static void tb_test_tunnel_dp_max_length()

in test.c [1465:1543]

• 50 lines of code
• 1 McCabe index (conditional complexity)

static void tb_test_tunnel_dp_max_length(struct kunit *test)
{
	struct tb_switch *host, *dev1, *dev2, *dev3, *dev4, *dev5, *dev6;
	struct tb_switch *dev7, *dev8, *dev9, *dev10, *dev11, *dev12;
	struct tb_port *in, *out;
	struct tb_tunnel *tunnel;

	/*
	 * Creates DP tunnel from Device #6 to Device #12.
	 *
	 *          [Host]
	 *         1 /  \ 3
	 *        1 /    \ 1
	 * [Device #1]   [Device #7]
	 *     3 |           | 3
	 *     1 |           | 1
	 * [Device #2]   [Device #8]
	 *     3 |           | 3
	 *     1 |           | 1
	 * [Device #3]   [Device #9]
	 *     3 |           | 3
	 *     1 |           | 1
	 * [Device #4]   [Device #10]
	 *     3 |           | 3
	 *     1 |           | 1
	 * [Device #5]   [Device #11]
	 *     3 |           | 3
	 *     1 |           | 1
	 * [Device #6]   [Device #12]
	 */
	host = alloc_host(test);
	dev1 = alloc_dev_default(test, host, 0x1, true);
	dev2 = alloc_dev_default(test, dev1, 0x301, true);
	dev3 = alloc_dev_default(test, dev2, 0x30301, true);
	dev4 = alloc_dev_default(test, dev3, 0x3030301, true);
	dev5 = alloc_dev_default(test, dev4, 0x303030301, true);
	dev6 = alloc_dev_with_dpin(test, dev5, 0x30303030301, true);
	dev7 = alloc_dev_default(test, host, 0x3, true);
	dev8 = alloc_dev_default(test, dev7, 0x303, true);
	dev9 = alloc_dev_default(test, dev8, 0x30303, true);
	dev10 = alloc_dev_default(test, dev9, 0x3030303, true);
	dev11 = alloc_dev_default(test, dev10, 0x303030303, true);
	dev12 = alloc_dev_default(test, dev11, 0x30303030303, true);

	in = &dev6->ports[13];
	out = &dev12->ports[13];

	tunnel = tb_tunnel_alloc_dp(NULL, in, out, 0, 0);
	KUNIT_ASSERT_TRUE(test, tunnel != NULL);
	KUNIT_EXPECT_EQ(test, tunnel->type, TB_TUNNEL_DP);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->src_port, in);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->dst_port, out);
	KUNIT_ASSERT_EQ(test, tunnel->npaths, 3);
	KUNIT_ASSERT_EQ(test, tunnel->paths[0]->path_length, 13);
	/* First hop */
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].in_port, in);
	/* Middle */
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[6].in_port,
			    &host->ports[1]);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[6].out_port,
			    &host->ports[3]);
	/* Last */
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[12].out_port, out);
	KUNIT_ASSERT_EQ(test, tunnel->paths[1]->path_length, 13);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[0].in_port, in);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[6].in_port,
			    &host->ports[1]);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[6].out_port,
			    &host->ports[3]);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[12].out_port, out);
	KUNIT_ASSERT_EQ(test, tunnel->paths[2]->path_length, 13);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[0].in_port, out);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[6].in_port,
			    &host->ports[3]);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[6].out_port,
			    &host->ports[1]);
	KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[12].out_port, in);
	tb_tunnel_free(tunnel);
}