Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1429 commits)
  net: Allow dependancies of FDDI & Tokenring to be modular.
  igb: Fix build warning when DCA is disabled.
  net: Fix warning fallout from recent NAPI interface changes.
  gro: Fix potential use after free
  sfc: If AN is enabled, always read speed/duplex from the AN advertising bits
  sfc: When disabling the NIC, close the device rather than unregistering it
  sfc: SFT9001: Add cable diagnostics
  sfc: Add support for multiple PHY self-tests
  sfc: Merge top-level functions for self-tests
  sfc: Clean up PHY mode management in loopback self-test
  sfc: Fix unreliable link detection in some loopback modes
  sfc: Generate unique names for per-NIC workqueues
  802.3ad: use standard ethhdr instead of ad_header
  802.3ad: generalize out mac address initializer
  802.3ad: initialize ports LACPDU from const initializer
  802.3ad: remove typedef around ad_system
  802.3ad: turn ports is_individual into a bool
  802.3ad: turn ports is_enabled into a bool
  802.3ad: make ntt bool
  ixgbe: Fix set_ringparam in ixgbe to use the same memory pools.
  ...

Fixed trivial IPv4/6 address printing conflicts in fs/cifs/connect.c due
to the conversion to %pI (in this networking merge) and the addition of
doing IPv6 addresses (from the earlier merge of CIFS).

62 files changed, 2136 insertions, 1286 deletions

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 1aa2dc9..743f554 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -94,6 +94,7 @@
 #include <linux/igmp.h>
 #include <linux/inetdevice.h>
 #include <linux/netdevice.h>
+#include <net/checksum.h>
 #include <net/ip.h>
 #include <net/protocol.h>
 #include <net/arp.h>
@@ -245,7 +246,7 @@ static inline int inet_netns_ok(struct net *net, int protocol)
 	int hash;
 	struct net_protocol *ipprot;
 
-	if (net == &init_net)
+	if (net_eq(net, &init_net))
 		return 1;
 
 	hash = protocol & (MAX_INET_PROTOS - 1);
@@ -272,10 +273,9 @@ static int inet_create(struct net *net, struct socket *sock, int protocol)
 	int try_loading_module = 0;
 	int err;
 
-	if (sock->type != SOCK_RAW &&
-	    sock->type != SOCK_DGRAM &&
-	    !inet_ehash_secret)
-		build_ehash_secret();
+	if (unlikely(!inet_ehash_secret))
+		if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
+			build_ehash_secret();
 
 	sock->state = SS_UNCONNECTED;
 
@@ -1070,11 +1070,8 @@ static int inet_sk_reselect_saddr(struct sock *sk)
 		return 0;
 
 	if (sysctl_ip_dynaddr > 1) {
-		printk(KERN_INFO "%s(): shifting inet->"
-				 "saddr from " NIPQUAD_FMT " to " NIPQUAD_FMT "\n",
-		       __func__,
-		       NIPQUAD(old_saddr),
-		       NIPQUAD(new_saddr));
+		printk(KERN_INFO "%s(): shifting inet->saddr from %pI4 to %pI4\n",
+		       __func__, &old_saddr, &new_saddr);
 	}
 
 	inet->saddr = inet->rcv_saddr = new_saddr;
@@ -1245,6 +1242,100 @@ out:
 	return segs;
 }
 
+static struct sk_buff **inet_gro_receive(struct sk_buff **head,
+					 struct sk_buff *skb)
+{
+	struct net_protocol *ops;
+	struct sk_buff **pp = NULL;
+	struct sk_buff *p;
+	struct iphdr *iph;
+	int flush = 1;
+	int proto;
+	int id;
+
+	if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
+		goto out;
+
+	iph = ip_hdr(skb);
+	proto = iph->protocol & (MAX_INET_PROTOS - 1);
+
+	rcu_read_lock();
+	ops = rcu_dereference(inet_protos[proto]);
+	if (!ops || !ops->gro_receive)
+		goto out_unlock;
+
+	if (iph->version != 4 || iph->ihl != 5)
+		goto out_unlock;
+
+	if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
+		goto out_unlock;
+
+	flush = ntohs(iph->tot_len) != skb->len ||
+		iph->frag_off != htons(IP_DF);
+	id = ntohs(iph->id);
+
+	for (p = *head; p; p = p->next) {
+		struct iphdr *iph2;
+
+		if (!NAPI_GRO_CB(p)->same_flow)
+			continue;
+
+		iph2 = ip_hdr(p);
+
+		if (iph->protocol != iph2->protocol ||
+		    iph->tos != iph2->tos ||
+		    memcmp(&iph->saddr, &iph2->saddr, 8)) {
+			NAPI_GRO_CB(p)->same_flow = 0;
+			continue;
+		}
+
+		/* All fields must match except length and checksum. */
+		NAPI_GRO_CB(p)->flush |=
+			memcmp(&iph->frag_off, &iph2->frag_off, 4) ||
+			(u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) != id;
+
+		NAPI_GRO_CB(p)->flush |= flush;
+	}
+
+	NAPI_GRO_CB(skb)->flush |= flush;
+	__skb_pull(skb, sizeof(*iph));
+	skb_reset_transport_header(skb);
+
+	pp = ops->gro_receive(head, skb);
+
+out_unlock:
+	rcu_read_unlock();
+
+out:
+	NAPI_GRO_CB(skb)->flush |= flush;
+
+	return pp;
+}
+
+static int inet_gro_complete(struct sk_buff *skb)
+{
+	struct net_protocol *ops;
+	struct iphdr *iph = ip_hdr(skb);
+	int proto = iph->protocol & (MAX_INET_PROTOS - 1);
+	int err = -ENOSYS;
+	__be16 newlen = htons(skb->len - skb_network_offset(skb));
+
+	csum_replace2(&iph->check, iph->tot_len, newlen);
+	iph->tot_len = newlen;
+
+	rcu_read_lock();
+	ops = rcu_dereference(inet_protos[proto]);
+	if (WARN_ON(!ops || !ops->gro_complete))
+		goto out_unlock;
+
+	err = ops->gro_complete(skb);
+
+out_unlock:
+	rcu_read_unlock();
+
+	return err;
+}
+
 int inet_ctl_sock_create(struct sock **sk, unsigned short family,
 			 unsigned short type, unsigned char protocol,
 			 struct net *net)
@@ -1311,6 +1402,7 @@ EXPORT_SYMBOL_GPL(snmp_mib_free);
 #ifdef CONFIG_IP_MULTICAST
 static struct net_protocol igmp_protocol = {
 	.handler =	igmp_rcv,
+	.netns_ok =	1,
 };
 #endif
 
@@ -1319,6 +1411,8 @@ static struct net_protocol tcp_protocol = {
 	.err_handler =	tcp_v4_err,
 	.gso_send_check = tcp_v4_gso_send_check,
 	.gso_segment =	tcp_tso_segment,
+	.gro_receive =	tcp4_gro_receive,
+	.gro_complete =	tcp4_gro_complete,
 	.no_policy =	1,
 	.netns_ok =	1,
 };
@@ -1411,6 +1505,8 @@ static struct packet_type ip_packet_type = {
 	.func = ip_rcv,
 	.gso_send_check = inet_gso_send_check,
 	.gso_segment = inet_gso_segment,
+	.gro_receive = inet_gro_receive,
+	.gro_complete = inet_gro_complete,
 };
 
 static int __init inet_init(void)
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 8219b7e..e878e49 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -201,15 +201,16 @@ out:
 
 static void ah4_err(struct sk_buff *skb, u32 info)
 {
-	struct iphdr *iph = (struct iphdr*)skb->data;
-	struct ip_auth_hdr *ah = (struct ip_auth_hdr*)(skb->data+(iph->ihl<<2));
+	struct net *net = dev_net(skb->dev);
+	struct iphdr *iph = (struct iphdr *)skb->data;
+	struct ip_auth_hdr *ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
 	struct xfrm_state *x;
 
 	if (icmp_hdr(skb)->type != ICMP_DEST_UNREACH ||
 	    icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 		return;
 
-	x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET);
+	x = xfrm_state_lookup(net, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET);
 	if (!x)
 		return;
 	printk(KERN_DEBUG "pmtu discovery on SA AH/%08x/%08x\n",
@@ -293,9 +294,7 @@ static void ah_destroy(struct xfrm_state *x)
 		return;
 
 	kfree(ahp->work_icv);
-	ahp->work_icv = NULL;
 	crypto_free_hash(ahp->tfm);
-	ahp->tfm = NULL;
 	kfree(ahp);
 }
 
@@ -316,6 +315,7 @@ static struct net_protocol ah4_protocol = {
 	.handler	=	xfrm4_rcv,
 	.err_handler	=	ah4_err,
 	.no_policy	=	1,
+	.netns_ok	=	1,
 };
 
 static int __init ah4_init(void)
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 1a9dd66..29a74c0 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -506,7 +506,7 @@ int arp_bind_neighbour(struct dst_entry *dst)
 	if (dev == NULL)
 		return -EINVAL;
 	if (n == NULL) {
-		__be32 nexthop = ((struct rtable*)dst)->rt_gateway;
+		__be32 nexthop = ((struct rtable *)dst)->rt_gateway;
 		if (dev->flags&(IFF_LOOPBACK|IFF_POINTOPOINT))
 			nexthop = 0;
 		n = __neigh_lookup_errno(
@@ -640,14 +640,14 @@ struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
 	arp_ptr=(unsigned char *)(arp+1);
 
 	memcpy(arp_ptr, src_hw, dev->addr_len);
-	arp_ptr+=dev->addr_len;
-	memcpy(arp_ptr, &src_ip,4);
-	arp_ptr+=4;
+	arp_ptr += dev->addr_len;
+	memcpy(arp_ptr, &src_ip, 4);
+	arp_ptr += 4;
 	if (target_hw != NULL)
 		memcpy(arp_ptr, target_hw, dev->addr_len);
 	else
 		memset(arp_ptr, 0, dev->addr_len);
-	arp_ptr+=dev->addr_len;
+	arp_ptr += dev->addr_len;
 	memcpy(arp_ptr, &dest_ip, 4);
 
 	return skb;
@@ -818,18 +818,18 @@ static int arp_process(struct sk_buff *skb)
 		addr_type = rt->rt_type;
 
 		if (addr_type == RTN_LOCAL) {
-			n = neigh_event_ns(&arp_tbl, sha, &sip, dev);
-			if (n) {
-				int dont_send = 0;
-
-				if (!dont_send)
-					dont_send |= arp_ignore(in_dev,sip,tip);
-				if (!dont_send && IN_DEV_ARPFILTER(in_dev))
-					dont_send |= arp_filter(sip,tip,dev);
-				if (!dont_send)
-					arp_send(ARPOP_REPLY,ETH_P_ARP,sip,dev,tip,sha,dev->dev_addr,sha);
+			int dont_send = 0;
 
-				neigh_release(n);
+			if (!dont_send)
+				dont_send |= arp_ignore(in_dev,sip,tip);
+			if (!dont_send && IN_DEV_ARPFILTER(in_dev))
+				dont_send |= arp_filter(sip,tip,dev);
+			if (!dont_send) {
+				n = neigh_event_ns(&arp_tbl, sha, &sip, dev);
+				if (n) {
+					arp_send(ARPOP_REPLY,ETH_P_ARP,sip,dev,tip,sha,dev->dev_addr,sha);
+					neigh_release(n);
+				}
 			}
 			goto out;
 		} else if (IN_DEV_FORWARD(in_dev)) {
@@ -1308,7 +1308,7 @@ static void arp_format_neigh_entry(struct seq_file *seq,
 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
 	}
 #endif
-	sprintf(tbuf, NIPQUAD_FMT, NIPQUAD(*(u32*)n->primary_key));
+	sprintf(tbuf, "%pI4", n->primary_key);
 	seq_printf(seq, "%-16s 0x%-10x0x%-10x%s     *        %s\n",
 		   tbuf, hatype, arp_state_to_flags(n), hbuffer, dev->name);
 	read_unlock(&n->lock);
@@ -1321,7 +1321,7 @@ static void arp_format_pneigh_entry(struct seq_file *seq,
 	int hatype = dev ? dev->type : 0;
 	char tbuf[16];
 
-	sprintf(tbuf, NIPQUAD_FMT, NIPQUAD(*(u32*)n->key));
+	sprintf(tbuf, "%pI4", n->key);
 	seq_printf(seq, "%-16s 0x%-10x0x%-10x%s     *        %s\n",
 		   tbuf, hatype, ATF_PUBL | ATF_PERM, "00:00:00:00:00:00",
 		   dev ? dev->name : "*");
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index 2e78f6b..e527990 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -490,7 +490,6 @@ int cipso_v4_doi_add(struct cipso_v4_doi *doi_def)
 	}
 
 	atomic_set(&doi_def->refcount, 1);
-	INIT_RCU_HEAD(&doi_def->rcu);
 
 	spin_lock(&cipso_v4_doi_list_lock);
 	if (cipso_v4_doi_search(doi_def->doi) != NULL)
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 56fce3a..309997e 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -112,13 +112,7 @@ static inline void devinet_sysctl_unregister(struct in_device *idev)
 
 static struct in_ifaddr *inet_alloc_ifa(void)
 {
-	struct in_ifaddr *ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
-
-	if (ifa) {
-		INIT_RCU_HEAD(&ifa->rcu_head);
-	}
-
-	return ifa;
+	return kzalloc(sizeof(struct in_ifaddr), GFP_KERNEL);
 }
 
 static void inet_rcu_free_ifa(struct rcu_head *head)
@@ -161,7 +155,6 @@ static struct in_device *inetdev_init(struct net_device *dev)
 	in_dev = kzalloc(sizeof(*in_dev), GFP_KERNEL);
 	if (!in_dev)
 		goto out;
-	INIT_RCU_HEAD(&in_dev->rcu_head);
 	memcpy(&in_dev->cnf, dev_net(dev)->ipv4.devconf_dflt,
 			sizeof(in_dev->cnf));
 	in_dev->cnf.sysctl = NULL;
@@ -1108,7 +1101,7 @@ out:
 }
 
 static struct notifier_block ip_netdev_notifier = {
-	.notifier_call =inetdev_event,
+	.notifier_call = inetdev_event,
 };
 
 static inline size_t inet_nlmsg_size(void)
@@ -1195,7 +1188,7 @@ done:
 	return skb->len;
 }
 
-static void rtmsg_ifa(int event, struct in_ifaddr* ifa, struct nlmsghdr *nlh,
+static void rtmsg_ifa(int event, struct in_ifaddr *ifa, struct nlmsghdr *nlh,
 		      u32 pid)
 {
 	struct sk_buff *skb;
@@ -1262,7 +1255,7 @@ static void inet_forward_change(struct net *net)
 }
 
 static int devinet_conf_proc(ctl_table *ctl, int write,
-			     struct file* filp, void __user *buffer,
+			     struct file *filp, void __user *buffer,
 			     size_t *lenp, loff_t *ppos)
 {
 	int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
@@ -1334,7 +1327,7 @@ static int devinet_conf_sysctl(ctl_table *table,
 }
 
 static int devinet_sysctl_forward(ctl_table *ctl, int write,
-				  struct file* filp, void __user *buffer,
+				  struct file *filp, void __user *buffer,
 				  size_t *lenp, loff_t *ppos)
 {
 	int *valp = ctl->data;
@@ -1363,7 +1356,7 @@ static int devinet_sysctl_forward(ctl_table *ctl, int write,
 }
 
 int ipv4_doint_and_flush(ctl_table *ctl, int write,
-			 struct file* filp, void __user *buffer,
+			 struct file *filp, void __user *buffer,
 			 size_t *lenp, loff_t *ppos)
 {
 	int *valp = ctl->data;
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 21515d4..18bb383 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -413,15 +413,16 @@ static u32 esp4_get_mtu(struct xfrm_state *x, int mtu)
 
 static void esp4_err(struct sk_buff *skb, u32 info)
 {
-	struct iphdr *iph = (struct iphdr*)skb->data;
-	struct ip_esp_hdr *esph = (struct ip_esp_hdr*)(skb->data+(iph->ihl<<2));
+	struct net *net = dev_net(skb->dev);
+	struct iphdr *iph = (struct iphdr *)skb->data;
+	struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
 	struct xfrm_state *x;
 
 	if (icmp_hdr(skb)->type != ICMP_DEST_UNREACH ||
 	    icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 		return;
 
-	x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET);
+	x = xfrm_state_lookup(net, (xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET);
 	if (!x)
 		return;
 	NETDEBUG(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%08x\n",
@@ -618,6 +619,7 @@ static struct net_protocol esp4_protocol = {
 	.handler	=	xfrm4_rcv,
 	.err_handler	=	esp4_err,
 	.no_policy	=	1,
+	.netns_ok	=	1,
 };
 
 static int __init esp4_init(void)
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 65c1503..741e4fa 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -578,7 +578,7 @@ errout:
 	return err;
 }
 
-static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
 	struct net *net = sock_net(skb->sk);
 	struct fib_config cfg;
@@ -600,7 +600,7 @@ errout:
 	return err;
 }
 
-static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
 	struct net *net = sock_net(skb->sk);
 	struct fib_config cfg;
@@ -903,7 +903,7 @@ static void fib_disable_ip(struct net_device *dev, int force)
 
 static int fib_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
 {
-	struct in_ifaddr *ifa = (struct in_ifaddr*)ptr;
+	struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
 	struct net_device *dev = ifa->ifa_dev->dev;
 
 	switch (event) {
@@ -964,11 +964,11 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo
 }
 
 static struct notifier_block fib_inetaddr_notifier = {
-	.notifier_call =fib_inetaddr_event,
+	.notifier_call = fib_inetaddr_event,
 };
 
 static struct notifier_block fib_netdev_notifier = {
-	.notifier_call =fib_netdev_event,
+	.notifier_call = fib_netdev_event,
 };
 
 static int __net_init ip_fib_net_init(struct net *net)
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index c8cac6c..ded8c44 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -247,7 +247,7 @@ fn_hash_lookup(struct fib_table *tb, const struct flowi *flp, struct fib_result
 {
 	int err;
 	struct fn_zone *fz;
-	struct fn_hash *t = (struct fn_hash*)tb->tb_data;
+	struct fn_hash *t = (struct fn_hash *)tb->tb_data;
 
 	read_lock(&fib_hash_lock);
 	for (fz = t->fn_zone_list; fz; fz = fz->fz_next) {
@@ -283,7 +283,7 @@ fn_hash_select_default(struct fib_table *tb, const struct flowi *flp, struct fib
 	struct fib_node *f;
 	struct fib_info *fi = NULL;
 	struct fib_info *last_resort;
-	struct fn_hash *t = (struct fn_hash*)tb->tb_data;
+	struct fn_hash *t = (struct fn_hash *)tb->tb_data;
 	struct fn_zone *fz = t->fn_zones[0];
 
 	if (fz == NULL)
@@ -548,7 +548,7 @@ out:
 
 static int fn_hash_delete(struct fib_table *tb, struct fib_config *cfg)
 {
-	struct fn_hash *table = (struct fn_hash*)tb->tb_data;
+	struct fn_hash *table = (struct fn_hash *)tb->tb_data;
 	struct fib_node *f;
 	struct fib_alias *fa, *fa_to_delete;
 	struct fn_zone *fz;
@@ -748,7 +748,7 @@ static int fn_hash_dump(struct fib_table *tb, struct sk_buff *skb, struct netlin
 {
 	int m, s_m;
 	struct fn_zone *fz;
-	struct fn_hash *table = (struct fn_hash*)tb->tb_data;
+	struct fn_hash *table = (struct fn_hash *)tb->tb_data;
 
 	s_m = cb->args[2];
 	read_lock(&fib_hash_lock);
@@ -845,10 +845,10 @@ static struct fib_alias *fib_get_first(struct seq_file *seq)
 			struct hlist_node *node;
 			struct fib_node *fn;
 
-			hlist_for_each_entry(fn,node,iter->hash_head,fn_hash) {
+			hlist_for_each_entry(fn, node, iter->hash_head, fn_hash) {
 				struct fib_alias *fa;
 
-				list_for_each_entry(fa,&fn->fn_alias,fa_list) {
+				list_for_each_entry(fa, &fn->fn_alias, fa_list) {
 					iter->fn = fn;
 					iter->fa = fa;
 					goto out;
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index ded2ae3..4817dea 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -63,16 +63,16 @@ static DEFINE_SPINLOCK(fib_multipath_lock);
 for (nhsel=0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++)
 
 #define change_nexthops(fi) { int nhsel; struct fib_nh * nh; \
-for (nhsel=0, nh = (struct fib_nh*)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nh++, nhsel++)
+for (nhsel=0, nh = (struct fib_nh *)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nh++, nhsel++)
 
 #else /* CONFIG_IP_ROUTE_MULTIPATH */
 
 /* Hope, that gcc will optimize it to get rid of dummy loop */
 
-#define for_nexthops(fi) { int nhsel=0; const struct fib_nh * nh = (fi)->fib_nh; \
+#define for_nexthops(fi) { int nhsel = 0; const struct fib_nh * nh = (fi)->fib_nh; \
 for (nhsel=0; nhsel < 1; nhsel++)
 
-#define change_nexthops(fi) { int nhsel=0; struct fib_nh * nh = (struct fib_nh*)((fi)->fib_nh); \
+#define change_nexthops(fi) { int nhsel = 0; struct fib_nh * nh = (struct fib_nh *)((fi)->fib_nh); \
 for (nhsel=0; nhsel < 1; nhsel++)
 
 #endif /* CONFIG_IP_ROUTE_MULTIPATH */
@@ -358,7 +358,7 @@ int fib_detect_death(struct fib_info *fi, int order,
 		state = n->nud_state;
 		neigh_release(n);
 	}
-	if (state==NUD_REACHABLE)
+	if (state == NUD_REACHABLE)
 		return 0;
 	if ((state&NUD_VALID) && order != dflt)
 		return 0;
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 5cb7278..ec0ae49 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -2399,8 +2399,8 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
 		__be32 prf = htonl(mask_pfx(tn->key, tn->pos));
 
 		seq_indent(seq, iter->depth-1);
-		seq_printf(seq, "  +-- " NIPQUAD_FMT "/%d %d %d %d\n",
-			   NIPQUAD(prf), tn->pos, tn->bits, tn->full_children,
+		seq_printf(seq, "  +-- %pI4/%d %d %d %d\n",
+			   &prf, tn->pos, tn->bits, tn->full_children,
 			   tn->empty_children);
 
 	} else {
@@ -2410,7 +2410,7 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
 		__be32 val = htonl(l->key);
 
 		seq_indent(seq, iter->depth);
-		seq_printf(seq, "  |-- " NIPQUAD_FMT "\n", NIPQUAD(val));
+		seq_printf(seq, "  |-- %pI4\n", &val);
 
 		hlist_for_each_entry_rcu(li, node, &l->list, hlist) {
 			struct fib_alias *fa;
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 72b2de7..705b33b 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -321,12 +321,12 @@ static int icmp_glue_bits(void *from, char *to, int offset, int len, int odd,
 }
 
 static void icmp_push_reply(struct icmp_bxm *icmp_param,
-			    struct ipcm_cookie *ipc, struct rtable *rt)
+			    struct ipcm_cookie *ipc, struct rtable **rt)
 {
 	struct sock *sk;
 	struct sk_buff *skb;
 
-	sk = icmp_sk(dev_net(rt->u.dst.dev));
+	sk = icmp_sk(dev_net((*rt)->u.dst.dev));
 	if (ip_append_data(sk, icmp_glue_bits, icmp_param,
 			   icmp_param->data_len+icmp_param->head_len,
 			   icmp_param->head_len,
@@ -392,7 +392,7 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
 	}
 	if (icmpv4_xrlim_allow(net, rt, icmp_param->data.icmph.type,
 			       icmp_param->data.icmph.code))
-		icmp_push_reply(icmp_param, &ipc, rt);
+		icmp_push_reply(icmp_param, &ipc, &rt);
 	ip_rt_put(rt);
 out_unlock:
 	icmp_xmit_unlock(sk);
@@ -562,7 +562,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
 		/* No need to clone since we're just using its address. */
 		rt2 = rt;
 
-		err = xfrm_lookup((struct dst_entry **)&rt, &fl, NULL, 0);
+		err = xfrm_lookup(net, (struct dst_entry **)&rt, &fl, NULL, 0);
 		switch (err) {
 		case 0:
 			if (rt != rt2)
@@ -601,7 +601,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
 		if (err)
 			goto relookup_failed;
 
-		err = xfrm_lookup((struct dst_entry **)&rt2, &fl, NULL,
+		err = xfrm_lookup(net, (struct dst_entry **)&rt2, &fl, NULL,
 				  XFRM_LOOKUP_ICMP);
 		switch (err) {
 		case 0:
@@ -635,7 +635,7 @@ route_done:
 		icmp_param.data_len = room;
 	icmp_param.head_len = sizeof(struct icmphdr);
 
-	icmp_push_reply(&icmp_param, &ipc, rt);
+	icmp_push_reply(&icmp_param, &ipc, &rt);
 ende:
 	ip_rt_put(rt);
 out_unlock:
@@ -683,10 +683,8 @@ static void icmp_unreach(struct sk_buff *skb)
 			break;
 		case ICMP_FRAG_NEEDED:
 			if (ipv4_config.no_pmtu_disc) {
-				LIMIT_NETDEBUG(KERN_INFO "ICMP: " NIPQUAD_FMT ": "
-							 "fragmentation needed "
-							 "and DF set.\n",
-					       NIPQUAD(iph->daddr));
+				LIMIT_NETDEBUG(KERN_INFO "ICMP: %pI4: fragmentation needed and DF set.\n",
+					       &iph->daddr);
 			} else {
 				info = ip_rt_frag_needed(net, iph,
 							 ntohs(icmph->un.frag.mtu),
@@ -696,9 +694,8 @@ static void icmp_unreach(struct sk_buff *skb)
 			}
 			break;
 		case ICMP_SR_FAILED:
-			LIMIT_NETDEBUG(KERN_INFO "ICMP: " NIPQUAD_FMT ": Source "
-						 "Route Failed.\n",
-				       NIPQUAD(iph->daddr));
+			LIMIT_NETDEBUG(KERN_INFO "ICMP: %pI4: Source Route Failed.\n",
+				       &iph->daddr);
 			break;
 		default:
 			break;
@@ -729,12 +726,12 @@ static void icmp_unreach(struct sk_buff *skb)
 	if (!net->ipv4.sysctl_icmp_ignore_bogus_error_responses &&
 	    inet_addr_type(net, iph->daddr) == RTN_BROADCAST) {
 		if (net_ratelimit())
-			printk(KERN_WARNING NIPQUAD_FMT " sent an invalid ICMP "
+			printk(KERN_WARNING "%pI4 sent an invalid ICMP "
 					    "type %u, code %u "
-					    "error to a broadcast: " NIPQUAD_FMT " on %s\n",
-			       NIPQUAD(ip_hdr(skb)->saddr),
+					    "error to a broadcast: %pI4 on %s\n",
+			       &ip_hdr(skb)->saddr,
 			       icmph->type, icmph->code,
-			       NIPQUAD(iph->daddr),
+			       &iph->daddr,
 			       skb->dev->name);
 		goto out;
 	}
@@ -952,9 +949,8 @@ static void icmp_address_reply(struct sk_buff *skb)
 				break;
 		}
 		if (!ifa && net_ratelimit()) {
-			printk(KERN_INFO "Wrong address mask " NIPQUAD_FMT " from "
-					 "%s/" NIPQUAD_FMT "\n",
-			       NIPQUAD(*mp), dev->name, NIPQUAD(rt->rt_src));
+			printk(KERN_INFO "Wrong address mask %pI4 from %s/%pI4\n",
+			       mp, dev->name, &rt->rt_src);
 		}
 	}
 	rcu_read_unlock();
@@ -976,9 +972,10 @@ int icmp_rcv(struct sk_buff *skb)
 	struct net *net = dev_net(rt->u.dst.dev);
 
 	if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+		struct sec_path *sp = skb_sec_path(skb);
 		int nh;
 
-		if (!(skb->sp && skb->sp->xvec[skb->sp->len - 1]->props.flags &
+		if (!(sp && sp->xvec[sp->len - 1]->props.flags &
 				 XFRM_STATE_ICMP))
 			goto drop;
 
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index a0d8645..9eb6219 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -167,7 +167,7 @@ static __inline__ void igmp_stop_timer(struct ip_mc_list *im)
 	spin_lock_bh(&im->lock);
 	if (del_timer(&im->timer))
 		atomic_dec(&im->refcnt);
-	im->tm_running=0;
+	im->tm_running = 0;
 	im->reporter = 0;
 	im->unsolicit_count = 0;
 	spin_unlock_bh(&im->lock);
@@ -176,9 +176,9 @@ static __inline__ void igmp_stop_timer(struct ip_mc_list *im)
 /* It must be called with locked im->lock */
 static void igmp_start_timer(struct ip_mc_list *im, int max_delay)
 {
-	int tv=net_random() % max_delay;
+	int tv = net_random() % max_delay;
 
-	im->tm_running=1;
+	im->tm_running = 1;
 	if (!mod_timer(&im->timer, jiffies+tv+2))
 		atomic_inc(&im->refcnt);
 }
@@ -207,7 +207,7 @@ static void igmp_mod_timer(struct ip_mc_list *im, int max_delay)
 	if (del_timer(&im->timer)) {
 		if ((long)(im->timer.expires-jiffies) < max_delay) {
 			add_timer(&im->timer);
-			im->tm_running=1;
+			im->tm_running = 1;
 			spin_unlock_bh(&im->lock);
 			return;
 		}
@@ -358,7 +358,7 @@ static int igmpv3_sendpack(struct sk_buff *skb)
 
 static int grec_size(struct ip_mc_list *pmc, int type, int gdel, int sdel)
 {
-	return sizeof(struct igmpv3_grec) + 4*igmp_scount(pmc,type,gdel,sdel);
+	return sizeof(struct igmpv3_grec) + 4*igmp_scount(pmc, type, gdel, sdel);
 }
 
 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ip_mc_list *pmc,
@@ -653,7 +653,7 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
 		return -1;
 	}
 
-	skb=alloc_skb(IGMP_SIZE+LL_ALLOCATED_SPACE(dev), GFP_ATOMIC);
+	skb = alloc_skb(IGMP_SIZE+LL_ALLOCATED_SPACE(dev), GFP_ATOMIC);
 	if (skb == NULL) {
 		ip_rt_put(rt);
 		return -1;
@@ -682,11 +682,11 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
 	((u8*)&iph[1])[3] = 0;
 
 	ih = (struct igmphdr *)skb_put(skb, sizeof(struct igmphdr));
-	ih->type=type;
-	ih->code=0;
-	ih->csum=0;
-	ih->group=group;
-	ih->csum=ip_compute_csum((void *)ih, sizeof(struct igmphdr));
+	ih->type = type;
+	ih->code = 0;
+	ih->csum = 0;
+	ih->group = group;
+	ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr));
 
 	return ip_local_out(skb);
 }
@@ -728,7 +728,7 @@ static void igmp_timer_expire(unsigned long data)
 	struct in_device *in_dev = im->interface;
 
 	spin_lock(&im->lock);
-	im->tm_running=0;
+	im->tm_running = 0;
 
 	if (im->unsolicit_count) {
 		im->unsolicit_count--;
@@ -997,7 +997,7 @@ static void ip_mc_filter_add(struct in_device *in_dev, __be32 addr)
 	   --ANK
 	   */
 	if (arp_mc_map(addr, buf, dev, 0) == 0)
-		dev_mc_add(dev,buf,dev->addr_len,0);
+		dev_mc_add(dev, buf, dev->addr_len, 0);
 }
 
 /*
@@ -1010,7 +1010,7 @@ static void ip_mc_filter_del(struct in_device *in_dev, __be32 addr)
 	struct net_device *dev = in_dev->dev;
 
 	if (arp_mc_map(addr, buf, dev, 0) == 0)
-		dev_mc_delete(dev,buf,dev->addr_len,0);
+		dev_mc_delete(dev, buf, dev->addr_len, 0);
 }
 
 #ifdef CONFIG_IP_MULTICAST
@@ -1210,10 +1210,10 @@ void ip_mc_inc_group(struct in_device *in_dev, __be32 addr)
 	if (!im)
 		goto out;
 
-	im->users=1;
-	im->interface=in_dev;
+	im->users = 1;
+	im->interface = in_dev;
 	in_dev_hold(in_dev);
-	im->multiaddr=addr;
+	im->multiaddr = addr;
 	/* initial mode is (EX, empty) */
 	im->sfmode = MCAST_EXCLUDE;
 	im->sfcount[MCAST_INCLUDE] = 0;
@@ -1224,7 +1224,7 @@ void ip_mc_inc_group(struct in_device *in_dev, __be32 addr)
 	atomic_set(&im->refcnt, 1);
 	spin_lock_init(&im->lock);
 #ifdef CONFIG_IP_MULTICAST
-	im->tm_running=0;
+	im->tm_running = 0;
 	setup_timer(&im->timer, &igmp_timer_expire, (unsigned long)im);
 	im->unsolicit_count = IGMP_Unsolicited_Report_Count;
 	im->reporter = 0;
@@ -1232,8 +1232,8 @@ void ip_mc_inc_group(struct in_device *in_dev, __be32 addr)
 #endif
 	im->loaded = 0;
 	write_lock_bh(&in_dev->mc_list_lock);
-	im->next=in_dev->mc_list;
-	in_dev->mc_list=im;
+	im->next = in_dev->mc_list;
+	in_dev->mc_list = im;
 	in_dev->mc_count++;
 	write_unlock_bh(&in_dev->mc_list_lock);
 #ifdef CONFIG_IP_MULTICAST
@@ -1279,7 +1279,7 @@ void ip_mc_dec_group(struct in_device *in_dev, __be32 addr)
 	ASSERT_RTNL();
 
 	for (ip=&in_dev->mc_list; (i=*ip)!=NULL; ip=&i->next) {
-		if (i->multiaddr==addr) {
+		if (i->multiaddr == addr) {
 			if (--i->users == 0) {
 				write_lock_bh(&in_dev->mc_list_lock);
 				*ip = i->next;
@@ -1738,7 +1738,7 @@ int ip_mc_join_group(struct sock *sk , struct ip_mreqn *imr)
 {
 	int err;
 	__be32 addr = imr->imr_multiaddr.s_addr;
-	struct ip_mc_socklist *iml=NULL, *i;
+	struct ip_mc_socklist *iml = NULL, *i;
 	struct in_device *in_dev;
 	struct inet_sock *inet = inet_sk(sk);
 	struct net *net = sock_net(sk);
@@ -1769,7 +1769,7 @@ int ip_mc_join_group(struct sock *sk , struct ip_mreqn *imr)
 	err = -ENOBUFS;
 	if (count >= sysctl_igmp_max_memberships)
 		goto done;
-	iml = sock_kmalloc(sk,sizeof(*iml),GFP_KERNEL);
+	iml = sock_kmalloc(sk, sizeof(*iml), GFP_KERNEL);
 	if (iml == NULL)
 		goto done;
 
@@ -2275,6 +2275,7 @@ int ip_check_mc(struct in_device *in_dev, __be32 mc_addr, __be32 src_addr, u16 p
 
 #if defined(CONFIG_PROC_FS)
 struct igmp_mc_iter_state {
+	struct seq_net_private p;
 	struct net_device *dev;
 	struct in_device *in_dev;
 };
@@ -2283,11 +2284,12 @@ struct igmp_mc_iter_state {
 
 static inline struct ip_mc_list *igmp_mc_get_first(struct seq_file *seq)
 {
+	struct net *net = seq_file_net(seq);
 	struct ip_mc_list *im = NULL;
 	struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq);
 
 	state->in_dev = NULL;
-	for_each_netdev(&init_net, state->dev) {
+	for_each_netdev(net, state->dev) {
 		struct in_device *in_dev;
 		in_dev = in_dev_get(state->dev);
 		if (!in_dev)
@@ -2408,7 +2410,7 @@ static const struct seq_operations igmp_mc_seq_ops = {
 
 static int igmp_mc_seq_open(struct inode *inode, struct file *file)
 {
-	return seq_open_private(file, &igmp_mc_seq_ops,
+	return seq_open_net(inode, file, &igmp_mc_seq_ops,
 			sizeof(struct igmp_mc_iter_state));
 }
 
@@ -2417,10 +2419,11 @@ static const struct file_operations igmp_mc_seq_fops = {
 	.open		=	igmp_mc_seq_open,
 	.read		=	seq_read,
 	.llseek		=	seq_lseek,
-	.release	=	seq_release_private,
+	.release	=	seq_release_net,
 };
 
 struct igmp_mcf_iter_state {
+	struct seq_net_private p;
 	struct net_device *dev;
 	struct in_device *idev;
 	struct ip_mc_list *im;
@@ -2430,13 +2433,14 @@ struct igmp_mcf_iter_state {
 
 static inline struct ip_sf_list *igmp_mcf_get_first(struct seq_file *seq)
 {
+	struct net *net = seq_file_net(seq);
 	struct ip_sf_list *psf = NULL;
 	struct ip_mc_list *im = NULL;
 	struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq);
 
 	state->idev = NULL;
 	state->im = NULL;
-	for_each_netdev(&init_net, state->dev) {
+	for_each_netdev(net, state->dev) {
 		struct in_device *idev;
 		idev = in_dev_get(state->dev);
 		if (unlikely(idev == NULL))
@@ -2567,7 +2571,7 @@ static const struct seq_operations igmp_mcf_seq_ops = {
 
 static int igmp_mcf_seq_open(struct inode *inode, struct file *file)
 {
-	return seq_open_private(file, &igmp_mcf_seq_ops,
+	return seq_open_net(inode, file, &igmp_mcf_seq_ops,
 			sizeof(struct igmp_mcf_iter_state));
 }
 
@@ -2576,14 +2580,41 @@ static const struct file_operations igmp_mcf_seq_fops = {
 	.open		=	igmp_mcf_seq_open,
 	.read		=	seq_read,
 	.llseek		=	seq_lseek,
-	.release	=	seq_release_private,
+	.release	=	seq_release_net,
 };
 
