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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/*
* fs/partitions/sysv68.c
*
* Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
*/
#include "check.h"
#include "sysv68.h"
/*
* Volume ID structure: on first 256-bytes sector of disk
*/
struct volumeid {
u8 vid_unused[248];
u8 vid_mac[8]; /* ASCII string "MOTOROLA" */
};
/*
* config block: second 256-bytes sector on disk
*/
struct dkconfig {
u8 ios_unused0[128];
__be32 ios_slcblk; /* Slice table block number */
__be16 ios_slccnt; /* Number of entries in slice table */
u8 ios_unused1[122];
};
/*
* combined volumeid and dkconfig block
*/
struct dkblk0 {
struct volumeid dk_vid;
struct dkconfig dk_ios;
};
/*
* Slice Table Structure
*/
struct slice {
__be32 nblocks; /* slice size (in blocks) */
__be32 blkoff; /* block offset of slice */
};
int sysv68_partition(struct parsed_partitions *state, struct block_device *bdev)
{
int i, slices;
int slot = 1;
Sector sect;
unsigned char *data;
struct dkblk0 *b;
struct slice *slice;
data = read_dev_sector(bdev, 0, §);
if (!data)
return -1;
b = (struct dkblk0 *)data;
if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
put_dev_sector(sect);
return 0;
}
slices = be16_to_cpu(b->dk_ios.ios_slccnt);
i = be32_to_cpu(b->dk_ios.ios_slcblk);
put_dev_sector(sect);
data = read_dev_sector(bdev, i, §);
if (!data)
return -1;
slices -= 1; /* last slice is the whole disk */
printk("sysV68: %s(s%u)", state->name, slices);
slice = (struct slice *)data;
for (i = 0; i < slices; i++, slice++) {
if (slot == state->limit)
break;
if (be32_to_cpu(slice->nblocks)) {
put_partition(state, slot,
be32_to_cpu(slice->blkoff),
be32_to_cpu(slice->nblocks));
printk("(s%u)", i);
}
slot++;
}
printk("\n");
put_dev_sector(sect);
return 1;
}
|
