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filsys.h
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C/C++ Source or Header
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1975-05-14
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949b
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27 lines
/*
* 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];
};