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[libvirt] [PATCH 2/4] event: add notion of remoteID for filtering client network events



In order to mirror a server with per-object filtering, the client
needs to track which server callbackID is servicing the client
callback.  This patch introduces the notion of a serverID, as
well as the plumbing to use it for network events, although the
actual complexity of using per-object filtering in the remote
driver is deferred to a later patch.

* src/conf/object_event.h (virObjectEventStateEventID): Add parameter.
(virObjectEventStateQueueRemote, virObjectEventStateSetRemote):
New prototypes.
(virObjectEventStateRegisterID): Move...
* src/conf/object_event_private.h: ...here, and add parameter.
(_virObjectEvent): Add field.
* src/conf/network_event.h (virNetworkEventStateRegisterClient): New
prototype.
* src/conf/object_event.c (_virObjectEventCallback): Add field.
(virObjectEventStateSetRemote): New function.
(virObjectEventStateQueue): Make wrapper around...
(virObjectEventStateQueueRemote): New function.
(virObjectEventCallbackListCount): Tweak return count when remote
id matching is used.
(virObjectEventCallbackLookup, virObjectEventStateRegisterID):
Tweak registration when remote id matching will be used.
(virObjectEventNew): Default to no remote id.
(virObjectEventCallbackListAddID): Likewise, but set remote id
when one is available.
(virObjectEventCallbackListRemoveID)
(virObjectEventCallbackListMarkDeleteID): Adjust return value when
remote id was set.
(virObjectEventStateEventID): Query existing id.
(virObjectEventDispatchMatchCallback): Require matching event id.
(virObjectEventStateCallbackID): Adjust caller.
* src/conf/network_event.c (virNetworkEventStateRegisterClient): New
function.
(virNetworkEventStateRegisterID): Update caller.
* src/conf/domain_event.c (virDomainEventStateRegister)
(virDomainEventStateRegisterID): Update callers.
* src/remote/remote_driver.c
(remoteConnectNetworkEventRegisterAny)
(remoteConnectNetworkEventDeregisterAny)
(remoteConnectDomainEventDeregisterAny): Likewise.
(remoteEventQueue): Hoist earlier to avoid forward declaration,
and add parameter.  Adjust all callers.
* src/libvirt_private.syms (conf/object_event.h): Drop function.

Signed-off-by: Eric Blake <eblake redhat com>
---
 src/conf/domain_event.c         |   4 +-
 src/conf/network_event.c        |  42 ++++++++-
 src/conf/network_event.h        |  16 +++-
 src/conf/object_event.c         | 189 ++++++++++++++++++++++++++++++++--------
 src/conf/object_event.h         |  30 ++++---
 src/conf/object_event_private.h |  15 ++++
 src/libvirt_private.syms        |   1 -
 src/remote/remote_driver.c      |  67 +++++++-------
 8 files changed, 280 insertions(+), 84 deletions(-)

diff --git a/src/conf/domain_event.c b/src/conf/domain_event.c
index 35212ef..b934cc7 100644
--- a/src/conf/domain_event.c
+++ b/src/conf/domain_event.c
@@ -1288,7 +1288,7 @@ virDomainEventStateRegister(virConnectPtr conn,
                                          virDomainEventClass,
                                          VIR_DOMAIN_EVENT_ID_LIFECYCLE,
                                          VIR_OBJECT_EVENT_CALLBACK(callback),
-                                         opaque, freecb, NULL);
+                                         opaque, freecb, NULL, false);
 }


