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Re: [Xen-devel] Q: How to find own domid or uuid from domU?

On 18 May 2006, at 10:46, Markus Armbruster wrote:

I can map from domid to uuid by reading /local/domain/DOMID/vm.

I got that to work by trying DOMIDs starting with 0 until the read
succeeds, but that's kind of gross.

I can think of some less gross methods to find my domid, but I'd still
be glad to hear suggestions.

Don't use DOMID. It can change across save/restore and migration.

Would you like to have an interface for obtaining one's UUID?  What
about adding a XENVER_get_uuid code to HYPERVISOR_xen_version()?

That might be okay, although even that might appear to change if we implement things like VM fork in future.

Why does your guest need to know its ID?

 -- Keir

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