1// SPDX-License-Identifier: LGPL-2.1
2/*
3 * Copyright (c) 2012 Taobao.
4 * Written by Tao Ma <boyu.mt@taobao.com>
5 */
6
7#include <linux/iomap.h>
8#include <linux/fiemap.h>
9#include <linux/namei.h>
10#include <linux/iversion.h>
11#include <linux/sched/mm.h>
12
13#include "ext4_jbd2.h"
14#include "ext4.h"
15#include "xattr.h"
16#include "truncate.h"
17
18#define EXT4_XATTR_SYSTEM_DATA "data"
19#define EXT4_MIN_INLINE_DATA_SIZE ((sizeof(__le32) * EXT4_N_BLOCKS))
20#define EXT4_INLINE_DOTDOT_OFFSET 2
21#define EXT4_INLINE_DOTDOT_SIZE 4
22
23
24static int ext4_da_convert_inline_data_to_extent(struct address_space *mapping,
25 struct inode *inode,
26 void **fsdata);
27
28static int ext4_get_inline_size(struct inode *inode)
29{
30 if (EXT4_I(inode)->i_inline_off)
31 return EXT4_I(inode)->i_inline_size;
32
33 return 0;
34}
35
36static int get_max_inline_xattr_value_size(struct inode *inode,
37 struct ext4_iloc *iloc)
38{
39 struct ext4_xattr_ibody_header *header;
40 struct ext4_xattr_entry *entry;
41 struct ext4_inode *raw_inode;
42 void *end;
43 int free, min_offs;
44
45 if (!EXT4_INODE_HAS_XATTR_SPACE(inode))
46 return 0;
47
48 min_offs = EXT4_SB(sb: inode->i_sb)->s_inode_size -
49 EXT4_GOOD_OLD_INODE_SIZE -
50 EXT4_I(inode)->i_extra_isize -
51 sizeof(struct ext4_xattr_ibody_header);
52
53 /*
54 * We need to subtract another sizeof(__u32) since an in-inode xattr
55 * needs an empty 4 bytes to indicate the gap between the xattr entry
56 * and the name/value pair.
57 */
58 if (!ext4_test_inode_state(inode, bit: EXT4_STATE_XATTR))
59 return EXT4_XATTR_SIZE(min_offs -
60 EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA)) -
61 EXT4_XATTR_ROUND - sizeof(__u32));
62
63 raw_inode = ext4_raw_inode(iloc);
64 header = IHDR(inode, raw_inode);
65 entry = IFIRST(header);
66 end = (void *)raw_inode + EXT4_SB(sb: inode->i_sb)->s_inode_size;
67
68 /* Compute min_offs. */
69 while (!IS_LAST_ENTRY(entry)) {
70 void *next = EXT4_XATTR_NEXT(entry);
71
72 if (next >= end) {
73 EXT4_ERROR_INODE(inode,
74 "corrupt xattr in inline inode");
75 return 0;
76 }
77 if (!entry->e_value_inum && entry->e_value_size) {
78 size_t offs = le16_to_cpu(entry->e_value_offs);
79 if (offs < min_offs)
80 min_offs = offs;
81 }
82 entry = next;
83 }
84 free = min_offs -
85 ((void *)entry - (void *)IFIRST(header)) - sizeof(__u32);
86
87 if (EXT4_I(inode)->i_inline_off) {
88 entry = (struct ext4_xattr_entry *)
89 ((void *)raw_inode + EXT4_I(inode)->i_inline_off);
90
91 free += EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size));
92 goto out;
93 }
94
95 free -= EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA));
96
97 if (free > EXT4_XATTR_ROUND)
98 free = EXT4_XATTR_SIZE(free - EXT4_XATTR_ROUND);
99 else
100 free = 0;
101
102out:
103 return free;
104}
105
106/*
107 * Get the maximum size we now can store in an inode.
108 * If we can't find the space for a xattr entry, don't use the space
109 * of the extents since we have no space to indicate the inline data.
110 */
111int ext4_get_max_inline_size(struct inode *inode)
112{
113 int error, max_inline_size;
114 struct ext4_iloc iloc;
115
116 if (EXT4_I(inode)->i_extra_isize == 0)
117 return 0;
118
119 error = ext4_get_inode_loc(inode, &iloc);
120 if (error) {
121 ext4_error_inode_err(inode, __func__, __LINE__, 0, -error,
122 "can't get inode location %lu",
123 inode->i_ino);
124 return 0;
125 }
126
127 down_read(sem: &EXT4_I(inode)->xattr_sem);
128 max_inline_size = get_max_inline_xattr_value_size(inode, iloc: &iloc);
129 up_read(sem: &EXT4_I(inode)->xattr_sem);
130
131 brelse(bh: iloc.bh);
132
133 if (!max_inline_size)
134 return 0;
135
136 return max_inline_size + EXT4_MIN_INLINE_DATA_SIZE;
137}
138
139/*
140 * this function does not take xattr_sem, which is OK because it is
141 * currently only used in a code path coming form ext4_iget, before
142 * the new inode has been unlocked
143 */
144int ext4_find_inline_data_nolock(struct inode *inode)
145{
146 struct ext4_xattr_ibody_find is = {
147 .s = { .not_found = -ENODATA, },
148 };
149 struct ext4_xattr_info i = {
150 .name_index = EXT4_XATTR_INDEX_SYSTEM,
151 .name = EXT4_XATTR_SYSTEM_DATA,
152 };
153 int error;
154
155 if (EXT4_I(inode)->i_extra_isize == 0)
156 return 0;
157
158 error = ext4_get_inode_loc(inode, &is.iloc);
159 if (error)
160 return error;
161
162 error = ext4_xattr_ibody_find(inode, i: &i, is: &is);
163 if (error)
164 goto out;
165
166 if (!is.s.not_found) {
167 if (is.s.here->e_value_inum) {
168 EXT4_ERROR_INODE(inode, "inline data xattr refers "
169 "to an external xattr inode");
170 error = -EFSCORRUPTED;
171 goto out;
172 }
173 EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
174 (void *)ext4_raw_inode(iloc: &is.iloc));
175 EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE +
176 le32_to_cpu(is.s.here->e_value_size);
177 }
178out:
179 brelse(bh: is.iloc.bh);
180 return error;
181}
182
183static int ext4_read_inline_data(struct inode *inode, void *buffer,
184 unsigned int len,
185 struct ext4_iloc *iloc)
186{
187 struct ext4_xattr_entry *entry;
188 struct ext4_xattr_ibody_header *header;
189 int cp_len = 0;
190 struct ext4_inode *raw_inode;
191
192 if (!len)
193 return 0;
194
195 BUG_ON(len > EXT4_I(inode)->i_inline_size);
196
197 cp_len = min_t(unsigned int, len, EXT4_MIN_INLINE_DATA_SIZE);
198
199 raw_inode = ext4_raw_inode(iloc);
200 memcpy(to: buffer, from: (void *)(raw_inode->i_block), len: cp_len);
201
202 len -= cp_len;
203 buffer += cp_len;
204
205 if (!len)
206 goto out;
207
208 header = IHDR(inode, raw_inode);
209 entry = (struct ext4_xattr_entry *)((void *)raw_inode +
210 EXT4_I(inode)->i_inline_off);
211 len = min_t(unsigned int, len,
212 (unsigned int)le32_to_cpu(entry->e_value_size));
213
214 memcpy(to: buffer,
215 from: (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs), len);
216 cp_len += len;
217
218out:
219 return cp_len;
220}
221
222/*
223 * write the buffer to the inline inode.
224 * If 'create' is set, we don't need to do the extra copy in the xattr
225 * value since it is already handled by ext4_xattr_ibody_set.
226 * That saves us one memcpy.
227 */
228static void ext4_write_inline_data(struct inode *inode, struct ext4_iloc *iloc,
229 void *buffer, loff_t pos, unsigned int len)
230{
231 struct ext4_xattr_entry *entry;
232 struct ext4_xattr_ibody_header *header;
233 struct ext4_inode *raw_inode;
234 int cp_len = 0;
235
236 if (unlikely(ext4_emergency_state(inode->i_sb)))
237 return;
238
239 BUG_ON(!EXT4_I(inode)->i_inline_off);
240 BUG_ON(pos + len > EXT4_I(inode)->i_inline_size);
241
242 raw_inode = ext4_raw_inode(iloc);
243 buffer += pos;
244
245 if (pos < EXT4_MIN_INLINE_DATA_SIZE) {
246 cp_len = pos + len > EXT4_MIN_INLINE_DATA_SIZE ?
