typedef struct Dentry {
	vlong	offset;	/* offset of the dentry */

	/* on-disk fields */
	int	mode;	/* in 9p2000 format */
	u16int	uid;
	int	length;	/* length in bytes of the file */
	u8int	gid;
	vlong	index;	/* offset of the file's block index */
	vlong	data;	/* offset of the compressed block */
	int	namelen;	/* length in bytes of name, excluding padding */
	char	name[256];	/* null terminated */
} Dentry;

typedef struct Super {
	u32int	size;	/* size in bytes of the file system, including the header */
	u32int	flags;
	u32int	crc;
	u32int	edition;
	u32int	nblocks;
	u32int	nfiles;
	Dentry	root;
} Super;

enum {Blocksz = 4096};

/* pack.c */
u32int get32(uchar *);
long Bpread(Biobuf *, void *buf, long n, vlong o);
int readdentry(Biobuf *disk, Dentry *, vlong offset);
void printdentry(char *pfx, Dentry *);
void readsuper(Biobuf *disk, Super *super);