Blame view
cmd/pxe_utils.c
28.9 KB
2373cba3d cmd: Prepare sysb... |
1 2 3 4 5 6 7 8 |
// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2010-2011 Calxeda, Inc. * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. */ #include <common.h> #include <env.h> |
8e8ccfe1a common: Move the ... |
9 |
#include <image.h> |
2373cba3d cmd: Prepare sysb... |
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 |
#include <malloc.h> #include <mapmem.h> #include <lcd.h> #include <linux/string.h> #include <linux/ctype.h> #include <errno.h> #include <linux/list.h> #include <splash.h> #include <asm/io.h> #include "menu.h" #include "cli.h" #include "pxe_utils.h" |
2c4e067d4 cmd: pxe: Increas... |
25 |
#define MAX_TFTP_PATH_LEN 512 |
2373cba3d cmd: Prepare sysb... |
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 |
bool is_pxe; /* * Convert an ethaddr from the environment to the format used by pxelinux * filenames based on mac addresses. Convert's ':' to '-', and adds "01-" to * the beginning of the ethernet address to indicate a hardware type of * Ethernet. Also converts uppercase hex characters into lowercase, to match * pxelinux's behavior. * * Returns 1 for success, -ENOENT if 'ethaddr' is undefined in the * environment, or some other value < 0 on error. */ int format_mac_pxe(char *outbuf, size_t outbuf_len) { uchar ethaddr[6]; if (outbuf_len < 21) { printf("outbuf is too small (%zd < 21) ", outbuf_len); return -EINVAL; } if (!eth_env_get_enetaddr_by_index("eth", eth_get_dev_index(), ethaddr)) return -ENOENT; sprintf(outbuf, "01-%02x-%02x-%02x-%02x-%02x-%02x", ethaddr[0], ethaddr[1], ethaddr[2], ethaddr[3], ethaddr[4], ethaddr[5]); return 1; } /* * Returns the directory the file specified in the bootfile env variable is * in. If bootfile isn't defined in the environment, return NULL, which should * be interpreted as "don't prepend anything to paths". */ static int get_bootfile_path(const char *file_path, char *bootfile_path, size_t bootfile_path_size) { char *bootfile, *last_slash; size_t path_len = 0; /* Only syslinux allows absolute paths */ if (file_path[0] == '/' && !is_pxe) goto ret; bootfile = from_env("bootfile"); if (!bootfile) goto ret; last_slash = strrchr(bootfile, '/'); |
8cb22a66a cmd: pxe_utils: F... |
81 |
if (!last_slash) |
2373cba3d cmd: Prepare sysb... |
82 83 84 85 86 87 88 |
goto ret; path_len = (last_slash - bootfile) + 1; if (bootfile_path_size < path_len) { printf("bootfile_path too small. (%zd < %zd) ", |
8cb22a66a cmd: pxe_utils: F... |
89 |
bootfile_path_size, path_len); |
2373cba3d cmd: Prepare sysb... |
90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 |
return -1; } strncpy(bootfile_path, bootfile, path_len); ret: bootfile_path[path_len] = '\0'; return 1; } int (*do_getfile)(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr); /* * As in pxelinux, paths to files referenced from files we retrieve are * relative to the location of bootfile. get_relfile takes such a path and * joins it with the bootfile path to get the full path to the target file. If * the bootfile path is NULL, we use file_path as is. * * Returns 1 for success, or < 0 on error. */ static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path, |
8cb22a66a cmd: pxe_utils: F... |
113 |
unsigned long file_addr) |
2373cba3d cmd: Prepare sysb... |
114 115 |
{ size_t path_len; |
8cb22a66a cmd: pxe_utils: F... |
116 |
char relfile[MAX_TFTP_PATH_LEN + 1]; |
2373cba3d cmd: Prepare sysb... |
117 118 119 120 121 122 123 124 125 126 127 128 |
char addr_buf[18]; int err; err = get_bootfile_path(file_path, relfile, sizeof(relfile)); if (err < 0) return err; path_len = strlen(file_path); path_len += strlen(relfile); if (path_len > MAX_TFTP_PATH_LEN) { |
8cb22a66a cmd: pxe_utils: F... |
129 130 |
printf("Base path too long (%s%s) ", relfile, file_path); |
2373cba3d cmd: Prepare sysb... |
131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 |
