Commit 96b1a098 authored by Jesper Dangaard Brouer's avatar Jesper Dangaard Brouer Committed by Alexei Starovoitov
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veth: bpf_xdp_metadata_rx_hash add xdp rss hash type 



Update API for bpf_xdp_metadata_rx_hash() with arg for xdp rss hash type.

The veth driver currently only support XDP-hints based on SKB code path.
The SKB have lost information about the RSS hash type, by compressing
the information down to a single bitfield skb->l4_hash, that only knows
if this was a L4 hash value.

In preparation for veth, the xdp_rss_hash_type have an L4 indication
bit that allow us to return a meaningful L4 indication when working
with SKB based packets.

Fixes: 306531f0 ("veth: Support RX XDP metadata")
Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Acked-by: default avatarToke Høiland-Jørgensen <toke@redhat.com>
Acked-by: default avatarStanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/168132893055.340624.16209448340644513469.stgit@firesoul


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 67f245c2

drivers/net/veth.c

+5 −2
Original line number Diff line number Diff line
@@ -1652,11 +1652,14 @@ static int veth_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash, 
			    enum xdp_rss_hash_type *rss_type)

{

	struct veth_xdp_buff *_ctx = (void *)ctx;

	struct sk_buff *skb = _ctx->skb;



	if (!_ctx->skb)

	if (!skb)

		return -ENODATA;



	*hash = skb_get_hash(_ctx->skb);

	*hash = skb_get_hash(skb);

	*rss_type = skb->l4_hash ? XDP_RSS_TYPE_L4_ANY : XDP_RSS_TYPE_NONE;



	return 0;

}