blob: 09e3de6c3783de5acdb5c7f68b6c951e4a6f4da3 [file] [log] [blame]
Eric Andersen0139ca92001-07-22 23:01:03 +00001/* vi: set sw=4 ts=4: */
2/*
Robert Grieblaead70b2002-07-26 15:54:20 +00003 * Modprobe written from scratch for BusyBox
Eric Andersen60e56f52002-04-26 06:04:01 +00004 *
Denis Vlasenkoba1315d2008-09-13 14:59:38 +00005 * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
6 * Copyright (c) 2008 Vladimir Dronnikov
Robert Griebl6859d762002-08-05 02:57:12 +00007 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +02008 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
Denis Vlasenkoba1315d2008-09-13 14:59:38 +00009 */
Denys Vlasenkoe32b64c2016-11-23 07:54:52 +010010//config:config MODPROBE
11//config: bool "modprobe"
Denys Vlasenkoa1cd0d92016-12-23 15:12:27 +010012//config: default y
Denys Vlasenkoe32b64c2016-11-23 07:54:52 +010013//config: select PLATFORM_LINUX
14//config: help
15//config: Handle the loading of modules, and their dependencies on a high
16//config: level.
17//config:
18//config:config FEATURE_MODPROBE_BLACKLIST
19//config: bool "Blacklist support"
Denys Vlasenkoa1cd0d92016-12-23 15:12:27 +010020//config: default y
21//config: depends on MODPROBE && !MODPROBE_SMALL
Denys Vlasenkoe32b64c2016-11-23 07:54:52 +010022//config: select PLATFORM_LINUX
23//config: help
24//config: Say 'y' here to enable support for the 'blacklist' command in
25//config: modprobe.conf. This prevents the alias resolver to resolve
26//config: blacklisted modules. This is useful if you want to prevent your
27//config: hardware autodetection scripts to load modules like evdev, frame
28//config: buffer drivers etc.
Eric Andersen0139ca92001-07-22 23:01:03 +000029
Denys Vlasenkoa1cd0d92016-12-23 15:12:27 +010030//applet:IF_MODPROBE(IF_NOT_MODPROBE_SMALL(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP)))
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +000031
Denys Vlasenkoa1cd0d92016-12-23 15:12:27 +010032//kbuild:ifneq ($(CONFIG_MODPROBE_SMALL),y)
Denys Vlasenkoe32b64c2016-11-23 07:54:52 +010033//kbuild:lib-$(CONFIG_MODPROBE) += modprobe.o modutils.o
Denys Vlasenkoa1cd0d92016-12-23 15:12:27 +010034//kbuild:endif
Denys Vlasenkoe32b64c2016-11-23 07:54:52 +010035
Serj Kalichev85781962010-12-28 04:18:18 +010036#include "libbb.h"
37#include "modutils.h"
38#include <sys/utsname.h>
39#include <fnmatch.h>
40
Denys Vlasenkoe998b082015-01-15 02:48:36 +010041#if 1
Serj Kalichev85781962010-12-28 04:18:18 +010042#define DBG(...) ((void)0)
Denys Vlasenkoe998b082015-01-15 02:48:36 +010043#else
44#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
45#endif
Serj Kalichev85781962010-12-28 04:18:18 +010046
47/* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
48 * we expect the full dependency list to be specified in modules.dep.
49 * Older versions would only export the direct dependency list.
