Re: CVS commit: src/sys/net

[Martin Husemann <martin%duskware.de@localhost>]

On Mon, Dec 01, 2014 at 11:54:23AM +0900, Ryota Ozaki wrote:
> BTW, we may need ATF tests to ring the bell for such regressions.

This is a bit tricky to do as we do not expose a sane api to create
"old binaries" from source. It would boil down to copy & paste of the old
structure definition and some magic to test ioctls with them.

Testing the ioctls itself against a rump kernel is very simple.

But then you'll have to install helpers (like rump.ifconfig but for various
ioctl versions) and it quickly gets messy.

So no easy/safe/scalable way there that I can see. The other option that 
comes to mind is running a -current kernel and doing a -7 and -6 release
branch test run. Unfortunately that will include all RUMP components from that
branch as well, so not test the compatibility we are looking for either.

But I guess we should think about rearrangements in this direction to make
it easier in the future - starting with a separate rump.tgz set, or maybe
a few of them, not sure what granularity would be needed there.

Antti, Justin, can we separate the rump userland from the rump kernel
binaries easily and put them in different sets, and then run the userland
from -6 or -7 against the (rump-)kernel from -current?

Martin