19 files changed, 394 insertions, 206 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 17e912f..1e0a184 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -959,18 +959,30 @@ int dev_alloc_name(struct net_device *dev, const char *name)
 }
 EXPORT_SYMBOL(dev_alloc_name);
 
-static int dev_get_valid_name(struct net_device *dev, const char *name)
+static int dev_alloc_name_ns(struct net *net,
+			     struct net_device *dev,
+			     const char *name)
 {
-	struct net *net;
+	char buf[IFNAMSIZ];
+	int ret;
 
-	BUG_ON(!dev_net(dev));
-	net = dev_net(dev);
+	ret = __dev_alloc_name(net, name, buf);
+	if (ret >= 0)
+		strlcpy(dev->name, buf, IFNAMSIZ);
+	return ret;
+}
+
+static int dev_get_valid_name(struct net *net,
+			      struct net_device *dev,
+			      const char *name)
+{
+	BUG_ON(!net);
 
 	if (!dev_valid_name(name))
 		return -EINVAL;
 
 	if (strchr(name, '%'))
-		return dev_alloc_name(dev, name);
+		return dev_alloc_name_ns(net, dev, name);
 	else if (__dev_get_by_name(net, name))
 		return -EEXIST;
 	else if (dev->name != name)
@@ -1006,7 +1018,7 @@ int dev_change_name(struct net_device *dev, const char *newname)
 
 	memcpy(oldname, dev->name, IFNAMSIZ);
 
-	err = dev_get_valid_name(dev, newname);
+	err = dev_get_valid_name(net, dev, newname);
 	if (err < 0)
 		return err;
 
@@ -1109,11 +1121,23 @@ void netdev_state_change(struct net_device *dev)
 }
 EXPORT_SYMBOL(netdev_state_change);
 
-int netdev_bonding_change(struct net_device *dev, unsigned long event)
+/**
+ * 	netdev_notify_peers - notify network peers about existence of @dev
+ * 	@dev: network device
+ *
+ * Generate traffic such that interested network peers are aware of
+ * @dev, such as by generating a gratuitous ARP. This may be used when
+ * a device wants to inform the rest of the network about some sort of
+ * reconfiguration such as a failover event or virtual machine
+ * migration.
+ */
+void netdev_notify_peers(struct net_device *dev)
 {
-	return call_netdevice_notifiers(event, dev);
+	rtnl_lock();
+	call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, dev);
+	rtnl_unlock();
 }
-EXPORT_SYMBOL(netdev_bonding_change);
+EXPORT_SYMBOL(netdev_notify_peers);
 
 /**
  *	dev_load 	- load a network module
@@ -1394,7 +1418,6 @@ rollback:
 				nb->notifier_call(nb, NETDEV_DOWN, dev);
 			}
 			nb->notifier_call(nb, NETDEV_UNREGISTER, dev);
-			nb->notifier_call(nb, NETDEV_UNREGISTER_BATCH, dev);
 		}
 	}
 
@@ -1436,7 +1459,6 @@ int unregister_netdevice_notifier(struct notifier_block *nb)
 				nb->notifier_call(nb, NETDEV_DOWN, dev);
 			}
 			nb->notifier_call(nb, NETDEV_UNREGISTER, dev);
-			nb->notifier_call(nb, NETDEV_UNREGISTER_BATCH, dev);
 		}
 	}
 unlock:
@@ -2175,9 +2197,7 @@ EXPORT_SYMBOL(netif_skb_features);
 /*
  * Returns true if either:
  *	1. skb has frag_list and the device doesn't support FRAGLIST, or
- *	2. skb is fragmented and the device does not support SG, or if
- *	   at least one of fragments is in highmem and device does not
- *	   support DMA from it.
+ *	2. skb is fragmented and the device does not support SG.
  */
 static inline int skb_needs_linearize(struct sk_buff *skb,
 				      int features)
@@ -2206,9 +2226,6 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
 		if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
 			skb_dst_drop(skb);
 
-		if (!list_empty(&ptype_all))
-			dev_queue_xmit_nit(skb, dev);
-
 		features = netif_skb_features(skb);
 
 		if (vlan_tx_tag_present(skb) &&
@@ -2243,6 +2260,9 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
 			}
 		}
 
+		if (!list_empty(&ptype_all))
+			dev_queue_xmit_nit(skb, dev);
+
 		skb_len = skb->len;
 		rc = ops->ndo_start_xmit(skb, dev);
 		trace_net_dev_xmit(skb, rc, dev, skb_len);
@@ -2265,6 +2285,9 @@ gso:
 		if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
 			skb_dst_drop(nskb);
 
+		if (!list_empty(&ptype_all))
+			dev_queue_xmit_nit(nskb, dev);
+
 		skb_len = nskb->len;
 		rc = ops->ndo_start_xmit(nskb, dev);
 		trace_net_dev_xmit(nskb, rc, dev, skb_len);
@@ -2374,8 +2397,8 @@ static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb)
 #endif
 }
 
-static struct netdev_queue *dev_pick_tx(struct net_device *dev,
-					struct sk_buff *skb)
+struct netdev_queue *netdev_pick_tx(struct net_device *dev,
+				    struct sk_buff *skb)
 {
 	int queue_index;
 	const struct net_device_ops *ops = dev->netdev_ops;
@@ -2549,7 +2572,7 @@ int dev_queue_xmit(struct sk_buff *skb)
 
 	skb_update_prio(skb);
 
-	txq = dev_pick_tx(dev, skb);
+	txq = netdev_pick_tx(dev, skb);
 	q = rcu_dereference_bh(txq->qdisc);
 
 #ifdef CONFIG_NET_CLS_ACT
@@ -2622,6 +2645,8 @@ EXPORT_SYMBOL(dev_queue_xmit);
   =======================================================================*/
 
 int netdev_max_backlog __read_mostly = 1000;
+EXPORT_SYMBOL(netdev_max_backlog);
+
 int netdev_tstamp_prequeue __read_mostly = 1;
 int netdev_budget __read_mostly = 300;
 int weight_p __read_mostly = 64;            /* old backlog weight */
@@ -5239,12 +5264,12 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
  */
 static int dev_new_index(struct net *net)
 {
-	static int ifindex;
+	int ifindex = net->ifindex;
 	for (;;) {
 		if (++ifindex <= 0)
 			ifindex = 1;
 		if (!__dev_get_by_index(net, ifindex))
-			return ifindex;
+			return net->ifindex = ifindex;
 	}
 }
 
@@ -5322,10 +5347,6 @@ static void rollback_registered_many(struct list_head *head)
 		netdev_unregister_kobject(dev);
 	}
 
-	/* Process any work delayed until the end of the batch */
-	dev = list_first_entry(head, struct net_device, unreg_list);
-	call_netdevice_notifiers(NETDEV_UNREGISTER_BATCH, dev);
-
 	synchronize_net();
 
 	list_for_each_entry(dev, head, unreg_list)
@@ -5583,7 +5604,7 @@ int register_netdevice(struct net_device *dev)
 
 	dev->iflink = -1;
 
-	ret = dev_get_valid_name(dev, dev->name);
+	ret = dev_get_valid_name(net, dev, dev->name);
 	if (ret < 0)
 		goto out;
 
@@ -5597,7 +5618,12 @@ int register_netdevice(struct net_device *dev)
 		}
 	}
 
-	dev->ifindex = dev_new_index(net);
+	ret = -EBUSY;
+	if (!dev->ifindex)
+		dev->ifindex = dev_new_index(net);
+	else if (__dev_get_by_index(net, dev->ifindex))
+		goto err_uninit;
+
 	if (dev->iflink == -1)
 		dev->iflink = dev->ifindex;
 
@@ -5640,6 +5666,8 @@ int register_netdevice(struct net_device *dev)
 
 	set_bit(__LINK_STATE_PRESENT, &dev->state);
 
+	linkwatch_init_dev(dev);
+
 	dev_init_scheduler(dev);
 	dev_hold(dev);
 	list_netdevice(dev);
@@ -5773,9 +5801,12 @@ static void netdev_wait_allrefs(struct net_device *dev)
 
 			/* Rebroadcast unregister notification */
 			call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
-			/* don't resend NETDEV_UNREGISTER_BATCH, _BATCH users
-			 * should have already handle it the first time */
 
+			__rtnl_unlock();
+			rcu_barrier();
+			rtnl_lock();
+
+			call_netdevice_notifiers(NETDEV_UNREGISTER_FINAL, dev);
 			if (test_bit(__LINK_STATE_LINKWATCH_PENDING,
 				     &dev->state)) {
 				/* We must not have linkwatch events
@@ -5837,9 +5868,8 @@ void netdev_run_todo(void)
 
 	__rtnl_unlock();
 
-	/* Wait for rcu callbacks to finish before attempting to drain
-	 * the device list.  This usually avoids a 250ms wait.
-	 */
+
+	/* Wait for rcu callbacks to finish before next phase */
 	if (!list_empty(&list))
 		rcu_barrier();
 
@@ -5848,6 +5878,10 @@ void netdev_run_todo(void)
 			= list_first_entry(&list, struct net_device, todo_list);
 		list_del(&dev->todo_list);
 
+		rtnl_lock();
+		call_netdevice_notifiers(NETDEV_UNREGISTER_FINAL, dev);
+		__rtnl_unlock();
+
 		if (unlikely(dev->reg_state != NETREG_UNREGISTERING)) {
 			pr_err("network todo '%s' but state %d\n",
 			       dev->name, dev->reg_state);
@@ -5943,6 +5977,8 @@ struct netdev_queue *dev_ingress_queue_create(struct net_device *dev)
 	return queue;
 }
 
+static const struct ethtool_ops default_ethtool_ops;
+
 /**
  *	alloc_netdev_mqs - allocate network device
  *	@sizeof_priv:	size of private data to allocate space for
@@ -6030,6 +6066,8 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
 
 	strcpy(dev->name, name);
 	dev->group = INIT_NETDEV_GROUP;
+	if (!dev->ethtool_ops)
+		dev->ethtool_ops = &default_ethtool_ops;
 	return dev;
 
 free_all:
@@ -6214,7 +6252,7 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
 		/* We get here if we can't use the current device name */
 		if (!pat)
 			goto out;
-		if (dev_get_valid_name(dev, pat) < 0)
+		if (dev_get_valid_name(net, dev, pat) < 0)
 			goto out;
 	}
 
@@ -6242,7 +6280,8 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
 	   the device is just moving and can keep their slaves up.
 	*/
 	call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
-	call_netdevice_notifiers(NETDEV_UNREGISTER_BATCH, dev);
+	rcu_barrier();
+	call_netdevice_notifiers(NETDEV_UNREGISTER_FINAL, dev);
 	rtmsg_ifinfo(RTM_DELLINK, dev, ~0U);
 
 	/*
diff --git a/net/core/dev_addr_lists.c b/net/core/dev_addr_lists.c
index c4cc2bc..87cc17d 100644
--- a/net/core/dev_addr_lists.c
+++ b/net/core/dev_addr_lists.c
@@ -22,7 +22,7 @@
  */
 
 static int __hw_addr_create_ex(struct netdev_hw_addr_list *list,
-			       unsigned char *addr, int addr_len,
+			       const unsigned char *addr, int addr_len,
 			       unsigned char addr_type, bool global)
 {
 	struct netdev_hw_addr *ha;
@@ -46,7 +46,7 @@ static int __hw_addr_create_ex(struct netdev_hw_addr_list *list,
 }
 
 static int __hw_addr_add_ex(struct netdev_hw_addr_list *list,
-			    unsigned char *addr, int addr_len,
+			    const unsigned char *addr, int addr_len,
 			    unsigned char addr_type, bool global)
 {
 	struct netdev_hw_addr *ha;
@@ -72,14 +72,15 @@ static int __hw_addr_add_ex(struct netdev_hw_addr_list *list,
 	return __hw_addr_create_ex(list, addr, addr_len, addr_type, global);
 }
 
-static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr,
-			 int addr_len, unsigned char addr_type)
+static int __hw_addr_add(struct netdev_hw_addr_list *list,
+			 const unsigned char *addr, int addr_len,
+			 unsigned char addr_type)
 {
 	return __hw_addr_add_ex(list, addr, addr_len, addr_type, false);
 }
 
 static int __hw_addr_del_ex(struct netdev_hw_addr_list *list,
-			    unsigned char *addr, int addr_len,
+			    const unsigned char *addr, int addr_len,
 			    unsigned char addr_type, bool global)
 {
 	struct netdev_hw_addr *ha;
@@ -104,8 +105,9 @@ static int __hw_addr_del_ex(struct netdev_hw_addr_list *list,
 	return -ENOENT;
 }
 
-static int __hw_addr_del(struct netdev_hw_addr_list *list, unsigned char *addr,
-			 int addr_len, unsigned char addr_type)
+static int __hw_addr_del(struct netdev_hw_addr_list *list,
+			 const unsigned char *addr, int addr_len,
+			 unsigned char addr_type)
 {
 	return __hw_addr_del_ex(list, addr, addr_len, addr_type, false);
 }
@@ -278,7 +280,7 @@ EXPORT_SYMBOL(dev_addr_init);
  *
  *	The caller must hold the rtnl_mutex.
  */
-int dev_addr_add(struct net_device *dev, unsigned char *addr,
+int dev_addr_add(struct net_device *dev, const unsigned char *addr,
 		 unsigned char addr_type)
 {
 	int err;
@@ -303,7 +305,7 @@ EXPORT_SYMBOL(dev_addr_add);
  *
  *	The caller must hold the rtnl_mutex.
  */
-int dev_addr_del(struct net_device *dev, unsigned char *addr,
+int dev_addr_del(struct net_device *dev, const unsigned char *addr,
 		 unsigned char addr_type)
 {
 	int err;
@@ -390,7 +392,7 @@ EXPORT_SYMBOL(dev_addr_del_multiple);
  *	@dev: device
  *	@addr: address to add
  */
-int dev_uc_add_excl(struct net_device *dev, unsigned char *addr)
+int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr)
 {
 	struct netdev_hw_addr *ha;
 	int err;
@@ -421,7 +423,7 @@ EXPORT_SYMBOL(dev_uc_add_excl);
  *	Add a secondary unicast address to the device or increase
  *	the reference count if it already exists.
  */
-int dev_uc_add(struct net_device *dev, unsigned char *addr)
+int dev_uc_add(struct net_device *dev, const unsigned char *addr)
 {
 	int err;
 
@@ -443,7 +445,7 @@ EXPORT_SYMBOL(dev_uc_add);
  *	Release reference to a secondary unicast address and remove it
  *	from the device if the reference count drops to zero.
  */
-int dev_uc_del(struct net_device *dev, unsigned char *addr)
+int dev_uc_del(struct net_device *dev, const unsigned char *addr)
 {
 	int err;
 
@@ -543,7 +545,7 @@ EXPORT_SYMBOL(dev_uc_init);
  *	@dev: device
  *	@addr: address to add
  */
-int dev_mc_add_excl(struct net_device *dev, unsigned char *addr)
+int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr)
 {
 	struct netdev_hw_addr *ha;
 	int err;
@@ -566,7 +568,7 @@ out:
 }
 EXPORT_SYMBOL(dev_mc_add_excl);
 
-static int __dev_mc_add(struct net_device *dev, unsigned char *addr,
+static int __dev_mc_add(struct net_device *dev, const unsigned char *addr,
 			bool global)
 {
 	int err;
@@ -587,7 +589,7 @@ static int __dev_mc_add(struct net_device *dev, unsigned char *addr,
  *	Add a multicast address to the device or increase
  *	the reference count if it already exists.
  */
-int dev_mc_add(struct net_device *dev, unsigned char *addr)
+int dev_mc_add(struct net_device *dev, const unsigned char *addr)
 {
 	return __dev_mc_add(dev, addr, false);
 }
@@ -600,13 +602,13 @@ EXPORT_SYMBOL(dev_mc_add);
  *
  *	Add a global multicast address to the device.
  */
-int dev_mc_add_global(struct net_device *dev, unsigned char *addr)
+int dev_mc_add_global(struct net_device *dev, const unsigned char *addr)
 {
 	return __dev_mc_add(dev, addr, true);
 }
 EXPORT_SYMBOL(dev_mc_add_global);
 
-static int __dev_mc_del(struct net_device *dev, unsigned char *addr,
+static int __dev_mc_del(struct net_device *dev, const unsigned char *addr,
 			bool global)
 {
 	int err;
@@ -628,7 +630,7 @@ static int __dev_mc_del(struct net_device *dev, unsigned char *addr,
  *	Release reference to a multicast address and remove it
  *	from the device if the reference count drops to zero.
  */
-int dev_mc_del(struct net_device *dev, unsigned char *addr)
+int dev_mc_del(struct net_device *dev, const unsigned char *addr)
 {
 	return __dev_mc_del(dev, addr, false);
 }
@@ -642,7 +644,7 @@ EXPORT_SYMBOL(dev_mc_del);
  *	Release reference to a multicast address and remove it
  *	from the device if the reference count drops to zero.
  */
-int dev_mc_del_global(struct net_device *dev, unsigned char *addr)
+int dev_mc_del_global(struct net_device *dev, const unsigned char *addr)
 {
 	return __dev_mc_del(dev, addr, true);
 }
diff --git a/net/core/dst.c b/net/core/dst.c
index b8d7c70..ee6153e 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -374,7 +374,7 @@ static int dst_dev_event(struct notifier_block *this, unsigned long event,
 	struct dst_entry *dst, *last = NULL;
 
 	switch (event) {
-	case NETDEV_UNREGISTER:
+	case NETDEV_UNREGISTER_FINAL:
 	case NETDEV_DOWN:
 		mutex_lock(&dst_gc_mutex);
 		for (dst = dst_busy_list; dst; dst = dst->next) {
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index cbf033d..4d64cc2 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1426,18 +1426,6 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
 	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
 		return -EFAULT;
 
-	if (!dev->ethtool_ops) {
-		/* A few commands do not require any driver support,
-		 * are unprivileged, and do not change anything, so we
-		 * can take a shortcut to them. */
-		if (ethcmd == ETHTOOL_GDRVINFO)
-			return ethtool_get_drvinfo(dev, useraddr);
-		else if (ethcmd == ETHTOOL_GET_TS_INFO)
-			return ethtool_get_ts_info(dev, useraddr);
-		else
-			return -EOPNOTSUPP;
-	}
-
 	/* Allow some commands to be done by anyone */
 	switch (ethcmd) {
 	case ETHTOOL_GSET:
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index ab7db83..58a4ba2 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -402,7 +402,7 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 	if (unresolved)
 		ops->unresolved_rules++;
 
-	notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).pid);
+	notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).portid);
 	flush_route_cache(ops);
 	rules_ops_put(ops);
 	return 0;
@@ -500,7 +500,7 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 		}
 
 		notify_rule_change(RTM_DELRULE, rule, ops, nlh,
-				   NETLINK_CB(skb).pid);
+				   NETLINK_CB(skb).portid);
 		if (ops->delete)
 			ops->delete(rule);
 		fib_rule_put(rule);
@@ -601,7 +601,7 @@ static int dump_rules(struct sk_buff *skb, struct netlink_callback *cb,
 		if (idx < cb->args[1])
 			goto skip;
 
