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path: root/modutils/modprobe.c (plain)
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1/* vi: set sw=4 ts=4: */
2/*
3 * Modprobe written from scratch for BusyBox
4 *
5 * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
6 * Copyright (c) 2008 Vladimir Dronnikov
7 *
8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
9 */
10
11//applet:IF_MODPROBE(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP))
12
13#include "libbb.h"
14#include "modutils.h"
15#include <sys/utsname.h>
16#include <fnmatch.h>
17
18//#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
19#define DBG(...) ((void)0)
20
21/* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
22 * we expect the full dependency list to be specified in modules.dep.
23 * Older versions would only export the direct dependency list.
24 */
25
26
27//usage:#if !ENABLE_MODPROBE_SMALL && !ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
28//usage:#define modprobe_notes_usage
29//usage: "modprobe can (un)load a stack of modules, passing each module options (when\n"
30//usage: "loading). modprobe uses a configuration file to determine what option(s) to\n"
31//usage: "pass each module it loads.\n"
32//usage: "\n"
33//usage: "The configuration file is searched (in this order):\n"
34//usage: "\n"
35//usage: " /etc/modprobe.conf (2.6 only)\n"
36//usage: " /etc/modules.conf\n"
37//usage: " /etc/conf.modules (deprecated)\n"
38//usage: "\n"
39//usage: "They all have the same syntax (see below). If none is present, it is\n"
40//usage: "_not_ an error; each loaded module is then expected to load without\n"
41//usage: "options. Once a file is found, the others are tested for.\n"
42//usage: "\n"
43//usage: "/etc/modules.conf entry format:\n"
44//usage: "\n"
45//usage: " alias <alias_name> <mod_name>\n"
46//usage: " Makes it possible to modprobe alias_name, when there is no such module.\n"
47//usage: " It makes sense if your mod_name is long, or you want a more representative\n"
48//usage: " name for that module (eg. 'scsi' in place of 'aha7xxx').\n"
49//usage: " This makes it also possible to use a different set of options (below) for\n"
50//usage: " the module and the alias.\n"
51//usage: " A module can be aliased more than once.\n"
52//usage: "\n"
53//usage: " options <mod_name|alias_name> <symbol=value...>\n"
54//usage: " When loading module mod_name (or the module aliased by alias_name), pass\n"
55//usage: " the \"symbol=value\" pairs as option to that module.\n"
56//usage: "\n"
57//usage: "Sample /etc/modules.conf file:\n"
58//usage: "\n"
59//usage: " options tulip irq=3\n"
60//usage: " alias tulip tulip2\n"
61//usage: " options tulip2 irq=4 io=0x308\n"
62//usage: "\n"
63//usage: "Other functionality offered by 'classic' modprobe is not available in\n"
64//usage: "this implementation.\n"
65//usage: "\n"
66//usage: "If module options are present both in the config file, and on the command line,\n"
67//usage: "then the options from the command line will be passed to the module _after_\n"
68//usage: "the options from the config file. That way, you can have defaults in the config\n"
69//usage: "file, and override them for a specific usage from the command line.\n"
70//usage:#define modprobe_example_usage
71//usage: "(with the above /etc/modules.conf):\n\n"
72//usage: "$ modprobe tulip\n"
73//usage: " will load the module 'tulip' with default option 'irq=3'\n\n"
74//usage: "$ modprobe tulip irq=5\n"
75//usage: " will load the module 'tulip' with option 'irq=5', thus overriding the default\n\n"
76//usage: "$ modprobe tulip2\n"
77//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308',\n"
78//usage: " which are the default for alias 'tulip2'\n\n"
79//usage: "$ modprobe tulip2 irq=8\n"
80//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=8',\n"
81//usage: " which are the default for alias 'tulip2' overridden by the option 'irq=8'\n\n"
82//usage: " from the command line\n\n"
83//usage: "$ modprobe tulip2 irq=2 io=0x210\n"
84//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=4 io=0x210',\n"
85//usage: " which are the default for alias 'tulip2' overridden by the options 'irq=2 io=0x210'\n\n"
86//usage: " from the command line\n"
87//usage:
88//usage:#define modprobe_trivial_usage
89//usage: "[-alrqvsD" IF_FEATURE_MODPROBE_BLACKLIST("b") "]"
90//usage: " MODULE [symbol=value]..."