-int __init igmp_mc_proc_init(void)
+static int igmp_net_init(struct net *net)
 {
-	proc_net_fops_create(&init_net, "igmp", S_IRUGO, &igmp_mc_seq_fops);
-	proc_net_fops_create(&init_net, "mcfilter", S_IRUGO, &igmp_mcf_seq_fops);
+	struct proc_dir_entry *pde;
+
+	pde = proc_net_fops_create(net, "igmp", S_IRUGO, &igmp_mc_seq_fops);
+	if (!pde)
+		goto out_igmp;
+	pde = proc_net_fops_create(net, "mcfilter", S_IRUGO, &igmp_mcf_seq_fops);
+	if (!pde)
+		goto out_mcfilter;
 	return 0;
+
+out_mcfilter:
+	proc_net_remove(net, "igmp");
+out_igmp:
+	return -ENOMEM;
+}
+
+static void igmp_net_exit(struct net *net)
+{
+	proc_net_remove(net, "mcfilter");
+	proc_net_remove(net, "igmp");
+}
+
+static struct pernet_operations igmp_net_ops = {
+	.init = igmp_net_init,
+	.exit = igmp_net_exit,
+};
+
+int __init igmp_mc_proc_init(void)
+{
+	return register_pernet_subsys(&igmp_net_ops);
 }
 #endif
 
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index bd1278a..c7cda1c 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -109,7 +109,7 @@ int inet_csk_get_port(struct sock *sk, unsigned short snum)
 					hashinfo->bhash_size)];
 			spin_lock(&head->lock);
 			inet_bind_bucket_for_each(tb, node, &head->chain)
-				if (tb->ib_net == net && tb->port == rover)
+				if (ib_net(tb) == net && tb->port == rover)
 					goto next;
 			break;
 		next:
@@ -137,7 +137,7 @@ int inet_csk_get_port(struct sock *sk, unsigned short snum)
 				hashinfo->bhash_size)];
 		spin_lock(&head->lock);
 		inet_bind_bucket_for_each(tb, node, &head->chain)
-			if (tb->ib_net == net && tb->port == snum)
+			if (ib_net(tb) == net && tb->port == snum)
 				goto tb_found;
 	}
 	tb = NULL;
@@ -323,7 +323,7 @@ void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long len)
 
 EXPORT_SYMBOL(inet_csk_reset_keepalive_timer);
 
-struct dst_entry* inet_csk_route_req(struct sock *sk,
+struct dst_entry *inet_csk_route_req(struct sock *sk,
 				     const struct request_sock *req)
 {
 	struct rtable *rt;
@@ -344,16 +344,17 @@ struct dst_entry* inet_csk_route_req(struct sock *sk,
 	struct net *net = sock_net(sk);
 
 	security_req_classify_flow(req, &fl);
-	if (ip_route_output_flow(net, &rt, &fl, sk, 0)) {
-		IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
-		return NULL;
-	}
-	if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway) {
-		ip_rt_put(rt);
-		IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
-		return NULL;
-	}
+	if (ip_route_output_flow(net, &rt, &fl, sk, 0))
+		goto no_route;
+	if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
+		goto route_err;
 	return &rt->u.dst;
+
+route_err:
+	ip_rt_put(rt);
+no_route:
+	IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
+	return NULL;
 }
 
 EXPORT_SYMBOL_GPL(inet_csk_route_req);
@@ -561,7 +562,7 @@ void inet_csk_destroy_sock(struct sock *sk)
 
 	sk_refcnt_debug_release(sk);
 
-	atomic_dec(sk->sk_prot->orphan_count);
+	percpu_counter_dec(sk->sk_prot->orphan_count);
 	sock_put(sk);
 }
 
@@ -632,6 +633,8 @@ void inet_csk_listen_stop(struct sock *sk)
 
 		acc_req = req->dl_next;
 
+		percpu_counter_inc(sk->sk_prot->orphan_count);
+
 		local_bh_disable();
 		bh_lock_sock(child);
 		WARN_ON(sock_owned_by_user(child));
@@ -641,8 +644,6 @@ void inet_csk_listen_stop(struct sock *sk)
 
 		sock_orphan(child);
 
-		atomic_inc(sk->sk_prot->orphan_count);
-
 		inet_csk_destroy_sock(child);
 
 		bh_unlock_sock(child);
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index 564230d..588a779 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -718,13 +718,15 @@ static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
 		if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
 			goto skip_listen_ht;
 
-		inet_listen_lock(hashinfo);
 		for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
 			struct sock *sk;
-			struct hlist_node *node;
+			struct hlist_nulls_node *node;
+			struct inet_listen_hashbucket *ilb;
 
 			num = 0;
-			sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
+			ilb = &hashinfo->listening_hash[i];
+			spin_lock_bh(&ilb->lock);
+			sk_nulls_for_each(sk, node, &ilb->head) {
 				struct inet_sock *inet = inet_sk(sk);
 
 				if (num < s_num) {
@@ -742,7 +744,7 @@ static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
 					goto syn_recv;
 
 				if (inet_csk_diag_dump(sk, skb, cb) < 0) {
-					inet_listen_unlock(hashinfo);
+					spin_unlock_bh(&ilb->lock);
 					goto done;
 				}
 
@@ -751,7 +753,7 @@ syn_recv:
 					goto next_listen;
 
 				if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
-					inet_listen_unlock(hashinfo);
+					spin_unlock_bh(&ilb->lock);
 					goto done;
 				}
 
@@ -760,12 +762,12 @@ next_listen:
 				cb->args[4] = 0;
 				++num;
 			}
+			spin_unlock_bh(&ilb->lock);
 
 			s_num = 0;
 			cb->args[3] = 0;
 			cb->args[4] = 0;
 		}
-		inet_listen_unlock(hashinfo);
 skip_listen_ht:
 		cb->args[0] = 1;
 		s_i = num = s_num = 0;
@@ -776,20 +778,21 @@ skip_listen_ht:
 
 	for (i = s_i; i < hashinfo->ehash_size; i++) {
 		struct inet_ehash_bucket *head = &hashinfo->ehash[i];
-		rwlock_t *lock = inet_ehash_lockp(hashinfo, i);
+		spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
 		struct sock *sk;
-		struct hlist_node *node;
+		struct hlist_nulls_node *node;
 
 		num = 0;
 
-		if (hlist_empty(&head->chain) && hlist_empty(&head->twchain))
+		if (hlist_nulls_empty(&head->chain) &&
+			hlist_nulls_empty(&head->twchain))
 			continue;
 
 		if (i > s_i)
 			s_num = 0;
 
-		read_lock_bh(lock);
-		sk_for_each(sk, node, &head->chain) {
+		spin_lock_bh(lock);
+		sk_nulls_for_each(sk, node, &head->chain) {
 			struct inet_sock *inet = inet_sk(sk);
 
 			if (num < s_num)
@@ -803,7 +806,7 @@ skip_listen_ht:
 			    r->id.idiag_dport)
 				goto next_normal;
 			if (inet_csk_diag_dump(sk, skb, cb) < 0) {
-				read_unlock_bh(lock);
+				spin_unlock_bh(lock);
 				goto done;
 			}
 next_normal:
@@ -825,14 +828,14 @@ next_normal:
 				    r->id.idiag_dport)
 					goto next_dying;
 				if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
-					read_unlock_bh(lock);
+					spin_unlock_bh(lock);
 					goto done;
 				}
 next_dying:
 				++num;
 			}
 		}
-		read_unlock_bh(lock);
+		spin_unlock_bh(lock);
 	}
 
 done:
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 4498190..6a1045d 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -35,7 +35,7 @@ struct inet_bind_bucket *inet_bind_bucket_create(struct kmem_cache *cachep,
 	struct inet_bind_bucket *tb = kmem_cache_alloc(cachep, GFP_ATOMIC);
 
 	if (tb != NULL) {
-		tb->ib_net       = hold_net(net);
+		write_pnet(&tb->ib_net, hold_net(net));
 		tb->port      = snum;
 		tb->fastreuse = 0;
 		INIT_HLIST_HEAD(&tb->owners);
@@ -51,7 +51,7 @@ void inet_bind_bucket_destroy(struct kmem_cache *cachep, struct inet_bind_bucket
 {
 	if (hlist_empty(&tb->owners)) {
 		__hlist_del(&tb->node);
-		release_net(tb->ib_net);
+		release_net(ib_net(tb));
 		kmem_cache_free(cachep, tb);
 	}
 }
@@ -110,33 +110,29 @@ void __inet_inherit_port(struct sock *sk, struct sock *child)
 
 EXPORT_SYMBOL_GPL(__inet_inherit_port);
 
-/*
- * This lock without WQ_FLAG_EXCLUSIVE is good on UP and it can be very bad on SMP.
- * Look, when several writers sleep and reader wakes them up, all but one
- * immediately hit write lock and grab all the cpus. Exclusive sleep solves
- * this, _but_ remember, it adds useless work on UP machines (wake up each
- * exclusive lock release). It should be ifdefed really.
- */
-void inet_listen_wlock(struct inet_hashinfo *hashinfo)
-	__acquires(hashinfo->lhash_lock)
+static inline int compute_score(struct sock *sk, struct net *net,
+				const unsigned short hnum, const __be32 daddr,
+				const int dif)
 {
-	write_lock(&hashinfo->lhash_lock);
-
-	if (atomic_read(&hashinfo->lhash_users)) {
-		DEFINE_WAIT(wait);
+	int score = -1;
+	struct inet_sock *inet = inet_sk(sk);
 
-		for (;;) {
-			prepare_to_wait_exclusive(&hashinfo->lhash_wait,
-						  &wait, TASK_UNINTERRUPTIBLE);
-			if (!atomic_read(&hashinfo->lhash_users))
-				break;
-			write_unlock_bh(&hashinfo->lhash_lock);
-			schedule();
-			write_lock_bh(&hashinfo->lhash_lock);
+	if (net_eq(sock_net(sk), net) && inet->num == hnum &&
+			!ipv6_only_sock(sk)) {
+		__be32 rcv_saddr = inet->rcv_saddr;
+		score = sk->sk_family == PF_INET ? 1 : 0;
+		if (rcv_saddr) {
+			if (rcv_saddr != daddr)
+				return -1;
+			score += 2;
+		}
+		if (sk->sk_bound_dev_if) {
+			if (sk->sk_bound_dev_if != dif)
+				return -1;
+			score += 2;
 		}
-
-		finish_wait(&hashinfo->lhash_wait, &wait);
 	}
+	return score;
 }
 
 /*
@@ -145,72 +141,48 @@ void inet_listen_wlock(struct inet_hashinfo *hashinfo)
  * remote address for the connection. So always assume those are both
  * wildcarded during the search since they can never be otherwise.
  */
-static struct sock *inet_lookup_listener_slow(struct net *net,
-					      const struct hlist_head *head,
-					      const __be32 daddr,
-					      const unsigned short hnum,
-					      const int dif)
-{
-	struct sock *result = NULL, *sk;
-	const struct hlist_node *node;
-	int hiscore = -1;
-
-	sk_for_each(sk, node, head) {
-		const struct inet_sock *inet = inet_sk(sk);
-
-		if (net_eq(sock_net(sk), net) && inet->num == hnum &&
-				!ipv6_only_sock(sk)) {
-			const __be32 rcv_saddr = inet->rcv_saddr;
-			int score = sk->sk_family == PF_INET ? 1 : 0;
-
-			if (rcv_saddr) {
-				if (rcv_saddr != daddr)
-					continue;
-				score += 2;
-			}
-			if (sk->sk_bound_dev_if) {
-				if (sk->sk_bound_dev_if != dif)
-					continue;
-				score += 2;
-			}
-			if (score == 5)
-				return sk;
-			if (score > hiscore) {
-				hiscore	= score;
-				result	= sk;
-			}
-		}
-	}
-	return result;
-}
 
-/* Optimize the common listener case. */
+
 struct sock *__inet_lookup_listener(struct net *net,
 				    struct inet_hashinfo *hashinfo,
 				    const __be32 daddr, const unsigned short hnum,
 				    const int dif)
 {
-	struct sock *sk = NULL;
-	const struct hlist_head *head;
-
-	read_lock(&hashinfo->lhash_lock);
-	head = &hashinfo->listening_hash[inet_lhashfn(net, hnum)];
-	if (!hlist_empty(head)) {
-		const struct inet_sock *inet = inet_sk((sk = __sk_head(head)));
-
-		if (inet->num == hnum && !sk->sk_node.next &&
-		    (!inet->rcv_saddr || inet->rcv_saddr == daddr) &&
-		    (sk->sk_family == PF_INET || !ipv6_only_sock(sk)) &&
-		    !sk->sk_bound_dev_if && net_eq(sock_net(sk), net))
-			goto sherry_cache;
-		sk = inet_lookup_listener_slow(net, head, daddr, hnum, dif);
+	struct sock *sk, *result;
+	struct hlist_nulls_node *node;
+	unsigned int hash = inet_lhashfn(net, hnum);
+	struct inet_listen_hashbucket *ilb = &hashinfo->listening_hash[hash];
+	int score, hiscore;
+
+	rcu_read_lock();
+begin:
+	result = NULL;
+	hiscore = -1;
+	sk_nulls_for_each_rcu(sk, node, &ilb->head) {
+		score = compute_score(sk, net, hnum, daddr, dif);
+		if (score > hiscore) {
+			result = sk;
+			hiscore = score;
+		}
 	}
-	if (sk) {
-sherry_cache:
-		sock_hold(sk);
+	/*
+	 * if the nulls value we got at the end of this lookup is
+	 * not the expected one, we must restart lookup.
+	 * We probably met an item that was moved to another chain.
+	 */
+	if (get_nulls_value(node) != hash + LISTENING_NULLS_BASE)
+		goto begin;
+	if (result) {
+		if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt)))
+			result = NULL;
+		else if (unlikely(compute_score(result, net, hnum, daddr,
+				  dif) < hiscore)) {
+			sock_put(result);
+			goto begin;
+		}
 	}
-	read_unlock(&hashinfo->lhash_lock);
-	return sk;
+	rcu_read_unlock();
+	return result;
 }
 EXPORT_SYMBOL_GPL(__inet_lookup_listener);
 
@@ -223,35 +195,65 @@ struct sock * __inet_lookup_established(struct net *net,
 	INET_ADDR_COOKIE(acookie, saddr, daddr)
 	const __portpair ports = INET_COMBINED_PORTS(sport, hnum);
 	struct sock *sk;
-	const struct hlist_node *node;
+	const struct hlist_nulls_node *node;
 	/* Optimize here for direct hit, only listening connections can
 	 * have wildcards anyways.
 	 */
 	unsigned int hash = inet_ehashfn(net, daddr, hnum, saddr, sport);
-	struct inet_ehash_bucket *head = inet_ehash_bucket(hashinfo, hash);
-	rwlock_t *lock = inet_ehash_lockp(hashinfo, hash);
+	unsigned int slot = hash & (hashinfo->ehash_size - 1);
+	struct inet_ehash_bucket *head = &hashinfo->ehash[slot];
 
-	prefetch(head->chain.first);
-	read_lock(lock);
-	sk_for_each(sk, node, &head->chain) {
+	rcu_read_lock();
+begin:
+	sk_nulls_for_each_rcu(sk, node, &head->chain) {
 		if (INET_MATCH(sk, net, hash, acookie,
-					saddr, daddr, ports, dif))
-			goto hit; /* You sunk my battleship! */
+					saddr, daddr, ports, dif)) {
+			if (unlikely(!atomic_inc_not_zero(&sk->sk_refcnt)))
+				goto begintw;
+			if (unlikely(!INET_MATCH(sk, net, hash, acookie,
+				saddr, daddr, ports, dif))) {
+				sock_put(sk);
+				goto begin;
+			}
+			goto out;
+		}
 	}
+	/*
+	 * if the nulls value we got at the end of this lookup is
+	 * not the expected one, we must restart lookup.
+	 * We probably met an item that was moved to another chain.
+	 */
+	if (get_nulls_value(node) != slot)
+		goto begin;
 
+begintw:
 	/* Must check for a TIME_WAIT'er before going to listener hash. */
-	sk_for_each(sk, node, &head->twchain) {
+	sk_nulls_for_each_rcu(sk, node, &head->twchain) {
 		if (INET_TW_MATCH(sk, net, hash, acookie,
-					saddr, daddr, ports, dif))
-			goto hit;
+					saddr, daddr, ports, dif)) {
+			if (unlikely(!atomic_inc_not_zero(&sk->sk_refcnt))) {
+				sk = NULL;
+				goto out;
+			}
+			if (unlikely(!INET_TW_MATCH(sk, net, hash, acookie,
+				 saddr, daddr, ports, dif))) {
+				sock_put(sk);
+				goto begintw;
+			}
+			goto out;
+		}
 	}
+	/*
+	 * if the nulls value we got at the end of this lookup is
+	 * not the expected one, we must restart lookup.
+	 * We probably met an item that was moved to another chain.
+	 */
+	if (get_nulls_value(node) != slot)
+		goto begintw;
 	sk = NULL;
 out:
-	read_unlock(lock);
+	rcu_read_unlock();
 	return sk;
-hit:
-	sock_hold(sk);
-	goto out;
 }
 EXPORT_SYMBOL_GPL(__inet_lookup_established);
 
@@ -270,16 +272,15 @@ static int __inet_check_established(struct inet_timewait_death_row *death_row,
 	struct net *net = sock_net(sk);
 	unsigned int hash = inet_ehashfn(net, daddr, lport, saddr, inet->dport);
 	struct inet_ehash_bucket *head = inet_ehash_bucket(hinfo, hash);
-	rwlock_t *lock = inet_ehash_lockp(hinfo, hash);
+	spinlock_t *lock = inet_ehash_lockp(hinfo, hash);
 	struct sock *sk2;
-	const struct hlist_node *node;
+	const struct hlist_nulls_node *node;
 	struct inet_timewait_sock *tw;
 
-	prefetch(head->chain.first);
-	write_lock(lock);
+	spin_lock(lock);
 
 	/* Check TIME-WAIT sockets first. */
-	sk_for_each(sk2, node, &head->twchain) {
+	sk_nulls_for_each(sk2, node, &head->twchain) {
 		tw = inet_twsk(sk2);
 
 		if (INET_TW_MATCH(sk2, net, hash, acookie,
@@ -293,7 +294,7 @@ static int __inet_check_established(struct inet_timewait_death_row *death_row,
 	tw = NULL;
 
 	/* And established part... */
-	sk_for_each(sk2, node, &head->chain) {
+	sk_nulls_for_each(sk2, node, &head->chain) {
 		if (INET_MATCH(sk2, net, hash, acookie,
 					saddr, daddr, ports, dif))
 			goto not_unique;
@@ -306,9 +307,9 @@ unique:
 	inet->sport = htons(lport);
 	sk->sk_hash = hash;
 	WARN_ON(!sk_unhashed(sk));
-	__sk_add_node(sk, &head->chain);
+	__sk_nulls_add_node_rcu(sk, &head->chain);
+	spin_unlock(lock);
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
-	write_unlock(lock);
 
 	if (twp) {
 		*twp = tw;
@@ -324,7 +325,7 @@ unique:
 	return 0;
 
 not_unique:
-	write_unlock(lock);
+	spin_unlock(lock);
 	return -EADDRNOTAVAIL;
 }
 
@@ -338,8 +339,8 @@ static inline u32 inet_sk_port_offset(const struct sock *sk)
 void __inet_hash_nolisten(struct sock *sk)
 {
 	struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
-	struct hlist_head *list;
-	rwlock_t *lock;
+	struct hlist_nulls_head *list;
+	spinlock_t *lock;
 	struct inet_ehash_bucket *head;
 
 	WARN_ON(!sk_unhashed(sk));
@@ -349,18 +350,17 @@ void __inet_hash_nolisten(struct sock *sk)
 	list = &head->chain;
 	lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
 
-	write_lock(lock);
-	__sk_add_node(sk, list);
+	spin_lock(lock);
+	__sk_nulls_add_node_rcu(sk, list);
+	spin_unlock(lock);
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
-	write_unlock(lock);
 }
 EXPORT_SYMBOL_GPL(__inet_hash_nolisten);
 
 static void __inet_hash(struct sock *sk)
 {
 	struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
-	struct hlist_head *list;
-	rwlock_t *lock;
+	struct inet_listen_hashbucket *ilb;
 
 	if (sk->sk_state != TCP_LISTEN) {
 		__inet_hash_nolisten(sk);
@@ -368,14 +368,12 @@ static void __inet_hash(struct sock *sk)
 	}
 
 	WARN_ON(!sk_unhashed(sk));
-	list = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
-	lock = &hashinfo->lhash_lock;
+	ilb = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
 
-	inet_listen_wlock(hashinfo);
-	__sk_add_node(sk, list);
+	spin_lock(&ilb->lock);
+	__sk_nulls_add_node_rcu(sk, &ilb->head);
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
-	write_unlock(lock);
-	wake_up(&hashinfo->lhash_wait);
+	spin_unlock(&ilb->lock);
 }
 
 void inet_hash(struct sock *sk)
@@ -390,27 +388,23 @@ EXPORT_SYMBOL_GPL(inet_hash);
 
 void inet_unhash(struct sock *sk)
 {
-	rwlock_t *lock;
 	struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
+	spinlock_t *lock;
+	int done;
 
 	if (sk_unhashed(sk))
-		goto out;
+		return;
 
-	if (sk->sk_state == TCP_LISTEN) {
-		local_bh_disable();
-		inet_listen_wlock(hashinfo);
-		lock = &hashinfo->lhash_lock;
-	} else {
+	if (sk->sk_state == TCP_LISTEN)
+		lock = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)].lock;
+	else
 		lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
-		write_lock_bh(lock);
-	}
 
-	if (__sk_del_node_init(sk))
+	spin_lock_bh(lock);
+	done =__sk_nulls_del_node_init_rcu(sk);
+	if (done)
 		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
-	write_unlock_bh(lock);
-out:
-	if (sk->sk_state == TCP_LISTEN)
-		wake_up(&hashinfo->lhash_wait);
+	spin_unlock_bh(lock);
 }
 EXPORT_SYMBOL_GPL(inet_unhash);
 
@@ -449,7 +443,7 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
 			 * unique enough.
 			 */
 			inet_bind_bucket_for_each(tb, node, &head->chain) {
-				if (tb->ib_net == net && tb->port == port) {
+				if (ib_net(tb) == net && tb->port == port) {
 					WARN_ON(hlist_empty(&tb->owners));
 					if (tb->fastreuse >= 0)
 						goto next_port;
@@ -524,3 +518,16 @@ int inet_hash_connect(struct inet_timewait_death_row *death_row,
 }
 
 EXPORT_SYMBOL_GPL(inet_hash_connect);
+
+void inet_hashinfo_init(struct inet_hashinfo *h)
+{
+	int i;
+
+	for (i = 0; i < INET_LHTABLE_SIZE; i++) {
+		spin_lock_init(&h->listening_hash[i].lock);
+		INIT_HLIST_NULLS_HEAD(&h->listening_hash[i].head,
+				      i + LISTENING_NULLS_BASE);
+		}
+}
+
+EXPORT_SYMBOL_GPL(inet_hashinfo_init);
diff --git a/net/ipv4/inet_lro.c b/net/ipv4/inet_lro.c
index cfd034a..6a667da 100644
--- a/net/ipv4/inet_lro.c
+++ b/net/ipv4/inet_lro.c
@@ -120,7 +120,7 @@ static void lro_update_tcp_ip_header(struct net_lro_desc *lro_desc)
 	iph->check = ip_fast_csum((u8 *)lro_desc->iph, iph->ihl);
 
 	tcph->check = 0;
-	tcp_hdr_csum = csum_partial((u8 *)tcph, TCP_HDR_LEN(tcph), 0);
+	tcp_hdr_csum = csum_partial(tcph, TCP_HDR_LEN(tcph), 0);
 	lro_desc->data_csum = csum_add(lro_desc->data_csum, tcp_hdr_csum);
 	tcph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
 					lro_desc->ip_tot_len -
@@ -135,7 +135,7 @@ static __wsum lro_tcp_data_csum(struct iphdr *iph, struct tcphdr *tcph, int len)
 	__wsum tcp_ps_hdr_csum;
 
 	tcp_csum = ~csum_unfold(tcph->check);
-	tcp_hdr_csum = csum_partial((u8 *)tcph, TCP_HDR_LEN(tcph), tcp_csum);
+	tcp_hdr_csum = csum_partial(tcph, TCP_HDR_LEN(tcph), tcp_csum);
 
 	tcp_ps_hdr_csum = csum_tcpudp_nofold(iph->saddr, iph->daddr,
 					     len + TCP_HDR_LEN(tcph),
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
index 1c5fd38..8554d0e 100644
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c
@@ -20,16 +20,16 @@ static void __inet_twsk_kill(struct inet_timewait_sock *tw,
 	struct inet_bind_hashbucket *bhead;
 	struct inet_bind_bucket *tb;
 	/* Unlink from established hashes. */
-	rwlock_t *lock = inet_ehash_lockp(hashinfo, tw->tw_hash);
+	spinlock_t *lock = inet_ehash_lockp(hashinfo, tw->tw_hash);
 
-	write_lock(lock);
-	if (hlist_unhashed(&tw->tw_node)) {
-		write_unlock(lock);
+	spin_lock(lock);
+	if (hlist_nulls_unhashed(&tw->tw_node)) {
+		spin_unlock(lock);
 		return;
 	}
-	__hlist_del(&tw->tw_node);
-	sk_node_init(&tw->tw_node);
-	write_unlock(lock);
+	hlist_nulls_del_rcu(&tw->tw_node);
+	sk_nulls_node_init(&tw->tw_node);
+	spin_unlock(lock);
 
 	/* Disassociate with bind bucket. */
 	bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), tw->tw_num,
@@ -76,7 +76,7 @@ void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,
 	const struct inet_sock *inet = inet_sk(sk);
 	const struct inet_connection_sock *icsk = inet_csk(sk);
 	struct inet_ehash_bucket *ehead = inet_ehash_bucket(hashinfo, sk->sk_hash);
-	rwlock_t *lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
+	spinlock_t *lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
 	struct inet_bind_hashbucket *bhead;
 	/* Step 1: Put TW into bind hash. Original socket stays there too.
 	   Note, that any socket with inet->num != 0 MUST be bound in
@@ -90,17 +90,21 @@ void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,
 	inet_twsk_add_bind_node(tw, &tw->tw_tb->owners);
 	spin_unlock(&bhead->lock);
 
-	write_lock(lock);
+	spin_lock(lock);
 
-	/* Step 2: Remove SK from established hash. */
-	if (__sk_del_node_init(sk))
-		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
-
-	/* Step 3: Hash TW into TIMEWAIT chain. */
-	inet_twsk_add_node(tw, &ehead->twchain);
+	/*
+	 * Step 2: Hash TW into TIMEWAIT chain.
+	 * Should be done before removing sk from established chain
+	 * because readers are lockless and search established first.
+	 */
 	atomic_inc(&tw->tw_refcnt);
+	inet_twsk_add_node_rcu(tw, &ehead->twchain);
 
-	write_unlock(lock);
+	/* Step 3: Remove SK from established hash. */
+	if (__sk_nulls_del_node_init_rcu(sk))
+		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
+
+	spin_unlock(lock);
 }
 
 EXPORT_SYMBOL_GPL(__inet_twsk_hashdance);
@@ -416,17 +420,17 @@ void inet_twsk_purge(struct net *net, struct inet_hashinfo *hashinfo,
 {
 	struct inet_timewait_sock *tw;
 	struct sock *sk;
-	struct hlist_node *node;
+	struct hlist_nulls_node *node;
 	int h;
 
 	local_bh_disable();
 	for (h = 0; h < (hashinfo->ehash_size); h++) {
 		struct inet_ehash_bucket *head =
 			inet_ehash_bucket(hashinfo, h);
-		rwlock_t *lock = inet_ehash_lockp(hashinfo, h);
+		spinlock_t *lock = inet_ehash_lockp(hashinfo, h);
 restart:
-		write_lock(lock);
-		sk_for_each(sk, node, &head->twchain) {
+		spin_lock(lock);
+		sk_nulls_for_each(sk, node, &head->twchain) {
 
 			tw = inet_twsk(sk);
 			if (!net_eq(twsk_net(tw), net) ||
@@ -434,13 +438,13 @@ restart:
 				continue;
 
 			atomic_inc(&tw->tw_refcnt);
-			write_unlock(lock);
+			spin_unlock(lock);
 			inet_twsk_deschedule(tw, twdr);
 			inet_twsk_put(tw);
 
 			goto restart;
 		}
-		write_unlock(lock);
+		spin_unlock(lock);
 	}
 	local_bh_enable();
 }
diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c
index a456cee..b1fbe18 100644
--- a/net/ipv4/inetpeer.c
+++ b/net/ipv4/inetpeer.c
@@ -144,7 +144,7 @@ static void unlink_from_unused(struct inet_peer *p)
  * _stack is known to be NULL or not at compile time,
  * so compiler will optimize the if (_stack) tests.
  */
-#define lookup(_daddr,_stack) 					\
+#define lookup(_daddr, _stack) 					\
 ({								\
 	struct inet_peer *u, **v;				\
 	if (_stack != NULL) {					\
diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index 450016b..df3fe50 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -106,7 +106,7 @@ int ip_forward(struct sk_buff *skb)
 	 *	We now generate an ICMP HOST REDIRECT giving the route
 	 *	we calculated.
 	 */
-	if (rt->rt_flags&RTCF_DOREDIRECT && !opt->srr && !skb->sp)
+	if (rt->rt_flags&RTCF_DOREDIRECT && !opt->srr && !skb_sec_path(skb))
 		ip_rt_send_redirect(skb);
 
 	skb->priority = rt_tos2priority(iph->tos);
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index e4f81f5..6659ac0 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -56,7 +56,7 @@ struct ipfrag_skb_cb
 	int			offset;
 };
 
-#define FRAG_CB(skb)	((struct ipfrag_skb_cb*)((skb)->cb))
+#define FRAG_CB(skb)	((struct ipfrag_skb_cb *)((skb)->cb))
 
 /* Describe an entry in the "incomplete datagrams" queue. */
 struct ipq {
@@ -559,9 +559,8 @@ out_nomem:
 	goto out_fail;
 out_oversize:
 	if (net_ratelimit())
-		printk(KERN_INFO
-			"Oversized IP packet from " NIPQUAD_FMT ".\n",
-			NIPQUAD(qp->saddr));
+		printk(KERN_INFO "Oversized IP packet from %pI4.\n",
+			&qp->saddr);
 out_fail:
 	IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_REASMFAILS);
 	return err;
@@ -608,7 +607,7 @@ static struct ctl_table ip4_frags_ns_ctl_table[] = {
 		.data		= &init_net.ipv4.frags.high_thresh,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_IPFRAG_LOW_THRESH,
@@ -616,7 +615,7 @@ static struct ctl_table ip4_frags_ns_ctl_table[] = {
 		.data		= &init_net.ipv4.frags.low_thresh,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_IPFRAG_TIME,
@@ -624,8 +623,8 @@ static struct ctl_table ip4_frags_ns_ctl_table[] = {
 		.data		= &init_net.ipv4.frags.timeout,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies
 	},
 	{ }
 };
@@ -637,15 +636,15 @@ static struct ctl_table ip4_frags_ctl_table[] = {
 		.data		= &ip4_frags.secret_interval,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies
 	},
 	{
 		.procname	= "ipfrag_max_dist",
 		.data		= &sysctl_ipfrag_max_dist,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
+		.proc_handler	= proc_dointvec_minmax,
 		.extra1		= &zero
 	},
 	{ }
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 85c487b..0101521 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -126,8 +126,6 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev);
 
 /* Fallback tunnel: no source, no destination, no key, no options */
 
-static int ipgre_fb_tunnel_init(struct net_device *dev);
-
 #define HASH_SIZE  16
 
 static int ipgre_net_id;
@@ -371,7 +369,7 @@ static void ipgre_err(struct sk_buff *skb, u32 info)
    by themself???
  */
 
-	struct iphdr *iph = (struct iphdr*)skb->data;
+	struct iphdr *iph = (struct iphdr *)skb->data;
 	__be16	     *p = (__be16*)(skb->data+(iph->ihl<<2));
 	int grehlen = (iph->ihl<<2) + 4;
 	const int type = icmp_hdr(skb)->type;
@@ -632,7 +630,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	if (dev->header_ops && dev->type == ARPHRD_IPGRE) {
 		gre_hlen = 0;
-		tiph = (struct iphdr*)skb->data;
+		tiph = (struct iphdr *)skb->data;
 	} else {
 		gre_hlen = tunnel->hlen;
 		tiph = &tunnel->parms.iph;
@@ -660,7 +658,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 			if (neigh == NULL)
 				goto tx_error;
 
-			addr6 = (struct in6_addr*)&neigh->primary_key;
+			addr6 = (struct in6_addr *)&neigh->primary_key;
 			addr_type = ipv6_addr_type(addr6);
 
 			if (addr_type == IPV6_ADDR_ANY) {
@@ -726,7 +724,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	}
 #ifdef CONFIG_IPV6
 	else if (skb->protocol == htons(ETH_P_IPV6)) {
-		struct rt6_info *rt6 = (struct rt6_info*)skb->dst;
+		struct rt6_info *rt6 = (struct rt6_info *)skb->dst;
 
 		if (rt6 && mtu < dst_mtu(skb->dst) && mtu >= IPV6_MIN_MTU) {
 			if ((tunnel->parms.iph.daddr &&
@@ -800,7 +798,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 			iph->ttl = old_iph->ttl;
 #ifdef CONFIG_IPV6
 		else if (skb->protocol == htons(ETH_P_IPV6))
-			iph->ttl = ((struct ipv6hdr*)old_iph)->hop_limit;
+			iph->ttl = ((struct ipv6hdr *)old_iph)->hop_limit;
 #endif
 		else
 			iph->ttl = dst_metric(&rt->u.dst, RTAX_HOPLIMIT);
@@ -962,7 +960,7 @@ ipgre_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
 					break;
 				}
 			} else {
-				unsigned nflags=0;
+				unsigned nflags = 0;
 
 				t = netdev_priv(dev);
 
@@ -1104,7 +1102,7 @@ static int ipgre_header(struct sk_buff *skb, struct net_device *dev,
 
 static int ipgre_header_parse(const struct sk_buff *skb, unsigned char *haddr)
 {
-	struct iphdr *iph = (struct iphdr*) skb_mac_header(skb);
+	struct iphdr *iph = (struct iphdr *) skb_mac_header(skb);
 	memcpy(haddr, &iph->saddr, 4);
 	return 4;
 }
@@ -1142,6 +1140,7 @@ static int ipgre_open(struct net_device *dev)
 static int ipgre_close(struct net_device *dev)
 {
 	struct ip_tunnel *t = netdev_priv(dev);
+
 	if (ipv4_is_multicast(t->parms.iph.daddr) && t->mlink) {
 		struct in_device *in_dev;
 		in_dev = inetdev_by_index(dev_net(dev), t->mlink);
@@ -1155,14 +1154,22 @@ static int ipgre_close(struct net_device *dev)
 
 #endif
 
+static const struct net_device_ops ipgre_netdev_ops = {
+	.ndo_init		= ipgre_tunnel_init,
+	.ndo_uninit		= ipgre_tunnel_uninit,
+#ifdef CONFIG_NET_IPGRE_BROADCAST
+	.ndo_open		= ipgre_open,
+	.ndo_stop		= ipgre_close,
+#endif
+	.ndo_start_xmit		= ipgre_tunnel_xmit,
+	.ndo_do_ioctl		= ipgre_tunnel_ioctl,
+	.ndo_change_mtu		= ipgre_tunnel_change_mtu,
+};
+
 static void ipgre_tunnel_setup(struct net_device *dev)
 {
-	dev->init		= ipgre_tunnel_init;
-	dev->uninit		= ipgre_tunnel_uninit;
+	dev->netdev_ops		= &ipgre_netdev_ops;
 	dev->destructor 	= free_netdev;
-	dev->hard_start_xmit	= ipgre_tunnel_xmit;
-	dev->do_ioctl		= ipgre_tunnel_ioctl;
-	dev->change_mtu		= ipgre_tunnel_change_mtu;
 
 	dev->type		= ARPHRD_IPGRE;
 	dev->needed_headroom 	= LL_MAX_HEADER + sizeof(struct iphdr) + 4;
@@ -1194,8 +1201,6 @@ static int ipgre_tunnel_init(struct net_device *dev)
 				return -EINVAL;
 			dev->flags = IFF_BROADCAST;
 			dev->header_ops = &ipgre_header_ops;
-			dev->open = ipgre_open;
-			dev->stop = ipgre_close;
 		}
 #endif
 	} else
@@ -1204,7 +1209,7 @@ static int ipgre_tunnel_init(struct net_device *dev)
 	return 0;
 }
 
-static int ipgre_fb_tunnel_init(struct net_device *dev)
+static void ipgre_fb_tunnel_init(struct net_device *dev)
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
 	struct iphdr *iph = &tunnel->parms.iph;
@@ -1220,7 +1225,6 @@ static int ipgre_fb_tunnel_init(struct net_device *dev)
 
 	dev_hold(dev);
 	ign->tunnels_wc[0]	= tunnel;
-	return 0;
 }
 
 
@@ -1264,9 +1268,9 @@ static int ipgre_init_net(struct net *net)
 		err = -ENOMEM;
 		goto err_alloc_dev;
 	}
-
-	ign->fb_tunnel_dev->init = ipgre_fb_tunnel_init;
 	dev_net_set(ign->fb_tunnel_dev, net);
+
+	ipgre_fb_tunnel_init(ign->fb_tunnel_dev);
 	ign->fb_tunnel_dev->rtnl_link_ops = &ipgre_link_ops;
 
 	if ((err = register_netdev(ign->fb_tunnel_dev)))
@@ -1397,16 +1401,22 @@ static int ipgre_tap_init(struct net_device *dev)
 	return 0;
 }
 
