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 #include <linux/fileattr.h>
17 
18 #include "debug.h"
19 #include "ntfs.h"
20 #include "ntfs_fs.h"
21 
ntfs_ioctl_fitrim(struct ntfs_sb_info * sbi,unsigned long arg)22 static int ntfs_ioctl_fitrim(struct ntfs_sb_info *sbi, unsigned long arg)
23 {
24 	struct fstrim_range __user *user_range;
25 	struct fstrim_range range;
26 	struct block_device *dev;
27 	int err;
28 
29 	if (!capable(CAP_SYS_ADMIN))
30 		return -EPERM;
31 
32 	dev = sbi->sb->s_bdev;
33 	if (!bdev_max_discard_sectors(dev))
34 		return -EOPNOTSUPP;
35 
36 	user_range = (struct fstrim_range __user *)arg;
37 	if (copy_from_user(&range, user_range, sizeof(range)))
38 		return -EFAULT;
39 
40 	range.minlen = max_t(u32, range.minlen, bdev_discard_granularity(dev));
41 
42 	err = ntfs_trim_fs(sbi, &range);
43 	if (err < 0)
44 		return err;
45 
46 	if (copy_to_user(user_range, &range, sizeof(range)))
47 		return -EFAULT;
48 
49 	return 0;
50 }
51 
52 /*
53  * ntfs_fileattr_get - inode_operations::fileattr_get
54  */
ntfs_fileattr_get(struct dentry * dentry,struct fileattr * fa)55 int ntfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
56 {
57 	struct inode *inode = d_inode(dentry);
58 	struct ntfs_inode *ni = ntfs_i(inode);
59 	u32 flags = 0;
60 
61 	if (inode->i_flags & S_IMMUTABLE)
62 		flags |= FS_IMMUTABLE_FL;
63 
64 	if (inode->i_flags & S_APPEND)
65 		flags |= FS_APPEND_FL;
66 
67 	if (is_compressed(ni))
68 		flags |= FS_COMPR_FL;
69 
70 	if (is_encrypted(ni))
71 		flags |= FS_ENCRYPT_FL;
72 
73 	fileattr_fill_flags(fa, flags);
74 
75 	return 0;
76 }
77 
78 /*
79  * ntfs_fileattr_set - inode_operations::fileattr_set
80  */
ntfs_fileattr_set(struct mnt_idmap * idmap,struct dentry * dentry,struct fileattr * fa)81 int ntfs_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry,
82 		      struct fileattr *fa)
83 {
84 	struct inode *inode = d_inode(dentry);
85 	struct ntfs_inode *ni = ntfs_i(inode);
86 	u32 flags = fa->flags;
87 	unsigned int new_fl = 0;
88 
89 	if (fileattr_has_fsx(fa))
90 		return -EOPNOTSUPP;
91 
92 	if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_COMPR_FL))
93 		return -EOPNOTSUPP;
94 
95 	if (flags & FS_IMMUTABLE_FL)
96 		new_fl |= S_IMMUTABLE;
97 
98 	if (flags & FS_APPEND_FL)
99 		new_fl |= S_APPEND;
100 
101 	/* Allowed to change compression for empty files and for directories only. */
102 	if (!is_dedup(ni) && !is_encrypted(ni) &&
103 	    (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
104 		int err = 0;
105 		struct address_space *mapping = inode->i_mapping;
106 
107 		/* write out all data and wait. */
108 		filemap_invalidate_lock(mapping);
109 		err = filemap_write_and_wait(mapping);
110 
111 		if (err >= 0) {
112 			/* Change compress state. */
113 			bool compr = flags & FS_COMPR_FL;
114 			err = ni_set_compress(inode, compr);
115 
116 			/* For files change a_ops too. */
117 			if (!err)
118 				mapping->a_ops = compr ? &ntfs_aops_cmpr :
119 							 &ntfs_aops;
120 		}
121 
122 		filemap_invalidate_unlock(mapping);
123 
124 		if (err)
125 			return err;
126 	}
127 
128 	inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
129 
130 	inode_set_ctime_current(inode);
131 	mark_inode_dirty(inode);
132 
133 	return 0;
134 }
135 
136 /*
137  * ntfs_ioctl - file_operations::unlocked_ioctl
138  */
ntfs_ioctl(struct file * filp,u32 cmd,unsigned long arg)139 long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg)
140 {
141 	struct inode *inode = file_inode(filp);
142 	struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
143 
144 	switch (cmd) {
145 	case FITRIM:
146 		return ntfs_ioctl_fitrim(sbi, arg);
147 	}
148 	return -ENOTTY; /* Inappropriate ioctl for device. */
149 }
150 
151 #ifdef CONFIG_COMPAT
ntfs_compat_ioctl(struct file * filp,u32 cmd,unsigned long arg)152 long ntfs_compat_ioctl(struct file *filp, u32 cmd, unsigned long arg)
153 
154 {
155 	return ntfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
156 }
157 #endif
158 
159 /*
160  * ntfs_getattr - inode_operations::getattr
161  */
ntfs_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,u32 flags)162 int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path,
163 		 struct kstat *stat, u32 request_mask, u32 flags)
164 {
165 	struct inode *inode = d_inode(path->dentry);
166 	struct ntfs_inode *ni = ntfs_i(inode);
167 
168 	stat->result_mask |= STATX_BTIME;
169 	stat->btime = ni->i_crtime;
170 	stat->blksize = ni->mi.sbi->cluster_size; /* 512, 1K, ..., 2M */
171 
172 	if (inode->i_flags & S_IMMUTABLE)
173 		stat->attributes |= STATX_ATTR_IMMUTABLE;
174 
175 	if (inode->i_flags & S_APPEND)
176 		stat->attributes |= STATX_ATTR_APPEND;
177 
178 	if (is_compressed(ni))
179 		stat->attributes |= STATX_ATTR_COMPRESSED;
180 
181 	if (is_encrypted(ni))
182 		stat->attributes |= STATX_ATTR_ENCRYPTED;
183 
184 	stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED |
185 				 STATX_ATTR_IMMUTABLE | STATX_ATTR_APPEND;
186 
187 	generic_fillattr(idmap, request_mask, inode, stat);
188 
189 	return 0;
190 }
191 
