blob: a847f8b155801c2859ac5f264776801f972bd7c5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*
Copyright (C) Matthew Chapman 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define SECTOR_BITS 9
#define SECTOR_SIZE (1 << SECTOR_BITS)
#define SECTOR_MASK (SECTOR_SIZE - 1)
#define L1_BITS (SECTOR_BITS - 3)
#define L1_SIZE (1 << L1_BITS)
#define L1_MASK (L1_SIZE - 1)
#define L2_BITS SECTOR_BITS
#define L2_SIZE (1 << L2_BITS)
#define L2_MASK (L2_SIZE - 1)
#define MIN(x,y) (((x) < (y)) ? (x) : (y))
struct cowdisk_header
{
char magic[4]; /* COWD */
uint32_t version;
uint32_t flags;
uint32_t disk_sectors;
uint32_t granularity;
uint32_t l1dir_sector;
uint32_t l1dir_size;
uint32_t file_sectors;
uint32_t cylinders;
uint32_t heads;
uint32_t sectors_per_track;
};
struct cowdisk_header2
{
uint32_t parent_ts;
uint32_t timestamp;
};
|
