diff options
Diffstat (limited to 'common/cmd_pxe.c')
| -rw-r--r-- | common/cmd_pxe.c | 1725 |
1 files changed, 0 insertions, 1725 deletions
diff --git a/common/cmd_pxe.c b/common/cmd_pxe.c deleted file mode 100644 index 080b376..0000000 --- a/common/cmd_pxe.c +++ /dev/null @@ -1,1725 +0,0 @@ -/* - * Copyright 2010-2011 Calxeda, Inc. - * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <command.h> -#include <malloc.h> -#include <mapmem.h> -#include <linux/string.h> -#include <linux/ctype.h> -#include <errno.h> -#include <linux/list.h> -#include <fs.h> -#include <asm/io.h> - -#include "menu.h" -#include "cli.h" - -#define MAX_TFTP_PATH_LEN 127 - -const char *pxe_default_paths[] = { -#ifdef CONFIG_SYS_SOC - "default-" CONFIG_SYS_ARCH "-" CONFIG_SYS_SOC, -#endif - "default-" CONFIG_SYS_ARCH, - "default", - NULL -}; - -static bool is_pxe; - -/* - * Like getenv, but prints an error if envvar isn't defined in the - * environment. It always returns what getenv does, so it can be used in - * place of getenv without changing error handling otherwise. - */ -static char *from_env(const char *envvar) -{ - char *ret; - - ret = getenv(envvar); - - if (!ret) - printf("missing environment variable: %s\n", envvar); - - return ret; -} - -#ifdef CONFIG_CMD_NET -/* - * 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. - */ -static int format_mac_pxe(char *outbuf, size_t outbuf_len) -{ - uchar ethaddr[6]; - - if (outbuf_len < 21) { - printf("outbuf is too small (%zd < 21)\n", outbuf_len); - - return -EINVAL; - } - - if (!eth_getenv_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; -} -#endif - -/* - * 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, '/'); - - if (last_slash == NULL) - goto ret; - - path_len = (last_slash - bootfile) + 1; - - if (bootfile_path_size < path_len) { - printf("bootfile_path too small. (%zd < %zd)\n", - bootfile_path_size, path_len); - - return -1; - } - - strncpy(bootfile_path, bootfile, path_len); - - ret: - bootfile_path[path_len] = '\0'; - - return 1; -} - -static int (*do_getfile)(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr); - -#ifdef CONFIG_CMD_NET -static int do_get_tftp(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) -{ - char *tftp_argv[] = {"tftp", NULL, NULL, NULL}; - - tftp_argv[1] = file_addr; - tftp_argv[2] = (void *)file_path; - - if (do_tftpb(cmdtp, 0, 3, tftp_argv)) - return -ENOENT; - - return 1; -} -#endif - -static char *fs_argv[5]; - -static int do_get_ext2(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) -{ -#ifdef CONFIG_CMD_EXT2 - fs_argv[0] = "ext2load"; - fs_argv[3] = file_addr; - fs_argv[4] = (void *)file_path; - - if (!do_ext2load(cmdtp, 0, 5, fs_argv)) - return 1; -#endif - return -ENOENT; -} - -static int do_get_fat(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) -{ -#ifdef CONFIG_CMD_FAT - fs_argv[0] = "fatload"; - fs_argv[3] = file_addr; - fs_argv[4] = (void *)file_path; - - if (!do_fat_fsload(cmdtp, 0, 5, fs_argv)) - return 1; -#endif - return -ENOENT; -} - -static int do_get_any(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) -{ -#ifdef CONFIG_CMD_FS_GENERIC - fs_argv[0] = "load"; - fs_argv[3] = file_addr; - fs_argv[4] = (void *)file_path; - - if (!do_load(cmdtp, 0, 5, fs_argv, FS_TYPE_ANY)) - return 1; -#endif - return -ENOENT; -} - -/* - * 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, - unsigned long file_addr) -{ - size_t path_len; - char relfile[MAX_TFTP_PATH_LEN+1]; - 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) { - printf("Base path too long (%s%s)\n", - relfile, - file_path); - - return -ENAMETOOLONG; - } - - strcat(relfile, file_path); - - printf("Retrieving file: %s\n", 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. - */ -static int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path, - unsigned