93 lines
1.8 KiB
C
93 lines
1.8 KiB
C
/*
|
|
* 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;
|
|
}
|