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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> |
f4742ca0 | 17 | #include <linux/fs.h> |
06134211 | 18 | #include <linux/stringify.h> |
10667e15 | 19 | #include <ctype.h> |
6aff3115 WD |
20 | #include <stdio.h> |
21 | #include <stdlib.h> | |
22 | #include <stddef.h> | |
23 | #include <string.h> | |
24 | #include <sys/types.h> | |
25 | #include <sys/ioctl.h> | |
26 | #include <sys/stat.h> | |
27 | #include <unistd.h> | |
34255b92 | 28 | #include <dirent.h> |
6aff3115 | 29 | |
6de66b35 | 30 | #ifdef MTD_OLD |
1711f3bd | 31 | # include <stdint.h> |
6de66b35 MK |
32 | # include <linux/mtd/mtd.h> |
33 | #else | |
c83d7ca4 | 34 | # define __user /* nothing */ |
6de66b35 MK |
35 | # include <mtd/mtd-user.h> |
36 | #endif | |
37 | ||
34255b92 LC |
38 | #include <mtd/ubi-user.h> |
39 | ||
9d80b49a | 40 | #include "fw_env_private.h" |
6de66b35 | 41 | #include "fw_env.h" |
6aff3115 | 42 | |
14070e69 AF |
43 | struct env_opts default_opts = { |
44 | #ifdef CONFIG_FILE | |
45 | .config_file = CONFIG_FILE | |
46 | #endif | |
47 | }; | |
48 | ||
a8a752c0 MV |
49 | #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) |
50 | ||
56086921 GL |
51 | #define min(x, y) ({ \ |
52 | typeof(x) _min1 = (x); \ | |
53 | typeof(y) _min2 = (y); \ | |
54 | (void) (&_min1 == &_min2); \ | |
55 | _min1 < _min2 ? _min1 : _min2; }) | |
56 | ||
57 | struct envdev_s { | |
229695fe | 58 | const char *devname; /* Device name */ |
f4742ca0 | 59 | long long devoff; /* Device offset */ |
4a6fd34b WD |
60 | ulong env_size; /* environment size */ |
61 | ulong erase_size; /* device erase size */ | |
56086921 GL |
62 | ulong env_sectors; /* number of environment sectors */ |
63 | uint8_t mtd_type; /* type of the MTD device */ | |
34255b92 | 64 | int is_ubi; /* set if we use UBI volume */ |
56086921 | 65 | }; |
6aff3115 | 66 | |
56086921 GL |
67 | static struct envdev_s envdevices[2] = |
68 | { | |
69 | { | |
70 | .mtd_type = MTD_ABSENT, | |
71 | }, { | |
72 | .mtd_type = MTD_ABSENT, | |
73 | }, | |
74 | }; | |
75 | static int dev_current; | |
6aff3115 WD |
76 | |
77 | #define DEVNAME(i) envdevices[(i)].devname | |
d0fb80c3 | 78 | #define DEVOFFSET(i) envdevices[(i)].devoff |
6aff3115 WD |
79 | #define ENVSIZE(i) envdevices[(i)].env_size |
80 | #define DEVESIZE(i) envdevices[(i)].erase_size | |
56086921 GL |
81 | #define ENVSECTORS(i) envdevices[(i)].env_sectors |
82 | #define DEVTYPE(i) envdevices[(i)].mtd_type | |
34255b92 | 83 | #define IS_UBI(i) envdevices[(i)].is_ubi |
6aff3115 | 84 | |
497f2053 | 85 | #define CUR_ENVSIZE ENVSIZE(dev_current) |
6aff3115 | 86 | |
f71cee4b AF |
87 | static unsigned long usable_envsize; |
88 | #define ENV_SIZE usable_envsize | |
6aff3115 | 89 | |
56086921 GL |
90 | struct env_image_single { |
91 | uint32_t crc; /* CRC32 over data bytes */ | |
92 | char data[]; | |
93 | }; | |
6aff3115 | 94 | |
56086921 GL |
95 | struct env_image_redundant { |
96 | uint32_t crc; /* CRC32 over data bytes */ | |
97 | unsigned char flags; /* active or obsolete */ | |
98 | char data[]; | |
99 | }; | |
100 | ||
101 | enum flag_scheme { | |
102 | FLAG_NONE, | |
103 | FLAG_BOOLEAN, | |
104 | FLAG_INCREMENTAL, | |
105 | }; | |
106 | ||
107 | struct environment { | |
108 | void *image; | |
109 | uint32_t *crc; | |
110 | unsigned char *flags; | |
111 | char *data; | |
112 | enum flag_scheme flag_scheme; | |
113 | }; | |
114 | ||
115 | static struct environment environment = { | |
116 | .flag_scheme = FLAG_NONE, | |
117 | }; | |
6aff3115 | 118 | |
d0fb80c3 WD |
119 | static int HaveRedundEnv = 0; |
120 | ||
6de66b35 | 121 | static unsigned char active_flag = 1; |
56086921 | 122 | /* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */ |
6de66b35 | 123 | static unsigned char obsolete_flag = 0; |
d0fb80c3 | 124 | |
ddd8418f JH |
125 | #define DEFAULT_ENV_INSTANCE_STATIC |
126 | #include <env_default.h> | |
6aff3115 | 127 | |
34255b92 LC |
128 | #define UBI_DEV_START "/dev/ubi" |
129 | #define UBI_SYSFS "/sys/class/ubi" | |
130 | #define UBI_VOL_NAME_PATT "ubi%d_%d" | |
131 | ||
132 | static int is_ubi_devname(const char *devname) | |
133 | { | |
134 | return !strncmp(devname, UBI_DEV_START, sizeof(UBI_DEV_START) - 1); | |
135 | } | |
136 | ||
137 | static int ubi_check_volume_sysfs_name(const char *volume_sysfs_name, | |
138 | const char *volname) | |
139 | { | |
140 | char path[256]; | |
141 | FILE *file; | |
142 | char *name; | |
143 | int ret; | |
144 | ||
145 | strcpy(path, UBI_SYSFS "/"); | |
146 | strcat(path, volume_sysfs_name); | |
147 | strcat(path, "/name"); | |
148 | ||
149 | file = fopen(path, "r"); | |
150 | if (!file) | |
151 | return -1; | |
152 | ||
153 | ret = fscanf(file, "%ms", &name); | |
154 | fclose(file); | |
155 | if (ret <= 0 || !name) { | |
156 | fprintf(stderr, | |
157 | "Failed to read from file %s, ret = %d, name = %s\n", | |
158 | path, ret, name); | |
159 | return -1; | |
160 | } | |
161 | ||
162 | if (!strcmp(name, volname)) { | |
163 | free(name); | |
164 | return 0; | |
165 | } | |
166 | free(name); | |
167 | ||
168 | return -1; | |
169 | } | |
170 | ||
171 | static int ubi_get_volnum_by_name(int devnum, const char *volname) | |
172 | { | |
173 | DIR *sysfs_ubi; | |
174 | struct dirent *dirent; | |
175 | int ret; | |
176 | int tmp_devnum; | |
177 | int volnum; | |
178 | ||
179 | sysfs_ubi = opendir(UBI_SYSFS); | |
180 | if (!sysfs_ubi) | |
181 | return -1; | |
182 | ||
183 | #ifdef DEBUG | |
184 | fprintf(stderr, "Looking for volume name \"%s\"\n", volname); | |
185 | #endif | |
186 | ||
187 | while (1) { | |
188 | dirent = readdir(sysfs_ubi); | |
189 | if (!dirent) | |
190 | return -1; | |
191 | ||
192 | ret = sscanf(dirent->d_name, UBI_VOL_NAME_PATT, | |
193 | &tmp_devnum, &volnum); | |
194 | if (ret == 2 && devnum == tmp_devnum) { | |
195 | if (ubi_check_volume_sysfs_name(dirent->d_name, | |
196 | volname) == 0) | |
197 | return volnum; | |
198 | } | |
199 | } | |
200 | ||
201 | return -1; | |
202 | } | |
203 | ||
204 | static int ubi_get_devnum_by_devname(const char *devname) | |
205 | { | |
206 | int devnum; | |
207 | int ret; | |
208 | ||
209 | ret = sscanf(devname + sizeof(UBI_DEV_START) - 1, "%d", &devnum); | |
210 | if (ret != 1) | |
211 | return -1; | |
212 | ||
213 | return devnum; | |
214 | } | |
215 | ||
216 | static const char *ubi_get_volume_devname(const char *devname, | |
217 | const char *volname) | |
218 | { | |
219 | char *volume_devname; | |
220 | int volnum; | |
221 | int devnum; | |
222 | int ret; | |
223 | ||
224 | devnum = ubi_get_devnum_by_devname(devname); | |
225 | if (devnum < 0) | |
226 | return NULL; | |
227 | ||
228 | volnum = ubi_get_volnum_by_name(devnum, volname); | |
229 | if (volnum < 0) | |
230 | return NULL; | |
231 | ||
232 | ret = asprintf(&volume_devname, "%s_%d", devname, volnum); | |
233 | if (ret < 0) | |
234 | return NULL; | |
235 | ||
236 | #ifdef DEBUG | |
237 | fprintf(stderr, "Found ubi volume \"%s:%s\" -> %s\n", | |
238 | devname, volname, volume_devname); | |
239 | #endif | |
240 | ||
241 | return volume_devname; | |
242 | } | |
243 | ||
244 | static void ubi_check_dev(unsigned int dev_id) | |
245 | { | |
246 | char *devname = (char *)DEVNAME(dev_id); | |
