1// SPDX-License-Identifier: GPL-2.0
 2#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";

 1// SPDX-License-Identifier: GPL-2.0
 2#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";