conf: reimplement virDomainNetResolveActualType in terms of public API

Now that we have the ability to easily open connections to secondary
drivers, eg network:///system,  it is possible to reimplement the
virDomainNetResolveActualType method in terms of the public API. This
avoids the need to have the network driver provide a callback for it.

Reviewed-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

src/conf/domain_conf.c

@@ -28926,7 +28926,6 @@ static virDomainNetNotifyActualDeviceImpl netNotify;
 static virDomainNetReleaseActualDeviceImpl netRelease;
 static virDomainNetBandwidthChangeAllowedImpl netBandwidthChangeAllowed;
 static virDomainNetBandwidthUpdateImpl netBandwidthUpdate;
-static virDomainNetResolveActualTypeImpl netResolveActualType;
 
 
 void
@@ -28934,15 +28933,13 @@ virDomainNetSetDeviceImpl(virDomainNetAllocateActualDeviceImpl allocate,
                           virDomainNetNotifyActualDeviceImpl notify,
                           virDomainNetReleaseActualDeviceImpl release,
                           virDomainNetBandwidthChangeAllowedImpl bandwidthChangeAllowed,
-                          virDomainNetBandwidthUpdateImpl bandwidthUpdate,
+                          virDomainNetBandwidthUpdateImpl bandwidthUpdate)
-                          virDomainNetResolveActualTypeImpl resolveActualType)
 {
     netAllocate = allocate;
     netNotify = notify;
     netRelease = release;
     netBandwidthChangeAllowed = bandwidthChangeAllowed;
     netBandwidthUpdate = bandwidthUpdate;
-    netResolveActualType = resolveActualType;
 }
 
 int
@@ -29011,16 +29008,83 @@ virDomainNetBandwidthUpdate(virDomainNetDefPtr iface,
     return netBandwidthUpdate(iface, newBandwidth);
 }
 
+/* virDomainNetResolveActualType:
+ * @iface: the original NetDef from the domain
+ *
+ * Looks up the network reference by iface, and returns the actual
+ * type of the connection without allocating any resources.
+ *
+ * Returns 0 on success, -1 on failure.
+ */
 int
 virDomainNetResolveActualType(virDomainNetDefPtr iface)
 {
-    if (!netResolveActualType) {
+    virConnectPtr conn = NULL;
-        virReportError(VIR_ERR_NO_SUPPORT, "%s",
+    virNetworkPtr net = NULL;
-                       _("Network device resolve type not available"));
+    char *xml = NULL;
+    virNetworkDefPtr def = NULL;
+    int ret = -1;
+
+    if (iface->type != VIR_DOMAIN_NET_TYPE_NETWORK)
+        return iface->type;
+
+    if (iface->data.network.actual)
+        return iface->data.network.actual->type;
+
+    if (!(conn = virGetConnectNetwork()))
         return -1;
+
+    if (!(net = virNetworkLookupByName(conn, iface->data.network.name)))
+        goto cleanup;
+
+    if (!(xml = virNetworkGetXMLDesc(net, 0)))
+        goto cleanup;
+
+    if (!(def = virNetworkDefParseString(xml)))
+        goto cleanup;
+
+    if ((def->forward.type == VIR_NETWORK_FORWARD_NONE) ||
+        (def->forward.type == VIR_NETWORK_FORWARD_NAT) ||
+        (def->forward.type == VIR_NETWORK_FORWARD_ROUTE) ||
+        (def->forward.type == VIR_NETWORK_FORWARD_OPEN)) {
+        /* for these forward types, the actual net type really *is*
+         * NETWORK; we just keep the info from the portgroup in
+         * iface->data.network.actual
+         */
+        ret = VIR_DOMAIN_NET_TYPE_NETWORK;
+
+    } else if ((def->forward.type == VIR_NETWORK_FORWARD_BRIDGE) &&
+               def->bridge) {
+
+        /* <forward type='bridge'/> <bridge name='xxx'/>
+         * is VIR_DOMAIN_NET_TYPE_BRIDGE
+         */
+
+        ret = VIR_DOMAIN_NET_TYPE_BRIDGE;
+
+    } else if (def->forward.type == VIR_NETWORK_FORWARD_HOSTDEV) {
+
+        ret = VIR_DOMAIN_NET_TYPE_HOSTDEV;
+
+    } else if ((def->forward.type == VIR_NETWORK_FORWARD_BRIDGE) ||
+               (def->forward.type == VIR_NETWORK_FORWARD_PRIVATE) ||
+               (def->forward.type == VIR_NETWORK_FORWARD_VEPA) ||
+               (def->forward.type == VIR_NETWORK_FORWARD_PASSTHROUGH)) {
+
+        /* <forward type='bridge|private|vepa|passthrough'> are all
+         * VIR_DOMAIN_NET_TYPE_DIRECT.
+         */
+
+        ret = VIR_DOMAIN_NET_TYPE_DIRECT;
+
     }
 
-    return netResolveActualType(iface);
+ cleanup:
+    virNetworkDefFree(def);
+    VIR_FREE(xml);
+    virObjectUnref(conn);
+    virObjectUnref(net);
+    return ret;
 }
 
 

src/conf/domain_conf.h

@@ -3474,17 +3474,13 @@ typedef int
 (*virDomainNetBandwidthUpdateImpl)(virDomainNetDefPtr iface,
                                    virNetDevBandwidthPtr newBandwidth);
 