247 EXT4_MIN_INLINE_DATA_SIZE - pos : len;
248 memcpy(to: (void *)raw_inode->i_block + pos, from: buffer, len: cp_len);
249
250 len -= cp_len;
251 buffer += cp_len;
252 pos += cp_len;
253 }
254
255 if (!len)
256 return;
257
258 pos -= EXT4_MIN_INLINE_DATA_SIZE;
259 header = IHDR(inode, raw_inode);
260 entry = (struct ext4_xattr_entry *)((void *)raw_inode +
261 EXT4_I(inode)->i_inline_off);
262
263 memcpy(to: (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs) + pos,
264 from: buffer, len);
265}
266
267static int ext4_create_inline_data(handle_t *handle,
268 struct inode *inode, unsigned len)
269{
270 int error;
271 void *value = NULL;
272 struct ext4_xattr_ibody_find is = {
273 .s = { .not_found = -ENODATA, },
274 };
275 struct ext4_xattr_info i = {
276 .name_index = EXT4_XATTR_INDEX_SYSTEM,
277 .name = EXT4_XATTR_SYSTEM_DATA,
278 };
279
280 error = ext4_get_inode_loc(inode, &is.iloc);
281 if (error)
282 return error;
283
284 BUFFER_TRACE(is.iloc.bh, "get_write_access");
285 error = ext4_journal_get_write_access(handle, inode->i_sb, is.iloc.bh,
286 EXT4_JTR_NONE);
287 if (error)
288 goto out;
289
290 if (len > EXT4_MIN_INLINE_DATA_SIZE) {
291 value = EXT4_ZERO_XATTR_VALUE;
292 len -= EXT4_MIN_INLINE_DATA_SIZE;
293 } else {
294 value = "";
295 len = 0;
296 }
297
298 /* Insert the xttr entry. */
299 i.value = value;
300 i.value_len = len;
301
302 error = ext4_xattr_ibody_find(inode, i: &i, is: &is);
303 if (error)
304 goto out;
305
306 if (!is.s.not_found) {
307 EXT4_ERROR_INODE(inode, "unexpected inline data xattr");
308 error = -EFSCORRUPTED;
309 goto out;
310 }
311
312 error = ext4_xattr_ibody_set(handle, inode, i: &i, is: &is);
313 if (error) {
314 if (error == -ENOSPC)
315 ext4_clear_inode_state(inode,
316 bit: EXT4_STATE_MAY_INLINE_DATA);
317 goto out;
318 }
319
320 memset(s: (void *)ext4_raw_inode(iloc: &is.iloc)->i_block,
321 c: 0, EXT4_MIN_INLINE_DATA_SIZE);
322
323 EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
324 (void *)ext4_raw_inode(iloc: &is.iloc));
325 EXT4_I(inode)->i_inline_size = len + EXT4_MIN_INLINE_DATA_SIZE;
326 ext4_clear_inode_flag(inode, bit: EXT4_INODE_EXTENTS);
327 ext4_set_inode_flag(inode, bit: EXT4_INODE_INLINE_DATA);
328 get_bh(bh: is.iloc.bh);
329 error = ext4_mark_iloc_dirty(handle, inode, iloc: &is.iloc);
330
331out:
332 brelse(bh: is.iloc.bh);
333 return error;
334}
335
336static int ext4_update_inline_data(handle_t *handle, struct inode *inode,
337 unsigned int len)
338{
339 int error;
340 void *value = NULL;
341 struct ext4_xattr_ibody_find is = {
342 .s = { .not_found = -ENODATA, },
343 };
344 struct ext4_xattr_info i = {
345 .name_index = EXT4_XATTR_INDEX_SYSTEM,
346 .name = EXT4_XATTR_SYSTEM_DATA,
347 };
348
349 /* If the old space is ok, write the data directly. */
350 if (len <= EXT4_I(inode)->i_inline_size)
351 return 0;
352
353 error = ext4_get_inode_loc(inode, &is.iloc);
354 if (error)
355 return error;
356
357 error = ext4_xattr_ibody_find(inode, i: &i, is: &is);
358 if (error)
359 goto out;
360
361 if (is.s.not_found) {
362 EXT4_ERROR_INODE(inode, "missing inline data xattr");
363 error = -EFSCORRUPTED;
364 goto out;
365 }
366
367 len -= EXT4_MIN_INLINE_DATA_SIZE;
368 value = kzalloc(len, GFP_NOFS);
369 if (!value) {
370 error = -ENOMEM;
371 goto out;
372 }
373
374 error = ext4_xattr_ibody_get(inode, name_index: i.name_index, name: i.name,
375 buffer: value, buffer_size: len);
376 if (error < 0)
377 goto out;
378
379 BUFFER_TRACE(is.iloc.bh, "get_write_access");
380 error = ext4_journal_get_write_access(handle, inode->i_sb, is.iloc.bh,
381 EXT4_JTR_NONE);
382 if (error)
383 goto out;
384
385 /* Update the xattr entry. */
386 i.value = value;
387 i.value_len = len;
388
389 error = ext4_xattr_ibody_set(handle, inode, i: &i, is: &is);
390 if (error)
391 goto out;
392
393 EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
394 (void *)ext4_raw_inode(iloc: &is.iloc));
395 EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE +
396 le32_to_cpu(is.s.here->e_value_size);
397 ext4_set_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA);
398 get_bh(bh: is.iloc.bh);
399 error = ext4_mark_iloc_dirty(handle, inode, iloc: &is.iloc);
400
401out:
402 kfree(objp: value);
403 brelse(bh: is.iloc.bh);
404 return error;
405}
406
407static int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
408 loff_t len)
409{
410 int ret, size, no_expand;
411 struct ext4_inode_info *ei = EXT4_I(inode);
412
413 if (!ext4_test_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA))
414 return -ENOSPC;
415
416 size = ext4_get_max_inline_size(inode);
417 if (size < len)
418 return -ENOSPC;
419
420 ext4_write_lock_xattr(inode, save: &no_expand);
421
422 if (ei->i_inline_off)
423 ret = ext4_update_inline_data(handle, inode, len);
424 else
425 ret = ext4_create_inline_data(handle, inode, len);
426
427 ext4_write_unlock_xattr(inode, save: &no_expand);
428 return ret;
429}
430
431static int ext4_destroy_inline_data_nolock(handle_t *handle,
432 struct inode *inode)
433{
434 struct ext4_inode_info *ei = EXT4_I(inode);
435 struct ext4_xattr_ibody_find is = {
436 .s = { .not_found = 0, },
437 };
438 struct ext4_xattr_info i = {
439 .name_index = EXT4_XATTR_INDEX_SYSTEM,
440 .name = EXT4_XATTR_SYSTEM_DATA,
441 .value = NULL,
442 .value_len = 0,
443 };
444 int error;
445
446 if (!ei->i_inline_off)
447 return 0;
448
449 error = ext4_get_inode_loc(inode, &is.iloc);
450 if (error)
451 return error;
452
453 error = ext4_xattr_ibody_find(inode, i: &i, is: &is);
454 if (error)
455 goto out;
456
457 BUFFER_TRACE(is.iloc.bh, "get_write_access");
458 error = ext4_journal_get_write_access(handle, inode->i_sb, is.iloc.bh,
459 EXT4_JTR_NONE);
460 if (error)
461 goto out;
462
463 error = ext4_xattr_ibody_set(handle, inode, i: &i, is: &is);
464 if (error)
465 goto out;
466
467 memset(s: (void *)ext4_raw_inode(iloc: &is.iloc)->i_block,
468 c: 0, EXT4_MIN_INLINE_DATA_SIZE);
469 memset(s: ei->i_data, c: 0, EXT4_MIN_INLINE_DATA_SIZE);
470
471 if (ext4_has_feature_extents(sb: inode->i_sb)) {
472 if (S_ISDIR(inode->i_mode) ||
473 S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) {
474 ext4_set_inode_flag(inode, bit: EXT4_INODE_EXTENTS);
475 ext4_ext_tree_init(handle, inode);
476 }
477 }
478 ext4_clear_inode_flag(inode, bit: EXT4_INODE_INLINE_DATA);
479
480 get_bh(bh: is.iloc.bh);
481 error = ext4_mark_iloc_dirty(handle, inode, iloc: &is.iloc);
482
483 EXT4_I(inode)->i_inline_off = 0;
484 EXT4_I(inode)->i_inline_size = 0;
485 ext4_clear_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA);
486out:
487 brelse(bh: is.iloc.bh);
488 if (error == -ENODATA)
489 error = 0;
490 return error;
491}
492
493static int ext4_read_inline_folio(struct inode *inode, struct folio *folio)
494{
495 void *kaddr;
496 int ret = 0;
497 size_t len;
498 struct ext4_iloc iloc;
499
500 BUG_ON(!folio_test_locked(folio));
501 BUG_ON(!ext4_has_inline_data(inode));
502 BUG_ON(folio->index);
503
504 if (!EXT4_I(inode)->i_inline_off) {
505 ext4_warning(inode->i_sb, "inode %lu doesn't have inline data.",
506 inode->i_ino);
507 goto out;
508 }
509
510 ret = ext4_get_inode_loc(inode, &iloc);
511 if (ret)
512 goto out;
513
514 len = min_t(size_t, ext4_get_inline_size(inode), i_size_read(inode));
515 BUG_ON(len > PAGE_SIZE);
516 kaddr = kmap_local_folio(folio, offset: 0);
517 ret = ext4_read_inline_data(inode, buffer: kaddr, len, iloc: &iloc);
518 kaddr = folio_zero_tail(folio, offset: len, kaddr: kaddr + len);
519 kunmap_local(kaddr);
520 folio_mark_uptodate(folio);
521 brelse(bh: iloc.bh);
522
523out:
524 return ret;
525}
526
527int ext4_readpage_inline(struct inode *inode, struct folio *folio)
528{
529 int ret = 0;
530
531 down_read(sem: &EXT4_I(inode)->xattr_sem);
532 if (!ext4_has_inline_data(inode)) {
533 up_read(sem: &EXT4_I(inode)->xattr_sem);
534 return -EAGAIN;
535 }
536
537 /*
538 * Current inline data can only exist in the 1st page,
539 * So for all the other pages, just set them uptodate.
