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common/cmd_pxe.c
35.9 KB
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/* * Copyright 2010-2011 Calxeda, Inc. * |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> #include <command.h> #include <malloc.h> #include <linux/string.h> #include <linux/ctype.h> #include <errno.h> #include <linux/list.h> |
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#include <fs.h> |
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#include "menu.h" #define MAX_TFTP_PATH_LEN 127 |
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const char *pxe_default_paths[] = { |
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#ifdef CONFIG_SYS_SOC |
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"default-" CONFIG_SYS_ARCH "-" CONFIG_SYS_SOC, |
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#endif |
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"default-" CONFIG_SYS_ARCH, "default", NULL }; |
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static bool is_pxe; |
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/* * 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. */ |
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static char *from_env(const char *envvar) |
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{ char *ret; ret = getenv(envvar); if (!ret) printf("missing environment variable: %s ", envvar); return ret; } /* * 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) { |
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uchar ethaddr[6]; |
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if (outbuf_len < 21) { |
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printf("outbuf is too small (%zd < 21) ", outbuf_len); |
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return -EINVAL; } |
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if (!eth_getenv_enetaddr_by_index("eth", eth_get_dev_index(), ethaddr)) return -ENOENT; |
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sprintf(outbuf, "01-%02x-%02x-%02x-%02x-%02x-%02x", ethaddr[0], ethaddr[1], ethaddr[2], ethaddr[3], ethaddr[4], ethaddr[5]); |
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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". */ |
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static int get_bootfile_path(const char *file_path, char *bootfile_path, size_t bootfile_path_size) |
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{ char *bootfile, *last_slash; |
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size_t path_len = 0; |
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/* Only syslinux allows absolute paths */ if (file_path[0] == '/' && !is_pxe) |
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goto ret; |
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bootfile = from_env("bootfile"); |
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if (!bootfile) goto ret; |
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last_slash = strrchr(bootfile, '/'); |
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if (last_slash == NULL) goto ret; |
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path_len = (last_slash - bootfile) + 1; if (bootfile_path_size < path_len) { |
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printf("bootfile_path too small. (%zd < %zd) ", |
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bootfile_path_size, path_len); return -1; } strncpy(bootfile_path, bootfile, path_len); |
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ret: |
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bootfile_path[path_len] = '\0'; return 1; } |
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static int (*do_getfile)(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr); |
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|
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static int do_get_tftp(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) |
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{ char *tftp_argv[] = {"tftp", NULL, NULL, NULL}; tftp_argv[1] = file_addr; |
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tftp_argv[2] = (void *)file_path; |
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|
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if (do_tftpb(cmdtp, 0, 3, tftp_argv)) |
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return -ENOENT; return 1; } static char *fs_argv[5]; |
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static int do_get_ext2(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) |
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{ #ifdef CONFIG_CMD_EXT2 fs_argv[0] = "ext2load"; fs_argv[3] = file_addr; |
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fs_argv[4] = (void *)file_path; |
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|
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if (!do_ext2load(cmdtp, 0, 5, fs_argv)) |
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return 1; #endif return -ENOENT; } |
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static int do_get_fat(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) |
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{ #ifdef CONFIG_CMD_FAT fs_argv[0] = "fatload"; fs_argv[3] = file_addr; |
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fs_argv[4] = (void *)file_path; |
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|
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if (!do_fat_fsload(cmdtp, 0, 5, fs_argv)) |
