linux-kernel - Re: [PATCH v7 net-next] net-core: add InDropOtherhost counter

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Date:   Mon, 7 Feb 2022 19:51:39 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Jeffrey Ji <jeffreyjilinux@...il.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        "David S . Miller" <davem@...emloft.net>,
        Brian Vazquez <brianvv@...gle.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        jeffreyji <jeffreyji@...gle.com>
Subject: Re: [PATCH v7 net-next] net-core: add InDropOtherhost counter

On Mon,  7 Feb 2022 23:57:14 +0000 Jeffrey Ji wrote:
> From: jeffreyji <jeffreyji@...gle.com>
> 
> Increment InDropOtherhost counter when packet dropped due to incorrect 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
> 
> example output from nstat:
> \~# nstat -a | grep InMac
> Ip6InDropOtherhost                  0                  0.0
> IpExtInDropOtherhost                1                  0.0
> 
> Tested: Created 2 netns, sent 1 packet using trafgen from 1 to the other
> with "{eth(daddr=$INCORRECT_MAC...}", verified that nstat showed the
> counter was incremented.

As far as I can tell nobody objected to my suggestion of making this 
a netdev counter, so please switch to working on that. Thanks.