Re: [PATCH net-next 5/6] selftests: drv-net: add netkit devmem RX test

[Bobby Eshleman]

On Tue, Mar 17, 2026 at 05:08:20PM -0700, Stanislav Fomichev wrote:
> On 03/16, Bobby Eshleman wrote:
> > From: Bobby Eshleman <bobbyeshleman@xxxxxxxx>
> > 
> > Add tests for devmem RX over a netkit device with a leased queue. This
> > is the same as the other devmem RX test except for ncdevmem executes in
> > a namespace, binds to a netkit, and skips the ethtool NIC configuration
> > steps (relying on the test runner for that setup).
> > 
> > The RX path is setup as the following:
> > 
> >  RX Path
> >  -------
> > 
> >  Remote            Physical NIC          Netkit Host        Netkit Guest (netns)
> >    |                    |                     |                    |
> >    |--- TCP send ------>|                     |                    |
> >                         |-------------------->|                    |
> >                       dmabuf                  |--- BPF redirect -->|
> > 
> 
> Is it too messy to parametrize the existing test to run both with and
> without the namespaces? Feels like should be somewhat doable in python?

IIUC, we could have main() do something like:

for env [NetDrvContEnv, NetDrvEpEnv]:
    with env as cfg:
        [...]
        ksft_run(tests, args=(cfg,))


And then the tests could call helpers that check cfg.netns to use the
nk_{guest,host}_ip6 addresses when true, otherwise use the regular
addresses?

It should be doable if I'm following your drift.

Best,
Bobby