long file_addr) -{ - 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; -} - -#ifdef CONFIG_CMD_NET - -#define PXELINUX_DIR "pxelinux.cfg/" - -/* - * 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. - */ -static int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file, - unsigned long pxefile_addr_r) -{ - size_t base_len = strlen(PXELINUX_DIR); - char path[MAX_TFTP_PATH_LEN+1]; - - if (base_len + strlen(file) > MAX_TFTP_PATH_LEN) { - printf("path (%s%s) too long, skipping\n", - PXELINUX_DIR, file); - return -ENAMETOOLONG; - } - - sprintf(path, PXELINUX_DIR "%s", file); - - return get_pxe_file(cmdtp, path, pxefile_addr_r); -} - -/* - * Looks for a pxe file with a name based on the pxeuuid environment variable. - * - * Returns 1 on success or < 0 on error. - */ -static int pxe_uuid_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r) -{ - char *uuid_str; - - uuid_str = from_env("pxeuuid"); - - if (!uuid_str) - return -ENOENT; - - return get_pxelinux_path(cmdtp, uuid_str, pxefile_addr_r); -} - -/* - * Looks for a pxe file with a name based on the 'ethaddr' environment - * variable. - * - * Returns 1 on success or < 0 on error. - */ -static int pxe_mac_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r) -{ - char mac_str[21]; - int err; - - err = format_mac_pxe(mac_str, sizeof(mac_str)); - - if (err < 0) - return err; - - return get_pxelinux_path(cmdtp, mac_str, pxefile_addr_r); -} - -/* - * Looks for pxe files with names based on our IP address. See pxelinux - * documentation for details on what these file names look like. We match - * that exactly. - * - * Returns 1 on success or < 0 on error. - */ -static int pxe_ipaddr_paths(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r) -{ - char ip_addr[9]; - int mask_pos, err; - - sprintf(ip_addr, "%08X", ntohl(net_ip.s_addr)); - - for (mask_pos = 7; mask_pos >= 0; mask_pos--) { - err = get_pxelinux_path(cmdtp, ip_addr, pxefile_addr_r); - - if (err > 0) - return err; - - ip_addr[mask_pos] = '\0'; - } - - return -ENOENT; -} - -/* - * Entry point for the 'pxe get' command. - * This Follows pxelinux's rules to download a config file from a tftp server. - * The file is stored at the location given by the pxefile_addr_r environment - * variable, which must be set. - * - * UUID comes from pxeuuid env variable, if defined - * MAC addr comes from ethaddr env variable, if defined - * IP - * - * see http://syslinux.zytor.com/wiki/index.php/PXELINUX - * - * Returns 0 on success or 1 on error. - */ -static int -do_pxe_get(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) -{ - char *pxefile_addr_str; - unsigned long pxefile_addr_r; - int err, i = 0; - - do_getfile = do_get_tftp; - - if (argc != 1) - return CMD_RET_USAGE; - - pxefile_addr_str = from_env("pxefile_addr_r"); - - if (!pxefile_addr_str) - return 1; - - err = strict_strtoul(pxefile_addr_str, 16, - (unsigned long *)&pxefile_addr_r); - if (err < 0) - return 1; - - /* - * Keep trying paths until we successfully get a file we're looking - * for. - */ - if (pxe_uuid_path(cmdtp, pxefile_addr_r) > 0 || - pxe_mac_path(cmdtp, pxefile_addr_r) > 0 || - pxe_ipaddr_paths(cmdtp, pxefile_addr_r) > 0) { - printf("Config file found\n"); - - return 0; - } - - while (pxe_default_paths[i]) { - if (get_pxelinux_path(cmdtp, pxe_default_paths[i], - pxefile_addr_r) > 0) { - printf("Config file found\n"); - return 0; - } - i++; - } - - printf("Config file not found\n"); - - return 1; -} -#endif - -/* - * 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. - */ -static int get_relfile_envaddr(cmd_tbl_t *cmdtp, const char *file_path, const char *envaddr_name) -{ - 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); -} - -/* - * A note on the pxe file parser. - * - * We're parsing files that use syslinux grammar, which