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Merge tag 'gpio-fixes-for-v5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel...
[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);
632 ll_rw_block(REQ_OP_READ, 0, 1, &bh);
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{
854 struct inode *inode = mapping->host;
855 struct ntfs_inode *ni = ntfs_i(inode);
e8b8e97f 856 /* Redirect call to 'ntfs_writepage' for resident files. */
82cae269
KK		 857 get_block_t *get_block = is_resident(ni) ? NULL : &ntfs_get_block;
858
859 return mpage_writepages(mapping, wbc, get_block);
860}
861
862static int ntfs_get_block_write_begin(struct inode *inode, sector_t vbn,
863 struct buffer_head *bh_result, int create)
864{
865 return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits,
866 bh_result, create, GET_BLOCK_WRITE_BEGIN);
867}
868
44ab23b9
MWO		 869int ntfs_write_begin(struct file *file, struct address_space *mapping,
870 loff_t pos, u32 len, struct page **pagep, void **fsdata)
82cae269
KK		 871{
872 int err;
873 struct inode *inode = mapping->host;
874 struct ntfs_inode *ni = ntfs_i(inode);
875
876 *pagep = NULL;
877 if (is_resident(ni)) {
878 struct page *page = grab_cache_page_write_begin(
b7446e7c 879 mapping, pos >> PAGE_SHIFT);
82cae269
KK		 880
881 if (!page) {
882 err = -ENOMEM;
883 goto out;
884 }
885
886 ni_lock(ni);
887 err = attr_data_read_resident(ni, page);
888 ni_unlock(ni);
889
890 if (!err) {
891 *pagep = page;
892 goto out;
893 }
894 unlock_page(page);
895 put_page(page);
896
897 if (err != E_NTFS_NONRESIDENT)
898 goto out;
899 }
900
b3992d1e 901 err = block_write_begin(mapping, pos, len, pagep,
82cae269
KK		 902 ntfs_get_block_write_begin);
903
904out:
905 return err;
906}
907
e8b8e97f
KA		 908/*
909 * ntfs_write_end - Address_space_operations::write_end.
910 */
44ab23b9
MWO		 911int ntfs_write_end(struct file *file, struct address_space *mapping,
912 loff_t pos, u32 len, u32 copied, struct page *page,
913 void *fsdata)
82cae269
KK		 914{
915 struct inode *inode = mapping->host;
916 struct ntfs_inode *ni = ntfs_i(inode);
917 u64 valid = ni->i_valid;
918 bool dirty = false;
919 int err;
920
921 if (is_resident(ni)) {
922 ni_lock(ni);
923 err = attr_data_write_resident(ni, page);
924 ni_unlock(ni);
925 if (!err) {
926 dirty = true;
e8b8e97f 927 /* Clear any buffers in page. */
82cae269
KK		 928 if (page_has_buffers(page)) {
929 struct buffer_head *head, *bh;
930
931 bh = head = page_buffers(page);
932 do {
933 clear_buffer_dirty(bh);
934 clear_buffer_mapped(bh);
935 set_buffer_uptodate(bh);
936 } while (head != (bh = bh->b_this_page));
937 }
938 SetPageUptodate(page);
939 err = copied;
940 }
941 unlock_page(page);
942 put_page(page);
943 } else {
944 err = generic_write_end(file, mapping, pos, len, copied, page,
945 fsdata);
946 }
947
948 if (err >= 0) {
949 if (!(ni->std_fa & FILE_ATTRIBUTE_ARCHIVE)) {
950 inode->i_ctime = inode->i_mtime = current_time(inode);
951 ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE;
952 dirty = true;
953 }
954
955 if (valid != ni->i_valid) {
e8b8e97f 956 /* ni->i_valid is changed in ntfs_get_block_vbo. */
82cae269
KK		 957 dirty = true;
958 }
959
960 if (dirty)
961 mark_inode_dirty(inode);
962 }
963
964 return err;
965}
966
967int reset_log_file(struct inode *inode)
968{
969 int err;
970 loff_t pos = 0;
971 u32 log_size = inode->i_size;
972 struct address_space *mapping = inode->i_mapping;
973
974 for (;;) {
975 u32 len;
976 void *kaddr;
977 struct page *page;
978
979 len = pos + PAGE_SIZE > log_size ? (log_size - pos) : PAGE_SIZE;
980
b3992d1e 981 err = block_write_begin(mapping, pos, len, &page,
82cae269
KK		 982 ntfs_get_block_write_begin);
983 if (err)
984 goto out;
985
986 kaddr = kmap_atomic(page);
987 memset(kaddr, -1, len);
988 kunmap_atomic(kaddr);
989 flush_dcache_page(page);
990
991 err = block_write_end(NULL, mapping, pos, len, len, page, NULL);
992 if (err < 0)
993 goto out;
994 pos += len;
995
996 if (pos >= log_size)
997 break;
998 balance_dirty_pages_ratelimited(mapping);
999 }
1000out:
1001 mark_inode_dirty_sync(inode);
1002
1003 return err;
1004}
1005
1006int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc)
1007{
1008 return _ni_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
1009}
1010
1011int ntfs_sync_inode(struct inode *inode)
1012{
1013 return _ni_write_inode(inode, 1);
1014}
1015
1016/*
e8b8e97f
KA		 1017 * writeback_inode - Helper function for ntfs_flush_inodes().
1018 *
1019 * This writes both the inode and the file data blocks, waiting
1020 * for in flight data blocks before the start of the call. It
1021 * does not wait for any io started during the call.
82cae269
KK		 1022 */
1023static int writeback_inode(struct inode *inode)
1024{
1025 int ret = sync_inode_metadata(inode, 0);
1026
1027 if (!ret)
1028 ret = filemap_fdatawrite(inode->i_mapping);
1029 return ret;
1030}
1031
1032/*
e8b8e97f
KA		 1033 * ntfs_flush_inodes
1034 *
1035 * Write data and metadata corresponding to i1 and i2. The io is
82cae269
KK		 1036 * started but we do not wait for any of it to finish.
