include/uuid.h

   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 #define UUID_STR_LEN            36
  27 #define UUID_BIN_LEN            sizeof(struct uuid)
  28
  29 #define UUID_VERSION_MASK       0xf000
  30 #define UUID_VERSION_SHIFT      12
  31 #define UUID_VERSION            0x4
  32
  33 #define UUID_VARIANT_MASK       0xc0
  34 #define UUID_VARIANT_SHIFT      7
  35 #define UUID_VARIANT            0x1
  36
  37 int uuid_str_valid(const char *uuid);
  38 int uuid_str_to_bin(const char *uuid_str, unsigned char *uuid_bin,
  39                     int str_format);
  40 void uuid_bin_to_str(const unsigned char *uuid_bin, char *uuid_str,
  41                      int str_format);
  42 #ifdef CONFIG_PARTITION_TYPE_GUID
  43 int uuid_guid_get_bin(const char *guid_str, unsigned char *guid_bin);
  44 int uuid_guid_get_str(const unsigned char *guid_bin, char *guid_str);
  45 #endif
  46 void gen_rand_uuid(unsigned char *uuid_bin);
  47 void gen_rand_uuid_str(char *uuid_str, int str_format);
  48 #endif