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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)) { | |
84 | err = -EINVAL; | |
85 | ntfs_err(sb, "Inode r=%x is not in use!", (u32)ino); | |
86 | goto out; | |
87 | } | |
88 | ||
89 | if (le32_to_cpu(rec->total) != sbi->record_size) { | |
d3624466 | 90 | /* Bad inode? */ |
82cae269 KK |
91 | err = -EINVAL; |
92 | goto out; | |
93 | } | |
94 | ||
95 | if (!is_rec_base(rec)) | |
96 | goto Ok; | |
97 | ||
e8b8e97f | 98 | /* Record should contain $I30 root. */ |
82cae269 KK |
99 | is_dir = rec->flags & RECORD_FLAG_DIR; |
100 | ||
101 | inode->i_generation = le16_to_cpu(rec->seq); | |
102 | ||
e8b8e97f | 103 | /* Enumerate all struct Attributes MFT. */ |
82cae269 KK |
104 | le = NULL; |
105 | attr = NULL; | |
106 | ||
107 | /* | |
e8b8e97f | 108 | * To reduce tab pressure use goto instead of |
82cae269 KK |
109 | * while( (attr = ni_enum_attr_ex(ni, attr, &le, NULL) )) |
110 | */ | |
111 | next_attr: | |
112 | run = NULL; | |
113 | err = -EINVAL; | |
114 | attr = ni_enum_attr_ex(ni, attr, &le, NULL); | |
115 | if (!attr) | |
116 | goto end_enum; | |
117 | ||
118 | if (le && le->vcn) { | |
e8b8e97f | 119 | /* This is non primary attribute segment. Ignore if not MFT. */ |
82cae269 KK |
120 | if (ino != MFT_REC_MFT || attr->type != ATTR_DATA) |
121 | goto next_attr; | |
122 | ||
123 | run = &ni->file.run; | |
124 | asize = le32_to_cpu(attr->size); | |
125 | goto attr_unpack_run; | |
126 | } | |
127 | ||
128 | roff = attr->non_res ? 0 : le16_to_cpu(attr->res.data_off); | |
129 | rsize = attr->non_res ? 0 : le32_to_cpu(attr->res.data_size); | |
130 | asize = le32_to_cpu(attr->size); | |
131 | ||
132 | switch (attr->type) { | |
133 | case ATTR_STD: | |
134 | if (attr->non_res || | |
135 | asize < sizeof(struct ATTR_STD_INFO) + roff || | |
136 | rsize < sizeof(struct ATTR_STD_INFO)) | |
137 | goto out; | |
138 | ||
139 | if (std5) | |
140 | goto next_attr; | |
141 | ||
142 | std5 = Add2Ptr(attr, roff); | |
143 | ||
144 | #ifdef STATX_BTIME | |
145 | nt2kernel(std5->cr_time, &ni->i_crtime); | |
146 | #endif | |
147 | nt2kernel(std5->a_time, &inode->i_atime); | |
148 | nt2kernel(std5->c_time, &inode->i_ctime); | |
149 | nt2kernel(std5->m_time, &inode->i_mtime); | |
150 | ||
151 | ni->std_fa = std5->fa; | |
152 | ||
153 | if (asize >= sizeof(struct ATTR_STD_INFO5) + roff && | |
154 | rsize >= sizeof(struct ATTR_STD_INFO5)) | |
155 | ni->std_security_id = std5->security_id; | |
156 | goto next_attr; | |
157 | ||
158 | case ATTR_LIST: | |
159 | if (attr->name_len || le || ino == MFT_REC_LOG) | |
160 | goto out; | |
161 | ||
162 | err = ntfs_load_attr_list(ni, attr); | |
163 | if (err) | |
164 | goto out; | |
165 | ||
166 | le = NULL; | |
167 | attr = NULL; | |
168 | goto next_attr; | |
169 | ||
170 | case ATTR_NAME: | |
171 | if (attr->non_res || asize < SIZEOF_ATTRIBUTE_FILENAME + roff || | |
172 | rsize < SIZEOF_ATTRIBUTE_FILENAME) | |
173 | goto out; | |
174 | ||
175 | fname = Add2Ptr(attr, roff); | |
176 | if (fname->type == FILE_NAME_DOS) | |
177 | goto next_attr; | |
178 | ||
179 | names += 1; | |
180 | if (name && name->len == fname->name_len && | |
181 | !ntfs_cmp_names_cpu(name, (struct le_str *)&fname->name_len, | |
182 | NULL, false)) | |
183 | is_match = true; | |
184 | ||
185 | goto next_attr; | |
186 | ||
187 | case ATTR_DATA: | |
188 | if (is_dir) { | |
e8b8e97f | 189 | /* Ignore data attribute in dir record. */ |
82cae269 KK |
190 | goto next_attr; |
191 | } | |
192 | ||
193 | if (ino == MFT_REC_BADCLUST && !attr->non_res) | |
194 | goto next_attr; | |
195 | ||
196 | if (attr->name_len && | |
197 | ((ino != MFT_REC_BADCLUST || !attr->non_res || | |
198 | attr->name_len != ARRAY_SIZE(BAD_NAME) || | |
199 | memcmp(attr_name(attr), BAD_NAME, sizeof(BAD_NAME))) && | |
200 | (ino != MFT_REC_SECURE || !attr->non_res || | |
201 | attr->name_len != ARRAY_SIZE(SDS_NAME) || | |
202 | memcmp(attr_name(attr), SDS_NAME, sizeof(SDS_NAME))))) { | |
e8b8e97f | 203 | /* File contains stream attribute. Ignore it. */ |
82cae269 KK |
204 | goto next_attr; |
205 | } | |
206 | ||
207 | if (is_attr_sparsed(attr)) | |
208 | ni->std_fa |= FILE_ATTRIBUTE_SPARSE_FILE; | |
209 | else | |
210 | ni->std_fa &= ~FILE_ATTRIBUTE_SPARSE_FILE; | |
211 | ||
212 | if (is_attr_compressed(attr)) | |
213 | ni->std_fa |= FILE_ATTRIBUTE_COMPRESSED; | |
214 | else | |
215 | ni->std_fa &= ~FILE_ATTRIBUTE_COMPRESSED; | |
216 | ||
217 | if (is_attr_encrypted(attr)) | |
218 | ni->std_fa |= FILE_ATTRIBUTE_ENCRYPTED; | |
219 | else | |
220 | ni->std_fa &= ~FILE_ATTRIBUTE_ENCRYPTED; | |
221 | ||
222 | if (!attr->non_res) { | |
223 | ni->i_valid = inode->i_size = rsize; | |
224 | inode_set_bytes(inode, rsize); | |
82cae269 KK |
225 | } |
226 | ||
564c97bd | 227 | mode = S_IFREG | (0777 & sbi->options->fs_fmask_inv); |
82cae269 KK |
228 | |
229 | if (!attr->non_res) { | |
230 | ni->ni_flags |= NI_FLAG_RESIDENT; | |
231 | goto next_attr; | |
232 | } | |
233 | ||
234 | inode_set_bytes(inode, attr_ondisk_size(attr)); | |
235 | ||
236 | ni->i_valid = le64_to_cpu(attr->nres.valid_size); | |
237 | inode->i_size = le64_to_cpu(attr->nres.data_size); | |
238 | if (!attr->nres.alloc_size) | |
239 | goto next_attr; | |
240 | ||
241 | run = ino == MFT_REC_BITMAP ? &sbi->used.bitmap.run | |
242 | : &ni->file.run; | |
243 | break; | |
244 | ||
245 | case ATTR_ROOT: | |
246 | if (attr->non_res) | |
247 | goto out; | |
248 | ||
249 | root = Add2Ptr(attr, roff); | |
250 | is_root = true; | |
251 | ||
252 | if (attr->name_len != ARRAY_SIZE(I30_NAME) || | |
253 | memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME))) | |
254 | goto next_attr; | |
255 | ||
256 | if (root->type != ATTR_NAME || | |
257 | root->rule != NTFS_COLLATION_TYPE_FILENAME) | |
258 | goto out; | |
259 | ||
260 | if (!is_dir) | |
261 | goto next_attr; | |
262 | ||
263 | ni->ni_flags |= NI_FLAG_DIR; | |
264 | ||
265 | err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30); | |
266 | if (err) | |
267 | goto out; | |
268 | ||
269 | mode = sb->s_root | |
564c97bd | 270 | ? (S_IFDIR | (0777 & sbi->options->fs_dmask_inv)) |
82cae269 KK |
271 | : (S_IFDIR | 0777); |
272 | goto next_attr; | |
273 | ||
274 | case ATTR_ALLOC: | |
275 | if (!is_root || attr->name_len != ARRAY_SIZE(I30_NAME) || | |
276 | memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME))) | |
277 | goto next_attr; | |
278 | ||
279 | inode->i_size = le64_to_cpu(attr->nres.data_size); | |
280 | ni->i_valid = le64_to_cpu(attr->nres.valid_size); | |
281 | inode_set_bytes(inode, le64_to_cpu(attr->nres.alloc_size)); | |
282 | ||
283 | run = &ni->dir.alloc_run; | |
284 | break; | |
285 | ||
286 | case ATTR_BITMAP: | |
287 | if (ino == MFT_REC_MFT) { | |
288 | if (!attr->non_res) | |
289 | goto out; | |
290 | #ifndef CONFIG_NTFS3_64BIT_CLUSTER | |
291 | /* 0x20000000 = 2^32 / 8 */ | |
292 | if (le64_to_cpu(attr->nres.alloc_size) >= 0x20000000) | |
293 | goto out; | |
294 | #endif | |
295 | run = &sbi->mft.bitmap.run; | |
296 | break; | |
297 | } else if (is_dir && attr->name_len == ARRAY_SIZE(I30_NAME) && | |
298 | !memcmp(attr_name(attr), I30_NAME, | |
299 | sizeof(I30_NAME)) && | |
300 | attr->non_res) { | |
301 | run = &ni->dir.bitmap_run; | |
302 | break; | |
303 | } | |
304 | goto next_attr; | |
305 | ||
306 | case ATTR_REPARSE: | |
307 | if (attr->name_len) | |
308 | goto next_attr; | |
309 | ||
310 | rp_fa = ni_parse_reparse(ni, attr, &rp); | |
311 | switch (rp_fa) { | |
312 | case REPARSE_LINK: | |
22b05f1a KK |
313 | /* |
314 | * Normal symlink. | |
315 | * Assume one unicode symbol == one utf8. | |
316 | */ | |
317 | inode->i_size = le16_to_cpu(rp.SymbolicLinkReparseBuffer | |
318 | .PrintNameLength) / | |
319 | sizeof(u16); | |
82cae269 | 320 | |
82cae269 KK |
321 | ni->i_valid = inode->i_size; |
322 | ||
e8b8e97f | 323 | /* Clear directory bit. */ |
82cae269 KK |
324 | if (ni->ni_flags & NI_FLAG_DIR) { |
325 | indx_clear(&ni->dir); | |
326 | memset(&ni->dir, 0, sizeof(ni->dir)); | |
327 | ni->ni_flags &= ~NI_FLAG_DIR; | |
328 | } else { | |
329 | run_close(&ni->file.run); | |
330 | } | |
331 | mode = S_IFLNK | 0777; | |
332 | is_dir = false; | |
333 | if (attr->non_res) { | |
