[mirror_ubuntu-zesty-kernel.git] / tools / testing / selftests / membarrier / membarrier_test.c

#define _GNU_SOURCE
#include <linux/membarrier.h>
#include <syscall.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

#include "../kselftest.h"

enum test_membarrier_status {
	TEST_MEMBARRIER_PASS = 0,
	TEST_MEMBARRIER_FAIL,
	TEST_MEMBARRIER_SKIP,
};

static int sys_membarrier(int cmd, int flags)
{
	return syscall(__NR_membarrier, cmd, flags);
}

static enum test_membarrier_status test_membarrier_cmd_fail(void)
{
	int cmd = -1, flags = 0;

	if (sys_membarrier(cmd, flags) != -1) {
		printf("membarrier: Wrong command should fail but passed.\n");
		return TEST_MEMBARRIER_FAIL;
	}
	return TEST_MEMBARRIER_PASS;
}

static enum test_membarrier_status test_membarrier_flags_fail(void)
{
	int cmd = MEMBARRIER_CMD_QUERY, flags = 1;

	if (sys_membarrier(cmd, flags) != -1) {
		printf("membarrier: Wrong flags should fail but passed.\n");
		return TEST_MEMBARRIER_FAIL;
	}
	return TEST_MEMBARRIER_PASS;
}

static enum test_membarrier_status test_membarrier_success(void)
{
	int cmd = MEMBARRIER_CMD_SHARED, flags = 0;

	if (sys_membarrier(cmd, flags) != 0) {
		printf("membarrier: Executing MEMBARRIER_CMD_SHARED failed. %s.\n",
				strerror(errno));
		return TEST_MEMBARRIER_FAIL;
	}

	printf("membarrier: MEMBARRIER_CMD_SHARED success.\n");
	return TEST_MEMBARRIER_PASS;
}

static enum test_membarrier_status test_membarrier(void)
{
	enum test_membarrier_status status;

	status = test_membarrier_cmd_fail();
	if (status)
		return status;
	status = test_membarrier_flags_fail();
	if (status)
		return status;
	status = test_membarrier_success();
	if (status)
		return status;
	return TEST_MEMBARRIER_PASS;
}

static enum test_membarrier_status test_membarrier_query(void)
{
	int flags = 0, ret;

	printf("membarrier MEMBARRIER_CMD_QUERY ");
	ret = sys_membarrier(MEMBARRIER_CMD_QUERY, flags);
	if (ret < 0) {
		printf("failed. %s.\n", strerror(errno));
		switch (errno) {
		case ENOSYS:
			/*
			 * It is valid to build a kernel with
			 * CONFIG_MEMBARRIER=n. However, this skips the tests.
			 */
			return TEST_MEMBARRIER_SKIP;
		case EINVAL:
		default:
			return TEST_MEMBARRIER_FAIL;
		}
	}
	if (!(ret & MEMBARRIER_CMD_SHARED)) {
		printf("command MEMBARRIER_CMD_SHARED is not supported.\n");
		return TEST_MEMBARRIER_FAIL;
	}
	printf("syscall available.\n");
	return TEST_MEMBARRIER_PASS;
}

int main(int argc, char **argv)
{
	switch (test_membarrier_query()) {
	case TEST_MEMBARRIER_FAIL:
		return ksft_exit_fail();
	case TEST_MEMBARRIER_SKIP:
		return ksft_exit_skip();
	}
	switch (test_membarrier()) {
	case TEST_MEMBARRIER_FAIL:
		return ksft_exit_fail();
	case TEST_MEMBARRIER_SKIP:
		return ksft_exit_skip();
	}

