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/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 of the License.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "volume_id.h"
#include "logging.h"
#include "util.h"
#define VXFS_SUPER_MAGIC 0xa501FCF5
struct vxfs_super {
uint32_t vs_magic;
int32_t vs_version;
} __attribute__((__packed__));
int volume_id_probe_vxfs(struct volume_id *id, uint64_t off)
{
struct vxfs_super *vxs;
dbg("probing at offset 0x%llx", (unsigned long long) off);
vxs = (struct vxfs_super *) volume_id_get_buffer(id, off + 0x200, 0x200);
if (vxs == NULL)
return -1;
if (vxs->vs_magic == cpu_to_le32(VXFS_SUPER_MAGIC)) {
snprintf(id->type_version, sizeof(id->type_version)-1, "%u", (unsigned int) vxs->vs_version);
volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
id->type = "vxfs";
return 0;
}
return -1;
}
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