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typedef	struct	Chan	Chan;
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typedef struct	Command	Command;
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typedef	struct	Conf	Conf;
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typedef	struct	Cons	Cons;
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typedef struct	Devcall	Devcall;
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#define MAXBUFSIZE	(16*1024)	/* max. buffer size */
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#include "portdat.h"
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struct	Chan
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{
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	int	chan;			/* fd request came in on */
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	QLock rlock, wlock;		/* lock for reading/writing messages on chan */
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	int	type;
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	int	flags;
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	long	whotime;
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	File*	flist;			/* base of file structures */
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	Lock	flock;			/* manipulate flist */
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	RWLock	reflock;		/* lock for Tflush */
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	int	msize;			/* version */
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	int	authed;		/* someone other than ``none'' has authed */
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/* 9p1 auth */
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	uchar	chal[8];
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	uchar	rchal[8];
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	int	idoffset;
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	int	idvec;
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	Lock	idlock;
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};
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/*
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 * console cons.flag flags
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 */
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enum
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{
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	Fchat	= (1<<0),	/* print out filesys rpc traffic */
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	Fuid	= (1<<2),	/* print out uids */
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				/* debugging flags for drivers */
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};
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struct	Cons
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{
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	int	flags;		/* overall flags for all channels */
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	int	uid;		/* botch -- used to get uid on cons_create */
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	int	gid;		/* botch -- used to get gid on cons_create */
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	int	allow;		/* no-protection flag */
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	long	offset;		/* used to read files, c.f. fchar */
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	char*	arg;		/* pointer to remaining line */
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	Chan	*chan;	/* console channel */
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	Chan	*srvchan;	/* local server channel */
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	Filter	work;		/* thruput in messages */
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	Filter	rate;		/* thruput in bytes */
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	Filter	bhit;		/* getbufs that hit */
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	Filter	bread;		/* getbufs that miss and read */
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	Filter	binit;		/* getbufs that miss and dont read */
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	Filter	tags[MAXTAG];	/* reads of each type of block */
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};
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struct	Conf
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{
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	ulong	niobuf;		/* number of iobufs to allocate */
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	ulong	nuid;		/* distinct uids */
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	ulong	uidspace;	/* space for uid names -- derrived from nuid */
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	ulong	gidspace;	/* space for gid names -- derrived from nuid */
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	ulong	nserve;		/* server processes */
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	ulong	nfile;		/* number of fid -- system wide */
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	ulong	nwpath;		/* number of active paths, derrived from nfile */
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	ulong	bootsize;	/* number of bytes reserved for booting */
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};
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struct	Command
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{
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	char	*string;
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	void	(*func)(void);
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	char	*args;
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};
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struct Devcall
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{
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	void	(*init)(Device);
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	void	(*ream)(Device);
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	int	(*check)(Device);
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	long	(*super)(Device);
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	long	(*root)(Device);
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	long	(*size)(Device);
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	int	(*read)(Device, long, void*);
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	int	(*write)(Device, long, void*);
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};
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/*
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 * device types
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 */
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enum
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{
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	Devnone 	= 0,
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	Devwren,
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	MAXDEV
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};
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/*
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 * file systems
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 */
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enum
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{
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	MAXFILSYS = 4
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};
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/*
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 * should be in portdat.h
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 */
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#define	QPDIR	0x80000000L
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#define	QPNONE	0
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#define	QPROOT	1
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#define	QPSUPER	2
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/*
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 * perm argument in p9 create
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 */
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#define	PDIR	(1L<<31)	/* is a directory */
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#define	PAPND	(1L<<30)	/* is append only */
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#define	PLOCK	(1L<<29)	/* is locked on open */
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#define	NOF	(-1)
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#define	FID1		1
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#define	FID2		2
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#define	FID3		3
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#define SECOND(n) 	(n)
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#define MINUTE(n)	(n*SECOND(60))
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#define HOUR(n)		(n*MINUTE(60))
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#define DAY(n)		(n*HOUR(24))
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#define	TLOCK		MINUTE(5)
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#define	CHAT(cp)	(chat)
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#define	QID9P1(a,b)	(Qid9p1){a,b}
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extern	Uid*	uid;
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extern	char*	uidspace;
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extern	short*	gidspace;
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extern	char*	errstring[MAXERR];
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extern	Chan*	chans;
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extern	RWLock	mainlock;
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extern	long	boottime;
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extern	Tlock	*tlocks;
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extern	Device	devnone;
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extern	Filsys	filesys[];
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extern	char	service[];
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extern	char*	tagnames[];
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extern	Conf	conf;
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extern	Cons	cons;
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extern	Command	command[];
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extern	Chan	*chan;
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extern	Devcall	devcall[];
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extern	char	*progname;
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extern	char	*procname;
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extern	long	niob;
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extern	long	nhiob;
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extern	Hiob	*hiob;
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extern	int	chat;
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extern	int	writeallow;
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extern	int	wstatallow;
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extern	int	allownone;
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extern	int	noatime;
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extern	int	writegroup;
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extern Lock wpathlock;