Commit | Line | Data |
---|---|---|
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> | |
b5322eb1 | 11 | #include <linux/kernel.h> |
82cae269 KK |
12 | |
13 | #include "debug.h" | |
14 | #include "ntfs.h" | |
15 | #include "ntfs_fs.h" | |
16 | ||
17 | // clang-format off | |
18 | const struct cpu_str NAME_MFT = { | |
19 | 4, 0, { '$', 'M', 'F', 'T' }, | |
20 | }; | |
21 | const struct cpu_str NAME_MIRROR = { | |
22 | 8, 0, { '$', 'M', 'F', 'T', 'M', 'i', 'r', 'r' }, | |
23 | }; | |
24 | const struct cpu_str NAME_LOGFILE = { | |
25 | 8, 0, { '$', 'L', 'o', 'g', 'F', 'i', 'l', 'e' }, | |
26 | }; | |
27 | const struct cpu_str NAME_VOLUME = { | |
28 | 7, 0, { '$', 'V', 'o', 'l', 'u', 'm', 'e' }, | |
29 | }; | |
30 | const struct cpu_str NAME_ATTRDEF = { | |
31 | 8, 0, { '$', 'A', 't', 't', 'r', 'D', 'e', 'f' }, | |
32 | }; | |
33 | const struct cpu_str NAME_ROOT = { | |
34 | 1, 0, { '.' }, | |
35 | }; | |
36 | const struct cpu_str NAME_BITMAP = { | |
37 | 7, 0, { '$', 'B', 'i', 't', 'm', 'a', 'p' }, | |
38 | }; | |
39 | const struct cpu_str NAME_BOOT = { | |
40 | 5, 0, { '$', 'B', 'o', 'o', 't' }, | |
41 | }; | |
42 | const struct cpu_str NAME_BADCLUS = { | |
43 | 8, 0, { '$', 'B', 'a', 'd', 'C', 'l', 'u', 's' }, | |
44 | }; | |
45 | const struct cpu_str NAME_QUOTA = { | |
46 | 6, 0, { '$', 'Q', 'u', 'o', 't', 'a' }, | |
47 | }; | |
48 | const struct cpu_str NAME_SECURE = { | |
49 | 7, 0, { '$', 'S', 'e', 'c', 'u', 'r', 'e' }, | |
50 | }; | |
51 | const struct cpu_str NAME_UPCASE = { | |
52 | 7, 0, { '$', 'U', 'p', 'C', 'a', 's', 'e' }, | |
53 | }; | |
54 | const struct cpu_str NAME_EXTEND = { | |
55 | 7, 0, { '$', 'E', 'x', 't', 'e', 'n', 'd' }, | |
56 | }; | |
57 | const struct cpu_str NAME_OBJID = { | |
58 | 6, 0, { '$', 'O', 'b', 'j', 'I', 'd' }, | |
59 | }; | |
60 | const struct cpu_str NAME_REPARSE = { | |
61 | 8, 0, { '$', 'R', 'e', 'p', 'a', 'r', 's', 'e' }, | |
62 | }; | |
63 | const struct cpu_str NAME_USNJRNL = { | |
64 | 8, 0, { '$', 'U', 's', 'n', 'J', 'r', 'n', 'l' }, | |
65 | }; | |
66 | const __le16 BAD_NAME[4] = { | |
67 | cpu_to_le16('$'), cpu_to_le16('B'), cpu_to_le16('a'), cpu_to_le16('d'), | |
68 | }; | |
69 | const __le16 I30_NAME[4] = { | |
70 | cpu_to_le16('$'), cpu_to_le16('I'), cpu_to_le16('3'), cpu_to_le16('0'), | |
71 | }; | |
72 | const __le16 SII_NAME[4] = { | |
73 | cpu_to_le16('$'), cpu_to_le16('S'), cpu_to_le16('I'), cpu_to_le16('I'), | |
74 | }; | |
75 | const __le16 SDH_NAME[4] = { | |
76 | cpu_to_le16('$'), cpu_to_le16('S'), cpu_to_le16('D'), cpu_to_le16('H'), | |
77 | }; | |
78 | const __le16 SDS_NAME[4] = { | |
79 | cpu_to_le16('$'), cpu_to_le16('S'), cpu_to_le16('D'), cpu_to_le16('S'), | |
80 | }; | |
81 | const __le16 SO_NAME[2] = { | |
82 | cpu_to_le16('$'), cpu_to_le16('O'), | |
83 | }; | |
84 | const __le16 SQ_NAME[2] = { | |
85 | cpu_to_le16('$'), cpu_to_le16('Q'), | |
86 | }; | |
87 | const __le16 SR_NAME[2] = { | |
88 | cpu_to_le16('$'), cpu_to_le16('R'), | |
89 | }; | |
90 | ||
91 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
92 | const __le16 WOF_NAME[17] = { | |
93 | cpu_to_le16('W'), cpu_to_le16('o'), cpu_to_le16('f'), cpu_to_le16('C'), | |
94 | cpu_to_le16('o'), cpu_to_le16('m'), cpu_to_le16('p'), cpu_to_le16('r'), | |
95 | cpu_to_le16('e'), cpu_to_le16('s'), cpu_to_le16('s'), cpu_to_le16('e'), | |
96 | cpu_to_le16('d'), cpu_to_le16('D'), cpu_to_le16('a'), cpu_to_le16('t'), | |
97 | cpu_to_le16('a'), | |
98 | }; | |
99 | #endif | |
100 | ||
1d07a9df DP |
101 | static const __le16 CON_NAME[3] = { |
102 | cpu_to_le16('C'), cpu_to_le16('O'), cpu_to_le16('N'), | |
103 | }; | |
104 | ||
105 | static const __le16 NUL_NAME[3] = { | |
106 | cpu_to_le16('N'), cpu_to_le16('U'), cpu_to_le16('L'), | |
107 | }; | |
108 | ||
109 | static const __le16 AUX_NAME[3] = { | |
110 | cpu_to_le16('A'), cpu_to_le16('U'), cpu_to_le16('X'), | |
111 | }; | |
112 | ||
113 | static const __le16 PRN_NAME[3] = { | |
114 | cpu_to_le16('P'), cpu_to_le16('R'), cpu_to_le16('N'), | |
115 | }; | |
116 | ||
117 | static const __le16 COM_NAME[3] = { | |
118 | cpu_to_le16('C'), cpu_to_le16('O'), cpu_to_le16('M'), | |
119 | }; | |
120 | ||
121 | static const __le16 LPT_NAME[3] = { | |
122 | cpu_to_le16('L'), cpu_to_le16('P'), cpu_to_le16('T'), | |
123 | }; | |
124 | ||
82cae269 KK |
125 | // clang-format on |
126 | ||
127 | /* | |
e8b8e97f | 128 | * ntfs_fix_pre_write - Insert fixups into @rhdr before writing to disk. |
82cae269 KK |
129 | */ |
130 | bool ntfs_fix_pre_write(struct NTFS_RECORD_HEADER *rhdr, size_t bytes) | |
131 | { | |
132 | u16 *fixup, *ptr; | |
133 | u16 sample; | |
134 | u16 fo = le16_to_cpu(rhdr->fix_off); | |
135 | u16 fn = le16_to_cpu(rhdr->fix_num); | |
136 | ||
137 | if ((fo & 1) || fo + fn * sizeof(short) > SECTOR_SIZE || !fn-- || | |
138 | fn * SECTOR_SIZE > bytes) { | |
139 | return false; | |
140 | } | |
141 | ||
e8b8e97f | 142 | /* Get fixup pointer. */ |
82cae269 KK |
143 | fixup = Add2Ptr(rhdr, fo); |
144 | ||
145 | if (*fixup >= 0x7FFF) | |
146 | *fixup = 1; | |
147 | else | |
148 | *fixup += 1; | |
149 | ||
150 | sample = *fixup; | |
151 | ||
152 | ptr = Add2Ptr(rhdr, SECTOR_SIZE - sizeof(short)); | |
153 | ||
154 | while (fn--) { | |
155 | *++fixup = *ptr; | |
156 | *ptr = sample; | |
157 | ptr += SECTOR_SIZE / sizeof(short); | |
158 | } | |
159 | return true; | |
160 | } | |
161 | ||
162 | /* | |
e8b8e97f | 163 | * ntfs_fix_post_read - Remove fixups after reading from disk. |
82cae269 | 164 | * |
e8b8e97f | 165 | * Return: < 0 if error, 0 if ok, 1 if need to update fixups. |
82cae269 KK |
166 | */ |
167 | int ntfs_fix_post_read(struct NTFS_RECORD_HEADER *rhdr, size_t bytes, | |
168 | bool simple) | |
169 | { | |
170 | int ret; | |
171 | u16 *fixup, *ptr; | |
172 | u16 sample, fo, fn; | |
173 | ||
174 | fo = le16_to_cpu(rhdr->fix_off); | |
175 | fn = simple ? ((bytes >> SECTOR_SHIFT) + 1) | |
176 | : le16_to_cpu(rhdr->fix_num); | |
177 | ||
e8b8e97f | 178 | /* Check errors. */ |
82cae269 KK |
179 | if ((fo & 1) || fo + fn * sizeof(short) > SECTOR_SIZE || !fn-- || |
180 | fn * SECTOR_SIZE > bytes) { | |
e8b8e97f | 181 | return -EINVAL; /* Native chkntfs returns ok! */ |
82cae269 KK |
182 | } |
183 | ||
e8b8e97f | 184 | /* Get fixup pointer. */ |
82cae269 KK |
185 | fixup = Add2Ptr(rhdr, fo); |
186 | sample = *fixup; | |
187 | ptr = Add2Ptr(rhdr, SECTOR_SIZE - sizeof(short)); | |
188 | ret = 0; | |
189 | ||
190 | while (fn--) { | |
e8b8e97f | 191 | /* Test current word. */ |
82cae269 KK |
192 | if (*ptr != sample) { |
193 | /* Fixup does not match! Is it serious error? */ | |
194 | ret = -E_NTFS_FIXUP; | |
195 | } | |
196 | ||
e8b8e97f | 197 | /* Replace fixup. */ |
82cae269 KK |
198 | *ptr = *++fixup; |
199 | ptr += SECTOR_SIZE / sizeof(short); | |
200 | } | |
201 | ||
202 | return ret; | |
203 | } | |
204 | ||
205 | /* | |
e8b8e97f | 206 | * ntfs_extend_init - Load $Extend file. |
82cae269 KK |
207 | */ |
208 | int ntfs_extend_init(struct ntfs_sb_info *sbi) | |
209 | { | |
210 | int err; | |
211 | struct super_block *sb = sbi->sb; | |
212 | struct inode *inode, *inode2; | |
213 | struct MFT_REF ref; | |
214 | ||
215 | if (sbi->volume.major_ver < 3) { | |
216 | ntfs_notice(sb, "Skip $Extend 'cause NTFS version"); | |
217 | return 0; | |
218 | } | |
219 | ||
220 | ref.low = cpu_to_le32(MFT_REC_EXTEND); | |
221 | ref.high = 0; | |
222 | ref.seq = cpu_to_le16(MFT_REC_EXTEND); | |
223 | inode = ntfs_iget5(sb, &ref, &NAME_EXTEND); | |
224 | if (IS_ERR(inode)) { | |
225 | err = PTR_ERR(inode); | |
226 | ntfs_err(sb, "Failed to load $Extend."); | |
227 | inode = NULL; | |
228 | goto out; | |
229 | } | |
230 | ||
e8b8e97f | 231 | /* If ntfs_iget5() reads from disk it never returns bad inode. */ |
82cae269 KK |
232 | if (!S_ISDIR(inode->i_mode)) { |
233 | err = -EINVAL; | |
234 | goto out; | |
235 | } | |
236 | ||
237 | /* Try to find $ObjId */ | |
238 | inode2 = dir_search_u(inode, &NAME_OBJID, NULL); | |
239 | if (inode2 && !IS_ERR(inode2)) { | |
240 | if (is_bad_inode(inode2)) { | |
241 | iput(inode2); | |
242 | } else { | |
243 | sbi->objid.ni = ntfs_i(inode2); | |
244 | sbi->objid_no = inode2->i_ino; | |
245 | } | |
246 | } | |
247 | ||
248 | /* Try to find $Quota */ | |
249 | inode2 = dir_search_u(inode, &NAME_QUOTA, NULL); | |
250 | if (inode2 && !IS_ERR(inode2)) { | |
251 | sbi->quota_no = inode2->i_ino; | |
252 | iput(inode2); | |
253 | } | |
254 | ||
255 | /* Try to find $Reparse */ | |
256 | inode2 = dir_search_u(inode, &NAME_REPARSE, NULL); | |
257 | if (inode2 && !IS_ERR(inode2)) { | |
258 | sbi->reparse.ni = ntfs_i(inode2); | |
259 | sbi->reparse_no = inode2->i_ino; | |
260 | } | |
261 | ||
262 | /* Try to find $UsnJrnl */ | |
263 | inode2 = dir_search_u(inode, &NAME_USNJRNL, NULL); | |
264 | if (inode2 && !IS_ERR(inode2)) { | |
265 | sbi->usn_jrnl_no = inode2->i_ino; | |
266 | iput(inode2); | |
267 | } | |
268 | ||
269 | err = 0; | |
270 | out: | |
271 | iput(inode); | |
272 | return err; | |
273 | } | |
274 | ||
275 | int ntfs_loadlog_and_replay(struct ntfs_inode *ni, struct ntfs_sb_info *sbi) | |
276 | { | |
277 | int err = 0; | |
278 | struct super_block *sb = sbi->sb; | |
279 | bool initialized = false; | |
280 | struct MFT_REF ref; | |
281 | struct inode *inode; | |
282 | ||
e8b8e97f | 283 | /* Check for 4GB. */ |
82cae269 KK |
284 | if (ni->vfs_inode.i_size >= 0x100000000ull) { |
285 | ntfs_err(sb, "\x24LogFile is too big"); | |
286 | err = -EINVAL; | |
287 | goto out; | |
288 | } | |
289 | ||
290 | sbi->flags |= NTFS_FLAGS_LOG_REPLAYING; | |
291 | ||
292 | ref.low = cpu_to_le32(MFT_REC_MFT); | |
293 | ref.high = 0; | |
294 | ref.seq = cpu_to_le16(1); | |
295 | ||
296 | inode = ntfs_iget5(sb, &ref, NULL); | |
297 | ||
298 | if (IS_ERR(inode)) | |
299 | inode = NULL; | |
300 | ||
301 | if (!inode) { | |
e8b8e97f | 302 | /* Try to use MFT copy. */ |
82cae269 KK |
303 | u64 t64 = sbi->mft.lbo; |
304 | ||
305 | sbi->mft.lbo = sbi->mft.lbo2; | |
306 | inode = ntfs_iget5(sb, &ref, NULL); | |
307 | sbi->mft.lbo = t64; | |
308 | if (IS_ERR(inode)) | |
309 | inode = NULL; | |
310 | } | |
311 | ||
312 | if (!inode) { | |
313 | err = -EINVAL; | |
314 | ntfs_err(sb, "Failed to load $MFT."); | |
315 | goto out; | |
316 | } | |
317 | ||
318 | sbi->mft.ni = ntfs_i(inode); | |
319 | ||
e8b8e97f | 320 | /* LogFile should not contains attribute list. */ |
82cae269 KK |
321 | err = ni_load_all_mi(sbi->mft.ni); |
322 | if (!err) | |
323 | err = log_replay(ni, &initialized); | |
