netdev - Re: Bridge port isolation offload

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Message-ID: <20210810104251.k7w76aqlvsvb3jcy@skbuf>
Date:   Tue, 10 Aug 2021 13:42:51 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     DENG Qingfang <dqfext@...il.com>
Cc:     Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        David Miller <davem@...emloft.net>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        bridge@...ts.linux-foundation.org, netdev <netdev@...r.kernel.org>,
        Vivien Didelot <vivien.didelot@...il.com>
Subject: Re: Bridge port isolation offload

On Tue, Aug 10, 2021 at 12:40:49PM +0800, DENG Qingfang wrote:
> Hi,
> 
> Bridge port isolation flag (BR_ISOLATED) was added in commit
> 7d850abd5f4e. But switchdev does not offload it currently.
> It should be easy to implement in drivers, just like bridge offload
> but prevent isolated ports to communicate with each other.
> 
> Your thoughts?

If nothing else, do add BR_ISOLATED to BR_PORT_FLAGS_HW_OFFLOAD so that
switchdev drivers which have an offloaded data plane have a chance to
reject this new bridge port flag if they don't support it yet.