return -ENAMETOOLONG; } strcat(relfile, file_path); printf("Retrieving file: %s ", relfile); sprintf(addr_buf, "%lx", file_addr); return do_getfile(cmdtp, relfile, addr_buf); } /* * Retrieve the file at 'file_path' to the locate given by 'file_addr'. If * 'bootfile' was specified in the environment, the path to bootfile will be * prepended to 'file_path' and the resulting path will be used. * * Returns 1 on success, or < 0 for error. */ int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path, |
8cb22a66a cmd: pxe_utils: F... |
153 |
unsigned long file_addr) |
2373cba3d cmd: Prepare sysb... |
154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 |
{ unsigned long config_file_size; char *tftp_filesize; int err; char *buf; err = get_relfile(cmdtp, file_path, file_addr); if (err < 0) return err; /* * the file comes without a NUL byte at the end, so find out its size * and add the NUL byte. */ tftp_filesize = from_env("filesize"); if (!tftp_filesize) return -ENOENT; if (strict_strtoul(tftp_filesize, 16, &config_file_size) < 0) return -EINVAL; buf = map_sysmem(file_addr + config_file_size, 1); *buf = '\0'; unmap_sysmem(buf); return 1; } #define PXELINUX_DIR "pxelinux.cfg/" |
2373cba3d cmd: Prepare sysb... |
185 186 187 188 189 190 191 192 |
/* * Retrieves a file in the 'pxelinux.cfg' folder. Since this uses get_pxe_file * to do the hard work, the location of the 'pxelinux.cfg' folder is generated * from the bootfile path, as described above. * * Returns 1 on success or < 0 on error. */ int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file, |
8cb22a66a cmd: pxe_utils: F... |
193 |
unsigned long pxefile_addr_r) |
2373cba3d cmd: Prepare sysb... |
194 195 |
{ size_t base_len = strlen(PXELINUX_DIR); |
8cb22a66a cmd: pxe_utils: F... |
196 |
char path[MAX_TFTP_PATH_LEN + 1]; |
2373cba3d cmd: Prepare sysb... |
197 198 199 200 |
if (base_len + strlen(file) > MAX_TFTP_PATH_LEN) { printf("path (%s%s) too long, skipping ", |
8cb22a66a cmd: pxe_utils: F... |
201 |
PXELINUX_DIR, file); |
2373cba3d cmd: Prepare sysb... |
202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 |
return -ENAMETOOLONG; } sprintf(path, PXELINUX_DIR "%s", file); return get_pxe_file(cmdtp, path, pxefile_addr_r); } /* * Wrapper to make it easier to store the file at file_path in the location * specified by envaddr_name. file_path will be joined to the bootfile path, * if any is specified. * * Returns 1 on success or < 0 on error. */ |
8cb22a66a cmd: pxe_utils: F... |
217 218 |
static int get_relfile_envaddr(cmd_tbl_t *cmdtp, const char *file_path, const char *envaddr_name) |
2373cba3d cmd: Prepare sysb... |
219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 |
{ unsigned long file_addr; char *envaddr; envaddr = from_env(envaddr_name); if (!envaddr) return -ENOENT; if (strict_strtoul(envaddr, 16, &file_addr) < 0) return -EINVAL; return get_relfile(cmdtp, file_path, file_addr); } /* * Allocates memory for and initializes a pxe_label. This uses malloc, so the * result must be free()'d to reclaim the memory. * * Returns NULL if malloc fails. */ static struct pxe_label *label_create(void) { struct pxe_label *label; label = malloc(sizeof(struct pxe_label)); if (!label) return NULL; memset(label, 0, sizeof(struct pxe_label)); return label; } /* * Free the memory used by a pxe_label, including that used by its name, * kernel, append and initrd members, if they're non NULL. * * So - be sure to only use dynamically allocated memory for the members of * the pxe_label struct, unless you want to clean it up first. These are * currently only created by the pxe file parsing code. */ static void label_destroy(struct pxe_label *label) { if (label->name) free(label->name); if (label->kernel) free(label->kernel); if (label->config) free(label->config); if (label->append) free(label->append); if (label->initrd) free(label->initrd); if (label->fdt) free(label->fdt); if (label->fdtdir) free(label->fdtdir); free(label); } /* * Print a label and its string members if they're defined. * * This is passed as a callback to the menu code for displaying each * menu entry. */ static void label_print(void *data) { struct pxe_label *label = data; const char *c = label->menu ? label->menu : label->name; printf("%s:\t%s ", label->num, c); } /* * Boot a label that specified 'localboot'. This requires that the 'localcmd' * environment variable is defined. Its contents will be executed as U-Boot * command. If the label specified an 'append' line, its contents will be * used to overwrite the contents of the 'bootargs' environment variable prior * to running 'localcmd'. * * Returns 1 on success or < 0 on error. */ static int label_localboot(struct pxe_label *label) { char *localcmd; localcmd = from_env("localcmd"); if (!localcmd) return -ENOENT; if (label->append) { char bootargs[CONFIG_SYS_CBSIZE]; cli_simple_process_macros(label->append, bootargs); env_set("bootargs", bootargs); } debug("running: %s ", localcmd); return run_command_list(localcmd, strlen(localcmd), 0); } /* * Boot according to the contents of a pxe_label. * * If we can't boot for any reason, we return. A successful boot never * returns. * * The kernel will be stored in the location given by the 'kernel_addr_r' * environment variable. * * If the label specifies an initrd file, it will be stored in the location * given by the 'ramdisk_addr_r' environment variable. * * If the label specifies an 'append' line, its contents will overwrite that * of the 'bootargs' environment variable. */ static int label_boot(cmd_tbl_t *cmdtp, struct pxe_label *label) { char *bootm_argv[] = { "bootm", NULL, NULL, NULL, NULL }; char initrd_str[28]; char mac_str[29] = ""; char ip_str[68] = ""; char *fit_addr = NULL; int bootm_argc = 2; int len = 0; ulong kernel_addr; void *buf; label_print(label); label->attempted = 1; if (label->localboot) { if (label->localboot_val >= 0) label_localboot(label); return 0; } |
8cb22a66a cmd: pxe_utils: F... |
370 |
if (!label->kernel) { |
2373cba3d cmd: Prepare sysb... |
371 372 |
printf("No kernel given, skipping %s ", |
8cb22a66a cmd: pxe_utils: F... |
373 |
label->name); |
2373cba3d cmd: Prepare sysb... |
374 375 376 377 378 379 380 |
return 1; } if (label->initrd) { if (get_relfile_envaddr(cmdtp, label->initrd, "ramdisk_addr_r") < 0) { printf("Skipping %s for failure retrieving initrd ", |
8cb22a66a cmd: pxe_utils: F... |
381 |
label->name); |
2373cba3d cmd: Prepare sysb... |
382 383 384 385 386 387 388 389 390 391 392 393 394 |
return 1; } bootm_argv[2] = initrd_str; strncpy(bootm_argv[2], env_get("ramdisk_addr_r"), 18); strcat(bootm_argv[2], ":"); strncat(bootm_argv[2], env_get("filesize"), 9); bootm_argc = 3; } if (get_relfile_envaddr(cmdtp, label->kernel, "kernel_addr_r") < 0) { printf("Skipping %s for failure retrieving kernel ", |
8cb22a66a cmd: pxe_utils: F... |
395 |
label->name); |
2373cba3d cmd: Prepare sysb... |
396 397 398 399 400 401 402 403 404 405 406 407 |
return 1; } if (label->ipappend & 0x1) { sprintf(ip_str, " ip=%s:%s:%s:%s", env_get("ipaddr"), env_get("serverip"), env_get("gatewayip"), env_get("netmask")); } #ifdef CONFIG_CMD_NET if (label->ipappend & 0x2) { int err; |
8cb22a66a cmd: pxe_utils: F... |
408 |
|
2373cba3d cmd: Prepare sysb... |
409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 |
strcpy(mac_str, " BOOTIF="); err = format_mac_pxe(mac_str + 8, sizeof(mac_str) - 8); if (err < 0) mac_str[0] = '\0'; } #endif if ((label->ipappend & 0x3) || label->append) { char bootargs[CONFIG_SYS_CBSIZE] = ""; char finalbootargs[CONFIG_SYS_CBSIZE]; if (strlen(label->append ?: "") + strlen(ip_str) + strlen(mac_str) + 1 > sizeof(bootargs)) { printf("bootarg overflow %zd+%zd+%zd+1 > %zd ", strlen(label->append ?: ""), strlen(ip_str), strlen(mac_str), sizeof(bootargs)); return 1; |
2373cba3d cmd: Prepare sysb... |
428 |
} |
8cb22a66a cmd: pxe_utils: F... |
429 430 431 432 433 434 435 436 437 438 439 |
if (label->append) strncpy(bootargs, label->append, sizeof(bootargs)); strcat(bootargs, ip_str); strcat(bootargs, mac_str); cli_simple_process_macros(bootargs, finalbootargs); env_set("bootargs", finalbootargs); printf("append: %s ", finalbootargs); |
2373cba3d cmd: Prepare sysb... |
