[libvirt] [PATCH] daemon: fixup refcounting in close callback handling

[Nikolay Shirokovskiy]

remoteDispatchConnectCloseCallbackRegister introduced in
f484310add53ebdc26a6fdcb88bc398750325b7e has problems. It refcounts
network client object and in case of NOOP driver operations
for close callback registering/unregistering (any driveres besides
vz) nobody will unref it later. As a result client connection
will not be disposed and driver connection will not be closed.

The fix is easy. We don't need to refcount at all. We don't get
dangling pointer because in remoteClientFreeFunc which is called
upon disposing this network client object we unregistering close
callback.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy at virtuozzo.com>
---
 daemon/remote.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/daemon/remote.c b/daemon/remote.c
index 04d8ada..17783fa 100644
--- a/daemon/remote.c
+++ b/daemon/remote.c
@@ -3382,11 +3382,9 @@ remoteDispatchConnectCloseCallbackRegister(virNetServerPtr server ATTRIBUTE_UNUS
         goto cleanup;
     }
 
-    // on behalf of close callback
-    virObjectRef(client);
     if (virConnectRegisterCloseCallback(priv->conn,
                                         remoteRelayConnectionClosedEvent,
-                                        client, virObjectFreeCallback) < 0)
+                                        client, NULL) < 0)
         goto cleanup;
 
     priv->closeRegistered = true;
-- 
1.8.3.1