91//usage:#define modprobe_full_usage "\n\n"
92//usage: " -a Load multiple MODULEs"
93//usage: "\n -l List (MODULE is a pattern)"
94//usage: "\n -r Remove MODULE (stacks) or do autoclean"
95//usage: "\n -q Quiet"
96//usage: "\n -v Verbose"
97//usage: "\n -s Log to syslog"
98//usage: "\n -D Show dependencies"
99//usage: IF_FEATURE_MODPROBE_BLACKLIST(
100//usage: "\n -b Apply blacklist to module names too"
101//usage: )
102//usage:#endif /* !ENABLE_MODPROBE_SMALL */
103
104/* Note: usage text doesn't document various 2.4 options
105 * we pull in through INSMOD_OPTS define
106 * Note2: -b is always accepted, but if !FEATURE_MODPROBE_BLACKLIST,
107 * it is a no-op.
108 */
109#define MODPROBE_OPTS "alrDb"
110/* -a and -D _are_ in fact compatible */
111#define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--arD:r--alD:a--lr:D--rl")
112//#define MODPROBE_OPTS "acd:lnrt:C:b"
113//#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
114enum {
115 OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
116 //OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << x), /* c */
117 //OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
118 OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
119 //OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << x), /* n */
120 OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
121 //OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
122 //OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
123 //OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << x), /* C */
124 OPT_SHOW_DEPS = (INSMOD_OPT_UNUSED << 3), /* D */
125 OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 4) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
126};
127#if ENABLE_LONG_OPTS
128static const char modprobe_longopts[] ALIGN1 =
129 /* nobody asked for long opts (yet) */
130 // "all\0" No_argument "a"
131 // "list\0" No_argument "l"
132 // "remove\0" No_argument "r"
133 // "quiet\0" No_argument "q"
134 // "verbose\0" No_argument "v"
135 // "syslog\0" No_argument "s"
136 /* module-init-tools 3.11.1 has only long opt --show-depends
137 * but no short -D, we provide long opt for scripts which
138 * were written for 3.11.1: */
139 "show-depends\0" No_argument "D"
140 // "use-blacklist\0" No_argument "b"
141 ;
142#endif
143
144#define MODULE_FLAG_LOADED 0x0001
145#define MODULE_FLAG_NEED_DEPS 0x0002
146/* "was seen in modules.dep": */
147#define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
148#define MODULE_FLAG_BLACKLISTED 0x0008
149
150#if defined(ANDROID) || defined(__ANDROID__)
151#define DONT_USE_UTS_REL_FOLDER
152#endif
153
154struct module_entry { /* I'll call it ME. */
155 unsigned flags;
156 char *modname; /* stripped of /path/, .ext and s/-/_/g */
157 const char *probed_name; /* verbatim as seen on cmdline */
158 char *options; /* options from config files */
159 llist_t *realnames; /* strings. if this module is an alias, */
160 /* real module name is one of these. */
161//Can there really be more than one? Example from real kernel?