247 | char *pname; | |
248 | const char *volname = NULL; | |
249 | const char *volume_devname; | |
250 | ||
251 | if (!is_ubi_devname(DEVNAME(dev_id))) | |
252 | return; | |
253 | ||
254 | IS_UBI(dev_id) = 1; | |
255 | ||
256 | for (pname = devname; *pname != '\0'; pname++) { | |
257 | if (*pname == ':') { | |
258 | *pname = '\0'; | |
259 | volname = pname + 1; | |
260 | break; | |
261 | } | |
262 | } | |
263 | ||
264 | if (volname) { | |
265 | /* Let's find real volume device name */ | |
266 | volume_devname = ubi_get_volume_devname(devname, volname); | |
267 | if (!volume_devname) { | |
268 | fprintf(stderr, "Didn't found ubi volume \"%s\"\n", | |
269 | volname); | |
270 | return; | |
271 | } | |
272 | ||
273 | free(devname); | |
274 | DEVNAME(dev_id) = volume_devname; | |
275 | } | |
276 | } | |
277 | ||
278 | static int ubi_update_start(int fd, int64_t bytes) | |
279 | { | |
280 | if (ioctl(fd, UBI_IOCVOLUP, &bytes)) | |
281 | return -1; | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static int ubi_read(int fd, void *buf, size_t count) | |
286 | { | |
287 | ssize_t ret; | |
288 | ||
289 | while (count > 0) { | |
290 | ret = read(fd, buf, count); | |
291 | if (ret > 0) { | |
292 | count -= ret; | |
293 | buf += ret; | |
294 | ||
295 | continue; | |
296 | } | |
297 | ||
298 | if (ret == 0) { | |
299 | /* | |
300 | * Happens in case of too short volume data size. If we | |
301 | * return error status we will fail it will be treated | |
302 | * as UBI device error. | |
303 | * | |
304 | * Leave catching this error to CRC check. | |
305 | */ | |
306 | fprintf(stderr, "Warning: end of data on ubi volume\n"); | |
307 | return 0; | |
308 | } else if (errno == EBADF) { | |
309 | /* | |
310 | * Happens in case of corrupted volume. The same as | |
311 | * above, we cannot return error now, as we will still | |
312 | * be able to successfully write environment later. | |
313 | */ | |
314 | fprintf(stderr, "Warning: corrupted volume?\n"); | |
315 | return 0; | |
316 | } else if (errno == EINTR) { | |
317 | continue; | |
318 | } | |
319 | ||
320 | fprintf(stderr, "Cannot read %u bytes from ubi volume, %s\n", | |
321 | (unsigned int)count, strerror(errno)); | |
322 | return -1; | |
323 | } | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | static int ubi_write(int fd, const void *buf, size_t count) | |
329 | { | |
330 | ssize_t ret; | |
331 | ||
332 | while (count > 0) { | |
333 | ret = write(fd, buf, count); | |
334 | if (ret <= 0) { | |
335 | if (ret < 0 && errno == EINTR) | |
336 | continue; | |
337 | ||
338 | fprintf(stderr, "Cannot write %u bytes to ubi volume\n", | |
339 | (unsigned int)count); | |
340 | return -1; | |
341 | } | |
342 | ||
343 | count -= ret; | |
344 | buf += ret; | |
345 | } | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
4a6fd34b | 350 | static int flash_io (int mode); |
81974f44 | 351 | static int parse_config(struct env_opts *opts); |
4a6fd34b | 352 | |
d0fb80c3 | 353 | #if defined(CONFIG_FILE) |
4a6fd34b | 354 | static int get_config (char *); |
d0fb80c3 | 355 | #endif |
6aff3115 | 356 | |
938c29ff | 357 | static char *skip_chars(char *s) |
bd7b26f8 | 358 | { |
938c29ff AF |
359 | for (; *s != '\0'; s++) { |
360 | if (isblank(*s)) | |
361 | return s; | |
362 | } | |
363 | return NULL; | |
364 | } | |
bd7b26f8 | 365 | |
938c29ff AF |
366 | static char *skip_blanks(char *s) |
367 | { | |
368 | for (; *s != '\0'; s++) { | |
369 | if (!isblank(*s)) | |
9583efcc | 370 | return s; |
bd7b26f8 | 371 | } |
9583efcc | 372 | return NULL; |
bd7b26f8 SB |
373 | } |
374 | ||
6aff3115 | 375 | /* |
1b7427cd AF |
376 | * s1 is either a simple 'name', or a 'name=value' pair. |
377 | * s2 is a 'name=value' pair. | |
378 | * If the names match, return the value of s2, else NULL. | |
379 | */ | |
380 | static char *envmatch(char *s1, char *s2) | |
381 | { | |
382 | if (s1 == NULL || s2 == NULL) | |
383 | return NULL; | |
384 | ||
385 | while (*s1 == *s2++) | |
386 | if (*s1++ == '=') | |
387 | return s2; | |
388 | if (*s1 == '\0' && *(s2 - 1) == '=') | |
389 | return s2; | |
390 | return NULL; | |
391 | } | |
392 | ||
393 | /** | |
6aff3115 WD |
394 | * Search the environment for a variable. |
395 | * Return the value, if found, or NULL, if not found. | |
396 | */ | |
6de66b35 | 397 | char *fw_getenv (char *name) |
6aff3115 | 398 | { |
6de66b35 | 399 | char *env, *nxt; |
6aff3115 | 400 | |
4a6fd34b | 401 | for (env = environment.data; *env; env = nxt + 1) { |
6de66b35 | 402 | char *val; |
6aff3115 | 403 | |
4a6fd34b | 404 | for (nxt = env; *nxt; ++nxt) { |
6aff3115 WD |
405 | if (nxt >= &environment.data[ENV_SIZE]) { |
406 | fprintf (stderr, "## Error: " | |
407 | "environment not terminated\n"); | |
56086921 | 408 | return NULL; |
6aff3115 WD |
409 | } |
410 | } | |
4a6fd34b | 411 | val = envmatch (name, env); |
6aff3115 WD |
412 | if (!val) |
413 | continue; | |
56086921 | 414 | return val; |
6aff3115 | 415 | } |
56086921 | 416 | return NULL; |
6aff3115 WD |
417 | } |
418 | ||
267541f7 JH |
419 | /* |
420 | * Search the default environment for a variable. | |
421 | * Return the value, if found, or NULL, if not found. | |
422 | */ | |
423 | char *fw_getdefenv(char *name) | |
424 | { | |
425 | char *env, *nxt; | |
426 | ||
427 | for (env = default_environment; *env; env = nxt + 1) { | |
428 | char *val; | |
429 | ||
430 | for (nxt = env; *nxt; ++nxt) { | |
431 | if (nxt >= &default_environment[ENV_SIZE]) { | |
432 | fprintf(stderr, "## Error: " | |
433 | "default environment not terminated\n"); | |
434 | return NULL; | |
435 | } | |
436 | } | |
437 | val = envmatch(name, env); | |
438 | if (!val) | |
439 | continue; | |
440 | return val; | |
441 | } | |
442 | return NULL; | |
443 | } | |
444 | ||
6aff3115 WD |
445 | /* |
446 | * Print the current definition of one, or more, or all | |
447 | * environment variables | |
448 | */ | |
81974f44 | 449 | int fw_printenv(int argc, char *argv[], int value_only, struct env_opts *opts) |
6aff3115 | 450 | { |
371ee137 | 451 | int i, rc = 0; |
6aff3115 | 452 | |
c5c41c45 AF |
453 | if (value_only && argc != 1) { |
454 | fprintf(stderr, | |
d877a6c5 | 455 | "## Error: `-n'/`--noheader' option requires exactly one argument\n"); |
c5c41c45 AF |
456 | return -1; |
457 | } | |
458 | ||
14070e69 AF |
459 | if (!opts) |
460 | opts = &default_opts; | |
461 | ||
81974f44 | 462 | if (fw_env_open(opts)) |
56086921 | 463 | return -1; |
6aff3115 | 464 | |
1ce68697 | 465 | if (argc == 0) { /* Print all env variables */ |
c5c41c45 | 466 | char *env, *nxt; |
4a6fd34b WD |
467 | for (env = environment.data; *env; env = nxt + 1) { |
468 | for (nxt = env; *nxt; ++nxt) { | |
6aff3115 WD |
469 | if (nxt >= &environment.data[ENV_SIZE]) { |
470 | fprintf (stderr, "## Error: " | |
471 | "environment not terminated\n"); | |
56086921 | 472 | return -1; |
6aff3115 WD |
473 | } |
474 | } | |
475 | ||
4a6fd34b | 476 | printf ("%s\n", env); |
6aff3115 | 477 | } |
33f0086c | 478 | fw_env_close(opts); |
56086921 | 479 | return 0; |
6aff3115 WD |
480 | } |
481 | ||
c5c41c45 | 482 | for (i = 0; i < argc; ++i) { /* print a subset of env variables */ |
6de66b35 MK |
483 | char *name = argv[i]; |
484 | char *val = NULL; | |
