i];
5826                                 if (!(le32_to_cpu(lcme->lcme_flags) &
5827                                       LCME_FL_INIT))
5828                                         continue;
5829
5830                                 rc = lfsck_layout_scan_stripes(env, com, obj,
5831                                         (struct lov_mds_md_v1 *)(buf->lb_buf +
5832                                         le32_to_cpu(lcme->lcme_offset)),
5833                                         le32_to_cpu(lcme->lcme_id));
5834                         }
5835                 } else {
5836                         rc = lfsck_layout_scan_stripes(env, com, obj, lmm, 0);
5837                 }
5838         } else {
5839                 down_write(&com->lc_sem);
5840                 com->lc_new_checked++;
5841                 if (rc < 0)
5842                         lfsck_layout_record_failure(env, lfsck, lo);
5843                 up_write(&com->lc_sem);
5844         }
5845
5846         return rc;
5847 }
5848
5849 static int lfsck_layout_slave_exec_oit(const struct lu_env *env,
5850                                        struct lfsck_component *com,
5851                                        struct dt_object *obj)
5852 {
5853         struct lfsck_instance           *lfsck  = com->lc_lfsck;
5854         struct lfsck_layout             *lo     = com->lc_file_ram;
5855         const struct lu_fid             *fid    = lfsck_dto2fid(obj);
5856         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
5857         struct lfsck_layout_seq         *lls;
5858         __u64                            seq;
5859         __u64                            oid;
5860         int                              rc;
5861         ENTRY;
5862
5863         LASSERT(llsd != NULL);
5864
5865         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY5) &&
5866             cfs_fail_val == lfsck_dev_idx(lfsck)) {
5867                 struct ptlrpc_thread    *thread = &lfsck->li_thread;
5868
5869                 wait_event_idle_timeout(thread->t_ctl_waitq,
5870                                         !thread_is_running(thread),
5871                                         cfs_time_seconds(1));
5872         }
5873
5874         lfsck_rbtree_update_bitmap(env, com, fid, false);
5875
5876         down_write(&com->lc_sem);
5877         if (fid_is_idif(fid))
5878                 seq = 0;
5879         else if (!fid_is_norm(fid) ||
5880                  !fid_is_for_ostobj(env, lfsck, obj, fid))
5881                 GOTO(unlock, rc = 0);
5882         else
5883                 seq = fid_seq(fid);
5884         com->lc_new_checked++;
5885
5886         lls = lfsck_layout_seq_lookup(llsd, seq);
5887         if (lls == NULL) {
5888                 OBD_ALLOC_PTR(lls);
5889                 if (unlikely(lls == NULL))
5890                         GOTO(unlock, rc = -ENOMEM);
5891
5892                 INIT_LIST_HEAD(&lls->lls_list);
5893                 lls->lls_seq = seq;
5894                 rc = lfsck_layout_lastid_load(env, com, lls);
5895                 if (rc != 0) {
5896                         CDEBUG(D_LFSCK, "%s: layout LFSCK failed to "
5897                               "load LAST_ID for %#llx: rc = %d\n",
5898                               lfsck_lfsck2name(com->lc_lfsck), seq, rc);
5899                         lo->ll_objs_failed_phase1++;
5900                         OBD_FREE_PTR(lls);
5901                         GOTO(unlock, rc);
5902                 }
5903
5904                 lfsck_layout_seq_insert(llsd, lls);
5905         }
5906
5907         if (unlikely(fid_is_last_id(fid)))
5908                 GOTO(unlock, rc = 0);
5909
5910         if (fid_is_idif(fid))
5911                 oid = fid_idif_id(fid_seq(fid), fid_oid(fid), fid_ver(fid));
5912         else
5913                 oid = fid_oid(fid);
5914
5915         if (oid > lls->lls_lastid_known)
5916                 lls->lls_lastid_known = oid;
5917
5918         if (oid > lls->lls_lastid) {
5919                 if (!(lo->ll_flags & LF_CRASHED_LASTID)) {
5920                         /* OFD may create new objects during LFSCK scanning. */
5921                         rc = lfsck_layout_lastid_reload(env, com, lls);
5922                         if (unlikely(rc != 0)) {
5923                                 CDEBUG(D_LFSCK, "%s: layout LFSCK failed to "
5924                                       "reload LAST_ID for %#llx: rc = %d\n",
5925                                       lfsck_lfsck2name(com->lc_lfsck),
5926                                       lls->lls_seq, rc);
5927
5928                                 GOTO(unlock, rc);
5929                         }
5930
5931                         if (oid <= lls->lls_lastid ||
5932                             lo->ll_flags & LF_CRASHED_LASTID)
5933                                 GOTO(unlock, rc = 0);
5934
5935                         LASSERT(lfsck->li_out_notify != NULL);
5936
5937                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
5938                                              LE_LASTID_REBUILDING);
5939                         lo->ll_flags |= LF_CRASHED_LASTID;
5940
5941                         CDEBUG(D_LFSCK, "%s: layout LFSCK finds crashed "
5942                                "LAST_ID file (2) for the sequence %#llx"
5943                                ", old value %llu, known value %llu\n",
5944                                lfsck_lfsck2name(lfsck), lls->lls_seq,
5945                                lls->lls_lastid, oid);
5946                 }
5947
5948                 lls->lls_lastid = oid;
5949                 lls->lls_dirty = 1;
5950         }
5951
5952         GOTO(unlock, rc = 0);
5953
5954 unlock:
5955         up_write(&com->lc_sem);
5956
5957         return rc;
5958 }
5959
5960 static int lfsck_layout_exec_dir(const struct lu_env *env,
5961                                  struct lfsck_component *com,
5962                                  struct lfsck_assistant_object *lso,
5963                                  struct lu_dirent *ent, __u16 type)
5964 {
5965         return 0;
5966 }
5967
5968 static int lfsck_layout_master_post(const struct lu_env *env,
5969                                     struct lfsck_component *com,
5970                                     int result, bool init)
5971 {
5972         struct lfsck_instance   *lfsck  = com->lc_lfsck;
5973         struct lfsck_layout     *lo     = com->lc_file_ram;
5974         int                      rc;
5975         ENTRY;
5976
5977         lfsck_post_generic(env, com, &result);
5978
5979         down_write(&com->lc_sem);
5980         spin_lock(&lfsck->li_lock);
5981         if (!init)
5982                 lo->ll_pos_last_checkpoint =
5983                                 lfsck->li_pos_checkpoint.lp_oit_cookie;
5984
5985         if (result > 0) {
5986                 if (lo->ll_flags & LF_INCOMPLETE)
5987                         lo->ll_status = LS_PARTIAL;
5988                 else
5989                         lo->ll_status = LS_SCANNING_PHASE2;
5990                 lo->ll_flags |= LF_SCANNED_ONCE;
5991                 lo->ll_flags &= ~LF_UPGRADE;
5992                 list_move_tail(&com->lc_link, &lfsck->li_list_double_scan);
5993         } else if (result == 0) {
5994                 if (lfsck->li_status != 0)
5995                         lo->ll_status = lfsck->li_status;
5996                 else
5997                         lo->ll_status = LS_STOPPED;
5998                 if (lo->ll_status != LS_PAUSED)
5999                         list_move_tail(&com->lc_link, &lfsck->li_list_idle);
6000         } else {
6001                 lo->ll_status = LS_FAILED;
6002                 list_move_tail(&com->lc_link, &lfsck->li_list_idle);
6003         }
6004         spin_unlock(&lfsck->li_lock);
6005
6006         if (!init) {
6007                 lo->ll_run_time_phase1 += ktime_get_seconds() -
6008                                           lfsck->li_time_last_checkpoint;
6009                 lo->ll_time_last_checkpoint = ktime_get_real_seconds();
6010                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
6011                 com->lc_new_checked = 0;
6012         }
6013
6014         rc = lfsck_layout_store(env, com);
6015         up_write(&com->lc_sem);
6016
6017         CDEBUG(D_LFSCK, "%s: layout LFSCK master post done: rc = %d\n",
6018                lfsck_lfsck2name(lfsck), rc);
6019
6020         RETURN(rc);
6021 }
6022
6023 static int lfsck_layout_slave_post(const struct lu_env *env,
6024                                    struct lfsck_component *com,
6025                                    int result, bool init)
6026 {
6027         struct lfsck_instance   *lfsck = com->lc_lfsck;
6028         struct lfsck_layout     *lo    = com->lc_file_ram;
6029         int                      rc;
6030         bool                     done  = false;
6031
6032         down_write(&com->lc_sem);
6033         rc = lfsck_layout_lastid_store(env, com);
6034         if (rc != 0)
6035                 result = rc;
6036
6037         LASSERT(lfsck->li_out_notify != NULL);
6038
6039         spin_lock(&lfsck->li_lock);
6040         if (!init)
6041                 lo->ll_pos_last_checkpoint =
6042                                 lfsck->li_pos_checkpoint.lp_oit_cookie;
6043
6044         if (result > 0) {
6045                 lo->ll_status = LS_SCANNING_PHASE2;
6046                 lo->ll_flags |= LF_SCANNED_ONCE;
6047                 if (lo->ll_flags & LF_CRASHED_LASTID) {
6048                         done = true;