1037 *
e8b8e97f 1038 * filemap_flush() is used for the block device, so if there is a dirty
82cae269 1039 * page for a block already in flight, we will not wait and start the
e8b8e97f 1040 * io over again.
82cae269
KK		 1041 */
1042int ntfs_flush_inodes(struct super_block *sb, struct inode *i1,
1043 struct inode *i2)
1044{
1045 int ret = 0;
1046
1047 if (i1)
1048 ret = writeback_inode(i1);
1049 if (!ret && i2)
1050 ret = writeback_inode(i2);
1051 if (!ret)
680e667b 1052 ret = sync_blockdev_nowait(sb->s_bdev);
82cae269
KK		 1053 return ret;
1054}
1055
1056int inode_write_data(struct inode *inode, const void *data, size_t bytes)
1057{
1058 pgoff_t idx;
1059
e8b8e97f 1060 /* Write non resident data. */
82cae269
KK		 1061 for (idx = 0; bytes; idx++) {
1062 size_t op = bytes > PAGE_SIZE ? PAGE_SIZE : bytes;
1063 struct page *page = ntfs_map_page(inode->i_mapping, idx);
1064
1065 if (IS_ERR(page))
1066 return PTR_ERR(page);
1067
1068 lock_page(page);
1069 WARN_ON(!PageUptodate(page));
1070 ClearPageUptodate(page);
1071
1072 memcpy(page_address(page), data, op);
1073
1074 flush_dcache_page(page);
1075 SetPageUptodate(page);
1076 unlock_page(page);
1077
1078 ntfs_unmap_page(page);
1079
1080 bytes -= op;
1081 data = Add2Ptr(data, PAGE_SIZE);
1082 }
1083 return 0;
1084}
1085
1086/*
e8b8e97f
KA		 1087 * ntfs_reparse_bytes
1088 *
d3624466 1089 * Number of bytes for REPARSE_DATA_BUFFER(IO_REPARSE_TAG_SYMLINK)
e8b8e97f 1090 * for unicode string of @uni_len length.
82cae269
KK		 1091 */
1092static inline u32 ntfs_reparse_bytes(u32 uni_len)
1093{
e8b8e97f 1094 /* Header + unicode string + decorated unicode string. */
82cae269
KK		 1095 return sizeof(short) * (2 * uni_len + 4) +
1096 offsetof(struct REPARSE_DATA_BUFFER,
1097 SymbolicLinkReparseBuffer.PathBuffer);
1098}
1099
1100static struct REPARSE_DATA_BUFFER *
1101ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname,
1102 u32 size, u16 *nsize)
1103{
1104 int i, err;
1105 struct REPARSE_DATA_BUFFER *rp;
1106 __le16 *rp_name;
1107 typeof(rp->SymbolicLinkReparseBuffer) *rs;
1108
195c52bd 1109 rp = kzalloc(ntfs_reparse_bytes(2 * size + 2), GFP_NOFS);
82cae269
KK		 1110 if (!rp)
1111 return ERR_PTR(-ENOMEM);
1112
1113 rs = &rp->SymbolicLinkReparseBuffer;
1114 rp_name = rs->PathBuffer;
1115
e8b8e97f 1116 /* Convert link name to UTF-16. */
82cae269
KK		 1117 err = ntfs_nls_to_utf16(sbi, symname, size,
1118 (struct cpu_str *)(rp_name - 1), 2 * size,
1119 UTF16_LITTLE_ENDIAN);
1120 if (err < 0)
1121 goto out;
1122
e8b8e97f 1123 /* err = the length of unicode name of symlink. */
82cae269
KK		 1124 *nsize = ntfs_reparse_bytes(err);
1125
1126 if (*nsize > sbi->reparse.max_size) {
1127 err = -EFBIG;
1128 goto out;
1129 }
1130
e8b8e97f 1131 /* Translate Linux '/' into Windows '\'. */
82cae269
KK		 1132 for (i = 0; i < err; i++) {
1133 if (rp_name[i] == cpu_to_le16('/'))
1134 rp_name[i] = cpu_to_le16('\\');
1135 }
1136
1137 rp->ReparseTag = IO_REPARSE_TAG_SYMLINK;
1138 rp->ReparseDataLength =
1139 cpu_to_le16(*nsize - offsetof(struct REPARSE_DATA_BUFFER,
1140 SymbolicLinkReparseBuffer));
1141
e8b8e97f 1142 /* PrintName + SubstituteName. */
82cae269
KK		 1143 rs->SubstituteNameOffset = cpu_to_le16(sizeof(short) * err);
1144 rs->SubstituteNameLength = cpu_to_le16(sizeof(short) * err + 8);
1145 rs->PrintNameLength = rs->SubstituteNameOffset;
1146
1147 /*
e8b8e97f
KA		 1148 * TODO: Use relative path if possible to allow Windows to
1149 * parse this path.
1150 * 0-absolute path 1- relative path (SYMLINK_FLAG_RELATIVE).