540 */
541 if (!folio->index)
542 ret = ext4_read_inline_folio(inode, folio);
543 else if (!folio_test_uptodate(folio)) {
544 folio_zero_segment(folio, start: 0, xend: folio_size(folio));
545 folio_mark_uptodate(folio);
546 }
547
548 up_read(sem: &EXT4_I(inode)->xattr_sem);
549
550 folio_unlock(folio);
551 return ret >= 0 ? 0 : ret;
552}
553
554static int ext4_convert_inline_data_to_extent(struct address_space *mapping,
555 struct inode *inode)
556{
557 int ret, needed_blocks, no_expand;
558 handle_t *handle = NULL;
559 int retries = 0, sem_held = 0;
560 struct folio *folio = NULL;
561 unsigned from, to;
562 struct ext4_iloc iloc;
563
564 if (!ext4_has_inline_data(inode)) {
565 /*
566 * clear the flag so that no new write
567 * will trap here again.
568 */
569 ext4_clear_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA);
570 return 0;
571 }
572
573 needed_blocks = ext4_chunk_trans_extent(inode, nrblocks: 1);
574
575 ret = ext4_get_inode_loc(inode, &iloc);
576 if (ret)
577 return ret;
578
579retry:
580 handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, needed_blocks);
581 if (IS_ERR(ptr: handle)) {
582 ret = PTR_ERR(ptr: handle);
583 handle = NULL;
584 goto out;
585 }
586
587 /* We cannot recurse into the filesystem as the transaction is already
588 * started */
589 folio = __filemap_get_folio(mapping, index: 0, FGP_WRITEBEGIN | FGP_NOFS,
590 gfp: mapping_gfp_mask(mapping));
591 if (IS_ERR(ptr: folio)) {
592 ret = PTR_ERR(ptr: folio);
593 goto out_nofolio;
594 }
595
596 ext4_write_lock_xattr(inode, save: &no_expand);
597 sem_held = 1;
598 /* If some one has already done this for us, just exit. */
599 if (!ext4_has_inline_data(inode)) {
600 ret = 0;
601 goto out;
602 }
603
604 from = 0;
605 to = ext4_get_inline_size(inode);
606 if (!folio_test_uptodate(folio)) {
607 ret = ext4_read_inline_folio(inode, folio);
608 if (ret < 0)
609 goto out;
610 }
611
612 ext4_fc_track_inode(handle, inode);
613 ret = ext4_destroy_inline_data_nolock(handle, inode);
614 if (ret)
615 goto out;
616
617 if (ext4_should_dioread_nolock(inode)) {
618 ret = ext4_block_write_begin(handle, folio, pos: from, len: to,
619 get_block: ext4_get_block_unwritten);
620 } else
621 ret = ext4_block_write_begin(handle, folio, pos: from, len: to,
622 get_block: ext4_get_block);
623 clear_buffer_new(folio_buffers(folio));
624
625 if (!ret && ext4_should_journal_data(inode)) {
626 ret = ext4_walk_page_buffers(handle, inode,
627 folio_buffers(folio), from, to,
628 NULL, fn: do_journal_get_write_access);
629 }
630
631 if (ret) {
632 folio_unlock(folio);
633 folio_put(folio);
634 folio = NULL;
635 ext4_orphan_add(handle, inode);
636 ext4_write_unlock_xattr(inode, save: &no_expand);
637 sem_held = 0;
638 ext4_journal_stop(handle);
639 handle = NULL;
640 ext4_truncate_failed_write(inode);
641 /*
642 * If truncate failed early the inode might
643 * still be on the orphan list; we need to
644 * make sure the inode is removed from the
645 * orphan list in that case.
646 */
647 if (inode->i_nlink)
648 ext4_orphan_del(NULL, inode);
649 }
650
651 if (ret == -ENOSPC && ext4_should_retry_alloc(sb: inode->i_sb, retries: &retries))
652 goto retry;
653
654 if (folio)
655 block_commit_write(folio, from, to);
656out:
657 if (folio) {
658 folio_unlock(folio);
659 folio_put(folio);
660 }
661out_nofolio:
662 if (sem_held)
663 ext4_write_unlock_xattr(inode, save: &no_expand);
664 if (handle)
665 ext4_journal_stop(handle);
666 brelse(bh: iloc.bh);
667 return ret;
668}
669
670/*
671 * Prepare the write for the inline data.
672 * If the data can be written into the inode, we just read
673 * the page and make it uptodate, and start the journal.
674 * Otherwise read the page, makes it dirty so that it can be
675 * handle in writepages(the i_disksize update is left to the
676 * normal ext4_da_write_end).
677 */
678int ext4_generic_write_inline_data(struct address_space *mapping,
679 struct inode *inode,
680 loff_t pos, unsigned len,
681 struct folio **foliop,
682 void **fsdata, bool da)
683{
684 int ret;
685 handle_t *handle;
686 struct folio *folio;
687 struct ext4_iloc iloc;
688 int retries = 0;
689
690 ret = ext4_get_inode_loc(inode, &iloc);
691 if (ret)
692 return ret;
693
694retry_journal:
695 handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
696 if (IS_ERR(ptr: handle)) {
697 ret = PTR_ERR(ptr: handle);
698 goto out_release_bh;
699 }
700
701 ret = ext4_prepare_inline_data(handle, inode, len: pos + len);
702 if (ret && ret != -ENOSPC)
703 goto out_stop_journal;
704
705 if (ret == -ENOSPC) {
706 ext4_journal_stop(handle);
707 if (!da) {
708 brelse(bh: iloc.bh);
709 /* Retry inside */
710 return ext4_convert_inline_data_to_extent(mapping, inode);
711 }
712
713 ret = ext4_da_convert_inline_data_to_extent(mapping, inode, fsdata);
714 if (ret == -ENOSPC &&
715 ext4_should_retry_alloc(sb: inode->i_sb, retries: &retries))
716 goto retry_journal;
717 goto out_release_bh;
718 }
719
720 folio = __filemap_get_folio(mapping, index: 0, FGP_WRITEBEGIN | FGP_NOFS,
721 gfp: mapping_gfp_mask(mapping));
722 if (IS_ERR(ptr: folio)) {
723 ret = PTR_ERR(ptr: folio);
724 goto out_stop_journal;
725 }
726
727 down_read(sem: &EXT4_I(inode)->xattr_sem);
728 /* Someone else had converted it to extent */
729 if (!ext4_has_inline_data(inode)) {
730 ret = 0;
731 goto out_release_folio;
732 }
733
734 if (!folio_test_uptodate(folio)) {
735 ret = ext4_read_inline_folio(inode, folio);
736 if (ret < 0)
737 goto out_release_folio;
738 }
739
740 ret = ext4_journal_get_write_access(handle, inode->i_sb, iloc.bh, EXT4_JTR_NONE);
741 if (ret)
742 goto out_release_folio;
743 *foliop = folio;
744 up_read(sem: &EXT4_I(inode)->xattr_sem);
745 brelse(bh: iloc.bh);
746 return 1;
747
748out_release_folio:
749 up_read(sem: &EXT4_I(inode)->xattr_sem);
750 folio_unlock(folio);
751 folio_put(folio);
752out_stop_journal:
753 ext4_journal_stop(handle);
754out_release_bh:
755 brelse(bh: iloc.bh);
756 return ret;
757}
758
759/*
760 * Try to write data in the inode.
761 * If the inode has inline data, check whether the new write can be
762 * in the inode also. If not, create the page the handle, move the data
763 * to the page make it update and let the later codes create extent for it.
764 */
765int ext4_try_to_write_inline_data(struct address_space *mapping,
766 struct inode *inode,
767 loff_t pos, unsigned len,
768 struct folio **foliop)
769{
770 if (pos + len > ext4_get_max_inline_size(inode))
771 return ext4_convert_inline_data_to_extent(mapping, inode);
772 return ext4_generic_write_inline_data(mapping, inode, pos, len,
773 foliop, NULL, da: false);
774}
775
776int ext4_write_inline_data_end(struct inode *inode, loff_t pos, unsigned len,
777 unsigned copied, struct folio *folio)
778{
779 handle_t *handle = ext4_journal_current_handle();
780 int no_expand;
781 void *kaddr;
782 struct ext4_iloc iloc;
783 int ret = 0, ret2;
784
785 if (unlikely(copied < len) && !folio_test_uptodate(folio))
786 copied = 0;
787
788 if (likely(copied)) {
789 ret = ext4_get_inode_loc(inode, &iloc);
790 if (ret) {
791 folio_unlock(folio);
792 folio_put(folio);
793 ext4_std_error(inode->i_sb, ret);
794 goto out;
795 }
796 ext4_write_lock_xattr(inode, save: &no_expand);
797 BUG_ON(!ext4_has_inline_data(inode));
798
799 /*
800 * ei->i_inline_off may have changed since
801 * ext4_write_begin() called
802 * ext4_try_to_write_inline_data()
803 */
804 (void) ext4_find_inline_data_nolock(inode);
805
806 kaddr = kmap_local_folio(folio, offset: 0);
807 ext4_write_inline_data(inode, iloc: &iloc, buffer: kaddr, pos, len: copied);
808 kunmap_local(kaddr);
809 folio_mark_uptodate(folio);
810 /* clear dirty flag so that writepages wouldn't work for us. */
811 folio_clear_dirty(folio);
812
813 ext4_write_unlock_xattr(inode, save: &no_expand);
814 brelse(bh: iloc.bh);
815
816 /*
817 * It's important to update i_size while still holding folio
818 * lock: page writeout could otherwise come in and zero
819 * beyond i_size.