6049                         lo->ll_flags &= ~LF_CRASHED_LASTID;
6050
6051                         CDEBUG(D_LFSCK, "%s: layout LFSCK has rebuilt "
6052                                "crashed LAST_ID files successfully\n",
6053                                lfsck_lfsck2name(lfsck));
6054                 }
6055                 lo->ll_flags &= ~LF_UPGRADE;
6056                 list_move_tail(&com->lc_link, &lfsck->li_list_double_scan);
6057         } else if (result == 0) {
6058                 if (lfsck->li_status != 0)
6059                         lo->ll_status = lfsck->li_status;
6060                 else
6061                         lo->ll_status = LS_STOPPED;
6062                 if (lo->ll_status != LS_PAUSED)
6063                         list_move_tail(&com->lc_link, &lfsck->li_list_idle);
6064         } else {
6065                 lo->ll_status = LS_FAILED;
6066                 list_move_tail(&com->lc_link, &lfsck->li_list_idle);
6067         }
6068         spin_unlock(&lfsck->li_lock);
6069
6070         if (done)
6071                 lfsck->li_out_notify(env, lfsck->li_out_notify_data,
6072                                      LE_LASTID_REBUILT);
6073
6074         if (!init) {
6075                 lo->ll_run_time_phase1 += ktime_get_seconds() -
6076                                           lfsck->li_time_last_checkpoint;
6077                 lo->ll_time_last_checkpoint = ktime_get_real_seconds();
6078                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
6079                 com->lc_new_checked = 0;
6080         }
6081
6082         rc = lfsck_layout_store(env, com);
6083         up_write(&com->lc_sem);
6084
6085         lfsck_layout_slave_notify_master(env, com, LE_PHASE1_DONE, result);
6086
6087         CDEBUG(D_LFSCK, "%s: layout LFSCK slave post done: rc = %d\n",
6088                lfsck_lfsck2name(lfsck), rc);
6089
6090         return rc;
6091 }
6092
6093 static void lfsck_layout_dump(const struct lu_env *env,
6094                               struct lfsck_component *com, struct seq_file *m)
6095 {
6096         struct lfsck_instance   *lfsck = com->lc_lfsck;
6097         struct lfsck_bookmark   *bk    = &lfsck->li_bookmark_ram;
6098         struct lfsck_layout     *lo    = com->lc_file_ram;
6099         const char *prefix;
6100
6101         down_read(&com->lc_sem);
6102         if (bk->lb_param & LPF_DRYRUN)
6103                 prefix = "inconsistent";
6104         else
6105                 prefix = "repaired";
6106
6107         seq_printf(m, "name: lfsck_layout\n"
6108                    "magic: %#x\n"
6109                    "version: %d\n"
6110                    "status: %s\n",
6111                    lo->ll_magic,
6112                    bk->lb_version,
6113                    lfsck_status2name(lo->ll_status));
6114
6115         lfsck_bits_dump(m, lo->ll_flags, lfsck_flags_names, "flags");
6116
6117         lfsck_bits_dump(m, bk->lb_param, lfsck_param_names, "param");
6118
6119         lfsck_time_dump(m, lo->ll_time_last_complete, "last_completed");
6120
6121         lfsck_time_dump(m, lo->ll_time_latest_start, "latest_start");
6122
6123         lfsck_time_dump(m, lo->ll_time_last_checkpoint, "last_checkpoint");
6124
6125         seq_printf(m, "latest_start_position: %llu\n"
6126                    "last_checkpoint_position: %llu\n"
6127                    "first_failure_position: %llu\n",
6128                    lo->ll_pos_latest_start,
6129                    lo->ll_pos_last_checkpoint,
6130                    lo->ll_pos_first_inconsistent);
6131
6132         seq_printf(m, "success_count: %u\n"
6133                    "%s_dangling: %llu\n"
6134                    "%s_unmatched_pair: %llu\n"
6135                    "%s_multiple_referenced: %llu\n"
6136                    "%s_orphan: %llu\n"
6137                    "%s_inconsistent_owner: %llu\n"
6138                    "%s_others: %llu\n"
6139                    "skipped: %llu\n"
6140                    "failed_phase1: %llu\n"
6141                    "failed_phase2: %llu\n",
6142                    lo->ll_success_count,
6143                    prefix, lo->ll_objs_repaired[LLIT_DANGLING - 1],
6144                    prefix, lo->ll_objs_repaired[LLIT_UNMATCHED_PAIR - 1],
6145                    prefix, lo->ll_objs_repaired[LLIT_MULTIPLE_REFERENCED - 1],
6146                    prefix, lo->ll_objs_repaired[LLIT_ORPHAN - 1],
6147                    prefix, lo->ll_objs_repaired[LLIT_INCONSISTENT_OWNER - 1],
6148                    prefix, lo->ll_objs_repaired[LLIT_OTHERS - 1],
6149                    lo->ll_objs_skipped,
6150                    lo->ll_objs_failed_phase1,
6151                    lo->ll_objs_failed_phase2);
6152
6153         if (lo->ll_status == LS_SCANNING_PHASE1) {
6154                 time64_t duration = ktime_get_seconds() -
6155                                     lfsck->li_time_last_checkpoint;
6156                 u64 checked = lo->ll_objs_checked_phase1 +
6157                               com->lc_new_checked;
6158                 u64 speed = checked;
6159                 u64 new_checked = com->lc_new_checked;
6160                 time64_t rtime = lo->ll_run_time_phase1 + duration;
6161                 u64 pos;
6162
6163                 if (duration != 0)
6164                         new_checked = div64_s64(new_checked, duration);
6165                 if (rtime != 0)
6166                         speed = div64_s64(speed, rtime);
6167                 seq_printf(m, "checked_phase1: %llu\n"
6168                            "checked_phase2: %llu\n"
6169                            "run_time_phase1: %lld seconds\n"
6170                            "run_time_phase2: %lld seconds\n"
6171                            "average_speed_phase1: %llu items/sec\n"
6172                            "average_speed_phase2: N/A\n"
6173                            "real_time_speed_phase1: %llu items/sec\n"
6174                            "real_time_speed_phase2: N/A\n",
6175                            checked,
6176                            lo->ll_objs_checked_phase2,
6177                            rtime,
6178                            lo->ll_run_time_phase2,
6179                            speed,
6180                            new_checked);
6181
6182                 if (likely(lfsck->li_di_oit)) {
6183                         const struct dt_it_ops *iops =
6184                                 &lfsck->li_obj_oit->do_index_ops->dio_it;
6185
6186                         /* The low layer otable-based iteration position may NOT
6187                          * exactly match the layout-based directory traversal
6188                          * cookie. Generally, it is not a serious issue. But the
6189                          * caller should NOT make assumption on that. */
6190                         pos = iops->store(env, lfsck->li_di_oit);
6191                         if (!lfsck->li_current_oit_processed)
6192                                 pos--;
6193                 } else {
6194                         pos = lo->ll_pos_last_checkpoint;
6195                 }
6196
6197                 seq_printf(m, "current_position: %llu\n", pos);
6198         } else if (lo->ll_status == LS_SCANNING_PHASE2) {
6199                 time64_t duration = ktime_get_seconds() -
6200                                     com->lc_time_last_checkpoint;
6201                 u64 checked = lo->ll_objs_checked_phase2 +
6202                               com->lc_new_checked;
6203                 u64 speed1 = lo->ll_objs_checked_phase1;
6204                 u64 speed2 = checked;
6205                 u64 new_checked = com->lc_new_checked;
6206                 time64_t rtime = lo->ll_run_time_phase2 + duration;
6207
6208                 if (duration != 0)
6209                         new_checked = div64_s64(new_checked, duration);
6210                 if (lo->ll_run_time_phase1 != 0)
6211                         speed1 = div64_s64(speed1, lo->ll_run_time_phase1);
6212                 if (rtime != 0)
6213                         speed2 = div64_s64(speed2, rtime);
6214                 seq_printf(m, "checked_phase1: %llu\n"
6215                            "checked_phase2: %llu\n"
6216                            "run_time_phase1: %lld seconds\n"
6217                            "run_time_phase2: %lld seconds\n"
6218                            "average_speed_phase1: %llu items/sec\n"
6219                            "average_speed_phase2: %llu items/sec\n"
6220                            "real_time_speed_phase1: N/A\n"
6221                            "real_time_speed_phase2: %llu items/sec\n"
6222                            "current_position: "DFID"\n",
6223                            lo->ll_objs_checked_phase1,
6224                            checked,
6225                            lo->ll_run_time_phase1,
6226                            rtime,
6227                            speed1,
6228                            speed2,
6229                            new_checked,
6230                            PFID(&com->lc_fid_latest_scanned_phase2));
6231         } else {
6232                 __u64 speed1 = lo->ll_objs_checked_phase1;
6233                 __u64 speed2 = lo->ll_objs_checked_phase2;
6234
6235                 if (lo->ll_run_time_phase1 != 0)
6236                         speed1 = div64_s64(speed1, lo->ll_run_time_phase1);
6237                 if (lo->ll_run_time_phase2 != 0)
6238                         speed2 = div64_s64(speed2, lo->ll_run_time_phase2);
6239                 seq_printf(m, "checked_phase1: %llu\n"
