Commit | Line | Data |
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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 | */ |
23 | static 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)) { | |
0e8235d2 | 84 | err = -ESTALE; |
82cae269 KK |
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 | ||
0e8235d2 KK |
95 | if (!is_rec_base(rec)) { |
96 | err = -EINVAL; | |
97 | goto out; | |
98 | } | |
82cae269 | 99 | |
e8b8e97f | 100 | /* Record should contain $I30 root. */ |
82cae269 KK |
101 | is_dir = rec->flags & RECORD_FLAG_DIR; |
102 | ||
98bea253 EL |
103 | /* MFT_REC_MFT is not a dir */ |
104 | if (is_dir && ino == MFT_REC_MFT) { | |
105 | err = -EINVAL; | |
106 | goto out; | |
107 | } | |
108 | ||
82cae269 KK |
109 | inode->i_generation = le16_to_cpu(rec->seq); |
110 | ||
e8b8e97f | 111 | /* Enumerate all struct Attributes MFT. */ |
82cae269 KK |
112 | le = NULL; |
113 | attr = NULL; | |
114 | ||
115 | /* | |
e8b8e97f | 116 | * To reduce tab pressure use goto instead of |
82cae269 KK |
117 | * while( (attr = ni_enum_attr_ex(ni, attr, &le, NULL) )) |
118 | */ | |
119 | next_attr: | |
120 | run = NULL; | |
121 | err = -EINVAL; | |
122 | attr = ni_enum_attr_ex(ni, attr, &le, NULL); | |
123 | if (!attr) | |
124 | goto end_enum; | |
125 | ||
126 | if (le && le->vcn) { | |
e8b8e97f | 127 | /* This is non primary attribute segment. Ignore if not MFT. */ |
82cae269 KK |
128 | if (ino != MFT_REC_MFT || attr->type != ATTR_DATA) |
129 | goto next_attr; | |
130 | ||
131 | run = &ni->file.run; | |
132 | asize = le32_to_cpu(attr->size); | |
133 | goto attr_unpack_run; | |
134 | } | |
135 | ||
136 | roff = attr->non_res ? 0 : le16_to_cpu(attr->res.data_off); | |
137 | rsize = attr->non_res ? 0 : le32_to_cpu(attr->res.data_size); | |
138 | asize = le32_to_cpu(attr->size); | |
139 | ||
0addfb1c KK |
140 | /* |
141 | * Really this check was done in 'ni_enum_attr_ex' -> ... 'mi_enum_attr'. | |
142 | * There not critical to check this case again | |
143 | */ | |
144 | if (attr->name_len && | |
145 | sizeof(short) * attr->name_len + le16_to_cpu(attr->name_off) > | |
146 | asize) | |
4f1dc7d9 EL |
147 | goto out; |
148 | ||
019d22eb AN |
149 | if (attr->non_res) { |
150 | t64 = le64_to_cpu(attr->nres.alloc_size); | |
151 | if (le64_to_cpu(attr->nres.data_size) > t64 || | |
152 | le64_to_cpu(attr->nres.valid_size) > t64) | |
153 | goto out; | |
154 | } | |
155 | ||
82cae269 KK |
156 | switch (attr->type) { |
157 | case ATTR_STD: | |
158 | if (attr->non_res || | |
159 | asize < sizeof(struct ATTR_STD_INFO) + roff || | |
160 | rsize < sizeof(struct ATTR_STD_INFO)) | |
161 | goto out; | |
162 | ||
163 | if (std5) | |
164 | goto next_attr; | |
165 | ||
166 | std5 = Add2Ptr(attr, roff); | |
167 | ||
168 | #ifdef STATX_BTIME | |
169 | nt2kernel(std5->cr_time, &ni->i_crtime); | |
170 | #endif | |
171 | nt2kernel(std5->a_time, &inode->i_atime); | |
172 | nt2kernel(std5->c_time, &inode->i_ctime); | |
173 | nt2kernel(std5->m_time, &inode->i_mtime); | |
174 | ||
175 | ni->std_fa = std5->fa; | |
176 | ||
177 | if (asize >= sizeof(struct ATTR_STD_INFO5) + roff && | |
178 | rsize >= sizeof(struct ATTR_STD_INFO5)) | |
179 | ni->std_security_id = std5->security_id; | |
180 | goto next_attr; | |
181 | ||
182 | case ATTR_LIST: | |
183 | if (attr->name_len || le || ino == MFT_REC_LOG) | |
184 | goto out; | |
185 | ||
186 | err = ntfs_load_attr_list(ni, attr); | |
187 | if (err) | |
188 | goto out; | |
189 | ||
190 | le = NULL; | |
191 | attr = NULL; | |
192 | goto next_attr; | |
193 | ||
194 | case ATTR_NAME: | |
195 | if (attr->non_res || asize < SIZEOF_ATTRIBUTE_FILENAME + roff || | |
196 | rsize < SIZEOF_ATTRIBUTE_FILENAME) | |
197 | goto out; | |
198 | ||
199 | fname = Add2Ptr(attr, roff); | |
200 | if (fname->type == FILE_NAME_DOS) | |
201 | goto next_attr; | |
202 | ||
203 | names += 1; | |
204 | if (name && name->len == fname->name_len && | |
205 | !ntfs_cmp_names_cpu(name, (struct le_str *)&fname->name_len, | |
206 | NULL, false)) | |
207 | is_match = true; | |
208 | ||
209 | goto next_attr; | |
210 | ||
211 | case ATTR_DATA: | |
212 | if (is_dir) { | |
e8b8e97f | 213 | /* Ignore data attribute in dir record. */ |
82cae269 KK |
214 | goto next_attr; |
215 | } | |
216 | ||
217 | if (ino == MFT_REC_BADCLUST && !attr->non_res) | |
218 | goto next_attr; | |
219 | ||
220 | if (attr->name_len && | |
221 | ((ino != MFT_REC_BADCLUST || !attr->non_res || | |
222 | attr->name_len != ARRAY_SIZE(BAD_NAME) || | |
223 | memcmp(attr_name(attr), BAD_NAME, sizeof(BAD_NAME))) && | |
224 | (ino != MFT_REC_SECURE || !attr->non_res || | |
225 | attr->name_len != ARRAY_SIZE(SDS_NAME) || | |
226 | memcmp(attr_name(attr), SDS_NAME, sizeof(SDS_NAME))))) { | |
e8b8e97f | 227 | /* File contains stream attribute. Ignore it. */ |
82cae269 KK |
228 | goto next_attr; |
229 | } | |
230 | ||
231 | if (is_attr_sparsed(attr)) | |
232 | ni->std_fa |= FILE_ATTRIBUTE_SPARSE_FILE; | |
233 | else | |
234 | ni->std_fa &= ~FILE_ATTRIBUTE_SPARSE_FILE; | |
235 | ||
236 | if (is_attr_compressed(attr)) | |
237 | ni->std_fa |= FILE_ATTRIBUTE_COMPRESSED; | |
238 | else | |
239 | ni->std_fa &= ~FILE_ATTRIBUTE_COMPRESSED; | |
240 | ||
241 | if (is_attr_encrypted(attr)) | |
242 | ni->std_fa |= FILE_ATTRIBUTE_ENCRYPTED; | |
243 | else | |
244 | ni->std_fa &= ~FILE_ATTRIBUTE_ENCRYPTED; | |
245 | ||
246 | if (!attr->non_res) { | |
247 | ni->i_valid = inode->i_size = rsize; | |
248 | inode_set_bytes(inode, rsize); | |
82cae269 KK |
249 | } |
250 | ||
564c97bd | 251 | mode = S_IFREG | (0777 & sbi->options->fs_fmask_inv); |
82cae269 KK |
252 | |
253 | if (!attr->non_res) { | |
254 | ni->ni_flags |= NI_FLAG_RESIDENT; | |
255 | goto next_attr; | |
256 | } | |
257 | ||
258 | inode_set_bytes(inode, attr_ondisk_size(attr)); | |
259 | ||
260 | ni->i_valid = le64_to_cpu(attr->nres.valid_size); | |
261 | inode->i_size = le64_to_cpu(attr->nres.data_size); | |
262 | if (!attr->nres.alloc_size) | |
263 | goto next_attr; | |
264 | ||
96de65a9 | 265 | run = ino == MFT_REC_BITMAP ? &sbi->used.bitmap.run : |
f0377761 | 266 | &ni->file.run; |
82cae269 KK |
267 | break; |
268 | ||
269 | case ATTR_ROOT: | |
270 | if (attr->non_res) | |
271 | goto out; | |
272 | ||
273 | root = Add2Ptr(attr, roff); | |
82cae269 KK |
274 | |
275 | if (attr->name_len != ARRAY_SIZE(I30_NAME) || | |
276 | memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME))) | |
277 | goto next_attr; | |
278 | ||
279 | if (root->type != ATTR_NAME || | |
280 | root->rule != NTFS_COLLATION_TYPE_FILENAME) | |
281 | goto out; | |
282 | ||
283 | if (!is_dir) | |
284 | goto next_attr; | |
285 | ||
bfa434c6 | 286 | is_root = true; |
82cae269 KK |
287 | ni->ni_flags |= NI_FLAG_DIR; |
288 | ||
289 | err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30); | |
290 | if (err) | |
291 | goto out; | |
292 | ||
96de65a9 | 293 | mode = sb->s_root ? |
f0377761 KK |
294 | (S_IFDIR | (0777 & sbi->options->fs_dmask_inv)) : |
295 | (S_IFDIR | 0777); | |
82cae269 KK |
296 | goto next_attr; |
297 | ||
298 | case ATTR_ALLOC: | |
299 | if (!is_root || attr->name_len != ARRAY_SIZE(I30_NAME) || | |
300 | memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME))) | |
301 | goto next_attr; | |
302 | ||
303 | inode->i_size = le64_to_cpu(attr->nres.data_size); | |
304 | ni->i_valid = le64_to_cpu(attr->nres.valid_size); | |
305 | inode_set_bytes(inode, le64_to_cpu(attr->nres.alloc_size)); | |
306 | ||
307 | run = &ni->dir.alloc_run; | |
308 | break; | |
309 | ||
310 | case ATTR_BITMAP: | |
311 | if (ino == MFT_REC_MFT) { | |
312 | if (!attr->non_res) | |
313 | goto out; | |
314 | #ifndef CONFIG_NTFS3_64BIT_CLUSTER | |
315 | /* 0x20000000 = 2^32 / 8 */ | |
316 | if (le64_to_cpu(attr->nres.alloc_size) >= 0x20000000) | |
317 | goto out; | |
318 | #endif | |
319 | run = &sbi->mft.bitmap.run; | |
320 | break; | |
321 | } else if (is_dir && attr->name_len == ARRAY_SIZE(I30_NAME) && | |
322 | !memcmp(attr_name(attr), I30_NAME, | |
323 | sizeof(I30_NAME)) && | |
324 | attr->non_res) { | |
325 | run = &ni->dir.bitmap_run; | |
326 | break; | |
327 | } | |
328 | goto next_attr; | |
329 | ||
330 | case ATTR_REPARSE: | |
331 | if (attr->name_len) | |
332 | goto next_attr; | |
333 | ||
334 | rp_fa = ni_parse_reparse(ni, attr, &rp); | |
335 | switch (rp_fa) { | |
336 | case REPARSE_LINK: | |
22b05f1a KK |
337 | /* |
338 | * Normal symlink. | |
339 | * Assume one unicode symbol == one utf8. | |
340 | */ | |
341 | inode->i_size = le16_to_cpu(rp.SymbolicLinkReparseBuffer | |
342 | .PrintNameLength) / | |
343 | sizeof(u16); | |
82cae269 | 344 | |
82cae269 KK |
345 | ni->i_valid = inode->i_size; |
346 | ||
e8b8e97f | 347 | /* Clear directory bit. */ |
82cae269 KK |
348 | if (ni->ni_flags & NI_FLAG_DIR) { |
349 | indx_clear(&ni->dir); | |
350 | memset(&ni->dir, 0, sizeof(ni->dir)); | |
351 | ni->ni_flags &= ~NI_FLAG_DIR; | |
352 | } else { | |
