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

Pull networking updates from David Miller:
 "Highlights:

   1) Steady transitioning of the BPF instructure to a generic spot so
      all kernel subsystems can make use of it, from Alexei Starovoitov.

   2) SFC driver supports busy polling, from Alexandre Rames.

   3) Take advantage of hash table in UDP multicast delivery, from David
      Held.

   4) Lighten locking, in particular by getting rid of the LRU lists, in
      inet frag handling.  From Florian Westphal.

   5) Add support for various RFC6458 control messages in SCTP, from
      Geir Ola Vaagland.

   6) Allow to filter bridge forwarding database dumps by device, from
      Jamal Hadi Salim.

   7) virtio-net also now supports busy polling, from Jason Wang.

   8) Some low level optimization tweaks in pktgen from Jesper Dangaard
      Brouer.

   9) Add support for ipv6 address generation modes, so that userland
      can have some input into the process.  From Jiri Pirko.

  10) Consolidate common TCP connection request code in ipv4 and ipv6,
      from Octavian Purdila.

  11) New ARP packet logger in netfilter, from Pablo Neira Ayuso.

  12) Generic resizable RCU hash table, with intial users in netlink and
      nftables.  From Thomas Graf.

  13) Maintain a name assignment type so that userspace can see where a
      network device name came from (enumerated by kernel, assigned
      explicitly by userspace, etc.) From Tom Gundersen.

  14) Automatic flow label generation on transmit in ipv6, from Tom
      Herbert.

  15) New packet timestamping facilities from Willem de Bruijn, meant to
      assist in measuring latencies going into/out-of the packet
      scheduler, latency from TCP data transmission to ACK, etc"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1536 commits)
  cxgb4 : Disable recursive mailbox commands when enabling vi
  net: reduce USB network driver config options.
  tg3: Modify tg3_tso_bug() to handle multiple TX rings
  amd-xgbe: Perform phy connect/disconnect at dev open/stop
  amd-xgbe: Use dma_set_mask_and_coherent to set DMA mask
  net: sun4i-emac: fix memory leak on bad packet
  sctp: fix possible seqlock seadlock in sctp_packet_transmit()
  Revert "net: phy: Set the driver when registering an MDIO bus device"
  cxgb4vf: Turn off SGE RX/TX Callback Timers and interrupts in PCI shutdown routine
  team: Simplify return path of team_newlink
  bridge: Update outdated comment on promiscuous mode
  net-timestamp: ACK timestamp for bytestreams
  net-timestamp: TCP timestamping
  net-timestamp: SCHED timestamp on entering packet scheduler
  net-timestamp: add key to disambiguate concurrent datagrams
  net-timestamp: move timestamp flags out of sk_flags
  net-timestamp: extend SCM_TIMESTAMPING ancillary data struct
  cxgb4i : Move stray CPL definitions to cxgb4 driver
  tcp: reduce spurious retransmits due to transient SACK reneging
  qlcnic: Initialize dcbnl_ops before register_netdev
  ...

44 files changed, 1416 insertions, 1064 deletions

diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 05c57f0..dbc10d8 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -307,6 +307,10 @@ config NET_IPVTI
 	  the notion of a secure tunnel for IPSEC and then use routing protocol
 	  on top.
 
+config NET_UDP_TUNNEL
+	tristate
+	default n
+
 config INET_AH
 	tristate "IP: AH transformation"
 	select XFRM_ALGO
diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index f032688..8ee1cd4 100644
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_NET_IPIP) += ipip.o
 gre-y := gre_demux.o
 obj-$(CONFIG_NET_IPGRE_DEMUX) += gre.o
 obj-$(CONFIG_NET_IPGRE) += ip_gre.o
+obj-$(CONFIG_NET_UDP_TUNNEL) += udp_tunnel.o
 obj-$(CONFIG_NET_IPVTI) += ip_vti.o
 obj-$(CONFIG_SYN_COOKIES) += syncookies.o
 obj-$(CONFIG_INET_AH) += ah4.o
diff --git a/net/ipv4/datagram.c b/net/ipv4/datagram.c
index a3095fd..90c0e83 100644
--- a/net/ipv4/datagram.c
+++ b/net/ipv4/datagram.c
@@ -76,6 +76,7 @@ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	inet->inet_daddr = fl4->daddr;
 	inet->inet_dport = usin->sin_port;
 	sk->sk_state = TCP_ESTABLISHED;
+	inet_set_txhash(sk);
 	inet->inet_id = jiffies;
 
 	sk_dst_set(sk, &rt->dst);
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index e944937..214882e 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -180,11 +180,12 @@ static BLOCKING_NOTIFIER_HEAD(inetaddr_chain);
 static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
 			 int destroy);
 #ifdef CONFIG_SYSCTL
-static void devinet_sysctl_register(struct in_device *idev);
+static int devinet_sysctl_register(struct in_device *idev);
 static void devinet_sysctl_unregister(struct in_device *idev);
 #else
-static void devinet_sysctl_register(struct in_device *idev)
+static int devinet_sysctl_register(struct in_device *idev)
 {
+	return 0;
 }
 static void devinet_sysctl_unregister(struct in_device *idev)
 {
@@ -232,6 +233,7 @@ EXPORT_SYMBOL(in_dev_finish_destroy);
 static struct in_device *inetdev_init(struct net_device *dev)
 {
 	struct in_device *in_dev;
+	int err = -ENOMEM;
 
 	ASSERT_RTNL();
 
@@ -252,7 +254,13 @@ static struct in_device *inetdev_init(struct net_device *dev)
 	/* Account for reference dev->ip_ptr (below) */
 	in_dev_hold(in_dev);
 
-	devinet_sysctl_register(in_dev);
+	err = devinet_sysctl_register(in_dev);
+	if (err) {
+		in_dev->dead = 1;
+		in_dev_put(in_dev);
+		in_dev = NULL;
+		goto out;
+	}
 	ip_mc_init_dev(in_dev);
 	if (dev->flags & IFF_UP)
 		ip_mc_up(in_dev);
@@ -260,7 +268,7 @@ static struct in_device *inetdev_init(struct net_device *dev)
 	/* we can receive as soon as ip_ptr is set -- do this last */
 	rcu_assign_pointer(dev->ip_ptr, in_dev);
 out:
-	return in_dev;
+	return in_dev ?: ERR_PTR(err);
 out_kfree:
 	kfree(in_dev);
 	in_dev = NULL;
@@ -1347,8 +1355,8 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
 	if (!in_dev) {
 		if (event == NETDEV_REGISTER) {
 			in_dev = inetdev_init(dev);
-			if (!in_dev)
-				return notifier_from_errno(-ENOMEM);
+			if (IS_ERR(in_dev))
+				return notifier_from_errno(PTR_ERR(in_dev));
 			if (dev->flags & IFF_LOOPBACK) {
 				IN_DEV_CONF_SET(in_dev, NOXFRM, 1);
 				IN_DEV_CONF_SET(in_dev, NOPOLICY, 1);
@@ -2182,11 +2190,21 @@ static void __devinet_sysctl_unregister(struct ipv4_devconf *cnf)
 	kfree(t);
 }
 
-static void devinet_sysctl_register(struct in_device *idev)
+static int devinet_sysctl_register(struct in_device *idev)
 {
-	neigh_sysctl_register(idev->dev, idev->arp_parms, NULL);
-	__devinet_sysctl_register(dev_net(idev->dev), idev->dev->name,
+	int err;
+
+	if (!sysctl_dev_name_is_allowed(idev->dev->name))
+		return -EINVAL;
+
+	err = neigh_sysctl_register(idev->dev, idev->arp_parms, NULL);
+	if (err)
+		return err;
+	err = __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name,
 					&idev->cnf);
+	if (err)
+		neigh_sysctl_unregister(idev->arp_parms);
+	return err;
 }
 
 static void devinet_sysctl_unregister(struct in_device *idev)
diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c
index f0bdd47..6556263 100644
--- a/net/ipv4/gre_offload.c
+++ b/net/ipv4/gre_offload.c
@@ -74,7 +74,7 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
 	/* segment inner packet. */
 	enc_features = skb->dev->hw_enc_features & netif_skb_features(skb);
 	segs = skb_mac_gso_segment(skb, enc_features);
-	if (!segs || IS_ERR(segs)) {
+	if (IS_ERR_OR_NULL(segs)) {
 		skb_gso_error_unwind(skb, protocol, ghl, mac_offset, mac_len);
 		goto out;
 	}
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 42b7bcf..ea7d4af 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -663,16 +663,16 @@ static void icmp_socket_deliver(struct sk_buff *skb, u32 info)
 	/* Checkin full IP header plus 8 bytes of protocol to
 	 * avoid additional coding at protocol handlers.
 	 */
-	if (!pskb_may_pull(skb, iph->ihl * 4 + 8))
+	if (!pskb_may_pull(skb, iph->ihl * 4 + 8)) {
+		ICMP_INC_STATS_BH(dev_net(skb->dev), ICMP_MIB_INERRORS);
 		return;
+	}
 
 	raw_icmp_error(skb, protocol, info);
 
-	rcu_read_lock();
 	ipprot = rcu_dereference(inet_protos[protocol]);
 	if (ipprot && ipprot->err_handler)
 		ipprot->err_handler(skb, info);
-	rcu_read_unlock();
 }
 
 static bool icmp_tag_validation(int proto)
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index db710b0..f10eab4 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -1321,7 +1321,7 @@ 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
-	setup_timer(&im->timer, &igmp_timer_expire, (unsigned long)im);
+	setup_timer(&im->timer, igmp_timer_expire, (unsigned long)im);
 	im->unsolicit_count = IGMP_Unsolicited_Report_Count;
 #endif
 
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index 3b01959..9eb89f3 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -25,6 +25,12 @@
 #include <net/inet_frag.h>
 #include <net/inet_ecn.h>
 
+#define INETFRAGS_EVICT_BUCKETS   128
+#define INETFRAGS_EVICT_MAX	  512
+
+/* don't rebuild inetfrag table with new secret more often than this */
+#define INETFRAGS_MIN_REBUILD_INTERVAL (5 * HZ)
+
 /* Given the OR values of all fragments, apply RFC 3168 5.3 requirements
  * Value : 0xff if frame should be dropped.
  *         0 or INET_ECN_CE value, to be ORed in to final iph->tos field
@@ -46,24 +52,39 @@ const u8 ip_frag_ecn_table[16] = {
 };
 EXPORT_SYMBOL(ip_frag_ecn_table);
 
-static void inet_frag_secret_rebuild(unsigned long dummy)
+static unsigned int
+inet_frag_hashfn(const struct inet_frags *f, const struct inet_frag_queue *q)
+{
+	return f->hashfn(q) & (INETFRAGS_HASHSZ - 1);
+}
+
+static bool inet_frag_may_rebuild(struct inet_frags *f)
+{
+	return time_after(jiffies,
+	       f->last_rebuild_jiffies + INETFRAGS_MIN_REBUILD_INTERVAL);
+}
+
+static void inet_frag_secret_rebuild(struct inet_frags *f)
 {
-	struct inet_frags *f = (struct inet_frags *)dummy;
-	unsigned long now = jiffies;
 	int i;
 
-	/* Per bucket lock NOT needed here, due to write lock protection */
-	write_lock(&f->lock);
+	write_seqlock_bh(&f->rnd_seqlock);
+
+	if (!inet_frag_may_rebuild(f))
+		goto out;
 
 	get_random_bytes(&f->rnd, sizeof(u32));
+
 	for (i = 0; i < INETFRAGS_HASHSZ; i++) {
 		struct inet_frag_bucket *hb;
 		struct inet_frag_queue *q;
 		struct hlist_node *n;
 
 		hb = &f->hash[i];
+		spin_lock(&hb->chain_lock);
+
 		hlist_for_each_entry_safe(q, n, &hb->chain, list) {
-			unsigned int hval = f->hashfn(q);
+			unsigned int hval = inet_frag_hashfn(f, q);
 
 			if (hval != i) {
 				struct inet_frag_bucket *hb_dest;
@@ -72,76 +93,200 @@ static void inet_frag_secret_rebuild(unsigned long dummy)
 
 				/* Relink to new hash chain. */
 				hb_dest = &f->hash[hval];
+
+				/* This is the only place where we take
+				 * another chain_lock while already holding
+				 * one.  As this will not run concurrently,
+				 * we cannot deadlock on hb_dest lock below, if its
+				 * already locked it will be released soon since
+				 * other caller cannot be waiting for hb lock
+				 * that we've taken above.
+				 */
+				spin_lock_nested(&hb_dest->chain_lock,
+						 SINGLE_DEPTH_NESTING);
 				hlist_add_head(&q->list, &hb_dest->chain);
+				spin_unlock(&hb_dest->chain_lock);
 			}
 		}
+		spin_unlock(&hb->chain_lock);
+	}
+
+	f->rebuild = false;
+	f->last_rebuild_jiffies = jiffies;
+out:
+	write_sequnlock_bh(&f->rnd_seqlock);
+}
+
+static bool inet_fragq_should_evict(const struct inet_frag_queue *q)
+{
+	return q->net->low_thresh == 0 ||
+	       frag_mem_limit(q->net) >= q->net->low_thresh;
+}
+
+static unsigned int
+inet_evict_bucket(struct inet_frags *f, struct inet_frag_bucket *hb)
+{
+	struct inet_frag_queue *fq;
+	struct hlist_node *n;
+	unsigned int evicted = 0;
+	HLIST_HEAD(expired);
+
+evict_again:
+	spin_lock(&hb->chain_lock);
+
+	hlist_for_each_entry_safe(fq, n, &hb->chain, list) {
+		if (!inet_fragq_should_evict(fq))
+			continue;
+
+		if (!del_timer(&fq->timer)) {
+			/* q expiring right now thus increment its refcount so
+			 * it won't be freed under us and wait until the timer
+			 * has finished executing then destroy it
+			 */
+			atomic_inc(&fq->refcnt);
+			spin_unlock(&hb->chain_lock);
+			del_timer_sync(&fq->timer);
+			WARN_ON(atomic_read(&fq->refcnt) != 1);
+			inet_frag_put(fq, f);
+			goto evict_again;
+		}
+
+		fq->flags |= INET_FRAG_EVICTED;
+		hlist_del(&fq->list);
+		hlist_add_head(&fq->list, &expired);
+		++evicted;
 	}
-	write_unlock(&f->lock);
 
-	mod_timer(&f->secret_timer, now + f->secret_interval);
+	spin_unlock(&hb->chain_lock);
+
+	hlist_for_each_entry_safe(fq, n, &expired, list)
+		f->frag_expire((unsigned long) fq);
+
+	return evicted;
 }
 
-void inet_frags_init(struct inet_frags *f)
+static void inet_frag_worker(struct work_struct *work)
+{
+	unsigned int budget = INETFRAGS_EVICT_BUCKETS;
+	unsigned int i, evicted = 0;
+	struct inet_frags *f;
+
+	f = container_of(work, struct inet_frags, frags_work);
+
+	BUILD_BUG_ON(INETFRAGS_EVICT_BUCKETS >= INETFRAGS_HASHSZ);
+
+	local_bh_disable();
+
+	for (i = ACCESS_ONCE(f->next_bucket); budget; --budget) {
+		evicted += inet_evict_bucket(f, &f->hash[i]);
+		i = (i + 1) & (INETFRAGS_HASHSZ - 1);
+		if (evicted > INETFRAGS_EVICT_MAX)
+			break;
+	}
+
+	f->next_bucket = i;
+
+	local_bh_enable();
+
+	if (f->rebuild && inet_frag_may_rebuild(f))
+		inet_frag_secret_rebuild(f);
+}
+
+static void inet_frag_schedule_worker(struct inet_frags *f)
+{
+	if (unlikely(!work_pending(&f->frags_work)))
+		schedule_work(&f->frags_work);
+}
+
+int inet_frags_init(struct inet_frags *f)
 {
 	int i;
 
+	INIT_WORK(&f->frags_work, inet_frag_worker);
+
 	for (i = 0; i < INETFRAGS_HASHSZ; i++) {
 		struct inet_frag_bucket *hb = &f->hash[i];
 
 		spin_lock_init(&hb->chain_lock);
 		INIT_HLIST_HEAD(&hb->chain);
 	}
-	rwlock_init(&f->lock);
 
-	setup_timer(&f->secret_timer, inet_frag_secret_rebuild,
-			(unsigned long)f);
-	f->secret_timer.expires = jiffies + f->secret_interval;
-	add_timer(&f->secret_timer);
+	seqlock_init(&f->rnd_seqlock);
+	f->last_rebuild_jiffies = 0;
+	f->frags_cachep = kmem_cache_create(f->frags_cache_name, f->qsize, 0, 0,
+					    NULL);
+	if (!f->frags_cachep)
+		return -ENOMEM;
+
+	return 0;
 }
 EXPORT_SYMBOL(inet_frags_init);
 
 void inet_frags_init_net(struct netns_frags *nf)
 {
-	nf->nqueues = 0;
 	init_frag_mem_limit(nf);
-	INIT_LIST_HEAD(&nf->lru_list);
-	spin_lock_init(&nf->lru_lock);
 }
 EXPORT_SYMBOL(inet_frags_init_net);
 
 void inet_frags_fini(struct inet_frags *f)
 {
-	del_timer(&f->secret_timer);
+	cancel_work_sync(&f->frags_work);
+	kmem_cache_destroy(f->frags_cachep);
 }
 EXPORT_SYMBOL(inet_frags_fini);
 
 void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f)
 {
-	nf->low_thresh = 0;
+	unsigned int seq;
+	int i;
 
+	nf->low_thresh = 0;
 	local_bh_disable();
-	inet_frag_evictor(nf, f, true);
+
+evict_again:
+	seq = read_seqbegin(&f->rnd_seqlock);
+
+	for (i = 0; i < INETFRAGS_HASHSZ ; i++)
+		inet_evict_bucket(f, &f->hash[i]);
+
+	if (read_seqretry(&f->rnd_seqlock, seq))
+		goto evict_again;
+
 	local_bh_enable();
 
 	percpu_counter_destroy(&nf->mem);
 }
 EXPORT_SYMBOL(inet_frags_exit_net);
 