has a few quirks. - * String literals must be recognized based on context - there is no - * quoting or escaping support. There's also nothing to explicitly indicate - * when a label section completes. We deal with that by ending a label - * section whenever we see a line that doesn't include. - * - * As with the syslinux family, this same file format could be reused in the - * future for non pxe purposes. The only action it takes during parsing that - * would throw this off is handling of include files. It assumes we're using - * pxe, and does a tftp download of a file listed as an include file in the - * middle of the parsing operation. That could be handled by refactoring it to - * take a 'include file getter' function. - */ - -/* - * Describes a single label given in a pxe file. - * - * Create these with the 'label_create' function given below. - * - * name - the name of the menu as given on the 'menu label' line. - * kernel - the path to the kernel file to use for this label. - * append - kernel command line to use when booting this label - * initrd - path to the initrd to use for this label. - * attempted - 0 if we haven't tried to boot this label, 1 if we have. - * localboot - 1 if this label specified 'localboot', 0 otherwise. - * list - lets these form a list, which a pxe_menu struct will hold. - */ -struct pxe_label { - char num[4]; - char *name; - char *menu; - char *kernel; - char *append; - char *initrd; - char *fdt; - char *fdtdir; - int ipappend; - int attempted; - int localboot; - int localboot_val; - struct list_head list; -}; - -/* - * Describes a pxe menu as given via pxe files. - * - * title - the name of the menu as given by a 'menu title' line. - * default_label - the name of the default label, if any. - * timeout - time in tenths of a second to wait for a user key-press before - * booting the default label. - * prompt - if 0, don't prompt for a choice unless the timeout period is - * interrupted. If 1, always prompt for a choice regardless of - * timeout. - * labels - a list of labels defined for the menu. - */ -struct pxe_menu { - char *title; - char *default_label; - int timeout; - int prompt; - struct list_head labels; -}; - -/* - * 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->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\n", 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); - setenv("bootargs", bootargs); - } - - debug("running: %s\n", 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[22]; - char mac_str[29] = ""; - char ip_str[68] = ""; - int bootm_argc = 3; - 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; - } - - if (label->kernel == NULL) { - printf("No kernel given, skipping %s\n", - label->name); - return 1; - } - - if (label->initrd) { - if (get_relfile_envaddr(cmdtp, label->initrd, "ramdisk_addr_r") < 0) { - printf("Skipping %s for failure retrieving initrd\n", - label->name); - return 1; - } - - bootm_argv[2] = initrd_str; - strcpy(bootm_argv[2], getenv("ramdisk_addr_r")); - strcat(bootm_argv[2], ":"); - strcat(bootm_argv[2], getenv("filesize")); - } else { - bootm_argv[2] = "-"; - } - - if (get_relfile_envaddr(cmdtp, label->kernel, "kernel_addr_r") < 0) { - printf("Skipping %s for failure retrieving kernel\n", - label->name); - return 1; - } - - if (label->ipappend & 0x1) { - sprintf(ip_str, " ip=%s:%s:%s:%s", - getenv("ipaddr"), getenv("serverip"), - getenv("gatewayip"), getenv("netmask")); - } - -#ifdef CONFIG_CMD_NET - if (label->ipappend & 0x2) { - int err; - 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\n", - strlen(label->append ?: ""), - strlen(ip_str), strlen(mac_str), - sizeof(bootargs)); - return 1; - } - - if (label->append) - strcpy(bootargs, label->append); - strcat(bootargs, ip_str); - strcat(bootargs, mac_str); - - cli_simple_process_macros(bootargs, finalbootargs); - setenv("bootargs", finalbootargs); - printf("append: %s\n", finalbootargs); - } - - bootm_argv[1] = getenv("kernel_addr_r"); - - /* - * 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] = getenv("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 = getenv("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 = getenv("soc"); - f2 = "-"; - f3 = getenv("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)\n"); - return 1; - } - - snprintf(fdtfilefree, len, "%s%s%s%s%s%s", - label->fdtdir, slash, f1, f2, f3, f4); - fdtfile = fdtfilefree; - } - - if (fdtfile) { - int err = get_relfile_envaddr(cmdtp, fdtfile, "fdt_addr_r"); - free(fdtfilefree); - if (err < 0) { - printf("Skipping %s for failure retrieving fdt\n", - label->name); - return 1; - } - } else { - bootm_argv[3] = NULL; - } - } - - if (!bootm_argv[3]) - bootm_argv[3] = getenv("fdt_addr"); - - if (bootm_argv[3]) - 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); - 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_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,}, - {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. - */ - b = e = *p; - - 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 != '\n') - c++; - } - - if (*c == '\n') { - t->type = T_EOL; - c++; - } else if (*c == '\0') { - t->type = T_EOF; - c++; - } else if (state == L_SLITERAL) { - get_string(&c, t, '\n', 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 != '\n') - (*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\n", (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\n", (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, - struct pxe_menu *cfg, int nest_level); - -/* - * 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, - struct pxe_menu *cfg, int nest_level) -{ - char *include_path; - char *s = *c; - int err; - char *buf; - int ret; - - err = parse_sliteral(c, &include_path); - - if (err < 0) { - printf("Expected include path: %.*s\n", - (int)(*c - s), s); - return err; - } - - err = get_pxe_file(cmdtp, include_path, base); - - if (err < 0) { - printf("Couldn't retrieve %s\n", 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, - unsigned long base, int nest_level) -{ - 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: - err = handle_include(cmdtp, c, base, cfg, - nest_level + 1); - break; - - default: - printf("Ignoring malformed menu command: %.*s\n", - (int)(*c - s), s); - } - - 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, - struct pxe_label *label) -{ - 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\n", - (int)(*c - s), s); - } - - eol_or_eof(c); - - return 0; -} - -/* - * 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\n", (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_sliteral(c, &label->kernel); - 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, - struct pxe_menu *cfg, int nest_level) -{ - struct token t; - char *s, *b, *label_name; - int err; - - b = p; - - if (nest_level > MAX_NEST_LEVEL) { - printf("Maximum nesting (%d) exceeded\n", 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, - base + ALIGN(strlen(b) + 1, 4), - nest_level); - 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, - base + ALIGN(strlen(b), 4), cfg, - nest_level + 1); - break; - - case T_PROMPT: - eol_or_eof(&p); - break; - - case T_EOL: - break; - - case T_EOF: - return 1; - - default: - printf("Ignoring unknown command: %.