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 /* Create a new log handle and add it to the open list.
  53  * This log handle will be closed when all of the records in it are removed.
  54  *
  55  * Assumes caller has already pushed us into the kernel context and is locking.
  56  */
  57 static int llog_cat_new_log(const struct lu_env *env,
  58                             struct llog_handle *cathandle,
  59                             struct llog_handle *loghandle,
  60                             struct thandle *th)
  61 {
  62         struct llog_thread_info *lgi = llog_info(env);
  63         struct llog_logid_rec   *rec = &lgi->lgi_logid;
  64         struct thandle *handle = NULL;
  65         struct dt_device *dt = NULL;
  66         struct llog_log_hdr     *llh = cathandle->lgh_hdr;
  67         int                      rc, index;
  68
  69         ENTRY;
  70
  71         index = (cathandle->lgh_last_idx + 1) %
  72                 (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS) ? (cfs_fail_val + 1) :
  73                                                 LLOG_HDR_BITMAP_SIZE(llh));
  74
  75         /* check that new llog index will not overlap with the first one.
  76          * - llh_cat_idx is the index just before the first/oldest still in-use
  77          *      index in catalog
  78          * - lgh_last_idx is the last/newest used index in catalog
  79          *
  80          * When catalog is not wrapped yet then lgh_last_idx is always larger
  81          * than llh_cat_idx. After the wrap around lgh_last_idx re-starts
  82          * from 0 and llh_cat_idx becomes the upper limit for it
  83          *
  84          * Check if catalog has already wrapped around or not by comparing
  85          * last_idx and cat_idx */
  86         if ((index == llh->llh_cat_idx + 1 && llh->llh_count > 1) ||
  87             (index == 0 && llh->llh_cat_idx == 0)) {
  88                 if (cathandle->lgh_name == NULL) {
  89                         CWARN("%s: there are no more free slots in catalog "
  90                               DFID":%x\n",
  91                               loghandle->lgh_ctxt->loc_obd->obd_name,
  92                               PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
  93                               cathandle->lgh_id.lgl_ogen);
  94                 } else {
  95                         CWARN("%s: there are no more free slots in "
  96                               "catalog %s\n",
  97                               loghandle->lgh_ctxt->loc_obd->obd_name,
  98                               cathandle->lgh_name);
  99                 }
 100                 RETURN(-ENOSPC);
 101         }
 102
 103         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED))
 104                 RETURN(-ENOSPC);
 105
 106         if (loghandle->lgh_hdr != NULL) {
 107                 /* If llog object is remote and creation is failed, lgh_hdr
 108                  * might be left over here, free it first */
 109                 LASSERT(!llog_exist(loghandle));
 110                 OBD_FREE_LARGE(loghandle->lgh_hdr, loghandle->lgh_hdr_size);
 111                 loghandle->lgh_hdr = NULL;
 112         }
 113
 114         if (th == NULL) {
 115                 dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 116
 117                 handle = dt_trans_create(env, dt);
 118                 if (IS_ERR(handle))
 119                         RETURN(PTR_ERR(handle));
 120
 121                 /* Create update llog object synchronously, which
 122                  * happens during inialization process see
 123                  * lod_sub_prep_llog(), to make sure the update
 124                  * llog object is created before corss-MDT writing
 125                  * updates into the llog object */
 126                 if (cathandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID)
 127                         handle->th_sync = 1;
 128
 129                 handle->th_wait_submit = 1;
 130
 131                 rc = llog_declare_create(env, loghandle, handle);
 132                 if (rc != 0)
 133                         GOTO(out, rc);
 134
 135                 rec->lid_hdr.lrh_len = sizeof(*rec);
 136                 rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 137                 rec->lid_id = loghandle->lgh_id;
 138                 rc = llog_declare_write_rec(env, cathandle, &rec->lid_hdr, -1,
 139                                             handle);
 140                 if (rc != 0)
 141                         GOTO(out, rc);
 142
 143                 rc = dt_trans_start_local(env, dt, handle);
 144                 if (rc != 0)
 145                         GOTO(out, rc);
 146
 147                 th = handle;
 148         }
 149
 150         rc = llog_create(env, loghandle, th);
 151         /* if llog is already created, no need to initialize it */
 152         if (rc == -EEXIST) {
 153                 GOTO(out, rc = 0);
 154         } else if (rc != 0) {
 155                 CERROR("%s: can't create new plain llog in catalog: rc = %d\n",
 156                        loghandle->lgh_ctxt->loc_obd->obd_name, rc);
 157                 GOTO(out, rc);
 158         }
 159
 160         rc = llog_init_handle(env, loghandle,
 161                               LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
 162                               &cathandle->lgh_hdr->llh_tgtuuid);
 163         if (rc < 0)
 164                 GOTO(out, rc);
 165
 166         /* build the record for this log in the catalog */
 167         rec->lid_hdr.lrh_len = sizeof(*rec);
 168         rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 169         rec->lid_id = loghandle->lgh_id;
 170
 171         /* append the new record into catalog. The new index will be
 172          * assigned to the record and updated in rec header */
 173         rc = llog_write_rec(env, cathandle, &rec->lid_hdr,
 174                             &loghandle->u.phd.phd_cookie, LLOG_NEXT_IDX, th);
 175         if (rc < 0)
 176                 GOTO(out_destroy, rc);
 177
 178         CDEBUG(D_OTHER, "new plain log "DFID".%u of catalog "DFID"\n",
 179                PFID(&loghandle->lgh_id.lgl_oi.oi_fid), rec->lid_hdr.lrh_index,
 180                PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
 181
 182         loghandle->lgh_hdr->llh_cat_idx = rec->lid_hdr.lrh_index;
 183
 184         /* limit max size of plain llog so that space can be
 185          * released sooner, especially on small filesystems */
 186         /* 2MB for the cases when free space hasn't been learned yet */
 187         loghandle->lgh_max_size = 2 << 20;
 188         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 189         rc = dt_statfs(env, dt, &lgi->lgi_statfs);
 190         if (rc == 0 && lgi->lgi_statfs.os_bfree > 0) {
 191                 __u64 freespace = (lgi->lgi_statfs.os_bfree *
 192                                   lgi->lgi_statfs.os_bsize) >> 6;
 193                 if (freespace < loghandle->lgh_max_size)
 194                         loghandle->lgh_max_size = freespace;
 195                 /* shouldn't be > 128MB in any case?