50 */
51
52
Pascal Bellardb82b34e2010-06-07 01:16:45 +020053//usage:#if !ENABLE_MODPROBE_SMALL
54//usage:#define modprobe_notes_usage
55//usage: "modprobe can (un)load a stack of modules, passing each module options (when\n"
56//usage: "loading). modprobe uses a configuration file to determine what option(s) to\n"
57//usage: "pass each module it loads.\n"
58//usage: "\n"
59//usage: "The configuration file is searched (in this order):\n"
60//usage: "\n"
61//usage: " /etc/modprobe.conf (2.6 only)\n"
62//usage: " /etc/modules.conf\n"
63//usage: " /etc/conf.modules (deprecated)\n"
64//usage: "\n"
65//usage: "They all have the same syntax (see below). If none is present, it is\n"
66//usage: "_not_ an error; each loaded module is then expected to load without\n"
67//usage: "options. Once a file is found, the others are tested for.\n"
68//usage: "\n"
69//usage: "/etc/modules.conf entry format:\n"
70//usage: "\n"
71//usage: " alias <alias_name> <mod_name>\n"
72//usage: " Makes it possible to modprobe alias_name, when there is no such module.\n"
73//usage: " It makes sense if your mod_name is long, or you want a more representative\n"
74//usage: " name for that module (eg. 'scsi' in place of 'aha7xxx').\n"
75//usage: " This makes it also possible to use a different set of options (below) for\n"
76//usage: " the module and the alias.\n"
77//usage: " A module can be aliased more than once.\n"
78//usage: "\n"
79//usage: " options <mod_name|alias_name> <symbol=value...>\n"
80//usage: " When loading module mod_name (or the module aliased by alias_name), pass\n"
81//usage: " the \"symbol=value\" pairs as option to that module.\n"
82//usage: "\n"
83//usage: "Sample /etc/modules.conf file:\n"
84//usage: "\n"
85//usage: " options tulip irq=3\n"
86//usage: " alias tulip tulip2\n"
87//usage: " options tulip2 irq=4 io=0x308\n"
88//usage: "\n"
89//usage: "Other functionality offered by 'classic' modprobe is not available in\n"
90//usage: "this implementation.\n"
91//usage: "\n"
92//usage: "If module options are present both in the config file, and on the command line,\n"
93//usage: "then the options from the command line will be passed to the module _after_\n"
94//usage: "the options from the config file. That way, you can have defaults in the config\n"
95//usage: "file, and override them for a specific usage from the command line.\n"
96//usage:#define modprobe_example_usage
97//usage: "(with the above /etc/modules.conf):\n\n"
98//usage: "$ modprobe tulip\n"
99//usage: " will load the module 'tulip' with default option 'irq=3'\n\n"
100//usage: "$ modprobe tulip irq=5\n"
101//usage: " will load the module 'tulip' with option 'irq=5', thus overriding the default\n\n"
102//usage: "$ modprobe tulip2\n"
103//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308',\n"
104//usage: " which are the default for alias 'tulip2'\n\n"
105//usage: "$ modprobe tulip2 irq=8\n"
106//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=8',\n"
107//usage: " which are the default for alias 'tulip2' overridden by the option 'irq=8'\n\n"
108//usage: " from the command line\n\n"
109//usage: "$ modprobe tulip2 irq=2 io=0x210\n"
110//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=4 io=0x210',\n"
111//usage: " which are the default for alias 'tulip2' overridden by the options 'irq=2 io=0x210'\n\n"
112//usage: " from the command line\n"
113//usage:
114//usage:#define modprobe_trivial_usage
Serj Kalichev85781962010-12-28 04:18:18 +0100115//usage: "[-alrqvsD" IF_FEATURE_MODPROBE_BLACKLIST("b") "]"
Denys Vlasenko5fd3ddf2014-04-19 15:04:39 +0200116//usage: " MODULE [SYMBOL=VALUE]..."
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200117//usage:#define modprobe_full_usage "\n\n"
Denys Vlasenko66426762011-06-05 03:58:28 +0200118//usage: " -a Load multiple MODULEs"
Serj Kalichev85781962010-12-28 04:18:18 +0100119//usage: "\n -l List (MODULE is a pattern)"
120//usage: "\n -r Remove MODULE (stacks) or do autoclean"
121//usage: "\n -q Quiet"
122//usage: "\n -v Verbose"
123//usage: "\n -s Log to syslog"
124//usage: "\n -D Show dependencies"
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200125//usage: IF_FEATURE_MODPROBE_BLACKLIST(
Serj Kalichev85781962010-12-28 04:18:18 +0100126//usage: "\n -b Apply blacklist to module names too"
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200127//usage: )
128//usage:#endif /* !ENABLE_MODPROBE_SMALL */
129
Felipe Contreras428bd2d2012-01-31 14:55:15 +0100130/* Note: usage text doesn't document various 2.4 options
131 * we pull in through INSMOD_OPTS define
132 * Note2: -b is always accepted, but if !FEATURE_MODPROBE_BLACKLIST,
133 * it is a no-op.
