source: mainline/uspace/lib/ext4/src/balloc.c@ e54bbde5

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since e54bbde5 was 7c3fb9b, checked in by Jiri Svoboda <jiri@…>, 7 years ago

Fix block comment formatting (ccheck).
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File size: 19.1 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 * @file balloc.c
34 * @brief Physical block allocator.
35 */
36
37#include <errno.h>
38#include <stdbool.h>
39#include <stdint.h>
40#include "ext4/balloc.h"
41#include "ext4/bitmap.h"
42#include "ext4/block_group.h"
43#include "ext4/filesystem.h"
44#include "ext4/inode.h"
45#include "ext4/superblock.h"
46#include "ext4/types.h"
47
48/** Free block.
49 *
50 * @param inode_ref Inode, where the block is allocated
51 * @param block_addr Absolute block address to free
52 *
53 * @return Error code
54 *
55 */
56errno_t ext4_balloc_free_block(ext4_inode_ref_t *inode_ref, uint32_t block_addr)
57{
58 ext4_filesystem_t *fs = inode_ref->fs;
59 ext4_superblock_t *sb = fs->superblock;
60
61 /* Compute indexes */
62 uint32_t block_group = ext4_filesystem_blockaddr2group(sb, block_addr);
63 uint32_t index_in_group =
64 ext4_filesystem_blockaddr2_index_in_group(sb, block_addr);
65
66 /* Load block group reference */
67 ext4_block_group_ref_t *bg_ref;
68 errno_t rc = ext4_filesystem_get_block_group_ref(fs, block_group, &bg_ref);
69 if (rc != EOK)
70 return rc;
71
72 /* Load block with bitmap */
73 uint32_t bitmap_block_addr =
74 ext4_block_group_get_block_bitmap(bg_ref->block_group, sb);
75 block_t *bitmap_block;
76 rc = block_get(&bitmap_block, fs->device, bitmap_block_addr, 0);
77 if (rc != EOK) {
78 ext4_filesystem_put_block_group_ref(bg_ref);
79 return rc;
80 }
81
82 /* Modify bitmap */
83 ext4_bitmap_free_bit(bitmap_block->data, index_in_group);
84 bitmap_block->dirty = true;
85
86 /* Release block with bitmap */
87 rc = block_put(bitmap_block);
88 if (rc != EOK) {
89 /* Error in saving bitmap */
90 ext4_filesystem_put_block_group_ref(bg_ref);
91 return rc;
92 }
93
94 uint32_t block_size = ext4_superblock_get_block_size(sb);
95
96 /* Update superblock free blocks count */
97 uint32_t sb_free_blocks =
98 ext4_superblock_get_free_blocks_count(sb);
99 sb_free_blocks++;
100 ext4_superblock_set_free_blocks_count(sb, sb_free_blocks);
101
102 /* Update inode blocks count */
103 uint64_t ino_blocks =
104 ext4_inode_get_blocks_count(sb, inode_ref->inode);
105 ino_blocks -= block_size / EXT4_INODE_BLOCK_SIZE;
106 ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
107 inode_ref->dirty = true;
108
109 /* Update block group free blocks count */
110 uint32_t free_blocks =
111 ext4_block_group_get_free_blocks_count(bg_ref->block_group, sb);
112 free_blocks++;
113 ext4_block_group_set_free_blocks_count(bg_ref->block_group,
114 sb, free_blocks);
115 bg_ref->dirty = true;
116
117 /* Release block group reference */
118 return ext4_filesystem_put_block_group_ref(bg_ref);
119}
120
121static errno_t ext4_balloc_free_blocks_internal(ext4_inode_ref_t *inode_ref,
122 uint32_t first, uint32_t count)
123{
124 ext4_filesystem_t *fs = inode_ref->fs;
125 ext4_superblock_t *sb = fs->superblock;
126
127 /* Compute indexes */
128 uint32_t block_group_first = ext4_filesystem_blockaddr2group(sb,
129 first);
130 uint32_t block_group_last = ext4_filesystem_blockaddr2group(sb,
131 first + count - 1);
132
133 assert(block_group_first == block_group_last);
134
135 /* Load block group reference */
136 ext4_block_group_ref_t *bg_ref;
137 errno_t rc = ext4_filesystem_get_block_group_ref(fs, block_group_first, &bg_ref);