 196                  * it's 256K records of 512 bytes each */
 197                 if (freespace > (128 << 20))
 198                         loghandle->lgh_max_size = 128 << 20;
 199         }
 200         rc = 0;
 201
 202 out:
 203         if (handle != NULL) {
 204                 handle->th_result = rc >= 0 ? 0 : rc;
 205                 dt_trans_stop(env, dt, handle);
 206         }
 207         RETURN(rc);
 208
 209 out_destroy:
 210         /* to signal llog_cat_close() it shouldn't try to destroy the llog,
 211          * we want to destroy it in this transaction, otherwise the object
 212          * becomes an orphan */
 213         loghandle->lgh_hdr->llh_flags &= ~LLOG_F_ZAP_WHEN_EMPTY;
 214         /* this is to mimic full log, so another llog_cat_current_log()
 215          * can skip it and ask for another onet */
 216         loghandle->lgh_last_idx = LLOG_HDR_BITMAP_SIZE(loghandle->lgh_hdr) + 1;
 217         llog_trans_destroy(env, loghandle, th);
 218         if (handle != NULL)
 219                 dt_trans_stop(env, dt, handle);
 220         RETURN(rc);
 221 }
 222
 223 /* Open an existent log handle and add it to the open list.
 224  * This log handle will be closed when all of the records in it are removed.
 225  *
 226  * Assumes caller has already pushed us into the kernel context and is locking.
 227  * We return a lock on the handle to ensure nobody yanks it from us.
 228  *
 229  * This takes extra reference on llog_handle via llog_handle_get() and require
 230  * this reference to be put by caller using llog_handle_put()
 231  */
 232 int llog_cat_id2handle(const struct lu_env *env, struct llog_handle *cathandle,
 233                        struct llog_handle **res, struct llog_logid *logid)
 234 {
 235         struct llog_handle      *loghandle;
 236         enum llog_flag           fmt;
 237         int                      rc = 0;
 238
 239         ENTRY;
 240
 241         if (cathandle == NULL)
 242                 RETURN(-EBADF);
 243
 244         fmt = cathandle->lgh_hdr->llh_flags & LLOG_F_EXT_MASK;
 245         down_write(&cathandle->lgh_lock);
 246         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 247                             u.phd.phd_entry) {
 248                 struct llog_logid *cgl = &loghandle->lgh_id;
 249
 250                 if (ostid_id(&cgl->lgl_oi) == ostid_id(&logid->lgl_oi) &&
 251                     ostid_seq(&cgl->lgl_oi) == ostid_seq(&logid->lgl_oi)) {
 252                         if (cgl->lgl_ogen != logid->lgl_ogen) {
 253                                 CWARN("%s: log "DFID" generation %x != %x\n",
 254                                       loghandle->lgh_ctxt->loc_obd->obd_name,
 255                                       PFID(&logid->lgl_oi.oi_fid),
 256                                       cgl->lgl_ogen, logid->lgl_ogen);
 257                                 continue;
 258                         }
 259                         loghandle->u.phd.phd_cat_handle = cathandle;
 260                         up_write(&cathandle->lgh_lock);
 261                         GOTO(out, rc = 0);
 262                 }
 263         }
 264         up_write(&cathandle->lgh_lock);
 265
 266         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle, logid, NULL,
 267                        LLOG_OPEN_EXISTS);
 268         if (rc < 0) {
 269                 CERROR("%s: error opening log id "DFID":%x: rc = %d\n",
 270                        cathandle->lgh_ctxt->loc_obd->obd_name,
 271                        PFID(&logid->lgl_oi.oi_fid), logid->lgl_ogen, rc);
 272                 RETURN(rc);
 273         }
 274
 275         rc = llog_init_handle(env, loghandle, LLOG_F_IS_PLAIN | fmt, NULL);
 276         if (rc < 0) {
 277                 llog_close(env, loghandle);
 278                 loghandle = NULL;
 279                 RETURN(rc);
 280         }
 281
 282         down_write(&cathandle->lgh_lock);
 283         list_add_tail(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head);
 284         up_write(&cathandle->lgh_lock);
 285
 286         loghandle->u.phd.phd_cat_handle = cathandle;
 287         loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id;
 288         loghandle->u.phd.phd_cookie.lgc_index =
 289                                 loghandle->lgh_hdr->llh_cat_idx;
 290         EXIT;
 291 out:
 292         llog_handle_get(loghandle);
 293         *res = loghandle;
 294         return 0;
 295 }
 296
 297 int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle)
 298 {
 299         struct llog_handle      *loghandle, *n;
 300         int                      rc;
 301
 302         ENTRY;
 303
 304         list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
 305                                  u.phd.phd_entry) {
 306                 struct llog_log_hdr     *llh = loghandle->lgh_hdr;
 307                 int                      index;
 308
 309                 /* unlink open-not-created llogs */
 310                 list_del_init(&loghandle->u.phd.phd_entry);
 311                 llh = loghandle->lgh_hdr;
 312                 if (loghandle->lgh_obj != NULL && llh != NULL &&
 313                     (llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 314                     (llh->llh_count == 1)) {
 315                         rc = llog_destroy(env, loghandle);
 316                         if (rc)
 317                                 CERROR("%s: failure destroying log during "
 318                                        "cleanup: rc = %d\n",
 319                                        loghandle->lgh_ctxt->loc_obd->obd_name,
 320                                        rc);
 321
 322                         index = loghandle->u.phd.phd_cookie.lgc_index;
