package/busybox/patches/470-insmod_search.patch

   1 Index: busybox-1.7.2/modutils/insmod.c
   2 ===================================================================
   3 --- busybox-1.7.2.orig/modutils/insmod.c        2007-10-30 15:34:59.000000000 -0500
   4 +++ busybox-1.7.2/modutils/insmod.c     2007-10-30 15:35:05.000000000 -0500
   5 @@ -61,19 +61,114 @@
   6  #include "libbb.h"
   7  #include <libgen.h>
   8  #include <sys/utsname.h>
   9 +#if ENABLE_FEATURE_2_6_MODULES
  10 +#include <sys/mman.h>
  11 +#include <asm/unistd.h>
  12 +#include <sys/syscall.h>
  13 +#endif
  14
  15  #if !ENABLE_FEATURE_2_4_MODULES && !ENABLE_FEATURE_2_6_MODULES
  16  #undef ENABLE_FEATURE_2_4_MODULES
  17  #define ENABLE_FEATURE_2_4_MODULES 1
  18  #endif
  19
  20 -#if !ENABLE_FEATURE_2_4_MODULES
  21 -#define insmod_ng_main insmod_main
  22 +#if ENABLE_FEATURE_2_4_MODULES
  23 +int insmod_main_24(int argc, char **argv);
  24  #endif
  25 -
  26  #if ENABLE_FEATURE_2_6_MODULES
  27 -extern int insmod_ng_main( int argc, char **argv);
  28 +int insmod_main_26(int argc, char **argv);
  29  #endif
  30 +int insmod_main(int argc, char **argv);
  31 +
  32 +static char *g_filename = NULL;
  33 +#define _PATH_MODULES  "/lib/modules"
  34 +
  35 +static int check_module_name_match(const char *filename, struct stat *statbuf,
  36 +                                  void *userdata, int depth)
  37 +{
  38 +       char *fullname = (char *) userdata;
  39 +
  40 +       if (fullname[0] == '\0')
  41 +               return FALSE;
  42 +       else {
  43 +               char *tmp, *tmp1 = xstrdup(filename);
  44 +               tmp = bb_get_last_path_component(tmp1);
  45 +               if (strcmp(tmp, fullname) == 0) {
  46 +                       free(tmp1);
  47 +                       /* Stop searching if we find a match */
  48 +                       g_filename = xstrdup(filename);
  49 +                       return FALSE;
  50 +               }
  51 +               free(tmp1);
  52 +       }
  53 +       return TRUE;
  54 +}
  55 +
  56 +static int find_module(char *filename)
  57 +{
  58 +       char *module_dir, real_module_dir[FILENAME_MAX];
  59 +       int len, slen, ret = ENOENT, k_version;
  60 +       struct utsname myuname;
  61 +       const char *suffix;
  62 +       struct stat st;
  63 +
  64 +       /* check the kernel version */
  65 +       if ((uname(&myuname) != 0) || (myuname.release[0] != '2'))
  66 +               return EINVAL;
  67 +
  68 +       k_version = myuname.release[2] - '0';
  69 +#if ENABLE_FEATURE_2_4_MODULES
  70 +       if (k_version <= 4)
  71 +               suffix = ".o";
  72 +       else
  73 +#endif
  74 +               suffix = ".ko";
  75 +
  76 +       len = strlen(filename);
  77 +       slen = strlen(suffix);
  78 +
  79 +       /* check for suffix and absolute path first */
  80 +       if ((len < slen + 2) || (strcmp(filename + len - slen, suffix) != 0)) {
  81 +               filename = xasprintf("%s%s", filename, suffix);
  82 +       } else {
  83 +               filename = strdup(filename);
  84 +               if ((stat(filename, &st) == 0) && S_ISREG(st.st_mode)) {
  85 +                       g_filename = filename;
  86 +                       return 0;
  87 +               }
  88 +               free(filename);
  89 +               return ENOENT;
  90 +       }
  91 +
  92 +       /* next: scan /lib/modules/<release> */
  93 +       /* Jump through hoops in case /lib/modules/`uname -r`
  94 +       * is a symlink.  We do not want recursive_action to
  95 +       * follow symlinks, but we do want to follow the
  96 +       * /lib/modules/`uname -r` dir, So resolve it ourselves
  97 +       * if it is a link... */
  98 +       module_dir = concat_path_file(_PATH_MODULES, myuname.release);
  99 +       if (realpath(module_dir, real_module_dir) != NULL) {
 100 +               free(module_dir);
 101 +               module_dir = real_module_dir;
 102 +       }
 103 +
 104 +       recursive_action(module_dir, ACTION_RECURSE,
 105 +               check_module_name_match, 0, filename, 0);
 106 +
 107 +       /* Check if we have a complete path */
