servers/pfs/type.h

   1
   2 struct buf {
   3   /* Data portion of the buffer. */
   4   union fsdata_u *bp;
   5
   6   /* Header portion of the buffer. */
   7   struct buf *b_next;           /* used to link all free bufs in a chain */
   8   struct buf *b_prev;           /* used to link all free bufs the other way */
   9   struct buf *b_hash;           /* used to link bufs on hash chains */
  10   block_t b_blocknr;            /* block number of its (minor) device */
  11   dev_t b_dev;                  /* major | minor device where block resides */
  12   char b_dirt;                  /* CLEAN or DIRTY */
  13   char b_count;                 /* number of users of this buffer */
  14   int b_bytes;                  /* Number of bytes allocated in bp */
  15 };
  16