source: MondoRescue/branches/3.2/mindi-busybox/modutils/modprobe.c

Last change on this file was 3232, checked in by Bruno Cornec, 10 years ago
  • Update mindi-busybox to 1.21.1
File size: 19.2 KB
Line 
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
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
150struct module_entry { /* I'll call it ME. */
151 unsigned flags;
152 char *modname; /* stripped of /path/, .ext and s/-/_/g */
153 const char *probed_name; /* verbatim as seen on cmdline */
154 char *options; /* options from config files */
155 llist_t *realnames; /* strings. if this module is an alias, */
156 /* real module name is one of these. */
157//Can there really be more than one? Example from real kernel?
158 llist_t *deps; /* strings. modules we depend on */
159};
160
161#define DB_HASH_SIZE 256
162
163struct globals {
164 llist_t *probes; /* MEs of module(s) requested on cmdline */
165 char *cmdline_mopts; /* module options from cmdline */
166 int num_unresolved_deps;
167 /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
168 smallint need_symbols;
169 struct utsname uts;
170 llist_t *db[DB_HASH_SIZE]; /* MEs of all modules ever seen (caching for speed) */
171} FIX_ALIASING;
172#define G (*ptr_to_globals)
173#define INIT_G() do { \
174 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
175} while (0)
176
177
178static int read_config(const char *path);
179
180static char *gather_options_str(char *opts, const char *append)
181{
182 /* Speed-optimized. We call gather_options_str many times. */
183 if (append) {
184 if (opts == NULL) {
185 opts = xstrdup(append);
186 } else {
187 int optlen = strlen(opts);
188 opts = xrealloc(opts, optlen + strlen(append) + 2);
189 sprintf(opts + optlen, " %s", append);
190 }
191 }
192 return opts;
193}
194
195/* These three functions called many times, optimizing for speed.
196 * Users reported minute-long delays when they runn iptables repeatedly
197 * (iptables use modprobe to install needed kernel modules).
198 */
199static struct module_entry *helper_get_module(const char *module, int create)
200{
201 char modname[MODULE_NAME_LEN];
202 struct module_entry *e;
203 llist_t *l;
204 unsigned i;
205 unsigned hash;
206
207 filename2modname(module, modname);
208
209 hash = 0;
210 for (i = 0; modname[i]; i++)
211 hash = ((hash << 5) + hash) + modname[i];
212 hash %= DB_HASH_SIZE;
213
214 for (l = G.db[hash]; l; l = l->link) {
215 e = (struct module_entry *) l->data;
216 if (strcmp(e->modname, modname) == 0)
217 return e;
218 }
219 if (!create)
220 return NULL;
221
222 e = xzalloc(sizeof(*e));
223 e->modname = xstrdup(modname);
224 llist_add_to(&G.db[hash], e);
225
226 return e;
227}
228static ALWAYS_INLINE struct module_entry *get_or_add_modentry(const char *module)
229{
230 return helper_get_module(module, 1);
231}
232static ALWAYS_INLINE struct module_entry *get_modentry(const char *module)
233{
234 return helper_get_module(module, 0);
235}
236
237static void add_probe(const char *name)
238{
239 struct module_entry *m;
240
241 m = get_or_add_modentry(name);
242 if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
243 && (m->flags & MODULE_FLAG_LOADED)
244 ) {
245 DBG("skipping %s, it is already loaded", name);
246 return;
247 }
248
249 DBG("queuing %s", name);
250 m->probed_name = name;
251 m->flags |= MODULE_FLAG_NEED_DEPS;
252 llist_add_to_end(&G.probes, m);
253 G.num_unresolved_deps++;
254 if (ENABLE_FEATURE_MODUTILS_SYMBOLS
255 && strncmp(m->modname, "symbol:", 7) == 0
256 ) {
257 G.need_symbols = 1;
258 }
259}
260
261static int FAST_FUNC config_file_action(const char *filename,
262 struct stat *statbuf UNUSED_PARAM,
263 void *userdata UNUSED_PARAM,
264 int depth UNUSED_PARAM)
265{
266 char *tokens[3];
267 parser_t *p;
268 struct module_entry *m;
269 int rc = TRUE;
270
271 if (bb_basename(filename)[0] == '.')
