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 nvidia_meta {
30	uint8_t		vendor[8];
31	uint32_t	size;
32	uint32_t	chksum;
33	uint16_t	version;
34} PACKED;
35
36#define NVIDIA_SIGNATURE		"NVIDIA"
37
38int volume_id_probe_nvidia_raid(struct volume_id *id, uint64_t off, uint64_t size)
39{
40	const uint8_t *buf;
41	uint64_t meta_off;
42	struct nvidia_meta *nv;
43
44	info("probing at offset 0x%llx, size 0x%llx",
45	    (unsigned long long) off, (unsigned long long) size);
46
47	if (size < 0x10000)
48		return -1;
49
50	meta_off = ((size / 0x200)-2) * 0x200;
51	buf = volume_id_get_buffer(id, off + meta_off, 0x200);
52	if (buf == NULL)
53		return -1;
54
55	nv = (struct nvidia_meta *) buf;
56	if (memcmp(nv->vendor, NVIDIA_SIGNATURE, sizeof(NVIDIA_SIGNATURE)-1) != 0)
57		return -1;
58
59	volume_id_set_usage(id, VOLUME_ID_RAID);
60	snprintf(id->type_version, sizeof(id->type_version)-1, "%u", le16_to_cpu(nv->version));
61	id->type = "nvidia_raid_member";
62
63	return 0;
64}
65