lustre/target/update_recovery.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, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2014, Intel Corporation.
  24  */
  25
  26 /*
  27  * lustre/target/update_recovery.c
  28  *
  29  * This file implement the methods to handle the update recovery.
  30  *
  31  * During DNE recovery, the recovery thread will redo the operation according
  32  * to the transaction no, and these replay are either from client replay req
  33  * or update replay records(for distribute transaction) in the update log.
  34  * For distribute transaction replay, the replay thread will call
  35  * distribute_txn_replay_handle() to handle the updates.
  36  *
  37  * After the Master MDT restarts, it will retrieve the update records from all
  38  * of MDTs, for each distributed operation, it will check updates on all MDTs,
  39  * if some updates records are missing on some MDTs, the replay thread will redo
  40  * updates on these MDTs.
  41  *
  42  * Author: Di Wang <di.wang@intel.com>
  43  */
  44 #define DEBUG_SUBSYSTEM S_CLASS
  45
  46 #include <lu_target.h>
  47 #include <md_object.h>
  48 #include <lustre_update.h>
  49 #include <obd.h>
  50 #include <obd_class.h>
  51 #include "tgt_internal.h"
  52
  53 /**
  54  * Lookup distribute_txn_replay req
  55  *
  56  * Lookup distribute_txn_replay in the replay list by batchid.
  57  * It is assumed the list has been locked before calling this function.
  58  *
  59  * \param[in] tdtd      distribute_txn_data, which holds the replay
  60  *                      list.
  61  * \param[in] batchid   batchid used by lookup.
  62  *
  63  * \retval              pointer of the replay if succeeds.
  64  * \retval              NULL if can not find it.
  65  */
  66 static struct distribute_txn_replay_req *
  67 dtrq_lookup(struct target_distribute_txn_data *tdtd, __u64 batchid)
  68 {
  69         struct distribute_txn_replay_req        *tmp;
  70         struct distribute_txn_replay_req        *dtrq = NULL;
  71
  72         list_for_each_entry(tmp, &tdtd->tdtd_replay_list, dtrq_list) {
  73                 if (tmp->dtrq_batchid == batchid) {
  74                         dtrq = tmp;
  75                         break;
  76                 }
  77         }
  78         return dtrq;
  79 }
  80
  81 /**
  82  * insert distribute txn replay req
  83  *
  84  * Insert distribute txn replay to the replay list, and it assumes the
  85  * list has been looked. Note: the replay list is a sorted list, which
  86  * is sorted by master transno. It is assumed the replay list has been
  87  * locked before calling this function.
  88  *
  89  * \param[in] tdtd      target distribute txn data where replay list is
  90  * \param[in] new       distribute txn replay to be inserted
  91  *
  92  * \retval              0 if insertion succeeds
  93  * \retval              EEXIST if the dtrq already exists
  94  */
  95 static int dtrq_insert(struct target_distribute_txn_data *tdtd,
  96                         struct distribute_txn_replay_req *new)
  97 {
  98         struct distribute_txn_replay_req *iter;
  99
 100         /* Check if the dtrq has been added to the list */
 101         iter = dtrq_lookup(tdtd, new->dtrq_batchid);
 102         if (iter != NULL)
 103                 return -EEXIST;
 104
 105         list_for_each_entry_reverse(iter, &tdtd->tdtd_replay_list, dtrq_list) {
 106                 if (iter->dtrq_master_transno > new->dtrq_master_transno)
 107                         continue;
 108
 109                 /* If there are mulitple replay req with same transno, then
 110                  * sort them with batchid */
 111                 if (iter->dtrq_master_transno == new->dtrq_master_transno &&
 112                     iter->dtrq_batchid > new->dtrq_batchid)
 113                         continue;
 114
 115                 list_add(&new->dtrq_list, &iter->dtrq_list);
 116                 break;
 117         }
 118
 119         if (list_empty(&new->dtrq_list))
 120                 list_add(&new->dtrq_list, &tdtd->tdtd_replay_list);
 121
 122         return 0;
 123 }
 124
 125 /**
 126  * create distribute txn replay req
 127  *
 128  * Allocate distribute txn replay req according to the update records.
 129  *
 130  * \param[in] tdtd      target distribute txn data where replay list is.
 131  * \param[in] record    update records from the update log.
 132  *
 133  * \retval              the pointer of distribute txn replay req if
 134  *                      the creation succeeds.
 135  * \retval              NULL if the creation fails.
 136  */
 137 static struct distribute_txn_replay_req *
 138 dtrq_create(struct target_distribute_txn_data *tdtd,
 139             struct llog_update_record *lur)
 140 {
 141         struct distribute_txn_replay_req *new;
 142
 143         OBD_ALLOC_PTR(new);
 144         if (new == NULL)
 145                 RETURN(ERR_PTR(-ENOMEM));
 146
 147         new->dtrq_lur_size = llog_update_record_size(lur);
 148         OBD_ALLOC_LARGE(new->dtrq_lur, new->dtrq_lur_size);
 149         if (new->dtrq_lur == NULL) {
 150                 OBD_FREE_PTR(new);
 151                 RETURN(ERR_PTR(-ENOMEM));
 152         }
 153
 154         memcpy(new->dtrq_lur, lur, new->dtrq_lur_size);
 155
 156         /* If the transno in the update record is 0, it means the
 157          * update are from master MDT, and it will use the master
 158          * last committed transno as its master transno. Later, if
 159          * the update records are gotten from slave MDTs, then these
 160          * transno will be replaced.
 161          * See insert_update_records_to_replay_list(). */
 162         if (lur->lur_update_rec.ur_master_transno == 0) {
 163                 new->dtrq_lur->lur_update_rec.ur_master_transno =
 164                                 tdtd->tdtd_lut->lut_obd->obd_last_committed;
 165                 new->dtrq_master_transno =
 166                                 tdtd->tdtd_lut->lut_obd->obd_last_committed;
 167         } else {
 168                 new->dtrq_master_transno =
 169                                 lur->lur_update_rec.ur_master_transno;
 170         }
 171
 172         new->dtrq_batchid = lur->lur_update_rec.ur_batchid;
 173
 174         spin_lock_init(&new->dtrq_sub_list_lock);
 175         INIT_LIST_HEAD(&new->dtrq_sub_list);
 176         INIT_LIST_HEAD(&new->dtrq_list);
 177
 178         RETURN(new);
 179 }
 180
 181 /**
 182  * Lookup distribute sub replay
 183  *
 184  * Lookup distribute sub replay in the sub list of distribute_txn_replay by
 185  * mdt_index.
 186  *
 187  * \param[in] distribute_txn_replay_req the distribute txn replay req to lookup
 188  * \param[in] mdt_index                 the mdt_index as the key of lookup
 189  *
 190  * \retval              the pointer of sub replay if it can be found.
