179d49ba0SDaniel Borkmann // SPDX-License-Identifier: GPL-2.0 279d49ba0SDaniel Borkmann #include <linux/bpf.h> 379d49ba0SDaniel Borkmann 479d49ba0SDaniel Borkmann #include "bpf_helpers.h" 579d49ba0SDaniel Borkmann 679d49ba0SDaniel Borkmann struct { 779d49ba0SDaniel Borkmann __uint(type, BPF_MAP_TYPE_PROG_ARRAY); 879d49ba0SDaniel Borkmann __uint(max_entries, 5); 979d49ba0SDaniel Borkmann __uint(key_size, sizeof(__u32)); 1079d49ba0SDaniel Borkmann __uint(value_size, sizeof(__u32)); 1179d49ba0SDaniel Borkmann } jmp_table SEC(".maps"); 1279d49ba0SDaniel Borkmann 1379d49ba0SDaniel Borkmann SEC("classifier/0") 1479d49ba0SDaniel Borkmann int bpf_func_0(struct __sk_buff *skb) 1579d49ba0SDaniel Borkmann { 1679d49ba0SDaniel Borkmann bpf_tail_call(skb, &jmp_table, 1); 1779d49ba0SDaniel Borkmann return 0; 1879d49ba0SDaniel Borkmann } 1979d49ba0SDaniel Borkmann 2079d49ba0SDaniel Borkmann SEC("classifier/1") 2179d49ba0SDaniel Borkmann int bpf_func_1(struct __sk_buff *skb) 2279d49ba0SDaniel Borkmann { 2379d49ba0SDaniel Borkmann bpf_tail_call(skb, &jmp_table, 2); 2479d49ba0SDaniel Borkmann return 1; 2579d49ba0SDaniel Borkmann } 2679d49ba0SDaniel Borkmann 2779d49ba0SDaniel Borkmann SEC("classifier/2") 2879d49ba0SDaniel Borkmann int bpf_func_2(struct __sk_buff *skb) 2979d49ba0SDaniel Borkmann { 3079d49ba0SDaniel Borkmann return 2; 3179d49ba0SDaniel Borkmann } 3279d49ba0SDaniel Borkmann 3379d49ba0SDaniel Borkmann SEC("classifier/3") 3479d49ba0SDaniel Borkmann int bpf_func_3(struct __sk_buff *skb) 3579d49ba0SDaniel Borkmann { 3679d49ba0SDaniel Borkmann bpf_tail_call(skb, &jmp_table, 4); 3779d49ba0SDaniel Borkmann return 3; 3879d49ba0SDaniel Borkmann } 3979d49ba0SDaniel Borkmann 4079d49ba0SDaniel Borkmann SEC("classifier/4") 4179d49ba0SDaniel Borkmann int bpf_func_4(struct __sk_buff *skb) 4279d49ba0SDaniel Borkmann { 4379d49ba0SDaniel Borkmann bpf_tail_call(skb, &jmp_table, 3); 4479d49ba0SDaniel Borkmann return 4; 4579d49ba0SDaniel Borkmann } 4679d49ba0SDaniel Borkmann 4779d49ba0SDaniel Borkmann SEC("classifier") 4879d49ba0SDaniel Borkmann int entry(struct __sk_buff *skb) 4979d49ba0SDaniel Borkmann { 5079d49ba0SDaniel Borkmann bpf_tail_call(skb, &jmp_table, 0); 5179d49ba0SDaniel Borkmann /* Check multi-prog update. */ 5279d49ba0SDaniel Borkmann bpf_tail_call(skb, &jmp_table, 2); 5379d49ba0SDaniel Borkmann /* Check tail call limit. */ 5479d49ba0SDaniel Borkmann bpf_tail_call(skb, &jmp_table, 3); 5579d49ba0SDaniel Borkmann return 3; 5679d49ba0SDaniel Borkmann } 5779d49ba0SDaniel Borkmann 5879d49ba0SDaniel Borkmann char __license[] SEC("license") = "GPL"; 5979d49ba0SDaniel Borkmann int _version SEC("version") = 1; 60