+static const struct net_device_ops ipgre_tap_netdev_ops = {
+	.ndo_init		= ipgre_tap_init,
+	.ndo_uninit		= ipgre_tunnel_uninit,
+	.ndo_start_xmit		= ipgre_tunnel_xmit,
+	.ndo_set_mac_address 	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_change_mtu		= ipgre_tunnel_change_mtu,
+};
+
 static void ipgre_tap_setup(struct net_device *dev)
 {
 
 	ether_setup(dev);
 
-	dev->init		= ipgre_tap_init;
-	dev->uninit		= ipgre_tunnel_uninit;
+	dev->netdev_ops		= &ipgre_netdev_ops;
 	dev->destructor 	= free_netdev;
-	dev->hard_start_xmit	= ipgre_tunnel_xmit;
-	dev->change_mtu		= ipgre_tunnel_change_mtu;
 
 	dev->iflink		= 0;
 	dev->features		|= NETIF_F_NETNS_LOCAL;
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index cfb38ac..1a58a6f 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -302,10 +302,8 @@ static inline int ip_rcv_options(struct sk_buff *skb)
 			if (!IN_DEV_SOURCE_ROUTE(in_dev)) {
 				if (IN_DEV_LOG_MARTIANS(in_dev) &&
 				    net_ratelimit())
-					printk(KERN_INFO "source route option "
-					       NIPQUAD_FMT " -> " NIPQUAD_FMT "\n",
-					       NIPQUAD(iph->saddr),
-					       NIPQUAD(iph->daddr));
+					printk(KERN_INFO "source route option %pI4 -> %pI4\n",
+					       &iph->saddr, &iph->daddr);
 				in_dev_put(in_dev);
 				goto drop;
 			}
@@ -350,9 +348,9 @@ static int ip_rcv_finish(struct sk_buff *skb)
 		struct ip_rt_acct *st = per_cpu_ptr(ip_rt_acct, smp_processor_id());
 		u32 idx = skb->dst->tclassid;
 		st[idx&0xFF].o_packets++;
-		st[idx&0xFF].o_bytes+=skb->len;
+		st[idx&0xFF].o_bytes += skb->len;
 		st[(idx>>16)&0xFF].i_packets++;
-		st[(idx>>16)&0xFF].i_bytes+=skb->len;
+		st[(idx>>16)&0xFF].i_bytes += skb->len;
 	}
 #endif
 
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index d2a8f8b..8ebe86dd 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -430,7 +430,7 @@ static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
  *	single device frame, and queue such a frame for sending.
  */
 
-int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
+int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 {
 	struct iphdr *iph;
 	int raw = 0;
@@ -720,7 +720,7 @@ static inline int ip_ufo_append_data(struct sock *sk,
 			int getfrag(void *from, char *to, int offset, int len,
 			       int odd, struct sk_buff *skb),
 			void *from, int length, int hh_len, int fragheaderlen,
-			int transhdrlen, int mtu,unsigned int flags)
+			int transhdrlen, int mtu, unsigned int flags)
 {
 	struct sk_buff *skb;
 	int err;
@@ -741,7 +741,7 @@ static inline int ip_ufo_append_data(struct sock *sk,
 		skb_reserve(skb, hh_len);
 
 		/* create space for UDP/IP header */
-		skb_put(skb,fragheaderlen + transhdrlen);
+		skb_put(skb, fragheaderlen + transhdrlen);
 
 		/* initialize network header pointer */
 		skb_reset_network_header(skb);
@@ -778,7 +778,7 @@ int ip_append_data(struct sock *sk,
 		   int getfrag(void *from, char *to, int offset, int len,
 			       int odd, struct sk_buff *skb),
 		   void *from, int length, int transhdrlen,
-		   struct ipcm_cookie *ipc, struct rtable *rt,
+		   struct ipcm_cookie *ipc, struct rtable **rtp,
 		   unsigned int flags)
 {
 	struct inet_sock *inet = inet_sk(sk);
@@ -793,6 +793,7 @@ int ip_append_data(struct sock *sk,
 	int offset = 0;
 	unsigned int maxfraglen, fragheaderlen;
 	int csummode = CHECKSUM_NONE;
+	struct rtable *rt;
 
 	if (flags&MSG_PROBE)
 		return 0;
@@ -812,7 +813,11 @@ int ip_append_data(struct sock *sk,
 			inet->cork.flags |= IPCORK_OPT;
 			inet->cork.addr = ipc->addr;
 		}
-		dst_hold(&rt->u.dst);
+		rt = *rtp;
+		/*
+		 * We steal reference to this route, caller should not release it
+		 */
+		*rtp = NULL;
 		inet->cork.fragsize = mtu = inet->pmtudisc == IP_PMTUDISC_PROBE ?
 					    rt->u.dst.dev->mtu :
 					    dst_mtu(rt->u.dst.path);
@@ -1279,7 +1284,12 @@ int ip_push_pending_frames(struct sock *sk)
 
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;
-	skb->dst = dst_clone(&rt->u.dst);
+	/*
+	 * Steal rt from cork.dst to avoid a pair of atomic_inc/atomic_dec
+	 * on dst refcount
+	 */
+	inet->cork.dst = NULL;
+	skb->dst = &rt->u.dst;
 
 	if (iph->protocol == IPPROTO_ICMP)
 		icmp_out_count(net, ((struct icmphdr *)
@@ -1391,7 +1401,7 @@ void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *ar
 	sk->sk_protocol = ip_hdr(skb)->protocol;
 	sk->sk_bound_dev_if = arg->bound_dev_if;
 	ip_append_data(sk, ip_reply_glue_bits, arg->iov->iov_base, len, 0,
-		       &ipc, rt, MSG_DONTWAIT);
+		       &ipc, &rt, MSG_DONTWAIT);
 	if ((skb = skb_peek(&sk->sk_write_queue)) != NULL) {
 		if (arg->csumoffset >= 0)
 			*((__sum16 *)skb_transport_header(skb) +
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 465abf0..43c0585 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -48,6 +48,7 @@
 #define IP_CMSG_RECVOPTS	8
 #define IP_CMSG_RETOPTS		16
 #define IP_CMSG_PASSSEC		32
+#define IP_CMSG_ORIGDSTADDR     64
 
 /*
  *	SOL_IP control messages.
@@ -94,7 +95,7 @@ static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb)
 static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb)
 {
 	unsigned char optbuf[sizeof(struct ip_options) + 40];
-	struct ip_options * opt = (struct ip_options*)optbuf;
+	struct ip_options * opt = (struct ip_options *)optbuf;
 
 	if (IPCB(skb)->opt.optlen == 0)
 		return;
@@ -126,6 +127,27 @@ static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb)
 	security_release_secctx(secdata, seclen);
 }
 
+static void ip_cmsg_recv_dstaddr(struct msghdr *msg, struct sk_buff *skb)
+{
+	struct sockaddr_in sin;
+	struct iphdr *iph = ip_hdr(skb);
+	__be16 *ports = (__be16 *)skb_transport_header(skb);
+
+	if (skb_transport_offset(skb) + 4 > skb->len)
+		return;
+
+	/* All current transport protocols have the port numbers in the
+	 * first four bytes of the transport header and this function is
+	 * written with this assumption in mind.
+	 */
+
+	sin.sin_family = AF_INET;
+	sin.sin_addr.s_addr = iph->daddr;
+	sin.sin_port = ports[1];
+	memset(sin.sin_zero, 0, sizeof(sin.sin_zero));
+
+	put_cmsg(msg, SOL_IP, IP_ORIGDSTADDR, sizeof(sin), &sin);
+}
 
 void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
 {
@@ -160,6 +182,12 @@ void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
 
 	if (flags & 1)
 		ip_cmsg_recv_security(msg, skb);
+
+	if ((flags>>=1) == 0)
+		return;
+	if (flags & 1)
+		ip_cmsg_recv_dstaddr(msg, skb);
+
 }
 
 int ip_cmsg_send(struct net *net, struct msghdr *msg, struct ipcm_cookie *ipc)
@@ -411,7 +439,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 			    int optname, char __user *optval, int optlen)
 {
 	struct inet_sock *inet = inet_sk(sk);
-	int val=0,err;
+	int val = 0, err;
 
 	if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) |
 			     (1<<IP_RECVOPTS) | (1<<IP_RECVTOS) |
@@ -421,7 +449,8 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 			     (1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND) |
 			     (1<<IP_PASSSEC) | (1<<IP_TRANSPARENT))) ||
 	    optname == IP_MULTICAST_TTL ||
-	    optname == IP_MULTICAST_LOOP) {
+	    optname == IP_MULTICAST_LOOP ||
+	    optname == IP_RECVORIGDSTADDR) {
 		if (optlen >= sizeof(int)) {
 			if (get_user(val, (int __user *) optval))
 				return -EFAULT;
@@ -437,7 +466,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 	/* If optlen==0, it is equivalent to val == 0 */
 
 	if (ip_mroute_opt(optname))
-		return ip_mroute_setsockopt(sk,optname,optval,optlen);
+		return ip_mroute_setsockopt(sk, optname, optval, optlen);
 
 	err = 0;
 	lock_sock(sk);
@@ -509,6 +538,12 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 		else
 			inet->cmsg_flags &= ~IP_CMSG_PASSSEC;
 		break;
+	case IP_RECVORIGDSTADDR:
+		if (val)
+			inet->cmsg_flags |= IP_CMSG_ORIGDSTADDR;
+		else
+			inet->cmsg_flags &= ~IP_CMSG_ORIGDSTADDR;
+		break;
 	case IP_TOS:	/* This sets both TOS and Precedence */
 		if (sk->sk_type == SOCK_STREAM) {
 			val &= ~3;
@@ -549,7 +584,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 			goto e_inval;
 		if (optlen<1)
 			goto e_inval;
-		if (val==-1)
+		if (val == -1)
 			val = 1;
 		if (val < 0 || val > 255)
 			goto e_inval;
@@ -573,12 +608,12 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 
 		err = -EFAULT;
 		if (optlen >= sizeof(struct ip_mreqn)) {
-			if (copy_from_user(&mreq,optval,sizeof(mreq)))
+			if (copy_from_user(&mreq, optval, sizeof(mreq)))
 				break;
 		} else {
 			memset(&mreq, 0, sizeof(mreq));
 			if (optlen >= sizeof(struct in_addr) &&
-			    copy_from_user(&mreq.imr_address,optval,sizeof(struct in_addr)))
+			    copy_from_user(&mreq.imr_address, optval, sizeof(struct in_addr)))
 				break;
 		}
 
@@ -626,11 +661,11 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 			goto e_inval;
 		err = -EFAULT;
 		if (optlen >= sizeof(struct ip_mreqn)) {
-			if (copy_from_user(&mreq,optval,sizeof(mreq)))
+			if (copy_from_user(&mreq, optval, sizeof(mreq)))
 				break;
 		} else {
 			memset(&mreq, 0, sizeof(mreq));
-			if (copy_from_user(&mreq,optval,sizeof(struct ip_mreq)))
+			if (copy_from_user(&mreq, optval, sizeof(struct ip_mreq)))
 				break;
 		}
 
@@ -808,7 +843,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 			err = -ENOBUFS;
 			break;
 		}
-		gsf = kmalloc(optlen,GFP_KERNEL);
+		gsf = kmalloc(optlen, GFP_KERNEL);
 		if (!gsf) {
 			err = -ENOBUFS;
 			break;
@@ -828,7 +863,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 			goto mc_msf_out;
 		}
 		msize = IP_MSFILTER_SIZE(gsf->gf_numsrc);
-		msf = kmalloc(msize,GFP_KERNEL);
+		msf = kmalloc(msize, GFP_KERNEL);
 		if (!msf) {
 			err = -ENOBUFS;
 			goto mc_msf_out;
@@ -971,9 +1006,9 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname,
 		return -EOPNOTSUPP;
 
 	if (ip_mroute_opt(optname))
-		return ip_mroute_getsockopt(sk,optname,optval,optlen);
+		return ip_mroute_getsockopt(sk, optname, optval, optlen);
 
-	if (get_user(len,optlen))
+	if (get_user(len, optlen))
 		return -EFAULT;
 	if (len < 0)
 		return -EINVAL;
@@ -984,7 +1019,7 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname,
 	case IP_OPTIONS:
 	{
 		unsigned char optbuf[sizeof(struct ip_options)+40];
-		struct ip_options * opt = (struct ip_options*)optbuf;
+		struct ip_options * opt = (struct ip_options *)optbuf;
 		opt->optlen = 0;
 		if (inet->opt)
 			memcpy(optbuf, inet->opt,
@@ -1022,6 +1057,9 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname,
 	case IP_PASSSEC:
 		val = (inet->cmsg_flags & IP_CMSG_PASSSEC) != 0;
 		break;
+	case IP_RECVORIGDSTADDR:
+		val = (inet->cmsg_flags & IP_CMSG_ORIGDSTADDR) != 0;
+		break;
 	case IP_TOS:
 		val = inet->tos;
 		break;
@@ -1154,13 +1192,13 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname,
 		len = 1;
 		if (put_user(len, optlen))
 			return -EFAULT;
-		if (copy_to_user(optval,&ucval,1))
+		if (copy_to_user(optval, &ucval, 1))
 			return -EFAULT;
 	} else {
 		len = min_t(unsigned int, sizeof(int), len);
 		if (put_user(len, optlen))
 			return -EFAULT;
-		if (copy_to_user(optval,&val,len))
+		if (copy_to_user(optval, &val, len))
 			return -EFAULT;
 	}
 	return 0;
@@ -1178,7 +1216,7 @@ int ip_getsockopt(struct sock *sk, int level,
 			!ip_mroute_opt(optname)) {
 		int len;
 
-		if (get_user(len,optlen))
+		if (get_user(len, optlen))
 			return -EFAULT;
 
 		lock_sock(sk);
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 38ccb6d..3262ce0 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -35,12 +35,12 @@ static void ipcomp4_err(struct sk_buff *skb, u32 info)
 		return;
 
 	spi = htonl(ntohs(ipch->cpi));
-	x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr,
+	x = xfrm_state_lookup(&init_net, (xfrm_address_t *)&iph->daddr,
 			      spi, IPPROTO_COMP, AF_INET);
 	if (!x)
 		return;
-	NETDEBUG(KERN_DEBUG "pmtu discovery on SA IPCOMP/%08x/" NIPQUAD_FMT "\n",
-		 spi, NIPQUAD(iph->daddr));
+	NETDEBUG(KERN_DEBUG "pmtu discovery on SA IPCOMP/%08x/%pI4\n",
+		 spi, &iph->daddr);
 	xfrm_state_put(x);
 }
 
@@ -49,7 +49,7 @@ static struct xfrm_state *ipcomp_tunnel_create(struct xfrm_state *x)
 {
 	struct xfrm_state *t;
 
-	t = xfrm_state_alloc();
+	t = xfrm_state_alloc(&init_net);
 	if (t == NULL)
 		goto out;
 
@@ -85,7 +85,7 @@ static int ipcomp_tunnel_attach(struct xfrm_state *x)
 	int err = 0;
 	struct xfrm_state *t;
 
-	t = xfrm_state_lookup((xfrm_address_t *)&x->id.daddr.a4,
+	t = xfrm_state_lookup(&init_net, (xfrm_address_t *)&x->id.daddr.a4,
 			      x->props.saddr.a4, IPPROTO_IPIP, AF_INET);
 	if (!t) {
 		t = ipcomp_tunnel_create(x);
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index 42065ff..42a0f3d 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -374,7 +374,7 @@ static int __init ic_defaults(void)
 	 */
 
 	if (!ic_host_name_set)
-		sprintf(init_utsname()->nodename, NIPQUAD_FMT, NIPQUAD(ic_myaddr));
+		sprintf(init_utsname()->nodename, "%pI4", &ic_myaddr);
 
 	if (root_server_addr == NONE)
 		root_server_addr = ic_servaddr;
@@ -387,11 +387,11 @@ static int __init ic_defaults(void)
 		else if (IN_CLASSC(ntohl(ic_myaddr)))
 			ic_netmask = htonl(IN_CLASSC_NET);
 		else {
-			printk(KERN_ERR "IP-Config: Unable to guess netmask for address " NIPQUAD_FMT "\n",
-				NIPQUAD(ic_myaddr));
+			printk(KERN_ERR "IP-Config: Unable to guess netmask for address %pI4\n",
+				&ic_myaddr);
 			return -1;
 		}
-		printk("IP-Config: Guessing netmask " NIPQUAD_FMT "\n", NIPQUAD(ic_netmask));
+		printk("IP-Config: Guessing netmask %pI4\n", &ic_netmask);
 	}
 
 	return 0;
@@ -979,10 +979,8 @@ static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, str
 				ic_myaddr = b->your_ip;
 				ic_servaddr = server_id;
 #ifdef IPCONFIG_DEBUG
-				printk("DHCP: Offered address " NIPQUAD_FMT,
-				       NIPQUAD(ic_myaddr));
-				printk(" by server " NIPQUAD_FMT "\n",
-				       NIPQUAD(ic_servaddr));
+				printk("DHCP: Offered address %pI4 by server %pI4\n",
+				       &ic_myaddr, &ic_servaddr);
 #endif
 				/* The DHCP indicated server address takes
 				 * precedence over the bootp header one if
@@ -1177,11 +1175,11 @@ static int __init ic_dynamic(void)
 		return -1;
 	}
 
-	printk("IP-Config: Got %s answer from " NIPQUAD_FMT ", ",
+	printk("IP-Config: Got %s answer from %pI4, ",
 		((ic_got_reply & IC_RARP) ? "RARP"
 		 : (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"),
-		NIPQUAD(ic_servaddr));
-	printk("my address is " NIPQUAD_FMT "\n", NIPQUAD(ic_myaddr));
+		&ic_servaddr);
+	printk("my address is %pI4\n", &ic_myaddr);
 
 	return 0;
 }
@@ -1206,14 +1204,12 @@ static int pnp_seq_show(struct seq_file *seq, void *v)
 			   "domain %s\n", ic_domain);
 	for (i = 0; i < CONF_NAMESERVERS_MAX; i++) {
 		if (ic_nameservers[i] != NONE)
-			seq_printf(seq,
-				   "nameserver " NIPQUAD_FMT "\n",
-				   NIPQUAD(ic_nameservers[i]));
+			seq_printf(seq, "nameserver %pI4\n",
+				   &ic_nameservers[i]);
 	}
 	if (ic_servaddr != NONE)
-		seq_printf(seq,
-			   "bootserver " NIPQUAD_FMT "\n",
-			   NIPQUAD(ic_servaddr));
+		seq_printf(seq, "bootserver %pI4\n",
+			   &ic_servaddr);
 	return 0;
 }
 
@@ -1387,13 +1383,13 @@ static int __init ip_auto_config(void)
 	 */
 	printk("IP-Config: Complete:");
 	printk("\n     device=%s", ic_dev->name);
-	printk(", addr=" NIPQUAD_FMT, NIPQUAD(ic_myaddr));
-	printk(", mask=" NIPQUAD_FMT, NIPQUAD(ic_netmask));
-	printk(", gw=" NIPQUAD_FMT, NIPQUAD(ic_gateway));
+	printk(", addr=%pI4", &ic_myaddr);
+	printk(", mask=%pI4", &ic_netmask);
+	printk(", gw=%pI4", &ic_gateway);
 	printk(",\n     host=%s, domain=%s, nis-domain=%s",
 	       utsname()->nodename, ic_domain, utsname()->domainname);
-	printk(",\n     bootserver=" NIPQUAD_FMT, NIPQUAD(ic_servaddr));
-	printk(", rootserver=" NIPQUAD_FMT, NIPQUAD(root_server_addr));
+	printk(",\n     bootserver=%pI4", &ic_servaddr);
+	printk(", rootserver=%pI4", &root_server_addr);
 	printk(", rootpath=%s", root_server_path);
 	printk("\n");
 #endif /* !SILENT */
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 29609d2..5079dfb 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -130,8 +130,8 @@ struct ipip_net {
 	struct net_device *fb_tunnel_dev;
 };
 
-static int ipip_fb_tunnel_init(struct net_device *dev);
-static int ipip_tunnel_init(struct net_device *dev);
+static void ipip_fb_tunnel_init(struct net_device *dev);
+static void ipip_tunnel_init(struct net_device *dev);
 static void ipip_tunnel_setup(struct net_device *dev);
 
 static DEFINE_RWLOCK(ipip_lock);
@@ -245,9 +245,10 @@ static struct ip_tunnel * ipip_tunnel_locate(struct net *net,
 	}
 
 	nt = netdev_priv(dev);
-	dev->init = ipip_tunnel_init;
 	nt->parms = *parms;
 
+	ipip_tunnel_init(dev);
+
 	if (register_netdevice(dev) < 0)
 		goto failed_free;
 
@@ -281,7 +282,7 @@ static int ipip_err(struct sk_buff *skb, u32 info)
    8 bytes of packet payload. It means, that precise relaying of
    ICMP in the real Internet is absolutely infeasible.
  */
-	struct iphdr *iph = (struct iphdr*)skb->data;
+	struct iphdr *iph = (struct iphdr *)skb->data;
 	const int type = icmp_hdr(skb)->type;
 	const int code = icmp_hdr(skb)->code;
 	struct ip_tunnel *t;
@@ -691,12 +692,17 @@ static int ipip_tunnel_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
+static const struct net_device_ops ipip_netdev_ops = {
+	.ndo_uninit	= ipip_tunnel_uninit,
+	.ndo_start_xmit	= ipip_tunnel_xmit,
+	.ndo_do_ioctl	= ipip_tunnel_ioctl,
+	.ndo_change_mtu	= ipip_tunnel_change_mtu,
+
+};
+
 static void ipip_tunnel_setup(struct net_device *dev)
 {
-	dev->uninit		= ipip_tunnel_uninit;
-	dev->hard_start_xmit	= ipip_tunnel_xmit;
-	dev->do_ioctl		= ipip_tunnel_ioctl;
-	dev->change_mtu		= ipip_tunnel_change_mtu;
+	dev->netdev_ops		= &ipip_netdev_ops;
 	dev->destructor		= free_netdev;
 
 	dev->type		= ARPHRD_TUNNEL;
@@ -708,11 +714,9 @@ static void ipip_tunnel_setup(struct net_device *dev)
 	dev->features		|= NETIF_F_NETNS_LOCAL;
 }
 
-static int ipip_tunnel_init(struct net_device *dev)
+static void ipip_tunnel_init(struct net_device *dev)
 {
-	struct ip_tunnel *tunnel;
-
-	tunnel = netdev_priv(dev);
+	struct ip_tunnel *tunnel = netdev_priv(dev);
 
 	tunnel->dev = dev;
 	strcpy(tunnel->parms.name, dev->name);
@@ -721,11 +725,9 @@ static int ipip_tunnel_init(struct net_device *dev)
 	memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);
 
 	ipip_tunnel_bind_dev(dev);
-
-	return 0;
 }
 
-static int ipip_fb_tunnel_init(struct net_device *dev)
+static void ipip_fb_tunnel_init(struct net_device *dev)
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
 	struct iphdr *iph = &tunnel->parms.iph;
@@ -740,7 +742,6 @@ static int ipip_fb_tunnel_init(struct net_device *dev)
 
 	dev_hold(dev);
 	ipn->tunnels_wc[0]	= tunnel;
-	return 0;
 }
 
 static struct xfrm_tunnel ipip_handler = {
@@ -792,10 +793,10 @@ static int ipip_init_net(struct net *net)
 		err = -ENOMEM;
 		goto err_alloc_dev;
 	}
-
-	ipn->fb_tunnel_dev->init = ipip_fb_tunnel_init;
 	dev_net_set(ipn->fb_tunnel_dev, net);
 
+	ipip_fb_tunnel_init(ipn->fb_tunnel_dev);
+
 	if ((err = register_netdev(ipn->fb_tunnel_dev)))
 		goto err_reg_dev;
 
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 25924b1..1466644 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -124,8 +124,8 @@ static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v)
 
 	dev = __dev_get_by_name(&init_net, "tunl0");
 	if (dev) {
+		const struct net_device_ops *ops = dev->netdev_ops;
 		struct ifreq ifr;
-		mm_segment_t	oldfs;
 		struct ip_tunnel_parm p;
 
 		memset(&p, 0, sizeof(p));
@@ -137,9 +137,13 @@ static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v)
 		sprintf(p.name, "dvmrp%d", v->vifc_vifi);
 		ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
 
-		oldfs = get_fs(); set_fs(KERNEL_DS);
-		dev->do_ioctl(dev, &ifr, SIOCDELTUNNEL);
-		set_fs(oldfs);
+		if (ops->ndo_do_ioctl) {
+			mm_segment_t oldfs = get_fs();
+
+			set_fs(KERNEL_DS);
+			ops->ndo_do_ioctl(dev, &ifr, SIOCDELTUNNEL);
+			set_fs(oldfs);
+		}
 	}
 }
 
@@ -151,9 +155,9 @@ struct net_device *ipmr_new_tunnel(struct vifctl *v)
 	dev = __dev_get_by_name(&init_net, "tunl0");
 
 	if (dev) {
+		const struct net_device_ops *ops = dev->netdev_ops;
 		int err;
 		struct ifreq ifr;
-		mm_segment_t	oldfs;
 		struct ip_tunnel_parm p;
 		struct in_device  *in_dev;
 
@@ -166,9 +170,14 @@ struct net_device *ipmr_new_tunnel(struct vifctl *v)
 		sprintf(p.name, "dvmrp%d", v->vifc_vifi);
 		ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
 
-		oldfs = get_fs(); set_fs(KERNEL_DS);
-		err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
-		set_fs(oldfs);
+		if (ops->ndo_do_ioctl) {
+			mm_segment_t oldfs = get_fs();
+
+			set_fs(KERNEL_DS);
+			err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
+			set_fs(oldfs);
+		} else
+			err = -EOPNOTSUPP;
 
 		dev = NULL;
 
@@ -213,12 +222,16 @@ static int reg_vif_xmit(struct sk_buff *skb, struct net_device *dev)
 	return 0;
 }
 
+static const struct net_device_ops reg_vif_netdev_ops = {
+	.ndo_start_xmit	= reg_vif_xmit,
+};
+
 static void reg_vif_setup(struct net_device *dev)
 {
 	dev->type		= ARPHRD_PIMREG;
 	dev->mtu		= ETH_DATA_LEN - sizeof(struct iphdr) - 8;
 	dev->flags		= IFF_NOARP;
-	dev->hard_start_xmit	= reg_vif_xmit;
+	dev->netdev_ops		= &reg_vif_netdev_ops,
 	dev->destructor		= free_netdev;
 }
 
@@ -331,7 +344,7 @@ static void ipmr_destroy_unres(struct mfc_cache *c)
 
 	atomic_dec(&cache_resolve_queue_len);
 
-	while ((skb=skb_dequeue(&c->mfc_un.unres.unresolved))) {
+	while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved))) {
 		if (ip_hdr(skb)->version == 0) {
 			struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr));
 			nlh->nlmsg_type = NLMSG_ERROR;
@@ -477,13 +490,13 @@ static int vif_add(struct vifctl *vifc, int mrtsock)
 	/*
 	 *	Fill in the VIF structures
 	 */
-	v->rate_limit=vifc->vifc_rate_limit;
-	v->local=vifc->vifc_lcl_addr.s_addr;
-	v->remote=vifc->vifc_rmt_addr.s_addr;
-	v->flags=vifc->vifc_flags;
+	v->rate_limit = vifc->vifc_rate_limit;
+	v->local = vifc->vifc_lcl_addr.s_addr;
+	v->remote = vifc->vifc_rmt_addr.s_addr;
+	v->flags = vifc->vifc_flags;
 	if (!mrtsock)
 		v->flags |= VIFF_STATIC;
-	v->threshold=vifc->vifc_threshold;
+	v->threshold = vifc->vifc_threshold;
 	v->bytes_in = 0;
 	v->bytes_out = 0;
 	v->pkt_in = 0;
@@ -494,7 +507,7 @@ static int vif_add(struct vifctl *vifc, int mrtsock)
 
 	/* And finish update writing critical data */
 	write_lock_bh(&mrt_lock);
-	v->dev=dev;
+	v->dev = dev;
 #ifdef CONFIG_IP_PIMSM
 	if (v->flags&VIFF_REGISTER)
 		reg_vif_num = vifi;
@@ -507,7 +520,7 @@ static int vif_add(struct vifctl *vifc, int mrtsock)
 
 static struct mfc_cache *ipmr_cache_find(__be32 origin, __be32 mcastgrp)
 {
-	int line=MFC_HASH(mcastgrp,origin);
+	int line = MFC_HASH(mcastgrp, origin);
 	struct mfc_cache *c;
 
 	for (c=mfc_cache_array[line]; c; c = c->next) {
@@ -522,8 +535,8 @@ static struct mfc_cache *ipmr_cache_find(__be32 origin, __be32 mcastgrp)
  */
 static struct mfc_cache *ipmr_cache_alloc(void)
 {
-	struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
-	if (c==NULL)
+	struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
+	if (c == NULL)
 		return NULL;
 	c->mfc_un.res.minvif = MAXVIFS;
 	return c;
@@ -531,8 +544,8 @@ static struct mfc_cache *ipmr_cache_alloc(void)
 
 static struct mfc_cache *ipmr_cache_alloc_unres(void)
 {
-	struct mfc_cache *c=kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC);
-	if (c==NULL)
+	struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC);
+	if (c == NULL)
 		return NULL;
 	skb_queue_head_init(&c->mfc_un.unres.unresolved);
 	c->mfc_un.unres.expires = jiffies + 10*HZ;
@@ -552,7 +565,7 @@ static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c)
 	 *	Play the pending entries through our router
 	 */
 
-	while ((skb=__skb_dequeue(&uc->mfc_un.unres.unresolved))) {
+	while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) {
 		if (ip_hdr(skb)->version == 0) {
 			struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr));
 
@@ -637,7 +650,7 @@ static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert)
 	 *	Add our header
 	 */
 
-	igmp=(struct igmphdr *)skb_put(skb,sizeof(struct igmphdr));
+	igmp=(struct igmphdr *)skb_put(skb, sizeof(struct igmphdr));
 	igmp->type	=
 	msg->im_msgtype = assert;
 	igmp->code 	=	0;
@@ -653,7 +666,7 @@ static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert)
 	/*
 	 *	Deliver to mrouted
 	 */
-	if ((ret=sock_queue_rcv_skb(mroute_socket,skb))<0) {
+	if ((ret = sock_queue_rcv_skb(mroute_socket, skb))<0) {
 		if (net_ratelimit())
 			printk(KERN_WARNING "mroute: pending queue full, dropping entries.\n");
 		kfree_skb(skb);
@@ -685,7 +698,7 @@ ipmr_cache_unresolved(vifi_t vifi, struct sk_buff *skb)
 		 *	Create a new entry if allowable
 		 */
 
-		if (atomic_read(&cache_resolve_queue_len)>=10 ||
+		if (atomic_read(&cache_resolve_queue_len) >= 10 ||
 		    (c=ipmr_cache_alloc_unres())==NULL) {
 			spin_unlock_bh(&mfc_unres_lock);
 
@@ -728,7 +741,7 @@ ipmr_cache_unresolved(vifi_t vifi, struct sk_buff *skb)
 		kfree_skb(skb);
 		err = -ENOBUFS;
 	} else {
-		skb_queue_tail(&c->mfc_un.unres.unresolved,skb);
+		skb_queue_tail(&c->mfc_un.unres.unresolved, skb);
 		err = 0;
 	}
 
@@ -745,7 +758,7 @@ static int ipmr_mfc_delete(struct mfcctl *mfc)
 	int line;
 	struct mfc_cache *c, **cp;
 
-	line=MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr);
+	line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr);
 
 	for (cp=&mfc_cache_array[line]; (c=*cp) != NULL; cp = &c->next) {
 		if (c->mfc_origin == mfc->mfcc_origin.s_addr &&
@@ -766,7 +779,7 @@ static int ipmr_mfc_add(struct mfcctl *mfc, int mrtsock)
 	int line;
 	struct mfc_cache *uc, *c, **cp;
 
-	line=MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr);
+	line = MFC_HASH(mfc->mfcc_mcastgrp.s_addr, mfc->mfcc_origin.s_addr);
 
 	for (cp=&mfc_cache_array[line]; (c=*cp) != NULL; cp = &c->next) {
 		if (c->mfc_origin == mfc->mfcc_origin.s_addr &&
@@ -787,13 +800,13 @@ static int ipmr_mfc_add(struct mfcctl *mfc, int mrtsock)
 	if (!ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr))
 		return -EINVAL;
 
-	c=ipmr_cache_alloc();
-	if (c==NULL)
+	c = ipmr_cache_alloc();
+	if (c == NULL)
 		return -ENOMEM;
 
-	c->mfc_origin=mfc->mfcc_origin.s_addr;
-	c->mfc_mcastgrp=mfc->mfcc_mcastgrp.s_addr;
-	c->mfc_parent=mfc->mfcc_parent;
+	c->mfc_origin = mfc->mfcc_origin.s_addr;
+	c->mfc_mcastgrp = mfc->mfcc_mcastgrp.s_addr;
+	c->mfc_parent = mfc->mfcc_parent;
 	ipmr_update_thresholds(c, mfc->mfcc_ttls);
 	if (!mrtsock)
 		c->mfc_flags |= MFC_STATIC;
@@ -846,7 +859,7 @@ static void mroute_clean_tables(struct sock *sk)
 	/*
 	 *	Wipe the cache
 	 */
-	for (i=0;i<MFC_LINES;i++) {
+	for (i=0; i<MFC_LINES; i++) {
 		struct mfc_cache *c, **cp;
 
 		cp = &mfc_cache_array[i];
@@ -887,7 +900,7 @@ static void mrtsock_destruct(struct sock *sk)
 		IPV4_DEVCONF_ALL(sock_net(sk), MC_FORWARDING)--;
 
 		write_lock_bh(&mrt_lock);
-		mroute_socket=NULL;
+		mroute_socket = NULL;
 		write_unlock_bh(&mrt_lock);
 
 		mroute_clean_tables(sk);
@@ -902,7 +915,7 @@ static void mrtsock_destruct(struct sock *sk)
  *	MOSPF/PIM router set up we can clean this up.
  */
 
-int ip_mroute_setsockopt(struct sock *sk,int optname,char __user *optval,int optlen)
+int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int optlen)
 {
 	int ret;
 	struct vifctl vif;
@@ -918,7 +931,7 @@ int ip_mroute_setsockopt(struct sock *sk,int optname,char __user *optval,int opt
 		if (sk->sk_type != SOCK_RAW ||
 		    inet_sk(sk)->num != IPPROTO_IGMP)
 			return -EOPNOTSUPP;
-		if (optlen!=sizeof(int))
+		if (optlen != sizeof(int))
 			return -ENOPROTOOPT;
 
 		rtnl_lock();
@@ -930,7 +943,7 @@ int ip_mroute_setsockopt(struct sock *sk,int optname,char __user *optval,int opt
 		ret = ip_ra_control(sk, 1, mrtsock_destruct);
 		if (ret == 0) {
 			write_lock_bh(&mrt_lock);
-			mroute_socket=sk;
+			mroute_socket = sk;
 			write_unlock_bh(&mrt_lock);
 
 			IPV4_DEVCONF_ALL(sock_net(sk), MC_FORWARDING)++;
@@ -938,19 +951,19 @@ int ip_mroute_setsockopt(struct sock *sk,int optname,char __user *optval,int opt
 		rtnl_unlock();
 		return ret;
 	case MRT_DONE:
-		if (sk!=mroute_socket)
+		if (sk != mroute_socket)
 			return -EACCES;
 		return ip_ra_control(sk, 0, NULL);
 	case MRT_ADD_VIF:
 	case MRT_DEL_VIF:
-		if (optlen!=sizeof(vif))
+		if (optlen != sizeof(vif))
 			return -EINVAL;
-		if (copy_from_user(&vif,optval,sizeof(vif)))
+		if (copy_from_user(&vif, optval, sizeof(vif)))
 			return -EFAULT;
 		if (vif.vifc_vifi >= MAXVIFS)
 			return -ENFILE;
 		rtnl_lock();
-		if (optname==MRT_ADD_VIF) {
+		if (optname == MRT_ADD_VIF) {
 			ret = vif_add(&vif, sk==mroute_socket);
 		} else {
 			ret = vif_delete(vif.vifc_vifi, 0);
@@ -964,12 +977,12 @@ int ip_mroute_setsockopt(struct sock *sk,int optname,char __user *optval,int opt
 		 */
 	case MRT_ADD_MFC:
 	case MRT_DEL_MFC:
-		if (optlen!=sizeof(mfc))
+		if (optlen != sizeof(mfc))
 			return -EINVAL;
-		if (copy_from_user(&mfc,optval, sizeof(mfc)))
+		if (copy_from_user(&mfc, optval, sizeof(mfc)))
 			return -EFAULT;
 		rtnl_lock();
-		if (optname==MRT_DEL_MFC)
+		if (optname == MRT_DEL_MFC)
 			ret = ipmr_mfc_delete(&mfc);
 		else
 			ret = ipmr_mfc_add(&mfc, sk==mroute_socket);
@@ -1028,12 +1041,12 @@ int ip_mroute_setsockopt(struct sock *sk,int optname,char __user *optval,int opt
  *	Getsock opt support for the multicast routing system.
  */
 
-int ip_mroute_getsockopt(struct sock *sk,int optname,char __user *optval,int __user *optlen)
+int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen)
 {
 	int olr;
 	int val;
 
-	if (optname!=MRT_VERSION &&
+	if (optname != MRT_VERSION &&
 #ifdef CONFIG_IP_PIMSM
 	   optname!=MRT_PIM &&
 #endif
@@ -1047,17 +1060,17 @@ int ip_mroute_getsockopt(struct sock *sk,int optname,char __user *optval,int __u
 	if (olr < 0)
 		return -EINVAL;
 
-	if (put_user(olr,optlen))
+	if (put_user(olr, optlen))
 		return -EFAULT;
-	if (optname==MRT_VERSION)
-		val=0x0305;
+	if (optname == MRT_VERSION)
+		val = 0x0305;
 #ifdef CONFIG_IP_PIMSM
-	else if (optname==MRT_PIM)
-		val=mroute_do_pim;
+	else if (optname == MRT_PIM)
+		val = mroute_do_pim;
 #endif
 	else
-		val=mroute_do_assert;
-	if (copy_to_user(optval,&val,olr))
+		val = mroute_do_assert;
+	if (copy_to_user(optval, &val, olr))
 		return -EFAULT;
 	return 0;
 }
@@ -1075,27 +1088,27 @@ int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
 
 	switch (cmd) {
 	case SIOCGETVIFCNT:
-		if (copy_from_user(&vr,arg,sizeof(vr)))
+		if (copy_from_user(&vr, arg, sizeof(vr)))
 			return -EFAULT;
-		if (vr.vifi>=maxvif)
+		if (vr.vifi >= maxvif)
 			return -EINVAL;
 		read_lock(&mrt_lock);
 		vif=&vif_table[vr.vifi];
 		if (VIF_EXISTS(vr.vifi))	{
-			vr.icount=vif->pkt_in;
-			vr.ocount=vif->pkt_out;
-			vr.ibytes=vif->bytes_in;
-			vr.obytes=vif->bytes_out;
+			vr.icount = vif->pkt_in;
+			vr.ocount = vif->pkt_out;
+			vr.ibytes = vif->bytes_in;
+			vr.obytes = vif->bytes_out;
 			read_unlock(&mrt_lock);
 
-			if (copy_to_user(arg,&vr,sizeof(vr)))
+			if (copy_to_user(arg, &vr, sizeof(vr)))
 				return -EFAULT;
 			return 0;
 		}
 		read_unlock(&mrt_lock);
 		return -EADDRNOTAVAIL;
 	case SIOCGETSGCNT:
-		if (copy_from_user(&sr,arg,sizeof(sr)))
+		if (copy_from_user(&sr, arg, sizeof(sr)))
 			return -EFAULT;
 
 		read_lock(&mrt_lock);
@@ -1106,7 +1119,7 @@ int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
 			sr.wrong_if = c->mfc_un.res.wrong_if;
 			read_unlock(&mrt_lock);
 
-			if (copy_to_user(arg,&sr,sizeof(sr)))
+			if (copy_to_user(arg, &sr, sizeof(sr)))
 				return -EFAULT;
 			return 0;
 		}
@@ -1130,15 +1143,15 @@ static int ipmr_device_event(struct notifier_block *this, unsigned long event, v
 	if (event != NETDEV_UNREGISTER)
 		return NOTIFY_DONE;
 	v=&vif_table[0];
-	for (ct=0;ct<maxvif;ct++,v++) {
-		if (v->dev==dev)
+	for (ct=0; ct<maxvif; ct++,v++) {
+		if (v->dev == dev)
 			vif_delete(ct, 1);
 	}
 	return NOTIFY_DONE;
 }
 
 
-static struct notifier_block ip_mr_notifier={
+static struct notifier_block ip_mr_notifier = {
 	.notifier_call = ipmr_device_event,
 };
 
@@ -1204,7 +1217,7 @@ static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi)
 #ifdef CONFIG_IP_PIMSM
 	if (vif->flags & VIFF_REGISTER) {
 		vif->pkt_out++;
-		vif->bytes_out+=skb->len;
+		vif->bytes_out += skb->len;
 		vif->dev->stats.tx_bytes += skb->len;
 		vif->dev->stats.tx_packets++;
 		ipmr_cache_report(skb, vifi, IGMPMSG_WHOLEPKT);
@@ -1254,7 +1267,7 @@ static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi)
 	}
 
 	vif->pkt_out++;
-	vif->bytes_out+=skb->len;
+	vif->bytes_out += skb->len;
 
 	dst_release(skb->dst);
 	skb->dst = &rt->u.dst;
@@ -1352,7 +1365,7 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local
 	}
 
 	vif_table[vif].pkt_in++;
-	vif_table[vif].bytes_in+=skb->len;
+	vif_table[vif].bytes_in += skb->len;
 
 	/*
 	 *	Forward the frame
@@ -1364,7 +1377,7 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local
 				if (skb2)
 					ipmr_queue_xmit(skb2, cache, psend);
 			}
-			psend=ct;
+			psend = ct;
 		}
 	}
 	if (psend != -1) {
@@ -1428,7 +1441,7 @@ int ip_mr_input(struct sk_buff *skb)
 	/*
 	 *	No usable cache entry
 	 */
-	if (cache==NULL) {
+	if (cache == NULL) {
 		int vif;
 
 		if (local) {
@@ -1469,29 +1482,13 @@ dont_forward:
 	return 0;
 }
 
-#ifdef CONFIG_IP_PIMSM_V1
-/*
- * Handle IGMP messages of PIMv1
- */
-
-int pim_rcv_v1(struct sk_buff * skb)
+#ifdef CONFIG_IP_PIMSM
+static int __pim_rcv(struct sk_buff *skb, unsigned int pimlen)
 {
-	struct igmphdr *pim;
-	struct iphdr   *encap;
-	struct net_device  *reg_dev = NULL;
-
-	if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap)))
-		goto drop;
+	struct net_device *reg_dev = NULL;
+	struct iphdr *encap;
 
-	pim = igmp_hdr(skb);
-
-	if (!mroute_do_pim ||
-	    skb->len < sizeof(*pim) + sizeof(*encap) ||
-	    pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER)
-		goto drop;
-
-	encap = (struct iphdr *)(skb_transport_header(skb) +
-				 sizeof(struct igmphdr));
+	encap = (struct iphdr *)(skb_transport_header(skb) + pimlen);
 	/*
 	   Check that:
 	   a. packet is really destinted to a multicast group
@@ -1500,8 +1497,8 @@ int pim_rcv_v1(struct sk_buff * skb)
 	 */
 	if (!ipv4_is_multicast(encap->daddr) ||
 	    encap->tot_len == 0 ||
-	    ntohs(encap->tot_len) + sizeof(*pim) > skb->len)
-		goto drop;
+	    ntohs(encap->tot_len) + pimlen > skb->len)
+		return 1;
 
 	read_lock(&mrt_lock);
 	if (reg_vif_num >= 0)
@@ -1511,7 +1508,7 @@ int pim_rcv_v1(struct sk_buff * skb)
 	read_unlock(&mrt_lock);
 
 	if (reg_dev == NULL)
-		goto drop;
+		return 1;
 
 	skb->mac_header = skb->network_header;
 	skb_pull(skb, (u8*)encap - skb->data);
@@ -1527,9 +1524,33 @@ int pim_rcv_v1(struct sk_buff * skb)
 	nf_reset(skb);
 	netif_rx(skb);
 	dev_put(reg_dev);
+
 	return 0;
- drop:
-	kfree_skb(skb);
+}
+#endif
+
+#ifdef CONFIG_IP_PIMSM_V1
+/*
+ * Handle IGMP messages of PIMv1
+ */
+
+int pim_rcv_v1(struct sk_buff * skb)
+{
+	struct igmphdr *pim;
+
+	if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr)))
+		goto drop;
+
+	pim = igmp_hdr(skb);
+
+	if (!mroute_do_pim ||
+	    pim->group != PIM_V1_VERSION || pim->code != PIM_V1_REGISTER)
+		goto drop;
+
+	if (__pim_rcv(skb, sizeof(*pim))) {
+drop:
+		kfree_skb(skb);
+	}
 	return 0;
 }
 #endif
@@ -1538,10 +1559,8 @@ int pim_rcv_v1(struct sk_buff * skb)
 static int pim_rcv(struct sk_buff * skb)
 {
 	struct pimreghdr *pim;
-	struct iphdr   *encap;
-	struct net_device  *reg_dev = NULL;
 
-	if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap)))
+	if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(struct iphdr)))
 		goto drop;
 
 	pim = (struct pimreghdr *)skb_transport_header(skb);
@@ -1551,41 +1570,10 @@ static int pim_rcv(struct sk_buff * skb)
 	     csum_fold(skb_checksum(skb, 0, skb->len, 0))))
 		goto drop;
 
-	/* check if the inner packet is destined to mcast group */
-	encap = (struct iphdr *)(skb_transport_header(skb) +
-				 sizeof(struct pimreghdr));
-	if (!ipv4_is_multicast(encap->daddr) ||
-	    encap->tot_len == 0 ||
-	    ntohs(encap->tot_len) + sizeof(*pim) > skb->len)
-		goto drop;
-
-	read_lock(&mrt_lock);
-	if (reg_vif_num >= 0)
-		reg_dev = vif_table[reg_vif_num].dev;
-	if (reg_dev)
-		dev_hold(reg_dev);
-	read_unlock(&mrt_lock);
-
-	if (reg_dev == NULL)
-		goto drop;
-
-	skb->mac_header = skb->network_header;
-	skb_pull(skb, (u8*)encap - skb->data);
-	skb_reset_network_header(skb);
-	skb->dev = reg_dev;
-	skb->protocol = htons(ETH_P_IP);
-	skb->ip_summed = 0;
-	skb->pkt_type = PACKET_HOST;
-	dst_release(skb->dst);
-	reg_dev->stats.rx_bytes += skb->len;
-	reg_dev->stats.rx_packets++;
-	skb->dst = NULL;
-	nf_reset(skb);
-	netif_rx(skb);
-	dev_put(reg_dev);
-	return 0;
- drop:
-	kfree_skb(skb);
+	if (__pim_rcv(skb, sizeof(*pim))) {
+drop:
+		kfree_skb(skb);
+	}
 	return 0;
 }
 #endif
@@ -1602,13 +1590,13 @@ ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm)
 	if (dev)
 		RTA_PUT(skb, RTA_IIF, 4, &dev->ifindex);
 
-	mp_head = (struct rtattr*)skb_put(skb, RTA_LENGTH(0));
+	mp_head = (struct rtattr *)skb_put(skb, RTA_LENGTH(0));
 
 	for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) {
 		if (c->mfc_un.res.ttls[ct] < 255) {
 			if (skb_tailroom(skb) < RTA_ALIGN(RTA_ALIGN(sizeof(*nhp)) + 4))
 				goto rtattr_failure;
-			nhp = (struct rtnexthop*)skb_put(skb, RTA_ALIGN(sizeof(*nhp)));
+			nhp = (struct rtnexthop *)skb_put(skb, RTA_ALIGN(sizeof(*nhp)));
 			nhp->rtnh_flags = 0;
 			nhp->rtnh_hops = c->mfc_un.res.ttls[ct];
 			nhp->rtnh_ifindex = vif_table[ct].dev->ifindex;
@@ -1634,7 +1622,7 @@ int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait)
 	read_lock(&mrt_lock);
 	cache = ipmr_cache_find(rt->rt_src, rt->rt_dst);
 
-	if (cache==NULL) {
+	if (cache == NULL) {
 		struct sk_buff *skb2;
 		struct iphdr *iph;
 		struct net_device *dev;
@@ -1866,15 +1854,16 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
 		const struct mfc_cache *mfc = v;
 		const struct ipmr_mfc_iter *it = seq->private;
 
-		seq_printf(seq, "%08lX %08lX %-3d %8ld %8ld %8ld",
+		seq_printf(seq, "%08lX %08lX %-3hd",
 			   (unsigned long) mfc->mfc_mcastgrp,
 			   (unsigned long) mfc->mfc_origin,
-			   mfc->mfc_parent,
-			   mfc->mfc_un.res.pkt,
-			   mfc->mfc_un.res.bytes,
-			   mfc->mfc_un.res.wrong_if);
+			   mfc->mfc_parent);
 
 		if (it->cache != &mfc_unres_queue) {
+			seq_printf(seq, " %8lu %8lu %8lu",
+				   mfc->mfc_un.res.pkt,
+				   mfc->mfc_un.res.bytes,
+				   mfc->mfc_un.res.wrong_if);
 			for (n = mfc->mfc_un.res.minvif;
 			     n < mfc->mfc_un.res.maxvif; n++ ) {
 				if (VIF_EXISTS(n)
@@ -1883,6 +1872,11 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
 					   " %2d:%-3d",
 					   n, mfc->mfc_un.res.ttls[n]);
 			}
+		} else {
+			/* unresolved mfc_caches don't contain
+			 * pkt, bytes and wrong_if values
+			 */
+			seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul);
 		}
 		seq_putc(seq, '\n');
 	}
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index 6efdb70..fdf6811 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -66,7 +66,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
 #ifdef CONFIG_XFRM
 	if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
 	    xfrm_decode_session(skb, &fl, AF_INET) == 0)
-		if (xfrm_lookup(&skb->dst, &fl, skb->sk, 0))
+		if (xfrm_lookup(net, &skb->dst, &fl, skb->sk, 0))
 			return -1;
 #endif
 
@@ -97,7 +97,7 @@ int ip_xfrm_me_harder(struct sk_buff *skb)
 		dst = ((struct xfrm_dst *)dst)->route;
 	dst_hold(dst);
 
-	if (xfrm_lookup(&dst, &fl, skb->sk, 0) < 0)
+	if (xfrm_lookup(dev_net(dst->dev), &dst, &fl, skb->sk, 0) < 0)
 		return -1;
 
 	dst_release(skb->dst);
@@ -125,6 +125,7 @@ struct ip_rt_info {
 	__be32 daddr;
 	__be32 saddr;
 	u_int8_t tos;
+	u_int32_t mark;
 };
 
 static void nf_ip_saveroute(const struct sk_buff *skb,
@@ -138,6 +139,7 @@ static void nf_ip_saveroute(const struct sk_buff *skb,
 		rt_info->tos = iph->tos;
 		rt_info->daddr = iph->daddr;
 		rt_info->saddr = iph->saddr;
+		rt_info->mark = skb->mark;
 	}
 }
 
@@ -150,6 +152,7 @@ static int nf_ip_reroute(struct sk_buff *skb,
 		const struct iphdr *iph = ip_hdr(skb);
 
 		if (!(iph->tos == rt_info->tos
+		      && skb->mark == rt_info->mark
 		      && iph->daddr == rt_info->daddr
 		      && iph->saddr == rt_info->saddr))
 			return ip_route_me_harder(skb, RTN_UNSPEC);
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 8d70d29..7ea88b6 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -142,15 +142,15 @@ static inline int arp_packet_match(const struct arphdr *arphdr,
 		  ARPT_INV_TGTIP)) {
 		dprintf("Source or target IP address mismatch.\n");
 
-		dprintf("SRC: %u.%u.%u.%u. Mask: %u.%u.%u.%u. Target: %u.%u.%u.%u.%s\n",
-			NIPQUAD(src_ipaddr),
-			NIPQUAD(arpinfo->smsk.s_addr),
-			NIPQUAD(arpinfo->src.s_addr),
+		dprintf("SRC: %pI4. Mask: %pI4. Target: %pI4.%s\n",
+			&src_ipaddr,
+			&arpinfo->smsk.s_addr,
+			&arpinfo->src.s_addr,
 			arpinfo->invflags & ARPT_INV_SRCIP ? " (INV)" : "");
-		dprintf("TGT: %u.%u.%u.%u Mask: %u.%u.%u.%u Target: %u.%u.%u.%u.%s\n",
-			NIPQUAD(tgt_ipaddr),
-			NIPQUAD(arpinfo->tmsk.s_addr),
-			NIPQUAD(arpinfo->tgt.s_addr),
+		dprintf("TGT: %pI4 Mask: %pI4 Target: %pI4.%s\n",
+			&tgt_ipaddr,
+			&arpinfo->tmsk.s_addr,
+			&arpinfo->tgt.s_addr,
 			arpinfo->invflags & ARPT_INV_TGTIP ? " (INV)" : "");
 		return 0;
 	}
diff --git a/net/ipv4/netfilter/arptable_filter.c b/net/ipv4/netfilter/arptable_filter.c
index bee3d11..e091187 100644
--- a/net/ipv4/netfilter/arptable_filter.c
+++ b/net/ipv4/netfilter/arptable_filter.c
@@ -75,16 +75,6 @@ static unsigned int arpt_out_hook(unsigned int hook,
 			     dev_net(out)->ipv4.arptable_filter);
 }
 
-static unsigned int arpt_forward_hook(unsigned int hook,
-				      struct sk_buff *skb,
-				      const struct net_device *in,
-				      const struct net_device *out,
-				      int (*okfn)(struct sk_buff *))
-{
-	return arpt_do_table(skb, hook, in, out,
-			     dev_net(in)->ipv4.arptable_filter);
-}
-
 static struct nf_hook_ops arpt_ops[] __read_mostly = {
 	{
 		.hook		= arpt_in_hook,
@@ -101,7 +91,7 @@ static struct nf_hook_ops arpt_ops[] __read_mostly = {
 		.priority	= NF_IP_PRI_FILTER,
 	},
 	{
-		.hook		= arpt_forward_hook,
+		.hook		= arpt_in_hook,
 		.owner		= THIS_MODULE,
 		.pf		= NFPROTO_ARP,
 		.hooknum	= NF_ARP_FORWARD,
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 213fb27..ef8b6ca 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -94,15 +94,11 @@ ip_packet_match(const struct iphdr *ip,
 		     IPT_INV_DSTIP)) {
 		dprintf("Source or dest mismatch.\n");
 
-		dprintf("SRC: %u.%u.%u.%u. Mask: %u.%u.%u.%u. Target: %u.%u.%u.%u.%s\n",
-			NIPQUAD(ip->saddr),
-			NIPQUAD(ipinfo->smsk.s_addr),
-			NIPQUAD(ipinfo->src.s_addr),
+		dprintf("SRC: %pI4. Mask: %pI4. Target: %pI4.%s\n",
+			&ip->saddr, &ipinfo->smsk.s_addr, &ipinfo->src.s_addr,
 			ipinfo->invflags & IPT_INV_SRCIP ? " (INV)" : "");
-		dprintf("DST: %u.%u.%u.%u Mask: %u.%u.%u.%u Target: %u.%u.%u.%u.%s\n",
-			NIPQUAD(ip->daddr),
-			NIPQUAD(ipinfo->dmsk.s_addr),
-			NIPQUAD(ipinfo->dst.s_addr),
+		dprintf("DST: %pI4 Mask: %pI4 Target: %pI4.%s\n",
+			&ip->daddr, &ipinfo->dmsk.s_addr, &ipinfo->dst.s_addr,
 			ipinfo->invflags & IPT_INV_DSTIP ? " (INV)" : "");
 		return false;
 	}
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index 7ac1677..2e4f98b 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -168,7 +168,7 @@ clusterip_config_init(const struct ipt_clusterip_tgt_info *i, __be32 ip,
 		char buffer[16];
 
 		/* create proc dir entry */
-		sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(ip));
+		sprintf(buffer, "%pI4", &ip);
 		c->pde = proc_create_data(buffer, S_IWUSR|S_IRUSR,
 					  clusterip_procdir,
 					  &clusterip_proc_fops, c);
@@ -373,7 +373,7 @@ static bool clusterip_tg_check(const struct xt_tgchk_param *par)
 	config = clusterip_config_find_get(e->ip.dst.s_addr, 1);
 	if (!config) {
 		if (!(cipinfo->flags & CLUSTERIP_FLAG_NEW)) {
-			printk(KERN_WARNING "CLUSTERIP: no config found for %u.%u.%u.%u, need 'new'\n", NIPQUAD(e->ip.dst.s_addr));
+			printk(KERN_WARNING "CLUSTERIP: no config found for %pI4, need 'new'\n", &e->ip.dst.s_addr);
 			return false;
 		} else {
 			struct net_device *dev;
@@ -478,9 +478,8 @@ static void arp_print(struct arp_payload *payload)
 	}
 	hbuffer[--k]='\0';
 
-	printk("src %u.%u.%u.%u@%s, dst %u.%u.%u.%u\n",
-		NIPQUAD(payload->src_ip), hbuffer,
-		NIPQUAD(payload->dst_ip));
+	printk("src %pI4@%s, dst %pI4\n",
+		&payload->src_ip, hbuffer, &payload->dst_ip);
 }
 #endif
 
diff --git a/net/ipv4/netfilter/ipt_LOG.c b/net/ipv4/netfilter/ipt_LOG.c
index 7b5dbe1..27a78fb 100644
--- a/net/ipv4/netfilter/ipt_LOG.c
+++ b/net/ipv4/netfilter/ipt_LOG.c
@@ -54,8 +54,8 @@ static void dump_packet(const struct nf_loginfo *info,
 	/* Important fields:
 	 * TOS, len, DF/MF, fragment offset, TTL, src, dst, options. */
 	/* Max length: 40 "SRC=255.255.255.255 DST=255.255.255.255 " */
-	printk("SRC=%u.%u.%u.%u DST=%u.%u.%u.%u ",
-	       NIPQUAD(ih->saddr), NIPQUAD(ih->daddr));
+	printk("SRC=%pI4 DST=%pI4 ",
+	       &ih->saddr, &ih->daddr);
 
 	/* Max length: 46 "LEN=65535 TOS=0xFF PREC=0xFF TTL=255 ID=65535 " */
 	printk("LEN=%u TOS=0x%02X PREC=0x%02X TTL=%u ID=%u ",
@@ -262,8 +262,7 @@ static void dump_packet(const struct nf_loginfo *info,
 			break;
 		case ICMP_REDIRECT:
 			/* Max length: 24 "GATEWAY=255.255.255.255 " */
-			printk("GATEWAY=%u.%u.%u.%u ",
-			       NIPQUAD(ich->un.gateway));
+			printk("GATEWAY=%pI4 ", &ich->un.gateway);
 			/* Fall through */
 		case ICMP_DEST_UNREACH:
 		case ICMP_SOURCE_QUENCH:
diff --git a/net/ipv4/netfilter/ipt_addrtype.c b/net/ipv4/netfilter/ipt_addrtype.c
index 88762f0..3b216be 100644
--- a/net/ipv4/netfilter/ipt_addrtype.c
+++ b/net/ipv4/netfilter/ipt_addrtype.c
@@ -23,24 +23,25 @@ MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
 MODULE_DESCRIPTION("Xtables: address type match for IPv4");
 
-static inline bool match_type(const struct net_device *dev, __be32 addr,
-			      u_int16_t mask)
+static inline bool match_type(struct net *net, const struct net_device *dev,
+			      __be32 addr, u_int16_t mask)
 {
-	return !!(mask & (1 << inet_dev_addr_type(&init_net, dev, addr)));
+	return !!(mask & (1 << inet_dev_addr_type(net, dev, addr)));
 }
 
 static bool
 addrtype_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
 {
+	struct net *net = dev_net(par->in ? par->in : par->out);
 	const struct ipt_addrtype_info *info = par->matchinfo;
 	const struct iphdr *iph = ip_hdr(skb);
 	bool ret = true;
 
 	if (info->source)
-		ret &= match_type(NULL, iph->saddr, info->source) ^
+		ret &= match_type(net, NULL, iph->saddr, info->source) ^
 		       info->invert_source;
 	if (info->dest)
-		ret &= match_type(NULL, iph->daddr, info->dest) ^
+		ret &= match_type(net, NULL, iph->daddr, info->dest) ^
 		       info->invert_dest;
 
 	return ret;
@@ -49,6 +50,7 @@ addrtype_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
 static bool
 addrtype_mt_v1(const struct sk_buff *skb, const struct xt_match_param *par)
 {
+	struct net *net = dev_net(par->in ? par->in : par->out);
 	const struct ipt_addrtype_info_v1 *info = par->matchinfo;
 	const struct iphdr *iph = ip_hdr(skb);
 	const struct net_device *dev = NULL;
@@ -60,10 +62,10 @@ addrtype_mt_v1(const struct sk_buff *skb, const struct xt_match_param *par)
 		dev = par->out;
 
 	if (info->source)
-		ret &= match_type(dev, iph->saddr, info->source) ^
+		ret &= match_type(net, dev, iph->saddr, info->source) ^
 		       (info->flags & IPT_ADDRTYPE_INVERT_SOURCE);
 	if (ret && info->dest)
-		ret &= match_type(dev, iph->daddr, info->dest) ^
+		ret &= match_type(net, dev, iph->daddr, info->dest) ^
 		       !!(info->flags & IPT_ADDRTYPE_INVERT_DEST);
 	return ret;
 }
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index 4a7c352..b2141e1 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -60,9 +60,8 @@ static bool ipv4_invert_tuple(struct nf_conntrack_tuple *tuple,
 static int ipv4_print_tuple(struct seq_file *s,
 			    const struct nf_conntrack_tuple *tuple)
 {
-	return seq_printf(s, "src=%u.%u.%u.%u dst=%u.%u.%u.%u ",
-			  NIPQUAD(tuple->src.u3.ip),
-			  NIPQUAD(tuple->dst.u3.ip));
+	return seq_printf(s, "src=%pI4 dst=%pI4 ",
+			  &tuple->src.u3.ip, &tuple->dst.u3.ip);
 }
 
 static int ipv4_get_l4proto(const struct sk_buff *skb, unsigned int nhoff,
@@ -198,7 +197,7 @@ static ctl_table ip_ct_sysctl_table[] = {
 		.data		= &nf_conntrack_max,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_NF_CONNTRACK_COUNT,
@@ -206,7 +205,7 @@ static ctl_table ip_ct_sysctl_table[] = {
 		.data		= &init_net.ct.count,
 		.maxlen		= sizeof(int),
 		.mode		= 0444,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_NF_CONNTRACK_BUCKETS,
@@ -214,7 +213,7 @@ static ctl_table ip_ct_sysctl_table[] = {
 		.data		= &nf_conntrack_htable_size,
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0444,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_NF_CONNTRACK_CHECKSUM,
@@ -222,7 +221,7 @@ static ctl_table ip_ct_sysctl_table[] = {
 		.data		= &init_net.ct.sysctl_checksum,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_NF_CONNTRACK_LOG_INVALID,
@@ -230,8 +229,8 @@ static ctl_table ip_ct_sysctl_table[] = {
 		.data		= &init_net.ct.sysctl_log_invalid,
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
+		.proc_handler	= proc_dointvec_minmax,
+		.strategy	= sysctl_intvec,
 		.extra1		= &log_invalid_proto_min,
 		.extra2		= &log_invalid_proto_max,
 	},
@@ -284,17 +283,17 @@ getorigdst(struct sock *sk, int optval, void __user *user, int *len)
 			.tuple.dst.u3.ip;
 		memset(sin.sin_zero, 0, sizeof(sin.sin_zero));
 
-		pr_debug("SO_ORIGINAL_DST: %u.%u.%u.%u %u\n",
-			 NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port));
+		pr_debug("SO_ORIGINAL_DST: %pI4 %u\n",
+			 &sin.sin_addr.s_addr, ntohs(sin.sin_port));
 		nf_ct_put(ct);
 		if (copy_to_user(user, &sin, sizeof(sin)) != 0)
 			return -EFAULT;
 		else
 			return 0;
 	}
-	pr_debug("SO_ORIGINAL_DST: Can't find %u.%u.%u.%u/%u-%u.%u.%u.%u/%u.\n",
-		 NIPQUAD(tuple.src.u3.ip), ntohs(tuple.src.u.tcp.port),
-		 NIPQUAD(tuple.dst.u3.ip), ntohs(tuple.dst.u.tcp.port));
+	pr_debug("SO_ORIGINAL_DST: Can't find %pI4/%u-%pI4/%u.\n",
+		 &tuple.src.u3.ip, ntohs(tuple.src.u.tcp.port),
+		 &tuple.dst.u3.ip, ntohs(tuple.dst.u.tcp.port));
 	return -ENOENT;
 }
 
diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
index 4e88792..1fd3ef7 100644
--- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
@@ -272,7 +272,7 @@ static struct ctl_table icmp_sysctl_table[] = {
 		.data		= &nf_ct_icmp_timeout,
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
+		.proc_handler	= proc_dointvec_jiffies,
 	},
 	{
 		.ctl_name = 0
@@ -285,7 +285,7 @@ static struct ctl_table icmp_compat_sysctl_table[] = {
 		.data		= &nf_ct_icmp_timeout,
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
+		.proc_handler	= proc_dointvec_jiffies,
 	},
 	{
 		.ctl_name = 0
diff --git a/net/ipv4/netfilter/nf_nat_h323.c b/net/ipv4/netfilter/nf_nat_h323.c
index ee47bf2..7e8e6fc 100644
--- a/net/ipv4/netfilter/nf_nat_h323.c
+++ b/net/ipv4/netfilter/nf_nat_h323.c
@@ -119,10 +119,9 @@ static int set_sig_addr(struct sk_buff *skb, struct nf_conn *ct,
 				    (ntohl(addr.ip) & 0xff000000) == 0x7f000000)
 					i = 0;
 
-				pr_debug("nf_nat_ras: set signal address "
-					 "%u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
-					 NIPQUAD(addr.ip), port,
-					 NIPQUAD(ct->tuplehash[!dir].tuple.dst.u3.ip),
+				pr_debug("nf_nat_ras: set signal address %pI4:%hu->%pI4:%hu\n",
+					 &addr.ip, port,
+					 &ct->tuplehash[!dir].tuple.dst.u3.ip,
 					 info->sig_port[!dir]);
 				return set_h225_addr(skb, data, 0, &taddr[i],
 						     &ct->tuplehash[!dir].
@@ -131,10 +130,9 @@ static int set_sig_addr(struct sk_buff *skb, struct nf_conn *ct,
 			} else if (addr.ip == ct->tuplehash[dir].tuple.dst.u3.ip &&
 				   port == info->sig_port[dir]) {
 				/* GK->GW */
-				pr_debug("nf_nat_ras: set signal address "
-					 "%u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
-					 NIPQUAD(addr.ip), port,
-					 NIPQUAD(ct->tuplehash[!dir].tuple.src.u3.ip),
+				pr_debug("nf_nat_ras: set signal address %pI4:%hu->%pI4:%hu\n",
+					 &addr.ip, port,
+					 &ct->tuplehash[!dir].tuple.src.u3.ip,
 					 info->sig_port[!dir]);
 				return set_h225_addr(skb, data, 0, &taddr[i],
 						     &ct->tuplehash[!dir].
@@ -162,10 +160,9 @@ static int set_ras_addr(struct sk_buff *skb, struct nf_conn *ct,
 		if (get_h225_addr(ct, *data, &taddr[i], &addr, &port) &&
 		    addr.ip == ct->tuplehash[dir].tuple.src.u3.ip &&
 		    port == ct->tuplehash[dir].tuple.src.u.udp.port) {
-			pr_debug("nf_nat_ras: set rasAddress "
-				 "%u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
-				 NIPQUAD(addr.ip), ntohs(port),
-				 NIPQUAD(ct->tuplehash[!dir].tuple.dst.u3.ip),
+			pr_debug("nf_nat_ras: set rasAddress %pI4:%hu->%pI4:%hu\n",
+				 &addr.ip, ntohs(port),
+				 &ct->tuplehash[!dir].tuple.dst.u3.ip,
 				 ntohs(ct->tuplehash[!dir].tuple.dst.u.udp.port));
 			return set_h225_addr(skb, data, 0, &taddr[i],
 					     &ct->tuplehash[!dir].tuple.dst.u3,
@@ -257,15 +254,15 @@ static int nat_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
 	}
 
 	/* Success */
-	pr_debug("nf_nat_h323: expect RTP %u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
-		 NIPQUAD(rtp_exp->tuple.src.u3.ip),
+	pr_debug("nf_nat_h323: expect RTP %pI4:%hu->%pI4:%hu\n",
+		 &rtp_exp->tuple.src.u3.ip,
 		 ntohs(rtp_exp->tuple.src.u.udp.port),
-		 NIPQUAD(rtp_exp->tuple.dst.u3.ip),
+		 &rtp_exp->tuple.dst.u3.ip,
 		 ntohs(rtp_exp->tuple.dst.u.udp.port));
-	pr_debug("nf_nat_h323: expect RTCP %u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
-		 NIPQUAD(rtcp_exp->tuple.src.u3.ip),
+	pr_debug("nf_nat_h323: expect RTCP %pI4:%hu->%pI4:%hu\n",
+		 &rtcp_exp->tuple.src.u3.ip,
 		 ntohs(rtcp_exp->tuple.src.u.udp.port),
-		 NIPQUAD(rtcp_exp->tuple.dst.u3.ip),
+		 &rtcp_exp->tuple.dst.u3.ip,
 		 ntohs(rtcp_exp->tuple.dst.u.udp.port));
 
 	return 0;
@@ -307,10 +304,10 @@ static int nat_t120(struct sk_buff *skb, struct nf_conn *ct,
 		return -1;
 	}
 
-	pr_debug("nf_nat_h323: expect T.120 %u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
-		 NIPQUAD(exp->tuple.src.u3.ip),
+	pr_debug("nf_nat_h323: expect T.120 %pI4:%hu->%pI4:%hu\n",
+		 &exp->tuple.src.u3.ip,
 		 ntohs(exp->tuple.src.u.tcp.port),
-		 NIPQUAD(exp->tuple.dst.u3.ip),
+		 &exp->tuple.dst.u3.ip,
 		 ntohs(exp->tuple.dst.u.tcp.port));
 
 	return 0;
@@ -361,10 +358,10 @@ static int nat_h245(struct sk_buff *skb, struct nf_conn *ct,
 		return -1;
 	}
 
-	pr_debug("nf_nat_q931: expect H.245 %u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
-		 NIPQUAD(exp->tuple.src.u3.ip),
+	pr_debug("nf_nat_q931: expect H.245 %pI4:%hu->%pI4:%hu\n",
+		 &exp->tuple.src.u3.ip,
 		 ntohs(exp->tuple.src.u.tcp.port),
-		 NIPQUAD(exp->tuple.dst.u3.ip),
+		 &exp->tuple.dst.u3.ip,
 		 ntohs(exp->tuple.dst.u.tcp.port));
 
 	return 0;
@@ -455,10 +452,10 @@ static int nat_q931(struct sk_buff *skb, struct nf_conn *ct,
 	}
 
 	/* Success */
-	pr_debug("nf_nat_ras: expect Q.931 %u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
-		 NIPQUAD(exp->tuple.src.u3.ip),
+	pr_debug("nf_nat_ras: expect Q.931 %pI4:%hu->%pI4:%hu\n",
+		 &exp->tuple.src.u3.ip,
 		 ntohs(exp->tuple.src.u.tcp.port),
-		 NIPQUAD(exp->tuple.dst.u3.ip),
+		 &exp->tuple.dst.u3.ip,
 		 ntohs(exp->tuple.dst.u.tcp.port));
 
 	return 0;
@@ -524,11 +521,10 @@ static int nat_callforwarding(struct sk_buff *skb, struct nf_conn *ct,
 	}
 
 	/* Success */
-	pr_debug("nf_nat_q931: expect Call Forwarding "
-		 "%u.%u.%u.%u:%hu->%u.%u.%u.%u:%hu\n",
-		 NIPQUAD(exp->tuple.src.u3.ip),
+	pr_debug("nf_nat_q931: expect Call Forwarding %pI4:%hu->%pI4:%hu\n",
+		 &exp->tuple.src.u3.ip,
 		 ntohs(exp->tuple.src.u.tcp.port),
-		 NIPQUAD(exp->tuple.dst.u3.ip),
+		 &exp->tuple.dst.u3.ip,
 		 ntohs(exp->tuple.dst.u.tcp.port));
 
 	return 0;
diff --git a/net/ipv4/netfilter/nf_nat_irc.c b/net/ipv4/netfilter/nf_nat_irc.c
index fe6f9ce..ea83a88 100644
--- a/net/ipv4/netfilter/nf_nat_irc.c
+++ b/net/ipv4/netfilter/nf_nat_irc.c
@@ -55,8 +55,8 @@ static unsigned int help(struct sk_buff *skb,
 
 	ip = ntohl(exp->master->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip);
 	sprintf(buffer, "%u %u", ip, port);
-	pr_debug("nf_nat_irc: inserting '%s' == %u.%u.%u.%u, port %u\n",
-		 buffer, NIPQUAD(ip), port);
+	pr_debug("nf_nat_irc: inserting '%s' == %pI4, port %u\n",
+		 buffer, &ip, port);
 
 	ret = nf_nat_mangle_tcp_packet(skb, exp->master, ctinfo,
 				       matchoff, matchlen, buffer,
diff --git a/net/ipv4/netfilter/nf_nat_rule.c b/net/ipv4/netfilter/nf_nat_rule.c
index 8d489e7..a7eb047 100644
--- a/net/ipv4/netfilter/nf_nat_rule.c
+++ b/net/ipv4/netfilter/nf_nat_rule.c
@@ -86,25 +86,6 @@ ipt_snat_target(struct sk_buff *skb, const struct xt_target_param *par)
 	return nf_nat_setup_info(ct, &mr->range[0], IP_NAT_MANIP_SRC);
 }
 
-/* Before 2.6.11 we did implicit source NAT if required. Warn about change. */
-static void warn_if_extra_mangle(struct net *net, __be32 dstip, __be32 srcip)
-{
-	static int warned = 0;
-	struct flowi fl = { .nl_u = { .ip4_u = { .daddr = dstip } } };
-	struct rtable *rt;
-
-	if (ip_route_output_key(net, &rt, &fl) != 0)
-		return;
-
-	if (rt->rt_src != srcip && !warned) {
-		printk("NAT: no longer support implicit source local NAT\n");
-		printk("NAT: packet src %u.%u.%u.%u -> dst %u.%u.%u.%u\n",
-		       NIPQUAD(srcip), NIPQUAD(dstip));
-		warned = 1;
-	}
-	ip_rt_put(rt);
-}
-
 static unsigned int
 ipt_dnat_target(struct sk_buff *skb, const struct xt_target_param *par)
 {
@@ -120,11 +101,6 @@ ipt_dnat_target(struct sk_buff *skb, const struct xt_target_param *par)
 	/* Connection must be valid and new. */
 	NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
 
-	if (par->hooknum == NF_INET_LOCAL_OUT &&
-	    mr->range[0].flags & IP_NAT_RANGE_MAP_IPS)
-		warn_if_extra_mangle(dev_net(par->out), ip_hdr(skb)->daddr,
-				     mr->range[0].min_ip);
-
 	return nf_nat_setup_info(ct, &mr->range[0], IP_NAT_MANIP_DST);
 }
 
