1 files changed, 102 insertions, 0 deletions

diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c
index f97d56337d8a..40aedd1d9dc5 100644
--- a/tools/testing/selftests/hid/hid_bpf.c
+++ b/tools/testing/selftests/hid/hid_bpf.c
@@ -1029,6 +1029,108 @@ TEST_F(hid_bpf, test_hid_infinite_loop_raw_request_call)
 }
 
 /*
+ * Call hid_hw_output_report against the given uhid device,
+ * check that the program is called and prevents the
+ * call to uhid.
+ */
+TEST_F(hid_bpf, test_hid_filter_output_report_call)
+{
+	const struct test_program progs[] = {
+		{ .name = "hid_test_filter_output_report" },
+	};
+	__u8 buf[10] = {0};
+	int err;
+
+	LOAD_PROGRAMS(progs);
+
+	/* first check that we did not attach to device_event */
+
+	/* inject one event */
+	buf[0] = 1;
+	buf[1] = 42;
+	uhid_send_event(_metadata, self->uhid_fd, buf, 6);
+
+	/* read the data from hidraw */
+	memset(buf, 0, sizeof(buf));
+	err = read(self->hidraw_fd, buf, sizeof(buf));
+	ASSERT_EQ(err, 6) TH_LOG("read_hidraw");
+	ASSERT_EQ(buf[0], 1);
+	ASSERT_EQ(buf[1], 42);
+	ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test");
+
+	/* now check that our program is preventing hid_hw_output_report() */
+
+	buf[0] = 1; /* report ID */
+	buf[1] = 2;
+	buf[2] = 42;
+
+	err = write(self->hidraw_fd, buf, 3);
+	ASSERT_LT(err, 0) TH_LOG("unexpected success while sending hid_hw_output_report: %d", err);
+	ASSERT_EQ(errno, 25) TH_LOG("unexpected error code while sending hid_hw_output_report: %d",
+				    errno);
+
+	/* remove our bpf program and check that we can now emit commands */
+
+	/* detach the program */
+	detach_bpf(self);
+
+	self->hidraw_fd = open_hidraw(self->dev_id);
+	ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw");
+
+	err = write(self->hidraw_fd, buf, 3);
+	ASSERT_GE(err, 0) TH_LOG("error while sending hid_hw_output_report: %d", err);
+}
+
+/*
+ * Call hid_hw_output_report against the given uhid device,
+ * check that the program is called and can issue the call
+ * to uhid and transform the answer.
+ */
+TEST_F(hid_bpf, test_hid_change_output_report_call)
+{
+	const struct test_program progs[] = {
+		{ .name = "hid_test_hidraw_output_report" },
+	};
+	__u8 buf[10] = {0};
+	int err;
+
+	LOAD_PROGRAMS(progs);
+
+	/* emit hid_hw_output_report from hidraw */
+	buf[0] = 1; /* report ID */
+	buf[1] = 2;
+	buf[2] = 42;
+
+	err = write(self->hidraw_fd, buf, 10);
+	ASSERT_EQ(err, 2) TH_LOG("unexpected returned size while sending hid_hw_output_report: %d",
+				 err);
+}
+
+/*
+ * Call hid_hw_output_report against the given uhid device,
+ * check that the program is not making infinite loops.
+ */
+TEST_F(hid_bpf, test_hid_infinite_loop_output_report_call)
+{
+	const struct test_program progs[] = {
+		{ .name = "hid_test_infinite_loop_output_report" },
+	};
+	__u8 buf[10] = {0};
+	int err;
+
+	LOAD_PROGRAMS(progs);
+
+	/* emit hid_hw_output_report from hidraw */
+	buf[0] = 1; /* report ID */
+	buf[1] = 2;
+	buf[2] = 42;
+
+	err = write(self->hidraw_fd, buf, 8);
+	ASSERT_EQ(err, 2) TH_LOG("unexpected returned size while sending hid_hw_output_report: %d",
+				 err);
+}
+
+/*
  * Attach hid_insert{0,1,2} to the given uhid device,
  * retrieve and open the matching hidraw node,
  * inject one event in the uhid device,