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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/uuid.h
4 * Copyright (C) 2010, 2016 Intel Corp.
5 * Huang Ying <ying.huang@intel.com>
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;
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.
16 #ifndef _LINUX_UUID_H_
17 #define _LINUX_UUID_H_
19 #include <uapi/linux/uuid.h>
27 #define UUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
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) }})
35 * The length of a UUID string ("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")
36 * not including trailing NUL.
38 #define UUID_STRING_LEN 36
40 extern const guid_t guid_null
;
41 extern const uuid_t uuid_null
;
43 static inline bool guid_equal(const guid_t
*u1
, const guid_t
*u2
)
45 return memcmp(u1
, u2
, sizeof(guid_t
)) == 0;
48 static inline void guid_copy(guid_t
*dst
, const guid_t
*src
)
50 memcpy(dst
, src
, sizeof(guid_t
));
53 static inline bool guid_is_null(const guid_t
*guid
)
55 return guid_equal(guid
, &guid_null
);
58 static inline bool uuid_equal(const uuid_t
*u1
, const uuid_t
*u2
)
60 return memcmp(u1
, u2
, sizeof(uuid_t
)) == 0;
63 static inline void uuid_copy(uuid_t
*dst
, const uuid_t
*src
)
65 memcpy(dst
, src
, sizeof(uuid_t
));
68 static inline bool uuid_is_null(const uuid_t
*uuid
)
70 return uuid_equal(uuid
, &uuid_null
);
73 void generate_random_uuid(unsigned char uuid
[16]);
75 extern void guid_gen(guid_t
*u
);
76 extern void uuid_gen(uuid_t
*u
);
78 bool __must_check
uuid_is_valid(const char *uuid
);
80 extern const u8 guid_index
[16];
81 extern const u8 uuid_index
[16];
83 int guid_parse(const char *uuid
, guid_t
*u
);
84 int uuid_parse(const char *uuid
, uuid_t
*u
);
86 /* backwards compatibility, don't use in new code */
87 typedef uuid_t uuid_be
;
88 #define UUID_BE(a, _b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
89 UUID_INIT(a, _b, c, d0, d1, d2, d3, d4, d5, d6, d7)
90 #define NULL_UUID_BE \
91 UUID_BE(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, \
92 0x00, 0x00, 0x00, 0x00)
94 #define uuid_le_gen(u) guid_gen(u)
95 #define uuid_be_gen(u) uuid_gen(u)
96 #define uuid_le_to_bin(guid, u) guid_parse(guid, u)
97 #define uuid_be_to_bin(uuid, u) uuid_parse(uuid, u)
99 static inline int uuid_le_cmp(const guid_t u1
, const guid_t u2
)
101 return memcmp(&u1
, &u2
, sizeof(guid_t
));
104 static inline int uuid_be_cmp(const uuid_t u1
, const uuid_t u2
)
106 return memcmp(&u1
, &u2
, sizeof(uuid_t
));