162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci#include <linux/bpf.h> 362306a36Sopenharmony_ci#include <bpf/bpf_helpers.h> 462306a36Sopenharmony_ci#include "bpf_legacy.h" 562306a36Sopenharmony_ci 662306a36Sopenharmony_cistruct { 762306a36Sopenharmony_ci __uint(type, BPF_MAP_TYPE_PROG_ARRAY); 862306a36Sopenharmony_ci __uint(max_entries, 1); 962306a36Sopenharmony_ci __uint(key_size, sizeof(__u32)); 1062306a36Sopenharmony_ci __uint(value_size, sizeof(__u32)); 1162306a36Sopenharmony_ci} jmp_table SEC(".maps"); 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_cistatic __noinline 1462306a36Sopenharmony_ciint subprog_tail(struct __sk_buff *skb) 1562306a36Sopenharmony_ci{ 1662306a36Sopenharmony_ci if (load_byte(skb, 0)) 1762306a36Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 1); 1862306a36Sopenharmony_ci else 1962306a36Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 0); 2062306a36Sopenharmony_ci return 1; 2162306a36Sopenharmony_ci} 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ciint count = 0; 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ciSEC("tc") 2662306a36Sopenharmony_ciint classifier_0(struct __sk_buff *skb) 2762306a36Sopenharmony_ci{ 2862306a36Sopenharmony_ci count++; 2962306a36Sopenharmony_ci return subprog_tail(skb); 3062306a36Sopenharmony_ci} 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ciSEC("tc") 3362306a36Sopenharmony_ciint entry(struct __sk_buff *skb) 3462306a36Sopenharmony_ci{ 3562306a36Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 0); 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci return 0; 3862306a36Sopenharmony_ci} 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_cichar __license[] SEC("license") = "GPL"; 41