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selftests: enhance membarrier syscall test 

Update the membarrier syscall self-test to match the membarrier
interface.  Extend coverage of the interface.  Consider ENOSYS as a
"SKIP" test, since it is a valid configuration, but does not allow
testing the system call.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Pranith Kumar <bobby.prani@gmail.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mathieu Desnoyers 2015-09-11 13:07:45 -07:00 committed by Linus Torvalds
parent b6d9734416
commit c9946c4208
1 changed files with 75 additions and 25 deletions
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100
tools/testing/selftests/membarrier/membarrier_test.c
View File

@ -10,62 +10,112 @@
#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 void test_membarrier_fail(void)
static enum test_membarrier_status test_membarrier_cmd_fail(void)
{
int cmd = -1, flags = 0;
if (sys_membarrier(cmd, flags) != -1) {
printf("membarrier: Should fail but passed\n");
ksft_exit_fail();
printf("membarrier: Wrong command should fail but passed.\n");
return TEST_MEMBARRIER_FAIL;
}
return TEST_MEMBARRIER_PASS;
}
static void test_membarrier_success(void)
static enum test_membarrier_status test_membarrier_flags_fail(void)
{
int flags = 0;
int cmd = MEMBARRIER_CMD_QUERY, flags = 1;
if (sys_membarrier(MEMBARRIER_CMD_SHARED, flags) != 0) {
printf("membarrier: Executing MEMBARRIER failed, %s\n",
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));
ksft_exit_fail();
return TEST_MEMBARRIER_FAIL;
}
printf("membarrier: MEMBARRIER_CMD_SHARED success\n");
printf("membarrier: MEMBARRIER_CMD_SHARED success.\n");
return TEST_MEMBARRIER_PASS;
}
static void test_membarrier(void)
static enum test_membarrier_status test_membarrier(void)
{
test_membarrier_fail();
test_membarrier_success();
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 int test_membarrier_exists(void)
static enum test_membarrier_status test_membarrier_query(void)
{
int flags = 0;
int flags = 0, ret;
if (sys_membarrier(MEMBARRIER_CMD_QUERY, flags))
return 0;
return 1;
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)
{
printf("membarrier: MEMBARRIER_CMD_QUERY ");
if (test_membarrier_exists()) {
printf("syscall implemented\n");
test_membarrier();
} else {
printf("syscall not implemented!\n");
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();
}