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

Pull networking updates from David Miller:
 "Here is my initial pull request for the networking subsystem during
  this merge window:

   1) Support for ESN in AH (RFC 4302) from Fan Du.

   2) Add full kernel doc for ethtool command structures, from Ben
      Hutchings.

   3) Add BCM7xxx PHY driver, from Florian Fainelli.

   4) Export computed TCP rate information in netlink socket dumps, from
      Eric Dumazet.

   5) Allow IPSEC SA to be dumped partially using a filter, from Nicolas
      Dichtel.

   6) Convert many drivers to pci_enable_msix_range(), from Alexander
      Gordeev.

   7) Record SKB timestamps more efficiently, from Eric Dumazet.

   8) Switch to microsecond resolution for TCP round trip times, also
      from Eric Dumazet.

   9) Clean up and fix 6lowpan fragmentation handling by making use of
      the existing inet_frag api for it's implementation.

  10) Add TX grant mapping to xen-netback driver, from Zoltan Kiss.

  11) Auto size SKB lengths when composing netlink messages based upon
      past message sizes used, from Eric Dumazet.

  12) qdisc dumps can take a long time, add a cond_resched(), From Eric
      Dumazet.

  13) Sanitize netpoll core and drivers wrt.  SKB handling semantics.
      Get rid of never-used-in-tree netpoll RX handling.  From Eric W
      Biederman.

  14) Support inter-address-family and namespace changing in VTI tunnel
      driver(s).  From Steffen Klassert.

  15) Add Altera TSE driver, from Vince Bridgers.

  16) Optimizing csum_replace2() so that it doesn't adjust the checksum
      by checksumming the entire header, from Eric Dumazet.

  17) Expand BPF internal implementation for faster interpreting, more
      direct translations into JIT'd code, and much cleaner uses of BPF
      filtering in non-socket ocntexts.  From Daniel Borkmann and Alexei
      Starovoitov"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1976 commits)
  netpoll: Use skb_irq_freeable to make zap_completion_queue safe.
  net: Add a test to see if a skb is freeable in irq context
  qlcnic: Fix build failure due to undefined reference to `vxlan_get_rx_port'
  net: ptp: move PTP classifier in its own file
  net: sxgbe: make "core_ops" static
  net: sxgbe: fix logical vs bitwise operation
  net: sxgbe: sxgbe_mdio_register() frees the bus
  Call efx_set_channels() before efx->type->dimension_resources()
  xen-netback: disable rogue vif in kthread context
  net/mlx4: Set proper build dependancy with vxlan
  be2net: fix build dependency on VxLAN
  mac802154: make csma/cca parameters per-wpan
  mac802154: allow only one WPAN to be up at any given time
  net: filter: minor: fix kdoc in __sk_run_filter
  netlink: don't compare the nul-termination in nla_strcmp
  can: c_can: Avoid led toggling for every packet.
  can: c_can: Simplify TX interrupt cleanup
  can: c_can: Store dlc private
  can: c_can: Reduce register access
  can: c_can: Make the code readable
  ...

15 files changed, 1813 insertions, 1177 deletions

diff --git a/net/core/Makefile b/net/core/Makefile
index 9628c20acff6..826b925aa453 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -21,5 +21,6 @@ obj-$(CONFIG_FIB_RULES) += fib_rules.o
 obj-$(CONFIG_TRACEPOINTS) += net-traces.o
 obj-$(CONFIG_NET_DROP_MONITOR) += drop_monitor.o
 obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += timestamping.o
+obj-$(CONFIG_NET_PTP_CLASSIFY) += ptp_classifier.o
 obj-$(CONFIG_CGROUP_NET_PRIO) += netprio_cgroup.o
 obj-$(CONFIG_CGROUP_NET_CLASSID) += netclassid_cgroup.o
diff --git a/net/core/dev.c b/net/core/dev.c
index 4a91591b30a6..757063420ce0 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1245,7 +1245,7 @@ static int __dev_open(struct net_device *dev)
 	 * If we don't do this there is a chance ndo_poll_controller
 	 * or ndo_poll may be running while we open the device
 	 */
-	netpoll_rx_disable(dev);
+	netpoll_poll_disable(dev);
 
 	ret = call_netdevice_notifiers(NETDEV_PRE_UP, dev);
 	ret = notifier_to_errno(ret);
@@ -1260,7 +1260,7 @@ static int __dev_open(struct net_device *dev)
 	if (!ret && ops->ndo_open)
 		ret = ops->ndo_open(dev);
 
-	netpoll_rx_enable(dev);
+	netpoll_poll_enable(dev);
 
 	if (ret)
 		clear_bit(__LINK_STATE_START, &dev->state);
@@ -1313,6 +1313,9 @@ static int __dev_close_many(struct list_head *head)
 	might_sleep();
 
 	list_for_each_entry(dev, head, close_list) {
+		/* Temporarily disable netpoll until the interface is down */
+		netpoll_poll_disable(dev);
+
 		call_netdevice_notifiers(NETDEV_GOING_DOWN, dev);
 
 		clear_bit(__LINK_STATE_START, &dev->state);
@@ -1343,6 +1346,7 @@ static int __dev_close_many(struct list_head *head)
 
 		dev->flags &= ~IFF_UP;
 		net_dmaengine_put();
+		netpoll_poll_enable(dev);
 	}
 
 	return 0;
@@ -1353,14 +1357,10 @@ static int __dev_close(struct net_device *dev)
 	int retval;
 	LIST_HEAD(single);
 
-	/* Temporarily disable netpoll until the interface is down */
-	netpoll_rx_disable(dev);
-
 	list_add(&dev->close_list, &single);
 	retval = __dev_close_many(&single);
 	list_del(&single);
 
-	netpoll_rx_enable(dev);
 	return retval;
 }
 
@@ -1398,14 +1398,9 @@ int dev_close(struct net_device *dev)
 	if (dev->flags & IFF_UP) {
 		LIST_HEAD(single);
 
-		/* Block netpoll rx while the interface is going down */
-		netpoll_rx_disable(dev);
-
 		list_add(&dev->close_list, &single);
 		dev_close_many(&single);
 		list_del(&single);
-
-		netpoll_rx_enable(dev);
 	}
 	return 0;
 }
@@ -1645,8 +1640,7 @@ static inline void net_timestamp_set(struct sk_buff *skb)
 			__net_timestamp(SKB);		\
 	}						\
 
-static inline bool is_skb_forwardable(struct net_device *dev,
-				      struct sk_buff *skb)
+bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb)
 {
 	unsigned int len;
 
@@ -1665,6 +1659,7 @@ static inline bool is_skb_forwardable(struct net_device *dev,
 
 	return false;
 }
+EXPORT_SYMBOL_GPL(is_skb_forwardable);
 
 /**
  * dev_forward_skb - loopback an skb to another netif
@@ -2885,6 +2880,7 @@ recursion_alert:
 	rc = -ENETDOWN;
 	rcu_read_unlock_bh();
 
+	atomic_long_inc(&dev->tx_dropped);
 	kfree_skb(skb);
 	return rc;
 out:
@@ -2957,7 +2953,7 @@ set_rps_cpu(struct net_device *dev, struct sk_buff *skb,
 		flow_table = rcu_dereference(rxqueue->rps_flow_table);
 		if (!flow_table)
 			goto out;
-		flow_id = skb->rxhash & flow_table->mask;
+		flow_id = skb_get_hash(skb) & flow_table->mask;
 		rc = dev->netdev_ops->ndo_rx_flow_steer(dev, skb,
 							rxq_index, flow_id);
 		if (rc < 0)
@@ -2991,6 +2987,7 @@ static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb,
 	struct rps_sock_flow_table *sock_flow_table;
 	int cpu = -1;
 	u16 tcpu;
+	u32 hash;
 
 	if (skb_rx_queue_recorded(skb)) {
 		u16 index = skb_get_rx_queue(skb);
@@ -3019,7 +3016,8 @@ static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb,
 	}
 
 	skb_reset_network_header(skb);
-	if (!skb_get_hash(skb))
+	hash = skb_get_hash(skb);
+	if (!hash)
 		goto done;
 
 	flow_table = rcu_dereference(rxqueue->rps_flow_table);
@@ -3028,11 +3026,10 @@ static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb,
 		u16 next_cpu;
 		struct rps_dev_flow *rflow;
 
-		rflow = &flow_table->flows[skb->rxhash & flow_table->mask];
+		rflow = &flow_table->flows[hash & flow_table->mask];
 		tcpu = rflow->cpu;
 
-		next_cpu = sock_flow_table->ents[skb->rxhash &
-		    sock_flow_table->mask];
+		next_cpu = sock_flow_table->ents[hash & sock_flow_table->mask];
 
 		/*
 		 * If the desired CPU (where last recvmsg was done) is
@@ -3061,7 +3058,7 @@ static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb,
 	}
 
 	if (map) {
-		tcpu = map->cpus[((u64) skb->rxhash * map->len) >> 32];
+		tcpu = map->cpus[((u64) hash * map->len) >> 32];
 
 		if (cpu_online(tcpu)) {
 			cpu = tcpu;
@@ -3236,10 +3233,6 @@ static int netif_rx_internal(struct sk_buff *skb)
 {
 	int ret;
 
-	/* if netpoll wants it, pretend we never saw it */
-	if (netpoll_rx(skb))
-		return NET_RX_DROP;
-
 	net_timestamp_check(netdev_tstamp_prequeue, skb);
 
 	trace_netif_rx(skb);
@@ -3500,11 +3493,11 @@ EXPORT_SYMBOL_GPL(netdev_rx_handler_unregister);
 static bool skb_pfmemalloc_protocol(struct sk_buff *skb)
 {
 	switch (skb->protocol) {
-	case __constant_htons(ETH_P_ARP):
-	case __constant_htons(ETH_P_IP):
-	case __constant_htons(ETH_P_IPV6):
-	case __constant_htons(ETH_P_8021Q):
-	case __constant_htons(ETH_P_8021AD):
+	case htons(ETH_P_ARP):
+	case htons(ETH_P_IP):
+	case htons(ETH_P_IPV6):
+	case htons(ETH_P_8021Q):
+	case htons(ETH_P_8021AD):
 		return true;
 	default:
 		return false;
@@ -3525,10 +3518,6 @@ static int __netif_receive_skb_core(struct sk_buff *skb, bool pfmemalloc)
 
 	trace_netif_receive_skb(skb);
 
-	/* if we've gotten here through NAPI, check netpoll */
-	if (netpoll_receive_skb(skb))
-		goto out;
-
 	orig_dev = skb->dev;
 
 	skb_reset_network_header(skb);
@@ -3655,7 +3644,6 @@ drop:
 
 unlock:
 	rcu_read_unlock();
-out:
 	return ret;
 }
 
@@ -3845,10 +3833,10 @@ static void gro_list_prepare(struct napi_struct *napi, struct sk_buff *skb)
 		diffs |= p->vlan_tci ^ skb->vlan_tci;
 		if (maclen == ETH_HLEN)
 			diffs |= compare_ether_header(skb_mac_header(p),
-						      skb_gro_mac_header(skb));
+						      skb_mac_header(skb));
 		else if (!diffs)
 			diffs = memcmp(skb_mac_header(p),
-				       skb_gro_mac_header(skb),
+				       skb_mac_header(skb),
 				       maclen);
 		NAPI_GRO_CB(p)->same_flow = !diffs;
 	}
@@ -3871,6 +3859,27 @@ static void skb_gro_reset_offset(struct sk_buff *skb)
 	}
 }
 
+static void gro_pull_from_frag0(struct sk_buff *skb, int grow)
+{
+	struct skb_shared_info *pinfo = skb_shinfo(skb);
+
+	BUG_ON(skb->end - skb->tail < grow);
+
+	memcpy(skb_tail_pointer(skb), NAPI_GRO_CB(skb)->frag0, grow);
+
+	skb->data_len -= grow;
+	skb->tail += grow;
+
+	pinfo->frags[0].page_offset += grow;
+	skb_frag_size_sub(&pinfo->frags[0], grow);
+
+	if (unlikely(!skb_frag_size(&pinfo->frags[0]))) {
+		skb_frag_unref(skb, 0);
+		memmove(pinfo->frags, pinfo->frags + 1,
+			--pinfo->nr_frags * sizeof(pinfo->frags[0]));
+	}
+}
+
 static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 {
 	struct sk_buff **pp = NULL;
@@ -3879,14 +3888,14 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
 	struct list_head *head = &offload_base;
 	int same_flow;
 	enum gro_result ret;
+	int grow;
 
-	if (!(skb->dev->features & NETIF_F_GRO) || netpoll_rx_on(skb))
+	if (!(skb->dev->features & NETIF_F_GRO))
 		goto normal;
 
 	if (skb_is_gso(skb) || skb_has_frag_list(skb))
 		goto normal;
 
-	skb_gro_reset_offset(skb);
 	gro_list_prepare(napi, skb);
 	NAPI_GRO_CB(skb)->csum = skb->csum; /* Needed for CHECKSUM_COMPLETE */
 
@@ -3950,27 +3959,9 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
 	ret = GRO_HELD;
 
 pull:
-	if (skb_headlen(skb) < skb_gro_offset(skb)) {
-		int grow = skb_gro_offset(skb) - skb_headlen(skb);
-
-		BUG_ON(skb->end - skb->tail < grow);
-
-		memcpy(skb_tail_pointer(skb), NAPI_GRO_CB(skb)->frag0, grow);
-
-		skb->tail += grow;
-		skb->data_len -= grow;
-
-		skb_shinfo(skb)->frags[0].page_offset += grow;
-		skb_frag_size_sub(&skb_shinfo(skb)->frags[0], grow);
-
-		if (unlikely(!skb_frag_size(&skb_shinfo(skb)->frags[0]))) {
-			skb_frag_unref(skb, 0);
-			memmove(skb_shinfo(skb)->frags,
-				skb_shinfo(skb)->frags + 1,
-				--skb_shinfo(skb)->nr_frags * sizeof(skb_frag_t));
-		}
-	}
-
+	grow = skb_gro_offset(skb) - skb_headlen(skb);
+	if (grow > 0)
+		gro_pull_from_frag0(skb, grow);
 ok:
 	return ret;
 
@@ -4038,6 +4029,8 @@ gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 {
 	trace_napi_gro_receive_entry(skb);
 
+	skb_gro_reset_offset(skb);
+
 	return napi_skb_finish(dev_gro_receive(napi, skb), skb);
 }
 EXPORT_SYMBOL(napi_gro_receive);
@@ -4066,12 +4059,16 @@ struct sk_buff *napi_get_frags(struct napi_struct *napi)
 }
 EXPORT_SYMBOL(napi_get_frags);
 
-static gro_result_t napi_frags_finish(struct napi_struct *napi, struct sk_buff *skb,
-			       gro_result_t ret)
+static gro_result_t napi_frags_finish(struct napi_struct *napi,
+				      struct sk_buff *skb,
+				      gro_result_t ret)
 {
 	switch (ret) {
 	case GRO_NORMAL:
-		if (netif_receive_skb_internal(skb))
+	case GRO_HELD:
+		__skb_push(skb, ETH_HLEN);
+		skb->protocol = eth_type_trans(skb, skb->dev);
+		if (ret == GRO_NORMAL && netif_receive_skb_internal(skb))
 			ret = GRO_DROP;
 		break;
 
@@ -4080,7 +4077,6 @@ static gro_result_t napi_frags_finish(struct napi_struct *napi, struct sk_buff *
 		napi_reuse_skb(napi, skb);
 		break;
 
-	case GRO_HELD:
 	case GRO_MERGED:
 		break;
 	}
@@ -4088,17 +4084,41 @@ static gro_result_t napi_frags_finish(struct napi_struct *napi, struct sk_buff *
 	return ret;
 }
 
+/* Upper GRO stack assumes network header starts at gro_offset=0
+ * Drivers could call both napi_gro_frags() and napi_gro_receive()
+ * We copy ethernet header into skb->data to have a common layout.
+ */
 static struct sk_buff *napi_frags_skb(struct napi_struct *napi)
 {
 	struct sk_buff *skb = napi->skb;
+	const struct ethhdr *eth;
+	unsigned int hlen = sizeof(*eth);
 
 	napi->skb = NULL;
 
-	if (unlikely(!pskb_may_pull(skb, sizeof(struct ethhdr)))) {
-		napi_reuse_skb(napi, skb);
-		return NULL;
+	skb_reset_mac_header(skb);
+	skb_gro_reset_offset(skb);
+
+	eth = skb_gro_header_fast(skb, 0);
+	if (unlikely(skb_gro_header_hard(skb, hlen))) {
+		eth = skb_gro_header_slow(skb, hlen, 0);
+		if (unlikely(!eth)) {
+			napi_reuse_skb(napi, skb);
+			return NULL;
+		}
+	} else {
+		gro_pull_from_frag0(skb, hlen);
+		NAPI_GRO_CB(skb)->frag0 += hlen;
+		NAPI_GRO_CB(skb)->frag0_len -= hlen;
 	}
-	skb->protocol = eth_type_trans(skb, skb->dev);
+	__skb_pull(skb, hlen);
+
+	/*
+	 * This works because the only protocols we care about don't require
+	 * special handling.
+	 * We'll fix it up properly in napi_frags_finish()
+	 */
+	skb->protocol = eth->h_proto;
 
 	return skb;
 }
@@ -6251,6 +6271,7 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
 		netdev_stats_to_stats64(storage, &dev->stats);
 	}
 	storage->rx_dropped += atomic_long_read(&dev->rx_dropped);
+	storage->tx_dropped += atomic_long_read(&dev->tx_dropped);
 	return storage;
 }
 EXPORT_SYMBOL(dev_get_stats);
diff --git a/net/core/filter.c b/net/core/filter.c
index ad30d626a5bd..765556ba32ef 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1,11 +1,16 @@
 /*
  * Linux Socket Filter - Kernel level socket filtering
  *
- * Author:
- *     Jay Schulist <jschlst@samba.org>
+ * Based on the design of the Berkeley Packet Filter. The new
+ * internal format has been designed by PLUMgrid:
  *
- * Based on the design of:
- *     - The Berkeley Packet Filter
+ *	Copyright (c) 2011 - 2014 PLUMgrid, http://plumgrid.com
+ *
+ * Authors:
+ *
+ *	Jay Schulist <jschlst@samba.org>
+ *	Alexei Starovoitov <ast@plumgrid.com>
+ *	Daniel Borkmann <dborkman@redhat.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -108,304 +113,1045 @@ int sk_filter(struct sock *sk, struct sk_buff *skb)
 }
 EXPORT_SYMBOL(sk_filter);
 