324 | ||
325 | iput(inode); | |
326 | sbi->mft.ni = NULL; | |
327 | ||
328 | sync_blockdev(sb->s_bdev); | |
329 | invalidate_bdev(sb->s_bdev); | |
330 | ||
331 | if (sbi->flags & NTFS_FLAGS_NEED_REPLAY) { | |
332 | err = 0; | |
333 | goto out; | |
334 | } | |
335 | ||
336 | if (sb_rdonly(sb) || !initialized) | |
337 | goto out; | |
338 | ||
d3624466 | 339 | /* Fill LogFile by '-1' if it is initialized. */ |
82cae269 KK |
340 | err = ntfs_bio_fill_1(sbi, &ni->file.run); |
341 | ||
342 | out: | |
343 | sbi->flags &= ~NTFS_FLAGS_LOG_REPLAYING; | |
344 | ||
345 | return err; | |
346 | } | |
347 | ||
82cae269 | 348 | /* |
e8b8e97f | 349 | * ntfs_look_for_free_space - Look for a free space in bitmap. |
82cae269 KK |
350 | */ |
351 | int ntfs_look_for_free_space(struct ntfs_sb_info *sbi, CLST lcn, CLST len, | |
352 | CLST *new_lcn, CLST *new_len, | |
353 | enum ALLOCATE_OPT opt) | |
354 | { | |
355 | int err; | |
edb853ff | 356 | CLST alen; |
82cae269 | 357 | struct super_block *sb = sbi->sb; |
78ab59fe | 358 | size_t alcn, zlen, zeroes, zlcn, zlen2, ztrim, new_zlen; |
82cae269 KK |
359 | struct wnd_bitmap *wnd = &sbi->used.bitmap; |
360 | ||
361 | down_write_nested(&wnd->rw_lock, BITMAP_MUTEX_CLUSTERS); | |
362 | if (opt & ALLOCATE_MFT) { | |
82cae269 KK |
363 | zlen = wnd_zone_len(wnd); |
364 | ||
365 | if (!zlen) { | |
366 | err = ntfs_refresh_zone(sbi); | |
367 | if (err) | |
edb853ff KA |
368 | goto up_write; |
369 | ||
82cae269 | 370 | zlen = wnd_zone_len(wnd); |
78ab59fe | 371 | } |
82cae269 | 372 | |
78ab59fe KK |
373 | if (!zlen) { |
374 | ntfs_err(sbi->sb, "no free space to extend mft"); | |
edb853ff KA |
375 | err = -ENOSPC; |
376 | goto up_write; | |
82cae269 KK |
377 | } |
378 | ||
379 | lcn = wnd_zone_bit(wnd); | |
6e3331ee | 380 | alen = min_t(CLST, len, zlen); |
82cae269 KK |
381 | |
382 | wnd_zone_set(wnd, lcn + alen, zlen - alen); | |
383 | ||
384 | err = wnd_set_used(wnd, lcn, alen); | |
edb853ff KA |
385 | if (err) |
386 | goto up_write; | |
387 | ||
78ab59fe | 388 | alcn = lcn; |
edb853ff | 389 | goto space_found; |
82cae269 | 390 | } |
82cae269 KK |
391 | /* |
392 | * 'Cause cluster 0 is always used this value means that we should use | |
e8b8e97f | 393 | * cached value of 'next_free_lcn' to improve performance. |
82cae269 KK |
394 | */ |
395 | if (!lcn) | |
396 | lcn = sbi->used.next_free_lcn; | |
397 | ||
398 | if (lcn >= wnd->nbits) | |
399 | lcn = 0; | |
400 | ||
78ab59fe KK |
401 | alen = wnd_find(wnd, len, lcn, BITMAP_FIND_MARK_AS_USED, &alcn); |
402 | if (alen) | |
edb853ff | 403 | goto space_found; |
82cae269 | 404 | |
e8b8e97f | 405 | /* Try to use clusters from MftZone. */ |
82cae269 KK |
406 | zlen = wnd_zone_len(wnd); |
407 | zeroes = wnd_zeroes(wnd); | |
408 | ||
78ab59fe | 409 | /* Check too big request */ |
edb853ff KA |
410 | if (len > zeroes + zlen || zlen <= NTFS_MIN_MFT_ZONE) { |
411 | err = -ENOSPC; | |
412 | goto up_write; | |
413 | } | |
82cae269 | 414 | |
e8b8e97f | 415 | /* How many clusters to cat from zone. */ |
82cae269 KK |
416 | zlcn = wnd_zone_bit(wnd); |
417 | zlen2 = zlen >> 1; | |
b5322eb1 KA |
418 | ztrim = clamp_val(len, zlen2, zlen); |
419 | new_zlen = max_t(size_t, zlen - ztrim, NTFS_MIN_MFT_ZONE); | |
82cae269 KK |
420 | |
421 | wnd_zone_set(wnd, zlcn, new_zlen); | |
422 | ||
e8b8e97f | 423 | /* Allocate continues clusters. */ |
78ab59fe KK |
424 | alen = wnd_find(wnd, len, 0, |
425 | BITMAP_FIND_MARK_AS_USED | BITMAP_FIND_FULL, &alcn); | |
edb853ff | 426 | if (!alen) { |
78ab59fe | 427 | err = -ENOSPC; |
edb853ff | 428 | goto up_write; |
78ab59fe | 429 | } |
82cae269 | 430 | |
edb853ff KA |
431 | space_found: |
432 | err = 0; | |
433 | *new_len = alen; | |
434 | *new_lcn = alcn; | |
435 | ||
436 | ntfs_unmap_meta(sb, alcn, alen); | |
437 | ||
438 | /* Set hint for next requests. */ | |
439 | if (!(opt & ALLOCATE_MFT)) | |
440 | sbi->used.next_free_lcn = alcn + alen; | |
441 | up_write: | |
82cae269 KK |
442 | up_write(&wnd->rw_lock); |
443 | return err; | |
444 | } | |
445 | ||
910013f7 KK |
446 | /* |
447 | * ntfs_check_for_free_space | |
448 | * | |
449 | * Check if it is possible to allocate 'clen' clusters and 'mlen' Mft records | |
450 | */ | |
451 | bool ntfs_check_for_free_space(struct ntfs_sb_info *sbi, CLST clen, CLST mlen) | |
452 | { | |
453 | size_t free, zlen, avail; | |
454 | struct wnd_bitmap *wnd; | |
455 | ||
456 | wnd = &sbi->used.bitmap; | |
457 | down_read_nested(&wnd->rw_lock, BITMAP_MUTEX_CLUSTERS); | |
458 | free = wnd_zeroes(wnd); | |
6f80ed14 | 459 | zlen = min_t(size_t, NTFS_MIN_MFT_ZONE, wnd_zone_len(wnd)); |
910013f7 KK |
460 | up_read(&wnd->rw_lock); |
461 | ||
462 | if (free < zlen + clen) | |
463 | return false; | |
464 | ||
465 | avail = free - (zlen + clen); | |
466 | ||
467 | wnd = &sbi->mft.bitmap; | |
468 | down_read_nested(&wnd->rw_lock, BITMAP_MUTEX_MFT); | |
469 | free = wnd_zeroes(wnd); | |
470 | zlen = wnd_zone_len(wnd); | |
471 | up_read(&wnd->rw_lock); | |
472 | ||
473 | if (free >= zlen + mlen) | |
474 | return true; | |
475 | ||
476 | return avail >= bytes_to_cluster(sbi, mlen << sbi->record_bits); | |
477 | } | |
478 | ||
82cae269 | 479 | /* |
e8b8e97f | 480 | * ntfs_extend_mft - Allocate additional MFT records. |
82cae269 | 481 | * |
e8b8e97f | 482 | * sbi->mft.bitmap is locked for write. |
82cae269 KK |
483 | * |
484 | * NOTE: recursive: | |
485 | * ntfs_look_free_mft -> | |
486 | * ntfs_extend_mft -> | |
487 | * attr_set_size -> | |
488 | * ni_insert_nonresident -> | |
489 | * ni_insert_attr -> | |
490 | * ni_ins_attr_ext -> | |
491 | * ntfs_look_free_mft -> | |
492 | * ntfs_extend_mft | |
e8b8e97f KA |
493 | * |
494 | * To avoid recursive always allocate space for two new MFT records | |
495 | * see attrib.c: "at least two MFT to avoid recursive loop". | |
82cae269 KK |
496 | */ |
497 | static int ntfs_extend_mft(struct ntfs_sb_info *sbi) | |
498 | { | |
499 | int err; | |
500 | struct ntfs_inode *ni = sbi->mft.ni; | |
501 | size_t new_mft_total; | |
502 | u64 new_mft_bytes, new_bitmap_bytes; | |
503 | struct ATTRIB *attr; | |
504 | struct wnd_bitmap *wnd = &sbi->mft.bitmap; | |
505 | ||
97a6815e | 506 | new_mft_total = ALIGN(wnd->nbits + NTFS_MFT_INCREASE_STEP, 128); |
82cae269 KK |
507 | new_mft_bytes = (u64)new_mft_total << sbi->record_bits; |
508 | ||
e8b8e97f | 509 | /* Step 1: Resize $MFT::DATA. */ |
82cae269 KK |
510 | down_write(&ni->file.run_lock); |
511 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, | |
512 | new_mft_bytes, NULL, false, &attr); | |
513 | ||
514 | if (err) { | |
515 | up_write(&ni->file.run_lock); | |
516 | goto out; | |
517 | } | |
518 | ||
519 | attr->nres.valid_size = attr->nres.data_size; | |
520 | new_mft_total = le64_to_cpu(attr->nres.alloc_size) >> sbi->record_bits; | |
521 | ni->mi.dirty = true; | |
522 | ||
e8b8e97f | 523 | /* Step 2: Resize $MFT::BITMAP. */ |
82cae269 KK |
524 | new_bitmap_bytes = bitmap_size(new_mft_total); |
525 | ||
526 | err = attr_set_size(ni, ATTR_BITMAP, NULL, 0, &sbi->mft.bitmap.run, | |
527 | new_bitmap_bytes, &new_bitmap_bytes, true, NULL); | |
528 | ||
e8b8e97f | 529 | /* Refresh MFT Zone if necessary. */ |
82cae269 KK |
530 | down_write_nested(&sbi->used.bitmap.rw_lock, BITMAP_MUTEX_CLUSTERS); |
531 | ||
532 | ntfs_refresh_zone(sbi); | |
533 | ||
534 | up_write(&sbi->used.bitmap.rw_lock); | |
535 | up_write(&ni->file.run_lock); | |
536 | ||
537 | if (err) | |
538 | goto out; | |
539 | ||
540 | err = wnd_extend(wnd, new_mft_total); | |
541 | ||
542 | if (err) | |
543 | goto out; | |
544 | ||
545 | ntfs_clear_mft_tail(sbi, sbi->mft.used, new_mft_total); | |
546 | ||
547 | err = _ni_write_inode(&ni->vfs_inode, 0); | |
548 | out: | |
549 | return err; | |
550 | } | |
551 | ||
552 | /* | |
e8b8e97f | 553 | * ntfs_look_free_mft - Look for a free MFT record. |
82cae269 KK |
554 | */ |
555 | int ntfs_look_free_mft(struct ntfs_sb_info *sbi, CLST *rno, bool mft, | |
556 | struct ntfs_inode *ni, struct mft_inode **mi) | |
557 | { | |
558 | int err = 0; | |
559 | size_t zbit, zlen, from, to, fr; | |
560 | size_t mft_total; | |
561 | struct MFT_REF ref; | |
562 | struct super_block *sb = sbi->sb; | |
563 | struct wnd_bitmap *wnd = &sbi->mft.bitmap; | |
564 | u32 ir; | |
565 | ||
566 | static_assert(sizeof(sbi->mft.reserved_bitmap) * 8 >= | |
567 | MFT_REC_FREE - MFT_REC_RESERVED); | |
568 | ||
569 | if (!mft) | |
570 | down_write_nested(&wnd->rw_lock, BITMAP_MUTEX_MFT); | |
571 | ||
572 | zlen = wnd_zone_len(wnd); | |
573 | ||
e8b8e97f | 574 | /* Always reserve space for MFT. */ |
82cae269 KK |
575 | if (zlen) { |
576 | if (mft) { | |
577 | zbit = wnd_zone_bit(wnd); | |
578 | *rno = zbit; | |
579 | wnd_zone_set(wnd, zbit + 1, zlen - 1); | |
580 | } | |
581 | goto found; | |
582 | } | |
583 | ||
e8b8e97f | 584 | /* No MFT zone. Find the nearest to '0' free MFT. */ |
82cae269 KK |
585 | if (!wnd_find(wnd, 1, MFT_REC_FREE, 0, &zbit)) { |
586 | /* Resize MFT */ | |
587 | mft_total = wnd->nbits; | |
588 | ||
589 | err = ntfs_extend_mft(sbi); | |
590 | if (!err) { | |
591 | zbit = mft_total; | |
592 | goto reserve_mft; | |
593 | } | |
594 | ||
595 | if (!mft || MFT_REC_FREE == sbi->mft.next_reserved) | |
596 | goto out; | |
597 | ||
598 | err = 0; | |
599 | ||
600 | /* | |
601 | * Look for free record reserved area [11-16) == | |
602 | * [MFT_REC_RESERVED, MFT_REC_FREE ) MFT bitmap always | |
e8b8e97f | 603 | * marks it as used. |
82cae269 KK |
604 | */ |
605 | if (!sbi->mft.reserved_bitmap) { | |
e8b8e97f | 606 | /* Once per session create internal bitmap for 5 bits. */ |
82cae269 KK |
607 | sbi->mft.reserved_bitmap = 0xFF; |
608 | ||
609 | ref.high = 0; | |
610 | for (ir = MFT_REC_RESERVED; ir < MFT_REC_FREE; ir++) { | |
611 | struct inode *i; | |
612 | struct ntfs_inode *ni; | |
613 | struct MFT_REC *mrec; | |
614 | ||
615 | ref.low = cpu_to_le32(ir); | |
616 | ref.seq = cpu_to_le16(ir); | |
617 | ||
618 | i = ntfs_iget5(sb, &ref, NULL); | |
619 | if (IS_ERR(i)) { | |
620 | next: | |
621 | ntfs_notice( | |
622 | sb, | |
623 | "Invalid reserved record %x", | |
624 | ref.low); | |
625 | continue; | |
626 | } | |
627 | if (is_bad_inode(i)) { | |
628 | iput(i); | |
629 | goto next; | |
630 | } | |
631 | ||
632 | ni = ntfs_i(i); | |
633 | ||
634 | mrec = ni->mi.mrec; | |
635 | ||
636 | if (!is_rec_base(mrec)) | |
637 | goto next; | |
638 | ||
639 | if (mrec->hard_links) | |
640 | goto next; | |
641 | ||
642 | if (!ni_std(ni)) | |
643 | goto next; | |
