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Commit | Line | Data |
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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
9eefe2a2 SR |
2 | /* |
3 | * This file is part of UBIFS. | |
4 | * | |
5 | * Copyright (C) 2006-2008 Nokia Corporation. | |
6 | * | |
b1a14f8a | 7 | * (C) Copyright 2008-2010 |
9eefe2a2 SR |
8 | * Stefan Roese, DENX Software Engineering, sr@denx.de. |
9 | * | |
9eefe2a2 SR |
10 | * Authors: Artem Bityutskiy (Битюцкий Артём) |
11 | * Adrian Hunter | |
12 | */ | |
13 | ||
6e295186 | 14 | #include <common.h> |
c7694dd4 | 15 | #include <env.h> |
0c670fc1 | 16 | #include <gzip.h> |
6e295186 | 17 | #include <memalign.h> |
9eefe2a2 | 18 | #include "ubifs.h" |
c1a0fd5f | 19 | #include <u-boot/zlib.h> |
9eefe2a2 | 20 | |
4839e868 | 21 | #include <linux/compat.h> |
ff94bc40 HS |
22 | #include <linux/err.h> |
23 | #include <linux/lzo.h> | |
24 | ||
9eefe2a2 SR |
25 | DECLARE_GLOBAL_DATA_PTR; |
26 | ||
27 | /* compress.c */ | |
28 | ||
29 | /* | |
c1a0fd5f | 30 | * We need a wrapper for zunzip() because the parameters are |
9eefe2a2 SR |
31 | * incompatible with the lzo decompressor. |
32 | */ | |
33 | static int gzip_decompress(const unsigned char *in, size_t in_len, | |
34 | unsigned char *out, size_t *out_len) | |
35 | { | |
8044c138 VPP |
36 | return zunzip(out, *out_len, (unsigned char *)in, |
37 | (unsigned long *)out_len, 0, 0); | |
9eefe2a2 SR |
38 | } |
39 | ||
40 | /* Fake description object for the "none" compressor */ | |
41 | static struct ubifs_compressor none_compr = { | |
42 | .compr_type = UBIFS_COMPR_NONE, | |
ff94bc40 | 43 | .name = "none", |
9eefe2a2 SR |
44 | .capi_name = "", |
45 | .decompress = NULL, | |
46 | }; | |
47 | ||
48 | static struct ubifs_compressor lzo_compr = { | |
49 | .compr_type = UBIFS_COMPR_LZO, | |
ff94bc40 HS |
50 | #ifndef __UBOOT__ |
51 | .comp_mutex = &lzo_mutex, | |
52 | #endif | |
53 | .name = "lzo", | |
9eefe2a2 SR |
54 | .capi_name = "lzo", |
55 | .decompress = lzo1x_decompress_safe, | |
56 | }; | |
57 | ||
58 | static struct ubifs_compressor zlib_compr = { | |
59 | .compr_type = UBIFS_COMPR_ZLIB, | |
ff94bc40 HS |
60 | #ifndef __UBOOT__ |
61 | .comp_mutex = &deflate_mutex, | |
62 | .decomp_mutex = &inflate_mutex, | |
63 | #endif | |
9eefe2a2 SR |
64 | .name = "zlib", |
65 | .capi_name = "deflate", | |
66 | .decompress = gzip_decompress, | |
67 | }; | |
68 | ||
69 | /* All UBIFS compressors */ | |
70 | struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT]; | |
71 | ||
ff94bc40 HS |
72 | |
73 | #ifdef __UBOOT__ | |
ff94bc40 HS |
74 | |
75 | struct crypto_comp { | |
76 | int compressor; | |
77 | }; | |
78 | ||
0195a7bb HS |
79 | static inline struct crypto_comp |
80 | *crypto_alloc_comp(const char *alg_name, u32 type, u32 mask) | |
ff94bc40 HS |
81 | { |
82 | struct ubifs_compressor *comp; | |
83 | struct crypto_comp *ptr; | |
84 | int i = 0; | |
85 | ||
4519668b | 86 | ptr = malloc_cache_aligned(sizeof(struct crypto_comp)); |
ff94bc40 HS |
87 | while (i < UBIFS_COMPR_TYPES_CNT) { |
88 | comp = ubifs_compressors[i]; | |
89 | if (!comp) { | |
90 | i++; | |
91 | continue; | |
92 | } | |
93 | if (strncmp(alg_name, comp->capi_name, strlen(alg_name)) == 0) { | |
94 | ptr->compressor = i; | |
95 | return ptr; | |
96 | } | |
97 | i++; | |
98 | } | |
99 | if (i >= UBIFS_COMPR_TYPES_CNT) { | |
0195a7bb | 100 | dbg_gen("invalid compression type %s", alg_name); |
ff94bc40 HS |
101 | free (ptr); |
102 | return NULL; | |
103 | } | |
104 | return ptr; | |
105 | } | |
0195a7bb HS |
106 | static inline int |
107 | crypto_comp_decompress(const struct ubifs_info *c, struct crypto_comp *tfm, | |
108 | const u8 *src, unsigned int slen, u8 *dst, | |
109 | unsigned int *dlen) | |
ff94bc40 HS |
110 | { |
111 | struct ubifs_compressor *compr = ubifs_compressors[tfm->compressor]; | |
