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 "karma.h"
12 #include <linux/compiler.h>
13 
karma_partition(struct parsed_partitions * state)14 int karma_partition(struct parsed_partitions *state)
15 {
16 	int i;
17 	int slot = 1;
18 	Sector sect;
19 	unsigned char *data;
20 	struct disklabel {
21 		u8 d_reserved[270];
22 		struct d_partition {
23 			__le32 p_res;
24 			u8 p_fstype;
25 			u8 p_res2[3];
26 			__le32 p_offset;
27 			__le32 p_size;
28 		} d_partitions[2];
29 		u8 d_blank[208];
30 		__le16 d_magic;
31 	} __packed *label;
32 	struct d_partition *p;
33 
34 	data = read_part_sector(state, 0, &sect);
35 	if (!data)
36 		return -1;
37 
38 	label = (struct disklabel *)data;
39 	if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
40 		put_dev_sector(sect);
41 		return 0;
42 	}
43 
44 	p = label->d_partitions;
45 	for (i = 0 ; i < 2; i++, p++) {
46 		if (slot == state->limit)
47 			break;
48 
49 		if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
50 			put_partition(state, slot, le32_to_cpu(p->p_offset),
51 				le32_to_cpu(p->p_size));
52 		}
53 		slot++;
54 	}
55 	strlcat(state->pp_buf, "\n", PAGE_SIZE);
56 	put_dev_sector(sect);
57 	return 1;
58 }
59 
60