diff options
Diffstat (limited to 'modutils/modprobe.c')
| -rw-r--r-- | modutils/modprobe.c | 1103 |
1 files changed, 218 insertions, 885 deletions
diff --git a/modutils/modprobe.c b/modutils/modprobe.c index 412e71d..20b9a74 100644 --- a/modutils/modprobe.c +++ b/modutils/modprobe.c @@ -2,951 +2,284 @@ /* * Modprobe written from scratch for BusyBox * - * Copyright (c) 2002 by Robert Griebl, griebl@gmx.de - * Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au - * Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com - * - * Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr + * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi> + * Copyright (c) 2008 Vladimir Dronnikov * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. -*/ + */ #include "libbb.h" +#include "modutils.h" #include <sys/utsname.h> #include <fnmatch.h> -#define line_buffer bb_common_bufsiz1 - -struct mod_opt_t { /* one-way list of options to pass to a module */ - char * m_opt_val; - struct mod_opt_t * m_next; -}; - -struct dep_t { /* one-way list of dependency rules */ - /* a dependency rule */ - char * m_name; /* the module name*/ - char * m_path; /* the module file path */ - struct mod_opt_t * m_options; /* the module options */ - - unsigned int m_isalias :1; /* the module is an alias */ - unsigned int m_isblacklisted:1; /* the module is blacklisted */ - unsigned int m_reserved :14; /* stuffin' */ - - unsigned int m_depcnt :16; /* the number of dependable module(s) */ - char ** m_deparr; /* the list of dependable module(s) */ - - struct dep_t * m_next; /* the next dependency rule */ +struct modprobe_option { + char *module; + char *option; }; -struct mod_list_t { /* two-way list of modules to process */ - /* a module description */ - const char * m_name; - char * m_path; - struct mod_opt_t * m_options; - - struct mod_list_t * m_prev; - struct mod_list_t * m_next; +struct modprobe_conf { + char probename[MODULE_NAME_LEN]; + llist_t *options; + llist_t *aliases; +#if ENABLE_FEATURE_MODPROBE_BLACKLIST +#define add_to_blacklist(conf, name) llist_add_to(&conf->blacklist, name) +#define check_blacklist(conf, name) (llist_find(conf->blacklist, name) == NULL) + llist_t *blacklist; +#else +#define add_to_blacklist(conf, name) do {} while (0) +#define check_blacklist(conf, name) (1) +#endif }; -struct include_conf_t { - struct dep_t *first; - struct dep_t *current; +#define MODPROBE_OPTS "acdlnrt:VC:" USE_FEATURE_MODPROBE_BLACKLIST("b") +enum { + MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */ + MODPROBE_OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << 1), /* c */ + MODPROBE_OPT_D = (INSMOD_OPT_UNUSED << 2), /* d */ + MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 3), /* l */ + MODPROBE_OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << 4), /* n */ + MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 5), /* r */ + MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << 6), /* t */ + MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << 7), /* V */ + MODPROBE_OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << 8), /* C */ + MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 9) * ENABLE_FEATURE_MODPROBE_BLACKLIST, }; -static struct dep_t *depend; - -#define MAIN_OPT_STR "acdklnqrst:vVC:" -#define INSERT_ALL 1 /* a */ -#define DUMP_CONF_EXIT 2 /* c */ -#define D_OPT_IGNORED 4 /* d */ -#define AUTOCLEAN_FLG 8 /* k */ -#define LIST_ALL 16 /* l */ -#define SHOW_ONLY 32 /* n */ -#define QUIET 64 /* q */ -#define REMOVE_OPT 128 /* r */ -#define DO_SYSLOG 256 /* s */ -#define RESTRICT_DIR 512 /* t */ -#define VERBOSE 1024 /* v */ -#define VERSION_ONLY 2048 /* V */ -#define CONFIG_FILE 4096 /* C */ - -#define autoclean (option_mask32 & AUTOCLEAN_FLG) -#define show_only (option_mask32 & SHOW_ONLY) -#define quiet (option_mask32 & QUIET) -#define remove_opt (option_mask32 & REMOVE_OPT) -#define do_syslog (option_mask32 & DO_SYSLOG) -#define verbose (option_mask32 & VERBOSE) - -static int parse_tag_value(char *buffer, char **ptag, char **pvalue) -{ - char *tag, *value; - - buffer = skip_whitespace(buffer); - tag = value = buffer; - while (!isspace(*value)) { - if (!