440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 |
} bootm_argv[1] = env_get("kernel_addr_r"); /* for FIT, append the configuration identifier */ if (label->config) { int len = strlen(bootm_argv[1]) + strlen(label->config) + 1; fit_addr = malloc(len); if (!fit_addr) { printf("malloc fail (FIT address) "); return 1; } snprintf(fit_addr, len, "%s%s", bootm_argv[1], label->config); bootm_argv[1] = fit_addr; } /* * fdt usage is optional: * It handles the following scenarios. All scenarios are exclusive * * Scenario 1: If fdt_addr_r specified and "fdt" label is defined in * pxe file, retrieve fdt blob from server. Pass fdt_addr_r to bootm, * and adjust argc appropriately. * * Scenario 2: If there is an fdt_addr specified, pass it along to * bootm, and adjust argc appropriately. * * Scenario 3: fdt blob is not available. */ bootm_argv[3] = env_get("fdt_addr_r"); /* if fdt label is defined then get fdt from server */ if (bootm_argv[3]) { char *fdtfile = NULL; char *fdtfilefree = NULL; if (label->fdt) { fdtfile = label->fdt; } else if (label->fdtdir) { char *f1, *f2, *f3, *f4, *slash; f1 = env_get("fdtfile"); if (f1) { f2 = ""; f3 = ""; f4 = ""; } else { /* * For complex cases where this code doesn't * generate the correct filename, the board * code should set $fdtfile during early boot, * or the boot scripts should set $fdtfile * before invoking "pxe" or "sysboot". */ f1 = env_get("soc"); f2 = "-"; f3 = env_get("board"); f4 = ".dtb"; } len = strlen(label->fdtdir); if (!len) slash = "./"; else if (label->fdtdir[len - 1] != '/') slash = "/"; else slash = ""; len = strlen(label->fdtdir) + strlen(slash) + strlen(f1) + strlen(f2) + strlen(f3) + strlen(f4) + 1; fdtfilefree = malloc(len); if (!fdtfilefree) { printf("malloc fail (FDT filename) "); goto cleanup; } snprintf(fdtfilefree, len, "%s%s%s%s%s%s", label->fdtdir, slash, f1, f2, f3, f4); fdtfile = fdtfilefree; } if (fdtfile) { |
8cb22a66a cmd: pxe_utils: F... |
525 526 |
int err = get_relfile_envaddr(cmdtp, fdtfile, "fdt_addr_r"); |
2373cba3d cmd: Prepare sysb... |
527 528 529 530 |
free(fdtfilefree); if (err < 0) { printf("Skipping %s for failure retrieving fdt ", |
8cb22a66a cmd: pxe_utils: F... |
531 |
label->name); |
2373cba3d cmd: Prepare sysb... |
532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 |
goto cleanup; } } else { bootm_argv[3] = NULL; } } if (!bootm_argv[3]) bootm_argv[3] = env_get("fdt_addr"); if (bootm_argv[3]) { if (!bootm_argv[2]) bootm_argv[2] = "-"; bootm_argc = 4; } kernel_addr = genimg_get_kernel_addr(bootm_argv[1]); buf = map_sysmem(kernel_addr, 0); /* Try bootm for legacy and FIT format image */ if (genimg_get_format(buf) != IMAGE_FORMAT_INVALID) do_bootm(cmdtp, 0, bootm_argc, bootm_argv); #ifdef CONFIG_CMD_BOOTI /* Try booting an AArch64 Linux kernel image */ else do_booti(cmdtp, 0, bootm_argc, bootm_argv); #elif defined(CONFIG_CMD_BOOTZ) /* Try booting a Image */ else do_bootz(cmdtp, 0, bootm_argc, bootm_argv); #endif unmap_sysmem(buf); cleanup: if (fit_addr) free(fit_addr); return 1; } /* * Tokens for the pxe file parser. */ enum token_type { T_EOL, T_STRING, T_EOF, T_MENU, T_TITLE, T_TIMEOUT, T_LABEL, T_KERNEL, T_LINUX, T_APPEND, T_INITRD, T_LOCALBOOT, T_DEFAULT, T_PROMPT, T_INCLUDE, T_FDT, T_FDTDIR, T_ONTIMEOUT, T_IPAPPEND, T_BACKGROUND, T_INVALID }; /* * A token - given by a value and a type. */ struct token { char *val; enum token_type type; }; /* * Keywords recognized. */ static const struct token keywords[] = { {"menu", T_MENU}, {"title", T_TITLE}, {"timeout", T_TIMEOUT}, {"default", T_DEFAULT}, {"prompt", T_PROMPT}, {"label", T_LABEL}, {"kernel", T_KERNEL}, {"linux", T_LINUX}, {"localboot", T_LOCALBOOT}, {"append", T_APPEND}, {"initrd", T_INITRD}, {"include", T_INCLUDE}, {"devicetree", T_FDT}, {"fdt", T_FDT}, {"devicetreedir", T_FDTDIR}, {"fdtdir", T_FDTDIR}, {"ontimeout", T_ONTIMEOUT,}, {"ipappend", T_IPAPPEND,}, {"background", T_BACKGROUND,}, {NULL, T_INVALID} }; /* * Since pxe(linux) files don't have a token to identify the start of a * literal, we have to keep track of