netdev - Re: [PATCH net v2] net: ethtool: Allow matching on vlan DEI bit

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Date:   Wed, 12 Jun 2019 11:06:20 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Maxime Chevallier <maxime.chevallier@...tlin.com>
Cc:     davem@...emloft.net, Pablo Neira Ayuso <pablo@...filter.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jiri Pirko <jiri@...lanox.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Antoine Tenart <antoine.tenart@...tlin.com>,
        thomas.petazzoni@...tlin.com,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Toshiaki Makita <toshiaki.makita1@...il.com>
Subject: Re: [PATCH net v2] net: ethtool: Allow matching on vlan DEI bit

On Wed, 12 Jun 2019 17:18:38 +0200, Maxime Chevallier wrote:
> Using ethtool, users can specify a classification action matching on the
> full vlan tag, which includes the DEI bit (also previously called CFI).
> 
> However, when converting the ethool_flow_spec to a flow_rule, we use
> dissector keys to represent the matching patterns.
> 
> Since the vlan dissector key doesn't include the DEI bit, this
> information was silently discarded when translating the ethtool
> flow spec in to a flow_rule.
> 
> This commit adds the DEI bit into the vlan dissector key, and allows
> propagating the information to the driver when parsing the ethtool flow
> spec.
> 
> Fixes: eca4205f9ec3 ("ethtool: add ethtool_rx_flow_spec to flow_rule structure translator")
> Reported-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
> Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>

LGTM, thanks!