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3dc7665bd207237d8b9b9474e802174250d8f952
[project/ubox.git] / kmodloader.c
1 /*
2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #define _GNU_SOURCE
16 #include <sys/syscall.h>
17 #include <sys/mman.h>
18 #include <sys/utsname.h>
19
20 #include <stdlib.h>
21 #include <unistd.h>
22 #include <sys/syscall.h>
23 #include <sys/types.h>
24 #include <values.h>
25 #include <errno.h>
26 #include <stdio.h>
27 #include <string.h>
28 #include <sys/stat.h>
29 #include <fcntl.h>
30 #include <libgen.h>
31 #include <glob.h>
32 #include <elf.h>
33
34 #include <libubox/avl.h>
35 #include <libubox/avl-cmp.h>
36 #include <libubox/utils.h>
37 #include <libubox/ulog.h>
38
39 #define DEF_MOD_PATH "/modules/%s/"
40
41 enum {
42 SCANNED,
43 PROBE,
44 LOADED,
45 };
46
47 struct module {
48 char *name;
49 char *depends;
50 char *opts;
51
52 int size;
53 int usage;
54 int state;
55 int error;
56 int refcnt; /* number of references from module_node.m */
57 };
58
59 struct module_node {
60 struct avl_node avl;
61 struct module *m;
62 bool is_alias;
63 };
64
65 static struct avl_tree modules;
66
67 static char **module_folders = NULL;
68
69 static void free_module(struct module *m);
70
71 static int init_module_folders(void)
72 {
73 int n = 0;
74 struct stat st;
75 struct utsname ver;
76 char *s, *e, *p, path[256], ldpath[256];
77
78 e = ldpath;
79 s = getenv("LD_LIBRARY_PATH");
80
81 if (s)
82 e += snprintf(ldpath, sizeof(ldpath), "%s:", s);
83
84 e += snprintf(e, sizeof(ldpath) - (e - ldpath), "/lib");
85
86 uname(&ver);
87
88 for (s = p = ldpath; p <= e; p++) {
89 if (*p != ':' && *p != '\0')
90 continue;
91
92 *p = 0;
93 snprintf(path, sizeof(path), "%s" DEF_MOD_PATH, s, ver.release);
94
95 if (!stat(path, &st) && S_ISDIR(st.st_mode)) {
96 module_folders = realloc(module_folders, sizeof(p) * (n + 2));
97
98 if (!module_folders)
99 return -1;
100
101 module_folders[n++] = strdup(path);
102 }
103
104 s = p + 1;
105 }
106
107 if (!module_folders)
108 return -1;
109
110 module_folders[n] = NULL;
111 return 0;
112 }
113
114 static struct module *find_module(const char *name)
115 {
116 struct module_node *mn;
117 mn = avl_find_element(&modules, name, mn, avl);
118 if (mn)
119 return mn->m;
120 else
121 return NULL;
122 }
123
124 static void free_modules(void)
125 {
126 struct module_node *mn, *tmp;
127
128 avl_remove_all_elements(&modules, mn, avl, tmp) {
129 struct module *m = mn->m;
130
131 m->refcnt -= 1;
132 if (m->refcnt == 0)
133 free_module(m);
134 free(mn);
135 }
136 }
137
138 static char* get_module_path(char *name)
139 {
140 char **p;
141 static char path[256];
142 struct stat s;
143
144 if (!stat(name, &s) && S_ISREG(s.st_mode))
145 return name;
146
147 for (p = module_folders; *p; p++) {
148 snprintf(path, sizeof(path), "%s%s.ko", *p, name);
149 if (!stat(path, &s) && S_ISREG(s.st_mode))
150 return path;
151 }
152
153 return NULL;
154 }
155
156 static char* get_module_name(char *path)
157 {
158 static char name[33];
159 char *t;
160
