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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//config:config MODPROBE
11//config: bool "modprobe"
12//config: default y
13//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"
20//config: default y
21//config: depends on MODPROBE && !MODPROBE_SMALL
22//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.
29
30//applet:IF_MODPROBE(IF_NOT_MODPROBE_SMALL(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP)))
31
32//kbuild:ifneq ($(CONFIG_MODPROBE_SMALL),y)
33//kbuild:lib-$(CONFIG_MODPROBE) += modprobe.o modutils.o
34//kbuild:endif
35
36#include "libbb.h"
37#include "modutils.h"
38#include <sys/utsname.h>
39#include <fnmatch.h>
40
41#if 1
42#define DBG(...) ((void)0)
43#else
44#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
45#endif
46
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
53//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
115//usage: "[-alrqvsD" IF_FEATURE_MODPROBE_BLACKLIST("b") "]"
116//usage: " MODULE [SYMBOL=VALUE]..."
117//usage:#define modprobe_full_usage "\n\n"
118//usage: " -a Load multiple MODULEs"
119//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"
125//usage: IF_FEATURE_MODPROBE_BLACKLIST(
126//usage: "\n -b Apply blacklist to module names too"
127//usage: )
128//usage:#endif /* !ENABLE_MODPROBE_SMALL */
129
130/* 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"
136/* -a and -D _are_ in fact compatible */
137#define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--arD:r--alD:a--lr:D--rl")
138//#define MODPROBE_OPTS "acd:lnrt:C:b"
139//#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
140enum {
141 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 */
149 //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,
152};
153#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: */
165 "show-depends\0" No_argument "D"
166 // "use-blacklist\0" No_argument "b"
167 ;
168#endif
169
170#define MODULE_FLAG_LOADED 0x0001
171#define MODULE_FLAG_NEED_DEPS 0x0002
172/* "was seen in modules.dep": */
173#define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
174#define MODULE_FLAG_BLACKLISTED 0x0008
175
176struct globals {
177 llist_t *probes; /* MEs of module(s) requested on cmdline */
178 char *cmdline_mopts; /* module options from cmdline */
179 int num_unresolved_deps;
180 /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
181 smallint need_symbols;
182 struct utsname uts;
183 module_db db;
184} FIX_ALIASING;
185#define G (*ptr_to_globals)
186#define INIT_G() do { \
187 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
188} while (0)
189
190
191static int read_config(const char *path);
192
193static char *gather_options_str(char *opts, const char *append)
194{
195 /* Speed-optimized. We call gather_options_str many times. */
196 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 }
204 }
205 return opts;
206}
207
208static struct module_entry *get_or_add_modentry(const char *module)
209{
210 return moddb_get_or_create(&G.db, module);
211}
212
213static void add_probe(const char *name)
214{
215 struct module_entry *m;
216
217 m = get_or_add_modentry(name);
218 if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
219 && (m->flags & MODULE_FLAG_LOADED)
220 ) {
221 DBG("skipping %s, it is already loaded", name);
222 return;
223 }
224
225 DBG("queuing %s", name);
226 m->probed_name = name;
227 m->flags |= MODULE_FLAG_NEED_DEPS;
228 llist_add_to_end(&G.probes, m);
229 G.num_unresolved_deps++;
230 if (ENABLE_FEATURE_MODUTILS_SYMBOLS
231 && is_prefixed_with(m->modname, "symbol:")
232 ) {
233 G.need_symbols = 1;
234 }
235}
236
237static int FAST_FUNC config_file_action(const char *filename,
238 struct stat *statbuf UNUSED_PARAM,
239 void *userdata UNUSED_PARAM,
240 int depth)
241{
242 char *tokens[3];
243 parser_t *p;
244 struct module_entry *m;
245 int rc = TRUE;
246 const char *base, *ext;
247
248 /* Skip files that begin with a "." */
249 base = bb_basename(filename);
250 if (base[0] == '.')
251 goto error;
252
253 /* 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 }
262
263 p = config_open2(filename, fopen_for_read);
264 if (p == NULL) {
265 rc = FALSE;
266 goto error;
267 }
268
269 while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
270//Use index_in_strings?
