/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** 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 <unistd.h> #include <fcntl.h> #include <errno.h> #include <string.h> #include <sys/stat.h> #include <limits.h> #include <dirent.h> #include <getopt.h> #include <libkmod.h> #include "log.h" #include "util.h" #include "strv.h" #include "conf-files.h" #include "virt.h" #include "fileio.h" static char **arg_proc_cmdline_modules = NULL; static const char conf_file_dirs[] = "/etc/modules-load.d\0" "/run/modules-load.d\0" "/usr/local/lib/modules-load.d\0" "/usr/lib/modules-load.d\0" #ifdef HAVE_SPLIT_USR "/lib/modules-load.d\0" #endif ; #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wformat-nonliteral" static void systemd_kmod_log(void *data, int priority, const char *file, int line, const char *fn, const char *format, va_list args) { log_metav(priority, file, line, fn, format, args); } #pragma GCC diagnostic pop static int add_modules(const char *p) { char **t; _cleanup_strv_free_ char **k = NULL; k = strv_split(p, ","); if (!k) return log_oom(); t = strv_merge(arg_proc_cmdline_modules, k); if (!t) return log_oom(); strv_free(arg_proc_cmdline_modules); arg_proc_cmdline_modules = t; return 0; } static int parse_proc_cmdline(void) { char _cleanup_free_ *line = NULL; char *w, *state; int r; size_t l; if (detect_container(NULL) > 0) return 0; r = read_one_line_file("/proc/cmdline", &line); if (r < 0) { log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); return 0; } FOREACH_WORD_QUOTED(w, l, line, state) { char _cleanup_free_ *word; word = strndup(w, l); if (!word) return log_oom(); if (startswith(word, "modules-load=")) { r = add_modules(word + 13); if (r < 0) return r; } else if (startswith(word, "rd.modules-load=")) { if (in_initrd()) { r = add_modules(word + 16); 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\n", m); r = kmod_module_new_from_lookup(ctx, m, &modlist); if (r < 0) { log_error("Failed to lookup alias '%s': %s", m, strerror(-r)); return r; } 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_info("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("Failed to insert '%s': %s", kmod_module_get_name(mod), strerror(-err)); 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", conf_file_dirs, &f); if (r < 0) { if (ignore_enoent && r == -ENOENT) return 0; log_error("Failed to open %s, ignoring: %s", path, strerror(-r)); return r; } log_debug("apply: %s\n", path); for (;;) { char line[LINE_MAX], *l; int k; if (!fgets(line, sizeof(line), f)) { if (feof(f)) break; log_error("Failed to read file '%s', ignoring: %m", path); return -errno; } l = strstrip(line); if (!*l) continue; if (strchr(COMMENTS, *l)) continue; k = load_module(ctx, l); if (k < 0 && r == 0) r = k; } return r; } static int help(void) { printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" "Loads statically configured kernel modules.\n\n" " -h --help Show this help\n", program_invocation_short_name); return 0; } static int parse_argv(int argc, char *argv[]) { static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { NULL, 0, NULL, 0 } }; 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 '?': return -EINVAL; default: log_error("Unknown option code %c", c); return -EINVAL; } } 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); if (parse_proc_cmdline() < 0) return EXIT_FAILURE; 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_free_ char **files = NULL; char **fn, **i; STRV_FOREACH(i, arg_proc_cmdline_modules) { k = load_module(ctx, *i); if (k < 0) r = EXIT_FAILURE; } r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs); if (r < 0) { log_error("Failed to enumerate modules-load.d files: %s", strerror(-r)); 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; }