Merge branch 'net-2.6.26-netns-20080326' of git://git.linux-ipv6.org/gitroot/yoshfuji/linux-2.6-dev

10 files changed, 119 insertions, 14 deletions

diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index da05ab47ff2..7009b0cdd06 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -70,13 +70,13 @@ static inline void ipv4_devconf_setall(struct in_device *in_dev)
 	ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val))
 
 #define IN_DEV_ANDCONF(in_dev, attr) \
-	(IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr) && \
+	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
 	 IN_DEV_CONF_GET((in_dev), attr))
 #define IN_DEV_ORCONF(in_dev, attr) \
-	(IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr) || \
+	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
 	 IN_DEV_CONF_GET((in_dev), attr))
 #define IN_DEV_MAXCONF(in_dev, attr) \
-	(max(IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr), \
+	(max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
 	     IN_DEV_CONF_GET((in_dev), attr)))
 
 #define IN_DEV_FORWARD(in_dev)		IN_DEV_CONF_GET((in_dev), FORWARDING)
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index c9ba0da16ce..b90d3d461d4 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -481,7 +481,7 @@ static inline struct raw6_sock *raw6_sk(const struct sock *sk)
 #endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
 
 #define INET6_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif)\
-	(((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))	&& \
+	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)	&& \
 	 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports))  	&& \
 	 ((__sk)->sk_family		== AF_INET6)		&& \
 	 ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr))	&& \
@@ -489,7 +489,7 @@ static inline struct raw6_sock *raw6_sk(const struct sock *sk)
 	 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
 
 #define INET6_TW_MATCH(__sk, __net, __hash, __saddr, __daddr, __ports, __dif) \
-	(((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))	&& \
+	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)	&& \
 	 (*((__portpair *)&(inet_twsk(__sk)->tw_dport)) == (__ports))	&& \
 	 ((__sk)->sk_family	       == PF_INET6)			&& \
 	 (ipv6_addr_equal(&inet6_twsk(__sk)->tw_v6_daddr, (__saddr)))	&& \
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index ced61f87660..d146be40f46 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -708,8 +708,10 @@ struct net_device
 	void                    (*poll_controller)(struct net_device *dev);
 #endif
 
+#ifdef CONFIG_NET_NS
 	/* Network namespace this network device is inside */
 	struct net		*nd_net;
+#endif
 
 	/* bridge stuff */
 	struct net_bridge_port	*br_port;
@@ -737,6 +739,27 @@ struct net_device
 #define	NETDEV_ALIGN		32
 #define	NETDEV_ALIGN_CONST	(NETDEV_ALIGN - 1)
 
+/*
+ * Net namespace inlines
+ */
+static inline
+struct net *dev_net(const struct net_device *dev)
+{
+#ifdef CONFIG_NET_NS
+	return dev->nd_net;
+#else
+	return &init_net;
+#endif
+}
+
+static inline
+void dev_net_set(struct net_device *dev, const struct net *net)
+{
+#ifdef CONFIG_NET_NS
+	dev->nd_dev = net;
+#endif
+}
+
 /**
  *	netdev_priv - access network device private data
  *	@dev: network device
@@ -813,7 +836,7 @@ static inline struct net_device *next_net_device(struct net_device *dev)
 	struct list_head *lh;
 	struct net *net;
 
-	net = dev->nd_net;
+	net = dev_net(dev);
 	lh = dev->dev_list.next;
 	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
 }
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 67c2563961f..d870a825376 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -5,6 +5,7 @@
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/mutex.h>
+#include <net/net_namespace.h>
 
 struct seq_operations;
 struct file;
@@ -64,7 +65,9 @@ extern struct list_head *seq_list_next(void *v, struct list_head *head,
 
 struct net;
 struct seq_net_private {
+#ifdef CONFIG_NET_NS
 	struct net *net;
+#endif
 };
 
 int seq_open_net(struct inode *, struct file *,
@@ -72,7 +75,11 @@ int seq_open_net(struct inode *, struct file *,
 int seq_release_net(struct inode *, struct file *);
 static inline struct net *seq_file_net(struct seq_file *seq)
 {
+#ifdef CONFIG_NET_NS
 	return ((struct seq_net_private *)seq->private)->net;
+#else
+	return &init_net;
+#endif
 }
 
