1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * UUID/GUID definition |
4 | * |
5 | * Copyright (C) 2010, 2016 Intel Corp. |
6 | * Huang Ying <ying.huang@intel.com> |
7 | */ |
8 | #ifndef _LINUX_UUID_H_ |
9 | #define _LINUX_UUID_H_ |
10 | |
11 | #include <linux/string.h> |
12 | |
13 | #define UUID_SIZE 16 |
14 | |
15 | typedef struct { |
16 | __u8 b[UUID_SIZE]; |
17 | } guid_t; |
18 | |
19 | typedef struct { |
20 | __u8 b[UUID_SIZE]; |
21 | } uuid_t; |
22 | |
23 | #define GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ |
24 | ((guid_t) \ |
25 | {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ |
26 | (b) & 0xff, ((b) >> 8) & 0xff, \ |
27 | (c) & 0xff, ((c) >> 8) & 0xff, \ |
28 | (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) |
29 | |
30 | #define UUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ |
31 | ((uuid_t) \ |
32 | {{ ((a) >> 24) & 0xff, ((a) >> 16) & 0xff, ((a) >> 8) & 0xff, (a) & 0xff, \ |
33 | ((b) >> 8) & 0xff, (b) & 0xff, \ |
34 | ((c) >> 8) & 0xff, (c) & 0xff, \ |
35 | (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) |
36 | |
37 | /* |
38 | * The length of a UUID string ("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee") |
39 | * not including trailing NUL. |
40 | */ |
41 | #define UUID_STRING_LEN 36 |
42 | |
43 | extern const guid_t guid_null; |
44 | extern const uuid_t uuid_null; |
45 | |
46 | static inline bool guid_equal(const guid_t *u1, const guid_t *u2) |
47 | { |
48 | return memcmp(p: u1, q: u2, size: sizeof(guid_t)) == 0; |
49 | } |
50 | |
51 | static inline void guid_copy(guid_t *dst, const guid_t *src) |
52 | { |
53 | memcpy(dst, src, sizeof(guid_t)); |
54 | } |
55 | |
56 | static inline void import_guid(guid_t *dst, const __u8 *src) |
57 | { |
58 | memcpy(dst, src, sizeof(guid_t)); |
59 | } |
60 | |
61 | static inline void export_guid(__u8 *dst, const guid_t *src) |
62 | { |
63 | memcpy(dst, src, sizeof(guid_t)); |
64 | } |
65 | |
66 | static inline bool guid_is_null(const guid_t *guid) |
67 | { |
68 | return guid_equal(u1: guid, u2: &guid_null); |
69 | } |
70 | |
71 | static inline bool uuid_equal(const uuid_t *u1, const uuid_t *u2) |
72 | { |
73 | return memcmp(p: u1, q: u2, size: sizeof(uuid_t)) == 0; |
74 | } |
75 | |
76 | static inline void uuid_copy(uuid_t *dst, const uuid_t *src) |
77 | { |
78 | memcpy(dst, src, sizeof(uuid_t)); |
79 | } |
80 | |
81 | static inline void import_uuid(uuid_t *dst, const __u8 *src) |
82 | { |
83 | memcpy(dst, src, sizeof(uuid_t)); |
84 | } |
85 | |
86 | static inline void export_uuid(__u8 *dst, const uuid_t *src) |
87 | { |
88 | memcpy(dst, src, sizeof(uuid_t)); |
89 | } |
90 | |
91 | static inline bool uuid_is_null(const uuid_t *uuid) |
92 | { |
93 | return uuid_equal(u1: uuid, u2: &uuid_null); |
94 | } |
95 | |
96 | void generate_random_uuid(unsigned char uuid[16]); |
97 | void generate_random_guid(unsigned char guid[16]); |
98 | |
99 | extern void guid_gen(guid_t *u); |
100 | extern void uuid_gen(uuid_t *u); |
101 | |
102 | bool __must_check uuid_is_valid(const char *uuid); |
103 | |
104 | extern const u8 guid_index[16]; |
105 | extern const u8 uuid_index[16]; |
106 | |
107 | int guid_parse(const char *uuid, guid_t *u); |
108 | int uuid_parse(const char *uuid, uuid_t *u); |
109 | |
110 | #endif |
111 | |