[Xen-devel] XenStore permissions from kernel space

[James Pendergrass <james.pendergrass@xxxxxxxxxx>]

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.

I expect that others may appreciate the ability to set XenStore perms  
from kernel space, so here's a patch.
-J. Aaron pendergrass

xenstore_perms_kernel.patch
Description: Binary data

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