353 | run_close(&ni->file.run); | |
354 | } | |
355 | mode = S_IFLNK | 0777; | |
356 | is_dir = false; | |
357 | if (attr->non_res) { | |
358 | run = &ni->file.run; | |
e8b8e97f | 359 | goto attr_unpack_run; // Double break. |
82cae269 KK |
360 | } |
361 | break; | |
362 | ||
363 | case REPARSE_COMPRESSED: | |
364 | break; | |
365 | ||
366 | case REPARSE_DEDUPLICATED: | |
367 | break; | |
368 | } | |
369 | goto next_attr; | |
370 | ||
371 | case ATTR_EA_INFO: | |
372 | if (!attr->name_len && | |
373 | resident_data_ex(attr, sizeof(struct EA_INFO))) { | |
374 | ni->ni_flags |= NI_FLAG_EA; | |
375 | /* | |
376 | * ntfs_get_wsl_perm updates inode->i_uid, inode->i_gid, inode->i_mode | |
377 | */ | |
378 | inode->i_mode = mode; | |
379 | ntfs_get_wsl_perm(inode); | |
380 | mode = inode->i_mode; | |
381 | } | |
382 | goto next_attr; | |
383 | ||
384 | default: | |
385 | goto next_attr; | |
386 | } | |
387 | ||
388 | attr_unpack_run: | |
389 | roff = le16_to_cpu(attr->nres.run_off); | |
390 | ||
6db62086 EL |
391 | if (roff > asize) { |
392 | err = -EINVAL; | |
393 | goto out; | |
394 | } | |
395 | ||
82cae269 | 396 | t64 = le64_to_cpu(attr->nres.svcn); |
887bfc54 | 397 | |
82cae269 KK |
398 | err = run_unpack_ex(run, sbi, ino, t64, le64_to_cpu(attr->nres.evcn), |
399 | t64, Add2Ptr(attr, roff), asize - roff); | |
400 | if (err < 0) | |
401 | goto out; | |
402 | err = 0; | |
403 | goto next_attr; | |
404 | ||
405 | end_enum: | |
406 | ||
407 | if (!std5) | |
408 | goto out; | |
409 | ||
410 | if (!is_match && name) { | |
e8b8e97f | 411 | /* Reuse rec as buffer for ascii name. */ |
82cae269 KK |
412 | err = -ENOENT; |
413 | goto out; | |
414 | } | |
415 | ||
416 | if (std5->fa & FILE_ATTRIBUTE_READONLY) | |
417 | mode &= ~0222; | |
418 | ||
419 | if (!names) { | |
420 | err = -EINVAL; | |
421 | goto out; | |
422 | } | |
423 | ||
78ab59fe KK |
424 | if (names != le16_to_cpu(rec->hard_links)) { |
425 | /* Correct minor error on the fly. Do not mark inode as dirty. */ | |
426 | rec->hard_links = cpu_to_le16(names); | |
427 | ni->mi.dirty = true; | |
428 | } | |
429 | ||
82cae269 KK |
430 | set_nlink(inode, names); |
431 | ||
432 | if (S_ISDIR(mode)) { | |
433 | ni->std_fa |= FILE_ATTRIBUTE_DIRECTORY; | |
434 | ||
435 | /* | |
e8b8e97f | 436 | * Dot and dot-dot should be included in count but was not |
82cae269 | 437 | * included in enumeration. |
e8b8e97f | 438 | * Usually a hard links to directories are disabled. |
82cae269 KK |
439 | */ |
440 | inode->i_op = &ntfs_dir_inode_operations; | |
441 | inode->i_fop = &ntfs_dir_operations; | |
442 | ni->i_valid = 0; | |
443 | } else if (S_ISLNK(mode)) { | |
444 | ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY; | |
445 | inode->i_op = &ntfs_link_inode_operations; | |
446 | inode->i_fop = NULL; | |
22b05f1a | 447 | inode_nohighmem(inode); |
82cae269 KK |
448 | } else if (S_ISREG(mode)) { |
449 | ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY; | |
450 | inode->i_op = &ntfs_file_inode_operations; | |
451 | inode->i_fop = &ntfs_file_operations; | |
96de65a9 | 452 | inode->i_mapping->a_ops = is_compressed(ni) ? &ntfs_aops_cmpr : |
f0377761 | 453 | &ntfs_aops; |
82cae269 KK |
454 | if (ino != MFT_REC_MFT) |
455 | init_rwsem(&ni->file.run_lock); | |
456 | } else if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISFIFO(mode) || | |
457 | S_ISSOCK(mode)) { | |
458 | inode->i_op = &ntfs_special_inode_operations; | |
459 | init_special_inode(inode, mode, inode->i_rdev); | |
460 | } else if (fname && fname->home.low == cpu_to_le32(MFT_REC_EXTEND) && | |
461 | fname->home.seq == cpu_to_le16(MFT_REC_EXTEND)) { | |
e8b8e97f | 462 | /* Records in $Extend are not a files or general directories. */ |
37a530bf | 463 | inode->i_op = &ntfs_file_inode_operations; |
82cae269 KK |
464 | } else { |
465 | err = -EINVAL; | |
466 | goto out; | |
467 | } | |
468 | ||
564c97bd | 469 | if ((sbi->options->sys_immutable && |
82cae269 KK |
470 | (std5->fa & FILE_ATTRIBUTE_SYSTEM)) && |
471 | !S_ISFIFO(mode) && !S_ISSOCK(mode) && !S_ISLNK(mode)) { | |
472 | inode->i_flags |= S_IMMUTABLE; | |
473 | } else { | |
474 | inode->i_flags &= ~S_IMMUTABLE; | |
475 | } | |
476 | ||
477 | inode->i_mode = mode; | |
478 | if (!(ni->ni_flags & NI_FLAG_EA)) { | |
e8b8e97f | 479 | /* If no xattr then no security (stored in xattr). */ |
82cae269 KK |
480 | inode->i_flags |= S_NOSEC; |
481 | } | |
482 | ||
82cae269 KK |
483 | if (ino == MFT_REC_MFT && !sb->s_root) |
484 | sbi->mft.ni = NULL; | |
485 | ||
486 | unlock_new_inode(inode); | |
487 | ||
488 | return inode; | |
489 | ||
490 | out: | |
491 | if (ino == MFT_REC_MFT && !sb->s_root) | |
492 | sbi->mft.ni = NULL; | |
493 | ||
494 | iget_failed(inode); | |
495 | return ERR_PTR(err); | |
496 | } | |
497 | ||
e8b8e97f KA |
498 | /* |
499 | * ntfs_test_inode | |
500 | * | |
501 | * Return: 1 if match. | |
502 | */ | |
82cae269 KK |
503 | static int ntfs_test_inode(struct inode *inode, void *data) |
504 | { | |
505 | struct MFT_REF *ref = data; | |
506 | ||
507 | return ino_get(ref) == inode->i_ino; | |
508 | } | |
509 | ||
510 | static int ntfs_set_inode(struct inode *inode, void *data) | |
511 | { | |
512 | const struct MFT_REF *ref = data; | |
513 | ||
514 | inode->i_ino = ino_get(ref); | |
515 | return 0; | |
516 | } | |
517 | ||
518 | struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref, | |
519 | const struct cpu_str *name) | |
520 | { | |
521 | struct inode *inode; | |
522 | ||
523 | inode = iget5_locked(sb, ino_get(ref), ntfs_test_inode, ntfs_set_inode, | |
524 | (void *)ref); | |
525 | if (unlikely(!inode)) | |
526 | return ERR_PTR(-ENOMEM); | |
527 | ||
528 | /* If this is a freshly allocated inode, need to read it now. */ | |
529 | if (inode->i_state & I_NEW) | |
530 | inode = ntfs_read_mft(inode, name, ref); | |
531 | else if (ref->seq != ntfs_i(inode)->mi.mrec->seq) { | |
e8b8e97f | 532 | /* Inode overlaps? */ |
c12df45e | 533 | _ntfs_bad_inode(inode); |
82cae269 KK |
534 | } |
535 | ||
0e8235d2 KK |
536 | if (IS_ERR(inode) && name) |
537 | ntfs_set_state(sb->s_fs_info, NTFS_DIRTY_ERROR); | |
538 | ||
82cae269 KK |
539 | return inode; |
540 | } | |
541 | ||
542 | enum get_block_ctx { | |
543 | GET_BLOCK_GENERAL = 0, | |
544 | GET_BLOCK_WRITE_BEGIN = 1, | |
545 | GET_BLOCK_DIRECT_IO_R = 2, | |
546 | GET_BLOCK_DIRECT_IO_W = 3, | |
547 | GET_BLOCK_BMAP = 4, | |
548 | }; | |
549 | ||
550 | static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo, | |
551 | struct buffer_head *bh, int create, | |
552 | enum get_block_ctx ctx) | |
553 | { | |
554 | struct super_block *sb = inode->i_sb; | |
555 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
556 | struct ntfs_inode *ni = ntfs_i(inode); | |
557 | struct page *page = bh->b_page; | |
558 | u8 cluster_bits = sbi->cluster_bits; | |
559 | u32 block_size = sb->s_blocksize; | |
560 | u64 bytes, lbo, valid; | |
561 | u32 off; | |
562 | int err; | |
563 | CLST vcn, lcn, len; | |
564 | bool new; | |
565 | ||
e8b8e97f | 566 | /* Clear previous state. */ |
82cae269 KK |
567 | clear_buffer_new(bh); |
568 | clear_buffer_uptodate(bh); | |
569 | ||
82cae269 KK |
570 | if (is_resident(ni)) { |
571 | ni_lock(ni); | |
572 | err = attr_data_read_resident(ni, page); | |
573 | ni_unlock(ni); | |
574 | ||
575 | if (!err) | |
576 | set_buffer_uptodate(bh); | |
577 | bh->b_size = block_size; | |
578 | return err; | |
579 | } | |
580 | ||
581 | vcn = vbo >> cluster_bits; | |
582 | off = vbo & sbi->cluster_mask; | |
583 | new = false; | |
584 | ||
c380b52f KK |
585 | err = attr_data_get_block(ni, vcn, 1, &lcn, &len, create ? &new : NULL, |
586 | create && sbi->cluster_size > PAGE_SIZE); | |
82cae269 KK |
587 | if (err) |
588 | goto out; | |
589 | ||
590 | if (!len) | |
591 | return 0; | |
592 | ||
593 | bytes = ((u64)len << cluster_bits) - off; | |
594 | ||
595 | if (lcn == SPARSE_LCN) { | |
596 | if (!create) { | |
597 | if (bh->b_size > bytes) | |
598 | bh->b_size = bytes; | |
599 | return 0; | |
600 | } | |
601 | WARN_ON(1); | |
602 | } | |
603 | ||
c380b52f | 604 | if (new) |
82cae269 | 605 | set_buffer_new(bh); |
82cae269 KK |
606 | |
607 | lbo = ((u64)lcn << cluster_bits) + off; | |
608 | ||
609 | set_buffer_mapped(bh); | |
610 | bh->b_bdev = sb->s_bdev; | |
611 | bh->b_blocknr = lbo >> sb->s_blocksize_bits; | |
612 | ||
613 | valid = ni->i_valid; | |
614 | ||
615 | if (ctx == GET_BLOCK_DIRECT_IO_W) { | |
e8b8e97f | 616 | /* ntfs_direct_IO will update ni->i_valid. */ |
82cae269 KK |
617 | if (vbo >= valid) |
618 | set_buffer_new(bh); | |
619 | } else if (create) { | |
d3624466 | 620 | /* Normal write. */ |
82cae269 KK |
621 | if (bytes > bh->b_size) |
622 | bytes = bh->b_size; | |
623 | ||
624 | if (vbo >= valid) | |
625 | set_buffer_new(bh); | |
626 | ||
627 | if (vbo + bytes > valid) { | |
628 | ni->i_valid = vbo + bytes; | |
629 | mark_inode_dirty(inode); | |
630 | } | |