272 goto error;
273
274 p = config_open2(filename, fopen_for_read);
275 if (p == NULL) {
276 rc = FALSE;
277 goto error;
278 }
279
280 while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
281//Use index_in_strings?
282 if (strcmp(tokens[0], "alias") == 0) {
283 /* alias <wildcard> <modulename> */
284 llist_t *l;
285 char wildcard[MODULE_NAME_LEN];
286 char *rmod;
287
288 if (tokens[2] == NULL)
289 continue;
290 filename2modname(tokens[1], wildcard);
291
292 for (l = G.probes; l; l = l->link) {
293 m = (struct module_entry *) l->data;
294 if (fnmatch(wildcard, m->modname, 0) != 0)
295 continue;
296 rmod = filename2modname(tokens[2], NULL);
297 llist_add_to(&m->realnames, rmod);
298
299 if (m->flags & MODULE_FLAG_NEED_DEPS) {
300 m->flags &= ~MODULE_FLAG_NEED_DEPS;
301 G.num_unresolved_deps--;
302 }
303
304 m = get_or_add_modentry(rmod);
305 if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
306 m->flags |= MODULE_FLAG_NEED_DEPS;
307 G.num_unresolved_deps++;
308 }
309 }
310 } else if (strcmp(tokens[0], "options") == 0) {
311 /* options <modulename> <option...> */
312 if (tokens[2] == NULL)
313 continue;
314 m = get_or_add_modentry(tokens[1]);
315 m->options = gather_options_str(m->options, tokens[2]);
316 } else if (strcmp(tokens[0], "include") == 0) {
317 /* include <filename> */
318 read_config(tokens[1]);
319 } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
320 && strcmp(tokens[0], "blacklist") == 0
321 ) {
322 /* blacklist <modulename> */
323 get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
324 }
325 }
326 config_close(p);
327 error:
328 return rc;
329}
330
331static int read_config(const char *path)
332{
333 return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
334 config_file_action, NULL, NULL, 1);
335}
336
337static const char *humanly_readable_name(struct module_entry *m)
338{
339 /* probed_name may be NULL. modname always exists. */
340 return m->probed_name ? m->probed_name : m->modname;
341}
342
343static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
344{
345 char *kcmdline_buf;
346 char *kcmdline;
347 char *kptr;
348 int len;
349
350 kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
351 if (!kcmdline_buf)
352 return options;
353
354 kcmdline = kcmdline_buf;
355 len = strlen(modulename);
356 while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) {
357 if (strncmp(modulename, kptr, len) != 0)
358 continue;
359 kptr += len;
360 if (*kptr != '.')
361 continue;
362 /* It is "modulename.xxxx" */
363 kptr++;
364 if (strchr(kptr, '=') != NULL) {
365 /* It is "modulename.opt=[val]" */
366 options = gather_options_str(options, kptr);
367 }
368 }
369 free(kcmdline_buf);
370
371 return options;
372}
373
374/* Return: similar to bb_init_module:
375 * 0 on success,
376 * -errno on open/read error,
377 * errno on init_module() error
378 */
379/* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
380 * not deleted ones (those are still listed in modules.dep).
