lustre/lvfs/llog_lvfs.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   5  *   Author: Andreas Dilger <adilger@clusterfs.com>
   6  *
   7  *   This file is part of Lustre, http://www.lustre.org.
   8  *
   9  *   Lustre is free software; you can redistribute it and/or
  10  *   modify it under the terms of version 2 of the GNU General Public
  11  *   License as published by the Free Software Foundation.
  12  *
  13  *   Lustre is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with Lustre; if not, write to the Free Software
  20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  * OST<->MDS recovery logging infrastructure.
  23  *
  24  * Invariants in implementation:
  25  * - we do not share logs among different OST<->MDS connections, so that
  26  *   if an OST or MDS fails it need only look at log(s) relevant to itself
  27  */
  28
  29 #define DEBUG_SUBSYSTEM S_LOG
  30
  31 #ifndef EXPORT_SYMTAB
  32 #define EXPORT_SYMTAB
  33 #endif
  34
  35 #ifdef __KERNEL__
  36 #include <linux/fs.h>
  37 #else
  38 #include <liblustre.h>
  39 #endif
  40
  41 #include <linux/lvfs.h>
  42 #include <linux/lustre_fsfilt.h>
  43 #include <linux/lustre_log.h>
  44
  45 #ifdef __KERNEL__
  46
  47 static int llog_lvfs_pad(struct llog_ctxt *ctxt, struct l_file *file,
  48                          int len, int index)
  49 {
  50         struct llog_rec_hdr rec;
  51         struct llog_rec_tail tail;
  52         int rc;
  53         ENTRY;
  54
  55         LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
  56
  57         tail.lrt_len = rec.lrh_len = cpu_to_le32(len);
  58         tail.lrt_index = rec.lrh_index = cpu_to_le32(index);
  59         rec.lrh_type = 0;
  60
  61         rc = llog_fsfilt_write_record(ctxt, file, &rec, sizeof(rec),
  62                                       &file->f_pos, 0);
  63         if (rc) {
  64                 CERROR("error writing padding record: rc %d\n", rc);
  65                 goto out;
  66         }
  67
  68         file->f_pos += len - sizeof(rec) - sizeof(tail);
  69         rc = llog_fsfilt_write_record(ctxt, file, &tail, sizeof(tail),
  70                                       &file->f_pos, 0);
  71         if (rc) {
  72                 CERROR("error writing padding record: rc %d\n", rc);
  73                 goto out;
  74         }
  75
  76  out:
  77         RETURN(rc);
  78 }
  79
  80 static int llog_lvfs_write_blob(struct llog_ctxt *ctxt, struct l_file *file,
  81                                 struct llog_rec_hdr *rec, void *buf, loff_t off)
  82 {
  83         int rc;
  84         struct llog_rec_tail end;
  85         loff_t saved_off = file->f_pos;
  86         int buflen = le32_to_cpu(rec->lrh_len);
  87
  88         ENTRY;
  89         file->f_pos = off;
  90
  91         if (!buf) {
  92                 rc = llog_fsfilt_write_record(ctxt, file, rec, buflen,
  93                                               &file->f_pos, 0);
  94                 if (rc) {
  95                         CERROR("error writing log record: rc %d\n", rc);
  96                         goto out;
  97                 }
  98                 GOTO(out, rc = 0);
  99         }
 100
 101         /* the buf case */
 102         rec->lrh_len = cpu_to_le32(sizeof(*rec) + buflen + sizeof(end));
 103         rc = llog_fsfilt_write_record(ctxt, file, rec, sizeof(*rec),
 104                                       &file->f_pos, 0);
 105         if (rc) {
 106                 CERROR("error writing log hdr: rc %d\n", rc);
 107                 goto out;
 108         }
 109
 110         rc = llog_fsfilt_write_record(ctxt, file, buf, buflen,
 111                                       &file->f_pos, 0);
 112         if (rc) {
 113                 CERROR("error writing log buffer: rc %d\n", rc);
 114                 goto out;
 115         }
 116
 117         end.lrt_len = rec->lrh_len;
 118         end.lrt_index = rec->lrh_index;
 119         rc = llog_fsfilt_write_record(ctxt, file, &end, sizeof(end),
 120                                       &file->f_pos, 0);
 121         if (rc) {
 122                 CERROR("error writing log tail: rc %d\n", rc);
 123                 goto out;
 124         }
 125
 126         rc = 0;
 127  out:
 128         if (saved_off > file->f_pos)
 129                 file->f_pos = saved_off;
 130         LASSERT(rc <= 0);
 131         RETURN(rc);
 132 }
 133
 134 static int llog_lvfs_read_blob(struct llog_ctxt *ctxt, struct l_file *file,
 135                                void *buf, int size, loff_t off)
 136 {
 137         loff_t offset = off;
 138         int rc;
 139         ENTRY;
 140
 141         rc = llog_fsfilt_read_record(ctxt, file, buf, size, &offset);
 142         if (rc) {
 143                 CERROR("error reading log record: rc %d\n", rc);
 144                 RETURN(rc);
 145         }
 146         RETURN(0);
 147 }
 148
 149 static int llog_lvfs_read_header(struct llog_handle *handle)
 150 {
 151         struct llog_ctxt *ctxt = handle->lgh_ctxt;
 152         int rc;
 153         ENTRY;
 154
 155         LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
 156         LASSERT(ctxt != NULL);
 157
 158         if (handle->lgh_file->f_dentry->d_inode->i_size == 0) {
 159                 CDEBUG(D_HA, "not reading header from 0-byte log\n");
 160                 RETURN(LLOG_EEMPTY);
 161         }
 162
 163         rc = llog_lvfs_read_blob(ctxt, handle->lgh_file, handle->lgh_hdr,
 164                                  LLOG_CHUNK_SIZE, 0);
 165         if (rc)
 166                 CERROR("error reading log header\n");
 167
 168         handle->lgh_last_idx = le32_to_cpu(handle->lgh_hdr->llh_tail.lrt_index);
 169         handle->lgh_file->f_pos = handle->lgh_file->f_dentry->d_inode->i_size;
 170
 171         RETURN(rc);
 172 }
 173
 174 /* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
 175 /* appends if idx == -1, otherwise overwrites record idx. */
 176 static int llog_lvfs_write_rec(struct llog_handle *loghandle,
