lustre/obdclass/llog_cat.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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/obdclass/llog_cat.c
  32  *
  33  * OST<->MDS recovery logging infrastructure.
  34  *
  35  * Invariants in implementation:
  36  * - we do not share logs among different OST<->MDS connections, so that
  37  *   if an OST or MDS fails it need only look at log(s) relevant to itself
  38  *
  39  * Author: Andreas Dilger <adilger@clusterfs.com>
  40  * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
  41  * Author: Mikhail Pershin <mike.pershin@intel.com>
  42  */
  43
  44 #define DEBUG_SUBSYSTEM S_LOG
  45
  46
  47 #include <obd_class.h>
  48
  49 #include "llog_internal.h"
  50
  51
  52 /**
  53  * lockdep markers for nested struct llog_handle::lgh_lock locking.
  54  */
  55 enum {
  56         LLOGH_CAT,
  57         LLOGH_LOG,
  58 };
  59
  60 /* Create a new log handle and add it to the open list.
  61  * This log handle will be closed when all of the records in it are removed.
  62  *
  63  * Assumes caller has already pushed us into the kernel context and is locking.
  64  */
  65 static int llog_cat_new_log(const struct lu_env *env,
  66                             struct llog_handle *cathandle,
  67                             struct llog_handle *loghandle,
  68                             struct thandle *th)
  69 {
  70         struct llog_thread_info *lgi = llog_info(env);
  71         struct llog_logid_rec   *rec = &lgi->lgi_logid;
  72         struct thandle *handle = NULL;
  73         struct dt_device *dt = NULL;
  74         struct llog_log_hdr     *llh = cathandle->lgh_hdr;
  75         int                      rc, index;
  76
  77         ENTRY;
  78
  79         index = (cathandle->lgh_last_idx + 1) %
  80                 (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS) ? (cfs_fail_val + 1) :
  81                                                 LLOG_HDR_BITMAP_SIZE(llh));
  82
  83         /* check that new llog index will not overlap with the first one.
  84          * - llh_cat_idx is the index just before the first/oldest still in-use
  85          *      index in catalog
  86          * - lgh_last_idx is the last/newest used index in catalog
  87          *
  88          * When catalog is not wrapped yet then lgh_last_idx is always larger
  89          * than llh_cat_idx. After the wrap around lgh_last_idx re-starts
  90          * from 0 and llh_cat_idx becomes the upper limit for it
  91          *
  92          * Check if catalog has already wrapped around or not by comparing
  93          * last_idx and cat_idx */
  94         if ((index == llh->llh_cat_idx + 1 && llh->llh_count > 1) ||
  95             (index == 0 && llh->llh_cat_idx == 0)) {
  96                 if (cathandle->lgh_name == NULL) {
  97                         CWARN("%s: there are no more free slots in catalog "DFID"\n",
  98                               loghandle2name(loghandle),
  99                               PLOGID(&cathandle->lgh_id));
 100                 } else {
 101                         CWARN("%s: there are no more free slots in catalog %s\n",
 102                               loghandle2name(loghandle), cathandle->lgh_name);
 103                 }
 104                 RETURN(-ENOSPC);
 105         }
 106
 107         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED))
 108                 RETURN(-ENOSPC);
 109
 110         if (loghandle->lgh_hdr != NULL) {
 111                 /* If llog object is remote and creation is failed, lgh_hdr
 112                  * might be left over here, free it first */
 113                 LASSERT(!llog_exist(loghandle));
 114                 OBD_FREE_LARGE(loghandle->lgh_hdr, loghandle->lgh_hdr_size);
 115                 loghandle->lgh_hdr = NULL;
 116         }
 117
 118         if (th == NULL) {
 119                 dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 120
 121                 handle = dt_trans_create(env, dt);
 122                 if (IS_ERR(handle))
 123                         RETURN(PTR_ERR(handle));
 124
 125                 /* Create update llog object synchronously, which
 126                  * happens during inialization process see
 127                  * lod_sub_prep_llog(), to make sure the update
 128                  * llog object is created before corss-MDT writing
 129                  * updates into the llog object */
 130                 if (cathandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID)
 131                         handle->th_sync = 1;
 132
 133                 handle->th_wait_submit = 1;
 134
 135                 rc = llog_declare_create(env, loghandle, handle);
 136                 if (rc != 0)
 137                         GOTO(out, rc);
 138
 139                 rec->lid_hdr.lrh_len = sizeof(*rec);
 140                 rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 141                 rec->lid_id = loghandle->lgh_id;
 142                 rc = llog_declare_write_rec(env, cathandle, &rec->lid_hdr, -1,
 143                                             handle);
 144                 if (rc != 0)
 145                         GOTO(out, rc);
 146
 147                 rc = dt_trans_start_local(env, dt, handle);
 148                 if (rc != 0)
 149                         GOTO(out, rc);
 150
 151                 th = handle;
 152         }
 153
 154         rc = llog_create(env, loghandle, th);
 155         /* if llog is already created, no need to initialize it */
 156         if (rc == -EEXIST) {
 157                 GOTO(out, rc = 0);
 158         } else if (rc != 0) {
 159                 CERROR("%s: can't create new plain llog in catalog: rc = %d\n",
 160                        loghandle2name(loghandle), rc);
 161                 GOTO(out, rc);
 162         }
 163
 164         rc = llog_init_handle(env, loghandle,
 165                               LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
 166                               &cathandle->lgh_hdr->llh_tgtuuid);
 167         if (rc < 0)
 168                 GOTO(out, rc);
 169
 170         /* build the record for this log in the catalog */
 171         rec->lid_hdr.lrh_len = sizeof(*rec);
 172         rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 173         rec->lid_id = loghandle->lgh_id;
 174
 175         /* append the new record into catalog. The new index will be
 176          * assigned to the record and updated in rec header */
 177         rc = llog_write_rec(env, cathandle, &rec->lid_hdr,
 178                             &loghandle->u.phd.phd_cookie, LLOG_NEXT_IDX, th);
 179         if (rc < 0)
 180                 GOTO(out_destroy, rc);
 181
 182         CDEBUG(D_OTHER, "new plain log "DFID".%u of catalog "DFID"\n",
 183                PLOGID(&loghandle->lgh_id), rec->lid_hdr.lrh_index,
 184                PLOGID(&cathandle->lgh_id));
 185
 186         loghandle->lgh_hdr->llh_cat_idx = rec->lid_hdr.lrh_index;
 187
 188         /* limit max size of plain llog so that space can be
 189          * released sooner, especially on small filesystems */
 190         /* 2MB for the cases when free space hasn't been learned yet */
 191         loghandle->lgh_max_size = 2 << 20;
 192         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 193         rc = dt_statfs(env, dt, &lgi->lgi_statfs);
 194         if (rc == 0 && lgi->lgi_statfs.os_bfree > 0) {
 195                 __u64 freespace = (lgi->lgi_statfs.os_bfree *
 196                                   lgi->lgi_statfs.os_bsize) >> 6;
 197                 if (freespace < loghandle->lgh_max_size)
 198                         loghandle->lgh_max_size = freespace;
 199                 /* shouldn't be > 128MB in any case?
