Re: [Xen-devel] Where can I find some tutorial or manual on how to use xenstore?

[Nick Logan <nick_logan@xxxxxxxxxxxx>]

Thanks Ewan,

See below.

Cheers,

Nick

Ewan Mellor wrote:

> On Wed, Jun 28, 2006 at 12:08:33PM +0100, Nick Logan wrote:
>
>  
>
> > It's certainly possible, I've used this code as the basis for a new 
> > driver, which is similar to the vbd driver. The driver starts fine but I 
> > am unable to have it participate in a domain save/restore. I guess that 
> > this is because xend is not aware of  the new driver and the open 
> > devices supported by this driver and hence the driver does not receive 
> > resume calls when the domain is restored..
> > Is there any way that a new driver can make it's existance known to xend?
> >    
> If you've managed to get the driver to start through xend, I'd be surprised if
> it's xend's fault that save/restore does not work.
>  
The driver was started outside of xend, using a varient of Jacob's 
buscreate program to set the necessary values in xenstore. As this a 3rd 
party driver, I'm looking for a solution that does not involve xm or 
xend changes, if that's possible. I'll take a look at the blktap patches 
to see if that helps.
> In any case, the main driver integration point is at the bottom of
> tools/python/xen/xend/XendDomainInfo.py, where you can register a subclass of
> xen.xend.server.DevController.py to manage the device.  You also need to make
> sure that the driver's config is parsed properly by xm.
>
> Take a look at Julian Chesterfield and Andrew Warfield's recent blktap patches
> to see how driver tool integration is done:
>
> http://lists.xensource.com/archives/html/xen-devel/2006-06/msg00738.html
>
> Cheers,
>
> Ewan.
>  
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