25 lines · c
1// SPDX-License-Identifier: GPL-2.02 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";25