when we're in a state where a literal is * expected vs when we're in a state a keyword is expected. */ enum lex_state { L_NORMAL = 0, L_KEYWORD, L_SLITERAL }; /* * get_string retrieves a string from *p and stores it as a token in * *t. * * get_string used for scanning both string literals and keywords. * * Characters from *p are copied into t-val until a character equal to * delim is found, or a NUL byte is reached. If delim has the special value of * ' ', any whitespace character will be used as a delimiter. * * If lower is unequal to 0, uppercase characters will be converted to * lowercase in the result. This is useful to make keywords case * insensitive. * * The location of *p is updated to point to the first character after the end * of the token - the ending delimiter. * * On success, the new value of t->val is returned. Memory for t->val is * allocated using malloc and must be free()'d to reclaim it. If insufficient * memory is available, NULL is returned. */ static char *get_string(char **p, struct token *t, char delim, int lower) { char *b, *e; size_t len, i; /* * b and e both start at the beginning of the input stream. * * e is incremented until we find the ending delimiter, or a NUL byte * is reached. Then, we take e - b to find the length of the token. */ |
8cb22a66a cmd: pxe_utils: F... |
674 675 |
b = *p; e = *p; |
2373cba3d cmd: Prepare sysb... |
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 |
while (*e) { if ((delim == ' ' && isspace(*e)) || delim == *e) break; e++; } len = e - b; /* * Allocate memory to hold the string, and copy it in, converting * characters to lowercase if lower is != 0. */ t->val = malloc(len + 1); if (!t->val) return NULL; for (i = 0; i < len; i++, b++) { if (lower) t->val[i] = tolower(*b); else t->val[i] = *b; } t->val[len] = '\0'; /* * Update *p so the caller knows where to continue scanning. */ *p = e; t->type = T_STRING; return t->val; } /* * Populate a keyword token with a type and value. */ static void get_keyword(struct token *t) { int i; for (i = 0; keywords[i].val; i++) { if (!strcmp(t->val, keywords[i].val)) { t->type = keywords[i].type; break; } } } /* * Get the next token. We have to keep track of which state we're in to know * if we're looking to get a string literal or a keyword. * * *p is updated to point at the first character after the current token. */ static void get_token(char **p, struct token *t, enum lex_state state) { char *c = *p; t->type = T_INVALID; /* eat non EOL whitespace */ while (isblank(*c)) c++; /* * eat comments. note that string literals can't begin with #, but * can contain a # after their first character. */ if (*c == '#') { while (*c && *c != ' ') c++; } if (*c == ' ') { t->type = T_EOL; c++; } else if (*c == '\0') { t->type = T_EOF; c++; } else if (state == L_SLITERAL) { get_string(&c, t, ' ', 0); } else if (state == L_KEYWORD) { /* * when we expect a keyword, we first get the next string * token delimited by whitespace, and then check if it * matches a keyword in our keyword list. if it does, it's * converted to a keyword token of the appropriate type, and * if not, it remains a string token. */ get_string(&c, t, ' ', 1); get_keyword(t); } *p = c; } /* * Increment *c until we get to the end of the current line, or EOF. */ static void eol_or_eof(char **c) { while (**c && **c != ' ') (*c)++; } /* * All of these parse_* functions share some common behavior. * * They finish with *c pointing after the token they parse, and return 1 on * success, or < 0 on error. */ /* * Parse a string literal and store a pointer it at *dst. String literals * terminate at the end of the line. */ static int parse_sliteral(char **c, char **dst) { struct token t; char *s = *c; get_token(c, &t, L_SLITERAL); if (t.type != T_STRING) { printf("Expected string literal: %.*s ", (int)(*c - s), s); return -EINVAL; } *dst = t.val; return 1; } /* * Parse a base 10 (unsigned) integer and store it at *dst. */ static int parse_integer(char **c, int *dst) { struct token t; char *s = *c; get_token(c, &t, L_SLITERAL); if (t.type != T_STRING) { printf("Expected string: %.*s ", (int)(*c - s), s); return -EINVAL; } *dst = simple_strtol(t.val, NULL, 10); free(t.val); return 1; } static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base, |
