include/linux/genhd.h

/* */
   1 #ifndef _LINUX_GENHD_H
   2 #define _LINUX_GENHD_H
   3 
   4 /*
   5  *      genhd.h Copyright (C) 1992 Drew Eckhardt
   6  *      Generic hard disk header file by  
   7  *              Drew Eckhardt
   8  *
   9  *              <drew@colorado.edu>
  10  */
  11 
  12 #define CONFIG_MSDOS_PARTITION 1
  13 
  14 #ifdef __alpha__
  15 #define CONFIG_OSF_PARTITION 1
  16 #endif
  17         
  18 #define EXTENDED_PARTITION 5
  19 
  20 #define DM6_PARTITION           0x54    /* has DDO: use xlated geom & offset */
  21 #define DM6_AUXPARTITION        0x51    /* no DDO:  use xlated geom */
  22         
  23 struct partition {
  24         unsigned char boot_ind;         /* 0x80 - active */
  25         unsigned char head;             /* starting head */
  26         unsigned char sector;           /* starting sector */
  27         unsigned char cyl;              /* starting cylinder */
  28         unsigned char sys_ind;          /* What partition type */
  29         unsigned char end_head;         /* end head */
  30         unsigned char end_sector;       /* end sector */
  31         unsigned char end_cyl;          /* end cylinder */
  32         unsigned int start_sect;        /* starting sector counting from 0 */
  33         unsigned int nr_sects;          /* nr of sectors in partition */
  34 };
  35 
  36 struct hd_struct {
  37         long start_sect;
  38         long nr_sects;
  39 };
  40 
  41 struct gendisk {
  42         int major;                      /* major number of driver */
  43         char *major_name;               /* name of major driver */
  44         int minor_shift;                /* number of times minor is shifted to
  45                                            get real minor */
  46         int max_p;                      /* maximum partitions per device */
  47         int max_nr;                     /* maximum number of real devices */
  48 
  49         void (*init)(void);             /* Initialization called before we do our thing */
  50         struct hd_struct *part;         /* partition table */
  51         int *sizes;                     /* size of device in blocks */
  52         int nr_real;                    /* number of real devices */
  53 
  54         void *real_devices;             /* internal use */
  55         struct gendisk *next;
  56 };
  57 
  58 extern int NR_GENDISKS;                 /* total */
  59 extern struct gendisk *gendisk_head;    /* linked list of disks */
  60 
  61 #endif
/* */
root/include/linux/genhd.h

INCLUDED FROM