@@ -166,8 +142,7 @@ alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
 	struct nf_nat_range range
 		= { IP_NAT_RANGE_MAP_IPS, ip, ip, { 0 }, { 0 } };
 
-	pr_debug("Allocating NULL binding for %p (%u.%u.%u.%u)\n",
-		 ct, NIPQUAD(ip));
+	pr_debug("Allocating NULL binding for %p (%pI4)\n", ct, &ip);
 	return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
 }
 
diff --git a/net/ipv4/netfilter/nf_nat_sip.c b/net/ipv4/netfilter/nf_nat_sip.c
index 1454432..07d61a5 100644
--- a/net/ipv4/netfilter/nf_nat_sip.c
+++ b/net/ipv4/netfilter/nf_nat_sip.c
@@ -74,8 +74,7 @@ static int map_addr(struct sk_buff *skb,
 	if (newaddr == addr->ip && newport == port)
 		return 1;
 
-	buflen = sprintf(buffer, "%u.%u.%u.%u:%u",
-			 NIPQUAD(newaddr), ntohs(newport));
+	buflen = sprintf(buffer, "%pI4:%u", &newaddr, ntohs(newport));
 
 	return mangle_packet(skb, dptr, datalen, matchoff, matchlen,
 			     buffer, buflen);
@@ -152,8 +151,8 @@ static unsigned int ip_nat_sip(struct sk_buff *skb,
 					       &addr) > 0 &&
 		    addr.ip == ct->tuplehash[dir].tuple.src.u3.ip &&
 		    addr.ip != ct->tuplehash[!dir].tuple.dst.u3.ip) {
-			__be32 ip = ct->tuplehash[!dir].tuple.dst.u3.ip;
-			buflen = sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(ip));
+			buflen = sprintf(buffer, "%pI4",
+					&ct->tuplehash[!dir].tuple.dst.u3.ip);
 			if (!mangle_packet(skb, dptr, datalen, poff, plen,
 					   buffer, buflen))
 				return NF_DROP;
@@ -166,8 +165,8 @@ static unsigned int ip_nat_sip(struct sk_buff *skb,
 					       &addr) > 0 &&
 		    addr.ip == ct->tuplehash[dir].tuple.dst.u3.ip &&
 		    addr.ip != ct->tuplehash[!dir].tuple.src.u3.ip) {
-			__be32 ip = ct->tuplehash[!dir].tuple.src.u3.ip;
-			buflen = sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(ip));
+			buflen = sprintf(buffer, "%pI4",
+					&ct->tuplehash[!dir].tuple.src.u3.ip);
 			if (!mangle_packet(skb, dptr, datalen, poff, plen,
 					   buffer, buflen))
 				return NF_DROP;
@@ -279,8 +278,7 @@ static unsigned int ip_nat_sip_expect(struct sk_buff *skb,
 
 	if (exp->tuple.dst.u3.ip != exp->saved_ip ||
 	    exp->tuple.dst.u.udp.port != exp->saved_proto.udp.port) {
-		buflen = sprintf(buffer, "%u.%u.%u.%u:%u",
-				 NIPQUAD(newip), port);
+		buflen = sprintf(buffer, "%pI4:%u", &newip, port);
 		if (!mangle_packet(skb, dptr, datalen, matchoff, matchlen,
 				   buffer, buflen))
 			goto err;
@@ -345,7 +343,7 @@ static unsigned int ip_nat_sdp_addr(struct sk_buff *skb, const char **dptr,
 	char buffer[sizeof("nnn.nnn.nnn.nnn")];
 	unsigned int buflen;
 
-	buflen = sprintf(buffer, NIPQUAD_FMT, NIPQUAD(addr->ip));
+	buflen = sprintf(buffer, "%pI4", &addr->ip);
 	if (mangle_sdp_packet(skb, dptr, dataoff, datalen, type, term,
 			      buffer, buflen))
 		return 0;
@@ -380,7 +378,7 @@ static unsigned int ip_nat_sdp_session(struct sk_buff *skb, const char **dptr,
 	unsigned int buflen;
 
 	/* Mangle session description owner and contact addresses */
-	buflen = sprintf(buffer, "%u.%u.%u.%u", NIPQUAD(addr->ip));
+	buflen = sprintf(buffer, "%pI4", &addr->ip);
 	if (mangle_sdp_packet(skb, dptr, dataoff, datalen,
 			       SDP_HDR_OWNER_IP4, SDP_HDR_MEDIA,
 			       buffer, buflen))
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c
index 8303e4b..182f845 100644
--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c
@@ -930,8 +930,8 @@ static inline void mangle_address(unsigned char *begin,
 		}
 
 		if (debug)
-			printk(KERN_DEBUG "bsalg: mapped %u.%u.%u.%u to "
-			       "%u.%u.%u.%u\n", NIPQUAD(old), NIPQUAD(*addr));
+			printk(KERN_DEBUG "bsalg: mapped %pI4 to %pI4\n",
+			       &old, addr);
 	}
 }
 
@@ -1267,9 +1267,8 @@ static int help(struct sk_buff *skb, unsigned int protoff,
 	 */
 	if (ntohs(udph->len) != skb->len - (iph->ihl << 2)) {
 		 if (net_ratelimit())
-			 printk(KERN_WARNING "SNMP: dropping malformed packet "
-				"src=%u.%u.%u.%u dst=%u.%u.%u.%u\n",
-				NIPQUAD(iph->saddr), NIPQUAD(iph->daddr));
+			 printk(KERN_WARNING "SNMP: dropping malformed packet src=%pI4 dst=%pI4\n",
+				&iph->saddr, &iph->daddr);
 		 return NF_DROP;
 	}
 
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index a631a1f..614958b 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -54,8 +54,9 @@ static int sockstat_seq_show(struct seq_file *seq, void *v)
 	socket_seq_show(seq);
 	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
 		   sock_prot_inuse_get(net, &tcp_prot),
-		   atomic_read(&tcp_orphan_count),
-		   tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
+		   (int)percpu_counter_sum_positive(&tcp_orphan_count),
+		   tcp_death_row.tw_count,
+		   (int)percpu_counter_sum_positive(&tcp_sockets_allocated),
 		   atomic_read(&tcp_memory_allocated));
 	seq_printf(seq, "UDP: inuse %d mem %d\n",
 		   sock_prot_inuse_get(net, &udp_prot),
@@ -234,6 +235,9 @@ static const struct snmp_mib snmp4_net_list[] = {
 	SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
 	SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
 	SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
+	SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
+	SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
+	SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
 	SNMP_MIB_SENTINEL
 };
 
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index cd97574..dff8bc4 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -247,7 +247,7 @@ static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
 	}
 
 	if (inet->recverr) {
-		struct iphdr *iph = (struct iphdr*)skb->data;
+		struct iphdr *iph = (struct iphdr *)skb->data;
 		u8 *payload = skb->data + (iph->ihl << 2);
 
 		if (inet->hdrincl)
@@ -465,7 +465,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	 */
 
 	if (msg->msg_namelen) {
-		struct sockaddr_in *usin = (struct sockaddr_in*)msg->msg_name;
+		struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name;
 		err = -EINVAL;
 		if (msg->msg_namelen < sizeof(*usin))
 			goto out;
@@ -572,7 +572,7 @@ back_from_confirm:
 			ipc.addr = rt->rt_dst;
 		lock_sock(sk);
 		err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
-					&ipc, rt, msg->msg_flags);
+					&ipc, &rt, msg->msg_flags);
 		if (err)
 			ip_flush_pending_frames(sk);
 		else if (!(msg->msg_flags & MSG_MORE))
@@ -851,7 +851,7 @@ struct proto raw_prot = {
 static struct sock *raw_get_first(struct seq_file *seq)
 {
 	struct sock *sk;
-	struct raw_iter_state* state = raw_seq_private(seq);
+	struct raw_iter_state *state = raw_seq_private(seq);
 
 	for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
 			++state->bucket) {
@@ -868,7 +868,7 @@ found:
 
 static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
 {
-	struct raw_iter_state* state = raw_seq_private(seq);
+	struct raw_iter_state *state = raw_seq_private(seq);
 
 	do {
 		sk = sk_next(sk);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 2ea6dcc..77bfba9 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -129,6 +129,7 @@ static int ip_rt_mtu_expires __read_mostly	= 10 * 60 * HZ;
 static int ip_rt_min_pmtu __read_mostly		= 512 + 20 + 20;
 static int ip_rt_min_advmss __read_mostly	= 256;
 static int ip_rt_secret_interval __read_mostly	= 10 * 60 * HZ;
+static int rt_chain_length_max __read_mostly	= 20;
 
 static void rt_worker_func(struct work_struct *work);
 static DECLARE_DELAYED_WORK(expires_work, rt_worker_func);
@@ -145,6 +146,7 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst);
 static void		 ipv4_link_failure(struct sk_buff *skb);
 static void		 ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu);
 static int rt_garbage_collect(struct dst_ops *ops);
+static void rt_emergency_hash_rebuild(struct net *net);
 
 
 static struct dst_ops ipv4_dst_ops = {
@@ -158,7 +160,6 @@ static struct dst_ops ipv4_dst_ops = {
 	.link_failure =		ipv4_link_failure,
 	.update_pmtu =		ip_rt_update_pmtu,
 	.local_out =		__ip_local_out,
-	.entry_size =		sizeof(struct rtable),
 	.entries =		ATOMIC_INIT(0),
 };
 
@@ -201,6 +202,7 @@ const __u8 ip_tos2prio[16] = {
 struct rt_hash_bucket {
 	struct rtable	*chain;
 };
+
 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) || \
 	defined(CONFIG_PROVE_LOCKING)
 /*
@@ -674,6 +676,20 @@ static inline u32 rt_score(struct rtable *rt)
 	return score;
 }
 
+static inline bool rt_caching(const struct net *net)
+{
+	return net->ipv4.current_rt_cache_rebuild_count <=
+		net->ipv4.sysctl_rt_cache_rebuild_count;
+}
+
+static inline bool compare_hash_inputs(const struct flowi *fl1,
+					const struct flowi *fl2)
+{
+	return (__force u32)(((fl1->nl_u.ip4_u.daddr ^ fl2->nl_u.ip4_u.daddr) |
+		(fl1->nl_u.ip4_u.saddr ^ fl2->nl_u.ip4_u.saddr) |
+		(fl1->iif ^ fl2->iif)) == 0);
+}
+
 static inline int compare_keys(struct flowi *fl1, struct flowi *fl2)
 {
 	return ((__force u32)((fl1->nl_u.ip4_u.daddr ^ fl2->nl_u.ip4_u.daddr) |
@@ -753,11 +769,24 @@ static void rt_do_flush(int process_context)
 	}
 }
 
+/*
+ * While freeing expired entries, we compute average chain length
+ * and standard deviation, using fixed-point arithmetic.
+ * This to have an estimation of rt_chain_length_max
+ *  rt_chain_length_max = max(elasticity, AVG + 4*SD)
+ * We use 3 bits for frational part, and 29 (or 61) for magnitude.
+ */
+
+#define FRACT_BITS 3
+#define ONE (1UL << FRACT_BITS)
+
 static void rt_check_expire(void)
 {
 	static unsigned int rover;
 	unsigned int i = rover, goal;
 	struct rtable *rth, **rthp;
+	unsigned long length = 0, samples = 0;
+	unsigned long sum = 0, sum2 = 0;
 	u64 mult;
 
 	mult = ((u64)ip_rt_gc_interval) << rt_hash_log;
@@ -766,6 +795,7 @@ static void rt_check_expire(void)
 	goal = (unsigned int)mult;
 	if (goal > rt_hash_mask)
 		goal = rt_hash_mask + 1;
+	length = 0;
 	for (; goal > 0; goal--) {
 		unsigned long tmo = ip_rt_gc_timeout;
 
@@ -775,6 +805,8 @@ static void rt_check_expire(void)
 		if (need_resched())
 			cond_resched();
 
+		samples++;
+
 		if (*rthp == NULL)
 			continue;
 		spin_lock_bh(rt_hash_lock_addr(i));
@@ -789,11 +821,29 @@ static void rt_check_expire(void)
 				if (time_before_eq(jiffies, rth->u.dst.expires)) {
 					tmo >>= 1;
 					rthp = &rth->u.dst.rt_next;
+					/*
+					 * Only bump our length if the hash
+					 * inputs on entries n and n+1 are not
+					 * the same, we only count entries on
+					 * a chain with equal hash inputs once
+					 * so that entries for different QOS
+					 * levels, and other non-hash input
+					 * attributes don't unfairly skew
+					 * the length computation
+					 */
+					if ((*rthp == NULL) ||
+					    !compare_hash_inputs(&(*rthp)->fl,
+								 &rth->fl))
+						length += ONE;
 					continue;
 				}
 			} else if (!rt_may_expire(rth, tmo, ip_rt_gc_timeout)) {
 				tmo >>= 1;
 				rthp = &rth->u.dst.rt_next;
+				if ((*rthp == NULL) ||
+				    !compare_hash_inputs(&(*rthp)->fl,
+							 &rth->fl))
+					length += ONE;
 				continue;
 			}
 
@@ -802,6 +852,15 @@ static void rt_check_expire(void)
 			rt_free(rth);
 		}
 		spin_unlock_bh(rt_hash_lock_addr(i));
+		sum += length;
+		sum2 += length*length;
+	}
+	if (samples) {
+		unsigned long avg = sum / samples;
+		unsigned long sd = int_sqrt(sum2 / samples - avg*avg);
+		rt_chain_length_max = max_t(unsigned long,
+					ip_rt_gc_elasticity,
+					(avg + 4*sd) >> FRACT_BITS);
 	}
 	rover = i;
 }
@@ -851,6 +910,26 @@ static void rt_secret_rebuild(unsigned long __net)
 	mod_timer(&net->ipv4.rt_secret_timer, jiffies + ip_rt_secret_interval);
 }
 
+static void rt_secret_rebuild_oneshot(struct net *net)
+{
+	del_timer_sync(&net->ipv4.rt_secret_timer);
+	rt_cache_invalidate(net);
+	if (ip_rt_secret_interval) {
+		net->ipv4.rt_secret_timer.expires += ip_rt_secret_interval;
+		add_timer(&net->ipv4.rt_secret_timer);
+	}
+}
+
+static void rt_emergency_hash_rebuild(struct net *net)
+{
+	if (net_ratelimit()) {
+		printk(KERN_WARNING "Route hash chain too long!\n");
+		printk(KERN_WARNING "Adjust your secret_interval!\n");
+	}
+
+	rt_secret_rebuild_oneshot(net);
+}
+
 /*
    Short description of GC goals.
 
@@ -989,6 +1068,7 @@ out:	return 0;
 static int rt_intern_hash(unsigned hash, struct rtable *rt, struct rtable **rp)
 {
 	struct rtable	*rth, **rthp;
+	struct rtable	*rthi;
 	unsigned long	now;
 	struct rtable *cand, **candp;
 	u32 		min_score;
@@ -1002,7 +1082,13 @@ restart:
 	candp = NULL;
 	now = jiffies;
 
+	if (!rt_caching(dev_net(rt->u.dst.dev))) {
+		rt_drop(rt);
+		return 0;
+	}
+
 	rthp = &rt_hash_table[hash].chain;
+	rthi = NULL;
 
 	spin_lock_bh(rt_hash_lock_addr(hash));
 	while ((rth = *rthp) != NULL) {
@@ -1048,6 +1134,17 @@ restart:
 		chain_length++;
 
 		rthp = &rth->u.dst.rt_next;
+
+		/*
+		 * check to see if the next entry in the chain
+		 * contains the same hash input values as rt.  If it does
+		 * This is where we will insert into the list, instead of
+		 * at the head.  This groups entries that differ by aspects not
+		 * relvant to the hash function together, which we use to adjust
+		 * our chain length
+		 */
+		if (*rthp && compare_hash_inputs(&(*rthp)->fl, &rt->fl))
+			rthi = rth;
 	}
 
 	if (cand) {
@@ -1061,6 +1158,16 @@ restart:
 			*candp = cand->u.dst.rt_next;
 			rt_free(cand);
 		}
+	} else {
+		if (chain_length > rt_chain_length_max) {
+			struct net *net = dev_net(rt->u.dst.dev);
+			int num = ++net->ipv4.current_rt_cache_rebuild_count;
+			if (!rt_caching(dev_net(rt->u.dst.dev))) {
+				printk(KERN_WARNING "%s: %d rebuilds is over limit, route caching disabled\n",
+					rt->u.dst.dev->name, num);
+			}
+			rt_emergency_hash_rebuild(dev_net(rt->u.dst.dev));
+		}
 	}
 
 	/* Try to bind route to arp only if it is output
@@ -1098,14 +1205,17 @@ restart:
 		}
 	}
 
-	rt->u.dst.rt_next = rt_hash_table[hash].chain;
+	if (rthi)
+		rt->u.dst.rt_next = rthi->u.dst.rt_next;
+	else
+		rt->u.dst.rt_next = rt_hash_table[hash].chain;
+
 #if RT_CACHE_DEBUG >= 2
 	if (rt->u.dst.rt_next) {
 		struct rtable *trt;
-		printk(KERN_DEBUG "rt_cache @%02x: " NIPQUAD_FMT, hash,
-		       NIPQUAD(rt->rt_dst));
+		printk(KERN_DEBUG "rt_cache @%02x: %pI4", hash, &rt->rt_dst);
 		for (trt = rt->u.dst.rt_next; trt; trt = trt->u.dst.rt_next)
-			printk(" . " NIPQUAD_FMT, NIPQUAD(trt->rt_dst));
+			printk(" . %pI4", &trt->rt_dst);
 		printk("\n");
 	}
 #endif
@@ -1114,7 +1224,11 @@ restart:
 	 * previous writes to rt are comitted to memory
 	 * before making rt visible to other CPUS.
 	 */
-	rcu_assign_pointer(rt_hash_table[hash].chain, rt);
+	if (rthi)
+		rcu_assign_pointer(rthi->u.dst.rt_next, rt);
+	else
+		rcu_assign_pointer(rt_hash_table[hash].chain, rt);
+
 	spin_unlock_bh(rt_hash_lock_addr(hash));
 	*rp = rt;
 	return 0;
@@ -1217,6 +1331,9 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
 	    || ipv4_is_zeronet(new_gw))
 		goto reject_redirect;
 
+	if (!rt_caching(net))
+		goto reject_redirect;
+
 	if (!IN_DEV_SHARED_MEDIA(in_dev)) {
 		if (!inet_addr_onlink(in_dev, new_gw, old_gw))
 			goto reject_redirect;
@@ -1267,7 +1384,6 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
 
 				/* Copy all the information. */
 				*rt = *rth;
-				INIT_RCU_HEAD(&rt->u.dst.rcu_head);
 				rt->u.dst.__use		= 1;
 				atomic_set(&rt->u.dst.__refcnt, 1);
 				rt->u.dst.child		= NULL;
@@ -1280,7 +1396,9 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
 				rt->u.dst.path		= &rt->u.dst;
 				rt->u.dst.neighbour	= NULL;
 				rt->u.dst.hh		= NULL;
+#ifdef CONFIG_XFRM
 				rt->u.dst.xfrm		= NULL;
+#endif
 				rt->rt_genid		= rt_genid(net);
 				rt->rt_flags		|= RTCF_REDIRECTED;
 
@@ -1324,11 +1442,10 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
 reject_redirect:
 #ifdef CONFIG_IP_ROUTE_VERBOSE
 	if (IN_DEV_LOG_MARTIANS(in_dev) && net_ratelimit())
-		printk(KERN_INFO "Redirect from " NIPQUAD_FMT " on %s about "
-			NIPQUAD_FMT " ignored.\n"
-			"  Advised path = " NIPQUAD_FMT " -> " NIPQUAD_FMT "\n",
-		       NIPQUAD(old_gw), dev->name, NIPQUAD(new_gw),
-		       NIPQUAD(saddr), NIPQUAD(daddr));
+		printk(KERN_INFO "Redirect from %pI4 on %s about %pI4 ignored.\n"
+			"  Advised path = %pI4 -> %pI4\n",
+		       &old_gw, dev->name, &new_gw,
+		       &saddr, &daddr);
 #endif
 	in_dev_put(in_dev);
 }
@@ -1348,9 +1465,8 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst)
 						rt->fl.oif,
 						rt_genid(dev_net(dst->dev)));
 #if RT_CACHE_DEBUG >= 1
-			printk(KERN_DEBUG "ipv4_negative_advice: redirect to "
-					  NIPQUAD_FMT "/%02x dropped\n",
-				NIPQUAD(rt->rt_dst), rt->fl.fl4_tos);
+			printk(KERN_DEBUG "ipv4_negative_advice: redirect to %pI4/%02x dropped\n",
+				&rt->rt_dst, rt->fl.fl4_tos);
 #endif
 			rt_del(hash, rt);
 			ret = NULL;
@@ -1414,10 +1530,9 @@ void ip_rt_send_redirect(struct sk_buff *skb)
 		if (IN_DEV_LOG_MARTIANS(in_dev) &&
 		    rt->u.dst.rate_tokens == ip_rt_redirect_number &&
 		    net_ratelimit())
-			printk(KERN_WARNING "host " NIPQUAD_FMT "/if%d ignores "
-				"redirects for " NIPQUAD_FMT " to " NIPQUAD_FMT ".\n",
-				NIPQUAD(rt->rt_src), rt->rt_iif,
-				NIPQUAD(rt->rt_dst), NIPQUAD(rt->rt_gateway));
+			printk(KERN_WARNING "host %pI4/if%d ignores redirects for %pI4 to %pI4.\n",
+				&rt->rt_src, rt->rt_iif,
+				&rt->rt_dst, &rt->rt_gateway);
 #endif
 	}
 out:
@@ -1610,8 +1725,8 @@ static void ipv4_link_failure(struct sk_buff *skb)
 
 static int ip_rt_bug(struct sk_buff *skb)
 {
-	printk(KERN_DEBUG "ip_rt_bug: " NIPQUAD_FMT " -> " NIPQUAD_FMT ", %s\n",
-		NIPQUAD(ip_hdr(skb)->saddr), NIPQUAD(ip_hdr(skb)->daddr),
+	printk(KERN_DEBUG "ip_rt_bug: %pI4 -> %pI4, %s\n",
+		&ip_hdr(skb)->saddr, &ip_hdr(skb)->daddr,
 		skb->dev ? skb->dev->name : "?");
 	kfree_skb(skb);
 	return 0;
@@ -1788,9 +1903,8 @@ static void ip_handle_martian_source(struct net_device *dev,
 		 *	RFC1812 recommendation, if source is martian,
 		 *	the only hint is MAC header.
 		 */
-		printk(KERN_WARNING "martian source " NIPQUAD_FMT " from "
-			NIPQUAD_FMT", on dev %s\n",
-			NIPQUAD(daddr), NIPQUAD(saddr), dev->name);
+		printk(KERN_WARNING "martian source %pI4 from %pI4, on dev %s\n",
+			&daddr, &saddr, dev->name);
 		if (dev->hard_header_len && skb_mac_header_was_set(skb)) {
 			int i;
 			const unsigned char *p = skb_mac_header(skb);
@@ -2099,9 +2213,8 @@ martian_destination:
 	RT_CACHE_STAT_INC(in_martian_dst);
 #ifdef CONFIG_IP_ROUTE_VERBOSE
 	if (IN_DEV_LOG_MARTIANS(in_dev) && net_ratelimit())
-		printk(KERN_WARNING "martian destination " NIPQUAD_FMT " from "
-			NIPQUAD_FMT ", dev %s\n",
-			NIPQUAD(daddr), NIPQUAD(saddr), dev->name);
+		printk(KERN_WARNING "martian destination %pI4 from %pI4, dev %s\n",
+			&daddr, &saddr, dev->name);
 #endif
 
 e_hostunreach:
@@ -2130,6 +2243,10 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	struct net *net;
 
 	net = dev_net(dev);
+
+	if (!rt_caching(net))
+		goto skip_cache;
+
 	tos &= IPTOS_RT_MASK;
 	hash = rt_hash(daddr, saddr, iif, rt_genid(net));
 
@@ -2154,6 +2271,7 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	}
 	rcu_read_unlock();
 
+skip_cache:
 	/* Multicast recognition logic is moved from route cache to here.
 	   The problem was that too many Ethernet cards have broken/missing
 	   hardware multicast filters :-( As result the host on multicasting
@@ -2539,6 +2657,9 @@ int __ip_route_output_key(struct net *net, struct rtable **rp,
 	unsigned hash;
 	struct rtable *rth;
 
+	if (!rt_caching(net))
+		goto slow_output;
+
 	hash = rt_hash(flp->fl4_dst, flp->fl4_src, flp->oif, rt_genid(net));
 
 	rcu_read_lock_bh();
@@ -2563,6 +2684,7 @@ int __ip_route_output_key(struct net *net, struct rtable **rp,
 	}
 	rcu_read_unlock_bh();
 
+slow_output:
 	return ip_route_output_slow(net, rp, flp);
 }
 
@@ -2578,7 +2700,6 @@ static struct dst_ops ipv4_dst_blackhole_ops = {
 	.destroy		=	ipv4_dst_destroy,
 	.check			=	ipv4_dst_check,
 	.update_pmtu		=	ipv4_rt_blackhole_update_pmtu,
-	.entry_size		=	sizeof(struct rtable),
 	.entries		=	ATOMIC_INIT(0),
 };
 
@@ -2640,7 +2761,7 @@ int ip_route_output_flow(struct net *net, struct rtable **rp, struct flowi *flp,
 			flp->fl4_src = (*rp)->rt_src;
 		if (!flp->fl4_dst)
 			flp->fl4_dst = (*rp)->rt_dst;
-		err = __xfrm_lookup((struct dst_entry **)rp, flp, sk,
+		err = __xfrm_lookup(net, (struct dst_entry **)rp, flp, sk,
 				    flags ? XFRM_LOOKUP_WAIT : 0);
 		if (err == -EREMOTE)
 			err = ipv4_dst_blackhole(net, rp, flp);
@@ -2995,7 +3116,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ipv4_dst_ops.gc_thresh,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_MAX_SIZE,
@@ -3003,7 +3124,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_max_size,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		/*  Deprecated. Use gc_min_interval_ms */
@@ -3013,8 +3134,8 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_gc_min_interval,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies,
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS,
@@ -3022,8 +3143,8 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_gc_min_interval,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_ms_jiffies,
-		.strategy	= &sysctl_ms_jiffies,
+		.proc_handler	= proc_dointvec_ms_jiffies,
+		.strategy	= sysctl_ms_jiffies,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_GC_TIMEOUT,
@@ -3031,8 +3152,8 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_gc_timeout,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies,
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_GC_INTERVAL,
@@ -3040,8 +3161,8 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_gc_interval,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies,
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_REDIRECT_LOAD,
@@ -3049,7 +3170,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_redirect_load,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_REDIRECT_NUMBER,
@@ -3057,7 +3178,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_redirect_number,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_REDIRECT_SILENCE,
@@ -3065,7 +3186,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_redirect_silence,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_ERROR_COST,
@@ -3073,7 +3194,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_error_cost,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_ERROR_BURST,
@@ -3081,7 +3202,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_error_burst,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_GC_ELASTICITY,
@@ -3089,7 +3210,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_gc_elasticity,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_MTU_EXPIRES,
@@ -3097,8 +3218,8 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_mtu_expires,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies,
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_MIN_PMTU,
@@ -3106,7 +3227,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_min_pmtu,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_MIN_ADVMSS,
@@ -3114,7 +3235,7 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_min_advmss,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_ROUTE_SECRET_INTERVAL,
@@ -3122,8 +3243,8 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_secret_interval,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &ipv4_sysctl_rt_secret_interval,
-		.strategy	= &ipv4_sysctl_rt_secret_interval_strategy,
+		.proc_handler	= ipv4_sysctl_rt_secret_interval,
+		.strategy	= ipv4_sysctl_rt_secret_interval_strategy,
 	},
 	{ .ctl_name = 0 }
 };
@@ -3151,8 +3272,8 @@ static struct ctl_table ipv4_route_flush_table[] = {
 		.procname	= "flush",
 		.maxlen		= sizeof(int),
 		.mode		= 0200,
-		.proc_handler	= &ipv4_sysctl_rtcache_flush,
-		.strategy	= &ipv4_sysctl_rtcache_flush_strategy,
+		.proc_handler	= ipv4_sysctl_rtcache_flush,
+		.strategy	= ipv4_sysctl_rtcache_flush_strategy,
 	},
 	{ .ctl_name = 0 },
 };
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 1bb10df..4710d21 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -195,7 +195,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_timestamps,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_WINDOW_SCALING,
@@ -203,7 +203,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_window_scaling,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_SACK,
@@ -211,7 +211,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_sack,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_RETRANS_COLLAPSE,
@@ -219,7 +219,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_retrans_collapse,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_DEFAULT_TTL,
@@ -227,8 +227,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_ip_default_ttl,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &ipv4_doint_and_flush,
-		.strategy	= &ipv4_doint_and_flush_strategy,
+		.proc_handler	= ipv4_doint_and_flush,
+		.strategy	= ipv4_doint_and_flush_strategy,
 		.extra2		= &init_net,
 	},
 	{
@@ -237,7 +237,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &ipv4_config.no_pmtu_disc,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_NONLOCAL_BIND,
@@ -245,7 +245,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_ip_nonlocal_bind,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_SYN_RETRIES,
@@ -253,7 +253,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_syn_retries,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_SYNACK_RETRIES,
@@ -261,7 +261,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_synack_retries,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_MAX_ORPHANS,
@@ -269,7 +269,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_max_orphans,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_MAX_TW_BUCKETS,
@@ -277,7 +277,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &tcp_death_row.sysctl_max_tw_buckets,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_DYNADDR,
@@ -285,7 +285,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_ip_dynaddr,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_KEEPALIVE_TIME,
@@ -293,8 +293,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_keepalive_time,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_KEEPALIVE_PROBES,
@@ -302,7 +302,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_keepalive_probes,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_KEEPALIVE_INTVL,
@@ -310,8 +310,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_keepalive_intvl,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_RETRIES1,
@@ -319,8 +319,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_retries1,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
+		.proc_handler	= proc_dointvec_minmax,
+		.strategy	= sysctl_intvec,
 		.extra2		= &tcp_retr1_max
 	},
 	{
@@ -329,7 +329,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_retries2,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_FIN_TIMEOUT,
@@ -337,8 +337,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_fin_timeout,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies
 	},
 #ifdef CONFIG_SYN_COOKIES
 	{
@@ -347,7 +347,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_syncookies,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 #endif
 	{
@@ -356,7 +356,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &tcp_death_row.sysctl_tw_recycle,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_ABORT_ON_OVERFLOW,
@@ -364,7 +364,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_abort_on_overflow,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_STDURG,
@@ -372,7 +372,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_stdurg,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_RFC1337,
@@ -380,7 +380,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_rfc1337,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_MAX_SYN_BACKLOG,
@@ -388,7 +388,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_max_syn_backlog,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_LOCAL_PORT_RANGE,
@@ -396,8 +396,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_local_ports.range,
 		.maxlen		= sizeof(sysctl_local_ports.range),
 		.mode		= 0644,
-		.proc_handler	= &ipv4_local_port_range,
-		.strategy	= &ipv4_sysctl_local_port_range,
+		.proc_handler	= ipv4_local_port_range,
+		.strategy	= ipv4_sysctl_local_port_range,
 	},
 #ifdef CONFIG_IP_MULTICAST
 	{
@@ -406,7 +406,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_igmp_max_memberships,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 
 #endif
@@ -416,7 +416,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_igmp_max_msf,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_INET_PEER_THRESHOLD,
@@ -424,7 +424,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &inet_peer_threshold,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_INET_PEER_MINTTL,
@@ -432,8 +432,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &inet_peer_minttl,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies
 	},
 	{
 		.ctl_name	= NET_IPV4_INET_PEER_MAXTTL,
@@ -441,8 +441,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &inet_peer_maxttl,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies
 	},
 	{
 		.ctl_name	= NET_IPV4_INET_PEER_GC_MINTIME,
@@ -450,8 +450,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &inet_peer_gc_mintime,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies
 	},
 	{
 		.ctl_name	= NET_IPV4_INET_PEER_GC_MAXTIME,
@@ -459,8 +459,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &inet_peer_gc_maxtime,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies
+		.proc_handler	= proc_dointvec_jiffies,
+		.strategy	= sysctl_jiffies
 	},
 	{
 		.ctl_name	= NET_TCP_ORPHAN_RETRIES,
@@ -468,7 +468,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_orphan_retries,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_FACK,
@@ -476,7 +476,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_fack,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_REORDERING,
@@ -484,7 +484,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_reordering,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_ECN,
@@ -492,7 +492,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_ecn,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_DSACK,
@@ -500,7 +500,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_dsack,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_MEM,
@@ -508,7 +508,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_mem,
 		.maxlen		= sizeof(sysctl_tcp_mem),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_WMEM,
@@ -516,7 +516,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_wmem,
 		.maxlen		= sizeof(sysctl_tcp_wmem),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_RMEM,
@@ -524,7 +524,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_rmem,
 		.maxlen		= sizeof(sysctl_tcp_rmem),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_APP_WIN,
@@ -532,7 +532,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_app_win,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_ADV_WIN_SCALE,
@@ -540,7 +540,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_adv_win_scale,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_TW_REUSE,
@@ -548,7 +548,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_tw_reuse,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_FRTO,
@@ -556,7 +556,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_frto,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_FRTO_RESPONSE,
@@ -564,7 +564,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_frto_response,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_LOW_LATENCY,
@@ -572,7 +572,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_low_latency,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_TCP_NO_METRICS_SAVE,
@@ -580,7 +580,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_nometrics_save,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_TCP_MODERATE_RCVBUF,
@@ -588,7 +588,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_moderate_rcvbuf,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_TCP_TSO_WIN_DIVISOR,
@@ -596,15 +596,15 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_tso_win_divisor,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_TCP_CONG_CONTROL,
 		.procname	= "tcp_congestion_control",
 		.mode		= 0644,
 		.maxlen		= TCP_CA_NAME_MAX,
-		.proc_handler	= &proc_tcp_congestion_control,
-		.strategy	= &sysctl_tcp_congestion_control,
+		.proc_handler	= proc_tcp_congestion_control,
+		.strategy	= sysctl_tcp_congestion_control,
 	},
 	{
 		.ctl_name	= NET_TCP_ABC,
@@ -612,7 +612,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_abc,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_TCP_MTU_PROBING,
@@ -620,7 +620,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_mtu_probing,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_TCP_BASE_MSS,
@@ -628,7 +628,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_base_mss,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,
@@ -636,7 +636,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_workaround_signed_windows,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 #ifdef CONFIG_NET_DMA
 	{
@@ -645,7 +645,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_dma_copybreak,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 #endif
 	{
@@ -654,7 +654,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_slow_start_after_idle,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 #ifdef CONFIG_NETLABEL
 	{
@@ -663,7 +663,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &cipso_v4_cache_enabled,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_CIPSOV4_CACHE_BUCKET_SIZE,
@@ -671,7 +671,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &cipso_v4_cache_bucketsize,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_CIPSOV4_RBM_OPTFMT,
@@ -679,7 +679,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &cipso_v4_rbm_optfmt,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= NET_CIPSOV4_RBM_STRICTVALID,
@@ -687,22 +687,22 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &cipso_v4_rbm_strictvalid,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 #endif /* CONFIG_NETLABEL */
 	{
 		.procname	= "tcp_available_congestion_control",
 		.maxlen		= TCP_CA_BUF_MAX,
 		.mode		= 0444,
-		.proc_handler   = &proc_tcp_available_congestion_control,
+		.proc_handler   = proc_tcp_available_congestion_control,
 	},
 	{
 		.ctl_name	= NET_TCP_ALLOWED_CONG_CONTROL,
 		.procname	= "tcp_allowed_congestion_control",
 		.maxlen		= TCP_CA_BUF_MAX,
 		.mode		= 0644,
-		.proc_handler   = &proc_allowed_congestion_control,
-		.strategy	= &strategy_allowed_congestion_control,
+		.proc_handler   = proc_allowed_congestion_control,
+		.strategy	= strategy_allowed_congestion_control,
 	},
 	{
 		.ctl_name	= NET_TCP_MAX_SSTHRESH,
@@ -710,7 +710,7 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_tcp_max_ssthresh,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	},
 	{
 		.ctl_name	= CTL_UNNUMBERED,
@@ -718,8 +718,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_udp_mem,
 		.maxlen		= sizeof(sysctl_udp_mem),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
+		.proc_handler	= proc_dointvec_minmax,
+		.strategy	= sysctl_intvec,
 		.extra1		= &zero
 	},
 	{
@@ -728,8 +728,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_udp_rmem_min,
 		.maxlen		= sizeof(sysctl_udp_rmem_min),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
+		.proc_handler	= proc_dointvec_minmax,
+		.strategy	= sysctl_intvec,
 		.extra1		= &zero
 	},
 	{
@@ -738,8 +738,8 @@ static struct ctl_table ipv4_table[] = {
 		.data		= &sysctl_udp_wmem_min,
 		.maxlen		= sizeof(sysctl_udp_wmem_min),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
+		.proc_handler	= proc_dointvec_minmax,
+		.strategy	= sysctl_intvec,
 		.extra1		= &zero
 	},
 	{ .ctl_name = 0 }
@@ -752,7 +752,7 @@ static struct ctl_table ipv4_net_table[] = {
 		.data		= &init_net.ipv4.sysctl_icmp_echo_ignore_all,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,
@@ -760,7 +760,7 @@ static struct ctl_table ipv4_net_table[] = {
 		.data		= &init_net.ipv4.sysctl_icmp_echo_ignore_broadcasts,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,
@@ -768,7 +768,7 @@ static struct ctl_table ipv4_net_table[] = {
 		.data		= &init_net.ipv4.sysctl_icmp_ignore_bogus_error_responses,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
@@ -776,7 +776,7 @@ static struct ctl_table ipv4_net_table[] = {
 		.data		= &init_net.ipv4.sysctl_icmp_errors_use_inbound_ifaddr,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
 	},
 	{
 		.ctl_name	= NET_IPV4_ICMP_RATELIMIT,
@@ -784,8 +784,8 @@ static struct ctl_table ipv4_net_table[] = {
 		.data		= &init_net.ipv4.sysctl_icmp_ratelimit,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_ms_jiffies,
-		.strategy	= &sysctl_ms_jiffies
+		.proc_handler	= proc_dointvec_ms_jiffies,
+		.strategy	= sysctl_ms_jiffies
 	},
 	{
 		.ctl_name	= NET_IPV4_ICMP_RATEMASK,
@@ -793,7 +793,15 @@ static struct ctl_table ipv4_net_table[] = {
 		.data		= &init_net.ipv4.sysctl_icmp_ratemask,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
+		.proc_handler	= proc_dointvec
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "rt_cache_rebuild_count",
+		.data		= &init_net.ipv4.sysctl_rt_cache_rebuild_count,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec
 	},
 	{ }
 };
@@ -827,8 +835,12 @@ static __net_init int ipv4_sysctl_init_net(struct net *net)
 			&net->ipv4.sysctl_icmp_ratelimit;
 		table[5].data =
 			&net->ipv4.sysctl_icmp_ratemask;
+		table[6].data =
+			&net->ipv4.sysctl_rt_cache_rebuild_count;
 	}
 
