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Commit | Line | Data |
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9eefe2a2 SR |
1 | /* |
2 | * This file is part of UBIFS. | |
3 | * | |
4 | * Copyright (C) 2006-2008 Nokia Corporation. | |
5 | * | |
b1a14f8a | 6 | * (C) Copyright 2008-2010 |
9eefe2a2 SR |
7 | * Stefan Roese, DENX Software Engineering, sr@denx.de. |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License version 2 as published by | |
11 | * the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
16 | * more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along with | |
19 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
20 | * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | * | |
22 | * Authors: Artem Bityutskiy (Битюцкий Артём) | |
23 | * Adrian Hunter | |
24 | */ | |
25 | ||
6e295186 SG |
26 | #include <common.h> |
27 | #include <memalign.h> | |
9eefe2a2 | 28 | #include "ubifs.h" |
c1a0fd5f | 29 | #include <u-boot/zlib.h> |
9eefe2a2 | 30 | |
ff94bc40 HS |
31 | #include <linux/err.h> |
32 | #include <linux/lzo.h> | |
33 | ||
9eefe2a2 SR |
34 | DECLARE_GLOBAL_DATA_PTR; |
35 | ||
36 | /* compress.c */ | |
37 | ||
38 | /* | |
c1a0fd5f | 39 | * We need a wrapper for zunzip() because the parameters are |
9eefe2a2 SR |
40 | * incompatible with the lzo decompressor. |
41 | */ | |
42 | static int gzip_decompress(const unsigned char *in, size_t in_len, | |
43 | unsigned char *out, size_t *out_len) | |
44 | { | |
8044c138 VPP |
45 | return zunzip(out, *out_len, (unsigned char *)in, |
46 | (unsigned long *)out_len, 0, 0); | |
9eefe2a2 SR |
47 | } |
48 | ||
49 | /* Fake description object for the "none" compressor */ | |
50 | static struct ubifs_compressor none_compr = { | |
51 | .compr_type = UBIFS_COMPR_NONE, | |
ff94bc40 | 52 | .name = "none", |
9eefe2a2 SR |
53 | .capi_name = "", |
54 | .decompress = NULL, | |
55 | }; | |
56 | ||
57 | static struct ubifs_compressor lzo_compr = { | |
58 | .compr_type = UBIFS_COMPR_LZO, | |
ff94bc40 HS |
59 | #ifndef __UBOOT__ |
60 | .comp_mutex = &lzo_mutex, | |
61 | #endif | |
62 | .name = "lzo", | |
9eefe2a2 SR |
63 | .capi_name = "lzo", |
64 | .decompress = lzo1x_decompress_safe, | |
65 | }; | |
66 | ||
67 | static struct ubifs_compressor zlib_compr = { | |
68 | .compr_type = UBIFS_COMPR_ZLIB, | |
ff94bc40 HS |
69 | #ifndef __UBOOT__ |
70 | .comp_mutex = &deflate_mutex, | |
71 | .decomp_mutex = &inflate_mutex, | |
72 | #endif | |
9eefe2a2 SR |
73 | .name = "zlib", |
74 | .capi_name = "deflate", | |
75 | .decompress = gzip_decompress, | |
76 | }; | |
77 | ||
78 | /* All UBIFS compressors */ | |
79 | struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT]; | |
80 | ||
ff94bc40 HS |
81 | |
82 | #ifdef __UBOOT__ | |
83 | /* from mm/util.c */ | |
84 | ||
85 | /** | |
86 | * kmemdup - duplicate region of memory | |
87 | * | |
88 | * @src: memory region to duplicate | |
89 | * @len: memory region length | |
90 | * @gfp: GFP mask to use | |
91 | */ | |
92 | void *kmemdup(const void *src, size_t len, gfp_t gfp) | |
93 | { | |
94 | void *p; | |
95 | ||
96 | p = kmalloc(len, gfp); | |
97 | if (p) | |
98 | memcpy(p, src, len); | |
99 | return p; | |
100 | } | |
101 | ||
102 | struct crypto_comp { | |
103 | int compressor; | |
104 | }; | |
105 | ||
0195a7bb HS |
106 | static inline struct crypto_comp |
107 | *crypto_alloc_comp(const char *alg_name, u32 type, u32 mask) | |
ff94bc40 HS |
108 | { |
109 | struct ubifs_compressor *comp; | |
110 | struct crypto_comp *ptr; | |
111 | int i = 0; | |
112 | ||
4519668b | 113 | ptr = malloc_cache_aligned(sizeof(struct crypto_comp)); |
ff94bc40 HS |
114 | while (i < UBIFS_COMPR_TYPES_CNT) { |
115 | comp = ubifs_compressors[i]; | |
116 | if (!comp) { | |
117 | i++; | |
118 | continue; | |
119 | } | |
120 | if (strncmp(alg_name, comp->capi_name, strlen(alg_name)) == 0) { | |
