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, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/obdclass/llog_cat.c
  33  *
  34  * OST<->MDS recovery logging infrastructure.
  35  *
  36  * Invariants in implementation:
  37  * - we do not share logs among different OST<->MDS connections, so that
  38  *   if an OST or MDS fails it need only look at log(s) relevant to itself
  39  *
  40  * Author: Andreas Dilger <adilger@clusterfs.com>
  41  * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
  42  * Author: Mikhail Pershin <mike.pershin@intel.com>
  43  */
  44
  45 #define DEBUG_SUBSYSTEM S_LOG
  46
  47
  48 #include <obd_class.h>
  49
  50 #include "llog_internal.h"
  51
  52 /* Create a new log handle and add it to the open list.
  53  * This log handle will be closed when all of the records in it are removed.
  54  *
  55  * Assumes caller has already pushed us into the kernel context and is locking.
  56  */
  57 static int llog_cat_new_log(const struct lu_env *env,
  58                             struct llog_handle *cathandle,
  59                             struct llog_handle *loghandle,
  60                             struct thandle *th)
  61 {
  62         struct llog_thread_info *lgi = llog_info(env);
  63         struct llog_logid_rec   *rec = &lgi->lgi_logid;
  64         struct thandle *handle = NULL;
  65         struct dt_device *dt = NULL;
  66         struct llog_log_hdr     *llh = cathandle->lgh_hdr;
  67         int                      rc, index;
  68
  69         ENTRY;
  70
  71         index = (cathandle->lgh_last_idx + 1) %
  72                 (OBD_FAIL_PRECHECK(OBD_FAIL_CAT_RECORDS) ? (cfs_fail_val + 1) :
  73                                                 LLOG_HDR_BITMAP_SIZE(llh));
  74
  75         /* check that new llog index will not overlap with the first one.
  76          * - llh_cat_idx is the index just before the first/oldest still in-use
  77          *      index in catalog
  78          * - lgh_last_idx is the last/newest used index in catalog
  79          *
  80          * When catalog is not wrapped yet then lgh_last_idx is always larger
  81          * than llh_cat_idx. After the wrap around lgh_last_idx re-starts
  82          * from 0 and llh_cat_idx becomes the upper limit for it
  83          *
  84          * Check if catalog has already wrapped around or not by comparing
  85          * last_idx and cat_idx */
  86         if ((index == llh->llh_cat_idx + 1 && llh->llh_count > 1) ||
  87             (index == 0 && llh->llh_cat_idx == 0)) {
  88                 if (cathandle->lgh_name == NULL) {
  89                         CWARN("%s: there are no more free slots in catalog "
  90                               DFID":%x\n",
  91                               loghandle->lgh_ctxt->loc_obd->obd_name,
  92                               PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
  93                               cathandle->lgh_id.lgl_ogen);
  94                 } else {
  95                         CWARN("%s: there are no more free slots in "
  96                               "catalog %s\n",
  97                               loghandle->lgh_ctxt->loc_obd->obd_name,
  98                               cathandle->lgh_name);
  99                 }
 100                 RETURN(-ENOSPC);
 101         }
 102
 103         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED))
 104                 RETURN(-ENOSPC);
 105
 106         if (loghandle->lgh_hdr != NULL) {
 107                 /* If llog object is remote and creation is failed, lgh_hdr
 108                  * might be left over here, free it first */
 109                 LASSERT(!llog_exist(loghandle));
 110                 OBD_FREE_LARGE(loghandle->lgh_hdr, loghandle->lgh_hdr_size);
 111                 loghandle->lgh_hdr = NULL;
 112         }
 113
 114         if (th == NULL) {
 115                 dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 116
 117                 handle = dt_trans_create(env, dt);
 118                 if (IS_ERR(handle))
 119                         RETURN(PTR_ERR(handle));
 120
 121                 /* Create update llog object synchronously, which
 122                  * happens during inialization process see
 123                  * lod_sub_prep_llog(), to make sure the update
 124                  * llog object is created before corss-MDT writing
 125                  * updates into the llog object */
 126                 if (cathandle->lgh_ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID)
 127                         handle->th_sync = 1;
 128
 129                 handle->th_wait_submit = 1;
 130
 131                 rc = llog_declare_create(env, loghandle, handle);
 132                 if (rc != 0)
 133                         GOTO(out, rc);
 134
 135                 rec->lid_hdr.lrh_len = sizeof(*rec);
 136                 rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 137                 rec->lid_id = loghandle->lgh_id;
 138                 rc = llog_declare_write_rec(env, cathandle, &rec->lid_hdr, -1,
 139                                             handle);
 140                 if (rc != 0)
 141                         GOTO(out, rc);
 142
 143                 rc = dt_trans_start_local(env, dt, handle);
 144                 if (rc != 0)
 145                         GOTO(out, rc);
 146
 147                 th = handle;
 148         }
 149
 150         rc = llog_create(env, loghandle, th);
 151         /* if llog is already created, no need to initialize it */
 152         if (rc == -EEXIST) {
 153                 GOTO(out, rc = 0);
 154         } else if (rc != 0) {
 155                 CERROR("%s: can't create new plain llog in catalog: rc = %d\n",
 156                        loghandle->lgh_ctxt->loc_obd->obd_name, rc);
 157                 GOTO(out, rc);
 158         }
 159
 160         rc = llog_init_handle(env, loghandle,
 161                               LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
 162                               &cathandle->lgh_hdr->llh_tgtuuid);
 163         if (rc < 0)
 164                 GOTO(out, rc);
 165
 166         /* build the record for this log in the catalog */
 167         rec->lid_hdr.lrh_len = sizeof(*rec);
 168         rec->lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
 169         rec->lid_id = loghandle->lgh_id;
 170
 171         /* append the new record into catalog. The new index will be
 172          * assigned to the record and updated in rec header */
 173         rc = llog_write_rec(env, cathandle, &rec->lid_hdr,
 174                             &loghandle->u.phd.phd_cookie, LLOG_NEXT_IDX, th);
 175         if (rc < 0)
 176                 GOTO(out_destroy, rc);
 177
 178         CDEBUG(D_OTHER, "new plain log "DFID".%u of catalog "DFID"\n",
 179                PFID(&loghandle->lgh_id.lgl_oi.oi_fid), rec->lid_hdr.lrh_index,
 180                PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
 181
 182         loghandle->lgh_hdr->llh_cat_idx = rec->lid_hdr.lrh_index;
 183
 184         /* limit max size of plain llog so that space can be
 185          * released sooner, especially on small filesystems */
 186         /* 2MB for the cases when free space hasn't been learned yet */
 187         loghandle->lgh_max_size = 2 << 20;
 188         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 189         rc = dt_statfs(env, dt, &lgi->lgi_statfs);
 190         if (rc == 0 && lgi->lgi_statfs.os_bfree > 0) {
 191                 __u64 freespace = (lgi->lgi_statfs.os_bfree *
 192                                   lgi->lgi_statfs.os_bsize) >> 6;
 193                 if (freespace < loghandle->lgh_max_size)
 194                         loghandle->lgh_max_size = freespace;
 195                 /* shouldn't be > 128MB in any case?
