netdev - RE: [PATCH RFC net-next] net: vlan/macvlan: count packets properly with gso

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Date:   Fri, 30 Nov 2018 01:03:23 +0000
From:   "Banerjee, Debabrata" <dbanerje@...mai.com>
To:     'Eric Dumazet' <eric.dumazet@...il.com>,
        "Duyck, Alexander H" <alexander.h.duyck@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH RFC net-next] net: vlan/macvlan: count packets properly
 with gso

> From: Eric Dumazet <eric.dumazet@...il.com>
> On 11/29/2018 01:13 PM, Duyck, Alexander H wrote:
> >
> > Also your bytes are going to be totally messed up as well since the
> > headers are trimmed in the GSO frames. It might be worthwhile to just
> > have a branch based on skb_is_gso that sets the packets and bytes
> > based on the GSO values, and one that sets it for the default case.
> >
> Note that __dev_queue_xmit() is already doing that, no need to re-
> implement in each driver.
> 
> It calls qdisc_pkt_len_init(), meaning that drivers can use qdisc_skb_cb(skb)-
> >pkt_len instead of skb->len
> 
> (Qdisc layers should not modify qdisc_skb_cb(skb)->pkt_len )

This works. But rx bytes are still a problem. I haven't spotted anything quick for this.