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1 | /* | |
2 | * Copyright 2010-2011 Calxeda, Inc. | |
3 | * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | ||
8 | #include <common.h> | |
9 | #include <command.h> | |
10 | #include <malloc.h> | |
11 | #include <mapmem.h> | |
12 | #include <linux/string.h> | |
13 | #include <linux/ctype.h> | |
14 | #include <errno.h> | |
15 | #include <linux/list.h> | |
16 | #include <fs.h> | |
17 | #include <asm/io.h> | |
18 | ||
19 | #include "menu.h" | |
20 | #include "cli.h" | |
21 | ||
22 | #define MAX_TFTP_PATH_LEN 127 | |
23 | ||
24 | const char *pxe_default_paths[] = { | |
25 | #ifdef CONFIG_SYS_SOC | |
26 | "default-" CONFIG_SYS_ARCH "-" CONFIG_SYS_SOC, | |
27 | #endif | |
28 | "default-" CONFIG_SYS_ARCH, | |
29 | "default", | |
30 | NULL | |
31 | }; | |
32 | ||
33 | static bool is_pxe; | |
34 | ||
35 | /* | |
36 | * Like getenv, but prints an error if envvar isn't defined in the | |
37 | * environment. It always returns what getenv does, so it can be used in | |
38 | * place of getenv without changing error handling otherwise. | |
39 | */ | |
40 | static char *from_env(const char *envvar) | |
41 | { | |
42 | char *ret; | |
43 | ||
44 | ret = getenv(envvar); | |
45 | ||
46 | if (!ret) | |
47 | printf("missing environment variable: %s\n", envvar); | |
48 | ||
49 | return ret; | |
50 | } | |
51 | ||
52 | #ifdef CONFIG_CMD_NET | |
53 | /* | |
54 | * Convert an ethaddr from the environment to the format used by pxelinux | |
55 | * filenames based on mac addresses. Convert's ':' to '-', and adds "01-" to | |
56 | * the beginning of the ethernet address to indicate a hardware type of | |
57 | * Ethernet. Also converts uppercase hex characters into lowercase, to match | |
58 | * pxelinux's behavior. | |
59 | * | |
60 | * Returns 1 for success, -ENOENT if 'ethaddr' is undefined in the | |
61 | * environment, or some other value < 0 on error. | |
62 | */ | |
63 | static int format_mac_pxe(char *outbuf, size_t outbuf_len) | |
64 | { | |
65 | uchar ethaddr[6]; | |
66 | ||
67 | if (outbuf_len < 21) { | |
68 | printf("outbuf is too small (%zd < 21)\n", outbuf_len); | |
69 | ||
70 | return -EINVAL; | |
71 | } | |
72 | ||
73 | if (!eth_getenv_enetaddr_by_index("eth", eth_get_dev_index(), | |
74 | ethaddr)) | |
75 | return -ENOENT; | |
76 | ||
77 | sprintf(outbuf, "01-%02x-%02x-%02x-%02x-%02x-%02x", | |
78 | ethaddr[0], ethaddr[1], ethaddr[2], | |
79 | ethaddr[3], ethaddr[4], ethaddr[5]); | |
80 | ||
81 | return 1; | |
82 | } | |
83 | #endif | |
84 | ||
85 | /* | |
86 | * Returns the directory the file specified in the bootfile env variable is | |
87 | * in. If bootfile isn't defined in the environment, return NULL, which should | |
88 | * be interpreted as "don't prepend anything to paths". | |
89 | */ | |
90 | static int get_bootfile_path(const char *file_path, char *bootfile_path, | |
91 | size_t bootfile_path_size) | |
92 | { | |
93 | char *bootfile, *last_slash; | |
94 | size_t path_len = 0; | |
95 | ||
96 | /* Only syslinux allows absolute paths */ | |
97 | if (file_path[0] == '/' && !is_pxe) | |
98 | goto ret; | |
99 | ||
100 | bootfile = from_env("bootfile"); | |
101 | ||
102 | if (!bootfile) | |
103 | goto ret; | |
104 | ||
105 | last_slash = strrchr(bootfile, '/'); | |
106 | ||
107 | if (last_slash == NULL) | |
108 | goto ret; | |
109 | ||
110 | path_len = (last_slash - bootfile) + 1; | |
111 | ||
112 | if (bootfile_path_size < path_len) { | |
113 | printf("bootfile_path too small. (%zd < %zd)\n", | |
114 | bootfile_path_size, path_len); | |
115 | ||
116 | return -1; | |
117 | } | |
118 | ||
119 | strncpy(bootfile_path, bootfile, path_len); | |
120 | ||
121 | ret: | |
122 | bootfile_path[path_len] = '\0'; | |
123 | ||
124 | return 1; | |
125 | } | |
126 | ||
127 | static int (*do_getfile)(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr); | |
128 | ||
129 | #ifdef CONFIG_CMD_NET | |
130 | static int do_get_tftp(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) | |
131 | { | |
132 | char *tftp_argv[] = {"tftp", NULL, NULL, NULL}; | |
133 | ||
134 | tftp_argv[1] = file_addr; | |
135 | tftp_argv[2] = (void *)file_path; | |
136 | ||
137 | if (do_tftpb(cmdtp, 0, 3, tftp_argv)) | |
138 | return -ENOENT; | |
139 | ||
140 | return 1; | |
141 | } | |
142 | #endif | |
143 | ||
144 | static char *fs_argv[5]; | |
145 | ||
146 | static int do_get_ext2(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) | |
147 | { | |
148 | #ifdef CONFIG_CMD_EXT2 | |
149 | fs_argv[0] = "ext2load"; | |
150 | fs_argv[3] = file_addr; | |
151 | fs_argv[4] = (void *)file_path; | |
152 | ||
153 | if (!do_ext2load(cmdtp, 0, 5, fs_argv)) | |
154 | return 1; | |
155 | #endif | |
156 | return -ENOENT; | |
157 | } | |
158 | ||
159 | static int do_get_fat(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) | |
160 | { | |
161 | #ifdef CONFIG_CMD_FAT | |
162 | fs_argv[0] = "fatload"; | |
163 | fs_argv[3] = file_addr; | |
164 | fs_argv[4] = (void *)file_path; | |
165 | ||
166 | if (!do_fat_fsload(cmdtp, 0, 5, fs_argv)) | |
167 | return 1; | |
168 | #endif | |
169 | return -ENOENT; | |
170 | } | |
171 | ||
172 | static int do_get_any(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) | |
173 | { | |
174 | #ifdef CONFIG_CMD_FS_GENERIC | |
175 | fs_argv[0] = "load"; | |
176 | fs_argv[3] = file_addr; | |
177 | fs_argv[4] = (void *)file_path; | |
178 | ||
179 | if (!do_load(cmdtp, 0, 5, fs_argv, FS_TYPE_ANY)) | |
180 | return 1; | |
181 | #endif | |
182 | return -ENOENT; | |
183 | } | |
184 | ||
185 | /* | |
186 | * As in pxelinux, paths to files referenced from files we retrieve are | |
187 | * relative to the location of bootfile. get_relfile takes such a path and | |
188 | * joins it with the bootfile path to get the full path to the target file. If | |
189 | * the bootfile path is NULL, we use file_path as is. | |
190 | * | |
191 | * Returns 1 for success, or < 0 on error. | |
192 | */ | |
193 | static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path, | |
194 | unsigned long file_addr) | |
195 | { | |
196 | size_t path_len; | |
197 | char relfile[MAX_TFTP_PATH_LEN+1]; | |
198 | char addr_buf[18]; | |
199 | int err; | |
200 | ||
201 | err = get_bootfile_path(file_path, relfile, sizeof(relfile)); | |
202 | ||
203 | if (err < 0) | |
204 | return err; | |
205 | ||
206 | path_len = strlen(file_path); | |
207 | path_len += strlen(relfile); | |
208 | ||
209 | if (path_len > MAX_TFTP_PATH_LEN) { | |
210 | printf("Base path too long (%s%s)\n", | |
211 | relfile, | |
212 | file_path); | |
213 | ||
214 | return -ENAMETOOLONG; | |
215 | } | |
216 | ||
217 | strcat(relfile, file_path); | |
218 | ||
219 | printf("Retrieving file: %s\n", relfile); | |
