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)
56 log_metav(priority, file, line, fn, format, args);
58 #pragma GCC diagnostic pop
60 static int add_modules(const char *p) {
62 _cleanup_strv_free_ char **k = NULL;
64 k = strv_split(p, ",");
68 t = strv_merge(arg_proc_cmdline_modules, k);
72 strv_free(arg_proc_cmdline_modules);
73 arg_proc_cmdline_modules = t;
78 static int parse_proc_cmdline(void) {
79 _cleanup_free_ char *line = NULL;
84 r = proc_cmdline(&line);
86 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
90 FOREACH_WORD_QUOTED(w, l, line, state) {
91 _cleanup_free_ char *word;
97 if (startswith(word, "modules-load=")) {
99 r = add_modules(word + 13);
103 } else if (startswith(word, "rd.modules-load=")) {
106 r = add_modules(word + 16);
117 static int load_module(struct kmod_ctx *ctx, const char *m) {
118 const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
119 struct kmod_list *itr, *modlist = NULL;
122 log_debug("load: %s\n", m);
124 r = kmod_module_new_from_lookup(ctx, m, &modlist);
126 log_error("Failed to lookup alias '%s': %s", m, strerror(-r));
131 log_error("Failed to find module '%s'", m);
135 kmod_list_foreach(itr, modlist) {
136 struct kmod_module *mod;
139 mod = kmod_module_get_module(itr);
140 state = kmod_module_get_initstate(mod);
143 case KMOD_MODULE_BUILTIN:
144 log_info("Module '%s' is builtin", kmod_module_get_name(mod));
147 case KMOD_MODULE_LIVE:
148 log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
152 err = kmod_module_probe_insert_module(mod, probe_flags,
153 NULL, NULL, NULL, NULL);
156 log_info("Inserted module '%s'", kmod_module_get_name(mod));
157 else if (err == KMOD_PROBE_APPLY_BLACKLIST)
158 log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
160 log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
166 kmod_module_unref(mod);
169 kmod_module_unref_list(modlist);
174 static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) {
175 _cleanup_fclose_ FILE *f = NULL;
181 r = search_and_fopen_nulstr(path, "re", conf_file_dirs, &f);
183 if (ignore_enoent && r == -ENOENT)
186 log_error("Failed to open %s, ignoring: %s", path, strerror(-r));
190 log_debug("apply: %s\n", path);
192 char line[LINE_MAX], *l;
195 if (!fgets(line, sizeof(line), f)) {
199 log_error("Failed to read file '%s', ignoring: %m", path);
206 if (strchr(COMMENTS "\n", *l))
209 k = load_module(ctx, l);
217 static int help(void) {
219 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
220 "Loads statically configured kernel modules.\n\n"
221 " -h --help Show this help\n"
222 " --version Show package version\n",
223 program_invocation_short_name);
228 static int parse_argv(int argc, char *argv[]) {
234 static const struct option options[] = {
235 { "help", no_argument, NULL, 'h' },
236 { "version", no_argument, NULL, ARG_VERSION },
245 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
253 puts(PACKAGE_STRING);
254 puts(SYSTEMD_FEATURES);
261 assert_not_reached("Unhandled option");
268 int main(int argc, char *argv[]) {
270 struct kmod_ctx *ctx;
272 r = parse_argv(argc, argv);
274 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
276 log_set_target(LOG_TARGET_AUTO);
277 log_parse_environment();
282 if (parse_proc_cmdline() < 0)
285 ctx = kmod_new(NULL, NULL);
287 log_error("Failed to allocate memory for kmod.");
291 kmod_load_resources(ctx);
292 kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
299 for (i = optind; i < argc; i++) {
300 k = apply_file(ctx, argv[i], false);
306 _cleanup_free_ char **files = NULL;
309 STRV_FOREACH(i, arg_proc_cmdline_modules) {
310 k = load_module(ctx, *i);
315 r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
317 log_error("Failed to enumerate modules-load.d files: %s", strerror(-r));
321 STRV_FOREACH(fn, files) {
322 k = apply_file(ctx, *fn, true);
330 strv_free(arg_proc_cmdline_modules);
332 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;