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; | |
110b24eb | 40 | u16 roff, rsize, names = 0, links = 0; |
82cae269 KK |
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; | |
2be861fa | 47 | struct timespec64 ts; |
82cae269 KK |
48 | |
49 | inode->i_op = NULL; | |
50 | /* Setup 'uid' and 'gid' */ | |
564c97bd KA |
51 | inode->i_uid = sbi->options->fs_uid; |
52 | inode->i_gid = sbi->options->fs_gid; | |
82cae269 KK |
53 | |
54 | err = mi_init(&ni->mi, sbi, ino); | |
55 | if (err) | |
56 | goto out; | |
57 | ||
58 | if (!sbi->mft.ni && ino == MFT_REC_MFT && !sb->s_root) { | |
59 | t64 = sbi->mft.lbo >> sbi->cluster_bits; | |
60 | t32 = bytes_to_cluster(sbi, MFT_REC_VOL * sbi->record_size); | |
61 | sbi->mft.ni = ni; | |
62 | init_rwsem(&ni->file.run_lock); | |
63 | ||
64 | if (!run_add_entry(&ni->file.run, 0, t64, t32, true)) { | |
65 | err = -ENOMEM; | |
66 | goto out; | |
67 | } | |
68 | } | |
69 | ||
70 | err = mi_read(&ni->mi, ino == MFT_REC_MFT); | |
71 | ||
72 | if (err) | |
73 | goto out; | |
74 | ||
75 | rec = ni->mi.mrec; | |
76 | ||
77 | if (sbi->flags & NTFS_FLAGS_LOG_REPLAYING) { | |
78 | ; | |
79 | } else if (ref->seq != rec->seq) { | |
80 | err = -EINVAL; | |
81 | ntfs_err(sb, "MFT: r=%lx, expect seq=%x instead of %x!", ino, | |
82 | le16_to_cpu(ref->seq), le16_to_cpu(rec->seq)); | |
83 | goto out; | |
84 | } else if (!is_rec_inuse(rec)) { | |
0e8235d2 | 85 | err = -ESTALE; |
82cae269 KK |
86 | ntfs_err(sb, "Inode r=%x is not in use!", (u32)ino); |
87 | goto out; | |
88 | } | |
89 | ||
90 | if (le32_to_cpu(rec->total) != sbi->record_size) { | |
d3624466 | 91 | /* Bad inode? */ |
82cae269 KK |
92 | err = -EINVAL; |
93 | goto out; | |
94 | } | |
95 | ||
0e8235d2 KK |
96 | if (!is_rec_base(rec)) { |
97 | err = -EINVAL; | |
98 | goto out; | |
99 | } | |
82cae269 | 100 | |
e8b8e97f | 101 | /* Record should contain $I30 root. */ |
82cae269 KK |
102 | is_dir = rec->flags & RECORD_FLAG_DIR; |
103 | ||
98bea253 EL |
104 | /* MFT_REC_MFT is not a dir */ |
105 | if (is_dir && ino == MFT_REC_MFT) { | |
106 | err = -EINVAL; | |
107 | goto out; | |
108 | } | |
109 | ||
82cae269 KK |
110 | inode->i_generation = le16_to_cpu(rec->seq); |
111 | ||
e8b8e97f | 112 | /* Enumerate all struct Attributes MFT. */ |
82cae269 KK |
113 | le = NULL; |
114 | attr = NULL; | |
115 | ||
116 | /* | |
e8b8e97f | 117 | * To reduce tab pressure use goto instead of |
82cae269 KK |
118 | * while( (attr = ni_enum_attr_ex(ni, attr, &le, NULL) )) |
119 | */ | |
120 | next_attr: | |
121 | run = NULL; | |
122 | err = -EINVAL; | |
123 | attr = ni_enum_attr_ex(ni, attr, &le, NULL); | |
124 | if (!attr) | |
125 | goto end_enum; | |
126 | ||
127 | if (le && le->vcn) { | |
e8b8e97f | 128 | /* This is non primary attribute segment. Ignore if not MFT. */ |
82cae269 KK |
129 | if (ino != MFT_REC_MFT || attr->type != ATTR_DATA) |
130 | goto next_attr; | |
131 | ||
132 | run = &ni->file.run; | |
133 | asize = le32_to_cpu(attr->size); | |
134 | goto attr_unpack_run; | |
135 | } | |
136 | ||
137 | roff = attr->non_res ? 0 : le16_to_cpu(attr->res.data_off); | |
138 | rsize = attr->non_res ? 0 : le32_to_cpu(attr->res.data_size); | |
139 | asize = le32_to_cpu(attr->size); | |
140 | ||
0addfb1c KK |
141 | /* |
142 | * Really this check was done in 'ni_enum_attr_ex' -> ... 'mi_enum_attr'. | |
143 | * There not critical to check this case again | |
144 | */ | |
145 | if (attr->name_len && | |
146 | sizeof(short) * attr->name_len + le16_to_cpu(attr->name_off) > | |
147 | asize) | |
4f1dc7d9 EL |
148 | goto out; |
149 | ||
019d22eb AN |
150 | if (attr->non_res) { |
151 | t64 = le64_to_cpu(attr->nres.alloc_size); | |
152 | if (le64_to_cpu(attr->nres.data_size) > t64 || | |
153 | le64_to_cpu(attr->nres.valid_size) > t64) | |
154 | goto out; | |
155 | } | |
156 | ||
82cae269 KK |
157 | switch (attr->type) { |
158 | case ATTR_STD: | |
159 | if (attr->non_res || | |
160 | asize < sizeof(struct ATTR_STD_INFO) + roff || | |
161 | rsize < sizeof(struct ATTR_STD_INFO)) | |
162 | goto out; | |
163 | ||
164 | if (std5) | |
165 | goto next_attr; | |
166 | ||
167 | std5 = Add2Ptr(attr, roff); | |
168 | ||
169 | #ifdef STATX_BTIME | |
170 | nt2kernel(std5->cr_time, &ni->i_crtime); | |
171 | #endif | |
2be861fa JL |
172 | nt2kernel(std5->a_time, &ts); |
173 | inode_set_atime_to_ts(inode, ts); | |
174 | nt2kernel(std5->c_time, &ts); | |
175 | inode_set_ctime_to_ts(inode, ts); | |
176 | nt2kernel(std5->m_time, &ts); | |
177 | inode_set_mtime_to_ts(inode, ts); | |
82cae269 KK |
178 | |
179 | ni->std_fa = std5->fa; | |
180 | ||
181 | if (asize >= sizeof(struct ATTR_STD_INFO5) + roff && | |
182 | rsize >= sizeof(struct ATTR_STD_INFO5)) | |
183 | ni->std_security_id = std5->security_id; | |
184 | goto next_attr; | |
185 | ||
186 | case ATTR_LIST: | |
187 | if (attr->name_len || le || ino == MFT_REC_LOG) | |
188 | goto out; | |
189 | ||
190 | err = ntfs_load_attr_list(ni, attr); | |
191 | if (err) | |
192 | goto out; | |
193 | ||
194 | le = NULL; | |
195 | attr = NULL; | |
196 | goto next_attr; | |
197 | ||
198 | case ATTR_NAME: | |
199 | if (attr->non_res || asize < SIZEOF_ATTRIBUTE_FILENAME + roff || | |
200 | rsize < SIZEOF_ATTRIBUTE_FILENAME) | |
201 | goto out; | |
202 | ||
110b24eb | 203 | names += 1; |
82cae269 KK |
204 | fname = Add2Ptr(attr, roff); |
205 | if (fname->type == FILE_NAME_DOS) | |
206 | goto next_attr; | |
207 | ||
110b24eb | 208 | links += 1; |
82cae269 KK |
209 | if (name && name->len == fname->name_len && |
210 | !ntfs_cmp_names_cpu(name, (struct le_str *)&fname->name_len, | |
211 | NULL, false)) | |
212 | is_match = true; | |
213 | ||
214 | goto next_attr; | |
215 | ||
216 | case ATTR_DATA: | |
217 | if (is_dir) { | |
e8b8e97f | 218 | /* Ignore data attribute in dir record. */ |
82cae269 KK |
219 | goto next_attr; |
220 | } | |
221 | ||
222 | if (ino == MFT_REC_BADCLUST && !attr->non_res) | |
223 | goto next_attr; | |
224 | ||
225 | if (attr->name_len && | |
226 | ((ino != MFT_REC_BADCLUST || !attr->non_res || | |
227 | attr->name_len != ARRAY_SIZE(BAD_NAME) || | |
228 | memcmp(attr_name(attr), BAD_NAME, sizeof(BAD_NAME))) && | |
229 | (ino != MFT_REC_SECURE || !attr->non_res || | |
230 | attr->name_len != ARRAY_SIZE(SDS_NAME) || | |
231 | memcmp(attr_name(attr), SDS_NAME, sizeof(SDS_NAME))))) { | |
e8b8e97f | 232 | /* File contains stream attribute. Ignore it. */ |
82cae269 KK |
233 | goto next_attr; |
234 | } | |
235 | ||
236 | if (is_attr_sparsed(attr)) | |
237 | ni->std_fa |= FILE_ATTRIBUTE_SPARSE_FILE; | |
238 | else | |
239 | ni->std_fa &= ~FILE_ATTRIBUTE_SPARSE_FILE; | |
240 | ||
241 | if (is_attr_compressed(attr)) | |
242 | ni->std_fa |= FILE_ATTRIBUTE_COMPRESSED; | |
243 | else | |
244 | ni->std_fa &= ~FILE_ATTRIBUTE_COMPRESSED; | |
245 | ||
246 | if (is_attr_encrypted(attr)) | |
247 | ni->std_fa |= FILE_ATTRIBUTE_ENCRYPTED; | |
248 | else | |
249 | ni->std_fa &= ~FILE_ATTRIBUTE_ENCRYPTED; | |
250 | ||
251 | if (!attr->non_res) { | |
252 | ni->i_valid = inode->i_size = rsize; | |
253 | inode_set_bytes(inode, rsize); | |
82cae269 KK |
254 | } |
255 | ||
564c97bd | 256 | mode = S_IFREG | (0777 & sbi->options->fs_fmask_inv); |
82cae269 KK |
257 | |
258 | if (!attr->non_res) { | |
259 | ni->ni_flags |= NI_FLAG_RESIDENT; | |
260 | goto next_attr; | |
261 | } | |
262 | ||
263 | inode_set_bytes(inode, attr_ondisk_size(attr)); | |
264 | ||
265 | ni->i_valid = le64_to_cpu(attr->nres.valid_size); | |
266 | inode->i_size = le64_to_cpu(attr->nres.data_size); | |
267 | if (!attr->nres.alloc_size) | |
268 | goto next_attr; | |
269 | ||
96de65a9 | 270 | run = ino == MFT_REC_BITMAP ? &sbi->used.bitmap.run : |
f0377761 | 271 | &ni->file.run; |
82cae269 KK |
272 | break; |
273 | ||
274 | case ATTR_ROOT: | |
275 | if (attr->non_res) | |
276 | goto out; | |
277 | ||
278 | root = Add2Ptr(attr, roff); | |
82cae269 KK |
279 | |
280 | if (attr->name_len != ARRAY_SIZE(I30_NAME) || | |
281 | memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME))) | |
282 | goto next_attr; | |
283 | ||
284 | if (root->type != ATTR_NAME || | |
285 | root->rule != NTFS_COLLATION_TYPE_FILENAME) | |
286 | goto out; | |
287 | ||
288 | if (!is_dir) | |
289 | goto next_attr; | |
290 | ||
bfa434c6 | 291 | is_root = true; |
82cae269 KK |
292 | ni->ni_flags |= NI_FLAG_DIR; |
293 | ||
294 | err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30); | |
295 | if (err) | |
296 | goto out; | |
297 | ||
96de65a9 | 298 | mode = sb->s_root ? |
f0377761 KK |
299 | (S_IFDIR | (0777 & sbi->options->fs_dmask_inv)) : |
300 | (S_IFDIR | 0777); | |
82cae269 KK |
301 | goto next_attr; |
302 | ||
303 | case ATTR_ALLOC: | |
304 | if (!is_root || attr->name_len != ARRAY_SIZE(I30_NAME) || | |
305 | memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME))) | |
306 | goto next_attr; | |
307 | ||
308 | inode->i_size = le64_to_cpu(attr->nres.data_size); | |
309 | ni->i_valid = le64_to_cpu(attr->nres.valid_size); | |
310 | inode_set_bytes(inode, le64_to_cpu(attr->nres.alloc_size)); | |
311 | ||
312 | run = &ni->dir.alloc_run; | |
313 | break; | |
314 | ||
315 | case ATTR_BITMAP: | |
316 | if (ino == MFT_REC_MFT) { | |
317 | if (!attr->non_res) | |
318 | goto out; | |
319 | #ifndef CONFIG_NTFS3_64BIT_CLUSTER | |
320 | /* 0x20000000 = 2^32 / 8 */ | |
321 | if (le64_to_cpu(attr->nres.alloc_size) >= 0x20000000) | |