220 | ||
221 | sprintf(addr_buf, "%lx", file_addr); | |
222 | ||
223 | return do_getfile(cmdtp, relfile, addr_buf); | |
224 | } | |
225 | ||
226 | /* | |
227 | * Retrieve the file at 'file_path' to the locate given by 'file_addr'. If | |
228 | * 'bootfile' was specified in the environment, the path to bootfile will be | |
229 | * prepended to 'file_path' and the resulting path will be used. | |
230 | * | |
231 | * Returns 1 on success, or < 0 for error. | |
232 | */ | |
233 | static int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path, | |
234 | unsigned long file_addr) | |
235 | { | |
236 | unsigned long config_file_size; | |
237 | char *tftp_filesize; | |
238 | int err; | |
239 | char *buf; | |
240 | ||
241 | err = get_relfile(cmdtp, file_path, file_addr); | |
242 | ||
243 | if (err < 0) | |
244 | return err; | |
245 | ||
246 | /* | |
247 | * the file comes without a NUL byte at the end, so find out its size | |
248 | * and add the NUL byte. | |
249 | */ | |
250 | tftp_filesize = from_env("filesize"); | |
251 | ||
252 | if (!tftp_filesize) | |
253 | return -ENOENT; | |
254 | ||
255 | if (strict_strtoul(tftp_filesize, 16, &config_file_size) < 0) | |
256 | return -EINVAL; | |
257 | ||
258 | buf = map_sysmem(file_addr + config_file_size, 1); | |
259 | *buf = '\0'; | |
260 | unmap_sysmem(buf); | |
261 | ||
262 | return 1; | |
263 | } | |
264 | ||
265 | #ifdef CONFIG_CMD_NET | |
266 | ||
267 | #define PXELINUX_DIR "pxelinux.cfg/" | |
268 | ||
269 | /* | |
270 | * Retrieves a file in the 'pxelinux.cfg' folder. Since this uses get_pxe_file | |
271 | * to do the hard work, the location of the 'pxelinux.cfg' folder is generated | |
272 | * from the bootfile path, as described above. | |
273 | * | |
274 | * Returns 1 on success or < 0 on error. | |
275 | */ | |
276 | static int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file, | |
277 | unsigned long pxefile_addr_r) | |
278 | { | |
279 | size_t base_len = strlen(PXELINUX_DIR); | |
280 | char path[MAX_TFTP_PATH_LEN+1]; | |
281 | ||
282 | if (base_len + strlen(file) > MAX_TFTP_PATH_LEN) { | |
283 | printf("path (%s%s) too long, skipping\n", | |
284 | PXELINUX_DIR, file); | |
285 | return -ENAMETOOLONG; | |
286 | } | |
287 | ||
288 | sprintf(path, PXELINUX_DIR "%s", file); | |
289 | ||
290 | return get_pxe_file(cmdtp, path, pxefile_addr_r); | |
291 | } | |
292 | ||
293 | /* | |
294 | * Looks for a pxe file with a name based on the pxeuuid environment variable. | |
295 | * | |
296 | * Returns 1 on success or < 0 on error. | |
297 | */ | |
298 | static int pxe_uuid_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r) | |
299 | { | |
300 | char *uuid_str; | |
301 | ||
302 | uuid_str = from_env("pxeuuid"); | |
303 | ||
304 | if (!uuid_str) | |
305 | return -ENOENT; | |
306 | ||
307 | return get_pxelinux_path(cmdtp, uuid_str, pxefile_addr_r); | |
308 | } | |
309 | ||
310 | /* | |
311 | * Looks for a pxe file with a name based on the 'ethaddr' environment | |
312 | * variable. | |
313 | * | |
314 | * Returns 1 on success or < 0 on error. | |
315 | */ | |
316 | static int pxe_mac_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r) | |
317 | { | |
318 | char mac_str[21]; | |
319 | int err; | |
320 | ||
321 | err = format_mac_pxe(mac_str, sizeof(mac_str)); | |
322 | ||
323 | if (err < 0) | |
324 | return err; | |
325 | ||
326 | return get_pxelinux_path(cmdtp, mac_str, pxefile_addr_r); | |
327 | } | |
328 | ||
329 | /* | |
330 | * Looks for pxe files with names based on our IP address. See pxelinux | |
331 | * documentation for details on what these file names look like. We match | |
332 | * that exactly. | |
333 | * | |
334 | * Returns 1 on success or < 0 on error. | |
335 | */ | |
336 | static int pxe_ipaddr_paths(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r) | |
337 | { | |
338 | char ip_addr[9]; | |
339 | int mask_pos, err; | |
340 | ||
341 | sprintf(ip_addr, "%08X", ntohl(net_ip.s_addr)); | |
342 | ||
343 | for (mask_pos = 7; mask_pos >= 0; mask_pos--) { | |
344 | err = get_pxelinux_path(cmdtp, ip_addr, pxefile_addr_r); | |
345 | ||
346 | if (err > 0) | |
347 | return err; | |
348 | ||
349 | ip_addr[mask_pos] = '\0'; | |
350 | } | |
351 | ||
352 | return -ENOENT; | |
353 | } | |
354 | ||
355 | /* | |
356 | * Entry point for the 'pxe get' command. | |
357 | * This Follows pxelinux's rules to download a config file from a tftp server. | |
358 | * The file is stored at the location given by the pxefile_addr_r environment | |
359 | * variable, which must be set. | |
360 | * | |
361 | * UUID comes from pxeuuid env variable, if defined | |
362 | * MAC addr comes from ethaddr env variable, if defined | |
363 | * IP | |
364 | * | |
365 | * see http://syslinux.zytor.com/wiki/index.php/PXELINUX | |
366 | * | |
367 | * Returns 0 on success or 1 on error. | |
368 | */ | |
369 | static int | |
370 | do_pxe_get(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
371 | { | |
372 | char *pxefile_addr_str; | |
373 | unsigned long pxefile_addr_r; | |
374 | int err, i = 0; | |
375 | ||
376 | do_getfile = do_get_tftp; | |
377 | ||
378 | if (argc != 1) | |
379 | return CMD_RET_USAGE; | |
380 | ||
381 | pxefile_addr_str = from_env("pxefile_addr_r"); | |
382 | ||
383 | if (!pxefile_addr_str) | |
384 | return 1; | |
385 | ||
386 | err = strict_strtoul(pxefile_addr_str, 16, | |
387 | (unsigned long *)&pxefile_addr_r); | |
388 | if (err < 0) | |
389 | return 1; | |
390 | ||
391 | /* | |
392 | * Keep trying paths until we successfully get a file we're looking | |
393 | * for. | |
394 | */ | |
395 | if (pxe_uuid_path(cmdtp, pxefile_addr_r) > 0 || | |
396 | pxe_mac_path(cmdtp, pxefile_addr_r) > 0 || | |
397 | pxe_ipaddr_paths(cmdtp, pxefile_addr_r) > 0) { | |
398 | printf("Config file found\n"); | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | while (pxe_default_paths[i]) { | |
404 | if (get_pxelinux_path(cmdtp, pxe_default_paths[i], | |
405 | pxefile_addr_r) > 0) { | |
406 | printf("Config file found\n"); | |
407 | return 0; | |
408 | } | |
409 | i++; | |
410 | } | |
411 | ||
412 | printf("Config file not found\n"); | |
413 | ||
414 | return 1; | |
415 | } | |
416 | #endif | |
417 | ||
418 | /* | |
419 | * Wrapper to make it easier to store the file at file_path in the location | |
420 | * specified by envaddr_name. file_path will be joined to the bootfile path, | |
421 | * if any is specified. | |
422 | * | |
423 | * Returns 1 on success or < 0 on error. | |
424 | */ | |
425 | static int get_relfile_envaddr(cmd_tbl_t *cmdtp, const char *file_path, const char *envaddr_name) | |
426 | { | |
427 | unsigned long file_addr; | |
428 | char *envaddr; | |
429 | ||
430 | envaddr = from_env(envaddr_name); | |