+	net->ipv4.sysctl_rt_cache_rebuild_count = 4;
+
 	net->ipv4.ipv4_hdr = register_net_sysctl_table(net,
 			net_ipv4_ctl_path, table);
 	if (net->ipv4.ipv4_hdr == NULL)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index c5aca0b..1f3d529 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -277,8 +277,7 @@
 
 int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT;
 
-atomic_t tcp_orphan_count = ATOMIC_INIT(0);
-
+struct percpu_counter tcp_orphan_count;
 EXPORT_SYMBOL_GPL(tcp_orphan_count);
 
 int sysctl_tcp_mem[3] __read_mostly;
@@ -290,9 +289,12 @@ EXPORT_SYMBOL(sysctl_tcp_rmem);
 EXPORT_SYMBOL(sysctl_tcp_wmem);
 
 atomic_t tcp_memory_allocated;	/* Current allocated memory. */
-atomic_t tcp_sockets_allocated;	/* Current number of TCP sockets. */
-
 EXPORT_SYMBOL(tcp_memory_allocated);
+
+/*
+ * Current number of TCP sockets.
+ */
+struct percpu_counter tcp_sockets_allocated;
 EXPORT_SYMBOL(tcp_sockets_allocated);
 
 /*
@@ -1680,7 +1682,7 @@ void tcp_set_state(struct sock *sk, int state)
 			inet_put_port(sk);
 		/* fall through */
 	default:
-		if (oldstate==TCP_ESTABLISHED)
+		if (oldstate == TCP_ESTABLISHED)
 			TCP_DEC_STATS(sock_net(sk), TCP_MIB_CURRESTAB);
 	}
 
@@ -1690,7 +1692,7 @@ void tcp_set_state(struct sock *sk, int state)
 	sk->sk_state = state;
 
 #ifdef STATE_TRACE
-	SOCK_DEBUG(sk, "TCP sk=%p, State %s -> %s\n",sk, statename[oldstate],statename[state]);
+	SOCK_DEBUG(sk, "TCP sk=%p, State %s -> %s\n", sk, statename[oldstate], statename[state]);
 #endif
 }
 EXPORT_SYMBOL_GPL(tcp_set_state);
@@ -1834,7 +1836,7 @@ adjudge_to_death:
 	state = sk->sk_state;
 	sock_hold(sk);
 	sock_orphan(sk);
-	atomic_inc(sk->sk_prot->orphan_count);
+	percpu_counter_inc(sk->sk_prot->orphan_count);
 
 	/* It is the last release_sock in its life. It will remove backlog. */
 	release_sock(sk);
@@ -1885,9 +1887,11 @@ adjudge_to_death:
 		}
 	}
 	if (sk->sk_state != TCP_CLOSE) {
+		int orphan_count = percpu_counter_read_positive(
+						sk->sk_prot->orphan_count);
+
 		sk_mem_reclaim(sk);
-		if (tcp_too_many_orphans(sk,
-				atomic_read(sk->sk_prot->orphan_count))) {
+		if (tcp_too_many_orphans(sk, orphan_count)) {
 			if (net_ratelimit())
 				printk(KERN_INFO "TCP: too many of orphaned "
 				       "sockets\n");
@@ -2461,6 +2465,106 @@ out:
 }
 EXPORT_SYMBOL(tcp_tso_segment);
 
+struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb)
+{
+	struct sk_buff **pp = NULL;
+	struct sk_buff *p;
+	struct tcphdr *th;
+	struct tcphdr *th2;
+	unsigned int thlen;
+	unsigned int flags;
+	unsigned int total;
+	unsigned int mss = 1;
+	int flush = 1;
+
+	if (!pskb_may_pull(skb, sizeof(*th)))
+		goto out;
+
+	th = tcp_hdr(skb);
+	thlen = th->doff * 4;
+	if (thlen < sizeof(*th))
+		goto out;
+
+	if (!pskb_may_pull(skb, thlen))
+		goto out;
+
+	th = tcp_hdr(skb);
+	__skb_pull(skb, thlen);
+
+	flags = tcp_flag_word(th);
+
+	for (; (p = *head); head = &p->next) {
+		if (!NAPI_GRO_CB(p)->same_flow)
+			continue;
+
+		th2 = tcp_hdr(p);
+
+		if (th->source != th2->source || th->dest != th2->dest) {
+			NAPI_GRO_CB(p)->same_flow = 0;
+			continue;
+		}
+
+		goto found;
+	}
+
+	goto out_check_final;
+
+found:
+	flush = NAPI_GRO_CB(p)->flush;
+	flush |= flags & TCP_FLAG_CWR;
+	flush |= (flags ^ tcp_flag_word(th2)) &
+		  ~(TCP_FLAG_CWR | TCP_FLAG_FIN | TCP_FLAG_PSH);
+	flush |= th->ack_seq != th2->ack_seq || th->window != th2->window;
+	flush |= memcmp(th + 1, th2 + 1, thlen - sizeof(*th));
+
+	total = p->len;
+	mss = total;
+	if (skb_shinfo(p)->frag_list)
+		mss = skb_shinfo(p)->frag_list->len;
+
+	flush |= skb->len > mss || skb->len <= 0;
+	flush |= ntohl(th2->seq) + total != ntohl(th->seq);
+
+	if (flush || skb_gro_receive(head, skb)) {
+		mss = 1;
+		goto out_check_final;
+	}
+
+	p = *head;
+	th2 = tcp_hdr(p);
+	tcp_flag_word(th2) |= flags & (TCP_FLAG_FIN | TCP_FLAG_PSH);
+
+out_check_final:
+	flush = skb->len < mss;
+	flush |= flags & (TCP_FLAG_URG | TCP_FLAG_PSH | TCP_FLAG_RST |
+			  TCP_FLAG_SYN | TCP_FLAG_FIN);
+
+	if (p && (!NAPI_GRO_CB(skb)->same_flow || flush))
+		pp = head;
+
+out:
+	NAPI_GRO_CB(skb)->flush |= flush;
+
+	return pp;
+}
+
+int tcp_gro_complete(struct sk_buff *skb)
+{
+	struct tcphdr *th = tcp_hdr(skb);
+
+	skb->csum_start = skb_transport_header(skb) - skb->head;
+	skb->csum_offset = offsetof(struct tcphdr, check);
+	skb->ip_summed = CHECKSUM_PARTIAL;
+
+	skb_shinfo(skb)->gso_size = skb_shinfo(skb)->frag_list->len;
+	skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
+
+	if (th->cwr)
+		skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
+
+	return 0;
+}
+
 #ifdef CONFIG_TCP_MD5SIG
 static unsigned long tcp_md5sig_users;
 static struct tcp_md5sig_pool **tcp_md5sig_pool;
@@ -2650,7 +2754,7 @@ EXPORT_SYMBOL(tcp_md5_hash_key);
 
 void tcp_done(struct sock *sk)
 {
-	if(sk->sk_state == TCP_SYN_SENT || sk->sk_state == TCP_SYN_RECV)
+	if (sk->sk_state == TCP_SYN_SENT || sk->sk_state == TCP_SYN_RECV)
 		TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_ATTEMPTFAILS);
 
 	tcp_set_state(sk, TCP_CLOSE);
@@ -2685,6 +2789,8 @@ void __init tcp_init(void)
 
 	BUILD_BUG_ON(sizeof(struct tcp_skb_cb) > sizeof(skb->cb));
 
+	percpu_counter_init(&tcp_sockets_allocated, 0);
+	percpu_counter_init(&tcp_orphan_count, 0);
 	tcp_hashinfo.bind_bucket_cachep =
 		kmem_cache_create("tcp_bind_bucket",
 				  sizeof(struct inet_bind_bucket), 0,
@@ -2707,8 +2813,8 @@ void __init tcp_init(void)
 					thash_entries ? 0 : 512 * 1024);
 	tcp_hashinfo.ehash_size = 1 << tcp_hashinfo.ehash_size;
 	for (i = 0; i < tcp_hashinfo.ehash_size; i++) {
-		INIT_HLIST_HEAD(&tcp_hashinfo.ehash[i].chain);
-		INIT_HLIST_HEAD(&tcp_hashinfo.ehash[i].twchain);
+		INIT_HLIST_NULLS_HEAD(&tcp_hashinfo.ehash[i].chain, i);
+		INIT_HLIST_NULLS_HEAD(&tcp_hashinfo.ehash[i].twchain, i);
 	}
 	if (inet_ehash_locks_alloc(&tcp_hashinfo))
 		panic("TCP: failed to alloc ehash_locks");
diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c
index 4a1221e..ee467ec 100644
--- a/net/ipv4/tcp_cubic.c
+++ b/net/ipv4/tcp_cubic.c
@@ -1,13 +1,23 @@
 /*
- * TCP CUBIC: Binary Increase Congestion control for TCP v2.2
+ * TCP CUBIC: Binary Increase Congestion control for TCP v2.3
  * Home page:
  *      http://netsrv.csc.ncsu.edu/twiki/bin/view/Main/BIC
  * This is from the implementation of CUBIC TCP in
- * Injong Rhee, Lisong Xu.
- *  "CUBIC: A New TCP-Friendly High-Speed TCP Variant
- *  in PFLDnet 2005
+ * Sangtae Ha, Injong Rhee and Lisong Xu,
+ *  "CUBIC: A New TCP-Friendly High-Speed TCP Variant"
+ *  in ACM SIGOPS Operating System Review, July 2008.
  * Available from:
- *  http://netsrv.csc.ncsu.edu/export/cubic-paper.pdf
+ *  http://netsrv.csc.ncsu.edu/export/cubic_a_new_tcp_2008.pdf
+ *
+ * CUBIC integrates a new slow start algorithm, called HyStart.
+ * The details of HyStart are presented in
+ *  Sangtae Ha and Injong Rhee,
+ *  "Taming the Elephants: New TCP Slow Start", NCSU TechReport 2008.
+ * Available from:
+ *  http://netsrv.csc.ncsu.edu/export/hystart_techreport_2008.pdf
+ *
+ * All testing results are available from:
+ * http://netsrv.csc.ncsu.edu/wiki/index.php/TCP_Testing
  *
  * Unless CUBIC is enabled and congestion window is large
  * this behaves the same as the original Reno.
@@ -23,12 +33,26 @@
 					 */
 #define	BICTCP_HZ		10	/* BIC HZ 2^10 = 1024 */
 
+/* Two methods of hybrid slow start */
+#define HYSTART_ACK_TRAIN	0x1
+#define HYSTART_DELAY		0x2
+
+/* Number of delay samples for detecting the increase of delay */
+#define HYSTART_MIN_SAMPLES	8
+#define HYSTART_DELAY_MIN	(2U<<3)
+#define HYSTART_DELAY_MAX	(16U<<3)
+#define HYSTART_DELAY_THRESH(x)	clamp(x, HYSTART_DELAY_MIN, HYSTART_DELAY_MAX)
+
 static int fast_convergence __read_mostly = 1;
 static int beta __read_mostly = 717;	/* = 717/1024 (BICTCP_BETA_SCALE) */
 static int initial_ssthresh __read_mostly;
 static int bic_scale __read_mostly = 41;
 static int tcp_friendliness __read_mostly = 1;
 
+static int hystart __read_mostly = 1;
+static int hystart_detect __read_mostly = HYSTART_ACK_TRAIN | HYSTART_DELAY;
+static int hystart_low_window __read_mostly = 16;
+
 static u32 cube_rtt_scale __read_mostly;
 static u32 beta_scale __read_mostly;
 static u64 cube_factor __read_mostly;
@@ -44,6 +68,13 @@ module_param(bic_scale, int, 0444);
 MODULE_PARM_DESC(bic_scale, "scale (scaled by 1024) value for bic function (bic_scale/1024)");
 module_param(tcp_friendliness, int, 0644);
 MODULE_PARM_DESC(tcp_friendliness, "turn on/off tcp friendliness");
+module_param(hystart, int, 0644);
+MODULE_PARM_DESC(hystart, "turn on/off hybrid slow start algorithm");
+module_param(hystart_detect, int, 0644);
+MODULE_PARM_DESC(hystart_detect, "hyrbrid slow start detection mechanisms"
+		 " 1: packet-train 2: delay 3: both packet-train and delay");
+module_param(hystart_low_window, int, 0644);
+MODULE_PARM_DESC(hystart_low_window, "lower bound cwnd for hybrid slow start");
 
 /* BIC TCP Parameters */
 struct bictcp {
@@ -59,7 +90,13 @@ struct bictcp {
 	u32	ack_cnt;	/* number of acks */
 	u32	tcp_cwnd;	/* estimated tcp cwnd */
 #define ACK_RATIO_SHIFT	4
-	u32	delayed_ack;	/* estimate the ratio of Packets/ACKs << 4 */
+	u16	delayed_ack;	/* estimate the ratio of Packets/ACKs << 4 */
+	u8	sample_cnt;	/* number of samples to decide curr_rtt */
+	u8	found;		/* the exit point is found? */
+	u32	round_start;	/* beginning of each round */
+	u32	end_seq;	/* end_seq of the round */
+	u32	last_jiffies;	/* last time when the ACK spacing is close */
+	u32	curr_rtt;	/* the minimum rtt of current round */
 };
 
 static inline void bictcp_reset(struct bictcp *ca)
@@ -76,12 +113,28 @@ static inline void bictcp_reset(struct bictcp *ca)
 	ca->delayed_ack = 2 << ACK_RATIO_SHIFT;
 	ca->ack_cnt = 0;
 	ca->tcp_cwnd = 0;
+	ca->found = 0;
+}
+
+static inline void bictcp_hystart_reset(struct sock *sk)
+{
+	struct tcp_sock *tp = tcp_sk(sk);
+	struct bictcp *ca = inet_csk_ca(sk);
+
+	ca->round_start = ca->last_jiffies = jiffies;
+	ca->end_seq = tp->snd_nxt;
+	ca->curr_rtt = 0;
+	ca->sample_cnt = 0;
 }
 
 static void bictcp_init(struct sock *sk)
 {
 	bictcp_reset(inet_csk_ca(sk));
-	if (initial_ssthresh)
+
+	if (hystart)
+		bictcp_hystart_reset(sk);
+
+	if (!hystart && initial_ssthresh)
 		tcp_sk(sk)->snd_ssthresh = initial_ssthresh;
 }
 
@@ -235,9 +288,11 @@ static void bictcp_cong_avoid(struct sock *sk, u32 ack, u32 in_flight)
 	if (!tcp_is_cwnd_limited(sk, in_flight))
 		return;
 
-	if (tp->snd_cwnd <= tp->snd_ssthresh)
+	if (tp->snd_cwnd <= tp->snd_ssthresh) {
+		if (hystart && after(ack, ca->end_seq))
+			bictcp_hystart_reset(sk);
 		tcp_slow_start(tp);
-	else {
+	} else {
 		bictcp_update(ca, tp->snd_cwnd);
 
 		/* In dangerous area, increase slowly.
@@ -281,8 +336,45 @@ static u32 bictcp_undo_cwnd(struct sock *sk)
 
 static void bictcp_state(struct sock *sk, u8 new_state)
 {
-	if (new_state == TCP_CA_Loss)
+	if (new_state == TCP_CA_Loss) {
 		bictcp_reset(inet_csk_ca(sk));
+		bictcp_hystart_reset(sk);
+	}
+}
+
+static void hystart_update(struct sock *sk, u32 delay)
+{
+	struct tcp_sock *tp = tcp_sk(sk);
+	struct bictcp *ca = inet_csk_ca(sk);
+
+	if (!(ca->found & hystart_detect)) {
+		u32 curr_jiffies = jiffies;
+
+		/* first detection parameter - ack-train detection */
+		if (curr_jiffies - ca->last_jiffies <= msecs_to_jiffies(2)) {
+			ca->last_jiffies = curr_jiffies;
+			if (curr_jiffies - ca->round_start >= ca->delay_min>>4)
+				ca->found |= HYSTART_ACK_TRAIN;
+		}
+
+		/* obtain the minimum delay of more than sampling packets */
+		if (ca->sample_cnt < HYSTART_MIN_SAMPLES) {
+			if (ca->curr_rtt == 0 || ca->curr_rtt > delay)
+				ca->curr_rtt = delay;
+
+			ca->sample_cnt++;
+		} else {
+			if (ca->curr_rtt > ca->delay_min +
+			    HYSTART_DELAY_THRESH(ca->delay_min>>4))
+				ca->found |= HYSTART_DELAY;
+		}
+		/*
+		 * Either one of two conditions are met,
+		 * we exit from slow start immediately.
+		 */
+		if (ca->found & hystart_detect)
+			tp->snd_ssthresh = tp->snd_cwnd;
+	}
 }
 
 /* Track delayed acknowledgment ratio using sliding window
@@ -291,6 +383,7 @@ static void bictcp_state(struct sock *sk, u8 new_state)
 static void bictcp_acked(struct sock *sk, u32 cnt, s32 rtt_us)
 {
 	const struct inet_connection_sock *icsk = inet_csk(sk);
+	const struct tcp_sock *tp = tcp_sk(sk);
 	struct bictcp *ca = inet_csk_ca(sk);
 	u32 delay;
 
@@ -314,6 +407,11 @@ static void bictcp_acked(struct sock *sk, u32 cnt, s32 rtt_us)
 	/* first time call or link delay decreases */
 	if (ca->delay_min == 0 || ca->delay_min > delay)
 		ca->delay_min = delay;
+
+	/* hystart triggers when cwnd is larger than some threshold */
+	if (hystart && tp->snd_cwnd <= tp->snd_ssthresh &&
+	    tp->snd_cwnd >= hystart_low_window)
+		hystart_update(sk, delay);
 }
 
 static struct tcp_congestion_ops cubictcp = {
@@ -372,4 +470,4 @@ module_exit(cubictcp_unregister);
 MODULE_AUTHOR("Sangtae Ha, Stephen Hemminger");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("CUBIC TCP");
-MODULE_VERSION("2.2");
+MODULE_VERSION("2.3");
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index 838d491..fcbcd4f 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -34,7 +34,7 @@ static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
 		tcp_get_info(sk, info);
 }
 
-static struct inet_diag_handler tcp_diag_handler = {
+static const struct inet_diag_handler tcp_diag_handler = {
 	.idiag_hashinfo	 = &tcp_hashinfo,
 	.idiag_get_info	 = tcp_diag_get_info,
 	.idiag_type	 = TCPDIAG_GETSOCK,
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index d77c0d2..99b7ecb 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -701,13 +701,10 @@ static inline void tcp_set_rto(struct sock *sk)
 	 *    all the algo is pure shit and should be replaced
 	 *    with correct one. It is exactly, which we pretend to do.
 	 */
-}
 
-/* NOTE: clamping at TCP_RTO_MIN is not required, current algo
- * guarantees that rto is higher.
- */
-static inline void tcp_bound_rto(struct sock *sk)
-{
+	/* NOTE: clamping at TCP_RTO_MIN is not required, current algo
+	 * guarantees that rto is higher.
+	 */
 	if (inet_csk(sk)->icsk_rto > TCP_RTO_MAX)
 		inet_csk(sk)->icsk_rto = TCP_RTO_MAX;
 }
@@ -928,7 +925,6 @@ static void tcp_init_metrics(struct sock *sk)
 		tp->mdev_max = tp->rttvar = max(tp->mdev, tcp_rto_min(sk));
 	}
 	tcp_set_rto(sk);
-	tcp_bound_rto(sk);
 	if (inet_csk(sk)->icsk_rto < TCP_TIMEOUT_INIT && !tp->rx_opt.saw_tstamp)
 		goto reset;
 	tp->snd_cwnd = tcp_init_cwnd(tp, dst);
@@ -1002,7 +998,8 @@ static void tcp_skb_mark_lost(struct tcp_sock *tp, struct sk_buff *skb)
 	}
 }
 
-void tcp_skb_mark_lost_uncond_verify(struct tcp_sock *tp, struct sk_buff *skb)
+static void tcp_skb_mark_lost_uncond_verify(struct tcp_sock *tp,
+					    struct sk_buff *skb)
 {
 	tcp_verify_retransmit_hint(tp, skb);
 
@@ -1236,31 +1233,58 @@ static int tcp_check_dsack(struct sock *sk, struct sk_buff *ack_skb,
 	return dup_sack;
 }
 
+struct tcp_sacktag_state {
+	int reord;
+	int fack_count;
+	int flag;
+};
+
 /* Check if skb is fully within the SACK block. In presence of GSO skbs,
  * the incoming SACK may not exactly match but we can find smaller MSS
  * aligned portion of it that matches. Therefore we might need to fragment
  * which may fail and creates some hassle (caller must handle error case
  * returns).
+ *
+ * FIXME: this could be merged to shift decision code
  */
 static int tcp_match_skb_to_sack(struct sock *sk, struct sk_buff *skb,
 				 u32 start_seq, u32 end_seq)
 {
 	int in_sack, err;
 	unsigned int pkt_len;
+	unsigned int mss;
 
 	in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq) &&
 		  !before(end_seq, TCP_SKB_CB(skb)->end_seq);
 
 	if (tcp_skb_pcount(skb) > 1 && !in_sack &&
 	    after(TCP_SKB_CB(skb)->end_seq, start_seq)) {
-
+		mss = tcp_skb_mss(skb);
 		in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq);
 
-		if (!in_sack)
+		if (!in_sack) {
 			pkt_len = start_seq - TCP_SKB_CB(skb)->seq;
-		else
+			if (pkt_len < mss)
+				pkt_len = mss;
+		} else {
 			pkt_len = end_seq - TCP_SKB_CB(skb)->seq;
-		err = tcp_fragment(sk, skb, pkt_len, skb_shinfo(skb)->gso_size);
+			if (pkt_len < mss)
+				return -EINVAL;
+		}
+
+		/* Round if necessary so that SACKs cover only full MSSes
+		 * and/or the remaining small portion (if present)
+		 */
+		if (pkt_len > mss) {
+			unsigned int new_len = (pkt_len / mss) * mss;
+			if (!in_sack && new_len < pkt_len) {
+				new_len += mss;
+				if (new_len > skb->len)
+					return 0;
+			}
+			pkt_len = new_len;
+		}
+		err = tcp_fragment(sk, skb, pkt_len, mss);
 		if (err < 0)
 			return err;
 	}
@@ -1268,24 +1292,25 @@ static int tcp_match_skb_to_sack(struct sock *sk, struct sk_buff *skb,
 	return in_sack;
 }
 
-static int tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
-			   int *reord, int dup_sack, int fack_count)
+static u8 tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
+			  struct tcp_sacktag_state *state,
+			  int dup_sack, int pcount)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 	u8 sacked = TCP_SKB_CB(skb)->sacked;
-	int flag = 0;
+	int fack_count = state->fack_count;
 
 	/* Account D-SACK for retransmitted packet. */
 	if (dup_sack && (sacked & TCPCB_RETRANS)) {
 		if (after(TCP_SKB_CB(skb)->end_seq, tp->undo_marker))
 			tp->undo_retrans--;
 		if (sacked & TCPCB_SACKED_ACKED)
-			*reord = min(fack_count, *reord);
+			state->reord = min(fack_count, state->reord);
 	}
 
 	/* Nothing to do; acked frame is about to be dropped (was ACKed). */
 	if (!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una))
-		return flag;
+		return sacked;
 
 	if (!(sacked & TCPCB_SACKED_ACKED)) {
 		if (sacked & TCPCB_SACKED_RETRANS) {
@@ -1294,10 +1319,9 @@ static int tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
 			 * that retransmission is still in flight.
 			 */
 			if (sacked & TCPCB_LOST) {
-				TCP_SKB_CB(skb)->sacked &=
-					~(TCPCB_LOST|TCPCB_SACKED_RETRANS);
-				tp->lost_out -= tcp_skb_pcount(skb);
-				tp->retrans_out -= tcp_skb_pcount(skb);
+				sacked &= ~(TCPCB_LOST|TCPCB_SACKED_RETRANS);
+				tp->lost_out -= pcount;
+				tp->retrans_out -= pcount;
 			}
 		} else {
 			if (!(sacked & TCPCB_RETRANS)) {
@@ -1306,56 +1330,280 @@ static int tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
 				 */
 				if (before(TCP_SKB_CB(skb)->seq,
 					   tcp_highest_sack_seq(tp)))
-					*reord = min(fack_count, *reord);
+					state->reord = min(fack_count,
+							   state->reord);
 
 				/* SACK enhanced F-RTO (RFC4138; Appendix B) */
 				if (!after(TCP_SKB_CB(skb)->end_seq, tp->frto_highmark))
-					flag |= FLAG_ONLY_ORIG_SACKED;
+					state->flag |= FLAG_ONLY_ORIG_SACKED;
 			}
 
 			if (sacked & TCPCB_LOST) {
-				TCP_SKB_CB(skb)->sacked &= ~TCPCB_LOST;
-				tp->lost_out -= tcp_skb_pcount(skb);
+				sacked &= ~TCPCB_LOST;
+				tp->lost_out -= pcount;
 			}
 		}
 
-		TCP_SKB_CB(skb)->sacked |= TCPCB_SACKED_ACKED;
-		flag |= FLAG_DATA_SACKED;
-		tp->sacked_out += tcp_skb_pcount(skb);
+		sacked |= TCPCB_SACKED_ACKED;
+		state->flag |= FLAG_DATA_SACKED;
+		tp->sacked_out += pcount;
 
-		fack_count += tcp_skb_pcount(skb);
+		fack_count += pcount;
 
 		/* Lost marker hint past SACKed? Tweak RFC3517 cnt */
 		if (!tcp_is_fack(tp) && (tp->lost_skb_hint != NULL) &&
 		    before(TCP_SKB_CB(skb)->seq,
 			   TCP_SKB_CB(tp->lost_skb_hint)->seq))
-			tp->lost_cnt_hint += tcp_skb_pcount(skb);
+			tp->lost_cnt_hint += pcount;
 
 		if (fack_count > tp->fackets_out)
 			tp->fackets_out = fack_count;
-
-		if (!before(TCP_SKB_CB(skb)->seq, tcp_highest_sack_seq(tp)))
-			tcp_advance_highest_sack(sk, skb);
 	}
 
 	/* D-SACK. We can detect redundant retransmission in S|R and plain R
 	 * frames and clear it. undo_retrans is decreased above, L|R frames
 	 * are accounted above as well.
 	 */
-	if (dup_sack && (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS)) {
-		TCP_SKB_CB(skb)->sacked &= ~TCPCB_SACKED_RETRANS;
-		tp->retrans_out -= tcp_skb_pcount(skb);
+	if (dup_sack && (sacked & TCPCB_SACKED_RETRANS)) {
+		sacked &= ~TCPCB_SACKED_RETRANS;
+		tp->retrans_out -= pcount;
 	}
 
-	return flag;
+	return sacked;
+}
+
+static int tcp_shifted_skb(struct sock *sk, struct sk_buff *skb,
+			   struct tcp_sacktag_state *state,
+			   unsigned int pcount, int shifted, int mss)
+{
+	struct tcp_sock *tp = tcp_sk(sk);
+	struct sk_buff *prev = tcp_write_queue_prev(sk, skb);
+
+	BUG_ON(!pcount);
+
+	/* Tweak before seqno plays */
+	if (!tcp_is_fack(tp) && tcp_is_sack(tp) && tp->lost_skb_hint &&
+	    !before(TCP_SKB_CB(tp->lost_skb_hint)->seq, TCP_SKB_CB(skb)->seq))
+		tp->lost_cnt_hint += pcount;
+
+	TCP_SKB_CB(prev)->end_seq += shifted;
+	TCP_SKB_CB(skb)->seq += shifted;
+
+	skb_shinfo(prev)->gso_segs += pcount;
+	BUG_ON(skb_shinfo(skb)->gso_segs < pcount);
+	skb_shinfo(skb)->gso_segs -= pcount;
+
+	/* When we're adding to gso_segs == 1, gso_size will be zero,
+	 * in theory this shouldn't be necessary but as long as DSACK
+	 * code can come after this skb later on it's better to keep
+	 * setting gso_size to something.
+	 */
+	if (!skb_shinfo(prev)->gso_size) {
+		skb_shinfo(prev)->gso_size = mss;
+		skb_shinfo(prev)->gso_type = sk->sk_gso_type;
+	}
+
+	/* CHECKME: To clear or not to clear? Mimics normal skb currently */
+	if (skb_shinfo(skb)->gso_segs <= 1) {
+		skb_shinfo(skb)->gso_size = 0;
+		skb_shinfo(skb)->gso_type = 0;
+	}
+
+	/* We discard results */
+	tcp_sacktag_one(skb, sk, state, 0, pcount);
+
+	/* Difference in this won't matter, both ACKed by the same cumul. ACK */
+	TCP_SKB_CB(prev)->sacked |= (TCP_SKB_CB(skb)->sacked & TCPCB_EVER_RETRANS);
+
+	if (skb->len > 0) {
+		BUG_ON(!tcp_skb_pcount(skb));
+		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SACKSHIFTED);
+		return 0;
+	}
+
+	/* Whole SKB was eaten :-) */
+
+	if (skb == tp->retransmit_skb_hint)
+		tp->retransmit_skb_hint = prev;
+	if (skb == tp->scoreboard_skb_hint)
+		tp->scoreboard_skb_hint = prev;
+	if (skb == tp->lost_skb_hint) {
+		tp->lost_skb_hint = prev;
+		tp->lost_cnt_hint -= tcp_skb_pcount(prev);
+	}
+
+	TCP_SKB_CB(skb)->flags |= TCP_SKB_CB(prev)->flags;
+	if (skb == tcp_highest_sack(sk))
+		tcp_advance_highest_sack(sk, skb);
+
+	tcp_unlink_write_queue(skb, sk);
+	sk_wmem_free_skb(sk, skb);
+
+	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SACKMERGED);
+
+	return 1;
+}
+
+/* I wish gso_size would have a bit more sane initialization than
+ * something-or-zero which complicates things
+ */
+static int tcp_skb_seglen(struct sk_buff *skb)
+{
+	return tcp_skb_pcount(skb) == 1 ? skb->len : tcp_skb_mss(skb);
+}
+
+/* Shifting pages past head area doesn't work */
+static int skb_can_shift(struct sk_buff *skb)
+{
+	return !skb_headlen(skb) && skb_is_nonlinear(skb);
+}
+
+/* Try collapsing SACK blocks spanning across multiple skbs to a single
+ * skb.
+ */
+static struct sk_buff *tcp_shift_skb_data(struct sock *sk, struct sk_buff *skb,
+					  struct tcp_sacktag_state *state,
+					  u32 start_seq, u32 end_seq,
+					  int dup_sack)
+{
+	struct tcp_sock *tp = tcp_sk(sk);
+	struct sk_buff *prev;
+	int mss;
+	int pcount = 0;
+	int len;
+	int in_sack;
+
+	if (!sk_can_gso(sk))
+		goto fallback;
+
+	/* Normally R but no L won't result in plain S */
+	if (!dup_sack &&
+	    (TCP_SKB_CB(skb)->sacked & (TCPCB_LOST|TCPCB_SACKED_RETRANS)) == TCPCB_SACKED_RETRANS)
+		goto fallback;
+	if (!skb_can_shift(skb))
+		goto fallback;
+	/* This frame is about to be dropped (was ACKed). */
+	if (!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una))
+		goto fallback;
+
+	/* Can only happen with delayed DSACK + discard craziness */
+	if (unlikely(skb == tcp_write_queue_head(sk)))
+		goto fallback;
+	prev = tcp_write_queue_prev(sk, skb);
+
+	if ((TCP_SKB_CB(prev)->sacked & TCPCB_TAGBITS) != TCPCB_SACKED_ACKED)
+		goto fallback;
+
+	in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq) &&
+		  !before(end_seq, TCP_SKB_CB(skb)->end_seq);
+
+	if (in_sack) {
+		len = skb->len;
+		pcount = tcp_skb_pcount(skb);
+		mss = tcp_skb_seglen(skb);
+
+		/* TODO: Fix DSACKs to not fragment already SACKed and we can
+		 * drop this restriction as unnecessary
+		 */
+		if (mss != tcp_skb_seglen(prev))
+			goto fallback;
+	} else {
+		if (!after(TCP_SKB_CB(skb)->end_seq, start_seq))
+			goto noop;
+		/* CHECKME: This is non-MSS split case only?, this will
+		 * cause skipped skbs due to advancing loop btw, original
+		 * has that feature too
+		 */
+		if (tcp_skb_pcount(skb) <= 1)
+			goto noop;
+
+		in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq);
+		if (!in_sack) {
+			/* TODO: head merge to next could be attempted here
+			 * if (!after(TCP_SKB_CB(skb)->end_seq, end_seq)),
+			 * though it might not be worth of the additional hassle
+			 *
+			 * ...we can probably just fallback to what was done
+			 * previously. We could try merging non-SACKed ones
+			 * as well but it probably isn't going to buy off
+			 * because later SACKs might again split them, and
+			 * it would make skb timestamp tracking considerably
+			 * harder problem.
+			 */
+			goto fallback;
+		}
+
+		len = end_seq - TCP_SKB_CB(skb)->seq;
+		BUG_ON(len < 0);
+		BUG_ON(len > skb->len);
+
+		/* MSS boundaries should be honoured or else pcount will
+		 * severely break even though it makes things bit trickier.
+		 * Optimize common case to avoid most of the divides
+		 */
+		mss = tcp_skb_mss(skb);
+
+		/* TODO: Fix DSACKs to not fragment already SACKed and we can
+		 * drop this restriction as unnecessary
+		 */
+		if (mss != tcp_skb_seglen(prev))
+			goto fallback;
+
+		if (len == mss) {
+			pcount = 1;
+		} else if (len < mss) {
+			goto noop;
+		} else {
+			pcount = len / mss;
+			len = pcount * mss;
+		}
+	}
+
+	if (!skb_shift(prev, skb, len))
+		goto fallback;
+	if (!tcp_shifted_skb(sk, skb, state, pcount, len, mss))
+		goto out;
+
+	/* Hole filled allows collapsing with the next as well, this is very
+	 * useful when hole on every nth skb pattern happens
+	 */
+	if (prev == tcp_write_queue_tail(sk))
+		goto out;
+	skb = tcp_write_queue_next(sk, prev);
+
+	if (!skb_can_shift(skb) ||
+	    (skb == tcp_send_head(sk)) ||
+	    ((TCP_SKB_CB(skb)->sacked & TCPCB_TAGBITS) != TCPCB_SACKED_ACKED) ||
+	    (mss != tcp_skb_seglen(skb)))
+		goto out;
+
+	len = skb->len;
+	if (skb_shift(prev, skb, len)) {
+		pcount += tcp_skb_pcount(skb);
+		tcp_shifted_skb(sk, skb, state, tcp_skb_pcount(skb), len, mss);
+	}
+
+out:
+	state->fack_count += pcount;
+	return prev;
+
+noop:
+	return skb;
+
+fallback:
+	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SACKSHIFTFALLBACK);
+	return NULL;
 }
 
 static struct sk_buff *tcp_sacktag_walk(struct sk_buff *skb, struct sock *sk,
 					struct tcp_sack_block *next_dup,
+					struct tcp_sacktag_state *state,
 					u32 start_seq, u32 end_seq,
-					int dup_sack_in, int *fack_count,
-					int *reord, int *flag)
+					int dup_sack_in)
 {
+	struct tcp_sock *tp = tcp_sk(sk);
+	struct sk_buff *tmp;
+
 	tcp_for_write_queue_from(skb, sk) {
 		int in_sack = 0;
 		int dup_sack = dup_sack_in;
@@ -1376,17 +1624,42 @@ static struct sk_buff *tcp_sacktag_walk(struct sk_buff *skb, struct sock *sk,
 				dup_sack = 1;
 		}
 
-		if (in_sack <= 0)
-			in_sack = tcp_match_skb_to_sack(sk, skb, start_seq,
-							end_seq);
+		/* skb reference here is a bit tricky to get right, since
+		 * shifting can eat and free both this skb and the next,
+		 * so not even _safe variant of the loop is enough.
+		 */
+		if (in_sack <= 0) {
+			tmp = tcp_shift_skb_data(sk, skb, state,
+						 start_seq, end_seq, dup_sack);
+			if (tmp != NULL) {
+				if (tmp != skb) {
+					skb = tmp;
+					continue;
+				}
+
+				in_sack = 0;
+			} else {
+				in_sack = tcp_match_skb_to_sack(sk, skb,
+								start_seq,
+								end_seq);
+			}
+		}
+
 		if (unlikely(in_sack < 0))
 			break;
 
-		if (in_sack)
-			*flag |= tcp_sacktag_one(skb, sk, reord, dup_sack,
-						 *fack_count);
+		if (in_sack) {
+			TCP_SKB_CB(skb)->sacked = tcp_sacktag_one(skb, sk,
+								  state,
+								  dup_sack,
+								  tcp_skb_pcount(skb));
+
+			if (!before(TCP_SKB_CB(skb)->seq,
+				    tcp_highest_sack_seq(tp)))
+				tcp_advance_highest_sack(sk, skb);
+		}
 