322 | goto out; | |
323 | #endif | |
324 | run = &sbi->mft.bitmap.run; | |
325 | break; | |
326 | } else if (is_dir && attr->name_len == ARRAY_SIZE(I30_NAME) && | |
327 | !memcmp(attr_name(attr), I30_NAME, | |
328 | sizeof(I30_NAME)) && | |
329 | attr->non_res) { | |
330 | run = &ni->dir.bitmap_run; | |
331 | break; | |
332 | } | |
333 | goto next_attr; | |
334 | ||
335 | case ATTR_REPARSE: | |
336 | if (attr->name_len) | |
337 | goto next_attr; | |
338 | ||
339 | rp_fa = ni_parse_reparse(ni, attr, &rp); | |
340 | switch (rp_fa) { | |
341 | case REPARSE_LINK: | |
22b05f1a KK |
342 | /* |
343 | * Normal symlink. | |
344 | * Assume one unicode symbol == one utf8. | |
345 | */ | |
346 | inode->i_size = le16_to_cpu(rp.SymbolicLinkReparseBuffer | |
347 | .PrintNameLength) / | |
348 | sizeof(u16); | |
82cae269 | 349 | ni->i_valid = inode->i_size; |
e8b8e97f | 350 | /* Clear directory bit. */ |
82cae269 KK |
351 | if (ni->ni_flags & NI_FLAG_DIR) { |
352 | indx_clear(&ni->dir); | |
353 | memset(&ni->dir, 0, sizeof(ni->dir)); | |
354 | ni->ni_flags &= ~NI_FLAG_DIR; | |
355 | } else { | |
356 | run_close(&ni->file.run); | |
357 | } | |
358 | mode = S_IFLNK | 0777; | |
359 | is_dir = false; | |
360 | if (attr->non_res) { | |
361 | run = &ni->file.run; | |
e8b8e97f | 362 | goto attr_unpack_run; // Double break. |
82cae269 KK |
363 | } |
364 | break; | |
365 | ||
366 | case REPARSE_COMPRESSED: | |
367 | break; | |
368 | ||
369 | case REPARSE_DEDUPLICATED: | |
370 | break; | |
371 | } | |
372 | goto next_attr; | |
373 | ||
374 | case ATTR_EA_INFO: | |
375 | if (!attr->name_len && | |
376 | resident_data_ex(attr, sizeof(struct EA_INFO))) { | |
377 | ni->ni_flags |= NI_FLAG_EA; | |
378 | /* | |
379 | * ntfs_get_wsl_perm updates inode->i_uid, inode->i_gid, inode->i_mode | |
380 | */ | |
381 | inode->i_mode = mode; | |
382 | ntfs_get_wsl_perm(inode); | |
383 | mode = inode->i_mode; | |
384 | } | |
385 | goto next_attr; | |
386 | ||
387 | default: | |
388 | goto next_attr; | |
389 | } | |
390 | ||
391 | attr_unpack_run: | |
392 | roff = le16_to_cpu(attr->nres.run_off); | |
393 | ||
6db62086 EL |
394 | if (roff > asize) { |
395 | err = -EINVAL; | |
396 | goto out; | |
397 | } | |
398 | ||
82cae269 | 399 | t64 = le64_to_cpu(attr->nres.svcn); |
887bfc54 | 400 | |
82cae269 KK |
401 | err = run_unpack_ex(run, sbi, ino, t64, le64_to_cpu(attr->nres.evcn), |
402 | t64, Add2Ptr(attr, roff), asize - roff); | |
403 | if (err < 0) | |
404 | goto out; | |
405 | err = 0; | |
406 | goto next_attr; | |
407 | ||
408 | end_enum: | |
409 | ||
410 | if (!std5) | |
411 | goto out; | |
412 | ||
413 | if (!is_match && name) { | |
82cae269 KK |
414 | err = -ENOENT; |
415 | goto out; | |
416 | } | |
417 | ||
418 | if (std5->fa & FILE_ATTRIBUTE_READONLY) | |
419 | mode &= ~0222; | |
420 | ||
421 | if (!names) { | |
422 | err = -EINVAL; | |
423 | goto out; | |
424 | } | |
425 | ||
78ab59fe KK |
426 | if (names != le16_to_cpu(rec->hard_links)) { |
427 | /* Correct minor error on the fly. Do not mark inode as dirty. */ | |
85ba2a75 | 428 | ntfs_inode_warn(inode, "Correct links count -> %u.", names); |
78ab59fe KK |
429 | rec->hard_links = cpu_to_le16(names); |
430 | ni->mi.dirty = true; | |
431 | } | |
432 | ||
110b24eb | 433 | set_nlink(inode, links); |
82cae269 KK |
434 | |
435 | if (S_ISDIR(mode)) { | |
436 | ni->std_fa |= FILE_ATTRIBUTE_DIRECTORY; | |
437 | ||
438 | /* | |
e8b8e97f | 439 | * Dot and dot-dot should be included in count but was not |
82cae269 | 440 | * included in enumeration. |
e8b8e97f | 441 | * Usually a hard links to directories are disabled. |
82cae269 KK |
442 | */ |
443 | inode->i_op = &ntfs_dir_inode_operations; | |
9b872cc5 CB |
444 | if (is_legacy_ntfs(inode->i_sb)) |
445 | inode->i_fop = &ntfs_legacy_dir_operations; | |
446 | else | |
447 | inode->i_fop = &ntfs_dir_operations; | |
82cae269 KK |
448 | ni->i_valid = 0; |
449 | } else if (S_ISLNK(mode)) { | |
450 | ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY; | |
451 | inode->i_op = &ntfs_link_inode_operations; | |
452 | inode->i_fop = NULL; | |
22b05f1a | 453 | inode_nohighmem(inode); |
82cae269 KK |
454 | } else if (S_ISREG(mode)) { |
455 | ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY; | |
456 | inode->i_op = &ntfs_file_inode_operations; | |
9b872cc5 CB |
457 | if (is_legacy_ntfs(inode->i_sb)) |
458 | inode->i_fop = &ntfs_legacy_file_operations; | |
459 | else | |
460 | inode->i_fop = &ntfs_file_operations; | |
96de65a9 | 461 | inode->i_mapping->a_ops = is_compressed(ni) ? &ntfs_aops_cmpr : |
f0377761 | 462 | &ntfs_aops; |
82cae269 KK |
463 | if (ino != MFT_REC_MFT) |
464 | init_rwsem(&ni->file.run_lock); | |
465 | } else if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISFIFO(mode) || | |
466 | S_ISSOCK(mode)) { | |
467 | inode->i_op = &ntfs_special_inode_operations; | |
468 | init_special_inode(inode, mode, inode->i_rdev); | |
469 | } else if (fname && fname->home.low == cpu_to_le32(MFT_REC_EXTEND) && | |
470 | fname->home.seq == cpu_to_le16(MFT_REC_EXTEND)) { | |
e8b8e97f | 471 | /* Records in $Extend are not a files or general directories. */ |
37a530bf | 472 | inode->i_op = &ntfs_file_inode_operations; |
82cae269 KK |
473 | } else { |
474 | err = -EINVAL; | |
475 | goto out; | |
476 | } | |
477 | ||
564c97bd | 478 | if ((sbi->options->sys_immutable && |
82cae269 KK |
479 | (std5->fa & FILE_ATTRIBUTE_SYSTEM)) && |
480 | !S_ISFIFO(mode) && !S_ISSOCK(mode) && !S_ISLNK(mode)) { | |
481 | inode->i_flags |= S_IMMUTABLE; | |
482 | } else { | |
483 | inode->i_flags &= ~S_IMMUTABLE; | |
484 | } | |
485 | ||
486 | inode->i_mode = mode; | |
487 | if (!(ni->ni_flags & NI_FLAG_EA)) { | |
e8b8e97f | 488 | /* If no xattr then no security (stored in xattr). */ |
82cae269 KK |
489 | inode->i_flags |= S_NOSEC; |
490 | } | |
491 | ||
82cae269 KK |
492 | if (ino == MFT_REC_MFT && !sb->s_root) |
493 | sbi->mft.ni = NULL; | |
494 | ||
495 | unlock_new_inode(inode); | |
496 | ||
497 | return inode; | |
498 | ||
499 | out: | |
500 | if (ino == MFT_REC_MFT && !sb->s_root) | |
501 | sbi->mft.ni = NULL; | |
502 | ||
503 | iget_failed(inode); | |
504 | return ERR_PTR(err); | |
505 | } | |
506 | ||
e8b8e97f KA |
507 | /* |
508 | * ntfs_test_inode | |
509 | * | |
510 | * Return: 1 if match. | |
511 | */ | |
82cae269 KK |
512 | static int ntfs_test_inode(struct inode *inode, void *data) |
513 | { | |
514 | struct MFT_REF *ref = data; | |
515 | ||
516 | return ino_get(ref) == inode->i_ino; | |
517 | } | |
518 | ||
519 | static int ntfs_set_inode(struct inode *inode, void *data) | |
520 | { | |
521 | const struct MFT_REF *ref = data; | |
522 | ||
523 | inode->i_ino = ino_get(ref); | |
524 | return 0; | |
525 | } | |
526 | ||
527 | struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref, | |
528 | const struct cpu_str *name) | |
529 | { | |
530 | struct inode *inode; | |
531 | ||
532 | inode = iget5_locked(sb, ino_get(ref), ntfs_test_inode, ntfs_set_inode, | |
533 | (void *)ref); | |
534 | if (unlikely(!inode)) | |
535 | return ERR_PTR(-ENOMEM); | |
536 | ||
537 | /* If this is a freshly allocated inode, need to read it now. */ | |
538 | if (inode->i_state & I_NEW) | |
539 | inode = ntfs_read_mft(inode, name, ref); | |
540 | else if (ref->seq != ntfs_i(inode)->mi.mrec->seq) { | |
e8b8e97f | 541 | /* Inode overlaps? */ |
c12df45e | 542 | _ntfs_bad_inode(inode); |
82cae269 KK |
543 | } |
544 | ||
0e8235d2 KK |
545 | if (IS_ERR(inode) && name) |
546 | ntfs_set_state(sb->s_fs_info, NTFS_DIRTY_ERROR); | |
547 | ||
82cae269 KK |
548 | return inode; |
549 | } | |
550 | ||
551 | enum get_block_ctx { | |
552 | GET_BLOCK_GENERAL = 0, | |
553 | GET_BLOCK_WRITE_BEGIN = 1, | |
554 | GET_BLOCK_DIRECT_IO_R = 2, | |
555 | GET_BLOCK_DIRECT_IO_W = 3, | |
556 | GET_BLOCK_BMAP = 4, | |
557 | }; | |
558 | ||
559 | static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo, | |
560 | struct buffer_head *bh, int create, | |
561 | enum get_block_ctx ctx) | |
562 | { | |
563 | struct super_block *sb = inode->i_sb; | |
564 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
565 | struct ntfs_inode *ni = ntfs_i(inode); | |
07811230 | 566 | struct folio *folio = bh->b_folio; |
82cae269 KK |
567 | u8 cluster_bits = sbi->cluster_bits; |
568 | u32 block_size = sb->s_blocksize; | |
569 | u64 bytes, lbo, valid; | |
570 | u32 off; | |
571 | int err; | |
572 | CLST vcn, lcn, len; | |
573 | bool new; | |
574 | ||
e8b8e97f | 575 | /* Clear previous state. */ |
82cae269 KK |
576 | clear_buffer_new(bh); |
577 | clear_buffer_uptodate(bh); | |
578 | ||
82cae269 | 579 | if (is_resident(ni)) { |
1cd6c962 | 580 | bh->b_blocknr = RESIDENT_LCN; |
82cae269 | 581 | bh->b_size = block_size; |
1cd6c962 KK |
582 | if (!folio) { |
583 | err = 0; | |
584 | } else { | |
585 | ni_lock(ni); | |
586 | err = attr_data_read_resident(ni, &folio->page); | |
587 | ni_unlock(ni); | |
588 | ||
589 | if (!err) | |
590 | set_buffer_uptodate(bh); | |
591 | } | |
82cae269 KK |
592 | return err; |
593 | } | |
594 | ||
595 | vcn = vbo >> cluster_bits; | |
596 | off = vbo & sbi->cluster_mask; | |
597 | new = false; | |
598 | ||
c380b52f KK |
599 | err = attr_data_get_block(ni, vcn, 1, &lcn, &len, create ? &new : NULL, |
600 | create && sbi->cluster_size > PAGE_SIZE); | |
82cae269 KK |
601 | if (err) |