644 | ||
645 | if (ni_find_attr(ni, NULL, NULL, ATTR_NAME, | |
646 | NULL, 0, NULL, NULL)) | |
647 | goto next; | |
648 | ||
095d8ce6 | 649 | __clear_bit_le(ir - MFT_REC_RESERVED, |
82cae269 KK |
650 | &sbi->mft.reserved_bitmap); |
651 | } | |
652 | } | |
653 | ||
654 | /* Scan 5 bits for zero. Bit 0 == MFT_REC_RESERVED */ | |
095d8ce6 | 655 | zbit = find_next_zero_bit_le(&sbi->mft.reserved_bitmap, |
82cae269 KK |
656 | MFT_REC_FREE, MFT_REC_RESERVED); |
657 | if (zbit >= MFT_REC_FREE) { | |
658 | sbi->mft.next_reserved = MFT_REC_FREE; | |
659 | goto out; | |
660 | } | |
661 | ||
662 | zlen = 1; | |
663 | sbi->mft.next_reserved = zbit; | |
664 | } else { | |
665 | reserve_mft: | |
666 | zlen = zbit == MFT_REC_FREE ? (MFT_REC_USER - MFT_REC_FREE) : 4; | |
667 | if (zbit + zlen > wnd->nbits) | |
668 | zlen = wnd->nbits - zbit; | |
669 | ||
670 | while (zlen > 1 && !wnd_is_free(wnd, zbit, zlen)) | |
671 | zlen -= 1; | |
672 | ||
e8b8e97f | 673 | /* [zbit, zbit + zlen) will be used for MFT itself. */ |
82cae269 KK |
674 | from = sbi->mft.used; |
675 | if (from < zbit) | |
676 | from = zbit; | |
677 | to = zbit + zlen; | |
678 | if (from < to) { | |
679 | ntfs_clear_mft_tail(sbi, from, to); | |
680 | sbi->mft.used = to; | |
681 | } | |
682 | } | |
683 | ||
684 | if (mft) { | |
685 | *rno = zbit; | |
686 | zbit += 1; | |
687 | zlen -= 1; | |
688 | } | |
689 | ||
690 | wnd_zone_set(wnd, zbit, zlen); | |
691 | ||
692 | found: | |
693 | if (!mft) { | |
e8b8e97f | 694 | /* The request to get record for general purpose. */ |
82cae269 KK |
695 | if (sbi->mft.next_free < MFT_REC_USER) |
696 | sbi->mft.next_free = MFT_REC_USER; | |
697 | ||
698 | for (;;) { | |
699 | if (sbi->mft.next_free >= sbi->mft.bitmap.nbits) { | |
700 | } else if (!wnd_find(wnd, 1, MFT_REC_USER, 0, &fr)) { | |
701 | sbi->mft.next_free = sbi->mft.bitmap.nbits; | |
702 | } else { | |
703 | *rno = fr; | |
704 | sbi->mft.next_free = *rno + 1; | |
705 | break; | |
706 | } | |
707 | ||
708 | err = ntfs_extend_mft(sbi); | |
709 | if (err) | |
710 | goto out; | |
711 | } | |
712 | } | |
713 | ||
714 | if (ni && !ni_add_subrecord(ni, *rno, mi)) { | |
715 | err = -ENOMEM; | |
716 | goto out; | |
717 | } | |
718 | ||
e8b8e97f | 719 | /* We have found a record that are not reserved for next MFT. */ |
82cae269 KK |
720 | if (*rno >= MFT_REC_FREE) |
721 | wnd_set_used(wnd, *rno, 1); | |
722 | else if (*rno >= MFT_REC_RESERVED && sbi->mft.reserved_bitmap_inited) | |
095d8ce6 | 723 | __set_bit_le(*rno - MFT_REC_RESERVED, &sbi->mft.reserved_bitmap); |
82cae269 KK |
724 | |
725 | out: | |
726 | if (!mft) | |
727 | up_write(&wnd->rw_lock); | |
728 | ||
729 | return err; | |
730 | } | |
731 | ||
732 | /* | |
e8b8e97f | 733 | * ntfs_mark_rec_free - Mark record as free. |
071100ea | 734 | * is_mft - true if we are changing MFT |
82cae269 | 735 | */ |
071100ea | 736 | void ntfs_mark_rec_free(struct ntfs_sb_info *sbi, CLST rno, bool is_mft) |
82cae269 KK |
737 | { |
738 | struct wnd_bitmap *wnd = &sbi->mft.bitmap; | |
739 | ||
071100ea KK |
740 | if (!is_mft) |
741 | down_write_nested(&wnd->rw_lock, BITMAP_MUTEX_MFT); | |
82cae269 KK |
742 | if (rno >= wnd->nbits) |
743 | goto out; | |
744 | ||
745 | if (rno >= MFT_REC_FREE) { | |
746 | if (!wnd_is_used(wnd, rno, 1)) | |
747 | ntfs_set_state(sbi, NTFS_DIRTY_ERROR); | |
748 | else | |
749 | wnd_set_free(wnd, rno, 1); | |
750 | } else if (rno >= MFT_REC_RESERVED && sbi->mft.reserved_bitmap_inited) { | |
095d8ce6 | 751 | __clear_bit_le(rno - MFT_REC_RESERVED, &sbi->mft.reserved_bitmap); |
82cae269 KK |
752 | } |
753 | ||
754 | if (rno < wnd_zone_bit(wnd)) | |
755 | wnd_zone_set(wnd, rno, 1); | |
756 | else if (rno < sbi->mft.next_free && rno >= MFT_REC_USER) | |
757 | sbi->mft.next_free = rno; | |
758 | ||
759 | out: | |
071100ea KK |
760 | if (!is_mft) |
761 | up_write(&wnd->rw_lock); | |
82cae269 KK |
762 | } |
763 | ||
764 | /* | |
e8b8e97f | 765 | * ntfs_clear_mft_tail - Format empty records [from, to). |
82cae269 | 766 | * |
e8b8e97f | 767 | * sbi->mft.bitmap is locked for write. |
82cae269 KK |
768 | */ |
769 | int ntfs_clear_mft_tail(struct ntfs_sb_info *sbi, size_t from, size_t to) | |
770 | { | |
771 | int err; | |
772 | u32 rs; | |
773 | u64 vbo; | |
774 | struct runs_tree *run; | |
775 | struct ntfs_inode *ni; | |
776 | ||
777 | if (from >= to) | |
778 | return 0; | |
779 | ||
780 | rs = sbi->record_size; | |
781 | ni = sbi->mft.ni; | |
782 | run = &ni->file.run; | |
783 | ||
784 | down_read(&ni->file.run_lock); | |
785 | vbo = (u64)from * rs; | |
786 | for (; from < to; from++, vbo += rs) { | |
787 | struct ntfs_buffers nb; | |
788 | ||
789 | err = ntfs_get_bh(sbi, run, vbo, rs, &nb); | |
790 | if (err) | |
791 | goto out; | |
792 | ||
793 | err = ntfs_write_bh(sbi, &sbi->new_rec->rhdr, &nb, 0); | |
794 | nb_put(&nb); | |
795 | if (err) | |
796 | goto out; | |
797 | } | |
798 | ||
799 | out: | |
800 | sbi->mft.used = from; | |
801 | up_read(&ni->file.run_lock); | |
802 | return err; | |
803 | } | |
804 | ||
805 | /* | |
e8b8e97f | 806 | * ntfs_refresh_zone - Refresh MFT zone. |
82cae269 | 807 | * |
e8b8e97f KA |
808 | * sbi->used.bitmap is locked for rw. |
809 | * sbi->mft.bitmap is locked for write. | |
810 | * sbi->mft.ni->file.run_lock for write. | |
82cae269 KK |
811 | */ |
812 | int ntfs_refresh_zone(struct ntfs_sb_info *sbi) | |
813 | { | |
8335ebe1 | 814 | CLST lcn, vcn, len; |
82cae269 KK |
815 | size_t lcn_s, zlen; |
816 | struct wnd_bitmap *wnd = &sbi->used.bitmap; | |
817 | struct ntfs_inode *ni = sbi->mft.ni; | |
818 | ||
e8b8e97f | 819 | /* Do not change anything unless we have non empty MFT zone. */ |
82cae269 KK |
820 | if (wnd_zone_len(wnd)) |
821 | return 0; | |
822 | ||
82cae269 KK |
823 | vcn = bytes_to_cluster(sbi, |
824 | (u64)sbi->mft.bitmap.nbits << sbi->record_bits); | |
825 | ||
826 | if (!run_lookup_entry(&ni->file.run, vcn - 1, &lcn, &len, NULL)) | |
827 | lcn = SPARSE_LCN; | |
828 | ||
e8b8e97f | 829 | /* We should always find Last Lcn for MFT. */ |
82cae269 KK |
830 | if (lcn == SPARSE_LCN) |
831 | return -EINVAL; | |
832 | ||
833 | lcn_s = lcn + 1; | |
834 | ||
e8b8e97f | 835 | /* Try to allocate clusters after last MFT run. */ |
8335ebe1 | 836 | zlen = wnd_find(wnd, sbi->zone_max, lcn_s, 0, &lcn_s); |
82cae269 KK |
837 | wnd_zone_set(wnd, lcn_s, zlen); |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
842 | /* | |
e8b8e97f | 843 | * ntfs_update_mftmirr - Update $MFTMirr data. |
82cae269 | 844 | */ |
e66af07c | 845 | void ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait) |
82cae269 KK |
846 | { |
847 | int err; | |
848 | struct super_block *sb = sbi->sb; | |
321460ca | 849 | u32 blocksize; |
82cae269 KK |
850 | sector_t block1, block2; |
851 | u32 bytes; | |
852 | ||
321460ca | 853 | if (!sb) |
e66af07c | 854 | return; |
321460ca PS |
855 | |
856 | blocksize = sb->s_blocksize; | |
857 | ||
82cae269 | 858 | if (!(sbi->flags & NTFS_FLAGS_MFTMIRR)) |
e66af07c | 859 | return; |
82cae269 | 860 | |
82cae269 KK |
861 | bytes = sbi->mft.recs_mirr << sbi->record_bits; |
862 | block1 = sbi->mft.lbo >> sb->s_blocksize_bits; | |
863 | block2 = sbi->mft.lbo2 >> sb->s_blocksize_bits; | |
864 | ||
865 | for (; bytes >= blocksize; bytes -= blocksize) { | |
866 | struct buffer_head *bh1, *bh2; | |
867 | ||
868 | bh1 = sb_bread(sb, block1++); | |
e66af07c PS |
869 | if (!bh1) |
870 | return; | |
82cae269 KK |
871 | |
872 | bh2 = sb_getblk(sb, block2++); | |
873 | if (!bh2) { | |
874 | put_bh(bh1); | |
e66af07c | 875 | return; |
82cae269 KK |
876 | } |
877 | ||
878 | if (buffer_locked(bh2)) | |
879 | __wait_on_buffer(bh2); | |
880 | ||
881 | lock_buffer(bh2); | |
882 | memcpy(bh2->b_data, bh1->b_data, blocksize); | |
883 | set_buffer_uptodate(bh2); | |
884 | mark_buffer_dirty(bh2); | |
885 | unlock_buffer(bh2); | |
886 | ||
887 | put_bh(bh1); | |
888 | bh1 = NULL; | |
889 | ||
ba118928 | 890 | err = wait ? sync_dirty_buffer(bh2) : 0; |
82cae269 KK |
891 | |
892 | put_bh(bh2); | |
893 | if (err) | |
e66af07c | 894 | return; |
82cae269 KK |
895 | } |
896 | ||
897 | sbi->flags &= ~NTFS_FLAGS_MFTMIRR; | |
82cae269 | 898 | } |
82cae269 | 899 | |
c12df45e KK |
900 | /* |
901 | * ntfs_bad_inode | |
902 | * | |
903 | * Marks inode as bad and marks fs as 'dirty' | |
904 | */ | |
905 | void ntfs_bad_inode(struct inode *inode, const char *hint) | |
906 | { | |
907 | struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; | |
908 | ||
909 | ntfs_inode_err(inode, "%s", hint); | |
910 | make_bad_inode(inode); | |
911 | ntfs_set_state(sbi, NTFS_DIRTY_ERROR); | |
82cae269 KK |
912 | } |
913 | ||
914 | /* | |
915 | * ntfs_set_state | |
916 | * | |
e8b8e97f KA |
917 | * Mount: ntfs_set_state(NTFS_DIRTY_DIRTY) |
918 | * Umount: ntfs_set_state(NTFS_DIRTY_CLEAR) | |
919 | * NTFS error: ntfs_set_state(NTFS_DIRTY_ERROR) | |
82cae269 KK |
920 | */ |
921 | int ntfs_set_state(struct ntfs_sb_info *sbi, enum NTFS_DIRTY_FLAGS dirty) | |
922 | { | |
923 | int err; | |
924 | struct ATTRIB *attr; | |
925 | struct VOLUME_INFO *info; | |
926 | struct mft_inode *mi; | |
927 | struct ntfs_inode *ni; | |
928 | ||
929 | /* | |
e8b8e97f KA |
930 | * Do not change state if fs was real_dirty. |
931 | * Do not change state if fs already dirty(clear). | |
932 | * Do not change any thing if mounted read only. | |
82cae269 KK |
933 | */ |
934 | if (sbi->volume.real_dirty || sb_rdonly(sbi->sb)) | |
935 | return 0; | |
936 | ||
e8b8e97f | 937 | /* Check cached value. */ |
82cae269 KK |
938 | if ((dirty == NTFS_DIRTY_CLEAR ? 0 : VOLUME_FLAG_DIRTY) == |
939 | (sbi->volume.flags & VOLUME_FLAG_DIRTY)) | |
940 | return 0; | |
941 | ||
942 | ni = sbi->volume.ni; | |
943 | if (!ni) | |
944 | return -EINVAL; | |
945 | ||
946 | mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_DIRTY); | |
947 | ||
948 | attr = ni_find_attr(ni, NULL, NULL, ATTR_VOL_INFO, NULL, 0, NULL, &mi); | |
949 | if (!attr) { | |
950 | err = -EINVAL; | |
951 | goto out; | |
952 | } | |
953 | ||
954 | info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO); | |
955 | if (!info) { | |
956 | err = -EINVAL; | |
957 | goto out; | |
958 | } | |
959 | ||
960 | switch (dirty) { | |
961 | case NTFS_DIRTY_ERROR: | |
962 | ntfs_notice(sbi->sb, "Mark volume as dirty due to NTFS errors"); | |
963 | sbi->volume.real_dirty = true; | |
964 | fallthrough; | |
965 | case NTFS_DIRTY_DIRTY: | |
966 | info->flags |= VOLUME_FLAG_DIRTY; | |
967 | break; | |
968 | case NTFS_DIRTY_CLEAR: | |
969 | info->flags &= ~VOLUME_FLAG_DIRTY; | |
970 | break; | |
971 | } | |
e8b8e97f | 972 | /* Cache current volume flags. */ |
82cae269 KK |
973 | sbi->volume.flags = info->flags; |
974 | mi->dirty = true; | |
975 | err = 0; | |
976 | ||
977 | out: | |
978 | ni_unlock(ni); | |
979 | if (err) | |
980 | return err; | |
981 | ||
982 | mark_inode_dirty(&ni->vfs_inode); | |
e8b8e97f | 983 | /* verify(!ntfs_update_mftmirr()); */ |
82cae269 KK |
984 | |
985 | /* | |
d3624466 | 986 | * If we used wait=1, sync_inode_metadata waits for the io for the |
82cae269 KK |
987 | * inode to finish. It hangs when media is removed. |
988 | * So wait=0 is sent down to sync_inode_metadata | |
d3624466 | 989 | * and filemap_fdatawrite is used for the data blocks. |
82cae269 KK |
990 | */ |
991 | err = sync_inode_metadata(&ni->vfs_inode, 0); | |
992 | if (!err) | |
993 | err = filemap_fdatawrite(ni->vfs_inode.i_mapping); | |
994 | ||
995 | return err; | |
996 | } | |
997 | ||
998 | /* | |
e8b8e97f | 999 | * security_hash - Calculates a hash of security descriptor. |
82cae269 KK |
1000 | */ |
1001 | static inline __le32 security_hash(const void *sd, size_t bytes) | |
1002 | { | |
1003 | u32 hash = 0; | |
1004 | const __le32 *ptr = sd; | |
1005 | ||
1006 | bytes >>= 2; | |
1007 | while (bytes--) | |
1008 | hash = ((hash >> 0x1D) | (hash << 3)) + le32_to_cpu(*ptr++); | |
1009 | return cpu_to_le32(hash); | |
1010 | } | |
1011 | ||
1012 | int ntfs_sb_read(struct super_block *sb, u64 lbo, size_t bytes, void *buffer) | |
1013 | { | |
1014 | struct block_device *bdev = sb->s_bdev; | |
1015 | u32 blocksize = sb->s_blocksize; | |
1016 | u64 block = lbo >> sb->s_blocksize_bits; | |
1017 | u32 off = lbo & (blocksize - 1); | |
1018 | u32 op = blocksize - off; | |
1019 | ||
1020 | for (; bytes; block += 1, off = 0, op = blocksize) { | |
1021 | struct buffer_head *bh = __bread(bdev, block, blocksize); | |
1022 | ||
1023 | if (!bh) | |
1024 | return -EIO; | |
1025 | ||
1026 | if (op > bytes) | |
1027 | op = bytes; | |
1028 | ||
1029 | memcpy(buffer, bh->b_data + off, op); | |
1030 | ||
1031 | put_bh(bh); | |
1032 | ||
1033 | bytes -= op; | |
1034 | buffer = Add2Ptr(buffer, op); | |
1035 | } | |
1036 | ||
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | int ntfs_sb_write(struct super_block *sb, u64 lbo, size_t bytes, | |
1041 | const void *buf, int wait) | |
1042 | { | |
1043 | u32 blocksize = sb->s_blocksize; | |
1044 | struct block_device *bdev = sb->s_bdev; | |
1045 | sector_t block = lbo >> sb->s_blocksize_bits; | |
1046 | u32 off = lbo & (blocksize - 1); | |
1047 | u32 op = blocksize - off; | |
1048 | struct buffer_head *bh; | |
1049 | ||
1050 | if (!wait && (sb->s_flags & SB_SYNCHRONOUS)) | |
1051 | wait = 1; | |
1052 | ||
1053 | for (; bytes; block += 1, off = 0, op = blocksize) { | |
1054 | if (op > bytes) | |
1055 | op = bytes; | |
1056 | ||
1057 | if (op < blocksize) { | |
1058 | bh = __bread(bdev, block, blocksize); | |
1059 | if (!bh) { | |
1060 | ntfs_err(sb, "failed to read block %llx", | |
1061 | (u64)block); | |
1062 | return -EIO; | |
1063 | } | |
1064 | } else { | |
1065 | bh = __getblk(bdev, block, blocksize); | |
1066 | if (!bh) | |
1067 | return -ENOMEM; | |
1068 | } | |
1069 | ||
1070 | if (buffer_locked(bh)) | |
1071 | __wait_on_buffer(bh); | |
1072 | ||
1073 | lock_buffer(bh); | |
1074 | if (buf) { | |
1075 | memcpy(bh->b_data + off, buf, op); | |
1076 | buf = Add2Ptr(buf, op); | |
1077 | } else { | |
1078 | memset(bh->b_data + off, -1, op); | |
1079 | } | |
1080 | ||
1081 | set_buffer_uptodate(bh); | |
1082 | mark_buffer_dirty(bh); | |
1083 | unlock_buffer(bh); | |
1084 | ||
1085 | if (wait) { | |
1086 | int err = sync_dirty_buffer(bh); | |
1087 | ||
1088 | if (err) { | |
1089 | ntfs_err( | |
1090 | sb, | |
1091 | "failed to sync buffer at block %llx, error %d", | |
1092 | (u64)block, err); | |
1093 | put_bh(bh); | |
1094 | return err; | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | put_bh(bh); | |
1099 | ||
1100 | bytes -= op; | |
1101 | } | |
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | int ntfs_sb_write_run(struct ntfs_sb_info *sbi, const struct runs_tree *run, | |
63544672 | 1106 | u64 vbo, const void *buf, size_t bytes, int sync) |
82cae269 KK |
1107 | { |
1108 | struct super_block *sb = sbi->sb; | |
1109 | u8 cluster_bits = sbi->cluster_bits; | |
1110 | u32 off = vbo & sbi->cluster_mask; | |
1111 | CLST lcn, clen, vcn = vbo >> cluster_bits, vcn_next; | |
1112 | u64 lbo, len; | |
1113 | size_t idx; | |
1114 | ||
1115 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) | |
1116 | return -ENOENT; | |
1117 | ||
1118 | if (lcn == SPARSE_LCN) | |
1119 | return -EINVAL; | |
1120 | ||
1121 | lbo = ((u64)lcn << cluster_bits) + off; | |
1122 | len = ((u64)clen << cluster_bits) - off; | |
1123 | ||
1124 | for (;;) { | |
6e3331ee | 1125 | u32 op = min_t(u64, len, bytes); |
63544672 | 1126 | int err = ntfs_sb_write(sb, lbo, op, buf, sync); |
82cae269 KK |
1127 | |
1128 | if (err) | |
1129 | return err; | |
1130 | ||
1131 | bytes -= op; | |
1132 | if (!bytes) | |
1133 | break; | |
1134 | ||
1135 | vcn_next = vcn + clen; | |
1136 | if (!run_get_entry(run, ++idx, &vcn, &lcn, &clen) || | |
1137 | vcn != vcn_next) | |
1138 | return -ENOENT; | |
1139 | ||
1140 | if (lcn == SPARSE_LCN) | |
1141 | return -EINVAL; | |
1142 | ||
1143 | if (buf) | |
1144 | buf = Add2Ptr(buf, op); | |
1145 | ||
1146 | lbo = ((u64)lcn << cluster_bits); | |
1147 | len = ((u64)clen << cluster_bits); | |
1148 | } | |
1149 | ||
1150 | return 0; | |
1151 | } | |
1152 | ||
1153 | struct buffer_head *ntfs_bread_run(struct ntfs_sb_info *sbi, | |
1154 | const struct runs_tree *run, u64 vbo) | |
1155 | { | |
1156 | struct super_block *sb = sbi->sb; | |
1157 | u8 cluster_bits = sbi->cluster_bits; | |
1158 | CLST lcn; | |
1159 | u64 lbo; | |
1160 | ||
1161 | if (!run_lookup_entry(run, vbo >> cluster_bits, &lcn, NULL, NULL)) | |
1162 | return ERR_PTR(-ENOENT); | |
1163 | ||
1164 | lbo = ((u64)lcn << cluster_bits) + (vbo & sbi->cluster_mask); | |
1165 | ||
1166 | return ntfs_bread(sb, lbo >> sb->s_blocksize_bits); | |
1167 | } | |
1168 | ||
1169 | int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run, | |
1170 | u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb) | |
1171 | { | |
1172 | int err; | |
1173 | struct super_block *sb = sbi->sb; | |
1174 | u32 blocksize = sb->s_blocksize; | |
1175 | u8 cluster_bits = sbi->cluster_bits; | |
1176 | u32 off = vbo & sbi->cluster_mask; | |
1177 | u32 nbh = 0; | |
1178 | CLST vcn_next, vcn = vbo >> cluster_bits; | |
1179 | CLST lcn, clen; | |
1180 | u64 lbo, len; | |
1181 | size_t idx; | |
1182 | struct buffer_head *bh; | |
1183 | ||
1184 | if (!run) { | |
e8b8e97f | 1185 | /* First reading of $Volume + $MFTMirr + $LogFile goes here. */ |
82cae269 KK |
1186 | if (vbo > MFT_REC_VOL * sbi->record_size) { |
1187 | err = -ENOENT; | |
1188 | goto out; | |
1189 | } | |
1190 | ||
e8b8e97f | 1191 | /* Use absolute boot's 'MFTCluster' to read record. */ |
82cae269 KK |
1192 | lbo = vbo + sbi->mft.lbo; |
1193 | len = sbi->record_size; | |
1194 | } else if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) { | |
1195 | err = -ENOENT; | |
1196 | goto out; | |
1197 | } else { | |
1198 | if (lcn == SPARSE_LCN) { | |
1199 | err = -EINVAL; | |
1200 | goto out; | |
1201 | } | |
1202 | ||
1203 | lbo = ((u64)lcn << cluster_bits) + off; | |
1204 | len = ((u64)clen << cluster_bits) - off; | |
1205 | } | |
1206 | ||
1207 | off = lbo & (blocksize - 1); | |
1208 | if (nb) { | |
1209 | nb->off = off; | |
1210 | nb->bytes = bytes; | |
1211 | } | |
1212 | ||
1213 | for (;;) { | |
1214 | u32 len32 = len >= bytes ? bytes : len; | |
1215 | sector_t block = lbo >> sb->s_blocksize_bits; | |
1216 | ||
1217 | do { | |
1218 | u32 op = blocksize - off; | |
1219 | ||
1220 | if (op > len32) | |
1221 | op = len32; | |
1222 | ||
1223 | bh = ntfs_bread(sb, block); | |
1224 | if (!bh) { | |
1225 | err = -EIO; | |
1226 | goto out; | |
1227 | } | |
1228 | ||
1229 | if (buf) { | |
1230 | memcpy(buf, bh->b_data + off, op); | |
1231 | buf = Add2Ptr(buf, op); | |
1232 | } | |
1233 | ||
1234 | if (!nb) { | |
1235 | put_bh(bh); | |
1236 | } else if (nbh >= ARRAY_SIZE(nb->bh)) { | |
1237 | err = -EINVAL; | |
1238 | goto out; | |
1239 | } else { | |
1240 | nb->bh[nbh++] = bh; | |
1241 | nb->nbufs = nbh; | |
1242 | } | |
1243 | ||
1244 | bytes -= op; | |
1245 | if (!bytes) | |
1246 | return 0; | |
1247 | len32 -= op; | |
1248 | block += 1; | |
1249 | off = 0; | |
1250 | ||
1251 | } while (len32); | |
1252 | ||
1253 | vcn_next = vcn + clen; | |
1254 | if (!run_get_entry(run, ++idx, &vcn, &lcn, &clen) || | |
1255 | vcn != vcn_next) { | |
1256 | err = -ENOENT; | |
1257 | goto out; | |
1258 | } | |
1259 | ||
1260 | if (lcn == SPARSE_LCN) { | |
1261 | err = -EINVAL; | |
1262 | goto out; | |
1263 | } | |
1264 | ||
1265 | lbo = ((u64)lcn << cluster_bits); | |
1266 | len = ((u64)clen << cluster_bits); | |
1267 | } | |
1268 | ||
1269 | out: | |
1270 | if (!nbh) | |
1271 | return err; | |
1272 | ||
1273 | while (nbh) { | |
1274 | put_bh(nb->bh[--nbh]); | |
1275 | nb->bh[nbh] = NULL; | |
1276 | } | |
1277 | ||
1278 | nb->nbufs = 0; | |
1279 | return err; | |
1280 | } | |
1281 | ||
e8b8e97f KA |
1282 | /* |
1283 | * ntfs_read_bh | |
1284 | * | |
1285 | * Return: < 0 if error, 0 if ok, -E_NTFS_FIXUP if need to update fixups. | |
1286 | */ | |
82cae269 KK |
1287 | int ntfs_read_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo, |
1288 | struct NTFS_RECORD_HEADER *rhdr, u32 bytes, | |
1289 | struct ntfs_buffers *nb) | |
1290 | { | |
1291 | int err = ntfs_read_run_nb(sbi, run, vbo, rhdr, bytes, nb); | |
1292 | ||
1293 | if (err) | |
1294 | return err; | |
1295 | return ntfs_fix_post_read(rhdr, nb->bytes, true); | |
1296 | } | |
1297 | ||
1298 | int ntfs_get_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo, | |
1299 | u32 bytes, struct ntfs_buffers *nb) | |
1300 | { | |
1301 | int err = 0; | |
1302 | struct super_block *sb = sbi->sb; | |
1303 | u32 blocksize = sb->s_blocksize; | |
1304 | u8 cluster_bits = sbi->cluster_bits; | |
1305 | CLST vcn_next, vcn = vbo >> cluster_bits; | |
1306 | u32 off; | |
1307 | u32 nbh = 0; | |
1308 | CLST lcn, clen; | |
1309 | u64 lbo, len; | |
1310 | size_t idx; | |
1311 | ||
1312 | nb->bytes = bytes; | |
1313 | ||
1314 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) { | |
1315 | err = -ENOENT; | |
1316 | goto out; | |
