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 
karma_partition(struct parsed_partitions * state)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, &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 
61