138 if (rc != EOK)
139 return rc;
140
141 uint32_t index_in_group_first =
142 ext4_filesystem_blockaddr2_index_in_group(sb, first);
143
144 /* Load block with bitmap */
145 uint32_t bitmap_block_addr =
146 ext4_block_group_get_block_bitmap(bg_ref->block_group, sb);
147
148 block_t *bitmap_block;
149 rc = block_get(&bitmap_block, fs->device, bitmap_block_addr, 0);
150 if (rc != EOK) {
151 ext4_filesystem_put_block_group_ref(bg_ref);
152 return rc;
153 }
154
155 /* Modify bitmap */
156 ext4_bitmap_free_bits(bitmap_block->data, index_in_group_first, count);
157 bitmap_block->dirty = true;
158
159 /* Release block with bitmap */
160 rc = block_put(bitmap_block);
161 if (rc != EOK) {
162 /* Error in saving bitmap */
163 ext4_filesystem_put_block_group_ref(bg_ref);
164 return rc;
165 }
166
167 uint32_t block_size = ext4_superblock_get_block_size(sb);
168
169 /* Update superblock free blocks count */
170 uint32_t sb_free_blocks =
171 ext4_superblock_get_free_blocks_count(sb);
172 sb_free_blocks += count;
173 ext4_superblock_set_free_blocks_count(sb, sb_free_blocks);
174
175 /* Update inode blocks count */
176 uint64_t ino_blocks =
177 ext4_inode_get_blocks_count(sb, inode_ref->inode);
178 ino_blocks -= count * (block_size / EXT4_INODE_BLOCK_SIZE);
179 ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
180 inode_ref->dirty = true;
181
182 /* Update block group free blocks count */
183 uint32_t free_blocks =
184 ext4_block_group_get_free_blocks_count(bg_ref->block_group, sb);
185 free_blocks += count;
186 ext4_block_group_set_free_blocks_count(bg_ref->block_group,
187 sb, free_blocks);
188 bg_ref->dirty = true;
189
190 /* Release block group reference */
191 return ext4_filesystem_put_block_group_ref(bg_ref);
192}
193
194/** Free continuous set of blocks.
195 *
196 * @param inode_ref Inode, where the blocks are allocated
197 * @param first First block to release
198 * @param count Number of blocks to release
199 *
200 */
201errno_t ext4_balloc_free_blocks(ext4_inode_ref_t *inode_ref,
202 uint32_t first, uint32_t count)
203{
204 errno_t r;
205 uint32_t gid;
206 uint64_t limit;
207 ext4_filesystem_t *fs = inode_ref->fs;
208 ext4_superblock_t *sb = fs->superblock;
209
210 while (count) {
211 gid = ext4_filesystem_blockaddr2group(sb, first);
212 limit = ext4_filesystem_index_in_group2blockaddr(sb, 0,
213 gid + 1);
214
215 if ((first + count) >= limit) {
216 /*
217 * This extent spans over 2 or more block groups,
218 * we'll break it into smaller parts.
219 */
220 uint32_t s = limit - first;
221
222 r = ext4_balloc_free_blocks_internal(inode_ref,
223 first, s);
224 if (r != EOK)
225 return r;
226
227 first = limit;
228 count -= s;
229 } else {
230 return ext4_balloc_free_blocks_internal(inode_ref,
231 first, count);
232 }
233 }
234
235 return EOK;
236}
237
238/** Compute first block for data in block group.
239 *
240 * @param sb Pointer to superblock
241 * @param bg Pointer to block group
242 * @param bgid Index of block group
243 *
244 * @return Absolute block index of first block
245 *
246 */
247uint32_t ext4_balloc_get_first_data_block_in_group(ext4_superblock_t *sb,
248 ext4_block_group_ref_t *bg_ref)
249{
250 uint32_t r;
251 uint64_t itable = ext4_block_group_get_inode_table_first_block(
252 bg_ref->block_group, sb);
253 uint32_t itable_sz = ext4_filesystem_bg_get_itable_size(sb, bg_ref);
254
255 if (!ext4_superblock_has_feature_incompatible(sb,
256 EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
257 /*
258 * If we are not using FLEX_BG, the first data block
259 * is always after the inode table.
