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
  38 #include <lustre/lustre_idl.h>
  39 #include <lu_object.h>
  40 #include <dt_object.h>
  41 #include <lustre_linkea.h>
  42 #include <lustre_fid.h>
  43 #include <lustre_lib.h>
  44 #include <lustre_net.h>
  45 #include <lustre/lustre_user.h>
  46 #include <md_object.h>
  47 #include <obd_class.h>
  48
  49 #include "lfsck_internal.h"
  50
  51 #define LFSCK_LAYOUT_MAGIC              0xB173AE14
  52
  53 static const char lfsck_layout_name[] = "lfsck_layout";
  54
  55 struct lfsck_layout_seq {
  56         struct list_head         lls_list;
  57         __u64                    lls_seq;
  58         __u64                    lls_lastid;
  59         __u64                    lls_lastid_known;
  60         struct dt_object        *lls_lastid_obj;
  61         unsigned int             lls_dirty:1;
  62 };
  63
  64 struct lfsck_layout_slave_target {
  65         /* link into lfsck_layout_slave_data::llsd_master_list. */
  66         struct list_head        llst_list;
  67         __u64                   llst_gen;
  68         atomic_t                llst_ref;
  69         __u32                   llst_index;
  70 };
  71
  72 struct lfsck_layout_slave_data {
  73         /* list for lfsck_layout_seq */
  74         struct list_head         llsd_seq_list;
  75
  76         /* list for the masters involve layout verification. */
  77         struct list_head         llsd_master_list;
  78         spinlock_t               llsd_lock;
  79         __u64                    llsd_touch_gen;
  80 };
  81
  82 struct lfsck_layout_object {
  83         struct dt_object        *llo_obj;
  84         struct lu_attr           llo_attr;
  85         atomic_t                 llo_ref;
  86         __u16                    llo_gen;
  87 };
  88
  89 struct lfsck_layout_req {
  90         struct list_head                 llr_list;
  91         struct lfsck_layout_object      *llr_parent;
  92         struct dt_object                *llr_child;
  93         __u32                            llr_ost_idx;
  94         __u32                            llr_lov_idx; /* offset in LOV EA */
  95 };
  96
  97 struct lfsck_layout_master_data {
  98         spinlock_t              llmd_lock;
  99         struct list_head        llmd_req_list;
 100
 101         /* list for the ost targets involve layout verification. */
 102         struct list_head        llmd_ost_list;
 103
 104         /* list for the ost targets in phase1 scanning. */
 105         struct list_head        llmd_ost_phase1_list;
 106
 107         /* list for the ost targets in phase1 scanning. */
 108         struct list_head        llmd_ost_phase2_list;
 109
 110         /* list for the mdt targets involve layout verification. */
 111         struct list_head        llmd_mdt_list;
 112
 113         /* list for the mdt targets in phase1 scanning. */
 114         struct list_head        llmd_mdt_phase1_list;
 115
 116         /* list for the mdt targets in phase1 scanning. */
 117         struct list_head        llmd_mdt_phase2_list;
 118
 119         struct ptlrpc_thread    llmd_thread;
 120         __u32                   llmd_touch_gen;
 121         int                     llmd_prefetched;
 122         int                     llmd_assistant_status;
 123         int                     llmd_post_result;
 124         unsigned int            llmd_to_post:1,
 125                                 llmd_to_double_scan:1,
 126                                 llmd_in_double_scan:1,
 127                                 llmd_exit:1;
 128 };
 129
 130 struct lfsck_layout_slave_async_args {
 131         struct obd_export                *llsaa_exp;
 132         struct lfsck_component           *llsaa_com;
 133         struct lfsck_layout_slave_target *llsaa_llst;
 134 };
 135
 136 static struct lfsck_layout_object *
 137 lfsck_layout_object_init(const struct lu_env *env, struct dt_object *obj,
 138                          __u16 gen)
 139 {
 140         struct lfsck_layout_object *llo;
 141         int                         rc;
 142
 143         OBD_ALLOC_PTR(llo);
 144         if (llo == NULL)
 145                 return ERR_PTR(-ENOMEM);
 146
 147         rc = dt_attr_get(env, obj, &llo->llo_attr, BYPASS_CAPA);
 148         if (rc != 0) {
 149                 OBD_FREE_PTR(llo);
 150
 151                 return ERR_PTR(rc);
 152         }
 153
 154         lu_object_get(&obj->do_lu);
 155         llo->llo_obj = obj;
 156         /* The gen can be used to check whether some others have changed the
 157          * file layout after LFSCK pre-fetching but before real verification. */
 158         llo->llo_gen = gen;
 159         atomic_set(&llo->llo_ref, 1);
 160
 161         return llo;
 162 }
 163
 164 static inline void
 165 lfsck_layout_llst_put(struct lfsck_layout_slave_target *llst)
 166 {
 167         if (atomic_dec_and_test(&llst->llst_ref)) {
 168                 LASSERT(list_empty(&llst->llst_list));
 169
 170                 OBD_FREE_PTR(llst);
 171         }
 172 }
 173
 174 static inline int
 175 lfsck_layout_llst_add(struct lfsck_layout_slave_data *llsd, __u32 index)
 176 {
 177         struct lfsck_layout_slave_target *llst;
 178         struct lfsck_layout_slave_target *tmp;
 179         int                               rc   = 0;
 180
 181         OBD_ALLOC_PTR(llst);
 182         if (llst == NULL)
 183                 return -ENOMEM;
 184
 185         INIT_LIST_HEAD(&llst->llst_list);
 186         llst->llst_gen = 0;
 187         llst->llst_index = index;
 188         atomic_set(&llst->llst_ref, 1);
 189
 190         spin_lock(&llsd->llsd_lock);
 191         list_for_each_entry(tmp, &llsd->llsd_master_list, llst_list) {
 192                 if (tmp->llst_index == index) {
 193                         rc = -EALREADY;
 194                         break;
 195                 }
 196         }
 197         if (rc == 0)
 198                 list_add_tail(&llst->llst_list, &llsd->llsd_master_list);
 199         spin_unlock(&llsd->llsd_lock);
 200
 201         if (rc != 0)
 202                 OBD_FREE_PTR(llst);
 203
 204         return rc;
 205 }
 206
 207 static inline void
 208 lfsck_layout_llst_del(struct lfsck_layout_slave_data *llsd,
 209                       struct lfsck_layout_slave_target *llst)
 210 {
 211         bool del = false;
 212
 213         spin_lock(&llsd->llsd_lock);
 214         if (!list_empty(&llst->llst_list)) {
 215                 list_del_init(&llst->llst_list);
 216                 del = true;
 217         }
 218         spin_unlock(&llsd->llsd_lock);
 219
 220         if (del)
 221                 lfsck_layout_llst_put(llst);
 222 }
 223
 224 static inline struct lfsck_layout_slave_target *
 225 lfsck_layout_llst_find_and_del(struct lfsck_layout_slave_data *llsd,
 226                                __u32 index)
 227 {
 228         struct lfsck_layout_slave_target *llst;
 229
 230         spin_lock(&llsd->llsd_lock);
 231         list_for_each_entry(llst, &llsd->llsd_master_list, llst_list) {
 232                 if (llst->llst_index == index) {
 233                         list_del_init(&llst->llst_list);
 234                         spin_unlock(&llsd->llsd_lock);
 235
 236                         return llst;
 237                 }
 238         }
 239         spin_unlock(&llsd->llsd_lock);
 240
 241         return NULL;
 242 }
 243
 244 static inline void lfsck_layout_object_put(const struct lu_env *env,
 245                                            struct lfsck_layout_object *llo)
 246 {
 247         if (atomic_dec_and_test(&llo->llo_ref)) {
 248                 lfsck_object_put(env, llo->llo_obj);
 249                 OBD_FREE_PTR(llo);
 250         }
 251 }
 252
 253 static struct lfsck_layout_req *
 254 lfsck_layout_req_init(struct lfsck_layout_object *parent,
 255                       struct dt_object *child, __u32 ost_idx, __u32 lov_idx)
 256 {
 257         struct lfsck_layout_req *llr;
 258
 259         OBD_ALLOC_PTR(llr);
 260         if (llr == NULL)
 261                 return ERR_PTR(-ENOMEM);
 262
 263         INIT_LIST_HEAD(&llr->llr_list);
 264         atomic_inc(&parent->llo_ref);
 265         llr->llr_parent = parent;
 266         llr->llr_child = child;
 267         llr->llr_ost_idx = ost_idx;
 268         llr->llr_lov_idx = lov_idx;
 269
 270         return llr;
 271 }
 272
 273 static inline void lfsck_layout_req_fini(const struct lu_env *env,
 274                                          struct lfsck_layout_req *llr)
 275 {
 276         lu_object_put(env, &llr->llr_child->do_lu);
 277         lfsck_layout_object_put(env, llr->llr_parent);
 278         OBD_FREE_PTR(llr);
 279 }
 280
 281 static inline bool lfsck_layout_req_empty(struct lfsck_layout_master_data *llmd)
 282 {
 283         bool empty = false;
 284
 285         spin_lock(&llmd->llmd_lock);
 286         if (list_empty(&llmd->llmd_req_list))
 287                 empty = true;
 288         spin_unlock(&llmd->llmd_lock);
 289
 290         return empty;
 291 }
 292
 293 static int lfsck_layout_get_lovea(const struct lu_env *env,
 294                                   struct dt_object *obj,
 295                                   struct lu_buf *buf, ssize_t *buflen)
 296 {
 297         int rc;
 298
 299 again:
 300         rc = dt_xattr_get(env, obj, buf, XATTR_NAME_LOV, BYPASS_CAPA);
 301         if (rc == -ERANGE) {
 302                 rc = dt_xattr_get(env, obj, &LU_BUF_NULL, XATTR_NAME_LOV,
 303                                   BYPASS_CAPA);
 304                 if (rc <= 0)
 305                         return rc;
 306
 307                 lu_buf_realloc(buf, rc);
 308                 if (buflen != NULL)
 309                         *buflen = buf->lb_len;
 310
 311                 if (buf->lb_buf == NULL)
 312                         return -ENOMEM;
 313
 314                 goto again;
 315         }
 316
 317         if (rc == -ENODATA)
 318                 rc = 0;
 319
 320         if (rc <= 0)
 321                 return rc;
 322
 323         if (unlikely(buf->lb_buf == NULL)) {
 324                 lu_buf_alloc(buf, rc);
 325                 if (buflen != NULL)
 326                         *buflen = buf->lb_len;
 327
 328                 if (buf->lb_buf == NULL)
 329                         return -ENOMEM;
 330
 331                 goto again;
 332         }
 333
 334         return rc;
 335 }
 336
 337 static int lfsck_layout_verify_header(struct lov_mds_md_v1 *lmm)
 338 {
 339         __u32 magic;
 340         __u32 patten;
 341
 342         magic = le32_to_cpu(lmm->lmm_magic);
 343         /* If magic crashed, keep it there. Sometime later, during OST-object
 344          * orphan handling, if some OST-object(s) back-point to it, it can be
 345          * verified and repaired. */
 346         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
 347                 return -EINVAL;
 348
 349         patten = le32_to_cpu(lmm->lmm_pattern);
 350         /* XXX: currently, we only support LOV_PATTERN_RAID0. */
 351         if (patten != LOV_PATTERN_RAID0)
 352                 return -EOPNOTSUPP;
 353
 354         return 0;
 355 }
 356
 357 static void lfsck_layout_le_to_cpu(struct lfsck_layout *des,
 358                                    const struct lfsck_layout *src)
 359 {
 360         int i;
 361
 362         des->ll_magic = le32_to_cpu(src->ll_magic);
 363         des->ll_status = le32_to_cpu(src->ll_status);
 364         des->ll_flags = le32_to_cpu(src->ll_flags);
 365         des->ll_success_count = le32_to_cpu(src->ll_success_count);
 366         des->ll_run_time_phase1 = le32_to_cpu(src->ll_run_time_phase1);
 367         des->ll_run_time_phase2 = le32_to_cpu(src->ll_run_time_phase2);
 368         des->ll_time_last_complete = le64_to_cpu(src->ll_time_last_complete);
 369         des->ll_time_latest_start = le64_to_cpu(src->ll_time_latest_start);
 370         des->ll_time_last_checkpoint =
 371                                 le64_to_cpu(src->ll_time_last_checkpoint);
 372         des->ll_pos_latest_start = le64_to_cpu(src->ll_pos_latest_start);
 373         des->ll_pos_last_checkpoint = le64_to_cpu(src->ll_pos_last_checkpoint);
 374         des->ll_pos_first_inconsistent =
 375                         le64_to_cpu(src->ll_pos_first_inconsistent);
 376         des->ll_objs_checked_phase1 = le64_to_cpu(src->ll_objs_checked_phase1);
 377         des->ll_objs_failed_phase1 = le64_to_cpu(src->ll_objs_failed_phase1);
 378         des->ll_objs_checked_phase2 = le64_to_cpu(src->ll_objs_checked_phase2);
 379         des->ll_objs_failed_phase2 = le64_to_cpu(src->ll_objs_failed_phase2);
 380         for (i = 0; i < LLIT_MAX; i++)
 381                 des->ll_objs_repaired[i] =
 382                                 le64_to_cpu(src->ll_objs_repaired[i]);
 383         des->ll_objs_skipped = le64_to_cpu(src->ll_objs_skipped);
 384 }
 385
 386 static void lfsck_layout_cpu_to_le(struct lfsck_layout *des,
 387                                    const struct lfsck_layout *src)
 388 {
 389         int i;
 390
 391         des->ll_magic = cpu_to_le32(src->ll_magic);
 392         des->ll_status = cpu_to_le32(src->ll_status);
 393         des->ll_flags = cpu_to_le32(src->ll_flags);
 394         des->ll_success_count = cpu_to_le32(src->ll_success_count);
 395         des->ll_run_time_phase1 = cpu_to_le32(src->ll_run_time_phase1);
 396         des->ll_run_time_phase2 = cpu_to_le32(src->ll_run_time_phase2);
 397         des->ll_time_last_complete = cpu_to_le64(src->ll_time_last_complete);
 398         des->ll_time_latest_start = cpu_to_le64(src->ll_time_latest_start);
 399         des->ll_time_last_checkpoint =
 400                                 cpu_to_le64(src->ll_time_last_checkpoint);
 401         des->ll_pos_latest_start = cpu_to_le64(src->ll_pos_latest_start);
 402         des->ll_pos_last_checkpoint = cpu_to_le64(src->ll_pos_last_checkpoint);
 403         des->ll_pos_first_inconsistent =
 404                         cpu_to_le64(src->ll_pos_first_inconsistent);
 405         des->ll_objs_checked_phase1 = cpu_to_le64(src->ll_objs_checked_phase1);
 406         des->ll_objs_failed_phase1 = cpu_to_le64(src->ll_objs_failed_phase1);
 407         des->ll_objs_checked_phase2 = cpu_to_le64(src->ll_objs_checked_phase2);
 408         des->ll_objs_failed_phase2 = cpu_to_le64(src->ll_objs_failed_phase2);
 409         for (i = 0; i < LLIT_MAX; i++)
 410                 des->ll_objs_repaired[i] =
 411                                 cpu_to_le64(src->ll_objs_repaired[i]);
 412         des->ll_objs_skipped = cpu_to_le64(src->ll_objs_skipped);
 413 }
 414
 415 /**
 416  * \retval +ve: the lfsck_layout is broken, the caller should reset it.
 417  * \retval 0: succeed.
 418  * \retval -ve: failed cases.
