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  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/obdclass/llog_cat.c
  33  *
  34  * OST<->MDS recovery logging infrastructure.
  35  *
  36  * Invariants in implementation:
  37  * - we do not share logs among different OST<->MDS connections, so that
  38  *   if an OST or MDS fails it need only look at log(s) relevant to itself
  39  *
  40  * Author: Andreas Dilger <adilger@clusterfs.com>
  41  * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
  42  * Author: Mikhail Pershin <mike.pershin@intel.com>
  43  */
  44
  45 #define DEBUG_SUBSYSTEM S_LOG
  46
  47
  48 #include <obd_class.h>
  49
  50 #include "llog_internal.h"
  51
  52
  53 /**
  54  * lockdep markers for nested struct llog_handle::lgh_lock locking.
  55  */
  56 enum {
  57         LLOGH_CAT,
  58         LLOGH_LOG,
  59 };
  60
  61 /* Create a new log handle and add it to the open list.
  62  * This log handle will be closed when all of the records in it are removed.
  63  *
  64  * Assumes caller has already pushed us into the kernel context and is locking.
  65  */
  66 static int llog_cat_new_log(const struct lu_env *env,
  67                             struct llog_handle *cathandle,
  68                             struct llog_handle *loghandle,
  69                             struct thandle *th)
  70 {
  71         struct llog_thread_info *lgi = llog_info(env);
  72         struct llog_logid_rec   *rec = &lgi->lgi_logid;
  73         struct thandle *handle = NULL;
  74         struct dt_device *dt = NULL;
  75         struct llog_log_hdr     *llh = cathandle->lgh_hdr;
  76         int                      rc, index;
  77
  78         ENTRY;
  79
  80         index = (cathandle->lgh_last_idx + 1) %
  81                 (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS) ? (cfs_fail_val + 1) :
  82                                                 LLOG_HDR_BITMAP_SIZE(llh));
  83
  84         /* check that new llog index will not overlap with the first one.
  85          * - llh_cat_idx is the index just before the first/oldest still in-use
  86          *      index in catalog
  87          * - lgh_last_idx is the last/newest used index in catalog
  88          *
  89          * When catalog is not wrapped yet then lgh_last_idx is always larger
  90          * than llh_cat_idx. After the wrap around lgh_last_idx re-starts
  91          * from 0 and llh_cat_idx becomes the upper limit for it
  92          *
  93          * Check if catalog has already wrapped around or not by comparing
  94          * last_idx and cat_idx */
  95         if ((index == llh->llh_cat_idx + 1 && llh->llh_count > 1) ||
  96             (index == 0 && llh->llh_cat_idx == 0)) {
  97                 if (cathandle->lgh_name == NULL) {
  98                         CWARN("%s: there are no more free slots in catalog "
  99                               DFID":%x\n",
 100                               loghandle->lgh_ctxt->loc_obd->obd_name,
 101                               PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
 102                               cathandle->lgh_id.lgl_ogen);
 103                 } else {
 104                         CWARN("%s: there are no more free slots in "
 105                               "catalog %s\n",
 106                               loghandle->lgh_ctxt->loc_obd->obd_name,
 107                               cathandle->lgh_name);
 108                 }
 109                 RETURN(-ENOSPC);
 110         }
 111
 112         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED))
 113                 RETURN(-ENOSPC);
 114
 115         if (loghandle->lgh_hdr != NULL) {
 116                 /* If llog object is remote and creation is failed, lgh_hdr
 117                  * might be left over here, free it first */
 118                 LASSERT(!llog_exist(loghandle));
 119                 OBD_FREE_LARGE(loghandle->lgh_hdr, loghandle->lgh_hdr_size);
 120                 loghandle->lgh_hdr = NULL;
 121         }
 122
 123         if (th == NULL) {
 124                 dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 125
 126                 handle = dt_trans_create(env, dt);
 127                 if (IS_ERR(handle))
 128                         RETURN(PTR_ERR(handle));
 129
 130                 /* Create update llog object synchronously, which
 131                  * happens during inialization process see
 132                  * lod_sub_prep_llog(), to make sure the update
 133                  * llog object is created before corss-MDT writing
 134                  * updates into the llog object */
 135                 if (cathandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID)
 136                         handle->th_sync = 1;
 137
 138                 handle->th_wait_submit = 1;
 139
 140                 rc = llog_declare_create(env, loghandle, handle);
 141                 if (rc != 0)
 142                         GOTO(out, rc);
 143
 144                 rec->lid_hdr.lrh_len = sizeof(*rec);
