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 <syslog.h>
  31 #include <libgen.h>
  32 #include <glob.h>
  33 #include <elf.h>
  34
  35 #include <libubox/avl.h>
  36 #include <libubox/avl-cmp.h>
  37 #include <libubox/utils.h>
  38 #include <libubox/ulog.h>
  39
  40 #define DEF_MOD_PATH "/modules/%s/"
  41
  42 enum {
  43         SCANNED,
  44         PROBE,
  45         LOADED,
  46 };
  47
  48 struct module {
  49         struct avl_node avl;
  50
  51         char *name;
  52         char *depends;
  53         char *opts;
  54
  55         int size;
  56         int usage;
  57         int state;
  58         int error;
  59 };
  60
  61 static struct avl_tree modules;
  62
  63 static char **module_folders = NULL;
  64
  65 static int init_module_folders(void)
  66 {
  67         int n = 0;
  68         struct stat st;
  69         struct utsname ver;
  70         char *s, *e, *p, path[256], ldpath[256];
  71
  72         e = ldpath;
  73         s = getenv("LD_LIBRARY_PATH");
  74
  75         if (s)
  76                 e += snprintf(ldpath, sizeof(ldpath), "%s:", s);
  77
  78         e += snprintf(e, sizeof(ldpath) - (e - ldpath), "/lib");
  79
  80         uname(&ver);
  81
  82         for (s = p = ldpath; p <= e; p++) {
  83                 if (*p != ':' && *p != '\0')
  84                         continue;
  85
  86                 *p = 0;
  87                 snprintf(path, sizeof(path), "%s" DEF_MOD_PATH, s, ver.release);
  88
  89                 if (!stat(path, &st) && S_ISDIR(st.st_mode)) {
  90                         module_folders = realloc(module_folders, sizeof(p) * (n + 2));
  91
  92                         if (!module_folders)
  93                                 return -1;
  94
  95                         module_folders[n++] = strdup(path);
  96                 }
  97
  98                 s = p + 1;
  99         }
 100
 101         if (!module_folders)
 102                 return -1;
 103
 104         module_folders[n] = NULL;
 105         return 0;
 106 }
 107
 108 static struct module *find_module(const char *name)
 109 {
 110         struct module *m;
 111         return avl_find_element(&modules, name, m, avl);
 112 }
 113
 114 static void free_modules(void)
 115 {
 116         struct module *m, *tmp;
 117
 118         avl_remove_all_elements(&modules, m, avl, tmp)
 119                 free(m);
 120 }
 121
 122 static char* get_module_path(char *name)
 123 {
 124         char **p;
 125         static char path[256];
 126         struct stat s;
 127
 128         if (!stat(name, &s) && S_ISREG(s.st_mode))
 129                 return name;
 130
 131         for (p = module_folders; *p; p++) {
 132                 snprintf(path, sizeof(path), "%s%s.ko", *p, name);
 133                 if (!stat(path, &s) && S_ISREG(s.st_mode))
 134                         return path;
 135         }
 136
 137         return NULL;
 138 }
 139
 140 static char* get_module_name(char *path)
 141 {
 142         static char name[32];
 143         char *t;
 144
 145         strncpy(name, basename(path), sizeof(name));
 146
 147         t = strstr(name, ".ko");
 148         if (t)
 149                 *t = '\0';
 150
 151         return name;
 152 }
 153
 154 static int elf64_find_section(char *map, const char *section, unsigned int *offset, unsigned int *size)
 155 {
 156         const char *secnames;
 157         Elf64_Ehdr *e;
 158         Elf64_Shdr *sh;
 159         int i;
 160
 161         e = (Elf64_Ehdr *) map;
 162         sh = (Elf64_Shdr *) (map + e->e_shoff);
 163
 164         secnames = map + sh[e->e_shstrndx].sh_offset;
 165         for (i = 0; i < e->e_shnum; i++) {
 166                 if (!strcmp(section, secnames + sh[i].sh_name)) {
 167                         *size = sh[i].sh_size;
 168                         *offset = sh[i].sh_offset;
 169                         return 0;
 170                 }
 171         }
 172
 173         return -1;
 174 }
 175
 176 static int elf32_find_section(char *map, const char *section, unsigned int *offset, unsigned int *size)
 177 {
 178         const char *secnames;
 179         Elf32_Ehdr *e;
 180         Elf32_Shdr *sh;
 181         int i;
 182
 183         e = (Elf32_Ehdr *) map;
 184         sh = (Elf32_Shdr *) (map + e->e_shoff);
 185
 186         secnames = map + sh[e->e_shstrndx].sh_offset;
 187         for (i = 0; i < e->e_shnum; i++) {
 188                 if (!strcmp(section, secnames + sh[i].sh_name)) {
 189                         *size = sh[i].sh_size;
 190                         *offset = sh[i].sh_offset;
 191                         return 0;
 192                 }
 193         }
 194
 195         return -1;
 196 }
 197
 198 static int elf_find_section(char *map, const char *section, unsigned int *offset, unsigned int *size)
 199 {
 200         int clazz = map[EI_CLASS];
 201
 202         if (clazz == ELFCLASS32)
 203                 return elf32_find_section(map, section, offset, size);
 204         else if (clazz == ELFCLASS64)
 205                 return elf64_find_section(map, section, offset, size);
 206
 207         ULOG_ERR("unknown elf format %d\n", clazz);
 208
 209         return -1;
 210 }
 211
 212 static struct module *
 213 alloc_module(const char *name, const char *depends, int size)
 214 {
 215         struct module *m;
 216         char *_name, *_dep;
 217
 218         m = calloc_a(sizeof(*m),
 219                 &_name, strlen(name) + 1,
 220                 &_dep, depends ? strlen(depends) + 2 : 0);
 221         if (!m)
 222                 return NULL;
 223
 224         m->avl.key = m->name = strcpy(_name, name);
 225         m->opts = 0;
 226
 227         if (depends) {
 228                 m->depends = strcpy(_dep, depends);
 229                 while (*_dep) {
 230                         if (*_dep == ',')
 231                                 *_dep = '\0';
 232                         _dep++;
 233                 }
 234         }
 235
 236         m->size = size;
 237         avl_insert(&modules, &m->avl);
 238
 239         return m;
 240 }
 241
 242 static int scan_loaded_modules(void)
 243 {
 244         size_t buf_len = 0;
 245         char *buf = NULL;
 246         FILE *fp;
 247
 248         fp = fopen("/proc/modules", "r");
 249         if (!fp) {
 250                 ULOG_ERR("failed to open /proc/modules\n");
 251                 return -1;
 252         }
 253
 254         while (getline(&buf, &buf_len, fp) > 0) {
 255                 struct module m;
 256                 struct module *n;
 257
 258                 m.name = strtok(buf, " ");
 259                 m.size = atoi(strtok(NULL, " "));
 260                 m.usage = atoi(strtok(NULL, " "));
 261                 m.depends = strtok(NULL, " ");
 262
 263                 if (!m.name || !m.depends)
 264                         continue;
 265
 266                 n = alloc_module(m.name, m.depends, m.size);
 267                 n->usage = m.usage;
 268                 n->state = LOADED;
 269         }
 270         free(buf);
 271         fclose(fp);
 272
 273         return 0;
 274 }
 275
 276 static struct module* get_module_info(const char *module, const char *name)
 277 {
 278         int fd = open(module, O_RDONLY);
 279         unsigned int offset, size;
 280         char *map, *strings, *dep = NULL;
 281         struct module *m;
 282         struct stat s;
 283
 284         if (!fd) {
 285                 ULOG_ERR("failed to open %s\n", module);
 286                 return NULL;
 287         }
 288
 289         if (fstat(fd, &s) == -1) {
 290                 ULOG_ERR("failed to stat %s\n", module);
 291                 return NULL;
 292         }
 293
 294         map = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
 295         if (map == MAP_FAILED) {
 296                 ULOG_ERR("failed to mmap %s\n", module);
 297                 return NULL;
 298         }
 299
 300         if (elf_find_section(map, ".modinfo", &offset, &size)) {
 301                 ULOG_ERR("failed to load the .modinfo section from %s\n", module);
 302                 return NULL;
 303         }
 304
 305         strings = map + offset;
 306         while (strings && (strings < map + offset + size)) {
 307                 char *sep;
 308                 int len;
 309
 310                 while (!strings[0])
