netdev - Re: [PATCH v3 net-next 1/1] net_sched: Introduce skbmod action

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Date:   Thu, 08 Sep 2016 09:11:17 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Jamal Hadi Salim <jhs@...atatu.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, daniel@...earbox.net,
        xiyou.wangcong@...il.com,
        John Fastabend <john.r.fastabend@...el.com>
Subject: Re: [PATCH v3 net-next 1/1] net_sched: Introduce skbmod action

On Thu, 2016-09-08 at 09:02 -0700, Eric Dumazet wrote:
> On Thu, 2016-09-08 at 06:38 -0400, Jamal Hadi Salim wrote:
> > On 16-09-06 10:25 AM, Eric Dumazet wrote:
> > 
> > >
> > > Just use u16 in the array ?
> > >
> > > u16 tmpaddr[ETH_ALEN / 2]; /* ether_addr_copy() requirement */
> > >
> > > ether_addr_copy((u8 *)tmpaddr, eth_hdr(skb)->h_dest);
> > > ...
> > >
> > 
> > Ok - thanks Eric. BTW:
> > Nobody has answered my other question:
> > I can get stats to increment with:
> > bstats_update(&d->tcf_bstats, skb);
> > but not:
> > bstats_cpu_update(this_cpu_ptr(d->common.cpu_bstats), skb);
> 
> This simply works for me.
> 
> But maybe you read the stats at the wrong place ?
> 
> Pleas give us more details, thanks !

And double check the tcf_hash_create() call :

Last parameter is a boolean, and you must set it to true if you want per
cpu stats !