1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * |
4 | * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. |
5 | * |
6 | * Regular file handling primitives for NTFS-based filesystems. |
7 | * |
8 | */ |
9 | |
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> |
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 block_device *dev; |
26 | int err; |
27 | |
28 | if (!capable(CAP_SYS_ADMIN)) |
29 | return -EPERM; |
30 | |
31 | dev = sbi->sb->s_bdev; |
32 | if (!bdev_max_discard_sectors(bdev: dev)) |
33 | return -EOPNOTSUPP; |
34 | |
35 | user_range = (struct fstrim_range __user *)arg; |
36 | if (copy_from_user(to: &range, from: user_range, n: sizeof(range))) |
37 | return -EFAULT; |
38 | |
39 | range.minlen = max_t(u32, range.minlen, bdev_discard_granularity(dev)); |
40 | |
41 | err = ntfs_trim_fs(sbi, range: &range); |
42 | if (err < 0) |
43 | return err; |
44 | |
45 | if (copy_to_user(to: user_range, from: &range, n: sizeof(range))) |
46 | return -EFAULT; |
47 | |
48 | return 0; |
49 | } |
50 | |
51 | long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg) |
52 | { |
53 | struct inode *inode = file_inode(f: filp); |
54 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; |
55 | |
56 | switch (cmd) { |
57 | case FITRIM: |
58 | return ntfs_ioctl_fitrim(sbi, arg); |
59 | } |
60 | return -ENOTTY; /* Inappropriate ioctl for device. */ |
61 | } |
62 | |
63 | #ifdef CONFIG_COMPAT |
64 | long ntfs_compat_ioctl(struct file *filp, u32 cmd, unsigned long arg) |
65 | |
66 | { |
67 | return ntfs_ioctl(filp, cmd, arg: (unsigned long)compat_ptr(uptr: arg)); |
68 | } |
69 | #endif |
70 | |
71 | /* |
72 | * ntfs_getattr - inode_operations::getattr |
73 | */ |
74 | int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path, |
75 | struct kstat *stat, u32 request_mask, u32 flags) |
76 | { |
77 | struct inode *inode = d_inode(dentry: path->dentry); |
78 | struct ntfs_inode *ni = ntfs_i(inode); |
79 | |
80 | if (is_compressed(ni)) |
81 | stat->attributes |= STATX_ATTR_COMPRESSED; |
82 | |
83 | if (is_encrypted(ni)) |
84 | stat->attributes |= STATX_ATTR_ENCRYPTED; |
85 | |
86 | stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED; |
87 | |
88 | generic_fillattr(idmap, request_mask, inode, stat); |
89 | |
90 | stat->result_mask |= STATX_BTIME; |
91 | stat->btime = ni->i_crtime; |
92 | stat->blksize = ni->mi.sbi->cluster_size; /* 512, 1K, ..., 2M */ |
93 | |
94 | return 0; |
95 | } |
96 | |
97 | static int ntfs_extend_initialized_size(struct file *file, |
98 | struct ntfs_inode *ni, |
99 | const loff_t valid, |
100 | const loff_t new_valid) |
101 | { |
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; |
105 | loff_t pos = valid; |
106 | int err; |
107 | |
108 | if (is_resident(ni)) { |
109 | ni->i_valid = new_valid; |
110 | return 0; |
111 | } |
112 | |
113 | WARN_ON(is_compressed(ni)); |
114 | WARN_ON(valid >= new_valid); |
115 | |
116 | for (;;) { |
117 | u32 zerofrom, len; |
118 | struct page *page; |
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, clen: 1, lcn: &lcn, len: &clen, NULL, |
127 | zero: false); |
128 | if (err) |
129 | goto out; |
130 | |
131 | if (lcn == SPARSE_LCN) { |
132 | pos = ((loff_t)clen + vcn) << bits; |
133 | ni->i_valid = pos; |
134 | goto next; |
135 | } |
136 | } |
137 | |
138 | zerofrom = pos & (PAGE_SIZE - 1); |
139 | len = PAGE_SIZE - zerofrom; |
140 | |
141 | if (pos + len > new_valid) |
142 | len = new_valid - pos; |
143 | |
144 | err = ntfs_write_begin(file, mapping, pos, len, pagep: &page, NULL); |
145 | if (err) |
146 | goto out; |
147 | |
148 | zero_user_segment(page, start: zerofrom, PAGE_SIZE); |
149 | |
150 | /* This function in any case puts page. */ |
151 | err = ntfs_write_end(file, mapping, pos, len, copied: len, page, NULL); |
152 | if (err < 0) |
153 | goto out; |
154 | pos += len; |
155 | |
156 | next: |
157 | if (pos >= new_valid) |
158 | break; |
159 | |
160 | balance_dirty_pages_ratelimited(mapping); |
161 | cond_resched(); |
162 | } |
163 | |
164 | return 0; |
165 | |
166 | out: |
167 | ni->i_valid = valid; |
168 | ntfs_inode_warn(inode, "failed to extend initialized size to %llx." , |
169 | new_valid); |
170 | return err; |
171 | } |
172 | |
173 | /* |
174 | * ntfs_zero_range - Helper function for punch_hole. |
175 | * |
176 | * It zeroes a range [vbo, vbo_to). |
177 | */ |
178 | static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to) |
179 | { |
180 | int err = 0; |
