NUM_CGROUP_LEVELS 11 tools/testing/selftests/bpf/progs/test_skb_cgroup_id_kern.c #define NUM_CGROUP_LEVELS 4 NUM_CGROUP_LEVELS 22 tools/testing/selftests/bpf/test_skb_cgroup_id_user.c #define NUM_CGROUP_LEVELS 4