1317 | } | |
1318 | ||
1319 | off = vbo & sbi->cluster_mask; | |
1320 | lbo = ((u64)lcn << cluster_bits) + off; | |
1321 | len = ((u64)clen << cluster_bits) - off; | |
1322 | ||
1323 | nb->off = off = lbo & (blocksize - 1); | |
1324 | ||
1325 | for (;;) { | |
6e3331ee | 1326 | u32 len32 = min_t(u64, len, bytes); |
82cae269 KK |
1327 | sector_t block = lbo >> sb->s_blocksize_bits; |
1328 | ||
1329 | do { | |
1330 | u32 op; | |
1331 | struct buffer_head *bh; | |
1332 | ||
1333 | if (nbh >= ARRAY_SIZE(nb->bh)) { | |
1334 | err = -EINVAL; | |
1335 | goto out; | |
1336 | } | |
1337 | ||
1338 | op = blocksize - off; | |
1339 | if (op > len32) | |
1340 | op = len32; | |
1341 | ||
1342 | if (op == blocksize) { | |
1343 | bh = sb_getblk(sb, block); | |
1344 | if (!bh) { | |
1345 | err = -ENOMEM; | |
1346 | goto out; | |
1347 | } | |
1348 | if (buffer_locked(bh)) | |
1349 | __wait_on_buffer(bh); | |
1350 | set_buffer_uptodate(bh); | |
1351 | } else { | |
1352 | bh = ntfs_bread(sb, block); | |
1353 | if (!bh) { | |
1354 | err = -EIO; | |
1355 | goto out; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | nb->bh[nbh++] = bh; | |
1360 | bytes -= op; | |
1361 | if (!bytes) { | |
1362 | nb->nbufs = nbh; | |
1363 | return 0; | |
1364 | } | |
1365 | ||
1366 | block += 1; | |
1367 | len32 -= op; | |
1368 | off = 0; | |
1369 | } while (len32); | |
1370 | ||
1371 | vcn_next = vcn + clen; | |
1372 | if (!run_get_entry(run, ++idx, &vcn, &lcn, &clen) || | |
1373 | vcn != vcn_next) { | |
1374 | err = -ENOENT; | |
1375 | goto out; | |
1376 | } | |
1377 | ||
1378 | lbo = ((u64)lcn << cluster_bits); | |
1379 | len = ((u64)clen << cluster_bits); | |
1380 | } | |
1381 | ||
1382 | out: | |
1383 | while (nbh) { | |
1384 | put_bh(nb->bh[--nbh]); | |
1385 | nb->bh[nbh] = NULL; | |
1386 | } | |
1387 | ||
1388 | nb->nbufs = 0; | |
1389 | ||
1390 | return err; | |
1391 | } | |
1392 | ||
1393 | int ntfs_write_bh(struct ntfs_sb_info *sbi, struct NTFS_RECORD_HEADER *rhdr, | |
1394 | struct ntfs_buffers *nb, int sync) | |
1395 | { | |
1396 | int err = 0; | |
1397 | struct super_block *sb = sbi->sb; | |
1398 | u32 block_size = sb->s_blocksize; | |
1399 | u32 bytes = nb->bytes; | |
1400 | u32 off = nb->off; | |
1401 | u16 fo = le16_to_cpu(rhdr->fix_off); | |
1402 | u16 fn = le16_to_cpu(rhdr->fix_num); | |
1403 | u32 idx; | |
1404 | __le16 *fixup; | |
1405 | __le16 sample; | |
1406 | ||
1407 | if ((fo & 1) || fo + fn * sizeof(short) > SECTOR_SIZE || !fn-- || | |
1408 | fn * SECTOR_SIZE > bytes) { | |
1409 | return -EINVAL; | |
1410 | } | |
1411 | ||
1412 | for (idx = 0; bytes && idx < nb->nbufs; idx += 1, off = 0) { | |
1413 | u32 op = block_size - off; | |
1414 | char *bh_data; | |
1415 | struct buffer_head *bh = nb->bh[idx]; | |
1416 | __le16 *ptr, *end_data; | |
1417 | ||
1418 | if (op > bytes) | |
1419 | op = bytes; | |
1420 | ||
1421 | if (buffer_locked(bh)) | |
1422 | __wait_on_buffer(bh); | |
1423 | ||
8335ebe1 | 1424 | lock_buffer(bh); |
82cae269 KK |
1425 | |
1426 | bh_data = bh->b_data + off; | |
1427 | end_data = Add2Ptr(bh_data, op); | |
1428 | memcpy(bh_data, rhdr, op); | |
1429 | ||
1430 | if (!idx) { | |
1431 | u16 t16; | |
1432 | ||
1433 | fixup = Add2Ptr(bh_data, fo); | |
1434 | sample = *fixup; | |
1435 | t16 = le16_to_cpu(sample); | |
1436 | if (t16 >= 0x7FFF) { | |
1437 | sample = *fixup = cpu_to_le16(1); | |
1438 | } else { | |
1439 | sample = cpu_to_le16(t16 + 1); | |
1440 | *fixup = sample; | |
1441 | } | |
1442 | ||
1443 | *(__le16 *)Add2Ptr(rhdr, fo) = sample; | |
1444 | } | |
1445 | ||
1446 | ptr = Add2Ptr(bh_data, SECTOR_SIZE - sizeof(short)); | |
1447 | ||
1448 | do { | |
1449 | *++fixup = *ptr; | |
1450 | *ptr = sample; | |
1451 | ptr += SECTOR_SIZE / sizeof(short); | |
1452 | } while (ptr < end_data); | |
1453 | ||
1454 | set_buffer_uptodate(bh); | |
1455 | mark_buffer_dirty(bh); | |
1456 | unlock_buffer(bh); | |
1457 | ||
1458 | if (sync) { | |
1459 | int err2 = sync_dirty_buffer(bh); | |
1460 | ||
1461 | if (!err && err2) | |
1462 | err = err2; | |
1463 | } | |
1464 | ||
1465 | bytes -= op; | |
1466 | rhdr = Add2Ptr(rhdr, op); | |
1467 | } | |
1468 | ||
1469 | return err; | |
1470 | } | |
1471 | ||
e8b8e97f KA |
1472 | /* |
1473 | * ntfs_bio_pages - Read/write pages from/to disk. | |
1474 | */ | |
82cae269 KK |
1475 | int ntfs_bio_pages(struct ntfs_sb_info *sbi, const struct runs_tree *run, |
1476 | struct page **pages, u32 nr_pages, u64 vbo, u32 bytes, | |
ce6b5315 | 1477 | enum req_op op) |
82cae269 KK |
1478 | { |
1479 | int err = 0; | |
1480 | struct bio *new, *bio = NULL; | |
1481 | struct super_block *sb = sbi->sb; | |
1482 | struct block_device *bdev = sb->s_bdev; | |
1483 | struct page *page; | |
1484 | u8 cluster_bits = sbi->cluster_bits; | |
1485 | CLST lcn, clen, vcn, vcn_next; | |
1486 | u32 add, off, page_idx; | |
1487 | u64 lbo, len; | |
1488 | size_t run_idx; | |
1489 | struct blk_plug plug; | |
1490 | ||
1491 | if (!bytes) | |
1492 | return 0; | |
1493 | ||
1494 | blk_start_plug(&plug); | |
1495 | ||
e8b8e97f | 1496 | /* Align vbo and bytes to be 512 bytes aligned. */ |
82cae269 KK |
1497 | lbo = (vbo + bytes + 511) & ~511ull; |
1498 | vbo = vbo & ~511ull; | |
1499 | bytes = lbo - vbo; | |
1500 | ||
1501 | vcn = vbo >> cluster_bits; | |
1502 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &run_idx)) { | |
1503 | err = -ENOENT; | |
1504 | goto out; | |
1505 | } | |
1506 | off = vbo & sbi->cluster_mask; | |
1507 | page_idx = 0; | |
1508 | page = pages[0]; | |
1509 | ||
1510 | for (;;) { | |
1511 | lbo = ((u64)lcn << cluster_bits) + off; | |
1512 | len = ((u64)clen << cluster_bits) - off; | |
1513 | new_bio: | |
07888c66 | 1514 | new = bio_alloc(bdev, nr_pages - page_idx, op, GFP_NOFS); |
82cae269 KK |
1515 | if (bio) { |
1516 | bio_chain(bio, new); | |
1517 | submit_bio(bio); | |
1518 | } | |
1519 | bio = new; | |
82cae269 | 1520 | bio->bi_iter.bi_sector = lbo >> 9; |
82cae269 KK |
1521 | |
1522 | while (len) { | |
1523 | off = vbo & (PAGE_SIZE - 1); | |
1524 | add = off + len > PAGE_SIZE ? (PAGE_SIZE - off) : len; | |
1525 | ||
1526 | if (bio_add_page(bio, page, add, off) < add) | |
1527 | goto new_bio; | |
1528 | ||
1529 | if (bytes <= add) | |
1530 | goto out; | |
1531 | bytes -= add; | |
1532 | vbo += add; | |
1533 | ||
1534 | if (add + off == PAGE_SIZE) { | |
1535 | page_idx += 1; | |
1536 | if (WARN_ON(page_idx >= nr_pages)) { | |
1537 | err = -EINVAL; | |
1538 | goto out; | |
1539 | } | |
1540 | page = pages[page_idx]; | |
1541 | } | |
1542 | ||
1543 | if (len <= add) | |
1544 | break; | |
1545 | len -= add; | |
1546 | lbo += add; | |
1547 | } | |
1548 | ||
1549 | vcn_next = vcn + clen; | |
1550 | if (!run_get_entry(run, ++run_idx, &vcn, &lcn, &clen) || | |
1551 | vcn != vcn_next) { | |
1552 | err = -ENOENT; | |
1553 | goto out; | |
1554 | } | |
1555 | off = 0; | |
1556 | } | |
1557 | out: | |
1558 | if (bio) { | |
1559 | if (!err) | |
1560 | err = submit_bio_wait(bio); | |
1561 | bio_put(bio); | |
1562 | } | |
1563 | blk_finish_plug(&plug); | |
1564 | ||
1565 | return err; | |
1566 | } | |
1567 | ||
1568 | /* | |
e8b8e97f KA |
1569 | * ntfs_bio_fill_1 - Helper for ntfs_loadlog_and_replay(). |
1570 | * | |
1571 | * Fill on-disk logfile range by (-1) | |
1572 | * this means empty logfile. | |
82cae269 KK |
1573 | */ |
1574 | int ntfs_bio_fill_1(struct ntfs_sb_info *sbi, const struct runs_tree *run) | |
1575 | { | |
1576 | int err = 0; | |
1577 | struct super_block *sb = sbi->sb; | |
1578 | struct block_device *bdev = sb->s_bdev; | |
1579 | u8 cluster_bits = sbi->cluster_bits; | |
1580 | struct bio *new, *bio = NULL; | |
1581 | CLST lcn, clen; | |
1582 | u64 lbo, len; | |
1583 | size_t run_idx; | |
1584 | struct page *fill; | |
1585 | void *kaddr; | |
1586 | struct blk_plug plug; | |
1587 | ||
1588 | fill = alloc_page(GFP_KERNEL); | |
1589 | if (!fill) | |
1590 | return -ENOMEM; | |
1591 | ||
1592 | kaddr = kmap_atomic(fill); | |
1593 | memset(kaddr, -1, PAGE_SIZE); | |
1594 | kunmap_atomic(kaddr); | |
1595 | flush_dcache_page(fill); | |
1596 | lock_page(fill); | |
1597 | ||
1598 | if (!run_lookup_entry(run, 0, &lcn, &clen, &run_idx)) { | |
1599 | err = -ENOENT; | |
1600 | goto out; | |
1601 | } | |
1602 | ||
1603 | /* | |
e8b8e97f | 1604 | * TODO: Try blkdev_issue_write_same. |
82cae269 KK |
1605 | */ |
1606 | blk_start_plug(&plug); | |
1607 | do { | |
1608 | lbo = (u64)lcn << cluster_bits; | |
1609 | len = (u64)clen << cluster_bits; | |
1610 | new_bio: | |
07888c66 | 1611 | new = bio_alloc(bdev, BIO_MAX_VECS, REQ_OP_WRITE, GFP_NOFS); |
82cae269 KK |
1612 | if (bio) { |
1613 | bio_chain(bio, new); | |
1614 | submit_bio(bio); | |
1615 | } | |
1616 | bio = new; | |
82cae269 KK |
1617 | bio->bi_iter.bi_sector = lbo >> 9; |
1618 | ||
1619 | for (;;) { | |
1620 | u32 add = len > PAGE_SIZE ? PAGE_SIZE : len; | |
1621 | ||
1622 | if (bio_add_page(bio, fill, add, 0) < add) | |
1623 | goto new_bio; | |
1624 | ||
1625 | lbo += add; | |
1626 | if (len <= add) | |
1627 | break; | |
1628 | len -= add; | |
1629 | } | |
1630 | } while (run_get_entry(run, ++run_idx, NULL, &lcn, &clen)); | |
1631 | ||
365ab499 DC |
1632 | if (!err) |
1633 | err = submit_bio_wait(bio); | |
1634 | bio_put(bio); | |
1635 | ||
82cae269 KK |
1636 | blk_finish_plug(&plug); |
1637 | out: | |
1638 | unlock_page(fill); | |
1639 | put_page(fill); | |
1640 | ||
1641 | return err; | |
1642 | } | |
1643 | ||
1644 | int ntfs_vbo_to_lbo(struct ntfs_sb_info *sbi, const struct runs_tree *run, | |
1645 | u64 vbo, u64 *lbo, u64 *bytes) | |
1646 | { | |
1647 | u32 off; | |
1648 | CLST lcn, len; | |
1649 | u8 cluster_bits = sbi->cluster_bits; | |
1650 | ||
1651 | if (!run_lookup_entry(run, vbo >> cluster_bits, &lcn, &len, NULL)) | |
1652 | return -ENOENT; | |
1653 | ||
1654 | off = vbo & sbi->cluster_mask; | |
1655 | *lbo = lcn == SPARSE_LCN ? -1 : (((u64)lcn << cluster_bits) + off); | |
1656 | *bytes = ((u64)len << cluster_bits) - off; | |
1657 | ||
1658 | return 0; | |
1659 | } | |
1660 | ||
1661 | struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST rno, bool dir) | |
1662 | { | |
1663 | int err = 0; | |
1664 | struct super_block *sb = sbi->sb; | |
1665 | struct inode *inode = new_inode(sb); | |
1666 | struct ntfs_inode *ni; | |
1667 | ||
1668 | if (!inode) | |
1669 | return ERR_PTR(-ENOMEM); | |
1670 | ||
1671 | ni = ntfs_i(inode); | |
1672 | ||
1673 | err = mi_format_new(&ni->mi, sbi, rno, dir ? RECORD_FLAG_DIR : 0, | |
1674 | false); | |
