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be71b5cb KK |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * | |
4 | * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. | |
5 | * | |
e8b8e97f | 6 | * TODO: Merge attr_set_size/attr_data_get_block/attr_allocate_frame? |
be71b5cb KK |
7 | */ |
8 | ||
be71b5cb | 9 | #include <linux/fs.h> |
be71b5cb | 10 | #include <linux/slab.h> |
6e3331ee | 11 | #include <linux/kernel.h> |
be71b5cb KK |
12 | |
13 | #include "debug.h" | |
14 | #include "ntfs.h" | |
15 | #include "ntfs_fs.h" | |
16 | ||
17 | /* | |
18 | * You can set external NTFS_MIN_LOG2_OF_CLUMP/NTFS_MAX_LOG2_OF_CLUMP to manage | |
e8b8e97f | 19 | * preallocate algorithm. |
be71b5cb KK |
20 | */ |
21 | #ifndef NTFS_MIN_LOG2_OF_CLUMP | |
22 | #define NTFS_MIN_LOG2_OF_CLUMP 16 | |
23 | #endif | |
24 | ||
25 | #ifndef NTFS_MAX_LOG2_OF_CLUMP | |
26 | #define NTFS_MAX_LOG2_OF_CLUMP 26 | |
27 | #endif | |
28 | ||
29 | // 16M | |
30 | #define NTFS_CLUMP_MIN (1 << (NTFS_MIN_LOG2_OF_CLUMP + 8)) | |
31 | // 16G | |
32 | #define NTFS_CLUMP_MAX (1ull << (NTFS_MAX_LOG2_OF_CLUMP + 8)) | |
33 | ||
be71b5cb KK |
34 | static inline u64 get_pre_allocated(u64 size) |
35 | { | |
36 | u32 clump; | |
37 | u8 align_shift; | |
38 | u64 ret; | |
39 | ||
40 | if (size <= NTFS_CLUMP_MIN) { | |
41 | clump = 1 << NTFS_MIN_LOG2_OF_CLUMP; | |
42 | align_shift = NTFS_MIN_LOG2_OF_CLUMP; | |
43 | } else if (size >= NTFS_CLUMP_MAX) { | |
44 | clump = 1 << NTFS_MAX_LOG2_OF_CLUMP; | |
45 | align_shift = NTFS_MAX_LOG2_OF_CLUMP; | |
46 | } else { | |
47 | align_shift = NTFS_MIN_LOG2_OF_CLUMP - 1 + | |
48 | __ffs(size >> (8 + NTFS_MIN_LOG2_OF_CLUMP)); | |
49 | clump = 1u << align_shift; | |
50 | } | |
51 | ||
52 | ret = (((size + clump - 1) >> align_shift)) << align_shift; | |
53 | ||
54 | return ret; | |
55 | } | |
56 | ||
57 | /* | |
58 | * attr_must_be_resident | |
59 | * | |
e8b8e97f | 60 | * Return: True if attribute must be resident. |
be71b5cb KK |
61 | */ |
62 | static inline bool attr_must_be_resident(struct ntfs_sb_info *sbi, | |
63 | enum ATTR_TYPE type) | |
64 | { | |
65 | const struct ATTR_DEF_ENTRY *de; | |
66 | ||
67 | switch (type) { | |
68 | case ATTR_STD: | |
69 | case ATTR_NAME: | |
70 | case ATTR_ID: | |
71 | case ATTR_LABEL: | |
72 | case ATTR_VOL_INFO: | |
73 | case ATTR_ROOT: | |
74 | case ATTR_EA_INFO: | |
75 | return true; | |
76 | default: | |
77 | de = ntfs_query_def(sbi, type); | |
78 | if (de && (de->flags & NTFS_ATTR_MUST_BE_RESIDENT)) | |
79 | return true; | |
80 | return false; | |
81 | } | |
82 | } | |
83 | ||
84 | /* | |
e8b8e97f | 85 | * attr_load_runs - Load all runs stored in @attr. |
be71b5cb KK |
86 | */ |
87 | int attr_load_runs(struct ATTRIB *attr, struct ntfs_inode *ni, | |
88 | struct runs_tree *run, const CLST *vcn) | |
89 | { | |
90 | int err; | |
91 | CLST svcn = le64_to_cpu(attr->nres.svcn); | |
92 | CLST evcn = le64_to_cpu(attr->nres.evcn); | |
93 | u32 asize; | |
94 | u16 run_off; | |
95 | ||
96 | if (svcn >= evcn + 1 || run_is_mapped_full(run, svcn, evcn)) | |
97 | return 0; | |
98 | ||
99 | if (vcn && (evcn < *vcn || *vcn < svcn)) | |
100 | return -EINVAL; | |
101 | ||
102 | asize = le32_to_cpu(attr->size); | |
103 | run_off = le16_to_cpu(attr->nres.run_off); | |
104 | err = run_unpack_ex(run, ni->mi.sbi, ni->mi.rno, svcn, evcn, | |
105 | vcn ? *vcn : svcn, Add2Ptr(attr, run_off), | |
106 | asize - run_off); | |
107 | if (err < 0) | |
108 | return err; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | /* | |
e8b8e97f | 114 | * run_deallocate_ex - Deallocate clusters. |
be71b5cb KK |
115 | */ |
116 | static int run_deallocate_ex(struct ntfs_sb_info *sbi, struct runs_tree *run, | |
117 | CLST vcn, CLST len, CLST *done, bool trim) | |
118 | { | |
119 | int err = 0; | |
120 | CLST vcn_next, vcn0 = vcn, lcn, clen, dn = 0; | |
121 | size_t idx; | |
122 | ||
123 | if (!len) | |
124 | goto out; | |
125 | ||
126 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) { | |
127 | failed: | |
128 | run_truncate(run, vcn0); | |
129 | err = -EINVAL; | |
130 | goto out; | |
131 | } | |
132 | ||
133 | for (;;) { | |
134 | if (clen > len) | |
135 | clen = len; | |
136 | ||
137 | if (!clen) { | |
138 | err = -EINVAL; | |
139 | goto out; | |
140 | } | |
141 | ||
142 | if (lcn != SPARSE_LCN) { | |
143 | mark_as_free_ex(sbi, lcn, clen, trim); | |
144 | dn += clen; | |
145 | } | |
146 | ||
147 | len -= clen; | |
148 | if (!len) | |
149 | break; | |
150 | ||
151 | vcn_next = vcn + clen; | |
152 | if (!run_get_entry(run, ++idx, &vcn, &lcn, &clen) || | |
153 | vcn != vcn_next) { | |
e8b8e97f | 154 | /* Save memory - don't load entire run. */ |
be71b5cb KK |
155 | goto failed; |
156 | } | |
157 | } | |
158 | ||
159 | out: | |
160 | if (done) | |
161 | *done += dn; | |
162 | ||
163 | return err; | |
164 | } | |
165 | ||
166 | /* | |
e8b8e97f | 167 | * attr_allocate_clusters - Find free space, mark it as used and store in @run. |
be71b5cb KK |
168 | */ |
169 | int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run, | |
170 | CLST vcn, CLST lcn, CLST len, CLST *pre_alloc, | |
171 | enum ALLOCATE_OPT opt, CLST *alen, const size_t fr, | |
172 | CLST *new_lcn) | |
173 | { | |
174 | int err; | |
175 | CLST flen, vcn0 = vcn, pre = pre_alloc ? *pre_alloc : 0; | |
176 | struct wnd_bitmap *wnd = &sbi->used.bitmap; | |
177 | size_t cnt = run->count; | |
178 | ||
179 | for (;;) { | |
180 | err = ntfs_look_for_free_space(sbi, lcn, len + pre, &lcn, &flen, | |
181 | opt); | |
182 | ||
183 | if (err == -ENOSPC && pre) { | |
184 | pre = 0; | |
185 | if (*pre_alloc) | |
186 | *pre_alloc = 0; | |
187 | continue; | |
188 | } | |
189 | ||
190 | if (err) | |
191 | goto out; | |
192 | ||
193 | if (new_lcn && vcn == vcn0) | |
194 | *new_lcn = lcn; | |
195 | ||
e8b8e97f | 196 | /* Add new fragment into run storage. */ |
be71b5cb | 197 | if (!run_add_entry(run, vcn, lcn, flen, opt == ALLOCATE_MFT)) { |
d3624466 | 198 | /* Undo last 'ntfs_look_for_free_space' */ |
be71b5cb KK |
199 | down_write_nested(&wnd->rw_lock, BITMAP_MUTEX_CLUSTERS); |
200 | wnd_set_free(wnd, lcn, flen); | |
201 | up_write(&wnd->rw_lock); | |
202 | err = -ENOMEM; | |
203 | goto out; | |
204 | } | |
205 | ||
206 | vcn += flen; | |
207 | ||
208 | if (flen >= len || opt == ALLOCATE_MFT || | |
209 | (fr && run->count - cnt >= fr)) { | |
210 | *alen = vcn - vcn0; | |
211 | return 0; | |
212 | } | |
213 | ||
214 | len -= flen; | |
215 | } | |
216 | ||
217 | out: | |
78ab59fe KK |
218 | /* Undo 'ntfs_look_for_free_space' */ |
219 | if (vcn - vcn0) { | |
220 | run_deallocate_ex(sbi, run, vcn0, vcn - vcn0, NULL, false); | |
221 | run_truncate(run, vcn0); | |
222 | } | |
be71b5cb KK |
223 | |
224 | return err; | |
225 | } | |
226 | ||
227 | /* | |
e8b8e97f KA |
228 | * attr_make_nonresident |
229 | * | |
230 | * If page is not NULL - it is already contains resident data | |
231 | * and locked (called from ni_write_frame()). | |
be71b5cb KK |
232 | */ |
233 | int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr, | |
234 | struct ATTR_LIST_ENTRY *le, struct mft_inode *mi, | |
235 | u64 new_size, struct runs_tree *run, | |
236 | struct ATTRIB **ins_attr, struct page *page) | |
237 | { | |
238 | struct ntfs_sb_info *sbi; | |
239 | struct ATTRIB *attr_s; | |
240 | struct MFT_REC *rec; | |
241 | u32 used, asize, rsize, aoff, align; | |
242 | bool is_data; | |
243 | CLST len, alen; | |
244 | char *next; | |
245 | int err; | |
246 | ||
247 | if (attr->non_res) { | |
248 | *ins_attr = attr; | |
249 | return 0; | |
250 | } | |
251 | ||
252 | sbi = mi->sbi; | |
253 | rec = mi->mrec; | |
254 | attr_s = NULL; | |
255 | used = le32_to_cpu(rec->used); | |
256 | asize = le32_to_cpu(attr->size); | |
257 | next = Add2Ptr(attr, asize); | |
258 | aoff = PtrOffset(rec, attr); | |
259 | rsize = le32_to_cpu(attr->res.data_size); | |
260 | is_data = attr->type == ATTR_DATA && !attr->name_len; | |
261 | ||
262 | align = sbi->cluster_size; | |
263 | if (is_attr_compressed(attr)) | |
264 | align <<= COMPRESSION_UNIT; | |
265 | len = (rsize + align - 1) >> sbi->cluster_bits; | |
266 | ||
267 | run_init(run); | |
268 | ||
e8b8e97f | 269 | /* Make a copy of original attribute. */ |