 419  */
 420 static int lfsck_layout_load(const struct lu_env *env,
 421                              struct lfsck_component *com)
 422 {
 423         struct lfsck_layout             *lo     = com->lc_file_ram;
 424         const struct dt_body_operations *dbo    = com->lc_obj->do_body_ops;
 425         ssize_t                          size   = com->lc_file_size;
 426         loff_t                           pos    = 0;
 427         int                              rc;
 428
 429         rc = dbo->dbo_read(env, com->lc_obj,
 430                            lfsck_buf_get(env, com->lc_file_disk, size), &pos,
 431                            BYPASS_CAPA);
 432         if (rc == 0) {
 433                 return -ENOENT;
 434         } else if (rc < 0) {
 435                 CWARN("%s: failed to load lfsck_layout: rc = %d\n",
 436                       lfsck_lfsck2name(com->lc_lfsck), rc);
 437                 return rc;
 438         } else if (rc != size) {
 439                 CWARN("%s: crashed lfsck_layout, to be reset: rc = %d\n",
 440                       lfsck_lfsck2name(com->lc_lfsck), rc);
 441                 return 1;
 442         }
 443
 444         lfsck_layout_le_to_cpu(lo, com->lc_file_disk);
 445         if (lo->ll_magic != LFSCK_LAYOUT_MAGIC) {
 446                 CWARN("%s: invalid lfsck_layout magic %#x != %#x, "
 447                       "to be reset\n", lfsck_lfsck2name(com->lc_lfsck),
 448                       lo->ll_magic, LFSCK_LAYOUT_MAGIC);
 449                 return 1;
 450         }
 451
 452         return 0;
 453 }
 454
 455 static int lfsck_layout_store(const struct lu_env *env,
 456                               struct lfsck_component *com)
 457 {
 458         struct dt_object         *obj           = com->lc_obj;
 459         struct lfsck_instance    *lfsck         = com->lc_lfsck;
 460         struct lfsck_layout      *lo            = com->lc_file_disk;
 461         struct thandle           *handle;
 462         ssize_t                   size          = com->lc_file_size;
 463         loff_t                    pos           = 0;
 464         int                       rc;
 465         ENTRY;
 466
 467         lfsck_layout_cpu_to_le(lo, com->lc_file_ram);
 468         handle = dt_trans_create(env, lfsck->li_bottom);
 469         if (IS_ERR(handle)) {
 470                 rc = PTR_ERR(handle);
 471                 CERROR("%s: fail to create trans for storing lfsck_layout: "
 472                        "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
 473                 RETURN(rc);
 474         }
 475
 476         rc = dt_declare_record_write(env, obj, size, pos, handle);
 477         if (rc != 0) {
 478                 CERROR("%s: fail to declare trans for storing lfsck_layout(1): "
 479                        "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
 480                 GOTO(out, rc);
 481         }
 482
 483         rc = dt_trans_start_local(env, lfsck->li_bottom, handle);
 484         if (rc != 0) {
 485                 CERROR("%s: fail to start trans for storing lfsck_layout: "
 486                        "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
 487                 GOTO(out, rc);
 488         }
 489
 490         rc = dt_record_write(env, obj, lfsck_buf_get(env, lo, size), &pos,
 491                              handle);
 492         if (rc != 0)
 493                 CERROR("%s: fail to store lfsck_layout(1): size = %d, "
 494                        "rc = %d\n", lfsck_lfsck2name(lfsck), (int)size, rc);
 495
 496         GOTO(out, rc);
 497
 498 out:
 499         dt_trans_stop(env, lfsck->li_bottom, handle);
 500
 501         return rc;
 502 }
 503
 504 static int lfsck_layout_init(const struct lu_env *env,
 505                              struct lfsck_component *com)
 506 {
 507         struct lfsck_layout *lo = com->lc_file_ram;
 508         int rc;
 509
 510         memset(lo, 0, com->lc_file_size);
 511         lo->ll_magic = LFSCK_LAYOUT_MAGIC;
 512         lo->ll_status = LS_INIT;
 513         down_write(&com->lc_sem);
 514         rc = lfsck_layout_store(env, com);
 515         up_write(&com->lc_sem);
 516
 517         return rc;
 518 }
 519
 520 static int fid_is_for_ostobj(const struct lu_env *env, struct dt_device *dt,
 521                              struct dt_object *obj, const struct lu_fid *fid)
 522 {
 523         struct seq_server_site  *ss     = lu_site2seq(dt->dd_lu_dev.ld_site);
 524         struct lu_seq_range      range  = { 0 };
 525         struct lustre_mdt_attrs *lma;
 526         int                      rc;
 527
 528         fld_range_set_any(&range);
 529         rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(fid), &range);
 530         if (rc == 0) {
 531                 if (fld_range_is_ost(&range))
 532                         return 1;
 533
 534                 return 0;
 535         }
 536
 537         lma = &lfsck_env_info(env)->lti_lma;
 538         rc = dt_xattr_get(env, obj, lfsck_buf_get(env, lma, sizeof(*lma)),
 539                           XATTR_NAME_LMA, BYPASS_CAPA);
 540         if (rc == sizeof(*lma)) {
 541                 lustre_lma_swab(lma);
 542
 543                 return lma->lma_compat & LMAC_FID_ON_OST ? 1 : 0;
 544         }
 545
 546         rc = dt_xattr_get(env, obj, &LU_BUF_NULL, XATTR_NAME_FID, BYPASS_CAPA);
 547
 548         return rc > 0;
 549 }
 550
 551 static struct lfsck_layout_seq *
 552 lfsck_layout_seq_lookup(struct lfsck_layout_slave_data *llsd, __u64 seq)
 553 {
 554         struct lfsck_layout_seq *lls;
 555
 556         list_for_each_entry(lls, &llsd->llsd_seq_list, lls_list) {
 557                 if (lls->lls_seq == seq)
 558                         return lls;
 559
 560                 if (lls->lls_seq > seq)
 561                         return NULL;
 562         }
 563
 564         return NULL;
 565 }
 566
 567 static void
 568 lfsck_layout_seq_insert(struct lfsck_layout_slave_data *llsd,
 569                         struct lfsck_layout_seq *lls)
 570 {
 571         struct lfsck_layout_seq *tmp;
 572         struct list_head        *pos = &llsd->llsd_seq_list;
 573
 574         list_for_each_entry(tmp, &llsd->llsd_seq_list, lls_list) {
 575                 if (lls->lls_seq < tmp->lls_seq) {
 576                         pos = &tmp->lls_list;
 577                         break;
 578                 }
 579         }
 580         list_add_tail(&lls->lls_list, pos);
 581 }
 582
 583 static int
 584 lfsck_layout_lastid_create(const struct lu_env *env,
 585                            struct lfsck_instance *lfsck,
 586                            struct dt_object *obj)
 587 {
 588         struct lfsck_thread_info *info   = lfsck_env_info(env);
 589         struct lu_attr           *la     = &info->lti_la;
 590         struct dt_object_format  *dof    = &info->lti_dof;
 591         struct lfsck_bookmark    *bk     = &lfsck->li_bookmark_ram;
 592         struct dt_device         *dt     = lfsck->li_bottom;
 593         struct thandle           *th;
 594         __u64                     lastid = 0;
 595         loff_t                    pos    = 0;
 596         int                       rc;
 597         ENTRY;
 598
 599         CDEBUG(D_LFSCK, "To create LAST_ID for <seq> "LPX64"\n",
 600                fid_seq(lfsck_dto2fid(obj)));
 601
 602         if (bk->lb_param & LPF_DRYRUN)
 603                 return 0;
 604
 605         memset(la, 0, sizeof(*la));
 606         la->la_mode = S_IFREG |  S_IRUGO | S_IWUSR;
 607         la->la_valid = LA_MODE | LA_UID | LA_GID;
 608         dof->dof_type = dt_mode_to_dft(S_IFREG);
 609
 610         th = dt_trans_create(env, dt);
 611         if (IS_ERR(th))
 612                 RETURN(rc = PTR_ERR(th));
 613
 614         rc = dt_declare_create(env, obj, la, NULL, dof, th);
 615         if (rc != 0)
 616                 GOTO(stop, rc);
 617
 618         rc = dt_declare_record_write(env, obj, sizeof(lastid), pos, th);
 619         if (rc != 0)
 620                 GOTO(stop, rc);
 621
 622         rc = dt_trans_start_local(env, dt, th);
 623         if (rc != 0)
 624                 GOTO(stop, rc);
 625
 626         dt_write_lock(env, obj, 0);
 627         if (likely(!dt_object_exists(obj))) {
 628                 rc = dt_create(env, obj, la, NULL, dof, th);
 629                 if (rc == 0)
 630                         rc = dt_record_write(env, obj,
 631                                 lfsck_buf_get(env, &lastid, sizeof(lastid)),
 632                                 &pos, th);
 633         }
 634         dt_write_unlock(env, obj);
 635
 636         GOTO(stop, rc);
 637
 638 stop:
 639         dt_trans_stop(env, dt, th);
 640
 641         return rc;
 642 }
 643
 644 static int
 645 lfsck_layout_lastid_reload(const struct lu_env *env,
 646                            struct lfsck_component *com,
 647                            struct lfsck_layout_seq *lls)
 648 {
 649         __u64   lastid;
 650         loff_t  pos     = 0;
 651         int     rc;
 652
 653         dt_read_lock(env, lls->lls_lastid_obj, 0);
 654         rc = dt_record_read(env, lls->lls_lastid_obj,
 655                             lfsck_buf_get(env, &lastid, sizeof(lastid)), &pos);
 656         dt_read_unlock(env, lls->lls_lastid_obj);
 657         if (unlikely(rc != 0))
 658                 return rc;
 659
 660         lastid = le64_to_cpu(lastid);
 661         if (lastid < lls->lls_lastid_known) {
 662                 struct lfsck_instance   *lfsck  = com->lc_lfsck;
 663                 struct lfsck_layout     *lo     = com->lc_file_ram;
 664
 665                 lls->lls_lastid = lls->lls_lastid_known;
 666                 lls->lls_dirty = 1;
 667                 if (!(lo->ll_flags & LF_CRASHED_LASTID)) {
 668                         LASSERT(lfsck->li_out_notify != NULL);
 669
 670                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
 671                                              LE_LASTID_REBUILDING);
 672                         lo->ll_flags |= LF_CRASHED_LASTID;
 673                 }
 674         } else if (lastid >= lls->lls_lastid) {
 675                 lls->lls_lastid = lastid;
 676                 lls->lls_dirty = 0;
 677         }
 678
 679         return 0;
 680 }
 681
 682 static int
 683 lfsck_layout_lastid_store(const struct lu_env *env,
 684                           struct lfsck_component *com)
 685 {
 686         struct lfsck_instance           *lfsck  = com->lc_lfsck;
 687         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
 688         struct dt_device                *dt     = lfsck->li_bottom;
 689         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
 690         struct lfsck_layout_seq         *lls;
 691         struct thandle                  *th;
 692         __u64                            lastid;
 693         int                              rc     = 0;
 694         int                              rc1    = 0;
 695
 696         list_for_each_entry(lls, &llsd->llsd_seq_list, lls_list) {
 697                 loff_t pos = 0;
 698
 699                 /* XXX: Add the code back if we really found related
 700                  *      inconsistent cases in the future. */
 701 #if 0
 702                 if (!lls->lls_dirty) {
 703                         /* In OFD, before the pre-creation, the LAST_ID
 704                          * file will be updated firstly, which may hide
 705                          * some potential crashed cases. For example:
 706                          *
 707                          * The old obj1's ID is higher than old LAST_ID
 708                          * but lower than the new LAST_ID, but the LFSCK
 709                          * have not touch the obj1 until the OFD updated
 710                          * the LAST_ID. So the LFSCK does not regard it
 711                          * as crashed case. But when OFD does not create
 712                          * successfully, it will set the LAST_ID as the
 713                          * real created objects' ID, then LFSCK needs to
 714                          * found related inconsistency. */
 715                         rc = lfsck_layout_lastid_reload(env, com, lls);
 716                         if (likely(!lls->lls_dirty))
 717                                 continue;
 718                 }
 719 #endif
 720
 721                 CDEBUG(D_LFSCK, "To sync the LAST_ID for <seq> "LPX64
 722                        " as <oid> "LPU64"\n", lls->lls_seq, lls->lls_lastid);
 723
 724                 if (bk->lb_param & LPF_DRYRUN) {
 725                         lls->lls_dirty = 0;
 726                         continue;
 727                 }
 728
 729                 th = dt_trans_create(env, dt);
 730                 if (IS_ERR(th)) {
 731                         rc1 = PTR_ERR(th);
 732                         CERROR("%s: (1) failed to store "LPX64": rc = %d\n",
 733                                lfsck_lfsck2name(com->lc_lfsck),
 734                                lls->lls_seq, rc1);
 735                         continue;
 736                 }
 737
 738                 rc = dt_declare_record_write(env, lls->lls_lastid_obj,
 739                                              sizeof(lastid), pos, th);
 740                 if (rc != 0)
 741                         goto stop;
 742
 743                 rc = dt_trans_start_local(env, dt, th);
 744                 if (rc != 0)
 745                         goto stop;
 746
 747                 lastid = cpu_to_le64(lls->lls_lastid);
 748                 dt_write_lock(env, lls->lls_lastid_obj, 0);
 749                 rc = dt_record_write(env, lls->lls_lastid_obj,
 750                                      lfsck_buf_get(env, &lastid,
 751                                      sizeof(lastid)), &pos, th);
 752                 dt_write_unlock(env, lls->lls_lastid_obj);
 753                 if (rc == 0)
 754                         lls->lls_dirty = 0;
 755
 756 stop:
 757                 dt_trans_stop(env, dt, th);
 758                 if (rc != 0) {
 759                         rc1 = rc;
 760                         CERROR("%s: (2) failed to store "LPX64": rc = %d\n",
 761                                lfsck_lfsck2name(com->lc_lfsck),
 762                                lls->lls_seq, rc1);
 763                 }
 764         }
 765
 766         return rc1;
 767 }
 768
 769 static int
 770 lfsck_layout_lastid_load(const struct lu_env *env,
 771                          struct lfsck_component *com,
 772                          struct lfsck_layout_seq *lls)
 773 {
 774         struct lfsck_instance   *lfsck  = com->lc_lfsck;
 775         struct lfsck_layout     *lo     = com->lc_file_ram;
 776         struct lu_fid           *fid    = &lfsck_env_info(env)->lti_fid;
 777         struct dt_object        *obj;
 778         loff_t                   pos    = 0;
 779         int                      rc;
 780         ENTRY;
 781
 782         lu_last_id_fid(fid, lls->lls_seq, lfsck_dev_idx(lfsck->li_bottom));
 783         obj = dt_locate(env, lfsck->li_bottom, fid);
 784         if (IS_ERR(obj))
 785                 RETURN(PTR_ERR(obj));
 786
 787         /* LAST_ID crashed, to be rebuilt */
 788         if (!dt_object_exists(obj)) {
 789                 if (!(lo->ll_flags & LF_CRASHED_LASTID)) {
 790                         LASSERT(lfsck->li_out_notify != NULL);
 791
 792                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
 793                                              LE_LASTID_REBUILDING);
 794                         lo->ll_flags |= LF_CRASHED_LASTID;
 795
 796                         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_DELAY4) &&
 797                             cfs_fail_val > 0) {
 798                                 struct l_wait_info lwi = LWI_TIMEOUT(
 799                                                 cfs_time_seconds(cfs_fail_val),
 800                                                 NULL, NULL);
 801
 802                                 up_write(&com->lc_sem);
 803                                 l_wait_event(lfsck->li_thread.t_ctl_waitq,
 804                                              !thread_is_running(&lfsck->li_thread),
 805                                              &lwi);
 806                                 down_write(&com->lc_sem);
 807                         }
 808                 }
 809
 810                 rc = lfsck_layout_lastid_create(env, lfsck, obj);
 811         } else {
 812                 dt_read_lock(env, obj, 0);
 813                 rc = dt_read(env, obj,
 814                         lfsck_buf_get(env, &lls->lls_lastid, sizeof(__u64)),
 815                         &pos);
 816                 dt_read_unlock(env, obj);
 817                 if (rc != 0 && rc != sizeof(__u64))
 818                         GOTO(out, rc = (rc > 0 ? -EFAULT : rc));
 819
 820                 if (rc == 0 && !(lo->ll_flags & LF_CRASHED_LASTID)) {
 821                         LASSERT(lfsck->li_out_notify != NULL);
 822
 823                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
 824                                              LE_LASTID_REBUILDING);
 825                         lo->ll_flags |= LF_CRASHED_LASTID;
 826                 }
 827
 828                 lls->lls_lastid = le64_to_cpu(lls->lls_lastid);
 829                 rc = 0;
 830         }
 831
 832         GOTO(out, rc);
 833
 834 out:
 835         if (rc != 0)
 836                 lfsck_object_put(env, obj);
 837         else
 838                 lls->lls_lastid_obj = obj;
 839
 840         return rc;
 841 }
 842
 843 static int lfsck_layout_master_async_interpret(const struct lu_env *env,
 844                                                struct ptlrpc_request *req,
 845                                                void *args, int rc)
 846 {
 847         struct lfsck_async_interpret_args *laia = args;
 848         struct lfsck_component            *com  = laia->laia_com;
 849         struct lfsck_layout_master_data   *llmd = com->lc_data;
 850         struct lfsck_tgt_descs            *ltds = laia->laia_ltds;
