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22#include <linux/time.h>
23#include <linux/fs.h>
24#include <linux/iomap.h>
25#include <linux/mount.h>
26#include <linux/path.h>
27#include <linux/dax.h>
28#include <linux/quotaops.h>
29#include <linux/pagevec.h>
30#include <linux/uio.h>
31#include <linux/mman.h>
32#include <linux/backing-dev.h>
33#include "ext4.h"
34#include "ext4_jbd2.h"
35#include "xattr.h"
36#include "acl.h"
37#include "truncate.h"
38
39static bool ext4_dio_supported(struct inode *inode)
40{
41 if (IS_ENABLED(CONFIG_FS_ENCRYPTION) && IS_ENCRYPTED(inode))
42 return false;
43 if (fsverity_active(inode))
44 return false;
45 if (ext4_should_journal_data(inode))
46 return false;
47 if (ext4_has_inline_data(inode))
48 return false;
49 return true;
50}
51
52static ssize_t ext4_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
53{
54 ssize_t ret;
55 struct inode *inode = file_inode(iocb->ki_filp);
56
57 if (iocb->ki_flags & IOCB_NOWAIT) {
58 if (!inode_trylock_shared(inode))
59 return -EAGAIN;
60 } else {
61 inode_lock_shared(inode);
62 }
63
64 if (!ext4_dio_supported(inode)) {
65 inode_unlock_shared(inode);
66
67
68
69
70
71
72
73 iocb->ki_flags &= ~IOCB_DIRECT;
74 return generic_file_read_iter(iocb, to);
75 }
76
77 ret = iomap_dio_rw(iocb, to, &ext4_iomap_ops, NULL, 0);
78 inode_unlock_shared(inode);
79
80 file_accessed(iocb->ki_filp);
81 return ret;
82}
83
84#ifdef CONFIG_FS_DAX
85static ssize_t ext4_dax_read_iter(struct kiocb *iocb, struct iov_iter *to)
86{
87 struct inode *inode = file_inode(iocb->ki_filp);
88 ssize_t ret;
89
90 if (iocb->ki_flags & IOCB_NOWAIT) {
91 if (!inode_trylock_shared(inode))
92 return -EAGAIN;
93 } else {
94 inode_lock_shared(inode);
95 }
96
97
98
99
100 if (!IS_DAX(inode)) {
101 inode_unlock_shared(inode);
102
103 return generic_file_read_iter(iocb, to);
104 }
105 ret = dax_iomap_rw(iocb, to, &ext4_iomap_ops);
106 inode_unlock_shared(inode);
107
108 file_accessed(iocb->ki_filp);
109 return ret;
110}
111#endif
112
113static ssize_t ext4_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
114{
115 struct inode *inode = file_inode(iocb->ki_filp);
116
117 if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
118 return -EIO;
119
120 if (!iov_iter_count(to))
121 return 0;
122
123#ifdef CONFIG_FS_DAX
124 if (IS_DAX(inode))
125 return ext4_dax_read_iter(iocb, to);
126#endif
127 if (iocb->ki_flags & IOCB_DIRECT)
128 return ext4_dio_read_iter(iocb, to);
129
130 return generic_file_read_iter(iocb, to);
131}
132
133
134
135
136
137
138static int ext4_release_file(struct inode *inode, struct file *filp)
139{
140 if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE)) {
141 ext4_alloc_da_blocks(inode);
142 ext4_clear_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE);
143 }
144
145 if ((filp->f_mode & FMODE_WRITE) &&
146 (atomic_read(&inode->i_writecount) == 1) &&
147 !EXT4_I(inode)->i_reserved_data_blocks) {
148 down_write(&EXT4_I(inode)->i_data_sem);
149 ext4_discard_preallocations(inode, 0);
150 up_write(&EXT4_I(inode)->i_data_sem);
151 }
152 if (is_dx(inode) && filp->private_data)
153 ext4_htree_free_dir_info(filp->private_data);
154
155 return 0;
156}
157
158
159
160
161
162
163
164
165
166
167static bool
168ext4_unaligned_io(struct inode *inode, struct iov_iter *from, loff_t pos)
169{
170 struct super_block *sb = inode->i_sb;
171 unsigned long blockmask = sb->s_blocksize - 1;
172
173 if ((pos | iov_iter_alignment(from)) & blockmask)
174 return true;
175
176 return false;
177}
178
179static bool
180ext4_extending_io(struct inode *inode, loff_t offset, size_t len)
181{
182 if (offset + len > i_size_read(inode) ||
183 offset + len > EXT4_I(inode)->i_disksize)
184 return true;
185 return false;
186}
187
188
189static bool ext4_overwrite_io(struct inode *inode, loff_t pos, loff_t len)
190{
191 struct ext4_map_blocks map;
192 unsigned int blkbits = inode->i_blkbits;
193 int err, blklen;
194
195 if (pos + len > i_size_read(inode))
196 return false;
197
198 map.m_lblk = pos >> blkbits;
199 map.m_len = EXT4_MAX_BLOCKS(len, pos, blkbits);
200 blklen = map.m_len;
201
202 err = ext4_map_blocks(NULL, inode, &map, 0);
203
204
205
206
207
208 return err == blklen && (map.m_flags & EXT4_MAP_MAPPED);
209}
210
211static ssize_t ext4_generic_write_checks(struct kiocb *iocb,
212 struct iov_iter *from)
213{
214 struct inode *inode = file_inode(iocb->ki_filp);
215 ssize_t ret;
216
217 if (unlikely(IS_IMMUTABLE(inode)))
218 return -EPERM;
219
220 ret = generic_write_checks(iocb, from);
221 if (ret <= 0)
222 return ret;
223
224
225
226
227
228 if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
229 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
230
231 if (iocb->ki_pos >= sbi->s_bitmap_maxbytes)
232 return -EFBIG;
233 iov_iter_truncate(from, sbi->s_bitmap_maxbytes - iocb->ki_pos);
234 }
235
236 return iov_iter_count(from);
237}
238
239static ssize_t ext4_write_checks(struct kiocb *iocb, struct iov_iter *from)
240{
241 ssize_t ret, count;
242
243 count = ext4_generic_write_checks(iocb, from);
244 if (count <= 0)
245 return count;
246
247 ret = file_modified(iocb->ki_filp);
248 if (ret)
249 return ret;
250 return count;
251}
252
253static ssize_t ext4_buffered_write_iter(struct kiocb *iocb,
254 struct iov_iter *from)
255{
256 ssize_t ret;
257 struct inode *inode = file_inode(iocb->ki_filp);
258
259 if (iocb->ki_flags & IOCB_NOWAIT)
260 return -EOPNOTSUPP;
261
262 ext4_fc_start_update(inode);
263 inode_lock(inode);
264 ret = ext4_write_checks(iocb, from);
265 if (ret <= 0)
266 goto out;
267
268 current->backing_dev_info = inode_to_bdi(inode);
269 ret = generic_perform_write(iocb->ki_filp, from, iocb->ki_pos);
270 current->backing_dev_info = NULL;
271
272out:
273 inode_unlock(inode);
274 ext4_fc_stop_update(inode);
275 if (likely(ret > 0)) {
276 iocb->ki_pos += ret;
277 ret = generic_write_sync(iocb, ret);
278 }
279
280 return ret;
281}
282
283static ssize_t ext4_handle_inode_extension(struct inode *inode, loff_t offset,
284 ssize_t written, size_t count)
285{
286 handle_t *handle;
287 bool truncate = false;
288 u8 blkbits = inode->i_blkbits;
289 ext4_lblk_t written_blk, end_blk;
290 int ret;
291
292
293
294
295
296
297
298
299
300 WARN_ON_ONCE(i_size_read(inode) < EXT4_I(inode)->i_disksize);
301 if (offset + count <= EXT4_I(inode)->i_disksize) {
302
303
304
305
306
307 if (!list_empty(&EXT4_I(inode)->i_orphan) && inode->i_nlink) {
308 handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
309
310 if (IS_ERR(handle)) {
311 ext4_orphan_del(NULL, inode);
312 return PTR_ERR(handle);
313 }
314
315 ext4_orphan_del(handle, inode);
316 ext4_journal_stop(handle);
317 }
318
319 return written;
320 }
321
322 if (written < 0)
323 goto truncate;
324