112 | int err; | |
e4aa10ba | 113 | size_t tmp_len = *dlen; |
ff94bc40 HS |
114 | |
115 | if (compr->compr_type == UBIFS_COMPR_NONE) { | |
116 | memcpy(dst, src, slen); | |
117 | *dlen = slen; | |
118 | return 0; | |
119 | } | |
120 | ||
e4aa10ba | 121 | err = compr->decompress(src, slen, dst, &tmp_len); |
ff94bc40 | 122 | if (err) |
0195a7bb | 123 | ubifs_err(c, "cannot decompress %d bytes, compressor %s, " |
ff94bc40 HS |
124 | "error %d", slen, compr->name, err); |
125 | ||
e4aa10ba | 126 | *dlen = tmp_len; |
ff94bc40 HS |
127 | return err; |
128 | ||
129 | return 0; | |
130 | } | |
dc288431 AH |
131 | |
132 | /* from shrinker.c */ | |
133 | ||
134 | /* Global clean znode counter (for all mounted UBIFS instances) */ | |
135 | atomic_long_t ubifs_clean_zn_cnt; | |
136 | ||
ff94bc40 HS |
137 | #endif |
138 | ||
9eefe2a2 SR |
139 | /** |
140 | * ubifs_decompress - decompress data. | |
141 | * @in_buf: data to decompress | |
142 | * @in_len: length of the data to decompress | |
143 | * @out_buf: output buffer where decompressed data should | |
144 | * @out_len: output length is returned here | |
145 | * @compr_type: type of compression | |
146 | * | |
147 | * This function decompresses data from buffer @in_buf into buffer @out_buf. | |
148 | * The length of the uncompressed data is returned in @out_len. This functions | |
149 | * returns %0 on success or a negative error code on failure. | |
150 | */ | |
0195a7bb HS |
151 | int ubifs_decompress(const struct ubifs_info *c, const void *in_buf, |
152 | int in_len, void *out_buf, int *out_len, int compr_type) | |
9eefe2a2 SR |
153 | { |
154 | int err; | |
155 | struct ubifs_compressor *compr; | |
156 | ||
157 | if (unlikely(compr_type < 0 || compr_type >= UBIFS_COMPR_TYPES_CNT)) { | |
0195a7bb | 158 | ubifs_err(c, "invalid compression type %d", compr_type); |
9eefe2a2 SR |
159 | return -EINVAL; |
160 | } | |
161 | ||
162 | compr = ubifs_compressors[compr_type]; | |
163 | ||
164 | if (unlikely(!compr->capi_name)) { | |
0195a7bb | 165 | ubifs_err(c, "%s compression is not compiled in", compr->name); |
9eefe2a2 SR |
166 | return -EINVAL; |
167 | } | |
168 | ||
169 | if (compr_type == UBIFS_COMPR_NONE) { | |
170 | memcpy(out_buf, in_buf, in_len); | |
171 | *out_len = in_len; | |
172 | return 0; | |
173 | } | |
174 | ||
ff94bc40 HS |
175 | if (compr->decomp_mutex) |
176 | mutex_lock(compr->decomp_mutex); | |
0195a7bb | 177 | err = crypto_comp_decompress(c, compr->cc, in_buf, in_len, out_buf, |
ff94bc40 HS |
178 | (unsigned int *)out_len); |
179 | if (compr->decomp_mutex) | |
180 | mutex_unlock(compr->decomp_mutex); | |
9eefe2a2 | 181 | if (err) |
0195a7bb HS |
182 | ubifs_err(c, "cannot decompress %d bytes, compressor %s," |
183 | " error %d", in_len, compr->name, err); | |
9eefe2a2 SR |
184 | |
185 | return err; | |
186 | } | |
187 | ||
188 | /** | |
189 | * compr_init - initialize a compressor. | |
190 | * @compr: compressor description object | |
191 | * | |
192 | * This function initializes the requested compressor and returns zero in case | |
193 | * of success or a negative error code in case of failure. | |
194 | */ | |
195 | static int __init compr_init(struct ubifs_compressor *compr) | |
196 | { | |
197 | ubifs_compressors[compr->compr_type] = compr; | |
521af04d | 198 | |
2e5167cc | 199 | #ifdef CONFIG_NEEDS_MANUAL_RELOC |
9eefe2a2 SR |
200 | ubifs_compressors[compr->compr_type]->name += gd->reloc_off; |
201 | ubifs_compressors[compr->compr_type]->capi_name += gd->reloc_off; | |
202 | ubifs_compressors[compr->compr_type]->decompress += gd->reloc_off; | |
521af04d PT |
203 | #endif |
204 | ||
ff94bc40 HS |
205 | if (compr->capi_name) { |
206 | compr->cc = crypto_alloc_comp(compr->capi_name, 0, 0); | |
207 | if (IS_ERR(compr->cc)) { | |
0195a7bb HS |
