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Annotation of /trunk/mkinitrd-magellan/busybox/modutils/modprobe.c

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Revision 1123 - (hide annotations) (download)
Wed Aug 18 21:56:57 2010 UTC (14 years, 2 months ago) by niro
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File size: 18234 byte(s)
-updated to busybox-1.17.1
1 niro 532 /* vi: set sw=4 ts=4: */
2     /*
3     * Modprobe written from scratch for BusyBox
4     *
5 niro 816 * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
6     * Copyright (c) 2008 Vladimir Dronnikov
7 niro 532 *
8     * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9 niro 816 */
10 niro 532
11 niro 984 /* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
12     * we expect the full dependency list to be specified in modules.dep.
13     * Older versions would only export the direct dependency list.
14     */
15 niro 816 #include "libbb.h"
16     #include "modutils.h"
17 niro 532 #include <sys/utsname.h>
18     #include <fnmatch.h>
19    
20 niro 984 //#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
21     #define DBG(...) ((void)0)
22 niro 532
23 niro 1123 //usage:#if !ENABLE_MODPROBE_SMALL
24     //usage:#define modprobe_notes_usage
25     //usage: "modprobe can (un)load a stack of modules, passing each module options (when\n"
26     //usage: "loading). modprobe uses a configuration file to determine what option(s) to\n"
27     //usage: "pass each module it loads.\n"
28     //usage: "\n"
29     //usage: "The configuration file is searched (in this order):\n"
30     //usage: "\n"
31     //usage: " /etc/modprobe.conf (2.6 only)\n"
32     //usage: " /etc/modules.conf\n"
33     //usage: " /etc/conf.modules (deprecated)\n"
34     //usage: "\n"
35     //usage: "They all have the same syntax (see below). If none is present, it is\n"
36     //usage: "_not_ an error; each loaded module is then expected to load without\n"
37     //usage: "options. Once a file is found, the others are tested for.\n"
38     //usage: "\n"
39     //usage: "/etc/modules.conf entry format:\n"
40     //usage: "\n"
41     //usage: " alias <alias_name> <mod_name>\n"
42     //usage: " Makes it possible to modprobe alias_name, when there is no such module.\n"
43     //usage: " It makes sense if your mod_name is long, or you want a more representative\n"
44     //usage: " name for that module (eg. 'scsi' in place of 'aha7xxx').\n"
45     //usage: " This makes it also possible to use a different set of options (below) for\n"
46     //usage: " the module and the alias.\n"
47     //usage: " A module can be aliased more than once.\n"
48     //usage: "\n"
49     //usage: " options <mod_name|alias_name> <symbol=value...>\n"
50     //usage: " When loading module mod_name (or the module aliased by alias_name), pass\n"
51     //usage: " the \"symbol=value\" pairs as option to that module.\n"
52     //usage: "\n"
53     //usage: "Sample /etc/modules.conf file:\n"
54     //usage: "\n"
55     //usage: " options tulip irq=3\n"
56     //usage: " alias tulip tulip2\n"
57     //usage: " options tulip2 irq=4 io=0x308\n"
58     //usage: "\n"
59     //usage: "Other functionality offered by 'classic' modprobe is not available in\n"
60     //usage: "this implementation.\n"
61     //usage: "\n"
62     //usage: "If module options are present both in the config file, and on the command line,\n"
63     //usage: "then the options from the command line will be passed to the module _after_\n"
64     //usage: "the options from the config file. That way, you can have defaults in the config\n"
65     //usage: "file, and override them for a specific usage from the command line.\n"
66     //usage:#define modprobe_example_usage
67     //usage: "(with the above /etc/modules.conf):\n\n"
68     //usage: "$ modprobe tulip\n"
69     //usage: " will load the module 'tulip' with default option 'irq=3'\n\n"
70     //usage: "$ modprobe tulip irq=5\n"
71     //usage: " will load the module 'tulip' with option 'irq=5', thus overriding the default\n\n"
72     //usage: "$ modprobe tulip2\n"
73     //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308',\n"
74     //usage: " which are the default for alias 'tulip2'\n\n"
75     //usage: "$ modprobe tulip2 irq=8\n"
76     //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=8',\n"
77     //usage: " which are the default for alias 'tulip2' overridden by the option 'irq=8'\n\n"
78     //usage: " from the command line\n\n"
79     //usage: "$ modprobe tulip2 irq=2 io=0x210\n"
80     //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=4 io=0x210',\n"
81     //usage: " which are the default for alias 'tulip2' overridden by the options 'irq=2 io=0x210'\n\n"
82     //usage: " from the command line\n"
83     //usage:
84     //usage:#define modprobe_trivial_usage
85     //usage: "[-alrqvs"
86     //usage: IF_FEATURE_MODPROBE_BLACKLIST("b")
87     //usage: "] MODULE [symbol=value]..."