6aff3115 | 485 | |
c5c41c45 | 486 | val = fw_getenv(name); |
bc11756d | 487 | if (!val) { |
4a6fd34b | 488 | fprintf (stderr, "## Error: \"%s\" not defined\n", name); |
bc11756d | 489 | rc = -1; |
c5c41c45 | 490 | continue; |
bc11756d | 491 | } |
c5c41c45 AF |
492 | |
493 | if (value_only) { | |
494 | puts(val); | |
495 | break; | |
496 | } | |
497 | ||
498 | printf("%s=%s\n", name, val); | |
6aff3115 | 499 | } |
bc11756d | 500 | |
33f0086c SB |
501 | fw_env_close(opts); |
502 | ||
56086921 | 503 | return rc; |
6aff3115 WD |
504 | } |
505 | ||
33f0086c | 506 | int fw_env_flush(struct env_opts *opts) |
6aff3115 | 507 | { |
14070e69 AF |
508 | if (!opts) |
509 | opts = &default_opts; | |
510 | ||
bd7b26f8 SB |
511 | /* |
512 | * Update CRC | |
513 | */ | |
514 | *environment.crc = crc32(0, (uint8_t *) environment.data, ENV_SIZE); | |
6aff3115 | 515 | |
bd7b26f8 SB |
516 | /* write environment back to flash */ |
517 | if (flash_io(O_RDWR)) { | |
518 | fprintf(stderr, | |
519 | "Error: can't write fw_env to flash\n"); | |
520 | return -1; | |
6aff3115 WD |
521 | } |
522 | ||
bd7b26f8 SB |
523 | return 0; |
524 | } | |
6aff3115 | 525 | |
bd7b26f8 SB |
526 | |
527 | /* | |
528 | * Set/Clear a single variable in the environment. | |
529 | * This is called in sequence to update the environment | |
530 | * in RAM without updating the copy in flash after each set | |
531 | */ | |
532 | int fw_env_write(char *name, char *value) | |
533 | { | |
534 | int len; | |
535 | char *env, *nxt; | |
536 | char *oldval = NULL; | |
267541f7 | 537 | int deleting, creating, overwriting; |
6aff3115 WD |
538 | |
539 | /* | |
540 | * search if variable with this name already exists | |
541 | */ | |
4a6fd34b WD |
542 | for (nxt = env = environment.data; *env; env = nxt + 1) { |
543 | for (nxt = env; *nxt; ++nxt) { | |
6aff3115 | 544 | if (nxt >= &environment.data[ENV_SIZE]) { |
bd7b26f8 | 545 | fprintf(stderr, "## Error: " |
6aff3115 | 546 | "environment not terminated\n"); |
56086921 GL |
547 | errno = EINVAL; |
548 | return -1; | |
6aff3115 WD |
549 | } |
550 | } | |
4a6fd34b | 551 | if ((oldval = envmatch (name, env)) != NULL) |
6aff3115 WD |
552 | break; |
553 | } | |
554 | ||
267541f7 JH |
555 | deleting = (oldval && !(value && strlen(value))); |
556 | creating = (!oldval && (value && strlen(value))); | |
557 | overwriting = (oldval && (value && strlen(value))); | |
558 | ||
559 | /* check for permission */ | |
560 | if (deleting) { | |
561 | if (env_flags_validate_varaccess(name, | |
562 | ENV_FLAGS_VARACCESS_PREVENT_DELETE)) { | |
563 | printf("Can't delete \"%s\"\n", name); | |
564 | errno = EROFS; | |
565 | return -1; | |
566 | } | |
567 | } else if (overwriting) { | |
568 | if (env_flags_validate_varaccess(name, | |
569 | ENV_FLAGS_VARACCESS_PREVENT_OVERWR)) { | |
570 | printf("Can't overwrite \"%s\"\n", name); | |
571 | errno = EROFS; | |
572 | return -1; | |
573 | } else if (env_flags_validate_varaccess(name, | |
574 | ENV_FLAGS_VARACCESS_PREVENT_NONDEF_OVERWR)) { | |
575 | const char *defval = fw_getdefenv(name); | |
576 | ||
577 | if (defval == NULL) | |
578 | defval = ""; | |
579 | if (strcmp(oldval, defval) | |
580 | != 0) { | |
581 | printf("Can't overwrite \"%s\"\n", name); | |
582 | errno = EROFS; | |
583 | return -1; | |
584 | } | |
585 | } | |
586 | } else if (creating) { | |
587 | if (env_flags_validate_varaccess(name, | |
588 | ENV_FLAGS_VARACCESS_PREVENT_CREATE)) { | |
589 | printf("Can't create \"%s\"\n", name); | |
590 | errno = EROFS; | |
591 | return -1; | |
592 | } | |
593 | } else | |
594 | /* Nothing to do */ | |
595 | return 0; | |
596 | ||
597 | if (deleting || overwriting) { | |
6aff3115 WD |
598 | if (*++nxt == '\0') { |
599 | *env = '\0'; | |
600 | } else { | |
601 | for (;;) { | |
602 | *env = *nxt++; | |
603 | if ((*env == '\0') && (*nxt == '\0')) | |
604 | break; | |
605 | ++env; | |
606 | } | |
607 | } | |
608 | *++env = '\0'; | |
609 | } | |
610 | ||
611 | /* Delete only ? */ | |
bd7b26f8 SB |
612 | if (!value || !strlen(value)) |
613 | return 0; | |
6aff3115 WD |
614 | |
615 | /* | |
616 | * Append new definition at the end | |
617 | */ | |
4a6fd34b | 618 | for (env = environment.data; *env || *(env + 1); ++env); |
6aff3115 WD |
619 | if (env > environment.data) |
620 | ++env; | |
621 | /* | |
622 | * Overflow when: | |
497f2053 | 623 | * "name" + "=" + "val" +"\0\0" > CUR_ENVSIZE - (env-environment) |
6aff3115 | 624 | */ |
4a6fd34b | 625 | len = strlen (name) + 2; |
6aff3115 | 626 | /* add '=' for first arg, ' ' for all others */ |
bd7b26f8 SB |
627 | len += strlen(value) + 1; |
628 | ||
4a6fd34b | 629 | if (len > (&environment.data[ENV_SIZE] - env)) { |
6aff3115 WD |
630 | fprintf (stderr, |
631 | "Error: environment overflow, \"%s\" deleted\n", | |
632 | name); | |
56086921 | 633 | return -1; |
6aff3115 | 634 | } |
bd7b26f8 | 635 | |
6aff3115 WD |
636 | while ((*env = *name++) != '\0') |
637 | env++; | |
bd7b26f8 SB |
638 | *env = '='; |
639 | while ((*++env = *value++) != '\0') | |
640 | ; | |
641 | ||
642 | /* end is marked with double '\0' */ | |
643 | *++env = '\0'; | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
648 | /* | |
649 | * Deletes or sets environment variables. Returns -1 and sets errno error codes: | |
650 | * 0 - OK | |
651 | * EINVAL - need at least 1 argument | |
652 | * EROFS - certain variables ("ethaddr", "serial#") cannot be | |
653 | * modified or deleted | |
654 | * | |
655 | */ | |
382bee57 | 656 | int fw_env_set(int argc, char *argv[], struct env_opts *opts) |
bd7b26f8 | 657 | { |
371ee137 | 658 | int i; |
3779c8e3 | 659 | size_t len; |
167f5258 | 660 | char *name, **valv; |
ddc6a9de | 661 | char *oldval; |
bd7b26f8 | 662 | char *value = NULL; |
167f5258 | 663 | int valc; |
33f0086c | 664 | int ret; |
bd7b26f8 | 665 | |
14070e69 AF |
666 | if (!opts) |
667 | opts = &default_opts; | |
668 | ||
1ce68697 AF |
669 | if (argc < 1) { |
670 | fprintf(stderr, "## Error: variable name missing\n"); | |
a8a752c0 MV |
671 | errno = EINVAL; |
672 | return -1; | |
673 | } | |
674 | ||
81974f44 | 675 | if (fw_env_open(opts)) { |
bd7b26f8 SB |
676 | fprintf(stderr, "Error: environment not initialized\n"); |
677 | return -1; | |
678 | } | |
679 | ||
1ce68697 AF |
680 | name = argv[0]; |
681 | valv = argv + 1; | |
682 | valc = argc - 1; | |
bd7b26f8 | 683 | |
33f0086c SB |
684 | if (env_flags_validate_env_set_params(name, valv, valc) < 0) { |
685 | fw_env_close(opts); | |
fd4e3280 | 686 | return -1; |
33f0086c | 687 | } |
30fd4fad | 688 | |
62a34a04 | 689 | len = 0; |
167f5258 AF |
690 | for (i = 0; i < valc; ++i) { |
691 | char *val = valv[i]; | |
62a34a04 JH |
692 | size_t val_len = strlen(val); |
693 | ||
ce2f5800 JH |
694 | if (value) |
695 | value[len - 1] = ' '; | |
ddc6a9de | 696 | oldval = value; |
62a34a04 | 697 | value = realloc(value, len + val_len + 1); |
bd7b26f8 | 698 | if (!value) { |
62a34a04 | 699 | fprintf(stderr, |
8603b69b | 700 | "Cannot malloc %zu bytes: %s\n", |
62a34a04 | 701 | len, strerror(errno)); |
ddc6a9de | 702 | free(oldval); |
62a34a04 | 703 | return -1; |
bd7b26f8 | 704 | } |
62a34a04 JH |
705 | |
706 | memcpy(value + len, val, val_len); | |
707 | len += val_len; | |
