lustre/obdclass/llog_cat.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/obdclass/llog_cat.c
  33  *
  34  * OST<->MDS recovery logging infrastructure.
  35  *
  36  * Invariants in implementation:
  37  * - we do not share logs among different OST<->MDS connections, so that
  38  *   if an OST or MDS fails it need only look at log(s) relevant to itself
  39  *
  40  * Author: Andreas Dilger <adilger@clusterfs.com>
  41  * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
  42  * Author: Mikhail Pershin <mike.pershin@intel.com>
  43  */
  44
  45 #define DEBUG_SUBSYSTEM S_LOG
  46
  47
  48 #include <obd_class.h>
  49
  50 #include "llog_internal.h"
  51
  52
  53 /**
  54  * lockdep markers for nested struct llog_handle::lgh_lock locking.
  55  */
  56 enum {
  57         LLOGH_CAT,
  58         LLOGH_LOG,
  59 };
  60
  61 /* Create a new log handle and add it to the open list.
  62  * This log handle will be closed when all of the records in it are removed.
  63  *
  64  * Assumes caller has already pushed us into the kernel context and is locking.
  65  */
  66 static int llog_cat_new_log(const struct lu_env *env,
  67                             struct llog_handle *cathandle,
  68                             struct llog_handle *loghandle,
  69                             struct thandle *th)
  70 {
  71         struct llog_thread_info *lgi = llog_info(env);
  72         struct llog_logid_rec   *rec = &lgi->lgi_logid;
  73         struct thandle *handle = NULL;
  74         struct dt_device *dt = NULL;
  75         struct llog_log_hdr     *llh = cathandle->lgh_hdr;
  76         int                      rc, index;
  77
  78         ENTRY;
  79
  80         index = (cathandle->lgh_last_idx + 1) %
  81                 (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS) ? (cfs_fail_val + 1) :
  82                                                 LLOG_HDR_BITMAP_SIZE(llh));
  83
  84         /* check that new llog index will not overlap with the first one.
  85          * - llh_cat_idx is the index just before the first/oldest still in-use
  86          *      index in catalog
  87          * - lgh_last_idx is the last/newest used index in catalog
  88          *
  89          * When catalog is not wrapped yet then lgh_last_idx is always larger
  90          * than llh_cat_idx. After the wrap around lgh_last_idx re-starts
  91          * from 0 and llh_cat_idx becomes the upper limit for it
  92          *
  93          * Check if catalog has already wrapped around or not by comparing
  94          * last_idx and cat_idx */
  95         if ((index == llh->llh_cat_idx + 1 && llh->llh_count > 1) ||
  96             (index == 0 && llh->llh_cat_idx == 0)) {
  97                 if (cathandle->lgh_name == NULL) {
  98                         CWARN("%s: there are no more free slots in catalog "
  99                               DFID":%x\n",
 100                               loghandle->lgh_ctxt->loc_obd->obd_name,
 101                               PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
 102                               cathandle->lgh_id.lgl_ogen);
 103                 } else {
 104                         CWARN("%s: there are no more free slots in "
 105                               "catalog %s\n",
 106                               loghandle->lgh_ctxt->loc_obd->obd_name,
 107                               cathandle->lgh_name);
 108                 }
 109                 RETURN(-ENOSPC);
 110         }
 111
 112         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED))
 113                 RETURN(-ENOSPC);
 114
 115         if (loghandle->lgh_hdr != NULL) {
 116                 /* If llog object is remote and creation is failed, lgh_hdr
 117                  * might be left over here, free it first */
 118                 LASSERT(!llog_exist(loghandle));
 119                 OBD_FREE_LARGE(loghandle->lgh_hdr, loghandle->lgh_hdr_size);
 120                 loghandle->lgh_hdr = NULL;
