1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/bpf.h>
3 #include <bpf/bpf_helpers.h>
4 
5 SEC("xdp")
xdp_context(struct xdp_md * xdp)6 int xdp_context(struct xdp_md *xdp)
7 {
8 	void *data = (void *)(long)xdp->data;
9 	__u32 *metadata = (void *)(long)xdp->data_meta;
10 	__u32 ret;
11 
12 	if (metadata + 1 > data)
13 		return XDP_ABORTED;
14 	ret = *metadata;
15 	if (bpf_xdp_adjust_meta(xdp, 4))
16 		return XDP_ABORTED;
17 	return ret;
18 }
19 
20 char _license[] SEC("license") = "GPL";
21