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#ifndef AMIGAFFS_H

#define AMIGAFFS_H

#include <linux/types.h>

#include <linux/locks.h>

#include <asm/byteorder.h>

/* AmigaOS allows file names with up to 30 characters length.

 * Names longer than that will be silently truncated. If you

 * want to disallow this, comment out the following #define.

 * Creating filesystem objects with longer names will then

 * result in an error (ENAMETOOLONG).

 */

/*#define AFFS_NO_TRUNCATE */

/* Ugly macros make the code more pretty. */

#define GET_END_PTR(st,p,sz)             ((st *)((char *)(p)+((sz)-sizeof(st))))

#define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])

#define AFFS_BLOCK(sb, bh, blk)         (AFFS_HEAD(bh)->table[(sb)->u.affs_sb.s_hashsize-1-(blk)])

static inline void

affs_set_blocksize(struct super_block *sb, int size)

{

        set_blocksize(sb->s_dev, size);

        sb->s_blocksize = size;

}

static inline struct buffer_head *

affs_bread(struct super_block *sb, int block)

{

        pr_debug(KERN_DEBUG "affs_bread: %d\n", block);

        if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size)

                return sb_bread(sb, block);

        return NULL;

}

static inline struct buffer_head *

affs_getblk(struct super_block *sb, int block)

{

        pr_debug(KERN_DEBUG "affs_getblk: %d\n", block);

        if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size)

                return sb_getblk(sb, block);

        return NULL;

}

static inline struct buffer_head *

affs_getzeroblk(struct super_block *sb, int block)

{

        struct buffer_head *bh;

        pr_debug(KERN_DEBUG "affs_getzeroblk: %d\n", block);

        if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size) {

                bh = sb_getblk(sb, block);

                lock_buffer(bh);

                memset(bh->b_data, 0 , sb->s_blocksize);

                mark_buffer_uptodate(bh, 1);

                unlock_buffer(bh);

                return bh;

        }

        return NULL;

}

static inline struct buffer_head *

affs_getemptyblk(struct super_block *sb, int block)

{

        struct buffer_head *bh;

        pr_debug(KERN_DEBUG "affs_getemptyblk: %d\n", block);

        if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size) {

                bh = sb_getblk(sb, block);

                wait_on_buffer(bh);

                mark_buffer_uptodate(bh, 1);

                return bh;

        }

        return NULL;

}

static inline void

affs_brelse(struct buffer_head *bh)

{

        if (bh)

                pr_debug(KERN_DEBUG "affs_brelse: %ld\n", bh->b_blocknr);

        brelse(bh);

}

static inline void

affs_adjust_checksum(struct buffer_head *bh, u32 val)

{

        u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[5]);

        ((u32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);

}

static inline void

affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)

{

        u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[0]);

        ((u32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);

}

static inline void

affs_lock_link(struct inode *inode)

{

        down(&AFFS_INODE->i_link_lock);

}

static inline void

affs_unlock_link(struct inode *inode)

{

        up(&AFFS_INODE->i_link_lock);

}

static inline void

affs_lock_dir(struct inode *inode)

{

        down(&AFFS_INODE->i_hash_lock);

}

static inline void

affs_unlock_dir(struct inode *inode)

{

        up(&AFFS_INODE->i_hash_lock);

}

static inline void

affs_lock_ext(struct inode *inode)

{

        down(&AFFS_INODE->i_ext_lock);

}

static inline void

affs_unlock_ext(struct inode *inode)

{

        up(&AFFS_INODE->i_ext_lock);

}

#ifdef __LITTLE_ENDIAN

#define BO_EXBITS       0x18UL

#elif defined(__BIG_ENDIAN)

#define BO_EXBITS       0x00UL

#else

#error Endianness must be known for affs to work.

