Just to be sure (and so that I don't have to test
it here :) ): When this
patch is applied, batadv_softif_create would already fail when the two
namespaces have a batadv interface with the same name because the debugfs
function would fail. But it would work when the batman-adv interfaces + the
slave interfaces (for per-slave interface information) have different names.
That is correct. As far as i remember, it failed in a good way,
i.e. not an opps. Which is why i put this patch first. We could swap
the order, have the debugfs patch first, but i though the 'why' of the
debugfs patch is probably clearer to somebody who has just reviewed
this patch first.
It is currently not prevented that a slave device
changes the namespace after
it was added. But this should not be a problem because the device will be
first removed from the original namespace (so it will be removed from batX)
and later added to the target namespace (see dev_change_net_namespace).
Yes, and this is the same mechanism used for other master devices,
like bridges, teams/bonding. The slave is hot-unplugged from one name
space and hot-plugged into another name space.
Reviewed-by: Sven Eckelmann <sven(a)narfation.org>