/*
 * 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;
	uuid_le le;
	uuid_be be;
};

static const struct test_uuid_data test_uuid_test_data[] = {
	{
		.uuid = "c33f4995-3701-450e-9fbf-206a2e98e576",
		.le = UUID_LE(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
		.be = UUID_BE(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
	},
	{
		.uuid = "64b4371c-77c1-48f9-8221-29f054fc023b",
		.le = UUID_LE(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
		.be = UUID_BE(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
	},
	{
		.uuid = "0cb4ddff-a545-4401-9d06-688af53e7f84",
		.le = UUID_LE(0x0cb4ddff, 0xa545, 0x4401, 0x9d, 0x06, 0x68, 0x8a, 0xf5, 0x3e, 0x7f, 0x84),
		.be = UUID_BE(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)
{
	uuid_le le;
	uuid_be be;
	char buf[48];

	/* LE */
	total_tests++;
	if (uuid_le_to_bin(data->uuid, &le))
		test_uuid_failed("conversion", false, false, data->uuid, NULL);

	total_tests++;
	if (uuid_le_cmp(data->le, le)) {
		sprintf(buf, "%pUl", &le);
		test_uuid_failed("cmp", false, false, data->uuid, buf);
	}

	/* BE */
	total_tests++;
	if (uuid_be_to_bin(data->uuid, &be))
		test_uuid_failed("conversion", false, true, data->uuid, NULL);

	total_tests++;
	if (uuid_be_cmp(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)
{
	uuid_le le;
	uuid_be be;

	/* LE */
	total_tests++;
	if (!uuid_le_to_bin(data, &le))
		test_uuid_failed("negative", true, false, data, NULL);

	/* BE */
	total_tests++;
	if (!uuid_be_to_bin(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");
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