From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?ISO-8859-1?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com>
Subject: Re: [PATCH v1 07/12] libxl: add prepare/unprepare
 operations to the libxl public interface
Date: Fri, 15 Mar 2013 12:42:46 +0100
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On 15/03/13 12:33, Roger Pau Monn=E9 wrote:
> The caller should take care of this states by himself (just as we do
> with add or remove), so it knows if the device has been prepared or not.

Just as a clarification, the way to know if a device has been prepared
but not added is to look for the xenstore entries. If the device only has

/libxl/<domid>/hotplug/status/<devid>/

then it has been prepared but not added, on the other hand, if the
device has the above xenstore path, and also

/local/domain/<domid>/device/vbd/<devid>/backend

then it has been prepared and added. But I can't come up with any reason
a libxl user should look at this paths by himself.