-static inline void fq_unlink(struct inet_frag_queue *fq, struct inet_frags *f)
+static struct inet_frag_bucket *
+get_frag_bucket_locked(struct inet_frag_queue *fq, struct inet_frags *f)
+__acquires(hb->chain_lock)
 {
 	struct inet_frag_bucket *hb;
-	unsigned int hash;
+	unsigned int seq, hash;
+
+ restart:
+	seq = read_seqbegin(&f->rnd_seqlock);
 
-	read_lock(&f->lock);
-	hash = f->hashfn(fq);
+	hash = inet_frag_hashfn(f, fq);
 	hb = &f->hash[hash];
 
 	spin_lock(&hb->chain_lock);
+	if (read_seqretry(&f->rnd_seqlock, seq)) {
+		spin_unlock(&hb->chain_lock);
+		goto restart;
+	}
+
+	return hb;
+}
+
+static inline void fq_unlink(struct inet_frag_queue *fq, struct inet_frags *f)
+{
+	struct inet_frag_bucket *hb;
+
+	hb = get_frag_bucket_locked(fq, f);
 	hlist_del(&fq->list);
 	spin_unlock(&hb->chain_lock);
-
-	read_unlock(&f->lock);
-	inet_frag_lru_del(fq);
 }
 
 void inet_frag_kill(struct inet_frag_queue *fq, struct inet_frags *f)
@@ -149,30 +294,29 @@ void inet_frag_kill(struct inet_frag_queue *fq, struct inet_frags *f)
 	if (del_timer(&fq->timer))
 		atomic_dec(&fq->refcnt);
 
-	if (!(fq->last_in & INET_FRAG_COMPLETE)) {
+	if (!(fq->flags & INET_FRAG_COMPLETE)) {
 		fq_unlink(fq, f);
 		atomic_dec(&fq->refcnt);
-		fq->last_in |= INET_FRAG_COMPLETE;
+		fq->flags |= INET_FRAG_COMPLETE;
 	}
 }
 EXPORT_SYMBOL(inet_frag_kill);
 
 static inline void frag_kfree_skb(struct netns_frags *nf, struct inet_frags *f,
-		struct sk_buff *skb)
+				  struct sk_buff *skb)
 {
 	if (f->skb_free)
 		f->skb_free(skb);
 	kfree_skb(skb);
 }
 
-void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
-					int *work)
+void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f)
 {
 	struct sk_buff *fp;
 	struct netns_frags *nf;
 	unsigned int sum, sum_truesize = 0;
 
-	WARN_ON(!(q->last_in & INET_FRAG_COMPLETE));
+	WARN_ON(!(q->flags & INET_FRAG_COMPLETE));
 	WARN_ON(del_timer(&q->timer) != 0);
 
 	/* Release all fragment data. */
@@ -186,87 +330,32 @@ void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
 		fp = xp;
 	}
 	sum = sum_truesize + f->qsize;
-	if (work)
-		*work -= sum;
 	sub_frag_mem_limit(q, sum);
 
 	if (f->destructor)
 		f->destructor(q);
-	kfree(q);
-
+	kmem_cache_free(f->frags_cachep, q);
 }
 EXPORT_SYMBOL(inet_frag_destroy);
 
-int inet_frag_evictor(struct netns_frags *nf, struct inet_frags *f, bool force)
-{
-	struct inet_frag_queue *q;
-	int work, evicted = 0;
-
-	if (!force) {
-		if (frag_mem_limit(nf) <= nf->high_thresh)
-			return 0;
-	}
-
-	work = frag_mem_limit(nf) - nf->low_thresh;
-	while (work > 0 || force) {
-		spin_lock(&nf->lru_lock);
-
-		if (list_empty(&nf->lru_list)) {
-			spin_unlock(&nf->lru_lock);
-			break;
-		}
-
-		q = list_first_entry(&nf->lru_list,
-				struct inet_frag_queue, lru_list);
-		atomic_inc(&q->refcnt);
-		/* Remove q from list to avoid several CPUs grabbing it */
-		list_del_init(&q->lru_list);
-
-		spin_unlock(&nf->lru_lock);
-
-		spin_lock(&q->lock);
-		if (!(q->last_in & INET_FRAG_COMPLETE))
-			inet_frag_kill(q, f);
-		spin_unlock(&q->lock);
-
-		if (atomic_dec_and_test(&q->refcnt))
-			inet_frag_destroy(q, f, &work);
-		evicted++;
-	}
-
-	return evicted;
-}
-EXPORT_SYMBOL(inet_frag_evictor);
-
 static struct inet_frag_queue *inet_frag_intern(struct netns_frags *nf,
-		struct inet_frag_queue *qp_in, struct inet_frags *f,
-		void *arg)
+						struct inet_frag_queue *qp_in,
+						struct inet_frags *f,
+						void *arg)
 {
-	struct inet_frag_bucket *hb;
+	struct inet_frag_bucket *hb = get_frag_bucket_locked(qp_in, f);
 	struct inet_frag_queue *qp;
-	unsigned int hash;
-
-	read_lock(&f->lock); /* Protects against hash rebuild */
-	/*
-	 * While we stayed w/o the lock other CPU could update
-	 * the rnd seed, so we need to re-calculate the hash
-	 * chain. Fortunatelly the qp_in can be used to get one.
-	 */
-	hash = f->hashfn(qp_in);
-	hb = &f->hash[hash];
-	spin_lock(&hb->chain_lock);
 
 #ifdef CONFIG_SMP
 	/* With SMP race we have to recheck hash table, because
-	 * such entry could be created on other cpu, while we
-	 * released the hash bucket lock.
+	 * such entry could have been created on other cpu before
+	 * we acquired hash bucket lock.
 	 */
 	hlist_for_each_entry(qp, &hb->chain, list) {
 		if (qp->net == nf && f->match(qp, arg)) {
 			atomic_inc(&qp->refcnt);
 			spin_unlock(&hb->chain_lock);
-			read_unlock(&f->lock);
-			qp_in->last_in |= INET_FRAG_COMPLETE;
+			qp_in->flags |= INET_FRAG_COMPLETE;
 			inet_frag_put(qp_in, f);
 			return qp;
 		}
@@ -278,19 +367,24 @@ static struct inet_frag_queue *inet_frag_intern(struct netns_frags *nf,
 
 	atomic_inc(&qp->refcnt);
 	hlist_add_head(&qp->list, &hb->chain);
-	inet_frag_lru_add(nf, qp);
+
 	spin_unlock(&hb->chain_lock);
-	read_unlock(&f->lock);
 
 	return qp;
 }
 
 static struct inet_frag_queue *inet_frag_alloc(struct netns_frags *nf,
-		struct inet_frags *f, void *arg)
+					       struct inet_frags *f,
+					       void *arg)
 {
 	struct inet_frag_queue *q;
 
-	q = kzalloc(f->qsize, GFP_ATOMIC);
+	if (frag_mem_limit(nf) > nf->high_thresh) {
+		inet_frag_schedule_worker(f);
+		return NULL;
+	}
+
+	q = kmem_cache_zalloc(f->frags_cachep, GFP_ATOMIC);
 	if (q == NULL)
 		return NULL;
 
@@ -301,13 +395,13 @@ static struct inet_frag_queue *inet_frag_alloc(struct netns_frags *nf,
 	setup_timer(&q->timer, f->frag_expire, (unsigned long)q);
 	spin_lock_init(&q->lock);
 	atomic_set(&q->refcnt, 1);
-	INIT_LIST_HEAD(&q->lru_list);
 
 	return q;
 }
 
 static struct inet_frag_queue *inet_frag_create(struct netns_frags *nf,
-		struct inet_frags *f, void *arg)
+						struct inet_frags *f,
+						void *arg)
 {
 	struct inet_frag_queue *q;
 
@@ -319,13 +413,17 @@ static struct inet_frag_queue *inet_frag_create(struct netns_frags *nf,
 }
 
 struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
-		struct inet_frags *f, void *key, unsigned int hash)
-	__releases(&f->lock)
+				       struct inet_frags *f, void *key,
+				       unsigned int hash)
 {
 	struct inet_frag_bucket *hb;
 	struct inet_frag_queue *q;
 	int depth = 0;
 
+	if (frag_mem_limit(nf) > nf->low_thresh)
+		inet_frag_schedule_worker(f);
+
+	hash &= (INETFRAGS_HASHSZ - 1);
 	hb = &f->hash[hash];
 
 	spin_lock(&hb->chain_lock);
@@ -333,18 +431,22 @@ struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
 		if (q->net == nf && f->match(q, key)) {
 			atomic_inc(&q->refcnt);
 			spin_unlock(&hb->chain_lock);
-			read_unlock(&f->lock);
 			return q;
 		}
 		depth++;
 	}
 	spin_unlock(&hb->chain_lock);
-	read_unlock(&f->lock);
 
 	if (depth <= INETFRAGS_MAXDEPTH)
 		return inet_frag_create(nf, f, key);
-	else
-		return ERR_PTR(-ENOBUFS);
+
+	if (inet_frag_may_rebuild(f)) {
+		if (!f->rebuild)
+			f->rebuild = true;
+		inet_frag_schedule_worker(f);
+	}
+
+	return ERR_PTR(-ENOBUFS);
 }
 EXPORT_SYMBOL(inet_frag_find);
 
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index ed32313..15f0e2b 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -55,6 +55,7 @@
  */
 
 static int sysctl_ipfrag_max_dist __read_mostly = 64;
+static const char ip_frag_cache_name[] = "ip4-frags";
 
 struct ipfrag_skb_cb
 {
@@ -86,11 +87,6 @@ static inline u8 ip4_frag_ecn(u8 tos)
 
 static struct inet_frags ip4_frags;
 
-int ip_frag_nqueues(struct net *net)
-{
-	return net->ipv4.frags.nqueues;
-}
-
 int ip_frag_mem(struct net *net)
 {
 	return sum_frag_mem_limit(&net->ipv4.frags);
@@ -109,21 +105,21 @@ static unsigned int ipqhashfn(__be16 id, __be32 saddr, __be32 daddr, u8 prot)
 	net_get_random_once(&ip4_frags.rnd, sizeof(ip4_frags.rnd));
 	return jhash_3words((__force u32)id << 16 | prot,
 			    (__force u32)saddr, (__force u32)daddr,
-			    ip4_frags.rnd) & (INETFRAGS_HASHSZ - 1);
+			    ip4_frags.rnd);
 }
 
-static unsigned int ip4_hashfn(struct inet_frag_queue *q)
+static unsigned int ip4_hashfn(const struct inet_frag_queue *q)
 {
-	struct ipq *ipq;
+	const struct ipq *ipq;
 
 	ipq = container_of(q, struct ipq, q);
 	return ipqhashfn(ipq->id, ipq->saddr, ipq->daddr, ipq->protocol);
 }
 
-static bool ip4_frag_match(struct inet_frag_queue *q, void *a)
+static bool ip4_frag_match(const struct inet_frag_queue *q, const void *a)
 {
-	struct ipq *qp;
-	struct ip4_create_arg *arg = a;
+	const struct ipq *qp;
+	const struct ip4_create_arg *arg = a;
 
 	qp = container_of(q, struct ipq, q);
 	return	qp->id == arg->iph->id &&
@@ -133,14 +129,14 @@ static bool ip4_frag_match(struct inet_frag_queue *q, void *a)
 		qp->user == arg->user;
 }
 
-static void ip4_frag_init(struct inet_frag_queue *q, void *a)
+static void ip4_frag_init(struct inet_frag_queue *q, const void *a)
 {
 	struct ipq *qp = container_of(q, struct ipq, q);
 	struct netns_ipv4 *ipv4 = container_of(q->net, struct netns_ipv4,
 					       frags);
 	struct net *net = container_of(ipv4, struct net, ipv4);
 
-	struct ip4_create_arg *arg = a;
+	const struct ip4_create_arg *arg = a;
 
 	qp->protocol = arg->iph->protocol;
 	qp->id = arg->iph->id;
@@ -177,18 +173,6 @@ static void ipq_kill(struct ipq *ipq)
 	inet_frag_kill(&ipq->q, &ip4_frags);
 }
 
-/* Memory limiting on fragments.  Evictor trashes the oldest
- * fragment queue until we are back under the threshold.
- */
-static void ip_evictor(struct net *net)
-{
-	int evicted;
-
-	evicted = inet_frag_evictor(&net->ipv4.frags, &ip4_frags, false);
-	if (evicted)
-		IP_ADD_STATS_BH(net, IPSTATS_MIB_REASMFAILS, evicted);
-}
-
 /*
  * Oops, a fragment queue timed out.  Kill it and send an ICMP reply.
  */
@@ -202,19 +186,22 @@ static void ip_expire(unsigned long arg)
 
 	spin_lock(&qp->q.lock);
 
-	if (qp->q.last_in & INET_FRAG_COMPLETE)
+	if (qp->q.flags & INET_FRAG_COMPLETE)
 		goto out;
 
 	ipq_kill(qp);
-
-	IP_INC_STATS_BH(net, IPSTATS_MIB_REASMTIMEOUT);
 	IP_INC_STATS_BH(net, IPSTATS_MIB_REASMFAILS);
 
-	if ((qp->q.last_in & INET_FRAG_FIRST_IN) && qp->q.fragments != NULL) {
+	if (!(qp->q.flags & INET_FRAG_EVICTED)) {
 		struct sk_buff *head = qp->q.fragments;
 		const struct iphdr *iph;
 		int err;
 
+		IP_INC_STATS_BH(net, IPSTATS_MIB_REASMTIMEOUT);
+
+		if (!(qp->q.flags & INET_FRAG_FIRST_IN) || !qp->q.fragments)
+			goto out;
+
 		rcu_read_lock();
 		head->dev = dev_get_by_index_rcu(net, qp->iif);
 		if (!head->dev)
@@ -227,8 +214,7 @@ static void ip_expire(unsigned long arg)
 		if (err)
 			goto out_rcu_unlock;
 
-		/*
-		 * Only an end host needs to send an ICMP
+		/* Only an end host needs to send an ICMP
 		 * "Fragment Reassembly Timeout" message, per RFC792.
 		 */
 		if (qp->user == IP_DEFRAG_AF_PACKET ||
@@ -237,7 +223,6 @@ static void ip_expire(unsigned long arg)
 		     (skb_rtable(head)->rt_type != RTN_LOCAL)))
 			goto out_rcu_unlock;
 
-
 		/* Send an ICMP "Fragment Reassembly Timeout" message. */
 		icmp_send(head, ICMP_TIME_EXCEEDED, ICMP_EXC_FRAGTIME, 0);
 out_rcu_unlock:
@@ -260,7 +245,6 @@ static inline struct ipq *ip_find(struct net *net, struct iphdr *iph, u32 user)
 	arg.iph = iph;
 	arg.user = user;
 
-	read_lock(&ip4_frags.lock);
 	hash = ipqhashfn(iph->id, iph->saddr, iph->daddr, iph->protocol);
 
 	q = inet_frag_find(&net->ipv4.frags, &ip4_frags, &arg, hash);
@@ -319,7 +303,7 @@ static int ip_frag_reinit(struct ipq *qp)
 	} while (fp);
 	sub_frag_mem_limit(&qp->q, sum_truesize);
 
-	qp->q.last_in = 0;
+	qp->q.flags = 0;
 	qp->q.len = 0;
 	qp->q.meat = 0;
 	qp->q.fragments = NULL;
@@ -340,7 +324,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
 	int err = -ENOENT;
 	u8 ecn;
 
-	if (qp->q.last_in & INET_FRAG_COMPLETE)
+	if (qp->q.flags & INET_FRAG_COMPLETE)
 		goto err;
 
 	if (!(IPCB(skb)->flags & IPSKB_FRAG_COMPLETE) &&
@@ -367,9 +351,9 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
 		 * or have different end, the segment is corrupted.
 		 */
 		if (end < qp->q.len ||
-		    ((qp->q.last_in & INET_FRAG_LAST_IN) && end != qp->q.len))
+		    ((qp->q.flags & INET_FRAG_LAST_IN) && end != qp->q.len))
 			goto err;
-		qp->q.last_in |= INET_FRAG_LAST_IN;
+		qp->q.flags |= INET_FRAG_LAST_IN;
 		qp->q.len = end;
 	} else {
 		if (end&7) {
@@ -379,7 +363,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
 		}
 		if (end > qp->q.len) {
 			/* Some bits beyond end -> corruption. */
-			if (qp->q.last_in & INET_FRAG_LAST_IN)
+			if (qp->q.flags & INET_FRAG_LAST_IN)
 				goto err;
 			qp->q.len = end;
 		}
@@ -488,13 +472,13 @@ found:
 	qp->ecn |= ecn;
 	add_frag_mem_limit(&qp->q, skb->truesize);
 	if (offset == 0)
-		qp->q.last_in |= INET_FRAG_FIRST_IN;
+		qp->q.flags |= INET_FRAG_FIRST_IN;
 
 	if (ip_hdr(skb)->frag_off & htons(IP_DF) &&
 	    skb->len + ihl > qp->q.max_size)
 		qp->q.max_size = skb->len + ihl;
 
-	if (qp->q.last_in == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
+	if (qp->q.flags == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
 	    qp->q.meat == qp->q.len) {
 		unsigned long orefdst = skb->_skb_refdst;
 
@@ -505,7 +489,6 @@ found:
 	}
 
 	skb_dst_drop(skb);
-	inet_frag_lru_move(&qp->q);
 	return -EINPROGRESS;
 
 err:
@@ -655,9 +638,6 @@ int ip_defrag(struct sk_buff *skb, u32 user)
 	net = skb->dev ? dev_net(skb->dev) : dev_net(skb_dst(skb)->dev);
 	IP_INC_STATS_BH(net, IPSTATS_MIB_REASMREQDS);
 
