selftests/bpf: Test for get_netns_cookie

Add test to use get_netns_cookie() from BPF_PROG_TYPE_SK_MSG.

Signed-off-by: Xu Liu <liuxu623@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210820071712.52852-3-liuxu623@gmail.com

1 files changed, 38 insertions, 19 deletions

diff --git a/tools/testing/selftests/bpf/prog_tests/netns_cookie.c b/tools/testing/selftests/bpf/prog_tests/netns_cookie.c
index 6f3cd472fb65..71d8f3ba7d6b 100644
--- a/tools/testing/selftests/bpf/prog_tests/netns_cookie.c
+++ b/tools/testing/selftests/bpf/prog_tests/netns_cookie.c
@@ -12,10 +12,12 @@ static int duration;
 
 void test_netns_cookie(void)
 {
-	int server_fd = 0, client_fd = 0, cgroup_fd = 0, err = 0, val = 0;
+	int server_fd = -1, client_fd = -1, cgroup_fd = -1;
+	int err, val, ret, map, verdict;
 	struct netns_cookie_prog *skel;
 	uint64_t cookie_expected_value;
 	socklen_t vallen = sizeof(cookie_expected_value);
+	static const char send_msg[] = "message";
 
 	skel = netns_cookie_prog__open_and_load();
 	if (!ASSERT_OK_PTR(skel, "skel_open"))
@@ -23,39 +25,56 @@ void test_netns_cookie(void)
 
 	cgroup_fd = test__join_cgroup("/netns_cookie");
 	if (CHECK(cgroup_fd < 0, "join_cgroup", "cgroup creation failed\n"))
-		goto out;
+		goto done;
 
 	skel->links.get_netns_cookie_sockops = bpf_program__attach_cgroup(
 		skel->progs.get_netns_cookie_sockops, cgroup_fd);
 	if (!ASSERT_OK_PTR(skel->links.get_netns_cookie_sockops, "prog_attach"))
-		goto close_cgroup_fd;
+		goto done;
+
+	verdict = bpf_program__fd(skel->progs.get_netns_cookie_sk_msg);
+	map = bpf_map__fd(skel->maps.sock_map);
+	err = bpf_prog_attach(verdict, map, BPF_SK_MSG_VERDICT, 0);
+	if (!ASSERT_OK(err, "prog_attach"))
+		goto done;
 
 	server_fd = start_server(AF_INET6, SOCK_STREAM, "::1", 0, 0);
 	if (CHECK(server_fd < 0, "start_server", "errno %d\n", errno))
-		goto close_cgroup_fd;
+		goto done;
 
 	client_fd = connect_to_fd(server_fd, 0);
 	if (CHECK(client_fd < 0, "connect_to_fd", "errno %d\n", errno))
-		goto close_server_fd;
+		goto done;
+
+	ret = send(client_fd, send_msg, sizeof(send_msg), 0);
+	if (CHECK(ret != sizeof(send_msg), "send(msg)", "ret:%d\n", ret))
+		goto done;
 
-	err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.netns_cookies),
-				&client_fd, &val);
-	if (!ASSERT_OK(err, "map_lookup(socket_cookies)"))
-		goto close_client_fd;
+	err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.sockops_netns_cookies),
+				  &client_fd, &val);
+	if (!ASSERT_OK(err, "map_lookup(sockops_netns_cookies)"))
+		goto done;
 
 	err = getsockopt(client_fd, SOL_SOCKET, SO_NETNS_COOKIE,
-				&cookie_expected_value, &vallen);
-	if (!ASSERT_OK(err, "getsockopt)"))
-		goto close_client_fd;
+			 &cookie_expected_value, &vallen);
+	if (!ASSERT_OK(err, "getsockopt"))
+		goto done;
+
+	ASSERT_EQ(val, cookie_expected_value, "cookie_value");
+
+	err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.sk_msg_netns_cookies),
+				  &client_fd, &val);
+	if (!ASSERT_OK(err, "map_lookup(sk_msg_netns_cookies)"))
+		goto done;
 
 	ASSERT_EQ(val, cookie_expected_value, "cookie_value");
 
-close_client_fd:
-	close(client_fd);
-close_server_fd:
-	close(server_fd);
-close_cgroup_fd:
-	close(cgroup_fd);
-out:
+done:
+	if (server_fd != -1)
+		close(server_fd);
+	if (client_fd != -1)
+		close(client_fd);
+	if (cgroup_fd != -1)
+		close(cgroup_fd);
 	netns_cookie_prog__destroy(skel);
 }