lustre/obdclass/llog_cat.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/obdclass/llog_cat.c
  32  *
  33  * OST<->MDS recovery logging infrastructure.
  34  *
  35  * Invariants in implementation:
  36  * - we do not share logs among different OST<->MDS connections, so that
  37  *   if an OST or MDS fails it need only look at log(s) relevant to itself
  38  *
  39  * Author: Andreas Dilger <adilger@clusterfs.com>
  40  * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
  41  * Author: Mikhail Pershin <mike.pershin@intel.com>
  42  */
  43
  44 #define DEBUG_SUBSYSTEM S_LOG
  45
  46
  47 #include <obd_class.h>
  48
  49 #include "llog_internal.h"
  50
  51
  52 /**
  53  * lockdep markers for nested struct llog_handle::lgh_lock locking.
  54  */
  55 enum {
  56         LLOGH_CAT,
  57         LLOGH_LOG,
  58 };
  59
  60 /* Create a new log handle and add it to the open list.
  61  * This log handle will be closed when all of the records in it are removed.
  62  *
  63  * Assumes caller has already pushed us into the kernel context and is locking.
  64  */
  65 static int llog_cat_new_log(const struct lu_env *env,
  66                             struct llog_handle *cathandle,
  67                             struct llog_handle *loghandle,
  68                             struct thandle *th)
  69 {
  70         struct llog_thread_info *lgi = llog_info(env);
  71         struct llog_logid_rec   *rec = &lgi->lgi_logid;
  72         struct thandle *handle = NULL;
  73         struct dt_device *dt = NULL;
  74         struct llog_log_hdr     *llh = cathandle->lgh_hdr;
  75         int                      rc, index;
  76
  77         ENTRY;
  78
  79         index = (cathandle->lgh_last_idx + 1) %
  80                 (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS) ? (cfs_fail_val + 1) :
  81                                                 LLOG_HDR_BITMAP_SIZE(llh));
  82
  83         /* check that new llog index will not overlap with the first one.
  84          * - llh_cat_idx is the index just before the first/oldest still in-use
  85          *      index in catalog
  86          * - lgh_last_idx is the last/newest used index in catalog
  87          *
  88          * When catalog is not wrapped yet then lgh_last_idx is always larger
  89          * than llh_cat_idx. After the wrap around lgh_last_idx re-starts
  90          * from 0 and llh_cat_idx becomes the upper limit for it
  91          *
  92          * Check if catalog has already wrapped around or not by comparing
  93          * last_idx and cat_idx */
  94         if ((index == llh->llh_cat_idx + 1 && llh->llh_count > 1) ||
  95             (index == 0 && llh->llh_cat_idx == 0)) {
  96                 if (cathandle->lgh_name == NULL) {
  97                         CWARN("%s: there are no more free slots in catalog "
  98                               DFID":%x\n",
  99                               loghandle2name(loghandle),
 100                               PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
 101                               cathandle->lgh_id.lgl_ogen);
 102                 } else {
 103                         CWARN("%s: there are no more free slots in "
 104                               "catalog %s\n", loghandle2name(loghandle),
 105                               cathandle->lgh_name);
 106                 }
 107                 RETURN(-ENOSPC);
 108         }
 109
 110         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED))
 111                 RETURN(-ENOSPC);
 112
 113         if (loghandle->lgh_hdr != NULL) {
 114                 /* If llog object is remote and creation is failed, lgh_hdr
 115                  * might be left over here, free it first */
 116                 LASSERT(!llog_exist(loghandle));
 117                 OBD_FREE_LARGE(loghandle->lgh_hdr, loghandle->lgh_hdr_size);
 118                 loghandle->lgh_hdr = NULL;
 119         }
 120
 121         if (th == NULL) {
 122                 dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 123
 124                 handle = dt_trans_create(env, dt);
 125                 if (IS_ERR(handle))
 126                         RETURN(PTR_ERR(handle));
 127
 128                 /* Create update llog object synchronously, which
 129                  * happens during inialization process see
 130                  * lod_sub_prep_llog(), to make sure the update
 131                  * llog object is created before corss-MDT writing
 132                  * updates into the llog object */
 133                 if (cathandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID)
 134                         handle->th_sync = 1;
 135
 136                 handle->th_wait_submit = 1;
 137
 138                 rc = llog_declare_create(env, loghandle, handle);
 139                 if (rc != 0)
 140                         GOTO(out, rc);
 141
 142                 rec->lid_hdr.lrh_len = sizeof(*rec);
 143                 rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 144                 rec->lid_id = loghandle->lgh_id;
 145                 rc = llog_declare_write_rec(env, cathandle, &rec->lid_hdr, -1,
 146                                             handle);
 147                 if (rc != 0)
 148                         GOTO(out, rc);
 149
 150                 rc = dt_trans_start_local(env, dt, handle);
 151                 if (rc != 0)
 152                         GOTO(out, rc);
 153
 154                 th = handle;
 155         }
 156
 157         rc = llog_create(env, loghandle, th);
 158         /* if llog is already created, no need to initialize it */
 159         if (rc == -EEXIST) {
 160                 GOTO(out, rc = 0);
 161         } else if (rc != 0) {
 162                 CERROR("%s: can't create new plain llog in catalog: rc = %d\n",
 163                        loghandle2name(loghandle), rc);
 164                 GOTO(out, rc);
 165         }
 166
 167         rc = llog_init_handle(env, loghandle,
 168                               LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
 169                               &cathandle->lgh_hdr->llh_tgtuuid);
 170         if (rc < 0)
 171                 GOTO(out, rc);
 172
 173         /* build the record for this log in the catalog */
 174         rec->lid_hdr.lrh_len = sizeof(*rec);
 175         rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 176         rec->lid_id = loghandle->lgh_id;
 177
 178         /* append the new record into catalog. The new index will be
 179          * assigned to the record and updated in rec header */
 180         rc = llog_write_rec(env, cathandle, &rec->lid_hdr,
 181                             &loghandle->u.phd.phd_cookie, LLOG_NEXT_IDX, th);
 182         if (rc < 0)
 183                 GOTO(out_destroy, rc);
 184
 185         CDEBUG(D_OTHER, "new plain log "DFID".%u of catalog "DFID"\n",
 186                PFID(&loghandle->lgh_id.lgl_oi.oi_fid), rec->lid_hdr.lrh_index,
 187                PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
 188
 189         loghandle->lgh_hdr->llh_cat_idx = rec->lid_hdr.lrh_index;
 190
 191         /* limit max size of plain llog so that space can be
 192          * released sooner, especially on small filesystems */
 193         /* 2MB for the cases when free space hasn't been learned yet */
 194         loghandle->lgh_max_size = 2 << 20;
 195         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 196         rc = dt_statfs(env, dt, &lgi->lgi_statfs);
 197         if (rc == 0 && lgi->lgi_statfs.os_bfree > 0) {
 198                 __u64 freespace = (lgi->lgi_statfs.os_bfree *
 199                                   lgi->lgi_statfs.os_bsize) >> 6;
 200                 if (freespace < loghandle->lgh_max_size)
 201                         loghandle->lgh_max_size = freespace;
 202                 /* shouldn't be > 128MB in any case?
