/*  * 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. */ typedef struct Ibuf	Ibuf;typedef struct Imap	Imap;typedef struct Icache	Icache; enum{	Nicache=	64,		/* number of inodes kept in pool */}; /* *  a cached inode buffer */struct Ibuf{	Lru;			/* must be first in structure */	int	inuse;		/* non-0 if in use */	ulong	ino;		/* index into inode table */	Inode	inode;		/* the inode contents */}; /* *  in-core qid to inode mapping */struct Imap{	Lru;			/* must be first in structure */	Qid	qid;	Ibuf	*b;		/* cache buffer */	int	inuse;		/* non-0 if in use */}; /* *  the inode cache */struct Icache{	Disk; 	int	nino;		/* number of inodes */	ulong	ib0;		/* first inode block */	int	nib;		/* number of inode blocks */	int	i2b;		/* inodes to a block */ 	Ibuf	ib[Nicache];	/* inode buffers */	Lru	blru; 	Imap	*map;		/* inode to qid mapping */	Lru	mlru;}; Ibuf*	ialloc(Icache*, ulong);Ibuf*	iget(Icache*, Qid);Ibuf*	iread(Icache*, ulong);int	iformat(Icache*, int, ulong, char*, int, int);int	iinit(Icache*, int, int, char*);int	iremove(Icache*, ulong);int	iupdate(Icache*, ulong, Qid);int	iwrite(Icache*, Ibuf*);void	ifree(Icache*, Ibuf*);void	iinc(Icache*, Ibuf*);