6240                            "checked_phase2: %llu\n"
6241                            "run_time_phase1: %lld seconds\n"
6242                            "run_time_phase2: %lld seconds\n"
6243                            "average_speed_phase1: %llu items/sec\n"
6244                            "average_speed_phase2: %llu objs/sec\n"
6245                            "real_time_speed_phase1: N/A\n"
6246                            "real_time_speed_phase2: N/A\n"
6247                            "current_position: N/A\n",
6248                            lo->ll_objs_checked_phase1,
6249                            lo->ll_objs_checked_phase2,
6250                            lo->ll_run_time_phase1,
6251                            lo->ll_run_time_phase2,
6252                            speed1,
6253                            speed2);
6254         }
6255
6256         up_read(&com->lc_sem);
6257 }
6258
6259 static int lfsck_layout_master_double_scan(const struct lu_env *env,
6260                                            struct lfsck_component *com)
6261 {
6262         struct lfsck_layout             *lo     = com->lc_file_ram;
6263         struct lfsck_assistant_data     *lad    = com->lc_data;
6264         struct lfsck_instance           *lfsck  = com->lc_lfsck;
6265         struct lfsck_tgt_descs          *ltds;
6266         struct lfsck_tgt_desc           *ltd;
6267         struct lfsck_tgt_desc           *next;
6268         int                              rc;
6269
6270         rc = lfsck_double_scan_generic(env, com, lo->ll_status);
6271
6272         if (thread_is_stopped(&lad->lad_thread)) {
6273                 LASSERT(list_empty(&lad->lad_req_list));
6274                 LASSERT(list_empty(&lad->lad_ost_phase1_list));
6275                 LASSERT(list_empty(&lad->lad_mdt_phase1_list));
6276
6277                 ltds = &lfsck->li_ost_descs;
6278                 spin_lock(&ltds->ltd_lock);
6279                 list_for_each_entry_safe(ltd, next, &lad->lad_ost_phase2_list,
6280                                          ltd_layout_phase_list) {
6281                         list_del_init(&ltd->ltd_layout_phase_list);
6282                 }
6283                 spin_unlock(&ltds->ltd_lock);
6284
6285                 ltds = &lfsck->li_mdt_descs;
6286                 spin_lock(&ltds->ltd_lock);
6287                 list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase2_list,
6288                                          ltd_layout_phase_list) {
6289                         list_del_init(&ltd->ltd_layout_phase_list);
6290                 }
6291                 spin_unlock(&ltds->ltd_lock);
6292         }
6293
6294         return rc;
6295 }
6296
6297 static int lfsck_layout_slave_double_scan(const struct lu_env *env,
6298                                           struct lfsck_component *com)
6299 {
6300         struct lfsck_instance           *lfsck  = com->lc_lfsck;
6301         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
6302         struct lfsck_layout             *lo     = com->lc_file_ram;
6303         struct ptlrpc_thread            *thread = &lfsck->li_thread;
6304         int                              rc;
6305         ENTRY;
6306
6307         CDEBUG(D_LFSCK, "%s: layout LFSCK slave phase2 scan start\n",
6308                lfsck_lfsck2name(lfsck));
6309
6310         atomic_inc(&lfsck->li_double_scan_count);
6311
6312         if (lo->ll_flags & LF_INCOMPLETE)
6313                 GOTO(done, rc = 1);
6314
6315         com->lc_new_checked = 0;
6316         com->lc_new_scanned = 0;
6317         com->lc_time_last_checkpoint = ktime_get_seconds();
6318         com->lc_time_next_checkpoint = com->lc_time_last_checkpoint +
6319                                        LFSCK_CHECKPOINT_INTERVAL;
6320
6321         while (1) {
6322                 rc = lfsck_layout_slave_query_master(env, com);
6323                 if (list_empty(&llsd->llsd_master_list)) {
6324                         if (unlikely(!thread_is_running(thread)))
6325                                 rc = 0;
6326                         else
6327                                 rc = 1;
6328
6329                         GOTO(done, rc);
6330                 }
6331
6332                 if (rc < 0)
6333                         GOTO(done, rc);
6334
6335                 rc = wait_event_idle_timeout(
6336                         thread->t_ctl_waitq,
6337                         !thread_is_running(thread) ||
6338                         lo->ll_flags & LF_INCOMPLETE ||
6339                         list_empty(&llsd->llsd_master_list),
6340                         cfs_time_seconds(30));
6341                 if (unlikely(!thread_is_running(thread)))
6342                         GOTO(done, rc = 0);
6343
6344                 if (lo->ll_flags & LF_INCOMPLETE)
6345                         GOTO(done, rc = 1);
6346
6347                 if (rc == 0)
6348                         continue;
6349
6350                 GOTO(done, rc = 1);
6351         }
6352
6353 done:
6354         rc = lfsck_layout_double_scan_result(env, com, rc);
6355         lfsck_layout_slave_notify_master(env, com, LE_PHASE2_DONE,
6356                         (rc > 0 && lo->ll_flags & LF_INCOMPLETE) ? 0 : rc);
6357         lfsck_layout_slave_quit(env, com);
6358         if (atomic_dec_and_test(&lfsck->li_double_scan_count))
6359                 wake_up(&lfsck->li_thread.t_ctl_waitq);
6360
6361         CDEBUG(D_LFSCK, "%s: layout LFSCK slave phase2 scan finished, "
6362                "status %d: rc = %d\n",
6363                lfsck_lfsck2name(lfsck), lo->ll_status, rc);
6364
6365         return rc;
6366 }
6367
6368 static void lfsck_layout_master_data_release(const struct lu_env *env,
6369                                              struct lfsck_component *com)
6370 {
6371         struct lfsck_assistant_data     *lad    = com->lc_data;
6372         struct lfsck_instance           *lfsck  = com->lc_lfsck;
6373         struct lfsck_tgt_descs          *ltds;
6374         struct lfsck_tgt_desc           *ltd;
6375         struct lfsck_tgt_desc           *next;
6376
6377         LASSERT(lad != NULL);
6378         LASSERT(thread_is_init(&lad->lad_thread) ||
6379                 thread_is_stopped(&lad->lad_thread));
6380         LASSERT(list_empty(&lad->lad_req_list));
6381
6382         com->lc_data = NULL;
6383
6384         ltds = &lfsck->li_ost_descs;
6385         spin_lock(&ltds->ltd_lock);
6386         list_for_each_entry_safe(ltd, next, &lad->lad_ost_phase1_list,
6387                                  ltd_layout_phase_list) {
6388                 list_del_init(&ltd->ltd_layout_phase_list);
6389         }
6390         list_for_each_entry_safe(ltd, next, &lad->lad_ost_phase2_list,
6391                                  ltd_layout_phase_list) {
6392                 list_del_init(&ltd->ltd_layout_phase_list);
6393         }
6394         list_for_each_entry_safe(ltd, next, &lad->lad_ost_list,
6395                                  ltd_layout_list) {
6396                 list_del_init(&ltd->ltd_layout_list);
6397         }
6398         spin_unlock(&ltds->ltd_lock);
6399
6400         ltds = &lfsck->li_mdt_descs;
6401         spin_lock(&ltds->ltd_lock);
6402         list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase1_list,
6403                                  ltd_layout_phase_list) {
6404                 list_del_init(&ltd->ltd_layout_phase_list);
6405         }
6406         list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase2_list,
6407                                  ltd_layout_phase_list) {
6408                 list_del_init(&ltd->ltd_layout_phase_list);
6409         }
6410         list_for_each_entry_safe(ltd, next, &lad->lad_mdt_list,
6411                                  ltd_layout_list) {
6412                 list_del_init(&ltd->ltd_layout_list);
6413         }
6414         spin_unlock(&ltds->ltd_lock);
6415
6416         if (likely(lad->lad_bitmap != NULL))
6417                 CFS_FREE_BITMAP(lad->lad_bitmap);
6418
6419         OBD_FREE_PTR(lad);
6420 }
6421
6422 static void lfsck_layout_slave_data_release(const struct lu_env *env,
6423                                             struct lfsck_component *com)
6424 {
6425         struct lfsck_layout_slave_data *llsd = com->lc_data;
6426
6427         lfsck_layout_slave_quit(env, com);
6428         com->lc_data = NULL;
6429         OBD_FREE_PTR(llsd);
6430 }
6431
6432 static void lfsck_layout_master_quit(const struct lu_env *env,
6433                                      struct lfsck_component *com)
6434 {
6435         struct lfsck_assistant_data     *lad    = com->lc_data;
6436         struct lfsck_instance           *lfsck  = com->lc_lfsck;
6437         struct lfsck_tgt_descs          *ltds;
6438         struct lfsck_tgt_desc           *ltd;
6439         struct lfsck_tgt_desc           *next;
6440
6441         LASSERT(lad != NULL);
6442
6443         lfsck_quit_generic(env, com);
6444
6445         LASSERT(thread_is_init(&lad->lad_thread) ||
6446                 thread_is_stopped(&lad->lad_thread));
6447         LASSERT(list_empty(&lad->lad_req_list));
6448
6449         ltds = &lfsck->li_ost_descs;
6450         spin_lock(&ltds->ltd_lock);
6451         list_for_each_entry_safe(ltd, next, &lad->lad_ost_phase1_list,
6452                                  ltd_layout_phase_list) {
6453                 list_del_init(&ltd->ltd_layout_phase_list);
6454         }
6455         list_for_each_entry_safe(ltd, next, &lad->lad_ost_phase2_list,
6456                                  ltd_layout_phase_list) {