 200                  * it's 256K records of 512 bytes each */
 201                 if (freespace > (128 << 20))
 202                         loghandle->lgh_max_size = 128 << 20;
 203         }
 204         if (unlikely(OBD_FAIL_PRECHECK(OBD_FAIL_PLAIN_RECORDS) ||
 205                      OBD_FAIL_PRECHECK(OBD_FAIL_CATALOG_FULL_CHECK))) {
 206                 // limit the numer of plain records for test
 207                 loghandle->lgh_max_size = loghandle->lgh_hdr_size +
 208                        cfs_fail_val * 64;
 209         }
 210
 211         rc = 0;
 212
 213 out:
 214         if (handle != NULL) {
 215                 handle->th_result = rc >= 0 ? 0 : rc;
 216                 dt_trans_stop(env, dt, handle);
 217         }
 218         RETURN(rc);
 219
 220 out_destroy:
 221         /* to signal llog_cat_close() it shouldn't try to destroy the llog,
 222          * we want to destroy it in this transaction, otherwise the object
 223          * becomes an orphan */
 224         loghandle->lgh_hdr->llh_flags &= ~LLOG_F_ZAP_WHEN_EMPTY;
 225         /* this is to mimic full log, so another llog_cat_current_log()
 226          * can skip it and ask for another onet */
 227         loghandle->lgh_last_idx = LLOG_HDR_BITMAP_SIZE(loghandle->lgh_hdr) + 1;
 228         llog_trans_destroy(env, loghandle, th);
 229         if (handle != NULL)
 230                 dt_trans_stop(env, dt, handle);
 231         RETURN(rc);
 232 }
 233
 234 static int llog_cat_refresh(const struct lu_env *env,
 235                             struct llog_handle *cathandle)
 236 {
 237         struct llog_handle *loghandle;
 238         int rc;
 239
 240         down_write(&cathandle->lgh_lock);
 241         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 242                             u.phd.phd_entry) {
 243                 if (!llog_exist(loghandle))
 244                         continue;
 245
 246                 down_write(&loghandle->lgh_lock);
 247                 rc = llog_read_header(env, loghandle, NULL);
 248                 up_write(&loghandle->lgh_lock);
 249                 if (rc)
 250                         goto unlock;
 251         }
 252
 253         rc = llog_read_header(env, cathandle, NULL);
 254 unlock:
 255         up_write(&cathandle->lgh_lock);
 256
 257         return rc;
 258 }
 259
 260 /*
 261  * prepare current/next log for catalog.
 262  *
 263  * if \a *ploghandle is NULL, open it, and declare create, NB, if \a
 264  * *ploghandle is remote, create it synchronously here, see comments
 265  * below.
 266  *
 267  * \a cathandle->lgh_lock is down_read-ed, it gets down_write-ed if \a
 268  * *ploghandle has to be opened.
