#pragma src "/sys/src/lib9p"#pragma lib "lib9p.a" /* * Maps from ulongs to void*s. */typedef struct Intmap	Intmap; Intmap*	allocmap(void (*inc)(void*));void		freemap(Intmap*, void (*destroy)(void*));void*	lookupkey(Intmap*, ulong);void*	insertkey(Intmap*, ulong, void*);int		caninsertkey(Intmap*, ulong, void*);void*	deletekey(Intmap*, ulong); /* * Fid and Request structures. */typedef struct Fid		Fid;typedef struct Req		Req;typedef struct Fidpool	Fidpool;typedef struct Reqpool	Reqpool;typedef struct File		File;typedef struct Filelist	Filelist;typedef struct Tree		Tree;typedef struct Readdir	Readdir;typedef struct Srv Srv; struct Fid{	ulong	fid;	char		omode;	/* -1 = not open */	File*		file;	char*	uid;	Qid		qid;	void*	aux; /* below is implementation-specific; don't use */	Readdir*	rdir;	Ref		ref;	Fidpool*	pool;	vlong	diroffset;	long		dirindex;}; struct Req{	ulong	tag;	void*	aux;	Fcall		ifcall;	Fcall		ofcall;	Dir		d;	Req*		oldreq;	Fid*		fid;	Fid*		afid;	Fid*		newfid;	Srv*		srv; /* below is implementation-specific; don't use */	Ref		ref;	Reqpool*	pool;	uchar*	buf;	uchar	type;	uchar	responded;	char*	error;	void*	rbuf;}; /* * Pools to maintain Fid <-> fid and Req <-> tag maps. */ struct Fidpool {	Intmap	*map;	void		(*destroy)(Fid*);	Srv		*srv;}; struct Reqpool {	Intmap	*map;	void		(*destroy)(Req*);	Srv		*srv;}; Fidpool*	allocfidpool(void (*destroy)(Fid*));void		freefidpool(Fidpool*);Fid*		allocfid(Fidpool*, ulong);Fid*		lookupfid(Fidpool*, ulong);void		closefid(Fid*);Fid*		removefid(Fidpool*, ulong); Reqpool*	allocreqpool(void (*destroy)(Req*));void		freereqpool(Reqpool*);Req*		allocreq(Reqpool*, ulong);Req*		lookupreq(Reqpool*, ulong);void		closereq(Req*);Req*		removereq(Reqpool*, ulong); typedef	int	Dirgen(int, Dir*, void*);void		dirread9p(Req*, Dirgen*, void*); /* * File trees. */struct File {	Ref;	Dir;	File *parent;	void *aux; /* below is implementation-specific; don't use */	RWLock;	Filelist *filelist;	Tree *tree;	int nchild;	int allocd;}; struct Tree {	File *root;	void	(*destroy)(File *file); /* below is implementation-specific; don't use */	Lock genlock;	ulong qidgen;	ulong dirqidgen;}; Tree*	alloctree(char*, char*, ulong, void(*destroy)(File*));void		freetree(Tree*);File*		createfile(File*, char*, char*, ulong, void*);int		removefile(File*);void		closefile(File*);File*		walkfile(File*, char*);Readdir*	opendirfile(File*);long		readdirfile(Readdir*, uchar*, long);void		closedirfile(Readdir*); /* * File service loop. */struct Srv {	Tree*	tree;	void		(*destroyfid)(Fid*);	void		(*destroyreq)(Req*);	void		(*end)(Srv*);	void*	aux; 	void		(*attach)(Req*);	void		(*auth)(Req*);	void		(*open)(Req*);	void		(*create)(Req*);	void		(*read)(Req*);	void		(*write)(Req*);	void		(*remove)(Req*);	void		(*flush)(Req*);	void		(*stat)(Req*);	void		(*wstat)(Req*);	void		(*walk)(Req*);	char*	(*clone)(Fid*, Fid*);	char*	(*walk1)(Fid*, char*, Qid*); 	int		infd;	int		outfd;	int		nopipe;	int		srvfd; /* below is implementation-specific; don't use */	Fidpool*	fpool;	Reqpool*	rpool;	uint		msize; 	uchar*	rbuf;	QLock	rlock;	uchar*	wbuf;	QLock	wlock;}; void		srv(Srv*);void		postmountsrv(Srv*, char*, char*, int);int 		postfd(char*, int);int		chatty9p;void		respond(Req*, char*);void		threadpostmountsrv(Srv*, char*, char*, int); /* * Helper.  Assumes user is same as group. */int		hasperm(File*, char*, int); void*	emalloc9p(ulong);void*	erealloc9p(void*, ulong);char*	estrdup9p(char*); enum {	OMASK = 3}; void readstr(Req*, char*);void readbuf(Req*, void*, long);