820 */
821 ext4_update_inode_size(inode, newsize: pos + copied);
822 }
823 folio_unlock(folio);
824 folio_put(folio);
825
826 /*
827 * Don't mark the inode dirty under folio lock. First, it unnecessarily
828 * makes the holding time of folio lock longer. Second, it forces lock
829 * ordering of folio lock and transaction start for journaling
830 * filesystems.
831 */
832 if (likely(copied))
833 mark_inode_dirty(inode);
834out:
835 /*
836 * If we didn't copy as much data as expected, we need to trim back
837 * size of xattr containing inline data.
838 */
839 if (pos + len > inode->i_size && ext4_can_truncate(inode))
840 ext4_orphan_add(handle, inode);
841
842 ret2 = ext4_journal_stop(handle);
843 if (!ret)
844 ret = ret2;
845 if (pos + len > inode->i_size) {
846 ext4_truncate_failed_write(inode);
847 /*
848 * If truncate failed early the inode might still be
849 * on the orphan list; we need to make sure the inode
850 * is removed from the orphan list in that case.
851 */
852 if (inode->i_nlink)
853 ext4_orphan_del(NULL, inode);
854 }
855 return ret ? ret : copied;
856}
857
858/*
859 * Try to make the page cache and handle ready for the inline data case.
860 * We can call this function in 2 cases:
861 * 1. The inode is created and the first write exceeds inline size. We can
862 * clear the inode state safely.
863 * 2. The inode has inline data, then we need to read the data, make it
864 * update and dirty so that ext4_da_writepages can handle it. We don't
865 * need to start the journal since the file's metadata isn't changed now.
866 */
867static int ext4_da_convert_inline_data_to_extent(struct address_space *mapping,
868 struct inode *inode,
869 void **fsdata)
870{
871 int ret = 0, inline_size;
872 struct folio *folio;
873
874 folio = __filemap_get_folio(mapping, index: 0, FGP_WRITEBEGIN,
875 gfp: mapping_gfp_mask(mapping));
876 if (IS_ERR(ptr: folio))
877 return PTR_ERR(ptr: folio);
878
879 down_read(sem: &EXT4_I(inode)->xattr_sem);
880 if (!ext4_has_inline_data(inode)) {
881 ext4_clear_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA);
882 goto out;
883 }
884
885 inline_size = ext4_get_inline_size(inode);
886
887 if (!folio_test_uptodate(folio)) {
888 ret = ext4_read_inline_folio(inode, folio);
889 if (ret < 0)
890 goto out;
891 }
892
893 ret = ext4_block_write_begin(NULL, folio, pos: 0, len: inline_size,
894 get_block: ext4_da_get_block_prep);
895 if (ret) {
896 up_read(sem: &EXT4_I(inode)->xattr_sem);
897 folio_unlock(folio);
898 folio_put(folio);
899 ext4_truncate_failed_write(inode);
900 return ret;
901 }
902
903 clear_buffer_new(folio_buffers(folio));
904 folio_mark_dirty(folio);
905 folio_mark_uptodate(folio);
906 ext4_clear_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA);
907 *fsdata = (void *)CONVERT_INLINE_DATA;
908
909out:
910 up_read(sem: &EXT4_I(inode)->xattr_sem);
911 if (folio) {
912 folio_unlock(folio);
913 folio_put(folio);
914 }
915 return ret;
916}
917
918#ifdef INLINE_DIR_DEBUG
919void ext4_show_inline_dir(struct inode *dir, struct buffer_head *bh,
920 void *inline_start, int inline_size)
921{
922 int offset;
923 unsigned short de_len;
924 struct ext4_dir_entry_2 *de = inline_start;
925 void *dlimit = inline_start + inline_size;
926
927 trace_printk("inode %lu\n", dir->i_ino);
928 offset = 0;
929 while ((void *)de < dlimit) {
930 de_len = ext4_rec_len_from_disk(de->rec_len, inline_size);
931 trace_printk("de: off %u rlen %u name %.*s nlen %u ino %u\n",
932 offset, de_len, de->name_len, de->name,
933 de->name_len, le32_to_cpu(de->inode));
934 if (ext4_check_dir_entry(dir, NULL, de, bh,
935 inline_start, inline_size, offset))
936 BUG();
937
938 offset += de_len;
939 de = (struct ext4_dir_entry_2 *) ((char *) de + de_len);
940 }
941}
942#else
943#define ext4_show_inline_dir(dir, bh, inline_start, inline_size)
944#endif
945
946/*
947 * Add a new entry into a inline dir.
948 * It will return -ENOSPC if no space is available, and -EIO
949 * and -EEXIST if directory entry already exists.
950 */
951static int ext4_add_dirent_to_inline(handle_t *handle,
952 struct ext4_filename *fname,
953 struct inode *dir,
954 struct inode *inode,
955 struct ext4_iloc *iloc,
956 void *inline_start, int inline_size)
957{
958 int err;
959 struct ext4_dir_entry_2 *de;
960
961 err = ext4_find_dest_de(dir, bh: iloc->bh, buf: inline_start,
962 buf_size: inline_size, fname, dest_de: &de);
963 if (err)
964 return err;
965
966 BUFFER_TRACE(iloc->bh, "get_write_access");
967 err = ext4_journal_get_write_access(handle, dir->i_sb, iloc->bh,
968 EXT4_JTR_NONE);
969 if (err)
970 return err;
971 ext4_insert_dentry(dir, inode, de, buf_size: inline_size, fname);
972
973 ext4_show_inline_dir(dir, iloc->bh, inline_start, inline_size);
974
975 /*
976 * XXX shouldn't update any times until successful
977 * completion of syscall, but too many callers depend
978 * on this.
979 *
980 * XXX similarly, too many callers depend on
981 * ext4_new_inode() setting the times, but error
982 * recovery deletes the inode, so the worst that can
983 * happen is that the times are slightly out of date
984 * and/or different from the directory change time.
985 */
986 inode_set_mtime_to_ts(inode: dir, ts: inode_set_ctime_current(inode: dir));
987 ext4_update_dx_flag(inode: dir);
988 inode_inc_iversion(inode: dir);
989 return 1;
990}
991
992static void *ext4_get_inline_xattr_pos(struct inode *inode,
993 struct ext4_iloc *iloc)
994{
995 struct ext4_xattr_entry *entry;
996 struct ext4_xattr_ibody_header *header;
997
998 BUG_ON(!EXT4_I(inode)->i_inline_off);
999
1000 header = IHDR(inode, ext4_raw_inode(iloc));
1001 entry = (struct ext4_xattr_entry *)((void *)ext4_raw_inode(iloc) +
1002 EXT4_I(inode)->i_inline_off);
1003
1004 return (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs);
1005}
1006
1007/* Set the final de to cover the whole block. */
1008void ext4_update_final_de(void *de_buf, int old_size, int new_size)
1009{
1010 struct ext4_dir_entry_2 *de, *prev_de;
1011 void *limit;
1012 int de_len;
1013
1014 de = de_buf;
1015 if (old_size) {
1016 limit = de_buf + old_size;
1017 do {
1018 prev_de = de;
1019 de_len = ext4_rec_len_from_disk(dlen: de->rec_len, blocksize: old_size);
1020 de_buf += de_len;
1021 de = de_buf;
1022 } while (de_buf < limit);
1023
1024 prev_de->rec_len = ext4_rec_len_to_disk(len: de_len + new_size -
1025 old_size, blocksize: new_size);
1026 } else {
1027 /* this is just created, so create an empty entry. */
1028 de->inode = 0;
1029 de->rec_len = ext4_rec_len_to_disk(len: new_size, blocksize: new_size);
1030 }
1031}
1032
1033static int ext4_update_inline_dir(handle_t *handle, struct inode *dir,
1034 struct ext4_iloc *iloc)
1035{
1036 int ret;
1037 int old_size = EXT4_I(inode: dir)->i_inline_size - EXT4_MIN_INLINE_DATA_SIZE;
1038 int new_size = get_max_inline_xattr_value_size(inode: dir, iloc);
1039
1040 if (new_size - old_size <= ext4_dir_rec_len(name_len: 1, NULL))
1041 return -ENOSPC;
1042
1043 ret = ext4_update_inline_data(handle, inode: dir,
1044 len: new_size + EXT4_MIN_INLINE_DATA_SIZE);
1045 if (ret)
1046 return ret;
1047
1048 ext4_update_final_de(de_buf: ext4_get_inline_xattr_pos(inode: dir, iloc), old_size,
1049 new_size: EXT4_I(inode: dir)->i_inline_size -
1050 EXT4_MIN_INLINE_DATA_SIZE);
1051 dir->i_size = EXT4_I(inode: dir)->i_disksize = EXT4_I(inode: dir)->i_inline_size;
1052 return 0;
1053}
1054
1055static void ext4_restore_inline_data(handle_t *handle, struct inode *inode,
1056 struct ext4_iloc *iloc,
1057 void *buf, int inline_size)
1058{
1059 int ret;
1060
1061 ret = ext4_create_inline_data(handle, inode, len: inline_size);
1062 if (ret) {
1063 ext4_msg(inode->i_sb, KERN_EMERG,
1064 "error restoring inline_data for inode -- potential data loss! (inode %lu, error %d)",
1065 inode->i_ino, ret);
1066 return;
1067 }
1068 ext4_write_inline_data(inode, iloc, buffer: buf, pos: 0, len: inline_size);
1069 ext4_set_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA);
1070}
1071
1072static int ext4_convert_inline_data_nolock(handle_t *handle,
1073 struct inode *inode,
1074 struct ext4_iloc *iloc)
1075{
1076 int error;
1077 void *buf = NULL;
1078 struct buffer_head *data_bh = NULL;
1079 struct ext4_map_blocks map;
1080 int inline_size;
1081
1082 inline_size = ext4_get_inline_size(inode);
1083 buf = kmalloc(inline_size, GFP_NOFS);
1084 if (!buf) {
1085 error = -ENOMEM;
1086 goto out;
1087 }
1088
1089 error = ext4_read_inline_data(inode, buffer: buf, len: inline_size, iloc);
1090 if (error < 0)
1091 goto out;
1092
1093 /*
1094 * Make sure the inline directory entries pass checks before we try to
1095 * convert them, so that we avoid touching stuff that needs fsck.