 145                 rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 146                 rec->lid_id = loghandle->lgh_id;
 147                 rc = llog_declare_write_rec(env, cathandle, &rec->lid_hdr, -1,
 148                                             handle);
 149                 if (rc != 0)
 150                         GOTO(out, rc);
 151
 152                 rc = dt_trans_start_local(env, dt, handle);
 153                 if (rc != 0)
 154                         GOTO(out, rc);
 155
 156                 th = handle;
 157         }
 158
 159         rc = llog_create(env, loghandle, th);
 160         /* if llog is already created, no need to initialize it */
 161         if (rc == -EEXIST) {
 162                 GOTO(out, rc = 0);
 163         } else if (rc != 0) {
 164                 CERROR("%s: can't create new plain llog in catalog: rc = %d\n",
 165                        loghandle->lgh_ctxt->loc_obd->obd_name, rc);
 166                 GOTO(out, rc);
 167         }
 168
 169         rc = llog_init_handle(env, loghandle,
 170                               LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
 171                               &cathandle->lgh_hdr->llh_tgtuuid);
 172         if (rc < 0)
 173                 GOTO(out, rc);
 174
 175         /* build the record for this log in the catalog */
 176         rec->lid_hdr.lrh_len = sizeof(*rec);
 177         rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 178         rec->lid_id = loghandle->lgh_id;
 179
 180         /* append the new record into catalog. The new index will be
 181          * assigned to the record and updated in rec header */
 182         rc = llog_write_rec(env, cathandle, &rec->lid_hdr,
 183                             &loghandle->u.phd.phd_cookie, LLOG_NEXT_IDX, th);
 184         if (rc < 0)
 185                 GOTO(out_destroy, rc);
 186
 187         CDEBUG(D_OTHER, "new plain log "DFID".%u of catalog "DFID"\n",
 188                PFID(&loghandle->lgh_id.lgl_oi.oi_fid), rec->lid_hdr.lrh_index,
 189                PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
 190
 191         loghandle->lgh_hdr->llh_cat_idx = rec->lid_hdr.lrh_index;
 192
 193         /* limit max size of plain llog so that space can be
 194          * released sooner, especially on small filesystems */
 195         /* 2MB for the cases when free space hasn't been learned yet */
 196         loghandle->lgh_max_size = 2 << 20;
 197         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 198         rc = dt_statfs(env, dt, &lgi->lgi_statfs);
 199         if (rc == 0 && lgi->lgi_statfs.os_bfree > 0) {
 200                 __u64 freespace = (lgi->lgi_statfs.os_bfree *
 201                                   lgi->lgi_statfs.os_bsize) >> 6;
 202                 if (freespace < loghandle->lgh_max_size)
 203                         loghandle->lgh_max_size = freespace;
 204                 /* shouldn't be > 128MB in any case?
 205                  * it's 256K records of 512 bytes each */
 206                 if (freespace > (128 << 20))
 207                         loghandle->lgh_max_size = 128 << 20;
 208         }
 209         rc = 0;
 210
 211 out:
 212         if (handle != NULL) {
 213                 handle->th_result = rc >= 0 ? 0 : rc;
 214                 dt_trans_stop(env, dt, handle);
 215         }
 216         RETURN(rc);
 217
 218 out_destroy:
 219         /* to signal llog_cat_close() it shouldn't try to destroy the llog,
 220          * we want to destroy it in this transaction, otherwise the object
 221          * becomes an orphan */
 222         loghandle->lgh_hdr->llh_flags &= ~LLOG_F_ZAP_WHEN_EMPTY;
 223         /* this is to mimic full log, so another llog_cat_current_log()
 224          * can skip it and ask for another onet */
 225         loghandle->lgh_last_idx = LLOG_HDR_BITMAP_SIZE(loghandle->lgh_hdr) + 1;
 226         llog_trans_destroy(env, loghandle, th);
 227         if (handle != NULL)
 228                 dt_trans_stop(env, dt, handle);
 229         RETURN(rc);
 230 }
 231
 232 static int llog_cat_refresh(const struct lu_env *env,
 233                             struct llog_handle *cathandle)
 234 {
 235         struct llog_handle *loghandle;
 236         int rc;
 237
 238         down_write(&cathandle->lgh_lock);
 239         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 240                             u.phd.phd_entry) {
 241                 if (!llog_exist(loghandle))
 242                         continue;
 243
 244                 rc = llog_read_header(env, loghandle, NULL);
 245                 if (rc)
 246                         goto unlock;
 247         }
 248
 249         rc = llog_read_header(env, cathandle, NULL);
 250 unlock:
 251         up_write(&loghandle->lgh_lock);
 252
 253         return rc;
 254 }
 255
 256 /*
 257  * prepare current/next log for catalog.
 258  *
 259  * if \a *ploghandle is NULL, open it, and declare create, NB, if \a
 260  * *ploghandle is remote, create it synchronously here, see comments
 261  * below.
 262  *
 263  * \a cathandle->lgh_lock is down_read-ed, it gets down_write-ed if \a
 264  * *ploghandle has to be opened.