ntfs_extend_initialized_size(struct file * file,struct ntfs_inode * ni,const loff_t valid,const loff_t new_valid)192 static int ntfs_extend_initialized_size(struct file *file,
193 					struct ntfs_inode *ni,
194 					const loff_t valid,
195 					const loff_t new_valid)
196 {
197 	struct inode *inode = &ni->vfs_inode;
198 	struct address_space *mapping = inode->i_mapping;
199 	struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
200 	loff_t pos = valid;
201 	int err;
202 
203 	if (valid >= new_valid)
204 		return 0;
205 
206 	if (is_resident(ni)) {
207 		ni->i_valid = new_valid;
208 		return 0;
209 	}
210 
211 	WARN_ON(is_compressed(ni));
212 
213 	for (;;) {
214 		u32 zerofrom, len;
215 		struct folio *folio;
216 		u8 bits;
217 		CLST vcn, lcn, clen;
218 
219 		if (is_sparsed(ni)) {
220 			bits = sbi->cluster_bits;
221 			vcn = pos >> bits;
222 
223 			err = attr_data_get_block(ni, vcn, 1, &lcn, &clen, NULL,
224 						  false);
225 			if (err)
226 				goto out;
227 
228 			if (lcn == SPARSE_LCN) {
229 				pos = ((loff_t)clen + vcn) << bits;
230 				ni->i_valid = pos;
231 				goto next;
232 			}
233 		}
234 
235 		zerofrom = pos & (PAGE_SIZE - 1);
236 		len = PAGE_SIZE - zerofrom;
237 
238 		if (pos + len > new_valid)
239 			len = new_valid - pos;
240 
241 		err = ntfs_write_begin(file, mapping, pos, len, &folio, NULL);
242 		if (err)
243 			goto out;
244 
245 		folio_zero_range(folio, zerofrom, folio_size(folio) - zerofrom);
246 
247 		err = ntfs_write_end(file, mapping, pos, len, len, folio, NULL);
248 		if (err < 0)
249 			goto out;
250 		pos += len;
251 
252 next:
253 		if (pos >= new_valid)
254 			break;
255 
256 		balance_dirty_pages_ratelimited(mapping);
257 		cond_resched();
258 	}
259 
260 	return 0;
261 
262 out:
263 	ni->i_valid = valid;
264 	ntfs_inode_warn(inode, "failed to extend initialized size to %llx.",
265 			new_valid);
266 	return err;
267 }
268 
269 /*
270  * ntfs_zero_range - Helper function for punch_hole.
271  *
272  * It zeroes a range [vbo, vbo_to).
273  */
ntfs_zero_range(struct inode * inode,u64 vbo,u64 vbo_to)274 static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to)
275 {
276 	int err = 0;
277 	struct address_space *mapping = inode->i_mapping;
278 	u32 blocksize = i_blocksize(inode);
279 	pgoff_t idx = vbo >> PAGE_SHIFT;
280 	u32 from = vbo & (PAGE_SIZE - 1);
281 	pgoff_t idx_end = (vbo_to + PAGE_SIZE - 1) >> PAGE_SHIFT;
282 	loff_t page_off;
283 	struct buffer_head *head, *bh;
284 	u32 bh_next, bh_off, to;
285 	sector_t iblock;
286 	struct folio *folio;
287 	bool dirty = false;
288 
289 	for (; idx < idx_end; idx += 1, from = 0) {
290 		page_off = (loff_t)idx << PAGE_SHIFT;
291 		to = (page_off + PAGE_SIZE) > vbo_to ? (vbo_to - page_off) :
292 						       PAGE_SIZE;
293 		iblock = page_off >> inode->i_blkbits;
294 
295 		folio = __filemap_get_folio(
296 			mapping, idx, FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
297 			mapping_gfp_constraint(mapping, ~__GFP_FS));
298 		if (IS_ERR(folio))
299 			return PTR_ERR(folio);
300 
301 		head = folio_buffers(folio);
302 		if (!head)
303 			head = create_empty_buffers(folio, blocksize, 0);
304 
305 		bh = head;
306 		bh_off = 0;
307 		do {
308 			bh_next = bh_off + blocksize;
309 
310 			if (bh_next <= from || bh_off >= to)
311 				continue;
312 
313 			if (!buffer_mapped(bh)) {
314 				ntfs_get_block(inode, iblock, bh, 0);
315 				/* Unmapped? It's a hole - nothing to do. */
316 				if (!buffer_mapped(bh))
317 					continue;
318 			}
319 
320 			/* Ok, it's mapped. Make sure it's up-to-date. */
321 			if (folio_test_uptodate(folio))
322 				set_buffer_uptodate(bh);
323 			else if (bh_read(bh, 0) < 0) {
324 				err = -EIO;
325 				folio_unlock(folio);
326 				folio_put(folio);
327 				goto out;
328 			}
329 
330 			mark_buffer_dirty(bh);
331 		} while (bh_off = bh_next, iblock += 1,
332 			 head != (bh = bh->b_this_page));
333 
334 		folio_zero_segment(folio, from, to);
335 		dirty = true;
336 
337 		folio_unlock(folio);
338 		folio_put(folio);
339 		cond_resched();
340 	}
341 out:
342 	if (dirty)
343 		mark_inode_dirty(inode);
344 	return err;
345 }
346 
347 /*
348  * ntfs_file_mmap - file_operations::mmap
349  */
ntfs_file_mmap(struct file * file,struct vm_area_struct * vma)350 static int ntfs_file_mmap(struct file *file, struct vm_area_struct *vma)
351 {
352 	struct inode *inode = file_inode(file);
353 	struct ntfs_inode *ni = ntfs_i(inode);
354 	u64 from = ((u64)vma->vm_pgoff << PAGE_SHIFT);
355 	bool rw = vma->vm_flags & VM_WRITE;
356 	int err;
357 
358 	if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
359 		return -EIO;
360 
361 	if (is_encrypted(ni)) {
362 		ntfs_inode_warn(inode, "mmap encrypted not supported");
363 		return -EOPNOTSUPP;
364 	}
365 
366 	if (is_dedup(ni)) {
367 		ntfs_inode_warn(inode, "mmap deduplicated not supported");
368 		return -EOPNOTSUPP;
369 	}
370 
371 	if (is_compressed(ni) && rw) {
372 		ntfs_inode_warn(inode, "mmap(write) compressed not supported");
373 		return -EOPNOTSUPP;
374 	}
375 
376 	if (rw) {
377 		u64 to = min_t(loff_t, i_size_read(inode),