 196                  * it's 256K records of 512 bytes each */
 197                 if (freespace > (128 << 20))
 198                         loghandle->lgh_max_size = 128 << 20;
 199         }
 200         rc = 0;
 201
 202 out:
 203         if (handle != NULL) {
 204                 handle->th_result = rc >= 0 ? 0 : rc;
 205                 dt_trans_stop(env, dt, handle);
 206         }
 207         RETURN(rc);
 208
 209 out_destroy:
 210         /* to signal llog_cat_close() it shouldn't try to destroy the llog,
 211          * we want to destroy it in this transaction, otherwise the object
 212          * becomes an orphan */
 213         loghandle->lgh_hdr->llh_flags &= ~LLOG_F_ZAP_WHEN_EMPTY;
 214         /* this is to mimic full log, so another llog_cat_current_log()
 215          * can skip it and ask for another onet */
 216         loghandle->lgh_last_idx = LLOG_HDR_BITMAP_SIZE(llh) + 1;
 217         llog_trans_destroy(env, loghandle, th);
 218         RETURN(rc);
 219 }
 220
 221 /* Open an existent log handle and add it to the open list.
 222  * This log handle will be closed when all of the records in it are removed.
 223  *
 224  * Assumes caller has already pushed us into the kernel context and is locking.
 225  * We return a lock on the handle to ensure nobody yanks it from us.
 226  *
 227  * This takes extra reference on llog_handle via llog_handle_get() and require
 228  * this reference to be put by caller using llog_handle_put()
 229  */
 230 int llog_cat_id2handle(const struct lu_env *env, struct llog_handle *cathandle,
 231                        struct llog_handle **res, struct llog_logid *logid)
 232 {
 233         struct llog_handle      *loghandle;
 234         enum llog_flag           fmt;
 235         int                      rc = 0;
 236
 237         ENTRY;
 238
 239         if (cathandle == NULL)
 240                 RETURN(-EBADF);
 241
 242         fmt = cathandle->lgh_hdr->llh_flags & LLOG_F_EXT_MASK;
 243         down_write(&cathandle->lgh_lock);
 244         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 245                             u.phd.phd_entry) {
 246                 struct llog_logid *cgl = &loghandle->lgh_id;
 247
 248                 if (ostid_id(&cgl->lgl_oi) == ostid_id(&logid->lgl_oi) &&
 249                     ostid_seq(&cgl->lgl_oi) == ostid_seq(&logid->lgl_oi)) {
 250                         if (cgl->lgl_ogen != logid->lgl_ogen) {
 251                                 CWARN("%s: log "DFID" generation %x != %x\n",
 252                                       loghandle->lgh_ctxt->loc_obd->obd_name,
 253                                       PFID(&logid->lgl_oi.oi_fid),
 254                                       cgl->lgl_ogen, logid->lgl_ogen);
 255                                 continue;
 256                         }
 257                         loghandle->u.phd.phd_cat_handle = cathandle;
 258                         up_write(&cathandle->lgh_lock);
 259                         GOTO(out, rc = 0);
 260                 }
 261         }
 262         up_write(&cathandle->lgh_lock);
 263
 264         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle, logid, NULL,
 265                        LLOG_OPEN_EXISTS);
 266         if (rc < 0) {
 267                 CERROR("%s: error opening log id "DFID":%x: rc = %d\n",
 268                        cathandle->lgh_ctxt->loc_obd->obd_name,
 269                        PFID(&logid->lgl_oi.oi_fid), logid->lgl_ogen, rc);
 270                 RETURN(rc);
 271         }
 272
 273         rc = llog_init_handle(env, loghandle, LLOG_F_IS_PLAIN | fmt, NULL);
 274         if (rc < 0) {
 275                 llog_close(env, loghandle);
 276                 loghandle = NULL;
 277                 RETURN(rc);
 278         }
 279
 280         down_write(&cathandle->lgh_lock);
 281         list_add_tail(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head);
 282         up_write(&cathandle->lgh_lock);
 283
 284         loghandle->u.phd.phd_cat_handle = cathandle;
 285         loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id;
 286         loghandle->u.phd.phd_cookie.lgc_index =
 287                                 loghandle->lgh_hdr->llh_cat_idx;
 288         EXIT;
 289 out:
 290         llog_handle_get(loghandle);
 291         *res = loghandle;
 292         return 0;
 293 }
 294
 295 int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle)
 296 {
 297         struct llog_handle      *loghandle, *n;
 298         int                      rc;
 299
 300         ENTRY;
 301
 302         list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
 303                                  u.phd.phd_entry) {
 304                 struct llog_log_hdr     *llh = loghandle->lgh_hdr;
 305                 int                      index;
 306
 307                 /* unlink open-not-created llogs */
 308                 list_del_init(&loghandle->u.phd.phd_entry);
 309                 llh = loghandle->lgh_hdr;
 310                 if (loghandle->lgh_obj != NULL && llh != NULL &&
 311                     (llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 312                     (llh->llh_count == 1)) {
 313                         rc = llog_destroy(env, loghandle);
 314                         if (rc)
 315                                 CERROR("%s: failure destroying log during "
 316                                        "cleanup: rc = %d\n",
 317                                        loghandle->lgh_ctxt->loc_obd->obd_name,
 318                                        rc);
 319
 320                         index = loghandle->u.phd.phd_cookie.lgc_index;
 321                         llog_cat_cleanup(env, cathandle, NULL, index);
 322                 }
 323                 llog_close(env, loghandle);
 324         }
 325         /* if handle was stored in ctxt, remove it too */
 326         if (cathandle->lgh_ctxt->loc_handle == cathandle)
 327                 cathandle->lgh_ctxt->loc_handle = NULL;
 328         rc = llog_close(env, cathandle);
 329         RETURN(rc);
 330 }
 331 EXPORT_SYMBOL(llog_cat_close);
 332
 333 /**
 334  * lockdep markers for nested struct llog_handle::lgh_lock locking.
