fs/ocfs2/resize.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * resize.c
   4  *
   5  * volume resize.
   6  * Inspired by ext3/resize.c.
   7  *
   8  * Copyright (C) 2007 Oracle.  All rights reserved.
   9  */
  10
  11 #include <linux/fs.h>
  12 #include <linux/types.h>
  13
  14 #include <cluster/masklog.h>
  15
  16 #include "ocfs2.h"
  17
  18 #include "alloc.h"
  19 #include "dlmglue.h"
  20 #include "inode.h"
  21 #include "journal.h"
  22 #include "super.h"
  23 #include "sysfile.h"
  24 #include "uptodate.h"
  25 #include "ocfs2_trace.h"
  26
  27 #include "buffer_head_io.h"
  28 #include "suballoc.h"
  29 #include "resize.h"
  30
  31 /*
  32  * Check whether there are new backup superblocks exist
  33  * in the last group. If there are some, mark them or clear
  34  * them in the bitmap.
  35  *
  36  * Return how many backups we find in the last group.
  37  */
  38 static u16 ocfs2_calc_new_backup_super(struct inode *inode,
  39                                        struct ocfs2_group_desc *gd,
  40                                        u16 cl_cpg,
  41                                        u16 old_bg_clusters,
  42                                        int set)
  43 {
  44         int i;
  45         u16 backups = 0;
  46         u32 cluster, lgd_cluster;
  47         u64 blkno, gd_blkno, lgd_blkno = le64_to_cpu(gd->bg_blkno);
  48
  49         for (i = 0; i < OCFS2_MAX_BACKUP_SUPERBLOCKS; i++) {
  50                 blkno = ocfs2_backup_super_blkno(inode->i_sb, i);
  51                 cluster = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
  52
  53                 gd_blkno = ocfs2_which_cluster_group(inode, cluster);
  54                 if (gd_blkno < lgd_blkno)
  55                         continue;
  56                 else if (gd_blkno > lgd_blkno)
  57                         break;
  58
  59                 /* check if already done backup super */
  60                 lgd_cluster = ocfs2_blocks_to_clusters(inode->i_sb, lgd_blkno);
  61                 lgd_cluster += old_bg_clusters;
  62                 if (lgd_cluster >= cluster)
  63                         continue;
  64
  65                 if (set)
  66                         ocfs2_set_bit(cluster % cl_cpg,
  67                                       (unsigned long *)gd->bg_bitmap);
  68                 else
  69                         ocfs2_clear_bit(cluster % cl_cpg,
  70                                         (unsigned long *)gd->bg_bitmap);
  71                 backups++;
  72         }
  73
  74         return backups;
  75 }
  76
  77 static int ocfs2_update_last_group_and_inode(handle_t *handle,
  78                                              struct inode *bm_inode,
  79                                              struct buffer_head *bm_bh,
  80                                              struct buffer_head *group_bh,
  81                                              u32 first_new_cluster,
  82                                              int new_clusters)
  83 {
  84         int ret = 0;
  85         struct ocfs2_super *osb = OCFS2_SB(bm_inode->i_sb);
  86         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bm_bh->b_data;
  87         struct ocfs2_chain_list *cl = &fe->id2.i_chain;
  88         struct ocfs2_chain_rec *cr;
  89         struct ocfs2_group_desc *group;
  90         u16 chain, num_bits, backups = 0;
  91         u16 cl_bpc = le16_to_cpu(cl->cl_bpc);
  92         u16 cl_cpg = le16_to_cpu(cl->cl_cpg);
  93         u16 old_bg_clusters;
  94         u16 contig_bits;
  95         __le16 old_bg_contig_free_bits;
  96
  97         trace_ocfs2_update_last_group_and_inode(new_clusters,
  98                                                 first_new_cluster);
  99
 100         ret = ocfs2_journal_access_gd(handle, INODE_CACHE(bm_inode),
 101                                       group_bh, OCFS2_JOURNAL_ACCESS_WRITE);
 102         if (ret < 0) {
 103                 mlog_errno(ret);
 104                 goto out;
 105         }
 106
 107         group = (struct ocfs2_group_desc *)group_bh->b_data;
 108
 109         old_bg_clusters = le16_to_cpu(group->bg_bits) / cl_bpc;
 110         /* update the group first. */
 111         num_bits = new_clusters * cl_bpc;
 112         le16_add_cpu(&group->bg_bits, num_bits);
 113         le16_add_cpu(&group->bg_free_bits_count, num_bits);
 114
 115         /*
 116          * check whether there are some new backup superblocks exist in
 117          * this group and update the group bitmap accordingly.