82cae269
KK		 1151 */
1152 rs->Flags = 0;
1153
1154 memmove(rp_name + err + 4, rp_name, sizeof(short) * err);
1155
e8b8e97f 1156 /* Decorate SubstituteName. */
82cae269
KK		 1157 rp_name += err;
1158 rp_name[0] = cpu_to_le16('\\');
1159 rp_name[1] = cpu_to_le16('?');
1160 rp_name[2] = cpu_to_le16('?');
1161 rp_name[3] = cpu_to_le16('\\');
1162
1163 return rp;
1164out:
195c52bd 1165 kfree(rp);
82cae269
KK		 1166 return ERR_PTR(err);
1167}
1168
1169struct inode *ntfs_create_inode(struct user_namespace *mnt_userns,
1170 struct inode *dir, struct dentry *dentry,
1171 const struct cpu_str *uni, umode_t mode,
1172 dev_t dev, const char *symname, u32 size,
1173 struct ntfs_fnd *fnd)
1174{
1175 int err;
1176 struct super_block *sb = dir->i_sb;
1177 struct ntfs_sb_info *sbi = sb->s_fs_info;
1178 const struct qstr *name = &dentry->d_name;
1179 CLST ino = 0;
1180 struct ntfs_inode *dir_ni = ntfs_i(dir);
1181 struct ntfs_inode *ni = NULL;
1182 struct inode *inode = NULL;
1183 struct ATTRIB *attr;
1184 struct ATTR_STD_INFO5 *std5;
1185 struct ATTR_FILE_NAME *fname;
1186 struct MFT_REC *rec;
1187 u32 asize, dsize, sd_size;
1188 enum FILE_ATTRIBUTE fa;
1189 __le32 security_id = SECURITY_ID_INVALID;
1190 CLST vcn;
1191 const void *sd;
1192 u16 t16, nsize = 0, aid = 0;
1193 struct INDEX_ROOT *root, *dir_root;
1194 struct NTFS_DE *e, *new_de = NULL;
1195 struct REPARSE_DATA_BUFFER *rp = NULL;
1196 bool rp_inserted = false;
1197
d562e901
KK		 1198 ni_lock_dir(dir_ni);
1199
82cae269 1200 dir_root = indx_get_root(&dir_ni->dir, dir_ni, NULL, NULL);
d562e901
KK		 1201 if (!dir_root) {
1202 err = -EINVAL;
1203 goto out1;
1204 }
82cae269
KK		 1205
1206 if (S_ISDIR(mode)) {
d3624466 1207 /* Use parent's directory attributes. */
82cae269
KK		 1208 fa = dir_ni->std_fa | FILE_ATTRIBUTE_DIRECTORY |
1209 FILE_ATTRIBUTE_ARCHIVE;
1210 /*
d3624466
KK		 1211 * By default child directory inherits parent attributes.
1212 * Root directory is hidden + system.
1213 * Make an exception for children in root.
82cae269
KK		 1214 */
1215 if (dir->i_ino == MFT_REC_ROOT)
1216 fa &= ~(FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM);
1217 } else if (S_ISLNK(mode)) {
1218 /* It is good idea that link should be the same type (file/dir) as target */
1219 fa = FILE_ATTRIBUTE_REPARSE_POINT;
1220
1221 /*
d3624466
KK		 1222 * Linux: there are dir/file/symlink and so on.
1223 * NTFS: symlinks are "dir + reparse" or "file + reparse"
82cae269
KK		 1224 * It is good idea to create:
1225 * dir + reparse if 'symname' points to directory
1226 * or
1227 * file + reparse if 'symname' points to file
e8b8e97f 1228 * Unfortunately kern_path hangs if symname contains 'dir'.
82cae269
KK		 1229 */
1230
1231 /*
1232 * struct path path;
1233 *
1234 * if (!kern_path(symname, LOOKUP_FOLLOW, &path)){
1235 * struct inode *target = d_inode(path.dentry);
1236 *
1237 * if (S_ISDIR(target->i_mode))
1238 * fa |= FILE_ATTRIBUTE_DIRECTORY;
1239 * // if ( target->i_sb == sb ){
1240 * // use relative path?
1241 * // }
1242 * path_put(&path);
1243 * }
1244 */
1245 } else if (S_ISREG(mode)) {
564c97bd 1246 if (sbi->options->sparse) {
e8b8e97f 1247 /* Sparsed regular file, cause option 'sparse'. */
82cae269
KK		 1248 fa = FILE_ATTRIBUTE_SPARSE_FILE |
1249 FILE_ATTRIBUTE_ARCHIVE;
1250 } else if (dir_ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) {
e8b8e97f 1251 /* Compressed regular file, if parent is compressed. */
82cae269
KK		 1252 fa = FILE_ATTRIBUTE_COMPRESSED | FILE_ATTRIBUTE_ARCHIVE;
1253 } else {
e8b8e97f 1254 /* Regular file, default attributes. */
82cae269
KK		 1255 fa = FILE_ATTRIBUTE_ARCHIVE;
1256 }
1257 } else {
1258 fa = FILE_ATTRIBUTE_ARCHIVE;
1259 }
1260
1261 if (!(mode & 0222))
1262 fa |= FILE_ATTRIBUTE_READONLY;
1263
e8b8e97f 1264 /* Allocate PATH_MAX bytes. */
82cae269
KK		 1265 new_de = __getname();
1266 if (!new_de) {
1267 err = -ENOMEM;
1268 goto out1;
1269 }
1270
e8b8e97f 1271 /* Mark rw ntfs as dirty. it will be cleared at umount. */
82cae269
KK		 1272 ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
1273
e8b8e97f 1274 /* Step 1: allocate and fill new mft record. */
82cae269
KK		 1275 err = ntfs_look_free_mft(sbi, &ino, false, NULL, NULL);
1276 if (err)
1277 goto out2;
1278
1279 ni = ntfs_new_inode(sbi, ino, fa & FILE_ATTRIBUTE_DIRECTORY);
1280 if (IS_ERR(ni)) {
1281 err = PTR_ERR(ni);
1282 ni = NULL;
1283 goto out3;
1284 }
1285 inode = &ni->vfs_inode;
1286 inode_init_owner(mnt_userns, inode, dir, mode);
78ab59fe 1287 mode = inode->i_mode;
82cae269
KK		 1288
1289 inode->i_atime = inode->i_mtime = inode->i_ctime = ni->i_crtime =
1290 current_time(inode);
1291
1292 rec = ni->mi.mrec;