@@ -1325,7 +1325,7 @@ virDomainEventStateRegisterID(virConnectPtr conn,
     return virObjectEventStateRegisterID(conn, state, dom ? dom->uuid : NULL,
                                          virDomainEventClass, eventID,
                                          VIR_OBJECT_EVENT_CALLBACK(cb),
-                                         opaque, freecb, callbackID);
+                                         opaque, freecb, callbackID, false);
 }


diff --git a/src/conf/network_event.c b/src/conf/network_event.c
index 3cd884d..d9c47b8 100644
--- a/src/conf/network_event.c
+++ b/src/conf/network_event.c
@@ -154,7 +154,47 @@ virNetworkEventStateRegisterID(virConnectPtr conn,
     return virObjectEventStateRegisterID(conn, state, net ? net->uuid : NULL,
                                          virNetworkEventClass, eventID,
                                          VIR_OBJECT_EVENT_CALLBACK(cb),
-                                         opaque, freecb, callbackID);
+                                         opaque, freecb, callbackID, false);
+}
+
+
+/**
+ * virNetworkEventStateRegisterClient:
+ * @conn: connection to associate with callback
+ * @state: object event state
+ * @net: network to filter on or NULL for all networks
+ * @eventID: ID of the event type to register for
+ * @cb: function to invoke when event occurs
+ * @opaque: data blob to pass to @callback
+ * @freecb: callback to free @opaque
+ * @callbackID: filled with callback ID
+ *
+ * Register the function @cb with connection @conn, from @state, for
+ * events of type @eventID, and return the registration handle in
+ * @callbackID.  This version is intended for use on the client side
+ * of RPC.
+ *
+ * Returns: the number of callbacks now registered, or -1 on error
+ */
+int
+virNetworkEventStateRegisterClient(virConnectPtr conn,
+                                   virObjectEventStatePtr state,
+                                   virNetworkPtr net,
+                                   int eventID,
+                                   virConnectNetworkEventGenericCallback cb,
+                                   void *opaque,
+                                   virFreeCallback freecb,
+                                   int *callbackID)
+{
+    if (virNetworkEventsInitialize() < 0)
+        return -1;
+
+    /* FIXME: All servers that support network events should also support
+     * per-object filtering.  */
+    return virObjectEventStateRegisterID(conn, state, net ? net->uuid : NULL,
+                                         virNetworkEventClass, eventID,
+                                         VIR_OBJECT_EVENT_CALLBACK(cb),
+                                         opaque, freecb, callbackID, false);
 }


diff --git a/src/conf/network_event.h b/src/conf/network_event.h
index 843faf9..51bd949 100644
--- a/src/conf/network_event.h
+++ b/src/conf/network_event.h
@@ -36,7 +36,21 @@ virNetworkEventStateRegisterID(virConnectPtr conn,
                                virConnectNetworkEventGenericCallback cb,
                                void *opaque,
                                virFreeCallback freecb,
-                               int *callbackID);
+                               int *callbackID)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(5)
+    ATTRIBUTE_NONNULL(8);
+
+int
+virNetworkEventStateRegisterClient(virConnectPtr conn,
+                                   virObjectEventStatePtr state,
+                                   virNetworkPtr net,
+                                   int eventID,
+                                   virConnectNetworkEventGenericCallback cb,
+                                   void *opaque,
+                                   virFreeCallback freecb,
+                                   int *callbackID)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(5)
+    ATTRIBUTE_NONNULL(8);

