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        2007-10-05 14:39:19.922555340 +0200
   4 +++ busybox-1.7.2/modutils/insmod.c     2007-10-05 21:08:55.442650322 +0200
   5 @@ -61,19 +61,107 @@
   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 +                       return 0;
  86 +       }
  87 +
  88 +       /* next: scan /lib/modules/<release> */
  89 +       /* Jump through hoops in case /lib/modules/`uname -r`
  90 +       * is a symlink.  We do not want recursive_action to
  91 +       * follow symlinks, but we do want to follow the
  92 +       * /lib/modules/`uname -r` dir, So resolve it ourselves
  93 +       * if it is a link... */
  94 +       module_dir = concat_path_file(_PATH_MODULES, myuname.release);
  95 +       if (realpath(module_dir, real_module_dir) != NULL) {
  96 +               free(module_dir);
  97 +               module_dir = real_module_dir;
  98 +       }
  99 +
 100 +       recursive_action(module_dir, ACTION_RECURSE,
 101 +               check_module_name_match, 0, filename, 0);
 102 +
 103 +       /* Check if we have a complete path */
 104 +       if (g_filename != NULL) {
 105 +               if ((stat(g_filename, &st) == 0) && S_ISREG(st.st_mode))
 106 +                       ret = 0;
 107 +               else
 108 +                       free(g_filename);
 109 +       }
 110 +       free(filename);
 111 +
 112 +       return ret;
 113 +}
 114
 115
 116  #if ENABLE_FEATURE_2_4_MODULES
 117 @@ -677,7 +765,6 @@
 118  #endif
 119
 120
 121 -#define _PATH_MODULES  "/lib/modules"
 122  enum { STRVERSIONLEN = 64 };
 123
 124  /*======================================================================*/
 125 @@ -790,37 +877,6 @@
 126  static int n_ext_modules_used;
 127  extern int delete_module(const char *);
 128
 129 -static char *m_filename;
 130 -static char *m_fullName;
 131 -
 132 -
 133 -/*======================================================================*/
 134 -
 135 -
 136 -static int check_module_name_match(const char *filename, struct stat *statbuf,
 137 -                               void *userdata, int depth)
 138 -{
 139 -       char *fullname = (char *) userdata;
 140 -
 141 -       if (fullname[0] == '\0')
 142 -               return FALSE;
 143 -       else {
 144 -               char *tmp, *tmp1 = xstrdup(filename);
 145 -               tmp = bb_get_last_path_component(tmp1);
 146 -               if (strcmp(tmp, fullname) == 0) {
 147 -                       free(tmp1);
 148 -                       /* Stop searching if we find a match */
 149 -                       m_filename = xstrdup(filename);
 150 -                       return FALSE;
 151 -               }
 152 -               free(tmp1);
 153 -       }
 154 -       return TRUE;
 155 -}
 156 -
 157 -
 158 -/*======================================================================*/
 159 -
 160  static struct obj_file *arch_new_file(void)
 161  {
 162         struct arch_file *f;
 163 @@ -3952,145 +4008,57 @@
 164  void print_load_map(struct obj_file *f);
 165  #endif
 166
 167 -int insmod_main( int argc, char **argv);
 168 -int insmod_main( int argc, char **argv)
 169 +int insmod_main_24( int argc, char **argv)
 170  {
 171         char *opt_o, *arg1;
 172 -       int len;
 173         int k_crcs;
 174 -       char *tmp, *tmp1;
 175         unsigned long m_size;
 176         ElfW(Addr) m_addr;
 177         struct obj_file *f;
 178 -       struct stat st;
 179 -       char *m_name = 0;
 180 -       int exit_status = EXIT_FAILURE;
 181 +       char *tmp = NULL, *m_name = NULL;
 182 +       int ret = EINVAL;
 183         int m_has_modinfo;
 184  #if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
 185         struct utsname uts_info;
