// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2019 Facebook */ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_trace_helpers.h" struct sk_buff { unsigned int len; }; __u64 test_result = 0; SEC("fexit/test_pkt_md_access") int BPF_PROG(test_main2, struct sk_buff *skb, int ret) { int len; __builtin_preserve_access_index(({ len = skb->len; })); if (len != 74 || ret != 0) return 0; test_result = 1; return 0; } char _license[] SEC("license") = "GPL";