event: move event filtering to daemon (regression fix)

https://bugzilla.redhat.com/show_bug.cgi?id=1058839

Commit f9f56340 for CVE-2014-0028 almost had the right idea - we
need to check the ACL rules to filter which events to send.  But
it overlooked one thing: the event dispatch queue is running in
the main loop thread, and therefore does not normally have a
current virIdentityPtr.  But filter checks can be based on current
identity, so when libvirtd.conf contains access_drivers=["polkit"],
we ended up rejecting access for EVERY event due to failure to
look up the current identity, even if it should have been allowed.

Furthermore, even for events that are triggered by API calls, it
is important to remember that the point of events is that they can
be copied across multiple connections, which may have separate
identities and permissions.  So even if events were dispatched
from a context where we have an identity, we must change to the
correct identity of the connection that will be receiving the
event, rather than basing a decision on the context that triggered
the event, when deciding whether to filter an event to a
particular connection.

If there were an easy way to get from virConnectPtr to the
appropriate virIdentityPtr, then object_event.c could adjust the
identity prior to checking whether to dispatch an event.  But
setting up that back-reference is a bit invasive.  Instead, it
is easier to delay the filtering check until lower down the
stack, at the point where we have direct access to the RPC
client object that owns an identity.  As such, this patch ends
up reverting a large portion of the framework of commit f9f56340.
We also have to teach 'make check' to special-case the fact that
the event registration filtering is done at the point of dispatch,
rather than the point of registration.  Note that even though we
don't actually use virConnectDomainEventRegisterCheckACL (because
the RegisterAny variant is sufficient), we still generate the
function for the purposes of documenting that the filtering
takes place.

Also note that I did not entirely delete the notion of a filter
from object_event.c; I still plan on using that for my upcoming
patch series for qemu monitor events in libvirt-qemu.so.  In
other words, while this patch changes ACL filtering to live in
remote.c and therefore we have no current client of the filtering
in object_event.c, the notion of filtering in object_event.c is
still useful down the road.

* src/check-aclrules.pl: Exempt event registration from having to
pass checkACL filter down call stack.
* daemon/remote.c (remoteRelayDomainEventCheckACL)
(remoteRelayNetworkEventCheckACL): New functions.
(remoteRelay*Event*): Use new functions.
* src/conf/domain_event.h (virDomainEventStateRegister)
(virDomainEventStateRegisterID): Drop unused parameter.
* src/conf/network_event.h (virNetworkEventStateRegisterID):
Likewise.
* src/conf/domain_event.c (virDomainEventFilter): Delete unused
function.
* src/conf/network_event.c (virNetworkEventFilter): Likewise.
* src/libxl/libxl_driver.c: Adjust caller.
* src/lxc/lxc_driver.c: Likewise.
* src/network/bridge_driver.c: Likewise.
* src/qemu/qemu_driver.c: Likewise.
* src/remote/remote_driver.c: Likewise.
* src/test/test_driver.c: Likewise.
* src/uml/uml_driver.c: Likewise.
* src/vbox/vbox_tmpl.c: Likewise.
* src/xen/xen_driver.c: Likewise.
Signed-off-by: NEric Blake <eblake@redhat.com>
(cherry picked from commit 11f20e43)

Conflicts:
	daemon/remote.c - not backporting network events
	src/conf/network_event.c - likewise
	src/conf/network_event.h - likewise
	src/network/bridge_driver.c - likewise
	src/conf/domain_event.c - revert back to pre-CVE state
	src/conf/domain_event.h - likewise
	src/libxl/libxl_driver.c - likewise
	src/lxc/lxc_driver.c - likewise
	src/remote/remote_driver.c - likewise
	src/test/test_driver.c - likewise
	src/uml/uml_driver.c - likewise
	src/xen/xen_driver.c - likewise

daemon/remote.c

@@ -49,6 +49,8 @@
 #include "qemu_protocol.h"
 #include "lxc_protocol.h"
 #include "virstring.h"
+#include "domain_conf.h"
+#include "viraccessapicheck.h"
 
