typedef struct Qid9p1 Qid9p1;typedef struct Dentry Dentry;typedef struct Kfsfile Kfsfile;typedef struct Kfs Kfs; /* DONT TOUCH, this is the disk structure */struct	Qid9p1{	long	path;	long	version;}; //#define	NAMELEN		28		/* size of names */#define	NDBLOCK		6		/* number of direct blocks in Dentry */ /* DONT TOUCH, this is the disk structure */struct	Dentry{	char	name[NAMELEN];	short	uid;	short	gid;	ushort	mode;/*		#define	DALLOC	0x8000		#define	DDIR	0x4000		#define	DAPND	0x2000		#define	DLOCK	0x1000		#define	DREAD	0x4		#define	DWRITE	0x2		#define	DEXEC	0x1*/	Qid9p1	qid;	long	size;	long	dblock[NDBLOCK];	long	iblock;	long	diblock;	long	atime;	long	mtime;}; struct Kfsfile{	Dentry;	long off;}; struct Kfs{	int	RBUFSIZE;	int	BUFSIZE;	int	DIRPERBUF;	int	INDPERBUF;	int	INDPERBUF2;}; extern int kfsinit(Fs*);