30 lines
581 B
C
30 lines
581 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include <vmlinux.h>
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#include <bpf/bpf_tracing.h>
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#include <bpf/bpf_helpers.h>
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struct {
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__uint(type, BPF_MAP_TYPE_SK_STORAGE);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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__type(key, int);
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__type(value, int);
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} sk_stg_map SEC(".maps");
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SEC("fentry/bpf_sk_storage_free")
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int BPF_PROG(trace_bpf_sk_storage_free, struct sock *sk)
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{
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int *value;
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value = bpf_sk_storage_get(&sk_stg_map, sk, 0,
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BPF_SK_STORAGE_GET_F_CREATE);
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if (value)
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*value = 1;
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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