631 | } else if (vbo >= valid) { | |
e8b8e97f | 632 | /* Read out of valid data. */ |
82cae269 KK |
633 | clear_buffer_mapped(bh); |
634 | } else if (vbo + bytes <= valid) { | |
e8b8e97f | 635 | /* Normal read. */ |
82cae269 | 636 | } else if (vbo + block_size <= valid) { |
e8b8e97f | 637 | /* Normal short read. */ |
82cae269 KK |
638 | bytes = block_size; |
639 | } else { | |
640 | /* | |
e8b8e97f | 641 | * Read across valid size: vbo < valid && valid < vbo + block_size |
82cae269 KK |
642 | */ |
643 | bytes = block_size; | |
644 | ||
645 | if (page) { | |
646 | u32 voff = valid - vbo; | |
647 | ||
648 | bh->b_size = block_size; | |
649 | off = vbo & (PAGE_SIZE - 1); | |
650 | set_bh_page(bh, page, off); | |
c20bc9c6 | 651 | |
6bf414a0 ZY |
652 | err = bh_read(bh, 0); |
653 | if (err < 0) | |
82cae269 | 654 | goto out; |
82cae269 KK |
655 | zero_user_segment(page, off + voff, off + block_size); |
656 | } | |
657 | } | |
658 | ||
659 | if (bh->b_size > bytes) | |
660 | bh->b_size = bytes; | |
661 | ||
662 | #ifndef __LP64__ | |
663 | if (ctx == GET_BLOCK_DIRECT_IO_W || ctx == GET_BLOCK_DIRECT_IO_R) { | |
664 | static_assert(sizeof(size_t) < sizeof(loff_t)); | |
665 | if (bytes > 0x40000000u) | |
666 | bh->b_size = 0x40000000u; | |
667 | } | |
668 | #endif | |
669 | ||
670 | return 0; | |
671 | ||
672 | out: | |
673 | return err; | |
674 | } | |
675 | ||
676 | int ntfs_get_block(struct inode *inode, sector_t vbn, | |
677 | struct buffer_head *bh_result, int create) | |
678 | { | |
679 | return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits, | |
680 | bh_result, create, GET_BLOCK_GENERAL); | |
681 | } | |
682 | ||
683 | static int ntfs_get_block_bmap(struct inode *inode, sector_t vsn, | |
684 | struct buffer_head *bh_result, int create) | |
685 | { | |
686 | return ntfs_get_block_vbo(inode, | |
687 | (u64)vsn << inode->i_sb->s_blocksize_bits, | |
688 | bh_result, create, GET_BLOCK_BMAP); | |
689 | } | |
690 | ||
691 | static sector_t ntfs_bmap(struct address_space *mapping, sector_t block) | |
692 | { | |
693 | return generic_block_bmap(mapping, block, ntfs_get_block_bmap); | |
694 | } | |
695 | ||
f132ab7d | 696 | static int ntfs_read_folio(struct file *file, struct folio *folio) |
82cae269 | 697 | { |
f132ab7d | 698 | struct page *page = &folio->page; |
82cae269 KK |
699 | int err; |
700 | struct address_space *mapping = page->mapping; | |
701 | struct inode *inode = mapping->host; | |
702 | struct ntfs_inode *ni = ntfs_i(inode); | |
703 | ||
704 | if (is_resident(ni)) { | |
705 | ni_lock(ni); | |
706 | err = attr_data_read_resident(ni, page); | |
707 | ni_unlock(ni); | |
708 | if (err != E_NTFS_NONRESIDENT) { | |
709 | unlock_page(page); | |
710 | return err; | |
711 | } | |
712 | } | |
713 | ||
714 | if (is_compressed(ni)) { | |
715 | ni_lock(ni); | |
716 | err = ni_readpage_cmpr(ni, page); | |
717 | ni_unlock(ni); | |
718 | return err; | |
719 | } | |
720 | ||
e8b8e97f | 721 | /* Normal + sparse files. */ |
f132ab7d | 722 | return mpage_read_folio(folio, ntfs_get_block); |
82cae269 KK |
723 | } |
724 | ||
725 | static void ntfs_readahead(struct readahead_control *rac) | |
726 | { | |
727 | struct address_space *mapping = rac->mapping; | |
728 | struct inode *inode = mapping->host; | |
729 | struct ntfs_inode *ni = ntfs_i(inode); | |
730 | u64 valid; | |
731 | loff_t pos; | |
732 | ||
733 | if (is_resident(ni)) { | |
e8b8e97f | 734 | /* No readahead for resident. */ |
82cae269 KK |
735 | return; |
736 | } | |
737 | ||
738 | if (is_compressed(ni)) { | |
e8b8e97f | 739 | /* No readahead for compressed. */ |
82cae269 KK |
740 | return; |
741 | } | |
742 | ||
743 | valid = ni->i_valid; | |
744 | pos = readahead_pos(rac); | |
745 | ||
746 | if (valid < i_size_read(inode) && pos <= valid && | |
747 | valid < pos + readahead_length(rac)) { | |
e8b8e97f | 748 | /* Range cross 'valid'. Read it page by page. */ |
82cae269 KK |
749 | return; |
750 | } | |
751 | ||
752 | mpage_readahead(rac, ntfs_get_block); | |
753 | } | |
754 | ||
755 | static int ntfs_get_block_direct_IO_R(struct inode *inode, sector_t iblock, | |
756 | struct buffer_head *bh_result, int create) | |
757 | { | |
758 | return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits, | |
759 | bh_result, create, GET_BLOCK_DIRECT_IO_R); | |
760 | } | |
761 | ||
762 | static int ntfs_get_block_direct_IO_W(struct inode *inode, sector_t iblock, | |
763 | struct buffer_head *bh_result, int create) | |
764 | { | |
765 | return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits, | |
766 | bh_result, create, GET_BLOCK_DIRECT_IO_W); | |
767 | } | |
768 | ||
769 | static ssize_t ntfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) | |
770 | { | |
771 | struct file *file = iocb->ki_filp; | |
772 | struct address_space *mapping = file->f_mapping; | |
773 | struct inode *inode = mapping->host; | |
774 | struct ntfs_inode *ni = ntfs_i(inode); | |
775 | loff_t vbo = iocb->ki_pos; | |
776 | loff_t end; | |
777 | int wr = iov_iter_rw(iter) & WRITE; | |
52e00ea6 | 778 | size_t iter_count = iov_iter_count(iter); |
82cae269 KK |
779 | loff_t valid; |
780 | ssize_t ret; | |
781 | ||
782 | if (is_resident(ni)) { | |
e8b8e97f | 783 | /* Switch to buffered write. */ |
82cae269 KK |
784 | ret = 0; |
785 | goto out; | |
786 | } | |
787 | ||
788 | ret = blockdev_direct_IO(iocb, inode, iter, | |
96de65a9 | 789 | wr ? ntfs_get_block_direct_IO_W : |
f0377761 | 790 | ntfs_get_block_direct_IO_R); |
82cae269 | 791 | |
52e00ea6 KK |
792 | if (ret > 0) |
793 | end = vbo + ret; | |
794 | else if (wr && ret == -EIOCBQUEUED) | |
795 | end = vbo + iter_count; | |
796 | else | |
82cae269 KK |
797 | goto out; |
798 | ||
82cae269 KK |
799 | valid = ni->i_valid; |
800 | if (wr) { | |
801 | if (end > valid && !S_ISBLK(inode->i_mode)) { | |
802 | ni->i_valid = end; | |
803 | mark_inode_dirty(inode); | |
804 | } | |
805 | } else if (vbo < valid && valid < end) { | |
e8b8e97f | 806 | /* Fix page. */ |
82cae269 KK |
807 | iov_iter_revert(iter, end - valid); |
808 | iov_iter_zero(end - valid, iter); | |
809 | } | |
810 | ||
811 | out: | |
812 | return ret; | |
813 | } | |
814 | ||
815 | int ntfs_set_size(struct inode *inode, u64 new_size) | |
816 | { | |
817 | struct super_block *sb = inode->i_sb; | |
818 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
819 | struct ntfs_inode *ni = ntfs_i(inode); | |
820 | int err; | |
821 | ||
e8b8e97f | 822 | /* Check for maximum file size. */ |
82cae269 KK |
823 | if (is_sparsed(ni) || is_compressed(ni)) { |
824 | if (new_size > sbi->maxbytes_sparse) { | |
825 | err = -EFBIG; | |
826 | goto out; | |
827 | } | |
828 | } else if (new_size > sbi->maxbytes) { | |
829 | err = -EFBIG; | |
830 | goto out; | |
831 | } | |
832 | ||
833 | ni_lock(ni); | |
834 | down_write(&ni->file.run_lock); | |
835 | ||
836 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size, | |
837 | &ni->i_valid, true, NULL); | |
838 | ||
839 | up_write(&ni->file.run_lock); | |
840 | ni_unlock(ni); | |
841 | ||
842 | mark_inode_dirty(inode); | |
843 | ||
844 | out: | |
845 | return err; | |
846 | } | |
847 | ||
d585bdbe | 848 | static int ntfs_resident_writepage(struct folio *folio, |
96de65a9 | 849 | struct writeback_control *wbc, void *data) |
82cae269 | 850 | { |
d4428bad CH |
851 | struct address_space *mapping = data; |
852 | struct ntfs_inode *ni = ntfs_i(mapping->host); | |
853 | int ret; | |
82cae269 | 854 | |
d4428bad | 855 | ni_lock(ni); |
d585bdbe | 856 | ret = attr_data_write_resident(ni, &folio->page); |
d4428bad | 857 | ni_unlock(ni); |
82cae269 | 858 | |
d4428bad | 859 | if (ret != E_NTFS_NONRESIDENT) |
d585bdbe | 860 | folio_unlock(folio); |
d4428bad CH |
861 | mapping_set_error(mapping, ret); |
862 | return ret; | |
82cae269 KK |
863 | } |
864 | ||
865 | static int ntfs_writepages(struct address_space *mapping, | |
866 | struct writeback_control *wbc) | |
867 | { | |
91397101 | 868 | if (is_resident(ntfs_i(mapping->host))) |
d4428bad CH |
869 | return write_cache_pages(mapping, wbc, ntfs_resident_writepage, |
870 | mapping); | |
91397101 | 871 | return mpage_writepages(mapping, wbc, ntfs_get_block); |
82cae269 KK |
872 | } |
873 | ||
874 | static int ntfs_get_block_write_begin(struct inode *inode, sector_t vbn, | |
875 | struct buffer_head *bh_result, int create) | |
876 | { | |
877 | return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits, | |
878 | bh_result, create, GET_BLOCK_WRITE_BEGIN); | |
879 | } | |
880 | ||
44ab23b9 MWO |
881 | int ntfs_write_begin(struct file *file, struct address_space *mapping, |
882 | loff_t pos, u32 len, struct page **pagep, void **fsdata) | |
82cae269 KK |
883 | { |
884 | int err; | |
885 | struct inode *inode = mapping->host; | |
886 | struct ntfs_inode *ni = ntfs_i(inode); | |
887 | ||
888 | *pagep = NULL; | |
889 | if (is_resident(ni)) { | |
96de65a9 KK |
890 | struct page *page = |