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return 1; #endif return -ENOENT; } |
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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; } |
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/* * 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. */ |
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static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path, void *file_addr) |
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{ size_t path_len; char relfile[MAX_TFTP_PATH_LEN+1]; char addr_buf[10]; |
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int err; |
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err = get_bootfile_path(file_path, relfile, sizeof(relfile)); |
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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) ", relfile, file_path); return -ENAMETOOLONG; } strcat(relfile, file_path); printf("Retrieving file: %s ", relfile); sprintf(addr_buf, "%p", file_addr); |
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return do_getfile(cmdtp, relfile, addr_buf); |
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} /* * 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. */ |
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static int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path, void *file_addr) |
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{ unsigned long config_file_size; char *tftp_filesize; int err; |
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err = get_relfile(cmdtp, file_path, file_addr); |
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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; *(char *)(file_addr + config_file_size) = '\0'; return 1; } #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. */ |
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static int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file, void *pxefile_addr_r) |
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{ 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 ", PXELINUX_DIR, file); return -ENAMETOOLONG; } sprintf(path, PXELINUX_DIR "%s", file); |
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return get_pxe_file(cmdtp, path, pxefile_addr_r); |
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} /* * Looks for a pxe file with a name based on the pxeuuid environment variable. * * Returns 1 on success or < 0 on error. */ |
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static int pxe_uuid_path(cmd_tbl_t *cmdtp, void *pxefile_addr_r) |
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{ char *uuid_str; uuid_str = from_env("pxeuuid"); if (!uuid_str) return -ENOENT; |
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return get_pxelinux_path(cmdtp, uuid_str, pxefile_addr_r); |
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} /* * Looks for a pxe file with a name based on the 'ethaddr' environment * variable. * * Returns 1 on success or < 0 on error. */ |
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static int pxe_mac_path(cmd_tbl_t *cmdtp, void *pxefile_addr_r) |
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{ char mac_str[21]; int err; err = format_mac_pxe(mac_str, sizeof(mac_str)); if (err < 0) return err; |
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return get_pxelinux_path(cmdtp, mac_str, pxefile_addr_r); |
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} /* * 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. */ |
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static int pxe_ipaddr_paths(cmd_tbl_t *cmdtp, void *pxefile_addr_r) |
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{ char ip_addr[9]; int mask_pos, err; sprintf(ip_addr, "%08X", ntohl(NetOurIP)); for (mask_pos = 7; mask_pos >= 0; mask_pos--) { |
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err = get_pxelinux_path(cmdtp, ip_addr, pxefile_addr_r); |
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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; |
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unsigned long pxefile_addr_r; |
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int err, i = 0; |
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do_getfile = do_get_tftp; |
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if (argc != 1) |
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return CMD_RET_USAGE; |
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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. */ |
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if (pxe_uuid_path(cmdtp, (void *)pxefile_addr_r) > 0 || pxe_mac_path(cmdtp, (void *)pxefile_addr_r) > 0 || pxe_ipaddr_paths(cmdtp, (void *)pxefile_addr_r) > 0) { |
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printf("Config file found "); return 0; } |
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while (pxe_default_paths[i]) { |
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if (get_pxelinux_path(cmdtp, pxe_default_paths[i], |
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(void *)pxefile_addr_r) > 0) { printf("Config file found "); return 0; } i++; } |
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printf("Config file not found "); return 1; } /* * 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. */ |
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static int get_relfile_envaddr(cmd_tbl_t *cmdtp, const char *file_path, const char *envaddr_name) |
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{ |