334 | run = &ni->file.run; | |
e8b8e97f | 335 | goto attr_unpack_run; // Double break. |
82cae269 KK |
336 | } |
337 | break; | |
338 | ||
339 | case REPARSE_COMPRESSED: | |
340 | break; | |
341 | ||
342 | case REPARSE_DEDUPLICATED: | |
343 | break; | |
344 | } | |
345 | goto next_attr; | |
346 | ||
347 | case ATTR_EA_INFO: | |
348 | if (!attr->name_len && | |
349 | resident_data_ex(attr, sizeof(struct EA_INFO))) { | |
350 | ni->ni_flags |= NI_FLAG_EA; | |
351 | /* | |
352 | * ntfs_get_wsl_perm updates inode->i_uid, inode->i_gid, inode->i_mode | |
353 | */ | |
354 | inode->i_mode = mode; | |
355 | ntfs_get_wsl_perm(inode); | |
356 | mode = inode->i_mode; | |
357 | } | |
358 | goto next_attr; | |
359 | ||
360 | default: | |
361 | goto next_attr; | |
362 | } | |
363 | ||
364 | attr_unpack_run: | |
365 | roff = le16_to_cpu(attr->nres.run_off); | |
366 | ||
367 | t64 = le64_to_cpu(attr->nres.svcn); | |
368 | err = run_unpack_ex(run, sbi, ino, t64, le64_to_cpu(attr->nres.evcn), | |
369 | t64, Add2Ptr(attr, roff), asize - roff); | |
370 | if (err < 0) | |
371 | goto out; | |
372 | err = 0; | |
373 | goto next_attr; | |
374 | ||
375 | end_enum: | |
376 | ||
377 | if (!std5) | |
378 | goto out; | |
379 | ||
380 | if (!is_match && name) { | |
e8b8e97f | 381 | /* Reuse rec as buffer for ascii name. */ |
82cae269 KK |
382 | err = -ENOENT; |
383 | goto out; | |
384 | } | |
385 | ||
386 | if (std5->fa & FILE_ATTRIBUTE_READONLY) | |
387 | mode &= ~0222; | |
388 | ||
389 | if (!names) { | |
390 | err = -EINVAL; | |
391 | goto out; | |
392 | } | |
393 | ||
78ab59fe KK |
394 | if (names != le16_to_cpu(rec->hard_links)) { |
395 | /* Correct minor error on the fly. Do not mark inode as dirty. */ | |
396 | rec->hard_links = cpu_to_le16(names); | |
397 | ni->mi.dirty = true; | |
398 | } | |
399 | ||
82cae269 KK |
400 | set_nlink(inode, names); |
401 | ||
402 | if (S_ISDIR(mode)) { | |
403 | ni->std_fa |= FILE_ATTRIBUTE_DIRECTORY; | |
404 | ||
405 | /* | |
e8b8e97f | 406 | * Dot and dot-dot should be included in count but was not |
82cae269 | 407 | * included in enumeration. |
e8b8e97f | 408 | * Usually a hard links to directories are disabled. |
82cae269 KK |
409 | */ |
410 | inode->i_op = &ntfs_dir_inode_operations; | |
411 | inode->i_fop = &ntfs_dir_operations; | |
412 | ni->i_valid = 0; | |
413 | } else if (S_ISLNK(mode)) { | |
414 | ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY; | |
415 | inode->i_op = &ntfs_link_inode_operations; | |
416 | inode->i_fop = NULL; | |
22b05f1a | 417 | inode_nohighmem(inode); |
82cae269 KK |
418 | } else if (S_ISREG(mode)) { |
419 | ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY; | |
420 | inode->i_op = &ntfs_file_inode_operations; | |
421 | inode->i_fop = &ntfs_file_operations; | |
422 | inode->i_mapping->a_ops = | |
423 | is_compressed(ni) ? &ntfs_aops_cmpr : &ntfs_aops; | |
424 | if (ino != MFT_REC_MFT) | |
425 | init_rwsem(&ni->file.run_lock); | |
426 | } else if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISFIFO(mode) || | |
427 | S_ISSOCK(mode)) { | |
428 | inode->i_op = &ntfs_special_inode_operations; | |
429 | init_special_inode(inode, mode, inode->i_rdev); | |
430 | } else if (fname && fname->home.low == cpu_to_le32(MFT_REC_EXTEND) && | |
431 | fname->home.seq == cpu_to_le16(MFT_REC_EXTEND)) { | |
e8b8e97f | 432 | /* Records in $Extend are not a files or general directories. */ |
82cae269 KK |
433 | } else { |
434 | err = -EINVAL; | |
435 | goto out; | |
436 | } | |
437 | ||
564c97bd | 438 | if ((sbi->options->sys_immutable && |
82cae269 KK |
439 | (std5->fa & FILE_ATTRIBUTE_SYSTEM)) && |
440 | !S_ISFIFO(mode) && !S_ISSOCK(mode) && !S_ISLNK(mode)) { | |
441 | inode->i_flags |= S_IMMUTABLE; | |
442 | } else { | |
443 | inode->i_flags &= ~S_IMMUTABLE; | |
444 | } | |
445 | ||
446 | inode->i_mode = mode; | |
447 | if (!(ni->ni_flags & NI_FLAG_EA)) { | |
e8b8e97f | 448 | /* If no xattr then no security (stored in xattr). */ |
82cae269 KK |
449 | inode->i_flags |= S_NOSEC; |
450 | } | |
451 | ||
452 | Ok: | |
453 | if (ino == MFT_REC_MFT && !sb->s_root) | |
454 | sbi->mft.ni = NULL; | |
455 | ||
456 | unlock_new_inode(inode); | |
457 | ||
458 | return inode; | |
459 | ||
460 | out: | |
461 | if (ino == MFT_REC_MFT && !sb->s_root) | |
462 | sbi->mft.ni = NULL; | |
463 | ||
464 | iget_failed(inode); | |
465 | return ERR_PTR(err); | |
466 | } | |
467 | ||
e8b8e97f KA |
468 | /* |
469 | * ntfs_test_inode | |
470 | * | |
471 | * Return: 1 if match. | |
472 | */ | |
82cae269 KK |
473 | static int ntfs_test_inode(struct inode *inode, void *data) |
474 | { | |
475 | struct MFT_REF *ref = data; | |
476 | ||
477 | return ino_get(ref) == inode->i_ino; | |
478 | } | |
479 | ||
480 | static int ntfs_set_inode(struct inode *inode, void *data) | |
481 | { | |
482 | const struct MFT_REF *ref = data; | |
483 | ||
484 | inode->i_ino = ino_get(ref); | |
485 | return 0; | |
486 | } | |
487 | ||
488 | struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref, | |
489 | const struct cpu_str *name) | |
490 | { | |
491 | struct inode *inode; | |
492 | ||
493 | inode = iget5_locked(sb, ino_get(ref), ntfs_test_inode, ntfs_set_inode, | |
494 | (void *)ref); | |
495 | if (unlikely(!inode)) | |
496 | return ERR_PTR(-ENOMEM); | |
497 | ||
498 | /* If this is a freshly allocated inode, need to read it now. */ | |
499 | if (inode->i_state & I_NEW) | |
500 | inode = ntfs_read_mft(inode, name, ref); | |
501 | else if (ref->seq != ntfs_i(inode)->mi.mrec->seq) { | |
e8b8e97f | 502 | /* Inode overlaps? */ |
82cae269 KK |
503 | make_bad_inode(inode); |
504 | } | |
505 | ||
506 | return inode; | |
507 | } | |
508 | ||
509 | enum get_block_ctx { | |
510 | GET_BLOCK_GENERAL = 0, | |
511 | GET_BLOCK_WRITE_BEGIN = 1, | |
512 | GET_BLOCK_DIRECT_IO_R = 2, | |
513 | GET_BLOCK_DIRECT_IO_W = 3, | |
514 | GET_BLOCK_BMAP = 4, | |
515 | }; | |
516 | ||
517 | static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo, | |
518 | struct buffer_head *bh, int create, | |
519 | enum get_block_ctx ctx) | |
520 | { | |
521 | struct super_block *sb = inode->i_sb; | |
522 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
523 | struct ntfs_inode *ni = ntfs_i(inode); | |
524 | struct page *page = bh->b_page; | |
525 | u8 cluster_bits = sbi->cluster_bits; | |
526 | u32 block_size = sb->s_blocksize; | |
527 | u64 bytes, lbo, valid; | |
528 | u32 off; | |
529 | int err; | |
530 | CLST vcn, lcn, len; | |
531 | bool new; | |
532 | ||
e8b8e97f | 533 | /* Clear previous state. */ |
82cae269 KK |
534 | clear_buffer_new(bh); |
535 | clear_buffer_uptodate(bh); | |
536 | ||
e8b8e97f | 537 | /* Direct write uses 'create=0'. */ |
82cae269 | 538 | if (!create && vbo >= ni->i_valid) { |
e8b8e97f | 539 | /* Out of valid. */ |
82cae269 KK |
540 | return 0; |
541 | } | |
542 | ||
543 | if (vbo >= inode->i_size) { | |
e8b8e97f | 544 | /* Out of size. */ |
82cae269 KK |
545 | return 0; |
546 | } | |
547 | ||
548 | if (is_resident(ni)) { | |
549 | ni_lock(ni); | |
550 | err = attr_data_read_resident(ni, page); | |
551 | ni_unlock(ni); | |
552 | ||
553 | if (!err) | |
554 | set_buffer_uptodate(bh); | |
555 | bh->b_size = block_size; | |
556 | return err; | |
557 | } | |
558 | ||
559 | vcn = vbo >> cluster_bits; | |
560 | off = vbo & sbi->cluster_mask; | |
561 | new = false; | |
562 | ||
563 | err = attr_data_get_block(ni, vcn, 1, &lcn, &len, create ? &new : NULL); | |
564 | if (err) | |
565 | goto out; | |
566 | ||
567 | if (!len) | |
568 | return 0; | |
569 | ||
570 | bytes = ((u64)len << cluster_bits) - off; | |
571 | ||
572 | if (lcn == SPARSE_LCN) { | |
573 | if (!create) { | |
574 | if (bh->b_size > bytes) | |
575 | bh->b_size = bytes; | |
576 | return 0; | |
577 | } | |
578 | WARN_ON(1); | |
579 | } | |
580 | ||
581 | if (new) { | |
582 | set_buffer_new(bh); | |
583 | if ((len << cluster_bits) > block_size) | |
584 | ntfs_sparse_cluster(inode, page, vcn, len); | |
585 | } | |
586 | ||
587 | lbo = ((u64)lcn << cluster_bits) + off; | |
588 | ||
589 | set_buffer_mapped(bh); | |
590 | bh->b_bdev = sb->s_bdev; | |
591 | bh->b_blocknr = lbo >> sb->s_blocksize_bits; | |
592 | ||
593 | valid = ni->i_valid; | |
594 | ||
595 | if (ctx == GET_BLOCK_DIRECT_IO_W) { | |