195c52bd | 270 | attr_s = kmemdup(attr, asize, GFP_NOFS); |
be71b5cb KK |
271 | if (!attr_s) { |
272 | err = -ENOMEM; | |
273 | goto out; | |
274 | } | |
275 | ||
276 | if (!len) { | |
e8b8e97f | 277 | /* Empty resident -> Empty nonresident. */ |
be71b5cb KK |
278 | alen = 0; |
279 | } else { | |
280 | const char *data = resident_data(attr); | |
281 | ||
282 | err = attr_allocate_clusters(sbi, run, 0, 0, len, NULL, | |
283 | ALLOCATE_DEF, &alen, 0, NULL); | |
284 | if (err) | |
285 | goto out1; | |
286 | ||
287 | if (!rsize) { | |
e8b8e97f | 288 | /* Empty resident -> Non empty nonresident. */ |
be71b5cb | 289 | } else if (!is_data) { |
63544672 | 290 | err = ntfs_sb_write_run(sbi, run, 0, data, rsize, 0); |
be71b5cb KK |
291 | if (err) |
292 | goto out2; | |
293 | } else if (!page) { | |
294 | char *kaddr; | |
295 | ||
296 | page = grab_cache_page(ni->vfs_inode.i_mapping, 0); | |
297 | if (!page) { | |
298 | err = -ENOMEM; | |
299 | goto out2; | |
300 | } | |
301 | kaddr = kmap_atomic(page); | |
302 | memcpy(kaddr, data, rsize); | |
303 | memset(kaddr + rsize, 0, PAGE_SIZE - rsize); | |
304 | kunmap_atomic(kaddr); | |
305 | flush_dcache_page(page); | |
306 | SetPageUptodate(page); | |
307 | set_page_dirty(page); | |
308 | unlock_page(page); | |
309 | put_page(page); | |
310 | } | |
311 | } | |
312 | ||
e8b8e97f | 313 | /* Remove original attribute. */ |
be71b5cb KK |
314 | used -= asize; |
315 | memmove(attr, Add2Ptr(attr, asize), used - aoff); | |
316 | rec->used = cpu_to_le32(used); | |
317 | mi->dirty = true; | |
318 | if (le) | |
319 | al_remove_le(ni, le); | |
320 | ||
321 | err = ni_insert_nonresident(ni, attr_s->type, attr_name(attr_s), | |
322 | attr_s->name_len, run, 0, alen, | |
323 | attr_s->flags, &attr, NULL); | |
324 | if (err) | |
325 | goto out3; | |
326 | ||
195c52bd | 327 | kfree(attr_s); |
be71b5cb KK |
328 | attr->nres.data_size = cpu_to_le64(rsize); |
329 | attr->nres.valid_size = attr->nres.data_size; | |
330 | ||
331 | *ins_attr = attr; | |
332 | ||
333 | if (is_data) | |
334 | ni->ni_flags &= ~NI_FLAG_RESIDENT; | |
335 | ||
e8b8e97f | 336 | /* Resident attribute becomes non resident. */ |
be71b5cb KK |
337 | return 0; |
338 | ||
339 | out3: | |
340 | attr = Add2Ptr(rec, aoff); | |
341 | memmove(next, attr, used - aoff); | |
342 | memcpy(attr, attr_s, asize); | |
343 | rec->used = cpu_to_le32(used + asize); | |
344 | mi->dirty = true; | |
345 | out2: | |
e8b8e97f | 346 | /* Undo: do not trim new allocated clusters. */ |
be71b5cb KK |
347 | run_deallocate(sbi, run, false); |
348 | run_close(run); | |
349 | out1: | |
195c52bd | 350 | kfree(attr_s); |
be71b5cb KK |
351 | out: |
352 | return err; | |
353 | } | |
354 | ||
355 | /* | |
e8b8e97f | 356 | * attr_set_size_res - Helper for attr_set_size(). |
be71b5cb KK |
357 | */ |
358 | static int attr_set_size_res(struct ntfs_inode *ni, struct ATTRIB *attr, | |
359 | struct ATTR_LIST_ENTRY *le, struct mft_inode *mi, | |
360 | u64 new_size, struct runs_tree *run, | |
361 | struct ATTRIB **ins_attr) | |
362 | { | |
363 | struct ntfs_sb_info *sbi = mi->sbi; | |
364 | struct MFT_REC *rec = mi->mrec; | |
365 | u32 used = le32_to_cpu(rec->used); | |
366 | u32 asize = le32_to_cpu(attr->size); | |
367 | u32 aoff = PtrOffset(rec, attr); | |
368 | u32 rsize = le32_to_cpu(attr->res.data_size); | |
369 | u32 tail = used - aoff - asize; | |
370 | char *next = Add2Ptr(attr, asize); | |
fa3cacf5 | 371 | s64 dsize = ALIGN(new_size, 8) - ALIGN(rsize, 8); |
be71b5cb KK |
372 | |
373 | if (dsize < 0) { | |
374 | memmove(next + dsize, next, tail); | |
375 | } else if (dsize > 0) { | |
376 | if (used + dsize > sbi->max_bytes_per_attr) | |
377 | return attr_make_nonresident(ni, attr, le, mi, new_size, | |
378 | run, ins_attr, NULL); | |
379 | ||
380 | memmove(next + dsize, next, tail); | |
381 | memset(next, 0, dsize); | |
382 | } | |
383 | ||
384 | if (new_size > rsize) | |
385 | memset(Add2Ptr(resident_data(attr), rsize), 0, | |
386 | new_size - rsize); | |
387 | ||
388 | rec->used = cpu_to_le32(used + dsize); | |
389 | attr->size = cpu_to_le32(asize + dsize); | |
390 | attr->res.data_size = cpu_to_le32(new_size); | |
391 | mi->dirty = true; | |
392 | *ins_attr = attr; | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | /* | |
e8b8e97f | 398 | * attr_set_size - Change the size of attribute. |
be71b5cb | 399 | * |
be71b5cb | 400 | * Extend: |
e8b8e97f KA |
401 | * - Sparse/compressed: No allocated clusters. |
402 | * - Normal: Append allocated and preallocated new clusters. | |
be71b5cb | 403 | * Shrink: |
e8b8e97f | 404 | * - No deallocate if @keep_prealloc is set. |
be71b5cb KK |
405 | */ |
406 | int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type, | |
407 | const __le16 *name, u8 name_len, struct runs_tree *run, | |
408 | u64 new_size, const u64 *new_valid, bool keep_prealloc, | |
409 | struct ATTRIB **ret) | |
410 | { | |
411 | int err = 0; | |
412 | struct ntfs_sb_info *sbi = ni->mi.sbi; | |
413 | u8 cluster_bits = sbi->cluster_bits; | |
414 | bool is_mft = | |
415 | ni->mi.rno == MFT_REC_MFT && type == ATTR_DATA && !name_len; | |
416 | u64 old_valid, old_size, old_alloc, new_alloc, new_alloc_tmp; | |
417 | struct ATTRIB *attr = NULL, *attr_b; | |
418 | struct ATTR_LIST_ENTRY *le, *le_b; | |
419 | struct mft_inode *mi, *mi_b; | |
420 | CLST alen, vcn, lcn, new_alen, old_alen, svcn, evcn; | |
421 | CLST next_svcn, pre_alloc = -1, done = 0; | |
422 | bool is_ext; | |
423 | u32 align; | |
424 | struct MFT_REC *rec; | |
425 | ||
426 | again: | |
427 | le_b = NULL; | |
428 | attr_b = ni_find_attr(ni, NULL, &le_b, type, name, name_len, NULL, | |
429 | &mi_b); | |
430 | if (!attr_b) { | |
431 | err = -ENOENT; | |
432 | goto out; | |
433 | } | |
434 | ||
435 | if (!attr_b->non_res) { | |
436 | err = attr_set_size_res(ni, attr_b, le_b, mi_b, new_size, run, | |
437 | &attr_b); | |
438 | if (err || !attr_b->non_res) | |
439 | goto out; | |
440 | ||
e8b8e97f | 441 | /* Layout of records may be changed, so do a full search. */ |
be71b5cb KK |
442 | goto again; |
443 | } | |
444 | ||
445 | is_ext = is_attr_ext(attr_b); | |
446 | ||
447 | again_1: | |
448 | align = sbi->cluster_size; | |
449 | ||
ce46ae0c | 450 | if (is_ext) |
be71b5cb | 451 | align <<= attr_b->nres.c_unit; |
be71b5cb KK |
452 | |
453 | old_valid = le64_to_cpu(attr_b->nres.valid_size); | |
454 | old_size = le64_to_cpu(attr_b->nres.data_size); | |
455 | old_alloc = le64_to_cpu(attr_b->nres.alloc_size); | |
456 | old_alen = old_alloc >> cluster_bits; | |
457 | ||
458 | new_alloc = (new_size + align - 1) & ~(u64)(align - 1); | |
459 | new_alen = new_alloc >> cluster_bits; | |
460 | ||
be71b5cb KK |
461 | if (keep_prealloc && new_size < old_size) { |
462 | attr_b->nres.data_size = cpu_to_le64(new_size); | |
463 | mi_b->dirty = true; | |
464 | goto ok; | |
465 | } | |
466 | ||
467 | vcn = old_alen - 1; | |
468 | ||
469 | svcn = le64_to_cpu(attr_b->nres.svcn); | |
470 | evcn = le64_to_cpu(attr_b->nres.evcn); | |
471 | ||
472 | if (svcn <= vcn && vcn <= evcn) { | |
473 | attr = attr_b; | |
474 | le = le_b; | |
475 | mi = mi_b; | |
476 | } else if (!le_b) { | |
477 | err = -EINVAL; | |
478 | goto out; | |
479 | } else { | |
480 | le = le_b; | |
481 | attr = ni_find_attr(ni, attr_b, &le, type, name, name_len, &vcn, | |
482 | &mi); | |
483 | if (!attr) { | |
484 | err = -EINVAL; | |
485 | goto out; | |
486 | } | |
487 | ||
488 | next_le_1: | |
489 | svcn = le64_to_cpu(attr->nres.svcn); | |
490 | evcn = le64_to_cpu(attr->nres.evcn); | |
491 | } | |
492 | ||
493 | next_le: | |
494 | rec = mi->mrec; | |
495 | ||
496 | err = attr_load_runs(attr, ni, run, NULL); | |
497 | if (err) | |
498 | goto out; | |
499 | ||
500 | if (new_size > old_size) { | |
501 | CLST to_allocate; | |
502 | size_t free; | |
503 | ||
504 | if (new_alloc <= old_alloc) { | |
505 | attr_b->nres.data_size = cpu_to_le64(new_size); | |
506 | mi_b->dirty = true; | |
507 | goto ok; | |
508 | } | |
509 | ||
510 | to_allocate = new_alen - old_alen; | |
511 | add_alloc_in_same_attr_seg: | |
512 | lcn = 0; | |
513 | if (is_mft) { | |
e8b8e97f | 514 | /* MFT allocates clusters from MFT zone. */ |
be71b5cb KK |
515 | pre_alloc = 0; |
516 | } else if (is_ext) { | |
e8b8e97f | 517 | /* No preallocate for sparse/compress. */ |
be71b5cb KK |
518 | pre_alloc = 0; |
519 | } else if (pre_alloc == -1) { | |
520 | pre_alloc = 0; | |
521 | if (type == ATTR_DATA && !name_len && | |
564c97bd | 522 | sbi->options->prealloc) { |
be71b5cb KK |
523 | CLST new_alen2 = bytes_to_cluster( |
524 | sbi, get_pre_allocated(new_size)); | |
525 | pre_alloc = new_alen2 - new_alen; | |
526 | } | |
527 | ||
e8b8e97f | 528 | /* Get the last LCN to allocate from. */ |
be71b5cb KK |
529 | if (old_alen && |
530 | !run_lookup_entry(run, vcn, &lcn, NULL, NULL)) { | |
531 | lcn = SPARSE_LCN; | |
532 | } | |
533 | ||
534 | if (lcn == SPARSE_LCN) | |
535 | lcn = 0; | |
536 | else if (lcn) | |
537 | lcn += 1; | |
538 | ||
539 | free = wnd_zeroes(&sbi->used.bitmap); | |
540 | if (to_allocate > free) { | |
541 | err = -ENOSPC; | |
542 | goto out; | |
543 | } | |
544 | ||
545 | if (pre_alloc && to_allocate + pre_alloc > free) | |
546 | pre_alloc = 0; | |
547 | } | |
548 | ||
549 | vcn = old_alen; | |
550 | ||
551 | if (is_ext) { | |
552 | if (!run_add_entry(run, vcn, SPARSE_LCN, to_allocate, | |
553 | false)) { | |
554 | err = -ENOMEM; | |
555 | goto out; | |
556 | } | |
557 | alen = to_allocate; | |
558 | } else { | |
e8b8e97f | 559 | /* ~3 bytes per fragment. */ |
be71b5cb KK |
560 | err = attr_allocate_clusters( |
561 | sbi, run, vcn, lcn, to_allocate, &pre_alloc, | |
562 | is_mft ? ALLOCATE_MFT : 0, &alen, | |
563 | is_mft ? 0 | |
564 | : (sbi->record_size - | |
565 | le32_to_cpu(rec->used) + 8) / | |
566 | 3 + | |
567 | 1, | |
568 | NULL); | |
569 | if (err) | |
570 | goto out; | |
571 | } | |
572 | ||
573 | done += alen; | |
574 | vcn += alen; | |
575 | if (to_allocate > alen) | |
576 | to_allocate -= alen; | |
577 | else | |
578 | to_allocate = 0; | |
579 | ||
580 | pack_runs: | |
581 | err = mi_pack_runs(mi, attr, run, vcn - svcn); | |
582 | if (err) | |
583 | goto out; | |
584 | ||
585 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; | |
586 | new_alloc_tmp = (u64)next_svcn << cluster_bits; | |
587 | attr_b->nres.alloc_size = cpu_to_le64(new_alloc_tmp); | |
588 | mi_b->dirty = true; | |
589 | ||
590 | if (next_svcn >= vcn && !to_allocate) { | |
e8b8e97f | 591 | /* Normal way. Update attribute and exit. */ |
be71b5cb KK |
592 | attr_b->nres.data_size = cpu_to_le64(new_size); |
593 | goto ok; | |
594 | } | |
595 | ||
e8b8e97f | 596 | /* At least two MFT to avoid recursive loop. */ |
be71b5cb KK |
597 | if (is_mft && next_svcn == vcn && |
598 | ((u64)done << sbi->cluster_bits) >= 2 * sbi->record_size) { | |
599 | new_size = new_alloc_tmp; | |
600 | attr_b->nres.data_size = attr_b->nres.alloc_size; | |
601 | goto ok; | |
602 | } | |
603 | ||
604 | if (le32_to_cpu(rec->used) < sbi->record_size) { | |
605 | old_alen = next_svcn; | |
606 | evcn = old_alen - 1; | |
607 | goto add_alloc_in_same_attr_seg; | |
608 | } | |
609 | ||
610 | attr_b->nres.data_size = attr_b->nres.alloc_size; | |
611 | if (new_alloc_tmp < old_valid) | |
612 | attr_b->nres.valid_size = attr_b->nres.data_size; | |
613 | ||
614 | if (type == ATTR_LIST) { | |
615 | err = ni_expand_list(ni); | |
616 | if (err) | |
617 | goto out; | |
618 | if (next_svcn < vcn) | |
619 | goto pack_runs; | |
620 | ||
e8b8e97f | 621 | /* Layout of records is changed. */ |
be71b5cb KK |
622 | goto again; |
623 | } | |
624 | ||
625 | if (!ni->attr_list.size) { | |
626 | err = ni_create_attr_list(ni); | |
627 | if (err) | |
628 | goto out; | |
e8b8e97f | 629 | /* Layout of records is changed. */ |
be71b5cb KK |
630 | } |
631 | ||
632 | if (next_svcn >= vcn) { | |
e8b8e97f | 633 | /* This is MFT data, repeat. */ |
be71b5cb KK |
634 | goto again; |
635 | } | |
636 | ||
e8b8e97f | 637 | /* Insert new attribute segment. */ |
be71b5cb KK |
638 | err = ni_insert_nonresident(ni, type, name, name_len, run, |
639 | next_svcn, vcn - next_svcn, | |
640 | attr_b->flags, &attr, &mi); | |
641 | if (err) | |
642 | goto out; | |
643 | ||
644 | if (!is_mft) | |
645 | run_truncate_head(run, evcn + 1); | |
646 | ||
647 | svcn = le64_to_cpu(attr->nres.svcn); | |
648 | evcn = le64_to_cpu(attr->nres.evcn); | |
649 | ||
650 | le_b = NULL; | |
e8b8e97f KA |
651 | /* |
652 | * Layout of records maybe changed. | |
653 | * Find base attribute to update. | |
654 | */ | |
be71b5cb KK |
655 | attr_b = ni_find_attr(ni, NULL, &le_b, type, name, name_len, |
656 | NULL, &mi_b); | |
657 | if (!attr_b) { | |
658 | err = -ENOENT; | |
659 | goto out; | |
660 | } | |
661 | ||
662 | attr_b->nres.alloc_size = cpu_to_le64((u64)vcn << cluster_bits); | |
663 | attr_b->nres.data_size = attr_b->nres.alloc_size; | |
664 | attr_b->nres.valid_size = attr_b->nres.alloc_size; | |
665 | mi_b->dirty = true; | |
666 | goto again_1; | |
667 | } | |
668 | ||
669 | if (new_size != old_size || | |
670 | (new_alloc != old_alloc && !keep_prealloc)) { | |
671 | vcn = max(svcn, new_alen); | |
672 | new_alloc_tmp = (u64)vcn << cluster_bits; | |
673 | ||
674 | alen = 0; | |
675 | err = run_deallocate_ex(sbi, run, vcn, evcn - vcn + 1, &alen, | |
676 | true); | |
677 | if (err) | |
678 | goto out; | |
679 | ||
680 | run_truncate(run, vcn); | |
681 | ||
682 | if (vcn > svcn) { | |
683 | err = mi_pack_runs(mi, attr, run, vcn - svcn); | |
684 | if (err) | |
685 | goto out; | |
686 | } else if (le && le->vcn) { | |
687 | u16 le_sz = le16_to_cpu(le->size); | |
688 | ||
689 | /* | |
e8b8e97f | 690 | * NOTE: List entries for one attribute are always |
be71b5cb KK |
691 | * the same size. We deal with last entry (vcn==0) |
692 | * and it is not first in entries array | |
e8b8e97f KA |
693 | * (list entry for std attribute always first). |
694 | * So it is safe to step back. | |
be71b5cb | 695 | */ |
78ab59fe | 696 | mi_remove_attr(NULL, mi, attr); |
be71b5cb KK |
697 | |
698 | if (!al_remove_le(ni, le)) { | |
699 | err = -EINVAL; | |
700 | goto out; | |
701 | } | |
702 | ||
703 | le = (struct ATTR_LIST_ENTRY *)((u8 *)le - le_sz); | |
704 | } else { | |
705 | attr->nres.evcn = cpu_to_le64((u64)vcn - 1); | |
706 | mi->dirty = true; | |
707 | } | |
708 | ||
709 | attr_b->nres.alloc_size = cpu_to_le64(new_alloc_tmp); | |
710 | ||
711 | if (vcn == new_alen) { | |
712 | attr_b->nres.data_size = cpu_to_le64(new_size); | |
713 | if (new_size < old_valid) | |
714 | attr_b->nres.valid_size = | |
715 | attr_b->nres.data_size; | |
716 | } else { | |
717 | if (new_alloc_tmp <= | |
718 | le64_to_cpu(attr_b->nres.data_size)) | |
719 | attr_b->nres.data_size = | |
720 | attr_b->nres.alloc_size; | |
721 | if (new_alloc_tmp < | |
722 | le64_to_cpu(attr_b->nres.valid_size)) | |
723 | attr_b->nres.valid_size = | |
724 | attr_b->nres.alloc_size; | |
725 | } | |
726 | ||
727 | if (is_ext) | |
728 | le64_sub_cpu(&attr_b->nres.total_size, | |
729 | ((u64)alen << cluster_bits)); | |
730 | ||
731 | mi_b->dirty = true; | |
732 | ||
733 | if (new_alloc_tmp <= new_alloc) | |
734 | goto ok; | |
735 | ||
736 | old_size = new_alloc_tmp; | |
737 | vcn = svcn - 1; | |
738 | ||
739 | if (le == le_b) { | |
740 | attr = attr_b; | |
741 | mi = mi_b; | |
742 | evcn = svcn - 1; | |
743 | svcn = 0; | |
744 | goto next_le; | |
745 | } | |
746 | ||
747 | if (le->type != type || le->name_len != name_len || | |
748 | memcmp(le_name(le), name, name_len * sizeof(short))) { | |
749 | err = -EINVAL; | |
750 | goto out; | |
751 | } | |
752 | ||
753 | err = ni_load_mi(ni, le, &mi); | |
754 | if (err) | |
755 | goto out; | |
756 | ||
757 | attr = mi_find_attr(mi, NULL, type, name, name_len, &le->id); | |
758 | if (!attr) { | |
759 | err = -EINVAL; | |
760 | goto out; | |
761 | } | |
762 | goto next_le_1; | |
763 | } | |
764 | ||
765 | ok: | |
766 | if (new_valid) { | |
767 | __le64 valid = cpu_to_le64(min(*new_valid, new_size)); | |
768 | ||
769 | if (attr_b->nres.valid_size != valid) { | |
770 | attr_b->nres.valid_size = valid; | |
771 | mi_b->dirty = true; | |
772 | } | |
773 | } | |
774 | ||
775 | out: | |
776 | if (!err && attr_b && ret) | |
777 | *ret = attr_b; | |
778 | ||
e8b8e97f | 779 | /* Update inode_set_bytes. */ |
be71b5cb KK |
780 | if (!err && ((type == ATTR_DATA && !name_len) || |
781 | (type == ATTR_ALLOC && name == I30_NAME))) { | |
782 | bool dirty = false; | |
783 | ||
784 | if (ni->vfs_inode.i_size != new_size) { | |
785 | ni->vfs_inode.i_size = new_size; | |
786 | dirty = true; | |
787 | } | |
788 | ||
789 | if (attr_b && attr_b->non_res) { | |
790 | new_alloc = le64_to_cpu(attr_b->nres.alloc_size); | |
791 | if (inode_get_bytes(&ni->vfs_inode) != new_alloc) { | |
792 | inode_set_bytes(&ni->vfs_inode, new_alloc); | |
793 | dirty = true; | |
794 | } | |
795 | } | |
796 | ||
797 | if (dirty) { | |
798 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; | |
799 | mark_inode_dirty(&ni->vfs_inode); | |
800 | } | |
801 | } | |
802 | ||
803 | return err; | |
804 | } | |
805 | ||
806 | int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn, | |
807 | CLST *len, bool *new) | |
808 | { | |
809 | int err = 0; | |
810 | struct runs_tree *run = &ni->file.run; | |
811 | struct ntfs_sb_info *sbi; | |
812 | u8 cluster_bits; | |
813 | struct ATTRIB *attr = NULL, *attr_b; | |
814 | struct ATTR_LIST_ENTRY *le, *le_b; | |
815 | struct mft_inode *mi, *mi_b; | |
816 | CLST hint, svcn, to_alloc, evcn1, next_svcn, asize, end; | |
817 | u64 total_size; | |
818 | u32 clst_per_frame; | |
819 | bool ok; | |
820 | ||
821 | if (new) | |
822 | *new = false; | |
823 | ||
824 | down_read(&ni->file.run_lock); | |
825 | ok = run_lookup_entry(run, vcn, lcn, len, NULL); | |
826 | up_read(&ni->file.run_lock); | |
827 | ||
828 | if (ok && (*lcn != SPARSE_LCN || !new)) { | |
e8b8e97f | 829 | /* Normal way. */ |
be71b5cb KK |
830 | return 0; |
831 | } | |
832 | ||
833 | if (!clen) | |
834 | clen = 1; | |
835 | ||
836 | if (ok && clen > *len) | |
837 | clen = *len; | |
838 | ||
839 | sbi = ni->mi.sbi; | |
840 | cluster_bits = sbi->cluster_bits; | |
841 | ||
842 | ni_lock(ni); | |
843 | down_write(&ni->file.run_lock); | |
844 | ||
845 | le_b = NULL; | |
846 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); | |
847 | if (!attr_b) { | |
848 | err = -ENOENT; | |
849 | goto out; | |
850 | } | |
851 | ||
852 | if (!attr_b->non_res) { | |
853 | *lcn = RESIDENT_LCN; | |
854 | *len = 1; | |
855 | goto out; | |
856 | } | |
857 | ||
858 | asize = le64_to_cpu(attr_b->nres.alloc_size) >> sbi->cluster_bits; | |
859 | if (vcn >= asize) { | |
860 | err = -EINVAL; | |
861 | goto out; | |
862 | } | |
863 | ||
864 | clst_per_frame = 1u << attr_b->nres.c_unit; | |
865 | to_alloc = (clen + clst_per_frame - 1) & ~(clst_per_frame - 1); | |
866 | ||
867 | if (vcn + to_alloc > asize) | |
868 | to_alloc = asize - vcn; | |
869 | ||
870 | svcn = le64_to_cpu(attr_b->nres.svcn); | |
871 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; | |
872 | ||
873 | attr = attr_b; | |
874 | le = le_b; | |
875 | mi = mi_b; | |
876 | ||
877 | if (le_b && (vcn < svcn || evcn1 <= vcn)) { | |
878 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, | |
879 | &mi); | |
880 | if (!attr) { | |
881 | err = -EINVAL; | |
882 | goto out; | |
883 | } | |
884 | svcn = le64_to_cpu(attr->nres.svcn); | |
885 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; | |
886 | } | |
887 | ||
888 | err = attr_load_runs(attr, ni, run, NULL); | |
889 | if (err) | |
890 | goto out; | |
891 | ||
892 | if (!ok) { | |
893 | ok = run_lookup_entry(run, vcn, lcn, len, NULL); | |
894 | if (ok && (*lcn != SPARSE_LCN || !new)) { | |
e8b8e97f | 895 | /* Normal way. */ |
be71b5cb KK |
896 | err = 0; |
897 | goto ok; | |
898 | } | |
899 | ||
900 | if (!ok && !new) { | |
901 | *len = 0; | |
902 | err = 0; | |
903 | goto ok; | |
904 | } | |
905 | ||
906 | if (ok && clen > *len) { | |
907 | clen = *len; | |
908 | to_alloc = (clen + clst_per_frame - 1) & | |
909 | ~(clst_per_frame - 1); | |
910 | } | |
911 | } | |
912 | ||
913 | if (!is_attr_ext(attr_b)) { | |
914 | err = -EINVAL; | |
915 | goto out; | |
916 | } | |
917 | ||
e8b8e97f | 918 | /* Get the last LCN to allocate from. */ |
be71b5cb KK |
919 | hint = 0; |
920 | ||
921 | if (vcn > evcn1) { | |
922 | if (!run_add_entry(run, evcn1, SPARSE_LCN, vcn - evcn1, | |
923 | false)) { | |
924 | err = -ENOMEM; | |
925 | goto out; | |
926 | } | |
927 | } else if (vcn && !run_lookup_entry(run, vcn - 1, &hint, NULL, NULL)) { | |
928 | hint = -1; | |
929 | } | |
930 | ||
931 | err = attr_allocate_clusters( | |
932 | sbi, run, vcn, hint + 1, to_alloc, NULL, 0, len, | |
933 | (sbi->record_size - le32_to_cpu(mi->mrec->used) + 8) / 3 + 1, | |
934 | lcn); | |
935 | if (err) | |
936 | goto out; | |
937 | *new = true; | |
938 | ||
939 | end = vcn + *len; | |
940 | ||
941 | total_size = le64_to_cpu(attr_b->nres.total_size) + | |
942 | ((u64)*len << cluster_bits); | |
943 | ||
944 | repack: | |
945 | err = mi_pack_runs(mi, attr, run, max(end, evcn1) - svcn); | |
946 | if (err) | |
947 | goto out; | |
948 | ||
949 | attr_b->nres.total_size = cpu_to_le64(total_size); | |
950 | inode_set_bytes(&ni->vfs_inode, total_size); | |
951 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; | |
952 | ||
953 | mi_b->dirty = true; | |
954 | mark_inode_dirty(&ni->vfs_inode); | |
955 | ||
e8b8e97f | 956 | /* Stored [vcn : next_svcn) from [vcn : end). */ |
be71b5cb KK |
957 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
958 | ||
959 | if (end <= evcn1) { | |
960 | if (next_svcn == evcn1) { | |
e8b8e97f | 961 | /* Normal way. Update attribute and exit. */ |
be71b5cb KK |
962 | goto ok; |
963 | } | |
e8b8e97f | 964 | /* Add new segment [next_svcn : evcn1 - next_svcn). */ |
be71b5cb KK |
965 | if (!ni->attr_list.size) { |
966 | err = ni_create_attr_list(ni); | |
967 | if (err) | |
968 | goto out; | |
e8b8e97f | 969 | /* Layout of records is changed. */ |
be71b5cb KK |
970 | le_b = NULL; |
971 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, | |
972 | 0, NULL, &mi_b); | |
973 | if (!attr_b) { | |
974 | err = -ENOENT; | |
975 | goto out; | |
976 | } | |
977 | ||
978 | attr = attr_b; | |
979 | le = le_b; | |
980 | mi = mi_b; | |
981 | goto repack; | |
982 | } | |
983 | } | |
984 | ||
985 | svcn = evcn1; | |
986 | ||
e8b8e97f | 987 | /* Estimate next attribute. */ |
be71b5cb KK |
988 | attr = ni_find_attr(ni, attr, &le, ATTR_DATA, NULL, 0, &svcn, &mi); |
989 | ||
990 | if (attr) { | |
991 | CLST alloc = bytes_to_cluster( | |
992 | sbi, le64_to_cpu(attr_b->nres.alloc_size)); | |
993 | CLST evcn = le64_to_cpu(attr->nres.evcn); | |
994 | ||
995 | if (end < next_svcn) | |
996 | end = next_svcn; | |
997 | while (end > evcn) { | |
e8b8e97f | 998 | /* Remove segment [svcn : evcn). */ |
78ab59fe | 999 | mi_remove_attr(NULL, mi, attr); |
be71b5cb KK |
1000 | |
1001 | if (!al_remove_le(ni, le)) { | |
1002 | err = -EINVAL; | |
1003 | goto out; | |
1004 | } | |
1005 | ||
1006 | if (evcn + 1 >= alloc) { | |
e8b8e97f | 1007 | /* Last attribute segment. */ |
be71b5cb KK |
1008 | evcn1 = evcn + 1; |
1009 | goto ins_ext; | |
1010 | } | |
1011 | ||
1012 | if (ni_load_mi(ni, le, &mi)) { | |
1013 | attr = NULL; | |
1014 | goto out; | |
1015 | } | |
1016 | ||
1017 | attr = mi_find_attr(mi, NULL, ATTR_DATA, NULL, 0, | |
1018 | &le->id); | |
1019 | if (!attr) { | |
1020 | err = -EINVAL; | |
1021 | goto out; | |
1022 | } | |
1023 | svcn = le64_to_cpu(attr->nres.svcn); | |
1024 | evcn = le64_to_cpu(attr->nres.evcn); | |
1025 | } | |
1026 | ||
1027 | if (end < svcn) | |
1028 | end = svcn; | |
1029 | ||
1030 | err = attr_load_runs(attr, ni, run, &end); | |
1031 | if (err) | |
1032 | goto out; | |
1033 | ||
1034 | evcn1 = evcn + 1; | |
1035 | attr->nres.svcn = cpu_to_le64(next_svcn); | |
1036 | err = mi_pack_runs(mi, attr, run, evcn1 - next_svcn); | |
1037 | if (err) | |
1038 | goto out; | |
1039 | ||
1040 | le->vcn = cpu_to_le64(next_svcn); | |
1041 | ni->attr_list.dirty = true; | |
1042 | mi->dirty = true; | |
1043 | ||
1044 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; | |
1045 | } | |
1046 | ins_ext: | |
1047 | if (evcn1 > next_svcn) { | |
1048 | err = ni_insert_nonresident(ni, ATTR_DATA, NULL, 0, run, | |
1049 | next_svcn, evcn1 - next_svcn, | |
1050 | attr_b->flags, &attr, &mi); | |
1051 | if (err) | |
1052 | goto out; | |
1053 | } | |
1054 | ok: | |
1055 | run_truncate_around(run, vcn); | |
1056 | out: | |
1057 | up_write(&ni->file.run_lock); | |
1058 | ni_unlock(ni); | |
1059 | ||
1060 | return err; | |
1061 | } | |
1062 | ||