 177                                struct llog_rec_hdr *rec,
 178                                struct llog_cookie *reccookie,
 179                                int cookiecount,
 180                                void *buf, int idx)
 181 {
 182         struct llog_log_hdr *llh;
 183         int reclen = le32_to_cpu(rec->lrh_len), index, rc;
 184         struct llog_rec_tail *lrt;
 185         struct llog_ctxt *ctxt = loghandle->lgh_ctxt;
 186         struct file *file;
 187         loff_t offset;
 188         size_t left;
 189         ENTRY;
 190
 191         llh = loghandle->lgh_hdr;
 192         file = loghandle->lgh_file;
 193
 194         /* record length should not bigger than LLOG_CHUNK_SIZE */
 195         if (buf)
 196                 rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr)
 197                       - sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
 198         else
 199                 rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
 200         if (rc)
 201                 RETURN(rc);
 202
 203         if (idx != -1) {
 204                 loff_t saved_offset;
 205
 206                 /* no header: only allowed to insert record 1 */
 207                 if (idx > 1 && !file->f_dentry->d_inode->i_size) {
 208                         CERROR("idx != -1 in empty log\n");
 209                         LBUG();
 210                 }
 211
 212                 if (idx && llh->llh_size && llh->llh_size != reclen)
 213                         RETURN(-EINVAL);
 214
 215                 rc = llog_lvfs_write_blob(ctxt, file, &llh->llh_hdr, NULL, 0);
 216                 /* we are done if we only write the header or on error */
 217                 if (rc || idx == 0)
 218                         RETURN(rc);
 219
 220                 saved_offset = sizeof(*llh) + (idx-1)*le32_to_cpu(rec->lrh_len);
 221                 rc = llog_lvfs_write_blob(ctxt, file, rec, buf, saved_offset);
 222                 if (rc == 0 && reccookie) {
 223                         reccookie->lgc_lgl = loghandle->lgh_id;
 224                         reccookie->lgc_index = idx;
 225                         rc = 1;
 226                 }
 227                 RETURN(rc);
 228         }
 229
 230         /* Make sure that records don't cross a chunk boundary, so we can
 231          * process them page-at-a-time if needed.  If it will cross a chunk
 232          * boundary, write in a fake (but referenced) entry to pad the chunk.
 233          *
 234          * We know that llog_current_log() will return a loghandle that is
 235          * big enough to hold reclen, so all we care about is padding here.
 236          */
 237         left = LLOG_CHUNK_SIZE - (file->f_pos & (LLOG_CHUNK_SIZE - 1));
 238         if (buf)
 239                 reclen = sizeof(*rec) + le32_to_cpu(rec->lrh_len) +
 240                          sizeof(struct llog_rec_tail);
 241
 242         /* NOTE: padding is a record, but no bit is set */
 243         if (left != 0 && left != reclen &&
 244             left < (reclen + LLOG_MIN_REC_SIZE)) {
 245                 loghandle->lgh_last_idx++;
 246                 rc = llog_lvfs_pad(ctxt, file, left, loghandle->lgh_last_idx);
 247                 if (rc)
 248                         RETURN(rc);
 249                 /* if it's the last idx in log file, then return -ENOSPC */
 250                 if (loghandle->lgh_last_idx == LLOG_BITMAP_SIZE(llh) - 1)
 251                         RETURN(-ENOSPC);
 252         }
 253
 254         loghandle->lgh_last_idx++;
 255         index = loghandle->lgh_last_idx;
 256         LASSERT(index < LLOG_BITMAP_SIZE(llh));
 257         rec->lrh_index = cpu_to_le32(index);
 258         if (buf == NULL) {
 259                 lrt = (void *)rec + le32_to_cpu(rec->lrh_len) - sizeof(*lrt);
 260                 lrt->lrt_len = rec->lrh_len;
 261                 lrt->lrt_index = rec->lrh_index;
 262         }
 263         if (ext2_set_bit(index, llh->llh_bitmap)) {
 264                 CERROR("argh, index %u already set in log bitmap?\n", index);
 265                 LBUG(); /* should never happen */
 266         }
 267         llh->llh_count = cpu_to_le32(le32_to_cpu(llh->llh_count) + 1);
 268         llh->llh_tail.lrt_index = cpu_to_le32(index);
 269
 270         offset = 0;
 271         rc = llog_lvfs_write_blob(ctxt, file, &llh->llh_hdr, NULL, 0);
 272         if (rc)
 273                 RETURN(rc);
 274
 275         CDEBUG(D_HA, "adding record "LPX64": idx: %u, %u bytes off: %lld\n",
 276                loghandle->lgh_id.lgl_oid, index, le32_to_cpu(rec->lrh_len),
 277                file->f_pos);
 278
 279         rc = llog_lvfs_write_blob(ctxt, file, rec, buf, file->f_pos);
 280         if (rc)
 281                 RETURN(rc);
 282
 283         if (rc == 0 && reccookie) {
 284                 if (llog_cookie_get_flags(reccookie) & LLOG_COOKIE_REPLAY) {
 285                         LASSERTF(EQ_LOGID(reccookie->lgc_lgl,loghandle->lgh_id),
 286                                  "lgc_lgl.oid/gr "LPU64"/"LPU64" lgh_id.oid/gr"
 287                                  LPU64"/"LPU64"\n",
 288                                  reccookie->lgc_lgl.lgl_oid,
 289                                  reccookie->lgc_lgl.lgl_ogr,
 290                                  loghandle->lgh_id.lgl_oid,
 291                                  loghandle->lgh_id.lgl_oid);
 292                         LASSERTF(reccookie->lgc_index == index,
 293                                  "lgc_index %u != index %u\n",
 294                                  reccookie->lgc_index, index);
 295                 } else {
 296                         reccookie->lgc_lgl = loghandle->lgh_id;
 297                         reccookie->lgc_index = index;
 298                         llog_cookie_add_flags(reccookie, LLOG_COOKIE_REPLAY);
 299                 }
 300
 301                 if (le32_to_cpu(rec->lrh_type) == MDS_UNLINK_REC)
 302                         reccookie->lgc_subsys = LLOG_UNLINK_ORIG_CTXT;