161 strncpy(name, basename(path), sizeof(name) - 1);
162
163 t = strstr(name, ".ko");
164 if (t)
165 *t = '\0';
166
167 return name;
168 }
169
170 static int elf64_find_section(char *map, const char *section, unsigned int *offset, unsigned int *size)
171 {
172 const char *secnames;
173 Elf64_Ehdr *e;
174 Elf64_Shdr *sh;
175 int i;
176
177 e = (Elf64_Ehdr *) map;
178 sh = (Elf64_Shdr *) (map + e->e_shoff);
179
180 secnames = map + sh[e->e_shstrndx].sh_offset;
181 for (i = 0; i < e->e_shnum; i++) {
182 if (!strcmp(section, secnames + sh[i].sh_name)) {
183 *size = sh[i].sh_size;
184 *offset = sh[i].sh_offset;
185 return 0;
186 }
187 }
188
189 return -1;
190 }
191
192 static int elf32_find_section(char *map, const char *section, unsigned int *offset, unsigned int *size)
193 {
194 const char *secnames;
195 Elf32_Ehdr *e;
196 Elf32_Shdr *sh;
197 int i;
198
199 e = (Elf32_Ehdr *) map;
200 sh = (Elf32_Shdr *) (map + e->e_shoff);
201
202 secnames = map + sh[e->e_shstrndx].sh_offset;
203 for (i = 0; i < e->e_shnum; i++) {
204 if (!strcmp(section, secnames + sh[i].sh_name)) {
205 *size = sh[i].sh_size;
206 *offset = sh[i].sh_offset;
207 return 0;
208 }
209 }
210
211 return -1;
212 }
213
214 static int elf_find_section(char *map, const char *section, unsigned int *offset, unsigned int *size)
215 {
216 int clazz = map[EI_CLASS];
217 int endian = map[EI_DATA];
218
219 #if __BYTE_ORDER == __LITTLE_ENDIAN
220 if (endian != ELFDATA2LSB)
221 #elif __BYTE_ORDER == __BIG_ENDIAN
222 if (endian != ELFDATA2MSB)
223 #else
224 #error "unsupported endian"
225 #endif
226 {
227 ULOG_ERR("invalid endianess: %d\n", endian);
228 return -1;
229 }
230
231 if (clazz == ELFCLASS32)
232 return elf32_find_section(map, section, offset, size);
233 else if (clazz == ELFCLASS64)
234 return elf64_find_section(map, section, offset, size);
235
236 ULOG_ERR("unknown elf format %d\n", clazz);
237
238 return -1;
239 }
240
241 static struct module_node *
242 alloc_module_node(const char *name, struct module *m, bool is_alias)
243 {
244 struct module_node *mn;
245 char *_name;
246
247 mn = calloc_a(sizeof(*mn),
248 &_name, strlen(name) + 1);
249 if (mn) {
250 mn->avl.key = strcpy(_name, name);
251 mn->m = m;
252 mn->is_alias = is_alias;
253 avl_insert(&modules, &mn->avl);
254 m->refcnt += 1;
255 }
256 return mn;
257 }
258
259 static struct module *
260 alloc_module(const char *name, const char * const *aliases, int naliases, const char *depends, int size)
261 {
262 struct module *m;
263 char *_name, *_dep;
264 int i;
265
266 m = calloc_a(sizeof(*m),
267 &_name, strlen(name) + 1,
268 &_dep, depends ? strlen(depends) + 2 : 0);
269 if (!m)
270 return NULL;
271
272 m->name = strcpy(_name, name);
273 m->opts = 0;
274
275 if (depends) {
276 m->depends = strcpy(_dep, depends);
277 while (*_dep) {
278 if (*_dep == ',')
279 *_dep = '\0';
280 _dep++;
281 }
282 }
283 m->size = size;
284
285 m->refcnt = 0;
286 alloc_module_node(m->name, m, false);
287 for (i = 0; i < naliases; i++)
288 alloc_module_node(aliases[i], m, true);
289
290 return m;