378 			       from + vma->vm_end - vma->vm_start);
379 
380 		if (is_sparsed(ni)) {
381 			/* Allocate clusters for rw map. */
382 			struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
383 			CLST lcn, len;
384 			CLST vcn = from >> sbi->cluster_bits;
385 			CLST end = bytes_to_cluster(sbi, to);
386 			bool new;
387 
388 			for (; vcn < end; vcn += len) {
389 				err = attr_data_get_block(ni, vcn, 1, &lcn,
390 							  &len, &new, true);
391 				if (err)
392 					goto out;
393 			}
394 		}
395 
396 		if (ni->i_valid < to) {
397 			inode_lock(inode);
398 			err = ntfs_extend_initialized_size(file, ni,
399 							   ni->i_valid, to);
400 			inode_unlock(inode);
401 			if (err)
402 				goto out;
403 		}
404 	}
405 
406 	err = generic_file_mmap(file, vma);
407 out:
408 	return err;
409 }
410 
ntfs_extend(struct inode * inode,loff_t pos,size_t count,struct file * file)411 static int ntfs_extend(struct inode *inode, loff_t pos, size_t count,
412 		       struct file *file)
413 {
414 	struct ntfs_inode *ni = ntfs_i(inode);
415 	struct address_space *mapping = inode->i_mapping;
416 	loff_t end = pos + count;
417 	bool extend_init = file && pos > ni->i_valid;
418 	int err;
419 
420 	if (end <= inode->i_size && !extend_init)
421 		return 0;
422 
423 	/* Mark rw ntfs as dirty. It will be cleared at umount. */
424 	ntfs_set_state(ni->mi.sbi, NTFS_DIRTY_DIRTY);
425 
426 	if (end > inode->i_size) {
427 		err = ntfs_set_size(inode, end);
428 		if (err)
429 			goto out;
430 	}
431 
432 	if (extend_init && !is_compressed(ni)) {
433 		WARN_ON(ni->i_valid >= pos);
434 		err = ntfs_extend_initialized_size(file, ni, ni->i_valid, pos);
435 		if (err)
436 			goto out;
437 	} else {
438 		err = 0;
439 	}
440 
441 	if (file && is_sparsed(ni)) {
442 		/*
443 		 * This code optimizes large writes to sparse file.
444 		 * TODO: merge this fragment with fallocate fragment.
445 		 */
446 		struct ntfs_sb_info *sbi = ni->mi.sbi;
447 		CLST vcn = pos >> sbi->cluster_bits;
448 		CLST cend = bytes_to_cluster(sbi, end);
449 		CLST cend_v = bytes_to_cluster(sbi, ni->i_valid);
450 		CLST lcn, clen;
451 		bool new;
452 
453 		if (cend_v > cend)
454 			cend_v = cend;
455 
456 		/*
457 		 * Allocate and zero new clusters.
458 		 * Zeroing these clusters may be too long.
459 		 */
460 		for (; vcn < cend_v; vcn += clen) {
461 			err = attr_data_get_block(ni, vcn, cend_v - vcn, &lcn,
462 						  &clen, &new, true);
463 			if (err)
464 				goto out;
465 		}
466 		/*
467 		 * Allocate but not zero new clusters.
468 		 */
469 		for (; vcn < cend; vcn += clen) {
470 			err = attr_data_get_block(ni, vcn, cend - vcn, &lcn,
471 						  &clen, &new, false);
472 			if (err)
473 				goto out;
474 		}
475 	}
476 
477 	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
478 	mark_inode_dirty(inode);
479 
480 	if (IS_SYNC(inode)) {
481 		int err2;
482 
483 		err = filemap_fdatawrite_range(mapping, pos, end - 1);
484 		err2 = sync_mapping_buffers(mapping);
485 		if (!err)
486 			err = err2;
487 		err2 = write_inode_now(inode, 1);
488 		if (!err)
489 			err = err2;
490 		if (!err)
491 			err = filemap_fdatawait_range(mapping, pos, end - 1);
492 	}
493 
494 out:
495 	return err;
496 }
497 
ntfs_truncate(struct inode * inode,loff_t new_size)498 static int ntfs_truncate(struct inode *inode, loff_t new_size)
499 {
500 	struct super_block *sb = inode->i_sb;
501 	struct ntfs_inode *ni = ntfs_i(inode);
502 	int err, dirty = 0;
503 	u64 new_valid;
504 
505 	if (!S_ISREG(inode->i_mode))
506 		return 0;
507 
508 	if (is_compressed(ni)) {
509 		if (ni->i_valid > new_size)
510 			ni->i_valid = new_size;
511 	} else {
512 		err = block_truncate_page(inode->i_mapping, new_size,
513 					  ntfs_get_block);
514 		if (err)
515 			return err;
516 	}
517 
518 	new_valid = ntfs_up_block(sb, min_t(u64, ni->i_valid, new_size));
519 
520 	truncate_setsize(inode, new_size);
521 
522 	ni_lock(ni);
523 
524 	down_write(&ni->file.run_lock);
525 	err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size,
526 			    &new_valid, ni->mi.sbi->options->prealloc, NULL);
527 	up_write(&ni->file.run_lock);
528 
529 	if (new_valid < ni->i_valid)
530 		ni->i_valid = new_valid;
531 
532 	ni_unlock(ni);
533 
534 	ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE;
535 	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
536 	if (!IS_DIRSYNC(inode)) {
537 		dirty = 1;
538 	} else {
539 		err = ntfs_sync_inode(inode);
540 		if (err)
541 			return err;
542 	}
543 
544 	if (dirty)
545 		mark_inode_dirty(inode);
546 
547 	/*ntfs_flush_inodes(inode->i_sb, inode, NULL);*/
548 
549 	return 0;
550 }
551 
552 /*
553  * ntfs_fallocate - file_operations::ntfs_fallocate
554  *
555  * Preallocate space for a file. This implements ntfs's fallocate file
556  * operation, which gets called from sys_fallocate system call. User
557  * space requests 'len' bytes at 'vbo'. If FALLOC_FL_KEEP_SIZE is set
558  * we just allocate clusters without zeroing them out. Otherwise we
559  * allocate and zero out clusters via an expanding truncate.