1096 */
1097 if (S_ISDIR(inode->i_mode)) {
1098 error = ext4_check_all_de(dir: inode, bh: iloc->bh,
1099 buf: buf + EXT4_INLINE_DOTDOT_SIZE,
1100 buf_size: inline_size - EXT4_INLINE_DOTDOT_SIZE);
1101 if (error)
1102 goto out;
1103 }
1104
1105 error = ext4_destroy_inline_data_nolock(handle, inode);
1106 if (error)
1107 goto out;
1108
1109 map.m_lblk = 0;
1110 map.m_len = 1;
1111 map.m_flags = 0;
1112 error = ext4_map_blocks(handle, inode, map: &map, EXT4_GET_BLOCKS_CREATE);
1113 if (error < 0)
1114 goto out_restore;
1115 if (!(map.m_flags & EXT4_MAP_MAPPED)) {
1116 error = -EIO;
1117 goto out_restore;
1118 }
1119
1120 data_bh = sb_getblk(sb: inode->i_sb, block: map.m_pblk);
1121 if (!data_bh) {
1122 error = -ENOMEM;
1123 goto out_restore;
1124 }
1125
1126 lock_buffer(bh: data_bh);
1127 error = ext4_journal_get_create_access(handle, inode->i_sb, data_bh,
1128 EXT4_JTR_NONE);
1129 if (error) {
1130 unlock_buffer(bh: data_bh);
1131 error = -EIO;
1132 goto out_restore;
1133 }
1134 memset(s: data_bh->b_data, c: 0, n: inode->i_sb->s_blocksize);
1135
1136 if (!S_ISDIR(inode->i_mode)) {
1137 memcpy(to: data_bh->b_data, from: buf, len: inline_size);
1138 set_buffer_uptodate(data_bh);
1139 unlock_buffer(bh: data_bh);
1140 error = ext4_handle_dirty_metadata(handle,
1141 inode, data_bh);
1142 } else {
1143 unlock_buffer(bh: data_bh);
1144 inode->i_size = inode->i_sb->s_blocksize;
1145 i_size_write(inode, i_size: inode->i_sb->s_blocksize);
1146 EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
1147
1148 error = ext4_init_dirblock(handle, inode, dir_block: data_bh,
1149 le32_to_cpu(((struct ext4_dir_entry_2 *)buf)->inode),
1150 inline_buf: buf + EXT4_INLINE_DOTDOT_SIZE,
1151 inline_size: inline_size - EXT4_INLINE_DOTDOT_SIZE);
1152 if (!error)
1153 error = ext4_mark_inode_dirty(handle, inode);
1154 }
1155
1156out_restore:
1157 if (error)
1158 ext4_restore_inline_data(handle, inode, iloc, buf, inline_size);
1159
1160out:
1161 brelse(bh: data_bh);
1162 kfree(objp: buf);
1163 return error;
1164}
1165
1166/*
1167 * Try to add the new entry to the inline data.
1168 * If succeeds, return 0. If not, extended the inline dir and copied data to
1169 * the new created block.
1170 */
1171int ext4_try_add_inline_entry(handle_t *handle, struct ext4_filename *fname,
1172 struct inode *dir, struct inode *inode)
1173{
1174 int ret, ret2, inline_size, no_expand;
1175 void *inline_start;
1176 struct ext4_iloc iloc;
1177
1178 ret = ext4_get_inode_loc(dir, &iloc);
1179 if (ret)
1180 return ret;
1181
1182 ext4_write_lock_xattr(inode: dir, save: &no_expand);
1183 if (!ext4_has_inline_data(inode: dir))
1184 goto out;
1185
1186 inline_start = (void *)ext4_raw_inode(iloc: &iloc)->i_block +
1187 EXT4_INLINE_DOTDOT_SIZE;
1188 inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE;
1189
1190 ret = ext4_add_dirent_to_inline(handle, fname, dir, inode, iloc: &iloc,
1191 inline_start, inline_size);
1192 if (ret != -ENOSPC)
1193 goto out;
1194
1195 /* check whether it can be inserted to inline xattr space. */
1196 inline_size = EXT4_I(inode: dir)->i_inline_size -
1197 EXT4_MIN_INLINE_DATA_SIZE;
1198 if (!inline_size) {
1199 /* Try to use the xattr space.*/
1200 ret = ext4_update_inline_dir(handle, dir, iloc: &iloc);
1201 if (ret && ret != -ENOSPC)
1202 goto out;
1203
1204 inline_size = EXT4_I(inode: dir)->i_inline_size -
1205 EXT4_MIN_INLINE_DATA_SIZE;
1206 }
1207
1208 if (inline_size) {
1209 inline_start = ext4_get_inline_xattr_pos(inode: dir, iloc: &iloc);
1210
1211 ret = ext4_add_dirent_to_inline(handle, fname, dir,
1212 inode, iloc: &iloc, inline_start,
1213 inline_size);
1214
1215 if (ret != -ENOSPC)
1216 goto out;
1217 }
1218
1219 /*
1220 * The inline space is filled up, so create a new block for it.
1221 * As the extent tree will be created, we have to save the inline
1222 * dir first.
1223 */
1224 ret = ext4_convert_inline_data_nolock(handle, inode: dir, iloc: &iloc);
1225
1226out:
1227 ext4_write_unlock_xattr(inode: dir, save: &no_expand);
1228 ret2 = ext4_mark_inode_dirty(handle, dir);
1229 if (unlikely(ret2 && !ret))
1230 ret = ret2;
1231 brelse(bh: iloc.bh);
1232 return ret;
1233}
1234
1235/*
1236 * This function fills a red-black tree with information from an
1237 * inlined dir. It returns the number directory entries loaded
1238 * into the tree. If there is an error it is returned in err.
1239 */
1240int ext4_inlinedir_to_tree(struct file *dir_file,
1241 struct inode *dir, ext4_lblk_t block,
1242 struct dx_hash_info *hinfo,
1243 __u32 start_hash, __u32 start_minor_hash,
1244 int *has_inline_data)
1245{
1246 int err = 0, count = 0;
1247 unsigned int parent_ino;
1248 int pos;
1249 struct ext4_dir_entry_2 *de;
1250 struct inode *inode = file_inode(f: dir_file);
1251 int ret, inline_size = 0;
1252 struct ext4_iloc iloc;
1253 void *dir_buf = NULL;
1254 struct ext4_dir_entry_2 fake;
1255 struct fscrypt_str tmp_str;
1256
1257 ret = ext4_get_inode_loc(inode, &iloc);
1258 if (ret)
1259 return ret;
1260
1261 down_read(sem: &EXT4_I(inode)->xattr_sem);
1262 if (!ext4_has_inline_data(inode)) {
1263 up_read(sem: &EXT4_I(inode)->xattr_sem);
1264 *has_inline_data = 0;
1265 goto out;
1266 }
1267
1268 inline_size = ext4_get_inline_size(inode);
1269 dir_buf = kmalloc(inline_size, GFP_NOFS);
1270 if (!dir_buf) {
1271 ret = -ENOMEM;
1272 up_read(sem: &EXT4_I(inode)->xattr_sem);
1273 goto out;
1274 }
1275
1276 ret = ext4_read_inline_data(inode, buffer: dir_buf, len: inline_size, iloc: &iloc);
1277 up_read(sem: &EXT4_I(inode)->xattr_sem);
1278 if (ret < 0)
1279 goto out;
1280
1281 pos = 0;
1282 parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode);
1283 while (pos < inline_size) {
1284 /*
1285 * As inlined dir doesn't store any information about '.' and
1286 * only the inode number of '..' is stored, we have to handle
1287 * them differently.