 #define VIR_FROM_THIS VIR_FROM_RPC
 
@@ -114,16 +116,45 @@ remoteDispatchDomainEventSend(virNetServerClientPtr client,
                               xdrproc_t proc,
                               void *data);
 
-static int remoteRelayDomainEventLifecycle(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                           virDomainPtr dom,
-                                           int event,
-                                           int detail,
-                                           void *opaque)
+
+static bool
+remoteRelayDomainEventCheckACL(virNetServerClientPtr client,
+                               virConnectPtr conn, virDomainPtr dom)
+{
+    virDomainDef def;
+    virIdentityPtr identity = NULL;
+    bool ret = false;
+
+    /* For now, we just create a virDomainDef with enough contents to
+     * satisfy what viraccessdriverpolkit.c references.  This is a bit
+     * fragile, but I don't know of anything better.  */
+    def.name = dom->name;
+    memcpy(def.uuid, dom->uuid, VIR_UUID_BUFLEN);
+
+    if (!(identity = virNetServerClientGetIdentity(client)))
+        goto cleanup;
+    if (virIdentitySetCurrent(identity) < 0)
+        goto cleanup;
+    ret = virConnectDomainEventRegisterAnyCheckACL(conn, &def);
+
+cleanup:
+    ignore_value(virIdentitySetCurrent(NULL));
+    virObjectUnref(identity);
+    return ret;
+}
+
+
+static int
+remoteRelayDomainEventLifecycle(virConnectPtr conn,
+                                virDomainPtr dom,
+                                int event,
+                                int detail,
+                                void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_lifecycle_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain lifecycle event %d %d", event, detail);
@@ -141,14 +172,15 @@ static int remoteRelayDomainEventLifecycle(virConnectPtr conn ATTRIBUTE_UNUSED,
     return 0;
 }
 
-static int remoteRelayDomainEventReboot(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                        virDomainPtr dom,
-                                        void *opaque)
+static int
+remoteRelayDomainEventReboot(virConnectPtr conn,
+                             virDomainPtr dom,
+                             void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_reboot_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain reboot event %s %d", dom->name, dom->id);
@@ -165,15 +197,16 @@ static int remoteRelayDomainEventReboot(virConnectPtr conn ATTRIBUTE_UNUSED,
 }
 
 
-static int remoteRelayDomainEventRTCChange(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                           virDomainPtr dom,
-                                           long long offset,
-                                           void *opaque)
+static int
+remoteRelayDomainEventRTCChange(virConnectPtr conn,
+                                virDomainPtr dom,
+                                long long offset,
+                                void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_rtc_change_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain rtc change event %s %d %lld", dom->name, dom->id, offset);
@@ -191,15 +224,16 @@ static int remoteRelayDomainEventRTCChange(virConnectPtr conn ATTRIBUTE_UNUSED,
 }
 
 
-static int remoteRelayDomainEventWatchdog(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                          virDomainPtr dom,
-                                          int action,
-                                          void *opaque)
+static int
+remoteRelayDomainEventWatchdog(virConnectPtr conn,
+                               virDomainPtr dom,
+                               int action,
+                               void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_watchdog_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain watchdog event %s %d %d", dom->name, dom->id, action);
@@ -217,17 +251,18 @@ static int remoteRelayDomainEventWatchdog(virConnectPtr conn ATTRIBUTE_UNUSED,
 }
 
 
-static int remoteRelayDomainEventIOError(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                         virDomainPtr dom,
-                                         const char *srcPath,
-                                         const char *devAlias,
-                                         int action,
-                                         void *opaque)
+static int
+remoteRelayDomainEventIOError(virConnectPtr conn,
+                              virDomainPtr dom,
+                              const char *srcPath,
+                              const char *devAlias,
+                              int action,
+                              void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_io_error_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain io error %s %d %s %s %d", dom->name, dom->id, srcPath, devAlias, action);
@@ -252,18 +287,19 @@ error:
 }
 
