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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/*
3 * Test cases for lib/uuid.c module.
4 */
5
6#include <kunit/test.h>
7#include <linux/uuid.h>
8
9struct test_uuid_data {
10 const char *uuid;
11 guid_t le;
12 uuid_t be;
13};
14
15static const struct test_uuid_data test_uuid_test_data[] = {
16 {
17 .uuid = "c33f4995-3701-450e-9fbf-206a2e98e576",
18 .le = GUID_INIT(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
19 .be = UUID_INIT(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
20 },
21 {
22 .uuid = "64b4371c-77c1-48f9-8221-29f054fc023b",
23 .le = GUID_INIT(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
24 .be = UUID_INIT(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
25 },
26 {
27 .uuid = "0cb4ddff-a545-4401-9d06-688af53e7f84",
28 .le = GUID_INIT(0x0cb4ddff, 0xa545, 0x4401, 0x9d, 0x06, 0x68, 0x8a, 0xf5, 0x3e, 0x7f, 0x84),
29 .be = UUID_INIT(0x0cb4ddff, 0xa545, 0x4401, 0x9d, 0x06, 0x68, 0x8a, 0xf5, 0x3e, 0x7f, 0x84),
30 },
31};
32
33static const char * const test_uuid_wrong_data[] = {
34 "c33f4995-3701-450e-9fbf206a2e98e576 ", /* no hyphen(s) */
35 "64b4371c-77c1-48f9-8221-29f054XX023b", /* invalid character(s) */
36 "0cb4ddff-a545-4401-9d06-688af53e", /* not enough data */
37};
38
39static void uuid_test_guid_valid(struct kunit *test)
40{
41 unsigned int i;
42 const struct test_uuid_data *data;
43 guid_t le;
44
45 for (i = 0; i < ARRAY_SIZE(test_uuid_test_data); i++) {
46 data = &test_uuid_test_data[i];
47 KUNIT_EXPECT_EQ(test, guid_parse(data->uuid, &le), 0);
48 KUNIT_EXPECT_TRUE(test, guid_equal(&data->le, &le));
49 }
50}
51
52static void uuid_test_uuid_valid(struct kunit *test)
53{
54 unsigned int i;
55 const struct test_uuid_data *data;
56 uuid_t be;
57
58 for (i = 0; i < ARRAY_SIZE(test_uuid_test_data); i++) {
59 data = &test_uuid_test_data[i];
60 KUNIT_EXPECT_EQ(test, uuid_parse(data->uuid, &be), 0);
61 KUNIT_EXPECT_TRUE(test, uuid_equal(&data->be, &be));
62 }
63}
64
65static void uuid_test_guid_invalid(struct kunit *test)
66{
67 unsigned int i;
68 const char *uuid;
69 guid_t le;
70
71 for (i = 0; i < ARRAY_SIZE(test_uuid_wrong_data); i++) {
72 uuid = test_uuid_wrong_data[i];
73 KUNIT_EXPECT_EQ(test, guid_parse(uuid, &le), -EINVAL);
74 }
75}
76
77static void uuid_test_uuid_invalid(struct kunit *test)
78{
79 unsigned int i;
80 const char *uuid;
81 uuid_t be;
82
83 for (i = 0; i < ARRAY_SIZE(test_uuid_wrong_data); i++) {
84 uuid = test_uuid_wrong_data[i];
85 KUNIT_EXPECT_EQ(test, uuid_parse(uuid, &be), -EINVAL);
86 }
87}
88
89/*
90 * RFC 4122 section 4.4 says random UUIDs/GUIDs (version 4) must have:
91 * - version 4 in the high nibble of the version byte,
92 * - variant DCE 1.1 (binary 10x) in the high bits of byte 8.
93 *
94 * The version byte is byte 6 in the "wire" uuid_t layout and byte 7 in
95 * the byte-swapped guid_t layout.
96 */
97static void uuid_test_uuid_gen(struct kunit *test)
98{
99 uuid_t u;
100
101 for (unsigned int i = 0; i < 8; i++) {
102 uuid_gen(&u);
103 KUNIT_EXPECT_EQ(test, u.b[6] & 0xf0, 0x40);
104 KUNIT_EXPECT_EQ(test, u.b[8] & 0xc0, 0x80);
105 }
106}
107
108static void uuid_test_guid_gen(struct kunit *test)
109{
110 guid_t g;
111
112 for (unsigned int i = 0; i < 8; i++) {
113 guid_gen(&g);
114 KUNIT_EXPECT_EQ(test, g.b[7] & 0xf0, 0x40);
115 KUNIT_EXPECT_EQ(test, g.b[8] & 0xc0, 0x80);
116 }
117}
118
119static void uuid_test_generate_random_uuid(struct kunit *test)
120{
121 unsigned char buf[16];
122
123 for (unsigned int i = 0; i < 8; i++) {
124 generate_random_uuid(buf);
125 KUNIT_EXPECT_EQ(test, buf[6] & 0xf0, 0x40);
126 KUNIT_EXPECT_EQ(test, buf[8] & 0xc0, 0x80);
127 }
128}
129
130static void uuid_test_generate_random_guid(struct kunit *test)
131{
132 unsigned char buf[16];
133
134 for (unsigned int i = 0; i < 8; i++) {
135 generate_random_guid(buf);
136 KUNIT_EXPECT_EQ(test, buf[7] & 0xf0, 0x40);
137 KUNIT_EXPECT_EQ(test, buf[8] & 0xc0, 0x80);
138 }
139}
140
141static struct kunit_case uuid_test_cases[] = {
142 KUNIT_CASE(uuid_test_guid_valid),
143 KUNIT_CASE(uuid_test_uuid_valid),
144 KUNIT_CASE(uuid_test_guid_invalid),
145 KUNIT_CASE(uuid_test_uuid_invalid),
146 KUNIT_CASE(uuid_test_uuid_gen),
147 KUNIT_CASE(uuid_test_guid_gen),
148 KUNIT_CASE(uuid_test_generate_random_uuid),
149 KUNIT_CASE(uuid_test_generate_random_guid),
150 {},
151};
152
153static struct kunit_suite uuid_test_suite = {
154 .name = "uuid",
155 .test_cases = uuid_test_cases,
156};
157
158kunit_test_suite(uuid_test_suite);
159
160MODULE_AUTHOR("Andy Shevchenko <[email protected]>");
161MODULE_DESCRIPTION("Test cases for lib/uuid.c module");
162MODULE_LICENSE("Dual BSD/GPL");