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4342306f KK |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * | |
4 | * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. | |
5 | * | |
e8b8e97f KA |
6 | * Regular file handling primitives for NTFS-based filesystems. |
7 | * | |
4342306f | 8 | */ |
e8b8e97f | 9 | |
4342306f | 10 | #include <linux/backing-dev.h> |
ccdf7741 | 11 | #include <linux/blkdev.h> |
4342306f KK |
12 | #include <linux/buffer_head.h> |
13 | #include <linux/compat.h> | |
14 | #include <linux/falloc.h> | |
15 | #include <linux/fiemap.h> | |
4342306f KK |
16 | |
17 | #include "debug.h" | |
18 | #include "ntfs.h" | |
19 | #include "ntfs_fs.h" | |
20 | ||
21 | static int ntfs_ioctl_fitrim(struct ntfs_sb_info *sbi, unsigned long arg) | |
22 | { | |
23 | struct fstrim_range __user *user_range; | |
24 | struct fstrim_range range; | |
4342306f KK |
25 | int err; |
26 | ||
27 | if (!capable(CAP_SYS_ADMIN)) | |
28 | return -EPERM; | |
29 | ||
70200574 | 30 | if (!bdev_max_discard_sectors(sbi->sb->s_bdev)) |
4342306f KK |
31 | return -EOPNOTSUPP; |
32 | ||
33 | user_range = (struct fstrim_range __user *)arg; | |
34 | if (copy_from_user(&range, user_range, sizeof(range))) | |
35 | return -EFAULT; | |
36 | ||
7b47ef52 CH |
37 | range.minlen = max_t(u32, range.minlen, |
38 | bdev_discard_granularity(sbi->sb->s_bdev)); | |
4342306f KK |
39 | |
40 | err = ntfs_trim_fs(sbi, &range); | |
41 | if (err < 0) | |
42 | return err; | |
43 | ||
44 | if (copy_to_user(user_range, &range, sizeof(range))) | |
45 | return -EFAULT; | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | static long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg) | |
51 | { | |
52 | struct inode *inode = file_inode(filp); | |
53 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; | |
4342306f KK |
54 | |
55 | switch (cmd) { | |
4342306f KK |
56 | case FITRIM: |
57 | return ntfs_ioctl_fitrim(sbi, arg); | |
58 | } | |
e8b8e97f | 59 | return -ENOTTY; /* Inappropriate ioctl for device. */ |
4342306f KK |
60 | } |
61 | ||
62 | #ifdef CONFIG_COMPAT | |
63 | static long ntfs_compat_ioctl(struct file *filp, u32 cmd, unsigned long arg) | |
64 | ||
65 | { | |
66 | return ntfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); | |
67 | } | |
68 | #endif | |
69 | ||
70 | /* | |
e8b8e97f | 71 | * ntfs_getattr - inode_operations::getattr |
4342306f KK |
72 | */ |
73 | int ntfs_getattr(struct user_namespace *mnt_userns, const struct path *path, | |
74 | struct kstat *stat, u32 request_mask, u32 flags) | |
75 | { | |
76 | struct inode *inode = d_inode(path->dentry); | |
77 | struct ntfs_inode *ni = ntfs_i(inode); | |
78 | ||
79 | if (is_compressed(ni)) | |
80 | stat->attributes |= STATX_ATTR_COMPRESSED; | |
81 | ||
82 | if (is_encrypted(ni)) | |
83 | stat->attributes |= STATX_ATTR_ENCRYPTED; | |
84 | ||
85 | stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED; | |
86 | ||
87 | generic_fillattr(mnt_userns, inode, stat); | |
88 | ||
89 | stat->result_mask |= STATX_BTIME; | |
90 | stat->btime = ni->i_crtime; | |
91 | stat->blksize = ni->mi.sbi->cluster_size; /* 512, 1K, ..., 2M */ | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static int ntfs_extend_initialized_size(struct file *file, | |
97 | struct ntfs_inode *ni, | |
98 | const loff_t valid, | |
99 | const loff_t new_valid) | |
100 | { | |
101 | struct inode *inode = &ni->vfs_inode; | |
102 | struct address_space *mapping = inode->i_mapping; | |
103 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; | |
104 | loff_t pos = valid; | |
105 | int err; | |
106 | ||
107 | if (is_resident(ni)) { | |
108 | ni->i_valid = new_valid; | |
109 | return 0; | |
110 | } | |
111 | ||
112 | WARN_ON(is_compressed(ni)); | |
113 | WARN_ON(valid >= new_valid); | |
114 | ||
115 | for (;;) { | |
116 | u32 zerofrom, len; | |
117 | struct page *page; | |
4342306f KK |
118 | u8 bits; |
119 | CLST vcn, lcn, clen; | |
120 | ||
121 | if (is_sparsed(ni)) { | |
122 | bits = sbi->cluster_bits; | |
123 | vcn = pos >> bits; | |
124 | ||
125 | err = attr_data_get_block(ni, vcn, 0, &lcn, &clen, | |
126 | NULL); | |
127 | if (err) | |
128 | goto out; | |
129 | ||
130 | if (lcn == SPARSE_LCN) { | |
131 | loff_t vbo = (loff_t)vcn << bits; | |
132 | loff_t to = vbo + ((loff_t)clen << bits); | |
133 | ||
134 | if (to <= new_valid) { | |
135 | ni->i_valid = to; | |
136 | pos = to; | |
137 | goto next; | |
138 | } | |
139 | ||
140 | if (vbo < pos) { | |
141 | pos = vbo; | |
142 | } else { | |
143 | to = (new_valid >> bits) << bits; | |
144 | if (pos < to) { | |
145 | ni->i_valid = to; | |
146 | pos = to; | |
147 | goto next; | |
148 | } | |
149 | } | |
150 | } | |
151 | } | |
152 | ||
153 | zerofrom = pos & (PAGE_SIZE - 1); | |
154 | len = PAGE_SIZE - zerofrom; | |
155 | ||
156 | if (pos + len > new_valid) | |
157 | len = new_valid - pos; | |
158 | ||
652118b8 | 159 | err = ntfs_write_begin(file, mapping, pos, len, &page, NULL); |
4342306f KK |
160 | if (err) |
161 | goto out; | |
162 | ||
163 | zero_user_segment(page, zerofrom, PAGE_SIZE); | |
164 | ||
e8b8e97f | 165 | /* This function in any case puts page. */ |
