1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
6 * Regular file handling primitives for NTFS-based filesystems.
10 #include <linux/backing-dev.h>
11 #include <linux/blkdev.h>
12 #include <linux/buffer_head.h>
13 #include <linux/compat.h>
14 #include <linux/falloc.h>
15 #include <linux/fiemap.h>
21 static int ntfs_ioctl_fitrim(struct ntfs_sb_info *sbi, unsigned long arg)
23 struct fstrim_range __user *user_range;
24 struct fstrim_range range;
25 struct block_device *dev;
28 if (!capable(CAP_SYS_ADMIN))
31 dev = sbi->sb->s_bdev;
32 if (!bdev_max_discard_sectors(dev))
35 user_range = (struct fstrim_range __user *)arg;
36 if (copy_from_user(&range, user_range, sizeof(range)))
39 range.minlen = max_t(u32, range.minlen, bdev_discard_granularity(dev));
41 err = ntfs_trim_fs(sbi, &range);
45 if (copy_to_user(user_range, &range, sizeof(range)))
51 static long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg)
53 struct inode *inode = file_inode(filp);
54 struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
58 return ntfs_ioctl_fitrim(sbi, arg);
60 return -ENOTTY; /* Inappropriate ioctl for device. */
64 static long ntfs_compat_ioctl(struct file *filp, u32 cmd, unsigned long arg)
67 return ntfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
72 * ntfs_getattr - inode_operations::getattr
74 int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path,
75 struct kstat *stat, u32 request_mask, u32 flags)
77 struct inode *inode = d_inode(path->dentry);
78 struct ntfs_inode *ni = ntfs_i(inode);
80 if (is_compressed(ni))
81 stat->attributes |= STATX_ATTR_COMPRESSED;
84 stat->attributes |= STATX_ATTR_ENCRYPTED;
86 stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED;
88 generic_fillattr(idmap, request_mask, inode, stat);
90 stat->result_mask |= STATX_BTIME;
91 stat->btime = ni->i_crtime;
92 stat->blksize = ni->mi.sbi->cluster_size; /* 512, 1K, ..., 2M */
97 static int ntfs_extend_initialized_size(struct file *file,
98 struct ntfs_inode *ni,
100 const loff_t new_valid)
102 struct inode *inode = &ni->vfs_inode;
103 struct address_space *mapping = inode->i_mapping;
104 struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
108 if (is_resident(ni)) {
109 ni->i_valid = new_valid;
113 WARN_ON(is_compressed(ni));
114 WARN_ON(valid >= new_valid);
122 if (is_sparsed(ni)) {
123 bits = sbi->cluster_bits;
126 err = attr_data_get_block(ni, vcn, 1, &lcn, &clen, NULL,
131 if (lcn == SPARSE_LCN) {
132 pos = ((loff_t)clen + vcn) << bits;
138 zerofrom = pos & (PAGE_SIZE - 1);
139 len = PAGE_SIZE - zerofrom;
141 if (pos + len > new_valid)
142 len = new_valid - pos;
144 err = ntfs_write_begin(file, mapping, pos, len, &page, NULL);
148 zero_user_segment(page, zerofrom, PAGE_SIZE);
150 /* This function in any case puts page. */
151 err = ntfs_write_end(file, mapping, pos, len, len, page, NULL);
157 if (pos >= new_valid)
160 balance_dirty_pages_ratelimited(mapping);
168 ntfs_inode_warn(inode, "failed to extend initialized size to %llx.",
174 * ntfs_zero_range - Helper function for punch_hole.
176 * It zeroes a range [vbo, vbo_to).
178 static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to)
181 struct address_space *mapping = inode->i_mapping;
182 u32 blocksize = i_blocksize(inode);
183 pgoff_t idx = vbo >> PAGE_SHIFT;
184 u32 from = vbo & (PAGE_SIZE - 1);
185 pgoff_t idx_end = (vbo_to + PAGE_SIZE - 1) >> PAGE_SHIFT;
187 struct buffer_head *head, *bh;
188 u32 bh_next, bh_off, to;
192 for (; idx < idx_end; idx += 1, from = 0) {
193 page_off = (loff_t)idx << PAGE_SHIFT;
194 to = (page_off + PAGE_SIZE) > vbo_to ? (vbo_to - page_off) :
196 iblock = page_off >> inode->i_blkbits;
198 folio = __filemap_get_folio(mapping, idx,
199 FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
200 mapping_gfp_constraint(mapping, ~__GFP_FS));
202 return PTR_ERR(folio);
204 head = folio_buffers(folio);
206 head = create_empty_buffers(folio, blocksize, 0);
211 bh_next = bh_off + blocksize;
213 if (bh_next <= from || bh_off >= to)
216 if (!buffer_mapped(bh)) {
217 ntfs_get_block(inode, iblock, bh, 0);
218 /* Unmapped? It's a hole - nothing to do. */
219 if (!buffer_mapped(bh))
223 /* Ok, it's mapped. Make sure it's up-to-date. */
224 if (folio_test_uptodate(folio))
225 set_buffer_uptodate(bh);
227 if (!buffer_uptodate(bh)) {
228 err = bh_read(bh, 0);
236 mark_buffer_dirty(bh);
238 } while (bh_off = bh_next, iblock += 1,
239 head != (bh = bh->b_this_page));
241 folio_zero_segment(folio, from, to);
248 mark_inode_dirty(inode);
253 * ntfs_file_mmap - file_operations::mmap
255 static int ntfs_file_mmap(struct file *file, struct vm_area_struct *vma)
257 struct address_space *mapping = file->f_mapping;
258 struct inode *inode = mapping->host;
259 struct ntfs_inode *ni = ntfs_i(inode);
260 u64 from = ((u64)vma->vm_pgoff << PAGE_SHIFT);
261 bool rw = vma->vm_flags & VM_WRITE;
264 if (is_encrypted(ni)) {
265 ntfs_inode_warn(inode, "mmap encrypted not supported");
270 ntfs_inode_warn(inode, "mmap deduplicated not supported");
274 if (is_compressed(ni) && rw) {
275 ntfs_inode_warn(inode, "mmap(write) compressed not supported");
280 u64 to = min_t(loff_t, i_size_read(inode),
281 from + vma->vm_end - vma->vm_start);
283 if (is_sparsed(ni)) {
284 /* Allocate clusters for rw map. */
285 struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
287 CLST vcn = from >> sbi->cluster_bits;
288 CLST end = bytes_to_cluster(sbi, to);
291 for (; vcn < end; vcn += len) {
292 err = attr_data_get_block(ni, vcn, 1, &lcn,
299 if (ni->i_valid < to) {
300 if (!inode_trylock(inode)) {
304 err = ntfs_extend_initialized_size(file, ni,
312 err = generic_file_mmap(file, vma);
317 static int ntfs_extend(struct inode *inode, loff_t pos, size_t count,
320 struct ntfs_inode *ni = ntfs_i(inode);
321 struct address_space *mapping = inode->i_mapping;
322 loff_t end = pos + count;
323 bool extend_init = file && pos > ni->i_valid;
326 if (end <= inode->i_size && !extend_init)
329 /* Mark rw ntfs as dirty. It will be cleared at umount. */
330 ntfs_set_state(ni->mi.sbi, NTFS_DIRTY_DIRTY);
332 if (end > inode->i_size) {
333 err = ntfs_set_size(inode, end);
338 if (extend_init && !is_compressed(ni)) {
339 err = ntfs_extend_initialized_size(file, ni, ni->i_valid, pos);
346 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
347 mark_inode_dirty(inode);
349 if (IS_SYNC(inode)) {
352 err = filemap_fdatawrite_range(mapping, pos, end - 1);
353 err2 = sync_mapping_buffers(mapping);
356 err2 = write_inode_now(inode, 1);
360 err = filemap_fdatawait_range(mapping, pos, end - 1);
367 static int ntfs_truncate(struct inode *inode, loff_t new_size)
369 struct super_block *sb = inode->i_sb;
370 struct ntfs_inode *ni = ntfs_i(inode);
374 if (!S_ISREG(inode->i_mode))
377 if (is_compressed(ni)) {
378 if (ni->i_valid > new_size)
379 ni->i_valid = new_size;
381 err = block_truncate_page(inode->i_mapping, new_size,
387 new_valid = ntfs_up_block(sb, min_t(u64, ni->i_valid, new_size));
389 truncate_setsize(inode, new_size);
393 down_write(&ni->file.run_lock);
394 err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size,
395 &new_valid, ni->mi.sbi->options->prealloc, NULL);
396 up_write(&ni->file.run_lock);
398 if (new_valid < ni->i_valid)
399 ni->i_valid = new_valid;
403 ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE;
404 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
405 if (!IS_DIRSYNC(inode)) {
408 err = ntfs_sync_inode(inode);
414 mark_inode_dirty(inode);
416 /*ntfs_flush_inodes(inode->i_sb, inode, NULL);*/
424 * Preallocate space for a file. This implements ntfs's fallocate file
425 * operation, which gets called from sys_fallocate system call. User
426 * space requests 'len' bytes at 'vbo'. If FALLOC_FL_KEEP_SIZE is set
427 * we just allocate clusters without zeroing them out. Otherwise we
428 * allocate and zero out clusters via an expanding truncate.
