[NETNS]: separate af_packet netns data

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/net_namespace.h

@@ -9,6 +9,7 @@
 #include <linux/list.h>
 
 #include <net/netns/unix.h>
+#include <net/netns/packet.h>
 
 struct proc_dir_entry;
 struct net_device;
@@ -43,10 +44,7 @@ struct net {
 	struct ctl_table_header	*sysctl_core_hdr;
 	int			sysctl_somaxconn;
 
-	/* List of all packet sockets. */
-	rwlock_t		packet_sklist_lock;
-	struct hlist_head	packet_sklist;
-
+	struct netns_packet	packet;
 	struct netns_unix	unx;
 };
 

include/net/netns/packet.h

@@ -0,0 +1,15 @@
+/*
+ * Packet network namespace
+ */
+#ifndef __NETNS_PACKET_H__
+#define __NETNS_PACKET_H__
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+
+struct netns_packet {
+	rwlock_t		sklist_lock;
+	struct hlist_head	sklist;
+};
+
+#endif /* __NETNS_PACKET_H__ */

net/packet/af_packet.c

@@ -803,9 +803,9 @@ static int packet_release(struct socket *sock)
 	net = sk->sk_net;
 	po = pkt_sk(sk);
 
-	write_lock_bh(&net->packet_sklist_lock);
+	write_lock_bh(&net->packet.sklist_lock);
 	sk_del_node_init(sk);
-	write_unlock_bh(&net->packet_sklist_lock);
+	write_unlock_bh(&net->packet.sklist_lock);
 
 	/*
 	 *	Unhook packet receive handler.
@@ -1015,9 +1015,9 @@ static int packet_create(struct net *net, struct socket *sock, int protocol)
 		po->running = 1;
 	}
 
-	write_lock_bh(&net->packet_sklist_lock);
-	sk_add_node(sk, &net->packet_sklist);
-	write_unlock_bh(&net->packet_sklist_lock);
+	write_lock_bh(&net->packet.sklist_lock);
+	sk_add_node(sk, &net->packet.sklist);
+	write_unlock_bh(&net->packet.sklist_lock);
 	return(0);
 out:
 	return err;
@@ -1452,8 +1452,8 @@ static int packet_notifier(struct notifier_block *this, unsigned long msg, void
 	struct net_device *dev = data;
 	struct net *net = dev->nd_net;
 
-	read_lock(&net->packet_sklist_lock);
-	sk_for_each(sk, node, &net->packet_sklist) {
+	read_lock(&net->packet.sklist_lock);
+	sk_for_each(sk, node, &net->packet.sklist) {
 		struct packet_sock *po = pkt_sk(sk);
 
 		switch (msg) {
@@ -1492,7 +1492,7 @@ static int packet_notifier(struct notifier_block *this, unsigned long msg, void
 			break;
 		}
 	}
-	read_unlock(&net->packet_sklist_lock);
+	read_unlock(&net->packet.sklist_lock);
 	return NOTIFY_DONE;
 }
 
@@ -1862,7 +1862,7 @@ static inline struct sock *packet_seq_idx(struct net *net, loff_t off)
 	struct sock *s;
 	struct hlist_node *node;
 
-	sk_for_each(s, node, &net->packet_sklist) {
+	sk_for_each(s, node, &net->packet.sklist) {
 		if (!off--)
 			return s;
 	}
@@ -1872,7 +1872,7 @@ static inline struct sock *packet_seq_idx(struct net *net, loff_t off)
 static void *packet_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	struct net *net = seq_file_net(seq);
-	read_lock(&net->packet_sklist_lock);
+	read_lock(&net->packet.sklist_lock);
 	return *pos ? packet_seq_idx(net, *pos - 1) : SEQ_START_TOKEN;
 }
 
@@ -1881,14 +1881,14 @@ static void *packet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 	struct net *net = seq->private;
 	++*pos;
 	return  (v == SEQ_START_TOKEN)
-		? sk_head(&net->packet_sklist)
+		? sk_head(&net->packet.sklist)
 		: sk_next((struct sock*)v) ;
 }
 
 static void packet_seq_stop(struct seq_file *seq, void *v)
 {
 	struct net *net = seq->private;
-	read_unlock(&net->packet_sklist_lock);
+	read_unlock(&net->packet.sklist_lock);
 }
 
 static int packet_seq_show(struct seq_file *seq, void *v)
@@ -1940,8 +1940,8 @@ static const struct file_operations packet_seq_fops = {
 
 static int packet_net_init(struct net *net)
 {
-	rwlock_init(&net->packet_sklist_lock);
-	INIT_HLIST_HEAD(&net->packet_sklist);
+	rwlock_init(&net->packet.sklist_lock);
+	INIT_HLIST_HEAD(&net->packet.sklist);
 
 	if (!proc_net_fops_create(net, "packet", 0, &packet_seq_fops))
 		return -ENOMEM;