UNIX 7th Ed. - /usr/sys/h/filsys.h

   1: /*
   2:  * Structure of the super-block
   3:  */
   4: struct  filsys {
   5:     unsigned short s_isize; /* size in blocks of i-list */
   6:     daddr_t s_fsize;    /* size in blocks of entire volume */
   7:     short   s_nfree;    /* number of addresses in s_free */
   8:     daddr_t s_free[NICFREE];/* free block list */
   9:     short   s_ninode;   /* number of i-nodes in s_inode */
  10:     ino_t   s_inode[NICINOD];/* free i-node list */
  11:     char    s_flock;    /* lock during free list manipulation */
  12:     char    s_ilock;    /* lock during i-list manipulation */
  13:     char    s_fmod;     /* super block modified flag */
  14:     char    s_ronly;    /* mounted read-only flag */
  15:     time_t  s_time;     /* last super block update */
  16:     /* remainder not maintained by this version of the system */
  17:     daddr_t s_tfree;    /* total free blocks*/
  18:     ino_t   s_tinode;   /* total free inodes */
  19:     short   s_m;        /* interleave factor */
  20:     short   s_n;        /* " " */
  21:     char    s_fname[6]; /* file system name */
  22:     char    s_fpack[6]; /* file system pack name */
  23: };

Defined struct's

Usage of this include