121 | ptr->compressor = i; | |
122 | return ptr; | |
123 | } | |
124 | i++; | |
125 | } | |
126 | if (i >= UBIFS_COMPR_TYPES_CNT) { | |
0195a7bb | 127 | dbg_gen("invalid compression type %s", alg_name); |
ff94bc40 HS |
128 | free (ptr); |
129 | return NULL; | |
130 | } | |
131 | return ptr; | |
132 | } | |
0195a7bb HS |
133 | static inline int |
134 | crypto_comp_decompress(const struct ubifs_info *c, struct crypto_comp *tfm, | |
135 | const u8 *src, unsigned int slen, u8 *dst, | |
136 | unsigned int *dlen) | |
ff94bc40 HS |
137 | { |
138 | struct ubifs_compressor *compr = ubifs_compressors[tfm->compressor]; | |
139 | int err; | |
140 | ||
141 | if (compr->compr_type == UBIFS_COMPR_NONE) { | |
142 | memcpy(dst, src, slen); | |
143 | *dlen = slen; | |
144 | return 0; | |
145 | } | |
146 | ||
147 | err = compr->decompress(src, slen, dst, (size_t *)dlen); | |
148 | if (err) | |
0195a7bb | 149 | ubifs_err(c, "cannot decompress %d bytes, compressor %s, " |
ff94bc40 HS |
150 | "error %d", slen, compr->name, err); |
151 | ||
152 | return err; | |
153 | ||
154 | return 0; | |
155 | } | |
dc288431 AH |
156 | |
157 | /* from shrinker.c */ | |
158 | ||
159 | /* Global clean znode counter (for all mounted UBIFS instances) */ | |
160 | atomic_long_t ubifs_clean_zn_cnt; | |
161 | ||
ff94bc40 HS |
162 | #endif |
163 | ||
9eefe2a2 SR |
164 | /** |
165 | * ubifs_decompress - decompress data. | |
166 | * @in_buf: data to decompress | |
167 | * @in_len: length of the data to decompress | |
168 | * @out_buf: output buffer where decompressed data should | |
169 | * @out_len: output length is returned here | |
170 | * @compr_type: type of compression | |
171 | * | |
172 | * This function decompresses data from buffer @in_buf into buffer @out_buf. | |
173 | * The length of the uncompressed data is returned in @out_len. This functions | |
174 | * returns %0 on success or a negative error code on failure. | |
175 | */ | |
0195a7bb HS |
176 | int ubifs_decompress(const struct ubifs_info *c, const void *in_buf, |
177 | int in_len, void *out_buf, int *out_len, int compr_type) | |
9eefe2a2 SR |
178 | { |
179 | int err; | |
180 | struct ubifs_compressor *compr; | |
181 | ||
182 | if (unlikely(compr_type < 0 || compr_type >= UBIFS_COMPR_TYPES_CNT)) { | |
0195a7bb | 183 | ubifs_err(c, "invalid compression type %d", compr_type); |
9eefe2a2 SR |
184 | return -EINVAL; |
185 | } | |
186 | ||
187 | compr = ubifs_compressors[compr_type]; | |
188 | ||
189 | if (unlikely(!compr->capi_name)) { | |
0195a7bb | 190 | ubifs_err(c, "%s compression is not compiled in", compr->name); |
9eefe2a2 SR |
191 | return -EINVAL; |
192 | } | |
193 | ||
194 | if (compr_type == UBIFS_COMPR_NONE) { | |
195 | memcpy(out_buf, in_buf, in_len); | |
196 | *out_len = in_len; | |
197 | return 0; | |
198 | } | |
199 | ||
ff94bc40 HS |
200 | if (compr->decomp_mutex) |
201 | mutex_lock(compr->decomp_mutex); | |
0195a7bb | 202 | err = crypto_comp_decompress(c, compr->cc, in_buf, in_len, out_buf, |
ff94bc40 HS |
203 | (unsigned int *)out_len); |
204 | if (compr->decomp_mutex) | |
205 | mutex_unlock(compr->decomp_mutex); | |
9eefe2a2 | 206 | if (err) |
0195a7bb HS |
207 | ubifs_err(c, "cannot decompress %d bytes, compressor %s," |
208 | " error %d", in_len, compr->name, err); | |
9eefe2a2 SR |
209 | |
210 | return err; | |
211 | } | |
212 | ||
213 | /** | |
214 | * compr_init - initialize a compressor. | |
215 | * @compr: compressor description object | |
216 | * | |
217 | * This function initializes the requested compressor and returns zero in case | |
218 | * of success or a negative error code in case of failure. | |
219 | */ | |
220 | static int __init compr_init(struct ubifs_compressor *compr) | |
221 | { | |
222 | ubifs_compressors[compr->compr_type] = compr; | |
521af04d | 223 | |
2e5167cc | 224 | #ifdef CONFIG_NEEDS_MANUAL_RELOC |
9eefe2a2 SR |