134 */
135#define MODPROBE_OPTS "alrDb"
Serj Kalichev85781962010-12-28 04:18:18 +0100136/* -a and -D _are_ in fact compatible */
137#define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--arD:r--alD:a--lr:D--rl")
Felipe Contreras428bd2d2012-01-31 14:55:15 +0100138//#define MODPROBE_OPTS "acd:lnrt:C:b"
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100139//#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200140enum {
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100141 OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
142 //OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << x), /* c */
143 //OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
144 OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
145 //OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << x), /* n */
146 OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
147 //OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
148 //OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
Serj Kalichev85781962010-12-28 04:18:18 +0100149 //OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << x), /* C */
150 OPT_SHOW_DEPS = (INSMOD_OPT_UNUSED << 3), /* D */
151 OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 4) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200152};
Serj Kalichev85781962010-12-28 04:18:18 +0100153#if ENABLE_LONG_OPTS
154static const char modprobe_longopts[] ALIGN1 =
155 /* nobody asked for long opts (yet) */
156 // "all\0" No_argument "a"
157 // "list\0" No_argument "l"
158 // "remove\0" No_argument "r"
159 // "quiet\0" No_argument "q"
160 // "verbose\0" No_argument "v"
161 // "syslog\0" No_argument "s"
162 /* module-init-tools 3.11.1 has only long opt --show-depends
163 * but no short -D, we provide long opt for scripts which
164 * were written for 3.11.1: */
Felipe Contreras428bd2d2012-01-31 14:55:15 +0100165 "show-depends\0" No_argument "D"
Serj Kalichev85781962010-12-28 04:18:18 +0100166 // "use-blacklist\0" No_argument "b"
Serj Kalichev85781962010-12-28 04:18:18 +0100167 ;
168#endif
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200169
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200170#define MODULE_FLAG_LOADED 0x0001
171#define MODULE_FLAG_NEED_DEPS 0x0002
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000172/* "was seen in modules.dep": */
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200173#define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
174#define MODULE_FLAG_BLACKLISTED 0x0008
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000175
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000176struct globals {
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000177 llist_t *probes; /* MEs of module(s) requested on cmdline */
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000178 char *cmdline_mopts; /* module options from cmdline */
179 int num_unresolved_deps;
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000180 /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
181 smallint need_symbols;
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100182 struct utsname uts;
Timo Teräs48dc80b2015-11-05 18:54:55 +0100183 module_db db;
Denys Vlasenko98a4c7c2010-02-04 15:00:15 +0100184} FIX_ALIASING;
Timo Terase12e0ac2011-06-20 09:38:13 +0200185#define G (*ptr_to_globals)
186#define INIT_G() do { \
Denys Vlasenko982e87f2013-07-30 11:52:58 +0200187 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
Timo Terase12e0ac2011-06-20 09:38:13 +0200188} while (0)
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000189
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000190
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000191static int read_config(const char *path);
192
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000193static char *gather_options_str(char *opts, const char *append)
194{
195 /* Speed-optimized. We call gather_options_str many times. */
Denys Vlasenkoda879ec2010-01-26 08:17:45 +0100196 if (append) {
197 if (opts == NULL) {
198 opts = xstrdup(append);
199 } else {
200 int optlen = strlen(opts);
201 opts = xrealloc(opts, optlen + strlen(append) + 2);
202 sprintf(opts + optlen, " %s", append);
203 }
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000204 }
205 return opts;
206}
207
Timo Teräs48dc80b2015-11-05 18:54:55 +0100208static struct module_entry *get_or_add_modentry(const char *module)
Denis Vlasenkof45c4f42008-06-16 04:09:25 +0000209{
Timo Teräs48dc80b2015-11-05 18:54:55 +0100210 return moddb_get_or_create(&G.db, module);
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000211}
212
213static void add_probe(const char *name)
