From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH v2 COLOPre 09/13] tools/libxl: Update
 libxl_save_msgs_gen.pl to support return data from xl to xc
Date: Tue, 16 Jun 2015 11:49:15 +0100
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To: Yang Hongyang <yanghy@cn.fujitsu.com>, ian.jackson@eu.citrix.com
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On Mon, 2015-06-08 at 11:43 +0800, Yang Hongyang wrote:
> From: Wen Congyang <wency@cn.fujitsu.com>
> 
>  Currently, all callbacks return an integer value or void. We cannot
>  return some data to xc via callback. Update libxl_save_msgs_gen.pl
>  to support this case.

(Odd two space indent from somewhere)

Can you be more specific about what kind of data you need to pass back
here? Is it an opaque "void *" blob or is it potentially more
structured? That is useful to know in case there might be a better way
to achieve the goal.

Ian.