 335  */
 336 enum {
 337         LLOGH_CAT,
 338         LLOGH_LOG
 339 };
 340
 341 /** Return the currently active log handle.  If the current log handle doesn't
 342  * have enough space left for the current record, start a new one.
 343  *
 344  * If reclen is 0, we only want to know what the currently active log is,
 345  * otherwise we get a lock on this log so nobody can steal our space.
 346  *
 347  * Assumes caller has already pushed us into the kernel context and is locking.
 348  *
 349  * NOTE: loghandle is write-locked upon successful return
 350  */
 351 static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle,
 352                                                 struct thandle *th)
 353 {
 354         struct llog_handle *loghandle = NULL;
 355         ENTRY;
 356
 357
 358         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED2)) {
 359                 down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 360                 GOTO(next, loghandle);
 361         }
 362
 363         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 364         loghandle = cathandle->u.chd.chd_current_log;
 365         if (loghandle) {
 366                 struct llog_log_hdr *llh;
 367
 368                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 369                 llh = loghandle->lgh_hdr;
 370                 if (llh == NULL || !llog_is_full(loghandle)) {
 371                         up_read(&cathandle->lgh_lock);
 372                         RETURN(loghandle);
 373                 } else {
 374                         up_write(&loghandle->lgh_lock);
 375                 }
 376         }
 377         up_read(&cathandle->lgh_lock);
 378
 379         /* time to use next log */
 380
 381         /* first, we have to make sure the state hasn't changed */
 382         down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
 383         loghandle = cathandle->u.chd.chd_current_log;
 384         if (loghandle) {
 385                 struct llog_log_hdr *llh;
 386
 387                 down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 388                 llh = loghandle->lgh_hdr;
 389                 if (llh == NULL || !llog_is_full(loghandle))
 390                         GOTO(out_unlock, loghandle);
 391                 else
 392                         up_write(&loghandle->lgh_lock);
 393         }
 394
 395 next:
 396         /* Sigh, the chd_next_log and chd_current_log is initialized
 397          * in declare phase, and we do not serialize the catlog
 398          * accessing, so it might be possible the llog creation
 399          * thread (see llog_cat_declare_add_rec()) did not create
 400          * llog successfully, then the following thread might
 401          * meet this situation. */
 402         if (IS_ERR_OR_NULL(cathandle->u.chd.chd_next_log)) {
 403                 CERROR("%s: next log does not exist!\n",
 404                        cathandle->lgh_ctxt->loc_obd->obd_name);
 405                 loghandle = ERR_PTR(-EIO);
 406                 if (cathandle->u.chd.chd_next_log == NULL) {
 407                         /* Store the error in chd_next_log, so
 408                          * the following process can get correct
 409                          * failure value */
 410                         cathandle->u.chd.chd_next_log = loghandle;
 411                 }
 412                 GOTO(out_unlock, loghandle);
 413         }
 414
 415         CDEBUG(D_INODE, "use next log\n");
 416
 417         loghandle = cathandle->u.chd.chd_next_log;
 418         cathandle->u.chd.chd_current_log = loghandle;
 419         cathandle->u.chd.chd_next_log = NULL;
 420         down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 421
 422 out_unlock:
 423         up_write(&cathandle->lgh_lock);
 424         LASSERT(loghandle);
 425         RETURN(loghandle);
 426 }
 427
 428 static int llog_cat_update_header(const struct lu_env *env,
 429                            struct llog_handle *cathandle)
 430 {
 431         struct llog_handle *loghandle;
 432         int rc;
 433         ENTRY;
 434
 435         /* refresh llog */
 436         down_write(&cathandle->lgh_lock);
 437         if (!cathandle->lgh_stale) {
 438                 up_write(&cathandle->lgh_lock);
 439                 RETURN(0);
 440         }
 441         list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
 442                             u.phd.phd_entry) {
 443                 if (!llog_exist(loghandle))
 444                         continue;
 445
 446                 rc = llog_read_header(env, loghandle, NULL);
 447                 if (rc != 0) {
 448                         up_write(&cathandle->lgh_lock);
 449                         GOTO(out, rc);
 450                 }
 451         }
 452         rc = llog_read_header(env, cathandle, NULL);
 453         if (rc == 0)
 454                 cathandle->lgh_stale = 0;
 455         up_write(&cathandle->lgh_lock);
 456         if (rc != 0)
 457                 GOTO(out, rc);
 458 out:
 459         RETURN(rc);
 460 }
 461
 462 /* Add a single record to the recovery log(s) using a catalog
 463  * Returns as llog_write_record
 464  *
 465  * Assumes caller has already pushed us into the kernel context.