214{
215 struct module_entry *m;
216
217 m = get_or_add_modentry(name);
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100218 if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
Denys Vlasenko140def82009-05-26 12:48:34 +0200219 && (m->flags & MODULE_FLAG_LOADED)
220 ) {
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000221 DBG("skipping %s, it is already loaded", name);
222 return;
223 }
224
Mike Frysinger00ffaea2009-05-05 20:13:45 -0400225 DBG("queuing %s", name);
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000226 m->probed_name = name;
227 m->flags |= MODULE_FLAG_NEED_DEPS;
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000228 llist_add_to_end(&G.probes, m);
229 G.num_unresolved_deps++;
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000230 if (ENABLE_FEATURE_MODUTILS_SYMBOLS
Denys Vlasenko8dff01d2015-03-12 17:48:34 +0100231 && is_prefixed_with(m->modname, "symbol:")
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000232 ) {
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000233 G.need_symbols = 1;
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000234 }
Denis Vlasenko9ddc8d52008-05-18 14:39:43 +0000235}
236
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000237static int FAST_FUNC config_file_action(const char *filename,
238 struct stat *statbuf UNUSED_PARAM,
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000239 void *userdata UNUSED_PARAM,
Denys Vlasenko20dd4992016-03-29 19:23:55 +0200240 int depth)
Rob Landley72615752006-04-10 16:09:52 +0000241{
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000242 char *tokens[3];
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000243 parser_t *p;
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200244 struct module_entry *m;
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000245 int rc = TRUE;
Mike Frysinger3a5cc982016-02-12 23:26:51 -0500246 const char *base, *ext;
Denis Vlasenkoe1ee48e2008-07-29 00:19:44 +0000247
Denys Vlasenko20dd4992016-03-29 19:23:55 +0200248 /* Skip files that begin with a "." */
Mike Frysinger3a5cc982016-02-12 23:26:51 -0500249 base = bb_basename(filename);
250 if (base[0] == '.')
251 goto error;
252
Denys Vlasenko20dd4992016-03-29 19:23:55 +0200253 /* In dir recursion, skip files that do not end with a ".conf"
254 * depth==0: read_config("modules.{symbols,alias}") must work,
255 * "include FILE_NOT_ENDING_IN_CONF" must work too.
256 */
257 if (depth != 0) {
258 ext = strrchr(base, '.');
259 if (ext == NULL || strcmp(ext + 1, "conf"))
260 goto error;
261 }
Denis Vlasenkoe1ee48e2008-07-29 00:19:44 +0000262
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000263 p = config_open2(filename, fopen_for_read);
264 if (p == NULL) {
265 rc = FALSE;
266 goto error;
267 }
Rob Landley72615752006-04-10 16:09:52 +0000268
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000269 while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000270//Use index_in_strings?
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000271 if (strcmp(tokens[0], "alias") == 0) {
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000272 /* alias <wildcard> <modulename> */
273 llist_t *l;
274 char wildcard[MODULE_NAME_LEN];
275 char *rmod;
276
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000277 if (tokens[2] == NULL)
278 continue;
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000279 filename2modname(tokens[1], wildcard);
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000280
Timo Terase12e0ac2011-06-20 09:38:13 +0200281 for (l = G.probes; l; l = l->link) {
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000282 m = (struct module_entry *) l->data;
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000283 if (fnmatch(wildcard, m->modname, 0) != 0)
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000284 continue;
285 rmod = filename2modname(tokens[2], NULL);
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000286 llist_add_to(&m->realnames, rmod);
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000287
288 if (m->flags & MODULE_FLAG_NEED_DEPS) {
289 m->flags &= ~MODULE_FLAG_NEED_DEPS;
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000290 G.num_unresolved_deps--;
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000291 }
292
293 m = get_or_add_modentry(rmod);
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000294 if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
295 m->flags |= MODULE_FLAG_NEED_DEPS;
296 G.num_unresolved_deps++;
297 }
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000298 }