 203                  * it's 256K records of 512 bytes each */
 204                 if (freespace > (128 << 20))
 205                         loghandle->lgh_max_size = 128 << 20;
 206         }
 207         if (unlikely(OBD_FAIL_PRECHECK(OBD_FAIL_PLAIN_RECORDS) ||
 208                      OBD_FAIL_PRECHECK(OBD_FAIL_CATALOG_FULL_CHECK))) {
 209                 // limit the numer of plain records for test
 210                 loghandle->lgh_max_size = loghandle->lgh_hdr_size +
 211                        cfs_fail_val * 64;
 212         }
 213
 214         rc = 0;
 215
 216 out:
 217         if (handle != NULL) {
 218                 handle->th_result = rc >= 0 ? 0 : rc;
 219                 dt_trans_stop(env, dt, handle);
 220         }
 221         RETURN(rc);
 222
 223 out_destroy:
 224         /* to signal llog_cat_close() it shouldn't try to destroy the llog,
 225          * we want to destroy it in this transaction, otherwise the object
 226          * becomes an orphan */
 227         loghandle->lgh_hdr->llh_flags &= ~LLOG_F_ZAP_WHEN_EMPTY;
 228         /* this is to mimic full log, so another llog_cat_current_log()
 229          * can skip it and ask for another onet */
 230         loghandle->lgh_last_idx = LLOG_HDR_BITMAP_SIZE(loghandle->lgh_hdr) + 1;
 231         llog_trans_destroy(env, loghandle, th);
 232         if (handle != NULL)
 233                 dt_trans_stop(env, dt, handle);
 234         RETURN(rc);
 235 }
 236
 237 static int llog_cat_refresh(const struct lu_env *env,
 238                             struct llog_handle *cathandle)
 239 {
 240         struct llog_handle *loghandle;
 241         int rc;
 242
 243         down_write(&cathandle->lgh_lock);
 244         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 245                             u.phd.phd_entry) {
 246                 if (!llog_exist(loghandle))
 247                         continue;
 248
 249                 down_write(&loghandle->lgh_lock);
 250                 rc = llog_read_header(env, loghandle, NULL);
 251                 up_write(&loghandle->lgh_lock);
 252                 if (rc)
 253                         goto unlock;
 254         }
 255
 256         rc = llog_read_header(env, cathandle, NULL);
 257 unlock:
 258         up_write(&cathandle->lgh_lock);
 259
 260         return rc;
 261 }
 262
 263 /*
 264  * prepare current/next log for catalog.
 265  *
 266  * if \a *ploghandle is NULL, open it, and declare create, NB, if \a
 267  * *ploghandle is remote, create it synchronously here, see comments
 268  * below.
 269  *
 270  * \a cathandle->lgh_lock is down_read-ed, it gets down_write-ed if \a
 271  * *ploghandle has to be opened.
 272  */
 273 static int llog_cat_prep_log(const struct lu_env *env,
 274                              struct llog_handle *cathandle,
 275                              struct llog_handle **ploghandle,
 276                              struct thandle *th)
 277 {
 278         int rc;
 279         int sem_upgraded;
 280
 281 start:
 282         rc = 0;
 283         sem_upgraded = 0;
 284         if (IS_ERR_OR_NULL(*ploghandle)) {
 285                 up_read(&cathandle->lgh_lock);
 286                 down_write(&cathandle->lgh_lock);
 287                 sem_upgraded = 1;
 288                 if (IS_ERR_OR_NULL(*ploghandle)) {
 289                         struct llog_handle *loghandle;
 290
 291                         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle,
 292                                        NULL, NULL, LLOG_OPEN_NEW);
 293                         if (!rc) {
 294                                 *ploghandle = loghandle;
 295                                 list_add_tail(&loghandle->u.phd.phd_entry,
 296                                               &cathandle->u.chd.chd_head);
 297                         }
 298                 }
 299                 if (rc)
 300                         GOTO(out, rc);
 301         }
 302
 303         rc = llog_exist(*ploghandle);
 304         if (rc < 0)
 305                 GOTO(out, rc);
 306         if (rc)
 307                 GOTO(out, rc = 0);
 308
 309         if (dt_object_remote(cathandle->lgh_obj)) {
 310                 down_write_nested(&(*ploghandle)->lgh_lock, LLOGH_LOG);
 311                 if (!llog_exist(*ploghandle)) {
 312                         /* For remote operation, if we put the llog object
 313                          * creation in the current transaction, then the
 314                          * llog object will not be created on the remote
 315                          * target until the transaction stop, if other
 316                          * operations start before the transaction stop,
 317                          * and use the same llog object, will be dependent
 318                          * on the success of this transaction. So let's
 319                          * create the llog object synchronously here to
 320                          * remove the dependency. */
 321                         rc = llog_cat_new_log(env, cathandle, *ploghandle,
 322                                               NULL);
 323                         if (rc == -ESTALE) {
 324                                 up_write(&(*ploghandle)->lgh_lock);
 325                                 if (sem_upgraded)
 326                                         up_write(&cathandle->lgh_lock);
 327                                 else
 328                                         up_read(&cathandle->lgh_lock);
 329
 330                                 rc = llog_cat_refresh(env, cathandle);
 331                                 down_read_nested(&cathandle->lgh_lock,
 332                                                  LLOGH_CAT);
 333                                 if (rc)
 334                                         return rc;
 335                                 /* *ploghandle might become NULL, restart */
 336                                 goto start;
 337                         }
 338                 }
 339                 up_write(&(*ploghandle)->lgh_lock);
 340         } else {
 341                 struct llog_thread_info *lgi = llog_info(env);
 342                 struct llog_logid_rec *lirec = &lgi->lgi_logid;
 343
 344                 rc = llog_declare_create(env, *ploghandle, th);
 345                 if (rc)
 346                         GOTO(out, rc);
 347
 348                 lirec->lid_hdr.lrh_len = sizeof(*lirec);
 349                 rc = llog_declare_write_rec(env, cathandle, &lirec->lid_hdr, -1,
 350                                             th);
 351         }
 352
 353 out:
 354         if (sem_upgraded) {
 355                 up_write(&cathandle->lgh_lock);
 356                 down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 357                 if (rc == 0)
 358                         goto start;
 359         }
 360         return rc;
 361 }
 362
 363 /* Open an existent log handle and add it to the open list.
