linux-kernel - Re: [PATCH] net-next: make sock diag per-namespace

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Message-ID: <20120716123815.GA1178@avaginn.sw.ru>
Date:	Mon, 16 Jul 2012 16:38:15 +0400
From:	Andrew Vagin <avagin@...allels.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Andrew Vagin <avagin@...nvz.org>,
	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	Pavel Emelianov <xemul@...allels.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH] net-next: make sock diag per-namespace

On Mon, Jul 16, 2012 at 04:32:25PM +0400, Eric Dumazet wrote:
> On Mon, 2012-07-16 at 16:14 +0400, Andrew Vagin wrote:
> > Before this patch sock_diag works for init_net only and dumps
> > information about sockets from all namespaces.
> 
> ...
> 
> > diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
> > index a7f86a3..52f42f9 100644
> > --- a/net/ipv4/udp_diag.c
> > +++ b/net/ipv4/udp_diag.c
> > @@ -34,6 +34,7 @@ static int udp_dump_one(struct udp_table *tbl, struct sk_buff *in_skb,
> >  	int err = -EINVAL;
> >  	struct sock *sk;
> >  	struct sk_buff *rep;
> > +	struct net *net = sock_net(in_skb->sk);
> >  
> >  	if (req->sdiag_family == AF_INET)
> >  		sk = __udp4_lib_lookup(&init_net,
> 
> It seems you didnt fix udp_dump_one() correctly, since it
> still mentions &init_net
You are right. Sorry for this stupid fault. I will send a new patch.
> 
> > @@ -75,7 +76,7 @@ static int udp_dump_one(struct udp_table *tbl, struct sk_buff *in_skb,
> >  		kfree_skb(rep);
> >  		goto out;
> >  	}
> > -	err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid,
> > +	err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).pid,
> >  			      MSG_DONTWAIT);
> >  	if (err > 0)
> >  		err = 0;
> 
> udp_dump() also needs some care ?
> 
> 
Yes
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