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");