[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-users] Find domID from domU

  • To: "Pepe Barbe" <elventear@xxxxxxxxx>
  • From: "Todd Deshane" <deshantm@xxxxxxxxx>
  • Date: Thu, 8 May 2008 20:11:05 -0400
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 08 May 2008 17:11:34 -0700
  • Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=Jif11t9tcG2VgZhFhHXHaADpE42++0DdRF3mq4qevziWQjS15mTbkfLBZLl3idaqnecvvKmkcfZkdfGYHaQF+b4Kef1nsMCi9okH4TigxxSmz8ZCwPxg0OWFFboLseyH5eo9+sqYciOUpHb3LOhSHpwpNiCsJ8dsvFfoeJFL2cc=
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

On Thu, May 8, 2008 at 4:38 PM, Pepe Barbe <elventear@xxxxxxxxx> wrote:
> Hello,
>  I am trying to write a script to add to the proper bridge any vif that is
> brought up trying to use a domU as a backend.
>  After much researching, I don't know if I have found the proper solution
> but, at least, a viable one.
>  I see that I can read the bridge name in xenstore from the following key:
>  /local/domain/<domid>/backend/vif/<vif num>/bridge
>  But I have found two obstacles to this solution.
>  First, by default a domU cannot list /local/domain, so the only way to find
> my domID would be to guess, up to the maximum number of domain IDs that Xen
> can have, which is a horrid solution. I can change the permissions so that
> key can be listed, and then I can try to read the different domain IDs until
> one succeeds, which would be a better way of guessing my own domID.
>  So my question is. Is there a deterministic way of reading the proper key
> /local/domain/<domid>/backend/vif/<vif num>/bridge from the domU, or a way
> to determine my domID in a deterministic fashion or change the the default
> permissions, so that if I ever reboot my dom0 I can bring everything back
> automatically.

I am not sure if this exactly answers your question, but might be along the
lines that you are looking for.



Xen-users mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.