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Subject[RFC PATCH 2/2] membarrier: selftest: Test private expedited cmd
Date
Test the new MEMBARRIER_CMD_PRIVATE_EXPEDITED and
MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED commands.

Add checks expecting specific error values on system calls expected to
fail.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Peter Zijlstra <peterz@infradead.org>
CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
CC: Boqun Feng <boqun.feng@gmail.com>
CC: Andrew Hunter <ahh@google.com>
CC: Maged Michael <maged.michael@gmail.com>
CC: gromer@google.com
CC: Avi Kivity <avi@scylladb.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Dave Watson <davejwatson@fb.com>
CC: Alan Stern <stern@rowland.harvard.edu>
CC: Will Deacon <will.deacon@arm.com>
CC: Andy Lutomirski <luto@kernel.org>
CC: linux-arch@vger.kernel.org
---
.../testing/selftests/membarrier/membarrier_test.c | 109 ++++++++++++++++++---
1 file changed, 94 insertions(+), 15 deletions(-)

diff --git a/tools/testing/selftests/membarrier/membarrier_test.c b/tools/testing/selftests/membarrier/membarrier_test.c
index 21399fcf1a59..f85657374b59 100644
--- a/tools/testing/selftests/membarrier/membarrier_test.c
+++ b/tools/testing/selftests/membarrier/membarrier_test.c
@@ -15,49 +15,119 @@ static int sys_membarrier(int cmd, int 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(
- "sys membarrier invalid command test: command = %d, flags = %d. Should fail, but passed\n",
- cmd, flags);
+ "%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(
- "sys membarrier invalid command test: command = %d, flags = %d. Failed as expected\n",
- cmd, flags);
+ "%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(
- "sys membarrier MEMBARRIER_CMD_QUERY invalid flags test: flags = %d. Should fail, but passed\n",
- flags);
+ "%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(
- "sys membarrier MEMBARRIER_CMD_QUERY invalid flags test: flags = %d. Failed as expected\n",
- flags);
+ "%s test: flags = %d, errno = %d. Failed as expected\n",
+ test_name, flags, errno);
return 0;
}

-static int test_membarrier_success(void)
+static int test_membarrier_shared_success(void)
{
int cmd = MEMBARRIER_CMD_SHARED, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_SHARED\n";
+ 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(
- "sys membarrier MEMBARRIER_CMD_SHARED test: flags = %d\n",
- flags);
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
}

ksft_test_result_pass(
- "sys membarrier MEMBARRIER_CMD_SHARED test: flags = %d\n",
- flags);
+ "%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;
}

@@ -71,7 +141,16 @@ static int test_membarrier(void)
status = test_membarrier_flags_fail();
if (status)
return status;
- status = test_membarrier_success();
+ 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;
--
2.11.0
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