 265  */
 266 static int llog_cat_prep_log(const struct lu_env *env,
 267                              struct llog_handle *cathandle,
 268                              struct llog_handle **ploghandle,
 269                              struct thandle *th)
 270 {
 271         int rc;
 272         int sem_upgraded;
 273
 274 start:
 275         rc = 0;
 276         sem_upgraded = 0;
 277         if (IS_ERR_OR_NULL(*ploghandle)) {
 278                 up_read(&cathandle->lgh_lock);
 279                 down_write(&cathandle->lgh_lock);
 280                 sem_upgraded = 1;
 281                 if (IS_ERR_OR_NULL(*ploghandle)) {
 282                         struct llog_handle *loghandle;
 283
 284                         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle,
 285                                        NULL, NULL, LLOG_OPEN_NEW);
 286                         if (!rc) {
 287                                 *ploghandle = loghandle;
 288                                 list_add_tail(&loghandle->u.phd.phd_entry,
 289                                               &cathandle->u.chd.chd_head);
 290                         }
 291                 }
 292                 if (rc)
 293                         GOTO(out, rc);
 294         }
 295
 296         rc = llog_exist(*ploghandle);
 297         if (rc < 0)
 298                 GOTO(out, rc);
 299         if (rc)
 300                 GOTO(out, rc = 0);
 301
 302         if (dt_object_remote(cathandle->lgh_obj)) {
 303                 down_write_nested(&(*ploghandle)->lgh_lock, LLOGH_LOG);
 304                 if (!llog_exist(*ploghandle)) {
 305                         /* For remote operation, if we put the llog object
 306                          * creation in the current transaction, then the
 307                          * llog object will not be created on the remote
 308                          * target until the transaction stop, if other
 309                          * operations start before the transaction stop,
 310                          * and use the same llog object, will be dependent
 311                          * on the success of this transaction. So let's
 312                          * create the llog object synchronously here to
 313                          * remove the dependency. */
 314                         rc = llog_cat_new_log(env, cathandle, *ploghandle,
 315                                               NULL);
 316                         if (rc == -ESTALE) {
 317                                 up_write(&(*ploghandle)->lgh_lock);
 318                                 if (sem_upgraded)
 319                                         up_write(&cathandle->lgh_lock);
 320                                 else
 321                                         up_read(&cathandle->lgh_lock);
 322
 323                                 rc = llog_cat_refresh(env, cathandle);
 324                                 down_read_nested(&cathandle->lgh_lock,
 325                                                  LLOGH_CAT);
 326                                 if (rc)
 327                                         return rc;
 328                                 /* *ploghandle might become NULL, restart */
 329                                 goto start;
 330                         }
 331                 }
 332                 up_write(&(*ploghandle)->lgh_lock);
 333         } else {
 334                 struct llog_thread_info *lgi = llog_info(env);
 335                 struct llog_logid_rec *lirec = &lgi->lgi_logid;
 336
 337                 rc = llog_declare_create(env, *ploghandle, th);
 338                 if (rc)
 339                         GOTO(out, rc);
 340
 341                 lirec->lid_hdr.lrh_len = sizeof(*lirec);
 342                 rc = llog_declare_write_rec(env, cathandle, &lirec->lid_hdr, -1,
 343                                             th);
 344         }
 345
 346 out:
 347         if (sem_upgraded) {
 348                 up_write(&cathandle->lgh_lock);
 349                 down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 350                 if (rc == 0)
 351                         goto start;
 352         }
 353         return rc;
 354 }
 355
 356 /* Open an existent log handle and add it to the open list.
 357  * This log handle will be closed when all of the records in it are removed.
 358  *
 359  * Assumes caller has already pushed us into the kernel context and is locking.
 360  * We return a lock on the handle to ensure nobody yanks it from us.
 361  *
 362  * This takes extra reference on llog_handle via llog_handle_get() and require
 363  * this reference to be put by caller using llog_handle_put()
 364  */
 365 int llog_cat_id2handle(const struct lu_env *env, struct llog_handle *cathandle,
 366                        struct llog_handle **res, struct llog_logid *logid)
 367 {
 368         struct llog_handle      *loghandle;
 369         enum llog_flag           fmt;
 370         int                      rc = 0;
 371
 372         ENTRY;
 373
 374         if (cathandle == NULL)
 375                 RETURN(-EBADF);
 376
 377         fmt = cathandle->lgh_hdr->llh_flags & LLOG_F_EXT_MASK;
 378         down_write(&cathandle->lgh_lock);
 379         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 380                             u.phd.phd_entry) {
 381                 struct llog_logid *cgl = &loghandle->lgh_id;
 382
 383                 if (ostid_id(&cgl->lgl_oi) == ostid_id(&logid->lgl_oi) &&
 384                     ostid_seq(&cgl->lgl_oi) == ostid_seq(&logid->lgl_oi)) {
 385                         if (cgl->lgl_ogen != logid->lgl_ogen) {
 386                                 CWARN("%s: log "DFID" generation %x != %x\n",
 387                                       loghandle->lgh_ctxt->loc_obd->obd_name,
 388                                       PFID(&logid->lgl_oi.oi_fid),
 389                                       cgl->lgl_ogen, logid->lgl_ogen);
 390                                 continue;
 391                         }
 392                         loghandle->u.phd.phd_cat_handle = cathandle;
 393                         up_write(&cathandle->lgh_lock);
 394                         GOTO(out, rc = 0);
 395                 }
 396         }
 397         up_write(&cathandle->lgh_lock);
 398
 399         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle, logid, NULL,
 400                        LLOG_OPEN_EXISTS);
 401         if (rc < 0) {
 402                 CERROR("%s: error opening log id "DFID":%x: rc = %d\n",
 403                        cathandle->lgh_ctxt->loc_obd->obd_name,
 404                        PFID(&logid->lgl_oi.oi_fid), logid->lgl_ogen, rc);
 405                 RETURN(rc);
 406         }
 407
 408         rc = llog_init_handle(env, loghandle, LLOG_F_IS_PLAIN | fmt, NULL);
 409         if (rc < 0) {
 410                 llog_close(env, loghandle);
 411                 loghandle = NULL;
 412                 RETURN(rc);
 413         }
 414
 415         down_write(&cathandle->lgh_lock);
 416         list_add_tail(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head);
 417         up_write(&cathandle->lgh_lock);
 418
 419         loghandle->u.phd.phd_cat_handle = cathandle;
 420         loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id;
 421         loghandle->u.phd.phd_cookie.lgc_index =
 422                                 loghandle->lgh_hdr->llh_cat_idx;
 423         EXIT;
 424 out:
 425         llog_handle_get(loghandle);
 426         *res = loghandle;
 427         return 0;
 428 }
 429
 430 int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle)
 431 {
 432         struct llog_handle      *loghandle, *n;
 433         int                      rc;
 434
 435         ENTRY;
 436
 437         list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
 438                                  u.phd.phd_entry) {
 439                 struct llog_log_hdr     *llh = loghandle->lgh_hdr;
 440                 int                      index;
 441
 442                 /* unlink open-not-created llogs */
 443                 list_del_init(&loghandle->u.phd.phd_entry);
 444                 llh = loghandle->lgh_hdr;
 445                 if (loghandle->lgh_obj != NULL && llh != NULL &&
 446                     (llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 447                     (llh->llh_count == 1)) {
 448                         rc = llog_destroy(env, loghandle);
 449                         if (rc)
 450                                 CERROR("%s: failure destroying log during "
 451                                        "cleanup: rc = %d\n",
 452                                        loghandle->lgh_ctxt->loc_obd->obd_name,
 453                                        rc);
 454
 455                         index = loghandle->u.phd.phd_cookie.lgc_index;
 456                         llog_cat_cleanup(env, cathandle, NULL, index);
 457                 }
 458                 llog_close(env, loghandle);
 459         }
 460         /* if handle was stored in ctxt, remove it too */
 461         if (cathandle->lgh_ctxt->loc_handle == cathandle)
 462                 cathandle->lgh_ctxt->loc_handle = NULL;
 463         rc = llog_close(env, cathandle);
 464         RETURN(rc);
 465 }
 466 EXPORT_SYMBOL(llog_cat_close);
 467
 468 /** Return the currently active log handle.  If the current log handle doesn't
 469  * have enough space left for the current record, start a new one.
