/*
 * gm_fat.h -- gpart fat guessing module header
 * 
 * gpart (c) 1999-2001 Michail Brzitwa <mb@ichabod.han.de>
 * Guess PC-type hard disk partitions.
 *
 * gpart is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * Created:   04.01.1999 <mb@ichabod.han.de>
 * Modified:  
 *
 */

#ifndef _GM_FAT_H
#define _GM_FAT_H


/*
 * FAT partition boot sector information, taken from the Linux
 * kernel sources.
 */


/* imported from asm/types.h */
typedef __signed__ char __s8;
typedef unsigned char __u8;

typedef __signed__ short __s16;
typedef unsigned short __u16;

typedef __signed__ int __s32;
typedef unsigned int __u32;


struct fat_boot_sector {
	__s8	ignored[3];	/* Boot strap short or near jump */
	__s8	system_id[8];	/* Name - can be used to special case
				   partition manager volumes */
	__u8	sector_size[2];	/* bytes per logical sector */
	__u8	cluster_size;	/* sectors/cluster */
	__u16	reserved;	/* reserved sectors */
	__u8	fats;		/* number of FATs */
	__u8	dir_entries[2];	/* root directory entries */
	__u8	sectors[2];	/* number of sectors */
	__u8	media;		/* media code (unused) */
	__u16	fat_length;	/* sectors/FAT */
	__u16	secs_track;	/* sectors per track */
	__u16	heads;		/* number of heads */
	__u32	hidden;		/* hidden sectors (unused) */
	__u32	total_sect;	/* number of sectors (if sectors == 0) */

	/* The following fields are only used by FAT32 */
	__u32	fat32_length;	/* sectors/FAT */
	__u16	flags;		/* bit 8: fat mirroring, low 4: active fat */
	__u8	version[2];	/* major, minor filesystem version */
	__u32	root_cluster;	/* first cluster in root directory */
	__u16	info_sector;	/* filesystem info sector */
	__u16	backup_boot;	/* backup boot sector */
	__u16	reserved2[6];	/* Unused */
};

#endif /* _GM_FAT_H */