1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (c) 2017 Facebook 3 */ 4 #include <stddef.h> 5 #include <linux/bpf.h> 6 #include <linux/pkt_cls.h> 7 #include "bpf_helpers.h" 8 9 /* It is a dumb bpf program such that it must have no 10 * issue to be loaded since testing the verifier is 11 * not the focus here. 12 */ 13 14 int _version SEC("version") = 1; 15 16 struct bpf_map_def SEC("maps") test_map_id = { 17 .type = BPF_MAP_TYPE_ARRAY, 18 .key_size = sizeof(__u32), 19 .value_size = sizeof(__u64), 20 .max_entries = 1, 21 }; 22 23 SEC("test_obj_id_dummy") 24 int test_obj_id(struct __sk_buff *skb) 25 { 26 __u32 key = 0; 27 __u64 *value; 28 29 value = bpf_map_lookup_elem(&test_map_id, &key); 30 31 return TC_ACT_OK; 32 } 33