netdev - Re: [PATCH net-next v2 11/12] drivers: vxlan: vnifilter: per vni stats

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Date:   Fri, 25 Feb 2022 14:34:31 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Roopa Prabhu <roopa@...dia.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        stephen@...workplumber.org, nikolay@...ulusnetworks.com,
        idosch@...dia.com, dsahern@...il.com, bpoirier@...dia.com
Subject: Re: [PATCH net-next v2 11/12] drivers: vxlan: vnifilter: per vni
 stats

On Fri, 25 Feb 2022 09:49:20 -0800 Roopa Prabhu wrote:
> On 2/23/22 20:02, Jakub Kicinski wrote:
> > On Tue, 22 Feb 2022 02:52:29 +0000 Roopa Prabhu wrote:  
> >>   /* vxlan_multicast.c */
> >>   int vxlan_multicast_join(struct vxlan_dev *vxlan);
> >>   int vxlan_multicast_leave(struct vxlan_dev *vxlan);
> >> +void vxlan_vnifilter_count(struct vxlan_dev *vxlan, __be32 vni,
> >> +			   int type, unsigned int len)
> >> +{
> >> +	struct vxlan_vni_node *vninode;
> >> +
> >> +	if (!(vxlan->cfg.flags & VXLAN_F_VNIFILTER))
> >> +		return;
> >> +
> >> +	vninode = vxlan_vnifilter_lookup(vxlan, vni);
> >> +	if (!vninode)
> >> +		return;  
> > Don't we end up calling vxlan_vnifilter_lookup() multiple times for
> > every packet? Can't we remember the vninode from vxlan_vs_find_vni()?
> >  
> you are right, its done this way to not propagate vninode into vxlan_rcv.
> 
> let me see what we can do here.thanks

Thanks for making the changes, BTW there was also a transient warning
here about vxlan_vnifilter_stats_get() being defined but not used.
Maybe move it to the next patch?