netdev - Re: [PATCH net-next] net-core: rx_otherhost_dropped to core

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Message-ID: <20220406223141.51881854@kernel.org>
Date:   Wed, 6 Apr 2022 22:31:41 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Jeffrey Ji <jeffreyjilinux@...il.com>
Cc:     Brian Vazquez <brianvv@...gle.com>,
        "David S . Miller" <davem@...emloft.net>,
        Paolo Abeni <pabeni@...hat.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Menglong Dong <imagedong@...cent.com>,
        Petr Machata <petrm@...dia.com>,
        Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Arnd Bergmann <arnd@...db.de>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jeffrey Ji <jeffreyji@...gle.com>
Subject: Re: [PATCH net-next] net-core: rx_otherhost_dropped to core_stats

On Wed,  6 Apr 2022 17:26:00 +0000 Jeffrey Ji wrote:
> From: Jeffrey Ji <jeffreyji@...gle.com>
> 
> Increment rx_otherhost_dropped counter when packet dropped due to
> mismatched dest MAC addr.
> 
> An example when this drop can occur is when manually crafting raw
> packets that will be consumed by a user space application via a tap
> device. For testing purposes local traffic was generated using trafgen
> for the client and netcat to start a server
> 
> Tested: Created 2 netns, sent 1 packet using trafgen from 1 to the other
> with "{eth(daddr=$INCORRECT_MAC...}", verified that iproute2 showed the
> counter was incremented. (Also had to modify iproute2 to show the stat,
> additional patch for that coming next.)
> 
> Signed-off-by: Jeffrey Ji <jeffreyji@...gle.com>

Acked-by: Jakub Kicinski <kuba@...nel.org>