-		if (fib_nl_fill_rule(skb, rule, NETLINK_CB(cb->skb).pid,
+		if (fib_nl_fill_rule(skb, rule, NETLINK_CB(cb->skb).portid,
 				     cb->nlh->nlmsg_seq, RTM_NEWRULE,
 				     NLM_F_MULTI, ops) < 0)
 			break;
diff --git a/net/core/filter.c b/net/core/filter.c
index 907efd2..3d92ebb 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -167,6 +167,14 @@ unsigned int sk_run_filter(const struct sk_buff *skb,
 		case BPF_S_ALU_DIV_K:
 			A = reciprocal_divide(A, K);
 			continue;
+		case BPF_S_ALU_MOD_X:
+			if (X == 0)
+				return 0;
+			A %= X;
+			continue;
+		case BPF_S_ALU_MOD_K:
+			A %= K;
+			continue;
 		case BPF_S_ALU_AND_X:
 			A &= X;
 			continue;
@@ -179,6 +187,13 @@ unsigned int sk_run_filter(const struct sk_buff *skb,
 		case BPF_S_ALU_OR_K:
 			A |= K;
 			continue;
+		case BPF_S_ANC_ALU_XOR_X:
+		case BPF_S_ALU_XOR_X:
+			A ^= X;
+			continue;
+		case BPF_S_ALU_XOR_K:
+			A ^= K;
+			continue;
 		case BPF_S_ALU_LSH_X:
 			A <<= X;
 			continue;
@@ -326,9 +341,6 @@ load_b:
 		case BPF_S_ANC_CPU:
 			A = raw_smp_processor_id();
 			continue;
-		case BPF_S_ANC_ALU_XOR_X:
-			A ^= X;
-			continue;
 		case BPF_S_ANC_NLATTR: {
 			struct nlattr *nla;
 
@@ -469,10 +481,14 @@ int sk_chk_filter(struct sock_filter *filter, unsigned int flen)
 		[BPF_ALU|BPF_MUL|BPF_K]  = BPF_S_ALU_MUL_K,
 		[BPF_ALU|BPF_MUL|BPF_X]  = BPF_S_ALU_MUL_X,
 		[BPF_ALU|BPF_DIV|BPF_X]  = BPF_S_ALU_DIV_X,
+		[BPF_ALU|BPF_MOD|BPF_K]  = BPF_S_ALU_MOD_K,
+		[BPF_ALU|BPF_MOD|BPF_X]  = BPF_S_ALU_MOD_X,
 		[BPF_ALU|BPF_AND|BPF_K]  = BPF_S_ALU_AND_K,
 		[BPF_ALU|BPF_AND|BPF_X]  = BPF_S_ALU_AND_X,
 		[BPF_ALU|BPF_OR|BPF_K]   = BPF_S_ALU_OR_K,
 		[BPF_ALU|BPF_OR|BPF_X]   = BPF_S_ALU_OR_X,
+		[BPF_ALU|BPF_XOR|BPF_K]  = BPF_S_ALU_XOR_K,
+		[BPF_ALU|BPF_XOR|BPF_X]  = BPF_S_ALU_XOR_X,
 		[BPF_ALU|BPF_LSH|BPF_K]  = BPF_S_ALU_LSH_K,
 		[BPF_ALU|BPF_LSH|BPF_X]  = BPF_S_ALU_LSH_X,
 		[BPF_ALU|BPF_RSH|BPF_K]  = BPF_S_ALU_RSH_K,
@@ -531,6 +547,11 @@ int sk_chk_filter(struct sock_filter *filter, unsigned int flen)
 				return -EINVAL;
 			ftest->k = reciprocal_value(ftest->k);
 			break;
+		case BPF_S_ALU_MOD_K:
+			/* check for division by zero */
+			if (ftest->k == 0)
+				return -EINVAL;
+			break;
 		case BPF_S_LD_MEM:
 		case BPF_S_LDX_MEM:
 		case BPF_S_ST:
diff --git a/net/core/link_watch.c b/net/core/link_watch.c
index 8e397a6..8f82a5c 100644
--- a/net/core/link_watch.c
+++ b/net/core/link_watch.c
@@ -76,6 +76,14 @@ static void rfc2863_policy(struct net_device *dev)
 }
 
 
+void linkwatch_init_dev(struct net_device *dev)
+{
+	/* Handle pre-registration link state changes */
+	if (!netif_carrier_ok(dev) || netif_dormant(dev))
+		rfc2863_policy(dev);
+}
+
+
 static bool linkwatch_urgent_event(struct net_device *dev)
 {
 	if (!netif_running(dev))
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 112c6e2..baca771 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -2102,7 +2102,7 @@ static int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
 		if (tidx < tbl_skip || (family && tbl->family != family))
 			continue;
 
-		if (neightbl_fill_info(skb, tbl, NETLINK_CB(cb->skb).pid,
+		if (neightbl_fill_info(skb, tbl, NETLINK_CB(cb->skb).portid,
 				       cb->nlh->nlmsg_seq, RTM_NEWNEIGHTBL,
 				       NLM_F_MULTI) <= 0)
 			break;
@@ -2115,7 +2115,7 @@ static int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
 				goto next;
 
 			if (neightbl_fill_param_info(skb, tbl, p,
-						     NETLINK_CB(cb->skb).pid,
+						     NETLINK_CB(cb->skb).portid,
 						     cb->nlh->nlmsg_seq,
 						     RTM_NEWNEIGHTBL,
 						     NLM_F_MULTI) <= 0)
@@ -2244,7 +2244,7 @@ static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
 				continue;
 			if (idx < s_idx)
 				goto next;
-			if (neigh_fill_info(skb, n, NETLINK_CB(cb->skb).pid,
+			if (neigh_fill_info(skb, n, NETLINK_CB(cb->skb).portid,
 					    cb->nlh->nlmsg_seq,
 					    RTM_NEWNEIGH,
 					    NLM_F_MULTI) <= 0) {
@@ -2281,7 +2281,7 @@ static int pneigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
 				continue;
 			if (idx < s_idx)
 				goto next;
-			if (pneigh_fill_info(skb, n, NETLINK_CB(cb->skb).pid,
+			if (pneigh_fill_info(skb, n, NETLINK_CB(cb->skb).portid,
 					    cb->nlh->nlmsg_seq,
 					    RTM_NEWNEIGH,
 					    NLM_F_MULTI, tbl) <= 0) {
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 7260717..bcf02f6 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -166,9 +166,21 @@ static ssize_t show_duplex(struct device *dev,
 
 	if (netif_running(netdev)) {
 		struct ethtool_cmd cmd;
-		if (!__ethtool_get_settings(netdev, &cmd))
-			ret = sprintf(buf, "%s\n",
-				      cmd.duplex ? "full" : "half");
+		if (!__ethtool_get_settings(netdev, &cmd)) {
+			const char *duplex;
+			switch (cmd.duplex) {
+			case DUPLEX_HALF:
+				duplex = "half";
+				break;
+			case DUPLEX_FULL:
+				duplex = "full";
+				break;
+			default:
+				duplex = "unknown";
+				break;
+			}
+			ret = sprintf(buf, "%s\n", duplex);
+		}
 	}
 	rtnl_unlock();
 	return ret;
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index e4ba3e7..77a0388 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -328,7 +328,7 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
 	if (skb_queue_len(&npinfo->txq) == 0 && !netpoll_owner_active(dev)) {
 		struct netdev_queue *txq;
 