 virObjectEventPtr
 virNetworkEventLifecycleNew(const char *name,
diff --git a/src/conf/object_event.c b/src/conf/object_event.c
index b69387a..fa6af5c 100644
--- a/src/conf/object_event.c
+++ b/src/conf/object_event.c
@@ -66,6 +66,7 @@ struct _virObjectEventCallback {
     virClassPtr klass;
     int eventID;
     virConnectPtr conn;
+    int remoteID;
     bool uuid_filter;
     unsigned char uuid[VIR_UUID_BUFLEN];
     virConnectObjectEventGenericCallback cb;
@@ -148,19 +149,29 @@ virObjectEventCallbackListFree(virObjectEventCallbackListPtr list)
  * @cbList: the list
  * @klass: the base event class
  * @eventID: the event ID
+ * @uuid: optional uuid of per-object filtering
+ * @serverFilter: true if server supports object filtering
  *
  * Internal function to count how many callbacks remain registered for
- * the given @eventID; knowing this allows the client side of the
- * remote driver know when it must send an RPC to adjust the callbacks
- * on the server.  Note that this function intentionally ignores
- * the legacy field, since RPC calls use only a single callback on
- * the server to manage both legacy and modern domain lifecycle events.
+ * the given @eventID and @uuid; knowing this allows the client side
+ * of the remote driver know when it must send an RPC to adjust the
+ * callbacks on the server.  When @serverFilter is false, this function
+ * returns a count that includes both global and per-object callbacks,
+ * since the remote side will use a single global event to feed both.
+ * When true, the count is limited to the callbacks with the same
+ * @uuid, and where a remoteID has already been set on the callback
+ * with virObjectEventStateSetRemote().  Note that this function
+ * intentionally ignores the legacy field, since RPC calls use only a
+ * single callback on the server to manage both legacy and modern
+ * global domain lifecycle events.
  */
 static int
 virObjectEventCallbackListCount(virConnectPtr conn,
                                 virObjectEventCallbackListPtr cbList,
                                 virClassPtr klass,
-                                int eventID)
+                                int eventID,
+                                unsigned char uuid[VIR_UUID_BUFLEN],
+                                bool serverFilter)
 {
     size_t i;
     int ret = 0;
@@ -171,7 +182,12 @@ virObjectEventCallbackListCount(virConnectPtr conn,
         if (cb->klass == klass &&
             cb->eventID == eventID &&
             cb->conn == conn &&
-            !cb->deleted)
+            !cb->deleted &&
+            (!serverFilter ||
+             (cb->remoteID >= 0 &&
+              ((uuid && cb->uuid_filter &&
+                memcmp(cb->uuid, uuid, VIR_UUID_BUFLEN) == 0) ||
+               (!uuid && !cb->uuid_filter)))))
             ret++;
     }
     return ret;
@@ -196,17 +212,19 @@ virObjectEventCallbackListRemoveID(virConnectPtr conn,
         virObjectEventCallbackPtr cb = cbList->callbacks[i];

         if (cb->callbackID == callbackID && cb->conn == conn) {
-            virClassPtr klass = cb->klass;
-            int eventID = cb->eventID;
+            int ret;
+
+            ret = virObjectEventCallbackListCount(conn, cbList, cb->klass,
+                                                  cb->eventID,
+                                                  cb->uuid_filter ? cb->uuid : NULL,
+                                                  cb->remoteID >= 0) - 1;

             if (cb->freecb)
                 (*cb->freecb)(cb->opaque);
             virObjectUnref(cb->conn);
             VIR_FREE(cb);
             VIR_DELETE_ELEMENT(cbList->callbacks, i, cbList->count);
-
-            return virObjectEventCallbackListCount(conn, cbList, klass,
-                                                   eventID);
+            return ret;
         }
     }

@@ -230,7 +248,9 @@ virObjectEventCallbackListMarkDeleteID(virConnectPtr conn,
         if (cb->callbackID == callbackID && cb->conn == conn) {
             cb->deleted = true;
             return virObjectEventCallbackListCount(conn, cbList, cb->klass,
-                                                   cb->eventID);
+                                                   cb->eventID,
+                                                   cb->uuid_filter ? cb->uuid : NULL,
+                                                   cb->remoteID >= 0);
         }
     }

@@ -280,9 +300,13 @@ virObjectEventCallbackListPurgeMarked(virObjectEventCallbackListPtr cbList)
  * @eventID: the event ID
  * @callback: the callback to locate
  * @legacy: true if callback is tracked by function instead of callbackID
+ * @remoteID: optionally return a known remoteID
  *
  * Internal function to determine if @callback already has a
- * callbackID in @cbList for the given @conn and other filters.
+ * callbackID in @cbList for the given @conn and other filters.  If
+ * @remoteID is non-NULL, and another callback exists that can be
+ * serviced by the same remote event, then set it to that remote ID.
+ *
  * Return the id if found, or -1 with no error issued if not present.
  */
 static int ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
@@ -292,29 +316,33 @@ virObjectEventCallbackLookup(virConnectPtr conn,
                              virClassPtr klass,
                              int eventID,
                              virConnectObjectEventGenericCallback callback,
-                             bool legacy)
+                             bool legacy,
+                             int *remoteID)
 {
-    int ret = -1;
     size_t i;