 269  */
 270 static int llog_cat_prep_log(const struct lu_env *env,
 271                              struct llog_handle *cathandle,
 272                              struct llog_handle **ploghandle,
 273                              struct thandle *th)
 274 {
 275         int rc;
 276         int sem_upgraded;
 277
 278 start:
 279         rc = 0;
 280         sem_upgraded = 0;
 281         if (IS_ERR_OR_NULL(*ploghandle)) {
 282                 up_read(&cathandle->lgh_lock);
 283                 down_write(&cathandle->lgh_lock);
 284                 sem_upgraded = 1;
 285                 if (IS_ERR_OR_NULL(*ploghandle)) {
 286                         struct llog_handle *loghandle;
 287
 288                         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle,
 289                                        NULL, NULL, LLOG_OPEN_NEW);
 290                         if (!rc) {
 291                                 *ploghandle = loghandle;
 292                                 list_add_tail(&loghandle->u.phd.phd_entry,
 293                                               &cathandle->u.chd.chd_head);
 294                         }
 295                 }
 296                 if (rc)
 297                         GOTO(out, rc);
 298         }
 299
 300         rc = llog_exist(*ploghandle);
 301         if (rc < 0)
 302                 GOTO(out, rc);
 303         if (rc)
 304                 GOTO(out, rc = 0);
 305
 306         if (dt_object_remote(cathandle->lgh_obj)) {
 307                 down_write_nested(&(*ploghandle)->lgh_lock, LLOGH_LOG);
 308                 if (!llog_exist(*ploghandle)) {
 309                         /* For remote operation, if we put the llog object
 310                          * creation in the current transaction, then the
 311                          * llog object will not be created on the remote
 312                          * target until the transaction stop, if other
 313                          * operations start before the transaction stop,
 314                          * and use the same llog object, will be dependent
 315                          * on the success of this transaction. So let's
 316                          * create the llog object synchronously here to
 317                          * remove the dependency. */
 318                         rc = llog_cat_new_log(env, cathandle, *ploghandle,
 319                                               NULL);
 320                         if (rc == -ESTALE) {
 321                                 up_write(&(*ploghandle)->lgh_lock);
 322                                 if (sem_upgraded)
 323                                         up_write(&cathandle->lgh_lock);
 324                                 else
 325                                         up_read(&cathandle->lgh_lock);
 326
 327                                 rc = llog_cat_refresh(env, cathandle);
 328                                 down_read_nested(&cathandle->lgh_lock,
 329                                                  LLOGH_CAT);
 330                                 if (rc)
 331                                         return rc;
 332                                 /* *ploghandle might become NULL, restart */
 333                                 goto start;
 334                         }
 335                 }
 336                 up_write(&(*ploghandle)->lgh_lock);
 337         } else {
 338                 struct llog_thread_info *lgi = llog_info(env);
 339                 struct llog_logid_rec *lirec = &lgi->lgi_logid;
 340
 341                 rc = llog_declare_create(env, *ploghandle, th);
 342                 if (rc)
 343                         GOTO(out, rc);
 344
 345                 lirec->lid_hdr.lrh_len = sizeof(*lirec);
 346                 rc = llog_declare_write_rec(env, cathandle, &lirec->lid_hdr, -1,
 347                                             th);
 348         }
 349
 350 out:
 351         if (sem_upgraded) {
 352                 up_write(&cathandle->lgh_lock);
 353                 down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 354                 if (rc == 0)
 355                         goto start;
 356         }
 357         return rc;
 358 }
 359
 360 /* Open an existent log handle and add it to the open list.
 361  * This log handle will be closed when all of the records in it are removed.
 362  *
 363  * Assumes caller has already pushed us into the kernel context and is locking.
 364  * We return a lock on the handle to ensure nobody yanks it from us.
 365  *
 366  * This takes extra reference on llog_handle via llog_handle_get() and require
 367  * this reference to be put by caller using llog_handle_put()
 368  */
 369 int llog_cat_id2handle(const struct lu_env *env, struct llog_handle *cathandle,
 370                        struct llog_handle **res, struct llog_logid *logid)
 371 {
 372         struct llog_handle      *loghandle;
 373         enum llog_flag           fmt;
 374         int                      rc = 0;
 375
 376         ENTRY;
 377
 378         if (cathandle == NULL)
 379                 RETURN(-EBADF);
 380
 381         fmt = cathandle->lgh_hdr->llh_flags & LLOG_F_EXT_MASK;
 382         down_write(&cathandle->lgh_lock);
 383         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 384                             u.phd.phd_entry) {
 385                 struct llog_logid *cgl = &loghandle->lgh_id;
 386
 387                 if (ostid_id(&cgl->lgl_oi) == ostid_id(&logid->lgl_oi) &&
 388                     ostid_seq(&cgl->lgl_oi) == ostid_seq(&logid->lgl_oi)) {
 389                         *res = llog_handle_get(loghandle);
 390                         if (!*res) {
 391                                 CERROR("%s: log "DFID" refcount is zero!\n",
 392                                        loghandle2name(loghandle),
 393                                        PLOGID(logid));
 394                                 continue;
 395                         }
 396                         loghandle->u.phd.phd_cat_handle = cathandle;
 397                         up_write(&cathandle->lgh_lock);
 398                         RETURN(rc);
 399                 }
 400         }
 401         up_write(&cathandle->lgh_lock);
 402
 403         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle, logid, NULL,
 404                        LLOG_OPEN_EXISTS);
 405         if (rc < 0) {
 406                 CERROR("%s: error opening log id "DFID": rc = %d\n",
 407                        loghandle2name(cathandle), PLOGID(logid), rc);
 408                 RETURN(rc);
 409         }
 410
 411         rc = llog_init_handle(env, loghandle, LLOG_F_IS_PLAIN |
 412                               LLOG_F_ZAP_WHEN_EMPTY | fmt, NULL);
 413         if (rc < 0) {
 414                 llog_close(env, loghandle);
 415                 *res = NULL;
 416                 RETURN(rc);
 417         }
 418
 419         *res = llog_handle_get(loghandle);
 420         LASSERT(*res);
 421         down_write(&cathandle->lgh_lock);
 422         list_add_tail(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head);
 423         up_write(&cathandle->lgh_lock);
 424
 425         loghandle->u.phd.phd_cat_handle = cathandle;
 426         loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id;
 427         loghandle->u.phd.phd_cookie.lgc_index =
 428                                 loghandle->lgh_hdr->llh_cat_idx;
 429         RETURN(0);
 430 }
 431
 432 int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle)
 433 {
 434         struct llog_handle      *loghandle, *n;
 435         int                      rc;
 436
 437         ENTRY;
 438
 439         list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
 440                                  u.phd.phd_entry) {
 441                 struct llog_log_hdr     *llh = loghandle->lgh_hdr;
 442                 int                      index;
 443
 444                 /* unlink open-not-created llogs */
 445                 list_del_init(&loghandle->u.phd.phd_entry);
 446                 llh = loghandle->lgh_hdr;
 447                 if (loghandle->lgh_obj != NULL && llh != NULL &&
 448                     (llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 449                     (llh->llh_count == 1)) {
 450                         rc = llog_destroy(env, loghandle);
 451                         if (rc)
 452                                 CERROR("%s: failure destroying log during "
 453                                        "cleanup: rc = %d\n",
 454                                        loghandle2name(loghandle), rc);
 455
 456                         index = loghandle->u.phd.phd_cookie.lgc_index;
 457                         llog_cat_cleanup(env, cathandle, NULL, index);
 458                 }
 459                 llog_close(env, loghandle);
 460         }
 461         /* if handle was stored in ctxt, remove it too */
 462         if (cathandle->lgh_ctxt->loc_handle == cathandle)
 463                 cathandle->lgh_ctxt->loc_handle = NULL;
 464         rc = llog_close(env, cathandle);
 465         RETURN(rc);
 466 }
 467 EXPORT_SYMBOL(llog_cat_close);
 468
 469 /** Return the currently active log handle.  If the current log handle doesn't
 470  * have enough space left for the current record, start a new one.
