RE: [PATCH] net/filter: Enable the vnet_hdr_support by default

["Zhang, Chen" <chen.zhang@intel.com>]

> -----Original Message-----
> From: Jason Wang <jasowang@redhat.com>
> Sent: Thursday, November 11, 2021 10:50 AM
> To: Markus Armbruster <armbru@redhat.com>
> Cc: Zhang, Chen <chen.zhang@intel.com>; qemu-dev <qemu-
> devel@nongnu.org>; Li Zhijian <lizhijian@cn.fujitsu.com>
> Subject: Re: [PATCH] net/filter: Enable the vnet_hdr_support by default
> 
> On Wed, Nov 10, 2021 at 4:36 PM Markus Armbruster <armbru@redhat.com>
> wrote:
> >
> > "Zhang, Chen" <chen.zhang@intel.com> writes:
> >
> > >> -----Original Message-----
> > >> From: Markus Armbruster <armbru@redhat.com>
> > >> Sent: Wednesday, November 10, 2021 2:21 PM
> > >> To: Zhang, Chen <chen.zhang@intel.com>
> > >> Cc: Jason Wang <jasowang@redhat.com>; qemu-dev <qemu-
> > >> devel@nongnu.org>; Li Zhijian <lizhijian@cn.fujitsu.com>
> > >> Subject: Re: [PATCH] net/filter: Enable the vnet_hdr_support by
> > >> default
> > >>
> > >> "Zhang, Chen" <chen.zhang@intel.com> writes:
> > >>
> > >> >> -----Original Message-----
> > >> >> From: Markus Armbruster <armbru@redhat.com>
> > >> >> Sent: Wednesday, November 10, 2021 1:07 PM
> > >> >> To: Zhang, Chen <chen.zhang@intel.com>
> > >> >> Cc: Jason Wang <jasowang@redhat.com>; qemu-dev <qemu-
> > >> >> devel@nongnu.org>; Li Zhijian <lizhijian@cn.fujitsu.com>
> > >> >> Subject: Re: [PATCH] net/filter: Enable the vnet_hdr_support by
> > >> >> default
> > >> >>
> > >> >> Zhang Chen <chen.zhang@intel.com> writes:
> > >> >>
> > >> >> > This patch make filters and colo-compare module support
> > >> >> > vnet_hdr by default. And also support -device non-virtio-net(like
> e1000.).
> > >> >> > But it can't avoid user manual configuration error between
> > >> >> > different filters when enable/disable virtio-net-pci.
> > >> >> >
> > >> >> > Signed-off-by: Zhang Chen <chen.zhang@intel.com>
> > >> >>
> > >> >> Have you considered backward compatibility?  Can it break usage
> > >> >> that now works?
> > >> >
> > >> > Yes, this patch fully guarantees the compatibility as Jason's comments.
> > >> > Original usage still works.
> > >>
> > >> Worth a brief explanation in the commit message?
> > >
> > > OK. Add following statement to commit message:
> > > This patch make filters and colo-compare module support vnet_hdr by
> > > default. And also support -device non-virtio-net(like e1000.).
> > > Because when enabled the support will make the vnet_hdr_len field
> > > become must-delivery part of filter transfer protocol(even 0 in use
> > > -device e1000). It fully guarantees the compatibility for management
> layer like libvirt.
> > > But it still can't avoid user manual configuration error between
> > > different filters connected when enable/disable vnet_hdr_support.
> > >
> > > How about this explanation?
> >
> > I'm deferring to Jason, because I can't judge this for technical
> > accuracy.
> 
> I think it should be fine.

OK, I will update the commit message.

Thanks
Chen

> 
> Thanks
> 
> >
> > > By the way, please let me know your comments on filter passthrough
> series:
> > > https://mail.gnu.org/archive/html/qemu-devel/2021-08/msg01393.html
> > > If OK, I will update it.
> >
> > Uh, I was under the impression that you'd respin with my comments
> > addressed as per your reply to my review.
> >
> > It's too late for 6.2 now.  Suggest to respin, and adjust the "since:"
> > tags to 7.0.
> >