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) 2013, 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 <lustre/lustre_idl.h>
  40 #include <lu_object.h>
  41 #include <dt_object.h>
  42 #include <lustre_linkea.h>
  43 #include <lustre_fid.h>
  44 #include <lustre_lib.h>
  45 #include <lustre_net.h>
  46 #include <lustre/lustre_user.h>
  47 #include <md_object.h>
  48 #include <obd_class.h>
  49
  50 #include "lfsck_internal.h"
  51
  52 #define LFSCK_LAYOUT_MAGIC              0xB173AE14
  53
  54 static const char lfsck_layout_name[] = "lfsck_layout";
  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         __u64                   llst_gen;
  69         atomic_t                llst_ref;
  70         __u32                   llst_index;
  71 };
  72
  73 struct lfsck_layout_slave_data {
  74         /* list for lfsck_layout_seq */
  75         struct list_head         llsd_seq_list;
  76
  77         /* list for the masters involve layout verification. */
  78         struct list_head         llsd_master_list;
  79         spinlock_t               llsd_lock;
  80         __u64                    llsd_touch_gen;
  81         struct dt_object        *llsd_rb_obj;
  82         struct rb_root           llsd_rb_root;
  83         rwlock_t                 llsd_rb_lock;
  84         unsigned int             llsd_rbtree_valid:1;
  85 };
  86
  87 struct lfsck_layout_object {
  88         struct dt_object        *llo_obj;
  89         struct lu_attr           llo_attr;
  90         atomic_t                 llo_ref;
  91         __u16                    llo_gen;
  92 };
  93
  94 struct lfsck_layout_req {
  95         struct list_head                 llr_list;
  96         struct lfsck_layout_object      *llr_parent;
  97         struct dt_object                *llr_child;
  98         __u32                            llr_ost_idx;
  99         __u32                            llr_lov_idx; /* offset in LOV EA */
 100 };
 101
 102 struct lfsck_layout_master_data {
 103         spinlock_t              llmd_lock;
 104         struct list_head        llmd_req_list;
 105
 106         /* list for the ost targets involve layout verification. */
 107         struct list_head        llmd_ost_list;
 108
 109         /* list for the ost targets in phase1 scanning. */
 110         struct list_head        llmd_ost_phase1_list;
 111
 112         /* list for the ost targets in phase1 scanning. */
 113         struct list_head        llmd_ost_phase2_list;
 114
 115         /* list for the mdt targets involve layout verification. */
 116         struct list_head        llmd_mdt_list;
 117
 118         /* list for the mdt targets in phase1 scanning. */
 119         struct list_head        llmd_mdt_phase1_list;
 120
 121         /* list for the mdt targets in phase1 scanning. */
 122         struct list_head        llmd_mdt_phase2_list;
 123
 124         struct ptlrpc_thread    llmd_thread;
 125         __u32                   llmd_touch_gen;
 126         int                     llmd_prefetched;
 127         int                     llmd_assistant_status;
 128         int                     llmd_post_result;
 129         unsigned int            llmd_to_post:1,
 130                                 llmd_to_double_scan:1,
 131                                 llmd_in_double_scan:1,
 132                                 llmd_exit:1;
 133 };
 134
 135 struct lfsck_layout_slave_async_args {
 136         struct obd_export                *llsaa_exp;
 137         struct lfsck_component           *llsaa_com;
 138         struct lfsck_layout_slave_target *llsaa_llst;
 139 };
 140
 141 static struct lfsck_layout_object *
 142 lfsck_layout_object_init(const struct lu_env *env, struct dt_object *obj,
 143                          __u16 gen)
 144 {
 145         struct lfsck_layout_object *llo;
 146         int                         rc;
 147
 148         OBD_ALLOC_PTR(llo);
 149         if (llo == NULL)
 150                 return ERR_PTR(-ENOMEM);
 151
 152         rc = dt_attr_get(env, obj, &llo->llo_attr, BYPASS_CAPA);
 153         if (rc != 0) {
 154                 OBD_FREE_PTR(llo);
 155
 156                 return ERR_PTR(rc);
 157         }
 158
 159         lu_object_get(&obj->do_lu);
 160         llo->llo_obj = obj;
 161         /* The gen can be used to check whether some others have changed the
 162          * file layout after LFSCK pre-fetching but before real verification. */
 163         llo->llo_gen = gen;
 164         atomic_set(&llo->llo_ref, 1);
 165
 166         return llo;
 167 }
 168
 169 static inline void
 170 lfsck_layout_llst_put(struct lfsck_layout_slave_target *llst)
 171 {
 172         if (atomic_dec_and_test(&llst->llst_ref)) {
 173                 LASSERT(list_empty(&llst->llst_list));
 174
 175                 OBD_FREE_PTR(llst);
 176         }
 177 }
 178
 179 static inline int
 180 lfsck_layout_llst_add(struct lfsck_layout_slave_data *llsd, __u32 index)
 181 {
 182         struct lfsck_layout_slave_target *llst;
 183         struct lfsck_layout_slave_target *tmp;
 184         int                               rc   = 0;
 185
 186         OBD_ALLOC_PTR(llst);
 187         if (llst == NULL)
 188                 return -ENOMEM;
 189
 190         INIT_LIST_HEAD(&llst->llst_list);
 191         llst->llst_gen = 0;
 192         llst->llst_index = index;
 193         atomic_set(&llst->llst_ref, 1);
 194
 195         spin_lock(&llsd->llsd_lock);
 196         list_for_each_entry(tmp, &llsd->llsd_master_list, llst_list) {
 197                 if (tmp->llst_index == index) {
 198                         rc = -EALREADY;
 199                         break;
 200                 }
 201         }
 202         if (rc == 0)
 203                 list_add_tail(&llst->llst_list, &llsd->llsd_master_list);
 204         spin_unlock(&llsd->llsd_lock);
 205
 206         if (rc != 0)
 207                 OBD_FREE_PTR(llst);
 208
 209         return rc;
 210 }
 211
 212 static inline void
 213 lfsck_layout_llst_del(struct lfsck_layout_slave_data *llsd,
 214                       struct lfsck_layout_slave_target *llst)
 215 {
 216         bool del = false;
 217
 218         spin_lock(&llsd->llsd_lock);
 219         if (!list_empty(&llst->llst_list)) {
 220                 list_del_init(&llst->llst_list);
 221                 del = true;
 222         }
 223         spin_unlock(&llsd->llsd_lock);
 224
 225         if (del)
 226                 lfsck_layout_llst_put(llst);
 227 }
 228
 229 static inline struct lfsck_layout_slave_target *
 230 lfsck_layout_llst_find_and_del(struct lfsck_layout_slave_data *llsd,
 231                                __u32 index)
 232 {
 233         struct lfsck_layout_slave_target *llst;
 234
 235         spin_lock(&llsd->llsd_lock);
 236         list_for_each_entry(llst, &llsd->llsd_master_list, llst_list) {
 237                 if (llst->llst_index == index) {
 238                         list_del_init(&llst->llst_list);
 239                         spin_unlock(&llsd->llsd_lock);
 240
 241                         return llst;
 242                 }
 243         }
 244         spin_unlock(&llsd->llsd_lock);
 245
 246         return NULL;
 247 }
 248
 249 static inline void lfsck_layout_object_put(const struct lu_env *env,
 250                                            struct lfsck_layout_object *llo)
 251 {
 252         if (atomic_dec_and_test(&llo->llo_ref)) {
 253                 lfsck_object_put(env, llo->llo_obj);
 254                 OBD_FREE_PTR(llo);
 255         }
 256 }
 257
 258 static struct lfsck_layout_req *
 259 lfsck_layout_req_init(struct lfsck_layout_object *parent,
 260                       struct dt_object *child, __u32 ost_idx, __u32 lov_idx)
 261 {
 262         struct lfsck_layout_req *llr;
 263
 264         OBD_ALLOC_PTR(llr);
 265         if (llr == NULL)
 266                 return ERR_PTR(-ENOMEM);
 267
 268         INIT_LIST_HEAD(&llr->llr_list);
 269         atomic_inc(&parent->llo_ref);
 270         llr->llr_parent = parent;
 271         llr->llr_child = child;
 272         llr->llr_ost_idx = ost_idx;
 273         llr->llr_lov_idx = lov_idx;
 274
 275         return llr;
 276 }
 277
 278 static inline void lfsck_layout_req_fini(const struct lu_env *env,
 279                                          struct lfsck_layout_req *llr)
 280 {
 281         lu_object_put(env, &llr->llr_child->do_lu);
 282         lfsck_layout_object_put(env, llr->llr_parent);
 283         OBD_FREE_PTR(llr);
 284 }
 285
 286 static inline bool lfsck_layout_req_empty(struct lfsck_layout_master_data *llmd)
 287 {
 288         bool empty = false;
 289
 290         spin_lock(&llmd->llmd_lock);
 291         if (list_empty(&llmd->llmd_req_list))
 292                 empty = true;
 293         spin_unlock(&llmd->llmd_lock);
 294
 295         return empty;
 296 }
 297
 298 static int lfsck_layout_get_lovea(const struct lu_env *env,
 299                                   struct dt_object *obj,
 300                                   struct lu_buf *buf, ssize_t *buflen)
 301 {
 302         int rc;
 303
 304 again:
 305         rc = dt_xattr_get(env, obj, buf, XATTR_NAME_LOV, BYPASS_CAPA);
 306         if (rc == -ERANGE) {
 307                 rc = dt_xattr_get(env, obj, &LU_BUF_NULL, XATTR_NAME_LOV,
 308                                   BYPASS_CAPA);
 309                 if (rc <= 0)
 310                         return rc;
 311
 312                 lu_buf_realloc(buf, rc);
 313                 if (buflen != NULL)
 314                         *buflen = buf->lb_len;
 315
 316                 if (buf->lb_buf == NULL)
 317                         return -ENOMEM;
 318
 319                 goto again;
 320         }
 321
 322         if (rc == -ENODATA)
 323                 rc = 0;
 324
 325         if (rc <= 0)
 326                 return rc;
 327
 328         if (unlikely(buf->lb_buf == NULL)) {
 329                 lu_buf_alloc(buf, rc);
 330                 if (buflen != NULL)
 331                         *buflen = buf->lb_len;
 332
 333                 if (buf->lb_buf == NULL)
 334                         return -ENOMEM;
 335
 336                 goto again;
 337         }
 338
 339         return rc;
 340 }
 341
 342 static int lfsck_layout_verify_header(struct lov_mds_md_v1 *lmm)
 343 {
 344         __u32 magic;
 345         __u32 patten;
 346
 347         magic = le32_to_cpu(lmm->lmm_magic);
 348         /* If magic crashed, keep it there. Sometime later, during OST-object
 349          * orphan handling, if some OST-object(s) back-point to it, it can be
 350          * verified and repaired. */
 351         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
 352                 return -EINVAL;
 353
 354         patten = le32_to_cpu(lmm->lmm_pattern);
 355         /* XXX: currently, we only support LOV_PATTERN_RAID0. */
 356         if (patten != LOV_PATTERN_RAID0)
 357                 return -EOPNOTSUPP;
 358
 359         return 0;
 360 }
 361
 362 #define LFSCK_RBTREE_BITMAP_SIZE        PAGE_CACHE_SIZE
 363 #define LFSCK_RBTREE_BITMAP_WIDTH       (LFSCK_RBTREE_BITMAP_SIZE << 3)
 364 #define LFSCK_RBTREE_BITMAP_MASK        (LFSCK_RBTREE_BITMAP_SIZE - 1)
 365
 366 struct lfsck_rbtree_node {
 367         struct rb_node   lrn_node;
 368         __u64            lrn_seq;
 369         __u32            lrn_first_oid;
 370         atomic_t         lrn_known_count;
 371         atomic_t         lrn_accessed_count;
 372         void            *lrn_known_bitmap;
 373         void            *lrn_accessed_bitmap;
 374 };
 375
 376 static inline int lfsck_rbtree_cmp(struct lfsck_rbtree_node *lrn,
 377                                    __u64 seq, __u32 oid)
 378 {
 379         if (seq < lrn->lrn_seq)
 380                 return -1;
 381
 382         if (seq > lrn->lrn_seq)
 383                 return 1;
 384
 385         if (oid < lrn->lrn_first_oid)
 386                 return -1;
 387
 388         if (oid >= lrn->lrn_first_oid + LFSCK_RBTREE_BITMAP_WIDTH)
 389                 return 1;
 390
 391         return 0;
 392 }
 393
 394 /* The caller should hold lock. */
 395 static struct lfsck_rbtree_node *
 396 lfsck_rbtree_search(struct lfsck_layout_slave_data *llsd,
 397                     const struct lu_fid *fid)
 398 {
 399         struct rb_node           *node = llsd->llsd_rb_root.rb_node;
 400         struct lfsck_rbtree_node *lrn;
 401         int                       rc;
 402
 403         while (node != NULL) {
 404                 lrn = rb_entry(node, struct lfsck_rbtree_node, lrn_node);
 405                 rc = lfsck_rbtree_cmp(lrn, fid_seq(fid), fid_oid(fid));
 406                 if (rc < 0)
 407                         node = node->rb_left;
 408                 else if (rc > 0)
 409                         node = node->rb_right;
 410                 else
 411                         return lrn;
 412         }
 413
 414         return NULL;
 415 }
 416
 417 static struct lfsck_rbtree_node *lfsck_rbtree_new(const struct lu_env *env,
 418                                                   const struct lu_fid *fid)
 419 {
 420         struct lfsck_rbtree_node *lrn;
 421
 422         OBD_ALLOC_PTR(lrn);
 423         if (lrn == NULL)
 424                 return ERR_PTR(-ENOMEM);
 425
 426         OBD_ALLOC(lrn->lrn_known_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 427         if (lrn->lrn_known_bitmap == NULL) {
 428                 OBD_FREE_PTR(lrn);
 429
 430                 return ERR_PTR(-ENOMEM);
 431         }
 432
 433         OBD_ALLOC(lrn->lrn_accessed_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 434         if (lrn->lrn_accessed_bitmap == NULL) {
 435                 OBD_FREE(lrn->lrn_known_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 436                 OBD_FREE_PTR(lrn);
 437
 438                 return ERR_PTR(-ENOMEM);
 439         }
 440
 441         rb_init_node(&lrn->lrn_node);
 442         lrn->lrn_seq = fid_seq(fid);
 443         lrn->lrn_first_oid = fid_oid(fid) & ~LFSCK_RBTREE_BITMAP_MASK;
 444         atomic_set(&lrn->lrn_known_count, 0);
 445         atomic_set(&lrn->lrn_accessed_count, 0);
 446
 447         return lrn;
 448 }
 449
 450 static void lfsck_rbtree_free(struct lfsck_rbtree_node *lrn)
 451 {
 452         OBD_FREE(lrn->lrn_accessed_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 453         OBD_FREE(lrn->lrn_known_bitmap, LFSCK_RBTREE_BITMAP_SIZE);
 454         OBD_FREE_PTR(lrn);
 455 }
 456
 457 /* The caller should hold lock. */
 458 static struct lfsck_rbtree_node *
 459 lfsck_rbtree_insert(struct lfsck_layout_slave_data *llsd,
 460                     struct lfsck_rbtree_node *lrn)
 461 {
 462         struct rb_node           **pos    = &(llsd->llsd_rb_root.rb_node);
 463         struct rb_node            *parent = NULL;
 464         struct lfsck_rbtree_node  *tmp;
 465         int                        rc;
 466
 467         while (*pos) {
 468                 parent = *pos;
 469                 tmp = rb_entry(*pos, struct lfsck_rbtree_node, lrn_node);
 470                 rc = lfsck_rbtree_cmp(tmp, lrn->lrn_seq, lrn->lrn_first_oid);
 471                 if (rc < 0)
 472                         pos = &((*pos)->rb_left);
 473                 else if (rc > 0)
 474                         pos = &((*pos)->rb_right);
 475                 else
 476                         return tmp;
 477         }
 478
 479         rb_link_node(&lrn->lrn_node, parent, pos);
 480         rb_insert_color(&lrn->lrn_node, &llsd->llsd_rb_root);
 481
 482         return lrn;
 483 }
 484
 485 static int lfsck_rbtree_setup(const struct lu_env *env,
 486                               struct lfsck_component *com)
 487 {
 488         struct lu_fid                   *fid    = &lfsck_env_info(env)->lti_fid;
 489         struct lfsck_instance           *lfsck  = com->lc_lfsck;
 490         struct dt_device                *dev    = lfsck->li_bottom;
 491         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
 492         struct dt_object                *obj;
 493
 494         fid->f_seq = FID_SEQ_LAYOUT_RBTREE;
 495         fid->f_oid = lfsck_dev_idx(dev);
 496         fid->f_ver = 0;
 497         obj = dt_locate(env, dev, fid);
 498         if (IS_ERR(obj))
 499                 RETURN(PTR_ERR(obj));
 500
 501         /* XXX: Generate an in-RAM object to stand for the layout rbtree.
 502          *      Scanning the layout rbtree will be via the iteration over
 503          *      the object. In the future, the rbtree may be written onto
 504          *      disk with the object.
 505          *
 506          *      Mark the object to be as exist. */
 507         obj->do_lu.lo_header->loh_attr |= LOHA_EXISTS;
 508         llsd->llsd_rb_obj = obj;
 509         llsd->llsd_rbtree_valid = 1;
 510         dev->dd_record_fid_accessed = 1;
 511
 512         return 0;
 513 }
 514
 515 static void lfsck_rbtree_cleanup(const struct lu_env *env,
 516                                  struct lfsck_component *com)
 517 {
 518         struct lfsck_instance           *lfsck = com->lc_lfsck;
 519         struct lfsck_layout_slave_data  *llsd  = com->lc_data;
 520         struct rb_node                  *node  = rb_first(&llsd->llsd_rb_root);
 521         struct rb_node                  *next;
 522         struct lfsck_rbtree_node        *lrn;
 523
 524         lfsck->li_bottom->dd_record_fid_accessed = 0;
 525         /* Invalid the rbtree, then no others will use it. */
 526         write_lock(&llsd->llsd_rb_lock);
 527         llsd->llsd_rbtree_valid = 0;
 528         write_unlock(&llsd->llsd_rb_lock);
 529
 530         while (node != NULL) {
 531                 next = rb_next(node);
 532                 lrn = rb_entry(node, struct lfsck_rbtree_node, lrn_node);
 533                 rb_erase(node, &llsd->llsd_rb_root);
 534                 lfsck_rbtree_free(lrn);
 535                 node = next;
 536         }
 537
 538         if (llsd->llsd_rb_obj != NULL) {
 539                 lu_object_put(env, &llsd->llsd_rb_obj->do_lu);
 540                 llsd->llsd_rb_obj = NULL;
 541         }
 542 }
 543
 544 static void lfsck_rbtree_update_bitmap(const struct lu_env *env,
 545                                        struct lfsck_component *com,
 546                                        const struct lu_fid *fid,
 547                                        bool accessed)
 548 {
 549         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
 550         struct lfsck_rbtree_node        *lrn;
 551         bool                             insert = false;
 552         int                              idx;
 553         int                              rc     = 0;
 554         ENTRY;
 555
 556         CDEBUG(D_LFSCK, "%s: update bitmap for "DFID"\n",
 557                lfsck_lfsck2name(com->lc_lfsck), PFID(fid));
 558
 559         if (unlikely(!fid_is_sane(fid) || fid_is_last_id(fid)))
 560                 RETURN_EXIT;
 561
 562         if (!fid_is_idif(fid) && !fid_is_norm(fid))
 563                 RETURN_EXIT;
 564
 565         read_lock(&llsd->llsd_rb_lock);
 566         if (!llsd->llsd_rbtree_valid)
 567                 GOTO(unlock, rc = 0);
 568
 569         lrn = lfsck_rbtree_search(llsd, fid);
 570         if (lrn == NULL) {
 571                 struct lfsck_rbtree_node *tmp;
 572
 573                 LASSERT(!insert);
 574
 575                 read_unlock(&llsd->llsd_rb_lock);
 576                 tmp = lfsck_rbtree_new(env, fid);
 577                 if (IS_ERR(tmp))
 578                         GOTO(out, rc = PTR_ERR(tmp));
 579
 580                 insert = true;
 581                 write_lock(&llsd->llsd_rb_lock);
 582                 if (!llsd->llsd_rbtree_valid) {
 583                         lfsck_rbtree_free(tmp);
 584                         GOTO(unlock, rc = 0);
 585                 }
 586
 587                 lrn = lfsck_rbtree_insert(llsd, tmp);
 588                 if (lrn != tmp)
 589                         lfsck_rbtree_free(tmp);
 590         }
 591
 592         idx = fid_oid(fid) & LFSCK_RBTREE_BITMAP_MASK;
 593         /* Any accessed object must be a known object. */
 594         if (!test_and_set_bit(idx, lrn->lrn_known_bitmap))
 595                 atomic_inc(&lrn->lrn_known_count);
 596         if (accessed) {
 597                 if (!test_and_set_bit(idx, lrn->lrn_accessed_bitmap))
 598                         atomic_inc(&lrn->lrn_accessed_count);
 599         }
 600
 601         GOTO(unlock, rc = 0);
 602
 603 unlock:
 604         if (insert)
 605                 write_unlock(&llsd->llsd_rb_lock);
 606         else
 607                 read_unlock(&llsd->llsd_rb_lock);
 608 out:
 609         if (rc != 0 && accessed) {
 610                 struct lfsck_layout *lo = com->lc_file_ram;
 611
 612                 CERROR("%s: Fail to update object accessed bitmap, will cause "
 613                        "incorrect LFSCK OST-object handling, so disable it to "
 614                        "cancel orphan handling for related device. rc = %d.\n",
 615                        lfsck_lfsck2name(com->lc_lfsck), rc);
 616                 lo->ll_flags |= LF_INCOMPLETE;
 617                 lfsck_rbtree_cleanup(env, com);
 618         }
 619 }
 620
 621 static void lfsck_layout_le_to_cpu(struct lfsck_layout *des,
 622                                    const struct lfsck_layout *src)
 623 {
 624         int i;
 625
 626         des->ll_magic = le32_to_cpu(src->ll_magic);
 627         des->ll_status = le32_to_cpu(src->ll_status);
 628         des->ll_flags = le32_to_cpu(src->ll_flags);
 629         des->ll_success_count = le32_to_cpu(src->ll_success_count);
 630         des->ll_run_time_phase1 = le32_to_cpu(src->ll_run_time_phase1);
 631         des->ll_run_time_phase2 = le32_to_cpu(src->ll_run_time_phase2);
 632         des->ll_time_last_complete = le64_to_cpu(src->ll_time_last_complete);
 633         des->ll_time_latest_start = le64_to_cpu(src->ll_time_latest_start);
 634         des->ll_time_last_checkpoint =
 635                                 le64_to_cpu(src->ll_time_last_checkpoint);
 636         des->ll_pos_latest_start = le64_to_cpu(src->ll_pos_latest_start);
 637         des->ll_pos_last_checkpoint = le64_to_cpu(src->ll_pos_last_checkpoint);
 638         des->ll_pos_first_inconsistent =
 639                         le64_to_cpu(src->ll_pos_first_inconsistent);
 640         des->ll_objs_checked_phase1 = le64_to_cpu(src->ll_objs_checked_phase1);
 641         des->ll_objs_failed_phase1 = le64_to_cpu(src->ll_objs_failed_phase1);
 642         des->ll_objs_checked_phase2 = le64_to_cpu(src->ll_objs_checked_phase2);
 643         des->ll_objs_failed_phase2 = le64_to_cpu(src->ll_objs_failed_phase2);
 644         for (i = 0; i < LLIT_MAX; i++)
 645                 des->ll_objs_repaired[i] =
 646                                 le64_to_cpu(src->ll_objs_repaired[i]);
 647         des->ll_objs_skipped = le64_to_cpu(src->ll_objs_skipped);
 648 }
 649
 650 static void lfsck_layout_cpu_to_le(struct lfsck_layout *des,
 651                                    const struct lfsck_layout *src)
 652 {
 653         int i;
 654
 655         des->ll_magic = cpu_to_le32(src->ll_magic);
 656         des->ll_status = cpu_to_le32(src->ll_status);
 657         des->ll_flags = cpu_to_le32(src->ll_flags);
 658         des->ll_success_count = cpu_to_le32(src->ll_success_count);
 659         des->ll_run_time_phase1 = cpu_to_le32(src->ll_run_time_phase1);
 660         des->ll_run_time_phase2 = cpu_to_le32(src->ll_run_time_phase2);
 661         des->ll_time_last_complete = cpu_to_le64(src->ll_time_last_complete);
 662         des->ll_time_latest_start = cpu_to_le64(src->ll_time_latest_start);
 663         des->ll_time_last_checkpoint =
 664                                 cpu_to_le64(src->ll_time_last_checkpoint);
 665         des->ll_pos_latest_start = cpu_to_le64(src->ll_pos_latest_start);
 666         des->ll_pos_last_checkpoint = cpu_to_le64(src->ll_pos_last_checkpoint);
 667         des->ll_pos_first_inconsistent =
 668                         cpu_to_le64(src->ll_pos_first_inconsistent);
 669         des->ll_objs_checked_phase1 = cpu_to_le64(src->ll_objs_checked_phase1);
 670         des->ll_objs_failed_phase1 = cpu_to_le64(src->ll_objs_failed_phase1);
 671         des->ll_objs_checked_phase2 = cpu_to_le64(src->ll_objs_checked_phase2);
 672         des->ll_objs_failed_phase2 = cpu_to_le64(src->ll_objs_failed_phase2);
 673         for (i = 0; i < LLIT_MAX; i++)
 674                 des->ll_objs_repaired[i] =
 675                                 cpu_to_le64(src->ll_objs_repaired[i]);
 676         des->ll_objs_skipped = cpu_to_le64(src->ll_objs_skipped);
 677 }
 678
 679 /**
 680  * \retval +ve: the lfsck_layout is broken, the caller should reset it.
