[for-linus][PATCH 3/3] selftests/user_events: Add test cases when event is disabled

Steven Rostedt
2023-06-28T14:05:54Z

When user_events are disabled, it's write operation should return -EBADF.
Add this test cases.

Link: https://lkml.kernel.org/r/20230626111344.19136-4-sunliming@kylinos.cn

Acked-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: sunliming <sunliming@kylinos.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
tools/testing/selftests/user_events/ftrace_test.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/user_events/ftrace_test.c b/tools/testing/selftests/user_events/ftrace_test.c
index 88898749e5b7..5beb0aef1d81 100644
--- a/tools/testing/selftests/user_events/ftrace_test.c
+++ b/tools/testing/selftests/user_events/ftrace_test.c
@@ -324,6 +324,10 @@ TEST_F(user, write_events) {
io[0].iov_base = &reg.write_index;
io[0].iov_len = sizeof(reg.write_index);

+ /* Write should return -EBADF when event is not enabled */
+ ASSERT_EQ(-1, writev(self->data_fd, (const struct iovec *)io, 3));
+ ASSERT_EQ(EBADF, errno);
+
/* Enable event */
self->enable_fd = open(enable_file, O_RDWR);
ASSERT_NE(-1, write(self->enable_fd, "1", sizeof("1")))
--
2.39.2