181 | struct address_space *mapping = inode->i_mapping; |
182 | u32 blocksize = i_blocksize(node: 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; |
186 | loff_t page_off; |
187 | struct buffer_head *head, *bh; |
188 | u32 bh_next, bh_off, to; |
189 | sector_t iblock; |
190 | struct folio *folio; |
191 | bool dirty = false; |
192 | |
193 | for (; idx < idx_end; idx += 1, from = 0) { |
194 | page_off = (loff_t)idx << PAGE_SHIFT; |
195 | to = (page_off + PAGE_SIZE) > vbo_to ? (vbo_to - page_off) : |
196 | PAGE_SIZE; |
197 | iblock = page_off >> inode->i_blkbits; |
198 | |
199 | folio = __filemap_get_folio(mapping, index: idx, |
200 | FGP_LOCK | FGP_ACCESSED | FGP_CREAT, |
201 | gfp: mapping_gfp_constraint(mapping, gfp_mask: ~__GFP_FS)); |
202 | if (IS_ERR(ptr: folio)) |
203 | return PTR_ERR(ptr: folio); |
204 | |
205 | head = folio_buffers(folio); |
206 | if (!head) |
207 | head = create_empty_buffers(folio, blocksize, b_state: 0); |
208 | |
209 | bh = head; |
210 | bh_off = 0; |
211 | do { |
212 | bh_next = bh_off + blocksize; |
213 | |
214 | if (bh_next <= from || bh_off >= to) |
215 | continue; |
216 | |
217 | if (!buffer_mapped(bh)) { |
218 | ntfs_get_block(inode, vbn: iblock, bh_result: bh, create: 0); |
219 | /* Unmapped? It's a hole - nothing to do. */ |
220 | if (!buffer_mapped(bh)) |
221 | continue; |
222 | } |
223 | |
224 | /* Ok, it's mapped. Make sure it's up-to-date. */ |
225 | if (folio_test_uptodate(folio)) |
226 | set_buffer_uptodate(bh); |
227 | else if (bh_read(bh, op_flags: 0) < 0) { |
228 | err = -EIO; |
229 | folio_unlock(folio); |
230 | folio_put(folio); |
231 | goto out; |
232 | } |
233 | |
234 | mark_buffer_dirty(bh); |
235 | } while (bh_off = bh_next, iblock += 1, |
236 | head != (bh = bh->b_this_page)); |
237 | |
238 | folio_zero_segment(folio, start: from, xend: to); |
239 | dirty = true; |
240 | |
241 | folio_unlock(folio); |
242 | folio_put(folio); |
243 | cond_resched(); |
244 | } |
245 | out: |
246 | if (dirty) |
247 | mark_inode_dirty(inode); |
248 | return err; |
249 | } |
250 | |
251 | /* |
252 | * ntfs_file_mmap - file_operations::mmap |
253 | */ |
254 | static int ntfs_file_mmap(struct file *file, struct vm_area_struct *vma) |
255 | { |
256 | struct address_space *mapping = file->f_mapping; |
257 | struct inode *inode = mapping->host; |
258 | struct ntfs_inode *ni = ntfs_i(inode); |
259 | u64 from = ((u64)vma->vm_pgoff << PAGE_SHIFT); |
260 | bool rw = vma->vm_flags & VM_WRITE; |
261 | int err; |
262 | |
263 | if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
264 | return -EIO; |
265 | |
266 | if (is_encrypted(ni)) { |
267 | ntfs_inode_warn(inode, "mmap encrypted not supported" ); |
268 | return -EOPNOTSUPP; |
269 | } |
270 | |
271 | if (is_dedup(ni)) { |
272 | ntfs_inode_warn(inode, "mmap deduplicated not supported" ); |
273 | return -EOPNOTSUPP; |
274 | } |
275 | |
276 | if (is_compressed(ni) && rw) { |
277 | ntfs_inode_warn(inode, "mmap(write) compressed not supported" ); |
278 | return -EOPNOTSUPP; |
279 | } |
280 | |
281 | if (rw) { |
282 | u64 to = min_t(loff_t, i_size_read(inode), |
283 | from + vma->vm_end - vma->vm_start); |
284 | |
285 | if (is_sparsed(ni)) { |
286 | /* Allocate clusters for rw map. */ |
287 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; |
288 | CLST lcn, len; |
289 | CLST vcn = from >> sbi->cluster_bits; |
290 | CLST end = bytes_to_cluster(sbi, size: to); |
291 | bool new; |
292 | |
293 | for (; vcn < end; vcn += len) { |
294 | err = attr_data_get_block(ni, vcn, clen: 1, lcn: &lcn, |
295 | len: &len, new: &new, zero: true); |
296 | if (err) |
297 | goto out; |
298 | } |
299 | } |
300 | |
301 | if (ni->i_valid < to) { |
302 | if (!inode_trylock(inode)) { |
303 | err = -EAGAIN; |
304 | goto out; |
305 | } |
306 | err = ntfs_extend_initialized_size(file, ni, |
307 | valid: ni->i_valid, new_valid: to); |
308 | inode_unlock(inode); |
309 | if (err) |
310 | goto out; |
311 | } |
312 | } |
313 | |
314 | err = generic_file_mmap(file, vma); |
315 | out: |
316 | return err; |
317 | } |
318 | |
319 | static int ntfs_extend(struct inode *inode, loff_t pos, size_t count, |
320 | struct file *file) |
321 | { |
322 | struct ntfs_inode *ni = ntfs_i(inode); |
323 | struct address_space *mapping = inode->i_mapping; |
324 | loff_t end = pos + count; |
325 | bool extend_init = file && pos > ni->i_valid; |
326 | int err; |
327 | |
328 | if (end <= inode->i_size && !extend_init) |
329 | return 0; |
330 | |
