Re: [PATCH 2/3] xen: return xenstore command failures via response instead of rc

[Boris Ostrovsky]

On 12/22/2016 10:55 AM, Juergen Gross wrote:
> On 22/12/16 16:49, Boris Ostrovsky wrote:
>> On 12/22/2016 02:19 AM, Juergen Gross wrote:
>>> When the xenbus driver does some special handling for a Xenstore
>>> command any error condition related to the command should be returned
>>> via an error response instead of letting the related write operation
>>> fail. Otherwise the user land handler might take wrong decisions
>>> assuming the connection to Xenstore is broken.
>> Do we expect the user to always read the reply if no error code was
>> returned?
> Absolutely, yes. This is how error reporting of Xenstore is
> working.

Oh, right --- I was thinking about the string that you are passing back
but not the message type (XS_ERROR).

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>