+/* Base function for offset calculation. Needs to go into .text section,
+ * therefore keeping it non-static as well; will also be used by JITs
+ * anyway later on, so do not let the compiler omit it.
+ */
+noinline u64 __bpf_call_base(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5)
+{
+	return 0;
+}
+
 /**
- *	sk_run_filter - run a filter on a socket
- *	@skb: buffer to run the filter on
- *	@fentry: filter to apply
+ *	__sk_run_filter - run a filter on a given context
+ *	@ctx: buffer to run the filter on
+ *	@insn: filter to apply
  *
- * Decode and apply filter instructions to the skb->data.
- * Return length to keep, 0 for none. @skb is the data we are
- * filtering, @filter is the array of filter instructions.
- * Because all jumps are guaranteed to be before last instruction,
- * and last instruction guaranteed to be a RET, we dont need to check
- * flen. (We used to pass to this function the length of filter)
+ * Decode and apply filter instructions to the skb->data. Return length to
+ * keep, 0 for none. @ctx is the data we are operating on, @insn is the
+ * array of filter instructions.
  */
-unsigned int sk_run_filter(const struct sk_buff *skb,
-			   const struct sock_filter *fentry)
+unsigned int __sk_run_filter(void *ctx, const struct sock_filter_int *insn)
 {
+	u64 stack[MAX_BPF_STACK / sizeof(u64)];
+	u64 regs[MAX_BPF_REG], tmp;
 	void *ptr;
-	u32 A = 0;			/* Accumulator */
-	u32 X = 0;			/* Index Register */
-	u32 mem[BPF_MEMWORDS];		/* Scratch Memory Store */
-	u32 tmp;
-	int k;
+	int off;
 
