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 <linux/string.h> 12 13 #define UUID_SIZE 16 14 15 typedef struct { 16 __u8 b[UUID_SIZE]; 17 } guid_t; 18 19 typedef struct { 20 __u8 b[UUID_SIZE]; 21 } uuid_t; 22 23 #define GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ 24 ((guid_t) \ 25 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ 26 (b) & 0xff, ((b) >> 8) & 0xff, \ 27 (c) & 0xff, ((c) >> 8) & 0xff, \ 28 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) 29 30 #define UUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ 31 ((uuid_t) \ 32 {{ ((a) >> 24) & 0xff, ((a) >> 16) & 0xff, ((a) >> 8) & 0xff, (a) & 0xff, \ 33 ((b) >> 8) & 0xff, (b) & 0xff, \ 34 ((c) >> 8) & 0xff, (c) & 0xff, \ 35 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) 36 37 /* 38 * The length of a UUID string ("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee") 39 * not including trailing NUL. 40 */ 41 #define UUID_STRING_LEN 36 42 43 extern const guid_t guid_null; 44 extern const uuid_t uuid_null; 45 46 static inline bool guid_equal(const guid_t *u1, const guid_t *u2) 47 { 48 return memcmp(u1, u2, sizeof(guid_t)) == 0; 49 } 50 51 static inline void guid_copy(guid_t *dst, const guid_t *src) 52 { 53 memcpy(dst, src, sizeof(guid_t)); 54 } 55 56 static inline void import_guid(guid_t *dst, const __u8 *src) 57 { 58 memcpy(dst, src, sizeof(guid_t)); 59 } 60 61 static inline void export_guid(__u8 *dst, const guid_t *src) 62 { 63 memcpy(dst, src, sizeof(guid_t)); 64 } 65 66 static inline bool guid_is_null(const guid_t *guid) 67 { 68 return guid_equal(guid, &guid_null); 69 } 70 71 static inline bool uuid_equal(const uuid_t *u1, const uuid_t *u2) 72 { 73 return memcmp(u1, u2, sizeof(uuid_t)) == 0; 74 } 75 76 static inline void uuid_copy(uuid_t *dst, const uuid_t *src) 77 { 78 memcpy(dst, src, sizeof(uuid_t)); 79 } 80 81 static inline void import_uuid(uuid_t *dst, const __u8 *src) 82 { 83 memcpy(dst, src, sizeof(uuid_t)); 84 } 85 86 static inline void export_uuid(__u8 *dst, const uuid_t *src) 87 { 88 memcpy(dst, src, sizeof(uuid_t)); 89 } 90 91 static inline bool uuid_is_null(const uuid_t *uuid) 92 { 93 return uuid_equal(uuid, &uuid_null); 94 } 95 96 void generate_random_uuid(unsigned char uuid[16]); 97 void generate_random_guid(unsigned char guid[16]); 98 99 extern void guid_gen(guid_t *u); 100 extern void uuid_gen(uuid_t *u); 101 102 bool __must_check uuid_is_valid(const char *uuid); 103 104 extern const u8 guid_index[16]; 105 extern const u8 uuid_index[16]; 106 107 int guid_parse(const char *uuid, guid_t *u); 108 int uuid_parse(const char *uuid, uuid_t *u); 109 110 /* MEI UUID type, don't use anywhere else */ 111 #include <uapi/linux/uuid.h> 112 113 #endif 114