lwext4/ext4_balloc.c

   1 /*
   2  * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
   3  *
   4  *
   5  * HelenOS:
   6  * Copyright (c) 2012 Martin Sucha
   7  * Copyright (c) 2012 Frantisek Princ
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * - Redistributions of source code must retain the above copyright
  15  *   notice, this list of conditions and the following disclaimer.
  16  * - Redistributions in binary form must reproduce the above copyright
  17  *   notice, this list of conditions and the following disclaimer in the
  18  *   documentation and/or other materials provided with the distribution.
  19  * - The name of the author may not be used to endorse or promote products
  20  *   derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 /** @addtogroup lwext4
  35  * @{
  36  */
  37 /**
  38  * @file  ext4_balloc.c
  39  * @brief Physical block allocator.
  40  */
  41
  42 #include "ext4_config.h"
  43 #include "ext4_balloc.h"
  44 #include "ext4_super.h"
  45 #include "ext4_crc32c.h"
  46 #include "ext4_block_group.h"
  47 #include "ext4_fs.h"
  48 #include "ext4_bitmap.h"
  49 #include "ext4_inode.h"
  50
  51 /**@brief Compute number of block group from block address.
  52  * @param sb superblock pointer.
  53  * @param baddr Absolute address of block.
  54  * @return Block group index
  55  */
  56 uint32_t ext4_balloc_get_bgid_of_block(struct ext4_sblock *s,
  57                                        uint64_t baddr)
  58 {
  59         if (ext4_get32(s, first_data_block) && baddr)
  60                 baddr--;
  61
  62         return baddr / ext4_get32(s, blocks_per_group);
  63 }
  64
  65 /**@brief Compute the starting block address of a block group
  66  * @param sb   superblock pointer.
  67  * @param bgid block group index
  68  * @return Block address
  69  */
  70 uint64_t ext4_balloc_get_block_of_bgid(struct ext4_sblock *s,
  71                                        uint32_t bgid)
  72 {
  73         uint64_t baddr = 0;
  74         if (ext4_get32(s, first_data_block))
  75                 baddr++;
  76
  77         baddr += bgid * ext4_get32(s, blocks_per_group);
  78         return baddr;
  79 }
  80
  81 static uint32_t ext4_balloc_bitmap_csum(struct ext4_sblock *sb,
  82                                         void *bitmap)
  83 {
  84         uint32_t checksum = 0;
  85         if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM)) {
  86                 uint32_t blocks_per_group =
  87                         ext4_get32(sb, blocks_per_group);
  88
  89                 /* First calculate crc32 checksum against fs uuid */
  90                 checksum = ext4_crc32c(~0, sb->uuid, sizeof(sb->uuid));
  91                 /* Then calculate crc32 checksum against block_group_desc */
  92                 checksum = ext4_crc32c(checksum, bitmap,
  93                                      blocks_per_group / 8);
  94         }
  95         return checksum;
  96 }
  97
  98 /*
  99  * BIG FAT NOTES:
 100  *       Currently we do not verify the checksum of bitmaps.
