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Merge tag 'perf-urgent-2022-08-06' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-block.git] / fs / ntfs3 / inode.c
CommitLineData
82cae269
KK		 1// SPDX-License-Identifier: GPL-2.0
2/*
3 *
4 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
5 *
6 */
7
82cae269
KK		 8#include <linux/buffer_head.h>
9#include <linux/fs.h>
82cae269
KK		 10#include <linux/mpage.h>
11#include <linux/namei.h>
12#include <linux/nls.h>
13#include <linux/uio.h>
82cae269
KK		 14#include <linux/writeback.h>
15
16#include "debug.h"
17#include "ntfs.h"
18#include "ntfs_fs.h"
19
20/*
e8b8e97f 21 * ntfs_read_mft - Read record and parses MFT.
82cae269
KK		 22 */
23static struct inode *ntfs_read_mft(struct inode *inode,
24 const struct cpu_str *name,
25 const struct MFT_REF *ref)
26{
27 int err = 0;
28 struct ntfs_inode *ni = ntfs_i(inode);
29 struct super_block *sb = inode->i_sb;
30 struct ntfs_sb_info *sbi = sb->s_fs_info;
31 mode_t mode = 0;
32 struct ATTR_STD_INFO5 *std5 = NULL;
33 struct ATTR_LIST_ENTRY *le;
34 struct ATTRIB *attr;
35 bool is_match = false;
36 bool is_root = false;
37 bool is_dir;
38 unsigned long ino = inode->i_ino;
39 u32 rp_fa = 0, asize, t32;
40 u16 roff, rsize, names = 0;
41 const struct ATTR_FILE_NAME *fname = NULL;
42 const struct INDEX_ROOT *root;
43 struct REPARSE_DATA_BUFFER rp; // 0x18 bytes
44 u64 t64;
45 struct MFT_REC *rec;
46 struct runs_tree *run;
47
48 inode->i_op = NULL;
49 /* Setup 'uid' and 'gid' */
564c97bd
KA		 50 inode->i_uid = sbi->options->fs_uid;
51 inode->i_gid = sbi->options->fs_gid;
82cae269
KK		 52
53 err = mi_init(&ni->mi, sbi, ino);
54 if (err)
55 goto out;
56
57 if (!sbi->mft.ni && ino == MFT_REC_MFT && !sb->s_root) {
58 t64 = sbi->mft.lbo >> sbi->cluster_bits;
59 t32 = bytes_to_cluster(sbi, MFT_REC_VOL * sbi->record_size);
60 sbi->mft.ni = ni;
61 init_rwsem(&ni->file.run_lock);
62
63 if (!run_add_entry(&ni->file.run, 0, t64, t32, true)) {
64 err = -ENOMEM;
65 goto out;
66 }
67 }
68
69 err = mi_read(&ni->mi, ino == MFT_REC_MFT);
70
71 if (err)
72 goto out;
73
74 rec = ni->mi.mrec;
75
76 if (sbi->flags & NTFS_FLAGS_LOG_REPLAYING) {
77 ;
78 } else if (ref->seq != rec->seq) {
79 err = -EINVAL;
80 ntfs_err(sb, "MFT: r=%lx, expect seq=%x instead of %x!", ino,
81 le16_to_cpu(ref->seq), le16_to_cpu(rec->seq));
82 goto out;
83 } else if (!is_rec_inuse(rec)) {
84 err = -EINVAL;
85 ntfs_err(sb, "Inode r=%x is not in use!", (u32)ino);
86 goto out;
87 }
88
89 if (le32_to_cpu(rec->total) != sbi->record_size) {
d3624466 90 /* Bad inode? */
82cae269
KK		 91 err = -EINVAL;
92 goto out;
93 }
94
95 if (!is_rec_base(rec))
96 goto Ok;
97
e8b8e97f 98 /* Record should contain $I30 root. */
82cae269
KK		 99 is_dir = rec->flags & RECORD_FLAG_DIR;
100
101 inode->i_generation = le16_to_cpu(rec->seq);
102
e8b8e97f 103 /* Enumerate all struct Attributes MFT. */
82cae269
KK		 104 le = NULL;
105 attr = NULL;
106
107 /*
e8b8e97f 108 * To reduce tab pressure use goto instead of
82cae269
KK		 109 * while( (attr = ni_enum_attr_ex(ni, attr, &le, NULL) ))
110 */
111next_attr:
112 run = NULL;
113 err = -EINVAL;
114 attr = ni_enum_attr_ex(ni, attr, &le, NULL);
115 if (!attr)
116 goto end_enum;
117
118 if (le && le->vcn) {
e8b8e97f 119 /* This is non primary attribute segment. Ignore if not MFT. */
82cae269
KK		 120 if (ino != MFT_REC_MFT || attr->type != ATTR_DATA)
121 goto next_attr;
122
123 run = &ni->file.run;
124 asize = le32_to_cpu(attr->size);
125 goto attr_unpack_run;
126 }
127
128 roff = attr->non_res ? 0 : le16_to_cpu(attr->res.data_off);
129 rsize = attr->non_res ? 0 : le32_to_cpu(attr->res.data_size);
130 asize = le32_to_cpu(attr->size);
131
132 switch (attr->type) {
133 case ATTR_STD:
134 if (attr->non_res ||
135 asize < sizeof(struct ATTR_STD_INFO) + roff ||
136 rsize < sizeof(struct ATTR_STD_INFO))
137 goto out;
138
139 if (std5)
140 goto next_attr;
141
142 std5 = Add2Ptr(attr, roff);
143
144#ifdef STATX_BTIME
145 nt2kernel(std5->cr_time, &ni->i_crtime);
146#endif
147 nt2kernel(std5->a_time, &inode->i_atime);
148 nt2kernel(std5->c_time, &inode->i_ctime);
149 nt2kernel(std5->m_time, &inode->i_mtime);
150
151 ni->std_fa = std5->fa;
152
153 if (asize >= sizeof(struct ATTR_STD_INFO5) + roff &&
154 rsize >= sizeof(struct ATTR_STD_INFO5))
155 ni->std_security_id = std5->security_id;
156 goto next_attr;
157
158 case ATTR_LIST:
159 if (attr->name_len || le || ino == MFT_REC_LOG)
160 goto out;
161
162 err = ntfs_load_attr_list(ni, attr);
163 if (err)
164 goto out;
165
166 le = NULL;
167 attr = NULL;
168 goto next_attr;
169
170 case ATTR_NAME:
171 if (attr->non_res || asize < SIZEOF_ATTRIBUTE_FILENAME + roff ||
172 rsize < SIZEOF_ATTRIBUTE_FILENAME)
173 goto out;
174
175 fname = Add2Ptr(attr, roff);
176 if (fname->type == FILE_NAME_DOS)
177 goto next_attr;
178
179 names += 1;
180 if (name && name->len == fname->name_len &&
181 !ntfs_cmp_names_cpu(name, (struct le_str *)&fname->name_len,
182 NULL, false))
183 is_match = true;
184
185 goto next_attr;
186
187 case ATTR_DATA:
188 if (is_dir) {
e8b8e97f 189 /* Ignore data attribute in dir record. */
82cae269
KK		 190 goto next_attr;
191 }
192
193 if (ino == MFT_REC_BADCLUST && !attr->non_res)
194 goto next_attr;
195
196 if (attr->name_len &&
197 ((ino != MFT_REC_BADCLUST || !attr->non_res ||
198 attr->name_len != ARRAY_SIZE(BAD_NAME) ||
199 memcmp(attr_name(attr), BAD_NAME, sizeof(BAD_NAME))) &&
200 (ino != MFT_REC_SECURE || !attr->non_res ||
201 attr->name_len != ARRAY_SIZE(SDS_NAME) ||
202 memcmp(attr_name(attr), SDS_NAME, sizeof(SDS_NAME))))) {
e8b8e97f 203 /* File contains stream attribute. Ignore it. */
82cae269
KK		 204 goto next_attr;
205 }
206
207 if (is_attr_sparsed(attr))
208 ni->std_fa |= FILE_ATTRIBUTE_SPARSE_FILE;
209 else
210 ni->std_fa &= ~FILE_ATTRIBUTE_SPARSE_FILE;
211
212 if (is_attr_compressed(attr))
213 ni->std_fa |= FILE_ATTRIBUTE_COMPRESSED;
214 else
215 ni->std_fa &= ~FILE_ATTRIBUTE_COMPRESSED;
216
217 if (is_attr_encrypted(attr))
218 ni->std_fa |= FILE_ATTRIBUTE_ENCRYPTED;
219 else
220 ni->std_fa &= ~FILE_ATTRIBUTE_ENCRYPTED;
221
222 if (!attr->non_res) {
223 ni->i_valid = inode->i_size = rsize;
224 inode_set_bytes(inode, rsize);
82cae269
KK		 225 }
226
564c97bd 227 mode = S_IFREG | (0777 & sbi->options->fs_fmask_inv);
82cae269
KK		 228
229 if (!attr->non_res) {
230 ni->ni_flags |= NI_FLAG_RESIDENT;
231 goto next_attr;
232 }
233
234 inode_set_bytes(inode, attr_ondisk_size(attr));
235
236 ni->i_valid = le64_to_cpu(attr->nres.valid_size);
237 inode->i_size = le64_to_cpu(attr->nres.data_size);
238 if (!attr->nres.alloc_size)
239 goto next_attr;
240
241 run = ino == MFT_REC_BITMAP ? &sbi->used.bitmap.run
242 : &ni->file.run;
243 break;
244
245 case ATTR_ROOT:
246 if (attr->non_res)
247 goto out;
248
249 root = Add2Ptr(attr, roff);
250 is_root = true;
251
252 if (attr->name_len != ARRAY_SIZE(I30_NAME) ||
253 memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME)))
254 goto next_attr;
255
256 if (root->type != ATTR_NAME ||
257 root->rule != NTFS_COLLATION_TYPE_FILENAME)
258 goto out;
259
260 if (!is_dir)
261 goto next_attr;
262
263 ni->ni_flags |= NI_FLAG_DIR;
264
265 err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30);
266 if (err)
267 goto out;
268
269 mode = sb->s_root
564c97bd 270 ? (S_IFDIR | (0777 & sbi->options->fs_dmask_inv))
82cae269
KK		 271 : (S_IFDIR | 0777);
272 goto next_attr;
273
274 case ATTR_ALLOC:
275 if (!is_root || attr->name_len != ARRAY_SIZE(I30_NAME) ||
276 memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME)))
277 goto next_attr;
278
279 inode->i_size = le64_to_cpu(attr->nres.data_size);
280 ni->i_valid = le64_to_cpu(attr->nres.valid_size);
281 inode_set_bytes(inode, le64_to_cpu(attr->nres.alloc_size));
282
283 run = &ni->dir.alloc_run;
284 break;
285
286 case ATTR_BITMAP:
287 if (ino == MFT_REC_MFT) {
288 if (!attr->non_res)
289 goto out;
290#ifndef CONFIG_NTFS3_64BIT_CLUSTER
291 /* 0x20000000 = 2^32 / 8 */
292 if (le64_to_cpu(attr->nres.alloc_size) >= 0x20000000)
293 goto out;
294#endif
295 run = &sbi->mft.bitmap.run;
296 break;
297 } else if (is_dir && attr->name_len == ARRAY_SIZE(I30_NAME) &&
298 !memcmp(attr_name(attr), I30_NAME,
299 sizeof(I30_NAME)) &&
300 attr->non_res) {
301 run = &ni->dir.bitmap_run;
302 break;
303 }
304 goto next_attr;
305
306 case ATTR_REPARSE:
307 if (attr->name_len)
308 goto next_attr;
309
310 rp_fa = ni_parse_reparse(ni, attr, &rp);
311 switch (rp_fa) {
312 case REPARSE_LINK:
22b05f1a
KK		 313 /*
314 * Normal symlink.
