// 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";