8cb22a66a cmd: pxe_utils: F... |
841 |
struct pxe_menu *cfg, int nest_level); |
2373cba3d cmd: Prepare sysb... |
842 843 844 845 846 847 848 849 850 851 |
/* * Parse an include statement, and retrieve and parse the file it mentions. * * base should point to a location where it's safe to store the file, and * nest_level should indicate how many nested includes have occurred. For this * include, nest_level has already been incremented and doesn't need to be * incremented here. */ static int handle_include(cmd_tbl_t *cmdtp, char **c, unsigned long base, |
8cb22a66a cmd: pxe_utils: F... |
852 |
struct pxe_menu *cfg, int nest_level) |
2373cba3d cmd: Prepare sysb... |
853 854 855 856 857 858 859 860 861 862 |
{ char *include_path; char *s = *c; int err; char *buf; int ret; err = parse_sliteral(c, &include_path); if (err < 0) { |
8cb22a66a cmd: pxe_utils: F... |
863 864 |
printf("Expected include path: %.*s ", (int)(*c - s), s); |
2373cba3d cmd: Prepare sysb... |
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 |
return err; } err = get_pxe_file(cmdtp, include_path, base); if (err < 0) { printf("Couldn't retrieve %s ", include_path); return err; } buf = map_sysmem(base, 0); ret = parse_pxefile_top(cmdtp, buf, base, cfg, nest_level); unmap_sysmem(buf); return ret; } /* * Parse lines that begin with 'menu'. * * base and nest are provided to handle the 'menu include' case. * * base should point to a location where it's safe to store the included file. * * nest_level should be 1 when parsing the top level pxe file, 2 when parsing * a file it includes, 3 when parsing a file included by that file, and so on. */ static int parse_menu(cmd_tbl_t *cmdtp, char **c, struct pxe_menu *cfg, |
8cb22a66a cmd: pxe_utils: F... |
894 |
unsigned long base, int nest_level) |
2373cba3d cmd: Prepare sysb... |
895 896 897 898 899 900 901 902 903 904 905 906 907 908 |
{ struct token t; char *s = *c; int err = 0; get_token(c, &t, L_KEYWORD); switch (t.type) { case T_TITLE: err = parse_sliteral(c, &cfg->title); break; case T_INCLUDE: |
8cb22a66a cmd: pxe_utils: F... |
909 |
err = handle_include(cmdtp, c, base, cfg, nest_level + 1); |
2373cba3d cmd: Prepare sysb... |
910 911 912 913 914 915 916 917 918 |
break; case T_BACKGROUND: err = parse_sliteral(c, &cfg->bmp); break; default: printf("Ignoring malformed menu command: %.*s ", |
8cb22a66a cmd: pxe_utils: F... |
919 |
(int)(*c - s), s); |
2373cba3d cmd: Prepare sysb... |
920 921 922 923 924 925 926 927 928 929 930 931 932 933 |
} if (err < 0) return err; eol_or_eof(c); return 1; } /* * Handles parsing a 'menu line' when we're parsing a label. */ static int parse_label_menu(char **c, struct pxe_menu *cfg, |
8cb22a66a cmd: pxe_utils: F... |
934 |
struct pxe_label *label) |
2373cba3d cmd: Prepare sysb... |
935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 |
{ struct token t; char *s; s = *c; get_token(c, &t, L_KEYWORD); switch (t.type) { case T_DEFAULT: if (!cfg->default_label) cfg->default_label = strdup(label->name); if (!cfg->default_label) return -ENOMEM; break; case T_LABEL: parse_sliteral(c, &label->menu); break; default: printf("Ignoring malformed menu command: %.*s ", |
8cb22a66a cmd: pxe_utils: F... |
958 |
(int)(*c - s), s); |
2373cba3d cmd: Prepare sysb... |
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 |
