Subversion Repositories planix.SVN

/*

 * fundamental constants

 */

#define	NAMELEN		28		/* size of names */

#define	NDBLOCK		6		/* number of direct blocks in Dentry */

#define	MAXDAT		8192		/* max allowable data message */

#define NTLOCK		200		/* number of active file Tlocks */

typedef	struct	Fbuf	Fbuf;

typedef	struct	Super1	Super1;

typedef	struct	Superb	Superb;

// typedef struct	Qid	Qid;

typedef	struct	Dentry	Dentry;

typedef	struct	Tag	Tag;

typedef struct	Device	Device;

typedef struct	Qid9p1	Qid9p1;

typedef	struct	File	File;

typedef	struct	Filsys	Filsys;

typedef	struct	Filta	Filta;

typedef	struct	Filter	Filter;

typedef		ulong	Float;

typedef	struct	Hiob	Hiob;

typedef	struct	Iobuf	Iobuf;

typedef	struct	P9call	P9call;

typedef	struct	Tlock	Tlock;

// typedef	struct	Tm	Tm;

typedef	struct	Uid	Uid;

typedef	struct	Wpath	Wpath;

typedef struct	AuthRpc	AuthRpc;

/*

 * DONT TOUCH -- data structures stored on disk

 */

/* DONT TOUCH, this is the disk structure */

struct	Qid9p1

{

	long	path;

	long	version;

};

/* DONT TOUCH, this is the disk structure */

struct	Dentry

{

	char	name[NAMELEN];

	short	uid;

	short	gid;

	ushort	mode;

		#define	DALLOC	0x8000

		#define	DDIR	0x4000

		#define	DAPND	0x2000

		#define	DLOCK	0x1000

		#define	DREAD	0x4

		#define	DWRITE	0x2

		#define	DEXEC	0x1

	Qid9p1	qid;

	long	size;

	long	dblock[NDBLOCK];

	long	iblock;

	long	diblock;

	long	atime;

	long	mtime;

};

/* DONT TOUCH, this is the disk structure */

struct	Tag

{

	short	pad;

	short	tag;

	long	path;

};

/* DONT TOUCH, this is the disk structure */

struct	Super1

{

	long	fstart;

	long	fsize;

	long	tfree;

	long	qidgen;		/* generator for unique ids */

	long	fsok;		/* file system ok */

	/*

	 * garbage for WWC device

	 */

	long	roraddr;	/* dump root addr */

	long	last;		/* last super block addr */

	long	next;		/* next super block addr */

};

/* DONT TOUCH, this is the disk structure */

struct	Fbuf

{

	long	nfree;

	long	free[1];		/* changes based on BUFSIZE */

};

/* DONT TOUCH, this is the disk structure */

struct	Superb

{

	Super1;

	Fbuf	fbuf;

};

struct	Device

{

	char	type;

	char	ctrl;

	char	unit;

	char	part;

};

/*

 * for load stats

 */

struct	Filter

{

	ulong	count;			/* count and old count kept separate */

	ulong	oldcount;		/* so interrput can read them */

	Float	filter[3];		/* filters for 1m 10m 100m */ 

};

struct	Filta

{

	Filter*	f;

	int	scale;

};

/*

 * array of qids that are locked

 */

struct	Tlock

{

	Device	dev;

	long	time;

	long	qpath;

	File*	file;

};

struct	File

{

	QLock;

	Qid	qid;

	Wpath*	wpath;

	Chan*	cp;		/* null means a free slot */

	Tlock*	tlock;		/* if file is locked */

	File*	next;		/* in cp->flist */

	File*	list;		/* in list of free files */

	Filsys*	fs;

	long	addr;

	long	slot;

	long	lastra;		/* read ahead address */

	short	fid;

	short	uid;

	char	open;

		#define	FREAD	1

		#define	FWRITE	2

		#define	FREMOV	4

		#define	FWSTAT	8

	long	doffset;	/* directory reading */

	ulong	dvers;

	long	dslot;

	/* for network authentication */

	AuthRpc	*rpc;

	short	cuid;

};

struct	Filsys

{

	char*	name;		/* name of filesys */

	Device	dev;		/* device that filesys is on */

	int	flags;

		#define	FREAM		(1<<1)	/* mkfs */

		#define	FRECOVER	(1<<2)	/* install last dump */

};

struct	Hiob

{

	Iobuf*	link;