225 | ubifs_compressors[compr->compr_type]->name += gd->reloc_off; |
226 | ubifs_compressors[compr->compr_type]->capi_name += gd->reloc_off; | |
227 | ubifs_compressors[compr->compr_type]->decompress += gd->reloc_off; | |
521af04d PT |
228 | #endif |
229 | ||
ff94bc40 HS |
230 | if (compr->capi_name) { |
231 | compr->cc = crypto_alloc_comp(compr->capi_name, 0, 0); | |
232 | if (IS_ERR(compr->cc)) { | |
0195a7bb HS |
233 | dbg_gen("cannot initialize compressor %s," |
234 | " error %ld", compr->name, | |
235 | PTR_ERR(compr->cc)); | |
ff94bc40 HS |
236 | return PTR_ERR(compr->cc); |
237 | } | |
238 | } | |
239 | ||
9eefe2a2 SR |
240 | return 0; |
241 | } | |
242 | ||
243 | /** | |
244 | * ubifs_compressors_init - initialize UBIFS compressors. | |
245 | * | |
246 | * This function initializes the compressor which were compiled in. Returns | |
247 | * zero in case of success and a negative error code in case of failure. | |
248 | */ | |
249 | int __init ubifs_compressors_init(void) | |
250 | { | |
251 | int err; | |
252 | ||
253 | err = compr_init(&lzo_compr); | |
254 | if (err) | |
255 | return err; | |
256 | ||
257 | err = compr_init(&zlib_compr); | |
258 | if (err) | |
259 | return err; | |
260 | ||
faac4fd8 ML |
261 | err = compr_init(&none_compr); |
262 | if (err) | |
263 | return err; | |
264 | ||
9eefe2a2 SR |
265 | return 0; |
266 | } | |
267 | ||
268 | /* | |
269 | * ubifsls... | |
270 | */ | |
271 | ||
272 | static int filldir(struct ubifs_info *c, const char *name, int namlen, | |
273 | u64 ino, unsigned int d_type) | |
274 | { | |
275 | struct inode *inode; | |
276 | char filetime[32]; | |
277 | ||
278 | switch (d_type) { | |
279 | case UBIFS_ITYPE_REG: | |
280 | printf("\t"); | |
281 | break; | |
282 | case UBIFS_ITYPE_DIR: | |
283 | printf("<DIR>\t"); | |
284 | break; | |
285 | case UBIFS_ITYPE_LNK: | |
286 | printf("<LNK>\t"); | |
287 | break; | |
288 | default: | |
289 | printf("other\t"); | |
290 | break; | |
291 | } | |
292 | ||
293 | inode = ubifs_iget(c->vfs_sb, ino); | |
294 | if (IS_ERR(inode)) { | |
295 | printf("%s: Error in ubifs_iget(), ino=%lld ret=%p!\n", | |
296 | __func__, ino, inode); | |
297 | return -1; | |
298 | } | |
299 | ctime_r((time_t *)&inode->i_mtime, filetime); | |
300 | printf("%9lld %24.24s ", inode->i_size, filetime); | |
ff94bc40 | 301 | #ifndef __UBOOT__ |
9eefe2a2 | 302 | ubifs_iput(inode); |
ff94bc40 | 303 | #endif |
9eefe2a2 SR |
304 | |
305 | printf("%s\n", name); | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
310 | static int ubifs_printdir(struct file *file, void *dirent) | |
311 | { | |
312 | int err, over = 0; | |
313 | struct qstr nm; | |
314 | union ubifs_key key; | |
315 | struct ubifs_dent_node *dent; | |
316 | struct inode *dir = file->f_path.dentry->d_inode; | |
317 | struct ubifs_info *c = dir->i_sb->s_fs_info; | |
318 | ||
319 | dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, file->f_pos); | |
320 | ||
321 | if (file->f_pos > UBIFS_S_KEY_HASH_MASK || file->f_pos == 2) | |
322 | /* | |
323 | * The directory was seek'ed to a senseless position or there | |
324 | * are no more entries. | |
325 | */ | |
326 | return 0; | |
327 | ||
328 | if (file->f_pos == 1) { | |
329 | /* Find the first entry in TNC and save it */ | |
330 | lowest_dent_key(c, &key, dir->i_ino); | |
331 | nm.name = NULL; | |
332 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
333 | if (IS_ERR(dent)) { | |
334 | err = PTR_ERR(dent); | |
335 | goto out; | |
336 | } | |
337 | ||
338 | file->f_pos = key_hash_flash(c, &dent->key); | |
339 | file->private_data = dent; | |
340 | } | |
341 | ||
342 | dent = file->private_data; | |
343 | if (!dent) { | |
344 | /* | |
345 | * The directory was seek'ed to and is now readdir'ed. | |
346 | * Find the entry corresponding to @file->f_pos or the | |
347 | * closest one. | |
348 | */ | |
