// SPDX-License-Identifier: GPL-2.0 #include <linux/bpf.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)); } jmp_table SEC(".maps"); static volatile int count; SEC("classifier/0") int bpf_func_0(struct __sk_buff *skb) { count++; bpf_tail_call(skb, &jmp_table, 0); return 1; } SEC("classifier") int entry(struct __sk_buff *skb) { bpf_tail_call(skb, &jmp_table, 0); return 0; } char __license[] SEC("license") = "GPL"; int _version SEC("version") = 1;