 118          */
 119         if (OCFS2_HAS_COMPAT_FEATURE(osb->sb,
 120                                      OCFS2_FEATURE_COMPAT_BACKUP_SB)) {
 121                 backups = ocfs2_calc_new_backup_super(bm_inode,
 122                                                      group,
 123                                                      cl_cpg, old_bg_clusters, 1);
 124                 le16_add_cpu(&group->bg_free_bits_count, -1 * backups);
 125         }
 126
 127         contig_bits = ocfs2_find_max_contig_free_bits(group->bg_bitmap,
 128                                         le16_to_cpu(group->bg_bits), 0);
 129         old_bg_contig_free_bits = group->bg_contig_free_bits;
 130         group->bg_contig_free_bits = cpu_to_le16(contig_bits);
 131
 132         ocfs2_journal_dirty(handle, group_bh);
 133
 134         /* update the inode accordingly. */
 135         ret = ocfs2_journal_access_di(handle, INODE_CACHE(bm_inode), bm_bh,
 136                                       OCFS2_JOURNAL_ACCESS_WRITE);
 137         if (ret < 0) {
 138                 mlog_errno(ret);
 139                 goto out_rollback;
 140         }
 141
 142         chain = le16_to_cpu(group->bg_chain);
 143         cr = (&cl->cl_recs[chain]);
 144         le32_add_cpu(&cr->c_total, num_bits);
 145         le32_add_cpu(&cr->c_free, num_bits);
 146         le32_add_cpu(&fe->id1.bitmap1.i_total, num_bits);
 147         le32_add_cpu(&fe->i_clusters, new_clusters);
 148
 149         if (backups) {
 150                 le32_add_cpu(&cr->c_free, -1 * backups);
 151                 le32_add_cpu(&fe->id1.bitmap1.i_used, backups);
 152         }
 153
 154         spin_lock(&OCFS2_I(bm_inode)->ip_lock);
 155         OCFS2_I(bm_inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
 156         le64_add_cpu(&fe->i_size, (u64)new_clusters << osb->s_clustersize_bits);
 157         spin_unlock(&OCFS2_I(bm_inode)->ip_lock);
 158         i_size_write(bm_inode, le64_to_cpu(fe->i_size));
 159
 160         ocfs2_journal_dirty(handle, bm_bh);
 161
 162 out_rollback:
 163         if (ret < 0) {
 164                 ocfs2_calc_new_backup_super(bm_inode,
 165                                             group,
 166                                             cl_cpg, old_bg_clusters, 0);
 167                 le16_add_cpu(&group->bg_free_bits_count, backups);
 168                 le16_add_cpu(&group->bg_bits, -1 * num_bits);
 169                 le16_add_cpu(&group->bg_free_bits_count, -1 * num_bits);
 170                 group->bg_contig_free_bits = old_bg_contig_free_bits;
 171         }
 172 out:
 173         if (ret)
 174                 mlog_errno(ret);
 175         return ret;
 176 }
 177
 178 static int update_backups(struct inode * inode, u32 clusters, char *data)
 179 {
 180         int i, ret = 0;
 181         u32 cluster;
 182         u64 blkno;
 183         struct buffer_head *backup = NULL;
 184         struct ocfs2_dinode *backup_di = NULL;
 185         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 186
 187         /* calculate the real backups we need to update. */
 188         for (i = 0; i < OCFS2_MAX_BACKUP_SUPERBLOCKS; i++) {
 189                 blkno = ocfs2_backup_super_blkno(inode->i_sb, i);
 190                 cluster = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
 191                 if (cluster >= clusters)
 192                         break;
 193
 194                 ret = ocfs2_read_blocks_sync(osb, blkno, 1, &backup);
 195                 if (ret < 0) {
 196                         mlog_errno(ret);
 197                         break;
 198                 }
 199
 200                 memcpy(backup->b_data, data, inode->i_sb->s_blocksize);
 201
 202                 backup_di = (struct ocfs2_dinode *)backup->b_data;
 203                 backup_di->i_blkno = cpu_to_le64(blkno);
 204
 205                 ret = ocfs2_write_super_or_backup(osb, backup);
 206                 brelse(backup);
 207                 backup = NULL;
 208                 if (ret < 0) {
 209                         mlog_errno(ret);
 210                         break;
 211                 }
 212         }
 213
 214         return ret;
 215 }
 216
 217 static void ocfs2_update_super_and_backups(struct inode *inode,
 218                                            int new_clusters)
 219 {
 220         int ret;
 221         u32 clusters = 0;
 222         struct buffer_head *super_bh = NULL;
 223         struct ocfs2_dinode *super_di = NULL;
 224         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 225
 226         /*
 227          * update the superblock last.
