external/gpl2/lvm2/dist/include/uuid.h

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