 121         }
 122
 123         if (th == NULL) {
 124                 dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 125
 126                 handle = dt_trans_create(env, dt);
 127                 if (IS_ERR(handle))
 128                         RETURN(PTR_ERR(handle));
 129
 130                 /* Create update llog object synchronously, which
 131                  * happens during inialization process see
 132                  * lod_sub_prep_llog(), to make sure the update
 133                  * llog object is created before corss-MDT writing
 134                  * updates into the llog object */
 135                 if (cathandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID)
 136                         handle->th_sync = 1;
 137
 138                 handle->th_wait_submit = 1;
 139
 140                 rc = llog_declare_create(env, loghandle, handle);
 141                 if (rc != 0)
 142                         GOTO(out, rc);
 143
 144                 rec->lid_hdr.lrh_len = sizeof(*rec);
 145                 rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 146                 rec->lid_id = loghandle->lgh_id;
 147                 rc = llog_declare_write_rec(env, cathandle, &rec->lid_hdr, -1,
 148                                             handle);
 149                 if (rc != 0)
 150                         GOTO(out, rc);
 151
 152                 rc = dt_trans_start_local(env, dt, handle);
 153                 if (rc != 0)
 154                         GOTO(out, rc);
 155
 156                 th = handle;
 157         }
 158
 159         rc = llog_create(env, loghandle, th);
 160         /* if llog is already created, no need to initialize it */
 161         if (rc == -EEXIST) {
 162                 GOTO(out, rc = 0);
 163         } else if (rc != 0) {
 164                 CERROR("%s: can't create new plain llog in catalog: rc = %d\n",
 165                        loghandle->lgh_ctxt->loc_obd->obd_name, rc);
 166                 GOTO(out, rc);
 167         }
 168
 169         rc = llog_init_handle(env, loghandle,
 170                               LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
 171                               &cathandle->lgh_hdr->llh_tgtuuid);
 172         if (rc < 0)
 173                 GOTO(out, rc);
 174
 175         /* build the record for this log in the catalog */
 176         rec->lid_hdr.lrh_len = sizeof(*rec);
 177         rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 178         rec->lid_id = loghandle->lgh_id;
 179
 180         /* append the new record into catalog. The new index will be
 181          * assigned to the record and updated in rec header */
 182         rc = llog_write_rec(env, cathandle, &rec->lid_hdr,
 183                             &loghandle->u.phd.phd_cookie, LLOG_NEXT_IDX, th);
 184         if (rc < 0)
 185                 GOTO(out_destroy, rc);
 186
 187         CDEBUG(D_OTHER, "new plain log "DFID".%u of catalog "DFID"\n",
 188                PFID(&loghandle->lgh_id.lgl_oi.oi_fid), rec->lid_hdr.lrh_index,
 189                PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
 190
 191         loghandle->lgh_hdr->llh_cat_idx = rec->lid_hdr.lrh_index;
 192
 193         /* limit max size of plain llog so that space can be
 194          * released sooner, especially on small filesystems */
 195         /* 2MB for the cases when free space hasn't been learned yet */
 196         loghandle->lgh_max_size = 2 << 20;
 197         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 198         rc = dt_statfs(env, dt, &lgi->lgi_statfs);
 199         if (rc == 0 && lgi->lgi_statfs.os_bfree > 0) {
 200                 __u64 freespace = (lgi->lgi_statfs.os_bfree *
 201                                   lgi->lgi_statfs.os_bsize) >> 6;
 202                 if (freespace < loghandle->lgh_max_size)
 203                         loghandle->lgh_max_size = freespace;
 204                 /* shouldn't be > 128MB in any case?