ce2f5800 | 708 | value[len++] = '\0'; |
6aff3115 WD |
709 | } |
710 | ||
bd7b26f8 | 711 | fw_env_write(name, value); |
6aff3115 | 712 | |
62a34a04 | 713 | free(value); |
6aff3115 | 714 | |
33f0086c SB |
715 | ret = fw_env_flush(opts); |
716 | fw_env_close(opts); | |
717 | ||
718 | return ret; | |
bd7b26f8 | 719 | } |
6aff3115 | 720 | |
bd7b26f8 SB |
721 | /* |
722 | * Parse a file and configure the u-boot variables. | |
723 | * The script file has a very simple format, as follows: | |
724 | * | |
725 | * Each line has a couple with name, value: | |
726 | * <white spaces>variable_name<white spaces>variable_value | |
727 | * | |
728 | * Both variable_name and variable_value are interpreted as strings. | |
729 | * Any character after <white spaces> and before ending \r\n is interpreted | |
730 | * as variable's value (no comment allowed on these lines !) | |
731 | * | |
732 | * Comments are allowed if the first character in the line is # | |
733 | * | |
734 | * Returns -1 and sets errno error codes: | |
735 | * 0 - OK | |
736 | * -1 - Error | |
737 | */ | |
81974f44 | 738 | int fw_parse_script(char *fname, struct env_opts *opts) |
bd7b26f8 SB |
739 | { |
740 | FILE *fp; | |
741 | char dump[1024]; /* Maximum line length in the file */ | |
742 | char *name; | |
743 | char *val; | |
744 | int lineno = 0; | |
745 | int len; | |
746 | int ret = 0; | |
747 | ||
14070e69 AF |
748 | if (!opts) |
749 | opts = &default_opts; | |
750 | ||
81974f44 | 751 | if (fw_env_open(opts)) { |
bd7b26f8 | 752 | fprintf(stderr, "Error: environment not initialized\n"); |
56086921 | 753 | return -1; |
6aff3115 WD |
754 | } |
755 | ||
bd7b26f8 SB |
756 | if (strcmp(fname, "-") == 0) |
757 | fp = stdin; | |
758 | else { | |
759 | fp = fopen(fname, "r"); | |
760 | if (fp == NULL) { | |
761 | fprintf(stderr, "I cannot open %s for reading\n", | |
762 | fname); | |
763 | return -1; | |
764 | } | |
765 | } | |
766 | ||
767 | while (fgets(dump, sizeof(dump), fp)) { | |
768 | lineno++; | |
769 | len = strlen(dump); | |
770 | ||
771 | /* | |
772 | * Read a whole line from the file. If the line is too long | |
773 | * or is not terminated, reports an error and exit. | |
774 | */ | |
775 | if (dump[len - 1] != '\n') { | |
776 | fprintf(stderr, | |
777 | "Line %d not corrected terminated or too long\n", | |
778 | lineno); | |
779 | ret = -1; | |
780 | break; | |
781 | } | |
782 | ||
783 | /* Drop ending line feed / carriage return */ | |
69067a34 AF |
784 | dump[--len] = '\0'; |
785 | if (len && dump[len - 1] == '\r') | |
786 | dump[--len] = '\0'; | |
bd7b26f8 SB |
787 | |
788 | /* Skip comment or empty lines */ | |
69067a34 | 789 | if (len == 0 || dump[0] == '#') |
bd7b26f8 SB |
790 | continue; |
791 | ||
792 | /* | |
793 | * Search for variable's name, | |
794 | * remove leading whitespaces | |
795 | */ | |
938c29ff | 796 | name = skip_blanks(dump); |
bd7b26f8 SB |
797 | if (!name) |
798 | continue; | |
799 | ||
800 | /* The first white space is the end of variable name */ | |
938c29ff | 801 | val = skip_chars(name); |
bd7b26f8 SB |
802 | len = strlen(name); |
803 | if (val) { | |
804 | *val++ = '\0'; | |
805 | if ((val - name) < len) | |
938c29ff | 806 | val = skip_blanks(val); |
bd7b26f8 SB |
807 | else |
808 | val = NULL; | |
809 | } | |
810 | ||
811 | #ifdef DEBUG | |
812 | fprintf(stderr, "Setting %s : %s\n", | |
813 | name, val ? val : " removed"); | |
814 | #endif | |
815 | ||
30fd4fad JH |
816 | if (env_flags_validate_type(name, val) < 0) { |
817 | ret = -1; | |
818 | break; | |
819 | } | |
820 | ||
bd7b26f8 SB |
821 | /* |
822 | * If there is an error setting a variable, | |
823 | * try to save the environment and returns an error | |
824 | */ | |
825 | if (fw_env_write(name, val)) { | |
826 | fprintf(stderr, | |
827 | "fw_env_write returns with error : %s\n", | |
828 | strerror(errno)); | |
829 | ret = -1; | |
830 | break; | |
831 | } | |
832 | ||
833 | } | |
834 | ||
835 | /* Close file if not stdin */ | |
836 | if (strcmp(fname, "-") != 0) | |
837 | fclose(fp); | |
838 | ||
33f0086c SB |
839 | ret |= fw_env_flush(opts); |
840 | ||
841 | fw_env_close(opts); | |
bd7b26f8 SB |
842 | |
843 | return ret; | |
6aff3115 WD |
844 | } |
845 | ||
e2c9351d AF |
846 | /** |
847 | * environment_end() - compute offset of first byte right after environemnt | |
848 | * @dev - index of enviroment buffer | |
849 | * Return: | |
850 | * device offset of first byte right after environemnt | |
851 | */ | |
852 | off_t environment_end(int dev) | |
853 | { | |
854 | /* environment is block aligned */ | |
855 | return DEVOFFSET(dev) + ENVSECTORS(dev) * DEVESIZE(dev); | |
856 | } | |
857 | ||
56086921 GL |
858 | /* |
859 | * Test for bad block on NAND, just returns 0 on NOR, on NAND: | |
860 | * 0 - block is good | |
861 | * > 0 - block is bad | |
862 | * < 0 - failed to test | |
863 | */ | |
c6012bbc | 864 | static int flash_bad_block(int fd, uint8_t mtd_type, loff_t blockstart) |
6aff3115 | 865 | { |
56086921 | 866 | if (mtd_type == MTD_NANDFLASH) { |
c6012bbc | 867 | int badblock = ioctl(fd, MEMGETBADBLOCK, &blockstart); |
6aff3115 | 868 | |
56086921 GL |
869 | if (badblock < 0) { |
870 | perror ("Cannot read bad block mark"); | |
871 | return badblock; | |
872 | } | |
873 | ||
874 | if (badblock) { | |
875 | #ifdef DEBUG | |
81c878dd | 876 | fprintf (stderr, "Bad block at 0x%llx, skipping\n", |
c6012bbc | 877 | (unsigned long long)blockstart); |
56086921 GL |
878 | #endif |
879 | return badblock; | |
880 | } | |
6aff3115 WD |
881 | } |
882 | ||
56086921 GL |
883 | return 0; |
884 | } | |
885 | ||
886 | /* | |
887 | * Read data from flash at an offset into a provided buffer. On NAND it skips | |
888 | * bad blocks but makes sure it stays within ENVSECTORS (dev) starting from | |
889 | * the DEVOFFSET (dev) block. On NOR the loop is only run once. | |
890 | */ | |
891 | static int flash_read_buf (int dev, int fd, void *buf, size_t count, | |
ff95e579 | 892 | off_t offset) |
56086921 GL |
893 | { |
894 | size_t blocklen; /* erase / write length - one block on NAND, | |
895 | 0 on NOR */ | |
896 | size_t processed = 0; /* progress counter */ | |
897 | size_t readlen = count; /* current read length */ | |
56086921 GL |
898 | off_t block_seek; /* offset inside the current block to the start |
899 | of the data */ | |
900 | loff_t blockstart; /* running start of the current block - | |
901 | MEMGETBADBLOCK needs 64 bits */ | |
902 | int rc; | |
903 | ||
9eeaa8e6 | 904 | blockstart = (offset / DEVESIZE (dev)) * DEVESIZE (dev); |
56086921 GL |
905 | |
906 | /* Offset inside a block */ | |
907 | block_seek = offset - blockstart; | |
908 | ||
ff95e579 | 909 | if (DEVTYPE(dev) == MTD_NANDFLASH) { |
56086921 GL |
910 | /* |
911 | * NAND: calculate which blocks we are reading. We have | |
912 | * to read one block at a time to skip bad blocks. | |
913 | */ | |
914 | blocklen = DEVESIZE (dev); | |
915 | ||
56086921 GL |
916 | /* Limit to one block for the first read */ |
917 | if (readlen > blocklen - block_seek) | |
918 | readlen = blocklen - block_seek; | |
919 | } else { | |
920 | blocklen = 0; | |
d0fb80c3 | 921 | } |
6aff3115 | 922 | |
56086921 GL |
923 | /* This only runs once on NOR flash */ |
