selftests/bpf: Monitor traffic for sockmap_listen.

Enable traffic monitor for each subtest of sockmap_listen.

Acked-by: Stanislav Fomichev <[email protected]>
Signed-off-by: Kui-Feng Lee <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin KaFai Lau <[email protected]>

Author: ThinkerYzu1

tools/testing/selftests/bpf/prog_tests/sockmap_listen.c

@@ -1925,15 +1925,23 @@ static void test_udp_unix_redir(struct test_sockmap_listen *skel, struct bpf_map
 				int family)
 {
 	const char *family_name, *map_name;
+	struct netns_obj *netns;
 	char s[MAX_TEST_NAME];
 
 	family_name = family_str(family);
 	map_name = map_type_str(map);
 	snprintf(s, sizeof(s), "%s %s %s", map_name, family_name, __func__);
 	if (!test__start_subtest(s))
 		return;
+
+	netns = netns_new("sockmap_listen", true);
+	if (!ASSERT_OK_PTR(netns, "netns_new"))
+		return;
+
 	inet_unix_skb_redir_to_connected(skel, map, family);
 	unix_inet_skb_redir_to_connected(skel, map, family);
+
+	netns_free(netns);
 }
 
 static void run_tests(struct test_sockmap_listen *skel, struct bpf_map *map,