 191  * \retval              NULL if it can not find.
 192  */
 193 struct distribute_txn_replay_req_sub *
 194 dtrq_sub_lookup(struct distribute_txn_replay_req *dtrq, __u32 mdt_index)
 195 {
 196         struct distribute_txn_replay_req_sub *dtrqs = NULL;
 197         struct distribute_txn_replay_req_sub *tmp;
 198
 199         list_for_each_entry(tmp, &dtrq->dtrq_sub_list, dtrqs_list) {
 200                 if (tmp->dtrqs_mdt_index == mdt_index) {
 201                         dtrqs = tmp;
 202                         break;
 203                 }
 204         }
 205         return dtrqs;
 206 }
 207
 208 /**
 209  * Try to add cookie to sub distribute txn request
 210  *
 211  * Check if the update log cookie has been added to the request, if not,
 212  * add it to the dtrqs_cookie_list.
 213  *
 214  * \param[in] dtrqs     sub replay req where cookies to be added.
 215  * \param[in] cookie    cookie to be added.
 216  *
 217  * \retval              0 if the cookie is adding succeeds.
 218  * \retval              negative errno if adding fails.
 219  */
 220 static int dtrq_sub_add_cookie(struct distribute_txn_replay_req_sub *dtrqs,
 221                                struct llog_cookie *cookie)
 222 {
 223         struct sub_thandle_cookie *new;
 224
 225         OBD_ALLOC_PTR(new);
 226         if (new == NULL)
 227                 return -ENOMEM;
 228
 229         INIT_LIST_HEAD(&new->stc_list);
 230         new->stc_cookie = *cookie;
 231         /* Note: only single thread will access one sub_request each time,
 232          * so no need lock here */
 233         list_add(&new->stc_list, &dtrqs->dtrqs_cookie_list);
 234
 235         return 0;
 236 }
 237
 238 /**
 239  * Insert distribute txn sub req replay
 240  *
 241  * Allocate sub replay req and insert distribute txn replay list.
 242  *
 243  * \param[in] dtrq      d to be added
 244  * \param[in] cookie    the cookie of the update record
 245  * \param[in] mdt_index the mdt_index of the update record
 246  *
 247  * \retval              0 if the adding succeeds.
 248  * \retval              negative errno if the adding fails.
 249  */
 250 static int
 251 dtrq_sub_create_and_insert(struct distribute_txn_replay_req *dtrq,
 252                            struct llog_cookie *cookie,
 253                            __u32 mdt_index)
 254 {
 255         struct distribute_txn_replay_req_sub    *dtrqs = NULL;
 256         struct distribute_txn_replay_req_sub    *new;
 257         int                                     rc;
 258         ENTRY;
 259
 260         spin_lock(&dtrq->dtrq_sub_list_lock);
 261         dtrqs = dtrq_sub_lookup(dtrq, mdt_index);
 262         spin_unlock(&dtrq->dtrq_sub_list_lock);
 263         if (dtrqs != NULL) {
 264                 rc = dtrq_sub_add_cookie(dtrqs, cookie);
 265                 RETURN(0);
 266         }
 267
 268         OBD_ALLOC_PTR(new);
 269         if (new == NULL)
 270                 RETURN(-ENOMEM);
 271
 272         INIT_LIST_HEAD(&new->dtrqs_list);
 273         INIT_LIST_HEAD(&new->dtrqs_cookie_list);
 274         new->dtrqs_mdt_index = mdt_index;
 275         spin_lock(&dtrq->dtrq_sub_list_lock);
 276         dtrqs = dtrq_sub_lookup(dtrq, mdt_index);
 277         if (dtrqs == NULL) {
 278                 list_add(&new->dtrqs_list, &dtrq->dtrq_sub_list);
 279                 dtrqs = new;
 280         } else {
 281                 OBD_FREE_PTR(new);
 282         }
 283         spin_unlock(&dtrq->dtrq_sub_list_lock);
 284
 285         rc = dtrq_sub_add_cookie(dtrqs, cookie);
 286
 287         RETURN(rc);
 288 }
 289
 290 /**
 291  * append updates to the current replay updates
 292  *
 293  * Append more updates to the existent replay update. And this is only
 294  * used when combining mulitple updates into one large updates during
 295  * replay.
 296  *
 297  * \param[in] dtrq      the update replay request where the new update
 298  *                      records will be added.
 299  * \param[in] lur       the new update record.
 300  *
 301  * \retval              0 if appending succeeds.
 302  * \retval              negative errno if appending fails.
 303  */
 304 static int dtrq_append_updates(struct distribute_txn_replay_req *dtrq,
 305                                struct update_records *record)
 306 {
 307         struct llog_update_record *new_lur;
 308         size_t lur_size = dtrq->dtrq_lur_size;
 309         void *ptr;
 310         ENTRY;
 311
 312         /* Because several threads might retrieve the same records from
 313          * different targets, and we only need one copy of records. So
 314          * we will check if the records is in the next one, if not, just
 315          * skip it */
 316         spin_lock(&dtrq->dtrq_sub_list_lock);
 317         if (dtrq->dtrq_lur->lur_update_rec.ur_index + 1 != record->ur_index) {
 318                 spin_unlock(&dtrq->dtrq_sub_list_lock);
 319                 RETURN(0);
 320         }
 321         dtrq->dtrq_lur->lur_update_rec.ur_index++;
 322         spin_unlock(&dtrq->dtrq_sub_list_lock);
 323
 324         lur_size += update_records_size(record);
 325         OBD_ALLOC_LARGE(new_lur, lur_size);
 326         if (new_lur == NULL) {
 327                 spin_lock(&dtrq->dtrq_sub_list_lock);
 328                 dtrq->dtrq_lur->lur_update_rec.ur_index--;
 329                 spin_unlock(&dtrq->dtrq_sub_list_lock);
 330                 RETURN(-ENOMEM);
 331         }
 332
 333         /* Copy the old and new records to the new allocated buffer */
 334         memcpy(new_lur, dtrq->dtrq_lur, dtrq->dtrq_lur_size);
 335         ptr = (char *)&new_lur->lur_update_rec +
 336                 update_records_size(&new_lur->lur_update_rec);
 337         memcpy(ptr, &record->ur_ops,
 338                update_records_size(record) -
 339                offsetof(struct update_records, ur_ops));
 340
 341         new_lur->lur_update_rec.ur_update_count += record->ur_update_count;
 342         new_lur->lur_update_rec.ur_param_count += record->ur_param_count;
 343         new_lur->lur_hdr.lrh_len = llog_update_record_size(new_lur);
 344
 345         /* Replace the records */
 346         OBD_FREE_LARGE(dtrq->dtrq_lur, dtrq->dtrq_lur_size);
 347         dtrq->dtrq_lur = new_lur;
 348         dtrq->dtrq_lur_size = lur_size;
 349         dtrq->dtrq_lur->lur_update_rec.ur_flags = record->ur_flags;
 350         update_records_dump(&new_lur->lur_update_rec, D_INFO, true);
 351         RETURN(0);
 352 }
 353
 354 /**
 355  * Insert update records to the replay list.
