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
guid_equal(const guid_t * u1,const guid_t * u2)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
guid_copy(guid_t * dst,const guid_t * src)48 static inline void guid_copy(guid_t *dst, const guid_t *src)
49 {
50 memcpy(dst, src, sizeof(guid_t));
51 }
52
guid_is_null(const guid_t * guid)53 static inline bool guid_is_null(const guid_t *guid)
54 {
55 return guid_equal(guid, &guid_null);
56 }
57
uuid_equal(const uuid_t * u1,const uuid_t * u2)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
uuid_copy(uuid_t * dst,const uuid_t * src)63 static inline void uuid_copy(uuid_t *dst, const uuid_t *src)
64 {
65 memcpy(dst, src, sizeof(uuid_t));
66 }
67
uuid_is_null(const uuid_t * uuid)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
uuid_le_cmp(const guid_t u1,const guid_t u2)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
96