1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "kern.h"
18 #include <linux/bpf.h>
19 #include <stdint.h>
20 #include "bpf_helpers.h"
21 #include "bpf_net_helpers.h"
22
23 DEFINE_BPF_MAP(test_configuration_map, HASH, uint32_t, uint32_t, 1)
DEFINE_BPF_MAP(test_stats_map_A,HASH,uint64_t,stats_value,NUM_SOCKETS)24 DEFINE_BPF_MAP(test_stats_map_A, HASH, uint64_t, stats_value, NUM_SOCKETS)
25 DEFINE_BPF_MAP(test_stats_map_B, HASH, uint64_t, stats_value, NUM_SOCKETS)
26
27 #define DEFINE_UPDATE_INGRESS_STATS(the_map) \
28 static inline void update_ingress_##the_map(struct __sk_buff* skb) { \
29 uint64_t sock_cookie = bpf_get_socket_cookie(skb); \
30 stats_value* value = bpf_##the_map##_lookup_elem(&sock_cookie); \
31 if (!value) { \
32 stats_value newValue = {}; \
33 bpf_##the_map##_update_elem(&sock_cookie, &newValue, BPF_NOEXIST); \
34 value = bpf_##the_map##_lookup_elem(&sock_cookie); \
35 } \
36 if (value) { \
37 __sync_fetch_and_add(&value->rxPackets, 1); \
38 __sync_fetch_and_add(&value->rxBytes, skb->len); \
39 } \
40 }
41
42 DEFINE_UPDATE_INGRESS_STATS(test_stats_map_A)
43 DEFINE_UPDATE_INGRESS_STATS(test_stats_map_B)
44
45 SEC("skfilter/test")
46 int ingress_prog(struct __sk_buff* skb) {
47 uint32_t key = 1;
48 uint32_t* config = bpf_test_configuration_map_lookup_elem(&key);
49 if (config) {
50 if (*config) {
51 update_ingress_test_stats_map_A(skb);
52 } else {
53 update_ingress_test_stats_map_B(skb);
54 }
55 }
56 return skb->len;
57 }
58
59 LICENSE("Apache 2.0");
60 CRITICAL("bpf_native_test");
61