 364  * This log handle will be closed when all of the records in it are removed.
 365  *
 366  * Assumes caller has already pushed us into the kernel context and is locking.
 367  * We return a lock on the handle to ensure nobody yanks it from us.
 368  *
 369  * This takes extra reference on llog_handle via llog_handle_get() and require
 370  * this reference to be put by caller using llog_handle_put()
 371  */
 372 int llog_cat_id2handle(const struct lu_env *env, struct llog_handle *cathandle,
 373                        struct llog_handle **res, struct llog_logid *logid)
 374 {
 375         struct llog_handle      *loghandle;
 376         enum llog_flag           fmt;
 377         int                      rc = 0;
 378
 379         ENTRY;
 380
 381         if (cathandle == NULL)
 382                 RETURN(-EBADF);
 383
 384         fmt = cathandle->lgh_hdr->llh_flags & LLOG_F_EXT_MASK;
 385         down_write(&cathandle->lgh_lock);
 386         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 387                             u.phd.phd_entry) {
 388                 struct llog_logid *cgl = &loghandle->lgh_id;
 389
 390                 if (ostid_id(&cgl->lgl_oi) == ostid_id(&logid->lgl_oi) &&
 391                     ostid_seq(&cgl->lgl_oi) == ostid_seq(&logid->lgl_oi)) {
 392                         if (cgl->lgl_ogen != logid->lgl_ogen) {
 393                                 CWARN("%s: log "DFID" generation %x != %x\n",
 394                                       loghandle2name(loghandle),
 395                                       PFID(&logid->lgl_oi.oi_fid),
 396                                       cgl->lgl_ogen, logid->lgl_ogen);
 397                                 continue;
 398                         }
 399                         *res = llog_handle_get(loghandle);
 400                         if (!*res) {
 401                                 CERROR("%s: log "DFID" refcount is zero!\n",
 402                                        loghandle2name(loghandle),
 403                                        PFID(&logid->lgl_oi.oi_fid));
 404                                 continue;
 405                         }
 406                         loghandle->u.phd.phd_cat_handle = cathandle;
 407                         up_write(&cathandle->lgh_lock);
 408                         RETURN(rc);
 409                 }
 410         }
 411         up_write(&cathandle->lgh_lock);
 412
 413         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle, logid, NULL,
 414                        LLOG_OPEN_EXISTS);
 415         if (rc < 0) {
 416                 CERROR("%s: error opening log id "DFID":%x: rc = %d\n",
 417                        loghandle2name(cathandle), PFID(&logid->lgl_oi.oi_fid),
 418                        logid->lgl_ogen, rc);
 419                 RETURN(rc);
 420         }
 421
 422         rc = llog_init_handle(env, loghandle, LLOG_F_IS_PLAIN |
 423                               LLOG_F_ZAP_WHEN_EMPTY | fmt, NULL);
 424         if (rc < 0) {
 425                 llog_close(env, loghandle);
 426                 *res = NULL;
 427                 RETURN(rc);
 428         }
 429
 430         *res = llog_handle_get(loghandle);
 431         LASSERT(*res);
 432         down_write(&cathandle->lgh_lock);
 433         list_add_tail(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head);
 434         up_write(&cathandle->lgh_lock);
 435
 436         loghandle->u.phd.phd_cat_handle = cathandle;
 437         loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id;
 438         loghandle->u.phd.phd_cookie.lgc_index =
 439                                 loghandle->lgh_hdr->llh_cat_idx;
 440         RETURN(0);
 441 }
 442
 443 int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle)
 444 {
 445         struct llog_handle      *loghandle, *n;
 446         int                      rc;
 447
 448         ENTRY;
 449
 450         list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
 451                                  u.phd.phd_entry) {
 452                 struct llog_log_hdr     *llh = loghandle->lgh_hdr;
 453                 int                      index;
 454
 455                 /* unlink open-not-created llogs */
 456                 list_del_init(&loghandle->u.phd.phd_entry);
 457                 llh = loghandle->lgh_hdr;
 458                 if (loghandle->lgh_obj != NULL && llh != NULL &&
 459                     (llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 460                     (llh->llh_count == 1)) {
 461                         rc = llog_destroy(env, loghandle);
 462                         if (rc)
 463                                 CERROR("%s: failure destroying log during "
 464                                        "cleanup: rc = %d\n",
 465                                        loghandle2name(loghandle), rc);
 466
 467                         index = loghandle->u.phd.phd_cookie.lgc_index;
 468                         llog_cat_cleanup(env, cathandle, NULL, index);
 469                 }
 470                 llog_close(env, loghandle);
 471         }
 472         /* if handle was stored in ctxt, remove it too */
 473         if (cathandle->lgh_ctxt->loc_handle == cathandle)
 474                 cathandle->lgh_ctxt->loc_handle = NULL;
 475         rc = llog_close(env, cathandle);
 476         RETURN(rc);
 477 }
 478 EXPORT_SYMBOL(llog_cat_close);
 479
 480 /** Return the currently active log handle.  If the current log handle doesn't
 481  * have enough space left for the current record, start a new one.