 303                 else if (le32_to_cpu(rec->lrh_type) == OST_SZ_REC)
 304                         reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
 305                 else if (le32_to_cpu(rec->lrh_type) == OST_RAID1_REC)
 306                         reccookie->lgc_subsys = LLOG_RD1_ORIG_CTXT;
 307                 else
 308                         reccookie->lgc_subsys = -1;
 309                 rc = 1;
 310         }
 311         if (rc == 0 && (le32_to_cpu(rec->lrh_type) == LLOG_GEN_REC ||
 312             le32_to_cpu(rec->lrh_type) == SMFS_UPDATE_REC))
 313                 rc = 1;
 314
 315         RETURN(rc);
 316 }
 317
 318 /* We can skip reading at least as many log blocks as the number of
 319 * minimum sized log records we are skipping.  If it turns out
 320 * that we are not far enough along the log (because the
 321 * actual records are larger than minimum size) we just skip
 322 * some more records. */
 323
 324 static void llog_skip_over(__u64 *off, int curr, int goal)
 325 {
 326         if (goal <= curr)
 327                 return;
 328         *off = (*off + (goal-curr-1) * LLOG_MIN_REC_SIZE) &
 329                 ~(LLOG_CHUNK_SIZE - 1);
 330 }
 331
 332 /* sets:
 333  *  - curr_offset to the furthest point read in the log file
 334  *  - curr_idx to the log index preceeding curr_offset
 335  * returns -EIO/-EINVAL on error
 336  */
 337 static int llog_lvfs_next_block(struct llog_handle *loghandle, int *curr_idx,
 338                                 int next_idx, __u64 *curr_offset, void *buf,
 339                                 int len)
 340 {
 341         struct llog_ctxt *ctxt = loghandle->lgh_ctxt;
 342         ENTRY;
 343
 344         if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
 345                 RETURN(-EINVAL);
 346
 347         CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
 348                next_idx, *curr_idx, *curr_offset);
 349
 350         while (*curr_offset < loghandle->lgh_file->f_dentry->d_inode->i_size) {
 351                 struct llog_rec_hdr *rec;
 352                 struct llog_rec_tail *tail;
 353                 loff_t ppos;
 354                 int nbytes, rc;
 355
 356                 llog_skip_over(curr_offset, *curr_idx, next_idx);
 357
 358                 ppos = *curr_offset;
 359                 rc = llog_fsfilt_read_record(ctxt, loghandle->lgh_file,
 360                                              buf, len, &ppos);
 361
 362                 if (rc) {
 363                         CERROR("Cant read llog block at log id "LPU64
 364                                "/%u offset "LPU64"\n",
 365                                loghandle->lgh_id.lgl_oid,
 366                                loghandle->lgh_id.lgl_ogen,
 367                                *curr_offset);
 368                         RETURN(rc);
 369                 }
 370
 371                 nbytes = ppos - *curr_offset;
 372                 *curr_offset = ppos;
 373
 374                 if (nbytes == 0) /* end of file, nothing to do */
 375                         RETURN(0);
 376
 377                 if (nbytes < sizeof(*tail)) {
 378                         CERROR("Invalid llog block at log id "LPU64"/%u offset "
 379                                LPU64"\n", loghandle->lgh_id.lgl_oid,
 380                                loghandle->lgh_id.lgl_ogen, *curr_offset);
 381                         RETURN(-EINVAL);
 382                 }
 383
 384                 tail = buf + nbytes - sizeof(struct llog_rec_tail);
 385                 *curr_idx = le32_to_cpu(tail->lrt_index);
 386
 387                 /* this shouldn't happen */
 388                 if (tail->lrt_index == 0) {
 389                         CERROR("Invalid llog tail at log id "LPU64"/%u offset "
 390                                LPU64"\n", loghandle->lgh_id.lgl_oid,
 391                                loghandle->lgh_id.lgl_ogen, *curr_offset);
 392                         RETURN(-EINVAL);
 393                 }
 394                 if (le32_to_cpu(tail->lrt_index) < next_idx)
 395                         continue;
 396
 397                 /* sanity check that the start of the new buffer is no farther
 398                  * than the record that we wanted.  This shouldn't happen. */
 399                 rec = buf;
 400                 if (le32_to_cpu(rec->lrh_index) > next_idx) {
 401                         CERROR("missed desired record? %u > %u\n",
 402                                le32_to_cpu(rec->lrh_index), next_idx);
 403                         RETURN(-ENOENT);
 404                 }
 405                 RETURN(0);
 406         }
 407         RETURN(-EIO);
 408 }
 409
 410 static int llog_lvfs_prev_block(struct llog_handle *loghandle,
 411                                 int prev_idx, void *buf, int len)
 412 {
 413         struct llog_ctxt *ctxt = loghandle->lgh_ctxt;
 414         __u64 curr_offset;
 415         int rc;
 416         ENTRY;
 417
 418         if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
 419                 RETURN(-EINVAL);
 420
 421         CDEBUG(D_OTHER, "looking for log index %u n", prev_idx);
 422
 423         curr_offset = LLOG_CHUNK_SIZE;
 424         llog_skip_over(&curr_offset, 0, prev_idx);
 425
 426         while (curr_offset < loghandle->lgh_file->f_dentry->d_inode->i_size) {
 427                 struct llog_rec_hdr *rec;
 428                 struct llog_rec_tail *tail;
 429                 loff_t ppos;
 430
 431                 ppos = curr_offset;
 432                 rc = llog_fsfilt_read_record(ctxt, loghandle->lgh_file,
 433                                              buf, len, &ppos);
 434
 435                 if (rc) {
 436                         CERROR("Cant read llog block at log id "LPU64
 437                                "/%u offset "LPU64"\n",
 438                                loghandle->lgh_id.lgl_oid,
 439                                loghandle->lgh_id.lgl_ogen,
