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