325 handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
326 if (IS_ERR(handle)) {
327 written = PTR_ERR(handle);
328 goto truncate;
329 }
330
331 if (ext4_update_inode_size(inode, offset + written)) {
332 ret = ext4_mark_inode_dirty(handle, inode);
333 if (unlikely(ret)) {
334 written = ret;
335 ext4_journal_stop(handle);
336 goto truncate;
337 }
338 }
339
340
341
342
343 written_blk = ALIGN(offset + written, 1 << blkbits);
344 end_blk = ALIGN(offset + count, 1 << blkbits);
345 if (written_blk < end_blk && ext4_can_truncate(inode))
346 truncate = true;
347
348
349
350
351
352 if (!truncate && inode->i_nlink)
353 ext4_orphan_del(handle, inode);
354 ext4_journal_stop(handle);
355
356 if (truncate) {
357truncate:
358 ext4_truncate_failed_write(inode);
359
360
361
362
363
364 if (inode->i_nlink)
365 ext4_orphan_del(NULL, inode);
366 }
367
368 return written;
369}
370
371static int ext4_dio_write_end_io(struct kiocb *iocb, ssize_t size,
372 int error, unsigned int flags)
373{
374 loff_t pos = iocb->ki_pos;
375 struct inode *inode = file_inode(iocb->ki_filp);
376
377 if (error)
378 return error;
379
380 if (size && flags & IOMAP_DIO_UNWRITTEN) {
381 error = ext4_convert_unwritten_extents(NULL, inode, pos, size);
382 if (error < 0)
383 return error;
384 }
385
386
387
388
389
390
391
392
393
394
395
396
397 pos += size;
398 if (pos > i_size_read(inode))
399 i_size_write(inode, pos);
400
401 return 0;
402}
403
404static const struct iomap_dio_ops ext4_dio_write_ops = {
405 .end_io = ext4_dio_write_end_io,
406};
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422static ssize_t ext4_dio_write_checks(struct kiocb *iocb, struct iov_iter *from,
423 bool *ilock_shared, bool *extend)
424{
425 struct file *file = iocb->ki_filp;
426 struct inode *inode = file_inode(file);
427 loff_t offset;
428 size_t count;
429 ssize_t ret;
430
431restart:
432 ret = ext4_generic_write_checks(iocb, from);
433 if (ret <= 0)
434 goto out;
435
436 offset = iocb->ki_pos;
437 count = ret;
438 if (ext4_extending_io(inode, offset, count))
439 *extend = true;
440
441
442
443
444
445
446 if (*ilock_shared && (!IS_NOSEC(inode) || *extend ||
447 !ext4_overwrite_io(inode, offset, count))) {
448 if (iocb->ki_flags & IOCB_NOWAIT) {
449 ret = -EAGAIN;
450 goto out;
451 }
452 inode_unlock_shared(inode);
453 *ilock_shared = false;
454 inode_lock(inode);
455 goto restart;
456 }
457
458 ret = file_modified(file);
459 if (ret < 0)
460 goto out;
461
462 return count;
463out:
464 if (*ilock_shared)
465 inode_unlock_shared(inode);
466 else
467 inode_unlock(inode);
468 return ret;
469}
470
471static ssize_t ext4_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
472{
473 ssize_t ret;
474 handle_t *handle;
475 struct inode *inode = file_inode(iocb->ki_filp);
476 loff_t offset = iocb->ki_pos;
477 size_t count = iov_iter_count(from);
478 const struct iomap_ops *iomap_ops = &ext4_iomap_ops;
479 bool extend = false, unaligned_io = false;
480 bool ilock_shared = true;
481
482
483
484
485
486 if (ext4_unaligned_io(inode, from, offset)) {
487 unaligned_io = true;
488 ilock_shared = false;
489 }
490
491
492
493
494
495 if (offset + count > i_size_read(inode))
496 ilock_shared = false;
497
498 if (iocb->ki_flags & IOCB_NOWAIT) {
499 if (ilock_shared) {
500 if (!inode_trylock_shared(inode))
501 return -EAGAIN;
502 } else {
503 if (!inode_trylock(inode))
504 return -EAGAIN;
505 }
