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