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b2423f1f LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
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 | |
b2423f1f LP |
11 | (at your option) any later version. |
12 | ||
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
b2423f1f | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
b2423f1f LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <unistd.h> | |
23 | #include <fcntl.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
26 | #include <sys/stat.h> | |
27 | #include <limits.h> | |
28 | #include <dirent.h> | |
fabe5c0e | 29 | #include <getopt.h> |
83684a35 | 30 | #include <libkmod.h> |
b2423f1f LP |
31 | |
32 | #include "log.h" | |
33 | #include "util.h" | |
34 | #include "strv.h" | |
2c21044f | 35 | #include "conf-files.h" |
03658d4f | 36 | #include "virt.h" |
a5c32cff | 37 | #include "fileio.h" |
03658d4f LP |
38 | |
39 | static char **arg_proc_cmdline_modules = NULL; | |
b2423f1f | 40 | |
fabe5c0e LP |
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" | |
46 | #ifdef HAVE_SPLIT_USR | |
47 | "/lib/modules-load.d\0" | |
48 | #endif | |
49 | ; | |
50 | ||
cdb454f2 LP |
51 | #pragma GCC diagnostic push |
52 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
83684a35 TG |
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 | { | |
e62abb62 | 56 | log_metav(priority, file, line, fn, format, args); |
83684a35 | 57 | } |
cdb454f2 | 58 | #pragma GCC diagnostic pop |
83684a35 | 59 | |
03658d4f | 60 | static int add_modules(const char *p) { |
fabe5c0e LP |
61 | char **t; |
62 | _cleanup_strv_free_ char **k = NULL; | |
03658d4f LP |
63 | |
64 | k = strv_split(p, ","); | |
0d0f0c50 SL |
65 | if (!k) |
66 | return log_oom(); | |
03658d4f LP |
67 | |
68 | t = strv_merge(arg_proc_cmdline_modules, k); | |
0d0f0c50 SL |
69 | if (!t) |
70 | return log_oom(); | |
03658d4f LP |
71 | |
72 | strv_free(arg_proc_cmdline_modules); | |
73 | arg_proc_cmdline_modules = t; | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
78 | static int parse_proc_cmdline(void) { | |
c007bb1b ZJS |
79 | char _cleanup_free_ *line = NULL; |
80 | char *w, *state; | |
03658d4f LP |
81 | int r; |
82 | size_t l; | |
83 | ||
84 | if (detect_container(NULL) > 0) | |
85 | return 0; | |
86 | ||
87 | r = read_one_line_file("/proc/cmdline", &line); | |
88 | if (r < 0) { | |
89 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); | |
90 | return 0; | |
91 | } | |
92 | ||
93 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
c007bb1b | 94 | char _cleanup_free_ *word; |
03658d4f LP |
95 | |
96 | word = strndup(w, l); | |
c007bb1b ZJS |
97 | if (!word) |
98 | return log_oom(); | |
03658d4f | 99 | |
91ac7425 | 100 | if (startswith(word, "modules-load=")) { |
03658d4f | 101 | |
b2fc39a6 | 102 | r = add_modules(word + 13); |
03658d4f | 103 | if (r < 0) |
c007bb1b | 104 | return r; |
03658d4f | 105 | |
91ac7425 | 106 | } else if (startswith(word, "rd.modules-load=")) { |
03658d4f LP |
107 | |
108 | if (in_initrd()) { | |
b2fc39a6 | 109 | r = add_modules(word + 16); |
03658d4f | 110 | if (r < 0) |
c007bb1b | 111 | return r; |
03658d4f LP |
112 | } |
113 | ||
114 | } | |
03658d4f LP |
115 | } |
116 | ||
c007bb1b | 117 | return 0; |
03658d4f LP |
118 | } |
119 | ||
120 | static int load_module(struct kmod_ctx *ctx, const char *m) { | |
27fda47f | 121 | const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST; |
03658d4f LP |
122 | struct kmod_list *itr, *modlist = NULL; |
123 | int r = 0; | |
124 | ||
125 | log_debug("load: %s\n", m); | |
126 | ||
127 | r = kmod_module_new_from_lookup(ctx, m, &modlist); | |
128 | if (r < 0) { | |
129 | log_error("Failed to lookup alias '%s': %s", m, strerror(-r)); | |
130 | return r; | |
131 | } | |
132 | ||
27fda47f MS |
133 | if (!modlist) { |
134 | log_error("Failed to find module '%s'", m); | |
8f9c0b4c | 135 | return -ENOENT; |
27fda47f MS |
136 | } |
137 | ||
03658d4f LP |
138 | kmod_list_foreach(itr, modlist) { |
139 | struct kmod_module *mod; | |
27fda47f | 140 | int state, err; |
03658d4f LP |
141 | |
142 | mod = kmod_module_get_module(itr); | |
27fda47f MS |
143 | state = kmod_module_get_initstate(mod); |
144 | ||
145 | switch (state) { | |
146 | case KMOD_MODULE_BUILTIN: | |
147 | log_info("Module '%s' is builtin", kmod_module_get_name(mod)); | |
148 | break; | |
149 | ||
150 | case KMOD_MODULE_LIVE: | |
b56c267f | 151 | log_debug("Module '%s' is already loaded", kmod_module_get_name(mod)); |
27fda47f MS |
152 | break; |
153 | ||
154 | default: | |
155 | err = kmod_module_probe_insert_module(mod, probe_flags, | |
