source: mainline/uspace/lib/ext4/libext4_balloc.c@ 34bc2fe

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 34bc2fe was 4cdac68, checked in by Frantisek Princ <frantisek.princ@…>, 13 years ago

debugged initialization of block group structures
  • Property mode set to 100644
File size: 19.8 KB
Line 
1/*
2 * Copyright (c) 2012 Frantisek Princ
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup libext4
30 * @{
31 */
32
33/**
34 * @file libext4_balloc.c
35 * @brief Physical block allocator.
36 */
37
38#include <errno.h>
39#include <sys/types.h>
40#include "libext4.h"
41
42/** Compute number of block group from block address.
43 *
44 * @param sb superblock pointer
45 * @param block_addr absolute address of block
46 * @return block group index
47 */
48static uint32_t ext4_balloc_get_bgid_of_block(ext4_superblock_t *sb,
49 uint32_t block_addr)
50{
51 uint32_t blocks_per_group = ext4_superblock_get_blocks_per_group(sb);
52 uint32_t first_block = ext4_superblock_get_first_data_block(sb);
53
54 /* First block == 0 or 1 */
55 if (first_block == 0) {
56 return block_addr / blocks_per_group;
57 } else {
58 return (block_addr - 1) / blocks_per_group;
59 }
60}
61
62
63/** Free block.
64 *
65 * @param inode_ref inode, where the block is allocated
66 * @param block_addr absolute block address to free
67 * @return error code
68 */
69int ext4_balloc_free_block(ext4_inode_ref_t *inode_ref, uint32_t block_addr)
70{
71 int rc;
72
73 ext4_filesystem_t *fs = inode_ref->fs;
74 ext4_superblock_t *sb = fs->superblock;
75
76 /* Compute indexes */
77 uint32_t block_group = ext4_balloc_get_bgid_of_block(sb, block_addr);
78 uint32_t index_in_group =
79 ext4_filesystem_blockaddr2_index_in_group(sb, block_addr);
80
81 /* Load block group reference */
82 ext4_block_group_ref_t *bg_ref;
83 rc = ext4_filesystem_get_block_group_ref(fs, block_group, &bg_ref);
84 if (rc != EOK) {
85 EXT4FS_DBG("error in loading bg_ref \%d", rc);
86 return rc;
87 }
88
89 /* Load block with bitmap */
90 uint32_t bitmap_block_addr = ext4_block_group_get_block_bitmap(
91 bg_ref->block_group, sb);
92 block_t *bitmap_block;
93 rc = block_get(&bitmap_block, fs->device, bitmap_block_addr, 0);
94 if (rc != EOK) {
95 EXT4FS_DBG("error in loading bitmap \%d", rc);
96 return rc;
97 }
98
99 /* Modify bitmap */
100 ext4_bitmap_free_bit(bitmap_block->data, index_in_group);
101 bitmap_block->dirty = true;
102
103
104 /* Release block with bitmap */
105 rc = block_put(bitmap_block);
106 if (rc != EOK) {
107 /* Error in saving bitmap */
108 ext4_filesystem_put_block_group_ref(bg_ref);
109 EXT4FS_DBG("error in saving bitmap \%d", rc);
110 return rc;
111 }
112
113 uint32_t block_size = ext4_superblock_get_block_size(sb);
114
115 /* Update superblock free blocks count */
116 uint32_t sb_free_blocks = ext4_superblock_get_free_blocks_count(sb);
117 sb_free_blocks++;
118 ext4_superblock_set_free_blocks_count(sb, sb_free_blocks);
119
120 /* Update inode blocks count */
121 uint64_t ino_blocks = ext4_inode_get_blocks_count(sb, inode_ref->inode);
122 ino_blocks -= block_size / EXT4_INODE_BLOCK_SIZE;
123 ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
124 inode_ref->dirty = true;
125
126 /* Update block group free blocks count */
127 uint32_t free_blocks = ext4_block_group_get_free_blocks_count(
128 bg_ref->block_group, sb);
129 free_blocks++;
130 ext4_block_group_set_free_blocks_count(bg_ref->block_group,
131 sb, free_blocks);
132 bg_ref->dirty = true;
133
134 /* Release block group reference */
135 rc = ext4_filesystem_put_block_group_ref(bg_ref);
136 if (rc != EOK) {
137 EXT4FS_DBG("error in saving bg_ref \%d", rc);
138 return rc;
139 }
140
141 return EOK;
142}
143
144
145/** Free continuous set of blocks.