 
-static int remoteRelayDomainEventIOErrorReason(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                               virDomainPtr dom,
-                                               const char *srcPath,
-                                               const char *devAlias,
-                                               int action,
-                                               const char *reason,
-                                               void *opaque)
+static int
+remoteRelayDomainEventIOErrorReason(virConnectPtr conn,
+                                    virDomainPtr dom,
+                                    const char *srcPath,
+                                    const char *devAlias,
+                                    int action,
+                                    const char *reason,
+                                    void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_io_error_reason_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain io error %s %d %s %s %d %s",
@@ -293,20 +329,21 @@ error:
 }
 
 
-static int remoteRelayDomainEventGraphics(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                          virDomainPtr dom,
-                                          int phase,
-                                          virDomainEventGraphicsAddressPtr local,
-                                          virDomainEventGraphicsAddressPtr remote,
-                                          const char *authScheme,
-                                          virDomainEventGraphicsSubjectPtr subject,
-                                          void *opaque)
+static int
+remoteRelayDomainEventGraphics(virConnectPtr conn,
+                               virDomainPtr dom,
+                               int phase,
+                               virDomainEventGraphicsAddressPtr local,
+                               virDomainEventGraphicsAddressPtr remote,
+                               const char *authScheme,
+                               virDomainEventGraphicsSubjectPtr subject,
+                               void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_graphics_msg data;
     size_t i;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain graphics event %s %d %d - %d %s %s  - %d %s %s - %s", dom->name, dom->id, phase,
@@ -364,17 +401,18 @@ error:
     return -1;
 }
 
-static int remoteRelayDomainEventBlockJob(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                          virDomainPtr dom,
-                                          const char *path,
-                                          int type,
-                                          int status,
-                                          void *opaque)
+static int
+remoteRelayDomainEventBlockJob(virConnectPtr conn,
+                               virDomainPtr dom,
+                               const char *path,
+                               int type,
+                               int status,
+                               void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_block_job_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain block job event %s %d %s %i, %i",
@@ -399,14 +437,15 @@ error:
 }
 
 
-static int remoteRelayDomainEventControlError(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                              virDomainPtr dom,
-                                              void *opaque)
+static int
+remoteRelayDomainEventControlError(virConnectPtr conn,
+                                   virDomainPtr dom,
+                                   void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_control_error_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain control error %s %d", dom->name, dom->id);
@@ -423,19 +462,20 @@ static int remoteRelayDomainEventControlError(virConnectPtr conn ATTRIBUTE_UNUSE
 }
 
 
-static int remoteRelayDomainEventDiskChange(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                            virDomainPtr dom,
-                                            const char *oldSrcPath,
-                                            const char *newSrcPath,
-                                            const char *devAlias,
-                                            int reason,
-                                            void *opaque)
+static int
+remoteRelayDomainEventDiskChange(virConnectPtr conn,
+                                 virDomainPtr dom,
+                                 const char *oldSrcPath,
+                                 const char *newSrcPath,
+                                 const char *devAlias,
+                                 int reason,
+                                 void *opaque)
 {
     virNetServerClientPtr client = opaque;
     remote_domain_event_disk_change_msg data;
     char **oldSrcPath_p = NULL, **newSrcPath_p = NULL;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain %s %d disk change %s %s %s %d",
@@ -474,15 +514,17 @@ error:
 }
 
 
-static int remoteRelayDomainEventTrayChange(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                            virDomainPtr dom,
-                                            const char *devAlias,
-                                            int reason,
-                                            void *opaque) {
+static int
+remoteRelayDomainEventTrayChange(virConnectPtr conn,
+                                 virDomainPtr dom,
+                                 const char *devAlias,
+                                 int reason,
+                                 void *opaque)
+{
     virNetServerClientPtr client = opaque;
     remote_domain_event_tray_change_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain %s %d tray change devAlias: %s reason: %d",
@@ -504,14 +546,16 @@ static int remoteRelayDomainEventTrayChange(virConnectPtr conn ATTRIBUTE_UNUSED,
     return 0;
 }
 
