1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/bpf.h> 3 4 #include <bpf/bpf_helpers.h> 5 6 struct { 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 13 int count = 0; 14 15 SEC("tc") 16 int classifier_0(struct __sk_buff *skb) 17 { 18 count++; 19 bpf_tail_call_static(skb, &jmp_table, 0); 20 return 1; 21 } 22 23 SEC("tc") 24 int entry(struct __sk_buff *skb) 25 { 26 bpf_tail_call_static(skb, &jmp_table, 0); 27 return 0; 28 } 29 30 char __license[] SEC("license") = "GPL"; 31