minix/fs/mfs/buf.h

   1 #ifndef __MFS_BUF_H__
   2 #define __MFS_BUF_H__
   3
   4 #include "clean.h"
   5
   6 union ixfer_fsdata_u {
   7     char b__data[1];                    /* ordinary user data */
   8     struct direct b__dir[1];            /* directory block */
   9     zone_t  b__v2_ind[1];               /* V2 indirect block */
  10     d2_inode b__v2_ino[1];              /* V2 inode block */
  11     bitchunk_t b__bitmap[1];            /* bit map block */
  12 };
  13
  14 /* These defs make it possible to use to bp->b_data instead of bp->b.b__data */
  15 #define b_data(b)   ((union ixfer_fsdata_u *) b->data)->b__data
  16 #define b_dir(b)    ((union ixfer_fsdata_u *) b->data)->b__dir
  17 #define b_v2_ind(b) ((union ixfer_fsdata_u *) b->data)->b__v2_ind
  18 #define b_v2_ino(b) ((union ixfer_fsdata_u *) b->data)->b__v2_ino
  19 #define b_bitmap(b) ((union ixfer_fsdata_u *) b->data)->b__bitmap
  20
  21 #endif