6457                 list_del_init(&ltd->ltd_layout_phase_list);
6458         }
6459         spin_unlock(&ltds->ltd_lock);
6460
6461         ltds = &lfsck->li_mdt_descs;
6462         spin_lock(&ltds->ltd_lock);
6463         list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase1_list,
6464                                  ltd_layout_phase_list) {
6465                 list_del_init(&ltd->ltd_layout_phase_list);
6466         }
6467         list_for_each_entry_safe(ltd, next, &lad->lad_mdt_phase2_list,
6468                                  ltd_layout_phase_list) {
6469                 list_del_init(&ltd->ltd_layout_phase_list);
6470         }
6471         spin_unlock(&ltds->ltd_lock);
6472 }
6473
6474 static void lfsck_layout_slave_quit(const struct lu_env *env,
6475                                     struct lfsck_component *com)
6476 {
6477         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
6478         struct lfsck_layout_seq          *lls;
6479         struct lfsck_layout_seq          *next;
6480         struct lfsck_layout_slave_target *llst;
6481
6482         LASSERT(llsd != NULL);
6483
6484         down_write(&com->lc_sem);
6485         list_for_each_entry_safe(lls, next, &llsd->llsd_seq_list,
6486                                  lls_list) {
6487                 list_del_init(&lls->lls_list);
6488                 lfsck_object_put(env, lls->lls_lastid_obj);
6489                 OBD_FREE_PTR(lls);
6490         }
6491         up_write(&com->lc_sem);
6492
6493         spin_lock(&llsd->llsd_lock);
6494         while (!list_empty(&llsd->llsd_master_list)) {
6495                 llst = list_entry(llsd->llsd_master_list.next,
6496                                   struct lfsck_layout_slave_target, llst_list);
6497                 list_del_init(&llst->llst_list);
6498                 spin_unlock(&llsd->llsd_lock);
6499                 lfsck_layout_llst_put(llst);
6500                 spin_lock(&llsd->llsd_lock);
6501         }
6502         spin_unlock(&llsd->llsd_lock);
6503
6504         lfsck_rbtree_cleanup(env, com);
6505 }
6506
6507 static int lfsck_layout_master_in_notify(const struct lu_env *env,
6508                                          struct lfsck_component *com,
6509                                          struct lfsck_request *lr)
6510 {
6511         struct lfsck_instance           *lfsck = com->lc_lfsck;
6512         struct lfsck_layout             *lo    = com->lc_file_ram;
6513         struct lfsck_assistant_data     *lad   = com->lc_data;
6514         struct lfsck_tgt_descs          *ltds;
6515         struct lfsck_tgt_desc           *ltd;
6516         bool                             fail  = false;
6517         ENTRY;
6518
6519         if (lr->lr_event == LE_PAIRS_VERIFY) {
6520                 int rc;
6521
6522                 rc = lfsck_layout_master_check_pairs(env, com, &lr->lr_fid,
6523                                                      &lr->lr_fid2,
6524                                                      lr->lr_comp_id);
6525
6526                 RETURN(rc);
6527         }
6528
6529         CDEBUG(D_LFSCK, "%s: layout LFSCK master handles notify %u "
6530                "from %s %x, status %d, flags %x, flags2 %x\n",
6531                lfsck_lfsck2name(lfsck), lr->lr_event,
6532                (lr->lr_flags & LEF_FROM_OST) ? "OST" : "MDT",
6533                lr->lr_index, lr->lr_status, lr->lr_flags, lr->lr_flags2);
6534
6535         if (lr->lr_event != LE_PHASE1_DONE &&
6536             lr->lr_event != LE_PHASE2_DONE &&
6537             lr->lr_event != LE_PEER_EXIT)
6538                 RETURN(-EINVAL);
6539
6540         if (lr->lr_flags & LEF_FROM_OST)
6541                 ltds = &lfsck->li_ost_descs;
6542         else
6543                 ltds = &lfsck->li_mdt_descs;
6544         spin_lock(&ltds->ltd_lock);
6545         ltd = lfsck_ltd2tgt(ltds, lr->lr_index);
6546         if (ltd == NULL) {
6547                 spin_unlock(&ltds->ltd_lock);
6548
6549                 RETURN(-ENXIO);
6550         }
6551
6552         list_del_init(&ltd->ltd_layout_phase_list);
6553         switch (lr->lr_event) {
6554         case LE_PHASE1_DONE:
6555                 if (lr->lr_status <= 0 || lr->lr_flags2 & LF_INCOMPLETE) {
6556                         if (lr->lr_flags2 & LF_INCOMPLETE) {
6557                                 if (lr->lr_flags & LEF_FROM_OST)
6558                                         lfsck_lad_set_bitmap(env, com,
6559                                                              ltd->ltd_index);
6560                                 else
6561                                         lo->ll_flags |= LF_INCOMPLETE;
6562                         }
6563                         ltd->ltd_layout_done = 1;
6564                         list_del_init(&ltd->ltd_layout_list);
6565                         fail = true;
6566                         break;
6567                 }
6568
6569                 if (lr->lr_flags & LEF_FROM_OST) {
6570                         if (list_empty(&ltd->ltd_layout_list))
6571                                 list_add_tail(&ltd->ltd_layout_list,
6572                                               &lad->lad_ost_list);
6573                         list_add_tail(&ltd->ltd_layout_phase_list,
6574                                       &lad->lad_ost_phase2_list);
6575                 } else {
6576                         if (list_empty(&ltd->ltd_layout_list))
6577                                 list_add_tail(&ltd->ltd_layout_list,
6578                                               &lad->lad_mdt_list);
6579                         list_add_tail(&ltd->ltd_layout_phase_list,
6580                                       &lad->lad_mdt_phase2_list);
6581                 }
6582                 break;
6583         case LE_PHASE2_DONE:
6584                 ltd->ltd_layout_done = 1;
6585                 if (!list_empty(&ltd->ltd_layout_list))
6586                         list_del_init(&ltd->ltd_layout_list);
6587
6588                 if (lr->lr_flags2 & LF_INCOMPLETE) {
6589                         lfsck_lad_set_bitmap(env, com, ltd->ltd_index);
6590                         fail = true;
6591                 }
6592
6593                 break;
6594         case LE_PEER_EXIT:
6595                 fail = true;
6596                 ltd->ltd_layout_done = 1;
6597                 list_del_init(&ltd->ltd_layout_list);
6598                 if (!(lfsck->li_bookmark_ram.lb_param & LPF_FAILOUT) &&
6599                     !(lr->lr_flags & LEF_FROM_OST))
6600                                 lo->ll_flags |= LF_INCOMPLETE;
6601                 break;
6602         default:
6603                 break;
6604         }
6605         spin_unlock(&ltds->ltd_lock);
6606
6607         if (fail && lfsck->li_bookmark_ram.lb_param & LPF_FAILOUT) {
6608                 struct lfsck_stop *stop = &lfsck_env_info(env)->lti_stop;
6609
6610                 memset(stop, 0, sizeof(*stop));
6611                 stop->ls_status = lr->lr_status;
6612                 stop->ls_flags = lr->lr_param & ~LPF_BROADCAST;
6613                 lfsck_stop(env, lfsck->li_bottom, stop);
6614         } else if (lfsck_phase2_next_ready(lad)) {
6615                 wake_up(&lad->lad_thread.t_ctl_waitq);
6616         }
6617
6618         RETURN(0);
6619 }
6620
6621 static int lfsck_layout_slave_in_notify_local(const struct lu_env *env,
6622                                               struct lfsck_component *com,
6623                                               struct lfsck_req_local *lrl,
6624                                               struct thandle *th)
6625 {
6626         ENTRY;
6627
6628         switch (lrl->lrl_event) {
6629         case LEL_FID_ACCESSED:
6630                 lfsck_rbtree_update_bitmap(env, com, &lrl->lrl_fid, true);
6631                 RETURN(0);
6632         case LEL_PAIRS_VERIFY_LOCAL: {
6633                 int rc;
6634
6635                 lrl->lrl_status = LPVS_INIT;
6636                 /* Firstly, if the MDT-object which is claimed via OST-object
6637                  * local stored PFID xattr recognizes the OST-object, then it
6638                  * must be that the client given PFID is wrong. */
6639                 rc = lfsck_layout_slave_check_pairs(env, com, &lrl->lrl_fid,
6640                                 &lrl->lrl_ff_local.ff_parent,
6641                                 lrl->lrl_ff_local.ff_layout.ol_comp_id);
6642                 if (rc <= 0)
6643                         RETURN(0);
6644
6645                 lrl->lrl_status = LPVS_INCONSISTENT;
6646                 /* The OST-object local stored PFID xattr is stale. We need to
6647                  * check whether the MDT-object that is claimed via the client
6648                  * given PFID information recognizes the OST-object or not. If
6649                  * matches, then need to update the OST-object's PFID xattr. */
6650                 rc = lfsck_layout_slave_check_pairs(env, com, &lrl->lrl_fid,
6651                                 &lrl->lrl_ff_client.ff_parent,
6652                                 lrl->lrl_ff_client.ff_layout.ol_comp_id);
6653                 /* For rc < 0 case:
6654                  * We are not sure whether the client given PFID information
6655                  * is correct or not, do nothing to avoid improper fixing.
6656                  *
6657                  * For rc > 0 case:
6658                  * The client given PFID information is also invalid, we can
6659                  * NOT fix the OST-object inconsistency.