208 | dbg_gen("cannot initialize compressor %s," |
209 | " error %ld", compr->name, | |
210 | PTR_ERR(compr->cc)); | |
ff94bc40 HS |
211 | return PTR_ERR(compr->cc); |
212 | } | |
213 | } | |
214 | ||
9eefe2a2 SR |
215 | return 0; |
216 | } | |
217 | ||
218 | /** | |
219 | * ubifs_compressors_init - initialize UBIFS compressors. | |
220 | * | |
221 | * This function initializes the compressor which were compiled in. Returns | |
222 | * zero in case of success and a negative error code in case of failure. | |
223 | */ | |
224 | int __init ubifs_compressors_init(void) | |
225 | { | |
226 | int err; | |
227 | ||
228 | err = compr_init(&lzo_compr); | |
229 | if (err) | |
230 | return err; | |
231 | ||
232 | err = compr_init(&zlib_compr); | |
233 | if (err) | |
234 | return err; | |
235 | ||
faac4fd8 ML |
236 | err = compr_init(&none_compr); |
237 | if (err) | |
238 | return err; | |
239 | ||
9eefe2a2 SR |
240 | return 0; |
241 | } | |
242 | ||
243 | /* | |
244 | * ubifsls... | |
245 | */ | |
246 | ||
247 | static int filldir(struct ubifs_info *c, const char *name, int namlen, | |
248 | u64 ino, unsigned int d_type) | |
249 | { | |
250 | struct inode *inode; | |
251 | char filetime[32]; | |
252 | ||
253 | switch (d_type) { | |
254 | case UBIFS_ITYPE_REG: | |
255 | printf("\t"); | |
256 | break; | |
257 | case UBIFS_ITYPE_DIR: | |
258 | printf("<DIR>\t"); | |
259 | break; | |
260 | case UBIFS_ITYPE_LNK: | |
261 | printf("<LNK>\t"); | |
262 | break; | |
263 | default: | |
264 | printf("other\t"); | |
265 | break; | |
266 | } | |
267 | ||
268 | inode = ubifs_iget(c->vfs_sb, ino); | |
269 | if (IS_ERR(inode)) { | |
270 | printf("%s: Error in ubifs_iget(), ino=%lld ret=%p!\n", | |
271 | __func__, ino, inode); | |
272 | return -1; | |
273 | } | |
274 | ctime_r((time_t *)&inode->i_mtime, filetime); | |
275 | printf("%9lld %24.24s ", inode->i_size, filetime); | |
ff94bc40 | 276 | #ifndef __UBOOT__ |
9eefe2a2 | 277 | ubifs_iput(inode); |
ff94bc40 | 278 | #endif |
9eefe2a2 SR |
279 | |
280 | printf("%s\n", name); | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | static int ubifs_printdir(struct file *file, void *dirent) | |
286 | { | |
287 | int err, over = 0; | |
288 | struct qstr nm; | |
289 | union ubifs_key key; | |
290 | struct ubifs_dent_node *dent; | |
291 | struct inode *dir = file->f_path.dentry->d_inode; | |
292 | struct ubifs_info *c = dir->i_sb->s_fs_info; | |
293 | ||
294 | dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, file->f_pos); | |
295 | ||
296 | if (file->f_pos > UBIFS_S_KEY_HASH_MASK || file->f_pos == 2) | |
297 | /* | |
298 | * The directory was seek'ed to a senseless position or there | |
299 | * are no more entries. | |
300 | */ | |
301 | return 0; | |
302 | ||
303 | if (file->f_pos == 1) { | |
304 | /* Find the first entry in TNC and save it */ | |
305 | lowest_dent_key(c, &key, dir->i_ino); | |
306 | nm.name = NULL; | |
307 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
308 | if (IS_ERR(dent)) { | |
309 | err = PTR_ERR(dent); | |
310 | goto out; | |
311 | } | |
312 | ||
313 | file->f_pos = key_hash_flash(c, &dent->key); | |
314 | file->private_data = dent; | |
315 | } | |
316 | ||
317 | dent = file->private_data; | |
318 | if (!dent) { | |
319 | /* | |
320 | * The directory was seek'ed to and is now readdir'ed. | |
321 | * Find the entry corresponding to @file->f_pos or the | |
322 | * closest one. | |
323 | */ | |
324 | dent_key_init_hash(c, &key, dir->i_ino, file->f_pos); | |
325 | nm.name = NULL; | |
326 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
327 | if (IS_ERR(dent)) { | |
328 | err = PTR_ERR(dent); | |
329 | goto out; | |
330 | } | |
331 | file->f_pos = key_hash_flash(c, &dent->key); | |
332 | file->private_data = dent; | |
333 | } | |
334 | ||
335 | while (1) { | |
336 | dbg_gen("feed '%s', ino %llu, new f_pos %#x", | |
