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// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <linux/membarrier.h>
#include <syscall.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "../kselftest.h"
static int sys_membarrier(int cmd, int flags)
{
return syscall(__NR_membarrier, cmd, flags);
}
static int test_membarrier_cmd_fail(void)
{
int cmd = -1, flags = 0;
const char *test_name = "sys membarrier invalid command";
if (sys_membarrier(cmd, flags) != -1) {
ksft_exit_fail_msg(
"%s test: command = %d, flags = %d. Should fail, but passed\n",
test_name, cmd, flags);
}
if (errno != EINVAL) {
ksft_exit_fail_msg(
"%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
test_name, flags, EINVAL, strerror(EINVAL),
errno, strerror(errno));
}
ksft_test_result_pass(
"%s test: command = %d, flags = %d, errno = %d. Failed as expected\n",
test_name, cmd, flags, errno);
return 0;
}
static int test_membarrier_flags_fail(void)
{
int cmd = MEMBARRIER_CMD_QUERY, flags = 1;
const char *test_name = "sys membarrier MEMBARRIER_CMD_QUERY invalid flags";
if (sys_membarrier(cmd, flags) != -1) {
ksft_exit_fail_msg(
"%s test: flags = %d. Should fail, but passed\n",
test_name, flags);
}
if (errno != EINVAL) {
ksft_exit_fail_msg(
"%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
test_name, flags, EINVAL, strerror(EINVAL),
errno, strerror(errno));
}
ksft_test_result_pass(
"%s test: flags = %d, errno = %d. Failed as expected\n",
test_name, flags, errno);
return 0;
}
static int test_membarrier_shared_success(void)
{
int cmd = MEMBARRIER_CMD_SHARED, flags = 0;
const char *test_name = "sys membarrier MEMBARRIER_CMD_SHARED";
if (sys_membarrier(cmd, flags) != 0) {
ksft_exit_fail_msg(
"%s test: flags = %d, errno = %d\n",
test_name, flags, errno);
}
ksft_test_result_pass(
"%s test: flags = %d\n", test_name, flags);
return 0;
}
static int test_membarrier_private_expedited_fail(void)
{
int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED not registered failure";
if (sys_membarrier(cmd, flags) != -1) {
ksft_exit_fail_msg(
"%s test: flags = %d. Should fail, but passed\n",
test_name, flags);
}
if (errno != EPERM) {
ksft_exit_fail_msg(
"%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
test_name, flags, EPERM, strerror(EPERM),
errno, strerror(errno));
}
ksft_test_result_pass(
"%s test: flags = %d, errno = %d\n",
test_name, flags, errno);
return 0;
}
static int test_membarrier_register_private_expedited_success(void)
{
int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED, flags = 0;
const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
if (sys_membarrier(cmd, flags) != 0) {
ksft_exit_fail_msg(
"%s test: flags = %d, errno = %d\n",
test_name, flags, errno);
}
ksft_test_result_pass(
"%s test: flags = %d\n",
test_name, flags);
return 0;
}
static int test_membarrier_private_expedited_success(void)
{
int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED";
if (sys_membarrier(cmd, flags) != 0) {
ksft_exit_fail_msg(
"%s test: flags = %d, errno = %d\n",
test_name, flags, errno);
}
ksft_test_result_pass(
"%s test: flags = %d\n",
test_name, flags);
return 0;
}
static int test_membarrier(void)
{
int status;
status = test_membarrier_cmd_fail();
if (status)
return status;
status = test_membarrier_flags_fail();
if (status)
return status;
status = test_membarrier_shared_success();
if (status)
return status;
status = test_membarrier_private_expedited_fail();
if (status)
return status;
status = test_membarrier_register_private_expedited_success();
if (status)
return status;
status = test_membarrier_private_expedited_success();
if (status)
return status;
return 0;
}
static int test_membarrier_query(void)
{
int flags = 0, ret;
ret = sys_membarrier(MEMBARRIER_CMD_QUERY, flags);
if (ret < 0) {
if (errno == ENOSYS) {
/*
* It is valid to build a kernel with
* CONFIG_MEMBARRIER=n. However, this skips the tests.
*/
ksft_exit_skip(
"sys membarrier (CONFIG_MEMBARRIER) is disabled.\n");
}
ksft_exit_fail_msg("sys_membarrier() failed\n");
}
if (!(ret & MEMBARRIER_CMD_SHARED))
ksft_exit_fail_msg("sys_membarrier is not supported.\n");
ksft_test_result_pass("sys_membarrier available\n");
return 0;
}
int main(int argc, char **argv)
{
ksft_print_header();
test_membarrier_query();
test_membarrier();
return ksft_exit_pass();
}
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