88     //usage:#define modprobe_full_usage "\n\n"
89     //usage: "Options:"
90     //usage: "\n -a Load multiple MODULEs"
91     //usage: "\n -l List (MODULE is a pattern)"
92     //usage: "\n -r Remove MODULE (stacks) or do autoclean"
93     //usage: "\n -q Quiet"
94     //usage: "\n -v Verbose"
95     //usage: "\n -s Log to syslog"
96     //usage: IF_FEATURE_MODPROBE_BLACKLIST(
97     //usage: "\n -b Apply blacklist to module names too"
98     //usage: )
99     //usage:#endif /* !ENABLE_MODPROBE_SMALL */
100    
101     /* Note that usage text doesn't document various 2.4 options
102     * we pull in through INSMOD_OPTS define */
103    
104     #define MODPROBE_COMPLEMENTARY "q-v:v-q:l--ar:a--lr:r--al"
105     #define MODPROBE_OPTS "alr" IF_FEATURE_MODPROBE_BLACKLIST("b")
106     //#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
107     //#define MODPROBE_OPTS "acd:lnrt:C:" IF_FEATURE_MODPROBE_BLACKLIST("b")
108     enum {
109     MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
110     //MODPROBE_OPT_DUMP_ONLY= (INSMOD_OPT_UNUSED << x), /* c */
111     //MODPROBE_OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
112     MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
113     //MODPROBE_OPT_SHOW_ONLY= (INSMOD_OPT_UNUSED << x), /* n */
114     MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
115     //MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
116     //MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
117     //MODPROBE_OPT_CONFIGFILE=(INSMOD_OPT_UNUSED << x), /* C */
118     MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 3) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
119     };
120    
121 niro 984 #define MODULE_FLAG_LOADED 0x0001
122     #define MODULE_FLAG_NEED_DEPS 0x0002
123     /* "was seen in modules.dep": */
124     #define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
125     #define MODULE_FLAG_BLACKLISTED 0x0008
126    
127     struct module_entry { /* I'll call it ME. */
128     unsigned flags;
129     char *modname; /* stripped of /path/, .ext and s/-/_/g */
130     const char *probed_name; /* verbatim as seen on cmdline */
131     char *options; /* options from config files */
132     llist_t *realnames; /* strings. if this module is an alias, */
133     /* real module name is one of these. */
134     //Can there really be more than one? Example from real kernel?