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unsigned long file_addr; |
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char *envaddr; envaddr = from_env(envaddr_name); if (!envaddr) return -ENOENT; |
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if (strict_strtoul(envaddr, 16, &file_addr) < 0) |
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return -EINVAL; |
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return get_relfile(cmdtp, file_path, (void *)file_addr); |
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} /* * 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 { |
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char num[4]; |
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char *name; |
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char *menu; |
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char *kernel; char *append; char *initrd; |
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char *fdt; |
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char *fdtdir; |
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int ipappend; |
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int attempted; int localboot; |
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int localboot_val; |
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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); |
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if (label->fdt) free(label->fdt); |
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if (label->fdtdir) free(label->fdtdir); |
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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; |
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const char *c = label->menu ? label->menu : label->name; |
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printf("%s:\t%s ", label->num, c); |
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} /* * 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) { |
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char *localcmd; |
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localcmd = from_env("localcmd"); if (!localcmd) return -ENOENT; |
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if (label->append) setenv("bootargs", label->append); |
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debug("running: %s ", localcmd); |
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return run_command_list(localcmd, strlen(localcmd), 0); |
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} /* * 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. */ |
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static int label_boot(cmd_tbl_t *cmdtp, struct pxe_label *label) |
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{ char *bootm_argv[] = { "bootm", NULL, NULL, NULL, NULL }; |
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char initrd_str[22]; |
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char mac_str[29] = ""; char ip_str[68] = ""; char *bootargs; |
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int bootm_argc = 3; |
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int len = 0; |
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label_print(label); label->attempted = 1; if (label->localboot) { |
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if (label->localboot_val >= 0) label_localboot(label); return 0; |
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} if (label->kernel == NULL) { printf("No kernel given, skipping %s ", label->name); |
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return 1; |
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} if (label->initrd) { |
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if (get_relfile_envaddr(cmdtp, label->initrd, "ramdisk_addr_r") < 0) { |
06283a640 Add pxe command |
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printf("Skipping %s for failure retrieving initrd ", label->name); |
500f304b6 pxe: fix handling... |
610 |
return 1; |
06283a640 Add pxe command |
611 |
} |
e6b6ccf20 pxe: try bootz if... |
612 613 614 615 |
bootm_argv[2] = initrd_str; strcpy(bootm_argv[2], getenv("ramdisk_addr_r")); strcat(bootm_argv[2], ":"); strcat(bootm_argv[2], getenv("filesize")); |
06283a640 Add pxe command |
616 617 618 |
} else { bootm_argv[2] = "-"; } |
0e3f3f8a3 Prevent null poin... |
619 |
if (get_relfile_envaddr(cmdtp, label->kernel, "kernel_addr_r") < 0) { |
06283a640 Add pxe command |
620 621 622 |
printf("Skipping %s for failure retrieving kernel ", label->name); |
500f304b6 pxe: fix handling... |
623 |
return 1; |
06283a640 Add pxe command |
624 |
} |
98f646764 pxe: add ipappend... |
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 |
if (label->ipappend & 0x1) { sprintf(ip_str, " ip=%s:%s:%s:%s", getenv("ipaddr"), getenv("serverip"), getenv("gatewayip"), getenv("netmask")); len += strlen(ip_str); } 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'; len += strlen(mac_str); } if (label->append) len += strlen(label->append); if (len) { bootargs = malloc(len + 1); if (!bootargs) return 1; bootargs[0] = '\0'; if (label->append) strcpy(bootargs, label->append); strcat(bootargs, ip_str); strcat(bootargs, mac_str); setenv("bootargs", bootargs); printf("append: %s ", bootargs); free(bootargs); |
32d2ffe73 pxe: simplify men... |
659 |
} |
06283a640 Add pxe command |
660 661 662 663 |
bootm_argv[1] = getenv("kernel_addr_r"); /* |
a655938a9 PXE: FDT: Add sup... |
664 665 666 667 668 669 670 671 672 673 674 |
* 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. |
