/* * Definition of the unix super block. * The root super block is allocated and * read in iinit/alloc.c. Subsequently * a super block is allocated and read * with each mount (smount/sys3.c) and * released with unmount (sumount/sys3.c). * A disk block is ripped off for storage. * See alloc.c for general alloc/free * routines for free list and I list. */struct	filsys{	int	s_isize;	/* size in blocks of I list */	int	s_fsize;	/* size in blocks of entire volume */	int	s_nfree;	/* number of in core free blocks (0-100) */	int	s_free[100];	/* in core free blocks */	int	s_ninode;	/* number of in core I nodes (0-100) */	int	s_inode[100];	/* in core free I nodes */	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 */	int	s_time[2];	/* current date of last update */	int	pad[50];};