5550 /* 5551 * Definition of the unix super block. 5552 * The root super block is allocated and 5553 * read in iinit/alloc.c. Subsequently 5554 * a super block is allocated and read 5555 * with each mount (smount/sys3.c) and 5556 * released with unmount (sumount/sys3.c). 5557 * A disk block is ripped off for storage. 5558 * See alloc.c for general alloc/free 5559 * routines for free list and I list. 5560 */ 5561 struct filsys 5562 { 5563 int s_isize; /* size in blocks of I list */ 5564 int s_fsize; /* size in blocks of entire volume */ 5565 int s_nfree; /* number of in core free blocks (0-100) */ 5566 5567 int s_free[100]; /* in core free blocks */ 5568 int s_ninode; /* number of in core I nodes (0-100) */ 5569 int s_inode[100]; /* in core free I nodes */ 5570 char s_flock; /* lock during free list manipulation */ 5571 char s_ilock; /* lock during I list manipulation */ 5572 char s_fmod; /* super block modified flag */ 5573 char s_ronly; /* mounted read-only flag */ 5574 int s_time[2]; /* current date of last update */ 5575 int pad[50]; 5576 }; 5577 /* ------------------------ */ 5578 5579 5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599