652118b8 | 166 | err = ntfs_write_end(file, mapping, pos, len, len, page, NULL); |
4342306f KK |
167 | if (err < 0) |
168 | goto out; | |
169 | pos += len; | |
170 | ||
171 | next: | |
172 | if (pos >= new_valid) | |
173 | break; | |
174 | ||
175 | balance_dirty_pages_ratelimited(mapping); | |
176 | cond_resched(); | |
177 | } | |
178 | ||
179 | return 0; | |
180 | ||
181 | out: | |
182 | ni->i_valid = valid; | |
183 | ntfs_inode_warn(inode, "failed to extend initialized size to %llx.", | |
184 | new_valid); | |
185 | return err; | |
186 | } | |
187 | ||
188 | /* | |
e8b8e97f | 189 | * ntfs_zero_range - Helper function for punch_hole. |
d3624466 KK |
190 | * |
191 | * It zeroes a range [vbo, vbo_to). | |
4342306f KK |
192 | */ |
193 | static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to) | |
194 | { | |
195 | int err = 0; | |
196 | struct address_space *mapping = inode->i_mapping; | |
197 | u32 blocksize = 1 << inode->i_blkbits; | |
198 | pgoff_t idx = vbo >> PAGE_SHIFT; | |
199 | u32 z_start = vbo & (PAGE_SIZE - 1); | |
200 | pgoff_t idx_end = (vbo_to + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
201 | loff_t page_off; | |
202 | struct buffer_head *head, *bh; | |
203 | u32 bh_next, bh_off, z_end; | |
204 | sector_t iblock; | |
205 | struct page *page; | |
206 | ||
207 | for (; idx < idx_end; idx += 1, z_start = 0) { | |
208 | page_off = (loff_t)idx << PAGE_SHIFT; | |
209 | z_end = (page_off + PAGE_SIZE) > vbo_to ? (vbo_to - page_off) | |
210 | : PAGE_SIZE; | |
211 | iblock = page_off >> inode->i_blkbits; | |
212 | ||
213 | page = find_or_create_page(mapping, idx, | |
214 | mapping_gfp_constraint(mapping, | |
215 | ~__GFP_FS)); | |
216 | if (!page) | |
217 | return -ENOMEM; | |
218 | ||
219 | if (!page_has_buffers(page)) | |
220 | create_empty_buffers(page, blocksize, 0); | |
221 | ||
222 | bh = head = page_buffers(page); | |
223 | bh_off = 0; | |
224 | do { | |
225 | bh_next = bh_off + blocksize; | |
226 | ||
227 | if (bh_next <= z_start || bh_off >= z_end) | |
228 | continue; | |
229 | ||
230 | if (!buffer_mapped(bh)) { | |
231 | ntfs_get_block(inode, iblock, bh, 0); | |
d3624466 | 232 | /* Unmapped? It's a hole - nothing to do. */ |
4342306f KK |
233 | if (!buffer_mapped(bh)) |
234 | continue; | |
235 | } | |
236 | ||
d3624466 | 237 | /* Ok, it's mapped. Make sure it's up-to-date. */ |
4342306f KK |
238 | if (PageUptodate(page)) |
239 | set_buffer_uptodate(bh); | |
240 | ||
241 | if (!buffer_uptodate(bh)) { | |
242 | lock_buffer(bh); | |
243 | bh->b_end_io = end_buffer_read_sync; | |
244 | get_bh(bh); | |
1420c4a5 | 245 | submit_bh(REQ_OP_READ, bh); |
4342306f KK |
246 | |
247 | wait_on_buffer(bh); | |
248 | if (!buffer_uptodate(bh)) { | |
249 | unlock_page(page); | |
250 | put_page(page); | |
251 | err = -EIO; | |
252 | goto out; | |
253 | } | |
254 | } | |
255 | ||
256 | mark_buffer_dirty(bh); | |
257 | ||
258 | } while (bh_off = bh_next, iblock += 1, | |
259 | head != (bh = bh->b_this_page)); | |
260 | ||
261 | zero_user_segment(page, z_start, z_end); | |
262 | ||
263 | unlock_page(page); | |
264 | put_page(page); | |
265 | cond_resched(); | |
266 | } | |
267 | out: | |
268 | mark_inode_dirty(inode); | |
269 | return err; | |
270 | } | |
271 | ||
272 | /* | |
d3624466 | 273 | * ntfs_sparse_cluster - Helper function to zero a new allocated clusters. |
4342306f | 274 | * |
4342306f KK |
275 | * NOTE: 512 <= cluster size <= 2M |
276 | */ | |
277 | void ntfs_sparse_cluster(struct inode *inode, struct page *page0, CLST vcn, | |
278 | CLST len) | |
279 | { | |
280 | struct address_space *mapping = inode->i_mapping; | |
281 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; | |
282 | u64 vbo = (u64)vcn << sbi->cluster_bits; | |
283 | u64 bytes = (u64)len << sbi->cluster_bits; | |
284 | u32 blocksize = 1 << inode->i_blkbits; | |
285 | pgoff_t idx0 = page0 ? page0->index : -1; | |
286 | loff_t vbo_clst = vbo & sbi->cluster_mask_inv; | |
287 | loff_t end = ntfs_up_cluster(sbi, vbo + bytes); | |
288 | pgoff_t idx = vbo_clst >> PAGE_SHIFT; | |
289 | u32 from = vbo_clst & (PAGE_SIZE - 1); | |
290 | pgoff_t idx_end = (end + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
291 | loff_t page_off; | |
292 | u32 to; | |
293 | bool partial; | |
294 | struct page *page; | |
295 | ||
296 | for (; idx < idx_end; idx += 1, from = 0) { | |
297 | page = idx == idx0 ? page0 : grab_cache_page(mapping, idx); | |
298 | ||
299 | if (!page) | |
300 | continue; | |
301 | ||
302 | page_off = (loff_t)idx << PAGE_SHIFT; | |
303 | to = (page_off + PAGE_SIZE) > end ? (end - page_off) | |
304 | : PAGE_SIZE; | |
305 | partial = false; | |
306 | ||
307 | if ((from || PAGE_SIZE != to) && | |
308 | likely(!page_has_buffers(page))) { | |
309 | create_empty_buffers(page, blocksize, 0); | |
310 | } | |
311 | ||
312 | if (page_has_buffers(page)) { | |
313 | struct buffer_head *head, *bh; | |
314 | u32 bh_off = 0; | |
315 | ||
316 | bh = head = page_buffers(page); | |
317 | do { | |
318 | u32 bh_next = bh_off + blocksize; | |
319 | ||
320 | if (from <= bh_off && bh_next <= to) { | |
321 | set_buffer_uptodate(bh); | |
322 | mark_buffer_dirty(bh); | |
323 | } else if (!buffer_uptodate(bh)) { | |
