text: /*
   * Test cases for lib/uuid.c module.
   */
  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/string.h>
  #include <linux/uuid.h>
  
  struct test_uuid_data {
  	const char *uuid;
  	guid_t le;
  	uuid_t be;
  };
  
  static const struct test_uuid_data test_uuid_test_data[] = {
  	{
  		.uuid = "c33f4995-3701-450e-9fbf-206a2e98e576",
  		.le = GUID_INIT(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
  		.be = UUID_INIT(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
  	},
  	{
  		.uuid = "64b4371c-77c1-48f9-8221-29f054fc023b",
  		.le = GUID_INIT(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
  		.be = UUID_INIT(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
  	},
  	{
  		.uuid = "0cb4ddff-a545-4401-9d06-688af53e7f84",
  		.le = GUID_INIT(0x0cb4ddff, 0xa545, 0x4401, 0x9d, 0x06, 0x68, 0x8a, 0xf5, 0x3e, 0x7f, 0x84),
  		.be = UUID_INIT(0x0cb4ddff, 0xa545, 0x4401, 0x9d, 0x06, 0x68, 0x8a, 0xf5, 0x3e, 0x7f, 0x84),
  	},
  };
  
  static const char * const test_uuid_wrong_data[] = {
  	"c33f4995-3701-450e-9fbf206a2e98e576 ",	/* no hyphen(s) */
  	"64b4371c-77c1-48f9-8221-29f054XX023b",	/* invalid character(s) */
  	"0cb4ddff-a545-4401-9d06-688af53e",	/* not enough data */
  };
  
  static unsigned total_tests __initdata;
  static unsigned failed_tests __initdata;
  
  static void __init test_uuid_failed(const char *prefix, bool wrong, bool be,
  				    const char *data, const char *actual)
  {
  	pr_err("%s test #%u %s %s data: '%s'\n",
  	       prefix,
  	       total_tests,
  	       wrong ? "passed on wrong" : "failed on",
  	       be ? "BE" : "LE",
  	       data);
  	if (actual && *actual)
  		pr_err("%s test #%u actual data: '%s'\n",
  		       prefix,
  		       total_tests,
  		       actual);
  	failed_tests++;
  }
  
  static void __init test_uuid_test(const struct test_uuid_data *data)
  {
  	guid_t le;
  	uuid_t be;
  	char buf[48];
  
  	/* LE */
  	total_tests++;
  	if (guid_parse(data->uuid, &le))
  		test_uuid_failed("conversion", false, false, data->uuid, NULL);
  
  	total_tests++;
  	if (!guid_equal(&data->le, &le)) {
  		sprintf(buf, "%pUl", &le);
  		test_uuid_failed("cmp", false, false, data->uuid, buf);
  	}
  
  	/* BE */
  	total_tests++;
  	if (uuid_parse(data->uuid, &be))
  		test_uuid_failed("conversion", false, true, data->uuid, NULL);
  
  	total_tests++;
  	if (!uuid_equal(&data->be, &be)) {
  		sprintf(buf, "%pUb", &be);
  		test_uuid_failed("cmp", false, true, data->uuid, buf);
  	}
  }
  
  static void __init test_uuid_wrong(const char *data)
  {
  	guid_t le;
  	uuid_t be;
  
  	/* LE */
  	total_tests++;
  	if (!guid_parse(data, &le))
  		test_uuid_failed("negative", true, false, data, NULL);
  
  	/* BE */
  	total_tests++;
  	if (!uuid_parse(data, &be))
  		test_uuid_failed("negative", true, true, data, NULL);
  }
  
  static int __init test_uuid_init(void)
  {
  	unsigned int i;
  
  	for (i = 0; i < ARRAY_SIZE(test_uuid_test_data); i++)
  		test_uuid_test(&test_uuid_test_data[i]);
  
  	for (i = 0; i < ARRAY_SIZE(test_uuid_wrong_data); i++)
  		test_uuid_wrong(test_uuid_wrong_data[i]);
  
  	if (failed_tests == 0)
  		pr_info("all %u tests passed\n", total_tests);
  	else
  		pr_err("failed %u out of %u tests\n", failed_tests, total_tests);
  
  	return failed_tests ? -EINVAL : 0;
  }
  module_init(test_uuid_init);
  
  static void __exit test_uuid_exit(void)
  {
  	/* do nothing */
  }
  module_exit(test_uuid_exit);
  
  MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
  MODULE_LICENSE("Dual BSD/GPL");
  