-	/* Start by cleaning up the memory. */
-	ip_evictor(net);
-
 	/* Lookup (or create) queue header */
 	if ((qp = ip_find(net, ip_hdr(skb), user)) != NULL) {
 		int ret;
@@ -721,14 +701,17 @@ 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_minmax,
+		.extra1		= &init_net.ipv4.frags.low_thresh
 	},
 	{
 		.procname	= "ipfrag_low_thresh",
 		.data		= &init_net.ipv4.frags.low_thresh,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= &zero,
+		.extra2		= &init_net.ipv4.frags.high_thresh
 	},
 	{
 		.procname	= "ipfrag_time",
@@ -740,10 +723,12 @@ static struct ctl_table ip4_frags_ns_ctl_table[] = {
 	{ }
 };
 
+/* secret interval has been deprecated */
+static int ip4_frags_secret_interval_unused;
 static struct ctl_table ip4_frags_ctl_table[] = {
 	{
 		.procname	= "ipfrag_secret_interval",
-		.data		= &ip4_frags.secret_interval,
+		.data		= &ip4_frags_secret_interval_unused,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec_jiffies,
@@ -771,7 +756,10 @@ static int __net_init ip4_frags_ns_ctl_register(struct net *net)
 			goto err_alloc;
 
 		table[0].data = &net->ipv4.frags.high_thresh;
+		table[0].extra1 = &net->ipv4.frags.low_thresh;
+		table[0].extra2 = &init_net.ipv4.frags.high_thresh;
 		table[1].data = &net->ipv4.frags.low_thresh;
+		table[1].extra2 = &net->ipv4.frags.high_thresh;
 		table[2].data = &net->ipv4.frags.timeout;
 
 		/* Don't export sysctls to unprivileged users */
@@ -873,6 +861,7 @@ void __init ipfrag_init(void)
 	ip4_frags.qsize = sizeof(struct ipq);
 	ip4_frags.match = ip4_frag_match;
 	ip4_frags.frag_expire = ip_expire;
-	ip4_frags.secret_interval = 10 * 60 * HZ;
-	inet_frags_init(&ip4_frags);
+	ip4_frags.frags_cache_name = ip_frag_cache_name;
+	if (inet_frags_init(&ip4_frags))
+		panic("IP: failed to allocate ip4_frags cache\n");
 }
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 8d3b6b0..215af2b 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -855,11 +855,15 @@ static int __ip_append_data(struct sock *sk,
 	unsigned int maxfraglen, fragheaderlen, maxnonfragsize;
 	int csummode = CHECKSUM_NONE;
 	struct rtable *rt = (struct rtable *)cork->dst;
+	u32 tskey = 0;
 
 	skb = skb_peek_tail(queue);
 
 	exthdrlen = !skb ? rt->dst.header_len : 0;
 	mtu = cork->fragsize;
+	if (cork->tx_flags & SKBTX_ANY_SW_TSTAMP &&
+	    sk->sk_tsflags & SOF_TIMESTAMPING_OPT_ID)
+		tskey = sk->sk_tskey++;
 
 	hh_len = LL_RESERVED_SPACE(rt->dst.dev);
 
@@ -962,10 +966,6 @@ alloc_new_skb:
 							   sk->sk_allocation);
 				if (unlikely(skb == NULL))
 					err = -ENOBUFS;
-				else
-					/* only the initial fragment is
-					   time stamped */
-					cork->tx_flags = 0;
 			}
 			if (skb == NULL)
 				goto error;
@@ -976,7 +976,12 @@ alloc_new_skb:
 			skb->ip_summed = csummode;
 			skb->csum = 0;
 			skb_reserve(skb, hh_len);
+
+			/* only the initial fragment is time stamped */
 			skb_shinfo(skb)->tx_flags = cork->tx_flags;
+			cork->tx_flags = 0;
+			skb_shinfo(skb)->tskey = tskey;
+			tskey = 0;
 
 			/*
 			 *	Find where to start putting bytes.
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 64741b9..5cb830c 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -1319,7 +1319,7 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname,
 		if (sk->sk_type != SOCK_STREAM)
 			return -ENOPROTOOPT;
 
-		msg.msg_control = optval;
+		msg.msg_control = (__force void *) optval;
 		msg.msg_controllen = len;
 		msg.msg_flags = flags;
 
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index 6f9de61..afed1aa 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -69,23 +69,25 @@ static unsigned int ip_tunnel_hash(__be32 key, __be32 remote)
 }
 
 static void __tunnel_dst_set(struct ip_tunnel_dst *idst,
-			     struct dst_entry *dst)
+			     struct dst_entry *dst, __be32 saddr)
 {
 	struct dst_entry *old_dst;
 
 	dst_clone(dst);
 	old_dst = xchg((__force struct dst_entry **)&idst->dst, dst);
 	dst_release(old_dst);
+	idst->saddr = saddr;
 }
 
-static void tunnel_dst_set(struct ip_tunnel *t, struct dst_entry *dst)
+static void tunnel_dst_set(struct ip_tunnel *t,
+			   struct dst_entry *dst, __be32 saddr)
 {
-	__tunnel_dst_set(this_cpu_ptr(t->dst_cache), dst);
+	__tunnel_dst_set(this_cpu_ptr(t->dst_cache), dst, saddr);
 }
 
 static void tunnel_dst_reset(struct ip_tunnel *t)
 {
-	tunnel_dst_set(t, NULL);
+	tunnel_dst_set(t, NULL, 0);
 }
 
 void ip_tunnel_dst_reset_all(struct ip_tunnel *t)
@@ -93,20 +95,25 @@ void ip_tunnel_dst_reset_all(struct ip_tunnel *t)
 	int i;
 
 	for_each_possible_cpu(i)
-		__tunnel_dst_set(per_cpu_ptr(t->dst_cache, i), NULL);
+		__tunnel_dst_set(per_cpu_ptr(t->dst_cache, i), NULL, 0);
 }
 EXPORT_SYMBOL(ip_tunnel_dst_reset_all);
 
-static struct rtable *tunnel_rtable_get(struct ip_tunnel *t, u32 cookie)
+static struct rtable *tunnel_rtable_get(struct ip_tunnel *t,
+					u32 cookie, __be32 *saddr)
 {
+	struct ip_tunnel_dst *idst;
 	struct dst_entry *dst;
 
 	rcu_read_lock();
-	dst = rcu_dereference(this_cpu_ptr(t->dst_cache)->dst);
+	idst = this_cpu_ptr(t->dst_cache);
+	dst = rcu_dereference(idst->dst);
 	if (dst && !atomic_inc_not_zero(&dst->__refcnt))
 		dst = NULL;
 	if (dst) {
-		if (dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
+		if (!dst->obsolete || dst->ops->check(dst, cookie)) {
+			*saddr = idst->saddr;
+		} else {
 			tunnel_dst_reset(t);
 			dst_release(dst);
 			dst = NULL;
@@ -305,7 +312,7 @@ static struct net_device *__ip_tunnel_create(struct net *net,
 	}
 
 	ASSERT_RTNL();
-	dev = alloc_netdev(ops->priv_size, name, ops->setup);
+	dev = alloc_netdev(ops->priv_size, name, NET_NAME_UNKNOWN, ops->setup);
 	if (!dev) {
 		err = -ENOMEM;
 		goto failed;
@@ -367,7 +374,7 @@ static int ip_tunnel_bind_dev(struct net_device *dev)
 
 		if (!IS_ERR(rt)) {
 			tdev = rt->dst.dev;
-			tunnel_dst_set(tunnel, &rt->dst);
+			tunnel_dst_set(tunnel, &rt->dst, fl4.saddr);
 			ip_rt_put(rt);
 		}
 		if (dev->type != ARPHRD_ETHER)
@@ -610,7 +617,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
 	init_tunnel_flow(&fl4, protocol, dst, tnl_params->saddr,
 			 tunnel->parms.o_key, RT_TOS(tos), tunnel->parms.link);
 
-	rt = connected ? tunnel_rtable_get(tunnel, 0) : NULL;
+	rt = connected ? tunnel_rtable_get(tunnel, 0, &fl4.saddr) : NULL;
 
 	if (!rt) {
 		rt = ip_route_output_key(tunnel->net, &fl4);
@@ -620,7 +627,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
 			goto tx_error;
 		}
 		if (connected)
-			tunnel_dst_set(tunnel, &rt->dst);
+			tunnel_dst_set(tunnel, &rt->dst, fl4.saddr);
 	}
 
 	if (rt->dst.dev == dev) {
diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index b8960f3..e453cb7 100644
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -534,40 +534,28 @@ static struct rtnl_link_ops vti_link_ops __read_mostly = {
 
 static int __init vti_init(void)
 {
+	const char *msg;
 	int err;
 
-	pr_info("IPv4 over IPSec tunneling driver\n");
+	pr_info("IPv4 over IPsec tunneling driver\n");
 
+	msg = "tunnel device";
 	err = register_pernet_device(&vti_net_ops);
 	if (err < 0)
-		return err;
-	err = xfrm4_protocol_register(&vti_esp4_protocol, IPPROTO_ESP);
-	if (err < 0) {
-		unregister_pernet_device(&vti_net_ops);
-		pr_info("vti init: can't register tunnel\n");
-
-		return err;
-	}
+		goto pernet_dev_failed;
 
+	msg = "tunnel protocols";
+	err = xfrm4_protocol_register(&vti_esp4_protocol, IPPROTO_ESP);
+	if (err < 0)
+		goto xfrm_proto_esp_failed;
 	err = xfrm4_protocol_register(&vti_ah4_protocol, IPPROTO_AH);
-	if (err < 0) {
-		xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP);
-		unregister_pernet_device(&vti_net_ops);
-		pr_info("vti init: can't register tunnel\n");
-
-		return err;
-	}
-
+	if (err < 0)
+		goto xfrm_proto_ah_failed;
 	err = xfrm4_protocol_register(&vti_ipcomp4_protocol, IPPROTO_COMP);
-	if (err < 0) {
-		xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH);
-		xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP);
-		unregister_pernet_device(&vti_net_ops);
-		pr_info("vti init: can't register tunnel\n");
-
-		return err;
-	}
+	if (err < 0)
+		goto xfrm_proto_comp_failed;
 
+	msg = "netlink interface";
 	err = rtnl_link_register(&vti_link_ops);
 	if (err < 0)
 		goto rtnl_link_failed;
@@ -576,23 +564,23 @@ static int __init vti_init(void)
 
 rtnl_link_failed:
 	xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP);
+xfrm_proto_comp_failed:
 	xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH);
+xfrm_proto_ah_failed:
 	xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP);
+xfrm_proto_esp_failed:
 	unregister_pernet_device(&vti_net_ops);
+pernet_dev_failed:
+	pr_err("vti init: failed to register %s\n", msg);
 	return err;
 }
 
 static void __exit vti_fini(void)
 {
 	rtnl_link_unregister(&vti_link_ops);
-	if (xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP))
-		pr_info("vti close: can't deregister tunnel\n");
-	if (xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH))
-		pr_info("vti close: can't deregister tunnel\n");
-	if (xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP))
-		pr_info("vti close: can't deregister tunnel\n");
-
-
+	xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP);
+	xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH);
+	xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP);
 	unregister_pernet_device(&vti_net_ops);
 }
 
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index b3e86ea..5bbef4f 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -143,8 +143,6 @@ __be32 ic_servaddr = NONE;	/* Boot server IP address */
 __be32 root_server_addr = NONE;	/* Address of NFS server */
 u8 root_server_path[256] = { 0, };	/* Path to mount as root */
 
-__be32 ic_dev_xid;		/* Device under configuration */
-
 /* vendor class identifier */
 static char vendor_class_identifier[253] __initdata;
 
@@ -654,6 +652,7 @@ static struct packet_type bootp_packet_type __initdata = {
 	.func =	ic_bootp_recv,
 };
 
+static __be32 ic_dev_xid;		/* Device under configuration */
 
 /*
  *  Initialize DHCP/BOOTP extension fields in the request.
@@ -1218,10 +1217,10 @@ static int __init ic_dynamic(void)
 	get_random_bytes(&timeout, sizeof(timeout));
 	timeout = CONF_BASE_TIMEOUT + (timeout % (unsigned int) CONF_TIMEOUT_RANDOM);
 	for (;;) {
+#ifdef IPCONFIG_BOOTP
 		/* Track the device we are configuring */
 		ic_dev_xid = d->xid;
 
-#ifdef IPCONFIG_BOOTP
 		if (do_bootp && (d->able & IC_BOOTP))
 			ic_bootp_send_if(d, jiffies - start_jiffies);
 #endif
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 65bcaa7..c803458 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -500,7 +500,7 @@ static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt)
 	else
 		sprintf(name, "pimreg%u", mrt->id);
 
-	dev = alloc_netdev(0, name, reg_vif_setup);
+	dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup);
 
 	if (dev == NULL)
 		return NULL;
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index a26ce03..fb17312 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -36,6 +36,16 @@ config NF_CONNTRACK_PROC_COMPAT
 
 	  If unsure, say Y.
 
+config NF_LOG_ARP
+	tristate "ARP packet logging"
+	default m if NETFILTER_ADVANCED=n
+	select NF_LOG_COMMON
+
+config NF_LOG_IPV4
+	tristate "IPv4 packet logging"
+	default m if NETFILTER_ADVANCED=n
+	select NF_LOG_COMMON
+
 config NF_TABLES_IPV4
 	depends on NF_TABLES
 	tristate "IPv4 nf_tables support"
@@ -159,25 +169,6 @@ config IP_NF_TARGET_SYNPROXY
 
 	  To compile it as a module, choose M here. If unsure, say N.
 
-config IP_NF_TARGET_ULOG
-	tristate "ULOG target support (obsolete)"
-	default m if NETFILTER_ADVANCED=n
-	---help---
-
-	  This option enables the old IPv4-only "ipt_ULOG" implementation
-	  which has been obsoleted by the new "nfnetlink_log" code (see
-	  CONFIG_NETFILTER_NETLINK_LOG).
-
-	  This option adds a `ULOG' target, which allows you to create rules in
-	  any iptables table. The packet is passed to a userspace logging
-	  daemon using netlink multicast sockets; unlike the LOG target
-	  which can only be viewed through syslog.
-
-	  The appropriate userspace logging daemon (ulogd) may be obtained from
-	  <http://www.netfilter.org/projects/ulogd/index.html>
-
-	  To compile it as a module, choose M here.  If unsure, say N.
-
 # NAT + specific targets: nf_conntrack
 config NF_NAT_IPV4
 	tristate "IPv4 NAT"
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 90b8240..3300162 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -19,6 +19,10 @@ obj-$(CONFIG_NF_NAT_IPV4) += nf_nat_ipv4.o
 # defrag
 obj-$(CONFIG_NF_DEFRAG_IPV4) += nf_defrag_ipv4.o
 
+# logging
+obj-$(CONFIG_NF_LOG_ARP) += nf_log_arp.o
+obj-$(CONFIG_NF_LOG_IPV4) += nf_log_ipv4.o
+
 # NAT helpers (nf_conntrack)
 obj-$(CONFIG_NF_NAT_H323) += nf_nat_h323.o
 obj-$(CONFIG_NF_NAT_PPTP) += nf_nat_pptp.o
@@ -53,7 +57,6 @@ obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o
 obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
 obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
 obj-$(CONFIG_IP_NF_TARGET_SYNPROXY) += ipt_SYNPROXY.o
-obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
 