 851         struct lfsck_tgt_desc             *ltd  = laia->laia_ltd;
 852         struct lfsck_request              *lr   = laia->laia_lr;
 853
 854         switch (lr->lr_event) {
 855         case LE_START:
 856                 if (rc != 0) {
 857                         struct lfsck_layout *lo = com->lc_file_ram;
 858
 859                         lo->ll_flags |= LF_INCOMPLETE;
 860                         lfsck_tgt_put(ltd);
 861                         break;
 862                 }
 863
 864                 spin_lock(&ltds->ltd_lock);
 865                 if (ltd->ltd_dead || ltd->ltd_layout_done) {
 866                         spin_unlock(&ltds->ltd_lock);
 867                         lfsck_tgt_put(ltd);
 868                         break;
 869                 }
 870
 871                 if (lr->lr_flags & LEF_TO_OST) {
 872                         if (list_empty(&ltd->ltd_layout_list))
 873                                 list_add_tail(&ltd->ltd_layout_list,
 874                                               &llmd->llmd_ost_list);
 875                         if (list_empty(&ltd->ltd_layout_phase_list))
 876                                 list_add_tail(&ltd->ltd_layout_phase_list,
 877                                               &llmd->llmd_ost_phase1_list);
 878                 } else {
 879                         if (list_empty(&ltd->ltd_layout_list))
 880                                 list_add_tail(&ltd->ltd_layout_list,
 881                                               &llmd->llmd_mdt_list);
 882                         if (list_empty(&ltd->ltd_layout_phase_list))
 883                                 list_add_tail(&ltd->ltd_layout_phase_list,
 884                                               &llmd->llmd_mdt_phase1_list);
 885                 }
 886                 spin_unlock(&ltds->ltd_lock);
 887                 lfsck_tgt_put(ltd);
 888                 break;
 889         case LE_STOP:
 890         case LE_PHASE1_DONE:
 891         case LE_PHASE2_DONE:
 892                 if (rc != 0)
 893                         CERROR("%s: fail to notify %s %x for layout: "
 894                                "event = %d, rc = %d\n",
 895                                lfsck_lfsck2name(com->lc_lfsck),
 896                                (lr->lr_flags & LEF_TO_OST) ? "OST" : "MDT",
 897                                ltd->ltd_index, lr->lr_event, rc);
 898                 break;
 899         case LE_QUERY: {
 900                 struct lfsck_reply *reply;
 901
 902                 if (rc != 0) {
 903                         spin_lock(&ltds->ltd_lock);
 904                         list_del_init(&ltd->ltd_layout_phase_list);
 905                         list_del_init(&ltd->ltd_layout_list);
 906                         spin_unlock(&ltds->ltd_lock);
 907                         lfsck_tgt_put(ltd);
 908                         break;
 909                 }
 910
 911                 reply = req_capsule_server_get(&req->rq_pill,
 912                                                &RMF_LFSCK_REPLY);
 913                 if (reply == NULL) {
 914                         rc = -EPROTO;
 915                         CERROR("%s: invalid return value: rc = %d\n",
 916                                lfsck_lfsck2name(com->lc_lfsck), rc);
 917                         spin_lock(&ltds->ltd_lock);
 918                         list_del_init(&ltd->ltd_layout_phase_list);
 919                         list_del_init(&ltd->ltd_layout_list);
 920                         spin_unlock(&ltds->ltd_lock);
 921                         lfsck_tgt_put(ltd);
 922                         break;
 923                 }
 924
 925                 switch (reply->lr_status) {
 926                 case LS_SCANNING_PHASE1:
 927                         break;
 928                 case LS_SCANNING_PHASE2:
 929                         spin_lock(&ltds->ltd_lock);
 930                         list_del_init(&ltd->ltd_layout_phase_list);
 931                         if (ltd->ltd_dead || ltd->ltd_layout_done) {
 932                                 spin_unlock(&ltds->ltd_lock);
 933                                 break;
 934                         }
 935
 936                         if (lr->lr_flags & LEF_TO_OST)
 937                                 list_add_tail(&ltd->ltd_layout_phase_list,
 938                                               &llmd->llmd_ost_phase2_list);
 939                         else
 940                                 list_add_tail(&ltd->ltd_layout_phase_list,
 941                                               &llmd->llmd_mdt_phase2_list);
 942                         spin_unlock(&ltds->ltd_lock);
 943                         break;
 944                 default:
 945                         spin_lock(&ltds->ltd_lock);
 946                         list_del_init(&ltd->ltd_layout_phase_list);
 947                         list_del_init(&ltd->ltd_layout_list);
 948                         spin_unlock(&ltds->ltd_lock);
 949                         break;
 950                 }
 951                 lfsck_tgt_put(ltd);
 952                 break;
 953         }
 954         default:
 955                 CERROR("%s: unexpected event: rc = %d\n",
 956                        lfsck_lfsck2name(com->lc_lfsck), lr->lr_event);
 957                 break;
 958         }
 959
 960         lfsck_component_put(env, com);
 961
 962         return 0;
 963 }
 964
 965 static int lfsck_layout_master_query_others(const struct lu_env *env,
 966                                             struct lfsck_component *com)
 967 {
 968         struct lfsck_thread_info          *info  = lfsck_env_info(env);
 969         struct lfsck_request              *lr    = &info->lti_lr;
 970         struct lfsck_async_interpret_args *laia  = &info->lti_laia;
 971         struct lfsck_instance             *lfsck = com->lc_lfsck;
 972         struct lfsck_layout_master_data   *llmd  = com->lc_data;
 973         struct ptlrpc_request_set         *set;
 974         struct lfsck_tgt_descs            *ltds;
 975         struct lfsck_tgt_desc             *ltd;
 976         struct list_head                  *head;
 977         __u32                              cnt   = 0;
 978         int                                rc    = 0;
 979         int                                rc1   = 0;
 980         ENTRY;
 981
 982         set = ptlrpc_prep_set();
 983         if (set == NULL)
 984                 RETURN(-ENOMEM);
 985
 986         llmd->llmd_touch_gen++;
 987         memset(lr, 0, sizeof(*lr));
 988         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
 989         lr->lr_event = LE_QUERY;
 990         lr->lr_active = LT_LAYOUT;
 991         laia->laia_com = com;
 992         laia->laia_lr = lr;
 993
 994         if (!list_empty(&llmd->llmd_mdt_phase1_list)) {
 995                 ltds = &lfsck->li_mdt_descs;
 996                 lr->lr_flags = 0;
 997                 head = &llmd->llmd_mdt_phase1_list;
 998         } else {
 999
1000 again:
1001                 ltds = &lfsck->li_ost_descs;
1002                 lr->lr_flags = LEF_TO_OST;
1003                 head = &llmd->llmd_ost_phase1_list;
1004         }
1005
1006         laia->laia_ltds = ltds;
1007         spin_lock(&ltds->ltd_lock);
1008         while (!list_empty(head)) {
1009                 ltd = list_entry(head->next,
1010                                  struct lfsck_tgt_desc,
1011                                  ltd_layout_phase_list);
1012                 if (ltd->ltd_layout_gen == llmd->llmd_touch_gen)
1013                         break;
1014
1015                 ltd->ltd_layout_gen = llmd->llmd_touch_gen;
1016                 list_del(&ltd->ltd_layout_phase_list);
1017                 list_add_tail(&ltd->ltd_layout_phase_list, head);
1018                 atomic_inc(&ltd->ltd_ref);
1019                 laia->laia_ltd = ltd;
1020                 spin_unlock(&ltds->ltd_lock);
1021                 rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
1022                                          lfsck_layout_master_async_interpret,
1023                                          laia, LFSCK_QUERY);
1024                 if (rc != 0) {
1025                         CERROR("%s: fail to query %s %x for layout: rc = %d\n",
1026                                lfsck_lfsck2name(lfsck),
1027                                (lr->lr_flags & LEF_TO_OST) ? "OST" : "MDT",
1028                                ltd->ltd_index, rc);
1029                         lfsck_tgt_put(ltd);
1030                         rc1 = rc;
1031                 } else {
1032                         cnt++;
1033                 }
1034                 spin_lock(&ltds->ltd_lock);
1035         }
1036         spin_unlock(&ltds->ltd_lock);
1037
1038         if (cnt > 0) {
1039                 rc = ptlrpc_set_wait(set);
1040                 if (rc < 0) {
1041                         ptlrpc_set_destroy(set);
1042                         RETURN(rc);
1043                 }
1044                 cnt = 0;
1045         }
1046
1047         if (!(lr->lr_flags & LEF_TO_OST) &&
1048             list_empty(&llmd->llmd_mdt_phase1_list))
1049                 goto again;
1050
1051         ptlrpc_set_destroy(set);
1052
1053         RETURN(rc1 != 0 ? rc1 : rc);
1054 }
1055
1056 static inline bool
1057 lfsck_layout_master_to_orphan(struct lfsck_layout_master_data *llmd)
1058 {
1059         return list_empty(&llmd->llmd_mdt_phase1_list) &&
1060                (!list_empty(&llmd->llmd_ost_phase2_list) ||
1061                 list_empty(&llmd->llmd_ost_phase1_list));
1062 }
1063
1064 static int lfsck_layout_master_notify_others(const struct lu_env *env,
1065                                              struct lfsck_component *com,
1066                                              struct lfsck_request *lr,
1067                                              __u32 flags)
1068 {
1069         struct lfsck_thread_info          *info  = lfsck_env_info(env);
1070         struct lfsck_async_interpret_args *laia  = &info->lti_laia;
1071         struct lfsck_instance             *lfsck = com->lc_lfsck;
1072         struct lfsck_layout_master_data   *llmd  = com->lc_data;
1073         struct lfsck_layout               *lo    = com->lc_file_ram;
1074         struct ptlrpc_request_set         *set;
1075         struct lfsck_tgt_descs            *ltds;
1076         struct lfsck_tgt_desc             *ltd;
1077         struct lfsck_tgt_desc             *next;
1078         struct list_head                  *head;
1079         __u32                              idx;
1080         __u32                              cnt   = 0;
1081         int                                rc    = 0;
1082         ENTRY;
1083
1084         set = ptlrpc_prep_set();
1085         if (set == NULL)
1086                 RETURN(-ENOMEM);
1087
1088         lr->lr_active = LT_LAYOUT;
1089         laia->laia_com = com;
1090         laia->laia_lr = lr;
1091         lr->lr_flags = 0;
1092         switch (lr->lr_event) {
1093         case LE_START:
1094                 /* Notify OSTs firstly, then other MDTs if needed. */
1095                 lr->lr_flags |= LEF_TO_OST;
1096                 ltds = &lfsck->li_ost_descs;
1097
1098 lable1:
1099                 laia->laia_ltds = ltds;
1100                 down_read(&ltds->ltd_rw_sem);
1101                 cfs_foreach_bit(ltds->ltd_tgts_bitmap, idx) {
1102                         ltd = lfsck_tgt_get(ltds, idx);
1103                         LASSERT(ltd != NULL);
1104
1105                         laia->laia_ltd = ltd;
1106                         ltd->ltd_layout_done = 0;
1107                         rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
1108                                         lfsck_layout_master_async_interpret,
1109                                         laia, LFSCK_NOTIFY);
1110                         if (rc != 0) {
1111                                 CERROR("%s: fail to notify %s %x for layout "
1112                                        "start: rc = %d\n",
1113                                        lfsck_lfsck2name(lfsck),
1114                                        (lr->lr_flags & LEF_TO_OST) ? "OST" :
1115                                        "MDT", idx, rc);
1116                                 lfsck_tgt_put(ltd);
1117                                 lo->ll_flags |= LF_INCOMPLETE;
1118                         } else {
1119                                 cnt++;
1120                         }
1121                 }
1122                 up_read(&ltds->ltd_rw_sem);
1123
1124                 /* Sync up */
1125                 if (cnt > 0) {
1126                         rc = ptlrpc_set_wait(set);
1127                         if (rc < 0) {
1128                                 ptlrpc_set_destroy(set);
1129                                 RETURN(rc);
1130                         }
1131                         cnt = 0;
1132                 }
1133
1134                 if (!(flags & LPF_ALL_MDT))
1135                         break;
1136
1137                 ltds = &lfsck->li_mdt_descs;
1138                 /* The sponsor broadcasts the request to other MDTs. */
1139                 if (flags & LPF_BROADCAST) {
1140                         flags &= ~LPF_ALL_MDT;
1141                         lr->lr_flags &= ~LEF_TO_OST;
1142                         goto lable1;
1143                 }
1144
1145                 /* non-sponsors link other MDT targets locallly. */
1146                 spin_lock(&ltds->ltd_lock);
1147                 cfs_foreach_bit(ltds->ltd_tgts_bitmap, idx) {
1148                         ltd = LTD_TGT(ltds, idx);
1149                         LASSERT(ltd != NULL);
1150
1151                         if (!list_empty(&ltd->ltd_layout_list))
1152                                 continue;
1153
1154                         list_add_tail(&ltd->ltd_layout_list,
1155                                       &llmd->llmd_mdt_list);
1156                         list_add_tail(&ltd->ltd_layout_phase_list,
1157                                       &llmd->llmd_mdt_phase1_list);
1158                 }
1159                 spin_unlock(&ltds->ltd_lock);
1160
1161                 break;
1162         case LE_STOP:
1163                 if (flags & LPF_BROADCAST)
1164                         lr->lr_flags |= LEF_FORCE_STOP;
1165         case LE_PHASE2_DONE:
1166                 /* Notify other MDTs if needed, then the OSTs. */
1167                 if (flags & LPF_ALL_MDT) {
1168                         /* The sponsor broadcasts the request to other MDTs. */
1169                         if (flags & LPF_BROADCAST) {
1170                                 lr->lr_flags &= ~LEF_TO_OST;
1171                                 head = &llmd->llmd_mdt_list;
1172                                 ltds = &lfsck->li_mdt_descs;
1173                                 goto lable3;
1174                         }
1175
1176                         /* non-sponsors unlink other MDT targets locallly. */
1177                         ltds = &lfsck->li_mdt_descs;
1178                         spin_lock(&ltds->ltd_lock);
1179                         list_for_each_entry_safe(ltd, next,
1180                                                  &llmd->llmd_mdt_list,
1181                                                  ltd_layout_list) {
1182                                 list_del_init(&ltd->ltd_layout_phase_list);
1183                                 list_del_init(&ltd->ltd_layout_list);
1184                         }
1185                         spin_unlock(&ltds->ltd_lock);
1186                 }
1187
1188 lable2:
1189                 lr->lr_flags |= LEF_TO_OST;
1190                 head = &llmd->llmd_ost_list;
1191                 ltds = &lfsck->li_ost_descs;
1192
1193 lable3:
1194                 laia->laia_ltds = ltds;
1195                 spin_lock(&ltds->ltd_lock);
1196                 while (!list_empty(head)) {
1197                         ltd = list_entry(head->next, struct lfsck_tgt_desc,
1198                                          ltd_layout_list);
1199                         if (!list_empty(&ltd->ltd_layout_phase_list))
1200                                 list_del_init(&ltd->ltd_layout_phase_list);
1201                         list_del_init(&ltd->ltd_layout_list);
1202                         laia->laia_ltd = ltd;
1203                         spin_unlock(&ltds->ltd_lock);
1204                         rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
1205                                         lfsck_layout_master_async_interpret,
1206                                         laia, LFSCK_NOTIFY);
1207                         if (rc != 0)
1208                                 CERROR("%s: fail to notify %s %x for layout "
1209                                        "stop/phase2: rc = %d\n",
1210                                        lfsck_lfsck2name(lfsck),
1211                                        (lr->lr_flags & LEF_TO_OST) ? "OST" :
1212                                        "MDT", ltd->ltd_index, rc);
1213                         else
1214                                 cnt++;
1215                         spin_lock(&ltds->ltd_lock);
1216                 }
1217                 spin_unlock(&ltds->ltd_lock);
1218
1219                 if (!(flags & LPF_BROADCAST))
1220                         break;
1221
1222                 /* Sync up */
1223                 if (cnt > 0) {
1224                         rc = ptlrpc_set_wait(set);
1225                         if (rc < 0) {
1226                                 ptlrpc_set_destroy(set);
1227                                 RETURN(rc);
1228                         }
1229                         cnt = 0;
1230                 }
1231
1232                 flags &= ~LPF_BROADCAST;
1233                 goto lable2;
1234         case LE_PHASE1_DONE:
1235                 llmd->llmd_touch_gen++;
1236                 lr->lr_flags &= ~LEF_TO_OST;
1237                 ltds = &lfsck->li_mdt_descs;
1238                 laia->laia_ltds = ltds;
1239                 spin_lock(&ltds->ltd_lock);
1240                 while (!list_empty(&llmd->llmd_mdt_phase1_list)) {