+    if (remoteID)
+        *remoteID = -1;
+
     for (i = 0; i < cbList->count; i++) {
         virObjectEventCallbackPtr cb = cbList->callbacks[i];

         if (cb->deleted)
             continue;
-        if (cb->cb == callback &&
-            cb->klass == klass &&
+        if (cb->klass == klass &&
             cb->eventID == eventID &&
             cb->conn == conn &&
             cb->legacy == legacy &&
             ((uuid && cb->uuid_filter &&
               memcmp(cb->uuid, uuid, VIR_UUID_BUFLEN) == 0) ||
              (!uuid && !cb->uuid_filter))) {
-            ret = cb->callbackID;
-            break;
+            if (remoteID)
+                *remoteID = cb->remoteID;
+            if (cb->cb == callback)
+                return cb->callbackID;
         }
     }
-    return ret;
+    return -1;
 }


@@ -329,6 +357,7 @@ virObjectEventCallbackLookup(virConnectPtr conn,
  * @opaque: opaque data to pass to @callback
  * @freecb: callback to free @opaque
  * @callbackID: filled with callback ID
+ * @serverFilter: true if server supports object filtering
  *
  * Internal function to add a callback from a virObjectEventCallbackListPtr
  */
@@ -341,10 +370,12 @@ virObjectEventCallbackListAddID(virConnectPtr conn,
                                 virConnectObjectEventGenericCallback callback,
                                 void *opaque,
                                 virFreeCallback freecb,
-                                int *callbackID)
+                                int *callbackID,
+                                bool serverFilter)
 {
     virObjectEventCallbackPtr event;
     int ret = -1;
+    int remoteID = -1;

     VIR_DEBUG("conn=%p cblist=%p uuid=%p "
               "klass=%p eventID=%d callback=%p opaque=%p",
@@ -358,7 +389,8 @@ virObjectEventCallbackListAddID(virConnectPtr conn,
     /* check if we already have this callback on our list */
     if (virObjectEventCallbackLookup(conn, cbList, uuid,
                                      klass, eventID, callback,
-                                     !callbackID) != -1) {
+                                     !callbackID,
+                                     serverFilter ? &remoteID : NULL) != -1) {
         virReportError(VIR_ERR_INVALID_ARG, "%s",
                        _("event callback already tracked"));
         return -1;
@@ -373,6 +405,7 @@ virObjectEventCallbackListAddID(virConnectPtr conn,
     event->eventID = eventID;
     event->opaque = opaque;
     event->freecb = freecb;
+    event->remoteID = remoteID;

     /* Only need 'uuid' for matching; 'id' can change as domain
      * switches between running and shutoff, and 'name' can change in
@@ -390,7 +423,10 @@ virObjectEventCallbackListAddID(virConnectPtr conn,
     if (VIR_APPEND_ELEMENT(cbList->callbacks, cbList->count, event) < 0)
         goto cleanup;

-    ret = virObjectEventCallbackListCount(conn, cbList, klass, eventID);
+    ret = virObjectEventCallbackListCount(conn, cbList, klass, eventID,
+                                          uuid, serverFilter);
+    if (serverFilter && remoteID < 0)
+        ret++;

 cleanup:
     if (event)
@@ -588,6 +624,7 @@ virObjectEventNew(virClassPtr klass,

     event->dispatch = dispatcher;
     event->eventID = eventID;
+    event->remoteID = -1;

     if (VIR_STRDUP(event->meta.name, name) < 0) {
         VIR_FREE(event);
@@ -635,6 +672,8 @@ virObjectEventDispatchMatchCallback(virObjectEventPtr event,
         return false;
     if (cb->eventID != event->eventID)
         return false;
+    if (cb->remoteID != event->remoteID)
+        return false;

     if (cb->uuid_filter) {
         /* Deliberately ignoring 'id' for matching, since that
@@ -692,17 +731,21 @@ virObjectEventStateQueueDispatch(virObjectEventStatePtr state,