 482  *
 483  * If reclen is 0, we only want to know what the currently active log is,
 484  * otherwise we get a lock on this log so nobody can steal our space.
 485  *
 486  * Assumes caller has already pushed us into the kernel context and is locking.
 487  *
 488  * NOTE: loghandle is write-locked upon successful return
 489  */
 490 static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle,
 491                                                 struct thandle *th)
 492 {
 493         struct llog_handle *loghandle = NULL;
 494         ENTRY;
 495
 496
 497         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED2)) {
 498                 down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 499                 GOTO(next, loghandle);
 500         }
 501
 502         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 503         loghandle = cathandle->u.chd.chd_current_log;
 504         if (loghandle) {
 505                 struct llog_log_hdr *llh;
 506
 507                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 508                 llh = loghandle->lgh_hdr;
 509                 if (llh == NULL || !llog_is_full(loghandle)) {
 510                         up_read(&cathandle->lgh_lock);
 511                         RETURN(loghandle);
 512                 } else {
 513                         up_write(&loghandle->lgh_lock);
 514                 }
 515         }
 516         up_read(&cathandle->lgh_lock);
 517
 518         /* time to use next log */
 519
 520         /* first, we have to make sure the state hasn't changed */
 521         down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 522         loghandle = cathandle->u.chd.chd_current_log;
 523         if (loghandle) {
 524                 struct llog_log_hdr *llh;
 525
 526                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 527                 llh = loghandle->lgh_hdr;
 528                 if (llh == NULL || !llog_is_full(loghandle))
 529                         GOTO(out_unlock, loghandle);
 530                 else
 531                         up_write(&loghandle->lgh_lock);
 532         }
 533
 534 next:
 535         /* Sigh, the chd_next_log and chd_current_log is initialized
 536          * in declare phase, and we do not serialize the catlog
 537          * accessing, so it might be possible the llog creation
 538          * thread (see llog_cat_declare_add_rec()) did not create
 539          * llog successfully, then the following thread might
 540          * meet this situation. */
 541         if (IS_ERR_OR_NULL(cathandle->u.chd.chd_next_log)) {
 542                 CERROR("%s: next log does not exist!\n",
 543                        loghandle2name(cathandle));
 544                 loghandle = ERR_PTR(-EIO);
 545                 if (cathandle->u.chd.chd_next_log == NULL) {
 546                         /* Store the error in chd_next_log, so
 547                          * the following process can get correct
 548                          * failure value */
 549                         cathandle->u.chd.chd_next_log = loghandle;
 550                 }
 551                 GOTO(out_unlock, loghandle);
 552         }
 553
 554         CDEBUG(D_INODE, "use next log\n");
 555
 556         loghandle = cathandle->u.chd.chd_next_log;
 557         cathandle->u.chd.chd_current_log = loghandle;
 558         cathandle->u.chd.chd_next_log = NULL;
 559         down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 560
 561 out_unlock:
 562         up_write(&cathandle->lgh_lock);
 563         LASSERT(loghandle);
 564         RETURN(loghandle);
 565 }
 566
 567 /* Add a single record to the recovery log(s) using a catalog
 568  * Returns as llog_write_record
 569  *
 570  * Assumes caller has already pushed us into the kernel context.
 571  */
 572 int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle,
 573                      struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
 574                      struct thandle *th)
 575 {
 576         struct llog_handle *loghandle;
 577         int rc, retried = 0;
 578         ENTRY;
 579
 580         LASSERT(rec->lrh_len <= cathandle->lgh_ctxt->loc_chunk_size);
 581
 582 retry:
 583         loghandle = llog_cat_current_log(cathandle, th);
 584         if (IS_ERR(loghandle))
 585                 RETURN(PTR_ERR(loghandle));
 586
 587         /* loghandle is already locked by llog_cat_current_log() for us */
 588         if (!llog_exist(loghandle)) {
 589                 rc = llog_cat_new_log(env, cathandle, loghandle, th);
 590                 if (rc < 0) {
 591                         up_write(&loghandle->lgh_lock);
 592                         /* nobody should be trying to use this llog */
 593                         down_write(&cathandle->lgh_lock);
 594                         if (cathandle->u.chd.chd_current_log == loghandle)
 595                                 cathandle->u.chd.chd_current_log = NULL;
 596                         up_write(&cathandle->lgh_lock);
 597                         RETURN(rc);
 598                 }
 599         }
 600         /* now let's try to add the record */
 601         rc = llog_write_rec(env, loghandle, rec, reccookie, LLOG_NEXT_IDX, th);
 602         if (rc < 0) {
 603                 CDEBUG_LIMIT(rc == -ENOSPC ? D_HA : D_ERROR,
 604                              "llog_write_rec %d: lh=%p\n", rc, loghandle);
 605                 /* -ENOSPC is returned if no empty records left
 606                  * and when it's lack of space on the stogage.