 470  *
 471  * If reclen is 0, we only want to know what the currently active log is,
 472  * otherwise we get a lock on this log so nobody can steal our space.
 473  *
 474  * Assumes caller has already pushed us into the kernel context and is locking.
 475  *
 476  * NOTE: loghandle is write-locked upon successful return
 477  */
 478 static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle,
 479                                                 struct thandle *th)
 480 {
 481         struct llog_handle *loghandle = NULL;
 482         ENTRY;
 483
 484
 485         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED2)) {
 486                 down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 487                 GOTO(next, loghandle);
 488         }
 489
 490         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 491         loghandle = cathandle->u.chd.chd_current_log;
 492         if (loghandle) {
 493                 struct llog_log_hdr *llh;
 494
 495                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 496                 llh = loghandle->lgh_hdr;
 497                 if (llh == NULL || !llog_is_full(loghandle)) {
 498                         up_read(&cathandle->lgh_lock);
 499                         RETURN(loghandle);
 500                 } else {
 501                         up_write(&loghandle->lgh_lock);
 502                 }
 503         }
 504         up_read(&cathandle->lgh_lock);
 505
 506         /* time to use next log */
 507
 508         /* first, we have to make sure the state hasn't changed */
 509         down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 510         loghandle = cathandle->u.chd.chd_current_log;
 511         if (loghandle) {
 512                 struct llog_log_hdr *llh;
 513
 514                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 515                 llh = loghandle->lgh_hdr;
 516                 if (llh == NULL || !llog_is_full(loghandle))
 517                         GOTO(out_unlock, loghandle);
 518                 else
 519                         up_write(&loghandle->lgh_lock);
 520         }
 521
 522 next:
 523         /* Sigh, the chd_next_log and chd_current_log is initialized
 524          * in declare phase, and we do not serialize the catlog
 525          * accessing, so it might be possible the llog creation
 526          * thread (see llog_cat_declare_add_rec()) did not create
 527          * llog successfully, then the following thread might
 528          * meet this situation. */
 529         if (IS_ERR_OR_NULL(cathandle->u.chd.chd_next_log)) {
 530                 CERROR("%s: next log does not exist!\n",
 531                        cathandle->lgh_ctxt->loc_obd->obd_name);
 532                 loghandle = ERR_PTR(-EIO);
 533                 if (cathandle->u.chd.chd_next_log == NULL) {
 534                         /* Store the error in chd_next_log, so
 535                          * the following process can get correct
 536                          * failure value */
 537                         cathandle->u.chd.chd_next_log = loghandle;
 538                 }
 539                 GOTO(out_unlock, loghandle);
 540         }
 541
 542         CDEBUG(D_INODE, "use next log\n");
 543
 544         loghandle = cathandle->u.chd.chd_next_log;
 545         cathandle->u.chd.chd_current_log = loghandle;
 546         cathandle->u.chd.chd_next_log = NULL;
 547         down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 548
 549 out_unlock:
 550         up_write(&cathandle->lgh_lock);
 551         LASSERT(loghandle);
 552         RETURN(loghandle);
 553 }
 554
 555 /* Add a single record to the recovery log(s) using a catalog
 556  * Returns as llog_write_record
 557  *
 558  * Assumes caller has already pushed us into the kernel context.
 559  */
 560 int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle,
 561                      struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
 562                      struct thandle *th)
 563 {
 564         struct llog_handle *loghandle;
 565         int rc, retried = 0;
 566         ENTRY;
 567
 568         LASSERT(rec->lrh_len <= cathandle->lgh_ctxt->loc_chunk_size);
 569
 570 retry:
 571         loghandle = llog_cat_current_log(cathandle, th);
 572         if (IS_ERR(loghandle))
 573                 RETURN(PTR_ERR(loghandle));
 574
 575         /* loghandle is already locked by llog_cat_current_log() for us */
 576         if (!llog_exist(loghandle)) {
 577                 rc = llog_cat_new_log(env, cathandle, loghandle, th);
 578                 if (rc < 0) {
 579                         up_write(&loghandle->lgh_lock);
 580                         /* nobody should be trying to use this llog */
 581                         down_write(&cathandle->lgh_lock);
 582                         if (cathandle->u.chd.chd_current_log == loghandle)
 583                                 cathandle->u.chd.chd_current_log = NULL;
 584                         up_write(&cathandle->lgh_lock);
 585                         RETURN(rc);
 586                 }
 587         }
 588         /* now let's try to add the record */
 589         rc = llog_write_rec(env, loghandle, rec, reccookie, LLOG_NEXT_IDX, th);
 590         if (rc < 0) {
 591                 CDEBUG_LIMIT(rc == -ENOSPC ? D_HA : D_ERROR,
 592                              "llog_write_rec %d: lh=%p\n", rc, loghandle);
 593                 /* -ENOSPC is returned if no empty records left
 594                  * and when it's lack of space on the stogage.