 108 +       if (g_filename == NULL)
 109 +               goto done;
 110 +
 111 +       if ((stat(g_filename, &st) == 0) && S_ISREG(st.st_mode))
 112 +               ret = 0;
 113 +       else
 114 +               free(g_filename);
 115 +
 116 +done:
 117 +       free(filename);
 118 +
 119 +       return ret;
 120 +}
 121
 122
 123  #if ENABLE_FEATURE_2_4_MODULES
 124 @@ -677,7 +772,6 @@
 125  #endif
 126
 127
 128 -#define _PATH_MODULES  "/lib/modules"
 129  enum { STRVERSIONLEN = 64 };
 130
 131  /*======================================================================*/
 132 @@ -790,37 +884,6 @@
 133  static int n_ext_modules_used;
 134  extern int delete_module(const char *);
 135
 136 -static char *m_filename;
 137 -static char *m_fullName;
 138 -
 139 -
 140 -/*======================================================================*/
 141 -
 142 -
 143 -static int check_module_name_match(const char *filename, struct stat *statbuf,
 144 -                               void *userdata, int depth)
 145 -{
 146 -       char *fullname = (char *) userdata;
 147 -
 148 -       if (fullname[0] == '\0')
 149 -               return FALSE;
 150 -       else {
 151 -               char *tmp, *tmp1 = xstrdup(filename);
 152 -               tmp = bb_get_last_path_component(tmp1);
 153 -               if (strcmp(tmp, fullname) == 0) {
 154 -                       free(tmp1);
 155 -                       /* Stop searching if we find a match */
 156 -                       m_filename = xstrdup(filename);
 157 -                       return FALSE;
 158 -               }
 159 -               free(tmp1);
 160 -       }
 161 -       return TRUE;
 162 -}
 163 -
 164 -
 165 -/*======================================================================*/
 166 -
 167  static struct obj_file *arch_new_file(void)
 168  {
 169         struct arch_file *f;
 170 @@ -3952,145 +4015,57 @@
 171  void print_load_map(struct obj_file *f);
 172  #endif
 173
 174 -int insmod_main( int argc, char **argv);
 175 -int insmod_main( int argc, char **argv)
 176 +int insmod_main_24( int argc, char **argv)
 177  {
 178         char *opt_o, *arg1;
 179 -       int len;
 180         int k_crcs;
 181 -       char *tmp, *tmp1;
 182         unsigned long m_size;
 183         ElfW(Addr) m_addr;
 184         struct obj_file *f;
 185 -       struct stat st;
 186 -       char *m_name = 0;
 187 -       int exit_status = EXIT_FAILURE;
 188 +       char *tmp = NULL, *m_name = NULL;
 189 +       int ret = EINVAL;
 190         int m_has_modinfo;
 191  #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
 192         struct utsname uts_info;
 193         char m_strversion[STRVERSIONLEN];
 194         int m_version, m_crcs;
 195  #endif
 196 -#if ENABLE_FEATURE_CLEAN_UP
 197 -       FILE *fp = 0;
 198 -#else
 199 -       FILE *fp;
 200 -#endif
 201 -       int k_version = 0;
 202 +       FILE *fp = NULL;
 203 +       int k_version;
 204         struct utsname myuname;
 205
 206 +       /* check the kernel version */
 207 +       if ((uname(&myuname) != 0) || (myuname.release[0] != '2'))
 208 +               return EINVAL;
 209 +
 210 +       k_version = myuname.release[2] - '0';
 211 +       if (k_version > 4)
 212 +               return ENOTSUP;
 213 +
 214         /* Parse any options */
 215         getopt32(argv, OPTION_STR, &opt_o);
 216         arg1 = argv[optind];
 217         if (option_mask32 & OPT_o) { // -o /* name the output module */
 218 -               free(m_name);
 219                 m_name = xstrdup(opt_o);
 220         }
 221
 222 -       if (arg1 == NULL) {
 223 +       if (arg1 == NULL)
 224                 bb_show_usage();
 225 -       }
 226 -
 227 -       /* Grab the module name */
 228 -       tmp1 = xstrdup(arg1);
 229 -       tmp = basename(tmp1);
 230 -       len = strlen(tmp);
 231 -
 232 -       if (uname(&myuname) == 0) {
 233 -               if (myuname.release[0] == '2') {
 234 -                       k_version = myuname.release[2] - '0';
 235 -               }
 236 -       }
 237 -
 238 -#if ENABLE_FEATURE_2_6_MODULES
 239 -       if (k_version > 4 && len > 3 && tmp[len - 3] == '.'
 240 -        && tmp[len - 2] == 'k' && tmp[len - 1] == 'o'
 241 -       ) {
 242 -               len -= 3;
 243 -               tmp[len] = '\0';
 244 -       } else
 245 -#endif
 246 -               if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') {
 247 -                       len -= 2;
 248 -                       tmp[len] = '\0';
 249 -               }
 250 -
 251
 252 -#if ENABLE_FEATURE_2_6_MODULES
 253 -       if (k_version > 4)
 254 -               m_fullName = xasprintf("%s.ko", tmp);
 255 -       else
 256 -#endif
 257 -               m_fullName = xasprintf("%s.o", tmp);
 258 +       ret = find_module(arg1);
 259 +       if (ret)
 260 +               goto out;
 261
 262         if (!m_name) {
 263 -               m_name = tmp;
 264 -       } else {
 265 -               free(tmp1);
 266 -               tmp1 = 0;       /* flag for free(m_name) before exit() */
 267 +               tmp = xstrdup(arg1);
 268 +               m_name = basename(tmp);
 269         }
 270
 271 -       /* Get a filedesc for the module.  Check we we have a complete path */
 272 -       if (stat(arg1, &st) < 0 || !S_ISREG(st.st_mode)
 273 -        || (fp = fopen(arg1, "r")) == NULL
 274 -       ) {
 275 -               /* Hmm.  Could not open it.  First search under /lib/modules/`uname -r`,
 276 -                * but do not error out yet if we fail to find it... */
 277 -               if (k_version) {        /* uname succeedd */
 278 -                       char *module_dir;
 279 -                       char *tmdn;
 280 -                       char real_module_dir[FILENAME_MAX];
 281 -
 282 -                       tmdn = concat_path_file(_PATH_MODULES, myuname.release);
 283 -                       /* Jump through hoops in case /lib/modules/`uname -r`
 284 -                        * is a symlink.  We do not want recursive_action to
 285 -                        * follow symlinks, but we do want to follow the
 286 -                        * /lib/modules/`uname -r` dir, So resolve it ourselves
 287 -                        * if it is a link... */
 288 -                       if (realpath(tmdn, real_module_dir) == NULL)
 289 -                               module_dir = tmdn;
 290 -                       else
 291 -                               module_dir = real_module_dir;
 292 -                       recursive_action(module_dir, ACTION_RECURSE,
 293 -                                       check_module_name_match, 0, m_fullName, 0);
 294 -                       free(tmdn);
 295 -               }
 296 -
 297 -               /* Check if we have found anything yet */
 298 -               if (m_filename == 0 || ((fp = fopen(m_filename, "r")) == NULL)) {
 299 -                       char module_dir[FILENAME_MAX];
 300 -
 301 -                       free(m_filename);
 302 -                       m_filename = 0;
 303 -                       if (realpath (_PATH_MODULES, module_dir) == NULL)
 304 -                               strcpy(module_dir, _PATH_MODULES);
 305 -                       /* No module found under /lib/modules/`uname -r`, this
 306 -                        * time cast the net a bit wider.  Search /lib/modules/ */
 307 -                       if (!recursive_action(module_dir, ACTION_RECURSE,
 308 -                                                   check_module_name_match, 0, m_fullName, 0)
 309 -                       ) {
 310 -                               if (m_filename == 0
 311 -                                || ((fp = fopen(m_filename, "r")) == NULL)
 312 -                               ) {
 313 -                                       bb_error_msg("%s: no module by that name found", m_fullName);
 314 -                                       goto out;
 315 -                               }
 316 -                       } else
 317 -                               bb_error_msg_and_die("%s: no module by that name found", m_fullName);
 318 -               }
 319 -       } else
 320 -               m_filename = xstrdup(arg1);
 321 -
 322 -       if (flag_verbose)
 323 -               printf("Using %s\n", m_filename);
 324 -
 325 -#if ENABLE_FEATURE_2_6_MODULES
 326 -       if (k_version > 4) {
 327 -               argv[optind] = m_filename;
 328 -               optind--;
 329 -               return insmod_ng_main(argc - optind, argv + optind);
 330 +       fp = fopen(g_filename, "r");
 331 +       if (!fp) {
 332 +               ret = errno;
 333 +               goto out;
 334         }
 335 -#endif
 336
 337         f = obj_load(fp, LOADBITS);
 338         if (f == NULL)
 339 @@ -4120,7 +4095,7 @@
 340                                 "\t%s was compiled for kernel version %s\n"
 341                                 "\twhile this kernel is version %s",
 342                                 flag_force_load ? "warning: " : "",
 343 -                               m_filename, m_strversion, uts_info.release);