331 | /* Mark rw ntfs as dirty. It will be cleared at umount. */ |
332 | ntfs_set_state(sbi: ni->mi.sbi, dirty: NTFS_DIRTY_DIRTY); |
333 | |
334 | if (end > inode->i_size) { |
335 | err = ntfs_set_size(inode, new_size: end); |
336 | if (err) |
337 | goto out; |
338 | } |
339 | |
340 | if (extend_init && !is_compressed(ni)) { |
341 | err = ntfs_extend_initialized_size(file, ni, valid: ni->i_valid, new_valid: pos); |
342 | if (err) |
343 | goto out; |
344 | } else { |
345 | err = 0; |
346 | } |
347 | |
348 | inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode)); |
349 | mark_inode_dirty(inode); |
350 | |
351 | if (IS_SYNC(inode)) { |
352 | int err2; |
353 | |
354 | err = filemap_fdatawrite_range(mapping, start: pos, end: end - 1); |
355 | err2 = sync_mapping_buffers(mapping); |
356 | if (!err) |
357 | err = err2; |
358 | err2 = write_inode_now(inode, sync: 1); |
359 | if (!err) |
360 | err = err2; |
361 | if (!err) |
362 | err = filemap_fdatawait_range(mapping, lstart: pos, lend: end - 1); |
363 | } |
364 | |
365 | out: |
366 | return err; |
367 | } |
368 | |
369 | static int ntfs_truncate(struct inode *inode, loff_t new_size) |
370 | { |
371 | struct super_block *sb = inode->i_sb; |
372 | struct ntfs_inode *ni = ntfs_i(inode); |
373 | int err, dirty = 0; |
374 | u64 new_valid; |
375 | |
376 | if (!S_ISREG(inode->i_mode)) |
377 | return 0; |
378 | |
379 | if (is_compressed(ni)) { |
380 | if (ni->i_valid > new_size) |
381 | ni->i_valid = new_size; |
382 | } else { |
383 | err = block_truncate_page(inode->i_mapping, new_size, |
384 | ntfs_get_block); |
385 | if (err) |
386 | return err; |
387 | } |
388 | |
389 | new_valid = ntfs_up_block(sb, min_t(u64, ni->i_valid, new_size)); |
390 | |
391 | truncate_setsize(inode, newsize: new_size); |
392 | |
393 | ni_lock(ni); |
394 | |
395 | down_write(sem: &ni->file.run_lock); |
396 | err = attr_set_size(ni, type: ATTR_DATA, NULL, name_len: 0, run: &ni->file.run, new_size, |
397 | new_valid: &new_valid, keep_prealloc: ni->mi.sbi->options->prealloc, NULL); |
398 | up_write(sem: &ni->file.run_lock); |
399 | |
400 | if (new_valid < ni->i_valid) |
401 | ni->i_valid = new_valid; |
402 | |
403 | ni_unlock(ni); |
404 | |
405 | ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE; |
406 | inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode)); |
407 | if (!IS_DIRSYNC(inode)) { |
408 | dirty = 1; |
409 | } else { |
410 | err = ntfs_sync_inode(inode); |
411 | if (err) |
412 | return err; |
413 | } |
414 | |
415 | if (dirty) |
416 | mark_inode_dirty(inode); |
417 | |
418 | /*ntfs_flush_inodes(inode->i_sb, inode, NULL);*/ |
419 | |
420 | return 0; |
421 | } |
422 | |
423 | /* |
424 | * ntfs_fallocate |
425 | * |
426 | * Preallocate space for a file. This implements ntfs's fallocate file |
427 | * operation, which gets called from sys_fallocate system call. User |
428 | * space requests 'len' bytes at 'vbo'. If FALLOC_FL_KEEP_SIZE is set |
429 | * we just allocate clusters without zeroing them out. Otherwise we |
430 | * allocate and zero out clusters via an expanding truncate. |
431 | */ |
432 | static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len) |
433 | { |
434 | struct inode *inode = file->f_mapping->host; |
435 | struct address_space *mapping = inode->i_mapping; |
436 | struct super_block *sb = inode->i_sb; |
437 | struct ntfs_sb_info *sbi = sb->s_fs_info; |
438 | struct ntfs_inode *ni = ntfs_i(inode); |
439 | loff_t end = vbo + len; |
440 | loff_t vbo_down = round_down(vbo, max_t(unsigned long, |
441 | sbi->cluster_size, PAGE_SIZE)); |
442 | bool is_supported_holes = is_sparsed(ni) || is_compressed(ni); |
443 | loff_t i_size, new_size; |
444 | bool map_locked; |
445 | int err; |
446 | |
447 | /* No support for dir. */ |
448 | if (!S_ISREG(inode->i_mode)) |
449 | return -EOPNOTSUPP; |
450 | |
451 | /* |
452 | * vfs_fallocate checks all possible combinations of mode. |
453 | * Do additional checks here before ntfs_set_state(dirty). |
454 | */ |
455 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
456 | if (!is_supported_holes) |
457 | return -EOPNOTSUPP; |
458 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
459 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
460 | if (!is_supported_holes) |
461 | return -EOPNOTSUPP; |
462 | } else if (mode & |
463 | ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
464 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)) { |
465 | ntfs_inode_warn(inode, "fallocate(0x%x) is not supported" , |