 595                  * there is no point to try again if it's the second
 596                  * case. many callers (like llog test) expect ENOSPC,
 597                  * so we preserve this error code, but look for the
 598                  * actual cause here */
 599                 if (rc == -ENOSPC && llog_is_full(loghandle))
 600                         rc = -ENOBUFS;
 601         }
 602         up_write(&loghandle->lgh_lock);
 603
 604         if (rc == -ENOBUFS) {
 605                 if (retried++ == 0)
 606                         GOTO(retry, rc);
 607                 CERROR("%s: error on 2nd llog: rc = %d\n",
 608                        cathandle->lgh_ctxt->loc_obd->obd_name, rc);
 609         }
 610
 611         RETURN(rc);
 612 }
 613 EXPORT_SYMBOL(llog_cat_add_rec);
 614
 615 int llog_cat_declare_add_rec(const struct lu_env *env,
 616                              struct llog_handle *cathandle,
 617                              struct llog_rec_hdr *rec, struct thandle *th)
 618 {
 619         int rc;
 620
 621         ENTRY;
 622
 623 start:
 624         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 625         rc = llog_cat_prep_log(env, cathandle,
 626                                &cathandle->u.chd.chd_current_log, th);
 627         if (rc)
 628                 GOTO(unlock, rc);
 629
 630         rc = llog_cat_prep_log(env, cathandle, &cathandle->u.chd.chd_next_log,
 631                                th);
 632         if (rc)
 633                 GOTO(unlock, rc);
 634
 635         rc = llog_declare_write_rec(env, cathandle->u.chd.chd_current_log,
 636                                     rec, -1, th);
 637         if (rc == -ESTALE && dt_object_remote(cathandle->lgh_obj)) {
 638                 up_read(&cathandle->lgh_lock);
 639                 rc = llog_cat_refresh(env, cathandle);
 640                 if (rc)
 641                         RETURN(rc);
 642                 goto start;
 643         }
 644
 645 #if 0
 646         /*
 647          * XXX: we hope for declarations made for existing llog this might be
 648          * not correct with some backends where declarations are expected
 649          * against specific object like ZFS with full debugging enabled.
 650          */
 651         rc = llog_declare_write_rec(env, cathandle->u.chd.chd_next_log, rec, -1,
 652                                     th);
 653 #endif
 654 unlock:
 655         up_read(&cathandle->lgh_lock);
 656         RETURN(rc);
 657 }
 658 EXPORT_SYMBOL(llog_cat_declare_add_rec);
 659
 660 int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
 661                  struct llog_rec_hdr *rec, struct llog_cookie *reccookie)
 662 {
 663         struct llog_ctxt        *ctxt;
 664         struct dt_device        *dt;
 665         struct thandle          *th = NULL;
 666         int                      rc;
 667
 668         ctxt = cathandle->lgh_ctxt;
 669         LASSERT(ctxt);
 670         LASSERT(ctxt->loc_exp);
 671
 672         LASSERT(cathandle->lgh_obj != NULL);
 673         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 674
 675         th = dt_trans_create(env, dt);
 676         if (IS_ERR(th))
 677                 RETURN(PTR_ERR(th));
 678
 679         rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
 680         if (rc)
 681                 GOTO(out_trans, rc);
 682
 683         rc = dt_trans_start_local(env, dt, th);
 684         if (rc)
 685                 GOTO(out_trans, rc);
 686         rc = llog_cat_add_rec(env, cathandle, rec, reccookie, th);
 687 out_trans:
 688         dt_trans_stop(env, dt, th);
 689         RETURN(rc);
 690 }
 691 EXPORT_SYMBOL(llog_cat_add);
 692
 693 int llog_cat_cancel_arr_rec(const struct lu_env *env,
 694                             struct llog_handle *cathandle,
 695                             struct llog_logid *lgl, int count, int *index)
 696 {
 697         struct llog_handle *loghandle;
 698         int  rc;
 699
 700         ENTRY;
 701         rc = llog_cat_id2handle(env, cathandle, &loghandle, lgl);
 702         if (rc) {
 703                 CDEBUG(D_HA, "%s: cannot find llog for handle "DFID":%x"
 704                        ": rc = %d\n",
 705                        cathandle->lgh_ctxt->loc_obd->obd_name,
 706                        PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, rc);
 707                 RETURN(rc);
 708         }
 709
 710         if ((cathandle->lgh_ctxt->loc_flags &
 711              LLOG_CTXT_FLAG_NORMAL_FID) && !llog_exist(loghandle)) {
 712                 /* For update log, some of loghandles of cathandle
 713                  * might not exist because remote llog creation might
 714                  * be failed, so let's skip the record cancellation
 715                  * for these non-exist llogs.