135     llist_t *deps; /* strings. modules we depend on */
136 niro 532 };
137    
138 niro 984 struct globals {
139     llist_t *db; /* MEs of all modules ever seen (caching for speed) */
140     llist_t *probes; /* MEs of module(s) requested on cmdline */
141     char *cmdline_mopts; /* module options from cmdline */
142     int num_unresolved_deps;
143     /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
144     smallint need_symbols;
145 niro 1123 } FIX_ALIASING;
146 niro 984 #define G (*(struct globals*)&bb_common_bufsiz1)
147     #define INIT_G() do { } while (0)
148 niro 532
149    
150 niro 984 static int read_config(const char *path);
151    
152     static char *gather_options_str(char *opts, const char *append)
153 niro 816 {
154 niro 984 /* Speed-optimized. We call gather_options_str many times. */
155     if (append) {
156     if (opts == NULL) {
157     opts = xstrdup(append);
158     } else {
159     int optlen = strlen(opts);
160     opts = xrealloc(opts, optlen + strlen(append) + 2);
161     sprintf(opts + optlen, " %s", append);
162     }
163     }
164     return opts;
165     }
166 niro 532
167 niro 984 static struct module_entry *helper_get_module(const char *module, int create)
168     {
169     char modname[MODULE_NAME_LEN];
170     struct module_entry *e;
171     llist_t *l;
172    
173     filename2modname(module, modname);
174     for (l = G.db; l != NULL; l = l->link) {
175     e = (struct module_entry *) l->data;
176     if (strcmp(e->modname, modname) == 0)
177     return e;
178     }
179     if (!create)
180     return NULL;
181    
182     e = xzalloc(sizeof(*e));
183     e->modname = xstrdup(modname);
184     llist_add_to(&G.db, e);
185    
186     return e;
187 niro 816 }
188 niro 984 static struct module_entry *get_or_add_modentry(const char *module)
189     {
190     return helper_get_module(module, 1);
191     }
192     static struct module_entry *get_modentry(const char *module)
193     {
194     return helper_get_module(module, 0);
195     }
196 niro 532
197 niro 984 static void add_probe(const char *name)
198     {
199     struct module_entry *m;
200    
201     m = get_or_add_modentry(name);
202     if (!(option_mask32 & MODPROBE_OPT_REMOVE)
203     && (m->flags & MODULE_FLAG_LOADED)
204     ) {
205     DBG("skipping %s, it is already loaded", name);
206     return;
207     }
208    
209     DBG("queuing %s", name);
210     m->probed_name = name;
211     m->flags |= MODULE_FLAG_NEED_DEPS;
212     llist_add_to_end(&G.probes, m);
213     G.num_unresolved_deps++;
214     if (ENABLE_FEATURE_MODUTILS_SYMBOLS
215     && strncmp(m->modname, "symbol:", 7) == 0
216     ) {
217     G.need_symbols = 1;
218     }
219     }
220    
221 niro 816 static int FAST_FUNC config_file_action(const char *filename,
222     struct stat *statbuf UNUSED_PARAM,
223 niro 984 void *userdata UNUSED_PARAM,
224 niro 816 int depth UNUSED_PARAM)
225 niro 532 {
226 niro 816 char *tokens[3];
227     parser_t *p;
228 niro 984 struct module_entry *m;
229 niro 816 int rc = TRUE;
230 niro 532
231 niro 816 if (bb_basename(filename)[0] == '.')
232     goto error;
233 niro 532
234 niro 816 p = config_open2(filename, fopen_for_read);
235     if (p == NULL) {
236     rc = FALSE;
237     goto error;
238     }
239 niro 532
240 niro 816 while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
241 niro 984 //Use index_in_strings?