1288 */
1289 if (pos == 0) {
1290 fake.inode = cpu_to_le32(inode->i_ino);
1291 fake.name_len = 1;
1292 memcpy(to: fake.name, from: ".", len: 2);
1293 fake.rec_len = ext4_rec_len_to_disk(
1294 len: ext4_dir_rec_len(name_len: fake.name_len, NULL),
1295 blocksize: inline_size);
1296 ext4_set_de_type(sb: inode->i_sb, de: &fake, S_IFDIR);
1297 de = &fake;
1298 pos = EXT4_INLINE_DOTDOT_OFFSET;
1299 } else if (pos == EXT4_INLINE_DOTDOT_OFFSET) {
1300 fake.inode = cpu_to_le32(parent_ino);
1301 fake.name_len = 2;
1302 memcpy(to: fake.name, from: "..", len: 3);
1303 fake.rec_len = ext4_rec_len_to_disk(
1304 len: ext4_dir_rec_len(name_len: fake.name_len, NULL),
1305 blocksize: inline_size);
1306 ext4_set_de_type(sb: inode->i_sb, de: &fake, S_IFDIR);
1307 de = &fake;
1308 pos = EXT4_INLINE_DOTDOT_SIZE;
1309 } else {
1310 de = (struct ext4_dir_entry_2 *)(dir_buf + pos);
1311 pos += ext4_rec_len_from_disk(dlen: de->rec_len, blocksize: inline_size);
1312 if (ext4_check_dir_entry(inode, dir_file, de,
1313 iloc.bh, dir_buf,
1314 inline_size, pos)) {
1315 ret = count;
1316 goto out;
1317 }
1318 }
1319
1320 if (ext4_hash_in_dirent(inode: dir)) {
1321 hinfo->hash = EXT4_DIRENT_HASH(de);
1322 hinfo->minor_hash = EXT4_DIRENT_MINOR_HASH(de);
1323 } else {
1324 err = ext4fs_dirhash(dir, name: de->name, len: de->name_len, hinfo);
1325 if (err) {
1326 ret = err;
1327 goto out;
1328 }
1329 }
1330 if ((hinfo->hash < start_hash) ||
1331 ((hinfo->hash == start_hash) &&
1332 (hinfo->minor_hash < start_minor_hash)))
1333 continue;
1334 if (de->inode == 0)
1335 continue;
1336 tmp_str.name = de->name;
1337 tmp_str.len = de->name_len;
1338 err = ext4_htree_store_dirent(dir_file, hash: hinfo->hash,
1339 minor_hash: hinfo->minor_hash, dirent: de, ent_name: &tmp_str);
1340 if (err) {
1341 ret = err;
1342 goto out;
1343 }
1344 count++;
1345 }
1346 ret = count;
1347out:
1348 kfree(objp: dir_buf);
1349 brelse(bh: iloc.bh);
1350 return ret;
1351}
1352
1353/*
1354 * So this function is called when the volume is mkfsed with
1355 * dir_index disabled. In order to keep f_pos persistent
1356 * after we convert from an inlined dir to a blocked based,
1357 * we just pretend that we are a normal dir and return the
1358 * offset as if '.' and '..' really take place.
1359 *
1360 */
1361int ext4_read_inline_dir(struct file *file,
1362 struct dir_context *ctx,
1363 int *has_inline_data)
1364{
1365 unsigned int offset, parent_ino;
1366 int i;
1367 struct ext4_dir_entry_2 *de;
1368 struct super_block *sb;
1369 struct inode *inode = file_inode(f: file);
1370 int ret, inline_size = 0;
1371 struct ext4_iloc iloc;
1372 void *dir_buf = NULL;
1373 int dotdot_offset, dotdot_size, extra_offset, extra_size;
1374 struct dir_private_info *info = file->private_data;
1375
1376 ret = ext4_get_inode_loc(inode, &iloc);
1377 if (ret)
1378 return ret;
1379
1380 down_read(sem: &EXT4_I(inode)->xattr_sem);
1381 if (!ext4_has_inline_data(inode)) {
1382 up_read(sem: &EXT4_I(inode)->xattr_sem);
1383 *has_inline_data = 0;
1384 goto out;
1385 }
1386
1387 inline_size = ext4_get_inline_size(inode);
1388 dir_buf = kmalloc(inline_size, GFP_NOFS);
1389 if (!dir_buf) {
1390 ret = -ENOMEM;
1391 up_read(sem: &EXT4_I(inode)->xattr_sem);
1392 goto out;
1393 }
1394
1395 ret = ext4_read_inline_data(inode, buffer: dir_buf, len: inline_size, iloc: &iloc);
1396 up_read(sem: &EXT4_I(inode)->xattr_sem);
1397 if (ret < 0)
1398 goto out;
1399
1400 ret = 0;
1401 sb = inode->i_sb;
1402 parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode);
1403 offset = ctx->pos;
1404
1405 /*
1406 * dotdot_offset and dotdot_size is the real offset and
1407 * size for ".." and "." if the dir is block based while
1408 * the real size for them are only EXT4_INLINE_DOTDOT_SIZE.
1409 * So we will use extra_offset and extra_size to indicate them
1410 * during the inline dir iteration.
1411 */
1412 dotdot_offset = ext4_dir_rec_len(name_len: 1, NULL);
1413 dotdot_size = dotdot_offset + ext4_dir_rec_len(name_len: 2, NULL);
1414 extra_offset = dotdot_size - EXT4_INLINE_DOTDOT_SIZE;
1415 extra_size = extra_offset + inline_size;
1416
1417 /*
1418 * If the cookie has changed since the last call to
1419 * readdir(2), then we might be pointing to an invalid
1420 * dirent right now. Scan from the start of the inline
1421 * dir to make sure.
1422 */
1423 if (!inode_eq_iversion(inode, old: info->cookie)) {
1424 for (i = 0; i < extra_size && i < offset;) {
1425 /*
1426 * "." is with offset 0 and
1427 * ".." is dotdot_offset.
1428 */
1429 if (!i) {
1430 i = dotdot_offset;
1431 continue;
1432 } else if (i == dotdot_offset) {
1433 i = dotdot_size;
1434 continue;
1435 }
1436 /* for other entry, the real offset in
1437 * the buf has to be tuned accordingly.
1438 */
1439 de = (struct ext4_dir_entry_2 *)
1440 (dir_buf + i - extra_offset);
1441 /* It's too expensive to do a full
1442 * dirent test each time round this
1443 * loop, but we do have to test at
1444 * least that it is non-zero. A
1445 * failure will be detected in the
1446 * dirent test below. */
1447 if (ext4_rec_len_from_disk(dlen: de->rec_len, blocksize: extra_size)
1448 < ext4_dir_rec_len(name_len: 1, NULL))
1449 break;
1450 i += ext4_rec_len_from_disk(dlen: de->rec_len,
1451 blocksize: extra_size);
1452 }
1453 offset = i;
1454 ctx->pos = offset;
1455 info->cookie = inode_query_iversion(inode);
1456 }
1457
1458 while (ctx->pos < extra_size) {
1459 if (ctx->pos == 0) {
1460 if (!dir_emit(ctx, name: ".", namelen: 1, ino: inode->i_ino, DT_DIR))
1461 goto out;
1462 ctx->pos = dotdot_offset;
1463 continue;
1464 }
1465
1466 if (ctx->pos == dotdot_offset) {
1467 if (!dir_emit(ctx, name: "..", namelen: 2, ino: parent_ino, DT_DIR))
1468 goto out;
1469 ctx->pos = dotdot_size;
1470 continue;
1471 }
1472
1473 de = (struct ext4_dir_entry_2 *)
1474 (dir_buf + ctx->pos - extra_offset);
1475 if (ext4_check_dir_entry(inode, file, de, iloc.bh, dir_buf,
1476 extra_size, ctx->pos))
1477 goto out;
1478 if (le32_to_cpu(de->inode)) {
1479 if (!dir_emit(ctx, name: de->name, namelen: de->name_len,
1480 le32_to_cpu(de->inode),
1481 type: get_dtype(sb, filetype: de->file_type)))
1482 goto out;
1483 }
1484 ctx->pos += ext4_rec_len_from_disk(dlen: de->rec_len, blocksize: extra_size);
1485 }
1486out:
1487 kfree(objp: dir_buf);
1488 brelse(bh: iloc.bh);
1489 return ret;
1490}
1491
1492void *ext4_read_inline_link(struct inode *inode)
1493{
1494 struct ext4_iloc iloc;
1495 int ret, inline_size;
1496 void *link;
1497
1498 ret = ext4_get_inode_loc(inode, &iloc);
1499 if (ret)
1500 return ERR_PTR(error: ret);
1501
1502 ret = -ENOMEM;
1503 inline_size = ext4_get_inline_size(inode);
1504 link = kmalloc(inline_size + 1, GFP_NOFS);
1505 if (!link)
1506 goto out;
1507
1508 ret = ext4_read_inline_data(inode, buffer: link, len: inline_size, iloc: &iloc);
1509 if (ret < 0) {
1510 kfree(objp: link);
1511 goto out;
1512 }
1513 nd_terminate_link(name: link, len: inode->i_size, maxlen: ret);
1514out:
1515 if (ret < 0)
1516 link = ERR_PTR(error: ret);
1517 brelse(bh: iloc.bh);
1518 return link;
1519}
1520
1521struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
1522 struct ext4_dir_entry_2 **parent_de,
1523 int *retval)
1524{
1525 struct ext4_iloc iloc;
1526
1527 *retval = ext4_get_inode_loc(inode, &iloc);
1528 if (*retval)
1529 return NULL;
1530
1531 *parent_de = (struct ext4_dir_entry_2 *)ext4_raw_inode(iloc: &iloc)->i_block;
1532
1533 return iloc.bh;
1534}
1535
1536/*
1537 * Try to create the inline data for the new dir.