 716                  */
 717                 rc = -ENOENT;
 718                 CDEBUG(D_HA, "%s: llog "DFID":%x does not exist"
 719                        ": rc = %d\n",
 720                        cathandle->lgh_ctxt->loc_obd->obd_name,
 721                        PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, rc);
 722
 723                 llog_handle_put(loghandle);
 724                 RETURN(rc);
 725         }
 726
 727         rc = llog_cancel_arr_rec(env, loghandle, count, index);
 728         if (rc == LLOG_DEL_PLAIN) { /* log has been destroyed */
 729                 int cat_index;
 730
 731                 cat_index = loghandle->u.phd.phd_cookie.lgc_index;
 732                 rc = llog_cat_cleanup(env, cathandle, loghandle, cat_index);
 733                 if (rc)
 734                         CERROR("%s: fail to cancel catalog record: rc = %d\n",
 735                                cathandle->lgh_ctxt->loc_obd->obd_name, rc);
 736                 rc = 0;
 737
 738         }
 739         llog_handle_put(loghandle);
 740
 741         if (rc)
 742                 CERROR("%s: fail to cancel %d llog-records: rc = %d\n",
 743                        cathandle->lgh_ctxt->loc_obd->obd_name, count,
 744                        rc);
 745
 746         RETURN(rc);
 747 }
 748 EXPORT_SYMBOL(llog_cat_cancel_arr_rec);
 749
 750 /* For each cookie in the cookie array, we clear the log in-use bit and either:
 751  * - the log is empty, so mark it free in the catalog header and delete it
 752  * - the log is not empty, just write out the log header
 753  *
 754  * The cookies may be in different log files, so we need to get new logs
 755  * each time.
 756  *
 757  * Assumes caller has already pushed us into the kernel context.
 758  */
 759 int llog_cat_cancel_records(const struct lu_env *env,
 760                             struct llog_handle *cathandle, int count,
 761                             struct llog_cookie *cookies)
 762 {
 763         int i, rc = 0, failed = 0;
 764
 765         ENTRY;
 766
 767         for (i = 0; i < count; i++, cookies++) {
 768                 int lrc;
 769
 770                 lrc = llog_cat_cancel_arr_rec(env, cathandle, &cookies->lgc_lgl,
 771                                              1, &cookies->lgc_index);
 772                 if (lrc) {
 773                         failed++;
 774                         if (!rc)
 775                                 rc = lrc;
 776                 }
 777         }
 778         if (failed)
 779                 CERROR("%s: fail to cancel %d of %d llog-records: rc = %d\n",
 780                        cathandle->lgh_ctxt->loc_obd->obd_name, failed, count,
 781                        rc);
 782         RETURN(rc);
 783 }
 784 EXPORT_SYMBOL(llog_cat_cancel_records);
 785
 786 static int llog_cat_process_common(const struct lu_env *env,
 787                                    struct llog_handle *cat_llh,
 788                                    struct llog_rec_hdr *rec,
 789                                    struct llog_handle **llhp)
 790 {
 791         struct llog_logid_rec *lir = container_of(rec, typeof(*lir), lid_hdr);
 792         struct llog_log_hdr *hdr;
 793         int rc;
 794
 795         ENTRY;
 796         if (rec->lrh_type != le32_to_cpu(LLOG_LOGID_MAGIC)) {
 797                 rc = -EINVAL;
 798                 CWARN("%s: invalid record in catalog "DFID":%x: rc = %d\n",
 799                       cat_llh->lgh_ctxt->loc_obd->obd_name,
 800                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid),
 801                       cat_llh->lgh_id.lgl_ogen, rc);
 802                 RETURN(rc);
 803         }
 804         CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "DFID"\n",
 805                PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
 806                le32_to_cpu(rec->lrh_index),
 807                PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 808
 809         rc = llog_cat_id2handle(env, cat_llh, llhp, &lir->lid_id);
 810         if (rc) {
 811                 /* After a server crash, a stub of index record in catlog could
 812                  * be kept, because plain log destroy + catlog index record
 813                  * deletion are not atomic. So we end up with an index but no
 814                  * actual record. Destroy the index and move on. */
 815                 if (rc == -ENOENT || rc == -ESTALE)
 816                         rc = LLOG_DEL_RECORD;
 817                 else if (rc)
 818                         CWARN("%s: can't find llog handle "DFID":%x: rc = %d\n",
 819                               cat_llh->lgh_ctxt->loc_obd->obd_name,
 820                               PFID(&lir->lid_id.lgl_oi.oi_fid),
 821                               lir->lid_id.lgl_ogen, rc);
 822
 823                 RETURN(rc);
 824         }
 825
 826         /* clean old empty llogs, do not consider current llog in use */
 827         /* ignore remote (lgh_obj == NULL) llogs */
 828         hdr = (*llhp)->lgh_hdr;
 829         if ((hdr->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 830             hdr->llh_count == 1 && cat_llh->lgh_obj != NULL &&
 831             *llhp != cat_llh->u.chd.chd_current_log) {
 832                 rc = llog_destroy(env, *llhp);
 833                 if (rc)
 834                         CWARN("%s: can't destroy empty log "DFID": rc = %d\n",
 835                               (*llhp)->lgh_ctxt->loc_obd->obd_name,
 836                               PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
 837                 rc = LLOG_DEL_PLAIN;
 838         }
 839
 840         RETURN(rc);
 841 }
 842
 843 static int llog_cat_process_cb(const struct lu_env *env,
 844                                struct llog_handle *cat_llh,
 845                                struct llog_rec_hdr *rec, void *data)
 846 {
 847         struct llog_process_data *d = data;
 848         struct llog_handle *llh = NULL;
 849         int rc;
 850
 851         ENTRY;
 852         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 853         if (rc)
 854                 GOTO(out, rc);
 855
 856         if (rec->lrh_index < d->lpd_startcat) {
 857                 /* Skip processing of the logs until startcat */
 858                 rc = 0;
 859         } else if (d->lpd_startidx > 0) {
 860                 struct llog_process_cat_data cd;
 861