 311                         strings++;
 312                 sep = strstr(strings, "=");
 313                 if (!sep)
 314                         break;
 315                 len = sep - strings;
 316                 sep++;
 317                 if (!strncmp(strings, "depends=", len + 1))
 318                         dep = sep;
 319                 strings = &sep[strlen(sep)];
 320         }
 321
 322         m = alloc_module(name, dep, s.st_size);
 323         if (!m)
 324                 return NULL;
 325
 326         m->state = SCANNED;
 327
 328         return m;
 329 }
 330
 331 static int scan_module_folder(const char *dir)
 332 {
 333         int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
 334         struct utsname ver;
 335         char *path;
 336         glob_t gl;
 337         int j;
 338
 339         uname(&ver);
 340         path = alloca(strlen(dir) + sizeof("*.ko") + 1);
 341         sprintf(path, "%s*.ko", dir);
 342
 343         if (glob(path, gl_flags, NULL, &gl) < 0)
 344                 return -1;
 345
 346         for (j = 0; j < gl.gl_pathc; j++) {
 347                 char *name = get_module_name(gl.gl_pathv[j]);
 348                 struct module *m;
 349
 350                 if (!name)
 351                         continue;
 352
 353                 m = find_module(name);
 354                 if (!m)
 355                         get_module_info(gl.gl_pathv[j], name);
 356         }
 357
 358         globfree(&gl);
 359
 360         return 0;
 361 }
 362
 363 static int scan_module_folders(void)
 364 {
 365         int rv = 0;
 366         char **p;
 367
 368         if (init_module_folders())
 369                 return -1;
 370
 371         for (p = module_folders; *p; p++)
 372                 rv |= scan_module_folder(*p);
 373
 374         return rv;
 375 }
 376
 377 static int print_modinfo(char *module)
 378 {
 379         int fd = open(module, O_RDONLY);
 380         unsigned int offset, size;
 381         struct stat s;
 382         char *map, *strings;
 383
 384         if (!fd) {
 385                 ULOG_ERR("failed to open %s\n", module);
 386                 return -1;
 387         }
 388
 389         if (fstat(fd, &s) == -1) {
 390                 ULOG_ERR("failed to stat %s\n", module);
 391                 return -1;
 392         }
 393
 394         map = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
 395         if (map == MAP_FAILED) {
 396                 ULOG_ERR("failed to mmap %s\n", module);
 397                 return -1;
 398         }
 399
 400         if (elf_find_section(map, ".modinfo", &offset, &size)) {
 401                 ULOG_ERR("failed to load the .modinfo section from %s\n", module);
 402                 return -1;
 403         }
 404
 405         strings = map + offset;
 406         printf("module:\t\t%s\n", module);
 407         while (strings && (strings < map + offset + size)) {
 408                 char *dup = NULL;
 409                 char *sep;
 410
 411                 while (!strings[0])
 412                         strings++;
 413                 sep = strstr(strings, "=");
 414                 if (!sep)
 415                         break;
 416                 dup = strndup(strings, sep - strings);
 417                 sep++;
 418                 if (strncmp(strings, "parm", 4)) {
 419                         if (strlen(dup) < 7)
 420                                 printf("%s:\t\t%s\n",  dup, sep);
 421                         else
 422                                 printf("%s:\t%s\n",  dup, sep);
 423                 }
 424                 strings = &sep[strlen(sep)];
 425                 if (dup)
 426                         free(dup);
 427         }
 428
 429         return 0;
 430 }
 431
 432 static int deps_available(struct module *m, int verbose)
 433 {
 434         char *dep;
 435         int err = 0;
 436
 437         if (!strcmp(m->depends, "-") || !strcmp(m->depends, ""))
 438                 return 0;
 439
 440         dep = m->depends;
 441
 442         while (*dep) {
 443                 m = find_module(dep);
 444
 445                 if (verbose && !m)
 446                         ULOG_ERR("missing dependency %s\n", dep);
