2 * Copyright 2010-2011 Calxeda, Inc.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <linux/string.h>
21 #include <linux/ctype.h>
23 #include <linux/list.h>
27 #define MAX_TFTP_PATH_LEN 127
31 * Like getenv, but prints an error if envvar isn't defined in the
32 * environment. It always returns what getenv does, so it can be used in
33 * place of getenv without changing error handling otherwise.
35 static char *from_env(char *envvar)
42 printf("missing environment variable: %s\n", envvar);
48 * Convert an ethaddr from the environment to the format used by pxelinux
49 * filenames based on mac addresses. Convert's ':' to '-', and adds "01-" to
50 * the beginning of the ethernet address to indicate a hardware type of
51 * Ethernet. Also converts uppercase hex characters into lowercase, to match
52 * pxelinux's behavior.
54 * Returns 1 for success, -ENOENT if 'ethaddr' is undefined in the
55 * environment, or some other value < 0 on error.
57 static int format_mac_pxe(char *outbuf, size_t outbuf_len)
62 ethaddr = from_env("ethaddr");
67 ethaddr_len = strlen(ethaddr);
70 * ethaddr_len + 4 gives room for "01-", ethaddr, and a NUL byte at
73 if (outbuf_len < ethaddr_len + 4) {
74 printf("outbuf is too small (%d < %d)\n",
75 outbuf_len, ethaddr_len + 4);
80 strcpy(outbuf, "01-");
82 for (p = outbuf + 3; *ethaddr; ethaddr++, p++) {
86 *p = tolower(*ethaddr);
95 * Returns the directory the file specified in the bootfile env variable is
96 * in. If bootfile isn't defined in the environment, return NULL, which should
97 * be interpreted as "don't prepend anything to paths".
99 static int get_bootfile_path(const char *file_path, char *bootfile_path,
100 size_t bootfile_path_size)
102 char *bootfile, *last_slash;
105 if (file_path[0] == '/')
108 bootfile = from_env("bootfile");
113 last_slash = strrchr(bootfile, '/');
115 if (last_slash == NULL)
118 path_len = (last_slash - bootfile) + 1;
120 if (bootfile_path_size < path_len) {
121 printf("bootfile_path too small. (%d < %d)\n",
122 bootfile_path_size, path_len);
127 strncpy(bootfile_path, bootfile, path_len);
130 bootfile_path[path_len] = '\0';
135 static int (*do_getfile)(char *file_path, char *file_addr);
137 static int do_get_tftp(char *file_path, char *file_addr)
139 char *tftp_argv[] = {"tftp", NULL, NULL, NULL};
141 tftp_argv[1] = file_addr;
142 tftp_argv[2] = file_path;
144 if (do_tftpb(NULL, 0, 3, tftp_argv))
150 static char *fs_argv[5];
152 static int do_get_ext2(char *file_path, char *file_addr)
154 #ifdef CONFIG_CMD_EXT2
155 fs_argv[0] = "ext2load";
156 fs_argv[3] = file_addr;
157 fs_argv[4] = file_path;
159 if (!do_ext2load(NULL, 0, 5, fs_argv))
165 static int do_get_fat(char *file_path, char *file_addr)
167 #ifdef CONFIG_CMD_FAT
168 fs_argv[0] = "fatload";
169 fs_argv[3] = file_addr;
170 fs_argv[4] = file_path;
172 if (!do_fat_fsload(NULL, 0, 5, fs_argv))
181 * As in pxelinux, paths to files referenced from files we retrieve are
182 * relative to the location of bootfile. get_relfile takes such a path and
183 * joins it with the bootfile path to get the full path to the target file. If
184 * the bootfile path is NULL, we use file_path as is.
186 * Returns 1 for success, or < 0 on error.
188 static int get_relfile(char *file_path, void *file_addr)
191 char relfile[MAX_TFTP_PATH_LEN+1];
195 err = get_bootfile_path(file_path, relfile, sizeof(relfile));
200 path_len = strlen(file_path);
201 path_len += strlen(relfile);
203 if (path_len > MAX_TFTP_PATH_LEN) {
204 printf("Base path too long (%s%s)\n",
208 return -ENAMETOOLONG;
211 strcat(relfile, file_path);
213 printf("Retrieving file: %s\n", relfile);
215 sprintf(addr_buf, "%p", file_addr);
217 return do_getfile(relfile, addr_buf);
221 * Retrieve the file at 'file_path' to the locate given by 'file_addr'. If
222 * 'bootfile' was specified in the environment, the path to bootfile will be
223 * prepended to 'file_path' and the resulting path will be used.
