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1 | /* |
2 | * Unified UUID/GUID definition |
3 | * |
4 | * Copyright (C) 2009, 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 | #include <linux/kernel.h> |
22 | #include <linux/export.h> |
23 | #include <linux/uuid.h> |
24 | #include <linux/random.h> |
25 | |
26 | static void __uuid_gen_common(__u8 b[16]) |
27 | { |
28 | prandom_bytes(b, 16); |
29 | /* reversion 0b10 */ |
30 | b[8] = (b[8] & 0x3F) | 0x80; |
31 | } |
32 | |
33 | void uuid_le_gen(uuid_le *lu) |
34 | { |
35 | __uuid_gen_common(lu->b); |
36 | /* version 4 : random generation */ |
37 | lu->b[7] = (lu->b[7] & 0x0F) | 0x40; |
38 | } |
39 | EXPORT_SYMBOL_GPL(uuid_le_gen); |
40 | |
41 | void uuid_be_gen(uuid_be *bu) |
42 | { |
43 | __uuid_gen_common(bu->b); |
44 | /* version 4 : random generation */ |
45 | bu->b[6] = (bu->b[6] & 0x0F) | 0x40; |
46 | } |
47 | EXPORT_SYMBOL_GPL(uuid_be_gen); |
48 |
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od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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v3.9