1/*
2 * volume_id - reads filesystem label and uuid
3 *
4 * Copyright (C) 2004 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
29#define VXFS_SUPER_MAGIC	0xa501FCF5
30
31struct vxfs_super {
32	uint32_t		vs_magic;
33	int32_t			vs_version;
34} PACKED;
35
36int volume_id_probe_vxfs(struct volume_id *id, uint64_t off, uint64_t size)
37{
38	struct vxfs_super *vxs;
39
40	info("probing at offset 0x%llx", (unsigned long long) off);
41
42	vxs = (struct vxfs_super *) volume_id_get_buffer(id, off + 0x200, 0x200);
43	if (vxs == NULL)
44		return -1;
45
46	if (vxs->vs_magic == cpu_to_le32(VXFS_SUPER_MAGIC)) {
47		snprintf(id->type_version, sizeof(id->type_version)-1, "%u", (unsigned int) vxs->vs_version);
48		volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
49		id->type = "vxfs";
50		return 0;
51	}
52
53	return -1;
54}
55