The udev based interface backend did not allow querying data over a read-only connection which is different than how the netcf backend operates. This brings the behavior inline with the default, netcf backend. --- src/interface/interface_backend_udev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/interface/interface_backend_udev.c b/src/interface/interface_backend_udev.c index 68e1e2f..95034bf 100644 --- a/src/interface/interface_backend_udev.c +++ b/src/interface/interface_backend_udev.c @@ -139,7 +139,7 @@ udevInterfaceOpen(virConnectPtr conn, { struct udev_iface_driver *driverState = NULL; - virCheckFlags(0, VIR_DRV_OPEN_ERROR); + virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR); if (VIR_ALLOC(driverState) < 0) { virReportOOMError(); -- 1.8.1.5