466 | mode); |
467 | return -EOPNOTSUPP; |
468 | } |
469 | |
470 | ntfs_set_state(sbi, dirty: NTFS_DIRTY_DIRTY); |
471 | |
472 | inode_lock(inode); |
473 | i_size = inode->i_size; |
474 | new_size = max(end, i_size); |
475 | map_locked = false; |
476 | |
477 | if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { |
478 | /* Should never be here, see ntfs_file_open. */ |
479 | err = -EOPNOTSUPP; |
480 | goto out; |
481 | } |
482 | |
483 | if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE | |
484 | FALLOC_FL_INSERT_RANGE)) { |
485 | inode_dio_wait(inode); |
486 | filemap_invalidate_lock(mapping); |
487 | map_locked = true; |
488 | } |
489 | |
490 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
491 | u32 frame_size; |
492 | loff_t mask, vbo_a, end_a, tmp; |
493 | |
494 | err = filemap_write_and_wait_range(mapping, lstart: vbo_down, |
495 | LLONG_MAX); |
496 | if (err) |
497 | goto out; |
498 | |
499 | truncate_pagecache(inode, new: vbo_down); |
500 | |
501 | ni_lock(ni); |
502 | err = attr_punch_hole(ni, vbo, bytes: len, frame_size: &frame_size); |
503 | ni_unlock(ni); |
504 | if (!err) |
505 | goto ok; |
506 | |
507 | if (err != E_NTFS_NOTALIGNED) |
508 | goto out; |
509 | |
510 | /* Process not aligned punch. */ |
511 | err = 0; |
512 | mask = frame_size - 1; |
513 | vbo_a = (vbo + mask) & ~mask; |
514 | end_a = end & ~mask; |
515 | |
516 | tmp = min(vbo_a, end); |
517 | if (tmp > vbo) { |
518 | err = ntfs_zero_range(inode, vbo, vbo_to: tmp); |
519 | if (err) |
520 | goto out; |
521 | } |
522 | |
523 | if (vbo < end_a && end_a < end) { |
524 | err = ntfs_zero_range(inode, vbo: end_a, vbo_to: end); |
525 | if (err) |
526 | goto out; |
527 | } |
528 | |
529 | /* Aligned punch_hole */ |
530 | if (end_a > vbo_a) { |
531 | ni_lock(ni); |
532 | err = attr_punch_hole(ni, vbo: vbo_a, bytes: end_a - vbo_a, NULL); |
533 | ni_unlock(ni); |
534 | if (err) |
535 | goto out; |
536 | } |
537 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
538 | /* |
539 | * Write tail of the last page before removed range since |
540 | * it will get removed from the page cache below. |
541 | */ |
542 | err = filemap_write_and_wait_range(mapping, lstart: vbo_down, lend: vbo); |
543 | if (err) |
544 | goto out; |
545 | |
546 | /* |
547 | * Write data that will be shifted to preserve them |
548 | * when discarding page cache below. |
549 | */ |
550 | err = filemap_write_and_wait_range(mapping, lstart: end, LLONG_MAX); |
551 | if (err) |
552 | goto out; |
553 | |
554 | truncate_pagecache(inode, new: vbo_down); |
555 | |
556 | ni_lock(ni); |
557 | err = attr_collapse_range(ni, vbo, bytes: len); |
558 | ni_unlock(ni); |
559 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
560 | /* Check new size. */ |
561 | err = inode_newsize_ok(inode, offset: new_size); |
562 | if (err) |
563 | goto out; |
564 | |
565 | /* Write out all dirty pages. */ |
566 | err = filemap_write_and_wait_range(mapping, lstart: vbo_down, |
567 | LLONG_MAX); |
568 | if (err) |
569 | goto out; |
570 | truncate_pagecache(inode, new: vbo_down); |
571 | |
572 | ni_lock(ni); |
573 | err = attr_insert_range(ni, vbo, bytes: len); |
574 | ni_unlock(ni); |
575 | if (err) |
576 | goto out; |
577 | } else { |
578 | /* Check new size. */ |
579 | u8 cluster_bits = sbi->cluster_bits; |
580 | |
581 | /* generic/213: expected -ENOSPC instead of -EFBIG. */ |
582 | if (!is_supported_holes) { |
583 | loff_t to_alloc = new_size - inode_get_bytes(inode); |
584 | |
585 | if (to_alloc > 0 && |
586 | (to_alloc >> cluster_bits) > |
587 | wnd_zeroes(wnd: &sbi->used.bitmap)) { |
588 | err = -ENOSPC; |
589 | goto out; |
590 | } |
591 | } |
592 | |
593 | err = inode_newsize_ok(inode, offset: new_size); |
594 | if (err) |
595 | goto out; |
596 | |
597 | if (new_size > i_size) { |
598 | /* |
599 | * Allocate clusters, do not change 'valid' size. |
600 | */ |
601 | err = ntfs_set_size(inode, new_size); |
602 | if (err) |
603 | goto out; |
604 | } |
605 | |
606 | if (is_supported_holes) { |
607 | CLST vcn = vbo >> cluster_bits; |
608 | CLST cend = bytes_to_cluster(sbi, size: end); |
609 | CLST cend_v = bytes_to_cluster(sbi, size: ni->i_valid); |
610 | CLST lcn, clen; |
611 | bool new; |
612 | |
613 | if (cend_v > cend) |
614 | cend_v = cend; |
615 | |
616 | /* |
617 | * Allocate and zero new clusters. |
618 | * Zeroing these clusters may be too long. |
619 | */ |
620 | for (; vcn < cend_v; vcn += clen) { |