 # generic ARP tables
 obj-$(CONFIG_IP_NF_ARPTABLES) += arp_tables.o
diff --git a/net/ipv4/netfilter/ipt_ULOG.c b/net/ipv4/netfilter/ipt_ULOG.c
deleted file mode 100644
index 9cb993c..0000000
--- a/net/ipv4/netfilter/ipt_ULOG.c
+++ /dev/null
@@ -1,498 +0,0 @@
-/*
- * netfilter module for userspace packet logging daemons
- *
- * (C) 2000-2004 by Harald Welte <laforge@netfilter.org>
- * (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
- * (C) 2005-2007 Patrick McHardy <kaber@trash.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This module accepts two parameters:
- *
- * nlbufsiz:
- *   The parameter specifies how big the buffer for each netlink multicast
- * group is. e.g. If you say nlbufsiz=8192, up to eight kb of packets will
- * get accumulated in the kernel until they are sent to userspace. It is
- * NOT possible to allocate more than 128kB, and it is strongly discouraged,
- * because atomically allocating 128kB inside the network rx softirq is not
- * reliable. Please also keep in mind that this buffer size is allocated for
- * each nlgroup you are using, so the total kernel memory usage increases
- * by that factor.
- *
- * Actually you should use nlbufsiz a bit smaller than PAGE_SIZE, since
- * nlbufsiz is used with alloc_skb, which adds another
- * sizeof(struct skb_shared_info).  Use NLMSG_GOODSIZE instead.
- *
- * flushtimeout:
- *   Specify, after how many hundredths of a second the queue should be
- *   flushed even if it is not full yet.
- */
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/socket.h>
-#include <linux/slab.h>
-#include <linux/skbuff.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <net/netlink.h>
-#include <linux/netdevice.h>
-#include <linux/mm.h>
-#include <linux/moduleparam.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_ipv4/ipt_ULOG.h>
-#include <net/netfilter/nf_log.h>
-#include <net/netns/generic.h>
-#include <net/sock.h>
-#include <linux/bitops.h>
-#include <asm/unaligned.h>
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
-MODULE_DESCRIPTION("Xtables: packet logging to netlink using ULOG");
-MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_NFLOG);
-
-#define ULOG_NL_EVENT		111		/* Harald's favorite number */
-#define ULOG_MAXNLGROUPS	32		/* numer of nlgroups */
-
-static unsigned int nlbufsiz = NLMSG_GOODSIZE;
-module_param(nlbufsiz, uint, 0400);
-MODULE_PARM_DESC(nlbufsiz, "netlink buffer size");
-
-static unsigned int flushtimeout = 10;
-module_param(flushtimeout, uint, 0600);
-MODULE_PARM_DESC(flushtimeout, "buffer flush timeout (hundredths of a second)");
-
-static bool nflog = true;
-module_param(nflog, bool, 0400);
-MODULE_PARM_DESC(nflog, "register as internal netfilter logging module");
-
-/* global data structures */
-
-typedef struct {
-	unsigned int qlen;		/* number of nlmsgs' in the skb */
-	struct nlmsghdr *lastnlh;	/* netlink header of last msg in skb */
-	struct sk_buff *skb;		/* the pre-allocated skb */
-	struct timer_list timer;	/* the timer function */
-} ulog_buff_t;
-
-static int ulog_net_id __read_mostly;
-struct ulog_net {
-	unsigned int nlgroup[ULOG_MAXNLGROUPS];
-	ulog_buff_t ulog_buffers[ULOG_MAXNLGROUPS];
-	struct sock *nflognl;
-	spinlock_t lock;
-};
-
-static struct ulog_net *ulog_pernet(struct net *net)
-{
-	return net_generic(net, ulog_net_id);
-}
-
-/* send one ulog_buff_t to userspace */
-static void ulog_send(struct ulog_net *ulog, unsigned int nlgroupnum)
-{
-	ulog_buff_t *ub = &ulog->ulog_buffers[nlgroupnum];
-
-	pr_debug("ulog_send: timer is deleting\n");
-	del_timer(&ub->timer);
-
-	if (!ub->skb) {
-		pr_debug("ulog_send: nothing to send\n");
-		return;
-	}
-
-	/* last nlmsg needs NLMSG_DONE */
-	if (ub->qlen > 1)
-		ub->lastnlh->nlmsg_type = NLMSG_DONE;
-
-	NETLINK_CB(ub->skb).dst_group = nlgroupnum + 1;
-	pr_debug("throwing %d packets to netlink group %u\n",
-		 ub->qlen, nlgroupnum + 1);
-	netlink_broadcast(ulog->nflognl, ub->skb, 0, nlgroupnum + 1,
-			  GFP_ATOMIC);
-
-	ub->qlen = 0;
-	ub->skb = NULL;
-	ub->lastnlh = NULL;
-}
-
-
-/* timer function to flush queue in flushtimeout time */
-static void ulog_timer(unsigned long data)
-{
-	unsigned int groupnum = *((unsigned int *)data);
-	struct ulog_net *ulog = container_of((void *)data,
-					     struct ulog_net,
-					     nlgroup[groupnum]);
-	pr_debug("timer function called, calling ulog_send\n");
-
-	/* lock to protect against somebody modifying our structure
-	 * from ipt_ulog_target at the same time */
-	spin_lock_bh(&ulog->lock);
-	ulog_send(ulog, groupnum);
-	spin_unlock_bh(&ulog->lock);
-}
-
-static struct sk_buff *ulog_alloc_skb(unsigned int size)
-{
-	struct sk_buff *skb;
-	unsigned int n;
-
-	/* alloc skb which should be big enough for a whole
-	 * multipart message. WARNING: has to be <= 131000
-	 * due to slab allocator restrictions */
-
-	n = max(size, nlbufsiz);
-	skb = alloc_skb(n, GFP_ATOMIC | __GFP_NOWARN);
-	if (!skb) {
-		if (n > size) {
-			/* try to allocate only as much as we need for
-			 * current packet */
-
-			skb = alloc_skb(size, GFP_ATOMIC);
-			if (!skb)
-				pr_debug("cannot even allocate %ub\n", size);
-		}
-	}
-
-	return skb;
-}
-
-static void ipt_ulog_packet(struct net *net,
-			    unsigned int hooknum,
-			    const struct sk_buff *skb,
-			    const struct net_device *in,
-			    const struct net_device *out,
-			    const struct ipt_ulog_info *loginfo,
-			    const char *prefix)
-{
-	ulog_buff_t *ub;
-	ulog_packet_msg_t *pm;
-	size_t size, copy_len;
-	struct nlmsghdr *nlh;
-	struct timeval tv;
-	struct ulog_net *ulog = ulog_pernet(net);
-
-	/* ffs == find first bit set, necessary because userspace
-	 * is already shifting groupnumber, but we need unshifted.
-	 * ffs() returns [1..32], we need [0..31] */
-	unsigned int groupnum = ffs(loginfo->nl_group) - 1;
-
-	/* calculate the size of the skb needed */
-	if (loginfo->copy_range == 0 || loginfo->copy_range > skb->len)
-		copy_len = skb->len;
-	else
-		copy_len = loginfo->copy_range;
-
-	size = nlmsg_total_size(sizeof(*pm) + copy_len);
-
-	ub = &ulog->ulog_buffers[groupnum];
-
-	spin_lock_bh(&ulog->lock);
-
-	if (!ub->skb) {
-		if (!(ub->skb = ulog_alloc_skb(size)))
-			goto alloc_failure;
-	} else if (ub->qlen >= loginfo->qthreshold ||
-		   size > skb_tailroom(ub->skb)) {
-		/* either the queue len is too high or we don't have
-		 * enough room in nlskb left. send it to userspace. */
-
-		ulog_send(ulog, groupnum);
-
-		if (!(ub->skb = ulog_alloc_skb(size)))
-			goto alloc_failure;
-	}
-
-	pr_debug("qlen %d, qthreshold %Zu\n", ub->qlen, loginfo->qthreshold);
-
-	nlh = nlmsg_put(ub->skb, 0, ub->qlen, ULOG_NL_EVENT,
-			sizeof(*pm)+copy_len, 0);
-	if (!nlh) {
-		pr_debug("error during nlmsg_put\n");
-		goto out_unlock;
-	}
-	ub->qlen++;
-
-	pm = nlmsg_data(nlh);
-	memset(pm, 0, sizeof(*pm));
-
-	/* We might not have a timestamp, get one */
-	if (skb->tstamp.tv64 == 0)
-		__net_timestamp((struct sk_buff *)skb);
-
-	/* copy hook, prefix, timestamp, payload, etc. */
-	pm->data_len = copy_len;
-	tv = ktime_to_timeval(skb->tstamp);
-	put_unaligned(tv.tv_sec, &pm->timestamp_sec);
-	put_unaligned(tv.tv_usec, &pm->timestamp_usec);
-	put_unaligned(skb->mark, &pm->mark);
-	pm->hook = hooknum;
-	if (prefix != NULL) {
-		strncpy(pm->prefix, prefix, sizeof(pm->prefix) - 1);
-		pm->prefix[sizeof(pm->prefix) - 1] = '\0';
-	}
-	else if (loginfo->prefix[0] != '\0')
-		strncpy(pm->prefix, loginfo->prefix, sizeof(pm->prefix));
-
-	if (in && in->hard_header_len > 0 &&
-	    skb->mac_header != skb->network_header &&
-	    in->hard_header_len <= ULOG_MAC_LEN) {
-		memcpy(pm->mac, skb_mac_header(skb), in->hard_header_len);
-		pm->mac_len = in->hard_header_len;
-	} else
-		pm->mac_len = 0;
-
-	if (in)
-		strncpy(pm->indev_name, in->name, sizeof(pm->indev_name));
-
-	if (out)
-		strncpy(pm->outdev_name, out->name, sizeof(pm->outdev_name));
-
-	/* copy_len <= skb->len, so can't fail. */
-	if (skb_copy_bits(skb, 0, pm->payload, copy_len) < 0)
-		BUG();
-
-	/* check if we are building multi-part messages */
-	if (ub->qlen > 1)
-		ub->lastnlh->nlmsg_flags |= NLM_F_MULTI;
-
-	ub->lastnlh = nlh;
-
-	/* if timer isn't already running, start it */
-	if (!timer_pending(&ub->timer)) {
-		ub->timer.expires = jiffies + flushtimeout * HZ / 100;
-		add_timer(&ub->timer);
-	}
-
-	/* if threshold is reached, send message to userspace */
-	if (ub->qlen >= loginfo->qthreshold) {
-		if (loginfo->qthreshold > 1)
-			nlh->nlmsg_type = NLMSG_DONE;
-		ulog_send(ulog, groupnum);
-	}
-out_unlock:
-	spin_unlock_bh(&ulog->lock);
-
-	return;
-
-alloc_failure:
-	pr_debug("Error building netlink message\n");
-	spin_unlock_bh(&ulog->lock);
-}
-
-static unsigned int
-ulog_tg(struct sk_buff *skb, const struct xt_action_param *par)
-{
-	struct net *net = dev_net(par->in ? par->in : par->out);
-
-	ipt_ulog_packet(net, par->hooknum, skb, par->in, par->out,
-	                par->targinfo, NULL);
-	return XT_CONTINUE;
-}
-
-static void ipt_logfn(struct net *net,
-		      u_int8_t pf,
-		      unsigned int hooknum,
-		      const struct sk_buff *skb,
-		      const struct net_device *in,
-		      const struct net_device *out,
-		      const struct nf_loginfo *li,
-		      const char *prefix)
-{
-	struct ipt_ulog_info loginfo;
-
-	if (!li || li->type != NF_LOG_TYPE_ULOG) {
-		loginfo.nl_group = ULOG_DEFAULT_NLGROUP;
-		loginfo.copy_range = 0;
-		loginfo.qthreshold = ULOG_DEFAULT_QTHRESHOLD;
-		loginfo.prefix[0] = '\0';
-	} else {
-		loginfo.nl_group = li->u.ulog.group;
-		loginfo.copy_range = li->u.ulog.copy_len;
-		loginfo.qthreshold = li->u.ulog.qthreshold;
-		strlcpy(loginfo.prefix, prefix, sizeof(loginfo.prefix));
-	}
-
-	ipt_ulog_packet(net, hooknum, skb, in, out, &loginfo, prefix);
-}
-
-static int ulog_tg_check(const struct xt_tgchk_param *par)
-{
-	const struct ipt_ulog_info *loginfo = par->targinfo;
-
-	if (!par->net->xt.ulog_warn_deprecated) {
-		pr_info("ULOG is deprecated and it will be removed soon, "
-			"use NFLOG instead\n");
-		par->net->xt.ulog_warn_deprecated = true;
-	}
-
-	if (loginfo->prefix[sizeof(loginfo->prefix) - 1] != '\0') {
-		pr_debug("prefix not null-terminated\n");
-		return -EINVAL;
-	}
-	if (loginfo->qthreshold > ULOG_MAX_QLEN) {
-		pr_debug("queue threshold %Zu > MAX_QLEN\n",
-			 loginfo->qthreshold);
-		return -EINVAL;
-	}
-	return 0;
-}
-
-#ifdef CONFIG_COMPAT
-struct compat_ipt_ulog_info {
-	compat_uint_t	nl_group;
-	compat_size_t	copy_range;
-	compat_size_t	qthreshold;
-	char		prefix[ULOG_PREFIX_LEN];
-};
-
-static void ulog_tg_compat_from_user(void *dst, const void *src)
-{
-	const struct compat_ipt_ulog_info *cl = src;
-	struct ipt_ulog_info l = {
-		.nl_group	= cl->nl_group,
-		.copy_range	= cl->copy_range,
-		.qthreshold	= cl->qthreshold,
-	};
-
-	memcpy(l.prefix, cl->prefix, sizeof(l.prefix));
-	memcpy(dst, &l, sizeof(l));
-}
-
-static int ulog_tg_compat_to_user(void __user *dst, const void *src)
-{
-	const struct ipt_ulog_info *l = src;
-	struct compat_ipt_ulog_info cl = {
-		.nl_group	= l->nl_group,
-		.copy_range	= l->copy_range,
-		.qthreshold	= l->qthreshold,
-	};
-
-	memcpy(cl.prefix, l->prefix, sizeof(cl.prefix));
-	return copy_to_user(dst, &cl, sizeof(cl)) ? -EFAULT : 0;
-}
-#endif /* CONFIG_COMPAT */
-
-static struct xt_target ulog_tg_reg __read_mostly = {
-	.name		= "ULOG",
-	.family		= NFPROTO_IPV4,
-	.target		= ulog_tg,
-	.targetsize	= sizeof(struct ipt_ulog_info),
-	.checkentry	= ulog_tg_check,
-#ifdef CONFIG_COMPAT
-	.compatsize	= sizeof(struct compat_ipt_ulog_info),
-	.compat_from_user = ulog_tg_compat_from_user,
-	.compat_to_user	= ulog_tg_compat_to_user,
-#endif
-	.me		= THIS_MODULE,
-};
-
-static struct nf_logger ipt_ulog_logger __read_mostly = {
-	.name		= "ipt_ULOG",
-	.logfn		= ipt_logfn,
-	.me		= THIS_MODULE,
-};
-
-static int __net_init ulog_tg_net_init(struct net *net)
-{
-	int i;
-	struct ulog_net *ulog = ulog_pernet(net);
-	struct netlink_kernel_cfg cfg = {
-		.groups	= ULOG_MAXNLGROUPS,
-	};
-
-	spin_lock_init(&ulog->lock);
-	/* initialize ulog_buffers */
-	for (i = 0; i < ULOG_MAXNLGROUPS; i++) {
-		ulog->nlgroup[i] = i;
-		setup_timer(&ulog->ulog_buffers[i].timer, ulog_timer,
-			    (unsigned long)&ulog->nlgroup[i]);
-	}
-
-	ulog->nflognl = netlink_kernel_create(net, NETLINK_NFLOG, &cfg);
-	if (!ulog->nflognl)
-		return -ENOMEM;
-
-	if (nflog)
-		nf_log_set(net, NFPROTO_IPV4, &ipt_ulog_logger);
-
-	return 0;
-}
-
-static void __net_exit ulog_tg_net_exit(struct net *net)
-{
-	ulog_buff_t *ub;
-	int i;
-	struct ulog_net *ulog = ulog_pernet(net);
-
-	if (nflog)
-		nf_log_unset(net, &ipt_ulog_logger);
-
-	netlink_kernel_release(ulog->nflognl);
-
-	/* remove pending timers and free allocated skb's */
-	for (i = 0; i < ULOG_MAXNLGROUPS; i++) {
-		ub = &ulog->ulog_buffers[i];
-		pr_debug("timer is deleting\n");
-		del_timer(&ub->timer);
-
-		if (ub->skb) {
-			kfree_skb(ub->skb);
-			ub->skb = NULL;
-		}
-	}
-}
-
-static struct pernet_operations ulog_tg_net_ops = {
-	.init = ulog_tg_net_init,
-	.exit = ulog_tg_net_exit,
-	.id   = &ulog_net_id,
-	.size = sizeof(struct ulog_net),
-};
-
-static int __init ulog_tg_init(void)
-{
-	int ret;
-	pr_debug("init module\n");
-
-	if (nlbufsiz > 128*1024) {
-		pr_warn("Netlink buffer has to be <= 128kB\n");
-		return -EINVAL;
-	}
-
-	ret = register_pernet_subsys(&ulog_tg_net_ops);
-	if (ret)
-		goto out_pernet;
-
-	ret = xt_register_target(&ulog_tg_reg);
-	if (ret < 0)
-		goto out_target;
-
-	if (nflog)
-		nf_log_register(NFPROTO_IPV4, &ipt_ulog_logger);
-
-	return 0;
-
-out_target:
-	unregister_pernet_subsys(&ulog_tg_net_ops);
-out_pernet:
-	return ret;
-}
-
-static void __exit ulog_tg_exit(void)
-{
-	pr_debug("cleanup_module\n");
-	if (nflog)
-		nf_log_unregister(&ipt_ulog_logger);
-	xt_unregister_target(&ulog_tg_reg);
-	unregister_pernet_subsys(&ulog_tg_net_ops);
-}
-
-module_init(ulog_tg_init);
-module_exit(ulog_tg_exit);
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index 8127dc8..a054fe0 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -314,7 +314,7 @@ getorigdst(struct sock *sk, int optval, void __user *user, int *len)
 	return -ENOENT;
 }
 
-#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 
 #include <linux/netfilter/nfnetlink.h>
 #include <linux/netfilter/nfnetlink_conntrack.h>
@@ -358,7 +358,7 @@ static struct nf_sockopt_ops so_getorigdst = {
 	.pf		= PF_INET,
 	.get_optmin	= SO_ORIGINAL_DST,
 	.get_optmax	= SO_ORIGINAL_DST+1,
-	.get		= &getorigdst,
+	.get		= getorigdst,
 	.owner		= THIS_MODULE,
 };
 
@@ -388,7 +388,7 @@ struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 __read_mostly = {
 	.invert_tuple	 = ipv4_invert_tuple,
 	.print_tuple	 = ipv4_print_tuple,
 	.get_l4proto	 = ipv4_get_l4proto,
-#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 	.tuple_to_nlattr = ipv4_tuple_to_nlattr,
 	.nlattr_tuple_size = ipv4_nlattr_tuple_size,
 	.nlattr_to_tuple = ipv4_nlattr_to_tuple,
diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
index a338dad..b91b264 100644
--- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
@@ -226,7 +226,7 @@ icmp_error(struct net *net, struct nf_conn *tmpl,
 	return icmp_error_message(net, tmpl, skb, ctinfo, hooknum);
 }
 
-#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 
 #include <linux/netfilter/nfnetlink.h>
 #include <linux/netfilter/nfnetlink_conntrack.h>
@@ -408,7 +408,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp __read_mostly =
 	.error			= icmp_error,
 	.destroy		= NULL,
 	.me			= NULL,
-#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 	.tuple_to_nlattr	= icmp_tuple_to_nlattr,
 	.nlattr_tuple_size	= icmp_nlattr_tuple_size,
 	.nlattr_to_tuple	= icmp_nlattr_to_tuple,
diff --git a/net/ipv4/netfilter/nf_defrag_ipv4.c b/net/ipv4/netfilter/nf_defrag_ipv4.c
index b8f6381..76bd1ae 100644
--- a/net/ipv4/netfilter/nf_defrag_ipv4.c
+++ b/net/ipv4/netfilter/nf_defrag_ipv4.c
@@ -17,7 +17,7 @@
 #include <linux/netfilter_bridge.h>
 #include <linux/netfilter_ipv4.h>
 #include <net/netfilter/ipv4/nf_defrag_ipv4.h>
-#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
 #include <net/netfilter/nf_conntrack.h>
 #endif
 #include <net/netfilter/nf_conntrack_zones.h>
@@ -45,7 +45,7 @@ static enum ip_defrag_users nf_ct_defrag_user(unsigned int hooknum,
 {
 	u16 zone = NF_CT_DEFAULT_ZONE;
 