1538 * If it succeeds, return 0, otherwise return the error.
1539 * In case of ENOSPC, the caller should create the normal disk layout dir.
1540 */
1541int ext4_try_create_inline_dir(handle_t *handle, struct inode *parent,
1542 struct inode *inode)
1543{
1544 int ret, inline_size = EXT4_MIN_INLINE_DATA_SIZE;
1545 struct ext4_iloc iloc;
1546 struct ext4_dir_entry_2 *de;
1547
1548 ret = ext4_get_inode_loc(inode, &iloc);
1549 if (ret)
1550 return ret;
1551
1552 ret = ext4_prepare_inline_data(handle, inode, len: inline_size);
1553 if (ret)
1554 goto out;
1555
1556 /*
1557 * For inline dir, we only save the inode information for the ".."
1558 * and create a fake dentry to cover the left space.
1559 */
1560 de = (struct ext4_dir_entry_2 *)ext4_raw_inode(iloc: &iloc)->i_block;
1561 de->inode = cpu_to_le32(parent->i_ino);
1562 de = (struct ext4_dir_entry_2 *)((void *)de + EXT4_INLINE_DOTDOT_SIZE);
1563 de->inode = 0;
1564 de->rec_len = ext4_rec_len_to_disk(
1565 len: inline_size - EXT4_INLINE_DOTDOT_SIZE,
1566 blocksize: inline_size);
1567 set_nlink(inode, nlink: 2);
1568 inode->i_size = EXT4_I(inode)->i_disksize = inline_size;
1569out:
1570 brelse(bh: iloc.bh);
1571 return ret;
1572}
1573
1574struct buffer_head *ext4_find_inline_entry(struct inode *dir,
1575 struct ext4_filename *fname,
1576 struct ext4_dir_entry_2 **res_dir,
1577 int *has_inline_data)
1578{
1579 struct ext4_xattr_ibody_find is = {
1580 .s = { .not_found = -ENODATA, },
1581 };
1582 struct ext4_xattr_info i = {
1583 .name_index = EXT4_XATTR_INDEX_SYSTEM,
1584 .name = EXT4_XATTR_SYSTEM_DATA,
1585 };
1586 int ret;
1587 void *inline_start;
1588 int inline_size;
1589
1590 ret = ext4_get_inode_loc(dir, &is.iloc);
1591 if (ret)
1592 return ERR_PTR(error: ret);
1593
1594 down_read(sem: &EXT4_I(inode: dir)->xattr_sem);
1595
1596 ret = ext4_xattr_ibody_find(inode: dir, i: &i, is: &is);
1597 if (ret)
1598 goto out;
1599
1600 if (!ext4_has_inline_data(inode: dir)) {
1601 *has_inline_data = 0;
1602 goto out;
1603 }
1604
1605 inline_start = (void *)ext4_raw_inode(iloc: &is.iloc)->i_block +
1606 EXT4_INLINE_DOTDOT_SIZE;
1607 inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE;
1608 ret = ext4_search_dir(bh: is.iloc.bh, search_buf: inline_start, buf_size: inline_size,
1609 dir, fname, offset: 0, res_dir);
1610 if (ret == 1)
1611 goto out_find;
1612 if (ret < 0)
1613 goto out;
1614
1615 if (ext4_get_inline_size(inode: dir) == EXT4_MIN_INLINE_DATA_SIZE)
1616 goto out;
1617
1618 inline_start = ext4_get_inline_xattr_pos(inode: dir, iloc: &is.iloc);
1619 inline_size = ext4_get_inline_size(inode: dir) - EXT4_MIN_INLINE_DATA_SIZE;
1620
1621 ret = ext4_search_dir(bh: is.iloc.bh, search_buf: inline_start, buf_size: inline_size,
1622 dir, fname, offset: 0, res_dir);
1623 if (ret == 1)
1624 goto out_find;
1625
1626out:
1627 brelse(bh: is.iloc.bh);
1628 if (ret < 0)
1629 is.iloc.bh = ERR_PTR(error: ret);
1630 else
1631 is.iloc.bh = NULL;
1632out_find:
1633 up_read(sem: &EXT4_I(inode: dir)->xattr_sem);
1634 return is.iloc.bh;
1635}
1636
1637int ext4_delete_inline_entry(handle_t *handle,
1638 struct inode *dir,
1639 struct ext4_dir_entry_2 *de_del,
1640 struct buffer_head *bh,
1641 int *has_inline_data)
1642{
1643 int err, inline_size, no_expand;
1644 struct ext4_iloc iloc;
1645 void *inline_start;
1646
1647 err = ext4_get_inode_loc(dir, &iloc);
1648 if (err)
1649 return err;
1650
1651 ext4_write_lock_xattr(inode: dir, save: &no_expand);
1652 if (!ext4_has_inline_data(inode: dir)) {
1653 *has_inline_data = 0;
1654 goto out;
1655 }
1656
1657 if ((void *)de_del - ((void *)ext4_raw_inode(iloc: &iloc)->i_block) <
1658 EXT4_MIN_INLINE_DATA_SIZE) {
1659 inline_start = (void *)ext4_raw_inode(iloc: &iloc)->i_block +
1660 EXT4_INLINE_DOTDOT_SIZE;
1661 inline_size = EXT4_MIN_INLINE_DATA_SIZE -
1662 EXT4_INLINE_DOTDOT_SIZE;
1663 } else {
1664 inline_start = ext4_get_inline_xattr_pos(inode: dir, iloc: &iloc);
1665 inline_size = ext4_get_inline_size(inode: dir) -
1666 EXT4_MIN_INLINE_DATA_SIZE;
1667 }
1668
1669 BUFFER_TRACE(bh, "get_write_access");
1670 err = ext4_journal_get_write_access(handle, dir->i_sb, bh,
1671 EXT4_JTR_NONE);
1672 if (err)
1673 goto out;
1674
1675 err = ext4_generic_delete_entry(dir, de_del, bh,
1676 entry_buf: inline_start, buf_size: inline_size, csum_size: 0);
1677 if (err)
1678 goto out;
1679
1680 ext4_show_inline_dir(dir, iloc.bh, inline_start, inline_size);
1681out:
1682 ext4_write_unlock_xattr(inode: dir, save: &no_expand);
1683 if (likely(err == 0))
1684 err = ext4_mark_inode_dirty(handle, dir);
1685 brelse(bh: iloc.bh);
1686 if (err != -ENOENT)
1687 ext4_std_error(dir->i_sb, err);
1688 return err;
1689}
1690
1691/*
1692 * Get the inline dentry at offset.