315 * Assume one unicode symbol == one utf8.
316 */
317 inode->i_size = le16_to_cpu(rp.SymbolicLinkReparseBuffer
318 .PrintNameLength) /
319 sizeof(u16);
82cae269 320
82cae269
KK		 321 ni->i_valid = inode->i_size;
322
e8b8e97f 323 /* Clear directory bit. */
82cae269
KK		 324 if (ni->ni_flags & NI_FLAG_DIR) {
325 indx_clear(&ni->dir);
326 memset(&ni->dir, 0, sizeof(ni->dir));
327 ni->ni_flags &= ~NI_FLAG_DIR;
328 } else {
329 run_close(&ni->file.run);
330 }
331 mode = S_IFLNK | 0777;
332 is_dir = false;
333 if (attr->non_res) {
334 run = &ni->file.run;
e8b8e97f 335 goto attr_unpack_run; // Double break.
82cae269
KK		 336 }
337 break;
338
339 case REPARSE_COMPRESSED:
340 break;
341
342 case REPARSE_DEDUPLICATED:
343 break;
344 }
345 goto next_attr;
346
347 case ATTR_EA_INFO:
348 if (!attr->name_len &&
349 resident_data_ex(attr, sizeof(struct EA_INFO))) {
350 ni->ni_flags |= NI_FLAG_EA;
351 /*
352 * ntfs_get_wsl_perm updates inode->i_uid, inode->i_gid, inode->i_mode
353 */
354 inode->i_mode = mode;
355 ntfs_get_wsl_perm(inode);
356 mode = inode->i_mode;
357 }
358 goto next_attr;
359
360 default:
361 goto next_attr;
362 }
363
364attr_unpack_run:
365 roff = le16_to_cpu(attr->nres.run_off);
366
367 t64 = le64_to_cpu(attr->nres.svcn);
368 err = run_unpack_ex(run, sbi, ino, t64, le64_to_cpu(attr->nres.evcn),
369 t64, Add2Ptr(attr, roff), asize - roff);
370 if (err < 0)
371 goto out;
372 err = 0;
373 goto next_attr;
374
375end_enum:
376
377 if (!std5)
378 goto out;
379
380 if (!is_match && name) {
e8b8e97f 381 /* Reuse rec as buffer for ascii name. */
82cae269
KK		 382 err = -ENOENT;
383 goto out;
384 }
385
386 if (std5->fa & FILE_ATTRIBUTE_READONLY)
387 mode &= ~0222;
388
389 if (!names) {
390 err = -EINVAL;
391 goto out;
392 }
393
78ab59fe
KK		 394 if (names != le16_to_cpu(rec->hard_links)) {
395 /* Correct minor error on the fly. Do not mark inode as dirty. */
396 rec->hard_links = cpu_to_le16(names);
397 ni->mi.dirty = true;
398 }
399
82cae269
KK		 400 set_nlink(inode, names);
401
402 if (S_ISDIR(mode)) {
403 ni->std_fa |= FILE_ATTRIBUTE_DIRECTORY;
404
405 /*
e8b8e97f 406 * Dot and dot-dot should be included in count but was not
82cae269 407 * included in enumeration.
e8b8e97f 408 * Usually a hard links to directories are disabled.
82cae269
KK		 409 */
410 inode->i_op = &ntfs_dir_inode_operations;
411 inode->i_fop = &ntfs_dir_operations;
412 ni->i_valid = 0;
413 } else if (S_ISLNK(mode)) {
414 ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY;
415 inode->i_op = &ntfs_link_inode_operations;
416 inode->i_fop = NULL;
22b05f1a 417 inode_nohighmem(inode);
82cae269
KK		 418 } else if (S_ISREG(mode)) {
419 ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY;
420 inode->i_op = &ntfs_file_inode_operations;
421 inode->i_fop = &ntfs_file_operations;
422 inode->i_mapping->a_ops =
423 is_compressed(ni) ? &ntfs_aops_cmpr : &ntfs_aops;
424 if (ino != MFT_REC_MFT)
425 init_rwsem(&ni->file.run_lock);
426 } else if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISFIFO(mode) ||
427 S_ISSOCK(mode)) {
428 inode->i_op = &ntfs_special_inode_operations;
429 init_special_inode(inode, mode, inode->i_rdev);
430 } else if (fname && fname->home.low == cpu_to_le32(MFT_REC_EXTEND) &&
431 fname->home.seq == cpu_to_le16(MFT_REC_EXTEND)) {
e8b8e97f 432 /* Records in $Extend are not a files or general directories. */
82cae269
KK		 433 } else {
434 err = -EINVAL;
435 goto out;
436 }
437
564c97bd 438 if ((sbi->options->sys_immutable &&
82cae269
KK		 439 (std5->fa & FILE_ATTRIBUTE_SYSTEM)) &&
440 !S_ISFIFO(mode) && !S_ISSOCK(mode) && !S_ISLNK(mode)) {
441 inode->i_flags |= S_IMMUTABLE;
442 } else {
443 inode->i_flags &= ~S_IMMUTABLE;
444 }
445
446 inode->i_mode = mode;
447 if (!(ni->ni_flags & NI_FLAG_EA)) {
e8b8e97f 448 /* If no xattr then no security (stored in xattr). */
82cae269
KK		 449 inode->i_flags |= S_NOSEC;
450 }
451
452Ok:
453 if (ino == MFT_REC_MFT && !sb->s_root)
454 sbi->mft.ni = NULL;
455
456 unlock_new_inode(inode);
457
458 return inode;
459
460out:
461 if (ino == MFT_REC_MFT && !sb->s_root)
462 sbi->mft.ni = NULL;
463
464 iget_failed(inode);
465 return ERR_PTR(err);
466}
467
e8b8e97f
KA		 468/*
469 * ntfs_test_inode
470 *
471 * Return: 1 if match.
