/* * Structure of the super-block */struct	filsys {	unsigned short s_isize;	/* size in blocks of i-list */	daddr_t	s_fsize;   	/* size in blocks of entire volume */	short  	s_nfree;   	/* number of addresses in s_free */	daddr_t	s_free[NICFREE];/* free block list */	short  	s_ninode;  	/* number of i-nodes in s_inode */	ino_t  	s_inode[NICINOD];/* free i-node list */	char   	s_flock;   	/* lock during free list manipulation */	char   	s_ilock;   	/* lock during i-list manipulation */	char   	s_fmod;    	/* super block modified flag */	char   	s_ronly;   	/* mounted read-only flag */	time_t 	s_time;    	/* last super block update */	/* remainder not maintained by this version of the system */	daddr_t	s_tfree;   	/* total free blocks*/	ino_t  	s_tinode;  	/* total free inodes */	short  	s_m;       	/* interleave factor */	short  	s_n;       	/* " " */	char   	s_fname[6];	/* file system name */	char   	s_fpack[6];	/* file system pack name */};