891 | grab_cache_page_write_begin(mapping, pos >> PAGE_SHIFT); | |
82cae269 KK |
892 | |
893 | if (!page) { | |
894 | err = -ENOMEM; | |
895 | goto out; | |
896 | } | |
897 | ||
898 | ni_lock(ni); | |
899 | err = attr_data_read_resident(ni, page); | |
900 | ni_unlock(ni); | |
901 | ||
902 | if (!err) { | |
903 | *pagep = page; | |
904 | goto out; | |
905 | } | |
906 | unlock_page(page); | |
907 | put_page(page); | |
908 | ||
909 | if (err != E_NTFS_NONRESIDENT) | |
910 | goto out; | |
911 | } | |
912 | ||
b3992d1e | 913 | err = block_write_begin(mapping, pos, len, pagep, |
82cae269 KK |
914 | ntfs_get_block_write_begin); |
915 | ||
916 | out: | |
917 | return err; | |
918 | } | |
919 | ||
e8b8e97f KA |
920 | /* |
921 | * ntfs_write_end - Address_space_operations::write_end. | |
922 | */ | |
96de65a9 KK |
923 | int ntfs_write_end(struct file *file, struct address_space *mapping, loff_t pos, |
924 | u32 len, u32 copied, struct page *page, void *fsdata) | |
82cae269 KK |
925 | { |
926 | struct inode *inode = mapping->host; | |
927 | struct ntfs_inode *ni = ntfs_i(inode); | |
928 | u64 valid = ni->i_valid; | |
929 | bool dirty = false; | |
930 | int err; | |
931 | ||
932 | if (is_resident(ni)) { | |
933 | ni_lock(ni); | |
934 | err = attr_data_write_resident(ni, page); | |
935 | ni_unlock(ni); | |
936 | if (!err) { | |
937 | dirty = true; | |
e8b8e97f | 938 | /* Clear any buffers in page. */ |
82cae269 KK |
939 | if (page_has_buffers(page)) { |
940 | struct buffer_head *head, *bh; | |
941 | ||
942 | bh = head = page_buffers(page); | |
943 | do { | |
944 | clear_buffer_dirty(bh); | |
945 | clear_buffer_mapped(bh); | |
946 | set_buffer_uptodate(bh); | |
947 | } while (head != (bh = bh->b_this_page)); | |
948 | } | |
949 | SetPageUptodate(page); | |
950 | err = copied; | |
951 | } | |
952 | unlock_page(page); | |
953 | put_page(page); | |
954 | } else { | |
955 | err = generic_write_end(file, mapping, pos, len, copied, page, | |
956 | fsdata); | |
957 | } | |
958 | ||
959 | if (err >= 0) { | |
960 | if (!(ni->std_fa & FILE_ATTRIBUTE_ARCHIVE)) { | |
961 | inode->i_ctime = inode->i_mtime = current_time(inode); | |
962 | ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE; | |
963 | dirty = true; | |
964 | } | |
965 | ||
966 | if (valid != ni->i_valid) { | |
e8b8e97f | 967 | /* ni->i_valid is changed in ntfs_get_block_vbo. */ |
82cae269 KK |
968 | dirty = true; |
969 | } | |
970 | ||
ad26a9c8 KK |
971 | if (pos + err > inode->i_size) { |
972 | inode->i_size = pos + err; | |
973 | dirty = true; | |
974 | } | |
975 | ||
82cae269 KK |
976 | if (dirty) |
977 | mark_inode_dirty(inode); | |
978 | } | |
979 | ||
980 | return err; | |
981 | } | |
982 | ||
983 | int reset_log_file(struct inode *inode) | |
984 | { | |
985 | int err; | |
986 | loff_t pos = 0; | |
987 | u32 log_size = inode->i_size; | |
988 | struct address_space *mapping = inode->i_mapping; | |
989 | ||
990 | for (;;) { | |
991 | u32 len; | |
992 | void *kaddr; | |
993 | struct page *page; | |
994 | ||
995 | len = pos + PAGE_SIZE > log_size ? (log_size - pos) : PAGE_SIZE; | |
996 | ||
b3992d1e | 997 | err = block_write_begin(mapping, pos, len, &page, |
82cae269 KK |
998 | ntfs_get_block_write_begin); |
999 | if (err) | |
1000 | goto out; | |
1001 | ||
1002 | kaddr = kmap_atomic(page); | |
1003 | memset(kaddr, -1, len); | |
1004 | kunmap_atomic(kaddr); | |
1005 | flush_dcache_page(page); | |
1006 | ||
1007 | err = block_write_end(NULL, mapping, pos, len, len, page, NULL); | |
1008 | if (err < 0) | |
1009 | goto out; | |
1010 | pos += len; | |
1011 | ||
1012 | if (pos >= log_size) | |
1013 | break; | |
1014 | balance_dirty_pages_ratelimited(mapping); | |
1015 | } | |
1016 | out: | |
1017 | mark_inode_dirty_sync(inode); | |
1018 | ||
1019 | return err; | |
1020 | } | |
1021 | ||
1022 | int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc) | |
1023 | { | |
1024 | return _ni_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL); | |
1025 | } | |
1026 | ||
1027 | int ntfs_sync_inode(struct inode *inode) | |
1028 | { | |
1029 | return _ni_write_inode(inode, 1); | |
1030 | } | |
1031 | ||
1032 | /* | |
e8b8e97f KA |
1033 | * writeback_inode - Helper function for ntfs_flush_inodes(). |
1034 | * | |
1035 | * This writes both the inode and the file data blocks, waiting | |
1036 | * for in flight data blocks before the start of the call. It | |
1037 | * does not wait for any io started during the call. | |
82cae269 KK |
1038 | */ |
1039 | static int writeback_inode(struct inode *inode) | |
1040 | { | |
1041 | int ret = sync_inode_metadata(inode, 0); | |
1042 | ||
1043 | if (!ret) | |
1044 | ret = filemap_fdatawrite(inode->i_mapping); | |
1045 | return ret; | |
1046 | } | |
1047 | ||
1048 | /* | |
e8b8e97f KA |
1049 | * ntfs_flush_inodes |
1050 | * | |
1051 | * Write data and metadata corresponding to i1 and i2. The io is | |
82cae269 KK |
1052 | * started but we do not wait for any of it to finish. |
1053 | * | |
e8b8e97f | 1054 | * filemap_flush() is used for the block device, so if there is a dirty |
82cae269 | 1055 | * page for a block already in flight, we will not wait and start the |
e8b8e97f | 1056 | * io over again. |
82cae269 KK |
1057 | */ |
1058 | int ntfs_flush_inodes(struct super_block *sb, struct inode *i1, | |
1059 | struct inode *i2) | |
1060 | { | |
1061 | int ret = 0; | |
1062 | ||
1063 | if (i1) | |
1064 | ret = writeback_inode(i1); | |
1065 | if (!ret && i2) | |
1066 | ret = writeback_inode(i2); | |
1067 | if (!ret) | |
680e667b | 1068 | ret = sync_blockdev_nowait(sb->s_bdev); |
82cae269 KK |
1069 | return ret; |
1070 | } | |
1071 | ||
1072 | int inode_write_data(struct inode *inode, const void *data, size_t bytes) | |
1073 | { | |
1074 | pgoff_t idx; | |
1075 | ||
e8b8e97f | 1076 | /* Write non resident data. */ |
82cae269 KK |
1077 | for (idx = 0; bytes; idx++) { |
1078 | size_t op = bytes > PAGE_SIZE ? PAGE_SIZE : bytes; | |
1079 | struct page *page = ntfs_map_page(inode->i_mapping, idx); | |
1080 | ||
1081 | if (IS_ERR(page)) | |
1082 | return PTR_ERR(page); | |
1083 | ||
1084 | lock_page(page); | |
1085 | WARN_ON(!PageUptodate(page)); | |
1086 | ClearPageUptodate(page); | |
1087 | ||
1088 | memcpy(page_address(page), data, op); | |
1089 | ||
1090 | flush_dcache_page(page); | |
1091 | SetPageUptodate(page); | |
1092 | unlock_page(page); | |
1093 | ||
1094 | ntfs_unmap_page(page); | |
1095 | ||
1096 | bytes -= op; | |
1097 | data = Add2Ptr(data, PAGE_SIZE); | |
1098 | } | |
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | /* | |
e8b8e97f KA |
1103 | * ntfs_reparse_bytes |
1104 | * | |
d3624466 | 1105 | * Number of bytes for REPARSE_DATA_BUFFER(IO_REPARSE_TAG_SYMLINK) |
e8b8e97f | 1106 | * for unicode string of @uni_len length. |
82cae269 KK |
1107 | */ |
1108 | static inline u32 ntfs_reparse_bytes(u32 uni_len) | |
1109 | { | |
e8b8e97f | 1110 | /* Header + unicode string + decorated unicode string. */ |
82cae269 KK |
1111 | return sizeof(short) * (2 * uni_len + 4) + |
1112 | offsetof(struct REPARSE_DATA_BUFFER, | |
1113 | SymbolicLinkReparseBuffer.PathBuffer); | |
1114 | } | |
1115 | ||
1116 | static struct REPARSE_DATA_BUFFER * | |
1117 | ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname, | |
1118 | u32 size, u16 *nsize) | |
1119 | { | |
1120 | int i, err; | |
1121 | struct REPARSE_DATA_BUFFER *rp; | |
1122 | __le16 *rp_name; | |
1123 | typeof(rp->SymbolicLinkReparseBuffer) *rs; | |
1124 | ||
195c52bd | 1125 | rp = kzalloc(ntfs_reparse_bytes(2 * size + 2), GFP_NOFS); |
82cae269 KK |
1126 | if (!rp) |
1127 | return ERR_PTR(-ENOMEM); | |
1128 | ||
1129 | rs = &rp->SymbolicLinkReparseBuffer; | |
1130 | rp_name = rs->PathBuffer; | |
1131 | ||
e8b8e97f | 1132 | /* Convert link name to UTF-16. */ |
82cae269 KK |
1133 | err = ntfs_nls_to_utf16(sbi, symname, size, |
1134 | (struct cpu_str *)(rp_name - 1), 2 * size, | |
1135 | UTF16_LITTLE_ENDIAN); | |
1136 | if (err < 0) | |
1137 | goto out; | |
1138 | ||
e8b8e97f | 1139 | /* err = the length of unicode name of symlink. */ |
82cae269 KK |
1140 | *nsize = ntfs_reparse_bytes(err); |
1141 | ||
1142 | if (*nsize > sbi->reparse.max_size) { | |
1143 | err = -EFBIG; | |
1144 | goto out; | |
1145 | } | |
1146 | ||
e8b8e97f | 1147 | /* Translate Linux '/' into Windows '\'. */ |
82cae269 KK |
1148 | for (i = 0; i < err; i++) { |
1149 | if (rp_name[i] == cpu_to_le16('/')) | |
1150 | rp_name[i] = cpu_to_le16('\\'); | |
1151 | } | |
1152 | ||
1153 | rp->ReparseTag = IO_REPARSE_TAG_SYMLINK; | |
1154 | rp->ReparseDataLength = | |
1155 | cpu_to_le16(*nsize - offsetof(struct REPARSE_DATA_BUFFER, | |
1156 | SymbolicLinkReparseBuffer)); | |
1157 | ||
e8b8e97f | 1158 | /* PrintName + SubstituteName. */ |
82cae269 KK |
1159 | rs->SubstituteNameOffset = cpu_to_le16(sizeof(short) * err); |
1160 | rs->SubstituteNameLength = cpu_to_le16(sizeof(short) * err + 8); | |