146 *
147 * @param inode_ref inode, where the blocks are allocated
148 * @param first first block to release
149 * @param count number of blocks to release
150 */
151int ext4_balloc_free_blocks(ext4_inode_ref_t *inode_ref,
152 uint32_t first, uint32_t count)
153{
154 int rc;
155
156 ext4_filesystem_t *fs = inode_ref->fs;
157 ext4_superblock_t *sb = fs->superblock;
158
159 /* Compute indexes */
160 uint32_t block_group_first =
161 ext4_balloc_get_bgid_of_block(sb, first);
162 uint32_t block_group_last =
163 ext4_balloc_get_bgid_of_block(sb, first + count - 1);
164
165 assert(block_group_first == block_group_last);
166
167 /* Load block group reference */
168 ext4_block_group_ref_t *bg_ref;
169 rc = ext4_filesystem_get_block_group_ref(fs, block_group_first, &bg_ref);
170 if (rc != EOK) {
171 EXT4FS_DBG("error in loading bg_ref \%d", rc);
172 return rc;
173 }
174
175 uint32_t index_in_group_first =
176 ext4_filesystem_blockaddr2_index_in_group(sb, first);
177
178
179 /* Load block with bitmap */
180 uint32_t bitmap_block_addr = ext4_block_group_get_block_bitmap(
181 bg_ref->block_group, sb);
182
183 block_t *bitmap_block;
184 rc = block_get(&bitmap_block, fs->device, bitmap_block_addr, 0);
185 if (rc != EOK) {
186 EXT4FS_DBG("error in loading bitmap \%d", rc);
187 return rc;
188 }
189
190 /* Modify bitmap */
191 ext4_bitmap_free_bits(bitmap_block->data, index_in_group_first, count);
192 bitmap_block->dirty = true;
193
194 /* Release block with bitmap */
195 rc = block_put(bitmap_block);
196 if (rc != EOK) {
197 /* Error in saving bitmap */
198 ext4_filesystem_put_block_group_ref(bg_ref);
199 EXT4FS_DBG("error in saving bitmap \%d", rc);
200 return rc;
201 }
202
203 uint32_t block_size = ext4_superblock_get_block_size(sb);
204
205 /* Update superblock free blocks count */
206 uint32_t sb_free_blocks = ext4_superblock_get_free_blocks_count(sb);
207 sb_free_blocks += count;
208 ext4_superblock_set_free_blocks_count(sb, sb_free_blocks);
209
210 /* Update inode blocks count */
211 uint64_t ino_blocks = ext4_inode_get_blocks_count(sb, inode_ref->inode);
212 ino_blocks -= count * (block_size / EXT4_INODE_BLOCK_SIZE);
213 ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
214 inode_ref->dirty = true;
215
216 /* Update block group free blocks count */
217 uint32_t free_blocks = ext4_block_group_get_free_blocks_count(
218 bg_ref->block_group, sb);
219 free_blocks += count;
220 ext4_block_group_set_free_blocks_count(bg_ref->block_group,
221 sb, free_blocks);
222 bg_ref->dirty = true;
223
224 /* Release block group reference */
225 rc = ext4_filesystem_put_block_group_ref(bg_ref);
226 if (rc != EOK) {
227 EXT4FS_DBG("error in saving bg_ref \%d", rc);
228 return rc;
229 }
230
231 return EOK;
232}
233
234/** Compute first block for data in block group.