-	/*
-	 * Process array of filter instructions.
-	 */
-	for (;; fentry++) {
-#if defined(CONFIG_X86_32)
-#define	K (fentry->k)
-#else
-		const u32 K = fentry->k;
-#endif
-
-		switch (fentry->code) {
-		case BPF_S_ALU_ADD_X:
-			A += X;
-			continue;
-		case BPF_S_ALU_ADD_K:
-			A += K;
-			continue;
-		case BPF_S_ALU_SUB_X:
-			A -= X;
-			continue;
-		case BPF_S_ALU_SUB_K:
-			A -= K;
-			continue;
-		case BPF_S_ALU_MUL_X:
-			A *= X;
-			continue;
-		case BPF_S_ALU_MUL_K:
-			A *= K;
-			continue;
-		case BPF_S_ALU_DIV_X:
-			if (X == 0)
-				return 0;
-			A /= X;
-			continue;
-		case BPF_S_ALU_DIV_K:
-			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;
-		case BPF_S_ALU_AND_K:
-			A &= K;
-			continue;
-		case BPF_S_ALU_OR_X:
-			A |= X;
-			continue;
-		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;
-		case BPF_S_ALU_LSH_K:
-			A <<= K;
-			continue;
-		case BPF_S_ALU_RSH_X:
-			A >>= X;
-			continue;
-		case BPF_S_ALU_RSH_K:
-			A >>= K;
-			continue;
-		case BPF_S_ALU_NEG:
-			A = -A;
-			continue;
-		case BPF_S_JMP_JA:
-			fentry += K;
-			continue;
-		case BPF_S_JMP_JGT_K:
-			fentry += (A > K) ? fentry->jt : fentry->jf;
-			continue;
-		case BPF_S_JMP_JGE_K:
-			fentry += (A >= K) ? fentry->jt : fentry->jf;
-			continue;
-		case BPF_S_JMP_JEQ_K:
-			fentry += (A == K) ? fentry->jt : fentry->jf;
-			continue;
-		case BPF_S_JMP_JSET_K:
-			fentry += (A & K) ? fentry->jt : fentry->jf;
-			continue;
-		case BPF_S_JMP_JGT_X:
-			fentry += (A > X) ? fentry->jt : fentry->jf;
-			continue;
-		case BPF_S_JMP_JGE_X:
-			fentry += (A >= X) ? fentry->jt : fentry->jf;
-			continue;
-		case BPF_S_JMP_JEQ_X:
-			fentry += (A == X) ? fentry->jt : fentry->jf;
-			continue;
-		case BPF_S_JMP_JSET_X:
-			fentry += (A & X) ? fentry->jt : fentry->jf;
-			continue;
-		case BPF_S_LD_W_ABS:
-			k = K;
-load_w:
-			ptr = load_pointer(skb, k, 4, &tmp);
-			if (ptr != NULL) {
-				A = get_unaligned_be32(ptr);
-				continue;
-			}
-			return 0;
-		case BPF_S_LD_H_ABS:
-			k = K;
-load_h:
-			ptr = load_pointer(skb, k, 2, &tmp);
-			if (ptr != NULL) {
-				A = get_unaligned_be16(ptr);
-				continue;
+#define K  insn->imm
+#define A  regs[insn->a_reg]
+#define X  regs[insn->x_reg]
+#define R0 regs[0]
+
+#define CONT	 ({insn++; goto select_insn; })
+#define CONT_JMP ({insn++; goto select_insn; })
+
+	static const void *jumptable[256] = {
+		[0 ... 255] = &&default_label,
+		/* Now overwrite non-defaults ... */
+#define DL(A, B, C)	[A|B|C] = &&A##_##B##_##C
+		DL(BPF_ALU, BPF_ADD, BPF_X),
+		DL(BPF_ALU, BPF_ADD, BPF_K),
+		DL(BPF_ALU, BPF_SUB, BPF_X),
+		DL(BPF_ALU, BPF_SUB, BPF_K),
+		DL(BPF_ALU, BPF_AND, BPF_X),
+		DL(BPF_ALU, BPF_AND, BPF_K),
+		DL(BPF_ALU, BPF_OR, BPF_X),
+		DL(BPF_ALU, BPF_OR, BPF_K),
+		DL(BPF_ALU, BPF_LSH, BPF_X),
+		DL(BPF_ALU, BPF_LSH, BPF_K),
+		DL(BPF_ALU, BPF_RSH, BPF_X),
+		DL(BPF_ALU, BPF_RSH, BPF_K),
+		DL(BPF_ALU, BPF_XOR, BPF_X),
+		DL(BPF_ALU, BPF_XOR, BPF_K),
+		DL(BPF_ALU, BPF_MUL, BPF_X),
+		DL(BPF_ALU, BPF_MUL, BPF_K),
+		DL(BPF_ALU, BPF_MOV, BPF_X),
+		DL(BPF_ALU, BPF_MOV, BPF_K),
+		DL(BPF_ALU, BPF_DIV, BPF_X),
+		DL(BPF_ALU, BPF_DIV, BPF_K),
+		DL(BPF_ALU, BPF_MOD, BPF_X),
+		DL(BPF_ALU, BPF_MOD, BPF_K),
+		DL(BPF_ALU, BPF_NEG, 0),
+		DL(BPF_ALU, BPF_END, BPF_TO_BE),
+		DL(BPF_ALU, BPF_END, BPF_TO_LE),
+		DL(BPF_ALU64, BPF_ADD, BPF_X),
+		DL(BPF_ALU64, BPF_ADD, BPF_K),
+		DL(BPF_ALU64, BPF_SUB, BPF_X),
+		DL(BPF_ALU64, BPF_SUB, BPF_K),
+		DL(BPF_ALU64, BPF_AND, BPF_X),
+		DL(BPF_ALU64, BPF_AND, BPF_K),
+		DL(BPF_ALU64, BPF_OR, BPF_X),
+		DL(BPF_ALU64, BPF_OR, BPF_K),
+		DL(BPF_ALU64, BPF_LSH, BPF_X),
+		DL(BPF_ALU64, BPF_LSH, BPF_K),
+		DL(BPF_ALU64, BPF_RSH, BPF_X),
+		DL(BPF_ALU64, BPF_RSH, BPF_K),
+		DL(BPF_ALU64, BPF_XOR, BPF_X),
+		DL(BPF_ALU64, BPF_XOR, BPF_K),
+		DL(BPF_ALU64, BPF_MUL, BPF_X),
+		DL(BPF_ALU64, BPF_MUL, BPF_K),
+		DL(BPF_ALU64, BPF_MOV, BPF_X),
+		DL(BPF_ALU64, BPF_MOV, BPF_K),
+		DL(BPF_ALU64, BPF_ARSH, BPF_X),
+		DL(BPF_ALU64, BPF_ARSH, BPF_K),
+		DL(BPF_ALU64, BPF_DIV, BPF_X),
+		DL(BPF_ALU64, BPF_DIV, BPF_K),
+		DL(BPF_ALU64, BPF_MOD, BPF_X),
+		DL(BPF_ALU64, BPF_MOD, BPF_K),
+		DL(BPF_ALU64, BPF_NEG, 0),
+		DL(BPF_JMP, BPF_CALL, 0),
+		DL(BPF_JMP, BPF_JA, 0),
+		DL(BPF_JMP, BPF_JEQ, BPF_X),
+		DL(BPF_JMP, BPF_JEQ, BPF_K),
+		DL(BPF_JMP, BPF_JNE, BPF_X),
+		DL(BPF_JMP, BPF_JNE, BPF_K),
+		DL(BPF_JMP, BPF_JGT, BPF_X),
+		DL(BPF_JMP, BPF_JGT, BPF_K),
+		DL(BPF_JMP, BPF_JGE, BPF_X),
+		DL(BPF_JMP, BPF_JGE, BPF_K),
+		DL(BPF_JMP, BPF_JSGT, BPF_X),
+		DL(BPF_JMP, BPF_JSGT, BPF_K),
+		DL(BPF_JMP, BPF_JSGE, BPF_X),
+		DL(BPF_JMP, BPF_JSGE, BPF_K),
+		DL(BPF_JMP, BPF_JSET, BPF_X),
+		DL(BPF_JMP, BPF_JSET, BPF_K),
+		DL(BPF_JMP, BPF_EXIT, 0),
+		DL(BPF_STX, BPF_MEM, BPF_B),
+		DL(BPF_STX, BPF_MEM, BPF_H),
+		DL(BPF_STX, BPF_MEM, BPF_W),
+		DL(BPF_STX, BPF_MEM, BPF_DW),
+		DL(BPF_STX, BPF_XADD, BPF_W),
+		DL(BPF_STX, BPF_XADD, BPF_DW),
+		DL(BPF_ST, BPF_MEM, BPF_B),
+		DL(BPF_ST, BPF_MEM, BPF_H),
+		DL(BPF_ST, BPF_MEM, BPF_W),
+		DL(BPF_ST, BPF_MEM, BPF_DW),
+		DL(BPF_LDX, BPF_MEM, BPF_B),
+		DL(BPF_LDX, BPF_MEM, BPF_H),
+		DL(BPF_LDX, BPF_MEM, BPF_W),
+		DL(BPF_LDX, BPF_MEM, BPF_DW),
+		DL(BPF_LD, BPF_ABS, BPF_W),
+		DL(BPF_LD, BPF_ABS, BPF_H),
+		DL(BPF_LD, BPF_ABS, BPF_B),
+		DL(BPF_LD, BPF_IND, BPF_W),
+		DL(BPF_LD, BPF_IND, BPF_H),
+		DL(BPF_LD, BPF_IND, BPF_B),
+#undef DL
+	};
+
+	regs[FP_REG]  = (u64) (unsigned long) &stack[ARRAY_SIZE(stack)];
+	regs[ARG1_REG] = (u64) (unsigned long) ctx;
+
+select_insn:
+	goto *jumptable[insn->code];
+
+	/* ALU */
+#define ALU(OPCODE, OP)			\
+	BPF_ALU64_##OPCODE##_BPF_X:	\
+		A = A OP X;		\
+		CONT;			\
+	BPF_ALU_##OPCODE##_BPF_X:	\
+		A = (u32) A OP (u32) X;	\
+		CONT;			\
+	BPF_ALU64_##OPCODE##_BPF_K:	\
+		A = A OP K;		\
+		CONT;			\
+	BPF_ALU_##OPCODE##_BPF_K:	\
+		A = (u32) A OP (u32) K;	\
+		CONT;
+
+	ALU(BPF_ADD,  +)
+	ALU(BPF_SUB,  -)
+	ALU(BPF_AND,  &)
+	ALU(BPF_OR,   |)
+	ALU(BPF_LSH, <<)
+	ALU(BPF_RSH, >>)
+	ALU(BPF_XOR,  ^)
+	ALU(BPF_MUL,  *)
+#undef ALU
+	BPF_ALU_BPF_NEG_0:
+		A = (u32) -A;
+		CONT;
+	BPF_ALU64_BPF_NEG_0:
+		A = -A;
+		CONT;
+	BPF_ALU_BPF_MOV_BPF_X:
+		A = (u32) X;
+		CONT;
+	BPF_ALU_BPF_MOV_BPF_K:
+		A = (u32) K;
+		CONT;
+	BPF_ALU64_BPF_MOV_BPF_X:
+		A = X;
+		CONT;
+	BPF_ALU64_BPF_MOV_BPF_K:
+		A = K;
+		CONT;
+	BPF_ALU64_BPF_ARSH_BPF_X:
+		(*(s64 *) &A) >>= X;
+		CONT;
+	BPF_ALU64_BPF_ARSH_BPF_K:
+		(*(s64 *) &A) >>= K;
+		CONT;
+	BPF_ALU64_BPF_MOD_BPF_X:
+		tmp = A;
+		if (X)
+			A = do_div(tmp, X);
+		CONT;
+	BPF_ALU_BPF_MOD_BPF_X:
+		tmp = (u32) A;
+		if (X)
+			A = do_div(tmp, (u32) X);
+		CONT;
+	BPF_ALU64_BPF_MOD_BPF_K:
+		tmp = A;
+		if (K)
+			A = do_div(tmp, K);
+		CONT;
+	BPF_ALU_BPF_MOD_BPF_K:
+		tmp = (u32) A;
+		if (K)
+			A = do_div(tmp, (u32) K);
+		CONT;
+	BPF_ALU64_BPF_DIV_BPF_X:
+		if (X)
+			do_div(A, X);
+		CONT;
+	BPF_ALU_BPF_DIV_BPF_X:
+		tmp = (u32) A;
+		if (X)
+			do_div(tmp, (u32) X);
+		A = (u32) tmp;
+		CONT;
+	BPF_ALU64_BPF_DIV_BPF_K:
+		if (K)
+			do_div(A, K);
+		CONT;
+	BPF_ALU_BPF_DIV_BPF_K:
+		tmp = (u32) A;
+		if (K)
+			do_div(tmp, (u32) K);
+		A = (u32) tmp;
+		CONT;
+	BPF_ALU_BPF_END_BPF_TO_BE:
+		switch (K) {
+		case 16:
+			A = (__force u16) cpu_to_be16(A);
+			break;
+		case 32:
+			A = (__force u32) cpu_to_be32(A);
+			break;
+		case 64:
+			A = (__force u64) cpu_to_be64(A);
+			break;
+		}
+		CONT;
+	BPF_ALU_BPF_END_BPF_TO_LE:
+		switch (K) {
+		case 16:
+			A = (__force u16) cpu_to_le16(A);
+			break;
+		case 32:
+			A = (__force u32) cpu_to_le32(A);
+			break;
+		case 64:
+			A = (__force u64) cpu_to_le64(A);
+			break;
+		}
+		CONT;
+
+	/* CALL */
+	BPF_JMP_BPF_CALL_0:
+		/* Function call scratches R1-R5 registers, preserves R6-R9,
+		 * and stores return value into R0.
+		 */
+		R0 = (__bpf_call_base + insn->imm)(regs[1], regs[2], regs[3],
+						   regs[4], regs[5]);
+		CONT;
+
+	/* JMP */
+	BPF_JMP_BPF_JA_0:
+		insn += insn->off;
+		CONT;
+	BPF_JMP_BPF_JEQ_BPF_X:
+		if (A == X) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JEQ_BPF_K:
+		if (A == K) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JNE_BPF_X:
+		if (A != X) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JNE_BPF_K:
+		if (A != K) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JGT_BPF_X:
+		if (A > X) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JGT_BPF_K:
+		if (A > K) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JGE_BPF_X:
+		if (A >= X) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JGE_BPF_K:
+		if (A >= K) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JSGT_BPF_X:
+		if (((s64)A) > ((s64)X)) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JSGT_BPF_K:
+		if (((s64)A) > ((s64)K)) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JSGE_BPF_X:
+		if (((s64)A) >= ((s64)X)) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JSGE_BPF_K:
+		if (((s64)A) >= ((s64)K)) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JSET_BPF_X:
+		if (A & X) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_JSET_BPF_K:
+		if (A & K) {
+			insn += insn->off;
+			CONT_JMP;
+		}
+		CONT;
+	BPF_JMP_BPF_EXIT_0:
+		return R0;
+
+	/* STX and ST and LDX*/
+#define LDST(SIZEOP, SIZE)					\
+	BPF_STX_BPF_MEM_##SIZEOP:				\
+		*(SIZE *)(unsigned long) (A + insn->off) = X;	\
+		CONT;						\
+	BPF_ST_BPF_MEM_##SIZEOP:				\
+		*(SIZE *)(unsigned long) (A + insn->off) = K;	\
+		CONT;						\
+	BPF_LDX_BPF_MEM_##SIZEOP:				\
+		A = *(SIZE *)(unsigned long) (X + insn->off);	\
+		CONT;
+
+	LDST(BPF_B,   u8)
+	LDST(BPF_H,  u16)
+	LDST(BPF_W,  u32)
+	LDST(BPF_DW, u64)
+#undef LDST
+	BPF_STX_BPF_XADD_BPF_W: /* lock xadd *(u32 *)(A + insn->off) += X */
+		atomic_add((u32) X, (atomic_t *)(unsigned long)
+			   (A + insn->off));
+		CONT;
+	BPF_STX_BPF_XADD_BPF_DW: /* lock xadd *(u64 *)(A + insn->off) += X */
+		atomic64_add((u64) X, (atomic64_t *)(unsigned long)
+			     (A + insn->off));
+		CONT;
+	BPF_LD_BPF_ABS_BPF_W: /* R0 = ntohl(*(u32 *) (skb->data + K)) */
+		off = K;
+load_word:
+		/* BPF_LD + BPD_ABS and BPF_LD + BPF_IND insns are only
+		 * appearing in the programs where ctx == skb. All programs
+		 * keep 'ctx' in regs[CTX_REG] == R6, sk_convert_filter()
+		 * saves it in R6, internal BPF verifier will check that
+		 * R6 == ctx.
+		 *
+		 * BPF_ABS and BPF_IND are wrappers of function calls, so
+		 * they scratch R1-R5 registers, preserve R6-R9, and store
+		 * return value into R0.
+		 *
+		 * Implicit input:
+		 *   ctx
+		 *
+		 * Explicit input:
+		 *   X == any register
+		 *   K == 32-bit immediate
+		 *
+		 * Output:
+		 *   R0 - 8/16/32-bit skb data converted to cpu endianness
+		 */
+		ptr = load_pointer((struct sk_buff *) ctx, off, 4, &tmp);
+		if (likely(ptr != NULL)) {
+			R0 = get_unaligned_be32(ptr);
+			CONT;
+		}
+		return 0;
+	BPF_LD_BPF_ABS_BPF_H: /* R0 = ntohs(*(u16 *) (skb->data + K)) */
+		off = K;
+load_half:
+		ptr = load_pointer((struct sk_buff *) ctx, off, 2, &tmp);
+		if (likely(ptr != NULL)) {
+			R0 = get_unaligned_be16(ptr);
+			CONT;
+		}
+		return 0;
+	BPF_LD_BPF_ABS_BPF_B: /* R0 = *(u8 *) (ctx + K) */
+		off = K;
+load_byte:
+		ptr = load_pointer((struct sk_buff *) ctx, off, 1, &tmp);
+		if (likely(ptr != NULL)) {
+			R0 = *(u8 *)ptr;
+			CONT;
+		}
+		return 0;
+	BPF_LD_BPF_IND_BPF_W: /* R0 = ntohl(*(u32 *) (skb->data + X + K)) */
+		off = K + X;
+		goto load_word;
+	BPF_LD_BPF_IND_BPF_H: /* R0 = ntohs(*(u16 *) (skb->data + X + K)) */
+		off = K + X;
+		goto load_half;
+	BPF_LD_BPF_IND_BPF_B: /* R0 = *(u8 *) (skb->data + X + K) */
+		off = K + X;
+		goto load_byte;
+
+	default_label:
+		/* If we ever reach this, we have a bug somewhere. */
+		WARN_RATELIMIT(1, "unknown opcode %02x\n", insn->code);
+		return 0;
+#undef CONT_JMP
+#undef CONT
+
+#undef R0
+#undef X
+#undef A
+#undef K
+}
+
+u32 sk_run_filter_int_seccomp(const struct seccomp_data *ctx,
+			      const struct sock_filter_int *insni)
+    __attribute__ ((alias ("__sk_run_filter")));
+
+u32 sk_run_filter_int_skb(const struct sk_buff *ctx,
+			  const struct sock_filter_int *insni)
+    __attribute__ ((alias ("__sk_run_filter")));
+EXPORT_SYMBOL_GPL(sk_run_filter_int_skb);
+
+/* Helper to find the offset of pkt_type in sk_buff structure. We want
+ * to make sure its still a 3bit field starting at a byte boundary;
+ * taken from arch/x86/net/bpf_jit_comp.c.
+ */
+#define PKT_TYPE_MAX	7
+static unsigned int pkt_type_offset(void)
+{
+	struct sk_buff skb_probe = { .pkt_type = ~0, };
+	u8 *ct = (u8 *) &skb_probe;
+	unsigned int off;
+
+	for (off = 0; off < sizeof(struct sk_buff); off++) {
+		if (ct[off] == PKT_TYPE_MAX)
+			return off;
+	}
+
+	pr_err_once("Please fix %s, as pkt_type couldn't be found!\n", __func__);
+	return -1;
+}
+
+static u64 __skb_get_pay_offset(u64 ctx, u64 A, u64 X, u64 r4, u64 r5)
+{
+	struct sk_buff *skb = (struct sk_buff *)(long) ctx;
+
+	return __skb_get_poff(skb);
+}
+
+static u64 __skb_get_nlattr(u64 ctx, u64 A, u64 X, u64 r4, u64 r5)
+{
+	struct sk_buff *skb = (struct sk_buff *)(long) ctx;
+	struct nlattr *nla;
+
+	if (skb_is_nonlinear(skb))
+		return 0;
+
+	if (A > skb->len - sizeof(struct nlattr))
+		return 0;
+
+	nla = nla_find((struct nlattr *) &skb->data[A], skb->len - A, X);
+	if (nla)
+		return (void *) nla - (void *) skb->data;
+
+	return 0;
+}
+
+static u64 __skb_get_nlattr_nest(u64 ctx, u64 A, u64 X, u64 r4, u64 r5)
+{
+	struct sk_buff *skb = (struct sk_buff *)(long) ctx;
+	struct nlattr *nla;
+
+	if (skb_is_nonlinear(skb))
+		return 0;
+
+	if (A > skb->len - sizeof(struct nlattr))
+		return 0;
+
+	nla = (struct nlattr *) &skb->data[A];
+	if (nla->nla_len > A - skb->len)
+		return 0;
+
+	nla = nla_find_nested(nla, X);
+	if (nla)
+		return (void *) nla - (void *) skb->data;
+
+	return 0;
+}
+
+static u64 __get_raw_cpu_id(u64 ctx, u64 A, u64 X, u64 r4, u64 r5)
+{
+	return raw_smp_processor_id();
+}
+
+/* Register mappings for user programs. */
+#define A_REG		0
+#define X_REG		7
+#define TMP_REG		8
+#define ARG2_REG	2
+#define ARG3_REG	3
+
+static bool convert_bpf_extensions(struct sock_filter *fp,
+				   struct sock_filter_int **insnp)
+{
+	struct sock_filter_int *insn = *insnp;
+
+	switch (fp->k) {
+	case SKF_AD_OFF + SKF_AD_PROTOCOL:
+		BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, protocol) != 2);
+
+		insn->code = BPF_LDX | BPF_MEM | BPF_H;
+		insn->a_reg = A_REG;
+		insn->x_reg = CTX_REG;
+		insn->off = offsetof(struct sk_buff, protocol);
+		insn++;
+
+		/* A = ntohs(A) [emitting a nop or swap16] */
+		insn->code = BPF_ALU | BPF_END | BPF_FROM_BE;
+		insn->a_reg = A_REG;
+		insn->imm = 16;
+		break;
+
+	case SKF_AD_OFF + SKF_AD_PKTTYPE:
+		insn->code = BPF_LDX | BPF_MEM | BPF_B;
+		insn->a_reg = A_REG;
+		insn->x_reg = CTX_REG;
+		insn->off = pkt_type_offset();
+		if (insn->off < 0)
+			return false;
+		insn++;
+
+		insn->code = BPF_ALU | BPF_AND | BPF_K;
+		insn->a_reg = A_REG;
+		insn->imm = PKT_TYPE_MAX;
+		break;
+
+	case SKF_AD_OFF + SKF_AD_IFINDEX:
+	case SKF_AD_OFF + SKF_AD_HATYPE:
+		if (FIELD_SIZEOF(struct sk_buff, dev) == 8)
+			insn->code = BPF_LDX | BPF_MEM | BPF_DW;
+		else
+			insn->code = BPF_LDX | BPF_MEM | BPF_W;
+		insn->a_reg = TMP_REG;
+		insn->x_reg = CTX_REG;
+		insn->off = offsetof(struct sk_buff, dev);
+		insn++;
+
+		insn->code = BPF_JMP | BPF_JNE | BPF_K;
+		insn->a_reg = TMP_REG;
+		insn->imm = 0;
+		insn->off = 1;
+		insn++;
+
+		insn->code = BPF_JMP | BPF_EXIT;
+		insn++;
+
+		BUILD_BUG_ON(FIELD_SIZEOF(struct net_device, ifindex) != 4);
+		BUILD_BUG_ON(FIELD_SIZEOF(struct net_device, type) != 2);
+
+		insn->a_reg = A_REG;
+		insn->x_reg = TMP_REG;
+
+		if (fp->k == SKF_AD_OFF + SKF_AD_IFINDEX) {
+			insn->code = BPF_LDX | BPF_MEM | BPF_W;
+			insn->off = offsetof(struct net_device, ifindex);
+		} else {
+			insn->code = BPF_LDX | BPF_MEM | BPF_H;
+			insn->off = offsetof(struct net_device, type);
+		}
+		break;
+
+	case SKF_AD_OFF + SKF_AD_MARK:
+		BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, mark) != 4);
+
+		insn->code = BPF_LDX | BPF_MEM | BPF_W;
+		insn->a_reg = A_REG;
+		insn->x_reg = CTX_REG;
+		insn->off = offsetof(struct sk_buff, mark);
+		break;
+
+	case SKF_AD_OFF + SKF_AD_RXHASH:
+		BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, hash) != 4);
+
+		insn->code = BPF_LDX | BPF_MEM | BPF_W;
+		insn->a_reg = A_REG;
+		insn->x_reg = CTX_REG;
+		insn->off = offsetof(struct sk_buff, hash);
+		break;
+
+	case SKF_AD_OFF + SKF_AD_QUEUE:
+		BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, queue_mapping) != 2);
+
+		insn->code = BPF_LDX | BPF_MEM | BPF_H;
+		insn->a_reg = A_REG;
+		insn->x_reg = CTX_REG;
+		insn->off = offsetof(struct sk_buff, queue_mapping);
+		break;
+
+	case SKF_AD_OFF + SKF_AD_VLAN_TAG:
+	case SKF_AD_OFF + SKF_AD_VLAN_TAG_PRESENT:
+		BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, vlan_tci) != 2);
+
+		insn->code = BPF_LDX | BPF_MEM | BPF_H;
+		insn->a_reg = A_REG;
+		insn->x_reg = CTX_REG;
+		insn->off = offsetof(struct sk_buff, vlan_tci);
+		insn++;
+
+		BUILD_BUG_ON(VLAN_TAG_PRESENT != 0x1000);
+
+		if (fp->k == SKF_AD_OFF + SKF_AD_VLAN_TAG) {
+			insn->code = BPF_ALU | BPF_AND | BPF_K;
+			insn->a_reg = A_REG;
+			insn->imm = ~VLAN_TAG_PRESENT;
+		} else {
+			insn->code = BPF_ALU | BPF_RSH | BPF_K;
+			insn->a_reg = A_REG;
+			insn->imm = 12;
+			insn++;
+
+			insn->code = BPF_ALU | BPF_AND | BPF_K;
+			insn->a_reg = A_REG;
+			insn->imm = 1;
+		}
+		break;
+
+	case SKF_AD_OFF + SKF_AD_PAY_OFFSET:
+	case SKF_AD_OFF + SKF_AD_NLATTR:
+	case SKF_AD_OFF + SKF_AD_NLATTR_NEST:
+	case SKF_AD_OFF + SKF_AD_CPU:
+		/* arg1 = ctx */
+		insn->code = BPF_ALU64 | BPF_MOV | BPF_X;
+		insn->a_reg = ARG1_REG;
+		insn->x_reg = CTX_REG;
+		insn++;
+
+		/* arg2 = A */
+		insn->code = BPF_ALU64 | BPF_MOV | BPF_X;
+		insn->a_reg = ARG2_REG;
+		insn->x_reg = A_REG;
+		insn++;
+
+		/* arg3 = X */
+		insn->code = BPF_ALU64 | BPF_MOV | BPF_X;
+		insn->a_reg = ARG3_REG;
+		insn->x_reg = X_REG;
+		insn++;
+
+		/* Emit call(ctx, arg2=A, arg3=X) */
+		insn->code = BPF_JMP | BPF_CALL;
+		switch (fp->k) {
+		case SKF_AD_OFF + SKF_AD_PAY_OFFSET:
+			insn->imm = __skb_get_pay_offset - __bpf_call_base;
+			break;
+		case SKF_AD_OFF + SKF_AD_NLATTR:
+			insn->imm = __skb_get_nlattr - __bpf_call_base;
+			break;
+		case SKF_AD_OFF + SKF_AD_NLATTR_NEST:
+			insn->imm = __skb_get_nlattr_nest - __bpf_call_base;
+			break;
+		case SKF_AD_OFF + SKF_AD_CPU:
+			insn->imm = __get_raw_cpu_id - __bpf_call_base;
+			break;
+		}
+		break;
+
+	case SKF_AD_OFF + SKF_AD_ALU_XOR_X:
+		insn->code = BPF_ALU | BPF_XOR | BPF_X;
+		insn->a_reg = A_REG;
+		insn->x_reg = X_REG;
+		break;
+
+	default:
+		/* This is just a dummy call to avoid letting the compiler
+		 * evict __bpf_call_base() as an optimization. Placed here
+		 * where no-one bothers.
+		 */
+		BUG_ON(__bpf_call_base(0, 0, 0, 0, 0) != 0);
+		return false;
+	}
+
+	*insnp = insn;
+	return true;
+}
+
+/**
+ *	sk_convert_filter - convert filter program
+ *	@prog: the user passed filter program
+ *	@len: the length of the user passed filter program
+ *	@new_prog: buffer where converted program will be stored
+ *	@new_len: pointer to store length of converted program
+ *
+ * Remap 'sock_filter' style BPF instruction set to 'sock_filter_ext' style.
+ * Conversion workflow:
+ *
+ * 1) First pass for calculating the new program length:
+ *   sk_convert_filter(old_prog, old_len, NULL, &new_len)
+ *
+ * 2) 2nd pass to remap in two passes: 1st pass finds new
+ *    jump offsets, 2nd pass remapping:
+ *   new_prog = kmalloc(sizeof(struct sock_filter_int) * new_len);
+ *   sk_convert_filter(old_prog, old_len, new_prog, &new_len);
+ *
+ * User BPF's register A is mapped to our BPF register 6, user BPF
+ * register X is mapped to BPF register 7; frame pointer is always
+ * register 10; Context 'void *ctx' is stored in register 1, that is,
+ * for socket filters: ctx == 'struct sk_buff *', for seccomp:
+ * ctx == 'struct seccomp_data *'.
+ */
+int sk_convert_filter(struct sock_filter *prog, int len,
+		      struct sock_filter_int *new_prog, int *new_len)
+{
+	int new_flen = 0, pass = 0, target, i;
+	struct sock_filter_int *new_insn;
+	struct sock_filter *fp;
+	int *addrs = NULL;
+	u8 bpf_src;
+
+	BUILD_BUG_ON(BPF_MEMWORDS * sizeof(u32) > MAX_BPF_STACK);
+	BUILD_BUG_ON(FP_REG + 1 != MAX_BPF_REG);
+
+	if (len <= 0 || len >= BPF_MAXINSNS)
+		return -EINVAL;
+
+	if (new_prog) {
+		addrs = kzalloc(len * sizeof(*addrs), GFP_KERNEL);
+		if (!addrs)
+			return -ENOMEM;
+	}
+
+do_pass:
+	new_insn = new_prog;
+	fp = prog;
+
+	if (new_insn) {
+		new_insn->code = BPF_ALU64 | BPF_MOV | BPF_X;
+		new_insn->a_reg = CTX_REG;
+		new_insn->x_reg = ARG1_REG;
+	}
+	new_insn++;
+
+	for (i = 0; i < len; fp++, i++) {
+		struct sock_filter_int tmp_insns[6] = { };
+		struct sock_filter_int *insn = tmp_insns;
+
+		if (addrs)
+			addrs[i] = new_insn - new_prog;
+
+		switch (fp->code) {
+		/* All arithmetic insns and skb loads map as-is. */
+		case BPF_ALU | BPF_ADD | BPF_X:
+		case BPF_ALU | BPF_ADD | BPF_K:
+		case BPF_ALU | BPF_SUB | BPF_X:
+		case BPF_ALU | BPF_SUB | BPF_K:
+		case BPF_ALU | BPF_AND | BPF_X:
+		case BPF_ALU | BPF_AND | BPF_K:
+		case BPF_ALU | BPF_OR | BPF_X:
+		case BPF_ALU | BPF_OR | BPF_K:
+		case BPF_ALU | BPF_LSH | BPF_X:
+		case BPF_ALU | BPF_LSH | BPF_K:
+		case BPF_ALU | BPF_RSH | BPF_X:
+		case BPF_ALU | BPF_RSH | BPF_K:
+		case BPF_ALU | BPF_XOR | BPF_X:
+		case BPF_ALU | BPF_XOR | BPF_K:
+		case BPF_ALU | BPF_MUL | BPF_X:
+		case BPF_ALU | BPF_MUL | BPF_K:
+		case BPF_ALU | BPF_DIV | BPF_X:
+		case BPF_ALU | BPF_DIV | BPF_K:
+		case BPF_ALU | BPF_MOD | BPF_X:
+		case BPF_ALU | BPF_MOD | BPF_K:
+		case BPF_ALU | BPF_NEG:
+		case BPF_LD | BPF_ABS | BPF_W:
+		case BPF_LD | BPF_ABS | BPF_H:
+		case BPF_LD | BPF_ABS | BPF_B:
+		case BPF_LD | BPF_IND | BPF_W:
+		case BPF_LD | BPF_IND | BPF_H:
+		case BPF_LD | BPF_IND | BPF_B:
+			/* Check for overloaded BPF extension and
+			 * directly convert it if found, otherwise
+			 * just move on with mapping.
+			 */
+			if (BPF_CLASS(fp->code) == BPF_LD &&
+			    BPF_MODE(fp->code) == BPF_ABS &&
+			    convert_bpf_extensions(fp, &insn))
+				break;
+
+			insn->code = fp->code;
+			insn->a_reg = A_REG;
+			insn->x_reg = X_REG;
+			insn->imm = fp->k;
+			break;
+
+		/* Jump opcodes map as-is, but offsets need adjustment. */
+		case BPF_JMP | BPF_JA:
+			target = i + fp->k + 1;
+			insn->code = fp->code;
+#define EMIT_JMP							\
+	do {								\
+		if (target >= len || target < 0)			\
+			goto err;					\
+		insn->off = addrs ? addrs[target] - addrs[i] - 1 : 0;	\
+		/* Adjust pc relative offset for 2nd or 3rd insn. */	\
+		insn->off -= insn - tmp_insns;				\
+	} while (0)
+
+			EMIT_JMP;
+			break;
+
+		case BPF_JMP | BPF_JEQ | BPF_K:
+		case BPF_JMP | BPF_JEQ | BPF_X:
+		case BPF_JMP | BPF_JSET | BPF_K:
+		case BPF_JMP | BPF_JSET | BPF_X:
+		case BPF_JMP | BPF_JGT | BPF_K:
+		case BPF_JMP | BPF_JGT | BPF_X:
+		case BPF_JMP | BPF_JGE | BPF_K:
+		case BPF_JMP | BPF_JGE | BPF_X:
+			if (BPF_SRC(fp->code) == BPF_K && (int) fp->k < 0) {
+				/* BPF immediates are signed, zero extend
+				 * immediate into tmp register and use it
+				 * in compare insn.
+				 */
+				insn->code = BPF_ALU | BPF_MOV | BPF_K;
+				insn->a_reg = TMP_REG;
+				insn->imm = fp->k;
+				insn++;
+
+				insn->a_reg = A_REG;
+				insn->x_reg = TMP_REG;
+				bpf_src = BPF_X;
+			} else {
+				insn->a_reg = A_REG;
+				insn->x_reg = X_REG;
+				insn->imm = fp->k;
+				bpf_src = BPF_SRC(fp->code);
 			}
-			return 0;
-		case BPF_S_LD_B_ABS:
-			k = K;
-load_b:
-			ptr = load_pointer(skb, k, 1, &tmp);
-			if (ptr != NULL) {
-				A = *(u8 *)ptr;
-				continue;
+
+			/* Common case where 'jump_false' is next insn. */
+			if (fp->jf == 0) {
+				insn->code = BPF_JMP | BPF_OP(fp->code) | bpf_src;
+				target = i + fp->jt + 1;
+				EMIT_JMP;
+				break;
 			}
-			return 0;
-		case BPF_S_LD_W_LEN:
-			A = skb->len;
-			continue;
-		case BPF_S_LDX_W_LEN:
-			X = skb->len;
-			continue;
-		case BPF_S_LD_W_IND:
-			k = X + K;
-			goto load_w;
-		case BPF_S_LD_H_IND:
-			k = X + K;
-			goto load_h;
-		case BPF_S_LD_B_IND:
-			k = X + K;
-			goto load_b;
-		case BPF_S_LDX_B_MSH:
-			ptr = load_pointer(skb, K, 1, &tmp);
-			if (ptr != NULL) {
-				X = (*(u8 *)ptr & 0xf) << 2;
-				continue;
+
+			/* Convert JEQ into JNE when 'jump_true' is next insn. */
+			if (fp->jt == 0 && BPF_OP(fp->code) == BPF_JEQ) {
+				insn->code = BPF_JMP | BPF_JNE | bpf_src;
+				target = i + fp->jf + 1;
+				EMIT_JMP;
+				break;
 			}
-			return 0;
-		case BPF_S_LD_IMM:
-			A = K;
-			continue;
-		case BPF_S_LDX_IMM:
-			X = K;
-			continue;
-		case BPF_S_LD_MEM:
-			A = mem[K];
-			continue;
-		case BPF_S_LDX_MEM:
-			X = mem[K];
-			continue;
-		case BPF_S_MISC_TAX:
-			X = A;
-			continue;
-		case BPF_S_MISC_TXA:
-			A = X;
-			continue;
-		case BPF_S_RET_K:
-			return K;
-		case BPF_S_RET_A:
-			return A;
-		case BPF_S_ST:
-			mem[K] = A;
-			continue;
-		case BPF_S_STX:
-			mem[K] = X;
-			continue;
-		case BPF_S_ANC_PROTOCOL:
-			A = ntohs(skb->protocol);
-			continue;
-		case BPF_S_ANC_PKTTYPE:
-			A = skb->pkt_type;
-			continue;
-		case BPF_S_ANC_IFINDEX:
-			if (!skb->dev)
-				return 0;
-			A = skb->dev->ifindex;
-			continue;
-		case BPF_S_ANC_MARK:
-			A = skb->mark;
-			continue;
-		case BPF_S_ANC_QUEUE:
-			A = skb->queue_mapping;
-			continue;
-		case BPF_S_ANC_HATYPE:
-			if (!skb->dev)
-				return 0;
-			A = skb->dev->type;
-			continue;
-		case BPF_S_ANC_RXHASH:
-			A = skb->rxhash;
-			continue;
-		case BPF_S_ANC_CPU:
-			A = raw_smp_processor_id();
-			continue;
-		case BPF_S_ANC_VLAN_TAG:
-			A = vlan_tx_tag_get(skb);
-			continue;
-		case BPF_S_ANC_VLAN_TAG_PRESENT:
-			A = !!vlan_tx_tag_present(skb);
-			continue;
-		case BPF_S_ANC_PAY_OFFSET:
-			A = __skb_get_poff(skb);
-			continue;
-		case BPF_S_ANC_NLATTR: {
-			struct nlattr *nla;
-
-			if (skb_is_nonlinear(skb))
-				return 0;
-			if (A > skb->len - sizeof(struct nlattr))
-				return 0;
-
-			nla = nla_find((struct nlattr *)&skb->data[A],
-				       skb->len - A, X);
-			if (nla)
-				A = (void *)nla - (void *)skb->data;
-			else
-				A = 0;
-			continue;
-		}
-		case BPF_S_ANC_NLATTR_NEST: {
-			struct nlattr *nla;
-
-			if (skb_is_nonlinear(skb))
-				return 0;
-			if (A > skb->len - sizeof(struct nlattr))
-				return 0;
-
-			nla = (struct nlattr *)&skb->data[A];
-			if (nla->nla_len > A - skb->len)
-				return 0;
-
-			nla = nla_find_nested(nla, X);
-			if (nla)
-				A = (void *)nla - (void *)skb->data;
-			else
-				A = 0;
-			continue;
-		}
-#ifdef CONFIG_SECCOMP_FILTER
-		case BPF_S_ANC_SECCOMP_LD_W:
-			A = seccomp_bpf_load(fentry->k);
-			continue;
-#endif
+
+			/* Other jumps are mapped into two insns: Jxx and JA. */
+			target = i + fp->jt + 1;
+			insn->code = BPF_JMP | BPF_OP(fp->code) | bpf_src;
+			EMIT_JMP;
+			insn++;
+
+			insn->code = BPF_JMP | BPF_JA;
+			target = i + fp->jf + 1;
+			EMIT_JMP;
+			break;
+
+		/* ldxb 4 * ([14] & 0xf) is remaped into 6 insns. */
+		case BPF_LDX | BPF_MSH | BPF_B:
+			insn->code = BPF_ALU64 | BPF_MOV | BPF_X;
+			insn->a_reg = TMP_REG;
+			insn->x_reg = A_REG;
+			insn++;
+
+			insn->code = BPF_LD | BPF_ABS | BPF_B;
+			insn->a_reg = A_REG;
+			insn->imm = fp->k;
+			insn++;
+
+			insn->code = BPF_ALU | BPF_AND | BPF_K;
+			insn->a_reg = A_REG;
+			insn->imm = 0xf;
+			insn++;
+
+			insn->code = BPF_ALU | BPF_LSH | BPF_K;
+			insn->a_reg = A_REG;
+			insn->imm = 2;
+			insn++;
+
+			insn->code = BPF_ALU64 | BPF_MOV | BPF_X;
+			insn->a_reg = X_REG;
+			insn->x_reg = A_REG;
+			insn++;
+
+			insn->code = BPF_ALU64 | BPF_MOV | BPF_X;
+			insn->a_reg = A_REG;
+			insn->x_reg = TMP_REG;
+			break;
+
+		/* RET_K, RET_A are remaped into 2 insns. */
+		case BPF_RET | BPF_A:
+		case BPF_RET | BPF_K:
+			insn->code = BPF_ALU | BPF_MOV |
+				     (BPF_RVAL(fp->code) == BPF_K ?
+				      BPF_K : BPF_X);
+			insn->a_reg = 0;
+			insn->x_reg = A_REG;
+			insn->imm = fp->k;
+			insn++;
+
+			insn->code = BPF_JMP | BPF_EXIT;
+			break;
+
+		/* Store to stack. */
+		case BPF_ST:
+		case BPF_STX:
+			insn->code = BPF_STX | BPF_MEM | BPF_W;
+			insn->a_reg = FP_REG;
+			insn->x_reg = fp->code == BPF_ST ? A_REG : X_REG;
+			insn->off = -(BPF_MEMWORDS - fp->k) * 4;
+			break;
+
+		/* Load from stack. */
+		case BPF_LD | BPF_MEM:
+		case BPF_LDX | BPF_MEM:
+			insn->code = BPF_LDX | BPF_MEM | BPF_W;
+			insn->a_reg = BPF_CLASS(fp->code) == BPF_LD ?
+				      A_REG : X_REG;
+			insn->x_reg = FP_REG;
+			insn->off = -(BPF_MEMWORDS - fp->k) * 4;
+			break;
+
+		/* A = K or X = K */
+		case BPF_LD | BPF_IMM:
+		case BPF_LDX | BPF_IMM:
+			insn->code = BPF_ALU | BPF_MOV | BPF_K;
+			insn->a_reg = BPF_CLASS(fp->code) == BPF_LD ?
+				      A_REG : X_REG;
+			insn->imm = fp->k;
+			break;
+
+		/* X = A */
+		case BPF_MISC | BPF_TAX:
+			insn->code = BPF_ALU64 | BPF_MOV | BPF_X;
+			insn->a_reg = X_REG;
+			insn->x_reg = A_REG;
+			break;
+
+		/* A = X */
+		case BPF_MISC | BPF_TXA:
+			insn->code = BPF_ALU64 | BPF_MOV | BPF_X;
+			insn->a_reg = A_REG;
+			insn->x_reg = X_REG;
+			break;
+
+		/* A = skb->len or X = skb->len */
+		case BPF_LD | BPF_W | BPF_LEN:
+		case BPF_LDX | BPF_W | BPF_LEN:
+			insn->code = BPF_LDX | BPF_MEM | BPF_W;
+			insn->a_reg = BPF_CLASS(fp->code) == BPF_LD ?
+				      A_REG : X_REG;
+			insn->x_reg = CTX_REG;
+			insn->off = offsetof(struct sk_buff, len);
+			break;
+
+		/* access seccomp_data fields */
+		case BPF_LDX | BPF_ABS | BPF_W:
+			insn->code = BPF_LDX | BPF_MEM | BPF_W;
+			insn->a_reg = A_REG;
+			insn->x_reg = CTX_REG;
+			insn->off = fp->k;
+			break;
+
 		default:
-			WARN_RATELIMIT(1, "Unknown code:%u jt:%u tf:%u k:%u\n",
-				       fentry->code, fentry->jt,
-				       fentry->jf, fentry->k);
-			return 0;
+			goto err;
 		}
+
+		insn++;
+		if (new_prog)
+			memcpy(new_insn, tmp_insns,
+			       sizeof(*insn) * (insn - tmp_insns));
+
+		new_insn += insn - tmp_insns;
+	}
+
+	if (!new_prog) {
+		/* Only calculating new length. */
+		*new_len = new_insn - new_prog;
+		return 0;
 	}
 
