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#ifndef _LINUX_EXT_FS_H

#define _LINUX_EXT_FS_H

/*

 * The ext filesystem constants/structures

 */

#define EXT_NAME_LEN 255

#define EXT_ROOT_INO 1

#define EXT_SUPER_MAGIC 0x137D

#define EXT_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct ext_inode)))

struct ext_inode {

        unsigned short i_mode;

        unsigned short i_uid;

        unsigned long i_size;

        unsigned long i_time;

        unsigned short i_gid;

        unsigned short i_nlinks;

        unsigned long i_zone[12];

};

struct ext_free_inode {

        unsigned long count;

        unsigned long free[14];

        unsigned long next;

};

struct ext_free_block {

        unsigned long count;

        unsigned long free[254];

        unsigned long next;

};

struct ext_super_block {

        unsigned long s_ninodes;

        unsigned long s_nzones;

        unsigned long s_firstfreeblock;

        unsigned long s_freeblockscount;

        unsigned long s_firstfreeinode;

        unsigned long s_freeinodescount;

        unsigned long s_firstdatazone;

        unsigned long s_log_zone_size;

        unsigned long s_max_size;

        unsigned long s_reserved1;

        unsigned long s_reserved2;

        unsigned long s_reserved3;

        unsigned long s_reserved4;

        unsigned long s_reserved5;

        unsigned short s_magic;

};

struct ext_dir_entry {

        unsigned long inode;

        unsigned short rec_len;

        unsigned short name_len;

        char name[EXT_NAME_LEN];

};

#ifdef __KERNEL__

extern int ext_open(struct inode * inode, struct file * filp);

extern void ext_release(struct inode * inode, struct file * filp);

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

                      struct inode ** result);

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

        struct inode ** result);

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

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

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

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

        const char * symname);

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

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

extern int ext_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 * ext_new_inode(const struct inode * dir);

extern void ext_free_inode(struct inode * inode);

extern unsigned long ext_count_free_inodes(struct super_block *sb);

extern int ext_new_block(struct super_block * sb);

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

extern unsigned long ext_count_free_blocks(struct super_block *sb);

extern int ext_bmap(struct inode *,int);

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

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

extern void ext_truncate(struct inode *);

extern void ext_put_super(struct super_block *);

extern void ext_write_super(struct super_block *);

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

extern int init_ext_fs(void);

extern void ext_read_inode(struct inode *);

extern void ext_write_inode(struct inode *);

extern void ext_put_inode(struct inode *);

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

extern int ext_sync_inode(struct inode *);

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

extern int ext_lseek(struct inode *, struct file *, off_t, int);

extern int ext_read(struct inode *, struct file *, char *, int);

extern int ext_write(struct inode *, struct file *, char *, int);

extern struct inode_operations ext_file_inode_operations;

extern struct inode_operations ext_dir_inode_operations;

extern struct inode_operations ext_symlink_inode_operations;

#endif /*__KERNEL__ */

#endif