 356  *
 357  * Allocate distribute txn replay req and insert it into the replay
 358  * list, then insert the update records into the replay req.
 359  *
 360  * \param[in] tdtd      distribute txn replay data where the replay list
 361  *                      is.
 362  * \param[in] record    the update record
 363  * \param[in] cookie    cookie of the record
 364  * \param[in] index     mdt index of the record
 365  *
 366  * \retval              0 if the adding succeeds.
 367  * \retval              negative errno if the adding fails.
 368  */
 369 int
 370 insert_update_records_to_replay_list(struct target_distribute_txn_data *tdtd,
 371                                      struct llog_update_record *lur,
 372                                      struct llog_cookie *cookie,
 373                                      __u32 mdt_index)
 374 {
 375         struct distribute_txn_replay_req *dtrq;
 376         struct update_records *record = &lur->lur_update_rec;
 377         bool replace_record = false;
 378         int rc = 0;
 379         ENTRY;
 380
 381         CDEBUG(D_HA, "%s: insert record batchid = "LPU64" transno = "LPU64
 382                " mdt_index %u\n", tdtd->tdtd_lut->lut_obd->obd_name,
 383                record->ur_batchid, record->ur_master_transno, mdt_index);
 384
 385         /* Update batchid if necessary */
 386         spin_lock(&tdtd->tdtd_batchid_lock);
 387         if (record->ur_batchid >= tdtd->tdtd_batchid) {
 388                 CDEBUG(D_HA, "%s update batchid from "LPU64 " to "LPU64"\n",
 389                        tdtd->tdtd_lut->lut_obd->obd_name,
 390                        tdtd->tdtd_batchid, record->ur_batchid);
 391                 tdtd->tdtd_batchid = record->ur_batchid + 1;
 392         }
 393         spin_unlock(&tdtd->tdtd_batchid_lock);
 394
 395 again:
 396         spin_lock(&tdtd->tdtd_replay_list_lock);
 397         /* First try to build the replay update request with the records */
 398         dtrq = dtrq_lookup(tdtd, record->ur_batchid);
 399         if (dtrq == NULL) {
 400                 spin_unlock(&tdtd->tdtd_replay_list_lock);
 401                 dtrq = dtrq_create(tdtd, lur);
 402                 if (IS_ERR(dtrq))
 403                         RETURN(PTR_ERR(dtrq));
 404
 405                 spin_lock(&tdtd->tdtd_replay_list_lock);
 406                 rc = dtrq_insert(tdtd, dtrq);
 407                 if (rc < 0) {
 408                         spin_unlock(&tdtd->tdtd_replay_list_lock);
 409                         dtrq_destroy(dtrq);
 410                         if (rc == -EEXIST)
 411                                 goto again;
 412                         return rc;
 413                 }
 414         } else {
 415                 /* If the master transno in update header is not
 416                 * matched with the one in the record, then it means
 417                 * the dtrq is originally created by master record,
 418                 * so we need update master transno and reposition
 419                 * the dtrq(by master transno) in the list and also
 420                 * replace update record */
 421                 if (record->ur_master_transno != 0 &&
 422                     dtrq->dtrq_master_transno != record->ur_master_transno &&
 423                     dtrq->dtrq_lur != NULL) {
 424                         list_del_init(&dtrq->dtrq_list);
 425                         dtrq->dtrq_lur->lur_update_rec.ur_master_transno =
 426                                                 record->ur_master_transno;
 427
 428                         dtrq->dtrq_master_transno = record->ur_master_transno;
 429                         replace_record = true;
 430                         /* try to insert again */
 431                         rc = dtrq_insert(tdtd, dtrq);
 432                         if (rc < 0) {
 433                                 spin_unlock(&tdtd->tdtd_replay_list_lock);
 434                                 dtrq_destroy(dtrq);
 435                                 return rc;
 436                         }
 437                 }
 438         }
 439         spin_unlock(&tdtd->tdtd_replay_list_lock);
 440
 441         /* Because there should be only thread access the update record, so
 442          * we do not need lock here */
 443         if (replace_record) {
 444                 /* Replace the update record and master transno */
 445                 OBD_FREE(dtrq->dtrq_lur, dtrq->dtrq_lur_size);
 446                 dtrq->dtrq_lur = NULL;
 447                 dtrq->dtrq_lur_size = llog_update_record_size(lur);
 448                 OBD_ALLOC_LARGE(dtrq->dtrq_lur, dtrq->dtrq_lur_size);
 449                 if (dtrq->dtrq_lur == NULL)
 450                         return -ENOMEM;
 451
 452                 memcpy(dtrq->dtrq_lur, lur, dtrq->dtrq_lur_size);
 453         }
 454
 455         /* This is a partial update records, let's try to append
 456          * the record to the current replay request */
 457         if (record->ur_flags & UPDATE_RECORD_CONTINUE)
 458                 rc = dtrq_append_updates(dtrq, record);
 459
 460         /* Then create and add sub update request */
 461         rc = dtrq_sub_create_and_insert(dtrq, cookie, mdt_index);
 462
 463         RETURN(rc);
 464 }
 465 EXPORT_SYMBOL(insert_update_records_to_replay_list);
 466
 467 /**
 468  * Dump updates of distribute txns.
 469  *
 470  * Output all of recovery updates in the distribute txn list to the
 471  * debug log.
 472  *
 473  * \param[in] tdtd      distribute txn data where all of distribute txn
 474  *                      are listed.
 475  * \param[in] mask      debug mask
 476  */
 477 void dtrq_list_dump(struct target_distribute_txn_data *tdtd, unsigned int mask)
 478 {
 479         struct distribute_txn_replay_req *dtrq;
 480
 481         spin_lock(&tdtd->tdtd_replay_list_lock);
 482         list_for_each_entry(dtrq, &tdtd->tdtd_replay_list, dtrq_list)
 483                 update_records_dump(&dtrq->dtrq_lur->lur_update_rec, mask,
 484                                     false);
 485         spin_unlock(&tdtd->tdtd_replay_list_lock);
 486 }
 487 EXPORT_SYMBOL(dtrq_list_dump);
 488
 489 /**
 490  * Destroy distribute txn replay req
 491  *
 492  * Destroy distribute txn replay req and all of subs.
 493  *
 494  * \param[in] dtrq      distribute txn replqy req to be destroyed.
 495  */
 496 void dtrq_destroy(struct distribute_txn_replay_req *dtrq)
 497 {
 498         struct distribute_txn_replay_req_sub    *dtrqs;
 499         struct distribute_txn_replay_req_sub    *tmp;
 500
 501         LASSERT(list_empty(&dtrq->dtrq_list));
 502         spin_lock(&dtrq->dtrq_sub_list_lock);
 503         list_for_each_entry_safe(dtrqs, tmp, &dtrq->dtrq_sub_list, dtrqs_list) {
 504                 struct sub_thandle_cookie *stc;
 505                 struct sub_thandle_cookie *tmp;
 506
 507                 list_del(&dtrqs->dtrqs_list);
 508                 list_for_each_entry_safe(stc, tmp, &dtrqs->dtrqs_cookie_list,
 509                                          stc_list) {
 510                         list_del(&stc->stc_list);
 511                         OBD_FREE_PTR(stc);
 512                 }
 513                 OBD_FREE_PTR(dtrqs);
 514         }
 515         spin_unlock(&dtrq->dtrq_sub_list_lock);
 516
 517         if (dtrq->dtrq_lur != NULL)
 518                 OBD_FREE_LARGE(dtrq->dtrq_lur, dtrq->dtrq_lur_size);
 519
 520         OBD_FREE_PTR(dtrq);
 521 }
 522 EXPORT_SYMBOL(dtrq_destroy);
 523
 524 /**
 525  * Destroy all of replay req.
 526  *
 527  * Destroy all of replay req in the replay list.
 528  *
 529  * \param[in] tdtd      target distribute txn data where the replay list is.
 530  */
 531 void dtrq_list_destroy(struct target_distribute_txn_data *tdtd)
 532 {
 533         struct distribute_txn_replay_req *dtrq;
 534         struct distribute_txn_replay_req *tmp;
 535
 536         spin_lock(&tdtd->tdtd_replay_list_lock);
 537         list_for_each_entry_safe(dtrq, tmp, &tdtd->tdtd_replay_list,
 538                                  dtrq_list) {
 539                 list_del_init(&dtrq->dtrq_list);
 540                 dtrq_destroy(dtrq);
 541         }
 542         spin_unlock(&tdtd->tdtd_replay_list_lock);
 543 }
 544 EXPORT_SYMBOL(dtrq_list_destroy);
 545
 546 /**
 547  * Get next req in the replay list
 548  *
 549  * Get next req needs to be replayed, since it is a sorted list
 550  * (by master MDT transno)
 551  *
 552  * \param[in] tdtd      distribute txn data where the replay list is
 553  *
 554  * \retval              the pointer of update recovery header
 555  */
 556 struct distribute_txn_replay_req *
 557 distribute_txn_get_next_req(struct target_distribute_txn_data *tdtd)
 558 {
 559         struct distribute_txn_replay_req *dtrq = NULL;
 560
 561         spin_lock(&tdtd->tdtd_replay_list_lock);
 562         if (!list_empty(&tdtd->tdtd_replay_list)) {
 563                 dtrq = list_entry(tdtd->tdtd_replay_list.next,
 564                                  struct distribute_txn_replay_req, dtrq_list);
 565                 list_del_init(&dtrq->dtrq_list);
 566         }
 567         spin_unlock(&tdtd->tdtd_replay_list_lock);
 568
 569         return dtrq;
 570 }
 571 EXPORT_SYMBOL(distribute_txn_get_next_req);
 572
 573 /**
 574  * Get next transno in the replay list, because this is the sorted
 575  * list, so it will return the transno of next req in the list.
 576  *
 577  * \param[in] tdtd      distribute txn data where the replay list is
 578  *
 579  * \retval              the transno of next update in the list
 580  */
 581 __u64 distribute_txn_get_next_transno(struct target_distribute_txn_data *tdtd)
 582 {
 583         struct distribute_txn_replay_req        *dtrq = NULL;
 584         __u64                                   transno = 0;
 585
 586         spin_lock(&tdtd->tdtd_replay_list_lock);
 587         if (!list_empty(&tdtd->tdtd_replay_list)) {
 588                 dtrq = list_entry(tdtd->tdtd_replay_list.next,
 589                                  struct distribute_txn_replay_req, dtrq_list);
 590                 transno = dtrq->dtrq_master_transno;
 591         }
 592         spin_unlock(&tdtd->tdtd_replay_list_lock);
 593
 594         CDEBUG(D_HA, "%s: Next update transno "LPU64"\n",
 595                tdtd->tdtd_lut->lut_obd->obd_name, transno);
 596         return transno;
 597 }
 598 EXPORT_SYMBOL(distribute_txn_get_next_transno);
 599
 600 /**
 601  * Check if the update of one object is committed
 602  *
 603  * Check whether the update for the object is committed by checking whether
 604  * the correspondent sub exists in the replay req. If it is committed, mark
 605  * the committed flag in correspondent the sub thandle.
 606  *
 607  * \param[in] env       execution environment
 608  * \param[in] dtrq      replay request
 609  * \param[in] dt_obj    object for the update
 610  * \param[in] top_th    top thandle
 611  * \param[in] sub_th    sub thandle which the update belongs to
 612  *
 613  * \retval              1 if the update is not committed.
 614  * \retval              0 if the update is committed.
 615  * \retval              negative errno if some other failures happen.
 616  */
 617 static int update_is_committed(const struct lu_env *env,
 618                                struct distribute_txn_replay_req *dtrq,
 619                                struct dt_object *dt_obj,
 620                                struct top_thandle *top_th,
 621                                struct sub_thandle *st)
 622 {
 623         struct seq_server_site  *seq_site;
 624         const struct lu_fid     *fid = lu_object_fid(&dt_obj->do_lu);
 625         struct distribute_txn_replay_req_sub    *dtrqs;
 626         __u32                   mdt_index;
 627         ENTRY;
 628
 629         if (st->st_sub_th != NULL)
 630                 RETURN(1);
 631
 632         if (st->st_committed)
 633                 RETURN(0);
 634
 635         seq_site = lu_site2seq(dt_obj->do_lu.lo_dev->ld_site);
 636         if (fid_is_update_log(fid) || fid_is_update_log_dir(fid)) {
 637                 mdt_index = fid_oid(fid);
 638         } else if (!fid_seq_in_fldb(fid_seq(fid))) {
 639                 mdt_index = seq_site->ss_node_id;
 640         } else {
 641                 struct lu_server_fld *fld;
 642                 struct lu_seq_range range = {0};
 643                 int rc;
 644
 645                 fld = seq_site->ss_server_fld;
 646                 fld_range_set_type(&range, LU_SEQ_RANGE_MDT);
 647                 LASSERT(fld->lsf_seq_lookup != NULL);
 648                 rc = fld->lsf_seq_lookup(env, fld, fid_seq(fid),
 649                                          &range);
 650                 if (rc < 0)
 651                         RETURN(rc);
 652                 mdt_index = range.lsr_index;
 653         }
 654
 655         dtrqs = dtrq_sub_lookup(dtrq, mdt_index);
 656         if (dtrqs != NULL || top_th->tt_multiple_thandle->tmt_committed) {
 657                 st->st_committed = 1;
 658                 if (dtrqs != NULL) {
 659                         struct sub_thandle_cookie *stc;
 660                         struct sub_thandle_cookie *tmp;
 661
 662                         list_for_each_entry_safe(stc, tmp,
 663                                                  &dtrqs->dtrqs_cookie_list,
 664                                                  stc_list)
 665                                 list_move(&stc->stc_list, &st->st_cookie_list);
 666                 }
 667                 RETURN(0);
 668         }
 669
 670         CDEBUG(D_HA, "Update of "DFID "on MDT%u is not committed\n", PFID(fid),
 671                mdt_index);
 672
 673         RETURN(1);
 674 }
 675
 676 /**
 677  * Implementation of different update methods for update recovery.
