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 <uapi/linux/uuid.h>
12 #include <linux/string.h>
13
14 #define UUID_SIZE 16
15
16 typedef struct {
17 __u8 b[UUID_SIZE];
18 } uuid_t;
19
20 #define UUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
21 ((uuid_t) \
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
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
32
33 extern const guid_t guid_null;
34 extern const uuid_t uuid_null;
35
guid_equal(const guid_t * u1,const guid_t * u2)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
guid_copy(guid_t * dst,const guid_t * src)41 static inline void guid_copy(guid_t *dst, const guid_t *src)
42 {
43 memcpy(dst, src, sizeof(guid_t));
44 }
45
import_guid(guid_t * dst,const __u8 * src)46 static inline void import_guid(guid_t *dst, const __u8 *src)
47 {
48 memcpy(dst, src, sizeof(guid_t));
49 }
50
export_guid(__u8 * dst,const guid_t * src)51 static inline void export_guid(__u8 *dst, const guid_t *src)
52 {
53 memcpy(dst, src, sizeof(guid_t));
54 }
55
guid_is_null(const guid_t * guid)56 static inline bool guid_is_null(const guid_t *guid)
57 {
58 return guid_equal(guid, &guid_null);
59 }
60
uuid_equal(const uuid_t * u1,const uuid_t * u2)61 static inline bool uuid_equal(const uuid_t *u1, const uuid_t *u2)
62 {
63 return memcmp(u1, u2, sizeof(uuid_t)) == 0;
64 }
65
uuid_copy(uuid_t * dst,const uuid_t * src)66 static inline void uuid_copy(uuid_t *dst, const uuid_t *src)
67 {
68 memcpy(dst, src, sizeof(uuid_t));
69 }
70
import_uuid(uuid_t * dst,const __u8 * src)71 static inline void import_uuid(uuid_t *dst, const __u8 *src)
72 {
73 memcpy(dst, src, sizeof(uuid_t));
74 }
75
export_uuid(__u8 * dst,const uuid_t * src)76 static inline void export_uuid(__u8 *dst, const uuid_t *src)
77 {
78 memcpy(dst, src, sizeof(uuid_t));
79 }
80
uuid_is_null(const uuid_t * uuid)81 static inline bool uuid_is_null(const uuid_t *uuid)
82 {
83 return uuid_equal(uuid, &uuid_null);
84 }
85
86 void generate_random_uuid(unsigned char uuid[16]);
87 void generate_random_guid(unsigned char guid[16]);
88
89 extern void guid_gen(guid_t *u);
90 extern void uuid_gen(uuid_t *u);
91
92 bool __must_check uuid_is_valid(const char *uuid);
93
94 extern const u8 guid_index[16];
95 extern const u8 uuid_index[16];
96
97 int guid_parse(const char *uuid, guid_t *u);
98 int uuid_parse(const char *uuid, uuid_t *u);
99
100 /* backwards compatibility, don't use in new code */
uuid_le_cmp(const guid_t u1,const guid_t u2)101 static inline int uuid_le_cmp(const guid_t u1, const guid_t u2)
102 {
103 return memcmp(&u1, &u2, sizeof(guid_t));
104 }
105
106 #endif
107