472 */
82cae269
KK		 473static int ntfs_test_inode(struct inode *inode, void *data)
474{
475 struct MFT_REF *ref = data;
476
477 return ino_get(ref) == inode->i_ino;
478}
479
480static int ntfs_set_inode(struct inode *inode, void *data)
481{
482 const struct MFT_REF *ref = data;
483
484 inode->i_ino = ino_get(ref);
485 return 0;
486}
487
488struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
489 const struct cpu_str *name)
490{
491 struct inode *inode;
492
493 inode = iget5_locked(sb, ino_get(ref), ntfs_test_inode, ntfs_set_inode,
494 (void *)ref);
495 if (unlikely(!inode))
496 return ERR_PTR(-ENOMEM);
497
498 /* If this is a freshly allocated inode, need to read it now. */
499 if (inode->i_state & I_NEW)
500 inode = ntfs_read_mft(inode, name, ref);
501 else if (ref->seq != ntfs_i(inode)->mi.mrec->seq) {
e8b8e97f 502 /* Inode overlaps? */
82cae269
KK		 503 make_bad_inode(inode);
504 }
505
506 return inode;
507}
508
509enum get_block_ctx {
510 GET_BLOCK_GENERAL = 0,
511 GET_BLOCK_WRITE_BEGIN = 1,
512 GET_BLOCK_DIRECT_IO_R = 2,
513 GET_BLOCK_DIRECT_IO_W = 3,
514 GET_BLOCK_BMAP = 4,
515};
516
517static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo,
518 struct buffer_head *bh, int create,
519 enum get_block_ctx ctx)
520{
521 struct super_block *sb = inode->i_sb;
522 struct ntfs_sb_info *sbi = sb->s_fs_info;
523 struct ntfs_inode *ni = ntfs_i(inode);
524 struct page *page = bh->b_page;
525 u8 cluster_bits = sbi->cluster_bits;
526 u32 block_size = sb->s_blocksize;
527 u64 bytes, lbo, valid;
528 u32 off;
529 int err;
530 CLST vcn, lcn, len;
531 bool new;
532
e8b8e97f 533 /* Clear previous state. */
82cae269
KK		 534 clear_buffer_new(bh);
535 clear_buffer_uptodate(bh);
536
e8b8e97f 537 /* Direct write uses 'create=0'. */
82cae269 538 if (!create && vbo >= ni->i_valid) {
e8b8e97f 539 /* Out of valid. */
82cae269
KK		 540 return 0;
541 }
542
543 if (vbo >= inode->i_size) {
e8b8e97f 544 /* Out of size. */
82cae269
KK		 545 return 0;
546 }
547
548 if (is_resident(ni)) {
549 ni_lock(ni);
550 err = attr_data_read_resident(ni, page);
551 ni_unlock(ni);
552
553 if (!err)
554 set_buffer_uptodate(bh);
555 bh->b_size = block_size;
556 return err;
557 }
558
559 vcn = vbo >> cluster_bits;
560 off = vbo & sbi->cluster_mask;
561 new = false;
562
563 err = attr_data_get_block(ni, vcn, 1, &lcn, &len, create ? &new : NULL);
564 if (err)
565 goto out;
566
567 if (!len)
568 return 0;
569
570 bytes = ((u64)len << cluster_bits) - off;
571
572 if (lcn == SPARSE_LCN) {
573 if (!create) {
574 if (bh->b_size > bytes)
575 bh->b_size = bytes;
576 return 0;
577 }
578 WARN_ON(1);
579 }
580
581 if (new) {
582 set_buffer_new(bh);
583 if ((len << cluster_bits) > block_size)
584 ntfs_sparse_cluster(inode, page, vcn, len);
585 }
586
587 lbo = ((u64)lcn << cluster_bits) + off;
588
589 set_buffer_mapped(bh);
590 bh->b_bdev = sb->s_bdev;
591 bh->b_blocknr = lbo >> sb->s_blocksize_bits;
592
593 valid = ni->i_valid;
594
595 if (ctx == GET_BLOCK_DIRECT_IO_W) {
e8b8e97f 596 /* ntfs_direct_IO will update ni->i_valid. */
82cae269
KK		 597 if (vbo >= valid)
598 set_buffer_new(bh);
599 } else if (create) {
d3624466 600 /* Normal write. */
82cae269
KK		 601 if (bytes > bh->b_size)
602 bytes = bh->b_size;
603
604 if (vbo >= valid)
605 set_buffer_new(bh);
606
607 if (vbo + bytes > valid) {
608 ni->i_valid = vbo + bytes;
609 mark_inode_dirty(inode);
610 }
611 } else if (vbo >= valid) {
e8b8e97f
KA		 612 /* Read out of valid data. */
613 /* Should never be here 'cause already checked. */
82cae269
KK		 614 clear_buffer_mapped(bh);
615 } else if (vbo + bytes <= valid) {
e8b8e97f 616 /* Normal read. */
82cae269 617 } else if (vbo + block_size <= valid) {
e8b8e97f 618 /* Normal short read. */
82cae269
KK		 619 bytes = block_size;
620 } else {
621 /*
e8b8e97f 622 * Read across valid size: vbo < valid && valid < vbo + block_size
82cae269
KK		 623 */
624 bytes = block_size;
625
626 if (page) {
627 u32 voff = valid - vbo;
628
629 bh->b_size = block_size;
630 off = vbo & (PAGE_SIZE - 1);
631 set_bh_page(bh, page, off);
1420c4a5 632 ll_rw_block(REQ_OP_READ, 1, &bh);
82cae269
KK		 633 wait_on_buffer(bh);
634 if (!buffer_uptodate(bh)) {
635 err = -EIO;
636 goto out;
637 }
638 zero_user_segment(page, off + voff, off + block_size);
639 }
640 }
641
642 if (bh->b_size > bytes)
643 bh->b_size = bytes;
644
645#ifndef __LP64__
646 if (ctx == GET_BLOCK_DIRECT_IO_W || ctx == GET_BLOCK_DIRECT_IO_R) {
647 static_assert(sizeof(size_t) < sizeof(loff_t));
648 if (bytes > 0x40000000u)
649 bh->b_size = 0x40000000u;
650 }
651#endif
652
653 return 0;
654
655out:
656 return err;
657}
658
659int ntfs_get_block(struct inode *inode, sector_t vbn,
660 struct buffer_head *bh_result, int create)
661{
662 return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits,
663 bh_result, create, GET_BLOCK_GENERAL);
664}
665
666static int ntfs_get_block_bmap(struct inode *inode, sector_t vsn,
667 struct buffer_head *bh_result, int create)
668{
669 return ntfs_get_block_vbo(inode,
670 (u64)vsn << inode->i_sb->s_blocksize_bits,
671 bh_result, create, GET_BLOCK_BMAP);
672}
673
674static sector_t ntfs_bmap(struct address_space *mapping, sector_t block)
675{
676 return generic_block_bmap(mapping, block, ntfs_get_block_bmap);
677}
678
f132ab7d 679static int ntfs_read_folio(struct file *file, struct folio *folio)
82cae269 680{
f132ab7d 681 struct page *page = &folio->page;
82cae269
KK		 682 int err;
683 struct address_space *mapping = page->mapping;
684 struct inode *inode = mapping->host;
685 struct ntfs_inode *ni = ntfs_i(inode);
686
687 if (is_resident(ni)) {
688 ni_lock(ni);
689 err = attr_data_read_resident(ni, page);
690 ni_unlock(ni);
691 if (err != E_NTFS_NONRESIDENT) {
692 unlock_page(page);
693 return err;
694 }
695 }
696
697 if (is_compressed(ni)) {
698 ni_lock(ni);
699 err = ni_readpage_cmpr(ni, page);
700 ni_unlock(ni);
701 return err;
702 }
703
e8b8e97f 704 /* Normal + sparse files. */
f132ab7d 705 return mpage_read_folio(folio, ntfs_get_block);
82cae269
KK		 706}
707
708static void ntfs_readahead(struct readahead_control *rac)
709{
710 struct address_space *mapping = rac->mapping;
711 struct inode *inode = mapping->host;
712 struct ntfs_inode *ni = ntfs_i(inode);
713 u64 valid;
714 loff_t pos;
715
716 if (is_resident(ni)) {
e8b8e97f 717 /* No readahead for resident. */
82cae269
KK		 718 return;
719 }
720
721 if (is_compressed(ni)) {
e8b8e97f 722 /* No readahead for compressed. */
82cae269
KK		 723 return;
724 }
725
726 valid = ni->i_valid;
727 pos = readahead_pos(rac);
728
729 if (valid < i_size_read(inode) && pos <= valid &&
730 valid < pos + readahead_length(rac)) {
e8b8e97f 731 /* Range cross 'valid'. Read it page by page. */
82cae269
KK		 732 return;
733 }
734
735 mpage_readahead(rac, ntfs_get_block);
736}
737
738static int ntfs_get_block_direct_IO_R(struct inode *inode, sector_t iblock,
739 struct buffer_head *bh_result, int create)
740{
741 return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits,
742 bh_result, create, GET_BLOCK_DIRECT_IO_R);
743}
744
745static int ntfs_get_block_direct_IO_W(struct inode *inode, sector_t iblock,
746 struct buffer_head *bh_result, int create)
747{
748 return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits,
749 bh_result, create, GET_BLOCK_DIRECT_IO_W);
750}
751
752static ssize_t ntfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
753{
754 struct file *file = iocb->ki_filp;
755 struct address_space *mapping = file->f_mapping;
756 struct inode *inode = mapping->host;
757 struct ntfs_inode *ni = ntfs_i(inode);
758 loff_t vbo = iocb->ki_pos;
759 loff_t end;
760 int wr = iov_iter_rw(iter) & WRITE;
52e00ea6 761 size_t iter_count = iov_iter_count(iter);
82cae269
KK		 762 loff_t valid;
763 ssize_t ret;
764
765 if (is_resident(ni)) {
e8b8e97f 766 /* Switch to buffered write. */
82cae269
KK		 767 ret = 0;
768 goto out;
769 }
770
771 ret = blockdev_direct_IO(iocb, inode, iter,
772 wr ? ntfs_get_block_direct_IO_W
773 : ntfs_get_block_direct_IO_R);
774
52e00ea6
KK		 775 if (ret > 0)
776 end = vbo + ret;
777 else if (wr && ret == -EIOCBQUEUED)
778 end = vbo + iter_count;
779 else
82cae269
KK		 780 goto out;
781
82cae269
KK		 782 valid = ni->i_valid;
783 if (wr) {
784 if (end > valid && !S_ISBLK(inode->i_mode)) {
785 ni->i_valid = end;
786 mark_inode_dirty(inode);
787 }
788 } else if (vbo < valid && valid < end) {
e8b8e97f 789 /* Fix page. */
82cae269
KK		 790 iov_iter_revert(iter, end - valid);
791 iov_iter_zero(end - valid, iter);
792 }
793
794out:
795 return ret;
796}
797
798int ntfs_set_size(struct inode *inode, u64 new_size)
799{
800 struct super_block *sb = inode->i_sb;
801 struct ntfs_sb_info *sbi = sb->s_fs_info;
802 struct ntfs_inode *ni = ntfs_i(inode);
803 int err;
804
e8b8e97f 805 /* Check for maximum file size. */
82cae269
KK		 806 if (is_sparsed(ni) || is_compressed(ni)) {
807 if (new_size > sbi->maxbytes_sparse) {
808 err = -EFBIG;
809 goto out;
810 }
811 } else if (new_size > sbi->maxbytes) {
812 err = -EFBIG;
813 goto out;
814 }
815
816 ni_lock(ni);
817 down_write(&ni->file.run_lock);
818
819 err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size,
820 &ni->i_valid, true, NULL);
821
822 up_write(&ni->file.run_lock);
823 ni_unlock(ni);
824
825 mark_inode_dirty(inode);
826
827out:
828 return err;
829}
830
831static int ntfs_writepage(struct page *page, struct writeback_control *wbc)
832{
833 struct address_space *mapping = page->mapping;
834 struct inode *inode = mapping->host;
835 struct ntfs_inode *ni = ntfs_i(inode);
836 int err;
837
838 if (is_resident(ni)) {
839 ni_lock(ni);
840 err = attr_data_write_resident(ni, page);
841 ni_unlock(ni);
842 if (err != E_NTFS_NONRESIDENT) {
843 unlock_page(page);
844 return err;
845 }
846 }
847
848 return block_write_full_page(page, ntfs_get_block, wbc);
849}
850
851static int ntfs_writepages(struct address_space *mapping,
852 struct writeback_control *wbc)
853{
e8b8e97f 854 /* Redirect call to 'ntfs_writepage' for resident files. */
91397101
CH		 855 if (is_resident(ntfs_i(mapping->host)))
856 return generic_writepages(mapping, wbc);
857 return mpage_writepages(mapping, wbc, ntfs_get_block);
82cae269
KK		 858}
859
860static int ntfs_get_block_write_begin(struct inode *inode, sector_t vbn,
861 struct buffer_head *bh_result, int create)
862{
863 return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits,
864 bh_result, create, GET_BLOCK_WRITE_BEGIN);
865}
866
44ab23b9
MWO		 867int ntfs_write_begin(struct file *file, struct address_space *mapping,
868 loff_t pos, u32 len, struct page **pagep, void **fsdata)
82cae269
KK		 869{
870 int err;
871 struct inode *inode = mapping->host;
872 struct ntfs_inode *ni = ntfs_i(inode);
873
874 *pagep = NULL;
875 if (is_resident(ni)) {
876 struct page *page = grab_cache_page_write_begin(
b7446e7c 877 mapping, pos >> PAGE_SHIFT);
82cae269
KK		 878
879 if (!page) {
880 err = -ENOMEM;
881 goto out;
882 }
883
884 ni_lock(ni);
885 err = attr_data_read_resident(ni, page);
886 ni_unlock(ni);
887
888 if (!err) {
889 *pagep = page;
890 goto out;
891 }
892 unlock_page(page);
893 put_page(page);
894
895 if (err != E_NTFS_NONRESIDENT)
896 goto out;
897 }
898
b3992d1e 899 err = block_write_begin(mapping, pos, len, pagep,
82cae269
KK		 900 ntfs_get_block_write_begin);
901
902out:
903 return err;
904}
905
e8b8e97f
KA		 906/*
907 * ntfs_write_end - Address_space_operations::write_end.