 186         char m_strversion[STRVERSIONLEN];
 187         int m_version, m_crcs;
 188  #endif
 189 -#if ENABLE_FEATURE_CLEAN_UP
 190 -       FILE *fp = 0;
 191 -#else
 192 -       FILE *fp;
 193 -#endif
 194 -       int k_version = 0;
 195 +       FILE *fp = NULL;
 196 +       int k_version;
 197         struct utsname myuname;
 198
 199 +       /* check the kernel version */
 200 +       if ((uname(&myuname) != 0) || (myuname.release[0] != '2'))
 201 +               return EINVAL;
 202 +
 203 +       k_version = myuname.release[2] - '0';
 204 +       if (k_version > 4)
 205 +               return ENOTSUP;
 206 +
 207         /* Parse any options */
 208         getopt32(argv, OPTION_STR, &opt_o);
 209         arg1 = argv[optind];
 210         if (option_mask32 & OPT_o) { // -o /* name the output module */
 211 -               free(m_name);
 212                 m_name = xstrdup(opt_o);
 213         }
 214
 215 -       if (arg1 == NULL) {
 216 +       if (arg1 == NULL)
 217                 bb_show_usage();
 218 -       }
 219 -
 220 -       /* Grab the module name */
 221 -       tmp1 = xstrdup(arg1);
 222 -       tmp = basename(tmp1);
 223 -       len = strlen(tmp);
 224 -
 225 -       if (uname(&myuname) == 0) {
 226 -               if (myuname.release[0] == '2') {
 227 -                       k_version = myuname.release[2] - '0';
 228 -               }
 229 -       }
 230
 231 -#if ENABLE_FEATURE_2_6_MODULES
 232 -       if (k_version > 4 && len > 3 && tmp[len - 3] == '.'
 233 -        && tmp[len - 2] == 'k' && tmp[len - 1] == 'o'
 234 -       ) {
 235 -               len -= 3;
 236 -               tmp[len] = '\0';
 237 -       } else
 238 -#endif
 239 -               if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') {
 240 -                       len -= 2;
 241 -                       tmp[len] = '\0';
 242 -               }
 243 -
 244 -
 245 -#if ENABLE_FEATURE_2_6_MODULES
 246 -       if (k_version > 4)
 247 -               m_fullName = xasprintf("%s.ko", tmp);
 248 -       else
 249 -#endif
 250 -               m_fullName = xasprintf("%s.o", tmp);
 251 +       ret = find_module(arg1);
 252 +       if (ret)
 253 +               goto out;
 254
 255         if (!m_name) {
 256 -               m_name = tmp;
 257 -       } else {
 258 -               free(tmp1);
 259 -               tmp1 = 0;       /* flag for free(m_name) before exit() */
 260 +               tmp = xstrdup(arg1);
 261 +               m_name = basename(tmp);
 262         }
 263
 264 -       /* Get a filedesc for the module.  Check we we have a complete path */
 265 -       if (stat(arg1, &st) < 0 || !S_ISREG(st.st_mode)
 266 -        || (fp = fopen(arg1, "r")) == NULL
 267 -       ) {
 268 -               /* Hmm.  Could not open it.  First search under /lib/modules/`uname -r`,
 269 -                * but do not error out yet if we fail to find it... */
 270 -               if (k_version) {        /* uname succeedd */
 271 -                       char *module_dir;
 272 -                       char *tmdn;
 273 -                       char real_module_dir[FILENAME_MAX];
 274 -
 275 -                       tmdn = concat_path_file(_PATH_MODULES, myuname.release);
 276 -                       /* Jump through hoops in case /lib/modules/`uname -r`
 277 -                        * is a symlink.  We do not want recursive_action to
 278 -                        * follow symlinks, but we do want to follow the
 279 -                        * /lib/modules/`uname -r` dir, So resolve it ourselves
 280 -                        * if it is a link... */
 281 -                       if (realpath(tmdn, real_module_dir) == NULL)
 282 -                               module_dir = tmdn;
 283 -                       else