1241                         ltd = list_entry(llmd->llmd_mdt_phase1_list.next,
1242                                          struct lfsck_tgt_desc,
1243                                          ltd_layout_phase_list);
1244                         if (ltd->ltd_layout_gen == llmd->llmd_touch_gen)
1245                                 break;
1246
1247                         ltd->ltd_layout_gen = llmd->llmd_touch_gen;
1248                         list_del_init(&ltd->ltd_layout_phase_list);
1249                         list_add_tail(&ltd->ltd_layout_phase_list,
1250                                       &llmd->llmd_mdt_phase1_list);
1251                         laia->laia_ltd = ltd;
1252                         spin_unlock(&ltds->ltd_lock);
1253                         rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
1254                                         lfsck_layout_master_async_interpret,
1255                                         laia, LFSCK_NOTIFY);
1256                         if (rc != 0)
1257                                 CERROR("%s: fail to notify MDT %x for layout "
1258                                        "phase1 done: rc = %d\n",
1259                                        lfsck_lfsck2name(lfsck),
1260                                        ltd->ltd_index, rc);
1261                         else
1262                                 cnt++;
1263                         spin_lock(&ltds->ltd_lock);
1264                 }
1265                 spin_unlock(&ltds->ltd_lock);
1266                 break;
1267         default:
1268                 CERROR("%s: unexpected LFSCK event: rc = %d\n",
1269                        lfsck_lfsck2name(lfsck), lr->lr_event);
1270                 rc = -EINVAL;
1271                 break;
1272         }
1273
1274         if (cnt > 0)
1275                 rc = ptlrpc_set_wait(set);
1276         ptlrpc_set_destroy(set);
1277
1278         if (rc == 0 && lr->lr_event == LE_START &&
1279             list_empty(&llmd->llmd_ost_list))
1280                 rc = -ENODEV;
1281
1282         RETURN(rc);
1283 }
1284
1285 static int lfsck_layout_double_scan_result(const struct lu_env *env,
1286                                            struct lfsck_component *com,
1287                                            int rc)
1288 {
1289         struct lfsck_instance   *lfsck = com->lc_lfsck;
1290         struct lfsck_layout     *lo    = com->lc_file_ram;
1291         struct lfsck_bookmark   *bk    = &lfsck->li_bookmark_ram;
1292
1293         down_write(&com->lc_sem);
1294
1295         lo->ll_run_time_phase2 += cfs_duration_sec(cfs_time_current() +
1296                                 HALF_SEC - lfsck->li_time_last_checkpoint);
1297         lo->ll_time_last_checkpoint = cfs_time_current_sec();
1298         lo->ll_objs_checked_phase2 += com->lc_new_checked;
1299
1300         if (rc > 0) {
1301                 com->lc_journal = 0;
1302                 if (lo->ll_flags & LF_INCOMPLETE)
1303                         lo->ll_status = LS_PARTIAL;
1304                 else
1305                         lo->ll_status = LS_COMPLETED;
1306                 if (!(bk->lb_param & LPF_DRYRUN))
1307                         lo->ll_flags &= ~(LF_SCANNED_ONCE | LF_INCONSISTENT);
1308                 lo->ll_time_last_complete = lo->ll_time_last_checkpoint;
1309                 lo->ll_success_count++;
1310         } else if (rc == 0) {
1311                 lo->ll_status = lfsck->li_status;
1312                 if (lo->ll_status == 0)
1313                         lo->ll_status = LS_STOPPED;
1314         } else {
1315                 lo->ll_status = LS_FAILED;
1316         }
1317
1318         if (lo->ll_status != LS_PAUSED) {
1319                 spin_lock(&lfsck->li_lock);
1320                 list_del_init(&com->lc_link);
1321                 list_add_tail(&com->lc_link, &lfsck->li_list_idle);
1322                 spin_unlock(&lfsck->li_lock);
1323         }
1324
1325         rc = lfsck_layout_store(env, com);
1326
1327         up_write(&com->lc_sem);
1328
1329         return rc;
1330 }
1331
1332 static int lfsck_layout_lock(const struct lu_env *env,
1333                              struct lfsck_component *com,
1334                              struct dt_object *obj,
1335                              struct lustre_handle *lh, __u64 bits)
1336 {
1337         struct lfsck_thread_info        *info   = lfsck_env_info(env);
1338         ldlm_policy_data_t              *policy = &info->lti_policy;
1339         struct ldlm_res_id              *resid  = &info->lti_resid;
1340         struct lfsck_instance           *lfsck  = com->lc_lfsck;
1341         __u64                            flags  = LDLM_FL_ATOMIC_CB;
1342         int                              rc;
1343
1344         LASSERT(lfsck->li_namespace != NULL);
1345
1346         memset(policy, 0, sizeof(*policy));
1347         policy->l_inodebits.bits = bits;
1348         fid_build_reg_res_name(lfsck_dto2fid(obj), resid);
1349         rc = ldlm_cli_enqueue_local(lfsck->li_namespace, resid, LDLM_IBITS,
1350                                     policy, LCK_EX, &flags, ldlm_blocking_ast,
1351                                     ldlm_completion_ast, NULL, NULL, 0,
1352                                     LVB_T_NONE, NULL, lh);
1353         if (rc == ELDLM_OK) {
1354                 rc = 0;
1355         } else {
1356                 memset(lh, 0, sizeof(*lh));
1357                 rc = -EIO;
1358         }
1359
1360         return rc;
1361 }
1362
1363 static void lfsck_layout_unlock(struct lustre_handle *lh)
1364 {
1365         if (lustre_handle_is_used(lh)) {
1366                 ldlm_lock_decref(lh, LCK_EX);
1367                 memset(lh, 0, sizeof(*lh));
1368         }
1369 }
1370
1371 static int lfsck_layout_scan_orphan(const struct lu_env *env,
1372                                     struct lfsck_component *com,
1373                                     struct lfsck_tgt_desc *ltd)
1374 {
1375         /* XXX: To be extended in other patch. */
1376
1377         return 0;
1378 }
1379
1380 static int lfsck_layout_assistant(void *args)
1381 {
1382         struct lfsck_thread_args        *lta     = args;
1383         struct lu_env                   *env     = &lta->lta_env;
1384         struct lfsck_component          *com     = lta->lta_com;
1385         struct lfsck_instance           *lfsck   = lta->lta_lfsck;
1386         struct lfsck_bookmark           *bk      = &lfsck->li_bookmark_ram;
1387         struct lfsck_position           *pos     = &com->lc_pos_start;
1388         struct lfsck_thread_info        *info    = lfsck_env_info(env);
1389         struct lfsck_request            *lr      = &info->lti_lr;
1390         struct lfsck_layout_master_data *llmd    = com->lc_data;
1391         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
1392         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
1393         struct lfsck_layout_req         *llr;
1394         struct l_wait_info               lwi     = { 0 };
1395         int                              rc      = 0;
1396         int                              rc1     = 0;
1397         __u32                            flags;
1398         ENTRY;
1399
1400         if (lta->lta_lsp->lsp_start != NULL)
1401                 flags  = lta->lta_lsp->lsp_start->ls_flags;
1402         else
1403                 flags = bk->lb_param;
1404         memset(lr, 0, sizeof(*lr));
1405         lr->lr_event = LE_START;
1406         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
1407         lr->lr_valid = LSV_SPEED_LIMIT | LSV_ERROR_HANDLE | LSV_DRYRUN |
1408                        LSV_ASYNC_WINDOWS;
1409         lr->lr_speed = bk->lb_speed_limit;
1410         lr->lr_version = bk->lb_version;
1411         lr->lr_param = bk->lb_param;
1412         lr->lr_async_windows = bk->lb_async_windows;
1413         if (pos->lp_oit_cookie <= 1)
1414                 lr->lr_param |= LPF_RESET;
1415
1416         rc = lfsck_layout_master_notify_others(env, com, lr, flags);
1417         if (rc != 0) {
1418                 CERROR("%s: fail to notify others for layout start: rc = %d\n",
1419                        lfsck_lfsck2name(lfsck), rc);
1420                 GOTO(fini, rc);
1421         }
1422
1423         spin_lock(&llmd->llmd_lock);
1424         thread_set_flags(athread, SVC_RUNNING);
1425         spin_unlock(&llmd->llmd_lock);
1426         wake_up_all(&mthread->t_ctl_waitq);
1427
1428         while (1) {
1429                 while (!list_empty(&llmd->llmd_req_list)) {
1430                         bool wakeup = false;
1431
1432                         if (unlikely(llmd->llmd_exit))
1433                                 GOTO(cleanup1, rc = llmd->llmd_post_result);
1434
1435                         /* XXX: To be extended in other patch.
1436                          *
1437                          * Compare the OST side attribute with local attribute,
1438                          * and fix it if found inconsistency. */
1439
1440                         spin_lock(&llmd->llmd_lock);
1441                         llr = list_entry(llmd->llmd_req_list.next,
1442                                          struct lfsck_layout_req,
1443                                          llr_list);
1444                         list_del_init(&llr->llr_list);
1445                         if (bk->lb_async_windows != 0 &&
1446                             llmd->llmd_prefetched >= bk->lb_async_windows)
1447                                 wakeup = true;
1448
1449                         llmd->llmd_prefetched--;
1450                         spin_unlock(&llmd->llmd_lock);
1451                         if (wakeup)
1452                                 wake_up_all(&mthread->t_ctl_waitq);
1453
1454                         lfsck_layout_req_fini(env, llr);
1455                 }
1456
1457                 /* Wakeup the master engine if it is waiting in checkpoint. */
1458                 wake_up_all(&mthread->t_ctl_waitq);
1459
1460                 l_wait_event(athread->t_ctl_waitq,
1461                              !lfsck_layout_req_empty(llmd) ||
1462                              llmd->llmd_exit ||
1463                              llmd->llmd_to_post ||
1464                              llmd->llmd_to_double_scan,
1465                              &lwi);
1466
1467                 if (unlikely(llmd->llmd_exit))
1468                         GOTO(cleanup1, rc = llmd->llmd_post_result);
1469
1470                 if (!list_empty(&llmd->llmd_req_list))
1471                         continue;
1472
1473                 if (llmd->llmd_to_post) {
1474                         llmd->llmd_to_post = 0;
1475                         LASSERT(llmd->llmd_post_result > 0);
1476
1477                         memset(lr, 0, sizeof(*lr));
1478                         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
1479                         lr->lr_event = LE_PHASE1_DONE;
1480                         lr->lr_status = llmd->llmd_post_result;
1481                         rc = lfsck_layout_master_notify_others(env, com, lr, 0);
1482                         if (rc != 0)
1483                                 CERROR("%s: failed to notify others "
1484                                        "for layout post: rc = %d\n",
1485                                        lfsck_lfsck2name(lfsck), rc);
1486
1487                         /* Wakeup the master engine to go ahead. */
1488                         wake_up_all(&mthread->t_ctl_waitq);
1489                 }
1490
1491                 if (llmd->llmd_to_double_scan) {
1492                         llmd->llmd_to_double_scan = 0;
1493                         atomic_inc(&lfsck->li_double_scan_count);
1494                         llmd->llmd_in_double_scan = 1;
1495                         wake_up_all(&mthread->t_ctl_waitq);
1496
1497                         while (llmd->llmd_in_double_scan) {
1498                                 struct lfsck_tgt_descs  *ltds =
1499                                                         &lfsck->li_ost_descs;
1500                                 struct lfsck_tgt_desc   *ltd;
1501
1502                                 rc = lfsck_layout_master_query_others(env, com);
1503                                 if (lfsck_layout_master_to_orphan(llmd))
1504                                         goto orphan;
1505
1506                                 if (rc < 0)
1507                                         GOTO(cleanup2, rc);
1508
1509                                 /* Pull LFSCK status on related targets once
1510                                  * per 30 seconds if we are not notified. */
1511                                 lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(30),
1512                                                            cfs_time_seconds(1),
1513                                                            NULL, NULL);
1514                                 rc = l_wait_event(athread->t_ctl_waitq,
1515                                         lfsck_layout_master_to_orphan(llmd) ||
1516                                         llmd->llmd_exit ||
1517                                         !thread_is_running(mthread),
1518                                         &lwi);
1519
1520                                 if (unlikely(llmd->llmd_exit ||
1521                                              !thread_is_running(mthread)))
1522                                         GOTO(cleanup2, rc = 0);
1523
1524                                 if (rc == -ETIMEDOUT)
1525                                         continue;
1526
1527                                 if (rc < 0)
1528                                         GOTO(cleanup2, rc);
1529
1530 orphan:
1531                                 spin_lock(&ltds->ltd_lock);
1532                                 while (!list_empty(
1533                                                 &llmd->llmd_ost_phase2_list)) {
1534                                         ltd = list_entry(
1535                                               llmd->llmd_ost_phase2_list.next,
1536                                               struct lfsck_tgt_desc,
1537                                               ltd_layout_phase_list);
1538                                         list_del_init(
1539                                                 &ltd->ltd_layout_phase_list);
1540                                         spin_unlock(&ltds->ltd_lock);
1541
1542                                         rc = lfsck_layout_scan_orphan(env, com,
1543                                                                       ltd);
1544                                         if (rc != 0 &&
1545                                             bk->lb_param & LPF_FAILOUT)
1546                                                 GOTO(cleanup2, rc);
1547
1548                                         if (unlikely(llmd->llmd_exit ||
1549                                                 !thread_is_running(mthread)))
1550                                                 GOTO(cleanup2, rc = 0);
1551
1552                                         spin_lock(&ltds->ltd_lock);
1553                                 }
1554
1555                                 if (list_empty(&llmd->llmd_ost_phase1_list)) {
1556                                         spin_unlock(&ltds->ltd_lock);
1557                                         GOTO(cleanup2, rc = 1);
1558                                 }
1559                                 spin_unlock(&ltds->ltd_lock);
1560                         }
1561                 }
1562         }
1563
1564 cleanup1:
1565         /* Cleanup the unfinished requests. */
1566         spin_lock(&llmd->llmd_lock);
1567         while (!list_empty(&llmd->llmd_req_list)) {
1568                 llr = list_entry(llmd->llmd_req_list.next,
1569                                  struct lfsck_layout_req,
1570                                  llr_list);
1571                 list_del_init(&llr->llr_list);
1572                 llmd->llmd_prefetched--;
1573                 spin_unlock(&llmd->llmd_lock);
1574                 lfsck_layout_req_fini(env, llr);
1575                 spin_lock(&llmd->llmd_lock);
1576         }
1577         spin_unlock(&llmd->llmd_lock);
1578
1579         LASSERTF(llmd->llmd_prefetched == 0, "unmatched prefeteched objs %d\n",
1580                  llmd->llmd_prefetched);
1581
1582 cleanup2:
1583         memset(lr, 0, sizeof(*lr));
1584         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
1585         if (rc > 0) {
1586                 lr->lr_event = LE_PHASE2_DONE;
1587                 flags = 0;
1588                 lr->lr_status = rc;
1589         } else if (rc == 0) {
1590                 lr->lr_event = LE_STOP;
1591                 if (lfsck->li_status == LS_PAUSED ||
1592                     lfsck->li_status == LS_CO_PAUSED) {
1593                         flags = 0;
1594                         lr->lr_status = LS_CO_PAUSED;
1595                 } else if (lfsck->li_status == LS_STOPPED ||
1596                          lfsck->li_status == LS_CO_STOPPED) {
1597                         flags = lfsck->li_flags;
1598                         if (flags & LPF_BROADCAST)
1599                                 lr->lr_status = LS_STOPPED;
1600                         else
1601                                 lr->lr_status = LS_CO_STOPPED;
1602                 } else {
1603                         LBUG();
1604                 }
1605         } else {
1606                 lr->lr_event = LE_STOP;
1607                 flags = 0;
1608                 lr->lr_status = LS_CO_FAILED;
1609         }
1610
1611         rc1 = lfsck_layout_master_notify_others(env, com, lr, flags);
1612         if (rc1 != 0) {
1613                 CERROR("%s: failed to notify others for layout quit: rc = %d\n",
1614                        lfsck_lfsck2name(lfsck), rc1);
1615                 rc = rc1;
1616         }
1617
1618         /* Under force exit case, some requests may be just freed without
1619          * verification, those objects should be re-handled when next run.