349 | dent_key_init_hash(c, &key, dir->i_ino, file->f_pos); | |
350 | nm.name = NULL; | |
351 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
352 | if (IS_ERR(dent)) { | |
353 | err = PTR_ERR(dent); | |
354 | goto out; | |
355 | } | |
356 | file->f_pos = key_hash_flash(c, &dent->key); | |
357 | file->private_data = dent; | |
358 | } | |
359 | ||
360 | while (1) { | |
361 | dbg_gen("feed '%s', ino %llu, new f_pos %#x", | |
362 | dent->name, (unsigned long long)le64_to_cpu(dent->inum), | |
363 | key_hash_flash(c, &dent->key)); | |
364 | ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum); | |
365 | ||
366 | nm.len = le16_to_cpu(dent->nlen); | |
367 | over = filldir(c, (char *)dent->name, nm.len, | |
368 | le64_to_cpu(dent->inum), dent->type); | |
369 | if (over) | |
370 | return 0; | |
371 | ||
372 | /* Switch to the next entry */ | |
373 | key_read(c, &dent->key, &key); | |
374 | nm.name = (char *)dent->name; | |
375 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
376 | if (IS_ERR(dent)) { | |
377 | err = PTR_ERR(dent); | |
378 | goto out; | |
379 | } | |
380 | ||
381 | kfree(file->private_data); | |
382 | file->f_pos = key_hash_flash(c, &dent->key); | |
383 | file->private_data = dent; | |
384 | cond_resched(); | |
385 | } | |
386 | ||
387 | out: | |
388 | if (err != -ENOENT) { | |
0195a7bb | 389 | ubifs_err(c, "cannot find next direntry, error %d", err); |
9eefe2a2 SR |
390 | return err; |
391 | } | |
392 | ||
393 | kfree(file->private_data); | |
394 | file->private_data = NULL; | |
395 | file->f_pos = 2; | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static int ubifs_finddir(struct super_block *sb, char *dirname, | |
400 | unsigned long root_inum, unsigned long *inum) | |
401 | { | |
402 | int err; | |
403 | struct qstr nm; | |
404 | union ubifs_key key; | |
405 | struct ubifs_dent_node *dent; | |
406 | struct ubifs_info *c; | |
407 | struct file *file; | |
408 | struct dentry *dentry; | |
409 | struct inode *dir; | |
be73913b | 410 | int ret = 0; |
9eefe2a2 SR |
411 | |
412 | file = kzalloc(sizeof(struct file), 0); | |
413 | dentry = kzalloc(sizeof(struct dentry), 0); | |
414 | dir = kzalloc(sizeof(struct inode), 0); | |
415 | if (!file || !dentry || !dir) { | |
416 | printf("%s: Error, no memory for malloc!\n", __func__); | |
417 | err = -ENOMEM; | |
418 | goto out; | |
419 | } | |
420 | ||
421 | dir->i_sb = sb; | |
422 | file->f_path.dentry = dentry; | |
423 | file->f_path.dentry->d_parent = dentry; | |
424 | file->f_path.dentry->d_inode = dir; | |
425 | file->f_path.dentry->d_inode->i_ino = root_inum; | |
426 | c = sb->s_fs_info; | |
427 | ||
428 | dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, file->f_pos); | |
429 | ||
430 | /* Find the first entry in TNC and save it */ | |
431 | lowest_dent_key(c, &key, dir->i_ino); | |
432 | nm.name = NULL; | |
433 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
434 | if (IS_ERR(dent)) { | |
435 | err = PTR_ERR(dent); | |
436 | goto out; | |
437 | } | |
438 | ||
439 | file->f_pos = key_hash_flash(c, &dent->key); | |
440 | file->private_data = dent; | |
441 | ||
442 | while (1) { | |
443 | dbg_gen("feed '%s', ino %llu, new f_pos %#x", | |
444 | dent->name, (unsigned long long)le64_to_cpu(dent->inum), | |
445 | key_hash_flash(c, &dent->key)); | |
446 | ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum); | |
447 | ||
448 | nm.len = le16_to_cpu(dent->nlen); | |
449 | if ((strncmp(dirname, (char *)dent->name, nm.len) == 0) && | |
450 | (strlen(dirname) == nm.len)) { | |
451 | *inum = le64_to_cpu(dent->inum); | |
be73913b SR |
452 | ret = 1; |
453 | goto out_free; | |
9eefe2a2 SR |
454 | } |
455 | ||
456 | /* Switch to the next entry */ | |
457 | key_read(c, &dent->key, &key); | |
458 | nm.name = (char *)dent->name; | |
459 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
460 | if (IS_ERR(dent)) { | |
461 | err = PTR_ERR(dent); | |