560  */
ntfs_fallocate(struct file * file,int mode,loff_t vbo,loff_t len)561 static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len)
562 {
563 	struct inode *inode = file_inode(file);
564 	struct address_space *mapping = inode->i_mapping;
565 	struct super_block *sb = inode->i_sb;
566 	struct ntfs_sb_info *sbi = sb->s_fs_info;
567 	struct ntfs_inode *ni = ntfs_i(inode);
568 	loff_t end = vbo + len;
569 	loff_t vbo_down = round_down(vbo, max_t(unsigned long,
570 						sbi->cluster_size, PAGE_SIZE));
571 	bool is_supported_holes = is_sparsed(ni) || is_compressed(ni);
572 	loff_t i_size, new_size;
573 	bool map_locked;
574 	int err;
575 
576 	/* No support for dir. */
577 	if (!S_ISREG(inode->i_mode))
578 		return -EOPNOTSUPP;
579 
580 	/*
581 	 * vfs_fallocate checks all possible combinations of mode.
582 	 * Do additional checks here before ntfs_set_state(dirty).
583 	 */
584 	if (mode & FALLOC_FL_PUNCH_HOLE) {
585 		if (!is_supported_holes)
586 			return -EOPNOTSUPP;
587 	} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
588 	} else if (mode & FALLOC_FL_INSERT_RANGE) {
589 		if (!is_supported_holes)
590 			return -EOPNOTSUPP;
591 	} else if (mode &
592 		   ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
593 		     FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)) {
594 		ntfs_inode_warn(inode, "fallocate(0x%x) is not supported",
595 				mode);
596 		return -EOPNOTSUPP;
597 	}
598 
599 	ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
600 
601 	inode_lock(inode);
602 	i_size = inode->i_size;
603 	new_size = max(end, i_size);
604 	map_locked = false;
605 
606 	if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) {
607 		/* Should never be here, see ntfs_file_open. */
608 		err = -EOPNOTSUPP;
609 		goto out;
610 	}
611 
612 	if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
613 		    FALLOC_FL_INSERT_RANGE)) {
614 		inode_dio_wait(inode);
615 		filemap_invalidate_lock(mapping);
616 		map_locked = true;
617 	}
618 
619 	if (mode & FALLOC_FL_PUNCH_HOLE) {
620 		u32 frame_size;
621 		loff_t mask, vbo_a, end_a, tmp;
622 
623 		err = filemap_write_and_wait_range(mapping, vbo_down,
624 						   LLONG_MAX);
625 		if (err)
626 			goto out;
627 
628 		truncate_pagecache(inode, vbo_down);
629 
630 		ni_lock(ni);
631 		err = attr_punch_hole(ni, vbo, len, &frame_size);
632 		ni_unlock(ni);
633 		if (!err)
634 			goto ok;
635 
636 		if (err != E_NTFS_NOTALIGNED)
637 			goto out;
638 
639 		/* Process not aligned punch. */
640 		err = 0;
641 		mask = frame_size - 1;
642 		vbo_a = (vbo + mask) & ~mask;
643 		end_a = end & ~mask;
644 
645 		tmp = min(vbo_a, end);
646 		if (tmp > vbo) {
647 			err = ntfs_zero_range(inode, vbo, tmp);
648 			if (err)
649 				goto out;
650 		}
651 
652 		if (vbo < end_a && end_a < end) {
653 			err = ntfs_zero_range(inode, end_a, end);
654 			if (err)
655 				goto out;
656 		}
657 
658 		/* Aligned punch_hole */
659 		if (end_a > vbo_a) {
660 			ni_lock(ni);
661 			err = attr_punch_hole(ni, vbo_a, end_a - vbo_a, NULL);
662 			ni_unlock(ni);
663 			if (err)
664 				goto out;
665 		}
666 	} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
667 		/*
668 		 * Write tail of the last page before removed range since
669 		 * it will get removed from the page cache below.
670 		 */
671 		err = filemap_write_and_wait_range(mapping, vbo_down, vbo);
672 		if (err)
673 			goto out;
674 
675 		/*
676 		 * Write data that will be shifted to preserve them
677 		 * when discarding page cache below.
678 		 */
679 		err = filemap_write_and_wait_range(mapping, end, LLONG_MAX);
680 		if (err)
681 			goto out;
682 
683 		truncate_pagecache(inode, vbo_down);
684 
685 		ni_lock(ni);
686 		err = attr_collapse_range(ni, vbo, len);
687 		ni_unlock(ni);
688 		if (err)
689 			goto out;
690 	} else if (mode & FALLOC_FL_INSERT_RANGE) {
691 		/* Check new size. */
692 		err = inode_newsize_ok(inode, new_size);
693 		if (err)
694 			goto out;
695 
696 		/* Write out all dirty pages. */
697 		err = filemap_write_and_wait_range(mapping, vbo_down,
698 						   LLONG_MAX);
699 		if (err)
700 			goto out;
701 		truncate_pagecache(inode, vbo_down);
702 
703 		ni_lock(ni);
704 		err = attr_insert_range(ni, vbo, len);
705 		ni_unlock(ni);
706 		if (err)
707 			goto out;
708 	} else {
709 		/* Check new size. */
710 		u8 cluster_bits = sbi->cluster_bits;
711 
712 		/* Be sure file is non resident. */
713 		if (is_resident(ni)) {
714 			ni_lock(ni);
715 			err = attr_force_nonresident(ni);
716 			ni_unlock(ni);
717 			if (err)
718 				goto out;
719 		}
720 
721 		/* generic/213: expected -ENOSPC instead of -EFBIG. */
722 		if (!is_supported_holes) {
723 			loff_t to_alloc = new_size - inode_get_bytes(inode);
724 
725 			if (to_alloc > 0 &&
726 			    (to_alloc >> cluster_bits) >
727 				    wnd_zeroes(&sbi->used.bitmap)) {
728 				err = -ENOSPC;
729 				goto out;
730 			}
731 		}
732 
733 		err = inode_newsize_ok(inode, new_size);
734 		if (err)
735 			goto out;
736 
737 		if (new_size > i_size) {
738 			/*
739 			 * Allocate clusters, do not change 'valid' size.