 323                         llog_cat_cleanup(env, cathandle, NULL, index);
 324                 }
 325                 llog_close(env, loghandle);
 326         }
 327         /* if handle was stored in ctxt, remove it too */
 328         if (cathandle->lgh_ctxt->loc_handle == cathandle)
 329                 cathandle->lgh_ctxt->loc_handle = NULL;
 330         rc = llog_close(env, cathandle);
 331         RETURN(rc);
 332 }
 333 EXPORT_SYMBOL(llog_cat_close);
 334
 335 /**
 336  * lockdep markers for nested struct llog_handle::lgh_lock locking.
 337  */
 338 enum {
 339         LLOGH_CAT,
 340         LLOGH_LOG
 341 };
 342
 343 /** Return the currently active log handle.  If the current log handle doesn't
 344  * have enough space left for the current record, start a new one.
 345  *
 346  * If reclen is 0, we only want to know what the currently active log is,
 347  * otherwise we get a lock on this log so nobody can steal our space.
 348  *
 349  * Assumes caller has already pushed us into the kernel context and is locking.
 350  *
 351  * NOTE: loghandle is write-locked upon successful return
 352  */
 353 static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle,
 354                                                 struct thandle *th)
 355 {
 356         struct llog_handle *loghandle = NULL;
 357         ENTRY;
 358
 359
 360         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED2)) {
 361                 down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 362                 GOTO(next, loghandle);
 363         }
 364
 365         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 366         loghandle = cathandle->u.chd.chd_current_log;
 367         if (loghandle) {
 368                 struct llog_log_hdr *llh;
 369
 370                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 371                 llh = loghandle->lgh_hdr;
 372                 if (llh == NULL || !llog_is_full(loghandle)) {
 373                         up_read(&cathandle->lgh_lock);
 374                         RETURN(loghandle);
 375                 } else {
 376                         up_write(&loghandle->lgh_lock);
 377                 }
 378         }
 379         up_read(&cathandle->lgh_lock);
 380
 381         /* time to use next log */
 382
 383         /* first, we have to make sure the state hasn't changed */
 384         down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 385         loghandle = cathandle->u.chd.chd_current_log;
 386         if (loghandle) {
 387                 struct llog_log_hdr *llh;
 388
 389                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 390                 llh = loghandle->lgh_hdr;
 391                 if (llh == NULL || !llog_is_full(loghandle))
 392                         GOTO(out_unlock, loghandle);
 393                 else
 394                         up_write(&loghandle->lgh_lock);
 395         }
 396
 397 next:
 398         /* Sigh, the chd_next_log and chd_current_log is initialized
 399          * in declare phase, and we do not serialize the catlog
 400          * accessing, so it might be possible the llog creation
 401          * thread (see llog_cat_declare_add_rec()) did not create
 402          * llog successfully, then the following thread might
 403          * meet this situation. */
 404         if (IS_ERR_OR_NULL(cathandle->u.chd.chd_next_log)) {
 405                 CERROR("%s: next log does not exist!\n",
 406                        cathandle->lgh_ctxt->loc_obd->obd_name);
 407                 loghandle = ERR_PTR(-EIO);
 408                 if (cathandle->u.chd.chd_next_log == NULL) {
 409                         /* Store the error in chd_next_log, so
 410                          * the following process can get correct
 411                          * failure value */
 412                         cathandle->u.chd.chd_next_log = loghandle;
 413                 }
 414                 GOTO(out_unlock, loghandle);
 415         }
 416
 417         CDEBUG(D_INODE, "use next log\n");
 418
 419         loghandle = cathandle->u.chd.chd_next_log;
 420         cathandle->u.chd.chd_current_log = loghandle;
 421         cathandle->u.chd.chd_next_log = NULL;
 422         down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 423
 424 out_unlock:
 425         up_write(&cathandle->lgh_lock);
 426         LASSERT(loghandle);
 427         RETURN(loghandle);
 428 }
 429
 430 static int llog_cat_update_header(const struct lu_env *env,
 431                            struct llog_handle *cathandle)
 432 {
 433         struct llog_handle *loghandle;
 434         int rc;
 435         ENTRY;
 436
 437         /* refresh llog */
 438         down_write(&cathandle->lgh_lock);
 439         if (!cathandle->lgh_stale) {
 440                 up_write(&cathandle->lgh_lock);
 441                 RETURN(0);
 442         }
 443         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 444                             u.phd.phd_entry) {
 445                 if (!llog_exist(loghandle))
 446                         continue;
 447
 448                 rc = llog_read_header(env, loghandle, NULL);
 449                 if (rc != 0) {
 450                         up_write(&cathandle->lgh_lock);
 451                         GOTO(out, rc);
 452                 }
 453         }
 454         rc = llog_read_header(env, cathandle, NULL);
 455         if (rc == 0)
 456                 cathandle->lgh_stale = 0;
 457         up_write(&cathandle->lgh_lock);
 458         if (rc != 0)
 459                 GOTO(out, rc);
 460 out:
 461         RETURN(rc);
 462 }
 463
 464 /* Add a single record to the recovery log(s) using a catalog
 465  * Returns as llog_write_record
 466  *
 467  * Assumes caller has already pushed us into the kernel context.