e8b8e97f | 596 | /* ntfs_direct_IO will update ni->i_valid. */ |
82cae269 KK |
597 | if (vbo >= valid) |
598 | set_buffer_new(bh); | |
599 | } else if (create) { | |
d3624466 | 600 | /* Normal write. */ |
82cae269 KK |
601 | if (bytes > bh->b_size) |
602 | bytes = bh->b_size; | |
603 | ||
604 | if (vbo >= valid) | |
605 | set_buffer_new(bh); | |
606 | ||
607 | if (vbo + bytes > valid) { | |
608 | ni->i_valid = vbo + bytes; | |
609 | mark_inode_dirty(inode); | |
610 | } | |
611 | } else if (vbo >= valid) { | |
e8b8e97f KA |
612 | /* Read out of valid data. */ |
613 | /* Should never be here 'cause already checked. */ | |
82cae269 KK |
614 | clear_buffer_mapped(bh); |
615 | } else if (vbo + bytes <= valid) { | |
e8b8e97f | 616 | /* Normal read. */ |
82cae269 | 617 | } else if (vbo + block_size <= valid) { |
e8b8e97f | 618 | /* Normal short read. */ |
82cae269 KK |
619 | bytes = block_size; |
620 | } else { | |
621 | /* | |
e8b8e97f | 622 | * Read across valid size: vbo < valid && valid < vbo + block_size |
82cae269 KK |
623 | */ |
624 | bytes = block_size; | |
625 | ||
626 | if (page) { | |
627 | u32 voff = valid - vbo; | |
628 | ||
629 | bh->b_size = block_size; | |
630 | off = vbo & (PAGE_SIZE - 1); | |
631 | set_bh_page(bh, page, off); | |
632 | ll_rw_block(REQ_OP_READ, 0, 1, &bh); | |
633 | wait_on_buffer(bh); | |
634 | if (!buffer_uptodate(bh)) { | |
635 | err = -EIO; | |
636 | goto out; | |
637 | } | |
638 | zero_user_segment(page, off + voff, off + block_size); | |
639 | } | |
640 | } | |
641 | ||
642 | if (bh->b_size > bytes) | |
643 | bh->b_size = bytes; | |
644 | ||
645 | #ifndef __LP64__ | |
646 | if (ctx == GET_BLOCK_DIRECT_IO_W || ctx == GET_BLOCK_DIRECT_IO_R) { | |
647 | static_assert(sizeof(size_t) < sizeof(loff_t)); | |
648 | if (bytes > 0x40000000u) | |
649 | bh->b_size = 0x40000000u; | |
650 | } | |
651 | #endif | |
652 | ||
653 | return 0; | |
654 | ||
655 | out: | |
656 | return err; | |
657 | } | |
658 | ||
659 | int ntfs_get_block(struct inode *inode, sector_t vbn, | |
660 | struct buffer_head *bh_result, int create) | |
661 | { | |
662 | return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits, | |
663 | bh_result, create, GET_BLOCK_GENERAL); | |
664 | } | |
665 | ||
666 | static int ntfs_get_block_bmap(struct inode *inode, sector_t vsn, | |
667 | struct buffer_head *bh_result, int create) | |
668 | { | |
669 | return ntfs_get_block_vbo(inode, | |
670 | (u64)vsn << inode->i_sb->s_blocksize_bits, | |
671 | bh_result, create, GET_BLOCK_BMAP); | |
672 | } | |
673 | ||
674 | static sector_t ntfs_bmap(struct address_space *mapping, sector_t block) | |
675 | { | |
676 | return generic_block_bmap(mapping, block, ntfs_get_block_bmap); | |
677 | } | |
678 | ||
f132ab7d | 679 | static int ntfs_read_folio(struct file *file, struct folio *folio) |
82cae269 | 680 | { |
f132ab7d | 681 | struct page *page = &folio->page; |
82cae269 KK |
682 | int err; |
683 | struct address_space *mapping = page->mapping; | |
684 | struct inode *inode = mapping->host; | |
685 | struct ntfs_inode *ni = ntfs_i(inode); | |
686 | ||
687 | if (is_resident(ni)) { | |
688 | ni_lock(ni); | |
689 | err = attr_data_read_resident(ni, page); | |
690 | ni_unlock(ni); | |
691 | if (err != E_NTFS_NONRESIDENT) { | |
692 | unlock_page(page); | |
693 | return err; | |
694 | } | |
695 | } | |
696 | ||
697 | if (is_compressed(ni)) { | |
698 | ni_lock(ni); | |
699 | err = ni_readpage_cmpr(ni, page); | |
700 | ni_unlock(ni); | |
701 | return err; | |
702 | } | |
703 | ||
e8b8e97f | 704 | /* Normal + sparse files. */ |
f132ab7d | 705 | return mpage_read_folio(folio, ntfs_get_block); |
82cae269 KK |
706 | } |
707 | ||
708 | static void ntfs_readahead(struct readahead_control *rac) | |
709 | { | |
710 | struct address_space *mapping = rac->mapping; | |
711 | struct inode *inode = mapping->host; | |
712 | struct ntfs_inode *ni = ntfs_i(inode); | |
713 | u64 valid; | |
714 | loff_t pos; | |
715 | ||
716 | if (is_resident(ni)) { | |
e8b8e97f | 717 | /* No readahead for resident. */ |
82cae269 KK |
718 | return; |
719 | } | |
720 | ||
721 | if (is_compressed(ni)) { | |
e8b8e97f | 722 | /* No readahead for compressed. */ |
82cae269 KK |
723 | return; |
724 | } | |
725 | ||
726 | valid = ni->i_valid; | |
727 | pos = readahead_pos(rac); | |
728 | ||
729 | if (valid < i_size_read(inode) && pos <= valid && | |
730 | valid < pos + readahead_length(rac)) { | |
e8b8e97f | 731 | /* Range cross 'valid'. Read it page by page. */ |
82cae269 KK |
732 | return; |
733 | } | |
734 | ||
735 | mpage_readahead(rac, ntfs_get_block); | |
736 | } | |
737 | ||
738 | static int ntfs_get_block_direct_IO_R(struct inode *inode, sector_t iblock, | |
739 | struct buffer_head *bh_result, int create) | |
740 | { | |
741 | return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits, | |
742 | bh_result, create, GET_BLOCK_DIRECT_IO_R); | |
743 | } | |
744 | ||
745 | static int ntfs_get_block_direct_IO_W(struct inode *inode, sector_t iblock, | |
746 | struct buffer_head *bh_result, int create) | |
747 | { | |
748 | return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits, | |
749 | bh_result, create, GET_BLOCK_DIRECT_IO_W); | |
750 | } | |
751 | ||
752 | static ssize_t ntfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) | |
753 | { | |
754 | struct file *file = iocb->ki_filp; | |
755 | struct address_space *mapping = file->f_mapping; | |
756 | struct inode *inode = mapping->host; | |
757 | struct ntfs_inode *ni = ntfs_i(inode); | |
758 | loff_t vbo = iocb->ki_pos; | |
759 | loff_t end; | |
760 | int wr = iov_iter_rw(iter) & WRITE; | |
52e00ea6 | 761 | size_t iter_count = iov_iter_count(iter); |
82cae269 KK |
762 | loff_t valid; |
763 | ssize_t ret; | |
764 | ||
765 | if (is_resident(ni)) { | |
e8b8e97f | 766 | /* Switch to buffered write. */ |
82cae269 KK |
767 | ret = 0; |
768 | goto out; | |
769 | } | |
770 | ||
771 | ret = blockdev_direct_IO(iocb, inode, iter, | |
772 | wr ? ntfs_get_block_direct_IO_W | |
773 | : ntfs_get_block_direct_IO_R); | |
774 | ||
52e00ea6 KK |
775 | if (ret > 0) |
776 | end = vbo + ret; | |
777 | else if (wr && ret == -EIOCBQUEUED) | |
778 | end = vbo + iter_count; | |
779 | else | |
82cae269 KK |
780 | goto out; |
781 | ||
82cae269 KK |
782 | valid = ni->i_valid; |
783 | if (wr) { | |
784 | if (end > valid && !S_ISBLK(inode->i_mode)) { | |
785 | ni->i_valid = end; | |
786 | mark_inode_dirty(inode); | |
787 | } | |
788 | } else if (vbo < valid && valid < end) { | |
e8b8e97f | 789 | /* Fix page. */ |
82cae269 KK |
790 | iov_iter_revert(iter, end - valid); |
791 | iov_iter_zero(end - valid, iter); | |
792 | } | |
793 | ||
794 | out: | |
795 | return ret; | |
796 | } | |
797 | ||
798 | int ntfs_set_size(struct inode *inode, u64 new_size) | |
799 | { | |
800 | struct super_block *sb = inode->i_sb; | |
801 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
802 | struct ntfs_inode *ni = ntfs_i(inode); | |
803 | int err; | |
804 | ||
e8b8e97f | 805 | /* Check for maximum file size. */ |
82cae269 KK |
806 | if (is_sparsed(ni) || is_compressed(ni)) { |
807 | if (new_size > sbi->maxbytes_sparse) { | |
808 | err = -EFBIG; | |
809 | goto out; | |
810 | } | |
811 | } else if (new_size > sbi->maxbytes) { | |
812 | err = -EFBIG; | |
813 | goto out; | |
814 | } | |
815 | ||
816 | ni_lock(ni); | |
817 | down_write(&ni->file.run_lock); | |
818 | ||
819 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size, | |
820 | &ni->i_valid, true, NULL); | |
821 | ||
822 | up_write(&ni->file.run_lock); | |
823 | ni_unlock(ni); | |
824 | ||
825 | mark_inode_dirty(inode); | |
826 | ||
827 | out: | |
828 | return err; | |
829 | } | |
830 | ||
831 | static int ntfs_writepage(struct page *page, struct writeback_control *wbc) | |
832 | { | |
833 | struct address_space *mapping = page->mapping; | |
834 | struct inode *inode = mapping->host; | |
835 | struct ntfs_inode *ni = ntfs_i(inode); | |
836 | int err; | |
837 | ||
838 | if (is_resident(ni)) { | |
839 | ni_lock(ni); | |
840 | err = attr_data_write_resident(ni, page); | |
841 | ni_unlock(ni); | |
842 | if (err != E_NTFS_NONRESIDENT) { | |
843 | unlock_page(page); | |
844 | return err; | |
845 | } | |
846 | } | |