324 | partial = true; | |
325 | } | |
326 | bh_off = bh_next; | |
327 | } while (head != (bh = bh->b_this_page)); | |
328 | } | |
329 | ||
330 | zero_user_segment(page, from, to); | |
331 | ||
332 | if (!partial) { | |
333 | if (!PageUptodate(page)) | |
334 | SetPageUptodate(page); | |
335 | set_page_dirty(page); | |
336 | } | |
337 | ||
338 | if (idx != idx0) { | |
339 | unlock_page(page); | |
340 | put_page(page); | |
341 | } | |
342 | cond_resched(); | |
343 | } | |
344 | mark_inode_dirty(inode); | |
345 | } | |
346 | ||
347 | /* | |
e8b8e97f | 348 | * ntfs_file_mmap - file_operations::mmap |
4342306f KK |
349 | */ |
350 | static int ntfs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
351 | { | |
352 | struct address_space *mapping = file->f_mapping; | |
353 | struct inode *inode = mapping->host; | |
354 | struct ntfs_inode *ni = ntfs_i(inode); | |
355 | u64 from = ((u64)vma->vm_pgoff << PAGE_SHIFT); | |
356 | bool rw = vma->vm_flags & VM_WRITE; | |
357 | int err; | |
358 | ||
359 | if (is_encrypted(ni)) { | |
360 | ntfs_inode_warn(inode, "mmap encrypted not supported"); | |
361 | return -EOPNOTSUPP; | |
362 | } | |
363 | ||
364 | if (is_dedup(ni)) { | |
365 | ntfs_inode_warn(inode, "mmap deduplicated not supported"); | |
366 | return -EOPNOTSUPP; | |
367 | } | |
368 | ||
369 | if (is_compressed(ni) && rw) { | |
370 | ntfs_inode_warn(inode, "mmap(write) compressed not supported"); | |
371 | return -EOPNOTSUPP; | |
372 | } | |
373 | ||
374 | if (rw) { | |
375 | u64 to = min_t(loff_t, i_size_read(inode), | |
376 | from + vma->vm_end - vma->vm_start); | |
377 | ||
378 | if (is_sparsed(ni)) { | |
e8b8e97f | 379 | /* Allocate clusters for rw map. */ |
4342306f KK |
380 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; |
381 | CLST lcn, len; | |
382 | CLST vcn = from >> sbi->cluster_bits; | |
383 | CLST end = bytes_to_cluster(sbi, to); | |
384 | bool new; | |
385 | ||
386 | for (; vcn < end; vcn += len) { | |
387 | err = attr_data_get_block(ni, vcn, 1, &lcn, | |
388 | &len, &new); | |
389 | if (err) | |
390 | goto out; | |
391 | ||
392 | if (!new) | |
393 | continue; | |
394 | ntfs_sparse_cluster(inode, NULL, vcn, 1); | |
395 | } | |
396 | } | |
397 | ||
398 | if (ni->i_valid < to) { | |
399 | if (!inode_trylock(inode)) { | |
400 | err = -EAGAIN; | |
401 | goto out; | |
402 | } | |
403 | err = ntfs_extend_initialized_size(file, ni, | |
404 | ni->i_valid, to); | |
405 | inode_unlock(inode); | |
406 | if (err) | |
407 | goto out; | |
408 | } | |
409 | } | |
410 | ||
411 | err = generic_file_mmap(file, vma); | |
412 | out: | |
413 | return err; | |
414 | } | |
415 | ||
416 | static int ntfs_extend(struct inode *inode, loff_t pos, size_t count, | |
417 | struct file *file) | |
418 | { | |
419 | struct ntfs_inode *ni = ntfs_i(inode); | |
420 | struct address_space *mapping = inode->i_mapping; | |
421 | loff_t end = pos + count; | |
422 | bool extend_init = file && pos > ni->i_valid; | |
423 | int err; | |
424 | ||
425 | if (end <= inode->i_size && !extend_init) | |
426 | return 0; | |
427 | ||
e8b8e97f | 428 | /* Mark rw ntfs as dirty. It will be cleared at umount. */ |
4342306f KK |
429 | ntfs_set_state(ni->mi.sbi, NTFS_DIRTY_DIRTY); |
430 | ||
431 | if (end > inode->i_size) { | |
432 | err = ntfs_set_size(inode, end); | |
433 | if (err) | |
434 | goto out; | |
435 | inode->i_size = end; | |
436 | } | |
437 | ||
438 | if (extend_init && !is_compressed(ni)) { | |
439 | err = ntfs_extend_initialized_size(file, ni, ni->i_valid, pos); | |
440 | if (err) | |
441 | goto out; | |
442 | } else { | |
443 | err = 0; | |
444 | } | |
445 | ||
446 | inode->i_ctime = inode->i_mtime = current_time(inode); | |
447 | mark_inode_dirty(inode); | |
448 | ||
449 | if (IS_SYNC(inode)) { | |
450 | int err2; | |
451 | ||
452 | err = filemap_fdatawrite_range(mapping, pos, end - 1); | |
453 | err2 = sync_mapping_buffers(mapping); | |
454 | if (!err) | |
455 | err = err2; | |
456 | err2 = write_inode_now(inode, 1); | |
457 | if (!err) | |
458 | err = err2; | |
459 | if (!err) | |
460 | err = filemap_fdatawait_range(mapping, pos, end - 1); | |
461 | } | |
462 | ||
463 | out: | |
464 | return err; | |
465 | } | |
466 | ||
467 | static int ntfs_truncate(struct inode *inode, loff_t new_size) | |
468 | { | |
469 | struct super_block *sb = inode->i_sb; | |
470 | struct ntfs_inode *ni = ntfs_i(inode); | |
471 | int err, dirty = 0; | |
472 | u64 new_valid; | |
473 | ||
474 | if (!S_ISREG(inode->i_mode)) | |
475 | return 0; | |
476 | ||
477 | if (is_compressed(ni)) { | |
478 | if (ni->i_valid > new_size) | |
479 | ni->i_valid = new_size; | |
480 | } else { | |
481 | err = block_truncate_page(inode->i_mapping, new_size, | |
482 | ntfs_get_block); | |
483 | if (err) | |
484 | return err; | |
485 | } | |
486 | ||
487 | new_valid = ntfs_up_block(sb, min_t(u64, ni->i_valid, new_size)); | |
488 | ||
489 | ni_lock(ni); | |
490 | ||
491 | truncate_setsize(inode, new_size); | |
492 | ||
493 | down_write(&ni->file.run_lock); | |
494 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size, | |
e95113ed | 495 | &new_valid, ni->mi.sbi->options->prealloc, NULL); |
4342306f KK |
