1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
35 #include "conf-files.h"
39 static char **arg_proc_cmdline_modules = NULL;
41 static const char conf_file_dirs[] =
42 "/etc/modules-load.d\0"
43 "/run/modules-load.d\0"
44 "/usr/local/lib/modules-load.d\0"
45 "/usr/lib/modules-load.d\0"
47 "/lib/modules-load.d\0"
51 #pragma GCC diagnostic push
52 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
53 static void systemd_kmod_log(void *data, int priority, const char *file, int line,
54 const char *fn, const char *format, va_list args) {
55 log_metav(priority, file, line, fn, format, args);
57 #pragma GCC diagnostic pop
59 static int add_modules(const char *p) {
60 _cleanup_strv_free_ char **k = NULL;
62 k = strv_split(p, ",");
66 if (strv_extend_strv(&arg_proc_cmdline_modules, k) < 0)
72 static int parse_proc_cmdline(void) {
73 _cleanup_free_ char *line = NULL;
78 r = proc_cmdline(&line);
80 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
84 FOREACH_WORD_QUOTED(w, l, line, state) {
85 _cleanup_free_ char *word;
91 if (startswith(word, "modules-load=")) {
93 r = add_modules(word + 13);
97 } else if (startswith(word, "rd.modules-load=")) {
100 r = add_modules(word + 16);
111 static int load_module(struct kmod_ctx *ctx, const char *m) {
112 const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
113 struct kmod_list *itr, *modlist = NULL;
116 log_debug("load: %s", m);
118 r = kmod_module_new_from_lookup(ctx, m, &modlist);
120 log_error("Failed to lookup alias '%s': %s", m, strerror(-r));
125 log_error("Failed to find module '%s'", m);
129 kmod_list_foreach(itr, modlist) {
130 struct kmod_module *mod;
133 mod = kmod_module_get_module(itr);
134 state = kmod_module_get_initstate(mod);
137 case KMOD_MODULE_BUILTIN:
138 log_info("Module '%s' is builtin", kmod_module_get_name(mod));
141 case KMOD_MODULE_LIVE:
142 log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
146 err = kmod_module_probe_insert_module(mod, probe_flags,
147 NULL, NULL, NULL, NULL);
150 log_info("Inserted module '%s'", kmod_module_get_name(mod));
151 else if (err == KMOD_PROBE_APPLY_BLACKLIST)
152 log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
154 log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
160 kmod_module_unref(mod);
163 kmod_module_unref_list(modlist);
168 static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) {
169 _cleanup_fclose_ FILE *f = NULL;
175 r = search_and_fopen_nulstr(path, "re", conf_file_dirs, &f);
177 if (ignore_enoent && r == -ENOENT)
180 log_error("Failed to open %s, ignoring: %s", path, strerror(-r));
184 log_debug("apply: %s", path);
186 char line[LINE_MAX], *l;
189 if (!fgets(line, sizeof(line), f)) {
193 log_error("Failed to read file '%s', ignoring: %m", path);
200 if (strchr(COMMENTS "\n", *l))
203 k = load_module(ctx, l);
211 static int help(void) {
213 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
214 "Loads statically configured kernel modules.\n\n"
215 " -h --help Show this help\n"
216 " --version Show package version\n",
217 program_invocation_short_name);
222 static int parse_argv(int argc, char *argv[]) {
228 static const struct option options[] = {
229 { "help", no_argument, NULL, 'h' },
230 { "version", no_argument, NULL, ARG_VERSION },
239 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
247 puts(PACKAGE_STRING);
248 puts(SYSTEMD_FEATURES);
255 assert_not_reached("Unhandled option");
262 int main(int argc, char *argv[]) {
264 struct kmod_ctx *ctx;
266 r = parse_argv(argc, argv);
268 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
270 log_set_target(LOG_TARGET_AUTO);
271 log_parse_environment();
276 if (parse_proc_cmdline() < 0)
279 ctx = kmod_new(NULL, NULL);
281 log_error("Failed to allocate memory for kmod.");
285 kmod_load_resources(ctx);
286 kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
293 for (i = optind; i < argc; i++) {
294 k = apply_file(ctx, argv[i], false);
300 _cleanup_free_ char **files = NULL;
303 STRV_FOREACH(i, arg_proc_cmdline_modules) {
304 k = load_module(ctx, *i);
309 r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
311 log_error("Failed to enumerate modules-load.d files: %s", strerror(-r));
315 STRV_FOREACH(fn, files) {
316 k = apply_file(ctx, *fn, true);
324 strv_free(arg_proc_cmdline_modules);
326 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;