-static int remoteRelayDomainEventPMWakeup(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                          virDomainPtr dom,
-                                          int reason ATTRIBUTE_UNUSED,
-                                          void *opaque) {
+static int
+remoteRelayDomainEventPMWakeup(virConnectPtr conn,
+                               virDomainPtr dom,
+                               int reason ATTRIBUTE_UNUSED,
+                               void *opaque)
+{
     virNetServerClientPtr client = opaque;
     remote_domain_event_pmwakeup_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain %s %d system pmwakeup", dom->name, dom->id);
@@ -527,14 +571,16 @@ static int remoteRelayDomainEventPMWakeup(virConnectPtr conn ATTRIBUTE_UNUSED,
     return 0;
 }
 
-static int remoteRelayDomainEventPMSuspend(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                           virDomainPtr dom,
-                                           int reason ATTRIBUTE_UNUSED,
-                                           void *opaque) {
+static int
+remoteRelayDomainEventPMSuspend(virConnectPtr conn,
+                                virDomainPtr dom,
+                                int reason ATTRIBUTE_UNUSED,
+                                void *opaque)
+{
     virNetServerClientPtr client = opaque;
     remote_domain_event_pmsuspend_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain %s %d system pmsuspend", dom->name, dom->id);
@@ -551,7 +597,7 @@ static int remoteRelayDomainEventPMSuspend(virConnectPtr conn ATTRIBUTE_UNUSED,
 }
 
 static int
-remoteRelayDomainEventBalloonChange(virConnectPtr conn ATTRIBUTE_UNUSED,
+remoteRelayDomainEventBalloonChange(virConnectPtr conn,
                                     virDomainPtr dom,
                                     unsigned long long actual,
                                     void *opaque)
@@ -559,7 +605,7 @@ remoteRelayDomainEventBalloonChange(virConnectPtr conn ATTRIBUTE_UNUSED,
     virNetServerClientPtr client = opaque;
     remote_domain_event_balloon_change_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain balloon change event %s %d %lld", dom->name, dom->id, actual);
@@ -577,14 +623,16 @@ remoteRelayDomainEventBalloonChange(virConnectPtr conn ATTRIBUTE_UNUSED,
 }
 
 
-static int remoteRelayDomainEventPMSuspendDisk(virConnectPtr conn ATTRIBUTE_UNUSED,
-                                               virDomainPtr dom,
-                                               int reason ATTRIBUTE_UNUSED,
-                                               void *opaque) {
+static int
+remoteRelayDomainEventPMSuspendDisk(virConnectPtr conn,
+                                    virDomainPtr dom,
+                                    int reason ATTRIBUTE_UNUSED,
+                                    void *opaque)
+{
     virNetServerClientPtr client = opaque;
     remote_domain_event_pmsuspend_disk_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain %s %d system pmsuspend-disk", dom->name, dom->id);
@@ -601,7 +649,7 @@ static int remoteRelayDomainEventPMSuspendDisk(virConnectPtr conn ATTRIBUTE_UNUS
 }
 
 static int
-remoteRelayDomainEventDeviceRemoved(virConnectPtr conn ATTRIBUTE_UNUSED,
+remoteRelayDomainEventDeviceRemoved(virConnectPtr conn,
                                     virDomainPtr dom,
                                     const char *devAlias,
                                     void *opaque)
@@ -609,7 +657,7 @@ remoteRelayDomainEventDeviceRemoved(virConnectPtr conn ATTRIBUTE_UNUSED,
     virNetServerClientPtr client = opaque;
     remote_domain_event_device_removed_msg data;
 
-    if (!client)
+    if (!client || !remoteRelayDomainEventCheckACL(client, conn, dom))
         return -1;
 
