[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xenstore -- read UUID
Hi Dinesh, On Wed, Sep 10, 2008 at 1:24 AM, dinesh chandrasekaran <dinesh_chan8@xxxxxxxxxxx> wrote: > they were 2 seperate questions... sorry for the typos... > How to access xenstore from Dom-0? -- which you said 'YES'... Yes, this is certainly possible: your code should work (I haven't tested it) in Dom0 user-space. For another example, see tools/xenstore/xsls.c, which implements ls functionality for xenstore using the same interface. > And How to access xenstore from hypervosor? There is no code to do this in Xen at the moment. > If the hypervisor has no knowledge about XenStore, Dom-0 must have the full > control over the xenstore. Correct. XenStore is simply implemented as a user-space daemon (xenstored), running as root in Dom0. > I need to build a table with some fields one of which should never change > during a VMs lifetime. > For example, if I chose the domain_id whose value is transient, If the VM > reboots, its domain_id changes. > That is the reason why I opted for the UUID of a domain that persists over > time even after migration to another machine. > The only way I could get a domain's UUID is through the xenstore and want to > take away domain-0 from the picture, which > according to you is almost impossible. Instead of Dom0, you could possibly do this in a stubdomain. It is possible to access XenStore from a MiniOS-based domain. Regards, Derek Murray. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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