 205                  * it's 256K records of 512 bytes each */
 206                 if (freespace > (128 << 20))
 207                         loghandle->lgh_max_size = 128 << 20;
 208         }
 209         if (unlikely(OBD_FAIL_PRECHECK(OBD_FAIL_PLAIN_RECORDS) ||
 210                      OBD_FAIL_PRECHECK(OBD_FAIL_CATALOG_FULL_CHECK))) {
 211                 // limit the numer of plain records for test
 212                 loghandle->lgh_max_size = loghandle->lgh_hdr_size +
 213                        cfs_fail_val * 64;
 214         }
 215
 216         rc = 0;
 217
 218 out:
 219         if (handle != NULL) {
 220                 handle->th_result = rc >= 0 ? 0 : rc;
 221                 dt_trans_stop(env, dt, handle);
 222         }
 223         RETURN(rc);
 224
 225 out_destroy:
 226         /* to signal llog_cat_close() it shouldn't try to destroy the llog,
 227          * we want to destroy it in this transaction, otherwise the object
 228          * becomes an orphan */
 229         loghandle->lgh_hdr->llh_flags &= ~LLOG_F_ZAP_WHEN_EMPTY;
 230         /* this is to mimic full log, so another llog_cat_current_log()
 231          * can skip it and ask for another onet */
 232         loghandle->lgh_last_idx = LLOG_HDR_BITMAP_SIZE(loghandle->lgh_hdr) + 1;
 233         llog_trans_destroy(env, loghandle, th);
 234         if (handle != NULL)
 235                 dt_trans_stop(env, dt, handle);
 236         RETURN(rc);
 237 }
 238
 239 static int llog_cat_refresh(const struct lu_env *env,
 240                             struct llog_handle *cathandle)
 241 {
 242         struct llog_handle *loghandle;
 243         int rc;
 244
 245         down_write(&cathandle->lgh_lock);
 246         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 247                             u.phd.phd_entry) {
 248                 if (!llog_exist(loghandle))
 249                         continue;
 250
 251                 rc = llog_read_header(env, loghandle, NULL);
 252                 if (rc)
 253                         goto unlock;
 254         }
 255
 256         rc = llog_read_header(env, cathandle, NULL);
 257 unlock:
 258         up_write(&loghandle->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                                       loghandle->lgh_ctxt->loc_obd->obd_name,
 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                                        loghandle->lgh_ctxt->loc_obd->obd_name,
 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                        cathandle->lgh_ctxt->loc_obd->obd_name,
 418                        PFID(&logid->lgl_oi.oi_fid), logid->lgl_ogen, rc);
 419                 RETURN(rc);
 420         }
 421
 422         rc = llog_init_handle(env, loghandle, LLOG_F_IS_PLAIN | fmt, NULL);
 423         if (rc < 0) {
 424                 llog_close(env, loghandle);
 425                 *res = NULL;
 426                 RETURN(rc);
 427         }
 428
 429         *res = llog_handle_get(loghandle);
 430         LASSERT(*res);
 431         down_write(&cathandle->lgh_lock);
 432         list_add_tail(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head);
 433         up_write(&cathandle->lgh_lock);
 434
 435         loghandle->u.phd.phd_cat_handle = cathandle;
 436         loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id;
 437         loghandle->u.phd.phd_cookie.lgc_index =
 438                                 loghandle->lgh_hdr->llh_cat_idx;
 439         RETURN(0);
 440 }
 441
 442 int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle)
 443 {
 444         struct llog_handle      *loghandle, *n;
 445         int                      rc;
 446
 447         ENTRY;
 448
 449         list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
 450                                  u.phd.phd_entry) {
 451                 struct llog_log_hdr     *llh = loghandle->lgh_hdr;
 452                 int                      index;
 453
 454                 /* unlink open-not-created llogs */
 455                 list_del_init(&loghandle->u.phd.phd_entry);
 456                 llh = loghandle->lgh_hdr;
 457                 if (loghandle->lgh_obj != NULL && llh != NULL &&
 458                     (llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 459                     (llh->llh_count == 1)) {
 460                         rc = llog_destroy(env, loghandle);
 461                         if (rc)
 462                                 CERROR("%s: failure destroying log during "
 463                                        "cleanup: rc = %d\n",
 464                                        loghandle->lgh_ctxt->loc_obd->obd_name,
 465                                        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                        cathandle->lgh_ctxt->loc_obd->obd_name);
 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                        cathandle->lgh_ctxt->loc_obd->obd_name, 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",
 717                        cathandle->lgh_ctxt->loc_obd->obd_name,
 718                        PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, rc);
 719                 RETURN(rc);
 720         }
 721
 722         if ((cathandle->lgh_ctxt->loc_flags &
 723              LLOG_CTXT_FLAG_NORMAL_FID) && !llog_exist(loghandle)) {
 724                 /* For update log, some of loghandles of cathandle
 725                  * might not exist because remote llog creation might
 726                  * be failed, so let's skip the record cancellation
 727                  * for these non-exist llogs.
