package/utils/busybox/patches/470-insmod_search.patch

   1 --- a/modutils/Config.src
   2 +++ b/modutils/Config.src
   3 @@ -247,7 +247,7 @@ config FEATURE_MODUTILS_SYMBOLS
   4  config DEFAULT_MODULES_DIR
   5         string "Default directory containing modules"
   6         default "/lib/modules"
   7 -       depends on DEPMOD || MODPROBE || MODPROBE_SMALL || MODINFO
   8 +       depends on DEPMOD || INSMOD || MODPROBE || MODPROBE_SMALL || MODINFO
   9         help
  10           Directory that contains kernel modules.
  11           Defaults to "/lib/modules"
  12 --- a/modutils/insmod.c
  13 +++ b/modutils/insmod.c
  14 @@ -11,6 +11,106 @@
  15
  16  #include "libbb.h"
  17  #include "modutils.h"
  18 +#include <sys/utsname.h>
  19 +#ifndef CONFIG_FEATURE_2_4_MODULES
  20 +#include <sys/mman.h>
  21 +#include <asm/unistd.h>
  22 +#include <sys/syscall.h>
  23 +#endif
  24 +
  25 +static char *g_filename = NULL;
  26 +
  27 +static int FAST_FUNC check_module_name_match(const char *filename, struct stat *statbuf,
  28 +                                  void *userdata, int depth)
  29 +{
  30 +       char *fullname = (char *) userdata;
  31 +       char *tmp;
  32 +
  33 +       if (fullname[0] == '\0')
  34 +               return FALSE;
  35 +
  36 +       tmp = bb_get_last_path_component_nostrip(filename);
  37 +       if (strcmp(tmp, fullname) == 0) {
  38 +               /* Stop searching if we find a match */
  39 +               g_filename = xstrdup(filename);
  40 +               return FALSE;
  41 +       }
  42 +
  43 +       return TRUE;
  44 +}
  45 +
  46 +static int find_module(char *filename)
  47 +{
  48 +       char *module_dir, real_module_dir[FILENAME_MAX];
  49 +       int len, slen, ret = ENOENT, k_version;
  50 +       struct utsname myuname;
  51 +       const char *suffix = ".ko";
  52 +       struct stat st;
  53 +
  54 +       /* check the kernel version */
  55 +       if (uname(&myuname) != 0)
  56 +               return EINVAL;
  57 +
  58 +       k_version = myuname.release[0] - '0';
  59 +
  60 +       if (k_version < 2 || k_version > 9)
  61 +               return EINVAL;
  62 +
  63 +       if (k_version == 2) {
  64 +               int k_patchlevel = myuname.release[2] - '0';
  65 +               if (k_patchlevel <= 4)
  66 +#if ENABLE_FEATURE_2_4_MODULES
  67 +                       suffix = ".o";
  68 +#else
  69 +                       return EINVAL;
  70 +#endif
  71 +       }
  72 +
  73 +       len = strlen(filename);
  74 +       slen = strlen(suffix);
  75 +
  76 +       /* check for suffix and absolute path first */
  77 +       if ((len < slen + 2) || (strcmp(filename + len - slen, suffix) != 0)) {
  78 +               filename = xasprintf("%s%s", filename, suffix);
  79 +       } else {
  80 +               filename = strdup(filename);
  81 +               if ((stat(filename, &st) == 0) && S_ISREG(st.st_mode)) {
  82 +                       g_filename = filename;
  83 +                       return 0;
  84 +               }
  85 +               free(filename);
  86 +               return ENOENT;
  87 +       }
  88 +
  89 +       /* next: scan /lib/modules/<release> */
  90 +       /* Jump through hoops in case /lib/modules/`uname -r`
  91 +       * is a symlink.  We do not want recursive_action to
  92 +       * follow symlinks, but we do want to follow the
  93 +       * /lib/modules/`uname -r` dir, So resolve it ourselves
  94 +       * if it is a link... */
  95 +       module_dir = concat_path_file(CONFIG_DEFAULT_MODULES_DIR, myuname.release);
  96 +       if (realpath(module_dir, real_module_dir) != NULL) {
  97 +               free(module_dir);
  98 +               module_dir = real_module_dir;
  99 +       }
 100 +
 101 +       recursive_action(module_dir, ACTION_RECURSE,
 102 +               check_module_name_match, 0, filename, 0);
 103 +
 104 +       /* Check if we have a complete path */
 105 +       if (g_filename == NULL)
 106 +               goto done;
 107 +
 108 +       if ((stat(g_filename, &st) == 0) && S_ISREG(st.st_mode))
 109 +               ret = 0;
 110 +       else
 111 +               free(g_filename);
 112 +
 113 +done:
 114 +       free(filename);
 115 +
 116 +       return ret;
 117 +}
 118
 119  /* 2.6 style insmod has no options and required filename
 120   * (not module name - .ko can't be omitted) */
 121 @@ -58,9 +158,15 @@ int insmod_main(int argc UNUSED_PARAM, c
 122         if (!filename)
 123                 bb_show_usage();
 124
 125 -       rc = bb_init_module(filename, parse_cmdline_module_options(argv, /*quote_spaces:*/ 0));
 126 +       rc = find_module(filename);
 127 +       if (rc || (g_filename == NULL))
 128 +               goto done;
 129 +
 130 +       rc = bb_init_module(g_filename, parse_cmdline_module_options(argv, /*quote_spaces:*/ 0));
 131         if (rc)
 132                 bb_error_msg("can't insert '%s': %s", filename, moderror(rc));
 133 +       free (g_filename);
 134
 135 +done:
 136         return rc;
 137  }