381 * module-init-tools version 3.4:
382 * # modprobe bogus
383 * FATAL: Module bogus not found. [exitcode 1]
384 * # modprobe -q bogus [silent, exitcode still 1]
385 * but:
386 * # rm kernel/drivers/net/dummy.ko
387 * # modprobe -q dummy
388 * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
389 * [exitcode 1]
390 */
391static int do_modprobe(struct module_entry *m)
392{
393 int rc, first;
394
395 if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
396 if (!(option_mask32 & INSMOD_OPT_SILENT))
397 bb_error_msg("module %s not found in modules.dep",
398 humanly_readable_name(m));
399 return -ENOENT;
400 }
401 DBG("do_modprob'ing %s", m->modname);
402
403 if (!(option_mask32 & OPT_REMOVE))
404 m->deps = llist_rev(m->deps);
405
406 if (0) {
407 llist_t *l;
408 for (l = m->deps; l; l = l->link)
409 DBG("dep: %s", l->data);
410 }
411
412 first = 1;
413 rc = 0;
414 while (m->deps) {
415 struct module_entry *m2;
416 char *fn, *options;
417
418 rc = 0;
419 fn = llist_pop(&m->deps); /* we leak it */
420 m2 = get_or_add_modentry(fn);
421
422 if (option_mask32 & OPT_REMOVE) {
423 /* modprobe -r */
424 if (m2->flags & MODULE_FLAG_LOADED) {
425 rc = bb_delete_module(m2->modname, O_EXCL);
426 if (rc) {
427 if (first) {
428 bb_error_msg("can't unload module %s: %s",
429 humanly_readable_name(m2),
430 moderror(rc));
431 break;
432 }
433 } else {
434 m2->flags &= ~MODULE_FLAG_LOADED;
435 }
436 }
437 /* do not error out if *deps* fail to unload */
438 first = 0;
439 continue;
440 }
441
442 options = m2->options;
443 m2->options = NULL;
444 options = parse_and_add_kcmdline_module_options(options, m2->modname);
445 if (m == m2)
446 options = gather_options_str(options, G.cmdline_mopts);
447
448 if (option_mask32 & OPT_SHOW_DEPS) {
449 printf(options ? "insmod %s/%s/%s %s\n"
450 : "insmod %s/%s/%s\n",
451 CONFIG_DEFAULT_MODULES_DIR, G.uts.release, fn,
452 options);
453 free(options);
454 continue;
455 }
456
457 if (m2->flags & MODULE_FLAG_LOADED) {
458 DBG("%s is already loaded, skipping", fn);
459 free(options);
460 continue;
461 }
462
463 rc = bb_init_module(fn, options);
464 DBG("loaded %s '%s', rc:%d", fn, options, rc);
465 if (rc == EEXIST)
466 rc = 0;
467 free(options);
468 if (rc) {
469 bb_error_msg("can't load module %s (%s): %s",
470 humanly_readable_name(m2),
471 fn,
472 moderror(rc)
473 );
474 break;
475 }
476 m2->flags |= MODULE_FLAG_LOADED;
477 }
478
479 return rc;
480}
481
482static void load_modules_dep(void)
483{
484 struct module_entry *m;
485 char *colon, *tokens[2];
486 parser_t *p;
487
488 /* Modprobe does not work at all without modules.dep,
489 * even if the full module name is given. Returning error here
490 * was making us later confuse user with this message:
491 * "module /full/path/to/existing/file/module.ko not found".
492 * It's better to die immediately, with good message.