496 | up_write(&ni->file.run_lock); |
497 | ||
498 | if (new_valid < ni->i_valid) | |
499 | ni->i_valid = new_valid; | |
500 | ||
501 | ni_unlock(ni); | |
502 | ||
503 | ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE; | |
504 | inode->i_ctime = inode->i_mtime = current_time(inode); | |
505 | if (!IS_DIRSYNC(inode)) { | |
506 | dirty = 1; | |
507 | } else { | |
508 | err = ntfs_sync_inode(inode); | |
509 | if (err) | |
510 | return err; | |
511 | } | |
512 | ||
513 | if (dirty) | |
514 | mark_inode_dirty(inode); | |
515 | ||
516 | /*ntfs_flush_inodes(inode->i_sb, inode, NULL);*/ | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | /* | |
e8b8e97f KA |
522 | * ntfs_fallocate |
523 | * | |
4342306f KK |
524 | * Preallocate space for a file. This implements ntfs's fallocate file |
525 | * operation, which gets called from sys_fallocate system call. User | |
526 | * space requests 'len' bytes at 'vbo'. If FALLOC_FL_KEEP_SIZE is set | |
527 | * we just allocate clusters without zeroing them out. Otherwise we | |
528 | * allocate and zero out clusters via an expanding truncate. | |
529 | */ | |
530 | static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len) | |
531 | { | |
532 | struct inode *inode = file->f_mapping->host; | |
e4d2f4fd | 533 | struct address_space *mapping = inode->i_mapping; |
4342306f KK |
534 | struct super_block *sb = inode->i_sb; |
535 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
536 | struct ntfs_inode *ni = ntfs_i(inode); | |
537 | loff_t end = vbo + len; | |
538 | loff_t vbo_down = round_down(vbo, PAGE_SIZE); | |
e4d2f4fd KK |
539 | bool is_supported_holes = is_sparsed(ni) || is_compressed(ni); |
540 | loff_t i_size, new_size; | |
541 | bool map_locked; | |
4342306f KK |
542 | int err; |
543 | ||
e8b8e97f | 544 | /* No support for dir. */ |
4342306f KK |
545 | if (!S_ISREG(inode->i_mode)) |
546 | return -EOPNOTSUPP; | |
547 | ||
e4d2f4fd KK |
548 | /* |
549 | * vfs_fallocate checks all possible combinations of mode. | |
550 | * Do additional checks here before ntfs_set_state(dirty). | |
551 | */ | |
552 | if (mode & FALLOC_FL_PUNCH_HOLE) { | |
553 | if (!is_supported_holes) | |
554 | return -EOPNOTSUPP; | |
555 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { | |
556 | } else if (mode & FALLOC_FL_INSERT_RANGE) { | |
557 | if (!is_supported_holes) | |
558 | return -EOPNOTSUPP; | |
559 | } else if (mode & | |
560 | ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | | |
561 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)) { | |
4342306f KK |
562 | ntfs_inode_warn(inode, "fallocate(0x%x) is not supported", |
563 | mode); | |
564 | return -EOPNOTSUPP; | |
565 | } | |
566 | ||
567 | ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); | |
568 | ||
569 | inode_lock(inode); | |
570 | i_size = inode->i_size; | |
e4d2f4fd KK |
571 | new_size = max(end, i_size); |
572 | map_locked = false; | |
4342306f KK |
573 | |
574 | if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { | |
e8b8e97f | 575 | /* Should never be here, see ntfs_file_open. */ |
4342306f KK |
576 | err = -EOPNOTSUPP; |
577 | goto out; | |
578 | } | |
579 | ||
e4d2f4fd KK |
580 | if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE | |
581 | FALLOC_FL_INSERT_RANGE)) { | |
582 | inode_dio_wait(inode); | |
583 | filemap_invalidate_lock(mapping); | |
584 | map_locked = true; | |
585 | } | |
586 | ||
4342306f KK |
587 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
588 | u32 frame_size; | |
589 | loff_t mask, vbo_a, end_a, tmp; | |
590 | ||
e4d2f4fd | 591 | err = filemap_write_and_wait_range(mapping, vbo, end - 1); |
4342306f KK |
592 | if (err) |
593 | goto out; | |
594 | ||
e4d2f4fd | 595 | err = filemap_write_and_wait_range(mapping, end, LLONG_MAX); |
4342306f KK |
596 | if (err) |
597 | goto out; | |
598 | ||
4342306f KK |
599 | truncate_pagecache(inode, vbo_down); |
600 | ||
4342306f KK |
601 | ni_lock(ni); |
602 | err = attr_punch_hole(ni, vbo, len, &frame_size); | |
603 | ni_unlock(ni); | |
604 | if (err != E_NTFS_NOTALIGNED) | |
605 | goto out; | |
606 | ||
d3624466 | 607 | /* Process not aligned punch. */ |
4342306f KK |
608 | mask = frame_size - 1; |
609 | vbo_a = (vbo + mask) & ~mask; | |
610 | end_a = end & ~mask; | |
611 | ||
612 | tmp = min(vbo_a, end); | |
613 | if (tmp > vbo) { | |
614 | err = ntfs_zero_range(inode, vbo, tmp); | |
615 | if (err) | |
616 | goto out; | |
617 | } | |
618 | ||
619 | if (vbo < end_a && end_a < end) { | |
620 | err = ntfs_zero_range(inode, end_a, end); | |
621 | if (err) | |
622 | goto out; | |
623 | } | |
624 | ||
625 | /* Aligned punch_hole */ | |
626 | if (end_a > vbo_a) { | |
627 | ni_lock(ni); | |
628 | err = attr_punch_hole(ni, vbo_a, end_a - vbo_a, NULL); | |
629 | ni_unlock(ni); | |
630 | } | |
631 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { | |
4342306f KK |
632 | /* |
633 | * Write tail of the last page before removed range since | |
634 | * it will get removed from the page cache below. | |
635 | */ | |
e4d2f4fd | 636 | err = filemap_write_and_wait_range(mapping, vbo_down, vbo); |
4342306f KK |
637 | if (err) |
638 | goto out; | |
639 | ||
640 | /* | |