1063 | int attr_data_read_resident(struct ntfs_inode *ni, struct page *page) | |
1064 | { | |
1065 | u64 vbo; | |
1066 | struct ATTRIB *attr; | |
1067 | u32 data_size; | |
1068 | ||
1069 | attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL, NULL); | |
1070 | if (!attr) | |
1071 | return -EINVAL; | |
1072 | ||
1073 | if (attr->non_res) | |
1074 | return E_NTFS_NONRESIDENT; | |
1075 | ||
1076 | vbo = page->index << PAGE_SHIFT; | |
1077 | data_size = le32_to_cpu(attr->res.data_size); | |
1078 | if (vbo < data_size) { | |
1079 | const char *data = resident_data(attr); | |
1080 | char *kaddr = kmap_atomic(page); | |
1081 | u32 use = data_size - vbo; | |
1082 | ||
1083 | if (use > PAGE_SIZE) | |
1084 | use = PAGE_SIZE; | |
1085 | ||
1086 | memcpy(kaddr, data + vbo, use); | |
1087 | memset(kaddr + use, 0, PAGE_SIZE - use); | |
1088 | kunmap_atomic(kaddr); | |
1089 | flush_dcache_page(page); | |
1090 | SetPageUptodate(page); | |
1091 | } else if (!PageUptodate(page)) { | |
1092 | zero_user_segment(page, 0, PAGE_SIZE); | |
1093 | SetPageUptodate(page); | |
1094 | } | |
1095 | ||
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | int attr_data_write_resident(struct ntfs_inode *ni, struct page *page) | |
1100 | { | |
1101 | u64 vbo; | |
1102 | struct mft_inode *mi; | |
1103 | struct ATTRIB *attr; | |
1104 | u32 data_size; | |
1105 | ||
1106 | attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL, &mi); | |
1107 | if (!attr) | |
1108 | return -EINVAL; | |
1109 | ||
1110 | if (attr->non_res) { | |
e8b8e97f | 1111 | /* Return special error code to check this case. */ |
be71b5cb KK |
1112 | return E_NTFS_NONRESIDENT; |
1113 | } | |
1114 | ||
1115 | vbo = page->index << PAGE_SHIFT; | |
1116 | data_size = le32_to_cpu(attr->res.data_size); | |
1117 | if (vbo < data_size) { | |
1118 | char *data = resident_data(attr); | |
1119 | char *kaddr = kmap_atomic(page); | |
1120 | u32 use = data_size - vbo; | |
1121 | ||
1122 | if (use > PAGE_SIZE) | |
1123 | use = PAGE_SIZE; | |
1124 | memcpy(data + vbo, kaddr, use); | |
1125 | kunmap_atomic(kaddr); | |
1126 | mi->dirty = true; | |
1127 | } | |
1128 | ni->i_valid = data_size; | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | /* | |
e8b8e97f | 1134 | * attr_load_runs_vcn - Load runs with VCN. |
be71b5cb KK |
1135 | */ |
1136 | int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type, | |
1137 | const __le16 *name, u8 name_len, struct runs_tree *run, | |
1138 | CLST vcn) | |
1139 | { | |
1140 | struct ATTRIB *attr; | |
1141 | int err; | |
1142 | CLST svcn, evcn; | |
1143 | u16 ro; | |
1144 | ||
1145 | attr = ni_find_attr(ni, NULL, NULL, type, name, name_len, &vcn, NULL); | |
d3624466 KK |
1146 | if (!attr) { |
1147 | /* Is record corrupted? */ | |
be71b5cb | 1148 | return -ENOENT; |
d3624466 | 1149 | } |
be71b5cb KK |
1150 | |
1151 | svcn = le64_to_cpu(attr->nres.svcn); | |
1152 | evcn = le64_to_cpu(attr->nres.evcn); | |
1153 | ||
d3624466 KK |
1154 | if (evcn < vcn || vcn < svcn) { |
1155 | /* Is record corrupted? */ | |
be71b5cb | 1156 | return -EINVAL; |
d3624466 | 1157 | } |
be71b5cb KK |
1158 | |
1159 | ro = le16_to_cpu(attr->nres.run_off); | |
1160 | err = run_unpack_ex(run, ni->mi.sbi, ni->mi.rno, svcn, evcn, svcn, | |
1161 | Add2Ptr(attr, ro), le32_to_cpu(attr->size) - ro); | |
1162 | if (err < 0) | |
1163 | return err; | |
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | /* | |
d3624466 | 1168 | * attr_load_runs_range - Load runs for given range [from to). |
be71b5cb KK |
1169 | */ |
1170 | int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type, | |
1171 | const __le16 *name, u8 name_len, struct runs_tree *run, | |
1172 | u64 from, u64 to) | |
1173 | { | |
1174 | struct ntfs_sb_info *sbi = ni->mi.sbi; | |
1175 | u8 cluster_bits = sbi->cluster_bits; | |
1176 | CLST vcn = from >> cluster_bits; | |
1177 | CLST vcn_last = (to - 1) >> cluster_bits; | |
1178 | CLST lcn, clen; | |
1179 | int err; | |
1180 | ||
1181 | for (vcn = from >> cluster_bits; vcn <= vcn_last; vcn += clen) { | |
1182 | if (!run_lookup_entry(run, vcn, &lcn, &clen, NULL)) { | |
1183 | err = attr_load_runs_vcn(ni, type, name, name_len, run, | |
1184 | vcn); | |
1185 | if (err) | |
1186 | return err; | |
e8b8e97f | 1187 | clen = 0; /* Next run_lookup_entry(vcn) must be success. */ |
be71b5cb KK |
1188 | } |
1189 | } | |
1190 | ||
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | #ifdef CONFIG_NTFS3_LZX_XPRESS | |
1195 | /* | |
1196 | * attr_wof_frame_info | |
1197 | * | |
e8b8e97f | 1198 | * Read header of Xpress/LZX file to get info about frame. |
be71b5cb KK |
1199 | */ |
1200 | int attr_wof_frame_info(struct ntfs_inode *ni, struct ATTRIB *attr, | |
1201 | struct runs_tree *run, u64 frame, u64 frames, | |
1202 | u8 frame_bits, u32 *ondisk_size, u64 *vbo_data) | |
1203 | { | |
1204 | struct ntfs_sb_info *sbi = ni->mi.sbi; | |
1205 | u64 vbo[2], off[2], wof_size; | |
1206 | u32 voff; | |
1207 | u8 bytes_per_off; | |
1208 | char *addr; | |
1209 | struct page *page; | |
1210 | int i, err; | |
1211 | __le32 *off32; | |
1212 | __le64 *off64; | |
1213 | ||
1214 | if (ni->vfs_inode.i_size < 0x100000000ull) { | |
e8b8e97f | 1215 | /* File starts with array of 32 bit offsets. */ |
be71b5cb KK |
1216 | bytes_per_off = sizeof(__le32); |
1217 | vbo[1] = frame << 2; | |
1218 | *vbo_data = frames << 2; | |
1219 | } else { | |
e8b8e97f | 1220 | /* File starts with array of 64 bit offsets. */ |
be71b5cb KK |
1221 | bytes_per_off = sizeof(__le64); |
1222 | vbo[1] = frame << 3; | |
1223 | *vbo_data = frames << 3; | |
1224 | } | |
1225 | ||
1226 | /* | |
e8b8e97f KA |
1227 | * Read 4/8 bytes at [vbo - 4(8)] == offset where compressed frame starts. |
1228 | * Read 4/8 bytes at [vbo] == offset where compressed frame ends. | |
be71b5cb KK |
1229 | */ |
1230 | if (!attr->non_res) { | |
1231 | if (vbo[1] + bytes_per_off > le32_to_cpu(attr->res.data_size)) { | |
1232 | ntfs_inode_err(&ni->vfs_inode, "is corrupted"); | |
1233 | return -EINVAL; | |
1234 | } | |
1235 | addr = resident_data(attr); | |
1236 | ||
1237 | if (bytes_per_off == sizeof(__le32)) { | |
1238 | off32 = Add2Ptr(addr, vbo[1]); | |
1239 | off[0] = vbo[1] ? le32_to_cpu(off32[-1]) : 0; | |
1240 | off[1] = le32_to_cpu(off32[0]); | |
1241 | } else { | |
1242 | off64 = Add2Ptr(addr, vbo[1]); | |
1243 | off[0] = vbo[1] ? le64_to_cpu(off64[-1]) : 0; | |
1244 | off[1] = le64_to_cpu(off64[0]); | |
1245 | } | |
1246 | ||
1247 | *vbo_data += off[0]; | |
1248 | *ondisk_size = off[1] - off[0]; | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | wof_size = le64_to_cpu(attr->nres.data_size); | |
1253 | down_write(&ni->file.run_lock); | |
1254 | page = ni->file.offs_page; | |
1255 | if (!page) { | |
1256 | page = alloc_page(GFP_KERNEL); | |
1257 | if (!page) { | |
1258 | err = -ENOMEM; | |
1259 | goto out; | |
1260 | } | |
1261 | page->index = -1; | |
1262 | ni->file.offs_page = page; | |
1263 | } | |
1264 | lock_page(page); | |
1265 | addr = page_address(page); | |
1266 | ||
1267 | if (vbo[1]) { | |
1268 | voff = vbo[1] & (PAGE_SIZE - 1); | |
1269 | vbo[0] = vbo[1] - bytes_per_off; | |
1270 | i = 0; | |
1271 | } else { | |
1272 | voff = 0; | |
1273 | vbo[0] = 0; | |
1274 | off[0] = 0; | |
1275 | i = 1; | |
1276 | } | |
1277 | ||
1278 | do { | |
1279 | pgoff_t index = vbo[i] >> PAGE_SHIFT; | |
1280 | ||
1281 | if (index != page->index) { | |
1282 | u64 from = vbo[i] & ~(u64)(PAGE_SIZE - 1); | |
1283 | u64 to = min(from + PAGE_SIZE, wof_size); | |
1284 | ||
1285 | err = attr_load_runs_range(ni, ATTR_DATA, WOF_NAME, | |
1286 | ARRAY_SIZE(WOF_NAME), run, | |
1287 | from, to); | |
1288 | if (err) | |
1289 | goto out1; | |
1290 | ||
1291 | err = ntfs_bio_pages(sbi, run, &page, 1, from, | |
1292 | to - from, REQ_OP_READ); | |
1293 | if (err) { | |
1294 | page->index = -1; | |
1295 | goto out1; | |
1296 | } | |
1297 | page->index = index; | |
1298 | } | |
1299 | ||
1300 | if (i) { | |
1301 | if (bytes_per_off == sizeof(__le32)) { | |
1302 | off32 = Add2Ptr(addr, voff); | |
1303 | off[1] = le32_to_cpu(*off32); | |
1304 | } else { | |
1305 | off64 = Add2Ptr(addr, voff); | |
1306 | off[1] = le64_to_cpu(*off64); | |
1307 | } | |
1308 | } else if (!voff) { | |
