162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci#include <linux/bpf.h> 362306a36Sopenharmony_ci 462306a36Sopenharmony_ci#include <bpf/bpf_helpers.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_ciint count, which; 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ciSEC("tc") 1662306a36Sopenharmony_ciint classifier_0(struct __sk_buff *skb) 1762306a36Sopenharmony_ci{ 1862306a36Sopenharmony_ci count++; 1962306a36Sopenharmony_ci if (__builtin_constant_p(which)) 2062306a36Sopenharmony_ci __bpf_unreachable(); 2162306a36Sopenharmony_ci bpf_tail_call(skb, &jmp_table, which); 2262306a36Sopenharmony_ci return 1; 2362306a36Sopenharmony_ci} 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ciSEC("tc") 2662306a36Sopenharmony_ciint entry(struct __sk_buff *skb) 2762306a36Sopenharmony_ci{ 2862306a36Sopenharmony_ci if (__builtin_constant_p(which)) 2962306a36Sopenharmony_ci __bpf_unreachable(); 3062306a36Sopenharmony_ci bpf_tail_call(skb, &jmp_table, which); 3162306a36Sopenharmony_ci return 0; 3262306a36Sopenharmony_ci} 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_cichar __license[] SEC("license") = "GPL"; 35