924 | while (processed < count) { | |
ff95e579 | 925 | rc = flash_bad_block(fd, DEVTYPE(dev), blockstart); |
56086921 GL |
926 | if (rc < 0) /* block test failed */ |
927 | return -1; | |
6aff3115 | 928 | |
e2c9351d | 929 | if (blockstart + block_seek + readlen > environment_end(dev)) { |
56086921 GL |
930 | /* End of range is reached */ |
931 | fprintf (stderr, | |
932 | "Too few good blocks within range\n"); | |
933 | return -1; | |
d0fb80c3 WD |
934 | } |
935 | ||
56086921 GL |
936 | if (rc) { /* block is bad */ |
937 | blockstart += blocklen; | |
938 | continue; | |
6aff3115 WD |
939 | } |
940 | ||
56086921 GL |
941 | /* |
942 | * If a block is bad, we retry in the next block at the same | |
2d3229be | 943 | * offset - see env/nand.c::writeenv() |
56086921 GL |
944 | */ |
945 | lseek (fd, blockstart + block_seek, SEEK_SET); | |
6aff3115 | 946 | |
56086921 GL |
947 | rc = read (fd, buf + processed, readlen); |
948 | if (rc != readlen) { | |
949 | fprintf (stderr, "Read error on %s: %s\n", | |
950 | DEVNAME (dev), strerror (errno)); | |
951 | return -1; | |
6aff3115 | 952 | } |
56086921 | 953 | #ifdef DEBUG |
74620e1c | 954 | fprintf(stderr, "Read 0x%x bytes at 0x%llx on %s\n", |
81c878dd MN |
955 | rc, (unsigned long long) blockstart + block_seek, |
956 | DEVNAME(dev)); | |
56086921 GL |
957 | #endif |
958 | processed += readlen; | |
959 | readlen = min (blocklen, count - processed); | |
960 | block_seek = 0; | |
961 | blockstart += blocklen; | |
962 | } | |
963 | ||
964 | return processed; | |
965 | } | |
966 | ||
967 | /* | |
24307d63 AF |
968 | * Write count bytes from begin of environment, but stay within |
969 | * ENVSECTORS(dev) sectors of | |
9eeaa8e6 RB |
970 | * DEVOFFSET (dev). Similar to the read case above, on NOR and dataflash we |
971 | * erase and write the whole data at once. | |
56086921 | 972 | */ |
24307d63 | 973 | static int flash_write_buf(int dev, int fd, void *buf, size_t count) |
56086921 GL |
974 | { |
975 | void *data; | |
976 | struct erase_info_user erase; | |
977 | size_t blocklen; /* length of NAND block / NOR erase sector */ | |
978 | size_t erase_len; /* whole area that can be erased - may include | |
979 | bad blocks */ | |
980 | size_t erasesize; /* erase / write length - one block on NAND, | |
981 | whole area on NOR */ | |
982 | size_t processed = 0; /* progress counter */ | |
9eeaa8e6 | 983 | size_t write_total; /* total size to actually write - excluding |
56086921 GL |
984 | bad blocks */ |
985 | off_t erase_offset; /* offset to the first erase block (aligned) | |
986 | below offset */ | |
987 | off_t block_seek; /* offset inside the erase block to the start | |
988 | of the data */ | |
56086921 GL |
989 | loff_t blockstart; /* running start of the current block - |
990 | MEMGETBADBLOCK needs 64 bits */ | |
991 | int rc; | |
992 | ||
e387efbd OM |
993 | /* |
994 | * For mtd devices only offset and size of the environment do matter | |
995 | */ | |
ff95e579 | 996 | if (DEVTYPE(dev) == MTD_ABSENT) { |
e387efbd | 997 | blocklen = count; |
e387efbd | 998 | erase_len = blocklen; |
24307d63 | 999 | blockstart = DEVOFFSET(dev); |
e387efbd OM |
1000 | block_seek = 0; |
1001 | write_total = blocklen; | |
1002 | } else { | |
1003 | blocklen = DEVESIZE(dev); | |
56086921 | 1004 | |
24307d63 | 1005 | erase_offset = DEVOFFSET(dev); |
6aff3115 | 1006 | |
e387efbd | 1007 | /* Maximum area we may use */ |
e2c9351d | 1008 | erase_len = environment_end(dev) - erase_offset; |
56086921 | 1009 | |
e387efbd | 1010 | blockstart = erase_offset; |
24307d63 | 1011 | |
e387efbd | 1012 | /* Offset inside a block */ |
24307d63 | 1013 | block_seek = DEVOFFSET(dev) - erase_offset; |
56086921 | 1014 | |
e387efbd OM |
1015 | /* |
1016 | * Data size we actually write: from the start of the block | |
1017 | * to the start of the data, then count bytes of data, and | |
1018 | * to the end of the block | |
1019 | */ | |
1020 | write_total = ((block_seek + count + blocklen - 1) / | |
1021 | blocklen) * blocklen; | |
1022 | } | |
56086921 GL |
1023 | |
1024 | /* | |
1025 | * Support data anywhere within erase sectors: read out the complete | |
1026 | * area to be erased, replace the environment image, write the whole | |
1027 | * block back again. | |
1028 | */ | |
1029 | if (write_total > count) { | |
1030 | data = malloc (erase_len); | |
1031 | if (!data) { | |
d0fb80c3 | 1032 | fprintf (stderr, |
8603b69b | 1033 | "Cannot malloc %zu bytes: %s\n", |
56086921 GL |
1034 | erase_len, strerror (errno)); |
1035 | return -1; | |
d0fb80c3 | 1036 | } |
56086921 | 1037 | |
ff95e579 | 1038 | rc = flash_read_buf(dev, fd, data, write_total, erase_offset); |
56086921 GL |
1039 | if (write_total != rc) |
1040 | return -1; | |
1041 | ||
74620e1c JH |
1042 | #ifdef DEBUG |
1043 | fprintf(stderr, "Preserving data "); | |
1044 | if (block_seek != 0) | |
1045 | fprintf(stderr, "0x%x - 0x%lx", 0, block_seek - 1); | |
1046 | if (block_seek + count != write_total) { | |
1047 | if (block_seek != 0) | |
1048 | fprintf(stderr, " and "); | |
81c878dd MN |
1049 | fprintf(stderr, "0x%lx - 0x%lx", |
1050 | (unsigned long) block_seek + count, | |
1051 | (unsigned long) write_total - 1); | |
74620e1c JH |
1052 | } |
1053 | fprintf(stderr, "\n"); | |
1054 | #endif | |
56086921 GL |
1055 | /* Overwrite the old environment */ |
1056 | memcpy (data + block_seek, buf, count); | |
1057 | } else { | |
1058 | /* | |
1059 | * We get here, iff offset is block-aligned and count is a | |
1060 | * multiple of blocklen - see write_total calculation above | |
1061 | */ | |
1062 | data = buf; | |
1063 | } | |
1064 | ||
ff95e579 | 1065 | if (DEVTYPE(dev) == MTD_NANDFLASH) { |
56086921 GL |
1066 | /* |
1067 | * NAND: calculate which blocks we are writing. We have | |
1068 | * to write one block at a time to skip bad blocks. | |
1069 | */ | |
1070 | erasesize = blocklen; | |
1071 | } else { | |
1072 | erasesize = erase_len; | |
1073 | } | |
1074 | ||
1075 | erase.length = erasesize; | |
1076 | ||
9eeaa8e6 | 1077 | /* This only runs once on NOR flash and SPI-dataflash */ |
56086921 | 1078 | while (processed < write_total) { |
ff95e579 | 1079 | rc = flash_bad_block(fd, DEVTYPE(dev), blockstart); |
56086921 GL |
1080 | if (rc < 0) /* block test failed */ |
1081 | return rc; | |
1082 | ||
e2c9351d | 1083 | if (blockstart + erasesize > environment_end(dev)) { |
56086921 GL |
1084 | fprintf (stderr, "End of range reached, aborting\n"); |
1085 | return -1; | |
6aff3115 | 1086 | } |
56086921 GL |
1087 | |
1088 | if (rc) { /* block is bad */ | |
1089 | blockstart += blocklen; | |
1090 | continue; | |
1091 | } | |
1092 | ||
ff95e579 | 1093 | if (DEVTYPE(dev) != MTD_ABSENT) { |
e387efbd OM |
1094 | erase.start = blockstart; |
1095 | ioctl(fd, MEMUNLOCK, &erase); | |
1096 | /* These do not need an explicit erase cycle */ | |
ff95e579 | 1097 | if (DEVTYPE(dev) != MTD_DATAFLASH) |
e387efbd OM |
1098 | if (ioctl(fd, MEMERASE, &erase) != 0) { |
1099 | fprintf(stderr, | |
1100 | "MTD erase error on %s: %s\n", | |
1101 | DEVNAME(dev), strerror(errno)); | |
1102 | return -1; | |
1103 | } | |
1104 | } | |
56086921 GL |
1105 | |
1106 | if (lseek (fd, blockstart, SEEK_SET) == -1) { | |
6aff3115 | 1107 | fprintf (stderr, |