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000299 } else if (strcmp(tokens[0], "options") == 0) {
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000300 /* options <modulename> <option...> */
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000301 if (tokens[2] == NULL)
302 continue;
303 m = get_or_add_modentry(tokens[1]);
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000304 m->options = gather_options_str(m->options, tokens[2]);
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000305 } else if (strcmp(tokens[0], "include") == 0) {
Denys Vlasenko20dd4992016-03-29 19:23:55 +0200306 /* include <filename>/<dirname> (yes, directories also must work) */
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000307 read_config(tokens[1]);
308 } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
309 && strcmp(tokens[0], "blacklist") == 0
310 ) {
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000311 /* blacklist <modulename> */
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000312 get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
Rob Landley72615752006-04-10 16:09:52 +0000313 }
Rob Landleye9190962005-12-12 19:38:44 +0000314 }
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000315 config_close(p);
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200316 error:
Robert Griebl52e8d062002-05-14 23:42:08 +0000317 return rc;
318}
319
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000320static int read_config(const char *path)
Robert Griebl52e8d062002-05-14 23:42:08 +0000321{
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000322 return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
Denys Vlasenko20dd4992016-03-29 19:23:55 +0200323 config_file_action, NULL, NULL,
324 /*depth:*/ 0);
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000325}
Eric Andersen3b1a7442003-12-24 20:30:45 +0000326
Denys Vlasenko7eaf58d2009-06-17 20:33:50 +0200327static const char *humanly_readable_name(struct module_entry *m)
328{
329 /* probed_name may be NULL. modname always exists. */
330 return m->probed_name ? m->probed_name : m->modname;
331}
332
Peter Korsgaard87529732015-09-09 14:55:07 +0200333/* Like strsep(&stringp, "\n\t ") but quoted text goes to single token
334 * even if it contains whitespace.
335 */
336static char *strsep_quotes(char **stringp)
337{
338 char *s, *start = *stringp;
339
340 if (!start)
341 return NULL;
342
343 for (s = start; ; s++) {
344 switch (*s) {
345 case '"':
346 s = strchrnul(s + 1, '"'); /* find trailing quote */
347 if (*s != '\0')
348 s++; /* skip trailing quote */
349 /* fall through */
350 case '\0':
351 case '\n':
352 case '\t':
353 case ' ':
354 if (*s != '\0') {
355 *s = '\0';
356 *stringp = s + 1;
357 } else {
358 *stringp = NULL;
359 }
360 return start;
361 }
362 }
363}
364
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100365static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
366{
Denys Vlasenko197202d2010-03-03 04:20:33 +0100367 char *kcmdline_buf;
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100368 char *kcmdline;
369 char *kptr;
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100370
Denys Vlasenko197202d2010-03-03 04:20:33 +0100371 kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
372 if (!kcmdline_buf)
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100373 return options;
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100374
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100375 kcmdline = kcmdline_buf;
Peter Korsgaard87529732015-09-09 14:55:07 +0200376 while ((kptr = strsep_quotes(&kcmdline)) != NULL) {
Denys Vlasenko8dff01d2015-03-12 17:48:34 +0100377 char *after_modulename = is_prefixed_with(kptr, modulename);
378 if (!after_modulename || *after_modulename != '.')
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100379 continue;
380 /* It is "modulename.xxxx" */
Denys Vlasenko8dff01d2015-03-12 17:48:34 +0100381 kptr = after_modulename + 1;
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100382 if (strchr(kptr, '=') != NULL) {
383 /* It is "modulename.opt=[val]" */
384 options = gather_options_str(options, kptr);
385 }
386 }
Denys Vlasenko197202d2010-03-03 04:20:33 +0100387 free(kcmdline_buf);
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100388
389 return options;
390}
391
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200392/* Return: similar to bb_init_module:
393 * 0 on success,
394 * -errno on open/read error,
395 * errno on init_module() error
396 */
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200397/* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
398 * not deleted ones (those are still listed in modules.dep).