} eol_or_eof(c); return 0; } /* * Handles parsing a 'kernel' label. * expecting "filename" or "<fit_filename>#cfg" */ static int parse_label_kernel(char **c, struct pxe_label *label) { char *s; int err; err = parse_sliteral(c, &label->kernel); if (err < 0) return err; s = strstr(label->kernel, "#"); if (!s) return 1; label->config = malloc(strlen(s) + 1); if (!label->config) return -ENOMEM; strcpy(label->config, s); *s = 0; return 1; } /* * Parses a label and adds it to the list of labels for a menu. * * A label ends when we either get to the end of a file, or * get some input we otherwise don't have a handler defined * for. * */ static int parse_label(char **c, struct pxe_menu *cfg) { struct token t; int len; char *s = *c; struct pxe_label *label; int err; label = label_create(); if (!label) return -ENOMEM; err = parse_sliteral(c, &label->name); if (err < 0) { printf("Expected label name: %.*s ", (int)(*c - s), s); label_destroy(label); return -EINVAL; } list_add_tail(&label->list, &cfg->labels); while (1) { s = *c; get_token(c, &t, L_KEYWORD); err = 0; switch (t.type) { case T_MENU: err = parse_label_menu(c, cfg, label); break; case T_KERNEL: case T_LINUX: err = parse_label_kernel(c, label); break; case T_APPEND: err = parse_sliteral(c, &label->append); if (label->initrd) break; s = strstr(label->append, "initrd="); if (!s) break; s += 7; len = (int)(strchr(s, ' ') - s); label->initrd = malloc(len + 1); strncpy(label->initrd, s, len); label->initrd[len] = '\0'; break; case T_INITRD: if (!label->initrd) err = parse_sliteral(c, &label->initrd); break; case T_FDT: if (!label->fdt) err = parse_sliteral(c, &label->fdt); break; case T_FDTDIR: if (!label->fdtdir) err = parse_sliteral(c, &label->fdtdir); break; case T_LOCALBOOT: label->localboot = 1; err = parse_integer(c, &label->localboot_val); break; case T_IPAPPEND: err = parse_integer(c, &label->ipappend); break; case T_EOL: break; default: /* * put the token back! we don't want it - it's the end * of a label and whatever token this is, it's * something for the menu level context to handle. */ *c = s; return 1; } if (err < 0) return err; } } /* * This 16 comes from the limit pxelinux imposes on nested includes. * * There is no reason at all we couldn't do more, but some limit helps prevent * infinite (until crash occurs) recursion if a file tries to include itself. */ #define MAX_NEST_LEVEL 16 /* * Entry point for parsing a menu file. nest_level indicates how many times * we've nested in includes. It will be 1 for the top level menu file. * * Returns 1 on success, < 0 on error. */ static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base, |
8cb22a66a cmd: pxe_utils: F... |
1110 |
struct pxe_menu *cfg, int nest_level) |
2373cba3d cmd: Prepare sysb... |
1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 |
{ struct token t; char *s, *b, *label_name; int err; b = p; if (nest_level > MAX_NEST_LEVEL) { printf("Maximum nesting (%d) exceeded ", MAX_NEST_LEVEL); return -EMLINK; } while (1) { s = p; get_token(&p, &t, L_KEYWORD); err = 0; switch (t.type) { case T_MENU: cfg->prompt = 1; err = parse_menu(cmdtp, &p, cfg, |
8cb22a66a cmd: pxe_utils: F... |
1134 1135 |
base + ALIGN(strlen(b) + 1, 4), nest_level); |
2373cba3d cmd: Prepare sysb... |
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 |
break; case T_TIMEOUT: err = parse_integer(&p, &cfg->timeout); break; case T_LABEL: err = parse_label(&p, cfg); break; case T_DEFAULT: case T_ONTIMEOUT: err = parse_sliteral(&p, &label_name); if (label_name) { if (cfg->default_label) free(cfg->default_label); cfg->default_label = label_name; } break; case T_INCLUDE: err = handle_include(cmdtp, &p, |
8cb22a66a cmd: pxe_utils: F... |
1161 1162 |
base + ALIGN(strlen(b), 4), cfg, nest_level + 1); |
2373cba3d cmd: Prepare sysb... |
1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 |
break; case T_PROMPT: eol_or_eof(&p); break; case T_EOL: break; case T_EOF: return 1; default: printf("Ignoring unknown command: %.*s ", |
8cb22a66a cmd: pxe_utils: F... |
1178 |
(int)(p - s), s); |
2373cba3d cmd: Prepare sysb... |
1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 |