 681  * \retval 0: succeed.
 682  * \retval -ve: failed cases.
 683  */
 684 static int lfsck_layout_load(const struct lu_env *env,
 685                              struct lfsck_component *com)
 686 {
 687         struct lfsck_layout             *lo     = com->lc_file_ram;
 688         const struct dt_body_operations *dbo    = com->lc_obj->do_body_ops;
 689         ssize_t                          size   = com->lc_file_size;
 690         loff_t                           pos    = 0;
 691         int                              rc;
 692
 693         rc = dbo->dbo_read(env, com->lc_obj,
 694                            lfsck_buf_get(env, com->lc_file_disk, size), &pos,
 695                            BYPASS_CAPA);
 696         if (rc == 0) {
 697                 return -ENOENT;
 698         } else if (rc < 0) {
 699                 CWARN("%s: failed to load lfsck_layout: rc = %d\n",
 700                       lfsck_lfsck2name(com->lc_lfsck), rc);
 701                 return rc;
 702         } else if (rc != size) {
 703                 CWARN("%s: crashed lfsck_layout, to be reset: rc = %d\n",
 704                       lfsck_lfsck2name(com->lc_lfsck), rc);
 705                 return 1;
 706         }
 707
 708         lfsck_layout_le_to_cpu(lo, com->lc_file_disk);
 709         if (lo->ll_magic != LFSCK_LAYOUT_MAGIC) {
 710                 CWARN("%s: invalid lfsck_layout magic %#x != %#x, "
 711                       "to be reset\n", lfsck_lfsck2name(com->lc_lfsck),
 712                       lo->ll_magic, LFSCK_LAYOUT_MAGIC);
 713                 return 1;
 714         }
 715
 716         return 0;
 717 }
 718
 719 static int lfsck_layout_store(const struct lu_env *env,
 720                               struct lfsck_component *com)
 721 {
 722         struct dt_object         *obj           = com->lc_obj;
 723         struct lfsck_instance    *lfsck         = com->lc_lfsck;
 724         struct lfsck_layout      *lo            = com->lc_file_disk;
 725         struct thandle           *handle;
 726         ssize_t                   size          = com->lc_file_size;
 727         loff_t                    pos           = 0;
 728         int                       rc;
 729         ENTRY;
 730
 731         lfsck_layout_cpu_to_le(lo, com->lc_file_ram);
 732         handle = dt_trans_create(env, lfsck->li_bottom);
 733         if (IS_ERR(handle)) {
 734                 rc = PTR_ERR(handle);
 735                 CERROR("%s: fail to create trans for storing lfsck_layout: "
 736                        "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
 737                 RETURN(rc);
 738         }
 739
 740         rc = dt_declare_record_write(env, obj, size, pos, handle);
 741         if (rc != 0) {
 742                 CERROR("%s: fail to declare trans for storing lfsck_layout(1): "
 743                        "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
 744                 GOTO(out, rc);
 745         }
 746
 747         rc = dt_trans_start_local(env, lfsck->li_bottom, handle);
 748         if (rc != 0) {
 749                 CERROR("%s: fail to start trans for storing lfsck_layout: "
 750                        "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
 751                 GOTO(out, rc);
 752         }
 753
 754         rc = dt_record_write(env, obj, lfsck_buf_get(env, lo, size), &pos,
 755                              handle);
 756         if (rc != 0)
 757                 CERROR("%s: fail to store lfsck_layout(1): size = %d, "
 758                        "rc = %d\n", lfsck_lfsck2name(lfsck), (int)size, rc);
 759
 760         GOTO(out, rc);
 761
 762 out:
 763         dt_trans_stop(env, lfsck->li_bottom, handle);
 764
 765         return rc;
 766 }
 767
 768 static int lfsck_layout_init(const struct lu_env *env,
 769                              struct lfsck_component *com)
 770 {
 771         struct lfsck_layout *lo = com->lc_file_ram;
 772         int rc;
 773
 774         memset(lo, 0, com->lc_file_size);
 775         lo->ll_magic = LFSCK_LAYOUT_MAGIC;
 776         lo->ll_status = LS_INIT;
 777         down_write(&com->lc_sem);
 778         rc = lfsck_layout_store(env, com);
 779         up_write(&com->lc_sem);
 780
 781         return rc;
 782 }
 783
 784 static int fid_is_for_ostobj(const struct lu_env *env, struct dt_device *dt,
 785                              struct dt_object *obj, const struct lu_fid *fid)
 786 {
 787         struct seq_server_site  *ss     = lu_site2seq(dt->dd_lu_dev.ld_site);
 788         struct lu_seq_range      range  = { 0 };
 789         struct lustre_mdt_attrs *lma;
 790         int                      rc;
 791
 792         fld_range_set_any(&range);
 793         rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(fid), &range);
 794         if (rc == 0) {
 795                 if (fld_range_is_ost(&range))
 796                         return 1;
 797
 798                 return 0;
 799         }
 800
 801         lma = &lfsck_env_info(env)->lti_lma;
 802         rc = dt_xattr_get(env, obj, lfsck_buf_get(env, lma, sizeof(*lma)),
 803                           XATTR_NAME_LMA, BYPASS_CAPA);
 804         if (rc == sizeof(*lma)) {
 805                 lustre_lma_swab(lma);
 806
 807                 return lma->lma_compat & LMAC_FID_ON_OST ? 1 : 0;
 808         }
 809
 810         rc = dt_xattr_get(env, obj, &LU_BUF_NULL, XATTR_NAME_FID, BYPASS_CAPA);
 811
 812         return rc > 0;
 813 }
 814
 815 static struct lfsck_layout_seq *
 816 lfsck_layout_seq_lookup(struct lfsck_layout_slave_data *llsd, __u64 seq)
 817 {
 818         struct lfsck_layout_seq *lls;
 819
 820         list_for_each_entry(lls, &llsd->llsd_seq_list, lls_list) {
 821                 if (lls->lls_seq == seq)
 822                         return lls;
 823
 824                 if (lls->lls_seq > seq)
 825                         return NULL;
 826         }
 827
 828         return NULL;
 829 }
 830
 831 static void
 832 lfsck_layout_seq_insert(struct lfsck_layout_slave_data *llsd,
 833                         struct lfsck_layout_seq *lls)
 834 {
 835         struct lfsck_layout_seq *tmp;
 836         struct list_head        *pos = &llsd->llsd_seq_list;
 837
 838         list_for_each_entry(tmp, &llsd->llsd_seq_list, lls_list) {
 839                 if (lls->lls_seq < tmp->lls_seq) {
 840                         pos = &tmp->lls_list;
 841                         break;
 842                 }
 843         }
 844         list_add_tail(&lls->lls_list, pos);
 845 }
 846
 847 static int
 848 lfsck_layout_lastid_create(const struct lu_env *env,
 849                            struct lfsck_instance *lfsck,
 850                            struct dt_object *obj)
 851 {
 852         struct lfsck_thread_info *info   = lfsck_env_info(env);
 853         struct lu_attr           *la     = &info->lti_la;
 854         struct dt_object_format  *dof    = &info->lti_dof;
 855         struct lfsck_bookmark    *bk     = &lfsck->li_bookmark_ram;
 856         struct dt_device         *dt     = lfsck->li_bottom;
 857         struct thandle           *th;
 858         __u64                     lastid = 0;
 859         loff_t                    pos    = 0;
 860         int                       rc;
 861         ENTRY;
 862
 863         CDEBUG(D_LFSCK, "To create LAST_ID for <seq> "LPX64"\n",
 864                fid_seq(lfsck_dto2fid(obj)));
 865
 866         if (bk->lb_param & LPF_DRYRUN)
 867                 return 0;
 868
 869         memset(la, 0, sizeof(*la));
 870         la->la_mode = S_IFREG |  S_IRUGO | S_IWUSR;
 871         la->la_valid = LA_MODE | LA_UID | LA_GID;
 872         dof->dof_type = dt_mode_to_dft(S_IFREG);
 873
 874         th = dt_trans_create(env, dt);
 875         if (IS_ERR(th))
 876                 RETURN(rc = PTR_ERR(th));
 877
 878         rc = dt_declare_create(env, obj, la, NULL, dof, th);
 879         if (rc != 0)
 880                 GOTO(stop, rc);
 881
 882         rc = dt_declare_record_write(env, obj, sizeof(lastid), pos, th);
 883         if (rc != 0)
 884                 GOTO(stop, rc);
 885
 886         rc = dt_trans_start_local(env, dt, th);
 887         if (rc != 0)
 888                 GOTO(stop, rc);
 889
 890         dt_write_lock(env, obj, 0);
 891         if (likely(!dt_object_exists(obj))) {
 892                 rc = dt_create(env, obj, la, NULL, dof, th);
 893                 if (rc == 0)
 894                         rc = dt_record_write(env, obj,
 895                                 lfsck_buf_get(env, &lastid, sizeof(lastid)),
 896                                 &pos, th);
 897         }
 898         dt_write_unlock(env, obj);
 899
 900         GOTO(stop, rc);
 901
 902 stop:
 903         dt_trans_stop(env, dt, th);
 904
 905         return rc;
 906 }
 907
 908 static int
 909 lfsck_layout_lastid_reload(const struct lu_env *env,
 910                            struct lfsck_component *com,
 911                            struct lfsck_layout_seq *lls)
 912 {
 913         __u64   lastid;
 914         loff_t  pos     = 0;
 915         int     rc;
 916
 917         dt_read_lock(env, lls->lls_lastid_obj, 0);
 918         rc = dt_record_read(env, lls->lls_lastid_obj,
 919                             lfsck_buf_get(env, &lastid, sizeof(lastid)), &pos);
 920         dt_read_unlock(env, lls->lls_lastid_obj);
 921         if (unlikely(rc != 0))
 922                 return rc;
 923
 924         lastid = le64_to_cpu(lastid);
 925         if (lastid < lls->lls_lastid_known) {
 926                 struct lfsck_instance   *lfsck  = com->lc_lfsck;
 927                 struct lfsck_layout     *lo     = com->lc_file_ram;
 928
 929                 lls->lls_lastid = lls->lls_lastid_known;
 930                 lls->lls_dirty = 1;
 931                 if (!(lo->ll_flags & LF_CRASHED_LASTID)) {
 932                         LASSERT(lfsck->li_out_notify != NULL);
 933
 934                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
 935                                              LE_LASTID_REBUILDING);
 936                         lo->ll_flags |= LF_CRASHED_LASTID;
 937                 }
 938         } else if (lastid >= lls->lls_lastid) {
 939                 lls->lls_lastid = lastid;
 940                 lls->lls_dirty = 0;
 941         }
 942
 943         return 0;
 944 }
 945
 946 static int
 947 lfsck_layout_lastid_store(const struct lu_env *env,
 948                           struct lfsck_component *com)
 949 {
 950         struct lfsck_instance           *lfsck  = com->lc_lfsck;
 951         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
 952         struct dt_device                *dt     = lfsck->li_bottom;
 953         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
 954         struct lfsck_layout_seq         *lls;
 955         struct thandle                  *th;
 956         __u64                            lastid;
 957         int                              rc     = 0;
 958         int                              rc1    = 0;
 959
 960         list_for_each_entry(lls, &llsd->llsd_seq_list, lls_list) {
 961                 loff_t pos = 0;
 962
 963                 /* XXX: Add the code back if we really found related
 964                  *      inconsistent cases in the future. */
 965 #if 0
 966                 if (!lls->lls_dirty) {
 967                         /* In OFD, before the pre-creation, the LAST_ID
 968                          * file will be updated firstly, which may hide
 969                          * some potential crashed cases. For example:
 970                          *
 971                          * The old obj1's ID is higher than old LAST_ID
 972                          * but lower than the new LAST_ID, but the LFSCK
 973                          * have not touch the obj1 until the OFD updated
 974                          * the LAST_ID. So the LFSCK does not regard it
 975                          * as crashed case. But when OFD does not create
 976                          * successfully, it will set the LAST_ID as the
 977                          * real created objects' ID, then LFSCK needs to
 978                          * found related inconsistency. */
 979                         rc = lfsck_layout_lastid_reload(env, com, lls);
 980                         if (likely(!lls->lls_dirty))
 981                                 continue;
 982                 }
 983 #endif
 984
 985                 CDEBUG(D_LFSCK, "To sync the LAST_ID for <seq> "LPX64
 986                        " as <oid> "LPU64"\n", lls->lls_seq, lls->lls_lastid);
 987
 988                 if (bk->lb_param & LPF_DRYRUN) {
 989                         lls->lls_dirty = 0;
 990                         continue;
 991                 }
 992
 993                 th = dt_trans_create(env, dt);
 994                 if (IS_ERR(th)) {
 995                         rc1 = PTR_ERR(th);
 996                         CERROR("%s: (1) failed to store "LPX64": rc = %d\n",
 997                                lfsck_lfsck2name(com->lc_lfsck),
 998                                lls->lls_seq, rc1);
 999                         continue;
1000                 }
1001
1002                 rc = dt_declare_record_write(env, lls->lls_lastid_obj,
1003                                              sizeof(lastid), pos, th);
1004                 if (rc != 0)
1005                         goto stop;
1006
1007                 rc = dt_trans_start_local(env, dt, th);
1008                 if (rc != 0)
1009                         goto stop;
1010
1011                 lastid = cpu_to_le64(lls->lls_lastid);
1012                 dt_write_lock(env, lls->lls_lastid_obj, 0);
1013                 rc = dt_record_write(env, lls->lls_lastid_obj,
1014                                      lfsck_buf_get(env, &lastid,
1015                                      sizeof(lastid)), &pos, th);
1016                 dt_write_unlock(env, lls->lls_lastid_obj);
1017                 if (rc == 0)
1018                         lls->lls_dirty = 0;
1019
1020 stop:
1021                 dt_trans_stop(env, dt, th);
1022                 if (rc != 0) {
1023                         rc1 = rc;
1024                         CERROR("%s: (2) failed to store "LPX64": rc = %d\n",
1025                                lfsck_lfsck2name(com->lc_lfsck),
1026                                lls->lls_seq, rc1);
1027                 }
1028         }
1029
1030         return rc1;
1031 }
1032
1033 static int
1034 lfsck_layout_lastid_load(const struct lu_env *env,
1035                          struct lfsck_component *com,
1036                          struct lfsck_layout_seq *lls)
1037 {
1038         struct lfsck_instance   *lfsck  = com->lc_lfsck;
1039         struct lfsck_layout     *lo     = com->lc_file_ram;
1040         struct lu_fid           *fid    = &lfsck_env_info(env)->lti_fid;
1041         struct dt_object        *obj;
1042         loff_t                   pos    = 0;
1043         int                      rc;
1044         ENTRY;
1045
1046         lu_last_id_fid(fid, lls->lls_seq, lfsck_dev_idx(lfsck->li_bottom));
1047         obj = dt_locate(env, lfsck->li_bottom, fid);
1048         if (IS_ERR(obj))
1049                 RETURN(PTR_ERR(obj));
1050
1051         /* LAST_ID crashed, to be rebuilt */
1052         if (!dt_object_exists(obj)) {
1053                 if (!(lo->ll_flags & LF_CRASHED_LASTID)) {
1054                         LASSERT(lfsck->li_out_notify != NULL);
1055
1056                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
1057                                              LE_LASTID_REBUILDING);
1058                         lo->ll_flags |= LF_CRASHED_LASTID;
1059
1060                         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY4) &&
1061                             cfs_fail_val > 0) {
1062                                 struct l_wait_info lwi = LWI_TIMEOUT(
1063                                                 cfs_time_seconds(cfs_fail_val),
1064                                                 NULL, NULL);
1065
1066                                 up_write(&com->lc_sem);
1067                                 l_wait_event(lfsck->li_thread.t_ctl_waitq,
1068                                              !thread_is_running(&lfsck->li_thread),
1069                                              &lwi);
1070                                 down_write(&com->lc_sem);
1071                         }
1072                 }
1073
1074                 rc = lfsck_layout_lastid_create(env, lfsck, obj);
1075         } else {
1076                 dt_read_lock(env, obj, 0);
1077                 rc = dt_read(env, obj,
1078                         lfsck_buf_get(env, &lls->lls_lastid, sizeof(__u64)),
1079                         &pos);
1080                 dt_read_unlock(env, obj);
1081                 if (rc != 0 && rc != sizeof(__u64))
1082                         GOTO(out, rc = (rc > 0 ? -EFAULT : rc));
1083
1084                 if (rc == 0 && !(lo->ll_flags & LF_CRASHED_LASTID)) {
1085                         LASSERT(lfsck->li_out_notify != NULL);
1086
1087                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
1088                                              LE_LASTID_REBUILDING);
1089                         lo->ll_flags |= LF_CRASHED_LASTID;
1090                 }
1091
1092                 lls->lls_lastid = le64_to_cpu(lls->lls_lastid);
1093                 rc = 0;
1094         }
1095
1096         GOTO(out, rc);
1097
1098 out:
1099         if (rc != 0)
1100                 lfsck_object_put(env, obj);
1101         else
1102                 lls->lls_lastid_obj = obj;
1103
1104         return rc;
1105 }
1106
1107 static int lfsck_layout_master_async_interpret(const struct lu_env *env,
1108                                                struct ptlrpc_request *req,
1109                                                void *args, int rc)
1110 {
1111         struct lfsck_async_interpret_args *laia = args;
1112         struct lfsck_component            *com  = laia->laia_com;
1113         struct lfsck_layout_master_data   *llmd = com->lc_data;
1114         struct lfsck_tgt_descs            *ltds = laia->laia_ltds;
1115         struct lfsck_tgt_desc             *ltd  = laia->laia_ltd;
1116         struct lfsck_request              *lr   = laia->laia_lr;
1117
1118         switch (lr->lr_event) {
1119         case LE_START:
1120                 if (rc != 0) {
1121                         struct lfsck_layout *lo = com->lc_file_ram;
1122
1123                         lo->ll_flags |= LF_INCOMPLETE;
1124                         lfsck_tgt_put(ltd);
1125                         break;
1126                 }
1127
1128                 spin_lock(&ltds->ltd_lock);
1129                 if (ltd->ltd_dead || ltd->ltd_layout_done) {
1130                         spin_unlock(&ltds->ltd_lock);
1131                         lfsck_tgt_put(ltd);
1132                         break;
1133                 }
1134
1135                 if (lr->lr_flags & LEF_TO_OST) {
1136                         if (list_empty(&ltd->ltd_layout_list))
1137                                 list_add_tail(&ltd->ltd_layout_list,
1138                                               &llmd->llmd_ost_list);
1139                         if (list_empty(&ltd->ltd_layout_phase_list))
1140                                 list_add_tail(&ltd->ltd_layout_phase_list,
1141                                               &llmd->llmd_ost_phase1_list);
1142                 } else {
1143                         if (list_empty(&ltd->ltd_layout_list))
1144                                 list_add_tail(&ltd->ltd_layout_list,
1145                                               &llmd->llmd_mdt_list);
1146                         if (list_empty(&ltd->ltd_layout_phase_list))
1147                                 list_add_tail(&ltd->ltd_layout_phase_list,
1148                                               &llmd->llmd_mdt_phase1_list);
1149                 }
1150                 spin_unlock(&ltds->ltd_lock);
1151                 lfsck_tgt_put(ltd);
1152                 break;
1153         case LE_STOP:
1154         case LE_PHASE1_DONE:
1155         case LE_PHASE2_DONE:
1156                 if (rc != 0)
1157                         CERROR("%s: fail to notify %s %x for layout: "
1158                                "event = %d, rc = %d\n",
1159                                lfsck_lfsck2name(com->lc_lfsck),
1160                                (lr->lr_flags & LEF_TO_OST) ? "OST" : "MDT",