-#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
 	if (skb->nfct)
 		zone = nf_ct_zone((struct nf_conn *)skb->nfct);
 #endif
@@ -74,8 +74,8 @@ static unsigned int ipv4_conntrack_defrag(const struct nf_hook_ops *ops,
 	    inet->nodefrag)
 		return NF_ACCEPT;
 
-#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
-#if !defined(CONFIG_NF_NAT) && !defined(CONFIG_NF_NAT_MODULE)
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
+#if !IS_ENABLED(CONFIG_NF_NAT)
 	/* Previously seen (loopback)?  Ignore.  Do this before
 	   fragment check. */
 	if (skb->nfct && !nf_ct_is_template((struct nf_conn *)skb->nfct))
diff --git a/net/ipv4/netfilter/nf_log_arp.c b/net/ipv4/netfilter/nf_log_arp.c
new file mode 100644
index 0000000..ccfc78d
--- /dev/null
+++ b/net/ipv4/netfilter/nf_log_arp.c
@@ -0,0 +1,149 @@
+/*
+ * (C) 2014 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * Based on code from ebt_log from:
+ *
+ * Bart De Schuymer <bdschuym@pandora.be>
+ * Harald Welte <laforge@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/ip.h>
+#include <net/route.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/xt_LOG.h>
+#include <net/netfilter/nf_log.h>
+
+static struct nf_loginfo default_loginfo = {
+	.type	= NF_LOG_TYPE_LOG,
+	.u = {
+		.log = {
+			.level	  = 5,
+			.logflags = NF_LOG_MASK,
+		},
+	},
+};
+
+struct arppayload {
+	unsigned char mac_src[ETH_ALEN];
+	unsigned char ip_src[4];
+	unsigned char mac_dst[ETH_ALEN];
+	unsigned char ip_dst[4];
+};
+
+static void dump_arp_packet(struct nf_log_buf *m,
+			    const struct nf_loginfo *info,
+			    const struct sk_buff *skb, unsigned int nhoff)
+{
+	const struct arphdr *ah;
+	struct arphdr _arph;
+	const struct arppayload *ap;
+	struct arppayload _arpp;
+
+	ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
+	if (ah == NULL) {
+		nf_log_buf_add(m, "TRUNCATED");
+		return;
+	}
+	nf_log_buf_add(m, "ARP HTYPE=%d PTYPE=0x%04x OPCODE=%d",
+		       ntohs(ah->ar_hrd), ntohs(ah->ar_pro), ntohs(ah->ar_op));
+
+	/* If it's for Ethernet and the lengths are OK, then log the ARP
+	 * payload.
+	 */
+	if (ah->ar_hrd != htons(1) ||
+	    ah->ar_hln != ETH_ALEN ||
+	    ah->ar_pln != sizeof(__be32))
+		return;
+
+	ap = skb_header_pointer(skb, sizeof(_arph), sizeof(_arpp), &_arpp);
+	if (ap == NULL) {
+		nf_log_buf_add(m, " INCOMPLETE [%Zu bytes]",
+			       skb->len - sizeof(_arph));
+		return;
+	}
+	nf_log_buf_add(m, " MACSRC=%pM IPSRC=%pI4 MACDST=%pM IPDST=%pI4",
+		       ap->mac_src, ap->ip_src, ap->mac_dst, ap->ip_dst);
+}
+
+void nf_log_arp_packet(struct net *net, u_int8_t pf,
+		      unsigned int hooknum, const struct sk_buff *skb,
+		      const struct net_device *in,
+		      const struct net_device *out,
+		      const struct nf_loginfo *loginfo,
+		      const char *prefix)
+{
+	struct nf_log_buf *m;
+
+	/* FIXME: Disabled from containers until syslog ns is supported */
+	if (!net_eq(net, &init_net))
+		return;
+
+	m = nf_log_buf_open();
+
+	if (!loginfo)
+		loginfo = &default_loginfo;
+
+	nf_log_dump_packet_common(m, pf, hooknum, skb, in, out, loginfo,
+				  prefix);
+	dump_arp_packet(m, loginfo, skb, 0);
+
+	nf_log_buf_close(m);
+}
+
+static struct nf_logger nf_arp_logger __read_mostly = {
+	.name		= "nf_log_arp",
+	.type		= NF_LOG_TYPE_LOG,
+	.logfn		= nf_log_arp_packet,
+	.me		= THIS_MODULE,
+};
+
+static int __net_init nf_log_arp_net_init(struct net *net)
+{
+	nf_log_set(net, NFPROTO_ARP, &nf_arp_logger);
+	return 0;
+}
+
+static void __net_exit nf_log_arp_net_exit(struct net *net)
+{
+	nf_log_unset(net, &nf_arp_logger);
+}
+
+static struct pernet_operations nf_log_arp_net_ops = {
+	.init = nf_log_arp_net_init,
+	.exit = nf_log_arp_net_exit,
+};
+
+static int __init nf_log_arp_init(void)
+{
+	int ret;
+
+	ret = register_pernet_subsys(&nf_log_arp_net_ops);
+	if (ret < 0)
+		return ret;
+
+	nf_log_register(NFPROTO_ARP, &nf_arp_logger);
+	return 0;
+}
+
+static void __exit nf_log_arp_exit(void)
+{
+	unregister_pernet_subsys(&nf_log_arp_net_ops);
+	nf_log_unregister(&nf_arp_logger);
+}
+
+module_init(nf_log_arp_init);
+module_exit(nf_log_arp_exit);
+
+MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
+MODULE_DESCRIPTION("Netfilter ARP packet logging");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NF_LOGGER(3, 0);
diff --git a/net/ipv4/netfilter/nf_log_ipv4.c b/net/ipv4/netfilter/nf_log_ipv4.c
new file mode 100644
index 0000000..078bdca
--- /dev/null
+++ b/net/ipv4/netfilter/nf_log_ipv4.c
@@ -0,0 +1,385 @@
+/* (C) 1999-2001 Paul `Rusty' Russell
+ * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/ip.h>
+#include <net/ipv6.h>
+#include <net/icmp.h>
+#include <net/udp.h>
+#include <net/tcp.h>
+#include <net/route.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/xt_LOG.h>
+#include <net/netfilter/nf_log.h>
+
+static struct nf_loginfo default_loginfo = {
+	.type	= NF_LOG_TYPE_LOG,
+	.u = {
+		.log = {
+			.level	  = 5,
+			.logflags = NF_LOG_MASK,
+		},
+	},
+};
+
+/* One level of recursion won't kill us */
+static void dump_ipv4_packet(struct nf_log_buf *m,
+			     const struct nf_loginfo *info,
+			     const struct sk_buff *skb, unsigned int iphoff)
+{
+	struct iphdr _iph;
+	const struct iphdr *ih;
+	unsigned int logflags;
+
+	if (info->type == NF_LOG_TYPE_LOG)
+		logflags = info->u.log.logflags;
+	else
+		logflags = NF_LOG_MASK;
+
+	ih = skb_header_pointer(skb, iphoff, sizeof(_iph), &_iph);
+	if (ih == NULL) {
+		nf_log_buf_add(m, "TRUNCATED");
+		return;
+	}
+
+	/* 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 " */
+	nf_log_buf_add(m, "SRC=%pI4 DST=%pI4 ", &ih->saddr, &ih->daddr);
+
+	/* Max length: 46 "LEN=65535 TOS=0xFF PREC=0xFF TTL=255 ID=65535 " */
+	nf_log_buf_add(m, "LEN=%u TOS=0x%02X PREC=0x%02X TTL=%u ID=%u ",
+		       ntohs(ih->tot_len), ih->tos & IPTOS_TOS_MASK,
+		       ih->tos & IPTOS_PREC_MASK, ih->ttl, ntohs(ih->id));
+
+	/* Max length: 6 "CE DF MF " */
+	if (ntohs(ih->frag_off) & IP_CE)
+		nf_log_buf_add(m, "CE ");
+	if (ntohs(ih->frag_off) & IP_DF)
+		nf_log_buf_add(m, "DF ");
+	if (ntohs(ih->frag_off) & IP_MF)
+		nf_log_buf_add(m, "MF ");
+
+	/* Max length: 11 "FRAG:65535 " */
+	if (ntohs(ih->frag_off) & IP_OFFSET)
+		nf_log_buf_add(m, "FRAG:%u ", ntohs(ih->frag_off) & IP_OFFSET);
+
+	if ((logflags & XT_LOG_IPOPT) &&
+	    ih->ihl * 4 > sizeof(struct iphdr)) {
+		const unsigned char *op;
+		unsigned char _opt[4 * 15 - sizeof(struct iphdr)];
+		unsigned int i, optsize;
+
+		optsize = ih->ihl * 4 - sizeof(struct iphdr);
+		op = skb_header_pointer(skb, iphoff+sizeof(_iph),
+					optsize, _opt);
+		if (op == NULL) {
+			nf_log_buf_add(m, "TRUNCATED");
+			return;
+		}
+
+		/* Max length: 127 "OPT (" 15*4*2chars ") " */
+		nf_log_buf_add(m, "OPT (");
+		for (i = 0; i < optsize; i++)
+			nf_log_buf_add(m, "%02X", op[i]);
+		nf_log_buf_add(m, ") ");
+	}
+
+	switch (ih->protocol) {
+	case IPPROTO_TCP:
+		if (nf_log_dump_tcp_header(m, skb, ih->protocol,
+					   ntohs(ih->frag_off) & IP_OFFSET,
+					   iphoff+ih->ihl*4, logflags))
+			return;
+		break;
+	case IPPROTO_UDP:
+	case IPPROTO_UDPLITE:
+		if (nf_log_dump_udp_header(m, skb, ih->protocol,
+					   ntohs(ih->frag_off) & IP_OFFSET,
+					   iphoff+ih->ihl*4))
+			return;
+		break;
+	case IPPROTO_ICMP: {
+		struct icmphdr _icmph;
+		const struct icmphdr *ich;
+		static const size_t required_len[NR_ICMP_TYPES+1]
+			= { [ICMP_ECHOREPLY] = 4,
+			    [ICMP_DEST_UNREACH]
+			    = 8 + sizeof(struct iphdr),
+			    [ICMP_SOURCE_QUENCH]
+			    = 8 + sizeof(struct iphdr),
+			    [ICMP_REDIRECT]
+			    = 8 + sizeof(struct iphdr),
+			    [ICMP_ECHO] = 4,
+			    [ICMP_TIME_EXCEEDED]
+			    = 8 + sizeof(struct iphdr),
+			    [ICMP_PARAMETERPROB]
+			    = 8 + sizeof(struct iphdr),
+			    [ICMP_TIMESTAMP] = 20,
+			    [ICMP_TIMESTAMPREPLY] = 20,
+			    [ICMP_ADDRESS] = 12,
+			    [ICMP_ADDRESSREPLY] = 12 };
+
+		/* Max length: 11 "PROTO=ICMP " */
+		nf_log_buf_add(m, "PROTO=ICMP ");
+
+		if (ntohs(ih->frag_off) & IP_OFFSET)
+			break;
+
+		/* Max length: 25 "INCOMPLETE [65535 bytes] " */
+		ich = skb_header_pointer(skb, iphoff + ih->ihl * 4,
+					 sizeof(_icmph), &_icmph);
+		if (ich == NULL) {
+			nf_log_buf_add(m, "INCOMPLETE [%u bytes] ",
+				       skb->len - iphoff - ih->ihl*4);
+			break;
+		}
+
+		/* Max length: 18 "TYPE=255 CODE=255 " */
+		nf_log_buf_add(m, "TYPE=%u CODE=%u ", ich->type, ich->code);
+
+		/* Max length: 25 "INCOMPLETE [65535 bytes] " */
+		if (ich->type <= NR_ICMP_TYPES &&
+		    required_len[ich->type] &&
+		    skb->len-iphoff-ih->ihl*4 < required_len[ich->type]) {
+			nf_log_buf_add(m, "INCOMPLETE [%u bytes] ",
+				       skb->len - iphoff - ih->ihl*4);
+			break;
+		}
+
+		switch (ich->type) {
+		case ICMP_ECHOREPLY:
+		case ICMP_ECHO:
+			/* Max length: 19 "ID=65535 SEQ=65535 " */
+			nf_log_buf_add(m, "ID=%u SEQ=%u ",
+				       ntohs(ich->un.echo.id),
+				       ntohs(ich->un.echo.sequence));
+			break;
+
+		case ICMP_PARAMETERPROB:
+			/* Max length: 14 "PARAMETER=255 " */
+			nf_log_buf_add(m, "PARAMETER=%u ",
+				       ntohl(ich->un.gateway) >> 24);
+			break;
+		case ICMP_REDIRECT:
+			/* Max length: 24 "GATEWAY=255.255.255.255 " */
+			nf_log_buf_add(m, "GATEWAY=%pI4 ", &ich->un.gateway);
+			/* Fall through */
+		case ICMP_DEST_UNREACH:
+		case ICMP_SOURCE_QUENCH:
+		case ICMP_TIME_EXCEEDED:
+			/* Max length: 3+maxlen */
+			if (!iphoff) { /* Only recurse once. */
+				nf_log_buf_add(m, "[");
+				dump_ipv4_packet(m, info, skb,
+					    iphoff + ih->ihl*4+sizeof(_icmph));
+				nf_log_buf_add(m, "] ");
+			}
+
+			/* Max length: 10 "MTU=65535 " */
+			if (ich->type == ICMP_DEST_UNREACH &&
+			    ich->code == ICMP_FRAG_NEEDED) {
+				nf_log_buf_add(m, "MTU=%u ",
+					       ntohs(ich->un.frag.mtu));
+			}
+		}
+		break;
+	}
+	/* Max Length */
+	case IPPROTO_AH: {
+		struct ip_auth_hdr _ahdr;
+		const struct ip_auth_hdr *ah;
+
+		if (ntohs(ih->frag_off) & IP_OFFSET)
+			break;
+
+		/* Max length: 9 "PROTO=AH " */
+		nf_log_buf_add(m, "PROTO=AH ");
+
+		/* Max length: 25 "INCOMPLETE [65535 bytes] " */
+		ah = skb_header_pointer(skb, iphoff+ih->ihl*4,
+					sizeof(_ahdr), &_ahdr);
+		if (ah == NULL) {
+			nf_log_buf_add(m, "INCOMPLETE [%u bytes] ",
+				       skb->len - iphoff - ih->ihl*4);
+			break;
+		}
+
+		/* Length: 15 "SPI=0xF1234567 " */
+		nf_log_buf_add(m, "SPI=0x%x ", ntohl(ah->spi));
+		break;
+	}
+	case IPPROTO_ESP: {
+		struct ip_esp_hdr _esph;
+		const struct ip_esp_hdr *eh;
+
+		/* Max length: 10 "PROTO=ESP " */
+		nf_log_buf_add(m, "PROTO=ESP ");
+
+		if (ntohs(ih->frag_off) & IP_OFFSET)
+			break;
+
+		/* Max length: 25 "INCOMPLETE [65535 bytes] " */
+		eh = skb_header_pointer(skb, iphoff+ih->ihl*4,
+					sizeof(_esph), &_esph);
+		if (eh == NULL) {
+			nf_log_buf_add(m, "INCOMPLETE [%u bytes] ",
+				       skb->len - iphoff - ih->ihl*4);
+			break;
+		}
+
+		/* Length: 15 "SPI=0xF1234567 " */
+		nf_log_buf_add(m, "SPI=0x%x ", ntohl(eh->spi));
+		break;
+	}
+	/* Max length: 10 "PROTO 255 " */
+	default:
+		nf_log_buf_add(m, "PROTO=%u ", ih->protocol);
+	}
+
+	/* Max length: 15 "UID=4294967295 " */
+	if ((logflags & XT_LOG_UID) && !iphoff)
+		nf_log_dump_sk_uid_gid(m, skb->sk);
+
+	/* Max length: 16 "MARK=0xFFFFFFFF " */
+	if (!iphoff && skb->mark)
+		nf_log_buf_add(m, "MARK=0x%x ", skb->mark);
+
+	/* Proto    Max log string length */
+	/* IP:	    40+46+6+11+127 = 230 */
+	/* TCP:     10+max(25,20+30+13+9+32+11+127) = 252 */
+	/* UDP:     10+max(25,20) = 35 */
+	/* UDPLITE: 14+max(25,20) = 39 */
+	/* ICMP:    11+max(25, 18+25+max(19,14,24+3+n+10,3+n+10)) = 91+n */
+	/* ESP:     10+max(25)+15 = 50 */
+	/* AH:	    9+max(25)+15 = 49 */
+	/* unknown: 10 */
+
+	/* (ICMP allows recursion one level deep) */
+	/* maxlen =  IP + ICMP +  IP + max(TCP,UDP,ICMP,unknown) */
+	/* maxlen = 230+   91  + 230 + 252 = 803 */
+}
+
+static void dump_ipv4_mac_header(struct nf_log_buf *m,
+			    const struct nf_loginfo *info,
+			    const struct sk_buff *skb)
+{
+	struct net_device *dev = skb->dev;
+	unsigned int logflags = 0;
+
+	if (info->type == NF_LOG_TYPE_LOG)
+		logflags = info->u.log.logflags;
+
+	if (!(logflags & XT_LOG_MACDECODE))
+		goto fallback;
+
+	switch (dev->type) {
+	case ARPHRD_ETHER:
+		nf_log_buf_add(m, "MACSRC=%pM MACDST=%pM MACPROTO=%04x ",
+			       eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
+			       ntohs(eth_hdr(skb)->h_proto));
+		return;
+	default:
+		break;
+	}
+
+fallback:
+	nf_log_buf_add(m, "MAC=");
+	if (dev->hard_header_len &&
+	    skb->mac_header != skb->network_header) {
+		const unsigned char *p = skb_mac_header(skb);
+		unsigned int i;
+
+		nf_log_buf_add(m, "%02x", *p++);
+		for (i = 1; i < dev->hard_header_len; i++, p++)
+			nf_log_buf_add(m, ":%02x", *p);
+	}
+	nf_log_buf_add(m, " ");
+}
+
+static void nf_log_ip_packet(struct net *net, u_int8_t pf,
+			     unsigned int hooknum, const struct sk_buff *skb,
+			     const struct net_device *in,
+			     const struct net_device *out,
+			     const struct nf_loginfo *loginfo,
+			     const char *prefix)
+{
+	struct nf_log_buf *m;
+
+	/* FIXME: Disabled from containers until syslog ns is supported */
+	if (!net_eq(net, &init_net))
+		return;
+
+	m = nf_log_buf_open();
+
+	if (!loginfo)
+		loginfo = &default_loginfo;
+
+	nf_log_dump_packet_common(m, pf, hooknum, skb, in,
+				  out, loginfo, prefix);
+
+	if (in != NULL)
+		dump_ipv4_mac_header(m, loginfo, skb);
+
+	dump_ipv4_packet(m, loginfo, skb, 0);
+
+	nf_log_buf_close(m);
+}
+
+static struct nf_logger nf_ip_logger __read_mostly = {
+	.name		= "nf_log_ipv4",
+	.type		= NF_LOG_TYPE_LOG,
+	.logfn		= nf_log_ip_packet,
+	.me		= THIS_MODULE,
+};
+
+static int __net_init nf_log_ipv4_net_init(struct net *net)
+{
+	nf_log_set(net, NFPROTO_IPV4, &nf_ip_logger);
+	return 0;
+}
+
+static void __net_exit nf_log_ipv4_net_exit(struct net *net)
+{
+	nf_log_unset(net, &nf_ip_logger);
+}
+
+static struct pernet_operations nf_log_ipv4_net_ops = {
+	.init = nf_log_ipv4_net_init,
+	.exit = nf_log_ipv4_net_exit,
+};
+
+static int __init nf_log_ipv4_init(void)
+{
+	int ret;
+
+	ret = register_pernet_subsys(&nf_log_ipv4_net_ops);
+	if (ret < 0)
+		return ret;
+
+	nf_log_register(NFPROTO_IPV4, &nf_ip_logger);
+	return 0;
+}
+
+static void __exit nf_log_ipv4_exit(void)
+{
+	unregister_pernet_subsys(&nf_log_ipv4_net_ops);
+	nf_log_unregister(&nf_ip_logger);
+}
+
+module_init(nf_log_ipv4_init);
+module_exit(nf_log_ipv4_exit);
+
+MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
+MODULE_DESCRIPTION("Netfilter IPv4 packet logging");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NF_LOGGER(AF_INET, 0);
diff --git a/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c b/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c
index d8b2e14..14f5ccd 100644
--- a/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c
@@ -154,6 +154,7 @@ static void nf_nat_ipv4_csum_recalc(struct sk_buff *skb,
 					 htons(oldlen), htons(datalen), 1);
 }
 
