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Commit | Line | Data |
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6aff3115 | 1 | /* |
0aef7bc7 | 2 | * (C) Copyright 2000-2010 |
6aff3115 WD |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
4 | * | |
56086921 GL |
5 | * (C) Copyright 2008 |
6 | * Guennadi Liakhovetski, DENX Software Engineering, lg@denx.de. | |
7 | * | |
1a459660 | 8 | * SPDX-License-Identifier: GPL-2.0+ |
6aff3115 WD |
9 | */ |
10 | ||
26e355d1 JK |
11 | #define _GNU_SOURCE |
12 | ||
69bf2d2f | 13 | #include <compiler.h> |
6aff3115 | 14 | #include <errno.h> |
30fd4fad | 15 | #include <env_flags.h> |
6aff3115 | 16 | #include <fcntl.h> |
06134211 | 17 | #include <linux/stringify.h> |
10667e15 | 18 | #include <ctype.h> |
6aff3115 WD |
19 | #include <stdio.h> |
20 | #include <stdlib.h> | |
21 | #include <stddef.h> | |
22 | #include <string.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/ioctl.h> | |
25 | #include <sys/stat.h> | |
26 | #include <unistd.h> | |
6aff3115 | 27 | |
6de66b35 | 28 | #ifdef MTD_OLD |
1711f3bd | 29 | # include <stdint.h> |
6de66b35 MK |
30 | # include <linux/mtd/mtd.h> |
31 | #else | |
c83d7ca4 | 32 | # define __user /* nothing */ |
6de66b35 MK |
33 | # include <mtd/mtd-user.h> |
34 | #endif | |
35 | ||
36 | #include "fw_env.h" | |
6aff3115 | 37 | |
a8a752c0 MV |
38 | #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) |
39 | ||
56086921 GL |
40 | #define min(x, y) ({ \ |
41 | typeof(x) _min1 = (x); \ | |
42 | typeof(y) _min2 = (y); \ | |
43 | (void) (&_min1 == &_min2); \ | |
44 | _min1 < _min2 ? _min1 : _min2; }) | |
45 | ||
46 | struct envdev_s { | |
229695fe | 47 | const char *devname; /* Device name */ |
4a6fd34b WD |
48 | ulong devoff; /* Device offset */ |
49 | ulong env_size; /* environment size */ | |
50 | ulong erase_size; /* device erase size */ | |
56086921 GL |
51 | ulong env_sectors; /* number of environment sectors */ |
52 | uint8_t mtd_type; /* type of the MTD device */ | |
53 | }; | |
6aff3115 | 54 | |
56086921 GL |
55 | static struct envdev_s envdevices[2] = |
56 | { | |
57 | { | |
58 | .mtd_type = MTD_ABSENT, | |
59 | }, { | |
60 | .mtd_type = MTD_ABSENT, | |
61 | }, | |
62 | }; | |
63 | static int dev_current; | |
6aff3115 WD |
64 | |
65 | #define DEVNAME(i) envdevices[(i)].devname | |
d0fb80c3 | 66 | #define DEVOFFSET(i) envdevices[(i)].devoff |
6aff3115 WD |
67 | #define ENVSIZE(i) envdevices[(i)].env_size |
68 | #define DEVESIZE(i) envdevices[(i)].erase_size | |
56086921 GL |
69 | #define ENVSECTORS(i) envdevices[(i)].env_sectors |
70 | #define DEVTYPE(i) envdevices[(i)].mtd_type | |
6aff3115 | 71 | |
497f2053 | 72 | #define CUR_ENVSIZE ENVSIZE(dev_current) |
6aff3115 | 73 | |
d0fb80c3 | 74 | #define ENV_SIZE getenvsize() |
6aff3115 | 75 | |
56086921 GL |
76 | struct env_image_single { |
77 | uint32_t crc; /* CRC32 over data bytes */ | |
78 | char data[]; | |
79 | }; | |
6aff3115 | 80 | |
56086921 GL |
81 | struct env_image_redundant { |
82 | uint32_t crc; /* CRC32 over data bytes */ | |
83 | unsigned char flags; /* active or obsolete */ | |
84 | char data[]; | |
85 | }; | |
86 | ||
87 | enum flag_scheme { | |
88 | FLAG_NONE, | |
89 | FLAG_BOOLEAN, | |
90 | FLAG_INCREMENTAL, | |
91 | }; | |
92 | ||
93 | struct environment { | |
94 | void *image; | |
95 | uint32_t *crc; | |
96 | unsigned char *flags; | |
97 | char *data; | |
98 | enum flag_scheme flag_scheme; | |
99 | }; | |
100 | ||
101 | static struct environment environment = { | |
102 | .flag_scheme = FLAG_NONE, | |
103 | }; | |
6aff3115 | 104 | |
a8a752c0 MV |
105 | static int env_aes_cbc_crypt(char *data, const int enc); |
106 | ||
d0fb80c3 WD |
107 | static int HaveRedundEnv = 0; |
108 | ||
6de66b35 | 109 | static unsigned char active_flag = 1; |
56086921 | 110 | /* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */ |
6de66b35 | 111 | static unsigned char obsolete_flag = 0; |
d0fb80c3 | 112 | |
ddd8418f JH |
113 | #define DEFAULT_ENV_INSTANCE_STATIC |
114 | #include <env_default.h> | |
6aff3115 | 115 | |
4a6fd34b | 116 | static int flash_io (int mode); |
6de66b35 | 117 | static char *envmatch (char * s1, char * s2); |
4a6fd34b WD |
118 | static int parse_config (void); |
119 | ||
d0fb80c3 | 120 | #if defined(CONFIG_FILE) |
4a6fd34b | 121 | static int get_config (char *); |
d0fb80c3 | 122 | #endif |
4a6fd34b | 123 | static inline ulong getenvsize (void) |
d0fb80c3 | 124 | { |
ea19527c | 125 | ulong rc = CUR_ENVSIZE - sizeof(uint32_t); |
4a6fd34b | 126 | |
d0fb80c3 | 127 | if (HaveRedundEnv) |
4a6fd34b | 128 | rc -= sizeof (char); |
a8a752c0 | 129 | |
371ee137 | 130 | if (common_args.aes_flag) |
a8a752c0 MV |
131 | rc &= ~(AES_KEY_LENGTH - 1); |
132 | ||
d0fb80c3 WD |
133 | return rc; |
134 | } | |
6aff3115 | 135 | |
bd7b26f8 SB |
136 | static char *fw_string_blank(char *s, int noblank) |
137 | { | |
138 | int i; | |
139 | int len = strlen(s); | |
140 | ||
141 | for (i = 0; i < len; i++, s++) { | |
10667e15 AF |
142 | if ((noblank && !isblank(*s)) || |
143 | (!noblank && isblank(*s))) | |
9583efcc | 144 | return s; |
bd7b26f8 | 145 | } |
9583efcc | 146 | return NULL; |
bd7b26f8 SB |
147 | } |
148 | ||
6aff3115 WD |
149 | /* |
150 | * Search the environment for a variable. | |
151 | * Return the value, if found, or NULL, if not found. | |
152 | */ | |
6de66b35 | 153 | char *fw_getenv (char *name) |
6aff3115 | 154 | { |
6de66b35 | 155 | char *env, *nxt; |
6aff3115 | 156 | |
4a6fd34b | 157 | for (env = environment.data; *env; env = nxt + 1) { |
6de66b35 | 158 | char *val; |
6aff3115 | 159 | |
4a6fd34b | 160 | for (nxt = env; *nxt; ++nxt) { |
6aff3115 WD |
161 | if (nxt >= &environment.data[ENV_SIZE]) { |
162 | fprintf (stderr, "## Error: " | |
163 | "environment not terminated\n"); | |
56086921 | 164 | return NULL; |
6aff3115 WD |
165 | } |
166 | } | |
4a6fd34b | 167 | val = envmatch (name, env); |
6aff3115 WD |
168 | if (!val) |
169 | continue; | |
56086921 | 170 | return val; |
6aff3115 | 171 | } |
56086921 | 172 | return NULL; |
6aff3115 WD |
173 | } |
174 | ||
267541f7 JH |
175 | /* |
176 | * Search the default environment for a variable. | |
177 | * Return the value, if found, or NULL, if not found. | |