1620          * So not update the on-disk tracing file under such case. */
1621         if (!llmd->llmd_exit)
1622                 rc1 = lfsck_layout_double_scan_result(env, com, rc);
1623
1624 fini:
1625         if (llmd->llmd_in_double_scan)
1626                 atomic_dec(&lfsck->li_double_scan_count);
1627
1628         spin_lock(&llmd->llmd_lock);
1629         llmd->llmd_assistant_status = (rc1 != 0 ? rc1 : rc);
1630         thread_set_flags(athread, SVC_STOPPED);
1631         wake_up_all(&mthread->t_ctl_waitq);
1632         spin_unlock(&llmd->llmd_lock);
1633         lfsck_thread_args_fini(lta);
1634
1635         return rc;
1636 }
1637
1638 static int
1639 lfsck_layout_slave_async_interpret(const struct lu_env *env,
1640                                    struct ptlrpc_request *req,
1641                                    void *args, int rc)
1642 {
1643         struct lfsck_layout_slave_async_args *llsaa = args;
1644         struct obd_export                    *exp   = llsaa->llsaa_exp;
1645         struct lfsck_component               *com   = llsaa->llsaa_com;
1646         struct lfsck_layout_slave_target     *llst  = llsaa->llsaa_llst;
1647         struct lfsck_layout_slave_data       *llsd  = com->lc_data;
1648         bool                                  done  = false;
1649
1650         if (rc != 0) {
1651                 /* It is quite probably caused by target crash,
1652                  * to make the LFSCK can go ahead, assume that
1653                  * the target finished the LFSCK prcoessing. */
1654                 done = true;
1655         } else {
1656                 struct lfsck_reply *lr;
1657
1658                 lr = req_capsule_server_get(&req->rq_pill, &RMF_LFSCK_REPLY);
1659                 if (lr->lr_status != LS_SCANNING_PHASE1 &&
1660                     lr->lr_status != LS_SCANNING_PHASE2)
1661                         done = true;
1662         }
1663         if (done)
1664                 lfsck_layout_llst_del(llsd, llst);
1665         lfsck_layout_llst_put(llst);
1666         lfsck_component_put(env, com);
1667         class_export_put(exp);
1668
1669         return 0;
1670 }
1671
1672 static int lfsck_layout_async_query(const struct lu_env *env,
1673                                     struct lfsck_component *com,
1674                                     struct obd_export *exp,
1675                                     struct lfsck_layout_slave_target *llst,
1676                                     struct lfsck_request *lr,
1677                                     struct ptlrpc_request_set *set)
1678 {
1679         struct lfsck_layout_slave_async_args *llsaa;
1680         struct ptlrpc_request                *req;
1681         struct lfsck_request                 *tmp;
1682         int                                   rc;
1683         ENTRY;
1684
1685         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LFSCK_QUERY);
1686         if (req == NULL)
1687                 RETURN(-ENOMEM);
1688
1689         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, LFSCK_QUERY);
1690         if (rc != 0) {
1691                 ptlrpc_request_free(req);
1692                 RETURN(rc);
1693         }
1694
1695         tmp = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
1696         *tmp = *lr;
1697         ptlrpc_request_set_replen(req);
1698
1699         llsaa = ptlrpc_req_async_args(req);
1700         llsaa->llsaa_exp = exp;
1701         llsaa->llsaa_com = lfsck_component_get(com);
1702         llsaa->llsaa_llst = llst;
1703         req->rq_interpret_reply = lfsck_layout_slave_async_interpret;
1704         ptlrpc_set_add_req(set, req);
1705
1706         RETURN(0);
1707 }
1708
1709 static int lfsck_layout_async_notify(const struct lu_env *env,
1710                                      struct obd_export *exp,
1711                                      struct lfsck_request *lr,
1712                                      struct ptlrpc_request_set *set)
1713 {
1714         struct ptlrpc_request   *req;
1715         struct lfsck_request    *tmp;
1716         int                      rc;
1717         ENTRY;
1718
1719         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LFSCK_NOTIFY);
1720         if (req == NULL)
1721                 RETURN(-ENOMEM);
1722
1723         rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, LFSCK_NOTIFY);
1724         if (rc != 0) {
1725                 ptlrpc_request_free(req);
1726                 RETURN(rc);
1727         }
1728
1729         tmp = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
1730         *tmp = *lr;
1731         ptlrpc_request_set_replen(req);
1732         ptlrpc_set_add_req(set, req);
1733
1734         RETURN(0);
1735 }
1736
1737 static int
1738 lfsck_layout_slave_query_master(const struct lu_env *env,
1739                                 struct lfsck_component *com)
1740 {
1741         struct lfsck_request             *lr    = &lfsck_env_info(env)->lti_lr;
1742         struct lfsck_instance            *lfsck = com->lc_lfsck;
1743         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
1744         struct lfsck_layout_slave_target *llst;
1745         struct obd_export                *exp;
1746         struct ptlrpc_request_set        *set;
1747         int                               cnt   = 0;
1748         int                               rc    = 0;
1749         int                               rc1   = 0;
1750         ENTRY;
1751
1752         set = ptlrpc_prep_set();
1753         if (set == NULL)
1754                 RETURN(-ENOMEM);
1755
1756         memset(lr, 0, sizeof(*lr));
1757         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
1758         lr->lr_event = LE_QUERY;
1759         lr->lr_active = LT_LAYOUT;
1760
1761         llsd->llsd_touch_gen++;
1762         spin_lock(&llsd->llsd_lock);
1763         while (!list_empty(&llsd->llsd_master_list)) {
1764                 llst = list_entry(llsd->llsd_master_list.next,
1765                                   struct lfsck_layout_slave_target,
1766                                   llst_list);
1767                 if (llst->llst_gen == llsd->llsd_touch_gen)
1768                         break;
1769
1770                 llst->llst_gen = llsd->llsd_touch_gen;
1771                 list_del(&llst->llst_list);
1772                 list_add_tail(&llst->llst_list,
1773                               &llsd->llsd_master_list);
1774                 atomic_inc(&llst->llst_ref);
1775                 spin_unlock(&llsd->llsd_lock);
1776
1777                 exp = lustre_find_lwp_by_index(lfsck->li_obd->obd_name,
1778                                                llst->llst_index);
1779                 if (exp == NULL) {
1780                         lfsck_layout_llst_del(llsd, llst);
1781                         lfsck_layout_llst_put(llst);
1782                         spin_lock(&llsd->llsd_lock);
1783                         continue;
1784                 }
1785
1786                 rc = lfsck_layout_async_query(env, com, exp, llst, lr, set);
1787                 if (rc != 0) {
1788                         CERROR("%s: slave fail to query %s for layout: "
1789                                "rc = %d\n", lfsck_lfsck2name(lfsck),
1790                                exp->exp_obd->obd_name, rc);
1791                         rc1 = rc;
1792                         lfsck_layout_llst_put(llst);
1793                         class_export_put(exp);
1794                 } else {
1795                         cnt++;
1796                 }
1797                 spin_lock(&llsd->llsd_lock);
1798         }
1799         spin_unlock(&llsd->llsd_lock);
1800
1801         if (cnt > 0)
1802                 rc = ptlrpc_set_wait(set);
1803         ptlrpc_set_destroy(set);
1804
1805         RETURN(rc1 != 0 ? rc1 : rc);
1806 }
1807
1808 static void
1809 lfsck_layout_slave_notify_master(const struct lu_env *env,
1810                                  struct lfsck_component *com,
1811                                  enum lfsck_events event, int result)
1812 {
1813         struct lfsck_instance            *lfsck = com->lc_lfsck;
1814         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
1815         struct lfsck_request             *lr    = &lfsck_env_info(env)->lti_lr;
1816         struct lfsck_layout_slave_target *llst;
1817         struct obd_export                *exp;
1818         struct ptlrpc_request_set        *set;
1819         int                               cnt   = 0;
1820         int                               rc;
1821         ENTRY;
1822
1823         set = ptlrpc_prep_set();
1824         if (set == NULL)
1825                 RETURN_EXIT;
1826
1827         memset(lr, 0, sizeof(*lr));
1828         lr->lr_event = event;
1829         lr->lr_flags = LEF_FROM_OST;
1830         lr->lr_status = result;
1831         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
1832         lr->lr_active = LT_LAYOUT;
1833         llsd->llsd_touch_gen++;
1834         spin_lock(&llsd->llsd_lock);
1835         while (!list_empty(&llsd->llsd_master_list)) {
1836                 llst = list_entry(llsd->llsd_master_list.next,
1837                                   struct lfsck_layout_slave_target,
1838                                   llst_list);
1839                 if (llst->llst_gen == llsd->llsd_touch_gen)
1840                         break;
1841
1842                 llst->llst_gen = llsd->llsd_touch_gen;
1843                 list_del(&llst->llst_list);
1844                 list_add_tail(&llst->llst_list,
1845                               &llsd->llsd_master_list);
1846                 atomic_inc(&llst->llst_ref);
1847                 spin_unlock(&llsd->llsd_lock);
1848
1849                 exp = lustre_find_lwp_by_index(lfsck->li_obd->obd_name,
1850                                                llst->llst_index);
1851                 if (exp == NULL) {
1852                         lfsck_layout_llst_del(llsd, llst);
1853                         lfsck_layout_llst_put(llst);
1854                         spin_lock(&llsd->llsd_lock);
1855                         continue;
1856                 }
1857
1858                 rc = lfsck_layout_async_notify(env, exp, lr, set);
1859                 if (rc != 0)
1860                         CERROR("%s: slave fail to notify %s for layout: "
1861                                "rc = %d\n", lfsck_lfsck2name(lfsck),
1862                                exp->exp_obd->obd_name, rc);
1863                 else
1864                         cnt++;
1865                 lfsck_layout_llst_put(llst);
1866                 class_export_put(exp);
1867                 spin_lock(&llsd->llsd_lock);
1868         }
1869         spin_unlock(&llsd->llsd_lock);
1870
1871         if (cnt > 0)
1872                 rc = ptlrpc_set_wait(set);
1873
1874         ptlrpc_set_destroy(set);
1875
1876         RETURN_EXIT;
1877 }
1878
1879 /* layout APIs */
1880
1881 static int lfsck_layout_reset(const struct lu_env *env,
1882                               struct lfsck_component *com, bool init)
1883 {
1884         struct lfsck_layout     *lo    = com->lc_file_ram;
1885         int                      rc;
1886
1887         down_write(&com->lc_sem);
1888         if (init) {
1889                 memset(lo, 0, com->lc_file_size);
1890         } else {
1891                 __u32 count = lo->ll_success_count;
1892                 __u64 last_time = lo->ll_time_last_complete;
1893
1894                 memset(lo, 0, com->lc_file_size);
1895                 lo->ll_success_count = count;
1896                 lo->ll_time_last_complete = last_time;
1897         }
1898
1899         lo->ll_magic = LFSCK_LAYOUT_MAGIC;
1900         lo->ll_status = LS_INIT;
1901
1902         rc = lfsck_layout_store(env, com);
1903         up_write(&com->lc_sem);
1904
1905         return rc;
1906 }
1907
1908 static void lfsck_layout_fail(const struct lu_env *env,
1909                               struct lfsck_component *com, bool new_checked)
1910 {
1911         struct lfsck_layout *lo = com->lc_file_ram;
1912
1913         down_write(&com->lc_sem);
1914         if (new_checked)
1915                 com->lc_new_checked++;
1916         lo->ll_objs_failed_phase1++;
1917         if (lo->ll_pos_first_inconsistent == 0) {
1918                 struct lfsck_instance *lfsck = com->lc_lfsck;
1919
1920                 lo->ll_pos_first_inconsistent =
1921                         lfsck->li_obj_oit->do_index_ops->dio_it.store(env,
1922                                                         lfsck->li_di_oit);
1923         }
1924         up_write(&com->lc_sem);
1925 }
1926
1927 static int lfsck_layout_master_checkpoint(const struct lu_env *env,
1928                                           struct lfsck_component *com, bool init)
1929 {
1930         struct lfsck_instance           *lfsck   = com->lc_lfsck;
1931         struct lfsck_layout             *lo      = com->lc_file_ram;
1932         struct lfsck_layout_master_data *llmd    = com->lc_data;
1933         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
1934         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
1935         struct l_wait_info               lwi     = { 0 };
1936         int                              rc;
1937
1938         if (com->lc_new_checked == 0 && !init)
1939                 return 0;
1940
1941         l_wait_event(mthread->t_ctl_waitq,
1942                      list_empty(&llmd->llmd_req_list) ||
1943                      !thread_is_running(mthread) ||
1944                      thread_is_stopped(athread),
1945                      &lwi);
1946
1947         if (!thread_is_running(mthread) || thread_is_stopped(athread))
1948                 return 0;
1949
1950         down_write(&com->lc_sem);
1951         if (init) {
1952                 lo->ll_pos_latest_start = lfsck->li_pos_current.lp_oit_cookie;
1953         } else {
1954                 lo->ll_pos_last_checkpoint =
1955                                         lfsck->li_pos_current.lp_oit_cookie;
1956                 lo->ll_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
1957                                 HALF_SEC - lfsck->li_time_last_checkpoint);
1958                 lo->ll_time_last_checkpoint = cfs_time_current_sec();
1959                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
1960                 com->lc_new_checked = 0;
1961         }
1962
1963         rc = lfsck_layout_store(env, com);
1964         up_write(&com->lc_sem);
1965
1966         return rc;
1967 }
1968
1969 static int lfsck_layout_slave_checkpoint(const struct lu_env *env,
1970                                          struct lfsck_component *com, bool init)
1971 {
1972         struct lfsck_instance   *lfsck = com->lc_lfsck;
1973         struct lfsck_layout     *lo    = com->lc_file_ram;
1974         int                      rc;
1975
1976         if (com->lc_new_checked == 0 && !init)
1977                 return 0;
1978
1979         down_write(&com->lc_sem);
1980
1981         if (init) {
1982                 lo->ll_pos_latest_start = lfsck->li_pos_current.lp_oit_cookie;
1983         } else {
1984                 lo->ll_pos_last_checkpoint =
1985                                         lfsck->li_pos_current.lp_oit_cookie;
1986                 lo->ll_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
1987                                 HALF_SEC - lfsck->li_time_last_checkpoint);
1988                 lo->ll_time_last_checkpoint = cfs_time_current_sec();
1989                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
1990                 com->lc_new_checked = 0;
1991         }
1992
1993         rc = lfsck_layout_store(env, com);
1994
1995         up_write(&com->lc_sem);
1996
1997         return rc;
1998 }
1999
2000 static int lfsck_layout_prep(const struct lu_env *env,
2001                              struct lfsck_component *com)
2002 {
2003         struct lfsck_instance   *lfsck  = com->lc_lfsck;
2004         struct lfsck_layout     *lo     = com->lc_file_ram;
2005         struct lfsck_position   *pos    = &com->lc_pos_start;
2006
2007         fid_zero(&pos->lp_dir_parent);
2008         pos->lp_dir_cookie = 0;
2009         if (lo->ll_status == LS_COMPLETED ||
2010             lo->ll_status == LS_PARTIAL) {
2011                 int rc;
2012
2013                 rc = lfsck_layout_reset(env, com, false);
2014                 if (rc != 0)
2015                         return rc;
2016         }
2017
2018         down_write(&com->lc_sem);
2019
2020         lo->ll_time_latest_start = cfs_time_current_sec();
2021
2022         spin_lock(&lfsck->li_lock);
2023         if (lo->ll_flags & LF_SCANNED_ONCE) {
2024                 if (!lfsck->li_drop_dryrun ||
2025                     lo->ll_pos_first_inconsistent == 0) {
2026                         lo->ll_status = LS_SCANNING_PHASE2;
2027                         list_del_init(&com->lc_link);
2028                         list_add_tail(&com->lc_link,
2029                                       &lfsck->li_list_double_scan);
2030                         pos->lp_oit_cookie = 0;
2031                 } else {
2032                         int i;
2033
2034                         lo->ll_status = LS_SCANNING_PHASE1;
2035                         lo->ll_run_time_phase1 = 0;
2036                         lo->ll_run_time_phase2 = 0;
2037                         lo->ll_objs_checked_phase1 = 0;
2038                         lo->ll_objs_checked_phase2 = 0;
2039                         lo->ll_objs_failed_phase1 = 0;
2040                         lo->ll_objs_failed_phase2 = 0;
2041                         for (i = 0; i < LLIT_MAX; i++)
2042                                 lo->ll_objs_repaired[i] = 0;
2043
2044                         pos->lp_oit_cookie = lo->ll_pos_first_inconsistent;
2045                 }
2046         } else {
2047                 lo->ll_status = LS_SCANNING_PHASE1;
2048                 if (!lfsck->li_drop_dryrun ||
2049                     lo->ll_pos_first_inconsistent == 0)
2050                         pos->lp_oit_cookie = lo->ll_pos_last_checkpoint + 1;
2051                 else
2052                         pos->lp_oit_cookie = lo->ll_pos_first_inconsistent;
2053         }
2054         spin_unlock(&lfsck->li_lock);
2055
2056         up_write(&com->lc_sem);
2057
2058         return 0;
2059 }
2060
2061 static int lfsck_layout_slave_prep(const struct lu_env *env,
2062                                    struct lfsck_component *com,
2063                                    struct lfsck_start_param *lsp)
2064 {