 607                  * there is no point to try again if it's the second
 608                  * case. many callers (like llog test) expect ENOSPC,
 609                  * so we preserve this error code, but look for the
 610                  * actual cause here */
 611                 if (rc == -ENOSPC && llog_is_full(loghandle))
 612                         rc = -ENOBUFS;
 613         }
 614         up_write(&loghandle->lgh_lock);
 615
 616         if (rc == -ENOBUFS) {
 617                 if (retried++ == 0)
 618                         GOTO(retry, rc);
 619                 CERROR("%s: error on 2nd llog: rc = %d\n",
 620                        loghandle2name(cathandle), rc);
 621         }
 622
 623         RETURN(rc);
 624 }
 625 EXPORT_SYMBOL(llog_cat_add_rec);
 626
 627 int llog_cat_declare_add_rec(const struct lu_env *env,
 628                              struct llog_handle *cathandle,
 629                              struct llog_rec_hdr *rec, struct thandle *th)
 630 {
 631         int rc;
 632
 633         ENTRY;
 634
 635 start:
 636         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 637         rc = llog_cat_prep_log(env, cathandle,
 638                                &cathandle->u.chd.chd_current_log, th);
 639         if (rc)
 640                 GOTO(unlock, rc);
 641
 642         rc = llog_cat_prep_log(env, cathandle, &cathandle->u.chd.chd_next_log,
 643                                th);
 644         if (rc)
 645                 GOTO(unlock, rc);
 646
 647         rc = llog_declare_write_rec(env, cathandle->u.chd.chd_current_log,
 648                                     rec, -1, th);
 649         if (rc == -ESTALE && dt_object_remote(cathandle->lgh_obj)) {
 650                 up_read(&cathandle->lgh_lock);
 651                 rc = llog_cat_refresh(env, cathandle);
 652                 if (rc)
 653                         RETURN(rc);
 654                 goto start;
 655         }
 656
 657 #if 0
 658         /*
 659          * XXX: we hope for declarations made for existing llog this might be
 660          * not correct with some backends where declarations are expected
 661          * against specific object like ZFS with full debugging enabled.
 662          */
 663         rc = llog_declare_write_rec(env, cathandle->u.chd.chd_next_log, rec, -1,
 664                                     th);
 665 #endif
 666 unlock:
 667         up_read(&cathandle->lgh_lock);
 668         RETURN(rc);
 669 }
 670 EXPORT_SYMBOL(llog_cat_declare_add_rec);
 671
 672 int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
 673                  struct llog_rec_hdr *rec, struct llog_cookie *reccookie)
 674 {
 675         struct llog_ctxt        *ctxt;
 676         struct dt_device        *dt;
 677         struct thandle          *th = NULL;
 678         int                      rc;
 679
 680         ctxt = cathandle->lgh_ctxt;
 681         LASSERT(ctxt);
 682         LASSERT(ctxt->loc_exp);
 683
 684         LASSERT(cathandle->lgh_obj != NULL);
 685         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 686
 687         th = dt_trans_create(env, dt);
 688         if (IS_ERR(th))
 689                 RETURN(PTR_ERR(th));
 690
 691         rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
 692         if (rc)
 693                 GOTO(out_trans, rc);
 694
 695         rc = dt_trans_start_local(env, dt, th);
 696         if (rc)
 697                 GOTO(out_trans, rc);
 698         rc = llog_cat_add_rec(env, cathandle, rec, reccookie, th);
 699 out_trans:
 700         dt_trans_stop(env, dt, th);
 701         RETURN(rc);
 702 }
 703 EXPORT_SYMBOL(llog_cat_add);
 704
 705 int llog_cat_cancel_arr_rec(const struct lu_env *env,
 706                             struct llog_handle *cathandle,
 707                             struct llog_logid *lgl, int count, int *index)
 708 {
 709         struct llog_handle *loghandle;
 710         int  rc;
 711
 712         ENTRY;
 713         rc = llog_cat_id2handle(env, cathandle, &loghandle, lgl);
 714         if (rc) {
 715                 CDEBUG(D_HA, "%s: cannot find llog for handle "DFID":%x"
 716                        ": rc = %d\n", loghandle2name(cathandle),
 717                        PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, rc);
 718                 RETURN(rc);
 719         }
 720
 721         if ((cathandle->lgh_ctxt->loc_flags &
 722              LLOG_CTXT_FLAG_NORMAL_FID) && !llog_exist(loghandle)) {
 723                 /* For update log, some of loghandles of cathandle
 724                  * might not exist because remote llog creation might
 725                  * be failed, so let's skip the record cancellation
 726                  * for these non-exist llogs.
 727                  */
 728                 rc = -ENOENT;
 729                 CDEBUG(D_HA, "%s: llog "DFID":%x does not exist"
 730                        ": rc = %d\n", loghandle2name(cathandle),
 731                        PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, rc);
 732
 733                 llog_handle_put(env, loghandle);
 734                 RETURN(rc);
 735         }
 736
 737         rc = llog_cancel_arr_rec(env, loghandle, count, index);
 738         if (rc == LLOG_DEL_PLAIN) { /* log has been destroyed */
 739                 int cat_index;
 740
 741                 cat_index = loghandle->u.phd.phd_cookie.lgc_index;
 742                 rc = llog_cat_cleanup(env, cathandle, loghandle, cat_index);
 743                 if (rc)
 744                         CERROR("%s: fail to cancel catalog record: rc = %d\n",
 745                                loghandle2name(cathandle), rc);
 746                 rc = 0;
 747
 748         }
 749         llog_handle_put(env, loghandle);
 750
 751         if (rc)
 752                 CERROR("%s: fail to cancel %d llog-records: rc = %d\n",
 753                        loghandle2name(cathandle), count, rc);
 754
 755         RETURN(rc);
 756 }
 757 EXPORT_SYMBOL(llog_cat_cancel_arr_rec);
 758
 759 /* For each cookie in the cookie array, we clear the log in-use bit and either:
 760  * - the log is empty, so mark it free in the catalog header and delete it
 761  * - the log is not empty, just write out the log header
 762  *
 763  * The cookies may be in different log files, so we need to get new logs
 764  * each time.