6660                  */
6661                 if (!rc) {
6662                         lrl->lrl_status = LPVS_INCONSISTENT_TOFIX;
6663                         rc = lfsck_layout_slave_repair_pfid(env, com, lrl);
6664                 }
6665
6666                 RETURN(rc);
6667         }
6668         default:
6669                 break;
6670         }
6671
6672         RETURN(-EOPNOTSUPP);
6673 }
6674
6675 static int lfsck_layout_slave_in_notify(const struct lu_env *env,
6676                                         struct lfsck_component *com,
6677                                         struct lfsck_request *lr)
6678 {
6679         struct lfsck_instance *lfsck = com->lc_lfsck;
6680         struct lfsck_layout_slave_data *llsd = com->lc_data;
6681         struct lfsck_layout_slave_target *llst;
6682         int rc;
6683         ENTRY;
6684
6685         switch (lr->lr_event) {
6686         case LE_CONDITIONAL_DESTROY:
6687                 rc = lfsck_layout_slave_conditional_destroy(env, com, lr);
6688                 RETURN(rc);
6689         case LE_PHASE1_DONE: {
6690                 if (lr->lr_flags2 & LF_INCOMPLETE) {
6691                         struct lfsck_layout *lo = com->lc_file_ram;
6692
6693                         lo->ll_flags |= LF_INCOMPLETE;
6694                         llst = lfsck_layout_llst_find_and_del(llsd,
6695                                                               lr->lr_index,
6696                                                               true);
6697                         if (llst != NULL) {
6698                                 lfsck_layout_llst_put(llst);
6699                                 wake_up(&lfsck->li_thread.t_ctl_waitq);
6700                         }
6701                 }
6702
6703                 RETURN(0);
6704         }
6705         case LE_PHASE2_DONE:
6706         case LE_PEER_EXIT:
6707                 CDEBUG(D_LFSCK, "%s: layout LFSCK slave handle notify %u "
6708                        "from MDT %x, status %d\n", lfsck_lfsck2name(lfsck),
6709                        lr->lr_event, lr->lr_index, lr->lr_status);
6710                 break;
6711         default:
6712                 RETURN(-EINVAL);
6713         }
6714
6715         llst = lfsck_layout_llst_find_and_del(llsd, lr->lr_index, true);
6716         if (llst == NULL)
6717                 RETURN(0);
6718
6719         lfsck_layout_llst_put(llst);
6720         if (list_empty(&llsd->llsd_master_list))
6721                 wake_up(&lfsck->li_thread.t_ctl_waitq);
6722
6723         if (lr->lr_event == LE_PEER_EXIT &&
6724             (lfsck->li_bookmark_ram.lb_param & LPF_FAILOUT ||
6725              (list_empty(&llsd->llsd_master_list) &&
6726               (lr->lr_status == LS_STOPPED ||
6727                lr->lr_status == LS_CO_STOPPED)))) {
6728                 struct lfsck_stop *stop = &lfsck_env_info(env)->lti_stop;
6729
6730                 memset(stop, 0, sizeof(*stop));
6731                 stop->ls_status = lr->lr_status;
6732                 stop->ls_flags = lr->lr_param & ~LPF_BROADCAST;
6733                 lfsck_stop(env, lfsck->li_bottom, stop);
6734         }
6735
6736         RETURN(0);
6737 }
6738
6739 static void lfsck_layout_repaired(struct lfsck_layout *lo, __u64 *count)
6740 {
6741         int i;
6742
6743         for (i = 0; i < LLIT_MAX; i++)
6744                 *count += lo->ll_objs_repaired[i];
6745 }
6746
6747 static int lfsck_layout_query_all(const struct lu_env *env,
6748                                   struct lfsck_component *com,
6749                                   __u32 *mdts_count, __u32 *osts_count,
6750                                   __u64 *repaired)
6751 {
6752         struct lfsck_layout *lo = com->lc_file_ram;
6753         struct lfsck_tgt_descs *ltds;
6754         struct lfsck_tgt_desc *ltd;
6755         int idx;
6756         int rc;
6757         ENTRY;
6758
6759         rc = lfsck_query_all(env, com);
6760         if (rc != 0)
6761                 RETURN(rc);
6762
6763         ltds = &com->lc_lfsck->li_mdt_descs;
6764         down_read(&ltds->ltd_rw_sem);
6765         cfs_foreach_bit(ltds->ltd_tgts_bitmap, idx) {
6766                 ltd = lfsck_ltd2tgt(ltds, idx);
6767                 LASSERT(ltd != NULL);
6768
6769                 mdts_count[ltd->ltd_layout_status]++;
6770                 *repaired += ltd->ltd_layout_repaired;
6771         }
6772         up_read(&ltds->ltd_rw_sem);
6773
6774         ltds = &com->lc_lfsck->li_ost_descs;
6775         down_read(&ltds->ltd_rw_sem);
6776         cfs_foreach_bit(ltds->ltd_tgts_bitmap, idx) {
6777                 ltd = lfsck_ltd2tgt(ltds, idx);
6778                 LASSERT(ltd != NULL);
6779
6780                 osts_count[ltd->ltd_layout_status]++;
6781                 *repaired += ltd->ltd_layout_repaired;
6782         }
6783         up_read(&ltds->ltd_rw_sem);
6784
6785         down_read(&com->lc_sem);
6786         mdts_count[lo->ll_status]++;
6787         lfsck_layout_repaired(lo, repaired);
6788         up_read(&com->lc_sem);
6789
6790         RETURN(0);
6791 }
6792
6793 static int lfsck_layout_query(const struct lu_env *env,
6794                               struct lfsck_component *com,
6795                               struct lfsck_request *req,
6796                               struct lfsck_reply *rep,
6797                               struct lfsck_query *que, int idx)
6798 {
6799         struct lfsck_layout *lo = com->lc_file_ram;
6800         int rc = 0;
6801
6802         if (que != NULL) {
6803                 LASSERT(com->lc_lfsck->li_master);
6804
6805                 rc = lfsck_layout_query_all(env, com,
6806                                             que->lu_mdts_count[idx],
6807                                             que->lu_osts_count[idx],
6808                                             &que->lu_repaired[idx]);
6809         } else {
6810                 down_read(&com->lc_sem);
6811                 rep->lr_status = lo->ll_status;
6812                 if (req->lr_flags & LEF_QUERY_ALL)
6813                         lfsck_layout_repaired(lo, &rep->lr_repaired);
6814                 up_read(&com->lc_sem);
6815         }
6816
6817         return rc;
6818 }
6819
6820 /* with lfsck::li_lock held */
6821 static int lfsck_layout_slave_join(const struct lu_env *env,
6822                                    struct lfsck_component *com,
6823                                    struct lfsck_start_param *lsp)
6824 {
6825         struct lfsck_instance            *lfsck = com->lc_lfsck;
6826         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
6827         struct lfsck_layout_slave_target *llst;
6828         struct lfsck_start               *start = lsp->lsp_start;
6829         int                               rc    = 0;
6830         ENTRY;
6831
6832         if (start == NULL || !(start->ls_flags & LPF_OST_ORPHAN))
6833                 RETURN(0);
6834
6835         if (!lsp->lsp_index_valid)
6836                 RETURN(-EINVAL);
6837
6838         /* If someone is running the LFSCK without orphan handling,
6839          * it will not maintain the object accessing rbtree. So we
6840          * cannot join it for orphan handling. */
6841         if (!llsd->llsd_rbtree_valid)
6842                 RETURN(-EBUSY);
6843
6844         spin_unlock(&lfsck->li_lock);
6845         rc = lfsck_layout_llst_add(llsd, lsp->lsp_index);
6846         spin_lock(&lfsck->li_lock);
6847         if (rc == 0 && !thread_is_running(&lfsck->li_thread)) {
6848                 spin_unlock(&lfsck->li_lock);
6849                 llst = lfsck_layout_llst_find_and_del(llsd, lsp->lsp_index,
6850                                                       true);
6851                 if (llst != NULL)
6852                         lfsck_layout_llst_put(llst);
6853                 spin_lock(&lfsck->li_lock);
6854                 rc = -EAGAIN;
6855         }
6856
6857         RETURN(rc);
6858 }
6859
6860 static const struct lfsck_operations lfsck_layout_master_ops = {
6861         .lfsck_reset            = lfsck_layout_reset,
6862         .lfsck_fail             = lfsck_layout_fail,
6863         .lfsck_checkpoint       = lfsck_layout_master_checkpoint,
6864         .lfsck_prep             = lfsck_layout_master_prep,
6865         .lfsck_exec_oit         = lfsck_layout_master_exec_oit,
6866         .lfsck_exec_dir         = lfsck_layout_exec_dir,
6867         .lfsck_post             = lfsck_layout_master_post,
6868         .lfsck_dump             = lfsck_layout_dump,
6869         .lfsck_double_scan      = lfsck_layout_master_double_scan,
6870         .lfsck_data_release     = lfsck_layout_master_data_release,
6871         .lfsck_quit             = lfsck_layout_master_quit,
6872         .lfsck_in_notify        = lfsck_layout_master_in_notify,
6873         .lfsck_query            = lfsck_layout_query,
6874 };
6875
6876 static const struct lfsck_operations lfsck_layout_slave_ops = {
6877         .lfsck_reset            = lfsck_layout_reset,
6878         .lfsck_fail             = lfsck_layout_fail,
6879         .lfsck_checkpoint       = lfsck_layout_slave_checkpoint,
6880         .lfsck_prep             = lfsck_layout_slave_prep,
6881         .lfsck_exec_oit         = lfsck_layout_slave_exec_oit,
6882         .lfsck_exec_dir         = lfsck_layout_exec_dir,
6883         .lfsck_post             = lfsck_layout_slave_post,
6884         .lfsck_dump             = lfsck_layout_dump,
6885         .lfsck_double_scan      = lfsck_layout_slave_double_scan,
6886         .lfsck_data_release     = lfsck_layout_slave_data_release,
6887         .lfsck_quit             = lfsck_layout_slave_quit,
6888         .lfsck_in_notify_local  = lfsck_layout_slave_in_notify_local,
6889         .lfsck_in_notify        = lfsck_layout_slave_in_notify,
6890         .lfsck_query            = lfsck_layout_query,
6891         .lfsck_join             = lfsck_layout_slave_join,
6892 };
6893
6894 static void lfsck_layout_assistant_fill_pos(const struct lu_env *env,
6895                                             struct lfsck_component *com,
6896                                             struct lfsck_position *pos)
6897 {
6898         struct lfsck_assistant_data     *lad = com->lc_data;