 /**
- * virObjectEventStateQueue:
+ * virObjectEventStateQueueRemote:
  * @state: the event state object
  * @event: event to add to the queue
+ * @remoteID: limit dispatch to callbacks with the same remote id
  *
  * Adds @event to the queue of events to be dispatched at the next
  * safe moment.  The caller should no longer use @event after this
- * call.
+ * call.  If @remoteID is non-negative, the event will only be sent to
+ * callbacks where virObjectEventStateSetRemote() registered a remote
+ * id.
  */
 void
-virObjectEventStateQueue(virObjectEventStatePtr state,
-                         virObjectEventPtr event)
+virObjectEventStateQueueRemote(virObjectEventStatePtr state,
+                               virObjectEventPtr event,
+                               int remoteID)
 {
     if (state->timer < 0) {
         virObjectUnref(event);
@@ -711,6 +754,7 @@ virObjectEventStateQueue(virObjectEventStatePtr state,

     virObjectEventStateLock(state);

+    event->remoteID = remoteID;
     if (virObjectEventQueuePush(state->queue, event) < 0) {
         VIR_DEBUG("Error adding event to queue");
         virObjectUnref(event);
@@ -722,6 +766,23 @@ virObjectEventStateQueue(virObjectEventStatePtr state,
 }


+/**
+ * virObjectEventStateQueue:
+ * @state: the event state object
+ * @event: event to add to the queue
+ *
+ * Adds @event to the queue of events to be dispatched at the next
+ * safe moment.  The caller should no longer use @event after this
+ * call.
+ */
+void
+virObjectEventStateQueue(virObjectEventStatePtr state,
+                         virObjectEventPtr event)
+{
+    virObjectEventStateQueueRemote(state, event, -1);
+}
+
+
 static void
 virObjectEventStateFlush(virObjectEventStatePtr state)
 {
@@ -761,12 +822,27 @@ virObjectEventStateFlush(virObjectEventStatePtr state)
  * @opaque: data blob to pass to @callback
  * @freecb: callback to free @opaque
  * @callbackID: filled with callback ID
+ * @serverFilter: true if server supports object filtering
  *
  * Register the function @cb with connection @conn, from @state, for
  * events of type @eventID, and return the registration handle in
  * @callbackID.
  *
- * Returns: the number of callbacks now registered, or -1 on error
+ * The return value is only important when registering client-side
+ * mirroring of remote events (since the public API is documented to
+ * return the callbackID rather than a count).  A return of 1 means
+ * that this is the first use of this type of event, so a remote event
+ * must be enabled; a return larger than 1 means that an existing
+ * remote event can already feed this callback.  If @serverFilter is
+ * false, the return count assumes that a single global remote feeds
+ * both generic and per-object callbacks, and that the event queue
+ * will be fed with virObjectEventStateQueue().  If it is true, then
+ * the return count assumes that the remote side is capable of per-
+ * object filtering; the user must call virObjectEventStateSetRemote()
+ * to record the remote id, and queue events with
+ * virObjectEventStateQueueRemote().
+ *
+ * Returns: the number of callbacks now registered, or -1 on error.
  */
 int
 virObjectEventStateRegisterID(virConnectPtr conn,
@@ -777,7 +853,8 @@ virObjectEventStateRegisterID(virConnectPtr conn,
                               virConnectObjectEventGenericCallback cb,
                               void *opaque,
                               virFreeCallback freecb,
-                              int *callbackID)
+                              int *callbackID,
+                              bool serverFilter)
 {
     int ret = -1;

