vmdk.h

   1 /*
   2    Copyright (C) Matthew Chapman 2003
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18
  19 #define SECTOR_BITS     9
  20 #define SECTOR_SIZE     (1 << SECTOR_BITS)
  21 #define SECTOR_MASK     (SECTOR_SIZE - 1)
  22
  23 #define L1_BITS         (SECTOR_BITS - 3)
  24 #define L1_SIZE         (1 << L1_BITS)
  25 #define L1_MASK         (L1_SIZE - 1)
  26
  27 #define L2_BITS         SECTOR_BITS
  28 #define L2_SIZE         (1 << L2_BITS)
  29 #define L2_MASK         (L2_SIZE - 1)
  30
  31 #define MIN(x,y)        (((x) < (y)) ? (x) : (y))
  32
  33 struct cowdisk_header
  34 {
  35     char magic[4]; /* COWD */
  36     uint32_t version;
  37     uint32_t flags;
  38     uint32_t disk_sectors;
  39     uint32_t granularity;
  40     uint32_t l1dir_sector;
  41     uint32_t l1dir_size;
  42     uint32_t file_sectors;
  43     uint32_t cylinders;
  44     uint32_t heads;
  45     uint32_t sectors_per_track;
  46 };
  47
  48 struct cowdisk_header2
  49 {
  50    uint32_t parent_ts;
  51    uint32_t timestamp;
  52 };