     VIR_DEBUG("Relaying domain device removed event %s %d %s",

src/check-aclrules.pl

 #!/usr/bin/perl
 #
-# Copyright (C) 2013 Red Hat, Inc.
+# Copyright (C) 2013-2014 Red Hat, Inc.
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Lesser General Public
@@ -140,7 +140,10 @@ while (<PROTO>) {
         } elsif ($filtered &&
                  m,REMOTE_PROC_(.*)\s+=\s*\d+,) {
             my $api = name_to_ProcName($1);
-            $filtered{$api} = 1;
+            # Event filtering is handled in daemon/remote.c instead of drivers
+            if (! m,_EVENT_REGISTER,) {
+                $filtered{$api} = 1;
+            }
             $incomment = 0;
         }
     }

src/conf/domain_event.c

@@ -32,20 +32,6 @@
 
 #define VIR_FROM_THIS VIR_FROM_NONE
 
-/**
- * virObjectEventCallbackFilter:
- * @conn: the connection pointer
- * @event: the event about to be dispatched
- * @opaque: opaque data registered with the filter
- *
- * Callback to do final filtering for a reason not tracked directly by
- * virObjectEventStateRegisterID().  Return false if @event must not
- * be sent to @conn.
- */
-typedef bool (*virObjectEventCallbackFilter)(virConnectPtr conn,
-                                             virDomainEventPtr event,
-                                             void *opaque);
-
 struct _virDomainMeta {
     int id;
     char *name;
@@ -82,8 +68,6 @@ struct _virDomainEventCallback {
     int eventID;
     virConnectPtr conn;
     virDomainMetaPtr dom;
-    virObjectEventCallbackFilter filter;
-    void *filter_opaque;
     virConnectDomainEventGenericCallback cb;
     void *opaque;
     virFreeCallback freecb;
@@ -360,9 +344,6 @@ virDomainEventCallbackListPurgeMarked(virDomainEventCallbackListPtr cbList)
  * virDomainEventCallbackListAddID:
  * @conn: pointer to the connection
  * @cbList: the list
- * @dom: optional domain to filter on
- * @filter optional last-ditch filter callback
- * @filter_opaque: opaque data to pass to @filter
  * @eventID: the event ID
  * @callback: the callback to add
  * @opaque: opaque data tio pass to callback
@@ -374,8 +355,6 @@ static int
 virDomainEventCallbackListAddID(virConnectPtr conn,
                                 virDomainEventCallbackListPtr cbList,
                                 virDomainPtr dom,
-                                virObjectEventCallbackFilter filter,
-                                void *filter_opaque,
                                 int eventID,
                                 virConnectDomainEventGenericCallback callback,
                                 void *opaque,
@@ -422,8 +401,6 @@ virDomainEventCallbackListAddID(virConnectPtr conn,
         memcpy(event->dom->uuid, dom->uuid, VIR_UUID_BUFLEN);
         event->dom->id = dom->id;
     }
-    event->filter = filter;
-    event->filter_opaque = filter_opaque;
 
     /* Make space on list */
     if (VIR_REALLOC_N(cbList->callbacks, cbList->count + 1) < 0)
@@ -463,8 +440,6 @@ error:
  * virDomainEventCallbackListAdd:
  * @conn: pointer to the connection
  * @cbList: the list
- * @filter optional last-ditch filter callback
- * @filter_opaque: opaque data to pass to @filter
  * @callback: the callback to add
  * @opaque: opaque data tio pass to callback
  *
@@ -473,14 +448,11 @@ error:
 static int
 virDomainEventCallbackListAdd(virConnectPtr conn,
                               virDomainEventCallbackListPtr cbList,
-                              virObjectEventCallbackFilter filter,
-                              void *filter_opaque,
                               virConnectDomainEventCallback callback,
                               void *opaque,
                               virFreeCallback freecb)
 {
     return virDomainEventCallbackListAddID(conn, cbList, NULL,
-                                           filter, filter_opaque,
                                            VIR_DOMAIN_EVENT_ID_LIFECYCLE,
                                            VIR_DOMAIN_EVENT_CALLBACK(callback),
                                            opaque, freecb, NULL);
@@ -708,32 +680,6 @@ static virDomainEventPtr virDomainEventNewInternal(int eventID,
     return event;
 }
 