1293 rec->hard_links = cpu_to_le16(1);
1294 attr = Add2Ptr(rec, le16_to_cpu(rec->attr_off));
1295
e8b8e97f 1296 /* Get default security id. */
82cae269
KK		 1297 sd = s_default_security;
1298 sd_size = sizeof(s_default_security);
1299
1300 if (is_ntfs3(sbi)) {
1301 security_id = dir_ni->std_security_id;
1302 if (le32_to_cpu(security_id) < SECURITY_ID_FIRST) {
1303 security_id = sbi->security.def_security_id;
1304
1305 if (security_id == SECURITY_ID_INVALID &&
1306 !ntfs_insert_security(sbi, sd, sd_size,
1307 &security_id, NULL))
1308 sbi->security.def_security_id = security_id;
1309 }
1310 }
1311
e8b8e97f 1312 /* Insert standard info. */
82cae269
KK		 1313 std5 = Add2Ptr(attr, SIZEOF_RESIDENT);
1314
1315 if (security_id == SECURITY_ID_INVALID) {
1316 dsize = sizeof(struct ATTR_STD_INFO);
1317 } else {
1318 dsize = sizeof(struct ATTR_STD_INFO5);
1319 std5->security_id = security_id;
1320 ni->std_security_id = security_id;
1321 }
1322 asize = SIZEOF_RESIDENT + dsize;
1323
1324 attr->type = ATTR_STD;
1325 attr->size = cpu_to_le32(asize);
1326 attr->id = cpu_to_le16(aid++);
1327 attr->res.data_off = SIZEOF_RESIDENT_LE;
1328 attr->res.data_size = cpu_to_le32(dsize);
1329
1330 std5->cr_time = std5->m_time = std5->c_time = std5->a_time =
1331 kernel2nt(&inode->i_atime);
1332
1333 ni->std_fa = fa;
1334 std5->fa = fa;
1335
1336 attr = Add2Ptr(attr, asize);
1337
e8b8e97f 1338 /* Insert file name. */
82cae269
KK		 1339 err = fill_name_de(sbi, new_de, name, uni);
1340 if (err)
1341 goto out4;
1342
1343 mi_get_ref(&ni->mi, &new_de->ref);
1344
1345 fname = (struct ATTR_FILE_NAME *)(new_de + 1);
1346 mi_get_ref(&dir_ni->mi, &fname->home);
1347 fname->dup.cr_time = fname->dup.m_time = fname->dup.c_time =
1348 fname->dup.a_time = std5->cr_time;
1349 fname->dup.alloc_size = fname->dup.data_size = 0;
1350 fname->dup.fa = std5->fa;
1351 fname->dup.ea_size = fname->dup.reparse = 0;
1352
1353 dsize = le16_to_cpu(new_de->key_size);
fa3cacf5 1354 asize = ALIGN(SIZEOF_RESIDENT + dsize, 8);
82cae269
KK		 1355
1356 attr->type = ATTR_NAME;
1357 attr->size = cpu_to_le32(asize);
1358 attr->res.data_off = SIZEOF_RESIDENT_LE;
1359 attr->res.flags = RESIDENT_FLAG_INDEXED;
1360 attr->id = cpu_to_le16(aid++);
1361 attr->res.data_size = cpu_to_le32(dsize);
1362 memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), fname, dsize);
1363
1364 attr = Add2Ptr(attr, asize);
1365
1366 if (security_id == SECURITY_ID_INVALID) {
e8b8e97f 1367 /* Insert security attribute. */
fa3cacf5 1368 asize = SIZEOF_RESIDENT + ALIGN(sd_size, 8);
82cae269
KK		 1369
1370 attr->type = ATTR_SECURE;
1371 attr->size = cpu_to_le32(asize);
1372 attr->id = cpu_to_le16(aid++);
1373 attr->res.data_off = SIZEOF_RESIDENT_LE;
1374 attr->res.data_size = cpu_to_le32(sd_size);
1375 memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), sd, sd_size);
1376
1377 attr = Add2Ptr(attr, asize);
1378 }
1379
78ab59fe 1380 attr->id = cpu_to_le16(aid++);
82cae269
KK		 1381 if (fa & FILE_ATTRIBUTE_DIRECTORY) {
1382 /*
e8b8e97f
KA		 1383 * Regular directory or symlink to directory.
1384 * Create root attribute.
82cae269
KK		 1385 */
1386 dsize = sizeof(struct INDEX_ROOT) + sizeof(struct NTFS_DE);
1387 asize = sizeof(I30_NAME) + SIZEOF_RESIDENT + dsize;
1388
1389 attr->type = ATTR_ROOT;
1390 attr->size = cpu_to_le32(asize);
82cae269
KK		 1391
1392 attr->name_len = ARRAY_SIZE(I30_NAME);
1393 attr->name_off = SIZEOF_RESIDENT_LE;
1394 attr->res.data_off =
1395 cpu_to_le16(sizeof(I30_NAME) + SIZEOF_RESIDENT);
1396 attr->res.data_size = cpu_to_le32(dsize);
1397 memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), I30_NAME,
1398 sizeof(I30_NAME));
1399
1400 root = Add2Ptr(attr, sizeof(I30_NAME) + SIZEOF_RESIDENT);
1401 memcpy(root, dir_root, offsetof(struct INDEX_ROOT, ihdr));
1402 root->ihdr.de_off =
1403 cpu_to_le32(sizeof(struct INDEX_HDR)); // 0x10
1404 root->ihdr.used = cpu_to_le32(sizeof(struct INDEX_HDR) +
1405 sizeof(struct NTFS_DE));
1406 root->ihdr.total = root->ihdr.used;
1407
1408 e = Add2Ptr(root, sizeof(struct INDEX_ROOT));
1409 e->size = cpu_to_le16(sizeof(struct NTFS_DE));
1410 e->flags = NTFS_IE_LAST;
1411 } else if (S_ISLNK(mode)) {
1412 /*
e8b8e97f
KA		 1413 * Symlink to file.
1414 * Create empty resident data attribute.
82cae269
KK		 1415 */
1416 asize = SIZEOF_RESIDENT;
1417
e8b8e97f 1418 /* Insert empty ATTR_DATA */
82cae269
KK		 1419 attr->type = ATTR_DATA;
1420 attr->size = cpu_to_le32(SIZEOF_RESIDENT);
82cae269
KK		 1421 attr->name_off = SIZEOF_RESIDENT_LE;
1422 attr->res.data_off = SIZEOF_RESIDENT_LE;
78ab59fe 1423 } else if (S_ISREG(mode)) {
82cae269 1424 /*
78ab59fe 1425 * Regular file. Create empty non resident data attribute.