 678  *
 679  * These following functions update_recovery_$(update_name) implement
 680  * different updates recovery methods. They will extract the parameters
 681  * from the common parameters area and call correspondent dt API to redo
 682  * the update.
 683  *
 684  * \param[in] env       execution environment
 685  * \param[in] op        update operation to be replayed
 686  * \param[in] params    common update parameters which holds all parameters
 687  *                      of the operation
 688  * \param[in] th        transaction handle
 689  * \param[in] declare   indicate it will do declare or real execution, true
 690  *                      means declare, false means real execution
 691  *
 692  * \retval              0 if it succeeds.
 693  * \retval              negative errno if it fails.
 694  */
 695 static int update_recovery_create(const struct lu_env *env,
 696                                   struct dt_object *dt_obj,
 697                                   const struct update_op *op,
 698                                   const struct update_params *params,
 699                                   struct thandle_exec_args *ta,
 700                                   struct thandle *th)
 701 {
 702         struct update_thread_info *uti = update_env_info(env);
 703         struct llog_update_record *lur = uti->uti_dtrq->dtrq_lur;
 704         struct lu_attr          *attr = &uti->uti_attr;
 705         struct obdo             *wobdo;
 706         struct obdo             *lobdo = &uti->uti_obdo;
 707         struct dt_object_format dof;
 708         __u16                   size;
 709         unsigned int            param_count;
 710         int rc;
 711         ENTRY;
 712
 713         if (dt_object_exists(dt_obj))
 714                 RETURN(-EEXIST);
 715
 716         param_count = lur->lur_update_rec.ur_param_count;
 717         wobdo = update_params_get_param_buf(params, op->uop_params_off[0],
 718                                             param_count, &size);
 719         if (wobdo == NULL)
 720                 RETURN(-EIO);
 721         if (size != sizeof(*wobdo))
 722                 RETURN(-EIO);
 723
 724         if (LLOG_REC_HDR_NEEDS_SWABBING(&lur->lur_hdr))
 725                 lustre_swab_obdo(wobdo);
 726
 727         lustre_get_wire_obdo(NULL, lobdo, wobdo);
 728         la_from_obdo(attr, lobdo, lobdo->o_valid);
 729
 730         dof.dof_type = dt_mode_to_dft(attr->la_mode);
 731
 732         rc = out_tx_create(env, dt_obj, attr, NULL, &dof,
 733                            ta, th, NULL, 0);
 734
 735         RETURN(rc);
 736 }
 737
 738 static int update_recovery_destroy(const struct lu_env *env,
 739                                    struct dt_object *dt_obj,
 740                                    const struct update_op *op,
 741                                    const struct update_params *params,
 742                                    struct thandle_exec_args *ta,
 743                                    struct thandle *th)
 744 {
 745         int rc;
 746         ENTRY;
 747
 748         rc = out_tx_destroy(env, dt_obj, ta, th, NULL, 0);
 749
 750         RETURN(rc);
 751 }
 752
 753 static int update_recovery_ref_add(const struct lu_env *env,
 754                                    struct dt_object *dt_obj,
 755                                    const struct update_op *op,
 756                                    const struct update_params *params,
 757                                    struct thandle_exec_args *ta,
 758                                    struct thandle *th)
 759 {
 760         int rc;
 761         ENTRY;
 762
 763         rc = out_tx_ref_add(env, dt_obj, ta, th, NULL, 0);
 764
 765         RETURN(rc);
 766 }
 767
 768 static int update_recovery_ref_del(const struct lu_env *env,
 769                                    struct dt_object *dt_obj,
 770                                    const struct update_op *op,
 771                                    const struct update_params *params,
 772                                    struct thandle_exec_args *ta,
 773                                    struct thandle *th)
 774 {
 775         int rc;
 776         ENTRY;
 777
 778         rc = out_tx_ref_del(env, dt_obj, ta, th, NULL, 0);
 779
 780         RETURN(rc);
 781 }
 782
 783 static int update_recovery_attr_set(const struct lu_env *env,
 784                                     struct dt_object *dt_obj,
 785                                     const struct update_op *op,
 786                                     const struct update_params *params,
 787                                     struct thandle_exec_args *ta,
 788                                     struct thandle *th)
 789 {
 790         struct update_thread_info *uti = update_env_info(env);
 791         struct llog_update_record *lur = uti->uti_dtrq->dtrq_lur;
 792         struct obdo     *wobdo;
 793         struct obdo     *lobdo = &uti->uti_obdo;
 794         struct lu_attr  *attr = &uti->uti_attr;
 795         __u16           size;
 796         unsigned int    param_count;
 797         int             rc;
 798         ENTRY;
 799
 800         param_count = lur->lur_update_rec.ur_param_count;
 801         wobdo = update_params_get_param_buf(params, op->uop_params_off[0],
 802                                             param_count, &size);
 803         if (wobdo == NULL)
 804                 RETURN(-EIO);
 805         if (size != sizeof(*wobdo))
 806                 RETURN(-EIO);
 807
 808         if (LLOG_REC_HDR_NEEDS_SWABBING(&lur->lur_hdr))
 809                 lustre_swab_obdo(wobdo);
 810
 811         lustre_get_wire_obdo(NULL, lobdo, wobdo);
 812         la_from_obdo(attr, lobdo, lobdo->o_valid);
 813
 814         rc = out_tx_attr_set(env, dt_obj, attr, ta, th, NULL, 0);
 815
 816         RETURN(rc);
 817 }
 818
 819 static int update_recovery_xattr_set(const struct lu_env *env,
 820                                      struct dt_object *dt_obj,
 821                                      const struct update_op *op,
 822                                      const struct update_params *params,
 823                                      struct thandle_exec_args *ta,
 824                                      struct thandle *th)
 825 {
 826         struct update_thread_info *uti = update_env_info(env);
 827         char            *buf;
 828         char            *name;
 829         int             fl;
 830         __u16           size;
 831         __u32           param_count;
 832         int             rc;
 833         ENTRY;
 834
 835         param_count = uti->uti_dtrq->dtrq_lur->lur_update_rec.ur_param_count;
 836         name = update_params_get_param_buf(params,
 837                                            op->uop_params_off[0],
 838                                            param_count, &size);
 839         if (name == NULL)
 840                 RETURN(-EIO);
 841
 842         buf = update_params_get_param_buf(params,
 843                                           op->uop_params_off[1],
