include/linux/uuid.h

   1 /*
   2  * UUID/GUID definition
   3  *
   4  * Copyright (C) 2010, Intel Corp.
   5  *      Huang Ying <ying.huang@intel.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License version
   9  * 2 as published by the Free Software Foundation;
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifndef _LINUX_UUID_H_
  22 #define _LINUX_UUID_H_
  23
  24 #include <linux/types.h>
  25 #include <linux/string.h>
  26
  27 typedef struct {
  28         __u8 b[16];
  29 } uuid_le;
  30
  31 typedef struct {
  32         __u8 b[16];
  33 } uuid_be;
  34
  35 #define UUID_LE(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)                \
  36 ((uuid_le)                                                              \
  37 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  38    (b) & 0xff, ((b) >> 8) & 0xff,                                       \
  39    (c) & 0xff, ((c) >> 8) & 0xff,                                       \
  40    (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  41
  42 #define UUID_BE(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)                \
  43 ((uuid_be)                                                              \
  44 {{ ((a) >> 24) & 0xff, ((a) >> 16) & 0xff, ((a) >> 8) & 0xff, (a) & 0xff, \
  45    ((b) >> 8) & 0xff, (b) & 0xff,                                       \
  46    ((c) >> 8) & 0xff, (c) & 0xff,                                       \
  47    (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  48
  49 #define NULL_UUID_LE                                                    \
  50         UUID_LE(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00,     \
  51                 0x00, 0x00, 0x00, 0x00)
  52
  53 #define NULL_UUID_BE                                                    \
  54         UUID_BE(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00,     \
  55                 0x00, 0x00, 0x00, 0x00)
  56
  57 #ifdef __KERNEL__
  58
  59 static inline int uuid_le_cmp(const uuid_le u1, const uuid_le u2)
  60 {
  61         return memcmp(&u1, &u2, sizeof(uuid_le));
  62 }
  63
  64 static inline int uuid_be_cmp(const uuid_be u1, const uuid_be u2)
  65 {
  66         return memcmp(&u1, &u2, sizeof(uuid_be));
  67 }
  68
  69 extern void uuid_le_gen(uuid_le *u);
  70 extern void uuid_be_gen(uuid_be *u);
  71
  72 #endif /* __KERNEL__ */
  73
  74 #endif