82cae269
KK		 1426 */
1427 attr->type = ATTR_DATA;
78ab59fe
KK		 1428 attr->non_res = 1;
1429 attr->nres.evcn = cpu_to_le64(-1ll);
1430 if (fa & FILE_ATTRIBUTE_SPARSE_FILE) {
1431 attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8);
1432 attr->name_off = SIZEOF_NONRESIDENT_EX_LE;
1433 attr->flags = ATTR_FLAG_SPARSED;
1434 asize = SIZEOF_NONRESIDENT_EX + 8;
1435 } else if (fa & FILE_ATTRIBUTE_COMPRESSED) {
1436 attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8);
1437 attr->name_off = SIZEOF_NONRESIDENT_EX_LE;
1438 attr->flags = ATTR_FLAG_COMPRESSED;
1439 attr->nres.c_unit = COMPRESSION_UNIT;
1440 asize = SIZEOF_NONRESIDENT_EX + 8;
82cae269 1441 } else {
78ab59fe
KK		 1442 attr->size = cpu_to_le32(SIZEOF_NONRESIDENT + 8);
1443 attr->name_off = SIZEOF_NONRESIDENT_LE;
1444 asize = SIZEOF_NONRESIDENT + 8;
82cae269 1445 }
78ab59fe
KK		 1446 attr->nres.run_off = attr->name_off;
1447 } else {
1448 /*
1449 * Node. Create empty resident data attribute.
1450 */
1451 attr->type = ATTR_DATA;
1452 attr->size = cpu_to_le32(SIZEOF_RESIDENT);
1453 attr->name_off = SIZEOF_RESIDENT_LE;
1454 if (fa & FILE_ATTRIBUTE_SPARSE_FILE)
1455 attr->flags = ATTR_FLAG_SPARSED;
1456 else if (fa & FILE_ATTRIBUTE_COMPRESSED)
1457 attr->flags = ATTR_FLAG_COMPRESSED;
1458 attr->res.data_off = SIZEOF_RESIDENT_LE;
1459 asize = SIZEOF_RESIDENT;
1460 ni->ni_flags |= NI_FLAG_RESIDENT;
82cae269
KK		 1461 }
1462
1463 if (S_ISDIR(mode)) {
1464 ni->ni_flags |= NI_FLAG_DIR;
1465 err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30);
1466 if (err)
1467 goto out4;
1468 } else if (S_ISLNK(mode)) {
1469 rp = ntfs_create_reparse_buffer(sbi, symname, size, &nsize);
1470
1471 if (IS_ERR(rp)) {
1472 err = PTR_ERR(rp);
1473 rp = NULL;
1474 goto out4;
1475 }
1476
1477 /*
e8b8e97f 1478 * Insert ATTR_REPARSE.
82cae269
KK		 1479 */
1480 attr = Add2Ptr(attr, asize);
1481 attr->type = ATTR_REPARSE;
1482 attr->id = cpu_to_le16(aid++);
1483
e8b8e97f 1484 /* Resident or non resident? */
fa3cacf5 1485 asize = ALIGN(SIZEOF_RESIDENT + nsize, 8);
82cae269
KK		 1486 t16 = PtrOffset(rec, attr);
1487
14a98119
KK		 1488 /*
1489 * Below function 'ntfs_save_wsl_perm' requires 0x78 bytes.
1490 * It is good idea to keep extened attributes resident.
1491 */
78ab59fe 1492 if (asize + t16 + 0x78 + 8 > sbi->record_size) {
82cae269
KK		 1493 CLST alen;
1494 CLST clst = bytes_to_cluster(sbi, nsize);
1495
e8b8e97f 1496 /* Bytes per runs. */
82cae269
KK		 1497 t16 = sbi->record_size - t16 - SIZEOF_NONRESIDENT;
1498
1499 attr->non_res = 1;
1500 attr->nres.evcn = cpu_to_le64(clst - 1);
1501 attr->name_off = SIZEOF_NONRESIDENT_LE;
1502 attr->nres.run_off = attr->name_off;
1503 attr->nres.data_size = cpu_to_le64(nsize);
1504 attr->nres.valid_size = attr->nres.data_size;
1505 attr->nres.alloc_size =
1506 cpu_to_le64(ntfs_up_cluster(sbi, nsize));
1507
1508 err = attr_allocate_clusters(sbi, &ni->file.run, 0, 0,
1509 clst, NULL, 0, &alen, 0,
1510 NULL);
1511 if (err)
1512 goto out5;
1513
1514 err = run_pack(&ni->file.run, 0, clst,
1515 Add2Ptr(attr, SIZEOF_NONRESIDENT), t16,
1516 &vcn);
1517 if (err < 0)
1518 goto out5;
1519
1520 if (vcn != clst) {
1521 err = -EINVAL;
1522 goto out5;
1523 }
1524
fa3cacf5 1525 asize = SIZEOF_NONRESIDENT + ALIGN(err, 8);
82cae269
KK		 1526 } else {
1527 attr->res.data_off = SIZEOF_RESIDENT_LE;
1528 attr->res.data_size = cpu_to_le32(nsize);
1529 memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), rp, nsize);
82cae269
KK		 1530 nsize = 0;
1531 }
14a98119
KK		 1532 /* Size of symlink equals the length of input string. */
1533 inode->i_size = size;
82cae269
KK		 1534
1535 attr->size = cpu_to_le32(asize);
1536
1537 err = ntfs_insert_reparse(sbi, IO_REPARSE_TAG_SYMLINK,
1538 &new_de->ref);
1539 if (err)
1540 goto out5;
1541
1542 rp_inserted = true;
1543 }
1544
1545 attr = Add2Ptr(attr, asize);
1546 attr->type = ATTR_END;
1547
1548 rec->used = cpu_to_le32(PtrOffset(rec, attr) + 8);
1549 rec->next_attr_id = cpu_to_le16(aid);
1550
e8b8e97f 1551 /* Step 2: Add new name in index. */
78ab59fe 1552 err = indx_insert_entry(&dir_ni->dir, dir_ni, new_de, sbi, fnd, 0);
82cae269
KK		 1553 if (err)
1554 goto out6;
1555
d562e901
KK		 1556 /* Unlock parent directory before ntfs_init_acl. */