 765  *
 766  * Assumes caller has already pushed us into the kernel context.
 767  */
 768 int llog_cat_cancel_records(const struct lu_env *env,
 769                             struct llog_handle *cathandle, int count,
 770                             struct llog_cookie *cookies)
 771 {
 772         int i, rc = 0, failed = 0;
 773
 774         ENTRY;
 775
 776         for (i = 0; i < count; i++, cookies++) {
 777                 int lrc;
 778
 779                 lrc = llog_cat_cancel_arr_rec(env, cathandle, &cookies->lgc_lgl,
 780                                              1, &cookies->lgc_index);
 781                 if (lrc) {
 782                         failed++;
 783                         if (!rc)
 784                                 rc = lrc;
 785                 }
 786         }
 787         if (failed)
 788                 CERROR("%s: fail to cancel %d of %d llog-records: rc = %d\n",
 789                        loghandle2name(cathandle), failed, count, rc);
 790         RETURN(rc);
 791 }
 792 EXPORT_SYMBOL(llog_cat_cancel_records);
 793
 794 static int llog_cat_process_common(const struct lu_env *env,
 795                                    struct llog_handle *cat_llh,
 796                                    struct llog_rec_hdr *rec,
 797                                    struct llog_handle **llhp)
 798 {
 799         struct llog_logid_rec *lir = container_of(rec, typeof(*lir), lid_hdr);
 800         struct llog_log_hdr *hdr;
 801         int rc;
 802
 803         ENTRY;
 804         if (rec->lrh_type != le32_to_cpu(LLOG_LOGID_MAGIC)) {
 805                 rc = -EINVAL;
 806                 CWARN("%s: invalid record in catalog "DFID":%x: rc = %d\n",
 807                       loghandle2name(cat_llh),
 808                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid),
 809                       cat_llh->lgh_id.lgl_ogen, rc);
 810                 RETURN(rc);
 811         }
 812         CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "DFID"\n",
 813                PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
 814                le32_to_cpu(rec->lrh_index),
 815                PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 816
 817         rc = llog_cat_id2handle(env, cat_llh, llhp, &lir->lid_id);
 818         if (rc) {
 819                 /* After a server crash, a stub of index record in catlog could
 820                  * be kept, because plain log destroy + catlog index record
 821                  * deletion are not atomic. So we end up with an index but no
 822                  * actual record. Destroy the index and move on. */
 823                 if (rc == -ENOENT || rc == -ESTALE)
 824                         rc = LLOG_DEL_RECORD;
 825                 else if (rc)
 826                         CWARN("%s: can't find llog handle "DFID":%x: rc = %d\n",
 827                               loghandle2name(cat_llh),
 828                               PFID(&lir->lid_id.lgl_oi.oi_fid),
 829                               lir->lid_id.lgl_ogen, rc);
 830
 831                 RETURN(rc);
 832         }
 833
 834         /* clean old empty llogs, do not consider current llog in use */
 835         /* ignore remote (lgh_obj == NULL) llogs */
 836         hdr = (*llhp)->lgh_hdr;
 837         if ((hdr->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 838             hdr->llh_count == 1 && cat_llh->lgh_obj != NULL &&
 839             *llhp != cat_llh->u.chd.chd_current_log &&
 840             *llhp != cat_llh->u.chd.chd_next_log) {
 841                 rc = llog_destroy(env, *llhp);
 842                 if (rc)
 843                         CWARN("%s: can't destroy empty log "DFID": rc = %d\n",
 844                               loghandle2name((*llhp)),
 845                               PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
 846                 rc = LLOG_DEL_PLAIN;
 847         }
 848
 849         RETURN(rc);
 850 }
 851
 852 static int llog_cat_process_cb(const struct lu_env *env,
 853                                struct llog_handle *cat_llh,
 854                                struct llog_rec_hdr *rec, void *data)
 855 {
 856         struct llog_process_data *d = data;
 857         struct llog_handle *llh = NULL;
 858         int rc;
 859
 860         ENTRY;
 861         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 862         if (rc)
 863                 GOTO(out, rc);
 864
 865         if (rec->lrh_index < d->lpd_startcat) {
 866                 /* Skip processing of the logs until startcat */
 867                 rc = 0;
 868         } else if (d->lpd_startidx > 0) {
 869                 struct llog_process_cat_data cd;
 870
 871                 cd.lpcd_read_mode = LLOG_READ_MODE_NORMAL;
 872                 cd.lpcd_first_idx = d->lpd_startidx;
 873                 cd.lpcd_last_idx = 0;
 874                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 875                                           &cd, false);
 876                 /* Continue processing the next log from idx 0 */
 877                 d->lpd_startidx = 0;
 878         } else {
 879                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 880                                           NULL, false);
 881         }
 882         if (rc == -ENOENT && (cat_llh->lgh_hdr->llh_flags & LLOG_F_RM_ON_ERR)) {
 883                 /*
 884                  * plain llog is reported corrupted, so better to just remove
 885                  * it if the caller is fine with that.
