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From: Hans Schultz <schultz.hans@gmail.com>
In-Reply-To: <YpCgxtJf9Qe7fTFd@shredder>
References: <20220524152144.40527-1-schultz.hans+netdev@gmail.com>
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 <Yo+LAj1vnjq0p36q@shredder> <86sfov2w8k.fsf@gmail.com>
 <YpCgxtJf9Qe7fTFd@shredder>
Date: Tue, 31 May 2022 11:34:21 +0200
Message-ID: <86sfoqgi5e.fsf@gmail.com>
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Subject: Re: [Bridge] [PATCH V3 net-next 1/4] net: bridge: add fdb flag to
 extent locked port feature
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To: Ido Schimmel <idosch@idosch.org>, Hans Schultz <schultz.hans@gmail.com>
Cc: Ivan Vecera <ivecera@redhat.com>, Andrew Lunn <andrew@lunn.ch>, Florian Fainelli <f.fainelli@gmail.com>, Jiri Pirko <jiri@resnulli.us>, Daniel Borkmann <daniel@iogearbox.net>, netdev@vger.kernel.org, Nikolay Aleksandrov <razor@blackwall.org>, bridge@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Ido Schimmel <idosch@nvidia.com>, Vivien Didelot <vivien.didelot@gmail.com>, Eric Dumazet <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>, linux-kselftest@vger.kernel.org, Roopa Prabhu <roopa@nvidia.com>, kuba@kernel.org, Vladimir Oltean <olteanv@gmail.com>, Shuah Khan <shuah@kernel.org>, davem@davemloft.net

> Just to give you another data point about how this works in other
> devices, I can say that at least in Spectrum this works a bit
> differently. Packets that ingress via a locked port and incur an FDB
> miss are trapped to the CPU where they should be injected into the Rx
> path so that the bridge will create the 'locked' FDB entry and notify it
> to user space. The packets are obviously rated limited as the CPU cannot
> handle billions of packets per second, unlike the ASIC. The limit is not
> per bridge port (or even per bridge), but instead global to the entire
> device.

Btw, will the bridge not create a SWITCHDEV_FDB_ADD_TO_DEVICE event
towards the switchcore in the scheme you mention and thus add an entry
that opens up for the specified mac address?