 447                 if (verbose && m && (m->state != LOADED))
 448                         ULOG_ERR("dependency not loaded %s\n", dep);
 449                 if (!m || (m->state != LOADED))
 450                         err++;
 451                 dep += strlen(dep) + 1;
 452         }
 453
 454         return err;
 455 }
 456
 457 static int insert_module(char *path, const char *options)
 458 {
 459         void *data = 0;
 460         struct stat s;
 461         int fd, ret = -1;
 462
 463         if (stat(path, &s)) {
 464                 ULOG_ERR("missing module %s\n", path);
 465                 return ret;
 466         }
 467
 468         fd = open(path, O_RDONLY);
 469         if (!fd) {
 470                 ULOG_ERR("cannot open %s\n", path);
 471                 return ret;
 472         }
 473
 474         data = malloc(s.st_size);
 475         if (read(fd, data, s.st_size) == s.st_size)
 476                 ret = syscall(__NR_init_module, data, (unsigned long) s.st_size, options);
 477         else
 478                 ULOG_ERR("failed to read full module %s\n", path);
 479
 480         close(fd);
 481         free(data);
 482
 483         return ret;
 484 }
 485
 486 static void load_moddeps(struct module *_m)
 487 {
 488         char *dep;
 489         struct module *m;
 490
 491         if (!strcmp(_m->depends, "-") || !strcmp(_m->depends, ""))
 492                 return;
 493
 494         dep = _m->depends;
 495
 496         while (*dep) {
 497                 m = find_module(dep);
 498
 499                 if (!m)
 500                         ULOG_ERR("failed to find dependency %s\n", dep);
 501                 if (m && (m->state != LOADED)) {
 502                         m->state = PROBE;
 503                         load_moddeps(m);
 504                 }
 505
 506                 dep = dep + strlen(dep) + 1;
 507         }
 508 }
 509
 510 static int iterations = 0;
 511 static int load_modprobe(void)
 512 {
 513         int loaded, todo;
 514         struct module *m;
 515
 516         avl_for_each_element(&modules, m, avl)
 517                 if (m->state == PROBE)
 518                         load_moddeps(m);
 519
 520         do {
 521                 loaded = 0;
 522                 todo = 0;
 523                 avl_for_each_element(&modules, m, avl) {
 524                         if ((m->state == PROBE) && (!deps_available(m, 0))) {
 525                                 if (!insert_module(get_module_path(m->name), (m->opts) ? (m->opts) : (""))) {
 526                                         m->state = LOADED;
 527                                         m->error = 0;
 528                                         loaded++;
 529                                         continue;
 530                                 }
 531                                 m->error = 1;
 532                         }
 533
 534                         if ((m->state == PROBE) || m->error)
 535                                 todo++;
 536                 }
 537                 iterations++;
 538         } while (loaded);
 539
 540         return todo;
 541 }
 542
 543 static int print_insmod_usage(void)
 544 {
 545         ULOG_INFO("Usage:\n\tinsmod filename [args]\n");
 546
 547         return -1;
 548 }
 549
 550 static int print_usage(char *arg)
 551 {
 552         ULOG_INFO("Usage:\n\t%s module\n", arg);
 553
 554         return -1;
 555 }
 556
 557 static int main_insmod(int argc, char **argv)
 558 {
 559         char *name, *cur, *options;
 560         int i, ret, len;
 561
 562         if (argc < 2)
 563                 return print_insmod_usage();
 564
 565         name = get_module_name(argv[1]);
 566         if (!name) {
 567                 ULOG_ERR("cannot find module - %s\n", argv[1]);
 568                 return -1;
 569         }
 570
 571         if (scan_loaded_modules())
 572                 return -1;
 573
 574         if (find_module(name)) {
 575                 ULOG_ERR("module is already loaded - %s\n", name);
 576                 return -1;
 577
 578         }
 579
 580         free_modules();
 581
 582         for (len = 0, i = 2; i < argc; i++)
