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Hi,

SRIOV is under implementation in nova and neutron. Did you have a look to :
https://wiki.openstack.org/wiki/PCI_passthrough_SRIOV_support
https://blueprints.launchpad.net/neutron/+spec/ml2-binding-profile
https://blueprints.launchpad.net/neutron/+spec/ml2-request-vnic-type
https://blueprints.launchpad.net/nova/+spec/pci-passthrough-sriov


On Mon, Feb 10, 2014 at 7:27 AM, Isaku Yamahata
<isaku.yamahata at gmail.com> wrote:
> On Sat, Feb 08, 2014 at 03:49:46AM +0000,
> "Yang, Yi Y" <yi.y.yang at intel.com> wrote:
>
>> Hi, All
>
> Hi.
>
>
>> I want to write a new neutron L2 plugin using ML2 framework, I noticed openvswitch and linxubridge have been ported into ML2 framework, but it seems many code is removed compared to standalone L2 plugin, I guess some code has been written into a common library. Now I want to write a L2 plugin to enable switch for a SR-IOV 10g NIC, I think I need to write as follows:
>

having such a feature would be awesome : did you fill a BP for that?

>
>> 1. a new mechanism driver neutron/plugins/ml2/drivers/mech_XXX.py, but from source code, it seems nothing to do.

You mean, you want to use AgentMechanismDriverBase directly? this is
an abstract class du to check_segment_for_agent method.

>
> This requires to define how your plugin utilize network.
> If multi tenant network is wanted, what/how technology will be used.
> The common one is VLAN or tunneling(GRE, VXLAN).
> This depends on what feature your NIC supports.
>

>> 2. a new agent neutron/plugins/XXX/ XXX_neutron_plugin.py

I don't know if this would be mandatory. May be you can just add
necessary informations with extend_port_dict while your MD bind the
port, as proposed by this patch :
https://review.openstack.org/#/c/69783/

Nova will then configure the port correctly. The only need for an
agent would be to populate the agent DB with supported segment types,
so that during bind_port, the MD find an appropriate segment (with
check_segment_for_agent).

>>
>> After this, an issue it how to let neutron know it and load it by default or by configuration. Debugging is also an issue, nobody can write code correctly once :-),  does neutron have any good debugging way for a newbie?
>
> LOG.debug and debug middle ware.
> If there are any other better way, I'd also like to know.
>
> thanks,
>
>> I'm very eager to be able to get your help and sincerely thank you in advance.
>>
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>
> --
> Isaku Yamahata <isaku.yamahata at gmail.com>
>
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