 471  *
 472  * If reclen is 0, we only want to know what the currently active log is,
 473  * otherwise we get a lock on this log so nobody can steal our space.
 474  *
 475  * Assumes caller has already pushed us into the kernel context and is locking.
 476  *
 477  * NOTE: loghandle is write-locked upon successful return
 478  */
 479 static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle,
 480                                                 struct thandle *th)
 481 {
 482         struct llog_handle *loghandle = NULL;
 483         ENTRY;
 484
 485
 486         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED2)) {
 487                 down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 488                 GOTO(next, loghandle);
 489         }
 490
 491         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 492         loghandle = cathandle->u.chd.chd_current_log;
 493         if (loghandle) {
 494                 struct llog_log_hdr *llh;
 495
 496                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 497                 llh = loghandle->lgh_hdr;
 498                 if (llh == NULL || !llog_is_full(loghandle)) {
 499                         up_read(&cathandle->lgh_lock);
 500                         RETURN(loghandle);
 501                 } else {
 502                         up_write(&loghandle->lgh_lock);
 503                 }
 504         }
 505         up_read(&cathandle->lgh_lock);
 506
 507         /* time to use next log */
 508
 509         /* first, we have to make sure the state hasn't changed */
 510         down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 511         loghandle = cathandle->u.chd.chd_current_log;
 512         if (loghandle) {
 513                 struct llog_log_hdr *llh;
 514
 515                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 516                 llh = loghandle->lgh_hdr;
 517                 if (llh == NULL || !llog_is_full(loghandle))
 518                         GOTO(out_unlock, loghandle);
 519                 else
 520                         up_write(&loghandle->lgh_lock);
 521         }
 522
 523 next:
 524         /* Sigh, the chd_next_log and chd_current_log is initialized
 525          * in declare phase, and we do not serialize the catlog
 526          * accessing, so it might be possible the llog creation
 527          * thread (see llog_cat_declare_add_rec()) did not create
 528          * llog successfully, then the following thread might
 529          * meet this situation. */
 530         if (IS_ERR_OR_NULL(cathandle->u.chd.chd_next_log)) {
 531                 CERROR("%s: next log does not exist!\n",
 532                        loghandle2name(cathandle));
 533                 loghandle = ERR_PTR(-EIO);
 534                 if (cathandle->u.chd.chd_next_log == NULL) {
 535                         /* Store the error in chd_next_log, so
 536                          * the following process can get correct
 537                          * failure value */
 538                         cathandle->u.chd.chd_next_log = loghandle;
 539                 }
 540                 GOTO(out_unlock, loghandle);
 541         }
 542
 543         CDEBUG(D_INODE, "use next log\n");
 544
 545         loghandle = cathandle->u.chd.chd_next_log;
 546         cathandle->u.chd.chd_current_log = loghandle;
 547         cathandle->u.chd.chd_next_log = NULL;
 548         down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 549
 550 out_unlock:
 551         up_write(&cathandle->lgh_lock);
 552         LASSERT(loghandle);
 553         RETURN(loghandle);
 554 }
 555
 556 /* Add a single record to the recovery log(s) using a catalog
 557  * Returns as llog_write_record
 558  *
 559  * Assumes caller has already pushed us into the kernel context.
 560  */
 561 int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle,
 562                      struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
 563                      struct thandle *th)
 564 {
 565         struct llog_handle *loghandle;
 566         int rc, retried = 0;
 567         ENTRY;
 568
 569         LASSERT(rec->lrh_len <= cathandle->lgh_ctxt->loc_chunk_size);
 570
 571 retry:
 572         loghandle = llog_cat_current_log(cathandle, th);
 573         if (IS_ERR(loghandle))
 574                 RETURN(PTR_ERR(loghandle));
 575
 576         /* loghandle is already locked by llog_cat_current_log() for us */
 577         if (!llog_exist(loghandle)) {
 578                 rc = llog_cat_new_log(env, cathandle, loghandle, th);
 579                 if (rc < 0) {
 580                         up_write(&loghandle->lgh_lock);
 581                         /* nobody should be trying to use this llog */
 582                         down_write(&cathandle->lgh_lock);
 583                         if (cathandle->u.chd.chd_current_log == loghandle)
 584                                 cathandle->u.chd.chd_current_log = NULL;
 585                         up_write(&cathandle->lgh_lock);
 586                         RETURN(rc);
 587                 }
 588         }
 589         /* now let's try to add the record */
 590         rc = llog_write_rec(env, loghandle, rec, reccookie, LLOG_NEXT_IDX, th);
 591         if (rc < 0) {
 592                 CDEBUG_LIMIT(rc == -ENOSPC ? D_HA : D_ERROR,
 593                              "llog_write_rec %d: lh=%p\n", rc, loghandle);
 594                 /* -ENOSPC is returned if no empty records left
 595                  * and when it's lack of space on the stogage.