 228          * It doesn't matter if the write failed.
 229          */
 230         ret = ocfs2_read_blocks_sync(osb, OCFS2_SUPER_BLOCK_BLKNO, 1,
 231                                      &super_bh);
 232         if (ret < 0) {
 233                 mlog_errno(ret);
 234                 goto out;
 235         }
 236
 237         super_di = (struct ocfs2_dinode *)super_bh->b_data;
 238         le32_add_cpu(&super_di->i_clusters, new_clusters);
 239         clusters = le32_to_cpu(super_di->i_clusters);
 240
 241         ret = ocfs2_write_super_or_backup(osb, super_bh);
 242         if (ret < 0) {
 243                 mlog_errno(ret);
 244                 goto out;
 245         }
 246
 247         if (OCFS2_HAS_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_COMPAT_BACKUP_SB))
 248                 ret = update_backups(inode, clusters, super_bh->b_data);
 249
 250 out:
 251         brelse(super_bh);
 252         if (ret)
 253                 printk(KERN_WARNING "ocfs2: Failed to update super blocks on %s"
 254                         " during fs resize. This condition is not fatal,"
 255                         " but fsck.ocfs2 should be run to fix it\n",
 256                         osb->dev_str);
 257         return;
 258 }
 259
 260 /*
 261  * Extend the filesystem to the new number of clusters specified.  This entry
 262  * point is only used to extend the current filesystem to the end of the last
 263  * existing group.
 264  */
 265 int ocfs2_group_extend(struct inode * inode, int new_clusters)
 266 {
 267         int ret;
 268         handle_t *handle;
 269         struct buffer_head *main_bm_bh = NULL;
 270         struct buffer_head *group_bh = NULL;
 271         struct inode *main_bm_inode = NULL;
 272         struct ocfs2_dinode *fe = NULL;
 273         struct ocfs2_group_desc *group = NULL;
 274         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 275         u16 cl_bpc;
 276         u32 first_new_cluster;
 277         u64 lgd_blkno;
 278
 279         if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
 280                 return -EROFS;
 281
 282         if (new_clusters < 0)
 283                 return -EINVAL;
 284         else if (new_clusters == 0)
 285                 return 0;
 286
 287         main_bm_inode = ocfs2_get_system_file_inode(osb,
 288                                                     GLOBAL_BITMAP_SYSTEM_INODE,
 289                                                     OCFS2_INVALID_SLOT);
 290         if (!main_bm_inode) {
 291                 ret = -EINVAL;
 292                 mlog_errno(ret);
 293                 goto out;
 294         }
 295
 296         inode_lock(main_bm_inode);
 297
 298         ret = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
 299         if (ret < 0) {
 300                 mlog_errno(ret);
 301                 goto out_mutex;
 302         }
 303
 304         fe = (struct ocfs2_dinode *)main_bm_bh->b_data;
 305
 306         /* main_bm_bh is validated by inode read inside ocfs2_inode_lock(),
 307          * so any corruption is a code bug. */
 308         BUG_ON(!OCFS2_IS_VALID_DINODE(fe));
 309
 310         if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
 311                 ocfs2_group_bitmap_size(osb->sb, 0,
 312                                         osb->s_feature_incompat) * 8) {
 313                 mlog(ML_ERROR, "The disk is too old and small. "
 314                      "Force to do offline resize.");
 315                 ret = -EINVAL;
 316                 goto out_unlock;
 317         }
 318
 319         first_new_cluster = le32_to_cpu(fe->i_clusters);
 320         lgd_blkno = ocfs2_which_cluster_group(main_bm_inode,
 321                                               first_new_cluster - 1);
 322