 728                  */
 729                 rc = -ENOENT;
 730                 CDEBUG(D_HA, "%s: llog "DFID":%x does not exist"
 731                        ": rc = %d\n",
 732                        cathandle->lgh_ctxt->loc_obd->obd_name,
 733                        PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, rc);
 734
 735                 llog_handle_put(env, loghandle);
 736                 RETURN(rc);
 737         }
 738
 739         rc = llog_cancel_arr_rec(env, loghandle, count, index);
 740         if (rc == LLOG_DEL_PLAIN) { /* log has been destroyed */
 741                 int cat_index;
 742
 743                 cat_index = loghandle->u.phd.phd_cookie.lgc_index;
 744                 rc = llog_cat_cleanup(env, cathandle, loghandle, cat_index);
 745                 if (rc)
 746                         CERROR("%s: fail to cancel catalog record: rc = %d\n",
 747                                cathandle->lgh_ctxt->loc_obd->obd_name, rc);
 748                 rc = 0;
 749
 750         }
 751         llog_handle_put(env, loghandle);
 752
 753         if (rc)
 754                 CERROR("%s: fail to cancel %d llog-records: rc = %d\n",
 755                        cathandle->lgh_ctxt->loc_obd->obd_name, count,
 756                        rc);
 757
 758         RETURN(rc);
 759 }
 760 EXPORT_SYMBOL(llog_cat_cancel_arr_rec);
 761
 762 /* For each cookie in the cookie array, we clear the log in-use bit and either:
 763  * - the log is empty, so mark it free in the catalog header and delete it
 764  * - the log is not empty, just write out the log header
 765  *
 766  * The cookies may be in different log files, so we need to get new logs
 767  * each time.
 768  *
 769  * Assumes caller has already pushed us into the kernel context.
 770  */
 771 int llog_cat_cancel_records(const struct lu_env *env,
 772                             struct llog_handle *cathandle, int count,
 773                             struct llog_cookie *cookies)
 774 {
 775         int i, rc = 0, failed = 0;
 776
 777         ENTRY;
 778
 779         for (i = 0; i < count; i++, cookies++) {
 780                 int lrc;
 781
 782                 lrc = llog_cat_cancel_arr_rec(env, cathandle, &cookies->lgc_lgl,
 783                                              1, &cookies->lgc_index);
 784                 if (lrc) {
 785                         failed++;
 786                         if (!rc)
 787                                 rc = lrc;
 788                 }
 789         }
 790         if (failed)
 791                 CERROR("%s: fail to cancel %d of %d llog-records: rc = %d\n",
 792                        cathandle->lgh_ctxt->loc_obd->obd_name, failed, count,
 793                        rc);
 794         RETURN(rc);
 795 }
 796 EXPORT_SYMBOL(llog_cat_cancel_records);
 797
 798 static int llog_cat_process_common(const struct lu_env *env,
 799                                    struct llog_handle *cat_llh,
 800                                    struct llog_rec_hdr *rec,
 801                                    struct llog_handle **llhp)
 802 {
 803         struct llog_logid_rec *lir = container_of(rec, typeof(*lir), lid_hdr);
 804         struct llog_log_hdr *hdr;
 805         int rc;
 806
 807         ENTRY;
 808         if (rec->lrh_type != le32_to_cpu(LLOG_LOGID_MAGIC)) {
 809                 rc = -EINVAL;
 810                 CWARN("%s: invalid record in catalog "DFID":%x: rc = %d\n",
 811                       cat_llh->lgh_ctxt->loc_obd->obd_name,
 812                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid),
 813                       cat_llh->lgh_id.lgl_ogen, rc);
 814                 RETURN(rc);
 815         }
 816         CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "DFID"\n",
 817                PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
 818                le32_to_cpu(rec->lrh_index),
 819                PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 820
 821         rc = llog_cat_id2handle(env, cat_llh, llhp, &lir->lid_id);
 822         if (rc) {
 823                 /* After a server crash, a stub of index record in catlog could
 824                  * be kept, because plain log destroy + catlog index record
 825                  * deletion are not atomic. So we end up with an index but no