 101  */
 102
 103 void ext4_balloc_set_bitmap_csum(struct ext4_sblock *sb,
 104                                  struct ext4_bgroup *bg,
 105                                  void *bitmap)
 106 {
 107         int desc_size = ext4_sb_get_desc_size(sb);
 108         uint32_t checksum = ext4_balloc_bitmap_csum(sb, bitmap);
 109         uint16_t lo_checksum = to_le16(checksum & 0xFFFF),
 110                  hi_checksum = to_le16(checksum >> 16);
 111
 112         /* See if we need to assign a 32bit checksum */
 113         bg->block_bitmap_csum_lo = lo_checksum;
 114         if (desc_size == EXT4_MAX_BLOCK_GROUP_DESCRIPTOR_SIZE)
 115                 bg->block_bitmap_csum_hi = hi_checksum;
 116
 117 }
 118
 119 int ext4_balloc_free_block(struct ext4_inode_ref *inode_ref, ext4_fsblk_t baddr)
 120 {
 121         struct ext4_fs *fs = inode_ref->fs;
 122         struct ext4_sblock *sb = &fs->sb;
 123
 124         uint32_t block_group = ext4_balloc_get_bgid_of_block(sb, baddr);
 125         uint32_t index_in_group = ext4_fs_baddr2_index_in_group(sb, baddr);
 126
 127         /* Load block group reference */
 128         struct ext4_block_group_ref bg_ref;
 129         int rc = ext4_fs_get_block_group_ref(fs, block_group, &bg_ref);
 130         if (rc != EOK)
 131                 return rc;
 132
 133         /* Load block with bitmap */
 134         ext4_fsblk_t bitmap_block_addr =
 135             ext4_bg_get_block_bitmap(bg_ref.block_group, sb);
 136
 137         struct ext4_block bitmap_block;
 138
 139         rc = ext4_block_get(fs->bdev, &bitmap_block, bitmap_block_addr);
 140         if (rc != EOK) {
 141                 ext4_fs_put_block_group_ref(&bg_ref);
 142                 return rc;
 143         }
 144
 145         /* Modify bitmap */
 146         ext4_bmap_bit_clr(bitmap_block.data, index_in_group);
 147         ext4_balloc_set_bitmap_csum(sb, bg_ref.block_group,
 148                                     bitmap_block.data);
 149         bitmap_block.dirty = true;
 150
 151         /* Release block with bitmap */
 152         rc = ext4_block_set(fs->bdev, &bitmap_block);
 153         if (rc != EOK) {
 154                 /* Error in saving bitmap */
 155                 ext4_fs_put_block_group_ref(&bg_ref);
 156                 return rc;
 157         }
 158
 159         uint32_t block_size = ext4_sb_get_block_size(sb);
 160
 161         /* Update superblock free blocks count */
 162         uint64_t sb_free_blocks = ext4_sb_get_free_blocks_cnt(sb);
 163         sb_free_blocks++;
 164         ext4_sb_set_free_blocks_cnt(sb, sb_free_blocks);
 165
 166         /* Update inode blocks count */
 167         uint64_t ino_blocks = ext4_inode_get_blocks_count(sb, inode_ref->inode);
 168         ino_blocks -= block_size / EXT4_INODE_BLOCK_SIZE;
 169         ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
 170         inode_ref->dirty = true;
 171
 172         /* Update block group free blocks count */
 173         uint32_t free_blocks =
 174             ext4_bg_get_free_blocks_count(bg_ref.block_group, sb);
 175         free_blocks++;
 176         ext4_bg_set_free_blocks_count(bg_ref.block_group, sb, free_blocks);
 177
 178         bg_ref.dirty = true;
 179
 180         /* Release block group reference */
 181         return ext4_fs_put_block_group_ref(&bg_ref);
 182 }
 183
 184 int ext4_balloc_free_blocks(struct ext4_inode_ref *inode_ref, ext4_fsblk_t first,
 185                             uint32_t count)
 186 {
 187         int rc = EOK;
 188         struct ext4_fs *fs = inode_ref->fs;
 189         struct ext4_sblock *sb = &fs->sb;
 190
 191         /* Compute indexes */
 192         uint32_t block_group_first = ext4_balloc_get_bgid_of_block(sb, first);
 193
 194         /* Compute indexes */
 195         uint32_t block_group_last =
 196             ext4_balloc_get_bgid_of_block(sb, first + count - 1);
 197
 198         if (!ext4_sb_feature_incom(sb, EXT4_FINCOM_FLEX_BG)) {
 199                 /*It is not possible without flex_bg that blocks are continuous
 200                  * and and last block belongs to other bg.*/