602 | goto out; | |
603 | ||
604 | if (!len) | |
605 | return 0; | |
606 | ||
607 | bytes = ((u64)len << cluster_bits) - off; | |
608 | ||
609 | if (lcn == SPARSE_LCN) { | |
610 | if (!create) { | |
611 | if (bh->b_size > bytes) | |
612 | bh->b_size = bytes; | |
613 | return 0; | |
614 | } | |
615 | WARN_ON(1); | |
616 | } | |
617 | ||
c380b52f | 618 | if (new) |
82cae269 | 619 | set_buffer_new(bh); |
82cae269 KK |
620 | |
621 | lbo = ((u64)lcn << cluster_bits) + off; | |
622 | ||
623 | set_buffer_mapped(bh); | |
624 | bh->b_bdev = sb->s_bdev; | |
625 | bh->b_blocknr = lbo >> sb->s_blocksize_bits; | |
626 | ||
627 | valid = ni->i_valid; | |
628 | ||
629 | if (ctx == GET_BLOCK_DIRECT_IO_W) { | |
e8b8e97f | 630 | /* ntfs_direct_IO will update ni->i_valid. */ |
82cae269 KK |
631 | if (vbo >= valid) |
632 | set_buffer_new(bh); | |
633 | } else if (create) { | |
d3624466 | 634 | /* Normal write. */ |
82cae269 KK |
635 | if (bytes > bh->b_size) |
636 | bytes = bh->b_size; | |
637 | ||
638 | if (vbo >= valid) | |
639 | set_buffer_new(bh); | |
640 | ||
641 | if (vbo + bytes > valid) { | |
642 | ni->i_valid = vbo + bytes; | |
643 | mark_inode_dirty(inode); | |
644 | } | |
645 | } else if (vbo >= valid) { | |
e8b8e97f | 646 | /* Read out of valid data. */ |
82cae269 KK |
647 | clear_buffer_mapped(bh); |
648 | } else if (vbo + bytes <= valid) { | |
e8b8e97f | 649 | /* Normal read. */ |
82cae269 | 650 | } else if (vbo + block_size <= valid) { |
e8b8e97f | 651 | /* Normal short read. */ |
82cae269 KK |
652 | bytes = block_size; |
653 | } else { | |
654 | /* | |
e8b8e97f | 655 | * Read across valid size: vbo < valid && valid < vbo + block_size |
82cae269 KK |
656 | */ |
657 | bytes = block_size; | |
658 | ||
07811230 | 659 | if (folio) { |
82cae269 KK |
660 | u32 voff = valid - vbo; |
661 | ||
662 | bh->b_size = block_size; | |
663 | off = vbo & (PAGE_SIZE - 1); | |
07811230 | 664 | folio_set_bh(bh, folio, off); |
c20bc9c6 | 665 | |
a40b73f6 KK |
666 | if (bh_read(bh, 0) < 0) { |
667 | err = -EIO; | |
82cae269 | 668 | goto out; |
a40b73f6 | 669 | } |
07811230 | 670 | folio_zero_segment(folio, off + voff, off + block_size); |
82cae269 KK |
671 | } |
672 | } | |
673 | ||
674 | if (bh->b_size > bytes) | |
675 | bh->b_size = bytes; | |
676 | ||
677 | #ifndef __LP64__ | |
678 | if (ctx == GET_BLOCK_DIRECT_IO_W || ctx == GET_BLOCK_DIRECT_IO_R) { | |
679 | static_assert(sizeof(size_t) < sizeof(loff_t)); | |
680 | if (bytes > 0x40000000u) | |
681 | bh->b_size = 0x40000000u; | |
682 | } | |
683 | #endif | |
684 | ||
685 | return 0; | |
686 | ||
687 | out: | |
688 | return err; | |
689 | } | |
690 | ||
691 | int ntfs_get_block(struct inode *inode, sector_t vbn, | |
692 | struct buffer_head *bh_result, int create) | |
693 | { | |
694 | return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits, | |
695 | bh_result, create, GET_BLOCK_GENERAL); | |
696 | } | |
697 | ||
698 | static int ntfs_get_block_bmap(struct inode *inode, sector_t vsn, | |
699 | struct buffer_head *bh_result, int create) | |
700 | { | |
701 | return ntfs_get_block_vbo(inode, | |
702 | (u64)vsn << inode->i_sb->s_blocksize_bits, | |
703 | bh_result, create, GET_BLOCK_BMAP); | |
704 | } | |
705 | ||
706 | static sector_t ntfs_bmap(struct address_space *mapping, sector_t block) | |
707 | { | |
708 | return generic_block_bmap(mapping, block, ntfs_get_block_bmap); | |
709 | } | |
710 | ||
f132ab7d | 711 | static int ntfs_read_folio(struct file *file, struct folio *folio) |
82cae269 | 712 | { |
f132ab7d | 713 | struct page *page = &folio->page; |
82cae269 KK |
714 | int err; |
715 | struct address_space *mapping = page->mapping; | |
716 | struct inode *inode = mapping->host; | |
717 | struct ntfs_inode *ni = ntfs_i(inode); | |
718 | ||
719 | if (is_resident(ni)) { | |
720 | ni_lock(ni); | |
721 | err = attr_data_read_resident(ni, page); | |
722 | ni_unlock(ni); | |
723 | if (err != E_NTFS_NONRESIDENT) { | |
724 | unlock_page(page); | |
725 | return err; | |
726 | } | |
727 | } | |
728 | ||
729 | if (is_compressed(ni)) { | |
730 | ni_lock(ni); | |
731 | err = ni_readpage_cmpr(ni, page); | |
732 | ni_unlock(ni); | |
733 | return err; | |
734 | } | |
735 | ||
e8b8e97f | 736 | /* Normal + sparse files. */ |
f132ab7d | 737 | return mpage_read_folio(folio, ntfs_get_block); |
82cae269 KK |
738 | } |
739 | ||
740 | static void ntfs_readahead(struct readahead_control *rac) | |
741 | { | |
742 | struct address_space *mapping = rac->mapping; | |
743 | struct inode *inode = mapping->host; | |
744 | struct ntfs_inode *ni = ntfs_i(inode); | |
745 | u64 valid; | |
746 | loff_t pos; | |
747 | ||
748 | if (is_resident(ni)) { | |
e8b8e97f | 749 | /* No readahead for resident. */ |
82cae269 KK |
750 | return; |
751 | } | |
752 | ||
753 | if (is_compressed(ni)) { | |
e8b8e97f | 754 | /* No readahead for compressed. */ |
82cae269 KK |
755 | return; |
756 | } | |
757 | ||
758 | valid = ni->i_valid; | |
759 | pos = readahead_pos(rac); | |
760 | ||
761 | if (valid < i_size_read(inode) && pos <= valid && | |
762 | valid < pos + readahead_length(rac)) { | |
e8b8e97f | 763 | /* Range cross 'valid'. Read it page by page. */ |
82cae269 KK |
764 | return; |
765 | } | |
766 | ||
767 | mpage_readahead(rac, ntfs_get_block); | |
768 | } | |
769 | ||
770 | static int ntfs_get_block_direct_IO_R(struct inode *inode, sector_t iblock, | |
771 | struct buffer_head *bh_result, int create) | |
772 | { | |
773 | return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits, | |
774 | bh_result, create, GET_BLOCK_DIRECT_IO_R); | |
775 | } | |
776 | ||
777 | static int ntfs_get_block_direct_IO_W(struct inode *inode, sector_t iblock, | |
778 | struct buffer_head *bh_result, int create) | |
779 | { | |
780 | return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits, | |
781 | bh_result, create, GET_BLOCK_DIRECT_IO_W); | |
782 | } | |
783 | ||
784 | static ssize_t ntfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) | |
785 | { | |
786 | struct file *file = iocb->ki_filp; | |
787 | struct address_space *mapping = file->f_mapping; | |
788 | struct inode *inode = mapping->host; | |
789 | struct ntfs_inode *ni = ntfs_i(inode); | |
790 | loff_t vbo = iocb->ki_pos; | |
791 | loff_t end; | |
792 | int wr = iov_iter_rw(iter) & WRITE; | |
52e00ea6 | 793 | size_t iter_count = iov_iter_count(iter); |
82cae269 KK |
794 | loff_t valid; |
795 | ssize_t ret; | |
796 | ||
797 | if (is_resident(ni)) { | |
e8b8e97f | 798 | /* Switch to buffered write. */ |
82cae269 KK |
799 | ret = 0; |
800 | goto out; | |
801 | } | |
802 | ||
803 | ret = blockdev_direct_IO(iocb, inode, iter, | |
96de65a9 | 804 | wr ? ntfs_get_block_direct_IO_W : |
f0377761 | 805 | ntfs_get_block_direct_IO_R); |
82cae269 | 806 | |
52e00ea6 KK |
807 | if (ret > 0) |
808 | end = vbo + ret; | |
809 | else if (wr && ret == -EIOCBQUEUED) | |
810 | end = vbo + iter_count; | |
811 | else | |
82cae269 KK |
812 | goto out; |
813 | ||
82cae269 KK |
814 | valid = ni->i_valid; |
815 | if (wr) { | |
816 | if (end > valid && !S_ISBLK(inode->i_mode)) { | |
817 | ni->i_valid = end; | |
818 | mark_inode_dirty(inode); | |
819 | } | |
820 | } else if (vbo < valid && valid < end) { | |
e8b8e97f | 821 | /* Fix page. */ |
82cae269 KK |
822 | iov_iter_revert(iter, end - valid); |
823 | iov_iter_zero(end - valid, iter); | |
824 | } | |
825 | ||
826 | out: | |
827 | return ret; | |
828 | } | |
829 | ||
830 | int ntfs_set_size(struct inode *inode, u64 new_size) | |
831 | { | |
832 | struct super_block *sb = inode->i_sb; | |
833 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
834 | struct ntfs_inode *ni = ntfs_i(inode); | |
835 | int err; | |
836 | ||
e8b8e97f | 837 | /* Check for maximum file size. */ |
82cae269 KK |
838 | if (is_sparsed(ni) || is_compressed(ni)) { |
839 | if (new_size > sbi->maxbytes_sparse) { | |
840 | err = -EFBIG; | |
841 | goto out; | |
842 | } | |
843 | } else if (new_size > sbi->maxbytes) { | |
844 | err = -EFBIG; | |
845 | goto out; | |
846 | } | |
847 | ||
848 | ni_lock(ni); | |
849 | down_write(&ni->file.run_lock); | |
850 | ||
851 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size, | |
852 | &ni->i_valid, true, NULL); | |
853 | ||
854 | up_write(&ni->file.run_lock); | |
855 | ni_unlock(ni); | |
856 | ||
857 | mark_inode_dirty(inode); | |
858 | ||
859 | out: | |
860 | return err; | |
861 | } | |
862 | ||
d585bdbe | 863 | static int ntfs_resident_writepage(struct folio *folio, |
96de65a9 | 864 | struct writeback_control *wbc, void *data) |
82cae269 | 865 | { |
d4428bad | 866 | struct address_space *mapping = data; |
6c3684e7 KK |
867 | struct inode *inode = mapping->host; |
868 | struct ntfs_inode *ni = ntfs_i(inode); | |
d4428bad | 869 | int ret; |
82cae269 | 870 | |
6c3684e7 KK |
871 | if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
872 | return -EIO; | |
873 | ||
d4428bad | 874 | ni_lock(ni); |
d585bdbe | 875 | ret = attr_data_write_resident(ni, &folio->page); |
d4428bad | 876 | ni_unlock(ni); |
82cae269 | 877 | |
d4428bad | 878 | if (ret != E_NTFS_NONRESIDENT) |
d585bdbe | 879 | folio_unlock(folio); |
d4428bad CH |
880 | mapping_set_error(mapping, ret); |
881 | return ret; | |
82cae269 KK |
882 | } |
883 | ||
884 | static int ntfs_writepages(struct address_space *mapping, | |
885 | struct writeback_control *wbc) | |
