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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" |
a5c32cff | 36 | #include "fileio.h" |
eb9da376 | 37 | #include "build.h" |
03658d4f LP |
38 | |
39 | static char **arg_proc_cmdline_modules = NULL; | |
b2423f1f | 40 | |
7f0a55d4 | 41 | static const char conf_file_dirs[] = CONF_DIRS_NULSTR("modules-load"); |
fabe5c0e | 42 | |
83684a35 | 43 | static void systemd_kmod_log(void *data, int priority, const char *file, int line, |
f168c273 | 44 | const char *fn, const char *format, va_list args) { |
bcfce235 LP |
45 | |
46 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
79008bdd | 47 | log_internalv(priority, 0, file, line, fn, format, args); |
bcfce235 | 48 | REENABLE_WARNING; |
83684a35 TG |
49 | } |
50 | ||
03658d4f | 51 | static int add_modules(const char *p) { |
fabe5c0e | 52 | _cleanup_strv_free_ char **k = NULL; |
03658d4f LP |
53 | |
54 | k = strv_split(p, ","); | |
0d0f0c50 SL |
55 | if (!k) |
56 | return log_oom(); | |
03658d4f | 57 | |
e3e45d4f | 58 | if (strv_extend_strv(&arg_proc_cmdline_modules, k) < 0) |
0d0f0c50 | 59 | return log_oom(); |
03658d4f | 60 | |
03658d4f LP |
61 | return 0; |
62 | } | |
63 | ||
059cb385 | 64 | static int parse_proc_cmdline_item(const char *key, const char *value) { |
74df0fca | 65 | int r; |
03658d4f | 66 | |
059cb385 LP |
67 | if (STR_IN_SET(key, "modules-load", "rd.modules-load") && value) { |
68 | r = add_modules(value); | |
141a79f4 ZJS |
69 | if (r < 0) |
70 | return r; | |
03658d4f LP |
71 | } |
72 | ||
c007bb1b | 73 | return 0; |
03658d4f LP |
74 | } |
75 | ||
76 | static int load_module(struct kmod_ctx *ctx, const char *m) { | |
27fda47f | 77 | const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST; |
03658d4f LP |
78 | struct kmod_list *itr, *modlist = NULL; |
79 | int r = 0; | |
80 | ||
9f6445e3 | 81 | log_debug("load: %s", m); |
03658d4f LP |
82 | |
83 | r = kmod_module_new_from_lookup(ctx, m, &modlist); | |
84 | if (r < 0) { | |
85 | log_error("Failed to lookup alias '%s': %s", m, strerror(-r)); | |
86 | return r; | |
87 | } | |
88 | ||
27fda47f MS |
89 | if (!modlist) { |
90 | log_error("Failed to find module '%s'", m); | |
8f9c0b4c | 91 | return -ENOENT; |
27fda47f MS |
92 | } |
93 | ||
03658d4f LP |
94 | kmod_list_foreach(itr, modlist) { |
95 | struct kmod_module *mod; | |
27fda47f | 96 | int state, err; |
03658d4f LP |
97 | |
98 | mod = kmod_module_get_module(itr); | |
27fda47f MS |
99 | state = kmod_module_get_initstate(mod); |
100 | ||
101 | switch (state) { | |
102 | case KMOD_MODULE_BUILTIN: | |
103 | log_info("Module '%s' is builtin", kmod_module_get_name(mod)); | |
104 | break; | |
105 | ||
106 | case KMOD_MODULE_LIVE: | |
b56c267f | 107 | log_debug("Module '%s' is already loaded", kmod_module_get_name(mod)); |
27fda47f MS |
108 | break; |
109 | ||
110 | default: | |
111 | err = kmod_module_probe_insert_module(mod, probe_flags, | |
112 | NULL, NULL, NULL, NULL); | |
113 | ||
114 | if (err == 0) | |
115 | log_info("Inserted module '%s'", kmod_module_get_name(mod)); | |
116 | else if (err == KMOD_PROBE_APPLY_BLACKLIST) | |
117 | log_info("Module '%s' is blacklisted", kmod_module_get_name(mod)); | |
118 | else { | |
119 | log_error("Failed to insert '%s': %s", kmod_module_get_name(mod), | |
120 | strerror(-err)); | |
121 | r = err; | |
122 | } | |
03658d4f LP |
123 | } |
124 | ||
125 | kmod_module_unref(mod); | |
126 | } | |
127 | ||
128 | kmod_module_unref_list(modlist); | |
129 | ||
130 | return r; | |
131 | } | |
132 | ||
fabe5c0e LP |
133 | static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) { |
134 | _cleanup_fclose_ FILE *f = NULL; | |
135 | int r; | |
136 | ||
137 | assert(ctx); | |
138 | assert(path); | |
139 | ||
4cf7ea55 | 140 | r = search_and_fopen_nulstr(path, "re", NULL, conf_file_dirs, &f); |
fabe5c0e LP |
141 | if (r < 0) { |
142 | if (ignore_enoent && r == -ENOENT) | |
143 | return 0; | |
144 | ||
145 | log_error("Failed to open %s, ignoring: %s", path, strerror(-r)); | |
146 | return r; | |
147 | } | |
148 | ||
9f6445e3 | 149 | log_debug("apply: %s", path); |
fabe5c0e LP |
150 | for (;;) { |
151 | char line[LINE_MAX], *l; | |
152 | int k; | |
153 | ||
154 | if (!fgets(line, sizeof(line), f)) { | |