@@ -797,7 +874,7 @@ virObjectEventStateRegisterID(virConnectPtr conn,
     ret = virObjectEventCallbackListAddID(conn, state->callbacks,
                                           uuid, klass, eventID,
                                           cb, opaque, freecb,
-                                          callbackID);
+                                          callbackID, serverFilter);

     if (ret == -1 &&
         state->callbacks->count == 0 &&
@@ -874,7 +951,7 @@ virObjectEventStateCallbackID(virConnectPtr conn,

     virObjectEventStateLock(state);
     ret = virObjectEventCallbackLookup(conn, state->callbacks, NULL,
-                                       klass, eventID, callback, true);
+                                       klass, eventID, callback, true, NULL);
     virObjectEventStateUnlock(state);

     if (ret < 0)
@@ -890,16 +967,20 @@ virObjectEventStateCallbackID(virConnectPtr conn,
  * @conn: connection associated with the callback
  * @state: object event state
  * @callbackID: the callback to query
+ * @remoteID: optionally output remote ID of the callback
  *
- * Query what event ID type is associated with the
- * callback @callbackID for connection @conn
+ * Query what event ID type is associated with the callback
+ * @callbackID for connection @conn.  If @remoteID is non-null, it
+ * will be set to the remote id previously registered with
+ * virObjectEventStateSetRemote().
  *
  * Returns 0 on success, -1 on error
  */
 int
 virObjectEventStateEventID(virConnectPtr conn,
                            virObjectEventStatePtr state,
-                           int callbackID)
+                           int callbackID,
+                           int *remoteID)
 {
     int ret = -1;
     size_t i;
@@ -913,6 +994,8 @@ virObjectEventStateEventID(virConnectPtr conn,
             continue;

         if (cb->callbackID == callbackID && cb->conn == conn) {
+            if (remoteID)
+                *remoteID = cb->remoteID;
             ret = cb->eventID;
             break;
         }
@@ -925,3 +1008,39 @@ virObjectEventStateEventID(virConnectPtr conn,
                        callbackID);
     return ret;
 }
+
+
+/**
+ * virObjectEventStateSetRemote:
+ * @conn: connection associated with the callback
+ * @state: object event state
+ * @callbackID: the callback to adjust
+ * @remoteID: the remote ID to associate with the callback
+ *
+ * Update @callbackID for connection @conn to record that it is now
+ * tied to @remoteID, and will therefore only match events that are
+ * sent with virObjectEventStateQueueRemote() with the same remote ID.
+ * Silently does nothing if @callbackID is invalid.
+ */
+void
+virObjectEventStateSetRemote(virConnectPtr conn,
+                             virObjectEventStatePtr state,
+                             int callbackID,
+                             int remoteID)
+{
+    size_t i;
+
+    virObjectEventStateLock(state);
+    for (i = 0; i < state->callbacks->count; i++) {
+        virObjectEventCallbackPtr cb = state->callbacks->callbacks[i];
+
+        if (cb->deleted)
+            continue;
+
+        if (cb->callbackID == callbackID && cb->conn == conn) {
+            cb->remoteID = remoteID;
+            break;
+        }
+    }
+    virObjectEventStateUnlock(state);
+}
diff --git a/src/conf/object_event.h b/src/conf/object_event.h
index 39e92d5..7654799 100644
--- a/src/conf/object_event.h
+++ b/src/conf/object_event.h
@@ -67,27 +67,31 @@ void
 virObjectEventStateQueue(virObjectEventStatePtr state,
                          virObjectEventPtr event)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
-int
-virObjectEventStateRegisterID(virConnectPtr conn,
-                              virObjectEventStatePtr state,
-                              unsigned char *uuid,
-                              virClassPtr klass,
-                              int eventID,
-                              virConnectObjectEventGenericCallback cb,
-                              void *opaque,
-                              virFreeCallback freecb,
-                              int *callbackID)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(4)
-    ATTRIBUTE_NONNULL(6);
+
+void
+virObjectEventStateQueueRemote(virObjectEventStatePtr state,
+                               virObjectEventPtr event,
+                               int remoteID)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+
 int
 virObjectEventStateDeregisterID(virConnectPtr conn,
                                 virObjectEventStatePtr state,
                                 int callbackID)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+
 int
 virObjectEventStateEventID(virConnectPtr conn,
                            virObjectEventStatePtr state,
-                           int callbackID)
+                           int callbackID,
+                           int *remoteID)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+
+void
+virObjectEventStateSetRemote(virConnectPtr conn,
+                             virObjectEventStatePtr state,
+                             int callbackID,
+                             int remoteID)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);

