// SPDX-License-Identifier: GPL-2.0 #include <linux/bpf.h> #include <bpf/bpf_helpers.h> SEC("xdp") int xdp_context(struct xdp_md *xdp) { void *data = (void *)(long)xdp->data; __u32 *metadata = (void *)(long)xdp->data_meta; __u32 ret; if (metadata + 1 > data) return XDP_ABORTED; ret = *metadata; if (bpf_xdp_adjust_meta(xdp, 4)) return XDP_ABORTED; return ret; } char _license[] SEC("license") = "GPL";