1 files changed, 55 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/timer.c b/tools/testing/selftests/bpf/prog_tests/timer.c
new file mode 100644
index 000000000000..7eb049214859
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/timer.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2021 Facebook */
+#include <test_progs.h>
+#include "timer.skel.h"
+
+static int timer(struct timer *timer_skel)
+{
+	int err, prog_fd;
+	LIBBPF_OPTS(bpf_test_run_opts, topts);
+
+	err = timer__attach(timer_skel);
+	if (!ASSERT_OK(err, "timer_attach"))
+		return err;
+
+	ASSERT_EQ(timer_skel->data->callback_check, 52, "callback_check1");
+	ASSERT_EQ(timer_skel->data->callback2_check, 52, "callback2_check1");
+
+	prog_fd = bpf_program__fd(timer_skel->progs.test1);
+	err = bpf_prog_test_run_opts(prog_fd, &topts);
+	ASSERT_OK(err, "test_run");
+	ASSERT_EQ(topts.retval, 0, "test_run");
+	timer__detach(timer_skel);
+
+	usleep(50); /* 10 usecs should be enough, but give it extra */
+	/* check that timer_cb1() was executed 10+10 times */
+	ASSERT_EQ(timer_skel->data->callback_check, 42, "callback_check2");
+	ASSERT_EQ(timer_skel->data->callback2_check, 42, "callback2_check2");
+
+	/* check that timer_cb2() was executed twice */
+	ASSERT_EQ(timer_skel->bss->bss_data, 10, "bss_data");
+
+	/* check that there were no errors in timer execution */
+	ASSERT_EQ(timer_skel->bss->err, 0, "err");
+
+	/* check that code paths completed */
+	ASSERT_EQ(timer_skel->bss->ok, 1 | 2 | 4, "ok");
+
+	return 0;
+}
+
+/* TODO: use pid filtering */
+void serial_test_timer(void)
+{
+	struct timer *timer_skel = NULL;
+	int err;
+
+	timer_skel = timer__open_and_load();
+	if (!ASSERT_OK_PTR(timer_skel, "timer_skel_load"))
+		goto cleanup;
+
+	err = timer(timer_skel);
+	ASSERT_OK(err, "timer");
+cleanup:
+	timer__destroy(timer_skel);
+}