162 llist_t *deps; /* strings. modules we depend on */
163};
164
165#define DB_HASH_SIZE 256
166
167struct globals {
168 llist_t *probes; /* MEs of module(s) requested on cmdline */
169 char *cmdline_mopts; /* module options from cmdline */
170 int num_unresolved_deps;
171 /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
172 smallint need_symbols;
173 struct utsname uts;
174 llist_t *db[DB_HASH_SIZE]; /* MEs of all modules ever seen (caching for speed) */
175} FIX_ALIASING;
176#define G (*ptr_to_globals)
177#define INIT_G() do { \
178 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
179} while (0)
180
181
182static int read_config(const char *path);
183
184static char *gather_options_str(char *opts, const char *append)
185{
186 /* Speed-optimized. We call gather_options_str many times. */
187 if (append) {
188 if (opts == NULL) {
189 opts = xstrdup(append);
190 } else {
191 int optlen = strlen(opts);
192 opts = xrealloc(opts, optlen + strlen(append) + 2);
193 sprintf(opts + optlen, " %s", append);
194 }
195 }
196 return opts;
197}
198
199/* These three functions called many times, optimizing for speed.
200 * Users reported minute-long delays when they runn iptables repeatedly
201 * (iptables use modprobe to install needed kernel modules).
202 */
203static struct module_entry *helper_get_module(const char *module, int create)
204{
205 char modname[MODULE_NAME_LEN];
206 struct module_entry *e;
207 llist_t *l;
208 unsigned i;
209 unsigned hash;
210
211 filename2modname(module, modname);
212
213 hash = 0;
214 for (i = 0; modname[i]; i++)
215 hash = ((hash << 5) + hash) + modname[i];
216 hash %= DB_HASH_SIZE;
217
218 for (l = G.db[hash]; l; l = l->link) {
219 e = (struct module_entry *) l->data;
220 if (strcmp(e->modname, modname) == 0)
221 return e;
222 }
223 if (!create)
224 return NULL;
225
226 e = xzalloc(sizeof(*e));
227 e->modname = xstrdup(modname);
228 llist_add_to(&G.db[hash], e);
229
230 return e;
231}
232static ALWAYS_INLINE struct module_entry *get_or_add_modentry(const char *module)
233{
234 return helper_get_module(module, 1);
235}
236static ALWAYS_INLINE struct module_entry *get_modentry(const char *module)
237{
238 return helper_get_module(module, 0);
239}
240
241static void add_probe(const char *name)
242{
243 struct module_entry *m;
244
245 m = get_or_add_modentry(name);
246 if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
247 && (m->flags & MODULE_FLAG_LOADED)
248 ) {
249 DBG("skipping %s, it is already loaded", name);
250 return;
251 }
252
253 DBG("queuing %s", name);
254 m->probed_name = name;
255 m->flags |= MODULE_FLAG_NEED_DEPS;
256 llist_add_to_end(&G.probes, m);
257 G.num_unresolved_deps++;
258 if (ENABLE_FEATURE_MODUTILS_SYMBOLS
259 && strncmp(m->modname, "symbol:", 7) == 0
260 ) {
261 G.need_symbols = 1;
262 }
263}
264
265static int FAST_FUNC config_file_action(const char *filename,
266 struct stat *statbuf UNUSED_PARAM,
267 void *userdata UNUSED_PARAM,
268 int depth UNUSED_PARAM)
269{
270 char *tokens[3];
271 parser_t *p;
272 struct module_entry *m;
273 int rc = TRUE;
274
275 if (bb_basename(filename)[0] == '.')
276 goto error;
277
278 p = config_open2(filename, fopen_for_read);
279 if (p == NULL) {
280 rc = FALSE;
281 goto error;
282 }
283
284 while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
285//Use index_in_strings?
