Re: [dpdk-dev] [PATCH 03/13] rte_ether: set PKT_RX_VLAN_STRIPPED in rte_vlan_strip()

[Thomas Monjalon <thomas@monjalon.net>]

09/02/2017 16:56, Olivier MATZ:
> Hi,
> 
> On Mon, 30 Jan 2017 10:54:08 +0100, Thomas Monjalon
> <thomas.monjalon@6wind.com> wrote:
> > It is fixing the introduction of the new flag PKT_RX_VLAN_STRIPPED.
> > 
> > Fixes: b37b528d957c ("mbuf: add new Rx flags for stripped VLAN")
> > 
> > This patch is applying the flag to the software emulation case
> > (currently only for virtio).
> > So the comment of this flag should be changed:
> > 
> > /**
> >  * A vlan has been stripped by the hardware and its tci is saved in
> >  * mbuf->vlan_tci. This can only happen if vlan stripping is enabled
> >  * in the RX configuration of the PMD.
> >  */
> > #define PKT_RX_VLAN_STRIPPED (1ULL <<
> > 6)                                                                         
> > 
> > 
> > > Signed-off-by: Michał Mirosław <michal.miroslaw@atendesoftware.pl>  
> > [...]
> > > --- a/lib/librte_net/rte_ether.h
> > > +++ b/lib/librte_net/rte_ether.h
> > > @@ -357,7 +357,7 @@ static inline int rte_vlan_strip(struct
> > > rte_mbuf *m) return -1;
> > >  
> > >  	struct vlan_hdr *vh = (struct vlan_hdr *)(eh + 1);
> > > -	m->ol_flags |= PKT_RX_VLAN_PKT;
> > > +	m->ol_flags |= PKT_RX_VLAN_PKT | PKT_RX_VLAN_STRIPPED;
> > >  	m->vlan_tci = rte_be_to_cpu_16(vh->vlan_tci);
> > >  
> > >  	/* Copy ether header over rather than moving whole packet
> > > */  
> > 
> > I think this flag should also be removed in the function
> > rte_vlan_insert().
> 
> Agree with Thomas, I think rte_vlan_insert() should be updated too.
> 
> But I don't think the comment of the mbuf flag should be changed:
> "stripped by the hardware" is a bit ambiguous for virtual drivers, but
> we can understand that for virtual drivers the same work is done in
> software.

No more comment?

Olivier, the author is not replying.
I think we should have updated the patch ourself.
How risky it is for 17.05?
Should it wait for 17.08?