	printf("membarrier: tests done!\n");
	return ksft_exit_pass();
}
Commit	Line	Data
b6d97344	1	#define _GNU_SOURCE
b6d97344	2	#include <linux/membarrier.h>
7a07b503	3	#include <syscall.h>
b6d97344 PK	4	#include <stdio.h>
	5	#include <errno.h>
	6	#include <string.h>
	7
	8	#include "../kselftest.h"
	9
c9946c42 MD	10	enum test_membarrier_status {
	11	TEST_MEMBARRIER_PASS = 0,
	12	TEST_MEMBARRIER_FAIL,
	13	TEST_MEMBARRIER_SKIP,
	14	};
	15
b6d97344 PK	16	static int sys_membarrier(int cmd, int flags)
	17	{
	18	return syscall(__NR_membarrier, cmd, flags);
	19	}
	20
c9946c42	21	static enum test_membarrier_status test_membarrier_cmd_fail(void)
b6d97344 PK	22	{
	23	int cmd = -1, flags = 0;
	24
	25	if (sys_membarrier(cmd, flags) != -1) {
c9946c42 MD	26	printf("membarrier: Wrong command should fail but passed.\n");
	27	return TEST_MEMBARRIER_FAIL;
	28	}
	29	return TEST_MEMBARRIER_PASS;
	30	}
	31
	32	static enum test_membarrier_status test_membarrier_flags_fail(void)
	33	{
	34	int cmd = MEMBARRIER_CMD_QUERY, flags = 1;
	35
	36	if (sys_membarrier(cmd, flags) != -1) {
	37	printf("membarrier: Wrong flags should fail but passed.\n");
	38	return TEST_MEMBARRIER_FAIL;
b6d97344	39	}
c9946c42	40	return TEST_MEMBARRIER_PASS;
b6d97344 PK	41	}
b6d97344 PK	42
c9946c42	43	static enum test_membarrier_status test_membarrier_success(void)
b6d97344	44	{
c9946c42	45	int cmd = MEMBARRIER_CMD_SHARED, flags = 0;
b6d97344	46
c9946c42 MD	47	if (sys_membarrier(cmd, flags) != 0) {
c9946c42 MD	48	printf("membarrier: Executing MEMBARRIER_CMD_SHARED failed. %s.\n",
b6d97344	49	strerror(errno));
c9946c42	50	return TEST_MEMBARRIER_FAIL;
b6d97344 PK	51	}
b6d97344 PK	52
c9946c42 MD	53	printf("membarrier: MEMBARRIER_CMD_SHARED success.\n");
c9946c42 MD	54	return TEST_MEMBARRIER_PASS;
b6d97344 PK	55	}
b6d97344 PK	56
c9946c42	57	static enum test_membarrier_status test_membarrier(void)
b6d97344	58	{
c9946c42 MD	59	enum test_membarrier_status status;
	60
	61	status = test_membarrier_cmd_fail();
	62	if (status)
	63	return status;
	64	status = test_membarrier_flags_fail();
	65	if (status)
	66	return status;
	67	status = test_membarrier_success();
	68	if (status)
	69	return status;
	70	return TEST_MEMBARRIER_PASS;
b6d97344 PK	71	}
b6d97344 PK	72
c9946c42	73	static enum test_membarrier_status test_membarrier_query(void)
b6d97344	74	{
c9946c42	75	int flags = 0, ret;
b6d97344	76
c9946c42 MD	77	printf("membarrier MEMBARRIER_CMD_QUERY ");
	78	ret = sys_membarrier(MEMBARRIER_CMD_QUERY, flags);
	79	if (ret < 0) {
	80	printf("failed. %s.\n", strerror(errno));
	81	switch (errno) {
	82	case ENOSYS:
	83	/*
	84	* It is valid to build a kernel with
	85	* CONFIG_MEMBARRIER=n. However, this skips the tests.
	86	*/
	87	return TEST_MEMBARRIER_SKIP;
	88	case EINVAL:
	89	default:
	90	return TEST_MEMBARRIER_FAIL;
	91	}
	92	}
	93	if (!(ret & MEMBARRIER_CMD_SHARED)) {
	94	printf("command MEMBARRIER_CMD_SHARED is not supported.\n");
	95	return TEST_MEMBARRIER_FAIL;
	96	}
	97	printf("syscall available.\n");
	98	return TEST_MEMBARRIER_PASS;
b6d97344 PK	99	}
	100
	101	int main(int argc, char **argv)
	102	{
c9946c42 MD	103	switch (test_membarrier_query()) {
c9946c42 MD	104	case TEST_MEMBARRIER_FAIL:
b6d97344	105	return ksft_exit_fail();
c9946c42 MD	106	case TEST_MEMBARRIER_SKIP:
	107	return ksft_exit_skip();
	108	}
	109	switch (test_membarrier()) {
	110	case TEST_MEMBARRIER_FAIL:
	111	return ksft_exit_fail();
	112	case TEST_MEMBARRIER_SKIP:
	113	return ksft_exit_skip();
b6d97344 PK	114	}
	115
	116	printf("membarrier: tests done!\n");
b6d97344 PK	117	return ksft_exit_pass();
b6d97344 PK	118	}