908 */
44ab23b9
MWO		 909int ntfs_write_end(struct file *file, struct address_space *mapping,
910 loff_t pos, u32 len, u32 copied, struct page *page,
911 void *fsdata)
82cae269
KK		 912{
913 struct inode *inode = mapping->host;
914 struct ntfs_inode *ni = ntfs_i(inode);
915 u64 valid = ni->i_valid;
916 bool dirty = false;
917 int err;
918
919 if (is_resident(ni)) {
920 ni_lock(ni);
921 err = attr_data_write_resident(ni, page);
922 ni_unlock(ni);
923 if (!err) {
924 dirty = true;
e8b8e97f 925 /* Clear any buffers in page. */
82cae269
KK		 926 if (page_has_buffers(page)) {
927 struct buffer_head *head, *bh;
928
929 bh = head = page_buffers(page);
930 do {
931 clear_buffer_dirty(bh);
932 clear_buffer_mapped(bh);
933 set_buffer_uptodate(bh);
934 } while (head != (bh = bh->b_this_page));
935 }
936 SetPageUptodate(page);
937 err = copied;
938 }
939 unlock_page(page);
940 put_page(page);
941 } else {
942 err = generic_write_end(file, mapping, pos, len, copied, page,
943 fsdata);
944 }
945
946 if (err >= 0) {
947 if (!(ni->std_fa & FILE_ATTRIBUTE_ARCHIVE)) {
948 inode->i_ctime = inode->i_mtime = current_time(inode);
949 ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE;
950 dirty = true;
951 }
952
953 if (valid != ni->i_valid) {
e8b8e97f 954 /* ni->i_valid is changed in ntfs_get_block_vbo. */
82cae269
KK		 955 dirty = true;
956 }
957
958 if (dirty)
959 mark_inode_dirty(inode);
960 }
961
962 return err;
963}
964
965int reset_log_file(struct inode *inode)
966{
967 int err;
968 loff_t pos = 0;
969 u32 log_size = inode->i_size;
970 struct address_space *mapping = inode->i_mapping;
971
972 for (;;) {
973 u32 len;
974 void *kaddr;
975 struct page *page;
976
977 len = pos + PAGE_SIZE > log_size ? (log_size - pos) : PAGE_SIZE;
978
b3992d1e 979 err = block_write_begin(mapping, pos, len, &page,
82cae269
KK		 980 ntfs_get_block_write_begin);
981 if (err)
982 goto out;
983
984 kaddr = kmap_atomic(page);
985 memset(kaddr, -1, len);
986 kunmap_atomic(kaddr);
987 flush_dcache_page(page);
988
989 err = block_write_end(NULL, mapping, pos, len, len, page, NULL);
990 if (err < 0)
991 goto out;
992 pos += len;
993
994 if (pos >= log_size)
995 break;
996 balance_dirty_pages_ratelimited(mapping);
997 }
998out:
999 mark_inode_dirty_sync(inode);
1000
1001 return err;
1002}
1003
1004int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc)
1005{
1006 return _ni_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1007}
1008
1009int ntfs_sync_inode(struct inode *inode)
1010{
1011 return _ni_write_inode(inode, 1);
1012}
1013
1014/*
e8b8e97f
KA		 1015 * writeback_inode - Helper function for ntfs_flush_inodes().
1016 *
1017 * This writes both the inode and the file data blocks, waiting
1018 * for in flight data blocks before the start of the call. It
1019 * does not wait for any io started during the call.
82cae269
KK		 1020 */
1021static int writeback_inode(struct inode *inode)
1022{
1023 int ret = sync_inode_metadata(inode, 0);
1024
1025 if (!ret)
1026 ret = filemap_fdatawrite(inode->i_mapping);
1027 return ret;
1028}
1029
1030/*
e8b8e97f
KA		 1031 * ntfs_flush_inodes
1032 *
1033 * Write data and metadata corresponding to i1 and i2. The io is
82cae269
KK		 1034 * started but we do not wait for any of it to finish.
1035 *
e8b8e97f 1036 * filemap_flush() is used for the block device, so if there is a dirty
82cae269 1037 * page for a block already in flight, we will not wait and start the
e8b8e97f 1038 * io over again.
82cae269
KK		 1039 */
1040int ntfs_flush_inodes(struct super_block *sb, struct inode *i1,
1041 struct inode *i2)
1042{
1043 int ret = 0;
1044
1045 if (i1)
1046 ret = writeback_inode(i1);
1047 if (!ret && i2)
1048 ret = writeback_inode(i2);
1049 if (!ret)
680e667b 1050 ret = sync_blockdev_nowait(sb->s_bdev);
82cae269
KK		 1051 return ret;
1052}
1053
1054int inode_write_data(struct inode *inode, const void *data, size_t bytes)
1055{
1056 pgoff_t idx;
1057
e8b8e97f 1058 /* Write non resident data. */
82cae269
KK		 1059 for (idx = 0; bytes; idx++) {
1060 size_t op = bytes > PAGE_SIZE ? PAGE_SIZE : bytes;
1061 struct page *page = ntfs_map_page(inode->i_mapping, idx);
1062
1063 if (IS_ERR(page))
1064 return PTR_ERR(page);
1065
1066 lock_page(page);
1067 WARN_ON(!PageUptodate(page));
1068 ClearPageUptodate(page);
1069
1070 memcpy(page_address(page), data, op);
1071
1072 flush_dcache_page(page);
1073 SetPageUptodate(page);
1074 unlock_page(page);
1075
1076 ntfs_unmap_page(page);
1077
1078 bytes -= op;
1079 data = Add2Ptr(data, PAGE_SIZE);
1080 }
1081 return 0;
1082}
1083
1084/*
e8b8e97f
KA		 1085 * ntfs_reparse_bytes
1086 *
d3624466 1087 * Number of bytes for REPARSE_DATA_BUFFER(IO_REPARSE_TAG_SYMLINK)
e8b8e97f 1088 * for unicode string of @uni_len length.