-		txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
+		txq = netdev_pick_tx(dev, skb);
 
 		/* try until next clock tick */
 		for (tries = jiffies_to_usecs(1)/USEC_PER_POLL;
@@ -380,6 +380,7 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
 	struct udphdr *udph;
 	struct iphdr *iph;
 	struct ethhdr *eth;
+	static atomic_t ip_ident;
 
 	udp_len = len + sizeof(*udph);
 	ip_len = udp_len + sizeof(*iph);
@@ -415,7 +416,7 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
 	put_unaligned(0x45, (unsigned char *)iph);
 	iph->tos      = 0;
 	put_unaligned(htons(ip_len), &(iph->tot_len));
-	iph->id       = 0;
+	iph->id       = htons(atomic_inc_return(&ip_ident));
 	iph->frag_off = 0;
 	iph->ttl      = 64;
 	iph->protocol = IPPROTO_UDP;
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 39e7e4d..4a83fb3 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -73,7 +73,6 @@ static int extend_netdev_table(struct net_device *dev, u32 new_len)
 			   ((sizeof(u32) * new_len));
 	struct netprio_map *new_priomap = kzalloc(new_size, GFP_KERNEL);
 	struct netprio_map *old_priomap;
-	int i;
 
 	old_priomap  = rtnl_dereference(dev->priomap);
 
@@ -82,10 +81,10 @@ static int extend_netdev_table(struct net_device *dev, u32 new_len)
 		return -ENOMEM;
 	}
 
-	for (i = 0;
-	     old_priomap && (i < old_priomap->priomap_len);
-	     i++)
-		new_priomap->priomap[i] = old_priomap->priomap[i];
+	if (old_priomap)
+		memcpy(new_priomap->priomap, old_priomap->priomap,
+		       old_priomap->priomap_len *
+		       sizeof(old_priomap->priomap[0]));
 
 	new_priomap->priomap_len = new_len;
 
@@ -109,32 +108,6 @@ static int write_update_netdev_table(struct net_device *dev)
 	return ret;
 }
 
-static int update_netdev_tables(void)
-{
-	int ret = 0;
-	struct net_device *dev;
-	u32 max_len;
-	struct netprio_map *map;
-
-	rtnl_lock();
-	max_len = atomic_read(&max_prioidx) + 1;
-	for_each_netdev(&init_net, dev) {
-		map = rtnl_dereference(dev->priomap);
-		/*
-		 * don't allocate priomap if we didn't
-		 * change net_prio.ifpriomap (map == NULL),
-		 * this will speed up skb_update_prio.
-		 */
-		if (map && map->priomap_len < max_len) {
-			ret = extend_netdev_table(dev, max_len);
-			if (ret < 0)
-				break;
-		}
-	}
-	rtnl_unlock();
-	return ret;
-}
-
 static struct cgroup_subsys_state *cgrp_create(struct cgroup *cgrp)
 {
 	struct cgroup_netprio_state *cs;
@@ -153,12 +126,6 @@ static struct cgroup_subsys_state *cgrp_create(struct cgroup *cgrp)
 		goto out;
 	}
 
-	ret = update_netdev_tables();
-	if (ret < 0) {
-		put_prioidx(cs->prioidx);
-		goto out;
-	}
-
 	return &cs->css;
 out:
 	kfree(cs);
diff --git a/net/core/request_sock.c b/net/core/request_sock.c
index 9b570a6..c31d9e8 100644
--- a/net/core/request_sock.c
+++ b/net/core/request_sock.c
@@ -15,6 +15,7 @@
 #include <linux/random.h>
 #include <linux/slab.h>
 #include <linux/string.h>
+#include <linux/tcp.h>
 #include <linux/vmalloc.h>
 
 #include <net/request_sock.h>
@@ -130,3 +131,97 @@ void reqsk_queue_destroy(struct request_sock_queue *queue)
 		kfree(lopt);
 }
 
