/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #define Rendez KRendez typedef struct Block	Block;typedef struct Chan	Chan;typedef struct Cname	Cname;typedef struct Dev	Dev;typedef struct Dirtab	Dirtab;typedef struct Proc	Proc;typedef struct Ref	Ref;typedef struct Rendez	Rendez;typedef struct Walkqid Walkqid;typedef int    Devgen(Chan*, Dirtab*, int, int, Dir*); enum{	KNAMELEN	= 28,	NERR		= 15, 	COPEN		= 0x0001,		/* for i/o */	CFREE		= 0x0010,		/* not in use */}; struct Ref{	Lock;	int	ref;}; struct Rendez{	Lock;	Proc	*p;}; struct Chan{	Ref;	Chan*	next;			/* allocation */	Chan*	link;	vlong	offset;			/* in file */	ushort	type;	ulong	dev;	ushort	mode;			/* read/write */	ushort	flag;	Qid	qid;	int	fid;			/* for devmnt */	ulong	iounit;			/* chunk size for i/o; 0==default */	void*	aux;	Cname	*name;}; struct Cname{	Ref;	int	alen;			/* allocated length */	int	len;			/* strlen(s) */	char	*s;}; struct Dev{	int	dc;	char*	name; 	void	(*reset)(void);	void	(*init)(void);	Chan*	(*attach)(char*);	Walkqid*	(*walk)(Chan*, Chan*, char**, int);	int	(*stat)(Chan*, uchar*, int);	Chan*	(*open)(Chan*, int);	void	(*create)(Chan*, char*, int, ulong);	void	(*close)(Chan*);	long	(*read)(Chan*, void*, long, vlong);	Block*	(*bread)(Chan*, long, ulong);	long	(*write)(Chan*, void*, long, vlong);	long	(*bwrite)(Chan*, Block*, ulong);	void	(*remove)(Chan*);	int	(*wstat)(Chan*, uchar*, int);}; struct Dirtab{	char	name[KNAMELEN];	Qid	qid;	vlong length;	long	perm;}; struct Walkqid{	Chan	*clone;	int	nqid;	Qid	qid[1];}; struct Proc{	Lock	rlock;		/* for rendsleep, rendwakeup, intr */	Rendez	*r;	int	intr; 	char	name[KNAMELEN];	char	*user;	char	error[ERRMAX];	int	nerrlab;	jmp_buf	errlab[NERR];	char	genbuf[128];	/* buffer used e.g. for last name element from namec */}; #define DEVDOTDOT -1 extern	Proc	**privup;#define	up	(*privup)extern  char	*eve;extern	Dev*	devtab[]; Chan*		cclone(Chan*);void		cclose(Chan*);void		cnameclose(Cname*);int		decref(Ref*);Chan*		devattach(int, char*);Block*		devbread(Chan*, long, ulong);long		devbwrite(Chan*, Block*, ulong);void		devcreate(Chan*, char*, int, ulong);void		devdir(Chan*, Qid, char*, vlong, char*, long, Dir*);long		devdirread(Chan*, char*, long, Dirtab*, int, Devgen*);Devgen		devgen;void		devinit(void);Chan*		devopen(Chan*, int, Dirtab*, int, Devgen*);void		devremove(Chan*);void		devreset(void);int		devstat(Chan*, uchar*, int, Dirtab*, int, Devgen*);Walkqid*		devwalk(Chan*, Chan*, char**, int, Dirtab*, int, Devgen*);int		devwstat(Chan*, uchar*, int);void		error(char*);int		incref(Ref*);void		isdir(Chan*);void		kproc(char*, void(*)(void*), void*);void		mkqid(Qid*, vlong, ulong, int);void		nexterror(void);Chan*		newchan(void);Cname*		newcname(char*);int		openmode(ulong);void		panic(char*, ...);int		readstr(ulong, char*, ulong, char*);long		seconds(void);void*		smalloc(ulong); #define		poperror()	up->nerrlab--#define		waserror()	(up->nerrlab++, setjmp(up->errlab[up->nerrlab-1])) void		initcompat(void);void		rendintr(void *v);void		rendclearintr(void);void		rendsleep(Rendez*, int(*)(void*), void*);int		rendwakeup(Rendez*);void		kexit(void);int		sysexport(int fd, Chan **roots, int nroots);int		errdepth(int ed);void		newup(char *name); int		exporter(Dev**, int*, int*);int		mounter(char *mntpt, int how, int fds, int n);void		shutdown(void); void		screeninit(int, int, char*); #pragma	varargck	argpos	panic		1