56086921 GL |
1108 | "Seek error on %s: %s\n", |
1109 | DEVNAME (dev), strerror (errno)); | |
1110 | return -1; | |
6aff3115 | 1111 | } |
56086921 GL |
1112 | |
1113 | #ifdef DEBUG | |
81c878dd MN |
1114 | fprintf(stderr, "Write 0x%llx bytes at 0x%llx\n", |
1115 | (unsigned long long) erasesize, | |
1116 | (unsigned long long) blockstart); | |
56086921 GL |
1117 | #endif |
1118 | if (write (fd, data + processed, erasesize) != erasesize) { | |
1119 | fprintf (stderr, "Write error on %s: %s\n", | |
1120 | DEVNAME (dev), strerror (errno)); | |
1121 | return -1; | |
6aff3115 | 1122 | } |
56086921 | 1123 | |
ff95e579 | 1124 | if (DEVTYPE(dev) != MTD_ABSENT) |
e387efbd | 1125 | ioctl(fd, MEMLOCK, &erase); |
56086921 | 1126 | |
4b774ff1 | 1127 | processed += erasesize; |
56086921 | 1128 | block_seek = 0; |
4b774ff1 | 1129 | blockstart += erasesize; |
56086921 GL |
1130 | } |
1131 | ||
1132 | if (write_total > count) | |
1133 | free (data); | |
1134 | ||
1135 | return processed; | |
1136 | } | |
1137 | ||
1138 | /* | |
1139 | * Set obsolete flag at offset - NOR flash only | |
1140 | */ | |
1141 | static int flash_flag_obsolete (int dev, int fd, off_t offset) | |
1142 | { | |
1143 | int rc; | |
0aef7bc7 | 1144 | struct erase_info_user erase; |
56086921 | 1145 | |
0aef7bc7 DZ |
1146 | erase.start = DEVOFFSET (dev); |
1147 | erase.length = DEVESIZE (dev); | |
56086921 GL |
1148 | /* This relies on the fact, that obsolete_flag == 0 */ |
1149 | rc = lseek (fd, offset, SEEK_SET); | |
1150 | if (rc < 0) { | |
1151 | fprintf (stderr, "Cannot seek to set the flag on %s \n", | |
1152 | DEVNAME (dev)); | |
1153 | return rc; | |
1154 | } | |
0aef7bc7 | 1155 | ioctl (fd, MEMUNLOCK, &erase); |
56086921 | 1156 | rc = write (fd, &obsolete_flag, sizeof (obsolete_flag)); |
0aef7bc7 | 1157 | ioctl (fd, MEMLOCK, &erase); |
56086921 GL |
1158 | if (rc < 0) |
1159 | perror ("Could not set obsolete flag"); | |
1160 | ||
1161 | return rc; | |
1162 | } | |
1163 | ||
1164 | static int flash_write (int fd_current, int fd_target, int dev_target) | |
1165 | { | |
1166 | int rc; | |
1167 | ||
1168 | switch (environment.flag_scheme) { | |
1169 | case FLAG_NONE: | |
1170 | break; | |
1171 | case FLAG_INCREMENTAL: | |
1172 | (*environment.flags)++; | |
1173 | break; | |
1174 | case FLAG_BOOLEAN: | |
1175 | *environment.flags = active_flag; | |
1176 | break; | |
1177 | default: | |
1178 | fprintf (stderr, "Unimplemented flash scheme %u \n", | |
1179 | environment.flag_scheme); | |
1180 | return -1; | |
1181 | } | |
1182 | ||
1183 | #ifdef DEBUG | |
f4742ca0 | 1184 | fprintf(stderr, "Writing new environment at 0x%llx on %s\n", |
56086921 GL |
1185 | DEVOFFSET (dev_target), DEVNAME (dev_target)); |
1186 | #endif | |
a8a752c0 | 1187 | |
34255b92 LC |
1188 | if (IS_UBI(dev_target)) { |
1189 | if (ubi_update_start(fd_target, CUR_ENVSIZE) < 0) | |
1190 | return 0; | |
1191 | return ubi_write(fd_target, environment.image, CUR_ENVSIZE); | |
1192 | } | |
1193 | ||
497f2053 | 1194 | rc = flash_write_buf(dev_target, fd_target, environment.image, |
24307d63 | 1195 | CUR_ENVSIZE); |
56086921 GL |
1196 | if (rc < 0) |
1197 | return rc; | |
1198 | ||
1199 | if (environment.flag_scheme == FLAG_BOOLEAN) { | |
1200 | /* Have to set obsolete flag */ | |
1201 | off_t offset = DEVOFFSET (dev_current) + | |
1202 | offsetof (struct env_image_redundant, flags); | |
1203 | #ifdef DEBUG | |
74620e1c | 1204 | fprintf(stderr, |
f4742ca0 | 1205 | "Setting obsolete flag in environment at 0x%llx on %s\n", |
56086921 GL |
1206 | DEVOFFSET (dev_current), DEVNAME (dev_current)); |
1207 | #endif | |
1208 | flash_flag_obsolete (dev_current, fd_current, offset); | |
1209 | } | |
1210 | ||
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | static int flash_read (int fd) | |
1215 | { | |
56086921 GL |
1216 | int rc; |
1217 | ||
34255b92 LC |
1218 | if (IS_UBI(dev_current)) { |
1219 | DEVTYPE(dev_current) = MTD_ABSENT; | |
1220 | ||
1221 | return ubi_read(fd, environment.image, CUR_ENVSIZE); | |
1222 | } | |
1223 | ||
497f2053 | 1224 | rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE, |
ff95e579 | 1225 | DEVOFFSET(dev_current)); |
a8a752c0 MV |
1226 | if (rc != CUR_ENVSIZE) |
1227 | return -1; | |
56086921 | 1228 | |
a8a752c0 | 1229 | return 0; |
56086921 GL |
1230 | } |
1231 | ||
1232 | static int flash_io (int mode) | |
1233 | { | |
1234 | int fd_current, fd_target, rc, dev_target; | |
1235 | ||
1236 | /* dev_current: fd_current, erase_current */ | |
1237 | fd_current = open (DEVNAME (dev_current), mode); | |
1238 | if (fd_current < 0) { | |
1239 | fprintf (stderr, | |
1240 | "Can't open %s: %s\n", | |
1241 | DEVNAME (dev_current), strerror (errno)); | |
1242 | return -1; | |
1243 | } | |
1244 | ||
1245 | if (mode == O_RDWR) { | |
d0fb80c3 | 1246 | if (HaveRedundEnv) { |
56086921 GL |
1247 | /* switch to next partition for writing */ |
1248 | dev_target = !dev_current; | |
1249 | /* dev_target: fd_target, erase_target */ | |
1250 | fd_target = open (DEVNAME (dev_target), mode); | |
1251 | if (fd_target < 0) { | |
d0fb80c3 | 1252 | fprintf (stderr, |
56086921 GL |
1253 | "Can't open %s: %s\n", |
1254 | DEVNAME (dev_target), | |
1255 | strerror (errno)); | |
1256 | rc = -1; | |
1257 | goto exit; | |
d0fb80c3 | 1258 | } |
56086921 GL |
1259 | } else { |
1260 | dev_target = dev_current; | |
1261 | fd_target = fd_current; | |
6aff3115 | 1262 | } |
56086921 GL |
1263 | |
1264 | rc = flash_write (fd_current, fd_target, dev_target); | |
1265 | ||
40fe89c6 LM |
1266 | if (fsync(fd_current) && |
1267 | !(errno == EINVAL || errno == EROFS)) { | |
7e99e14d MH |
1268 | fprintf (stderr, |
1269 | "fsync failed on %s: %s\n", | |
1270 | DEVNAME (dev_current), strerror (errno)); | |
1271 | } | |
1272 | ||
d0fb80c3 | 1273 | if (HaveRedundEnv) { |
40fe89c6 LM |
1274 | if (fsync(fd_target) && |
1275 | !(errno == EINVAL || errno == EROFS)) { | |
7e99e14d MH |
1276 | fprintf (stderr, |
1277 | "fsync failed on %s: %s\n", | |
1278 | DEVNAME (dev_current), strerror (errno)); | |
1279 | } | |
1280 | ||
56086921 | 1281 | if (close (fd_target)) { |
d0fb80c3 | 1282 | fprintf (stderr, |
4a6fd34b | 1283 | "I/O error on %s: %s\n", |
56086921 | 1284 | DEVNAME (dev_target), |
4a6fd34b | 1285 | strerror (errno)); |
56086921 | 1286 | rc = -1; |
d0fb80c3 | 1287 | } |
6aff3115 | 1288 | } |
6aff3115 | 1289 | } else { |
56086921 | 1290 | rc = flash_read (fd_current); |
6aff3115 WD |
1291 | } |
1292 | ||
56086921 GL |
1293 | exit: |
1294 | if (close (fd_current)) { | |
6aff3115 | 1295 | fprintf (stderr, |
56086921 GL |
1296 | "I/O error on %s: %s\n", |
1297 | DEVNAME (dev_current), strerror (errno)); | |
1298 | return -1; | |
6aff3115 WD |
1299 | } |
1300 | ||
56086921 | 1301 | return rc; |
6aff3115 WD |
1302 | } |
1303 | ||
6aff3115 WD |
1304 | /* |
1305 | * Prevent confusion if running from erased flash memory | |
1306 | */ | |
81974f44 | 1307 | int fw_env_open(struct env_opts *opts) |
6aff3115 | 1308 | { |
56086921 | 1309 | int crc0, crc0_ok; |
735eb0f0 | 1310 | unsigned char flag0; |
33f0086c | 1311 | void *addr0 = NULL; |
56086921 | 1312 | |
6aff3115 | 1313 | int crc1, crc1_ok; |
735eb0f0 | 1314 | unsigned char flag1; |
33f0086c | 1315 | void *addr1 = NULL; |