242 niro 816 if (strcmp(tokens[0], "alias") == 0) {
243 niro 984 /* alias <wildcard> <modulename> */
244     llist_t *l;
245     char wildcard[MODULE_NAME_LEN];
246     char *rmod;
247    
248     if (tokens[2] == NULL)
249     continue;
250     filename2modname(tokens[1], wildcard);
251    
252     for (l = G.probes; l != NULL; l = l->link) {
253     m = (struct module_entry *) l->data;
254     if (fnmatch(wildcard, m->modname, 0) != 0)
255     continue;
256     rmod = filename2modname(tokens[2], NULL);
257     llist_add_to(&m->realnames, rmod);
258    
259     if (m->flags & MODULE_FLAG_NEED_DEPS) {
260     m->flags &= ~MODULE_FLAG_NEED_DEPS;
261     G.num_unresolved_deps--;
262     }
263    
264     m = get_or_add_modentry(rmod);
265     if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
266     m->flags |= MODULE_FLAG_NEED_DEPS;
267     G.num_unresolved_deps++;
268     }
269     }
270 niro 816 } else if (strcmp(tokens[0], "options") == 0) {
271 niro 984 /* options <modulename> <option...> */
272     if (tokens[2] == NULL)
273     continue;
274     m = get_or_add_modentry(tokens[1]);
275     m->options = gather_options_str(m->options, tokens[2]);
276 niro 816 } else if (strcmp(tokens[0], "include") == 0) {
277 niro 984 /* include <filename> */
278     read_config(tokens[1]);
279     } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
280     && strcmp(tokens[0], "blacklist") == 0
281     ) {
282     /* blacklist <modulename> */
283     get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
284 niro 532 }
285     }
286 niro 816 config_close(p);
287 niro 984 error:
288 niro 816 return rc;
289 niro 532 }
290    
291 niro 984 static int read_config(const char *path)
292 niro 532 {
293 niro 816 return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
294 niro 984 config_file_action, NULL, NULL, 1);
295 niro 532 }
296    
297 niro 984 static const char *humanly_readable_name(struct module_entry *m)
298 niro 532 {
299 niro 984 /* probed_name may be NULL. modname always exists. */
300     return m->probed_name ? m->probed_name : m->modname;
301     }
302 niro 532
303 niro 1123 static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
304     {
305     char *kcmdline_buf;
306     char *kcmdline;
307     char *kptr;
308     int len;
309    
310     kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
311     if (!kcmdline_buf)
312     return options;
313    
314     kcmdline = kcmdline_buf;
315     len = strlen(modulename);
316     while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) {
317     if (strncmp(modulename, kptr, len) != 0)
318     continue;
319     kptr += len;
320     if (*kptr != '.')
321     continue;
322     /* It is "modulename.xxxx" */
323     kptr++;
324     if (strchr(kptr, '=') != NULL) {
325     /* It is "modulename.opt=[val]" */
326     options = gather_options_str(options, kptr);
327     }
328     }
329     free(kcmdline_buf);
330    
331     return options;
332     }
333    
334 niro 984 /* Return: similar to bb_init_module:
335     * 0 on success,
336     * -errno on open/read error,
337     * errno on init_module() error
338     */
339 niro 1123 /* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
340     * not deleted ones (those are still listed in modules.dep).
341     * module-init-tools version 3.4:
342     * # modprobe bogus
343     * FATAL: Module bogus not found. [exitcode 1]
344     * # modprobe -q bogus [silent, exitcode still 1]
345     * but:
346     * # rm kernel/drivers/net/dummy.ko
347     * # modprobe -q dummy
348     * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
349     * [exitcode 1]
350     */
351 niro 984 static int do_modprobe(struct module_entry *m)
352     {
353     struct module_entry *m2 = m2; /* for compiler */
354     char *fn, *options;
355     int rc, first;
356     llist_t *l;
357 niro 532
358 niro 984 if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
359     if (!(option_mask32 & INSMOD_OPT_SILENT))
360     bb_error_msg("module %s not found in modules.dep",
361     humanly_readable_name(m));
362     return -ENOENT;
363     }
364     DBG("do_modprob'ing %s", m->modname);
365    
366     if (!(option_mask32 & MODPROBE_OPT_REMOVE))
367     m->deps = llist_rev(m->deps);
368    
369     for (l = m->deps; l != NULL; l = l->link)
370     DBG("dep: %s", l->data);
371    
372     first = 1;
373     rc = 0;
374     while (m->deps) {
375     rc = 0;
376     fn = llist_pop(&m->deps); /* we leak it */
377     m2 = get_or_add_modentry(fn);
378    