+	pass++;
+	if (new_flen != new_insn - new_prog) {
+		new_flen = new_insn - new_prog;
+		if (pass > 2)
+			goto err;
+
+		goto do_pass;
+	}
+
+	kfree(addrs);
+	BUG_ON(*new_len != new_flen);
 	return 0;
+err:
+	kfree(addrs);
+	return -EINVAL;
 }
-EXPORT_SYMBOL(sk_run_filter);
 
-/*
- * Security :
+/* Security:
+ *
  * A BPF program is able to use 16 cells of memory to store intermediate
- * values (check u32 mem[BPF_MEMWORDS] in sk_run_filter())
+ * values (check u32 mem[BPF_MEMWORDS] in sk_run_filter()).
+ *
  * As we dont want to clear mem[] array for each packet going through
  * sk_run_filter(), we check that filter loaded by user never try to read
  * a cell if not previously written, and we check all branches to be sure
@@ -629,30 +1375,197 @@ int sk_chk_filter(struct sock_filter *filter, unsigned int flen)
 }
 EXPORT_SYMBOL(sk_chk_filter);
 
+static int sk_store_orig_filter(struct sk_filter *fp,
+				const struct sock_fprog *fprog)
+{
+	unsigned int fsize = sk_filter_proglen(fprog);
+	struct sock_fprog_kern *fkprog;
+
+	fp->orig_prog = kmalloc(sizeof(*fkprog), GFP_KERNEL);
+	if (!fp->orig_prog)
+		return -ENOMEM;
+
+	fkprog = fp->orig_prog;
+	fkprog->len = fprog->len;
+	fkprog->filter = kmemdup(fp->insns, fsize, GFP_KERNEL);
+	if (!fkprog->filter) {
+		kfree(fp->orig_prog);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void sk_release_orig_filter(struct sk_filter *fp)
+{
+	struct sock_fprog_kern *fprog = fp->orig_prog;
+
+	if (fprog) {
+		kfree(fprog->filter);
+		kfree(fprog);
+	}
+}
+
 /**
  * 	sk_filter_release_rcu - Release a socket filter by rcu_head
  *	@rcu: rcu_head that contains the sk_filter to free
  */
-void sk_filter_release_rcu(struct rcu_head *rcu)
+static void sk_filter_release_rcu(struct rcu_head *rcu)
 {
 	struct sk_filter *fp = container_of(rcu, struct sk_filter, rcu);
 
+	sk_release_orig_filter(fp);
 	bpf_jit_free(fp);
 }
-EXPORT_SYMBOL(sk_filter_release_rcu);
 
-static int __sk_prepare_filter(struct sk_filter *fp)
+/**
+ *	sk_filter_release - release a socket filter
+ *	@fp: filter to remove
+ *
+ *	Remove a filter from a socket and release its resources.
+ */
+static void sk_filter_release(struct sk_filter *fp)
+{
+	if (atomic_dec_and_test(&fp->refcnt))
+		call_rcu(&fp->rcu, sk_filter_release_rcu);
+}
+
+void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp)
+{
+	atomic_sub(sk_filter_size(fp->len), &sk->sk_omem_alloc);
+	sk_filter_release(fp);
+}
+
+void sk_filter_charge(struct sock *sk, struct sk_filter *fp)
+{
+	atomic_inc(&fp->refcnt);
+	atomic_add(sk_filter_size(fp->len), &sk->sk_omem_alloc);
+}
+
+static struct sk_filter *__sk_migrate_realloc(struct sk_filter *fp,
+					      struct sock *sk,
+					      unsigned int len)
+{
+	struct sk_filter *fp_new;
+
+	if (sk == NULL)
+		return krealloc(fp, len, GFP_KERNEL);
+
+	fp_new = sock_kmalloc(sk, len, GFP_KERNEL);
+	if (fp_new) {
+		memcpy(fp_new, fp, sizeof(struct sk_filter));
+		/* As we're kepping orig_prog in fp_new along,
+		 * we need to make sure we're not evicting it
+		 * from the old fp.
+		 */
+		fp->orig_prog = NULL;
+		sk_filter_uncharge(sk, fp);
+	}
+
+	return fp_new;
+}
+
+static struct sk_filter *__sk_migrate_filter(struct sk_filter *fp,
+					     struct sock *sk)
+{
+	struct sock_filter *old_prog;
+	struct sk_filter *old_fp;
+	int i, err, new_len, old_len = fp->len;
+
+	/* We are free to overwrite insns et al right here as it
+	 * won't be used at this point in time anymore internally
+	 * after the migration to the internal BPF instruction
+	 * representation.
+	 */
+	BUILD_BUG_ON(sizeof(struct sock_filter) !=
+		     sizeof(struct sock_filter_int));
+
+	/* For now, we need to unfiddle BPF_S_* identifiers in place.
+	 * This can sooner or later on be subject to removal, e.g. when
+	 * JITs have been converted.
+	 */
+	for (i = 0; i < fp->len; i++)
+		sk_decode_filter(&fp->insns[i], &fp->insns[i]);
+
+	/* Conversion cannot happen on overlapping memory areas,
+	 * so we need to keep the user BPF around until the 2nd
+	 * pass. At this time, the user BPF is stored in fp->insns.
+	 */
+	old_prog = kmemdup(fp->insns, old_len * sizeof(struct sock_filter),
+			   GFP_KERNEL);
+	if (!old_prog) {
+		err = -ENOMEM;
+		goto out_err;
+	}
+
+	/* 1st pass: calculate the new program length. */
+	err = sk_convert_filter(old_prog, old_len, NULL, &new_len);
+	if (err)
+		goto out_err_free;
+
+	/* Expand fp for appending the new filter representation. */
+	old_fp = fp;
+	fp = __sk_migrate_realloc(old_fp, sk, sk_filter_size(new_len));
+	if (!fp) {
+		/* The old_fp is still around in case we couldn't
+		 * allocate new memory, so uncharge on that one.
+		 */
+		fp = old_fp;
+		err = -ENOMEM;
+		goto out_err_free;
+	}
+
+	fp->bpf_func = sk_run_filter_int_skb;
+	fp->len = new_len;
+
+	/* 2nd pass: remap sock_filter insns into sock_filter_int insns. */
+	err = sk_convert_filter(old_prog, old_len, fp->insnsi, &new_len);
+	if (err)
+		/* 2nd sk_convert_filter() can fail only if it fails
+		 * to allocate memory, remapping must succeed. Note,
+		 * that at this time old_fp has already been released
+		 * by __sk_migrate_realloc().
+		 */
+		goto out_err_free;
+
+	kfree(old_prog);
+	return fp;
+
+out_err_free:
+	kfree(old_prog);
+out_err:
+	/* Rollback filter setup. */
+	if (sk != NULL)
+		sk_filter_uncharge(sk, fp);
+	else
+		kfree(fp);
+	return ERR_PTR(err);
+}
+
+static struct sk_filter *__sk_prepare_filter(struct sk_filter *fp,
+					     struct sock *sk)
 {
 	int err;
 
-	fp->bpf_func = sk_run_filter;
+	fp->bpf_func = NULL;
+	fp->jited = 0;
 
 	err = sk_chk_filter(fp->insns, fp->len);
 	if (err)
-		return err;
+		return ERR_PTR(err);
 
+	/* Probe if we can JIT compile the filter and if so, do
+	 * the compilation of the filter.
+	 */
 	bpf_jit_compile(fp);
-	return 0;
+
+	/* JIT compiler couldn't process this filter, so do the
+	 * internal BPF translation for the optimized interpreter.
+	 */
+	if (!fp->jited)
+		fp = __sk_migrate_filter(fp, sk);
+
+	return fp;
 }
 
 /**
@@ -668,9 +1581,8 @@ static int __sk_prepare_filter(struct sk_filter *fp)
 int sk_unattached_filter_create(struct sk_filter **pfp,
 				struct sock_fprog *fprog)
 {
+	unsigned int fsize = sk_filter_proglen(fprog);
 	struct sk_filter *fp;
-	unsigned int fsize = sizeof(struct sock_filter) * fprog->len;
-	int err;
 
 	/* Make sure new filter is there and in the right amounts. */
 	if (fprog->filter == NULL)
@@ -679,20 +1591,26 @@ int sk_unattached_filter_create(struct sk_filter **pfp,
 	fp = kmalloc(sk_filter_size(fprog->len), GFP_KERNEL);
 	if (!fp)
 		return -ENOMEM;
+
 	memcpy(fp->insns, fprog->filter, fsize);
 
 	atomic_set(&fp->refcnt, 1);
 	fp->len = fprog->len;
+	/* Since unattached filters are not copied back to user
+	 * space through sk_get_filter(), we do not need to hold
+	 * a copy here, and can spare us the work.
+	 */
+	fp->orig_prog = NULL;
 
-	err = __sk_prepare_filter(fp);
-	if (err)
-		goto free_mem;
+	/* __sk_prepare_filter() already takes care of uncharging
+	 * memory in case something goes wrong.
+	 */
+	fp = __sk_prepare_filter(fp, NULL);
+	if (IS_ERR(fp))
+		return PTR_ERR(fp);
 
 	*pfp = fp;
 	return 0;
-free_mem:
-	kfree(fp);
-	return err;
 }
 EXPORT_SYMBOL_GPL(sk_unattached_filter_create);
 
@@ -715,7 +1633,7 @@ EXPORT_SYMBOL_GPL(sk_unattached_filter_destroy);
 int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk)
 {
 	struct sk_filter *fp, *old_fp;
-	unsigned int fsize = sizeof(struct sock_filter) * fprog->len;
+	unsigned int fsize = sk_filter_proglen(fprog);
 	unsigned int sk_fsize = sk_filter_size(fprog->len);
 	int err;
 
@@ -729,6 +1647,7 @@ int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk)
 	fp = sock_kmalloc(sk, sk_fsize, GFP_KERNEL);
 	if (!fp)
 		return -ENOMEM;
+
 	if (copy_from_user(fp->insns, fprog->filter, fsize)) {
 		sock_kfree_s(sk, fp, sk_fsize);
 		return -EFAULT;
@@ -737,18 +1656,26 @@ int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk)
 	atomic_set(&fp->refcnt, 1);
 	fp->len = fprog->len;
 
-	err = __sk_prepare_filter(fp);
+	err = sk_store_orig_filter(fp, fprog);
 	if (err) {
 		sk_filter_uncharge(sk, fp);
-		return err;
+		return -ENOMEM;
 	}
 