 826                  * actual record. Destroy the index and move on. */
 827                 if (rc == -ENOENT || rc == -ESTALE)
 828                         rc = LLOG_DEL_RECORD;
 829                 else if (rc)
 830                         CWARN("%s: can't find llog handle "DFID":%x: rc = %d\n",
 831                               cat_llh->lgh_ctxt->loc_obd->obd_name,
 832                               PFID(&lir->lid_id.lgl_oi.oi_fid),
 833                               lir->lid_id.lgl_ogen, rc);
 834
 835                 RETURN(rc);
 836         }
 837
 838         /* clean old empty llogs, do not consider current llog in use */
 839         /* ignore remote (lgh_obj == NULL) llogs */
 840         hdr = (*llhp)->lgh_hdr;
 841         if ((hdr->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 842             hdr->llh_count == 1 && cat_llh->lgh_obj != NULL &&
 843             *llhp != cat_llh->u.chd.chd_current_log) {
 844                 rc = llog_destroy(env, *llhp);
 845                 if (rc)
 846                         CWARN("%s: can't destroy empty log "DFID": rc = %d\n",
 847                               (*llhp)->lgh_ctxt->loc_obd->obd_name,
 848                               PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
 849                 rc = LLOG_DEL_PLAIN;
 850         }
 851
 852         RETURN(rc);
 853 }
 854
 855 static int llog_cat_process_cb(const struct lu_env *env,
 856                                struct llog_handle *cat_llh,
 857                                struct llog_rec_hdr *rec, void *data)
 858 {
 859         struct llog_process_data *d = data;
 860         struct llog_handle *llh = NULL;
 861         int rc;
 862
 863         ENTRY;
 864         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 865         if (rc)
 866                 GOTO(out, rc);
 867
 868         if (rec->lrh_index < d->lpd_startcat) {
 869                 /* Skip processing of the logs until startcat */
 870                 rc = 0;
 871         } else if (d->lpd_startidx > 0) {
 872                 struct llog_process_cat_data cd;
 873
 874                 cd.lpcd_first_idx = d->lpd_startidx;
 875                 cd.lpcd_last_idx = 0;
 876                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 877                                           &cd, false);
 878                 /* Continue processing the next log from idx 0 */
 879                 d->lpd_startidx = 0;
 880         } else {
 881                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 882                                           NULL, false);
 883         }
 884
 885 out:
 886         /* The empty plain log was destroyed while processing */
 887         if (rc == LLOG_DEL_PLAIN) {
 888                 rc = llog_cat_cleanup(env, cat_llh, llh,
 889                                       llh->u.phd.phd_cookie.lgc_index);
 890         } else if (rc == LLOG_DEL_RECORD) {
 891                 /* clear wrong catalog entry */
 892                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
 893         }
 894
 895         if (llh)
 896                 llog_handle_put(env, llh);
 897
 898         RETURN(rc);
 899 }
 900
 901 int llog_cat_process_or_fork(const struct lu_env *env,
 902                              struct llog_handle *cat_llh, llog_cb_t cat_cb,
 903                              llog_cb_t cb, void *data, int startcat,
 904                              int startidx, bool fork)
 905 {
 906         struct llog_process_data d;
 907         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
 908         int rc;
 909
 910         ENTRY;
 911
 912         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
 913         d.lpd_data = data;
 914         d.lpd_cb = cb;
 915         d.lpd_startcat = (startcat == LLOG_CAT_FIRST ? 0 : startcat);
 916         d.lpd_startidx = startidx;
 917
 918         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
 919             llh->llh_count > 1) {
 920                 struct llog_process_cat_data cd;
 921
 922                 CWARN("%s: catlog "DFID" crosses index zero\n",
 923                       cat_llh->lgh_ctxt->loc_obd->obd_name,
 924                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 925                 /*startcat = 0 is default value for general processing */
 926                 if ((startcat != LLOG_CAT_FIRST &&
