Re: [Xen-devel] XenStore permissions from kernel space

[NAHieu <nahieu@xxxxxxxxx>]

Hi James,

On 6/15/06, James Pendergrass <james.pendergrass@xxxxxxxxxx> wrote:
> Hello,
> I've been working on a kernel module that shares some pages between
> to domUs.
> In the course of doing this I had the need to communicate information
> via XenStore (e.g., the grant references),
> but for a number of reasons did not want to use the full XenBus
> registration/probe/hotplug...system (it is too dynamic,
> and requires a kick off event from dom0 rather than allowing self
> organizing shares between domUs).
>
> I established that the only thing preventing my setup of domA writing
> to a node in XenStore and domB reading it
> was the lack of the xs_get/set_permissions function in the kernel
> level xenbus/xenstore interface.  So I ported those
> functions down from the userland xenstore libraries.
You mean you want any domU to read any other domU's information
(stored in XenStore)? I doubt that is not a good idea because of
potential security problems.

Any ideas?

Thanks,
H

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