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"
38 static char **arg_proc_cmdline_modules = NULL;
40 static const char conf_file_dirs[] =
41 "/etc/modules-load.d\0"
42 "/run/modules-load.d\0"
43 "/usr/local/lib/modules-load.d\0"
44 "/usr/lib/modules-load.d\0"
46 "/lib/modules-load.d\0"
50 #pragma GCC diagnostic push
51 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
52 static void systemd_kmod_log(void *data, int priority, const char *file, int line,
53 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) {
61 _cleanup_strv_free_ char **k = NULL;
63 k = strv_split(p, ",");
67 t = strv_merge(arg_proc_cmdline_modules, k);
71 strv_free(arg_proc_cmdline_modules);
72 arg_proc_cmdline_modules = t;
77 static int parse_proc_cmdline(void) {
78 char _cleanup_free_ *line = NULL;
83 if (detect_container(NULL) > 0)
86 r = read_one_line_file("/proc/cmdline", &line);
88 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
92 FOREACH_WORD_QUOTED(w, l, line, state) {
93 char _cleanup_free_ *word;
99 if (startswith(word, "modules-load=")) {
101 r = add_modules(word + 13);
105 } else if (startswith(word, "rd.modules-load=")) {
108 r = add_modules(word + 16);
119 static int load_module(struct kmod_ctx *ctx, const char *m) {
120 const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
121 struct kmod_list *itr, *modlist = NULL;
124 log_debug("load: %s\n", m);
126 r = kmod_module_new_from_lookup(ctx, m, &modlist);
128 log_error("Failed to lookup alias '%s': %s", m, strerror(-r));
133 log_error("Failed to find module '%s'", m);
137 kmod_list_foreach(itr, modlist) {
138 struct kmod_module *mod;
141 mod = kmod_module_get_module(itr);
142 state = kmod_module_get_initstate(mod);
145 case KMOD_MODULE_BUILTIN:
146 log_info("Module '%s' is builtin", kmod_module_get_name(mod));
149 case KMOD_MODULE_LIVE:
150 log_info("Module '%s' is already loaded", kmod_module_get_name(mod));
154 err = kmod_module_probe_insert_module(mod, probe_flags,
155 NULL, NULL, NULL, NULL);
158 log_info("Inserted module '%s'", kmod_module_get_name(mod));
159 else if (err == KMOD_PROBE_APPLY_BLACKLIST)
160 log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
162 log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
168 kmod_module_unref(mod);
171 kmod_module_unref_list(modlist);
176 static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) {
177 _cleanup_fclose_ FILE *f = NULL;
183 r = search_and_fopen_nulstr(path, "re", conf_file_dirs, &f);
185 if (ignore_enoent && r == -ENOENT)
188 log_error("Failed to open %s, ignoring: %s", path, strerror(-r));
192 log_debug("apply: %s\n", path);
194 char line[LINE_MAX], *l;
197 if (!fgets(line, sizeof(line), f)) {
201 log_error("Failed to read file '%s', ignoring: %m", path);
208 if (strchr(COMMENTS, *l))
211 k = load_module(ctx, l);
219 static int help(void) {
221 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
222 "Loads statically configured kernel modules.\n\n"
223 " -h --help Show this help\n",
224 program_invocation_short_name);
229 static int parse_argv(int argc, char *argv[]) {
231 static const struct option options[] = {
232 { "help", no_argument, NULL, 'h' },
241 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
253 log_error("Unknown option code %c", c);
261 int main(int argc, char *argv[]) {
263 struct kmod_ctx *ctx;
265 r = parse_argv(argc, argv);
267 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
269 log_set_target(LOG_TARGET_AUTO);
270 log_parse_environment();
275 if (parse_proc_cmdline() < 0)
278 ctx = kmod_new(NULL, NULL);
280 log_error("Failed to allocate memory for kmod.");
284 kmod_load_resources(ctx);
285 kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
292 for (i = optind; i < argc; i++) {
293 k = apply_file(ctx, argv[i], false);
299 _cleanup_free_ char **files = NULL;
302 STRV_FOREACH(i, arg_proc_cmdline_modules) {
303 k = load_module(ctx, *i);
308 r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
310 log_error("Failed to enumerate modules-load.d files: %s", strerror(-r));
314 STRV_FOREACH(fn, files) {
315 k = apply_file(ctx, *fn, true);
323 strv_free(arg_proc_cmdline_modules);
325 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;