431 | ||
432 | if (!envaddr) | |
433 | return -ENOENT; | |
434 | ||
435 | if (strict_strtoul(envaddr, 16, &file_addr) < 0) | |
436 | return -EINVAL; | |
437 | ||
438 | return get_relfile(cmdtp, file_path, file_addr); | |
439 | } | |
440 | ||
441 | /* | |
442 | * A note on the pxe file parser. | |
443 | * | |
444 | * We're parsing files that use syslinux grammar, which has a few quirks. | |
445 | * String literals must be recognized based on context - there is no | |
446 | * quoting or escaping support. There's also nothing to explicitly indicate | |
447 | * when a label section completes. We deal with that by ending a label | |
448 | * section whenever we see a line that doesn't include. | |
449 | * | |
450 | * As with the syslinux family, this same file format could be reused in the | |
451 | * future for non pxe purposes. The only action it takes during parsing that | |
452 | * would throw this off is handling of include files. It assumes we're using | |
453 | * pxe, and does a tftp download of a file listed as an include file in the | |
454 | * middle of the parsing operation. That could be handled by refactoring it to | |
455 | * take a 'include file getter' function. | |
456 | */ | |
457 | ||
458 | /* | |
459 | * Describes a single label given in a pxe file. | |
460 | * | |
461 | * Create these with the 'label_create' function given below. | |
462 | * | |
463 | * name - the name of the menu as given on the 'menu label' line. | |
464 | * kernel - the path to the kernel file to use for this label. | |
465 | * append - kernel command line to use when booting this label | |
466 | * initrd - path to the initrd to use for this label. | |
467 | * attempted - 0 if we haven't tried to boot this label, 1 if we have. | |
468 | * localboot - 1 if this label specified 'localboot', 0 otherwise. | |
469 | * list - lets these form a list, which a pxe_menu struct will hold. | |
470 | */ | |
471 | struct pxe_label { | |
472 | char num[4]; | |
473 | char *name; | |
474 | char *menu; | |
475 | char *kernel; | |
476 | char *append; | |
477 | char *initrd; | |
478 | char *fdt; | |
479 | char *fdtdir; | |
480 | int ipappend; | |
481 | int attempted; | |
482 | int localboot; | |
483 | int localboot_val; | |
484 | struct list_head list; | |
485 | }; | |
486 | ||
487 | /* | |
488 | * Describes a pxe menu as given via pxe files. | |
489 | * | |
490 | * title - the name of the menu as given by a 'menu title' line. | |
491 | * default_label - the name of the default label, if any. | |
492 | * timeout - time in tenths of a second to wait for a user key-press before | |
493 | * booting the default label. | |
494 | * prompt - if 0, don't prompt for a choice unless the timeout period is | |
495 | * interrupted. If 1, always prompt for a choice regardless of | |
496 | * timeout. | |
497 | * labels - a list of labels defined for the menu. | |
498 | */ | |
499 | struct pxe_menu { | |
500 | char *title; | |
501 | char *default_label; | |
502 | int timeout; | |
503 | int prompt; | |
504 | struct list_head labels; | |
505 | }; | |
506 | ||
507 | /* | |
508 | * Allocates memory for and initializes a pxe_label. This uses malloc, so the | |
509 | * result must be free()'d to reclaim the memory. | |
510 | * | |
511 | * Returns NULL if malloc fails. | |
512 | */ | |
513 | static struct pxe_label *label_create(void) | |
514 | { | |
515 | struct pxe_label *label; | |
516 | ||
517 | label = malloc(sizeof(struct pxe_label)); | |
518 | ||
519 | if (!label) | |
520 | return NULL; | |
521 | ||
522 | memset(label, 0, sizeof(struct pxe_label)); | |
523 | ||
524 | return label; | |
525 | } | |
526 | ||
527 | /* | |
528 | * Free the memory used by a pxe_label, including that used by its name, | |
529 | * kernel, append and initrd members, if they're non NULL. | |
530 | * | |
531 | * So - be sure to only use dynamically allocated memory for the members of | |
532 | * the pxe_label struct, unless you want to clean it up first. These are | |
533 | * currently only created by the pxe file parsing code. | |
534 | */ | |
535 | static void label_destroy(struct pxe_label *label) | |
536 | { | |
537 | if (label->name) | |
538 | free(label->name); | |
539 | ||
540 | if (label->kernel) | |
541 | free(label->kernel); | |
542 | ||
543 | if (label->append) | |
544 | free(label->append); | |
545 | ||
546 | if (label->initrd) | |
547 | free(label->initrd); | |
548 | ||
549 | if (label->fdt) | |
550 | free(label->fdt); | |
551 | ||
552 | if (label->fdtdir) | |
553 | free(label->fdtdir); | |
554 | ||
555 | free(label); | |
556 | } | |
557 | ||
558 | /* | |
559 | * Print a label and its string members if they're defined. | |
560 | * | |
561 | * This is passed as a callback to the menu code for displaying each | |
562 | * menu entry. | |
563 | */ | |
564 | static void label_print(void *data) | |
565 | { | |
566 | struct pxe_label *label = data; | |
567 | const char *c = label->menu ? label->menu : label->name; | |
568 | ||
569 | printf("%s:\t%s\n", label->num, c); | |
570 | } | |
571 | ||
572 | /* | |
573 | * Boot a label that specified 'localboot'. This requires that the 'localcmd' | |
574 | * environment variable is defined. Its contents will be executed as U-Boot | |
575 | * command. If the label specified an 'append' line, its contents will be | |
576 | * used to overwrite the contents of the 'bootargs' environment variable prior | |
577 | * to running 'localcmd'. | |
578 | * | |
579 | * Returns 1 on success or < 0 on error. | |
580 | */ | |
581 | static int label_localboot(struct pxe_label *label) | |
582 | { | |
583 | char *localcmd; | |
584 | ||
585 | localcmd = from_env("localcmd"); | |
586 | ||
587 | if (!localcmd) | |
588 | return -ENOENT; | |
589 | ||
590 | if (label->append) { | |
591 | char bootargs[CONFIG_SYS_CBSIZE]; | |
592 | ||
593 | cli_simple_process_macros(label->append, bootargs); | |
594 | setenv("bootargs", bootargs); | |
595 | } | |
596 | ||
597 | debug("running: %s\n", localcmd); | |
598 | ||
599 | return run_command_list(localcmd, strlen(localcmd), 0); | |
600 | } | |
601 | ||
602 | /* | |
603 | * Boot according to the contents of a pxe_label. | |
604 | * | |
605 | * If we can't boot for any reason, we return. A successful boot never | |
606 | * returns. | |
607 | * | |
608 | * The kernel will be stored in the location given by the 'kernel_addr_r' | |
609 | * environment variable. | |
610 | * | |
611 | * If the label specifies an initrd file, it will be stored in the location | |
612 | * given by the 'ramdisk_addr_r' environment variable. | |
613 | * | |
614 | * If the label specifies an 'append' line, its contents will overwrite that | |
615 | * of the 'bootargs' environment variable. | |