 844                                           param_count, &size);
 845         if (buf == NULL)
 846                 RETURN(-EIO);
 847
 848         uti->uti_buf.lb_buf = buf;
 849         uti->uti_buf.lb_len = (size_t)size;
 850
 851         buf = update_params_get_param_buf(params, op->uop_params_off[2],
 852                                           param_count, &size);
 853         if (buf == NULL)
 854                 RETURN(-EIO);
 855         if (size != sizeof(fl))
 856                 RETURN(-EIO);
 857
 858         fl = le32_to_cpu(*(int *)buf);
 859
 860         rc = out_tx_xattr_set(env, dt_obj, &uti->uti_buf, name, fl, ta, th,
 861                               NULL, 0);
 862
 863         RETURN(rc);
 864 }
 865
 866 static int update_recovery_index_insert(const struct lu_env *env,
 867                                         struct dt_object *dt_obj,
 868                                         const struct update_op *op,
 869                                         const struct update_params *params,
 870                                         struct thandle_exec_args *ta,
 871                                         struct thandle *th)
 872 {
 873         struct update_thread_info *uti = update_env_info(env);
 874         struct lu_fid           *fid;
 875         char                    *name;
 876         __u32                   param_count;
 877         __u32                   *ptype;
 878         __u32                   type;
 879         __u16                   size;
 880         int rc;
 881         ENTRY;
 882
 883         param_count = uti->uti_dtrq->dtrq_lur->lur_update_rec.ur_param_count;
 884         name = update_params_get_param_buf(params, op->uop_params_off[0],
 885                                            param_count, &size);
 886         if (name == NULL)
 887                 RETURN(-EIO);
 888
 889         fid = update_params_get_param_buf(params, op->uop_params_off[1],
 890                                           param_count, &size);
 891         if (fid == NULL)
 892                 RETURN(-EIO);
 893         if (size != sizeof(*fid))
 894                 RETURN(-EIO);
 895
 896         fid_le_to_cpu(fid, fid);
 897
 898         ptype = update_params_get_param_buf(params, op->uop_params_off[2],
 899                                             param_count, &size);
 900         if (ptype == NULL)
 901                 RETURN(-EIO);
 902         if (size != sizeof(*ptype))
 903                 RETURN(-EIO);
 904         type = le32_to_cpu(*ptype);
 905
 906         if (dt_try_as_dir(env, dt_obj) == 0)
 907                 RETURN(-ENOTDIR);
 908
 909         uti->uti_rec.rec_fid = fid;
 910         uti->uti_rec.rec_type = type;
 911
 912         rc = out_tx_index_insert(env, dt_obj,
 913                                  (const struct dt_rec *)&uti->uti_rec,
 914                                  (const struct dt_key *)name, ta, th,
 915                                  NULL, 0);
 916
 917         RETURN(rc);
 918 }
 919
 920 static int update_recovery_index_delete(const struct lu_env *env,
 921                                         struct dt_object *dt_obj,
 922                                         const struct update_op *op,
 923                                         const struct update_params *params,
 924                                         struct thandle_exec_args *ta,
 925                                         struct thandle *th)
 926 {
 927         struct update_thread_info *uti = update_env_info(env);
 928         __u32   param_count;
 929         char    *name;
 930         __u16   size;
 931         int     rc;
 932         ENTRY;
 933
 934         param_count = uti->uti_dtrq->dtrq_lur->lur_update_rec.ur_param_count;
 935         name = update_params_get_param_buf(params, op->uop_params_off[0],
 936                                            param_count, &size);
 937         if (name == NULL)
 938                 RETURN(-EIO);
 939
 940         if (dt_try_as_dir(env, dt_obj) == 0)
 941                 RETURN(-ENOTDIR);
 942
 943         rc = out_tx_index_delete(env, dt_obj,
 944                                  (const struct dt_key *)name, ta, th, NULL, 0);
 945
 946         RETURN(rc);
 947 }
 948
 949 static int update_recovery_write(const struct lu_env *env,
 950                                  struct dt_object *dt_obj,
 951                                  const struct update_op *op,
 952                                  const struct update_params *params,
 953                                  struct thandle_exec_args *ta,
 954                                  struct thandle *th)
 955 {
 956         struct update_thread_info *uti = update_env_info(env);
 957         char            *buf;
 958         __u32           param_count;
 959         __u64           pos;
 960         __u16           size;
 961         int rc;
 962         ENTRY;
 963
 964         param_count = uti->uti_dtrq->dtrq_lur->lur_update_rec.ur_param_count;
 965         buf = update_params_get_param_buf(params, op->uop_params_off[0],
 966                                           param_count, &size);
 967         if (buf == NULL)
 968                 RETURN(-EIO);
 969
 970         uti->uti_buf.lb_buf = buf;
 971         uti->uti_buf.lb_len = size;
 972
 973         buf = update_params_get_param_buf(params, op->uop_params_off[1],
 974                                           param_count, &size);
 975         if (buf == NULL)
 976                 RETURN(-EIO);
 977
 978         pos = le64_to_cpu(*(__u64 *)buf);
 979
 980         rc = out_tx_write(env, dt_obj, &uti->uti_buf, pos,
 981                           ta, th, NULL, 0);
 982
 983         RETURN(rc);
 984 }
 985
 986 static int update_recovery_xattr_del(const struct lu_env *env,
 987                                      struct dt_object *dt_obj,
 988                                      const struct update_op *op,
 989                                      const struct update_params *params,
 990                                      struct thandle_exec_args *ta,
 991                                      struct thandle *th)
 992 {
 993         struct update_thread_info *uti = update_env_info(env);
 994         __u32   param_count;
 995         char    *name;
 996         __u16   size;
 997         int     rc;
 998         ENTRY;
 999
1000         param_count = uti->uti_dtrq->dtrq_lur->lur_update_rec.ur_param_count;
1001         name = update_params_get_param_buf(params, op->uop_params_off[0],
1002                                            param_count, &size);
1003         if (name == NULL)
1004                 RETURN(-EIO);
1005
1006         rc = out_tx_xattr_del(env, dt_obj, name, ta, th, NULL, 0);
1007
1008         RETURN(rc);
1009 }
1010
1011 /**
1012  * Execute updates in the update replay records
1013  *
1014  * Declare distribute txn replay by update records and add the updates
1015  * to the execution list. Note: it will check if the update has been
1016  * committed, and only execute the updates if it is not committed to
1017  * disk.