1309 | if (bytes_per_off == sizeof(__le32)) { | |
1310 | off32 = Add2Ptr(addr, PAGE_SIZE - sizeof(u32)); | |
1311 | off[0] = le32_to_cpu(*off32); | |
1312 | } else { | |
1313 | off64 = Add2Ptr(addr, PAGE_SIZE - sizeof(u64)); | |
1314 | off[0] = le64_to_cpu(*off64); | |
1315 | } | |
1316 | } else { | |
e8b8e97f | 1317 | /* Two values in one page. */ |
be71b5cb KK |
1318 | if (bytes_per_off == sizeof(__le32)) { |
1319 | off32 = Add2Ptr(addr, voff); | |
1320 | off[0] = le32_to_cpu(off32[-1]); | |
1321 | off[1] = le32_to_cpu(off32[0]); | |
1322 | } else { | |
1323 | off64 = Add2Ptr(addr, voff); | |
1324 | off[0] = le64_to_cpu(off64[-1]); | |
1325 | off[1] = le64_to_cpu(off64[0]); | |
1326 | } | |
1327 | break; | |
1328 | } | |
1329 | } while (++i < 2); | |
1330 | ||
1331 | *vbo_data += off[0]; | |
1332 | *ondisk_size = off[1] - off[0]; | |
1333 | ||
1334 | out1: | |
1335 | unlock_page(page); | |
1336 | out: | |
1337 | up_write(&ni->file.run_lock); | |
1338 | return err; | |
1339 | } | |
1340 | #endif | |
1341 | ||
1342 | /* | |
e8b8e97f | 1343 | * attr_is_frame_compressed - Used to detect compressed frame. |
be71b5cb KK |
1344 | */ |
1345 | int attr_is_frame_compressed(struct ntfs_inode *ni, struct ATTRIB *attr, | |
1346 | CLST frame, CLST *clst_data) | |
1347 | { | |
1348 | int err; | |
1349 | u32 clst_frame; | |
1350 | CLST clen, lcn, vcn, alen, slen, vcn_next; | |
1351 | size_t idx; | |
1352 | struct runs_tree *run; | |
1353 | ||
1354 | *clst_data = 0; | |
1355 | ||
1356 | if (!is_attr_compressed(attr)) | |
1357 | return 0; | |
1358 | ||
1359 | if (!attr->non_res) | |
1360 | return 0; | |
1361 | ||
1362 | clst_frame = 1u << attr->nres.c_unit; | |
1363 | vcn = frame * clst_frame; | |
1364 | run = &ni->file.run; | |
1365 | ||
1366 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) { | |
1367 | err = attr_load_runs_vcn(ni, attr->type, attr_name(attr), | |
1368 | attr->name_len, run, vcn); | |
1369 | if (err) | |
1370 | return err; | |
1371 | ||
1372 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) | |
1373 | return -EINVAL; | |
1374 | } | |
1375 | ||
1376 | if (lcn == SPARSE_LCN) { | |
e8b8e97f | 1377 | /* Sparsed frame. */ |
be71b5cb KK |
1378 | return 0; |
1379 | } | |
1380 | ||
1381 | if (clen >= clst_frame) { | |
1382 | /* | |
1383 | * The frame is not compressed 'cause | |
e8b8e97f | 1384 | * it does not contain any sparse clusters. |
be71b5cb KK |
1385 | */ |
1386 | *clst_data = clst_frame; | |
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | alen = bytes_to_cluster(ni->mi.sbi, le64_to_cpu(attr->nres.alloc_size)); | |
1391 | slen = 0; | |
1392 | *clst_data = clen; | |
1393 | ||
1394 | /* | |
e8b8e97f KA |
1395 | * The frame is compressed if *clst_data + slen >= clst_frame. |
1396 | * Check next fragments. | |
be71b5cb KK |
1397 | */ |
1398 | while ((vcn += clen) < alen) { | |
1399 | vcn_next = vcn; | |
1400 | ||
1401 | if (!run_get_entry(run, ++idx, &vcn, &lcn, &clen) || | |
1402 | vcn_next != vcn) { | |
1403 | err = attr_load_runs_vcn(ni, attr->type, | |
1404 | attr_name(attr), | |
1405 | attr->name_len, run, vcn_next); | |
1406 | if (err) | |
1407 | return err; | |
1408 | vcn = vcn_next; | |
1409 | ||
1410 | if (!run_lookup_entry(run, vcn, &lcn, &clen, &idx)) | |
1411 | return -EINVAL; | |
1412 | } | |
1413 | ||
1414 | if (lcn == SPARSE_LCN) { | |
1415 | slen += clen; | |
1416 | } else { | |
1417 | if (slen) { | |
1418 | /* | |
e8b8e97f KA |
1419 | * Data_clusters + sparse_clusters = |
1420 | * not enough for frame. | |
be71b5cb KK |
1421 | */ |
1422 | return -EINVAL; | |
1423 | } | |
1424 | *clst_data += clen; | |
1425 | } | |
1426 | ||
1427 | if (*clst_data + slen >= clst_frame) { | |
1428 | if (!slen) { | |
1429 | /* | |
1430 | * There is no sparsed clusters in this frame | |
e8b8e97f | 1431 | * so it is not compressed. |
be71b5cb KK |
1432 | */ |
1433 | *clst_data = clst_frame; | |
1434 | } else { | |
e8b8e97f | 1435 | /* Frame is compressed. */ |
be71b5cb KK |
1436 | } |
1437 | break; | |
1438 | } | |
1439 | } | |
1440 | ||
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | /* | |
e8b8e97f | 1445 | * attr_allocate_frame - Allocate/free clusters for @frame. |
be71b5cb | 1446 | * |
e8b8e97f | 1447 | * Assumed: down_write(&ni->file.run_lock); |
be71b5cb KK |
1448 | */ |
1449 | int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size, | |
1450 | u64 new_valid) | |
1451 | { | |
1452 | int err = 0; | |
1453 | struct runs_tree *run = &ni->file.run; | |
1454 | struct ntfs_sb_info *sbi = ni->mi.sbi; | |
1455 | struct ATTRIB *attr = NULL, *attr_b; | |
1456 | struct ATTR_LIST_ENTRY *le, *le_b; | |
1457 | struct mft_inode *mi, *mi_b; | |
1458 | CLST svcn, evcn1, next_svcn, lcn, len; | |
1459 | CLST vcn, end, clst_data; | |
1460 | u64 total_size, valid_size, data_size; | |
1461 | ||
1462 | le_b = NULL; | |
1463 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); | |
1464 | if (!attr_b) | |
1465 | return -ENOENT; | |
1466 | ||
1467 | if (!is_attr_ext(attr_b)) | |
1468 | return -EINVAL; | |
1469 | ||
1470 | vcn = frame << NTFS_LZNT_CUNIT; | |
1471 | total_size = le64_to_cpu(attr_b->nres.total_size); | |
1472 | ||
1473 | svcn = le64_to_cpu(attr_b->nres.svcn); | |
1474 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; | |
1475 | data_size = le64_to_cpu(attr_b->nres.data_size); | |
1476 | ||
1477 | if (svcn <= vcn && vcn < evcn1) { | |
1478 | attr = attr_b; | |
1479 | le = le_b; | |
1480 | mi = mi_b; | |
1481 | } else if (!le_b) { | |
1482 | err = -EINVAL; | |
1483 | goto out; | |
1484 | } else { | |
1485 | le = le_b; | |
1486 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, | |
1487 | &mi); | |
1488 | if (!attr) { | |
1489 | err = -EINVAL; | |
1490 | goto out; | |
1491 | } | |
1492 | svcn = le64_to_cpu(attr->nres.svcn); | |
1493 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; | |
1494 | } | |
1495 | ||
1496 | err = attr_load_runs(attr, ni, run, NULL); | |
1497 | if (err) | |
1498 | goto out; | |
1499 | ||
1500 | err = attr_is_frame_compressed(ni, attr_b, frame, &clst_data); | |
1501 | if (err) | |
1502 | goto out; | |
1503 | ||
1504 | total_size -= (u64)clst_data << sbi->cluster_bits; | |
1505 | ||
1506 | len = bytes_to_cluster(sbi, compr_size); | |
1507 | ||
1508 | if (len == clst_data) | |
1509 | goto out; | |
1510 | ||
1511 | if (len < clst_data) { | |
1512 | err = run_deallocate_ex(sbi, run, vcn + len, clst_data - len, | |
1513 | NULL, true); | |
1514 | if (err) | |
1515 | goto out; | |
1516 | ||
1517 | if (!run_add_entry(run, vcn + len, SPARSE_LCN, clst_data - len, | |
1518 | false)) { | |
1519 | err = -ENOMEM; | |
1520 | goto out; | |
1521 | } | |
1522 | end = vcn + clst_data; | |
e8b8e97f | 1523 | /* Run contains updated range [vcn + len : end). */ |
be71b5cb KK |
1524 | } else { |
1525 | CLST alen, hint = 0; | |
e8b8e97f | 1526 | /* Get the last LCN to allocate from. */ |
be71b5cb KK |
1527 | if (vcn + clst_data && |
1528 | !run_lookup_entry(run, vcn + clst_data - 1, &hint, NULL, | |
1529 | NULL)) { | |
1530 | hint = -1; | |
1531 | } | |
1532 | ||
1533 | err = attr_allocate_clusters(sbi, run, vcn + clst_data, | |
1534 | hint + 1, len - clst_data, NULL, 0, | |
1535 | &alen, 0, &lcn); | |
1536 | if (err) | |
1537 | goto out; | |
1538 | ||
1539 | end = vcn + len; | |
e8b8e97f | 1540 | /* Run contains updated range [vcn + clst_data : end). */ |
be71b5cb KK |
1541 | } |
1542 | ||
1543 | total_size += (u64)len << sbi->cluster_bits; | |
1544 | ||
1545 | repack: | |
1546 | err = mi_pack_runs(mi, attr, run, max(end, evcn1) - svcn); | |
1547 | if (err) | |
1548 | goto out; | |
1549 | ||
1550 | attr_b->nres.total_size = cpu_to_le64(total_size); | |
1551 | inode_set_bytes(&ni->vfs_inode, total_size); | |
1552 | ||
1553 | mi_b->dirty = true; | |
1554 | mark_inode_dirty(&ni->vfs_inode); | |
1555 | ||
e8b8e97f | 1556 | /* Stored [vcn : next_svcn) from [vcn : end). */ |
be71b5cb KK |
1557 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; |
1558 | ||
1559 | if (end <= evcn1) { | |
1560 | if (next_svcn == evcn1) { | |
e8b8e97f | 1561 | /* Normal way. Update attribute and exit. */ |
be71b5cb KK |
1562 | goto ok; |
1563 | } | |