 927                     startcat >= llh->llh_cat_idx) || !startcat) {
 928                         /* processing the catalog part at the end */
 929                         cd.lpcd_first_idx = (startcat ? startcat :
 930                                              llh->llh_cat_idx);
 931                         if (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS))
 932                                 cd.lpcd_last_idx = cfs_fail_val;
 933                         else
 934                                 cd.lpcd_last_idx = 0;
 935                         rc = llog_process_or_fork(env, cat_llh, cat_cb,
 936                                                   &d, &cd, fork);
 937                         /* Reset the startcat becasue it has already reached
 938                          * catalog bottom.
 939                          */
 940                         startcat = 0;
 941                         d.lpd_startcat = 0;
 942                         if (rc != 0)
 943                                 RETURN(rc);
 944                 }
 945                 /* processing the catalog part at the begining */
 946                 cd.lpcd_first_idx = (startcat == LLOG_CAT_FIRST) ? 0 : startcat;
 947                 /* Note, the processing will stop at the lgh_last_idx value,
 948                  * and it could be increased during processing. So records
 949                  * between current lgh_last_idx and lgh_last_idx in future
 950                  * would left unprocessed.
 951                  */
 952                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
 953                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 954                                           &d, &cd, fork);
 955         } else {
 956                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 957                                           &d, NULL, fork);
 958         }
 959
 960         RETURN(rc);
 961 }
 962 EXPORT_SYMBOL(llog_cat_process_or_fork);
 963
 964 int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
 965                      llog_cb_t cb, void *data, int startcat, int startidx)
 966 {
 967         return llog_cat_process_or_fork(env, cat_llh, llog_cat_process_cb,
 968                                         cb, data, startcat, startidx, false);
 969 }
 970 EXPORT_SYMBOL(llog_cat_process);
 971
 972 static int llog_cat_size_cb(const struct lu_env *env,
 973                              struct llog_handle *cat_llh,
 974                              struct llog_rec_hdr *rec, void *data)
 975 {
 976         struct llog_process_data *d = data;
 977         struct llog_handle *llh = NULL;
 978         __u64 *cum_size = d->lpd_data;
 979         __u64 size;
 980         int rc;
 981
 982         ENTRY;
 983         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
 984
 985         if (rc == LLOG_DEL_PLAIN) {
 986                 /* empty log was deleted, don't count it */
 987                 rc = llog_cat_cleanup(env, cat_llh, llh,
 988                                       llh->u.phd.phd_cookie.lgc_index);
 989         } else if (rc == LLOG_DEL_RECORD) {
 990                 /* clear wrong catalog entry */
 991                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
 992         } else {
 993                 size = llog_size(env, llh);
 994                 *cum_size += size;
 995
 996                 CDEBUG(D_INFO, "Add llog entry "DFID" size=%llu, tot=%llu\n",
 997                        PFID(&llh->lgh_id.lgl_oi.oi_fid), size, *cum_size);
 998         }
 999
1000         if (llh != NULL)
1001                 llog_handle_put(env, llh);
1002
1003         RETURN(0);
1004 }
1005
1006 __u64 llog_cat_size(const struct lu_env *env, struct llog_handle *cat_llh)
1007 {
1008         __u64 size = llog_size(env, cat_llh);
1009
1010         llog_cat_process_or_fork(env, cat_llh, llog_cat_size_cb,
1011                                  NULL, &size, 0, 0, false);
1012
1013         return size;
1014 }
1015 EXPORT_SYMBOL(llog_cat_size);
1016
1017 /* currently returns the number of "free" entries in catalog,
1018  * ie the available entries for a new plain LLOG file creation,
1019  * even if catalog has wrapped
1020  */
1021 __u32 llog_cat_free_space(struct llog_handle *cat_llh)
1022 {
1023         /* simulate almost full Catalog */