 201                 ext4_assert(block_group_first == ext4_balloc_get_bgid_of_block(
 202                                                      sb, first + count - 1));
 203         }
 204
 205         /* Load block group reference */
 206         struct ext4_block_group_ref bg_ref;
 207         while (block_group_first <= block_group_last) {
 208
 209                 rc =
 210                     ext4_fs_get_block_group_ref(fs, block_group_first, &bg_ref);
 211                 if (rc != EOK)
 212                         return rc;
 213
 214                 uint32_t index_in_group_first =
 215                     ext4_fs_baddr2_index_in_group(sb, first);
 216
 217                 /* Load block with bitmap */
 218                 ext4_fsblk_t bitmap_block_addr =
 219                     ext4_bg_get_block_bitmap(bg_ref.block_group, sb);
 220
 221                 struct ext4_block bitmap_block;
 222
 223                 rc = ext4_block_get(fs->bdev, &bitmap_block, bitmap_block_addr);
 224                 if (rc != EOK) {
 225                         ext4_fs_put_block_group_ref(&bg_ref);
 226                         return rc;
 227                 }
 228
 229                 uint32_t free_cnt =
 230                     ext4_sb_get_block_size(sb) * 8 - index_in_group_first;
 231
 232                 /*If last block, free only count blocks*/
 233                 free_cnt = count > free_cnt ? free_cnt : count;
 234
 235                 /* Modify bitmap */
 236                 ext4_bmap_bits_free(bitmap_block.data, index_in_group_first,
 237                                     free_cnt);
 238                 ext4_balloc_set_bitmap_csum(sb, bg_ref.block_group,
 239                                             bitmap_block.data);
 240                 bitmap_block.dirty = true;
 241
 242                 count -= free_cnt;
 243                 first += free_cnt;
 244
 245                 /* Release block with bitmap */
 246                 rc = ext4_block_set(fs->bdev, &bitmap_block);
 247                 if (rc != EOK) {
 248                         ext4_fs_put_block_group_ref(&bg_ref);
 249                         return rc;
 250                 }
 251
 252                 uint32_t block_size = ext4_sb_get_block_size(sb);
 253
 254                 /* Update superblock free blocks count */
 255                 uint64_t sb_free_blocks = ext4_sb_get_free_blocks_cnt(sb);
 256                 sb_free_blocks += free_cnt;
 257                 ext4_sb_set_free_blocks_cnt(sb, sb_free_blocks);
 258
 259                 /* Update inode blocks count */
 260                 uint64_t ino_blocks =
 261                     ext4_inode_get_blocks_count(sb, inode_ref->inode);
 262                 ino_blocks -= free_cnt * (block_size / EXT4_INODE_BLOCK_SIZE);
 263                 ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
 264                 inode_ref->dirty = true;
 265
 266                 /* Update block group free blocks count */
 267                 uint32_t free_blocks =
 268                     ext4_bg_get_free_blocks_count(bg_ref.block_group, sb);
 269                 free_blocks += free_cnt;
 270                 ext4_bg_set_free_blocks_count(bg_ref.block_group, sb,
 271                                               free_blocks);
 272                 bg_ref.dirty = true;
 273
 274                 /* Release block group reference */
 275                 rc = ext4_fs_put_block_group_ref(&bg_ref);
 276                 if (rc != EOK)
 277                         break;
 278
 279                 block_group_first++;
 280         }
 281
 282         /*All blocks should be released*/
 283         ext4_assert(count == 0);
 284         return rc;
 285 }
 286
 287 int ext4_balloc_alloc_block(struct ext4_inode_ref *inode_ref,
 288                             ext4_fsblk_t goal,
 289                             ext4_fsblk_t *fblock)
 290 {
 291         ext4_fsblk_t allocated_block = 0;
 292         ext4_fsblk_t bitmap_block_addr;
 293         uint32_t rel_block_idx = 0;
 294         uint64_t free_blocks;
 295         struct ext4_block bitmap_block;
 296         int rc;
 297
 298         struct ext4_sblock *sb = &inode_ref->fs->sb;
