netdev - Re: [PATCH] wireless extensions: play with netns

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Date:	Thu, 18 Jun 2009 02:35:21 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	John Linville <linville@...driver.com>,
	Netdev <netdev@...r.kernel.org>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...stanetworks.com>,
	Alexey Dobriyan <adobriyan@...il.com>
Subject: Re: [PATCH] wireless extensions: play with netns

On Wed, 2009-06-17 at 17:27 -0700, Eric W. Biederman wrote:

> > Subject: genetlink: make netns aware
> >
> > This makes generic netlink network namespace aware.
> > No actual generic netlink families are made namespace
> > aware, they need to be checked one by one and then
> > set the family->netnsok member to true.
> 
> Are skb_clone and nlmsg_multicast really guaranteed not to sleep?

Yes, definitely, we call them in atomic callbacks already in various
places. There are many callers that use the existing genlmsg_multicast()
in atomic contexts.

johannes

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