 596                  * there is no point to try again if it's the second
 597                  * case. many callers (like llog test) expect ENOSPC,
 598                  * so we preserve this error code, but look for the
 599                  * actual cause here */
 600                 if (rc == -ENOSPC && llog_is_full(loghandle))
 601                         rc = -ENOBUFS;
 602         }
 603         up_write(&loghandle->lgh_lock);
 604
 605         if (rc == -ENOBUFS) {
 606                 if (retried++ == 0)
 607                         GOTO(retry, rc);
 608                 CERROR("%s: error on 2nd llog: rc = %d\n",
 609                        loghandle2name(cathandle), rc);
 610         }
 611
 612         RETURN(rc);
 613 }
 614 EXPORT_SYMBOL(llog_cat_add_rec);
 615
 616 int llog_cat_declare_add_rec(const struct lu_env *env,
 617                              struct llog_handle *cathandle,
 618                              struct llog_rec_hdr *rec, struct thandle *th)
 619 {
 620         int rc;
 621
 622         ENTRY;
 623
 624 start:
 625         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 626         rc = llog_cat_prep_log(env, cathandle,
 627                                &cathandle->u.chd.chd_current_log, th);
 628         if (rc)
 629                 GOTO(unlock, rc);
 630
 631         rc = llog_cat_prep_log(env, cathandle, &cathandle->u.chd.chd_next_log,
 632                                th);
 633         if (rc)
 634                 GOTO(unlock, rc);
 635
 636         rc = llog_declare_write_rec(env, cathandle->u.chd.chd_current_log,
 637                                     rec, -1, th);
 638         if (rc == -ESTALE && dt_object_remote(cathandle->lgh_obj)) {
 639                 up_read(&cathandle->lgh_lock);
 640                 rc = llog_cat_refresh(env, cathandle);
 641                 if (rc)
 642                         RETURN(rc);
 643                 goto start;
 644         }
 645
 646 #if 0
 647         /*
 648          * XXX: we hope for declarations made for existing llog this might be
 649          * not correct with some backends where declarations are expected
 650          * against specific object like ZFS with full debugging enabled.
 651          */
 652         rc = llog_declare_write_rec(env, cathandle->u.chd.chd_next_log, rec, -1,
 653                                     th);
 654 #endif
 655 unlock:
 656         up_read(&cathandle->lgh_lock);
 657         RETURN(rc);
 658 }
 659 EXPORT_SYMBOL(llog_cat_declare_add_rec);
 660
 661 int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
 662                  struct llog_rec_hdr *rec, struct llog_cookie *reccookie)
 663 {
 664         struct llog_ctxt        *ctxt;
 665         struct dt_device        *dt;
 666         struct thandle          *th = NULL;
 667         int                      rc;
 668
 669         ctxt = cathandle->lgh_ctxt;
 670         LASSERT(ctxt);
 671         LASSERT(ctxt->loc_exp);
 672
 673         LASSERT(cathandle->lgh_obj != NULL);
 674         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 675
 676         th = dt_trans_create(env, dt);
 677         if (IS_ERR(th))
 678                 RETURN(PTR_ERR(th));
 679
 680         rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
 681         if (rc)
 682                 GOTO(out_trans, rc);
 683
 684         rc = dt_trans_start_local(env, dt, th);
 685         if (rc)
 686                 GOTO(out_trans, rc);
 687         rc = llog_cat_add_rec(env, cathandle, rec, reccookie, th);
 688 out_trans:
 689         dt_trans_stop(env, dt, th);
 690         RETURN(rc);
 691 }
 692 EXPORT_SYMBOL(llog_cat_add);
 693
 694 int llog_cat_cancel_arr_rec(const struct lu_env *env,
 695                             struct llog_handle *cathandle,
 696                             struct llog_logid *lgl, int count, int *index)
 697 {
 698         struct llog_handle *loghandle;
 699         int  rc;
 700
 701         ENTRY;
 702         rc = llog_cat_id2handle(env, cathandle, &loghandle, lgl);
 703         if (rc) {
 704                 CDEBUG(D_HA, "%s: can't find llog handle for "DFID": rc = %d\n",
 705                        loghandle2name(cathandle), PLOGID(lgl), rc);
 706                 RETURN(rc);
 707         }
 708
 709         if ((cathandle->lgh_ctxt->loc_flags &
 710              LLOG_CTXT_FLAG_NORMAL_FID) && !llog_exist(loghandle)) {
 711                 /* For update log, some of loghandles of cathandle
 712                  * might not exist because remote llog creation might
 713                  * be failed, so let's skip the record cancellation
 714                  * for these non-exist llogs.
 715                  */
 716                 rc = -ENOENT;
 717                 CDEBUG(D_HA, "%s: llog "DFID" does not exist: rc = %d\n",
 718                        loghandle2name(cathandle), PLOGID(lgl), rc);
 719                 llog_handle_put(env, loghandle);
 720                 RETURN(rc);
 721         }
 722
 723         rc = llog_cancel_arr_rec(env, loghandle, count, index);
 724         if (rc == LLOG_DEL_PLAIN) { /* log has been destroyed */
 725                 int cat_index;
 726
 727                 cat_index = loghandle->u.phd.phd_cookie.lgc_index;
 728                 rc = llog_cat_cleanup(env, cathandle, loghandle, cat_index);
 729                 if (rc)
 730                         CERROR("%s: fail to cancel catalog record: rc = %d\n",
 731                                loghandle2name(cathandle), rc);
 732                 rc = 0;
 733
 734         }
 735         llog_handle_put(env, loghandle);
 736
 737         if (rc)
 738                 CERROR("%s: fail to cancel %d llog-records: rc = %d\n",
 739                        loghandle2name(cathandle), count, rc);
 740
 741         RETURN(rc);
 742 }
 743 EXPORT_SYMBOL(llog_cat_cancel_arr_rec);
 744
 745 /* For each cookie in the cookie array, we clear the log in-use bit and either:
 746  * - the log is empty, so mark it free in the catalog header and delete it
 747  * - the log is not empty, just write out the log header
 748  *
 749  * The cookies may be in different log files, so we need to get new logs
 750  * each time.
 751  *
 752  * Assumes caller has already pushed us into the kernel context.