506 } else {
507 if (ilock_shared)
508 inode_lock_shared(inode);
509 else
510 inode_lock(inode);
511 }
512
513
514 if (!ext4_dio_supported(inode)) {
515 if (ilock_shared)
516 inode_unlock_shared(inode);
517 else
518 inode_unlock(inode);
519 return ext4_buffered_write_iter(iocb, from);
520 }
521
522 ret = ext4_dio_write_checks(iocb, from, &ilock_shared, &extend);
523 if (ret <= 0)
524 return ret;
525
526
527 if ((iocb->ki_flags & IOCB_NOWAIT) && (unaligned_io || extend)) {
528 ret = -EAGAIN;
529 goto out;
530 }
531
532 offset = iocb->ki_pos;
533 count = ret;
534
535
536
537
538
539
540
541
542
543
544
545 if (unaligned_io)
546 inode_dio_wait(inode);
547
548 if (extend) {
549 handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
550 if (IS_ERR(handle)) {
551 ret = PTR_ERR(handle);
552 goto out;
553 }
554
555 ext4_fc_start_update(inode);
556 ret = ext4_orphan_add(handle, inode);
557 ext4_fc_stop_update(inode);
558 if (ret) {
559 ext4_journal_stop(handle);
560 goto out;
561 }
562
563 ext4_journal_stop(handle);
564 }
565
566 if (ilock_shared)
567 iomap_ops = &ext4_iomap_overwrite_ops;
568 ret = iomap_dio_rw(iocb, from, iomap_ops, &ext4_dio_write_ops,
569 (unaligned_io || extend) ? IOMAP_DIO_FORCE_WAIT : 0);
570 if (ret == -ENOTBLK)
571 ret = 0;
572
573 if (extend)
574 ret = ext4_handle_inode_extension(inode, offset, ret, count);
575
576out:
577 if (ilock_shared)
578 inode_unlock_shared(inode);
579 else
580 inode_unlock(inode);
581
582 if (ret >= 0 && iov_iter_count(from)) {
583 ssize_t err;
584 loff_t endbyte;
585
586 offset = iocb->ki_pos;
587 err = ext4_buffered_write_iter(iocb, from);
588 if (err < 0)
589 return err;
590
591
592
593
594
595
596
597
598 ret += err;
599 endbyte = offset + err - 1;
600 err = filemap_write_and_wait_range(iocb->ki_filp->f_mapping,
601 offset, endbyte);
602 if (!err)
603 invalidate_mapping_pages(iocb->ki_filp->f_mapping,
604 offset >> PAGE_SHIFT,
605 endbyte >> PAGE_SHIFT);
606 }
607
608 return ret;
609}
610
611#ifdef CONFIG_FS_DAX
612static ssize_t
613ext4_dax_write_iter(struct kiocb *iocb, struct iov_iter *from)
614{
615 ssize_t ret;
616 size_t count;
617 loff_t offset;
618 handle_t *handle;
619 bool extend = false;
620 struct inode *inode = file_inode(iocb->ki_filp);
621
622 if (iocb->ki_flags & IOCB_NOWAIT) {
623 if (!inode_trylock(inode))
624 return -EAGAIN;
625 } else {
626 inode_lock(inode);
627 }
628
629 ret = ext4_write_checks(iocb, from);
630 if (ret <= 0)
631 goto out;
632
633 offset = iocb->ki_pos;
634 count = iov_iter_count(from);
635
636 if (offset + count > EXT4_I(inode)->i_disksize) {
637 handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
638 if (IS_ERR(handle)) {
639 ret = PTR_ERR(handle);
640 goto out;
641 }
642
643 ret = ext4_orphan_add(handle, inode);
644 if (ret) {
645 ext4_journal_stop(handle);
646 goto out;
647 }
648
649 extend = true;
650 ext4_journal_stop(handle);
651 }
652
653 ret = dax_iomap_rw(iocb, from, &ext4_iomap_ops);
654
655 if (extend)
656 ret = ext4_handle_inode_extension(inode, offset, ret, count);
657out:
658 inode_unlock(inode);
659 if (ret > 0)
660 ret = generic_write_sync(iocb, ret);
661 return ret;
662}
663#endif
664
665static ssize_t
666ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
667{
668 struct inode *inode = file_inode(iocb->ki_filp);
669
670 if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
671 return -EIO;
672