1161                                ltd->ltd_index, lr->lr_event, rc);
1162                 break;
1163         case LE_QUERY: {
1164                 struct lfsck_reply *reply;
1165
1166                 if (rc != 0) {
1167                         spin_lock(&ltds->ltd_lock);
1168                         list_del_init(&ltd->ltd_layout_phase_list);
1169                         list_del_init(&ltd->ltd_layout_list);
1170                         spin_unlock(&ltds->ltd_lock);
1171                         lfsck_tgt_put(ltd);
1172                         break;
1173                 }
1174
1175                 reply = req_capsule_server_get(&req->rq_pill,
1176                                                &RMF_LFSCK_REPLY);
1177                 if (reply == NULL) {
1178                         rc = -EPROTO;
1179                         CERROR("%s: invalid return value: rc = %d\n",
1180                                lfsck_lfsck2name(com->lc_lfsck), rc);
1181                         spin_lock(&ltds->ltd_lock);
1182                         list_del_init(&ltd->ltd_layout_phase_list);
1183                         list_del_init(&ltd->ltd_layout_list);
1184                         spin_unlock(&ltds->ltd_lock);
1185                         lfsck_tgt_put(ltd);
1186                         break;
1187                 }
1188
1189                 switch (reply->lr_status) {
1190                 case LS_SCANNING_PHASE1:
1191                         break;
1192                 case LS_SCANNING_PHASE2:
1193                         spin_lock(&ltds->ltd_lock);
1194                         list_del_init(&ltd->ltd_layout_phase_list);
1195                         if (ltd->ltd_dead || ltd->ltd_layout_done) {
1196                                 spin_unlock(&ltds->ltd_lock);
1197                                 break;
1198                         }
1199
1200                         if (lr->lr_flags & LEF_TO_OST)
1201                                 list_add_tail(&ltd->ltd_layout_phase_list,
1202                                               &llmd->llmd_ost_phase2_list);
1203                         else
1204                                 list_add_tail(&ltd->ltd_layout_phase_list,
1205                                               &llmd->llmd_mdt_phase2_list);
1206                         spin_unlock(&ltds->ltd_lock);
1207                         break;
1208                 default:
1209                         spin_lock(&ltds->ltd_lock);
1210                         list_del_init(&ltd->ltd_layout_phase_list);
1211                         list_del_init(&ltd->ltd_layout_list);
1212                         spin_unlock(&ltds->ltd_lock);
1213                         break;
1214                 }
1215                 lfsck_tgt_put(ltd);
1216                 break;
1217         }
1218         default:
1219                 CERROR("%s: unexpected event: rc = %d\n",
1220                        lfsck_lfsck2name(com->lc_lfsck), lr->lr_event);
1221                 break;
1222         }
1223
1224         lfsck_component_put(env, com);
1225
1226         return 0;
1227 }
1228
1229 static int lfsck_layout_master_query_others(const struct lu_env *env,
1230                                             struct lfsck_component *com)
1231 {
1232         struct lfsck_thread_info          *info  = lfsck_env_info(env);
1233         struct lfsck_request              *lr    = &info->lti_lr;
1234         struct lfsck_async_interpret_args *laia  = &info->lti_laia;
1235         struct lfsck_instance             *lfsck = com->lc_lfsck;
1236         struct lfsck_layout_master_data   *llmd  = com->lc_data;
1237         struct ptlrpc_request_set         *set;
1238         struct lfsck_tgt_descs            *ltds;
1239         struct lfsck_tgt_desc             *ltd;
1240         struct list_head                  *head;
1241         __u32                              cnt   = 0;
1242         int                                rc    = 0;
1243         int                                rc1   = 0;
1244         ENTRY;
1245
1246         set = ptlrpc_prep_set();
1247         if (set == NULL)
1248                 RETURN(-ENOMEM);
1249
1250         llmd->llmd_touch_gen++;
1251         memset(lr, 0, sizeof(*lr));
1252         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
1253         lr->lr_event = LE_QUERY;
1254         lr->lr_active = LT_LAYOUT;
1255         laia->laia_com = com;
1256         laia->laia_lr = lr;
1257
1258         if (!list_empty(&llmd->llmd_mdt_phase1_list)) {
1259                 ltds = &lfsck->li_mdt_descs;
1260                 lr->lr_flags = 0;
1261                 head = &llmd->llmd_mdt_phase1_list;
1262         } else {
1263
1264 again:
1265                 ltds = &lfsck->li_ost_descs;
1266                 lr->lr_flags = LEF_TO_OST;
1267                 head = &llmd->llmd_ost_phase1_list;
1268         }
1269
1270         laia->laia_ltds = ltds;
1271         spin_lock(&ltds->ltd_lock);
1272         while (!list_empty(head)) {
1273                 ltd = list_entry(head->next,
1274                                  struct lfsck_tgt_desc,
1275                                  ltd_layout_phase_list);
1276                 if (ltd->ltd_layout_gen == llmd->llmd_touch_gen)
1277                         break;
1278
1279                 ltd->ltd_layout_gen = llmd->llmd_touch_gen;
1280                 list_del(&ltd->ltd_layout_phase_list);
1281                 list_add_tail(&ltd->ltd_layout_phase_list, head);
1282                 atomic_inc(&ltd->ltd_ref);
1283                 laia->laia_ltd = ltd;
1284                 spin_unlock(&ltds->ltd_lock);
1285                 rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
1286                                          lfsck_layout_master_async_interpret,
1287                                          laia, LFSCK_QUERY);
1288                 if (rc != 0) {
1289                         CERROR("%s: fail to query %s %x for layout: rc = %d\n",
1290                                lfsck_lfsck2name(lfsck),
1291                                (lr->lr_flags & LEF_TO_OST) ? "OST" : "MDT",
1292                                ltd->ltd_index, rc);
1293                         lfsck_tgt_put(ltd);
1294                         rc1 = rc;
1295                 } else {
1296                         cnt++;
1297                 }
1298                 spin_lock(&ltds->ltd_lock);
1299         }
1300         spin_unlock(&ltds->ltd_lock);
1301
1302         if (cnt > 0) {
1303                 rc = ptlrpc_set_wait(set);
1304                 if (rc < 0) {
1305                         ptlrpc_set_destroy(set);
1306                         RETURN(rc);
1307                 }
1308                 cnt = 0;
1309         }
1310
1311         if (!(lr->lr_flags & LEF_TO_OST) &&
1312             list_empty(&llmd->llmd_mdt_phase1_list))
1313                 goto again;
1314
1315         ptlrpc_set_destroy(set);
1316
1317         RETURN(rc1 != 0 ? rc1 : rc);
1318 }
1319
1320 static inline bool
1321 lfsck_layout_master_to_orphan(struct lfsck_layout_master_data *llmd)
1322 {
1323         return list_empty(&llmd->llmd_mdt_phase1_list) &&
1324                (!list_empty(&llmd->llmd_ost_phase2_list) ||
1325                 list_empty(&llmd->llmd_ost_phase1_list));
1326 }
1327
1328 static int lfsck_layout_master_notify_others(const struct lu_env *env,
1329                                              struct lfsck_component *com,
1330                                              struct lfsck_request *lr,
1331                                              __u32 flags)
1332 {
1333         struct lfsck_thread_info          *info  = lfsck_env_info(env);
1334         struct lfsck_async_interpret_args *laia  = &info->lti_laia;
1335         struct lfsck_instance             *lfsck = com->lc_lfsck;
1336         struct lfsck_layout_master_data   *llmd  = com->lc_data;
1337         struct lfsck_layout               *lo    = com->lc_file_ram;
1338         struct ptlrpc_request_set         *set;
1339         struct lfsck_tgt_descs            *ltds;
1340         struct lfsck_tgt_desc             *ltd;
1341         struct lfsck_tgt_desc             *next;
1342         struct list_head                  *head;
1343         __u32                              idx;
1344         __u32                              cnt   = 0;
1345         int                                rc    = 0;
1346         ENTRY;
1347
1348         set = ptlrpc_prep_set();
1349         if (set == NULL)
1350                 RETURN(-ENOMEM);
1351
1352         lr->lr_active = LT_LAYOUT;
1353         laia->laia_com = com;
1354         laia->laia_lr = lr;
1355         lr->lr_flags = 0;
1356         switch (lr->lr_event) {
1357         case LE_START:
1358                 /* Notify OSTs firstly, then other MDTs if needed. */
1359                 lr->lr_flags |= LEF_TO_OST;
1360                 ltds = &lfsck->li_ost_descs;
1361
1362 lable1:
1363                 laia->laia_ltds = ltds;
1364                 down_read(&ltds->ltd_rw_sem);
1365                 cfs_foreach_bit(ltds->ltd_tgts_bitmap, idx) {
1366                         ltd = lfsck_tgt_get(ltds, idx);
1367                         LASSERT(ltd != NULL);
1368
1369                         laia->laia_ltd = ltd;
1370                         ltd->ltd_layout_done = 0;
1371                         rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
1372                                         lfsck_layout_master_async_interpret,
1373                                         laia, LFSCK_NOTIFY);
1374                         if (rc != 0) {
1375                                 CERROR("%s: fail to notify %s %x for layout "
1376                                        "start: rc = %d\n",
1377                                        lfsck_lfsck2name(lfsck),
1378                                        (lr->lr_flags & LEF_TO_OST) ? "OST" :
1379                                        "MDT", idx, rc);
1380                                 lfsck_tgt_put(ltd);
1381                                 lo->ll_flags |= LF_INCOMPLETE;
1382                         } else {
1383                                 cnt++;
1384                         }
1385                 }
1386                 up_read(&ltds->ltd_rw_sem);
1387
1388                 /* Sync up */
1389                 if (cnt > 0) {
1390                         rc = ptlrpc_set_wait(set);
1391                         if (rc < 0) {
1392                                 ptlrpc_set_destroy(set);
1393                                 RETURN(rc);
1394                         }
1395                         cnt = 0;
1396                 }
1397
1398                 if (!(flags & LPF_ALL_MDT))
1399                         break;
1400
1401                 ltds = &lfsck->li_mdt_descs;
1402                 /* The sponsor broadcasts the request to other MDTs. */
1403                 if (flags & LPF_BROADCAST) {
1404                         flags &= ~LPF_ALL_MDT;
1405                         lr->lr_flags &= ~LEF_TO_OST;
1406                         goto lable1;
1407                 }
1408
1409                 /* non-sponsors link other MDT targets locallly. */
1410                 spin_lock(&ltds->ltd_lock);
1411                 cfs_foreach_bit(ltds->ltd_tgts_bitmap, idx) {
1412                         ltd = LTD_TGT(ltds, idx);
1413                         LASSERT(ltd != NULL);
1414
1415                         if (!list_empty(&ltd->ltd_layout_list))
1416                                 continue;
1417
1418                         list_add_tail(&ltd->ltd_layout_list,
1419                                       &llmd->llmd_mdt_list);
1420                         list_add_tail(&ltd->ltd_layout_phase_list,
1421                                       &llmd->llmd_mdt_phase1_list);
1422                 }
1423                 spin_unlock(&ltds->ltd_lock);
1424
1425                 break;
1426         case LE_STOP:
1427                 if (flags & LPF_BROADCAST)
1428                         lr->lr_flags |= LEF_FORCE_STOP;
1429         case LE_PHASE2_DONE:
1430                 /* Notify other MDTs if needed, then the OSTs. */
1431                 if (flags & LPF_ALL_MDT) {
1432                         /* The sponsor broadcasts the request to other MDTs. */
1433                         if (flags & LPF_BROADCAST) {
1434                                 lr->lr_flags &= ~LEF_TO_OST;
1435                                 head = &llmd->llmd_mdt_list;
1436                                 ltds = &lfsck->li_mdt_descs;
1437                                 goto lable3;
1438                         }
1439
1440                         /* non-sponsors unlink other MDT targets locallly. */
1441                         ltds = &lfsck->li_mdt_descs;
1442                         spin_lock(&ltds->ltd_lock);
1443                         list_for_each_entry_safe(ltd, next,
1444                                                  &llmd->llmd_mdt_list,
1445                                                  ltd_layout_list) {
1446                                 list_del_init(&ltd->ltd_layout_phase_list);
1447                                 list_del_init(&ltd->ltd_layout_list);
1448                         }
1449                         spin_unlock(&ltds->ltd_lock);
1450                 }
1451
1452 lable2:
1453                 lr->lr_flags |= LEF_TO_OST;
1454                 head = &llmd->llmd_ost_list;
1455                 ltds = &lfsck->li_ost_descs;
1456
1457 lable3:
1458                 laia->laia_ltds = ltds;
1459                 spin_lock(&ltds->ltd_lock);
1460                 while (!list_empty(head)) {
1461                         ltd = list_entry(head->next, struct lfsck_tgt_desc,
1462                                          ltd_layout_list);
1463                         if (!list_empty(&ltd->ltd_layout_phase_list))
1464                                 list_del_init(&ltd->ltd_layout_phase_list);
1465                         list_del_init(&ltd->ltd_layout_list);
1466                         laia->laia_ltd = ltd;
1467                         spin_unlock(&ltds->ltd_lock);
1468                         rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
1469                                         lfsck_layout_master_async_interpret,
1470                                         laia, LFSCK_NOTIFY);
1471                         if (rc != 0)
1472                                 CERROR("%s: fail to notify %s %x for layout "
1473                                        "stop/phase2: rc = %d\n",
1474                                        lfsck_lfsck2name(lfsck),
1475                                        (lr->lr_flags & LEF_TO_OST) ? "OST" :
1476                                        "MDT", ltd->ltd_index, rc);
1477                         else
1478                                 cnt++;
1479                         spin_lock(&ltds->ltd_lock);
1480                 }
1481                 spin_unlock(&ltds->ltd_lock);
1482
1483                 if (!(flags & LPF_BROADCAST))
1484                         break;
1485
1486                 /* Sync up */
1487                 if (cnt > 0) {
1488                         rc = ptlrpc_set_wait(set);
1489                         if (rc < 0) {
1490                                 ptlrpc_set_destroy(set);
1491                                 RETURN(rc);
1492                         }
1493                         cnt = 0;
1494                 }
1495
1496                 flags &= ~LPF_BROADCAST;
1497                 goto lable2;
1498         case LE_PHASE1_DONE:
1499                 llmd->llmd_touch_gen++;
1500                 lr->lr_flags &= ~LEF_TO_OST;
1501                 ltds = &lfsck->li_mdt_descs;
1502                 laia->laia_ltds = ltds;
1503                 spin_lock(&ltds->ltd_lock);
1504                 while (!list_empty(&llmd->llmd_mdt_phase1_list)) {
1505                         ltd = list_entry(llmd->llmd_mdt_phase1_list.next,
1506                                          struct lfsck_tgt_desc,
1507                                          ltd_layout_phase_list);
1508                         if (ltd->ltd_layout_gen == llmd->llmd_touch_gen)
1509                                 break;
1510
1511                         ltd->ltd_layout_gen = llmd->llmd_touch_gen;
1512                         list_del_init(&ltd->ltd_layout_phase_list);
1513                         list_add_tail(&ltd->ltd_layout_phase_list,
1514                                       &llmd->llmd_mdt_phase1_list);
1515                         laia->laia_ltd = ltd;
1516                         spin_unlock(&ltds->ltd_lock);
1517                         rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
1518                                         lfsck_layout_master_async_interpret,
1519                                         laia, LFSCK_NOTIFY);
1520                         if (rc != 0)
1521                                 CERROR("%s: fail to notify MDT %x for layout "
1522                                        "phase1 done: rc = %d\n",
1523                                        lfsck_lfsck2name(lfsck),
1524                                        ltd->ltd_index, rc);
1525                         else
1526                                 cnt++;
1527                         spin_lock(&ltds->ltd_lock);
1528                 }
1529                 spin_unlock(&ltds->ltd_lock);
1530                 break;
1531         default:
1532                 CERROR("%s: unexpected LFSCK event: rc = %d\n",
1533                        lfsck_lfsck2name(lfsck), lr->lr_event);
1534                 rc = -EINVAL;
1535                 break;
1536         }
1537
1538         if (cnt > 0)
1539                 rc = ptlrpc_set_wait(set);
1540         ptlrpc_set_destroy(set);
1541
1542         if (rc == 0 && lr->lr_event == LE_START &&
1543             list_empty(&llmd->llmd_ost_list))
1544                 rc = -ENODEV;
1545
1546         RETURN(rc);
1547 }
1548
1549 static int lfsck_layout_double_scan_result(const struct lu_env *env,
1550                                            struct lfsck_component *com,
1551                                            int rc)
1552 {
1553         struct lfsck_instance   *lfsck = com->lc_lfsck;
1554         struct lfsck_layout     *lo    = com->lc_file_ram;
1555         struct lfsck_bookmark   *bk    = &lfsck->li_bookmark_ram;
1556
1557         down_write(&com->lc_sem);
1558
1559         lo->ll_run_time_phase2 += cfs_duration_sec(cfs_time_current() +
1560                                 HALF_SEC - lfsck->li_time_last_checkpoint);
1561         lo->ll_time_last_checkpoint = cfs_time_current_sec();
1562         lo->ll_objs_checked_phase2 += com->lc_new_checked;
1563
1564         if (rc > 0) {
1565                 com->lc_journal = 0;
1566                 if (lo->ll_flags & LF_INCOMPLETE)
1567                         lo->ll_status = LS_PARTIAL;
1568                 else
1569                         lo->ll_status = LS_COMPLETED;
1570                 if (!(bk->lb_param & LPF_DRYRUN))
1571                         lo->ll_flags &= ~(LF_SCANNED_ONCE | LF_INCONSISTENT);
1572                 lo->ll_time_last_complete = lo->ll_time_last_checkpoint;
1573                 lo->ll_success_count++;
1574         } else if (rc == 0) {
1575                 lo->ll_status = lfsck->li_status;
1576                 if (lo->ll_status == 0)
1577                         lo->ll_status = LS_STOPPED;
1578         } else {
1579                 lo->ll_status = LS_FAILED;
1580         }
1581
1582         if (lo->ll_status != LS_PAUSED) {
1583                 spin_lock(&lfsck->li_lock);
1584                 list_del_init(&com->lc_link);
1585                 list_add_tail(&com->lc_link, &lfsck->li_list_idle);
1586                 spin_unlock(&lfsck->li_lock);
1587         }
1588
1589         rc = lfsck_layout_store(env, com);
1590
1591         up_write(&com->lc_sem);
1592
1593         return rc;
1594 }
1595
1596 static int lfsck_layout_lock(const struct lu_env *env,
1597                              struct lfsck_component *com,
1598                              struct dt_object *obj,
1599                              struct lustre_handle *lh, __u64 bits)
1600 {
1601         struct lfsck_thread_info        *info   = lfsck_env_info(env);
1602         ldlm_policy_data_t              *policy = &info->lti_policy;
1603         struct ldlm_res_id              *resid  = &info->lti_resid;
1604         struct lfsck_instance           *lfsck  = com->lc_lfsck;