2065         struct lfsck_layout             *lo     = com->lc_file_ram;
2066         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
2067         int                              rc;
2068
2069         /* XXX: For a new scanning, generate OST-objects
2070          *      bitmap for orphan detection. */
2071
2072         rc = lfsck_layout_prep(env, com);
2073         if (rc != 0 || lo->ll_status != LS_SCANNING_PHASE1 ||
2074             !lsp->lsp_index_valid)
2075                 return rc;
2076
2077         rc = lfsck_layout_llst_add(llsd, lsp->lsp_index);
2078
2079         return rc;
2080 }
2081
2082 static int lfsck_layout_master_prep(const struct lu_env *env,
2083                                     struct lfsck_component *com,
2084                                     struct lfsck_start_param *lsp)
2085 {
2086         struct lfsck_instance           *lfsck   = com->lc_lfsck;
2087         struct lfsck_layout_master_data *llmd    = com->lc_data;
2088         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
2089         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
2090         struct lfsck_thread_args        *lta;
2091         long                             rc;
2092         ENTRY;
2093
2094         rc = lfsck_layout_prep(env, com);
2095         if (rc != 0)
2096                 RETURN(rc);
2097
2098         llmd->llmd_assistant_status = 0;
2099         llmd->llmd_post_result = 0;
2100         llmd->llmd_to_post = 0;
2101         llmd->llmd_to_double_scan = 0;
2102         llmd->llmd_in_double_scan = 0;
2103         llmd->llmd_exit = 0;
2104         thread_set_flags(athread, 0);
2105
2106         lta = lfsck_thread_args_init(lfsck, com, lsp);
2107         if (IS_ERR(lta))
2108                 RETURN(PTR_ERR(lta));
2109
2110         rc = PTR_ERR(kthread_run(lfsck_layout_assistant, lta, "lfsck_layout"));
2111         if (IS_ERR_VALUE(rc)) {
2112                 CERROR("%s: Cannot start LFSCK layout assistant thread: "
2113                        "rc = %ld\n", lfsck_lfsck2name(lfsck), rc);
2114                 lfsck_thread_args_fini(lta);
2115         } else {
2116                 struct l_wait_info lwi = { 0 };
2117
2118                 l_wait_event(mthread->t_ctl_waitq,
2119                              thread_is_running(athread) ||
2120                              thread_is_stopped(athread),
2121                              &lwi);
2122                 if (unlikely(!thread_is_running(athread)))
2123                         rc = llmd->llmd_assistant_status;
2124                 else
2125                         rc = 0;
2126         }
2127
2128         RETURN(rc);
2129 }
2130
2131 /* Pre-fetch the attribute for each stripe in the given layout EA. */
2132 static int lfsck_layout_scan_stripes(const struct lu_env *env,
2133                                      struct lfsck_component *com,
2134                                      struct dt_object *parent,
2135                                      struct lov_mds_md_v1 *lmm)
2136 {
2137         struct lfsck_thread_info        *info    = lfsck_env_info(env);
2138         struct lfsck_instance           *lfsck   = com->lc_lfsck;
2139         struct lfsck_bookmark           *bk      = &lfsck->li_bookmark_ram;
2140         struct lfsck_layout             *lo      = com->lc_file_ram;
2141         struct lfsck_layout_master_data *llmd    = com->lc_data;
2142         struct lfsck_layout_object      *llo     = NULL;
2143         struct lov_ost_data_v1          *objs;
2144         struct lfsck_tgt_descs          *ltds    = &lfsck->li_ost_descs;
2145         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
2146         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
2147                 struct l_wait_info       lwi     = { 0 };
2148         struct lu_buf                   *buf;
2149         int                              rc      = 0;
2150         int                              i;
2151         __u16                            count;
2152         __u16                            gen;
2153         ENTRY;
2154
2155         buf = lfsck_buf_get(env, &info->lti_pfid,
2156                             sizeof(struct filter_fid_old));
2157         count = le16_to_cpu(lmm->lmm_stripe_count);
2158         gen = le16_to_cpu(lmm->lmm_layout_gen);
2159         if (le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_V1)
2160                 objs = &(lmm->lmm_objects[0]);
2161         else
2162                 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
2163
2164         for (i = 0; i < count; i++, objs++) {
2165                 struct lu_fid           *fid    = &info->lti_fid;
2166                 struct ost_id           *oi     = &info->lti_oi;
2167                 struct lfsck_layout_req *llr;
2168                 struct lfsck_tgt_desc   *tgt    = NULL;
2169                 struct dt_object        *cobj   = NULL;
2170                 __u32                    index  =
2171                                         le32_to_cpu(objs->l_ost_idx);
2172                 bool                     wakeup = false;
2173
2174                 l_wait_event(mthread->t_ctl_waitq,
2175                              bk->lb_async_windows == 0 ||
2176                              llmd->llmd_prefetched < bk->lb_async_windows ||
2177                              !thread_is_running(mthread) ||
2178                              thread_is_stopped(athread),
2179                              &lwi);
2180
2181                 if (unlikely(!thread_is_running(mthread)) ||
2182                              thread_is_stopped(athread))
2183                         GOTO(out, rc = 0);
2184
2185                 ostid_le_to_cpu(&objs->l_ost_oi, oi);
2186                 ostid_to_fid(fid, oi, index);
2187                 tgt = lfsck_tgt_get(ltds, index);
2188                 if (unlikely(tgt == NULL)) {
2189                         lo->ll_flags |= LF_INCOMPLETE;
2190                         goto next;
2191                 }
2192
2193                 cobj = lfsck_object_find_by_dev(env, tgt->ltd_tgt, fid);
2194                 if (IS_ERR(cobj)) {
2195                         rc = PTR_ERR(cobj);
2196                         goto next;
2197                 }
2198
2199                 rc = dt_declare_attr_get(env, cobj, BYPASS_CAPA);
2200                 if (rc != 0)
2201                         goto next;
2202
2203                 rc = dt_declare_xattr_get(env, cobj, buf, XATTR_NAME_FID,
2204                                           BYPASS_CAPA);
2205                 if (rc != 0)
2206                         goto next;
2207
2208                 if (llo == NULL) {
2209                         llo = lfsck_layout_object_init(env, parent, gen);
2210                         if (IS_ERR(llo)) {
2211                                 rc = PTR_ERR(llo);
2212                                 goto next;
2213                         }
2214                 }
2215
2216                 llr = lfsck_layout_req_init(llo, cobj, index, i);
2217                 if (IS_ERR(llr)) {
2218                         rc = PTR_ERR(llr);
2219                         goto next;
2220                 }
2221
2222                 cobj = NULL;
2223                 spin_lock(&llmd->llmd_lock);
2224                 if (llmd->llmd_assistant_status < 0) {
2225                         spin_unlock(&llmd->llmd_lock);
2226                         lfsck_layout_req_fini(env, llr);
2227                         lfsck_tgt_put(tgt);
2228                         RETURN(llmd->llmd_assistant_status);
2229                 }
2230
2231                 list_add_tail(&llr->llr_list, &llmd->llmd_req_list);
2232                 if (llmd->llmd_prefetched == 0)
2233                         wakeup = true;
2234
2235                 llmd->llmd_prefetched++;
2236                 spin_unlock(&llmd->llmd_lock);
2237                 if (wakeup)
2238                         wake_up_all(&athread->t_ctl_waitq);
2239
2240 next:
2241                 down_write(&com->lc_sem);
2242                 com->lc_new_checked++;
2243                 if (rc < 0)
2244                         lo->ll_objs_failed_phase1++;
2245                 up_write(&com->lc_sem);
2246
2247                 if (cobj != NULL && !IS_ERR(cobj))
2248                         lu_object_put(env, &cobj->do_lu);
2249
2250                 if (likely(tgt != NULL))
2251                         lfsck_tgt_put(tgt);
2252
2253                 if (rc < 0 && bk->lb_param & LPF_FAILOUT)
2254                         GOTO(out, rc);
2255         }
2256
2257         GOTO(out, rc = 0);
2258
2259 out:
2260         if (llo != NULL && !IS_ERR(llo))
2261                 lfsck_layout_object_put(env, llo);
2262
2263         return rc;
2264 }
2265
2266 /* For the given object, read its layout EA locally. For each stripe, pre-fetch
2267  * the OST-object's attribute and generate an structure lfsck_layout_req on the
2268  * list ::llmd_req_list.
2269  *
2270  * For each request on above list, the lfsck_layout_assistant thread compares
2271  * the OST side attribute with local attribute, if inconsistent, then repair it.
2272  *
2273  * All above processing is async mode with pipeline. */
2274 static int lfsck_layout_master_exec_oit(const struct lu_env *env,
2275                                         struct lfsck_component *com,
2276                                         struct dt_object *obj)
2277 {
2278         struct lfsck_thread_info        *info   = lfsck_env_info(env);
2279         struct ost_id                   *oi     = &info->lti_oi;
2280         struct lfsck_layout             *lo     = com->lc_file_ram;
2281         struct lfsck_layout_master_data *llmd   = com->lc_data;
2282         struct lfsck_instance           *lfsck  = com->lc_lfsck;
2283         struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
2284         struct thandle                  *handle = NULL;
2285         struct lu_buf                   *buf    = &info->lti_big_buf;
2286         struct lov_mds_md_v1            *lmm    = NULL;
2287         struct dt_device                *dev    = lfsck->li_bottom;
2288         struct lustre_handle             lh     = { 0 };
2289         ssize_t                          buflen = buf->lb_len;
2290         int                              rc     = 0;
2291         bool                             locked = false;
2292         bool                             stripe = false;
2293         ENTRY;
2294
2295         if (!S_ISREG(lfsck_object_type(obj)))
2296                 GOTO(out, rc = 0);
2297
2298         if (llmd->llmd_assistant_status < 0)
2299                 GOTO(out, rc = -ESRCH);
2300
2301         fid_to_lmm_oi(lfsck_dto2fid(obj), oi);
2302         lmm_oi_cpu_to_le(oi, oi);
2303         dt_read_lock(env, obj, 0);
2304         locked = true;
2305
2306 again:
2307         rc = lfsck_layout_get_lovea(env, obj, buf, &buflen);
2308         if (rc <= 0)
2309                 GOTO(out, rc);
2310
2311         buf->lb_len = rc;
2312         lmm = buf->lb_buf;
2313         rc = lfsck_layout_verify_header(lmm);
2314         if (rc != 0)
2315                 GOTO(out, rc);
2316
2317         if (memcmp(oi, &lmm->lmm_oi, sizeof(*oi)) == 0)
2318                 GOTO(out, stripe = true);
2319
2320         /* Inconsistent lmm_oi, should be repaired. */
2321         CDEBUG(D_LFSCK, "Repair bad lmm_oi for "DFID"\n",
2322                PFID(lfsck_dto2fid(obj)));
2323
2324         if (bk->lb_param & LPF_DRYRUN) {
2325                 down_write(&com->lc_sem);
2326                 lo->ll_objs_repaired[LLIT_OTHERS - 1]++;
2327                 up_write(&com->lc_sem);
2328
2329                 GOTO(out, stripe = true);
2330         }
2331
2332         if (!lustre_handle_is_used(&lh)) {
2333                 dt_read_unlock(env, obj);
2334                 locked = false;
2335                 buf->lb_len = buflen;
2336                 rc = lfsck_layout_lock(env, com, obj, &lh,
2337                                        MDS_INODELOCK_LAYOUT |
2338                                        MDS_INODELOCK_XATTR);
2339                 if (rc != 0)
2340                         GOTO(out, rc);
2341
2342                 handle = dt_trans_create(env, dev);
2343                 if (IS_ERR(handle))
2344                         GOTO(out, rc = PTR_ERR(handle));
2345
2346                 rc = dt_declare_xattr_set(env, obj, buf, XATTR_NAME_LOV,
2347                                           LU_XATTR_REPLACE, handle);
2348                 if (rc != 0)
2349                         GOTO(out, rc);
2350
2351                 rc = dt_trans_start_local(env, dev, handle);
2352                 if (rc != 0)
2353                         GOTO(out, rc);
2354
2355                 dt_write_lock(env, obj, 0);
2356                 locked = true;
2357
2358                 goto again;
2359         }
2360
2361         lmm->lmm_oi = *oi;
2362         rc = dt_xattr_set(env, obj, buf, XATTR_NAME_LOV,
2363                           LU_XATTR_REPLACE, handle, BYPASS_CAPA);
2364         if (rc != 0)
2365                 GOTO(out, rc);
2366
2367         down_write(&com->lc_sem);
2368         lo->ll_objs_repaired[LLIT_OTHERS - 1]++;
2369         up_write(&com->lc_sem);
2370
2371         GOTO(out, stripe = true);
2372
2373 out:
2374         if (locked) {
2375                 if (lustre_handle_is_used(&lh))
2376                         dt_write_unlock(env, obj);
2377                 else
2378                         dt_read_unlock(env, obj);
2379         }
2380
2381         if (handle != NULL && !IS_ERR(handle))
2382                 dt_trans_stop(env, dev, handle);
2383
2384         lfsck_layout_unlock(&lh);
2385         if (stripe) {
2386                 rc = lfsck_layout_scan_stripes(env, com, obj, lmm);
2387         } else {
2388                 down_write(&com->lc_sem);
2389                 com->lc_new_checked++;
2390                 if (rc < 0)
2391                         lo->ll_objs_failed_phase1++;
2392                 up_write(&com->lc_sem);
2393         }
2394         buf->lb_len = buflen;
2395
2396         return rc;
2397 }
2398
2399 static int lfsck_layout_slave_exec_oit(const struct lu_env *env,
2400                                        struct lfsck_component *com,
2401                                        struct dt_object *obj)
2402 {
2403         struct lfsck_instance           *lfsck  = com->lc_lfsck;
2404         struct lfsck_layout             *lo     = com->lc_file_ram;
2405         const struct lu_fid             *fid    = lfsck_dto2fid(obj);
2406         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
2407         struct lfsck_layout_seq         *lls;
2408         __u64                            seq;
2409         __u64                            oid;
2410         int                              rc;
2411         ENTRY;
2412
2413         /* XXX: Update OST-objects bitmap for orphan detection. */
2414
2415         LASSERT(llsd != NULL);
2416
2417         down_write(&com->lc_sem);
2418         if (fid_is_idif(fid))
2419                 seq = 0;
2420         else if (!fid_is_norm(fid) ||
2421                  !fid_is_for_ostobj(env, lfsck->li_next, obj, fid))
2422                 GOTO(unlock, rc = 0);
2423         else
2424                 seq = fid_seq(fid);
2425         com->lc_new_checked++;
2426
2427         lls = lfsck_layout_seq_lookup(llsd, seq);
2428         if (lls == NULL) {
2429                 OBD_ALLOC_PTR(lls);
2430                 if (unlikely(lls == NULL))
2431                         GOTO(unlock, rc = -ENOMEM);
2432
2433                 INIT_LIST_HEAD(&lls->lls_list);
2434                 lls->lls_seq = seq;
2435                 rc = lfsck_layout_lastid_load(env, com, lls);
2436                 if (rc != 0) {
2437                         lo->ll_objs_failed_phase1++;
2438                         OBD_FREE_PTR(lls);
2439                         GOTO(unlock, rc);
2440                 }
2441
2442                 lfsck_layout_seq_insert(llsd, lls);
2443         }
2444
2445         if (unlikely(fid_is_last_id(fid)))
2446                 GOTO(unlock, rc = 0);
2447
2448         oid = fid_oid(fid);
2449         if (oid > lls->lls_lastid_known)
2450                 lls->lls_lastid_known = oid;
2451
2452         if (oid > lls->lls_lastid) {
2453                 if (!(lo->ll_flags & LF_CRASHED_LASTID)) {
2454                         /* OFD may create new objects during LFSCK scanning. */
2455                         rc = lfsck_layout_lastid_reload(env, com, lls);
2456                         if (unlikely(rc != 0))
2457                                 CWARN("%s: failed to reload LAST_ID for "LPX64
2458                                       ": rc = %d\n",
2459                                       lfsck_lfsck2name(com->lc_lfsck),
2460                                       lls->lls_seq, rc);
2461                         if (oid <= lls->lls_lastid)
2462                                 GOTO(unlock, rc = 0);
2463
2464                         LASSERT(lfsck->li_out_notify != NULL);
2465
2466                         lfsck->li_out_notify(env, lfsck->li_out_notify_data,
2467                                              LE_LASTID_REBUILDING);
2468                         lo->ll_flags |= LF_CRASHED_LASTID;
2469                 }
2470
2471                 lls->lls_lastid = oid;
2472                 lls->lls_dirty = 1;
2473         }
2474
2475         GOTO(unlock, rc = 0);
2476
2477 unlock:
2478         up_write(&com->lc_sem);
2479
2480         return rc;
2481 }
2482
2483 static int lfsck_layout_exec_dir(const struct lu_env *env,
2484                                  struct lfsck_component *com,
2485                                  struct dt_object *obj,
2486                                  struct lu_dirent *ent)
2487 {
2488         return 0;
2489 }
2490
2491 static int lfsck_layout_master_post(const struct lu_env *env,
2492                                     struct lfsck_component *com,
2493                                     int result, bool init)
2494 {
2495         struct lfsck_instance           *lfsck   = com->lc_lfsck;
2496         struct lfsck_layout             *lo      = com->lc_file_ram;
2497         struct lfsck_layout_master_data *llmd    = com->lc_data;
2498         struct ptlrpc_thread            *mthread = &lfsck->li_thread;
2499         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
2500         struct l_wait_info               lwi     = { 0 };
2501         int                              rc;
2502         ENTRY;
2503
2504
2505         llmd->llmd_post_result = result;
2506         llmd->llmd_to_post = 1;
2507         if (llmd->llmd_post_result <= 0)