06283a640 Add pxe command |
675 |
*/ |
a655938a9 PXE: FDT: Add sup... |
676 677 678 |
bootm_argv[3] = getenv("fdt_addr_r"); /* if fdt label is defined then get fdt from server */ |
c61d94d86 pxe: implement fd... |
679 680 681 682 683 684 685 |
if (bootm_argv[3]) { char *fdtfile = NULL; char *fdtfilefree = NULL; if (label->fdt) { fdtfile = label->fdt; } else if (label->fdtdir) { |
e22361af0 pxe: prepend fdtd... |
686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 |
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"; |
c61d94d86 pxe: implement fd... |
705 |
} |
e22361af0 pxe: prepend fdtd... |
706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 |
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) "); return 1; } snprintf(fdtfilefree, len, "%s%s%s%s%s%s", label->fdtdir, slash, f1, f2, f3, f4); fdtfile = fdtfilefree; |
a655938a9 PXE: FDT: Add sup... |
728 |
} |
c61d94d86 pxe: implement fd... |
729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 |
if (fdtfile) { int err = get_relfile_envaddr(cmdtp, fdtfile, "fdt_addr_r"); free(fdtfilefree); if (err < 0) { printf("Skipping %s for failure retrieving fdt ", label->name); return 1; } } else { bootm_argv[3] = NULL; } } if (!bootm_argv[3]) |
a655938a9 PXE: FDT: Add sup... |
745 |
bootm_argv[3] = getenv("fdt_addr"); |
06283a640 Add pxe command |
746 747 748 |
if (bootm_argv[3]) bootm_argc = 4; |
d7884e047 cmd_pxe.c: Pass a... |
749 |
do_bootm(cmdtp, 0, bootm_argc, bootm_argv); |
e6b6ccf20 pxe: try bootz if... |
750 751 752 |
#ifdef CONFIG_CMD_BOOTZ /* Try booting a zImage if do_bootm returns */ |
d7884e047 cmd_pxe.c: Pass a... |
753 |
do_bootz(cmdtp, 0, bootm_argc, bootm_argv); |
e6b6ccf20 pxe: try bootz if... |
754 |
#endif |
500f304b6 pxe: fix handling... |
755 |
return 1; |
06283a640 Add pxe command |
756 757 758 759 760 761 762 763 764 765 766 767 768 769 |
} /* * 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, |
beb9f6c67 pxe: support linu... |
770 |
T_LINUX, |
06283a640 Add pxe command |
771 772 773 774 775 776 |
T_APPEND, T_INITRD, T_LOCALBOOT, T_DEFAULT, T_PROMPT, T_INCLUDE, |
a655938a9 PXE: FDT: Add sup... |
777 |
T_FDT, |
c61d94d86 pxe: implement fd... |
778 |
T_FDTDIR, |
8577fec97 pxe: add support ... |
779 |
T_ONTIMEOUT, |
98f646764 pxe: add ipappend... |
780 |
T_IPAPPEND, |
06283a640 Add pxe command |
781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 |
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}, |
beb9f6c67 pxe: support linu... |
803 |
{"linux", T_LINUX}, |
06283a640 Add pxe command |
804 805 806 807 |
{"localboot", T_LOCALBOOT}, {"append", T_APPEND}, {"initrd", T_INITRD}, {"include", T_INCLUDE}, |
f43c401b7 pxe: support "dev... |
808 |
{"devicetree", T_FDT}, |
a655938a9 PXE: FDT: Add sup... |
809 |
{"fdt", T_FDT}, |
c61d94d86 pxe: implement fd... |
810 811 |
{"devicetreedir", T_FDTDIR}, {"fdtdir", T_FDTDIR}, |
8577fec97 pxe: add support ... |
812 |
{"ontimeout", T_ONTIMEOUT,}, |
98f646764 pxe: add ipappend... |
813 |
{"ipappend", T_IPAPPEND,}, |
06283a640 Add pxe command |
814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 |
{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 != ' ') 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; |
06283a640 Add pxe command |
1009 1010 1011 1012 1013 1014 1015 1016 |
get_token(c, &t, L_SLITERAL); if (t.type != T_STRING) { printf("Expected string: %.*s ", (int)(*c - s), s); return -EINVAL; } |
500f304b6 pxe: fix handling... |
1017 |
*dst = simple_strtol(t.val, NULL, 10); |
06283a640 Add pxe command |
1018 1019 1020 1021 1022 |
free(t.val); return 1; } |
0e3f3f8a3 Prevent null poin... |
1023 |
static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, struct pxe_menu *cfg, int nest_level); |
06283a640 Add pxe command |
1024 1025 1026 1027 1028 1029 1030 1031 1032 |
/* * 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. */ |
0e3f3f8a3 Prevent null poin... |
1033 |
static int handle_include(cmd_tbl_t *cmdtp, char **c, char *base, |
06283a640 Add pxe command |
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 |
struct pxe_menu *cfg, int nest_level) { char *include_path; char *s = *c; int err; err = parse_sliteral(c, &include_path); if (err < 0) { printf("Expected include path: %.*s ", (int)(*c - s), s); return err; } |
0e3f3f8a3 Prevent null poin... |
1048 |
err = get_pxe_file(cmdtp, include_path, base); |
06283a640 Add pxe command |
1049 1050 1051 1052 1053 1054 |
if (err < 0) { printf("Couldn't retrieve %s ", include_path); return err; } |
0e3f3f8a3 Prevent null poin... |
1055 |
return parse_pxefile_top(cmdtp, base, cfg, nest_level); |
06283a640 Add pxe command |
1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 |
} /* * Parse lines that begin with 'menu'. * * b and nest are provided to handle the 'menu include' case. * * b should be the address where the file currently being parsed is stored. * * 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. */ |
0e3f3f8a3 Prevent null poin... |
1068 |
static int parse_menu(cmd_tbl_t *cmdtp, char **c, struct pxe_menu *cfg, char *b, int nest_level) |
06283a640 Add pxe command |
1069 1070 1071 |
{ struct token t; char *s = *c; |
43d4a5e68 common/cmd_pxe.c:... |
1072 |
int err = 0; |
06283a640 Add pxe command |
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 |
get_token(c, &t, L_KEYWORD); switch (t.type) { case T_TITLE: err = parse_sliteral(c, &cfg->title); break; case T_INCLUDE: |
0e3f3f8a3 Prevent null poin... |
1083 |
err = handle_include(cmdtp, c, b + strlen(b) + 1, cfg, |
06283a640 Add pxe command |
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 1110 1111 1112 1113 1114 1115 |
