Commit | Line | Data |
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1802d0be | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
fab1c232 HY |
2 | /* |
3 | * UUID/GUID definition | |
4 | * | |
e3a93bce | 5 | * Copyright (C) 2010, 2016 Intel Corp. |
fab1c232 | 6 | * Huang Ying <ying.huang@intel.com> |
fab1c232 | 7 | */ |
fab1c232 HY |
8 | #ifndef _LINUX_UUID_H_ |
9 | #define _LINUX_UUID_H_ | |
10 | ||
607ca46e | 11 | #include <uapi/linux/uuid.h> |
dfbc3c6c | 12 | #include <linux/string.h> |
fab1c232 | 13 | |
297b64c7 TB |
14 | #define UUID_SIZE 16 |
15 | ||
60927bc3 | 16 | typedef struct { |
297b64c7 | 17 | __u8 b[UUID_SIZE]; |
f9727a17 | 18 | } uuid_t; |
60927bc3 | 19 | |
f9727a17 CH |
20 | #define UUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ |
21 | ((uuid_t) \ | |
60927bc3 CH |
22 | {{ ((a) >> 24) & 0xff, ((a) >> 16) & 0xff, ((a) >> 8) & 0xff, (a) & 0xff, \ |
23 | ((b) >> 8) & 0xff, (b) & 0xff, \ | |
24 | ((c) >> 8) & 0xff, (c) & 0xff, \ | |
25 | (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) | |
26 | ||
2b1b0d66 AS |
27 | /* |
28 | * The length of a UUID string ("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee") | |
29 | * not including trailing NUL. | |
30 | */ | |
31 | #define UUID_STRING_LEN 36 | |
b544f3fd | 32 | |
ef40dda5 CH |
33 | extern const guid_t guid_null; |
34 | extern const uuid_t uuid_null; | |
35 | ||
df33767d CH |
36 | static inline bool guid_equal(const guid_t *u1, const guid_t *u2) |
37 | { | |
38 | return memcmp(u1, u2, sizeof(guid_t)) == 0; | |
39 | } | |
40 | ||
41 | static inline void guid_copy(guid_t *dst, const guid_t *src) | |
42 | { | |
43 | memcpy(dst, src, sizeof(guid_t)); | |
44 | } | |
45 | ||
63709fd4 | 46 | static inline bool guid_is_null(const guid_t *guid) |
ef40dda5 CH |
47 | { |
48 | return guid_equal(guid, &guid_null); | |
49 | } | |
50 | ||
df33767d CH |
51 | static inline bool uuid_equal(const uuid_t *u1, const uuid_t *u2) |
52 | { | |
53 | return memcmp(u1, u2, sizeof(uuid_t)) == 0; | |
54 | } | |
55 | ||
56 | static inline void uuid_copy(uuid_t *dst, const uuid_t *src) | |
57 | { | |
58 | memcpy(dst, src, sizeof(uuid_t)); | |
59 | } | |
60 | ||
63709fd4 | 61 | static inline bool uuid_is_null(const uuid_t *uuid) |
ef40dda5 CH |
62 | { |
63 | return uuid_equal(uuid, &uuid_null); | |
64 | } | |
65 | ||
8da4b8c4 AS |
66 | void generate_random_uuid(unsigned char uuid[16]); |
67 | ||
f9727a17 CH |
68 | extern void guid_gen(guid_t *u); |
69 | extern void uuid_gen(uuid_t *u); | |
fab1c232 | 70 | |
2b1b0d66 AS |
71 | bool __must_check uuid_is_valid(const char *uuid); |
72 | ||
f9727a17 CH |
73 | extern const u8 guid_index[16]; |
74 | extern const u8 uuid_index[16]; | |
75 | ||
76 | int guid_parse(const char *uuid, guid_t *u); | |
77 | int uuid_parse(const char *uuid, uuid_t *u); | |
2b1b0d66 | 78 | |
f9727a17 | 79 | /* backwards compatibility, don't use in new code */ |
f9727a17 | 80 | #define uuid_le_gen(u) guid_gen(u) |
f9727a17 | 81 | #define uuid_le_to_bin(guid, u) guid_parse(guid, u) |
f9727a17 CH |
82 | |
83 | static inline int uuid_le_cmp(const guid_t u1, const guid_t u2) | |
84 | { | |
85 | return memcmp(&u1, &u2, sizeof(guid_t)); | |
86 | } | |
87 | ||
fab1c232 | 88 | #endif |