+	/* __sk_prepare_filter() already takes care of uncharging
+	 * memory in case something goes wrong.
+	 */
+	fp = __sk_prepare_filter(fp, sk);
+	if (IS_ERR(fp))
+		return PTR_ERR(fp);
+
 	old_fp = rcu_dereference_protected(sk->sk_filter,
 					   sock_owned_by_user(sk));
 	rcu_assign_pointer(sk->sk_filter, fp);
 
 	if (old_fp)
 		sk_filter_uncharge(sk, old_fp);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(sk_attach_filter);
@@ -768,6 +1695,7 @@ int sk_detach_filter(struct sock *sk)
 		sk_filter_uncharge(sk, filter);
 		ret = 0;
 	}
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(sk_detach_filter);
@@ -850,34 +1778,41 @@ void sk_decode_filter(struct sock_filter *filt, struct sock_filter *to)
 	to->k = filt->k;
 }
 
-int sk_get_filter(struct sock *sk, struct sock_filter __user *ubuf, unsigned int len)
+int sk_get_filter(struct sock *sk, struct sock_filter __user *ubuf,
+		  unsigned int len)
 {
+	struct sock_fprog_kern *fprog;
 	struct sk_filter *filter;
-	int i, ret;
+	int ret = 0;
 
 	lock_sock(sk);
 	filter = rcu_dereference_protected(sk->sk_filter,
-			sock_owned_by_user(sk));
-	ret = 0;
+					   sock_owned_by_user(sk));
 	if (!filter)
 		goto out;
-	ret = filter->len;
+
+	/* We're copying the filter that has been originally attached,
+	 * so no conversion/decode needed anymore.
+	 */
+	fprog = filter->orig_prog;
+
+	ret = fprog->len;
 	if (!len)
+		/* User space only enquires number of filter blocks. */
 		goto out;
+
 	ret = -EINVAL;
-	if (len < filter->len)
+	if (len < fprog->len)
 		goto out;
 
 	ret = -EFAULT;
-	for (i = 0; i < filter->len; i++) {
-		struct sock_filter fb;
-
-		sk_decode_filter(&filter->insns[i], &fb);
-		if (copy_to_user(&ubuf[i], &fb, sizeof(fb)))
-			goto out;
-	}
+	if (copy_to_user(ubuf, fprog->filter, sk_filter_proglen(fprog)))
+		goto out;
 
-	ret = filter->len;
+	/* Instead of bytes, the API requests to return the number
+	 * of filter blocks.
+	 */
+	ret = fprog->len;
 out:
 	release_sock(sk);
 	return ret;
diff --git a/net/core/flow.c b/net/core/flow.c
index dfa602ceb8cd..31cfb365e0c6 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -24,6 +24,7 @@
 #include <net/flow.h>
 #include <linux/atomic.h>
 #include <linux/security.h>
+#include <net/net_namespace.h>
 
 struct flow_cache_entry {
 	union {
@@ -38,37 +39,14 @@ struct flow_cache_entry {
 	struct flow_cache_object	*object;
 };
 
-struct flow_cache_percpu {
-	struct hlist_head		*hash_table;
-	int				hash_count;
-	u32				hash_rnd;
-	int				hash_rnd_recalc;
-	struct tasklet_struct		flush_tasklet;
-};
-
 struct flow_flush_info {
 	struct flow_cache		*cache;
 	atomic_t			cpuleft;
 	struct completion		completion;
 };
 
-struct flow_cache {
-	u32				hash_shift;
-	struct flow_cache_percpu __percpu *percpu;
-	struct notifier_block		hotcpu_notifier;
-	int				low_watermark;
-	int				high_watermark;
-	struct timer_list		rnd_timer;
-};
-
-atomic_t flow_cache_genid = ATOMIC_INIT(0);
-EXPORT_SYMBOL(flow_cache_genid);
-static struct flow_cache flow_cache_global;
 static struct kmem_cache *flow_cachep __read_mostly;
 
-static DEFINE_SPINLOCK(flow_cache_gc_lock);
-static LIST_HEAD(flow_cache_gc_list);
-
 #define flow_cache_hash_size(cache)	(1 << (cache)->hash_shift)
 #define FLOW_HASH_RND_PERIOD		(10 * 60 * HZ)
 
@@ -84,16 +62,18 @@ static void flow_cache_new_hashrnd(unsigned long arg)
 	add_timer(&fc->rnd_timer);
 }
 
-static int flow_entry_valid(struct flow_cache_entry *fle)
+static int flow_entry_valid(struct flow_cache_entry *fle,
+				struct netns_xfrm *xfrm)
 {
-	if (atomic_read(&flow_cache_genid) != fle->genid)
+	if (atomic_read(&xfrm->flow_cache_genid) != fle->genid)
 		return 0;
 	if (fle->object && !fle->object->ops->check(fle->object))
 		return 0;
 	return 1;
 }
 
-static void flow_entry_kill(struct flow_cache_entry *fle)
+static void flow_entry_kill(struct flow_cache_entry *fle,
+				struct netns_xfrm *xfrm)
 {
 	if (fle->object)
 		fle->object->ops->delete(fle->object);
@@ -104,26 +84,28 @@ static void flow_cache_gc_task(struct work_struct *work)
 {
 	struct list_head gc_list;
 	struct flow_cache_entry *fce, *n;
+	struct netns_xfrm *xfrm = container_of(work, struct netns_xfrm,
+						flow_cache_gc_work);
 
 	INIT_LIST_HEAD(&gc_list);
-	spin_lock_bh(&flow_cache_gc_lock);
-	list_splice_tail_init(&flow_cache_gc_list, &gc_list);
-	spin_unlock_bh(&flow_cache_gc_lock);
+	spin_lock_bh(&xfrm->flow_cache_gc_lock);
+	list_splice_tail_init(&xfrm->flow_cache_gc_list, &gc_list);
+	spin_unlock_bh(&xfrm->flow_cache_gc_lock);
 
 	list_for_each_entry_safe(fce, n, &gc_list, u.gc_list)
-		flow_entry_kill(fce);
+		flow_entry_kill(fce, xfrm);
 }
-static DECLARE_WORK(flow_cache_gc_work, flow_cache_gc_task);
 
 static void flow_cache_queue_garbage(struct flow_cache_percpu *fcp,
-				     int deleted, struct list_head *gc_list)
+				     int deleted, struct list_head *gc_list,
+				     struct netns_xfrm *xfrm)
 {
 	if (deleted) {
 		fcp->hash_count -= deleted;
-		spin_lock_bh(&flow_cache_gc_lock);
-		list_splice_tail(gc_list, &flow_cache_gc_list);
-		spin_unlock_bh(&flow_cache_gc_lock);
-		schedule_work(&flow_cache_gc_work);
+		spin_lock_bh(&xfrm->flow_cache_gc_lock);
+		list_splice_tail(gc_list, &xfrm->flow_cache_gc_list);
+		spin_unlock_bh(&xfrm->flow_cache_gc_lock);
+		schedule_work(&xfrm->flow_cache_gc_work);
 	}
 }
 
@@ -135,6 +117,8 @@ static void __flow_cache_shrink(struct flow_cache *fc,
 	struct hlist_node *tmp;
 	LIST_HEAD(gc_list);
 	int i, deleted = 0;
+	struct netns_xfrm *xfrm = container_of(fc, struct netns_xfrm,
+						flow_cache_global);
 
 	for (i = 0; i < flow_cache_hash_size(fc); i++) {
 		int saved = 0;
@@ -142,7 +126,7 @@ static void __flow_cache_shrink(struct flow_cache *fc,
 		hlist_for_each_entry_safe(fle, tmp,
 					  &fcp->hash_table[i], u.hlist) {
 			if (saved < shrink_to &&
-			    flow_entry_valid(fle)) {
+			    flow_entry_valid(fle, xfrm)) {
 				saved++;
 			} else {
 				deleted++;
@@ -152,7 +136,7 @@ static void __flow_cache_shrink(struct flow_cache *fc,
 		}
 	}
 
-	flow_cache_queue_garbage(fcp, deleted, &gc_list);
+	flow_cache_queue_garbage(fcp, deleted, &gc_list, xfrm);
 }
 
 static void flow_cache_shrink(struct flow_cache *fc,
@@ -208,7 +192,7 @@ struct flow_cache_object *
 flow_cache_lookup(struct net *net, const struct flowi *key, u16 family, u8 dir,
 		  flow_resolve_t resolver, void *ctx)
 {
-	struct flow_cache *fc = &flow_cache_global;
+	struct flow_cache *fc = &net->xfrm.flow_cache_global;
 	struct flow_cache_percpu *fcp;
 	struct flow_cache_entry *fle, *tfle;
 	struct flow_cache_object *flo;
@@ -258,7 +242,7 @@ flow_cache_lookup(struct net *net, const struct flowi *key, u16 family, u8 dir,
 			hlist_add_head(&fle->u.hlist, &fcp->hash_table[hash]);
 			fcp->hash_count++;
 		}
-	} else if (likely(fle->genid == atomic_read(&flow_cache_genid))) {
+	} else if (likely(fle->genid == atomic_read(&net->xfrm.flow_cache_genid))) {
 		flo = fle->object;
 		if (!flo)
 			goto ret_object;
@@ -279,7 +263,7 @@ nocache:
 	}
 	flo = resolver(net, key, family, dir, flo, ctx);
 	if (fle) {
-		fle->genid = atomic_read(&flow_cache_genid);
+		fle->genid = atomic_read(&net->xfrm.flow_cache_genid);
 		if (!IS_ERR(flo))
 			fle->object = flo;
 		else
@@ -303,12 +287,14 @@ static void flow_cache_flush_tasklet(unsigned long data)
 	struct hlist_node *tmp;
 	LIST_HEAD(gc_list);
 	int i, deleted = 0;
+	struct netns_xfrm *xfrm = container_of(fc, struct netns_xfrm,
+						flow_cache_global);
 
 	fcp = this_cpu_ptr(fc->percpu);
 	for (i = 0; i < flow_cache_hash_size(fc); i++) {
 		hlist_for_each_entry_safe(fle, tmp,
 					  &fcp->hash_table[i], u.hlist) {
-			if (flow_entry_valid(fle))
+			if (flow_entry_valid(fle, xfrm))
 				continue;
 
 			deleted++;
@@ -317,7 +303,7 @@ static void flow_cache_flush_tasklet(unsigned long data)
 		}
 	}
 
-	flow_cache_queue_garbage(fcp, deleted, &gc_list);
+	flow_cache_queue_garbage(fcp, deleted, &gc_list, xfrm);
 
 	if (atomic_dec_and_test(&info->cpuleft))
 		complete(&info->completion);
@@ -351,10 +337,9 @@ static void flow_cache_flush_per_cpu(void *data)
 	tasklet_schedule(tasklet);
 }
 
-void flow_cache_flush(void)
+void flow_cache_flush(struct net *net)
 {
 	struct flow_flush_info info;
-	static DEFINE_MUTEX(flow_flush_sem);
 	cpumask_var_t mask;
 	int i, self;
 
@@ -365,8 +350,8 @@ void flow_cache_flush(void)
 
 	/* Don't want cpus going down or up during this. */
 	get_online_cpus();
-	mutex_lock(&flow_flush_sem);
-	info.cache = &flow_cache_global;
+	mutex_lock(&net->xfrm.flow_flush_sem);
+	info.cache = &net->xfrm.flow_cache_global;
 	for_each_online_cpu(i)
 		if (!flow_cache_percpu_empty(info.cache, i))
 			cpumask_set_cpu(i, mask);
@@ -386,21 +371,23 @@ void flow_cache_flush(void)
 	wait_for_completion(&info.completion);
 
 done:
-	mutex_unlock(&flow_flush_sem);
+	mutex_unlock(&net->xfrm.flow_flush_sem);
 	put_online_cpus();
 	free_cpumask_var(mask);
 }
 
 static void flow_cache_flush_task(struct work_struct *work)
 {
-	flow_cache_flush();
-}
+	struct netns_xfrm *xfrm = container_of(work, struct netns_xfrm,
+						flow_cache_gc_work);
+	struct net *net = container_of(xfrm, struct net, xfrm);
 
-static DECLARE_WORK(flow_cache_flush_work, flow_cache_flush_task);
+	flow_cache_flush(net);
+}
 
-void flow_cache_flush_deferred(void)
+void flow_cache_flush_deferred(struct net *net)
 {
-	schedule_work(&flow_cache_flush_work);
+	schedule_work(&net->xfrm.flow_cache_flush_work);
 }
 
 static int flow_cache_cpu_prepare(struct flow_cache *fc, int cpu)
@@ -425,7 +412,8 @@ static int flow_cache_cpu(struct notifier_block *nfb,
 			  unsigned long action,
 			  void *hcpu)
 {
-	struct flow_cache *fc = container_of(nfb, struct flow_cache, hotcpu_notifier);
+	struct flow_cache *fc = container_of(nfb, struct flow_cache,
+						hotcpu_notifier);
 	int res, cpu = (unsigned long) hcpu;
 	struct flow_cache_percpu *fcp = per_cpu_ptr(fc->percpu, cpu);
 
@@ -444,9 +432,20 @@ static int flow_cache_cpu(struct notifier_block *nfb,
 	return NOTIFY_OK;
 }
 
-static int __init flow_cache_init(struct flow_cache *fc)
+int flow_cache_init(struct net *net)
 {
 	int i;
+	struct flow_cache *fc = &net->xfrm.flow_cache_global;
+
+	if (!flow_cachep)
+		flow_cachep = kmem_cache_create("flow_cache",
+						sizeof(struct flow_cache_entry),
+						0, SLAB_PANIC, NULL);
+	spin_lock_init(&net->xfrm.flow_cache_gc_lock);
+	INIT_LIST_HEAD(&net->xfrm.flow_cache_gc_list);
+	INIT_WORK(&net->xfrm.flow_cache_gc_work, flow_cache_gc_task);
+	INIT_WORK(&net->xfrm.flow_cache_flush_work, flow_cache_flush_task);
+	mutex_init(&net->xfrm.flow_flush_sem);
 
 	fc->hash_shift = 10;
 	fc->low_watermark = 2 * flow_cache_hash_size(fc);
@@ -484,14 +483,23 @@ err:
 
 	return -ENOMEM;
 }
+EXPORT_SYMBOL(flow_cache_init);
 
-static int __init flow_cache_init_global(void)
+void flow_cache_fini(struct net *net)
 {
-	flow_cachep = kmem_cache_create("flow_cache",
-					sizeof(struct flow_cache_entry),
-					0, SLAB_PANIC, NULL);
+	int i;
+	struct flow_cache *fc = &net->xfrm.flow_cache_global;
 
-	return flow_cache_init(&flow_cache_global);
-}
+	del_timer_sync(&fc->rnd_timer);
+	unregister_hotcpu_notifier(&fc->hotcpu_notifier);
 
-module_init(flow_cache_init_global);
+	for_each_possible_cpu(i) {
+		struct flow_cache_percpu *fcp = per_cpu_ptr(fc->percpu, i);
+		kfree(fcp->hash_table);
+		fcp->hash_table = NULL;
+	}
+
+	free_percpu(fc->percpu);
+	fc->percpu = NULL;
+}
+EXPORT_SYMBOL(flow_cache_fini);
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index e29e810663d7..107ed12a5323 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -61,7 +61,7 @@ bool skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow)
 
 again:
 	switch (proto) {
-	case __constant_htons(ETH_P_IP): {
+	case htons(ETH_P_IP): {
 		const struct iphdr *iph;
 		struct iphdr _iph;
 ip:
@@ -77,7 +77,7 @@ ip:
 		iph_to_flow_copy_addrs(flow, iph);
 		break;
 	}
-	case __constant_htons(ETH_P_IPV6): {
+	case htons(ETH_P_IPV6): {
 		const struct ipv6hdr *iph;
 		struct ipv6hdr _iph;
 ipv6:
@@ -91,8 +91,8 @@ ipv6:
 		nhoff += sizeof(struct ipv6hdr);
 		break;
 	}
-	case __constant_htons(ETH_P_8021AD):
-	case __constant_htons(ETH_P_8021Q): {
+	case htons(ETH_P_8021AD):
+	case htons(ETH_P_8021Q): {
 		const struct vlan_hdr *vlan;
 		struct vlan_hdr _vlan;
 
@@ -104,7 +104,7 @@ ipv6:
 		nhoff += sizeof(*vlan);
 		goto again;
 	}
-	case __constant_htons(ETH_P_PPP_SES): {
+	case htons(ETH_P_PPP_SES): {
 		struct {
 			struct pppoe_hdr hdr;
 			__be16 proto;
@@ -115,9 +115,9 @@ ipv6:
 		proto = hdr->proto;
 		nhoff += PPPOE_SES_HLEN;
 		switch (proto) {
-		case __constant_htons(PPP_IP):
+		case htons(PPP_IP):
 			goto ip;
-		case __constant_htons(PPP_IPV6):
+		case htons(PPP_IPV6):
 			goto ipv6;
 		default:
 			return false;
@@ -203,8 +203,8 @@ static __always_inline u32 __flow_hash_1word(u32 a)
 
 /*
  * __skb_get_hash: calculate a flow hash based on src/dst addresses
- * and src/dst port numbers.  Sets rxhash in skb to non-zero hash value
- * on success, zero indicates no valid hash.  Also, sets l4_rxhash in skb
+ * and src/dst port numbers.  Sets hash in skb to non-zero hash value
+ * on success, zero indicates no valid hash.  Also, sets l4_hash in skb
  * if hash is a canonical 4-tuple hash over transport ports.
  */
 void __skb_get_hash(struct sk_buff *skb)
@@ -216,7 +216,7 @@ void __skb_get_hash(struct sk_buff *skb)
 		return;
 
 	if (keys.ports)
-		skb->l4_rxhash = 1;
+		skb->l4_hash = 1;
 
 	/* get a consistent hash (same value on both flow directions) */
 	if (((__force u32)keys.dst < (__force u32)keys.src) ||
@@ -232,7 +232,7 @@ void __skb_get_hash(struct sk_buff *skb)
 	if (!hash)
 		hash = 1;
 
-	skb->rxhash = hash;
+	skb->hash = hash;
 }
 EXPORT_SYMBOL(__skb_get_hash);
 
@@ -344,7 +344,7 @@ static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb)
 					hash = skb->sk->sk_hash;
 				else
 					hash = (__force u16) skb->protocol ^
-					    skb->rxhash;
+					    skb->hash;
 				hash = __flow_hash_1word(hash);
 				queue_index = map->queues[
 				    ((u64)hash * map->len) >> 32];
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index e16129019c66..8f8a96ef9f3f 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -836,10 +836,10 @@ out:
 static __inline__ int neigh_max_probes(struct neighbour *n)
 {
 	struct neigh_parms *p = n->parms;
-	return (n->nud_state & NUD_PROBE) ?
-		NEIGH_VAR(p, UCAST_PROBES) :
-		NEIGH_VAR(p, UCAST_PROBES) + NEIGH_VAR(p, APP_PROBES) +
-		NEIGH_VAR(p, MCAST_PROBES);
+	int max_probes = NEIGH_VAR(p, UCAST_PROBES) + NEIGH_VAR(p, APP_PROBES);
+	if (!(n->nud_state & NUD_PROBE))
+		max_probes += NEIGH_VAR(p, MCAST_PROBES);
+	return max_probes;
 }
 
 static void neigh_invalidate(struct neighbour *neigh)
@@ -945,6 +945,7 @@ static void neigh_timer_handler(unsigned long arg)
 		neigh->nud_state = NUD_FAILED;
 		notify = 1;
 		neigh_invalidate(neigh);
+		goto out;
 	}
 
 	if (neigh->nud_state & NUD_IN_TIMER) {
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 549043c078c9..1cac29ebb05b 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -104,6 +104,7 @@ static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
 }
 