nest_level + 1); break; default: printf("Ignoring malformed menu command: %.*s ", (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: |
8577fec97 pxe: add support ... |
1116 1117 |
if (!cfg->default_label) cfg->default_label = strdup(label->name); |
06283a640 Add pxe command |
1118 1119 1120 1121 1122 |
if (!cfg->default_label) return -ENOMEM; break; |
7815c4e89 pxe: add support ... |
1123 1124 1125 |
case T_LABEL: parse_sliteral(c, &label->menu); break; |
06283a640 Add pxe command |
1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 |
default: printf("Ignoring malformed menu command: %.*s ", (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; |
34bd23e42 pxe: parse initrd... |
1148 |
int len; |
06283a640 Add pxe command |
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 |
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: |
beb9f6c67 pxe: support linu... |
1178 |
case T_LINUX: |
06283a640 Add pxe command |
1179 1180 1181 1182 1183 |
err = parse_sliteral(c, &label->kernel); break; case T_APPEND: err = parse_sliteral(c, &label->append); |
34bd23e42 pxe: parse initrd... |
1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 |
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'; |
06283a640 Add pxe command |
1194 1195 1196 |
break; case T_INITRD: |
34bd23e42 pxe: parse initrd... |
1197 1198 |
if (!label->initrd) err = parse_sliteral(c, &label->initrd); |
06283a640 Add pxe command |
1199 |
break; |
a655938a9 PXE: FDT: Add sup... |
1200 1201 1202 1203 |
case T_FDT: if (!label->fdt) err = parse_sliteral(c, &label->fdt); break; |
c61d94d86 pxe: implement fd... |
1204 1205 1206 1207 |
case T_FDTDIR: if (!label->fdtdir) err = parse_sliteral(c, &label->fdtdir); break; |
06283a640 Add pxe command |
1208 |
case T_LOCALBOOT: |
500f304b6 pxe: fix handling... |
1209 1210 |
label->localboot = 1; err = parse_integer(c, &label->localboot_val); |
06283a640 Add pxe command |
1211 |
break; |
98f646764 pxe: add ipappend... |
1212 1213 1214 |
case T_IPAPPEND: err = parse_integer(c, &label->ipappend); break; |
06283a640 Add pxe command |
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 |
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. */ |
0e3f3f8a3 Prevent null poin... |
1247 |
static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, struct pxe_menu *cfg, int nest_level) |
06283a640 Add pxe command |
1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 |
{ 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: |
e82eeb570 pxe: always displ... |
1269 |
cfg->prompt = 1; |
0e3f3f8a3 Prevent null poin... |
1270 |
err = parse_menu(cmdtp, &p, cfg, b, nest_level); |
06283a640 Add pxe command |
1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 |
break; case T_TIMEOUT: err = parse_integer(&p, &cfg->timeout); break; case T_LABEL: err = parse_label(&p, cfg); break; case T_DEFAULT: |
8577fec97 pxe: add support ... |
1282 |
case T_ONTIMEOUT: |
06283a640 Add pxe command |
1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 |
err = parse_sliteral(&p, &label_name); if (label_name) { if (cfg->default_label) free(cfg->default_label); cfg->default_label = label_name; } break; |
1e0852269 pxe: support incl... |
1293 |
case T_INCLUDE: |
0e3f3f8a3 Prevent null poin... |
1294 |
err = handle_include(cmdtp, &p, b + ALIGN(strlen(b), 4), cfg, |
1e0852269 pxe: support incl... |
1295 1296 |
nest_level + 1); break; |
06283a640 Add pxe command |
1297 |
case T_PROMPT: |
e82eeb570 pxe: always displ... |
1298 |
eol_or_eof(&p); |
06283a640 Add pxe command |
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 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 |
break; case T_EOL: break; case T_EOF: return 1; default: printf("Ignoring unknown command: %.*s ", (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. */ |
0e3f3f8a3 Prevent null poin... |
1351 |
static struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, char *menucfg) |
06283a640 Add pxe command |
1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 |
{ struct pxe_menu *cfg; cfg = malloc(sizeof(struct pxe_menu)); if (!cfg) return NULL; memset(cfg, 0, sizeof(struct pxe_menu)); INIT_LIST_HEAD(&cfg->labels); |
0e3f3f8a3 Prevent null poin... |
1363 |
if (parse_pxefile_top(cmdtp, menucfg, cfg, 1) < 0) { |
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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; |
32d2ffe73 pxe: simplify men... |
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int i = 1; char *default_num = NULL; |
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/* * Create a menu and add items for all the labels. */ |
fc9d64ffc menu: Add support... |
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m = menu_create(cfg->title, cfg->timeout, cfg->prompt, label_print, NULL, NULL); |
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if (!m) return NULL; list_for_each(pos, &cfg->labels) { label = list_entry(pos, struct pxe_label, list); |
32d2ffe73 pxe: simplify men... |
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sprintf(label->num, "%d", i++); if (menu_item_add(m, label->num, label) != 1) { |
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menu_destroy(m); return NULL; } |
32d2ffe73 pxe: simplify men... |
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if (cfg->default_label && |
8577fec97 pxe: add support ... |
1401 |
(strcmp(label->name, cfg->default_label) == 0)) |
32d2ffe73 pxe: simplify men... |
1402 |
default_num = label->num; |
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1403 1404 1405 1406 1407 1408 |