 284 -                               module_dir = real_module_dir;
 285 -                       recursive_action(module_dir, ACTION_RECURSE,
 286 -                                       check_module_name_match, 0, m_fullName, 0);
 287 -                       free(tmdn);
 288 -               }
 289 -
 290 -               /* Check if we have found anything yet */
 291 -               if (m_filename == 0 || ((fp = fopen(m_filename, "r")) == NULL)) {
 292 -                       char module_dir[FILENAME_MAX];
 293 -
 294 -                       free(m_filename);
 295 -                       m_filename = 0;
 296 -                       if (realpath (_PATH_MODULES, module_dir) == NULL)
 297 -                               strcpy(module_dir, _PATH_MODULES);
 298 -                       /* No module found under /lib/modules/`uname -r`, this
 299 -                        * time cast the net a bit wider.  Search /lib/modules/ */
 300 -                       if (!recursive_action(module_dir, ACTION_RECURSE,
 301 -                                                   check_module_name_match, 0, m_fullName, 0)
 302 -                       ) {
 303 -                               if (m_filename == 0
 304 -                                || ((fp = fopen(m_filename, "r")) == NULL)
 305 -                               ) {
 306 -                                       bb_error_msg("%s: no module by that name found", m_fullName);
 307 -                                       goto out;
 308 -                               }
 309 -                       } else
 310 -                               bb_error_msg_and_die("%s: no module by that name found", m_fullName);
 311 -               }
 312 -       } else
 313 -               m_filename = xstrdup(arg1);
 314 -
 315 -       if (flag_verbose)
 316 -               printf("Using %s\n", m_filename);
 317 -
 318 -#if ENABLE_FEATURE_2_6_MODULES
 319 -       if (k_version > 4) {
 320 -               argv[optind] = m_filename;
 321 -               optind--;
 322 -               return insmod_ng_main(argc - optind, argv + optind);
 323 +       fp = fopen(g_filename, "r");
 324 +       if (!fp) {
 325 +               ret = errno;
 326 +               goto out;
 327         }
 328 -#endif
 329
 330         f = obj_load(fp, LOADBITS);
 331         if (f == NULL)
 332 @@ -4120,7 +4088,7 @@
 333                                 "\t%s was compiled for kernel version %s\n"
 334                                 "\twhile this kernel is version %s",
 335                                 flag_force_load ? "warning: " : "",
 336 -                               m_filename, m_strversion, uts_info.release);
 337 +                               g_filename, m_strversion, uts_info.release);
 338                         if (!flag_force_load)
 339                                 goto out;
 340                 }
 341 @@ -4173,7 +4141,7 @@
 342         hide_special_symbols(f);
 343
 344  #if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
 345 -       add_ksymoops_symbols(f, m_filename, m_name);
 346 +       add_ksymoops_symbols(f, g_filename, m_name);
 347  #endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
 348
 349         new_create_module_ksymtab(f);
 350 @@ -4220,30 +4188,22 @@
 351         if (flag_print_load_map)
 352                 print_load_map(f);
 353
 354 -       exit_status = EXIT_SUCCESS;
 355 -
 356 +       ret = 0;
 357  out:
 358  #if ENABLE_FEATURE_CLEAN_UP
 359         if (fp)
 360                 fclose(fp);
 361 -       free(tmp1);
 362 -       if (!tmp1)
 363 +       if (tmp)
 364 +               free(tmp);
 365 +       else if (m_name)
 366                 free(m_name);
 367 -       free(m_filename);
 368 +       free(g_filename);
 369  #endif
 370 -       return exit_status;
