Add support for event tray moved of removable disks

This patch introduces a new event type for the QMP event
DEVICE_TRAY_MOVED, which occurs when the tray of a removable
disk is moved (i.e opened or closed):

    VIR_DOMAIN_EVENT_ID_TRAY_CHANGE

The event's data includes the device alias and the reason
for tray status' changing, which indicates why the tray
status was changed. Thus the callback definition for the event
is:

enum {
    VIR_DOMAIN_EVENT_TRAY_CHANGE_OPEN = 0,
    VIR_DOMAIN_EVENT_TRAY_CHANGE_CLOSE,

\#ifdef VIR_ENUM_SENTINELS
    VIR_DOMAIN_EVENT_TRAY_CHANGE_LAST
\#endif
} virDomainEventTrayChangeReason;

typedef void
(*virConnectDomainEventTrayChangeCallback)(virConnectPtr conn,
                                           virDomainPtr dom,
                                           const char *devAlias,
                                           int reason,
                                           void *opaque);

2 files changed, 60 insertions, 0 deletions

diff --git a/python/libvirt-override-virConnect.py b/python/libvirt-override-virConnect.py
index b908b32df..82c243719 100644
--- a/python/libvirt-override-virConnect.py
+++ b/python/libvirt-override-virConnect.py
@@ -134,6 +134,16 @@
         cb(self, virDomain(self, _obj=dom), oldSrcPath, newSrcPath, devAlias, reason, opaque)
         return 0;
 
+    def _dispatchDomainEventTrayChangeCallback(self, dom, devAlias, reason, cbData):
+        """Dispatches event to python user domain trayChange event callbacks
+        """
+        cb = cbData["cb"]
+        opaque = cbData["opaque"]
+
+        cb(self, virDomain(self, _obj=dom), devAlias, reason, opaque)
+        return 0;
+
+
     def domainEventDeregisterAny(self, callbackID):
         """Removes a Domain Event Callback. De-registering for a
            domain callback will disable delivery of this event type """
diff --git a/python/libvirt-override.c b/python/libvirt-override.c
index 129f29c7b..42a441e39 100644
--- a/python/libvirt-override.c
+++ b/python/libvirt-override.c
@@ -5105,6 +5105,53 @@ libvirt_virConnectDomainEventDiskChangeCallback(virConnectPtr conn ATTRIBUTE_UNU
     return ret;
 }
 
+static int
+libvirt_virConnectDomainEventTrayChangeCallback(virConnectPtr conn ATTRIBUTE_UNUSED,
+                                                virDomainPtr dom,
+                                                const char *devAlias,
+                                                int reason,
+                                                void *opaque)
+{
+    PyObject *pyobj_cbData = (PyObject*)opaque;
+    PyObject *pyobj_dom;
+    PyObject *pyobj_ret;
+    PyObject *pyobj_conn;
+    PyObject *dictKey;
+    int ret = -1;
+
+    LIBVIRT_ENSURE_THREAD_STATE;
+    /* Create a python instance of this virDomainPtr */
+    virDomainRef(dom);
+
+    pyobj_dom = libvirt_virDomainPtrWrap(dom);
+    Py_INCREF(pyobj_cbData);
+
+    dictKey = libvirt_constcharPtrWrap("conn");
+    pyobj_conn = PyDict_GetItem(pyobj_cbData, dictKey);
+    Py_DECREF(dictKey);
+
+    /* Call the Callback Dispatcher */
+    pyobj_ret = PyObject_CallMethod(pyobj_conn,
+                                    (char*)"_dispatchDomainEventTrayChangeCallback",
+                                    (char*)"OsiO",
+                                    pyobj_dom,
+                                    devAlias, reason, pyobj_cbData);
+
+    Py_DECREF(pyobj_cbData);
+    Py_DECREF(pyobj_dom);
+
+    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;
+}
+
 static PyObject *
 libvirt_virConnectDomainEventRegisterAny(ATTRIBUTE_UNUSED PyObject * self,
                                          PyObject * args)
@@ -5165,6 +5212,9 @@ libvirt_virConnectDomainEventRegisterAny(ATTRIBUTE_UNUSED PyObject * self,
     case VIR_DOMAIN_EVENT_ID_DISK_CHANGE:
         cb = VIR_DOMAIN_EVENT_CALLBACK(libvirt_virConnectDomainEventDiskChangeCallback);
         break;
+    case VIR_DOMAIN_EVENT_ID_TRAY_CHANGE:
+        cb = VIR_DOMAIN_EVENT_CALLBACK(libvirt_virConnectDomainEventTrayChangeCallback);
+        break;
     }
 
     if (!cb) {