eol_or_eof(&p); } if (err < 0) return err; } } /* * Free the memory used by a pxe_menu and its labels. */ void destroy_pxe_menu(struct pxe_menu *cfg) { struct list_head *pos, *n; struct pxe_label *label; if (cfg->title) free(cfg->title); if (cfg->default_label) free(cfg->default_label); list_for_each_safe(pos, n, &cfg->labels) { label = list_entry(pos, struct pxe_label, list); label_destroy(label); } free(cfg); } /* * Entry point for parsing a pxe file. This is only used for the top level * file. * * Returns NULL if there is an error, otherwise, returns a pointer to a * pxe_menu struct populated with the results of parsing the pxe file (and any * files it includes). The resulting pxe_menu struct can be free()'d by using * the destroy_pxe_menu() function. */ struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, unsigned long menucfg) { struct pxe_menu *cfg; char *buf; int r; cfg = malloc(sizeof(struct pxe_menu)); if (!cfg) return NULL; memset(cfg, 0, sizeof(struct pxe_menu)); INIT_LIST_HEAD(&cfg->labels); buf = map_sysmem(menucfg, 0); r = parse_pxefile_top(cmdtp, buf, menucfg, cfg, 1); unmap_sysmem(buf); if (r < 0) { destroy_pxe_menu(cfg); return NULL; } return cfg; } /* * Converts a pxe_menu struct into a menu struct for use with U-Boot's generic * menu code. */ static struct menu *pxe_menu_to_menu(struct pxe_menu *cfg) { struct pxe_label *label; struct list_head *pos; struct menu *m; int err; int i = 1; char *default_num = NULL; /* * Create a menu and add items for all the labels. */ m = menu_create(cfg->title, DIV_ROUND_UP(cfg->timeout, 10), cfg->prompt, label_print, NULL, NULL); if (!m) return NULL; list_for_each(pos, &cfg->labels) { label = list_entry(pos, struct pxe_label, list); sprintf(label->num, "%d", i++); if (menu_item_add(m, label->num, label) != 1) { menu_destroy(m); return NULL; } if (cfg->default_label && (strcmp(label->name, cfg->default_label) == 0)) default_num = label->num; |
2373cba3d cmd: Prepare sysb... |
1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 |
} /* * After we've created items for each label in the menu, set the * menu's default label if one was specified. */ if (default_num) { err = menu_default_set(m, default_num); if (err != 1) { if (err != -ENOENT) { menu_destroy(m); return NULL; } printf("Missing default: %s ", cfg->default_label); } } return m; } /* * Try to boot any labels we have yet to attempt to boot. */ static void boot_unattempted_labels(cmd_tbl_t *cmdtp, struct pxe_menu *cfg) { struct list_head *pos; struct pxe_label *label; list_for_each(pos, &cfg->labels) { label = list_entry(pos, struct pxe_label, list); if (!label->attempted) label_boot(cmdtp, label); } } /* * Boot the system as prescribed by a pxe_menu. * * Use the menu system to either get the user's choice or the default, based * on config or user input. If there is no default or user's choice, * attempted to boot labels in the order they were given in pxe files. * If the default or user's choice fails to boot, attempt to boot other * labels in the order they were given in pxe files. * * If this function returns, there weren't any labels that successfully * booted, or the user interrupted the menu selection via ctrl+c. */ void handle_pxe_menu(cmd_tbl_t *cmdtp, struct pxe_menu *cfg) { void *choice; struct menu *m; int err; #ifdef CONFIG_CMD_BMP /* display BMP if available */ if (cfg->bmp) { |
bb872dd93 image: Rename loa... |
1338 |
if (get_relfile(cmdtp, cfg->bmp, image_load_addr)) { |
e9c669867 cmd: pxe: execute... |
1339 1340 |
if (CONFIG_IS_ENABLED(CMD_CLS)) run_command("cls", 0); |
bb872dd93 image: Rename loa... |
1341 |
bmp_display(image_load_addr, |
2373cba3d cmd: Prepare sysb... |
1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 |
BMP_ALIGN_CENTER, BMP_ALIGN_CENTER); } else { printf("Skipping background bmp %s for failure ", cfg->bmp); } } #endif m = pxe_menu_to_menu(cfg); if (!m) return; err = menu_get_choice(m, &choice); menu_destroy(m); /* * err == 1 means we got a choice back from menu_get_choice. * * err == -ENOENT if the menu was setup to select the default but no * default was set. in that case, we should continue trying to boot * labels that haven't been attempted yet. * * otherwise, the user interrupted or there was some other error and * we give up. */ if (err == 1) { err = label_boot(cmdtp, choice); if (!err) return; } else if (err != -ENOENT) { return; } boot_unattempted_labels(cmdtp, cfg); } |