178 | */ | |
179 | char *fw_getdefenv(char *name) | |
180 | { | |
181 | char *env, *nxt; | |
182 | ||
183 | for (env = default_environment; *env; env = nxt + 1) { | |
184 | char *val; | |
185 | ||
186 | for (nxt = env; *nxt; ++nxt) { | |
187 | if (nxt >= &default_environment[ENV_SIZE]) { | |
188 | fprintf(stderr, "## Error: " | |
189 | "default environment not terminated\n"); | |
190 | return NULL; | |
191 | } | |
192 | } | |
193 | val = envmatch(name, env); | |
194 | if (!val) | |
195 | continue; | |
196 | return val; | |
197 | } | |
198 | return NULL; | |
199 | } | |
200 | ||
371ee137 | 201 | int parse_aes_key(char *key, uint8_t *bin_key) |
a8a752c0 MV |
202 | { |
203 | char tmp[5] = { '0', 'x', 0, 0, 0 }; | |
204 | unsigned long ul; | |
205 | int i; | |
206 | ||
207 | if (strnlen(key, 64) != 32) { | |
208 | fprintf(stderr, | |
209 | "## Error: '-a' option requires 16-byte AES key\n"); | |
210 | return -1; | |
211 | } | |
212 | ||
213 | for (i = 0; i < 16; i++) { | |
214 | tmp[2] = key[0]; | |
215 | tmp[3] = key[1]; | |
216 | errno = 0; | |
217 | ul = strtoul(tmp, NULL, 16); | |
218 | if (errno) { | |
219 | fprintf(stderr, | |
220 | "## Error: '-a' option requires valid AES key\n"); | |
221 | return -1; | |
222 | } | |
8b27abd8 | 223 | bin_key[i] = ul & 0xff; |
a8a752c0 MV |
224 | key += 2; |
225 | } | |
a8a752c0 MV |
226 | return 0; |
227 | } | |
228 | ||
6aff3115 WD |
229 | /* |
230 | * Print the current definition of one, or more, or all | |
231 | * environment variables | |
232 | */ | |
bc11756d | 233 | int fw_printenv (int argc, char *argv[]) |
6aff3115 | 234 | { |
6de66b35 | 235 | char *env, *nxt; |
371ee137 | 236 | int i, rc = 0; |
6aff3115 | 237 | |
bd7b26f8 | 238 | if (fw_env_open()) |
56086921 | 239 | return -1; |
6aff3115 | 240 | |
1ce68697 | 241 | if (argc == 0) { /* Print all env variables */ |
4a6fd34b WD |
242 | for (env = environment.data; *env; env = nxt + 1) { |
243 | for (nxt = env; *nxt; ++nxt) { | |
6aff3115 WD |
244 | if (nxt >= &environment.data[ENV_SIZE]) { |
245 | fprintf (stderr, "## Error: " | |
246 | "environment not terminated\n"); | |
56086921 | 247 | return -1; |
6aff3115 WD |
248 | } |
249 | } | |
250 | ||
4a6fd34b | 251 | printf ("%s\n", env); |
6aff3115 | 252 | } |
56086921 | 253 | return 0; |
6aff3115 WD |
254 | } |
255 | ||
1ce68697 AF |
256 | if (printenv_args.name_suppress && argc != 1) { |
257 | fprintf(stderr, | |
258 | "## Error: `-n' option requires exactly one argument\n"); | |
259 | return -1; | |
6aff3115 WD |
260 | } |
261 | ||
1ce68697 | 262 | for (i = 0; i < argc; ++i) { /* print single env variables */ |
6de66b35 MK |
263 | char *name = argv[i]; |
264 | char *val = NULL; | |
6aff3115 | 265 | |
4a6fd34b | 266 | for (env = environment.data; *env; env = nxt + 1) { |
6aff3115 | 267 | |
4a6fd34b | 268 | for (nxt = env; *nxt; ++nxt) { |
6aff3115 WD |
269 | if (nxt >= &environment.data[ENV_SIZE]) { |
270 | fprintf (stderr, "## Error: " | |
271 | "environment not terminated\n"); | |
56086921 | 272 | return -1; |
6aff3115 WD |
273 | } |
274 | } | |
4a6fd34b | 275 | val = envmatch (name, env); |
6aff3115 | 276 | if (val) { |
371ee137 | 277 | if (!printenv_args.name_suppress) { |
6aff3115 | 278 | fputs (name, stdout); |
4a6fd34b | 279 | putc ('=', stdout); |
6aff3115 | 280 | } |
4a6fd34b | 281 | puts (val); |
6aff3115 WD |
282 | break; |
283 | } | |
284 | } | |
bc11756d | 285 | if (!val) { |
4a6fd34b | 286 | fprintf (stderr, "## Error: \"%s\" not defined\n", name); |
bc11756d GE |
287 | rc = -1; |
288 | } | |
6aff3115 | 289 | } |
bc11756d | 290 | |
56086921 | 291 | return rc; |
6aff3115 WD |
292 | } |
293 | ||
bd7b26f8 | 294 | int fw_env_close(void) |
6aff3115 | 295 | { |
a8a752c0 | 296 | int ret; |
371ee137 | 297 | if (common_args.aes_flag) { |
a8a752c0 MV |
298 | ret = env_aes_cbc_crypt(environment.data, 1); |
299 | if (ret) { | |
300 | fprintf(stderr, | |
301 | "Error: can't encrypt env for flash\n"); | |
302 | return ret; | |
303 | } | |
304 | } | |
305 | ||
bd7b26f8 SB |
306 | /* |
307 | * Update CRC | |
308 | */ | |
309 | *environment.crc = crc32(0, (uint8_t *) environment.data, ENV_SIZE); | |
6aff3115 | 310 | |
bd7b26f8 SB |
311 | /* write environment back to flash */ |
312 | if (flash_io(O_RDWR)) { | |
313 | fprintf(stderr, | |
314 | "Error: can't write fw_env to flash\n"); | |
315 | return -1; | |
6aff3115 WD |
316 | } |
317 | ||
bd7b26f8 SB |
318 | return 0; |
319 | } | |
6aff3115 | 320 | |
bd7b26f8 SB |
321 | |
322 | /* | |
323 | * Set/Clear a single variable in the environment. | |
324 | * This is called in sequence to update the environment | |
325 | * in RAM without updating the copy in flash after each set | |
326 | */ | |
327 | int fw_env_write(char *name, char *value) | |
328 | { | |
329 | int len; | |
330 | char *env, *nxt; | |
331 | char *oldval = NULL; | |
267541f7 | 332 | int deleting, creating, overwriting; |
6aff3115 WD |
333 | |
334 | /* | |
335 | * search if variable with this name already exists | |
336 | */ | |
4a6fd34b WD |
337 | for (nxt = env = environment.data; *env; env = nxt + 1) { |
338 | for (nxt = env; *nxt; ++nxt) { | |
6aff3115 | 339 | if (nxt >= &environment.data[ENV_SIZE]) { |
bd7b26f8 | 340 | fprintf(stderr, "## Error: " |
6aff3115 | 341 | "environment not terminated\n"); |
56086921 GL |
342 | errno = EINVAL; |
343 | return -1; | |
6aff3115 WD |
344 | } |
345 | } | |
4a6fd34b | 346 | if ((oldval = envmatch (name, env)) != NULL) |
6aff3115 WD |
347 | break; |
348 | } | |
349 | ||
267541f7 JH |
350 | deleting = (oldval && !(value && strlen(value))); |
351 | creating = (!oldval && (value && strlen(value))); | |
352 | overwriting = (oldval && (value && strlen(value))); | |
353 | ||
354 | /* check for permission */ | |
355 | if (deleting) { | |
356 | if (env_flags_validate_varaccess(name, | |
357 | ENV_FLAGS_VARACCESS_PREVENT_DELETE)) { | |
358 | printf("Can't delete \"%s\"\n", name); | |
359 | errno = EROFS; | |
360 | return -1; | |
361 | } | |
362 | } else if (overwriting) { | |
363 | if (env_flags_validate_varaccess(name, | |
364 | ENV_FLAGS_VARACCESS_PREVENT_OVERWR)) { | |
365 | printf("Can't overwrite \"%s\"\n", name); | |
366 | errno = EROFS; | |