225 * Returns 1 on success, or < 0 for error.
227 static int get_pxe_file(char *file_path, void *file_addr)
229 unsigned long config_file_size;
233 err = get_relfile(file_path, file_addr);
239 * the file comes without a NUL byte at the end, so find out its size
240 * and add the NUL byte.
242 tftp_filesize = from_env("filesize");
247 if (strict_strtoul(tftp_filesize, 16, &config_file_size) < 0)
250 *(char *)(file_addr + config_file_size) = '\0';
255 #define PXELINUX_DIR "pxelinux.cfg/"
258 * Retrieves a file in the 'pxelinux.cfg' folder. Since this uses get_pxe_file
259 * to do the hard work, the location of the 'pxelinux.cfg' folder is generated
260 * from the bootfile path, as described above.
262 * Returns 1 on success or < 0 on error.
264 static int get_pxelinux_path(char *file, void *pxefile_addr_r)
266 size_t base_len = strlen(PXELINUX_DIR);
267 char path[MAX_TFTP_PATH_LEN+1];
269 if (base_len + strlen(file) > MAX_TFTP_PATH_LEN) {
270 printf("path (%s%s) too long, skipping\n",
272 return -ENAMETOOLONG;
275 sprintf(path, PXELINUX_DIR "%s", file);
277 return get_pxe_file(path, pxefile_addr_r);
281 * Looks for a pxe file with a name based on the pxeuuid environment variable.
283 * Returns 1 on success or < 0 on error.
285 static int pxe_uuid_path(void *pxefile_addr_r)
289 uuid_str = from_env("pxeuuid");
294 return get_pxelinux_path(uuid_str, pxefile_addr_r);
298 * Looks for a pxe file with a name based on the 'ethaddr' environment
301 * Returns 1 on success or < 0 on error.
303 static int pxe_mac_path(void *pxefile_addr_r)
308 err = format_mac_pxe(mac_str, sizeof(mac_str));
313 return get_pxelinux_path(mac_str, pxefile_addr_r);
317 * Looks for pxe files with names based on our IP address. See pxelinux
318 * documentation for details on what these file names look like. We match
321 * Returns 1 on success or < 0 on error.
323 static int pxe_ipaddr_paths(void *pxefile_addr_r)
328 sprintf(ip_addr, "%08X", ntohl(NetOurIP));
330 for (mask_pos = 7; mask_pos >= 0; mask_pos--) {
331 err = get_pxelinux_path(ip_addr, pxefile_addr_r);
336 ip_addr[mask_pos] = '\0';
343 * Entry point for the 'pxe get' command.
344 * This Follows pxelinux's rules to download a config file from a tftp server.
345 * The file is stored at the location given by the pxefile_addr_r environment
346 * variable, which must be set.
348 * UUID comes from pxeuuid env variable, if defined
349 * MAC addr comes from ethaddr env variable, if defined
352 * see http://syslinux.zytor.com/wiki/index.php/PXELINUX
354 * Returns 0 on success or 1 on error.
357 do_pxe_get(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
359 char *pxefile_addr_str;
360 unsigned long pxefile_addr_r;
363 do_getfile = do_get_tftp;
366 return CMD_RET_USAGE;
369 pxefile_addr_str = from_env("pxefile_addr_r");
371 if (!pxefile_addr_str)
374 err = strict_strtoul(pxefile_addr_str, 16,
375 (unsigned long *)&pxefile_addr_r);
380 * Keep trying paths until we successfully get a file we're looking
383 if (pxe_uuid_path((void *)pxefile_addr_r) > 0
384 || pxe_mac_path((void *)pxefile_addr_r) > 0
385 || pxe_ipaddr_paths((void *)pxefile_addr_r) > 0
386 || get_pxelinux_path("default", (void *)pxefile_addr_r) > 0) {
388 printf("Config file found\n");
393 printf("Config file not found\n");
399 * Wrapper to make it easier to store the file at file_path in the location
400 * specified by envaddr_name. file_path will be joined to the bootfile path,
401 * if any is specified.