616 | */ | |
617 | static int label_boot(cmd_tbl_t *cmdtp, struct pxe_label *label) | |
618 | { | |
619 | char *bootm_argv[] = { "bootm", NULL, NULL, NULL, NULL }; | |
620 | char initrd_str[22]; | |
621 | char mac_str[29] = ""; | |
622 | char ip_str[68] = ""; | |
623 | int bootm_argc = 2; | |
624 | int len = 0; | |
625 | ulong kernel_addr; | |
626 | void *buf; | |
627 | ||
628 | label_print(label); | |
629 | ||
630 | label->attempted = 1; | |
631 | ||
632 | if (label->localboot) { | |
633 | if (label->localboot_val >= 0) | |
634 | label_localboot(label); | |
635 | return 0; | |
636 | } | |
637 | ||
638 | if (label->kernel == NULL) { | |
639 | printf("No kernel given, skipping %s\n", | |
640 | label->name); | |
641 | return 1; | |
642 | } | |
643 | ||
644 | if (label->initrd) { | |
645 | if (get_relfile_envaddr(cmdtp, label->initrd, "ramdisk_addr_r") < 0) { | |
646 | printf("Skipping %s for failure retrieving initrd\n", | |
647 | label->name); | |
648 | return 1; | |
649 | } | |
650 | ||
651 | bootm_argv[2] = initrd_str; | |
652 | strcpy(bootm_argv[2], getenv("ramdisk_addr_r")); | |
653 | strcat(bootm_argv[2], ":"); | |
654 | strcat(bootm_argv[2], getenv("filesize")); | |
655 | } | |
656 | ||
657 | if (get_relfile_envaddr(cmdtp, label->kernel, "kernel_addr_r") < 0) { | |
658 | printf("Skipping %s for failure retrieving kernel\n", | |
659 | label->name); | |
660 | return 1; | |
661 | } | |
662 | ||
663 | if (label->ipappend & 0x1) { | |
664 | sprintf(ip_str, " ip=%s:%s:%s:%s", | |
665 | getenv("ipaddr"), getenv("serverip"), | |
666 | getenv("gatewayip"), getenv("netmask")); | |
667 | } | |
668 | ||
669 | #ifdef CONFIG_CMD_NET | |
670 | if (label->ipappend & 0x2) { | |
671 | int err; | |
672 | strcpy(mac_str, " BOOTIF="); | |
673 | err = format_mac_pxe(mac_str + 8, sizeof(mac_str) - 8); | |
674 | if (err < 0) | |
675 | mac_str[0] = '\0'; | |
676 | } | |
677 | #endif | |
678 | ||
679 | if ((label->ipappend & 0x3) || label->append) { | |
680 | char bootargs[CONFIG_SYS_CBSIZE] = ""; | |
681 | char finalbootargs[CONFIG_SYS_CBSIZE]; | |
682 | ||
683 | if (strlen(label->append ?: "") + | |
684 | strlen(ip_str) + strlen(mac_str) + 1 > sizeof(bootargs)) { | |
685 | printf("bootarg overflow %zd+%zd+%zd+1 > %zd\n", | |
686 | strlen(label->append ?: ""), | |
687 | strlen(ip_str), strlen(mac_str), | |
688 | sizeof(bootargs)); | |
689 | return 1; | |
690 | } | |
691 | ||
692 | if (label->append) | |
693 | strcpy(bootargs, label->append); | |
694 | strcat(bootargs, ip_str); | |
695 | strcat(bootargs, mac_str); | |
696 | ||
697 | cli_simple_process_macros(bootargs, finalbootargs); | |
698 | setenv("bootargs", finalbootargs); | |
699 | printf("append: %s\n", finalbootargs); | |
700 | } | |
701 | ||
702 | bootm_argv[1] = getenv("kernel_addr_r"); | |
703 | ||
704 | /* | |
705 | * fdt usage is optional: | |
706 | * It handles the following scenarios. All scenarios are exclusive | |
707 | * | |
708 | * Scenario 1: If fdt_addr_r specified and "fdt" label is defined in | |
709 | * pxe file, retrieve fdt blob from server. Pass fdt_addr_r to bootm, | |
710 | * and adjust argc appropriately. | |
711 | * | |
712 | * Scenario 2: If there is an fdt_addr specified, pass it along to | |
713 | * bootm, and adjust argc appropriately. | |
714 | * | |
715 | * Scenario 3: fdt blob is not available. | |
716 | */ | |
717 | bootm_argv[3] = getenv("fdt_addr_r"); | |
718 | ||
719 | /* if fdt label is defined then get fdt from server */ | |
720 | if (bootm_argv[3]) { | |
721 | char *fdtfile = NULL; | |
722 | char *fdtfilefree = NULL; | |
723 | ||
724 | if (label->fdt) { | |
725 | fdtfile = label->fdt; | |
726 | } else if (label->fdtdir) { | |
727 | char *f1, *f2, *f3, *f4, *slash; | |
728 | ||
729 | f1 = getenv("fdtfile"); | |
730 | if (f1) { | |
731 | f2 = ""; | |
732 | f3 = ""; | |
733 | f4 = ""; | |
734 | } else { | |
735 | /* | |
736 | * For complex cases where this code doesn't | |
737 | * generate the correct filename, the board | |
738 | * code should set $fdtfile during early boot, | |
739 | * or the boot scripts should set $fdtfile | |
740 | * before invoking "pxe" or "sysboot". | |
741 | */ | |
742 | f1 = getenv("soc"); | |
743 | f2 = "-"; | |
744 | f3 = getenv("board"); | |
745 | f4 = ".dtb"; | |
746 | } | |
747 | ||
748 | len = strlen(label->fdtdir); | |
749 | if (!len) | |
750 | slash = "./"; | |
751 | else if (label->fdtdir[len - 1] != '/') | |
752 | slash = "/"; | |
753 | else | |
754 | slash = ""; | |
755 | ||
756 | len = strlen(label->fdtdir) + strlen(slash) + | |
757 | strlen(f1) + strlen(f2) + strlen(f3) + | |
758 | strlen(f4) + 1; | |
759 | fdtfilefree = malloc(len); | |
760 | if (!fdtfilefree) { | |
761 | printf("malloc fail (FDT filename)\n"); | |
762 | return 1; | |
763 | } | |
764 | ||
765 | snprintf(fdtfilefree, len, "%s%s%s%s%s%s", | |
766 | label->fdtdir, slash, f1, f2, f3, f4); | |
767 | fdtfile = fdtfilefree; | |
768 | } | |
769 | ||
770 | if (fdtfile) { | |
771 | int err = get_relfile_envaddr(cmdtp, fdtfile, "fdt_addr_r"); | |
772 | free(fdtfilefree); | |
773 | if (err < 0) { | |
774 | printf("Skipping %s for failure retrieving fdt\n", | |
775 | label->name); | |
776 | return 1; | |
777 | } | |
778 | } else { | |
779 | bootm_argv[3] = NULL; | |
780 | } | |
781 | } | |
782 | ||
783 | if (!bootm_argv[3]) | |
784 | bootm_argv[3] = getenv("fdt_addr"); | |
785 | ||
786 | if (bootm_argv[3]) { | |
787 | if (!bootm_argv[2]) | |
788 | bootm_argv[2] = "-"; | |
789 | bootm_argc = 4; | |
790 | } | |
791 | ||
792 | kernel_addr = genimg_get_kernel_addr(bootm_argv[1]); | |
793 | buf = map_sysmem(kernel_addr, 0); | |
794 | /* Try bootm for legacy and FIT format image */ | |
795 | if (genimg_get_format(buf) != IMAGE_FORMAT_INVALID) | |
796 | do_bootm(cmdtp, 0, bootm_argc, bootm_argv); | |
797 | #ifdef CONFIG_CMD_BOOTI | |
798 | /* Try booting an AArch64 Linux kernel image */ | |
799 | else | |
800 | do_booti(cmdtp, 0, bootm_argc, bootm_argv); | |
801 | #elif defined(CONFIG_CMD_BOOTZ) | |
802 | /* Try booting a Image */ | |
803 | else | |
804 | do_bootz(cmdtp, 0, bootm_argc, bootm_argv); | |
805 | #endif | |
806 | unmap_sysmem(buf); | |
807 | return 1; | |
808 | } | |
809 | ||
810 | /* | |
811 | * Tokens for the pxe file parser. | |
812 | */ | |
813 | enum token_type { | |
814 | T_EOL, | |
815 | T_STRING, | |
816 | T_EOF, | |
817 | T_MENU, | |
818 | T_TITLE, | |
819 | T_TIMEOUT, | |
820 | T_LABEL, | |
821 | T_KERNEL, | |
822 | T_LINUX, | |
823 | T_APPEND, | |
824 | T_INITRD, | |
825 | T_LOCALBOOT, | |
826 | T_DEFAULT, | |
827 | T_PROMPT, | |
828 | T_INCLUDE, | |
829 | T_FDT, | |
830 | T_FDTDIR, | |
831 | T_ONTIMEOUT, | |
832 | T_IPAPPEND, | |
833 | T_INVALID | |