1675 | if (err) | |
1676 | goto out; | |
1677 | ||
1678 | inode->i_ino = rno; | |
1679 | if (insert_inode_locked(inode) < 0) { | |
1680 | err = -EIO; | |
1681 | goto out; | |
1682 | } | |
1683 | ||
1684 | out: | |
1685 | if (err) { | |
1686 | iput(inode); | |
1687 | ni = ERR_PTR(err); | |
1688 | } | |
1689 | return ni; | |
1690 | } | |
1691 | ||
1692 | /* | |
1693 | * O:BAG:BAD:(A;OICI;FA;;;WD) | |
e8b8e97f KA |
1694 | * Owner S-1-5-32-544 (Administrators) |
1695 | * Group S-1-5-32-544 (Administrators) | |
82cae269 KK |
1696 | * ACE: allow S-1-1-0 (Everyone) with FILE_ALL_ACCESS |
1697 | */ | |
1698 | const u8 s_default_security[] __aligned(8) = { | |
1699 | 0x01, 0x00, 0x04, 0x80, 0x30, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, | |
1700 | 0x00, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x02, 0x00, 0x1C, 0x00, | |
1701 | 0x01, 0x00, 0x00, 0x00, 0x00, 0x03, 0x14, 0x00, 0xFF, 0x01, 0x1F, 0x00, | |
1702 | 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, | |
1703 | 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x20, 0x00, 0x00, 0x00, | |
1704 | 0x20, 0x02, 0x00, 0x00, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, | |
1705 | 0x20, 0x00, 0x00, 0x00, 0x20, 0x02, 0x00, 0x00, | |
1706 | }; | |
1707 | ||
1708 | static_assert(sizeof(s_default_security) == 0x50); | |
1709 | ||
1710 | static inline u32 sid_length(const struct SID *sid) | |
1711 | { | |
1712 | return struct_size(sid, SubAuthority, sid->SubAuthorityCount); | |
1713 | } | |
1714 | ||
1715 | /* | |
e8b8e97f KA |
1716 | * is_acl_valid |
1717 | * | |
1718 | * Thanks Mark Harmstone for idea. | |
82cae269 KK |
1719 | */ |
1720 | static bool is_acl_valid(const struct ACL *acl, u32 len) | |
1721 | { | |
1722 | const struct ACE_HEADER *ace; | |
1723 | u32 i; | |
1724 | u16 ace_count, ace_size; | |
1725 | ||
1726 | if (acl->AclRevision != ACL_REVISION && | |
1727 | acl->AclRevision != ACL_REVISION_DS) { | |
1728 | /* | |
1729 | * This value should be ACL_REVISION, unless the ACL contains an | |
1730 | * object-specific ACE, in which case this value must be ACL_REVISION_DS. | |
1731 | * All ACEs in an ACL must be at the same revision level. | |
1732 | */ | |
1733 | return false; | |
1734 | } | |
1735 | ||
1736 | if (acl->Sbz1) | |
1737 | return false; | |
1738 | ||
1739 | if (le16_to_cpu(acl->AclSize) > len) | |
1740 | return false; | |
1741 | ||
1742 | if (acl->Sbz2) | |
1743 | return false; | |
1744 | ||
1745 | len -= sizeof(struct ACL); | |
1746 | ace = (struct ACE_HEADER *)&acl[1]; | |
1747 | ace_count = le16_to_cpu(acl->AceCount); | |
1748 | ||
1749 | for (i = 0; i < ace_count; i++) { | |
1750 | if (len < sizeof(struct ACE_HEADER)) | |
1751 | return false; | |
1752 | ||
1753 | ace_size = le16_to_cpu(ace->AceSize); | |
1754 | if (len < ace_size) | |
1755 | return false; | |
1756 | ||
1757 | len -= ace_size; | |
1758 | ace = Add2Ptr(ace, ace_size); | |
1759 | } | |
1760 | ||
1761 | return true; | |
1762 | } | |
1763 | ||
1764 | bool is_sd_valid(const struct SECURITY_DESCRIPTOR_RELATIVE *sd, u32 len) | |
1765 | { | |
1766 | u32 sd_owner, sd_group, sd_sacl, sd_dacl; | |
1767 | ||
1768 | if (len < sizeof(struct SECURITY_DESCRIPTOR_RELATIVE)) | |
1769 | return false; | |
1770 | ||
1771 | if (sd->Revision != 1) | |
1772 | return false; | |
1773 | ||
1774 | if (sd->Sbz1) | |
1775 | return false; | |
1776 | ||
1777 | if (!(sd->Control & SE_SELF_RELATIVE)) | |
1778 | return false; | |
1779 | ||
1780 | sd_owner = le32_to_cpu(sd->Owner); | |
1781 | if (sd_owner) { | |
1782 | const struct SID *owner = Add2Ptr(sd, sd_owner); | |
1783 | ||
1784 | if (sd_owner + offsetof(struct SID, SubAuthority) > len) | |
1785 | return false; | |
1786 | ||
1787 | if (owner->Revision != 1) | |
1788 | return false; | |
1789 | ||
1790 | if (sd_owner + sid_length(owner) > len) | |
1791 | return false; | |
1792 | } | |
1793 | ||
1794 | sd_group = le32_to_cpu(sd->Group); | |
1795 | if (sd_group) { | |
1796 | const struct SID *group = Add2Ptr(sd, sd_group); | |
1797 | ||
1798 | if (sd_group + offsetof(struct SID, SubAuthority) > len) | |
1799 | return false; | |
1800 | ||
1801 | if (group->Revision != 1) | |
1802 | return false; | |
1803 | ||
1804 | if (sd_group + sid_length(group) > len) | |
1805 | return false; | |
1806 | } | |
1807 | ||
1808 | sd_sacl = le32_to_cpu(sd->Sacl); | |
1809 | if (sd_sacl) { | |
1810 | const struct ACL *sacl = Add2Ptr(sd, sd_sacl); | |
1811 | ||
1812 | if (sd_sacl + sizeof(struct ACL) > len) | |
1813 | return false; | |
1814 | ||
1815 | if (!is_acl_valid(sacl, len - sd_sacl)) | |
1816 | return false; | |
1817 | } | |
1818 | ||
1819 | sd_dacl = le32_to_cpu(sd->Dacl); | |
1820 | if (sd_dacl) { | |
1821 | const struct ACL *dacl = Add2Ptr(sd, sd_dacl); | |
1822 | ||
1823 | if (sd_dacl + sizeof(struct ACL) > len) | |
1824 | return false; | |
1825 | ||
1826 | if (!is_acl_valid(dacl, len - sd_dacl)) | |
1827 | return false; | |
1828 | } | |
1829 | ||
1830 | return true; | |
1831 | } | |
1832 | ||
1833 | /* | |
e8b8e97f | 1834 | * ntfs_security_init - Load and parse $Secure. |
82cae269 KK |
1835 | */ |
1836 | int ntfs_security_init(struct ntfs_sb_info *sbi) | |
1837 | { | |
1838 | int err; | |
1839 | struct super_block *sb = sbi->sb; | |
1840 | struct inode *inode; | |
1841 | struct ntfs_inode *ni; | |
1842 | struct MFT_REF ref; | |
1843 | struct ATTRIB *attr; | |
1844 | struct ATTR_LIST_ENTRY *le; | |
1845 | u64 sds_size; | |
8c01308b | 1846 | size_t off; |
82cae269 KK |
1847 | struct NTFS_DE *ne; |
1848 | struct NTFS_DE_SII *sii_e; | |
1849 | struct ntfs_fnd *fnd_sii = NULL; | |
1850 | const struct INDEX_ROOT *root_sii; | |
1851 | const struct INDEX_ROOT *root_sdh; | |
1852 | struct ntfs_index *indx_sdh = &sbi->security.index_sdh; | |
1853 | struct ntfs_index *indx_sii = &sbi->security.index_sii; | |
1854 | ||
1855 | ref.low = cpu_to_le32(MFT_REC_SECURE); | |
1856 | ref.high = 0; | |
1857 | ref.seq = cpu_to_le16(MFT_REC_SECURE); | |
1858 | ||
1859 | inode = ntfs_iget5(sb, &ref, &NAME_SECURE); | |
1860 | if (IS_ERR(inode)) { | |
1861 | err = PTR_ERR(inode); | |
1862 | ntfs_err(sb, "Failed to load $Secure."); | |
1863 | inode = NULL; | |
1864 | goto out; | |
1865 | } | |
1866 | ||
1867 | ni = ntfs_i(inode); | |
1868 | ||
1869 | le = NULL; | |
1870 | ||
1871 | attr = ni_find_attr(ni, NULL, &le, ATTR_ROOT, SDH_NAME, | |
1872 | ARRAY_SIZE(SDH_NAME), NULL, NULL); | |
1873 | if (!attr) { | |
1874 | err = -EINVAL; | |
1875 | goto out; | |
1876 | } | |
1877 | ||
bfcdbae0 | 1878 | root_sdh = resident_data_ex(attr, sizeof(struct INDEX_ROOT)); |
82cae269 | 1879 | if (root_sdh->type != ATTR_ZERO || |
bfcdbae0 EL |
1880 | root_sdh->rule != NTFS_COLLATION_TYPE_SECURITY_HASH || |
1881 | offsetof(struct INDEX_ROOT, ihdr) + root_sdh->ihdr.used > attr->res.data_size) { | |
82cae269 KK |
1882 | err = -EINVAL; |
1883 | goto out; | |
1884 | } | |
1885 | ||
1886 | err = indx_init(indx_sdh, sbi, attr, INDEX_MUTEX_SDH); | |
1887 | if (err) | |
1888 | goto out; | |
1889 | ||
1890 | attr = ni_find_attr(ni, attr, &le, ATTR_ROOT, SII_NAME, | |
1891 | ARRAY_SIZE(SII_NAME), NULL, NULL); | |
1892 | if (!attr) { | |
1893 | err = -EINVAL; | |
1894 | goto out; | |
1895 | } | |
1896 | ||
bfcdbae0 | 1897 | root_sii = resident_data_ex(attr, sizeof(struct INDEX_ROOT)); |
82cae269 | 1898 | if (root_sii->type != ATTR_ZERO || |
bfcdbae0 EL |
1899 | root_sii->rule != NTFS_COLLATION_TYPE_UINT || |
1900 | offsetof(struct INDEX_ROOT, ihdr) + root_sii->ihdr.used > attr->res.data_size) { | |
82cae269 KK |
1901 | err = -EINVAL; |
1902 | goto out; | |
1903 | } | |
1904 | ||
1905 | err = indx_init(indx_sii, sbi, attr, INDEX_MUTEX_SII); | |
1906 | if (err) | |
1907 | goto out; | |
1908 | ||
1909 | fnd_sii = fnd_get(); | |
1910 | if (!fnd_sii) { | |
1911 | err = -ENOMEM; | |
1912 | goto out; | |
1913 | } | |
1914 | ||
1915 | sds_size = inode->i_size; | |
1916 | ||
e8b8e97f | 1917 | /* Find the last valid Id. */ |
82cae269 | 1918 | sbi->security.next_id = SECURITY_ID_FIRST; |
e8b8e97f | 1919 | /* Always write new security at the end of bucket. */ |
82cae269 | 1920 | sbi->security.next_off = |
d3624466 | 1921 | ALIGN(sds_size - SecurityDescriptorsBlockSize, 16); |
82cae269 | 1922 | |
82cae269 KK |
1923 | off = 0; |
1924 | ne = NULL; | |
1925 | ||
1926 | for (;;) { | |
1927 | u32 next_id; | |
1928 | ||
1929 | err = indx_find_raw(indx_sii, ni, root_sii, &ne, &off, fnd_sii); | |
1930 | if (err || !ne) | |
1931 | break; | |
1932 | ||
1933 | sii_e = (struct NTFS_DE_SII *)ne; | |
1934 | if (le16_to_cpu(ne->view.data_size) < SIZEOF_SECURITY_HDR) | |
1935 | continue; | |
1936 | ||
1937 | next_id = le32_to_cpu(sii_e->sec_id) + 1; | |
1938 | if (next_id >= sbi->security.next_id) | |
1939 | sbi->security.next_id = next_id; | |
82cae269 KK |
1940 | } |
1941 | ||
1942 | sbi->security.ni = ni; | |
1943 | inode = NULL; | |
1944 | out: | |
1945 | iput(inode); | |
1946 | fnd_put(fnd_sii); | |
1947 | ||
1948 | return err; | |
1949 | } | |
1950 | ||
1951 | /* | |
e8b8e97f | 1952 | * ntfs_get_security_by_id - Read security descriptor by id. |
82cae269 KK |
1953 | */ |
1954 | int ntfs_get_security_by_id(struct ntfs_sb_info *sbi, __le32 security_id, | |
1955 | struct SECURITY_DESCRIPTOR_RELATIVE **sd, | |
1956 | size_t *size) | |
1957 | { | |
1958 | int err; | |
1959 | int diff; | |
1960 | struct ntfs_inode *ni = sbi->security.ni; | |
1961 | struct ntfs_index *indx = &sbi->security.index_sii; | |
1962 | void *p = NULL; | |
1963 | struct NTFS_DE_SII *sii_e; | |
1964 | struct ntfs_fnd *fnd_sii; | |
1965 | struct SECURITY_HDR d_security; | |
1966 | const struct INDEX_ROOT *root_sii; | |
1967 | u32 t32; | |
1968 | ||
1969 | *sd = NULL; | |
1970 | ||
1971 | mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_SECURITY); | |
1972 | ||
1973 | fnd_sii = fnd_get(); | |
1974 | if (!fnd_sii) { | |
1975 | err = -ENOMEM; | |
1976 | goto out; | |
1977 | } | |
1978 | ||
1979 | root_sii = indx_get_root(indx, ni, NULL, NULL); | |
1980 | if (!root_sii) { | |
1981 | err = -EINVAL; | |
1982 | goto out; | |
1983 | } | |
1984 | ||
e8b8e97f | 1985 | /* Try to find this SECURITY descriptor in SII indexes. */ |
82cae269 KK |
1986 | err = indx_find(indx, ni, root_sii, &security_id, sizeof(security_id), |
1987 | NULL, &diff, (struct NTFS_DE **)&sii_e, fnd_sii); | |
1988 | if (err) | |
1989 | goto out; | |
1990 | ||
1991 | if (diff) | |
1992 | goto out; | |
1993 | ||
1994 | t32 = le32_to_cpu(sii_e->sec_hdr.size); | |
