Daniel P. Berrange wrote:
On Mon, Mar 05, 2007 at 05:22:28PM +0000, Richard W.M. Jones wrote:The current vshInit function in virsh tries some dodgy heuristics to see if it should connect readonly or read/write to the hypervisor. Unfortunately these heuristics fail, eg. when you have a root-owned system-wide qemud, and a user trying to run virsh as non-root.This patch removes the heuristics and replaces them with a simple -r | --readonly flag on the command line. If omitted, we try to connect read/write, otherwise we try to connect readonly.I like this patch, but I don't think we can apply it in exactly the form it is now. There may well be people already using virsh in a non-root context with Xen, and this will break them requiring them to add a --readonly arg in. I think we should add the explicit--readonly flag patch attached, but also put in a simplified heuristic for the Xen non-root case. I'd think I'd add in a snippet of code looking like:if (ctl->uid != 0 && (ctl->name == NULL || !strcmp(ctl->name, "Xen"))ctl->readonly = TRUE; If people agree, I'll apply Rich's patch with this addition ?
Agreed, unless we want an explicit --readwrite to override this heuristic :-)
Rich. -- Emerging Technologies, Red Hat http://et.redhat.com/~rjones/ 64 Baker Street, London, W1U 7DF Mobile: +44 7866 314 421 "[Negative numbers] darken the very whole doctrines of the equations and make dark of the things which are in their nature excessively obvious and simple" (Francis Maseres FRS, mathematician, 1759)
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