834 | }; | |
835 | ||
836 | /* | |
837 | * A token - given by a value and a type. | |
838 | */ | |
839 | struct token { | |
840 | char *val; | |
841 | enum token_type type; | |
842 | }; | |
843 | ||
844 | /* | |
845 | * Keywords recognized. | |
846 | */ | |
847 | static const struct token keywords[] = { | |
848 | {"menu", T_MENU}, | |
849 | {"title", T_TITLE}, | |
850 | {"timeout", T_TIMEOUT}, | |
851 | {"default", T_DEFAULT}, | |
852 | {"prompt", T_PROMPT}, | |
853 | {"label", T_LABEL}, | |
854 | {"kernel", T_KERNEL}, | |
855 | {"linux", T_LINUX}, | |
856 | {"localboot", T_LOCALBOOT}, | |
857 | {"append", T_APPEND}, | |
858 | {"initrd", T_INITRD}, | |
859 | {"include", T_INCLUDE}, | |
860 | {"devicetree", T_FDT}, | |
861 | {"fdt", T_FDT}, | |
862 | {"devicetreedir", T_FDTDIR}, | |
863 | {"fdtdir", T_FDTDIR}, | |
864 | {"ontimeout", T_ONTIMEOUT,}, | |
865 | {"ipappend", T_IPAPPEND,}, | |
866 | {NULL, T_INVALID} | |
867 | }; | |
868 | ||
869 | /* | |
870 | * Since pxe(linux) files don't have a token to identify the start of a | |
871 | * literal, we have to keep track of when we're in a state where a literal is | |
872 | * expected vs when we're in a state a keyword is expected. | |
873 | */ | |
874 | enum lex_state { | |
875 | L_NORMAL = 0, | |
876 | L_KEYWORD, | |
877 | L_SLITERAL | |
878 | }; | |
879 | ||
880 | /* | |
881 | * get_string retrieves a string from *p and stores it as a token in | |
882 | * *t. | |
883 | * | |
884 | * get_string used for scanning both string literals and keywords. | |
885 | * | |
886 | * Characters from *p are copied into t-val until a character equal to | |
887 | * delim is found, or a NUL byte is reached. If delim has the special value of | |
888 | * ' ', any whitespace character will be used as a delimiter. | |
889 | * | |
890 | * If lower is unequal to 0, uppercase characters will be converted to | |
891 | * lowercase in the result. This is useful to make keywords case | |
892 | * insensitive. | |
893 | * | |
894 | * The location of *p is updated to point to the first character after the end | |
895 | * of the token - the ending delimiter. | |
896 | * | |
897 | * On success, the new value of t->val is returned. Memory for t->val is | |
898 | * allocated using malloc and must be free()'d to reclaim it. If insufficient | |
899 | * memory is available, NULL is returned. | |
900 | */ | |
901 | static char *get_string(char **p, struct token *t, char delim, int lower) | |
902 | { | |
903 | char *b, *e; | |
904 | size_t len, i; | |
905 | ||
906 | /* | |
907 | * b and e both start at the beginning of the input stream. | |
908 | * | |
909 | * e is incremented until we find the ending delimiter, or a NUL byte | |
910 | * is reached. Then, we take e - b to find the length of the token. | |
911 | */ | |
912 | b = e = *p; | |
913 | ||
914 | while (*e) { | |
915 | if ((delim == ' ' && isspace(*e)) || delim == *e) | |
916 | break; | |
917 | e++; | |
918 | } | |
919 | ||
920 | len = e - b; | |
921 | ||
922 | /* | |
923 | * Allocate memory to hold the string, and copy it in, converting | |
924 | * characters to lowercase if lower is != 0. | |
925 | */ | |
926 | t->val = malloc(len + 1); | |
927 | if (!t->val) | |
928 | return NULL; | |
929 | ||
930 | for (i = 0; i < len; i++, b++) { | |
931 | if (lower) | |
932 | t->val[i] = tolower(*b); | |
933 | else | |
934 | t->val[i] = *b; | |
935 | } | |
936 | ||
937 | t->val[len] = '\0'; | |
938 | ||
939 | /* | |
940 | * Update *p so the caller knows where to continue scanning. | |
941 | */ | |
942 | *p = e; | |
943 | ||
944 | t->type = T_STRING; | |
945 | ||
946 | return t->val; | |
947 | } | |
948 | ||
949 | /* | |
950 | * Populate a keyword token with a type and value. | |
951 | */ | |
952 | static void get_keyword(struct token *t) | |
953 | { | |
954 | int i; | |
955 | ||
956 | for (i = 0; keywords[i].val; i++) { | |
957 | if (!strcmp(t->val, keywords[i].val)) { | |
958 | t->type = keywords[i].type; | |
959 | break; | |
960 | } | |
961 | } | |
962 | } | |
963 | ||
964 | /* | |
965 | * Get the next token. We have to keep track of which state we're in to know | |
966 | * if we're looking to get a string literal or a keyword. | |
967 | * | |
968 | * *p is updated to point at the first character after the current token. | |
969 | */ | |
970 | static void get_token(char **p, struct token *t, enum lex_state state) | |
971 | { | |
972 | char *c = *p; | |
973 | ||
974 | t->type = T_INVALID; | |
975 | ||
976 | /* eat non EOL whitespace */ | |
977 | while (isblank(*c)) | |
978 | c++; | |
979 | ||
980 | /* | |
981 | * eat comments. note that string literals can't begin with #, but | |
982 | * can contain a # after their first character. | |
983 | */ | |
984 | if (*c == '#') { | |
985 | while (*c && *c != '\n') | |
986 | c++; | |
987 | } | |
988 | ||
989 | if (*c == '\n') { | |
990 | t->type = T_EOL; | |
991 | c++; | |
992 | } else if (*c == '\0') { | |
993 | t->type = T_EOF; | |
994 | c++; | |
995 | } else if (state == L_SLITERAL) { | |
996 | get_string(&c, t, '\n', 0); | |
997 | } else if (state == L_KEYWORD) { | |
998 | /* | |
999 | * when we expect a keyword, we first get the next string | |
1000 | * token delimited by whitespace, and then check if it | |
1001 | * matches a keyword in our keyword list. if it does, it's | |
1002 | * converted to a keyword token of the appropriate type, and | |
1003 | * if not, it remains a string token. | |
1004 | */ | |
1005 | get_string(&c, t, ' ', 1); | |
1006 | get_keyword(t); | |
1007 | } | |
1008 | ||
1009 | *p = c; | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * Increment *c until we get to the end of the current line, or EOF. | |
1014 | */ | |
1015 | static void eol_or_eof(char **c) | |
1016 | { | |
1017 | while (**c && **c != '\n') | |
1018 | (*c)++; | |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | * All of these parse_* functions share some common behavior. | |
1023 | * | |
1024 | * They finish with *c pointing after the token they parse, and return 1 on | |
1025 | * success, or < 0 on error. | |
1026 | */ | |
1027 | ||
1028 | /* | |
1029 | * Parse a string literal and store a pointer it at *dst. String literals | |
1030 | * terminate at the end of the line. | |
1031 | */ | |
1032 | static int parse_sliteral(char **c, char **dst) | |
1033 | { | |
1034 | struct token t; | |
1035 | char *s = *c; | |
1036 | ||
1037 | get_token(c, &t, L_SLITERAL); | |
1038 | ||
1039 | if (t.type != T_STRING) { | |
1040 | printf("Expected string literal: %.*s\n", (int)(*c - s), s); | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | ||
1044 | *dst = t.val; | |
1045 | ||
1046 | return 1; | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * Parse a base 10 (unsigned) integer and store it at *dst. | |