271 if (strcmp(tokens[0], "alias") == 0) {
272 /* alias <wildcard> <modulename> */
273 llist_t *l;
274 char wildcard[MODULE_NAME_LEN];
275 char *rmod;
276
277 if (tokens[2] == NULL)
278 continue;
279 filename2modname(tokens[1], wildcard);
280
281 for (l = G.probes; l; l = l->link) {
282 m = (struct module_entry *) l->data;
283 if (fnmatch(wildcard, m->modname, 0) != 0)
284 continue;
285 rmod = filename2modname(tokens[2], NULL);
286 llist_add_to(&m->realnames, rmod);
287
288 if (m->flags & MODULE_FLAG_NEED_DEPS) {
289 m->flags &= ~MODULE_FLAG_NEED_DEPS;
290 G.num_unresolved_deps--;
291 }
292
293 m = get_or_add_modentry(rmod);
294 if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
295 m->flags |= MODULE_FLAG_NEED_DEPS;
296 G.num_unresolved_deps++;
297 }
298 }
299 } else if (strcmp(tokens[0], "options") == 0) {
300 /* options <modulename> <option...> */
301 if (tokens[2] == NULL)
302 continue;
303 m = get_or_add_modentry(tokens[1]);
304 m->options = gather_options_str(m->options, tokens[2]);
305 } else if (strcmp(tokens[0], "include") == 0) {
306 /* include <filename>/<dirname> (yes, directories also must work) */
307 read_config(tokens[1]);
308 } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
309 && strcmp(tokens[0], "blacklist") == 0
310 ) {
311 /* blacklist <modulename> */
312 get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
313 }
314 }
315 config_close(p);
316 error:
317 return rc;
318}
319
320static int read_config(const char *path)
321{
322 return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
323 config_file_action, NULL, NULL,
324 /*depth:*/ 0);
325}
326
327static 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
333/* 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
365static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
366{
367 char *kcmdline_buf;
368 char *kcmdline;
369 char *kptr;
370
371 kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
372 if (!kcmdline_buf)
373 return options;
374
375 kcmdline = kcmdline_buf;
376 while ((kptr = strsep_quotes(&kcmdline)) != NULL) {
377 char *after_modulename = is_prefixed_with(kptr, modulename);
378 if (!after_modulename || *after_modulename != '.')
379 continue;
380 /* It is "modulename.xxxx" */
381 kptr = after_modulename + 1;
382 if (strchr(kptr, '=') != NULL) {
383 /* It is "modulename.opt=[val]" */
384 options = gather_options_str(options, kptr);
385 }
386 }
387 free(kcmdline_buf);
388
389 return options;
390}
391
392/* Return: similar to bb_init_module:
393 * 0 on success,
394 * -errno on open/read error,
395 * errno on init_module() error
396 */
397/* 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 */
409static int do_modprobe(struct module_entry *m)
410{
411 int rc, first;
412
413 if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
414 if (!(option_mask32 & INSMOD_OPT_SILENT))
415 bb_error_msg("module %s not found in modules.dep",
416 humanly_readable_name(m));
417 return -ENOENT;
418 }
419 DBG("do_modprob'ing %s", m->modname);
420
421 if (!(option_mask32 & OPT_REMOVE))
422 m->deps = llist_rev(m->deps);
423
424 if (0) {
425 llist_t *l;
426 for (l = m->deps; l; l = l->link)
427 DBG("dep: %s", l->data);
428 }
429
430 first = 1;
431 rc = 0;
432 while (m->deps) {
433 struct module_entry *m2;
434 char *fn, *options;
435
436 rc = 0;
437 fn = llist_pop(&m->deps); /* we leak it */
438 m2 = get_or_add_modentry(bb_get_last_path_component_nostrip(fn));
439
440 if (option_mask32 & OPT_REMOVE) {
441 /* modprobe -r */
442 if (m2->flags & MODULE_FLAG_LOADED) {
443 rc = bb_delete_module(m2->modname, O_EXCL);
444 if (rc) {
445 if (first) {
446 bb_perror_msg("can't unload module '%s'",
447 humanly_readable_name(m2));
448 break;
449 }
450 } else {
451 m2->flags &= ~MODULE_FLAG_LOADED;
452 }
453 }
454 /* do not error out if *deps* fail to unload */
455 first = 0;
456 continue;
457 }
458
459 options = m2->options;
460 m2->options = NULL;
461 options = parse_and_add_kcmdline_module_options(options, m2->modname);
462 if (m == m2)
463 options = gather_options_str(options, G.cmdline_mopts);
464
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
480 rc = bb_init_module(fn, options);
481 DBG("loaded %s '%s', rc:%d", fn, options, rc);
482 if (rc == EEXIST)
483 rc = 0;
484 free(options);
485 if (rc) {
486 bb_error_msg("can't load module %s (%s): %s",
487 humanly_readable_name(m2),
488 fn,
489 moderror(rc)
490 );
491 break;
492 }
493 m2->flags |= MODULE_FLAG_LOADED;
494 }
495
496 return rc;
497}
498
499static void load_modules_dep(void)
500{
501 struct module_entry *m;
502 char *colon, *tokens[2];
503 parser_t *p;
504
505 /* Modprobe does not work at all without modules.dep,
506 * 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".