 #endif
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index d99c1ba2ece..5525227c5e9 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -314,25 +314,25 @@ typedef __u64 __bitwise __addrpair;
 				   ((__force __u64)(__be32)(__saddr)));
 #endif /* __BIG_ENDIAN */
 #define INET_MATCH(__sk, __net, __hash, __cookie, __saddr, __daddr, __ports, __dif)\
-	(((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))	&&	\
+	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)	&&	\
 	 ((*((__addrpair *)&(inet_sk(__sk)->daddr))) == (__cookie))	&&	\
 	 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports))	&&	\
 	 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
 #define INET_TW_MATCH(__sk, __net, __hash, __cookie, __saddr, __daddr, __ports, __dif)\
-	(((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))	&&	\
+	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)	&&	\
 	 ((*((__addrpair *)&(inet_twsk(__sk)->tw_daddr))) == (__cookie)) &&	\
 	 ((*((__portpair *)&(inet_twsk(__sk)->tw_dport))) == (__ports)) &&	\
 	 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
 #else /* 32-bit arch */
 #define INET_ADDR_COOKIE(__name, __saddr, __daddr)
 #define INET_MATCH(__sk, __net, __hash, __cookie, __saddr, __daddr, __ports, __dif)	\
-	(((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))	&&	\
+	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)	&&	\
 	 (inet_sk(__sk)->daddr		== (__saddr))		&&	\
 	 (inet_sk(__sk)->rcv_saddr	== (__daddr))		&&	\
 	 ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports))	&&	\
 	 (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
 #define INET_TW_MATCH(__sk, __net, __hash,__cookie, __saddr, __daddr, __ports, __dif)	\
-	(((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))	&&	\
+	(((__sk)->sk_hash == (__hash)) && sock_net((__sk)) == (__net)	&&	\
 	 (inet_twsk(__sk)->tw_daddr	== (__saddr))		&&	\
 	 (inet_twsk(__sk)->tw_rcv_saddr	== (__daddr))		&&	\
 	 ((*((__portpair *)&(inet_twsk(__sk)->tw_dport))) == (__ports)) &&	\
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index 296547bfb0b..07fe0d1a4f0 100644
--- a/include/net/inet_timewait_sock.h
+++ b/include/net/inet_timewait_sock.h
@@ -207,4 +207,22 @@ extern void inet_twsk_schedule(struct inet_timewait_sock *tw,
 			       const int timeo, const int timewait_len);
 extern void inet_twsk_deschedule(struct inet_timewait_sock *tw,
 				 struct inet_timewait_death_row *twdr);
+
+static inline
+struct net *twsk_net(const struct inet_timewait_sock *twsk)
+{
+#ifdef CONFIG_NET_NS
+	return twsk->tw_net;
+#else
+	return &init_net;
+#endif
+}
+
+static inline
+void twsk_net_set(struct inet_timewait_sock *twsk, const struct net *net)
+{
+#ifdef CONFIG_NET_NS
+	twsk->tw_net = net;
+#endif
+}
 #endif	/* _INET_TIMEWAIT_SOCK_ */
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 06228187206..8bec0d69b27 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -38,7 +38,9 @@ struct neighbour;
 
 struct neigh_parms
 {
+#ifdef CONFIG_NET_NS
 	struct net *net;
+#endif
 	struct net_device *dev;
 	struct neigh_parms *next;
 	int	(*neigh_setup)(struct neighbour *);
@@ -131,7 +133,9 @@ struct neigh_ops
 struct pneigh_entry
 {
 	struct pneigh_entry	*next;
+#ifdef CONFIG_NET_NS
 	struct net		*net;
+#endif
 	struct net_device	*dev;
 	u8			flags;
 	u8			key[0];
@@ -213,6 +217,17 @@ extern struct neighbour 	*neigh_event_ns(struct neigh_table *tbl,
 