235 *
236 * @param sb pointer to superblock
237 * @param bg pointer to block group
238 * @param bgid index of block group
239 * @return absolute block index of first block
240 */
241uint32_t ext4_balloc_get_first_data_block_in_group(
242 ext4_superblock_t *sb, ext4_block_group_ref_t *bg_ref)
243{
244 uint32_t block_group_count = ext4_superblock_get_block_group_count(sb);
245 uint32_t inode_table_first_block = ext4_block_group_get_inode_table_first_block(
246 bg_ref->block_group, sb);
247 uint16_t inode_table_item_size = ext4_superblock_get_inode_size(sb);
248 uint32_t inodes_per_group = ext4_superblock_get_inodes_per_group(sb);
249 uint32_t block_size = ext4_superblock_get_block_size(sb);
250 uint32_t inode_table_bytes;
251
252 if (bg_ref->index < block_group_count - 1) {
253 inode_table_bytes = inodes_per_group * inode_table_item_size;
254 } else {
255 /* last block group could be smaller */
256 uint32_t inodes_count_total = ext4_superblock_get_inodes_count(sb);
257 inode_table_bytes =
258 (inodes_count_total - ((block_group_count - 1) * inodes_per_group))
259 * inode_table_item_size;
260 }
261
262 uint32_t inode_table_blocks = inode_table_bytes / block_size;
263
264 if (inode_table_bytes % block_size) {
265 inode_table_blocks++;
266 }
267
268 return inode_table_first_block + inode_table_blocks;
269}
270
271/** Compute 'goal' for allocation algorithm.
272 *
273 * @param inode_ref reference to inode, to allocate block for
274 * @return goal block number
275 */
276static uint32_t ext4_balloc_find_goal(ext4_inode_ref_t *inode_ref)
277{
278 int rc;
279 uint32_t goal = 0;
280
281 ext4_superblock_t *sb = inode_ref->fs->superblock;
282
283 uint64_t inode_size = ext4_inode_get_size(sb, inode_ref->inode);
284 uint32_t block_size = ext4_superblock_get_block_size(sb);
285 uint32_t inode_block_count = inode_size / block_size;
286
287 if (inode_size % block_size != 0) {
288 inode_block_count++;
289 }
290
291 /* If inode has some blocks, get last block address + 1 */
292 if (inode_block_count > 0) {
293
294 rc = ext4_filesystem_get_inode_data_block_index(inode_ref, inode_block_count - 1, &goal);
295 if (rc != EOK) {
296 return 0;
297 }
298
299 if (goal != 0) {
300 goal++;
301 return goal;
302 }
303
304 /* if goal == 0, sparse file -> continue */
305 }
306
307 /* Identify block group of inode */
308 uint32_t inodes_per_group = ext4_superblock_get_inodes_per_group(sb);
309 uint32_t block_group = (inode_ref->index - 1) / inodes_per_group;
310 block_size = ext4_superblock_get_block_size(sb);
311
312 /* Load block group reference */
313 ext4_block_group_ref_t *bg_ref;
314 rc = ext4_filesystem_get_block_group_ref(inode_ref->fs, block_group, &bg_ref);
315 if (rc != EOK) {
316 return 0;
317 }
318
319 /* Compute indexes */
320 uint32_t block_group_count = ext4_superblock_get_block_group_count(sb);
321 uint32_t inode_table_first_block = ext4_block_group_get_inode_table_first_block(
322 bg_ref->block_group, sb);
323 uint16_t inode_table_item_size = ext4_superblock_get_inode_size(sb);
324 uint32_t inode_table_bytes;
325
326 /* Check for last block group */
327 if (block_group < block_group_count - 1) {
328 inode_table_bytes = inodes_per_group * inode_table_item_size;
329 } else {
330 /* last block group could be smaller */
331 uint32_t inodes_count_total = ext4_superblock_get_inodes_count(sb);
332 inode_table_bytes =
333 (inodes_count_total - ((block_group_count - 1) * inodes_per_group))
334 * inode_table_item_size;
335 }
336
337 uint32_t inode_table_blocks = inode_table_bytes / block_size;
338
339 if (inode_table_bytes % block_size) {
340 inode_table_blocks++;
341 }
342
343 goal = inode_table_first_block + inode_table_blocks;
344
345 ext4_filesystem_put_block_group_ref(bg_ref);
346
347 return goal;
348}
349
350/** Data block allocation algorithm.