260 */
261 r = itable + itable_sz;
262 return ext4_filesystem_blockaddr2_index_in_group(sb, r);
263 }
264
265 uint64_t bbmap = ext4_block_group_get_block_bitmap(bg_ref->block_group,
266 sb);
267 uint64_t ibmap = ext4_block_group_get_inode_bitmap(bg_ref->block_group,
268 sb);
269
270 r = ext4_filesystem_index_in_group2blockaddr(sb, 0, bg_ref->index);
271 r += ext4_filesystem_bg_get_backup_blocks(bg_ref);
272
273 if (ext4_filesystem_blockaddr2group(sb, bbmap) != bg_ref->index)
274 bbmap = -1; /* Invalid */
275
276 if (ext4_filesystem_blockaddr2group(sb, ibmap) != bg_ref->index)
277 ibmap = -1;
278
279 while (true) {
280 if (r == bbmap || r == ibmap)
281 r++;
282 else if (r >= itable && r < (itable + itable_sz))
283 r = itable + itable_sz;
284 else
285 break;
286 }
287
288 return r;
289}
290
291/** Compute 'goal' for allocation algorithm.
292 *
293 * @param inode_ref Reference to inode, to allocate block for
294 *
295 * @return Goal block number
296 *
297 */
298static errno_t ext4_balloc_find_goal(ext4_inode_ref_t *inode_ref, uint32_t *goal)
299{
300 *goal = 0;
301 ext4_superblock_t *sb = inode_ref->fs->superblock;
302
303 uint64_t inode_size = ext4_inode_get_size(sb, inode_ref->inode);
304 uint32_t block_size = ext4_superblock_get_block_size(sb);
305 uint32_t inode_block_count = inode_size / block_size;
306
307 if (inode_size % block_size != 0)
308 inode_block_count++;
309
310 /* If inode has some blocks, get last block address + 1 */
311 if (inode_block_count > 0) {
312 errno_t rc = ext4_filesystem_get_inode_data_block_index(inode_ref,
313 inode_block_count - 1, goal);
314 if (rc != EOK)
315 return rc;
316
317 if (goal != 0) {
318 (*goal)++;
319 return EOK;
320 }
321 /* If goal == 0, sparse file -> continue */
322 }
323
324 /* Identify block group of inode */
325 uint32_t inodes_per_group = ext4_superblock_get_inodes_per_group(sb);
326 uint32_t block_group = (inode_ref->index - 1) / inodes_per_group;
327
328 /* Load block group reference */
329 ext4_block_group_ref_t *bg_ref;
330 errno_t rc = ext4_filesystem_get_block_group_ref(inode_ref->fs,
331 block_group, &bg_ref);
332 if (rc != EOK)
333 return rc;
334
335 *goal = ext4_balloc_get_first_data_block_in_group(sb, bg_ref);
336
337 return ext4_filesystem_put_block_group_ref(bg_ref);
338}
339
340/** Data block allocation algorithm.