82cae269
KK		 1089 */
1090static inline u32 ntfs_reparse_bytes(u32 uni_len)
1091{
e8b8e97f 1092 /* Header + unicode string + decorated unicode string. */
82cae269
KK		 1093 return sizeof(short) * (2 * uni_len + 4) +
1094 offsetof(struct REPARSE_DATA_BUFFER,
1095 SymbolicLinkReparseBuffer.PathBuffer);
1096}
1097
1098static struct REPARSE_DATA_BUFFER *
1099ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname,
1100 u32 size, u16 *nsize)
1101{
1102 int i, err;
1103 struct REPARSE_DATA_BUFFER *rp;
1104 __le16 *rp_name;
1105 typeof(rp->SymbolicLinkReparseBuffer) *rs;
1106
195c52bd 1107 rp = kzalloc(ntfs_reparse_bytes(2 * size + 2), GFP_NOFS);
82cae269
KK		 1108 if (!rp)
1109 return ERR_PTR(-ENOMEM);
1110
1111 rs = &rp->SymbolicLinkReparseBuffer;
1112 rp_name = rs->PathBuffer;
1113
e8b8e97f 1114 /* Convert link name to UTF-16. */
82cae269
KK		 1115 err = ntfs_nls_to_utf16(sbi, symname, size,
1116 (struct cpu_str *)(rp_name - 1), 2 * size,
1117 UTF16_LITTLE_ENDIAN);
1118 if (err < 0)
1119 goto out;
1120
e8b8e97f 1121 /* err = the length of unicode name of symlink. */
82cae269
KK		 1122 *nsize = ntfs_reparse_bytes(err);
1123
1124 if (*nsize > sbi->reparse.max_size) {
1125 err = -EFBIG;
1126 goto out;
1127 }
1128
e8b8e97f 1129 /* Translate Linux '/' into Windows '\'. */
82cae269
KK		 1130 for (i = 0; i < err; i++) {
1131 if (rp_name[i] == cpu_to_le16('/'))
1132 rp_name[i] = cpu_to_le16('\\');
1133 }
1134
1135 rp->ReparseTag = IO_REPARSE_TAG_SYMLINK;
1136 rp->ReparseDataLength =
1137 cpu_to_le16(*nsize - offsetof(struct REPARSE_DATA_BUFFER,
1138 SymbolicLinkReparseBuffer));
1139
e8b8e97f 1140 /* PrintName + SubstituteName. */
82cae269
KK		 1141 rs->SubstituteNameOffset = cpu_to_le16(sizeof(short) * err);
1142 rs->SubstituteNameLength = cpu_to_le16(sizeof(short) * err + 8);
1143 rs->PrintNameLength = rs->SubstituteNameOffset;
1144
1145 /*
e8b8e97f
KA		 1146 * TODO: Use relative path if possible to allow Windows to
1147 * parse this path.
1148 * 0-absolute path 1- relative path (SYMLINK_FLAG_RELATIVE).
82cae269
KK		 1149 */
1150 rs->Flags = 0;
1151
1152 memmove(rp_name + err + 4, rp_name, sizeof(short) * err);
1153
e8b8e97f 1154 /* Decorate SubstituteName. */
82cae269
KK		 1155 rp_name += err;
1156 rp_name[0] = cpu_to_le16('\\');
1157 rp_name[1] = cpu_to_le16('?');
1158 rp_name[2] = cpu_to_le16('?');
1159 rp_name[3] = cpu_to_le16('\\');
1160
1161 return rp;
1162out:
195c52bd 1163 kfree(rp);
82cae269
KK		 1164 return ERR_PTR(err);
1165}
1166
1167struct inode *ntfs_create_inode(struct user_namespace *mnt_userns,
1168 struct inode *dir, struct dentry *dentry,
1169 const struct cpu_str *uni, umode_t mode,
1170 dev_t dev, const char *symname, u32 size,
1171 struct ntfs_fnd *fnd)
1172{
1173 int err;
1174 struct super_block *sb = dir->i_sb;
1175 struct ntfs_sb_info *sbi = sb->s_fs_info;
1176 const struct qstr *name = &dentry->d_name;
1177 CLST ino = 0;
1178 struct ntfs_inode *dir_ni = ntfs_i(dir);
1179 struct ntfs_inode *ni = NULL;
1180 struct inode *inode = NULL;
1181 struct ATTRIB *attr;
1182 struct ATTR_STD_INFO5 *std5;
1183 struct ATTR_FILE_NAME *fname;
1184 struct MFT_REC *rec;
1185 u32 asize, dsize, sd_size;
1186 enum FILE_ATTRIBUTE fa;
1187 __le32 security_id = SECURITY_ID_INVALID;
1188 CLST vcn;
1189 const void *sd;
1190 u16 t16, nsize = 0, aid = 0;
1191 struct INDEX_ROOT *root, *dir_root;
1192 struct NTFS_DE *e, *new_de = NULL;
1193 struct REPARSE_DATA_BUFFER *rp = NULL;
1194 bool rp_inserted = false;
1195
d562e901
KK		 1196 ni_lock_dir(dir_ni);
1197
82cae269 1198 dir_root = indx_get_root(&dir_ni->dir, dir_ni, NULL, NULL);
d562e901
KK		 1199 if (!dir_root) {
1200 err = -EINVAL;
1201 goto out1;
1202 }
82cae269
KK		 1203
1204 if (S_ISDIR(mode)) {
d3624466 1205 /* Use parent's directory attributes. */
82cae269
KK		 1206 fa = dir_ni->std_fa | FILE_ATTRIBUTE_DIRECTORY |
1207 FILE_ATTRIBUTE_ARCHIVE;
1208 /*
d3624466
KK		 1209 * By default child directory inherits parent attributes.
1210 * Root directory is hidden + system.
1211 * Make an exception for children in root.
82cae269
KK		 1212 */
1213 if (dir->i_ino == MFT_REC_ROOT)
1214 fa &= ~(FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM);
1215 } else if (S_ISLNK(mode)) {
1216 /* It is good idea that link should be the same type (file/dir) as target */
1217 fa = FILE_ATTRIBUTE_REPARSE_POINT;
1218
1219 /*
d3624466
KK		 1220 * Linux: there are dir/file/symlink and so on.
1221 * NTFS: symlinks are "dir + reparse" or "file + reparse"
82cae269
KK		 1222 * It is good idea to create:
1223 * dir + reparse if 'symname' points to directory
1224 * or
1225 * file + reparse if 'symname' points to file
e8b8e97f 1226 * Unfortunately kern_path hangs if symname contains 'dir'.
82cae269
KK		 1227 */
1228
1229 /*
1230 * struct path path;
1231 *
1232 * if (!kern_path(symname, LOOKUP_FOLLOW, &path)){
1233 * struct inode *target = d_inode(path.dentry);
1234 *
1235 * if (S_ISDIR(target->i_mode))
1236 * fa |= FILE_ATTRIBUTE_DIRECTORY;
1237 * // if ( target->i_sb == sb ){
1238 * // use relative path?
1239 * // }
1240 * path_put(&path);
1241 * }
1242 */
1243 } else if (S_ISREG(mode)) {
564c97bd 1244 if (sbi->options->sparse) {
e8b8e97f 1245 /* Sparsed regular file, cause option 'sparse'. */
82cae269
KK		 1246 fa = FILE_ATTRIBUTE_SPARSE_FILE |
1247 FILE_ATTRIBUTE_ARCHIVE;
1248 } else if (dir_ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) {
e8b8e97f 1249 /* Compressed regular file, if parent is compressed. */
82cae269
KK		 1250 fa = FILE_ATTRIBUTE_COMPRESSED | FILE_ATTRIBUTE_ARCHIVE;
1251 } else {
e8b8e97f 1252 /* Regular file, default attributes. */
82cae269
KK		 1253 fa = FILE_ATTRIBUTE_ARCHIVE;
1254 }
1255 } else {
1256 fa = FILE_ATTRIBUTE_ARCHIVE;
1257 }
1258
1259 if (!(mode & 0222))
1260 fa |= FILE_ATTRIBUTE_READONLY;
1261
e8b8e97f 1262 /* Allocate PATH_MAX bytes. */
82cae269
KK		 1263 new_de = __getname();
1264 if (!new_de) {
1265 err = -ENOMEM;
1266 goto out1;
1267 }
1268
e8b8e97f 1269 /* Mark rw ntfs as dirty. it will be cleared at umount. */
82cae269
KK		 1270 ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
1271
e8b8e97f 1272 /* Step 1: allocate and fill new mft record. */
82cae269
KK		 1273 err = ntfs_look_free_mft(sbi, &ino, false, NULL, NULL);
1274 if (err)
1275 goto out2;
1276
1277 ni = ntfs_new_inode(sbi, ino, fa & FILE_ATTRIBUTE_DIRECTORY);
1278 if (IS_ERR(ni)) {
1279 err = PTR_ERR(ni);
1280 ni = NULL;
1281 goto out3;
1282 }
1283 inode = &ni->vfs_inode;
1284 inode_init_owner(mnt_userns, inode, dir, mode);
78ab59fe 1285 mode = inode->i_mode;
82cae269
KK		 1286
1287 inode->i_atime = inode->i_mtime = inode->i_ctime = ni->i_crtime =
1288 current_time(inode);
1289
1290 rec = ni->mi.mrec;
1291 rec->hard_links = cpu_to_le16(1);
1292 attr = Add2Ptr(rec, le16_to_cpu(rec->attr_off));
1293
e8b8e97f 1294 /* Get default security id. */
82cae269
KK		 1295 sd = s_default_security;
1296 sd_size = sizeof(s_default_security);
1297
1298 if (is_ntfs3(sbi)) {
1299 security_id = dir_ni->std_security_id;
1300 if (le32_to_cpu(security_id) < SECURITY_ID_FIRST) {
1301 security_id = sbi->security.def_security_id;
1302
1303 if (security_id == SECURITY_ID_INVALID &&
1304 !ntfs_insert_security(sbi, sd, sd_size,
1305 &security_id, NULL))
1306 sbi->security.def_security_id = security_id;
1307 }
1308 }
1309
e8b8e97f 1310 /* Insert standard info. */
82cae269
KK		 1311 std5 = Add2Ptr(attr, SIZEOF_RESIDENT);
1312
1313 if (security_id == SECURITY_ID_INVALID) {
1314 dsize = sizeof(struct ATTR_STD_INFO);
1315 } else {
1316 dsize = sizeof(struct ATTR_STD_INFO5);
1317 std5->security_id = security_id;
1318 ni->std_security_id = security_id;
1319 }
1320 asize = SIZEOF_RESIDENT + dsize;
1321
1322 attr->type = ATTR_STD;
1323 attr->size = cpu_to_le32(asize);
1324 attr->id = cpu_to_le16(aid++);
1325 attr->res.data_off = SIZEOF_RESIDENT_LE;
1326 attr->res.data_size = cpu_to_le32(dsize);
1327
1328 std5->cr_time = std5->m_time = std5->c_time = std5->a_time =
1329 kernel2nt(&inode->i_atime);
1330
1331 ni->std_fa = fa;
1332 std5->fa = fa;
1333
1334 attr = Add2Ptr(attr, asize);
1335
e8b8e97f 1336 /* Insert file name. */
82cae269
KK		 1337 err = fill_name_de(sbi, new_de, name, uni);
1338 if (err)
1339 goto out4;
1340
1341 mi_get_ref(&ni->mi, &new_de->ref);
1342
1343 fname = (struct ATTR_FILE_NAME *)(new_de + 1);
1344 mi_get_ref(&dir_ni->mi, &fname->home);
1345 fname->dup.cr_time = fname->dup.m_time = fname->dup.c_time =
1346 fname->dup.a_time = std5->cr_time;
1347 fname->dup.alloc_size = fname->dup.data_size = 0;
1348 fname->dup.fa = std5->fa;
1349 fname->dup.ea_size = fname->dup.reparse = 0;
1350
1351 dsize = le16_to_cpu(new_de->key_size);
fa3cacf5 1352 asize = ALIGN(SIZEOF_RESIDENT + dsize, 8);
82cae269
KK		 1353
1354 attr->type = ATTR_NAME;
1355 attr->size = cpu_to_le32(asize);
1356 attr->res.data_off = SIZEOF_RESIDENT_LE;
1357 attr->res.flags = RESIDENT_FLAG_INDEXED;
1358 attr->id = cpu_to_le16(aid++);
1359 attr->res.data_size = cpu_to_le32(dsize);
1360 memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), fname, dsize);
1361
1362 attr = Add2Ptr(attr, asize);
1363
1364 if (security_id == SECURITY_ID_INVALID) {
e8b8e97f 1365 /* Insert security attribute. */
fa3cacf5 1366 asize = SIZEOF_RESIDENT + ALIGN(sd_size, 8);
82cae269
KK		 1367
1368 attr->type = ATTR_SECURE;
1369 attr->size = cpu_to_le32(asize);
1370 attr->id = cpu_to_le16(aid++);
1371 attr->res.data_off = SIZEOF_RESIDENT_LE;
1372 attr->res.data_size = cpu_to_le32(sd_size);
1373 memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), sd, sd_size);
1374
1375 attr = Add2Ptr(attr, asize);
1376 }
1377
78ab59fe 1378 attr->id = cpu_to_le16(aid++);
82cae269
KK		 1379 if (fa & FILE_ATTRIBUTE_DIRECTORY) {
1380 /*
e8b8e97f
KA		 1381 * Regular directory or symlink to directory.
