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#ifndef _ADFS_FS_H

#define _ADFS_FS_H

#include <linux/types.h>

/*

 * Disc Record at disc address 0xc00

 */

struct adfs_discrecord {

    __u8  log2secsize;

    __u8  secspertrack;

    __u8  heads;

    __u8  density;

    __u8  idlen;

    __u8  log2bpmb;

    __u8  skew;

    __u8  bootoption;

    __u8  lowsector;

    __u8  nzones;

    __u16 zone_spare;

    __u32 root;

    __u32 disc_size;

    __u16 disc_id;

    __u8  disc_name[10];

    __u32 disc_type;

    __u32 disc_size_high;

    __u8  log2sharesize:4;

    __u8  unused40:4;

    __u8  big_flag:1;

    __u8  unused41:1;

    __u8  nzones_high;

    __u32 format_version;

    __u32 root_size;

    __u8  unused52[60 - 52];

};

#define ADFS_DISCRECORD         (0xc00)

#define ADFS_DR_OFFSET          (0x1c0)

#define ADFS_DR_SIZE             60

#define ADFS_DR_SIZE_BITS       (ADFS_DR_SIZE << 3)

#define ADFS_SUPER_MAGIC         0xadf5

#ifdef __KERNEL__

#include <linux/adfs_fs_i.h>

#include <linux/adfs_fs_sb.h>

/*

 * Calculate the boot block checksum on an ADFS drive.  Note that this will

 * appear to be correct if the sector contains all zeros, so also check that

 * the disk size is non-zero!!!

 */

static inline int adfs_checkbblk(unsigned char *ptr)

{

        unsigned int result = 0;

        unsigned char *p = ptr + 511;

        do {

                result = (result & 0xff) + (result >> 8);

                result = result + *--p;

        } while (p != ptr);

        return (result & 0xff) != ptr[511];

}

static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb)

{

        return sb->s_fs_info;

}

static inline struct adfs_inode_info *ADFS_I(struct inode *inode)

{

        return container_of(inode, struct adfs_inode_info, vfs_inode);

}

#endif

#endif