 862                 cd.lpcd_first_idx = d->lpd_startidx;
 863                 cd.lpcd_last_idx = 0;
 864                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 865                                           &cd, false);
 866                 /* Continue processing the next log from idx 0 */
 867                 d->lpd_startidx = 0;
 868         } else {
 869                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 870                                           NULL, false);
 871         }
 872
 873 out:
 874         /* The empty plain log was destroyed while processing */
 875         if (rc == LLOG_DEL_PLAIN) {
 876                 rc = llog_cat_cleanup(env, cat_llh, llh,
 877                                       llh->u.phd.phd_cookie.lgc_index);
 878         } else if (rc == LLOG_DEL_RECORD) {
 879                 /* clear wrong catalog entry */
 880                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
 881         }
 882
 883         if (llh)
 884                 llog_handle_put(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
 910                 CWARN("%s: catlog "DFID" crosses index zero\n",
 911                       cat_llh->lgh_ctxt->loc_obd->obd_name,
 912                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 913                 /*startcat = 0 is default value for general processing */
 914                 if ((startcat != LLOG_CAT_FIRST &&
 915                     startcat >= llh->llh_cat_idx) || !startcat) {
 916                         /* processing the catalog part at the end */
 917                         cd.lpcd_first_idx = (startcat ? startcat :
 918                                              llh->llh_cat_idx);
 919                         if (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS))
 920                                 cd.lpcd_last_idx = cfs_fail_val;
 921                         else
 922                                 cd.lpcd_last_idx = 0;
 923                         rc = llog_process_or_fork(env, cat_llh, cat_cb,
 924                                                   &d, &cd, fork);
 925                         /* Reset the startcat becasue it has already reached
 926                          * catalog bottom.
 927                          */
 928                         startcat = 0;
 929                         if (rc != 0)
 930                                 RETURN(rc);
 931                 }
 932                 /* processing the catalog part at the begining */
 933                 cd.lpcd_first_idx = (startcat == LLOG_CAT_FIRST) ? 0 : startcat;
 934                 /* Note, the processing will stop at the lgh_last_idx value,
 935                  * and it could be increased during processing. So records
 936                  * between current lgh_last_idx and lgh_last_idx in future
 937                  * would left unprocessed.
 938                  */
 939                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
 940                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 941                                           &d, &cd, fork);
 942         } else {
 943                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 944                                           &d, NULL, fork);
 945         }
 946
 947         RETURN(rc);
 948 }
 949 EXPORT_SYMBOL(llog_cat_process_or_fork);
 950
 951 int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
 952                      llog_cb_t cb, void *data, int startcat, int startidx)
 953 {
 954         return llog_cat_process_or_fork(env, cat_llh, llog_cat_process_cb,
 955                                         cb, data, startcat, startidx, false);
 956 }
 957 EXPORT_SYMBOL(llog_cat_process);
 958
 959 static int llog_cat_size_cb(const struct lu_env *env,
 960                              struct llog_handle *cat_llh,
 961                              struct llog_rec_hdr *rec, void *data)
 962 {
 963         struct llog_process_data *d = data;
 964         struct llog_handle *llh = NULL;
 965         __u64 *cum_size = d->lpd_data;
 966         __u64 size;
 967         int rc;
 968
 969         ENTRY;
 970         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 971
 972         if (rc == LLOG_DEL_PLAIN) {
 973                 /* empty log was deleted, don't count it */
 974                 rc = llog_cat_cleanup(env, cat_llh, llh,
 975                                       llh->u.phd.phd_cookie.lgc_index);
 976         } else if (rc == LLOG_DEL_RECORD) {
 977                 /* clear wrong catalog entry */
 978                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
 979         } else {
 980                 size = llog_size(env, llh);
 981                 *cum_size += size;
 982
 983                 CDEBUG(D_INFO, "Add llog entry "DFID" size=%llu, tot=%llu\n",
 984                        PFID(&llh->lgh_id.lgl_oi.oi_fid), size, *cum_size);
 985         }
 986
 987         if (llh != NULL)
 988                 llog_handle_put(llh);
 989
 990         RETURN(0);
 991 }
 992
 993 __u64 llog_cat_size(const struct lu_env *env, struct llog_handle *cat_llh)
 994 {
 995         __u64 size = llog_size(env, cat_llh);
 996
 997         llog_cat_process_or_fork(env, cat_llh, llog_cat_size_cb,
 998                                  NULL, &size, 0, 0, false);
 999
1000         return size;
1001 }
1002 EXPORT_SYMBOL(llog_cat_size);
1003
1004 /* currently returns the number of "free" entries in catalog,
1005  * ie the available entries for a new plain LLOG file creation,
1006  * even if catalog has wrapped
1007  */
1008 __u32 llog_cat_free_space(struct llog_handle *cat_llh)
1009 {
1010         /* simulate almost full Catalog */
1011         if (OBD_FAIL_CHECK(OBD_FAIL_CAT_FREE_RECORDS))
1012                 return cfs_fail_val;
1013
1014         if (cat_llh->lgh_hdr->llh_count == 1)
1015                 return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1;
1016
1017         if (cat_llh->lgh_last_idx > cat_llh->lgh_hdr->llh_cat_idx)
1018                 return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1 +
1019                        cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
1020
1021         /* catalog is presently wrapped */
1022         return cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
1023 }
1024 EXPORT_SYMBOL(llog_cat_free_space);
1025