430 static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len)
432 struct inode *inode = file->f_mapping->host;
433 struct address_space *mapping = inode->i_mapping;
434 struct super_block *sb = inode->i_sb;
435 struct ntfs_sb_info *sbi = sb->s_fs_info;
436 struct ntfs_inode *ni = ntfs_i(inode);
437 loff_t end = vbo + len;
438 loff_t vbo_down = round_down(vbo, max_t(unsigned long,
439 sbi->cluster_size, PAGE_SIZE));
440 bool is_supported_holes = is_sparsed(ni) || is_compressed(ni);
441 loff_t i_size, new_size;
445 /* No support for dir. */
446 if (!S_ISREG(inode->i_mode))
450 * vfs_fallocate checks all possible combinations of mode.
451 * Do additional checks here before ntfs_set_state(dirty).
453 if (mode & FALLOC_FL_PUNCH_HOLE) {
454 if (!is_supported_holes)
456 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
457 } else if (mode & FALLOC_FL_INSERT_RANGE) {
458 if (!is_supported_holes)
461 ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
462 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)) {
463 ntfs_inode_warn(inode, "fallocate(0x%x) is not supported",
468 ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
471 i_size = inode->i_size;
472 new_size = max(end, i_size);
475 if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) {
476 /* Should never be here, see ntfs_file_open. */
481 if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
482 FALLOC_FL_INSERT_RANGE)) {
483 inode_dio_wait(inode);
484 filemap_invalidate_lock(mapping);
488 if (mode & FALLOC_FL_PUNCH_HOLE) {
490 loff_t mask, vbo_a, end_a, tmp;
492 err = filemap_write_and_wait_range(mapping, vbo_down,
497 truncate_pagecache(inode, vbo_down);
500 err = attr_punch_hole(ni, vbo, len, &frame_size);
502 if (err != E_NTFS_NOTALIGNED)
505 /* Process not aligned punch. */
506 mask = frame_size - 1;
507 vbo_a = (vbo + mask) & ~mask;
510 tmp = min(vbo_a, end);
512 err = ntfs_zero_range(inode, vbo, tmp);
517 if (vbo < end_a && end_a < end) {
518 err = ntfs_zero_range(inode, end_a, end);
523 /* Aligned punch_hole */
526 err = attr_punch_hole(ni, vbo_a, end_a - vbo_a, NULL);
529 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
531 * Write tail of the last page before removed range since
532 * it will get removed from the page cache below.
534 err = filemap_write_and_wait_range(mapping, vbo_down, vbo);
539 * Write data that will be shifted to preserve them
540 * when discarding page cache below.
542 err = filemap_write_and_wait_range(mapping, end, LLONG_MAX);
546 truncate_pagecache(inode, vbo_down);
549 err = attr_collapse_range(ni, vbo, len);
551 } else if (mode & FALLOC_FL_INSERT_RANGE) {
552 /* Check new size. */
553 err = inode_newsize_ok(inode, new_size);
557 /* Write out all dirty pages. */
558 err = filemap_write_and_wait_range(mapping, vbo_down,
562 truncate_pagecache(inode, vbo_down);
565 err = attr_insert_range(ni, vbo, len);
568 /* Check new size. */
569 u8 cluster_bits = sbi->cluster_bits;
571 /* generic/213: expected -ENOSPC instead of -EFBIG. */
572 if (!is_supported_holes) {
573 loff_t to_alloc = new_size - inode_get_bytes(inode);
576 (to_alloc >> cluster_bits) >
577 wnd_zeroes(&sbi->used.bitmap)) {
583 err = inode_newsize_ok(inode, new_size);
587 if (new_size > i_size) {
589 * Allocate clusters, do not change 'valid' size.