 886                  */
 887                 CERROR("%s: remove corrupted/missing llog "DFID"\n",
 888                        loghandle2name(cat_llh),
 889                        PFID(&llh->lgh_id.lgl_oi.oi_fid));
 890                 rc = LLOG_DEL_PLAIN;
 891         }
 892
 893 out:
 894         /* The empty plain log was destroyed while processing */
 895         if (rc == LLOG_DEL_PLAIN || rc == LLOG_DEL_RECORD)
 896                 /* clear wrong catalog entry */
 897                 rc = llog_cat_cleanup(env, cat_llh, llh, rec->lrh_index);
 898         else if (rc == LLOG_SKIP_PLAIN)
 899                 /* processing callback ask to skip the llog -> continue */
 900                 rc = 0;
 901
 902         if (llh)
 903                 llog_handle_put(env, llh);
 904
 905         RETURN(rc);
 906 }
 907
 908 int llog_cat_process_or_fork(const struct lu_env *env,
 909                              struct llog_handle *cat_llh, llog_cb_t cat_cb,
 910                              llog_cb_t cb, void *data, int startcat,
 911                              int startidx, bool fork)
 912 {
 913         struct llog_process_data d;
 914         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
 915         int rc;
 916
 917         ENTRY;
 918
 919         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
 920         d.lpd_data = data;
 921         d.lpd_cb = cb;
 922         d.lpd_startcat = (startcat == LLOG_CAT_FIRST ? 0 : startcat);
 923         d.lpd_startidx = startidx;
 924
 925         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
 926             llh->llh_count > 1) {
 927                 struct llog_process_cat_data cd = {
 928                         .lpcd_read_mode = LLOG_READ_MODE_NORMAL
 929                 };
 930
 931                 CWARN("%s: catlog "DFID" crosses index zero\n",
 932                       loghandle2name(cat_llh),
 933                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 934                 /*startcat = 0 is default value for general processing */
 935                 if ((startcat != LLOG_CAT_FIRST &&
 936                     startcat >= llh->llh_cat_idx) || !startcat) {
 937                         /* processing the catalog part at the end */
 938                         cd.lpcd_first_idx = (startcat ? startcat :
 939                                              llh->llh_cat_idx);
 940                         if (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS))
 941                                 cd.lpcd_last_idx = cfs_fail_val;
 942                         else
 943                                 cd.lpcd_last_idx = 0;
 944                         rc = llog_process_or_fork(env, cat_llh, cat_cb,
 945                                                   &d, &cd, fork);
 946                         /* Reset the startcat becasue it has already reached
 947                          * catalog bottom.
 948                          */
 949                         startcat = 0;
 950                         d.lpd_startcat = 0;
 951                         if (rc != 0)
 952                                 RETURN(rc);
 953                 }
 954                 /* processing the catalog part at the begining */
 955                 cd.lpcd_first_idx = (startcat == LLOG_CAT_FIRST) ? 0 : startcat;
 956                 /* Note, the processing will stop at the lgh_last_idx value,
 957                  * and it could be increased during processing. So records
 958                  * between current lgh_last_idx and lgh_last_idx in future
 959                  * would left unprocessed.
 960                  */
 961                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
 962                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 963                                           &d, &cd, fork);
 964         } else {
 965                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 966                                           &d, NULL, fork);
 967         }
 968
 969         RETURN(rc);
 970 }
 971 EXPORT_SYMBOL(llog_cat_process_or_fork);
 972
 973 int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
 974                      llog_cb_t cb, void *data, int startcat, int startidx)
 975 {
 976         return llog_cat_process_or_fork(env, cat_llh, llog_cat_process_cb,
 977                                         cb, data, startcat, startidx, false);
 978 }
 979 EXPORT_SYMBOL(llog_cat_process);
 980
 981 static int llog_cat_size_cb(const struct lu_env *env,
 982                              struct llog_handle *cat_llh,
 983                              struct llog_rec_hdr *rec, void *data)
 984 {
 985         struct llog_process_data *d = data;
 986         struct llog_handle *llh = NULL;
 987         __u64 *cum_size = d->lpd_data;
 988         __u64 size;
 989         int rc;
 990
 991         ENTRY;
 992         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 993
 994         if (rc == LLOG_DEL_PLAIN) {
 995                 /* empty log was deleted, don't count it */
 996                 rc = llog_cat_cleanup(env, cat_llh, llh,
 997                                       llh->u.phd.phd_cookie.lgc_index);
 998         } else if (rc == LLOG_DEL_RECORD) {
 999                 /* clear wrong catalog entry */
1000                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
1001         } else {
1002                 size = llog_size(env, llh);
1003                 *cum_size += size;
1004
1005                 CDEBUG(D_INFO, "Add llog entry "DFID" size=%llu, tot=%llu\n",
1006                        PFID(&llh->lgh_id.lgl_oi.oi_fid), size, *cum_size);
1007         }
1008
1009         if (llh != NULL)
1010                 llog_handle_put(env, llh);
1011
1012         RETURN(0);
1013 }
1014
1015 __u64 llog_cat_size(const struct lu_env *env, struct llog_handle *cat_llh)
1016 {
1017         __u64 size = llog_size(env, cat_llh);
1018
1019         llog_cat_process_or_fork(env, cat_llh, llog_cat_size_cb,
1020                                  NULL, &size, 0, 0, false);
1021
1022         return size;
1023 }
1024 EXPORT_SYMBOL(llog_cat_size);
1025
1026 /* currently returns the number of "free" entries in catalog,
1027  * ie the available entries for a new plain LLOG file creation,
1028  * even if catalog has wrapped
1029  */
1030 __u32 llog_cat_free_space(struct llog_handle *cat_llh)
1031 {
1032         /* simulate almost full Catalog */
1033         if (OBD_FAIL_CHECK(OBD_FAIL_CAT_FREE_RECORDS))
1034                 return cfs_fail_val;
1035
1036         if (cat_llh->lgh_hdr->llh_count == 1)
1037                 return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1;
1038
1039         if (cat_llh->lgh_last_idx > cat_llh->lgh_hdr->llh_cat_idx)
1040                 return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1 +
1041                        cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
1042
1043         /* catalog is presently wrapped */