673#ifdef CONFIG_FS_DAX
674 if (IS_DAX(inode))
675 return ext4_dax_write_iter(iocb, from);
676#endif
677 if (iocb->ki_flags & IOCB_DIRECT)
678 return ext4_dio_write_iter(iocb, from);
679 else
680 return ext4_buffered_write_iter(iocb, from);
681}
682
683#ifdef CONFIG_FS_DAX
684static vm_fault_t ext4_dax_huge_fault(struct vm_fault *vmf,
685 enum page_entry_size pe_size)
686{
687 int error = 0;
688 vm_fault_t result;
689 int retries = 0;
690 handle_t *handle = NULL;
691 struct inode *inode = file_inode(vmf->vma->vm_file);
692 struct super_block *sb = inode->i_sb;
693
694
695
696
697
698
699
700
701
702
703
704
705 bool write = (vmf->flags & FAULT_FLAG_WRITE) &&
706 (vmf->vma->vm_flags & VM_SHARED);
707 struct address_space *mapping = vmf->vma->vm_file->f_mapping;
708 pfn_t pfn;
709
710 if (write) {
711 sb_start_pagefault(sb);
712 file_update_time(vmf->vma->vm_file);
713 filemap_invalidate_lock_shared(mapping);
714retry:
715 handle = ext4_journal_start_sb(sb, EXT4_HT_WRITE_PAGE,
716 EXT4_DATA_TRANS_BLOCKS(sb));
717 if (IS_ERR(handle)) {
718 filemap_invalidate_unlock_shared(mapping);
719 sb_end_pagefault(sb);
720 return VM_FAULT_SIGBUS;
721 }
722 } else {
723 filemap_invalidate_lock_shared(mapping);
724 }
725 result = dax_iomap_fault(vmf, pe_size, &pfn, &error, &ext4_iomap_ops);
726 if (write) {
727 ext4_journal_stop(handle);
728
729 if ((result & VM_FAULT_ERROR) && error == -ENOSPC &&
730 ext4_should_retry_alloc(sb, &retries))
731 goto retry;
732
733 if (result & VM_FAULT_NEEDDSYNC)
734 result = dax_finish_sync_fault(vmf, pe_size, pfn);
735 filemap_invalidate_unlock_shared(mapping);
736 sb_end_pagefault(sb);
737 } else {
738 filemap_invalidate_unlock_shared(mapping);
739 }
740
741 return result;
742}
743
744static vm_fault_t ext4_dax_fault(struct vm_fault *vmf)
745{
746 return ext4_dax_huge_fault(vmf, PE_SIZE_PTE);
747}
748
749static const struct vm_operations_struct ext4_dax_vm_ops = {
750 .fault = ext4_dax_fault,
751 .huge_fault = ext4_dax_huge_fault,
752 .page_mkwrite = ext4_dax_fault,
753 .pfn_mkwrite = ext4_dax_fault,
754};
755#else
756#define ext4_dax_vm_ops ext4_file_vm_ops
757#endif
758
759static const struct vm_operations_struct ext4_file_vm_ops = {
760 .fault = filemap_fault,
761 .map_pages = filemap_map_pages,
762 .page_mkwrite = ext4_page_mkwrite,
763};
764
765static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
766{
767 struct inode *inode = file->f_mapping->host;
768 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
769 struct dax_device *dax_dev = sbi->s_daxdev;
770
771 if (unlikely(ext4_forced_shutdown(sbi)))
772 return -EIO;
773
774
775
776
777
778 if (!daxdev_mapping_supported(vma, dax_dev))
779 return -EOPNOTSUPP;
780
781 file_accessed(file);
782 if (IS_DAX(file_inode(file))) {
783 vma->vm_ops = &ext4_dax_vm_ops;
784 vma->vm_flags |= VM_HUGEPAGE;
785 } else {
786 vma->vm_ops = &ext4_file_vm_ops;
787 }
788 return 0;
789}
790
791static int ext4_sample_last_mounted(struct super_block *sb,
792 struct vfsmount *mnt)
793{
794 struct ext4_sb_info *sbi = EXT4_SB(sb);
795 struct path path;
796 char buf[64], *cp;
797 handle_t *handle;
798 int err;
799
800 if (likely(ext4_test_mount_flag(sb, EXT4_MF_MNTDIR_SAMPLED)))
801 return 0;
802
803 if (sb_rdonly(sb) || !sb_start_intwrite_trylock(sb))
804 return 0;
805
806 ext4_set_mount_flag(sb, EXT4_MF_MNTDIR_SAMPLED);
807
808
809
810
811
812
