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2 - 1 
#define	DIRREC		116		/* size of a directory ascii record */
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#define	ERRREC		64		/* size of a error record */
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#define	MAXMSG		160	/* max header sans data */
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typedef	struct	Oldfcall	Oldfcall;
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struct	Oldfcall
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{
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	char	type;
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	ushort	fid;
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	short	err;
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	short	tag;
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	union
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	{
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		struct
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		{
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			short	uid;		/* T-Userstr */
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			short	oldtag;		/* T-nFlush */
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			Qid9p1	qid;		/* R-Attach, R-Clwalk, R-Walk,
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						 * R-Open, R-Create */
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			char	rauth[AUTHENTLEN];	/* R-attach */
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		};
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		struct
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		{
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			char	uname[NAMELEN];	/* T-nAttach */
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			char	aname[NAMELEN];	/* T-nAttach */
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			char	ticket[TICKETLEN];	/* T-attach */
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			char	auth[AUTHENTLEN];	/* T-attach */
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		};
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		struct
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		{
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			char	ename[ERRREC];	/* R-nError */
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			char	chal[CHALLEN];	/* T-session, R-session */
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			char	authid[NAMELEN];	/* R-session */
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			char	authdom[DOMLEN];	/* R-session */
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		};
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		struct
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		{
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			char	name[NAMELEN];	/* T-Walk, T-Clwalk, T-Create, T-Remove */
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			long	perm;		/* T-Create */
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			ushort	newfid;		/* T-Clone, T-Clwalk */
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			char	mode;		/* T-Create, T-Open */
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		};
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		struct
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		{
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			long	offset;		/* T-Read, T-Write */
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			long	count;		/* T-Read, T-Write, R-Read */
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			char*	data;		/* T-Write, R-Read */
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		};
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		struct
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		{
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			char	stat[DIRREC];	/* T-Wstat, R-Stat */
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		};
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	};
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};
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/*
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 * P9 protocol message types
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 */
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enum
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{
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	Tnop9p1 =		50,
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	Rnop9p1,
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	Tosession9p1 =	52,
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	Rosession9p1,
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	Terror9p1 =	54,	/* illegal */
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	Rerror9p1,
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	Tflush9p1 =	56,
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	Rflush9p1,
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	Toattach9p1 =	58,
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	Roattach9p1,
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	Tclone9p1 =	60,
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	Rclone9p1,
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	Twalk9p1 =		62,
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	Rwalk9p1,
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	Topen9p1 =		64,
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	Ropen9p1,
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	Tcreate9p1 =	66,
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	Rcreate9p1,
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	Tread9p1 =		68,
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	Rread9p1,
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	Twrite9p1 =	70,
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	Rwrite9p1,
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	Tclunk9p1 =	72,
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	Rclunk9p1,
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	Tremove9p1 =	74,
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	Rremove9p1,
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	Tstat9p1 =		76,
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	Rstat9p1,
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	Twstat9p1 =	78,
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	Rwstat9p1,
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	Tclwalk9p1 =	80,
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	Rclwalk9p1,
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	Tauth9p1 =		82,	/* illegal */
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	Rauth9p1,			/* illegal */
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	Tsession9p1 =	84,
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	Rsession9p1,
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	Tattach9p1 =	86,
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	Rattach9p1,
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	MAXSYSCALL
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};
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int	convD2M9p1(Dentry*, char*);
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int	convM2D9p1(char*, Dentry*);
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int	convM2S9p1(uchar*, Oldfcall*, int);
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int	convS2M9p1(Oldfcall*, uchar*);
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void	fcall9p1(Chan*, Oldfcall*, Oldfcall*);
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int	authorize(Chan*, Oldfcall*, Oldfcall*);
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void	(*call9p1[MAXSYSCALL])(Chan*, Oldfcall*, Oldfcall*);
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extern Nvrsafe nvr;