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// SPDX-License-Identifier: GPL-2.0
/*
* 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)
{
int i, slices;
int slot = 1;
Sector sect;
unsigned char *data;
struct dkblk0 *b;
struct slice *slice;
char tmp[64];
data = read_part_sector(state, 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_part_sector(state, i, §);
if (!data)
return -1;
slices -= 1; /* last slice is the whole disk */
snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
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));
snprintf(tmp, sizeof(tmp), "(s%u)", i);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
}
slot++;
}
strlcat(state->pp_buf, "\n", PAGE_SIZE);
put_dev_sector(sect);
return 1;
}
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