286 if (strcmp(tokens[0], "alias") == 0) {
287 /* alias <wildcard> <modulename> */
288 llist_t *l;
289 char wildcard[MODULE_NAME_LEN];
290 char *rmod;
291
292 if (tokens[2] == NULL)
293 continue;
294 filename2modname(tokens[1], wildcard);
295
296 for (l = G.probes; l; l = l->link) {
297 m = (struct module_entry *) l->data;
298 if (fnmatch(wildcard, m->modname, 0) != 0)
299 continue;
300 rmod = filename2modname(tokens[2], NULL);
301 llist_add_to(&m->realnames, rmod);
302
303 if (m->flags & MODULE_FLAG_NEED_DEPS) {
304 m->flags &= ~MODULE_FLAG_NEED_DEPS;
305 G.num_unresolved_deps--;
306 }
307
308 m = get_or_add_modentry(rmod);
309 if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
310 m->flags |= MODULE_FLAG_NEED_DEPS;
311 G.num_unresolved_deps++;
312 }
313 }
314 } else if (strcmp(tokens[0], "options") == 0) {
315 /* options <modulename> <option...> */
316 if (tokens[2] == NULL)
317 continue;
318 m = get_or_add_modentry(tokens[1]);
319 m->options = gather_options_str(m->options, tokens[2]);
320 } else if (strcmp(tokens[0], "include") == 0) {
321 /* include <filename> */
322 read_config(tokens[1]);
323 } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
324 && strcmp(tokens[0], "blacklist") == 0
325 ) {
326 /* blacklist <modulename> */
327 get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
328 }
329 }
330 config_close(p);
331 error:
332 return rc;
333}
334
335static int read_config(const char *path)
336{
337 return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
338 config_file_action, NULL, NULL, 1);
339}
340
341static const char *humanly_readable_name(struct module_entry *m)
342{
343 /* probed_name may be NULL. modname always exists. */
344 return m->probed_name ? m->probed_name : m->modname;
345}
346
347static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
348{
349 char *kcmdline_buf;
350 char *kcmdline;
351 char *kptr;
352 int len;
353
354 kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
355 if (!kcmdline_buf)
356 return options;
357
358 kcmdline = kcmdline_buf;
359 len = strlen(modulename);
360 while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) {
361 if (strncmp(modulename, kptr, len) != 0)
362 continue;
363 kptr += len;
364 if (*kptr != '.')
365 continue;
366 /* It is "modulename.xxxx" */
367 kptr++;
368 if (strchr(kptr, '=') != NULL) {
369 /* It is "modulename.opt=[val]" */
370 options = gather_options_str(options, kptr);
371 }
372 }
373 free(kcmdline_buf);
374
375 return options;
376}
377
378/* Return: similar to bb_init_module:
379 * 0 on success,
380 * -errno on open/read error,
381 * errno on init_module() error
382 */
383/* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
384 * not deleted ones (those are still listed in modules.dep).
385 * module-init-tools version 3.4:
386 * # modprobe bogus
387 * FATAL: Module bogus not found. [exitcode 1]
388 * # modprobe -q bogus [silent, exitcode still 1]
389 * but:
390 * # rm kernel/drivers/net/dummy.ko
391 * # modprobe -q dummy
392 * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
393 * [exitcode 1]
394 */
395static int do_modprobe(struct module_entry *m)
396{
397 int rc, first;
398
399 if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
400 if (!(option_mask32 & INSMOD_OPT_SILENT))
401 bb_error_msg("module %s not found in modules.dep",
402 humanly_readable_name(m));
403 return -ENOENT;
404 }
405 DBG("do_modprob'ing %s", m->modname);
406
407 if (!(option_mask32 & OPT_REMOVE))
408 m->deps = llist_rev(m->deps);
409
410 if (0) {
411 llist_t *l;
412 for (l = m->deps; l; l = l->link)
413 DBG("dep: %s", l->data);
414 }
415
416 first = 1;
417 rc = 0;
418 while (m->deps) {
419 struct module_entry *m2;
420 char *fn, *options;
421
422 rc = 0;
423 fn = llist_pop(&m->deps); /* we leak it */
424 m2 = get_or_add_modentry(fn);
425
426 if (option_mask32 & OPT_REMOVE) {
427 /* modprobe -r */
428 if (m2->flags & MODULE_FLAG_LOADED) {
429 rc = bb_delete_module(m2->modname, O_EXCL);
430 if (rc) {
431 if (first) {
432 bb_error_msg("can't unload module %s: %s",