1051 | */ | |
1052 | static int parse_integer(char **c, int *dst) | |
1053 | { | |
1054 | struct token t; | |
1055 | char *s = *c; | |
1056 | ||
1057 | get_token(c, &t, L_SLITERAL); | |
1058 | ||
1059 | if (t.type != T_STRING) { | |
1060 | printf("Expected string: %.*s\n", (int)(*c - s), s); | |
1061 | return -EINVAL; | |
1062 | } | |
1063 | ||
1064 | *dst = simple_strtol(t.val, NULL, 10); | |
1065 | ||
1066 | free(t.val); | |
1067 | ||
1068 | return 1; | |
1069 | } | |
1070 | ||
1071 | static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base, | |
1072 | struct pxe_menu *cfg, int nest_level); | |
1073 | ||
1074 | /* | |
1075 | * Parse an include statement, and retrieve and parse the file it mentions. | |
1076 | * | |
1077 | * base should point to a location where it's safe to store the file, and | |
1078 | * nest_level should indicate how many nested includes have occurred. For this | |
1079 | * include, nest_level has already been incremented and doesn't need to be | |
1080 | * incremented here. | |
1081 | */ | |
1082 | static int handle_include(cmd_tbl_t *cmdtp, char **c, unsigned long base, | |
1083 | struct pxe_menu *cfg, int nest_level) | |
1084 | { | |
1085 | char *include_path; | |
1086 | char *s = *c; | |
1087 | int err; | |
1088 | char *buf; | |
1089 | int ret; | |
1090 | ||
1091 | err = parse_sliteral(c, &include_path); | |
1092 | ||
1093 | if (err < 0) { | |
1094 | printf("Expected include path: %.*s\n", | |
1095 | (int)(*c - s), s); | |
1096 | return err; | |
1097 | } | |
1098 | ||
1099 | err = get_pxe_file(cmdtp, include_path, base); | |
1100 | ||
1101 | if (err < 0) { | |
1102 | printf("Couldn't retrieve %s\n", include_path); | |
1103 | return err; | |
1104 | } | |
1105 | ||
1106 | buf = map_sysmem(base, 0); | |
1107 | ret = parse_pxefile_top(cmdtp, buf, base, cfg, nest_level); | |
1108 | unmap_sysmem(buf); | |
1109 | ||
1110 | return ret; | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * Parse lines that begin with 'menu'. | |
1115 | * | |
1116 | * base and nest are provided to handle the 'menu include' case. | |
1117 | * | |
1118 | * base should point to a location where it's safe to store the included file. | |
1119 | * | |
1120 | * nest_level should be 1 when parsing the top level pxe file, 2 when parsing | |
1121 | * a file it includes, 3 when parsing a file included by that file, and so on. | |
1122 | */ | |
1123 | static int parse_menu(cmd_tbl_t *cmdtp, char **c, struct pxe_menu *cfg, | |
1124 | unsigned long base, int nest_level) | |
1125 | { | |
1126 | struct token t; | |
1127 | char *s = *c; | |
1128 | int err = 0; | |
1129 | ||
1130 | get_token(c, &t, L_KEYWORD); | |
1131 | ||
1132 | switch (t.type) { | |
1133 | case T_TITLE: | |
1134 | err = parse_sliteral(c, &cfg->title); | |
1135 | ||
1136 | break; | |
1137 | ||
1138 | case T_INCLUDE: | |
1139 | err = handle_include(cmdtp, c, base, cfg, | |
1140 | nest_level + 1); | |
1141 | break; | |
1142 | ||
1143 | default: | |
1144 | printf("Ignoring malformed menu command: %.*s\n", | |
1145 | (int)(*c - s), s); | |
1146 | } | |
1147 | ||
1148 | if (err < 0) | |
1149 | return err; | |
1150 | ||
1151 | eol_or_eof(c); | |
1152 | ||
1153 | return 1; | |
1154 | } | |
1155 | ||
1156 | /* | |
1157 | * Handles parsing a 'menu line' when we're parsing a label. | |
1158 | */ | |
1159 | static int parse_label_menu(char **c, struct pxe_menu *cfg, | |
1160 | struct pxe_label *label) | |
1161 | { | |
1162 | struct token t; | |
1163 | char *s; | |
1164 | ||
1165 | s = *c; | |
1166 | ||
1167 | get_token(c, &t, L_KEYWORD); | |
1168 | ||
1169 | switch (t.type) { | |
1170 | case T_DEFAULT: | |
1171 | if (!cfg->default_label) | |
1172 | cfg->default_label = strdup(label->name); | |
1173 | ||
1174 | if (!cfg->default_label) | |
1175 | return -ENOMEM; | |
1176 | ||
1177 | break; | |
1178 | case T_LABEL: | |
1179 | parse_sliteral(c, &label->menu); | |
1180 | break; | |
1181 | default: | |
1182 | printf("Ignoring malformed menu command: %.*s\n", | |
1183 | (int)(*c - s), s); | |
1184 | } | |
1185 | ||
1186 | eol_or_eof(c); | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | /* | |
1192 | * Parses a label and adds it to the list of labels for a menu. | |
1193 | * | |
1194 | * A label ends when we either get to the end of a file, or | |
1195 | * get some input we otherwise don't have a handler defined | |
1196 | * for. | |
1197 | * | |
1198 | */ | |
1199 | static int parse_label(char **c, struct pxe_menu *cfg) | |
1200 | { | |
1201 | struct token t; | |
1202 | int len; | |
1203 | char *s = *c; | |
1204 | struct pxe_label *label; | |
1205 | int err; | |
1206 | ||
1207 | label = label_create(); | |
1208 | if (!label) | |
1209 | return -ENOMEM; | |
1210 | ||
1211 | err = parse_sliteral(c, &label->name); | |
1212 | if (err < 0) { | |
1213 | printf("Expected label name: %.*s\n", (int)(*c - s), s); | |
1214 | label_destroy(label); | |
1215 | return -EINVAL; | |
1216 | } | |
1217 | ||
1218 | list_add_tail(&label->list, &cfg->labels); | |
1219 | ||
1220 | while (1) { | |
1221 | s = *c; | |
1222 | get_token(c, &t, L_KEYWORD); | |
1223 | ||
1224 | err = 0; | |
1225 | switch (t.type) { | |
1226 | case T_MENU: | |
1227 | err = parse_label_menu(c, cfg, label); | |
1228 | break; | |
1229 | ||
1230 | case T_KERNEL: | |
1231 | case T_LINUX: | |
1232 | err = parse_sliteral(c, &label->kernel); | |
1233 | break; | |
1234 | ||
1235 | case T_APPEND: | |
1236 | err = parse_sliteral(c, &label->append); | |
1237 | if (label->initrd) | |
1238 | break; | |
1239 | s = strstr(label->append, "initrd="); | |
1240 | if (!s) | |
1241 | break; | |
1242 | s += 7; | |
1243 | len = (int)(strchr(s, ' ') - s); | |
1244 | label->initrd = malloc(len + 1); | |
1245 | strncpy(label->initrd, s, len); | |
1246 | label->initrd[len] = '\0'; | |
1247 | ||
1248 | break; | |
1249 | ||
1250 | case T_INITRD: | |
1251 | if (!label->initrd) | |
1252 | err = parse_sliteral(c, &label->initrd); | |
1253 | break; | |
1254 | ||
1255 | case T_FDT: | |
1256 | if (!label->fdt) | |
1257 | err = parse_sliteral(c, &label->fdt); | |
1258 | break; | |
1259 | ||
1260 | case T_FDTDIR: | |
1261 | if (!label->fdtdir) | |
1262 | err = parse_sliteral(c, &label->fdtdir); | |
1263 | break; | |
1264 | ||
1265 | case T_LOCALBOOT: | |
1266 | label->localboot = 1; | |
1267 | err = parse_integer(c, &label->localboot_val); | |
1268 | break; | |
1269 | ||
1270 | case T_IPAPPEND: | |
1271 | err = parse_integer(c, &label->ipappend); | |
1272 | break; | |
1273 | ||
1274 | case T_EOL: | |
1275 | break; | |
1276 | ||
1277 | default: | |
1278 | /* | |
1279 | * put the token back! we don't want it - it's the end | |