 323         ret = ocfs2_read_group_descriptor(main_bm_inode, fe, lgd_blkno,
 324                                           &group_bh);
 325         if (ret < 0) {
 326                 mlog_errno(ret);
 327                 goto out_unlock;
 328         }
 329         group = (struct ocfs2_group_desc *)group_bh->b_data;
 330
 331         cl_bpc = le16_to_cpu(fe->id2.i_chain.cl_bpc);
 332         if (le16_to_cpu(group->bg_bits) / cl_bpc + new_clusters >
 333                 le16_to_cpu(fe->id2.i_chain.cl_cpg)) {
 334                 ret = -EINVAL;
 335                 goto out_unlock;
 336         }
 337
 338
 339         trace_ocfs2_group_extend(
 340              (unsigned long long)le64_to_cpu(group->bg_blkno), new_clusters);
 341
 342         handle = ocfs2_start_trans(osb, OCFS2_GROUP_EXTEND_CREDITS);
 343         if (IS_ERR(handle)) {
 344                 mlog_errno(PTR_ERR(handle));
 345                 ret = -EINVAL;
 346                 goto out_unlock;
 347         }
 348
 349         /* update the last group descriptor and inode. */
 350         ret = ocfs2_update_last_group_and_inode(handle, main_bm_inode,
 351                                                 main_bm_bh, group_bh,
 352                                                 first_new_cluster,
 353                                                 new_clusters);
 354         if (ret) {
 355                 mlog_errno(ret);
 356                 goto out_commit;
 357         }
 358
 359         ocfs2_update_super_and_backups(main_bm_inode, new_clusters);
 360
 361 out_commit:
 362         ocfs2_commit_trans(osb, handle);
 363 out_unlock:
 364         brelse(group_bh);
 365         brelse(main_bm_bh);
 366
 367         ocfs2_inode_unlock(main_bm_inode, 1);
 368
 369 out_mutex:
 370         inode_unlock(main_bm_inode);
 371         iput(main_bm_inode);
 372
 373 out:
 374         return ret;
 375 }
 376
 377 static int ocfs2_check_new_group(struct inode *inode,
 378                                  struct ocfs2_dinode *di,
 379                                  struct ocfs2_new_group_input *input,
 380                                  struct buffer_head *group_bh)
 381 {
 382         int ret;
 383         struct ocfs2_group_desc *gd =
 384                 (struct ocfs2_group_desc *)group_bh->b_data;
 385         u16 cl_bpc = le16_to_cpu(di->id2.i_chain.cl_bpc);
 386
 387         ret = ocfs2_check_group_descriptor(inode->i_sb, di, group_bh);
 388         if (ret)
 389                 goto out;
 390
 391         ret = -EINVAL;
 392         if (le16_to_cpu(gd->bg_chain) != input->chain)
 393                 mlog(ML_ERROR, "Group descriptor # %llu has bad chain %u "
 394                      "while input has %u set.\n",
 395                      (unsigned long long)le64_to_cpu(gd->bg_blkno),
 396                      le16_to_cpu(gd->bg_chain), input->chain);
 397         else if (le16_to_cpu(gd->bg_bits) != input->clusters * cl_bpc)
 398                 mlog(ML_ERROR, "Group descriptor # %llu has bit count %u but "
 399                      "input has %u clusters set\n",
 400                      (unsigned long long)le64_to_cpu(gd->bg_blkno),
 401                      le16_to_cpu(gd->bg_bits), input->clusters);
 402         else if (le16_to_cpu(gd->bg_free_bits_count) != input->frees * cl_bpc)
 403                 mlog(ML_ERROR, "Group descriptor # %llu has free bit count %u "
 404                      "but it should have %u set\n",
 405                      (unsigned long long)le64_to_cpu(gd->bg_blkno),
 406                      le16_to_cpu(gd->bg_bits),
 407                      input->frees * cl_bpc);
 408         else
 409                 ret = 0;
 410
 411 out:
 412         return ret;
 413 }
 414
 415 static int ocfs2_verify_group_and_input(struct inode *inode,