	Lock;

};

struct	Iobuf

{

	QLock;

	Device	dev;

	Iobuf	*next;		/* for hash */

	Iobuf	*fore;		/* for lru */

	Iobuf	*back;		/* for lru */

	char	*iobuf;		/* only active while locked */

	char	*xiobuf;	/* "real" buffer pointer */

	long	addr;

	int	flags;

};

struct	P9call

{

	uchar	calln;

	uchar	rxflag;

	short	msize;

	void	(*func)(Chan*, int);

};

// struct	Tm

// {

// 	/* see ctime(3) */

// 	int	sec;

// 	int	min;

// 	int	hour;

// 	int	mday;

// 	int	mon;

// 	int	year;

// 	int	wday;

// 	int	yday;

// 	int	isdst;

// };

struct	Uid

{

	short	uid;		/* user id */

	short	lead;		/* leader of group */

	short	offset;		/* byte offset in uidspace */

};

struct	Wpath

{

	Wpath	*up;		/* pointer upwards in path */

	Wpath	*list;		/* link in free chain */

	long	addr;		/* directory entry addr of parent */

	long	slot;		/* directory entry slot of parent */

	short	refs;		/* number of files using this structure */

};

#define	MAXFDATA	8192

/*

 * error codes generated from the file server

 */

enum

{

	Ebadspc = 1,

	Efid,

	Efidinuse,

	Echar,

	Eopen,

	Ecount,

	Ealloc,

	Eqid,

	Eauth,

	Eauthmsg,

	Eaccess,

	Eentry,

	Emode,

	Edir1,

	Edir2,

	Ephase,

	Eexist,

	Edot,

	Eempty,

	Ebadu,

	Enotu,

	Enotg,

	Ename,

	Ewalk,

	Eronly,

	Efull,

	Eoffset,

	Elocked,

	Ebroken,

	Etoolong,

	Ersc,

	Eqidmode,

	Econvert,

	Enotm,

	Enotd,

	Enotl,

	Enotw,

	Esystem,

	MAXERR

};

/*

 * devnone block numbers

 */

enum

{

	Cwio1 	= 1,

	Cwio2,

	Cwxx1,

	Cwxx2,

	Cwxx3,

	Cwxx4,

	Cwdump1,

	Cwdump2,

	Cuidbuf,

};

/*

 * tags on block

 */

enum

{

	Tnone		= 0,

	Tsuper,			/* the super block */

	Tdir,			/* directory contents */

	Tind1,			/* points to blocks */

	Tind2,			/* points to Tind1 */

	Tfile,			/* file contents */

	Tfree,			/* in free list */

	Tbuck,			/* cache fs bucket */

	Tvirgo,			/* fake worm virgin bits */

	Tcache,			/* cw cache things */

	MAXTAG

};

/*

 * flags to getbuf

 */

enum

{

	Bread	= (1<<0),	/* read the block if miss */

	Bprobe	= (1<<1),	/* return null if miss */

	Bmod	= (1<<2),	/* set modified bit in buffer */

	Bimm	= (1<<3),	/* set immediate bit in buffer */

	Bres	= (1<<4),	/* reserved, never renammed */

};

/*

 * open modes passed into P9 open/create

 */

enum

{

	MREAD	= 0,

	MWRITE,

	MBOTH,

	MEXEC,

	MTRUNC	= (1<<4),	/* truncate on open */

	MCEXEC	= (1<<5),	/* close on exec (host) */

	MRCLOSE	= (1<<6),	/* remove on close */

};

/*

 * check flags

 */

enum

{

	Crdall	= (1<<0),	/* read all files */

	Ctag	= (1<<1),	/* rebuild tags */

	Cpfile	= (1<<2),	/* print files */

	Cpdir	= (1<<3),	/* print directories */

	Cfree	= (1<<4),	/* rebuild free list */

	Cream	= (1<<6),	/* clear all bad tags */

	Cbad	= (1<<7),	/* clear all bad blocks */

	Ctouch	= (1<<8),	/* touch old dir and indir */

	Cquiet	= (1<<9),	/* report just nasty things */

};

/*

 * buffer size variables

 */

extern int	RBUFSIZE;

extern int	BUFSIZE;

extern int	DIRPERBUF;

extern int	INDPERBUF;

extern int	INDPERBUF2;

extern int	FEPERBUF;