 753  */
 754 int llog_cat_cancel_records(const struct lu_env *env,
 755                             struct llog_handle *cathandle, int count,
 756                             struct llog_cookie *cookies)
 757 {
 758         int i, rc = 0, failed = 0;
 759
 760         ENTRY;
 761
 762         for (i = 0; i < count; i++, cookies++) {
 763                 int lrc;
 764
 765                 lrc = llog_cat_cancel_arr_rec(env, cathandle, &cookies->lgc_lgl,
 766                                              1, &cookies->lgc_index);
 767                 if (lrc) {
 768                         failed++;
 769                         if (!rc)
 770                                 rc = lrc;
 771                 }
 772         }
 773         if (failed)
 774                 CERROR("%s: fail to cancel %d of %d llog-records: rc = %d\n",
 775                        loghandle2name(cathandle), failed, count, rc);
 776         RETURN(rc);
 777 }
 778 EXPORT_SYMBOL(llog_cat_cancel_records);
 779
 780 static int llog_cat_process_common(const struct lu_env *env,
 781                                    struct llog_handle *cat_llh,
 782                                    struct llog_rec_hdr *rec,
 783                                    struct llog_handle **llhp)
 784 {
 785         struct llog_logid_rec *lir = container_of(rec, typeof(*lir), lid_hdr);
 786         struct llog_log_hdr *hdr;
 787         int rc;
 788
 789         ENTRY;
 790         if (rec->lrh_type != le32_to_cpu(LLOG_LOGID_MAGIC)) {
 791                 rc = -EINVAL;
 792                 CWARN("%s: invalid record in catalog "DFID": rc = %d\n",
 793                       loghandle2name(cat_llh), PLOGID(&cat_llh->lgh_id), rc);
 794                 RETURN(rc);
 795         }
 796         CDEBUG(D_HA, "processing log "DFID" at index %u of catalog "DFID"\n",
 797                PLOGID(&lir->lid_id), le32_to_cpu(rec->lrh_index),
 798                PLOGID(&cat_llh->lgh_id));
 799
 800         rc = llog_cat_id2handle(env, cat_llh, llhp, &lir->lid_id);
 801         if (rc) {
 802                 /* After a server crash, a stub of index record in catlog could
 803                  * be kept, because plain log destroy + catlog index record
 804                  * deletion are not atomic. So we end up with an index but no
 805                  * actual record. Destroy the index and move on. */
 806                 if (rc == -ENOENT || rc == -ESTALE)
 807                         rc = LLOG_DEL_RECORD;
 808                 else if (rc)
 809                         CWARN("%s: can't find llog handle "DFID": rc = %d\n",
 810                               loghandle2name(cat_llh), PLOGID(&lir->lid_id),
 811                               rc);
 812
 813                 RETURN(rc);
 814         }
 815
 816         /* clean old empty llogs, do not consider current llog in use */
 817         /* ignore remote (lgh_obj == NULL) llogs */
 818         hdr = (*llhp)->lgh_hdr;
 819         if ((hdr->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 820             hdr->llh_count == 1 && cat_llh->lgh_obj != NULL &&
 821             *llhp != cat_llh->u.chd.chd_current_log &&
 822             *llhp != cat_llh->u.chd.chd_next_log) {
 823                 rc = llog_destroy(env, *llhp);
 824                 if (rc)
 825                         CWARN("%s: can't destroy empty log "DFID": rc = %d\n",
 826                               loghandle2name((*llhp)), PLOGID(&lir->lid_id),
 827                               rc);
 828                 rc = LLOG_DEL_PLAIN;
 829         }
 830
 831         RETURN(rc);
 832 }
 833
 834 static int llog_cat_process_cb(const struct lu_env *env,
 835                                struct llog_handle *cat_llh,
 836                                struct llog_rec_hdr *rec, void *data)
 837 {
 838         struct llog_process_data *d = data;
 839         struct llog_handle *llh = NULL;
 840         int rc;
 841
 842         ENTRY;
 843         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 844         if (rc)
 845                 GOTO(out, rc);
 846
 847         if (rec->lrh_index < d->lpd_startcat) {
 848                 /* Skip processing of the logs until startcat */
 849                 rc = 0;
 850         } else if (d->lpd_startidx > 0) {
 851                 struct llog_process_cat_data cd;
 852
 853                 cd.lpcd_read_mode = LLOG_READ_MODE_NORMAL;
 854                 cd.lpcd_first_idx = d->lpd_startidx;
 855                 cd.lpcd_last_idx = 0;
 856                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 857                                           &cd, false);
 858                 /* Continue processing the next log from idx 0 */
 859                 d->lpd_startidx = 0;
 860         } else {
 861                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 862                                           NULL, false);
 863         }
 864         if (rc == -ENOENT && (cat_llh->lgh_hdr->llh_flags & LLOG_F_RM_ON_ERR)) {
 865                 /*
 866                  * plain llog is reported corrupted, so better to just remove
 867                  * it if the caller is fine with that.