 #endif
diff --git a/src/conf/object_event_private.h b/src/conf/object_event_private.h
index 571fc40..445d726 100644
--- a/src/conf/object_event_private.h
+++ b/src/conf/object_event_private.h
@@ -48,6 +48,7 @@ struct _virObjectEvent {
     virObject parent;
     int eventID;
     virObjectMeta meta;
+    int remoteID;
     virObjectEventDispatchFunc dispatch;
 };

@@ -55,6 +56,20 @@ virClassPtr
 virClassForObjectEvent(void);

 int
+virObjectEventStateRegisterID(virConnectPtr conn,
+                              virObjectEventStatePtr state,
+                              unsigned char *uuid,
+                              virClassPtr klass,
+                              int eventID,
+                              virConnectObjectEventGenericCallback cb,
+                              void *opaque,
+                              virFreeCallback freecb,
+                              int *callbackID,
+                              bool remoteFilter)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(4)
+    ATTRIBUTE_NONNULL(6);
+
+int
 virObjectEventStateCallbackID(virConnectPtr conn,
                               virObjectEventStatePtr state,
                               virClassPtr klass,
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 3b3de15..91d1304 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -634,7 +634,6 @@ virObjectEventStateEventID;
 virObjectEventStateFree;
 virObjectEventStateNew;
 virObjectEventStateQueue;
-virObjectEventStateRegisterID;


 # conf/secret_conf.h
diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
index da9c1c9..d719a49 100644
--- a/src/remote/remote_driver.c
+++ b/src/remote/remote_driver.c
@@ -151,7 +151,7 @@ static void make_nonnull_storage_vol(remote_nonnull_storage_vol *vol_dst, virSto
 static void make_nonnull_secret(remote_nonnull_secret *secret_dst, virSecretPtr secret_src);
 static void make_nonnull_nwfilter(remote_nonnull_nwfilter *nwfilter_dst, virNWFilterPtr nwfilter_src);
 static void make_nonnull_domain_snapshot(remote_nonnull_domain_snapshot *snapshot_dst, virDomainSnapshotPtr snapshot_src);
-static void remoteEventQueue(struct private_data *priv, virObjectEventPtr event);
+
 /*----------------------------------------------------------------------*/

 /* Helper functions for remoteOpen. */
@@ -2928,10 +2928,10 @@ remoteConnectNetworkEventRegisterAny(virConnectPtr conn,

     remoteDriverLock(priv);

-    if ((count = virNetworkEventStateRegisterID(conn, priv->eventState,
-                                                net, eventID, callback,
-                                                opaque, freecb,
-                                                &callbackID)) < 0)
+    if ((count = virNetworkEventStateRegisterClient(conn, priv->eventState,
+                                                    net, eventID, callback,
+                                                    opaque, freecb,
+                                                    &callbackID)) < 0)
         goto done;

     /* If this is the first callback for this eventID, we need to enable
@@ -2964,12 +2964,13 @@ remoteConnectNetworkEventDeregisterAny(virConnectPtr conn,
     int rv = -1;
     remote_connect_network_event_deregister_any_args args;
     int eventID;
+    int remoteID;
     int count;

     remoteDriverLock(priv);

     if ((eventID = virObjectEventStateEventID(conn, priv->eventState,
-                                              callbackID)) < 0)
+                                              callbackID, &remoteID)) < 0)
         goto done;

     if ((count = virObjectEventStateDeregisterID(conn, priv->eventState,
@@ -4467,6 +4468,15 @@ done:


 static void
+remoteEventQueue(struct private_data *priv, virObjectEventPtr event,
+                 int remoteID)
+{
+    if (event)
+        virObjectEventStateQueueRemote(priv->eventState, event, remoteID);
+}
+
+
+static void
 remoteDomainBuildEventLifecycle(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,
                                 virNetClientPtr client ATTRIBUTE_UNUSED,
                                 void *evdata, void *opaque)
@@ -4484,7 +4494,7 @@ remoteDomainBuildEventLifecycle(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,
     event = virDomainEventLifecycleNewFromDom(dom, msg->event, msg->detail);
     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4506,7 +4516,7 @@ remoteDomainBuildEventReboot(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,
     event = virDomainEventRebootNewFromDom(dom);
     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4528,7 +4538,7 @@ remoteDomainBuildEventRTCChange(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,
     event = virDomainEventRTCChangeNewFromDom(dom, msg->offset);
     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4550,7 +4560,7 @@ remoteDomainBuildEventWatchdog(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,
     event = virDomainEventWatchdogNewFromDom(dom, msg->action);
     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4575,7 +4585,7 @@ remoteDomainBuildEventIOError(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,
                                             msg->action);
     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4602,7 +4612,7 @@ remoteDomainBuildEventIOErrorReason(virNetClientProgramPtr prog ATTRIBUTE_UNUSED

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }

 static void
@@ -4625,7 +4635,7 @@ remoteDomainBuildEventBlockJob(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }

 static void
@@ -4681,7 +4691,7 @@ remoteDomainBuildEventGraphics(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
     return;

 error:
@@ -4727,7 +4737,7 @@ remoteDomainBuildEventControlError(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4754,7 +4764,7 @@ remoteDomainBuildEventDiskChange(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4779,7 +4789,7 @@ remoteDomainBuildEventTrayChange(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }

 static void
@@ -4801,7 +4811,7 @@ remoteDomainBuildEventPMWakeup(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }

 static void
@@ -4823,7 +4833,7 @@ remoteDomainBuildEventPMSuspend(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4845,7 +4855,7 @@ remoteDomainBuildEventBalloonChange(virNetClientProgramPtr prog ATTRIBUTE_UNUSED
     event = virDomainEventBalloonChangeNewFromDom(dom, msg->actual);
     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4868,7 +4878,7 @@ remoteDomainBuildEventPMSuspendDisk(virNetClientProgramPtr prog ATTRIBUTE_UNUSED

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4891,7 +4901,7 @@ remoteDomainBuildEventDeviceRemoved(virNetClientProgramPtr prog ATTRIBUTE_UNUSED

     virDomainFree(dom);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -4910,10 +4920,11 @@ remoteNetworkBuildEventLifecycle(virNetClientProgramPtr prog ATTRIBUTE_UNUSED,
     if (!net)
         return;

-    event = virNetworkEventLifecycleNew(net->name, net->uuid, msg->event, msg->detail);
+    event = virNetworkEventLifecycleNew(net->name, net->uuid, msg->event,
+                                        msg->detail);
     virNetworkFree(net);

-    remoteEventQueue(priv, event);
+    remoteEventQueue(priv, event, -1);
 }


@@ -5264,7 +5275,7 @@ remoteConnectDomainEventDeregisterAny(virConnectPtr conn,
     remoteDriverLock(priv);

     if ((eventID = virObjectEventStateEventID(conn, priv->eventState,
-                                              callbackID)) < 0)
+                                              callbackID, NULL)) < 0)
         goto done;

     if ((count = virObjectEventStateDeregisterID(conn, priv->eventState,
@@ -6798,12 +6809,6 @@ done:
     return rv;
 }

-static void
-remoteEventQueue(struct private_data *priv, virObjectEventPtr event)
-{
-    if (event)
-        virObjectEventStateQueue(priv->eventState, event);
-}

 /* get_nonnull_domain and get_nonnull_network turn an on-wire
  * (name, uuid) pair into virDomainPtr or virNetworkPtr object.
-- 
1.8.4.2


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