 371 +       return ret;
 372  }
 373 -
 374 -
 375  #endif
 376
 377 -
 378  #if ENABLE_FEATURE_2_6_MODULES
 379 -
 380 -#include <sys/mman.h>
 381 -#include <asm/unistd.h>
 382 -#include <sys/syscall.h>
 383 -
 384  /* We use error numbers in a loose translation... */
 385  static const char *moderror(int err)
 386  {
 387 @@ -4261,19 +4221,33 @@
 388         }
 389  }
 390
 391 -int insmod_ng_main(int argc, char **argv);
 392 -int insmod_ng_main(int argc, char **argv)
 393 +int insmod_main_26(int argc, char **argv)
 394  {
 395 -       long ret;
 396 -       size_t len;
 397 +       char *filename, *options;
 398 +       struct utsname myuname;
 399 +       int k_version;
 400         int optlen;
 401 +       size_t len;
 402         void *map;
 403 -       char *filename, *options;
 404 +       long ret = 0;
 405 +
 406 +       /* check the kernel version */
 407 +       if ((uname(&myuname) != 0) || (myuname.release[0] != '2'))
 408 +               return EINVAL;
 409 +
 410 +       k_version = myuname.release[2] - '0';
 411 +       if (k_version <= 4)
 412 +               return ENOTSUP;
 413
 414         filename = *++argv;
 415         if (!filename)
 416                 bb_show_usage();
 417
 418 +       g_filename = filename;
 419 +       ret = find_module(filename);
 420 +       if (ret)
 421 +               goto done;
 422 +
 423         /* Rest is options */
 424         options = xzalloc(1);
 425         optlen = 0;
 426 @@ -4283,36 +4257,46 @@
 427                 optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
 428         }
 429
 430 -#if 0
 431 -       /* Any special reason why mmap? It isn't performace critical... */
 432 -       int fd;
 433 -       struct stat st;
 434 -       unsigned long len;
 435 -       fd = xopen(filename, O_RDONLY);
 436 -       fstat(fd, &st);
 437 -       len = st.st_size;
 438 -       map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
 439 -       if (map == MAP_FAILED) {
 440 -               bb_perror_msg_and_die("cannot mmap '%s'", filename);
 441 -       }
 442 -
 443 -       /* map == NULL on Blackfin, probably on other MMU-less systems too. Workaround. */
 444 -       if (map == NULL) {
 445 -               map = xmalloc(len);
 446 -               xread(fd, map, len);
 447 -       }
 448 -#else
 449         len = MAXINT(ssize_t);
 450 -       map = xmalloc_open_read_close(filename, &len);
 451 -#endif
 452 -
 453 +       map = xmalloc_open_read_close(g_filename, &len);
 454         ret = syscall(__NR_init_module, map, len, options);
 455         if (ret != 0) {
 456                 bb_perror_msg_and_die("cannot insert '%s': %s (%li)",
 457 -                               filename, moderror(errno), ret);
 458 +                               g_filename, moderror(errno), ret);
 459         }
 460 +done:
 461 +       if (g_filename && (g_filename != filename))
 462 +               free(g_filename);
 463
 464 -       return 0;
 465 +       return ret;
 466  }
 467
 468  #endif
 469 +
 470 +int insmod_main(int argc, char **argv)
 471 +{
 472 +       int ret;
 473 +
 474 +#if ENABLE_FEATURE_2_6_MODULES
 475 +       ret = insmod_main_26(argc, argv);
 476 +       if (ret != ENOTSUP)
 477 +               goto done;
 478 +#endif
 479 +
 480 +#if ENABLE_FEATURE_2_4_MODULES
 481 +       ret = insmod_main_24(argc, argv);
 482 +       if (ret != ENOTSUP)
 483 +               goto done;
 484 +#endif
 485 +
 486 +       fprintf(stderr, "Error: Kernel version not supported\n");
 487 +       return 1;
 488 +
 489 +done:
 490 +       if (ret) {
 491 +               errno = ret;
 492 +               bb_perror_msg("Loading module failed");
 493 +               return ret;
 494 +       } else
 495 +               return 0;
 496 +}