1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 *  fs/partitions/karma.c
 4 *  Rio Karma partition info.
 5 *
 6 *  Copyright (C) 2006 Bob Copeland (me@bobcopeland.com)
 7 *  based on osf.c
 8 */
 9
10#include "check.h"
11#include <linux/compiler.h>
12
13#define KARMA_LABEL_MAGIC		0xAB56
14
15int karma_partition(struct parsed_partitions *state)
16{
17	int i;
18	int slot = 1;
19	Sector sect;
20	unsigned char *data;
21	struct disklabel {
22		u8 d_reserved[270];
23		struct d_partition {
24			__le32 p_res;
25			u8 p_fstype;
26			u8 p_res2[3];
27			__le32 p_offset;
28			__le32 p_size;
29		} d_partitions[2];
30		u8 d_blank[208];
31		__le16 d_magic;
32	} __packed *label;
33	struct d_partition *p;
34
35	data = read_part_sector(state, 0, &sect);
36	if (!data)
37		return -1;
38
39	label = (struct disklabel *)data;
40	if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
41		put_dev_sector(sect);
42		return 0;
43	}
44
45	p = label->d_partitions;
46	for (i = 0 ; i < 2; i++, p++) {
47		if (slot == state->limit)
48			break;
49
50		if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
51			put_partition(state, slot, le32_to_cpu(p->p_offset),
52				le32_to_cpu(p->p_size));
53		}
54		slot++;
55	}
56	strlcat(state->pp_buf, "\n", PAGE_SIZE);
57	put_dev_sector(sect);
58	return 1;
59}
60