 468  */
 469 int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle,
 470                      struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
 471                      struct thandle *th)
 472 {
 473         struct llog_handle *loghandle;
 474         int rc, retried = 0;
 475         ENTRY;
 476
 477         LASSERT(rec->lrh_len <= cathandle->lgh_ctxt->loc_chunk_size);
 478
 479 retry:
 480         loghandle = llog_cat_current_log(cathandle, th);
 481         if (IS_ERR(loghandle))
 482                 RETURN(PTR_ERR(loghandle));
 483
 484         /* loghandle is already locked by llog_cat_current_log() for us */
 485         if (!llog_exist(loghandle)) {
 486                 rc = llog_cat_new_log(env, cathandle, loghandle, th);
 487                 if (rc < 0) {
 488                         up_write(&loghandle->lgh_lock);
 489                         /* nobody should be trying to use this llog */
 490                         down_write(&cathandle->lgh_lock);
 491                         /* only reset current log if still room in catalog, to
 492                          * avoid unnecessarily and racy creation of new and
 493                          * partially initialized llog_handle
 494                          */
 495                         if ((cathandle->u.chd.chd_current_log == loghandle) &&
 496                             rc != -ENOSPC)
 497                                 cathandle->u.chd.chd_current_log = NULL;
 498                         up_write(&cathandle->lgh_lock);
 499                         RETURN(rc);
 500                 }
 501         }
 502         /* now let's try to add the record */
 503         rc = llog_write_rec(env, loghandle, rec, reccookie, LLOG_NEXT_IDX, th);
 504         if (rc < 0) {
 505                 CDEBUG_LIMIT(rc == -ENOSPC ? D_HA : D_ERROR,
 506                              "llog_write_rec %d: lh=%p\n", rc, loghandle);
 507                 /* -ENOSPC is returned if no empty records left
 508                  * and when it's lack of space on the stogage.
 509                  * there is no point to try again if it's the second
 510                  * case. many callers (like llog test) expect ENOSPC,
 511                  * so we preserve this error code, but look for the
 512                  * actual cause here */
 513                 if (rc == -ENOSPC && llog_is_full(loghandle))
 514                         rc = -ENOBUFS;
 515         }
 516         up_write(&loghandle->lgh_lock);
 517
 518         if (rc == -ENOBUFS) {
 519                 if (retried++ == 0)
 520                         GOTO(retry, rc);
 521                 CERROR("%s: error on 2nd llog: rc = %d\n",
 522                        cathandle->lgh_ctxt->loc_obd->obd_name, rc);
 523         }
 524
 525         RETURN(rc);
 526 }
 527 EXPORT_SYMBOL(llog_cat_add_rec);
 528
 529 int llog_cat_declare_add_rec(const struct lu_env *env,
 530                              struct llog_handle *cathandle,
 531                              struct llog_rec_hdr *rec, struct thandle *th)
 532 {
 533         struct llog_thread_info *lgi = llog_info(env);
 534         struct llog_logid_rec   *lirec = &lgi->lgi_logid;
 535         struct llog_handle      *loghandle, *next;
 536         int                      rc = 0;
 537
 538         ENTRY;
 539
 540         if (cathandle->u.chd.chd_current_log == NULL) {
 541                 /* declare new plain llog */
 542                 down_write(&cathandle->lgh_lock);
 543                 if (cathandle->u.chd.chd_current_log == NULL) {
 544                         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle,
 545                                        NULL, NULL, LLOG_OPEN_NEW);
 546                         if (rc == 0) {
 547                                 cathandle->u.chd.chd_current_log = loghandle;
 548                                 list_add_tail(&loghandle->u.phd.phd_entry,
 549                                               &cathandle->u.chd.chd_head);
 550                         }
 551                 }
 552                 up_write(&cathandle->lgh_lock);
 553         } else if (cathandle->u.chd.chd_next_log == NULL ||
 554                    IS_ERR(cathandle->u.chd.chd_next_log)) {
 555                 /* declare next plain llog */
 556                 down_write(&cathandle->lgh_lock);
 557                 if (cathandle->u.chd.chd_next_log == NULL ||
 558                     IS_ERR(cathandle->u.chd.chd_next_log)) {
 559                         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle,
 560                                        NULL, NULL, LLOG_OPEN_NEW);
 561                         if (rc == 0) {
 562                                 cathandle->u.chd.chd_next_log = loghandle;
 563                                 list_add_tail(&loghandle->u.phd.phd_entry,
 564                                               &cathandle->u.chd.chd_head);
 565                         }
 566                 }
 567                 up_write(&cathandle->lgh_lock);
 568         }
 569         if (rc)
 570                 GOTO(out, rc);
 571
 572         lirec->lid_hdr.lrh_len = sizeof(*lirec);
 573
 574         if (!llog_exist(cathandle->u.chd.chd_current_log)) {
 575                 if (dt_object_remote(cathandle->lgh_obj)) {
 576                         /* For remote operation, if we put the llog object
 577                          * creation in the current transaction, then the
 578                          * llog object will not be created on the remote
 579                          * target until the transaction stop, if other
 580                          * operations start before the transaction stop,
 581                          * and use the same llog object, will be dependent
 582                          * on the success of this transaction. So let's
 583                          * create the llog object synchronously here to