d0fb80c3 | 1316 | |
a8a752c0 MV |
1317 | int ret; |
1318 | ||
56086921 GL |
1319 | struct env_image_single *single; |
1320 | struct env_image_redundant *redundant; | |
6aff3115 | 1321 | |
14070e69 AF |
1322 | if (!opts) |
1323 | opts = &default_opts; | |
1324 | ||
81974f44 | 1325 | if (parse_config(opts)) /* should fill envdevices */ |
33f0086c | 1326 | return -EINVAL; |
4a6fd34b | 1327 | |
497f2053 | 1328 | addr0 = calloc(1, CUR_ENVSIZE); |
56086921 | 1329 | if (addr0 == NULL) { |
497f2053 | 1330 | fprintf(stderr, |
4a6fd34b | 1331 | "Not enough memory for environment (%ld bytes)\n", |
497f2053 | 1332 | CUR_ENVSIZE); |
33f0086c SB |
1333 | ret = -ENOMEM; |
1334 | goto open_cleanup; | |
d0fb80c3 | 1335 | } |
4a6fd34b | 1336 | |
d0fb80c3 | 1337 | /* read environment from FLASH to local buffer */ |
56086921 GL |
1338 | environment.image = addr0; |
1339 | ||
1340 | if (HaveRedundEnv) { | |
1341 | redundant = addr0; | |
1342 | environment.crc = &redundant->crc; | |
1343 | environment.flags = &redundant->flags; | |
1344 | environment.data = redundant->data; | |
1345 | } else { | |
1346 | single = addr0; | |
1347 | environment.crc = &single->crc; | |
1348 | environment.flags = NULL; | |
1349 | environment.data = single->data; | |
d0fb80c3 | 1350 | } |
4a6fd34b | 1351 | |
56086921 | 1352 | dev_current = 0; |
33f0086c SB |
1353 | if (flash_io(O_RDONLY)) { |
1354 | ret = -EIO; | |
1355 | goto open_cleanup; | |
1356 | } | |
56086921 GL |
1357 | |
1358 | crc0 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE); | |
a8a752c0 | 1359 | |
56086921 | 1360 | crc0_ok = (crc0 == *environment.crc); |
d0fb80c3 | 1361 | if (!HaveRedundEnv) { |
56086921 | 1362 | if (!crc0_ok) { |
4a6fd34b WD |
1363 | fprintf (stderr, |
1364 | "Warning: Bad CRC, using default environment\n"); | |
f07217c9 | 1365 | memcpy(environment.data, default_environment, sizeof default_environment); |
6aff3115 | 1366 | } |
d0fb80c3 | 1367 | } else { |
56086921 | 1368 | flag0 = *environment.flags; |
4a6fd34b | 1369 | |
56086921 | 1370 | dev_current = 1; |
497f2053 | 1371 | addr1 = calloc(1, CUR_ENVSIZE); |
56086921 | 1372 | if (addr1 == NULL) { |
497f2053 | 1373 | fprintf(stderr, |
4a6fd34b | 1374 | "Not enough memory for environment (%ld bytes)\n", |
497f2053 | 1375 | CUR_ENVSIZE); |
33f0086c SB |
1376 | ret = -ENOMEM; |
1377 | goto open_cleanup; | |
4a6fd34b | 1378 | } |
56086921 | 1379 | redundant = addr1; |
4a6fd34b | 1380 | |
56086921 GL |
1381 | /* |
1382 | * have to set environment.image for flash_read(), careful - | |
1383 | * other pointers in environment still point inside addr0 | |
1384 | */ | |
1385 | environment.image = addr1; | |
33f0086c SB |
1386 | if (flash_io(O_RDONLY)) { |
1387 | ret = -EIO; | |
1388 | goto open_cleanup; | |
1389 | } | |
56086921 GL |
1390 | |
1391 | /* Check flag scheme compatibility */ | |
1392 | if (DEVTYPE(dev_current) == MTD_NORFLASH && | |
1393 | DEVTYPE(!dev_current) == MTD_NORFLASH) { | |
1394 | environment.flag_scheme = FLAG_BOOLEAN; | |
1395 | } else if (DEVTYPE(dev_current) == MTD_NANDFLASH && | |
1396 | DEVTYPE(!dev_current) == MTD_NANDFLASH) { | |
1397 | environment.flag_scheme = FLAG_INCREMENTAL; | |
9eeaa8e6 RB |
1398 | } else if (DEVTYPE(dev_current) == MTD_DATAFLASH && |
1399 | DEVTYPE(!dev_current) == MTD_DATAFLASH) { | |
1400 | environment.flag_scheme = FLAG_BOOLEAN; | |
785881f7 JH |
1401 | } else if (DEVTYPE(dev_current) == MTD_UBIVOLUME && |
1402 | DEVTYPE(!dev_current) == MTD_UBIVOLUME) { | |
1403 | environment.flag_scheme = FLAG_INCREMENTAL; | |
23ef62d7 | 1404 | } else if (DEVTYPE(dev_current) == MTD_ABSENT && |
34255b92 LC |
1405 | DEVTYPE(!dev_current) == MTD_ABSENT && |
1406 | IS_UBI(dev_current) == IS_UBI(!dev_current)) { | |
23ef62d7 | 1407 | environment.flag_scheme = FLAG_INCREMENTAL; |
56086921 GL |
1408 | } else { |
1409 | fprintf (stderr, "Incompatible flash types!\n"); | |
33f0086c SB |
1410 | ret = -EINVAL; |
1411 | goto open_cleanup; | |
6aff3115 | 1412 | } |
4a6fd34b | 1413 | |
56086921 | 1414 | crc1 = crc32 (0, (uint8_t *) redundant->data, ENV_SIZE); |
a8a752c0 | 1415 | |
56086921 GL |
1416 | crc1_ok = (crc1 == redundant->crc); |
1417 | flag1 = redundant->flags; | |
1418 | ||
1419 | if (crc0_ok && !crc1_ok) { | |
1420 | dev_current = 0; | |
1421 | } else if (!crc0_ok && crc1_ok) { | |
1422 | dev_current = 1; | |
1423 | } else if (!crc0_ok && !crc1_ok) { | |
4a6fd34b WD |
1424 | fprintf (stderr, |
1425 | "Warning: Bad CRC, using default environment\n"); | |
56086921 GL |
1426 | memcpy (environment.data, default_environment, |
1427 | sizeof default_environment); | |
1428 | dev_current = 0; | |
1429 | } else { | |
1430 | switch (environment.flag_scheme) { | |
1431 | case FLAG_BOOLEAN: | |
1432 | if (flag0 == active_flag && | |
1433 | flag1 == obsolete_flag) { | |
1434 | dev_current = 0; | |
1435 | } else if (flag0 == obsolete_flag && | |
1436 | flag1 == active_flag) { | |
1437 | dev_current = 1; | |
1438 | } else if (flag0 == flag1) { | |
1439 | dev_current = 0; | |
1440 | } else if (flag0 == 0xFF) { | |
1441 | dev_current = 0; | |
1442 | } else if (flag1 == 0xFF) { | |
1443 | dev_current = 1; | |
1444 | } else { | |
1445 | dev_current = 0; | |
1446 | } | |
1447 | break; | |
1448 | case FLAG_INCREMENTAL: | |
735eb0f0 | 1449 | if (flag0 == 255 && flag1 == 0) |
56086921 GL |
1450 | dev_current = 1; |
1451 | else if ((flag1 == 255 && flag0 == 0) || | |
735eb0f0 | 1452 | flag0 >= flag1) |
56086921 | 1453 | dev_current = 0; |
735eb0f0 JP |
1454 | else /* flag1 > flag0 */ |
1455 | dev_current = 1; | |
56086921 GL |
1456 | break; |
1457 | default: | |
1458 | fprintf (stderr, "Unknown flag scheme %u \n", | |
1459 | environment.flag_scheme); | |
1460 | return -1; | |
1461 | } | |
1462 | } | |
1463 | ||
1464 | /* | |
1465 | * If we are reading, we don't need the flag and the CRC any | |
1466 | * more, if we are writing, we will re-calculate CRC and update | |
1467 | * flags before writing out | |
1468 | */ | |
1469 | if (dev_current) { | |
1470 | environment.image = addr1; | |
1471 | environment.crc = &redundant->crc; | |
1472 | environment.flags = &redundant->flags; | |
1473 | environment.data = redundant->data; | |
1474 | free (addr0); | |
1475 | } else { | |
1476 | environment.image = addr0; | |
1477 | /* Other pointers are already set */ | |
4a6fd34b | 1478 | free (addr1); |
6aff3115 | 1479 | } |
74620e1c JH |
1480 | #ifdef DEBUG |
1481 | fprintf(stderr, "Selected env in %s\n", DEVNAME(dev_current)); | |
1482 | #endif | |
6aff3115 | 1483 | } |
56086921 | 1484 | return 0; |
33f0086c SB |
1485 | |
1486 | open_cleanup: | |
1487 | if (addr0) | |
1488 | free(addr0); | |
1489 | ||
1490 | if (addr1) | |
1491 | free(addr0); | |
1492 | ||
1493 | return ret; | |
1494 | } | |
1495 | ||
1496 | /* | |
1497 | * Simply free allocated buffer with environment | |
1498 | */ | |
1499 | int fw_env_close(struct env_opts *opts) | |
1500 | { | |
1501 | if (environment.image) | |
1502 | free(environment.image); | |
1503 | ||
1504 | environment.image = NULL; | |
1505 | ||
1506 | return 0; | |
6aff3115 WD |
1507 | } |
1508 | ||
14fb5b25 SA |
1509 | static int check_device_config(int dev) |
1510 | { | |
1511 | struct stat st; | |
34255b92 | 1512 | int32_t lnum = 0; |