1557 ni_unlock(dir_ni);
1558
82cae269
KK		 1559 inode->i_generation = le16_to_cpu(rec->seq);
1560
1561 dir->i_mtime = dir->i_ctime = inode->i_atime;
1562
1563 if (S_ISDIR(mode)) {
82cae269
KK		 1564 inode->i_op = &ntfs_dir_inode_operations;
1565 inode->i_fop = &ntfs_dir_operations;
1566 } else if (S_ISLNK(mode)) {
1567 inode->i_op = &ntfs_link_inode_operations;
1568 inode->i_fop = NULL;
1569 inode->i_mapping->a_ops = &ntfs_aops;
14a98119
KK		 1570 inode->i_size = size;
1571 inode_nohighmem(inode);
82cae269
KK		 1572 } else if (S_ISREG(mode)) {
1573 inode->i_op = &ntfs_file_inode_operations;
1574 inode->i_fop = &ntfs_file_operations;
1575 inode->i_mapping->a_ops =
1576 is_compressed(ni) ? &ntfs_aops_cmpr : &ntfs_aops;
1577 init_rwsem(&ni->file.run_lock);
1578 } else {
1579 inode->i_op = &ntfs_special_inode_operations;
1580 init_special_inode(inode, mode, dev);
1581 }
1582
1583#ifdef CONFIG_NTFS3_FS_POSIX_ACL
1584 if (!S_ISLNK(mode) && (sb->s_flags & SB_POSIXACL)) {
1585 err = ntfs_init_acl(mnt_userns, inode, dir);
1586 if (err)
6c1ee4d3 1587 goto out7;
82cae269
KK		 1588 } else
1589#endif
1590 {
1591 inode->i_flags |= S_NOSEC;
1592 }
1593
e8b8e97f 1594 /* Write non resident data. */
82cae269 1595 if (nsize) {
63544672 1596 err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rp, nsize, 0);
82cae269
KK		 1597 if (err)
1598 goto out7;
1599 }
1600
e8b8e97f
KA		 1601 /*
1602 * Call 'd_instantiate' after inode->i_op is set
1603 * but before finish_open.
1604 */
82cae269
KK		 1605 d_instantiate(dentry, inode);
1606
1607 ntfs_save_wsl_perm(inode);
82cae269 1608 mark_inode_dirty(dir);
78ab59fe 1609 mark_inode_dirty(inode);
82cae269 1610
e8b8e97f 1611 /* Normal exit. */
82cae269
KK		 1612 goto out2;
1613
1614out7:
1615
e8b8e97f 1616 /* Undo 'indx_insert_entry'. */
d562e901 1617 ni_lock_dir(dir_ni);
82cae269
KK		 1618 indx_delete_entry(&dir_ni->dir, dir_ni, new_de + 1,
1619 le16_to_cpu(new_de->key_size), sbi);
d562e901 1620 /* ni_unlock(dir_ni); will be called later. */
82cae269
KK		 1621out6:
1622 if (rp_inserted)
1623 ntfs_remove_reparse(sbi, IO_REPARSE_TAG_SYMLINK, &new_de->ref);
1624
1625out5:
1626 if (S_ISDIR(mode) || run_is_empty(&ni->file.run))
1627 goto out4;
1628
1629 run_deallocate(sbi, &ni->file.run, false);
1630
1631out4:
1632 clear_rec_inuse(rec);
1633 clear_nlink(inode);
1634 ni->mi.dirty = false;
1635 discard_new_inode(inode);
1636out3:
1637 ntfs_mark_rec_free(sbi, ino);
1638
1639out2:
1640 __putname(new_de);
195c52bd 1641 kfree(rp);
82cae269
KK		 1642
1643out1:
d562e901
KK		 1644 if (err) {
1645 ni_unlock(dir_ni);
82cae269 1646 return ERR_PTR(err);
d562e901 1647 }
82cae269
KK		 1648
1649 unlock_new_inode(inode);
1650
1651 return inode;
1652}
1653
1654int ntfs_link_inode(struct inode *inode, struct dentry *dentry)
1655{
1656 int err;
82cae269 1657 struct ntfs_inode *ni = ntfs_i(inode);
78ab59fe
KK		 1658 struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
1659 struct NTFS_DE *de;
1660 struct ATTR_FILE_NAME *de_name;
82cae269 1661
e8b8e97f 1662 /* Allocate PATH_MAX bytes. */
78ab59fe
KK		 1663 de = __getname();
1664 if (!de)
82cae269
KK		 1665 return -ENOMEM;
1666
78ab59fe
KK		 1667 /* Mark rw ntfs as dirty. It will be cleared at umount. */
1668 ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
82cae269 1669
78ab59fe
KK		 1670 /* Construct 'de'. */
1671 err = fill_name_de(sbi, de, &dentry->d_name, NULL);
82cae269
KK		 1672 if (err)
1673 goto out;
1674
78ab59fe
KK		 1675 de_name = (struct ATTR_FILE_NAME *)(de + 1);
1676 /* Fill duplicate info. */
1677 de_name->dup.cr_time = de_name->dup.m_time = de_name->dup.c_time =
1678 de_name->dup.a_time = kernel2nt(&inode->i_ctime);
1679 de_name->dup.alloc_size = de_name->dup.data_size =
1680 cpu_to_le64(inode->i_size);
1681 de_name->dup.fa = ni->std_fa;
1682 de_name->dup.ea_size = de_name->dup.reparse = 0;
82cae269 1683
78ab59fe 1684 err = ni_add_name(ntfs_i(d_inode(dentry->d_parent)), ni, de);
82cae269 1685out:
78ab59fe 1686 __putname(de);
82cae269
KK		 1687 return err;
1688}
1689
1690/*
1691 * ntfs_unlink_inode
1692 *
1693 * inode_operations::unlink
1694 * inode_operations::rmdir
1695 */
1696int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry)
