Re: [PATCH bpf-next v2 2/3] selftests/bpf: Migrate test_xdp_redirect.sh to xdp_do_redirect.c

+static void ping_test(struct test_data *data)
+{
+	struct test_xdp_redirect *skel = NULL;
+	struct xdp_dummy *skel_dummy = NULL;
+	struct nstoken *nstoken = NULL;
+	int i, ret;
+
+	skel_dummy = xdp_dummy__open_and_load();
+	if (!ASSERT_OK_PTR(skel_dummy, "open and load xdp_dummy skeleton"))
+		goto close;
+
+	for (i = 1; i < NS_NB; i++) {
+		char ns_name[4] = {};
+
+		snprintf(ns_name, 4, "NS%d", i);
+		nstoken = open_netns(ns_name);
+		if (!ASSERT_OK_PTR(nstoken, "open ns"))
+			goto close;
+
+		ret = bpf_xdp_attach(if_nametoindex("veth0"),
+				     bpf_program__fd(skel_dummy->progs.xdp_dummy_prog),
+				     data->xdp_flags, NULL);
+		if (!ASSERT_GE(ret, 0, "bpf_xdp_attach dummy_prog"))
+			goto close;
+
+		close_netns(nstoken);
+		nstoken = NULL;
+	}
+
+	skel = test_xdp_redirect__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "open and load skeleton"))
+		goto close;
+
+	nstoken = open_netns(NS0);
+	if (!ASSERT_OK_PTR(nstoken, "open NS0"))
+		goto close;
+
+	ret = bpf_xdp_attach(VETH2_INDEX,
+			     bpf_program__fd(skel->progs.xdp_redirect_to_111),
+			     data->xdp_flags, NULL);
+	if (!ASSERT_GE(ret, 0, "bpf_xdp_attach"))
+		goto close;
+
+	ret = bpf_xdp_attach(VETH1_INDEX,
+			     bpf_program__fd(skel->progs.xdp_redirect_to_222),
+			     data->xdp_flags, NULL);
+	if (!ASSERT_GE(ret, 0, "bpf_xdp_attach"))
+		goto close;
+
+	close_netns(nstoken);
+	nstoken = NULL;
+
+	nstoken = open_netns(NS1);
+	if (!ASSERT_OK_PTR(nstoken, "open NS1"))
+		goto close;
+
+	SYS(close, "ping -c 1 %s.2", IPV4_NETWORK);