847 | ||
848 | return block_write_full_page(page, ntfs_get_block, wbc); | |
849 | } | |
850 | ||
851 | static int ntfs_writepages(struct address_space *mapping, | |
852 | struct writeback_control *wbc) | |
853 | { | |
854 | struct inode *inode = mapping->host; | |
855 | struct ntfs_inode *ni = ntfs_i(inode); | |
e8b8e97f | 856 | /* Redirect call to 'ntfs_writepage' for resident files. */ |
82cae269 KK |
857 | get_block_t *get_block = is_resident(ni) ? NULL : &ntfs_get_block; |
858 | ||
859 | return mpage_writepages(mapping, wbc, get_block); | |
860 | } | |
861 | ||
862 | static int ntfs_get_block_write_begin(struct inode *inode, sector_t vbn, | |
863 | struct buffer_head *bh_result, int create) | |
864 | { | |
865 | return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits, | |
866 | bh_result, create, GET_BLOCK_WRITE_BEGIN); | |
867 | } | |
868 | ||
44ab23b9 MWO |
869 | int ntfs_write_begin(struct file *file, struct address_space *mapping, |
870 | loff_t pos, u32 len, struct page **pagep, void **fsdata) | |
82cae269 KK |
871 | { |
872 | int err; | |
873 | struct inode *inode = mapping->host; | |
874 | struct ntfs_inode *ni = ntfs_i(inode); | |
875 | ||
876 | *pagep = NULL; | |
877 | if (is_resident(ni)) { | |
878 | struct page *page = grab_cache_page_write_begin( | |
b7446e7c | 879 | mapping, pos >> PAGE_SHIFT); |
82cae269 KK |
880 | |
881 | if (!page) { | |
882 | err = -ENOMEM; | |
883 | goto out; | |
884 | } | |
885 | ||
886 | ni_lock(ni); | |
887 | err = attr_data_read_resident(ni, page); | |
888 | ni_unlock(ni); | |
889 | ||
890 | if (!err) { | |
891 | *pagep = page; | |
892 | goto out; | |
893 | } | |
894 | unlock_page(page); | |
895 | put_page(page); | |
896 | ||
897 | if (err != E_NTFS_NONRESIDENT) | |
898 | goto out; | |
899 | } | |
900 | ||
b3992d1e | 901 | err = block_write_begin(mapping, pos, len, pagep, |
82cae269 KK |
902 | ntfs_get_block_write_begin); |
903 | ||
904 | out: | |
905 | return err; | |
906 | } | |
907 | ||
e8b8e97f KA |
908 | /* |
909 | * ntfs_write_end - Address_space_operations::write_end. | |
910 | */ | |
44ab23b9 MWO |
911 | int ntfs_write_end(struct file *file, struct address_space *mapping, |
912 | loff_t pos, u32 len, u32 copied, struct page *page, | |
913 | void *fsdata) | |
82cae269 KK |
914 | { |
915 | struct inode *inode = mapping->host; | |
916 | struct ntfs_inode *ni = ntfs_i(inode); | |
917 | u64 valid = ni->i_valid; | |
918 | bool dirty = false; | |
919 | int err; | |
920 | ||
921 | if (is_resident(ni)) { | |
922 | ni_lock(ni); | |
923 | err = attr_data_write_resident(ni, page); | |
924 | ni_unlock(ni); | |
925 | if (!err) { | |
926 | dirty = true; | |
e8b8e97f | 927 | /* Clear any buffers in page. */ |
82cae269 KK |
928 | if (page_has_buffers(page)) { |
929 | struct buffer_head *head, *bh; | |
930 | ||
931 | bh = head = page_buffers(page); | |
932 | do { | |
933 | clear_buffer_dirty(bh); | |
934 | clear_buffer_mapped(bh); | |
935 | set_buffer_uptodate(bh); | |
936 | } while (head != (bh = bh->b_this_page)); | |
937 | } | |
938 | SetPageUptodate(page); | |
939 | err = copied; | |
940 | } | |
941 | unlock_page(page); | |
942 | put_page(page); | |
943 | } else { | |
944 | err = generic_write_end(file, mapping, pos, len, copied, page, | |
945 | fsdata); | |
946 | } | |
947 | ||
948 | if (err >= 0) { | |
949 | if (!(ni->std_fa & FILE_ATTRIBUTE_ARCHIVE)) { | |
950 | inode->i_ctime = inode->i_mtime = current_time(inode); | |
951 | ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE; | |
952 | dirty = true; | |
953 | } | |
954 | ||
955 | if (valid != ni->i_valid) { | |
e8b8e97f | 956 | /* ni->i_valid is changed in ntfs_get_block_vbo. */ |
82cae269 KK |
957 | dirty = true; |
958 | } | |
959 | ||
960 | if (dirty) | |
961 | mark_inode_dirty(inode); | |
962 | } | |
963 | ||
964 | return err; | |
965 | } | |
966 | ||
967 | int reset_log_file(struct inode *inode) | |
968 | { | |
969 | int err; | |
970 | loff_t pos = 0; | |
971 | u32 log_size = inode->i_size; | |
972 | struct address_space *mapping = inode->i_mapping; | |
973 | ||
974 | for (;;) { | |
975 | u32 len; | |
976 | void *kaddr; | |
977 | struct page *page; | |
978 | ||
979 | len = pos + PAGE_SIZE > log_size ? (log_size - pos) : PAGE_SIZE; | |
980 | ||
b3992d1e | 981 | err = block_write_begin(mapping, pos, len, &page, |
82cae269 KK |
982 | ntfs_get_block_write_begin); |
983 | if (err) | |
984 | goto out; | |
985 | ||
986 | kaddr = kmap_atomic(page); | |
987 | memset(kaddr, -1, len); | |
988 | kunmap_atomic(kaddr); | |
989 | flush_dcache_page(page); | |
990 | ||
991 | err = block_write_end(NULL, mapping, pos, len, len, page, NULL); | |
992 | if (err < 0) | |
993 | goto out; | |
994 | pos += len; | |
995 | ||
996 | if (pos >= log_size) | |
997 | break; | |
998 | balance_dirty_pages_ratelimited(mapping); | |
999 | } | |
1000 | out: | |
1001 | mark_inode_dirty_sync(inode); | |
1002 | ||
1003 | return err; | |
1004 | } | |
1005 | ||
1006 | int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc) | |
1007 | { | |
1008 | return _ni_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL); | |
1009 | } | |
1010 | ||
1011 | int ntfs_sync_inode(struct inode *inode) | |
1012 | { | |
1013 | return _ni_write_inode(inode, 1); | |
1014 | } | |
1015 | ||
1016 | /* | |
e8b8e97f KA |
1017 | * writeback_inode - Helper function for ntfs_flush_inodes(). |
1018 | * | |
1019 | * This writes both the inode and the file data blocks, waiting | |
1020 | * for in flight data blocks before the start of the call. It | |
1021 | * does not wait for any io started during the call. | |
82cae269 KK |
1022 | */ |
1023 | static int writeback_inode(struct inode *inode) | |
1024 | { | |
1025 | int ret = sync_inode_metadata(inode, 0); | |
1026 | ||
1027 | if (!ret) | |
1028 | ret = filemap_fdatawrite(inode->i_mapping); | |
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | /* | |
e8b8e97f KA |
1033 | * ntfs_flush_inodes |
1034 | * | |
1035 | * Write data and metadata corresponding to i1 and i2. The io is | |
82cae269 KK |
1036 | * started but we do not wait for any of it to finish. |
1037 | * | |
e8b8e97f | 1038 | * filemap_flush() is used for the block device, so if there is a dirty |
82cae269 | 1039 | * page for a block already in flight, we will not wait and start the |
e8b8e97f | 1040 | * io over again. |
82cae269 KK |
1041 | */ |
1042 | int ntfs_flush_inodes(struct super_block *sb, struct inode *i1, | |
1043 | struct inode *i2) | |
1044 | { | |
1045 | int ret = 0; | |
1046 | ||
1047 | if (i1) | |
1048 | ret = writeback_inode(i1); | |
1049 | if (!ret && i2) | |
1050 | ret = writeback_inode(i2); | |
1051 | if (!ret) | |
680e667b | 1052 | ret = sync_blockdev_nowait(sb->s_bdev); |
82cae269 KK |
1053 | return ret; |
1054 | } | |
1055 | ||
1056 | int inode_write_data(struct inode *inode, const void *data, size_t bytes) | |
1057 | { | |
1058 | pgoff_t idx; | |
1059 | ||
e8b8e97f | 1060 | /* Write non resident data. */ |
82cae269 KK |
1061 | for (idx = 0; bytes; idx++) { |
1062 | size_t op = bytes > PAGE_SIZE ? PAGE_SIZE : bytes; | |
1063 | struct page *page = ntfs_map_page(inode->i_mapping, idx); | |
1064 | ||
1065 | if (IS_ERR(page)) | |
1066 | return PTR_ERR(page); | |
1067 | ||
1068 | lock_page(page); | |
1069 | WARN_ON(!PageUptodate(page)); | |
1070 | ClearPageUptodate(page); | |
1071 | ||
1072 | memcpy(page_address(page), data, op); | |
1073 | ||
1074 | flush_dcache_page(page); | |
1075 | SetPageUptodate(page); | |
1076 | unlock_page(page); | |
1077 | ||
1078 | ntfs_unmap_page(page); | |
1079 | ||
1080 | bytes -= op; | |
1081 | data = Add2Ptr(data, PAGE_SIZE); | |
1082 | } | |
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | /* | |
e8b8e97f KA |
1087 | * ntfs_reparse_bytes |
1088 | * | |
d3624466 | 1089 | * Number of bytes for REPARSE_DATA_BUFFER(IO_REPARSE_TAG_SYMLINK) |
e8b8e97f | 1090 | * for unicode string of @uni_len length. |
82cae269 KK |
1091 | */ |
1092 | static inline u32 ntfs_reparse_bytes(u32 uni_len) | |
1093 | { | |
e8b8e97f | 1094 | /* Header + unicode string + decorated unicode string. */ |
82cae269 KK |
1095 | return sizeof(short) * (2 * uni_len + 4) + |
1096 | offsetof(struct REPARSE_DATA_BUFFER, | |
1097 | SymbolicLinkReparseBuffer.PathBuffer); | |