886 | { | |
6c3684e7 KK |
887 | struct inode *inode = mapping->host; |
888 | ||
889 | if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) | |
890 | return -EIO; | |
891 | ||
892 | if (is_resident(ntfs_i(inode))) | |
d4428bad CH |
893 | return write_cache_pages(mapping, wbc, ntfs_resident_writepage, |
894 | mapping); | |
91397101 | 895 | return mpage_writepages(mapping, wbc, ntfs_get_block); |
82cae269 KK |
896 | } |
897 | ||
898 | static int ntfs_get_block_write_begin(struct inode *inode, sector_t vbn, | |
899 | struct buffer_head *bh_result, int create) | |
900 | { | |
901 | return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits, | |
902 | bh_result, create, GET_BLOCK_WRITE_BEGIN); | |
903 | } | |
904 | ||
44ab23b9 MWO |
905 | int ntfs_write_begin(struct file *file, struct address_space *mapping, |
906 | loff_t pos, u32 len, struct page **pagep, void **fsdata) | |
82cae269 KK |
907 | { |
908 | int err; | |
909 | struct inode *inode = mapping->host; | |
910 | struct ntfs_inode *ni = ntfs_i(inode); | |
911 | ||
6c3684e7 KK |
912 | if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
913 | return -EIO; | |
914 | ||
82cae269 KK |
915 | *pagep = NULL; |
916 | if (is_resident(ni)) { | |
96de65a9 KK |
917 | struct page *page = |
918 | grab_cache_page_write_begin(mapping, pos >> PAGE_SHIFT); | |
82cae269 KK |
919 | |
920 | if (!page) { | |
921 | err = -ENOMEM; | |
922 | goto out; | |
923 | } | |
924 | ||
925 | ni_lock(ni); | |
926 | err = attr_data_read_resident(ni, page); | |
927 | ni_unlock(ni); | |
928 | ||
929 | if (!err) { | |
930 | *pagep = page; | |
931 | goto out; | |
932 | } | |
933 | unlock_page(page); | |
934 | put_page(page); | |
935 | ||
936 | if (err != E_NTFS_NONRESIDENT) | |
937 | goto out; | |
938 | } | |
939 | ||
b3992d1e | 940 | err = block_write_begin(mapping, pos, len, pagep, |
82cae269 KK |
941 | ntfs_get_block_write_begin); |
942 | ||
943 | out: | |
944 | return err; | |
945 | } | |
946 | ||
e8b8e97f KA |
947 | /* |
948 | * ntfs_write_end - Address_space_operations::write_end. | |
949 | */ | |
96de65a9 KK |
950 | int ntfs_write_end(struct file *file, struct address_space *mapping, loff_t pos, |
951 | u32 len, u32 copied, struct page *page, void *fsdata) | |
82cae269 KK |
952 | { |
953 | struct inode *inode = mapping->host; | |
954 | struct ntfs_inode *ni = ntfs_i(inode); | |
955 | u64 valid = ni->i_valid; | |
956 | bool dirty = false; | |
957 | int err; | |
958 | ||
959 | if (is_resident(ni)) { | |
960 | ni_lock(ni); | |
961 | err = attr_data_write_resident(ni, page); | |
962 | ni_unlock(ni); | |
963 | if (!err) { | |
964 | dirty = true; | |
e8b8e97f | 965 | /* Clear any buffers in page. */ |
82cae269 KK |
966 | if (page_has_buffers(page)) { |
967 | struct buffer_head *head, *bh; | |
968 | ||
969 | bh = head = page_buffers(page); | |
970 | do { | |
971 | clear_buffer_dirty(bh); | |
972 | clear_buffer_mapped(bh); | |
973 | set_buffer_uptodate(bh); | |
974 | } while (head != (bh = bh->b_this_page)); | |
975 | } | |
976 | SetPageUptodate(page); | |
977 | err = copied; | |
978 | } | |
979 | unlock_page(page); | |
980 | put_page(page); | |
981 | } else { | |
982 | err = generic_write_end(file, mapping, pos, len, copied, page, | |
983 | fsdata); | |
984 | } | |
985 | ||
986 | if (err >= 0) { | |
987 | if (!(ni->std_fa & FILE_ATTRIBUTE_ARCHIVE)) { | |
2be861fa JL |
988 | inode_set_mtime_to_ts(inode, |
989 | inode_set_ctime_current(inode)); | |
82cae269 KK |
990 | ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE; |
991 | dirty = true; | |
992 | } | |
993 | ||
994 | if (valid != ni->i_valid) { | |
e8b8e97f | 995 | /* ni->i_valid is changed in ntfs_get_block_vbo. */ |
82cae269 KK |
996 | dirty = true; |
997 | } | |
998 | ||
ad26a9c8 | 999 | if (pos + err > inode->i_size) { |
4fd6c08a | 1000 | i_size_write(inode, pos + err); |
ad26a9c8 KK |
1001 | dirty = true; |
1002 | } | |
1003 | ||
82cae269 KK |
1004 | if (dirty) |
1005 | mark_inode_dirty(inode); | |
1006 | } | |
1007 | ||
1008 | return err; | |
1009 | } | |
1010 | ||
1011 | int reset_log_file(struct inode *inode) | |
1012 | { | |
1013 | int err; | |
1014 | loff_t pos = 0; | |
1015 | u32 log_size = inode->i_size; | |
1016 | struct address_space *mapping = inode->i_mapping; | |
1017 | ||
1018 | for (;;) { | |
1019 | u32 len; | |
1020 | void *kaddr; | |
1021 | struct page *page; | |
1022 | ||
1023 | len = pos + PAGE_SIZE > log_size ? (log_size - pos) : PAGE_SIZE; | |
1024 | ||
b3992d1e | 1025 | err = block_write_begin(mapping, pos, len, &page, |
82cae269 KK |
1026 | ntfs_get_block_write_begin); |
1027 | if (err) | |
1028 | goto out; | |
1029 | ||
1030 | kaddr = kmap_atomic(page); | |
1031 | memset(kaddr, -1, len); | |
1032 | kunmap_atomic(kaddr); | |
1033 | flush_dcache_page(page); | |
1034 | ||
1035 | err = block_write_end(NULL, mapping, pos, len, len, page, NULL); | |
1036 | if (err < 0) | |
1037 | goto out; | |
1038 | pos += len; | |
1039 | ||
1040 | if (pos >= log_size) | |
1041 | break; | |
1042 | balance_dirty_pages_ratelimited(mapping); | |
1043 | } | |
1044 | out: | |
1045 | mark_inode_dirty_sync(inode); | |
1046 | ||
1047 | return err; | |
1048 | } | |
1049 | ||
1050 | int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc) | |
1051 | { | |
1052 | return _ni_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL); | |
1053 | } | |
1054 | ||
1055 | int ntfs_sync_inode(struct inode *inode) | |
1056 | { | |
1057 | return _ni_write_inode(inode, 1); | |
1058 | } | |
1059 | ||
1060 | /* | |
e8b8e97f KA |
1061 | * writeback_inode - Helper function for ntfs_flush_inodes(). |
1062 | * | |
1063 | * This writes both the inode and the file data blocks, waiting | |
1064 | * for in flight data blocks before the start of the call. It | |
1065 | * does not wait for any io started during the call. | |
82cae269 KK |
1066 | */ |
1067 | static int writeback_inode(struct inode *inode) | |
1068 | { | |
1069 | int ret = sync_inode_metadata(inode, 0); | |
1070 | ||
1071 | if (!ret) | |
1072 | ret = filemap_fdatawrite(inode->i_mapping); | |
1073 | return ret; | |
1074 | } | |
1075 | ||
1076 | /* | |
e8b8e97f KA |
1077 | * ntfs_flush_inodes |
1078 | * | |
1079 | * Write data and metadata corresponding to i1 and i2. The io is | |
82cae269 KK |
1080 | * started but we do not wait for any of it to finish. |
1081 | * | |
e8b8e97f | 1082 | * filemap_flush() is used for the block device, so if there is a dirty |
82cae269 | 1083 | * page for a block already in flight, we will not wait and start the |
e8b8e97f | 1084 | * io over again. |
82cae269 KK |
1085 | */ |
1086 | int ntfs_flush_inodes(struct super_block *sb, struct inode *i1, | |
1087 | struct inode *i2) | |
1088 | { | |
1089 | int ret = 0; | |
1090 | ||
1091 | if (i1) | |
1092 | ret = writeback_inode(i1); | |
1093 | if (!ret && i2) | |
1094 | ret = writeback_inode(i2); | |
1095 | if (!ret) | |
680e667b | 1096 | ret = sync_blockdev_nowait(sb->s_bdev); |
82cae269 KK |
1097 | return ret; |
1098 | } | |
1099 | ||
1100 | int inode_write_data(struct inode *inode, const void *data, size_t bytes) | |
1101 | { | |
1102 | pgoff_t idx; | |
1103 | ||
e8b8e97f | 1104 | /* Write non resident data. */ |
82cae269 KK |
1105 | for (idx = 0; bytes; idx++) { |
1106 | size_t op = bytes > PAGE_SIZE ? PAGE_SIZE : bytes; | |
1107 | struct page *page = ntfs_map_page(inode->i_mapping, idx); | |
1108 | ||
1109 | if (IS_ERR(page)) | |
1110 | return PTR_ERR(page); | |
1111 | ||
1112 | lock_page(page); | |
1113 | WARN_ON(!PageUptodate(page)); | |
1114 | ClearPageUptodate(page); | |
1115 | ||
1116 | memcpy(page_address(page), data, op); | |
1117 | ||
1118 | flush_dcache_page(page); | |
1119 | SetPageUptodate(page); | |
1120 | unlock_page(page); | |
1121 | ||
1122 | ntfs_unmap_page(page); | |
1123 | ||
1124 | bytes -= op; | |
1125 | data = Add2Ptr(data, PAGE_SIZE); | |
1126 | } | |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | /* | |
e8b8e97f KA |
1131 | * ntfs_reparse_bytes |
1132 | * | |
d3624466 | 1133 | * Number of bytes for REPARSE_DATA_BUFFER(IO_REPARSE_TAG_SYMLINK) |
e8b8e97f | 1134 | * for unicode string of @uni_len length. |
82cae269 KK |
1135 | */ |
1136 | static inline u32 ntfs_reparse_bytes(u32 uni_len) | |
1137 | { | |
e8b8e97f | 1138 | /* Header + unicode string + decorated unicode string. */ |
82cae269 KK |
1139 | return sizeof(short) * (2 * uni_len + 4) + |
1140 | offsetof(struct REPARSE_DATA_BUFFER, | |
1141 | SymbolicLinkReparseBuffer.PathBuffer); | |
1142 | } | |
1143 | ||
1144 | static struct REPARSE_DATA_BUFFER * | |
1145 | ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname, | |
1146 | u32 size, u16 *nsize) | |
1147 | { | |
1148 | int i, err; | |
1149 | struct REPARSE_DATA_BUFFER *rp; | |
1150 | __le16 *rp_name; | |
1151 | typeof(rp->SymbolicLinkReparseBuffer) *rs; | |
1152 | ||
195c52bd | 1153 | rp = kzalloc(ntfs_reparse_bytes(2 * size + 2), GFP_NOFS); |
82cae269 KK |
1154 | if (!rp) |
1155 | return ERR_PTR(-ENOMEM); | |
1156 | ||
1157 | rs = &rp->SymbolicLinkReparseBuffer; | |
1158 | rp_name = rs->PathBuffer; | |
1159 | ||
e8b8e97f | 1160 | /* Convert link name to UTF-16. */ |
82cae269 KK |
1161 | err = ntfs_nls_to_utf16(sbi, symname, size, |
1162 | (struct cpu_str *)(rp_name - 1), 2 * size, | |
1163 | UTF16_LITTLE_ENDIAN); | |
1164 | if (err < 0) | |
1165 | goto out; | |
