1 // SPDX-License-Identifier: GPL-2.0-only
2 
3 /*
4  * Copyright 2020 Google LLC.
5  */
6 
7 #include <errno.h>
8 #include <linux/bpf.h>
9 #include <linux/ip.h>
10 #include <linux/udp.h>
11 #include <bpf/bpf_helpers.h>
12 
13 #include "progs/cg_storage_multi.h"
14 
15 struct {
16 	__uint(type, BPF_MAP_TYPE_CGROUP_STORAGE);
17 	__type(key, struct bpf_cgroup_storage_key);
18 	__type(value, struct cgroup_value);
19 } cgroup_storage SEC(".maps");
20 
21 __u32 invocations = 0;
22 
23 SEC("cgroup_skb/egress")
egress(struct __sk_buff * skb)24 int egress(struct __sk_buff *skb)
25 {
26 	struct cgroup_value *ptr_cg_storage =
27 		bpf_get_local_storage(&cgroup_storage, 0);
28 
29 	__sync_fetch_and_add(&ptr_cg_storage->egress_pkts, 1);
30 	__sync_fetch_and_add(&invocations, 1);
31 
32 	return 1;
33 }
34