403 * Returns 1 on success or < 0 on error.
405 static int get_relfile_envaddr(char *file_path, char *envaddr_name)
407 unsigned long file_addr;
410 envaddr = from_env(envaddr_name);
415 if (strict_strtoul(envaddr, 16, &file_addr) < 0)
418 return get_relfile(file_path, (void *)file_addr);
422 * A note on the pxe file parser.
424 * We're parsing files that use syslinux grammar, which has a few quirks.
425 * String literals must be recognized based on context - there is no
426 * quoting or escaping support. There's also nothing to explicitly indicate
427 * when a label section completes. We deal with that by ending a label
428 * section whenever we see a line that doesn't include.
430 * As with the syslinux family, this same file format could be reused in the
431 * future for non pxe purposes. The only action it takes during parsing that
432 * would throw this off is handling of include files. It assumes we're using
433 * pxe, and does a tftp download of a file listed as an include file in the
434 * middle of the parsing operation. That could be handled by refactoring it to
435 * take a 'include file getter' function.
439 * Describes a single label given in a pxe file.
441 * Create these with the 'label_create' function given below.
443 * name - the name of the menu as given on the 'menu label' line.
444 * kernel - the path to the kernel file to use for this label.
445 * append - kernel command line to use when booting this label
446 * initrd - path to the initrd to use for this label.
447 * attempted - 0 if we haven't tried to boot this label, 1 if we have.
448 * localboot - 1 if this label specified 'localboot', 0 otherwise.
449 * list - lets these form a list, which a pxe_menu struct will hold.
459 struct list_head list;
463 * Describes a pxe menu as given via pxe files.
465 * title - the name of the menu as given by a 'menu title' line.
466 * default_label - the name of the default label, if any.
467 * timeout - time in tenths of a second to wait for a user key-press before
468 * booting the default label.
469 * prompt - if 0, don't prompt for a choice unless the timeout period is
470 * interrupted. If 1, always prompt for a choice regardless of
472 * labels - a list of labels defined for the menu.
479 struct list_head labels;
483 * Allocates memory for and initializes a pxe_label. This uses malloc, so the
484 * result must be free()'d to reclaim the memory.
486 * Returns NULL if malloc fails.
488 static struct pxe_label *label_create(void)
490 struct pxe_label *label;
492 label = malloc(sizeof(struct pxe_label));
497 memset(label, 0, sizeof(struct pxe_label));
503 * Free the memory used by a pxe_label, including that used by its name,
504 * kernel, append and initrd members, if they're non NULL.
506 * So - be sure to only use dynamically allocated memory for the members of
507 * the pxe_label struct, unless you want to clean it up first. These are
508 * currently only created by the pxe file parsing code.
510 static void label_destroy(struct pxe_label *label)
528 * Print a label and its string members if they're defined.
530 * This is passed as a callback to the menu code for displaying each
533 static void label_print(void *data)
535 struct pxe_label *label = data;
536 const char *c = label->menu ? label->menu : label->kernel;
538 printf("%s:\t%s\n", label->name, c);
541 printf("\t\tkernel: %s\n", label->kernel);
544 printf("\t\tappend: %s\n", label->append);
547 printf("\t\tinitrd: %s\n", label->initrd);
551 * Boot a label that specified 'localboot'. This requires that the 'localcmd'
552 * environment variable is defined. Its contents will be executed as U-boot
553 * command. If the label specified an 'append' line, its contents will be
554 * used to overwrite the contents of the 'bootargs' environment variable prior
555 * to running 'localcmd'.
557 * Returns 1 on success or < 0 on error.
559 static int label_localboot(struct pxe_label *label)
561 char *localcmd, *dupcmd;
564 localcmd = from_env("localcmd");
570 * dup the command to avoid any issues with the version of it existing
571 * in the environment changing during the execution of the command.
573 dupcmd = strdup(localcmd);
579 setenv("bootargs", label->append);
581 printf("running: %s\n", dupcmd);
583 ret = run_command(dupcmd, 0);
591 * Boot according to the contents of a pxe_label.