399 * module-init-tools version 3.4:
400 * # modprobe bogus
401 * FATAL: Module bogus not found. [exitcode 1]
402 * # modprobe -q bogus [silent, exitcode still 1]
403 * but:
404 * # rm kernel/drivers/net/dummy.ko
405 * # modprobe -q dummy
406 * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
407 * [exitcode 1]
408 */
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000409static int do_modprobe(struct module_entry *m)
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000410{
Denys Vlasenkof3cbfc02009-05-28 03:54:29 +0200411 int rc, first;
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000412
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000413 if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200414 if (!(option_mask32 & INSMOD_OPT_SILENT))
Denys Vlasenko7eaf58d2009-06-17 20:33:50 +0200415 bb_error_msg("module %s not found in modules.dep",
416 humanly_readable_name(m));
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000417 return -ENOENT;
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000418 }
419 DBG("do_modprob'ing %s", m->modname);
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000420
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100421 if (!(option_mask32 & OPT_REMOVE))
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000422 m->deps = llist_rev(m->deps);
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000423
Timo Terase12e0ac2011-06-20 09:38:13 +0200424 if (0) {
425 llist_t *l;
426 for (l = m->deps; l; l = l->link)
427 DBG("dep: %s", l->data);
428 }
Mike Frysinger00ffaea2009-05-05 20:13:45 -0400429
Denys Vlasenkof3cbfc02009-05-28 03:54:29 +0200430 first = 1;
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000431 rc = 0;
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200432 while (m->deps) {
Serj Kalichev85781962010-12-28 04:18:18 +0100433 struct module_entry *m2;
434 char *fn, *options;
435
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200436 rc = 0;
437 fn = llist_pop(&m->deps); /* we leak it */
Natanael Copa9de69c02015-01-16 13:53:05 +0100438 m2 = get_or_add_modentry(bb_get_last_path_component_nostrip(fn));
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200439
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100440 if (option_mask32 & OPT_REMOVE) {
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200441 /* modprobe -r */
Denys Vlasenkof3cbfc02009-05-28 03:54:29 +0200442 if (m2->flags & MODULE_FLAG_LOADED) {
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200443 rc = bb_delete_module(m2->modname, O_EXCL);
444 if (rc) {
445 if (first) {
Denys Vlasenko941e7a42015-10-24 04:19:56 +0200446 bb_perror_msg("can't unload module '%s'",
Denys Vlasenkocd139742015-10-24 04:17:04 +0200447 humanly_readable_name(m2));
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200448 break;
449 }
Denys Vlasenkof3cbfc02009-05-28 03:54:29 +0200450 } else {
451 m2->flags &= ~MODULE_FLAG_LOADED;
452 }
453 }
454 /* do not error out if *deps* fail to unload */
455 first = 0;
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200456 continue;
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000457 }
458
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200459 options = m2->options;
460 m2->options = NULL;
Denys Vlasenko3e26d4f2010-02-27 23:15:22 +0100461 options = parse_and_add_kcmdline_module_options(options, m2->modname);
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200462 if (m == m2)
463 options = gather_options_str(options, G.cmdline_mopts);
Serj Kalichev85781962010-12-28 04:18:18 +0100464
465 if (option_mask32 & OPT_SHOW_DEPS) {
466 printf(options ? "insmod %s/%s/%s %s\n"
467 : "insmod %s/%s/%s\n",
468 CONFIG_DEFAULT_MODULES_DIR, G.uts.release, fn,
469 options);
470 free(options);
471 continue;
472 }
473
474 if (m2->flags & MODULE_FLAG_LOADED) {
475 DBG("%s is already loaded, skipping", fn);
476 free(options);
477 continue;
478 }
479
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200480 rc = bb_init_module(fn, options);
481 DBG("loaded %s '%s', rc:%d", fn, options, rc);
Denys Vlasenko725b5a32010-01-10 04:52:45 +0100482 if (rc == EEXIST)
483 rc = 0;
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200484 free(options);
485 if (rc) {
Denys Vlasenko651a2692010-03-23 16:25:17 +0100486 bb_error_msg("can't load module %s (%s): %s",
Denys Vlasenko7eaf58d2009-06-17 20:33:50 +0200487 humanly_readable_name(m2),
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200488 fn,
489 moderror(rc)
490 );
491 break;
492 }
493 m2->flags |= MODULE_FLAG_LOADED;
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000494 }
Denis Vlasenko9604e1b2009-03-03 18:47:56 +0000495
Eric Andersen908e3622003-06-20 09:56:37 +0000496 return rc;
Robert Griebl52e8d062002-05-14 23:42:08 +0000497}
498
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000499static void load_modules_dep(void)
500{
501 struct module_entry *m;
502 char *colon, *tokens[2];
503 parser_t *p;
504
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200505 /* Modprobe does not work at all without modules.dep,
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000506 * even if the full module name is given. Returning error here
507 * was making us later confuse user with this message:
508 * "module /full/path/to/existing/file/module.ko not found".
