root/buf.h

/*   */

INCLUDED FROM

   1 struct buf {
   2   int flags;
   3   uint dev;
   4   uint blockno;
   5   struct sleeplock lock;
   6   uint refcnt;
   7   struct buf *prev; // LRU cache list
   8   struct buf *next;
   9   struct buf *qnext; // disk queue
  10   uchar data[BSIZE];
  11 };
  12 #define B_VALID 0x2  // buffer has been read from disk
  13 #define B_DIRTY 0x4  // buffer needs to be written to disk
  14 

/*   */