1382 * Create root attribute.
82cae269
KK		 1383 */
1384 dsize = sizeof(struct INDEX_ROOT) + sizeof(struct NTFS_DE);
1385 asize = sizeof(I30_NAME) + SIZEOF_RESIDENT + dsize;
1386
1387 attr->type = ATTR_ROOT;
1388 attr->size = cpu_to_le32(asize);
82cae269
KK		 1389
1390 attr->name_len = ARRAY_SIZE(I30_NAME);
1391 attr->name_off = SIZEOF_RESIDENT_LE;
1392 attr->res.data_off =
1393 cpu_to_le16(sizeof(I30_NAME) + SIZEOF_RESIDENT);
1394 attr->res.data_size = cpu_to_le32(dsize);
1395 memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), I30_NAME,
1396 sizeof(I30_NAME));
1397
1398 root = Add2Ptr(attr, sizeof(I30_NAME) + SIZEOF_RESIDENT);
1399 memcpy(root, dir_root, offsetof(struct INDEX_ROOT, ihdr));
1400 root->ihdr.de_off =
1401 cpu_to_le32(sizeof(struct INDEX_HDR)); // 0x10
1402 root->ihdr.used = cpu_to_le32(sizeof(struct INDEX_HDR) +
1403 sizeof(struct NTFS_DE));
1404 root->ihdr.total = root->ihdr.used;
1405
1406 e = Add2Ptr(root, sizeof(struct INDEX_ROOT));
1407 e->size = cpu_to_le16(sizeof(struct NTFS_DE));
1408 e->flags = NTFS_IE_LAST;
1409 } else if (S_ISLNK(mode)) {
1410 /*
e8b8e97f
KA		 1411 * Symlink to file.
1412 * Create empty resident data attribute.
82cae269
KK		 1413 */
1414 asize = SIZEOF_RESIDENT;
1415
e8b8e97f 1416 /* Insert empty ATTR_DATA */
82cae269
KK		 1417 attr->type = ATTR_DATA;
1418 attr->size = cpu_to_le32(SIZEOF_RESIDENT);
82cae269
KK		 1419 attr->name_off = SIZEOF_RESIDENT_LE;
1420 attr->res.data_off = SIZEOF_RESIDENT_LE;
78ab59fe 1421 } else if (S_ISREG(mode)) {
82cae269 1422 /*
78ab59fe 1423 * Regular file. Create empty non resident data attribute.
82cae269
KK		 1424 */
1425 attr->type = ATTR_DATA;
78ab59fe
KK		 1426 attr->non_res = 1;
1427 attr->nres.evcn = cpu_to_le64(-1ll);
1428 if (fa & FILE_ATTRIBUTE_SPARSE_FILE) {
1429 attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8);
1430 attr->name_off = SIZEOF_NONRESIDENT_EX_LE;
1431 attr->flags = ATTR_FLAG_SPARSED;
1432 asize = SIZEOF_NONRESIDENT_EX + 8;
1433 } else if (fa & FILE_ATTRIBUTE_COMPRESSED) {
1434 attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8);
1435 attr->name_off = SIZEOF_NONRESIDENT_EX_LE;
1436 attr->flags = ATTR_FLAG_COMPRESSED;
1437 attr->nres.c_unit = COMPRESSION_UNIT;
1438 asize = SIZEOF_NONRESIDENT_EX + 8;
82cae269 1439 } else {
78ab59fe
KK		 1440 attr->size = cpu_to_le32(SIZEOF_NONRESIDENT + 8);
1441 attr->name_off = SIZEOF_NONRESIDENT_LE;
1442 asize = SIZEOF_NONRESIDENT + 8;
82cae269 1443 }
78ab59fe
KK		 1444 attr->nres.run_off = attr->name_off;
1445 } else {
1446 /*
1447 * Node. Create empty resident data attribute.
1448 */
1449 attr->type = ATTR_DATA;
1450 attr->size = cpu_to_le32(SIZEOF_RESIDENT);
1451 attr->name_off = SIZEOF_RESIDENT_LE;
1452 if (fa & FILE_ATTRIBUTE_SPARSE_FILE)
1453 attr->flags = ATTR_FLAG_SPARSED;
1454 else if (fa & FILE_ATTRIBUTE_COMPRESSED)
1455 attr->flags = ATTR_FLAG_COMPRESSED;
1456 attr->res.data_off = SIZEOF_RESIDENT_LE;
1457 asize = SIZEOF_RESIDENT;
1458 ni->ni_flags |= NI_FLAG_RESIDENT;
82cae269
KK		 1459 }
1460
1461 if (S_ISDIR(mode)) {
1462 ni->ni_flags |= NI_FLAG_DIR;
1463 err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30);
1464 if (err)
1465 goto out4;
1466 } else if (S_ISLNK(mode)) {
1467 rp = ntfs_create_reparse_buffer(sbi, symname, size, &nsize);
1468
1469 if (IS_ERR(rp)) {
1470 err = PTR_ERR(rp);
1471 rp = NULL;
1472 goto out4;
1473 }
1474
1475 /*
e8b8e97f 1476 * Insert ATTR_REPARSE.
82cae269
KK		 1477 */
1478 attr = Add2Ptr(attr, asize);
1479 attr->type = ATTR_REPARSE;
1480 attr->id = cpu_to_le16(aid++);
1481
e8b8e97f 1482 /* Resident or non resident? */
fa3cacf5 1483 asize = ALIGN(SIZEOF_RESIDENT + nsize, 8);
82cae269
KK		 1484 t16 = PtrOffset(rec, attr);
1485
14a98119
KK		 1486 /*
1487 * Below function 'ntfs_save_wsl_perm' requires 0x78 bytes.
1488 * It is good idea to keep extened attributes resident.
