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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/uuid.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2010, 2016 Intel Corp.
6 * Huang Ying <ying.huang@intel.com>
11 #include <uapi/linux/uuid.h>
12 #include <linux/string.h>
20 #define UUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
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) }})
28 * The length of a UUID string ("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")
29 * not including trailing NUL.
31 #define UUID_STRING_LEN 36
33 extern const guid_t guid_null
;
34 extern const uuid_t uuid_null
;
36 static inline bool guid_equal(const guid_t
*u1
, const guid_t
*u2
)
38 return memcmp(u1
, u2
, sizeof(guid_t
)) == 0;
41 static inline void guid_copy(guid_t
*dst
, const guid_t
*src
)
43 memcpy(dst
, src
, sizeof(guid_t
));
46 static inline void import_guid(guid_t
*dst
, const __u8
*src
)
48 memcpy(dst
, src
, sizeof(guid_t
));
51 static inline void export_guid(__u8
*dst
, const guid_t
*src
)
53 memcpy(dst
, src
, sizeof(guid_t
));
56 static inline bool guid_is_null(const guid_t
*guid
)
58 return guid_equal(guid
, &guid_null
);
61 static inline bool uuid_equal(const uuid_t
*u1
, const uuid_t
*u2
)
63 return memcmp(u1
, u2
, sizeof(uuid_t
)) == 0;
66 static inline void uuid_copy(uuid_t
*dst
, const uuid_t
*src
)
68 memcpy(dst
, src
, sizeof(uuid_t
));
71 static inline void import_uuid(uuid_t
*dst
, const __u8
*src
)
73 memcpy(dst
, src
, sizeof(uuid_t
));
76 static inline void export_uuid(__u8
*dst
, const uuid_t
*src
)
78 memcpy(dst
, src
, sizeof(uuid_t
));
81 static inline bool uuid_is_null(const uuid_t
*uuid
)
83 return uuid_equal(uuid
, &uuid_null
);
86 void generate_random_uuid(unsigned char uuid
[16]);
87 void generate_random_guid(unsigned char guid
[16]);
89 extern void guid_gen(guid_t
*u
);
90 extern void uuid_gen(uuid_t
*u
);
92 bool __must_check
uuid_is_valid(const char *uuid
);
94 extern const u8 guid_index
[16];
95 extern const u8 uuid_index
[16];
97 int guid_parse(const char *uuid
, guid_t
*u
);
98 int uuid_parse(const char *uuid
, uuid_t
*u
);
100 /* backwards compatibility, don't use in new code */
101 static inline int uuid_le_cmp(const guid_t u1
, const guid_t u2
)
103 return memcmp(&u1
, &u2
, sizeof(guid_t
));