/* * 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 { char *s_isize; /* size in blocks of I list */ char *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 */ long s_time; /* current date of last update */ int pad[40]; int s_tfree; /* Total free, for subsystem examination */ int s_tinode; /* Free inodes, for subsystem examination */ char s_fname[6]; /* File system name */ char s_fpack[6]; /* File system pack name */ };