// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>

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

__u32 value_sum = 0;

SEC("iter/bpf_map_elem")
int dump_bpf_hash_map(struct bpf_iter__bpf_map_elem *ctx)
{
        void *value = ctx->value;

        if (value == (void *)0)
                return 0;

        /* negative offset, verifier failure. */
        value_sum += *(__u32 *)(value - 4);
        return 0;
}