e8b8e97f | 1564 | /* Add new segment [next_svcn : evcn1 - next_svcn). */ |
be71b5cb KK |
1565 | if (!ni->attr_list.size) { |
1566 | err = ni_create_attr_list(ni); | |
1567 | if (err) | |
1568 | goto out; | |
e8b8e97f | 1569 | /* Layout of records is changed. */ |
be71b5cb KK |
1570 | le_b = NULL; |
1571 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, | |
1572 | 0, NULL, &mi_b); | |
1573 | if (!attr_b) { | |
1574 | err = -ENOENT; | |
1575 | goto out; | |
1576 | } | |
1577 | ||
1578 | attr = attr_b; | |
1579 | le = le_b; | |
1580 | mi = mi_b; | |
1581 | goto repack; | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | svcn = evcn1; | |
1586 | ||
e8b8e97f | 1587 | /* Estimate next attribute. */ |
be71b5cb KK |
1588 | attr = ni_find_attr(ni, attr, &le, ATTR_DATA, NULL, 0, &svcn, &mi); |
1589 | ||
1590 | if (attr) { | |
1591 | CLST alloc = bytes_to_cluster( | |
1592 | sbi, le64_to_cpu(attr_b->nres.alloc_size)); | |
1593 | CLST evcn = le64_to_cpu(attr->nres.evcn); | |
1594 | ||
1595 | if (end < next_svcn) | |
1596 | end = next_svcn; | |
1597 | while (end > evcn) { | |
e8b8e97f | 1598 | /* Remove segment [svcn : evcn). */ |
78ab59fe | 1599 | mi_remove_attr(NULL, mi, attr); |
be71b5cb KK |
1600 | |
1601 | if (!al_remove_le(ni, le)) { | |
1602 | err = -EINVAL; | |
1603 | goto out; | |
1604 | } | |
1605 | ||
1606 | if (evcn + 1 >= alloc) { | |
e8b8e97f | 1607 | /* Last attribute segment. */ |
be71b5cb KK |
1608 | evcn1 = evcn + 1; |
1609 | goto ins_ext; | |
1610 | } | |
1611 | ||
1612 | if (ni_load_mi(ni, le, &mi)) { | |
1613 | attr = NULL; | |
1614 | goto out; | |
1615 | } | |
1616 | ||
1617 | attr = mi_find_attr(mi, NULL, ATTR_DATA, NULL, 0, | |
1618 | &le->id); | |
1619 | if (!attr) { | |
1620 | err = -EINVAL; | |
1621 | goto out; | |
1622 | } | |
1623 | svcn = le64_to_cpu(attr->nres.svcn); | |
1624 | evcn = le64_to_cpu(attr->nres.evcn); | |
1625 | } | |
1626 | ||
1627 | if (end < svcn) | |
1628 | end = svcn; | |
1629 | ||
1630 | err = attr_load_runs(attr, ni, run, &end); | |
1631 | if (err) | |
1632 | goto out; | |
1633 | ||
1634 | evcn1 = evcn + 1; | |
1635 | attr->nres.svcn = cpu_to_le64(next_svcn); | |
1636 | err = mi_pack_runs(mi, attr, run, evcn1 - next_svcn); | |
1637 | if (err) | |
1638 | goto out; | |
1639 | ||
1640 | le->vcn = cpu_to_le64(next_svcn); | |
1641 | ni->attr_list.dirty = true; | |
1642 | mi->dirty = true; | |
1643 | ||
1644 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; | |
1645 | } | |
1646 | ins_ext: | |
1647 | if (evcn1 > next_svcn) { | |
1648 | err = ni_insert_nonresident(ni, ATTR_DATA, NULL, 0, run, | |
1649 | next_svcn, evcn1 - next_svcn, | |
1650 | attr_b->flags, &attr, &mi); | |
1651 | if (err) | |
1652 | goto out; | |
1653 | } | |
1654 | ok: | |
1655 | run_truncate_around(run, vcn); | |
1656 | out: | |
1657 | if (new_valid > data_size) | |
1658 | new_valid = data_size; | |
1659 | ||
1660 | valid_size = le64_to_cpu(attr_b->nres.valid_size); | |
1661 | if (new_valid != valid_size) { | |
1662 | attr_b->nres.valid_size = cpu_to_le64(valid_size); | |
1663 | mi_b->dirty = true; | |
1664 | } | |
1665 | ||
1666 | return err; | |
1667 | } | |
1668 | ||
e8b8e97f KA |
1669 | /* |
1670 | * attr_collapse_range - Collapse range in file. | |
1671 | */ | |
be71b5cb KK |
1672 | int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes) |
1673 | { | |
1674 | int err = 0; | |
1675 | struct runs_tree *run = &ni->file.run; | |
1676 | struct ntfs_sb_info *sbi = ni->mi.sbi; | |
1677 | struct ATTRIB *attr = NULL, *attr_b; | |
1678 | struct ATTR_LIST_ENTRY *le, *le_b; | |
1679 | struct mft_inode *mi, *mi_b; | |
1680 | CLST svcn, evcn1, len, dealloc, alen; | |
1681 | CLST vcn, end; | |
1682 | u64 valid_size, data_size, alloc_size, total_size; | |
1683 | u32 mask; | |
1684 | __le16 a_flags; | |
1685 | ||
1686 | if (!bytes) | |
1687 | return 0; | |
1688 | ||
1689 | le_b = NULL; | |
1690 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); | |
1691 | if (!attr_b) | |
1692 | return -ENOENT; | |
1693 | ||
1694 | if (!attr_b->non_res) { | |
1695 | /* Attribute is resident. Nothing to do? */ | |
1696 | return 0; | |
1697 | } | |
1698 | ||
1699 | data_size = le64_to_cpu(attr_b->nres.data_size); | |
1700 | alloc_size = le64_to_cpu(attr_b->nres.alloc_size); | |
1701 | a_flags = attr_b->flags; | |
1702 | ||
1703 | if (is_attr_ext(attr_b)) { | |
1704 | total_size = le64_to_cpu(attr_b->nres.total_size); | |
1705 | mask = (sbi->cluster_size << attr_b->nres.c_unit) - 1; | |
1706 | } else { | |
1707 | total_size = alloc_size; | |
1708 | mask = sbi->cluster_mask; | |
1709 | } | |
1710 | ||
1711 | if ((vbo & mask) || (bytes & mask)) { | |
e8b8e97f | 1712 | /* Allow to collapse only cluster aligned ranges. */ |
be71b5cb KK |
1713 | return -EINVAL; |
1714 | } | |
1715 | ||
1716 | if (vbo > data_size) | |
1717 | return -EINVAL; | |
1718 | ||
1719 | down_write(&ni->file.run_lock); | |
1720 | ||
1721 | if (vbo + bytes >= data_size) { | |
1722 | u64 new_valid = min(ni->i_valid, vbo); | |
1723 | ||
e8b8e97f | 1724 | /* Simple truncate file at 'vbo'. */ |
be71b5cb KK |
1725 | truncate_setsize(&ni->vfs_inode, vbo); |
1726 | err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, vbo, | |
1727 | &new_valid, true, NULL); | |
1728 | ||
1729 | if (!err && new_valid < ni->i_valid) | |
1730 | ni->i_valid = new_valid; | |
1731 | ||
1732 | goto out; | |
1733 | } | |
1734 | ||
1735 | /* | |
e8b8e97f | 1736 | * Enumerate all attribute segments and collapse. |
be71b5cb KK |
1737 | */ |
1738 | alen = alloc_size >> sbi->cluster_bits; | |
1739 | vcn = vbo >> sbi->cluster_bits; | |
1740 | len = bytes >> sbi->cluster_bits; | |
1741 | end = vcn + len; | |
1742 | dealloc = 0; | |
1743 | ||
1744 | svcn = le64_to_cpu(attr_b->nres.svcn); | |
1745 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; | |
1746 | ||
1747 | if (svcn <= vcn && vcn < evcn1) { | |
1748 | attr = attr_b; | |
1749 | le = le_b; | |
1750 | mi = mi_b; | |
1751 | } else if (!le_b) { | |
1752 | err = -EINVAL; | |
1753 | goto out; | |
1754 | } else { | |
1755 | le = le_b; | |
1756 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, | |
1757 | &mi); | |
1758 | if (!attr) { | |
1759 | err = -EINVAL; | |
1760 | goto out; | |
1761 | } | |
1762 | ||
1763 | svcn = le64_to_cpu(attr->nres.svcn); | |
1764 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; | |
1765 | } | |
1766 | ||
1767 | for (;;) { | |
1768 | if (svcn >= end) { | |
e8b8e97f | 1769 | /* Shift VCN- */ |
be71b5cb KK |
1770 | attr->nres.svcn = cpu_to_le64(svcn - len); |
1771 | attr->nres.evcn = cpu_to_le64(evcn1 - 1 - len); | |
1772 | if (le) { | |
1773 | le->vcn = attr->nres.svcn; | |
1774 | ni->attr_list.dirty = true; | |
1775 | } | |
1776 | mi->dirty = true; | |
1777 | } else if (svcn < vcn || end < evcn1) { | |
1778 | CLST vcn1, eat, next_svcn; | |
1779 | ||
e8b8e97f | 1780 | /* Collapse a part of this attribute segment. */ |
be71b5cb KK |
1781 | err = attr_load_runs(attr, ni, run, &svcn); |
1782 | if (err) | |
1783 | goto out; | |
1784 | vcn1 = max(vcn, svcn); | |
1785 | eat = min(end, evcn1) - vcn1; | |
1786 | ||
1787 | err = run_deallocate_ex(sbi, run, vcn1, eat, &dealloc, | |
1788 | true); | |
1789 | if (err) | |
1790 | goto out; | |
1791 | ||
1792 | if (!run_collapse_range(run, vcn1, eat)) { | |
1793 | err = -ENOMEM; | |
1794 | goto out; | |
1795 | } | |
1796 | ||
1797 | if (svcn >= vcn) { | |
e8b8e97f | 1798 | /* Shift VCN */ |
be71b5cb KK |
1799 | attr->nres.svcn = cpu_to_le64(vcn); |
1800 | if (le) { | |
1801 | le->vcn = attr->nres.svcn; | |
1802 | ni->attr_list.dirty = true; | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | err = mi_pack_runs(mi, attr, run, evcn1 - svcn - eat); | |
1807 | if (err) | |
1808 | goto out; | |
1809 | ||
1810 | next_svcn = le64_to_cpu(attr->nres.evcn) + 1; | |
1811 | if (next_svcn + eat < evcn1) { | |
1812 | err = ni_insert_nonresident( | |
1813 | ni, ATTR_DATA, NULL, 0, run, next_svcn, | |
1814 | evcn1 - eat - next_svcn, a_flags, &attr, | |
1815 | &mi); | |
1816 | if (err) | |
1817 | goto out; | |
1818 | ||
e8b8e97f | 1819 | /* Layout of records maybe changed. */ |
be71b5cb KK |
1820 | attr_b = NULL; |
1821 | le = al_find_ex(ni, NULL, ATTR_DATA, NULL, 0, | |
1822 | &next_svcn); | |
