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