/*
 * fundamental constants
 */
#define	ERRREC		64		/* size of a ascii erro message */
#define	DIRREC		116		/* size of a directory ascii record */
#define	NAMELEN		28		/* size of names */
#define	NDBLOCK		6		/* number of direct blocks in Dentry */
#define	MAXDAT		8192		/* max allowable data message */
#define	MAXMSG		128		/* max size protocol message sans data */
#define NTLOCK		200		/* number of active file Tlocks */

typedef	struct	Fbuf	Fbuf;
typedef	struct	Super1	Super1;
typedef	struct	Superb	Superb;
typedef struct	Qid	Qid;
typedef	struct	Dentry	Dentry;
typedef	struct	Tag	Tag;

/*
 * DONT TOUCH -- data structures stored on disk
 */
/* DONT TOUCH, this is the disk structure */
struct	Qid
{
	long	path;
	long	version;
};

/* 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
	Qid	qid;
	long	size;
	long	dblock[NDBLOCK];
	long	iblock;
	long	diblock;
	long	atime;
	long	mtime;
};

/* DONT TOUCH, this is the disk structure */
struct	Tag
{
	short	pad;
	short	tag;
	long	path;
};

/* DONT TOUCH, this is the disk structure */
struct	Super1
{
	long	fstart;
	long	fsize;
	long	tfree;
	long	qidgen;		/* generator for unique ids */

	long	fsok;		/* file system ok */

	/*
	 * garbage for WWC device
	 */
	long	roraddr;	/* dump root addr */
	long	last;		/* last super block addr */
	long	next;		/* next super block addr */
};

/* DONT TOUCH, this is the disk structure */
struct	Fbuf
{
	long	nfree;
	long	free[1];		/* changes based on BUFSIZE */
};

/* DONT TOUCH, this is the disk structure */
struct	Superb
{
	Super1	super;
	Fbuf	fbuf;
};

/*
 * tags on block
 */
enum
{
	Tnone		= 0,
	Tsuper,			/* the super block */
	Tdir,			/* directory contents */
	Tind1,			/* points to blocks */
	Tind2,			/* points to Tind1 */
	Tfile,			/* file contents */
	Tfree,			/* in free list */
	Tbuck,			/* cache fs bucket */
	Tvirgo,			/* fake worm virgin bits */
	Tcache,			/* cw cache things */
	MAXTAG
};

/*
 * buffer size variables
 */
extern int	RBUFSIZE;
extern int	BUFSIZE;
extern int	DIRPERBUF;
extern int	INDPERBUF;
extern int	INDPERBUF2;
extern int	FEPERBUF;

#define        QPDIR   0x80000000L
#define        QPNONE  0
#define        QPROOT  1
#define        QPSUPER 2
#define        QID(a,b)        (Qid){a,b}