1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2020 Facebook */
3 #include "bpf_iter.h"
4 #include <bpf/bpf_helpers.h>
5
6 char _license[] SEC("license") = "GPL";
7
8 __u32 value_sum = 0;
9
10 SEC("iter/bpf_map_elem")
11 int dump_bpf_hash_map(struct bpf_iter__bpf_map_elem *ctx)
12 {
13 void *value = ctx->value;
14
15 if (value == (void *)0)
16 return 0;
17
18 /* negative offset, verifier failure. */
19 value_sum += *(__u32 *)(value - 4);
20 return 0;
21 }
22
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