351 *
352 * @param inode_ref inode to allocate block for
353 * @param fblock allocated block address
354 * @return error code
355 */
356int ext4_balloc_alloc_block(
357 ext4_inode_ref_t *inode_ref, uint32_t *fblock)
358{
359 int rc;
360 uint32_t allocated_block = 0;
361
362 uint32_t bitmap_block_addr;
363 block_t *bitmap_block;
364 uint32_t rel_block_idx = 0;
365
366 /* Find GOAL */
367 uint32_t goal = ext4_balloc_find_goal(inode_ref);
368 if (goal == 0) {
369 /* no goal found => partition is full */
370 EXT4FS_DBG("ERROR (goal == 0)");
371 return ENOSPC;
372 }
373
374 ext4_superblock_t *sb = inode_ref->fs->superblock;
375
376 /* Load block group number for goal and relative index */
377 uint32_t block_group = ext4_balloc_get_bgid_of_block(sb, goal);
378 uint32_t index_in_group =
379 ext4_filesystem_blockaddr2_index_in_group(sb, goal);
380
381
382 /* Load block group reference */
383 ext4_block_group_ref_t *bg_ref;
384 rc = ext4_filesystem_get_block_group_ref(inode_ref->fs, block_group, &bg_ref);
385 if (rc != EOK) {
386 EXT4FS_DBG("initial BG ref not loaded");
387 return rc;
388 }
389
390 /* Compute indexes */
391 uint32_t first_in_group =
392 ext4_balloc_get_first_data_block_in_group(sb, bg_ref);
393
394 uint32_t first_in_group_index = ext4_filesystem_blockaddr2_index_in_group(
395 sb, first_in_group);
396
397 if (index_in_group < first_in_group_index) {
398 index_in_group = first_in_group_index;
399 }
400
401 /* Load block with bitmap */
402 bitmap_block_addr = ext4_block_group_get_block_bitmap(
403 bg_ref->block_group, sb);
404
405 rc = block_get(&bitmap_block, inode_ref->fs->device,
406 bitmap_block_addr, BLOCK_FLAGS_NONE);
407 if (rc != EOK) {
408 ext4_filesystem_put_block_group_ref(bg_ref);
409 EXT4FS_DBG("initial bitmap not loaded");
410 return rc;
411 }
412
413 /* Check if goal is free */
414 if (ext4_bitmap_is_free_bit(bitmap_block->data, index_in_group)) {
415 ext4_bitmap_set_bit(bitmap_block->data, index_in_group);
416 bitmap_block->dirty = true;
417 rc = block_put(bitmap_block);
418 if (rc != EOK) {
419 EXT4FS_DBG("goal check: error in saving bitmap \%d", rc);
420 ext4_filesystem_put_block_group_ref(bg_ref);
421 return rc;
422 }
423
424 allocated_block = ext4_filesystem_index_in_group2blockaddr(
425 sb, index_in_group, block_group);
426
427 goto success;
428
429 }
430
431 uint32_t blocks_in_group = ext4_superblock_get_blocks_in_group(sb, block_group);
432
433 uint32_t end_idx = (index_in_group + 63) & ~63;
434 if (end_idx > blocks_in_group) {
435 end_idx = blocks_in_group;
436 }
437
438 /* Try to find free block near to goal */
439 for (uint32_t tmp_idx = index_in_group + 1; tmp_idx < end_idx; ++tmp_idx) {
440 if (ext4_bitmap_is_free_bit(bitmap_block->data, tmp_idx)) {
441
442 ext4_bitmap_set_bit(bitmap_block->data, tmp_idx);
443 bitmap_block->dirty = true;
444 rc = block_put(bitmap_block);
445 if (rc != EOK) {
446 EXT4FS_DBG("near blocks: error in saving initial bitmap \%d", rc);
447 return rc;
448 }
449
450 allocated_block = ext4_filesystem_index_in_group2blockaddr(
451 sb, tmp_idx, block_group);
452
453 goto success;
454 }
455
456 }
457
458 /* Find free BYTE in bitmap */
459 rc = ext4_bitmap_find_free_byte_and_set_bit(bitmap_block->data, index_in_group, &rel_block_idx, blocks_in_group);
460 if (rc == EOK) {
461 bitmap_block->dirty = true;
462 rc = block_put(bitmap_block);
463 if (rc != EOK) {
464 EXT4FS_DBG("free byte: error in saving initial bitmap \%d", rc);
465 return rc;
466 }
467
468 allocated_block = ext4_filesystem_index_in_group2blockaddr(
469 sb, rel_block_idx, block_group);
470
471 goto success;
472 }
473
474 /* Find free bit in bitmap */
475 rc = ext4_bitmap_find_free_bit_and_set(bitmap_block->data, index_in_group, &rel_block_idx, blocks_in_group);