 584                          * remove the dependency. */
 585 create_again:
 586                         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 587                         loghandle = cathandle->u.chd.chd_current_log;
 588                         down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 589                         if (cathandle->lgh_stale) {
 590                                 up_write(&loghandle->lgh_lock);
 591                                 up_read(&cathandle->lgh_lock);
 592                                 GOTO(out, rc = -EIO);
 593                         }
 594                         if (!llog_exist(loghandle)) {
 595                                 rc = llog_cat_new_log(env, cathandle, loghandle,
 596                                                       NULL);
 597                                 if (rc == -ESTALE)
 598                                         cathandle->lgh_stale = 1;
 599                         }
 600                         up_write(&loghandle->lgh_lock);
 601                         up_read(&cathandle->lgh_lock);
 602                         if (rc == -ESTALE) {
 603                                 rc = llog_cat_update_header(env, cathandle);
 604                                 if (rc != 0)
 605                                         GOTO(out, rc);
 606                                 goto create_again;
 607                         } else if (rc < 0) {
 608                                 GOTO(out, rc);
 609                         }
 610                 } else {
 611                         rc = llog_declare_create(env,
 612                                         cathandle->u.chd.chd_current_log, th);
 613                         if (rc)
 614                                 GOTO(out, rc);
 615                         llog_declare_write_rec(env, cathandle,
 616                                                &lirec->lid_hdr, -1, th);
 617                 }
 618         }
 619
 620 write_again:
 621         /* declare records in the llogs */
 622         rc = llog_declare_write_rec(env, cathandle->u.chd.chd_current_log,
 623                                     rec, -1, th);
 624         if (rc == -ESTALE) {
 625                 down_write(&cathandle->lgh_lock);
 626                 if (cathandle->lgh_stale) {
 627                         up_write(&cathandle->lgh_lock);
 628                         GOTO(out, rc = -EIO);
 629                 }
 630
 631                 cathandle->lgh_stale = 1;
 632                 up_write(&cathandle->lgh_lock);
 633                 rc = llog_cat_update_header(env, cathandle);
 634                 if (rc != 0)
 635                         GOTO(out, rc);
 636                 goto write_again;
 637         } else if (rc < 0) {
 638                 GOTO(out, rc);
 639         }
 640
 641         next = cathandle->u.chd.chd_next_log;
 642         if (!IS_ERR_OR_NULL(next)) {
 643                 if (!llog_exist(next)) {
 644                         if (dt_object_remote(cathandle->lgh_obj)) {
 645                                 /* For remote operation, if we put the llog
 646                                  * object creation in the current transaction,
 647                                  * then the llog object will not be created on
 648                                  * the remote target until the transaction stop,
 649                                  * if other operations start before the
 650                                  * transaction stop, and use the same llog
 651                                  * object, will be dependent on the success of
 652                                  * this transaction. So let's create the llog
 653                                  * object synchronously here to remove the
 654                                  * dependency. */
 655                                 down_write_nested(&cathandle->lgh_lock,
 656                                                  LLOGH_CAT);
 657                                 next = cathandle->u.chd.chd_next_log;
 658                                 if (IS_ERR_OR_NULL(next)) {
 659                                         /* Sigh, another thread just tried,
 660                                          * let's fail as well */
 661                                         up_write(&cathandle->lgh_lock);
 662                                         if (next == NULL)
 663                                                 rc = -EIO;
 664                                         else
 665                                                 rc = PTR_ERR(next);
 666                                         GOTO(out, rc);
 667                                 }
 668
 669                                 down_write_nested(&next->lgh_lock, LLOGH_LOG);
 670                                 if (!llog_exist(next)) {
 671                                         rc = llog_cat_new_log(env, cathandle,
 672                                                               next, NULL);
 673                                         if (rc < 0)
 674                                                 cathandle->u.chd.chd_next_log =
 675                                                                 ERR_PTR(rc);
 676                                 }
 677                                 up_write(&next->lgh_lock);
 678                                 up_write(&cathandle->lgh_lock);
 679                                 if (rc < 0)
 680                                         GOTO(out, rc);
 681                         } else {
 682                                 rc = llog_declare_create(env, next, th);
 683                                 llog_declare_write_rec(env, cathandle,
 684                                                 &lirec->lid_hdr, -1, th);
 685                         }
 686                 }
