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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
* This file is part of LVM2.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#ifndef _LVM_UUID_H
#define _LVM_UUID_H
#define ID_LEN 32
#include <sys/types.h>
struct dm_pool;
struct id {
int8_t uuid[ID_LEN];
* Unique logical volume identifier
* With format1 this is VG uuid + LV uuid + '\0' + padding
union lvid {
struct id id[2];
char s[2 * sizeof(struct id) + 1 + 7];
int lvid_from_lvnum(union lvid *lvid, struct id *vgid, uint32_t lv_num);
int lvnum_from_lvid(union lvid *lvid);
int lvid_in_restricted_range(union lvid *lvid);
void uuid_from_num(char *uuid, uint32_t num);
int lvid_create(union lvid *lvid, struct id *vgid);
int id_create(struct id *id);
int id_valid(struct id *id);
int id_equal(const struct id *lhs, const struct id *rhs);
* Fills 'buffer' with a more human readable form
* of the uuid.
int id_write_format(const struct id *id, char *buffer, size_t size);
* Reads a formatted uuid.
int id_read_format(struct id *id, const char *buffer);
* Tries to read a formatted uuid without logging error for invalid ID
int id_read_format_try(struct id *id, const char *buffer);
char *id_format_and_copy(struct dm_pool *mem, const struct id *id);