netdev - Re: [PATCH 08/14] net: vlan: remove invalid VLAN protocol warning

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Date:   Tue, 8 Nov 2022 12:52:37 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Felix Fietkau <nbd@....name>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/14] net: vlan: remove invalid VLAN protocol warning

On Tue, Nov 08, 2022 at 11:42:09AM +0100, Felix Fietkau wrote:
> Okay, I will stick with METADATA_HW_PORT_MUX for now. If we use it in the
> flow dissector to avoid the tagger specific fixup, we might as well use it
> in DSA to skip the tag proto receive call. What do you think?

I suppose that dsa_switch_rcv() could test for the presence of a metadata_dst
and treat that generically if present, without unnecessarily calling down into
the tagging protocol ->rcv() call. The assumption being that the metadata_dst
is always formatted (by the DSA master) in a vendor-agnostic way.