 466  */
 467 int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle,
 468                      struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
 469                      struct thandle *th)
 470 {
 471         struct llog_handle *loghandle;
 472         int rc, retried = 0;
 473         ENTRY;
 474
 475         LASSERT(rec->lrh_len <= cathandle->lgh_ctxt->loc_chunk_size);
 476
 477 retry:
 478         loghandle = llog_cat_current_log(cathandle, th);
 479         if (IS_ERR(loghandle))
 480                 RETURN(PTR_ERR(loghandle));
 481
 482         /* loghandle is already locked by llog_cat_current_log() for us */
 483         if (!llog_exist(loghandle)) {
 484                 rc = llog_cat_new_log(env, cathandle, loghandle, th);
 485                 if (rc < 0) {
 486                         up_write(&loghandle->lgh_lock);
 487                         /* nobody should be trying to use this llog */
 488                         down_write(&cathandle->lgh_lock);
 489                         /* only reset current log if still room in catalog, to
 490                          * avoid unnecessarily and racy creation of new and
 491                          * partially initialized llog_handle
 492                          */
 493                         if ((cathandle->u.chd.chd_current_log == loghandle) &&
 494                             rc != -ENOSPC)
 495                                 cathandle->u.chd.chd_current_log = NULL;
 496                         up_write(&cathandle->lgh_lock);
 497                         RETURN(rc);
 498                 }
 499         }
 500         /* now let's try to add the record */
 501         rc = llog_write_rec(env, loghandle, rec, reccookie, LLOG_NEXT_IDX, th);
 502         if (rc < 0) {
 503                 CDEBUG_LIMIT(rc == -ENOSPC ? D_HA : D_ERROR,
 504                              "llog_write_rec %d: lh=%p\n", rc, loghandle);
 505                 /* -ENOSPC is returned if no empty records left
 506                  * and when it's lack of space on the stogage.
 507                  * there is no point to try again if it's the second
 508                  * case. many callers (like llog test) expect ENOSPC,
 509                  * so we preserve this error code, but look for the
 510                  * actual cause here */
 511                 if (rc == -ENOSPC && llog_is_full(loghandle))
 512                         rc = -ENOBUFS;
 513         }
 514         up_write(&loghandle->lgh_lock);
 515
 516         if (rc == -ENOBUFS) {
 517                 if (retried++ == 0)
 518                         GOTO(retry, rc);
 519                 CERROR("%s: error on 2nd llog: rc = %d\n",
 520                        cathandle->lgh_ctxt->loc_obd->obd_name, rc);
 521         }
 522
 523         RETURN(rc);
 524 }
 525 EXPORT_SYMBOL(llog_cat_add_rec);
 526
 527 int llog_cat_declare_add_rec(const struct lu_env *env,
 528                              struct llog_handle *cathandle,
 529                              struct llog_rec_hdr *rec, struct thandle *th)
 530 {
 531         struct llog_thread_info *lgi = llog_info(env);
 532         struct llog_logid_rec   *lirec = &lgi->lgi_logid;
 533         struct llog_handle      *loghandle, *next;
 534         int                      rc = 0;
 535
 536         ENTRY;
 537
 538         if (cathandle->u.chd.chd_current_log == NULL) {
 539                 /* declare new plain llog */
 540                 down_write(&cathandle->lgh_lock);
 541                 if (cathandle->u.chd.chd_current_log == NULL) {
 542                         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle,
 543                                        NULL, NULL, LLOG_OPEN_NEW);
 544                         if (rc == 0) {
 545                                 cathandle->u.chd.chd_current_log = loghandle;
 546                                 list_add_tail(&loghandle->u.phd.phd_entry,
 547                                               &cathandle->u.chd.chd_head);
 548                         }
 549                 }
 550                 up_write(&cathandle->lgh_lock);
 551         } else if (cathandle->u.chd.chd_next_log == NULL ||
 552                    IS_ERR(cathandle->u.chd.chd_next_log)) {
 553                 /* declare next plain llog */
 554                 down_write(&cathandle->lgh_lock);
 555                 if (cathandle->u.chd.chd_next_log == NULL ||
 556                     IS_ERR(cathandle->u.chd.chd_next_log)) {
 557                         rc = llog_open(env, cathandle->lgh_ctxt, &loghandle,
 558                                        NULL, NULL, LLOG_OPEN_NEW);
 559                         if (rc == 0) {
 560                                 cathandle->u.chd.chd_next_log = loghandle;
 561                                 list_add_tail(&loghandle->u.phd.phd_entry,
 562                                               &cathandle->u.chd.chd_head);
 563                         }
 564                 }
 565                 up_write(&cathandle->lgh_lock);
 566         }
 567         if (rc)
 568                 GOTO(out, rc);
 569
 570         lirec->lid_hdr.lrh_len = sizeof(*lirec);
 571
 572         if (!llog_exist(cathandle->u.chd.chd_current_log)) {
 573                 if (dt_object_remote(cathandle->lgh_obj)) {
 574                         /* For remote operation, if we put the llog object
 575                          * creation in the current transaction, then the
 576                          * llog object will not be created on the remote
 577                          * target until the transaction stop, if other
 578                          * operations start before the transaction stop,
 579                          * and use the same llog object, will be dependent
 580                          * on the success of this transaction. So let's
 581                          * create the llog object synchronously here to
 582                          * remove the dependency. */
 583 create_again:
 584                         down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
 585                         loghandle = cathandle->u.chd.chd_current_log;
 586                         down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
 587                         if (cathandle->lgh_stale) {
 588                                 up_write(&loghandle->lgh_lock);
 589                                 up_read(&cathandle->lgh_lock);
 590                                 GOTO(out, rc = -EIO);
 591                         }
 592                         if (!llog_exist(loghandle)) {
 593                                 rc = llog_cat_new_log(env, cathandle, loghandle,
 594                                                       NULL);
 595                                 if (rc == -ESTALE)
 596                                         cathandle->lgh_stale = 1;
 597                         }
 598                         up_write(&loghandle->lgh_lock);
 599                         up_read(&cathandle->lgh_lock);
 600                         if (rc == -ESTALE) {
 601                                 rc = llog_cat_update_header(env, cathandle);
 602                                 if (rc != 0)
 603                                         GOTO(out, rc);
 604                                 goto create_again;
 605                         } else if (rc < 0) {
 606                                 GOTO(out, rc);
 607                         }
 608                 } else {
 609                         rc = llog_declare_create(env,
 610                                         cathandle->u.chd.chd_current_log, th);
 611                         if (rc)
 612                                 GOTO(out, rc);
 613                         llog_declare_write_rec(env, cathandle,
 614                                                &lirec->lid_hdr, -1, th);
 615                 }
 616         }
 617
 618 write_again:
 619         /* declare records in the llogs */
 620         rc = llog_declare_write_rec(env, cathandle->u.chd.chd_current_log,
 621                                     rec, -1, th);
 622         if (rc == -ESTALE) {
 623                 down_write(&cathandle->lgh_lock);
 624                 if (cathandle->lgh_stale) {
 625                         up_write(&cathandle->lgh_lock);
 626                         GOTO(out, rc = -EIO);
 627                 }
 628
 629                 cathandle->lgh_stale = 1;
 630                 up_write(&cathandle->lgh_lock);
 631                 rc = llog_cat_update_header(env, cathandle);
 632                 if (rc != 0)
 633                         GOTO(out, rc);
 634                 goto write_again;
 635         } else if (rc < 0) {
 636                 GOTO(out, rc);
 637         }
 638
 639         next = cathandle->u.chd.chd_next_log;
 640         if (!IS_ERR_OR_NULL(next)) {
 641                 if (!llog_exist(next)) {
 642                         if (dt_object_remote(cathandle->lgh_obj)) {
 643                                 /* For remote operation, if we put the llog
 644                                  * object creation in the current transaction,
 645                                  * then the llog object will not be created on
 646                                  * the remote target until the transaction stop,
 647                                  * if other operations start before the
 648                                  * transaction stop, and use the same llog
 649                                  * object, will be dependent on the success of
 650                                  * this transaction. So let's create the llog
 651                                  * object synchronously here to remove the
 652                                  * dependency. */
 653                                 down_write_nested(&cathandle->lgh_lock,
 654                                                  LLOGH_CAT);
 655                                 next = cathandle->u.chd.chd_next_log;
 656                                 if (IS_ERR_OR_NULL(next)) {
 657                                         /* Sigh, another thread just tried,
 658                                          * let's fail as well */
 659                                         up_write(&cathandle->lgh_lock);
 660                                         if (next == NULL)
 661                                                 rc = -EIO;
 662                                         else
 663                                                 rc = PTR_ERR(next);
 664                                         GOTO(out, rc);
 665                                 }
 666
 667                                 down_write_nested(&next->lgh_lock, LLOGH_LOG);
 668                                 if (!llog_exist(next)) {
 669                                         rc = llog_cat_new_log(env, cathandle,
 670                                                               next, NULL);
 671                                         if (rc < 0)
 672                                                 cathandle->u.chd.chd_next_log =
 673                                                                 ERR_PTR(rc);
 674                                 }
 675                                 up_write(&next->lgh_lock);
 676                                 up_write(&cathandle->lgh_lock);
 677                                 if (rc < 0)
 678                                         GOTO(out, rc);
 679                         } else {
 680                                 rc = llog_declare_create(env, next, th);
 681                                 llog_declare_write_rec(env, cathandle,
 682                                                 &lirec->lid_hdr, -1, th);
 683                         }
 684                 }
 685                 /* XXX: we hope for declarations made for existing llog
 686                  *      this might be not correct with some backends
 687                  *      where declarations are expected against specific
 688                  *      object like ZFS with full debugging enabled */
 689                 /*llog_declare_write_rec(env, next, rec, -1, th);*/
 690         }
 691 out:
 692         RETURN(rc);
 693 }
 694 EXPORT_SYMBOL(llog_cat_declare_add_rec);
 695
 696 int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
 697                  struct llog_rec_hdr *rec, struct llog_cookie *reccookie)
 698 {
 699         struct llog_ctxt        *ctxt;
 700         struct dt_device        *dt;
 701         struct thandle          *th = NULL;
 702         int                      rc;
 703
 704         ctxt = cathandle->lgh_ctxt;
 705         LASSERT(ctxt);
 706         LASSERT(ctxt->loc_exp);
 707
 708         LASSERT(cathandle->lgh_obj != NULL);
 709         dt = lu2dt_dev(cathandle->lgh_obj->do_lu.lo_dev);
 710
 711         th = dt_trans_create(env, dt);
 712         if (IS_ERR(th))
 713                 RETURN(PTR_ERR(th));
 714
 715         rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
 716         if (rc)
 717                 GOTO(out_trans, rc);
 718
 719         rc = dt_trans_start_local(env, dt, th);
 720         if (rc)
 721                 GOTO(out_trans, rc);
 722         rc = llog_cat_add_rec(env, cathandle, rec, reccookie, th);
 723 out_trans:
 724         dt_trans_stop(env, dt, th);
 725         RETURN(rc);
 726 }
 727 EXPORT_SYMBOL(llog_cat_add);
 728
 729 /* For each cookie in the cookie array, we clear the log in-use bit and either:
 730  * - the log is empty, so mark it free in the catalog header and delete it
 731  * - the log is not empty, just write out the log header
 732  *
 733  * The cookies may be in different log files, so we need to get new logs
 734  * each time.
 735  *
 736  * Assumes caller has already pushed us into the kernel context.
 737  */
 738 int llog_cat_cancel_records(const struct lu_env *env,
 739                             struct llog_handle *cathandle, int count,
 740                             struct llog_cookie *cookies)
 741 {
 742         int i, index, rc = 0, failed = 0;
 743
 744         ENTRY;
 745
 746         for (i = 0; i < count; i++, cookies++) {
 747                 struct llog_handle *loghandle;
 748                 struct llog_logid *lgl = &cookies->lgc_lgl;
 749                 int  lrc;
 750
 751                 rc = llog_cat_id2handle(env, cathandle, &loghandle, lgl);
 752                 if (rc) {
 753                         CDEBUG(D_HA, "%s: cannot find llog for handle "DFID":%x"
 754                                ": rc = %d\n",
 755                                cathandle->lgh_ctxt->loc_obd->obd_name,
 756                                PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, rc);
 757                         failed++;
 758                         continue;
 759                 }
 760
 761                 if ((cathandle->lgh_ctxt->loc_flags &
 762                      LLOG_CTXT_FLAG_NORMAL_FID) && !llog_exist(loghandle)) {
 763                         /* For update log, some of loghandles of cathandle
 764                          * might not exist because remote llog creation might
 765                          * be failed, so let's skip the record cancellation
 766                          * for these non-exist llogs.
 767                          */
 768                         lrc = -ENOENT;
 769                         CDEBUG(D_HA, "%s: llog "DFID":%x does not exist"
 770                                ": rc = %d\n",
 771                                cathandle->lgh_ctxt->loc_obd->obd_name,
 772                                PFID(&lgl->lgl_oi.oi_fid), lgl->lgl_ogen, lrc);
 773                         failed++;
 774                         if (rc == 0)
 775                                 rc = lrc;
 776                         continue;
 777                 }
 778
 779                 lrc = llog_cancel_rec(env, loghandle, cookies->lgc_index);
 780                 if (lrc == LLOG_DEL_PLAIN) { /* log has been destroyed */
 781                         index = loghandle->u.phd.phd_cookie.lgc_index;
 782                         lrc = llog_cat_cleanup(env, cathandle, loghandle,
 783                                                index);
 784                         if (rc == 0)
 785                                 rc = lrc;
 786                 } else if (lrc == -ENOENT) {
 787                         if (rc == 0) /* ENOENT shouldn't rewrite any error */
 788                                 rc = lrc;
 789                 } else if (lrc < 0) {
 790                         failed++;
 791                         if (rc == 0)
 792                                 rc = lrc;
 793                 }
 794                 llog_handle_put(loghandle);
 795         }
 796         if (rc)
 797                 CERROR("%s: fail to cancel %d of %d llog-records: rc = %d\n",
 798                        cathandle->lgh_ctxt->loc_obd->obd_name, failed, count,
 799                        rc);
 800
 801         RETURN(rc);
 802 }
 803 EXPORT_SYMBOL(llog_cat_cancel_records);
 804
 805 static int llog_cat_process_cb(const struct lu_env *env,
 806                                struct llog_handle *cat_llh,
 807                                struct llog_rec_hdr *rec, void *data)
 808 {
 809         struct llog_process_data *d = data;
 810         struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
 811         struct llog_handle *llh;
 812         struct llog_log_hdr *hdr;
 813         int rc;
 814
 815         ENTRY;
 816         if (rec->lrh_type != LLOG_LOGID_MAGIC) {
 817                 CERROR("invalid record in catalog\n");
 818                 RETURN(-EINVAL);
 819         }
 820         CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "
 821                DFID"\n", PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
 822                rec->lrh_index, PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 823
 824         rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id);
 825         if (rc) {
 826                 CERROR("%s: cannot find handle for llog "DFID": rc = %d\n",
 827                        cat_llh->lgh_ctxt->loc_obd->obd_name,
 828                        PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
 829                 if (rc == -ENOENT || rc == -ESTALE) {
 830                         /* After a server crash, a stub of index
 831                          * record in catlog could be kept, because
 832                          * plain log destroy + catlog index record
 833                          * deletion are not atomic. So we end up with
 834                          * an index but no actual record. Destroy the
 835                          * index and move on. */
 836                         rc = llog_cat_cleanup(env, cat_llh, NULL,
 837                                               rec->lrh_index);
 838                 }
 839
 840                 RETURN(rc);
 841         }
 842
 843         /* clean old empty llogs, do not consider current llog in use */
 844         /* ignore remote (lgh_obj=NULL) llogs */
 845         hdr = llh->lgh_hdr;
 846         if ((hdr->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
 847             hdr->llh_count == 1 && cat_llh->lgh_obj != NULL &&
 848             llh != cat_llh->u.chd.chd_current_log) {
 849                 rc = llog_destroy(env, llh);
 850                 if (rc)
 851                         CERROR("%s: fail to destroy empty log: rc = %d\n",
 852                                llh->lgh_ctxt->loc_obd->obd_name, rc);
 853                 GOTO(out, rc = LLOG_DEL_PLAIN);
 854         }
 855
 856         if (rec->lrh_index < d->lpd_startcat) {
 857                 /* Skip processing of the logs until startcat */
 858                 rc = 0;
 859         } else if (d->lpd_startidx > 0) {
 860                 struct llog_process_cat_data cd;
 861
 862                 cd.lpcd_first_idx = d->lpd_startidx;
 863                 cd.lpcd_last_idx = 0;
 864                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 865                                           &cd, false);
