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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, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "libvolume_id.h"
#include "libvolume_id-private.h"
#define VXFS_SUPER_MAGIC 0xa501FCF5
struct vxfs_super {
uint32_t vs_magic;
int32_t vs_version;
} PACKED;
int volume_id_probe_vxfs(struct volume_id *id, uint64_t off, uint64_t size)
{
struct vxfs_super *vxs;
info("probing at offset 0x%llx\n", (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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