2508                 llmd->llmd_exit = 1;
2509
2510         wake_up_all(&athread->t_ctl_waitq);
2511         l_wait_event(mthread->t_ctl_waitq,
2512                      (result > 0 && list_empty(&llmd->llmd_req_list)) ||
2513                      thread_is_stopped(athread),
2514                      &lwi);
2515
2516         if (llmd->llmd_assistant_status < 0)
2517                 result = llmd->llmd_assistant_status;
2518
2519         down_write(&com->lc_sem);
2520         spin_lock(&lfsck->li_lock);
2521         /* When LFSCK failed, there may be some prefetched objects those are
2522          * not been processed yet, we do not know the exactly position, then
2523          * just restart from last check-point next time. */
2524         if (!init && !llmd->llmd_exit)
2525                 lo->ll_pos_last_checkpoint =
2526                                         lfsck->li_pos_current.lp_oit_cookie;
2527
2528         if (result > 0) {
2529                 lo->ll_status = LS_SCANNING_PHASE2;
2530                 lo->ll_flags |= LF_SCANNED_ONCE;
2531                 lo->ll_flags &= ~LF_UPGRADE;
2532                 list_del_init(&com->lc_link);
2533                 list_add_tail(&com->lc_link, &lfsck->li_list_double_scan);
2534         } else if (result == 0) {
2535                 lo->ll_status = lfsck->li_status;
2536                 if (lo->ll_status == 0)
2537                         lo->ll_status = LS_STOPPED;
2538                 if (lo->ll_status != LS_PAUSED) {
2539                         list_del_init(&com->lc_link);
2540                         list_add_tail(&com->lc_link, &lfsck->li_list_idle);
2541                 }
2542         } else {
2543                 lo->ll_status = LS_FAILED;
2544                 list_del_init(&com->lc_link);
2545                 list_add_tail(&com->lc_link, &lfsck->li_list_idle);
2546         }
2547         spin_unlock(&lfsck->li_lock);
2548
2549         if (!init) {
2550                 lo->ll_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
2551                                 HALF_SEC - lfsck->li_time_last_checkpoint);
2552                 lo->ll_time_last_checkpoint = cfs_time_current_sec();
2553                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
2554                 com->lc_new_checked = 0;
2555         }
2556
2557         rc = lfsck_layout_store(env, com);
2558         up_write(&com->lc_sem);
2559
2560         RETURN(rc);
2561 }
2562
2563 static int lfsck_layout_slave_post(const struct lu_env *env,
2564                                    struct lfsck_component *com,
2565                                    int result, bool init)
2566 {
2567         struct lfsck_instance   *lfsck = com->lc_lfsck;
2568         struct lfsck_layout     *lo    = com->lc_file_ram;
2569         int                      rc;
2570         bool                     done  = false;
2571
2572         rc = lfsck_layout_lastid_store(env, com);
2573         if (rc != 0)
2574                 result = rc;
2575
2576         LASSERT(lfsck->li_out_notify != NULL);
2577
2578         down_write(&com->lc_sem);
2579
2580         spin_lock(&lfsck->li_lock);
2581         if (!init)
2582                 lo->ll_pos_last_checkpoint =
2583                                         lfsck->li_pos_current.lp_oit_cookie;
2584         if (result > 0) {
2585                 lo->ll_status = LS_SCANNING_PHASE2;
2586                 lo->ll_flags |= LF_SCANNED_ONCE;
2587                 if (lo->ll_flags & LF_CRASHED_LASTID) {
2588                         done = true;
2589                         lo->ll_flags &= ~LF_CRASHED_LASTID;
2590                 }
2591                 lo->ll_flags &= ~LF_UPGRADE;
2592                 list_del_init(&com->lc_link);
2593                 list_add_tail(&com->lc_link, &lfsck->li_list_double_scan);
2594         } else if (result == 0) {
2595                 lo->ll_status = lfsck->li_status;
2596                 if (lo->ll_status == 0)
2597                         lo->ll_status = LS_STOPPED;
2598                 if (lo->ll_status != LS_PAUSED) {
2599                         list_del_init(&com->lc_link);
2600                         list_add_tail(&com->lc_link, &lfsck->li_list_idle);
2601                 }
2602         } else {
2603                 lo->ll_status = LS_FAILED;
2604                 list_del_init(&com->lc_link);
2605                 list_add_tail(&com->lc_link, &lfsck->li_list_idle);
2606         }
2607         spin_unlock(&lfsck->li_lock);
2608
2609         if (done)
2610                 lfsck->li_out_notify(env, lfsck->li_out_notify_data,
2611                                      LE_LASTID_REBUILT);
2612
2613         if (!init) {
2614                 lo->ll_run_time_phase1 += cfs_duration_sec(cfs_time_current() +
2615                                 HALF_SEC - lfsck->li_time_last_checkpoint);
2616                 lo->ll_time_last_checkpoint = cfs_time_current_sec();
2617                 lo->ll_objs_checked_phase1 += com->lc_new_checked;
2618                 com->lc_new_checked = 0;
2619         }
2620
2621         rc = lfsck_layout_store(env, com);
2622
2623         up_write(&com->lc_sem);
2624
2625         lfsck_layout_slave_notify_master(env, com, LE_PHASE1_DONE, result);
2626
2627         return rc;
2628 }
2629
2630 static int lfsck_layout_dump(const struct lu_env *env,
2631                              struct lfsck_component *com, char *buf, int len)
2632 {
2633         struct lfsck_instance   *lfsck = com->lc_lfsck;
2634         struct lfsck_bookmark   *bk    = &lfsck->li_bookmark_ram;
2635         struct lfsck_layout     *lo    = com->lc_file_ram;
2636         int                      save  = len;
2637         int                      ret   = -ENOSPC;
2638         int                      rc;
2639
2640         down_read(&com->lc_sem);
2641         rc = snprintf(buf, len,
2642                       "name: lfsck_layout\n"
2643                       "magic: %#x\n"
2644                       "version: %d\n"
2645                       "status: %s\n",
2646                       lo->ll_magic,
2647                       bk->lb_version,
2648                       lfsck_status2names(lo->ll_status));
2649         if (rc <= 0)
2650                 goto out;
2651
2652         buf += rc;
2653         len -= rc;
2654         rc = lfsck_bits_dump(&buf, &len, lo->ll_flags, lfsck_flags_names,
2655                              "flags");
2656         if (rc < 0)
2657                 goto out;
2658
2659         rc = lfsck_bits_dump(&buf, &len, bk->lb_param, lfsck_param_names,
2660                              "param");
2661         if (rc < 0)
2662                 goto out;
2663
2664         rc = lfsck_time_dump(&buf, &len, lo->ll_time_last_complete,
2665                              "time_since_last_completed");
2666         if (rc < 0)
2667                 goto out;
2668
2669         rc = lfsck_time_dump(&buf, &len, lo->ll_time_latest_start,
2670                              "time_since_latest_start");
2671         if (rc < 0)
2672                 goto out;
2673
2674         rc = lfsck_time_dump(&buf, &len, lo->ll_time_last_checkpoint,
2675                              "time_since_last_checkpoint");
2676         if (rc < 0)
2677                 goto out;
2678
2679         rc = snprintf(buf, len,
2680                       "latest_start_position: "LPU64"\n"
2681                       "last_checkpoint_position: "LPU64"\n"
2682                       "first_failure_position: "LPU64"\n",
2683                       lo->ll_pos_latest_start,
2684                       lo->ll_pos_last_checkpoint,
2685                       lo->ll_pos_first_inconsistent);
2686         if (rc <= 0)
2687                 goto out;
2688
2689         buf += rc;
2690         len -= rc;
2691
2692         rc = snprintf(buf, len,
2693                       "success_count: %u\n"
2694                       "repaired_dangling: "LPU64"\n"
2695                       "repaired_unmatched_pair: "LPU64"\n"
2696                       "repaired_multiple_referenced: "LPU64"\n"
2697                       "repaired_orphan: "LPU64"\n"
2698                       "repaired_inconsistent_owner: "LPU64"\n"
2699                       "repaired_others: "LPU64"\n"
2700                       "skipped: "LPU64"\n"
2701                       "failed_phase1: "LPU64"\n"
2702                       "failed_phase2: "LPU64"\n",
2703                       lo->ll_success_count,
2704                       lo->ll_objs_repaired[LLIT_DANGLING - 1],
2705                       lo->ll_objs_repaired[LLIT_UNMATCHED_PAIR - 1],
2706                       lo->ll_objs_repaired[LLIT_MULTIPLE_REFERENCED - 1],
2707                       lo->ll_objs_repaired[LLIT_ORPHAN - 1],
2708                       lo->ll_objs_repaired[LLIT_INCONSISTENT_OWNER - 1],
2709                       lo->ll_objs_repaired[LLIT_OTHERS - 1],
2710                       lo->ll_objs_skipped,
2711                       lo->ll_objs_failed_phase1,
2712                       lo->ll_objs_failed_phase2);
2713         if (rc <= 0)
2714                 goto out;
2715
2716         buf += rc;
2717         len -= rc;
2718
2719         if (lo->ll_status == LS_SCANNING_PHASE1) {
2720                 __u64 pos;
2721                 const struct dt_it_ops *iops;
2722                 cfs_duration_t duration = cfs_time_current() -
2723                                           lfsck->li_time_last_checkpoint;
2724                 __u64 checked = lo->ll_objs_checked_phase1 + com->lc_new_checked;
2725                 __u64 speed = checked;
2726                 __u64 new_checked = com->lc_new_checked * HZ;
2727                 __u32 rtime = lo->ll_run_time_phase1 +
2728                               cfs_duration_sec(duration + HALF_SEC);
2729
2730                 if (duration != 0)
2731                         do_div(new_checked, duration);
2732                 if (rtime != 0)
2733                         do_div(speed, rtime);
2734                 rc = snprintf(buf, len,
2735                               "checked_phase1: "LPU64"\n"
2736                               "checked_phase2: "LPU64"\n"
2737                               "run_time_phase1: %u seconds\n"
2738                               "run_time_phase2: %u seconds\n"
2739                               "average_speed_phase1: "LPU64" items/sec\n"
2740                               "average_speed_phase2: N/A\n"
2741                               "real-time_speed_phase1: "LPU64" items/sec\n"
2742                               "real-time_speed_phase2: N/A\n",
2743                               checked,
2744                               lo->ll_objs_checked_phase2,
2745                               rtime,
2746                               lo->ll_run_time_phase2,
2747                               speed,
2748                               new_checked);
2749                 if (rc <= 0)
2750                         goto out;
2751
2752                 buf += rc;
2753                 len -= rc;
2754
2755                 LASSERT(lfsck->li_di_oit != NULL);
2756
2757                 iops = &lfsck->li_obj_oit->do_index_ops->dio_it;
2758
2759                 /* The low layer otable-based iteration position may NOT
2760                  * exactly match the layout-based directory traversal
2761                  * cookie. Generally, it is not a serious issue. But the
2762                  * caller should NOT make assumption on that. */
2763                 pos = iops->store(env, lfsck->li_di_oit);
2764                 if (!lfsck->li_current_oit_processed)
2765                         pos--;
2766                 rc = snprintf(buf, len, "current_position: "LPU64"\n", pos);
2767                 if (rc <= 0)
2768                         goto out;
2769
2770                 buf += rc;
2771                 len -= rc;
2772         } else {
2773                 /* XXX: LS_SCANNING_PHASE2 will be handled in the future. */
2774                 __u64 speed1 = lo->ll_objs_checked_phase1;
2775                 __u64 speed2 = lo->ll_objs_checked_phase2;
2776
2777                 if (lo->ll_run_time_phase1 != 0)
2778                         do_div(speed1, lo->ll_run_time_phase1);
2779                 if (lo->ll_run_time_phase2 != 0)
2780                         do_div(speed2, lo->ll_run_time_phase2);
2781                 rc = snprintf(buf, len,
2782                               "checked_phase1: "LPU64"\n"
2783                               "checked_phase2: "LPU64"\n"
2784                               "run_time_phase1: %u seconds\n"
2785                               "run_time_phase2: %u seconds\n"
2786                               "average_speed_phase1: "LPU64" items/sec\n"
2787                               "average_speed_phase2: "LPU64" objs/sec\n"
2788                               "real-time_speed_phase1: N/A\n"
2789                               "real-time_speed_phase2: N/A\n"
2790                               "current_position: N/A\n",
2791                               lo->ll_objs_checked_phase1,
2792                               lo->ll_objs_checked_phase2,
2793                               lo->ll_run_time_phase1,
2794                               lo->ll_run_time_phase2,
2795                               speed1,
2796                               speed2);
2797                 if (rc <= 0)
2798                         goto out;
2799
2800                 buf += rc;
2801                 len -= rc;
2802         }
2803         ret = save - len;
2804
2805 out:
2806         up_read(&com->lc_sem);
2807
2808         return ret;
2809 }
2810
2811 static int lfsck_layout_master_double_scan(const struct lu_env *env,
2812                                            struct lfsck_component *com)
2813 {
2814         struct lfsck_layout_master_data *llmd    = com->lc_data;
2815         struct ptlrpc_thread            *mthread = &com->lc_lfsck->li_thread;
2816         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
2817         struct lfsck_layout             *lo      = com->lc_file_ram;
2818         struct l_wait_info               lwi     = { 0 };
2819
2820         if (unlikely(lo->ll_status != LS_SCANNING_PHASE2))
2821                 return 0;
2822
2823         llmd->llmd_to_double_scan = 1;
2824         wake_up_all(&athread->t_ctl_waitq);
2825         l_wait_event(mthread->t_ctl_waitq,
2826                      llmd->llmd_in_double_scan ||
2827                      thread_is_stopped(athread),
2828                      &lwi);
2829         if (llmd->llmd_assistant_status < 0)
2830                 return llmd->llmd_assistant_status;
2831
2832         return 0;
2833 }
2834
2835 static int lfsck_layout_slave_double_scan(const struct lu_env *env,
2836                                           struct lfsck_component *com)
2837 {
2838         struct lfsck_instance           *lfsck  = com->lc_lfsck;
2839         struct lfsck_layout_slave_data  *llsd   = com->lc_data;
2840         struct lfsck_layout             *lo     = com->lc_file_ram;
2841         struct ptlrpc_thread            *thread = &lfsck->li_thread;
2842         int                              rc;
2843         ENTRY;
2844
2845         if (unlikely(lo->ll_status != LS_SCANNING_PHASE2))
2846                 RETURN(0);
2847
2848         atomic_inc(&lfsck->li_double_scan_count);
2849
2850         com->lc_new_checked = 0;
2851         com->lc_new_scanned = 0;
2852         com->lc_time_last_checkpoint = cfs_time_current();
2853         com->lc_time_next_checkpoint = com->lc_time_last_checkpoint +
2854                                 cfs_time_seconds(LFSCK_CHECKPOINT_INTERVAL);
2855
2856         while (1) {
2857                 struct l_wait_info lwi = LWI_TIMEOUT(cfs_time_seconds(30),
2858                                                      NULL, NULL);
2859
2860                 rc = lfsck_layout_slave_query_master(env, com);
2861                 if (list_empty(&llsd->llsd_master_list)) {
2862                         if (unlikely(!thread_is_running(thread)))
2863                                 rc = 0;
2864                         else
2865                                 rc = 1;
2866
2867                         GOTO(done, rc);
2868                 }
2869
2870                 if (rc < 0)
2871                         GOTO(done, rc);
2872
2873                 rc = l_wait_event(thread->t_ctl_waitq,
2874                                   !thread_is_running(thread) ||
2875                                   list_empty(&llsd->llsd_master_list),
2876                                   &lwi);
2877                 if (unlikely(!thread_is_running(thread)))
2878                         GOTO(done, rc = 0);
2879
2880                 if (rc == -ETIMEDOUT)
2881                         continue;
2882
2883                 GOTO(done, rc = (rc < 0 ? rc : 1));
2884         }
2885
2886 done:
2887         rc = lfsck_layout_double_scan_result(env, com, rc);
2888
2889         if (atomic_dec_and_test(&lfsck->li_double_scan_count))
2890                 wake_up_all(&lfsck->li_thread.t_ctl_waitq);
2891
2892         return rc;
2893 }
2894
2895 static void lfsck_layout_master_data_release(const struct lu_env *env,
2896                                              struct lfsck_component *com)
2897 {
2898         struct lfsck_layout_master_data *llmd   = com->lc_data;
2899         struct lfsck_instance           *lfsck  = com->lc_lfsck;
2900         struct lfsck_tgt_descs          *ltds;
2901         struct lfsck_tgt_desc           *ltd;
2902         struct lfsck_tgt_desc           *next;
2903
2904         LASSERT(llmd != NULL);
2905         LASSERT(thread_is_init(&llmd->llmd_thread) ||
2906                 thread_is_stopped(&llmd->llmd_thread));
2907         LASSERT(list_empty(&llmd->llmd_req_list));
2908
2909         com->lc_data = NULL;
2910
2911         ltds = &lfsck->li_ost_descs;
2912         spin_lock(&ltds->ltd_lock);
2913         list_for_each_entry_safe(ltd, next, &llmd->llmd_ost_phase1_list,
2914                                  ltd_layout_phase_list) {
2915                 list_del_init(&ltd->ltd_layout_phase_list);
2916         }
2917         list_for_each_entry_safe(ltd, next, &llmd->llmd_ost_phase2_list,
2918                                  ltd_layout_phase_list) {
2919                 list_del_init(&ltd->ltd_layout_phase_list);
2920         }
2921         list_for_each_entry_safe(ltd, next, &llmd->llmd_ost_list,
2922                                  ltd_layout_list) {
2923                 list_del_init(&ltd->ltd_layout_list);
2924         }
2925         list_for_each_entry_safe(ltd, next, &llmd->llmd_mdt_phase1_list,