1161 | rs->PrintNameLength = rs->SubstituteNameOffset; | |
1162 | ||
1163 | /* | |
e8b8e97f KA |
1164 | * TODO: Use relative path if possible to allow Windows to |
1165 | * parse this path. | |
1166 | * 0-absolute path 1- relative path (SYMLINK_FLAG_RELATIVE). | |
82cae269 KK |
1167 | */ |
1168 | rs->Flags = 0; | |
1169 | ||
1170 | memmove(rp_name + err + 4, rp_name, sizeof(short) * err); | |
1171 | ||
e8b8e97f | 1172 | /* Decorate SubstituteName. */ |
82cae269 KK |
1173 | rp_name += err; |
1174 | rp_name[0] = cpu_to_le16('\\'); | |
1175 | rp_name[1] = cpu_to_le16('?'); | |
1176 | rp_name[2] = cpu_to_le16('?'); | |
1177 | rp_name[3] = cpu_to_le16('\\'); | |
1178 | ||
1179 | return rp; | |
1180 | out: | |
195c52bd | 1181 | kfree(rp); |
82cae269 KK |
1182 | return ERR_PTR(err); |
1183 | } | |
1184 | ||
2b108260 KK |
1185 | /* |
1186 | * ntfs_create_inode | |
1187 | * | |
1188 | * Helper function for: | |
1189 | * - ntfs_create | |
1190 | * - ntfs_mknod | |
1191 | * - ntfs_symlink | |
1192 | * - ntfs_mkdir | |
1193 | * - ntfs_atomic_open | |
f0377761 | 1194 | * |
2b108260 KK |
1195 | * NOTE: if fnd != NULL (ntfs_atomic_open) then @dir is locked |
1196 | */ | |
f0377761 KK |
1197 | struct inode *ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir, |
1198 | struct dentry *dentry, | |
82cae269 KK |
1199 | const struct cpu_str *uni, umode_t mode, |
1200 | dev_t dev, const char *symname, u32 size, | |
1201 | struct ntfs_fnd *fnd) | |
1202 | { | |
1203 | int err; | |
1204 | struct super_block *sb = dir->i_sb; | |
1205 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
1206 | const struct qstr *name = &dentry->d_name; | |
1207 | CLST ino = 0; | |
1208 | struct ntfs_inode *dir_ni = ntfs_i(dir); | |
1209 | struct ntfs_inode *ni = NULL; | |
1210 | struct inode *inode = NULL; | |
1211 | struct ATTRIB *attr; | |
1212 | struct ATTR_STD_INFO5 *std5; | |
1213 | struct ATTR_FILE_NAME *fname; | |
1214 | struct MFT_REC *rec; | |
1215 | u32 asize, dsize, sd_size; | |
1216 | enum FILE_ATTRIBUTE fa; | |
1217 | __le32 security_id = SECURITY_ID_INVALID; | |
1218 | CLST vcn; | |
1219 | const void *sd; | |
1220 | u16 t16, nsize = 0, aid = 0; | |
1221 | struct INDEX_ROOT *root, *dir_root; | |
1222 | struct NTFS_DE *e, *new_de = NULL; | |
1223 | struct REPARSE_DATA_BUFFER *rp = NULL; | |
1224 | bool rp_inserted = false; | |
1225 | ||
2b108260 KK |
1226 | if (!fnd) |
1227 | ni_lock_dir(dir_ni); | |
d562e901 | 1228 | |
82cae269 | 1229 | dir_root = indx_get_root(&dir_ni->dir, dir_ni, NULL, NULL); |
d562e901 KK |
1230 | if (!dir_root) { |
1231 | err = -EINVAL; | |
1232 | goto out1; | |
1233 | } | |
82cae269 KK |
1234 | |
1235 | if (S_ISDIR(mode)) { | |
d3624466 | 1236 | /* Use parent's directory attributes. */ |
82cae269 KK |
1237 | fa = dir_ni->std_fa | FILE_ATTRIBUTE_DIRECTORY | |
1238 | FILE_ATTRIBUTE_ARCHIVE; | |
1239 | /* | |
d3624466 KK |
1240 | * By default child directory inherits parent attributes. |
1241 | * Root directory is hidden + system. | |
1242 | * Make an exception for children in root. | |
82cae269 KK |
1243 | */ |
1244 | if (dir->i_ino == MFT_REC_ROOT) | |
1245 | fa &= ~(FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM); | |
1246 | } else if (S_ISLNK(mode)) { | |
1247 | /* It is good idea that link should be the same type (file/dir) as target */ | |
1248 | fa = FILE_ATTRIBUTE_REPARSE_POINT; | |
1249 | ||
1250 | /* | |
d3624466 KK |
1251 | * Linux: there are dir/file/symlink and so on. |
1252 | * NTFS: symlinks are "dir + reparse" or "file + reparse" | |
82cae269 KK |
1253 | * It is good idea to create: |
1254 | * dir + reparse if 'symname' points to directory | |
1255 | * or | |
1256 | * file + reparse if 'symname' points to file | |
e8b8e97f | 1257 | * Unfortunately kern_path hangs if symname contains 'dir'. |
82cae269 KK |
1258 | */ |
1259 | ||
1260 | /* | |
1261 | * struct path path; | |
1262 | * | |
1263 | * if (!kern_path(symname, LOOKUP_FOLLOW, &path)){ | |
1264 | * struct inode *target = d_inode(path.dentry); | |
1265 | * | |
1266 | * if (S_ISDIR(target->i_mode)) | |
1267 | * fa |= FILE_ATTRIBUTE_DIRECTORY; | |
1268 | * // if ( target->i_sb == sb ){ | |
1269 | * // use relative path? | |
1270 | * // } | |
1271 | * path_put(&path); | |
1272 | * } | |
1273 | */ | |
1274 | } else if (S_ISREG(mode)) { | |
564c97bd | 1275 | if (sbi->options->sparse) { |
e8b8e97f | 1276 | /* Sparsed regular file, cause option 'sparse'. */ |
82cae269 KK |
1277 | fa = FILE_ATTRIBUTE_SPARSE_FILE | |
1278 | FILE_ATTRIBUTE_ARCHIVE; | |
1279 | } else if (dir_ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) { | |
e8b8e97f | 1280 | /* Compressed regular file, if parent is compressed. */ |
82cae269 KK |
1281 | fa = FILE_ATTRIBUTE_COMPRESSED | FILE_ATTRIBUTE_ARCHIVE; |
1282 | } else { | |
e8b8e97f | 1283 | /* Regular file, default attributes. */ |
82cae269 KK |
1284 | fa = FILE_ATTRIBUTE_ARCHIVE; |
1285 | } | |
1286 | } else { | |
1287 | fa = FILE_ATTRIBUTE_ARCHIVE; | |
1288 | } | |
1289 | ||
dc0fcc99 | 1290 | /* If option "hide_dot_files" then set hidden attribute for dot files. */ |
098250db KK |
1291 | if (sbi->options->hide_dot_files && name->name[0] == '.') |
1292 | fa |= FILE_ATTRIBUTE_HIDDEN; | |
1293 | ||
82cae269 KK |
1294 | if (!(mode & 0222)) |
1295 | fa |= FILE_ATTRIBUTE_READONLY; | |
1296 | ||
e8b8e97f | 1297 | /* Allocate PATH_MAX bytes. */ |
82cae269 KK |
1298 | new_de = __getname(); |
1299 | if (!new_de) { | |
1300 | err = -ENOMEM; | |
1301 | goto out1; | |
1302 | } | |
1303 | ||
e8b8e97f | 1304 | /* Mark rw ntfs as dirty. it will be cleared at umount. */ |
82cae269 KK |
1305 | ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); |
1306 | ||
e8b8e97f | 1307 | /* Step 1: allocate and fill new mft record. */ |
82cae269 KK |
1308 | err = ntfs_look_free_mft(sbi, &ino, false, NULL, NULL); |
1309 | if (err) | |
1310 | goto out2; | |
1311 | ||
a81f47c4 | 1312 | ni = ntfs_new_inode(sbi, ino, S_ISDIR(mode) ? RECORD_FLAG_DIR : 0); |
82cae269 KK |
1313 | if (IS_ERR(ni)) { |
1314 | err = PTR_ERR(ni); | |
1315 | ni = NULL; | |
1316 | goto out3; | |
1317 | } | |
1318 | inode = &ni->vfs_inode; | |
f2d40141 | 1319 | inode_init_owner(idmap, inode, dir, mode); |
78ab59fe | 1320 | mode = inode->i_mode; |
82cae269 | 1321 | |
1842fbc8 | 1322 | ni->i_crtime = current_time(inode); |
82cae269 KK |
1323 | |
1324 | rec = ni->mi.mrec; | |
1325 | rec->hard_links = cpu_to_le16(1); | |
1326 | attr = Add2Ptr(rec, le16_to_cpu(rec->attr_off)); | |
1327 | ||
e8b8e97f | 1328 | /* Get default security id. */ |
82cae269 KK |
1329 | sd = s_default_security; |
1330 | sd_size = sizeof(s_default_security); | |
1331 | ||
1332 | if (is_ntfs3(sbi)) { | |
1333 | security_id = dir_ni->std_security_id; | |
1334 | if (le32_to_cpu(security_id) < SECURITY_ID_FIRST) { | |
1335 | security_id = sbi->security.def_security_id; | |
1336 | ||
1337 | if (security_id == SECURITY_ID_INVALID && | |
1338 | !ntfs_insert_security(sbi, sd, sd_size, | |
1339 | &security_id, NULL)) | |
1340 | sbi->security.def_security_id = security_id; | |
1341 | } | |
1342 | } | |
1343 | ||
e8b8e97f | 1344 | /* Insert standard info. */ |
82cae269 KK |
1345 | std5 = Add2Ptr(attr, SIZEOF_RESIDENT); |
1346 | ||
1347 | if (security_id == SECURITY_ID_INVALID) { | |
1348 | dsize = sizeof(struct ATTR_STD_INFO); | |
1349 | } else { | |
1350 | dsize = sizeof(struct ATTR_STD_INFO5); | |
1351 | std5->security_id = security_id; | |
1352 | ni->std_security_id = security_id; | |
1353 | } | |
1354 | asize = SIZEOF_RESIDENT + dsize; | |
1355 | ||
1356 | attr->type = ATTR_STD; | |
1357 | attr->size = cpu_to_le32(asize); | |
1358 | attr->id = cpu_to_le16(aid++); | |
1359 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1360 | attr->res.data_size = cpu_to_le32(dsize); | |
1361 | ||
1362 | std5->cr_time = std5->m_time = std5->c_time = std5->a_time = | |
1842fbc8 | 1363 | kernel2nt(&ni->i_crtime); |
82cae269 | 1364 | |
1842fbc8 | 1365 | std5->fa = ni->std_fa = fa; |
82cae269 KK |
1366 | |
1367 | attr = Add2Ptr(attr, asize); | |
1368 | ||
e8b8e97f | 1369 | /* Insert file name. */ |
82cae269 KK |
1370 | err = fill_name_de(sbi, new_de, name, uni); |
1371 | if (err) | |
1372 | goto out4; | |
1373 | ||
1374 | mi_get_ref(&ni->mi, &new_de->ref); | |
1375 | ||
1376 | fname = (struct ATTR_FILE_NAME *)(new_de + 1); | |
1d07a9df DP |
1377 | |
1378 | if (sbi->options->windows_names && | |
1379 | !valid_windows_name(sbi, (struct le_str *)&fname->name_len)) { | |
1380 | err = -EINVAL; | |
1381 | goto out4; | |
1382 | } | |
1383 | ||
82cae269 KK |
1384 | mi_get_ref(&dir_ni->mi, &fname->home); |
1385 | fname->dup.cr_time = fname->dup.m_time = fname->dup.c_time = | |
1386 | fname->dup.a_time = std5->cr_time; | |
1387 | fname->dup.alloc_size = fname->dup.data_size = 0; | |
1388 | fname->dup.fa = std5->fa; | |
1389 | fname->dup.ea_size = fname->dup.reparse = 0; | |
1390 | ||
1391 | dsize = le16_to_cpu(new_de->key_size); | |
