Re: [PATCH v6 0/3] libxenvchan: interdomain communications library

From: Daniel De Graaf <dgdegra@tycho.nsa.gov>
To: Vasiliy Tolstov <v.tolstov@ghs.l.google.com>
Cc: Ian.Campbell@eu.citrix.com, xen-devel@lists.xensource.com,
	Ian.Jackson@eu.citrix.com, konrad.wilk@oracle.com,
	Stefano.Stabellini@eu.citrix.com
Subject: Re: [PATCH v6 0/3] libxenvchan: interdomain communications library
Date: Fri, 30 Sep 2011 10:40:11 -0400	[thread overview]
Message-ID: <4E85D4CB.80009@tycho.nsa.gov> (raw)
In-Reply-To: <CACaajQtCMpWuqH8PGhwK-WGC=bXRiE1an+2sWcm2JaozK7BK=w@mail.gmail.com>

On 09/30/2011 04:28 AM, Vasiliy Tolstov wrote:
> 2011/9/30 Vasiliy Tolstov <v.tolstov@selfip.ru>
> 
>>
>>
>> 2011/9/23 Daniel De Graaf <dgdegra@tycho.nsa.gov>
>>
>>> Changes since v5:
>>>  - Unify gntdev osdep interface
>>>  - Eliminate notify_result and revert mapping if notify ioctl fails
>>>  - Rename functions and structures to libxenvchan
>>>  - Use application-specified xenstore path for ring/event data
>>>  - Enforce maximum ring size of 2^20 bytes on client
>>>  - Change to LGPL 2.1
>>>
>>> [PATCH 1/3] libxc: add xc_gnttab_map_grant_ref_notify
>>> [PATCH 2/3] libxc: add xc_gntshr_* functions
>>> [PATCH 3/3] libvchan: interdomain communications library
>>>
>>>
>>>
>> Hello. Sorry for bumping..
>> What version of xen kernel i need to use this library? Now i have 2.6.32.26
>> in many domUs.
>> And what i need in dom0 for that, if i want to communicate via libxenvchan
>> from domU to dom0?
>>
>>
>>
> And where i can find latest version of the patch?
> 

This library depends on gntdev for the client and gntalloc for the server;
these were merged in 2.6.39. The client can be used with 2.6.32.x kernels
however it is not possible to detect when a peer crashes or exits without
calling libxenvchan_close() on that kernel.

This library does not require that either peer is dom0; it can be used for
both domU-domU and domU-dom0 communication.

The latest version of the patch can be found in the xen-devel archives.

-- 
Daniel De Graaf
National Security Agency