File 0001-Always-set-model-netfront-for-xen-over-libvirt.patch of Package openstack-nova

From ce1c9b774e05ec10beab50c78edf374a6fd9b075 Mon Sep 17 00:00:00 2001
From: Tomasz Paszkowski <tpaszkowski@suse.com>
Date: Wed, 17 Jul 2013 15:47:46 +0200
Subject: [PATCH] Always set model = 'netfront' for xen over libvirt.

This will prevent emulated network driver to be attached to virtual machine.
Emulated network driver is not working for xen over libvirt as tap interface
name is suffixed by xen with '-emu' which makes this interface name too long.

Additionaly security groups will also not work for this interface as openstack
is setting up filters on interface without -emu suffix.

Change-Id: I0907ce148e473edf6b81ea782fac2fa6a1b71a2d
Fixes: bug #1202199
---
 nova/tests/virt/libvirt/test_libvirt_vif.py | 2 +-
 nova/virt/libvirt/vif.py                    | 8 +++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

Index: nova-18.2.3.dev2/nova/virt/libvirt/vif.py
===================================================================
--- nova-18.2.3.dev2.orig/nova/virt/libvirt/vif.py
+++ nova-18.2.3.dev2/nova/virt/libvirt/vif.py
@@ -137,6 +137,13 @@ class LibvirtGenericVIFDriver(object):
                 conf, mac, model, driver, vhost_queues, rx_queue_size)
             return conf
 
+        # For xen over libvirt we need to always use PV network
+        # drives as emulated ones will not work (xen suffixes them
+        # with -emu which makes interface name too long). Additionaly
+        # security groups will also not work for -emu suffixed interfaces.
+        if CONF.libvirt.virt_type == "xen":
+            model = "netfront"
+
         # If the user has specified a 'vif_model' against the
         # image then honour that model
         if image_meta: