1/*
 2 *  fs/partitions/sysv68.c
 3 *
 4 *  Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
 5 */
 6
 7#include "check.h"
 8#include "sysv68.h"
 9
10/*
11 *	Volume ID structure: on first 256-bytes sector of disk
12 */
13
14struct volumeid {
15	u8	vid_unused[248];
16	u8	vid_mac[8];	/* ASCII string "MOTOROLA" */
17};
18
19/*
20 *	config block: second 256-bytes sector on disk
21 */
22
23struct dkconfig {
24	u8	ios_unused0[128];
25	__be32	ios_slcblk;	/* Slice table block number */
26	__be16	ios_slccnt;	/* Number of entries in slice table */
27	u8	ios_unused1[122];
28};
29
30/*
31 *	combined volumeid and dkconfig block
32 */
33
34struct dkblk0 {
35	struct volumeid dk_vid;
36	struct dkconfig dk_ios;
37};
38
39/*
40 *	Slice Table Structure
41 */
42
43struct slice {
44	__be32	nblocks;		/* slice size (in blocks) */
45	__be32	blkoff;			/* block offset of slice */
46};
47
48
49int sysv68_partition(struct parsed_partitions *state)
50{
51	int i, slices;
52	int slot = 1;
53	Sector sect;
54	unsigned char *data;
55	struct dkblk0 *b;
56	struct slice *slice;
57	char tmp[64];
58
59	data = read_part_sector(state, 0, &sect);
60	if (!data)
61		return -1;
62
63	b = (struct dkblk0 *)data;
64	if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
65		put_dev_sector(sect);
66		return 0;
67	}
68	slices = be16_to_cpu(b->dk_ios.ios_slccnt);
69	i = be32_to_cpu(b->dk_ios.ios_slcblk);
70	put_dev_sector(sect);
71
72	data = read_part_sector(state, i, &sect);
73	if (!data)
74		return -1;
75
76	slices -= 1; /* last slice is the whole disk */
77	snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
78	strlcat(state->pp_buf, tmp, PAGE_SIZE);
79	slice = (struct slice *)data;
80	for (i = 0; i < slices; i++, slice++) {
81		if (slot == state->limit)
82			break;
83		if (be32_to_cpu(slice->nblocks)) {
84			put_partition(state, slot,
85				be32_to_cpu(slice->blkoff),
86				be32_to_cpu(slice->nblocks));
87			snprintf(tmp, sizeof(tmp), "(s%u)", i);
88			strlcat(state->pp_buf, tmp, PAGE_SIZE);
89		}
90		slot++;
91	}
92	strlcat(state->pp_buf, "\n", PAGE_SIZE);
93	put_dev_sector(sect);
94	return 1;
95}

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 *  fs/partitions/sysv68.c
 4 *
 5 *  Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
 6 */
 7
 8#include "check.h"
 9#include "sysv68.h"
10
11/*
12 *	Volume ID structure: on first 256-bytes sector of disk
13 */
14
15struct volumeid {
16	u8	vid_unused[248];
17	u8	vid_mac[8];	/* ASCII string "MOTOROLA" */
18};
19
20/*
21 *	config block: second 256-bytes sector on disk
22 */
23
24struct dkconfig {
25	u8	ios_unused0[128];
26	__be32	ios_slcblk;	/* Slice table block number */
27	__be16	ios_slccnt;	/* Number of entries in slice table */
28	u8	ios_unused1[122];
29};
30
31/*
32 *	combined volumeid and dkconfig block
33 */
34
35struct dkblk0 {
36	struct volumeid dk_vid;
37	struct dkconfig dk_ios;
38};
39
40/*
41 *	Slice Table Structure
42 */
43
44struct slice {
45	__be32	nblocks;		/* slice size (in blocks) */
46	__be32	blkoff;			/* block offset of slice */
47};
48
49
50int sysv68_partition(struct parsed_partitions *state)
51{
52	int i, slices;
53	int slot = 1;
54	Sector sect;
55	unsigned char *data;
56	struct dkblk0 *b;
57	struct slice *slice;
58	char tmp[64];
59
60	data = read_part_sector(state, 0, &sect);
61	if (!data)
62		return -1;
63
64	b = (struct dkblk0 *)data;
65	if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
66		put_dev_sector(sect);
67		return 0;
68	}
69	slices = be16_to_cpu(b->dk_ios.ios_slccnt);
70	i = be32_to_cpu(b->dk_ios.ios_slcblk);
71	put_dev_sector(sect);
72
73	data = read_part_sector(state, i, &sect);
74	if (!data)
75		return -1;
76
77	slices -= 1; /* last slice is the whole disk */
78	snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
79	strlcat(state->pp_buf, tmp, PAGE_SIZE);
80	slice = (struct slice *)data;
81	for (i = 0; i < slices; i++, slice++) {
82		if (slot == state->limit)
83			break;
84		if (be32_to_cpu(slice->nblocks)) {
85			put_partition(state, slot,
86				be32_to_cpu(slice->blkoff),
87				be32_to_cpu(slice->nblocks));
88			snprintf(tmp, sizeof(tmp), "(s%u)", i);
89			strlcat(state->pp_buf, tmp, PAGE_SIZE);
90		}
91		slot++;
92	}
93	strlcat(state->pp_buf, "\n", PAGE_SIZE);
94	put_dev_sector(sect);
95	return 1;
96}