367 | return -1; | |
368 | } else if (env_flags_validate_varaccess(name, | |
369 | ENV_FLAGS_VARACCESS_PREVENT_NONDEF_OVERWR)) { | |
370 | const char *defval = fw_getdefenv(name); | |
371 | ||
372 | if (defval == NULL) | |
373 | defval = ""; | |
374 | if (strcmp(oldval, defval) | |
375 | != 0) { | |
376 | printf("Can't overwrite \"%s\"\n", name); | |
377 | errno = EROFS; | |
378 | return -1; | |
379 | } | |
380 | } | |
381 | } else if (creating) { | |
382 | if (env_flags_validate_varaccess(name, | |
383 | ENV_FLAGS_VARACCESS_PREVENT_CREATE)) { | |
384 | printf("Can't create \"%s\"\n", name); | |
385 | errno = EROFS; | |
386 | return -1; | |
387 | } | |
388 | } else | |
389 | /* Nothing to do */ | |
390 | return 0; | |
391 | ||
392 | if (deleting || overwriting) { | |
6aff3115 WD |
393 | if (*++nxt == '\0') { |
394 | *env = '\0'; | |
395 | } else { | |
396 | for (;;) { | |
397 | *env = *nxt++; | |
398 | if ((*env == '\0') && (*nxt == '\0')) | |
399 | break; | |
400 | ++env; | |
401 | } | |
402 | } | |
403 | *++env = '\0'; | |
404 | } | |
405 | ||
406 | /* Delete only ? */ | |
bd7b26f8 SB |
407 | if (!value || !strlen(value)) |
408 | return 0; | |
6aff3115 WD |
409 | |
410 | /* | |
411 | * Append new definition at the end | |
412 | */ | |
4a6fd34b | 413 | for (env = environment.data; *env || *(env + 1); ++env); |
6aff3115 WD |
414 | if (env > environment.data) |
415 | ++env; | |
416 | /* | |
417 | * Overflow when: | |
497f2053 | 418 | * "name" + "=" + "val" +"\0\0" > CUR_ENVSIZE - (env-environment) |
6aff3115 | 419 | */ |
4a6fd34b | 420 | len = strlen (name) + 2; |
6aff3115 | 421 | /* add '=' for first arg, ' ' for all others */ |
bd7b26f8 SB |
422 | len += strlen(value) + 1; |
423 | ||
4a6fd34b | 424 | if (len > (&environment.data[ENV_SIZE] - env)) { |
6aff3115 WD |
425 | fprintf (stderr, |
426 | "Error: environment overflow, \"%s\" deleted\n", | |
427 | name); | |
56086921 | 428 | return -1; |
6aff3115 | 429 | } |
bd7b26f8 | 430 | |
6aff3115 WD |
431 | while ((*env = *name++) != '\0') |
432 | env++; | |
bd7b26f8 SB |
433 | *env = '='; |
434 | while ((*++env = *value++) != '\0') | |
435 | ; | |
436 | ||
437 | /* end is marked with double '\0' */ | |
438 | *++env = '\0'; | |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
443 | /* | |
444 | * Deletes or sets environment variables. Returns -1 and sets errno error codes: | |
445 | * 0 - OK | |
446 | * EINVAL - need at least 1 argument | |
447 | * EROFS - certain variables ("ethaddr", "serial#") cannot be | |
448 | * modified or deleted | |
449 | * | |
450 | */ | |
451 | int fw_setenv(int argc, char *argv[]) | |
452 | { | |
371ee137 | 453 | int i; |
3779c8e3 | 454 | size_t len; |
167f5258 | 455 | char *name, **valv; |
bd7b26f8 | 456 | char *value = NULL; |
167f5258 | 457 | int valc; |
bd7b26f8 | 458 | |
1ce68697 AF |
459 | if (argc < 1) { |
460 | fprintf(stderr, "## Error: variable name missing\n"); | |
a8a752c0 MV |
461 | errno = EINVAL; |
462 | return -1; | |
463 | } | |
464 | ||
bd7b26f8 SB |
465 | if (fw_env_open()) { |
466 | fprintf(stderr, "Error: environment not initialized\n"); | |
467 | return -1; | |
468 | } | |
469 | ||
1ce68697 AF |
470 | name = argv[0]; |
471 | valv = argv + 1; | |
472 | valc = argc - 1; | |
bd7b26f8 | 473 | |
167f5258 | 474 | if (env_flags_validate_env_set_params(name, valv, valc) < 0) |
30fd4fad JH |
475 | return 1; |
476 | ||
62a34a04 | 477 | len = 0; |
167f5258 AF |
478 | for (i = 0; i < valc; ++i) { |
479 | char *val = valv[i]; | |
62a34a04 JH |
480 | size_t val_len = strlen(val); |
481 | ||
ce2f5800 JH |
482 | if (value) |
483 | value[len - 1] = ' '; | |
62a34a04 | 484 | value = realloc(value, len + val_len + 1); |
bd7b26f8 | 485 | if (!value) { |
62a34a04 | 486 | fprintf(stderr, |
8603b69b | 487 | "Cannot malloc %zu bytes: %s\n", |
62a34a04 JH |
488 | len, strerror(errno)); |
489 | return -1; | |
bd7b26f8 | 490 | } |
62a34a04 JH |
491 | |
492 | memcpy(value + len, val, val_len); | |
493 | len += val_len; | |
ce2f5800 | 494 | value[len++] = '\0'; |
6aff3115 WD |
495 | } |
496 | ||
bd7b26f8 | 497 | fw_env_write(name, value); |
6aff3115 | 498 | |
62a34a04 | 499 | free(value); |
6aff3115 | 500 | |
bd7b26f8 SB |
501 | return fw_env_close(); |
502 | } | |
6aff3115 | 503 | |
bd7b26f8 SB |
504 | /* |
505 | * Parse a file and configure the u-boot variables. | |
506 | * The script file has a very simple format, as follows: | |
507 | * | |
508 | * Each line has a couple with name, value: | |
509 | * <white spaces>variable_name<white spaces>variable_value | |
510 | * | |
511 | * Both variable_name and variable_value are interpreted as strings. | |
512 | * Any character after <white spaces> and before ending \r\n is interpreted | |
513 | * as variable's value (no comment allowed on these lines !) | |
514 | * | |
515 | * Comments are allowed if the first character in the line is # | |
516 | * | |
517 | * Returns -1 and sets errno error codes: | |
518 | * 0 - OK | |
519 | * -1 - Error | |
520 | */ | |
521 | int fw_parse_script(char *fname) | |
522 | { | |
523 | FILE *fp; | |
524 | char dump[1024]; /* Maximum line length in the file */ | |
525 | char *name; | |
526 | char *val; | |
527 | int lineno = 0; | |
528 | int len; | |
529 | int ret = 0; | |
530 | ||
531 | if (fw_env_open()) { | |
532 | fprintf(stderr, "Error: environment not initialized\n"); | |
56086921 | 533 | return -1; |
6aff3115 WD |
534 | } |
535 | ||
bd7b26f8 SB |
536 | if (strcmp(fname, "-") == 0) |
537 | fp = stdin; | |
538 | else { | |
539 | fp = fopen(fname, "r"); | |
540 | if (fp == NULL) { | |
541 | fprintf(stderr, "I cannot open %s for reading\n", | |
542 | fname); | |
543 | return -1; | |
544 | } | |
545 | } | |
546 | ||
547 | while (fgets(dump, sizeof(dump), fp)) { | |
548 | lineno++; | |
549 | len = strlen(dump); | |
550 | ||
551 | /* | |
552 | * Read a whole line from the file. If the line is too long | |
553 | * or is not terminated, reports an error and exit. | |
554 | */ | |
555 | if (dump[len - 1] != '\n') { | |
556 | fprintf(stderr, | |
557 | "Line %d not corrected terminated or too long\n", | |
558 | lineno); | |
559 | ret = -1; | |
560 | break; | |
561 | } | |
562 | ||
