netdev - Re: [PATCH RFC,WIP 5/5] netfilter: nft_flow_offload: add ndo hooks for hardware offload

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Date:   Sat, 11 Nov 2017 13:49:29 +0100
From:   Felix Fietkau <nbd@....name>
To:     Pablo Neira Ayuso <pablo@...filter.org>,
        netfilter-devel@...r.kernel.org
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH RFC,WIP 5/5] netfilter: nft_flow_offload: add ndo hooks
 for hardware offload

On 2017-11-03 16:26, Pablo Neira Ayuso wrote:
> This patch adds the infrastructure to offload flows to hardware, in case
> the nic/switch comes with built-in flow tables capabilities.
> 
> If the hardware comes with not hardware flow tables or they have
> limitations in terms of features, this falls back to the software
> generic flow table implementation.
> 
> The software flow table aging thread skips entries that resides in the
> hardware, so the hardware will be responsible for releasing this flow
> table entry too.
> 
> Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Hi Pablo,

I'd like to start playing with those patches in OpenWrt/LEDE soon. I'm
also considering making a patch that adds iptables support.
For that to work, I think it would be a good idea to keep the code that
tries to offload flows to hardware in nf_flow_offload.c instead, so that
it can be shared with iptables integration.

By the way, do you have a git tree where you keep the current version of
your patch set?

Thanks,

- Felix