621 | err = attr_data_get_block(ni, vcn, clen: cend_v - vcn, |
622 | lcn: &lcn, len: &clen, new: &new, |
623 | zero: true); |
624 | if (err) |
625 | goto out; |
626 | } |
627 | /* |
628 | * Allocate but not zero new clusters. |
629 | */ |
630 | for (; vcn < cend; vcn += clen) { |
631 | err = attr_data_get_block(ni, vcn, clen: cend - vcn, |
632 | lcn: &lcn, len: &clen, new: &new, |
633 | zero: false); |
634 | if (err) |
635 | goto out; |
636 | } |
637 | } |
638 | |
639 | if (mode & FALLOC_FL_KEEP_SIZE) { |
640 | ni_lock(ni); |
641 | /* True - Keep preallocated. */ |
642 | err = attr_set_size(ni, type: ATTR_DATA, NULL, name_len: 0, |
643 | run: &ni->file.run, new_size: i_size, new_valid: &ni->i_valid, |
644 | keep_prealloc: true, NULL); |
645 | ni_unlock(ni); |
646 | if (err) |
647 | goto out; |
648 | } else if (new_size > i_size) { |
649 | i_size_write(inode, i_size: new_size); |
650 | } |
651 | } |
652 | |
653 | ok: |
654 | err = file_modified(file); |
655 | if (err) |
656 | goto out; |
657 | |
658 | out: |
659 | if (map_locked) |
660 | filemap_invalidate_unlock(mapping); |
661 | |
662 | if (!err) { |
663 | inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode)); |
664 | mark_inode_dirty(inode); |
665 | } |
666 | |
667 | inode_unlock(inode); |
668 | return err; |
669 | } |
670 | |
671 | /* |
672 | * ntfs3_setattr - inode_operations::setattr |
673 | */ |
674 | int ntfs3_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
675 | struct iattr *attr) |
676 | { |
677 | struct inode *inode = d_inode(dentry); |
678 | struct ntfs_inode *ni = ntfs_i(inode); |
679 | u32 ia_valid = attr->ia_valid; |
680 | umode_t mode = inode->i_mode; |
681 | int err; |
682 | |
683 | if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
684 | return -EIO; |
685 | |
686 | err = setattr_prepare(idmap, dentry, attr); |
687 | if (err) |
688 | goto out; |
689 | |
690 | if (ia_valid & ATTR_SIZE) { |
691 | loff_t newsize, oldsize; |
692 | |
693 | if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { |
694 | /* Should never be here, see ntfs_file_open(). */ |
695 | err = -EOPNOTSUPP; |
696 | goto out; |
697 | } |
698 | inode_dio_wait(inode); |
699 | oldsize = i_size_read(inode); |
700 | newsize = attr->ia_size; |
701 | |
702 | if (newsize <= oldsize) |
703 | err = ntfs_truncate(inode, new_size: newsize); |
704 | else |
705 | err = ntfs_extend(inode, pos: newsize, count: 0, NULL); |
706 | |
707 | if (err) |
708 | goto out; |
709 | |
710 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; |
711 | i_size_write(inode, i_size: newsize); |
712 | } |
713 | |
714 | setattr_copy(idmap, inode, attr); |
715 | |
716 | if (mode != inode->i_mode) { |
717 | err = ntfs_acl_chmod(idmap, dentry); |
718 | if (err) |
719 | goto out; |
720 | |
721 | /* Linux 'w' -> Windows 'ro'. */ |
722 | if (0222 & inode->i_mode) |
723 | ni->std_fa &= ~FILE_ATTRIBUTE_READONLY; |
724 | else |
725 | ni->std_fa |= FILE_ATTRIBUTE_READONLY; |
726 | } |
727 | |
728 | if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) |
729 | ntfs_save_wsl_perm(inode, NULL); |
730 | mark_inode_dirty(inode); |
731 | out: |
732 | return err; |
733 | } |
734 | |
735 | static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter) |
736 | { |
737 | struct file *file = iocb->ki_filp; |
738 | struct inode *inode = file->f_mapping->host; |
739 | struct ntfs_inode *ni = ntfs_i(inode); |
740 | |
741 | if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
742 | return -EIO; |
743 | |
744 | if (is_encrypted(ni)) { |
745 | ntfs_inode_warn(inode, "encrypted i/o not supported" ); |
746 | return -EOPNOTSUPP; |
747 | } |
748 | |
749 | if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) { |
750 | ntfs_inode_warn(inode, "direct i/o + compressed not supported" ); |
751 | return -EOPNOTSUPP; |
752 | } |
753 | |
754 | #ifndef CONFIG_NTFS3_LZX_XPRESS |
755 | if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) { |
756 | ntfs_inode_warn( |
757 | inode, |
758 | "activate CONFIG_NTFS3_LZX_XPRESS to read external compressed files" ); |
759 | return -EOPNOTSUPP; |
760 | } |
761 | #endif |
762 | |
763 | if (is_dedup(ni)) { |
764 | ntfs_inode_warn(inode, "read deduplicated not supported" ); |
765 | return -EOPNOTSUPP; |
766 | } |
767 | |
768 | return generic_file_read_iter(iocb, iter); |
769 | } |
770 | |
771 | static ssize_t ntfs_file_splice_read(struct file *in, loff_t *ppos, |
772 | struct pipe_inode_info *pipe, size_t len, |
773 | unsigned int flags) |
774 | { |