 416                                         struct ocfs2_dinode *di,
 417                                         struct ocfs2_new_group_input *input,
 418                                         struct buffer_head *group_bh)
 419 {
 420         u16 cl_count = le16_to_cpu(di->id2.i_chain.cl_count);
 421         u16 cl_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg);
 422         u16 next_free = le16_to_cpu(di->id2.i_chain.cl_next_free_rec);
 423         u32 cluster = ocfs2_blocks_to_clusters(inode->i_sb, input->group);
 424         u32 total_clusters = le32_to_cpu(di->i_clusters);
 425         int ret = -EINVAL;
 426
 427         if (cluster < total_clusters)
 428                 mlog(ML_ERROR, "add a group which is in the current volume.\n");
 429         else if (input->chain >= cl_count)
 430                 mlog(ML_ERROR, "input chain exceeds the limit.\n");
 431         else if (next_free != cl_count && next_free != input->chain)
 432                 mlog(ML_ERROR,
 433                      "the add group should be in chain %u\n", next_free);
 434         else if (total_clusters + input->clusters < total_clusters)
 435                 mlog(ML_ERROR, "add group's clusters overflow.\n");
 436         else if (input->clusters > cl_cpg)
 437                 mlog(ML_ERROR, "the cluster exceeds the maximum of a group\n");
 438         else if (input->frees > input->clusters)
 439                 mlog(ML_ERROR, "the free cluster exceeds the total clusters\n");
 440         else if (total_clusters % cl_cpg != 0)
 441                 mlog(ML_ERROR,
 442                      "the last group isn't full. Use group extend first.\n");
 443         else if (input->group != ocfs2_which_cluster_group(inode, cluster))
 444                 mlog(ML_ERROR, "group blkno is invalid\n");
 445         else if ((ret = ocfs2_check_new_group(inode, di, input, group_bh)))
 446                 mlog(ML_ERROR, "group descriptor check failed.\n");
 447         else
 448                 ret = 0;
 449
 450         return ret;
 451 }
 452
 453 /* Add a new group descriptor to global_bitmap. */
 454 int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
 455 {
 456         int ret;
 457         handle_t *handle;
 458         struct buffer_head *main_bm_bh = NULL;
 459         struct inode *main_bm_inode = NULL;
 460         struct ocfs2_dinode *fe = NULL;
 461         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 462         struct buffer_head *group_bh = NULL;
 463         struct ocfs2_group_desc *group = NULL;
 464         struct ocfs2_chain_list *cl;
 465         struct ocfs2_chain_rec *cr;
 466         u16 cl_bpc;
 467         u64 bg_ptr;
 468
 469         if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
 470                 return -EROFS;
 471
 472         main_bm_inode = ocfs2_get_system_file_inode(osb,
 473                                                     GLOBAL_BITMAP_SYSTEM_INODE,
 474                                                     OCFS2_INVALID_SLOT);
 475         if (!main_bm_inode) {
 476                 ret = -EINVAL;
 477                 mlog_errno(ret);
 478                 goto out;
 479         }
 480
 481         inode_lock(main_bm_inode);
 482
 483         ret = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
 484         if (ret < 0) {
 485                 mlog_errno(ret);
 486                 goto out_mutex;
 487         }
 488
 489         fe = (struct ocfs2_dinode *)main_bm_bh->b_data;
 490
 491         if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
 492                 ocfs2_group_bitmap_size(osb->sb, 0,
 493                                         osb->s_feature_incompat) * 8) {
 494                 mlog(ML_ERROR, "The disk is too old and small."