 868                  */
 869                 CERROR("%s: remove corrupted/missing llog "DFID"\n",
 870                        loghandle2name(cat_llh), PLOGID(&llh->lgh_id));
 871                 rc = LLOG_DEL_PLAIN;
 872         }
 873
 874 out:
 875         /* The empty plain log was destroyed while processing */
 876         if (rc == LLOG_DEL_PLAIN || rc == LLOG_DEL_RECORD)
 877                 /* clear wrong catalog entry */
 878                 rc = llog_cat_cleanup(env, cat_llh, llh, rec->lrh_index);
 879         else if (rc == LLOG_SKIP_PLAIN)
 880                 /* processing callback ask to skip the llog -> continue */
 881                 rc = 0;
 882
 883         if (llh)
 884                 llog_handle_put(env, llh);
 885
 886         RETURN(rc);
 887 }
 888
 889 int llog_cat_process_or_fork(const struct lu_env *env,
 890                              struct llog_handle *cat_llh, llog_cb_t cat_cb,
 891                              llog_cb_t cb, void *data, int startcat,
 892                              int startidx, bool fork)
 893 {
 894         struct llog_process_data d;
 895         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
 896         int rc;
 897
 898         ENTRY;
 899
 900         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
 901         d.lpd_data = data;
 902         d.lpd_cb = cb;
 903         d.lpd_startcat = (startcat == LLOG_CAT_FIRST ? 0 : startcat);
 904         d.lpd_startidx = startidx;
 905
 906         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
 907             llh->llh_count > 1) {
 908                 struct llog_process_cat_data cd = {
 909                         .lpcd_read_mode = LLOG_READ_MODE_NORMAL
 910                 };
 911
 912                 CWARN("%s: catlog "DFID" crosses index zero\n",
 913                       loghandle2name(cat_llh), PLOGID(&cat_llh->lgh_id));
 914                 /*startcat = 0 is default value for general processing */
 915                 if ((startcat != LLOG_CAT_FIRST &&
 916                     startcat >= llh->llh_cat_idx) || !startcat) {
 917                         /* processing the catalog part at the end */
 918                         cd.lpcd_first_idx = (startcat ? startcat :
 919                                              llh->llh_cat_idx);
 920                         if (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS))
 921                                 cd.lpcd_last_idx = cfs_fail_val;
 922                         else
 923                                 cd.lpcd_last_idx = 0;
 924                         rc = llog_process_or_fork(env, cat_llh, cat_cb,
 925                                                   &d, &cd, fork);
 926                         /* Reset the startcat becasue it has already reached
 927                          * catalog bottom.
 928                          */
 929                         startcat = 0;
 930                         d.lpd_startcat = 0;
 931                         if (rc != 0)
 932                                 RETURN(rc);
 933                 }
 934                 /* processing the catalog part at the begining */
 935                 cd.lpcd_first_idx = (startcat == LLOG_CAT_FIRST) ? 0 : startcat;
 936                 /* Note, the processing will stop at the lgh_last_idx value,
 937                  * and it could be increased during processing. So records
 938                  * between current lgh_last_idx and lgh_last_idx in future
 939                  * would left unprocessed.
 940                  */
 941                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
 942                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 943                                           &d, &cd, fork);
 944         } else {
 945                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 946                                           &d, NULL, fork);
 947         }
 948
 949         RETURN(rc);
 950 }
 951 EXPORT_SYMBOL(llog_cat_process_or_fork);
 952
 953 int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
 954                      llog_cb_t cb, void *data, int startcat, int startidx)
 955 {
 956         return llog_cat_process_or_fork(env, cat_llh, llog_cat_process_cb,
 957                                         cb, data, startcat, startidx, false);
 958 }
 959 EXPORT_SYMBOL(llog_cat_process);
 960
 961 static int llog_cat_size_cb(const struct lu_env *env,
 962                              struct llog_handle *cat_llh,
 963                              struct llog_rec_hdr *rec, void *data)
 964 {
 965         struct llog_process_data *d = data;
 966         struct llog_handle *llh = NULL;
 967         __u64 *cum_size = d->lpd_data;
 968         __u64 size;
 969         int rc;
 970
 971         ENTRY;
 972         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 973
 974         if (rc == LLOG_DEL_PLAIN) {
 975                 /* empty log was deleted, don't count it */
 976                 rc = llog_cat_cleanup(env, cat_llh, llh,
 977                                       llh->u.phd.phd_cookie.lgc_index);
 978         } else if (rc == LLOG_DEL_RECORD) {
 979                 /* clear wrong catalog entry */
 980                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
 981         } else {
 982                 size = llog_size(env, llh);
 983                 *cum_size += size;
 984
 985                 CDEBUG(D_INFO, "Add llog entry "DFID" size=%llu, tot=%llu\n",
 986                        PLOGID(&llh->lgh_id), size, *cum_size);
 987         }
 988
 989         if (llh != NULL)
 990                 llog_handle_put(env, llh);
 991
 992         RETURN(0);
 993 }
 994
 995 __u64 llog_cat_size(const struct lu_env *env, struct llog_handle *cat_llh)
 996 {
 997         __u64 size = llog_size(env, cat_llh);
 998
 999         llog_cat_process_or_fork(env, cat_llh, llog_cat_size_cb,
1000                                  NULL, &size, 0, 0, false);
1001
1002         return size;
1003 }
1004 EXPORT_SYMBOL(llog_cat_size);
1005
1006 /* currently returns the number of "free" entries in catalog,
1007  * ie the available entries for a new plain LLOG file creation,
1008  * even if catalog has wrapped
1009  */
1010 __u32 llog_cat_free_space(struct llog_handle *cat_llh)
1011 {
1012         /* simulate almost full Catalog */
1013         if (OBD_FAIL_CHECK(OBD_FAIL_CAT_FREE_RECORDS))
1014                 return cfs_fail_val;
1015
1016         if (cat_llh->lgh_hdr->llh_count == 1)
1017                 return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1;
1018
1019         if (cat_llh->lgh_last_idx > cat_llh->lgh_hdr->llh_cat_idx)
1020                 return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1 +
1021                        cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
1022
1023         /* catalog is presently wrapped */