1018  *
1019  * \param[in] env       execution environment
1020  * \param[in] tdtd      distribute txn replay data which hold all of replay
1021  *                      reqs and all replay parameters.
1022  * \param[in] dtrq      distribute transaction replay req.
1023  * \param[in] ta        thandle execute args.
1024  *
1025  * \retval              0 if declare succeeds.
1026  * \retval              negative errno if declare fails.
1027  */
1028 static int update_recovery_exec(const struct lu_env *env,
1029                                 struct target_distribute_txn_data *tdtd,
1030                                 struct distribute_txn_replay_req *dtrq,
1031                                 struct thandle_exec_args *ta)
1032 {
1033         struct llog_update_record *lur = dtrq->dtrq_lur;
1034         struct update_records   *records = &lur->lur_update_rec;
1035         struct update_ops       *ops = &records->ur_ops;
1036         struct update_params    *params = update_records_get_params(records);
1037         struct top_thandle      *top_th = container_of(ta->ta_handle,
1038                                                        struct top_thandle,
1039                                                        tt_super);
1040         struct top_multiple_thandle *tmt = top_th->tt_multiple_thandle;
1041         struct update_op        *op;
1042         unsigned int            i;
1043         int                     rc = 0;
1044         ENTRY;
1045
1046         /* These records have been swabbed in llog_cat_process() */
1047         for (i = 0, op = &ops->uops_op[0]; i < records->ur_update_count;
1048              i++, op = update_op_next_op(op)) {
1049                 struct lu_fid           *fid = &op->uop_fid;
1050                 struct dt_object        *dt_obj;
1051                 struct dt_object        *sub_dt_obj;
1052                 struct dt_device        *sub_dt;
1053                 struct sub_thandle      *st;
1054
1055                 if (op->uop_type == OUT_NOOP)
1056                         continue;
1057
1058                 dt_obj = dt_locate(env, tdtd->tdtd_dt, fid);
1059                 if (IS_ERR(dt_obj)) {
1060                         rc = PTR_ERR(dt_obj);
1061                         break;
1062                 }
1063                 sub_dt_obj = dt_object_child(dt_obj);
1064
1065                 /* Create sub thandle if not */
1066                 sub_dt = lu2dt_dev(sub_dt_obj->do_lu.lo_dev);
1067                 st = lookup_sub_thandle(tmt, sub_dt);
1068                 if (st == NULL) {
1069                         st = create_sub_thandle(tmt, sub_dt);
1070                         if (IS_ERR(st))
1071                                 GOTO(next, rc = PTR_ERR(st));
1072                 }
1073
1074                 /* check if updates on the OSD/OSP are committed */
1075                 rc = update_is_committed(env, dtrq, dt_obj, top_th, st);
1076                 if (rc == 0)
1077                         /* If this is committed, goto next */
1078                         goto next;
1079
1080                 if (rc < 0)
1081                         GOTO(next, rc);
1082
1083                 /* Create thandle for sub thandle if needed */
1084                 if (st->st_sub_th == NULL) {
1085                         rc = sub_thandle_trans_create(env, top_th, st);
1086                         if (rc != 0)
1087                                 GOTO(next, rc);
1088                 }
1089
1090                 CDEBUG(D_HA, "replay %uth update\n", i);
1091                 switch (op->uop_type) {
1092                 case OUT_CREATE:
1093                         rc = update_recovery_create(env, sub_dt_obj,
1094                                                     op, params, ta,
1095                                                     st->st_sub_th);
1096                         break;
1097                 case OUT_DESTROY:
1098                         rc = update_recovery_destroy(env, sub_dt_obj,
1099                                                      op, params, ta,
1100                                                      st->st_sub_th);
1101                         break;
1102                 case OUT_REF_ADD:
1103                         rc = update_recovery_ref_add(env, sub_dt_obj,
1104                                                      op, params, ta,
1105                                                      st->st_sub_th);
1106                         break;
1107                 case OUT_REF_DEL:
1108                         rc = update_recovery_ref_del(env, sub_dt_obj,
1109                                                      op, params, ta,
1110                                                      st->st_sub_th);
1111                         break;
1112                 case OUT_ATTR_SET:
1113                         rc = update_recovery_attr_set(env, sub_dt_obj,
1114                                                       op, params, ta,
1115                                                       st->st_sub_th);
1116                         break;
1117                 case OUT_XATTR_SET:
1118                         rc = update_recovery_xattr_set(env, sub_dt_obj,
1119                                                        op, params, ta,
1120                                                        st->st_sub_th);
1121                         break;
1122                 case OUT_INDEX_INSERT:
1123                         rc = update_recovery_index_insert(env, sub_dt_obj,
1124                                                           op, params, ta,
1125                                                           st->st_sub_th);
1126                         break;
1127                 case OUT_INDEX_DELETE:
1128                         rc = update_recovery_index_delete(env, sub_dt_obj,
1129                                                           op, params, ta,
1130                                                           st->st_sub_th);
1131                         break;
1132                 case OUT_WRITE:
1133                         rc = update_recovery_write(env, sub_dt_obj,
1134                                                    op, params, ta,
1135                                                    st->st_sub_th);
1136                         break;
1137                 case OUT_XATTR_DEL:
1138                         rc = update_recovery_xattr_del(env, sub_dt_obj,
1139                                                        op, params, ta,
1140                                                        st->st_sub_th);
1141                         break;
1142                 default:
1143                         CERROR("Unknown update type %u\n", (__u32)op->uop_type);
1144                         rc = -EINVAL;
1145                         break;
1146                 }
1147 next:
1148                 lu_object_put(env, &dt_obj->do_lu);
1149                 if (rc < 0)
1150                         break;
1151         }
1152
1153         ta->ta_handle->th_result = rc;
1154         RETURN(rc);
1155 }
1156
1157 /**
1158  * redo updates on MDT if needed.
1159  *
1160  * During DNE recovery, the recovery thread (target_recovery_thread) will call
1161  * this function to replay distribute txn updates on all MDTs. It only replay
1162  * updates on the MDT where the update record is missing.
1163  *
1164  * If the update already exists on the MDT, then it does not need replay the
1165  * updates on that MDT, and only mark the sub transaction has been committed
1166  * there.
