Re: [PATCH next] nft_meta: add skb hash get support

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On Mon, Oct 31, 2016 at 01:44:29PM +0100, Florian Westphal wrote:
> Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
> ---
> NB1: Alternative is to place this in nft_hash, but that uses
> an sreg so i think meta is fine.

Right. We may still reuse all these attributes though if we use the
hash expression:

 * @NFTA_HASH_DREG: destination register (NLA_U32)
 * @NFTA_HASH_MODULUS: modulus value (NLA_U32)
 * @NFTA_HASH_OFFSET: add this offset value to hash result (NLA_U32)

This would need a new NFTA_HASH_TYPE, defaulting on jhash.

Otherwise we would need a scaling expression in case we want to use
this new meta field for load balancing just like af_packet fanout. Do
you prefer to follow up this path?
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