// SPDX-License-Identifier: GPL-2.0 #include <vmlinux.h> #include <bpf/bpf_helpers.h> struct { __uint(type, BPF_MAP_TYPE_PROG_ARRAY); __uint(max_entries, 1); __uint(key_size, sizeof(__u32)); __uint(value_size, sizeof(__u32)); } prog_array SEC(".maps"); SEC("cgroup_skb/egress") int caller_prog(struct __sk_buff *skb) { bpf_tail_call(skb, &prog_array, 0); return 1; } SEC("cgroup_skb/egress") int leaf_prog(struct __sk_buff *skb) { return 1; } char _license[] SEC("license") = "GPL";