6899         struct lfsck_layout_req         *llr;
6900
6901         if (((struct lfsck_layout *)(com->lc_file_ram))->ll_status !=
6902             LS_SCANNING_PHASE1)
6903                 return;
6904
6905         if (list_empty(&lad->lad_req_list))
6906                 return;
6907
6908         llr = list_entry(lad->lad_req_list.next,
6909                          struct lfsck_layout_req,
6910                          llr_lar.lar_list);
6911         pos->lp_oit_cookie = llr->llr_lar.lar_parent->lso_oit_cookie - 1;
6912 }
6913
6914 const struct lfsck_assistant_operations lfsck_layout_assistant_ops = {
6915         .la_handler_p1          = lfsck_layout_assistant_handler_p1,
6916         .la_handler_p2          = lfsck_layout_assistant_handler_p2,
6917         .la_fill_pos            = lfsck_layout_assistant_fill_pos,
6918         .la_double_scan_result  = lfsck_layout_double_scan_result,
6919         .la_req_fini            = lfsck_layout_assistant_req_fini,
6920         .la_sync_failures       = lfsck_layout_assistant_sync_failures,
6921 };
6922
6923 int lfsck_layout_setup(const struct lu_env *env, struct lfsck_instance *lfsck)
6924 {
6925         struct lfsck_component  *com;
6926         struct lfsck_layout     *lo;
6927         struct dt_object        *root = NULL;
6928         struct dt_object        *obj;
6929         int                      i;
6930         int                      rc;
6931         ENTRY;
6932
6933         OBD_ALLOC_PTR(com);
6934         if (com == NULL)
6935                 RETURN(-ENOMEM);
6936
6937         INIT_LIST_HEAD(&com->lc_link);
6938         INIT_LIST_HEAD(&com->lc_link_dir);
6939         init_rwsem(&com->lc_sem);
6940         atomic_set(&com->lc_ref, 1);
6941         com->lc_lfsck = lfsck;
6942         com->lc_type = LFSCK_TYPE_LAYOUT;
6943         if (lfsck->li_master) {
6944                 com->lc_ops = &lfsck_layout_master_ops;
6945                 com->lc_data = lfsck_assistant_data_init(
6946                                 &lfsck_layout_assistant_ops,
6947                                 LFSCK_LAYOUT);
6948                 if (com->lc_data == NULL)
6949                         GOTO(out, rc = -ENOMEM);
6950
6951                 for (i = 0; i < LFSCK_STF_COUNT; i++)
6952                         mutex_init(&com->lc_sub_trace_objs[i].lsto_mutex);
6953         } else {
6954                 struct lfsck_layout_slave_data *llsd;
6955
6956                 com->lc_ops = &lfsck_layout_slave_ops;
6957                 OBD_ALLOC_PTR(llsd);
6958                 if (llsd == NULL)
6959                         GOTO(out, rc = -ENOMEM);
6960
6961                 INIT_LIST_HEAD(&llsd->llsd_seq_list);
6962                 INIT_LIST_HEAD(&llsd->llsd_master_list);
6963                 spin_lock_init(&llsd->llsd_lock);
6964                 llsd->llsd_rb_root = RB_ROOT;
6965                 init_rwsem(&llsd->llsd_rb_rwsem);
6966                 com->lc_data = llsd;
6967         }
6968         com->lc_file_size = sizeof(*lo);
6969         OBD_ALLOC(com->lc_file_ram, com->lc_file_size);
6970         if (com->lc_file_ram == NULL)
6971                 GOTO(out, rc = -ENOMEM);
6972
6973         OBD_ALLOC(com->lc_file_disk, com->lc_file_size);
6974         if (com->lc_file_disk == NULL)
6975                 GOTO(out, rc = -ENOMEM);
6976
6977         root = dt_locate(env, lfsck->li_bottom, &lfsck->li_local_root_fid);
6978         if (IS_ERR(root))
6979                 GOTO(out, rc = PTR_ERR(root));
6980
6981         if (unlikely(!dt_try_as_dir(env, root)))
6982                 GOTO(out, rc = -ENOTDIR);
6983
6984         obj = local_file_find_or_create(env, lfsck->li_los, root,
6985                                         LFSCK_LAYOUT,
6986                                         S_IFREG | S_IRUGO | S_IWUSR);
6987         if (IS_ERR(obj))
6988                 GOTO(out, rc = PTR_ERR(obj));
6989
6990         com->lc_obj = obj;
6991         rc = lfsck_layout_load(env, com);
6992         if (rc > 0) {
6993                 rc = lfsck_layout_reset(env, com, true);
6994         } else if (rc == -ENOENT) {
6995                 rc = lfsck_layout_init(env, com);
6996         } else if (lfsck->li_master) {
6997                 rc = lfsck_load_sub_trace_files(env, com,
6998                                 &dt_lfsck_layout_dangling_features,
6999                                 LFSCK_LAYOUT, false);
7000                 if (rc)
7001                         rc = lfsck_layout_reset(env, com, true);
7002         }
7003
7004         if (rc != 0)
7005                 GOTO(out, rc);
7006
7007         lo = com->lc_file_ram;
7008         switch (lo->ll_status) {
7009         case LS_INIT:
7010         case LS_COMPLETED:
7011         case LS_FAILED:
7012         case LS_STOPPED:
7013         case LS_PARTIAL:
7014                 spin_lock(&lfsck->li_lock);
7015                 list_add_tail(&com->lc_link, &lfsck->li_list_idle);
7016                 spin_unlock(&lfsck->li_lock);
7017                 break;
7018         default:
7019                 CERROR("%s: unknown lfsck_layout status %d\n",
7020                        lfsck_lfsck2name(lfsck), lo->ll_status);
7021                 fallthrough;
7022         case LS_SCANNING_PHASE1:
7023         case LS_SCANNING_PHASE2:
7024                 /* No need to store the status to disk right now.
7025                  * If the system crashed before the status stored,
7026                  * it will be loaded back when next time. */
7027                 lo->ll_status = LS_CRASHED;
7028                 if (!lfsck->li_master)
7029                         lo->ll_flags |= LF_INCOMPLETE;
7030                 fallthrough;
7031         case LS_PAUSED:
7032         case LS_CRASHED:
7033         case LS_CO_FAILED:
7034         case LS_CO_STOPPED:
7035         case LS_CO_PAUSED:
7036                 spin_lock(&lfsck->li_lock);
7037                 list_add_tail(&com->lc_link, &lfsck->li_list_scan);
7038                 spin_unlock(&lfsck->li_lock);
7039                 break;
7040         }
7041
7042         if (lo->ll_flags & LF_CRASHED_LASTID) {
7043                 LASSERT(lfsck->li_out_notify != NULL);
7044
7045                 lfsck->li_out_notify(env, lfsck->li_out_notify_data,
7046                                      LE_LASTID_REBUILDING);
7047         }
7048
7049         GOTO(out, rc = 0);
7050
7051 out:
7052         if (root != NULL && !IS_ERR(root))
7053                 lfsck_object_put(env, root);
7054
7055         if (rc != 0) {
7056                 lfsck_component_cleanup(env, com);
7057                 CERROR("%s: fail to init layout LFSCK component: rc = %d\n",
7058                        lfsck_lfsck2name(lfsck), rc);
7059         }
7060
7061         return rc;
7062 }
7063
7064 struct lfsck_orphan_it {
7065         struct lfsck_component           *loi_com;
7066         struct lfsck_rbtree_node         *loi_lrn;
7067         struct lfsck_layout_slave_target *loi_llst;
7068         struct lu_fid                     loi_key;
7069         struct lu_orphan_rec_v3           loi_rec;
7070         __u64                             loi_hash;
7071         unsigned int                      loi_over:1;
7072 };
7073
7074 static int lfsck_fid_match_idx(const struct lu_env *env,
7075                                struct lfsck_instance *lfsck,
7076                                const struct lu_fid *fid, int idx)
7077 {
7078         struct seq_server_site  *ss;
7079         struct lu_server_fld    *sf;
7080         struct lu_seq_range     *range = &lfsck_env_info(env)->lti_range;
7081         int                      rc;
7082
7083         /* All abnormal cases will be returned to MDT0. */
7084         if (!fid_is_norm(fid)) {
7085                 if (idx == 0)
7086                         return 1;
7087
7088                 return 0;
7089         }
7090
7091         ss = lfsck_dev_site(lfsck);
7092         if (unlikely(ss == NULL))
7093                 return -ENOTCONN;
7094
7095         sf = ss->ss_server_fld;
7096         LASSERT(sf != NULL);
7097
7098         fld_range_set_any(range);
7099         rc = fld_server_lookup(env, sf, fid_seq(fid), range);
7100         if (rc != 0)
7101                 return rc;
7102
7103         if (!fld_range_is_mdt(range))
7104                 return -EINVAL;
7105
7106         if (range->lsr_index == idx)
7107                 return 1;
7108
7109         return 0;
7110 }
7111
7112 static void lfsck_layout_destroy_orphan(const struct lu_env *env,
7113                                         struct lfsck_instance *lfsck,
7114                                         struct dt_object *obj)
7115 {
7116         struct dt_device        *dev    = lfsck_obj2dev(obj);
7117         struct thandle          *handle;
7118         int                      rc;
7119         ENTRY;
7120
7121         handle = lfsck_trans_create(env, dev, lfsck);
7122         if (IS_ERR(handle))
7123                 RETURN_EXIT;
7124
7125         rc = dt_declare_ref_del(env, obj, handle);
7126         if (rc != 0)
7127                 GOTO(stop, rc);
7128
7129         rc = dt_declare_destroy(env, obj, handle);
7130         if (rc != 0)
7131                 GOTO(stop, rc);
7132
7133         rc = dt_trans_start_local(env, dev, handle);
7134         if (rc != 0)
7135                 GOTO(stop, rc);
7136
7137         dt_write_lock(env, obj, 0);
7138         rc = dt_ref_del(env, obj, handle);
7139         if (rc == 0)
7140                 rc = dt_destroy(env, obj, handle);
7141         dt_write_unlock(env, obj);
7142
7143         GOTO(stop, rc);
7144
7145 stop:
7146         dt_trans_stop(env, dev, handle);
7147
7148         CDEBUG(D_LFSCK, "destroy orphan OST-object "DFID": rc = %d\n",
7149                PFID(lfsck_dto2fid(obj)), rc);
7150
7151         RETURN_EXIT;
7152 }
7153
7154 static int lfsck_orphan_index_lookup(const struct lu_env *env,
7155                                      struct dt_object *dt,
7156                                      struct dt_rec *rec,
7157                                      const struct dt_key *key)
7158 {
7159         return -EOPNOTSUPP;
7160 }
7161
7162 static int lfsck_orphan_index_declare_insert(const struct lu_env *env,
7163                                              struct dt_object *dt,
