1// SPDX-License-Identifier: GPL-2.0
 2
 3#include <vmlinux.h>
 4#include "xdp_metadata.h"
 5#include <bpf/bpf_helpers.h>
 6#include <bpf/bpf_endian.h>
 7
 8extern int bpf_xdp_metadata_rx_hash(const struct xdp_md *ctx, __u32 *hash,
 9				    enum xdp_rss_hash_type *rss_type) __ksym;
10
11int called;
12
13SEC("freplace/rx")
14int freplace_rx(struct xdp_md *ctx)
15{
16	enum xdp_rss_hash_type type = 0;
17	u32 hash = 0;
18	/* Call _any_ metadata function to make sure we don't crash. */
19	bpf_xdp_metadata_rx_hash(ctx, &hash, &type);
20	called++;
21	return XDP_PASS;
22}
23
24char _license[] SEC("license") = "GPL";