| 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 |