-		*fack_count += tcp_skb_pcount(skb);
+		state->fack_count += tcp_skb_pcount(skb);
 	}
 	return skb;
 }
@@ -1395,16 +1668,17 @@ static struct sk_buff *tcp_sacktag_walk(struct sk_buff *skb, struct sock *sk,
  * a normal way
  */
 static struct sk_buff *tcp_sacktag_skip(struct sk_buff *skb, struct sock *sk,
-					u32 skip_to_seq, int *fack_count)
+					struct tcp_sacktag_state *state,
+					u32 skip_to_seq)
 {
 	tcp_for_write_queue_from(skb, sk) {
 		if (skb == tcp_send_head(sk))
 			break;
 
-		if (!before(TCP_SKB_CB(skb)->end_seq, skip_to_seq))
+		if (after(TCP_SKB_CB(skb)->end_seq, skip_to_seq))
 			break;
 
-		*fack_count += tcp_skb_pcount(skb);
+		state->fack_count += tcp_skb_pcount(skb);
 	}
 	return skb;
 }
@@ -1412,18 +1686,17 @@ static struct sk_buff *tcp_sacktag_skip(struct sk_buff *skb, struct sock *sk,
 static struct sk_buff *tcp_maybe_skipping_dsack(struct sk_buff *skb,
 						struct sock *sk,
 						struct tcp_sack_block *next_dup,
-						u32 skip_to_seq,
-						int *fack_count, int *reord,
-						int *flag)
+						struct tcp_sacktag_state *state,
+						u32 skip_to_seq)
 {
 	if (next_dup == NULL)
 		return skb;
 
 	if (before(next_dup->start_seq, skip_to_seq)) {
-		skb = tcp_sacktag_skip(skb, sk, next_dup->start_seq, fack_count);
-		skb = tcp_sacktag_walk(skb, sk, NULL,
-				     next_dup->start_seq, next_dup->end_seq,
-				     1, fack_count, reord, flag);
+		skb = tcp_sacktag_skip(skb, sk, state, next_dup->start_seq);
+		skb = tcp_sacktag_walk(skb, sk, NULL, state,
+				       next_dup->start_seq, next_dup->end_seq,
+				       1);
 	}
 
 	return skb;
@@ -1445,16 +1718,17 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 	struct tcp_sack_block_wire *sp_wire = (struct tcp_sack_block_wire *)(ptr+2);
 	struct tcp_sack_block sp[TCP_NUM_SACKS];
 	struct tcp_sack_block *cache;
+	struct tcp_sacktag_state state;
 	struct sk_buff *skb;
 	int num_sacks = min(TCP_NUM_SACKS, (ptr[1] - TCPOLEN_SACK_BASE) >> 3);
 	int used_sacks;
-	int reord = tp->packets_out;
-	int flag = 0;
 	int found_dup_sack = 0;
-	int fack_count;
 	int i, j;
 	int first_sack_index;
 
+	state.flag = 0;
+	state.reord = tp->packets_out;
+
 	if (!tp->sacked_out) {
 		if (WARN_ON(tp->fackets_out))
 			tp->fackets_out = 0;
@@ -1464,7 +1738,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 	found_dup_sack = tcp_check_dsack(sk, ack_skb, sp_wire,
 					 num_sacks, prior_snd_una);
 	if (found_dup_sack)
-		flag |= FLAG_DSACKING_ACK;
+		state.flag |= FLAG_DSACKING_ACK;
 
 	/* Eliminate too old ACKs, but take into
 	 * account more or less fresh ones, they can
@@ -1533,7 +1807,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 	}
 
 	skb = tcp_write_queue_head(sk);
-	fack_count = 0;
+	state.fack_count = 0;
 	i = 0;
 
 	if (!tp->sacked_out) {
@@ -1558,7 +1832,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 
 		/* Event "B" in the comment above. */
 		if (after(end_seq, tp->high_seq))
-			flag |= FLAG_DATA_LOST;
+			state.flag |= FLAG_DATA_LOST;
 
 		/* Skip too early cached blocks */
 		while (tcp_sack_cache_ok(tp, cache) &&
@@ -1571,13 +1845,13 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 
 			/* Head todo? */
 			if (before(start_seq, cache->start_seq)) {
-				skb = tcp_sacktag_skip(skb, sk, start_seq,
-						       &fack_count);
+				skb = tcp_sacktag_skip(skb, sk, &state,
+						       start_seq);
 				skb = tcp_sacktag_walk(skb, sk, next_dup,
+						       &state,
 						       start_seq,
 						       cache->start_seq,
-						       dup_sack, &fack_count,
-						       &reord, &flag);
+						       dup_sack);
 			}
 
 			/* Rest of the block already fully processed? */
@@ -1585,9 +1859,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 				goto advance_sp;
 
 			skb = tcp_maybe_skipping_dsack(skb, sk, next_dup,
-						       cache->end_seq,
-						       &fack_count, &reord,
-						       &flag);
+						       &state,
+						       cache->end_seq);
 
 			/* ...tail remains todo... */
 			if (tcp_highest_sack_seq(tp) == cache->end_seq) {
@@ -1595,13 +1868,12 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 				skb = tcp_highest_sack(sk);
 				if (skb == NULL)
 					break;
-				fack_count = tp->fackets_out;
+				state.fack_count = tp->fackets_out;
 				cache++;
 				goto walk;
 			}
 
-			skb = tcp_sacktag_skip(skb, sk, cache->end_seq,
-					       &fack_count);
+			skb = tcp_sacktag_skip(skb, sk, &state, cache->end_seq);
 			/* Check overlap against next cached too (past this one already) */
 			cache++;
 			continue;
@@ -1611,20 +1883,20 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb,
 			skb = tcp_highest_sack(sk);
 			if (skb == NULL)
 				break;
-			fack_count = tp->fackets_out;
+			state.fack_count = tp->fackets_out;
 		}
-		skb = tcp_sacktag_skip(skb, sk, start_seq, &fack_count);
+		skb = tcp_sacktag_skip(skb, sk, &state, start_seq);
 
 walk:
-		skb = tcp_sacktag_walk(skb, sk, next_dup, start_seq, end_seq,
-				       dup_sack, &fack_count, &reord, &flag);
+		skb = tcp_sacktag_walk(skb, sk, next_dup, &state,
+				       start_seq, end_seq, dup_sack);
 
 advance_sp:
 		/* SACK enhanced FRTO (RFC4138, Appendix B): Clearing correct
 		 * due to in-order walk
 		 */
 		if (after(end_seq, tp->frto_highmark))
-			flag &= ~FLAG_ONLY_ORIG_SACKED;
+			state.flag &= ~FLAG_ONLY_ORIG_SACKED;
 
 		i++;
 	}
@@ -1641,10 +1913,10 @@ advance_sp:
 
 	tcp_verify_left_out(tp);
 
-	if ((reord < tp->fackets_out) &&
+	if ((state.reord < tp->fackets_out) &&
 	    ((icsk->icsk_ca_state != TCP_CA_Loss) || tp->undo_marker) &&
 	    (!tp->frto_highmark || after(tp->snd_una, tp->frto_highmark)))
-		tcp_update_reordering(sk, tp->fackets_out - reord, 0);
+		tcp_update_reordering(sk, tp->fackets_out - state.reord, 0);
 
 out:
 
@@ -1654,13 +1926,13 @@ out:
 	WARN_ON((int)tp->retrans_out < 0);
 	WARN_ON((int)tcp_packets_in_flight(tp) < 0);
 #endif
-	return flag;
+	return state.flag;
 }
 
 /* Limits sacked_out so that sum with lost_out isn't ever larger than
  * packets_out. Returns zero if sacked_out adjustement wasn't necessary.
  */
-int tcp_limit_reno_sacked(struct tcp_sock *tp)
+static int tcp_limit_reno_sacked(struct tcp_sock *tp)
 {
 	u32 holes;
 
@@ -2336,9 +2608,9 @@ static void DBGUNDO(struct sock *sk, const char *msg)
 	struct inet_sock *inet = inet_sk(sk);
 
 	if (sk->sk_family == AF_INET) {
-		printk(KERN_DEBUG "Undo %s " NIPQUAD_FMT "/%u c%u l%u ss%u/%u p%u\n",
+		printk(KERN_DEBUG "Undo %s %pI4/%u c%u l%u ss%u/%u p%u\n",
 		       msg,
-		       NIPQUAD(inet->daddr), ntohs(inet->dport),
+		       &inet->daddr, ntohs(inet->dport),
 		       tp->snd_cwnd, tcp_left_out(tp),
 		       tp->snd_ssthresh, tp->prior_ssthresh,
 		       tp->packets_out);
@@ -2346,9 +2618,9 @@ static void DBGUNDO(struct sock *sk, const char *msg)
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 	else if (sk->sk_family == AF_INET6) {
 		struct ipv6_pinfo *np = inet6_sk(sk);
-		printk(KERN_DEBUG "Undo %s " NIP6_FMT "/%u c%u l%u ss%u/%u p%u\n",
+		printk(KERN_DEBUG "Undo %s %pI6/%u c%u l%u ss%u/%u p%u\n",
 		       msg,
-		       NIP6(np->daddr), ntohs(inet->dport),
+		       &np->daddr, ntohs(inet->dport),
 		       tp->snd_cwnd, tcp_left_out(tp),
 		       tp->snd_ssthresh, tp->prior_ssthresh,
 		       tp->packets_out);
@@ -2559,6 +2831,56 @@ static void tcp_mtup_probe_success(struct sock *sk, struct sk_buff *skb)
 	tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
 }
 
+/* Do a simple retransmit without using the backoff mechanisms in
+ * tcp_timer. This is used for path mtu discovery.
+ * The socket is already locked here.
+ */
+void tcp_simple_retransmit(struct sock *sk)
+{
+	const struct inet_connection_sock *icsk = inet_csk(sk);
+	struct tcp_sock *tp = tcp_sk(sk);
+	struct sk_buff *skb;
+	unsigned int mss = tcp_current_mss(sk, 0);
+	u32 prior_lost = tp->lost_out;
+
+	tcp_for_write_queue(skb, sk) {
+		if (skb == tcp_send_head(sk))
+			break;
+		if (tcp_skb_seglen(skb) > mss &&
+		    !(TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)) {
+			if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS) {
+				TCP_SKB_CB(skb)->sacked &= ~TCPCB_SACKED_RETRANS;
+				tp->retrans_out -= tcp_skb_pcount(skb);
+			}
+			tcp_skb_mark_lost_uncond_verify(tp, skb);
+		}
+	}
+
+	tcp_clear_retrans_hints_partial(tp);
+
+	if (prior_lost == tp->lost_out)
+		return;
+
+	if (tcp_is_reno(tp))
+		tcp_limit_reno_sacked(tp);
+
+	tcp_verify_left_out(tp);
+
+	/* Don't muck with the congestion window here.
+	 * Reason is that we do not increase amount of _data_
+	 * in network, but units changed and effective
+	 * cwnd/ssthresh really reduced now.
+	 */
+	if (icsk->icsk_ca_state != TCP_CA_Loss) {
+		tp->high_seq = tp->snd_nxt;
+		tp->snd_ssthresh = tcp_current_ssthresh(sk);
+		tp->prior_ssthresh = 0;
+		tp->undo_marker = 0;
+		tcp_set_ca_state(sk, TCP_CA_Loss);
+	}
+	tcp_xmit_retransmit_queue(sk);
+}
+
 /* Process an event, which can update packets-in-flight not trivially.
  * Main goal of this function is to calculate new estimate for left_out,
  * taking into account both packets sitting in receiver's buffer and
@@ -2730,6 +3052,13 @@ static void tcp_fastretrans_alert(struct sock *sk, int pkts_acked, int flag)
 	tcp_xmit_retransmit_queue(sk);
 }
 
+static void tcp_valid_rtt_meas(struct sock *sk, u32 seq_rtt)
+{
+	tcp_rtt_estimator(sk, seq_rtt);
+	tcp_set_rto(sk);
+	inet_csk(sk)->icsk_backoff = 0;
+}
+
 /* Read draft-ietf-tcplw-high-performance before mucking
  * with this code. (Supersedes RFC1323)
  */
@@ -2751,11 +3080,8 @@ static void tcp_ack_saw_tstamp(struct sock *sk, int flag)
 	 * in window is lost... Voila.	 			--ANK (010210)
 	 */
 	struct tcp_sock *tp = tcp_sk(sk);
-	const __u32 seq_rtt = tcp_time_stamp - tp->rx_opt.rcv_tsecr;
-	tcp_rtt_estimator(sk, seq_rtt);
-	tcp_set_rto(sk);
-	inet_csk(sk)->icsk_backoff = 0;
-	tcp_bound_rto(sk);
+
+	tcp_valid_rtt_meas(sk, tcp_time_stamp - tp->rx_opt.rcv_tsecr);
 }
 
 static void tcp_ack_no_tstamp(struct sock *sk, u32 seq_rtt, int flag)
@@ -2772,10 +3098,7 @@ static void tcp_ack_no_tstamp(struct sock *sk, u32 seq_rtt, int flag)
 	if (flag & FLAG_RETRANS_DATA_ACKED)
 		return;
 
-	tcp_rtt_estimator(sk, seq_rtt);
-	tcp_set_rto(sk);
-	inet_csk(sk)->icsk_backoff = 0;
-	tcp_bound_rto(sk);
+	tcp_valid_rtt_meas(sk, seq_rtt);
 }
 
 static inline void tcp_ack_update_rtt(struct sock *sk, const int flag,
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 5c8fa7f..1017248 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -97,11 +97,7 @@ struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr)
 }
 #endif
 
-struct inet_hashinfo __cacheline_aligned tcp_hashinfo = {
-	.lhash_lock  = __RW_LOCK_UNLOCKED(tcp_hashinfo.lhash_lock),
-	.lhash_users = ATOMIC_INIT(0),
-	.lhash_wait  = __WAIT_QUEUE_HEAD_INITIALIZER(tcp_hashinfo.lhash_wait),
-};
+struct inet_hashinfo tcp_hashinfo;
 
 static inline __u32 tcp_v4_init_sequence(struct sk_buff *skb)
 {
@@ -492,7 +488,7 @@ void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)
 		skb->csum_offset = offsetof(struct tcphdr, check);
 	} else {
 		th->check = tcp_v4_check(len, inet->saddr, inet->daddr,
-					 csum_partial((char *)th,
+					 csum_partial(th,
 						      th->doff << 2,
 						      skb->csum));
 	}
@@ -726,7 +722,7 @@ static int __tcp_v4_send_synack(struct sock *sk, struct request_sock *req,
 		th->check = tcp_v4_check(skb->len,
 					 ireq->loc_addr,
 					 ireq->rmt_addr,
-					 csum_partial((char *)th, skb->len,
+					 csum_partial(th, skb->len,
 						      skb->csum));
 
 		err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr,
@@ -1139,10 +1135,9 @@ static int tcp_v4_inbound_md5_hash(struct sock *sk, struct sk_buff *skb)
 
 	if (genhash || memcmp(hash_location, newhash, 16) != 0) {
 		if (net_ratelimit()) {
-			printk(KERN_INFO "MD5 Hash failed for "
-			       "(" NIPQUAD_FMT ", %d)->(" NIPQUAD_FMT ", %d)%s\n",
-			       NIPQUAD(iph->saddr), ntohs(th->source),
-			       NIPQUAD(iph->daddr), ntohs(th->dest),
+			printk(KERN_INFO "MD5 Hash failed for (%pI4, %d)->(%pI4, %d)%s\n",
+			       &iph->saddr, ntohs(th->source),
+			       &iph->daddr, ntohs(th->dest),
 			       genhash ? " tcp_v4_calc_md5_hash failed" : "");
 		}
 		return 1;
@@ -1297,10 +1292,8 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 			 * to destinations, already remembered
 			 * to the moment of synflood.
 			 */
-			LIMIT_NETDEBUG(KERN_DEBUG "TCP: drop open "
-				       "request from " NIPQUAD_FMT "/%u\n",
-				       NIPQUAD(saddr),
-				       ntohs(tcp_hdr(skb)->source));
+			LIMIT_NETDEBUG(KERN_DEBUG "TCP: drop open request from %pI4/%u\n",
+				       &saddr, ntohs(tcp_hdr(skb)->source));
 			goto drop_and_release;
 		}
 
@@ -1804,7 +1797,7 @@ static int tcp_v4_init_sock(struct sock *sk)
 	sk->sk_sndbuf = sysctl_tcp_wmem[1];
 	sk->sk_rcvbuf = sysctl_tcp_rmem[1];
 
-	atomic_inc(&tcp_sockets_allocated);
+	percpu_counter_inc(&tcp_sockets_allocated);
 
 	return 0;
 }
@@ -1852,7 +1845,7 @@ void tcp_v4_destroy_sock(struct sock *sk)
 		sk->sk_sndmsg_page = NULL;
 	}
 
-	atomic_dec(&tcp_sockets_allocated);
+	percpu_counter_dec(&tcp_sockets_allocated);
 }
 
 EXPORT_SYMBOL(tcp_v4_destroy_sock);
@@ -1860,32 +1853,35 @@ EXPORT_SYMBOL(tcp_v4_destroy_sock);
 #ifdef CONFIG_PROC_FS
 /* Proc filesystem TCP sock list dumping. */
 
-static inline struct inet_timewait_sock *tw_head(struct hlist_head *head)
+static inline struct inet_timewait_sock *tw_head(struct hlist_nulls_head *head)
 {
-	return hlist_empty(head) ? NULL :
+	return hlist_nulls_empty(head) ? NULL :
 		list_entry(head->first, struct inet_timewait_sock, tw_node);
 }
 
 static inline struct inet_timewait_sock *tw_next(struct inet_timewait_sock *tw)
 {
-	return tw->tw_node.next ?
-		hlist_entry(tw->tw_node.next, typeof(*tw), tw_node) : NULL;
+	return !is_a_nulls(tw->tw_node.next) ?
+		hlist_nulls_entry(tw->tw_node.next, typeof(*tw), tw_node) : NULL;
 }
 
 static void *listening_get_next(struct seq_file *seq, void *cur)
 {
 	struct inet_connection_sock *icsk;
-	struct hlist_node *node;
+	struct hlist_nulls_node *node;
 	struct sock *sk = cur;
-	struct tcp_iter_state* st = seq->private;
+	struct inet_listen_hashbucket *ilb;
+	struct tcp_iter_state *st = seq->private;
 	struct net *net = seq_file_net(seq);
 
 	if (!sk) {
 		st->bucket = 0;
-		sk = sk_head(&tcp_hashinfo.listening_hash[0]);
+		ilb = &tcp_hashinfo.listening_hash[0];
+		spin_lock_bh(&ilb->lock);
+		sk = sk_nulls_head(&ilb->head);
 		goto get_sk;
 	}
-
+	ilb = &tcp_hashinfo.listening_hash[st->bucket];
 	++st->num;
 
 	if (st->state == TCP_SEQ_STATE_OPENREQ) {
@@ -1918,7 +1914,7 @@ get_req:
 		sk = sk_next(sk);
 	}
 get_sk:
-	sk_for_each_from(sk, node) {
+	sk_nulls_for_each_from(sk, node) {
 		if (sk->sk_family == st->family && net_eq(sock_net(sk), net)) {
 			cur = sk;
 			goto out;
@@ -1935,8 +1931,11 @@ start_req:
 		}
 		read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
 	}
+	spin_unlock_bh(&ilb->lock);
 	if (++st->bucket < INET_LHTABLE_SIZE) {
-		sk = sk_head(&tcp_hashinfo.listening_hash[st->bucket]);
+		ilb = &tcp_hashinfo.listening_hash[st->bucket];
+		spin_lock_bh(&ilb->lock);
+		sk = sk_nulls_head(&ilb->head);
 		goto get_sk;
 	}
 	cur = NULL;
@@ -1957,28 +1956,28 @@ static void *listening_get_idx(struct seq_file *seq, loff_t *pos)
 
 static inline int empty_bucket(struct tcp_iter_state *st)
 {
-	return hlist_empty(&tcp_hashinfo.ehash[st->bucket].chain) &&
-		hlist_empty(&tcp_hashinfo.ehash[st->bucket].twchain);
+	return hlist_nulls_empty(&tcp_hashinfo.ehash[st->bucket].chain) &&
+		hlist_nulls_empty(&tcp_hashinfo.ehash[st->bucket].twchain);
 }
 
 static void *established_get_first(struct seq_file *seq)
 {
-	struct tcp_iter_state* st = seq->private;
+	struct tcp_iter_state *st = seq->private;
 	struct net *net = seq_file_net(seq);
 	void *rc = NULL;
 
 	for (st->bucket = 0; st->bucket < tcp_hashinfo.ehash_size; ++st->bucket) {
 		struct sock *sk;
-		struct hlist_node *node;
+		struct hlist_nulls_node *node;
 		struct inet_timewait_sock *tw;
-		rwlock_t *lock = inet_ehash_lockp(&tcp_hashinfo, st->bucket);
+		spinlock_t *lock = inet_ehash_lockp(&tcp_hashinfo, st->bucket);
 
 		/* Lockless fast path for the common case of empty buckets */
 		if (empty_bucket(st))
 			continue;
 
-		read_lock_bh(lock);
-		sk_for_each(sk, node, &tcp_hashinfo.ehash[st->bucket].chain) {
+		spin_lock_bh(lock);
+		sk_nulls_for_each(sk, node, &tcp_hashinfo.ehash[st->bucket].chain) {
 			if (sk->sk_family != st->family ||
 			    !net_eq(sock_net(sk), net)) {
 				continue;
@@ -1996,7 +1995,7 @@ static void *established_get_first(struct seq_file *seq)
 			rc = tw;
 			goto out;
 		}
-		read_unlock_bh(lock);
+		spin_unlock_bh(lock);
 		st->state = TCP_SEQ_STATE_ESTABLISHED;
 	}
 out:
@@ -2007,8 +2006,8 @@ static void *established_get_next(struct seq_file *seq, void *cur)
 {
 	struct sock *sk = cur;
 	struct inet_timewait_sock *tw;
-	struct hlist_node *node;
-	struct tcp_iter_state* st = seq->private;
+	struct hlist_nulls_node *node;
+	struct tcp_iter_state *st = seq->private;
 	struct net *net = seq_file_net(seq);
 
 	++st->num;
@@ -2024,7 +2023,7 @@ get_tw:
 			cur = tw;
 			goto out;
 		}
-		read_unlock_bh(inet_ehash_lockp(&tcp_hashinfo, st->bucket));
+		spin_unlock_bh(inet_ehash_lockp(&tcp_hashinfo, st->bucket));
 		st->state = TCP_SEQ_STATE_ESTABLISHED;
 
 		/* Look for next non empty bucket */
@@ -2034,12 +2033,12 @@ get_tw:
 		if (st->bucket >= tcp_hashinfo.ehash_size)
 			return NULL;
 
-		read_lock_bh(inet_ehash_lockp(&tcp_hashinfo, st->bucket));
-		sk = sk_head(&tcp_hashinfo.ehash[st->bucket].chain);
+		spin_lock_bh(inet_ehash_lockp(&tcp_hashinfo, st->bucket));
+		sk = sk_nulls_head(&tcp_hashinfo.ehash[st->bucket].chain);
 	} else
-		sk = sk_next(sk);
+		sk = sk_nulls_next(sk);
 
-	sk_for_each_from(sk, node) {
+	sk_nulls_for_each_from(sk, node) {
 		if (sk->sk_family == st->family && net_eq(sock_net(sk), net))
 			goto found;
 	}
@@ -2067,14 +2066,12 @@ static void *established_get_idx(struct seq_file *seq, loff_t pos)
 static void *tcp_get_idx(struct seq_file *seq, loff_t pos)
 {
 	void *rc;
-	struct tcp_iter_state* st = seq->private;
+	struct tcp_iter_state *st = seq->private;
 
-	inet_listen_lock(&tcp_hashinfo);
 	st->state = TCP_SEQ_STATE_LISTENING;
 	rc	  = listening_get_idx(seq, &pos);
 
 	if (!rc) {
-		inet_listen_unlock(&tcp_hashinfo);
 		st->state = TCP_SEQ_STATE_ESTABLISHED;
 		rc	  = established_get_idx(seq, pos);
 	}
@@ -2084,7 +2081,7 @@ static void *tcp_get_idx(struct seq_file *seq, loff_t pos)
 
 static void *tcp_seq_start(struct seq_file *seq, loff_t *pos)
 {
-	struct tcp_iter_state* st = seq->private;
+	struct tcp_iter_state *st = seq->private;
 	st->state = TCP_SEQ_STATE_LISTENING;
 	st->num = 0;
 	return *pos ? tcp_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
@@ -2093,7 +2090,7 @@ static void *tcp_seq_start(struct seq_file *seq, loff_t *pos)
 static void *tcp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
 	void *rc = NULL;
-	struct tcp_iter_state* st;
+	struct tcp_iter_state *st;
 
 	if (v == SEQ_START_TOKEN) {
 		rc = tcp_get_idx(seq, 0);
@@ -2106,7 +2103,6 @@ static void *tcp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 	case TCP_SEQ_STATE_LISTENING:
 		rc = listening_get_next(seq, v);
 		if (!rc) {
-			inet_listen_unlock(&tcp_hashinfo);
 			st->state = TCP_SEQ_STATE_ESTABLISHED;
 			rc	  = established_get_first(seq);
 		}
@@ -2123,7 +2119,7 @@ out:
 
 static void tcp_seq_stop(struct seq_file *seq, void *v)
 {
-	struct tcp_iter_state* st = seq->private;
+	struct tcp_iter_state *st = seq->private;
 
 	switch (st->state) {
 	case TCP_SEQ_STATE_OPENREQ:
@@ -2133,12 +2129,12 @@ static void tcp_seq_stop(struct seq_file *seq, void *v)
 		}
 	case TCP_SEQ_STATE_LISTENING:
 		if (v != SEQ_START_TOKEN)
-			inet_listen_unlock(&tcp_hashinfo);
+			spin_unlock_bh(&tcp_hashinfo.listening_hash[st->bucket].lock);
 		break;
 	case TCP_SEQ_STATE_TIME_WAIT:
 	case TCP_SEQ_STATE_ESTABLISHED:
 		if (v)
-			read_unlock_bh(inet_ehash_lockp(&tcp_hashinfo, st->bucket));
+			spin_unlock_bh(inet_ehash_lockp(&tcp_hashinfo, st->bucket));
 		break;
 	}
 }
@@ -2284,7 +2280,7 @@ static void get_timewait4_sock(struct inet_timewait_sock *tw,
 
 static int tcp4_seq_show(struct seq_file *seq, void *v)
 {
-	struct tcp_iter_state* st;
+	struct tcp_iter_state *st;
 	int len;
 
 	if (v == SEQ_START_TOKEN) {
@@ -2350,6 +2346,41 @@ void tcp4_proc_exit(void)
 }
 #endif /* CONFIG_PROC_FS */
 
+struct sk_buff **tcp4_gro_receive(struct sk_buff **head, struct sk_buff *skb)
+{
+	struct iphdr *iph = ip_hdr(skb);
+
+	switch (skb->ip_summed) {
+	case CHECKSUM_COMPLETE:
+		if (!tcp_v4_check(skb->len, iph->saddr, iph->daddr,
+				  skb->csum)) {
+			skb->ip_summed = CHECKSUM_UNNECESSARY;
+			break;
+		}
+
+		/* fall through */
+	case CHECKSUM_NONE:
+		NAPI_GRO_CB(skb)->flush = 1;
+		return NULL;
+	}
+
+	return tcp_gro_receive(head, skb);
+}
+EXPORT_SYMBOL(tcp4_gro_receive);
+
+int tcp4_gro_complete(struct sk_buff *skb)
+{
+	struct iphdr *iph = ip_hdr(skb);
+	struct tcphdr *th = tcp_hdr(skb);
+
+	th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb),
+				  iph->saddr, iph->daddr, 0);
+	skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
+
+	return tcp_gro_complete(skb);
+}
+EXPORT_SYMBOL(tcp4_gro_complete);
+
 struct proto tcp_prot = {
 	.name			= "TCP",
 	.owner			= THIS_MODULE,
@@ -2378,6 +2409,7 @@ struct proto tcp_prot = {
 	.sysctl_rmem		= sysctl_tcp_rmem,
 	.max_header		= MAX_TCP_HEADER,
 	.obj_size		= sizeof(struct tcp_sock),
+	.slab_flags		= SLAB_DESTROY_BY_RCU,
 	.twsk_prot		= &tcp_timewait_sock_ops,
 	.rsk_prot		= &tcp_request_sock_ops,
 	.h.hashinfo		= &tcp_hashinfo,
@@ -2407,6 +2439,7 @@ static struct pernet_operations __net_initdata tcp_sk_ops = {
 
 void __init tcp_v4_init(void)
 {
+	inet_hashinfo_init(&tcp_hashinfo);
 	if (register_pernet_device(&tcp_sk_ops))
 		panic("Failed to create the TCP control socket.\n");
 }
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index 779f2e9..f67effb 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -491,7 +491,7 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
  *	as a request_sock.
  */
 
-struct sock *tcp_check_req(struct sock *sk,struct sk_buff *skb,
+struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
 			   struct request_sock *req,
 			   struct request_sock **prev)
 {
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index fe3b4bd..557fe16 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -42,7 +42,7 @@
 /* People can turn this off for buggy TCP's found in printers etc. */
 int sysctl_tcp_retrans_collapse __read_mostly = 1;
 
-/* People can turn this on to  work with those rare, broken TCPs that
+/* People can turn this on to work with those rare, broken TCPs that
  * interpret the window field as a signed quantity.
  */
 int sysctl_tcp_workaround_signed_windows __read_mostly = 0;
@@ -484,7 +484,7 @@ static unsigned tcp_syn_options(struct sock *sk, struct sk_buff *skb,
 	}
 	if (likely(sysctl_tcp_window_scaling)) {
 		opts->ws = tp->rx_opt.rcv_wscale;
-		if(likely(opts->ws))
+		if (likely(opts->ws))
 			size += TCPOLEN_WSCALE_ALIGNED;
 	}
 	if (likely(sysctl_tcp_sack)) {
@@ -526,7 +526,7 @@ static unsigned tcp_synack_options(struct sock *sk,
 
 	if (likely(ireq->wscale_ok)) {
 		opts->ws = ireq->rcv_wscale;
-		if(likely(opts->ws))
+		if (likely(opts->ws))
 			size += TCPOLEN_WSCALE_ALIGNED;
 	}
 	if (likely(doing_ts)) {
@@ -663,10 +663,14 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
 	th->urg_ptr		= 0;
 
 	/* The urg_mode check is necessary during a below snd_una win probe */
-	if (unlikely(tcp_urg_mode(tp) &&
-		     between(tp->snd_up, tcb->seq + 1, tcb->seq + 0xFFFF))) {
-		th->urg_ptr		= htons(tp->snd_up - tcb->seq);
-		th->urg			= 1;
+	if (unlikely(tcp_urg_mode(tp))) {
+		if (between(tp->snd_up, tcb->seq + 1, tcb->seq + 0xFFFF)) {
+			th->urg_ptr = htons(tp->snd_up - tcb->seq);
+			th->urg = 1;
+		} else if (after(tcb->seq + 0xFFFF, tp->snd_nxt)) {
+			th->urg_ptr = 0xFFFF;
+			th->urg = 1;
+		}
 	}
 
 	tcp_options_write((__be32 *)(th + 1), tp, &opts, &md5_hash_location);
@@ -1168,7 +1172,7 @@ static int tcp_init_tso_segs(struct sock *sk, struct sk_buff *skb,
 
 static inline int tcp_minshall_check(const struct tcp_sock *tp)
 {
-	return after(tp->snd_sml,tp->snd_una) &&
+	return after(tp->snd_sml, tp->snd_una) &&
 		!after(tp->snd_sml, tp->snd_nxt);
 }
 
@@ -1334,7 +1338,7 @@ static int tcp_tso_should_defer(struct sock *sk, struct sk_buff *skb)
 
 	/* Defer for less than two clock ticks. */
 	if (tp->tso_deferred &&
-	    ((jiffies << 1) >> 1) - (tp->tso_deferred >> 1) > 1)
+	    (((u32)jiffies << 1) >> 1) - (tp->tso_deferred >> 1) > 1)
 		goto send_now;
 
 	in_flight = tcp_packets_in_flight(tp);
@@ -1519,7 +1523,8 @@ static int tcp_mtu_probe(struct sock *sk)
  * Returns 1, if no segments are in flight and we have queued segments, but
  * cannot send anything now because of SWS or another problem.
  */
-static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle)
+static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
+			  int push_one, gfp_t gfp)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct sk_buff *skb;
@@ -1527,20 +1532,16 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle)
 	int cwnd_quota;
 	int result;
 
-	/* If we are closed, the bytes will have to remain here.
-	 * In time closedown will finish, we empty the write queue and all
-	 * will be happy.
-	 */
-	if (unlikely(sk->sk_state == TCP_CLOSE))
-		return 0;
-
 	sent_pkts = 0;
 
-	/* Do MTU probing. */
-	if ((result = tcp_mtu_probe(sk)) == 0) {
-		return 0;
-	} else if (result > 0) {
-		sent_pkts = 1;
+	if (!push_one) {
+		/* Do MTU probing. */
+		result = tcp_mtu_probe(sk);
+		if (!result) {
+			return 0;
+		} else if (result > 0) {
+			sent_pkts = 1;
+		}
 	}
 
 	while ((skb = tcp_send_head(sk))) {
@@ -1562,7 +1563,7 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle)
 						      nonagle : TCP_NAGLE_PUSH))))
 				break;
 		} else {
-			if (tcp_tso_should_defer(sk, skb))
+			if (!push_one && tcp_tso_should_defer(sk, skb))
 				break;
 		}
 
@@ -1577,7 +1578,7 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle)
 
 		TCP_SKB_CB(skb)->when = tcp_time_stamp;
 
-		if (unlikely(tcp_transmit_skb(sk, skb, 1, GFP_ATOMIC)))
+		if (unlikely(tcp_transmit_skb(sk, skb, 1, gfp)))
 			break;
 
 		/* Advance the send_head.  This one is sent out.
@@ -1587,6 +1588,9 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle)
 
 		tcp_minshall_update(tp, mss_now, skb);
 		sent_pkts++;
+
+		if (push_one)
+			break;
 	}
 
 	if (likely(sent_pkts)) {
@@ -1605,10 +1609,18 @@ void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
 {
 	struct sk_buff *skb = tcp_send_head(sk);
 
-	if (skb) {
-		if (tcp_write_xmit(sk, cur_mss, nonagle))
-			tcp_check_probe_timer(sk);
-	}
+	if (!skb)
+		return;
+
+	/* If we are closed, the bytes will have to remain here.
+	 * In time closedown will finish, we empty the write queue and
+	 * all will be happy.
+	 */
+	if (unlikely(sk->sk_state == TCP_CLOSE))
+		return;
+
+	if (tcp_write_xmit(sk, cur_mss, nonagle, 0, GFP_ATOMIC))
+		tcp_check_probe_timer(sk);
 }
 
 /* Send _single_ skb sitting at the send head. This function requires
@@ -1616,38 +1628,11 @@ void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
  */
 void tcp_push_one(struct sock *sk, unsigned int mss_now)
 {
-	struct tcp_sock *tp = tcp_sk(sk);
 	struct sk_buff *skb = tcp_send_head(sk);
-	unsigned int tso_segs, cwnd_quota;
 
 	BUG_ON(!skb || skb->len < mss_now);
 
-	tso_segs = tcp_init_tso_segs(sk, skb, mss_now);
-	cwnd_quota = tcp_snd_test(sk, skb, mss_now, TCP_NAGLE_PUSH);
-
-	if (likely(cwnd_quota)) {
-		unsigned int limit;
-
-		BUG_ON(!tso_segs);
-
-		limit = mss_now;
-		if (tso_segs > 1 && !tcp_urg_mode(tp))
-			limit = tcp_mss_split_point(sk, skb, mss_now,
-						    cwnd_quota);
-
-		if (skb->len > limit &&
-		    unlikely(tso_fragment(sk, skb, limit, mss_now)))
-			return;
-
-		/* Send it out now. */
-		TCP_SKB_CB(skb)->when = tcp_time_stamp;
-
-		if (likely(!tcp_transmit_skb(sk, skb, 1, sk->sk_allocation))) {
-			tcp_event_new_data_sent(sk, skb);
-			tcp_cwnd_validate(sk);
-			return;
-		}
-	}
+	tcp_write_xmit(sk, mss_now, TCP_NAGLE_PUSH, 1, sk->sk_allocation);
 }
 
 /* This function returns the amount that we can raise the
@@ -1767,46 +1752,22 @@ u32 __tcp_select_window(struct sock *sk)
 	return window;
 }
 
-/* Attempt to collapse two adjacent SKB's during retransmission. */
-static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb,
-				     int mss_now)
+/* Collapses two adjacent SKB's during retransmission. */
+static void tcp_collapse_retrans(struct sock *sk, struct sk_buff *skb)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct sk_buff *next_skb = tcp_write_queue_next(sk, skb);
 	int skb_size, next_skb_size;
 	u16 flags;
 
-	/* The first test we must make is that neither of these two
-	 * SKB's are still referenced by someone else.
-	 */
-	if (skb_cloned(skb) || skb_cloned(next_skb))
-		return;
-
 	skb_size = skb->len;
 	next_skb_size = next_skb->len;
 	flags = TCP_SKB_CB(skb)->flags;
 
-	/* Also punt if next skb has been SACK'd. */
-	if (TCP_SKB_CB(next_skb)->sacked & TCPCB_SACKED_ACKED)
-		return;
-
-	/* Next skb is out of window. */
-	if (after(TCP_SKB_CB(next_skb)->end_seq, tcp_wnd_end(tp)))
-		return;
-
-	/* Punt if not enough space exists in the first SKB for
-	 * the data in the second, or the total combined payload
-	 * would exceed the MSS.
-	 */
-	if ((next_skb_size > skb_tailroom(skb)) ||
-	    ((skb_size + next_skb_size) > mss_now))
-		return;
-
 	BUG_ON(tcp_skb_pcount(skb) != 1 || tcp_skb_pcount(next_skb) != 1);
 
 	tcp_highest_sack_combine(sk, next_skb, skb);
 
