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#ifndef _LINUX_MINIX_FS_H

#define _LINUX_MINIX_FS_H

/*

 * The minix filesystem constants/structures

 */

/*

 * Thanks to Kees J Bot for sending me the definitions of the new

 * minix filesystem (aka V2) with bigger inodes and 32-bit block

 * pointers.

 */

#define MINIX_ROOT_INO 1

/* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */

#define MINIX_LINK_MAX  250

#define MINIX_I_MAP_SLOTS       8

#define MINIX_Z_MAP_SLOTS       64

#define MINIX_SUPER_MAGIC       0x137F          /* original minix fs */

#define MINIX_SUPER_MAGIC2      0x138F          /* minix fs, 30 char names */

#define MINIX2_SUPER_MAGIC      0x2468          /* minix V2 fs */

#define MINIX2_SUPER_MAGIC2     0x2478          /* minix V2 fs, 30 char names */

#define MINIX_VALID_FS          0x0001          /* Clean fs. */

#define MINIX_ERROR_FS          0x0002          /* fs has errors. */

#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))

#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))

#define MINIX_V1                0x0001          /* original minix fs */

#define MINIX_V2                0x0002          /* minix V2 fs */

#define INODE_VERSION(inode)    inode->i_sb->u.minix_sb.s_version

/*

 * This is the original minix inode layout on disk.

 * Note the 8-bit gid and atime and ctime.

 */

struct minix_inode {

        __u16 i_mode;

        __u16 i_uid;

        __u32 i_size;

        __u32 i_time;

        __u8  i_gid;

        __u8  i_nlinks;

        __u16 i_zone[9];

};

/*

 * The new minix inode has all the time entries, as well as

 * long block numbers and a third indirect block (7+1+1+1

 * instead of 7+1+1). Also, some previously 8-bit values are

 * now 16-bit. The inode is now 64 bytes instead of 32.

 */

struct minix2_inode {

        __u16 i_mode;

        __u16 i_nlinks;

        __u16 i_uid;

        __u16 i_gid;

        __u32 i_size;

        __u32 i_atime;

        __u32 i_mtime;

        __u32 i_ctime;

        __u32 i_zone[10];

};

/*

 * minix super-block data on disk

 */

struct minix_super_block {

        __u16 s_ninodes;

        __u16 s_nzones;

        __u16 s_imap_blocks;

        __u16 s_zmap_blocks;

        __u16 s_firstdatazone;

        __u16 s_log_zone_size;

        __u32 s_max_size;

        __u16 s_magic;

        __u16 s_state;

        __u32 s_zones;

};

struct minix_dir_entry {

        __u16 inode;

        char name[0];

};

#ifdef __KERNEL__

extern int minix_lookup(struct inode * dir,const char * name, int len,

                        struct inode ** result);

extern int minix_create(struct inode * dir,const char * name, int len, int mode,

        struct inode ** result);

extern int minix_mkdir(struct inode * dir, const char * name, int len, int mode);

extern int minix_rmdir(struct inode * dir, const char * name, int len);

extern int minix_unlink(struct inode * dir, const char * name, int len);

extern int minix_symlink(struct inode * inode, const char * name, int len,

        const char * symname);

extern int minix_link(struct inode * oldinode, struct inode * dir, const char * name, int len);

extern int minix_mknod(struct inode * dir, const char * name, int len, int mode, int rdev);

extern int minix_rename(struct inode * old_dir, const char * old_name, int old_len,

        struct inode * new_dir, const char * new_name, int new_len, int must_be_dir);

extern struct inode * minix_new_inode(const struct inode * dir);

extern void minix_free_inode(struct inode * inode);

extern unsigned long minix_count_free_inodes(struct super_block *sb);

extern int minix_new_block(struct super_block * sb);

extern void minix_free_block(struct super_block * sb, int block);

extern unsigned long minix_count_free_blocks(struct super_block *sb);

extern int minix_bmap(struct inode *,int);

extern struct buffer_head * minix_getblk(struct inode *, int, int);

extern struct buffer_head * minix_bread(struct inode *, int, int);

extern void minix_truncate(struct inode *);

extern void minix_put_super(struct super_block *);

extern struct super_block *minix_read_super(struct super_block *,void *,int);

extern int init_minix_fs(void);

extern void minix_write_super(struct super_block *);

extern int minix_remount (struct super_block * sb, int * flags, char * data);

extern void minix_read_inode(struct inode *);

extern void minix_write_inode(struct inode *);

extern void minix_put_inode(struct inode *);

extern void minix_statfs(struct super_block *, struct statfs *, int);

extern int minix_sync_inode(struct inode *);

extern int minix_sync_file(struct inode *, struct file *);

extern struct inode_operations minix_file_inode_operations;

extern struct inode_operations minix_dir_inode_operations;

extern struct inode_operations minix_symlink_inode_operations;

#endif /* __KERNEL__ */

#endif