fa3cacf5 | 1392 | asize = ALIGN(SIZEOF_RESIDENT + dsize, 8); |
82cae269 KK |
1393 | |
1394 | attr->type = ATTR_NAME; | |
1395 | attr->size = cpu_to_le32(asize); | |
1396 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1397 | attr->res.flags = RESIDENT_FLAG_INDEXED; | |
1398 | attr->id = cpu_to_le16(aid++); | |
1399 | attr->res.data_size = cpu_to_le32(dsize); | |
1400 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), fname, dsize); | |
1401 | ||
1402 | attr = Add2Ptr(attr, asize); | |
1403 | ||
1404 | if (security_id == SECURITY_ID_INVALID) { | |
e8b8e97f | 1405 | /* Insert security attribute. */ |
fa3cacf5 | 1406 | asize = SIZEOF_RESIDENT + ALIGN(sd_size, 8); |
82cae269 KK |
1407 | |
1408 | attr->type = ATTR_SECURE; | |
1409 | attr->size = cpu_to_le32(asize); | |
1410 | attr->id = cpu_to_le16(aid++); | |
1411 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1412 | attr->res.data_size = cpu_to_le32(sd_size); | |
1413 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), sd, sd_size); | |
1414 | ||
1415 | attr = Add2Ptr(attr, asize); | |
1416 | } | |
1417 | ||
78ab59fe | 1418 | attr->id = cpu_to_le16(aid++); |
82cae269 KK |
1419 | if (fa & FILE_ATTRIBUTE_DIRECTORY) { |
1420 | /* | |
e8b8e97f KA |
1421 | * Regular directory or symlink to directory. |
1422 | * Create root attribute. | |
82cae269 KK |
1423 | */ |
1424 | dsize = sizeof(struct INDEX_ROOT) + sizeof(struct NTFS_DE); | |
1425 | asize = sizeof(I30_NAME) + SIZEOF_RESIDENT + dsize; | |
1426 | ||
1427 | attr->type = ATTR_ROOT; | |
1428 | attr->size = cpu_to_le32(asize); | |
82cae269 KK |
1429 | |
1430 | attr->name_len = ARRAY_SIZE(I30_NAME); | |
1431 | attr->name_off = SIZEOF_RESIDENT_LE; | |
1432 | attr->res.data_off = | |
1433 | cpu_to_le16(sizeof(I30_NAME) + SIZEOF_RESIDENT); | |
1434 | attr->res.data_size = cpu_to_le32(dsize); | |
1435 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), I30_NAME, | |
1436 | sizeof(I30_NAME)); | |
1437 | ||
1438 | root = Add2Ptr(attr, sizeof(I30_NAME) + SIZEOF_RESIDENT); | |
1439 | memcpy(root, dir_root, offsetof(struct INDEX_ROOT, ihdr)); | |
a81f47c4 | 1440 | root->ihdr.de_off = cpu_to_le32(sizeof(struct INDEX_HDR)); |
82cae269 KK |
1441 | root->ihdr.used = cpu_to_le32(sizeof(struct INDEX_HDR) + |
1442 | sizeof(struct NTFS_DE)); | |
1443 | root->ihdr.total = root->ihdr.used; | |
1444 | ||
1445 | e = Add2Ptr(root, sizeof(struct INDEX_ROOT)); | |
1446 | e->size = cpu_to_le16(sizeof(struct NTFS_DE)); | |
1447 | e->flags = NTFS_IE_LAST; | |
1448 | } else if (S_ISLNK(mode)) { | |
1449 | /* | |
e8b8e97f KA |
1450 | * Symlink to file. |
1451 | * Create empty resident data attribute. | |
82cae269 KK |
1452 | */ |
1453 | asize = SIZEOF_RESIDENT; | |
1454 | ||
e8b8e97f | 1455 | /* Insert empty ATTR_DATA */ |
82cae269 KK |
1456 | attr->type = ATTR_DATA; |
1457 | attr->size = cpu_to_le32(SIZEOF_RESIDENT); | |
82cae269 KK |
1458 | attr->name_off = SIZEOF_RESIDENT_LE; |
1459 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
78ab59fe | 1460 | } else if (S_ISREG(mode)) { |
82cae269 | 1461 | /* |
78ab59fe | 1462 | * Regular file. Create empty non resident data attribute. |
82cae269 KK |
1463 | */ |
1464 | attr->type = ATTR_DATA; | |
78ab59fe KK |
1465 | attr->non_res = 1; |
1466 | attr->nres.evcn = cpu_to_le64(-1ll); | |
1467 | if (fa & FILE_ATTRIBUTE_SPARSE_FILE) { | |
1468 | attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8); | |
1469 | attr->name_off = SIZEOF_NONRESIDENT_EX_LE; | |
1470 | attr->flags = ATTR_FLAG_SPARSED; | |
1471 | asize = SIZEOF_NONRESIDENT_EX + 8; | |
1472 | } else if (fa & FILE_ATTRIBUTE_COMPRESSED) { | |
1473 | attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8); | |
1474 | attr->name_off = SIZEOF_NONRESIDENT_EX_LE; | |
1475 | attr->flags = ATTR_FLAG_COMPRESSED; | |
1476 | attr->nres.c_unit = COMPRESSION_UNIT; | |
1477 | asize = SIZEOF_NONRESIDENT_EX + 8; | |
82cae269 | 1478 | } else { |
78ab59fe KK |
1479 | attr->size = cpu_to_le32(SIZEOF_NONRESIDENT + 8); |
1480 | attr->name_off = SIZEOF_NONRESIDENT_LE; | |
1481 | asize = SIZEOF_NONRESIDENT + 8; | |
82cae269 | 1482 | } |
78ab59fe KK |
1483 | attr->nres.run_off = attr->name_off; |
1484 | } else { | |
1485 | /* | |
1486 | * Node. Create empty resident data attribute. | |
1487 | */ | |
1488 | attr->type = ATTR_DATA; | |
1489 | attr->size = cpu_to_le32(SIZEOF_RESIDENT); | |
1490 | attr->name_off = SIZEOF_RESIDENT_LE; | |
1491 | if (fa & FILE_ATTRIBUTE_SPARSE_FILE) | |
1492 | attr->flags = ATTR_FLAG_SPARSED; | |
1493 | else if (fa & FILE_ATTRIBUTE_COMPRESSED) | |
1494 | attr->flags = ATTR_FLAG_COMPRESSED; | |
1495 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1496 | asize = SIZEOF_RESIDENT; | |
1497 | ni->ni_flags |= NI_FLAG_RESIDENT; | |
82cae269 KK |
1498 | } |
1499 | ||
1500 | if (S_ISDIR(mode)) { | |
1501 | ni->ni_flags |= NI_FLAG_DIR; | |
1502 | err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30); | |
1503 | if (err) | |
1504 | goto out4; | |
1505 | } else if (S_ISLNK(mode)) { | |
1506 | rp = ntfs_create_reparse_buffer(sbi, symname, size, &nsize); | |
1507 | ||
1508 | if (IS_ERR(rp)) { | |
1509 | err = PTR_ERR(rp); | |
1510 | rp = NULL; | |
1511 | goto out4; | |
1512 | } | |
1513 | ||
1514 | /* | |
e8b8e97f | 1515 | * Insert ATTR_REPARSE. |
82cae269 KK |
1516 | */ |
1517 | attr = Add2Ptr(attr, asize); | |
1518 | attr->type = ATTR_REPARSE; | |
1519 | attr->id = cpu_to_le16(aid++); | |
1520 | ||
e8b8e97f | 1521 | /* Resident or non resident? */ |
fa3cacf5 | 1522 | asize = ALIGN(SIZEOF_RESIDENT + nsize, 8); |
82cae269 KK |
1523 | t16 = PtrOffset(rec, attr); |
1524 | ||
14a98119 KK |
1525 | /* |
1526 | * Below function 'ntfs_save_wsl_perm' requires 0x78 bytes. | |
1527 | * It is good idea to keep extened attributes resident. | |
1528 | */ | |
78ab59fe | 1529 | if (asize + t16 + 0x78 + 8 > sbi->record_size) { |
82cae269 KK |
1530 | CLST alen; |
1531 | CLST clst = bytes_to_cluster(sbi, nsize); | |
1532 | ||
e8b8e97f | 1533 | /* Bytes per runs. */ |
82cae269 KK |
1534 | t16 = sbi->record_size - t16 - SIZEOF_NONRESIDENT; |
1535 | ||
1536 | attr->non_res = 1; | |
1537 | attr->nres.evcn = cpu_to_le64(clst - 1); | |
1538 | attr->name_off = SIZEOF_NONRESIDENT_LE; | |
1539 | attr->nres.run_off = attr->name_off; | |
1540 | attr->nres.data_size = cpu_to_le64(nsize); | |
1541 | attr->nres.valid_size = attr->nres.data_size; | |
1542 | attr->nres.alloc_size = | |
1543 | cpu_to_le64(ntfs_up_cluster(sbi, nsize)); | |
1544 | ||
1545 | err = attr_allocate_clusters(sbi, &ni->file.run, 0, 0, | |
c380b52f KK |
1546 | clst, NULL, ALLOCATE_DEF, |
1547 | &alen, 0, NULL, NULL); | |
82cae269 KK |
1548 | if (err) |
1549 | goto out5; | |
1550 | ||
1551 | err = run_pack(&ni->file.run, 0, clst, | |
1552 | Add2Ptr(attr, SIZEOF_NONRESIDENT), t16, | |
1553 | &vcn); | |
1554 | if (err < 0) | |
1555 | goto out5; | |
1556 | ||
1557 | if (vcn != clst) { | |
1558 | err = -EINVAL; | |
1559 | goto out5; | |
1560 | } | |
1561 | ||
fa3cacf5 | 1562 | asize = SIZEOF_NONRESIDENT + ALIGN(err, 8); |
1842fbc8 KK |
1563 | /* Write non resident data. */ |
1564 | err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rp, | |
1565 | nsize, 0); | |
1566 | if (err) | |
1567 | goto out5; | |
82cae269 KK |
1568 | } else { |
1569 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1570 | attr->res.data_size = cpu_to_le32(nsize); | |
1571 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), rp, nsize); | |
82cae269 | 1572 | } |
14a98119 KK |
1573 | /* Size of symlink equals the length of input string. */ |
1574 | inode->i_size = size; | |
82cae269 KK |
1575 | |
1576 | attr->size = cpu_to_le32(asize); | |
1577 | ||
1578 | err = ntfs_insert_reparse(sbi, IO_REPARSE_TAG_SYMLINK, | |
1579 | &new_de->ref); | |
1580 | if (err) | |
1581 | goto out5; | |
1582 | ||
1583 | rp_inserted = true; | |
1584 | } | |
1585 | ||
1586 | attr = Add2Ptr(attr, asize); | |
1587 | attr->type = ATTR_END; | |
1588 | ||
1589 | rec->used = cpu_to_le32(PtrOffset(rec, attr) + 8); | |
1590 | rec->next_attr_id = cpu_to_le16(aid); | |
1591 | ||
82cae269 KK |
1592 | inode->i_generation = le16_to_cpu(rec->seq); |
1593 | ||
82cae269 | 1594 | if (S_ISDIR(mode)) { |
82cae269 KK |
1595 | inode->i_op = &ntfs_dir_inode_operations; |
1596 | inode->i_fop = &ntfs_dir_operations; | |
1597 | } else if (S_ISLNK(mode)) { | |
1598 | inode->i_op = &ntfs_link_inode_operations; | |
1599 | inode->i_fop = NULL; | |
1600 | inode->i_mapping->a_ops = &ntfs_aops; | |
14a98119 KK |
1601 | inode->i_size = size; |
1602 | inode_nohighmem(inode); | |
82cae269 KK |
1603 | } else if (S_ISREG(mode)) { |
1604 | inode->i_op = &ntfs_file_inode_operations; | |
1605 | inode->i_fop = &ntfs_file_operations; | |
96de65a9 | 1606 | inode->i_mapping->a_ops = is_compressed(ni) ? &ntfs_aops_cmpr : |
f0377761 | 1607 | &ntfs_aops; |
82cae269 KK |
1608 | init_rwsem(&ni->file.run_lock); |
1609 | } else { | |
