Re: Where can I find some tutorial or manual on how to use xenstore?

[Nick Logan <nick_logan@symantec.com>]

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.
>  
>