 866                 /* Continue processing the next log from idx 0 */
 867                 d->lpd_startidx = 0;
 868         } else {
 869                 rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data,
 870                                           NULL, false);
 871         }
 872
 873 out:
 874         /* The empty plain log was destroyed while processing */
 875         if (rc == LLOG_DEL_PLAIN)
 876                 rc = llog_cat_cleanup(env, cat_llh, llh,
 877                                       llh->u.phd.phd_cookie.lgc_index);
 878         llog_handle_put(llh);
 879
 880         RETURN(rc);
 881 }
 882
 883 int llog_cat_process_or_fork(const struct lu_env *env,
 884                              struct llog_handle *cat_llh, llog_cb_t cat_cb,
 885                              llog_cb_t cb, void *data, int startcat,
 886                              int startidx, bool fork)
 887 {
 888         struct llog_process_data d;
 889         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
 890         int rc;
 891         ENTRY;
 892
 893         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
 894         d.lpd_data = data;
 895         d.lpd_cb = cb;
 896         d.lpd_startcat = startcat;
 897         d.lpd_startidx = startidx;
 898
 899         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
 900             llh->llh_count > 1) {
 901                 struct llog_process_cat_data cd;
 902
 903                 CWARN("%s: catlog "DFID" crosses index zero\n",
 904                       cat_llh->lgh_ctxt->loc_obd->obd_name,
 905                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 906
 907                 cd.lpcd_first_idx = llh->llh_cat_idx;
 908                 cd.lpcd_last_idx = 0;
 909                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 910                                           &d, &cd, fork);
 911                 if (rc != 0)
 912                         RETURN(rc);
 913
 914                 cd.lpcd_first_idx = 0;
 915                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
 916                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 917                                           &d, &cd, fork);
 918         } else {
 919                 rc = llog_process_or_fork(env, cat_llh, cat_cb,
 920                                           &d, NULL, fork);
 921         }
 922
 923         RETURN(rc);
 924 }
 925
 926 int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
 927                      llog_cb_t cb, void *data, int startcat, int startidx)
 928 {
 929         return llog_cat_process_or_fork(env, cat_llh, llog_cat_process_cb,
 930                                         cb, data, startcat, startidx, false);
 931 }
 932 EXPORT_SYMBOL(llog_cat_process);
 933
 934 static int llog_cat_size_cb(const struct lu_env *env,
 935                              struct llog_handle *cat_llh,
 936                              struct llog_rec_hdr *rec, void *data)
 937 {
 938         struct llog_process_data *d = data;
 939         struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
 940         struct llog_handle *llh;
 941         int rc;
 942         __u64 *cum_size = d->lpd_data;
 943         __u64 size;
 944
 945         ENTRY;
 946         if (rec->lrh_type != LLOG_LOGID_MAGIC) {
 947                 CERROR("%s: invalid record in catalog, rc = %d\n",
 948                        cat_llh->lgh_ctxt->loc_obd->obd_name, -EINVAL);
 949                 RETURN(-EINVAL);
 950         }
 951         CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "
 952                DFID"\n", PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
 953                rec->lrh_index, PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
 954
 955         rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id);
 956         if (rc) {
 957                 CWARN("%s: cannot find handle for llog "DFID": rc = %d\n",
 958                       cat_llh->lgh_ctxt->loc_obd->obd_name,
 959                       PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
 960                 RETURN(0);
 961         }
 962         size = llog_size(env, llh);
 963         *cum_size += size;
 964
 965         CDEBUG(D_INFO, "Add llog entry "DFID" size %llu\n",
 966                PFID(&llh->lgh_id.lgl_oi.oi_fid), size);
 967
 968         llog_handle_put(llh);
 969
 970         RETURN(0);
 971
 972 }
 973
 974 __u64 llog_cat_size(const struct lu_env *env, struct llog_handle *cat_llh)
 975 {
 976         __u64 size = llog_size(env, cat_llh);
 977
 978         llog_cat_process_or_fork(env, cat_llh, llog_cat_size_cb,
 979                                  NULL, &size, 0, 0, false);
 980
 981         return size;
 982 }
 983 EXPORT_SYMBOL(llog_cat_size);
 984
 985 static int llog_cat_reverse_process_cb(const struct lu_env *env,
 986                                        struct llog_handle *cat_llh,
 987                                        struct llog_rec_hdr *rec, void *data)
 988 {
 989         struct llog_process_data *d = data;
 990         struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
 991         struct llog_handle *llh;
 992         struct llog_log_hdr *hdr;
 993         int rc;
 994
 995         if (le32_to_cpu(rec->lrh_type) != LLOG_LOGID_MAGIC) {
 996                 CERROR("invalid record in catalog\n");
 997                 RETURN(-EINVAL);
 998         }
 999         CDEBUG(D_HA, "processing log "DFID":%x at index %u of catalog "
1000                DFID"\n", PFID(&lir->lid_id.lgl_oi.oi_fid), lir->lid_id.lgl_ogen,
1001                le32_to_cpu(rec->lrh_index),
1002                PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
1003
1004         rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id);
1005         if (rc) {
1006                 CERROR("%s: cannot find handle for llog "DFID": rc = %d\n",
1007                        cat_llh->lgh_ctxt->loc_obd->obd_name,
1008                        PFID(&lir->lid_id.lgl_oi.oi_fid), rc);
1009                 if (rc == -ENOENT || rc == -ESTALE) {
1010                         /* After a server crash, a stub of index
1011                          * record in catlog could be kept, because
1012                          * plain log destroy + catlog index record
1013                          * deletion are not atomic. So we end up with
