fix network add and change methods to handle bridge/mavctap differentation correctly.

instances/views.py

@@ -25,6 +25,7 @@ from logs.views import addlogmsg
 from vrtManager import util
 from vrtManager.create import wvmCreate
 from vrtManager.instance import wvmInstances
+from vrtManager.interface import wvmInterface
 from vrtManager.storage import wvmStorage
 from vrtManager.util import randomPasswd
 
@@ -121,6 +122,7 @@ def instance(request, pk):
     memory_host = instance.proxy.get_max_memory()
     bus_host = instance.proxy.get_disk_bus_types(instance.arch, instance.machine)
     networks_host = sorted(instance.proxy.get_networks())
+    interfaces_host = sorted(instance.proxy.get_ifaces())
     nwfilters_host = instance.proxy.get_nwfilters()
     storages_host = sorted(instance.proxy.get_storages(True))
     net_models_host = instance.proxy.get_network_models()
@@ -904,6 +906,16 @@ def change_network(request, pk):
             (source, source_type) = utils.get_network_tuple(request.POST.get(post))
             network_data[post] = source
             network_data[post + "-type"] = source_type
+
+            if source_type == 'iface':
+                iface = wvmInterface(
+                    instance.compute.hostname,
+                    instance.compute.login,
+                    instance.compute.password,
+                    instance.compute.type,
+                    source,
+                )
+                network_data[post + "-type"] = iface.get_type()
         elif post.startswith("net-"):
             network_data[post] = request.POST.get(post, "")
 
@@ -923,6 +935,16 @@ def add_network(request, pk):
     nwfilter = request.POST.get("add-net-nwfilter")
     (source, source_type) = utils.get_network_tuple(request.POST.get("add-net-network"))
 
+    if source_type == 'iface':
+        iface = wvmInterface(
+                instance.compute.hostname,
+                instance.compute.login,
+                instance.compute.password,
+                instance.compute.type,
+                source,
+            )
+        source_type = iface.get_type()
+
     instance.proxy.add_network(mac, source, source_type, nwfilter=nwfilter)
     msg = _("Add network: %(mac)s") % {"mac": mac}
     addlogmsg(request.user.username, instance.name, msg)

vrtManager/instance.py

@@ -1366,19 +1366,15 @@ class wvmInstance(wvmConnect):
         return bridge_name
 
     def add_network(self, mac_address, source, source_type="net", model="virtio", nwfilter=None):
-        forward_mode = ""
-        if source_type != "iface":
-            forward_mode = self.get_network_forward(source)
             
-        if forward_mode in ["nat", "isolated", "routed"]:
+        if source_type == "net":
             interface_type = "network"
-        elif forward_mode == "":
-            interface_type = "direct"
-        else:
-            if self.get_bridge_name(source, source_type) is None:
-                interface_type = "network"
-            else:
+        elif source_type == "bridge":
             interface_type = "bridge"
+        else:
+            interface_type = "direct"
+       
+        # network modes not handled: default is bridge
 
         xml_iface = f"""
           <interface type='{interface_type}'>
@@ -1386,13 +1382,11 @@ class wvmInstance(wvmConnect):
         if interface_type == "network":
             xml_iface += f"""<source network='{source}'/>"""
         elif interface_type == "direct":
-            if source_type == "net":
-                xml_iface += f"""<source network='{source}' mode='bridge'/>"""
-            else:
             xml_iface += f"""<source dev='{source}' mode='bridge'/>"""
+        elif interface_type == "bridge":
+            xml_iface += f"""<source bridge='{source}'/>"""
         else:
-            bridge_name = self.get_bridge_name(source, source_type)
-            xml_iface += f"""<source bridge='{bridge_name}'/>"""
+            raise libvirtError(f"'{interface_type}' is an unexpected interface type.")
         xml_iface += f"""<model type='{model}'/>"""
         if nwfilter:
             xml_iface += f"""<filterref filter='{nwfilter}'/>"""
@@ -1416,8 +1410,35 @@ class wvmInstance(wvmConnect):
                     self.instance.detachDeviceFlags(new_xml, VIR_DOMAIN_AFFECT_CONFIG)
                 if self.get_status() == 5:
                     self.instance.detachDeviceFlags(new_xml, VIR_DOMAIN_AFFECT_CONFIG)
+                return new_xml
+        return None
 
     def change_network(self, network_data):
+        net_mac = network_data.get("net-mac-0")
+        net_source = network_data.get("net-source-0")
+        net_source_type = network_data.get("net-source-0-type")
+        net_filter = network_data.get("net-nwfilter-0")
+        net_model = network_data.get("net-model-0")
+        
+        # Remove interface first, but keep network interface XML definition
+        # If there is an error happened while adding changed one, then add removed one to back.
+        status = self.delete_network(net_mac)
+        try:
+            self.add_network(net_mac, net_source, net_source_type, net_model, net_filter)
+        except libvirtError:
+            if status is not None:
+                if self.get_status() == 1:
+                    self.instance.attachDeviceFlags(status, VIR_DOMAIN_AFFECT_LIVE)
+                    self.instance.attachDeviceFlags(status, VIR_DOMAIN_AFFECT_CONFIG)
+                if self.get_status() == 5:
+                    self.instance.attachDeviceFlags(status, VIR_DOMAIN_AFFECT_CONFIG)
+
+
+    def change_network_oldway(self, network_data):
+        '''
+            change network firsh version...
+            will be removed if new one works as expected for all scenarios
+        '''
         xml = self._XMLDesc(VIR_DOMAIN_XML_SECURE)
         tree = ElementTree.fromstring(xml)
         for num, interface in enumerate(tree.findall("devices/interface")):