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 9 struct test_uuid_data { 10 const char *uuid; 11 guid_t le; 12 uuid_t be; 13 }; 14 15 static 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 33 static 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 39 static 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 52 static 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 65 static 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 77 static 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 */ 97 static 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 } 107 108 static 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 } 118 119 static 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 } 129 130 static 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 } 140 141 static 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 }; 152 153 static struct kunit_suite uuid_test_suite = { 154 .name = "uuid", 155 .test_cases = uuid_test_cases, 156 }; 157 158 kunit_test_suite(uuid_test_suite); 159 160 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 161 MODULE_DESCRIPTION("Test cases for lib/uuid.c module"); 162 MODULE_LICENSE("Dual BSD/GPL"); 163