sys/h/filsys.h

/*      filsys.h        4.3     81/03/03        */

/*
 * 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 */
        daddr_t s_tfree;                /* total free blocks*/
        ino_t   s_tinode;               /* total free inodes */
        short   s_dinfo[2];             /* interleave stuff */
#define s_m     s_dinfo[0]
#define s_n     s_dinfo[1]
        char    s_fsmnt[12];            /* ordinary file mounted on */
        /* end not maintained */
        ino_t   s_lasti;                /* start place for circular search */
        ino_t   s_nbehind;              /* est # free inodes before s_lasti */
};

#ifdef KERNEL
struct  filsys *getfs();
#endif