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 static int nf_nat_ipv4_nlattr_to_range(struct nlattr *tb[],
 				       struct nf_nat_range *range)
 {
@@ -169,6 +170,7 @@ static int nf_nat_ipv4_nlattr_to_range(struct nlattr *tb[],
 
 	return 0;
 }
+#endif
 
 static const struct nf_nat_l3proto nf_nat_l3proto_ipv4 = {
 	.l3proto		= NFPROTO_IPV4,
@@ -177,7 +179,9 @@ static const struct nf_nat_l3proto nf_nat_l3proto_ipv4 = {
 	.manip_pkt		= nf_nat_ipv4_manip_pkt,
 	.csum_update		= nf_nat_ipv4_csum_update,
 	.csum_recalc		= nf_nat_ipv4_csum_recalc,
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 	.nlattr_to_range	= nf_nat_ipv4_nlattr_to_range,
+#endif
 #ifdef CONFIG_XFRM
 	.decode_session		= nf_nat_ipv4_decode_session,
 #endif
diff --git a/net/ipv4/netfilter/nf_nat_proto_gre.c b/net/ipv4/netfilter/nf_nat_proto_gre.c
index 690d8901..9414923 100644
--- a/net/ipv4/netfilter/nf_nat_proto_gre.c
+++ b/net/ipv4/netfilter/nf_nat_proto_gre.c
@@ -124,7 +124,7 @@ static const struct nf_nat_l4proto gre = {
 	.manip_pkt		= gre_manip_pkt,
 	.in_range		= nf_nat_l4proto_in_range,
 	.unique_tuple		= gre_unique_tuple,
-#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 	.nlattr_to_range	= nf_nat_l4proto_nlattr_to_range,
 #endif
 };
diff --git a/net/ipv4/netfilter/nf_nat_proto_icmp.c b/net/ipv4/netfilter/nf_nat_proto_icmp.c
index eb30347..4557b4a 100644
--- a/net/ipv4/netfilter/nf_nat_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_nat_proto_icmp.c
@@ -77,7 +77,7 @@ const struct nf_nat_l4proto nf_nat_l4proto_icmp = {
 	.manip_pkt		= icmp_manip_pkt,
 	.in_range		= icmp_in_range,
 	.unique_tuple		= icmp_unique_tuple,
-#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 	.nlattr_to_range	= nf_nat_l4proto_nlattr_to_range,
 #endif
 };
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index 044a0dd..a3c59a0 100644
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -911,7 +911,7 @@ int ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 				sin6->sin6_flowinfo = ip6_flowinfo(ip6);
 			sin6->sin6_scope_id =
 				ipv6_iface_scope_id(&sin6->sin6_addr,
-						    IP6CB(skb)->iif);
+						    inet6_iif(skb));
 			*addr_len = sizeof(*sin6);
 		}
 
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index ae0af93..8e3eb39 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -52,6 +52,7 @@
 static int sockstat_seq_show(struct seq_file *seq, void *v)
 {
 	struct net *net = seq->private;
+	unsigned int frag_mem;
 	int orphans, sockets;
 
 	local_bh_disable();
@@ -71,8 +72,8 @@ static int sockstat_seq_show(struct seq_file *seq, void *v)
 		   sock_prot_inuse_get(net, &udplite_prot));
 	seq_printf(seq, "RAW: inuse %d\n",
 		   sock_prot_inuse_get(net, &raw_prot));
-	seq_printf(seq,  "FRAG: inuse %d memory %d\n",
-			ip_frag_nqueues(net), ip_frag_mem(net));
+	frag_mem = ip_frag_mem(net);
+	seq_printf(seq,  "FRAG: inuse %u memory %u\n", !!frag_mem, frag_mem);
 	return 0;
 }
 
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 2c65160..739db31 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -58,6 +58,7 @@
 #include <linux/in_route.h>
 #include <linux/route.h>
 #include <linux/skbuff.h>
+#include <linux/igmp.h>
 #include <net/net_namespace.h>
 #include <net/dst.h>
 #include <net/sock.h>
@@ -174,7 +175,9 @@ static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
 
 	while (sk) {
 		delivered = 1;
-		if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) {
+		if ((iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) &&
+		    ip_mc_sf_allow(sk, iph->daddr, iph->saddr,
+				   skb->dev->ifindex)) {
 			struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 
 			/* Not releasing hash table! */
@@ -365,6 +368,8 @@ static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
 
 	skb->ip_summed = CHECKSUM_NONE;
 
+	sock_tx_timestamp(sk, &skb_shinfo(skb)->tx_flags);
+
 	skb->transport_header = skb->network_header;
 	err = -EFAULT;
 	if (memcpy_fromiovecend((void *)iph, from, 0, length))
@@ -606,6 +611,8 @@ back_from_confirm:
 				      &rt, msg->msg_flags);
 
 	 else {
+		sock_tx_timestamp(sk, &ipc.tx_flags);
+
 		if (!ipc.addr)
 			ipc.addr = fl4.daddr;
 		lock_sock(sk);
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index c86624b..c0c7568 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -170,7 +170,8 @@ u32 __cookie_v4_init_sequence(const struct iphdr *iph, const struct tcphdr *th,
 }
 EXPORT_SYMBOL_GPL(__cookie_v4_init_sequence);
 
-__u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
+__u32 cookie_v4_init_sequence(struct sock *sk, const struct sk_buff *skb,
+			      __u16 *mssp)
 {
 	const struct iphdr *iph = ip_hdr(skb);
 	const struct tcphdr *th = tcp_hdr(skb);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 9d2118e..744af67 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -426,6 +426,15 @@ void tcp_init_sock(struct sock *sk)
 }
 EXPORT_SYMBOL(tcp_init_sock);
 
+void tcp_tx_timestamp(struct sock *sk, struct sk_buff *skb)
+{
+	struct skb_shared_info *shinfo = skb_shinfo(skb);
+
+	sock_tx_timestamp(sk, &shinfo->tx_flags);
+	if (shinfo->tx_flags & SKBTX_ANY_SW_TSTAMP)
+		shinfo->tskey = TCP_SKB_CB(skb)->seq + skb->len - 1;
+}
+
 /*
  *	Wait for a TCP event.
  *
@@ -523,7 +532,7 @@ unsigned int tcp_poll(struct file *file, struct socket *sock, poll_table *wait)
 	}
 	/* This barrier is coupled with smp_wmb() in tcp_reset() */
 	smp_rmb();
-	if (sk->sk_err)
+	if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
 		mask |= POLLERR;
 
 	return mask;
@@ -959,8 +968,10 @@ new_segment:
 
 		copied += copy;
 		offset += copy;
-		if (!(size -= copy))
+		if (!(size -= copy)) {
+			tcp_tx_timestamp(sk, skb);
 			goto out;
+		}
 
 		if (skb->len < size_goal || (flags & MSG_OOB))
 			continue;
@@ -1252,8 +1263,10 @@ new_segment:
 
 			from += copy;
 			copied += copy;
-			if ((seglen -= copy) == 0 && iovlen == 0)
+			if ((seglen -= copy) == 0 && iovlen == 0) {
+				tcp_tx_timestamp(sk, skb);
 				goto out;
+			}
 
 			if (skb->len < max || (flags & MSG_OOB) || unlikely(tp->repair))
 				continue;
@@ -1617,6 +1630,9 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	struct sk_buff *skb;
 	u32 urg_hole = 0;
 
+	if (unlikely(flags & MSG_ERRQUEUE))
+		return ip_recv_error(sk, msg, len, addr_len);
+
 	if (sk_can_busy_loop(sk) && skb_queue_empty(&sk->sk_receive_queue) &&
 	    (sk->sk_state == TCP_ESTABLISHED))
 		sk_busy_loop(sk, nonblock);
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 40639c2..a3d47af 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -74,6 +74,7 @@
 #include <linux/ipsec.h>
 #include <asm/unaligned.h>
 #include <net/netdma.h>
+#include <linux/errqueue.h>
 
 int sysctl_tcp_timestamps __read_mostly = 1;
 int sysctl_tcp_window_scaling __read_mostly = 1;
@@ -1904,16 +1905,17 @@ void tcp_clear_retrans(struct tcp_sock *tp)
 	tp->sacked_out = 0;
 }
 
-/* Enter Loss state. If "how" is not zero, forget all SACK information
+/* Enter Loss state. If we detect SACK reneging, forget all SACK information
  * and reset tags completely, otherwise preserve SACKs. If receiver
  * dropped its ofo queue, we will know this due to reneging detection.
  */
-void tcp_enter_loss(struct sock *sk, int how)
+void tcp_enter_loss(struct sock *sk)
 {
 	const struct inet_connection_sock *icsk = inet_csk(sk);
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct sk_buff *skb;
 	bool new_recovery = false;
+	bool is_reneg;			/* is receiver reneging on SACKs? */
 
 	/* Reduce ssthresh if it has not yet been made inside this window. */
 	if (icsk->icsk_ca_state <= TCP_CA_Disorder ||
@@ -1934,7 +1936,11 @@ void tcp_enter_loss(struct sock *sk, int how)
 		tcp_reset_reno_sack(tp);
 
 	tp->undo_marker = tp->snd_una;
-	if (how) {
+
+	skb = tcp_write_queue_head(sk);
+	is_reneg = skb && (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED);
+	if (is_reneg) {
+		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPSACKRENEGING);
 		tp->sacked_out = 0;
 		tp->fackets_out = 0;
 	}
@@ -1948,7 +1954,7 @@ void tcp_enter_loss(struct sock *sk, int how)
 			tp->undo_marker = 0;
 
 		TCP_SKB_CB(skb)->sacked &= (~TCPCB_TAGBITS)|TCPCB_SACKED_ACKED;
-		if (!(TCP_SKB_CB(skb)->sacked&TCPCB_SACKED_ACKED) || how) {
+		if (!(TCP_SKB_CB(skb)->sacked&TCPCB_SACKED_ACKED) || is_reneg) {
 			TCP_SKB_CB(skb)->sacked &= ~TCPCB_SACKED_ACKED;
 			TCP_SKB_CB(skb)->sacked |= TCPCB_LOST;
 			tp->lost_out += tcp_skb_pcount(skb);
@@ -1981,19 +1987,21 @@ void tcp_enter_loss(struct sock *sk, int how)
  * remembered SACKs do not reflect real state of receiver i.e.
  * receiver _host_ is heavily congested (or buggy).
  *
- * Do processing similar to RTO timeout.
+ * To avoid big spurious retransmission bursts due to transient SACK
+ * scoreboard oddities that look like reneging, we give the receiver a
+ * little time (max(RTT/2, 10ms)) to send us some more ACKs that will
+ * restore sanity to the SACK scoreboard. If the apparent reneging
+ * persists until this RTO then we'll clear the SACK scoreboard.
  */
 static bool tcp_check_sack_reneging(struct sock *sk, int flag)
 {
 	if (flag & FLAG_SACK_RENEGING) {
-		struct inet_connection_sock *icsk = inet_csk(sk);
-		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPSACKRENEGING);
+		struct tcp_sock *tp = tcp_sk(sk);
+		unsigned long delay = max(usecs_to_jiffies(tp->srtt_us >> 4),
+					  msecs_to_jiffies(10));
 
-		tcp_enter_loss(sk, 1);
-		icsk->icsk_retransmits++;
-		tcp_retransmit_skb(sk, tcp_write_queue_head(sk));
 		inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
-					  icsk->icsk_rto, TCP_RTO_MAX);
+					  delay, TCP_RTO_MAX);
 		return true;
 	}
 	return false;
@@ -2475,7 +2483,7 @@ static bool tcp_try_undo_loss(struct sock *sk, bool frto_undo)
  *	losses and/or application stalls), do not perform any further cwnd
  *	reductions, but instead slow start up to ssthresh.
  */
-static void tcp_init_cwnd_reduction(struct sock *sk, const bool set_ssthresh)
+static void tcp_init_cwnd_reduction(struct sock *sk)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 
@@ -2485,8 +2493,7 @@ static void tcp_init_cwnd_reduction(struct sock *sk, const bool set_ssthresh)
 	tp->prior_cwnd = tp->snd_cwnd;
 	tp->prr_delivered = 0;
 	tp->prr_out = 0;
-	if (set_ssthresh)
-		tp->snd_ssthresh = inet_csk(sk)->icsk_ca_ops->ssthresh(sk);
+	tp->snd_ssthresh = inet_csk(sk)->icsk_ca_ops->ssthresh(sk);
 	TCP_ECN_queue_cwr(tp);
 }
 
@@ -2528,14 +2535,14 @@ static inline void tcp_end_cwnd_reduction(struct sock *sk)
 }
 
 /* Enter CWR state. Disable cwnd undo since congestion is proven with ECN */
-void tcp_enter_cwr(struct sock *sk, const int set_ssthresh)
+void tcp_enter_cwr(struct sock *sk)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 
 	tp->prior_ssthresh = 0;
 	if (inet_csk(sk)->icsk_ca_state < TCP_CA_CWR) {
 		tp->undo_marker = 0;
-		tcp_init_cwnd_reduction(sk, set_ssthresh);
+		tcp_init_cwnd_reduction(sk);
 		tcp_set_ca_state(sk, TCP_CA_CWR);
 	}
 }
@@ -2564,7 +2571,7 @@ static void tcp_try_to_open(struct sock *sk, int flag, const int prior_unsacked)
 		tp->retrans_stamp = 0;
 
 	if (flag & FLAG_ECE)
-		tcp_enter_cwr(sk, 1);
+		tcp_enter_cwr(sk);
 
 	if (inet_csk(sk)->icsk_ca_state != TCP_CA_CWR) {
 		tcp_try_keep_open(sk);
@@ -2670,7 +2677,7 @@ static void tcp_enter_recovery(struct sock *sk, bool ece_ack)
 	if (inet_csk(sk)->icsk_ca_state < TCP_CA_CWR) {
 		if (!ece_ack)
 			tp->prior_ssthresh = tcp_current_ssthresh(sk);
-		tcp_init_cwnd_reduction(sk, true);
+		tcp_init_cwnd_reduction(sk);
 	}
 	tcp_set_ca_state(sk, TCP_CA_Recovery);
 }
@@ -3100,6 +3107,11 @@ static int tcp_clean_rtx_queue(struct sock *sk, int prior_fackets,
 			tp->retrans_stamp = 0;
 		}
 
+		if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_ACK_TSTAMP) &&
+		    between(skb_shinfo(skb)->tskey, prior_snd_una,
+			    tp->snd_una + 1))
+			__skb_tstamp_tx(skb, NULL, sk, SCM_TSTAMP_ACK);
+
 		if (!fully_acked)
 			break;
 