156 | NULL, NULL, NULL, NULL); | |
157 | ||
158 | if (err == 0) | |
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)); | |
162 | else { | |
163 | log_error("Failed to insert '%s': %s", kmod_module_get_name(mod), | |
164 | strerror(-err)); | |
165 | r = err; | |
166 | } | |
03658d4f LP |
167 | } |
168 | ||
169 | kmod_module_unref(mod); | |
170 | } | |
171 | ||
172 | kmod_module_unref_list(modlist); | |
173 | ||
174 | return r; | |
175 | } | |
176 | ||
fabe5c0e LP |
177 | static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) { |
178 | _cleanup_fclose_ FILE *f = NULL; | |
179 | int r; | |
180 | ||
181 | assert(ctx); | |
182 | assert(path); | |
183 | ||
184 | r = search_and_fopen_nulstr(path, "re", conf_file_dirs, &f); | |
185 | if (r < 0) { | |
186 | if (ignore_enoent && r == -ENOENT) | |
187 | return 0; | |
188 | ||
189 | log_error("Failed to open %s, ignoring: %s", path, strerror(-r)); | |
190 | return r; | |
191 | } | |
192 | ||
193 | log_debug("apply: %s\n", path); | |
194 | for (;;) { | |
195 | char line[LINE_MAX], *l; | |
196 | int k; | |
197 | ||
198 | if (!fgets(line, sizeof(line), f)) { | |
199 | if (feof(f)) | |
200 | break; | |
201 | ||
202 | log_error("Failed to read file '%s', ignoring: %m", path); | |
203 | return -errno; | |
204 | } | |
205 | ||
206 | l = strstrip(line); | |
207 | if (!*l) | |
208 | continue; | |
209 | if (strchr(COMMENTS, *l)) | |
210 | continue; | |
211 | ||
212 | k = load_module(ctx, l); | |
213 | if (k < 0 && r == 0) | |
214 | r = k; | |
215 | } | |
216 | ||
217 | return r; | |
218 | } | |
219 | ||
220 | static int help(void) { | |
221 | ||
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); | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | static int parse_argv(int argc, char *argv[]) { | |
231 | ||
232 | static const struct option options[] = { | |
233 | { "help", no_argument, NULL, 'h' }, | |
234 | { NULL, 0, NULL, 0 } | |
235 | }; | |
236 | ||
237 | int c; | |
238 | ||
239 | assert(argc >= 0); | |
240 | assert(argv); | |
241 | ||
242 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { | |
243 | ||
244 | switch (c) { | |
245 | ||
246 | case 'h': | |
247 | help(); | |
248 | return 0; | |
249 | ||
250 | case '?': | |
251 | return -EINVAL; | |
252 | ||
253 | default: | |
254 | log_error("Unknown option code %c", c); | |
255 | return -EINVAL; | |
256 | } | |
257 | } | |
258 | ||
259 | return 1; | |
260 | } | |
261 | ||
b2423f1f | 262 | int main(int argc, char *argv[]) { |
fabe5c0e | 263 | int r, k; |
83684a35 | 264 | struct kmod_ctx *ctx; |
b2423f1f | 265 | |
fabe5c0e LP |
266 | r = parse_argv(argc, argv); |
267 | if (r <= 0) | |
268 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
b2423f1f | 269 | |
4cfa2c99 | 270 | log_set_target(LOG_TARGET_AUTO); |
b2423f1f LP |
271 | log_parse_environment(); |
272 | log_open(); | |
273 | ||
4c12626c LP |
274 | umask(0022); |
275 | ||
03658d4f LP |
276 | if (parse_proc_cmdline() < 0) |
277 | return EXIT_FAILURE; | |
278 | ||
4e2075ce LP |
279 | ctx = kmod_new(NULL, NULL); |
280 | if (!ctx) { | |
83684a35 | 281 | log_error("Failed to allocate memory for kmod."); |
b2423f1f LP |
282 | goto finish; |
283 | } | |
284 | ||
83684a35 | 285 | kmod_load_resources(ctx); |
83684a35 | 286 | kmod_set_log_fn(ctx, systemd_kmod_log, NULL); |
b2423f1f | 287 | |
fabe5c0e | 288 | r = 0; |
03658d4f | 289 | |
fabe5c0e LP |
290 | if (argc > optind) { |
291 | int i; | |
b2423f1f | 292 | |
fabe5c0e LP |
293 | for (i = optind; i < argc; i++) { |
294 | k = apply_file(ctx, argv[i], false); | |
295 | if (k < 0 && r == 0) | |
296 | r = k; | |
b2423f1f LP |
297 | } |
298 | ||
fabe5c0e LP |
299 | } else { |
300 | _cleanup_free_ char **files = NULL; | |
301 | char **fn, **i; | |
b2423f1f | 302 | |
fabe5c0e LP |
303 | STRV_FOREACH(i, arg_proc_cmdline_modules) { |
304 | k = load_module(ctx, *i); | |
03658d4f | 305 | if (k < 0) |
83684a35 | 306 | r = EXIT_FAILURE; |
b2423f1f LP |
307 | } |
308 | ||
fabe5c0e LP |
309 | r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs); |
310 | if (r < 0) { | |
311 | log_error("Failed to enumerate modules-load.d files: %s", strerror(-r)); | |
312 | goto finish; | |
b2423f1f LP |
313 | } |
314 | ||
fabe5c0e LP |
315 | STRV_FOREACH(fn, files) { |
316 | k = apply_file(ctx, *fn, true); | |
317 | if (k < 0 && r == 0) | |
318 | r = k; | |
319 | } | |
b2423f1f LP |
320 | } |
321 | ||
b2423f1f | 322 | finish: |
83684a35 | 323 | kmod_unref(ctx); |
03658d4f | 324 | strv_free(arg_proc_cmdline_modules); |
b2423f1f | 325 | |
fabe5c0e | 326 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
b2423f1f | 327 | } |