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1// SPDX-License-Identifier: GPL-2.02#include <linux/bpf.h>3 4#include <bpf/bpf_helpers.h>5 6struct {7 __uint(type, BPF_MAP_TYPE_PROG_ARRAY);8 __uint(max_entries, 1);9 __uint(key_size, sizeof(__u32));10 __uint(value_size, sizeof(__u32));11} jmp_table SEC(".maps");12 13int count, which;14 15SEC("tc")16int classifier_0(struct __sk_buff *skb)17{18 count++;19 if (__builtin_constant_p(which))20 __bpf_unreachable();21 bpf_tail_call(skb, &jmp_table, which);22 return 1;23}24 25SEC("tc")26int entry(struct __sk_buff *skb)27{28 if (__builtin_constant_p(which))29 __bpf_unreachable();30 bpf_tail_call(skb, &jmp_table, which);31 return 0;32}33 34char __license[] SEC("license") = "GPL";35