+/*
+ * This function is called to set a Fast Open socket's "fastopen_rsk" field
+ * to NULL when a TFO socket no longer needs to access the request_sock.
+ * This happens only after 3WHS has been either completed or aborted (e.g.,
+ * RST is received).
+ *
+ * Before TFO, a child socket is created only after 3WHS is completed,
+ * hence it never needs to access the request_sock. things get a lot more
+ * complex with TFO. A child socket, accepted or not, has to access its
+ * request_sock for 3WHS processing, e.g., to retransmit SYN-ACK pkts,
+ * until 3WHS is either completed or aborted. Afterwards the req will stay
+ * until either the child socket is accepted, or in the rare case when the
+ * listener is closed before the child is accepted.
+ *
+ * In short, a request socket is only freed after BOTH 3WHS has completed
+ * (or aborted) and the child socket has been accepted (or listener closed).
+ * When a child socket is accepted, its corresponding req->sk is set to
+ * NULL since it's no longer needed. More importantly, "req->sk == NULL"
+ * will be used by the code below to determine if a child socket has been
+ * accepted or not, and the check is protected by the fastopenq->lock
+ * described below.
+ *
+ * Note that fastopen_rsk is only accessed from the child socket's context
+ * with its socket lock held. But a request_sock (req) can be accessed by
+ * both its child socket through fastopen_rsk, and a listener socket through
+ * icsk_accept_queue.rskq_accept_head. To protect the access a simple spin
+ * lock per listener "icsk->icsk_accept_queue.fastopenq->lock" is created.
+ * only in the rare case when both the listener and the child locks are held,
+ * e.g., in inet_csk_listen_stop() do we not need to acquire the lock.
+ * The lock also protects other fields such as fastopenq->qlen, which is
+ * decremented by this function when fastopen_rsk is no longer needed.
+ *
+ * Note that another solution was to simply use the existing socket lock
+ * from the listener. But first socket lock is difficult to use. It is not
+ * a simple spin lock - one must consider sock_owned_by_user() and arrange
+ * to use sk_add_backlog() stuff. But what really makes it infeasible is the
+ * locking hierarchy violation. E.g., inet_csk_listen_stop() may try to
+ * acquire a child's lock while holding listener's socket lock. A corner
+ * case might also exist in tcp_v4_hnd_req() that will trigger this locking
+ * order.
+ *
+ * When a TFO req is created, it needs to sock_hold its listener to prevent
+ * the latter data structure from going away.
+ *
+ * This function also sets "treq->listener" to NULL and unreference listener
+ * socket. treq->listener is used by the listener so it is protected by the
+ * fastopenq->lock in this function.
+ */
+void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
+			   bool reset)
+{
+	struct sock *lsk = tcp_rsk(req)->listener;
+	struct fastopen_queue *fastopenq =
+	    inet_csk(lsk)->icsk_accept_queue.fastopenq;
+
+	BUG_ON(!spin_is_locked(&sk->sk_lock.slock) && !sock_owned_by_user(sk));
+
+	tcp_sk(sk)->fastopen_rsk = NULL;
+	spin_lock_bh(&fastopenq->lock);
+	fastopenq->qlen--;
+	tcp_rsk(req)->listener = NULL;
+	if (req->sk)	/* the child socket hasn't been accepted yet */
+		goto out;
+
+	if (!reset || lsk->sk_state != TCP_LISTEN) {
+		/* If the listener has been closed don't bother with the
+		 * special RST handling below.
+		 */
+		spin_unlock_bh(&fastopenq->lock);
+		sock_put(lsk);
+		reqsk_free(req);
+		return;
+	}
+	/* Wait for 60secs before removing a req that has triggered RST.
+	 * This is a simple defense against TFO spoofing attack - by
+	 * counting the req against fastopen.max_qlen, and disabling
+	 * TFO when the qlen exceeds max_qlen.
+	 *
+	 * For more details see CoNext'11 "TCP Fast Open" paper.
+	 */
+	req->expires = jiffies + 60*HZ;
+	if (fastopenq->rskq_rst_head == NULL)
+		fastopenq->rskq_rst_head = req;
+	else
+		fastopenq->rskq_rst_tail->dl_next = req;
+
+	req->dl_next = NULL;
+	fastopenq->rskq_rst_tail = req;
+	fastopenq->qlen++;
+out:
+	spin_unlock_bh(&fastopenq->lock);
+	sock_put(lsk);
+	return;
+}
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 2c5a0a0..76d4c2c 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -618,7 +618,7 @@ int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
 		       long expires, u32 error)
 {
 	struct rta_cacheinfo ci = {
-		.rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
+		.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
 		.rta_used = dst->__use,
 		.rta_clntref = atomic_read(&(dst->__refcnt)),
 		.rta_error = error,
@@ -1081,7 +1081,7 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
 			if (idx < s_idx)
 				goto cont;
 			if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
-					     NETLINK_CB(cb->skb).pid,
+					     NETLINK_CB(cb->skb).portid,
 					     cb->nlh->nlmsg_seq, 0,
 					     NLM_F_MULTI,
 					     ext_filter_mask) <= 0)
@@ -1812,8 +1812,6 @@ replay:
 			return -ENODEV;
 		}
 
-		if (ifm->ifi_index)
-			return -EOPNOTSUPP;
 		if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
 			return -EOPNOTSUPP;
 
@@ -1839,10 +1837,14 @@ replay:
 			return PTR_ERR(dest_net);
 
 		dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
-
-		if (IS_ERR(dev))
+		if (IS_ERR(dev)) {
 			err = PTR_ERR(dev);
-		else if (ops->newlink)
+			goto out;
+		}
+
+		dev->ifindex = ifm->ifi_index;
+
+		if (ops->newlink)
 			err = ops->newlink(net, dev, tb, data);
 		else
 			err = register_netdevice(dev);
@@ -1897,14 +1899,14 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 	if (nskb == NULL)
 		return -ENOBUFS;
 
-	err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
+	err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
 			       nlh->nlmsg_seq, 0, 0, ext_filter_mask);
 	if (err < 0) {
 		/* -EMSGSIZE implies BUG in if_nlmsg_size */
 		WARN_ON(err == -EMSGSIZE);
 		kfree_skb(nskb);
 	} else
-		err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
+		err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
 
 	return err;
 }
@@ -2088,7 +2090,8 @@ static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 	if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
 	    (dev->priv_flags & IFF_BRIDGE_PORT)) {
 		master = dev->master;
-		err = master->netdev_ops->ndo_fdb_add(ndm, dev, addr,
+		err = master->netdev_ops->ndo_fdb_add(ndm, tb,
+						      dev, addr,
 						      nlh->nlmsg_flags);
 		if (err)
 			goto out;
@@ -2098,7 +2101,8 @@ static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 
 	/* Embedded bridge, macvlan, and any other device support */
 	if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
-		err = dev->netdev_ops->ndo_fdb_add(ndm, dev, addr,
+		err = dev->netdev_ops->ndo_fdb_add(ndm, tb,
+						   dev, addr,
 						   nlh->nlmsg_flags);
 
 		if (!err) {
@@ -2178,9 +2182,9 @@ static int nlmsg_populate_fdb(struct sk_buff *skb,
 {
 	struct netdev_hw_addr *ha;
 	int err;
-	u32 pid, seq;
+	u32 portid, seq;
 
-	pid = NETLINK_CB(cb->skb).pid;
+	portid = NETLINK_CB(cb->skb).portid;
 	seq = cb->nlh->nlmsg_seq;
 
 	list_for_each_entry(ha, &list->list, list) {
@@ -2188,7 +2192,7 @@ static int nlmsg_populate_fdb(struct sk_buff *skb,
 			goto skip;
 
 		err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
-					      pid, seq, 0, NTF_SELF);
+					      portid, seq, 0, NTF_SELF);
 		if (err < 0)
 			return err;
 skip:
@@ -2356,7 +2360,7 @@ static int rtnetlink_event(struct notifier_block *this, unsigned long event, voi
 	case NETDEV_PRE_TYPE_CHANGE:
 	case NETDEV_GOING_DOWN:
 	case NETDEV_UNREGISTER:
-	case NETDEV_UNREGISTER_BATCH:
+	case NETDEV_UNREGISTER_FINAL:
 	case NETDEV_RELEASE:
 	case NETDEV_JOIN:
 		break;
@@ -2379,9 +2383,10 @@ static int __net_init rtnetlink_net_init(struct net *net)
 		.groups		= RTNLGRP_MAX,
 		.input		= rtnetlink_rcv,
 		.cb_mutex	= &rtnl_mutex,
+		.flags		= NL_CFG_F_NONROOT_RECV,
 	};
 
-	sk = netlink_kernel_create(net, NETLINK_ROUTE, THIS_MODULE, &cfg);
+	sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
 	if (!sk)
 		return -ENOMEM;
 	net->rtnl = sk;
@@ -2414,7 +2419,6 @@ void __init rtnetlink_init(void)
 	if (register_pernet_subsys(&rtnetlink_net_ops))
 		panic("rtnetlink_init: cannot initialize rtnetlink\n");
 