740 			 */
741 			err = ntfs_set_size(inode, new_size);
742 			if (err)
743 				goto out;
744 		}
745 
746 		if (is_supported_holes) {
747 			CLST vcn = vbo >> cluster_bits;
748 			CLST cend = bytes_to_cluster(sbi, end);
749 			CLST cend_v = bytes_to_cluster(sbi, ni->i_valid);
750 			CLST lcn, clen;
751 			bool new;
752 
753 			if (cend_v > cend)
754 				cend_v = cend;
755 
756 			/*
757 			 * Allocate and zero new clusters.
758 			 * Zeroing these clusters may be too long.
759 			 */
760 			for (; vcn < cend_v; vcn += clen) {
761 				err = attr_data_get_block(ni, vcn, cend_v - vcn,
762 							  &lcn, &clen, &new,
763 							  true);
764 				if (err)
765 					goto out;
766 			}
767 			/*
768 			 * Allocate but not zero new clusters.
769 			 */
770 			for (; vcn < cend; vcn += clen) {
771 				err = attr_data_get_block(ni, vcn, cend - vcn,
772 							  &lcn, &clen, &new,
773 							  false);
774 				if (err)
775 					goto out;
776 			}
777 		}
778 
779 		if (mode & FALLOC_FL_KEEP_SIZE) {
780 			ni_lock(ni);
781 			/* True - Keep preallocated. */
782 			err = attr_set_size(ni, ATTR_DATA, NULL, 0,
783 					    &ni->file.run, i_size, &ni->i_valid,
784 					    true, NULL);
785 			ni_unlock(ni);
786 			if (err)
787 				goto out;
788 		} else if (new_size > i_size) {
789 			i_size_write(inode, new_size);
790 		}
791 	}
792 
793 ok:
794 	err = file_modified(file);
795 	if (err)
796 		goto out;
797 
798 out:
799 	if (map_locked)
800 		filemap_invalidate_unlock(mapping);
801 
802 	if (!err) {
803 		inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
804 		mark_inode_dirty(inode);
805 	}
806 
807 	inode_unlock(inode);
808 	return err;
809 }
810 
811 /*
812  * ntfs_setattr - inode_operations::setattr
813  */
ntfs_setattr(struct mnt_idmap * idmap,struct dentry * dentry,struct iattr * attr)814 int ntfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
815 		 struct iattr *attr)
816 {
817 	struct inode *inode = d_inode(dentry);
818 	struct ntfs_inode *ni = ntfs_i(inode);
819 	u32 ia_valid = attr->ia_valid;
820 	umode_t mode = inode->i_mode;
821 	int err;
822 
823 	if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
824 		return -EIO;
825 
826 	err = setattr_prepare(idmap, dentry, attr);
827 	if (err)
828 		goto out;
829 
830 	if (ia_valid & ATTR_SIZE) {
831 		loff_t newsize, oldsize;
832 
833 		if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) {
834 			/* Should never be here, see ntfs_file_open(). */
835 			err = -EOPNOTSUPP;
836 			goto out;
837 		}
838 		inode_dio_wait(inode);
839 		oldsize = i_size_read(inode);
840 		newsize = attr->ia_size;
841 
842 		if (newsize <= oldsize)
843 			err = ntfs_truncate(inode, newsize);
844 		else
845 			err = ntfs_extend(inode, newsize, 0, NULL);
846 
847 		if (err)
848 			goto out;
849 
850 		ni->ni_flags |= NI_FLAG_UPDATE_PARENT;
851 		i_size_write(inode, newsize);
852 	}
853 
854 	setattr_copy(idmap, inode, attr);
855 
856 	if (mode != inode->i_mode) {
857 		err = ntfs_acl_chmod(idmap, dentry);
858 		if (err)
859 			goto out;
860 
861 		/* Linux 'w' -> Windows 'ro'. */
862 		if (0222 & inode->i_mode)
863 			ni->std_fa &= ~FILE_ATTRIBUTE_READONLY;
864 		else
865 			ni->std_fa |= FILE_ATTRIBUTE_READONLY;
866 	}
867 
868 	if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE))
869 		ntfs_save_wsl_perm(inode, NULL);
870 	mark_inode_dirty(inode);
871 out:
872 	return err;
873 }
874 
875 /*
876  * check_read_restriction:
877  * common code for ntfs_file_read_iter and ntfs_file_splice_read
878  */
check_read_restriction(struct inode * inode)879 static int check_read_restriction(struct inode *inode)
880 {
881 	struct ntfs_inode *ni = ntfs_i(inode);
882 
883 	if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
884 		return -EIO;
885 
886 	if (is_encrypted(ni)) {
887 		ntfs_inode_warn(inode, "encrypted i/o not supported");
888 		return -EOPNOTSUPP;
889 	}
890 
891 #ifndef CONFIG_NTFS3_LZX_XPRESS
892 	if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) {
893 		ntfs_inode_warn(
894 			inode,
895 			"activate CONFIG_NTFS3_LZX_XPRESS to read external compressed files");
896 		return -EOPNOTSUPP;
897 	}
898 #endif
899 
900 	if (is_dedup(ni)) {
901 		ntfs_inode_warn(inode, "read deduplicated not supported");
902 		return -EOPNOTSUPP;
903 	}
904 
905 	return 0;
906 }
907 
908 /*
909  * ntfs_file_read_iter - file_operations::read_iter
910  */
ntfs_file_read_iter(struct kiocb * iocb,struct iov_iter * iter)911 static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
912 {
913 	struct file *file = iocb->ki_filp;
914 	struct inode *inode = file_inode(file);
915 	struct ntfs_inode *ni = ntfs_i(inode);
916 	ssize_t err;
917 
918 	err = check_read_restriction(inode);
919 	if (err)
920 		return err;
921 
922 	if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) {
923 		ntfs_inode_warn(inode, "direct i/o + compressed not supported");
924 		return -EOPNOTSUPP;
925 	}
926 
927 	return generic_file_read_iter(iocb, iter);
928 }
929 
930 /*
931  * ntfs_file_splice_read - file_operations::splice_read
932  */
ntfs_file_splice_read(struct file * in,loff_t * ppos,struct pipe_inode_info * pipe,size_t len,unsigned int flags)933 static ssize_t ntfs_file_splice_read(struct file *in, loff_t *ppos,
934 				     struct pipe_inode_info *pipe, size_t len,
935 				     unsigned int flags)
936 {
937 	struct inode *inode = file_inode(in);
938 	ssize_t err;
939 
940 	err = check_read_restriction(inode);
941 	if (err)
942 		return err;
943 
944 	return filemap_splice_read(in, ppos, pipe, len, flags);
945 }
946 
947 /*
948  * ntfs_get_frame_pages
949  *
950  * Return: Array of locked pages.