337 | dent->name, (unsigned long long)le64_to_cpu(dent->inum), | |
338 | key_hash_flash(c, &dent->key)); | |
87deefec | 339 | #ifndef __UBOOT__ |
9eefe2a2 | 340 | ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum); |
87deefec | 341 | #endif |
9eefe2a2 SR |
342 | |
343 | nm.len = le16_to_cpu(dent->nlen); | |
344 | over = filldir(c, (char *)dent->name, nm.len, | |
345 | le64_to_cpu(dent->inum), dent->type); | |
346 | if (over) | |
347 | return 0; | |
348 | ||
349 | /* Switch to the next entry */ | |
350 | key_read(c, &dent->key, &key); | |
351 | nm.name = (char *)dent->name; | |
352 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
353 | if (IS_ERR(dent)) { | |
354 | err = PTR_ERR(dent); | |
355 | goto out; | |
356 | } | |
357 | ||
358 | kfree(file->private_data); | |
359 | file->f_pos = key_hash_flash(c, &dent->key); | |
360 | file->private_data = dent; | |
361 | cond_resched(); | |
362 | } | |
363 | ||
364 | out: | |
365 | if (err != -ENOENT) { | |
0195a7bb | 366 | ubifs_err(c, "cannot find next direntry, error %d", err); |
9eefe2a2 SR |
367 | return err; |
368 | } | |
369 | ||
370 | kfree(file->private_data); | |
371 | file->private_data = NULL; | |
372 | file->f_pos = 2; | |
373 | return 0; | |
374 | } | |
375 | ||
376 | static int ubifs_finddir(struct super_block *sb, char *dirname, | |
377 | unsigned long root_inum, unsigned long *inum) | |
378 | { | |
379 | int err; | |
380 | struct qstr nm; | |
381 | union ubifs_key key; | |
382 | struct ubifs_dent_node *dent; | |
383 | struct ubifs_info *c; | |
384 | struct file *file; | |
385 | struct dentry *dentry; | |
386 | struct inode *dir; | |
be73913b | 387 | int ret = 0; |
9eefe2a2 SR |
388 | |
389 | file = kzalloc(sizeof(struct file), 0); | |
390 | dentry = kzalloc(sizeof(struct dentry), 0); | |
391 | dir = kzalloc(sizeof(struct inode), 0); | |
392 | if (!file || !dentry || !dir) { | |
393 | printf("%s: Error, no memory for malloc!\n", __func__); | |
394 | err = -ENOMEM; | |
395 | goto out; | |
396 | } | |
397 | ||
398 | dir->i_sb = sb; | |
399 | file->f_path.dentry = dentry; | |
400 | file->f_path.dentry->d_parent = dentry; | |
401 | file->f_path.dentry->d_inode = dir; | |
402 | file->f_path.dentry->d_inode->i_ino = root_inum; | |
403 | c = sb->s_fs_info; | |
404 | ||
405 | dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, file->f_pos); | |
406 | ||
407 | /* Find the first entry in TNC and save it */ | |
408 | lowest_dent_key(c, &key, dir->i_ino); | |
409 | nm.name = NULL; | |
410 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
411 | if (IS_ERR(dent)) { | |
412 | err = PTR_ERR(dent); | |
413 | goto out; | |
414 | } | |
415 | ||
416 | file->f_pos = key_hash_flash(c, &dent->key); | |
417 | file->private_data = dent; | |
418 | ||
419 | while (1) { | |
420 | dbg_gen("feed '%s', ino %llu, new f_pos %#x", | |
421 | dent->name, (unsigned long long)le64_to_cpu(dent->inum), | |
422 | key_hash_flash(c, &dent->key)); | |
87deefec | 423 | #ifndef __UBOOT__ |
9eefe2a2 | 424 | ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum); |
87deefec | 425 | #endif |
9eefe2a2 SR |
426 | |
427 | nm.len = le16_to_cpu(dent->nlen); | |
428 | if ((strncmp(dirname, (char *)dent->name, nm.len) == 0) && | |
429 | (strlen(dirname) == nm.len)) { | |
430 | *inum = le64_to_cpu(dent->inum); | |
be73913b SR |
431 | ret = 1; |
432 | goto out_free; | |
9eefe2a2 SR |
433 | } |
434 | ||
435 | /* Switch to the next entry */ | |
436 | key_read(c, &dent->key, &key); | |
437 | nm.name = (char *)dent->name; | |
438 | dent = ubifs_tnc_next_ent(c, &key, &nm); | |
439 | if (IS_ERR(dent)) { | |
440 | err = PTR_ERR(dent); | |
441 | goto out; | |
442 | } | |
443 | ||
444 | kfree(file->private_data); | |
445 | file->f_pos = key_hash_flash(c, &dent->key); | |
446 | file->private_data = dent; | |
