netdev - Re: [net-next PATCH v2 0/4] Extend action skbedit to RX queue mapping

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220921132929.3f4ca04d@kernel.org>
Date:   Wed, 21 Sep 2022 13:29:29 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Amritha Nambiar <amritha.nambiar@...el.com>
Cc:     netdev@...r.kernel.org, alexander.duyck@...il.com,
        jhs@...atatu.com, jiri@...nulli.us, xiyou.wangcong@...il.com,
        vinicius.gomes@...el.com, sridhar.samudrala@...el.com
Subject: Re: [net-next PATCH v2 0/4] Extend action skbedit to RX queue
 mapping

On Wed, 07 Sep 2022 18:23:57 -0700 Amritha Nambiar wrote:
> Based on the discussion on
> https://lore.kernel.org/netdev/20220429171717.5b0b2a81@kernel.org/,
> the following series extends skbedit tc action to RX queue mapping.
> Currently, skbedit action in tc allows overriding of transmit queue.
> Extending this ability of skedit action supports the selection of receive
> queue for incoming packets. Offloading this action is added for receive
> side. Enabled ice driver to offload this type of filter into the
> hardware for accepting packets to the device's receive queue.
> 
> v2: Added documentation in Documentation/networking

Alex and I had a quick chat about this, I think we can work around 
the difficulties with duplicating the behavior in SW by enforcing 
that the action can only be used with skip_sw. Either skbedit or
Alex's suggested approach with act_mirred. Or new hw-only action.

Alex pointed out that it'd be worth documenting the priorities of 
aRFS vs this thing, which one will be used if HW matches both.