-
-/**
- * virDomainEventFilter:
- * @conn: pointer to the connection
- * @event: the event to check
- * @opaque: opaque data holding ACL filter to use
- *
- * Internal function to run ACL filtering before dispatching an event
- */
-static bool
-virDomainEventFilter(virConnectPtr conn, virDomainEventPtr event,
-                     void *opaque)
-{
-    virDomainDef dom;
-    virDomainObjListFilter filter = opaque;
-
-    /* For now, we just create a virDomainDef with enough contents to
-     * satisfy what viraccessdriverpolkit.c references.  This is a bit
-     * fragile, but I don't know of anything better.  */
-    dom.name = event->dom.name;
-    memcpy(dom.uuid, event->dom.uuid, VIR_UUID_BUFLEN);
-
-    return (filter)(conn, &dom);
-}
-
-
 virDomainEventPtr virDomainEventNew(int id, const char *name,
                                     const unsigned char *uuid,
                                     int type, int detail)
@@ -1435,9 +1381,6 @@ static int virDomainEventDispatchMatchCallback(virDomainEventPtr event,
     if (cb->eventID != event->eventID)
         return 0;
 
-    if (cb->filter && !(cb->filter)(cb->conn, event, cb->filter_opaque))
-        return 0;
-
     if (cb->dom) {
         /* Deliberately ignoring 'id' for matching, since that
          * will cause problems when a domain switches between
@@ -1567,7 +1510,6 @@ virDomainEventStateFlush(virDomainEventStatePtr state)
  * virDomainEventStateRegister:
  * @conn: connection to associate with callback
  * @state: domain event state
- * @filter: optional ACL filter to limit which events can be sent
  * @callback: function to remove from event
  * @opaque: data blob to pass to callback
  * @freecb: callback to free @opaque
@@ -1580,7 +1522,6 @@ virDomainEventStateFlush(virDomainEventStatePtr state)
 int
 virDomainEventStateRegister(virConnectPtr conn,
                             virDomainEventStatePtr state,
-                            virDomainObjListFilter filter,
                             virConnectDomainEventCallback callback,
                             void *opaque,
                             virFreeCallback freecb)
@@ -1601,8 +1542,7 @@ virDomainEventStateRegister(virConnectPtr conn,
     }
 
     ret = virDomainEventCallbackListAdd(conn, state->callbacks,
-                                        filter ? virDomainEventFilter : NULL,
-                                        filter, callback, opaque, freecb);
+                                        callback, opaque, freecb);
 
     if (ret == -1 &&
         state->callbacks->count == 0 &&
@@ -1621,7 +1561,6 @@ cleanup:
  * virDomainEventStateRegisterID:
  * @conn: connection to associate with callback
  * @state: domain event state
- * @filter: optional ACL filter to limit which events can be sent
  * @eventID: ID of the event type to register for
  * @cb: function to remove from event
  * @opaque: data blob to pass to callback
@@ -1636,7 +1575,6 @@ cleanup:
 int
 virDomainEventStateRegisterID(virConnectPtr conn,
                               virDomainEventStatePtr state,
-                              virDomainObjListFilter filter,
                               virDomainPtr dom,
                               int eventID,
                               virConnectDomainEventGenericCallback cb,
@@ -1659,9 +1597,8 @@ virDomainEventStateRegisterID(virConnectPtr conn,
         goto cleanup;
     }
 
