external/gpl2/lvm2/dist/lib/netbsd/dev.c

   1 /*      $NetBSD: dev.c,v 1.1 2008/12/22 00:56:59 haad Exp $        */
   2
   3 /*
   4  * NetBSD specific device routines are added to this file.
   5  */
   6
   7 #include <sys/param.h>
   8 #include <sys/types.h>
   9
  10 #include <sys/sysctl.h>
  11
  12 #include <dirent.h>
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <unistd.h>
  16 #include <ctype.h>
  17 #include <fcntl.h>
  18 #include <limits.h>
  19
  20 #include "netbsd.h"
  21
  22 #define LVM_FAILURE -1
  23
  24 /*
  25  * Find major numbers for char/block parts of all block devices.
  26  * In NetBSD every block device has it's char counter part.
  27  * Return success only for device drivers with defined char/block
  28  * major numbers.
  29  */
  30 int
  31 nbsd_check_dev(int major, const char *path)
  32 {
  33
  34         size_t val_len,i;
  35
  36         struct kinfo_drivers *kd;
  37
  38         /* XXX HACK */
  39         if (strcmp(path,"/dev/console") == 0)
  40                 return LVM_FAILURE;
  41
  42         /* get size kernel drivers array from kernel*/
  43         if (sysctlbyname("kern.drivers",NULL,&val_len,NULL,0) < 0) {
  44                 printf("sysctlbyname failed");
  45                 return LVM_FAILURE;
  46         }
  47
  48         if ((kd = malloc (val_len)) == NULL){
  49                 printf("malloc kd info error\n");
  50                 return LVM_FAILURE;
  51         }
  52
  53         /* get array from kernel */
  54         if (sysctlbyname("kern.drivers", kd, &val_len, NULL, 0) < 0) {
  55                 printf("sysctlbyname failed kd");
  56                 return LVM_FAILURE;
  57         }
  58
  59         for (i = 0, val_len /= sizeof(*kd); i < val_len; i++)
  60                 /* We select only devices with correct char/block major number. */
  61                 if (kd[i].d_cmajor != -1 && kd[i].d_bmajor != -1) {
  62
  63                         if (kd[i].d_cmajor == major)
  64                                 return 0;
  65                 }
  66
  67         return LVM_FAILURE;
  68 }