379     if (option_mask32 & MODPROBE_OPT_REMOVE) {
380     /* modprobe -r */
381     if (m2->flags & MODULE_FLAG_LOADED) {
382     rc = bb_delete_module(m2->modname, O_EXCL);
383     if (rc) {
384     if (first) {
385 niro 1123 bb_error_msg("can't unload module %s: %s",
386 niro 984 humanly_readable_name(m2),
387     moderror(rc));
388     break;
389     }
390     } else {
391     m2->flags &= ~MODULE_FLAG_LOADED;
392     }
393     }
394     /* do not error out if *deps* fail to unload */
395     first = 0;
396 niro 532 continue;
397 niro 984 }
398    
399     if (m2->flags & MODULE_FLAG_LOADED) {
400     DBG("%s is already loaded, skipping", fn);
401 niro 816 continue;
402 niro 984 }
403 niro 532
404 niro 984 options = m2->options;
405     m2->options = NULL;
406 niro 1123 options = parse_and_add_kcmdline_module_options(options, m2->modname);
407 niro 984 if (m == m2)
408     options = gather_options_str(options, G.cmdline_mopts);
409     rc = bb_init_module(fn, options);
410     DBG("loaded %s '%s', rc:%d", fn, options, rc);
411     if (rc == EEXIST)
412     rc = 0;
413     free(options);
414     if (rc) {
415 niro 1123 bb_error_msg("can't load module %s (%s): %s",
416 niro 984 humanly_readable_name(m2),
417     fn,
418     moderror(rc)
419     );
420     break;
421     }
422     m2->flags |= MODULE_FLAG_LOADED;
423 niro 532 }
424 niro 984
425     return rc;
426 niro 532 }
427    
428 niro 984 static void load_modules_dep(void)
429 niro 532 {
430 niro 984 struct module_entry *m;
431     char *colon, *tokens[2];
432 niro 816 parser_t *p;
433 niro 532
434 niro 984 /* Modprobe does not work at all without modules.dep,
435     * even if the full module name is given. Returning error here
436     * was making us later confuse user with this message:
437     * "module /full/path/to/existing/file/module.ko not found".
438     * It's better to die immediately, with good message.
439     * xfopen_for_read provides that. */
440     p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
441 niro 532
442 niro 984 while (G.num_unresolved_deps
443     && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
444     ) {
445 niro 816 colon = last_char_is(tokens[0], ':');
446     if (colon == NULL)
447 niro 532 continue;
448 niro 984 *colon = 0;
449 niro 532
450 niro 984 m = get_modentry(tokens[0]);
451     if (m == NULL)
452     continue;
453 niro 532
454 niro 984 /* Optimization... */
455     if ((m->flags & MODULE_FLAG_LOADED)
456     && !(option_mask32 & MODPROBE_OPT_REMOVE)
457     ) {
458     DBG("skip deps of %s, it's already loaded", tokens[0]);
459     continue;
460 niro 532 }
461    
462 niro 984 m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
463     if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
464     G.num_unresolved_deps--;
465     llist_add_to(&m->deps, xstrdup(tokens[0]));
466     if (tokens[1])
467     string_to_llist(tokens[1], &m->deps, " \t");
468     } else
469     DBG("skipping dep line");
470 niro 532 }
471 niro 816 config_close(p);
472 niro 532 }
473    
474 niro 816 int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
475     int modprobe_main(int argc UNUSED_PARAM, char **argv)
476 niro 532 {
477 niro 816 struct utsname uts;
478     int rc;
479     unsigned opt;
480 niro 984 struct module_entry *me;
481 niro 532
482 niro 1123 opt_complementary = MODPROBE_COMPLEMENTARY;
483     opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
484 niro 816 argv += optind;
485 niro 532
486 niro 1123 /* Goto modules location */
487     xchdir(CONFIG_DEFAULT_MODULES_DIR);
488     uname(&uts);
489     xchdir(uts.release);
490 niro 532
491 niro 1123 if (opt & MODPROBE_OPT_LIST_ONLY) {
492     char name[MODULE_NAME_LEN];
493     char *colon, *tokens[2];
494     parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
495    
496     while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
497     colon = last_char_is(tokens[0], ':');
498     if (!colon)
499     continue;
500     *colon = '\0';
501     filename2modname(tokens[0], name);
502     if (!argv[0])
503     puts(tokens[0]);
504     else {
505     int i;
506     for (i = 0; argv[i]; i++) {
507     if (fnmatch(argv[i], name, 0) == 0) {
508     puts(tokens[0]);
509     }
510     }
511     }
512     }
513     return EXIT_SUCCESS;
514     }
515    
516     /* Yes, for some reason -l ignores -s... */
517     if (opt & INSMOD_OPT_SYSLOG)
518     logmode = LOGMODE_SYSLOG;
519    
520 niro 816 if (!argv[0]) {
521     if (opt & MODPROBE_OPT_REMOVE) {
522 niro 984 /* "modprobe -r" (w/o params).
