#include <u.h>#include <libc.h>#include <auth.h>#include <fcall.h>#include <thread.h> #include "errors.h" typedef struct Array Array;typedef struct Disk Disk;typedef struct Entry Entry;typedef struct Extent Extent;typedef struct Fid Fid;typedef struct LogEntry LogEntry;typedef struct LogFile LogFile;typedef struct Nubfs Nubfs;typedef struct String String;typedef struct User User;typedef struct Walkqid Walkqid; #pragma incomplete Disk#pragma incomplete LogFile typedef u64int	DiskOffset;typedef u32int	FileOffset; enum{	Nextent=	24,}; struct Array {	int	len;}; struct String {	Ref;	uint	hash;	uint	n;	String*	next;	char	s[];}; struct Nubfs {	Fid*	fidmap[127];	String*	strings[127];	Entry*	pathmap[127]; 	Entry*	root; 	int	fd;	int	logfd;}; struct Extent {	DiskOffset	base;	/* offset in partition, in bytes */	FileOffset	 length;		/* extent length in bytes */}; struct Entry {	Ref;	Entry*	pnext;	/* path list */	Entry*	dnext;	/* directory list */ 	Qid	qid;	Entry*	parent;	char*	name;	String*	uid;	String*	gid;	String*	muid;	u32int	atime;	u32int	mtime;	u32int	mode;	union{		struct{			Entry*	files;		};	/* Dir */		struct{			u32int	cvers;	/* version of last create or trunc */			FileOffset	length;			usize	(*io)(Fid*, void*, usize, u64int, int);			int	nd;			Extent	data[Nextent];		};	/* File */	};}; struct Fid {	u32int	fid;	int	open;	Entry*	entry;	String*	user; 	Fid*	next;}; enum{	/* block tags */	Tnone=	0xAC,	Tboot=	0xDC,	Tlog=	0x18,	/* sweep set as low order nibble */	Tlog0=	Tlog,	Tlog1,	Tlog2,	Tlog3, 	NewExtent=	0x80,		/* new extent was allocated to Log Write request */}; struct Walkqid{	Fid*	clone;	int	nqid;	Qid	qid[];}; struct User{	String*	uid;	String*	name;	String*	leader;	uint	n;	String*	mem[];}; /* * log entries */enum{	Create=	'c',	Trunc=	't',	Remove=	'r',	Write=	'w',	Wstat=	'W',	Sync=	'S',	Mark=	'z',	/* log was closed at this point (unused) */}; struct LogEntry{	u8int op;	u32int path;	union{		struct{			u32int	newpath;			char*	name;			u32int	perm;			char*	uid;			char*	gid;			u32int	mtime;			u32int	cvers;			/* TO DO: qid.vers, atime, muid, length? */		} create;		struct{			u32int	mtime;			u32int	cvers;			char*	muid;		} trunc;		struct{			u32int	mtime;	/* of parent directory */			char*	muid;		} remove;		struct{			u32int	mtime;			char*	muid;			FileOffset	offset;			FileOffset	count;			u32int	vers;			u32int	cvers;			u32int	eoff;			Extent	ext;			uchar	exind;		} write;		struct{	/* Wstat */			u32int	perm;			char*	name;			char*	uid;			char*	gid;			char*	muid;			u32int	mtime;			u32int	atime;			/* TO DO: length */		} wstat;		/* Sync (no parameters) */		/* Mark (no parameters) */	};	u64int seq;}; typedef struct Context Context;struct Context {	char	errbuf[ERRMAX+1];	int	nerror;	jmp_buf	errors[8];}; Context staticctx;uchar debug[256];int	exiting; #define	waserror()	(staticctx.nerror++, setjmp(staticctx.errors[staticctx.nerror-1]))#define	poperror()	staticctx.nerror-- #define	NOW	time(nil)#define	DBG(x)	if(debug[(x)]) #pragma	varargck	type	"L"	LogEntry*#pragma	varargck	type "E"	Entry*