netdev - Re: wireless netns work

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Message-Id: <1245362805.6495.3.camel@johannes.local>
Date:	Fri, 19 Jun 2009 00:06:45 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	"Luis R. Rodriguez" <mcgrof@...il.com>
Cc:	Nick Kossifidis <mickflemm@...il.com>,
	Georgy Berdyshev <codingmaster@...il.com>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: wireless netns work

On Thu, 2009-06-18 at 15:04 -0700, Luis R. Rodriguez wrote:
> On Thu, Jun 18, 2009 at 2:48 PM, Johannes Berg<johannes@...solutions.net> wrote:
> > On Thu, 2009-06-18 at 14:43 -0700, Luis R. Rodriguez wrote:
> >
> >> For example, I see you used mac80211_hwsim and was able to use two
> >> wlan interfaces to talk to each other. This seems great for testing
> >> purposes but it remains unclear to me the advantage of testing with
> >> separate namespaces vs creating two wlan interfaces on one namespace
> >> with mac80211_hwsim.
> >
> > You cannot ping within one namespace and have the packets actually flow
> > over the virtual 'air'.
> 
> I see, thanks! How does using a separate namespace fix this limitation?

Well that's the magic ;) Think of it as having one copy of the
networking stack per netns.

johannes

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