775 | struct inode *inode = in->f_mapping->host; |
776 | struct ntfs_inode *ni = ntfs_i(inode); |
777 | |
778 | if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
779 | return -EIO; |
780 | |
781 | if (is_encrypted(ni)) { |
782 | ntfs_inode_warn(inode, "encrypted i/o not supported" ); |
783 | return -EOPNOTSUPP; |
784 | } |
785 | |
786 | #ifndef CONFIG_NTFS3_LZX_XPRESS |
787 | if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) { |
788 | ntfs_inode_warn( |
789 | inode, |
790 | "activate CONFIG_NTFS3_LZX_XPRESS to read external compressed files" ); |
791 | return -EOPNOTSUPP; |
792 | } |
793 | #endif |
794 | |
795 | if (is_dedup(ni)) { |
796 | ntfs_inode_warn(inode, "read deduplicated not supported" ); |
797 | return -EOPNOTSUPP; |
798 | } |
799 | |
800 | return filemap_splice_read(in, ppos, pipe, len, flags); |
801 | } |
802 | |
803 | /* |
804 | * ntfs_get_frame_pages |
805 | * |
806 | * Return: Array of locked pages. |
807 | */ |
808 | static int ntfs_get_frame_pages(struct address_space *mapping, pgoff_t index, |
809 | struct page **pages, u32 pages_per_frame, |
810 | bool *frame_uptodate) |
811 | { |
812 | gfp_t gfp_mask = mapping_gfp_mask(mapping); |
813 | u32 npages; |
814 | |
815 | *frame_uptodate = true; |
816 | |
817 | for (npages = 0; npages < pages_per_frame; npages++, index++) { |
818 | struct page *page; |
819 | |
820 | page = find_or_create_page(mapping, index, gfp_mask); |
821 | if (!page) { |
822 | while (npages--) { |
823 | page = pages[npages]; |
824 | unlock_page(page); |
825 | put_page(page); |
826 | } |
827 | |
828 | return -ENOMEM; |
829 | } |
830 | |
831 | if (!PageUptodate(page)) |
832 | *frame_uptodate = false; |
833 | |
834 | pages[npages] = page; |
835 | } |
836 | |
837 | return 0; |
838 | } |
839 | |
840 | /* |
841 | * ntfs_compress_write - Helper for ntfs_file_write_iter() (compressed files). |
842 | */ |
843 | static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from) |
844 | { |
845 | int err; |
846 | struct file *file = iocb->ki_filp; |
847 | size_t count = iov_iter_count(i: from); |
848 | loff_t pos = iocb->ki_pos; |
849 | struct inode *inode = file_inode(f: file); |
850 | loff_t i_size = i_size_read(inode); |
851 | struct address_space *mapping = inode->i_mapping; |
852 | struct ntfs_inode *ni = ntfs_i(inode); |
853 | u64 valid = ni->i_valid; |
854 | struct ntfs_sb_info *sbi = ni->mi.sbi; |
855 | struct page *page, **pages = NULL; |
856 | size_t written = 0; |
857 | u8 frame_bits = NTFS_LZNT_CUNIT + sbi->cluster_bits; |
858 | u32 frame_size = 1u << frame_bits; |
859 | u32 pages_per_frame = frame_size >> PAGE_SHIFT; |
860 | u32 ip, off; |
861 | CLST frame; |
862 | u64 frame_vbo; |
863 | pgoff_t index; |
864 | bool frame_uptodate; |
865 | |
866 | if (frame_size < PAGE_SIZE) { |
867 | /* |
868 | * frame_size == 8K if cluster 512 |
869 | * frame_size == 64K if cluster 4096 |
870 | */ |
871 | ntfs_inode_warn(inode, "page size is bigger than frame size" ); |
872 | return -EOPNOTSUPP; |
873 | } |
874 | |
875 | pages = kmalloc_array(n: pages_per_frame, size: sizeof(struct page *), GFP_NOFS); |
876 | if (!pages) |
877 | return -ENOMEM; |
878 | |
879 | err = file_remove_privs(file); |
880 | if (err) |
881 | goto out; |
882 | |
883 | err = file_update_time(file); |
884 | if (err) |
885 | goto out; |
886 | |
887 | /* Zero range [valid : pos). */ |
888 | while (valid < pos) { |
889 | CLST lcn, clen; |
890 | |
891 | frame = valid >> frame_bits; |
892 | frame_vbo = valid & ~(frame_size - 1); |
893 | off = valid & (frame_size - 1); |
894 | |
895 | err = attr_data_get_block(ni, vcn: frame << NTFS_LZNT_CUNIT, clen: 1, lcn: &lcn, |
896 | len: &clen, NULL, zero: false); |
897 | if (err) |
898 | goto out; |
899 | |
900 | if (lcn == SPARSE_LCN) { |
901 | ni->i_valid = valid = |
902 | frame_vbo + ((u64)clen << sbi->cluster_bits); |
903 | continue; |
904 | } |
905 | |
906 | /* Load full frame. */ |
907 | err = ntfs_get_frame_pages(mapping, index: frame_vbo >> PAGE_SHIFT, |
908 | pages, pages_per_frame, |
909 | frame_uptodate: &frame_uptodate); |
910 | if (err) |
911 | goto out; |
912 | |
913 | if (!frame_uptodate && off) { |
914 | err = ni_read_frame(ni, frame_vbo, pages, |
915 | pages_per_frame); |
916 | if (err) { |
917 | for (ip = 0; ip < pages_per_frame; ip++) { |
918 | page = pages[ip]; |
919 | unlock_page(page); |
920 | put_page(page); |
921 | } |
922 | goto out; |
923 | } |
924 | } |
925 | |
926 | ip = off >> PAGE_SHIFT; |
927 | off = offset_in_page(valid); |
