1 /* Copyright (c) 2017 Facebook 2 * 3 * This program is free software; you can redistribute it and/or 4 * modify it under the terms of version 2 of the GNU General Public 5 * License as published by the Free Software Foundation. 6 */ 7 #include <stddef.h> 8 #include <linux/bpf.h> 9 #include <linux/pkt_cls.h> 10 #include "bpf_helpers.h" 11 12 /* It is a dumb bpf program such that it must have no 13 * issue to be loaded since testing the verifier is 14 * not the focus here. 15 */ 16 17 int _version SEC("version") = 1; 18 19 struct bpf_map_def SEC("maps") test_map_id = { 20 .type = BPF_MAP_TYPE_ARRAY, 21 .key_size = sizeof(__u32), 22 .value_size = sizeof(__u64), 23 .max_entries = 1, 24 }; 25 26 SEC("test_obj_id_dummy") test_obj_id(struct __sk_buff * skb)27int test_obj_id(struct __sk_buff *skb) 28 { 29 __u32 key = 0; 30 __u64 *value; 31 32 value = bpf_map_lookup_elem(&test_map_id, &key); 33 34 return TC_ACT_OK; 35 } 36