-	/* Ok.	We will be able to collapse the packet. */
 	tcp_unlink_write_queue(next_skb, sk);
 
 	skb_copy_from_linear_data(next_skb, skb_put(skb, next_skb_size),
@@ -1848,54 +1809,60 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb,
 	sk_wmem_free_skb(sk, next_skb);
 }
 
-/* Do a simple retransmit without using the backoff mechanisms in
- * tcp_timer. This is used for path mtu discovery.
- * The socket is already locked here.
- */
-void tcp_simple_retransmit(struct sock *sk)
+static int tcp_can_collapse(struct sock *sk, struct sk_buff *skb)
+{
+	if (tcp_skb_pcount(skb) > 1)
+		return 0;
+	/* TODO: SACK collapsing could be used to remove this condition */
+	if (skb_shinfo(skb)->nr_frags != 0)
+		return 0;
+	if (skb_cloned(skb))
+		return 0;
+	if (skb == tcp_send_head(sk))
+		return 0;
+	/* Some heurestics for collapsing over SACK'd could be invented */
+	if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)
+		return 0;
+
+	return 1;
+}
+
+static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *to,
+				     int space)
 {
-	const struct inet_connection_sock *icsk = inet_csk(sk);
 	struct tcp_sock *tp = tcp_sk(sk);
-	struct sk_buff *skb;
-	unsigned int mss = tcp_current_mss(sk, 0);
-	u32 prior_lost = tp->lost_out;
+	struct sk_buff *skb = to, *tmp;
+	int first = 1;
 
-	tcp_for_write_queue(skb, sk) {
-		if (skb == tcp_send_head(sk))
+	if (!sysctl_tcp_retrans_collapse)
+		return;
+	if (TCP_SKB_CB(skb)->flags & TCPCB_FLAG_SYN)
+		return;
+
+	tcp_for_write_queue_from_safe(skb, tmp, sk) {
+		if (!tcp_can_collapse(sk, skb))
 			break;
-		if (skb->len > mss &&
-		    !(TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)) {
-			if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS) {
-				TCP_SKB_CB(skb)->sacked &= ~TCPCB_SACKED_RETRANS;
-				tp->retrans_out -= tcp_skb_pcount(skb);
-			}
-			tcp_skb_mark_lost_uncond_verify(tp, skb);
-		}
-	}
 
-	tcp_clear_retrans_hints_partial(tp);
+		space -= skb->len;
 
-	if (prior_lost == tp->lost_out)
-		return;
+		if (first) {
+			first = 0;
+			continue;
+		}
 
-	if (tcp_is_reno(tp))
-		tcp_limit_reno_sacked(tp);
+		if (space < 0)
+			break;
+		/* Punt if not enough space exists in the first SKB for
+		 * the data in the second
+		 */
+		if (skb->len > skb_tailroom(to))
+			break;
 
-	tcp_verify_left_out(tp);
+		if (after(TCP_SKB_CB(skb)->end_seq, tcp_wnd_end(tp)))
+			break;
 
-	/* Don't muck with the congestion window here.
-	 * Reason is that we do not increase amount of _data_
-	 * in network, but units changed and effective
-	 * cwnd/ssthresh really reduced now.
-	 */
-	if (icsk->icsk_ca_state != TCP_CA_Loss) {
-		tp->high_seq = tp->snd_nxt;
-		tp->snd_ssthresh = tcp_current_ssthresh(sk);
-		tp->prior_ssthresh = 0;
-		tp->undo_marker = 0;
-		tcp_set_ca_state(sk, TCP_CA_Loss);
+		tcp_collapse_retrans(sk, to);
 	}
-	tcp_xmit_retransmit_queue(sk);
 }
 
 /* This retransmits one SKB.  Policy decisions and retransmit queue
@@ -1947,17 +1914,7 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
 			return -ENOMEM; /* We'll try again later. */
 	}
 
-	/* Collapse two adjacent packets if worthwhile and we can. */
-	if (!(TCP_SKB_CB(skb)->flags & TCPCB_FLAG_SYN) &&
-	    (skb->len < (cur_mss >> 1)) &&
-	    (!tcp_skb_is_last(sk, skb)) &&
-	    (tcp_write_queue_next(sk, skb) != tcp_send_head(sk)) &&
-	    (skb_shinfo(skb)->nr_frags == 0 &&
-	     skb_shinfo(tcp_write_queue_next(sk, skb))->nr_frags == 0) &&
-	    (tcp_skb_pcount(skb) == 1 &&
-	     tcp_skb_pcount(tcp_write_queue_next(sk, skb)) == 1) &&
-	    (sysctl_tcp_retrans_collapse != 0))
-		tcp_retrans_try_collapse(sk, skb, cur_mss);
+	tcp_retrans_try_collapse(sk, skb, cur_mss);
 
 	/* Some Solaris stacks overoptimize and ignore the FIN on a
 	 * retransmit when old data is attached.  So strip it off
diff --git a/net/ipv4/tcp_probe.c b/net/ipv4/tcp_probe.c
index 7ddc30f..25524d4 100644
--- a/net/ipv4/tcp_probe.c
+++ b/net/ipv4/tcp_probe.c
@@ -153,12 +153,11 @@ static int tcpprobe_sprint(char *tbuf, int n)
 		= ktime_to_timespec(ktime_sub(p->tstamp, tcp_probe.start));
 
 	return snprintf(tbuf, n,
-			"%lu.%09lu " NIPQUAD_FMT ":%u " NIPQUAD_FMT ":%u"
-			" %d %#x %#x %u %u %u %u\n",
+			"%lu.%09lu %pI4:%u %pI4:%u %d %#x %#x %u %u %u %u\n",
 			(unsigned long) tv.tv_sec,
 			(unsigned long) tv.tv_nsec,
-			NIPQUAD(p->saddr), ntohs(p->sport),
-			NIPQUAD(p->daddr), ntohs(p->dport),
+			&p->saddr, ntohs(p->sport),
+			&p->daddr, ntohs(p->dport),
 			p->length, p->snd_nxt, p->snd_una,
 			p->snd_cwnd, p->ssthresh, p->snd_wnd, p->srtt);
 }
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 6b6dff1..0170e91 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -65,7 +65,7 @@ static void tcp_write_err(struct sock *sk)
 static int tcp_out_of_resources(struct sock *sk, int do_reset)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
-	int orphans = atomic_read(&tcp_orphan_count);
+	int orphans = percpu_counter_read_positive(&tcp_orphan_count);
 
 	/* If peer does not open window for long time, or did not transmit
 	 * anything for long time, penalize it. */
@@ -171,7 +171,7 @@ static int tcp_write_timeout(struct sock *sk)
 
 static void tcp_delack_timer(unsigned long data)
 {
-	struct sock *sk = (struct sock*)data;
+	struct sock *sk = (struct sock *)data;
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct inet_connection_sock *icsk = inet_csk(sk);
 
@@ -299,15 +299,15 @@ static void tcp_retransmit_timer(struct sock *sk)
 #ifdef TCP_DEBUG
 		struct inet_sock *inet = inet_sk(sk);
 		if (sk->sk_family == AF_INET) {
-			LIMIT_NETDEBUG(KERN_DEBUG "TCP: Treason uncloaked! Peer " NIPQUAD_FMT ":%u/%u shrinks window %u:%u. Repaired.\n",
-			       NIPQUAD(inet->daddr), ntohs(inet->dport),
+			LIMIT_NETDEBUG(KERN_DEBUG "TCP: Peer %pI4:%u/%u unexpectedly shrunk window %u:%u (repaired)\n",
+			       &inet->daddr, ntohs(inet->dport),
 			       inet->num, tp->snd_una, tp->snd_nxt);
 		}
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 		else if (sk->sk_family == AF_INET6) {
 			struct ipv6_pinfo *np = inet6_sk(sk);
-			LIMIT_NETDEBUG(KERN_DEBUG "TCP: Treason uncloaked! Peer " NIP6_FMT ":%u/%u shrinks window %u:%u. Repaired.\n",
-			       NIP6(np->daddr), ntohs(inet->dport),
+			LIMIT_NETDEBUG(KERN_DEBUG "TCP: Peer %pI6:%u/%u unexpectedly shrunk window %u:%u (repaired)\n",
+			       &np->daddr, ntohs(inet->dport),
 			       inet->num, tp->snd_una, tp->snd_nxt);
 		}
 #endif
@@ -396,7 +396,7 @@ out:;
 
 static void tcp_write_timer(unsigned long data)
 {
-	struct sock *sk = (struct sock*)data;
+	struct sock *sk = (struct sock *)data;
 	struct inet_connection_sock *icsk = inet_csk(sk);
 	int event;
 
diff --git a/net/ipv4/tcp_yeah.c b/net/ipv4/tcp_yeah.c
index e03b101..9ec843a 100644
--- a/net/ipv4/tcp_yeah.c
+++ b/net/ipv4/tcp_yeah.c
@@ -83,7 +83,7 @@ static void tcp_yeah_cong_avoid(struct sock *sk, u32 ack, u32 in_flight)
 	else if (!yeah->doing_reno_now) {
 		/* Scalable */
 
-		tp->snd_cwnd_cnt+=yeah->pkts_acked;
+		tp->snd_cwnd_cnt += yeah->pkts_acked;
 		if (tp->snd_cwnd_cnt > min(tp->snd_cwnd, TCP_SCALABLE_AI_CNT)){
 			if (tp->snd_cwnd < tp->snd_cwnd_clamp)
 				tp->snd_cwnd++;
@@ -224,7 +224,7 @@ static u32 tcp_yeah_ssthresh(struct sock *sk) {
 
 		reduction = max( reduction, tp->snd_cwnd >> TCP_YEAH_DELTA);
 	} else
-		reduction = max(tp->snd_cwnd>>1,2U);
+		reduction = max(tp->snd_cwnd>>1, 2U);
 
 	yeah->fast_count = 0;
 	yeah->reno_count = max(yeah->reno_count>>1, 2U);
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 98c1fd0..cf5ab05 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -81,6 +81,8 @@
 #include <asm/uaccess.h>
 #include <asm/ioctls.h>
 #include <linux/bootmem.h>
+#include <linux/highmem.h>
+#include <linux/swap.h>
 #include <linux/types.h>
 #include <linux/fcntl.h>
 #include <linux/module.h>
@@ -104,12 +106,8 @@
 #include <net/xfrm.h>
 #include "udp_impl.h"
 
-/*
- *	Snmp MIB for the UDP layer
- */
-
-struct hlist_head udp_hash[UDP_HTABLE_SIZE];
-DEFINE_RWLOCK(udp_hash_lock);
+struct udp_table udp_table;
+EXPORT_SYMBOL(udp_table);
 
 int sysctl_udp_mem[3] __read_mostly;
 int sysctl_udp_rmem_min __read_mostly;
@@ -123,15 +121,15 @@ atomic_t udp_memory_allocated;
 EXPORT_SYMBOL(udp_memory_allocated);
 
 static int udp_lib_lport_inuse(struct net *net, __u16 num,
-			       const struct hlist_head udptable[],
+			       const struct udp_hslot *hslot,
 			       struct sock *sk,
 			       int (*saddr_comp)(const struct sock *sk1,
 						 const struct sock *sk2))
 {
 	struct sock *sk2;
-	struct hlist_node *node;
+	struct hlist_nulls_node *node;
 
-	sk_for_each(sk2, node, &udptable[udp_hashfn(net, num)])
+	sk_nulls_for_each(sk2, node, &hslot->head)
 		if (net_eq(sock_net(sk2), net)			&&
 		    sk2 != sk					&&
 		    sk2->sk_hash == num				&&
@@ -154,12 +152,11 @@ int udp_lib_get_port(struct sock *sk, unsigned short snum,
 		       int (*saddr_comp)(const struct sock *sk1,
 					 const struct sock *sk2 )    )
 {
-	struct hlist_head *udptable = sk->sk_prot->h.udp_hash;
+	struct udp_hslot *hslot;
+	struct udp_table *udptable = sk->sk_prot->h.udp_table;
 	int    error = 1;
 	struct net *net = sock_net(sk);
 
-	write_lock_bh(&udp_hash_lock);
-
 	if (!snum) {
 		int low, high, remaining;
 		unsigned rand;
@@ -171,26 +168,34 @@ int udp_lib_get_port(struct sock *sk, unsigned short snum,
 		rand = net_random();
 		snum = first = rand % remaining + low;
 		rand |= 1;
-		while (udp_lib_lport_inuse(net, snum, udptable, sk,
-					   saddr_comp)) {
+		for (;;) {
+			hslot = &udptable->hash[udp_hashfn(net, snum)];
+			spin_lock_bh(&hslot->lock);
+			if (!udp_lib_lport_inuse(net, snum, hslot, sk, saddr_comp))
+				break;
+			spin_unlock_bh(&hslot->lock);
 			do {
 				snum = snum + rand;
 			} while (snum < low || snum > high);
 			if (snum == first)
 				goto fail;
 		}
-	} else if (udp_lib_lport_inuse(net, snum, udptable, sk, saddr_comp))
-		goto fail;
-
+	} else {
+		hslot = &udptable->hash[udp_hashfn(net, snum)];
+		spin_lock_bh(&hslot->lock);
+		if (udp_lib_lport_inuse(net, snum, hslot, sk, saddr_comp))
+			goto fail_unlock;
+	}
 	inet_sk(sk)->num = snum;
 	sk->sk_hash = snum;
 	if (sk_unhashed(sk)) {
-		sk_add_node(sk, &udptable[udp_hashfn(net, snum)]);
+		sk_nulls_add_node_rcu(sk, &hslot->head);
 		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
 	}
 	error = 0;
+fail_unlock:
+	spin_unlock_bh(&hslot->lock);
 fail:
-	write_unlock_bh(&udp_hash_lock);
 	return error;
 }
 
@@ -208,63 +213,91 @@ int udp_v4_get_port(struct sock *sk, unsigned short snum)
 	return udp_lib_get_port(sk, snum, ipv4_rcv_saddr_equal);
 }
 
+static inline int compute_score(struct sock *sk, struct net *net, __be32 saddr,
+			 unsigned short hnum,
+			 __be16 sport, __be32 daddr, __be16 dport, int dif)
+{
+	int score = -1;
+
+	if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum &&
+			!ipv6_only_sock(sk)) {
+		struct inet_sock *inet = inet_sk(sk);
+
+		score = (sk->sk_family == PF_INET ? 1 : 0);
+		if (inet->rcv_saddr) {
+			if (inet->rcv_saddr != daddr)
+				return -1;
+			score += 2;
+		}
+		if (inet->daddr) {
+			if (inet->daddr != saddr)
+				return -1;
+			score += 2;
+		}
+		if (inet->dport) {
+			if (inet->dport != sport)
+				return -1;
+			score += 2;
+		}
+		if (sk->sk_bound_dev_if) {
+			if (sk->sk_bound_dev_if != dif)
+				return -1;
+			score += 2;
+		}
+	}
+	return score;
+}
+
 /* UDP is nearly always wildcards out the wazoo, it makes no sense to try
  * harder than this. -DaveM
  */
 static struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
 		__be16 sport, __be32 daddr, __be16 dport,
-		int dif, struct hlist_head udptable[])
+		int dif, struct udp_table *udptable)
 {
-	struct sock *sk, *result = NULL;
-	struct hlist_node *node;
+	struct sock *sk, *result;
+	struct hlist_nulls_node *node;
 	unsigned short hnum = ntohs(dport);
-	int badness = -1;
-
-	read_lock(&udp_hash_lock);
-	sk_for_each(sk, node, &udptable[udp_hashfn(net, hnum)]) {
-		struct inet_sock *inet = inet_sk(sk);
-
-		if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum &&
-				!ipv6_only_sock(sk)) {
-			int score = (sk->sk_family == PF_INET ? 1 : 0);
-			if (inet->rcv_saddr) {
-				if (inet->rcv_saddr != daddr)
-					continue;
-				score+=2;
-			}
-			if (inet->daddr) {
-				if (inet->daddr != saddr)
-					continue;
-				score+=2;
-			}
-			if (inet->dport) {
-				if (inet->dport != sport)
-					continue;
-				score+=2;
-			}
-			if (sk->sk_bound_dev_if) {
-				if (sk->sk_bound_dev_if != dif)
-					continue;
-				score+=2;
-			}
-			if (score == 9) {
-				result = sk;
-				break;
-			} else if (score > badness) {
-				result = sk;
-				badness = score;
-			}
+	unsigned int hash = udp_hashfn(net, hnum);
+	struct udp_hslot *hslot = &udptable->hash[hash];
+	int score, badness;
+
+	rcu_read_lock();
+begin:
+	result = NULL;
+	badness = -1;
+	sk_nulls_for_each_rcu(sk, node, &hslot->head) {
+		score = compute_score(sk, net, saddr, hnum, sport,
+				      daddr, dport, dif);
+		if (score > badness) {
+			result = sk;
+			badness = score;
 		}
 	}
-	if (result)
-		sock_hold(result);
-	read_unlock(&udp_hash_lock);
+	/*
+	 * if the nulls value we got at the end of this lookup is
+	 * not the expected one, we must restart lookup.
+	 * We probably met an item that was moved to another chain.
+	 */
+	if (get_nulls_value(node) != hash)
+		goto begin;
+
+	if (result) {
+		if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt)))
+			result = NULL;
+		else if (unlikely(compute_score(result, net, saddr, hnum, sport,
+				  daddr, dport, dif) < badness)) {
+			sock_put(result);
+			goto begin;
+		}
+	}
+	rcu_read_unlock();
 	return result;
 }
 
 static inline struct sock *__udp4_lib_lookup_skb(struct sk_buff *skb,
 						 __be16 sport, __be16 dport,
-						 struct hlist_head udptable[])
+						 struct udp_table *udptable)
 {
 	struct sock *sk;
 	const struct iphdr *iph = ip_hdr(skb);
@@ -280,7 +313,7 @@ static inline struct sock *__udp4_lib_lookup_skb(struct sk_buff *skb,
 struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
 			     __be32 daddr, __be16 dport, int dif)
 {
-	return __udp4_lib_lookup(net, saddr, sport, daddr, dport, dif, udp_hash);
+	return __udp4_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table);
 }
 EXPORT_SYMBOL_GPL(udp4_lib_lookup);
 
@@ -289,11 +322,11 @@ static inline struct sock *udp_v4_mcast_next(struct net *net, struct sock *sk,
 					     __be16 rmt_port, __be32 rmt_addr,
 					     int dif)
 {
-	struct hlist_node *node;
+	struct hlist_nulls_node *node;
 	struct sock *s = sk;
 	unsigned short hnum = ntohs(loc_port);
 
-	sk_for_each_from(s, node) {
+	sk_nulls_for_each_from(s, node) {
 		struct inet_sock *inet = inet_sk(s);
 
 		if (!net_eq(sock_net(s), net)				||
@@ -324,7 +357,7 @@ found:
  * to find the appropriate port.
  */
 
-void __udp4_lib_err(struct sk_buff *skb, u32 info, struct hlist_head udptable[])
+void __udp4_lib_err(struct sk_buff *skb, u32 info, struct udp_table *udptable)
 {
 	struct inet_sock *inet;
 	struct iphdr *iph = (struct iphdr*)skb->data;
@@ -393,7 +426,7 @@ out:
 
 void udp_err(struct sk_buff *skb, u32 info)
 {
-	__udp4_lib_err(skb, info, udp_hash);
+	__udp4_lib_err(skb, info, &udp_table);
 }
 
 /*
@@ -686,7 +719,7 @@ do_append_data:
 	up->len += ulen;
 	getfrag  =  is_udplite ?  udplite_getfrag : ip_generic_getfrag;
 	err = ip_append_data(sk, getfrag, msg->msg_iov, ulen,
-			sizeof(struct udphdr), &ipc, rt,
+			sizeof(struct udphdr), &ipc, &rt,
 			corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
 	if (err)
 		udp_flush_pending_frames(sk);
@@ -935,6 +968,23 @@ int udp_disconnect(struct sock *sk, int flags)
 	return 0;
 }
 
+void udp_lib_unhash(struct sock *sk)
+{
+	if (sk_hashed(sk)) {
+		struct udp_table *udptable = sk->sk_prot->h.udp_table;
+		unsigned int hash = udp_hashfn(sock_net(sk), sk->sk_hash);
+		struct udp_hslot *hslot = &udptable->hash[hash];
+
+		spin_lock_bh(&hslot->lock);
+		if (sk_nulls_del_node_init_rcu(sk)) {
+			inet_sk(sk)->num = 0;
+			sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
+		}
+		spin_unlock_bh(&hslot->lock);
+	}
+}
+EXPORT_SYMBOL(udp_lib_unhash);
+
 static int __udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
 {
 	int is_udplite = IS_UDPLITE(sk);
@@ -1073,13 +1123,14 @@ drop:
 static int __udp4_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
 				    struct udphdr  *uh,
 				    __be32 saddr, __be32 daddr,
-				    struct hlist_head udptable[])
+				    struct udp_table *udptable)
 {
 	struct sock *sk;
+	struct udp_hslot *hslot = &udptable->hash[udp_hashfn(net, ntohs(uh->dest))];
 	int dif;
 
-	read_lock(&udp_hash_lock);
-	sk = sk_head(&udptable[udp_hashfn(net, ntohs(uh->dest))]);
+	spin_lock(&hslot->lock);
+	sk = sk_nulls_head(&hslot->head);
 	dif = skb->dev->ifindex;
 	sk = udp_v4_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif);
 	if (sk) {
@@ -1088,7 +1139,7 @@ static int __udp4_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
 		do {
 			struct sk_buff *skb1 = skb;
 
-			sknext = udp_v4_mcast_next(net, sk_next(sk), uh->dest,
+			sknext = udp_v4_mcast_next(net, sk_nulls_next(sk), uh->dest,
 						   daddr, uh->source, saddr,
 						   dif);
 			if (sknext)
@@ -1105,7 +1156,7 @@ static int __udp4_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
 		} while (sknext);
 	} else
 		kfree_skb(skb);
-	read_unlock(&udp_hash_lock);
+	spin_unlock(&hslot->lock);
 	return 0;
 }
 
@@ -1151,7 +1202,7 @@ static inline int udp4_csum_init(struct sk_buff *skb, struct udphdr *uh,
  *	All we need to do is get the socket, and then do a checksum.
  */
 
-int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
+int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 		   int proto)
 {
 	struct sock *sk;
@@ -1219,13 +1270,13 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
 	return 0;
 
 short_packet:
-	LIMIT_NETDEBUG(KERN_DEBUG "UDP%s: short packet: From " NIPQUAD_FMT ":%u %d/%d to " NIPQUAD_FMT ":%u\n",
+	LIMIT_NETDEBUG(KERN_DEBUG "UDP%s: short packet: From %pI4:%u %d/%d to %pI4:%u\n",
 		       proto == IPPROTO_UDPLITE ? "-Lite" : "",
-		       NIPQUAD(saddr),
+		       &saddr,
 		       ntohs(uh->source),
 		       ulen,
 		       skb->len,
-		       NIPQUAD(daddr),
+		       &daddr,
 		       ntohs(uh->dest));
 	goto drop;
 
@@ -1234,11 +1285,11 @@ csum_error:
 	 * RFC1122: OK.  Discards the bad packet silently (as far as
 	 * the network is concerned, anyway) as per 4.1.3.4 (MUST).
 	 */
-	LIMIT_NETDEBUG(KERN_DEBUG "UDP%s: bad checksum. From " NIPQUAD_FMT ":%u to " NIPQUAD_FMT ":%u ulen %d\n",
+	LIMIT_NETDEBUG(KERN_DEBUG "UDP%s: bad checksum. From %pI4:%u to %pI4:%u ulen %d\n",
 		       proto == IPPROTO_UDPLITE ? "-Lite" : "",
-		       NIPQUAD(saddr),
+		       &saddr,
 		       ntohs(uh->source),
-		       NIPQUAD(daddr),
+		       &daddr,
 		       ntohs(uh->dest),
 		       ulen);
 drop:
@@ -1249,7 +1300,7 @@ drop:
 
 int udp_rcv(struct sk_buff *skb)
 {
-	return __udp4_lib_rcv(skb, udp_hash, IPPROTO_UDP);
+	return __udp4_lib_rcv(skb, &udp_table, IPPROTO_UDP);
 }
 
 void udp_destroy_sock(struct sock *sk)
@@ -1491,7 +1542,8 @@ struct proto udp_prot = {
 	.sysctl_wmem	   = &sysctl_udp_wmem_min,
 	.sysctl_rmem	   = &sysctl_udp_rmem_min,
 	.obj_size	   = sizeof(struct udp_sock),
-	.h.udp_hash	   = udp_hash,
+	.slab_flags	   = SLAB_DESTROY_BY_RCU,
+	.h.udp_table	   = &udp_table,
 #ifdef CONFIG_COMPAT
 	.compat_setsockopt = compat_udp_setsockopt,
 	.compat_getsockopt = compat_udp_getsockopt,
@@ -1501,20 +1553,23 @@ struct proto udp_prot = {
 /* ------------------------------------------------------------------------ */
 #ifdef CONFIG_PROC_FS
 
-static struct sock *udp_get_first(struct seq_file *seq)
+static struct sock *udp_get_first(struct seq_file *seq, int start)
 {
 	struct sock *sk;
 	struct udp_iter_state *state = seq->private;
 	struct net *net = seq_file_net(seq);
 
-	for (state->bucket = 0; state->bucket < UDP_HTABLE_SIZE; ++state->bucket) {
-		struct hlist_node *node;
-		sk_for_each(sk, node, state->hashtable + state->bucket) {
+	for (state->bucket = start; state->bucket < UDP_HTABLE_SIZE; ++state->bucket) {
+		struct hlist_nulls_node *node;
+		struct udp_hslot *hslot = &state->udp_table->hash[state->bucket];
+		spin_lock_bh(&hslot->lock);
+		sk_nulls_for_each(sk, node, &hslot->head) {
 			if (!net_eq(sock_net(sk), net))
 				continue;
 			if (sk->sk_family == state->family)
 				goto found;
 		}
+		spin_unlock_bh(&hslot->lock);
 	}
 	sk = NULL;
 found:
@@ -1527,21 +1582,19 @@ static struct sock *udp_get_next(struct seq_file *seq, struct sock *sk)
 	struct net *net = seq_file_net(seq);
 
 	do {
-		sk = sk_next(sk);
-try_again:
-		;
+		sk = sk_nulls_next(sk);
 	} while (sk && (!net_eq(sock_net(sk), net) || sk->sk_family != state->family));
 
-	if (!sk && ++state->bucket < UDP_HTABLE_SIZE) {
-		sk = sk_head(state->hashtable + state->bucket);
-		goto try_again;
+	if (!sk) {
+		spin_unlock_bh(&state->udp_table->hash[state->bucket].lock);
+		return udp_get_first(seq, state->bucket + 1);
 	}
 	return sk;
 }
 
 static struct sock *udp_get_idx(struct seq_file *seq, loff_t pos)
 {
-	struct sock *sk = udp_get_first(seq);
+	struct sock *sk = udp_get_first(seq, 0);
 
 	if (sk)
 		while (pos && (sk = udp_get_next(seq, sk)) != NULL)
@@ -1550,9 +1603,7 @@ static struct sock *udp_get_idx(struct seq_file *seq, loff_t pos)
 }
 
 static void *udp_seq_start(struct seq_file *seq, loff_t *pos)
-	__acquires(udp_hash_lock)
 {
-	read_lock(&udp_hash_lock);
 	return *pos ? udp_get_idx(seq, *pos-1) : SEQ_START_TOKEN;
 }
 
@@ -1570,9 +1621,11 @@ static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 }
 
 static void udp_seq_stop(struct seq_file *seq, void *v)
-	__releases(udp_hash_lock)
 {
-	read_unlock(&udp_hash_lock);
+	struct udp_iter_state *state = seq->private;
+
+	if (state->bucket < UDP_HTABLE_SIZE)
+		spin_unlock_bh(&state->udp_table->hash[state->bucket].lock);
 }
 
 static int udp_seq_open(struct inode *inode, struct file *file)
@@ -1588,7 +1641,7 @@ static int udp_seq_open(struct inode *inode, struct file *file)
 
 	s = ((struct seq_file *)file->private_data)->private;
 	s->family		= afinfo->family;
-	s->hashtable		= afinfo->hashtable;
+	s->udp_table		= afinfo->udp_table;
 	return err;
 }
 
@@ -1660,7 +1713,7 @@ int udp4_seq_show(struct seq_file *seq, void *v)
 static struct udp_seq_afinfo udp4_seq_afinfo = {
 	.name		= "udp",
 	.family		= AF_INET,
-	.hashtable	= udp_hash,
+	.udp_table	= &udp_table,
 	.seq_fops	= {
 		.owner	=	THIS_MODULE,
 	},
@@ -1695,16 +1748,28 @@ void udp4_proc_exit(void)
 }
 #endif /* CONFIG_PROC_FS */
 
+void __init udp_table_init(struct udp_table *table)
+{
+	int i;
+
+	for (i = 0; i < UDP_HTABLE_SIZE; i++) {
+		INIT_HLIST_NULLS_HEAD(&table->hash[i].head, i);
+		spin_lock_init(&table->hash[i].lock);
+	}
+}
+
 void __init udp_init(void)
 {
-	unsigned long limit;
+	unsigned long nr_pages, limit;
 
+	udp_table_init(&udp_table);
 	/* Set the pressure threshold up by the same strategy of TCP. It is a
 	 * fraction of global memory that is up to 1/2 at 256 MB, decreasing
 	 * toward zero with the amount of memory, with a floor of 128 pages.
 	 */
-	limit = min(nr_all_pages, 1UL<<(28-PAGE_SHIFT)) >> (20-PAGE_SHIFT);
-	limit = (limit * (nr_all_pages >> (20-PAGE_SHIFT))) >> (PAGE_SHIFT-11);
+	nr_pages = totalram_pages - totalhigh_pages;
+	limit = min(nr_pages, 1UL<<(28-PAGE_SHIFT)) >> (20-PAGE_SHIFT);
+	limit = (limit * (nr_pages >> (20-PAGE_SHIFT))) >> (PAGE_SHIFT-11);
 	limit = max(limit, 128UL);
 	sysctl_udp_mem[0] = limit / 4 * 3;
 	sysctl_udp_mem[1] = limit;
@@ -1715,8 +1780,6 @@ void __init udp_init(void)
 }
 
 EXPORT_SYMBOL(udp_disconnect);
-EXPORT_SYMBOL(udp_hash);
-EXPORT_SYMBOL(udp_hash_lock);
 EXPORT_SYMBOL(udp_ioctl);
 EXPORT_SYMBOL(udp_prot);
 EXPORT_SYMBOL(udp_sendmsg);
diff --git a/net/ipv4/udp_impl.h b/net/ipv4/udp_impl.h
index 2e9bad2..9f4a616 100644
--- a/net/ipv4/udp_impl.h
+++ b/net/ipv4/udp_impl.h
@@ -5,8 +5,8 @@
 #include <net/protocol.h>
 #include <net/inet_common.h>
 
-extern int  	__udp4_lib_rcv(struct sk_buff *, struct hlist_head [], int );
-extern void 	__udp4_lib_err(struct sk_buff *, u32, struct hlist_head []);
+extern int  	__udp4_lib_rcv(struct sk_buff *, struct udp_table *, int );
+extern void 	__udp4_lib_err(struct sk_buff *, u32, struct udp_table *);
 
 extern int	udp_v4_get_port(struct sock *sk, unsigned short snum);
 
diff --git a/net/ipv4/udplite.c b/net/ipv4/udplite.c
index 3c80796..c784891 100644
--- a/net/ipv4/udplite.c
+++ b/net/ipv4/udplite.c
@@ -12,16 +12,17 @@
  */
 #include "udp_impl.h"
 
-struct hlist_head 	udplite_hash[UDP_HTABLE_SIZE];
+struct udp_table 	udplite_table;
+EXPORT_SYMBOL(udplite_table);
 
 static int udplite_rcv(struct sk_buff *skb)
 {
-	return __udp4_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
+	return __udp4_lib_rcv(skb, &udplite_table, IPPROTO_UDPLITE);
 }
 
 static void udplite_err(struct sk_buff *skb, u32 info)
 {
-	__udp4_lib_err(skb, info, udplite_hash);
+	__udp4_lib_err(skb, info, &udplite_table);
 }
 
 static	struct net_protocol udplite_protocol = {
@@ -50,7 +51,8 @@ struct proto 	udplite_prot = {
 	.unhash		   = udp_lib_unhash,
 	.get_port	   = udp_v4_get_port,
 	.obj_size	   = sizeof(struct udp_sock),
-	.h.udp_hash	   = udplite_hash,
+	.slab_flags	   = SLAB_DESTROY_BY_RCU,
+	.h.udp_table	   = &udplite_table,
 #ifdef CONFIG_COMPAT
 	.compat_setsockopt = compat_udp_setsockopt,
 	.compat_getsockopt = compat_udp_getsockopt,
@@ -71,7 +73,7 @@ static struct inet_protosw udplite4_protosw = {
 static struct udp_seq_afinfo udplite4_seq_afinfo = {
 	.name		= "udplite",
 	.family		= AF_INET,
-	.hashtable	= udplite_hash,
+	.udp_table 	= &udplite_table,
 	.seq_fops	= {
 		.owner	=	THIS_MODULE,
 	},
@@ -108,6 +110,7 @@ static inline int udplite4_proc_init(void)
 
 void __init udplite4_register(void)
 {
+	udp_table_init(&udplite_table);
 	if (proto_register(&udplite_prot, 1))
 		goto out_register_err;
 
@@ -126,5 +129,4 @@ out_register_err:
 	printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __func__);
 }
 
-EXPORT_SYMBOL(udplite_hash);
 EXPORT_SYMBOL(udplite_prot);
diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index 390dcb1..4ec2162 100644
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -78,7 +78,6 @@ int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
 	struct udphdr *uh;
 	struct iphdr *iph;
 	int iphlen, len;
-	int ret;
 
 	__u8 *udpdata;
 	__be32 *udpdata32;
@@ -152,8 +151,7 @@ int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
 	skb_reset_transport_header(skb);
 
 	/* process ESP */
-	ret = xfrm4_rcv_encap(skb, IPPROTO_ESP, 0, encap_type);
-	return ret;
+	return xfrm4_rcv_encap(skb, IPPROTO_ESP, 0, encap_type);
 
 drop:
 	kfree_skb(skb);
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index c63de0a..2ad24ba 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -18,7 +18,8 @@
 static struct dst_ops xfrm4_dst_ops;
 static struct xfrm_policy_afinfo xfrm4_policy_afinfo;
 
-static struct dst_entry *xfrm4_dst_lookup(int tos, xfrm_address_t *saddr,
+static struct dst_entry *xfrm4_dst_lookup(struct net *net, int tos,
+					  xfrm_address_t *saddr,
 					  xfrm_address_t *daddr)
 {
 	struct flowi fl = {
@@ -36,19 +37,20 @@ static struct dst_entry *xfrm4_dst_lookup(int tos, xfrm_address_t *saddr,
 	if (saddr)
 		fl.fl4_src = saddr->a4;
 
-	err = __ip_route_output_key(&init_net, &rt, &fl);
+	err = __ip_route_output_key(net, &rt, &fl);
 	dst = &rt->u.dst;
 	if (err)
 		dst = ERR_PTR(err);
 	return dst;
 }
 
-static int xfrm4_get_saddr(xfrm_address_t *saddr, xfrm_address_t *daddr)
+static int xfrm4_get_saddr(struct net *net,
+			   xfrm_address_t *saddr, xfrm_address_t *daddr)
 {
 	struct dst_entry *dst;
 	struct rtable *rt;
 
-	dst = xfrm4_dst_lookup(0, NULL, daddr);
+	dst = xfrm4_dst_lookup(net, 0, NULL, daddr);
 	if (IS_ERR(dst))
 		return -EHOSTUNREACH;
 
@@ -65,7 +67,7 @@ __xfrm4_find_bundle(struct flowi *fl, struct xfrm_policy *policy)
 
 	read_lock_bh(&policy->lock);
 	for (dst = policy->bundles; dst; dst = dst->next) {
-		struct xfrm_dst *xdst = (struct xfrm_dst*)dst;
+		struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
 		if (xdst->u.rt.fl.oif == fl->oif &&	/*XXX*/
 		    xdst->u.rt.fl.fl4_dst == fl->fl4_dst &&
 		    xdst->u.rt.fl.fl4_src == fl->fl4_src &&
@@ -187,7 +189,7 @@ _decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
 
 static inline int xfrm4_garbage_collect(struct dst_ops *ops)
 {
-	xfrm4_policy_afinfo.garbage_collect();
+	xfrm4_policy_afinfo.garbage_collect(&init_net);
 	return (atomic_read(&xfrm4_dst_ops.entries) > xfrm4_dst_ops.gc_thresh*2);
 }
 
@@ -246,7 +248,6 @@ static struct dst_ops xfrm4_dst_ops = {
 	.ifdown =		xfrm4_dst_ifdown,
 	.local_out =		__ip_local_out,
 	.gc_thresh =		1024,
-	.entry_size =		sizeof(struct xfrm_dst),
 	.entries =		ATOMIC_INIT(0),
 };
 
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
index 55dc6be..1ef1366 100644
--- a/net/ipv4/xfrm4_state.c
+++ b/net/ipv4/xfrm4_state.c
@@ -13,8 +13,6 @@
 #include <linux/ipsec.h>
 #include <linux/netfilter_ipv4.h>
 
-static struct xfrm_state_afinfo xfrm4_state_afinfo;
-
 static int xfrm4_init_flags(struct xfrm_state *x)
 {
 	if (ipv4_config.no_pmtu_disc)