928 | for (; ip < pages_per_frame; ip++, off = 0) { |
929 | page = pages[ip]; |
930 | zero_user_segment(page, start: off, PAGE_SIZE); |
931 | flush_dcache_page(page); |
932 | SetPageUptodate(page); |
933 | } |
934 | |
935 | ni_lock(ni); |
936 | err = ni_write_frame(ni, pages, pages_per_frame); |
937 | ni_unlock(ni); |
938 | |
939 | for (ip = 0; ip < pages_per_frame; ip++) { |
940 | page = pages[ip]; |
941 | SetPageUptodate(page); |
942 | unlock_page(page); |
943 | put_page(page); |
944 | } |
945 | |
946 | if (err) |
947 | goto out; |
948 | |
949 | ni->i_valid = valid = frame_vbo + frame_size; |
950 | } |
951 | |
952 | /* Copy user data [pos : pos + count). */ |
953 | while (count) { |
954 | size_t copied, bytes; |
955 | |
956 | off = pos & (frame_size - 1); |
957 | bytes = frame_size - off; |
958 | if (bytes > count) |
959 | bytes = count; |
960 | |
961 | frame_vbo = pos & ~(frame_size - 1); |
962 | index = frame_vbo >> PAGE_SHIFT; |
963 | |
964 | if (unlikely(fault_in_iov_iter_readable(from, bytes))) { |
965 | err = -EFAULT; |
966 | goto out; |
967 | } |
968 | |
969 | /* Load full frame. */ |
970 | err = ntfs_get_frame_pages(mapping, index, pages, |
971 | pages_per_frame, frame_uptodate: &frame_uptodate); |
972 | if (err) |
973 | goto out; |
974 | |
975 | if (!frame_uptodate) { |
976 | loff_t to = pos + bytes; |
977 | |
978 | if (off || (to < i_size && (to & (frame_size - 1)))) { |
979 | err = ni_read_frame(ni, frame_vbo, pages, |
980 | pages_per_frame); |
981 | if (err) { |
982 | for (ip = 0; ip < pages_per_frame; |
983 | ip++) { |
984 | page = pages[ip]; |
985 | unlock_page(page); |
986 | put_page(page); |
987 | } |
988 | goto out; |
989 | } |
990 | } |
991 | } |
992 | |
993 | WARN_ON(!bytes); |
994 | copied = 0; |
995 | ip = off >> PAGE_SHIFT; |
996 | off = offset_in_page(pos); |
997 | |
998 | /* Copy user data to pages. */ |
999 | for (;;) { |
1000 | size_t cp, tail = PAGE_SIZE - off; |
1001 | |
1002 | page = pages[ip]; |
1003 | cp = copy_page_from_iter_atomic(page, offset: off, |
1004 | min(tail, bytes), i: from); |
1005 | flush_dcache_page(page); |
1006 | |
1007 | copied += cp; |
1008 | bytes -= cp; |
1009 | if (!bytes || !cp) |
1010 | break; |
1011 | |
1012 | if (cp < tail) { |
1013 | off += cp; |
1014 | } else { |
1015 | ip++; |
1016 | off = 0; |
1017 | } |
1018 | } |
1019 | |
1020 | ni_lock(ni); |
1021 | err = ni_write_frame(ni, pages, pages_per_frame); |
1022 | ni_unlock(ni); |
1023 | |
1024 | for (ip = 0; ip < pages_per_frame; ip++) { |
1025 | page = pages[ip]; |
1026 | ClearPageDirty(page); |
1027 | SetPageUptodate(page); |
1028 | unlock_page(page); |
1029 | put_page(page); |
1030 | } |
1031 | |
1032 | if (err) |
1033 | goto out; |
1034 | |
1035 | /* |
1036 | * We can loop for a long time in here. Be nice and allow |
1037 | * us to schedule out to avoid softlocking if preempt |
1038 | * is disabled. |
1039 | */ |
1040 | cond_resched(); |
1041 | |
1042 | pos += copied; |
1043 | written += copied; |
1044 | |
1045 | count = iov_iter_count(i: from); |
1046 | } |
1047 | |
1048 | out: |
1049 | kfree(objp: pages); |
1050 | |
1051 | if (err < 0) |
1052 | return err; |
1053 | |
1054 | iocb->ki_pos += written; |
1055 | if (iocb->ki_pos > ni->i_valid) |
1056 | ni->i_valid = iocb->ki_pos; |
1057 | if (iocb->ki_pos > i_size) |
1058 | i_size_write(inode, i_size: iocb->ki_pos); |
1059 | |
1060 | return written; |
1061 | } |
1062 | |
1063 | /* |
1064 | * ntfs_file_write_iter - file_operations::write_iter |
1065 | */ |
1066 | static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
1067 | { |
1068 | struct file *file = iocb->ki_filp; |
1069 | struct address_space *mapping = file->f_mapping; |
1070 | struct inode *inode = mapping->host; |
1071 | ssize_t ret; |
1072 | int err; |
1073 | struct ntfs_inode *ni = ntfs_i(inode); |
1074 | |
1075 | if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
1076 | return -EIO; |
1077 | |
1078 | if (is_encrypted(ni)) { |
1079 | ntfs_inode_warn(inode, "encrypted i/o not supported" ); |
1080 | return -EOPNOTSUPP; |
1081 | } |
1082 | |
1083 | if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) { |
1084 | ntfs_inode_warn(inode, "direct i/o + compressed not supported" ); |
1085 | return -EOPNOTSUPP; |
1086 | } |
1087 | |
1088 | if (is_dedup(ni)) { |
1089 | ntfs_inode_warn(inode, "write into deduplicated not supported" ); |
1090 | return -EOPNOTSUPP; |
1091 | } |
1092 | |
1093 | if (!inode_trylock(inode)) { |
