#include <u.h>#include <libc.h>#include <diskfs.h>#include <venti.h> extern void vtLibThread(void); typedef struct DiskVenti DiskVenti;struct DiskVenti{	TvCache *c;	Entry e;}; Disk*diskOpenVenti(TvCache *c, uchar score[VtScoreSize]){	vtLibThread(); 	fetch vtroot	fetch dir block	copy e} Block*diskVentiRead(Disk *dd, u32int len, u64int offset){	DiskVenti *d = (DiskVenti*)dd; 	make offset list	walk down blocks	return the one}