Re: [dpdk-dev] [PATCH] doc: announce change in ETH item struct

[Dekel Peled]

Thanks, PSB.

> -----Original Message-----
> From: Andrew Rybchenko <arybche...@solarflare.com>
> Sent: Wednesday, August 5, 2020 1:49 PM
> To: Dekel Peled <dek...@mellanox.com>; dev@dpdk.org
> Cc: jerinjac...@gmail.com; step...@networkplumber.org;
> ajit.khapa...@broadcom.com; maxime.coque...@redhat.com;
> olivier.m...@6wind.com; david.march...@redhat.com;
> ferruh.yi...@intel.com; Asaf Penso <as...@mellanox.com>
> Subject: Re: [dpdk-dev] [PATCH] doc: announce change in ETH item struct
> 
> On 8/4/20 7:01 PM, Dekel Peled wrote:
> > Struct rte_flow_item_eth will be modified to include additional
> > values, indicating existence or absence of VLAN headers following the
> > ETH header, as proposed in RFC
> >
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> > Because of ABI break this change is proposed for 20.11.
> >
> > Signed-off-by: Dekel Peled <dek...@mellanox.com>
> > ---
> >  doc/guides/rel_notes/deprecation.rst | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/doc/guides/rel_notes/deprecation.rst
> > b/doc/guides/rel_notes/deprecation.rst
> > index 5201142..6241709 100644
> > --- a/doc/guides/rel_notes/deprecation.rst
> > +++ b/doc/guides/rel_notes/deprecation.rst
> > @@ -115,6 +115,11 @@ Deprecation Notices
> >    following the IPv6 header, as proposed in RFC
> >
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> >
> > +* ethdev: The ``struct rte_flow_item_eth`` struct will be modified to
> > +include
> > +  additional values, indicating existence or absence of VLAN headers
> > +  following the ETH header, as proposed in RFC
> > +
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> 
> It is unclear how it will coexist with VLAN items in a pattern.
Same as the existing proto field coexist with following VLAN items.

> Are you going to add consistency checks on ethdev-layer?
Not planned currently.

> 
> Also it is unclear why both bit fields and a number are required.
I agree it is redundancy, added for flexibility, but can leave num_of_vlans 
only.

> 
> Referenced RFC lacks definition of S-VLAN anc C-VLAN in the context. Exact
> definition to avoid ambiguity.
These are well defined terms, I will add reference to spec.

> 
> So, it looks required to modify the structure, but I'd not stick to referenced
> RFC, since the result could differ a lot. May be reference it as just an
> example.
Thank you.