-    ret = virDomainEventCallbackListAddID(conn, state->callbacks, dom,
-                                          filter ? virDomainEventFilter : NULL,
-                                          filter, eventID, cb, opaque, freecb,
+    ret = virDomainEventCallbackListAddID(conn, state->callbacks,
+                                          dom, eventID, cb, opaque, freecb,
                                           callbackID);
 
     if (ret == -1 &&

src/conf/domain_event.h

 /*
  * domain_event.h: domain event queue processing helpers
  *
- * Copyright (C) 2012-2014 Red Hat, Inc.
+ * Copyright (C) 2012 Red Hat, Inc.
  * Copyright (C) 2008 VirtualIron
  *
  * This library is free software; you can redistribute it and/or
@@ -149,21 +149,19 @@ virDomainEventStateQueue(virDomainEventStatePtr state,
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
 int virDomainEventStateRegister(virConnectPtr conn,
                                 virDomainEventStatePtr state,
-                                virDomainObjListFilter filter,
                                 virConnectDomainEventCallback callback,
                                 void *opaque,
                                 virFreeCallback freecb)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(4);
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
 int virDomainEventStateRegisterID(virConnectPtr conn,
                                   virDomainEventStatePtr state,
-                                  virDomainObjListFilter filter,
                                   virDomainPtr dom,
                                   int eventID,
                                   virConnectDomainEventGenericCallback cb,
                                   void *opaque,
                                   virFreeCallback freecb,
                                   int *callbackID)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(6);
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(5);
 int
 virDomainEventStateDeregister(virConnectPtr conn,
                               virDomainEventStatePtr state,

src/libxl/libxl_driver.c

@@ -3518,7 +3518,6 @@ libxlConnectDomainEventRegister(virConnectPtr conn,
 
     ret = virDomainEventStateRegister(conn,
                                       driver->domainEventState,
-                                      virConnectDomainEventRegisterCheckACL,
                                       callback, opaque, freecb);
 
     return ret;
@@ -4118,7 +4117,6 @@ libxlConnectDomainEventRegisterAny(virConnectPtr conn, virDomainPtr dom, int eve
 
     if (virDomainEventStateRegisterID(conn,
                                       driver->domainEventState,
-                                      virConnectDomainEventRegisterAnyCheckACL,
                                       dom, eventID, callback, opaque,
                                       freecb, &ret) < 0)
         ret = -1;

src/lxc/lxc_driver.c

@@ -1300,7 +1300,6 @@ lxcConnectDomainEventRegister(virConnectPtr conn,
 
     ret = virDomainEventStateRegister(conn,
                                       driver->domainEventState,
-                                      virConnectDomainEventRegisterCheckACL,
                                       callback, opaque, freecb);
 
     return ret;
@@ -1341,7 +1340,6 @@ lxcConnectDomainEventRegisterAny(virConnectPtr conn,
 
     if (virDomainEventStateRegisterID(conn,
                                       driver->domainEventState,
-                                      virConnectDomainEventRegisterAnyCheckACL,
                                       dom, eventID,
                                       callback, opaque, freecb, &ret) < 0)
         ret = -1;

src/qemu/qemu_driver.c

@@ -9867,7 +9867,6 @@ qemuConnectDomainEventRegister(virConnectPtr conn,
 
     if (virDomainEventStateRegister(conn,
                                     driver->domainEventState,
-                                    virConnectDomainEventRegisterCheckACL,
                                     callback, opaque, freecb) < 0)
         goto cleanup;
 
@@ -9916,7 +9915,6 @@ qemuConnectDomainEventRegisterAny(virConnectPtr conn,
 
     if (virDomainEventStateRegisterID(conn,
                                       driver->domainEventState,
-                                      virConnectDomainEventRegisterAnyCheckACL,
                                       dom, eventID,
                                       callback, opaque, freecb, &ret) < 0)
         ret = -1;

src/remote/remote_driver.c

@@ -4311,7 +4311,7 @@ static int remoteConnectDomainEventRegister(virConnectPtr conn,
 
     remoteDriverLock(priv);
 