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000509 * It's better to die immediately, with good message.
510 * xfopen_for_read provides that. */
511 p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000512
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000513 while (G.num_unresolved_deps
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000514 && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
515 ) {
516 colon = last_char_is(tokens[0], ':');
517 if (colon == NULL)
518 continue;
Denys Vlasenko76b22622015-01-15 03:04:23 +0100519 *colon = '\0';
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000520
Timo Teräs48dc80b2015-11-05 18:54:55 +0100521 m = moddb_get(&G.db, bb_get_last_path_component_nostrip(tokens[0]));
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000522 if (m == NULL)
523 continue;
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000524
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000525 /* Optimization... */
526 if ((m->flags & MODULE_FLAG_LOADED)
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100527 && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000528 ) {
529 DBG("skip deps of %s, it's already loaded", tokens[0]);
530 continue;
531 }
532
533 m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000534 if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000535 G.num_unresolved_deps--;
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000536 llist_add_to(&m->deps, xstrdup(tokens[0]));
537 if (tokens[1])
Denys Vlasenko5da42fc2009-08-14 02:10:54 +0200538 string_to_llist(tokens[1], &m->deps, " \t");
Mike Frysinger00ffaea2009-05-05 20:13:45 -0400539 } else
540 DBG("skipping dep line");
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000541 }
542 config_close(p);
543}
544
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +0000545int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denis Vlasenko9ddc0042008-08-06 00:51:43 +0000546int modprobe_main(int argc UNUSED_PARAM, char **argv)
Eric Andersen0139ca92001-07-22 23:01:03 +0000547{
Denis Vlasenkobb26db42008-10-31 02:04:28 +0000548 int rc;
549 unsigned opt;
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000550 struct module_entry *me;
Eric Andersen0139ca92001-07-22 23:01:03 +0000551
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100552 INIT_G();
553
554 IF_LONG_OPTS(applet_long_options = modprobe_longopts;)
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200555 opt_complementary = MODPROBE_COMPLEMENTARY;
556 opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
Denis Vlasenko9ddc0042008-08-06 00:51:43 +0000557 argv += optind;
Denis Vlasenkob68979a2007-11-02 23:31:10 +0000558
Lauri Kasanena48a29f2010-07-08 11:22:30 +0300559 /* Goto modules location */
560 xchdir(CONFIG_DEFAULT_MODULES_DIR);
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100561 uname(&G.uts);
562 xchdir(G.uts.release);
Lauri Kasanena48a29f2010-07-08 11:22:30 +0300563
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100564 if (opt & OPT_LIST_ONLY) {
Denys Vlasenko5dad4ae2011-02-15 02:17:31 +0100565 int i;
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200566 char *colon, *tokens[2];
567 parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
568
Denys Vlasenko5dad4ae2011-02-15 02:17:31 +0100569 for (i = 0; argv[i]; i++)
570 replace(argv[i], '-', '_');
571
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200572 while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
573 colon = last_char_is(tokens[0], ':');
574 if (!colon)
575 continue;
576 *colon = '\0';
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200577 if (!argv[0])
578 puts(tokens[0]);
579 else {
Denys Vlasenkoe998b082015-01-15 02:48:36 +0100580 char name[MODULE_NAME_LEN];
581 filename2modname(
582 bb_get_last_path_component_nostrip(tokens[0]),
583 name
584 );
Pascal Bellardb82b34e2010-06-07 01:16:45 +0200585 for (i = 0; argv[i]; i++) {
586 if (fnmatch(argv[i], name, 0) == 0) {
587 puts(tokens[0]);
588 }
589 }
590 }
591 }
592 return EXIT_SUCCESS;
593 }
594
595 /* Yes, for some reason -l ignores -s... */
596 if (opt & INSMOD_OPT_SYSLOG)
597 logmode = LOGMODE_SYSLOG;
Robert Griebl236abbf2002-05-22 23:34:35 +0000598
Denis Vlasenkobb26db42008-10-31 02:04:28 +0000599 if (!argv[0]) {
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100600 if (opt & OPT_REMOVE) {
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000601 /* "modprobe -r" (w/o params).