563 | /* Drop ending line feed / carriage return */ | |
564 | while (len > 0 && (dump[len - 1] == '\n' || | |
565 | dump[len - 1] == '\r')) { | |
566 | dump[len - 1] = '\0'; | |
567 | len--; | |
568 | } | |
569 | ||
570 | /* Skip comment or empty lines */ | |
571 | if ((len == 0) || dump[0] == '#') | |
572 | continue; | |
573 | ||
574 | /* | |
575 | * Search for variable's name, | |
576 | * remove leading whitespaces | |
577 | */ | |
578 | name = fw_string_blank(dump, 1); | |
579 | if (!name) | |
580 | continue; | |
581 | ||
582 | /* The first white space is the end of variable name */ | |
583 | val = fw_string_blank(name, 0); | |
584 | len = strlen(name); | |
585 | if (val) { | |
586 | *val++ = '\0'; | |
587 | if ((val - name) < len) | |
588 | val = fw_string_blank(val, 1); | |
589 | else | |
590 | val = NULL; | |
591 | } | |
592 | ||
593 | #ifdef DEBUG | |
594 | fprintf(stderr, "Setting %s : %s\n", | |
595 | name, val ? val : " removed"); | |
596 | #endif | |
597 | ||
30fd4fad JH |
598 | if (env_flags_validate_type(name, val) < 0) { |
599 | ret = -1; | |
600 | break; | |
601 | } | |
602 | ||
bd7b26f8 SB |
603 | /* |
604 | * If there is an error setting a variable, | |
605 | * try to save the environment and returns an error | |
606 | */ | |
607 | if (fw_env_write(name, val)) { | |
608 | fprintf(stderr, | |
609 | "fw_env_write returns with error : %s\n", | |
610 | strerror(errno)); | |
611 | ret = -1; | |
612 | break; | |
613 | } | |
614 | ||
615 | } | |
616 | ||
617 | /* Close file if not stdin */ | |
618 | if (strcmp(fname, "-") != 0) | |
619 | fclose(fp); | |
620 | ||
621 | ret |= fw_env_close(); | |
622 | ||
623 | return ret; | |
624 | ||
6aff3115 WD |
625 | } |
626 | ||
56086921 GL |
627 | /* |
628 | * Test for bad block on NAND, just returns 0 on NOR, on NAND: | |
629 | * 0 - block is good | |
630 | * > 0 - block is bad | |
631 | * < 0 - failed to test | |
632 | */ | |
633 | static int flash_bad_block (int fd, uint8_t mtd_type, loff_t *blockstart) | |
6aff3115 | 634 | { |
56086921 GL |
635 | if (mtd_type == MTD_NANDFLASH) { |
636 | int badblock = ioctl (fd, MEMGETBADBLOCK, blockstart); | |
6aff3115 | 637 | |
56086921 GL |
638 | if (badblock < 0) { |
639 | perror ("Cannot read bad block mark"); | |
640 | return badblock; | |
641 | } | |
642 | ||
643 | if (badblock) { | |
644 | #ifdef DEBUG | |
645 | fprintf (stderr, "Bad block at 0x%llx, " | |
646 | "skipping\n", *blockstart); | |
647 | #endif | |
648 | return badblock; | |
649 | } | |
6aff3115 WD |
650 | } |
651 | ||
56086921 GL |
652 | return 0; |
653 | } | |
654 | ||
655 | /* | |
656 | * Read data from flash at an offset into a provided buffer. On NAND it skips | |
657 | * bad blocks but makes sure it stays within ENVSECTORS (dev) starting from | |
658 | * the DEVOFFSET (dev) block. On NOR the loop is only run once. | |
659 | */ | |
660 | static int flash_read_buf (int dev, int fd, void *buf, size_t count, | |
661 | off_t offset, uint8_t mtd_type) | |
662 | { | |
663 | size_t blocklen; /* erase / write length - one block on NAND, | |
664 | 0 on NOR */ | |
665 | size_t processed = 0; /* progress counter */ | |
666 | size_t readlen = count; /* current read length */ | |
667 | off_t top_of_range; /* end of the last block we may use */ | |
668 | off_t block_seek; /* offset inside the current block to the start | |
669 | of the data */ | |
670 | loff_t blockstart; /* running start of the current block - | |
671 | MEMGETBADBLOCK needs 64 bits */ | |
672 | int rc; | |
673 | ||
9eeaa8e6 | 674 | blockstart = (offset / DEVESIZE (dev)) * DEVESIZE (dev); |
56086921 GL |
675 | |
676 | /* Offset inside a block */ | |
677 | block_seek = offset - blockstart; | |
678 | ||
679 | if (mtd_type == MTD_NANDFLASH) { | |
680 | /* | |
681 | * NAND: calculate which blocks we are reading. We have | |
682 | * to read one block at a time to skip bad blocks. | |
683 | */ | |
684 | blocklen = DEVESIZE (dev); | |
685 | ||
686 | /* | |
687 | * To calculate the top of the range, we have to use the | |
688 | * global DEVOFFSET (dev), which can be different from offset | |
689 | */ | |
9eeaa8e6 RB |
690 | top_of_range = ((DEVOFFSET(dev) / blocklen) + |
691 | ENVSECTORS (dev)) * blocklen; | |
56086921 GL |
692 | |
693 | /* Limit to one block for the first read */ | |
694 | if (readlen > blocklen - block_seek) | |
695 | readlen = blocklen - block_seek; | |
696 | } else { | |
697 | blocklen = 0; | |
698 | top_of_range = offset + count; | |
d0fb80c3 | 699 | } |
6aff3115 | 700 | |
56086921 GL |
701 | /* This only runs once on NOR flash */ |
702 | while (processed < count) { | |
703 | rc = flash_bad_block (fd, mtd_type, &blockstart); | |
704 | if (rc < 0) /* block test failed */ | |
705 | return -1; | |
6aff3115 | 706 | |
56086921 GL |
707 | if (blockstart + block_seek + readlen > top_of_range) { |
708 | /* End of range is reached */ | |
709 | fprintf (stderr, | |
710 | "Too few good blocks within range\n"); | |
711 | return -1; | |
d0fb80c3 WD |
712 | } |
713 | ||
56086921 GL |
714 | if (rc) { /* block is bad */ |
715 | blockstart += blocklen; | |
716 | continue; | |
6aff3115 WD |
717 | } |
718 | ||
56086921 GL |
719 | /* |
720 | * If a block is bad, we retry in the next block at the same | |
721 | * offset - see common/env_nand.c::writeenv() | |
722 | */ | |
723 | lseek (fd, blockstart + block_seek, SEEK_SET); | |
6aff3115 | 724 | |
56086921 GL |
725 | rc = read (fd, buf + processed, readlen); |
726 | if (rc != readlen) { | |
727 | fprintf (stderr, "Read error on %s: %s\n", | |
728 | DEVNAME (dev), strerror (errno)); | |
729 | return -1; | |
6aff3115 | 730 | } |
56086921 | 731 | #ifdef DEBUG |
74620e1c JH |
732 | fprintf(stderr, "Read 0x%x bytes at 0x%llx on %s\n", |
733 | rc, blockstart + block_seek, DEVNAME(dev)); | |
56086921 GL |
734 | #endif |
735 | processed += readlen; | |
736 | readlen = min (blocklen, count - processed); | |
737 | block_seek = 0; | |
738 | blockstart += blocklen; | |
739 | } | |
740 | ||
741 | return processed; | |
742 | } | |
743 | ||
744 | /* | |
9eeaa8e6 RB |
745 | * Write count bytes at offset, but stay within ENVSECTORS (dev) sectors of |
746 | * DEVOFFSET (dev). Similar to the read case above, on NOR and dataflash we | |