462 | goto out; | |
463 | } | |
464 | ||
465 | kfree(file->private_data); | |
466 | file->f_pos = key_hash_flash(c, &dent->key); | |
467 | file->private_data = dent; | |
468 | cond_resched(); | |
469 | } | |
470 | ||
471 | out: | |
be73913b | 472 | if (err != -ENOENT) |
0195a7bb | 473 | dbg_gen("cannot find next direntry, error %d", err); |
9eefe2a2 | 474 | |
be73913b | 475 | out_free: |
3267bc1b WD |
476 | if (file->private_data) |
477 | kfree(file->private_data); | |
9eefe2a2 SR |
478 | if (file) |
479 | free(file); | |
480 | if (dentry) | |
481 | free(dentry); | |
482 | if (dir) | |
483 | free(dir); | |
484 | ||
be73913b | 485 | return ret; |
9eefe2a2 SR |
486 | } |
487 | ||
488 | static unsigned long ubifs_findfile(struct super_block *sb, char *filename) | |
489 | { | |
490 | int ret; | |
491 | char *next; | |
492 | char fpath[128]; | |
9d7952e4 | 493 | char symlinkpath[128]; |
9eefe2a2 SR |
494 | char *name = fpath; |
495 | unsigned long root_inum = 1; | |
496 | unsigned long inum; | |
9d7952e4 | 497 | int symlink_count = 0; /* Don't allow symlink recursion */ |
64b68178 | 498 | char link_name[64]; |
9eefe2a2 SR |
499 | |
500 | strcpy(fpath, filename); | |
501 | ||
502 | /* Remove all leading slashes */ | |
503 | while (*name == '/') | |
504 | name++; | |
505 | ||
506 | /* | |
507 | * Handle root-direcoty ('/') | |
508 | */ | |
509 | inum = root_inum; | |
510 | if (!name || *name == '\0') | |
511 | return inum; | |
512 | ||
513 | for (;;) { | |
9d7952e4 SK |
514 | struct inode *inode; |
515 | struct ubifs_inode *ui; | |
516 | ||
9eefe2a2 SR |
517 | /* Extract the actual part from the pathname. */ |
518 | next = strchr(name, '/'); | |
519 | if (next) { | |
520 | /* Remove all leading slashes. */ | |
521 | while (*next == '/') | |
522 | *(next++) = '\0'; | |
523 | } | |
524 | ||
525 | ret = ubifs_finddir(sb, name, root_inum, &inum); | |
9d7952e4 SK |
526 | if (!ret) |
527 | return 0; | |
528 | inode = ubifs_iget(sb, inum); | |
529 | ||
530 | if (!inode) | |
531 | return 0; | |
532 | ui = ubifs_inode(inode); | |
533 | ||
534 | if ((inode->i_mode & S_IFMT) == S_IFLNK) { | |
9d7952e4 SK |
535 | char buf[128]; |
536 | ||
537 | /* We have some sort of symlink recursion, bail out */ | |
538 | if (symlink_count++ > 8) { | |
539 | printf("Symlink recursion, aborting\n"); | |
540 | return 0; | |
541 | } | |
542 | memcpy(link_name, ui->data, ui->data_len); | |
543 | link_name[ui->data_len] = '\0'; | |
544 | ||
545 | if (link_name[0] == '/') { | |
546 | /* Absolute path, redo everything without | |
547 | * the leading slash */ | |
548 | next = name = link_name + 1; | |
549 | root_inum = 1; | |
550 | continue; | |
551 | } | |
552 | /* Relative to cur dir */ | |
ef37c683 | 553 | sprintf(buf, "%s/%s", |
9d7952e4 SK |
554 | link_name, next == NULL ? "" : next); |
555 | memcpy(symlinkpath, buf, sizeof(buf)); | |
556 | next = name = symlinkpath; | |
557 | continue; | |
558 | } | |
9eefe2a2 SR |
559 | |
560 | /* | |
561 | * Check if directory with this name exists | |
562 | */ | |
563 | ||
564 | /* Found the node! */ | |
9d7952e4 SK |
565 | if (!next || *next == '\0') |
566 | return inum; | |
9eefe2a2 SR |
567 | |
568 | root_inum = inum; | |
569 | name = next; | |
570 | } | |
571 | ||
572 | return 0; | |
573 | } | |
574 | ||
29cc5bca HG |
575 | int ubifs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info) |
576 | { | |
577 | if (rbdd) { | |
578 | debug("UBIFS cannot be used with normal block devices\n"); | |
579 | return -1; | |
580 | } | |
581 | ||
582 | /* | |
583 | * Should never happen since get_device_and_partition() already checks | |
584 | * this, but better safe then sorry. | |
585 | */ | |
586 | if (!ubifs_is_mounted()) { | |
587 | debug("UBIFS not mounted, use ubifsmount to mount volume first!\n"); | |
588 | return -1; | |
589 | } | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