1489 */
78ab59fe 1490 if (asize + t16 + 0x78 + 8 > sbi->record_size) {
82cae269
KK		 1491 CLST alen;
1492 CLST clst = bytes_to_cluster(sbi, nsize);
1493
e8b8e97f 1494 /* Bytes per runs. */
82cae269
KK		 1495 t16 = sbi->record_size - t16 - SIZEOF_NONRESIDENT;
1496
1497 attr->non_res = 1;
1498 attr->nres.evcn = cpu_to_le64(clst - 1);
1499 attr->name_off = SIZEOF_NONRESIDENT_LE;
1500 attr->nres.run_off = attr->name_off;
1501 attr->nres.data_size = cpu_to_le64(nsize);
1502 attr->nres.valid_size = attr->nres.data_size;
1503 attr->nres.alloc_size =
1504 cpu_to_le64(ntfs_up_cluster(sbi, nsize));
1505
1506 err = attr_allocate_clusters(sbi, &ni->file.run, 0, 0,
1507 clst, NULL, 0, &alen, 0,
1508 NULL);
1509 if (err)
1510 goto out5;
1511
1512 err = run_pack(&ni->file.run, 0, clst,
1513 Add2Ptr(attr, SIZEOF_NONRESIDENT), t16,
1514 &vcn);
1515 if (err < 0)
1516 goto out5;
1517
1518 if (vcn != clst) {
1519 err = -EINVAL;
1520 goto out5;
1521 }
1522
fa3cacf5 1523 asize = SIZEOF_NONRESIDENT + ALIGN(err, 8);
82cae269
KK		 1524 } else {
1525 attr->res.data_off = SIZEOF_RESIDENT_LE;
1526 attr->res.data_size = cpu_to_le32(nsize);
1527 memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), rp, nsize);
82cae269
KK		 1528 nsize = 0;
1529 }
14a98119
KK		 1530 /* Size of symlink equals the length of input string. */
1531 inode->i_size = size;
82cae269
KK		 1532
1533 attr->size = cpu_to_le32(asize);
1534
1535 err = ntfs_insert_reparse(sbi, IO_REPARSE_TAG_SYMLINK,
1536 &new_de->ref);
1537 if (err)
1538 goto out5;
1539
1540 rp_inserted = true;
1541 }
1542
1543 attr = Add2Ptr(attr, asize);
1544 attr->type = ATTR_END;
1545
1546 rec->used = cpu_to_le32(PtrOffset(rec, attr) + 8);
1547 rec->next_attr_id = cpu_to_le16(aid);
1548
e8b8e97f 1549 /* Step 2: Add new name in index. */
78ab59fe 1550 err = indx_insert_entry(&dir_ni->dir, dir_ni, new_de, sbi, fnd, 0);
82cae269
KK		 1551 if (err)
1552 goto out6;
1553
d562e901
KK		 1554 /* Unlock parent directory before ntfs_init_acl. */
1555 ni_unlock(dir_ni);
1556
82cae269
KK		 1557 inode->i_generation = le16_to_cpu(rec->seq);
1558
1559 dir->i_mtime = dir->i_ctime = inode->i_atime;
1560
1561 if (S_ISDIR(mode)) {
82cae269
KK		 1562 inode->i_op = &ntfs_dir_inode_operations;
1563 inode->i_fop = &ntfs_dir_operations;
1564 } else if (S_ISLNK(mode)) {
1565 inode->i_op = &ntfs_link_inode_operations;
1566 inode->i_fop = NULL;
1567 inode->i_mapping->a_ops = &ntfs_aops;
14a98119
KK		 1568 inode->i_size = size;
1569 inode_nohighmem(inode);
82cae269
KK		 1570 } else if (S_ISREG(mode)) {
1571 inode->i_op = &ntfs_file_inode_operations;
1572 inode->i_fop = &ntfs_file_operations;
1573 inode->i_mapping->a_ops =
1574 is_compressed(ni) ? &ntfs_aops_cmpr : &ntfs_aops;
1575 init_rwsem(&ni->file.run_lock);
1576 } else {
1577 inode->i_op = &ntfs_special_inode_operations;
1578 init_special_inode(inode, mode, dev);
1579 }
1580
1581#ifdef CONFIG_NTFS3_FS_POSIX_ACL
1582 if (!S_ISLNK(mode) && (sb->s_flags & SB_POSIXACL)) {
1583 err = ntfs_init_acl(mnt_userns, inode, dir);
1584 if (err)
6c1ee4d3 1585 goto out7;
82cae269
KK		 1586 } else
1587#endif
1588 {
1589 inode->i_flags |= S_NOSEC;
1590 }
1591
e8b8e97f 1592 /* Write non resident data. */
82cae269 1593 if (nsize) {
63544672 1594 err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rp, nsize, 0);
82cae269
KK		 1595 if (err)
1596 goto out7;
1597 }
1598
e8b8e97f
KA		 1599 /*
1600 * Call 'd_instantiate' after inode->i_op is set
1601 * but before finish_open.
1602 */
82cae269
KK		 1603 d_instantiate(dentry, inode);
1604
1605 ntfs_save_wsl_perm(inode);
82cae269 1606 mark_inode_dirty(dir);
78ab59fe 1607 mark_inode_dirty(inode);
82cae269 1608
e8b8e97f 1609 /* Normal exit. */
82cae269
KK		 1610 goto out2;
1611
1612out7:
1613
e8b8e97f 1614 /* Undo 'indx_insert_entry'. */
d562e901 1615 ni_lock_dir(dir_ni);
82cae269
KK		 1616 indx_delete_entry(&dir_ni->dir, dir_ni, new_de + 1,
1617 le16_to_cpu(new_de->key_size), sbi);
d562e901 1618 /* ni_unlock(dir_ni); will be called later. */
82cae269
KK		 1619out6:
1620 if (rp_inserted)
1621 ntfs_remove_reparse(sbi, IO_REPARSE_TAG_SYMLINK, &new_de->ref);
1622
1623out5:
1624 if (S_ISDIR(mode) || run_is_empty(&ni->file.run))
1625 goto out4;
1626
1627 run_deallocate(sbi, &ni->file.run, false);
1628
1629out4:
1630 clear_rec_inuse(rec);
1631 clear_nlink(inode);
1632 ni->mi.dirty = false;
1633 discard_new_inode(inode);
1634out3:
1635 ntfs_mark_rec_free(sbi, ino);
1636
1637out2:
1638 __putname(new_de);
195c52bd 1639 kfree(rp);
82cae269
KK		 1640
1641out1:
d562e901
KK		 1642 if (err) {
1643 ni_unlock(dir_ni);
82cae269 1644 return ERR_PTR(err);
d562e901 1645 }
82cae269
KK		 1646
1647 unlock_new_inode(inode);
1648
1649 return inode;
1650}
1651
1652int ntfs_link_inode(struct inode *inode, struct dentry *dentry)
1653{
1654 int err;
82cae269 1655 struct ntfs_inode *ni = ntfs_i(inode);
78ab59fe
KK		 1656 struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
1657 struct NTFS_DE *de;
1658 struct ATTR_FILE_NAME *de_name;
82cae269 1659
e8b8e97f 1660 /* Allocate PATH_MAX bytes. */
78ab59fe
KK		 1661 de = __getname();
1662 if (!de)
82cae269
KK		 1663 return -ENOMEM;
1664
78ab59fe
KK		 1665 /* Mark rw ntfs as dirty. It will be cleared at umount. */
1666 ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
82cae269 1667
78ab59fe
KK		 1668 /* Construct 'de'. */
1669 err = fill_name_de(sbi, de, &dentry->d_name, NULL);
82cae269
KK		 1670 if (err)
1671 goto out;
1672
78ab59fe
KK		 1673 de_name = (struct ATTR_FILE_NAME *)(de + 1);
1674 /* Fill duplicate info. */
1675 de_name->dup.cr_time = de_name->dup.m_time = de_name->dup.c_time =
1676 de_name->dup.a_time = kernel2nt(&inode->i_ctime);
1677 de_name->dup.alloc_size = de_name->dup.data_size =
1678 cpu_to_le64(inode->i_size);
1679 de_name->dup.fa = ni->std_fa;
1680 de_name->dup.ea_size = de_name->dup.reparse = 0;
82cae269 1681
78ab59fe 1682 err = ni_add_name(ntfs_i(d_inode(dentry->d_parent)), ni, de);
82cae269 1683out:
78ab59fe 1684 __putname(de);
82cae269
KK		 1685 return err;
1686}
1687
1688/*
1689 * ntfs_unlink_inode
1690 *
1691 * inode_operations::unlink
1692 * inode_operations::rmdir
1693 */
1694int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry)
1695{
1696 int err;
78ab59fe 1697 struct ntfs_sb_info *sbi = dir->i_sb->s_fs_info;
82cae269
KK		 1698 struct inode *inode = d_inode(dentry);
1699 struct ntfs_inode *ni = ntfs_i(inode);
82cae269 1700 struct ntfs_inode *dir_ni = ntfs_i(dir);
78ab59fe
KK		 1701 struct NTFS_DE *de, *de2 = NULL;
1702 int undo_remove;
82cae269 1703
78ab59fe 1704 if (ntfs_is_meta_file(sbi, ni->mi.rno))
82cae269
KK		 1705 return -EINVAL;
1706
78ab59fe
KK		 1707 /* Allocate PATH_MAX bytes. */
1708 de = __getname();
1709 if (!de)
1710 return -ENOMEM;
1711
82cae269
KK		 1712 ni_lock(ni);
1713
78ab59fe 1714 if (S_ISDIR(inode->i_mode) && !dir_is_empty(inode)) {
82cae269 1715 err = -ENOTEMPTY;
78ab59fe 1716 goto out;
82cae269
KK		 1717 }
1718
78ab59fe 1719 err = fill_name_de(sbi, de, &dentry->d_name, NULL);
82cae269 1720 if (err < 0)
78ab59fe 1721 goto out;
82cae269 1722
78ab59fe
KK		 1723 undo_remove = 0;
1724 err = ni_remove_name(dir_ni, ni, de, &de2, &undo_remove);
82cae269 1725
78ab59fe 1726 if (!err) {
82cae269 1727 drop_nlink(inode);
78ab59fe
KK		 1728 dir->i_mtime = dir->i_ctime = current_time(dir);
1729 mark_inode_dirty(dir);