} /* * After we've created items for each label in the menu, set the * menu's default label if one was specified. */ |
32d2ffe73 pxe: simplify men... |
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if (default_num) { err = menu_default_set(m, default_num); |
06283a640 Add pxe command |
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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. */ |
d7884e047 cmd_pxe.c: Pass a... |
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static void boot_unattempted_labels(cmd_tbl_t *cmdtp, struct pxe_menu *cfg) |
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{ 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) |
d7884e047 cmd_pxe.c: Pass a... |
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label_boot(cmdtp, label); |
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} } /* * 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. */ |
d7884e047 cmd_pxe.c: Pass a... |
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static void handle_pxe_menu(cmd_tbl_t *cmdtp, struct pxe_menu *cfg) |
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{ 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); |
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/* * 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. */ |
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|
500f304b6 pxe: fix handling... |
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if (err == 1) { |
d7884e047 cmd_pxe.c: Pass a... |
1478 |
err = label_boot(cmdtp, choice); |
500f304b6 pxe: fix handling... |
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if (!err) return; } else if (err != -ENOENT) { |
6f40f2749 pxe: make the fir... |
1482 |
return; |
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} |
06283a640 Add pxe command |
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|
d7884e047 cmd_pxe.c: Pass a... |
1485 |
boot_unattempted_labels(cmdtp, cfg); |
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} /* * 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; |
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do_getfile = do_get_tftp; |
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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 { |
4c12eeb8b Convert cmd_usage... |
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return CMD_RET_USAGE; |
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} if (strict_strtoul(pxefile_addr_str, 16, &pxefile_addr_r) < 0) { printf("Invalid pxefile address: %s ", pxefile_addr_str); return 1; } |
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cfg = parse_pxefile(cmdtp, (char *)(pxefile_addr_r)); |
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if (cfg == NULL) { printf("Error parsing config file "); return 1; } |
d7884e047 cmd_pxe.c: Pass a... |
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handle_pxe_menu(cmdtp, cfg); |
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destroy_pxe_menu(cfg); 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, "", "") }; int do_pxe(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { cmd_tbl_t *cp; if (argc < 2) |
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return CMD_RET_USAGE; |
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|
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is_pxe = true; |
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/* 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); |
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return CMD_RET_USAGE; |
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} 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 pxe " "boot [pxefile_addr_r] - boot from the pxe file at pxefile_addr_r " ); |
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/* * Boots a system using a local disk syslinux/extlinux file * * Returns 0 on success, 1 on error. */ 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; |
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is_pxe = false; |
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if (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; |
6d1a3e5fa cmd_pxe.c add any... |
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else if (strstr(argv[3], "any")) do_getfile = do_get_any; |
669df7e42 pxe: add support ... |
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else { printf("Invalid filesystem: %s ", 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 ", pxefile_addr_str); return 1; } |
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1619 |
if (get_pxe_file(cmdtp, filename, (void *)pxefile_addr_r) < 0) { |
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1620 1621 1622 1623 |
printf("Error reading config file "); return 1; } |
0e3f3f8a3 Prevent null poin... |
1624 |
cfg = parse_pxefile(cmdtp, (char *)(pxefile_addr_r)); |
669df7e42 pxe: add support ... |
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if (cfg == NULL) { printf("Error parsing config file "); return 1; } if (prompt) cfg->prompt = 1; |
d7884e047 cmd_pxe.c: Pass a... |
1634 |
handle_pxe_menu(cmdtp, cfg); |
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destroy_pxe_menu(cfg); return 0; } U_BOOT_CMD( sysboot, 7, 1, do_sysboot, "command to get and boot from syslinux files", |
6d1a3e5fa cmd_pxe.c add any... |
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"[-p] <interface> <dev[:part]> <ext2|fat|any> [addr] [filename] " " - load and parse syslinux menu file 'filename' from ext2, fat " " or any filesystem on 'dev' on 'interface' to address 'addr'" |
669df7e42 pxe: add support ... |
1649 |
); |