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