netdev - Re: [PATCH v3 net-next 1/6] net: sched: propagate "skip_sw" flag to struct flow_cls_common

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: <20241030174703.594ac0af@kernel.org>
Date: Wed, 30 Oct 2024 17:47:03 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Vladimir Oltean <vladimir.oltean@....com>
Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Andrew Lunn
 <andrew@...n.ch>, Florian Fainelli <f.fainelli@...il.com>, Petr Machata
 <petrm@...dia.com>, Ido Schimmel <idosch@...dia.com>, Claudiu Manoil
 <claudiu.manoil@....com>, Alexandre Belloni
 <alexandre.belloni@...tlin.com>, UNGLinuxDriver@...rochip.com, Jamal Hadi
 Salim <jhs@...atatu.com>, Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko
 <jiri@...nulli.us>, Vlad Buslov <vladbu@...dia.com>, Simon Horman
 <horms@...nel.org>, Christian Marangi <ansuelsmth@...il.com>, Arun Ramadoss
 <arun.ramadoss@...rochip.com>, Arınç ÜNAL
 <arinc.unal@...nc9.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 net-next 1/6] net: sched: propagate "skip_sw" flag to
 struct flow_cls_common_offload

On Wed, 23 Oct 2024 16:52:46 +0300 Vladimir Oltean wrote:
> The most that the switchdev port
> can do is to extract the matching packets from its offloaded data path
> and send them to the CPU.

FTR devices implementing OVS offload can attach metadata to such
packets, and then the driver does the redirect. The SW TC path is 
not engaged. IIRC OVS has a concept of internal ports which are
"stack facing" ports in addition to the main bridge device.
And in some offloaded configurations people want HW to redirect 
to those.