447 | cond_resched(); | |
448 | } | |
449 | ||
450 | out: | |
be73913b | 451 | if (err != -ENOENT) |
0195a7bb | 452 | dbg_gen("cannot find next direntry, error %d", err); |
9eefe2a2 | 453 | |
be73913b | 454 | out_free: |
4b29975f HS |
455 | kfree(file->private_data); |
456 | free(file); | |
457 | free(dentry); | |
458 | free(dir); | |
9eefe2a2 | 459 | |
be73913b | 460 | return ret; |
9eefe2a2 SR |
461 | } |
462 | ||
463 | static unsigned long ubifs_findfile(struct super_block *sb, char *filename) | |
464 | { | |
465 | int ret; | |
466 | char *next; | |
467 | char fpath[128]; | |
9d7952e4 | 468 | char symlinkpath[128]; |
9eefe2a2 SR |
469 | char *name = fpath; |
470 | unsigned long root_inum = 1; | |
471 | unsigned long inum; | |
9d7952e4 | 472 | int symlink_count = 0; /* Don't allow symlink recursion */ |
64b68178 | 473 | char link_name[64]; |
9eefe2a2 SR |
474 | |
475 | strcpy(fpath, filename); | |
476 | ||
477 | /* Remove all leading slashes */ | |
478 | while (*name == '/') | |
479 | name++; | |
480 | ||
481 | /* | |
482 | * Handle root-direcoty ('/') | |
483 | */ | |
484 | inum = root_inum; | |
485 | if (!name || *name == '\0') | |
486 | return inum; | |
487 | ||
488 | for (;;) { | |
9d7952e4 SK |
489 | struct inode *inode; |
490 | struct ubifs_inode *ui; | |
491 | ||
9eefe2a2 SR |
492 | /* Extract the actual part from the pathname. */ |
493 | next = strchr(name, '/'); | |
494 | if (next) { | |
495 | /* Remove all leading slashes. */ | |
496 | while (*next == '/') | |
497 | *(next++) = '\0'; | |
498 | } | |
499 | ||
500 | ret = ubifs_finddir(sb, name, root_inum, &inum); | |
9d7952e4 SK |
501 | if (!ret) |
502 | return 0; | |
503 | inode = ubifs_iget(sb, inum); | |
504 | ||
505 | if (!inode) | |
506 | return 0; | |
507 | ui = ubifs_inode(inode); | |
508 | ||
509 | if ((inode->i_mode & S_IFMT) == S_IFLNK) { | |
9d7952e4 SK |
510 | char buf[128]; |
511 | ||
512 | /* We have some sort of symlink recursion, bail out */ | |
513 | if (symlink_count++ > 8) { | |
514 | printf("Symlink recursion, aborting\n"); | |
515 | return 0; | |
516 | } | |
517 | memcpy(link_name, ui->data, ui->data_len); | |
518 | link_name[ui->data_len] = '\0'; | |
519 | ||
520 | if (link_name[0] == '/') { | |
521 | /* Absolute path, redo everything without | |
522 | * the leading slash */ | |
523 | next = name = link_name + 1; | |
524 | root_inum = 1; | |
525 | continue; | |
526 | } | |
527 | /* Relative to cur dir */ | |
ef37c683 | 528 | sprintf(buf, "%s/%s", |
9d7952e4 SK |
529 | link_name, next == NULL ? "" : next); |
530 | memcpy(symlinkpath, buf, sizeof(buf)); | |
531 | next = name = symlinkpath; | |
532 | continue; | |
533 | } | |
9eefe2a2 SR |
534 | |
535 | /* | |
536 | * Check if directory with this name exists | |
537 | */ | |
538 | ||
539 | /* Found the node! */ | |
9d7952e4 SK |
540 | if (!next || *next == '\0') |
541 | return inum; | |
9eefe2a2 SR |
542 | |
543 | root_inum = inum; | |
544 | name = next; | |
545 | } | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
4101f687 | 550 | int ubifs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info) |
29cc5bca HG |
551 | { |
552 | if (rbdd) { | |
553 | debug("UBIFS cannot be used with normal block devices\n"); | |
554 | return -1; | |
555 | } | |
556 | ||
557 | /* | |
e35929e4 | 558 | * Should never happen since blk_get_device_part_str() already checks |
29cc5bca HG |
559 | * this, but better safe then sorry. |
560 | */ | |
561 | if (!ubifs_is_mounted()) { | |
562 | debug("UBIFS not mounted, use ubifsmount to mount volume first!\n"); | |
563 | return -1; | |
564 | } | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
ad15749b | 569 | int ubifs_ls(const char *filename) |
9eefe2a2 SR |
570 | { |
571 | struct ubifs_info *c = ubifs_sb->s_fs_info; | |
572 | struct file *file; | |
573 | struct dentry *dentry; | |