1605         __u64                            flags  = LDLM_FL_ATOMIC_CB;
1606         int                              rc;
1607
1608         LASSERT(lfsck->li_namespace != NULL);
1609
1610         memset(policy, 0, sizeof(*policy));
1611         policy->l_inodebits.bits = bits;
1612         fid_build_reg_res_name(lfsck_dto2fid(obj), resid);
1613         rc = ldlm_cli_enqueue_local(lfsck->li_namespace, resid, LDLM_IBITS,
1614                                     policy, LCK_EX, &flags, ldlm_blocking_ast,
1615                                     ldlm_completion_ast, NULL, NULL, 0,
1616                                     LVB_T_NONE, NULL, lh);
1617         if (rc == ELDLM_OK) {
1618                 rc = 0;
1619         } else {
1620                 memset(lh, 0, sizeof(*lh));
1621                 rc = -EIO;
1622         }
1623
1624         return rc;
1625 }
1626
1627 static void lfsck_layout_unlock(struct lustre_handle *lh)
1628 {
1629         if (lustre_handle_is_used(lh)) {
1630                 ldlm_lock_decref(lh, LCK_EX);
1631                 memset(lh, 0, sizeof(*lh));
1632         }
1633 }
1634
1635 static int lfsck_layout_trans_stop(const struct lu_env *env,
1636                                    struct dt_device *dev,
1637                                    struct thandle *handle, int result)
1638 {
1639         int rc;
1640
1641         handle->th_result = result;
1642         rc = dt_trans_stop(env, dev, handle);
1643         if (rc > 0)
1644                 rc = 0;
1645         else if (rc == 0)
1646                 rc = 1;
1647
1648         return rc;
1649 }
1650
1651 static int lfsck_layout_scan_orphan(const struct lu_env *env,
1652                                     struct lfsck_component *com,
1653                                     struct lfsck_tgt_desc *ltd)
1654 {
1655         /* XXX: To be extended in other patch. */
1656
1657         return 0;
1658 }
1659
1660 /* For the MDT-object with dangling reference, we need to re-create
1661  * the missed OST-object with the known FID/owner information. */
1662 static int lfsck_layout_recreate_ostobj(const struct lu_env *env,
1663                                         struct lfsck_component *com,
1664                                         struct lfsck_layout_req *llr,
1665                                         struct lu_attr *la)
1666 {
1667         struct lfsck_thread_info        *info   = lfsck_env_info(env);
1668         struct filter_fid               *pfid   = &info->lti_new_pfid;
1669         struct dt_allocation_hint       *hint   = &info->lti_hint;
1670         struct dt_object                *parent = llr->llr_parent->llo_obj;
1671         struct dt_object                *child  = llr->llr_child;
1672         struct dt_device                *dev    = lfsck_obj2dt_dev(child);
1673         const struct lu_fid             *tfid   = lu_object_fid(&parent->do_lu);
1674         struct thandle                  *handle;
1675         struct lu_buf                   *buf;
1676         struct lustre_handle             lh     = { 0 };
1677         int                              rc;
1678         ENTRY;
1679
1680         CDEBUG(D_LFSCK, "Repair dangling reference for: parent "DFID
1681                ", child "DFID", OST-index %u, stripe-index %u, owner %u:%u\n",
1682                PFID(lfsck_dto2fid(parent)), PFID(lfsck_dto2fid(child)),
1683                llr->llr_ost_idx, llr->llr_lov_idx, la->la_uid, la->la_gid);
1684
1685         rc = lfsck_layout_lock(env, com, parent, &lh,
1686                                MDS_INODELOCK_LAYOUT | MDS_INODELOCK_XATTR);
1687         if (rc != 0)
1688                 RETURN(rc);
1689
1690         handle = dt_trans_create(env, dev);
1691         if (IS_ERR(handle))
1692                 GOTO(unlock1, rc = PTR_ERR(handle));
1693
1694         hint->dah_parent = NULL;
1695         hint->dah_mode = 0;
1696         pfid->ff_parent.f_seq = cpu_to_le64(tfid->f_seq);
1697         pfid->ff_parent.f_oid = cpu_to_le32(tfid->f_oid);
1698         pfid->ff_parent.f_ver = cpu_to_le32(llr->llr_lov_idx);
1699         buf = lfsck_buf_get(env, pfid, sizeof(struct filter_fid));
1700
1701         rc = dt_declare_create(env, child, la, hint, NULL, handle);
1702         if (rc != 0)
1703                 GOTO(stop, rc);
1704
1705         rc = dt_declare_xattr_set(env, child, buf, XATTR_NAME_FID,
1706                                   LU_XATTR_CREATE, handle);
1707         if (rc != 0)
1708                 GOTO(stop, rc);
1709
1710         rc = dt_trans_start(env, dev, handle);
1711         if (rc != 0)
1712                 GOTO(stop, rc);
1713
1714         dt_read_lock(env, parent, 0);
1715         if (unlikely(lu_object_is_dying(parent->do_lu.lo_header)))
1716                 GOTO(unlock2, rc = 1);
1717
1718         rc = dt_create(env, child, la, hint, NULL, handle);
1719         if (rc != 0)
1720                 GOTO(unlock2, rc);
1721
1722         rc = dt_xattr_set(env, child, buf, XATTR_NAME_FID, LU_XATTR_CREATE,
1723                           handle, BYPASS_CAPA);
1724
1725         GOTO(unlock2, rc);
1726
1727 unlock2:
1728         dt_read_unlock(env, parent);
1729
1730 stop:
1731         rc = lfsck_layout_trans_stop(env, dev, handle, rc);
1732
1733 unlock1:
1734         lfsck_layout_unlock(&lh);
1735
1736         return rc;
1737 }
1738
1739 /* If the OST-object does not recognize the MDT-object as its parent, and
1740  * there is no other MDT-object claims as its parent, then just trust the
1741  * given MDT-object as its parent. So update the OST-object filter_fid. */
1742 static int lfsck_layout_repair_unmatched_pair(const struct lu_env *env,
1743                                               struct lfsck_component *com,
1744                                               struct lfsck_layout_req *llr,
1745                                               const struct lu_attr *pla)
1746 {
1747         struct lfsck_thread_info        *info   = lfsck_env_info(env);
1748         struct filter_fid               *pfid   = &info->lti_new_pfid;
1749         struct lu_attr                  *tla    = &info->lti_la3;
1750         struct dt_object                *parent = llr->llr_parent->llo_obj;
1751         struct dt_object                *child  = llr->llr_child;
1752         struct dt_device                *dev    = lfsck_obj2dt_dev(child);
1753         const struct lu_fid             *tfid   = lu_object_fid(&parent->do_lu);
1754         struct thandle                  *handle;
1755         struct lu_buf                   *buf;
1756         struct lustre_handle             lh     = { 0 };
1757         int                              rc;
1758         ENTRY;
1759
1760         CDEBUG(D_LFSCK, "Repair unmatched MDT-OST pair for: parent "DFID
1761                ", child "DFID", OST-index %u, stripe-index %u, owner %u:%u\n",
1762                PFID(lfsck_dto2fid(parent)), PFID(lfsck_dto2fid(child)),
1763                llr->llr_ost_idx, llr->llr_lov_idx, pla->la_uid, pla->la_gid);
1764
1765         rc = lfsck_layout_lock(env, com, parent, &lh,
1766                                MDS_INODELOCK_LAYOUT | MDS_INODELOCK_XATTR);
1767         if (rc != 0)
1768                 RETURN(rc);
1769
1770         handle = dt_trans_create(env, dev);
1771         if (IS_ERR(handle))
1772                 GOTO(unlock1, rc = PTR_ERR(handle));
1773
1774         pfid->ff_parent.f_seq = cpu_to_le64(tfid->f_seq);
1775         pfid->ff_parent.f_oid = cpu_to_le32(tfid->f_oid);
1776         /* The ff_parent->f_ver is not the real parent fid->f_ver. Instead,
1777          * it is the OST-object index in the parent MDT-object layout. */
1778         pfid->ff_parent.f_ver = cpu_to_le32(llr->llr_lov_idx);
1779         buf = lfsck_buf_get(env, pfid, sizeof(struct filter_fid));
1780
1781         rc = dt_declare_xattr_set(env, child, buf, XATTR_NAME_FID, 0, handle);
1782         if (rc != 0)
1783                 GOTO(stop, rc);
1784
1785         tla->la_valid = LA_UID | LA_GID;
1786         tla->la_uid = pla->la_uid;
1787         tla->la_gid = pla->la_gid;
1788         rc = dt_declare_attr_set(env, child, tla, handle);
1789         if (rc != 0)
1790                 GOTO(stop, rc);
1791
1792         rc = dt_trans_start(env, dev, handle);
1793         if (rc != 0)
1794                 GOTO(stop, rc);
1795
1796         dt_write_lock(env, parent, 0);
1797         if (unlikely(lu_object_is_dying(parent->do_lu.lo_header)))
1798                 GOTO(unlock2, rc = 1);
1799
1800         rc = dt_xattr_set(env, child, buf, XATTR_NAME_FID, 0, handle,
1801                           BYPASS_CAPA);
1802         if (rc != 0)
1803                 GOTO(unlock2, rc);
1804
1805         /* Get the latest parent's owner. */
1806         rc = dt_attr_get(env, parent, tla, BYPASS_CAPA);
1807         if (rc != 0)
1808                 GOTO(unlock2, rc);
1809
1810         tla->la_valid = LA_UID | LA_GID;
1811         rc = dt_attr_set(env, child, tla, handle, BYPASS_CAPA);
1812
1813         GOTO(unlock2, rc);
1814
1815 unlock2:
1816         dt_write_unlock(env, parent);
1817
1818 stop:
1819         rc = lfsck_layout_trans_stop(env, dev, handle, rc);
1820
1821 unlock1:
1822         lfsck_layout_unlock(&lh);
1823
1824         return rc;
1825 }
1826
1827 /* If there are more than one MDT-objects claim as the OST-object's parent,
1828  * and the OST-object only recognizes one of them, then we need to generate
1829  * new OST-object(s) with new fid(s) for the non-recognized MDT-object(s). */
1830 static int lfsck_layout_repair_multiple_references(const struct lu_env *env,
1831                                                    struct lfsck_component *com,
1832                                                    struct lfsck_layout_req *llr,
1833                                                    struct lu_attr *la,
1834                                                    struct lu_buf *buf)
1835 {
1836         struct lfsck_thread_info        *info   = lfsck_env_info(env);
1837         struct dt_allocation_hint       *hint   = &info->lti_hint;
1838         struct dt_object_format         *dof    = &info->lti_dof;
1839         struct dt_device                *pdev   = com->lc_lfsck->li_next;
1840         struct ost_id                   *oi     = &info->lti_oi;
1841         struct dt_object                *parent = llr->llr_parent->llo_obj;
1842         struct dt_device                *cdev   = lfsck_obj2dt_dev(llr->llr_child);
1843         struct dt_object                *child  = NULL;
1844         struct lu_device                *d      = &cdev->dd_lu_dev;
1845         struct lu_object                *o      = NULL;
1846         struct thandle                  *handle;
1847         struct lov_mds_md_v1            *lmm;
1848         struct lov_ost_data_v1          *objs;
1849         struct lustre_handle             lh     = { 0 };
1850         __u32                            magic;
1851         int                              rc;
1852         ENTRY;
1853
1854         CDEBUG(D_LFSCK, "Repair multiple references for: parent "DFID
1855                ", OST-index %u, stripe-index %u, owner %u:%u\n",
1856                PFID(lfsck_dto2fid(parent)), llr->llr_ost_idx,
1857                llr->llr_lov_idx, la->la_uid, la->la_gid);
1858
1859         rc = lfsck_layout_lock(env, com, parent, &lh,
1860                                MDS_INODELOCK_LAYOUT | MDS_INODELOCK_XATTR);
1861         if (rc != 0)
1862                 RETURN(rc);
1863
1864         handle = dt_trans_create(env, pdev);
1865         if (IS_ERR(handle))
1866                 GOTO(unlock1, rc = PTR_ERR(handle));
1867
1868         o = lu_object_anon(env, d, NULL);
1869         if (IS_ERR(o))
1870                 GOTO(stop, rc = PTR_ERR(o));
1871
1872         child = container_of(o, struct dt_object, do_lu);
1873         o = lu_object_locate(o->lo_header, d->ld_type);
1874         if (unlikely(o == NULL))
1875                 GOTO(stop, rc = -EINVAL);
1876
1877         child = container_of(o, struct dt_object, do_lu);
1878         la->la_valid = LA_UID | LA_GID;
1879         hint->dah_parent = NULL;
1880         hint->dah_mode = 0;
1881         dof->dof_type = DFT_REGULAR;
1882         rc = dt_declare_create(env, child, la, NULL, NULL, handle);
1883         if (rc != 0)
1884                 GOTO(stop, rc);
1885
1886         rc = dt_declare_xattr_set(env, parent, buf, XATTR_NAME_LOV,
1887                                   LU_XATTR_REPLACE, handle);
1888         if (rc != 0)
1889                 GOTO(stop, rc);
1890
1891         rc = dt_trans_start(env, pdev, handle);
1892         if (rc != 0)
1893                 GOTO(stop, rc);
1894
1895         dt_write_lock(env, parent, 0);
1896         if (unlikely(lu_object_is_dying(parent->do_lu.lo_header)))
1897                 GOTO(unlock2, rc = 0);
1898
1899         rc = dt_xattr_get(env, parent, buf, XATTR_NAME_LOV, BYPASS_CAPA);
1900         if (unlikely(rc == 0 || rc == -ENODATA || rc == -ERANGE))
1901                 GOTO(unlock2, rc = 0);
1902
1903         lmm = buf->lb_buf;
1904         rc = lfsck_layout_verify_header(lmm);
1905         if (rc != 0)
1906                 GOTO(unlock2, rc);
1907
1908         /* Someone change layout during the LFSCK, no need to repair then. */
1909         if (le16_to_cpu(lmm->lmm_layout_gen) != llr->llr_parent->llo_gen)
1910                 GOTO(unlock2, rc = 0);
1911
1912         rc = dt_create(env, child, la, hint, dof, handle);
1913         if (rc != 0)
1914                 GOTO(unlock2, rc);
1915
1916         /* Currently, we only support LOV_MAGIC_V1/LOV_MAGIC_V3 which has
1917          * been verified in lfsck_layout_verify_header() already. If some
1918          * new magic introduced in the future, then layout LFSCK needs to
1919          * be updated also. */
1920         magic = le32_to_cpu(lmm->lmm_magic);
1921         if (magic == LOV_MAGIC_V1) {
1922                 objs = &(lmm->lmm_objects[0]);
1923         } else {
1924                 LASSERT(magic == LOV_MAGIC_V3);
1925                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
1926         }
1927
1928         lmm->lmm_layout_gen = cpu_to_le16(llr->llr_parent->llo_gen + 1);
1929         fid_to_ostid(lu_object_fid(&child->do_lu), oi);
1930         ostid_cpu_to_le(oi, &objs[llr->llr_lov_idx].l_ost_oi);
1931         objs[llr->llr_lov_idx].l_ost_gen = cpu_to_le32(0);
1932         objs[llr->llr_lov_idx].l_ost_idx = cpu_to_le32(llr->llr_ost_idx);
1933         rc = dt_xattr_set(env, parent, buf, XATTR_NAME_LOV,
1934                           LU_XATTR_REPLACE, handle, BYPASS_CAPA);
1935
1936         GOTO(unlock2, rc = (rc == 0 ? 1 : rc));
1937
1938 unlock2:
1939         dt_write_unlock(env, parent);
1940
1941 stop:
1942         if (child != NULL)
1943                 lu_object_put(env, &child->do_lu);
1944
1945         dt_trans_stop(env, pdev, handle);
1946
1947 unlock1:
1948         lfsck_layout_unlock(&lh);
1949
1950         return rc;
1951 }
1952
1953 /* If the MDT-object and the OST-object have different owner information,
1954  * then trust the MDT-object, because the normal chown/chgrp handle order
1955  * is from MDT to OST, and it is possible that some chown/chgrp operation
1956  * is partly done. */
1957 static int lfsck_layout_repair_owner(const struct lu_env *env,
1958                                      struct lfsck_component *com,
1959                                      struct lfsck_layout_req *llr,
1960                                      struct lu_attr *pla)
1961 {
1962         struct lfsck_thread_info        *info   = lfsck_env_info(env);
1963         struct lu_attr                  *tla    = &info->lti_la3;
1964         struct dt_object                *parent = llr->llr_parent->llo_obj;
1965         struct dt_object                *child  = llr->llr_child;
1966         struct dt_device                *dev    = lfsck_obj2dt_dev(child);
1967         struct thandle                  *handle;
1968         int                              rc;
1969         ENTRY;
1970
1971         CDEBUG(D_LFSCK, "Repair inconsistent file owner for: parent "DFID
1972                ", child "DFID", OST-index %u, stripe-index %u, owner %u:%u\n",
1973                PFID(lfsck_dto2fid(parent)), PFID(lfsck_dto2fid(child)),
1974                llr->llr_ost_idx, llr->llr_lov_idx, pla->la_uid, pla->la_gid);
1975
1976         handle = dt_trans_create(env, dev);
1977         if (IS_ERR(handle))
1978                 RETURN(PTR_ERR(handle));
1979
1980         tla->la_uid = pla->la_uid;
1981         tla->la_gid = pla->la_gid;
1982         tla->la_valid = LA_UID | LA_GID;
1983         rc = dt_declare_attr_set(env, child, tla, handle);
1984         if (rc != 0)
1985                 GOTO(stop, rc);
1986
1987         rc = dt_trans_start(env, dev, handle);
1988         if (rc != 0)
1989                 GOTO(stop, rc);
1990
1991         /* Use the dt_object lock to serialize with destroy and attr_set. */
1992         dt_read_lock(env, parent, 0);
1993         if (unlikely(lu_object_is_dying(parent->do_lu.lo_header)))
1994                 GOTO(unlock, rc = 1);
1995
1996         /* Get the latest parent's owner. */
1997         rc = dt_attr_get(env, parent, tla, BYPASS_CAPA);
1998         if (rc != 0) {
1999                 CWARN("%s: fail to get the latest parent's ("DFID") owner, "
2000                       "not sure whether some others chown/chgrp during the "
2001                       "LFSCK: rc = %d\n", lfsck_lfsck2name(com->lc_lfsck),
2002                       PFID(lfsck_dto2fid(parent)), rc);
2003
2004                 GOTO(unlock, rc);
2005         }
2006
2007         /* Some others chown/chgrp during the LFSCK, needs to do nothing. */
2008         if (unlikely(tla->la_uid != pla->la_uid ||
2009                      tla->la_gid != pla->la_gid))
2010                 GOTO(unlock, rc = 1);
2011
2012         tla->la_valid = LA_UID | LA_GID;
2013         rc = dt_attr_set(env, child, tla, handle, BYPASS_CAPA);
2014
2015         GOTO(unlock, rc);
2016
2017 unlock:
2018         dt_read_unlock(env, parent);
2019
2020 stop:
2021         rc = lfsck_layout_trans_stop(env, dev, handle, rc);
2022
2023         return rc;
2024 }
2025
2026 /* Check whether the OST-object correctly back points to the
2027  * MDT-object (@parent) via the XATTR_NAME_FID xattr (@pfid). */
2028 static int lfsck_layout_check_parent(const struct lu_env *env,
2029                                      struct lfsck_component *com,
2030                                      struct dt_object *parent,
2031                                      const struct lu_fid *pfid,
2032                                      const struct lu_fid *cfid,
2033                                      const struct lu_attr *pla,
2034                                      const struct lu_attr *cla,
2035                                      struct lfsck_layout_req *llr,
2036                                      struct lu_buf *lov_ea, __u32 idx)
2037 {
2038         struct lfsck_thread_info        *info   = lfsck_env_info(env);
2039         struct lu_buf                   *buf    = &info->lti_big_buf;
2040         struct dt_object                *tobj;
2041         struct lov_mds_md_v1            *lmm;
2042         struct lov_ost_data_v1          *objs;
2043         int                              rc;
2044         int                              i;
2045         __u32                            magic;
2046         __u16                            count;
2047         ENTRY;
2048
2049         if (fid_is_zero(pfid)) {
2050                 /* client never wrote. */
2051                 if (cla->la_size == 0 && cla->la_blocks == 0) {
2052                         if (unlikely(cla->la_uid != pla->la_uid ||
2053                                      cla->la_gid != pla->la_gid))
2054                                 RETURN (LLIT_INCONSISTENT_OWNER);
2055
2056                         RETURN(0);
2057                 }
2058
2059                 RETURN(LLIT_UNMATCHED_PAIR);
2060         }
2061
2062         if (unlikely(!fid_is_sane(pfid)))
2063                 RETURN(LLIT_UNMATCHED_PAIR);
2064
2065         if (lu_fid_eq(pfid, lu_object_fid(&parent->do_lu))) {
2066                 if (llr->llr_lov_idx == idx)
2067                         RETURN(0);
2068
2069                 RETURN(LLIT_UNMATCHED_PAIR);
2070         }
2071
2072         tobj = lfsck_object_find(env, com->lc_lfsck, pfid);
2073         if (tobj == NULL)
2074                 RETURN(LLIT_UNMATCHED_PAIR);
2075