 344 +                               g_filename, m_strversion, uts_info.release);
 345                         if (!flag_force_load)
 346                                 goto out;
 347                 }
 348 @@ -4173,7 +4148,7 @@
 349         hide_special_symbols(f);
 350
 351  #if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
 352 -       add_ksymoops_symbols(f, m_filename, m_name);
 353 +       add_ksymoops_symbols(f, g_filename, m_name);
 354  #endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
 355
 356         new_create_module_ksymtab(f);
 357 @@ -4220,30 +4195,22 @@
 358         if (flag_print_load_map)
 359                 print_load_map(f);
 360
 361 -       exit_status = EXIT_SUCCESS;
 362 -
 363 +       ret = 0;
 364  out:
 365  #if ENABLE_FEATURE_CLEAN_UP
 366         if (fp)
 367                 fclose(fp);
 368 -       free(tmp1);
 369 -       if (!tmp1)
 370 +       if (tmp)
 371 +               free(tmp);
 372 +       else if (m_name)
 373                 free(m_name);
 374 -       free(m_filename);
 375 +       free(g_filename);
 376  #endif
 377 -       return exit_status;
 378 +       return ret;
 379  }
 380 -
 381 -
 382  #endif
 383
 384 -
 385  #if ENABLE_FEATURE_2_6_MODULES
 386 -
 387 -#include <sys/mman.h>
 388 -#include <asm/unistd.h>
 389 -#include <sys/syscall.h>
 390 -
 391  /* We use error numbers in a loose translation... */
 392  static const char *moderror(int err)
 393  {
 394 @@ -4261,19 +4228,32 @@
 395         }
 396  }
 397
 398 -int insmod_ng_main(int argc, char **argv);
 399 -int insmod_ng_main(int argc, char **argv)
 400 +int insmod_main_26(int argc, char **argv)
 401  {
 402 -       long ret;
 403 -       size_t len;
 404 +       char *filename, *options;
 405 +       struct utsname myuname;
 406 +       int k_version;
 407         int optlen;
 408 +       size_t len;
 409         void *map;
 410 -       char *filename, *options;
 411 +       long ret = 0;
 412 +
 413 +       /* check the kernel version */
 414 +       if ((uname(&myuname) != 0) || (myuname.release[0] != '2'))
 415 +               return EINVAL;
 416 +
 417 +       k_version = myuname.release[2] - '0';
 418 +       if (k_version <= 4)
 419 +               return ENOTSUP;
 420
 421         filename = *++argv;
 422         if (!filename)
 423                 bb_show_usage();
 424
 425 +       ret = find_module(filename);
 426 +       if (ret || (g_filename == NULL))
 427 +               goto done;
 428 +
 429         /* Rest is options */
 430         options = xzalloc(1);
 431         optlen = 0;
 432 @@ -4283,36 +4263,47 @@
 433                 optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
 434         }
 435
 436 -#if 0
 437 -       /* Any special reason why mmap? It isn't performace critical... */
 438 -       int fd;
 439 -       struct stat st;
 440 -       unsigned long len;
 441 -       fd = xopen(filename, O_RDONLY);
 442 -       fstat(fd, &st);
 443 -       len = st.st_size;
 444 -       map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
 445 -       if (map == MAP_FAILED) {
 446 -               bb_perror_msg_and_die("cannot mmap '%s'", filename);
 447 -       }
 448 -
 449 -       /* map == NULL on Blackfin, probably on other MMU-less systems too. Workaround. */
 450 -       if (map == NULL) {
 451 -               map = xmalloc(len);
 452 -               xread(fd, map, len);
 453 -       }
 454 -#else
 455         len = MAXINT(ssize_t);
 456 -       map = xmalloc_open_read_close(filename, &len);
 457 -#endif
 458 -
 459 +       map = xmalloc_open_read_close(g_filename, &len);
 460         ret = syscall(__NR_init_module, map, len, options);
 461         if (ret != 0) {
 462                 bb_perror_msg_and_die("cannot insert '%s': %s (%li)",
 463 -                               filename, moderror(errno), ret);
 464 +                               g_filename, moderror(errno), ret);
 465         }
 466 +done:
 467 +       if (g_filename && (g_filename != filename))
 468 +               free(g_filename);
 469
 470 -       return 0;
 471 +       return ret;
 472  }
 473
 474  #endif
 475 +
 476 +int insmod_main(int argc, char **argv)
 477 +{
 478 +       int ret;
 479 +
 480 +       g_filename = NULL;
 481 +#if ENABLE_FEATURE_2_6_MODULES
 482 +       ret = insmod_main_26(argc, argv);
 483 +       if (ret != ENOTSUP)
 484 +               goto done;
 485 +#endif
 486 +
 487 +#if ENABLE_FEATURE_2_4_MODULES
 488 +       ret = insmod_main_24(argc, argv);
 489 +       if (ret != ENOTSUP)
 490 +               goto done;
 491 +#endif
 492 +
 493 +       fprintf(stderr, "Error: Kernel version not supported\n");
 494 +       return 1;
 495 +
 496 +done:
 497 +       if (ret) {
 498 +               errno = ret;
 499 +               bb_perror_msg("Loading module failed");
 500 +               return ret;
 501 +       } else
 502 +               return 0;
 503 +}