1026 static int llog_cat_reverse_process_cb(const struct lu_env *env,
1027                                        struct llog_handle *cat_llh,
1028                                        struct llog_rec_hdr *rec, void *data)
1029 {
1030         struct llog_process_data *d = data;
1031         struct llog_handle *llh;
1032         int rc;
1033
1034         ENTRY;
1035         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
1036
1037         /* The empty plain log was destroyed while processing */
1038         if (rc == LLOG_DEL_PLAIN) {
1039                 rc = llog_cat_cleanup(env, cat_llh, llh,
1040                                       llh->u.phd.phd_cookie.lgc_index);
1041         } else if (rc == LLOG_DEL_RECORD) {
1042                 /* clear wrong catalog entry */
1043                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
1044         }
1045         if (rc)
1046                 RETURN(rc);
1047
1048         rc = llog_reverse_process(env, llh, d->lpd_cb, d->lpd_data, NULL);
1049
1050         /* The empty plain was destroyed while processing */
1051         if (rc == LLOG_DEL_PLAIN)
1052                 rc = llog_cat_cleanup(env, cat_llh, llh,
1053                                       llh->u.phd.phd_cookie.lgc_index);
1054
1055         llog_handle_put(llh);
1056         RETURN(rc);
1057 }
1058
1059 int llog_cat_reverse_process(const struct lu_env *env,
1060                              struct llog_handle *cat_llh,
1061                              llog_cb_t cb, void *data)
1062 {
1063         struct llog_process_data d;
1064         struct llog_process_cat_data cd;
1065         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
1066         int rc;
1067         ENTRY;
1068
1069         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
1070         d.lpd_data = data;
1071         d.lpd_cb = cb;
1072
1073         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
1074             llh->llh_count > 1) {
1075                 CWARN("%s: catalog "DFID" crosses index zero\n",
1076                       cat_llh->lgh_ctxt->loc_obd->obd_name,
1077                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
1078
1079                 cd.lpcd_first_idx = 0;
1080                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
1081                 rc = llog_reverse_process(env, cat_llh,
1082                                           llog_cat_reverse_process_cb,
1083                                           &d, &cd);
1084                 if (rc != 0)
1085                         RETURN(rc);
1086
1087                 cd.lpcd_first_idx = le32_to_cpu(llh->llh_cat_idx);
1088                 cd.lpcd_last_idx = 0;
1089                 rc = llog_reverse_process(env, cat_llh,
1090                                           llog_cat_reverse_process_cb,
1091                                           &d, &cd);
1092         } else {
1093                 rc = llog_reverse_process(env, cat_llh,
1094                                           llog_cat_reverse_process_cb,
1095                                           &d, NULL);
1096         }
1097
1098         RETURN(rc);
1099 }
1100 EXPORT_SYMBOL(llog_cat_reverse_process);
1101
1102 static int llog_cat_set_first_idx(struct llog_handle *cathandle, int idx)
1103 {
1104         struct llog_log_hdr *llh = cathandle->lgh_hdr;
1105         int bitmap_size;
1106
1107         ENTRY;
1108
1109         bitmap_size = LLOG_HDR_BITMAP_SIZE(llh);
1110         /*
1111          * The llh_cat_idx equals to the first used index minus 1
1112          * so if we canceled the first index then llh_cat_idx
1113          * must be renewed.
1114          */
1115         if (llh->llh_cat_idx == (idx - 1)) {
1116                 llh->llh_cat_idx = idx;
1117
1118                 while (idx != cathandle->lgh_last_idx) {
1119                         idx = (idx + 1) % bitmap_size;
1120                         if (!ext2_test_bit(idx, LLOG_HDR_BITMAP(llh))) {
1121                                 /* update llh_cat_idx for each unset bit,
1122                                  * expecting the next one is set */
1123                                 llh->llh_cat_idx = idx;
1124                         } else if (idx == 0) {
1125                                 /* skip header bit */
1126                                 llh->llh_cat_idx = 0;
1127                                 continue;
1128                         } else {
1129                                 /* the first index is found */
1130                                 break;
1131                         }
1132                 }
1133
1134                 CDEBUG(D_RPCTRACE, "catlog "DFID" first idx %u, last_idx %u\n",
1135                        PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
1136                        llh->llh_cat_idx, cathandle->lgh_last_idx);
1137         }
1138
1139         RETURN(0);
1140 }
1141
1142 /* Cleanup deleted plain llog traces from catalog */
1143 int llog_cat_cleanup(const struct lu_env *env, struct llog_handle *cathandle,
1144                      struct llog_handle *loghandle, int index)
1145 {
1146         int rc;
1147
1148         LASSERT(index);
1149         if (loghandle != NULL) {
1150                 /* remove destroyed llog from catalog list and
1151                  * chd_current_log variable */
1152                 down_write(&cathandle->lgh_lock);
1153                 if (cathandle->u.chd.chd_current_log == loghandle)
1154                         cathandle->u.chd.chd_current_log = NULL;
1155                 list_del_init(&loghandle->u.phd.phd_entry);
1156                 up_write(&cathandle->lgh_lock);
1157                 LASSERT(index == loghandle->u.phd.phd_cookie.lgc_index);
1158                 /* llog was opened and keep in a list, close it now */
1159                 llog_close(env, loghandle);
1160         }
1161
1162         /* do not attempt to cleanup on-disk llog if on client side */
1163         if (cathandle->lgh_obj == NULL)
1164                 return 0;
1165
1166         /* remove plain llog entry from catalog by index */
1167         llog_cat_set_first_idx(cathandle, index);
1168         rc = llog_cancel_rec(env, cathandle, index);
1169         if (rc == 0)
1170                 CDEBUG(D_HA, "cancel plain log at index %u of catalog "DFID"\n",
1171                        index, PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
1172         return rc;
1173 }