 495                      " Force to do offline resize.");
 496                 ret = -EINVAL;
 497                 goto out_unlock;
 498         }
 499
 500         ret = ocfs2_read_blocks_sync(osb, input->group, 1, &group_bh);
 501         if (ret < 0) {
 502                 mlog(ML_ERROR, "Can't read the group descriptor # %llu "
 503                      "from the device.", (unsigned long long)input->group);
 504                 goto out_unlock;
 505         }
 506
 507         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), group_bh);
 508
 509         ret = ocfs2_verify_group_and_input(main_bm_inode, fe, input, group_bh);
 510         if (ret) {
 511                 mlog_errno(ret);
 512                 goto out_free_group_bh;
 513         }
 514
 515         trace_ocfs2_group_add((unsigned long long)input->group,
 516                                input->chain, input->clusters, input->frees);
 517
 518         handle = ocfs2_start_trans(osb, OCFS2_GROUP_ADD_CREDITS);
 519         if (IS_ERR(handle)) {
 520                 mlog_errno(PTR_ERR(handle));
 521                 ret = -EINVAL;
 522                 goto out_free_group_bh;
 523         }
 524
 525         cl_bpc = le16_to_cpu(fe->id2.i_chain.cl_bpc);
 526         cl = &fe->id2.i_chain;
 527         cr = &cl->cl_recs[input->chain];
 528
 529         ret = ocfs2_journal_access_gd(handle, INODE_CACHE(main_bm_inode),
 530                                       group_bh, OCFS2_JOURNAL_ACCESS_WRITE);
 531         if (ret < 0) {
 532                 mlog_errno(ret);
 533                 goto out_commit;
 534         }
 535
 536         group = (struct ocfs2_group_desc *)group_bh->b_data;
 537         bg_ptr = le64_to_cpu(group->bg_next_group);
 538         group->bg_next_group = cr->c_blkno;
 539         ocfs2_journal_dirty(handle, group_bh);
 540
 541         ret = ocfs2_journal_access_di(handle, INODE_CACHE(main_bm_inode),
 542                                       main_bm_bh, OCFS2_JOURNAL_ACCESS_WRITE);
 543         if (ret < 0) {
 544                 group->bg_next_group = cpu_to_le64(bg_ptr);
 545                 mlog_errno(ret);
 546                 goto out_commit;
 547         }
 548
 549         if (input->chain == le16_to_cpu(cl->cl_next_free_rec)) {
 550                 le16_add_cpu(&cl->cl_next_free_rec, 1);
 551                 memset(cr, 0, sizeof(struct ocfs2_chain_rec));
 552         }
 553
 554         cr->c_blkno = cpu_to_le64(input->group);
 555         le32_add_cpu(&cr->c_total, input->clusters * cl_bpc);
 556         le32_add_cpu(&cr->c_free, input->frees * cl_bpc);
 557
 558         le32_add_cpu(&fe->id1.bitmap1.i_total, input->clusters *cl_bpc);
 559         le32_add_cpu(&fe->id1.bitmap1.i_used,
 560                      (input->clusters - input->frees) * cl_bpc);
 561         le32_add_cpu(&fe->i_clusters, input->clusters);
 562
 563         ocfs2_journal_dirty(handle, main_bm_bh);
 564
 565         spin_lock(&OCFS2_I(main_bm_inode)->ip_lock);
 566         OCFS2_I(main_bm_inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
 567         le64_add_cpu(&fe->i_size, (u64)input->clusters << osb->s_clustersize_bits);
 568         spin_unlock(&OCFS2_I(main_bm_inode)->ip_lock);
 569         i_size_write(main_bm_inode, le64_to_cpu(fe->i_size));
 570
 571         ocfs2_update_super_and_backups(main_bm_inode, input->clusters);
 572
 573 out_commit:
 574         ocfs2_commit_trans(osb, handle);
 575
 576 out_free_group_bh:
 577         brelse(group_bh);
 578
 579 out_unlock:
 580         brelse(main_bm_bh);
 581
 582         ocfs2_inode_unlock(main_bm_inode, 1);
 583
 584 out_mutex:
 585         inode_unlock(main_bm_inode);
 586         iput(main_bm_inode);
 587
 588 out:
 589         return ret;
 590 }