Re: [Xen-devel] [PATCH] xenbus: Add support for xenbus backend in stub domain

[Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>]

On 01/18/2012 07:07 AM, Ian Campbell wrote:
> On Thu, 2012-01-12 at 23:36 +0000, Daniel De Graaf wrote:
>> This adds an ioctl to the /dev/xen/xenbus_backend device allowing the
>> xenbus backend to be started after the kernel has booted. This is
>> intended to allow dom0 to start another domain to run xenstore.
> 
> Does this new ioctl need to be made oneshot? What happens if you call it
> twice?
> 
> Also it should be disabled once a local xenstored has connected
> shouldn't it?
> 
> Diego's original patch handled that sort of thing, any reason not to
> simply forward port it?
> 

My original patch was trying to be more flexible in allowing xenstored
to be created later (migrating watches), or restarted in a different
domain. However, since the current version lacks that ability the
oneshot safeguards from Diego's patch should probably be added.

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