@@ -3346,7 +3358,7 @@ static void tcp_process_tlp_ack(struct sock *sk, u32 ack, int flag)
 		tp->tlp_high_seq = 0;
 		/* Don't reduce cwnd if DSACK arrives for TLP retrans. */
 		if (!(flag & FLAG_DSACKING_ACK)) {
-			tcp_init_cwnd_reduction(sk, true);
+			tcp_init_cwnd_reduction(sk);
 			tcp_set_ca_state(sk, TCP_CA_CWR);
 			tcp_end_cwnd_reduction(sk);
 			tcp_try_keep_open(sk);
@@ -5877,3 +5889,153 @@ discard:
 	return 0;
 }
 EXPORT_SYMBOL(tcp_rcv_state_process);
+
+static inline void pr_drop_req(struct request_sock *req, __u16 port, int family)
+{
+	struct inet_request_sock *ireq = inet_rsk(req);
+
+	if (family == AF_INET)
+		LIMIT_NETDEBUG(KERN_DEBUG pr_fmt("drop open request from %pI4/%u\n"),
+			       &ireq->ir_rmt_addr, port);
+#if IS_ENABLED(CONFIG_IPV6)
+	else if (family == AF_INET6)
+		LIMIT_NETDEBUG(KERN_DEBUG pr_fmt("drop open request from %pI6/%u\n"),
+			       &ireq->ir_v6_rmt_addr, port);
+#endif
+}
+
+int tcp_conn_request(struct request_sock_ops *rsk_ops,
+		     const struct tcp_request_sock_ops *af_ops,
+		     struct sock *sk, struct sk_buff *skb)
+{
+	struct tcp_options_received tmp_opt;
+	struct request_sock *req;
+	struct tcp_sock *tp = tcp_sk(sk);
+	struct dst_entry *dst = NULL;
+	__u32 isn = TCP_SKB_CB(skb)->when;
+	bool want_cookie = false, fastopen;
+	struct flowi fl;
+	struct tcp_fastopen_cookie foc = { .len = -1 };
+	int err;
+
+
+	/* TW buckets are converted to open requests without
+	 * limitations, they conserve resources and peer is
+	 * evidently real one.
+	 */
+	if ((sysctl_tcp_syncookies == 2 ||
+	     inet_csk_reqsk_queue_is_full(sk)) && !isn) {
+		want_cookie = tcp_syn_flood_action(sk, skb, rsk_ops->slab_name);
+		if (!want_cookie)
+			goto drop;
+	}
+
+
+	/* Accept backlog is full. If we have already queued enough
+	 * of warm entries in syn queue, drop request. It is better than
+	 * clogging syn queue with openreqs with exponentially increasing
+	 * timeout.
+	 */
+	if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) {
+		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
+		goto drop;
+	}
+
+	req = inet_reqsk_alloc(rsk_ops);
+	if (!req)
+		goto drop;
+
+	tcp_rsk(req)->af_specific = af_ops;
+
+	tcp_clear_options(&tmp_opt);
+	tmp_opt.mss_clamp = af_ops->mss_clamp;
+	tmp_opt.user_mss  = tp->rx_opt.user_mss;
+	tcp_parse_options(skb, &tmp_opt, 0, want_cookie ? NULL : &foc);
+
+	if (want_cookie && !tmp_opt.saw_tstamp)
+		tcp_clear_options(&tmp_opt);
+
+	tmp_opt.tstamp_ok = tmp_opt.saw_tstamp;
+	tcp_openreq_init(req, &tmp_opt, skb, sk);
+
+	af_ops->init_req(req, sk, skb);
+
+	if (security_inet_conn_request(sk, skb, req))
+		goto drop_and_free;
+
+	if (!want_cookie || tmp_opt.tstamp_ok)
+		TCP_ECN_create_request(req, skb, sock_net(sk));
+
+	if (want_cookie) {
+		isn = cookie_init_sequence(af_ops, sk, skb, &req->mss);
+		req->cookie_ts = tmp_opt.tstamp_ok;
+	} else if (!isn) {
+		/* VJ's idea. We save last timestamp seen
+		 * from the destination in peer table, when entering
+		 * state TIME-WAIT, and check against it before
+		 * accepting new connection request.
+		 *
+		 * If "isn" is not zero, this request hit alive
+		 * timewait bucket, so that all the necessary checks
+		 * are made in the function processing timewait state.
+		 */
+		if (tmp_opt.saw_tstamp && tcp_death_row.sysctl_tw_recycle) {
+			bool strict;
+
+			dst = af_ops->route_req(sk, &fl, req, &strict);
+			if (dst && strict &&
+			    !tcp_peer_is_proven(req, dst, true)) {
+				NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_PAWSPASSIVEREJECTED);
+				goto drop_and_release;
+			}
+		}
+		/* Kill the following clause, if you dislike this way. */
+		else if (!sysctl_tcp_syncookies &&
+			 (sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) <
+			  (sysctl_max_syn_backlog >> 2)) &&
+			 !tcp_peer_is_proven(req, dst, false)) {
+			/* Without syncookies last quarter of
+			 * backlog is filled with destinations,
+			 * proven to be alive.
+			 * It means that we continue to communicate
+			 * to destinations, already remembered
+			 * to the moment of synflood.
+			 */
+			pr_drop_req(req, ntohs(tcp_hdr(skb)->source),
+				    rsk_ops->family);
+			goto drop_and_release;
+		}
+
+		isn = af_ops->init_seq(skb);
+	}
+	if (!dst) {
+		dst = af_ops->route_req(sk, &fl, req, NULL);
+		if (!dst)
+			goto drop_and_free;
+	}
+
+	tcp_rsk(req)->snt_isn = isn;
+	tcp_openreq_init_rwin(req, sk, dst);
+	fastopen = !want_cookie &&
+		   tcp_try_fastopen(sk, skb, req, &foc, dst);
+	err = af_ops->send_synack(sk, dst, &fl, req,
+				  skb_get_queue_mapping(skb), &foc);
+	if (!fastopen) {
+		if (err || want_cookie)
+			goto drop_and_free;
+
+		tcp_rsk(req)->listener = NULL;
+		af_ops->queue_hash_add(sk, req, TCP_TIMEOUT_INIT);
+	}
+
+	return 0;
+
+drop_and_release:
+	dst_release(dst);
+drop_and_free:
+	reqsk_free(req);
+drop:
+	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
+	return 0;
+}
+EXPORT_SYMBOL(tcp_conn_request);
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 77cccda..992a1f9 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -99,7 +99,7 @@ static int tcp_v4_md5_hash_hdr(char *md5_hash, const struct tcp_md5sig_key *key,
 struct inet_hashinfo tcp_hashinfo;
 EXPORT_SYMBOL(tcp_hashinfo);
 
-static inline __u32 tcp_v4_init_sequence(const struct sk_buff *skb)
+static  __u32 tcp_v4_init_sequence(const struct sk_buff *skb)
 {
 	return secure_tcp_sequence_number(ip_hdr(skb)->daddr,
 					  ip_hdr(skb)->saddr,
@@ -208,6 +208,8 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	inet->inet_dport = usin->sin_port;
 	inet->inet_daddr = daddr;
 
+	inet_set_txhash(sk);
+
 	inet_csk(sk)->icsk_ext_hdr_len = 0;
 	if (inet_opt)
 		inet_csk(sk)->icsk_ext_hdr_len = inet_opt->opt.optlen;
@@ -342,11 +344,6 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
 	int err;
 	struct net *net = dev_net(icmp_skb->dev);
 
-	if (icmp_skb->len < (iph->ihl << 2) + 8) {
-		ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
-		return;
-	}
-
 	sk = inet_lookup(net, &tcp_hashinfo, iph->daddr, th->dest,
 			iph->saddr, th->source, inet_iif(icmp_skb));
 	if (!sk) {
@@ -814,6 +811,7 @@ static void tcp_v4_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
  *	socket.
  */
 static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst,
+			      struct flowi *fl,
 			      struct request_sock *req,
 			      u16 queue_mapping,
 			      struct tcp_fastopen_cookie *foc)
@@ -837,24 +835,11 @@ static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst,
 					    ireq->ir_rmt_addr,
 					    ireq->opt);
 		err = net_xmit_eval(err);
-		if (!tcp_rsk(req)->snt_synack && !err)
-			tcp_rsk(req)->snt_synack = tcp_time_stamp;
 	}
 
 	return err;
 }
 
-static int tcp_v4_rtx_synack(struct sock *sk, struct request_sock *req)
-{
-	int res = tcp_v4_send_synack(sk, NULL, req, 0, NULL);
-
-	if (!res) {
-		TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
-		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPSYNRETRANS);
-	}
-	return res;
-}
-
 /*
  *	IPv4 request_sock destructor.
  */
@@ -1064,7 +1049,7 @@ static int tcp_v4_parse_md5_keys(struct sock *sk, char __user *optval,
 	if (sin->sin_family != AF_INET)
 		return -EINVAL;
 
-	if (!cmd.tcpm_key || !cmd.tcpm_keylen)
+	if (!cmd.tcpm_keylen)
 		return tcp_md5_do_del(sk, (union tcp_md5_addr *)&sin->sin_addr.s_addr,
 				      AF_INET);
 
@@ -1237,161 +1222,68 @@ static bool tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
 
 #endif
 
+static void tcp_v4_init_req(struct request_sock *req, struct sock *sk,
+			    struct sk_buff *skb)
+{
+	struct inet_request_sock *ireq = inet_rsk(req);
+
+	ireq->ir_loc_addr = ip_hdr(skb)->daddr;
+	ireq->ir_rmt_addr = ip_hdr(skb)->saddr;
+	ireq->no_srccheck = inet_sk(sk)->transparent;
+	ireq->opt = tcp_v4_save_options(skb);
+}
+
+static struct dst_entry *tcp_v4_route_req(struct sock *sk, struct flowi *fl,
+					  const struct request_sock *req,
+					  bool *strict)
+{
+	struct dst_entry *dst = inet_csk_route_req(sk, &fl->u.ip4, req);
+
+	if (strict) {
+		if (fl->u.ip4.daddr == inet_rsk(req)->ir_rmt_addr)
+			*strict = true;
+		else
+			*strict = false;
+	}
+
+	return dst;
+}
+
 struct request_sock_ops tcp_request_sock_ops __read_mostly = {
 	.family		=	PF_INET,
 	.obj_size	=	sizeof(struct tcp_request_sock),
-	.rtx_syn_ack	=	tcp_v4_rtx_synack,
+	.rtx_syn_ack	=	tcp_rtx_synack,
 	.send_ack	=	tcp_v4_reqsk_send_ack,
 	.destructor	=	tcp_v4_reqsk_destructor,
 	.send_reset	=	tcp_v4_send_reset,
 	.syn_ack_timeout = 	tcp_syn_ack_timeout,
 };
 
-#ifdef CONFIG_TCP_MD5SIG
 static const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops = {
+	.mss_clamp	=	TCP_MSS_DEFAULT,
+#ifdef CONFIG_TCP_MD5SIG
 	.md5_lookup	=	tcp_v4_reqsk_md5_lookup,
 	.calc_md5_hash	=	tcp_v4_md5_hash_skb,
-};
 #endif
+	.init_req	=	tcp_v4_init_req,
+#ifdef CONFIG_SYN_COOKIES
+	.cookie_init_seq =	cookie_v4_init_sequence,
+#endif
+	.route_req	=	tcp_v4_route_req,
+	.init_seq	=	tcp_v4_init_sequence,
+	.send_synack	=	tcp_v4_send_synack,
+	.queue_hash_add =	inet_csk_reqsk_queue_hash_add,
+};
 
 int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 {
-	struct tcp_options_received tmp_opt;
-	struct request_sock *req;
-	struct inet_request_sock *ireq;
-	struct tcp_sock *tp = tcp_sk(sk);
-	struct dst_entry *dst = NULL;
-	__be32 saddr = ip_hdr(skb)->saddr;
-	__be32 daddr = ip_hdr(skb)->daddr;
-	__u32 isn = TCP_SKB_CB(skb)->when;
-	bool want_cookie = false, fastopen;
-	struct flowi4 fl4;
-	struct tcp_fastopen_cookie foc = { .len = -1 };
-	int err;
-
 	/* Never answer to SYNs send to broadcast or multicast */
 	if (skb_rtable(skb)->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))
 		goto drop;
 
-	/* TW buckets are converted to open requests without
-	 * limitations, they conserve resources and peer is
-	 * evidently real one.
-	 */
-	if ((sysctl_tcp_syncookies == 2 ||
-	     inet_csk_reqsk_queue_is_full(sk)) && !isn) {
-		want_cookie = tcp_syn_flood_action(sk, skb, "TCP");
-		if (!want_cookie)
-			goto drop;
-	}
-
-	/* Accept backlog is full. If we have already queued enough
-	 * of warm entries in syn queue, drop request. It is better than
-	 * clogging syn queue with openreqs with exponentially increasing
-	 * timeout.
-	 */
-	if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) {
-		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
-		goto drop;
-	}
-
-	req = inet_reqsk_alloc(&tcp_request_sock_ops);
-	if (!req)
-		goto drop;
-
-#ifdef CONFIG_TCP_MD5SIG
-	tcp_rsk(req)->af_specific = &tcp_request_sock_ipv4_ops;
-#endif
-
-	tcp_clear_options(&tmp_opt);
-	tmp_opt.mss_clamp = TCP_MSS_DEFAULT;
-	tmp_opt.user_mss  = tp->rx_opt.user_mss;
-	tcp_parse_options(skb, &tmp_opt, 0, want_cookie ? NULL : &foc);
-
-	if (want_cookie && !tmp_opt.saw_tstamp)
-		tcp_clear_options(&tmp_opt);
-
-	tmp_opt.tstamp_ok = tmp_opt.saw_tstamp;
-	tcp_openreq_init(req, &tmp_opt, skb);
-
-	ireq = inet_rsk(req);
-	ireq->ir_loc_addr = daddr;
-	ireq->ir_rmt_addr = saddr;
-	ireq->no_srccheck = inet_sk(sk)->transparent;
-	ireq->opt = tcp_v4_save_options(skb);
-	ireq->ir_mark = inet_request_mark(sk, skb);
-
-	if (security_inet_conn_request(sk, skb, req))
-		goto drop_and_free;
-
-	if (!want_cookie || tmp_opt.tstamp_ok)
-		TCP_ECN_create_request(req, skb, sock_net(sk));
-
-	if (want_cookie) {
-		isn = cookie_v4_init_sequence(sk, skb, &req->mss);
-		req->cookie_ts = tmp_opt.tstamp_ok;
-	} else if (!isn) {
-		/* VJ's idea. We save last timestamp seen
-		 * from the destination in peer table, when entering
-		 * state TIME-WAIT, and check against it before
-		 * accepting new connection request.
-		 *
-		 * If "isn" is not zero, this request hit alive
-		 * timewait bucket, so that all the necessary checks
-		 * are made in the function processing timewait state.
-		 */
-		if (tmp_opt.saw_tstamp &&
-		    tcp_death_row.sysctl_tw_recycle &&
-		    (dst = inet_csk_route_req(sk, &fl4, req)) != NULL &&
-		    fl4.daddr == saddr) {
-			if (!tcp_peer_is_proven(req, dst, true)) {
-				NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_PAWSPASSIVEREJECTED);
-				goto drop_and_release;
-			}
-		}
-		/* Kill the following clause, if you dislike this way. */
-		else if (!sysctl_tcp_syncookies &&
-			 (sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) <
-			  (sysctl_max_syn_backlog >> 2)) &&
-			 !tcp_peer_is_proven(req, dst, false)) {
-			/* Without syncookies last quarter of
-			 * backlog is filled with destinations,
-			 * proven to be alive.
-			 * It means that we continue to communicate
-			 * to destinations, already remembered
-			 * to the moment of synflood.
-			 */
-			LIMIT_NETDEBUG(KERN_DEBUG pr_fmt("drop open request from %pI4/%u\n"),
-				       &saddr, ntohs(tcp_hdr(skb)->source));
-			goto drop_and_release;
-		}
-
-		isn = tcp_v4_init_sequence(skb);
-	}
-	if (!dst && (dst = inet_csk_route_req(sk, &fl4, req)) == NULL)
-		goto drop_and_free;
-
-	tcp_rsk(req)->snt_isn = isn;
-	tcp_rsk(req)->snt_synack = tcp_time_stamp;
-	tcp_openreq_init_rwin(req, sk, dst);
-	fastopen = !want_cookie &&
-		   tcp_try_fastopen(sk, skb, req, &foc, dst);
-	err = tcp_v4_send_synack(sk, dst, req,
-				 skb_get_queue_mapping(skb), &foc);
-	if (!fastopen) {
-		if (err || want_cookie)
-			goto drop_and_free;
-
-		tcp_rsk(req)->snt_synack = tcp_time_stamp;
-		tcp_rsk(req)->listener = NULL;
-		inet_csk_reqsk_queue_hash_add(sk, req, TCP_TIMEOUT_INIT);
-	}
-
-	return 0;
+	return tcp_conn_request(&tcp_request_sock_ops,
+				&tcp_request_sock_ipv4_ops, sk, skb);
 
-drop_and_release:
-	dst_release(dst);
-drop_and_free:
-	reqsk_free(req);
 drop:
 	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
 	return 0;
@@ -1439,6 +1331,7 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 	newinet->mc_ttl	      = ip_hdr(skb)->ttl;
 	newinet->rcv_tos      = ip_hdr(skb)->tos;
 	inet_csk(newsk)->icsk_ext_hdr_len = 0;
+	inet_set_txhash(newsk);
 	if (inet_opt)
 		inet_csk(newsk)->icsk_ext_hdr_len = inet_opt->opt.optlen;
 	newinet->inet_id = newtp->write_seq ^ jiffies;
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 4fe0418..0d54e59 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -1093,7 +1093,6 @@ static const struct genl_ops tcp_metrics_nl_ops[] = {
 		.doit = tcp_metrics_nl_cmd_get,
 		.dumpit = tcp_metrics_nl_dump,
 		.policy = tcp_metrics_nl_policy,
-		.flags = GENL_ADMIN_PERM,
 	},
 	{
 		.cmd = TCP_METRICS_CMD_DEL,
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index e68e0d4..1649988 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -298,7 +298,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
 			tw->tw_v6_rcv_saddr = sk->sk_v6_rcv_saddr;
 			tw->tw_tclass = np->tclass;
 			tw->tw_flowlabel = np->flow_label >> 12;
-			tw->tw_ipv6only = np->ipv6only;
+			tw->tw_ipv6only = sk->sk_ipv6only;
 		}
 #endif
 
diff --git a/net/ipv4/tcp_offload.c b/net/ipv4/tcp_offload.c
index 55046ec..f597119 100644
--- a/net/ipv4/tcp_offload.c
+++ b/net/ipv4/tcp_offload.c
@@ -14,6 +14,21 @@
 #include <net/tcp.h>
 #include <net/protocol.h>
 
