Since I don't have the original email to reply-to for a code review, here is a link: https://www.redhat.com/archives/libvirt-cim/2012-December/msg00030.html NACK As previously noted, a script is supported (and perhaps required) in the Xen guest. Consider the following, which adds a parameter to the call in order to allow for Xen: -static const char *bridge_net_to_xml(xmlNodePtr nic, struct net_device *dev) +static const char *bridge_net_to_xml(xmlNodePtr nic, struct net_device *dev, + int domtype) { const char *script = "vif-bridge"; xmlNodePtr tmp; const char *msg = NULL; - tmp = xmlNewChild(nic, NULL, BAD_CAST "script", NULL); - if (tmp == NULL) - return XML_ERROR; - xmlNewProp(tmp, BAD_CAST "path", BAD_CAST script); + /* Scripts only supported on Xen guests see 'libvirt' + * commit id 1734cdb99 (since 0.9.10) */ + if (domtype == DOMAIN_XENPV || domtype == DOMAIN_XENFV) { + tmp = xmlNewChild(nic, NULL, BAD_CAST "script", NULL); + if (tmp == NULL) + return XML_ERROR; + xmlNewProp(tmp, BAD_CAST "path", BAD_CAST script); + } msg = set_net_source(nic, dev, "bridge"); @@ -375,13 +380,13 @@ static const char *net_xml(xmlNodePtr root, struct domain } #endif - if (STREQ(dev->dev.net.type, "network")) + if (STREQ(dev->dev.net.type, "network")) { msg = set_net_source(nic, net, "network"); - else if (STREQ(dev->dev.net.type, "bridge")) - msg = bridge_net_to_xml(nic, net); - else if (STREQ(dev->dev.net.type, "user")) + } else if (STREQ(dev->dev.net.type, "bridge")) { + msg = bridge_net_to_xml(nic, net, dominfo->type); + } else if (STREQ(dev->dev.net.type, "user")) { continue; - else if (STREQ(dev->dev.net.type, "direct")) { + } else if (STREQ(dev->dev.net.type, "direct")) { msg = set_net_source(nic, net, "direct"); if (net->vsi.vsi_type != NULL) { struct vsi_device *vsi = &dev->dev.net.vsi;