*value) - return 0; - value++; - } - *value++ = '\0'; - value = skip_whitespace(value); - if (!*value) - return 0; - - *ptag = tag; - *pvalue = value; - - return 1; -} - -/* - * This function appends an option to a list - */ -static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt) -{ - struct mod_opt_t *ol = opt_list; - - if (ol) { - while (ol->m_next) { - ol = ol->m_next; - } - ol->m_next = xzalloc(sizeof(struct mod_opt_t)); - ol = ol->m_next; - } else { - ol = opt_list = xzalloc(sizeof(struct mod_opt_t)); - } - - ol->m_opt_val = xstrdup(opt); - /*ol->m_next = NULL; - done by xzalloc*/ - - return opt_list; -} - -#if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS -/* static char* parse_command_string(char* src, char **dst); - * src: pointer to string containing argument - * dst: pointer to where to store the parsed argument - * return value: the pointer to the first char after the parsed argument, - * NULL if there was no argument parsed (only trailing spaces). - * Note that memory is allocated with xstrdup when a new argument was - * parsed. Don't forget to free it! - */ -#define ARG_EMPTY 0x00 -#define ARG_IN_DQUOTES 0x01 -#define ARG_IN_SQUOTES 0x02 -static char *parse_command_string(char *src, char **dst) -{ - int opt_status = ARG_EMPTY; - char* tmp_str; - - /* Dumb you, I have nothing to do... */ - if (src == NULL) return src; - - /* Skip leading spaces */ - while (*src == ' ') { - src++; - } - /* Is the end of string reached? */ - if (*src == '\0') { - return NULL; - } - /* Reached the start of an argument - * By the way, we duplicate a little too much - * here but what is too much is freed later. */ - *dst = tmp_str = xstrdup(src); - /* Get to the end of that argument */ - while (*tmp_str != '\0' - && (*tmp_str != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES))) - ) { - switch (*tmp_str) { - case '\'': - if (opt_status & ARG_IN_DQUOTES) { - /* Already in double quotes, keep current char as is */ - } else { - /* shift left 1 char, until end of string: get rid of the opening/closing quotes */ - memmove(tmp_str, tmp_str + 1, strlen(tmp_str)); - /* mark me: we enter or leave single quotes */ - opt_status ^= ARG_IN_SQUOTES; - /* Back one char, as we need to re-scan the new char there. */ - tmp_str--; - } - break; - case '"': - if (opt_status & ARG_IN_SQUOTES) { - /* Already in single quotes, keep current char as is */ - } else { - /* shift left 1 char, until end of string: get rid of the opening/closing quotes */ - memmove(tmp_str, tmp_str + 1, strlen(tmp_str)); - /* mark me: we enter or leave double quotes */ - opt_status ^= ARG_IN_DQUOTES; - /* Back one char, as we need to re-scan the new char there. */ - tmp_str--; - } - break; - case '\\': - if (opt_status & ARG_IN_SQUOTES) { - /* Between single quotes: keep as is. */ - } else { - switch (*(tmp_str+1)) { - case 'a': - case 'b': - case 't': - case 'n': - case 'v': - case 'f': - case 'r': - case '0': - /* We escaped a special character. For now, keep - * both the back-slash and the following char. */ - tmp_str++; - src++; - break; - default: - /* We escaped a space or a single or double quote, - * or a back-slash, or a non-escapable char. Remove - * the '\' and keep the new current char as is. */ - memmove(tmp_str, tmp_str + 1, strlen(tmp_str)); - break; - } - } - break; - /* Any other char that is special shall appear here. - * Example: $ starts a variable - case '$': - do_variable_expansion(); - break; - * */ - default: - /* any other char is kept as is. */ - break; - } - tmp_str++; /* Go to next char */ - src++; /* Go to next char to find the end of the argument. */ - } - /* End of string, but still no ending quote */ - if (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)) { - bb_error_msg_and_die("unterminated (single or double) quote in options list: %s", src); - } - *tmp_str++ = '\0'; - *dst = xrealloc(*dst, (tmp_str - *dst)); - return src; -} -#else -#define parse_command_string(src, dst) (0) -#endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */ - -static int is_conf_command(char *buffer, const char *command) -{ - int len = strlen(command); - return ((strstr(buffer, command) == buffer) && - isspace(buffer[len])); -} - -/* - * This function reads aliases and default module options from a configuration file - * (/etc/modprobe.conf syntax). It supports includes (only files, no directories). - */ +static llist_t *loaded; -static int FAST_FUNC include_conf_file_act(const char *filename, - struct stat *statbuf UNUSED_PARAM, - void *userdata, - int depth UNUSED_PARAM); +static int read_config(struct modprobe_conf *conf, const char *path); -static int FAST_FUNC include_conf_dir_act(const char *filename UNUSED_PARAM, - struct stat *statbuf UNUSED_PARAM, - void *userdata UNUSED_PARAM, - int depth) +static void add_option(llist_t **all_opts, const char *module, const char *opts) { - if (depth > 1) - return SKIP; + struct modprobe_option *o; - return TRUE; + o = xzalloc(sizeof(struct modprobe_option)); + if (module) + o->module = filename2modname(module, NULL); + o->option = xstrdup(opts); + llist_add_to(all_opts, o); } -static int include_conf_recursive(struct include_conf_t *conf, const char *filename) +static int FAST_FUNC config_file_action(const char *filename, + struct stat *statbuf UNUSED_PARAM, + void *userdata, + int depth UNUSED_PARAM) { - return recursive_action(filename, ACTION_RECURSE, - include_conf_file_act, - include_conf_dir_act, - conf, 1); -} - -static int FAST_FUNC include_conf_file_act(const char *filename, - struct stat *statbuf UNUSED_PARAM, - void *userdata, - int depth UNUSED_PARAM) -{ - struct include_conf_t *conf = (struct include_conf_t *) userdata; - struct dep_t **first = &conf->first; - struct dep_t **current = &conf->current; - int continuation_line = 0; - FILE *f; + struct modprobe_conf *conf = (struct modprobe_conf *) userdata; + RESERVE_CONFIG_BUFFER(modname, MODULE_NAME_LEN); + char *tokens[3]; + parser_t *p; + int rc = TRUE; if (bb_basename(filename)[0] == '.') - return TRUE; - - f = fopen_for_read(filename); - if (f == NULL) - return FALSE; - - // alias parsing is not 100% correct (no correct handling of continuation lines within an alias)! - - while (fgets(line_buffer, sizeof(line_buffer), f)) { - int l; + goto error; - *strchrnul(line_buffer, '#') = '\0'; - - l = strlen(line_buffer); - - while (l && isspace(line_buffer[l-1])) { - line_buffer[l-1] = '\0'; - l--; - } - - if (l == 0) { - continuation_line = 0; - continue; - } - - if (continuation_line) - continue; - - if (is_conf_command(line_buffer, "alias")) { - char *alias, *mod; - - if (parse_tag_value(line_buffer + 6, &alias, &mod)) { - /* handle alias as a module dependent on the aliased module */ - if (!*current) { - (*first) = (*current) = xzalloc(sizeof(struct dep_t)); - } else { - (*current)->m_next = xzalloc(sizeof(struct dep_t)); - (*current) = (*current)->m_next; - } - (*current)->m_name = xstrdup(alias); - (*current)->m_isalias = 1; - - if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) { - /*(*current)->m_depcnt = 0; - done by xzalloc */ - /*(*current)->m_deparr = 0;*/ - } else { - (*current)->m_depcnt = 1; - (*current)->m_deparr = xmalloc(sizeof(char *)); - (*current)->m_deparr[0] = xstrdup(mod); - } - /*(*current)->m_next = NULL; - done by xzalloc */ - } - } else if (is_conf_command(line_buffer, "options")) { - char *mod, *opt; - - /* split the line in the module/alias name, and options */ - if (parse_tag_value(line_buffer + 8, &mod, &opt)) { - struct dep_t *dt; - - /* find the corresponding module */ - for (dt = *first; dt; dt = dt->m_next) { - if (strcmp(dt->m_name, mod) == 0) - break; - } - if (dt) { - if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) { - char* new_opt = NULL; - while ((opt = parse_command_string(opt, &new_opt))) { - dt->m_options = append_option(dt->m_options, new_opt); - } - } else { - dt->m_options = append_option(dt->m_options, opt); - } - } - } - } else if (is_conf_command(line_buffer, "include")) { - char *includefile; + p = config_open2(filename, fopen_for_read); + if (p == NULL) { + rc = FALSE; + goto error; + } - includefile = skip_whitespace(line_buffer + 8); - include_conf_recursive(conf, includefile); + while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) { + if (strcmp(tokens[0], "alias") == 0) { + filename2modname(tokens[1], modname); + if (tokens[2] && + fnmatch(modname, conf->probename, 0) == 0) + llist_add_to(&conf->aliases, + filename2modname(tokens[2], NULL)); + } else if (strcmp(tokens[0], "options") == 0) { + if (tokens[2]) + add_option(&conf->options, tokens[1], tokens[2]); + } else if (strcmp(tokens[0], "include") == 0) { + read_config(conf, tokens[1]); } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST && - (is_conf_command(line_buffer, "blacklist"))) { - char *mod; - struct dep_t *dt; - - mod = skip_whitespace(line_buffer + 10); - for (dt = *first; dt; dt = dt->m_next) { - if (strcmp(dt->m_name, mod) == 0) - break; - } - if (dt) - dt->m_isblacklisted = 1; + strcmp(tokens[0], "blacklist") == 0) { + add_to_blacklist(conf, xstrdup(tokens[1])); } - } /* while (fgets(...)) */ - - fclose(f); - return TRUE; -} - -static int include_conf_file(struct include_conf_t *conf, - const char *filename) -{ - return include_conf_file_act(filename, NULL, conf, 0); -} - -static int include_conf_file2(struct include_conf_t *conf, - const char *filename, const char *oldname) -{ - if (include_conf_file(conf, filename) == TRUE) - return TRUE; - return include_conf_file(conf, oldname); -} - -/* - * This function builds a list of dependency rules from /lib/modules/`uname -r`/modules.dep. - * It then fills every modules and aliases with their default options, found by parsing - * modprobe.conf (or modules.conf, or conf.modules). - */ -static struct dep_t *build_dep(void) -{ - FILE *f; - struct utsname un; - struct include_conf_t conf = { NULL, NULL }; - char *filename; - int continuation_line = 0; - int k_version; - - uname(&un); /* never fails */ - - k_version = 0; - if (un.release[0] == '2') { - k_version = un.release[2] - '0'; } - - filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/"CONFIG_DEFAULT_DEPMOD_FILE, un.release); - f = fopen_for_read(filename); + config_close(p); +error: if (ENABLE_FEATURE_CLEAN_UP) - free(filename); - if (f == NULL) { - /* Ok, that didn't work. Fall back to looking in /lib/modules */ - f = fopen_for_read(CONFIG_DEFAULT_MODULES_DIR"/"CONFIG_DEFAULT_DEPMOD_FILE); - if (f == NULL) { - bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE); - } - } - - while (fgets(line_buffer, sizeof(line_buffer), f)) { - int l = strlen(line_buffer); - char *p = NULL; - - while (l > 0 && isspace(line_buffer[l-1])) { - line_buffer[l-1] = '\0'; - l--; - } - - if (l == 0) { - continuation_line = 0; - continue; - } - - /* Is this a new module dep description? */ - if (!continuation_line) { - /* find the dep beginning */ - char *col = strchr(line_buffer, ':'); - char *dot = col; - - if (col) { - /* This line is a dep description */ - const char *mods; - char *modpath; - char *mod; - - /* Find the beginning of the module file name */ - *col = '\0'; - mods = bb_basename(line_buffer); - - /* find the path of the module */ - modpath = strchr(line_buffer, '/'); /* ... and this is the path */ - if (!modpath) - modpath = line_buffer; /* module with no path */ - /* find the end of the module name in the file name */ - if (ENABLE_FEATURE_2_6_MODULES && - (k_version > 4) && (col[-3] == '.') && - (col[-2] == 'k') && (col[-1] == 'o')) - dot = col - 3; - else if ((col[-2] == '.') && (col[-1] == 'o')) - dot = col - 2; - - mod = xstrndup(mods, dot - mods); - - /* enqueue new module */ - if (!conf.current) { - conf.first = conf.current = xzalloc(sizeof(struct dep_t)); - } else { - conf.current->m_next = xzalloc(sizeof(struct dep_t)); - conf.current = conf.current->m_next; - } - conf.current->m_name = mod; - conf.current->m_path = xstrdup(modpath); - /*current->m_options = NULL; - xzalloc did it*/ - /*current->m_isalias = 0;*/ - /*current->m_depcnt = 0;*/ - /*current->m_deparr = 0;*/ - /*current->m_next = 0;*/ - - p = col + 1; - } else - /* this line is not a dep description */ - p = NULL; - } else - /* It's a dep description continuation */ - p = line_buffer; - - /* p points to the first dependable module; if NULL, no dependable module */ - if (p && (p = skip_whitespace(p))[0] != '\0') { - char *end = &line_buffer[l-1]; - const char *deps; - char *dep; - char *next; - int ext = 0; - - while (isblank(*end) || (*end == '\\')) - end--; - - do { - /* search the end of the dependency */ - next = strchr(p, ' '); - if (next) { - *next = '\0'; - next--; - } else - next = end; - - /* find the beginning of the module file name */ - deps = bb_basename(p); - if (deps == p) - deps = skip_whitespace(deps); - - /* find the end of the module name in the file name */ - if (ENABLE_FEATURE_2_6_MODULES - && (k_version > 4) && (next[-2] == '.') - && (next[-1] == 'k') && (next[0] == 'o')) - ext = 3; - else if ((next[-1] == '.') && (next[0] == 'o')) - ext = 2; - - /* Cope with blank lines */ - if ((next - deps - ext + 1) <= 0) - continue; - dep = xstrndup(deps, next - deps - ext + 1); - - /* Add the new dependable module name */ - conf.current->m_deparr = xrealloc_vector(conf.current->m_deparr, 2, conf.current->m_depcnt); - conf.current->m_deparr[conf.current->m_depcnt++] = dep; - - p = next + 2; - } while (next < end); - } - - /* is there other dependable module(s) ? */ - continuation_line = (line_buffer[l-1] == '\\'); - } /* while (fgets(...)) */ - fclose(f); - - /* - * First parse system-specific options and aliases - * as they take precedence over the kernel ones. - * >=2.6: we only care about modprobe.conf - * <=2.4: we care about modules.conf and conf.modules - */ - { - int r = FALSE; - - if (ENABLE_FEATURE_2_6_MODULES) { - if (include_conf_file(&conf, "/etc/modprobe.conf")) - r = TRUE; - if (include_conf_recursive(&conf, "/etc/modprobe.d")) - r = TRUE; - } - if (ENABLE_FEATURE_2_4_MODULES && !r) - include_conf_file2(&conf, - "/etc/modules.conf", - "/etc/conf.modules"); - } - - /* Only 2.6 has a modules.alias file */ - if (ENABLE_FEATURE_2_6_MODULES) { - /* Parse kernel-declared module aliases */ - filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.alias", un.release); - include_conf_file2(&conf, - filename, - CONFIG_DEFAULT_MODULES_DIR"/modules.alias"); - if (ENABLE_FEATURE_CLEAN_UP) - free(filename); - - /* Parse kernel-declared symbol aliases */ - filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.symbols", un.release); - include_conf_file2(&conf, - filename, - CONFIG_DEFAULT_MODULES_DIR"/modules.symbols"); - if (ENABLE_FEATURE_CLEAN_UP) - free(filename); - } - - return conf.first; -} - -/* return 1 = loaded, 0 = not loaded, -1 = can't tell */ -static int already_loaded(const char *name) -{ - FILE *f; - int ret; - - f = fopen_for_read("/proc/modules"); - if (f == NULL) - return -1; - - ret = 0; - while (fgets(line_buffer, sizeof(line_buffer), f)) { - char *p = line_buffer; - const char *n = name; - - while (1) { - char cn = *n; - char cp = *p; - if (cp == ' ' || cp == '\0') { - if (cn == '\0') { - ret = 1; /* match! */ - goto done; - } - break; /* no match on this line, take next one */ - } - if (cn == '-') cn = '_'; - if (cp == '-') cp = '_'; - if (cp != cn) - break; /* no match on this line, take next one */ - n++; - p++; - } - } - done: - fclose(f); - return ret; + RELEASE_CONFIG_BUFFER(modname); + return rc; } -static int mod_process(const struct mod_list_t *list, int do_insert) +static int read_config(struct modprobe_conf *conf, const char *path) { - int rc = 0; - char **argv = NULL; - struct mod_opt_t *opts; - int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */ - int argc; - - while (list) { - argc = 0; - if (ENABLE_FEATURE_CLEAN_UP) - argc_malloc = 0; - /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory - * each time we allocate memory for argv. - * But it is (quite) small amounts of memory that leak each - * time a module is loaded, and it is reclaimed when modprobe - * exits anyway (even when standalone shell? Yes --vda). - * This could become a problem when loading a module with LOTS of - * dependencies, with LOTS of options for each dependencies, with - * very little memory on the target... But in that case, the module - * would not load because there is no more memory, so there's no - * problem. */ - /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */ - argv = xmalloc(6 * sizeof(char*)); - if (do_insert) { - if (already_loaded(list->m_name) != 1) { - argv[argc++] = (char*)"insmod"; - if (ENABLE_FEATURE_2_4_MODULES) { - if (do_syslog) - argv[argc++] = (char*)"-s"; - if (autoclean) - argv[argc++] = (char*)"-k"; - if (quiet) - argv[argc++] = (char*)"-q"; - else if (verbose) /* verbose and quiet are mutually exclusive */ - argv[argc++] = (char*)"-v"; - } - argv[argc++] = list->m_path; - if (ENABLE_FEATURE_CLEAN_UP) - argc_malloc = argc; - opts = list->m_options; - while (opts) { - /* Add one more option */ - argc++; - argv = xrealloc(argv, (argc + 1) * sizeof(char*)); - argv[argc-1] = opts->m_opt_val; - opts = opts->m_next; - } - } - } else { - /* modutils uses short name for removal */ - if (already_loaded(list->m_name) != 0) { - argv[argc++] = (char*)"rmmod"; - if (do_syslog) - argv[argc++] = (char*)"-s"; - argv[argc++] = (char*)list->m_name; - if (ENABLE_FEATURE_CLEAN_UP) - argc_malloc = argc; - } - } - argv[argc] = NULL; - - if (argc) { - if (verbose) { - printf("%s module %s\n", do_insert?"Loading":"Unloading", list->m_name); - } - if (!show_only) { - int rc2 = wait4pid(spawn(argv)); - - if (do_insert) { - rc = rc2; /* only last module matters */ - } else if (!rc2) { - rc = 0; /* success if remove any mod */ - } - } - if (ENABLE_FEATURE_CLEAN_UP) { - /* the last value in the array has index == argc, but - * it is the terminating NULL, so we must not free it. */ - while (argc_malloc < argc) { - free(argv[argc_malloc++]); - } - } - } - if (ENABLE_FEATURE_CLEAN_UP) { - free(argv); - argv = NULL; - } - list = do_insert ? list->m_prev : list->m_next; - } - return (show_only) ? 0 : rc; + return recursive_action(path, ACTION_RECURSE | ACTION_QUIET, + config_file_action, NULL, conf, 1); } -/* - * Check the matching between a pattern and a module name. - * We need this as *_* is equivalent to *-*, even in pattern matching. - */ -static int check_pattern(const char* pat_src, const char* mod_src) +static char *gather_options(llist_t *first, const char *module, int usecmdline) { - int ret; - - if (ENABLE_FEATURE_MODPROBE_FANCY_ALIAS) { - char* pat; - char* mod; - char* p; + struct modprobe_option *opt; + llist_t *n; + char *opts = xstrdup(""); + int optlen = 0; - pat = xstrdup(pat_src); - mod = xstrdup(mod_src); + for (n = first; n != NULL; n = n->link) { + opt = (struct modprobe_option *) n->data; - for (p = pat; (p = strchr(p, '-')); *p++ = '_'); - for (p = mod; (p = strchr(p, '-')); *p++ = '_'); - - ret = fnmatch(pat, mod, 0); - - if (ENABLE_FEATURE_CLEAN_UP) { - free(pat); - free(mod); - } + if (opt->module == NULL && !usecmdline) + continue; + if (opt->module != NULL && strcmp(opt->module, module) != 0) + continue; - return ret; + opts = xrealloc(opts, optlen + strlen(opt->option) + 2); + optlen += sprintf(opts + optlen, "%s ", opt->option); } - return fnmatch(pat_src, mod_src, 0); + return opts; } -/* - * Builds the dependency list (aka stack) of a module. - * head: the highest module in the stack (last to insmod, first to rmmod) - * tail: the lowest module in the stack (first to insmod, last to rmmod) - */ -static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **tail) +static int do_modprobe(struct modprobe_conf *conf, const char *module) { - struct mod_list_t *find; - struct dep_t *dt; - struct mod_opt_t *opt = NULL; - char *path = NULL; - - /* Search for the given module name amongst all dependency rules. - * The module name in a dependency rule can be a shell pattern, - * so try to match the given module name against such a pattern. - * Of course if the name in the dependency rule is a plain string, - * then we consider it a pattern, and matching will still work. */ - for (dt = depend; dt; dt = dt->m_next) { - if (check_pattern(dt->m_name, mod) == 0) { - break; - } - } - - if (!dt) { - bb_error_msg("module %s not found", mod); - return; - } + RESERVE_CONFIG_BUFFER(modname, MODULE_NAME_LEN); + llist_t *deps = NULL; + char *fn, *options, *colon = NULL, *tokens[2]; + parser_t *p; + int rc = -1; + + p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, fopen_for_read); + if (p == NULL) + goto error; + + while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) { + colon = last_char_is(tokens[0], ':'); + if (colon == NULL) + continue; - // resolve alias names - while (dt->m_isalias) { - if (dt->m_depcnt == 1) { - struct dep_t *adt; + filename2modname(tokens[0], modname); + if (strcmp(modname, module) == 0) + break; - for (adt = depend; adt; adt = adt->m_next) { - if (check_pattern(adt->m_name, dt->m_deparr[0]) == 0 && - !(ENABLE_FEATURE_MODPROBE_BLACKLIST && - adt->m_isblacklisted)) - break; - } - if (adt) { - /* This is the module we are aliased to */ - struct mod_opt_t *opts = dt->m_options; - /* Option of the alias are appended to the options of the module */ - while (opts) { - adt->m_options = append_option(adt->m_options, opts->m_opt_val); - opts = opts->m_next; - } - dt = adt; - } else { - bb_error_msg("module %s not found", mod); - return; - } - } else { - bb_error_msg("bad alias %s", dt->m_name); - return; - } + colon = NULL; } - - mod = dt->m_name; - path = dt->m_path; - opt = dt->m_options; - - // search for duplicates - for (find = *head; find; find = find->m_next) { - if (strcmp(mod, find->m_name) == 0) { - // found -> dequeue it - - if (find->m_prev) - find->m_prev->m_next = find->m_next; - else - *head = find->m_next; - - if (find->m_next) - find->m_next->m_prev = find->m_prev; - else - *tail = find->m_prev; - - break; // there can be only one duplicate + if (colon == NULL) + goto error_not_found; + + colon[0] = '\0'; + llist_add_to(&deps, xstrdup(tokens[0])); + if (tokens[1]) + string_to_llist(tokens[1], &deps, " "); + + if (!(option_mask32 & MODPROBE_OPT_REMOVE)) + deps = llist_rev(deps); + + rc = 0; + while (deps && rc == 0) { + fn = llist_pop(&deps); + filename2modname(fn, modname); + if (option_mask32 & MODPROBE_OPT_REMOVE) { + if (bb_delete_module(modname, O_EXCL) != 0) + rc = errno; + } else if (llist_find(loaded, modname) == NULL) { + options = gather_options(conf->options, modname, + strcmp(modname, module) == 0); + rc = bb_init_module(fn, options); + if (rc == 0) + llist_add_to(&loaded, xstrdup(modname)); + if (ENABLE_FEATURE_CLEAN_UP) + free(options); } - } - - if (!find) { // did not find a duplicate - find = xzalloc(sizeof(struct mod_list_t)); - find->m_name = mod; - find->m_path = path; - find->m_options = opt; - } - - // enqueue at tail - if (*tail) - (*tail)->m_next = find; - find->m_prev = *tail; - find->m_next = NULL; /* possibly NOT done by xzalloc! */ - - if (!*head) - *head = find; - *tail = find; - - if (dt) { - int i; - /* Add all dependable module for that new module */ - for (i = 0; i < dt->m_depcnt; i++) - check_dep(dt->m_deparr[i], head, tail); - } -} - -static int mod_insert(char **argv) -{ - struct mod_list_t *tail = NULL; - struct mod_list_t *head = NULL; - char *modname = *argv++; - int rc; - - // get dep list for module mod - check_dep(modname, &head, &tail); - - rc = 1; - if (head && tail) { - while (*argv) - head->m_options = append_option(head->m_options, *argv++); - - // process tail ---> head - rc = mod_process(tail, 1); - if (rc) { - /* - * In case of using udev, multiple instances of modprobe can be - * spawned to load the same module (think of two same usb devices, - * for example; or cold-plugging at boot time). Thus we shouldn't - * fail if the module was loaded, and not by us. - */ - if (already_loaded(modname)) - rc = 0; - } + if (ENABLE_FEATURE_CLEAN_UP) + free(fn); } - return rc; -} - -static int mod_remove(char *modname) -{ - static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL }; - - int rc; - struct mod_list_t *head = NULL; - struct mod_list_t *tail = NULL; - if (modname) - check_dep(modname, &head, &tail); - else // autoclean - head = tail = (struct mod_list_t*) &rm_a_dummy; - - rc = 1; - if (head && tail) - rc = mod_process(head, 0); // process head ---> tail +error_not_found: + config_close(p); +error: + if (ENABLE_FEATURE_CLEAN_UP) + RELEASE_CONFIG_BUFFER(modname); + if (rc > 0 && !