 299
 300         /* Load block group number for goal and relative index */
 301         uint32_t block_group = ext4_balloc_get_bgid_of_block(sb, goal);
 302         uint32_t index_in_group = ext4_fs_baddr2_index_in_group(sb, goal);
 303
 304         /* Load block group reference */
 305         struct ext4_block_group_ref bg_ref;
 306         rc = ext4_fs_get_block_group_ref(inode_ref->fs, block_group, &bg_ref);
 307         if (rc != EOK)
 308                 return rc;
 309
 310         free_blocks = ext4_bg_get_free_blocks_count(bg_ref.block_group, sb);
 311         if (free_blocks == 0) {
 312                 /* This group has no free blocks */
 313                 goto goal_failed;
 314         }
 315
 316         /* Compute indexes */
 317         ext4_fsblk_t first_in_group = ext4_balloc_get_block_of_bgid(sb, bg_ref.index);
 318
 319         uint32_t first_in_group_index =
 320             ext4_fs_baddr2_index_in_group(sb, first_in_group);
 321
 322         if (index_in_group < first_in_group_index)
 323                 index_in_group = first_in_group_index;
 324
 325         /* Load block with bitmap */
 326         bitmap_block_addr = ext4_bg_get_block_bitmap(bg_ref.block_group, sb);
 327
 328         rc = ext4_block_get(inode_ref->fs->bdev, &bitmap_block,
 329                             bitmap_block_addr);
 330         if (rc != EOK) {
 331                 ext4_fs_put_block_group_ref(&bg_ref);
 332                 return rc;
 333         }
 334
 335         /* Check if goal is free */
 336         if (ext4_bmap_is_bit_clr(bitmap_block.data, index_in_group)) {
 337                 ext4_bmap_bit_set(bitmap_block.data, index_in_group);
 338                 ext4_balloc_set_bitmap_csum(sb, bg_ref.block_group,
 339                                             bitmap_block.data);
 340                 bitmap_block.dirty = true;
 341                 rc = ext4_block_set(inode_ref->fs->bdev, &bitmap_block);
 342                 if (rc != EOK) {
 343                         ext4_fs_put_block_group_ref(&bg_ref);
 344                         return rc;
 345                 }
 346
 347                 allocated_block = ext4_fs_index_in_group2_baddr(
 348                     sb, index_in_group, block_group);
 349
 350                 goto success;
 351         }
 352
 353         uint32_t blocks_in_group = ext4_blocks_in_group_cnt(sb, block_group);
 354
 355         uint32_t end_idx = (index_in_group + 63) & ~63;
 356         if (end_idx > blocks_in_group)
 357                 end_idx = blocks_in_group;
 358
 359         /* Try to find free block near to goal */
 360         uint32_t tmp_idx;
 361         for (tmp_idx = index_in_group + 1; tmp_idx < end_idx; ++tmp_idx) {
 362                 if (ext4_bmap_is_bit_clr(bitmap_block.data, tmp_idx)) {
 363                         ext4_bmap_bit_set(bitmap_block.data, tmp_idx);
 364
 365                         ext4_balloc_set_bitmap_csum(sb, bg_ref.block_group,
 366                                                     bitmap_block.data);
 367                         bitmap_block.dirty = true;
 368                         rc = ext4_block_set(inode_ref->fs->bdev, &bitmap_block);
 369                         if (rc != EOK)
 370                                 return rc;
 371
 372                         allocated_block = ext4_fs_index_in_group2_baddr(
 373                             sb, tmp_idx, block_group);
 374
 375                         goto success;
 376                 }
 377         }
 378
 379         /* Find free bit in bitmap */
 380         rc = ext4_bmap_bit_find_clr(bitmap_block.data, index_in_group,
 381                                     blocks_in_group, &rel_block_idx);
 382         if (rc == EOK) {
 383                 ext4_bmap_bit_set(bitmap_block.data, rel_block_idx);
 384                 ext4_balloc_set_bitmap_csum(sb, bg_ref.block_group,
 385                                             bitmap_block.data);
 386                 bitmap_block.dirty = true;
 387                 rc = ext4_block_set(inode_ref->fs->bdev, &bitmap_block);
 388                 if (rc != EOK)
 389                         return rc;