-    if ((count = virDomainEventStateRegister(conn, priv->domainEventState, NULL,
+    if ((count = virDomainEventStateRegister(conn, priv->domainEventState,
                                              callback, opaque, freecb)) < 0) {
          virReportError(VIR_ERR_RPC, "%s", _("adding cb to list"));
          goto done;
@@ -5097,7 +5097,7 @@ static int remoteConnectDomainEventRegisterAny(virConnectPtr conn,
     remoteDriverLock(priv);
 
     if ((count = virDomainEventStateRegisterID(conn,
-                                               priv->domainEventState, NULL,
+                                               priv->domainEventState,
                                                dom, eventID,
                                                callback, opaque, freecb,
                                                &callbackID)) < 0) {

src/test/test_driver.c

@@ -5772,7 +5772,7 @@ testConnectDomainEventRegister(virConnectPtr conn,
 
     testDriverLock(driver);
     ret = virDomainEventStateRegister(conn,
-                                      driver->domainEventState, NULL,
+                                      driver->domainEventState,
                                       callback, opaque, freecb);
     testDriverUnlock(driver);
 
@@ -5810,7 +5810,7 @@ testConnectDomainEventRegisterAny(virConnectPtr conn,
 
     testDriverLock(driver);
     if (virDomainEventStateRegisterID(conn,
-                                      driver->domainEventState, NULL,
+                                      driver->domainEventState,
                                       dom, eventID,
                                       callback, opaque, freecb, &ret) < 0)
         ret = -1;

src/uml/uml_driver.c

@@ -2621,7 +2621,6 @@ umlConnectDomainEventRegister(virConnectPtr conn,
     umlDriverLock(driver);
     ret = virDomainEventStateRegister(conn,
                                       driver->domainEventState,
-                                      virConnectDomainEventRegisterCheckACL,
                                       callback, opaque, freecb);
     umlDriverUnlock(driver);
 
@@ -2664,7 +2663,6 @@ umlConnectDomainEventRegisterAny(virConnectPtr conn,
     umlDriverLock(driver);
     if (virDomainEventStateRegisterID(conn,
                                       driver->domainEventState,
-                                      virConnectDomainEventRegisterAnyCheckACL,
                                       dom, eventID,
                                       callback, opaque, freecb, &ret) < 0)
         ret = -1;

src/vbox/vbox_tmpl.c

@@ -7265,7 +7265,7 @@ static int vboxConnectDomainEventRegister(virConnectPtr conn,
              * later you can iterate over them
              */
 
-            ret = virDomainEventStateRegister(conn, data->domainEvents, NULL,
+            ret = virDomainEventStateRegister(conn, data->domainEvents,
                                               callback, opaque, freecb);
             VIR_DEBUG("virDomainEventStateRegister (ret = %d) (conn: %p, "
                       "callback: %p, opaque: %p, "
@@ -7357,7 +7357,7 @@ static int vboxConnectDomainEventRegisterAny(virConnectPtr conn,
              * later you can iterate over them
              */
 
-            if (virDomainEventStateRegisterID(conn, data->domainEvents, NULL,
+            if (virDomainEventStateRegisterID(conn, data->domainEvents,
                                               dom, eventID,
                                               callback, opaque, freecb, &ret) < 0)
                 ret = -1;

src/xen/xen_driver.c

@@ -2316,7 +2316,6 @@ xenUnifiedConnectDomainEventRegister(virConnectPtr conn,
     }
 
     ret = virDomainEventStateRegister(conn, priv->domainEvents,
-                                      virConnectDomainEventRegisterCheckACL,
                                       callback, opaque, freefunc);
 
     xenUnifiedUnlock(priv);
@@ -2374,7 +2373,6 @@ xenUnifiedConnectDomainEventRegisterAny(virConnectPtr conn,
     }
 
     if (virDomainEventStateRegisterID(conn, priv->domainEvents,
-                                      virConnectDomainEventRegisterAnyCheckACL,
                                       dom, eventID,
                                       callback, opaque, freefunc, &ret) < 0)
         ret = -1;