-	netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
 	register_netdevice_notifier(&rtnetlink_dev_notifier);
 
 	rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
diff --git a/net/core/scm.c b/net/core/scm.c
index 6ab491d..9c1c63d 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -155,19 +155,21 @@ int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p)
 			break;
 		case SCM_CREDENTIALS:
 		{
+			struct ucred creds;
 			kuid_t uid;
 			kgid_t gid;
 			if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct ucred)))
 				goto error;
-			memcpy(&p->creds, CMSG_DATA(cmsg), sizeof(struct ucred));
-			err = scm_check_creds(&p->creds);
+			memcpy(&creds, CMSG_DATA(cmsg), sizeof(struct ucred));
+			err = scm_check_creds(&creds);
 			if (err)
 				goto error;
 
-			if (!p->pid || pid_vnr(p->pid) != p->creds.pid) {
+			p->creds.pid = creds.pid;
+			if (!p->pid || pid_vnr(p->pid) != creds.pid) {
 				struct pid *pid;
 				err = -ESRCH;
-				pid = find_get_pid(p->creds.pid);
+				pid = find_get_pid(creds.pid);
 				if (!pid)
 					goto error;
 				put_pid(p->pid);
@@ -175,11 +177,14 @@ int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p)
 			}
 
 			err = -EINVAL;
-			uid = make_kuid(current_user_ns(), p->creds.uid);
-			gid = make_kgid(current_user_ns(), p->creds.gid);
+			uid = make_kuid(current_user_ns(), creds.uid);
+			gid = make_kgid(current_user_ns(), creds.gid);
 			if (!uid_valid(uid) || !gid_valid(gid))
 				goto error;
 
+			p->creds.uid = uid;
+			p->creds.gid = gid;
+
 			if (!p->cred ||
 			    !uid_eq(p->cred->euid, uid) ||
 			    !gid_eq(p->cred->egid, gid)) {
diff --git a/net/core/secure_seq.c b/net/core/secure_seq.c
index 99b2596..e61a8bb 100644
--- a/net/core/secure_seq.c
+++ b/net/core/secure_seq.c
@@ -76,6 +76,7 @@ u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
 
 	return hash[0];
 }
+EXPORT_SYMBOL(secure_ipv6_port_ephemeral);
 #endif
 
 #ifdef CONFIG_INET
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index e33ebae..cdc2859 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -340,43 +340,57 @@ struct sk_buff *build_skb(void *data, unsigned int frag_size)
 EXPORT_SYMBOL(build_skb);
 
 struct netdev_alloc_cache {
-	struct page *page;
-	unsigned int offset;
-	unsigned int pagecnt_bias;
+	struct page_frag	frag;
+	/* we maintain a pagecount bias, so that we dont dirty cache line
+	 * containing page->_count every time we allocate a fragment.
+	 */
+	unsigned int		pagecnt_bias;
 };
 static DEFINE_PER_CPU(struct netdev_alloc_cache, netdev_alloc_cache);
 
-#define NETDEV_PAGECNT_BIAS (PAGE_SIZE / SMP_CACHE_BYTES)
+#define NETDEV_FRAG_PAGE_MAX_ORDER get_order(32768)
+#define NETDEV_FRAG_PAGE_MAX_SIZE  (PAGE_SIZE << NETDEV_FRAG_PAGE_MAX_ORDER)
+#define NETDEV_PAGECNT_MAX_BIAS	   NETDEV_FRAG_PAGE_MAX_SIZE
 
 static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask)
 {
 	struct netdev_alloc_cache *nc;
 	void *data = NULL;
+	int order;
 	unsigned long flags;
 
 	local_irq_save(flags);
 	nc = &__get_cpu_var(netdev_alloc_cache);
-	if (unlikely(!nc->page)) {
+	if (unlikely(!nc->frag.page)) {
 refill:
-		nc->page = alloc_page(gfp_mask);
-		if (unlikely(!nc->page))
-			goto end;
+		for (order = NETDEV_FRAG_PAGE_MAX_ORDER; ;) {
+			gfp_t gfp = gfp_mask;
+
+			if (order)
+				gfp |= __GFP_COMP | __GFP_NOWARN;
+			nc->frag.page = alloc_pages(gfp, order);
+			if (likely(nc->frag.page))
+				break;
+			if (--order < 0)
+				goto end;
+		}
+		nc->frag.size = PAGE_SIZE << order;
 recycle:
-		atomic_set(&nc->page->_count, NETDEV_PAGECNT_BIAS);
-		nc->pagecnt_bias = NETDEV_PAGECNT_BIAS;
-		nc->offset = 0;
+		atomic_set(&nc->frag.page->_count, NETDEV_PAGECNT_MAX_BIAS);
+		nc->pagecnt_bias = NETDEV_PAGECNT_MAX_BIAS;
+		nc->frag.offset = 0;
 	}
 
-	if (nc->offset + fragsz > PAGE_SIZE) {
+	if (nc->frag.offset + fragsz > nc->frag.size) {
 		/* avoid unnecessary locked operations if possible */
-		if ((atomic_read(&nc->page->_count) == nc->pagecnt_bias) ||
-		    atomic_sub_and_test(nc->pagecnt_bias, &nc->page->_count))
+		if ((atomic_read(&nc->frag.page->_count) == nc->pagecnt_bias) ||
+		    atomic_sub_and_test(nc->pagecnt_bias, &nc->frag.page->_count))
 			goto recycle;
 		goto refill;
 	}
 
-	data = page_address(nc->page) + nc->offset;
-	nc->offset += fragsz;
+	data = page_address(nc->frag.page) + nc->frag.offset;
+	nc->frag.offset += fragsz;
 	nc->pagecnt_bias--;
 end:
 	local_irq_restore(flags);
@@ -1655,38 +1669,19 @@ static struct page *linear_to_page(struct page *page, unsigned int *len,
 				   unsigned int *offset,
 				   struct sk_buff *skb, struct sock *sk)
 {
-	struct page *p = sk->sk_sndmsg_page;
-	unsigned int off;
-
-	if (!p) {
-new_page:
-		p = sk->sk_sndmsg_page = alloc_pages(sk->sk_allocation, 0);
-		if (!p)
-			return NULL;
+	struct page_frag *pfrag = sk_page_frag(sk);
 
-		off = sk->sk_sndmsg_off = 0;
-		/* hold one ref to this page until it's full */
-	} else {
-		unsigned int mlen;
-
-		/* If we are the only user of the page, we can reset offset */
-		if (page_count(p) == 1)
-			sk->sk_sndmsg_off = 0;
-		off = sk->sk_sndmsg_off;
-		mlen = PAGE_SIZE - off;
-		if (mlen < 64 && mlen < *len) {
-			put_page(p);
-			goto new_page;
-		}
+	if (!sk_page_frag_refill(sk, pfrag))
+		return NULL;
 