 390
 391                 allocated_block = ext4_fs_index_in_group2_baddr(
 392                     sb, rel_block_idx, block_group);
 393
 394                 goto success;
 395         }
 396
 397         /* No free block found yet */
 398         rc = ext4_block_set(inode_ref->fs->bdev, &bitmap_block);
 399         if (rc != EOK) {
 400                 ext4_fs_put_block_group_ref(&bg_ref);
 401                 return rc;
 402         }
 403
 404 goal_failed:
 405
 406         rc = ext4_fs_put_block_group_ref(&bg_ref);
 407         if (rc != EOK)
 408                 return rc;
 409
 410         /* Try other block groups */
 411         uint32_t block_group_count = ext4_block_group_cnt(sb);
 412
 413         uint32_t bgid = (block_group + 1) % block_group_count;
 414         uint32_t count = block_group_count;
 415
 416         while (count > 0) {
 417                 rc = ext4_fs_get_block_group_ref(inode_ref->fs, bgid, &bg_ref);
 418                 if (rc != EOK)
 419                         return rc;
 420
 421                 free_blocks =
 422                     ext4_bg_get_free_blocks_count(bg_ref.block_group, sb);
 423                 if (free_blocks == 0) {
 424                         /* This group has no free blocks */
 425                         goto next_group;
 426                 }
 427
 428                 /* Load block with bitmap */
 429                 bitmap_block_addr =
 430                     ext4_bg_get_block_bitmap(bg_ref.block_group, sb);
 431
 432                 rc = ext4_block_get(inode_ref->fs->bdev, &bitmap_block,
 433                                     bitmap_block_addr);
 434
 435                 if (rc != EOK) {
 436                         ext4_fs_put_block_group_ref(&bg_ref);
 437                         return rc;
 438                 }
 439
 440                 /* Compute indexes */
 441                 first_in_group = ext4_balloc_get_block_of_bgid(sb, bgid);
 442                 index_in_group =
 443                     ext4_fs_baddr2_index_in_group(sb, first_in_group);
 444                 blocks_in_group = ext4_blocks_in_group_cnt(sb, bgid);
 445
 446                 first_in_group_index =
 447                     ext4_fs_baddr2_index_in_group(sb, first_in_group);
 448
 449                 if (index_in_group < first_in_group_index)
 450                         index_in_group = first_in_group_index;
 451
 452                 rc = ext4_bmap_bit_find_clr(bitmap_block.data, index_in_group,
 453                                             blocks_in_group, &rel_block_idx);
 454
 455                 if (rc == EOK) {
 456
 457                         ext4_bmap_bit_set(bitmap_block.data, rel_block_idx);
 458
 459                         ext4_balloc_set_bitmap_csum(sb, bg_ref.block_group,
 460                                                     bitmap_block.data);
 461                         bitmap_block.dirty = true;
 462                         rc = ext4_block_set(inode_ref->fs->bdev, &bitmap_block);
 463                         if (rc != EOK) {
 464                                 ext4_fs_put_block_group_ref(&bg_ref);
 465                                 return rc;
 466                         }
 467
 468                         allocated_block = ext4_fs_index_in_group2_baddr(
 469                             sb, rel_block_idx, bgid);
 470
 471                         goto success;
 472                 }
 473
 474                 rc = ext4_block_set(inode_ref->fs->bdev, &bitmap_block);
 475                 if (rc != EOK) {
 476                         ext4_fs_put_block_group_ref(&bg_ref);
 477                         return rc;
 478                 }
 479
 480         next_group:
 481                 rc = ext4_fs_put_block_group_ref(&bg_ref);
 482                 if (rc != EOK) {
 483                         return rc;
 484                 }
 485
 486                 /* Goto next group */
 487                 bgid = (bgid + 1) % block_group_count;
 488                 count--;
 489         }
 490
 491         return ENOSPC;
 492
 493 success:
 494     /* Empty command - because of syntax */
 495     ;
 496
 497         uint32_t block_size = ext4_sb_get_block_size(sb);
 498
 499         /* Update superblock free blocks count */
 500         uint64_t sb_free_blocks = ext4_sb_get_free_blocks_cnt(sb);
 501         sb_free_blocks--;
 502         ext4_sb_set_free_blocks_cnt(sb, sb_free_blocks);
 503
 504         /* Update inode blocks (different block size!) count */
 505         uint64_t ino_blocks = ext4_inode_get_blocks_count(sb, inode_ref->inode);
 506         ino_blocks += block_size / EXT4_INODE_BLOCK_SIZE;
 507         ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
 508         inode_ref->dirty = true;
 509
 510         /* Update block group free blocks count */
 511         uint64_t bg_free_blocks =
 512             ext4_bg_get_free_blocks_count(bg_ref.block_group, sb);
 513         bg_free_blocks--;
 514         ext4_bg_set_free_blocks_count(bg_ref.block_group, sb, bg_free_blocks);
 515
 516         bg_ref.dirty = true;
 517
 518         rc = ext4_fs_put_block_group_ref(&bg_ref);
 519
 520         *fblock = allocated_block;
 521         return rc;
 522 }
 523
 524 int ext4_balloc_try_alloc_block(struct ext4_inode_ref *inode_ref,
 525                                 ext4_fsblk_t baddr, bool *free)
 526 {
 527         int rc;
 528
 529         struct ext4_fs *fs = inode_ref->fs;
 530         struct ext4_sblock *sb = &fs->sb;
 531
 532         /* Compute indexes */
 533         uint32_t block_group = ext4_balloc_get_bgid_of_block(sb, baddr);
 534         uint32_t index_in_group = ext4_fs_baddr2_index_in_group(sb, baddr);
 535
 536         /* Load block group reference */
 537         struct ext4_block_group_ref bg_ref;
 538         rc = ext4_fs_get_block_group_ref(fs, block_group, &bg_ref);
 539         if (rc != EOK)
 540                 return rc;
 541
 542         /* Load block with bitmap */
 543         ext4_fsblk_t bitmap_block_addr =
 544             ext4_bg_get_block_bitmap(bg_ref.block_group, sb);
 545
 546         struct ext4_block bitmap_block;
 547
 548         rc = ext4_block_get(fs->bdev, &bitmap_block, bitmap_block_addr);
 549         if (rc != EOK) {
 550                 ext4_fs_put_block_group_ref(&bg_ref);
 551                 return rc;
 552         }
 553
 554         /* Check if block is free */
 555         *free = ext4_bmap_is_bit_clr(bitmap_block.data, index_in_group);
 556
 557         /* Allocate block if possible */
 558         if (*free) {
 559                 ext4_bmap_bit_set(bitmap_block.data, index_in_group);
 560                 ext4_balloc_set_bitmap_csum(sb, bg_ref.block_group,
 561                                             bitmap_block.data);
 562                 bitmap_block.dirty = true;
 563         }
 564
 565         /* Release block with bitmap */
 566         rc = ext4_block_set(fs->bdev, &bitmap_block);
 567         if (rc != EOK) {
 568                 /* Error in saving bitmap */
 569                 ext4_fs_put_block_group_ref(&bg_ref);
 570                 return rc;
 571         }
 572
 573         /* If block is not free, return */
 574         if (!(*free))
 575                 goto terminate;
 576
 577         uint32_t block_size = ext4_sb_get_block_size(sb);
 578
 579         /* Update superblock free blocks count */
 580         uint64_t sb_free_blocks = ext4_sb_get_free_blocks_cnt(sb);
 581         sb_free_blocks--;
 582         ext4_sb_set_free_blocks_cnt(sb, sb_free_blocks);
 583
 584         /* Update inode blocks count */
 585         uint64_t ino_blocks = ext4_inode_get_blocks_count(sb, inode_ref->inode);
 586         ino_blocks += block_size / EXT4_INODE_BLOCK_SIZE;
 587         ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
 588         inode_ref->dirty = true;
 589
 590         /* Update block group free blocks count */
 591         uint32_t free_blocks =
 592             ext4_bg_get_free_blocks_count(bg_ref.block_group, sb);
 593         free_blocks--;
 594         ext4_bg_set_free_blocks_count(bg_ref.block_group, sb, free_blocks);
 595
 596         bg_ref.dirty = true;
 597
 598 terminate:
 599         return ext4_fs_put_block_group_ref(&bg_ref);
 600 }
 601
 602 /**
 603  * @}
 604  */