1166 | ||
e8b8e97f | 1167 | /* err = the length of unicode name of symlink. */ |
82cae269 KK |
1168 | *nsize = ntfs_reparse_bytes(err); |
1169 | ||
1170 | if (*nsize > sbi->reparse.max_size) { | |
1171 | err = -EFBIG; | |
1172 | goto out; | |
1173 | } | |
1174 | ||
e8b8e97f | 1175 | /* Translate Linux '/' into Windows '\'. */ |
82cae269 KK |
1176 | for (i = 0; i < err; i++) { |
1177 | if (rp_name[i] == cpu_to_le16('/')) | |
1178 | rp_name[i] = cpu_to_le16('\\'); | |
1179 | } | |
1180 | ||
1181 | rp->ReparseTag = IO_REPARSE_TAG_SYMLINK; | |
1182 | rp->ReparseDataLength = | |
1183 | cpu_to_le16(*nsize - offsetof(struct REPARSE_DATA_BUFFER, | |
1184 | SymbolicLinkReparseBuffer)); | |
1185 | ||
e8b8e97f | 1186 | /* PrintName + SubstituteName. */ |
82cae269 KK |
1187 | rs->SubstituteNameOffset = cpu_to_le16(sizeof(short) * err); |
1188 | rs->SubstituteNameLength = cpu_to_le16(sizeof(short) * err + 8); | |
1189 | rs->PrintNameLength = rs->SubstituteNameOffset; | |
1190 | ||
1191 | /* | |
e8b8e97f KA |
1192 | * TODO: Use relative path if possible to allow Windows to |
1193 | * parse this path. | |
1194 | * 0-absolute path 1- relative path (SYMLINK_FLAG_RELATIVE). | |
82cae269 KK |
1195 | */ |
1196 | rs->Flags = 0; | |
1197 | ||
1198 | memmove(rp_name + err + 4, rp_name, sizeof(short) * err); | |
1199 | ||
e8b8e97f | 1200 | /* Decorate SubstituteName. */ |
82cae269 KK |
1201 | rp_name += err; |
1202 | rp_name[0] = cpu_to_le16('\\'); | |
1203 | rp_name[1] = cpu_to_le16('?'); | |
1204 | rp_name[2] = cpu_to_le16('?'); | |
1205 | rp_name[3] = cpu_to_le16('\\'); | |
1206 | ||
1207 | return rp; | |
1208 | out: | |
195c52bd | 1209 | kfree(rp); |
82cae269 KK |
1210 | return ERR_PTR(err); |
1211 | } | |
1212 | ||
2b108260 KK |
1213 | /* |
1214 | * ntfs_create_inode | |
1215 | * | |
1216 | * Helper function for: | |
1217 | * - ntfs_create | |
1218 | * - ntfs_mknod | |
1219 | * - ntfs_symlink | |
1220 | * - ntfs_mkdir | |
1221 | * - ntfs_atomic_open | |
f0377761 | 1222 | * |
2b108260 KK |
1223 | * NOTE: if fnd != NULL (ntfs_atomic_open) then @dir is locked |
1224 | */ | |
c935c668 KK |
1225 | int ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir, |
1226 | struct dentry *dentry, const struct cpu_str *uni, | |
1227 | umode_t mode, dev_t dev, const char *symname, u32 size, | |
1228 | struct ntfs_fnd *fnd) | |
82cae269 KK |
1229 | { |
1230 | int err; | |
1231 | struct super_block *sb = dir->i_sb; | |
1232 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
1233 | const struct qstr *name = &dentry->d_name; | |
1234 | CLST ino = 0; | |
1235 | struct ntfs_inode *dir_ni = ntfs_i(dir); | |
1236 | struct ntfs_inode *ni = NULL; | |
1237 | struct inode *inode = NULL; | |
1238 | struct ATTRIB *attr; | |
1239 | struct ATTR_STD_INFO5 *std5; | |
1240 | struct ATTR_FILE_NAME *fname; | |
1241 | struct MFT_REC *rec; | |
1242 | u32 asize, dsize, sd_size; | |
1243 | enum FILE_ATTRIBUTE fa; | |
1244 | __le32 security_id = SECURITY_ID_INVALID; | |
1245 | CLST vcn; | |
1246 | const void *sd; | |
1247 | u16 t16, nsize = 0, aid = 0; | |
1248 | struct INDEX_ROOT *root, *dir_root; | |
1249 | struct NTFS_DE *e, *new_de = NULL; | |
1250 | struct REPARSE_DATA_BUFFER *rp = NULL; | |
1251 | bool rp_inserted = false; | |
1252 | ||
c935c668 KK |
1253 | /* New file will be resident or non resident. */ |
1254 | const bool new_file_resident = 1; | |
1255 | ||
2b108260 KK |
1256 | if (!fnd) |
1257 | ni_lock_dir(dir_ni); | |
d562e901 | 1258 | |
82cae269 | 1259 | dir_root = indx_get_root(&dir_ni->dir, dir_ni, NULL, NULL); |
d562e901 KK |
1260 | if (!dir_root) { |
1261 | err = -EINVAL; | |
1262 | goto out1; | |
1263 | } | |
82cae269 KK |
1264 | |
1265 | if (S_ISDIR(mode)) { | |
d3624466 | 1266 | /* Use parent's directory attributes. */ |
82cae269 KK |
1267 | fa = dir_ni->std_fa | FILE_ATTRIBUTE_DIRECTORY | |
1268 | FILE_ATTRIBUTE_ARCHIVE; | |
1269 | /* | |
d3624466 KK |
1270 | * By default child directory inherits parent attributes. |
1271 | * Root directory is hidden + system. | |
1272 | * Make an exception for children in root. | |
82cae269 KK |
1273 | */ |
1274 | if (dir->i_ino == MFT_REC_ROOT) | |
1275 | fa &= ~(FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM); | |
1276 | } else if (S_ISLNK(mode)) { | |
1277 | /* It is good idea that link should be the same type (file/dir) as target */ | |
1278 | fa = FILE_ATTRIBUTE_REPARSE_POINT; | |
1279 | ||
1280 | /* | |
d3624466 KK |
1281 | * Linux: there are dir/file/symlink and so on. |
1282 | * NTFS: symlinks are "dir + reparse" or "file + reparse" | |
82cae269 KK |
1283 | * It is good idea to create: |
1284 | * dir + reparse if 'symname' points to directory | |
1285 | * or | |
1286 | * file + reparse if 'symname' points to file | |
e8b8e97f | 1287 | * Unfortunately kern_path hangs if symname contains 'dir'. |
82cae269 KK |
1288 | */ |
1289 | ||
1290 | /* | |
1291 | * struct path path; | |
1292 | * | |
1293 | * if (!kern_path(symname, LOOKUP_FOLLOW, &path)){ | |
1294 | * struct inode *target = d_inode(path.dentry); | |
1295 | * | |
1296 | * if (S_ISDIR(target->i_mode)) | |
1297 | * fa |= FILE_ATTRIBUTE_DIRECTORY; | |
1298 | * // if ( target->i_sb == sb ){ | |
1299 | * // use relative path? | |
1300 | * // } | |
1301 | * path_put(&path); | |
1302 | * } | |
1303 | */ | |
1304 | } else if (S_ISREG(mode)) { | |
564c97bd | 1305 | if (sbi->options->sparse) { |
e8b8e97f | 1306 | /* Sparsed regular file, cause option 'sparse'. */ |
82cae269 KK |
1307 | fa = FILE_ATTRIBUTE_SPARSE_FILE | |
1308 | FILE_ATTRIBUTE_ARCHIVE; | |
1309 | } else if (dir_ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) { | |
e8b8e97f | 1310 | /* Compressed regular file, if parent is compressed. */ |
82cae269 KK |
1311 | fa = FILE_ATTRIBUTE_COMPRESSED | FILE_ATTRIBUTE_ARCHIVE; |
1312 | } else { | |
e8b8e97f | 1313 | /* Regular file, default attributes. */ |
82cae269 KK |
1314 | fa = FILE_ATTRIBUTE_ARCHIVE; |
1315 | } | |
1316 | } else { | |
1317 | fa = FILE_ATTRIBUTE_ARCHIVE; | |
1318 | } | |
1319 | ||
dc0fcc99 | 1320 | /* If option "hide_dot_files" then set hidden attribute for dot files. */ |
098250db KK |
1321 | if (sbi->options->hide_dot_files && name->name[0] == '.') |
1322 | fa |= FILE_ATTRIBUTE_HIDDEN; | |
1323 | ||
82cae269 KK |
1324 | if (!(mode & 0222)) |
1325 | fa |= FILE_ATTRIBUTE_READONLY; | |
1326 | ||
e8b8e97f | 1327 | /* Allocate PATH_MAX bytes. */ |
82cae269 KK |
1328 | new_de = __getname(); |
1329 | if (!new_de) { | |
1330 | err = -ENOMEM; | |
1331 | goto out1; | |
1332 | } | |
1333 | ||
6c3684e7 KK |
1334 | if (unlikely(ntfs3_forced_shutdown(sb))) { |
1335 | err = -EIO; | |
1336 | goto out2; | |
1337 | } | |
1338 | ||
e8b8e97f | 1339 | /* Mark rw ntfs as dirty. it will be cleared at umount. */ |
82cae269 KK |
1340 | ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); |
1341 | ||
e8b8e97f | 1342 | /* Step 1: allocate and fill new mft record. */ |
82cae269 KK |
1343 | err = ntfs_look_free_mft(sbi, &ino, false, NULL, NULL); |
1344 | if (err) | |
1345 | goto out2; | |
1346 | ||
a81f47c4 | 1347 | ni = ntfs_new_inode(sbi, ino, S_ISDIR(mode) ? RECORD_FLAG_DIR : 0); |
82cae269 KK |
1348 | if (IS_ERR(ni)) { |
1349 | err = PTR_ERR(ni); | |
1350 | ni = NULL; | |
1351 | goto out3; | |
1352 | } | |
1353 | inode = &ni->vfs_inode; | |
f2d40141 | 1354 | inode_init_owner(idmap, inode, dir, mode); |
78ab59fe | 1355 | mode = inode->i_mode; |
82cae269 | 1356 | |
1842fbc8 | 1357 | ni->i_crtime = current_time(inode); |
82cae269 KK |
1358 | |
1359 | rec = ni->mi.mrec; | |
1360 | rec->hard_links = cpu_to_le16(1); | |
1361 | attr = Add2Ptr(rec, le16_to_cpu(rec->attr_off)); | |
1362 | ||
e8b8e97f | 1363 | /* Get default security id. */ |
82cae269 KK |
1364 | sd = s_default_security; |
1365 | sd_size = sizeof(s_default_security); | |
1366 | ||
1367 | if (is_ntfs3(sbi)) { | |
1368 | security_id = dir_ni->std_security_id; | |
1369 | if (le32_to_cpu(security_id) < SECURITY_ID_FIRST) { | |
1370 | security_id = sbi->security.def_security_id; | |
1371 | ||
1372 | if (security_id == SECURITY_ID_INVALID && | |
1373 | !ntfs_insert_security(sbi, sd, sd_size, | |
1374 | &security_id, NULL)) | |
1375 | sbi->security.def_security_id = security_id; | |
1376 | } | |
1377 | } | |
1378 | ||
e8b8e97f | 1379 | /* Insert standard info. */ |
82cae269 KK |
1380 | std5 = Add2Ptr(attr, SIZEOF_RESIDENT); |
1381 | ||
1382 | if (security_id == SECURITY_ID_INVALID) { | |
1383 | dsize = sizeof(struct ATTR_STD_INFO); | |
1384 | } else { | |
1385 | dsize = sizeof(struct ATTR_STD_INFO5); | |
1386 | std5->security_id = security_id; | |
1387 | ni->std_security_id = security_id; | |
1388 | } | |
1389 | asize = SIZEOF_RESIDENT + dsize; | |
1390 | ||
1391 | attr->type = ATTR_STD; | |
1392 | attr->size = cpu_to_le32(asize); | |
1393 | attr->id = cpu_to_le16(aid++); | |
1394 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1395 | attr->res.data_size = cpu_to_le32(dsize); | |
1396 | ||
1397 | std5->cr_time = std5->m_time = std5->c_time = std5->a_time = | |
1842fbc8 | 1398 | kernel2nt(&ni->i_crtime); |
82cae269 | 1399 | |
1842fbc8 | 1400 | std5->fa = ni->std_fa = fa; |
82cae269 KK |
1401 | |
1402 | attr = Add2Ptr(attr, asize); | |
1403 | ||
e8b8e97f | 1404 | /* Insert file name. */ |
82cae269 KK |
1405 | err = fill_name_de(sbi, new_de, name, uni); |
1406 | if (err) | |
1407 | goto out4; | |
1408 | ||
1409 | mi_get_ref(&ni->mi, &new_de->ref); | |
1410 | ||
1411 | fname = (struct ATTR_FILE_NAME *)(new_de + 1); | |
1d07a9df DP |
1412 | |
1413 | if (sbi->options->windows_names && | |
1414 | !valid_windows_name(sbi, (struct le_str *)&fname->name_len)) { | |
1415 | err = -EINVAL; | |
1416 | goto out4; | |
1417 | } | |
1418 | ||
82cae269 KK |
1419 | mi_get_ref(&dir_ni->mi, &fname->home); |
1420 | fname->dup.cr_time = fname->dup.m_time = fname->dup.c_time = | |
1421 | fname->dup.a_time = std5->cr_time; | |
1422 | fname->dup.alloc_size = fname->dup.data_size = 0; | |
1423 | fname->dup.fa = std5->fa; | |
1424 | fname->dup.ea_size = fname->dup.reparse = 0; | |
1425 | ||
1426 | dsize = le16_to_cpu(new_de->key_size); | |
fa3cacf5 | 1427 | asize = ALIGN(SIZEOF_RESIDENT + dsize, 8); |
82cae269 KK |
1428 | |
1429 | attr->type = ATTR_NAME; | |
1430 | attr->size = cpu_to_le32(asize); | |
1431 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1432 | attr->res.flags = RESIDENT_FLAG_INDEXED; | |
1433 | attr->id = cpu_to_le16(aid++); | |
1434 | attr->res.data_size = cpu_to_le32(dsize); | |
1435 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), fname, dsize); | |
1436 | ||
1437 | attr = Add2Ptr(attr, asize); | |
1438 | ||
1439 | if (security_id == SECURITY_ID_INVALID) { | |
e8b8e97f | 1440 | /* Insert security attribute. */ |
fa3cacf5 | 1441 | asize = SIZEOF_RESIDENT + ALIGN(sd_size, 8); |
82cae269 KK |
1442 | |
1443 | attr->type = ATTR_SECURE; | |
1444 | attr->size = cpu_to_le32(asize); | |
1445 | attr->id = cpu_to_le16(aid++); | |
1446 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1447 | attr->res.data_size = cpu_to_le32(sd_size); | |
1448 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), sd, sd_size); | |
1449 | ||
1450 | attr = Add2Ptr(attr, asize); | |
1451 | } | |
1452 | ||
78ab59fe | 1453 | attr->id = cpu_to_le16(aid++); |
82cae269 KK |
1454 | if (fa & FILE_ATTRIBUTE_DIRECTORY) { |
1455 | /* | |
e8b8e97f KA |
1456 | * Regular directory or symlink to directory. |
1457 | * Create root attribute. | |
82cae269 KK |
1458 | */ |
1459 | dsize = sizeof(struct INDEX_ROOT) + sizeof(struct NTFS_DE); | |
1460 | asize = sizeof(I30_NAME) + SIZEOF_RESIDENT + dsize; | |
1461 | ||
1462 | attr->type = ATTR_ROOT; | |
1463 | attr->size = cpu_to_le32(asize); | |
82cae269 KK |
1464 | |
1465 | attr->name_len = ARRAY_SIZE(I30_NAME); | |
1466 | attr->name_off = SIZEOF_RESIDENT_LE; | |
1467 | attr->res.data_off = | |
1468 | cpu_to_le16(sizeof(I30_NAME) + SIZEOF_RESIDENT); | |
1469 | attr->res.data_size = cpu_to_le32(dsize); | |
1470 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), I30_NAME, | |
1471 | sizeof(I30_NAME)); | |
1472 | ||
1473 | root = Add2Ptr(attr, sizeof(I30_NAME) + SIZEOF_RESIDENT); | |
1474 | memcpy(root, dir_root, offsetof(struct INDEX_ROOT, ihdr)); | |
a81f47c4 | 1475 | root->ihdr.de_off = cpu_to_le32(sizeof(struct INDEX_HDR)); |
82cae269 KK |
1476 | root->ihdr.used = cpu_to_le32(sizeof(struct INDEX_HDR) + |
1477 | sizeof(struct NTFS_DE)); | |
1478 | root->ihdr.total = root->ihdr.used; | |
1479 | ||
1480 | e = Add2Ptr(root, sizeof(struct INDEX_ROOT)); | |
1481 | e->size = cpu_to_le16(sizeof(struct NTFS_DE)); | |
1482 | e->flags = NTFS_IE_LAST; | |
1483 | } else if (S_ISLNK(mode)) { | |
1484 | /* | |
e8b8e97f KA |
1485 | * Symlink to file. |
1486 | * Create empty resident data attribute. | |
82cae269 KK |
1487 | */ |
1488 | asize = SIZEOF_RESIDENT; | |
1489 | ||
e8b8e97f | 1490 | /* Insert empty ATTR_DATA */ |
82cae269 KK |
1491 | attr->type = ATTR_DATA; |
1492 | attr->size = cpu_to_le32(SIZEOF_RESIDENT); | |
82cae269 KK |
1493 | attr->name_off = SIZEOF_RESIDENT_LE; |
1494 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
c935c668 | 1495 | } else if (!new_file_resident && S_ISREG(mode)) { |
82cae269 | 1496 | /* |
78ab59fe | 1497 | * Regular file. Create empty non resident data attribute. |
82cae269 KK |
1498 | */ |
1499 | attr->type = ATTR_DATA; | |
78ab59fe KK |
1500 | attr->non_res = 1; |
1501 | attr->nres.evcn = cpu_to_le64(-1ll); | |
1502 | if (fa & FILE_ATTRIBUTE_SPARSE_FILE) { | |
1503 | attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8); | |
1504 | attr->name_off = SIZEOF_NONRESIDENT_EX_LE; | |
1505 | attr->flags = ATTR_FLAG_SPARSED; | |
1506 | asize = SIZEOF_NONRESIDENT_EX + 8; | |
1507 | } else if (fa & FILE_ATTRIBUTE_COMPRESSED) { | |
1508 | attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8); | |
1509 | attr->name_off = SIZEOF_NONRESIDENT_EX_LE; | |
1510 | attr->flags = ATTR_FLAG_COMPRESSED; | |
1511 | attr->nres.c_unit = COMPRESSION_UNIT; | |
1512 | asize = SIZEOF_NONRESIDENT_EX + 8; | |
82cae269 | 1513 | } else { |
78ab59fe KK |
1514 | attr->size = cpu_to_le32(SIZEOF_NONRESIDENT + 8); |
1515 | attr->name_off = SIZEOF_NONRESIDENT_LE; | |
1516 | asize = SIZEOF_NONRESIDENT + 8; | |
82cae269 | 1517 | } |
78ab59fe KK |
1518 | attr->nres.run_off = attr->name_off; |
1519 | } else { | |
1520 | /* | |
1521 | * Node. Create empty resident data attribute. | |
1522 | */ | |
1523 | attr->type = ATTR_DATA; | |
1524 | attr->size = cpu_to_le32(SIZEOF_RESIDENT); | |
1525 | attr->name_off = SIZEOF_RESIDENT_LE; | |
1526 | if (fa & FILE_ATTRIBUTE_SPARSE_FILE) | |
1527 | attr->flags = ATTR_FLAG_SPARSED; | |
1528 | else if (fa & FILE_ATTRIBUTE_COMPRESSED) | |
1529 | attr->flags = ATTR_FLAG_COMPRESSED; | |
1530 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1531 | asize = SIZEOF_RESIDENT; | |
1532 | ni->ni_flags |= NI_FLAG_RESIDENT; | |
82cae269 KK |
1533 | } |
1534 | ||
1535 | if (S_ISDIR(mode)) { | |
1536 | ni->ni_flags |= NI_FLAG_DIR; | |
1537 | err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30); | |
1538 | if (err) | |
1539 | goto out4; | |
1540 | } else if (S_ISLNK(mode)) { | |
1541 | rp = ntfs_create_reparse_buffer(sbi, symname, size, &nsize); | |
1542 | ||
1543 | if (IS_ERR(rp)) { | |
1544 | err = PTR_ERR(rp); | |
1545 | rp = NULL; | |
1546 | goto out4; | |
1547 | } | |
1548 | ||
1549 | /* | |
e8b8e97f | 1550 | * Insert ATTR_REPARSE. |
82cae269 KK |
1551 | */ |
1552 | attr = Add2Ptr(attr, asize); | |
1553 | attr->type = ATTR_REPARSE; | |
1554 | attr->id = cpu_to_le16(aid++); | |
1555 | ||
e8b8e97f | 1556 | /* Resident or non resident? */ |
fa3cacf5 | 1557 | asize = ALIGN(SIZEOF_RESIDENT + nsize, 8); |
82cae269 KK |
1558 | t16 = PtrOffset(rec, attr); |
1559 | ||
14a98119 KK |
1560 | /* |
1561 | * Below function 'ntfs_save_wsl_perm' requires 0x78 bytes. | |
1562 | * It is good idea to keep extened attributes resident. | |
1563 | */ | |
78ab59fe | 1564 | if (asize + t16 + 0x78 + 8 > sbi->record_size) { |
82cae269 KK |
1565 | CLST alen; |
1566 | CLST clst = bytes_to_cluster(sbi, nsize); | |
1567 | ||
e8b8e97f | 1568 | /* Bytes per runs. */ |
82cae269 KK |
1569 | t16 = sbi->record_size - t16 - SIZEOF_NONRESIDENT; |
1570 | ||
1571 | attr->non_res = 1; | |
1572 | attr->nres.evcn = cpu_to_le64(clst - 1); | |
1573 | attr->name_off = SIZEOF_NONRESIDENT_LE; | |
1574 | attr->nres.run_off = attr->name_off; | |
1575 | attr->nres.data_size = cpu_to_le64(nsize); | |
1576 | attr->nres.valid_size = attr->nres.data_size; | |
1577 | attr->nres.alloc_size = | |
1578 | cpu_to_le64(ntfs_up_cluster(sbi, nsize)); | |
1579 | ||
1580 | err = attr_allocate_clusters(sbi, &ni->file.run, 0, 0, | |
c380b52f KK |
1581 | clst, NULL, ALLOCATE_DEF, |
1582 | &alen, 0, NULL, NULL); | |
82cae269 KK |
1583 | if (err) |
1584 | goto out5; | |
1585 | ||
1586 | err = run_pack(&ni->file.run, 0, clst, | |
1587 | Add2Ptr(attr, SIZEOF_NONRESIDENT), t16, | |
1588 | &vcn); | |
1589 | if (err < 0) | |
1590 | goto out5; | |
1591 | ||
1592 | if (vcn != clst) { | |
1593 | err = -EINVAL; | |
1594 | goto out5; | |
1595 | } | |
1596 | ||
fa3cacf5 | 1597 | asize = SIZEOF_NONRESIDENT + ALIGN(err, 8); |
1842fbc8 KK |
1598 | /* Write non resident data. */ |
1599 | err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rp, | |
1600 | nsize, 0); | |
1601 | if (err) | |
1602 | goto out5; | |
82cae269 KK |
1603 | } else { |
1604 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1605 | attr->res.data_size = cpu_to_le32(nsize); | |
1606 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), rp, nsize); | |
82cae269 | 1607 | } |
14a98119 KK |
1608 | /* Size of symlink equals the length of input string. */ |
1609 | inode->i_size = size; | |
82cae269 KK |
1610 | |
1611 | attr->size = cpu_to_le32(asize); | |
1612 | ||
1613 | err = ntfs_insert_reparse(sbi, IO_REPARSE_TAG_SYMLINK, | |
1614 | &new_de->ref); | |
1615 | if (err) | |
1616 | goto out5; | |
1617 | ||
1618 | rp_inserted = true; | |
1619 | } | |
1620 | ||
1621 | attr = Add2Ptr(attr, asize); | |
1622 | attr->type = ATTR_END; | |
1623 | ||
1624 | rec->used = cpu_to_le32(PtrOffset(rec, attr) + 8); | |
1625 | rec->next_attr_id = cpu_to_le16(aid); | |
1626 | ||
82cae269 KK |
1627 | inode->i_generation = le16_to_cpu(rec->seq); |
1628 | ||
82cae269 | 1629 | if (S_ISDIR(mode)) { |
82cae269 | 1630 | inode->i_op = &ntfs_dir_inode_operations; |
9b872cc5 CB |
1631 | if (is_legacy_ntfs(inode->i_sb)) |
1632 | inode->i_fop = &ntfs_legacy_dir_operations; | |
1633 | else | |
1634 | inode->i_fop = &ntfs_dir_operations; | |
82cae269 KK |
1635 | } else if (S_ISLNK(mode)) { |
1636 | inode->i_op = &ntfs_link_inode_operations; | |
1637 | inode->i_fop = NULL; | |
1638 | inode->i_mapping->a_ops = &ntfs_aops; | |
14a98119 KK |
1639 | inode->i_size = size; |
1640 | inode_nohighmem(inode); | |
82cae269 KK |
1641 | } else if (S_ISREG(mode)) { |
1642 | inode->i_op = &ntfs_file_inode_operations; | |
9b872cc5 CB |
1643 | if (is_legacy_ntfs(inode->i_sb)) |
1644 | inode->i_fop = &ntfs_legacy_file_operations; | |
1645 | else | |
1646 | inode->i_fop = &ntfs_file_operations; | |
96de65a9 | 1647 | inode->i_mapping->a_ops = is_compressed(ni) ? &ntfs_aops_cmpr : |
f0377761 | 1648 | &ntfs_aops; |
82cae269 KK |
1649 | init_rwsem(&ni->file.run_lock); |
1650 | } else { | |
1651 | inode->i_op = &ntfs_special_inode_operations; | |
1652 | init_special_inode(inode, mode, dev); | |
1653 | } | |
1654 | ||
1655 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL | |
1656 | if (!S_ISLNK(mode) && (sb->s_flags & SB_POSIXACL)) { | |
700b7940 | 1657 | err = ntfs_init_acl(idmap, inode, dir); |
82cae269 | 1658 | if (err) |
1842fbc8 | 1659 | goto out5; |
82cae269 KK |
1660 | } else |
1661 | #endif | |
1662 | { | |
1663 | inode->i_flags |= S_NOSEC; | |
1664 | } | |
1665 | ||
1842fbc8 KK |
1666 | /* |
1667 | * ntfs_init_acl and ntfs_save_wsl_perm update extended attribute. | |
1668 | * The packed size of extended attribute is stored in direntry too. | |
1669 | * 'fname' here points to inside new_de. | |
1670 | */ | |
1671 | ntfs_save_wsl_perm(inode, &fname->dup.ea_size); | |
1672 | ||
1673 | /* | |
1674 | * update ea_size in file_name attribute too. | |
1675 | * Use ni_find_attr cause layout of MFT record may be changed | |
1676 | * in ntfs_init_acl and ntfs_save_wsl_perm. | |
1677 | */ | |
1678 | attr = ni_find_attr(ni, NULL, NULL, ATTR_NAME, NULL, 0, NULL, NULL); | |
1679 | if (attr) { | |
1680 | struct ATTR_FILE_NAME *fn; | |
1681 | ||
1682 | fn = resident_data_ex(attr, SIZEOF_ATTRIBUTE_FILENAME); | |
1683 | if (fn) | |
1684 | fn->dup.ea_size = fname->dup.ea_size; | |
82cae269 KK |
1685 | } |
1686 | ||
1842fbc8 KK |
1687 | /* We do not need to update parent directory later */ |
1688 | ni->ni_flags &= ~NI_FLAG_UPDATE_PARENT; | |
1689 | ||
1690 | /* Step 2: Add new name in index. */ | |
1691 | err = indx_insert_entry(&dir_ni->dir, dir_ni, new_de, sbi, fnd, 0); | |
1692 | if (err) | |
1693 | goto out6; | |
1694 | ||
e8b8e97f KA |
1695 | /* |
1696 | * Call 'd_instantiate' after inode->i_op is set | |
1697 | * but before finish_open. | |
1698 | */ | |
82cae269 KK |
1699 | d_instantiate(dentry, inode); |
1700 | ||
1842fbc8 | 1701 | /* Set original time. inode times (i_ctime) may be changed in ntfs_init_acl. */ |
2be861fa JL |
1702 | inode_set_atime_to_ts(inode, ni->i_crtime); |
1703 | inode_set_ctime_to_ts(inode, ni->i_crtime); | |
1704 | inode_set_mtime_to_ts(inode, ni->i_crtime); | |
1705 | inode_set_mtime_to_ts(dir, ni->i_crtime); | |
1706 | inode_set_ctime_to_ts(dir, ni->i_crtime); | |
1842fbc8 | 1707 | |
82cae269 | 1708 | mark_inode_dirty(dir); |
78ab59fe | 1709 | mark_inode_dirty(inode); |
82cae269 | 1710 | |
e8b8e97f | 1711 | /* Normal exit. */ |
82cae269 KK |
1712 | goto out2; |
1713 | ||
82cae269 KK |
1714 | out6: |
1715 | if (rp_inserted) | |
1716 | ntfs_remove_reparse(sbi, IO_REPARSE_TAG_SYMLINK, &new_de->ref); | |
1717 | ||
1718 | out5: | |
0e8235d2 KK |
1719 | if (!S_ISDIR(mode)) |
1720 | run_deallocate(sbi, &ni->file.run, false); | |
82cae269 KK |
1721 | |
1722 | out4: | |
1723 | clear_rec_inuse(rec); | |
1724 | clear_nlink(inode); | |
1725 | ni->mi.dirty = false; | |
1726 | discard_new_inode(inode); | |
1727 | out3: | |
071100ea | 1728 | ntfs_mark_rec_free(sbi, ino, false); |
82cae269 KK |
1729 | |
1730 | out2: | |
1731 | __putname(new_de); | |
195c52bd | 1732 | kfree(rp); |
82cae269 KK |
1733 | |
1734 | out1: | |
1842fbc8 KK |
1735 | if (!fnd) |
1736 | ni_unlock(dir_ni); | |
1737 | ||
c935c668 KK |
1738 | if (!err) |
1739 | unlock_new_inode(inode); | |
82cae269 | 1740 | |
c935c668 | 1741 | return err; |
82cae269 KK |
1742 | } |
1743 | ||
1744 | int ntfs_link_inode(struct inode *inode, struct dentry *dentry) | |
1745 | { | |
1746 | int err; | |
82cae269 | 1747 | struct ntfs_inode *ni = ntfs_i(inode); |
78ab59fe KK |
1748 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; |
1749 | struct NTFS_DE *de; | |
82cae269 | 1750 | |
e8b8e97f | 1751 | /* Allocate PATH_MAX bytes. */ |
78ab59fe KK |
1752 | de = __getname(); |
1753 | if (!de) | |
82cae269 KK |
1754 | return -ENOMEM; |
1755 | ||
78ab59fe KK |
1756 | /* Mark rw ntfs as dirty. It will be cleared at umount. */ |
1757 | ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); | |
82cae269 | 1758 | |
78ab59fe KK |
1759 | /* Construct 'de'. */ |
1760 | err = fill_name_de(sbi, de, &dentry->d_name, NULL); | |
82cae269 KK |
1761 | if (err) |
1762 | goto out; | |
1763 | ||
78ab59fe | 1764 | err = ni_add_name(ntfs_i(d_inode(dentry->d_parent)), ni, de); |
82cae269 | 1765 | out: |
78ab59fe | 1766 | __putname(de); |
82cae269 KK |
1767 | return err; |
1768 | } | |
1769 | ||
1770 | /* | |
1771 | * ntfs_unlink_inode | |
1772 | * | |
1773 | * inode_operations::unlink | |
1774 | * inode_operations::rmdir | |
1775 | */ | |
1776 | int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry) | |
1777 | { | |
1778 | int err; | |
78ab59fe | 1779 | struct ntfs_sb_info *sbi = dir->i_sb->s_fs_info; |
82cae269 KK |
1780 | struct inode *inode = d_inode(dentry); |
1781 | struct ntfs_inode *ni = ntfs_i(inode); | |
82cae269 | 1782 | struct ntfs_inode *dir_ni = ntfs_i(dir); |
78ab59fe KK |
1783 | struct NTFS_DE *de, *de2 = NULL; |
1784 | int undo_remove; | |
82cae269 | 1785 | |
78ab59fe | 1786 | if (ntfs_is_meta_file(sbi, ni->mi.rno)) |
82cae269 KK |
1787 | return -EINVAL; |
1788 | ||
78ab59fe KK |
1789 | /* Allocate PATH_MAX bytes. */ |
1790 | de = __getname(); | |
1791 | if (!de) | |
1792 | return -ENOMEM; | |
1793 | ||
82cae269 KK |
1794 | ni_lock(ni); |
1795 | ||
78ab59fe | 1796 | if (S_ISDIR(inode->i_mode) && !dir_is_empty(inode)) { |
82cae269 | 1797 | err = -ENOTEMPTY; |
78ab59fe | 1798 | goto out; |
82cae269 KK |
1799 | } |
1800 | ||
78ab59fe | 1801 | err = fill_name_de(sbi, de, &dentry->d_name, NULL); |
82cae269 | 1802 | if (err < 0) |
78ab59fe | 1803 | goto out; |
82cae269 | 1804 | |
78ab59fe KK |
1805 | undo_remove = 0; |
1806 | err = ni_remove_name(dir_ni, ni, de, &de2, &undo_remove); | |
82cae269 | 1807 | |
78ab59fe | 1808 | if (!err) { |
82cae269 | 1809 | drop_nlink(inode); |
2be861fa | 1810 | inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); |
78ab59fe | 1811 | mark_inode_dirty(dir); |
3d65c46f | 1812 | inode_set_ctime_to_ts(inode, inode_get_ctime(dir)); |
78ab59fe KK |
1813 | if (inode->i_nlink) |
1814 | mark_inode_dirty(inode); | |
1815 | } else if (!ni_remove_name_undo(dir_ni, ni, de, de2, undo_remove)) { | |
c12df45e | 1816 | _ntfs_bad_inode(inode); |
78ab59fe KK |
1817 | } else { |
1818 | if (ni_is_dirty(dir)) | |
1819 | mark_inode_dirty(dir); | |
1820 | if (ni_is_dirty(inode)) | |
1821 | mark_inode_dirty(inode); | |
82cae269 KK |
1822 | } |
1823 | ||
78ab59fe | 1824 | out: |
82cae269 | 1825 | ni_unlock(ni); |
78ab59fe | 1826 | __putname(de); |
82cae269 KK |
1827 | return err; |
1828 | } | |
1829 | ||
1830 | void ntfs_evict_inode(struct inode *inode) | |
1831 | { | |
1832 | truncate_inode_pages_final(&inode->i_data); | |
1833 | ||
82cae269 KK |
1834 | invalidate_inode_buffers(inode); |
1835 | clear_inode(inode); | |
1836 | ||
1837 | ni_clear(ntfs_i(inode)); | |
1838 | } | |
1839 | ||
0a4e7ce6 DP |
1840 | /* |
1841 | * ntfs_translate_junction | |
1842 | * | |
1843 | * Translate a Windows junction target to the Linux equivalent. | |
1844 | * On junctions, targets are always absolute (they include the drive | |
1845 | * letter). We have no way of knowing if the target is for the current | |
1846 | * mounted device or not so we just assume it is. | |
1847 | */ | |
1848 | static int ntfs_translate_junction(const struct super_block *sb, | |
1849 | const struct dentry *link_de, char *target, | |
1850 | int target_len, int target_max) | |
1851 | { | |
1852 | int tl_len, err = target_len; | |
1853 | char *link_path_buffer = NULL, *link_path; | |
1854 | char *translated = NULL; | |
1855 | char *target_start; | |
1856 | int copy_len; | |
1857 | ||
1858 | link_path_buffer = kmalloc(PATH_MAX, GFP_NOFS); | |
1859 | if (!link_path_buffer) { | |
1860 | err = -ENOMEM; | |
1861 | goto out; | |
1862 | } | |
1863 | /* Get link path, relative to mount point */ | |
1864 | link_path = dentry_path_raw(link_de, link_path_buffer, PATH_MAX); | |
1865 | if (IS_ERR(link_path)) { | |
1866 | ntfs_err(sb, "Error getting link path"); | |
1867 | err = -EINVAL; | |
1868 | goto out; | |
1869 | } | |
1870 | ||
1871 | translated = kmalloc(PATH_MAX, GFP_NOFS); | |
1872 | if (!translated) { | |
1873 | err = -ENOMEM; | |
1874 | goto out; | |
1875 | } | |
1876 | ||
1877 | /* Make translated path a relative path to mount point */ | |
1878 | strcpy(translated, "./"); | |
07f4aa9d | 1879 | ++link_path; /* Skip leading / */ |
0a4e7ce6 DP |
1880 | for (tl_len = sizeof("./") - 1; *link_path; ++link_path) { |
1881 | if (*link_path == '/') { | |
1882 | if (PATH_MAX - tl_len < sizeof("../")) { | |
07f4aa9d KK |
1883 | ntfs_err(sb, |
1884 | "Link path %s has too many components", | |
0a4e7ce6 DP |
1885 | link_path); |
1886 | err = -EINVAL; | |
1887 | goto out; | |
