Re: [net-next-2.6 PATCH 0/3 RFC] macvlan: MAC Address filtering support for passthru mode

On 9/11/11 2:44 AM, "Michael S. Tsirkin" [off-list ref] wrote:

quoted

AFAIK, though it might maintain a single filter table space in hw, hw does
know which filter belongs to which VF. And the OS driver does not need to do
anything special. The VF driver exposes a VF netdev. And any uc/mc addresses
registered with a VF netdev are registered with the hw by the driver. And hw
will filter and send only pkts that the VF has expressed interest in.

No special filter partitioning in hw is required.

Thanks,
Roopa

Yes, but what I mean is, if the size of the single filter table
is limited, we need to decide how many addresses is
each guest allowed. If we let one guest ask for
as many as it wants, it can lock others out.

Yes true. In these cases ie when the number of unicast addresses being
registered is more than it can handle, The VF driver will put the VF  in
promiscuous mode (Or at least its supposed to do. I think all drivers do
that).


Thanks,
Roopa