(option_mask32 & INSMOD_OPT_SILENT)) + bb_error_msg("Failed to %sload module %s: %s.", + (option_mask32 & MODPROBE_OPT_REMOVE) ? "un" : "", + module, moderror(rc)); return rc; } int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int modprobe_main(int argc UNUSED_PARAM, char **argv) { - int rc = EXIT_SUCCESS; - unsigned opt; - char *unused; + struct utsname uts; + int num_modules, i, rc; + llist_t *options = NULL; + parser_t *parser; opt_complementary = "q-v:v-q"; - opt = getopt32(argv, MAIN_OPT_STR, &unused, &unused); + getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS, + NULL, NULL); argv += optind; - - if (opt & (DUMP_CONF_EXIT | LIST_ALL)) - return EXIT_SUCCESS; - if (opt & (RESTRICT_DIR | CONFIG_FILE)) - bb_error_msg_and_die("-t and -C not supported"); - - depend = build_dep(); - - if (!depend) - bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE); - - if (remove_opt) { - do { - /* (*argv) can be NULL here */ - if (mod_remove(*argv)) { - bb_perror_msg("failed to %s module %s", "remove", - *argv); - rc = EXIT_FAILURE; - } - } while (*argv && *++argv); + argc -= optind; + + if (option_mask32 & (MODPROBE_OPT_DUMP_ONLY | MODPROBE_OPT_LIST_ONLY | + MODPROBE_OPT_SHOW_ONLY)) + bb_error_msg_and_die("not supported"); + + /* goto modules location */ + xchdir(CONFIG_DEFAULT_MODULES_DIR); + uname(&uts); + xchdir(uts.release); + + if (option_mask32 & (MODPROBE_OPT_REMOVE | MODPROBE_OPT_INSERT_ALL)) { + /* each parameter is a module name */ + num_modules = argc; + if (num_modules == 0) { + if (bb_delete_module(NULL, O_NONBLOCK|O_EXCL) != 0) + bb_perror_msg_and_die("rmmod"); + return EXIT_SUCCESS; + } } else { - if (!*argv) - bb_error_msg_and_die("no module or pattern provided"); + /* the only module, the rest of parameters are options */ + num_modules = 1; + add_option(&options, NULL, parse_cmdline_module_options(argv)); + } - if (mod_insert(argv)) - bb_perror_msg_and_die("failed to %s module %s", "load", *argv); + /* cache modules */ + parser = config_open2("/proc/modules", fopen_for_read); + if (parser) { + char *s; + while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) + llist_add_to(&loaded, xstrdup(s)); + config_close(parser); } - /* Here would be a good place to free up memory allocated during the dependencies build. */ + for (i = 0; i < num_modules; i++) { + struct modprobe_conf *conf; + + conf = xzalloc(sizeof(struct modprobe_conf)); + conf->options = options; + filename2modname(argv[i], conf->probename); + read_config(conf, "/etc/modprobe.conf"); + read_config(conf, "/etc/modprobe.d"); + if (ENABLE_FEATURE_MODUTILS_SYMBOLS && + conf->aliases == NULL && strncmp(argv[i], "symbol:", 7) == 0) + read_config(conf, "modules.symbols"); + + if (ENABLE_FEATURE_MODUTILS_ALIAS && conf->aliases == NULL) + read_config(conf, "modules.alias"); + + if (conf->aliases == NULL) { + /* Try if module by literal name is found; literal + * names are blacklist only if '-b' is given. */ + if (!(option_mask32 & MODPROBE_OPT_BLACKLIST) || + check_blacklist(conf, conf->probename)) { + rc = do_modprobe(conf, conf->probename); + if (rc < 0 && !(option_mask32 & INSMOD_OPT_SILENT)) + bb_error_msg("Module %s not found.", argv[i]); + } + } else { + /* Probe all aliases */ + while (conf->aliases != NULL) { + char *realname = llist_pop(&conf->aliases); + if (check_blacklist(conf, realname)) + do_modprobe(conf, realname); + if (ENABLE_FEATURE_CLEAN_UP) + free(realname); + } + } + } - return rc; + return EXIT_SUCCESS; } |