341 *
342 * @param inode_ref Inode to allocate block for
343 * @param fblock Allocated block address
344 *
345 * @return Error code
346 *
347 */
348errno_t ext4_balloc_alloc_block(ext4_inode_ref_t *inode_ref, uint32_t *fblock)
349{
350 uint32_t allocated_block = 0;
351
352 uint32_t bitmap_block_addr;
353 block_t *bitmap_block;
354 uint32_t rel_block_idx = 0;
355 uint32_t free_blocks;
356 uint32_t goal;
357 uint32_t block_size;
358
359 /* Find GOAL */
360 errno_t rc = ext4_balloc_find_goal(inode_ref, &goal);
361 if (rc != EOK)
362 return rc;
363
364 ext4_superblock_t *sb = inode_ref->fs->superblock;
365
366 /* Load block group number for goal and relative index */
367 uint32_t block_group = ext4_filesystem_blockaddr2group(sb, goal);
368 uint32_t index_in_group =
369 ext4_filesystem_blockaddr2_index_in_group(sb, goal);
370
371 /* Load block group reference */
372 ext4_block_group_ref_t *bg_ref;
373 rc = ext4_filesystem_get_block_group_ref(inode_ref->fs,
374 block_group, &bg_ref);
375 if (rc != EOK)
376 return rc;
377
378 free_blocks =
379 ext4_block_group_get_free_blocks_count(bg_ref->block_group, sb);
380 if (free_blocks == 0) {
381 /* This group has no free blocks */
382 goto goal_failed;
383 }
384
385 /* Compute indexes */
386 uint32_t first_in_group =
387 ext4_balloc_get_first_data_block_in_group(sb, bg_ref);
388
389 uint32_t first_in_group_index =
390 ext4_filesystem_blockaddr2_index_in_group(sb, first_in_group);
391
392 if (index_in_group < first_in_group_index)
393 index_in_group = first_in_group_index;
394
395 /* Load block with bitmap */
396 bitmap_block_addr =
397 ext4_block_group_get_block_bitmap(bg_ref->block_group, sb);
398
399 rc = block_get(&bitmap_block, inode_ref->fs->device,
400 bitmap_block_addr, BLOCK_FLAGS_NONE);
401 if (rc != EOK) {
402 ext4_filesystem_put_block_group_ref(bg_ref);
403 return rc;
404 }
405
406 /* Check if goal is free */
407 if (ext4_bitmap_is_free_bit(bitmap_block->data, index_in_group)) {
408 ext4_bitmap_set_bit(bitmap_block->data, index_in_group);
409 bitmap_block->dirty = true;
410 rc = block_put(bitmap_block);
411 if (rc != EOK) {
412 ext4_filesystem_put_block_group_ref(bg_ref);
413 return rc;
414 }
415
416 allocated_block =
417 ext4_filesystem_index_in_group2blockaddr(sb, index_in_group,
418 block_group);
419
420 goto success;
421 }
422
423 uint32_t blocks_in_group =
424 ext4_superblock_get_blocks_in_group(sb, block_group);
425
426 uint32_t end_idx = (index_in_group + 63) & ~63;
427 if (end_idx > blocks_in_group)
428 end_idx = blocks_in_group;
429
430 /* Try to find free block near to goal */
431 for (uint32_t tmp_idx = index_in_group + 1; tmp_idx < end_idx;
432 ++tmp_idx) {
433 if (ext4_bitmap_is_free_bit(bitmap_block->data, tmp_idx)) {
434 ext4_bitmap_set_bit(bitmap_block->data, tmp_idx);
435 bitmap_block->dirty = true;
436 rc = block_put(bitmap_block);
437 if (rc != EOK)
438 return rc;
439
440 allocated_block =
441 ext4_filesystem_index_in_group2blockaddr(sb, tmp_idx,
442 block_group);
443
444 goto success;
445 }
446 }
447
448 /* Find free BYTE in bitmap */
449 rc = ext4_bitmap_find_free_byte_and_set_bit(bitmap_block->data,
450 index_in_group, &rel_block_idx, blocks_in_group);
451 if (rc == EOK) {
452 bitmap_block->dirty = true;
453 rc = block_put(bitmap_block);
454 if (rc != EOK)
455 return rc;
456
457 allocated_block =
458 ext4_filesystem_index_in_group2blockaddr(sb, rel_block_idx,
459 block_group);
460
461 goto success;
462 }
463
464 /* Find free bit in bitmap */
465 rc = ext4_bitmap_find_free_bit_and_set(bitmap_block->data,
466 index_in_group, &rel_block_idx, blocks_in_group);
467 if (rc == EOK) {
468 bitmap_block->dirty = true;
469 rc = block_put(bitmap_block);
470 if (rc != EOK)
471 return rc;
472
473 allocated_block =
474 ext4_filesystem_index_in_group2blockaddr(sb, rel_block_idx,
475 block_group);
476
477 goto success;
478 }
479