14fb5b25 SA |
1513 | int fd, rc = 0; |
1514 | ||
34255b92 LC |
1515 | /* Fills in IS_UBI(), converts DEVNAME() with ubi volume name */ |
1516 | ubi_check_dev(dev); | |
1517 | ||
14fb5b25 SA |
1518 | fd = open(DEVNAME(dev), O_RDONLY); |
1519 | if (fd < 0) { | |
1520 | fprintf(stderr, | |
1521 | "Cannot open %s: %s\n", | |
1522 | DEVNAME(dev), strerror(errno)); | |
1523 | return -1; | |
1524 | } | |
1525 | ||
1526 | rc = fstat(fd, &st); | |
1527 | if (rc < 0) { | |
1528 | fprintf(stderr, "Cannot stat the file %s\n", | |
1529 | DEVNAME(dev)); | |
1530 | goto err; | |
1531 | } | |
1532 | ||
34255b92 LC |
1533 | if (IS_UBI(dev)) { |
1534 | rc = ioctl(fd, UBI_IOCEBISMAP, &lnum); | |
1535 | if (rc < 0) { | |
1536 | fprintf(stderr, "Cannot get UBI information for %s\n", | |
1537 | DEVNAME(dev)); | |
1538 | goto err; | |
1539 | } | |
1540 | } else if (S_ISCHR(st.st_mode)) { | |
14fb5b25 SA |
1541 | struct mtd_info_user mtdinfo; |
1542 | rc = ioctl(fd, MEMGETINFO, &mtdinfo); | |
1543 | if (rc < 0) { | |
1544 | fprintf(stderr, "Cannot get MTD information for %s\n", | |
1545 | DEVNAME(dev)); | |
1546 | goto err; | |
1547 | } | |
1548 | if (mtdinfo.type != MTD_NORFLASH && | |
1549 | mtdinfo.type != MTD_NANDFLASH && | |
1550 | mtdinfo.type != MTD_DATAFLASH && | |
1551 | mtdinfo.type != MTD_UBIVOLUME) { | |
1552 | fprintf(stderr, "Unsupported flash type %u on %s\n", | |
1553 | mtdinfo.type, DEVNAME(dev)); | |
1554 | goto err; | |
1555 | } | |
1556 | DEVTYPE(dev) = mtdinfo.type; | |
333ee16d MK |
1557 | if (DEVESIZE(dev) == 0) |
1558 | /* Assume the erase size is the same as the env-size */ | |
1559 | DEVESIZE(dev) = ENVSIZE(dev); | |
14fb5b25 | 1560 | } else { |
f4742ca0 | 1561 | uint64_t size; |
14fb5b25 | 1562 | DEVTYPE(dev) = MTD_ABSENT; |
333ee16d MK |
1563 | if (DEVESIZE(dev) == 0) |
1564 | /* Assume the erase size to be 512 bytes */ | |
1565 | DEVESIZE(dev) = 0x200; | |
f4742ca0 SA |
1566 | |
1567 | /* | |
1568 | * Check for negative offsets, treat it as backwards offset | |
1569 | * from the end of the block device | |
1570 | */ | |
1571 | if (DEVOFFSET(dev) < 0) { | |
1572 | rc = ioctl(fd, BLKGETSIZE64, &size); | |
1573 | if (rc < 0) { | |
1574 | fprintf(stderr, "Could not get block device size on %s\n", | |
1575 | DEVNAME(dev)); | |
1576 | goto err; | |
1577 | } | |
1578 | ||
1579 | DEVOFFSET(dev) = DEVOFFSET(dev) + size; | |
1580 | #ifdef DEBUG | |
1581 | fprintf(stderr, "Calculated device offset 0x%llx on %s\n", | |
1582 | DEVOFFSET(dev), DEVNAME(dev)); | |
1583 | #endif | |
1584 | } | |
14fb5b25 SA |
1585 | } |
1586 | ||
333ee16d MK |
1587 | if (ENVSECTORS(dev) == 0) |
1588 | /* Assume enough sectors to cover the environment */ | |
1589 | ENVSECTORS(dev) = DIV_ROUND_UP(ENVSIZE(dev), DEVESIZE(dev)); | |
1590 | ||
1591 | if (DEVOFFSET(dev) % DEVESIZE(dev) != 0) { | |
1592 | fprintf(stderr, "Environment does not start on (erase) block boundary\n"); | |
1593 | errno = EINVAL; | |
1594 | return -1; | |
1595 | } | |
1596 | ||
1597 | if (ENVSIZE(dev) > ENVSECTORS(dev) * DEVESIZE(dev)) { | |
1598 | fprintf(stderr, "Environment does not fit into available sectors\n"); | |
1599 | errno = EINVAL; | |
1600 | return -1; | |
1601 | } | |
1602 | ||
14fb5b25 SA |
1603 | err: |
1604 | close(fd); | |
1605 | return rc; | |
1606 | } | |
6aff3115 | 1607 | |
81974f44 | 1608 | static int parse_config(struct env_opts *opts) |
6aff3115 | 1609 | { |
14fb5b25 | 1610 | int rc; |
6aff3115 | 1611 | |
14070e69 AF |
1612 | if (!opts) |
1613 | opts = &default_opts; | |
925c97c2 | 1614 | |
14070e69 | 1615 | #if defined(CONFIG_FILE) |
d0fb80c3 | 1616 | /* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */ |
81974f44 | 1617 | if (get_config(opts->config_file)) { |
371ee137 | 1618 | fprintf(stderr, "Cannot parse config file '%s': %m\n", |
81974f44 | 1619 | opts->config_file); |
56086921 | 1620 | return -1; |
6aff3115 | 1621 | } |
d0fb80c3 | 1622 | #else |
229695fe | 1623 | DEVNAME (0) = DEVICE1_NAME; |
4a6fd34b WD |
1624 | DEVOFFSET (0) = DEVICE1_OFFSET; |
1625 | ENVSIZE (0) = ENV1_SIZE; | |
333ee16d MK |
1626 | |
1627 | /* Set defaults for DEVESIZE, ENVSECTORS later once we | |
1628 | * know DEVTYPE | |
1629 | */ | |
9eeaa8e6 | 1630 | #ifdef DEVICE1_ESIZE |
4a6fd34b | 1631 | DEVESIZE (0) = DEVICE1_ESIZE; |
9eeaa8e6 RB |
1632 | #endif |
1633 | #ifdef DEVICE1_ENVSECTORS | |
56086921 | 1634 | ENVSECTORS (0) = DEVICE1_ENVSECTORS; |
9eeaa8e6 RB |
1635 | #endif |
1636 | ||
6aff3115 | 1637 | #ifdef HAVE_REDUND |
229695fe | 1638 | DEVNAME (1) = DEVICE2_NAME; |
4a6fd34b WD |
1639 | DEVOFFSET (1) = DEVICE2_OFFSET; |
1640 | ENVSIZE (1) = ENV2_SIZE; | |
333ee16d MK |
1641 | |
1642 | /* Set defaults for DEVESIZE, ENVSECTORS later once we | |
1643 | * know DEVTYPE | |
1644 | */ | |
9eeaa8e6 | 1645 | #ifdef DEVICE2_ESIZE |
4a6fd34b | 1646 | DEVESIZE (1) = DEVICE2_ESIZE; |
9eeaa8e6 RB |
1647 | #endif |
1648 | #ifdef DEVICE2_ENVSECTORS | |
56086921 | 1649 | ENVSECTORS (1) = DEVICE2_ENVSECTORS; |
9eeaa8e6 | 1650 | #endif |
d0fb80c3 | 1651 | HaveRedundEnv = 1; |
6aff3115 | 1652 | #endif |
d0fb80c3 | 1653 | #endif |
14fb5b25 SA |
1654 | rc = check_device_config(0); |
1655 | if (rc < 0) | |
1656 | return rc; | |
4a6fd34b | 1657 | |
14fb5b25 SA |
1658 | if (HaveRedundEnv) { |
1659 | rc = check_device_config(1); | |
1660 | if (rc < 0) | |
1661 | return rc; | |
f71cee4b | 1662 | |
14fb5b25 | 1663 | if (ENVSIZE(0) != ENVSIZE(1)) { |
14fb5b25 | 1664 | fprintf(stderr, |
490365c3 AF |
1665 | "Redundant environments have unequal size"); |
1666 | return -1; | |
14fb5b25 | 1667 | } |
f71cee4b AF |
1668 | } |
1669 | ||
1670 | usable_envsize = CUR_ENVSIZE - sizeof(uint32_t); | |
1671 | if (HaveRedundEnv) | |
1672 | usable_envsize -= sizeof(char); | |
1673 | ||
6aff3115 WD |
1674 | return 0; |
1675 | } | |
d0fb80c3 WD |
1676 | |
1677 | #if defined(CONFIG_FILE) | |
1678 | static int get_config (char *fname) | |
1679 | { | |
1680 | FILE *fp; | |
1681 | int i = 0; | |
1682 | int rc; | |
1683 | char dump[128]; | |
229695fe | 1684 | char *devname; |
d0fb80c3 | 1685 | |
56086921 GL |
1686 | fp = fopen (fname, "r"); |
1687 | if (fp == NULL) | |
1688 | return -1; | |
d0fb80c3 | 1689 | |
56086921 | 1690 | while (i < 2 && fgets (dump, sizeof (dump), fp)) { |
d0fb80c3 | 1691 | /* Skip incomplete conversions and comment strings */ |
56086921 | 1692 | if (dump[0] == '#') |
d0fb80c3 | 1693 | continue; |
56086921 | 1694 | |
f4742ca0 SA |
1695 | rc = sscanf(dump, "%ms %lli %lx %lx %lx", |
1696 | &devname, | |
1697 | &DEVOFFSET(i), | |
1698 | &ENVSIZE(i), | |
1699 | &DEVESIZE(i), | |
1700 | &ENVSECTORS(i)); | |
56086921 | 1701 | |
9eeaa8e6 | 1702 | if (rc < 3) |
56086921 GL |
1703 | continue; |
1704 | ||
229695fe TR |
1705 | DEVNAME(i) = devname; |
1706 | ||
333ee16d MK |
1707 | /* Set defaults for DEVESIZE, ENVSECTORS later once we |
1708 | * know DEVTYPE | |
1709 | */ | |
d0fb80c3 WD |
1710 | |
1711 | i++; | |
1712 | } | |
4a6fd34b WD |
1713 | fclose (fp); |
1714 | ||
d0fb80c3 | 1715 | HaveRedundEnv = i - 1; |
4a6fd34b | 1716 | if (!i) { /* No valid entries found */ |
d0fb80c3 | 1717 | errno = EINVAL; |
56086921 | 1718 | return -1; |
d0fb80c3 WD |
1719 | } else |
1720 | return 0; | |
1721 | } | |
1722 | #endif |