selftests/user_events: Clear the events after perf self-test

When the self test is completed, perf self-test left the user events not to
be cleared. Clear the events by unregister and delete the event.

Link: https://lkml.kernel.org/r/20230606062027.1008398-4-sunliming@kylinos.cn
Acked-by: Beau Belgrave <beaub@linux.microsoft.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: sunliming <sunliming@kylinos.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

diff --git a/tools/testing/selftests/user_events/perf_test.c b/tools/testing/selftests/user_events/perf_test.c
index a070258d4449e6f1be49d753ac79dce83a8bd248..e97f24ab6e2f97dc803b2af76df487ea242d3c8d 100644 (file)
--- a/tools/testing/selftests/user_events/perf_test.c
+++ b/tools/testing/selftests/user_events/perf_test.c
@@ -81,6 +81,32 @@ static int get_offset(void)
        return offset;
 }
 
+static int clear(int *check)
+{
+       struct user_unreg unreg = {0};
+
+       unreg.size = sizeof(unreg);
+       unreg.disable_bit = 31;
+       unreg.disable_addr = (__u64)check;
+
+       int fd = open(data_file, O_RDWR);
+
+       if (fd == -1)
+               return -1;
+
+       if (ioctl(fd, DIAG_IOCSUNREG, &unreg) == -1)
+               if (errno != ENOENT)
+                       return -1;
+
+       if (ioctl(fd, DIAG_IOCSDEL, "__test_event") == -1)
+               if (errno != ENOENT)
+                       return -1;
+
+       close(fd);
+
+       return 0;
+}
+
 FIXTURE(user) {
        int data_fd;
        int check;
@@ -93,6 +119,9 @@ FIXTURE_SETUP(user) {
 
 FIXTURE_TEARDOWN(user) {
        close(self->data_fd);
+
+       if (clear(&self->check) != 0)
+               printf("WARNING: Clear didn't work!\n");
 }
 
 TEST_F(user, perf_write) {