480 /* No free block found yet */
481 rc = block_put(bitmap_block);
482 if (rc != EOK) {
483 ext4_filesystem_put_block_group_ref(bg_ref);
484 return rc;
485 }
486
487goal_failed:
488
489 rc = ext4_filesystem_put_block_group_ref(bg_ref);
490 if (rc != EOK)
491 return rc;
492
493 /* Try other block groups */
494 uint32_t block_group_count = ext4_superblock_get_block_group_count(sb);
495
496 uint32_t bgid = (block_group + 1) % block_group_count;
497 uint32_t count = block_group_count;
498
499 while (count > 0) {
500 rc = ext4_filesystem_get_block_group_ref(inode_ref->fs, bgid,
501 &bg_ref);
502 if (rc != EOK)
503 return rc;
504
505 free_blocks =
506 ext4_block_group_get_free_blocks_count(bg_ref->block_group, sb);
507 if (free_blocks == 0) {
508 /* This group has no free blocks */
509 goto next_group;
510 }
511
512 /* Load block with bitmap */
513 bitmap_block_addr =
514 ext4_block_group_get_block_bitmap(bg_ref->block_group, sb);
515
516 rc = block_get(&bitmap_block, inode_ref->fs->device,
517 bitmap_block_addr, 0);
518 if (rc != EOK) {
519 ext4_filesystem_put_block_group_ref(bg_ref);
520 return rc;
521 }
522
523 /* Compute indexes */
524 first_in_group =
525 ext4_balloc_get_first_data_block_in_group(sb, bg_ref);
526 index_in_group =
527 ext4_filesystem_blockaddr2_index_in_group(sb, first_in_group);
528 blocks_in_group = ext4_superblock_get_blocks_in_group(sb, bgid);
529
530 first_in_group_index =
531 ext4_filesystem_blockaddr2_index_in_group(sb, first_in_group);
532
533 if (index_in_group < first_in_group_index)
534 index_in_group = first_in_group_index;
535
536 /* Try to find free byte in bitmap */
537 rc = ext4_bitmap_find_free_byte_and_set_bit(bitmap_block->data,
538 index_in_group, &rel_block_idx, blocks_in_group);
539 if (rc == EOK) {
540 bitmap_block->dirty = true;
541 rc = block_put(bitmap_block);
542 if (rc != EOK) {
543 ext4_filesystem_put_block_group_ref(bg_ref);
544 return rc;
545 }
546
547 allocated_block =
548 ext4_filesystem_index_in_group2blockaddr(sb, rel_block_idx,
549 bgid);
550
551 goto success;
552 }
553
554 /* Try to find free bit in bitmap */
555 rc = ext4_bitmap_find_free_bit_and_set(bitmap_block->data,
556 index_in_group, &rel_block_idx, blocks_in_group);
557 if (rc == EOK) {
558 bitmap_block->dirty = true;
559 rc = block_put(bitmap_block);
560 if (rc != EOK) {
561 ext4_filesystem_put_block_group_ref(bg_ref);
562 return rc;
563 }
564
565 allocated_block =
566 ext4_filesystem_index_in_group2blockaddr(sb, rel_block_idx,
567 bgid);
568
569 goto success;
570 }
571
572 rc = block_put(bitmap_block);
573 if (rc != EOK) {
574 ext4_filesystem_put_block_group_ref(bg_ref);
575 return rc;
576 }
577
578 next_group:
579 rc = ext4_filesystem_put_block_group_ref(bg_ref);
580 if (rc != EOK)
581 return rc;
582
583 /* Goto next group */
584 bgid = (bgid + 1) % block_group_count;
585 count--;
586 }
587
588 return ENOSPC;
589
590success:
591 block_size = ext4_superblock_get_block_size(sb);
592
593 /* Update superblock free blocks count */
594 uint32_t sb_free_blocks = ext4_superblock_get_free_blocks_count(sb);
595 sb_free_blocks--;
596 ext4_superblock_set_free_blocks_count(sb, sb_free_blocks);
597
598 /* Update inode blocks (different block size!) count */
599 uint64_t ino_blocks =
600 ext4_inode_get_blocks_count(sb, inode_ref->inode);
601 ino_blocks += block_size / EXT4_INODE_BLOCK_SIZE;
602 ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
603 inode_ref->dirty = true;
604
605 /* Update block group free blocks count */
606 uint32_t bg_free_blocks =
607 ext4_block_group_get_free_blocks_count(bg_ref->block_group, sb);
608 bg_free_blocks--;
609 ext4_block_group_set_free_blocks_count(bg_ref->block_group, sb,
610 bg_free_blocks);
611 bg_ref->dirty = true;
612
613 rc = ext4_filesystem_put_block_group_ref(bg_ref);
614
615 *fblock = allocated_block;
616 return rc;
617}
618
619/** Try to allocate concrete block.
