Save more data associated with a new association including the network
address of the remote controller. This permits reconnecting an
association without providing the address or other details. To use
this new mode, provide only an existing device ID to nvmecontrol's
reconnect command. An address can still be provided to request a
different address or other different settings for the new association.
The saved data includes an entire Discovery Log page entry to aim to
be compatible with other transports in the future. When a remote
controller is connected to via a Discovery Log page entry (nvmecontrol
connect-all), the raw entry is used. When a remote controller is
connected to via an explicit address, an entry is synthesized from the
parameters.
Note that this is an ABI break for the ioctls used by nvmf(4). Since
this is only present in main I did not bother implementing
compatability shims.
Sponsored by: Chelsio Communications