1/*
2 * volume_id - reads filesystem label and uuid
3 *
4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
5 *
6 *	This program is free software; you can redistribute it and/or modify it
7 *	under the terms of the GNU General Public License as published by the
8 *	Free Software Foundation version 2 of the License.
9 */
10
11#ifndef _GNU_SOURCE
12#define _GNU_SOURCE 1
13#endif
14
15#ifdef HAVE_CONFIG_H
16#  include <config.h>
17#endif
18
19#include <stdio.h>
20#include <stdlib.h>
21#include <unistd.h>
22#include <string.h>
23#include <errno.h>
24#include <ctype.h>
25
26#include "libvolume_id.h"
27#include "util.h"
28
29struct silicon_meta {
30	uint8_t		unknown0[0x2E];
31	uint8_t		ascii_version[0x36 - 0x2E];
32	uint8_t		diskname[0x56 - 0x36];
33	uint8_t		unknown1[0x60 - 0x56];
34	uint32_t	magic;
35	uint32_t	unknown1a[0x6C - 0x64];
36	uint32_t	array_sectors_low;
37	uint32_t	array_sectors_high;
38	uint8_t		unknown2[0x78 - 0x74];
39	uint32_t	thisdisk_sectors;
40	uint8_t		unknown3[0x100 - 0x7C];
41	uint8_t		unknown4[0x104 - 0x100];
42	uint16_t	product_id;
43	uint16_t	vendor_id;
44	uint16_t	minor_ver;
45	uint16_t	major_ver;
46} PACKED;
47
48#define SILICON_MAGIC		0x2F000000
49
50int volume_id_probe_silicon_medley_raid(struct volume_id *id, uint64_t off, uint64_t size)
51{
52	const uint8_t *buf;
53	uint64_t meta_off;
54	struct silicon_meta *sil;
55
56	info("probing at offset 0x%llx, size 0x%llx",
57	    (unsigned long long) off, (unsigned long long) size);
58
59	if (size < 0x10000)
60		return -1;
61
62	meta_off = ((size / 0x200)-1) * 0x200;
63	buf = volume_id_get_buffer(id, off + meta_off, 0x200);
64	if (buf == NULL)
65		return -1;
66
67	sil = (struct silicon_meta *) buf;
68	if (le32_to_cpu(sil->magic) != SILICON_MAGIC)
69		return -1;
70
71	volume_id_set_usage(id, VOLUME_ID_RAID);
72	snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u",
73		 le16_to_cpu(sil->major_ver), le16_to_cpu(sil->minor_ver));
74	id->type = "silicon_medley_raid_member";
75
76	return 0;
77}
78