1. A computer-implemented method comprising: activating a virtual adapter hosted on a physical adapter of a host system of a computing environment, the virtual adapter being for use by a guest of the host system in performing data input and output, the virtual adapter being in an initial state prior to the activating, the activating being based on a request made to the physical adapter that the virtual adapter be activated, wherein the activating activates the virtual adapter absent involvement of the guest; based on the activating, constructing configuration information of the activated virtual adapter, the configuration information indicative of at least a unique identifier assigned to the activated virtual adapter; providing the configuration information to a control component; and returning the activated virtual adapter to the initial state that the virtual adapter was in prior to the activating, wherein the activating the virtual adapter, the constructing the configuration information, the providing the configuration information, and the returning the activated virtual adapter to the initial state are performed absent involvement of the guest.