-		*len = min_t(unsigned int, *len, mlen);
-	}
+	*len = min_t(unsigned int, *len, pfrag->size - pfrag->offset);
 
-	memcpy(page_address(p) + off, page_address(page) + *offset, *len);
-	sk->sk_sndmsg_off += *len;
-	*offset = off;
+	memcpy(page_address(pfrag->page) + pfrag->offset,
+	       page_address(page) + *offset, *len);
+	*offset = pfrag->offset;
+	pfrag->offset += *len;
 
-	return p;
+	return pfrag->page;
 }
 
 static bool spd_can_coalesce(const struct splice_pipe_desc *spd,
@@ -3488,8 +3483,7 @@ bool skb_try_coalesce(struct sk_buff *to, struct sk_buff *from,
 		    skb_shinfo(from)->nr_frags > MAX_SKB_FRAGS)
 			return false;
 
-		delta = from->truesize -
-			SKB_TRUESIZE(skb_end_pointer(from) - from->head);
+		delta = from->truesize - SKB_TRUESIZE(skb_end_offset(from));
 	}
 
 	WARN_ON_ONCE(delta < len);
diff --git a/net/core/sock.c b/net/core/sock.c
index 12cddd0..8a146cf 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1221,7 +1221,7 @@ void sock_update_classid(struct sock *sk)
 	rcu_read_lock();  /* doing current task, which cannot vanish. */
 	classid = task_cls_classid(current);
 	rcu_read_unlock();
-	if (classid && classid != sk->sk_classid)
+	if (classid != sk->sk_classid)
 		sk->sk_classid = classid;
 }
 EXPORT_SYMBOL(sock_update_classid);
@@ -1458,19 +1458,6 @@ void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
 }
 EXPORT_SYMBOL_GPL(sk_setup_caps);
 
-void __init sk_init(void)
-{
-	if (totalram_pages <= 4096) {
-		sysctl_wmem_max = 32767;
-		sysctl_rmem_max = 32767;
-		sysctl_wmem_default = 32767;
-		sysctl_rmem_default = 32767;
-	} else if (totalram_pages >= 131072) {
-		sysctl_wmem_max = 131071;
-		sysctl_rmem_max = 131071;
-	}
-}
-
 /*
  *	Simple resource managers for sockets.
  */
@@ -1738,6 +1725,45 @@ struct sk_buff *sock_alloc_send_skb(struct sock *sk, unsigned long size,
 }
 EXPORT_SYMBOL(sock_alloc_send_skb);
 
+/* On 32bit arches, an skb frag is limited to 2^15 */
+#define SKB_FRAG_PAGE_ORDER	get_order(32768)
+
+bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag)
+{
+	int order;
+
+	if (pfrag->page) {
+		if (atomic_read(&pfrag->page->_count) == 1) {
+			pfrag->offset = 0;
+			return true;
+		}
+		if (pfrag->offset < pfrag->size)
+			return true;
+		put_page(pfrag->page);
+	}
+
+	/* We restrict high order allocations to users that can afford to wait */
+	order = (sk->sk_allocation & __GFP_WAIT) ? SKB_FRAG_PAGE_ORDER : 0;
+
+	do {
+		gfp_t gfp = sk->sk_allocation;
+
+		if (order)
+			gfp |= __GFP_COMP | __GFP_NOWARN;
+		pfrag->page = alloc_pages(gfp, order);
+		if (likely(pfrag->page)) {
+			pfrag->offset = 0;
+			pfrag->size = PAGE_SIZE << order;
+			return true;
+		}
+	} while (--order >= 0);
+
+	sk_enter_memory_pressure(sk);
+	sk_stream_moderate_sndbuf(sk);
+	return false;
+}
+EXPORT_SYMBOL(sk_page_frag_refill);
+
 static void __lock_sock(struct sock *sk)
 	__releases(&sk->sk_lock.slock)
 	__acquires(&sk->sk_lock.slock)
@@ -2167,8 +2193,8 @@ void sock_init_data(struct socket *sock, struct sock *sk)
 	sk->sk_error_report	=	sock_def_error_report;
 	sk->sk_destruct		=	sock_def_destruct;
 
-	sk->sk_sndmsg_page	=	NULL;
-	sk->sk_sndmsg_off	=	0;
+	sk->sk_frag.page	=	NULL;
+	sk->sk_frag.offset	=	0;
 	sk->sk_peek_off		=	-1;
 
 	sk->sk_peer_pid 	=	NULL;
@@ -2411,6 +2437,12 @@ void sk_common_release(struct sock *sk)
 	xfrm_sk_free_policy(sk);
 
 	sk_refcnt_debug_release(sk);
+
+	if (sk->sk_frag.page) {
+		put_page(sk->sk_frag.page);
+		sk->sk_frag.page = NULL;
+	}
+
 	sock_put(sk);
 }
 EXPORT_SYMBOL(sk_common_release);
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index 9d8755e..602cd63 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -172,8 +172,7 @@ static int __net_init diag_net_init(struct net *net)
 		.input	= sock_diag_rcv,
 	};
 
-	net->diag_nlsk = netlink_kernel_create(net, NETLINK_SOCK_DIAG,
-					       THIS_MODULE, &cfg);
+	net->diag_nlsk = netlink_kernel_create(net, NETLINK_SOCK_DIAG, &cfg);
 	return net->diag_nlsk == NULL ? -ENOMEM : 0;
 }
 
diff --git a/net/core/utils.c b/net/core/utils.c
index 39895a6..f5613d5 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -294,6 +294,26 @@ void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
 }
 EXPORT_SYMBOL(inet_proto_csum_replace4);
 
+void inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb,
+			       const __be32 *from, const __be32 *to,
+			       int pseudohdr)
+{
+	__be32 diff[] = {
+		~from[0], ~from[1], ~from[2], ~from[3],
+		to[0], to[1], to[2], to[3],
+	};
+	if (skb->ip_summed != CHECKSUM_PARTIAL) {
+		*sum = csum_fold(csum_partial(diff, sizeof(diff),
+				 ~csum_unfold(*sum)));
+		if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
+			skb->csum = ~csum_partial(diff, sizeof(diff),
+						  ~skb->csum);
+	} else if (pseudohdr)
+		*sum = ~csum_fold(csum_partial(diff, sizeof(diff),
+				  csum_unfold(*sum)));
+}
+EXPORT_SYMBOL(inet_proto_csum_replace16);
+
 int mac_pton(const char *s, u8 *mac)
 {
 	int i;