Re: [libvirt] PATCH: Add a new error code for invalid operations

A number of operations are only valid when the corresponding object is in a particular state. eg, you can only suspend a domain, if it is currently running. We don't have a very consistent way of reporting this problem across drivers, so this patch introduces a new error code for this situation called VIR_ERR_INVALID_OPERATION. This code is intended to be used if the operation is supported, but not applicable for the object at this time. It updates the Xen and QEMU drivers to use this error code.