lib/uuid/uuid.h

   1 /*
   2  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   3  * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
   4  *
   5  * This file is part of LVM2.
   6  *
   7  * This copyrighted material is made available to anyone wishing to use,
   8  * modify, copy, or redistribute it subject to the terms and conditions
   9  * of the GNU Lesser General Public License v.2.1.
  10  *
  11  * You should have received a copy of the GNU Lesser General Public License
  12  * along with this program; if not, write to the Free Software Foundation,
  13  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  14  */
  15
  16 #ifndef _LVM_UUID_H
  17 #define _LVM_UUID_H
  18
  19 #define ID_LEN 32
  20 #define ID_LEN_S "32"
  21
  22 struct id {
  23         int8_t uuid[ID_LEN];
  24 };
  25
  26 /*
  27  * Unique logical volume identifier
  28  * With format1 this is VG uuid + LV uuid + '\0' + padding
  29  */
  30 union lvid {
  31         struct id id[2];
  32         char s[2 * sizeof(struct id) + 1 + 7];
  33 };
  34
  35 int lvid_from_lvnum(union lvid *lvid, struct id *vgid, uint32_t lv_num);
  36 int lvnum_from_lvid(union lvid *lvid);
  37 int lvid_in_restricted_range(union lvid *lvid);
  38
  39 void uuid_from_num(char *uuid, uint32_t num);
  40
  41 int lvid_create(union lvid *lvid, struct id *vgid);
  42 int id_create(struct id *id);
  43 int id_valid(struct id *id);
  44 int id_equal(const struct id *lhs, const struct id *rhs);
  45
  46 /*
  47  * Fills 'buffer' with a more human readable form
  48  * of the uuid.
  49  */
  50 int id_write_format(const struct id *id, char *buffer, size_t size);
  51
  52 /*
  53  * Reads a formatted uuid.
  54  */
  55 int id_read_format(struct id *id, const char *buffer);
  56
  57 char *id_format_and_copy(struct dm_pool *mem, const struct id *id);
  58
  59 #endif