574 | struct inode *dir; | |
575 | void *dirent = NULL; | |
576 | unsigned long inum; | |
577 | int ret = 0; | |
578 | ||
579 | c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY); | |
ad15749b | 580 | inum = ubifs_findfile(ubifs_sb, (char *)filename); |
9eefe2a2 SR |
581 | if (!inum) { |
582 | ret = -1; | |
583 | goto out; | |
584 | } | |
585 | ||
586 | file = kzalloc(sizeof(struct file), 0); | |
587 | dentry = kzalloc(sizeof(struct dentry), 0); | |
588 | dir = kzalloc(sizeof(struct inode), 0); | |
589 | if (!file || !dentry || !dir) { | |
590 | printf("%s: Error, no memory for malloc!\n", __func__); | |
591 | ret = -ENOMEM; | |
592 | goto out_mem; | |
593 | } | |
594 | ||
595 | dir->i_sb = ubifs_sb; | |
596 | file->f_path.dentry = dentry; | |
597 | file->f_path.dentry->d_parent = dentry; | |
598 | file->f_path.dentry->d_inode = dir; | |
599 | file->f_path.dentry->d_inode->i_ino = inum; | |
600 | file->f_pos = 1; | |
601 | file->private_data = NULL; | |
602 | ubifs_printdir(file, dirent); | |
603 | ||
604 | out_mem: | |
605 | if (file) | |
606 | free(file); | |
607 | if (dentry) | |
608 | free(dentry); | |
609 | if (dir) | |
610 | free(dir); | |
611 | ||
612 | out: | |
613 | ubi_close_volume(c->ubi); | |
614 | return ret; | |
615 | } | |
616 | ||
29cc5bca HG |
617 | int ubifs_exists(const char *filename) |
618 | { | |
619 | struct ubifs_info *c = ubifs_sb->s_fs_info; | |
620 | unsigned long inum; | |
621 | ||
622 | c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY); | |
623 | inum = ubifs_findfile(ubifs_sb, (char *)filename); | |
624 | ubi_close_volume(c->ubi); | |
625 | ||
626 | return inum != 0; | |
627 | } | |
628 | ||
629 | int ubifs_size(const char *filename, loff_t *size) | |
630 | { | |
631 | struct ubifs_info *c = ubifs_sb->s_fs_info; | |
632 | unsigned long inum; | |
633 | struct inode *inode; | |
634 | int err = 0; | |
635 | ||
636 | c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY); | |
637 | ||
638 | inum = ubifs_findfile(ubifs_sb, (char *)filename); | |
639 | if (!inum) { | |
640 | err = -1; | |
641 | goto out; | |
642 | } | |
643 | ||
644 | inode = ubifs_iget(ubifs_sb, inum); | |
645 | if (IS_ERR(inode)) { | |
646 | printf("%s: Error reading inode %ld!\n", __func__, inum); | |
647 | err = PTR_ERR(inode); | |
648 | goto out; | |
649 | } | |
650 | ||
651 | *size = inode->i_size; | |
652 | ||
653 | ubifs_iput(inode); | |
654 | out: | |
655 | ubi_close_volume(c->ubi); | |
656 | return err; | |
657 | } | |
658 | ||
9eefe2a2 SR |
659 | /* |
660 | * ubifsload... | |
661 | */ | |
662 | ||
663 | /* file.c */ | |
664 | ||
665 | static inline void *kmap(struct page *page) | |
666 | { | |
667 | return page->addr; | |
668 | } | |
669 | ||
670 | static int read_block(struct inode *inode, void *addr, unsigned int block, | |
671 | struct ubifs_data_node *dn) | |
672 | { | |
673 | struct ubifs_info *c = inode->i_sb->s_fs_info; | |
674 | int err, len, out_len; | |
675 | union ubifs_key key; | |
676 | unsigned int dlen; | |
677 | ||
678 | data_key_init(c, &key, inode->i_ino, block); | |
679 | err = ubifs_tnc_lookup(c, &key, dn); | |
680 | if (err) { | |
681 | if (err == -ENOENT) | |
682 | /* Not found, so it must be a hole */ | |
683 | memset(addr, 0, UBIFS_BLOCK_SIZE); | |
684 | return err; | |
685 | } | |
686 | ||
687 | ubifs_assert(le64_to_cpu(dn->ch.sqnum) > ubifs_inode(inode)->creat_sqnum); | |
688 | ||
689 | len = le32_to_cpu(dn->size); | |
690 | if (len <= 0 || len > UBIFS_BLOCK_SIZE) | |
691 | goto dump; | |
692 | ||
693 | dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ; | |
694 | out_len = UBIFS_BLOCK_SIZE; | |
0195a7bb | 695 | err = ubifs_decompress(c, &dn->data, dlen, addr, &out_len, |
9eefe2a2 SR |
696 | le16_to_cpu(dn->compr_type)); |
697 | if (err || len != out_len) | |
698 | goto dump; | |
699 | ||
