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 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 41 static inline void guid_copy(guid_t *dst, const guid_t *src) 42 { 43 memcpy(dst, src, sizeof(guid_t)); 44 } 45 46 static inline void import_guid(guid_t *dst, const __u8 *src) 47 { 48 memcpy(dst, src, sizeof(guid_t)); 49 } 50 51 static inline void export_guid(__u8 *dst, const guid_t *src) 52 { 53 memcpy(dst, src, sizeof(guid_t)); 54 } 55 56 static inline bool guid_is_null(const guid_t *guid) 57 { 58 return guid_equal(guid, &guid_null); 59 } 60 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 66 static inline void uuid_copy(uuid_t *dst, const uuid_t *src) 67 { 68 memcpy(dst, src, sizeof(uuid_t)); 69 } 70 71 static inline void import_uuid(uuid_t *dst, const __u8 *src) 72 { 73 memcpy(dst, src, sizeof(uuid_t)); 74 } 75 76 static inline void export_uuid(__u8 *dst, const uuid_t *src) 77 { 78 memcpy(dst, src, sizeof(uuid_t)); 79 } 80 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 */ 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