593 * If we can't boot for any reason, we return. A successful boot never
596 * The kernel will be stored in the location given by the 'kernel_addr_r'
597 * environment variable.
599 * If the label specifies an initrd file, it will be stored in the location
600 * given by the 'ramdisk_addr_r' environment variable.
602 * If the label specifies an 'append' line, its contents will overwrite that
603 * of the 'bootargs' environment variable.
605 static void label_boot(struct pxe_label *label)
607 char *bootm_argv[] = { "bootm", NULL, NULL, NULL, NULL };
612 label->attempted = 1;
614 if (label->localboot) {
615 label_localboot(label);
619 if (label->kernel == NULL) {
620 printf("No kernel given, skipping %s\n",
626 if (get_relfile_envaddr(label->initrd, "ramdisk_addr_r") < 0) {
627 printf("Skipping %s for failure retrieving initrd\n",
632 bootm_argv[2] = getenv("ramdisk_addr_r");
637 if (get_relfile_envaddr(label->kernel, "kernel_addr_r") < 0) {
638 printf("Skipping %s for failure retrieving kernel\n",
644 setenv("bootargs", label->append);
646 bootm_argv[1] = getenv("kernel_addr_r");
649 * fdt usage is optional. If there is an fdt_addr specified, we will
650 * pass it along to bootm, and adjust argc appropriately.
652 bootm_argv[3] = getenv("fdt_addr");
657 do_bootm(NULL, 0, bootm_argc, bootm_argv);
661 * Tokens for the pxe file parser.
683 * A token - given by a value and a type.
687 enum token_type type;
691 * Keywords recognized.
693 static const struct token keywords[] = {
696 {"timeout", T_TIMEOUT},
697 {"default", T_DEFAULT},
698 {"prompt", T_PROMPT},
700 {"kernel", T_KERNEL},
702 {"localboot", T_LOCALBOOT},
703 {"append", T_APPEND},
704 {"initrd", T_INITRD},
705 {"include", T_INCLUDE},
710 * Since pxe(linux) files don't have a token to identify the start of a
711 * literal, we have to keep track of when we're in a state where a literal is
712 * expected vs when we're in a state a keyword is expected.
721 * get_string retrieves a string from *p and stores it as a token in
724 * get_string used for scanning both string literals and keywords.
726 * Characters from *p are copied into t-val until a character equal to
727 * delim is found, or a NUL byte is reached. If delim has the special value of
728 * ' ', any whitespace character will be used as a delimiter.
730 * If lower is unequal to 0, uppercase characters will be converted to
731 * lowercase in the result. This is useful to make keywords case
734 * The location of *p is updated to point to the first character after the end
735 * of the token - the ending delimiter.
737 * On success, the new value of t->val is returned. Memory for t->val is
738 * allocated using malloc and must be free()'d to reclaim it. If insufficient
739 * memory is available, NULL is returned.
741 static char *get_string(char **p, struct token *t, char delim, int lower)
747 * b and e both start at the beginning of the input stream.
749 * e is incremented until we find the ending delimiter, or a NUL byte
750 * is reached. Then, we take e - b to find the length of the token.
755 if ((delim == ' ' && isspace(*e)) || delim == *e)
763 * Allocate memory to hold the string, and copy it in, converting
764 * characters to lowercase if lower is != 0.
766 t->val = malloc(len + 1);
770 for (i = 0; i < len; i++, b++) {
772 t->val[i] = tolower(*b);
780 * Update *p so the caller knows where to continue scanning.
790 * Populate a keyword token with a type and value.
792 static void get_keyword(struct token *t)
796 for (i = 0; keywords[i].val; i++) {
797 if (!strcmp(t->val, keywords[i].val)) {
798 t->type = keywords[i].type;
805 * Get the next token. We have to keep track of which state we're in to know
806 * if we're looking to get a string literal or a keyword.
808 * *p is updated to point at the first character after the current token.
810 static void get_token(char **p, struct token *t, enum lex_state state)
816 /* eat non EOL whitespace */
821 * eat comments. note that string literals can't begin with #, but
822 * can contain a # after their first character.
825 while (*c && *c != '\n')
832 } else if (*c == '\0') {
835 } else if (state == L_SLITERAL) {
836 get_string(&c, t, '\n', 0);
837 } else if (state == L_KEYWORD) {
839 * when we expect a keyword, we first get the next string
840 * token delimited by whitespace, and then check if it
841 * matches a keyword in our keyword list. if it does, it's
842 * converted to a keyword token of the appropriate type, and
843 * if not, it remains a string token.
845 get_string(&c, t, ' ', 1);
853 * Increment *c until we get to the end of the current line, or EOF.
855 static void eol_or_eof(char **c)
857 while (**c && **c != '\n')
862 * All of these parse_* functions share some common behavior.
864 * They finish with *c pointing after the token they parse, and return 1 on
865 * success, or < 0 on error.
869 * Parse a string literal and store a pointer it at *dst. String literals
870 * terminate at the end of the line.
872 static int parse_sliteral(char **c, char **dst)
877 get_token(c, &t, L_SLITERAL);
879 if (t.type != T_STRING) {
880 printf("Expected string literal: %.*s\n", (int)(*c - s), s);
890 * Parse a base 10 (unsigned) integer and store it at *dst.
892 static int parse_integer(char **c, int *dst)
898 get_token(c, &t, L_SLITERAL);
900 if (t.type != T_STRING) {
901 printf("Expected string: %.*s\n", (int)(*c - s), s);
905 if (strict_strtoul(t.val, 10, &temp) < 0) {
906 printf("Expected unsigned integer: %s\n", t.val);
917 static int parse_pxefile_top(char *p, struct pxe_menu *cfg, int nest_level);
920 * Parse an include statement, and retrieve and parse the file it mentions.
922 * base should point to a location where it's safe to store the file, and
923 * nest_level should indicate how many nested includes have occurred. For this
924 * include, nest_level has already been incremented and doesn't need to be
927 static int handle_include(char **c, char *base,
928 struct pxe_menu *cfg, int nest_level)
934 err = parse_sliteral(c, &include_path);
937 printf("Expected include path: %.*s\n",
942 err = get_pxe_file(include_path, base);
945 printf("Couldn't retrieve %s\n", include_path);
949 return parse_pxefile_top(base, cfg, nest_level);
953 * Parse lines that begin with 'menu'.
955 * b and nest are provided to handle the 'menu include' case.
957 * b should be the address where the file currently being parsed is stored.
959 * nest_level should be 1 when parsing the top level pxe file, 2 when parsing
960 * a file it includes, 3 when parsing a file included by that file, and so on.
962 static int parse_menu(char **c, struct pxe_menu *cfg, char *b, int nest_level)
968 get_token(c, &t, L_KEYWORD);
972 err = parse_sliteral(c, &cfg->title);
977 err = handle_include(c, b + strlen(b) + 1, cfg,
982 printf("Ignoring malformed menu command: %.*s\n",
995 * Handles parsing a 'menu line' when we're parsing a label.
997 static int parse_label_menu(char **c, struct pxe_menu *cfg,
998 struct pxe_label *label)
1005 get_token(c, &t, L_KEYWORD);
1009 if (cfg->default_label)
1010 free(cfg->default_label);
1012 cfg->default_label = strdup(label->name);
1014 if (!cfg->default_label)
1019 parse_sliteral(c, &label->menu);
1022 printf("Ignoring malformed menu command: %.*s\n",
1032 * Parses a label and adds it to the list of labels for a menu.
1034 * A label ends when we either get to the end of a file, or
1035 * get some input we otherwise don't have a handler defined
1039 static int parse_label(char **c, struct pxe_menu *cfg)
1044 struct pxe_label *label;
1047 label = label_create();
1051 err = parse_sliteral(c, &label->name);
1053 printf("Expected label name: %.*s\n", (int)(*c - s), s);
1054 label_destroy(label);
1058 list_add_tail(&label->list, &cfg->labels);
1062 get_token(c, &t, L_KEYWORD);
1067 err = parse_label_menu(c, cfg, label);
1072 err = parse_sliteral(c, &label->kernel);
1076 err = parse_sliteral(c, &label->append);
1079 s = strstr(label->append, "initrd=");
1083 len = (int)(strchr(s, ' ') - s);
1084 label->initrd = malloc(len + 1);
1085 strncpy(label->initrd, s, len);
1086 label->initrd[len] = '\0';
1092 err = parse_sliteral(c, &label->initrd);
1096 err = parse_integer(c, &label->localboot);
1104 * put the token back! we don't want it - it's the end
1105 * of a label and whatever token this is, it's
1106 * something for the menu level context to handle.