591 err = ntfs_set_size(inode, new_size);
596 if (is_supported_holes) {
597 CLST vcn = vbo >> cluster_bits;
598 CLST cend = bytes_to_cluster(sbi, end);
599 CLST cend_v = bytes_to_cluster(sbi, ni->i_valid);
607 * Allocate and zero new clusters.
608 * Zeroing these clusters may be too long.
610 for (; vcn < cend_v; vcn += clen) {
611 err = attr_data_get_block(ni, vcn, cend_v - vcn,
618 * Allocate but not zero new clusters.
620 for (; vcn < cend; vcn += clen) {
621 err = attr_data_get_block(ni, vcn, cend - vcn,
629 if (mode & FALLOC_FL_KEEP_SIZE) {
631 /* True - Keep preallocated. */
632 err = attr_set_size(ni, ATTR_DATA, NULL, 0,
633 &ni->file.run, i_size, &ni->i_valid,
636 } else if (new_size > i_size) {
637 inode->i_size = new_size;
643 filemap_invalidate_unlock(mapping);
646 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
647 mark_inode_dirty(inode);
655 * ntfs3_setattr - inode_operations::setattr
657 int ntfs3_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
660 struct inode *inode = d_inode(dentry);
661 struct ntfs_inode *ni = ntfs_i(inode);
662 u32 ia_valid = attr->ia_valid;
663 umode_t mode = inode->i_mode;
666 err = setattr_prepare(idmap, dentry, attr);
670 if (ia_valid & ATTR_SIZE) {
671 loff_t newsize, oldsize;
673 if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) {
674 /* Should never be here, see ntfs_file_open(). */
678 inode_dio_wait(inode);
679 oldsize = inode->i_size;
680 newsize = attr->ia_size;
682 if (newsize <= oldsize)
683 err = ntfs_truncate(inode, newsize);
685 err = ntfs_extend(inode, newsize, 0, NULL);
690 ni->ni_flags |= NI_FLAG_UPDATE_PARENT;
691 inode->i_size = newsize;
694 setattr_copy(idmap, inode, attr);
696 if (mode != inode->i_mode) {
697 err = ntfs_acl_chmod(idmap, dentry);
701 /* Linux 'w' -> Windows 'ro'. */
702 if (0222 & inode->i_mode)
703 ni->std_fa &= ~FILE_ATTRIBUTE_READONLY;
705 ni->std_fa |= FILE_ATTRIBUTE_READONLY;
708 if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE))
709 ntfs_save_wsl_perm(inode, NULL);
710 mark_inode_dirty(inode);
715 static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
717 struct file *file = iocb->ki_filp;
718 struct inode *inode = file->f_mapping->host;
719 struct ntfs_inode *ni = ntfs_i(inode);
721 if (is_encrypted(ni)) {
722 ntfs_inode_warn(inode, "encrypted i/o not supported");
726 if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) {
727 ntfs_inode_warn(inode, "direct i/o + compressed not supported");
731 #ifndef CONFIG_NTFS3_LZX_XPRESS
732 if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) {
735 "activate CONFIG_NTFS3_LZX_XPRESS to read external compressed files");
741 ntfs_inode_warn(inode, "read deduplicated not supported");
745 return generic_file_read_iter(iocb, iter);
748 static ssize_t ntfs_file_splice_read(struct file *in, loff_t *ppos,
749 struct pipe_inode_info *pipe, size_t len,
752 struct inode *inode = in->f_mapping->host;
753 struct ntfs_inode *ni = ntfs_i(inode);
755 if (is_encrypted(ni)) {
756 ntfs_inode_warn(inode, "encrypted i/o not supported");
760 #ifndef CONFIG_NTFS3_LZX_XPRESS
761 if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) {
764 "activate CONFIG_NTFS3_LZX_XPRESS to read external compressed files");
770 ntfs_inode_warn(inode, "read deduplicated not supported");
774 return filemap_splice_read(in, ppos, pipe, len, flags);
778 * ntfs_get_frame_pages
780 * Return: Array of locked pages.
782 static int ntfs_get_frame_pages(struct address_space *mapping, pgoff_t index,
783 struct page **pages, u32 pages_per_frame,
784 bool *frame_uptodate)
786 gfp_t gfp_mask = mapping_gfp_mask(mapping);
789 *frame_uptodate = true;
791 for (npages = 0; npages < pages_per_frame; npages++, index++) {
794 page = find_or_create_page(mapping, index, gfp_mask);
797 page = pages[npages];
805 if (!PageUptodate(page))
806 *frame_uptodate = false;
808 pages[npages] = page;
815 * ntfs_compress_write - Helper for ntfs_file_write_iter() (compressed files).
817 static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from)
820 struct file *file = iocb->ki_filp;
821 size_t count = iov_iter_count(from);
822 loff_t pos = iocb->ki_pos;
823 struct inode *inode = file_inode(file);
824 loff_t i_size = inode->i_size;
825 struct address_space *mapping = inode->i_mapping;
826 struct ntfs_inode *ni = ntfs_i(inode);
827 u64 valid = ni->i_valid;
828 struct ntfs_sb_info *sbi = ni->mi.sbi;
829 struct page *page, **pages = NULL;
831 u8 frame_bits = NTFS_LZNT_CUNIT + sbi->cluster_bits;
832 u32 frame_size = 1u << frame_bits;
833 u32 pages_per_frame = frame_size >> PAGE_SHIFT;
840 if (frame_size < PAGE_SIZE) {
842 * frame_size == 8K if cluster 512
843 * frame_size == 64K if cluster 4096
845 ntfs_inode_warn(inode, "page size is bigger than frame size");
849 pages = kmalloc_array(pages_per_frame, sizeof(struct page *), GFP_NOFS);
853 err = file_remove_privs(file);
857 err = file_update_time(file);
861 /* Zero range [valid : pos). */
862 while (valid < pos) {
865 frame = valid >> frame_bits;
866 frame_vbo = valid & ~(frame_size - 1);
867 off = valid & (frame_size - 1);
869 err = attr_data_get_block(ni, frame << NTFS_LZNT_CUNIT, 1, &lcn,
874 if (lcn == SPARSE_LCN) {
875 ni->i_valid = valid =
876 frame_vbo + ((u64)clen << sbi->cluster_bits);
880 /* Load full frame. */
881 err = ntfs_get_frame_pages(mapping, frame_vbo >> PAGE_SHIFT,
882 pages, pages_per_frame,
887 if (!frame_uptodate && off) {
888 err = ni_read_frame(ni, frame_vbo, pages,
891 for (ip = 0; ip < pages_per_frame; ip++) {
900 ip = off >> PAGE_SHIFT;
901 off = offset_in_page(valid);
902 for (; ip < pages_per_frame; ip++, off = 0) {
904 zero_user_segment(page, off, PAGE_SIZE);
905 flush_dcache_page(page);
906 SetPageUptodate(page);
910 err = ni_write_frame(ni, pages, pages_per_frame);
913 for (ip = 0; ip < pages_per_frame; ip++) {
915 SetPageUptodate(page);
923 ni->i_valid = valid = frame_vbo + frame_size;
926 /* Copy user data [pos : pos + count). */
928 size_t copied, bytes;
930 off = pos & (frame_size - 1);
931 bytes = frame_size - off;
935 frame_vbo = pos & ~(frame_size - 1);
936 index = frame_vbo >> PAGE_SHIFT;
938 if (unlikely(fault_in_iov_iter_readable(from, bytes))) {
943 /* Load full frame. */
944 err = ntfs_get_frame_pages(mapping, index, pages,
945 pages_per_frame, &frame_uptodate);
949 if (!frame_uptodate) {
950 loff_t to = pos + bytes;
952 if (off || (to < i_size && (to & (frame_size - 1)))) {
953 err = ni_read_frame(ni, frame_vbo, pages,
956 for (ip = 0; ip < pages_per_frame;
969 ip = off >> PAGE_SHIFT;
970 off = offset_in_page(pos);
972 /* Copy user data to pages. */
974 size_t cp, tail = PAGE_SIZE - off;
977 cp = copy_page_from_iter_atomic(page, off,
978 min(tail, bytes), from);
979 flush_dcache_page(page);
995 err = ni_write_frame(ni, pages, pages_per_frame);
998 for (ip = 0; ip < pages_per_frame; ip++) {
1000 ClearPageDirty(page);
1001 SetPageUptodate(page);
1010 * We can loop for a long time in here. Be nice and allow