1697{
1698 int err;
78ab59fe 1699 struct ntfs_sb_info *sbi = dir->i_sb->s_fs_info;
82cae269
KK		 1700 struct inode *inode = d_inode(dentry);
1701 struct ntfs_inode *ni = ntfs_i(inode);
82cae269 1702 struct ntfs_inode *dir_ni = ntfs_i(dir);
78ab59fe
KK		 1703 struct NTFS_DE *de, *de2 = NULL;
1704 int undo_remove;
82cae269 1705
78ab59fe 1706 if (ntfs_is_meta_file(sbi, ni->mi.rno))
82cae269
KK		 1707 return -EINVAL;
1708
78ab59fe
KK		 1709 /* Allocate PATH_MAX bytes. */
1710 de = __getname();
1711 if (!de)
1712 return -ENOMEM;
1713
82cae269
KK		 1714 ni_lock(ni);
1715
78ab59fe 1716 if (S_ISDIR(inode->i_mode) && !dir_is_empty(inode)) {
82cae269 1717 err = -ENOTEMPTY;
78ab59fe 1718 goto out;
82cae269
KK		 1719 }
1720
78ab59fe 1721 err = fill_name_de(sbi, de, &dentry->d_name, NULL);
82cae269 1722 if (err < 0)
78ab59fe 1723 goto out;
82cae269 1724
78ab59fe
KK		 1725 undo_remove = 0;
1726 err = ni_remove_name(dir_ni, ni, de, &de2, &undo_remove);
82cae269 1727
78ab59fe 1728 if (!err) {
82cae269 1729 drop_nlink(inode);
78ab59fe
KK		 1730 dir->i_mtime = dir->i_ctime = current_time(dir);
1731 mark_inode_dirty(dir);
1732 inode->i_ctime = dir->i_ctime;
1733 if (inode->i_nlink)
1734 mark_inode_dirty(inode);
1735 } else if (!ni_remove_name_undo(dir_ni, ni, de, de2, undo_remove)) {
82cae269 1736 make_bad_inode(inode);
78ab59fe
KK		 1737 ntfs_inode_err(inode, "failed to undo unlink");
1738 ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
1739 } else {
1740 if (ni_is_dirty(dir))
1741 mark_inode_dirty(dir);
1742 if (ni_is_dirty(inode))
1743 mark_inode_dirty(inode);
82cae269
KK		 1744 }
1745
78ab59fe 1746out:
82cae269 1747 ni_unlock(ni);
78ab59fe 1748 __putname(de);
82cae269
KK		 1749 return err;
1750}
1751
1752void ntfs_evict_inode(struct inode *inode)
1753{
1754 truncate_inode_pages_final(&inode->i_data);
1755
1756 if (inode->i_nlink)
1757 _ni_write_inode(inode, inode_needs_sync(inode));
1758
1759 invalidate_inode_buffers(inode);
1760 clear_inode(inode);
1761
1762 ni_clear(ntfs_i(inode));
1763}
1764
1765static noinline int ntfs_readlink_hlp(struct inode *inode, char *buffer,
1766 int buflen)
1767{
4dbe8e44 1768 int i, err = -EINVAL;
82cae269
KK		 1769 struct ntfs_inode *ni = ntfs_i(inode);
1770 struct super_block *sb = inode->i_sb;
1771 struct ntfs_sb_info *sbi = sb->s_fs_info;
4dbe8e44
KK		 1772 u64 size;
1773 u16 ulen = 0;
82cae269
KK		 1774 void *to_free = NULL;
1775 struct REPARSE_DATA_BUFFER *rp;
4dbe8e44 1776 const __le16 *uname;
82cae269
KK		 1777 struct ATTRIB *attr;
1778
e8b8e97f 1779 /* Reparse data present. Try to parse it. */
82cae269
KK		 1780 static_assert(!offsetof(struct REPARSE_DATA_BUFFER, ReparseTag));
1781 static_assert(sizeof(u32) == sizeof(rp->ReparseTag));
1782
1783 *buffer = 0;
1784
82cae269 1785 attr = ni_find_attr(ni, NULL, NULL, ATTR_REPARSE, NULL, 0, NULL, NULL);
4dbe8e44 1786 if (!attr)
82cae269 1787 goto out;
82cae269
KK		 1788
1789 if (!attr->non_res) {
4dbe8e44
KK		 1790 rp = resident_data_ex(attr, sizeof(struct REPARSE_DATA_BUFFER));
1791 if (!rp)
82cae269 1792 goto out;
4dbe8e44 1793 size = le32_to_cpu(attr->res.data_size);
82cae269 1794 } else {
4dbe8e44
KK		 1795 size = le64_to_cpu(attr->nres.data_size);
1796 rp = NULL;
1797 }
1798
1799 if (size > sbi->reparse.max_size || size <= sizeof(u32))
1800 goto out;
1801
1802 if (!rp) {
1803 rp = kmalloc(size, GFP_NOFS);
82cae269
KK		 1804 if (!rp) {
1805 err = -ENOMEM;
1806 goto out;
1807 }
1808 to_free = rp;
4dbe8e44
KK		 1809 /* Read into temporal buffer. */
1810 err = ntfs_read_run_nb(sbi, &ni->file.run, 0, rp, size, NULL);
82cae269
KK		 1811 if (err)
1812 goto out;
1813 }
1814
e8b8e97f 1815 /* Microsoft Tag. */
82cae269
KK		 1816 switch (rp->ReparseTag) {
1817 case IO_REPARSE_TAG_MOUNT_POINT:
e8b8e97f 1818 /* Mount points and junctions. */
82cae269 1819 /* Can we use 'Rp->MountPointReparseBuffer.PrintNameLength'? */
4dbe8e44
KK		 1820 if (size <= offsetof(struct REPARSE_DATA_BUFFER,
1821 MountPointReparseBuffer.PathBuffer))
82cae269 1822 goto out;
4dbe8e44
KK		 1823 uname = Add2Ptr(rp,
1824 offsetof(struct REPARSE_DATA_BUFFER,
1825 MountPointReparseBuffer.PathBuffer) +
1826 le16_to_cpu(rp->MountPointReparseBuffer
1827 .PrintNameOffset));
