linux-kernel - Re: What is the best way to provide FDB related metrics to user space?

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Message-ID: <20230324144917.32lnpgtw5auuyovy@skbuf>
Date:   Fri, 24 Mar 2023 16:49:17 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Andrew Lunn <andrew@...n.ch>,
        Eric Dumazet <edumazet@...gle.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Woojung Huh <woojung.huh@...rochip.com>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        UNGLinuxDriver@...rochip.com,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Roopa Prabhu <roopa@...dia.com>,
        Ido Schimmel <idosch@...dia.com>
Subject: Re: What is the best way to provide FDB related metrics to user
 space?

On Fri, Mar 24, 2023 at 04:43:51PM +0200, Vladimir Oltean wrote:
> Also, some DSA switches have a VLAN-unaware FDB, and if the bridge is
> VLAN-aware, it will have one FDB entry per each VLAN, whereas the
> hardware table will have a single FDB entry.

Sorry, imprecise language. I shouldn't have expressed this in terms of
"VLAN-unaware" and "VLAN-aware", but rather, in terms of "Shared VLAN
learning" and "Independent VLAN learning". Where the software bridge
implementation uses IVL, certain switches might use SVL.