1098 | } | |
1099 | ||
1100 | static struct REPARSE_DATA_BUFFER * | |
1101 | ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname, | |
1102 | u32 size, u16 *nsize) | |
1103 | { | |
1104 | int i, err; | |
1105 | struct REPARSE_DATA_BUFFER *rp; | |
1106 | __le16 *rp_name; | |
1107 | typeof(rp->SymbolicLinkReparseBuffer) *rs; | |
1108 | ||
195c52bd | 1109 | rp = kzalloc(ntfs_reparse_bytes(2 * size + 2), GFP_NOFS); |
82cae269 KK |
1110 | if (!rp) |
1111 | return ERR_PTR(-ENOMEM); | |
1112 | ||
1113 | rs = &rp->SymbolicLinkReparseBuffer; | |
1114 | rp_name = rs->PathBuffer; | |
1115 | ||
e8b8e97f | 1116 | /* Convert link name to UTF-16. */ |
82cae269 KK |
1117 | err = ntfs_nls_to_utf16(sbi, symname, size, |
1118 | (struct cpu_str *)(rp_name - 1), 2 * size, | |
1119 | UTF16_LITTLE_ENDIAN); | |
1120 | if (err < 0) | |
1121 | goto out; | |
1122 | ||
e8b8e97f | 1123 | /* err = the length of unicode name of symlink. */ |
82cae269 KK |
1124 | *nsize = ntfs_reparse_bytes(err); |
1125 | ||
1126 | if (*nsize > sbi->reparse.max_size) { | |
1127 | err = -EFBIG; | |
1128 | goto out; | |
1129 | } | |
1130 | ||
e8b8e97f | 1131 | /* Translate Linux '/' into Windows '\'. */ |
82cae269 KK |
1132 | for (i = 0; i < err; i++) { |
1133 | if (rp_name[i] == cpu_to_le16('/')) | |
1134 | rp_name[i] = cpu_to_le16('\\'); | |
1135 | } | |
1136 | ||
1137 | rp->ReparseTag = IO_REPARSE_TAG_SYMLINK; | |
1138 | rp->ReparseDataLength = | |
1139 | cpu_to_le16(*nsize - offsetof(struct REPARSE_DATA_BUFFER, | |
1140 | SymbolicLinkReparseBuffer)); | |
1141 | ||
e8b8e97f | 1142 | /* PrintName + SubstituteName. */ |
82cae269 KK |
1143 | rs->SubstituteNameOffset = cpu_to_le16(sizeof(short) * err); |
1144 | rs->SubstituteNameLength = cpu_to_le16(sizeof(short) * err + 8); | |
1145 | rs->PrintNameLength = rs->SubstituteNameOffset; | |
1146 | ||
1147 | /* | |
e8b8e97f KA |
1148 | * TODO: Use relative path if possible to allow Windows to |
1149 | * parse this path. | |
1150 | * 0-absolute path 1- relative path (SYMLINK_FLAG_RELATIVE). | |
82cae269 KK |
1151 | */ |
1152 | rs->Flags = 0; | |
1153 | ||
1154 | memmove(rp_name + err + 4, rp_name, sizeof(short) * err); | |
1155 | ||
e8b8e97f | 1156 | /* Decorate SubstituteName. */ |
82cae269 KK |
1157 | rp_name += err; |
1158 | rp_name[0] = cpu_to_le16('\\'); | |
1159 | rp_name[1] = cpu_to_le16('?'); | |
1160 | rp_name[2] = cpu_to_le16('?'); | |
1161 | rp_name[3] = cpu_to_le16('\\'); | |
1162 | ||
1163 | return rp; | |
1164 | out: | |
195c52bd | 1165 | kfree(rp); |
82cae269 KK |
1166 | return ERR_PTR(err); |
1167 | } | |
1168 | ||
1169 | struct inode *ntfs_create_inode(struct user_namespace *mnt_userns, | |
1170 | struct inode *dir, struct dentry *dentry, | |
1171 | const struct cpu_str *uni, umode_t mode, | |
1172 | dev_t dev, const char *symname, u32 size, | |
1173 | struct ntfs_fnd *fnd) | |
1174 | { | |
1175 | int err; | |
1176 | struct super_block *sb = dir->i_sb; | |
1177 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
1178 | const struct qstr *name = &dentry->d_name; | |
1179 | CLST ino = 0; | |
1180 | struct ntfs_inode *dir_ni = ntfs_i(dir); | |
1181 | struct ntfs_inode *ni = NULL; | |
1182 | struct inode *inode = NULL; | |
1183 | struct ATTRIB *attr; | |
1184 | struct ATTR_STD_INFO5 *std5; | |
1185 | struct ATTR_FILE_NAME *fname; | |
1186 | struct MFT_REC *rec; | |
1187 | u32 asize, dsize, sd_size; | |
1188 | enum FILE_ATTRIBUTE fa; | |
1189 | __le32 security_id = SECURITY_ID_INVALID; | |
1190 | CLST vcn; | |
1191 | const void *sd; | |
1192 | u16 t16, nsize = 0, aid = 0; | |
1193 | struct INDEX_ROOT *root, *dir_root; | |
1194 | struct NTFS_DE *e, *new_de = NULL; | |
1195 | struct REPARSE_DATA_BUFFER *rp = NULL; | |
1196 | bool rp_inserted = false; | |
1197 | ||
d562e901 KK |
1198 | ni_lock_dir(dir_ni); |
1199 | ||
82cae269 | 1200 | dir_root = indx_get_root(&dir_ni->dir, dir_ni, NULL, NULL); |
d562e901 KK |
1201 | if (!dir_root) { |
1202 | err = -EINVAL; | |
1203 | goto out1; | |
1204 | } | |
82cae269 KK |
1205 | |
1206 | if (S_ISDIR(mode)) { | |
d3624466 | 1207 | /* Use parent's directory attributes. */ |
82cae269 KK |
1208 | fa = dir_ni->std_fa | FILE_ATTRIBUTE_DIRECTORY | |
1209 | FILE_ATTRIBUTE_ARCHIVE; | |
1210 | /* | |
d3624466 KK |
1211 | * By default child directory inherits parent attributes. |
1212 | * Root directory is hidden + system. | |
1213 | * Make an exception for children in root. | |
82cae269 KK |
1214 | */ |
1215 | if (dir->i_ino == MFT_REC_ROOT) | |
1216 | fa &= ~(FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM); | |
1217 | } else if (S_ISLNK(mode)) { | |
1218 | /* It is good idea that link should be the same type (file/dir) as target */ | |
1219 | fa = FILE_ATTRIBUTE_REPARSE_POINT; | |
1220 | ||
1221 | /* | |
d3624466 KK |
1222 | * Linux: there are dir/file/symlink and so on. |
1223 | * NTFS: symlinks are "dir + reparse" or "file + reparse" | |
82cae269 KK |
1224 | * It is good idea to create: |
1225 | * dir + reparse if 'symname' points to directory | |
1226 | * or | |
1227 | * file + reparse if 'symname' points to file | |
e8b8e97f | 1228 | * Unfortunately kern_path hangs if symname contains 'dir'. |
82cae269 KK |
1229 | */ |
1230 | ||
1231 | /* | |
1232 | * struct path path; | |
1233 | * | |
1234 | * if (!kern_path(symname, LOOKUP_FOLLOW, &path)){ | |
1235 | * struct inode *target = d_inode(path.dentry); | |
1236 | * | |
1237 | * if (S_ISDIR(target->i_mode)) | |
1238 | * fa |= FILE_ATTRIBUTE_DIRECTORY; | |
1239 | * // if ( target->i_sb == sb ){ | |
1240 | * // use relative path? | |
1241 | * // } | |
1242 | * path_put(&path); | |
1243 | * } | |
1244 | */ | |
1245 | } else if (S_ISREG(mode)) { | |
564c97bd | 1246 | if (sbi->options->sparse) { |
e8b8e97f | 1247 | /* Sparsed regular file, cause option 'sparse'. */ |
82cae269 KK |
1248 | fa = FILE_ATTRIBUTE_SPARSE_FILE | |
1249 | FILE_ATTRIBUTE_ARCHIVE; | |
1250 | } else if (dir_ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) { | |
e8b8e97f | 1251 | /* Compressed regular file, if parent is compressed. */ |
82cae269 KK |
1252 | fa = FILE_ATTRIBUTE_COMPRESSED | FILE_ATTRIBUTE_ARCHIVE; |
1253 | } else { | |
e8b8e97f | 1254 | /* Regular file, default attributes. */ |
82cae269 KK |
1255 | fa = FILE_ATTRIBUTE_ARCHIVE; |
1256 | } | |
1257 | } else { | |
1258 | fa = FILE_ATTRIBUTE_ARCHIVE; | |
1259 | } | |
1260 | ||
1261 | if (!(mode & 0222)) | |
1262 | fa |= FILE_ATTRIBUTE_READONLY; | |
1263 | ||
e8b8e97f | 1264 | /* Allocate PATH_MAX bytes. */ |
82cae269 KK |
1265 | new_de = __getname(); |
1266 | if (!new_de) { | |
1267 | err = -ENOMEM; | |
1268 | goto out1; | |
1269 | } | |
1270 | ||
e8b8e97f | 1271 | /* Mark rw ntfs as dirty. it will be cleared at umount. */ |
82cae269 KK |
1272 | ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); |
1273 | ||
e8b8e97f | 1274 | /* Step 1: allocate and fill new mft record. */ |
82cae269 KK |
1275 | err = ntfs_look_free_mft(sbi, &ino, false, NULL, NULL); |
1276 | if (err) | |
1277 | goto out2; | |
1278 | ||
1279 | ni = ntfs_new_inode(sbi, ino, fa & FILE_ATTRIBUTE_DIRECTORY); | |
1280 | if (IS_ERR(ni)) { | |
1281 | err = PTR_ERR(ni); | |
1282 | ni = NULL; | |
1283 | goto out3; | |
1284 | } | |
1285 | inode = &ni->vfs_inode; | |
1286 | inode_init_owner(mnt_userns, inode, dir, mode); | |
78ab59fe | 1287 | mode = inode->i_mode; |
82cae269 KK |
1288 | |
1289 | inode->i_atime = inode->i_mtime = inode->i_ctime = ni->i_crtime = | |
1290 | current_time(inode); | |
1291 | ||
1292 | rec = ni->mi.mrec; | |
1293 | rec->hard_links = cpu_to_le16(1); | |
1294 | attr = Add2Ptr(rec, le16_to_cpu(rec->attr_off)); | |
1295 | ||
e8b8e97f | 1296 | /* Get default security id. */ |
82cae269 KK |
1297 | sd = s_default_security; |
1298 | sd_size = sizeof(s_default_security); | |
1299 | ||
1300 | if (is_ntfs3(sbi)) { | |
1301 | security_id = dir_ni->std_security_id; | |
1302 | if (le32_to_cpu(security_id) < SECURITY_ID_FIRST) { | |
1303 | security_id = sbi->security.def_security_id; | |
1304 | ||
1305 | if (security_id == SECURITY_ID_INVALID && | |
1306 | !ntfs_insert_security(sbi, sd, sd_size, | |
1307 | &security_id, NULL)) | |
1308 | sbi->security.def_security_id = security_id; | |
1309 | } | |
1310 | } | |
1311 | ||
e8b8e97f | 1312 | /* Insert standard info. */ |
82cae269 KK |
1313 | std5 = Add2Ptr(attr, SIZEOF_RESIDENT); |
1314 | ||
1315 | if (security_id == SECURITY_ID_INVALID) { | |
1316 | dsize = sizeof(struct ATTR_STD_INFO); | |
1317 | } else { | |
1318 | dsize = sizeof(struct ATTR_STD_INFO5); | |
1319 | std5->security_id = security_id; | |
1320 | ni->std_security_id = security_id; | |
1321 | } | |
1322 | asize = SIZEOF_RESIDENT + dsize; | |
1323 | ||
1324 | attr->type = ATTR_STD; | |
1325 | attr->size = cpu_to_le32(asize); | |
1326 | attr->id = cpu_to_le16(aid++); | |
1327 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1328 | attr->res.data_size = cpu_to_le32(dsize); | |
1329 | ||
1330 | std5->cr_time = std5->m_time = std5->c_time = std5->a_time = | |
1331 | kernel2nt(&inode->i_atime); | |
1332 | ||
1333 | ni->std_fa = fa; | |
1334 | std5->fa = fa; | |
1335 | ||
1336 | attr = Add2Ptr(attr, asize); | |
1337 | ||
e8b8e97f | 1338 | /* Insert file name. */ |
82cae269 KK |
1339 | err = fill_name_de(sbi, new_de, name, uni); |
1340 | if (err) | |
1341 | goto out4; | |
1342 | ||
1343 | mi_get_ref(&ni->mi, &new_de->ref); | |
1344 | ||
1345 | fname = (struct ATTR_FILE_NAME *)(new_de + 1); | |
1346 | mi_get_ref(&dir_ni->mi, &fname->home); | |
1347 | fname->dup.cr_time = fname->dup.m_time = fname->dup.c_time = | |
1348 | fname->dup.a_time = std5->cr_time; | |
1349 | fname->dup.alloc_size = fname->dup.data_size = 0; | |
1350 | fname->dup.fa = std5->fa; | |
1351 | fname->dup.ea_size = fname->dup.reparse = 0; | |
1352 | ||
1353 | dsize = le16_to_cpu(new_de->key_size); | |
fa3cacf5 | 1354 | asize = ALIGN(SIZEOF_RESIDENT + dsize, 8); |
82cae269 KK |
1355 | |
1356 | attr->type = ATTR_NAME; | |
1357 | attr->size = cpu_to_le32(asize); | |
1358 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1359 | attr->res.flags = RESIDENT_FLAG_INDEXED; | |
1360 | attr->id = cpu_to_le16(aid++); | |
1361 | attr->res.data_size = cpu_to_le32(dsize); | |
1362 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), fname, dsize); | |
1363 | ||
1364 | attr = Add2Ptr(attr, asize); | |
1365 | ||
1366 | if (security_id == SECURITY_ID_INVALID) { | |
e8b8e97f | 1367 | /* Insert security attribute. */ |
fa3cacf5 | 1368 | asize = SIZEOF_RESIDENT + ALIGN(sd_size, 8); |
82cae269 KK |
1369 | |
1370 | attr->type = ATTR_SECURE; | |
1371 | attr->size = cpu_to_le32(asize); | |
1372 | attr->id = cpu_to_le16(aid++); | |
1373 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1374 | attr->res.data_size = cpu_to_le32(sd_size); | |
1375 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), sd, sd_size); | |
1376 | ||
1377 | attr = Add2Ptr(attr, asize); | |
1378 | } | |
1379 | ||
78ab59fe | 1380 | attr->id = cpu_to_le16(aid++); |
82cae269 KK |
1381 | if (fa & FILE_ATTRIBUTE_DIRECTORY) { |
1382 | /* | |
e8b8e97f KA |
1383 | * Regular directory or symlink to directory. |
1384 | * Create root attribute. | |
82cae269 KK |
1385 | */ |
1386 | dsize = sizeof(struct INDEX_ROOT) + sizeof(struct NTFS_DE); | |
1387 | asize = sizeof(I30_NAME) + SIZEOF_RESIDENT + dsize; | |
1388 | ||
1389 | attr->type = ATTR_ROOT; | |
1390 | attr->size = cpu_to_le32(asize); | |
82cae269 KK |
1391 | |
1392 | attr->name_len = ARRAY_SIZE(I30_NAME); | |
1393 | attr->name_off = SIZEOF_RESIDENT_LE; | |
1394 | attr->res.data_off = | |
1395 | cpu_to_le16(sizeof(I30_NAME) + SIZEOF_RESIDENT); | |
1396 | attr->res.data_size = cpu_to_le32(dsize); | |
1397 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), I30_NAME, | |
1398 | sizeof(I30_NAME)); | |
1399 | ||
1400 | root = Add2Ptr(attr, sizeof(I30_NAME) + SIZEOF_RESIDENT); | |
1401 | memcpy(root, dir_root, offsetof(struct INDEX_ROOT, ihdr)); | |
1402 | root->ihdr.de_off = | |
1403 | cpu_to_le32(sizeof(struct INDEX_HDR)); // 0x10 | |
1404 | root->ihdr.used = cpu_to_le32(sizeof(struct INDEX_HDR) + | |
1405 | sizeof(struct NTFS_DE)); | |
1406 | root->ihdr.total = root->ihdr.used; | |
1407 | ||
1408 | e = Add2Ptr(root, sizeof(struct INDEX_ROOT)); | |
1409 | e->size = cpu_to_le16(sizeof(struct NTFS_DE)); | |
1410 | e->flags = NTFS_IE_LAST; | |
1411 | } else if (S_ISLNK(mode)) { | |
1412 | /* | |
e8b8e97f KA |
1413 | * Symlink to file. |
1414 | * Create empty resident data attribute. | |
82cae269 KK |
1415 | */ |
1416 | asize = SIZEOF_RESIDENT; | |
1417 | ||
e8b8e97f | 1418 | /* Insert empty ATTR_DATA */ |
82cae269 KK |
1419 | attr->type = ATTR_DATA; |
1420 | attr->size = cpu_to_le32(SIZEOF_RESIDENT); | |
82cae269 KK |
1421 | attr->name_off = SIZEOF_RESIDENT_LE; |
1422 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
78ab59fe | 1423 | } else if (S_ISREG(mode)) { |
82cae269 | 1424 | /* |
78ab59fe | 1425 | * Regular file. Create empty non resident data attribute. |
82cae269 KK |
1426 | */ |
1427 | attr->type = ATTR_DATA; | |
78ab59fe KK |
1428 | attr->non_res = 1; |
1429 | attr->nres.evcn = cpu_to_le64(-1ll); | |
1430 | if (fa & FILE_ATTRIBUTE_SPARSE_FILE) { | |
1431 | attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8); | |
1432 | attr->name_off = SIZEOF_NONRESIDENT_EX_LE; | |
1433 | attr->flags = ATTR_FLAG_SPARSED; | |
1434 | asize = SIZEOF_NONRESIDENT_EX + 8; | |
1435 | } else if (fa & FILE_ATTRIBUTE_COMPRESSED) { | |
1436 | attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8); | |
1437 | attr->name_off = SIZEOF_NONRESIDENT_EX_LE; | |
1438 | attr->flags = ATTR_FLAG_COMPRESSED; | |
1439 | attr->nres.c_unit = COMPRESSION_UNIT; | |
1440 | asize = SIZEOF_NONRESIDENT_EX + 8; | |
82cae269 | 1441 | } else { |
78ab59fe KK |
1442 | attr->size = cpu_to_le32(SIZEOF_NONRESIDENT + 8); |
1443 | attr->name_off = SIZEOF_NONRESIDENT_LE; | |
1444 | asize = SIZEOF_NONRESIDENT + 8; | |
82cae269 | 1445 | } |
78ab59fe KK |
1446 | attr->nres.run_off = attr->name_off; |
1447 | } else { | |
1448 | /* | |
1449 | * Node. Create empty resident data attribute. | |
1450 | */ | |
1451 | attr->type = ATTR_DATA; | |
1452 | attr->size = cpu_to_le32(SIZEOF_RESIDENT); | |
1453 | attr->name_off = SIZEOF_RESIDENT_LE; | |
1454 | if (fa & FILE_ATTRIBUTE_SPARSE_FILE) | |
1455 | attr->flags = ATTR_FLAG_SPARSED; | |
1456 | else if (fa & FILE_ATTRIBUTE_COMPRESSED) | |
1457 | attr->flags = ATTR_FLAG_COMPRESSED; | |
1458 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1459 | asize = SIZEOF_RESIDENT; | |
1460 | ni->ni_flags |= NI_FLAG_RESIDENT; | |
82cae269 KK |
1461 | } |
1462 | ||
1463 | if (S_ISDIR(mode)) { | |
1464 | ni->ni_flags |= NI_FLAG_DIR; | |
1465 | err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30); | |
1466 | if (err) | |
1467 | goto out4; | |
1468 | } else if (S_ISLNK(mode)) { | |
1469 | rp = ntfs_create_reparse_buffer(sbi, symname, size, &nsize); | |
1470 | ||
1471 | if (IS_ERR(rp)) { | |
1472 | err = PTR_ERR(rp); | |
1473 | rp = NULL; | |
1474 | goto out4; | |
1475 | } | |
1476 | ||
1477 | /* | |
e8b8e97f | 1478 | * Insert ATTR_REPARSE. |
82cae269 KK |
1479 | */ |
1480 | attr = Add2Ptr(attr, asize); | |
1481 | attr->type = ATTR_REPARSE; | |
1482 | attr->id = cpu_to_le16(aid++); | |
1483 | ||
e8b8e97f | 1484 | /* Resident or non resident? */ |
fa3cacf5 | 1485 | asize = ALIGN(SIZEOF_RESIDENT + nsize, 8); |
82cae269 KK |
1486 | t16 = PtrOffset(rec, attr); |
1487 | ||
14a98119 KK |
1488 | /* |
1489 | * Below function 'ntfs_save_wsl_perm' requires 0x78 bytes. | |
1490 | * It is good idea to keep extened attributes resident. | |
1491 | */ | |
78ab59fe | 1492 | if (asize + t16 + 0x78 + 8 > sbi->record_size) { |
82cae269 KK |
1493 | CLST alen; |
1494 | CLST clst = bytes_to_cluster(sbi, nsize); | |
1495 | ||
e8b8e97f | 1496 | /* Bytes per runs. */ |
82cae269 KK |
1497 | t16 = sbi->record_size - t16 - SIZEOF_NONRESIDENT; |
1498 | ||
1499 | attr->non_res = 1; | |
1500 | attr->nres.evcn = cpu_to_le64(clst - 1); | |
1501 | attr->name_off = SIZEOF_NONRESIDENT_LE; | |
1502 | attr->nres.run_off = attr->name_off; | |
1503 | attr->nres.data_size = cpu_to_le64(nsize); | |
1504 | attr->nres.valid_size = attr->nres.data_size; | |
1505 | attr->nres.alloc_size = | |
1506 | cpu_to_le64(ntfs_up_cluster(sbi, nsize)); | |
1507 | ||
1508 | err = attr_allocate_clusters(sbi, &ni->file.run, 0, 0, | |
1509 | clst, NULL, 0, &alen, 0, | |
1510 | NULL); | |
1511 | if (err) | |
