// SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2020 Facebook */ #include <stddef.h> #include <linux/bpf.h> #include <bpf/bpf_helpers.h> __attribute__ ((noinline)) int f1(struct __sk_buff *skb) { return skb->len; } int f3(int, struct __sk_buff *skb); __attribute__ ((noinline)) int f2(int val, struct __sk_buff *skb) { return f1(skb) + f3(val, (void *)&val); /* type mismatch */ } __attribute__ ((noinline)) int f3(int val, struct __sk_buff *skb) { return skb->ifindex * val; } SEC("tc") int test_cls(struct __sk_buff *skb) { return f1(skb) + f2(2, skb) + f3(3, skb); }