2076         if (IS_ERR(tobj))
2077                 RETURN(PTR_ERR(tobj));
2078
2079         if (!dt_object_exists(tobj))
2080                 GOTO(out, rc = LLIT_UNMATCHED_PAIR);
2081
2082         /* Load the tobj's layout EA, in spite of it is a local MDT-object or
2083          * remote one on another MDT. Then check whether the given OST-object
2084          * is in such layout. If yes, it is multiple referenced, otherwise it
2085          * is unmatched referenced case. */
2086         rc = lfsck_layout_get_lovea(env, tobj, buf, NULL);
2087         if (rc == 0)
2088                 GOTO(out, rc = LLIT_UNMATCHED_PAIR);
2089
2090         if (rc < 0)
2091                 GOTO(out, rc);
2092
2093         lmm = buf->lb_buf;
2094         rc = lfsck_layout_verify_header(lmm);
2095         if (rc != 0)
2096                 GOTO(out, rc);
2097
2098         /* Currently, we only support LOV_MAGIC_V1/LOV_MAGIC_V3 which has
2099          * been verified in lfsck_layout_verify_header() already. If some
2100          * new magic introduced in the future, then layout LFSCK needs to
2101          * be updated also. */
2102         magic = le32_to_cpu(lmm->lmm_magic);
2103         if (magic == LOV_MAGIC_V1) {
2104                 objs = &(lmm->lmm_objects[0]);
2105         } else {
2106                 LASSERT(magic == LOV_MAGIC_V3);
2107                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
2108         }
2109
2110         count = le16_to_cpu(lmm->lmm_stripe_count);
2111         for (i = 0; i < count; i++, objs++) {
2112                 struct lu_fid           *tfid   = &info->lti_fid2;
2113                 struct ost_id           *oi     = &info->lti_oi;
2114
2115                 ostid_le_to_cpu(&objs->l_ost_oi, oi);
2116                 ostid_to_fid(tfid, oi, le32_to_cpu(objs->l_ost_idx));
2117                 if (lu_fid_eq(cfid, tfid)) {
2118                         *lov_ea = *buf;
2119
2120                         GOTO(out, rc = LLIT_MULTIPLE_REFERENCED);
2121                 }
2122         }
2123
2124         GOTO(out, rc = LLIT_UNMATCHED_PAIR);
2125
2126 out:
2127         lfsck_object_put(env, tobj);
2128
2129         return rc;
2130 }
2131
2132 static int lfsck_layout_assistant_handle_one(const struct lu_env *env,
2133                                              struct lfsck_component *com,
2134                                              struct lfsck_layout_req *llr)
2135 {
2136         struct lfsck_layout                  *lo     = com->lc_file_ram;
2137         struct lfsck_thread_info             *info   = lfsck_env_info(env);
2138         struct filter_fid_old                *pea    = &info->lti_old_pfid;
2139         struct lu_fid                        *pfid   = &info->lti_fid;
2140         struct lu_buf                        *buf    = NULL;
2141         struct dt_object                     *parent = llr->llr_parent->llo_obj;
2142         struct dt_object                     *child  = llr->llr_child;
2143         struct lu_attr                       *pla    = &info->lti_la;
2144         struct lu_attr                       *cla    = &info->lti_la2;
2145         struct lfsck_instance                *lfsck  = com->lc_lfsck;
2146         struct lfsck_bookmark                *bk     = &lfsck->li_bookmark_ram;
2147         enum lfsck_layout_inconsistency_type  type   = LLIT_NONE;
2148         __u32                                 idx    = 0;
2149         int                                   rc;
2150         ENTRY;
2151
2152         rc = dt_attr_get(env, parent, pla, BYPASS_CAPA);
2153         if (rc != 0) {
2154                 if (lu_object_is_dying(parent->do_lu.lo_header))
2155                         RETURN(0);
2156
2157                 GOTO(out, rc);
2158         }
2159
2160         rc = dt_attr_get(env, child, cla, BYPASS_CAPA);
2161         if (rc == -ENOENT) {
2162                 if (lu_object_is_dying(parent->do_lu.lo_header))
2163                         RETURN(0);
2164
2165                 type = LLIT_DANGLING;
2166                 goto repair;
2167         }
2168
2169         if (rc != 0)
2170                 GOTO(out, rc);
2171
2172         buf = lfsck_buf_get(env, pea, sizeof(struct filter_fid_old));
2173         rc= dt_xattr_get(env, child, buf, XATTR_NAME_FID, BYPASS_CAPA);
2174         if (unlikely(rc >= 0 && rc != sizeof(struct filter_fid_old) &&
2175                      rc != sizeof(struct filter_fid))) {
2176                 type = LLIT_UNMATCHED_PAIR;
2177                 goto repair;
2178         }
2179
2180         if (rc < 0 && rc != -ENODATA)
2181                 GOTO(out, rc);
2182
2183         if (rc == -ENODATA) {
2184                 fid_zero(pfid);
2185         } else {
2186                 fid_le_to_cpu(pfid, &pea->ff_parent);
2187                 /* OST-object does not save parent FID::f_ver, instead,
2188                  * the OST-object index in the parent MDT-object layout
2189                  * EA reuses the pfid->f_ver. */
2190                 idx = pfid->f_ver;
2191                 pfid->f_ver = 0;
2192         }
2193
2194         rc = lfsck_layout_check_parent(env, com, parent, pfid,
2195                                        lu_object_fid(&child->do_lu),
2196                                        pla, cla, llr, buf, idx);
2197         if (rc > 0) {
2198                 type = rc;
2199                 goto repair;
2200         }
2201
2202         if (rc < 0)
2203                 GOTO(out, rc);
2204
2205         if (unlikely(cla->la_uid != pla->la_uid ||
2206                      cla->la_gid != pla->la_gid)) {
2207                 type = LLIT_INCONSISTENT_OWNER;
2208                 goto repair;
2209         }
2210
2211 repair:
2212         if (bk->lb_param & LPF_DRYRUN) {
2213                 if (type != LLIT_NONE)
2214                         GOTO(out, rc = 1);
2215                 else
2216                         GOTO(out, rc = 0);
2217         }
2218
2219         switch (type) {
2220         case LLIT_DANGLING:
2221                 memset(cla, 0, sizeof(*cla));
2222                 cla->la_uid = pla->la_uid;
2223                 cla->la_gid = pla->la_gid;
2224                 cla->la_mode = S_IFREG | 0666;
2225                 cla->la_valid = LA_TYPE | LA_MODE | LA_UID | LA_GID |
2226                                 LA_ATIME | LA_MTIME | LA_CTIME;
2227                 rc = lfsck_layout_recreate_ostobj(env, com, llr, cla);
2228                 break;
2229         case LLIT_UNMATCHED_PAIR:
2230                 rc = lfsck_layout_repair_unmatched_pair(env, com, llr, pla);
2231                 break;
2232         case LLIT_MULTIPLE_REFERENCED:
2233                 rc = lfsck_layout_repair_multiple_references(env, com, llr,
2234                                                              pla, buf);
2235                 break;
2236         case LLIT_INCONSISTENT_OWNER:
2237                 rc = lfsck_layout_repair_owner(env, com, llr, pla);
2238                 break;
2239         default:
2240                 rc = 0;
2241                 break;
2242         }
2243
2244         GOTO(out, rc);
2245
2246 out:
2247         down_write(&com->lc_sem);
2248         if (rc < 0) {
2249                 /* If cannot touch the target server,
2250                  * mark the LFSCK as INCOMPLETE. */
2251                 if (rc == -ENOTCONN || rc == -ESHUTDOWN || rc == -ETIMEDOUT ||
2252                     rc == -EHOSTDOWN || rc == -EHOSTUNREACH) {
2253                         lo->ll_flags |= LF_INCOMPLETE;
2254                         lo->ll_objs_skipped++;
2255                         rc = 0;
2256                 } else {
2257                         lo->ll_objs_failed_phase1++;
2258                 }
2259         } else if (rc > 0) {
2260                 LASSERTF(type > LLIT_NONE && type <= LLIT_MAX,
2261                          "unknown type = %d\n", type);
2262
2263                 lo->ll_objs_repaired[type - 1]++;
2264         }
2265         up_write(&com->lc_sem);
2266
2267         return rc;
2268 }
2269
2270 static int lfsck_layout_assistant(void *args)
2271 {
2272         struct lfsck_thread_args        *lta     = args;
2273         struct lu_env                   *env     = &lta->lta_env;
2274         struct lfsck_component          *com     = lta->lta_com;
2275         struct lfsck_instance           *lfsck   = lta->lta_lfsck;
2276         struct lfsck_bookmark           *bk      = &lfsck->li_bookmark_ram;
2277         struct lfsck_position           *pos     = &com->lc_pos_start;
2278         struct lfsck_thread_info        *info    = lfsck_env_info(env);
2279         struct lfsck_request            *lr      = &info->lti_lr;
2280         struct lfsck_layout_master_data *llmd    = com->lc_data;
2281         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
2282         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
2283         struct lfsck_layout_req         *llr;
2284         struct l_wait_info               lwi     = { 0 };
2285         int                              rc      = 0;
2286         int                              rc1     = 0;
2287         __u32                            flags;
2288         ENTRY;
2289
2290         if (lta->lta_lsp->lsp_start != NULL)
2291                 flags  = lta->lta_lsp->lsp_start->ls_flags;
2292         else
2293                 flags = bk->lb_param;
2294         memset(lr, 0, sizeof(*lr));
2295         lr->lr_event = LE_START;
2296         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
2297         lr->lr_valid = LSV_SPEED_LIMIT | LSV_ERROR_HANDLE | LSV_DRYRUN |
2298                        LSV_ASYNC_WINDOWS;
2299         lr->lr_speed = bk->lb_speed_limit;
2300         lr->lr_version = bk->lb_version;
2301         lr->lr_param = bk->lb_param;
2302         lr->lr_async_windows = bk->lb_async_windows;
2303         if (pos->lp_oit_cookie <= 1)
2304                 lr->lr_param |= LPF_RESET;
2305
2306         rc = lfsck_layout_master_notify_others(env, com, lr, flags);
2307         if (rc != 0) {
2308                 CERROR("%s: fail to notify others for layout start: rc = %d\n",
2309                        lfsck_lfsck2name(lfsck), rc);
2310                 GOTO(fini, rc);
2311         }
2312
2313         spin_lock(&llmd->llmd_lock);
2314         thread_set_flags(athread, SVC_RUNNING);
2315         spin_unlock(&llmd->llmd_lock);
2316         wake_up_all(&mthread->t_ctl_waitq);
2317
2318         while (1) {
2319                 while (!list_empty(&llmd->llmd_req_list)) {
2320                         bool wakeup = false;
2321
2322                         if (unlikely(llmd->llmd_exit))
2323                                 GOTO(cleanup1, rc = llmd->llmd_post_result);
2324
2325                         llr = list_entry(llmd->llmd_req_list.next,
2326                                          struct lfsck_layout_req,
2327                                          llr_list);
2328                         /* Only the lfsck_layout_assistant thread itself can
2329                          * remove the "llr" from the head of the list, LFSCK
2330                          * engine thread only inserts other new "lld" at the
2331                          * end of the list. So it is safe to handle current
2332                          * "llr" without the spin_lock. */
2333                         rc = lfsck_layout_assistant_handle_one(env, com, llr);
2334                         spin_lock(&llmd->llmd_lock);
2335                         list_del_init(&llr->llr_list);
2336                         if (bk->lb_async_windows != 0 &&
2337                             llmd->llmd_prefetched >= bk->lb_async_windows)
2338                                 wakeup = true;
2339
2340                         llmd->llmd_prefetched--;
2341                         spin_unlock(&llmd->llmd_lock);
2342                         if (wakeup)
2343                                 wake_up_all(&mthread->t_ctl_waitq);
2344
2345                         lfsck_layout_req_fini(env, llr);
2346                         if (rc < 0 && bk->lb_param & LPF_FAILOUT)
2347                                 GOTO(cleanup1, rc);
2348                 }
2349
2350                 /* Wakeup the master engine if it is waiting in checkpoint. */
2351                 wake_up_all(&mthread->t_ctl_waitq);
2352
2353                 l_wait_event(athread->t_ctl_waitq,
2354                              !lfsck_layout_req_empty(llmd) ||
2355                              llmd->llmd_exit ||
2356                              llmd->llmd_to_post ||
2357                              llmd->llmd_to_double_scan,
2358                              &lwi);
2359
2360                 if (unlikely(llmd->llmd_exit))
2361                         GOTO(cleanup1, rc = llmd->llmd_post_result);
2362
2363                 if (!list_empty(&llmd->llmd_req_list))
2364                         continue;
2365
2366                 if (llmd->llmd_to_post) {
2367                         llmd->llmd_to_post = 0;
2368                         LASSERT(llmd->llmd_post_result > 0);
2369
2370                         memset(lr, 0, sizeof(*lr));
2371                         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
2372                         lr->lr_event = LE_PHASE1_DONE;
2373                         lr->lr_status = llmd->llmd_post_result;
2374                         rc = lfsck_layout_master_notify_others(env, com, lr, 0);
2375                         if (rc != 0)
2376                                 CERROR("%s: failed to notify others "
2377                                        "for layout post: rc = %d\n",
2378                                        lfsck_lfsck2name(lfsck), rc);
2379
2380                         /* Wakeup the master engine to go ahead. */
2381                         wake_up_all(&mthread->t_ctl_waitq);
2382                 }
2383
2384                 if (llmd->llmd_to_double_scan) {
2385                         llmd->llmd_to_double_scan = 0;
2386                         atomic_inc(&lfsck->li_double_scan_count);
2387                         llmd->llmd_in_double_scan = 1;
2388                         wake_up_all(&mthread->t_ctl_waitq);
2389
2390                         while (llmd->llmd_in_double_scan) {
2391                                 struct lfsck_tgt_descs  *ltds =
2392                                                         &lfsck->li_ost_descs;
2393                                 struct lfsck_tgt_desc   *ltd;
2394
2395                                 rc = lfsck_layout_master_query_others(env, com);
2396                                 if (lfsck_layout_master_to_orphan(llmd))
2397                                         goto orphan;
2398
2399                                 if (rc < 0)
2400                                         GOTO(cleanup2, rc);
2401
2402                                 /* Pull LFSCK status on related targets once
2403                                  * per 30 seconds if we are not notified. */
2404                                 lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(30),
2405                                                            cfs_time_seconds(1),
2406                                                            NULL, NULL);
2407                                 rc = l_wait_event(athread->t_ctl_waitq,
2408                                         lfsck_layout_master_to_orphan(llmd) ||
2409                                         llmd->llmd_exit ||
2410                                         !thread_is_running(mthread),
2411                                         &lwi);
2412
2413                                 if (unlikely(llmd->llmd_exit ||
2414                                              !thread_is_running(mthread)))
2415                                         GOTO(cleanup2, rc = 0);
2416
2417                                 if (rc == -ETIMEDOUT)
2418                                         continue;
2419
2420                                 if (rc < 0)
2421                                         GOTO(cleanup2, rc);
2422
2423 orphan:
2424                                 spin_lock(&ltds->ltd_lock);
2425                                 while (!list_empty(
2426                                                 &llmd->llmd_ost_phase2_list)) {
2427                                         ltd = list_entry(
2428                                               llmd->llmd_ost_phase2_list.next,
2429                                               struct lfsck_tgt_desc,
2430                                               ltd_layout_phase_list);
2431                                         list_del_init(
2432                                                 &ltd->ltd_layout_phase_list);
2433                                         spin_unlock(&ltds->ltd_lock);
2434
2435                                         rc = lfsck_layout_scan_orphan(env, com,
2436                                                                       ltd);
2437                                         if (rc != 0 &&
2438                                             bk->lb_param & LPF_FAILOUT)
2439                                                 GOTO(cleanup2, rc);
2440
2441                                         if (unlikely(llmd->llmd_exit ||
2442                                                 !thread_is_running(mthread)))
2443                                                 GOTO(cleanup2, rc = 0);
2444
2445                                         spin_lock(&ltds->ltd_lock);
2446                                 }
2447
2448                                 if (list_empty(&llmd->llmd_ost_phase1_list)) {
2449                                         spin_unlock(&ltds->ltd_lock);
2450                                         GOTO(cleanup2, rc = 1);
2451                                 }
2452                                 spin_unlock(&ltds->ltd_lock);
2453                         }
2454                 }
2455         }
2456
2457 cleanup1:
2458         /* Cleanup the unfinished requests. */
2459         spin_lock(&llmd->llmd_lock);
2460         if (rc < 0)
2461                 llmd->llmd_assistant_status = rc;
2462
2463         while (!list_empty(&llmd->llmd_req_list)) {
2464                 llr = list_entry(llmd->llmd_req_list.next,
2465                                  struct lfsck_layout_req,
2466                                  llr_list);
2467                 list_del_init(&llr->llr_list);
2468                 llmd->llmd_prefetched--;
2469                 spin_unlock(&llmd->llmd_lock);
2470                 lfsck_layout_req_fini(env, llr);
2471                 spin_lock(&llmd->llmd_lock);
2472         }
2473         spin_unlock(&llmd->llmd_lock);
2474
2475         LASSERTF(llmd->llmd_prefetched == 0, "unmatched prefeteched objs %d\n",
2476                  llmd->llmd_prefetched);
2477
2478 cleanup2:
2479         memset(lr, 0, sizeof(*lr));
2480         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
2481         if (rc > 0) {
2482                 lr->lr_event = LE_PHASE2_DONE;
2483                 flags = 0;
2484                 lr->lr_status = rc;
2485         } else if (rc == 0) {
2486                 lr->lr_event = LE_STOP;
2487                 if (lfsck->li_status == LS_PAUSED ||
2488                     lfsck->li_status == LS_CO_PAUSED) {
2489                         flags = 0;
2490                         lr->lr_status = LS_CO_PAUSED;
2491                 } else if (lfsck->li_status == LS_STOPPED ||
2492                          lfsck->li_status == LS_CO_STOPPED) {
2493                         flags = lfsck->li_flags;
2494                         if (flags & LPF_BROADCAST)
2495                                 lr->lr_status = LS_STOPPED;
2496                         else
2497                                 lr->lr_status = LS_CO_STOPPED;
2498                 } else {
2499                         LBUG();
2500                 }
2501         } else {
2502                 lr->lr_event = LE_STOP;
2503                 flags = 0;
2504                 lr->lr_status = LS_CO_FAILED;
2505         }
2506
2507         rc1 = lfsck_layout_master_notify_others(env, com, lr, flags);
2508         if (rc1 != 0) {
2509                 CERROR("%s: failed to notify others for layout quit: rc = %d\n",
2510                        lfsck_lfsck2name(lfsck), rc1);
2511                 rc = rc1;
2512         }
2513
2514         /* Under force exit case, some requests may be just freed without
2515          * verification, those objects should be re-handled when next run.