951  */
ntfs_get_frame_pages(struct address_space * mapping,pgoff_t index,struct page ** pages,u32 pages_per_frame,bool * frame_uptodate)952 static int ntfs_get_frame_pages(struct address_space *mapping, pgoff_t index,
953 				struct page **pages, u32 pages_per_frame,
954 				bool *frame_uptodate)
955 {
956 	gfp_t gfp_mask = mapping_gfp_mask(mapping);
957 	u32 npages;
958 
959 	*frame_uptodate = true;
960 
961 	for (npages = 0; npages < pages_per_frame; npages++, index++) {
962 		struct folio *folio;
963 
964 		folio = __filemap_get_folio(mapping, index,
965 					    FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
966 					    gfp_mask);
967 		if (IS_ERR(folio)) {
968 			while (npages--) {
969 				folio = page_folio(pages[npages]);
970 				folio_unlock(folio);
971 				folio_put(folio);
972 			}
973 
974 			return -ENOMEM;
975 		}
976 
977 		if (!folio_test_uptodate(folio))
978 			*frame_uptodate = false;
979 
980 		pages[npages] = &folio->page;
981 	}
982 
983 	return 0;
984 }
985 
986 /*
987  * ntfs_compress_write - Helper for ntfs_file_write_iter() (compressed files).
988  */
ntfs_compress_write(struct kiocb * iocb,struct iov_iter * from)989 static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from)
990 {
991 	int err;
992 	struct file *file = iocb->ki_filp;
993 	size_t count = iov_iter_count(from);
994 	loff_t pos = iocb->ki_pos;
995 	struct inode *inode = file_inode(file);
996 	loff_t i_size = i_size_read(inode);
997 	struct address_space *mapping = inode->i_mapping;
998 	struct ntfs_inode *ni = ntfs_i(inode);
999 	u64 valid = ni->i_valid;
1000 	struct ntfs_sb_info *sbi = ni->mi.sbi;
1001 	struct page *page, **pages = NULL;
1002 	size_t written = 0;
1003 	u8 frame_bits = NTFS_LZNT_CUNIT + sbi->cluster_bits;
1004 	u32 frame_size = 1u << frame_bits;
1005 	u32 pages_per_frame = frame_size >> PAGE_SHIFT;
1006 	u32 ip, off;
1007 	CLST frame;
1008 	u64 frame_vbo;
1009 	pgoff_t index;
1010 	bool frame_uptodate;
1011 	struct folio *folio;
1012 
1013 	if (frame_size < PAGE_SIZE) {
1014 		/*
1015 		 * frame_size == 8K if cluster 512
1016 		 * frame_size == 64K if cluster 4096
1017 		 */
1018 		ntfs_inode_warn(inode, "page size is bigger than frame size");
1019 		return -EOPNOTSUPP;
1020 	}
1021 
1022 	pages = kmalloc_array(pages_per_frame, sizeof(struct page *), GFP_NOFS);
1023 	if (!pages)
1024 		return -ENOMEM;
1025 
1026 	err = file_remove_privs(file);
1027 	if (err)
1028 		goto out;
1029 
1030 	err = file_update_time(file);
1031 	if (err)
1032 		goto out;
1033 
1034 	/* Zero range [valid : pos). */
1035 	while (valid < pos) {
1036 		CLST lcn, clen;
1037 
1038 		frame = valid >> frame_bits;
1039 		frame_vbo = valid & ~(frame_size - 1);
1040 		off = valid & (frame_size - 1);
1041 
1042 		err = attr_data_get_block(ni, frame << NTFS_LZNT_CUNIT, 1, &lcn,
1043 					  &clen, NULL, false);
1044 		if (err)
1045 			goto out;
1046 
1047 		if (lcn == SPARSE_LCN) {
1048 			ni->i_valid = valid =
1049 				frame_vbo + ((u64)clen << sbi->cluster_bits);
1050 			continue;
1051 		}
1052 
1053 		/* Load full frame. */
1054 		err = ntfs_get_frame_pages(mapping, frame_vbo >> PAGE_SHIFT,
1055 					   pages, pages_per_frame,
1056 					   &frame_uptodate);
1057 		if (err)
1058 			goto out;
1059 
1060 		if (!frame_uptodate && off) {
1061 			err = ni_read_frame(ni, frame_vbo, pages,
1062 					    pages_per_frame);
1063 			if (err) {
1064 				for (ip = 0; ip < pages_per_frame; ip++) {
1065 					page = pages[ip];
1066 					folio = page_folio(page);
1067 					folio_unlock(folio);
1068 					folio_put(folio);
1069 				}
1070 				goto out;
1071 			}
1072 		}
1073 
1074 		ip = off >> PAGE_SHIFT;
1075 		off = offset_in_page(valid);
1076 		for (; ip < pages_per_frame; ip++, off = 0) {
1077 			page = pages[ip];
1078 			folio = page_folio(page);
1079 			zero_user_segment(page, off, PAGE_SIZE);
1080 			flush_dcache_page(page);
1081 			folio_mark_uptodate(folio);
1082 		}
1083 
1084 		ni_lock(ni);
1085 		err = ni_write_frame(ni, pages, pages_per_frame);
1086 		ni_unlock(ni);
1087 
1088 		for (ip = 0; ip < pages_per_frame; ip++) {
1089 			page = pages[ip];
1090 			folio = page_folio(page);
1091 			folio_mark_uptodate(folio);
1092 			folio_unlock(folio);
1093 			folio_put(folio);
1094 		}
1095 
1096 		if (err)
1097 			goto out;
1098 
1099 		ni->i_valid = valid = frame_vbo + frame_size;
1100 	}
1101 
1102 	/* Copy user data [pos : pos + count). */
1103 	while (count) {
1104 		size_t copied, bytes;
1105 
1106 		off = pos & (frame_size - 1);
1107 		bytes = frame_size - off;
1108 		if (bytes > count)
1109 			bytes = count;
1110 
1111 		frame_vbo = pos & ~(frame_size - 1);