7164                                              const struct dt_rec *rec,
7165                                              const struct dt_key *key,
7166                                              struct thandle *handle)
7167 {
7168         return -EOPNOTSUPP;
7169 }
7170
7171 static int lfsck_orphan_index_insert(const struct lu_env *env,
7172                                      struct dt_object *dt,
7173                                      const struct dt_rec *rec,
7174                                      const struct dt_key *key,
7175                                      struct thandle *handle)
7176 {
7177         return -EOPNOTSUPP;
7178 }
7179
7180 static int lfsck_orphan_index_declare_delete(const struct lu_env *env,
7181                                              struct dt_object *dt,
7182                                              const struct dt_key *key,
7183                                              struct thandle *handle)
7184 {
7185         return -EOPNOTSUPP;
7186 }
7187
7188 static int lfsck_orphan_index_delete(const struct lu_env *env,
7189                                      struct dt_object *dt,
7190                                      const struct dt_key *key,
7191                                      struct thandle *handle)
7192 {
7193         return -EOPNOTSUPP;
7194 }
7195
7196 static struct dt_it *lfsck_orphan_it_init(const struct lu_env *env,
7197                                           struct dt_object *dt,
7198                                           __u32 attr)
7199 {
7200         struct dt_device                *dev    = lu2dt_dev(dt->do_lu.lo_dev);
7201         struct lfsck_instance           *lfsck;
7202         struct lfsck_component          *com    = NULL;
7203         struct lfsck_layout_slave_data  *llsd;
7204         struct lfsck_orphan_it          *it     = NULL;
7205         struct lfsck_layout             *lo;
7206         int                              rc     = 0;
7207         ENTRY;
7208
7209         lfsck = lfsck_instance_find(dev, true, false);
7210         if (unlikely(lfsck == NULL))
7211                 RETURN(ERR_PTR(-ENXIO));
7212
7213         com = lfsck_component_find(lfsck, LFSCK_TYPE_LAYOUT);
7214         if (unlikely(com == NULL))
7215                 GOTO(out, rc = -ENOENT);
7216
7217         lo = com->lc_file_ram;
7218         if (lo->ll_flags & LF_INCOMPLETE)
7219                 GOTO(out, rc = -ESRCH);
7220
7221         llsd = com->lc_data;
7222         if (!llsd->llsd_rbtree_valid)
7223                 GOTO(out, rc = -ESRCH);
7224
7225         OBD_ALLOC_PTR(it);
7226         if (it == NULL)
7227                 GOTO(out, rc = -ENOMEM);
7228
7229         it->loi_llst = lfsck_layout_llst_find_and_del(llsd, attr, false);
7230         if (it->loi_llst == NULL)
7231                 GOTO(out, rc = -ENXIO);
7232
7233         if (dev->dd_record_fid_accessed) {
7234                 /* The first iteration against the rbtree, scan the whole rbtree
7235                  * to remove the nodes which do NOT need to be handled. */
7236                 down_write(&llsd->llsd_rb_rwsem);
7237                 if (dev->dd_record_fid_accessed) {
7238                         struct rb_node                  *node;
7239                         struct rb_node                  *next;
7240                         struct lfsck_rbtree_node        *lrn;
7241
7242                         /* No need to record the fid accessing anymore. */
7243                         dev->dd_record_fid_accessed = 0;
7244
7245                         node = rb_first(&llsd->llsd_rb_root);
7246                         while (node != NULL) {
7247                                 next = rb_next(node);
7248                                 lrn = rb_entry(node, struct lfsck_rbtree_node,
7249                                                lrn_node);
7250                                 if (atomic_read(&lrn->lrn_known_count) <=
7251                                     atomic_read(&lrn->lrn_accessed_count)) {
7252                                         rb_erase(node, &llsd->llsd_rb_root);
7253                                         lfsck_rbtree_free(lrn);
7254                                 }
7255                                 node = next;
7256                         }
7257                 }
7258                 up_write(&llsd->llsd_rb_rwsem);
7259         }
7260
7261         /* read lock the rbtree when init, and unlock when fini */
7262         down_read(&llsd->llsd_rb_rwsem);
7263         it->loi_com = com;
7264         com = NULL;
7265
7266         GOTO(out, rc = 0);
7267
7268 out:
7269         if (com != NULL)
7270                 lfsck_component_put(env, com);
7271
7272         CDEBUG(D_LFSCK, "%s: init the orphan iteration: rc = %d\n",
7273                lfsck_lfsck2name(lfsck), rc);
7274
7275         lfsck_instance_put(env, lfsck);
7276         if (rc != 0) {
7277                 if (it != NULL)
7278                         OBD_FREE_PTR(it);
7279
7280                 it = (struct lfsck_orphan_it *)ERR_PTR(rc);
7281         }
7282
7283         return (struct dt_it *)it;
7284 }
7285
7286 static void lfsck_orphan_it_fini(const struct lu_env *env,
7287                                  struct dt_it *di)
7288 {
7289         struct lfsck_orphan_it           *it    = (struct lfsck_orphan_it *)di;
7290         struct lfsck_component           *com   = it->loi_com;
7291         struct lfsck_layout_slave_data   *llsd;
7292         struct lfsck_layout_slave_target *llst;
7293
7294         if (com != NULL) {
7295                 CDEBUG(D_LFSCK, "%s: fini the orphan iteration\n",
7296                        lfsck_lfsck2name(com->lc_lfsck));
7297
7298                 llsd = com->lc_data;
7299                 up_read(&llsd->llsd_rb_rwsem);
7300                 llst = it->loi_llst;
7301                 LASSERT(llst != NULL);
7302
7303                 /* Save the key and hash for iterate next. */
7304                 llst->llst_fid = it->loi_key;
7305                 llst->llst_hash = it->loi_hash;
7306                 lfsck_layout_llst_put(llst);
7307                 lfsck_component_put(env, com);
7308         }
7309         OBD_FREE_PTR(it);
7310 }
7311
7312 /**
7313  * \retval       +1: the iteration finished
7314  * \retval        0: on success, not finished
7315  * \retval      -ve: on error
7316  */
7317 static int lfsck_orphan_it_next(const struct lu_env *env,
7318                                 struct dt_it *di)
7319 {
7320         struct lfsck_thread_info        *info   = lfsck_env_info(env);
7321         struct filter_fid               *ff     = &info->lti_ff;
7322         struct lu_attr                  *la     = &info->lti_la;
7323         struct lfsck_orphan_it          *it     = (struct lfsck_orphan_it *)di;
7324         struct lu_fid                   *key    = &it->loi_key;
7325         struct lu_orphan_rec_v3         *rec    = &it->loi_rec;
7326         struct ost_layout               *ol     = &rec->lor_layout;
7327         struct lfsck_component          *com    = it->loi_com;
7328         struct lfsck_instance           *lfsck  = com->lc_lfsck;
7329         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
7330         struct dt_object                *obj;
7331         struct lfsck_rbtree_node        *lrn;
7332         int                              pos;
7333         int                              rc;
7334         __u32                            save;
7335         __u32                            idx    = it->loi_llst->llst_index;
7336         bool                             exact  = false;
7337         ENTRY;
7338
7339         if (it->loi_over)
7340                 RETURN(1);
7341
7342 again0:
7343         lrn = it->loi_lrn;
7344         if (lrn == NULL) {
7345                 lrn = lfsck_rbtree_search(llsd, key, &exact);
7346                 if (lrn == NULL) {
7347                         it->loi_over = 1;
7348                         RETURN(1);
7349                 }
7350
7351                 it->loi_lrn = lrn;
7352                 if (!exact) {
7353                         key->f_seq = lrn->lrn_seq;
7354                         key->f_oid = lrn->lrn_first_oid;
7355                         key->f_ver = 0;
7356                 }
7357         } else {
7358                 key->f_oid++;
7359                 if (unlikely(key->f_oid == 0)) {
7360                         key->f_seq++;
7361                         it->loi_lrn = NULL;
7362                         goto again0;
7363                 }
7364
7365                 if (key->f_oid >=
7366                     lrn->lrn_first_oid + LFSCK_RBTREE_BITMAP_WIDTH) {
7367                         it->loi_lrn = NULL;
7368                         goto again0;
7369                 }
7370         }
7371
7372         if (unlikely(atomic_read(&lrn->lrn_known_count) <=
7373                      atomic_read(&lrn->lrn_accessed_count))) {
7374                 struct rb_node *next = rb_next(&lrn->lrn_node);
7375
7376                 while (next != NULL) {
7377                         lrn = rb_entry(next, struct lfsck_rbtree_node,
7378                                        lrn_node);
7379                         if (atomic_read(&lrn->lrn_known_count) >
7380                             atomic_read(&lrn->lrn_accessed_count))
7381                                 break;
7382                         next = rb_next(next);
7383                 }
7384
7385                 if (next == NULL) {
7386                         it->loi_over = 1;
7387                         RETURN(1);
7388                 }
7389
7390                 it->loi_lrn = lrn;
7391                 key->f_seq = lrn->lrn_seq;
7392                 key->f_oid = lrn->lrn_first_oid;
7393                 key->f_ver = 0;
7394         }
7395
7396         pos = key->f_oid - lrn->lrn_first_oid;
7397
7398 again1:
7399         pos = find_next_bit(lrn->lrn_known_bitmap,
7400                             LFSCK_RBTREE_BITMAP_WIDTH, pos);
7401         if (pos >= LFSCK_RBTREE_BITMAP_WIDTH) {
7402                 key->f_oid = lrn->lrn_first_oid + pos;
7403                 if (unlikely(key->f_oid < lrn->lrn_first_oid)) {
7404                         key->f_seq++;
7405                         key->f_oid = 0;