1995 | if (t32 < SIZEOF_SECURITY_HDR) { | |
1996 | err = -EINVAL; | |
1997 | goto out; | |
1998 | } | |
1999 | ||
2000 | if (t32 > SIZEOF_SECURITY_HDR + 0x10000) { | |
e8b8e97f | 2001 | /* Looks like too big security. 0x10000 - is arbitrary big number. */ |
82cae269 KK |
2002 | err = -EFBIG; |
2003 | goto out; | |
2004 | } | |
2005 | ||
2006 | *size = t32 - SIZEOF_SECURITY_HDR; | |
2007 | ||
195c52bd | 2008 | p = kmalloc(*size, GFP_NOFS); |
82cae269 KK |
2009 | if (!p) { |
2010 | err = -ENOMEM; | |
2011 | goto out; | |
2012 | } | |
2013 | ||
2014 | err = ntfs_read_run_nb(sbi, &ni->file.run, | |
2015 | le64_to_cpu(sii_e->sec_hdr.off), &d_security, | |
2016 | sizeof(d_security), NULL); | |
2017 | if (err) | |
2018 | goto out; | |
2019 | ||
2020 | if (memcmp(&d_security, &sii_e->sec_hdr, SIZEOF_SECURITY_HDR)) { | |
2021 | err = -EINVAL; | |
2022 | goto out; | |
2023 | } | |
2024 | ||
2025 | err = ntfs_read_run_nb(sbi, &ni->file.run, | |
2026 | le64_to_cpu(sii_e->sec_hdr.off) + | |
2027 | SIZEOF_SECURITY_HDR, | |
2028 | p, *size, NULL); | |
2029 | if (err) | |
2030 | goto out; | |
2031 | ||
2032 | *sd = p; | |
2033 | p = NULL; | |
2034 | ||
2035 | out: | |
195c52bd | 2036 | kfree(p); |
82cae269 KK |
2037 | fnd_put(fnd_sii); |
2038 | ni_unlock(ni); | |
2039 | ||
2040 | return err; | |
2041 | } | |
2042 | ||
2043 | /* | |
e8b8e97f | 2044 | * ntfs_insert_security - Insert security descriptor into $Secure::SDS. |
82cae269 KK |
2045 | * |
2046 | * SECURITY Descriptor Stream data is organized into chunks of 256K bytes | |
2047 | * and it contains a mirror copy of each security descriptor. When writing | |
2048 | * to a security descriptor at location X, another copy will be written at | |
2049 | * location (X+256K). | |
2050 | * When writing a security descriptor that will cross the 256K boundary, | |
2051 | * the pointer will be advanced by 256K to skip | |
2052 | * over the mirror portion. | |
2053 | */ | |
2054 | int ntfs_insert_security(struct ntfs_sb_info *sbi, | |
2055 | const struct SECURITY_DESCRIPTOR_RELATIVE *sd, | |
2056 | u32 size_sd, __le32 *security_id, bool *inserted) | |
2057 | { | |
2058 | int err, diff; | |
2059 | struct ntfs_inode *ni = sbi->security.ni; | |
2060 | struct ntfs_index *indx_sdh = &sbi->security.index_sdh; | |
2061 | struct ntfs_index *indx_sii = &sbi->security.index_sii; | |
2062 | struct NTFS_DE_SDH *e; | |
2063 | struct NTFS_DE_SDH sdh_e; | |
2064 | struct NTFS_DE_SII sii_e; | |
2065 | struct SECURITY_HDR *d_security; | |
2066 | u32 new_sec_size = size_sd + SIZEOF_SECURITY_HDR; | |
fa3cacf5 | 2067 | u32 aligned_sec_size = ALIGN(new_sec_size, 16); |
82cae269 KK |
2068 | struct SECURITY_KEY hash_key; |
2069 | struct ntfs_fnd *fnd_sdh = NULL; | |
2070 | const struct INDEX_ROOT *root_sdh; | |
2071 | const struct INDEX_ROOT *root_sii; | |
2072 | u64 mirr_off, new_sds_size; | |
2073 | u32 next, left; | |
2074 | ||
2075 | static_assert((1 << Log2OfSecurityDescriptorsBlockSize) == | |
2076 | SecurityDescriptorsBlockSize); | |
2077 | ||
2078 | hash_key.hash = security_hash(sd, size_sd); | |
2079 | hash_key.sec_id = SECURITY_ID_INVALID; | |
2080 | ||
2081 | if (inserted) | |
2082 | *inserted = false; | |
2083 | *security_id = SECURITY_ID_INVALID; | |
2084 | ||
e8b8e97f | 2085 | /* Allocate a temporal buffer. */ |
195c52bd | 2086 | d_security = kzalloc(aligned_sec_size, GFP_NOFS); |
82cae269 KK |
2087 | if (!d_security) |
2088 | return -ENOMEM; | |
2089 | ||
2090 | mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_SECURITY); | |
2091 | ||
2092 | fnd_sdh = fnd_get(); | |
2093 | if (!fnd_sdh) { | |
2094 | err = -ENOMEM; | |
2095 | goto out; | |
2096 | } | |
2097 | ||
2098 | root_sdh = indx_get_root(indx_sdh, ni, NULL, NULL); | |
2099 | if (!root_sdh) { | |
2100 | err = -EINVAL; | |
2101 | goto out; | |
2102 | } | |
2103 | ||
2104 | root_sii = indx_get_root(indx_sii, ni, NULL, NULL); | |
2105 | if (!root_sii) { | |
2106 | err = -EINVAL; | |
2107 | goto out; | |
2108 | } | |
2109 | ||
2110 | /* | |
e8b8e97f KA |
2111 | * Check if such security already exists. |
2112 | * Use "SDH" and hash -> to get the offset in "SDS". | |
82cae269 KK |
2113 | */ |
2114 | err = indx_find(indx_sdh, ni, root_sdh, &hash_key, sizeof(hash_key), | |
2115 | &d_security->key.sec_id, &diff, (struct NTFS_DE **)&e, | |
2116 | fnd_sdh); | |
2117 | if (err) | |
2118 | goto out; | |
2119 | ||
2120 | while (e) { | |
2121 | if (le32_to_cpu(e->sec_hdr.size) == new_sec_size) { | |
2122 | err = ntfs_read_run_nb(sbi, &ni->file.run, | |
2123 | le64_to_cpu(e->sec_hdr.off), | |
2124 | d_security, new_sec_size, NULL); | |
2125 | if (err) | |
2126 | goto out; | |
2127 | ||
2128 | if (le32_to_cpu(d_security->size) == new_sec_size && | |
2129 | d_security->key.hash == hash_key.hash && | |
2130 | !memcmp(d_security + 1, sd, size_sd)) { | |
2131 | *security_id = d_security->key.sec_id; | |
e8b8e97f | 2132 | /* Such security already exists. */ |
82cae269 KK |
2133 | err = 0; |
2134 | goto out; | |
2135 | } | |
2136 | } | |
2137 | ||
2138 | err = indx_find_sort(indx_sdh, ni, root_sdh, | |
2139 | (struct NTFS_DE **)&e, fnd_sdh); | |
2140 | if (err) | |
2141 | goto out; | |
2142 | ||
2143 | if (!e || e->key.hash != hash_key.hash) | |
2144 | break; | |
2145 | } | |
2146 | ||
e8b8e97f | 2147 | /* Zero unused space. */ |
82cae269 KK |
2148 | next = sbi->security.next_off & (SecurityDescriptorsBlockSize - 1); |
2149 | left = SecurityDescriptorsBlockSize - next; | |
2150 | ||
e8b8e97f | 2151 | /* Zero gap until SecurityDescriptorsBlockSize. */ |
82cae269 | 2152 | if (left < new_sec_size) { |
e8b8e97f | 2153 | /* Zero "left" bytes from sbi->security.next_off. */ |
82cae269 KK |
2154 | sbi->security.next_off += SecurityDescriptorsBlockSize + left; |
2155 | } | |
2156 | ||
e8b8e97f | 2157 | /* Zero tail of previous security. */ |
82cae269 KK |
2158 | //used = ni->vfs_inode.i_size & (SecurityDescriptorsBlockSize - 1); |
2159 | ||
2160 | /* | |
2161 | * Example: | |
2162 | * 0x40438 == ni->vfs_inode.i_size | |
2163 | * 0x00440 == sbi->security.next_off | |
2164 | * need to zero [0x438-0x440) | |
2165 | * if (next > used) { | |
2166 | * u32 tozero = next - used; | |
2167 | * zero "tozero" bytes from sbi->security.next_off - tozero | |
2168 | */ | |
2169 | ||
e8b8e97f | 2170 | /* Format new security descriptor. */ |
82cae269 KK |
2171 | d_security->key.hash = hash_key.hash; |
2172 | d_security->key.sec_id = cpu_to_le32(sbi->security.next_id); | |
2173 | d_security->off = cpu_to_le64(sbi->security.next_off); | |
2174 | d_security->size = cpu_to_le32(new_sec_size); | |
2175 | memcpy(d_security + 1, sd, size_sd); | |
2176 | ||
e8b8e97f | 2177 | /* Write main SDS bucket. */ |
82cae269 | 2178 | err = ntfs_sb_write_run(sbi, &ni->file.run, sbi->security.next_off, |
63544672 | 2179 | d_security, aligned_sec_size, 0); |
82cae269 KK |
2180 | |
2181 | if (err) | |
2182 | goto out; | |
2183 | ||
2184 | mirr_off = sbi->security.next_off + SecurityDescriptorsBlockSize; | |
2185 | new_sds_size = mirr_off + aligned_sec_size; | |
2186 | ||
2187 | if (new_sds_size > ni->vfs_inode.i_size) { | |
2188 | err = attr_set_size(ni, ATTR_DATA, SDS_NAME, | |
2189 | ARRAY_SIZE(SDS_NAME), &ni->file.run, | |
2190 | new_sds_size, &new_sds_size, false, NULL); | |
2191 | if (err) | |
2192 | goto out; | |
2193 | } | |
2194 | ||
e8b8e97f | 2195 | /* Write copy SDS bucket. */ |
82cae269 | 2196 | err = ntfs_sb_write_run(sbi, &ni->file.run, mirr_off, d_security, |
63544672 | 2197 | aligned_sec_size, 0); |
82cae269 KK |
2198 | if (err) |
2199 | goto out; | |
2200 | ||
e8b8e97f | 2201 | /* Fill SII entry. */ |
82cae269 KK |
2202 | sii_e.de.view.data_off = |
2203 | cpu_to_le16(offsetof(struct NTFS_DE_SII, sec_hdr)); | |
2204 | sii_e.de.view.data_size = cpu_to_le16(SIZEOF_SECURITY_HDR); | |
2205 | sii_e.de.view.res = 0; | |
2206 | sii_e.de.size = cpu_to_le16(SIZEOF_SII_DIRENTRY); | |
2207 | sii_e.de.key_size = cpu_to_le16(sizeof(d_security->key.sec_id)); | |
2208 | sii_e.de.flags = 0; | |
2209 | sii_e.de.res = 0; | |
2210 | sii_e.sec_id = d_security->key.sec_id; | |
2211 | memcpy(&sii_e.sec_hdr, d_security, SIZEOF_SECURITY_HDR); | |
2212 | ||
78ab59fe | 2213 | err = indx_insert_entry(indx_sii, ni, &sii_e.de, NULL, NULL, 0); |
82cae269 KK |
2214 | if (err) |
2215 | goto out; | |
2216 | ||
e8b8e97f | 2217 | /* Fill SDH entry. */ |
82cae269 KK |
2218 | sdh_e.de.view.data_off = |
2219 | cpu_to_le16(offsetof(struct NTFS_DE_SDH, sec_hdr)); | |
2220 | sdh_e.de.view.data_size = cpu_to_le16(SIZEOF_SECURITY_HDR); | |
2221 | sdh_e.de.view.res = 0; | |
2222 | sdh_e.de.size = cpu_to_le16(SIZEOF_SDH_DIRENTRY); | |
2223 | sdh_e.de.key_size = cpu_to_le16(sizeof(sdh_e.key)); | |
2224 | sdh_e.de.flags = 0; | |
2225 | sdh_e.de.res = 0; | |
2226 | sdh_e.key.hash = d_security->key.hash; | |
2227 | sdh_e.key.sec_id = d_security->key.sec_id; | |
2228 | memcpy(&sdh_e.sec_hdr, d_security, SIZEOF_SECURITY_HDR); | |
2229 | sdh_e.magic[0] = cpu_to_le16('I'); | |
2230 | sdh_e.magic[1] = cpu_to_le16('I'); | |
2231 | ||
2232 | fnd_clear(fnd_sdh); | |
2233 | err = indx_insert_entry(indx_sdh, ni, &sdh_e.de, (void *)(size_t)1, | |
78ab59fe | 2234 | fnd_sdh, 0); |
82cae269 KK |
2235 | if (err) |
2236 | goto out; | |
2237 | ||
2238 | *security_id = d_security->key.sec_id; | |
2239 | if (inserted) | |
2240 | *inserted = true; | |
2241 | ||
e8b8e97f | 2242 | /* Update Id and offset for next descriptor. */ |
82cae269 KK |
2243 | sbi->security.next_id += 1; |
2244 | sbi->security.next_off += aligned_sec_size; | |
2245 | ||
2246 | out: | |
2247 | fnd_put(fnd_sdh); | |
2248 | mark_inode_dirty(&ni->vfs_inode); | |
2249 | ni_unlock(ni); | |
195c52bd | 2250 | kfree(d_security); |
82cae269 KK |
2251 | |
2252 | return err; | |
2253 | } | |
2254 | ||
2255 | /* | |
e8b8e97f | 2256 | * ntfs_reparse_init - Load and parse $Extend/$Reparse. |
82cae269 KK |
2257 | */ |
2258 | int ntfs_reparse_init(struct ntfs_sb_info *sbi) | |
2259 | { | |
2260 | int err; | |
2261 | struct ntfs_inode *ni = sbi->reparse.ni; | |
2262 | struct ntfs_index *indx = &sbi->reparse.index_r; | |
2263 | struct ATTRIB *attr; | |
2264 | struct ATTR_LIST_ENTRY *le; | |
2265 | const struct INDEX_ROOT *root_r; | |
2266 | ||
2267 | if (!ni) | |
2268 | return 0; | |
2269 | ||
2270 | le = NULL; | |
2271 | attr = ni_find_attr(ni, NULL, &le, ATTR_ROOT, SR_NAME, | |
2272 | ARRAY_SIZE(SR_NAME), NULL, NULL); | |
2273 | if (!attr) { | |
2274 | err = -EINVAL; | |
2275 | goto out; | |
2276 | } | |
2277 | ||
