root/tools/testing/selftests/bpf/progs/test_btf_newkv.c
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2018 Facebook */
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_legacy.h"

struct ipv_counts {
        unsigned int v4;
        unsigned int v6;
};

struct {
        __uint(type, BPF_MAP_TYPE_ARRAY);
        __uint(max_entries, 4);
        __type(key, int);
        __type(value, struct ipv_counts);
} btf_map SEC(".maps");

__attribute__((noinline))
int test_long_fname_2(void)
{
        struct ipv_counts *counts;
        int key = 0;

        counts = bpf_map_lookup_elem(&btf_map, &key);
        if (!counts)
                return 0;

        counts->v6++;

        return 0;
}

__attribute__((noinline))
int test_long_fname_1(void)
{
        return test_long_fname_2();
}

SEC("dummy_tracepoint")
int _dummy_tracepoint(void *arg)
{
        return test_long_fname_1();
}

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