1094 | if (iocb->ki_flags & IOCB_NOWAIT) |
1095 | return -EAGAIN; |
1096 | inode_lock(inode); |
1097 | } |
1098 | |
1099 | ret = generic_write_checks(iocb, from); |
1100 | if (ret <= 0) |
1101 | goto out; |
1102 | |
1103 | err = file_modified(file: iocb->ki_filp); |
1104 | if (err) { |
1105 | ret = err; |
1106 | goto out; |
1107 | } |
1108 | |
1109 | if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { |
1110 | /* Should never be here, see ntfs_file_open(). */ |
1111 | ret = -EOPNOTSUPP; |
1112 | goto out; |
1113 | } |
1114 | |
1115 | ret = ntfs_extend(inode, pos: iocb->ki_pos, count: ret, file); |
1116 | if (ret) |
1117 | goto out; |
1118 | |
1119 | ret = is_compressed(ni) ? ntfs_compress_write(iocb, from) : |
1120 | __generic_file_write_iter(iocb, from); |
1121 | |
1122 | out: |
1123 | inode_unlock(inode); |
1124 | |
1125 | if (ret > 0) |
1126 | ret = generic_write_sync(iocb, count: ret); |
1127 | |
1128 | return ret; |
1129 | } |
1130 | |
1131 | /* |
1132 | * ntfs_file_open - file_operations::open |
1133 | */ |
1134 | int ntfs_file_open(struct inode *inode, struct file *file) |
1135 | { |
1136 | struct ntfs_inode *ni = ntfs_i(inode); |
1137 | |
1138 | if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
1139 | return -EIO; |
1140 | |
1141 | if (unlikely((is_compressed(ni) || is_encrypted(ni)) && |
1142 | (file->f_flags & O_DIRECT))) { |
1143 | return -EOPNOTSUPP; |
1144 | } |
1145 | |
1146 | /* Decompress "external compressed" file if opened for rw. */ |
1147 | if ((ni->ni_flags & NI_FLAG_COMPRESSED_MASK) && |
1148 | (file->f_flags & (O_WRONLY | O_RDWR | O_TRUNC))) { |
1149 | #ifdef CONFIG_NTFS3_LZX_XPRESS |
1150 | int err = ni_decompress_file(ni); |
1151 | |
1152 | if (err) |
1153 | return err; |
1154 | #else |
1155 | ntfs_inode_warn( |
1156 | inode, |
1157 | "activate CONFIG_NTFS3_LZX_XPRESS to write external compressed files" ); |
1158 | return -EOPNOTSUPP; |
1159 | #endif |
1160 | } |
1161 | |
1162 | return generic_file_open(inode, filp: file); |
1163 | } |
1164 | |
1165 | /* |
1166 | * ntfs_file_release - file_operations::release |
1167 | */ |
1168 | static int ntfs_file_release(struct inode *inode, struct file *file) |
1169 | { |
1170 | struct ntfs_inode *ni = ntfs_i(inode); |
1171 | struct ntfs_sb_info *sbi = ni->mi.sbi; |
1172 | int err = 0; |
1173 | |
1174 | /* If we are last writer on the inode, drop the block reservation. */ |
1175 | if (sbi->options->prealloc && |
1176 | ((file->f_mode & FMODE_WRITE) && |
1177 | atomic_read(v: &inode->i_writecount) == 1)) { |
1178 | ni_lock(ni); |
1179 | down_write(sem: &ni->file.run_lock); |
1180 | |
1181 | err = attr_set_size(ni, type: ATTR_DATA, NULL, name_len: 0, run: &ni->file.run, |
1182 | new_size: i_size_read(inode), new_valid: &ni->i_valid, keep_prealloc: false, |
1183 | NULL); |
1184 | |
1185 | up_write(sem: &ni->file.run_lock); |
1186 | ni_unlock(ni); |
1187 | } |
1188 | return err; |
1189 | } |
1190 | |
1191 | /* |
1192 | * ntfs_fiemap - file_operations::fiemap |
1193 | */ |
1194 | int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1195 | __u64 start, __u64 len) |
1196 | { |
1197 | int err; |
1198 | struct ntfs_inode *ni = ntfs_i(inode); |
1199 | |
1200 | err = fiemap_prep(inode, fieinfo, start, len: &len, supported_flags: ~FIEMAP_FLAG_XATTR); |
1201 | if (err) |
1202 | return err; |
1203 | |
1204 | ni_lock(ni); |
1205 | |
1206 | err = ni_fiemap(ni, fieinfo, vbo: start, len); |
1207 | |
1208 | ni_unlock(ni); |
1209 | |
1210 | return err; |
1211 | } |
1212 | |
1213 | // clang-format off |
1214 | const struct inode_operations ntfs_file_inode_operations = { |
1215 | .getattr = ntfs_getattr, |
1216 | .setattr = ntfs3_setattr, |
1217 | .listxattr = ntfs_listxattr, |
1218 | .get_acl = ntfs_get_acl, |
1219 | .set_acl = ntfs_set_acl, |
1220 | .fiemap = ntfs_fiemap, |
1221 | }; |
1222 | |
1223 | const struct file_operations ntfs_file_operations = { |
1224 | .llseek = generic_file_llseek, |
1225 | .read_iter = ntfs_file_read_iter, |
1226 | .write_iter = ntfs_file_write_iter, |
1227 | .unlocked_ioctl = ntfs_ioctl, |
1228 | #ifdef CONFIG_COMPAT |
1229 | .compat_ioctl = ntfs_compat_ioctl, |
1230 | #endif |
1231 | .splice_read = ntfs_file_splice_read, |
1232 | .mmap = ntfs_file_mmap, |
1233 | .open = ntfs_file_open, |
1234 | .fsync = generic_file_fsync, |
1235 | .splice_write = iter_file_splice_write, |
1236 | .fallocate = ntfs_fallocate, |
1237 | .release = ntfs_file_release, |
1238 | }; |
1239 | // clang-format on |
1240 | |