 NETDEVICE_SHOW_RO(dev_id, fmt_hex);
+NETDEVICE_SHOW_RO(dev_port, fmt_dec);
 NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec);
 NETDEVICE_SHOW_RO(addr_len, fmt_dec);
 NETDEVICE_SHOW_RO(iflink, fmt_dec);
@@ -252,6 +253,16 @@ static ssize_t operstate_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(operstate);
 
+static ssize_t carrier_changes_show(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct net_device *netdev = to_net_dev(dev);
+	return sprintf(buf, fmt_dec,
+		       atomic_read(&netdev->carrier_changes));
+}
+static DEVICE_ATTR_RO(carrier_changes);
+
 /* read-write attributes */
 
 static int change_mtu(struct net_device *net, unsigned long new_mtu)
@@ -373,6 +384,7 @@ static struct attribute *net_class_attrs[] = {
 	&dev_attr_netdev_group.attr,
 	&dev_attr_type.attr,
 	&dev_attr_dev_id.attr,
+	&dev_attr_dev_port.attr,
 	&dev_attr_iflink.attr,
 	&dev_attr_ifindex.attr,
 	&dev_attr_addr_assign_type.attr,
@@ -384,6 +396,7 @@ static struct attribute *net_class_attrs[] = {
 	&dev_attr_duplex.attr,
 	&dev_attr_dormant.attr,
 	&dev_attr_operstate.attr,
+	&dev_attr_carrier_changes.attr,
 	&dev_attr_ifalias.attr,
 	&dev_attr_carrier.attr,
 	&dev_attr_mtu.attr,
@@ -996,15 +1009,12 @@ static struct attribute_group dql_group = {
 #endif /* CONFIG_BQL */
 
 #ifdef CONFIG_XPS
-static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue)
+static unsigned int get_netdev_queue_index(struct netdev_queue *queue)
 {
 	struct net_device *dev = queue->dev;
-	int i;
-
-	for (i = 0; i < dev->num_tx_queues; i++)
-		if (queue == &dev->_tx[i])
-			break;
+	unsigned int i;
 
+	i = queue - dev->_tx;
 	BUG_ON(i >= dev->num_tx_queues);
 
 	return i;
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index df9e6b1a9759..e33937fb32a0 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -46,13 +46,9 @@
 
 static struct sk_buff_head skb_pool;
 
-static atomic_t trapped;
-
 DEFINE_STATIC_SRCU(netpoll_srcu);
 
 #define USEC_PER_POLL	50
-#define NETPOLL_RX_ENABLED  1
-#define NETPOLL_RX_DROP     2
 
 #define MAX_SKB_SIZE							\
 	(sizeof(struct ethhdr) +					\
@@ -61,7 +57,6 @@ DEFINE_STATIC_SRCU(netpoll_srcu);
 	 MAX_UDP_CHUNK)
 
 static void zap_completion_queue(void);
-static void netpoll_neigh_reply(struct sk_buff *skb, struct netpoll_info *npinfo);
 static void netpoll_async_cleanup(struct work_struct *work);
 
 static unsigned int carrier_timeout = 4;
@@ -74,6 +69,37 @@ module_param(carrier_timeout, uint, 0644);
 #define np_notice(np, fmt, ...)				\
 	pr_notice("%s: " fmt, np->name, ##__VA_ARGS__)
 
+static int netpoll_start_xmit(struct sk_buff *skb, struct net_device *dev,
+			      struct netdev_queue *txq)
+{
+	const struct net_device_ops *ops = dev->netdev_ops;
+	int status = NETDEV_TX_OK;
+	netdev_features_t features;
+
+	features = netif_skb_features(skb);
+
+	if (vlan_tx_tag_present(skb) &&
+	    !vlan_hw_offload_capable(features, skb->vlan_proto)) {
+		skb = __vlan_put_tag(skb, skb->vlan_proto,
+				     vlan_tx_tag_get(skb));
+		if (unlikely(!skb)) {
+			/* This is actually a packet drop, but we
+			 * don't want the code that calls this
+			 * function to try and operate on a NULL skb.
+			 */
+			goto out;
+		}
+		skb->vlan_tci = 0;
+	}
+
+	status = ops->ndo_start_xmit(skb, dev);
+	if (status == NETDEV_TX_OK)
+		txq_trans_update(txq);
+
+out:
+	return status;
+}
+
 static void queue_process(struct work_struct *work)
 {
 	struct netpoll_info *npinfo =
@@ -83,51 +109,31 @@ static void queue_process(struct work_struct *work)
 
 	while ((skb = skb_dequeue(&npinfo->txq))) {
 		struct net_device *dev = skb->dev;
-		const struct net_device_ops *ops = dev->netdev_ops;
 		struct netdev_queue *txq;
 
 		if (!netif_device_present(dev) || !netif_running(dev)) {
-			__kfree_skb(skb);
+			kfree_skb(skb);
 			continue;
 		}
 
 		txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
 
 		local_irq_save(flags);
-		__netif_tx_lock(txq, smp_processor_id());
+		HARD_TX_LOCK(dev, txq, smp_processor_id());
 		if (netif_xmit_frozen_or_stopped(txq) ||
-		    ops->ndo_start_xmit(skb, dev) != NETDEV_TX_OK) {
+		    netpoll_start_xmit(skb, dev, txq) != NETDEV_TX_OK) {
 			skb_queue_head(&npinfo->txq, skb);
-			__netif_tx_unlock(txq);
+			HARD_TX_UNLOCK(dev, txq);
 			local_irq_restore(flags);
 
 			schedule_delayed_work(&npinfo->tx_work, HZ/10);
 			return;
 		}
-		__netif_tx_unlock(txq);
+		HARD_TX_UNLOCK(dev, txq);
 		local_irq_restore(flags);
 	}
 }
 
-static __sum16 checksum_udp(struct sk_buff *skb, struct udphdr *uh,
-			    unsigned short ulen, __be32 saddr, __be32 daddr)
-{
-	__wsum psum;
-
-	if (uh->check == 0 || skb_csum_unnecessary(skb))
-		return 0;
-
-	psum = csum_tcpudp_nofold(saddr, daddr, ulen, IPPROTO_UDP, 0);
-
-	if (skb->ip_summed == CHECKSUM_COMPLETE &&
-	    !csum_fold(csum_add(psum, skb->csum)))
-		return 0;
-
-	skb->csum = psum;
-
-	return __skb_checksum_complete(skb);
-}
-
 /*
  * Check whether delayed processing was scheduled for our NIC. If so,
  * we attempt to grab the poll lock and use ->poll() to pump the card.
@@ -138,14 +144,8 @@ static __sum16 checksum_udp(struct sk_buff *skb, struct udphdr *uh,
  * trylock here and interrupts are already disabled in the softirq
  * case. Further, we test the poll_owner to avoid recursion on UP
  * systems where the lock doesn't exist.
- *
- * In cases where there is bi-directional communications, reading only
- * one message at a time can lead to packets being dropped by the
- * network adapter, forcing superfluous retries and possibly timeouts.
- * Thus, we set our budget to greater than 1.
  */
-static int poll_one_napi(struct netpoll_info *npinfo,
-			 struct napi_struct *napi, int budget)
+static int poll_one_napi(struct napi_struct *napi, int budget)
 {
 	int work;
 
@@ -156,52 +156,35 @@ static int poll_one_napi(struct netpoll_info *npinfo,
 	if (!test_bit(NAPI_STATE_SCHED, &napi->state))
 		return budget;
 
-	npinfo->rx_flags |= NETPOLL_RX_DROP;
-	atomic_inc(&trapped);
 	set_bit(NAPI_STATE_NPSVC, &napi->state);
 
 	work = napi->poll(napi, budget);
+	WARN_ONCE(work > budget, "%pF exceeded budget in poll\n", napi->poll);
 	trace_napi_poll(napi);
 
 	clear_bit(NAPI_STATE_NPSVC, &napi->state);
-	atomic_dec(&trapped);
-	npinfo->rx_flags &= ~NETPOLL_RX_DROP;
 
 	return budget - work;
 }
 
-static void poll_napi(struct net_device *dev)
+static void poll_napi(struct net_device *dev, int budget)
 {
 	struct napi_struct *napi;
-	int budget = 16;
 
 	list_for_each_entry(napi, &dev->napi_list, dev_list) {
 		if (napi->poll_owner != smp_processor_id() &&
 		    spin_trylock(&napi->poll_lock)) {
-			budget = poll_one_napi(rcu_dereference_bh(dev->npinfo),
-					       napi, budget);
+			budget = poll_one_napi(napi, budget);
 			spin_unlock(&napi->poll_lock);
-
-			if (!budget)
-				break;
 		}
 	}
 }
 
-static void service_neigh_queue(struct netpoll_info *npi)
-{
-	if (npi) {
-		struct sk_buff *skb;
-
-		while ((skb = skb_dequeue(&npi->neigh_tx)))
-			netpoll_neigh_reply(skb, npi);
-	}
-}
-
 static void netpoll_poll_dev(struct net_device *dev)
 {
 	const struct net_device_ops *ops;
 	struct netpoll_info *ni = rcu_dereference_bh(dev->npinfo);
+	int budget = 0;
 
 	/* Don't do any rx activity if the dev_lock mutex is held
 	 * the dev_open/close paths use this to block netpoll activity
@@ -224,31 +207,14 @@ static void netpoll_poll_dev(struct net_device *dev)
 	/* Process pending work on NIC */
 	ops->ndo_poll_controller(dev);
 
-	poll_napi(dev);
+	poll_napi(dev, budget);
 
 	up(&ni->dev_lock);
 
-	if (dev->flags & IFF_SLAVE) {
-		if (ni) {
-			struct net_device *bond_dev;
-			struct sk_buff *skb;
-			struct netpoll_info *bond_ni;
-
-			bond_dev = netdev_master_upper_dev_get_rcu(dev);
-			bond_ni = rcu_dereference_bh(bond_dev->npinfo);
-			while ((skb = skb_dequeue(&ni->neigh_tx))) {
-				skb->dev = bond_dev;
-				skb_queue_tail(&bond_ni->neigh_tx, skb);
-			}
-		}
-	}
-
-	service_neigh_queue(ni);
-
 	zap_completion_queue();
 }
 
-void netpoll_rx_disable(struct net_device *dev)
+void netpoll_poll_disable(struct net_device *dev)
 {
 	struct netpoll_info *ni;
 	int idx;
@@ -259,9 +225,9 @@ void netpoll_rx_disable(struct net_device *dev)
 		down(&ni->dev_lock);
 	srcu_read_unlock(&netpoll_srcu, idx);
 }
-EXPORT_SYMBOL(netpoll_rx_disable);
+EXPORT_SYMBOL(netpoll_poll_disable);
 
-void netpoll_rx_enable(struct net_device *dev)
+void netpoll_poll_enable(struct net_device *dev)
 {
 	struct netpoll_info *ni;
 	rcu_read_lock();
@@ -270,7 +236,7 @@ void netpoll_rx_enable(struct net_device *dev)
 		up(&ni->dev_lock);
 	rcu_read_unlock();
 }
-EXPORT_SYMBOL(netpoll_rx_enable);
+EXPORT_SYMBOL(netpoll_poll_enable);
 
 static void refill_skbs(void)
 {
@@ -304,7 +270,7 @@ static void zap_completion_queue(void)
 		while (clist != NULL) {
 			struct sk_buff *skb = clist;
 			clist = clist->next;
-			if (skb->destructor) {
+			if (!skb_irq_freeable(skb)) {
 				atomic_inc(&skb->users);
 				dev_kfree_skb_any(skb); /* put this one back */
 			} else {
@@ -359,7 +325,6 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
 {
 	int status = NETDEV_TX_BUSY;
 	unsigned long tries;
-	const struct net_device_ops *ops = dev->netdev_ops;
 	/* It is up to the caller to keep npinfo alive. */
 	struct netpoll_info *npinfo;
 
@@ -367,7 +332,7 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
 
 	npinfo = rcu_dereference_bh(np->dev->npinfo);
 	if (!npinfo || !netif_running(dev) || !netif_device_present(dev)) {
-		__kfree_skb(skb);
+		dev_kfree_skb_irq(skb);
 		return;
 	}
 
@@ -380,29 +345,11 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
 		/* try until next clock tick */
 		for (tries = jiffies_to_usecs(1)/USEC_PER_POLL;
 		     tries > 0; --tries) {
-			if (__netif_tx_trylock(txq)) {
-				if (!netif_xmit_stopped(txq)) {
-					if (vlan_tx_tag_present(skb) &&
-					    !vlan_hw_offload_capable(netif_skb_features(skb),
-								     skb->vlan_proto)) {
-						skb = __vlan_put_tag(skb, skb->vlan_proto, vlan_tx_tag_get(skb));
-						if (unlikely(!skb)) {
-							/* This is actually a packet drop, but we
-							 * don't want the code at the end of this
-							 * function to try and re-queue a NULL skb.
-							 */
-							status = NETDEV_TX_OK;
-							goto unlock_txq;
-						}
-						skb->vlan_tci = 0;
-					}
-
-					status = ops->ndo_start_xmit(skb, dev);
-					if (status == NETDEV_TX_OK)
-						txq_trans_update(txq);
-				}
-			unlock_txq:
-				__netif_tx_unlock(txq);
+			if (HARD_TX_TRYLOCK(dev, txq)) {
+				if (!netif_xmit_stopped(txq))
+					status = netpoll_start_xmit(skb, dev, txq);
+
+				HARD_TX_UNLOCK(dev, txq);
 
 				if (status == NETDEV_TX_OK)
 					break;
@@ -417,7 +364,7 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
 
 		WARN_ONCE(!irqs_disabled(),
 			"netpoll_send_skb_on_dev(): %s enabled interrupts in poll (%pF)\n",
-			dev->name, ops->ndo_start_xmit);
+			dev->name, dev->netdev_ops->ndo_start_xmit);
 
 	}
 
@@ -529,384 +476,6 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
 }
 EXPORT_SYMBOL(netpoll_send_udp);
 