 440                                curr_offset);
 441                         RETURN(rc);
 442                 }
 443
 444                 /* put number of bytes read into rc to make code simpler */
 445                 rc = ppos - curr_offset;
 446                 curr_offset = ppos;
 447
 448                 if (rc == 0) /* end of file, nothing to do */
 449                         RETURN(0);
 450
 451                 if (rc < sizeof(*tail)) {
 452                         CERROR("Invalid llog block at log id "LPU64"/%u offset "
 453                                LPU64"\n", loghandle->lgh_id.lgl_oid,
 454                                loghandle->lgh_id.lgl_ogen, curr_offset);
 455                         RETURN(-EINVAL);
 456                 }
 457
 458                 tail = buf + rc - sizeof(struct llog_rec_tail);
 459
 460                 /* this shouldn't happen */
 461                 if (tail->lrt_index == 0) {
 462                         CERROR("Invalid llog tail at log id "LPU64"/%u offset "
 463                                LPU64"\n", loghandle->lgh_id.lgl_oid,
 464                                loghandle->lgh_id.lgl_ogen, curr_offset);
 465                         RETURN(-EINVAL);
 466                 }
 467                 if (le32_to_cpu(tail->lrt_index) < prev_idx)
 468                         continue;
 469
 470                 /* sanity check that the start of the new buffer is no farther
 471                  * than the record that we wanted.  This shouldn't happen. */
 472                 rec = buf;
 473                 if (le32_to_cpu(rec->lrh_index) > prev_idx) {
 474                         CERROR("missed desired record? %u > %u\n",
 475                                le32_to_cpu(rec->lrh_index), prev_idx);
 476                         RETURN(-ENOENT);
 477                 }
 478                 RETURN(0);
 479         }
 480         RETURN(-EIO);
 481 }
 482
 483 static struct file *llog_filp_open(char *name, int flags, int mode)
 484 {
 485         char *logname;
 486         struct file *filp;
 487         int len;
 488
 489         OBD_ALLOC(logname, PATH_MAX);
 490         if (logname == NULL)
 491                 return ERR_PTR(-ENOMEM);
 492
 493         len = snprintf(logname, PATH_MAX, "LOGS/%s", name);
 494         if (len >= PATH_MAX - 1) {
 495                 filp = ERR_PTR(-ENAMETOOLONG);
 496         } else {
 497                 filp = l_filp_open(logname, flags, mode);
 498                 if (IS_ERR(filp)) {
 499                         CERROR("logfile %s(%s): %ld\n",
 500                                flags & O_CREAT ? "create" : "open", logname,
 501                                PTR_ERR(filp));
 502                 }
 503         }
 504
 505         OBD_FREE(logname, PATH_MAX);
 506         return filp;
 507 }
 508
 509 /* creates object for the case when we have no obd (smfs). */
 510 static struct file *
 511 llog_object_create_alone(struct llog_ctxt *ctxt, struct llog_logid *lgh_id)
 512 {
 513         struct file *filp;
 514         int rc = 0;
 515         ENTRY;
 516
 517         LASSERT(lgh_id != NULL);
 518         if (lgh_id->lgl_oid) {
 519                 struct dentry *dchild;
 520                 char fidname[LL_FID_NAMELEN];
 521                 int fidlen = 0;
 522
 523                 down(&ctxt->loc_objects_dir->d_inode->i_sem);
 524                 fidlen = ll_fid2str(fidname, lgh_id->lgl_oid, lgh_id->lgl_ogen);
 525                 dchild = lookup_one_len(fidname, ctxt->loc_objects_dir, fidlen);
 526                 if (IS_ERR(dchild)) {
 527                         up(&ctxt->loc_objects_dir->d_inode->i_sem);
 528                         RETURN((struct file *)dchild);
 529                 }
 530                 if (dchild->d_inode == NULL) {
 531                         struct dentry_params dp;
 532                         struct inode *inode;
 533
 534                         dchild->d_fsdata = (void *) &dp;
 535                         dp.p_ptr = NULL;
 536                         dp.p_inum = lgh_id->lgl_oid;
 537                         rc = ll_vfs_create(ctxt->loc_objects_dir->d_inode,
 538                                            dchild, S_IFREG, NULL);
 539                         if (dchild->d_fsdata == (void *)(unsigned long)lgh_id->lgl_oid)
 540                                 dchild->d_fsdata = NULL;
 541                         if (rc) {
 542                                 CDEBUG(D_INODE, "err during create: %d\n", rc);
 543                                 dput(dchild);
 544                                 up(&ctxt->loc_objects_dir->d_inode->i_sem);
 545                                 RETURN(ERR_PTR(rc));
 546                         }
 547                         inode = dchild->d_inode;
 548                         LASSERT(inode->i_ino == lgh_id->lgl_oid);
 549                         inode->i_generation = lgh_id->lgl_ogen;
 550                         CDEBUG(D_HA, "recreated ino %lu with gen %u\n",
 551                                inode->i_ino, inode->i_generation);
 552                         mark_inode_dirty(inode);
 553                 }
 554
 555                 mntget(ctxt->loc_lvfs_ctxt->pwdmnt);
 556                 filp = dentry_open(dchild, ctxt->loc_lvfs_ctxt->pwdmnt,
 557                                     O_RDWR | O_LARGEFILE);
 558                 if (IS_ERR(filp)) {
 559                         dput(dchild);
 560                         up(&ctxt->loc_objects_dir->d_inode->i_sem);
 561                         RETURN(filp);
 562                 }
 563                 if (!S_ISREG(filp->f_dentry->d_inode->i_mode)) {
 564                         CERROR("%s is not a regular file!: mode = %o\n", fidname,
 565                                filp->f_dentry->d_inode->i_mode);
 566                         filp_close(filp, 0);
 567                         up(&ctxt->loc_objects_dir->d_inode->i_sem);
 568                         RETURN(ERR_PTR(-ENOENT));
 569                 }
 570