 687                 /* XXX: we hope for declarations made for existing llog
 688                  *      this might be not correct with some backends
 689                  *      where declarations are expected against specific
 690                  *      object like ZFS with full debugging enabled */
 691                 /*llog_declare_write_rec(env, next, rec, -1, th);*/
 692         }
 693 out:
 694         RETURN(rc);
 695 }
 696 EXPORT_SYMBOL(llog_cat_declare_add_rec);
 697
 698 int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
 699                  struct llog_rec_hdr *rec, struct llog_cookie *reccookie)
 700 {
 701         struct llog_ctxt        *ctxt;
 702         struct dt_device        *dt;
 703         struct thandle          *th = NULL;
 704         int                      rc;
 705
 706         ctxt = cathandle->lgh_ctxt;
 707         LASSERT(ctxt);
 708         LASSERT(ctxt->loc_exp);
 709
 710         LASSERT(cathandle->lgh_obj != NULL);
 711         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 712
 713         th = dt_trans_create(env, dt);
 714         if (IS_ERR(th))
 715                 RETURN(PTR_ERR(th));
 716
 717         rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
 718         if (rc)
 719                 GOTO(out_trans, rc);
 720
 721         rc = dt_trans_start_local(env, dt, th);
 722         if (rc)
 723                 GOTO(out_trans, rc);
 724         rc = llog_cat_add_rec(env, cathandle, rec, reccookie, th);
 725 out_trans:
 726         dt_trans_stop(env, dt, th);
 727         RETURN(rc);
 728 }
 729 EXPORT_SYMBOL(llog_cat_add);
 730
 731 /* For each cookie in the cookie array, we clear the log in-use bit and either:
 732  * - the log is empty, so mark it free in the catalog header and delete it
 733  * - the log is not empty, just write out the log header
 734  *
 735  * The cookies may be in different log files, so we need to get new logs
 736  * each time.
 737  *
 738  * Assumes caller has already pushed us into the kernel context.
 739  */
 740 int llog_cat_cancel_records(const struct lu_env *env,
 741                             struct llog_handle *cathandle, int count,
 742                             struct llog_cookie *cookies)
 743 {
 744         int i, index, rc = 0, failed = 0;
 745
 746         ENTRY;
 747
 748         for (i = 0; i < count; i++, cookies++) {
 749                 struct llog_handle *loghandle;
 750                 struct llog_logid *lgl = &cookies->lgc_lgl;
 751                 int  lrc;
 752
 753                 rc = llog_cat_id2handle(env, cathandle, &loghandle, lgl);
 754                 if (rc) {
 755                         CDEBUG(D_HA, "%s: cannot find llog for handle "DFID":%x"
 756                                ": rc = %d\n",
 757                                cathandle->lgh_ctxt->loc_obd->obd_name,
 758                                PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, rc);
 759                         failed++;
 760                         continue;
 761                 }
 762
 763                 if ((cathandle->lgh_ctxt->loc_flags &
 764                      LLOG_CTXT_FLAG_NORMAL_FID) && !llog_exist(loghandle)) {
 765                         /* For update log, some of loghandles of cathandle
 766                          * might not exist because remote llog creation might
 767                          * be failed, so let's skip the record cancellation
 768                          * for these non-exist llogs.
 769                          */
 770                         lrc = -ENOENT;
 771                         CDEBUG(D_HA, "%s: llog "DFID":%x does not exist"
 772                                ": rc = %d\n",
 773                                cathandle->lgh_ctxt->loc_obd->obd_name,
 774                                PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, lrc);
 775                         failed++;
 776                         if (rc == 0)
 777                                 rc = lrc;
 778                         continue;
 779                 }
 780
 781                 lrc = llog_cancel_rec(env, loghandle, cookies->lgc_index);
 782                 if (lrc == LLOG_DEL_PLAIN) { /* log has been destroyed */
 783                         index = loghandle->u.phd.phd_cookie.lgc_index;
 784                         lrc = llog_cat_cleanup(env, cathandle, loghandle,
 785                                                index);
 786                         if (rc == 0)
 787                                 rc = lrc;
 788                 } else if (lrc == -ENOENT) {
 789                         if (rc == 0) /* ENOENT shouldn't rewrite any error */
 790                                 rc = lrc;
 791                 } else if (lrc < 0) {
 792                         failed++;
 793                         if (rc == 0)
 794                                 rc = lrc;
 795                 }
 796                 llog_handle_put(loghandle);
 797         }
 798         if (rc)
 799                 CERROR("%s: fail to cancel %d of %d llog-records: rc = %d\n",
 800                        cathandle->lgh_ctxt->loc_obd->obd_name, failed, count,
 801                        rc);
 802
 803         RETURN(rc);
 804 }
 805 EXPORT_SYMBOL(llog_cat_cancel_records);
 806
 807 static int llog_cat_process_common(const struct lu_env *env,
 808                                    struct llog_handle *cat_llh,
 809                                    struct llog_rec_hdr *rec,
 810                                    struct llog_handle **llhp)
 811 {
 812         struct llog_logid_rec *lir = container_of(rec, typeof(*lir), lid_hdr);
 813         struct llog_log_hdr *hdr;
 814         int rc;
 815
 816         ENTRY;
 817         if (rec->lrh_type != le32_to_cpu(LLOG_LOGID_MAGIC)) {
 818                 rc = -EINVAL;
 819                 CWARN("%s: invalid record in catalog "DFID":%x: rc = %d\n",