1011 * us to schedule out to avoid softlocking if preempt
1019 count = iov_iter_count(from);
1028 iocb->ki_pos += written;
1029 if (iocb->ki_pos > ni->i_valid)
1030 ni->i_valid = iocb->ki_pos;
1036 * ntfs_file_write_iter - file_operations::write_iter
1038 static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
1040 struct file *file = iocb->ki_filp;
1041 struct address_space *mapping = file->f_mapping;
1042 struct inode *inode = mapping->host;
1044 struct ntfs_inode *ni = ntfs_i(inode);
1046 if (is_encrypted(ni)) {
1047 ntfs_inode_warn(inode, "encrypted i/o not supported");
1051 if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) {
1052 ntfs_inode_warn(inode, "direct i/o + compressed not supported");
1057 ntfs_inode_warn(inode, "write into deduplicated not supported");
1061 if (!inode_trylock(inode)) {
1062 if (iocb->ki_flags & IOCB_NOWAIT)
1067 ret = generic_write_checks(iocb, from);
1071 if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) {
1072 /* Should never be here, see ntfs_file_open(). */
1077 ret = ntfs_extend(inode, iocb->ki_pos, ret, file);
1081 ret = is_compressed(ni) ? ntfs_compress_write(iocb, from) :
1082 __generic_file_write_iter(iocb, from);
1085 inode_unlock(inode);
1088 ret = generic_write_sync(iocb, ret);
1094 * ntfs_file_open - file_operations::open
1096 int ntfs_file_open(struct inode *inode, struct file *file)
1098 struct ntfs_inode *ni = ntfs_i(inode);
1100 if (unlikely((is_compressed(ni) || is_encrypted(ni)) &&
1101 (file->f_flags & O_DIRECT))) {
1105 /* Decompress "external compressed" file if opened for rw. */
1106 if ((ni->ni_flags & NI_FLAG_COMPRESSED_MASK) &&
1107 (file->f_flags & (O_WRONLY | O_RDWR | O_TRUNC))) {
1108 #ifdef CONFIG_NTFS3_LZX_XPRESS
1109 int err = ni_decompress_file(ni);
1116 "activate CONFIG_NTFS3_LZX_XPRESS to write external compressed files");
1121 return generic_file_open(inode, file);
1125 * ntfs_file_release - file_operations::release
1127 static int ntfs_file_release(struct inode *inode, struct file *file)
1129 struct ntfs_inode *ni = ntfs_i(inode);
1130 struct ntfs_sb_info *sbi = ni->mi.sbi;
1133 /* If we are last writer on the inode, drop the block reservation. */
1134 if (sbi->options->prealloc &&
1135 ((file->f_mode & FMODE_WRITE) &&
1136 atomic_read(&inode->i_writecount) == 1)) {
1138 down_write(&ni->file.run_lock);
1140 err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run,
1141 inode->i_size, &ni->i_valid, false, NULL);
1143 up_write(&ni->file.run_lock);
1150 * ntfs_fiemap - file_operations::fiemap
1152 int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1153 __u64 start, __u64 len)
1156 struct ntfs_inode *ni = ntfs_i(inode);
1158 err = fiemap_prep(inode, fieinfo, start, &len, ~FIEMAP_FLAG_XATTR);
1164 err = ni_fiemap(ni, fieinfo, start, len);
1172 const struct inode_operations ntfs_file_inode_operations = {
1173 .getattr = ntfs_getattr,
1174 .setattr = ntfs3_setattr,
1175 .listxattr = ntfs_listxattr,
1176 .get_acl = ntfs_get_acl,
1177 .set_acl = ntfs_set_acl,
1178 .fiemap = ntfs_fiemap,
1181 const struct file_operations ntfs_file_operations = {
1182 .llseek = generic_file_llseek,
1183 .read_iter = ntfs_file_read_iter,
1184 .write_iter = ntfs_file_write_iter,
1185 .unlocked_ioctl = ntfs_ioctl,
1186 #ifdef CONFIG_COMPAT
1187 .compat_ioctl = ntfs_compat_ioctl,
1189 .splice_read = ntfs_file_splice_read,
1190 .mmap = ntfs_file_mmap,
1191 .open = ntfs_file_open,
1192 .fsync = generic_file_fsync,
1193 .splice_write = iter_file_splice_write,
1194 .fallocate = ntfs_fallocate,
1195 .release = ntfs_file_release,