 583                 len += strlen(argv[i]) + 1;
 584
 585         options = malloc(len);
 586         options[0] = 0;
 587         cur = options;
 588         for (i = 2; i < argc; i++) {
 589                 if (options[0]) {
 590                         *cur = ' ';
 591                         cur++;
 592                 }
 593                 cur += sprintf(cur, "%s", argv[i]);
 594         }
 595
 596         init_module_folders();
 597
 598         if (get_module_path(argv[1])) {
 599                 name = argv[1];
 600         } else if (!get_module_path(name)) {
 601                 fprintf(stderr, "Failed to find %s. Maybe it is a built in module ?\n", name);
 602                 return -1;
 603         }
 604
 605         ret = insert_module(get_module_path(name), options);
 606         free(options);
 607
 608         if (ret)
 609                 ULOG_ERR("failed to insert %s\n", get_module_path(name));
 610
 611         return ret;
 612 }
 613
 614 static int main_rmmod(int argc, char **argv)
 615 {
 616         struct module *m;
 617         char *name;
 618         int ret;
 619
 620         if (argc != 2)
 621                 return print_usage("rmmod");
 622
 623         if (scan_loaded_modules())
 624                 return -1;
 625
 626         name = get_module_name(argv[1]);
 627         m = find_module(name);
 628         if (!m) {
 629                 ULOG_ERR("module is not loaded\n");
 630                 return -1;
 631         }
 632         ret = syscall(__NR_delete_module, m->name, 0);
 633
 634         if (ret)
 635                 ULOG_ERR("unloading the module failed\n");
 636
 637         free_modules();
 638
 639         return ret;
 640 }
 641
 642 static int main_lsmod(int argc, char **argv)
 643 {
 644         struct module *m;
 645
 646         if (scan_loaded_modules())
 647                 return -1;
 648
 649         avl_for_each_element(&modules, m, avl)
 650                 if (m->state == LOADED)
 651                         printf("%-20s%8d%3d %s\n",
 652                                 m->name, m->size, m->usage,
 653                                 (*m->depends == '-') ? ("") : (m->depends));
 654
 655         free_modules();
 656
 657         return 0;
 658 }
 659
 660 static int main_modinfo(int argc, char **argv)
 661 {
 662         struct module *m;
 663         char *name;
 664
 665         if (argc != 2)
 666                 return print_usage("modinfo");
 667
 668         if (scan_module_folders())
 669                 return -1;
 670
 671         name = get_module_name(argv[1]);
 672         m = find_module(name);
 673         if (!m) {
 674                 ULOG_ERR("cannot find module - %s\n", argv[1]);
 675                 return -1;
 676         }
 677
 678         name = get_module_path(m->name);
 679         if (!name) {
 680                 ULOG_ERR("cannot find path of module - %s\n", m->name);
 681                 return -1;
 682         }
 683
 684         print_modinfo(name);
 685
 686         return 0;
 687 }
 688
 689 static int main_modprobe(int argc, char **argv)
 690 {
 691         struct module *m;
 692         char *name;
 693
 694         if (argc != 2)
 695                 return print_usage("modprobe");
 696
 697         if (scan_loaded_modules())
 698                 return -1;
 699
 700         if (scan_module_folders())
 701                 return -1;
 702
 703         name = get_module_name(argv[1]);
 704         m = find_module(name);
 705         if (m && m->state == LOADED) {
 706                 ULOG_ERR("%s is already loaded\n", name);
 707                 return -1;
 708         } else if (!m) {
 709                 ULOG_ERR("failed to find a module named %s\n", name);
 710         } else {
 711                 int fail;
 712
 713                 m->state = PROBE;
 714
 715                 fail = load_modprobe();
 716
 717                 if (fail) {
 718                         ULOG_ERR("%d module%s could not be probed\n",
 719                                  fail, (fail == 1) ? ("") : ("s"));
 720
 721                         avl_for_each_element(&modules, m, avl)