700 | /* | |
701 | * Data length can be less than a full block, even for blocks that are | |
702 | * not the last in the file (e.g., as a result of making a hole and | |
703 | * appending data). Ensure that the remainder is zeroed out. | |
704 | */ | |
705 | if (len < UBIFS_BLOCK_SIZE) | |
706 | memset(addr + len, 0, UBIFS_BLOCK_SIZE - len); | |
707 | ||
708 | return 0; | |
709 | ||
710 | dump: | |
0195a7bb | 711 | ubifs_err(c, "bad data node (block %u, inode %lu)", |
9eefe2a2 | 712 | block, inode->i_ino); |
ff94bc40 | 713 | ubifs_dump_node(c, dn); |
9eefe2a2 SR |
714 | return -EINVAL; |
715 | } | |
716 | ||
b1a14f8a SR |
717 | static int do_readpage(struct ubifs_info *c, struct inode *inode, |
718 | struct page *page, int last_block_size) | |
9eefe2a2 SR |
719 | { |
720 | void *addr; | |
721 | int err = 0, i; | |
722 | unsigned int block, beyond; | |
723 | struct ubifs_data_node *dn; | |
724 | loff_t i_size = inode->i_size; | |
725 | ||
726 | dbg_gen("ino %lu, pg %lu, i_size %lld", | |
727 | inode->i_ino, page->index, i_size); | |
728 | ||
729 | addr = kmap(page); | |
730 | ||
731 | block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT; | |
732 | beyond = (i_size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT; | |
733 | if (block >= beyond) { | |
734 | /* Reading beyond inode */ | |
735 | memset(addr, 0, PAGE_CACHE_SIZE); | |
736 | goto out; | |
737 | } | |
738 | ||
739 | dn = kmalloc(UBIFS_MAX_DATA_NODE_SZ, GFP_NOFS); | |
165f9859 DM |
740 | if (!dn) |
741 | return -ENOMEM; | |
9eefe2a2 SR |
742 | |
743 | i = 0; | |
744 | while (1) { | |
745 | int ret; | |
746 | ||
747 | if (block >= beyond) { | |
748 | /* Reading beyond inode */ | |
749 | err = -ENOENT; | |
750 | memset(addr, 0, UBIFS_BLOCK_SIZE); | |
751 | } else { | |
b1a14f8a SR |
752 | /* |
753 | * Reading last block? Make sure to not write beyond | |
754 | * the requested size in the destination buffer. | |
755 | */ | |
756 | if (((block + 1) == beyond) || last_block_size) { | |
757 | void *buff; | |
758 | int dlen; | |
759 | ||
760 | /* | |
761 | * We need to buffer the data locally for the | |
762 | * last block. This is to not pad the | |
763 | * destination area to a multiple of | |
764 | * UBIFS_BLOCK_SIZE. | |
765 | */ | |
4519668b | 766 | buff = malloc_cache_aligned(UBIFS_BLOCK_SIZE); |
b1a14f8a SR |
767 | if (!buff) { |
768 | printf("%s: Error, malloc fails!\n", | |
769 | __func__); | |
770 | err = -ENOMEM; | |
9eefe2a2 | 771 | break; |
b1a14f8a SR |
772 | } |
773 | ||
774 | /* Read block-size into temp buffer */ | |
775 | ret = read_block(inode, buff, block, dn); | |
776 | if (ret) { | |
777 | err = ret; | |
778 | if (err != -ENOENT) { | |
779 | free(buff); | |
780 | break; | |
781 | } | |
782 | } | |
783 | ||
784 | if (last_block_size) | |
785 | dlen = last_block_size; | |
786 | else | |
787 | dlen = le32_to_cpu(dn->size); | |
788 | ||
789 | /* Now copy required size back to dest */ | |
790 | memcpy(addr, buff, dlen); | |
791 | ||
792 | free(buff); | |
793 | } else { | |
794 | ret = read_block(inode, addr, block, dn); | |
795 | if (ret) { | |
796 | err = ret; | |
797 | if (err != -ENOENT) | |
798 | break; | |
799 | } | |
9eefe2a2 SR |
800 | } |
801 | } | |
802 | if (++i >= UBIFS_BLOCKS_PER_PAGE) | |
803 | break; | |
804 | block += 1; | |
805 | addr += UBIFS_BLOCK_SIZE; | |
806 | } | |
807 | if (err) { | |
808 | if (err == -ENOENT) { | |
809 | /* Not found, so it must be a hole */ | |
810 | dbg_gen("hole"); | |
811 | goto out_free; | |
812 | } | |
0195a7bb | 813 | ubifs_err(c, "cannot read page %lu of inode %lu, error %d", |
9eefe2a2 SR |
814 | page->index, inode->i_ino, err); |
815 | goto error; | |
816 | } | |
817 | ||
818 | out_free: | |
819 | kfree(dn); | |
820 | out: | |
821 | return 0; | |
822 | ||
823 | error: | |
824 | kfree(dn); | |
825 | return err; | |