602 * "If name is NULL, all unused modules marked
603 * autoclean will be removed".
604 */
Denys Vlasenkoab19ede2009-11-11 21:05:42 +0100605 if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
Denys Vlasenkocd139742015-10-24 04:17:04 +0200606 bb_perror_nomsg_and_die();
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000607 }
Denis Vlasenkobb26db42008-10-31 02:04:28 +0000608 return EXIT_SUCCESS;
609 }
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000610
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000611 /* Retrieve module names of already loaded modules */
Denis Vlasenkobb26db42008-10-31 02:04:28 +0000612 {
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000613 char *s;
Denis Vlasenkobb26db42008-10-31 02:04:28 +0000614 parser_t *parser = config_open2("/proc/modules", fopen_for_read);
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000615 while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000616 get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000617 config_close(parser);
618 }
Eric Andersen3b1a7442003-12-24 20:30:45 +0000619
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100620 if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) {
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000621 /* Each argument is a module name */
622 do {
Mike Frysinger00ffaea2009-05-05 20:13:45 -0400623 DBG("adding module %s", *argv);
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000624 add_probe(*argv++);
625 } while (*argv);
626 } else {
627 /* First argument is module name, rest are parameters */
Mike Frysinger00ffaea2009-05-05 20:13:45 -0400628 DBG("probing just module %s", *argv);
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000629 add_probe(argv[0]);
Denys Vlasenkoc5830bd2011-02-02 00:00:36 +0100630 G.cmdline_mopts = parse_cmdline_module_options(argv, /*quote_spaces:*/ 1);
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000631 }
632
633 /* Happens if all requested modules are already loaded */
634 if (G.probes == NULL)
635 return EXIT_SUCCESS;
636
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000637 read_config("/etc/modprobe.conf");
638 read_config("/etc/modprobe.d");
639 if (ENABLE_FEATURE_MODUTILS_SYMBOLS && G.need_symbols)
640 read_config("modules.symbols");
641 load_modules_dep();
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000642 if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000643 read_config("modules.alias");
644 load_modules_dep();
645 }
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000646
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200647 rc = 0;
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000648 while ((me = llist_pop(&G.probes)) != NULL) {
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000649 if (me->realnames == NULL) {
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200650 DBG("probing by module name");
Denis Vlasenkoa6b6f052009-03-06 22:48:11 +0000651 /* This is not an alias. Literal names are blacklisted
652 * only if '-b' is given.
653 */
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100654 if (!(opt & OPT_BLACKLIST)
Denis Vlasenko0e2f3622009-03-05 16:32:27 +0000655 || !(me->flags & MODULE_FLAG_BLACKLISTED)
656 ) {
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200657 rc |= do_modprobe(me);
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000658 }
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200659 continue;
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000660 }
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200661
662 /* Probe all real names for the alias */
663 do {
664 char *realname = llist_pop(&me->realnames);
665 struct module_entry *m2;
666
667 DBG("probing alias %s by realname %s", me->modname, realname);
668 m2 = get_or_add_modentry(realname);
669 if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
670 && (!(m2->flags & MODULE_FLAG_LOADED)
Serj Kalicheve4e911e2010-12-26 01:56:19 +0100671 || (opt & (OPT_REMOVE | OPT_SHOW_DEPS)))
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200672 ) {
673//TODO: we can pass "me" as 2nd param to do_modprobe,
674//and make do_modprobe emit more meaningful error messages
675//with alias name included, not just module name alias resolves to.
676 rc |= do_modprobe(m2);
677 }
678 free(realname);
679 } while (me->realnames != NULL);
Denis Vlasenkoba1315d2008-09-13 14:59:38 +0000680 }
681
Timo Teräs48dc80b2015-11-05 18:54:55 +0100682 if (ENABLE_FEATURE_CLEAN_UP)
683 moddb_free(&G.db);
684
Denys Vlasenkoee47f6e2009-06-17 18:46:06 +0200685 return (rc != 0);
Eric Andersen0139ca92001-07-22 23:01:03 +0000686}