Re: [Xen-devel] domU reading its own xenstore home directory from userspace

[Anthony Liguori <aliguori@xxxxxxxxxx>]

This documentation is old and at the time referred to the Xenbus code, 
not the userspace interface (there wasn't even such an interface at the 
time).
Are you having problems using libxenstore from within a domU on recent 
builds?
Regards,

Anthony Liguori

Andrew D. Ball wrote:

> What does this statement in the xenbus documentation on the xen wiki
> mean: "The DomU kernel interface is structured in such a way that nodes
> in the "home directory" of the domain cannot be addressed, and therefore
> cannot be read from or written to. Tools may use this space to store
> data that should not be accessed by the domain itself." ?
> [ from http://wiki.xensource.com/xenwiki/XenBus , toward the bottom ]
>
> I thought domU kernels must read data in the domU's home directory or is
> the data that drivers watch somewhere else?
>
> I want to read this data from domU userspace that that a domU can find
> out what it's UUID is.  This is important for correlating domU's with
> the dom0's they run on for management tools.  Reading a UUID from a
> domU's xenstore home directory from domU userspace is the cleanest way
> to do this that I can think of at the moment.
>
> Thanks for your help.
>
> Andrew
>
>
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