747 | * erase and write the whole data at once. | |
56086921 GL |
748 | */ |
749 | static int flash_write_buf (int dev, int fd, void *buf, size_t count, | |
750 | off_t offset, uint8_t mtd_type) | |
751 | { | |
752 | void *data; | |
753 | struct erase_info_user erase; | |
754 | size_t blocklen; /* length of NAND block / NOR erase sector */ | |
755 | size_t erase_len; /* whole area that can be erased - may include | |
756 | bad blocks */ | |
757 | size_t erasesize; /* erase / write length - one block on NAND, | |
758 | whole area on NOR */ | |
759 | size_t processed = 0; /* progress counter */ | |
9eeaa8e6 | 760 | size_t write_total; /* total size to actually write - excluding |
56086921 GL |
761 | bad blocks */ |
762 | off_t erase_offset; /* offset to the first erase block (aligned) | |
763 | below offset */ | |
764 | off_t block_seek; /* offset inside the erase block to the start | |
765 | of the data */ | |
766 | off_t top_of_range; /* end of the last block we may use */ | |
767 | loff_t blockstart; /* running start of the current block - | |
768 | MEMGETBADBLOCK needs 64 bits */ | |
769 | int rc; | |
770 | ||
e387efbd OM |
771 | /* |
772 | * For mtd devices only offset and size of the environment do matter | |
773 | */ | |
774 | if (mtd_type == MTD_ABSENT) { | |
775 | blocklen = count; | |
776 | top_of_range = offset + count; | |
777 | erase_len = blocklen; | |
778 | blockstart = offset; | |
779 | block_seek = 0; | |
780 | write_total = blocklen; | |
781 | } else { | |
782 | blocklen = DEVESIZE(dev); | |
56086921 | 783 | |
e387efbd OM |
784 | top_of_range = ((DEVOFFSET(dev) / blocklen) + |
785 | ENVSECTORS(dev)) * blocklen; | |
6aff3115 | 786 | |
e387efbd | 787 | erase_offset = (offset / blocklen) * blocklen; |
6aff3115 | 788 | |
e387efbd OM |
789 | /* Maximum area we may use */ |
790 | erase_len = top_of_range - erase_offset; | |
56086921 | 791 | |
e387efbd OM |
792 | blockstart = erase_offset; |
793 | /* Offset inside a block */ | |
794 | block_seek = offset - erase_offset; | |
56086921 | 795 | |
e387efbd OM |
796 | /* |
797 | * Data size we actually write: from the start of the block | |
798 | * to the start of the data, then count bytes of data, and | |
799 | * to the end of the block | |
800 | */ | |
801 | write_total = ((block_seek + count + blocklen - 1) / | |
802 | blocklen) * blocklen; | |
803 | } | |
56086921 GL |
804 | |
805 | /* | |
806 | * Support data anywhere within erase sectors: read out the complete | |
807 | * area to be erased, replace the environment image, write the whole | |
808 | * block back again. | |
809 | */ | |
810 | if (write_total > count) { | |
811 | data = malloc (erase_len); | |
812 | if (!data) { | |
d0fb80c3 | 813 | fprintf (stderr, |
8603b69b | 814 | "Cannot malloc %zu bytes: %s\n", |
56086921 GL |
815 | erase_len, strerror (errno)); |
816 | return -1; | |
d0fb80c3 | 817 | } |
56086921 GL |
818 | |
819 | rc = flash_read_buf (dev, fd, data, write_total, erase_offset, | |
820 | mtd_type); | |
821 | if (write_total != rc) | |
822 | return -1; | |
823 | ||
74620e1c JH |
824 | #ifdef DEBUG |
825 | fprintf(stderr, "Preserving data "); | |
826 | if (block_seek != 0) | |
827 | fprintf(stderr, "0x%x - 0x%lx", 0, block_seek - 1); | |
828 | if (block_seek + count != write_total) { | |
829 | if (block_seek != 0) | |
830 | fprintf(stderr, " and "); | |
831 | fprintf(stderr, "0x%lx - 0x%x", | |
832 | block_seek + count, write_total - 1); | |
833 | } | |
834 | fprintf(stderr, "\n"); | |
835 | #endif | |
56086921 GL |
836 | /* Overwrite the old environment */ |
837 | memcpy (data + block_seek, buf, count); | |
838 | } else { | |
839 | /* | |
840 | * We get here, iff offset is block-aligned and count is a | |
841 | * multiple of blocklen - see write_total calculation above | |
842 | */ | |
843 | data = buf; | |
844 | } | |
845 | ||
846 | if (mtd_type == MTD_NANDFLASH) { | |
847 | /* | |
848 | * NAND: calculate which blocks we are writing. We have | |
849 | * to write one block at a time to skip bad blocks. | |
850 | */ | |
851 | erasesize = blocklen; | |
852 | } else { | |
853 | erasesize = erase_len; | |
854 | } | |
855 | ||
856 | erase.length = erasesize; | |
857 | ||
9eeaa8e6 | 858 | /* This only runs once on NOR flash and SPI-dataflash */ |
56086921 GL |
859 | while (processed < write_total) { |
860 | rc = flash_bad_block (fd, mtd_type, &blockstart); | |
861 | if (rc < 0) /* block test failed */ | |
862 | return rc; | |
863 | ||
864 | if (blockstart + erasesize > top_of_range) { | |
865 | fprintf (stderr, "End of range reached, aborting\n"); | |
866 | return -1; | |
6aff3115 | 867 | } |
56086921 GL |
868 | |
869 | if (rc) { /* block is bad */ | |
870 | blockstart += blocklen; | |
871 | continue; | |
872 | } | |
873 | ||
e387efbd OM |
874 | if (mtd_type != MTD_ABSENT) { |
875 | erase.start = blockstart; | |
876 | ioctl(fd, MEMUNLOCK, &erase); | |
877 | /* These do not need an explicit erase cycle */ | |
878 | if (mtd_type != MTD_DATAFLASH) | |
879 | if (ioctl(fd, MEMERASE, &erase) != 0) { | |
880 | fprintf(stderr, | |
881 | "MTD erase error on %s: %s\n", | |
882 | DEVNAME(dev), strerror(errno)); | |
883 | return -1; | |
884 | } | |
885 | } | |
56086921 GL |
886 | |
887 | if (lseek (fd, blockstart, SEEK_SET) == -1) { | |
6aff3115 | 888 | fprintf (stderr, |
56086921 GL |
889 | "Seek error on %s: %s\n", |
890 | DEVNAME (dev), strerror (errno)); | |
891 | return -1; | |
6aff3115 | 892 | } |
56086921 GL |
893 | |
894 | #ifdef DEBUG | |
74620e1c JH |
895 | fprintf(stderr, "Write 0x%x bytes at 0x%llx\n", erasesize, |
896 | blockstart); | |
56086921 GL |
897 | #endif |
898 | if (write (fd, data + processed, erasesize) != erasesize) { | |
899 | fprintf (stderr, "Write error on %s: %s\n", | |
900 | DEVNAME (dev), strerror (errno)); | |
901 | return -1; | |
6aff3115 | 902 | } |
56086921 | 903 | |
e387efbd OM |
904 | if (mtd_type != MTD_ABSENT) |
905 | ioctl(fd, MEMLOCK, &erase); | |
56086921 | 906 | |
4b774ff1 | 907 | processed += erasesize; |
56086921 | 908 | block_seek = 0; |
4b774ff1 | 909 | blockstart += erasesize; |
56086921 GL |
910 | } |
911 | ||
912 | if (write_total > count) | |