2278 | root_r = resident_data(attr); | |
2279 | if (root_r->type != ATTR_ZERO || | |
2280 | root_r->rule != NTFS_COLLATION_TYPE_UINTS) { | |
2281 | err = -EINVAL; | |
2282 | goto out; | |
2283 | } | |
2284 | ||
2285 | err = indx_init(indx, sbi, attr, INDEX_MUTEX_SR); | |
2286 | if (err) | |
2287 | goto out; | |
2288 | ||
2289 | out: | |
2290 | return err; | |
2291 | } | |
2292 | ||
2293 | /* | |
e8b8e97f | 2294 | * ntfs_objid_init - Load and parse $Extend/$ObjId. |
82cae269 KK |
2295 | */ |
2296 | int ntfs_objid_init(struct ntfs_sb_info *sbi) | |
2297 | { | |
2298 | int err; | |
2299 | struct ntfs_inode *ni = sbi->objid.ni; | |
2300 | struct ntfs_index *indx = &sbi->objid.index_o; | |
2301 | struct ATTRIB *attr; | |
2302 | struct ATTR_LIST_ENTRY *le; | |
2303 | const struct INDEX_ROOT *root; | |
2304 | ||
2305 | if (!ni) | |
2306 | return 0; | |
2307 | ||
2308 | le = NULL; | |
2309 | attr = ni_find_attr(ni, NULL, &le, ATTR_ROOT, SO_NAME, | |
2310 | ARRAY_SIZE(SO_NAME), NULL, NULL); | |
2311 | if (!attr) { | |
2312 | err = -EINVAL; | |
2313 | goto out; | |
2314 | } | |
2315 | ||
2316 | root = resident_data(attr); | |
2317 | if (root->type != ATTR_ZERO || | |
2318 | root->rule != NTFS_COLLATION_TYPE_UINTS) { | |
2319 | err = -EINVAL; | |
2320 | goto out; | |
2321 | } | |
2322 | ||
2323 | err = indx_init(indx, sbi, attr, INDEX_MUTEX_SO); | |
2324 | if (err) | |
2325 | goto out; | |
2326 | ||
2327 | out: | |
2328 | return err; | |
2329 | } | |
2330 | ||
2331 | int ntfs_objid_remove(struct ntfs_sb_info *sbi, struct GUID *guid) | |
2332 | { | |
2333 | int err; | |
2334 | struct ntfs_inode *ni = sbi->objid.ni; | |
2335 | struct ntfs_index *indx = &sbi->objid.index_o; | |
2336 | ||
2337 | if (!ni) | |
2338 | return -EINVAL; | |
2339 | ||
2340 | mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_OBJID); | |
2341 | ||
2342 | err = indx_delete_entry(indx, ni, guid, sizeof(*guid), NULL); | |
2343 | ||
2344 | mark_inode_dirty(&ni->vfs_inode); | |
2345 | ni_unlock(ni); | |
2346 | ||
2347 | return err; | |
2348 | } | |
2349 | ||
2350 | int ntfs_insert_reparse(struct ntfs_sb_info *sbi, __le32 rtag, | |
2351 | const struct MFT_REF *ref) | |
2352 | { | |
2353 | int err; | |
2354 | struct ntfs_inode *ni = sbi->reparse.ni; | |
2355 | struct ntfs_index *indx = &sbi->reparse.index_r; | |
2356 | struct NTFS_DE_R re; | |
2357 | ||
2358 | if (!ni) | |
2359 | return -EINVAL; | |
2360 | ||
2361 | memset(&re, 0, sizeof(re)); | |
2362 | ||
2363 | re.de.view.data_off = cpu_to_le16(offsetof(struct NTFS_DE_R, zero)); | |
2364 | re.de.size = cpu_to_le16(sizeof(struct NTFS_DE_R)); | |
2365 | re.de.key_size = cpu_to_le16(sizeof(re.key)); | |
2366 | ||
2367 | re.key.ReparseTag = rtag; | |
2368 | memcpy(&re.key.ref, ref, sizeof(*ref)); | |
2369 | ||
2370 | mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_REPARSE); | |
2371 | ||
78ab59fe | 2372 | err = indx_insert_entry(indx, ni, &re.de, NULL, NULL, 0); |
82cae269 KK |
2373 | |
2374 | mark_inode_dirty(&ni->vfs_inode); | |
2375 | ni_unlock(ni); | |
2376 | ||
2377 | return err; | |
2378 | } | |
2379 | ||
2380 | int ntfs_remove_reparse(struct ntfs_sb_info *sbi, __le32 rtag, | |
2381 | const struct MFT_REF *ref) | |
2382 | { | |
2383 | int err, diff; | |
2384 | struct ntfs_inode *ni = sbi->reparse.ni; | |
2385 | struct ntfs_index *indx = &sbi->reparse.index_r; | |
2386 | struct ntfs_fnd *fnd = NULL; | |
2387 | struct REPARSE_KEY rkey; | |
2388 | struct NTFS_DE_R *re; | |
2389 | struct INDEX_ROOT *root_r; | |
2390 | ||
2391 | if (!ni) | |
2392 | return -EINVAL; | |
2393 | ||
2394 | rkey.ReparseTag = rtag; | |
2395 | rkey.ref = *ref; | |
2396 | ||
2397 | mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_REPARSE); | |
2398 | ||
2399 | if (rtag) { | |
2400 | err = indx_delete_entry(indx, ni, &rkey, sizeof(rkey), NULL); | |
2401 | goto out1; | |
2402 | } | |
2403 | ||
2404 | fnd = fnd_get(); | |
2405 | if (!fnd) { | |
2406 | err = -ENOMEM; | |
2407 | goto out1; | |
2408 | } | |
2409 | ||
2410 | root_r = indx_get_root(indx, ni, NULL, NULL); | |
2411 | if (!root_r) { | |
2412 | err = -EINVAL; | |
2413 | goto out; | |
2414 | } | |
2415 | ||
e8b8e97f | 2416 | /* 1 - forces to ignore rkey.ReparseTag when comparing keys. */ |
82cae269 KK |
2417 | err = indx_find(indx, ni, root_r, &rkey, sizeof(rkey), (void *)1, &diff, |
2418 | (struct NTFS_DE **)&re, fnd); | |
2419 | if (err) | |
2420 | goto out; | |
2421 | ||
2422 | if (memcmp(&re->key.ref, ref, sizeof(*ref))) { | |
e8b8e97f | 2423 | /* Impossible. Looks like volume corrupt? */ |
82cae269 KK |
2424 | goto out; |
2425 | } | |
2426 | ||
2427 | memcpy(&rkey, &re->key, sizeof(rkey)); | |
2428 | ||
2429 | fnd_put(fnd); | |
2430 | fnd = NULL; | |
2431 | ||
2432 | err = indx_delete_entry(indx, ni, &rkey, sizeof(rkey), NULL); | |
2433 | if (err) | |
2434 | goto out; | |
2435 | ||
2436 | out: | |
2437 | fnd_put(fnd); | |
2438 | ||
2439 | out1: | |
2440 | mark_inode_dirty(&ni->vfs_inode); | |
2441 | ni_unlock(ni); | |
2442 | ||
2443 | return err; | |
2444 | } | |
2445 | ||
2446 | static inline void ntfs_unmap_and_discard(struct ntfs_sb_info *sbi, CLST lcn, | |
2447 | CLST len) | |
2448 | { | |
2449 | ntfs_unmap_meta(sbi->sb, lcn, len); | |
2450 | ntfs_discard(sbi, lcn, len); | |
2451 | } | |
2452 | ||
2453 | void mark_as_free_ex(struct ntfs_sb_info *sbi, CLST lcn, CLST len, bool trim) | |
2454 | { | |
8335ebe1 | 2455 | CLST end, i, zone_len, zlen; |
82cae269 KK |
2456 | struct wnd_bitmap *wnd = &sbi->used.bitmap; |
2457 | ||
2458 | down_write_nested(&wnd->rw_lock, BITMAP_MUTEX_CLUSTERS); | |
2459 | if (!wnd_is_used(wnd, lcn, len)) { | |
2460 | ntfs_set_state(sbi, NTFS_DIRTY_ERROR); | |
2461 | ||
2462 | end = lcn + len; | |
2463 | len = 0; | |
2464 | for (i = lcn; i < end; i++) { | |
2465 | if (wnd_is_used(wnd, i, 1)) { | |
2466 | if (!len) | |
2467 | lcn = i; | |
2468 | len += 1; | |
2469 | continue; | |
2470 | } | |
2471 | ||
2472 | if (!len) | |
2473 | continue; | |
2474 | ||
2475 | if (trim) | |
2476 | ntfs_unmap_and_discard(sbi, lcn, len); | |
2477 | ||
2478 | wnd_set_free(wnd, lcn, len); | |
2479 | len = 0; | |
2480 | } | |
2481 | ||
2482 | if (!len) | |
2483 | goto out; | |
2484 | } | |
2485 | ||
2486 | if (trim) | |
2487 | ntfs_unmap_and_discard(sbi, lcn, len); | |
2488 | wnd_set_free(wnd, lcn, len); | |
2489 | ||
8335ebe1 KK |
2490 | /* append to MFT zone, if possible. */ |
2491 | zone_len = wnd_zone_len(wnd); | |
2492 | zlen = min(zone_len + len, sbi->zone_max); | |
2493 | ||
2494 | if (zlen == zone_len) { | |
2495 | /* MFT zone already has maximum size. */ | |
2496 | } else if (!zone_len) { | |
8039edba KK |
2497 | /* Create MFT zone only if 'zlen' is large enough. */ |
2498 | if (zlen == sbi->zone_max) | |
2499 | wnd_zone_set(wnd, lcn, zlen); | |
8335ebe1 KK |
2500 | } else { |
2501 | CLST zone_lcn = wnd_zone_bit(wnd); | |
2502 | ||
2503 | if (lcn + len == zone_lcn) { | |
2504 | /* Append into head MFT zone. */ | |
2505 | wnd_zone_set(wnd, lcn, zlen); | |
2506 | } else if (zone_lcn + zone_len == lcn) { | |
2507 | /* Append into tail MFT zone. */ | |
2508 | wnd_zone_set(wnd, zone_lcn, zlen); | |
2509 | } | |
2510 | } | |
2511 | ||
82cae269 KK |
2512 | out: |
2513 | up_write(&wnd->rw_lock); | |
2514 | } | |
2515 | ||
2516 | /* | |
e8b8e97f | 2517 | * run_deallocate - Deallocate clusters. |
82cae269 KK |
2518 | */ |
2519 | int run_deallocate(struct ntfs_sb_info *sbi, struct runs_tree *run, bool trim) | |
2520 | { | |
2521 | CLST lcn, len; | |
2522 | size_t idx = 0; | |
2523 | ||
2524 | while (run_get_entry(run, idx++, NULL, &lcn, &len)) { | |
2525 | if (lcn == SPARSE_LCN) | |
2526 | continue; | |
2527 | ||
2528 | mark_as_free_ex(sbi, lcn, len, trim); | |
2529 | } | |
2530 | ||
2531 | return 0; | |
2532 | } | |
1d07a9df DP |
2533 | |
2534 | static inline bool name_has_forbidden_chars(const struct le_str *fname) | |
2535 | { | |
2536 | int i, ch; | |
2537 | ||
2538 | /* check for forbidden chars */ | |
2539 | for (i = 0; i < fname->len; ++i) { | |
2540 | ch = le16_to_cpu(fname->name[i]); | |
2541 | ||
2542 | /* control chars */ | |
2543 | if (ch < 0x20) | |
2544 | return true; | |
2545 | ||
2546 | switch (ch) { | |
2547 | /* disallowed by Windows */ | |
2548 | case '\\': | |
2549 | case '/': | |
2550 | case ':': | |
2551 | case '*': | |
2552 | case '?': | |
2553 | case '<': | |
2554 | case '>': | |
2555 | case '|': | |
2556 | case '\"': | |
2557 | return true; | |
2558 | ||
2559 | default: | |
2560 | /* allowed char */ | |
2561 | break; | |
2562 | } | |
2563 | } | |
2564 | ||
2565 | /* file names cannot end with space or . */ | |
2566 | if (fname->len > 0) { | |
2567 | ch = le16_to_cpu(fname->name[fname->len - 1]); | |
2568 | if (ch == ' ' || ch == '.') | |
2569 | return true; | |
2570 | } | |
2571 | ||
2572 | return false; | |
2573 | } | |
2574 | ||
2575 | static inline bool is_reserved_name(struct ntfs_sb_info *sbi, | |
2576 | const struct le_str *fname) | |
2577 | { | |
2578 | int port_digit; | |
2579 | const __le16 *name = fname->name; | |
2580 | int len = fname->len; | |
2581 | u16 *upcase = sbi->upcase; | |
2582 | ||
2583 | /* check for 3 chars reserved names (device names) */ | |
2584 | /* name by itself or with any extension is forbidden */ | |
2585 | if (len == 3 || (len > 3 && le16_to_cpu(name[3]) == '.')) | |
2586 | if (!ntfs_cmp_names(name, 3, CON_NAME, 3, upcase, false) || | |
2587 | !ntfs_cmp_names(name, 3, NUL_NAME, 3, upcase, false) || | |
2588 | !ntfs_cmp_names(name, 3, AUX_NAME, 3, upcase, false) || | |
2589 | !ntfs_cmp_names(name, 3, PRN_NAME, 3, upcase, false)) | |
2590 | return true; | |
2591 | ||
2592 | /* check for 4 chars reserved names (port name followed by 1..9) */ | |
2593 | /* name by itself or with any extension is forbidden */ | |
2594 | if (len == 4 || (len > 4 && le16_to_cpu(name[4]) == '.')) { | |
2595 | port_digit = le16_to_cpu(name[3]); | |
2596 | if (port_digit >= '1' && port_digit <= '9') | |
2597 | if (!ntfs_cmp_names(name, 3, COM_NAME, 3, upcase, false) || | |
2598 | !ntfs_cmp_names(name, 3, LPT_NAME, 3, upcase, false)) | |
2599 | return true; | |
2600 | } | |
2601 | ||
2602 | return false; | |
2603 | } | |
2604 | ||
2605 | /* | |
2606 | * valid_windows_name - Check if a file name is valid in Windows. | |
2607 | */ | |
2608 | bool valid_windows_name(struct ntfs_sb_info *sbi, const struct le_str *fname) | |
2609 | { | |
2610 | return !name_has_forbidden_chars(fname) && | |
2611 | !is_reserved_name(sbi, fname); | |
2612 | } |