1112 		index = frame_vbo >> PAGE_SHIFT;
1113 
1114 		if (unlikely(fault_in_iov_iter_readable(from, bytes))) {
1115 			err = -EFAULT;
1116 			goto out;
1117 		}
1118 
1119 		/* Load full frame. */
1120 		err = ntfs_get_frame_pages(mapping, index, pages,
1121 					   pages_per_frame, &frame_uptodate);
1122 		if (err)
1123 			goto out;
1124 
1125 		if (!frame_uptodate) {
1126 			loff_t to = pos + bytes;
1127 
1128 			if (off || (to < i_size && (to & (frame_size - 1)))) {
1129 				err = ni_read_frame(ni, frame_vbo, pages,
1130 						    pages_per_frame);
1131 				if (err) {
1132 					for (ip = 0; ip < pages_per_frame;
1133 					     ip++) {
1134 						page = pages[ip];
1135 						folio = page_folio(page);
1136 						folio_unlock(folio);
1137 						folio_put(folio);
1138 					}
1139 					goto out;
1140 				}
1141 			}
1142 		}
1143 
1144 		WARN_ON(!bytes);
1145 		copied = 0;
1146 		ip = off >> PAGE_SHIFT;
1147 		off = offset_in_page(pos);
1148 
1149 		/* Copy user data to pages. */
1150 		for (;;) {
1151 			size_t cp, tail = PAGE_SIZE - off;
1152 
1153 			page = pages[ip];
1154 			cp = copy_page_from_iter_atomic(page, off,
1155 							min(tail, bytes), from);
1156 			flush_dcache_page(page);
1157 
1158 			copied += cp;
1159 			bytes -= cp;
1160 			if (!bytes || !cp)
1161 				break;
1162 
1163 			if (cp < tail) {
1164 				off += cp;
1165 			} else {
1166 				ip++;
1167 				off = 0;
1168 			}
1169 		}
1170 
1171 		ni_lock(ni);
1172 		err = ni_write_frame(ni, pages, pages_per_frame);
1173 		ni_unlock(ni);
1174 
1175 		for (ip = 0; ip < pages_per_frame; ip++) {
1176 			page = pages[ip];
1177 			ClearPageDirty(page);
1178 			folio = page_folio(page);
1179 			folio_mark_uptodate(folio);
1180 			folio_unlock(folio);
1181 			folio_put(folio);
1182 		}
1183 
1184 		if (err)
1185 			goto out;
1186 
1187 		/*
1188 		 * We can loop for a long time in here. Be nice and allow
1189 		 * us to schedule out to avoid softlocking if preempt
1190 		 * is disabled.
1191 		 */
1192 		cond_resched();
1193 
1194 		pos += copied;
1195 		written += copied;
1196 
1197 		count = iov_iter_count(from);
1198 	}
1199 
1200 out:
1201 	kfree(pages);
1202 
1203 	if (err < 0)
1204 		return err;
1205 
1206 	iocb->ki_pos += written;
1207 	if (iocb->ki_pos > ni->i_valid)
1208 		ni->i_valid = iocb->ki_pos;
1209 	if (iocb->ki_pos > i_size)
1210 		i_size_write(inode, iocb->ki_pos);
1211 
1212 	return written;
1213 }
1214 
1215 /*
1216  * check_write_restriction:
1217  * common code for ntfs_file_write_iter and ntfs_file_splice_write
1218  */
check_write_restriction(struct inode * inode)1219 static int check_write_restriction(struct inode *inode)
1220 {
1221 	struct ntfs_inode *ni = ntfs_i(inode);
1222 
1223 	if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
1224 		return -EIO;
1225 
1226 	if (is_encrypted(ni)) {
1227 		ntfs_inode_warn(inode, "encrypted i/o not supported");
1228 		return -EOPNOTSUPP;
1229 	}
1230 
1231 	if (is_dedup(ni)) {
1232 		ntfs_inode_warn(inode, "write into deduplicated not supported");
1233 		return -EOPNOTSUPP;
1234 	}
1235 
1236 	return 0;
1237 }
1238 
1239 /*
1240  * ntfs_file_write_iter - file_operations::write_iter
1241  */
ntfs_file_write_iter(struct kiocb * iocb,struct iov_iter * from)1242 static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
1243 {
1244 	struct file *file = iocb->ki_filp;
1245 	struct inode *inode = file_inode(file);
1246 	struct ntfs_inode *ni = ntfs_i(inode);
1247 	ssize_t ret;
1248 	int err;
1249 
1250 	if (!inode_trylock(inode)) {
1251 		if (iocb->ki_flags & IOCB_NOWAIT)
1252 			return -EAGAIN;
1253 		inode_lock(inode);
1254 	}
1255 
1256 	ret = check_write_restriction(inode);
1257 	if (ret)
1258 		goto out;
1259 
1260 	if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) {
1261 		ntfs_inode_warn(inode, "direct i/o + compressed not supported");
1262 		ret = -EOPNOTSUPP;
1263 		goto out;
1264 	}
1265 
1266 	ret = generic_write_checks(iocb, from);
1267 	if (ret <= 0)
1268 		goto out;
1269 
1270 	err = file_modified(iocb->ki_filp);
1271 	if (err) {
1272 		ret = err;
1273 		goto out;
1274 	}
1275 
1276 	if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) {
1277 		/* Should never be here, see ntfs_file_open(). */
1278 		ret = -EOPNOTSUPP;
1279 		goto out;
1280 	}
1281 
1282 	ret = ntfs_extend(inode, iocb->ki_pos, ret, file);
1283 	if (ret)
1284 		goto out;
1285 
1286 	ret = is_compressed(ni) ? ntfs_compress_write(iocb, from) :
1287 				  __generic_file_write_iter(iocb, from);
1288 
1289 out:
1290 	inode_unlock(inode);
1291 
1292 	if (ret > 0)
1293 		ret = generic_write_sync(iocb, ret);
1294 