2516          * So not update the on-disk tracing file under such case. */
2517         if (!llmd->llmd_exit)
2518                 rc1 = lfsck_layout_double_scan_result(env, com, rc);
2519
2520 fini:
2521         if (llmd->llmd_in_double_scan)
2522                 atomic_dec(&lfsck->li_double_scan_count);
2523
2524         spin_lock(&llmd->llmd_lock);
2525         llmd->llmd_assistant_status = (rc1 != 0 ? rc1 : rc);
2526         thread_set_flags(athread, SVC_STOPPED);
2527         wake_up_all(&mthread->t_ctl_waitq);
2528         spin_unlock(&llmd->llmd_lock);
2529         lfsck_thread_args_fini(lta);
2530
2531         return rc;
2532 }
2533
2534 static int
2535 lfsck_layout_slave_async_interpret(const struct lu_env *env,
2536                                    struct ptlrpc_request *req,
2537                                    void *args, int rc)
2538 {
2539         struct lfsck_layout_slave_async_args *llsaa = args;
2540         struct obd_export                    *exp   = llsaa->llsaa_exp;
2541         struct lfsck_component               *com   = llsaa->llsaa_com;
2542         struct lfsck_layout_slave_target     *llst  = llsaa->llsaa_llst;
2543         struct lfsck_layout_slave_data       *llsd  = com->lc_data;
2544         bool                                  done  = false;
2545
2546         if (rc != 0) {
2547                 /* It is quite probably caused by target crash,
2548                  * to make the LFSCK can go ahead, assume that
2549                  * the target finished the LFSCK prcoessing. */
2550                 done = true;
2551         } else {
2552                 struct lfsck_reply *lr;
2553
2554                 lr = req_capsule_server_get(&req->rq_pill, &RMF_LFSCK_REPLY);
2555                 if (lr->lr_status != LS_SCANNING_PHASE1 &&
2556                     lr->lr_status != LS_SCANNING_PHASE2)
2557                         done = true;
2558         }
2559         if (done)
2560                 lfsck_layout_llst_del(llsd, llst);
2561         lfsck_layout_llst_put(llst);
2562         lfsck_component_put(env, com);
2563         class_export_put(exp);
2564
2565         return 0;
2566 }
2567
2568 static int lfsck_layout_async_query(const struct lu_env *env,
2569                                     struct lfsck_component *com,
2570                                     struct obd_export *exp,
2571                                     struct lfsck_layout_slave_target *llst,
2572                                     struct lfsck_request *lr,
2573                                     struct ptlrpc_request_set *set)
2574 {
2575         struct lfsck_layout_slave_async_args *llsaa;
2576         struct ptlrpc_request                *req;
2577         struct lfsck_request                 *tmp;
2578         int                                   rc;
2579         ENTRY;
2580
2581         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LFSCK_QUERY);
2582         if (req == NULL)
2583                 RETURN(-ENOMEM);
2584
2585         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, LFSCK_QUERY);
2586         if (rc != 0) {
2587                 ptlrpc_request_free(req);
2588                 RETURN(rc);
2589         }
2590
2591         tmp = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
2592         *tmp = *lr;
2593         ptlrpc_request_set_replen(req);
2594
2595         llsaa = ptlrpc_req_async_args(req);
2596         llsaa->llsaa_exp = exp;
2597         llsaa->llsaa_com = lfsck_component_get(com);
2598         llsaa->llsaa_llst = llst;
2599         req->rq_interpret_reply = lfsck_layout_slave_async_interpret;
2600         ptlrpc_set_add_req(set, req);
2601
2602         RETURN(0);
2603 }
2604
2605 static int lfsck_layout_async_notify(const struct lu_env *env,
2606                                      struct obd_export *exp,
2607                                      struct lfsck_request *lr,
2608                                      struct ptlrpc_request_set *set)
2609 {
2610         struct ptlrpc_request   *req;
2611         struct lfsck_request    *tmp;
2612         int                      rc;
2613         ENTRY;
2614
2615         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LFSCK_NOTIFY);
2616         if (req == NULL)
2617                 RETURN(-ENOMEM);
2618
2619         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, LFSCK_NOTIFY);
2620         if (rc != 0) {
2621                 ptlrpc_request_free(req);
2622                 RETURN(rc);
2623         }
2624
2625         tmp = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
2626         *tmp = *lr;
2627         ptlrpc_request_set_replen(req);
2628         ptlrpc_set_add_req(set, req);
2629
2630         RETURN(0);
2631 }
2632
2633 static int
2634 lfsck_layout_slave_query_master(const struct lu_env *env,
2635                                 struct lfsck_component *com)
2636 {
2637         struct lfsck_request             *lr    = &lfsck_env_info(env)->lti_lr;
2638         struct lfsck_instance            *lfsck = com->lc_lfsck;
2639         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
2640         struct lfsck_layout_slave_target *llst;
2641         struct obd_export                *exp;
2642         struct ptlrpc_request_set        *set;
2643         int                               cnt   = 0;
2644         int                               rc    = 0;
2645         int                               rc1   = 0;
2646         ENTRY;
2647
2648         set = ptlrpc_prep_set();
2649         if (set == NULL)
2650                 RETURN(-ENOMEM);
2651
2652         memset(lr, 0, sizeof(*lr));
2653         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
2654         lr->lr_event = LE_QUERY;
2655         lr->lr_active = LT_LAYOUT;
2656
2657         llsd->llsd_touch_gen++;
2658         spin_lock(&llsd->llsd_lock);
2659         while (!list_empty(&llsd->llsd_master_list)) {
2660                 llst = list_entry(llsd->llsd_master_list.next,
2661                                   struct lfsck_layout_slave_target,
2662                                   llst_list);
2663                 if (llst->llst_gen == llsd->llsd_touch_gen)
2664                         break;
2665
2666                 llst->llst_gen = llsd->llsd_touch_gen;
2667                 list_del(&llst->llst_list);
2668                 list_add_tail(&llst->llst_list,
2669                               &llsd->llsd_master_list);
2670                 atomic_inc(&llst->llst_ref);
2671                 spin_unlock(&llsd->llsd_lock);
2672
2673                 exp = lustre_find_lwp_by_index(lfsck->li_obd->obd_name,
2674                                                llst->llst_index);
2675                 if (exp == NULL) {
2676                         lfsck_layout_llst_del(llsd, llst);
2677                         lfsck_layout_llst_put(llst);
2678                         spin_lock(&llsd->llsd_lock);
2679                         continue;
2680                 }
2681
2682                 rc = lfsck_layout_async_query(env, com, exp, llst, lr, set);
2683                 if (rc != 0) {
2684                         CERROR("%s: slave fail to query %s for layout: "
2685                                "rc = %d\n", lfsck_lfsck2name(lfsck),
2686                                exp->exp_obd->obd_name, rc);
2687                         rc1 = rc;
2688                         lfsck_layout_llst_put(llst);
2689                         class_export_put(exp);
2690                 } else {
2691                         cnt++;
2692                 }
2693                 spin_lock(&llsd->llsd_lock);
2694         }
2695         spin_unlock(&llsd->llsd_lock);
2696
2697         if (cnt > 0)
2698                 rc = ptlrpc_set_wait(set);
2699         ptlrpc_set_destroy(set);
2700
2701         RETURN(rc1 != 0 ? rc1 : rc);
2702 }
2703
2704 static void
2705 lfsck_layout_slave_notify_master(const struct lu_env *env,
2706                                  struct lfsck_component *com,
2707                                  enum lfsck_events event, int result)
2708 {
2709         struct lfsck_instance            *lfsck = com->lc_lfsck;
2710         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
2711         struct lfsck_request             *lr    = &lfsck_env_info(env)->lti_lr;
2712         struct lfsck_layout_slave_target *llst;
2713         struct obd_export                *exp;
2714         struct ptlrpc_request_set        *set;
2715         int                               cnt   = 0;
2716         int                               rc;
2717         ENTRY;
2718
2719         set = ptlrpc_prep_set();
2720         if (set == NULL)
2721                 RETURN_EXIT;
2722
2723         memset(lr, 0, sizeof(*lr));
2724         lr->lr_event = event;
2725         lr->lr_flags = LEF_FROM_OST;
2726         lr->lr_status = result;
2727         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
2728         lr->lr_active = LT_LAYOUT;
2729         llsd->llsd_touch_gen++;
2730         spin_lock(&llsd->llsd_lock);
2731         while (!list_empty(&llsd->llsd_master_list)) {
2732                 llst = list_entry(llsd->llsd_master_list.next,
2733                                   struct lfsck_layout_slave_target,
2734                                   llst_list);
2735                 if (llst->llst_gen == llsd->llsd_touch_gen)
2736                         break;
2737
2738                 llst->llst_gen = llsd->llsd_touch_gen;
2739                 list_del(&llst->llst_list);
2740                 list_add_tail(&llst->llst_list,
2741                               &llsd->llsd_master_list);
2742                 atomic_inc(&llst->llst_ref);
2743                 spin_unlock(&llsd->llsd_lock);
2744
2745                 exp = lustre_find_lwp_by_index(lfsck->li_obd->obd_name,
2746                                                llst->llst_index);
2747                 if (exp == NULL) {
2748                         lfsck_layout_llst_del(llsd, llst);
2749                         lfsck_layout_llst_put(llst);
2750                         spin_lock(&llsd->llsd_lock);
2751                         continue;
2752                 }
2753
2754                 rc = lfsck_layout_async_notify(env, exp, lr, set);
2755                 if (rc != 0)
2756                         CERROR("%s: slave fail to notify %s for layout: "
2757                                "rc = %d\n", lfsck_lfsck2name(lfsck),
2758                                exp->exp_obd->obd_name, rc);
2759                 else
2760                         cnt++;
2761                 lfsck_layout_llst_put(llst);
2762                 class_export_put(exp);
2763                 spin_lock(&llsd->llsd_lock);
2764         }
2765         spin_unlock(&llsd->llsd_lock);
2766
2767         if (cnt > 0)
2768                 rc = ptlrpc_set_wait(set);
2769
2770         ptlrpc_set_destroy(set);
2771
2772         RETURN_EXIT;
2773 }
2774
2775 /* layout APIs */
2776
2777 static int lfsck_layout_reset(const struct lu_env *env,
2778                               struct lfsck_component *com, bool init)
2779 {
2780         struct lfsck_layout     *lo    = com->lc_file_ram;
2781         int                      rc;
2782
2783         down_write(&com->lc_sem);
2784         if (init) {
2785                 memset(lo, 0, com->lc_file_size);
2786         } else {
2787                 __u32 count = lo->ll_success_count;
2788                 __u64 last_time = lo->ll_time_last_complete;
2789
2790                 memset(lo, 0, com->lc_file_size);
2791                 lo->ll_success_count = count;
2792                 lo->ll_time_last_complete = last_time;
2793         }
2794
2795         lo->ll_magic = LFSCK_LAYOUT_MAGIC;
2796         lo->ll_status = LS_INIT;
2797
2798         rc = lfsck_layout_store(env, com);
2799         up_write(&com->lc_sem);
2800
2801         return rc;
2802 }
2803
2804 static void lfsck_layout_fail(const struct lu_env *env,
2805                               struct lfsck_component *com, bool new_checked)
2806 {
2807         struct lfsck_layout *lo = com->lc_file_ram;
2808
2809         down_write(&com->lc_sem);
2810         if (new_checked)
2811                 com->lc_new_checked++;
2812         lo->ll_objs_failed_phase1++;
2813         if (lo->ll_pos_first_inconsistent == 0) {
2814                 struct lfsck_instance *lfsck = com->lc_lfsck;
2815
2816                 lo->ll_pos_first_inconsistent =
2817                         lfsck->li_obj_oit->do_index_ops->dio_it.store(env,
2818                                                         lfsck->li_di_oit);
2819         }
2820         up_write(&com->lc_sem);
2821 }
2822
2823 static int lfsck_layout_master_checkpoint(const struct lu_env *env,
2824                                           struct lfsck_component *com, bool init)
2825 {
2826         struct lfsck_instance           *lfsck   = com->lc_lfsck;
2827         struct lfsck_layout             *lo      = com->lc_file_ram;
2828         struct lfsck_layout_master_data *llmd    = com->lc_data;
2829         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
2830         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
2831         struct l_wait_info               lwi     = { 0 };
2832         int                              rc;
2833
2834         if (com->lc_new_checked == 0 && !init)
2835                 return 0;
2836
2837         l_wait_event(mthread->t_ctl_waitq,
2838                      list_empty(&llmd->llmd_req_list) ||
2839                      !thread_is_running(mthread) ||
2840                      thread_is_stopped(athread),
2841                      &lwi);
2842
2843         if (!thread_is_running(mthread) || thread_is_stopped(athread))
2844                 return 0;
2845
2846         down_write(&com->lc_sem);
2847         if (init) {
2848                 lo->ll_pos_latest_start = lfsck->li_pos_current.lp_oit_cookie;
2849         } else {
2850                 lo->ll_pos_last_checkpoint =
2851                                         lfsck->li_pos_current.lp_oit_cookie;
2852                 lo->ll_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
2853                                 HALF_SEC - lfsck->li_time_last_checkpoint);
2854                 lo->ll_time_last_checkpoint = cfs_time_current_sec();
2855                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
2856                 com->lc_new_checked = 0;
2857         }
2858
2859         rc = lfsck_layout_store(env, com);
2860         up_write(&com->lc_sem);
2861
2862         return rc;
2863 }
2864
2865 static int lfsck_layout_slave_checkpoint(const struct lu_env *env,
2866                                          struct lfsck_component *com, bool init)
2867 {
2868         struct lfsck_instance   *lfsck = com->lc_lfsck;
2869         struct lfsck_layout     *lo    = com->lc_file_ram;
2870         int                      rc;
2871
2872         if (com->lc_new_checked == 0 && !init)
2873                 return 0;
2874
2875         down_write(&com->lc_sem);
2876
2877         if (init) {
2878                 lo->ll_pos_latest_start = lfsck->li_pos_current.lp_oit_cookie;
2879         } else {
2880                 lo->ll_pos_last_checkpoint =
2881                                         lfsck->li_pos_current.lp_oit_cookie;
2882                 lo->ll_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
2883                                 HALF_SEC - lfsck->li_time_last_checkpoint);
2884                 lo->ll_time_last_checkpoint = cfs_time_current_sec();
2885                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
2886                 com->lc_new_checked = 0;
2887         }
2888
2889         rc = lfsck_layout_store(env, com);
2890
2891         up_write(&com->lc_sem);
2892
2893         return rc;
2894 }
2895
2896 static int lfsck_layout_prep(const struct lu_env *env,
2897                              struct lfsck_component *com)
2898 {
2899         struct lfsck_instance   *lfsck  = com->lc_lfsck;
2900         struct lfsck_layout     *lo     = com->lc_file_ram;
2901         struct lfsck_position   *pos    = &com->lc_pos_start;
2902
2903         fid_zero(&pos->lp_dir_parent);
2904         pos->lp_dir_cookie = 0;
2905         if (lo->ll_status == LS_COMPLETED ||
2906             lo->ll_status == LS_PARTIAL) {
2907                 int rc;
2908
2909                 rc = lfsck_layout_reset(env, com, false);
2910                 if (rc != 0)
2911                         return rc;
2912         }
2913
2914         down_write(&com->lc_sem);
2915
2916         lo->ll_time_latest_start = cfs_time_current_sec();
2917
2918         spin_lock(&lfsck->li_lock);
2919         if (lo->ll_flags & LF_SCANNED_ONCE) {
2920                 if (!lfsck->li_drop_dryrun ||
2921                     lo->ll_pos_first_inconsistent == 0) {
2922                         lo->ll_status = LS_SCANNING_PHASE2;
2923                         list_del_init(&com->lc_link);
2924                         list_add_tail(&com->lc_link,
2925                                       &lfsck->li_list_double_scan);
2926                         pos->lp_oit_cookie = 0;
2927                 } else {
2928                         int i;
2929
2930                         lo->ll_status = LS_SCANNING_PHASE1;
2931                         lo->ll_run_time_phase1 = 0;
2932                         lo->ll_run_time_phase2 = 0;
2933                         lo->ll_objs_checked_phase1 = 0;
2934                         lo->ll_objs_checked_phase2 = 0;
2935                         lo->ll_objs_failed_phase1 = 0;
2936                         lo->ll_objs_failed_phase2 = 0;
2937                         for (i = 0; i < LLIT_MAX; i++)
2938                                 lo->ll_objs_repaired[i] = 0;
2939
2940                         pos->lp_oit_cookie = lo->ll_pos_first_inconsistent;
2941                 }
2942         } else {
2943                 lo->ll_status = LS_SCANNING_PHASE1;
2944                 if (!lfsck->li_drop_dryrun ||
2945                     lo->ll_pos_first_inconsistent == 0)
2946                         pos->lp_oit_cookie = lo->ll_pos_last_checkpoint + 1;
2947                 else
2948                         pos->lp_oit_cookie = lo->ll_pos_first_inconsistent;
2949         }
2950         spin_unlock(&lfsck->li_lock);
2951
2952         up_write(&com->lc_sem);
2953
2954         return 0;
2955 }
2956
2957 static int lfsck_layout_slave_prep(const struct lu_env *env,
2958                                    struct lfsck_component *com,
2959                                    struct lfsck_start_param *lsp)
2960 {
2961         struct lfsck_layout             *lo     = com->lc_file_ram;
2962         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
2963         int                              rc;
2964
2965         rc = lfsck_layout_prep(env, com);
2966         if (rc != 0 || lo->ll_status != LS_SCANNING_PHASE1 ||
2967             !lsp->lsp_index_valid)
2968                 return rc;
2969
2970         rc = lfsck_layout_llst_add(llsd, lsp->lsp_index);
2971         if (rc == 0 && !(lo->ll_flags & LF_INCOMPLETE)) {
2972                 LASSERT(!llsd->llsd_rbtree_valid);
2973
2974                 write_lock(&llsd->llsd_rb_lock);
2975                 rc = lfsck_rbtree_setup(env, com);
2976                 write_unlock(&llsd->llsd_rb_lock);
2977         }
2978
2979         return rc;
2980 }
2981
2982 static int lfsck_layout_master_prep(const struct lu_env *env,
2983                                     struct lfsck_component *com,
2984                                     struct lfsck_start_param *lsp)
2985 {
2986         struct lfsck_instance           *lfsck   = com->lc_lfsck;
2987         struct lfsck_layout_master_data *llmd    = com->lc_data;
2988         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
2989         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
2990         struct lfsck_thread_args        *lta;
2991         long                             rc;
2992         ENTRY;
2993
2994         rc = lfsck_layout_prep(env, com);
2995         if (rc != 0)
2996                 RETURN(rc);
2997
2998         llmd->llmd_assistant_status = 0;
2999         llmd->llmd_post_result = 0;
3000         llmd->llmd_to_post = 0;
3001         llmd->llmd_to_double_scan = 0;
3002         llmd->llmd_in_double_scan = 0;
3003         llmd->llmd_exit = 0;
3004         thread_set_flags(athread, 0);
3005
3006         lta = lfsck_thread_args_init(lfsck, com, lsp);
3007         if (IS_ERR(lta))
3008                 RETURN(PTR_ERR(lta));
3009
3010         rc = PTR_ERR(kthread_run(lfsck_layout_assistant, lta, "lfsck_layout"));
3011         if (IS_ERR_VALUE(rc)) {
3012                 CERROR("%s: Cannot start LFSCK layout assistant thread: "
3013                        "rc = %ld\n", lfsck_lfsck2name(lfsck), rc);
3014                 lfsck_thread_args_fini(lta);
3015         } else {
3016                 struct l_wait_info lwi = { 0 };
3017
3018                 l_wait_event(mthread->t_ctl_waitq,
3019                              thread_is_running(athread) ||
3020                              thread_is_stopped(athread),
3021                              &lwi);
3022                 if (unlikely(!thread_is_running(athread)))
3023                         rc = llmd->llmd_assistant_status;
3024                 else
3025                         rc = 0;
3026         }
3027
3028         RETURN(rc);
3029 }
3030
3031 /* Pre-fetch the attribute for each stripe in the given layout EA. */
3032 static int lfsck_layout_scan_stripes(const struct lu_env *env,
3033                                      struct lfsck_component *com,
3034                                      struct dt_object *parent,
3035                                      struct lov_mds_md_v1 *lmm)
3036 {
3037         struct lfsck_thread_info        *info    = lfsck_env_info(env);
3038         struct lfsck_instance           *lfsck   = com->lc_lfsck;
3039         struct lfsck_bookmark           *bk      = &lfsck->li_bookmark_ram;
3040         struct lfsck_layout             *lo      = com->lc_file_ram;
3041         struct lfsck_layout_master_data *llmd    = com->lc_data;
3042         struct lfsck_layout_object      *llo     = NULL;
3043         struct lov_ost_data_v1          *objs;
3044         struct lfsck_tgt_descs          *ltds    = &lfsck->li_ost_descs;
3045         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
3046         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
3047                 struct l_wait_info       lwi     = { 0 };
3048         struct lu_buf                   *buf;
3049         int                              rc      = 0;
3050         int                              i;
3051         __u32                            magic;
3052         __u16                            count;
3053         __u16                            gen;
3054         ENTRY;
3055
3056         buf = lfsck_buf_get(env, &info->lti_old_pfid,
3057                             sizeof(struct filter_fid_old));
3058         count = le16_to_cpu(lmm->lmm_stripe_count);
3059         gen = le16_to_cpu(lmm->lmm_layout_gen);
3060         /* Currently, we only support LOV_MAGIC_V1/LOV_MAGIC_V3 which has
3061          * been verified in lfsck_layout_verify_header() already. If some
3062          * new magic introduced in the future, then layout LFSCK needs to
3063          * be updated also. */
3064         magic = le32_to_cpu(lmm->lmm_magic);
3065         if (magic == LOV_MAGIC_V1) {
3066                 objs = &(lmm->lmm_objects[0]);
3067         } else {
3068                 LASSERT(magic == LOV_MAGIC_V3);
3069                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
3070         }
3071
3072         for (i = 0; i < count; i++, objs++) {
3073                 struct lu_fid           *fid    = &info->lti_fid;
3074                 struct ost_id           *oi     = &info->lti_oi;
3075                 struct lfsck_layout_req *llr;
3076                 struct lfsck_tgt_desc   *tgt    = NULL;
3077                 struct dt_object        *cobj   = NULL;
3078                 __u32                    index  =
3079                                         le32_to_cpu(objs->l_ost_idx);
3080                 bool                     wakeup = false;
3081
3082                 l_wait_event(mthread->t_ctl_waitq,
3083                              bk->lb_async_windows == 0 ||
3084                              llmd->llmd_prefetched < bk->lb_async_windows ||
3085                              !thread_is_running(mthread) ||
3086                              thread_is_stopped(athread),
3087                              &lwi);
3088
3089                 if (unlikely(!thread_is_running(mthread)) ||
3090                              thread_is_stopped(athread))
3091                         GOTO(out, rc = 0);
3092
3093                 ostid_le_to_cpu(&objs->l_ost_oi, oi);
3094                 ostid_to_fid(fid, oi, index);
3095                 tgt = lfsck_tgt_get(ltds, index);
3096                 if (unlikely(tgt == NULL)) {
3097                         lo->ll_flags |= LF_INCOMPLETE;
3098                         goto next;
3099                 }
3100
3101                 cobj = lfsck_object_find_by_dev(env, tgt->ltd_tgt, fid);
3102                 if (IS_ERR(cobj)) {
3103                         rc = PTR_ERR(cobj);
3104                         goto next;
3105                 }
3106
3107                 rc = dt_declare_attr_get(env, cobj, BYPASS_CAPA);
3108                 if (rc != 0)
3109                         goto next;
3110
3111                 rc = dt_declare_xattr_get(env, cobj, buf, XATTR_NAME_FID,
3112                                           BYPASS_CAPA);
3113                 if (rc != 0)
3114                         goto next;
3115
3116                 if (llo == NULL) {
3117                         llo = lfsck_layout_object_init(env, parent, gen);
3118                         if (IS_ERR(llo)) {
3119                                 rc = PTR_ERR(llo);
3120                                 goto next;
3121                         }
3122                 }
3123
3124                 llr = lfsck_layout_req_init(llo, cobj, index, i);
3125                 if (IS_ERR(llr)) {
3126                         rc = PTR_ERR(llr);
3127                         goto next;
3128                 }
3129
3130                 cobj = NULL;
3131                 spin_lock(&llmd->llmd_lock);
3132                 if (llmd->llmd_assistant_status < 0) {
3133                         spin_unlock(&llmd->llmd_lock);
3134                         lfsck_layout_req_fini(env, llr);
3135                         lfsck_tgt_put(tgt);
3136                         RETURN(llmd->llmd_assistant_status);
3137                 }
3138
3139                 list_add_tail(&llr->llr_list, &llmd->llmd_req_list);
3140                 if (llmd->llmd_prefetched == 0)
3141                         wakeup = true;
3142
3143                 llmd->llmd_prefetched++;
3144                 spin_unlock(&llmd->llmd_lock);
3145                 if (wakeup)
3146                         wake_up_all(&athread->t_ctl_waitq);
3147
3148 next:
3149                 down_write(&com->lc_sem);
3150                 com->lc_new_checked++;
3151                 if (rc < 0)
3152                         lo->ll_objs_failed_phase1++;
3153                 up_write(&com->lc_sem);
3154
3155                 if (cobj != NULL && !IS_ERR(cobj))
3156                         lu_object_put(env, &cobj->do_lu);
3157
3158                 if (likely(tgt != NULL))
3159                         lfsck_tgt_put(tgt);
3160
3161                 if (rc < 0 && bk->lb_param & LPF_FAILOUT)
3162                         GOTO(out, rc);
3163         }
3164
3165         GOTO(out, rc = 0);
3166
3167 out:
3168         if (llo != NULL && !IS_ERR(llo))
3169                 lfsck_layout_object_put(env, llo);
3170
3171         return rc;
3172 }
3173
3174 /* For the given object, read its layout EA locally. For each stripe, pre-fetch
3175  * the OST-object's attribute and generate an structure lfsck_layout_req on the
3176  * list ::llmd_req_list.
3177  *
3178  * For each request on above list, the lfsck_layout_assistant thread compares
3179  * the OST side attribute with local attribute, if inconsistent, then repair it.
