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1// SPDX-License-Identifier: GPL-2.02// Copyright (c) 2020 Cloudflare3#include "vmlinux.h"4#include <bpf/bpf_helpers.h>5 6struct {7 __uint(type, BPF_MAP_TYPE_SOCKMAP);8 __uint(max_entries, 1);9 __type(key, __u32);10 __type(value, __u64);11} map SEC(".maps");12 13SEC("sockops")14int bpf_sockmap(struct bpf_sock_ops *skops)15{16 __u32 key = 0;17 18 if (skops->sk)19 bpf_map_update_elem(&map, &key, skops->sk, 0);20 return 0;21}22 23char _license[] SEC("license") = "GPL";24