1512 | goto out5; | |
1513 | ||
1514 | err = run_pack(&ni->file.run, 0, clst, | |
1515 | Add2Ptr(attr, SIZEOF_NONRESIDENT), t16, | |
1516 | &vcn); | |
1517 | if (err < 0) | |
1518 | goto out5; | |
1519 | ||
1520 | if (vcn != clst) { | |
1521 | err = -EINVAL; | |
1522 | goto out5; | |
1523 | } | |
1524 | ||
fa3cacf5 | 1525 | asize = SIZEOF_NONRESIDENT + ALIGN(err, 8); |
82cae269 KK |
1526 | } else { |
1527 | attr->res.data_off = SIZEOF_RESIDENT_LE; | |
1528 | attr->res.data_size = cpu_to_le32(nsize); | |
1529 | memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), rp, nsize); | |
82cae269 KK |
1530 | nsize = 0; |
1531 | } | |
14a98119 KK |
1532 | /* Size of symlink equals the length of input string. */ |
1533 | inode->i_size = size; | |
82cae269 KK |
1534 | |
1535 | attr->size = cpu_to_le32(asize); | |
1536 | ||
1537 | err = ntfs_insert_reparse(sbi, IO_REPARSE_TAG_SYMLINK, | |
1538 | &new_de->ref); | |
1539 | if (err) | |
1540 | goto out5; | |
1541 | ||
1542 | rp_inserted = true; | |
1543 | } | |
1544 | ||
1545 | attr = Add2Ptr(attr, asize); | |
1546 | attr->type = ATTR_END; | |
1547 | ||
1548 | rec->used = cpu_to_le32(PtrOffset(rec, attr) + 8); | |
1549 | rec->next_attr_id = cpu_to_le16(aid); | |
1550 | ||
e8b8e97f | 1551 | /* Step 2: Add new name in index. */ |
78ab59fe | 1552 | err = indx_insert_entry(&dir_ni->dir, dir_ni, new_de, sbi, fnd, 0); |
82cae269 KK |
1553 | if (err) |
1554 | goto out6; | |
1555 | ||
d562e901 KK |
1556 | /* Unlock parent directory before ntfs_init_acl. */ |
1557 | ni_unlock(dir_ni); | |
1558 | ||
82cae269 KK |
1559 | inode->i_generation = le16_to_cpu(rec->seq); |
1560 | ||
1561 | dir->i_mtime = dir->i_ctime = inode->i_atime; | |
1562 | ||
1563 | if (S_ISDIR(mode)) { | |
82cae269 KK |
1564 | inode->i_op = &ntfs_dir_inode_operations; |
1565 | inode->i_fop = &ntfs_dir_operations; | |
1566 | } else if (S_ISLNK(mode)) { | |
1567 | inode->i_op = &ntfs_link_inode_operations; | |
1568 | inode->i_fop = NULL; | |
1569 | inode->i_mapping->a_ops = &ntfs_aops; | |
14a98119 KK |
1570 | inode->i_size = size; |
1571 | inode_nohighmem(inode); | |
82cae269 KK |
1572 | } else if (S_ISREG(mode)) { |
1573 | inode->i_op = &ntfs_file_inode_operations; | |
1574 | inode->i_fop = &ntfs_file_operations; | |
1575 | inode->i_mapping->a_ops = | |
1576 | is_compressed(ni) ? &ntfs_aops_cmpr : &ntfs_aops; | |
1577 | init_rwsem(&ni->file.run_lock); | |
1578 | } else { | |
1579 | inode->i_op = &ntfs_special_inode_operations; | |
1580 | init_special_inode(inode, mode, dev); | |
1581 | } | |
1582 | ||
1583 | #ifdef CONFIG_NTFS3_FS_POSIX_ACL | |
1584 | if (!S_ISLNK(mode) && (sb->s_flags & SB_POSIXACL)) { | |
1585 | err = ntfs_init_acl(mnt_userns, inode, dir); | |
1586 | if (err) | |
6c1ee4d3 | 1587 | goto out7; |
82cae269 KK |
1588 | } else |
1589 | #endif | |
1590 | { | |
1591 | inode->i_flags |= S_NOSEC; | |
1592 | } | |
1593 | ||
e8b8e97f | 1594 | /* Write non resident data. */ |
82cae269 | 1595 | if (nsize) { |
63544672 | 1596 | err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rp, nsize, 0); |
82cae269 KK |
1597 | if (err) |
1598 | goto out7; | |
1599 | } | |
1600 | ||
e8b8e97f KA |
1601 | /* |
1602 | * Call 'd_instantiate' after inode->i_op is set | |
1603 | * but before finish_open. | |
1604 | */ | |
82cae269 KK |
1605 | d_instantiate(dentry, inode); |
1606 | ||
1607 | ntfs_save_wsl_perm(inode); | |
82cae269 | 1608 | mark_inode_dirty(dir); |
78ab59fe | 1609 | mark_inode_dirty(inode); |
82cae269 | 1610 | |
e8b8e97f | 1611 | /* Normal exit. */ |
82cae269 KK |
1612 | goto out2; |
1613 | ||
1614 | out7: | |
1615 | ||
e8b8e97f | 1616 | /* Undo 'indx_insert_entry'. */ |
d562e901 | 1617 | ni_lock_dir(dir_ni); |
82cae269 KK |
1618 | indx_delete_entry(&dir_ni->dir, dir_ni, new_de + 1, |
1619 | le16_to_cpu(new_de->key_size), sbi); | |
d562e901 | 1620 | /* ni_unlock(dir_ni); will be called later. */ |
82cae269 KK |
1621 | out6: |
1622 | if (rp_inserted) | |
1623 | ntfs_remove_reparse(sbi, IO_REPARSE_TAG_SYMLINK, &new_de->ref); | |
1624 | ||
1625 | out5: | |
1626 | if (S_ISDIR(mode) || run_is_empty(&ni->file.run)) | |
1627 | goto out4; | |
1628 | ||
1629 | run_deallocate(sbi, &ni->file.run, false); | |
1630 | ||
1631 | out4: | |
1632 | clear_rec_inuse(rec); | |
1633 | clear_nlink(inode); | |
1634 | ni->mi.dirty = false; | |
1635 | discard_new_inode(inode); | |
1636 | out3: | |
1637 | ntfs_mark_rec_free(sbi, ino); | |
1638 | ||
1639 | out2: | |
1640 | __putname(new_de); | |
195c52bd | 1641 | kfree(rp); |
82cae269 KK |
1642 | |
1643 | out1: | |
d562e901 KK |
1644 | if (err) { |
1645 | ni_unlock(dir_ni); | |
82cae269 | 1646 | return ERR_PTR(err); |
d562e901 | 1647 | } |
82cae269 KK |
1648 | |
1649 | unlock_new_inode(inode); | |
1650 | ||
1651 | return inode; | |
1652 | } | |
1653 | ||
1654 | int ntfs_link_inode(struct inode *inode, struct dentry *dentry) | |
1655 | { | |
1656 | int err; | |
82cae269 | 1657 | struct ntfs_inode *ni = ntfs_i(inode); |
78ab59fe KK |
1658 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; |
1659 | struct NTFS_DE *de; | |
1660 | struct ATTR_FILE_NAME *de_name; | |
82cae269 | 1661 | |
e8b8e97f | 1662 | /* Allocate PATH_MAX bytes. */ |
78ab59fe KK |
1663 | de = __getname(); |
1664 | if (!de) | |
82cae269 KK |
1665 | return -ENOMEM; |
1666 | ||
78ab59fe KK |
1667 | /* Mark rw ntfs as dirty. It will be cleared at umount. */ |
1668 | ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); | |
82cae269 | 1669 | |
78ab59fe KK |
1670 | /* Construct 'de'. */ |
1671 | err = fill_name_de(sbi, de, &dentry->d_name, NULL); | |
82cae269 KK |
1672 | if (err) |
1673 | goto out; | |
1674 | ||
78ab59fe KK |
1675 | de_name = (struct ATTR_FILE_NAME *)(de + 1); |
1676 | /* Fill duplicate info. */ | |
1677 | de_name->dup.cr_time = de_name->dup.m_time = de_name->dup.c_time = | |
1678 | de_name->dup.a_time = kernel2nt(&inode->i_ctime); | |
1679 | de_name->dup.alloc_size = de_name->dup.data_size = | |
1680 | cpu_to_le64(inode->i_size); | |
1681 | de_name->dup.fa = ni->std_fa; | |
1682 | de_name->dup.ea_size = de_name->dup.reparse = 0; | |
82cae269 | 1683 | |
78ab59fe | 1684 | err = ni_add_name(ntfs_i(d_inode(dentry->d_parent)), ni, de); |
82cae269 | 1685 | out: |
78ab59fe | 1686 | __putname(de); |
82cae269 KK |
1687 | return err; |
1688 | } | |
1689 | ||
1690 | /* | |
1691 | * ntfs_unlink_inode | |
1692 | * | |
1693 | * inode_operations::unlink | |
1694 | * inode_operations::rmdir | |
1695 | */ | |
1696 | int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry) | |
1697 | { | |
1698 | int err; | |
78ab59fe | 1699 | struct ntfs_sb_info *sbi = dir->i_sb->s_fs_info; |
82cae269 KK |
1700 | struct inode *inode = d_inode(dentry); |
1701 | struct ntfs_inode *ni = ntfs_i(inode); | |
82cae269 | 1702 | struct ntfs_inode *dir_ni = ntfs_i(dir); |
78ab59fe KK |
1703 | struct NTFS_DE *de, *de2 = NULL; |
1704 | int undo_remove; | |
82cae269 | 1705 | |
78ab59fe | 1706 | if (ntfs_is_meta_file(sbi, ni->mi.rno)) |
82cae269 KK |
1707 | return -EINVAL; |
1708 | ||
78ab59fe KK |
1709 | /* Allocate PATH_MAX bytes. */ |
1710 | de = __getname(); | |
1711 | if (!de) | |
1712 | return -ENOMEM; | |
1713 | ||
82cae269 KK |
1714 | ni_lock(ni); |
1715 | ||
78ab59fe | 1716 | if (S_ISDIR(inode->i_mode) && !dir_is_empty(inode)) { |
82cae269 | 1717 | err = -ENOTEMPTY; |
78ab59fe | 1718 | goto out; |
82cae269 KK |
1719 | } |
1720 | ||
78ab59fe | 1721 | err = fill_name_de(sbi, de, &dentry->d_name, NULL); |
82cae269 | 1722 | if (err < 0) |
78ab59fe | 1723 | goto out; |
82cae269 | 1724 | |
78ab59fe KK |
1725 | undo_remove = 0; |
1726 | err = ni_remove_name(dir_ni, ni, de, &de2, &undo_remove); | |
82cae269 | 1727 | |
78ab59fe | 1728 | if (!err) { |
82cae269 | 1729 | drop_nlink(inode); |
78ab59fe KK |
1730 | dir->i_mtime = dir->i_ctime = current_time(dir); |
1731 | mark_inode_dirty(dir); | |
1732 | inode->i_ctime = dir->i_ctime; | |
1733 | if (inode->i_nlink) | |
1734 | mark_inode_dirty(inode); | |
1735 | } else if (!ni_remove_name_undo(dir_ni, ni, de, de2, undo_remove)) { | |
82cae269 | 1736 | make_bad_inode(inode); |
78ab59fe KK |
1737 | ntfs_inode_err(inode, "failed to undo unlink"); |
1738 | ntfs_set_state(sbi, NTFS_DIRTY_ERROR); | |
1739 | } else { | |