1888 | } | |
1889 | strcpy(translated + tl_len, "../"); | |
1890 | tl_len += sizeof("../") - 1; | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | /* Skip drive letter */ | |
1895 | target_start = target; | |
1896 | while (*target_start && *target_start != ':') | |
1897 | ++target_start; | |
1898 | ||
1899 | if (!*target_start) { | |
07f4aa9d KK |
1900 | ntfs_err(sb, "Link target (%s) missing drive separator", |
1901 | target); | |
0a4e7ce6 DP |
1902 | err = -EINVAL; |
1903 | goto out; | |
1904 | } | |
1905 | ||
1906 | /* Skip drive separator and leading /, if exists */ | |
1907 | target_start += 1 + (target_start[1] == '/'); | |
1908 | copy_len = target_len - (target_start - target); | |
1909 | ||
1910 | if (PATH_MAX - tl_len <= copy_len) { | |
1911 | ntfs_err(sb, "Link target %s too large for buffer (%d <= %d)", | |
1912 | target_start, PATH_MAX - tl_len, copy_len); | |
1913 | err = -EINVAL; | |
1914 | goto out; | |
1915 | } | |
1916 | ||
1917 | /* translated path has a trailing / and target_start does not */ | |
1918 | strcpy(translated + tl_len, target_start); | |
1919 | tl_len += copy_len; | |
1920 | if (target_max <= tl_len) { | |
1921 | ntfs_err(sb, "Target path %s too large for buffer (%d <= %d)", | |
1922 | translated, target_max, tl_len); | |
1923 | err = -EINVAL; | |
1924 | goto out; | |
1925 | } | |
1926 | strcpy(target, translated); | |
1927 | err = tl_len; | |
1928 | ||
1929 | out: | |
1930 | kfree(link_path_buffer); | |
1931 | kfree(translated); | |
1932 | return err; | |
1933 | } | |
1934 | ||
1935 | static noinline int ntfs_readlink_hlp(const struct dentry *link_de, | |
1936 | struct inode *inode, char *buffer, | |
82cae269 KK |
1937 | int buflen) |
1938 | { | |
4dbe8e44 | 1939 | int i, err = -EINVAL; |
82cae269 KK |
1940 | struct ntfs_inode *ni = ntfs_i(inode); |
1941 | struct super_block *sb = inode->i_sb; | |
1942 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
4dbe8e44 KK |
1943 | u64 size; |
1944 | u16 ulen = 0; | |
82cae269 KK |
1945 | void *to_free = NULL; |
1946 | struct REPARSE_DATA_BUFFER *rp; | |
4dbe8e44 | 1947 | const __le16 *uname; |
82cae269 KK |
1948 | struct ATTRIB *attr; |
1949 | ||
e8b8e97f | 1950 | /* Reparse data present. Try to parse it. */ |
82cae269 KK |
1951 | static_assert(!offsetof(struct REPARSE_DATA_BUFFER, ReparseTag)); |
1952 | static_assert(sizeof(u32) == sizeof(rp->ReparseTag)); | |
1953 | ||
1954 | *buffer = 0; | |
1955 | ||
82cae269 | 1956 | attr = ni_find_attr(ni, NULL, NULL, ATTR_REPARSE, NULL, 0, NULL, NULL); |
4dbe8e44 | 1957 | if (!attr) |
82cae269 | 1958 | goto out; |
82cae269 KK |
1959 | |
1960 | if (!attr->non_res) { | |
4dbe8e44 KK |
1961 | rp = resident_data_ex(attr, sizeof(struct REPARSE_DATA_BUFFER)); |
1962 | if (!rp) | |
82cae269 | 1963 | goto out; |
4dbe8e44 | 1964 | size = le32_to_cpu(attr->res.data_size); |
82cae269 | 1965 | } else { |
4dbe8e44 KK |
1966 | size = le64_to_cpu(attr->nres.data_size); |
1967 | rp = NULL; | |
1968 | } | |
1969 | ||
1970 | if (size > sbi->reparse.max_size || size <= sizeof(u32)) | |
1971 | goto out; | |
1972 | ||
1973 | if (!rp) { | |
1974 | rp = kmalloc(size, GFP_NOFS); | |
82cae269 KK |
1975 | if (!rp) { |
1976 | err = -ENOMEM; | |
1977 | goto out; | |
1978 | } | |
1979 | to_free = rp; | |
4dbe8e44 KK |
1980 | /* Read into temporal buffer. */ |
1981 | err = ntfs_read_run_nb(sbi, &ni->file.run, 0, rp, size, NULL); | |
82cae269 KK |
1982 | if (err) |
1983 | goto out; | |
1984 | } | |
1985 | ||
e8b8e97f | 1986 | /* Microsoft Tag. */ |
82cae269 KK |
1987 | switch (rp->ReparseTag) { |
1988 | case IO_REPARSE_TAG_MOUNT_POINT: | |
e8b8e97f | 1989 | /* Mount points and junctions. */ |
82cae269 | 1990 | /* Can we use 'Rp->MountPointReparseBuffer.PrintNameLength'? */ |
4dbe8e44 KK |
1991 | if (size <= offsetof(struct REPARSE_DATA_BUFFER, |
1992 | MountPointReparseBuffer.PathBuffer)) | |
82cae269 | 1993 | goto out; |
4dbe8e44 KK |
1994 | uname = Add2Ptr(rp, |
1995 | offsetof(struct REPARSE_DATA_BUFFER, | |
1996 | MountPointReparseBuffer.PathBuffer) + | |
1997 | le16_to_cpu(rp->MountPointReparseBuffer | |
1998 | .PrintNameOffset)); | |
1999 | ulen = le16_to_cpu(rp->MountPointReparseBuffer.PrintNameLength); | |
82cae269 KK |
2000 | break; |
2001 | ||
2002 | case IO_REPARSE_TAG_SYMLINK: | |
2003 | /* FolderSymbolicLink */ | |
2004 | /* Can we use 'Rp->SymbolicLinkReparseBuffer.PrintNameLength'? */ | |
4dbe8e44 KK |
2005 | if (size <= offsetof(struct REPARSE_DATA_BUFFER, |
2006 | SymbolicLinkReparseBuffer.PathBuffer)) | |
82cae269 | 2007 | goto out; |
4dbe8e44 KK |
2008 | uname = Add2Ptr( |
2009 | rp, offsetof(struct REPARSE_DATA_BUFFER, | |
2010 | SymbolicLinkReparseBuffer.PathBuffer) + | |
2011 | le16_to_cpu(rp->SymbolicLinkReparseBuffer | |
2012 | .PrintNameOffset)); | |
2013 | ulen = le16_to_cpu( | |
82cae269 KK |
2014 | rp->SymbolicLinkReparseBuffer.PrintNameLength); |
2015 | break; | |
2016 | ||
2017 | case IO_REPARSE_TAG_CLOUD: | |
2018 | case IO_REPARSE_TAG_CLOUD_1: | |
2019 | case IO_REPARSE_TAG_CLOUD_2: | |
2020 | case IO_REPARSE_TAG_CLOUD_3: | |
2021 | case IO_REPARSE_TAG_CLOUD_4: | |
2022 | case IO_REPARSE_TAG_CLOUD_5: | |
2023 | case IO_REPARSE_TAG_CLOUD_6: | |
2024 | case IO_REPARSE_TAG_CLOUD_7: | |
2025 | case IO_REPARSE_TAG_CLOUD_8: | |
2026 | case IO_REPARSE_TAG_CLOUD_9: | |
2027 | case IO_REPARSE_TAG_CLOUD_A: | |
2028 | case IO_REPARSE_TAG_CLOUD_B: | |
2029 | case IO_REPARSE_TAG_CLOUD_C: | |
2030 | case IO_REPARSE_TAG_CLOUD_D: | |
2031 | case IO_REPARSE_TAG_CLOUD_E: | |
2032 | case IO_REPARSE_TAG_CLOUD_F: | |
2033 | err = sizeof("OneDrive") - 1; | |
2034 | if (err > buflen) | |
2035 | err = buflen; | |
2036 | memcpy(buffer, "OneDrive", err); | |
2037 | goto out; | |
2038 | ||
2039 | default: | |
2040 | if (IsReparseTagMicrosoft(rp->ReparseTag)) { | |
d3624466 | 2041 | /* Unknown Microsoft Tag. */ |
82cae269 KK |
2042 | goto out; |
2043 | } | |
2044 | if (!IsReparseTagNameSurrogate(rp->ReparseTag) || | |
4dbe8e44 | 2045 | size <= sizeof(struct REPARSE_POINT)) { |
82cae269 KK |
2046 | goto out; |
2047 | } | |
2048 | ||
e8b8e97f | 2049 | /* Users tag. */ |
4dbe8e44 KK |
2050 | uname = Add2Ptr(rp, sizeof(struct REPARSE_POINT)); |
2051 | ulen = le16_to_cpu(rp->ReparseDataLength) - | |
82cae269 KK |
2052 | sizeof(struct REPARSE_POINT); |
2053 | } | |
2054 | ||
e8b8e97f | 2055 | /* Convert nlen from bytes to UNICODE chars. */ |
4dbe8e44 | 2056 | ulen >>= 1; |
82cae269 | 2057 | |
e8b8e97f | 2058 | /* Check that name is available. */ |
4dbe8e44 | 2059 | if (!ulen || uname + ulen > (__le16 *)Add2Ptr(rp, size)) |
82cae269 KK |
2060 | goto out; |
2061 | ||
e8b8e97f | 2062 | /* If name is already zero terminated then truncate it now. */ |
4dbe8e44 KK |
2063 | if (!uname[ulen - 1]) |
2064 | ulen -= 1; | |
82cae269 | 2065 | |
4dbe8e44 | 2066 | err = ntfs_utf16_to_nls(sbi, uname, ulen, buffer, buflen); |
82cae269 KK |
2067 | |
2068 | if (err < 0) | |
2069 | goto out; | |
2070 | ||
e8b8e97f | 2071 | /* Translate Windows '\' into Linux '/'. */ |
82cae269 KK |
2072 | for (i = 0; i < err; i++) { |
2073 | if (buffer[i] == '\\') | |
2074 | buffer[i] = '/'; | |
2075 | } | |
2076 | ||
e8b8e97f | 2077 | /* Always set last zero. */ |
82cae269 | 2078 | buffer[err] = 0; |
0a4e7ce6 DP |
2079 | |
2080 | /* If this is a junction, translate the link target. */ | |
2081 | if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) | |
2082 | err = ntfs_translate_junction(sb, link_de, buffer, err, buflen); | |
2083 | ||
82cae269 | 2084 | out: |
195c52bd | 2085 | kfree(to_free); |
82cae269 KK |
2086 | return err; |
2087 | } | |
2088 | ||
2089 | static const char *ntfs_get_link(struct dentry *de, struct inode *inode, | |
2090 | struct delayed_call *done) | |
2091 | { | |
2092 | int err; | |
2093 | char *ret; | |
2094 | ||
2095 | if (!de) | |
2096 | return ERR_PTR(-ECHILD); | |
2097 | ||
2098 | ret = kmalloc(PAGE_SIZE, GFP_NOFS); | |
2099 | if (!ret) | |
2100 | return ERR_PTR(-ENOMEM); | |
2101 | ||
0a4e7ce6 | 2102 | err = ntfs_readlink_hlp(de, inode, ret, PAGE_SIZE); |
82cae269 KK |
2103 | if (err < 0) { |
2104 | kfree(ret); | |
2105 | return ERR_PTR(err); | |
2106 | } | |
2107 | ||
2108 | set_delayed_call(done, kfree_link, ret); | |
2109 | ||
2110 | return ret; | |
2111 | } | |
2112 | ||
2113 | // clang-format off | |
2114 | const struct inode_operations ntfs_link_inode_operations = { | |
2115 | .get_link = ntfs_get_link, | |
2116 | .setattr = ntfs3_setattr, | |
2117 | .listxattr = ntfs_listxattr, | |
82cae269 KK |
2118 | }; |
2119 | ||
2120 | const struct address_space_operations ntfs_aops = { | |
f132ab7d | 2121 | .read_folio = ntfs_read_folio, |
82cae269 | 2122 | .readahead = ntfs_readahead, |
82cae269 KK |
2123 | .writepages = ntfs_writepages, |
2124 | .write_begin = ntfs_write_begin, | |
2125 | .write_end = ntfs_write_end, | |
2126 | .direct_IO = ntfs_direct_IO, | |
2127 | .bmap = ntfs_bmap, | |
e621900a | 2128 | .dirty_folio = block_dirty_folio, |
25a89826 | 2129 | .migrate_folio = buffer_migrate_folio, |
724bbe49 | 2130 | .invalidate_folio = block_invalidate_folio, |
82cae269 KK |
2131 | }; |
2132 | ||
2133 | const struct address_space_operations ntfs_aops_cmpr = { | |
f132ab7d | 2134 | .read_folio = ntfs_read_folio, |
82cae269 KK |
2135 | .readahead = ntfs_readahead, |
2136 | }; | |
2137 | // clang-format on |