netdev - RE: [PATCH net 1/2] net: enetc: correct the statistics of rx bytes

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Date: Fri, 2 Jun 2023 10:35:53 +0000
From: Wei Fang <wei.fang@....com>
To: Vladimir Oltean <vladimir.oltean@....com>
CC: Claudiu Manoil <claudiu.manoil@....com>, "davem@...emloft.net"
	<davem@...emloft.net>, "edumazet@...gle.com" <edumazet@...gle.com>,
	"kuba@...nel.org" <kuba@...nel.org>, "pabeni@...hat.com" <pabeni@...hat.com>,
	"ast@...nel.org" <ast@...nel.org>, "daniel@...earbox.net"
	<daniel@...earbox.net>, "hawk@...nel.org" <hawk@...nel.org>,
	"john.fastabend@...il.com" <john.fastabend@...il.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH net 1/2] net: enetc: correct the statistics of rx bytes


> -----Original Message-----
> From: Vladimir Oltean <vladimir.oltean@....com>
> Sent: 2023年6月2日 18:32
> To: Wei Fang <wei.fang@....com>
> Cc: Claudiu Manoil <claudiu.manoil@....com>; davem@...emloft.net;
> edumazet@...gle.com; kuba@...nel.org; pabeni@...hat.com;
> ast@...nel.org; daniel@...earbox.net; hawk@...nel.org;
> john.fastabend@...il.com; netdev@...r.kernel.org;
> linux-kernel@...r.kernel.org
> Subject: Re: [PATCH net 1/2] net: enetc: correct the statistics of rx bytes
> 
> On Fri, Jun 02, 2023 at 05:46:58PM +0800, wei.fang@....com wrote:
> > From: Wei Fang <wei.fang@....com>
> >
> > The rx_bytes of struct net_device_stats should count the length of
> > ethernet frames excluding the FCS. However, there are two problems
> > with the rx_bytes statistics of the current enetc driver. one is that
> > the length of VLAN header is not counted if the VLAN extraction
> > feature is enabled. The other is that the length of L2 header is not
> > counted, because eth_type_trans() is invoked before updating rx_bytes
> > which will subtract the length of L2 header from skb->len.
> > BTW, the rx_bytes statistics of XDP path also have similar problem, I
> > will fix it in another patch.
> >
> > Fixes: a800abd3ecb9 ("net: enetc: move skb creation into
> > enetc_build_skb")
> > Signed-off-by: Wei Fang <wei.fang@....com>
> > ---
> 
> Reviewed-by: Vladimir Oltean <vladimir.oltean@....com>
> 
> By the way, you mangled Jakub's email (kuba@...nel.or) - I've fixed it up.

Yes, I realized this after sending the email. Thank you so much!