913 | free (data); | |
914 | ||
915 | return processed; | |
916 | } | |
917 | ||
918 | /* | |
919 | * Set obsolete flag at offset - NOR flash only | |
920 | */ | |
921 | static int flash_flag_obsolete (int dev, int fd, off_t offset) | |
922 | { | |
923 | int rc; | |
0aef7bc7 | 924 | struct erase_info_user erase; |
56086921 | 925 | |
0aef7bc7 DZ |
926 | erase.start = DEVOFFSET (dev); |
927 | erase.length = DEVESIZE (dev); | |
56086921 GL |
928 | /* This relies on the fact, that obsolete_flag == 0 */ |
929 | rc = lseek (fd, offset, SEEK_SET); | |
930 | if (rc < 0) { | |
931 | fprintf (stderr, "Cannot seek to set the flag on %s \n", | |
932 | DEVNAME (dev)); | |
933 | return rc; | |
934 | } | |
0aef7bc7 | 935 | ioctl (fd, MEMUNLOCK, &erase); |
56086921 | 936 | rc = write (fd, &obsolete_flag, sizeof (obsolete_flag)); |
0aef7bc7 | 937 | ioctl (fd, MEMLOCK, &erase); |
56086921 GL |
938 | if (rc < 0) |
939 | perror ("Could not set obsolete flag"); | |
940 | ||
941 | return rc; | |
942 | } | |
943 | ||
a8a752c0 MV |
944 | /* Encrypt or decrypt the environment before writing or reading it. */ |
945 | static int env_aes_cbc_crypt(char *payload, const int enc) | |
946 | { | |
947 | uint8_t *data = (uint8_t *)payload; | |
948 | const int len = getenvsize(); | |
949 | uint8_t key_exp[AES_EXPAND_KEY_LENGTH]; | |
950 | uint32_t aes_blocks; | |
951 | ||
952 | /* First we expand the key. */ | |
371ee137 | 953 | aes_expand_key(common_args.aes_key, key_exp); |
a8a752c0 MV |
954 | |
955 | /* Calculate the number of AES blocks to encrypt. */ | |
956 | aes_blocks = DIV_ROUND_UP(len, AES_KEY_LENGTH); | |
957 | ||
958 | if (enc) | |
959 | aes_cbc_encrypt_blocks(key_exp, data, data, aes_blocks); | |
960 | else | |
961 | aes_cbc_decrypt_blocks(key_exp, data, data, aes_blocks); | |
962 | ||
963 | return 0; | |
964 | } | |
965 | ||
56086921 GL |
966 | static int flash_write (int fd_current, int fd_target, int dev_target) |
967 | { | |
968 | int rc; | |
969 | ||
970 | switch (environment.flag_scheme) { | |
971 | case FLAG_NONE: | |
972 | break; | |
973 | case FLAG_INCREMENTAL: | |
974 | (*environment.flags)++; | |
975 | break; | |
976 | case FLAG_BOOLEAN: | |
977 | *environment.flags = active_flag; | |
978 | break; | |
979 | default: | |
980 | fprintf (stderr, "Unimplemented flash scheme %u \n", | |
981 | environment.flag_scheme); | |
982 | return -1; | |
983 | } | |
984 | ||
985 | #ifdef DEBUG | |
74620e1c | 986 | fprintf(stderr, "Writing new environment at 0x%lx on %s\n", |
56086921 GL |
987 | DEVOFFSET (dev_target), DEVNAME (dev_target)); |
988 | #endif | |
a8a752c0 | 989 | |
497f2053 JH |
990 | rc = flash_write_buf(dev_target, fd_target, environment.image, |
991 | CUR_ENVSIZE, DEVOFFSET(dev_target), | |
56086921 GL |
992 | DEVTYPE(dev_target)); |
993 | if (rc < 0) | |
994 | return rc; | |
995 | ||
996 | if (environment.flag_scheme == FLAG_BOOLEAN) { | |
997 | /* Have to set obsolete flag */ | |
998 | off_t offset = DEVOFFSET (dev_current) + | |
999 | offsetof (struct env_image_redundant, flags); | |
1000 | #ifdef DEBUG | |
74620e1c JH |
1001 | fprintf(stderr, |
1002 | "Setting obsolete flag in environment at 0x%lx on %s\n", | |
56086921 GL |
1003 | DEVOFFSET (dev_current), DEVNAME (dev_current)); |
1004 | #endif | |
1005 | flash_flag_obsolete (dev_current, fd_current, offset); | |
1006 | } | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | static int flash_read (int fd) | |
1012 | { | |
1013 | struct mtd_info_user mtdinfo; | |
f1932b78 | 1014 | struct stat st; |
56086921 GL |
1015 | int rc; |
1016 | ||
f1932b78 | 1017 | rc = fstat(fd, &st); |
56086921 | 1018 | if (rc < 0) { |
f1932b78 LR |
1019 | fprintf(stderr, "Cannot stat the file %s\n", |
1020 | DEVNAME(dev_current)); | |
56086921 GL |
1021 | return -1; |
1022 | } | |
1023 | ||
f1932b78 LR |
1024 | if (S_ISCHR(st.st_mode)) { |
1025 | rc = ioctl(fd, MEMGETINFO, &mtdinfo); | |
1026 | if (rc < 0) { | |
1027 | fprintf(stderr, "Cannot get MTD information for %s\n", | |
1028 | DEVNAME(dev_current)); | |
1029 | return -1; | |
1030 | } | |
1031 | if (mtdinfo.type != MTD_NORFLASH && | |
1032 | mtdinfo.type != MTD_NANDFLASH && | |
2b74433f JH |
1033 | mtdinfo.type != MTD_DATAFLASH && |
1034 | mtdinfo.type != MTD_UBIVOLUME) { | |
f1932b78 LR |
1035 | fprintf (stderr, "Unsupported flash type %u on %s\n", |
1036 | mtdinfo.type, DEVNAME(dev_current)); | |
1037 | return -1; | |
1038 | } | |
1039 | } else { | |
1040 | memset(&mtdinfo, 0, sizeof(mtdinfo)); | |
1041 | mtdinfo.type = MTD_ABSENT; | |
56086921 GL |
1042 | } |
1043 | ||
1044 | DEVTYPE(dev_current) = mtdinfo.type; | |
1045 | ||
497f2053 | 1046 | rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE, |
56086921 | 1047 | DEVOFFSET (dev_current), mtdinfo.type); |
a8a752c0 MV |
1048 | if (rc != CUR_ENVSIZE) |
1049 | return -1; | |
56086921 | 1050 | |
a8a752c0 | 1051 | return 0; |
56086921 GL |
1052 | } |
1053 | ||
1054 | static int flash_io (int mode) | |
1055 | { | |
1056 | int fd_current, fd_target, rc, dev_target; | |
1057 | ||
1058 | /* dev_current: fd_current, erase_current */ | |
1059 | fd_current = open (DEVNAME (dev_current), mode); | |
1060 | if (fd_current < 0) { | |
1061 | fprintf (stderr, | |
1062 | "Can't open %s: %s\n", | |
1063 | DEVNAME (dev_current), strerror (errno)); | |
1064 | return -1; | |
1065 | } | |
1066 | ||
1067 | if (mode == O_RDWR) { | |
d0fb80c3 | 1068 | if (HaveRedundEnv) { |
56086921 GL |
1069 | /* switch to next partition for writing */ |
1070 | dev_target = !dev_current; | |
1071 | /* dev_target: fd_target, erase_target */ | |
1072 | fd_target = open (DEVNAME (dev_target), mode); | |
1073 | if (fd_target < 0) { | |
d0fb80c3 | 1074 | fprintf (stderr, |
56086921 GL |
1075 | "Can't open %s: %s\n", |
1076 | DEVNAME (dev_target), | |
1077 | strerror (errno)); | |
1078 | rc = -1; | |
1079 | goto exit; | |
d0fb80c3 | 1080 | } |
56086921 GL |
1081 | } else { |
1082 | dev_target = dev_current; | |
1083 | fd_target = fd_current; | |
6aff3115 | 1084 | } |
56086921 GL |
1085 | |
1086 | rc = flash_write (fd_current, fd_target, dev_target); | |
1087 | ||
d0fb80c3 | 1088 | if (HaveRedundEnv) { |
56086921 | 1089 | if (close (fd_target)) { |