 820                       cat_llh->lgh_ctxt->loc_obd->obd_name,
 821                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid),
 822                       cat_llh->lgh_id.lgl_ogen, rc);
 823                 RETURN(rc);
 824         }
 825         CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "DFID"\n",
 826                PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
 827                le32_to_cpu(rec->lrh_index),
 828                PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 829
 830         rc = llog_cat_id2handle(env, cat_llh, llhp, &lir->lid_id);
 831         if (rc) {
 832                 /* After a server crash, a stub of index record in catlog could
 833                  * be kept, because plain log destroy + catlog index record
 834                  * deletion are not atomic. So we end up with an index but no
 835                  * actual record. Destroy the index and move on. */
 836                 if (rc == -ENOENT || rc == -ESTALE)
 837                         rc = LLOG_DEL_RECORD;
 838                 else if (rc)
 839                         CWARN("%s: can't find llog handle "DFID":%x: rc = %d\n",
 840                               cat_llh->lgh_ctxt->loc_obd->obd_name,
 841                               PFID(&lir->lid_id.lgl_oi.oi_fid),
 842                               lir->lid_id.lgl_ogen, rc);
 843
 844                 RETURN(rc);
 845         }
 846
 847         /* clean old empty llogs, do not consider current llog in use */
 848         /* ignore remote (lgh_obj == NULL) llogs */
 849         hdr = (*llhp)->lgh_hdr;
 850         if ((hdr->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 851             hdr->llh_count == 1 && cat_llh->lgh_obj != NULL &&
 852             *llhp != cat_llh->u.chd.chd_current_log) {
 853                 rc = llog_destroy(env, *llhp);
 854                 if (rc)
 855                         CWARN("%s: can't destroy empty log "DFID": rc = %d\n",
 856                               (*llhp)->lgh_ctxt->loc_obd->obd_name,
 857                               PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
 858                 rc = LLOG_DEL_PLAIN;
 859         }
 860
 861         RETURN(rc);
 862 }
 863
 864 static int llog_cat_process_cb(const struct lu_env *env,
 865                                struct llog_handle *cat_llh,
 866                                struct llog_rec_hdr *rec, void *data)
 867 {
 868         struct llog_process_data *d = data;
 869         struct llog_handle *llh = NULL;
 870         int rc;
 871
 872         ENTRY;
 873         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 874         if (rc)
 875                 GOTO(out, rc);
 876
 877         if (rec->lrh_index < d->lpd_startcat) {
 878                 /* Skip processing of the logs until startcat */
 879                 rc = 0;
 880         } else if (d->lpd_startidx > 0) {
 881                 struct llog_process_cat_data cd;
 882
 883                 cd.lpcd_first_idx = d->lpd_startidx;
 884                 cd.lpcd_last_idx = 0;
 885                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 886                                           &cd, false);
 887                 /* Continue processing the next log from idx 0 */
 888                 d->lpd_startidx = 0;
 889         } else {
 890                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 891                                           NULL, false);
 892         }
 893
 894 out:
 895         /* The empty plain log was destroyed while processing */
 896         if (rc == LLOG_DEL_PLAIN) {
 897                 rc = llog_cat_cleanup(env, cat_llh, llh,
 898                                       llh->u.phd.phd_cookie.lgc_index);
 899         } else if (rc == LLOG_DEL_RECORD) {
 900                 /* clear wrong catalog entry */
 901                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
 902         }
 903
 904         if (llh)
 905                 llog_handle_put(llh);
 906
 907         RETURN(rc);
 908 }
 909
 910 int llog_cat_process_or_fork(const struct lu_env *env,
 911                              struct llog_handle *cat_llh, llog_cb_t cat_cb,
 912                              llog_cb_t cb, void *data, int startcat,
 913                              int startidx, bool fork)
 914 {
 915         struct llog_process_data d;
 916         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
 917         int rc;
 918         ENTRY;
 919
 920         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
 921         d.lpd_data = data;
 922         d.lpd_cb = cb;
 923         d.lpd_startcat = startcat;
 924         d.lpd_startidx = startidx;
 925
 926         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
 927             llh->llh_count > 1) {
 928                 struct llog_process_cat_data cd;
 929
 930                 CWARN("%s: catlog "DFID" crosses index zero\n",
 931                       cat_llh->lgh_ctxt->loc_obd->obd_name,
 932                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 933
 934                 cd.lpcd_first_idx = llh->llh_cat_idx;
 935                 cd.lpcd_last_idx = 0;
 936                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 937                                           &d, &cd, fork);
 938                 if (rc != 0)
 939                         RETURN(rc);
 940
 941                 cd.lpcd_first_idx = 0;
 942                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
 943                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 944                                           &d, &cd, fork);
 945         } else {
 946                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 947                                           &d, NULL, fork);
 948         }
 949
