From a609f5b17dcead4b7d0e108a00efcdd99a2be385 Mon Sep 17 00:00:00 2001
From: Tobias Jungel <tobias.jungel@bisdn.de>
Date: Tue, 13 Sep 2016 09:14:20 +0200
Subject: [PATCH] add trustGuestRxFilters attribute to public interface

set :trust_guest_rx_filters => true in the network definition to enable
trustGuestRxFilters for the public interface.

Details from http://www.libvirt.org/formatdomain.html#elementsNICSDirect:
"If the model type is set to virtio and interface's trustGuestRxFilters
attribute is set to yes, changes made to the interface mac address,
unicast/multicast receive filters, and vlan settings in the guest will
be monitored and propagated to the associated macvtap device on the host
(Since 1.2.10). If trustGuestRxFilters is not set, or is not supported
for the device model in use, an attempted change to the mac address
originating from the guest side will result in a non-working network
connection."

closes #650
---
 README.md                                               | 3 +++
 lib/vagrant-libvirt/action/create_network_interfaces.rb | 1 +
 lib/vagrant-libvirt/templates/public_interface.xml.erb  | 2 +-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 6b12256..1d8e8e5 100644
--- a/README.md
+++ b/README.md
@@ -546,6 +546,9 @@ virtual network.
 * `:portgroup` - Name of libvirt portgroup to connect to.
 * `:ovs` - Support to connect to an Open vSwitch bridge device. Default is
   'false'.
+* `:trust_guest_rx_filters` - Support trustGuestRxFilters attribute. Details
+  are listed [here](http://www.libvirt.org/formatdomain.html#elementsNICSDirect).
+  Default is 'false'.
 
 ### Management Network
 
diff --git a/lib/vagrant-libvirt/action/create_network_interfaces.rb b/lib/vagrant-libvirt/action/create_network_interfaces.rb
index 9915db6..e5dc6dc 100644
--- a/lib/vagrant-libvirt/action/create_network_interfaces.rb
+++ b/lib/vagrant-libvirt/action/create_network_interfaces.rb
@@ -82,6 +82,7 @@ module VagrantPlugins
               template_name = 'public_interface'
               @logger.info("Setting up public interface using device #{@device} in mode #{@mode}")
               @ovs = iface_configuration.fetch(:ovs, false)
+              @trust_guest_rx_filters = iface_configuration.fetch(:trust_guest_rx_filters, false)
             # configuration for udp or tcp tunnel interfaces (p2p conn btwn guest OSes)
             elsif iface_configuration.fetch(:tunnel_type, nil)
               @type = iface_configuration.fetch(:tunnel_type)
diff --git a/lib/vagrant-libvirt/templates/public_interface.xml.erb b/lib/vagrant-libvirt/templates/public_interface.xml.erb
index 7f99e49..3f0d3e1 100644
--- a/lib/vagrant-libvirt/templates/public_interface.xml.erb
+++ b/lib/vagrant-libvirt/templates/public_interface.xml.erb
@@ -1,4 +1,4 @@
-<interface type='<%= @type %>'>
+<interface type='<%= @type %>'<% if @trust_guest_rx_filters %> trustGuestRxFilters='yes'<% end %>>
   <% if @mac %>
   <mac address='<%= @mac %>'/>
   <% end %>