291 }
292
293 static void free_module(struct module *m)
294 {
295 if (m->opts)
296 free(m->opts);
297 free(m);
298 }
299
300 static int scan_loaded_modules(void)
301 {
302 size_t buf_len = 0;
303 char *buf = NULL;
304 FILE *fp;
305
306 fp = fopen("/proc/modules", "r");
307 if (!fp) {
308 ULOG_ERR("failed to open /proc/modules\n");
309 return -1;
310 }
311
312 while (getline(&buf, &buf_len, fp) > 0) {
313 struct module m;
314 struct module *n;
315
316 m.name = strtok(buf, " ");
317 m.size = atoi(strtok(NULL, " "));
318 m.usage = atoi(strtok(NULL, " "));
319 m.depends = strtok(NULL, " ");
320
321 if (!m.name || !m.depends)
322 continue;
323
324 n = find_module(m.name);
325 if (!n) {
326 /* possibly a module outside /lib/modules/<ver>/ */
327 n = alloc_module(m.name, NULL, 0, m.depends, m.size);
328 }
329 n->usage = m.usage;
330 n->state = LOADED;
331 }
332 free(buf);
333 fclose(fp);
334
335 return 0;
336 }
337
338 static struct module* get_module_info(const char *module, const char *name)
339 {
340 int fd = open(module, O_RDONLY);
341 unsigned int offset, size;
342 char *map = MAP_FAILED, *strings, *dep = NULL;
343 const char *aliases[32] = { 0 };
344 int naliases = 0;
345 struct module *m = NULL;
346 struct stat s;
347
348 if (fd < 0) {
349 ULOG_ERR("failed to open %s\n", module);
350 goto out;
351 }
352
353 if (fstat(fd, &s) == -1) {
354 ULOG_ERR("failed to stat %s\n", module);
355 goto out;
356 }
357
358 map = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
359 if (map == MAP_FAILED) {
360 ULOG_ERR("failed to mmap %s\n", module);
361 goto out;
362 }
363
364 if (elf_find_section(map, ".modinfo", &offset, &size)) {
365 ULOG_ERR("failed to load the .modinfo section from %s\n", module);
366 goto out;
367 }
368
369 strings = map + offset;
370 while (true) {
371 char *sep;
372 int len;
373
374 while (!strings[0])
375 strings++;
376 if (strings >= map + offset + size)
377 break;
378 sep = strstr(strings, "=");
379 if (!sep)
380 break;
381 len = sep - strings;
382 sep++;
383 if (!strncmp(strings, "depends=", len + 1))
384 dep = sep;
385 else if (!strncmp(strings, "alias=", len + 1)) {
386 if (naliases < ARRAY_SIZE(aliases))
387 aliases[naliases++] = sep;
388 else
389 ULOG_WARN("module %s has more than %d aliases: truncated",
390 name, ARRAY_SIZE(aliases));
391 }
392 strings = &sep[strlen(sep)];
393 }
394
395 m = alloc_module(name, aliases, naliases, dep, s.st_size);
396
397 if (m)
398 m->state = SCANNED;
399
400 out:
401 if (map != MAP_FAILED)
402 munmap(map, s.st_size);
403
404 if (fd >= 0)
405 close(fd);
406
407 return m;
408 }
409
410 static int scan_module_folder(const char *dir)
411 {
412 int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
413 struct utsname ver;
414 char *path;
415 glob_t gl;
416 int j;
417
418 uname(&ver);
419 path = alloca(strlen(dir) + sizeof("*.ko") + 1);
420 sprintf(path, "%s*.ko", dir);
421
422 if (glob(path, gl_flags, NULL, &gl) < 0)
423 return -1;
424
425 for (j = 0; j < gl.gl_pathc; j++) {
426 char *name = get_module_name(gl.gl_pathv[j]);