7406                 }
7407                 it->loi_lrn = NULL;
7408                 goto again0;
7409         }
7410
7411         if (test_bit(pos, lrn->lrn_accessed_bitmap)) {
7412                 pos++;
7413                 goto again1;
7414         }
7415
7416         key->f_oid = lrn->lrn_first_oid + pos;
7417         obj = lfsck_object_find_bottom(env, lfsck, key);
7418         if (IS_ERR(obj)) {
7419                 rc = PTR_ERR(obj);
7420                 if (rc == -ENOENT) {
7421                         pos++;
7422                         goto again1;
7423                 }
7424                 RETURN(rc);
7425         }
7426
7427         dt_read_lock(env, obj, 0);
7428         if (dt_object_exists(obj) == 0 ||
7429             lfsck_is_dead_obj(obj)) {
7430                 dt_read_unlock(env, obj);
7431                 lfsck_object_put(env, obj);
7432                 pos++;
7433                 goto again1;
7434         }
7435
7436         rc = dt_attr_get(env, obj, la);
7437         if (rc != 0)
7438                 GOTO(out, rc);
7439
7440         rc = dt_xattr_get(env, obj, lfsck_buf_get(env, ff, sizeof(*ff)),
7441                           XATTR_NAME_FID);
7442         if (rc == -ENODATA) {
7443                 /* For the pre-created OST-object, update the bitmap to avoid
7444                  * others LFSCK (second phase) iteration to touch it again. */
7445                 if (la->la_ctime == 0) {
7446                         if (!test_and_set_bit(pos, lrn->lrn_accessed_bitmap))
7447                                 atomic_inc(&lrn->lrn_accessed_count);
7448
7449                         /* For the race between repairing dangling referenced
7450                          * MDT-object and unlink the file, it may left orphan
7451                          * OST-object there. Destroy it now! */
7452                         if (unlikely(!(la->la_mode & S_ISUID))) {
7453                                 dt_read_unlock(env, obj);
7454                                 lfsck_layout_destroy_orphan(env, lfsck, obj);
7455                                 lfsck_object_put(env, obj);
7456                                 pos++;
7457                                 goto again1;
7458                         }
7459                 } else if (idx == 0) {
7460                         /* If the orphan OST-object has no parent information,
7461                          * regard it as referenced by the MDT-object on MDT0. */
7462                         fid_zero(&rec->lor_rec.lor_fid);
7463                         rec->lor_rec.lor_uid = la->la_uid;
7464                         rec->lor_rec.lor_gid = la->la_gid;
7465                         memset(ol, 0, sizeof(*ol));
7466                         rec->lor_layout_version = 0;
7467                         rec->lor_range = 0;
7468
7469                         GOTO(out, rc = 0);
7470                 }
7471
7472                 dt_read_unlock(env, obj);
7473                 lfsck_object_put(env, obj);
7474                 pos++;
7475                 goto again1;
7476         }
7477
7478         if (rc < sizeof(struct lu_fid))
7479                 GOTO(out, rc = (rc < 0 ? rc : -EINVAL));
7480
7481         fid_le_to_cpu(&rec->lor_rec.lor_fid, &ff->ff_parent);
7482         /* Currently, the filter_fid::ff_parent::f_ver is not the real parent
7483          * MDT-object's FID::f_ver, instead it is the OST-object index in its
7484          * parent MDT-object's layout EA. */
7485         save = rec->lor_rec.lor_fid.f_stripe_idx;
7486         rec->lor_rec.lor_fid.f_ver = 0;
7487         rc = lfsck_fid_match_idx(env, lfsck, &rec->lor_rec.lor_fid, idx);
7488         /* If the orphan OST-object does not claim the MDT, then next.
7489          *
7490          * If we do not know whether it matches or not, then return it
7491          * to the MDT for further check. */
7492         if (rc == 0) {
7493                 dt_read_unlock(env, obj);
7494                 lfsck_object_put(env, obj);
7495                 pos++;
7496                 goto again1;
7497         }
7498
7499         rec->lor_rec.lor_fid.f_stripe_idx = save;
7500         rec->lor_rec.lor_uid = la->la_uid;
7501         rec->lor_rec.lor_gid = la->la_gid;
7502         ost_layout_le_to_cpu(ol, &ff->ff_layout);
7503         rec->lor_layout_version =
7504                 le32_to_cpu(ff->ff_layout_version & ~LU_LAYOUT_RESYNC);
7505         rec->lor_range = le32_to_cpu(ff->ff_range);
7506
7507         CDEBUG(D_LFSCK, "%s: return orphan "DFID", PFID "DFID", owner %u:%u, "
7508                "stripe size %u, stripe count %u, COMP id %u, COMP start %llu, "
7509                "COMP end %llu, layout version %u, range %u\n",
7510                lfsck_lfsck2name(com->lc_lfsck), PFID(key),
7511                PFID(&rec->lor_rec.lor_fid), rec->lor_rec.lor_uid,
7512                rec->lor_rec.lor_gid, ol->ol_stripe_size, ol->ol_stripe_count,
7513                ol->ol_comp_id, ol->ol_comp_start, ol->ol_comp_end,
7514                rec->lor_layout_version, rec->lor_range);
7515
7516         GOTO(out, rc = 0);
7517
7518 out:
7519         dt_read_unlock(env, obj);
7520         lfsck_object_put(env, obj);
7521         if (rc == 0)
7522                 it->loi_hash++;
7523
7524         return rc;
7525 }
7526
7527 /**
7528  * \retval       +1: locate to the exactly position
7529  * \retval        0: cannot locate to the exactly position,
7530  *                   call next() to move to a valid position.
7531  * \retval      -ve: on error
7532  */
7533 static int lfsck_orphan_it_get(const struct lu_env *env,
7534                                struct dt_it *di,
7535                                const struct dt_key *key)
7536 {
7537         struct lfsck_orphan_it  *it   = (struct lfsck_orphan_it *)di;
7538         int                      rc;
7539
7540         it->loi_key = *(struct lu_fid *)key;
7541         rc = lfsck_orphan_it_next(env, di);
7542         if (rc == 1)
7543                 return 0;
7544
7545         if (rc == 0)
7546                 return 1;
7547
7548         return rc;
7549 }
7550
7551 static void lfsck_orphan_it_put(const struct lu_env *env,
7552                                 struct dt_it *di)
7553 {
7554 }
7555
7556 static struct dt_key *lfsck_orphan_it_key(const struct lu_env *env,
7557                                           const struct dt_it *di)
7558 {
7559         struct lfsck_orphan_it *it = (struct lfsck_orphan_it *)di;
7560
7561         return (struct dt_key *)&it->loi_key;
7562 }
7563
7564 static int lfsck_orphan_it_key_size(const struct lu_env *env,
7565                                     const struct dt_it *di)
7566 {
7567         return sizeof(struct lu_fid);
7568 }
7569
7570 static int lfsck_orphan_it_rec(const struct lu_env *env,
7571                                const struct dt_it *di,
7572                                struct dt_rec *rec,
7573                                __u32 attr)
7574 {
7575         struct lfsck_orphan_it *it = (struct lfsck_orphan_it *)di;
7576
7577         *(struct lu_orphan_rec_v3 *)rec = it->loi_rec;
7578
7579         return 0;
7580 }
7581
7582 static __u64 lfsck_orphan_it_store(const struct lu_env *env,
7583                                    const struct dt_it *di)
7584 {
7585         struct lfsck_orphan_it  *it   = (struct lfsck_orphan_it *)di;
7586
7587         return it->loi_hash;
7588 }
7589
7590 /**
7591  * \retval       +1: locate to the exactly position
7592  * \retval        0: cannot locate to the exactly position,
7593  *                   call next() to move to a valid position.
7594  * \retval      -ve: on error
7595  */
7596 static int lfsck_orphan_it_load(const struct lu_env *env,
7597                                 const struct dt_it *di,
7598                                 __u64 hash)
7599 {
7600         struct lfsck_orphan_it           *it   = (struct lfsck_orphan_it *)di;
7601         struct lfsck_layout_slave_target *llst = it->loi_llst;
7602         int                               rc;
7603
7604         LASSERT(llst != NULL);
7605
7606         if (hash != llst->llst_hash) {
7607                 CDEBUG(D_LFSCK, "%s: the given hash %llu for orphan "
7608                        "iteration does not match the one when fini "
7609                        "%llu, to be reset.\n",
7610                        lfsck_lfsck2name(it->loi_com->lc_lfsck), hash,
7611                        llst->llst_hash);
7612                 fid_zero(&llst->llst_fid);
7613                 llst->llst_hash = 0;
7614         }
7615
7616         it->loi_key = llst->llst_fid;
7617         it->loi_hash = llst->llst_hash;
7618         rc = lfsck_orphan_it_next(env, (struct dt_it *)di);
7619         if (rc == 1)
7620                 return 0;
7621
7622         if (rc == 0)
7623                 return 1;
7624
7625         return rc;
7626 }
7627
7628 static int lfsck_orphan_it_key_rec(const struct lu_env *env,
7629                                    const struct dt_it *di,
7630                                    void *key_rec)
7631 {
7632         return 0;
7633 }
7634
7635 static const struct dt_index_operations lfsck_orphan_index_ops = {
7636         .dio_lookup             = lfsck_orphan_index_lookup,
7637         .dio_declare_insert     = lfsck_orphan_index_declare_insert,
7638         .dio_insert             = lfsck_orphan_index_insert,
7639         .dio_declare_delete     = lfsck_orphan_index_declare_delete,
7640         .dio_delete             = lfsck_orphan_index_delete,
7641         .dio_it = {
7642                 .init           = lfsck_orphan_it_init,
7643                 .fini           = lfsck_orphan_it_fini,
7644                 .get            = lfsck_orphan_it_get,
7645                 .put            = lfsck_orphan_it_put,
7646                 .next           = lfsck_orphan_it_next,
7647                 .key            = lfsck_orphan_it_key,
7648                 .key_size       = lfsck_orphan_it_key_size,
7649                 .rec            = lfsck_orphan_it_rec,
7650                 .store          = lfsck_orphan_it_store,
7651                 .load           = lfsck_orphan_it_load,
7652                 .key_rec        = lfsck_orphan_it_key_rec,
7653         }
7654 };