/*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <errno.h> #include <getopt.h> #include <libkmod.h> #include <limits.h> #include <string.h> #include <sys/stat.h> #include "conf-files.h" #include "def.h" #include "fd-util.h" #include "fileio.h" #include "log.h" #include "proc-cmdline.h" #include "string-util.h" #include "strv.h" #include "util.h" static char **arg_proc_cmdline_modules = NULL; static const char conf_file_dirs[] = CONF_PATHS_NULSTR("modules-load.d"); static void systemd_kmod_log(void *data, int priority, const char *file, int line, const char *fn, const char *format, va_list args) { DISABLE_WARNING_FORMAT_NONLITERAL; log_internalv(priority, 0, file, line, fn, format, args); REENABLE_WARNING; } static int add_modules(const char *p) { _cleanup_strv_free_ char **k = NULL; k = strv_split(p, ","); if (!k) return log_oom(); if (strv_extend_strv(&arg_proc_cmdline_modules, k, true) < 0) return log_oom(); return 0; } static int parse_proc_cmdline_item(const char *key, const char *value) { int r; if (STR_IN_SET(key, "modules-load", "rd.modules-load") && value) { r = add_modules(value); if (r < 0) return r; } return 0; } static int load_module(struct kmod_ctx *ctx, const char *m) { const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST; struct kmod_list *itr, *modlist = NULL; int r = 0; log_debug("load: %s", m); r = kmod_module_new_from_lookup(ctx, m, &modlist); if (r < 0) return log_error_errno(r, "Failed to lookup alias '%s': %m", m); if (!modlist) { log_error("Failed to find module '%s'", m); return -ENOENT; } kmod_list_foreach(itr, modlist) { struct kmod_module *mod; int state, err; mod = kmod_module_get_module(itr); state = kmod_module_get_initstate(mod); switch (state) { case KMOD_MODULE_BUILTIN: log_info("Module '%s' is builtin", kmod_module_get_name(mod)); break; case KMOD_MODULE_LIVE: log_debug("Module '%s' is already loaded", kmod_module_get_name(mod)); break; default: err = kmod_module_probe_insert_module(mod, probe_flags, NULL, NULL, NULL, NULL); if (err == 0) log_info("Inserted module '%s'", kmod_module_get_name(mod)); else if (err == KMOD_PROBE_APPLY_BLACKLIST) log_info("Module '%s' is blacklisted", kmod_module_get_name(mod)); else { log_error_errno(err, "Failed to insert '%s': %m", kmod_module_get_name(mod)); r = err; } } kmod_module_unref(mod); } kmod_module_unref_list(modlist); return r; } static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) { _cleanup_fclose_ FILE *f = NULL; int r; assert(ctx); assert(path); r = search_and_fopen_nulstr(path, "re", NULL, conf_file_dirs, &f); if (r < 0) { if (ignore_enoent && r == -ENOENT) return 0; return log_error_errno(r, "Failed to open %s, ignoring: %m", path); } log_debug("apply: %s", path); for (;;) { char line[LINE_MAX], *l; int k; if (!fgets(line, sizeof(line), f)) { if (feof(f)) break; return log_error_errno(errno, "Failed to read file '%s', ignoring: %m", path); } l = strstrip(line); if (!*l) continue; if (strchr(COMMENTS "\n", *l)) continue; k = load_module(ctx, l); if (k < 0 && r == 0) r = k; } return r; } static void help(void) { printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" "Loads statically configured kernel modules.\n\n" " -h --help Show this help\n" " --version Show package version\n", program_invocation_short_name); } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, {} }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) switch (c) { case 'h': help(); return 0; case ARG_VERSION: return version(); case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } return 1; } int main(int argc, char *argv[]) { int r, k; struct kmod_ctx *ctx; r = parse_argv(argc, argv); if (r <= 0) return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); umask(0022); r = parse_proc_cmdline(parse_proc_cmdline_item); if (r < 0) log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); ctx = kmod_new(NULL, NULL); if (!ctx) { log_error("Failed to allocate memory for kmod."); goto finish; } kmod_load_resources(ctx); kmod_set_log_fn(ctx, systemd_kmod_log, NULL); r = 0; if (argc > optind) { int i; for (i = optind; i < argc; i++) { k = apply_file(ctx, argv[i], false); if (k < 0 && r == 0) r = k; } } else { _cleanup_strv_free_ char **files = NULL; char **fn, **i; STRV_FOREACH(i, arg_proc_cmdline_modules) { k = load_module(ctx, *i); if (k < 0 && r == 0) r = k; } k = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs); if (k < 0) { log_error_errno(k, "Failed to enumerate modules-load.d files: %m"); if (r == 0) r = k; goto finish; } STRV_FOREACH(fn, files) { k = apply_file(ctx, *fn, true); if (k < 0 && r == 0) r = k; } } finish: kmod_unref(ctx); strv_free(arg_proc_cmdline_modules); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }