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From: Vladimir Oltean <olteanv@gmail.com>
To: DENG Qingfang <dqfext@gmail.com>
Cc: "Sean Wang" <sean.wang@mediatek.com>,
	"Landen Chao" <Landen.Chao@mediatek.com>,
	"Andrew Lunn" <andrew@lunn.ch>,
	"Vivien Didelot" <vivien.didelot@gmail.com>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Matthias Brugger" <matthias.bgg@gmail.com>,
	netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
	"Eric Woudstra" <ericwouds@gmail.com>,
	"René van Dorst" <opensource@vdorst.com>,
	"Frank Wunderlich" <frank-w@public-files.de>,
	"Ilya Lipnitskiy" <ilya.lipnitskiy@gmail.com>
Subject: Re: [PATCH net-next v2 4/4] net: dsa: mt7530: always install FDB entries with IVL and FID 1
Date: Tue, 3 Aug 2021 21:23:33 +0300	[thread overview]
Message-ID: <20210803182333.s2oc4yizwrzy746i@skbuf> (raw)
In-Reply-To: <20210803175354.3026608-1-dqfext@gmail.com>

On Wed, Aug 04, 2021 at 01:53:54AM +0800, DENG Qingfang wrote:
> On Tue, Aug 03, 2021 at 07:51:38PM +0300, Vladimir Oltean wrote:
> > 
> > The way FDB entries are installed now makes a lot more intuitive sense.
> 
> Did you forget to add the Reviewed-by tag?

Yeah, in fact I did. I was in a rush and by the time I figured that
I didn't do that, I had already left home.

Still, in fact the patch is obviously correct, which is nice. Standalone
ports never learn and the FDB lookup will always miss because it's in
FID 0 (a separate FID compared to the bridge ports) and there is no FDB
entry there. Packets will always be flooded to their only possible
destination, the CPU port. Ports under VLAN-unaware bridges always use
IVL and learn using the pvid, which is zero, and which happily coincides
with the VID which the bridge uses to install VLAN-unaware FDB entries.
Ports under VLAN-aware bridges again use IVL but the VID is taken from
the packet not just from the pvid, so the VID will be >= 1 there. Again
it coincides with the vid that the bridge uses to offload FDB entries.
Nice, I really like it, it is really simple.

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>

  reply	other threads:[~2021-08-03 18:23 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-03 16:04 [PATCH net-next v2 0/4] mt7530 software fallback bridging fix DENG Qingfang
2021-08-03 16:04 ` [PATCH net-next v2 1/4] net: dsa: mt7530: enable assisted learning on CPU port DENG Qingfang
2021-08-03 16:04 ` [PATCH net-next v2 2/4] net: dsa: mt7530: use independent VLAN learning on VLAN-unaware bridges DENG Qingfang
2021-08-03 16:48   ` Vladimir Oltean
2021-08-03 17:13     ` DENG Qingfang
2021-08-03 16:04 ` [PATCH net-next v2 3/4] net: dsa: mt7530: set STP state on filter ID 1 DENG Qingfang
2021-08-03 16:50   ` Vladimir Oltean
2021-08-03 16:04 ` [PATCH net-next v2 4/4] net: dsa: mt7530: always install FDB entries with IVL and FID 1 DENG Qingfang
2021-08-03 16:51   ` Vladimir Oltean
2021-08-03 17:53     ` DENG Qingfang
2021-08-03 18:23       ` Vladimir Oltean [this message]
2021-08-04  9:40 ` [PATCH net-next v2 0/4] mt7530 software fallback bridging fix patchwork-bot+netdevbpf

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