509 * 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);
512
513 while (G.num_unresolved_deps
514 && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
515 ) {
516 colon = last_char_is(tokens[0], ':');
517 if (colon == NULL)
518 continue;
519 *colon = '\0';
520
521 m = moddb_get(&G.db, bb_get_last_path_component_nostrip(tokens[0]));
522 if (m == NULL)
523 continue;
524
525 /* Optimization... */
526 if ((m->flags & MODULE_FLAG_LOADED)
527 && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
528 ) {
529 DBG("skip deps of %s, it's already loaded", tokens[0]);
530 continue;
531 }
532
533 m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
534 if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
535 G.num_unresolved_deps--;
536 llist_add_to(&m->deps, xstrdup(tokens[0]));
537 if (tokens[1])
538 string_to_llist(tokens[1], &m->deps, " \t");
539 } else
540 DBG("skipping dep line");
541 }
542 config_close(p);
543}
544
545int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
546int modprobe_main(int argc UNUSED_PARAM, char **argv)
547{
548 int rc;
549 unsigned opt;
550 struct module_entry *me;
551
552 INIT_G();
553
554 IF_LONG_OPTS(applet_long_options = modprobe_longopts;)
555 opt_complementary = MODPROBE_COMPLEMENTARY;
556 opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
557 argv += optind;
558
559 /* Goto modules location */
560 xchdir(CONFIG_DEFAULT_MODULES_DIR);
561 uname(&G.uts);
562 xchdir(G.uts.release);
563
564 if (opt & OPT_LIST_ONLY) {
565 int i;
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 if (!argv[0])
578 puts(tokens[0]);
579 else {
580 char name[MODULE_NAME_LEN];
581 filename2modname(
582 bb_get_last_path_component_nostrip(tokens[0]),
583 name
584 );
585 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;
598
599 if (!argv[0]) {
600 if (opt & OPT_REMOVE) {
601 /* "modprobe -r" (w/o params).
602 * "If name is NULL, all unused modules marked
603 * autoclean will be removed".
604 */
605 if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
606 bb_perror_nomsg_and_die();
607 }
608 return EXIT_SUCCESS;
609 }
610
611 /* Retrieve module names of already loaded modules */
612 {
613 char *s;
614 parser_t *parser = config_open2("/proc/modules", fopen_for_read);
615 while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
616 get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
617 config_close(parser);
618 }
619
620 if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) {
621 /* Each argument is a module name */
622 do {
623 DBG("adding module %s", *argv);
624 add_probe(*argv++);
625 } while (*argv);
626 } else {
627 /* First argument is module name, rest are parameters */
628 DBG("probing just module %s", *argv);
629 add_probe(argv[0]);
630 G.cmdline_mopts = parse_cmdline_module_options(argv, /*quote_spaces:*/ 1);
631 }
632
633 /* Happens if all requested modules are already loaded */
634 if (G.probes == NULL)
635 return EXIT_SUCCESS;
636
637 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();
642 if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
643 read_config("modules.alias");
644 load_modules_dep();
645 }
646
647 rc = 0;
648 while ((me = llist_pop(&G.probes)) != NULL) {
649 if (me->realnames == NULL) {
650 DBG("probing by module name");
651 /* This is not an alias. Literal names are blacklisted
652 * only if '-b' is given.
653 */
654 if (!(opt & OPT_BLACKLIST)
655 || !(me->flags & MODULE_FLAG_BLACKLISTED)
656 ) {
657 rc |= do_modprobe(me);
658 }
659 continue;
660 }
661
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)
671 || (opt & (OPT_REMOVE | OPT_SHOW_DEPS)))
672 ) {
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);
680 }
681
682 if (ENABLE_FEATURE_CLEAN_UP)
683 moddb_free(&G.db);
684
685 return (rc != 0);
686}
687
generated by cgit at 2024-05-14 05:17:06 (GMT)