Linux kernel mirror (for testing)
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1/*
2 * UUID/GUID definition
3 *
4 * Copyright (C) 2010, 2016 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#ifndef _LINUX_UUID_H_
17#define _LINUX_UUID_H_
18
19#include <uapi/linux/uuid.h>
20#include <linux/string.h>
21
22#define UUID_SIZE 16
23
24typedef struct {
25 __u8 b[UUID_SIZE];
26} uuid_t;
27
28#define UUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
29((uuid_t) \
30{{ ((a) >> 24) & 0xff, ((a) >> 16) & 0xff, ((a) >> 8) & 0xff, (a) & 0xff, \
31 ((b) >> 8) & 0xff, (b) & 0xff, \
32 ((c) >> 8) & 0xff, (c) & 0xff, \
33 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
34
35/*
36 * The length of a UUID string ("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")
37 * not including trailing NUL.
38 */
39#define UUID_STRING_LEN 36
40
41extern const guid_t guid_null;
42extern const uuid_t uuid_null;
43
44static inline bool guid_equal(const guid_t *u1, const guid_t *u2)
45{
46 return memcmp(u1, u2, sizeof(guid_t)) == 0;
47}
48
49static inline void guid_copy(guid_t *dst, const guid_t *src)
50{
51 memcpy(dst, src, sizeof(guid_t));
52}
53
54static inline bool guid_is_null(const guid_t *guid)
55{
56 return guid_equal(guid, &guid_null);
57}
58
59static inline bool uuid_equal(const uuid_t *u1, const uuid_t *u2)
60{
61 return memcmp(u1, u2, sizeof(uuid_t)) == 0;
62}
63
64static inline void uuid_copy(uuid_t *dst, const uuid_t *src)
65{
66 memcpy(dst, src, sizeof(uuid_t));
67}
68
69static inline bool uuid_is_null(const uuid_t *uuid)
70{
71 return uuid_equal(uuid, &uuid_null);
72}
73
74void generate_random_uuid(unsigned char uuid[16]);
75
76extern void guid_gen(guid_t *u);
77extern void uuid_gen(uuid_t *u);
78
79bool __must_check uuid_is_valid(const char *uuid);
80
81extern const u8 guid_index[16];
82extern const u8 uuid_index[16];
83
84int guid_parse(const char *uuid, guid_t *u);
85int uuid_parse(const char *uuid, uuid_t *u);
86
87/* backwards compatibility, don't use in new code */
88#define uuid_le_gen(u) guid_gen(u)
89#define uuid_le_to_bin(guid, u) guid_parse(guid, u)
90
91static inline int uuid_le_cmp(const guid_t u1, const guid_t u2)
92{
93 return memcmp(&u1, &u2, sizeof(guid_t));
94}
95
96#endif