+void tcp_gso_tstamp(struct sk_buff *skb, unsigned int ts_seq, unsigned int seq,
+		    unsigned int mss)
+{
+	while (skb) {
+		if (ts_seq < (__u64) seq + mss) {
+			skb_shinfo(skb)->tx_flags = SKBTX_SW_TSTAMP;
+			skb_shinfo(skb)->tskey = ts_seq;
+			return;
+		}
+
+		skb = skb->next;
+		seq += mss;
+	}
+}
+
 struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
 				netdev_features_t features)
 {
@@ -91,6 +106,9 @@ struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
 	th = tcp_hdr(skb);
 	seq = ntohl(th->seq);
 
+	if (unlikely(skb_shinfo(gso_skb)->tx_flags & SKBTX_SW_TSTAMP))
+		tcp_gso_tstamp(segs, skb_shinfo(gso_skb)->tskey, seq, mss);
+
 	newcheck = ~csum_fold((__force __wsum)((__force u32)th->check +
 					       (__force u32)delta));
 
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 179b51e..8fcfc91 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -916,6 +916,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
 	skb_orphan(skb);
 	skb->sk = sk;
 	skb->destructor = tcp_wfree;
+	skb_set_hash_from_sk(skb, sk);
 	atomic_add(skb->truesize, &sk->sk_wmem_alloc);
 
 	/* Build TCP header and checksum it. */
@@ -978,7 +979,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
 	if (likely(err <= 0))
 		return err;
 
-	tcp_enter_cwr(sk, 1);
+	tcp_enter_cwr(sk);
 
 	return net_xmit_eval(err);
 }
@@ -3301,3 +3302,18 @@ void tcp_send_probe0(struct sock *sk)
 					  TCP_RTO_MAX);
 	}
 }
+
+int tcp_rtx_synack(struct sock *sk, struct request_sock *req)
+{
+	const struct tcp_request_sock_ops *af_ops = tcp_rsk(req)->af_specific;
+	struct flowi fl;
+	int res;
+
+	res = af_ops->send_synack(sk, NULL, &fl, req, 0, NULL);
+	if (!res) {
+		TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
+		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPSYNRETRANS);
+	}
+	return res;
+}
+EXPORT_SYMBOL(tcp_rtx_synack);
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 286227a..df90cd1 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -391,7 +391,7 @@ void tcp_retransmit_timer(struct sock *sk)
 			tcp_write_err(sk);
 			goto out;
 		}
-		tcp_enter_loss(sk, 0);
+		tcp_enter_loss(sk);
 		tcp_retransmit_skb(sk, tcp_write_queue_head(sk));
 		__sk_dst_reset(sk);
 		goto out_reset_timer;
@@ -422,7 +422,7 @@ void tcp_retransmit_timer(struct sock *sk)
 		NET_INC_STATS_BH(sock_net(sk), mib_idx);
 	}
 
-	tcp_enter_loss(sk, 0);
+	tcp_enter_loss(sk);
 
 	if (tcp_retransmit_skb(sk, tcp_write_queue_head(sk)) > 0) {
 		/* Retransmission failed because of local congestion,
diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c
index 9a5e05f..b40ad89 100644
--- a/net/ipv4/tcp_vegas.c
+++ b/net/ipv4/tcp_vegas.c
@@ -218,7 +218,8 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, u32 acked)
 			 * This is:
 			 *     (actual rate in segments) * baseRTT
 			 */
-			target_cwnd = tp->snd_cwnd * vegas->baseRTT / rtt;
+			target_cwnd = (u64)tp->snd_cwnd * vegas->baseRTT;
+			do_div(target_cwnd, rtt);
 
 			/* Calculate the difference between the window we had,
 			 * and the window we would like to have. This quantity
diff --git a/net/ipv4/tcp_veno.c b/net/ipv4/tcp_veno.c
index 27b9825..8276977 100644
--- a/net/ipv4/tcp_veno.c
+++ b/net/ipv4/tcp_veno.c
@@ -144,7 +144,7 @@ static void tcp_veno_cong_avoid(struct sock *sk, u32 ack, u32 acked)
 
 		rtt = veno->minrtt;
 
-		target_cwnd = (tp->snd_cwnd * veno->basertt);
+		target_cwnd = (u64)tp->snd_cwnd * veno->basertt;
 		target_cwnd <<= V_PARAM_SHIFT;
 		do_div(target_cwnd, rtt);
 
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 7d5a866..f57c0e4 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -594,27 +594,6 @@ static inline bool __udp_is_mcast_sock(struct net *net, struct sock *sk,
 	return true;
 }
 
-static inline struct sock *udp_v4_mcast_next(struct net *net, struct sock *sk,
-					     __be16 loc_port, __be32 loc_addr,
-					     __be16 rmt_port, __be32 rmt_addr,
-					     int dif)
-{
-	struct hlist_nulls_node *node;
-	struct sock *s = sk;
-	unsigned short hnum = ntohs(loc_port);
-
-	sk_nulls_for_each_from(s, node) {
-		if (__udp_is_mcast_sock(net, s,
-					loc_port, loc_addr,
-					rmt_port, rmt_addr,
-					dif, hnum))
-			goto found;
-	}
-	s = NULL;
-found:
-	return s;
-}
-
 /*
  * This routine is called by the ICMP module when it gets some
  * sort of error condition.  If err < 0 then the socket should
@@ -1588,7 +1567,7 @@ int udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
 		goto csum_error;
 
 
-	if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) {
+	if (sk_rcvqueues_full(sk, sk->sk_rcvbuf)) {
 		UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS,
 				 is_udplite);
 		goto drop;
@@ -1640,6 +1619,8 @@ static void flush_stack(struct sock **stack, unsigned int count,
 
 		if (skb1 && udp_queue_rcv_skb(sk, skb1) <= 0)
 			skb1 = NULL;
+
+		sock_put(sk);
 	}
 	if (unlikely(skb1))
 		kfree_skb(skb1);
@@ -1668,41 +1649,50 @@ static int __udp4_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
 				    struct udp_table *udptable)
 {
 	struct sock *sk, *stack[256 / sizeof(struct sock *)];
-	struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest));
-	int dif;
-	unsigned int i, count = 0;
+	struct hlist_nulls_node *node;
+	unsigned short hnum = ntohs(uh->dest);
+	struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum);
+	int dif = skb->dev->ifindex;
+	unsigned int count = 0, offset = offsetof(typeof(*sk), sk_nulls_node);
+	unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10);
+
+	if (use_hash2) {
+		hash2_any = udp4_portaddr_hash(net, htonl(INADDR_ANY), hnum) &
+			    udp_table.mask;
+		hash2 = udp4_portaddr_hash(net, daddr, hnum) & udp_table.mask;
+start_lookup:
+		hslot = &udp_table.hash2[hash2];
+		offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node);
+	}
 
 	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);
-	while (sk) {
-		stack[count++] = sk;
-		sk = udp_v4_mcast_next(net, sk_nulls_next(sk), uh->dest,
-				       daddr, uh->source, saddr, dif);
-		if (unlikely(count == ARRAY_SIZE(stack))) {
-			if (!sk)
-				break;
-			flush_stack(stack, count, skb, ~0);
-			count = 0;
+	sk_nulls_for_each_entry_offset(sk, node, &hslot->head, offset) {
+		if (__udp_is_mcast_sock(net, sk,
+					uh->dest, daddr,
+					uh->source, saddr,
+					dif, hnum)) {
+			if (unlikely(count == ARRAY_SIZE(stack))) {
+				flush_stack(stack, count, skb, ~0);
+				count = 0;
+			}
+			stack[count++] = sk;
+			sock_hold(sk);
 		}
 	}
-	/*
-	 * before releasing chain lock, we must take a reference on sockets
-	 */
-	for (i = 0; i < count; i++)
-		sock_hold(stack[i]);
 
 	spin_unlock(&hslot->lock);
 
+	/* Also lookup *:port if we are using hash2 and haven't done so yet. */
+	if (use_hash2 && hash2 != hash2_any) {
+		hash2 = hash2_any;
+		goto start_lookup;
+	}
+
 	/*
 	 * do the slow work with no lock held
 	 */
 	if (count) {
 		flush_stack(stack, count, skb, count - 1);
-
-		for (i = 0; i < count; i++)
-			sock_put(stack[i]);
 	} else {
 		kfree_skb(skb);
 	}
@@ -2526,79 +2516,3 @@ void __init udp_init(void)
 	sysctl_udp_rmem_min = SK_MEM_QUANTUM;
 	sysctl_udp_wmem_min = SK_MEM_QUANTUM;
 }
-
-struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
-				       netdev_features_t features)
-{
-	struct sk_buff *segs = ERR_PTR(-EINVAL);
-	u16 mac_offset = skb->mac_header;
-	int mac_len = skb->mac_len;
-	int tnl_hlen = skb_inner_mac_header(skb) - skb_transport_header(skb);
-	__be16 protocol = skb->protocol;
-	netdev_features_t enc_features;
-	int udp_offset, outer_hlen;
-	unsigned int oldlen;
-	bool need_csum;
-
-	oldlen = (u16)~skb->len;
-
-	if (unlikely(!pskb_may_pull(skb, tnl_hlen)))
-		goto out;
-
-	skb->encapsulation = 0;
-	__skb_pull(skb, tnl_hlen);
-	skb_reset_mac_header(skb);
-	skb_set_network_header(skb, skb_inner_network_offset(skb));
-	skb->mac_len = skb_inner_network_offset(skb);
-	skb->protocol = htons(ETH_P_TEB);
-
-	need_csum = !!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM);
-	if (need_csum)
-		skb->encap_hdr_csum = 1;
-
-	/* segment inner packet. */
-	enc_features = skb->dev->hw_enc_features & netif_skb_features(skb);
-	segs = skb_mac_gso_segment(skb, enc_features);
-	if (!segs || IS_ERR(segs)) {
-		skb_gso_error_unwind(skb, protocol, tnl_hlen, mac_offset,
-				     mac_len);
-		goto out;
-	}
-
-	outer_hlen = skb_tnl_header_len(skb);
-	udp_offset = outer_hlen - tnl_hlen;
-	skb = segs;
-	do {
-		struct udphdr *uh;
-		int len;
-
-		skb_reset_inner_headers(skb);
-		skb->encapsulation = 1;
-
-		skb->mac_len = mac_len;
-
-		skb_push(skb, outer_hlen);
-		skb_reset_mac_header(skb);
-		skb_set_network_header(skb, mac_len);
-		skb_set_transport_header(skb, udp_offset);
-		len = skb->len - udp_offset;
-		uh = udp_hdr(skb);
-		uh->len = htons(len);
-
-		if (need_csum) {
-			__be32 delta = htonl(oldlen + len);
-
-			uh->check = ~csum_fold((__force __wsum)
-					       ((__force u32)uh->check +
-						(__force u32)delta));
-			uh->check = gso_make_checksum(skb, ~uh->check);
-
-			if (uh->check == 0)
-				uh->check = CSUM_MANGLED_0;
-		}
-
-		skb->protocol = protocol;
-	} while ((skb = skb->next));
-out:
-	return segs;
-}
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c
index 546d2d4..59035bc 100644
--- a/net/ipv4/udp_offload.c
+++ b/net/ipv4/udp_offload.c
@@ -47,6 +47,82 @@ static int udp4_ufo_send_check(struct sk_buff *skb)
 	return 0;
 }
 
+struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
+				       netdev_features_t features)
+{
+	struct sk_buff *segs = ERR_PTR(-EINVAL);
+	u16 mac_offset = skb->mac_header;
+	int mac_len = skb->mac_len;
+	int tnl_hlen = skb_inner_mac_header(skb) - skb_transport_header(skb);
+	__be16 protocol = skb->protocol;
+	netdev_features_t enc_features;
+	int udp_offset, outer_hlen;
+	unsigned int oldlen;
+	bool need_csum;
+
+	oldlen = (u16)~skb->len;
+
+	if (unlikely(!pskb_may_pull(skb, tnl_hlen)))
+		goto out;
+
+	skb->encapsulation = 0;
+	__skb_pull(skb, tnl_hlen);
+	skb_reset_mac_header(skb);
+	skb_set_network_header(skb, skb_inner_network_offset(skb));
+	skb->mac_len = skb_inner_network_offset(skb);
+	skb->protocol = htons(ETH_P_TEB);
+
+	need_csum = !!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM);
+	if (need_csum)
+		skb->encap_hdr_csum = 1;
+
+	/* segment inner packet. */
+	enc_features = skb->dev->hw_enc_features & netif_skb_features(skb);
+	segs = skb_mac_gso_segment(skb, enc_features);
+	if (IS_ERR_OR_NULL(segs)) {
+		skb_gso_error_unwind(skb, protocol, tnl_hlen, mac_offset,
+				     mac_len);
+		goto out;
+	}
+
+	outer_hlen = skb_tnl_header_len(skb);
+	udp_offset = outer_hlen - tnl_hlen;
+	skb = segs;
+	do {
+		struct udphdr *uh;
+		int len;
+
+		skb_reset_inner_headers(skb);
+		skb->encapsulation = 1;
+
+		skb->mac_len = mac_len;
+
+		skb_push(skb, outer_hlen);
+		skb_reset_mac_header(skb);
+		skb_set_network_header(skb, mac_len);
+		skb_set_transport_header(skb, udp_offset);
+		len = skb->len - udp_offset;
+		uh = udp_hdr(skb);
+		uh->len = htons(len);
+
+		if (need_csum) {
+			__be32 delta = htonl(oldlen + len);
+
+			uh->check = ~csum_fold((__force __wsum)
+					       ((__force u32)uh->check +
+						(__force u32)delta));
+			uh->check = gso_make_checksum(skb, ~uh->check);
+
+			if (uh->check == 0)
+				uh->check = CSUM_MANGLED_0;
+		}
+
+		skb->protocol = protocol;
+	} while ((skb = skb->next));
+out:
+	return segs;
+}
+
 static struct sk_buff *udp4_ufo_fragment(struct sk_buff *skb,
 					 netdev_features_t features)
 {
diff --git a/net/ipv4/udp_tunnel.c b/net/ipv4/udp_tunnel.c
new file mode 100644
index 0000000..61ec1a6
--- /dev/null
+++ b/net/ipv4/udp_tunnel.c
@@ -0,0 +1,100 @@
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/socket.h>
+#include <linux/udp.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <net/udp.h>
+#include <net/udp_tunnel.h>
+#include <net/net_namespace.h>
+
+int udp_sock_create(struct net *net, struct udp_port_cfg *cfg,
+		    struct socket **sockp)
+{
+	int err = -EINVAL;
+	struct socket *sock = NULL;
+
+#if IS_ENABLED(CONFIG_IPV6)
+	if (cfg->family == AF_INET6) {
+		struct sockaddr_in6 udp6_addr;
+
+		err = sock_create_kern(AF_INET6, SOCK_DGRAM, 0, &sock);
+		if (err < 0)
+			goto error;
+
+		sk_change_net(sock->sk, net);
+
+		udp6_addr.sin6_family = AF_INET6;
+		memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
+		       sizeof(udp6_addr.sin6_addr));
+		udp6_addr.sin6_port = cfg->local_udp_port;
+		err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
+				  sizeof(udp6_addr));
+		if (err < 0)
+			goto error;
+
+		if (cfg->peer_udp_port) {
+			udp6_addr.sin6_family = AF_INET6;
+			memcpy(&udp6_addr.sin6_addr, &cfg->peer_ip6,
+			       sizeof(udp6_addr.sin6_addr));
+			udp6_addr.sin6_port = cfg->peer_udp_port;
+			err = kernel_connect(sock,
+					     (struct sockaddr *)&udp6_addr,
+					     sizeof(udp6_addr), 0);
+		}
+		if (err < 0)
+			goto error;
+
+		udp_set_no_check6_tx(sock->sk, !cfg->use_udp6_tx_checksums);
+		udp_set_no_check6_rx(sock->sk, !cfg->use_udp6_rx_checksums);
+	} else
+#endif
+	if (cfg->family == AF_INET) {
+		struct sockaddr_in udp_addr;
+
+		err = sock_create_kern(AF_INET, SOCK_DGRAM, 0, &sock);
+		if (err < 0)
+			goto error;
+
+		sk_change_net(sock->sk, net);
+
+		udp_addr.sin_family = AF_INET;
+		udp_addr.sin_addr = cfg->local_ip;
+		udp_addr.sin_port = cfg->local_udp_port;
+		err = kernel_bind(sock, (struct sockaddr *)&udp_addr,
+				  sizeof(udp_addr));
+		if (err < 0)
+			goto error;
+
+		if (cfg->peer_udp_port) {
+			udp_addr.sin_family = AF_INET;
+			udp_addr.sin_addr = cfg->peer_ip;
+			udp_addr.sin_port = cfg->peer_udp_port;
+			err = kernel_connect(sock,
+					     (struct sockaddr *)&udp_addr,
+					     sizeof(udp_addr), 0);
+			if (err < 0)
+				goto error;
+		}
+
+		sock->sk->sk_no_check_tx = !cfg->use_udp_checksums;
+	} else {
+		return -EPFNOSUPPORT;
+	}
+
+
+	*sockp = sock;
+
+	return 0;
+
+error:
+	if (sock) {
+		kernel_sock_shutdown(sock, SHUT_RDWR);
+		sk_release_kernel(sock->sk);
+	}
+	*sockp = NULL;
+	return err;
+}
+EXPORT_SYMBOL(udp_sock_create);
+
+MODULE_LICENSE("GPL");
diff --git a/net/ipv4/xfrm4_protocol.c b/net/ipv4/xfrm4_protocol.c
index a2ce010..dccefa9 100644
--- a/net/ipv4/xfrm4_protocol.c
+++ b/net/ipv4/xfrm4_protocol.c
@@ -124,7 +124,7 @@ static int xfrm4_ah_rcv(struct sk_buff *skb)
 
 	for_each_protocol_rcu(ah4_handlers, handler)
 		if ((ret = handler->handler(skb)) != -EINVAL)
-			return ret;;
+			return ret;
 
 	icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);