179d49ba0SDaniel Borkmann // SPDX-License-Identifier: GPL-2.0
279d49ba0SDaniel Borkmann #include <linux/bpf.h>
379d49ba0SDaniel Borkmann 
43e689141SToke Høiland-Jørgensen #include <bpf/bpf_helpers.h>
579d49ba0SDaniel Borkmann 
679d49ba0SDaniel Borkmann struct {
779d49ba0SDaniel Borkmann 	__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
879d49ba0SDaniel Borkmann 	__uint(max_entries, 1);
979d49ba0SDaniel Borkmann 	__uint(key_size, sizeof(__u32));
1079d49ba0SDaniel Borkmann 	__uint(value_size, sizeof(__u32));
1179d49ba0SDaniel Borkmann } jmp_table SEC(".maps");
1279d49ba0SDaniel Borkmann 
1379d49ba0SDaniel Borkmann static volatile int count;
1479d49ba0SDaniel Borkmann 
1579d49ba0SDaniel Borkmann SEC("classifier/0")
1679d49ba0SDaniel Borkmann int bpf_func_0(struct __sk_buff *skb)
1779d49ba0SDaniel Borkmann {
1879d49ba0SDaniel Borkmann 	count++;
19faef26faSDaniel Borkmann 	bpf_tail_call_static(skb, &jmp_table, 0);
2079d49ba0SDaniel Borkmann 	return 1;
2179d49ba0SDaniel Borkmann }
2279d49ba0SDaniel Borkmann 
2379d49ba0SDaniel Borkmann SEC("classifier")
2479d49ba0SDaniel Borkmann int entry(struct __sk_buff *skb)
2579d49ba0SDaniel Borkmann {
26faef26faSDaniel Borkmann 	bpf_tail_call_static(skb, &jmp_table, 0);
2779d49ba0SDaniel Borkmann 	return 0;
2879d49ba0SDaniel Borkmann }
2979d49ba0SDaniel Borkmann 
3079d49ba0SDaniel Borkmann char __license[] SEC("license") = "GPL";
3179d49ba0SDaniel Borkmann int _version SEC("version") = 1;
32