d0fb80c3 | 1090 | fprintf (stderr, |
4a6fd34b | 1091 | "I/O error on %s: %s\n", |
56086921 | 1092 | DEVNAME (dev_target), |
4a6fd34b | 1093 | strerror (errno)); |
56086921 | 1094 | rc = -1; |
d0fb80c3 | 1095 | } |
6aff3115 | 1096 | } |
6aff3115 | 1097 | } else { |
56086921 | 1098 | rc = flash_read (fd_current); |
6aff3115 WD |
1099 | } |
1100 | ||
56086921 GL |
1101 | exit: |
1102 | if (close (fd_current)) { | |
6aff3115 | 1103 | fprintf (stderr, |
56086921 GL |
1104 | "I/O error on %s: %s\n", |
1105 | DEVNAME (dev_current), strerror (errno)); | |
1106 | return -1; | |
6aff3115 WD |
1107 | } |
1108 | ||
56086921 | 1109 | return rc; |
6aff3115 WD |
1110 | } |
1111 | ||
1112 | /* | |
1113 | * s1 is either a simple 'name', or a 'name=value' pair. | |
1114 | * s2 is a 'name=value' pair. | |
1115 | * If the names match, return the value of s2, else NULL. | |
1116 | */ | |
1117 | ||
6de66b35 | 1118 | static char *envmatch (char * s1, char * s2) |
6aff3115 | 1119 | { |
586197df JH |
1120 | if (s1 == NULL || s2 == NULL) |
1121 | return NULL; | |
6aff3115 WD |
1122 | |
1123 | while (*s1 == *s2++) | |
1124 | if (*s1++ == '=') | |
56086921 | 1125 | return s2; |
4a6fd34b | 1126 | if (*s1 == '\0' && *(s2 - 1) == '=') |
56086921 GL |
1127 | return s2; |
1128 | return NULL; | |
6aff3115 WD |
1129 | } |
1130 | ||
1131 | /* | |
1132 | * Prevent confusion if running from erased flash memory | |
1133 | */ | |
bd7b26f8 | 1134 | int fw_env_open(void) |
6aff3115 | 1135 | { |
56086921 | 1136 | int crc0, crc0_ok; |
735eb0f0 | 1137 | unsigned char flag0; |
56086921 GL |
1138 | void *addr0; |
1139 | ||
6aff3115 | 1140 | int crc1, crc1_ok; |
735eb0f0 | 1141 | unsigned char flag1; |
56086921 | 1142 | void *addr1; |
d0fb80c3 | 1143 | |
a8a752c0 MV |
1144 | int ret; |
1145 | ||
56086921 GL |
1146 | struct env_image_single *single; |
1147 | struct env_image_redundant *redundant; | |
6aff3115 | 1148 | |
4a6fd34b | 1149 | if (parse_config ()) /* should fill envdevices */ |
56086921 | 1150 | return -1; |
4a6fd34b | 1151 | |
497f2053 | 1152 | addr0 = calloc(1, CUR_ENVSIZE); |
56086921 | 1153 | if (addr0 == NULL) { |
497f2053 | 1154 | fprintf(stderr, |
4a6fd34b | 1155 | "Not enough memory for environment (%ld bytes)\n", |
497f2053 | 1156 | CUR_ENVSIZE); |
56086921 | 1157 | return -1; |
d0fb80c3 | 1158 | } |
4a6fd34b | 1159 | |
d0fb80c3 | 1160 | /* read environment from FLASH to local buffer */ |
56086921 GL |
1161 | environment.image = addr0; |
1162 | ||
1163 | if (HaveRedundEnv) { | |
1164 | redundant = addr0; | |
1165 | environment.crc = &redundant->crc; | |
1166 | environment.flags = &redundant->flags; | |
1167 | environment.data = redundant->data; | |
1168 | } else { | |
1169 | single = addr0; | |
1170 | environment.crc = &single->crc; | |
1171 | environment.flags = NULL; | |
1172 | environment.data = single->data; | |
d0fb80c3 | 1173 | } |
4a6fd34b | 1174 | |
56086921 GL |
1175 | dev_current = 0; |
1176 | if (flash_io (O_RDONLY)) | |
1177 | return -1; | |
1178 | ||
1179 | crc0 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE); | |
a8a752c0 | 1180 | |
371ee137 | 1181 | if (common_args.aes_flag) { |
a8a752c0 MV |
1182 | ret = env_aes_cbc_crypt(environment.data, 0); |
1183 | if (ret) | |
1184 | return ret; | |
1185 | } | |
1186 | ||
56086921 | 1187 | crc0_ok = (crc0 == *environment.crc); |
d0fb80c3 | 1188 | if (!HaveRedundEnv) { |
56086921 | 1189 | if (!crc0_ok) { |
4a6fd34b WD |
1190 | fprintf (stderr, |
1191 | "Warning: Bad CRC, using default environment\n"); | |
f07217c9 | 1192 | memcpy(environment.data, default_environment, sizeof default_environment); |
6aff3115 | 1193 | } |
d0fb80c3 | 1194 | } else { |
56086921 | 1195 | flag0 = *environment.flags; |
4a6fd34b | 1196 | |
56086921 | 1197 | dev_current = 1; |
497f2053 | 1198 | addr1 = calloc(1, CUR_ENVSIZE); |
56086921 | 1199 | if (addr1 == NULL) { |
497f2053 | 1200 | fprintf(stderr, |
4a6fd34b | 1201 | "Not enough memory for environment (%ld bytes)\n", |
497f2053 | 1202 | CUR_ENVSIZE); |
56086921 | 1203 | return -1; |
4a6fd34b | 1204 | } |
56086921 | 1205 | redundant = addr1; |
4a6fd34b | 1206 | |
56086921 GL |
1207 | /* |
1208 | * have to set environment.image for flash_read(), careful - | |
1209 | * other pointers in environment still point inside addr0 | |
1210 | */ | |
1211 | environment.image = addr1; | |
1212 | if (flash_io (O_RDONLY)) | |
1213 | return -1; | |
1214 | ||
1215 | /* Check flag scheme compatibility */ | |
1216 | if (DEVTYPE(dev_current) == MTD_NORFLASH && | |
1217 | DEVTYPE(!dev_current) == MTD_NORFLASH) { | |
1218 | environment.flag_scheme = FLAG_BOOLEAN; | |
1219 | } else if (DEVTYPE(dev_current) == MTD_NANDFLASH && | |
1220 | DEVTYPE(!dev_current) == MTD_NANDFLASH) { | |
1221 | environment.flag_scheme = FLAG_INCREMENTAL; | |
9eeaa8e6 RB |
1222 | } else if (DEVTYPE(dev_current) == MTD_DATAFLASH && |
1223 | DEVTYPE(!dev_current) == MTD_DATAFLASH) { | |
1224 | environment.flag_scheme = FLAG_BOOLEAN; | |
785881f7 JH |
1225 | } else if (DEVTYPE(dev_current) == MTD_UBIVOLUME && |
1226 | DEVTYPE(!dev_current) == MTD_UBIVOLUME) { | |
1227 | environment.flag_scheme = FLAG_INCREMENTAL; | |
23ef62d7 OM |
1228 | } else if (DEVTYPE(dev_current) == MTD_ABSENT && |
1229 | DEVTYPE(!dev_current) == MTD_ABSENT) { | |
1230 | environment.flag_scheme = FLAG_INCREMENTAL; | |
56086921 GL |
1231 | } else { |
1232 | fprintf (stderr, "Incompatible flash types!\n"); | |
1233 | return -1; | |
6aff3115 | 1234 | } |
4a6fd34b | 1235 | |
56086921 | 1236 | crc1 = crc32 (0, (uint8_t *) redundant->data, ENV_SIZE); |
a8a752c0 | 1237 | |
371ee137 | 1238 | if (common_args.aes_flag) { |
a8a752c0 MV |
1239 | ret = env_aes_cbc_crypt(redundant->data, 0); |
1240 | if (ret) | |
1241 | return ret; | |
1242 | } | |
1243 | ||
56086921 GL |
1244 | crc1_ok = (crc1 == redundant->crc); |
1245 | flag1 = redundant->flags; | |
1246 | ||
1247 | if (crc0_ok && !crc1_ok) { | |
1248 | dev_current = 0; | |
1249 | } else if (!crc0_ok && crc1_ok) { | |
1250 | dev_current = 1; | |
1251 | } else if (!crc0_ok && !crc1_ok) { | |
4a6fd34b WD |
1252 | fprintf (stderr, |
1253 | "Warning: Bad CRC, using default environment\n"); | |
56086921 GL |