1280 | * of a label and whatever token this is, it's | |
1281 | * something for the menu level context to handle. | |
1282 | */ | |
1283 | *c = s; | |
1284 | return 1; | |
1285 | } | |
1286 | ||
1287 | if (err < 0) | |
1288 | return err; | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * This 16 comes from the limit pxelinux imposes on nested includes. | |
1294 | * | |
1295 | * There is no reason at all we couldn't do more, but some limit helps prevent | |
1296 | * infinite (until crash occurs) recursion if a file tries to include itself. | |
1297 | */ | |
1298 | #define MAX_NEST_LEVEL 16 | |
1299 | ||
1300 | /* | |
1301 | * Entry point for parsing a menu file. nest_level indicates how many times | |
1302 | * we've nested in includes. It will be 1 for the top level menu file. | |
1303 | * | |
1304 | * Returns 1 on success, < 0 on error. | |
1305 | */ | |
1306 | static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base, | |
1307 | struct pxe_menu *cfg, int nest_level) | |
1308 | { | |
1309 | struct token t; | |
1310 | char *s, *b, *label_name; | |
1311 | int err; | |
1312 | ||
1313 | b = p; | |
1314 | ||
1315 | if (nest_level > MAX_NEST_LEVEL) { | |
1316 | printf("Maximum nesting (%d) exceeded\n", MAX_NEST_LEVEL); | |
1317 | return -EMLINK; | |
1318 | } | |
1319 | ||
1320 | while (1) { | |
1321 | s = p; | |
1322 | ||
1323 | get_token(&p, &t, L_KEYWORD); | |
1324 | ||
1325 | err = 0; | |
1326 | switch (t.type) { | |
1327 | case T_MENU: | |
1328 | cfg->prompt = 1; | |
1329 | err = parse_menu(cmdtp, &p, cfg, | |
1330 | base + ALIGN(strlen(b) + 1, 4), | |
1331 | nest_level); | |
1332 | break; | |
1333 | ||
1334 | case T_TIMEOUT: | |
1335 | err = parse_integer(&p, &cfg->timeout); | |
1336 | break; | |
1337 | ||
1338 | case T_LABEL: | |
1339 | err = parse_label(&p, cfg); | |
1340 | break; | |
1341 | ||
1342 | case T_DEFAULT: | |
1343 | case T_ONTIMEOUT: | |
1344 | err = parse_sliteral(&p, &label_name); | |
1345 | ||
1346 | if (label_name) { | |
1347 | if (cfg->default_label) | |
1348 | free(cfg->default_label); | |
1349 | ||
1350 | cfg->default_label = label_name; | |
1351 | } | |
1352 | ||
1353 | break; | |
1354 | ||
1355 | case T_INCLUDE: | |
1356 | err = handle_include(cmdtp, &p, | |
1357 | base + ALIGN(strlen(b), 4), cfg, | |
1358 | nest_level + 1); | |
1359 | break; | |
1360 | ||
1361 | case T_PROMPT: | |
1362 | eol_or_eof(&p); | |
1363 | break; | |
1364 | ||
1365 | case T_EOL: | |
1366 | break; | |
1367 | ||
1368 | case T_EOF: | |
1369 | return 1; | |
1370 | ||
1371 | default: | |
1372 | printf("Ignoring unknown command: %.*s\n", | |
1373 | (int)(p - s), s); | |
1374 | eol_or_eof(&p); | |
1375 | } | |
1376 | ||
1377 | if (err < 0) | |
1378 | return err; | |
1379 | } | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * Free the memory used by a pxe_menu and its labels. | |
1384 | */ | |
1385 | static void destroy_pxe_menu(struct pxe_menu *cfg) | |
1386 | { | |
1387 | struct list_head *pos, *n; | |
1388 | struct pxe_label *label; | |
1389 | ||
1390 | if (cfg->title) | |
1391 | free(cfg->title); | |
1392 | ||
1393 | if (cfg->default_label) | |
1394 | free(cfg->default_label); | |
1395 | ||
1396 | list_for_each_safe(pos, n, &cfg->labels) { | |
1397 | label = list_entry(pos, struct pxe_label, list); | |
1398 | ||
1399 | label_destroy(label); | |
1400 | } | |
1401 | ||
1402 | free(cfg); | |
1403 | } | |
1404 | ||
1405 | /* | |
1406 | * Entry point for parsing a pxe file. This is only used for the top level | |
1407 | * file. | |
1408 | * | |
1409 | * Returns NULL if there is an error, otherwise, returns a pointer to a | |
1410 | * pxe_menu struct populated with the results of parsing the pxe file (and any | |
1411 | * files it includes). The resulting pxe_menu struct can be free()'d by using | |
1412 | * the destroy_pxe_menu() function. | |
1413 | */ | |
1414 | static struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, unsigned long menucfg) | |
1415 | { | |
1416 | struct pxe_menu *cfg; | |
1417 | char *buf; | |
1418 | int r; | |
1419 | ||
1420 | cfg = malloc(sizeof(struct pxe_menu)); | |
1421 | ||
1422 | if (!cfg) | |
1423 | return NULL; | |
1424 | ||
1425 | memset(cfg, 0, sizeof(struct pxe_menu)); | |
1426 | ||
1427 | INIT_LIST_HEAD(&cfg->labels); | |
1428 | ||
1429 | buf = map_sysmem(menucfg, 0); | |
1430 | r = parse_pxefile_top(cmdtp, buf, menucfg, cfg, 1); | |
1431 | unmap_sysmem(buf); | |
1432 | ||
1433 | if (r < 0) { | |
1434 | destroy_pxe_menu(cfg); | |
1435 | return NULL; | |
1436 | } | |
1437 | ||
1438 | return cfg; | |
1439 | } | |
1440 | ||
1441 | /* | |
1442 | * Converts a pxe_menu struct into a menu struct for use with U-Boot's generic | |
1443 | * menu code. | |
1444 | */ | |
1445 | static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg) | |
1446 | { | |
1447 | struct pxe_label *label; | |
1448 | struct list_head *pos; | |
1449 | struct menu *m; | |
1450 | int err; | |
1451 | int i = 1; | |
1452 | char *default_num = NULL; | |
1453 | ||
1454 | /* | |
1455 | * Create a menu and add items for all the labels. | |
1456 | */ | |
1457 | m = menu_create(cfg->title, cfg->timeout, cfg->prompt, label_print, | |
1458 | NULL, NULL); | |
1459 | ||
1460 | if (!m) | |
1461 | return NULL; | |
1462 | ||
1463 | list_for_each(pos, &cfg->labels) { | |
1464 | label = list_entry(pos, struct pxe_label, list); | |
1465 | ||
1466 | sprintf(label->num, "%d", i++); | |
1467 | if (menu_item_add(m, label->num, label) != 1) { | |
1468 | menu_destroy(m); | |
1469 | return NULL; | |
1470 | } | |
1471 | if (cfg->default_label && | |
1472 | (strcmp(label->name, cfg->default_label) == 0)) | |
1473 | default_num = label->num; | |
1474 | ||
1475 | } | |
1476 | ||
1477 | /* | |
1478 | * After we've created items for each label in the menu, set the | |
1479 | * menu's default label if one was specified. | |
1480 | */ | |
1481 | if (default_num) { | |
1482 | err = menu_default_set(m, default_num); | |
1483 | if (err != 1) { | |
1484 | if (err != -ENOENT) { | |
1485 | menu_destroy(m); | |
1486 | return NULL; | |
1487 | } | |
1488 | ||
1489 | printf("Missing default: %s\n", cfg->default_label); | |
1490 | } | |
1491 | } | |
1492 | ||
1493 | return m; | |
1494 | } | |
1495 | ||
1496 | /* | |
1497 | * Try to boot any labels we have yet to attempt to boot. | |
1498 | */ | |
1499 | static void boot_unattempted_labels(cmd_tbl_t *cmdtp, struct pxe_menu *cfg) | |
1500 | { | |
1501 | struct list_head *pos; | |
1502 | struct pxe_label *label; | |
1503 | ||
1504 | list_for_each(pos, &cfg->labels) { | |
1505 | label = list_entry(pos, struct pxe_label, list); | |
1506 | ||
1507 | if (!label->attempted) | |
1508 | label_boot(cmdtp, label); | |
1509 | } | |
1510 | } | |
1511 | ||