3180  *
3181  * All above processing is async mode with pipeline. */
3182 static int lfsck_layout_master_exec_oit(const struct lu_env *env,
3183                                         struct lfsck_component *com,
3184                                         struct dt_object *obj)
3185 {
3186         struct lfsck_thread_info        *info   = lfsck_env_info(env);
3187         struct ost_id                   *oi     = &info->lti_oi;
3188         struct lfsck_layout             *lo     = com->lc_file_ram;
3189         struct lfsck_layout_master_data *llmd   = com->lc_data;
3190         struct lfsck_instance           *lfsck  = com->lc_lfsck;
3191         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
3192         struct thandle                  *handle = NULL;
3193         struct lu_buf                   *buf    = &info->lti_big_buf;
3194         struct lov_mds_md_v1            *lmm    = NULL;
3195         struct dt_device                *dev    = lfsck->li_bottom;
3196         struct lustre_handle             lh     = { 0 };
3197         ssize_t                          buflen = buf->lb_len;
3198         int                              rc     = 0;
3199         bool                             locked = false;
3200         bool                             stripe = false;
3201         ENTRY;
3202
3203         if (!S_ISREG(lfsck_object_type(obj)))
3204                 GOTO(out, rc = 0);
3205
3206         if (llmd->llmd_assistant_status < 0)
3207                 GOTO(out, rc = -ESRCH);
3208
3209         fid_to_lmm_oi(lfsck_dto2fid(obj), oi);
3210         lmm_oi_cpu_to_le(oi, oi);
3211         dt_read_lock(env, obj, 0);
3212         locked = true;
3213
3214 again:
3215         rc = lfsck_layout_get_lovea(env, obj, buf, &buflen);
3216         if (rc <= 0)
3217                 GOTO(out, rc);
3218
3219         buf->lb_len = rc;
3220         lmm = buf->lb_buf;
3221         rc = lfsck_layout_verify_header(lmm);
3222         if (rc != 0)
3223                 GOTO(out, rc);
3224
3225         if (memcmp(oi, &lmm->lmm_oi, sizeof(*oi)) == 0)
3226                 GOTO(out, stripe = true);
3227
3228         /* Inconsistent lmm_oi, should be repaired. */
3229         CDEBUG(D_LFSCK, "Repair bad lmm_oi for "DFID"\n",
3230                PFID(lfsck_dto2fid(obj)));
3231
3232         if (bk->lb_param & LPF_DRYRUN) {
3233                 down_write(&com->lc_sem);
3234                 lo->ll_objs_repaired[LLIT_OTHERS - 1]++;
3235                 up_write(&com->lc_sem);
3236
3237                 GOTO(out, stripe = true);
3238         }
3239
3240         if (!lustre_handle_is_used(&lh)) {
3241                 dt_read_unlock(env, obj);
3242                 locked = false;
3243                 buf->lb_len = buflen;
3244                 rc = lfsck_layout_lock(env, com, obj, &lh,
3245                                        MDS_INODELOCK_LAYOUT |
3246                                        MDS_INODELOCK_XATTR);
3247                 if (rc != 0)
3248                         GOTO(out, rc);
3249
3250                 handle = dt_trans_create(env, dev);
3251                 if (IS_ERR(handle))
3252                         GOTO(out, rc = PTR_ERR(handle));
3253
3254                 rc = dt_declare_xattr_set(env, obj, buf, XATTR_NAME_LOV,
3255                                           LU_XATTR_REPLACE, handle);
3256                 if (rc != 0)
3257                         GOTO(out, rc);
3258
3259                 rc = dt_trans_start_local(env, dev, handle);
3260                 if (rc != 0)
3261                         GOTO(out, rc);
3262
3263                 dt_write_lock(env, obj, 0);
3264                 locked = true;
3265
3266                 goto again;
3267         }
3268
3269         lmm->lmm_oi = *oi;
3270         rc = dt_xattr_set(env, obj, buf, XATTR_NAME_LOV,
3271                           LU_XATTR_REPLACE, handle, BYPASS_CAPA);
3272         if (rc != 0)
3273                 GOTO(out, rc);
3274
3275         down_write(&com->lc_sem);
3276         lo->ll_objs_repaired[LLIT_OTHERS - 1]++;
3277         up_write(&com->lc_sem);
3278
3279         GOTO(out, stripe = true);
3280
3281 out:
3282         if (locked) {
3283                 if (lustre_handle_is_used(&lh))
3284                         dt_write_unlock(env, obj);
3285                 else
3286                         dt_read_unlock(env, obj);
3287         }
3288
3289         if (handle != NULL && !IS_ERR(handle))
3290                 dt_trans_stop(env, dev, handle);
3291
3292         lfsck_layout_unlock(&lh);
3293         if (stripe) {
3294                 rc = lfsck_layout_scan_stripes(env, com, obj, lmm);
3295         } else {
3296                 down_write(&com->lc_sem);
3297                 com->lc_new_checked++;
3298                 if (rc < 0)
3299                         lo->ll_objs_failed_phase1++;
3300                 up_write(&com->lc_sem);
3301         }
3302         buf->lb_len = buflen;
3303
3304         return rc;
3305 }
3306
3307 static int lfsck_layout_slave_exec_oit(const struct lu_env *env,
3308                                        struct lfsck_component *com,
3309                                        struct dt_object *obj)
3310 {
3311         struct lfsck_instance           *lfsck  = com->lc_lfsck;
3312         struct lfsck_layout             *lo     = com->lc_file_ram;
3313         const struct lu_fid             *fid    = lfsck_dto2fid(obj);
3314         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
3315         struct lfsck_layout_seq         *lls;
3316         __u64                            seq;
3317         __u64                            oid;
3318         int                              rc;
3319         ENTRY;
3320
3321         LASSERT(llsd != NULL);
3322
3323         lfsck_rbtree_update_bitmap(env, com, fid, false);
3324
3325         down_write(&com->lc_sem);
3326         if (fid_is_idif(fid))
3327                 seq = 0;
3328         else if (!fid_is_norm(fid) ||
3329                  !fid_is_for_ostobj(env, lfsck->li_next, obj, fid))
3330                 GOTO(unlock, rc = 0);
3331         else
3332                 seq = fid_seq(fid);
3333         com->lc_new_checked++;
3334
3335         lls = lfsck_layout_seq_lookup(llsd, seq);
3336         if (lls == NULL) {
3337                 OBD_ALLOC_PTR(lls);
3338                 if (unlikely(lls == NULL))
3339                         GOTO(unlock, rc = -ENOMEM);
3340
3341                 INIT_LIST_HEAD(&lls->lls_list);
3342                 lls->lls_seq = seq;
3343                 rc = lfsck_layout_lastid_load(env, com, lls);
3344                 if (rc != 0) {
3345                         lo->ll_objs_failed_phase1++;
3346                         OBD_FREE_PTR(lls);
3347                         GOTO(unlock, rc);
3348                 }
3349
3350                 lfsck_layout_seq_insert(llsd, lls);
3351         }
3352
3353         if (unlikely(fid_is_last_id(fid)))
3354                 GOTO(unlock, rc = 0);
3355
3356         oid = fid_oid(fid);
3357         if (oid > lls->lls_lastid_known)
3358                 lls->lls_lastid_known = oid;
3359
3360         if (oid > lls->lls_lastid) {
3361                 if (!(lo->ll_flags & LF_CRASHED_LASTID)) {
3362                         /* OFD may create new objects during LFSCK scanning. */
3363                         rc = lfsck_layout_lastid_reload(env, com, lls);
3364                         if (unlikely(rc != 0))
3365                                 CWARN("%s: failed to reload LAST_ID for "LPX64
3366                                       ": rc = %d\n",
3367                                       lfsck_lfsck2name(com->lc_lfsck),
3368                                       lls->lls_seq, rc);
3369                         if (oid <= lls->lls_lastid)
3370                                 GOTO(unlock, rc = 0);
3371
3372                         LASSERT(lfsck->li_out_notify != NULL);
3373
3374                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
3375                                              LE_LASTID_REBUILDING);
3376                         lo->ll_flags |= LF_CRASHED_LASTID;
3377                 }
3378
3379                 lls->lls_lastid = oid;
3380                 lls->lls_dirty = 1;
3381         }
3382
3383         GOTO(unlock, rc = 0);
3384
3385 unlock:
3386         up_write(&com->lc_sem);
3387
3388         return rc;
3389 }
3390
3391 static int lfsck_layout_exec_dir(const struct lu_env *env,
3392                                  struct lfsck_component *com,
3393                                  struct dt_object *obj,
3394                                  struct lu_dirent *ent)
3395 {
3396         return 0;
3397 }
3398
3399 static int lfsck_layout_master_post(const struct lu_env *env,
3400                                     struct lfsck_component *com,
3401                                     int result, bool init)
3402 {
3403         struct lfsck_instance           *lfsck   = com->lc_lfsck;
3404         struct lfsck_layout             *lo      = com->lc_file_ram;
3405         struct lfsck_layout_master_data *llmd    = com->lc_data;
3406         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
3407         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
3408         struct l_wait_info               lwi     = { 0 };
3409         int                              rc;
3410         ENTRY;
3411
3412
3413         llmd->llmd_post_result = result;
3414         llmd->llmd_to_post = 1;
3415         if (llmd->llmd_post_result <= 0)
3416                 llmd->llmd_exit = 1;
3417
3418         wake_up_all(&athread->t_ctl_waitq);
3419         l_wait_event(mthread->t_ctl_waitq,
3420                      (result > 0 && list_empty(&llmd->llmd_req_list)) ||
3421                      thread_is_stopped(athread),
3422                      &lwi);
3423
3424         if (llmd->llmd_assistant_status < 0)
3425                 result = llmd->llmd_assistant_status;
3426
3427         down_write(&com->lc_sem);
3428         spin_lock(&lfsck->li_lock);
3429         /* When LFSCK failed, there may be some prefetched objects those are
3430          * not been processed yet, we do not know the exactly position, then
3431          * just restart from last check-point next time. */
3432         if (!init && !llmd->llmd_exit)
3433                 lo->ll_pos_last_checkpoint =
3434                                         lfsck->li_pos_current.lp_oit_cookie;
3435
3436         if (result > 0) {
3437                 lo->ll_status = LS_SCANNING_PHASE2;
3438                 lo->ll_flags |= LF_SCANNED_ONCE;
3439                 lo->ll_flags &= ~LF_UPGRADE;
3440                 list_del_init(&com->lc_link);
3441                 list_add_tail(&com->lc_link, &lfsck->li_list_double_scan);
3442         } else if (result == 0) {
3443                 lo->ll_status = lfsck->li_status;
3444                 if (lo->ll_status == 0)
3445                         lo->ll_status = LS_STOPPED;
3446                 if (lo->ll_status != LS_PAUSED) {
3447                         list_del_init(&com->lc_link);
3448                         list_add_tail(&com->lc_link, &lfsck->li_list_idle);
3449                 }
3450         } else {
3451                 lo->ll_status = LS_FAILED;
3452                 list_del_init(&com->lc_link);
3453                 list_add_tail(&com->lc_link, &lfsck->li_list_idle);
3454         }
3455         spin_unlock(&lfsck->li_lock);
3456
3457         if (!init) {
3458                 lo->ll_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
3459                                 HALF_SEC - lfsck->li_time_last_checkpoint);
3460                 lo->ll_time_last_checkpoint = cfs_time_current_sec();
3461                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
3462                 com->lc_new_checked = 0;
3463         }
3464
3465         rc = lfsck_layout_store(env, com);
3466         up_write(&com->lc_sem);
3467
3468         RETURN(rc);
3469 }
3470
3471 static int lfsck_layout_slave_post(const struct lu_env *env,
3472                                    struct lfsck_component *com,
3473                                    int result, bool init)
3474 {
3475         struct lfsck_instance   *lfsck = com->lc_lfsck;
3476         struct lfsck_layout     *lo    = com->lc_file_ram;
3477         int                      rc;
3478         bool                     done  = false;
3479
3480         rc = lfsck_layout_lastid_store(env, com);
3481         if (rc != 0)
3482                 result = rc;
3483
3484         LASSERT(lfsck->li_out_notify != NULL);
3485
3486         down_write(&com->lc_sem);
3487
3488         spin_lock(&lfsck->li_lock);
3489         if (!init)
3490                 lo->ll_pos_last_checkpoint =
3491                                         lfsck->li_pos_current.lp_oit_cookie;
3492         if (result > 0) {
3493                 lo->ll_status = LS_SCANNING_PHASE2;
3494                 lo->ll_flags |= LF_SCANNED_ONCE;
3495                 if (lo->ll_flags & LF_CRASHED_LASTID) {
3496                         done = true;
3497                         lo->ll_flags &= ~LF_CRASHED_LASTID;
3498                 }
3499                 lo->ll_flags &= ~LF_UPGRADE;
3500                 list_del_init(&com->lc_link);
3501                 list_add_tail(&com->lc_link, &lfsck->li_list_double_scan);
3502         } else if (result == 0) {
3503                 lo->ll_status = lfsck->li_status;
3504                 if (lo->ll_status == 0)
3505                         lo->ll_status = LS_STOPPED;
3506                 if (lo->ll_status != LS_PAUSED) {
3507                         list_del_init(&com->lc_link);
3508                         list_add_tail(&com->lc_link, &lfsck->li_list_idle);
3509                 }
3510         } else {
3511                 lo->ll_status = LS_FAILED;
3512                 list_del_init(&com->lc_link);
3513                 list_add_tail(&com->lc_link, &lfsck->li_list_idle);
3514         }
3515         spin_unlock(&lfsck->li_lock);
3516
3517         if (done)
3518                 lfsck->li_out_notify(env, lfsck->li_out_notify_data,
3519                                      LE_LASTID_REBUILT);
3520
3521         if (!init) {
3522                 lo->ll_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
3523                                 HALF_SEC - lfsck->li_time_last_checkpoint);
3524                 lo->ll_time_last_checkpoint = cfs_time_current_sec();
3525                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
3526                 com->lc_new_checked = 0;
3527         }
3528
3529         rc = lfsck_layout_store(env, com);
3530
3531         up_write(&com->lc_sem);
3532
3533         lfsck_layout_slave_notify_master(env, com, LE_PHASE1_DONE, result);
3534
3535         if (result <= 0)
3536                 lfsck_rbtree_cleanup(env, com);
3537
3538         return rc;
3539 }
3540
3541 static int lfsck_layout_dump(const struct lu_env *env,
3542                              struct lfsck_component *com, char *buf, int len)
3543 {
3544         struct lfsck_instance   *lfsck = com->lc_lfsck;
3545         struct lfsck_bookmark   *bk    = &lfsck->li_bookmark_ram;
3546         struct lfsck_layout     *lo    = com->lc_file_ram;
3547         int                      save  = len;
3548         int                      ret   = -ENOSPC;
3549         int                      rc;
3550
3551         down_read(&com->lc_sem);
3552         rc = snprintf(buf, len,
3553                       "name: lfsck_layout\n"
3554                       "magic: %#x\n"
3555                       "version: %d\n"
3556                       "status: %s\n",
3557                       lo->ll_magic,
3558                       bk->lb_version,
3559                       lfsck_status2names(lo->ll_status));
3560         if (rc <= 0)
3561                 goto out;
3562
3563         buf += rc;
3564         len -= rc;
3565         rc = lfsck_bits_dump(&buf, &len, lo->ll_flags, lfsck_flags_names,
3566                              "flags");
3567         if (rc < 0)
3568                 goto out;
3569
3570         rc = lfsck_bits_dump(&buf, &len, bk->lb_param, lfsck_param_names,
3571                              "param");
3572         if (rc < 0)
3573                 goto out;
3574
3575         rc = lfsck_time_dump(&buf, &len, lo->ll_time_last_complete,
3576                              "time_since_last_completed");
3577         if (rc < 0)
3578                 goto out;
3579
3580         rc = lfsck_time_dump(&buf, &len, lo->ll_time_latest_start,
3581                              "time_since_latest_start");
3582         if (rc < 0)
3583                 goto out;
3584
3585         rc = lfsck_time_dump(&buf, &len, lo->ll_time_last_checkpoint,
3586                              "time_since_last_checkpoint");
3587         if (rc < 0)
3588                 goto out;
3589
3590         rc = snprintf(buf, len,
3591                       "latest_start_position: "LPU64"\n"
3592                       "last_checkpoint_position: "LPU64"\n"
3593                       "first_failure_position: "LPU64"\n",
3594                       lo->ll_pos_latest_start,
3595                       lo->ll_pos_last_checkpoint,
3596                       lo->ll_pos_first_inconsistent);
3597         if (rc <= 0)
3598                 goto out;
3599
3600         buf += rc;
3601         len -= rc;
3602
3603         rc = snprintf(buf, len,
3604                       "success_count: %u\n"
3605                       "repaired_dangling: "LPU64"\n"
3606                       "repaired_unmatched_pair: "LPU64"\n"
3607                       "repaired_multiple_referenced: "LPU64"\n"
3608                       "repaired_orphan: "LPU64"\n"
3609                       "repaired_inconsistent_owner: "LPU64"\n"
3610                       "repaired_others: "LPU64"\n"
3611                       "skipped: "LPU64"\n"
3612                       "failed_phase1: "LPU64"\n"
3613                       "failed_phase2: "LPU64"\n",
3614                       lo->ll_success_count,
3615                       lo->ll_objs_repaired[LLIT_DANGLING - 1],
3616                       lo->ll_objs_repaired[LLIT_UNMATCHED_PAIR - 1],
3617                       lo->ll_objs_repaired[LLIT_MULTIPLE_REFERENCED - 1],
3618                       lo->ll_objs_repaired[LLIT_ORPHAN - 1],
3619                       lo->ll_objs_repaired[LLIT_INCONSISTENT_OWNER - 1],
3620                       lo->ll_objs_repaired[LLIT_OTHERS - 1],
3621                       lo->ll_objs_skipped,
3622                       lo->ll_objs_failed_phase1,
3623                       lo->ll_objs_failed_phase2);
3624         if (rc <= 0)
3625                 goto out;
3626
3627         buf += rc;
3628         len -= rc;
3629
3630         if (lo->ll_status == LS_SCANNING_PHASE1) {
3631                 __u64 pos;
3632                 const struct dt_it_ops *iops;
3633                 cfs_duration_t duration = cfs_time_current() -
3634                                           lfsck->li_time_last_checkpoint;
3635                 __u64 checked = lo->ll_objs_checked_phase1 + com->lc_new_checked;
3636                 __u64 speed = checked;
3637                 __u64 new_checked = com->lc_new_checked * HZ;
3638                 __u32 rtime = lo->ll_run_time_phase1 +
3639                               cfs_duration_sec(duration + HALF_SEC);
3640
3641                 if (duration != 0)
3642                         do_div(new_checked, duration);
3643                 if (rtime != 0)
3644                         do_div(speed, rtime);
3645                 rc = snprintf(buf, len,
3646                               "checked_phase1: "LPU64"\n"
3647                               "checked_phase2: "LPU64"\n"
3648                               "run_time_phase1: %u seconds\n"
3649                               "run_time_phase2: %u seconds\n"
3650                               "average_speed_phase1: "LPU64" items/sec\n"
3651                               "average_speed_phase2: N/A\n"
3652                               "real-time_speed_phase1: "LPU64" items/sec\n"
3653                               "real-time_speed_phase2: N/A\n",
3654                               checked,
3655                               lo->ll_objs_checked_phase2,
3656                               rtime,
3657                               lo->ll_run_time_phase2,
3658                               speed,
3659                               new_checked);
3660                 if (rc <= 0)
3661                         goto out;
3662
3663                 buf += rc;
3664                 len -= rc;
3665
3666                 LASSERT(lfsck->li_di_oit != NULL);
3667
3668                 iops = &lfsck->li_obj_oit->do_index_ops->dio_it;
3669
3670                 /* The low layer otable-based iteration position may NOT
3671                  * exactly match the layout-based directory traversal
3672                  * cookie. Generally, it is not a serious issue. But the
3673                  * caller should NOT make assumption on that. */
3674                 pos = iops->store(env, lfsck->li_di_oit);
3675                 if (!lfsck->li_current_oit_processed)
3676                         pos--;
3677                 rc = snprintf(buf, len, "current_position: "LPU64"\n", pos);
3678                 if (rc <= 0)
3679                         goto out;
3680
3681                 buf += rc;
3682                 len -= rc;
3683         } else {
3684                 /* XXX: LS_SCANNING_PHASE2 will be handled in the future. */
3685                 __u64 speed1 = lo->ll_objs_checked_phase1;
3686                 __u64 speed2 = lo->ll_objs_checked_phase2;
3687
3688                 if (lo->ll_run_time_phase1 != 0)
3689                         do_div(speed1, lo->ll_run_time_phase1);
3690                 if (lo->ll_run_time_phase2 != 0)
3691                         do_div(speed2, lo->ll_run_time_phase2);
3692                 rc = snprintf(buf, len,
3693                               "checked_phase1: "LPU64"\n"
3694                               "checked_phase2: "LPU64"\n"
3695                               "run_time_phase1: %u seconds\n"
3696                               "run_time_phase2: %u seconds\n"
3697                               "average_speed_phase1: "LPU64" items/sec\n"
3698                               "average_speed_phase2: "LPU64" objs/sec\n"
3699                               "real-time_speed_phase1: N/A\n"
3700                               "real-time_speed_phase2: N/A\n"
3701                               "current_position: N/A\n",
3702                               lo->ll_objs_checked_phase1,
3703                               lo->ll_objs_checked_phase2,
3704                               lo->ll_run_time_phase1,
3705                               lo->ll_run_time_phase2,
3706                               speed1,
3707                               speed2);
3708                 if (rc <= 0)
3709                         goto out;
3710
3711                 buf += rc;
3712                 len -= rc;
3713         }
3714         ret = save - len;
3715
3716 out:
3717         up_read(&com->lc_sem);
3718
3719         return ret;
3720 }
3721
3722 static int lfsck_layout_master_double_scan(const struct lu_env *env,
3723                                            struct lfsck_component *com)
3724 {
3725         struct lfsck_layout_master_data *llmd    = com->lc_data;
3726         struct ptlrpc_thread            *mthread = &com->lc_lfsck->li_thread;
3727         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
3728         struct lfsck_layout             *lo      = com->lc_file_ram;
3729         struct l_wait_info               lwi     = { 0 };
3730
3731         if (unlikely(lo->ll_status != LS_SCANNING_PHASE2))