523     * "If name is NULL, all unused modules marked
524     * autoclean will be removed".
525     */
526     if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
527 niro 816 bb_perror_msg_and_die("rmmod");
528 niro 532 }
529 niro 816 return EXIT_SUCCESS;
530 niro 532 }
531    
532 niro 984 /* Retrieve module names of already loaded modules */
533 niro 816 {
534     char *s;
535     parser_t *parser = config_open2("/proc/modules", fopen_for_read);
536     while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
537 niro 984 get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
538 niro 816 config_close(parser);
539 niro 532 }
540    
541 niro 984 if (opt & (MODPROBE_OPT_INSERT_ALL | MODPROBE_OPT_REMOVE)) {
542     /* Each argument is a module name */
543     do {
544     DBG("adding module %s", *argv);
545     add_probe(*argv++);
546     } while (*argv);
547     } else {
548     /* First argument is module name, rest are parameters */
549     DBG("probing just module %s", *argv);
550     add_probe(argv[0]);
551     G.cmdline_mopts = parse_cmdline_module_options(argv);
552     }
553 niro 532
554 niro 984 /* Happens if all requested modules are already loaded */
555     if (G.probes == NULL)
556     return EXIT_SUCCESS;
557    
558     read_config("/etc/modprobe.conf");
559     read_config("/etc/modprobe.d");
560     if (ENABLE_FEATURE_MODUTILS_SYMBOLS && G.need_symbols)
561     read_config("modules.symbols");
562     load_modules_dep();
563     if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
564     read_config("modules.alias");
565     load_modules_dep();
566     }
567    
568     rc = 0;
569     while ((me = llist_pop(&G.probes)) != NULL) {
570     if (me->realnames == NULL) {
571     DBG("probing by module name");
572     /* This is not an alias. Literal names are blacklisted
573     * only if '-b' is given.
574     */
575     if (!(opt & MODPROBE_OPT_BLACKLIST)
576     || !(me->flags & MODULE_FLAG_BLACKLISTED)
577     ) {
578     rc |= do_modprobe(me);
579     }
580     continue;
581 niro 532 }
582    
583 niro 984 /* Probe all real names for the alias */
584     do {
585     char *realname = llist_pop(&me->realnames);
586     struct module_entry *m2;
587 niro 532
588 niro 984 DBG("probing alias %s by realname %s", me->modname, realname);
589     m2 = get_or_add_modentry(realname);
590     if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
591     && (!(m2->flags & MODULE_FLAG_LOADED)
592     || (opt & MODPROBE_OPT_REMOVE))
593     ) {
594     //TODO: we can pass "me" as 2nd param to do_modprobe,
595     //and make do_modprobe emit more meaningful error messages
596     //with alias name included, not just module name alias resolves to.
597     rc |= do_modprobe(m2);
598 niro 532 }
599 niro 984 free(realname);
600     } while (me->realnames != NULL);
601 niro 532 }
602    
603 niro 984 return (rc != 0);
604 niro 532 }