 571                 up(&ctxt->loc_objects_dir->d_inode->i_sem);
 572                 RETURN(filp);
 573
 574         } else {
 575                 unsigned int tmpname = ll_insecure_random_int();
 576                 char fidname[LL_FID_NAMELEN];
 577                 struct dentry *new_child, *parent;
 578                 void *handle;
 579                 int err, namelen;
 580
 581                 sprintf(fidname, "OBJECTS/%u", tmpname);
 582                 filp = filp_open(fidname, O_CREAT | O_EXCL, 0644);
 583                 if (IS_ERR(filp)) {
 584                         rc = PTR_ERR(filp);
 585                         if (rc == -EEXIST) {
 586                                 CERROR("impossible object name collision %u\n",
 587                                         tmpname);
 588                                 LBUG();
 589                         }
 590                         CERROR("error creating tmp object %u: rc %d\n", tmpname, rc);
 591                         RETURN(filp);
 592                 }
 593
 594                 namelen = ll_fid2str(fidname, filp->f_dentry->d_inode->i_ino,
 595                                      filp->f_dentry->d_inode->i_generation);
 596                 parent = filp->f_dentry->d_parent;
 597                 down(&parent->d_inode->i_sem);
 598                 new_child = lookup_one_len(fidname, parent, namelen);
 599                 if (IS_ERR(new_child)) {
 600                         CERROR("getting neg dentry for obj rename: %d\n", rc);
 601                         GOTO(out_close, rc = PTR_ERR(new_child));
 602                 }
 603                 if (new_child->d_inode != NULL) {
 604                         CERROR("impossible non-negative obj dentry %lu:%u!\n",
 605                                 filp->f_dentry->d_inode->i_ino,
 606                                 filp->f_dentry->d_inode->i_generation);
 607                         LBUG();
 608                 }
 609
 610                 handle = llog_fsfilt_start(ctxt, parent->d_inode, FSFILT_OP_RENAME, NULL);
 611                 if (IS_ERR(handle))
 612                         GOTO(out_dput, rc = PTR_ERR(handle));
 613
 614                 lock_kernel();
 615                 rc = vfs_rename(parent->d_inode, filp->f_dentry,
 616                                 parent->d_inode, new_child);
 617                 unlock_kernel();
 618                 if (rc)
 619                         CERROR("error renaming new object %lu:%u: rc %d\n",
 620                                 filp->f_dentry->d_inode->i_ino,
 621                                 filp->f_dentry->d_inode->i_generation, rc);
 622
 623                 err = llog_fsfilt_commit(ctxt, parent->d_inode, handle, 0);
 624                 if (!rc)
 625                         rc = err;
 626
 627         out_dput:
 628                 dput(new_child);
 629         out_close:
 630                 up(&parent->d_inode->i_sem);
 631                 if (rc) {
 632                         filp_close(filp, 0);
 633                         filp = ERR_PTR(rc);
 634                 } else {
 635                         /* FIXME: is this group 1 is correct? */
 636                         lgh_id->lgl_ogr = 1;
 637                         lgh_id->lgl_oid = filp->f_dentry->d_inode->i_ino;
 638                         lgh_id->lgl_ogen = filp->f_dentry->d_inode->i_generation;
 639                 }
 640                 RETURN(filp);
 641         }
 642 }
 643
 644 /* creates object for generic case (obd exists) */
 645 static struct file *
 646 llog_object_create_generic(struct llog_ctxt *ctxt, struct llog_logid *lgh_id)
 647 {
 648         struct file *filp = NULL;
 649         struct dentry *dchild;
 650         struct obd_device *obd;
 651         struct obdo *oa = NULL;
 652         int open_flags = O_RDWR | O_LARGEFILE;
 653         int rc = 0;
 654         ENTRY;
 655
 656         obd = ctxt->loc_exp->exp_obd;
 657         LASSERT(obd != NULL);
 658
 659         if (lgh_id->lgl_oid) {
 660                 dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, lgh_id->lgl_oid,
 661                                              lgh_id->lgl_ogen, lgh_id->lgl_ogr);
 662                 if (IS_ERR(dchild) == -ENOENT) {
 663                         OBD_ALLOC(oa, sizeof(*oa));
 664                         if (!oa)
 665                                 RETURN(ERR_PTR(-ENOMEM));
 666
 667                         oa->o_id = lgh_id->lgl_oid;
 668                         oa->o_generation = lgh_id->lgl_ogen;
 669                         oa->o_gr = lgh_id->lgl_ogr;
 670                         oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
 671                         rc = obd_create(ctxt->loc_exp, oa, NULL, NULL);
 672                         if (rc) {
 673                                 CDEBUG(D_INODE, "err during create: %d\n", rc);
 674                                 GOTO(out_free_oa, rc);
 675                         }
 676                         CDEBUG(D_HA, "re-create log object "LPX64":0x%x:"LPX64"\n",
 677                                lgh_id->lgl_oid, lgh_id->lgl_ogen, lgh_id->lgl_ogr);
 678
 679                         dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, lgh_id->lgl_oid,
 680                                                      lgh_id->lgl_ogen, lgh_id->lgl_ogr);
 681                 } else if (IS_ERR(dchild)) {
 682                         CERROR("error looking up logfile "LPX64":0x%x: rc %d\n",
 683                                lgh_id->lgl_oid, lgh_id->lgl_ogen, rc);
 684                         RETURN((struct file *)dchild);
 685                 }
 686
 687                 filp = l_dentry_open(&obd->obd_lvfs_ctxt, dchild, open_flags);
 688                 if (IS_ERR(filp)) {
 689                         l_dput(dchild);
 690                         rc = PTR_ERR(filp);
 691                         CERROR("error opening logfile "LPX64"0x%x: rc %d\n",
 692                                lgh_id->lgl_oid, lgh_id->lgl_ogen, rc);
