18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ci#include <linux/bpf.h> 38c2ecf20Sopenharmony_ci 48c2ecf20Sopenharmony_ci#include <bpf/bpf_helpers.h> 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_cistruct { 78c2ecf20Sopenharmony_ci __uint(type, BPF_MAP_TYPE_PROG_ARRAY); 88c2ecf20Sopenharmony_ci __uint(max_entries, 5); 98c2ecf20Sopenharmony_ci __uint(key_size, sizeof(__u32)); 108c2ecf20Sopenharmony_ci __uint(value_size, sizeof(__u32)); 118c2ecf20Sopenharmony_ci} jmp_table SEC(".maps"); 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciSEC("classifier/0") 148c2ecf20Sopenharmony_ciint bpf_func_0(struct __sk_buff *skb) 158c2ecf20Sopenharmony_ci{ 168c2ecf20Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 1); 178c2ecf20Sopenharmony_ci return 0; 188c2ecf20Sopenharmony_ci} 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ciSEC("classifier/1") 218c2ecf20Sopenharmony_ciint bpf_func_1(struct __sk_buff *skb) 228c2ecf20Sopenharmony_ci{ 238c2ecf20Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 2); 248c2ecf20Sopenharmony_ci return 1; 258c2ecf20Sopenharmony_ci} 268c2ecf20Sopenharmony_ci 278c2ecf20Sopenharmony_ciSEC("classifier/2") 288c2ecf20Sopenharmony_ciint bpf_func_2(struct __sk_buff *skb) 298c2ecf20Sopenharmony_ci{ 308c2ecf20Sopenharmony_ci return 2; 318c2ecf20Sopenharmony_ci} 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ciSEC("classifier/3") 348c2ecf20Sopenharmony_ciint bpf_func_3(struct __sk_buff *skb) 358c2ecf20Sopenharmony_ci{ 368c2ecf20Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 4); 378c2ecf20Sopenharmony_ci return 3; 388c2ecf20Sopenharmony_ci} 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ciSEC("classifier/4") 418c2ecf20Sopenharmony_ciint bpf_func_4(struct __sk_buff *skb) 428c2ecf20Sopenharmony_ci{ 438c2ecf20Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 3); 448c2ecf20Sopenharmony_ci return 4; 458c2ecf20Sopenharmony_ci} 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_ciSEC("classifier") 488c2ecf20Sopenharmony_ciint entry(struct __sk_buff *skb) 498c2ecf20Sopenharmony_ci{ 508c2ecf20Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 0); 518c2ecf20Sopenharmony_ci /* Check multi-prog update. */ 528c2ecf20Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 2); 538c2ecf20Sopenharmony_ci /* Check tail call limit. */ 548c2ecf20Sopenharmony_ci bpf_tail_call_static(skb, &jmp_table, 3); 558c2ecf20Sopenharmony_ci return 3; 568c2ecf20Sopenharmony_ci} 578c2ecf20Sopenharmony_ci 588c2ecf20Sopenharmony_cichar __license[] SEC("license") = "GPL"; 598c2ecf20Sopenharmony_ciint _version SEC("version") = 1; 60