// SPDX-License-Identifier: GPL-2.0-only

#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>

struct inner_map {
        __uint(type, BPF_MAP_TYPE_ARRAY);
        __uint(max_entries, 5);
        __type(key, int);
        __type(value, int);
} inner_map1 SEC(".maps");

struct outer_map {
        __uint(type, BPF_MAP_TYPE_HASH_OF_MAPS);
        __uint(max_entries, 3);
        __type(key, int);
        __array(values, struct inner_map);
} outer_map1 SEC(".maps") = {
        .values = {
                [2] = &inner_map1,
        },
};

SEC("raw_tp/sys_enter")
int handle__sys_enter(void *ctx)
{
        int outer_key = 2, inner_key = 3;
        int *val;
        void *map;

        map = bpf_map_lookup_elem(&outer_map1, &outer_key);
        if (!map)
                return 1;

        val = bpf_map_lookup_elem(map, &inner_key);
        if (!val)
                return 1;

        if (*val == 1)
                *val = 2;

        return 0;
}

char _license[] SEC("license") = "GPL";