 693                 }
 694                 GOTO(out_free_oa, rc);
 695         } else {
 696                 /* this is important to work here over obd_create() as it manages
 697                   groups and we need it. Yet another reason is that mds_obd_create()
 698                  is fully the same as old version of this function and this helps
 699                  us to avoid code duplicating and layering violating. */
 700                 OBD_ALLOC(oa, sizeof(*oa));
 701                 if (!oa)
 702                         RETURN(ERR_PTR(-ENOMEM));
 703
 704                 oa->o_gr = FILTER_GROUP_LLOG;
 705                 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
 706                 rc = obd_create(ctxt->loc_exp, oa, NULL, NULL);
 707                 if (rc)
 708                         GOTO(out_free_oa, rc);
 709
 710                 dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, oa->o_id,
 711                                              oa->o_generation, oa->o_gr);
 712                 if (IS_ERR(dchild))
 713                         GOTO(out_free_oa, rc = PTR_ERR(dchild));
 714
 715                 filp = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
 716                                      open_flags);
 717                 if (IS_ERR(filp)) {
 718                         l_dput(dchild);
 719                         GOTO(out_free_oa, rc = PTR_ERR(filp));
 720                 }
 721
 722                 /* group 1 is not longer valid, we use the group which is set
 723                 by obd_create()->mds_obd_create(). */
 724                 lgh_id->lgl_ogr = oa->o_gr;
 725                 lgh_id->lgl_oid = oa->o_id;
 726                 lgh_id->lgl_ogen = oa->o_generation;
 727         }
 728
 729 out_free_oa:
 730         if (rc)
 731                 filp = ERR_PTR(rc);
 732         if (oa)
 733                 OBD_FREE(oa, sizeof(*oa));
 734         RETURN(filp);
 735 }
 736
 737 static struct file *
 738 llog_object_create(struct llog_ctxt *ctxt, struct llog_logid *lgh_id)
 739 {
 740         if (ctxt->loc_alone)
 741                 return llog_object_create_alone(ctxt, lgh_id);
 742         else
 743                 return llog_object_create_generic(ctxt, lgh_id);
 744 }
 745
 746 static int llog_add_link_object(struct llog_ctxt *ctxt, struct llog_logid logid,
 747                                 struct dentry *dentry)
 748 {
 749         struct dentry *new_child;
 750         char fidname[LL_FID_NAMELEN];
 751         void *handle;
 752         int namelen, rc = 0, err;
 753         ENTRY;
 754
 755         namelen = ll_fid2str(fidname, logid.lgl_oid, logid.lgl_ogen);
 756         down(&ctxt->loc_objects_dir->d_inode->i_sem);
 757         new_child = lookup_one_len(fidname, ctxt->loc_objects_dir, namelen);
 758         if (IS_ERR(new_child)) {
 759                 CERROR("getting neg dentry for obj rename: %d\n", rc);
 760                 GOTO(out, rc = PTR_ERR(new_child));
 761         }
 762         if (new_child->d_inode == dentry->d_inode)
 763                 GOTO(out_dput, rc);
 764         if (new_child->d_inode != NULL) {
 765                 CERROR("impossible non-negative obj dentry "LPX64":%u!\n",
 766                        logid.lgl_oid, logid.lgl_ogen);
 767                 LBUG();
 768         }
 769         handle = llog_fsfilt_start(ctxt, ctxt->loc_objects_dir->d_inode,
 770                                    FSFILT_OP_LINK, NULL);
 771         if (IS_ERR(handle))
 772                 GOTO(out_dput, rc = PTR_ERR(handle));
 773
 774         lock_kernel();
 775         rc = vfs_link(dentry, ctxt->loc_objects_dir->d_inode, new_child);
 776         unlock_kernel();
 777         if (rc) {
 778                 CERROR("error link new object "LPX64":%08x: rc %d\n",
 779                        logid.lgl_oid, logid.lgl_ogen, rc);
 780                 /* it doesn't make much sense to get -EEXIST here */
 781                 LASSERTF(rc != -EEXIST, "bug 3490: dentry: %p "
 782                          "dir->d_ionode %p new_child: %p  \n",
 783                          dentry, ctxt->loc_objects_dir->d_inode, new_child);
 784         }
 785         err = llog_fsfilt_commit(ctxt, ctxt->loc_objects_dir->d_inode, handle, 0);
 786 out_dput:
 787         l_dput(new_child);
 788 out:
 789         up(&ctxt->loc_objects_dir->d_inode->i_sem);
 790         RETURN(rc);
 791 }
 792
 793 static int llog_lvfs_open(struct llog_ctxt *ctxt, struct llog_handle **res,
 794                           struct llog_logid *logid, char *name, int flags)
 795 {
 796         struct llog_handle *handle;
 797         struct lvfs_run_ctxt saved;
 798         int rc = 0;
 799         int open_flags = O_RDWR | O_LARGEFILE;
 800         ENTRY;
 801
 802         if (flags & OBD_LLOG_FL_CREATE)
 803                 open_flags |= O_CREAT;
 804
 805         handle = llog_alloc_handle();
 806         if (handle == NULL)
 807                 RETURN(-ENOMEM);
 808         *res = handle;
 809
 810         LASSERT(ctxt);
 811         if (ctxt->loc_lvfs_ctxt)
 812                 push_ctxt(&saved, ctxt->loc_lvfs_ctxt, NULL);
 813
 814         if (logid != NULL) {
 815                 handle->lgh_file = llog_object_create(ctxt, logid);
 816                 if (IS_ERR(handle->lgh_file)) {
 817                         CERROR("cannot create/open llog object "LPX64":%x "
 818                                "error = %ld", logid->lgl_oid, logid->lgl_ogen,
 819                                PTR_ERR(handle->lgh_file));
 820                         GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
 821                 }
 822                 handle->lgh_id = *logid;
 823
 824         } else if (name) {
 825                 handle->lgh_file = llog_filp_open(name, open_flags, 0644);
 826                 if (IS_ERR(handle->lgh_file)) {
 827                         CERROR("cannot open %s file, error = %ld\n",
 828                                name, PTR_ERR(handle->lgh_file));
