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 char _cleanup_free_ *line = NULL;
84 if (detect_container(NULL) > 0)
87 r = read_one_line_file("/proc/cmdline", &line);
89 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
93 FOREACH_WORD_QUOTED(w, l, line, state) {
94 char _cleanup_free_ *word;
100 if (startswith(word, "modules-load=")) {
102 r = add_modules(word + 13);
106 } else if (startswith(word, "rd.modules-load=")) {
109 r = add_modules(word + 16);
120 static int load_module(struct kmod_ctx *ctx, const char *m) {
121 const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
122 struct kmod_list *itr, *modlist = NULL;
125 log_debug("load: %s\n", m);
127 r = kmod_module_new_from_lookup(ctx, m, &modlist);
129 log_error("Failed to lookup alias '%s': %s", m, strerror(-r));
134 log_error("Failed to find module '%s'", m);
138 kmod_list_foreach(itr, modlist) {
139 struct kmod_module *mod;
142 mod = kmod_module_get_module(itr);
143 state = kmod_module_get_initstate(mod);
146 case KMOD_MODULE_BUILTIN:
147 log_info("Module '%s' is builtin", kmod_module_get_name(mod));
150 case KMOD_MODULE_LIVE:
151 log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
155 err = kmod_module_probe_insert_module(mod, probe_flags,
156 NULL, NULL, NULL, NULL);
159 log_info("Inserted module '%s'", kmod_module_get_name(mod));
160 else if (err == KMOD_PROBE_APPLY_BLACKLIST)
161 log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
163 log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
169 kmod_module_unref(mod);
172 kmod_module_unref_list(modlist);
177 static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) {
178 _cleanup_fclose_ FILE *f = NULL;
184 r = search_and_fopen_nulstr(path, "re", conf_file_dirs, &f);
186 if (ignore_enoent && r == -ENOENT)
189 log_error("Failed to open %s, ignoring: %s", path, strerror(-r));
193 log_debug("apply: %s\n", path);
195 char line[LINE_MAX], *l;
198 if (!fgets(line, sizeof(line), f)) {
202 log_error("Failed to read file '%s', ignoring: %m", path);
209 if (strchr(COMMENTS, *l))
212 k = load_module(ctx, l);
220 static int help(void) {
222 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
223 "Loads statically configured kernel modules.\n\n"
224 " -h --help Show this help\n",
225 program_invocation_short_name);
230 static int parse_argv(int argc, char *argv[]) {
232 static const struct option options[] = {
233 { "help", no_argument, NULL, 'h' },
242 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
254 log_error("Unknown option code %c", c);
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;