ad15749b | 594 | int ubifs_ls(const char *filename) |
9eefe2a2 SR |
595 | { |
596 | struct ubifs_info *c = ubifs_sb->s_fs_info; | |
597 | struct file *file; | |
598 | struct dentry *dentry; | |
599 | struct inode *dir; | |
600 | void *dirent = NULL; | |
601 | unsigned long inum; | |
602 | int ret = 0; | |
603 | ||
604 | c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY); | |
ad15749b | 605 | inum = ubifs_findfile(ubifs_sb, (char *)filename); |
9eefe2a2 SR |
606 | if (!inum) { |
607 | ret = -1; | |
608 | goto out; | |
609 | } | |
610 | ||
611 | file = kzalloc(sizeof(struct file), 0); | |
612 | dentry = kzalloc(sizeof(struct dentry), 0); | |
613 | dir = kzalloc(sizeof(struct inode), 0); | |
614 | if (!file || !dentry || !dir) { | |
615 | printf("%s: Error, no memory for malloc!\n", __func__); | |
616 | ret = -ENOMEM; | |
617 | goto out_mem; | |
618 | } | |
619 | ||
620 | dir->i_sb = ubifs_sb; | |
621 | file->f_path.dentry = dentry; | |
622 | file->f_path.dentry->d_parent = dentry; | |
623 | file->f_path.dentry->d_inode = dir; | |
624 | file->f_path.dentry->d_inode->i_ino = inum; | |
625 | file->f_pos = 1; | |
626 | file->private_data = NULL; | |
627 | ubifs_printdir(file, dirent); | |
628 | ||
629 | out_mem: | |
630 | if (file) | |
631 | free(file); | |
632 | if (dentry) | |
633 | free(dentry); | |
634 | if (dir) | |
635 | free(dir); | |
636 | ||
637 | out: | |
638 | ubi_close_volume(c->ubi); | |
639 | return ret; | |
640 | } | |
641 | ||
29cc5bca HG |
642 | int ubifs_exists(const char *filename) |
643 | { | |
644 | struct ubifs_info *c = ubifs_sb->s_fs_info; | |
645 | unsigned long inum; | |
646 | ||
647 | c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY); | |
648 | inum = ubifs_findfile(ubifs_sb, (char *)filename); | |
649 | ubi_close_volume(c->ubi); | |
650 | ||
651 | return inum != 0; | |
652 | } | |
653 | ||
654 | int ubifs_size(const char *filename, loff_t *size) | |
655 | { | |
656 | struct ubifs_info *c = ubifs_sb->s_fs_info; | |
657 | unsigned long inum; | |
658 | struct inode *inode; | |
659 | int err = 0; | |
660 | ||
661 | c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY); | |
662 | ||
663 | inum = ubifs_findfile(ubifs_sb, (char *)filename); | |
664 | if (!inum) { | |
665 | err = -1; | |
666 | goto out; | |
667 | } | |
668 | ||
669 | inode = ubifs_iget(ubifs_sb, inum); | |
670 | if (IS_ERR(inode)) { | |
671 | printf("%s: Error reading inode %ld!\n", __func__, inum); | |
672 | err = PTR_ERR(inode); | |
673 | goto out; | |
674 | } | |
675 | ||
676 | *size = inode->i_size; | |
677 | ||
678 | ubifs_iput(inode); | |
679 | out: | |
680 | ubi_close_volume(c->ubi); | |
681 | return err; | |
682 | } | |
683 | ||
9eefe2a2 SR |
684 | /* |
685 | * ubifsload... | |
686 | */ | |
687 | ||
688 | /* file.c */ | |
689 | ||
690 | static inline void *kmap(struct page *page) | |
691 | { | |
692 | return page->addr; | |
693 | } | |
694 | ||
695 | static int read_block(struct inode *inode, void *addr, unsigned int block, | |
696 | struct ubifs_data_node *dn) | |
697 | { | |
698 | struct ubifs_info *c = inode->i_sb->s_fs_info; | |
699 | int err, len, out_len; | |
700 | union ubifs_key key; | |
701 | unsigned int dlen; | |
702 | ||
703 | data_key_init(c, &key, inode->i_ino, block); | |
704 | err = ubifs_tnc_lookup(c, &key, dn); | |
705 | if (err) { | |
706 | if (err == -ENOENT) | |
707 | /* Not found, so it must be a hole */ | |
708 | memset(addr, 0, UBIFS_BLOCK_SIZE); | |
709 | return err; | |
710 | } | |
711 | ||
712 | ubifs_assert(le64_to_cpu(dn->ch.sqnum) > ubifs_inode(inode)->creat_sqnum); | |
713 | ||
714 | len = le32_to_cpu(dn->size); | |
715 | if (len <= 0 || len > UBIFS_BLOCK_SIZE) | |
716 | goto dump; | |
717 | ||
718 | dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ; | |
719 | out_len = UBIFS_BLOCK_SIZE; | |
0195a7bb | 720 | err = ubifs_decompress(c, &dn->data, dlen, addr, &out_len, |