620 *
621 * @param inode_ref Inode to allocate block for
622 * @param fblock Block address to allocate
623 * @param free Output value - if target block is free
624 *
625 * @return Error code
626 *
627 */
628errno_t ext4_balloc_try_alloc_block(ext4_inode_ref_t *inode_ref, uint32_t fblock,
629 bool *free)
630{
631 errno_t rc;
632
633 ext4_filesystem_t *fs = inode_ref->fs;
634 ext4_superblock_t *sb = fs->superblock;
635
636 /* Compute indexes */
637 uint32_t block_group = ext4_filesystem_blockaddr2group(sb, fblock);
638 uint32_t index_in_group =
639 ext4_filesystem_blockaddr2_index_in_group(sb, fblock);
640
641 /* Load block group reference */
642 ext4_block_group_ref_t *bg_ref;
643 rc = ext4_filesystem_get_block_group_ref(fs, block_group, &bg_ref);
644 if (rc != EOK)
645 return rc;
646
647 /* Load block with bitmap */
648 uint32_t bitmap_block_addr =
649 ext4_block_group_get_block_bitmap(bg_ref->block_group, sb);
650 block_t *bitmap_block;
651 rc = block_get(&bitmap_block, fs->device, bitmap_block_addr, 0);
652 if (rc != EOK) {
653 ext4_filesystem_put_block_group_ref(bg_ref);
654 return rc;
655 }
656
657 /* Check if block is free */
658 *free = ext4_bitmap_is_free_bit(bitmap_block->data, index_in_group);
659
660 /* Allocate block if possible */
661 if (*free) {
662 ext4_bitmap_set_bit(bitmap_block->data, index_in_group);
663 bitmap_block->dirty = true;
664 }
665
666 /* Release block with bitmap */
667 rc = block_put(bitmap_block);
668 if (rc != EOK) {
669 /* Error in saving bitmap */
670 ext4_filesystem_put_block_group_ref(bg_ref);
671 return rc;
672 }
673
674 /* If block is not free, return */
675 if (!(*free))
676 goto terminate;
677
678 uint32_t block_size = ext4_superblock_get_block_size(sb);
679
680 /* Update superblock free blocks count */
681 uint32_t sb_free_blocks = ext4_superblock_get_free_blocks_count(sb);
682 sb_free_blocks--;
683 ext4_superblock_set_free_blocks_count(sb, sb_free_blocks);
684
685 /* Update inode blocks count */
686 uint64_t ino_blocks =
687 ext4_inode_get_blocks_count(sb, inode_ref->inode);
688 ino_blocks += block_size / EXT4_INODE_BLOCK_SIZE;
689 ext4_inode_set_blocks_count(sb, inode_ref->inode, ino_blocks);
690 inode_ref->dirty = true;
691
692 /* Update block group free blocks count */
693 uint32_t free_blocks =
694 ext4_block_group_get_free_blocks_count(bg_ref->block_group, sb);
695 free_blocks--;
696 ext4_block_group_set_free_blocks_count(bg_ref->block_group,
697 sb, free_blocks);
698 bg_ref->dirty = true;
699
700terminate:
701 return ext4_filesystem_put_block_group_ref(bg_ref);
702}
703
704/**
705 * @}
706 */
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