netdev - Re: [PATCH net-next v12 06/11] vxlan: add ipv6 support

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Date:	Mon, 02 Sep 2013 09:17:48 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Stephen Hemminger <stephen@...workplumber.org>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	David Stevens <dlstevens@...ibm.com>
Subject: Re: [PATCH net-next v12 06/11] vxlan: add ipv6 support

On Sat, 2013-08-31 at 10:27 -0700, Stephen Hemminger wrote:
> On Sat, 31 Aug 2013 13:44:33 +0800
> Cong Wang <amwang@...hat.com> wrote:
> 
> > +#if IS_ENABLED(CONFIG_IPV6)
> > +	} else {
> > +		ipv6_stub->ipv6_sock_mc_join(sk, ifindex,
> > +					     &ip->sin6.sin6_addr);
> > +#endif
> 
> This isn't safe against IPv6 module getting unloaded. You either
> have to figure out a reference count method, or disable IPv6
> module unload.
> 
> Since it can only be forced unload anyway, I still argue
> it should just be disabled (by removing the module exit hook
> and code).

I will send a patch to remove ipv6 module exit code, since there is
other problem too.

Thanks!

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