uuid.c (c25141062a82ae8bddced1b3ce2b57a1c0efabe0) uuid.c (d063623b6ae7c326d21a2713dd38cab15d794c1c)
1/*
2 * Unified UUID/GUID definition
3 *
4 * Copyright (C) 2009, 2016 Intel Corp.
5 * Huang Ying <ying.huang@intel.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License version

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24const guid_t guid_null;
25EXPORT_SYMBOL(guid_null);
26const uuid_t uuid_null;
27EXPORT_SYMBOL(uuid_null);
28
29const u8 guid_index[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15};
30const u8 uuid_index[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
31
1/*
2 * Unified UUID/GUID definition
3 *
4 * Copyright (C) 2009, 2016 Intel Corp.
5 * Huang Ying <ying.huang@intel.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License version

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24const guid_t guid_null;
25EXPORT_SYMBOL(guid_null);
26const uuid_t uuid_null;
27EXPORT_SYMBOL(uuid_null);
28
29const u8 guid_index[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15};
30const u8 uuid_index[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
31
32/***************************************************************
32/**
33 * generate_random_uuid - generate a random UUID
34 * @uuid: where to put the generated UUID
35 *
33 * Random UUID interface
34 *
36 * Random UUID interface
37 *
35 * Used here for a Boot ID, but can be useful for other kernel
36 * drivers.
37 ***************************************************************/
38
39/*
40 * Generate random UUID
38 * Used to create a Boot ID or a filesystem UUID/GUID, but can be
39 * useful for other kernel drivers.
41 */
42void generate_random_uuid(unsigned char uuid[16])
43{
44 get_random_bytes(uuid, 16);
45 /* Set UUID version to 4 --- truly random generation */
46 uuid[6] = (uuid[6] & 0x0F) | 0x40;
47 /* Set the UUID variant to DCE */
48 uuid[8] = (uuid[8] & 0x3F) | 0x80;

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68{
69 __uuid_gen_common(bu->b);
70 /* version 4 : random generation */
71 bu->b[6] = (bu->b[6] & 0x0F) | 0x40;
72}
73EXPORT_SYMBOL_GPL(uuid_gen);
74
75/**
40 */
41void generate_random_uuid(unsigned char uuid[16])
42{
43 get_random_bytes(uuid, 16);
44 /* Set UUID version to 4 --- truly random generation */
45 uuid[6] = (uuid[6] & 0x0F) | 0x40;
46 /* Set the UUID variant to DCE */
47 uuid[8] = (uuid[8] & 0x3F) | 0x80;

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67{
68 __uuid_gen_common(bu->b);
69 /* version 4 : random generation */
70 bu->b[6] = (bu->b[6] & 0x0F) | 0x40;
71}
72EXPORT_SYMBOL_GPL(uuid_gen);
73
74/**
76 * uuid_is_valid - checks if UUID string valid
77 * @uuid: UUID string to check
78 *
79 * Description:
80 * It checks if the UUID string is following the format:
81 * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
82 * where x is a hex digit.
83 *
84 * Return: true if input is valid UUID string.
85 */
75 * uuid_is_valid - checks if a UUID string is valid
76 * @uuid: UUID string to check
77 *
78 * Description:
79 * It checks if the UUID string is following the format:
80 * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
81 *
82 * where x is a hex digit.
83 *
84 * Return: true if input is valid UUID string.
85 */
86bool uuid_is_valid(const char *uuid)
87{
88 unsigned int i;
89
90 for (i = 0; i < UUID_STRING_LEN; i++) {
91 if (i == 8 || i == 13 || i == 18 || i == 23) {
92 if (uuid[i] != '-')
93 return false;

--- 38 unchanged lines hidden --- 		86bool uuid_is_valid(const char *uuid)
87{
88 unsigned int i;
89
90 for (i = 0; i < UUID_STRING_LEN; i++) {
91 if (i == 8 || i == 13 || i == 18 || i == 23) {
92 if (uuid[i] != '-')
93 return false;

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