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