433 humanly_readable_name(m2),
434 moderror(rc));
435 break;
436 }
437 } else {
438 m2->flags &= ~MODULE_FLAG_LOADED;
439 }
440 }
441 /* do not error out if *deps* fail to unload */
442 first = 0;
443 continue;
444 }
445
446 options = m2->options;
447 m2->options = NULL;
448 options = parse_and_add_kcmdline_module_options(options, m2->modname);
449 if (m == m2)
450 options = gather_options_str(options, G.cmdline_mopts);
451
452 if (option_mask32 & OPT_SHOW_DEPS) {
453#ifndef DONT_USE_UTS_REL_FOLDER
454 printf(options ? "insmod %s/%s/%s %s\n"
455 : "insmod %s/%s/%s\n",
456 CONFIG_DEFAULT_MODULES_DIR, G.uts.release, fn,
457 options);
458#else
459 printf(options ? "insmod %s/%s %s\n"
460 : "insmod %s/%s\n",
461 CONFIG_DEFAULT_MODULES_DIR, fn,
462 options);
463#endif
464 free(options);
465 continue;
466 }
467
468 if (m2->flags & MODULE_FLAG_LOADED) {
469 DBG("%s is already loaded, skipping", fn);
470 free(options);
471 continue;
472 }
473
474 rc = bb_init_module(fn, options);
475 DBG("loaded %s '%s', rc:%d", fn, options, rc);
476 if (rc == EEXIST)
477 rc = 0;
478 free(options);
479 if (rc) {
480 bb_error_msg("can't load module %s (%s): %s",
481 humanly_readable_name(m2),
482 fn,
483 moderror(rc)
484 );
485 break;
486 }
487 m2->flags |= MODULE_FLAG_LOADED;
488 }
489
490 return rc;
491}
492
493static void load_modules_dep(void)
494{
495 struct module_entry *m;
496 char *colon, *tokens[2];
497 parser_t *p;
498
499 /* Modprobe does not work at all without modules.dep,
500 * even if the full module name is given. Returning error here
501 * was making us later confuse user with this message:
502 * "module /full/path/to/existing/file/module.ko not found".
503 * It's better to die immediately, with good message.
504 * xfopen_for_read provides that. */
505 p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
506
507 while (G.num_unresolved_deps
508 && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
509 ) {
510 colon = last_char_is(tokens[0], ':');
511 if (colon == NULL)
512 continue;
513 *colon = 0;
514
515 m = get_modentry(tokens[0]);
516 if (m == NULL)
517 continue;
518
519 /* Optimization... */
520 if ((m->flags & MODULE_FLAG_LOADED)
521 && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
522 ) {
523 DBG("skip deps of %s, it's already loaded", tokens[0]);
524 continue;
525 }
526
527 m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
528 if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
529 G.num_unresolved_deps--;
530 llist_add_to(&m->deps, xstrdup(tokens[0]));
531 if (tokens[1])
532 string_to_llist(tokens[1], &m->deps, " \t");
533 } else
534 DBG("skipping dep line");
535 }
536 config_close(p);
537}
538
539int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
540int modprobe_main(int argc UNUSED_PARAM, char **argv)
541{
542 int rc;
543 unsigned opt;
544 struct module_entry *me;
545 struct stat info;
546
547 INIT_G();
548
549 IF_LONG_OPTS(applet_long_options = modprobe_longopts;)
550 opt_complementary = MODPROBE_COMPLEMENTARY;
551 opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
552 argv += optind;
553
554 /* Goto modules location */
555 xchdir(CONFIG_DEFAULT_MODULES_DIR);
556#ifndef DONT_USE_UTS_REL_FOLDER
557 uname(&G.uts);
558 if (stat(G.uts.release, &info) == 0) {
559 xchdir(G.uts.release);
560 }
561#endif
562
563 if (opt & OPT_LIST_ONLY) {
564 int i;
565 char name[MODULE_NAME_LEN];
566 char *colon, *tokens[2];
567 parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
568
569 for (i = 0; argv[i]; i++)
570 replace(argv[i], '-', '_');
571
572 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';
577 filename2modname(tokens[0], name);
578 if (!argv[0])
579 puts(tokens[0]);
580 else {
581 for (i = 0; argv[i]; i++) {
582 if (fnmatch(argv[i], name, 0) == 0) {
583 puts(tokens[0]);
584 }
585 }
586 }
587 }
588 return EXIT_SUCCESS;
589 }
590
591 /* Yes, for some reason -l ignores -s... */
592 if (opt & INSMOD_OPT_SYSLOG)
593 logmode = LOGMODE_SYSLOG;
594
595 if (!argv[0]) {
596 if (opt & OPT_REMOVE) {
597 /* "modprobe -r" (w/o params).
