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Linux/lib/test_uuid.c

  1 /*
  2  * Test cases for lib/uuid.c module.
  3  */
  4 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  5 
  6 #include <linux/init.h>
  7 #include <linux/kernel.h>
  8 #include <linux/module.h>
  9 #include <linux/string.h>
 10 #include <linux/uuid.h>
 11 
 12 struct test_uuid_data {
 13         const char *uuid;
 14         uuid_le le;
 15         uuid_be be;
 16 };
 17 
 18 static const struct test_uuid_data test_uuid_test_data[] = {
 19         {
 20                 .uuid = "c33f4995-3701-450e-9fbf-206a2e98e576",
 21                 .le = UUID_LE(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
 22                 .be = UUID_BE(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
 23         },
 24         {
 25                 .uuid = "64b4371c-77c1-48f9-8221-29f054fc023b",
 26                 .le = UUID_LE(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
 27                 .be = UUID_BE(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
 28         },
 29         {
 30                 .uuid = "0cb4ddff-a545-4401-9d06-688af53e7f84",
 31                 .le = UUID_LE(0x0cb4ddff, 0xa545, 0x4401, 0x9d, 0x06, 0x68, 0x8a, 0xf5, 0x3e, 0x7f, 0x84),
 32                 .be = UUID_BE(0x0cb4ddff, 0xa545, 0x4401, 0x9d, 0x06, 0x68, 0x8a, 0xf5, 0x3e, 0x7f, 0x84),
 33         },
 34 };
 35 
 36 static const char * const test_uuid_wrong_data[] = {
 37         "c33f4995-3701-450e-9fbf206a2e98e576 ", /* no hyphen(s) */
 38         "64b4371c-77c1-48f9-8221-29f054XX023b", /* invalid character(s) */
 39         "0cb4ddff-a545-4401-9d06-688af53e",     /* not enough data */
 40 };
 41 
 42 static unsigned total_tests __initdata;
 43 static unsigned failed_tests __initdata;
 44 
 45 static void __init test_uuid_failed(const char *prefix, bool wrong, bool be,
 46                                     const char *data, const char *actual)
 47 {
 48         pr_err("%s test #%u %s %s data: '%s'\n",
 49                prefix,
 50                total_tests,
 51                wrong ? "passed on wrong" : "failed on",
 52                be ? "BE" : "LE",
 53                data);
 54         if (actual && *actual)
 55                 pr_err("%s test #%u actual data: '%s'\n",
 56                        prefix,
 57                        total_tests,
 58                        actual);
 59         failed_tests++;
 60 }
 61 
 62 static void __init test_uuid_test(const struct test_uuid_data *data)
 63 {
 64         uuid_le le;
 65         uuid_be be;
 66         char buf[48];
 67 
 68         /* LE */
 69         total_tests++;
 70         if (uuid_le_to_bin(data->uuid, &le))
 71                 test_uuid_failed("conversion", false, false, data->uuid, NULL);
 72 
 73         total_tests++;
 74         if (uuid_le_cmp(data->le, le)) {
 75                 sprintf(buf, "%pUl", &le);
 76                 test_uuid_failed("cmp", false, false, data->uuid, buf);
 77         }
 78 
 79         /* BE */
 80         total_tests++;
 81         if (uuid_be_to_bin(data->uuid, &be))
 82                 test_uuid_failed("conversion", false, true, data->uuid, NULL);
 83 
 84         total_tests++;
 85         if (uuid_be_cmp(data->be, be)) {
 86                 sprintf(buf, "%pUb", &be);
 87                 test_uuid_failed("cmp", false, true, data->uuid, buf);
 88         }
 89 }
 90 
 91 static void __init test_uuid_wrong(const char *data)
 92 {
 93         uuid_le le;
 94         uuid_be be;
 95 
 96         /* LE */
 97         total_tests++;
 98         if (!uuid_le_to_bin(data, &le))
 99                 test_uuid_failed("negative", true, false, data, NULL);
100 
101         /* BE */
102         total_tests++;
103         if (!uuid_be_to_bin(data, &be))
104                 test_uuid_failed("negative", true, true, data, NULL);
105 }
106 
107 static int __init test_uuid_init(void)
108 {
109         unsigned int i;
110 
111         for (i = 0; i < ARRAY_SIZE(test_uuid_test_data); i++)
112                 test_uuid_test(&test_uuid_test_data[i]);
113 
114         for (i = 0; i < ARRAY_SIZE(test_uuid_wrong_data); i++)
115                 test_uuid_wrong(test_uuid_wrong_data[i]);
116 
117         if (failed_tests == 0)
118                 pr_info("all %u tests passed\n", total_tests);
119         else
120                 pr_err("failed %u out of %u tests\n", failed_tests, total_tests);
121 
122         return failed_tests ? -EINVAL : 0;
123 }
124 module_init(test_uuid_init);
125 
126 static void __exit test_uuid_exit(void)
127 {
128         /* do nothing */
129 }
130 module_exit(test_uuid_exit);
131 
132 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
133 MODULE_LICENSE("Dual BSD/GPL");
134 

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