netdev - Re: [PATCH wpan-next 01/20] net: mac802154: Allow the creation of coordinator interfaces

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Message-ID: <CAK-6q+gZ5fSdNptvQoKpf1SOqODv70gzbFTYyWBagC6AFtAkig@mail.gmail.com>
Date:   Sun, 28 Aug 2022 22:31:19 -0400
From:   Alexander Aring <aahringo@...hat.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        linux-wpan - ML <linux-wpan@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Network Development <netdev@...r.kernel.org>,
        David Girault <david.girault@...vo.com>,
        Romuald Despres <romuald.despres@...vo.com>,
        Frederic Blain <frederic.blain@...vo.com>,
        Nicolas Schodet <nico@...fr.eu.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH wpan-next 01/20] net: mac802154: Allow the creation of
 coordinator interfaces

Hi,

On Fri, Aug 26, 2022 at 4:08 AM Miquel Raynal <miquel.raynal@...tlin.com> wrote:
...
> >
> > I need to say that I really used multiple monitors at the same time on
> > one phy only and I did that with hwsim to run multiple user space
> > stacks. It was working and I was happy and didn't need to do a lot of
> > phy creations in hwsim.
>
> Indeed, looking at the code, you could use as many MONITOR interfaces
> you needed, but only a single NODE. I've changed that to use as many
> NODE and COORD that we wish.
>

Be careful there, there is a reason why we don't allow this and this
has to do with support of multiple address filters... but here it
depends also what you mean with "use".

I need to admit, you can achieve the same behaviour of multiple user
space stacks and one monitor, _but_ you can easily filter the traffic
if you do it per interface...

- Alex