netdev - [PATCH 10/11] [NETNS]: Create tcp control socket in the each namespace.

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Date:	Fri, 28 Mar 2008 12:08:57 +0300
From:	"Denis V. Lunev" <den@...nvz.org>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, containers@...ts.osdl.org,
	"Denis V. Lunev" <den@...nvz.org>
Subject: [PATCH 10/11] [NETNS]: Create tcp control socket in the each namespace.

Signed-off-by: Denis V. Lunev <den@...nvz.org>
---
 include/net/netns/ipv4.h |    1 +
 net/ipv4/tcp_ipv4.c      |   26 ++++++++++++++++++++++++--
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index af685f7..34ee348 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -28,6 +28,7 @@ struct netns_ipv4 {
 	struct sock		*fibnl;
 
 	struct sock		**icmp_sk;
+	struct sock		*tcp_sock;
 
 	struct netns_frags	frags;
 #ifdef CONFIG_NETFILTER
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 2ee7fb9..14944af 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2491,11 +2491,33 @@ struct proto tcp_prot = {
 	REF_PROTO_INUSE(tcp)
 };
 
+
+static int __net_init tcp_sk_init(struct net *net)
+{
+	int err;
+	err = inet_csk_ctl_sock_create(&net->ipv4.tcp_sock,
+				       PF_INET, SOCK_RAW, IPPROTO_TCP);
+	if (err < 0)
+		return err;
+	sk_change_net(net->ipv4.tcp_sock, net);
+	return 0;
+}
+
+static void __net_exit tcp_sk_exit(struct net *net)
+{
+	sk_release_kernel(net->ipv4.tcp_sock);
+}
+
+static struct pernet_operations __net_initdata tcp_sk_ops = {
+       .init = tcp_sk_init,
+       .exit = tcp_sk_exit,
+};
+
 void __init tcp_v4_init(void)
 {
-	if (inet_csk_ctl_sock_create(&tcp_sock, PF_INET, SOCK_RAW,
-				     IPPROTO_TCP) < 0)
+	if (register_pernet_device(&tcp_sk_ops))
 		panic("Failed to create the TCP control socket.\n");
+	tcp_sock = init_net.ipv4.tcp_sock;
 }
 
 EXPORT_SYMBOL(ipv4_specific);
-- 
1.5.3.rc5

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