427 struct module *m;
428
429 if (!name)
430 continue;
431
432 m = find_module(name);
433 if (!m)
434 get_module_info(gl.gl_pathv[j], name);
435 }
436
437 globfree(&gl);
438
439 return 0;
440 }
441
442 static int scan_module_folders(void)
443 {
444 int rv = 0;
445 char **p;
446
447 if (init_module_folders())
448 return -1;
449
450 for (p = module_folders; *p; p++)
451 rv |= scan_module_folder(*p);
452
453 return rv;
454 }
455
456 static int print_modinfo(char *module)
457 {
458 int fd = open(module, O_RDONLY);
459 unsigned int offset, size;
460 struct stat s;
461 char *map = MAP_FAILED, *strings;
462 int rv = -1;
463
464 if (fd < 0) {
465 ULOG_ERR("failed to open %s\n", module);
466 goto out;
467 }
468
469 if (fstat(fd, &s) == -1) {
470 ULOG_ERR("failed to stat %s\n", module);
471 goto out;
472 }
473
474 map = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
475 if (map == MAP_FAILED) {
476 ULOG_ERR("failed to mmap %s\n", module);
477 goto out;
478 }
479
480 if (elf_find_section(map, ".modinfo", &offset, &size)) {
481 ULOG_ERR("failed to load the .modinfo section from %s\n", module);
482 goto out;
483 }
484
485 strings = map + offset;
486 printf("module:\t\t%s\n", module);
487 while (true) {
488 char *dup = NULL;
489 char *sep;
490
491 while (!strings[0])
492 strings++;
493 if (strings >= map + offset + size)
494 break;
495 sep = strstr(strings, "=");
496 if (!sep)
497 break;
498 dup = strndup(strings, sep - strings);
499 sep++;
500 if (strncmp(strings, "parm", 4)) {
501 if (strlen(dup) < 7)
502 printf("%s:\t\t%s\n", dup, sep);
503 else
504 printf("%s:\t%s\n", dup, sep);
505 }
506 strings = &sep[strlen(sep)];
507 if (dup)
508 free(dup);
509 }
510
511 rv = 0;
512
513 out:
514 if (map != MAP_FAILED)
515 munmap(map, s.st_size);
516
517 if (fd >= 0)
518 close(fd);
519
520 return rv;
521 }
522
523 static int deps_available(struct module *m, int verbose)
524 {
525 char *dep;
526 int err = 0;
527
528 if (!m->depends || !strcmp(m->depends, "-") || !strcmp(m->depends, ""))
529 return 0;
530
531 dep = m->depends;
532
533 while (*dep) {
534 m = find_module(dep);
535
536 if (verbose && !m)
537 ULOG_ERR("missing dependency %s\n", dep);
538 if (verbose && m && (m->state != LOADED))
539 ULOG_ERR("dependency not loaded %s\n", dep);
540 if (!m || (m->state != LOADED))
541 err++;
542 dep += strlen(dep) + 1;
543 }
544
545 return err;
546 }
547
548 static int insert_module(char *path, const char *options)
549 {
550 void *data = 0;
551 struct stat s;
552 int fd, ret = -1;
553
554 if (stat(path, &s)) {
555 ULOG_ERR("missing module %s\n", path);
556 return ret;
557 }
558
559 fd = open(path, O_RDONLY);
560 if (fd < 0) {
561 ULOG_ERR("cannot open %s\n", path);
562 return ret;
563 }
564
565 data = malloc(s.st_size);
566 if (!data)
567 goto out;
568
569 if (read(fd, data, s.st_size) == s.st_size) {
570 ret = syscall(__NR_init_module, data, (unsigned long) s.st_size, options);
571 if (errno == EEXIST)
572 ret = 0;
573 }
574 else
575 ULOG_ERR("failed to read full module %s\n", path);
576
577 out:
578 close(fd);
579 free(data);
580
581 return ret;
582 }
583
584 static void load_moddeps(struct module *_m)
585 {
586 char *dep;
587 struct module *m;
588
589 if (!strcmp(_m->depends, "-") || !strcmp(_m->depends, ""))
590 return;
591
592 dep = _m->depends;
593
594 while (*dep) {
595 m = find_module(dep);
596
597 if (!m)
598 ULOG_ERR("failed to find dependency %s\n", dep);
599 if (m && (m->state != LOADED)) {
600 m->state = PROBE;
601 load_moddeps(m);
602 }
603
604 dep = dep + strlen(dep) + 1;
605 }
606 }
607
608 static int iterations = 0;
609 static int load_modprobe(void)
610 {
611 int loaded, todo;
612 struct module_node *mn;
613 struct module *m;
614
615 avl_for_each_element(&modules, mn, avl) {
616 if (mn->is_alias)
617 continue;
618 m = mn->m;
619 if (m->state == PROBE)
620 load_moddeps(m);
621 }
622
623 do {
624 loaded = 0;
625 todo = 0;
626 avl_for_each_element(&modules, mn, avl) {
627 if (mn->is_alias)
628 continue;
629 m = mn->m;
630 if ((m->state == PROBE) && (!deps_available(m, 0))) {
631 if (!insert_module(get_module_path(m->name), (m->opts) ? (m->opts) : (""))) {
632 m->state = LOADED;
633 m->error = 0;
634 loaded++;
635 continue;
636 }
637 m->error = 1;
638 }
639
640 if ((m->state == PROBE) || m->error)
641 todo++;
642 }
643 iterations++;
644 } while (loaded);
645
646 return todo;
647 }
648
649 static int print_insmod_usage(void)
650 {
651 ULOG_INFO("Usage:\n\tinsmod filename [args]\n");
652
653 return -1;
654 }
655
656 static int print_modprobe_usage(void)
657 {
658 ULOG_INFO("Usage:\n\tmodprobe [-q] filename\n");
659
660 return -1;
661 }
662
663 static int print_usage(char *arg)
664 {
665 ULOG_INFO("Usage:\n\t%s module\n", arg);
666
667 return -1;
668 }
669
670 static int main_insmod(int argc, char **argv)
671 {
672 char *name, *cur, *options;
673 int i, ret, len;
674
675 if (argc < 2)
676 return print_insmod_usage();
677
678 name = get_module_name(argv[1]);
679 if (!name) {
680 ULOG_ERR("cannot find module - %s\n", argv[1]);
681 return -1;
682 }
683
684 if (scan_loaded_modules())
685 return -1;
686
687 if (find_module(name)) {
688 ULOG_ERR("module is already loaded - %s\n", name);
689 return -1;
690
691 }
692
693 free_modules();
694
695 for (len = 0, i = 2; i < argc; i++)
696 len += strlen(argv[i]) + 1;
697
698 options = malloc(len);
699 if (!options) {
700 ret = -1;
701 goto err;
702 }
703
704 options[0] = 0;
705 cur = options;
706 for (i = 2; i < argc; i++) {
707 if (options[0]) {
708 *cur = ' ';
709 cur++;
710 }
711 cur += sprintf(cur, "%s", argv[i]);
712 }
713
714 if (init_module_folders()) {
715 fprintf(stderr, "Failed to find the folder holding the modules\n");
716 ret = -1;
717 goto err;
718 }
719
720 if (get_module_path(argv[1])) {
721 name = argv[1];
722 } else if (!get_module_path(name)) {
723 fprintf(stderr, "Failed to find %s. Maybe it is a built in module ?\n", name);
724 ret = -1;
725 goto err;
726 }
727
728 ret = insert_module(get_module_path(name), options);
729 if (ret)
730 ULOG_ERR("failed to insert %s\n", get_module_path(name));
731
732 err:
733 free(options);
734 return ret;
735 }
736
737 static int main_rmmod(int argc, char **argv)
738 {
739 struct module *m;
740 char *name;
741 int ret;
742
743 if (argc != 2)
744 return print_usage("rmmod");
745
746 if (scan_loaded_modules())
747 return -1;
748
749 name = get_module_name(argv[1]);
750 m = find_module(name);
751 if (!m) {
752 ULOG_ERR("module is not loaded\n");
753 return -1;
754 }
755 ret = syscall(__NR_delete_module, m->name, 0);
756
757 if (ret)
758 ULOG_ERR("unloading the module failed\n");
759
760 free_modules();
761
762 return ret;
763 }
764
765 static int main_lsmod(int argc, char **argv)
766 {
767 struct module_node *mn;
768 struct module *m;
769 char *dep;
770
771 if (scan_loaded_modules())
772 return -1;
773
774 avl_for_each_element(&modules, mn, avl) {
775 if (mn->is_alias)
776 continue;
777 m = mn->m;
778 if (m->state == LOADED) {
779 printf("%-20s%8d%3d ",
780 m->name, m->size, m->usage);
781 if (m->depends && strcmp(m->depends, "-") && strcmp(m->depends, "")) {
782 dep = m->depends;
783 while (*dep) {
784 printf("%s", dep);
785 dep = dep + strlen(dep) + 1;
786 if (*dep)
787 printf(",");
788 }
789 }
790 printf("\n");
791 }
792 }
793
794 free_modules();
795
796 return 0;
797 }
798
799 static int main_modinfo(int argc, char **argv)
800 {
801 struct module *m;
802 char *name;
803
804 if (argc != 2)
805 return print_usage("modinfo");
806
807 if (scan_module_folders())
808 return -1;
809
810 name = get_module_name(argv[1]);
811 m = find_module(name);
812 if (!m) {
813 ULOG_ERR("cannot find module - %s\n", argv[1]);
814 return -1;
815 }
816
817 name = get_module_path(m->name);
818 if (!name) {
819 ULOG_ERR("cannot find path of module - %s\n", m->name);
820 return -1;
821 }
822
823 print_modinfo(name);
824
825 return 0;
826 }
827
828 static int main_modprobe(int argc, char **argv)
829 {
830 struct module_node *mn;
831 struct module *m;
832 char *name;
833 char *mod = NULL;
834 int opt;
835 bool quiet = false;
836
837 while ((opt = getopt(argc, argv, "q")) != -1 ) {
838 switch (opt) {
839 case 'q': /* shhhh! */
840 quiet = true;
841 break;
842 default: /* '?' */
843 return print_modprobe_usage();
844 break;
845 }
846 }
847
848 if (optind >= argc)
849 return print_modprobe_usage(); /* expected module after options */
850
851 mod = argv[optind];
852
853 if (scan_module_folders())
854 return -1;
855
856 if (scan_loaded_modules())
857 return -1;
858
859 name = get_module_name(mod);
860 m = find_module(name);
861 if (m && m->state == LOADED) {
862 if (!quiet)
863 ULOG_ERR("%s is already loaded\n", name);
864 return 0;
865 } else if (!m) {
866 if (!quiet)
867 ULOG_ERR("failed to find a module named %s\n", name);
868 return -1;
869 } else {
870 int fail;
871
872 m->state = PROBE;
873
874 fail = load_modprobe();
875
876 if (fail) {
877 ULOG_ERR("%d module%s could not be probed\n",
878 fail, (fail == 1) ? ("") : ("s"));
879
880 avl_for_each_element(&modules, mn, avl) {
881 if (mn->is_alias)
882 continue;
883 m = mn->m;
884 if ((m->state == PROBE) || m->error)
