44 lines
759 B
C
44 lines
759 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2018 Facebook */
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#include <linux/bpf.h>
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#include "bpf_helpers.h"
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int _version SEC("version") = 1;
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struct ipv_counts {
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unsigned int v4;
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unsigned int v6;
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};
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struct bpf_map_def SEC("maps") btf_map = {
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.type = BPF_MAP_TYPE_ARRAY,
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.key_size = sizeof(int),
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.value_size = sizeof(struct ipv_counts),
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.max_entries = 4,
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};
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struct dummy_tracepoint_args {
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unsigned long long pad;
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struct sock *sock;
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};
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SEC("dummy_tracepoint")
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int _dummy_tracepoint(struct dummy_tracepoint_args *arg)
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{
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struct ipv_counts *counts;
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int key = 0;
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if (!arg->sock)
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return 0;
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counts = bpf_map_lookup_elem(&btf_map, &key);
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if (!counts)
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return 0;
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counts->v6++;
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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