Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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, 2);
9 __uint(key_size, sizeof(__u32));
10 __uint(value_size, sizeof(__u32));
11} jmp_table SEC(".maps");
12
13int count = 0;
14
15SEC("tc")
16int classifier_0(struct __sk_buff *skb)
17{
18 count++;
19 bpf_tail_call_static(skb, &jmp_table, 0);
20 return 1;
21}
22
23SEC("tc")
24int entry(struct __sk_buff *skb)
25{
26 /* prog == NULL case */
27 bpf_tail_call_static(skb, &jmp_table, 1);
28
29 bpf_tail_call_static(skb, &jmp_table, 0);
30 return 0;
31}
32
33char __license[] SEC("license") = "GPL";