1828 ulen = le16_to_cpu(rp->MountPointReparseBuffer.PrintNameLength);
82cae269
KK		 1829 break;
1830
1831 case IO_REPARSE_TAG_SYMLINK:
1832 /* FolderSymbolicLink */
1833 /* Can we use 'Rp->SymbolicLinkReparseBuffer.PrintNameLength'? */
4dbe8e44
KK		 1834 if (size <= offsetof(struct REPARSE_DATA_BUFFER,
1835 SymbolicLinkReparseBuffer.PathBuffer))
82cae269 1836 goto out;
4dbe8e44
KK		 1837 uname = Add2Ptr(
1838 rp, offsetof(struct REPARSE_DATA_BUFFER,
1839 SymbolicLinkReparseBuffer.PathBuffer) +
1840 le16_to_cpu(rp->SymbolicLinkReparseBuffer
1841 .PrintNameOffset));
1842 ulen = le16_to_cpu(
82cae269
KK		 1843 rp->SymbolicLinkReparseBuffer.PrintNameLength);
1844 break;
1845
1846 case IO_REPARSE_TAG_CLOUD:
1847 case IO_REPARSE_TAG_CLOUD_1:
1848 case IO_REPARSE_TAG_CLOUD_2:
1849 case IO_REPARSE_TAG_CLOUD_3:
1850 case IO_REPARSE_TAG_CLOUD_4:
1851 case IO_REPARSE_TAG_CLOUD_5:
1852 case IO_REPARSE_TAG_CLOUD_6:
1853 case IO_REPARSE_TAG_CLOUD_7:
1854 case IO_REPARSE_TAG_CLOUD_8:
1855 case IO_REPARSE_TAG_CLOUD_9:
1856 case IO_REPARSE_TAG_CLOUD_A:
1857 case IO_REPARSE_TAG_CLOUD_B:
1858 case IO_REPARSE_TAG_CLOUD_C:
1859 case IO_REPARSE_TAG_CLOUD_D:
1860 case IO_REPARSE_TAG_CLOUD_E:
1861 case IO_REPARSE_TAG_CLOUD_F:
1862 err = sizeof("OneDrive") - 1;
1863 if (err > buflen)
1864 err = buflen;
1865 memcpy(buffer, "OneDrive", err);
1866 goto out;
1867
1868 default:
1869 if (IsReparseTagMicrosoft(rp->ReparseTag)) {
d3624466 1870 /* Unknown Microsoft Tag. */
82cae269
KK		 1871 goto out;
1872 }
1873 if (!IsReparseTagNameSurrogate(rp->ReparseTag) ||
4dbe8e44 1874 size <= sizeof(struct REPARSE_POINT)) {
82cae269
KK		 1875 goto out;
1876 }
1877
e8b8e97f 1878 /* Users tag. */
4dbe8e44
KK		 1879 uname = Add2Ptr(rp, sizeof(struct REPARSE_POINT));
1880 ulen = le16_to_cpu(rp->ReparseDataLength) -
82cae269
KK		 1881 sizeof(struct REPARSE_POINT);
1882 }
1883
e8b8e97f 1884 /* Convert nlen from bytes to UNICODE chars. */
4dbe8e44 1885 ulen >>= 1;
82cae269 1886
e8b8e97f 1887 /* Check that name is available. */
4dbe8e44 1888 if (!ulen || uname + ulen > (__le16 *)Add2Ptr(rp, size))
82cae269
KK		 1889 goto out;
1890
e8b8e97f 1891 /* If name is already zero terminated then truncate it now. */
4dbe8e44
KK		 1892 if (!uname[ulen - 1])
1893 ulen -= 1;
82cae269 1894
4dbe8e44 1895 err = ntfs_utf16_to_nls(sbi, uname, ulen, buffer, buflen);
82cae269
KK		 1896
1897 if (err < 0)
1898 goto out;
1899
e8b8e97f 1900 /* Translate Windows '\' into Linux '/'. */
82cae269
KK		 1901 for (i = 0; i < err; i++) {
1902 if (buffer[i] == '\\')
1903 buffer[i] = '/';
1904 }
1905
e8b8e97f 1906 /* Always set last zero. */
82cae269
KK		 1907 buffer[err] = 0;
1908out:
195c52bd 1909 kfree(to_free);
82cae269
KK		 1910 return err;
1911}
1912
1913static const char *ntfs_get_link(struct dentry *de, struct inode *inode,
1914 struct delayed_call *done)
1915{
1916 int err;
1917 char *ret;
1918
1919 if (!de)
1920 return ERR_PTR(-ECHILD);
1921
1922 ret = kmalloc(PAGE_SIZE, GFP_NOFS);
1923 if (!ret)
1924 return ERR_PTR(-ENOMEM);
1925
1926 err = ntfs_readlink_hlp(inode, ret, PAGE_SIZE);
1927 if (err < 0) {
1928 kfree(ret);
1929 return ERR_PTR(err);
1930 }
1931
1932 set_delayed_call(done, kfree_link, ret);
1933
1934 return ret;
1935}
1936
1937// clang-format off
1938const struct inode_operations ntfs_link_inode_operations = {
1939 .get_link = ntfs_get_link,
1940 .setattr = ntfs3_setattr,
1941 .listxattr = ntfs_listxattr,
1942 .permission = ntfs_permission,
1943 .get_acl = ntfs_get_acl,
1944 .set_acl = ntfs_set_acl,
1945};
1946
1947const struct address_space_operations ntfs_aops = {
f132ab7d 1948 .read_folio = ntfs_read_folio,
82cae269
KK		 1949 .readahead = ntfs_readahead,
1950 .writepage = ntfs_writepage,
1951 .writepages = ntfs_writepages,
1952 .write_begin = ntfs_write_begin,
1953 .write_end = ntfs_write_end,
1954 .direct_IO = ntfs_direct_IO,
1955 .bmap = ntfs_bmap,
e621900a 1956 .dirty_folio = block_dirty_folio,
724bbe49 1957 .invalidate_folio = block_invalidate_folio,
82cae269
KK		 1958};
1959
1960const struct address_space_operations ntfs_aops_cmpr = {
f132ab7d 1961 .read_folio = ntfs_read_folio,
82cae269
KK		 1962 .readahead = ntfs_readahead,
1963};
1964// clang-format on
Linux 6.x block layer and io_uring tree(s)