1730 inode->i_ctime = dir->i_ctime;
1731 if (inode->i_nlink)
1732 mark_inode_dirty(inode);
1733 } else if (!ni_remove_name_undo(dir_ni, ni, de, de2, undo_remove)) {
82cae269 1734 make_bad_inode(inode);
78ab59fe
KK		 1735 ntfs_inode_err(inode, "failed to undo unlink");
1736 ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
1737 } else {
1738 if (ni_is_dirty(dir))
1739 mark_inode_dirty(dir);
1740 if (ni_is_dirty(inode))
1741 mark_inode_dirty(inode);
82cae269
KK		 1742 }
1743
78ab59fe 1744out:
82cae269 1745 ni_unlock(ni);
78ab59fe 1746 __putname(de);
82cae269
KK		 1747 return err;
1748}
1749
1750void ntfs_evict_inode(struct inode *inode)
1751{
1752 truncate_inode_pages_final(&inode->i_data);
1753
1754 if (inode->i_nlink)
1755 _ni_write_inode(inode, inode_needs_sync(inode));
1756
1757 invalidate_inode_buffers(inode);
1758 clear_inode(inode);
1759
1760 ni_clear(ntfs_i(inode));
1761}
1762
1763static noinline int ntfs_readlink_hlp(struct inode *inode, char *buffer,
1764 int buflen)
1765{
4dbe8e44 1766 int i, err = -EINVAL;
82cae269
KK		 1767 struct ntfs_inode *ni = ntfs_i(inode);
1768 struct super_block *sb = inode->i_sb;
1769 struct ntfs_sb_info *sbi = sb->s_fs_info;
4dbe8e44
KK		 1770 u64 size;
1771 u16 ulen = 0;
82cae269
KK		 1772 void *to_free = NULL;
1773 struct REPARSE_DATA_BUFFER *rp;
4dbe8e44 1774 const __le16 *uname;
82cae269
KK		 1775 struct ATTRIB *attr;
1776
e8b8e97f 1777 /* Reparse data present. Try to parse it. */
82cae269
KK		 1778 static_assert(!offsetof(struct REPARSE_DATA_BUFFER, ReparseTag));
1779 static_assert(sizeof(u32) == sizeof(rp->ReparseTag));
1780
1781 *buffer = 0;
1782
82cae269 1783 attr = ni_find_attr(ni, NULL, NULL, ATTR_REPARSE, NULL, 0, NULL, NULL);
4dbe8e44 1784 if (!attr)
82cae269 1785 goto out;
82cae269
KK		 1786
1787 if (!attr->non_res) {
4dbe8e44
KK		 1788 rp = resident_data_ex(attr, sizeof(struct REPARSE_DATA_BUFFER));
1789 if (!rp)
82cae269 1790 goto out;
4dbe8e44 1791 size = le32_to_cpu(attr->res.data_size);
82cae269 1792 } else {
4dbe8e44
KK		 1793 size = le64_to_cpu(attr->nres.data_size);
1794 rp = NULL;
1795 }
1796
1797 if (size > sbi->reparse.max_size || size <= sizeof(u32))
1798 goto out;
1799
1800 if (!rp) {
1801 rp = kmalloc(size, GFP_NOFS);
82cae269
KK		 1802 if (!rp) {
1803 err = -ENOMEM;
1804 goto out;
1805 }
1806 to_free = rp;
4dbe8e44
KK		 1807 /* Read into temporal buffer. */
1808 err = ntfs_read_run_nb(sbi, &ni->file.run, 0, rp, size, NULL);
82cae269
KK		 1809 if (err)
1810 goto out;
1811 }
1812
e8b8e97f 1813 /* Microsoft Tag. */
82cae269
KK		 1814 switch (rp->ReparseTag) {
1815 case IO_REPARSE_TAG_MOUNT_POINT:
e8b8e97f 1816 /* Mount points and junctions. */
82cae269 1817 /* Can we use 'Rp->MountPointReparseBuffer.PrintNameLength'? */
4dbe8e44
KK		 1818 if (size <= offsetof(struct REPARSE_DATA_BUFFER,
1819 MountPointReparseBuffer.PathBuffer))
82cae269 1820 goto out;
4dbe8e44
KK		 1821 uname = Add2Ptr(rp,
1822 offsetof(struct REPARSE_DATA_BUFFER,
1823 MountPointReparseBuffer.PathBuffer) +
1824 le16_to_cpu(rp->MountPointReparseBuffer
1825 .PrintNameOffset));
1826 ulen = le16_to_cpu(rp->MountPointReparseBuffer.PrintNameLength);
82cae269
KK		 1827 break;
1828
1829 case IO_REPARSE_TAG_SYMLINK:
1830 /* FolderSymbolicLink */
1831 /* Can we use 'Rp->SymbolicLinkReparseBuffer.PrintNameLength'? */
4dbe8e44
KK		 1832 if (size <= offsetof(struct REPARSE_DATA_BUFFER,
1833 SymbolicLinkReparseBuffer.PathBuffer))
82cae269 1834 goto out;
4dbe8e44
KK		 1835 uname = Add2Ptr(
1836 rp, offsetof(struct REPARSE_DATA_BUFFER,
1837 SymbolicLinkReparseBuffer.PathBuffer) +
1838 le16_to_cpu(rp->SymbolicLinkReparseBuffer
1839 .PrintNameOffset));
1840 ulen = le16_to_cpu(
82cae269
KK		 1841 rp->SymbolicLinkReparseBuffer.PrintNameLength);
1842 break;
1843
1844 case IO_REPARSE_TAG_CLOUD:
1845 case IO_REPARSE_TAG_CLOUD_1:
1846 case IO_REPARSE_TAG_CLOUD_2:
1847 case IO_REPARSE_TAG_CLOUD_3:
1848 case IO_REPARSE_TAG_CLOUD_4:
1849 case IO_REPARSE_TAG_CLOUD_5:
1850 case IO_REPARSE_TAG_CLOUD_6:
1851 case IO_REPARSE_TAG_CLOUD_7:
1852 case IO_REPARSE_TAG_CLOUD_8:
1853 case IO_REPARSE_TAG_CLOUD_9:
1854 case IO_REPARSE_TAG_CLOUD_A:
1855 case IO_REPARSE_TAG_CLOUD_B:
1856 case IO_REPARSE_TAG_CLOUD_C:
1857 case IO_REPARSE_TAG_CLOUD_D:
1858 case IO_REPARSE_TAG_CLOUD_E:
1859 case IO_REPARSE_TAG_CLOUD_F:
1860 err = sizeof("OneDrive") - 1;
1861 if (err > buflen)
1862 err = buflen;
1863 memcpy(buffer, "OneDrive", err);
1864 goto out;
1865
1866 default:
1867 if (IsReparseTagMicrosoft(rp->ReparseTag)) {
d3624466 1868 /* Unknown Microsoft Tag. */
82cae269
KK		 1869 goto out;
1870 }
1871 if (!IsReparseTagNameSurrogate(rp->ReparseTag) ||
4dbe8e44 1872 size <= sizeof(struct REPARSE_POINT)) {
82cae269
KK		 1873 goto out;
1874 }
1875
e8b8e97f 1876 /* Users tag. */
4dbe8e44
KK		 1877 uname = Add2Ptr(rp, sizeof(struct REPARSE_POINT));
1878 ulen = le16_to_cpu(rp->ReparseDataLength) -
82cae269
KK		 1879 sizeof(struct REPARSE_POINT);
1880 }
1881
e8b8e97f 1882 /* Convert nlen from bytes to UNICODE chars. */
4dbe8e44 1883 ulen >>= 1;
82cae269 1884
e8b8e97f 1885 /* Check that name is available. */
4dbe8e44 1886 if (!ulen || uname + ulen > (__le16 *)Add2Ptr(rp, size))
82cae269
KK		 1887 goto out;
1888
e8b8e97f 1889 /* If name is already zero terminated then truncate it now. */
4dbe8e44
KK		 1890 if (!uname[ulen - 1])
1891 ulen -= 1;
82cae269 1892
4dbe8e44 1893 err = ntfs_utf16_to_nls(sbi, uname, ulen, buffer, buflen);
82cae269
KK		 1894
1895 if (err < 0)
1896 goto out;
1897
e8b8e97f 1898 /* Translate Windows '\' into Linux '/'. */
82cae269
KK		 1899 for (i = 0; i < err; i++) {
1900 if (buffer[i] == '\\')
1901 buffer[i] = '/';
1902 }
1903
e8b8e97f 1904 /* Always set last zero. */
82cae269
KK		 1905 buffer[err] = 0;
1906out:
195c52bd 1907 kfree(to_free);
82cae269
KK		 1908 return err;
1909}
1910
1911static const char *ntfs_get_link(struct dentry *de, struct inode *inode,
1912 struct delayed_call *done)
1913{
1914 int err;
1915 char *ret;
1916
1917 if (!de)
1918 return ERR_PTR(-ECHILD);
1919
1920 ret = kmalloc(PAGE_SIZE, GFP_NOFS);
1921 if (!ret)
1922 return ERR_PTR(-ENOMEM);
1923
1924 err = ntfs_readlink_hlp(inode, ret, PAGE_SIZE);
1925 if (err < 0) {
1926 kfree(ret);
1927 return ERR_PTR(err);
1928 }
1929
1930 set_delayed_call(done, kfree_link, ret);
1931
1932 return ret;
1933}
1934
1935// clang-format off
1936const struct inode_operations ntfs_link_inode_operations = {
1937 .get_link = ntfs_get_link,
1938 .setattr = ntfs3_setattr,
1939 .listxattr = ntfs_listxattr,
1940 .permission = ntfs_permission,
1941 .get_acl = ntfs_get_acl,
1942 .set_acl = ntfs_set_acl,
1943};
1944
1945const struct address_space_operations ntfs_aops = {
f132ab7d 1946 .read_folio = ntfs_read_folio,
82cae269
KK		 1947 .readahead = ntfs_readahead,
1948 .writepage = ntfs_writepage,
1949 .writepages = ntfs_writepages,
1950 .write_begin = ntfs_write_begin,
1951 .write_end = ntfs_write_end,
1952 .direct_IO = ntfs_direct_IO,
1953 .bmap = ntfs_bmap,
e621900a 1954 .dirty_folio = block_dirty_folio,
724bbe49 1955 .invalidate_folio = block_invalidate_folio,
82cae269
KK		 1956};
1957
1958const struct address_space_operations ntfs_aops_cmpr = {
f132ab7d 1959 .read_folio = ntfs_read_folio,
82cae269
KK		 1960 .readahead = ntfs_readahead,
1961};
1962// clang-format on
Linux 6.x block layer and io_uring tree(s)