826 | } | |
827 | ||
ad15749b HG |
828 | int ubifs_read(const char *filename, void *buf, loff_t offset, |
829 | loff_t size, loff_t *actread) | |
9eefe2a2 SR |
830 | { |
831 | struct ubifs_info *c = ubifs_sb->s_fs_info; | |
832 | unsigned long inum; | |
833 | struct inode *inode; | |
834 | struct page page; | |
835 | int err = 0; | |
836 | int i; | |
837 | int count; | |
b1a14f8a | 838 | int last_block_size = 0; |
9eefe2a2 | 839 | |
ad15749b HG |
840 | *actread = 0; |
841 | ||
842 | if (offset & (PAGE_SIZE - 1)) { | |
1381901e | 843 | printf("ubifs: Error offset must be a multiple of %d\n", |
ad15749b HG |
844 | PAGE_SIZE); |
845 | return -1; | |
846 | } | |
847 | ||
9eefe2a2 | 848 | c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY); |
9d7952e4 SK |
849 | /* ubifs_findfile will resolve symlinks, so we know that we get |
850 | * the real file here */ | |
ad15749b | 851 | inum = ubifs_findfile(ubifs_sb, (char *)filename); |
9eefe2a2 SR |
852 | if (!inum) { |
853 | err = -1; | |
854 | goto out; | |
855 | } | |
856 | ||
857 | /* | |
858 | * Read file inode | |
859 | */ | |
860 | inode = ubifs_iget(ubifs_sb, inum); | |
861 | if (IS_ERR(inode)) { | |
862 | printf("%s: Error reading inode %ld!\n", __func__, inum); | |
863 | err = PTR_ERR(inode); | |
864 | goto out; | |
865 | } | |
866 | ||
ad15749b HG |
867 | if (offset > inode->i_size) { |
868 | printf("ubifs: Error offset (%lld) > file-size (%lld)\n", | |
869 | offset, size); | |
870 | err = -1; | |
871 | goto put_inode; | |
872 | } | |
873 | ||
9eefe2a2 SR |
874 | /* |
875 | * If no size was specified or if size bigger than filesize | |
876 | * set size to filesize | |
877 | */ | |
ad15749b HG |
878 | if ((size == 0) || (size > (inode->i_size - offset))) |
879 | size = inode->i_size - offset; | |
9eefe2a2 SR |
880 | |
881 | count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT; | |
9eefe2a2 | 882 | |
ad15749b HG |
883 | page.addr = buf; |
884 | page.index = offset / PAGE_SIZE; | |
9eefe2a2 SR |
885 | page.inode = inode; |
886 | for (i = 0; i < count; i++) { | |
b1a14f8a SR |
887 | /* |
888 | * Make sure to not read beyond the requested size | |
889 | */ | |
890 | if (((i + 1) == count) && (size < inode->i_size)) | |
891 | last_block_size = size - (i * PAGE_SIZE); | |
892 | ||
893 | err = do_readpage(c, inode, &page, last_block_size); | |
9eefe2a2 SR |
894 | if (err) |
895 | break; | |
896 | ||
897 | page.addr += PAGE_SIZE; | |
898 | page.index++; | |
899 | } | |
900 | ||
ad15749b | 901 | if (err) { |
9eefe2a2 | 902 | printf("Error reading file '%s'\n", filename); |
ad15749b HG |
903 | *actread = i * PAGE_SIZE; |
904 | } else { | |
905 | *actread = size; | |
46d7274c | 906 | } |
9eefe2a2 | 907 | |
ad15749b | 908 | put_inode: |
9eefe2a2 SR |
909 | ubifs_iput(inode); |
910 | ||
911 | out: | |
912 | ubi_close_volume(c->ubi); | |
913 | return err; | |
914 | } | |
ad15749b | 915 | |
29cc5bca HG |
916 | void ubifs_close(void) |
917 | { | |
918 | } | |
919 | ||
ad15749b HG |
920 | /* Compat wrappers for common/cmd_ubifs.c */ |
921 | int ubifs_load(char *filename, u32 addr, u32 size) | |
922 | { | |
923 | loff_t actread; | |
924 | int err; | |
925 | ||
926 | printf("Loading file '%s' to addr 0x%08x...\n", filename, addr); | |
927 | ||
34cc30af | 928 | err = ubifs_read(filename, (void *)(uintptr_t)addr, 0, size, &actread); |
ad15749b | 929 | if (err == 0) { |
018f5303 | 930 | env_set_hex("filesize", actread); |
ad15749b HG |
931 | printf("Done\n"); |
932 | } | |
933 | ||
934 | return err; | |
935 | } | |
936 | ||
937 | void uboot_ubifs_umount(void) | |
938 | { | |
939 | if (ubifs_sb) { | |
940 | printf("Unmounting UBIFS volume %s!\n", | |
941 | ((struct ubifs_info *)(ubifs_sb->s_fs_info))->vi.name); | |
942 | ubifs_umount(ubifs_sb->s_fs_info); | |
943 | ubifs_sb = NULL; | |
944 | } | |
945 | } |