1610 | inode->i_op = &ntfs_special_inode_operations; | |
1611 | init_special_inode(inode, mode, dev); | |
1612 | } | |
1613 | ||
1614 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL | |
1615 | if (!S_ISLNK(mode) && (sb->s_flags & SB_POSIXACL)) { | |
700b7940 | 1616 | err = ntfs_init_acl(idmap, inode, dir); |
82cae269 | 1617 | if (err) |
1842fbc8 | 1618 | goto out5; |
82cae269 KK |
1619 | } else |
1620 | #endif | |
1621 | { | |
1622 | inode->i_flags |= S_NOSEC; | |
1623 | } | |
1624 | ||
1842fbc8 KK |
1625 | /* |
1626 | * ntfs_init_acl and ntfs_save_wsl_perm update extended attribute. | |
1627 | * The packed size of extended attribute is stored in direntry too. | |
1628 | * 'fname' here points to inside new_de. | |
1629 | */ | |
1630 | ntfs_save_wsl_perm(inode, &fname->dup.ea_size); | |
1631 | ||
1632 | /* | |
1633 | * update ea_size in file_name attribute too. | |
1634 | * Use ni_find_attr cause layout of MFT record may be changed | |
1635 | * in ntfs_init_acl and ntfs_save_wsl_perm. | |
1636 | */ | |
1637 | attr = ni_find_attr(ni, NULL, NULL, ATTR_NAME, NULL, 0, NULL, NULL); | |
1638 | if (attr) { | |
1639 | struct ATTR_FILE_NAME *fn; | |
1640 | ||
1641 | fn = resident_data_ex(attr, SIZEOF_ATTRIBUTE_FILENAME); | |
1642 | if (fn) | |
1643 | fn->dup.ea_size = fname->dup.ea_size; | |
82cae269 KK |
1644 | } |
1645 | ||
1842fbc8 KK |
1646 | /* We do not need to update parent directory later */ |
1647 | ni->ni_flags &= ~NI_FLAG_UPDATE_PARENT; | |
1648 | ||
1649 | /* Step 2: Add new name in index. */ | |
1650 | err = indx_insert_entry(&dir_ni->dir, dir_ni, new_de, sbi, fnd, 0); | |
1651 | if (err) | |
1652 | goto out6; | |
1653 | ||
e8b8e97f KA |
1654 | /* |
1655 | * Call 'd_instantiate' after inode->i_op is set | |
1656 | * but before finish_open. | |
1657 | */ | |
82cae269 KK |
1658 | d_instantiate(dentry, inode); |
1659 | ||
1842fbc8 KK |
1660 | /* Set original time. inode times (i_ctime) may be changed in ntfs_init_acl. */ |
1661 | inode->i_atime = inode->i_mtime = inode->i_ctime = dir->i_mtime = | |
1662 | dir->i_ctime = ni->i_crtime; | |
1663 | ||
82cae269 | 1664 | mark_inode_dirty(dir); |
78ab59fe | 1665 | mark_inode_dirty(inode); |
82cae269 | 1666 | |
e8b8e97f | 1667 | /* Normal exit. */ |
82cae269 KK |
1668 | goto out2; |
1669 | ||
82cae269 KK |
1670 | out6: |
1671 | if (rp_inserted) | |
1672 | ntfs_remove_reparse(sbi, IO_REPARSE_TAG_SYMLINK, &new_de->ref); | |
1673 | ||
1674 | out5: | |
0e8235d2 KK |
1675 | if (!S_ISDIR(mode)) |
1676 | run_deallocate(sbi, &ni->file.run, false); | |
82cae269 KK |
1677 | |
1678 | out4: | |
1679 | clear_rec_inuse(rec); | |
1680 | clear_nlink(inode); | |
1681 | ni->mi.dirty = false; | |
1682 | discard_new_inode(inode); | |
1683 | out3: | |
071100ea | 1684 | ntfs_mark_rec_free(sbi, ino, false); |
82cae269 KK |
1685 | |
1686 | out2: | |
1687 | __putname(new_de); | |
195c52bd | 1688 | kfree(rp); |
82cae269 KK |
1689 | |
1690 | out1: | |
1842fbc8 KK |
1691 | if (!fnd) |
1692 | ni_unlock(dir_ni); | |
1693 | ||
1694 | if (err) | |
82cae269 KK |
1695 | return ERR_PTR(err); |
1696 | ||
1697 | unlock_new_inode(inode); | |
1698 | ||
1699 | return inode; | |
1700 | } | |
1701 | ||
1702 | int ntfs_link_inode(struct inode *inode, struct dentry *dentry) | |
1703 | { | |
1704 | int err; | |
82cae269 | 1705 | struct ntfs_inode *ni = ntfs_i(inode); |
78ab59fe KK |
1706 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; |
1707 | struct NTFS_DE *de; | |
82cae269 | 1708 | |
e8b8e97f | 1709 | /* Allocate PATH_MAX bytes. */ |
78ab59fe KK |
1710 | de = __getname(); |
1711 | if (!de) | |
82cae269 KK |
1712 | return -ENOMEM; |
1713 | ||
78ab59fe KK |
1714 | /* Mark rw ntfs as dirty. It will be cleared at umount. */ |
1715 | ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); | |
82cae269 | 1716 | |
78ab59fe KK |
1717 | /* Construct 'de'. */ |
1718 | err = fill_name_de(sbi, de, &dentry->d_name, NULL); | |
82cae269 KK |
1719 | if (err) |
1720 | goto out; | |
1721 | ||
78ab59fe | 1722 | err = ni_add_name(ntfs_i(d_inode(dentry->d_parent)), ni, de); |
82cae269 | 1723 | out: |
78ab59fe | 1724 | __putname(de); |
82cae269 KK |
1725 | return err; |
1726 | } | |
1727 | ||
1728 | /* | |
1729 | * ntfs_unlink_inode | |
1730 | * | |
1731 | * inode_operations::unlink | |
1732 | * inode_operations::rmdir | |
1733 | */ | |
1734 | int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry) | |
1735 | { | |
1736 | int err; | |
78ab59fe | 1737 | struct ntfs_sb_info *sbi = dir->i_sb->s_fs_info; |
82cae269 KK |
1738 | struct inode *inode = d_inode(dentry); |
1739 | struct ntfs_inode *ni = ntfs_i(inode); | |
82cae269 | 1740 | struct ntfs_inode *dir_ni = ntfs_i(dir); |
78ab59fe KK |
1741 | struct NTFS_DE *de, *de2 = NULL; |
1742 | int undo_remove; | |
82cae269 | 1743 | |
78ab59fe | 1744 | if (ntfs_is_meta_file(sbi, ni->mi.rno)) |
82cae269 KK |
1745 | return -EINVAL; |
1746 | ||
78ab59fe KK |
1747 | /* Allocate PATH_MAX bytes. */ |
1748 | de = __getname(); | |
1749 | if (!de) | |
1750 | return -ENOMEM; | |
1751 | ||
82cae269 KK |
1752 | ni_lock(ni); |
1753 | ||
78ab59fe | 1754 | if (S_ISDIR(inode->i_mode) && !dir_is_empty(inode)) { |
82cae269 | 1755 | err = -ENOTEMPTY; |
78ab59fe | 1756 | goto out; |
82cae269 KK |
1757 | } |
1758 | ||
78ab59fe | 1759 | err = fill_name_de(sbi, de, &dentry->d_name, NULL); |
82cae269 | 1760 | if (err < 0) |
78ab59fe | 1761 | goto out; |
82cae269 | 1762 | |
78ab59fe KK |
1763 | undo_remove = 0; |
1764 | err = ni_remove_name(dir_ni, ni, de, &de2, &undo_remove); | |
82cae269 | 1765 | |
78ab59fe | 1766 | if (!err) { |
82cae269 | 1767 | drop_nlink(inode); |
78ab59fe KK |
1768 | dir->i_mtime = dir->i_ctime = current_time(dir); |
1769 | mark_inode_dirty(dir); | |
1770 | inode->i_ctime = dir->i_ctime; | |
1771 | if (inode->i_nlink) | |
1772 | mark_inode_dirty(inode); | |
1773 | } else if (!ni_remove_name_undo(dir_ni, ni, de, de2, undo_remove)) { | |
c12df45e | 1774 | _ntfs_bad_inode(inode); |
78ab59fe KK |
1775 | } else { |
1776 | if (ni_is_dirty(dir)) | |
1777 | mark_inode_dirty(dir); | |
1778 | if (ni_is_dirty(inode)) | |
1779 | mark_inode_dirty(inode); | |
82cae269 KK |
1780 | } |
1781 | ||
78ab59fe | 1782 | out: |
82cae269 | 1783 | ni_unlock(ni); |
78ab59fe | 1784 | __putname(de); |
82cae269 KK |
1785 | return err; |
1786 | } | |
1787 | ||
1788 | void ntfs_evict_inode(struct inode *inode) | |
1789 | { | |
1790 | truncate_inode_pages_final(&inode->i_data); | |
1791 | ||
82cae269 KK |
1792 | invalidate_inode_buffers(inode); |
1793 | clear_inode(inode); | |
1794 | ||
1795 | ni_clear(ntfs_i(inode)); | |
1796 | } | |
1797 | ||
0a4e7ce6 DP |
1798 | /* |
1799 | * ntfs_translate_junction | |
1800 | * | |
1801 | * Translate a Windows junction target to the Linux equivalent. | |
1802 | * On junctions, targets are always absolute (they include the drive | |
1803 | * letter). We have no way of knowing if the target is for the current | |
1804 | * mounted device or not so we just assume it is. | |
1805 | */ | |
1806 | static int ntfs_translate_junction(const struct super_block *sb, | |
1807 | const struct dentry *link_de, char *target, | |
1808 | int target_len, int target_max) | |
1809 | { | |
1810 | int tl_len, err = target_len; | |
1811 | char *link_path_buffer = NULL, *link_path; | |
1812 | char *translated = NULL; | |
1813 | char *target_start; | |
1814 | int copy_len; | |
1815 | ||
1816 | link_path_buffer = kmalloc(PATH_MAX, GFP_NOFS); | |
1817 | if (!link_path_buffer) { | |
1818 | err = -ENOMEM; | |
1819 | goto out; | |
1820 | } | |
1821 | /* Get link path, relative to mount point */ | |
1822 | link_path = dentry_path_raw(link_de, link_path_buffer, PATH_MAX); | |
1823 | if (IS_ERR(link_path)) { | |
1824 | ntfs_err(sb, "Error getting link path"); | |
1825 | err = -EINVAL; | |
1826 | goto out; | |
1827 | } | |
1828 | ||
1829 | translated = kmalloc(PATH_MAX, GFP_NOFS); | |
1830 | if (!translated) { | |
1831 | err = -ENOMEM; | |
1832 | goto out; | |
1833 | } | |
1834 | ||
1835 | /* Make translated path a relative path to mount point */ | |
1836 | strcpy(translated, "./"); | |
07f4aa9d | 1837 | ++link_path; /* Skip leading / */ |
0a4e7ce6 DP |
1838 | for (tl_len = sizeof("./") - 1; *link_path; ++link_path) { |
1839 | if (*link_path == '/') { | |
1840 | if (PATH_MAX - tl_len < sizeof("../")) { | |
07f4aa9d KK |
1841 | ntfs_err(sb, |
1842 | "Link path %s has too many components", | |
0a4e7ce6 DP |
1843 | link_path); |
1844 | err = -EINVAL; | |
1845 | goto out; | |
1846 | } | |
1847 | strcpy(translated + tl_len, "../"); | |
1848 | tl_len += sizeof("../") - 1; | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | /* Skip drive letter */ | |
1853 | target_start = target; | |
1854 | while (*target_start && *target_start != ':') | |
1855 | ++target_start; | |
1856 | ||
1857 | if (!*target_start) { | |
07f4aa9d KK |
1858 | ntfs_err(sb, "Link target (%s) missing drive separator", |