1014                          * an index but no actual record. Destroy the
1015                          * index and move on. */
1016                         rc = llog_cat_cleanup(env, cat_llh, NULL,
1017                                               rec->lrh_index);
1018                 }
1019
1020                 RETURN(rc);
1021         }
1022
1023         /* clean old empty llogs, do not consider current llog in use */
1024         hdr = llh->lgh_hdr;
1025         if ((hdr->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
1026             hdr->llh_count == 1 &&
1027             llh != cat_llh->u.chd.chd_current_log) {
1028                 rc = llog_destroy(env, llh);
1029                 if (rc)
1030                         CERROR("%s: fail to destroy empty log: rc = %d\n",
1031                                llh->lgh_ctxt->loc_obd->obd_name, rc);
1032                 GOTO(out, rc = LLOG_DEL_PLAIN);
1033         }
1034
1035         rc = llog_reverse_process(env, llh, d->lpd_cb, d->lpd_data, NULL);
1036
1037 out:
1038         /* The empty plain was destroyed while processing */
1039         if (rc == LLOG_DEL_PLAIN)
1040                 rc = llog_cat_cleanup(env, cat_llh, llh,
1041                                       llh->u.phd.phd_cookie.lgc_index);
1042
1043         llog_handle_put(llh);
1044         RETURN(rc);
1045 }
1046
1047 int llog_cat_reverse_process(const struct lu_env *env,
1048                              struct llog_handle *cat_llh,
1049                              llog_cb_t cb, void *data)
1050 {
1051         struct llog_process_data d;
1052         struct llog_process_cat_data cd;
1053         struct llog_log_hdr *llh = cat_llh->lgh_hdr;
1054         int rc;
1055         ENTRY;
1056
1057         LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
1058         d.lpd_data = data;
1059         d.lpd_cb = cb;
1060
1061         if (llh->llh_cat_idx >= cat_llh->lgh_last_idx &&
1062             llh->llh_count > 1) {
1063                 CWARN("%s: catalog "DFID" crosses index zero\n",
1064                       cat_llh->lgh_ctxt->loc_obd->obd_name,
1065                       PFID(&cat_llh->lgh_id.lgl_oi.oi_fid));
1066
1067                 cd.lpcd_first_idx = 0;
1068                 cd.lpcd_last_idx = cat_llh->lgh_last_idx;
1069                 rc = llog_reverse_process(env, cat_llh,
1070                                           llog_cat_reverse_process_cb,
1071                                           &d, &cd);
1072                 if (rc != 0)
1073                         RETURN(rc);
1074
1075                 cd.lpcd_first_idx = le32_to_cpu(llh->llh_cat_idx);
1076                 cd.lpcd_last_idx = 0;
1077                 rc = llog_reverse_process(env, cat_llh,
1078                                           llog_cat_reverse_process_cb,
1079                                           &d, &cd);
1080         } else {
1081                 rc = llog_reverse_process(env, cat_llh,
1082                                           llog_cat_reverse_process_cb,
1083                                           &d, NULL);
1084         }
1085
1086         RETURN(rc);
1087 }
1088 EXPORT_SYMBOL(llog_cat_reverse_process);
1089
1090 static int llog_cat_set_first_idx(struct llog_handle *cathandle, int idx)
1091 {
1092         struct llog_log_hdr *llh = cathandle->lgh_hdr;
1093         int bitmap_size;
1094
1095         ENTRY;
1096
1097         bitmap_size = LLOG_HDR_BITMAP_SIZE(llh);
1098         /*
1099          * The llh_cat_idx equals to the first used index minus 1
1100          * so if we canceled the first index then llh_cat_idx
1101          * must be renewed.
1102          */
1103         if (llh->llh_cat_idx == (idx - 1)) {
1104                 llh->llh_cat_idx = idx;
1105
1106                 while (idx != cathandle->lgh_last_idx) {
1107                         idx = (idx + 1) % bitmap_size;
1108                         if (!ext2_test_bit(idx, LLOG_HDR_BITMAP(llh))) {
1109                                 /* update llh_cat_idx for each unset bit,
1110                                  * expecting the next one is set */
1111                                 llh->llh_cat_idx = idx;
1112                         } else if (idx == 0) {
1113                                 /* skip header bit */
1114                                 llh->llh_cat_idx = 0;
1115                                 continue;
1116                         } else {
1117                                 /* the first index is found */
1118                                 break;
1119                         }
1120                 }
1121
1122                 CDEBUG(D_RPCTRACE, "catlog "DFID" first idx %u, last_idx %u\n",
1123                        PFID(&cathandle->lgh_id.lgl_oi.oi_fid),
1124                        llh->llh_cat_idx, cathandle->lgh_last_idx);
1125         }
1126
1127         RETURN(0);
1128 }
1129
1130 /* Cleanup deleted plain llog traces from catalog */
1131 int llog_cat_cleanup(const struct lu_env *env, struct llog_handle *cathandle,
1132                      struct llog_handle *loghandle, int index)
1133 {
1134         int rc;
1135
1136         LASSERT(index);
1137         if (loghandle != NULL) {
1138                 /* remove destroyed llog from catalog list and
1139                  * chd_current_log variable */
1140                 down_write(&cathandle->lgh_lock);
1141                 if (cathandle->u.chd.chd_current_log == loghandle)
1142                         cathandle->u.chd.chd_current_log = NULL;
1143                 list_del_init(&loghandle->u.phd.phd_entry);
1144                 up_write(&cathandle->lgh_lock);
1145                 LASSERT(index == loghandle->u.phd.phd_cookie.lgc_index);
1146                 /* llog was opened and keep in a list, close it now */
1147                 llog_close(env, loghandle);
1148         }
1149
1150         /* do not attempt to cleanup on-disk llog if on client side */
1151         if (cathandle->lgh_obj == NULL)
1152                 return 0;
1153
1154         /* remove plain llog entry from catalog by index */
1155         llog_cat_set_first_idx(cathandle, index);
1156         rc = llog_cancel_rec(env, cathandle, index);
1157         if (rc == 0)
1158                 CDEBUG(D_HA, "cancel plain log at index %u of catalog "DFID"\n",
1159                        index, PFID(&cathandle->lgh_id.lgl_oi.oi_fid));
1160         return rc;
1161 }