Subject: Re: [RFC] mac80211: disallow bridging managed/adhoc interfaces

From: Stephen Hemminger <[email-masked]>
Date: Tue, 17 Nov 2009 08:37:41 -0800

On Tue, 17 Nov 2009 15:07:48 +0100
Johannes Berg <[email-masked]> wrote:

> On Tue, 2009-11-17 at 15:04 +0100, Michael Buesch wrote:
> > On Tuesday 17 November 2009 14:46:25 Johannes Berg wrote:
> > > --- wireless-testing.orig/net/bridge/br_if.c	2009-11-17 14:19:17.000000000 +0100
> > > +++ wireless-testing/net/bridge/br_if.c	2009-11-17 14:20:03.000000000 +0100
> > > @@ -390,6 +390,10 @@ int br_add_if(struct net_bridge *br, str
> > >  	if (dev->br_port != NULL)
> > >  		return -EBUSY;
> > >  
> > > +	/* No bridging devices that dislike that (e.g. wireless) */
> > > +	if (dev->priv_flags & IFF_DONT_BRIDGE)
> > > +		return -EINVAL;
> > 
> > -EOPNOTSUPP?
> > That would probably produce a better error message in userspace.

But there are people bridging wireless, and hostap even has a mode for
that. Especially people are bridging to wireless when the other interfaces
are VMs.

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