598 * "If name is NULL, all unused modules marked
599 * autoclean will be removed".
600 */
601 if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
602 bb_perror_msg_and_die("rmmod");
603 }
604 return EXIT_SUCCESS;
605 }
606
607 /* Goto modules location */
608 xchdir(CONFIG_DEFAULT_MODULES_DIR);
609#ifndef DONT_USE_UTS_REL_FOLDER
610 uname(&G.uts);
611 if (stat(G.uts.release, &info) == 0) {
612 xchdir(G.uts.release);
613 }
614#endif
615
616 /* Retrieve module names of already loaded modules */
617 {
618 char *s;
619 parser_t *parser = config_open2("/proc/modules", fopen_for_read);
620 while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
621 get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
622 config_close(parser);
623 }
624
625 if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) {
626 /* Each argument is a module name */
627 do {
628 DBG("adding module %s", *argv);
629 add_probe(*argv++);
630 } while (*argv);
631 } else {
632 /* First argument is module name, rest are parameters */
633 DBG("probing just module %s", *argv);
634 add_probe(argv[0]);
635 G.cmdline_mopts = parse_cmdline_module_options(argv, /*quote_spaces:*/ 1);
636 }
637
638 /* Happens if all requested modules are already loaded */
639 if (G.probes == NULL)
640 return EXIT_SUCCESS;
641
642 read_config("/etc/modprobe.conf");
643 read_config("/etc/modprobe.d");
644 if (ENABLE_FEATURE_MODUTILS_SYMBOLS && G.need_symbols)
645 read_config("modules.symbols");
646 load_modules_dep();
647 if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
648 read_config("modules.alias");
649 load_modules_dep();
650 }
651
652 rc = 0;
653 while ((me = llist_pop(&G.probes)) != NULL) {
654 if (me->realnames == NULL) {
655 DBG("probing by module name");
656 /* This is not an alias. Literal names are blacklisted
657 * only if '-b' is given.
658 */
659 if (!(opt & OPT_BLACKLIST)
660 || !(me->flags & MODULE_FLAG_BLACKLISTED)
661 ) {
662 rc |= do_modprobe(me);
663 }
664 continue;
665 }
666
667 /* Probe all real names for the alias */
668 do {
669 char *realname = llist_pop(&me->realnames);
670 struct module_entry *m2;
671
672 DBG("probing alias %s by realname %s", me->modname, realname);
673 m2 = get_or_add_modentry(realname);
674 if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
675 && (!(m2->flags & MODULE_FLAG_LOADED)
676 || (opt & (OPT_REMOVE | OPT_SHOW_DEPS)))
677 ) {
678//TODO: we can pass "me" as 2nd param to do_modprobe,
679//and make do_modprobe emit more meaningful error messages
680//with alias name included, not just module name alias resolves to.
681 rc |= do_modprobe(m2);
682 }
683 free(realname);
684 } while (me->realnames != NULL);
685 }
686
687 return (rc != 0);
688}
689
generated by cgit at 2024-05-15 16:14:48 (GMT)