885 ULOG_ERR("- %s\n", m->name);
886 }
887 }
888 }
889
890 free_modules();
891
892 return 0;
893 }
894
895 static int main_loader(int argc, char **argv)
896 {
897 int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
898 char *dir = "/etc/modules.d/";
899 struct module_node *mn;
900 struct module *m;
901 glob_t gl;
902 char *path;
903 int fail, j;
904
905 if (argc > 1)
906 dir = argv[1];
907
908 path = malloc(strlen(dir) + 2);
909 if (!path)
910 return -1;
911
912 strcpy(path, dir);
913 strcat(path, "*");
914
915 if (scan_module_folders()) {
916 free (path);
917 return -1;
918 }
919
920 if (scan_loaded_modules()) {
921 free (path);
922 return -1;
923 }
924
925 ULOG_INFO("loading kernel modules from %s\n", path);
926
927 if (glob(path, gl_flags, NULL, &gl) < 0)
928 goto out;
929
930 for (j = 0; j < gl.gl_pathc; j++) {
931 FILE *fp = fopen(gl.gl_pathv[j], "r");
932 size_t mod_len = 0;
933 char *mod = NULL;
934
935 if (!fp) {
936 ULOG_ERR("failed to open %s\n", gl.gl_pathv[j]);
937 continue;
938 }
939
940 while (getline(&mod, &mod_len, fp) > 0) {
941 char *nl = strchr(mod, '\n');
942 struct module *m;
943 char *opts;
944
945 if (nl)
946 *nl = '\0';
947
948 opts = strchr(mod, ' ');
949 if (opts)
950 *opts++ = '\0';
951
952 m = find_module(get_module_name(mod));
953 if (!m || (m->state == LOADED))
954 continue;
955
956 if (opts)
957 m->opts = strdup(opts);
958 m->state = PROBE;
959 if (basename(gl.gl_pathv[j])[0] - '0' <= 9)
960 load_modprobe();
961
962 }
963 free(mod);
964 fclose(fp);
965 }
966
967 fail = load_modprobe();
968
969 if (fail) {
970 ULOG_ERR("%d module%s could not be probed\n",
971 fail, (fail == 1) ? ("") : ("s"));
972
973 avl_for_each_element(&modules, mn, avl) {
974 if (mn->is_alias)
975 continue;
976 m = mn->m;
977 if ((m->state == PROBE) || (m->error))
978 ULOG_ERR("- %s - %d\n", m->name, deps_available(m, 1));
979 }
980 } else {
981 ULOG_INFO("done loading kernel modules from %s\n", path);
982 }
983
984 out:
985 globfree(&gl);
986 free(path);
987
988 return 0;
989 }
990
991 static inline char weight(char c)
992 {
993 return c == '_' ? '-' : c;
994 }
995
996 static int avl_modcmp(const void *k1, const void *k2, void *ptr)
997 {
998 const char *s1 = k1;
999 const char *s2 = k2;
1000
1001 while (*s1 && (weight(*s1) == weight(*s2)))
1002 {
1003 s1++;
1004 s2++;
1005 }
1006
1007 return (unsigned char)weight(*s1) - (unsigned char)weight(*s2);
1008 }
1009
1010 int main(int argc, char **argv)
1011 {
1012 char *exec = basename(*argv);
1013
1014 avl_init(&modules, avl_modcmp, false, NULL);
1015 if (!strcmp(exec, "insmod"))
1016 return main_insmod(argc, argv);
1017
1018 if (!strcmp(exec, "rmmod"))
1019 return main_rmmod(argc, argv);
1020
1021 if (!strcmp(exec, "lsmod"))
1022 return main_lsmod(argc, argv);
1023
1024 if (!strcmp(exec, "modinfo"))
1025 return main_modinfo(argc, argv);
1026
1027 if (!strcmp(exec, "modprobe"))
1028 return main_modprobe(argc, argv);
1029
1030 ulog_open(ULOG_KMSG, LOG_USER, "kmodloader");
1031 return main_loader(argc, argv);
1032 }
OpenWrt core utilities