Re: [dpdk-dev] KNI hw Address.

[Alex Markuze <alex@weka.io>]

Thanks, guys.
I think I will modify the alloc KNI API, as in the way things are
implemented today the KNI interface can't transmit because of intc MAC
spoofing (w/o hacking the data path, similar to the l2fw example). The
other issue because the interface is created with initial mac address of
0's Im pretty sure DHCP is also out of a question.

Thanks, for the detailed info.


On Thu, Jul 3, 2014 at 9:22 AM, Zhang, Helin <helin.zhang@intel.com> wrote:

>
>
> > -----Original Message-----
> > From: Padam J. Singh [mailto:padam.singh@inventum.net]
> > Sent: Thursday, July 3, 2014 1:06 PM
> > To: Zhang, Helin
> > Cc: Alex Markuze; dev@dpdk.org
> > Subject: Re: [dpdk-dev] KNI hw Address.
> >
> > Zhang, Alex,
> >
> > Please see the patch I had submitted a few days back which allows
> setting the
> > MAC address using
> >
> > ifconfig ... hw ether MAC-ADDRESS
> >
> > An "ifconfig DEV up" , followed by this sets the MAC address.
> >
> > Thanks,
> > Padam
> >
> > On 03-Jul-2014, at 10:26 am, Zhang, Helin <helin.zhang@intel.com> wrote:
> >
> > >
> > >> -----Original Message-----
> > >> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Alex Markuze
> > >> Sent: Wednesday, July 2, 2014 11:57 PM
> > >> To: dev@dpdk.org
> > >> Subject: [dpdk-dev] KNI hw Address.
> > >>
> > >> Hi, I'm playing with KNI on a VM (kvm), the Interface that is created
> > >> has no MAC address until the IP is set via ifconfig  - then a random
> mac is
> > created.
> > >> The VF has a mac address that is easily retrieved with
> > rte_eth_macaddr_get.
> > >>
> > >> What I did not find is a way to create the KNI with that specific mac
> > >> address enabled.
> > >> What are the ways to set the KNI mac address?
> > >>
> > >> Thanks
> > >> Alex
> > >
> > > Hi Alex
> > >
> > > No way without modifying the code. Two ways can be taken into account
> as
> > below.
> > >
> > > 1. Implement ndo_set_mac in KNI kernel module to set the MAC address.
> > > 2. Add mac address as one more parameters in user space KNI interface,
> to
> > tell the kernel module the mac during kni device creation.
> > >
> > > Regards,
> > > Helin
>
> Hi Padam
>
> Great! I think you have implemented the first way I listed. It is good for
> VM environments. I remember that might be adopted by some projects based on
> DPDK. Thank you!
> I will review your patch, and possibly add reviewed-by: to your patch.
>
> Regards,
> Helin
>