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
15 int 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, §);
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
61
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