#include "../../include/bpf_api.h"

#define MAP_INNER_ID	42

struct bpf_elf_map __section_maps map_inner = {

	.type		= BPF_MAP_TYPE_ARRAY,

	.size_key	= sizeof(uint32_t),

	.size_value	= sizeof(uint32_t),

	.id		= MAP_INNER_ID,

	.inner_idx	= 0,

	.pinning	= PIN_GLOBAL_NS,

	.max_elem	= 1,

};

struct bpf_elf_map __section_maps map_outer = {

	.type		= BPF_MAP_TYPE_ARRAY_OF_MAPS,

	.size_key	= sizeof(uint32_t),

	.size_value	= sizeof(uint32_t),

	.inner_id	= MAP_INNER_ID,

	.pinning	= PIN_GLOBAL_NS,

	.max_elem	= 1,

};

__section("egress")

int emain(struct __sk_buff *skb)

{

	struct bpf_elf_map *map_inner;

	int key = 0, *val;

	map_inner = map_lookup_elem(&map_outer, &key);

	if (map_inner) {

		val = map_lookup_elem(map_inner, &key);

		if (val)

			lock_xadd(val, 1);

	}

	return BPF_H_DEFAULT;

}

__section("ingress")

int imain(struct __sk_buff *skb)

{

	struct bpf_elf_map *map_inner;

	int key = 0, *val;

	map_inner = map_lookup_elem(&map_outer, &key);

	if (map_inner) {

		val = map_lookup_elem(map_inner, &key);

		if (val)

			printt("map val: %d\n", *val);

	}

	return BPF_H_DEFAULT;

}

BPF_LICENSE("GPL");