make_netns
int make_netns(const char *name);
err = make_netns(TEST_NS);
err = make_netns("sk_bypass_prot_mem");
if (!ASSERT_OK(make_netns(CLIENT_NS), "create client ns"))
if (!ASSERT_OK(make_netns(SERVER_NS), "create server ns"))
if (!ASSERT_OK(make_netns(CLIENT_NS), "create client ns") ||
!ASSERT_OK(make_netns(SERVER_NS), "create server ns"))
r = make_netns(nsname);