| 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, which; |
| 14 | |
| 15 | SEC("tc") |
| 16 | int 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 | |
| 25 | SEC("tc") |
| 26 | int 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 | |
| 34 | char __license[] SEC("license") = "GPL"; |
| 35 |