[libvirt] [PATCH v2] qemu: handle multicast overflow on macvtap NIC_RX_FILTER_CHANGED

[Michal Privoznik]

On 12/3/18 1:52 PM, Michal Privoznik wrote:
> On 11/30/18 6:50 PM, Jason Baron wrote:
>> Guest network devices can set 'overflow' when there are a number of multicast
>> ips configured. For virtio_net, the limit is only 64. In this case, the list
>> of mac addresses is empty and the 'overflow' condition is set. Thus, the guest
>> will currently receive no multicast traffic in this state.
>>
>> When 'overflow' is set in the guest, let's turn this into ALLMULTI on the host.
>>
>> Signed-off-by: Jason Baron <jbaron at akamai.com>
>> ---
>> v1->v2:
>>  1. check for < 0 in virNetDevSetRcvAllMulti() (Michal Privoznik)
>>  2. restrict overflow check to VIR_NETDEV_RX_FILTER_MODE_NORMAL mode as to
>>     avoid unnecessarily calling rx filter updates for other modes 
>>  3. update virNetDevSetRcvAllMulti() call to use guestFilter->multicast.overflow
>>     directly (Michal Privoznik)
>>
>>  src/qemu/qemu_driver.c | 22 +++++++++++++++-------
>>  1 file changed, 15 insertions(+), 7 deletions(-)
> 
> ACK
> 

Huh, the release happened as I was reviewing this. This is now merged.

Congratulations on your first libvirt contribution!

Michal