2926                                  ltd_layout_phase_list) {
2927                 list_del_init(&ltd->ltd_layout_phase_list);
2928         }
2929         list_for_each_entry_safe(ltd, next, &llmd->llmd_mdt_phase2_list,
2930                                  ltd_layout_phase_list) {
2931                 list_del_init(&ltd->ltd_layout_phase_list);
2932         }
2933         list_for_each_entry_safe(ltd, next, &llmd->llmd_mdt_list,
2934                                  ltd_layout_list) {
2935                 list_del_init(&ltd->ltd_layout_list);
2936         }
2937         spin_unlock(&ltds->ltd_lock);
2938
2939         OBD_FREE_PTR(llmd);
2940 }
2941
2942 static void lfsck_layout_slave_data_release(const struct lu_env *env,
2943                                             struct lfsck_component *com)
2944 {
2945         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
2946         struct lfsck_layout_seq          *lls;
2947         struct lfsck_layout_seq          *next;
2948         struct lfsck_layout_slave_target *llst;
2949         struct lfsck_layout_slave_target *tmp;
2950
2951         LASSERT(llsd != NULL);
2952
2953         com->lc_data = NULL;
2954
2955         list_for_each_entry_safe(lls, next, &llsd->llsd_seq_list,
2956                                      lls_list) {
2957                 list_del_init(&lls->lls_list);
2958                 lfsck_object_put(env, lls->lls_lastid_obj);
2959                 OBD_FREE_PTR(lls);
2960         }
2961
2962         list_for_each_entry_safe(llst, tmp, &llsd->llsd_master_list,
2963                                  llst_list) {
2964                 list_del_init(&llst->llst_list);
2965                 OBD_FREE_PTR(llst);
2966         }
2967
2968         OBD_FREE_PTR(llsd);
2969 }
2970
2971 static void lfsck_layout_master_quit(const struct lu_env *env,
2972                                      struct lfsck_component *com)
2973 {
2974         struct lfsck_layout_master_data *llmd    = com->lc_data;
2975         struct ptlrpc_thread            *mthread = &com->lc_lfsck->li_thread;
2976         struct ptlrpc_thread            *athread = &llmd->llmd_thread;
2977         struct l_wait_info               lwi     = { 0 };
2978
2979         llmd->llmd_exit = 1;
2980         wake_up_all(&athread->t_ctl_waitq);
2981         l_wait_event(mthread->t_ctl_waitq,
2982                      thread_is_init(athread) ||
2983                      thread_is_stopped(athread),
2984                      &lwi);
2985 }
2986
2987 static int lfsck_layout_master_in_notify(const struct lu_env *env,
2988                                          struct lfsck_component *com,
2989                                          struct lfsck_request *lr)
2990 {
2991         struct lfsck_instance           *lfsck = com->lc_lfsck;
2992         struct lfsck_layout             *lo    = com->lc_file_ram;
2993         struct lfsck_layout_master_data *llmd  = com->lc_data;
2994         struct lfsck_tgt_descs          *ltds;
2995         struct lfsck_tgt_desc           *ltd;
2996         ENTRY;
2997
2998         if (lr->lr_event != LE_PHASE1_DONE &&
2999             lr->lr_event != LE_PHASE2_DONE &&
3000             lr->lr_event != LE_STOP)
3001                 RETURN(-EINVAL);
3002
3003         if (lr->lr_flags & LEF_FROM_OST)
3004                 ltds = &lfsck->li_ost_descs;
3005         else
3006                 ltds = &lfsck->li_mdt_descs;
3007         spin_lock(&ltds->ltd_lock);
3008         ltd = LTD_TGT(ltds, lr->lr_index);
3009         if (ltd == NULL) {
3010                 spin_unlock(&ltds->ltd_lock);
3011
3012                 RETURN(-ENODEV);
3013         }
3014
3015         list_del_init(&ltd->ltd_layout_phase_list);
3016         switch (lr->lr_event) {
3017         case LE_PHASE1_DONE:
3018                 if (lr->lr_status <= 0) {
3019                         ltd->ltd_layout_done = 1;
3020                         list_del_init(&ltd->ltd_layout_list);
3021                         lo->ll_flags |= LF_INCOMPLETE;
3022                         break;
3023                 }
3024
3025                 if (lr->lr_flags & LEF_FROM_OST) {
3026                         if (list_empty(&ltd->ltd_layout_list))
3027                                 list_add_tail(&ltd->ltd_layout_list,
3028                                               &llmd->llmd_ost_list);
3029                         list_add_tail(&ltd->ltd_layout_phase_list,
3030                                       &llmd->llmd_ost_phase2_list);
3031                 } else {
3032                         if (list_empty(&ltd->ltd_layout_list))
3033                                 list_add_tail(&ltd->ltd_layout_list,
3034                                               &llmd->llmd_mdt_list);
3035                         list_add_tail(&ltd->ltd_layout_phase_list,
3036                                       &llmd->llmd_mdt_phase2_list);
3037                 }
3038                 break;
3039         case LE_PHASE2_DONE:
3040                 ltd->ltd_layout_done = 1;
3041                 list_del_init(&ltd->ltd_layout_list);
3042                 break;
3043         case LE_STOP:
3044                 ltd->ltd_layout_done = 1;
3045                 list_del_init(&ltd->ltd_layout_list);
3046                 if (!(lr->lr_flags & LEF_FORCE_STOP))
3047                         lo->ll_flags |= LF_INCOMPLETE;
3048                 break;
3049         default:
3050                 break;
3051         }
3052         spin_unlock(&ltds->ltd_lock);
3053
3054         if (lr->lr_flags & LEF_FORCE_STOP) {
3055                 struct lfsck_stop *stop = &lfsck_env_info(env)->lti_stop;
3056
3057                 memset(stop, 0, sizeof(*stop));
3058                 stop->ls_status = lr->lr_status;
3059                 stop->ls_flags = lr->lr_param;
3060                 lfsck_stop(env, lfsck->li_bottom, stop);
3061         } else if (lfsck_layout_master_to_orphan(llmd)) {
3062                 wake_up_all(&llmd->llmd_thread.t_ctl_waitq);
3063         }
3064
3065         RETURN(0);
3066 }
3067
3068 static int lfsck_layout_slave_in_notify(const struct lu_env *env,
3069                                         struct lfsck_component *com,
3070                                         struct lfsck_request *lr)
3071 {
3072         struct lfsck_instance            *lfsck = com->lc_lfsck;
3073         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
3074         struct lfsck_layout_slave_target *llst;
3075         ENTRY;
3076
3077         if (lr->lr_event != LE_PHASE2_DONE &&
3078             lr->lr_event != LE_STOP)
3079                 RETURN(-EINVAL);
3080
3081         llst = lfsck_layout_llst_find_and_del(llsd, lr->lr_index);
3082         if (llst == NULL)
3083                 RETURN(-ENODEV);
3084
3085         lfsck_layout_llst_put(llst);
3086         if (list_empty(&llsd->llsd_master_list)) {
3087                 switch (lr->lr_event) {
3088                 case LE_PHASE2_DONE:
3089                         wake_up_all(&lfsck->li_thread.t_ctl_waitq);
3090                         break;
3091                 case LE_STOP: {
3092                         struct lfsck_stop *stop = &lfsck_env_info(env)->lti_stop;
3093
3094                         memset(stop, 0, sizeof(*stop));
3095                         stop->ls_status = lr->lr_status;
3096                         stop->ls_flags = lr->lr_param;
3097                         lfsck_stop(env, lfsck->li_bottom, stop);
3098                         break;
3099                 }
3100                 default:
3101                         break;
3102                 }
3103         }
3104
3105         RETURN(0);
3106 }
3107
3108 static int lfsck_layout_query(const struct lu_env *env,
3109                               struct lfsck_component *com)
3110 {
3111         struct lfsck_layout *lo = com->lc_file_ram;
3112
3113         return lo->ll_status;
3114 }
3115
3116 static int lfsck_layout_master_stop_notify(const struct lu_env *env,
3117                                            struct lfsck_component *com,
3118                                            struct lfsck_tgt_descs *ltds,
3119                                            struct lfsck_tgt_desc *ltd,
3120                                            struct ptlrpc_request_set *set)
3121 {
3122         struct lfsck_thread_info          *info  = lfsck_env_info(env);
3123         struct lfsck_async_interpret_args *laia  = &info->lti_laia;
3124         struct lfsck_request              *lr    = &info->lti_lr;
3125         struct lfsck_instance             *lfsck = com->lc_lfsck;
3126         int                                rc;
3127
3128         LASSERT(list_empty(&ltd->ltd_layout_list));
3129         LASSERT(list_empty(&ltd->ltd_layout_phase_list));
3130
3131         memset(lr, 0, sizeof(*lr));
3132         lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
3133         lr->lr_event = LE_STOP;
3134         lr->lr_active = LT_LAYOUT;
3135         if (ltds == &lfsck->li_ost_descs) {
3136                 lr->lr_flags = LEF_TO_OST;
3137         } else {
3138                 if (ltd->ltd_index == lfsck_dev_idx(lfsck->li_bottom))
3139                         return 0;
3140
3141                 lr->lr_flags = 0;
3142         }
3143         lr->lr_status = LS_CO_STOPPED;
3144
3145         laia->laia_com = com;
3146         laia->laia_ltds = ltds;
3147         laia->laia_ltd = ltd;
3148         laia->laia_lr = lr;
3149
3150         rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
3151                                  lfsck_layout_master_async_interpret,
3152                                  laia, LFSCK_NOTIFY);
3153         if (rc != 0)
3154                 CERROR("%s: Fail to notify %s %x for co-stop: rc = %d\n",
3155                        lfsck_lfsck2name(lfsck),
3156                        (lr->lr_flags & LEF_TO_OST) ? "OST" : "MDT",
3157                        ltd->ltd_index, rc);
3158
3159         return rc;
3160 }
3161
3162 /* with lfsck::li_lock held */
3163 static int lfsck_layout_slave_join(const struct lu_env *env,
3164                                    struct lfsck_component *com,
3165                                    struct lfsck_start_param *lsp)
3166 {
3167         struct lfsck_instance            *lfsck = com->lc_lfsck;
3168         struct lfsck_layout_slave_data   *llsd  = com->lc_data;
3169         struct lfsck_layout_slave_target *llst;
3170         struct lfsck_start               *start = lsp->lsp_start;
3171         int                               rc    = 0;
3172         ENTRY;
3173
3174         if (!lsp->lsp_index_valid || start == NULL ||
3175             !(start->ls_flags & LPF_ALL_MDT))
3176                 RETURN(-EALREADY);
3177
3178         spin_unlock(&lfsck->li_lock);
3179         rc = lfsck_layout_llst_add(llsd, lsp->lsp_index);
3180         spin_lock(&lfsck->li_lock);
3181         if (rc == 0 && !thread_is_running(&lfsck->li_thread)) {
3182                 spin_unlock(&lfsck->li_lock);
3183                 llst = lfsck_layout_llst_find_and_del(llsd, lsp->lsp_index);
3184                 if (llst != NULL)
3185                         lfsck_layout_llst_put(llst);
3186                 spin_lock(&lfsck->li_lock);
3187                 rc = -EAGAIN;
3188         }
3189
3190         RETURN(rc);
3191 }
3192
3193 static struct lfsck_operations lfsck_layout_master_ops = {
3194         .lfsck_reset            = lfsck_layout_reset,
3195         .lfsck_fail             = lfsck_layout_fail,
3196         .lfsck_checkpoint       = lfsck_layout_master_checkpoint,
3197         .lfsck_prep             = lfsck_layout_master_prep,
3198         .lfsck_exec_oit         = lfsck_layout_master_exec_oit,
3199         .lfsck_exec_dir         = lfsck_layout_exec_dir,
3200         .lfsck_post             = lfsck_layout_master_post,
3201         .lfsck_dump             = lfsck_layout_dump,
3202         .lfsck_double_scan      = lfsck_layout_master_double_scan,
3203         .lfsck_data_release     = lfsck_layout_master_data_release,
3204         .lfsck_quit             = lfsck_layout_master_quit,
3205         .lfsck_in_notify        = lfsck_layout_master_in_notify,
3206         .lfsck_query            = lfsck_layout_query,
3207         .lfsck_stop_notify      = lfsck_layout_master_stop_notify,
3208 };
3209
3210 static struct lfsck_operations lfsck_layout_slave_ops = {
3211         .lfsck_reset            = lfsck_layout_reset,
3212         .lfsck_fail             = lfsck_layout_fail,
3213         .lfsck_checkpoint       = lfsck_layout_slave_checkpoint,
3214         .lfsck_prep             = lfsck_layout_slave_prep,
3215         .lfsck_exec_oit         = lfsck_layout_slave_exec_oit,
3216         .lfsck_exec_dir         = lfsck_layout_exec_dir,
3217         .lfsck_post             = lfsck_layout_slave_post,
3218         .lfsck_dump             = lfsck_layout_dump,
3219         .lfsck_double_scan      = lfsck_layout_slave_double_scan,
3220         .lfsck_data_release     = lfsck_layout_slave_data_release,
3221         .lfsck_in_notify        = lfsck_layout_slave_in_notify,
3222         .lfsck_query            = lfsck_layout_query,
3223         .lfsck_join             = lfsck_layout_slave_join,
3224 };
3225
3226 int lfsck_layout_setup(const struct lu_env *env, struct lfsck_instance *lfsck)
3227 {
3228         struct lfsck_component  *com;
3229         struct lfsck_layout     *lo;
3230         struct dt_object        *root = NULL;
3231         struct dt_object        *obj;
3232         int                      rc;
3233         ENTRY;
3234
3235         OBD_ALLOC_PTR(com);
3236         if (com == NULL)
3237                 RETURN(-ENOMEM);
3238
3239         INIT_LIST_HEAD(&com->lc_link);
3240         INIT_LIST_HEAD(&com->lc_link_dir);
3241         init_rwsem(&com->lc_sem);
3242         atomic_set(&com->lc_ref, 1);
3243         com->lc_lfsck = lfsck;
3244         com->lc_type = LT_LAYOUT;
3245         if (lfsck->li_master) {
3246                 struct lfsck_layout_master_data *llmd;
3247
3248                 com->lc_ops = &lfsck_layout_master_ops;
3249                 OBD_ALLOC_PTR(llmd);
3250                 if (llmd == NULL)
3251                         GOTO(out, rc = -ENOMEM);
3252
3253                 INIT_LIST_HEAD(&llmd->llmd_req_list);
3254                 spin_lock_init(&llmd->llmd_lock);
3255                 INIT_LIST_HEAD(&llmd->llmd_ost_list);
3256                 INIT_LIST_HEAD(&llmd->llmd_ost_phase1_list);
3257                 INIT_LIST_HEAD(&llmd->llmd_ost_phase2_list);
3258                 INIT_LIST_HEAD(&llmd->llmd_mdt_list);
3259                 INIT_LIST_HEAD(&llmd->llmd_mdt_phase1_list);
3260                 INIT_LIST_HEAD(&llmd->llmd_mdt_phase2_list);
3261                 init_waitqueue_head(&llmd->llmd_thread.t_ctl_waitq);
3262                 com->lc_data = llmd;
3263         } else {
3264                 struct lfsck_layout_slave_data *llsd;
3265
3266                 com->lc_ops = &lfsck_layout_slave_ops;
3267                 OBD_ALLOC_PTR(llsd);
3268                 if (llsd == NULL)
3269                         GOTO(out, rc = -ENOMEM);
3270
3271                 INIT_LIST_HEAD(&llsd->llsd_seq_list);
3272                 INIT_LIST_HEAD(&llsd->llsd_master_list);
3273                 spin_lock_init(&llsd->llsd_lock);
3274                 com->lc_data = llsd;
3275         }
3276         com->lc_file_size = sizeof(*lo);
3277         OBD_ALLOC(com->lc_file_ram, com->lc_file_size);
3278         if (com->lc_file_ram == NULL)
3279                 GOTO(out, rc = -ENOMEM);
3280
3281         OBD_ALLOC(com->lc_file_disk, com->lc_file_size);
3282         if (com->lc_file_disk == NULL)
3283                 GOTO(out, rc = -ENOMEM);
3284
3285         root = dt_locate(env, lfsck->li_bottom, &lfsck->li_local_root_fid);
3286         if (IS_ERR(root))
3287                 GOTO(out, rc = PTR_ERR(root));
3288
3289         if (unlikely(!dt_try_as_dir(env, root)))
3290                 GOTO(out, rc = -ENOTDIR);
3291
3292         obj = local_file_find_or_create(env, lfsck->li_los, root,
3293                                         lfsck_layout_name,
3294                                         S_IFREG | S_IRUGO | S_IWUSR);
3295         if (IS_ERR(obj))
3296                 GOTO(out, rc = PTR_ERR(obj));
3297
3298         com->lc_obj = obj;
3299         rc = lfsck_layout_load(env, com);
3300         if (rc > 0)
3301                 rc = lfsck_layout_reset(env, com, true);
3302         else if (rc == -ENOENT)
3303                 rc = lfsck_layout_init(env, com);
3304
3305         if (rc != 0)
3306                 GOTO(out, rc);
3307
3308         lo = com->lc_file_ram;
3309         switch (lo->ll_status) {
3310         case LS_INIT:
3311         case LS_COMPLETED:
3312         case LS_FAILED:
3313         case LS_STOPPED:
3314         case LS_PARTIAL:
3315                 spin_lock(&lfsck->li_lock);
3316                 list_add_tail(&com->lc_link, &lfsck->li_list_idle);
3317                 spin_unlock(&lfsck->li_lock);
3318                 break;
3319         default:
3320                 CERROR("%s: unknown lfsck_layout status: rc = %u\n",
3321                        lfsck_lfsck2name(lfsck), lo->ll_status);
3322                 /* fall through */
3323         case LS_SCANNING_PHASE1:
3324         case LS_SCANNING_PHASE2:
3325                 /* No need to store the status to disk right now.
3326                  * If the system crashed before the status stored,
3327                  * it will be loaded back when next time. */
3328                 lo->ll_status = LS_CRASHED;
3329                 lo->ll_flags |= LF_INCOMPLETE;
3330                 /* fall through */
3331         case LS_PAUSED:
3332         case LS_CRASHED:
3333         case LS_CO_FAILED:
3334         case LS_CO_STOPPED:
3335         case LS_CO_PAUSED:
3336                 spin_lock(&lfsck->li_lock);
3337                 list_add_tail(&com->lc_link, &lfsck->li_list_scan);
3338                 spin_unlock(&lfsck->li_lock);
3339                 break;
3340         }
3341
3342         if (lo->ll_flags & LF_CRASHED_LASTID) {
3343                 LASSERT(lfsck->li_out_notify != NULL);
3344
3345                 lfsck->li_out_notify(env, lfsck->li_out_notify_data,
3346                                      LE_LASTID_REBUILDING);
3347         }
3348
3349         GOTO(out, rc = 0);
3350
3351 out:
3352         if (root != NULL && !IS_ERR(root))
3353                 lu_object_put(env, &root->do_lu);
3354
3355         if (rc != 0)
3356                 lfsck_component_cleanup(env, com);
3357
3358         return rc;
3359 }