// 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"); int count, which; SEC("tc") int classifier_0(struct __sk_buff *skb) { count++; if (__builtin_constant_p(which)) __bpf_unreachable(); bpf_tail_call(skb, &jmp_table, which); return 1; } SEC("tc") int entry(struct __sk_buff *skb) { if (__builtin_constant_p(which)) __bpf_unreachable(); bpf_tail_call(skb, &jmp_table, which); return 0; } char __license[] SEC("license") = "GPL";