155 | if (feof(f)) | |
156 | break; | |
157 | ||
158 | log_error("Failed to read file '%s', ignoring: %m", path); | |
159 | return -errno; | |
160 | } | |
161 | ||
162 | l = strstrip(line); | |
163 | if (!*l) | |
164 | continue; | |
d3b6d0c2 | 165 | if (strchr(COMMENTS "\n", *l)) |
fabe5c0e LP |
166 | continue; |
167 | ||
168 | k = load_module(ctx, l); | |
169 | if (k < 0 && r == 0) | |
170 | r = k; | |
171 | } | |
172 | ||
173 | return r; | |
174 | } | |
175 | ||
601185b4 | 176 | static void help(void) { |
fabe5c0e LP |
177 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" |
178 | "Loads statically configured kernel modules.\n\n" | |
eb9da376 LP |
179 | " -h --help Show this help\n" |
180 | " --version Show package version\n", | |
fabe5c0e | 181 | program_invocation_short_name); |
fabe5c0e LP |
182 | } |
183 | ||
184 | static int parse_argv(int argc, char *argv[]) { | |
185 | ||
eb9da376 LP |
186 | enum { |
187 | ARG_VERSION = 0x100, | |
188 | }; | |
189 | ||
fabe5c0e LP |
190 | static const struct option options[] = { |
191 | { "help", no_argument, NULL, 'h' }, | |
eb9da376 LP |
192 | { "version", no_argument, NULL, ARG_VERSION }, |
193 | {} | |
fabe5c0e LP |
194 | }; |
195 | ||
196 | int c; | |
197 | ||
198 | assert(argc >= 0); | |
199 | assert(argv); | |
200 | ||
601185b4 | 201 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
fabe5c0e LP |
202 | |
203 | switch (c) { | |
204 | ||
205 | case 'h': | |
601185b4 ZJS |
206 | help(); |
207 | return 0; | |
eb9da376 LP |
208 | |
209 | case ARG_VERSION: | |
210 | puts(PACKAGE_STRING); | |
211 | puts(SYSTEMD_FEATURES); | |
fabe5c0e LP |
212 | return 0; |
213 | ||
214 | case '?': | |
215 | return -EINVAL; | |
216 | ||
217 | default: | |
eb9da376 | 218 | assert_not_reached("Unhandled option"); |
fabe5c0e | 219 | } |
fabe5c0e LP |
220 | |
221 | return 1; | |
222 | } | |
223 | ||
b2423f1f | 224 | int main(int argc, char *argv[]) { |
fabe5c0e | 225 | int r, k; |
83684a35 | 226 | struct kmod_ctx *ctx; |
b2423f1f | 227 | |
fabe5c0e LP |
228 | r = parse_argv(argc, argv); |
229 | if (r <= 0) | |
230 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
b2423f1f | 231 | |
4cfa2c99 | 232 | log_set_target(LOG_TARGET_AUTO); |
b2423f1f LP |
233 | log_parse_environment(); |
234 | log_open(); | |
235 | ||
4c12626c LP |
236 | umask(0022); |
237 | ||
b5884878 LP |
238 | r = parse_proc_cmdline(parse_proc_cmdline_item); |
239 | if (r < 0) | |
240 | log_warning("Failed to parse kernel command line, ignoring: %s", strerror(-r)); | |
03658d4f | 241 | |
4e2075ce LP |
242 | ctx = kmod_new(NULL, NULL); |
243 | if (!ctx) { | |
83684a35 | 244 | log_error("Failed to allocate memory for kmod."); |
b2423f1f LP |
245 | goto finish; |
246 | } | |
247 | ||
83684a35 | 248 | kmod_load_resources(ctx); |
83684a35 | 249 | kmod_set_log_fn(ctx, systemd_kmod_log, NULL); |
b2423f1f | 250 | |
fabe5c0e | 251 | r = 0; |
03658d4f | 252 | |
fabe5c0e LP |
253 | if (argc > optind) { |
254 | int i; | |
b2423f1f | 255 | |
fabe5c0e LP |
256 | for (i = optind; i < argc; i++) { |
257 | k = apply_file(ctx, argv[i], false); | |
258 | if (k < 0 && r == 0) | |
259 | r = k; | |
b2423f1f LP |
260 | } |
261 | ||
fabe5c0e LP |
262 | } else { |
263 | _cleanup_free_ char **files = NULL; | |
264 | char **fn, **i; | |
b2423f1f | 265 | |
fabe5c0e LP |
266 | STRV_FOREACH(i, arg_proc_cmdline_modules) { |
267 | k = load_module(ctx, *i); | |
b857193b LP |
268 | if (k < 0 && r == 0) |
269 | r = k; | |
b2423f1f LP |
270 | } |
271 | ||
4b462d1a LP |
272 | k = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs); |
273 | if (k < 0) { | |
274 | log_error("Failed to enumerate modules-load.d files: %s", strerror(-k)); | |
275 | if (r == 0) | |
276 | r = k; | |
fabe5c0e | 277 | goto finish; |
b2423f1f LP |
278 | } |
279 | ||
fabe5c0e LP |
280 | STRV_FOREACH(fn, files) { |
281 | k = apply_file(ctx, *fn, true); | |
282 | if (k < 0 && r == 0) | |
283 | r = k; | |
284 | } | |
b2423f1f LP |
285 | } |
286 | ||
b2423f1f | 287 | finish: |
83684a35 | 288 | kmod_unref(ctx); |
03658d4f | 289 | strv_free(arg_proc_cmdline_modules); |
b2423f1f | 290 | |
fabe5c0e | 291 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
b2423f1f | 292 | } |