476 if (rc == EOK) {
477 bitmap_block->dirty = true;
478 rc = block_put(bitmap_block);
479 if (rc != EOK) {
480 EXT4FS_DBG("free bit: error in saving initial bitmap \%d", rc);
481 return rc;
482 }
483
484 allocated_block = ext4_filesystem_index_in_group2blockaddr(
485 sb, rel_block_idx, block_group);
486
487 goto success;
488 }
489
490 /* No free block found yet */
491 block_put(bitmap_block);
492 ext4_filesystem_put_block_group_ref(bg_ref);
493
494 /* Try other block groups */
495 uint32_t block_group_count = ext4_superblock_get_block_group_count(sb);
496
497 uint32_t bgid = (block_group + 1) % block_group_count;
498 uint32_t count = block_group_count;
499
500 while (count > 0) {
501 rc = ext4_filesystem_get_block_group_ref(inode_ref->fs, bgid, &bg_ref);
502 if (rc != EOK) {
503 EXT4FS_DBG("ERROR: unable to load block group \%u", bgid);
504 return rc;
505 }
506
507 /* Load block with bitmap */
508 bitmap_block_addr = ext4_block_group_get_block_bitmap(
509 bg_ref->block_group, sb);
510
511 rc = block_get(&bitmap_block, inode_ref->fs->device, bitmap_block_addr, 0);
512 if (rc != EOK) {
513 ext4_filesystem_put_block_group_ref(bg_ref);
514 EXT4FS_DBG("ERROR: unable to load bitmap block");
515 return rc;
516 }
517
518 /* Compute indexes */
519 first_in_group = ext4_balloc_get_first_data_block_in_group(
520 sb, bg_ref);
521 index_in_group = ext4_filesystem_blockaddr2_index_in_group(sb,
522 first_in_group);
523 blocks_in_group = ext4_superblock_get_blocks_in_group(sb, bgid);
524
525 first_in_group_index = ext4_filesystem_blockaddr2_index_in_group(
526 sb, first_in_group);
527
528 if (index_in_group < first_in_group_index) {
529 index_in_group = first_in_group_index;
530 }
531
532 /* Try to find free byte in bitmap */
533 rc = ext4_bitmap_find_free_byte_and_set_bit(bitmap_block->data, index_in_group, &rel_block_idx, blocks_in_group);
534 if (rc == EOK) {
535 bitmap_block->dirty = true;
536 rc = block_put(bitmap_block);
537 if (rc != EOK) {
538 EXT4FS_DBG("ERROR: unable to save bitmap block");
539 return rc;
540 }
541
542 allocated_block = ext4_filesystem_index_in_group2blockaddr(
543 sb, rel_block_idx, bgid);
544
545 goto success;
546 }
547
548 /* Try to find free bit in bitmap */
549 rc = ext4_bitmap_find_free_bit_and_set(bitmap_block->data, index_in_group, &rel_block_idx, blocks_in_group);
550 if (rc == EOK) {
551 bitmap_block->dirty = true;
552 rc = block_put(bitmap_block);
553 if (rc != EOK) {
554 EXT4FS_DBG("ERROR: unable to save bitmap block");
555 return rc;
556 }
557
558 allocated_block = ext4_filesystem_index_in_group2blockaddr(
559 sb, rel_block_idx, bgid);
560
561 goto success;
562 }
563
564 block_put(bitmap_block);
565 ext4_filesystem_put_block_group_ref(bg_ref);
566
567 /* Goto next group */
568 bgid = (bgid + 1) % block_group_count;
569 count--;
570 }
571
572 return ENOSPC;
573
574success:
575 ; /* Empty command - because of syntax */
576
577 uint32_t block_size = ext4_superblock_get_block_size(sb);
578
579 /* Update superblock free blocks count */
580 uint32_t sb_free_blocks = ext4_superblock_get_free_blocks_count(sb);
581 sb_free_blocks--;
582 ext4_superblock_set_free_blocks_count(sb, sb_free_blocks);
583
584 /* Update inode blocks (different block size!) 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 bg_free_blocks = ext4_block_group_get_free_blocks_count(
592 bg_ref->block_group, sb);
593 bg_free_blocks--;
594 ext4_block_group_set_free_blocks_count(bg_ref->block_group, sb, bg_free_blocks);
595 bg_ref->dirty = true;
596
597 ext4_filesystem_put_block_group_ref(bg_ref);
598
599 *fblock = allocated_block;
600 return EOK;
601}
602
603/** Try to allocate concrete block.
