1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (C) 2014 Samsung Electronics 4 * Przemyslaw Marczak <p.marczak@samsung.com> 5 */ 6 #ifndef __UUID_H__ 7 #define __UUID_H__ 8 9 #include <linux/bitops.h> 10 11 /* This is structure is in big-endian */ 12 struct uuid { 13 unsigned int time_low; 14 unsigned short time_mid; 15 unsigned short time_hi_and_version; 16 unsigned char clock_seq_hi_and_reserved; 17 unsigned char clock_seq_low; 18 unsigned char node[6]; 19 } __packed; 20 21 /* Bits of a bitmask specifying the output format for GUIDs */ 22 #define UUID_STR_FORMAT_STD 0 23 #define UUID_STR_FORMAT_GUID BIT(0) 24 #define UUID_STR_UPPER_CASE BIT(1) 25 26 /* Use UUID_STR_LEN + 1 for string space */ 27 #define UUID_STR_LEN 36 28 #define UUID_BIN_LEN sizeof(struct uuid) 29 30 #define UUID_VERSION_MASK 0xf000 31 #define UUID_VERSION_SHIFT 12 32 #define UUID_VERSION 0x4 33 34 #define UUID_VARIANT_MASK 0xc0 35 #define UUID_VARIANT_SHIFT 7 36 #define UUID_VARIANT 0x1 37 38 int uuid_str_valid(const char *uuid); 39 int uuid_str_to_bin(const char *uuid_str, unsigned char *uuid_bin, 40 int str_format); 41 void uuid_bin_to_str(const unsigned char *uuid_bin, char *uuid_str, 42 int str_format); 43 int uuid_guid_get_bin(const char *guid_str, unsigned char *guid_bin); 44 const char *uuid_guid_get_str(const unsigned char *guid_bin); 45 void gen_rand_uuid(unsigned char *uuid_bin); 46 void gen_rand_uuid_str(char *uuid_str, int str_format); 47 #endif 48