641 | * Write data that will be shifted to preserve them | |
e8b8e97f | 642 | * when discarding page cache below. |
4342306f | 643 | */ |
e4d2f4fd | 644 | err = filemap_write_and_wait_range(mapping, end, LLONG_MAX); |
4342306f KK |
645 | if (err) |
646 | goto out; | |
647 | ||
4342306f KK |
648 | truncate_pagecache(inode, vbo_down); |
649 | ||
650 | ni_lock(ni); | |
651 | err = attr_collapse_range(ni, vbo, len); | |
652 | ni_unlock(ni); | |
e4d2f4fd KK |
653 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
654 | /* Check new size. */ | |
655 | err = inode_newsize_ok(inode, new_size); | |
656 | if (err) | |
657 | goto out; | |
658 | ||
659 | /* Write out all dirty pages. */ | |
660 | err = filemap_write_and_wait_range(mapping, vbo_down, | |
661 | LLONG_MAX); | |
662 | if (err) | |
663 | goto out; | |
664 | truncate_pagecache(inode, vbo_down); | |
11434697 | 665 | |
e4d2f4fd KK |
666 | ni_lock(ni); |
667 | err = attr_insert_range(ni, vbo, len); | |
668 | ni_unlock(ni); | |
4342306f | 669 | } else { |
e4d2f4fd | 670 | /* Check new size. */ |
b3e04872 KK |
671 | |
672 | /* generic/213: expected -ENOSPC instead of -EFBIG. */ | |
673 | if (!is_supported_holes) { | |
674 | loff_t to_alloc = new_size - inode_get_bytes(inode); | |
675 | ||
676 | if (to_alloc > 0 && | |
677 | (to_alloc >> sbi->cluster_bits) > | |
678 | wnd_zeroes(&sbi->used.bitmap)) { | |
679 | err = -ENOSPC; | |
680 | goto out; | |
681 | } | |
682 | } | |
11434697 KK |
683 | |
684 | err = inode_newsize_ok(inode, new_size); | |
685 | if (err) | |
686 | goto out; | |
687 | ||
e4d2f4fd KK |
688 | /* |
689 | * Allocate clusters, do not change 'valid' size. | |
690 | */ | |
11434697 | 691 | err = ntfs_set_size(inode, new_size); |
4342306f KK |
692 | if (err) |
693 | goto out; | |
694 | ||
e4d2f4fd | 695 | if (is_supported_holes) { |
4342306f KK |
696 | CLST vcn_v = ni->i_valid >> sbi->cluster_bits; |
697 | CLST vcn = vbo >> sbi->cluster_bits; | |
698 | CLST cend = bytes_to_cluster(sbi, end); | |
699 | CLST lcn, clen; | |
700 | bool new; | |
701 | ||
702 | /* | |
e8b8e97f KA |
703 | * Allocate but do not zero new clusters. (see below comments) |
704 | * This breaks security: One can read unused on-disk areas. | |
705 | * Zeroing these clusters may be too long. | |
706 | * Maybe we should check here for root rights? | |
4342306f KK |
707 | */ |
708 | for (; vcn < cend; vcn += clen) { | |
709 | err = attr_data_get_block(ni, vcn, cend - vcn, | |
710 | &lcn, &clen, &new); | |
711 | if (err) | |
712 | goto out; | |
713 | if (!new || vcn >= vcn_v) | |
714 | continue; | |
715 | ||
716 | /* | |
e8b8e97f KA |
717 | * Unwritten area. |
718 | * NTFS is not able to store several unwritten areas. | |
719 | * Activate 'ntfs_sparse_cluster' to zero new allocated clusters. | |
4342306f KK |
720 | * |
721 | * Dangerous in case: | |
722 | * 1G of sparsed clusters + 1 cluster of data => | |
723 | * valid_size == 1G + 1 cluster | |
724 | * fallocate(1G) will zero 1G and this can be very long | |
e8b8e97f | 725 | * xfstest 016/086 will fail without 'ntfs_sparse_cluster'. |
4342306f KK |
726 | */ |
727 | ntfs_sparse_cluster(inode, NULL, vcn, | |
728 | min(vcn_v - vcn, clen)); | |
729 | } | |
730 | } | |
731 | ||
732 | if (mode & FALLOC_FL_KEEP_SIZE) { | |
733 | ni_lock(ni); | |
e8b8e97f | 734 | /* True - Keep preallocated. */ |
4342306f KK |
735 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, |
736 | &ni->file.run, i_size, &ni->i_valid, | |
737 | true, NULL); | |
738 | ni_unlock(ni); | |
739 | } | |
740 | } | |
741 | ||
742 | out: | |
e4d2f4fd KK |
743 | if (map_locked) |
744 | filemap_invalidate_unlock(mapping); | |
4342306f KK |
745 | |
746 | if (!err) { | |
747 | inode->i_ctime = inode->i_mtime = current_time(inode); | |
748 | mark_inode_dirty(inode); | |
749 | } | |
750 | ||
751 | inode_unlock(inode); | |
752 | return err; | |
753 | } | |
754 | ||
755 | /* | |
e8b8e97f | 756 | * ntfs3_setattr - inode_operations::setattr |
4342306f KK |
757 | */ |
758 | int ntfs3_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, | |
759 | struct iattr *attr) | |
760 | { | |
761 | struct super_block *sb = dentry->d_sb; | |
762 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
763 | struct inode *inode = d_inode(dentry); | |
764 | struct ntfs_inode *ni = ntfs_i(inode); | |
765 | u32 ia_valid = attr->ia_valid; | |
766 | umode_t mode = inode->i_mode; | |
767 | int err; | |
768 | ||
28a941ff | 769 | if (sbi->options->noacsrules) { |
e8b8e97f | 770 | /* "No access rules" - Force any changes of time etc. */ |
4342306f | 771 | attr->ia_valid |= ATTR_FORCE; |
e8b8e97f | 772 | /* and disable for editing some attributes. */ |
4342306f KK |
773 | attr->ia_valid &= ~(ATTR_UID | ATTR_GID | ATTR_MODE); |
774 | ia_valid = attr->ia_valid; | |
775 | } | |
776 | ||
777 | err = setattr_prepare(mnt_userns, dentry, attr); | |
778 | if (err) | |
779 | goto out; | |
780 | ||
781 | if (ia_valid & ATTR_SIZE) { | |
782 | loff_t oldsize = inode->i_size; | |
783 | ||
784 | if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { | |
e8b8e97f | 785 | /* Should never be here, see ntfs_file_open(). */ |
4342306f KK |
786 | err = -EOPNOTSUPP; |
787 | goto out; | |