604 *
605 * @param inode_ref inode to allocate block for
606 * @param fblock block address to allocate
607 * @param free output value - if target block is free
608 * @return error code
609 */
610int ext4_balloc_try_alloc_block(ext4_inode_ref_t *inode_ref,
611 uint32_t fblock, bool *free)
612{
613 int rc = EOK;
614
615 ext4_filesystem_t *fs = inode_ref->fs;
616 ext4_superblock_t *sb = fs->superblock;
617
618 /* Compute indexes */
619 uint32_t block_group = ext4_balloc_get_bgid_of_block(sb, fblock);
620 uint32_t index_in_group =
621 ext4_filesystem_blockaddr2_index_in_group(sb, fblock);
622
623 /* Load block group reference */
624 ext4_block_group_ref_t *bg_ref;
625 rc = ext4_filesystem_get_block_group_ref(fs, block_group, &bg_ref);
626 if (rc != EOK) {
627 EXT4FS_DBG("error in loading bg_ref \%d", rc);
628 return rc;
629 }
630
631 /* Load block with bitmap */
632 uint32_t bitmap_block_addr = ext4_block_group_get_block_bitmap(
633 bg_ref->block_group, sb);
634 block_t *bitmap_block;
635 rc = block_get(&bitmap_block, fs->device, bitmap_block_addr, 0);
636 if (rc != EOK) {
637 EXT4FS_DBG("error in loading bitmap \%d", rc);
638 return rc;
639 }
640
641 /* Check if block is free */
642 *free = ext4_bitmap_is_free_bit(bitmap_block->data, index_in_group);
643
644 /* Allocate block if possible */
645 if (*free) {
646 ext4_bitmap_set_bit(bitmap_block->data, index_in_group);
647 bitmap_block->dirty = true;
648 }
649
650 /* Release block with bitmap */
651 rc = block_put(bitmap_block);
652 if (rc != EOK) {
653 /* Error in saving bitmap */
654 ext4_filesystem_put_block_group_ref(bg_ref);
655 EXT4FS_DBG("error in saving bitmap \%d", rc);
656 return rc;
657 }
658
659 /* If block is not free, return */
660 if (!(*free)) {
661 goto terminate;
662 }
663
664 uint32_t block_size = ext4_superblock_get_block_size(sb);
665
666 /* Update superblock free blocks count */
667 uint32_t sb_free_blocks = ext4_superblock_get_free_blocks_count(sb);
668 sb_free_blocks--;
669 ext4_superblock_set_free_blocks_count(sb, sb_free_blocks);
670
671 /* Update inode blocks count */
672 uint64_t ino_blocks = ext4_inode_get_blocks_count(sb, inode_ref->inode);
673 ino_blocks += block_size / EXT4_INODE_BLOCK_SIZE;
674 ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
675 inode_ref->dirty = true;
676
677 /* Update block group free blocks count */
678 uint32_t free_blocks = ext4_block_group_get_free_blocks_count(
679 bg_ref->block_group, sb);
680 free_blocks--;
681 ext4_block_group_set_free_blocks_count(bg_ref->block_group,
682 sb, free_blocks);
683 bg_ref->dirty = true;
684
685terminate:
686
687 rc = ext4_filesystem_put_block_group_ref(bg_ref);
688 if (rc != EOK) {
689 EXT4FS_DBG("error in saving bg_ref \%d", rc);
690 return rc;
691 }
692
693 return rc;
694}
695
696/**
697 * @}
698 */
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