renaming dynamic sdev nodes is problematic
There are a lot of problems with renaming dyanmic nodes. The least of which is whether or not it makes any sense. The point of dynamic nodes is that they are not managed, moved, and manipulated (outside of permissions) by the user and rather by the subsystem in question. As such the right thing to do here is to actually forbid rename of dynamic nodes, much as we forbid other operations on them.