1859 | target); | |
0a4e7ce6 DP |
1860 | err = -EINVAL; |
1861 | goto out; | |
1862 | } | |
1863 | ||
1864 | /* Skip drive separator and leading /, if exists */ | |
1865 | target_start += 1 + (target_start[1] == '/'); | |
1866 | copy_len = target_len - (target_start - target); | |
1867 | ||
1868 | if (PATH_MAX - tl_len <= copy_len) { | |
1869 | ntfs_err(sb, "Link target %s too large for buffer (%d <= %d)", | |
1870 | target_start, PATH_MAX - tl_len, copy_len); | |
1871 | err = -EINVAL; | |
1872 | goto out; | |
1873 | } | |
1874 | ||
1875 | /* translated path has a trailing / and target_start does not */ | |
1876 | strcpy(translated + tl_len, target_start); | |
1877 | tl_len += copy_len; | |
1878 | if (target_max <= tl_len) { | |
1879 | ntfs_err(sb, "Target path %s too large for buffer (%d <= %d)", | |
1880 | translated, target_max, tl_len); | |
1881 | err = -EINVAL; | |
1882 | goto out; | |
1883 | } | |
1884 | strcpy(target, translated); | |
1885 | err = tl_len; | |
1886 | ||
1887 | out: | |
1888 | kfree(link_path_buffer); | |
1889 | kfree(translated); | |
1890 | return err; | |
1891 | } | |
1892 | ||
1893 | static noinline int ntfs_readlink_hlp(const struct dentry *link_de, | |
1894 | struct inode *inode, char *buffer, | |
82cae269 KK |
1895 | int buflen) |
1896 | { | |
4dbe8e44 | 1897 | int i, err = -EINVAL; |
82cae269 KK |
1898 | struct ntfs_inode *ni = ntfs_i(inode); |
1899 | struct super_block *sb = inode->i_sb; | |
1900 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
4dbe8e44 KK |
1901 | u64 size; |
1902 | u16 ulen = 0; | |
82cae269 KK |
1903 | void *to_free = NULL; |
1904 | struct REPARSE_DATA_BUFFER *rp; | |
4dbe8e44 | 1905 | const __le16 *uname; |
82cae269 KK |
1906 | struct ATTRIB *attr; |
1907 | ||
e8b8e97f | 1908 | /* Reparse data present. Try to parse it. */ |
82cae269 KK |
1909 | static_assert(!offsetof(struct REPARSE_DATA_BUFFER, ReparseTag)); |
1910 | static_assert(sizeof(u32) == sizeof(rp->ReparseTag)); | |
1911 | ||
1912 | *buffer = 0; | |
1913 | ||
82cae269 | 1914 | attr = ni_find_attr(ni, NULL, NULL, ATTR_REPARSE, NULL, 0, NULL, NULL); |
4dbe8e44 | 1915 | if (!attr) |
82cae269 | 1916 | goto out; |
82cae269 KK |
1917 | |
1918 | if (!attr->non_res) { | |
4dbe8e44 KK |
1919 | rp = resident_data_ex(attr, sizeof(struct REPARSE_DATA_BUFFER)); |
1920 | if (!rp) | |
82cae269 | 1921 | goto out; |
4dbe8e44 | 1922 | size = le32_to_cpu(attr->res.data_size); |
82cae269 | 1923 | } else { |
4dbe8e44 KK |
1924 | size = le64_to_cpu(attr->nres.data_size); |
1925 | rp = NULL; | |
1926 | } | |
1927 | ||
1928 | if (size > sbi->reparse.max_size || size <= sizeof(u32)) | |
1929 | goto out; | |
1930 | ||
1931 | if (!rp) { | |
1932 | rp = kmalloc(size, GFP_NOFS); | |
82cae269 KK |
1933 | if (!rp) { |
1934 | err = -ENOMEM; | |
1935 | goto out; | |
1936 | } | |
1937 | to_free = rp; | |
4dbe8e44 KK |
1938 | /* Read into temporal buffer. */ |
1939 | err = ntfs_read_run_nb(sbi, &ni->file.run, 0, rp, size, NULL); | |
82cae269 KK |
1940 | if (err) |
1941 | goto out; | |
1942 | } | |
1943 | ||
e8b8e97f | 1944 | /* Microsoft Tag. */ |
82cae269 KK |
1945 | switch (rp->ReparseTag) { |
1946 | case IO_REPARSE_TAG_MOUNT_POINT: | |
e8b8e97f | 1947 | /* Mount points and junctions. */ |
82cae269 | 1948 | /* Can we use 'Rp->MountPointReparseBuffer.PrintNameLength'? */ |
4dbe8e44 KK |
1949 | if (size <= offsetof(struct REPARSE_DATA_BUFFER, |
1950 | MountPointReparseBuffer.PathBuffer)) | |
82cae269 | 1951 | goto out; |
4dbe8e44 KK |
1952 | uname = Add2Ptr(rp, |
1953 | offsetof(struct REPARSE_DATA_BUFFER, | |
1954 | MountPointReparseBuffer.PathBuffer) + | |
1955 | le16_to_cpu(rp->MountPointReparseBuffer | |
1956 | .PrintNameOffset)); | |
1957 | ulen = le16_to_cpu(rp->MountPointReparseBuffer.PrintNameLength); | |
82cae269 KK |
1958 | break; |
1959 | ||
1960 | case IO_REPARSE_TAG_SYMLINK: | |
1961 | /* FolderSymbolicLink */ | |
1962 | /* Can we use 'Rp->SymbolicLinkReparseBuffer.PrintNameLength'? */ | |
4dbe8e44 KK |
1963 | if (size <= offsetof(struct REPARSE_DATA_BUFFER, |
1964 | SymbolicLinkReparseBuffer.PathBuffer)) | |
82cae269 | 1965 | goto out; |
4dbe8e44 KK |
1966 | uname = Add2Ptr( |
1967 | rp, offsetof(struct REPARSE_DATA_BUFFER, | |
1968 | SymbolicLinkReparseBuffer.PathBuffer) + | |
1969 | le16_to_cpu(rp->SymbolicLinkReparseBuffer | |
1970 | .PrintNameOffset)); | |
1971 | ulen = le16_to_cpu( | |
82cae269 KK |
1972 | rp->SymbolicLinkReparseBuffer.PrintNameLength); |
1973 | break; | |
1974 | ||
1975 | case IO_REPARSE_TAG_CLOUD: | |
1976 | case IO_REPARSE_TAG_CLOUD_1: | |
1977 | case IO_REPARSE_TAG_CLOUD_2: | |
1978 | case IO_REPARSE_TAG_CLOUD_3: | |
1979 | case IO_REPARSE_TAG_CLOUD_4: | |
1980 | case IO_REPARSE_TAG_CLOUD_5: | |
1981 | case IO_REPARSE_TAG_CLOUD_6: | |
1982 | case IO_REPARSE_TAG_CLOUD_7: | |
1983 | case IO_REPARSE_TAG_CLOUD_8: | |
1984 | case IO_REPARSE_TAG_CLOUD_9: | |
1985 | case IO_REPARSE_TAG_CLOUD_A: | |
1986 | case IO_REPARSE_TAG_CLOUD_B: | |
1987 | case IO_REPARSE_TAG_CLOUD_C: | |
1988 | case IO_REPARSE_TAG_CLOUD_D: | |
1989 | case IO_REPARSE_TAG_CLOUD_E: | |
1990 | case IO_REPARSE_TAG_CLOUD_F: | |
1991 | err = sizeof("OneDrive") - 1; | |
1992 | if (err > buflen) | |
1993 | err = buflen; | |
1994 | memcpy(buffer, "OneDrive", err); | |
1995 | goto out; | |
1996 | ||
1997 | default: | |
1998 | if (IsReparseTagMicrosoft(rp->ReparseTag)) { | |
d3624466 | 1999 | /* Unknown Microsoft Tag. */ |
82cae269 KK |
2000 | goto out; |
2001 | } | |
2002 | if (!IsReparseTagNameSurrogate(rp->ReparseTag) || | |
4dbe8e44 | 2003 | size <= sizeof(struct REPARSE_POINT)) { |
82cae269 KK |
2004 | goto out; |
2005 | } | |
2006 | ||
e8b8e97f | 2007 | /* Users tag. */ |
4dbe8e44 KK |
2008 | uname = Add2Ptr(rp, sizeof(struct REPARSE_POINT)); |
2009 | ulen = le16_to_cpu(rp->ReparseDataLength) - | |
82cae269 KK |
2010 | sizeof(struct REPARSE_POINT); |
2011 | } | |
2012 | ||
e8b8e97f | 2013 | /* Convert nlen from bytes to UNICODE chars. */ |
4dbe8e44 | 2014 | ulen >>= 1; |
82cae269 | 2015 | |
e8b8e97f | 2016 | /* Check that name is available. */ |
4dbe8e44 | 2017 | if (!ulen || uname + ulen > (__le16 *)Add2Ptr(rp, size)) |
82cae269 KK |
2018 | goto out; |
2019 | ||
e8b8e97f | 2020 | /* If name is already zero terminated then truncate it now. */ |
4dbe8e44 KK |
2021 | if (!uname[ulen - 1]) |
2022 | ulen -= 1; | |
82cae269 | 2023 | |
4dbe8e44 | 2024 | err = ntfs_utf16_to_nls(sbi, uname, ulen, buffer, buflen); |
82cae269 KK |
2025 | |
2026 | if (err < 0) | |
2027 | goto out; | |
2028 | ||
e8b8e97f | 2029 | /* Translate Windows '\' into Linux '/'. */ |
82cae269 KK |
2030 | for (i = 0; i < err; i++) { |
2031 | if (buffer[i] == '\\') | |
2032 | buffer[i] = '/'; | |
2033 | } | |
2034 | ||
e8b8e97f | 2035 | /* Always set last zero. */ |
82cae269 | 2036 | buffer[err] = 0; |
0a4e7ce6 DP |
2037 | |
2038 | /* If this is a junction, translate the link target. */ | |
2039 | if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) | |
2040 | err = ntfs_translate_junction(sb, link_de, buffer, err, buflen); | |
2041 | ||
82cae269 | 2042 | out: |
195c52bd | 2043 | kfree(to_free); |
82cae269 KK |
2044 | return err; |
2045 | } | |
2046 | ||
2047 | static const char *ntfs_get_link(struct dentry *de, struct inode *inode, | |
2048 | struct delayed_call *done) | |
2049 | { | |
2050 | int err; | |
2051 | char *ret; | |
2052 | ||
2053 | if (!de) | |
2054 | return ERR_PTR(-ECHILD); | |
2055 | ||
2056 | ret = kmalloc(PAGE_SIZE, GFP_NOFS); | |
2057 | if (!ret) | |
2058 | return ERR_PTR(-ENOMEM); | |
2059 | ||
0a4e7ce6 | 2060 | err = ntfs_readlink_hlp(de, inode, ret, PAGE_SIZE); |
82cae269 KK |
2061 | if (err < 0) { |
2062 | kfree(ret); | |
2063 | return ERR_PTR(err); | |
2064 | } | |
2065 | ||
2066 | set_delayed_call(done, kfree_link, ret); | |
2067 | ||
2068 | return ret; | |
2069 | } | |
2070 | ||
2071 | // clang-format off | |
2072 | const struct inode_operations ntfs_link_inode_operations = { | |
2073 | .get_link = ntfs_get_link, | |
2074 | .setattr = ntfs3_setattr, | |
2075 | .listxattr = ntfs_listxattr, | |
82cae269 KK |
2076 | }; |
2077 | ||
2078 | const struct address_space_operations ntfs_aops = { | |
f132ab7d | 2079 | .read_folio = ntfs_read_folio, |
82cae269 | 2080 | .readahead = ntfs_readahead, |
82cae269 KK |
2081 | .writepages = ntfs_writepages, |
2082 | .write_begin = ntfs_write_begin, | |
2083 | .write_end = ntfs_write_end, | |
2084 | .direct_IO = ntfs_direct_IO, | |
2085 | .bmap = ntfs_bmap, | |
e621900a | 2086 | .dirty_folio = block_dirty_folio, |
25a89826 | 2087 | .migrate_folio = buffer_migrate_folio, |
724bbe49 | 2088 | .invalidate_folio = block_invalidate_folio, |
82cae269 KK |
2089 | }; |
2090 | ||
2091 | const struct address_space_operations ntfs_aops_cmpr = { | |
f132ab7d | 2092 | .read_folio = ntfs_read_folio, |
82cae269 KK |
2093 | .readahead = ntfs_readahead, |
2094 | }; | |
2095 | // clang-format on |