-static void netpoll_neigh_reply(struct sk_buff *skb, struct netpoll_info *npinfo)
-{
-	int size, type = ARPOP_REPLY;
-	__be32 sip, tip;
-	unsigned char *sha;
-	struct sk_buff *send_skb;
-	struct netpoll *np, *tmp;
-	unsigned long flags;
-	int hlen, tlen;
-	int hits = 0, proto;
-
-	if (list_empty(&npinfo->rx_np))
-		return;
-
-	/* Before checking the packet, we do some early
-	   inspection whether this is interesting at all */
-	spin_lock_irqsave(&npinfo->rx_lock, flags);
-	list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
-		if (np->dev == skb->dev)
-			hits++;
-	}
-	spin_unlock_irqrestore(&npinfo->rx_lock, flags);
-
-	/* No netpoll struct is using this dev */
-	if (!hits)
-		return;
-
-	proto = ntohs(eth_hdr(skb)->h_proto);
-	if (proto == ETH_P_ARP) {
-		struct arphdr *arp;
-		unsigned char *arp_ptr;
-		/* No arp on this interface */
-		if (skb->dev->flags & IFF_NOARP)
-			return;
-
-		if (!pskb_may_pull(skb, arp_hdr_len(skb->dev)))
-			return;
-
-		skb_reset_network_header(skb);
-		skb_reset_transport_header(skb);
-		arp = arp_hdr(skb);
-
-		if ((arp->ar_hrd != htons(ARPHRD_ETHER) &&
-		     arp->ar_hrd != htons(ARPHRD_IEEE802)) ||
-		    arp->ar_pro != htons(ETH_P_IP) ||
-		    arp->ar_op != htons(ARPOP_REQUEST))
-			return;
-
-		arp_ptr = (unsigned char *)(arp+1);
-		/* save the location of the src hw addr */
-		sha = arp_ptr;
-		arp_ptr += skb->dev->addr_len;
-		memcpy(&sip, arp_ptr, 4);
-		arp_ptr += 4;
-		/* If we actually cared about dst hw addr,
-		   it would get copied here */
-		arp_ptr += skb->dev->addr_len;
-		memcpy(&tip, arp_ptr, 4);
-
-		/* Should we ignore arp? */
-		if (ipv4_is_loopback(tip) || ipv4_is_multicast(tip))
-			return;
-
-		size = arp_hdr_len(skb->dev);
-
-		spin_lock_irqsave(&npinfo->rx_lock, flags);
-		list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
-			if (tip != np->local_ip.ip)
-				continue;
-
-			hlen = LL_RESERVED_SPACE(np->dev);
-			tlen = np->dev->needed_tailroom;
-			send_skb = find_skb(np, size + hlen + tlen, hlen);
-			if (!send_skb)
-				continue;
-
-			skb_reset_network_header(send_skb);
-			arp = (struct arphdr *) skb_put(send_skb, size);
-			send_skb->dev = skb->dev;
-			send_skb->protocol = htons(ETH_P_ARP);
-
-			/* Fill the device header for the ARP frame */
-			if (dev_hard_header(send_skb, skb->dev, ETH_P_ARP,
-					    sha, np->dev->dev_addr,
-					    send_skb->len) < 0) {
-				kfree_skb(send_skb);
-				continue;
-			}
-
-			/*
-			 * Fill out the arp protocol part.
-			 *
-			 * we only support ethernet device type,
-			 * which (according to RFC 1390) should
-			 * always equal 1 (Ethernet).
-			 */
-
-			arp->ar_hrd = htons(np->dev->type);
-			arp->ar_pro = htons(ETH_P_IP);
-			arp->ar_hln = np->dev->addr_len;
-			arp->ar_pln = 4;
-			arp->ar_op = htons(type);
-
-			arp_ptr = (unsigned char *)(arp + 1);
-			memcpy(arp_ptr, np->dev->dev_addr, np->dev->addr_len);
-			arp_ptr += np->dev->addr_len;
-			memcpy(arp_ptr, &tip, 4);
-			arp_ptr += 4;
-			memcpy(arp_ptr, sha, np->dev->addr_len);
-			arp_ptr += np->dev->addr_len;
-			memcpy(arp_ptr, &sip, 4);
-
-			netpoll_send_skb(np, send_skb);
-
-			/* If there are several rx_skb_hooks for the same
-			 * address we're fine by sending a single reply
-			 */
-			break;
-		}
-		spin_unlock_irqrestore(&npinfo->rx_lock, flags);
-	} else if( proto == ETH_P_IPV6) {
-#if IS_ENABLED(CONFIG_IPV6)
-		struct nd_msg *msg;
-		u8 *lladdr = NULL;
-		struct ipv6hdr *hdr;
-		struct icmp6hdr *icmp6h;
-		const struct in6_addr *saddr;
-		const struct in6_addr *daddr;
-		struct inet6_dev *in6_dev = NULL;
-		struct in6_addr *target;
-
-		in6_dev = in6_dev_get(skb->dev);
-		if (!in6_dev || !in6_dev->cnf.accept_ra)
-			return;
-
-		if (!pskb_may_pull(skb, skb->len))
-			return;
-
-		msg = (struct nd_msg *)skb_transport_header(skb);
-
-		__skb_push(skb, skb->data - skb_transport_header(skb));
-
-		if (ipv6_hdr(skb)->hop_limit != 255)
-			return;
-		if (msg->icmph.icmp6_code != 0)
-			return;
-		if (msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
-			return;
-
-		saddr = &ipv6_hdr(skb)->saddr;
-		daddr = &ipv6_hdr(skb)->daddr;
-
-		size = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
-
-		spin_lock_irqsave(&npinfo->rx_lock, flags);
-		list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
-			if (!ipv6_addr_equal(daddr, &np->local_ip.in6))
-				continue;
-
-			hlen = LL_RESERVED_SPACE(np->dev);
-			tlen = np->dev->needed_tailroom;
-			send_skb = find_skb(np, size + hlen + tlen, hlen);
-			if (!send_skb)
-				continue;
-
-			send_skb->protocol = htons(ETH_P_IPV6);
-			send_skb->dev = skb->dev;
-
-			skb_reset_network_header(send_skb);
-			hdr = (struct ipv6hdr *) skb_put(send_skb, sizeof(struct ipv6hdr));
-			*(__be32*)hdr = htonl(0x60000000);
-			hdr->payload_len = htons(size);
-			hdr->nexthdr = IPPROTO_ICMPV6;
-			hdr->hop_limit = 255;
-			hdr->saddr = *saddr;
-			hdr->daddr = *daddr;
-
-			icmp6h = (struct icmp6hdr *) skb_put(send_skb, sizeof(struct icmp6hdr));
-			icmp6h->icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
-			icmp6h->icmp6_router = 0;
-			icmp6h->icmp6_solicited = 1;
-
-			target = (struct in6_addr *) skb_put(send_skb, sizeof(struct in6_addr));
-			*target = msg->target;
-			icmp6h->icmp6_cksum = csum_ipv6_magic(saddr, daddr, size,
-							      IPPROTO_ICMPV6,
-							      csum_partial(icmp6h,
-									   size, 0));
-
-			if (dev_hard_header(send_skb, skb->dev, ETH_P_IPV6,
-					    lladdr, np->dev->dev_addr,
-					    send_skb->len) < 0) {
-				kfree_skb(send_skb);
-				continue;
-			}
-
-			netpoll_send_skb(np, send_skb);
-
-			/* If there are several rx_skb_hooks for the same
-			 * address, we're fine by sending a single reply
-			 */
-			break;
-		}
-		spin_unlock_irqrestore(&npinfo->rx_lock, flags);
-#endif
-	}
-}
-
-static bool pkt_is_ns(struct sk_buff *skb)
-{
-	struct nd_msg *msg;
-	struct ipv6hdr *hdr;
-
-	if (skb->protocol != htons(ETH_P_IPV6))
-		return false;
-	if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + sizeof(struct nd_msg)))
-		return false;
-
-	msg = (struct nd_msg *)skb_transport_header(skb);
-	__skb_push(skb, skb->data - skb_transport_header(skb));
-	hdr = ipv6_hdr(skb);
-
-	if (hdr->nexthdr != IPPROTO_ICMPV6)
-		return false;
-	if (hdr->hop_limit != 255)
-		return false;
-	if (msg->icmph.icmp6_code != 0)
-		return false;
-	if (msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)
-		return false;
-
-	return true;
-}
-
-int __netpoll_rx(struct sk_buff *skb, struct netpoll_info *npinfo)
-{
-	int proto, len, ulen, data_len;
-	int hits = 0, offset;
-	const struct iphdr *iph;
-	struct udphdr *uh;
-	struct netpoll *np, *tmp;
-	uint16_t source;
-
-	if (list_empty(&npinfo->rx_np))
-		goto out;
-
-	if (skb->dev->type != ARPHRD_ETHER)
-		goto out;
-
-	/* check if netpoll clients need ARP */
-	if (skb->protocol == htons(ETH_P_ARP) && atomic_read(&trapped)) {
-		skb_queue_tail(&npinfo->neigh_tx, skb);
-		return 1;
-	} else if (pkt_is_ns(skb) && atomic_read(&trapped)) {
-		skb_queue_tail(&npinfo->neigh_tx, skb);
-		return 1;
-	}
-
-	if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
-		skb = vlan_untag(skb);
-		if (unlikely(!skb))
-			goto out;
-	}
-
-	proto = ntohs(eth_hdr(skb)->h_proto);
-	if (proto != ETH_P_IP && proto != ETH_P_IPV6)
-		goto out;
-	if (skb->pkt_type == PACKET_OTHERHOST)
-		goto out;
-	if (skb_shared(skb))
-		goto out;
-
-	if (proto == ETH_P_IP) {
-		if (!pskb_may_pull(skb, sizeof(struct iphdr)))
-			goto out;
-		iph = (struct iphdr *)skb->data;
-		if (iph->ihl < 5 || iph->version != 4)
-			goto out;
-		if (!pskb_may_pull(skb, iph->ihl*4))
-			goto out;
-		iph = (struct iphdr *)skb->data;
-		if (ip_fast_csum((u8 *)iph, iph->ihl) != 0)
-			goto out;
-
-		len = ntohs(iph->tot_len);
-		if (skb->len < len || len < iph->ihl*4)
-			goto out;
-
-		/*
-		 * Our transport medium may have padded the buffer out.
-		 * Now We trim to the true length of the frame.
-		 */
-		if (pskb_trim_rcsum(skb, len))
-			goto out;
-
-		iph = (struct iphdr *)skb->data;
-		if (iph->protocol != IPPROTO_UDP)
-			goto out;
-
-		len -= iph->ihl*4;
-		uh = (struct udphdr *)(((char *)iph) + iph->ihl*4);
-		offset = (unsigned char *)(uh + 1) - skb->data;
-		ulen = ntohs(uh->len);
-		data_len = skb->len - offset;
-		source = ntohs(uh->source);
-
-		if (ulen != len)
-			goto out;
-		if (checksum_udp(skb, uh, ulen, iph->saddr, iph->daddr))
-			goto out;
-		list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
-			if (np->local_ip.ip && np->local_ip.ip != iph->daddr)
-				continue;
-			if (np->remote_ip.ip && np->remote_ip.ip != iph->saddr)
-				continue;
-			if (np->local_port && np->local_port != ntohs(uh->dest))
-				continue;
-
-			np->rx_skb_hook(np, source, skb, offset, data_len);
-			hits++;
-		}
-	} else {
-#if IS_ENABLED(CONFIG_IPV6)
-		const struct ipv6hdr *ip6h;
-
-		if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
-			goto out;
-		ip6h = (struct ipv6hdr *)skb->data;
-		if (ip6h->version != 6)
-			goto out;
-		len = ntohs(ip6h->payload_len);
-		if (!len)
-			goto out;
-		if (len + sizeof(struct ipv6hdr) > skb->len)
-			goto out;
-		if (pskb_trim_rcsum(skb, len + sizeof(struct ipv6hdr)))
-			goto out;
-		ip6h = ipv6_hdr(skb);
-		if (!pskb_may_pull(skb, sizeof(struct udphdr)))
-			goto out;
-		uh = udp_hdr(skb);
-		offset = (unsigned char *)(uh + 1) - skb->data;
-		ulen = ntohs(uh->len);
-		data_len = skb->len - offset;
-		source = ntohs(uh->source);
-		if (ulen != skb->len)
-			goto out;
-		if (udp6_csum_init(skb, uh, IPPROTO_UDP))
-			goto out;
-		list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
-			if (!ipv6_addr_equal(&np->local_ip.in6, &ip6h->daddr))
-				continue;
-			if (!ipv6_addr_equal(&np->remote_ip.in6, &ip6h->saddr))
-				continue;
-			if (np->local_port && np->local_port != ntohs(uh->dest))
-				continue;
-
-			np->rx_skb_hook(np, source, skb, offset, data_len);
-			hits++;
-		}
-#endif
-	}
-
-	if (!hits)
-		goto out;
-
-	kfree_skb(skb);
-	return 1;
-
-out:
-	if (atomic_read(&trapped)) {
-		kfree_skb(skb);
-		return 1;
-	}
-
-	return 0;
-}
-
 void netpoll_print_options(struct netpoll *np)
 {
 	np_info(np, "local port %d\n", np->local_port);
@@ -1026,11 +595,10 @@ int netpoll_parse_options(struct netpoll *np, char *opt)
 }
 EXPORT_SYMBOL(netpoll_parse_options);
 
-int __netpoll_setup(struct netpoll *np, struct net_device *ndev, gfp_t gfp)
+int __netpoll_setup(struct netpoll *np, struct net_device *ndev)
 {
 	struct netpoll_info *npinfo;
 	const struct net_device_ops *ops;
-	unsigned long flags;
 	int err;
 
 	np->dev = ndev;
@@ -1046,18 +614,13 @@ int __netpoll_setup(struct netpoll *np, struct net_device *ndev, gfp_t gfp)
 	}
 
 	if (!ndev->npinfo) {
-		npinfo = kmalloc(sizeof(*npinfo), gfp);
+		npinfo = kmalloc(sizeof(*npinfo), GFP_KERNEL);
 		if (!npinfo) {
 			err = -ENOMEM;
 			goto out;
 		}
 
-		npinfo->rx_flags = 0;
-		INIT_LIST_HEAD(&npinfo->rx_np);
-
-		spin_lock_init(&npinfo->rx_lock);
 		sema_init(&npinfo->dev_lock, 1);
-		skb_queue_head_init(&npinfo->neigh_tx);
 		skb_queue_head_init(&npinfo->txq);
 		INIT_DELAYED_WORK(&npinfo->tx_work, queue_process);
 
@@ -1065,7 +628,7 @@ int __netpoll_setup(struct netpoll *np, struct net_device *ndev, gfp_t gfp)
 
 		ops = np->dev->netdev_ops;
 		if (ops->ndo_netpoll_setup) {
-			err = ops->ndo_netpoll_setup(ndev, npinfo, gfp);
+			err = ops->ndo_netpoll_setup(ndev, npinfo);
 			if (err)
 				goto free_npinfo;
 		}
@@ -1076,13 +639,6 @@ int __netpoll_setup(struct netpoll *np, struct net_device *ndev, gfp_t gfp)
 
 	npinfo->netpoll = np;
 
-	if (np->rx_skb_hook) {
-		spin_lock_irqsave(&npinfo->rx_lock, flags);
-		npinfo->rx_flags |= NETPOLL_RX_ENABLED;
-		list_add_tail(&np->rx, &npinfo->rx_np);
-		spin_unlock_irqrestore(&npinfo->rx_lock, flags);
-	}
-
 	/* last thing to do is link it to the net device structure */
 	rcu_assign_pointer(ndev->npinfo, npinfo);
 
@@ -1204,7 +760,7 @@ int netpoll_setup(struct netpoll *np)
 	/* fill up the skb queue */
 	refill_skbs();
 
-	err = __netpoll_setup(np, ndev, GFP_KERNEL);
+	err = __netpoll_setup(np, ndev);
 	if (err)
 		goto put;
 
@@ -1231,7 +787,6 @@ static void rcu_cleanup_netpoll_info(struct rcu_head *rcu_head)
 	struct netpoll_info *npinfo =
 			container_of(rcu_head, struct netpoll_info, rcu);
 
-	skb_queue_purge(&npinfo->neigh_tx);
 	skb_queue_purge(&npinfo->txq);
 
 	/* we can't call cancel_delayed_work_sync here, as we are in softirq */
@@ -1247,7 +802,6 @@ static void rcu_cleanup_netpoll_info(struct rcu_head *rcu_head)
 void __netpoll_cleanup(struct netpoll *np)
 {
 	struct netpoll_info *npinfo;
-	unsigned long flags;
 
 	/* rtnl_dereference would be preferable here but
 	 * rcu_cleanup_netpoll path can put us in here safely without
@@ -1257,14 +811,6 @@ void __netpoll_cleanup(struct netpoll *np)
 	if (!npinfo)
 		return;
 
-	if (!list_empty(&npinfo->rx_np)) {
-		spin_lock_irqsave(&npinfo->rx_lock, flags);
-		list_del(&np->rx);
-		if (list_empty(&npinfo->rx_np))
-			npinfo->rx_flags &= ~NETPOLL_RX_ENABLED;
-		spin_unlock_irqrestore(&npinfo->rx_lock, flags);
-	}
-
 	synchronize_srcu(&netpoll_srcu);
 
 	if (atomic_dec_and_test(&npinfo->refcnt)) {
@@ -1274,7 +820,7 @@ void __netpoll_cleanup(struct netpoll *np)
 		if (ops->ndo_netpoll_cleanup)
 			ops->ndo_netpoll_cleanup(np->dev);
 
-		rcu_assign_pointer(np->dev->npinfo, NULL);
+		RCU_INIT_POINTER(np->dev->npinfo, NULL);
 		call_rcu_bh(&npinfo->rcu, rcu_cleanup_netpoll_info);
 	}
 }
@@ -1308,18 +854,3 @@ out:
 	rtnl_unlock();
 }
 EXPORT_SYMBOL(netpoll_cleanup);
-
-int netpoll_trap(void)
-{
-	return atomic_read(&trapped);
-}
-EXPORT_SYMBOL(netpoll_trap);
-
-void netpoll_set_trap(int trap)
-{
-	if (trap)
-		atomic_inc(&trapped);
-	else
-		atomic_dec(&trapped);
-}
-EXPORT_SYMBOL(netpoll_set_trap);
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index fdac61cac1bd..d0dac57291af 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -476,23 +476,22 @@ static int pgctrl_show(struct seq_file *seq, void *v)
 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
 			    size_t count, loff_t *ppos)
 {
-	int err = 0;
 	char data[128];
 	struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
 
-	if (!capable(CAP_NET_ADMIN)) {
-		err = -EPERM;
-		goto out;
-	}
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (count == 0)
+		return -EINVAL;
 
 	if (count > sizeof(data))
 		count = sizeof(data);
 
-	if (copy_from_user(data, buf, count)) {
-		err = -EFAULT;
-		goto out;
-	}
-	data[count - 1] = 0;	/* Make string */
+	if (copy_from_user(data, buf, count))
+		return -EFAULT;
+
+	data[count - 1] = 0;	/* Strip trailing '\n' and terminate string */
 
 	if (!strcmp(data, "stop"))
 		pktgen_stop_all_threads_ifs(pn);
@@ -506,10 +505,7 @@ static ssize_t pgctrl_write(struct file *file, const char __user *buf,
 	else
 		pr_warning("Unknown command: %s\n", data);
 
-	err = count;
-
-out:
-	return err;
+	return count;
 }
 
 static int pgctrl_open(struct inode *inode, struct file *file)
@@ -1251,7 +1247,13 @@ static ssize_t pktgen_if_write(struct file *file,
 				"Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
 				f,
 				"IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
-				"MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
+				"MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
+				"MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
+				"QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
+#ifdef CONFIG_XFRM
+				"IPSEC, "
+#endif
+				"NODE_ALLOC\n");
 			return count;
 		}
 		sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
diff --git a/net/core/ptp_classifier.c b/net/core/ptp_classifier.c
new file mode 100644
index 000000000000..eaba0f68f860
--- /dev/null
+++ b/net/core/ptp_classifier.c
@@ -0,0 +1,141 @@
+/* PTP classifier
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+/* The below program is the bpf_asm (tools/net/) representation of
+ * the opcode array in the ptp_filter structure.
+ *
+ * For convenience, this can easily be altered and reviewed with
+ * bpf_asm and bpf_dbg, e.g. `./bpf_asm -c prog` where prog is a
+ * simple file containing the below program:
+ *
+ * ldh [12]                        ; load ethertype
+ *
+ * ; PTP over UDP over IPv4 over Ethernet
+ * test_ipv4:
+ *   jneq #0x800, test_ipv6        ; ETH_P_IP ?
+ *   ldb [23]                      ; load proto
+ *   jneq #17, drop_ipv4           ; IPPROTO_UDP ?
+ *   ldh [20]                      ; load frag offset field
+ *   jset #0x1fff, drop_ipv4       ; don't allow fragments
+ *   ldxb 4*([14]&0xf)             ; load IP header len
+ *   ldh [x + 16]                  ; load UDP dst port
+ *   jneq #319, drop_ipv4          ; is port PTP_EV_PORT ?
+ *   ldh [x + 22]                  ; load payload
+ *   and #0xf                      ; mask PTP_CLASS_VMASK
+ *   or #0x10                      ; PTP_CLASS_IPV4
+ *   ret a                         ; return PTP class
+ *   drop_ipv4: ret #0x0           ; PTP_CLASS_NONE
+ *
+ * ; PTP over UDP over IPv6 over Ethernet
+ * test_ipv6:
+ *   jneq #0x86dd, test_8021q      ; ETH_P_IPV6 ?
+ *   ldb [20]                      ; load proto
+ *   jneq #17, drop_ipv6           ; IPPROTO_UDP ?
+ *   ldh [56]                      ; load UDP dst port
+ *   jneq #319, drop_ipv6          ; is port PTP_EV_PORT ?
+ *   ldh [62]                      ; load payload
+ *   and #0xf                      ; mask PTP_CLASS_VMASK
+ *   or #0x20                      ; PTP_CLASS_IPV6
+ *   ret a                         ; return PTP class
+ *   drop_ipv6: ret #0x0           ; PTP_CLASS_NONE
+ *
+ * ; PTP over 802.1Q over Ethernet
+ * test_8021q:
+ *   jneq #0x8100, test_ieee1588   ; ETH_P_8021Q ?
+ *   ldh [16]                      ; load inner type
+ *   jneq #0x88f7, drop_ieee1588   ; ETH_P_1588 ?
+ *   ldb [18]                      ; load payload
+ *   and #0x8                      ; as we don't have ports here, test
+ *   jneq #0x0, drop_ieee1588      ; for PTP_GEN_BIT and drop these
+ *   ldh [18]                      ; reload payload
+ *   and #0xf                      ; mask PTP_CLASS_VMASK
+ *   or #0x40                      ; PTP_CLASS_V2_VLAN
+ *   ret a                         ; return PTP class
+ *
+ * ; PTP over Ethernet
+ * test_ieee1588:
+ *   jneq #0x88f7, drop_ieee1588   ; ETH_P_1588 ?
+ *   ldb [14]                      ; load payload
+ *   and #0x8                      ; as we don't have ports here, test
+ *   jneq #0x0, drop_ieee1588      ; for PTP_GEN_BIT and drop these
+ *   ldh [14]                      ; reload payload
+ *   and #0xf                      ; mask PTP_CLASS_VMASK
+ *   or #0x30                      ; PTP_CLASS_L2
+ *   ret a                         ; return PTP class
+ *   drop_ieee1588: ret #0x0       ; PTP_CLASS_NONE
+ */
+
+#include <linux/skbuff.h>
+#include <linux/filter.h>
+#include <linux/ptp_classify.h>
+
+static struct sk_filter *ptp_insns __read_mostly;
+
+unsigned int ptp_classify_raw(const struct sk_buff *skb)
+{
+	return SK_RUN_FILTER(ptp_insns, skb);
+}
+EXPORT_SYMBOL_GPL(ptp_classify_raw);
+
+void __init ptp_classifier_init(void)
+{
+	static struct sock_filter ptp_filter[] = {
+		{ 0x28,  0,  0, 0x0000000c },
+		{ 0x15,  0, 12, 0x00000800 },
+		{ 0x30,  0,  0, 0x00000017 },
+		{ 0x15,  0,  9, 0x00000011 },
+		{ 0x28,  0,  0, 0x00000014 },
+		{ 0x45,  7,  0, 0x00001fff },
+		{ 0xb1,  0,  0, 0x0000000e },
+		{ 0x48,  0,  0, 0x00000010 },
+		{ 0x15,  0,  4, 0x0000013f },
+		{ 0x48,  0,  0, 0x00000016 },
+		{ 0x54,  0,  0, 0x0000000f },
+		{ 0x44,  0,  0, 0x00000010 },
+		{ 0x16,  0,  0, 0x00000000 },
+		{ 0x06,  0,  0, 0x00000000 },
+		{ 0x15,  0,  9, 0x000086dd },
+		{ 0x30,  0,  0, 0x00000014 },
+		{ 0x15,  0,  6, 0x00000011 },
+		{ 0x28,  0,  0, 0x00000038 },
+		{ 0x15,  0,  4, 0x0000013f },
+		{ 0x28,  0,  0, 0x0000003e },
+		{ 0x54,  0,  0, 0x0000000f },
+		{ 0x44,  0,  0, 0x00000020 },
+		{ 0x16,  0,  0, 0x00000000 },
+		{ 0x06,  0,  0, 0x00000000 },
+		{ 0x15,  0,  9, 0x00008100 },
+		{ 0x28,  0,  0, 0x00000010 },
+		{ 0x15,  0, 15, 0x000088f7 },
+		{ 0x30,  0,  0, 0x00000012 },
+		{ 0x54,  0,  0, 0x00000008 },
+		{ 0x15,  0, 12, 0x00000000 },
+		{ 0x28,  0,  0, 0x00000012 },
+		{ 0x54,  0,  0, 0x0000000f },
+		{ 0x44,  0,  0, 0x00000040 },
+		{ 0x16,  0,  0, 0x00000000 },
+		{ 0x15,  0,  7, 0x000088f7 },
+		{ 0x30,  0,  0, 0x0000000e },
+		{ 0x54,  0,  0, 0x00000008 },
+		{ 0x15,  0,  4, 0x00000000 },
+		{ 0x28,  0,  0, 0x0000000e },
+		{ 0x54,  0,  0, 0x0000000f },
+		{ 0x44,  0,  0, 0x00000030 },
+		{ 0x16,  0,  0, 0x00000000 },
+		{ 0x06,  0,  0, 0x00000000 },
+	};
+	struct sock_fprog ptp_prog = {
+		.len = ARRAY_SIZE(ptp_filter), .filter = ptp_filter,
+	};
+
+	BUG_ON(sk_unattached_filter_create(&ptp_insns, &ptp_prog));
+}
diff --git a/net/core/request_sock.c b/net/core/request_sock.c
index 4425148d2b51..467f326126e0 100644
--- a/net/core/request_sock.c
+++ b/net/core/request_sock.c
@@ -221,5 +221,4 @@ void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
 out:
 	spin_unlock_bh(&fastopenq->lock);
 	sock_put(lsk);
-	return;
 }
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 120eecc0f5a4..d4ff41739b0f 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -822,6 +822,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
 	       + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
 	       + nla_total_size(1) /* IFLA_OPERSTATE */
 	       + nla_total_size(1) /* IFLA_LINKMODE */
+	       + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
 	       + nla_total_size(ext_filter_mask
 			        & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
 	       + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
@@ -970,7 +971,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 	    (dev->qdisc &&
 	     nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
 	    (dev->ifalias &&
-	     nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
+	     nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
+	    nla_put_u32(skb, IFLA_CARRIER_CHANGES,
+			atomic_read(&dev->carrier_changes)))
 		goto nla_put_failure;
 
