from a given dbcontext...you can do this
var mw = ((IObjectContextAdapter)context).ObjectContext.MetadataWorkspace;
see this https://msdn.microsoft.com/en-us/library/system.data.metadata.edm.metadataworkspace_methods(v=vs.110).aspx
to access the Storage Model you can do this:
var sSpaceEntities = (StoreItemCollection)mw.GetItemCollection(DataSpace.SSpace);
se this for DataSpace avaiables https://msdn.microsoft.com/en-us/library/system.data.metadata.edm.dataspace(v=vs.110).aspx
and you can play around with this objects while debbuging, there is a lot of information you can find.