1167  *
1168  * \param[in] env       execution environment
1169  * \param[in] tdtd      target distribute txn data, which holds the replay list
1170  *                      and all parameters needed by replay process.
1171  * \param[in] dtrq      distribute txn replay req.
1172  *
1173  * \retval              0 if replay succeeds.
1174  * \retval              negative errno if replay failes.
1175  */
1176 int distribute_txn_replay_handle(struct lu_env *env,
1177                                  struct target_distribute_txn_data *tdtd,
1178                                  struct distribute_txn_replay_req *dtrq)
1179 {
1180         struct update_records   *records = &dtrq->dtrq_lur->lur_update_rec;
1181         struct thandle_exec_args *ta;
1182         struct lu_context       session_env;
1183         struct thandle          *th = NULL;
1184         struct top_thandle      *top_th;
1185         struct top_multiple_thandle *tmt;
1186         struct thandle_update_records *tur = NULL;
1187         int                     i;
1188         int                     rc = 0;
1189         ENTRY;
1190
1191         /* initialize session, it is needed for the handler of target */
1192         rc = lu_context_init(&session_env, LCT_SERVER_SESSION | LCT_NOREF);
1193         if (rc) {
1194                 CERROR("%s: failure to initialize session: rc = %d\n",
1195                        tdtd->tdtd_lut->lut_obd->obd_name, rc);
1196                 RETURN(rc);
1197         }
1198         lu_context_enter(&session_env);
1199         env->le_ses = &session_env;
1200         lu_env_refill(env);
1201         update_records_dump(records, D_HA, true);
1202         th = top_trans_create(env, NULL);
1203         if (IS_ERR(th))
1204                 GOTO(exit_session, rc = PTR_ERR(th));
1205
1206         ta = &update_env_info(env)->uti_tea;
1207         ta->ta_argno = 0;
1208
1209         update_env_info(env)->uti_dtrq = dtrq;
1210         /* Create distribute transaction structure for this top thandle */
1211         top_th = container_of(th, struct top_thandle, tt_super);
1212         rc = top_trans_create_tmt(env, top_th);
1213         if (rc < 0)
1214                 GOTO(stop_trans, rc);
1215
1216         ta->ta_handle = th;
1217
1218         /* check if the distribute transaction has been committed */
1219         tmt = top_th->tt_multiple_thandle;
1220         tmt->tmt_master_sub_dt = tdtd->tdtd_lut->lut_bottom;
1221         tmt->tmt_batchid = dtrq->dtrq_batchid;
1222         tgt_th_info(env)->tti_transno = dtrq->dtrq_master_transno;
1223
1224         if (tmt->tmt_batchid <= tdtd->tdtd_committed_batchid)
1225                 tmt->tmt_committed = 1;
1226
1227         rc = update_recovery_exec(env, tdtd, dtrq, ta);
1228         if (rc < 0)
1229                 GOTO(stop_trans, rc);
1230
1231         /* If no updates are needed to be replayed, then
1232          * mark this records as committed, so commit thread
1233          * distribute_txn_commit_thread() will delete the
1234          * record */
1235         if (ta->ta_argno == 0)
1236                 tmt->tmt_committed = 1;
1237
1238         tur = &update_env_info(env)->uti_tur;
1239         tur->tur_update_records = dtrq->dtrq_lur;
1240         tur->tur_update_records_buf_size = dtrq->dtrq_lur_size;
1241         tur->tur_update_params = NULL;
1242         tur->tur_update_param_count = 0;
1243         tmt->tmt_update_records = tur;
1244
1245         distribute_txn_insert_by_batchid(tmt);
1246         rc = top_trans_start(env, NULL, th);
1247         if (rc < 0)
1248                 GOTO(stop_trans, rc);
1249
1250         for (i = 0; i < ta->ta_argno; i++) {
1251                 struct tx_arg           *ta_arg;
1252                 struct dt_object        *dt_obj;
1253                 struct dt_device        *sub_dt;
1254                 struct sub_thandle      *st;
1255
1256                 ta_arg = ta->ta_args[i];
1257                 dt_obj = ta_arg->object;
1258
1259                 LASSERT(tmt->tmt_committed == 0);
1260                 sub_dt = lu2dt_dev(dt_obj->do_lu.lo_dev);
1261                 st = lookup_sub_thandle(tmt, sub_dt);
1262                 LASSERT(st != NULL);
1263                 LASSERT(st->st_sub_th != NULL);
1264                 rc = ta->ta_args[i]->exec_fn(env, st->st_sub_th,
1265                                              ta->ta_args[i]);
1266                 if (unlikely(rc < 0)) {
1267                         CDEBUG(D_HA, "error during execution of #%u from"
1268                                " %s:%d: rc = %d\n", i, ta->ta_args[i]->file,
1269                                ta->ta_args[i]->line, rc);
1270                         while (--i > 0) {
1271                                 if (ta->ta_args[i]->undo_fn != NULL) {
1272                                         dt_obj = ta->ta_args[i]->object;
1273                                         sub_dt =
1274                                                 lu2dt_dev(dt_obj->do_lu.lo_dev);
1275                                         st = lookup_sub_thandle(tmt, sub_dt);
1276                                         LASSERT(st != NULL);
1277                                         LASSERT(st->st_sub_th != NULL);
1278
1279                                         ta->ta_args[i]->undo_fn(env,
1280                                                                st->st_sub_th,
1281                                                                ta->ta_args[i]);
1282                                 } else {
1283                                         CERROR("%s: undo for %s:%d: rc = %d\n",
1284                                              dt_obd_name(ta->ta_handle->th_dev),
1285                                                ta->ta_args[i]->file,
1286                                                ta->ta_args[i]->line, -ENOTSUPP);
1287                                 }
1288                         }
1289                         break;
1290                 }
1291                 CDEBUG(D_HA, "%s: executed %u/%u: rc = %d\n",
1292                        dt_obd_name(sub_dt), i, ta->ta_argno, rc);
1293         }
1294
1295 stop_trans:
1296         if (rc < 0)
1297                 th->th_result = rc;
1298         rc = top_trans_stop(env, tdtd->tdtd_dt, th);
1299         for (i = 0; i < ta->ta_argno; i++) {
1300                 if (ta->ta_args[i]->object != NULL) {
1301                         lu_object_put(env, &ta->ta_args[i]->object->do_lu);
1302                         ta->ta_args[i]->object = NULL;
1303                 }
1304         }
1305
1306         if (tur != NULL)
1307                 tur->tur_update_records = NULL;
1308 exit_session:
1309         lu_context_exit(&session_env);
1310         lu_context_fini(&session_env);
1311         RETURN(rc);
1312 }
1313 EXPORT_SYMBOL(distribute_txn_replay_handle);