1024         if (OBD_FAIL_CHECK(OBD_FAIL_CAT_FREE_RECORDS))
1025                 return cfs_fail_val;
1026
1027         if (cat_llh->lgh_hdr->llh_count == 1)
1028                 return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1;
1029
1030         if (cat_llh->lgh_last_idx > cat_llh->lgh_hdr->llh_cat_idx)
1031                 return LLOG_HDR_BITMAP_SIZE(cat_llh->lgh_hdr) - 1 +
1032                        cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
1033
1034         /* catalog is presently wrapped */
1035         return cat_llh->lgh_hdr->llh_cat_idx - cat_llh->lgh_last_idx;
1036 }
1037 EXPORT_SYMBOL(llog_cat_free_space);
1038
1039 static int llog_cat_reverse_process_cb(const struct lu_env *env,
1040                                        struct llog_handle *cat_llh,
1041                                        struct llog_rec_hdr *rec, void *data)
1042 {
1043         struct llog_process_data *d = data;
1044         struct llog_handle *llh;
1045         int rc;
1046
1047         ENTRY;
1048         rc = llog_cat_process_common(env, cat_llh, rec, &llh);
1049
1050         /* The empty plain log was destroyed while processing */
1051         if (rc == LLOG_DEL_PLAIN) {
1052                 rc = llog_cat_cleanup(env, cat_llh, llh,
1053                                       llh->u.phd.phd_cookie.lgc_index);
1054         } else if (rc == LLOG_DEL_RECORD) {
1055                 /* clear wrong catalog entry */
1056                 rc = llog_cat_cleanup(env, cat_llh, NULL, rec->lrh_index);
1057         }
1058         if (rc)
1059                 RETURN(rc);
1060
1061         rc = llog_reverse_process(env, llh, d->lpd_cb, d->lpd_data, NULL);
1062
1063         /* The empty plain was destroyed while processing */
1064         if (rc == LLOG_DEL_PLAIN)
1065                 rc = llog_cat_cleanup(env, cat_llh, llh,
1066                                       llh->u.phd.phd_cookie.lgc_index);
1067
1068         llog_handle_put(env, llh);
1069         RETURN(rc);
1070 }
1071
1072 int llog_cat_reverse_process(const struct lu_env *env,
1073                              struct llog_handle *cat_llh,
1074                              llog_cb_t cb, void *data)
1075 {
1076         struct llog_process_data d;
1077         struct llog_process_cat_data cd;
1078         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
1079         int rc;
1080         ENTRY;
1081
1082         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
1083         d.lpd_data = data;
1084         d.lpd_cb = cb;
1085
1086         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
1087             llh->llh_count > 1) {
1088                 CWARN("%s: catalog "DFID" crosses index zero\n",
1089                       cat_llh->lgh_ctxt->loc_obd->obd_name,
1090                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
1091
1092                 cd.lpcd_first_idx = 0;
1093                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
1094                 rc = llog_reverse_process(env, cat_llh,
1095                                           llog_cat_reverse_process_cb,
1096                                           &d, &cd);
1097                 if (rc != 0)
1098                         RETURN(rc);
1099
1100                 cd.lpcd_first_idx = le32_to_cpu(llh->llh_cat_idx);
1101                 cd.lpcd_last_idx = 0;
1102                 rc = llog_reverse_process(env, cat_llh,
1103                                           llog_cat_reverse_process_cb,
1104                                           &d, &cd);
1105         } else {
1106                 rc = llog_reverse_process(env, cat_llh,
1107                                           llog_cat_reverse_process_cb,
1108                                           &d, NULL);
1109         }
1110
1111         RETURN(rc);
1112 }
1113 EXPORT_SYMBOL(llog_cat_reverse_process);
1114
1115 static int llog_cat_set_first_idx(struct llog_handle *cathandle, int idx)
1116 {
1117         struct llog_log_hdr *llh = cathandle->lgh_hdr;
1118         int bitmap_size;
1119
1120         ENTRY;
1121
1122         bitmap_size = LLOG_HDR_BITMAP_SIZE(llh);
1123         /*
1124          * The llh_cat_idx equals to the first used index minus 1
1125          * so if we canceled the first index then llh_cat_idx
1126          * must be renewed.