788 | } | |
789 | inode_dio_wait(inode); | |
790 | ||
3880f2b8 | 791 | if (attr->ia_size <= oldsize) |
4342306f KK |
792 | err = ntfs_truncate(inode, attr->ia_size); |
793 | else if (attr->ia_size > oldsize) | |
794 | err = ntfs_extend(inode, attr->ia_size, 0, NULL); | |
795 | ||
796 | if (err) | |
797 | goto out; | |
798 | ||
799 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; | |
800 | } | |
801 | ||
802 | setattr_copy(mnt_userns, inode, attr); | |
803 | ||
804 | if (mode != inode->i_mode) { | |
805 | err = ntfs_acl_chmod(mnt_userns, inode); | |
806 | if (err) | |
807 | goto out; | |
808 | ||
e8b8e97f | 809 | /* Linux 'w' -> Windows 'ro'. */ |
4342306f KK |
810 | if (0222 & inode->i_mode) |
811 | ni->std_fa &= ~FILE_ATTRIBUTE_READONLY; | |
812 | else | |
813 | ni->std_fa |= FILE_ATTRIBUTE_READONLY; | |
814 | } | |
815 | ||
816 | if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) | |
817 | ntfs_save_wsl_perm(inode); | |
818 | mark_inode_dirty(inode); | |
819 | out: | |
820 | return err; | |
821 | } | |
822 | ||
823 | static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter) | |
824 | { | |
4342306f KK |
825 | struct file *file = iocb->ki_filp; |
826 | struct inode *inode = file->f_mapping->host; | |
827 | struct ntfs_inode *ni = ntfs_i(inode); | |
828 | ||
829 | if (is_encrypted(ni)) { | |
830 | ntfs_inode_warn(inode, "encrypted i/o not supported"); | |
831 | return -EOPNOTSUPP; | |
832 | } | |
833 | ||
834 | if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) { | |
835 | ntfs_inode_warn(inode, "direct i/o + compressed not supported"); | |
836 | return -EOPNOTSUPP; | |
837 | } | |
838 | ||
839 | #ifndef CONFIG_NTFS3_LZX_XPRESS | |
840 | if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) { | |
841 | ntfs_inode_warn( | |
842 | inode, | |
843 | "activate CONFIG_NTFS3_LZX_XPRESS to read external compressed files"); | |
844 | return -EOPNOTSUPP; | |
845 | } | |
846 | #endif | |
847 | ||
848 | if (is_dedup(ni)) { | |
849 | ntfs_inode_warn(inode, "read deduplicated not supported"); | |
850 | return -EOPNOTSUPP; | |
851 | } | |
852 | ||
dd854e4b | 853 | return generic_file_read_iter(iocb, iter); |
4342306f KK |
854 | } |
855 | ||
e8b8e97f KA |
856 | /* |
857 | * ntfs_get_frame_pages | |
858 | * | |
859 | * Return: Array of locked pages. | |
860 | */ | |
4342306f KK |
861 | static int ntfs_get_frame_pages(struct address_space *mapping, pgoff_t index, |
862 | struct page **pages, u32 pages_per_frame, | |
863 | bool *frame_uptodate) | |
864 | { | |
865 | gfp_t gfp_mask = mapping_gfp_mask(mapping); | |
866 | u32 npages; | |
867 | ||
868 | *frame_uptodate = true; | |
869 | ||
870 | for (npages = 0; npages < pages_per_frame; npages++, index++) { | |
871 | struct page *page; | |
872 | ||
873 | page = find_or_create_page(mapping, index, gfp_mask); | |
874 | if (!page) { | |
875 | while (npages--) { | |
876 | page = pages[npages]; | |
877 | unlock_page(page); | |
878 | put_page(page); | |
879 | } | |
880 | ||
881 | return -ENOMEM; | |
882 | } | |
883 | ||
884 | if (!PageUptodate(page)) | |
885 | *frame_uptodate = false; | |
886 | ||
887 | pages[npages] = page; | |
888 | } | |
889 | ||
890 | return 0; | |
891 | } | |
892 | ||
e8b8e97f KA |
893 | /* |
894 | * ntfs_compress_write - Helper for ntfs_file_write_iter() (compressed files). | |
895 | */ | |
4342306f KK |
896 | static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from) |
897 | { | |
898 | int err; | |
899 | struct file *file = iocb->ki_filp; | |
900 | size_t count = iov_iter_count(from); | |
901 | loff_t pos = iocb->ki_pos; | |
902 | struct inode *inode = file_inode(file); | |
903 | loff_t i_size = inode->i_size; | |
904 | struct address_space *mapping = inode->i_mapping; | |
905 | struct ntfs_inode *ni = ntfs_i(inode); | |
906 | u64 valid = ni->i_valid; | |
907 | struct ntfs_sb_info *sbi = ni->mi.sbi; | |
908 | struct page *page, **pages = NULL; | |
909 | size_t written = 0; | |
910 | u8 frame_bits = NTFS_LZNT_CUNIT + sbi->cluster_bits; | |
911 | u32 frame_size = 1u << frame_bits; | |
912 | u32 pages_per_frame = frame_size >> PAGE_SHIFT; | |
913 | u32 ip, off; | |
914 | CLST frame; | |
915 | u64 frame_vbo; | |
916 | pgoff_t index; | |
917 | bool frame_uptodate; | |
918 | ||
919 | if (frame_size < PAGE_SIZE) { | |
920 | /* | |
921 | * frame_size == 8K if cluster 512 | |
922 | * frame_size == 64K if cluster 4096 | |
923 | */ | |
924 | ntfs_inode_warn(inode, "page size is bigger than frame size"); | |
925 | return -EOPNOTSUPP; | |
926 | } | |
927 | ||
345482bc | 928 | pages = kmalloc_array(pages_per_frame, sizeof(struct page *), GFP_NOFS); |
4342306f KK |
929 | if (!pages) |
930 | return -ENOMEM; | |
931 | ||
932 | current->backing_dev_info = inode_to_bdi(inode); | |
933 | err = file_remove_privs(file); | |
934 | if (err) | |
935 | goto out; | |
936 | ||
937 | err = file_update_time(file); | |
938 | if (err) | |
939 | goto out; | |
940 | ||
e8b8e97f | 941 | /* Zero range [valid : pos). */ |
4342306f KK |
942 | while (valid < pos) { |
943 | CLST lcn, clen; | |
944 | ||
945 | frame = valid >> frame_bits; | |
946 | frame_vbo = valid & ~(frame_size - 1); | |