9eefe2a2 SR |
721 | le16_to_cpu(dn->compr_type)); |
722 | if (err || len != out_len) | |
723 | goto dump; | |
724 | ||
725 | /* | |
726 | * Data length can be less than a full block, even for blocks that are | |
727 | * not the last in the file (e.g., as a result of making a hole and | |
728 | * appending data). Ensure that the remainder is zeroed out. | |
729 | */ | |
730 | if (len < UBIFS_BLOCK_SIZE) | |
731 | memset(addr + len, 0, UBIFS_BLOCK_SIZE - len); | |
732 | ||
733 | return 0; | |
734 | ||
735 | dump: | |
0195a7bb | 736 | ubifs_err(c, "bad data node (block %u, inode %lu)", |
9eefe2a2 | 737 | block, inode->i_ino); |
ff94bc40 | 738 | ubifs_dump_node(c, dn); |
9eefe2a2 SR |
739 | return -EINVAL; |
740 | } | |
741 | ||
b1a14f8a SR |
742 | static int do_readpage(struct ubifs_info *c, struct inode *inode, |
743 | struct page *page, int last_block_size) | |
9eefe2a2 SR |
744 | { |
745 | void *addr; | |
746 | int err = 0, i; | |
747 | unsigned int block, beyond; | |
748 | struct ubifs_data_node *dn; | |
749 | loff_t i_size = inode->i_size; | |
750 | ||
751 | dbg_gen("ino %lu, pg %lu, i_size %lld", | |
752 | inode->i_ino, page->index, i_size); | |
753 | ||
754 | addr = kmap(page); | |
755 | ||
756 | block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT; | |
757 | beyond = (i_size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT; | |
758 | if (block >= beyond) { | |
759 | /* Reading beyond inode */ | |
760 | memset(addr, 0, PAGE_CACHE_SIZE); | |
761 | goto out; | |
762 | } | |
763 | ||
764 | dn = kmalloc(UBIFS_MAX_DATA_NODE_SZ, GFP_NOFS); | |
165f9859 DM |
765 | if (!dn) |
766 | return -ENOMEM; | |
9eefe2a2 SR |
767 | |
768 | i = 0; | |
769 | while (1) { | |
770 | int ret; | |
771 | ||
772 | if (block >= beyond) { | |
773 | /* Reading beyond inode */ | |
774 | err = -ENOENT; | |
775 | memset(addr, 0, UBIFS_BLOCK_SIZE); | |
776 | } else { | |
b1a14f8a SR |
777 | /* |
778 | * Reading last block? Make sure to not write beyond | |
779 | * the requested size in the destination buffer. | |
780 | */ | |
781 | if (((block + 1) == beyond) || last_block_size) { | |
782 | void *buff; | |
783 | int dlen; | |
784 | ||
785 | /* | |
786 | * We need to buffer the data locally for the | |
787 | * last block. This is to not pad the | |
788 | * destination area to a multiple of | |
789 | * UBIFS_BLOCK_SIZE. | |
790 | */ | |
4519668b | 791 | buff = malloc_cache_aligned(UBIFS_BLOCK_SIZE); |
b1a14f8a SR |
792 | if (!buff) { |
793 | printf("%s: Error, malloc fails!\n", | |
794 | __func__); | |
795 | err = -ENOMEM; | |
9eefe2a2 | 796 | break; |
b1a14f8a SR |
797 | } |
798 | ||
799 | /* Read block-size into temp buffer */ | |
800 | ret = read_block(inode, buff, block, dn); | |
801 | if (ret) { | |
802 | err = ret; | |
803 | if (err != -ENOENT) { | |
804 | free(buff); | |
805 | break; | |
806 | } | |
807 | } | |
808 | ||
809 | if (last_block_size) | |
810 | dlen = last_block_size; | |
811 | else | |
812 | dlen = le32_to_cpu(dn->size); | |
813 | ||
814 | /* Now copy required size back to dest */ | |
815 | memcpy(addr, buff, dlen); | |
816 | ||
817 | free(buff); | |
818 | } else { | |
819 | ret = read_block(inode, addr, block, dn); | |
820 | if (ret) { | |
821 | err = ret; | |
822 | if (err != -ENOENT) | |
823 | break; | |
824 | } | |
9eefe2a2 SR |
825 | } |
826 | } | |
827 | if (++i >= UBIFS_BLOCKS_PER_PAGE) | |
828 | break; | |
829 | block += 1; | |
830 | addr += UBIFS_BLOCK_SIZE; | |
831 | } | |
832 | if (err) { | |
833 | if (err == -ENOENT) { | |
834 | /* Not found, so it must be a hole */ | |
835 | dbg_gen("hole"); | |
836 | goto out_free; | |
837 | } | |
0195a7bb | 838 | ubifs_err(c, "cannot read page %lu of inode %lu, error %d", |
9eefe2a2 SR |
839 | page->index, inode->i_ino, err); |
840 | goto error; | |
841 | } | |
842 | ||
843 | out_free: | |
844 | kfree(dn); | |
845 | out: | |
846 | return 0; | |
847 | ||
848 | error: | |
849 | kfree(dn); | |
850 | return err; | |
851 | } | |
852 | ||
ad15749b HG |
853 | int ubifs_read(const char *filename, void *buf, loff_t offset, |
854 | loff_t size, loff_t *actread) | |
9eefe2a2 SR |
855 | { |
856 | struct ubifs_info *c = ubifs_sb->s_fs_info; | |
857 | unsigned long inum; | |
858 | struct inode *inode; | |
859 | struct page page; | |
860 | int err = 0; | |
861 | int i; | |
862 | int count; | |
b1a14f8a | 863 | int last_block_size = 0; |
9eefe2a2 | 864 | |
ad15749b HG |
865 | *actread = 0; |
866 | ||
867 | if (offset & (PAGE_SIZE - 1)) { | |
868 | printf("ubifs: Error offset must be a multple of %d\n", | |
869 | PAGE_SIZE); | |
870 | return -1; | |
871 | } | |
872 | ||
9eefe2a2 | 873 | c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY); |
9d7952e4 SK |
874 | /* ubifs_findfile will resolve symlinks, so we know that we get |
875 | * the real file here */ | |
ad15749b | 876 | inum = ubifs_findfile(ubifs_sb, (char *)filename); |
9eefe2a2 SR |
877 | if (!inum) { |
878 | err = -1; | |
879 | goto out; | |
880 | } | |
881 | ||
882 | /* | |
883 | * Read file inode | |
884 | */ | |
885 | inode = ubifs_iget(ubifs_sb, inum); | |
886 | if (IS_ERR(inode)) { | |
887 | printf("%s: Error reading inode %ld!\n", __func__, inum); | |
888 | err = PTR_ERR(inode); | |
889 | goto out; | |
890 | } | |
891 | ||
ad15749b HG |
892 | if (offset > inode->i_size) { |
893 | printf("ubifs: Error offset (%lld) > file-size (%lld)\n", | |
894 | offset, size); | |
895 | err = -1; | |
896 | goto put_inode; | |
897 | } | |
898 | ||
9eefe2a2 SR |
899 | /* |
900 | * If no size was specified or if size bigger than filesize | |
901 | * set size to filesize | |
902 | */ | |
ad15749b HG |
903 | if ((size == 0) || (size > (inode->i_size - offset))) |
904 | size = inode->i_size - offset; | |
9eefe2a2 SR |
905 | |
906 | count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT; | |
9eefe2a2 | 907 | |
ad15749b HG |
908 | page.addr = buf; |
909 | page.index = offset / PAGE_SIZE; | |
9eefe2a2 SR |
910 | page.inode = inode; |
911 | for (i = 0; i < count; i++) { | |
b1a14f8a SR |
912 | /* |
913 | * Make sure to not read beyond the requested size | |
914 | */ | |
915 | if (((i + 1) == count) && (size < inode->i_size)) | |
916 | last_block_size = size - (i * PAGE_SIZE); | |
917 | ||
918 | err = do_readpage(c, inode, &page, last_block_size); | |
9eefe2a2 SR |
919 | if (err) |
920 | break; | |
921 | ||
922 | page.addr += PAGE_SIZE; | |
923 | page.index++; | |
924 | } | |
925 | ||
ad15749b | 926 | if (err) { |
9eefe2a2 | 927 | printf("Error reading file '%s'\n", filename); |
ad15749b HG |
928 | *actread = i * PAGE_SIZE; |
929 | } else { | |
930 | *actread = size; | |
46d7274c | 931 | } |
9eefe2a2 | 932 | |
ad15749b | 933 | put_inode: |
9eefe2a2 SR |
934 | ubifs_iput(inode); |
935 | ||
936 | out: | |
937 | ubi_close_volume(c->ubi); | |
938 | return err; | |
939 | } | |
ad15749b | 940 | |
29cc5bca HG |
941 | void ubifs_close(void) |
942 | { | |
943 | } | |
944 | ||
ad15749b HG |
945 | /* Compat wrappers for common/cmd_ubifs.c */ |
946 | int ubifs_load(char *filename, u32 addr, u32 size) | |
947 | { | |
948 | loff_t actread; | |
949 | int err; | |
950 | ||
951 | printf("Loading file '%s' to addr 0x%08x...\n", filename, addr); | |
952 | ||
953 | err = ubifs_read(filename, (void *)addr, 0, size, &actread); | |
954 | if (err == 0) { | |
955 | setenv_hex("filesize", actread); | |
956 | printf("Done\n"); | |
957 | } | |
958 | ||
959 | return err; | |
960 | } | |
961 | ||
962 | void uboot_ubifs_umount(void) | |
963 | { | |
964 | if (ubifs_sb) { | |
965 | printf("Unmounting UBIFS volume %s!\n", | |
966 | ((struct ubifs_info *)(ubifs_sb->s_fs_info))->vi.name); | |
967 | ubifs_umount(ubifs_sb->s_fs_info); | |
968 | ubifs_sb = NULL; | |
969 | } | |
970 | } |