493 * xfopen_for_read provides that. */
494 p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
495
496 while (G.num_unresolved_deps
497 && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
498 ) {
499 colon = last_char_is(tokens[0], ':');
500 if (colon == NULL)
501 continue;
502 *colon = 0;
503
504 m = get_modentry(tokens[0]);
505 if (m == NULL)
506 continue;
507
508 /* Optimization... */
509 if ((m->flags & MODULE_FLAG_LOADED)
510 && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
511 ) {
512 DBG("skip deps of %s, it's already loaded", tokens[0]);
513 continue;
514 }
515
516 m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
517 if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
518 G.num_unresolved_deps--;
519 llist_add_to(&m->deps, xstrdup(tokens[0]));
520 if (tokens[1])
521 string_to_llist(tokens[1], &m->deps, " \t");
522 } else
523 DBG("skipping dep line");
524 }
525 config_close(p);
526}
527
528int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
529int modprobe_main(int argc UNUSED_PARAM, char **argv)
530{
531 int rc;
532 unsigned opt;
533 struct module_entry *me;
534
535 INIT_G();
536
537 IF_LONG_OPTS(applet_long_options = modprobe_longopts;)
538 opt_complementary = MODPROBE_COMPLEMENTARY;
539 opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
540 argv += optind;
541
542 /* Goto modules location */
543 xchdir(CONFIG_DEFAULT_MODULES_DIR);
544 uname(&G.uts);
545 xchdir(G.uts.release);
546
547 if (opt & OPT_LIST_ONLY) {
548 int i;
549 char name[MODULE_NAME_LEN];
550 char *colon, *tokens[2];
551 parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
552
553 for (i = 0; argv[i]; i++)
554 replace(argv[i], '-', '_');
555
556 while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
557 colon = last_char_is(tokens[0], ':');
558 if (!colon)
559 continue;
560 *colon = '\0';
561 filename2modname(tokens[0], name);
562 if (!argv[0])
563 puts(tokens[0]);
564 else {
565 for (i = 0; argv[i]; i++) {
566 if (fnmatch(argv[i], name, 0) == 0) {
567 puts(tokens[0]);
568 }
569 }
570 }
571 }
572 return EXIT_SUCCESS;
573 }
574
575 /* Yes, for some reason -l ignores -s... */
576 if (opt & INSMOD_OPT_SYSLOG)
577 logmode = LOGMODE_SYSLOG;
578
579 if (!argv[0]) {
580 if (opt & OPT_REMOVE) {
581 /* "modprobe -r" (w/o params).
582 * "If name is NULL, all unused modules marked
583 * autoclean will be removed".
584 */
585 if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
586 bb_perror_msg_and_die("rmmod");
587 }
588 return EXIT_SUCCESS;
589 }
590
591 /* Retrieve module names of already loaded modules */
592 {
593 char *s;
594 parser_t *parser = config_open2("/proc/modules", fopen_for_read);
595 while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
596 get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
597 config_close(parser);
598 }
599
600 if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) {
601 /* Each argument is a module name */
602 do {
603 DBG("adding module %s", *argv);
604 add_probe(*argv++);
605 } while (*argv);
606 } else {
607 /* First argument is module name, rest are parameters */
608 DBG("probing just module %s", *argv);
609 add_probe(argv[0]);
610 G.cmdline_mopts = parse_cmdline_module_options(argv, /*quote_spaces:*/ 1);
611 }
612
613 /* Happens if all requested modules are already loaded */
614 if (G.probes == NULL)
615 return EXIT_SUCCESS;
616
617 read_config("/etc/modprobe.conf");
618 read_config("/etc/modprobe.d");
619 if (ENABLE_FEATURE_MODUTILS_SYMBOLS && G.need_symbols)
620 read_config("modules.symbols");
621 load_modules_dep();
622 if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
623 read_config("modules.alias");
624 load_modules_dep();
625 }
626
627 rc = 0;
628 while ((me = llist_pop(&G.probes)) != NULL) {
629 if (me->realnames == NULL) {
630 DBG("probing by module name");
631 /* This is not an alias. Literal names are blacklisted
632 * only if '-b' is given.
633 */
634 if (!(opt & OPT_BLACKLIST)
635 || !(me->flags & MODULE_FLAG_BLACKLISTED)
636 ) {
637 rc |= do_modprobe(me);
638 }
639 continue;
640 }
641
642 /* Probe all real names for the alias */
643 do {
644 char *realname = llist_pop(&me->realnames);
645 struct module_entry *m2;
646
647 DBG("probing alias %s by realname %s", me->modname, realname);
648 m2 = get_or_add_modentry(realname);
649 if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
650 && (!(m2->flags & MODULE_FLAG_LOADED)
651 || (opt & (OPT_REMOVE | OPT_SHOW_DEPS)))
652 ) {
653//TODO: we can pass "me" as 2nd param to do_modprobe,
654//and make do_modprobe emit more meaningful error messages
655//with alias name included, not just module name alias resolves to.
656 rc |= do_modprobe(m2);
657 }
658 free(realname);
659 } while (me->realnames != NULL);
660 }
661
662 return (rc != 0);
663}
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