947 | off = valid & (frame_size - 1); | |
948 | ||
949 | err = attr_data_get_block(ni, frame << NTFS_LZNT_CUNIT, 0, &lcn, | |
950 | &clen, NULL); | |
951 | if (err) | |
952 | goto out; | |
953 | ||
954 | if (lcn == SPARSE_LCN) { | |
955 | ni->i_valid = valid = | |
956 | frame_vbo + ((u64)clen << sbi->cluster_bits); | |
957 | continue; | |
958 | } | |
959 | ||
e8b8e97f | 960 | /* Load full frame. */ |
4342306f KK |
961 | err = ntfs_get_frame_pages(mapping, frame_vbo >> PAGE_SHIFT, |
962 | pages, pages_per_frame, | |
963 | &frame_uptodate); | |
964 | if (err) | |
965 | goto out; | |
966 | ||
967 | if (!frame_uptodate && off) { | |
968 | err = ni_read_frame(ni, frame_vbo, pages, | |
969 | pages_per_frame); | |
970 | if (err) { | |
971 | for (ip = 0; ip < pages_per_frame; ip++) { | |
972 | page = pages[ip]; | |
973 | unlock_page(page); | |
974 | put_page(page); | |
975 | } | |
976 | goto out; | |
977 | } | |
978 | } | |
979 | ||
980 | ip = off >> PAGE_SHIFT; | |
981 | off = offset_in_page(valid); | |
982 | for (; ip < pages_per_frame; ip++, off = 0) { | |
983 | page = pages[ip]; | |
984 | zero_user_segment(page, off, PAGE_SIZE); | |
985 | flush_dcache_page(page); | |
986 | SetPageUptodate(page); | |
987 | } | |
988 | ||
989 | ni_lock(ni); | |
990 | err = ni_write_frame(ni, pages, pages_per_frame); | |
991 | ni_unlock(ni); | |
992 | ||
993 | for (ip = 0; ip < pages_per_frame; ip++) { | |
994 | page = pages[ip]; | |
995 | SetPageUptodate(page); | |
996 | unlock_page(page); | |
997 | put_page(page); | |
998 | } | |
999 | ||
1000 | if (err) | |
1001 | goto out; | |
1002 | ||
1003 | ni->i_valid = valid = frame_vbo + frame_size; | |
1004 | } | |
1005 | ||
e8b8e97f | 1006 | /* Copy user data [pos : pos + count). */ |
4342306f KK |
1007 | while (count) { |
1008 | size_t copied, bytes; | |
1009 | ||
1010 | off = pos & (frame_size - 1); | |
1011 | bytes = frame_size - off; | |
1012 | if (bytes > count) | |
1013 | bytes = count; | |
1014 | ||
4342306f KK |
1015 | frame_vbo = pos & ~(frame_size - 1); |
1016 | index = frame_vbo >> PAGE_SHIFT; | |
1017 | ||
a6294593 | 1018 | if (unlikely(fault_in_iov_iter_readable(from, bytes))) { |
4342306f KK |
1019 | err = -EFAULT; |
1020 | goto out; | |
1021 | } | |
1022 | ||
e8b8e97f | 1023 | /* Load full frame. */ |
4342306f KK |
1024 | err = ntfs_get_frame_pages(mapping, index, pages, |
1025 | pages_per_frame, &frame_uptodate); | |
1026 | if (err) | |
1027 | goto out; | |
1028 | ||
1029 | if (!frame_uptodate) { | |
1030 | loff_t to = pos + bytes; | |
1031 | ||
1032 | if (off || (to < i_size && (to & (frame_size - 1)))) { | |
1033 | err = ni_read_frame(ni, frame_vbo, pages, | |
1034 | pages_per_frame); | |
1035 | if (err) { | |
1036 | for (ip = 0; ip < pages_per_frame; | |
1037 | ip++) { | |
1038 | page = pages[ip]; | |
1039 | unlock_page(page); | |
1040 | put_page(page); | |
1041 | } | |
1042 | goto out; | |
1043 | } | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | WARN_ON(!bytes); | |
1048 | copied = 0; | |
1049 | ip = off >> PAGE_SHIFT; | |
1050 | off = offset_in_page(pos); | |
1051 | ||
e8b8e97f | 1052 | /* Copy user data to pages. */ |
4342306f KK |
1053 | for (;;) { |
1054 | size_t cp, tail = PAGE_SIZE - off; | |
1055 | ||
1056 | page = pages[ip]; | |
1057 | cp = copy_page_from_iter_atomic(page, off, | |
1058 | min(tail, bytes), from); | |
1059 | flush_dcache_page(page); | |
1060 | ||
1061 | copied += cp; | |
1062 | bytes -= cp; | |
1063 | if (!bytes || !cp) | |
1064 | break; | |
1065 | ||
1066 | if (cp < tail) { | |
1067 | off += cp; | |
1068 | } else { | |
1069 | ip++; | |
1070 | off = 0; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | ni_lock(ni); | |
1075 | err = ni_write_frame(ni, pages, pages_per_frame); | |
1076 | ni_unlock(ni); | |
1077 | ||
1078 | for (ip = 0; ip < pages_per_frame; ip++) { | |
1079 | page = pages[ip]; | |
1080 | ClearPageDirty(page); | |
1081 | SetPageUptodate(page); | |
1082 | unlock_page(page); | |
1083 | put_page(page); | |
1084 | } | |
1085 | ||
1086 | if (err) | |
1087 | goto out; | |
1088 | ||
1089 | /* | |
1090 | * We can loop for a long time in here. Be nice and allow | |
1091 | * us to schedule out to avoid softlocking if preempt | |
1092 | * is disabled. | |
1093 | */ | |
1094 | cond_resched(); | |
1095 | ||
1096 | pos += copied; | |
1097 | written += copied; | |
1098 | ||
1099 | count = iov_iter_count(from); | |
1100 | } | |
1101 | ||
1102 | out: | |
195c52bd | 1103 | kfree(pages); |
4342306f KK |
1104 | |
1105 | current->backing_dev_info = NULL; | |
1106 | ||
1107 | if (err < 0) | |
1108 | return err; | |
1109 | ||
1110 | iocb->ki_pos += written; | |
1111 | if (iocb->ki_pos > ni->i_valid) | |
1112 | ni->i_valid = iocb->ki_pos; | |
1113 | ||
1114 | return written; | |
1115 | } | |
1116 | ||
1117 | /* | |
e8b8e97f | 1118 | * ntfs_file_write_iter - file_operations::write_iter |
4342306f KK |
1119 | */ |
1120 | static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) | |
1121 | { | |
1122 | struct file *file = iocb->ki_filp; | |
1123 | struct address_space *mapping = file->f_mapping; | |
1124 | struct inode *inode = mapping->host; | |
1125 | ssize_t ret; | |
