Re: [PATCH v7 10/33] net: dummy - set name assign type

From: BjÃrn Mork
Date: Thu Jul 10 2014 - 05:33:47 EST

Tom Gundersen <teg@xxxxxxx> writes:

> A fixed number of indistinguishable dummy devices are allocated at module init time,
> the names are therefore PREDICTABLE rather than ENUM.

OK? So if I go do

modprobe dummy numdummies=2
ip link add type dummy
ip link add type dummy

then I'd have dummy0 and dummy1 with NET_NAME_PREDICTABLE, but dummy2 and
dummy3 with NET_NAME_ENUM (from your rtnetlink patch).

I think this just demonstrates that there aren't that many different
name types. There is no real difference between your NET_NAME_ENUM and
NET_NAME_PREDICTABLE, resulting in arbitrary choices like this one.

The same goes for NET_NAME_USER and NET_NAME_RENAMED. These are the same
from a kernel point of view. If userspace wants to keep track of device
name history then it is free to do so without any need for a RENAMED

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