 829                         GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
 830                 }
 831                 LASSERT(handle->lgh_file->f_dentry->d_parent == ctxt->loc_logs_dir);
 832
 833                 handle->lgh_id.lgl_ogr = 1;
 834                 handle->lgh_id.lgl_oid = handle->lgh_file->f_dentry->d_inode->i_ino;
 835                 handle->lgh_id.lgl_ogen = handle->lgh_file->f_dentry->d_inode->i_generation;
 836                 rc = llog_add_link_object(ctxt, handle->lgh_id, handle->lgh_file->f_dentry);
 837                 if (rc)
 838                         GOTO(cleanup, rc);
 839
 840         } else {
 841                 handle->lgh_file = llog_object_create(ctxt, &handle->lgh_id);
 842                 if (IS_ERR(handle->lgh_file)) {
 843                         CERROR("cannot create llog object, error = %ld\n",
 844                                PTR_ERR(handle->lgh_file));
 845                         GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
 846                 }
 847         }
 848
 849         handle->lgh_ctxt = ctxt;
 850 finish:
 851         if (ctxt->loc_lvfs_ctxt)
 852                 pop_ctxt(&saved, ctxt->loc_lvfs_ctxt, NULL);
 853         RETURN(rc);
 854 cleanup:
 855         llog_free_handle(handle);
 856         goto finish;
 857 }
 858
 859 static int llog_lvfs_close(struct llog_handle *handle)
 860 {
 861         int rc;
 862         ENTRY;
 863
 864         rc = filp_close(handle->lgh_file, 0);
 865         if (rc)
 866                 CERROR("error closing log: rc %d\n", rc);
 867         RETURN(rc);
 868 }
 869
 870 static int llog_lvfs_destroy(struct llog_handle *loghandle)
 871 {
 872         struct llog_ctxt *ctxt = loghandle->lgh_ctxt;
 873         struct lvfs_run_ctxt saved;
 874         struct dentry *fdentry;
 875         struct inode *parent_inode;
 876         char fidname[LL_FID_NAMELEN];
 877         void *handle;
 878         int rc = -EINVAL, err, namelen;
 879         ENTRY;
 880
 881         if (ctxt->loc_lvfs_ctxt)
 882                 push_ctxt(&saved, ctxt->loc_lvfs_ctxt, NULL);
 883
 884         fdentry = loghandle->lgh_file->f_dentry;
 885         parent_inode = fdentry->d_parent->d_inode;
 886
 887         if (!strcmp(fdentry->d_parent->d_name.name, "LOGS")) {
 888                 LASSERT(parent_inode == ctxt->loc_logs_dir->d_inode);
 889
 890                 namelen = ll_fid2str(fidname, fdentry->d_inode->i_ino,
 891                                      fdentry->d_inode->i_generation);
 892                 dget(fdentry);
 893                 rc = llog_lvfs_close(loghandle);
 894                 if (rc) {
 895                         dput(fdentry);
 896                         GOTO(out, rc);
 897                 }
 898
 899                 handle = llog_fsfilt_start(ctxt, parent_inode,
 900                                            FSFILT_OP_UNLINK, NULL);
 901                 if (IS_ERR(handle)) {
 902                         dput(fdentry);
 903                         GOTO(out, rc = PTR_ERR(handle));
 904                 }
 905
 906                 down(&parent_inode->i_sem);
 907                 rc = vfs_unlink(parent_inode, fdentry);
 908                 up(&parent_inode->i_sem);
 909                 dput(fdentry);
 910
 911                 if (!rc) {
 912                         down(&ctxt->loc_objects_dir->d_inode->i_sem);
 913                         fdentry = lookup_one_len(fidname, ctxt->loc_objects_dir,
 914                                                  namelen);
 915                         if (fdentry == NULL || fdentry->d_inode == NULL) {
 916                                 CERROR("destroy non_existent object %s\n", fidname);
 917                                 GOTO(out_err, rc = IS_ERR(fdentry) ?
 918                                      PTR_ERR(fdentry) : -ENOENT);
 919                         }
 920                         rc = vfs_unlink(ctxt->loc_objects_dir->d_inode, fdentry);
 921                         l_dput(fdentry);
 922 out_err:
 923                         up(&ctxt->loc_objects_dir->d_inode->i_sem);
 924                 }
 925                 err = llog_fsfilt_commit(ctxt, parent_inode, handle, 0);
 926                 if (err && !rc)
 927                         err = rc;
 928
 929                 GOTO(out, rc);
 930         }
 931         if (ctxt->loc_alone) {
 932                 if (!strcmp(fdentry->d_parent->d_name.name, "OBJECTS")) {
 933                         LASSERT(parent_inode == ctxt->loc_objects_dir->d_inode);
 934
 935                         dget(fdentry);
 936                         rc = llog_lvfs_close(loghandle);
 937                         if (rc == 0) {
 938                                 down(&parent_inode->i_sem);
 939                                 rc = vfs_unlink(parent_inode, fdentry);
 940                                 up(&parent_inode->i_sem);
 941                         }
 942                         dput(fdentry);
 943                 }
 944         } else {
 945                 struct obdo *oa = NULL;
 946
 947                 OBD_ALLOC(oa, sizeof(*oa));
 948                 if (!oa)
 949                         GOTO(out, rc = -ENOMEM);
 950
 951                 oa->o_id = loghandle->lgh_id.lgl_oid;
 952                 oa->o_gr = loghandle->lgh_id.lgl_ogr;
 953                 oa->o_generation = loghandle->lgh_id.lgl_ogen;
 954                 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLGENER;
 955
 956                 rc = llog_lvfs_close(loghandle);
 957                 if (rc)
 958                         GOTO(out_free_oa, rc);
 959
 960                 rc = obd_destroy(loghandle->lgh_ctxt->loc_exp, oa, NULL, NULL);
 961 out_free_oa:
 962                 OBD_FREE(oa, sizeof(*oa));
 963         }
 964 out:
 965         if (ctxt->loc_lvfs_ctxt)
 966                 pop_ctxt(&saved, ctxt->loc_lvfs_ctxt, NULL);
 967         RETURN(rc);
 968 }
 969
 970 /* reads the catalog list */
