On Tue, Nov 30, 2010 at 10:20:38AM +0000, Daniel P. Berrange wrote:
The AttachObject/DetachObject calls are made by libvirtd, whenever it is about todo something on behalf of the managed object holding the lock. eg when libvirtd does disk hotplug it will do
$man = NewObject() AttachObject($man, $QEMUPID); AcquireResource($man, $newdiskpath); DetachObject($man); FreeObject($man)
So basically the AttachObject call is telling the lock manager plugin what $PID the following AcquireResource operation needs to be applied to. Chances are your DetachObject call will only need to be a no-op but I put the hook in just in case there's a need for it
OK, it seems a roundabout way of SetParameter($man, "pid", $QEMUPID), but "just in case ..." seems to be the consistent approach here. Dave