Add support for memory failure event callbacks

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

examples/event-test.py

@@ -636,6 +636,10 @@ def myDomainEventBlockThresholdCallback(conn: libvirt.virConnect, dom: libvirt.v
     print("myDomainEventBlockThresholdCallback: Domain %s(%s) block device %s(%s) threshold %d exceeded by %d" % (
         dom.name(), dom.ID(), dev, path, threshold, excess))
 
+def myDomainEventMemoryFailureCallback(conn: libvirt.virConnect, dom: libvirt.virDomain, recipient: int, action: int, flags: int, opaque: _T) -> None:
+    print("myDomainEventMemoryFailureCallback: Domain %s(%s) memory failure recipient %d action %d flags %d" % (
+        dom.name(), dom.ID(), recipient, action, flags))
+
 
 ##########################################################################
 # Network events
@@ -788,6 +792,7 @@ def main() -> None:
         vc.domainEventRegisterAny(None, libvirt.VIR_DOMAIN_EVENT_ID_DEVICE_REMOVAL_FAILED, myDomainEventDeviceRemovalFailedCallback, None),
         vc.domainEventRegisterAny(None, libvirt.VIR_DOMAIN_EVENT_ID_METADATA_CHANGE, myDomainEventMetadataChangeCallback, None),
         vc.domainEventRegisterAny(None, libvirt.VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD, myDomainEventBlockThresholdCallback, None),
+        vc.domainEventRegisterAny(None, libvirt.VIR_DOMAIN_EVENT_ID_MEMORY_FAILURE, myDomainEventMemoryFailureCallback, None),
     ]
 
     netcallbacks = [

libvirt-override-virConnect.py

@@ -261,6 +261,15 @@
         cb(self, virDomain(self, _obj=dom), dev, path, threshold, excess, opaque)
         return 0
 
+    def _dispatchDomainEventMemoryFailureCallback(self, dom: 'virDomain', recipient: int, action: int, flags: int, cbData: Dict[str, Any]) -> int:
+        """Dispatches event to python user domain memory failure event callbacks
+        """
+        cb = cbData["cb"]
+        opaque = cbData["opaque"]
+
+        cb(self, virDomain(self, _obj=dom), recipient, action, flags, opaque)
+        return 0
+
     def domainEventDeregisterAny(self, callbackID: int) -> None:
         """Removes a Domain Event Callback. De-registering for a
            domain callback will disable delivery of this event type """

libvirt-override.c

@@ -7254,6 +7254,62 @@ libvirt_virConnectDomainEventBlockThresholdCallback(virConnectPtr conn ATTRIBUTE
 #endif /* VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD */
 
 
+#ifdef VIR_DOMAIN_EVENT_ID_MEMORY_FAILURE
+static int
+libvirt_virConnectDomainEventMemoryFailureCallback(virConnectPtr conn ATTRIBUTE_UNUSED,
+                                                   virDomainPtr dom,
+                                                   int recipient,
+                                                   int action,
+                                                   unsigned int flags,
+                                                   void *opaque)
+{
+    PyObject *pyobj_cbData = (PyObject*)opaque;
+    PyObject *pyobj_dom;
+    PyObject *pyobj_ret = NULL;
+    PyObject *pyobj_conn;
+    PyObject *dictKey;
+    int ret = -1;
+
+    LIBVIRT_ENSURE_THREAD_STATE;
+
+    if (!(dictKey = libvirt_constcharPtrWrap("conn")))
+        goto cleanup;
+    pyobj_conn = PyDict_GetItem(pyobj_cbData, dictKey);
+    Py_DECREF(dictKey);
+
+    /* Create a python instance of this virDomainPtr */
+    virDomainRef(dom);
+    if (!(pyobj_dom = libvirt_virDomainPtrWrap(dom))) {
+        virDomainFree(dom);
+        goto cleanup;
+    }
+    Py_INCREF(pyobj_cbData);
+
+    /* Call the Callback Dispatcher */
+    pyobj_ret = PyObject_CallMethod(pyobj_conn,
+                                    (char*)"_dispatchDomainEventMemoryFailureCallback",
+                                    (char*)"OiiiO",
+                                    pyobj_dom, recipient, action, flags,
+                                    pyobj_cbData);
+
+    Py_DECREF(pyobj_cbData);
+    Py_DECREF(pyobj_dom);
+
+ cleanup:
+    if (!pyobj_ret) {
+        DEBUG("%s - ret:%p\n", __FUNCTION__, pyobj_ret);
+        PyErr_Print();
+    } else {
+        Py_DECREF(pyobj_ret);
+        ret = 0;
+    }
+
+    LIBVIRT_RELEASE_THREAD_STATE;
+    return ret;
+}
+#endif /* VIR_DOMAIN_EVENT_ID_MEMORY_FAILURE */
+
+
 static PyObject *
 libvirt_virConnectDomainEventRegisterAny(PyObject *self ATTRIBUTE_UNUSED,
                                          PyObject *args)
@@ -7379,6 +7435,11 @@ libvirt_virConnectDomainEventRegisterAny(PyObject *self ATTRIBUTE_UNUSED,
         cb = VIR_DOMAIN_EVENT_CALLBACK(libvirt_virConnectDomainEventBlockThresholdCallback);
         break;
 #endif /* VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD */
+#ifdef VIR_DOMAIN_EVENT_ID_MEMORY_FAILURE
+    case VIR_DOMAIN_EVENT_ID_MEMORY_FAILURE:
+        cb = VIR_DOMAIN_EVENT_CALLBACK(libvirt_virConnectDomainEventMemoryFailureCallback);
+        break;
+#endif /* VIR_DOMAIN_EVENT_ID_MEMORY_FAILURE */
     case VIR_DOMAIN_EVENT_ID_LAST:
         break;
     }