1118 * This 16 comes from the limit pxelinux imposes on nested includes.
1120 * There is no reason at all we couldn't do more, but some limit helps prevent
1121 * infinite (until crash occurs) recursion if a file tries to include itself.
1123 #define MAX_NEST_LEVEL 16
1126 * Entry point for parsing a menu file. nest_level indicates how many times
1127 * we've nested in includes. It will be 1 for the top level menu file.
1129 * Returns 1 on success, < 0 on error.
1131 static int parse_pxefile_top(char *p, struct pxe_menu *cfg, int nest_level)
1134 char *s, *b, *label_name;
1139 if (nest_level > MAX_NEST_LEVEL) {
1140 printf("Maximum nesting (%d) exceeded\n", MAX_NEST_LEVEL);
1147 get_token(&p, &t, L_KEYWORD);
1152 err = parse_menu(&p, cfg, b, nest_level);
1156 err = parse_integer(&p, &cfg->timeout);
1160 err = parse_label(&p, cfg);
1164 err = parse_sliteral(&p, &label_name);
1167 if (cfg->default_label)
1168 free(cfg->default_label);
1170 cfg->default_label = label_name;
1176 err = handle_include(&p, b + ALIGN(strlen(b), 4), cfg,
1181 err = parse_integer(&p, &cfg->prompt);
1191 printf("Ignoring unknown command: %.*s\n",
1202 * Free the memory used by a pxe_menu and its labels.
1204 static void destroy_pxe_menu(struct pxe_menu *cfg)
1206 struct list_head *pos, *n;
1207 struct pxe_label *label;
1212 if (cfg->default_label)
1213 free(cfg->default_label);
1215 list_for_each_safe(pos, n, &cfg->labels) {
1216 label = list_entry(pos, struct pxe_label, list);
1218 label_destroy(label);
1225 * Entry point for parsing a pxe file. This is only used for the top level
1228 * Returns NULL if there is an error, otherwise, returns a pointer to a
1229 * pxe_menu struct populated with the results of parsing the pxe file (and any
1230 * files it includes). The resulting pxe_menu struct can be free()'d by using
1231 * the destroy_pxe_menu() function.
1233 static struct pxe_menu *parse_pxefile(char *menucfg)
1235 struct pxe_menu *cfg;
1237 cfg = malloc(sizeof(struct pxe_menu));
1242 memset(cfg, 0, sizeof(struct pxe_menu));
1244 INIT_LIST_HEAD(&cfg->labels);
1246 if (parse_pxefile_top(menucfg, cfg, 1) < 0) {
1247 destroy_pxe_menu(cfg);
1255 * Converts a pxe_menu struct into a menu struct for use with U-boot's generic
1258 static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg)
1260 struct pxe_label *label;
1261 struct list_head *pos;
1266 * Create a menu and add items for all the labels.
1268 m = menu_create(cfg->title, cfg->timeout, cfg->prompt, label_print);
1273 list_for_each(pos, &cfg->labels) {
1274 label = list_entry(pos, struct pxe_label, list);
1276 if (menu_item_add(m, label->name, label) != 1) {
1283 * After we've created items for each label in the menu, set the
1284 * menu's default label if one was specified.
1286 if (cfg->default_label) {
1287 err = menu_default_set(m, cfg->default_label);
1289 if (err != -ENOENT) {
1294 printf("Missing default: %s\n", cfg->default_label);
1302 * Try to boot any labels we have yet to attempt to boot.
1304 static void boot_unattempted_labels(struct pxe_menu *cfg)
1306 struct list_head *pos;
1307 struct pxe_label *label;
1309 list_for_each(pos, &cfg->labels) {
1310 label = list_entry(pos, struct pxe_label, list);
1312 if (!label->attempted)
1318 * Boot the system as prescribed by a pxe_menu.
1320 * Use the menu system to either get the user's choice or the default, based
1321 * on config or user input. If there is no default or user's choice,
1322 * attempted to boot labels in the order they were given in pxe files.
1323 * If the default or user's choice fails to boot, attempt to boot other
1324 * labels in the order they were given in pxe files.
1326 * If this function returns, there weren't any labels that successfully
1327 * booted, or the user interrupted the menu selection via ctrl+c.
1329 static void handle_pxe_menu(struct pxe_menu *cfg)
1335 m = pxe_menu_to_menu(cfg);
1339 err = menu_get_choice(m, &choice);
1344 * err == 1 means we got a choice back from menu_get_choice.
1346 * err == -ENOENT if the menu was setup to select the default but no
1347 * default was set. in that case, we should continue trying to boot
1348 * labels that haven't been attempted yet.
1350 * otherwise, the user interrupted or there was some other error and
1356 else if (err != -ENOENT)
1359 boot_unattempted_labels(cfg);
1363 * Boots a system using a pxe file
1365 * Returns 0 on success, 1 on error.
1368 do_pxe_boot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1370 unsigned long pxefile_addr_r;
1371 struct pxe_menu *cfg;
1372 char *pxefile_addr_str;
1374 do_getfile = do_get_tftp;
1377 pxefile_addr_str = from_env("pxefile_addr_r");
1378 if (!pxefile_addr_str)
1381 } else if (argc == 2) {
1382 pxefile_addr_str = argv[1];
1384 return CMD_RET_USAGE;
1387 if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) {
1388 printf("Invalid pxefile address: %s\n", pxefile_addr_str);
1392 cfg = parse_pxefile((char *)(pxefile_addr_r));
1395 printf("Error parsing config file\n");
1399 handle_pxe_menu(cfg);
1401 destroy_pxe_menu(cfg);
1406 static cmd_tbl_t cmd_pxe_sub[] = {
1407 U_BOOT_CMD_MKENT(get, 1, 1, do_pxe_get, "", ""),
1408 U_BOOT_CMD_MKENT(boot, 2, 1, do_pxe_boot, "", "")
1411 int do_pxe(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1416 return CMD_RET_USAGE;
1418 /* drop initial "pxe" arg */
1422 cp = find_cmd_tbl(argv[0], cmd_pxe_sub, ARRAY_SIZE(cmd_pxe_sub));
1425 return cp->cmd(cmdtp, flag, argc, argv);
1427 return CMD_RET_USAGE;
1432 "commands to get and boot from pxe files",
1433 "get - try to retrieve a pxe file using tftp\npxe "
1434 "boot [pxefile_addr_r] - boot from the pxe file at pxefile_addr_r\n"
1438 * Boots a system using a local disk syslinux/extlinux file
1440 * Returns 0 on success, 1 on error.
1442 int do_sysboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1444 unsigned long pxefile_addr_r;
1445 struct pxe_menu *cfg;
1446 char *pxefile_addr_str;
1450 if (strstr(argv[1], "-p")) {
1457 return cmd_usage(cmdtp);
1460 pxefile_addr_str = from_env("pxefile_addr_r");
1461 if (!pxefile_addr_str)
1464 pxefile_addr_str = argv[4];
1468 filename = getenv("bootfile");
1471 setenv("bootfile", filename);
1474 if (strstr(argv[3], "ext2"))
1475 do_getfile = do_get_ext2;
1476 else if (strstr(argv[3], "fat"))
1477 do_getfile = do_get_fat;
1479 printf("Invalid filesystem: %s\n", argv[3]);
1482 fs_argv[1] = argv[1];
1483 fs_argv[2] = argv[2];
1485 if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) {
1486 printf("Invalid pxefile address: %s\n", pxefile_addr_str);
1490 if (get_pxe_file(filename, (void *)pxefile_addr_r) < 0) {
1491 printf("Error reading config file\n");
1495 cfg = parse_pxefile((char *)(pxefile_addr_r));
1498 printf("Error parsing config file\n");
1505 handle_pxe_menu(cfg);
1507 destroy_pxe_menu(cfg);
1513 sysboot, 7, 1, do_sysboot,
1514 "command to get and boot from syslinux files",
1515 "[-p] <interface> <dev[:part]> <ext2|fat> [addr] [filename]\n"
1516 " - load and parse syslinux menu file 'filename' from ext2 or fat\n"
1517 " filesystem on 'dev' on 'interface' to address 'addr'"