-typedef int
-(*virDomainNetResolveActualTypeImpl)(virDomainNetDefPtr iface);
-
 
 void
 virDomainNetSetDeviceImpl(virDomainNetAllocateActualDeviceImpl allocate,
                           virDomainNetNotifyActualDeviceImpl notify,
                           virDomainNetReleaseActualDeviceImpl release,
                           virDomainNetBandwidthChangeAllowedImpl bandwidthChangeAllowed,
-                          virDomainNetBandwidthUpdateImpl bandwidthUpdate,
+                          virDomainNetBandwidthUpdateImpl bandwidthUpdate);
-                          virDomainNetResolveActualTypeImpl resolveActualType);
 
 int
 virDomainNetAllocateActualDevice(virDomainDefPtr dom,
@@ -3511,11 +3507,6 @@ virDomainNetBandwidthUpdate(virDomainNetDefPtr iface,
                             virNetDevBandwidthPtr newBandwidth)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
 
-/* XXX this is a nasty hack and should be removed. It should
- * be by via public API by fetching XML and parsing it. Not
- * easy right now as code paths in QEMU reying on this don't
- * have a virConnectPtr handy.
- */
 int
 virDomainNetResolveActualType(virDomainNetDefPtr iface)
     ATTRIBUTE_NONNULL(1);

src/network/bridge_driver.c

@@ -5146,79 +5146,6 @@ networkReleaseActualDevice(virDomainDefPtr dom,
 }
 
 
-
-/* networkResolveActualType:
- * @iface: the original NetDef from the domain
- *
- * Looks up the network reference by iface, and returns the actual
- * type of the connection without allocating any resources.
- *
- * Returns 0 on success, -1 on failure.
- */
-static int
-networkResolveActualType(virDomainNetDefPtr iface)
-{
-    virNetworkDriverStatePtr driver = networkGetDriver();
-    virNetworkObjPtr obj = NULL;
-    virNetworkDefPtr netdef = NULL;
-    int ret = -1;
-
-    if (!driver || iface->type != VIR_DOMAIN_NET_TYPE_NETWORK)
-        return iface->type;
-
-    if (iface->data.network.actual)
-        return iface->data.network.actual->type;
-
-    obj = virNetworkObjFindByName(driver->networks, iface->data.network.name);
-    if (!obj) {
-        virReportError(VIR_ERR_NO_NETWORK,
-                       _("no network with matching name '%s'"),
-                       iface->data.network.name);
-        return -1;
-    }
-    netdef = virNetworkObjGetDef(obj);
-
-    if ((netdef->forward.type == VIR_NETWORK_FORWARD_NONE) ||
-        (netdef->forward.type == VIR_NETWORK_FORWARD_NAT) ||
-        (netdef->forward.type == VIR_NETWORK_FORWARD_ROUTE) ||
-        (netdef->forward.type == VIR_NETWORK_FORWARD_OPEN)) {
-        /* for these forward types, the actual net type really *is*
-         * NETWORK; we just keep the info from the portgroup in
-         * iface->data.network.actual
-         */
-        ret = VIR_DOMAIN_NET_TYPE_NETWORK;
-
-    } else if ((netdef->forward.type == VIR_NETWORK_FORWARD_BRIDGE) &&
-               netdef->bridge) {
-
-        /* <forward type='bridge'/> <bridge name='xxx'/>
-         * is VIR_DOMAIN_NET_TYPE_BRIDGE
-         */
-
-        ret = VIR_DOMAIN_NET_TYPE_BRIDGE;
-
-    } else if (netdef->forward.type == VIR_NETWORK_FORWARD_HOSTDEV) {
-
-        ret = VIR_DOMAIN_NET_TYPE_HOSTDEV;
-
-    } else if ((netdef->forward.type == VIR_NETWORK_FORWARD_BRIDGE) ||
-               (netdef->forward.type == VIR_NETWORK_FORWARD_PRIVATE) ||
-               (netdef->forward.type == VIR_NETWORK_FORWARD_VEPA) ||
-               (netdef->forward.type == VIR_NETWORK_FORWARD_PASSTHROUGH)) {
-
-        /* <forward type='bridge|private|vepa|passthrough'> are all
-         * VIR_DOMAIN_NET_TYPE_DIRECT.
-         */
-
-        ret = VIR_DOMAIN_NET_TYPE_DIRECT;
-
-    }
-
-    virNetworkObjEndAPI(&obj);
-    return ret;
-}
-
-
 /**
  * networkCheckBandwidth:
  * @net: network QoS
@@ -5717,8 +5644,7 @@ networkRegister(void)
         networkNotifyActualDevice,
         networkReleaseActualDevice,
         networkBandwidthChangeAllowed,
-        networkBandwidthUpdate,
+        networkBandwidthUpdate);
-        networkResolveActualType);
 
     return 0;
 }

tests/Makefile.am

@@ -280,7 +280,7 @@ test_libraries += virmocklibxl.la
 endif WITH_LIBXL
 
 if WITH_QEMU
-test_programs += qemuxml2xmltest \
+test_programs += qemuxml2argvtest qemuxml2xmltest \
 	qemuargv2xmltest qemuhelptest domainsnapshotxml2xmltest \
 	qemumonitortest qemumonitorjsontest qemuhotplugtest \
 	qemuagenttest qemucapabilitiestest qemucaps2xmltest \
@@ -288,11 +288,6 @@ test_programs += qemuxml2xmltest \
 	qemucommandutiltest \
 	qemublocktest \
 	$(NULL)
-if WITH_NETWORK
-# Dep on the network driver callback for resolving NIC
-# actual type. XXX remove this dep.
-test_programs += qemuxml2argvtest
-endif WITH_NETWORK
 test_helpers += qemucapsprobe
 test_libraries += libqemumonitortestutils.la \
 		libqemutestdriver.la \