1254 | memcpy (environment.data, default_environment, |
1255 | sizeof default_environment); | |
1256 | dev_current = 0; | |
1257 | } else { | |
1258 | switch (environment.flag_scheme) { | |
1259 | case FLAG_BOOLEAN: | |
1260 | if (flag0 == active_flag && | |
1261 | flag1 == obsolete_flag) { | |
1262 | dev_current = 0; | |
1263 | } else if (flag0 == obsolete_flag && | |
1264 | flag1 == active_flag) { | |
1265 | dev_current = 1; | |
1266 | } else if (flag0 == flag1) { | |
1267 | dev_current = 0; | |
1268 | } else if (flag0 == 0xFF) { | |
1269 | dev_current = 0; | |
1270 | } else if (flag1 == 0xFF) { | |
1271 | dev_current = 1; | |
1272 | } else { | |
1273 | dev_current = 0; | |
1274 | } | |
1275 | break; | |
1276 | case FLAG_INCREMENTAL: | |
735eb0f0 | 1277 | if (flag0 == 255 && flag1 == 0) |
56086921 GL |
1278 | dev_current = 1; |
1279 | else if ((flag1 == 255 && flag0 == 0) || | |
735eb0f0 | 1280 | flag0 >= flag1) |
56086921 | 1281 | dev_current = 0; |
735eb0f0 JP |
1282 | else /* flag1 > flag0 */ |
1283 | dev_current = 1; | |
56086921 GL |
1284 | break; |
1285 | default: | |
1286 | fprintf (stderr, "Unknown flag scheme %u \n", | |
1287 | environment.flag_scheme); | |
1288 | return -1; | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * If we are reading, we don't need the flag and the CRC any | |
1294 | * more, if we are writing, we will re-calculate CRC and update | |
1295 | * flags before writing out | |
1296 | */ | |
1297 | if (dev_current) { | |
1298 | environment.image = addr1; | |
1299 | environment.crc = &redundant->crc; | |
1300 | environment.flags = &redundant->flags; | |
1301 | environment.data = redundant->data; | |
1302 | free (addr0); | |
1303 | } else { | |
1304 | environment.image = addr0; | |
1305 | /* Other pointers are already set */ | |
4a6fd34b | 1306 | free (addr1); |
6aff3115 | 1307 | } |
74620e1c JH |
1308 | #ifdef DEBUG |
1309 | fprintf(stderr, "Selected env in %s\n", DEVNAME(dev_current)); | |
1310 | #endif | |
6aff3115 | 1311 | } |
56086921 | 1312 | return 0; |
6aff3115 WD |
1313 | } |
1314 | ||
1315 | ||
4a6fd34b | 1316 | static int parse_config () |
6aff3115 WD |
1317 | { |
1318 | struct stat st; | |
1319 | ||
d0fb80c3 WD |
1320 | #if defined(CONFIG_FILE) |
1321 | /* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */ | |
371ee137 AF |
1322 | if (get_config(common_args.config_file)) { |
1323 | fprintf(stderr, "Cannot parse config file '%s': %m\n", | |
1324 | common_args.config_file); | |
56086921 | 1325 | return -1; |
6aff3115 | 1326 | } |
d0fb80c3 | 1327 | #else |
229695fe | 1328 | DEVNAME (0) = DEVICE1_NAME; |
4a6fd34b WD |
1329 | DEVOFFSET (0) = DEVICE1_OFFSET; |
1330 | ENVSIZE (0) = ENV1_SIZE; | |
23869bf8 | 1331 | /* Default values are: erase-size=env-size */ |
9eeaa8e6 | 1332 | DEVESIZE (0) = ENVSIZE (0); |
23869bf8 DB |
1333 | /* #sectors=env-size/erase-size (rounded up) */ |
1334 | ENVSECTORS (0) = (ENVSIZE(0) + DEVESIZE(0) - 1) / DEVESIZE(0); | |
9eeaa8e6 | 1335 | #ifdef DEVICE1_ESIZE |
4a6fd34b | 1336 | DEVESIZE (0) = DEVICE1_ESIZE; |
9eeaa8e6 RB |
1337 | #endif |
1338 | #ifdef DEVICE1_ENVSECTORS | |
56086921 | 1339 | ENVSECTORS (0) = DEVICE1_ENVSECTORS; |
9eeaa8e6 RB |
1340 | #endif |
1341 | ||
6aff3115 | 1342 | #ifdef HAVE_REDUND |
229695fe | 1343 | DEVNAME (1) = DEVICE2_NAME; |
4a6fd34b WD |
1344 | DEVOFFSET (1) = DEVICE2_OFFSET; |
1345 | ENVSIZE (1) = ENV2_SIZE; | |
23869bf8 | 1346 | /* Default values are: erase-size=env-size */ |
9eeaa8e6 | 1347 | DEVESIZE (1) = ENVSIZE (1); |
23869bf8 DB |
1348 | /* #sectors=env-size/erase-size (rounded up) */ |
1349 | ENVSECTORS (1) = (ENVSIZE(1) + DEVESIZE(1) - 1) / DEVESIZE(1); | |
9eeaa8e6 | 1350 | #ifdef DEVICE2_ESIZE |
4a6fd34b | 1351 | DEVESIZE (1) = DEVICE2_ESIZE; |
9eeaa8e6 RB |
1352 | #endif |
1353 | #ifdef DEVICE2_ENVSECTORS | |
56086921 | 1354 | ENVSECTORS (1) = DEVICE2_ENVSECTORS; |
9eeaa8e6 | 1355 | #endif |
d0fb80c3 | 1356 | HaveRedundEnv = 1; |
6aff3115 | 1357 | #endif |
d0fb80c3 | 1358 | #endif |
4a6fd34b WD |
1359 | if (stat (DEVNAME (0), &st)) { |
1360 | fprintf (stderr, | |
1361 | "Cannot access MTD device %s: %s\n", | |
1362 | DEVNAME (0), strerror (errno)); | |
56086921 | 1363 | return -1; |
d0fb80c3 | 1364 | } |
4a6fd34b WD |
1365 | |
1366 | if (HaveRedundEnv && stat (DEVNAME (1), &st)) { | |
1367 | fprintf (stderr, | |
1368 | "Cannot access MTD device %s: %s\n", | |
e2146b6a | 1369 | DEVNAME (1), strerror (errno)); |
56086921 | 1370 | return -1; |
d0fb80c3 | 1371 | } |
6aff3115 WD |
1372 | return 0; |
1373 | } | |
d0fb80c3 WD |
1374 | |
1375 | #if defined(CONFIG_FILE) | |
1376 | static int get_config (char *fname) | |
1377 | { | |
1378 | FILE *fp; | |
1379 | int i = 0; | |
1380 | int rc; | |
1381 | char dump[128]; | |
229695fe | 1382 | char *devname; |
d0fb80c3 | 1383 | |
56086921 GL |
1384 | fp = fopen (fname, "r"); |
1385 | if (fp == NULL) | |
1386 | return -1; | |
d0fb80c3 | 1387 | |
56086921 | 1388 | while (i < 2 && fgets (dump, sizeof (dump), fp)) { |
d0fb80c3 | 1389 | /* Skip incomplete conversions and comment strings */ |
56086921 | 1390 | if (dump[0] == '#') |
d0fb80c3 | 1391 | continue; |
56086921 | 1392 | |
229695fe TR |
1393 | rc = sscanf (dump, "%ms %lx %lx %lx %lx", |
1394 | &devname, | |
56086921 GL |
1395 | &DEVOFFSET (i), |
1396 | &ENVSIZE (i), | |
1397 | &DEVESIZE (i), | |
1398 | &ENVSECTORS (i)); | |
1399 | ||
9eeaa8e6 | 1400 | if (rc < 3) |
56086921 GL |
1401 | continue; |
1402 | ||
229695fe TR |
1403 | DEVNAME(i) = devname; |
1404 | ||
9eeaa8e6 RB |
1405 | if (rc < 4) |
1406 | /* Assume the erase size is the same as the env-size */ | |
1407 | DEVESIZE(i) = ENVSIZE(i); | |
1408 | ||
56086921 | 1409 | if (rc < 5) |
23869bf8 DB |
1410 | /* Assume enough env sectors to cover the environment */ |
1411 | ENVSECTORS (i) = (ENVSIZE(i) + DEVESIZE(i) - 1) / DEVESIZE(i); | |
d0fb80c3 WD |
1412 | |
1413 | i++; | |
1414 | } | |
4a6fd34b WD |
1415 | fclose (fp); |
1416 | ||
d0fb80c3 | 1417 | HaveRedundEnv = i - 1; |
4a6fd34b | 1418 | if (!i) { /* No valid entries found */ |
d0fb80c3 | 1419 | errno = EINVAL; |
56086921 | 1420 | return -1; |
d0fb80c3 WD |
1421 | } else |
1422 | return 0; | |
1423 | } | |
1424 | #endif |