1127          */
1128         if (llh->llh_cat_idx == (idx - 1)) {
1129                 llh->llh_cat_idx = idx;
1130
1131                 while (idx != cathandle->lgh_last_idx) {
1132                         idx = (idx + 1) % bitmap_size;
1133                         if (!test_bit_le(idx, LLOG_HDR_BITMAP(llh))) {
1134                                 /* update llh_cat_idx for each unset bit,
1135                                  * expecting the next one is set */
1136                                 llh->llh_cat_idx = idx;
1137                         } else if (idx == 0) {
1138                                 /* skip header bit */
1139                                 llh->llh_cat_idx = 0;
1140                                 continue;
1141                         } else {
1142                                 /* the first index is found */
1143                                 break;
1144                         }
1145                 }
1146
1147                 CDEBUG(D_HA, "catlog "DFID" first idx %u, last_idx %u\n",
1148                        PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
1149                        llh->llh_cat_idx, cathandle->lgh_last_idx);
1150         }
1151
1152         RETURN(0);
1153 }
1154
1155 /* Cleanup deleted plain llog traces from catalog */
1156 int llog_cat_cleanup(const struct lu_env *env, struct llog_handle *cathandle,
1157                      struct llog_handle *loghandle, int index)
1158 {
1159         int rc;
1160         struct lu_fid fid = {.f_seq = 0, .f_oid = 0, .f_ver = 0};
1161
1162         LASSERT(index);
1163         if (loghandle != NULL) {
1164                 /* remove destroyed llog from catalog list and
1165                  * chd_current_log variable */
1166                 fid = loghandle->lgh_id.lgl_oi.oi_fid;
1167                 down_write(&cathandle->lgh_lock);
1168                 if (cathandle->u.chd.chd_current_log == loghandle)
1169                         cathandle->u.chd.chd_current_log = NULL;
1170                 list_del_init(&loghandle->u.phd.phd_entry);
1171                 up_write(&cathandle->lgh_lock);
1172                 LASSERT(index == loghandle->u.phd.phd_cookie.lgc_index);
1173                 /* llog was opened and keep in a list, close it now */
1174                 llog_close(env, loghandle);
1175         }
1176
1177         /* do not attempt to cleanup on-disk llog if on client side */
1178         if (cathandle->lgh_obj == NULL)
1179                 return 0;
1180
1181         /* remove plain llog entry from catalog by index */
1182         llog_cat_set_first_idx(cathandle, index);
1183         rc = llog_cancel_rec(env, cathandle, index);
1184         if (rc == 0)
1185                 CDEBUG(D_HA,
1186                        "cancel plain log "DFID" at index %u of catalog "DFID"\n",
1187                        PFID(&fid), index,
1188                        PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
1189         return rc;
1190 }