3732                 return 0;
3733
3734         llmd->llmd_to_double_scan = 1;
3735         wake_up_all(&athread->t_ctl_waitq);
3736         l_wait_event(mthread->t_ctl_waitq,
3737                      llmd->llmd_in_double_scan ||
3738                      thread_is_stopped(athread),
3739                      &lwi);
3740         if (llmd->llmd_assistant_status < 0)
3741                 return llmd->llmd_assistant_status;
3742
3743         return 0;
3744 }
3745
3746 static int lfsck_layout_slave_double_scan(const struct lu_env *env,
3747                                           struct lfsck_component *com)
3748 {
3749         struct lfsck_instance           *lfsck  = com->lc_lfsck;
3750         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
3751         struct lfsck_layout             *lo     = com->lc_file_ram;
3752         struct ptlrpc_thread            *thread = &lfsck->li_thread;
3753         int                              rc;
3754         ENTRY;
3755
3756         if (unlikely(lo->ll_status != LS_SCANNING_PHASE2)) {
3757                 lfsck_rbtree_cleanup(env, com);
3758                 RETURN(0);
3759         }
3760
3761         atomic_inc(&lfsck->li_double_scan_count);
3762
3763         com->lc_new_checked = 0;
3764         com->lc_new_scanned = 0;
3765         com->lc_time_last_checkpoint = cfs_time_current();
3766         com->lc_time_next_checkpoint = com->lc_time_last_checkpoint +
3767                                 cfs_time_seconds(LFSCK_CHECKPOINT_INTERVAL);
3768
3769         while (1) {
3770                 struct l_wait_info lwi = LWI_TIMEOUT(cfs_time_seconds(30),
3771                                                      NULL, NULL);
3772
3773                 rc = lfsck_layout_slave_query_master(env, com);
3774                 if (list_empty(&llsd->llsd_master_list)) {
3775                         if (unlikely(!thread_is_running(thread)))
3776                                 rc = 0;
3777                         else
3778                                 rc = 1;
3779
3780                         GOTO(done, rc);
3781                 }
3782
3783                 if (rc < 0)
3784                         GOTO(done, rc);
3785
3786                 rc = l_wait_event(thread->t_ctl_waitq,
3787                                   !thread_is_running(thread) ||
3788                                   list_empty(&llsd->llsd_master_list),
3789                                   &lwi);
3790                 if (unlikely(!thread_is_running(thread)))
3791                         GOTO(done, rc = 0);
3792
3793                 if (rc == -ETIMEDOUT)
3794                         continue;
3795
3796                 GOTO(done, rc = (rc < 0 ? rc : 1));
3797         }
3798
3799 done:
3800         rc = lfsck_layout_double_scan_result(env, com, rc);
3801
3802         lfsck_rbtree_cleanup(env, com);
3803         if (atomic_dec_and_test(&lfsck->li_double_scan_count))
3804                 wake_up_all(&lfsck->li_thread.t_ctl_waitq);
3805
3806         return rc;
3807 }
3808
3809 static void lfsck_layout_master_data_release(const struct lu_env *env,
3810                                              struct lfsck_component *com)
3811 {
3812         struct lfsck_layout_master_data *llmd   = com->lc_data;
3813         struct lfsck_instance           *lfsck  = com->lc_lfsck;
3814         struct lfsck_tgt_descs          *ltds;
3815         struct lfsck_tgt_desc           *ltd;
3816         struct lfsck_tgt_desc           *next;
3817
3818         LASSERT(llmd != NULL);
3819         LASSERT(thread_is_init(&llmd->llmd_thread) ||
3820                 thread_is_stopped(&llmd->llmd_thread));
3821         LASSERT(list_empty(&llmd->llmd_req_list));
3822
3823         com->lc_data = NULL;
3824
3825         ltds = &lfsck->li_ost_descs;
3826         spin_lock(&ltds->ltd_lock);
3827         list_for_each_entry_safe(ltd, next, &llmd->llmd_ost_phase1_list,
3828                                  ltd_layout_phase_list) {
3829                 list_del_init(&ltd->ltd_layout_phase_list);
3830         }
3831         list_for_each_entry_safe(ltd, next, &llmd->llmd_ost_phase2_list,
3832                                  ltd_layout_phase_list) {
3833                 list_del_init(&ltd->ltd_layout_phase_list);
3834         }
3835         list_for_each_entry_safe(ltd, next, &llmd->llmd_ost_list,
3836                                  ltd_layout_list) {
3837                 list_del_init(&ltd->ltd_layout_list);
3838         }
3839         list_for_each_entry_safe(ltd, next, &llmd->llmd_mdt_phase1_list,
3840                                  ltd_layout_phase_list) {
3841                 list_del_init(&ltd->ltd_layout_phase_list);
3842         }
3843         list_for_each_entry_safe(ltd, next, &llmd->llmd_mdt_phase2_list,
3844                                  ltd_layout_phase_list) {
3845                 list_del_init(&ltd->ltd_layout_phase_list);
3846         }
3847         list_for_each_entry_safe(ltd, next, &llmd->llmd_mdt_list,
3848                                  ltd_layout_list) {
3849                 list_del_init(&ltd->ltd_layout_list);
3850         }
3851         spin_unlock(&ltds->ltd_lock);
3852
3853         OBD_FREE_PTR(llmd);
3854 }
3855
3856 static void lfsck_layout_slave_data_release(const struct lu_env *env,
3857                                             struct lfsck_component *com)
3858 {
3859         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
3860         struct lfsck_layout_seq          *lls;
3861         struct lfsck_layout_seq          *next;
3862         struct lfsck_layout_slave_target *llst;
3863         struct lfsck_layout_slave_target *tmp;
3864
3865         LASSERT(llsd != NULL);
3866
3867         list_for_each_entry_safe(lls, next, &llsd->llsd_seq_list,
3868                                      lls_list) {
3869                 list_del_init(&lls->lls_list);
3870                 lfsck_object_put(env, lls->lls_lastid_obj);
3871                 OBD_FREE_PTR(lls);
3872         }
3873
3874         list_for_each_entry_safe(llst, tmp, &llsd->llsd_master_list,
3875                                  llst_list) {
3876                 list_del_init(&llst->llst_list);
3877                 OBD_FREE_PTR(llst);
3878         }
3879
3880         lfsck_rbtree_cleanup(env, com);
3881         com->lc_data = NULL;
3882         OBD_FREE_PTR(llsd);
3883 }
3884
3885 static void lfsck_layout_master_quit(const struct lu_env *env,
3886                                      struct lfsck_component *com)
3887 {
3888         struct lfsck_layout_master_data *llmd    = com->lc_data;
3889         struct ptlrpc_thread            *mthread = &com->lc_lfsck->li_thread;
3890         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
3891         struct l_wait_info               lwi     = { 0 };
3892
3893         llmd->llmd_exit = 1;
3894         wake_up_all(&athread->t_ctl_waitq);
3895         l_wait_event(mthread->t_ctl_waitq,
3896                      thread_is_init(athread) ||
3897                      thread_is_stopped(athread),
3898                      &lwi);
3899 }
3900
3901 static void lfsck_layout_slave_quit(const struct lu_env *env,
3902                                     struct lfsck_component *com)
3903 {
3904         lfsck_rbtree_cleanup(env, com);
3905 }
3906
3907 static int lfsck_layout_master_in_notify(const struct lu_env *env,
3908                                          struct lfsck_component *com,
3909                                          struct lfsck_request *lr)
3910 {
3911         struct lfsck_instance           *lfsck = com->lc_lfsck;
3912         struct lfsck_layout             *lo    = com->lc_file_ram;
3913         struct lfsck_layout_master_data *llmd  = com->lc_data;
3914         struct lfsck_tgt_descs          *ltds;
3915         struct lfsck_tgt_desc           *ltd;
3916         ENTRY;
3917
3918         if (lr->lr_event != LE_PHASE1_DONE &&
3919             lr->lr_event != LE_PHASE2_DONE &&
3920             lr->lr_event != LE_STOP)
3921                 RETURN(-EINVAL);
3922
3923         if (lr->lr_flags & LEF_FROM_OST)
3924                 ltds = &lfsck->li_ost_descs;
3925         else
3926                 ltds = &lfsck->li_mdt_descs;
3927         spin_lock(&ltds->ltd_lock);
3928         ltd = LTD_TGT(ltds, lr->lr_index);
3929         if (ltd == NULL) {
3930                 spin_unlock(&ltds->ltd_lock);
3931
3932                 RETURN(-ENODEV);
3933         }
3934
3935         list_del_init(&ltd->ltd_layout_phase_list);
3936         switch (lr->lr_event) {
3937         case LE_PHASE1_DONE:
3938                 if (lr->lr_status <= 0) {
3939                         ltd->ltd_layout_done = 1;
3940                         list_del_init(&ltd->ltd_layout_list);
3941                         lo->ll_flags |= LF_INCOMPLETE;
3942                         break;
3943                 }
3944
3945                 if (lr->lr_flags & LEF_FROM_OST) {
3946                         if (list_empty(&ltd->ltd_layout_list))
3947                                 list_add_tail(&ltd->ltd_layout_list,
3948                                               &llmd->llmd_ost_list);
3949                         list_add_tail(&ltd->ltd_layout_phase_list,
3950                                       &llmd->llmd_ost_phase2_list);
3951                 } else {
3952                         if (list_empty(&ltd->ltd_layout_list))
3953                                 list_add_tail(&ltd->ltd_layout_list,
3954                                               &llmd->llmd_mdt_list);
3955                         list_add_tail(&ltd->ltd_layout_phase_list,
3956                                       &llmd->llmd_mdt_phase2_list);
3957                 }
3958                 break;
3959         case LE_PHASE2_DONE:
3960                 ltd->ltd_layout_done = 1;
3961                 list_del_init(&ltd->ltd_layout_list);
3962                 break;
3963         case LE_STOP:
3964                 ltd->ltd_layout_done = 1;
3965                 list_del_init(&ltd->ltd_layout_list);
3966                 if (!(lr->lr_flags & LEF_FORCE_STOP))
3967                         lo->ll_flags |= LF_INCOMPLETE;
3968                 break;
3969         default:
3970                 break;
3971         }
3972         spin_unlock(&ltds->ltd_lock);
3973
3974         if (lr->lr_flags & LEF_FORCE_STOP) {
3975                 struct lfsck_stop *stop = &lfsck_env_info(env)->lti_stop;
3976
3977                 memset(stop, 0, sizeof(*stop));
3978                 stop->ls_status = lr->lr_status;
3979                 stop->ls_flags = lr->lr_param;
3980                 lfsck_stop(env, lfsck->li_bottom, stop);
3981         } else if (lfsck_layout_master_to_orphan(llmd)) {
3982                 wake_up_all(&llmd->llmd_thread.t_ctl_waitq);
3983         }
3984
3985         RETURN(0);
3986 }
3987
3988 static int lfsck_layout_slave_in_notify(const struct lu_env *env,
3989                                         struct lfsck_component *com,
3990                                         struct lfsck_request *lr)
3991 {
3992         struct lfsck_instance            *lfsck = com->lc_lfsck;
3993         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
3994         struct lfsck_layout_slave_target *llst;
3995         ENTRY;
3996
3997         if (lr->lr_event == LE_FID_ACCESSED) {
3998                 lfsck_rbtree_update_bitmap(env, com, &lr->lr_fid, true);
3999
4000                 RETURN(0);
4001         }
4002
4003         if (lr->lr_event != LE_PHASE2_DONE &&
4004             lr->lr_event != LE_STOP)
4005                 RETURN(-EINVAL);
4006
4007         llst = lfsck_layout_llst_find_and_del(llsd, lr->lr_index);
4008         if (llst == NULL)
4009                 RETURN(-ENODEV);
4010
4011         lfsck_layout_llst_put(llst);
4012         if (list_empty(&llsd->llsd_master_list)) {
4013                 switch (lr->lr_event) {
4014                 case LE_PHASE2_DONE:
4015                         wake_up_all(&lfsck->li_thread.t_ctl_waitq);
4016                         break;
4017                 case LE_STOP: {
4018                         struct lfsck_stop *stop = &lfsck_env_info(env)->lti_stop;
4019
4020                         memset(stop, 0, sizeof(*stop));
4021                         stop->ls_status = lr->lr_status;
4022                         stop->ls_flags = lr->lr_param;
4023                         lfsck_stop(env, lfsck->li_bottom, stop);
4024                         break;
4025                 }
4026                 default:
4027                         break;
4028                 }
4029         }
4030
4031         RETURN(0);
4032 }
4033
4034 static int lfsck_layout_query(const struct lu_env *env,
4035                               struct lfsck_component *com)
4036 {
4037         struct lfsck_layout *lo = com->lc_file_ram;
4038
4039         return lo->ll_status;
4040 }
4041
4042 static int lfsck_layout_master_stop_notify(const struct lu_env *env,
4043                                            struct lfsck_component *com,
4044                                            struct lfsck_tgt_descs *ltds,
4045                                            struct lfsck_tgt_desc *ltd,
4046                                            struct ptlrpc_request_set *set)
4047 {
4048         struct lfsck_thread_info          *info  = lfsck_env_info(env);
4049         struct lfsck_async_interpret_args *laia  = &info->lti_laia;
4050         struct lfsck_request              *lr    = &info->lti_lr;
4051         struct lfsck_instance             *lfsck = com->lc_lfsck;
4052         int                                rc;
4053
4054         LASSERT(list_empty(&ltd->ltd_layout_list));
4055         LASSERT(list_empty(&ltd->ltd_layout_phase_list));
4056
4057         memset(lr, 0, sizeof(*lr));
4058         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
4059         lr->lr_event = LE_STOP;
4060         lr->lr_active = LT_LAYOUT;
4061         if (ltds == &lfsck->li_ost_descs) {
4062                 lr->lr_flags = LEF_TO_OST;
4063         } else {
4064                 if (ltd->ltd_index == lfsck_dev_idx(lfsck->li_bottom))
4065                         return 0;
4066
4067                 lr->lr_flags = 0;
4068         }
4069         lr->lr_status = LS_CO_STOPPED;
4070
4071         laia->laia_com = com;
4072         laia->laia_ltds = ltds;
4073         laia->laia_ltd = ltd;
4074         laia->laia_lr = lr;
4075
4076         rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
4077                                  lfsck_layout_master_async_interpret,
4078                                  laia, LFSCK_NOTIFY);
4079         if (rc != 0)
4080                 CERROR("%s: Fail to notify %s %x for co-stop: rc = %d\n",
4081                        lfsck_lfsck2name(lfsck),
4082                        (lr->lr_flags & LEF_TO_OST) ? "OST" : "MDT",
4083                        ltd->ltd_index, rc);
4084
4085         return rc;
4086 }
4087
4088 /* with lfsck::li_lock held */
4089 static int lfsck_layout_slave_join(const struct lu_env *env,
4090                                    struct lfsck_component *com,
4091                                    struct lfsck_start_param *lsp)
4092 {
4093         struct lfsck_instance            *lfsck = com->lc_lfsck;
4094         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
4095         struct lfsck_layout_slave_target *llst;
4096         struct lfsck_start               *start = lsp->lsp_start;
4097         int                               rc    = 0;
4098         ENTRY;
4099
4100         if (!lsp->lsp_index_valid || start == NULL ||
4101             !(start->ls_flags & LPF_ALL_MDT))
4102                 RETURN(-EALREADY);
4103
4104         spin_unlock(&lfsck->li_lock);
4105         rc = lfsck_layout_llst_add(llsd, lsp->lsp_index);
4106         spin_lock(&lfsck->li_lock);
4107         if (rc == 0 && !thread_is_running(&lfsck->li_thread)) {
4108                 spin_unlock(&lfsck->li_lock);
4109                 llst = lfsck_layout_llst_find_and_del(llsd, lsp->lsp_index);
4110                 if (llst != NULL)
4111                         lfsck_layout_llst_put(llst);
4112                 spin_lock(&lfsck->li_lock);
4113                 rc = -EAGAIN;
4114         }
4115
4116         RETURN(rc);
4117 }
4118
4119 static struct lfsck_operations lfsck_layout_master_ops = {
4120         .lfsck_reset            = lfsck_layout_reset,
4121         .lfsck_fail             = lfsck_layout_fail,
4122         .lfsck_checkpoint       = lfsck_layout_master_checkpoint,
4123         .lfsck_prep             = lfsck_layout_master_prep,
4124         .lfsck_exec_oit         = lfsck_layout_master_exec_oit,
4125         .lfsck_exec_dir         = lfsck_layout_exec_dir,
4126         .lfsck_post             = lfsck_layout_master_post,
4127         .lfsck_dump             = lfsck_layout_dump,
4128         .lfsck_double_scan      = lfsck_layout_master_double_scan,
4129         .lfsck_data_release     = lfsck_layout_master_data_release,
4130         .lfsck_quit             = lfsck_layout_master_quit,
4131         .lfsck_in_notify        = lfsck_layout_master_in_notify,
4132         .lfsck_query            = lfsck_layout_query,
4133         .lfsck_stop_notify      = lfsck_layout_master_stop_notify,
4134 };
4135
4136 static struct lfsck_operations lfsck_layout_slave_ops = {
4137         .lfsck_reset            = lfsck_layout_reset,
4138         .lfsck_fail             = lfsck_layout_fail,
4139         .lfsck_checkpoint       = lfsck_layout_slave_checkpoint,
4140         .lfsck_prep             = lfsck_layout_slave_prep,
4141         .lfsck_exec_oit         = lfsck_layout_slave_exec_oit,
4142         .lfsck_exec_dir         = lfsck_layout_exec_dir,
4143         .lfsck_post             = lfsck_layout_slave_post,
4144         .lfsck_dump             = lfsck_layout_dump,
4145         .lfsck_double_scan      = lfsck_layout_slave_double_scan,
4146         .lfsck_data_release     = lfsck_layout_slave_data_release,
4147         .lfsck_quit             = lfsck_layout_slave_quit,
4148         .lfsck_in_notify        = lfsck_layout_slave_in_notify,
4149         .lfsck_query            = lfsck_layout_query,
4150         .lfsck_join             = lfsck_layout_slave_join,
4151 };
4152
4153 int lfsck_layout_setup(const struct lu_env *env, struct lfsck_instance *lfsck)
4154 {
4155         struct lfsck_component  *com;
4156         struct lfsck_layout     *lo;
4157         struct dt_object        *root = NULL;
4158         struct dt_object        *obj;
4159         int                      rc;
4160         ENTRY;
4161
4162         OBD_ALLOC_PTR(com);
4163         if (com == NULL)
4164                 RETURN(-ENOMEM);
4165
4166         INIT_LIST_HEAD(&com->lc_link);
4167         INIT_LIST_HEAD(&com->lc_link_dir);
4168         init_rwsem(&com->lc_sem);
4169         atomic_set(&com->lc_ref, 1);
4170         com->lc_lfsck = lfsck;
4171         com->lc_type = LT_LAYOUT;
4172         if (lfsck->li_master) {
4173                 struct lfsck_layout_master_data *llmd;
4174
4175                 com->lc_ops = &lfsck_layout_master_ops;
4176                 OBD_ALLOC_PTR(llmd);
4177                 if (llmd == NULL)
4178                         GOTO(out, rc = -ENOMEM);
4179
4180                 INIT_LIST_HEAD(&llmd->llmd_req_list);
4181                 spin_lock_init(&llmd->llmd_lock);
4182                 INIT_LIST_HEAD(&llmd->llmd_ost_list);
4183                 INIT_LIST_HEAD(&llmd->llmd_ost_phase1_list);
4184                 INIT_LIST_HEAD(&llmd->llmd_ost_phase2_list);
4185                 INIT_LIST_HEAD(&llmd->llmd_mdt_list);
4186                 INIT_LIST_HEAD(&llmd->llmd_mdt_phase1_list);
4187                 INIT_LIST_HEAD(&llmd->llmd_mdt_phase2_list);
4188                 init_waitqueue_head(&llmd->llmd_thread.t_ctl_waitq);
4189                 com->lc_data = llmd;
4190         } else {
4191                 struct lfsck_layout_slave_data *llsd;
4192
4193                 com->lc_ops = &lfsck_layout_slave_ops;
4194                 OBD_ALLOC_PTR(llsd);
4195                 if (llsd == NULL)
4196                         GOTO(out, rc = -ENOMEM);
4197
4198                 INIT_LIST_HEAD(&llsd->llsd_seq_list);
4199                 INIT_LIST_HEAD(&llsd->llsd_master_list);
4200                 spin_lock_init(&llsd->llsd_lock);
4201                 llsd->llsd_rb_root = RB_ROOT;
4202                 rwlock_init(&llsd->llsd_rb_lock);
4203                 com->lc_data = llsd;
4204         }
4205         com->lc_file_size = sizeof(*lo);
4206         OBD_ALLOC(com->lc_file_ram, com->lc_file_size);
4207         if (com->lc_file_ram == NULL)
4208                 GOTO(out, rc = -ENOMEM);
4209
4210         OBD_ALLOC(com->lc_file_disk, com->lc_file_size);
4211         if (com->lc_file_disk == NULL)
4212                 GOTO(out, rc = -ENOMEM);
4213
4214         root = dt_locate(env, lfsck->li_bottom, &lfsck->li_local_root_fid);
4215         if (IS_ERR(root))
4216                 GOTO(out, rc = PTR_ERR(root));
4217
4218         if (unlikely(!dt_try_as_dir(env, root)))
4219                 GOTO(out, rc = -ENOTDIR);
4220
4221         obj = local_file_find_or_create(env, lfsck->li_los, root,
4222                                         lfsck_layout_name,
4223                                         S_IFREG | S_IRUGO | S_IWUSR);
4224         if (IS_ERR(obj))
4225                 GOTO(out, rc = PTR_ERR(obj));
4226
4227         com->lc_obj = obj;
4228         rc = lfsck_layout_load(env, com);
4229         if (rc > 0)
4230                 rc = lfsck_layout_reset(env, com, true);
4231         else if (rc == -ENOENT)
4232                 rc = lfsck_layout_init(env, com);
4233
4234         if (rc != 0)
4235                 GOTO(out, rc);
4236
4237         lo = com->lc_file_ram;
4238         switch (lo->ll_status) {
4239         case LS_INIT:
4240         case LS_COMPLETED:
4241         case LS_FAILED:
4242         case LS_STOPPED:
4243         case LS_PARTIAL:
4244                 spin_lock(&lfsck->li_lock);
4245                 list_add_tail(&com->lc_link, &lfsck->li_list_idle);
4246                 spin_unlock(&lfsck->li_lock);
4247                 break;
4248         default:
4249                 CERROR("%s: unknown lfsck_layout status: rc = %u\n",
4250                        lfsck_lfsck2name(lfsck), lo->ll_status);
4251                 /* fall through */
4252         case LS_SCANNING_PHASE1:
4253         case LS_SCANNING_PHASE2:
4254                 /* No need to store the status to disk right now.
4255                  * If the system crashed before the status stored,
4256                  * it will be loaded back when next time. */
4257                 lo->ll_status = LS_CRASHED;
4258                 lo->ll_flags |= LF_INCOMPLETE;
4259                 /* fall through */
4260         case LS_PAUSED:
4261         case LS_CRASHED:
4262         case LS_CO_FAILED:
4263         case LS_CO_STOPPED:
4264         case LS_CO_PAUSED:
4265                 spin_lock(&lfsck->li_lock);
4266                 list_add_tail(&com->lc_link, &lfsck->li_list_scan);
4267                 spin_unlock(&lfsck->li_lock);
4268                 break;
4269         }
4270
4271         if (lo->ll_flags & LF_CRASHED_LASTID) {
4272                 LASSERT(lfsck->li_out_notify != NULL);
4273
4274                 lfsck->li_out_notify(env, lfsck->li_out_notify_data,
4275                                      LE_LASTID_REBUILDING);
4276         }
4277
4278         GOTO(out, rc = 0);
4279
4280 out:
4281         if (root != NULL && !IS_ERR(root))
4282                 lu_object_put(env, &root->do_lu);
4283
4284         if (rc != 0)
4285                 lfsck_component_cleanup(env, com);
4286
4287         return rc;
4288 }