1024         return cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
1025 }
1026 EXPORT_SYMBOL(llog_cat_free_space);
1027
1028 static int llog_cat_reverse_process_cb(const struct lu_env *env,
1029                                        struct llog_handle *cat_llh,
1030                                        struct llog_rec_hdr *rec, void *data)
1031 {
1032         struct llog_process_data *d = data;
1033         struct llog_handle *llh;
1034         int rc;
1035
1036         ENTRY;
1037         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
1038
1039         /* The empty plain log was destroyed while processing */
1040         if (rc == LLOG_DEL_PLAIN) {
1041                 rc = llog_cat_cleanup(env, cat_llh, llh,
1042                                       llh->u.phd.phd_cookie.lgc_index);
1043         } else if (rc == LLOG_DEL_RECORD) {
1044                 /* clear wrong catalog entry */
1045                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
1046         } else if (rc == LLOG_SKIP_PLAIN) {
1047                 /* processing callback ask to skip the llog -> continue */
1048                 rc = 0;
1049         }
1050         if (rc)
1051                 RETURN(rc);
1052
1053         rc = llog_reverse_process(env, llh, d->lpd_cb, d->lpd_data, NULL);
1054
1055         /* The empty plain was destroyed while processing */
1056         if (rc == LLOG_DEL_PLAIN)
1057                 rc = llog_cat_cleanup(env, cat_llh, llh,
1058                                       llh->u.phd.phd_cookie.lgc_index);
1059
1060         llog_handle_put(env, llh);
1061         RETURN(rc);
1062 }
1063
1064 int llog_cat_reverse_process(const struct lu_env *env,
1065                              struct llog_handle *cat_llh,
1066                              llog_cb_t cb, void *data)
1067 {
1068         struct llog_process_data d;
1069         struct llog_process_cat_data cd;
1070         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
1071         int rc;
1072         ENTRY;
1073
1074         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
1075         cd.lpcd_read_mode = LLOG_READ_MODE_NORMAL;
1076         d.lpd_data = data;
1077         d.lpd_cb = cb;
1078
1079         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
1080             llh->llh_count > 1) {
1081                 CWARN("%s: catalog "DFID" crosses index zero\n",
1082                       loghandle2name(cat_llh),
1083                       PLOGID(&cat_llh->lgh_id));
1084
1085                 cd.lpcd_first_idx = 0;
1086                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
1087                 rc = llog_reverse_process(env, cat_llh,
1088                                           llog_cat_reverse_process_cb,
1089                                           &d, &cd);
1090                 if (rc != 0)
1091                         RETURN(rc);
1092
1093                 cd.lpcd_first_idx = le32_to_cpu(llh->llh_cat_idx);
1094                 cd.lpcd_last_idx = 0;
1095                 rc = llog_reverse_process(env, cat_llh,
1096                                           llog_cat_reverse_process_cb,
1097                                           &d, &cd);
1098         } else {
1099                 rc = llog_reverse_process(env, cat_llh,
1100                                           llog_cat_reverse_process_cb,
1101                                           &d, NULL);
1102         }
1103
1104         RETURN(rc);
1105 }
1106 EXPORT_SYMBOL(llog_cat_reverse_process);
1107
1108 static int llog_cat_set_first_idx(struct llog_handle *cathandle, int idx)
1109 {
1110         struct llog_log_hdr *llh = cathandle->lgh_hdr;
1111         int bitmap_size;
1112
1113         ENTRY;
1114
1115         bitmap_size = LLOG_HDR_BITMAP_SIZE(llh);
1116         /*
1117          * The llh_cat_idx equals to the first used index minus 1
1118          * so if we canceled the first index then llh_cat_idx
1119          * must be renewed.
1120          */
1121         if (llh->llh_cat_idx == (idx - 1)) {
1122                 llh->llh_cat_idx = idx;
1123
1124                 while (idx != cathandle->lgh_last_idx) {
1125                         idx = (idx + 1) % bitmap_size;
1126                         if (!test_bit_le(idx, LLOG_HDR_BITMAP(llh))) {
1127                                 /* update llh_cat_idx for each unset bit,
1128                                  * expecting the next one is set */
1129                                 llh->llh_cat_idx = idx;
1130                         } else if (idx == 0) {
1131                                 /* skip header bit */
1132                                 llh->llh_cat_idx = 0;
1133                                 continue;
1134                         } else {
1135                                 /* the first index is found */
1136                                 break;
1137                         }
1138                 }
1139
1140                 CDEBUG(D_HA, "catlog "DFID" first idx %u, last_idx %u\n",
1141                        PLOGID(&cathandle->lgh_id), llh->llh_cat_idx,
1142                        cathandle->lgh_last_idx);
1143         }
1144
1145         RETURN(0);
1146 }
1147
1148 /* Cleanup deleted plain llog traces from catalog */
1149 int llog_cat_cleanup(const struct lu_env *env, struct llog_handle *cathandle,
1150                      struct llog_handle *loghandle, int index)
1151 {
1152         int rc;
1153
1154         LASSERT(index);
1155         if (loghandle != NULL) {
1156                 /* remove destroyed llog from catalog list and
1157                  * chd_current_log variable */
1158                 down_write(&cathandle->lgh_lock);
1159                 if (cathandle->u.chd.chd_current_log == loghandle)
1160                         cathandle->u.chd.chd_current_log = NULL;
1161                 list_del_init(&loghandle->u.phd.phd_entry);
1162                 up_write(&cathandle->lgh_lock);
1163                 LASSERT(index == loghandle->u.phd.phd_cookie.lgc_index ||
1164                         loghandle->u.phd.phd_cookie.lgc_index == 0);
1165                 /* llog was opened and keep in a list, close it now */
1166                 llog_close(env, loghandle);
1167         }
1168
1169         /* do not attempt to cleanup on-disk llog if on client side */
1170         if (cathandle->lgh_obj == NULL)
1171                 return 0;
1172
1173         /* remove plain llog entry from catalog by index */
1174         llog_cat_set_first_idx(cathandle, index);
1175         rc = llog_cancel_rec(env, cathandle, index);
1176         if (!rc && loghandle)
1177                 CDEBUG(D_HA,
1178                        "cancel plain log "DFID" at index %u of catalog "DFID"\n",
1179                        PLOGID(&loghandle->lgh_id), index,
1180                        PLOGID(&cathandle->lgh_id));
1181         return rc;
1182 }