#endif

#define FS_OFS          0x444F5300

#define FS_FFS          0x444F5301

#define FS_INTLOFS      0x444F5302

#define FS_INTLFFS      0x444F5303

#define FS_DCOFS        0x444F5304

#define FS_DCFFS        0x444F5305

#define MUFS_FS         0x6d754653   /* 'muFS' */

#define MUFS_OFS        0x6d754600   /* 'muF\0' */

#define MUFS_FFS        0x6d754601   /* 'muF\1' */

#define MUFS_INTLOFS    0x6d754602   /* 'muF\2' */

#define MUFS_INTLFFS    0x6d754603   /* 'muF\3' */

#define MUFS_DCOFS      0x6d754604   /* 'muF\4' */

#define MUFS_DCFFS      0x6d754605   /* 'muF\5' */

#define T_SHORT         2

#define T_LIST          16

#define T_DATA          8

#define ST_LINKFILE     -4

#define ST_FILE         -3

#define ST_ROOT         1

#define ST_USERDIR      2

#define ST_SOFTLINK     3

#define ST_LINKDIR      4

#define AFFS_ROOT_BMAPS         25

#define AFFS_HEAD(bh)           ((struct affs_head *)(bh)->b_data)

#define AFFS_TAIL(sb, bh)       ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))

#define AFFS_ROOT_HEAD(bh)      ((struct affs_root_head *)(bh)->b_data)

#define AFFS_ROOT_TAIL(sb, bh)  ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))

#define AFFS_DATA_HEAD(bh)      ((struct affs_data_head *)(bh)->b_data)

#define AFFS_DATA(bh)           (((struct affs_data_head *)(bh)->b_data)->data)

struct affs_date {

        u32 days;

        u32 mins;

        u32 ticks;

};

struct affs_short_date {

        u16 days;

        u16 mins;

        u16 ticks;

};

struct affs_root_head {

        u32 ptype;

        u32 spare1;

        u32 spare2;

        u32 hash_size;

        u32 spare3;

        u32 checksum;

        u32 hashtable[1];

};

struct affs_root_tail {

        u32 bm_flag;

        u32 bm_blk[AFFS_ROOT_BMAPS];

        u32 bm_ext;

        struct affs_date root_change;

        u8 disk_name[32];

        u32 spare1;

        u32 spare2;

        struct affs_date disk_change;

        struct affs_date disk_create;

        u32 spare3;

        u32 spare4;

        u32 dcache;

        u32 stype;

};

struct affs_head {

        u32 ptype;

        u32 key;

        u32 block_count;

        u32 spare1;

        u32 first_data;

        u32 checksum;

        u32 table[1];

};

struct affs_tail {

        u32 spare1;

        u16 uid;

        u16 gid;

        u32 protect;

        u32 size;

        u8 comment[92];

        struct affs_date change;

        u8 name[32];

        u32 spare2;

        u32 original;

        u32 link_chain;

        u32 spare[5];

        u32 hash_chain;

        u32 parent;

        u32 extension;

        u32 stype;

};

struct slink_front

{

        u32 ptype;

        u32 key;

        u32 spare1[3];

        u32 checksum;

        u8 symname[1];  /* depends on block size */

};

struct affs_data_head

{

        u32 ptype;

        u32 key;

        u32 sequence;

        u32 size;

        u32 next;

        u32 checksum;

        u8 data[1];     /* depends on block size */

};

/* Permission bits */

#define FIBF_OTR_READ           0x8000

#define FIBF_OTR_WRITE          0x4000

#define FIBF_OTR_EXECUTE        0x2000

#define FIBF_OTR_DELETE         0x1000

#define FIBF_GRP_READ           0x0800

#define FIBF_GRP_WRITE          0x0400

#define FIBF_GRP_EXECUTE        0x0200

#define FIBF_GRP_DELETE         0x0100

#define FIBF_HIDDEN             0x0080

#define FIBF_SCRIPT             0x0040

#define FIBF_PURE               0x0020          /* no use under linux */

#define FIBF_ARCHIVED           0x0010          /* never set, always cleared on write */

#define FIBF_NOREAD             0x0008          /* 0 means allowed */

#define FIBF_NOWRITE            0x0004          /* 0 means allowed */

#define FIBF_NOEXECUTE          0x0002          /* 0 means allowed, ignored under linux */

#define FIBF_NODELETE           0x0001          /* 0 means allowed */

#define FIBF_OWNER              0x000F          /* Bits pertaining to owner */

#define FIBF_MASK               0xEE0E          /* Bits modified by Linux */

#endif