1126 | struct ntfs_inode *ni = ntfs_i(inode); | |
1127 | ||
1128 | if (is_encrypted(ni)) { | |
1129 | ntfs_inode_warn(inode, "encrypted i/o not supported"); | |
1130 | return -EOPNOTSUPP; | |
1131 | } | |
1132 | ||
1133 | if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) { | |
1134 | ntfs_inode_warn(inode, "direct i/o + compressed not supported"); | |
1135 | return -EOPNOTSUPP; | |
1136 | } | |
1137 | ||
1138 | if (is_dedup(ni)) { | |
1139 | ntfs_inode_warn(inode, "write into deduplicated not supported"); | |
1140 | return -EOPNOTSUPP; | |
1141 | } | |
1142 | ||
1143 | if (!inode_trylock(inode)) { | |
1144 | if (iocb->ki_flags & IOCB_NOWAIT) | |
1145 | return -EAGAIN; | |
1146 | inode_lock(inode); | |
1147 | } | |
1148 | ||
1149 | ret = generic_write_checks(iocb, from); | |
1150 | if (ret <= 0) | |
1151 | goto out; | |
1152 | ||
1153 | if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { | |
d3624466 | 1154 | /* Should never be here, see ntfs_file_open(). */ |
4342306f KK |
1155 | ret = -EOPNOTSUPP; |
1156 | goto out; | |
1157 | } | |
1158 | ||
1159 | ret = ntfs_extend(inode, iocb->ki_pos, ret, file); | |
1160 | if (ret) | |
1161 | goto out; | |
1162 | ||
1163 | ret = is_compressed(ni) ? ntfs_compress_write(iocb, from) | |
1164 | : __generic_file_write_iter(iocb, from); | |
1165 | ||
1166 | out: | |
1167 | inode_unlock(inode); | |
1168 | ||
1169 | if (ret > 0) | |
1170 | ret = generic_write_sync(iocb, ret); | |
1171 | ||
1172 | return ret; | |
1173 | } | |
1174 | ||
1175 | /* | |
e8b8e97f | 1176 | * ntfs_file_open - file_operations::open |
4342306f KK |
1177 | */ |
1178 | int ntfs_file_open(struct inode *inode, struct file *file) | |
1179 | { | |
1180 | struct ntfs_inode *ni = ntfs_i(inode); | |
1181 | ||
1182 | if (unlikely((is_compressed(ni) || is_encrypted(ni)) && | |
1183 | (file->f_flags & O_DIRECT))) { | |
1184 | return -EOPNOTSUPP; | |
1185 | } | |
1186 | ||
e8b8e97f | 1187 | /* Decompress "external compressed" file if opened for rw. */ |
4342306f KK |
1188 | if ((ni->ni_flags & NI_FLAG_COMPRESSED_MASK) && |
1189 | (file->f_flags & (O_WRONLY | O_RDWR | O_TRUNC))) { | |
1190 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
1191 | int err = ni_decompress_file(ni); | |
1192 | ||
1193 | if (err) | |
1194 | return err; | |
1195 | #else | |
1196 | ntfs_inode_warn( | |
1197 | inode, | |
1198 | "activate CONFIG_NTFS3_LZX_XPRESS to write external compressed files"); | |
1199 | return -EOPNOTSUPP; | |
1200 | #endif | |
1201 | } | |
1202 | ||
1203 | return generic_file_open(inode, file); | |
1204 | } | |
1205 | ||
1206 | /* | |
e8b8e97f | 1207 | * ntfs_file_release - file_operations::release |
4342306f KK |
1208 | */ |
1209 | static int ntfs_file_release(struct inode *inode, struct file *file) | |
1210 | { | |
1211 | struct ntfs_inode *ni = ntfs_i(inode); | |
1212 | struct ntfs_sb_info *sbi = ni->mi.sbi; | |
1213 | int err = 0; | |
1214 | ||
e8b8e97f | 1215 | /* If we are last writer on the inode, drop the block reservation. */ |
564c97bd | 1216 | if (sbi->options->prealloc && ((file->f_mode & FMODE_WRITE) && |
4342306f KK |
1217 | atomic_read(&inode->i_writecount) == 1)) { |
1218 | ni_lock(ni); | |
1219 | down_write(&ni->file.run_lock); | |
1220 | ||
1221 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, | |
1222 | inode->i_size, &ni->i_valid, false, NULL); | |
1223 | ||
1224 | up_write(&ni->file.run_lock); | |
1225 | ni_unlock(ni); | |
1226 | } | |
1227 | return err; | |
1228 | } | |
1229 | ||
e8b8e97f KA |
1230 | /* |
1231 | * ntfs_fiemap - file_operations::fiemap | |
1232 | */ | |
4342306f KK |
1233 | int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1234 | __u64 start, __u64 len) | |
1235 | { | |
1236 | int err; | |
1237 | struct ntfs_inode *ni = ntfs_i(inode); | |
1238 | ||
d4e8e135 KA |
1239 | err = fiemap_prep(inode, fieinfo, start, &len, ~FIEMAP_FLAG_XATTR); |
1240 | if (err) | |
1241 | return err; | |
4342306f KK |
1242 | |
1243 | ni_lock(ni); | |
1244 | ||
1245 | err = ni_fiemap(ni, fieinfo, start, len); | |
1246 | ||
1247 | ni_unlock(ni); | |
1248 | ||
1249 | return err; | |
1250 | } | |
1251 | ||
1252 | // clang-format off | |
1253 | const struct inode_operations ntfs_file_inode_operations = { | |
1254 | .getattr = ntfs_getattr, | |
1255 | .setattr = ntfs3_setattr, | |
1256 | .listxattr = ntfs_listxattr, | |
1257 | .permission = ntfs_permission, | |
1258 | .get_acl = ntfs_get_acl, | |
1259 | .set_acl = ntfs_set_acl, | |
1260 | .fiemap = ntfs_fiemap, | |
1261 | }; | |
1262 | ||
1263 | const struct file_operations ntfs_file_operations = { | |
1264 | .llseek = generic_file_llseek, | |
1265 | .read_iter = ntfs_file_read_iter, | |
1266 | .write_iter = ntfs_file_write_iter, | |
1267 | .unlocked_ioctl = ntfs_ioctl, | |
1268 | #ifdef CONFIG_COMPAT | |
1269 | .compat_ioctl = ntfs_compat_ioctl, | |
1270 | #endif | |
1271 | .splice_read = generic_file_splice_read, | |
1272 | .mmap = ntfs_file_mmap, | |
1273 | .open = ntfs_file_open, | |
1274 | .fsync = generic_file_fsync, | |
1275 | .splice_write = iter_file_splice_write, | |
1276 | .fallocate = ntfs_fallocate, | |
1277 | .release = ntfs_file_release, | |
1278 | }; | |
1279 | // clang-format on |