1512 | /* | |
1513 | * Boot the system as prescribed by a pxe_menu. | |
1514 | * | |
1515 | * Use the menu system to either get the user's choice or the default, based | |
1516 | * on config or user input. If there is no default or user's choice, | |
1517 | * attempted to boot labels in the order they were given in pxe files. | |
1518 | * If the default or user's choice fails to boot, attempt to boot other | |
1519 | * labels in the order they were given in pxe files. | |
1520 | * | |
1521 | * If this function returns, there weren't any labels that successfully | |
1522 | * booted, or the user interrupted the menu selection via ctrl+c. | |
1523 | */ | |
1524 | static void handle_pxe_menu(cmd_tbl_t *cmdtp, struct pxe_menu *cfg) | |
1525 | { | |
1526 | void *choice; | |
1527 | struct menu *m; | |
1528 | int err; | |
1529 | ||
1530 | m = pxe_menu_to_menu(cfg); | |
1531 | if (!m) | |
1532 | return; | |
1533 | ||
1534 | err = menu_get_choice(m, &choice); | |
1535 | ||
1536 | menu_destroy(m); | |
1537 | ||
1538 | /* | |
1539 | * err == 1 means we got a choice back from menu_get_choice. | |
1540 | * | |
1541 | * err == -ENOENT if the menu was setup to select the default but no | |
1542 | * default was set. in that case, we should continue trying to boot | |
1543 | * labels that haven't been attempted yet. | |
1544 | * | |
1545 | * otherwise, the user interrupted or there was some other error and | |
1546 | * we give up. | |
1547 | */ | |
1548 | ||
1549 | if (err == 1) { | |
1550 | err = label_boot(cmdtp, choice); | |
1551 | if (!err) | |
1552 | return; | |
1553 | } else if (err != -ENOENT) { | |
1554 | return; | |
1555 | } | |
1556 | ||
1557 | boot_unattempted_labels(cmdtp, cfg); | |
1558 | } | |
1559 | ||
1560 | #ifdef CONFIG_CMD_NET | |
1561 | /* | |
1562 | * Boots a system using a pxe file | |
1563 | * | |
1564 | * Returns 0 on success, 1 on error. | |
1565 | */ | |
1566 | static int | |
1567 | do_pxe_boot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
1568 | { | |
1569 | unsigned long pxefile_addr_r; | |
1570 | struct pxe_menu *cfg; | |
1571 | char *pxefile_addr_str; | |
1572 | ||
1573 | do_getfile = do_get_tftp; | |
1574 | ||
1575 | if (argc == 1) { | |
1576 | pxefile_addr_str = from_env("pxefile_addr_r"); | |
1577 | if (!pxefile_addr_str) | |
1578 | return 1; | |
1579 | ||
1580 | } else if (argc == 2) { | |
1581 | pxefile_addr_str = argv[1]; | |
1582 | } else { | |
1583 | return CMD_RET_USAGE; | |
1584 | } | |
1585 | ||
1586 | if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) { | |
1587 | printf("Invalid pxefile address: %s\n", pxefile_addr_str); | |
1588 | return 1; | |
1589 | } | |
1590 | ||
1591 | cfg = parse_pxefile(cmdtp, pxefile_addr_r); | |
1592 | ||
1593 | if (cfg == NULL) { | |
1594 | printf("Error parsing config file\n"); | |
1595 | return 1; | |
1596 | } | |
1597 | ||
1598 | handle_pxe_menu(cmdtp, cfg); | |
1599 | ||
1600 | destroy_pxe_menu(cfg); | |
1601 | ||
1602 | copy_filename(net_boot_file_name, "", sizeof(net_boot_file_name)); | |
1603 | ||
1604 | return 0; | |
1605 | } | |
1606 | ||
1607 | static cmd_tbl_t cmd_pxe_sub[] = { | |
1608 | U_BOOT_CMD_MKENT(get, 1, 1, do_pxe_get, "", ""), | |
1609 | U_BOOT_CMD_MKENT(boot, 2, 1, do_pxe_boot, "", "") | |
1610 | }; | |
1611 | ||
1612 | static int do_pxe(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
1613 | { | |
1614 | cmd_tbl_t *cp; | |
1615 | ||
1616 | if (argc < 2) | |
1617 | return CMD_RET_USAGE; | |
1618 | ||
1619 | is_pxe = true; | |
1620 | ||
1621 | /* drop initial "pxe" arg */ | |
1622 | argc--; | |
1623 | argv++; | |
1624 | ||
1625 | cp = find_cmd_tbl(argv[0], cmd_pxe_sub, ARRAY_SIZE(cmd_pxe_sub)); | |
1626 | ||
1627 | if (cp) | |
1628 | return cp->cmd(cmdtp, flag, argc, argv); | |
1629 | ||
1630 | return CMD_RET_USAGE; | |
1631 | } | |
1632 | ||
1633 | U_BOOT_CMD( | |
1634 | pxe, 3, 1, do_pxe, | |
1635 | "commands to get and boot from pxe files", | |
1636 | "get - try to retrieve a pxe file using tftp\npxe " | |
1637 | "boot [pxefile_addr_r] - boot from the pxe file at pxefile_addr_r\n" | |
1638 | ); | |
1639 | #endif | |
1640 | ||
1641 | /* | |
1642 | * Boots a system using a local disk syslinux/extlinux file | |
1643 | * | |
1644 | * Returns 0 on success, 1 on error. | |
1645 | */ | |
1646 | static int do_sysboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
1647 | { | |
1648 | unsigned long pxefile_addr_r; | |
1649 | struct pxe_menu *cfg; | |
1650 | char *pxefile_addr_str; | |
1651 | char *filename; | |
1652 | int prompt = 0; | |
1653 | ||
1654 | is_pxe = false; | |
1655 | ||
1656 | if (argc > 1 && strstr(argv[1], "-p")) { | |
1657 | prompt = 1; | |
1658 | argc--; | |
1659 | argv++; | |
1660 | } | |
1661 | ||
1662 | if (argc < 4) | |
1663 | return cmd_usage(cmdtp); | |
1664 | ||
1665 | if (argc < 5) { | |
1666 | pxefile_addr_str = from_env("pxefile_addr_r"); | |
1667 | if (!pxefile_addr_str) | |
1668 | return 1; | |
1669 | } else { | |
1670 | pxefile_addr_str = argv[4]; | |
1671 | } | |
1672 | ||
1673 | if (argc < 6) | |
1674 | filename = getenv("bootfile"); | |
1675 | else { | |
1676 | filename = argv[5]; | |
1677 | setenv("bootfile", filename); | |
1678 | } | |
1679 | ||
1680 | if (strstr(argv[3], "ext2")) | |
1681 | do_getfile = do_get_ext2; | |
1682 | else if (strstr(argv[3], "fat")) | |
1683 | do_getfile = do_get_fat; | |
1684 | else if (strstr(argv[3], "any")) | |
1685 | do_getfile = do_get_any; | |
1686 | else { | |
1687 | printf("Invalid filesystem: %s\n", argv[3]); | |
1688 | return 1; | |
1689 | } | |
1690 | fs_argv[1] = argv[1]; | |
1691 | fs_argv[2] = argv[2]; | |
1692 | ||
1693 | if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) { | |
1694 | printf("Invalid pxefile address: %s\n", pxefile_addr_str); | |
1695 | return 1; | |
1696 | } | |
1697 | ||
1698 | if (get_pxe_file(cmdtp, filename, pxefile_addr_r) < 0) { | |
1699 | printf("Error reading config file\n"); | |
1700 | return 1; | |
1701 | } | |
1702 | ||
1703 | cfg = parse_pxefile(cmdtp, pxefile_addr_r); | |
1704 | ||
1705 | if (cfg == NULL) { | |
1706 | printf("Error parsing config file\n"); | |
1707 | return 1; | |
1708 | } | |
1709 | ||
1710 | if (prompt) | |
1711 | cfg->prompt = 1; | |
1712 | ||
1713 | handle_pxe_menu(cmdtp, cfg); | |
1714 | ||
1715 | destroy_pxe_menu(cfg); | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | U_BOOT_CMD( | |
1721 | sysboot, 7, 1, do_sysboot, | |
1722 | "command to get and boot from syslinux files", | |
1723 | "[-p] <interface> <dev[:part]> <ext2|fat|any> [addr] [filename]\n" | |
1724 | " - load and parse syslinux menu file 'filename' from ext2, fat\n" | |
1725 | " or any filesystem on 'dev' on 'interface' to address 'addr'" | |
1726 | ); |