813 memset(buf, 0, sizeof(buf));
814 path.mnt = mnt;
815 path.dentry = mnt->mnt_root;
816 cp = d_path(&path, buf, sizeof(buf));
817 err = 0;
818 if (IS_ERR(cp))
819 goto out;
820
821 handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
822 err = PTR_ERR(handle);
823 if (IS_ERR(handle))
824 goto out;
825 BUFFER_TRACE(sbi->s_sbh, "get_write_access");
826 err = ext4_journal_get_write_access(handle, sb, sbi->s_sbh,
827 EXT4_JTR_NONE);
828 if (err)
829 goto out_journal;
830 lock_buffer(sbi->s_sbh);
831 strncpy(sbi->s_es->s_last_mounted, cp,
832 sizeof(sbi->s_es->s_last_mounted));
833 ext4_superblock_csum_set(sb);
834 unlock_buffer(sbi->s_sbh);
835 ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh);
836out_journal:
837 ext4_journal_stop(handle);
838out:
839 sb_end_intwrite(sb);
840 return err;
841}
842
843static int ext4_file_open(struct inode *inode, struct file *filp)
844{
845 int ret;
846
847 if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
848 return -EIO;
849
850 ret = ext4_sample_last_mounted(inode->i_sb, filp->f_path.mnt);
851 if (ret)
852 return ret;
853
854 ret = fscrypt_file_open(inode, filp);
855 if (ret)
856 return ret;
857
858 ret = fsverity_file_open(inode, filp);
859 if (ret)
860 return ret;
861
862
863
864
865
866 if (filp->f_mode & FMODE_WRITE) {
867 ret = ext4_inode_attach_jinode(inode);
868 if (ret < 0)
869 return ret;
870 }
871
872 filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC;
873 return dquot_file_open(inode, filp);
874}
875
876
877
878
879
880
881loff_t ext4_llseek(struct file *file, loff_t offset, int whence)
882{
883 struct inode *inode = file->f_mapping->host;
884 loff_t maxbytes;
885
886 if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
887 maxbytes = EXT4_SB(inode->i_sb)->s_bitmap_maxbytes;
888 else
889 maxbytes = inode->i_sb->s_maxbytes;
890
891 switch (whence) {
892 default:
893 return generic_file_llseek_size(file, offset, whence,
894 maxbytes, i_size_read(inode));
895 case SEEK_HOLE:
896 inode_lock_shared(inode);
897 offset = iomap_seek_hole(inode, offset,
898 &ext4_iomap_report_ops);
899 inode_unlock_shared(inode);
900 break;
901 case SEEK_DATA:
902 inode_lock_shared(inode);
903 offset = iomap_seek_data(inode, offset,
904 &ext4_iomap_report_ops);
905 inode_unlock_shared(inode);
906 break;
907 }
908
909 if (offset < 0)
910 return offset;
911 return vfs_setpos(file, offset, maxbytes);
912}
913
914const struct file_operations ext4_file_operations = {
915 .llseek = ext4_llseek,
916 .read_iter = ext4_file_read_iter,
917 .write_iter = ext4_file_write_iter,
918 .iopoll = iomap_dio_iopoll,
919 .unlocked_ioctl = ext4_ioctl,
920#ifdef CONFIG_COMPAT
921 .compat_ioctl = ext4_compat_ioctl,
922#endif
923 .mmap = ext4_file_mmap,
924 .mmap_supported_flags = MAP_SYNC,
925 .open = ext4_file_open,
926 .release = ext4_release_file,
927 .fsync = ext4_sync_file,
928 .get_unmapped_area = thp_get_unmapped_area,
929 .splice_read = generic_file_splice_read,
930 .splice_write = iter_file_splice_write,
931 .fallocate = ext4_fallocate,
932};
933
934const struct inode_operations ext4_file_inode_operations = {
935 .setattr = ext4_setattr,
936 .getattr = ext4_file_getattr,
937 .listxattr = ext4_listxattr,
938 .get_acl = ext4_get_acl,
939 .set_acl = ext4_set_acl,
940 .fiemap = ext4_fiemap,
941 .fileattr_get = ext4_fileattr_get,
942 .fileattr_set = ext4_fileattr_set,
943};
944
945