1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (c) 2018 Facebook */ 3 #include <linux/bpf.h> 4 #include "bpf_helpers.h" 5 #include "bpf_legacy.h" 6 7 int _version SEC("version") = 1; 8 9 struct ipv_counts { 10 unsigned int v4; 11 unsigned int v6; 12 }; 13 14 struct bpf_map_def SEC("maps") btf_map = { 15 .type = BPF_MAP_TYPE_ARRAY, 16 .key_size = sizeof(int), 17 .value_size = sizeof(struct ipv_counts), 18 .max_entries = 4, 19 }; 20 21 BPF_ANNOTATE_KV_PAIR(btf_map, int, struct ipv_counts); 22 23 struct dummy_tracepoint_args { 24 unsigned long long pad; 25 struct sock *sock; 26 }; 27 28 __attribute__((noinline)) test_long_fname_2(struct dummy_tracepoint_args * arg)29int test_long_fname_2(struct dummy_tracepoint_args *arg) 30 { 31 struct ipv_counts *counts; 32 int key = 0; 33 34 if (!arg->sock) 35 return 0; 36 37 counts = bpf_map_lookup_elem(&btf_map, &key); 38 if (!counts) 39 return 0; 40 41 counts->v6++; 42 43 return 0; 44 } 45 46 __attribute__((noinline)) test_long_fname_1(struct dummy_tracepoint_args * arg)47int test_long_fname_1(struct dummy_tracepoint_args *arg) 48 { 49 return test_long_fname_2(arg); 50 } 51 52 SEC("dummy_tracepoint") _dummy_tracepoint(struct dummy_tracepoint_args * arg)53int _dummy_tracepoint(struct dummy_tracepoint_args *arg) 54 { 55 return test_long_fname_1(arg); 56 } 57 58 char _license[] SEC("license") = "GPL"; 59