 950         RETURN(rc);
 951 }
 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                        PFID(&llh->lgh_id.lgl_oi.oi_fid), size, *cum_size);
 987         }
 988
 989         if (llh != NULL)
 990                 llog_handle_put(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         }
1047         if (rc)
1048                 RETURN(rc);
1049
1050         rc = llog_reverse_process(env, llh, d->lpd_cb, d->lpd_data, NULL);
1051
1052         /* The empty plain was destroyed while processing */
1053         if (rc == LLOG_DEL_PLAIN)
1054                 rc = llog_cat_cleanup(env, cat_llh, llh,
1055                                       llh->u.phd.phd_cookie.lgc_index);
1056
1057         llog_handle_put(llh);
1058         RETURN(rc);
1059 }
1060
1061 int llog_cat_reverse_process(const struct lu_env *env,
1062                              struct llog_handle *cat_llh,
1063                              llog_cb_t cb, void *data)
1064 {
1065         struct llog_process_data d;
1066         struct llog_process_cat_data cd;
1067         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
1068         int rc;
1069         ENTRY;
1070
1071         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
1072         d.lpd_data = data;
1073         d.lpd_cb = cb;
1074
1075         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
1076             llh->llh_count > 1) {
1077                 CWARN("%s: catalog "DFID" crosses index zero\n",
1078                       cat_llh->lgh_ctxt->loc_obd->obd_name,
1079                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
1080
1081                 cd.lpcd_first_idx = 0;
1082                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
1083                 rc = llog_reverse_process(env, cat_llh,
1084                                           llog_cat_reverse_process_cb,
1085                                           &d, &cd);
1086                 if (rc != 0)
1087                         RETURN(rc);
1088
1089                 cd.lpcd_first_idx = le32_to_cpu(llh->llh_cat_idx);
1090                 cd.lpcd_last_idx = 0;
1091                 rc = llog_reverse_process(env, cat_llh,
1092                                           llog_cat_reverse_process_cb,
1093                                           &d, &cd);
1094         } else {
1095                 rc = llog_reverse_process(env, cat_llh,
1096                                           llog_cat_reverse_process_cb,
1097                                           &d, NULL);
1098         }
1099
1100         RETURN(rc);
1101 }
1102 EXPORT_SYMBOL(llog_cat_reverse_process);
1103
1104 static int llog_cat_set_first_idx(struct llog_handle *cathandle, int idx)
1105 {
1106         struct llog_log_hdr *llh = cathandle->lgh_hdr;
1107         int bitmap_size;
1108
1109         ENTRY;
1110
1111         bitmap_size = LLOG_HDR_BITMAP_SIZE(llh);
1112         /*
1113          * The llh_cat_idx equals to the first used index minus 1
1114          * so if we canceled the first index then llh_cat_idx
1115          * must be renewed.
1116          */
1117         if (llh->llh_cat_idx == (idx - 1)) {
1118                 llh->llh_cat_idx = idx;
1119
1120                 while (idx != cathandle->lgh_last_idx) {
1121                         idx = (idx + 1) % bitmap_size;
1122                         if (!ext2_test_bit(idx, LLOG_HDR_BITMAP(llh))) {
1123                                 /* update llh_cat_idx for each unset bit,
1124                                  * expecting the next one is set */
1125                                 llh->llh_cat_idx = idx;
1126                         } else if (idx == 0) {
1127                                 /* skip header bit */
1128                                 llh->llh_cat_idx = 0;
1129                                 continue;
1130                         } else {
1131                                 /* the first index is found */
1132                                 break;
1133                         }
1134                 }
1135
1136                 CDEBUG(D_RPCTRACE, "catlog "DFID" first idx %u, last_idx %u\n",
1137                        PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
1138                        llh->llh_cat_idx, cathandle->lgh_last_idx);
1139         }
1140
1141         RETURN(0);
1142 }
1143
1144 /* Cleanup deleted plain llog traces from catalog */
1145 int llog_cat_cleanup(const struct lu_env *env, struct llog_handle *cathandle,
1146                      struct llog_handle *loghandle, int index)
1147 {
1148         int rc;
1149
1150         LASSERT(index);
1151         if (loghandle != NULL) {
1152                 /* remove destroyed llog from catalog list and
1153                  * chd_current_log variable */
1154                 down_write(&cathandle->lgh_lock);
1155                 if (cathandle->u.chd.chd_current_log == loghandle)
1156                         cathandle->u.chd.chd_current_log = NULL;
1157                 list_del_init(&loghandle->u.phd.phd_entry);
1158                 up_write(&cathandle->lgh_lock);
1159                 LASSERT(index == loghandle->u.phd.phd_cookie.lgc_index);
1160                 /* llog was opened and keep in a list, close it now */
1161                 llog_close(env, loghandle);
1162         }
1163
1164         /* do not attempt to cleanup on-disk llog if on client side */
1165         if (cathandle->lgh_obj == NULL)
1166                 return 0;
1167
1168         /* remove plain llog entry from catalog by index */
1169         llog_cat_set_first_idx(cathandle, index);
1170         rc = llog_cancel_rec(env, cathandle, index);
1171         if (rc == 0)
1172                 CDEBUG(D_HA, "cancel plain log at index %u of catalog "DFID"\n",
1173                        index, PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
1174         return rc;
1175 }