1693 */
1694static inline struct ext4_dir_entry_2 *
1695ext4_get_inline_entry(struct inode *inode,
1696 struct ext4_iloc *iloc,
1697 unsigned int offset,
1698 void **inline_start,
1699 int *inline_size)
1700{
1701 void *inline_pos;
1702
1703 BUG_ON(offset > ext4_get_inline_size(inode));
1704
1705 if (offset < EXT4_MIN_INLINE_DATA_SIZE) {
1706 inline_pos = (void *)ext4_raw_inode(iloc)->i_block;
1707 *inline_size = EXT4_MIN_INLINE_DATA_SIZE;
1708 } else {
1709 inline_pos = ext4_get_inline_xattr_pos(inode, iloc);
1710 offset -= EXT4_MIN_INLINE_DATA_SIZE;
1711 *inline_size = ext4_get_inline_size(inode) -
1712 EXT4_MIN_INLINE_DATA_SIZE;
1713 }
1714
1715 if (inline_start)
1716 *inline_start = inline_pos;
1717 return (struct ext4_dir_entry_2 *)(inline_pos + offset);
1718}
1719
1720bool empty_inline_dir(struct inode *dir, int *has_inline_data)
1721{
1722 int err, inline_size;
1723 struct ext4_iloc iloc;
1724 size_t inline_len;
1725 void *inline_pos;
1726 unsigned int offset;
1727 struct ext4_dir_entry_2 *de;
1728 bool ret = false;
1729
1730 err = ext4_get_inode_loc(dir, &iloc);
1731 if (err) {
1732 EXT4_ERROR_INODE_ERR(dir, -err,
1733 "error %d getting inode %lu block",
1734 err, dir->i_ino);
1735 return false;
1736 }
1737
1738 down_read(sem: &EXT4_I(inode: dir)->xattr_sem);
1739 if (!ext4_has_inline_data(inode: dir)) {
1740 *has_inline_data = 0;
1741 ret = true;
1742 goto out;
1743 }
1744
1745 de = (struct ext4_dir_entry_2 *)ext4_raw_inode(iloc: &iloc)->i_block;
1746 if (!le32_to_cpu(de->inode)) {
1747 ext4_warning(dir->i_sb,
1748 "bad inline directory (dir #%lu) - no `..'",
1749 dir->i_ino);
1750 goto out;
1751 }
1752
1753 inline_len = ext4_get_inline_size(inode: dir);
1754 offset = EXT4_INLINE_DOTDOT_SIZE;
1755 while (offset < inline_len) {
1756 de = ext4_get_inline_entry(inode: dir, iloc: &iloc, offset,
1757 inline_start: &inline_pos, inline_size: &inline_size);
1758 if (ext4_check_dir_entry(dir, NULL, de,
1759 iloc.bh, inline_pos,
1760 inline_size, offset)) {
1761 ext4_warning(dir->i_sb,
1762 "bad inline directory (dir #%lu) - "
1763 "inode %u, rec_len %u, name_len %d"
1764 "inline size %d",
1765 dir->i_ino, le32_to_cpu(de->inode),
1766 le16_to_cpu(de->rec_len), de->name_len,
1767 inline_size);
1768 goto out;
1769 }
1770 if (le32_to_cpu(de->inode)) {
1771 goto out;
1772 }
1773 offset += ext4_rec_len_from_disk(dlen: de->rec_len, blocksize: inline_size);
1774 }
1775
1776 ret = true;
1777out:
1778 up_read(sem: &EXT4_I(inode: dir)->xattr_sem);
1779 brelse(bh: iloc.bh);
1780 return ret;
1781}
1782
1783int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
1784{
1785 int ret, no_expand;
1786
1787 ext4_write_lock_xattr(inode, save: &no_expand);
1788 ret = ext4_destroy_inline_data_nolock(handle, inode);
1789 ext4_write_unlock_xattr(inode, save: &no_expand);
1790
1791 return ret;
1792}
1793
1794int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap)
1795{
1796 __u64 addr;
1797 int error = -EAGAIN;
1798 struct ext4_iloc iloc;
1799
1800 down_read(sem: &EXT4_I(inode)->xattr_sem);
1801 if (!ext4_has_inline_data(inode))
1802 goto out;
1803
1804 error = ext4_get_inode_loc(inode, &iloc);
1805 if (error)
1806 goto out;
1807
1808 addr = (__u64)iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits;
1809 addr += (char *)ext4_raw_inode(iloc: &iloc) - iloc.bh->b_data;
1810 addr += offsetof(struct ext4_inode, i_block);
1811
1812 brelse(bh: iloc.bh);
1813
1814 iomap->addr = addr;
1815 iomap->offset = 0;
1816 iomap->length = min_t(loff_t, ext4_get_inline_size(inode),
1817 i_size_read(inode));
1818 iomap->type = IOMAP_INLINE;
1819 iomap->flags = 0;
1820
1821out:
1822 up_read(sem: &EXT4_I(inode)->xattr_sem);
1823 return error;
1824}
1825
1826int ext4_inline_data_truncate(struct inode *inode, int *has_inline)
1827{
1828 handle_t *handle;
1829 int inline_size, value_len, needed_blocks, no_expand, err = 0;
1830 size_t i_size;
1831 void *value = NULL;
1832 struct ext4_xattr_ibody_find is = {
1833 .s = { .not_found = -ENODATA, },
1834 };
1835 struct ext4_xattr_info i = {
1836 .name_index = EXT4_XATTR_INDEX_SYSTEM,
1837 .name = EXT4_XATTR_SYSTEM_DATA,
1838 };
1839
1840
1841 needed_blocks = ext4_chunk_trans_extent(inode, nrblocks: 1);
1842 handle = ext4_journal_start(inode, EXT4_HT_INODE, needed_blocks);
1843 if (IS_ERR(ptr: handle))
1844 return PTR_ERR(ptr: handle);
1845
1846 ext4_write_lock_xattr(inode, save: &no_expand);
1847 if (!ext4_has_inline_data(inode)) {
1848 ext4_write_unlock_xattr(inode, save: &no_expand);
1849 *has_inline = 0;
1850 ext4_journal_stop(handle);
1851 return 0;
1852 }
1853
1854 if ((err = ext4_orphan_add(handle, inode)) != 0)
1855 goto out;
1856
1857 if ((err = ext4_get_inode_loc(inode, &is.iloc)) != 0)
1858 goto out;
1859
1860 down_write(sem: &EXT4_I(inode)->i_data_sem);
1861 i_size = inode->i_size;
1862 inline_size = ext4_get_inline_size(inode);
1863 EXT4_I(inode)->i_disksize = i_size;
1864
1865 if (i_size < inline_size) {
1866 /*
1867 * if there's inline data to truncate and this file was
1868 * converted to extents after that inline data was written,
1869 * the extent status cache must be cleared to avoid leaving
1870 * behind stale delayed allocated extent entries
1871 */
1872 if (!ext4_test_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA))
1873 ext4_es_remove_extent(inode, lblk: 0, EXT_MAX_BLOCKS);
1874
1875 /* Clear the content in the xattr space. */
1876 if (inline_size > EXT4_MIN_INLINE_DATA_SIZE) {
1877 if ((err = ext4_xattr_ibody_find(inode, i: &i, is: &is)) != 0)
1878 goto out_error;
1879
1880 if (is.s.not_found) {
1881 EXT4_ERROR_INODE(inode,
1882 "missing inline data xattr");
1883 err = -EFSCORRUPTED;
1884 goto out_error;
1885 }
1886
1887 value_len = le32_to_cpu(is.s.here->e_value_size);
1888 value = kmalloc(value_len, GFP_NOFS);
1889 if (!value) {
1890 err = -ENOMEM;
1891 goto out_error;
1892 }
1893
1894 err = ext4_xattr_ibody_get(inode, name_index: i.name_index,
1895 name: i.name, buffer: value, buffer_size: value_len);
1896 if (err <= 0)
1897 goto out_error;
1898
1899 i.value = value;
1900 i.value_len = i_size > EXT4_MIN_INLINE_DATA_SIZE ?
1901 i_size - EXT4_MIN_INLINE_DATA_SIZE : 0;
1902 err = ext4_xattr_ibody_set(handle, inode, i: &i, is: &is);
1903 if (err)
1904 goto out_error;
1905 }
1906
1907 /* Clear the content within i_blocks. */
1908 if (i_size < EXT4_MIN_INLINE_DATA_SIZE) {
1909 void *p = (void *) ext4_raw_inode(iloc: &is.iloc)->i_block;
1910 memset(s: p + i_size, c: 0,
1911 EXT4_MIN_INLINE_DATA_SIZE - i_size);
1912 }
1913
1914 EXT4_I(inode)->i_inline_size = i_size <
1915 EXT4_MIN_INLINE_DATA_SIZE ?
1916 EXT4_MIN_INLINE_DATA_SIZE : i_size;
1917 }
1918
1919out_error:
1920 up_write(sem: &EXT4_I(inode)->i_data_sem);
1921out:
1922 brelse(bh: is.iloc.bh);
1923 ext4_write_unlock_xattr(inode, save: &no_expand);
1924 kfree(objp: value);
1925 if (inode->i_nlink)
1926 ext4_orphan_del(handle, inode);
1927
1928 if (err == 0) {
1929 inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode));
1930 err = ext4_mark_inode_dirty(handle, inode);
1931 if (IS_SYNC(inode))
1932 ext4_handle_sync(handle);
1933 }
1934 ext4_journal_stop(handle);
1935 return err;
1936}
1937
1938int ext4_convert_inline_data(struct inode *inode)
1939{
1940 int error, needed_blocks, no_expand;
1941 handle_t *handle;
1942 struct ext4_iloc iloc;
1943
1944 if (!ext4_has_inline_data(inode)) {
1945 ext4_clear_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA);
1946 return 0;
1947 } else if (!ext4_test_inode_state(inode, bit: EXT4_STATE_MAY_INLINE_DATA)) {
1948 /*
1949 * Inode has inline data but EXT4_STATE_MAY_INLINE_DATA is
1950 * cleared. This means we are in the middle of moving of
1951 * inline data to delay allocated block. Just force writeout
1952 * here to finish conversion.
1953 */
1954 error = filemap_flush(inode->i_mapping);
1955 if (error)
1956 return error;
1957 if (!ext4_has_inline_data(inode))
1958 return 0;
1959 }
1960
1961 needed_blocks = ext4_chunk_trans_extent(inode, nrblocks: 1);
1962
1963 iloc.bh = NULL;
1964 error = ext4_get_inode_loc(inode, &iloc);
1965 if (error)
1966 return error;
1967
1968 handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, needed_blocks);
1969 if (IS_ERR(ptr: handle)) {
1970 error = PTR_ERR(ptr: handle);
1971 goto out_free;
1972 }
1973
1974 ext4_write_lock_xattr(inode, save: &no_expand);
1975 if (ext4_has_inline_data(inode))
1976 error = ext4_convert_inline_data_nolock(handle, inode, iloc: &iloc);
1977 ext4_write_unlock_xattr(inode, save: &no_expand);
1978 ext4_journal_stop(handle);
1979out_free:
1980 brelse(bh: iloc.bh);
1981 return error;
1982}
1983