*s\n", - (int)(p - s), s); - eol_or_eof(&p); - } - - if (err < 0) - return err; - } -} - -/* - * Free the memory used by a pxe_menu and its labels. - */ -static 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. - */ -static 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, cfg->timeout, 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; - - } - - /* - * 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\n", 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. - */ -static void handle_pxe_menu(cmd_tbl_t *cmdtp, struct pxe_menu *cfg) -{ - void *choice; - struct menu *m; - int err; - - 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); -} - -#ifdef CONFIG_CMD_NET -/* - * Boots a system using a pxe file - * - * Returns 0 on success, 1 on error. - */ -static int -do_pxe_boot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) -{ - unsigned long pxefile_addr_r; - struct pxe_menu *cfg; - char *pxefile_addr_str; - - do_getfile = do_get_tftp; - - if (argc == 1) { - pxefile_addr_str = from_env("pxefile_addr_r"); - if (!pxefile_addr_str) - return 1; - - } else if (argc == 2) { - pxefile_addr_str = argv[1]; - } else { - return CMD_RET_USAGE; - } - - if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) { - printf("Invalid pxefile address: %s\n", pxefile_addr_str); - return 1; - } - - cfg = parse_pxefile(cmdtp, pxefile_addr_r); - - if (cfg == NULL) { - printf("Error parsing config file\n"); - return 1; - } - - handle_pxe_menu(cmdtp, cfg); - - destroy_pxe_menu(cfg); - - copy_filename(net_boot_file_name, "", sizeof(net_boot_file_name)); - - return 0; -} - -static cmd_tbl_t cmd_pxe_sub[] = { - U_BOOT_CMD_MKENT(get, 1, 1, do_pxe_get, "", ""), - U_BOOT_CMD_MKENT(boot, 2, 1, do_pxe_boot, "", "") -}; - -static int do_pxe(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) -{ - cmd_tbl_t *cp; - - if (argc < 2) - return CMD_RET_USAGE; - - is_pxe = true; - - /* drop initial "pxe" arg */ - argc--; - argv++; - - cp = find_cmd_tbl(argv[0], cmd_pxe_sub, ARRAY_SIZE(cmd_pxe_sub)); - - if (cp) - return cp->cmd(cmdtp, flag, argc, argv); - - return CMD_RET_USAGE; -} - -U_BOOT_CMD( - pxe, 3, 1, do_pxe, - "commands to get and boot from pxe files", - "get - try to retrieve a pxe file using tftp\npxe " - "boot [pxefile_addr_r] - boot from the pxe file at pxefile_addr_r\n" -); -#endif - -/* - * Boots a system using a local disk syslinux/extlinux file - * - * Returns 0 on success, 1 on error. - */ -static int do_sysboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) -{ - unsigned long pxefile_addr_r; - struct pxe_menu *cfg; - char *pxefile_addr_str; - char *filename; - int prompt = 0; - - is_pxe = false; - - if (argc > 1 && strstr(argv[1], "-p")) { - prompt = 1; - argc--; - argv++; - } - - if (argc < 4) - return cmd_usage(cmdtp); - - if (argc < 5) { - pxefile_addr_str = from_env("pxefile_addr_r"); - if (!pxefile_addr_str) - return 1; - } else { - pxefile_addr_str = argv[4]; - } - - if (argc < 6) - filename = getenv("bootfile"); - else { - filename = argv[5]; - setenv("bootfile", filename); - } - - if (strstr(argv[3], "ext2")) - do_getfile = do_get_ext2; - else if (strstr(argv[3], "fat")) - do_getfile = do_get_fat; - else if (strstr(argv[3], "any")) - do_getfile = do_get_any; - else { - printf("Invalid filesystem: %s\n", argv[3]); - return 1; - } - fs_argv[1] = argv[1]; - fs_argv[2] = argv[2]; - - if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) { - printf("Invalid pxefile address: %s\n", pxefile_addr_str); - return 1; - } - - if (get_pxe_file(cmdtp, filename, pxefile_addr_r) < 0) { - printf("Error reading config file\n"); - return 1; - } - - cfg = parse_pxefile(cmdtp, pxefile_addr_r); - - if (cfg == NULL) { - printf("Error parsing config file\n"); - return 1; - } - - if (prompt) - cfg->prompt = 1; - - handle_pxe_menu(cmdtp, cfg); - - destroy_pxe_menu(cfg); - - return 0; -} - -U_BOOT_CMD( - sysboot, 7, 1, do_sysboot, - "command to get and boot from syslinux files", - "[-p] <interface> <dev[:part]> <ext2|fat|any> [addr] [filename]\n" - " - load and parse syslinux menu file 'filename' from ext2, fat\n" - " or any filesystem on 'dev' on 'interface' to address 'addr'" -); |