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 15typedef struct { 16 __u8 b[UUID_SIZE]; 17} guid_t; 18 19typedef 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 43extern const guid_t guid_null; 44extern const uuid_t uuid_null; 45 46static inline bool guid_equal(const guid_t *u1, const guid_t *u2) 47{ 48 return memcmp(u1, u2, sizeof(guid_t)) == 0; 49} 50 51static inline void guid_copy(guid_t *dst, const guid_t *src) 52{ 53 memcpy(dst, src, sizeof(guid_t)); 54} 55 56static inline void import_guid(guid_t *dst, const __u8 *src) 57{ 58 memcpy(dst, src, sizeof(guid_t)); 59} 60 61static inline void export_guid(__u8 *dst, const guid_t *src) 62{ 63 memcpy(dst, src, sizeof(guid_t)); 64} 65 66static inline bool guid_is_null(const guid_t *guid) 67{ 68 return guid_equal(guid, &guid_null); 69} 70 71static inline bool uuid_equal(const uuid_t *u1, const uuid_t *u2) 72{ 73 return memcmp(u1, u2, sizeof(uuid_t)) == 0; 74} 75 76static inline void uuid_copy(uuid_t *dst, const uuid_t *src) 77{ 78 memcpy(dst, src, sizeof(uuid_t)); 79} 80 81static inline void import_uuid(uuid_t *dst, const __u8 *src) 82{ 83 memcpy(dst, src, sizeof(uuid_t)); 84} 85 86static inline void export_uuid(__u8 *dst, const uuid_t *src) 87{ 88 memcpy(dst, src, sizeof(uuid_t)); 89} 90 91static inline bool uuid_is_null(const uuid_t *uuid) 92{ 93 return uuid_equal(uuid, &uuid_null); 94} 95 96void generate_random_uuid(unsigned char uuid[16]); 97void generate_random_guid(unsigned char guid[16]); 98 99extern void guid_gen(guid_t *u); 100extern void uuid_gen(uuid_t *u); 101 102bool __must_check uuid_is_valid(const char *uuid); 103 104extern const u8 guid_index[16]; 105extern const u8 uuid_index[16]; 106 107int guid_parse(const char *uuid, guid_t *u); 108int uuid_parse(const char *uuid, uuid_t *u); 109 110#endif 111