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/*
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 * exportfs.h - definitions for exporting file server
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 */
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#define DEBUG		if(!dbg){}else fprint
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#define DFD		9
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#define fidhash(s)	fhash[s%FHASHSIZE]
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typedef struct Fsrpc Fsrpc;
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typedef struct Fid Fid;
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typedef struct File File;
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typedef struct Proc Proc;
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typedef struct Qidtab Qidtab;
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struct Fsrpc
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{
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	int	busy;		/* Work buffer has pending rpc to service */
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	uintptr	pid;		/* Pid of slave process executing the rpc */
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	int	canint;		/* Interrupt gate */
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	int	flushtag;	/* Tag on which to reply to flush */
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	Fcall	work;		/* Plan 9 incoming Fcall */
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	uchar	*buf;		/* Data buffer */
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};
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struct Fid
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{
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	int	fid;		/* system fd for i/o */
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	File	*f;		/* File attached to this fid */
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	int	mode;
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	int	nr;		/* fid number */
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	int	mid;		/* Mount id */
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	Fid	*next;		/* hash link */
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	/* for preaddir -- ARRGH! */
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	Dir	*dir;		/* buffer for reading directories */
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	int	ndir;		/* number of entries in dir */
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	int	cdir;		/* number of consumed entries in dir */
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	int	gdir;		/* glue index */
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	vlong	offset;		/* offset in virtual directory */
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};
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struct File
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{
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	char	*name;
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	int	ref;
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	Qid	qid;
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	Qidtab	*qidt;
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	int	inval;
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	File	*parent;
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	File	*child;
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	File	*childlist;
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};
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struct Proc
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{
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	uintptr	pid;
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	int	busy;
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	Proc	*next;
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};
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struct Qidtab
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{
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	int	ref;
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	int	type;
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	int	dev;
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	vlong	path;
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	vlong	uniqpath;
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	Qidtab	*next;
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};
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enum
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{
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	MAXPROC		= 50,
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	FHASHSIZE	= 64,
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	Nr_workbufs 	= 50,
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	Fidchunk	= 1000,
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	Npsmpt		= 32,
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	Nqidbits		= 5,
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	Nqidtab		= (1<<Nqidbits),
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};
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char Ebadfid[];
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char Enotdir[];
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char Edupfid[];
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char Eopen[];
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char Exmnt[];
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char Enomem[];
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char Emip[];
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char Enopsmt[];
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Extern Fsrpc	*Workq;
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Extern int  	dbg;
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Extern File	*root;
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Extern File	*psmpt;
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Extern Fid	**fhash;
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Extern Fid	*fidfree;
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Extern Proc	*Proclist;
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Extern char	psmap[Npsmpt];
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Extern Qidtab	*qidtab[Nqidtab];
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Extern ulong	messagesize;
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Extern char	Enomem[];
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Extern int	srvfd;
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Extern char*	patternfile;
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/* File system protocol service procedures */
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void Xattach(Fsrpc*);
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void Xauth(Fsrpc*);
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void Xclunk(Fsrpc*);
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void Xcreate(Fsrpc*);
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void Xflush(Fsrpc*);
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void Xnop(Fsrpc*);
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void Xremove(Fsrpc*);
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void Xstat(Fsrpc*);
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void Xversion(Fsrpc*);
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void Xwalk(Fsrpc*);
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void Xwstat(Fsrpc*);
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void slave(Fsrpc*);
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void	reply(Fcall*, Fcall*, char*);
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Fid 	*getfid(int);
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int	freefid(int);
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Fid	*newfid(int);
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Fsrpc	*getsbuf(void);
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void	initroot(void);
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void	fatal(char*, ...);
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char*	makepath(File*, char*);
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File	*file(File*, char*);
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void	freefile(File*);
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void	slaveopen(Fsrpc*);
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void	slaveread(Fsrpc*);
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void	slavewrite(Fsrpc*);
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void	blockingslave(void);
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void	reopen(Fid *f);
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void	noteproc(int, char*);
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void	flushaction(void*, char*);
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void	pushfcall(char*);
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Qidtab* uniqueqid(Dir*);
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void	freeqid(Qidtab*);
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char*	estrdup(char*);
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void*	emallocz(uint);
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int	readmessage(int, char*, int);
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void	exclusions(void);
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int	excludefile(char*);
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int	preaddir(Fid*, uchar*, int, vlong);