1295 	return ret;
1296 }
1297 
1298 /*
1299  * ntfs_file_open - file_operations::open
1300  */
ntfs_file_open(struct inode * inode,struct file * file)1301 int ntfs_file_open(struct inode *inode, struct file *file)
1302 {
1303 	struct ntfs_inode *ni = ntfs_i(inode);
1304 
1305 	if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
1306 		return -EIO;
1307 
1308 	if (unlikely((is_compressed(ni) || is_encrypted(ni)) &&
1309 		     (file->f_flags & O_DIRECT))) {
1310 		return -EOPNOTSUPP;
1311 	}
1312 
1313 	/* Decompress "external compressed" file if opened for rw. */
1314 	if ((ni->ni_flags & NI_FLAG_COMPRESSED_MASK) &&
1315 	    (file->f_flags & (O_WRONLY | O_RDWR | O_TRUNC))) {
1316 #ifdef CONFIG_NTFS3_LZX_XPRESS
1317 		int err = ni_decompress_file(ni);
1318 
1319 		if (err)
1320 			return err;
1321 #else
1322 		ntfs_inode_warn(
1323 			inode,
1324 			"activate CONFIG_NTFS3_LZX_XPRESS to write external compressed files");
1325 		return -EOPNOTSUPP;
1326 #endif
1327 	}
1328 
1329 	return generic_file_open(inode, file);
1330 }
1331 
1332 /*
1333  * ntfs_file_release - file_operations::release
1334  */
ntfs_file_release(struct inode * inode,struct file * file)1335 static int ntfs_file_release(struct inode *inode, struct file *file)
1336 {
1337 	struct ntfs_inode *ni = ntfs_i(inode);
1338 	struct ntfs_sb_info *sbi = ni->mi.sbi;
1339 	int err = 0;
1340 
1341 	/* If we are last writer on the inode, drop the block reservation. */
1342 	if (sbi->options->prealloc &&
1343 	    ((file->f_mode & FMODE_WRITE) &&
1344 	     atomic_read(&inode->i_writecount) == 1)
1345 	   /*
1346 	    * The only file when inode->i_fop = &ntfs_file_operations and
1347 	    * init_rwsem(&ni->file.run_lock) is not called explicitly is MFT.
1348 	    *
1349 	    * Add additional check here.
1350 	    */
1351 	    && inode->i_ino != MFT_REC_MFT) {
1352 		ni_lock(ni);
1353 		down_write(&ni->file.run_lock);
1354 
1355 		err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run,
1356 				    i_size_read(inode), &ni->i_valid, false,
1357 				    NULL);
1358 
1359 		up_write(&ni->file.run_lock);
1360 		ni_unlock(ni);
1361 	}
1362 	return err;
1363 }
1364 
1365 /*
1366  * ntfs_fiemap - inode_operations::fiemap
1367  */
ntfs_fiemap(struct inode * inode,struct fiemap_extent_info * fieinfo,__u64 start,__u64 len)1368 int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1369 		__u64 start, __u64 len)
1370 {
1371 	int err;
1372 	struct ntfs_inode *ni = ntfs_i(inode);
1373 
1374 	err = fiemap_prep(inode, fieinfo, start, &len, ~FIEMAP_FLAG_XATTR);
1375 	if (err)
1376 		return err;
1377 
1378 	ni_lock(ni);
1379 
1380 	err = ni_fiemap(ni, fieinfo, start, len);
1381 
1382 	ni_unlock(ni);
1383 
1384 	return err;
1385 }
1386 
1387 /*
1388  * ntfs_file_splice_write - file_operations::splice_write
1389  */
ntfs_file_splice_write(struct pipe_inode_info * pipe,struct file * file,loff_t * ppos,size_t len,unsigned int flags)1390 static ssize_t ntfs_file_splice_write(struct pipe_inode_info *pipe,
1391 				      struct file *file, loff_t *ppos,
1392 				      size_t len, unsigned int flags)
1393 {
1394 	ssize_t err;
1395 	struct inode *inode = file_inode(file);
1396 
1397 	err = check_write_restriction(inode);
1398 	if (err)
1399 		return err;
1400 
1401 	return iter_file_splice_write(pipe, file, ppos, len, flags);
1402 }
1403 
1404 // clang-format off
1405 const struct inode_operations ntfs_file_inode_operations = {
1406 	.getattr	= ntfs_getattr,
1407 	.setattr	= ntfs_setattr,
1408 	.listxattr	= ntfs_listxattr,
1409 	.get_acl	= ntfs_get_acl,
1410 	.set_acl	= ntfs_set_acl,
1411 	.fiemap		= ntfs_fiemap,
1412 	.fileattr_get	= ntfs_fileattr_get,
1413 	.fileattr_set	= ntfs_fileattr_set,
1414 };
1415 
1416 const struct file_operations ntfs_file_operations = {
1417 	.llseek		= generic_file_llseek,
1418 	.read_iter	= ntfs_file_read_iter,
1419 	.write_iter	= ntfs_file_write_iter,
1420 	.unlocked_ioctl = ntfs_ioctl,
1421 #ifdef CONFIG_COMPAT
1422 	.compat_ioctl	= ntfs_compat_ioctl,
1423 #endif
1424 	.splice_read	= ntfs_file_splice_read,
1425 	.splice_write	= ntfs_file_splice_write,
1426 	.mmap		= ntfs_file_mmap,
1427 	.open		= ntfs_file_open,
1428 	.fsync		= generic_file_fsync,
1429 	.fallocate	= ntfs_fallocate,
1430 	.release	= ntfs_file_release,
1431 };
1432 
1433 #if IS_ENABLED(CONFIG_NTFS_FS)
1434 const struct file_operations ntfs_legacy_file_operations = {
1435 	.llseek		= generic_file_llseek,
1436 	.read_iter	= ntfs_file_read_iter,
1437 	.splice_read	= ntfs_file_splice_read,
1438 	.open		= ntfs_file_open,
1439 	.release	= ntfs_file_release,
1440 };
1441 #endif
1442 // clang-format on
1443