119 lines
2.6 KiB
C
119 lines
2.6 KiB
C
#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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enum test_membarrier_status {
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TEST_MEMBARRIER_PASS = 0,
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TEST_MEMBARRIER_FAIL,
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TEST_MEMBARRIER_SKIP,
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};
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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 enum test_membarrier_status 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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printf("membarrier: Wrong command should fail but passed.\n");
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return TEST_MEMBARRIER_FAIL;
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}
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return TEST_MEMBARRIER_PASS;
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}
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static enum test_membarrier_status 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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printf("membarrier: Wrong flags should fail but passed.\n");
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return TEST_MEMBARRIER_FAIL;
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}
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return TEST_MEMBARRIER_PASS;
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}
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static enum test_membarrier_status test_membarrier_success(void)
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{
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int cmd = MEMBARRIER_CMD_SHARED, flags = 0;
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if (sys_membarrier(cmd, flags) != 0) {
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printf("membarrier: Executing MEMBARRIER_CMD_SHARED failed. %s.\n",
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strerror(errno));
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return TEST_MEMBARRIER_FAIL;
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}
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printf("membarrier: MEMBARRIER_CMD_SHARED success.\n");
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return TEST_MEMBARRIER_PASS;
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}
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static enum test_membarrier_status test_membarrier(void)
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{
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enum test_membarrier_status 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 TEST_MEMBARRIER_PASS;
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}
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static enum test_membarrier_status test_membarrier_query(void)
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{
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int flags = 0, ret;
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printf("membarrier MEMBARRIER_CMD_QUERY ");
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ret = sys_membarrier(MEMBARRIER_CMD_QUERY, flags);
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if (ret < 0) {
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printf("failed. %s.\n", strerror(errno));
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switch (errno) {
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case 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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return TEST_MEMBARRIER_SKIP;
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case EINVAL:
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default:
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return TEST_MEMBARRIER_FAIL;
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}
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}
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if (!(ret & MEMBARRIER_CMD_SHARED)) {
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printf("command MEMBARRIER_CMD_SHARED is not supported.\n");
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return TEST_MEMBARRIER_FAIL;
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}
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printf("syscall available.\n");
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return TEST_MEMBARRIER_PASS;
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}
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int main(int argc, char **argv)
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{
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switch (test_membarrier_query()) {
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case TEST_MEMBARRIER_FAIL:
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return ksft_exit_fail();
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case TEST_MEMBARRIER_SKIP:
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return ksft_exit_skip();
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}
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switch (test_membarrier()) {
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case TEST_MEMBARRIER_FAIL:
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return ksft_exit_fail();
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case TEST_MEMBARRIER_SKIP:
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return ksft_exit_skip();
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}
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printf("membarrier: tests done!\n");
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return ksft_exit_pass();
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}
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