 extern struct neigh_parms	*neigh_parms_alloc(struct net_device *dev, struct neigh_table *tbl);
 extern void			neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms);
+
+static inline
+struct net			*neigh_parms_net(const struct neigh_parms *parms)
+{
+#ifdef CONFIG_NET_NS
+	return parms->net;
+#else
+	return &init_net;
+#endif
+}
+
 extern unsigned long		neigh_rand_reach_time(unsigned long base);
 
 extern void			pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
@@ -220,6 +235,16 @@ extern void			pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
 extern struct pneigh_entry	*pneigh_lookup(struct neigh_table *tbl, struct net *net, const void *key, struct net_device *dev, int creat);
 extern int			pneigh_delete(struct neigh_table *tbl, struct net *net, const void *key, struct net_device *dev);
 
+static inline
+struct net			*pneigh_net(const struct pneigh_entry *pneigh)
+{
+#ifdef CONFIG_NET_NS
+	return pneigh->net;
+#else
+	return &init_net;
+#endif
+}
+
 extern void neigh_app_ns(struct neighbour *n);
 extern void neigh_for_each(struct neigh_table *tbl, void (*cb)(struct neighbour *, void *), void *cookie);
 extern void __neigh_for_each_release(struct neigh_table *tbl, int (*cb)(struct neighbour *));
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 923f2b8b909..f8f3d1a5fc3 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -118,6 +118,12 @@ static inline void release_net(struct net *net)
 {
 	atomic_dec(&net->use_count);
 }
+
+static inline
+int net_eq(const struct net *net1, const struct net *net2)
+{
+	return net1 == net2;
+}
 #else
 static inline struct net *get_net(struct net *net)
 {
@@ -141,6 +147,12 @@ static inline struct net *maybe_get_net(struct net *net)
 {
 	return net;
 }
+
+static inline
+int net_eq(const struct net *net1, const struct net *net2)
+{
+	return 1;
+}
 #endif
 
 #define for_each_net(VAR)				\
diff --git a/include/net/route.h b/include/net/route.h
index 28dba925663..c6338802e8f 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -160,7 +160,7 @@ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
 					 .dport = dport } } };
 
 	int err;
-	struct net *net = sk->sk_net;
+	struct net *net = sock_net(sk);
 	if (!dst || !src) {
 		err = __ip_route_output_key(net, rp, &fl);
 		if (err)
@@ -188,7 +188,7 @@ static inline int ip_route_newports(struct rtable **rp, u8 protocol,
 		ip_rt_put(*rp);
 		*rp = NULL;
 		security_sk_classify_flow(sk, &fl);
-		return ip_route_output_flow(sk->sk_net, rp, &fl, sk, 0);
+		return ip_route_output_flow(sock_net(sk), rp, &fl, sk, 0);
 	}
 	return 0;
 }
diff --git a/include/net/sock.h b/include/net/sock.h
index b433b1ed203..7e0d4a0c4d1 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -126,7 +126,9 @@ struct sock_common {
 	atomic_t		skc_refcnt;
 	unsigned int		skc_hash;
 	struct proto		*skc_prot;
+#ifdef CONFIG_NET_NS
 	struct net	 	*skc_net;
+#endif
 };
 
 /**
@@ -1345,6 +1347,24 @@ static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_e
 }
 #endif
 
+static inline
+struct net *sock_net(const struct sock *sk)
+{
+#ifdef CONFIG_NET_NS
+	return sk->sk_net;
+#else
+	return &init_net;
+#endif
+}
+
+static inline
+void sock_net_set(struct sock *sk, const struct net *net)
+{
+#ifdef CONFIG_NET_NS
+	sk->sk_net = net;
+#endif
+}
+
 /*
  * Kernel sockets, f.e. rtnl or icmp_socket, are a part of a namespace.
  * They should not hold a referrence to a namespace in order to allow
@@ -1353,8 +1373,8 @@ static inline void sk_eat_skb(struct sock *sk, struct sk_buff *skb, int copied_e
  */
 static inline void sk_change_net(struct sock *sk, struct net *net)
 {
-	put_net(sk->sk_net);
-	sk->sk_net = net;
+	put_net(sock_net(sk));
+	sock_net_set(sk, net);
 }
 
 extern void sock_enable_timestamp(struct sock *sk);