1740 | if (ni_is_dirty(dir)) | |
1741 | mark_inode_dirty(dir); | |
1742 | if (ni_is_dirty(inode)) | |
1743 | mark_inode_dirty(inode); | |
82cae269 KK |
1744 | } |
1745 | ||
78ab59fe | 1746 | out: |
82cae269 | 1747 | ni_unlock(ni); |
78ab59fe | 1748 | __putname(de); |
82cae269 KK |
1749 | return err; |
1750 | } | |
1751 | ||
1752 | void ntfs_evict_inode(struct inode *inode) | |
1753 | { | |
1754 | truncate_inode_pages_final(&inode->i_data); | |
1755 | ||
1756 | if (inode->i_nlink) | |
1757 | _ni_write_inode(inode, inode_needs_sync(inode)); | |
1758 | ||
1759 | invalidate_inode_buffers(inode); | |
1760 | clear_inode(inode); | |
1761 | ||
1762 | ni_clear(ntfs_i(inode)); | |
1763 | } | |
1764 | ||
1765 | static noinline int ntfs_readlink_hlp(struct inode *inode, char *buffer, | |
1766 | int buflen) | |
1767 | { | |
4dbe8e44 | 1768 | int i, err = -EINVAL; |
82cae269 KK |
1769 | struct ntfs_inode *ni = ntfs_i(inode); |
1770 | struct super_block *sb = inode->i_sb; | |
1771 | struct ntfs_sb_info *sbi = sb->s_fs_info; | |
4dbe8e44 KK |
1772 | u64 size; |
1773 | u16 ulen = 0; | |
82cae269 KK |
1774 | void *to_free = NULL; |
1775 | struct REPARSE_DATA_BUFFER *rp; | |
4dbe8e44 | 1776 | const __le16 *uname; |
82cae269 KK |
1777 | struct ATTRIB *attr; |
1778 | ||
e8b8e97f | 1779 | /* Reparse data present. Try to parse it. */ |
82cae269 KK |
1780 | static_assert(!offsetof(struct REPARSE_DATA_BUFFER, ReparseTag)); |
1781 | static_assert(sizeof(u32) == sizeof(rp->ReparseTag)); | |
1782 | ||
1783 | *buffer = 0; | |
1784 | ||
82cae269 | 1785 | attr = ni_find_attr(ni, NULL, NULL, ATTR_REPARSE, NULL, 0, NULL, NULL); |
4dbe8e44 | 1786 | if (!attr) |
82cae269 | 1787 | goto out; |
82cae269 KK |
1788 | |
1789 | if (!attr->non_res) { | |
4dbe8e44 KK |
1790 | rp = resident_data_ex(attr, sizeof(struct REPARSE_DATA_BUFFER)); |
1791 | if (!rp) | |
82cae269 | 1792 | goto out; |
4dbe8e44 | 1793 | size = le32_to_cpu(attr->res.data_size); |
82cae269 | 1794 | } else { |
4dbe8e44 KK |
1795 | size = le64_to_cpu(attr->nres.data_size); |
1796 | rp = NULL; | |
1797 | } | |
1798 | ||
1799 | if (size > sbi->reparse.max_size || size <= sizeof(u32)) | |
1800 | goto out; | |
1801 | ||
1802 | if (!rp) { | |
1803 | rp = kmalloc(size, GFP_NOFS); | |
82cae269 KK |
1804 | if (!rp) { |
1805 | err = -ENOMEM; | |
1806 | goto out; | |
1807 | } | |
1808 | to_free = rp; | |
4dbe8e44 KK |
1809 | /* Read into temporal buffer. */ |
1810 | err = ntfs_read_run_nb(sbi, &ni->file.run, 0, rp, size, NULL); | |
82cae269 KK |
1811 | if (err) |
1812 | goto out; | |
1813 | } | |
1814 | ||
e8b8e97f | 1815 | /* Microsoft Tag. */ |
82cae269 KK |
1816 | switch (rp->ReparseTag) { |
1817 | case IO_REPARSE_TAG_MOUNT_POINT: | |
e8b8e97f | 1818 | /* Mount points and junctions. */ |
82cae269 | 1819 | /* Can we use 'Rp->MountPointReparseBuffer.PrintNameLength'? */ |
4dbe8e44 KK |
1820 | if (size <= offsetof(struct REPARSE_DATA_BUFFER, |
1821 | MountPointReparseBuffer.PathBuffer)) | |
82cae269 | 1822 | goto out; |
4dbe8e44 KK |
1823 | uname = Add2Ptr(rp, |
1824 | offsetof(struct REPARSE_DATA_BUFFER, | |
1825 | MountPointReparseBuffer.PathBuffer) + | |
1826 | le16_to_cpu(rp->MountPointReparseBuffer | |
1827 | .PrintNameOffset)); | |
1828 | ulen = le16_to_cpu(rp->MountPointReparseBuffer.PrintNameLength); | |
82cae269 KK |
1829 | break; |
1830 | ||
1831 | case IO_REPARSE_TAG_SYMLINK: | |
1832 | /* FolderSymbolicLink */ | |
1833 | /* Can we use 'Rp->SymbolicLinkReparseBuffer.PrintNameLength'? */ | |
4dbe8e44 KK |
1834 | if (size <= offsetof(struct REPARSE_DATA_BUFFER, |
1835 | SymbolicLinkReparseBuffer.PathBuffer)) | |
82cae269 | 1836 | goto out; |
4dbe8e44 KK |
1837 | uname = Add2Ptr( |
1838 | rp, offsetof(struct REPARSE_DATA_BUFFER, | |
1839 | SymbolicLinkReparseBuffer.PathBuffer) + | |
1840 | le16_to_cpu(rp->SymbolicLinkReparseBuffer | |
1841 | .PrintNameOffset)); | |
1842 | ulen = le16_to_cpu( | |
82cae269 KK |
1843 | rp->SymbolicLinkReparseBuffer.PrintNameLength); |
1844 | break; | |
1845 | ||
1846 | case IO_REPARSE_TAG_CLOUD: | |
1847 | case IO_REPARSE_TAG_CLOUD_1: | |
1848 | case IO_REPARSE_TAG_CLOUD_2: | |
1849 | case IO_REPARSE_TAG_CLOUD_3: | |
1850 | case IO_REPARSE_TAG_CLOUD_4: | |
1851 | case IO_REPARSE_TAG_CLOUD_5: | |
1852 | case IO_REPARSE_TAG_CLOUD_6: | |
1853 | case IO_REPARSE_TAG_CLOUD_7: | |
1854 | case IO_REPARSE_TAG_CLOUD_8: | |
1855 | case IO_REPARSE_TAG_CLOUD_9: | |
1856 | case IO_REPARSE_TAG_CLOUD_A: | |
1857 | case IO_REPARSE_TAG_CLOUD_B: | |
1858 | case IO_REPARSE_TAG_CLOUD_C: | |
1859 | case IO_REPARSE_TAG_CLOUD_D: | |
1860 | case IO_REPARSE_TAG_CLOUD_E: | |
1861 | case IO_REPARSE_TAG_CLOUD_F: | |
1862 | err = sizeof("OneDrive") - 1; | |
1863 | if (err > buflen) | |
1864 | err = buflen; | |
1865 | memcpy(buffer, "OneDrive", err); | |
1866 | goto out; | |
1867 | ||
1868 | default: | |
1869 | if (IsReparseTagMicrosoft(rp->ReparseTag)) { | |
d3624466 | 1870 | /* Unknown Microsoft Tag. */ |
82cae269 KK |
1871 | goto out; |
1872 | } | |
1873 | if (!IsReparseTagNameSurrogate(rp->ReparseTag) || | |
4dbe8e44 | 1874 | size <= sizeof(struct REPARSE_POINT)) { |
82cae269 KK |
1875 | goto out; |
1876 | } | |
1877 | ||
e8b8e97f | 1878 | /* Users tag. */ |
4dbe8e44 KK |
1879 | uname = Add2Ptr(rp, sizeof(struct REPARSE_POINT)); |
1880 | ulen = le16_to_cpu(rp->ReparseDataLength) - | |
82cae269 KK |
1881 | sizeof(struct REPARSE_POINT); |
1882 | } | |
1883 | ||
e8b8e97f | 1884 | /* Convert nlen from bytes to UNICODE chars. */ |
4dbe8e44 | 1885 | ulen >>= 1; |
82cae269 | 1886 | |
e8b8e97f | 1887 | /* Check that name is available. */ |
4dbe8e44 | 1888 | if (!ulen || uname + ulen > (__le16 *)Add2Ptr(rp, size)) |
82cae269 KK |
1889 | goto out; |
1890 | ||
e8b8e97f | 1891 | /* If name is already zero terminated then truncate it now. */ |
4dbe8e44 KK |
1892 | if (!uname[ulen - 1]) |
1893 | ulen -= 1; | |
82cae269 | 1894 | |
4dbe8e44 | 1895 | err = ntfs_utf16_to_nls(sbi, uname, ulen, buffer, buflen); |
82cae269 KK |
1896 | |
1897 | if (err < 0) | |
1898 | goto out; | |
1899 | ||
e8b8e97f | 1900 | /* Translate Windows '\' into Linux '/'. */ |
82cae269 KK |
1901 | for (i = 0; i < err; i++) { |
1902 | if (buffer[i] == '\\') | |
1903 | buffer[i] = '/'; | |
1904 | } | |
1905 | ||
e8b8e97f | 1906 | /* Always set last zero. */ |
82cae269 KK |
1907 | buffer[err] = 0; |
1908 | out: | |
195c52bd | 1909 | kfree(to_free); |
82cae269 KK |
1910 | return err; |
1911 | } | |
1912 | ||
1913 | static const char *ntfs_get_link(struct dentry *de, struct inode *inode, | |
1914 | struct delayed_call *done) | |
1915 | { | |
1916 | int err; | |
1917 | char *ret; | |
1918 | ||
1919 | if (!de) | |
1920 | return ERR_PTR(-ECHILD); | |
1921 | ||
1922 | ret = kmalloc(PAGE_SIZE, GFP_NOFS); | |
1923 | if (!ret) | |
1924 | return ERR_PTR(-ENOMEM); | |
1925 | ||
1926 | err = ntfs_readlink_hlp(inode, ret, PAGE_SIZE); | |
1927 | if (err < 0) { | |
1928 | kfree(ret); | |
1929 | return ERR_PTR(err); | |
1930 | } | |
1931 | ||
1932 | set_delayed_call(done, kfree_link, ret); | |
1933 | ||
1934 | return ret; | |
1935 | } | |
1936 | ||
1937 | // clang-format off | |
1938 | const struct inode_operations ntfs_link_inode_operations = { | |
1939 | .get_link = ntfs_get_link, | |
1940 | .setattr = ntfs3_setattr, | |
1941 | .listxattr = ntfs_listxattr, | |
1942 | .permission = ntfs_permission, | |
1943 | .get_acl = ntfs_get_acl, | |
1944 | .set_acl = ntfs_set_acl, | |
1945 | }; | |
1946 | ||
1947 | const struct address_space_operations ntfs_aops = { | |
f132ab7d | 1948 | .read_folio = ntfs_read_folio, |
82cae269 KK |
1949 | .readahead = ntfs_readahead, |
1950 | .writepage = ntfs_writepage, | |
1951 | .writepages = ntfs_writepages, | |
1952 | .write_begin = ntfs_write_begin, | |
1953 | .write_end = ntfs_write_end, | |
1954 | .direct_IO = ntfs_direct_IO, | |
1955 | .bmap = ntfs_bmap, | |
e621900a | 1956 | .dirty_folio = block_dirty_folio, |
724bbe49 | 1957 | .invalidate_folio = block_invalidate_folio, |
82cae269 KK |
1958 | }; |
1959 | ||
1960 | const struct address_space_operations ntfs_aops_cmpr = { | |
f132ab7d | 1961 | .read_folio = ntfs_read_folio, |
82cae269 KK |
1962 | .readahead = ntfs_readahead, |
1963 | }; | |
1964 | // clang-format on |