 971 int llog_get_cat_list(struct lvfs_run_ctxt *ctxt,
 972                       struct fsfilt_operations *fsops, const char *name,
 973                       int count, struct llog_catid *idarray)
 974 {
 975         struct lvfs_run_ctxt saved;
 976         struct l_file *file;
 977         int size = sizeof(*idarray) * count;
 978         loff_t off = 0;
 979         int rc;
 980
 981         LASSERT(count);
 982
 983         if (ctxt)
 984                 push_ctxt(&saved, ctxt, NULL);
 985         file = l_filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
 986         if (!file || IS_ERR(file)) {
 987                 rc = PTR_ERR(file);
 988                 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
 989                        name, rc);
 990                 GOTO(out, rc);
 991         }
 992
 993         if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
 994                 CERROR("%s is not a regular file!: mode = %o\n", name,
 995                        file->f_dentry->d_inode->i_mode);
 996                 GOTO(out, rc = -ENOENT);
 997         }
 998
 999         rc = fsops->fs_read_record(file, idarray, size, &off);
1000         if (rc) {
1001                 CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
1002                        name, rc);
1003                 GOTO(out, rc);
1004         }
1005
1006  out:
1007         if (file && !IS_ERR(file))
1008                 rc = filp_close(file, 0);
1009         if (ctxt)
1010                 pop_ctxt(&saved, ctxt, NULL);
1011         RETURN(rc);
1012 }
1013 EXPORT_SYMBOL(llog_get_cat_list);
1014
1015 /* writes the cat list */
1016 int llog_put_cat_list(struct lvfs_run_ctxt *ctxt,
1017                       struct fsfilt_operations *fsops, const char *name,
1018                       int count, struct llog_catid *idarray)
1019 {
1020         struct lvfs_run_ctxt saved;
1021         struct l_file *file;
1022         int size = sizeof(*idarray) * count;
1023         loff_t off = 0;
1024         int rc;
1025
1026         LASSERT(count);
1027
1028         if (ctxt)
1029                 push_ctxt(&saved, ctxt, NULL);
1030         file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
1031         if (!file || IS_ERR(file)) {
1032                 rc = PTR_ERR(file);
1033                 CERROR("OBD filter: cannot open/create %s: rc = %d\n",
1034                        name, rc);
1035                 GOTO(out, rc);
1036         }
1037
1038         if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1039                 CERROR("%s is not a regular file!: mode = %o\n", name,
1040                        file->f_dentry->d_inode->i_mode);
1041                 GOTO(out, rc = -ENOENT);
1042         }
1043
1044         rc = fsops->fs_write_record(file, idarray, size, &off, 1);
1045         if (rc) {
1046                 CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
1047                        name, rc);
1048                 GOTO(out, rc);
1049         }
1050
1051  out:
1052         if (file && !IS_ERR(file))
1053                 rc = filp_close(file, 0);
1054         if (ctxt)
1055                 pop_ctxt(&saved, ctxt, NULL);
1056         RETURN(rc);
1057 }
1058 EXPORT_SYMBOL(llog_put_cat_list);
1059
1060 struct llog_operations llog_lvfs_ops = {
1061         lop_open:        llog_lvfs_open,
1062         lop_destroy:     llog_lvfs_destroy,
1063         lop_close:       llog_lvfs_close,
1064         lop_read_header: llog_lvfs_read_header,
1065         lop_write_rec:   llog_lvfs_write_rec,
1066         lop_next_block:  llog_lvfs_next_block,
1067         lop_prev_block:  llog_lvfs_prev_block,
1068 };
1069 EXPORT_SYMBOL(llog_lvfs_ops);
1070
1071 #else /* !__KERNEL__ */
1072
1073 static int llog_lvfs_read_header(struct llog_handle *handle)
1074 {
1075         LBUG();
1076         return 0;
1077 }
1078
1079 static int llog_lvfs_write_rec(struct llog_handle *loghandle,
1080                                struct llog_rec_hdr *rec,
1081                                struct llog_cookie *reccookie, int cookiecount,
1082                                void *buf, int idx)
1083 {
1084         LBUG();
1085         return 0;
1086 }
1087
1088 static int llog_lvfs_open(struct llog_ctxt *ctxt, struct llog_handle **res,
1089                           struct llog_logid *logid, char *name, int flags)
1090 {
1091         LBUG();
1092         return 0;
1093 }
1094
1095 static int llog_lvfs_close(struct llog_handle *handle)
1096 {
1097         LBUG();
1098         return 0;
1099 }
1100
1101 static int llog_lvfs_destroy(struct llog_handle *handle)
1102 {
1103         LBUG();
1104         return 0;
1105 }
1106
1107 int llog_get_cat_list(struct lvfs_run_ctxt *ctxt,
1108                       struct fsfilt_operations *fsops, const char *name,
1109                       int count, struct llog_catid *idarray)
1110 {
1111         LBUG();
1112         return 0;
1113 }
1114
1115 int llog_put_cat_list(struct lvfs_run_ctxt *ctxt,
1116                       struct fsfilt_operations *fsops, const char *name,
1117                       int count, struct llog_catid *idarray)
1118 {
1119         LBUG();
1120         return 0;
1121 }
1122
1123 int llog_lvfs_prev_block(struct llog_handle *loghandle,
1124                          int prev_idx, void *buf, int len)
1125 {
1126         LBUG();
1127         return 0;
1128 }
1129
1130 int llog_lvfs_next_block(struct llog_handle *loghandle, int *curr_idx,
1131                          int next_idx, __u64 *offset, void *buf, int len)
1132 {
1133         LBUG();
1134         return 0;
1135 }
1136
1137 struct llog_operations llog_lvfs_ops = {
1138         lop_open:        llog_lvfs_open,
1139         lop_destroy:     llog_lvfs_destroy,
1140         lop_close:       llog_lvfs_close,
1141         lop_read_header: llog_lvfs_read_header,
1142         lop_write_rec:   llog_lvfs_write_rec,
1143         lop_next_block:  llog_lvfs_next_block,
1144         lop_prev_block:  llog_lvfs_prev_block,
1145 };
1146 #endif