1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 Facebook */
3 #include <linux/bpf.h>
4 #include <bpf/bpf_helpers.h>
5 #include <bpf/bpf_tracing.h>
6 
7 struct sk_buff {
8 	unsigned int len;
9 };
10 
11 __u64 test_result = 0;
12 
13 SEC("fexit/test_pkt_md_access")
BPF_PROG(test_main2,struct sk_buff * skb,int ret)14 int BPF_PROG(test_main2, struct sk_buff *skb, int ret)
15 {
16 	int len;
17 
18 	__builtin_preserve_access_index(({
19 		len = skb->len;
20 	}));
21 	if (len != 74 || ret != 0)
22 		return 0;
23 
24 	test_result = 1;
25 	return 0;
26 }
27 char _license[] SEC("license") = "GPL";
28