1823 | if (!le) { | |
1824 | err = -EINVAL; | |
1825 | goto out; | |
1826 | } | |
1827 | } | |
1828 | ||
e8b8e97f | 1829 | /* Free all allocated memory. */ |
be71b5cb KK |
1830 | run_truncate(run, 0); |
1831 | } else { | |
1832 | u16 le_sz; | |
1833 | u16 roff = le16_to_cpu(attr->nres.run_off); | |
1834 | ||
be71b5cb KK |
1835 | run_unpack_ex(RUN_DEALLOCATE, sbi, ni->mi.rno, svcn, |
1836 | evcn1 - 1, svcn, Add2Ptr(attr, roff), | |
1837 | le32_to_cpu(attr->size) - roff); | |
1838 | ||
e8b8e97f | 1839 | /* Delete this attribute segment. */ |
78ab59fe | 1840 | mi_remove_attr(NULL, mi, attr); |
be71b5cb KK |
1841 | if (!le) |
1842 | break; | |
1843 | ||
1844 | le_sz = le16_to_cpu(le->size); | |
1845 | if (!al_remove_le(ni, le)) { | |
1846 | err = -EINVAL; | |
1847 | goto out; | |
1848 | } | |
1849 | ||
1850 | if (evcn1 >= alen) | |
1851 | break; | |
1852 | ||
1853 | if (!svcn) { | |
e8b8e97f | 1854 | /* Load next record that contains this attribute. */ |
be71b5cb KK |
1855 | if (ni_load_mi(ni, le, &mi)) { |
1856 | err = -EINVAL; | |
1857 | goto out; | |
1858 | } | |
1859 | ||
e8b8e97f | 1860 | /* Look for required attribute. */ |
be71b5cb KK |
1861 | attr = mi_find_attr(mi, NULL, ATTR_DATA, NULL, |
1862 | 0, &le->id); | |
1863 | if (!attr) { | |
1864 | err = -EINVAL; | |
1865 | goto out; | |
1866 | } | |
1867 | goto next_attr; | |
1868 | } | |
1869 | le = (struct ATTR_LIST_ENTRY *)((u8 *)le - le_sz); | |
1870 | } | |
1871 | ||
1872 | if (evcn1 >= alen) | |
1873 | break; | |
1874 | ||
1875 | attr = ni_enum_attr_ex(ni, attr, &le, &mi); | |
1876 | if (!attr) { | |
1877 | err = -EINVAL; | |
1878 | goto out; | |
1879 | } | |
1880 | ||
1881 | next_attr: | |
1882 | svcn = le64_to_cpu(attr->nres.svcn); | |
1883 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; | |
1884 | } | |
1885 | ||
1886 | if (!attr_b) { | |
1887 | le_b = NULL; | |
1888 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, | |
1889 | &mi_b); | |
1890 | if (!attr_b) { | |
1891 | err = -ENOENT; | |
1892 | goto out; | |
1893 | } | |
1894 | } | |
1895 | ||
1896 | data_size -= bytes; | |
1897 | valid_size = ni->i_valid; | |
1898 | if (vbo + bytes <= valid_size) | |
1899 | valid_size -= bytes; | |
1900 | else if (vbo < valid_size) | |
1901 | valid_size = vbo; | |
1902 | ||
1903 | attr_b->nres.alloc_size = cpu_to_le64(alloc_size - bytes); | |
1904 | attr_b->nres.data_size = cpu_to_le64(data_size); | |
1905 | attr_b->nres.valid_size = cpu_to_le64(min(valid_size, data_size)); | |
1906 | total_size -= (u64)dealloc << sbi->cluster_bits; | |
1907 | if (is_attr_ext(attr_b)) | |
1908 | attr_b->nres.total_size = cpu_to_le64(total_size); | |
1909 | mi_b->dirty = true; | |
1910 | ||
e8b8e97f | 1911 | /* Update inode size. */ |
be71b5cb KK |
1912 | ni->i_valid = valid_size; |
1913 | ni->vfs_inode.i_size = data_size; | |
1914 | inode_set_bytes(&ni->vfs_inode, total_size); | |
1915 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; | |
1916 | mark_inode_dirty(&ni->vfs_inode); | |
1917 | ||
1918 | out: | |
1919 | up_write(&ni->file.run_lock); | |
1920 | if (err) | |
1921 | make_bad_inode(&ni->vfs_inode); | |
1922 | ||
1923 | return err; | |
1924 | } | |
1925 | ||
e8b8e97f KA |
1926 | /* |
1927 | * attr_punch_hole | |
1928 | * | |
1929 | * Not for normal files. | |
1930 | */ | |
be71b5cb KK |
1931 | int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size) |
1932 | { | |
1933 | int err = 0; | |
1934 | struct runs_tree *run = &ni->file.run; | |
1935 | struct ntfs_sb_info *sbi = ni->mi.sbi; | |
1936 | struct ATTRIB *attr = NULL, *attr_b; | |
1937 | struct ATTR_LIST_ENTRY *le, *le_b; | |
1938 | struct mft_inode *mi, *mi_b; | |
1939 | CLST svcn, evcn1, vcn, len, end, alen, dealloc; | |
1940 | u64 total_size, alloc_size; | |
1941 | u32 mask; | |
1942 | ||
1943 | if (!bytes) | |
1944 | return 0; | |
1945 | ||
1946 | le_b = NULL; | |
1947 | attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b); | |
1948 | if (!attr_b) | |
1949 | return -ENOENT; | |
1950 | ||
1951 | if (!attr_b->non_res) { | |
1952 | u32 data_size = le32_to_cpu(attr->res.data_size); | |
1953 | u32 from, to; | |
1954 | ||
1955 | if (vbo > data_size) | |
1956 | return 0; | |
1957 | ||
1958 | from = vbo; | |
6e3331ee | 1959 | to = min_t(u64, vbo + bytes, data_size); |
be71b5cb KK |
1960 | memset(Add2Ptr(resident_data(attr_b), from), 0, to - from); |
1961 | return 0; | |
1962 | } | |
1963 | ||
1964 | if (!is_attr_ext(attr_b)) | |
1965 | return -EOPNOTSUPP; | |
1966 | ||
1967 | alloc_size = le64_to_cpu(attr_b->nres.alloc_size); | |
1968 | total_size = le64_to_cpu(attr_b->nres.total_size); | |
1969 | ||
1970 | if (vbo >= alloc_size) { | |
d3624466 | 1971 | /* NOTE: It is allowed. */ |
be71b5cb KK |
1972 | return 0; |
1973 | } | |
1974 | ||
1975 | mask = (sbi->cluster_size << attr_b->nres.c_unit) - 1; | |
1976 | ||
1977 | bytes += vbo; | |
1978 | if (bytes > alloc_size) | |
1979 | bytes = alloc_size; | |
1980 | bytes -= vbo; | |
1981 | ||
1982 | if ((vbo & mask) || (bytes & mask)) { | |
d3624466 | 1983 | /* We have to zero a range(s). */ |
be71b5cb | 1984 | if (frame_size == NULL) { |
d3624466 | 1985 | /* Caller insists range is aligned. */ |
be71b5cb KK |
1986 | return -EINVAL; |
1987 | } | |
1988 | *frame_size = mask + 1; | |
1989 | return E_NTFS_NOTALIGNED; | |
1990 | } | |
1991 | ||
1992 | down_write(&ni->file.run_lock); | |
1993 | /* | |
e8b8e97f | 1994 | * Enumerate all attribute segments and punch hole where necessary. |
be71b5cb KK |
1995 | */ |
1996 | alen = alloc_size >> sbi->cluster_bits; | |
1997 | vcn = vbo >> sbi->cluster_bits; | |
1998 | len = bytes >> sbi->cluster_bits; | |
1999 | end = vcn + len; | |
2000 | dealloc = 0; | |
2001 | ||
2002 | svcn = le64_to_cpu(attr_b->nres.svcn); | |
2003 | evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1; | |
2004 | ||
2005 | if (svcn <= vcn && vcn < evcn1) { | |
2006 | attr = attr_b; | |
2007 | le = le_b; | |
2008 | mi = mi_b; | |
2009 | } else if (!le_b) { | |
2010 | err = -EINVAL; | |
2011 | goto out; | |
2012 | } else { | |
2013 | le = le_b; | |
2014 | attr = ni_find_attr(ni, attr_b, &le, ATTR_DATA, NULL, 0, &vcn, | |
2015 | &mi); | |
2016 | if (!attr) { | |
2017 | err = -EINVAL; | |
2018 | goto out; | |
2019 | } | |
2020 | ||
2021 | svcn = le64_to_cpu(attr->nres.svcn); | |
2022 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; | |
2023 | } | |
2024 | ||
2025 | while (svcn < end) { | |
2026 | CLST vcn1, zero, dealloc2; | |
2027 | ||
2028 | err = attr_load_runs(attr, ni, run, &svcn); | |
2029 | if (err) | |
2030 | goto out; | |
2031 | vcn1 = max(vcn, svcn); | |
2032 | zero = min(end, evcn1) - vcn1; | |
2033 | ||
2034 | dealloc2 = dealloc; | |
2035 | err = run_deallocate_ex(sbi, run, vcn1, zero, &dealloc, true); | |
2036 | if (err) | |
2037 | goto out; | |
2038 | ||
2039 | if (dealloc2 == dealloc) { | |
e8b8e97f | 2040 | /* Looks like the required range is already sparsed. */ |
be71b5cb KK |
2041 | } else { |
2042 | if (!run_add_entry(run, vcn1, SPARSE_LCN, zero, | |
2043 | false)) { | |
2044 | err = -ENOMEM; | |
2045 | goto out; | |
2046 | } | |
2047 | ||
2048 | err = mi_pack_runs(mi, attr, run, evcn1 - svcn); | |
2049 | if (err) | |
2050 | goto out; | |
2051 | } | |
e8b8e97f | 2052 | /* Free all allocated memory. */ |
be71b5cb KK |
2053 | run_truncate(run, 0); |
2054 | ||
2055 | if (evcn1 >= alen) | |
2056 | break; | |
2057 | ||
2058 | attr = ni_enum_attr_ex(ni, attr, &le, &mi); | |
2059 | if (!attr) { | |
2060 | err = -EINVAL; | |
2061 | goto out; | |
2062 | } | |
2063 | ||
2064 | svcn = le64_to_cpu(attr->nres.svcn); | |
2065 | evcn1 = le64_to_cpu(attr->nres.evcn) + 1; | |
2066 | } | |
2067 | ||
2068 | total_size -= (u64)dealloc << sbi->cluster_bits; | |
2069 | attr_b->nres.total_size = cpu_to_le64(total_size); | |
2070 | mi_b->dirty = true; | |
2071 | ||
e8b8e97f | 2072 | /* Update inode size. */ |
be71b5cb KK |
2073 | inode_set_bytes(&ni->vfs_inode, total_size); |
2074 | ni->ni_flags |= NI_FLAG_UPDATE_PARENT; | |
2075 | mark_inode_dirty(&ni->vfs_inode); | |
2076 | ||
2077 | out: | |
2078 | up_write(&ni->file.run_lock); | |
2079 | if (err) | |
2080 | make_bad_inode(&ni->vfs_inode); | |
2081 | ||
2082 | return err; | |
2083 | } |