1044         return cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
1045 }
1046 EXPORT_SYMBOL(llog_cat_free_space);
1047
1048 static int llog_cat_reverse_process_cb(const struct lu_env *env,
1049                                        struct llog_handle *cat_llh,
1050                                        struct llog_rec_hdr *rec, void *data)
1051 {
1052         struct llog_process_data *d = data;
1053         struct llog_handle *llh;
1054         int rc;
1055
1056         ENTRY;
1057         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
1058
1059         /* The empty plain log was destroyed while processing */
1060         if (rc == LLOG_DEL_PLAIN) {
1061                 rc = llog_cat_cleanup(env, cat_llh, llh,
1062                                       llh->u.phd.phd_cookie.lgc_index);
1063         } else if (rc == LLOG_DEL_RECORD) {
1064                 /* clear wrong catalog entry */
1065                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
1066         } else if (rc == LLOG_SKIP_PLAIN) {
1067                 /* processing callback ask to skip the llog -> continue */
1068                 rc = 0;
1069         }
1070         if (rc)
1071                 RETURN(rc);
1072
1073         rc = llog_reverse_process(env, llh, d->lpd_cb, d->lpd_data, NULL);
1074
1075         /* The empty plain was destroyed while processing */
1076         if (rc == LLOG_DEL_PLAIN)
1077                 rc = llog_cat_cleanup(env, cat_llh, llh,
1078                                       llh->u.phd.phd_cookie.lgc_index);
1079
1080         llog_handle_put(env, llh);
1081         RETURN(rc);
1082 }
1083
1084 int llog_cat_reverse_process(const struct lu_env *env,
1085                              struct llog_handle *cat_llh,
1086                              llog_cb_t cb, void *data)
1087 {
1088         struct llog_process_data d;
1089         struct llog_process_cat_data cd;
1090         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
1091         int rc;
1092         ENTRY;
1093
1094         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
1095         cd.lpcd_read_mode = LLOG_READ_MODE_NORMAL;
1096         d.lpd_data = data;
1097         d.lpd_cb = cb;
1098
1099         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
1100             llh->llh_count > 1) {
1101                 CWARN("%s: catalog "DFID" crosses index zero\n",
1102                       loghandle2name(cat_llh),
1103                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
1104
1105                 cd.lpcd_first_idx = 0;
1106                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
1107                 rc = llog_reverse_process(env, cat_llh,
1108                                           llog_cat_reverse_process_cb,
1109                                           &d, &cd);
1110                 if (rc != 0)
1111                         RETURN(rc);
1112
1113                 cd.lpcd_first_idx = le32_to_cpu(llh->llh_cat_idx);
1114                 cd.lpcd_last_idx = 0;
1115                 rc = llog_reverse_process(env, cat_llh,
1116                                           llog_cat_reverse_process_cb,
1117                                           &d, &cd);
1118         } else {
1119                 rc = llog_reverse_process(env, cat_llh,
1120                                           llog_cat_reverse_process_cb,
1121                                           &d, NULL);
1122         }
1123
1124         RETURN(rc);
1125 }
1126 EXPORT_SYMBOL(llog_cat_reverse_process);
1127
1128 static int llog_cat_set_first_idx(struct llog_handle *cathandle, int idx)
1129 {
1130         struct llog_log_hdr *llh = cathandle->lgh_hdr;
1131         int bitmap_size;
1132
1133         ENTRY;
1134
1135         bitmap_size = LLOG_HDR_BITMAP_SIZE(llh);
1136         /*
1137          * The llh_cat_idx equals to the first used index minus 1
1138          * so if we canceled the first index then llh_cat_idx
1139          * must be renewed.
1140          */
1141         if (llh->llh_cat_idx == (idx - 1)) {
1142                 llh->llh_cat_idx = idx;
1143
1144                 while (idx != cathandle->lgh_last_idx) {
1145                         idx = (idx + 1) % bitmap_size;
1146                         if (!test_bit_le(idx, LLOG_HDR_BITMAP(llh))) {
1147                                 /* update llh_cat_idx for each unset bit,
1148                                  * expecting the next one is set */
1149                                 llh->llh_cat_idx = idx;
1150                         } else if (idx == 0) {
1151                                 /* skip header bit */
1152                                 llh->llh_cat_idx = 0;
1153                                 continue;
1154                         } else {
1155                                 /* the first index is found */
1156                                 break;
1157                         }
1158                 }
1159
1160                 CDEBUG(D_HA, "catlog "DFID" first idx %u, last_idx %u\n",
1161                        PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
1162                        llh->llh_cat_idx, cathandle->lgh_last_idx);
1163         }
1164
1165         RETURN(0);
1166 }
1167
1168 /* Cleanup deleted plain llog traces from catalog */
1169 int llog_cat_cleanup(const struct lu_env *env, struct llog_handle *cathandle,
1170                      struct llog_handle *loghandle, int index)
1171 {
1172         int rc;
1173         struct lu_fid fid = {.f_seq = 0, .f_oid = 0, .f_ver = 0};
1174
1175         LASSERT(index);
1176         if (loghandle != NULL) {
1177                 /* remove destroyed llog from catalog list and
1178                  * chd_current_log variable */
1179                 fid = loghandle->lgh_id.lgl_oi.oi_fid;
1180                 down_write(&cathandle->lgh_lock);
1181                 if (cathandle->u.chd.chd_current_log == loghandle)
1182                         cathandle->u.chd.chd_current_log = NULL;
1183                 list_del_init(&loghandle->u.phd.phd_entry);
1184                 up_write(&cathandle->lgh_lock);
1185                 LASSERT(index == loghandle->u.phd.phd_cookie.lgc_index ||
1186                         loghandle->u.phd.phd_cookie.lgc_index == 0);
1187                 /* llog was opened and keep in a list, close it now */
1188                 llog_close(env, loghandle);
1189         }
1190
1191         /* do not attempt to cleanup on-disk llog if on client side */
1192         if (cathandle->lgh_obj == NULL)
1193                 return 0;
1194
1195         /* remove plain llog entry from catalog by index */
1196         llog_cat_set_first_idx(cathandle, index);
1197         rc = llog_cancel_rec(env, cathandle, index);
1198         if (rc == 0)
1199                 CDEBUG(D_HA,
1200                        "cancel plain log "DFID" at index %u of catalog "DFID"\n",
1201                        PFID(&fid), index,
1202                        PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
1203         return rc;
1204 }