 722                                 if ((m->state == PROBE) || m->error)
 723                                         ULOG_ERR("- %s\n", m->name);
 724                 }
 725         }
 726
 727         free_modules();
 728
 729         return 0;
 730 }
 731
 732 static int main_loader(int argc, char **argv)
 733 {
 734         int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
 735         char *dir = "/etc/modules.d/*";
 736         struct module *m;
 737         glob_t gl;
 738         char *path;
 739         int fail, j;
 740
 741         if (argc > 1)
 742                 dir = argv[1];
 743
 744         path = malloc(strlen(dir) + 2);
 745         strcpy(path, dir);
 746         strcat(path, "*");
 747
 748         if (scan_loaded_modules())
 749                 return -1;
 750
 751         if (scan_module_folders())
 752                 return -1;
 753
 754         syslog(LOG_INFO, "kmodloader: loading kernel modules from %s\n", path);
 755
 756         if (glob(path, gl_flags, NULL, &gl) < 0)
 757                 goto out;
 758
 759         for (j = 0; j < gl.gl_pathc; j++) {
 760                 FILE *fp = fopen(gl.gl_pathv[j], "r");
 761                 size_t mod_len = 0;
 762                 char *mod = NULL;
 763
 764                 if (!fp) {
 765                         ULOG_ERR("failed to open %s\n", gl.gl_pathv[j]);
 766                         continue;
 767                 }
 768
 769                 while (getline(&mod, &mod_len, fp) > 0) {
 770                         char *nl = strchr(mod, '\n');
 771                         struct module *m;
 772                         char *opts;
 773
 774                         if (nl)
 775                                 *nl = '\0';
 776
 777                         opts = strchr(mod, ' ');
 778                         if (opts)
 779                                 *opts++ = '\0';
 780
 781                         m = find_module(get_module_name(mod));
 782                         if (!m || (m->state == LOADED))
 783                                 continue;
 784
 785                         if (opts)
 786                                 m->opts = strdup(opts);
 787                         m->state = PROBE;
 788                         if (basename(gl.gl_pathv[j])[0] - '0' <= 9)
 789                                 load_modprobe();
 790
 791                 }
 792                 free(mod);
 793                 fclose(fp);
 794         }
 795
 796         fail = load_modprobe();
 797
 798         if (fail) {
 799                 ULOG_ERR("%d module%s could not be probed\n",
 800                          fail, (fail == 1) ? ("") : ("s"));
 801
 802                 avl_for_each_element(&modules, m, avl)
 803                         if ((m->state == PROBE) || (m->error))
 804                                 ULOG_ERR("- %s - %d\n", m->name, deps_available(m, 1));
 805         }
 806
 807 out:
 808         globfree(&gl);
 809         free(path);
 810
 811         return 0;
 812 }
 813
 814 static int avl_modcmp(const void *k1, const void *k2, void *ptr)
 815 {
 816         const char *s1 = k1;
 817         const char *s2 = k2;
 818
 819         while (*s1 && ((*s1 == *s2) ||
 820                        ((*s1 == '_') && (*s2 == '-')) ||
 821                        ((*s1 == '-') && (*s2 == '_'))))
 822         {
 823                 s1++;
 824                 s2++;
 825         }
 826
 827         return *(const unsigned char *)s1 - *(const unsigned char *)s2;
 828 }
 829
 830 int main(int argc, char **argv)
 831 {
 832         char *exec = basename(*argv);
 833
 834         avl_init(&modules, avl_modcmp, false, NULL);
 835         if (!strcmp(exec, "insmod"))
 836                 return main_insmod(argc, argv);
 837
 838         if (!strcmp(exec, "rmmod"))
 839                 return main_rmmod(argc, argv);
 840
 841         if (!strcmp(exec, "lsmod"))
 842                 return main_lsmod(argc, argv);
 843
 844         if (!strcmp(exec, "modinfo"))
 845                 return main_modinfo(argc, argv);
 846
 847         if (!strcmp(exec, "modprobe"))
 848                 return main_modprobe(argc, argv);
 849
 850         return main_loader(argc, argv);
 851 }