 	if (1) {
@@ -1121,56 +1124,7 @@ nla_put_failure:
 	return -EMSGSIZE;
 }
 
-static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
-{
-	struct net *net = sock_net(skb->sk);
-	int h, s_h;
-	int idx = 0, s_idx;
-	struct net_device *dev;
-	struct hlist_head *head;
-	struct nlattr *tb[IFLA_MAX+1];
-	u32 ext_filter_mask = 0;
-
-	s_h = cb->args[0];
-	s_idx = cb->args[1];
-
-	rcu_read_lock();
-	cb->seq = net->dev_base_seq;
-
-	if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
-			ifla_policy) >= 0) {
-
-		if (tb[IFLA_EXT_MASK])
-			ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
-	}
-
-	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
-		idx = 0;
-		head = &net->dev_index_head[h];
-		hlist_for_each_entry_rcu(dev, head, index_hlist) {
-			if (idx < s_idx)
-				goto cont;
-			if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
-					     NETLINK_CB(cb->skb).portid,
-					     cb->nlh->nlmsg_seq, 0,
-					     NLM_F_MULTI,
-					     ext_filter_mask) <= 0)
-				goto out;
-
-			nl_dump_check_consistent(cb, nlmsg_hdr(skb));
-cont:
-			idx++;
-		}
-	}
-out:
-	rcu_read_unlock();
-	cb->args[1] = idx;
-	cb->args[0] = h;
-
-	return skb->len;
-}
-
-const struct nla_policy ifla_policy[IFLA_MAX+1] = {
+static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
 	[IFLA_IFNAME]		= { .type = NLA_STRING, .len = IFNAMSIZ-1 },
 	[IFLA_ADDRESS]		= { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
 	[IFLA_BROADCAST]	= { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
@@ -1196,8 +1150,8 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
 	[IFLA_NUM_TX_QUEUES]	= { .type = NLA_U32 },
 	[IFLA_NUM_RX_QUEUES]	= { .type = NLA_U32 },
 	[IFLA_PHYS_PORT_ID]	= { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
+	[IFLA_CARRIER_CHANGES]	= { .type = NLA_U32 },  /* ignored */
 };
-EXPORT_SYMBOL(ifla_policy);
 
 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
 	[IFLA_INFO_KIND]	= { .type = NLA_STRING },
@@ -1235,6 +1189,61 @@ static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
 	[IFLA_PORT_RESPONSE]	= { .type = NLA_U16, },
 };
 
+static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct net *net = sock_net(skb->sk);
+	int h, s_h;
+	int idx = 0, s_idx;
+	struct net_device *dev;
+	struct hlist_head *head;
+	struct nlattr *tb[IFLA_MAX+1];
+	u32 ext_filter_mask = 0;
+
+	s_h = cb->args[0];
+	s_idx = cb->args[1];
+
+	rcu_read_lock();
+	cb->seq = net->dev_base_seq;
+
+	if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
+			ifla_policy) >= 0) {
+
+		if (tb[IFLA_EXT_MASK])
+			ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
+	}
+
+	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
+		idx = 0;
+		head = &net->dev_index_head[h];
+		hlist_for_each_entry_rcu(dev, head, index_hlist) {
+			if (idx < s_idx)
+				goto cont;
+			if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
+					     NETLINK_CB(cb->skb).portid,
+					     cb->nlh->nlmsg_seq, 0,
+					     NLM_F_MULTI,
+					     ext_filter_mask) <= 0)
+				goto out;
+
+			nl_dump_check_consistent(cb, nlmsg_hdr(skb));
+cont:
+			idx++;
+		}
+	}
+out:
+	rcu_read_unlock();
+	cb->args[1] = idx;
+	cb->args[0] = h;
+
+	return skb->len;
+}
+
+int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
+{
+	return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
+}
+EXPORT_SYMBOL(rtnl_nla_parse_ifla);
+
 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
 {
 	struct net *net;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 90b96a11b974..30c7d35dd862 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3300,6 +3300,32 @@ __skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset, int len)
 	return elt;
 }
 
+/* As compared with skb_to_sgvec, skb_to_sgvec_nomark only map skb to given
+ * sglist without mark the sg which contain last skb data as the end.
+ * So the caller can mannipulate sg list as will when padding new data after
+ * the first call without calling sg_unmark_end to expend sg list.
+ *
+ * Scenario to use skb_to_sgvec_nomark:
+ * 1. sg_init_table
+ * 2. skb_to_sgvec_nomark(payload1)
+ * 3. skb_to_sgvec_nomark(payload2)
+ *
+ * This is equivalent to:
+ * 1. sg_init_table
+ * 2. skb_to_sgvec(payload1)
+ * 3. sg_unmark_end
+ * 4. skb_to_sgvec(payload2)
+ *
+ * When mapping mutilple payload conditionally, skb_to_sgvec_nomark
+ * is more preferable.
+ */
+int skb_to_sgvec_nomark(struct sk_buff *skb, struct scatterlist *sg,
+			int offset, int len)
+{
+	return __skb_to_sgvec(skb, sg, offset, len);
+}
+EXPORT_SYMBOL_GPL(skb_to_sgvec_nomark);
+
 int skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset, int len)
 {
 	int nsg = __skb_to_sgvec(skb, sg, offset, len);
@@ -3562,15 +3588,47 @@ static int skb_maybe_pull_tail(struct sk_buff *skb, unsigned int len,
 	return 0;
 }
 
+#define MAX_TCP_HDR_LEN (15 * 4)
+
+static __sum16 *skb_checksum_setup_ip(struct sk_buff *skb,
+				      typeof(IPPROTO_IP) proto,
+				      unsigned int off)
+{
+	switch (proto) {
+		int err;
+
+	case IPPROTO_TCP:
+		err = skb_maybe_pull_tail(skb, off + sizeof(struct tcphdr),
+					  off + MAX_TCP_HDR_LEN);
+		if (!err && !skb_partial_csum_set(skb, off,
+						  offsetof(struct tcphdr,
+							   check)))
+			err = -EPROTO;
+		return err ? ERR_PTR(err) : &tcp_hdr(skb)->check;
+
+	case IPPROTO_UDP:
+		err = skb_maybe_pull_tail(skb, off + sizeof(struct udphdr),
+					  off + sizeof(struct udphdr));
+		if (!err && !skb_partial_csum_set(skb, off,
+						  offsetof(struct udphdr,
+							   check)))
+			err = -EPROTO;
+		return err ? ERR_PTR(err) : &udp_hdr(skb)->check;
+	}
+
+	return ERR_PTR(-EPROTO);
+}
+
 /* This value should be large enough to cover a tagged ethernet header plus
  * maximally sized IP and TCP or UDP headers.
  */
 #define MAX_IP_HDR_LEN 128
 
-static int skb_checksum_setup_ip(struct sk_buff *skb, bool recalculate)
+static int skb_checksum_setup_ipv4(struct sk_buff *skb, bool recalculate)
 {
 	unsigned int off;
 	bool fragment;
+	__sum16 *csum;
 	int err;
 
 	fragment = false;
@@ -3591,51 +3649,15 @@ static int skb_checksum_setup_ip(struct sk_buff *skb, bool recalculate)
 	if (fragment)
 		goto out;
 
-	switch (ip_hdr(skb)->protocol) {
-	case IPPROTO_TCP:
-		err = skb_maybe_pull_tail(skb,
-					  off + sizeof(struct tcphdr),
-					  MAX_IP_HDR_LEN);
-		if (err < 0)
-			goto out;
-
-		if (!skb_partial_csum_set(skb, off,
-					  offsetof(struct tcphdr, check))) {
-			err = -EPROTO;
-			goto out;
-		}
-
-		if (recalculate)
-			tcp_hdr(skb)->check =
-				~csum_tcpudp_magic(ip_hdr(skb)->saddr,
-						   ip_hdr(skb)->daddr,
-						   skb->len - off,
-						   IPPROTO_TCP, 0);
-		break;
-	case IPPROTO_UDP:
-		err = skb_maybe_pull_tail(skb,
-					  off + sizeof(struct udphdr),
-					  MAX_IP_HDR_LEN);
-		if (err < 0)
-			goto out;
-
-		if (!skb_partial_csum_set(skb, off,
-					  offsetof(struct udphdr, check))) {
-			err = -EPROTO;
-			goto out;
-		}
-
-		if (recalculate)
-			udp_hdr(skb)->check =
-				~csum_tcpudp_magic(ip_hdr(skb)->saddr,
-						   ip_hdr(skb)->daddr,
-						   skb->len - off,
-						   IPPROTO_UDP, 0);
-		break;
-	default:
-		goto out;
-	}
+	csum = skb_checksum_setup_ip(skb, ip_hdr(skb)->protocol, off);
+	if (IS_ERR(csum))
+		return PTR_ERR(csum);
 
+	if (recalculate)
+		*csum = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
+					   ip_hdr(skb)->daddr,
+					   skb->len - off,
+					   ip_hdr(skb)->protocol, 0);
 	err = 0;
 
 out:
@@ -3658,6 +3680,7 @@ static int skb_checksum_setup_ipv6(struct sk_buff *skb, bool recalculate)
 	unsigned int len;
 	bool fragment;
 	bool done;
+	__sum16 *csum;
 
 	fragment = false;
 	done = false;
@@ -3735,51 +3758,14 @@ static int skb_checksum_setup_ipv6(struct sk_buff *skb, bool recalculate)
 	if (!done || fragment)
 		goto out;
 
-	switch (nexthdr) {
-	case IPPROTO_TCP:
-		err = skb_maybe_pull_tail(skb,
-					  off + sizeof(struct tcphdr),
-					  MAX_IPV6_HDR_LEN);
-		if (err < 0)
-			goto out;
-
-		if (!skb_partial_csum_set(skb, off,
-					  offsetof(struct tcphdr, check))) {
-			err = -EPROTO;
-			goto out;
-		}
-
-		if (recalculate)
-			tcp_hdr(skb)->check =
-				~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
-						 &ipv6_hdr(skb)->daddr,
-						 skb->len - off,
-						 IPPROTO_TCP, 0);
-		break;
-	case IPPROTO_UDP:
-		err = skb_maybe_pull_tail(skb,
-					  off + sizeof(struct udphdr),
-					  MAX_IPV6_HDR_LEN);
-		if (err < 0)
-			goto out;
-
-		if (!skb_partial_csum_set(skb, off,
-					  offsetof(struct udphdr, check))) {
-			err = -EPROTO;
-			goto out;
-		}
-
-		if (recalculate)
-			udp_hdr(skb)->check =
-				~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
-						 &ipv6_hdr(skb)->daddr,
-						 skb->len - off,
-						 IPPROTO_UDP, 0);
-		break;
-	default:
-		goto out;
-	}
+	csum = skb_checksum_setup_ip(skb, nexthdr, off);
+	if (IS_ERR(csum))
+		return PTR_ERR(csum);
 
+	if (recalculate)
+		*csum = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
+					 &ipv6_hdr(skb)->daddr,
+					 skb->len - off, nexthdr, 0);
 	err = 0;
 
 out:
@@ -3797,7 +3783,7 @@ int skb_checksum_setup(struct sk_buff *skb, bool recalculate)
 
 	switch (skb->protocol) {
 	case htons(ETH_P_IP):
-		err = skb_checksum_setup_ip(skb, recalculate);
+		err = skb_checksum_setup_ipv4(skb, recalculate);
 		break;
 
 	case htons(ETH_P_IPV6):
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index a0e9cf6379de..d7af18859322 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -52,9 +52,10 @@ EXPORT_SYMBOL_GPL(sock_diag_put_meminfo);
 int sock_diag_put_filterinfo(struct user_namespace *user_ns, struct sock *sk,
 			     struct sk_buff *skb, int attrtype)
 {
-	struct nlattr *attr;
+	struct sock_fprog_kern *fprog;
 	struct sk_filter *filter;
-	unsigned int len;
+	struct nlattr *attr;
+	unsigned int flen;
 	int err = 0;
 
 	if (!ns_capable(user_ns, CAP_NET_ADMIN)) {
@@ -63,24 +64,20 @@ int sock_diag_put_filterinfo(struct user_namespace *user_ns, struct sock *sk,
 	}
 
 	rcu_read_lock();
-
 	filter = rcu_dereference(sk->sk_filter);
-	len = filter ? filter->len * sizeof(struct sock_filter) : 0;
+	if (!filter)
+		goto out;
 
-	attr = nla_reserve(skb, attrtype, len);
+	fprog = filter->orig_prog;
+	flen = sk_filter_proglen(fprog);
+
+	attr = nla_reserve(skb, attrtype, flen);
 	if (attr == NULL) {
 		err = -EMSGSIZE;
 		goto out;
 	}
 
-	if (filter) {
-		struct sock_filter *fb = (struct sock_filter *)nla_data(attr);
-		int i;
-
-		for (i = 0; i < filter->len; i++, fb++)
-			sk_decode_filter(&filter->insns[i], fb);
-	}
-
+	memcpy(nla_data(attr), fprog->filter, flen);
 out:
 	rcu_read_unlock();
 	return err;
diff --git a/net/core/timestamping.c b/net/core/timestamping.c
index 661b5a40ec10..6521dfd8b7c8 100644
--- a/net/core/timestamping.c
+++ b/net/core/timestamping.c
@@ -23,16 +23,11 @@
 #include <linux/skbuff.h>
 #include <linux/export.h>
 
-static struct sock_filter ptp_filter[] = {
-	PTP_FILTER
-};
-
 static unsigned int classify(const struct sk_buff *skb)
 {
-	if (likely(skb->dev &&
-		   skb->dev->phydev &&
+	if (likely(skb->dev && skb->dev->phydev &&
 		   skb->dev->phydev->drv))
-		return sk_run_filter(skb, ptp_filter);
+		return ptp_classify_raw(skb);
 	else
 		return PTP_CLASS_NONE;
 }
@@ -60,11 +55,13 @@ void skb_clone_tx_timestamp(struct sk_buff *skb)
 		if (likely(phydev->drv->txtstamp)) {
 			if (!atomic_inc_not_zero(&sk->sk_refcnt))
 				return;
+
 			clone = skb_clone(skb, GFP_ATOMIC);
 			if (!clone) {
 				sock_put(sk);
 				return;
 			}
+
 			clone->sk = sk;
 			phydev->drv->txtstamp(phydev, clone, type);
 		}
@@ -89,12 +86,15 @@ void skb_complete_tx_timestamp(struct sk_buff *skb,
 	}
 
 	*skb_hwtstamps(skb) = *hwtstamps;
+
 	serr = SKB_EXT_ERR(skb);
 	memset(serr, 0, sizeof(*serr));
 	serr->ee.ee_errno = ENOMSG;
 	serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
 	skb->sk = NULL;
+
 	err = sock_queue_err_skb(sk, skb);
+
 	sock_put(sk);
 	if (err)
 		kfree_skb(skb);
@@ -132,8 +132,3 @@ bool skb_defer_rx_timestamp(struct sk_buff *skb)
 	return false;
 }
 EXPORT_SYMBOL_GPL(skb_defer_rx_timestamp);
-
-void __init skb_timestamping_init(void)
-{
-	BUG_ON(sk_chk_filter(ptp_filter, ARRAY_SIZE(ptp_filter)));
-}