Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

50 files changed, 18535 insertions, 0 deletions

diff --git a/kernel/net/bridge/Kconfig b/kernel/net/bridge/Kconfig
new file mode 100644
index 000000000..aa0d3b2f1
--- /dev/null
+++ b/kernel/net/bridge/Kconfig
@@ -0,0 +1,62 @@
+#
+# 802.1d Ethernet Bridging
+#
+
+config BRIDGE
+	tristate "802.1d Ethernet Bridging"
+	select LLC
+	select STP
+	depends on IPV6 || IPV6=n
+	---help---
+	  If you say Y here, then your Linux box will be able to act as an
+	  Ethernet bridge, which means that the different Ethernet segments it
+	  is connected to will appear as one Ethernet to the participants.
+	  Several such bridges can work together to create even larger
+	  networks of Ethernets using the IEEE 802.1 spanning tree algorithm.
+	  As this is a standard, Linux bridges will cooperate properly with
+	  other third party bridge products.
+
+	  In order to use the Ethernet bridge, you'll need the bridge
+	  configuration tools; see <file:Documentation/networking/bridge.txt>
+	  for location. Please read the Bridge mini-HOWTO for more
+	  information.
+
+	  If you enable iptables support along with the bridge support then you
+	  turn your bridge into a bridging IP firewall.
+	  iptables will then see the IP packets being bridged, so you need to
+	  take this into account when setting up your firewall rules.
+	  Enabling arptables support when bridging will let arptables see
+	  bridged ARP traffic in the arptables FORWARD chain.
+
+	  To compile this code as a module, choose M here: the module
+	  will be called bridge.
+
+	  If unsure, say N.
+
+config BRIDGE_IGMP_SNOOPING
+	bool "IGMP/MLD snooping"
+	depends on BRIDGE
+	depends on INET
+	default y
+	---help---
+	  If you say Y here, then the Ethernet bridge will be able selectively
+	  forward multicast traffic based on IGMP/MLD traffic received from
+	  each port.
+
+	  Say N to exclude this support and reduce the binary size.
+
+	  If unsure, say Y.
+
+config BRIDGE_VLAN_FILTERING
+	bool "VLAN filtering"
+	depends on BRIDGE
+	depends on VLAN_8021Q
+	default n
+	---help---
+	  If you say Y here, then the Ethernet bridge will be able selectively
+	  receive and forward traffic based on VLAN information in the packet
+	  any VLAN information configured on the bridge port or bridge device.
+
+	  Say N to exclude this support and reduce the binary size.
+
+	  If unsure, say Y.
diff --git a/kernel/net/bridge/Makefile b/kernel/net/bridge/Makefile
new file mode 100644
index 000000000..fd7ee03c5
--- /dev/null
+++ b/kernel/net/bridge/Makefile
@@ -0,0 +1,21 @@
+#
+# Makefile for the IEEE 802.1d ethernet bridging layer.
+#
+
+obj-$(CONFIG_BRIDGE) += bridge.o
+
+bridge-y	:= br.o br_device.o br_fdb.o br_forward.o br_if.o br_input.o \
+			br_ioctl.o br_stp.o br_stp_bpdu.o \
+			br_stp_if.o br_stp_timer.o br_netlink.o
+
+bridge-$(CONFIG_SYSFS) += br_sysfs_if.o br_sysfs_br.o
+
+bridge-$(subst m,y,$(CONFIG_BRIDGE_NETFILTER)) += br_nf_core.o
+
+obj-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o
+
+bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o
+
+bridge-$(CONFIG_BRIDGE_VLAN_FILTERING) += br_vlan.o
+
+obj-$(CONFIG_NETFILTER) += netfilter/
diff --git a/kernel/net/bridge/br.c b/kernel/net/bridge/br.c
new file mode 100644
index 000000000..02c24cf63
--- /dev/null
+++ b/kernel/net/bridge/br.c
@@ -0,0 +1,274 @@
+/*
+ *	Generic parts
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/llc.h>
+#include <net/llc.h>
+#include <net/stp.h>
+#include <net/switchdev.h>
+
+#include "br_private.h"
+
+/*
+ * Handle changes in state of network devices enslaved to a bridge.
+ *
+ * Note: don't care about up/down if bridge itself is down, because
+ *     port state is checked when bridge is brought up.
+ */
+static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+	struct net_bridge_port *p;
+	struct net_bridge *br;
+	bool changed_addr;
+	int err;
+
+	/* register of bridge completed, add sysfs entries */
+	if ((dev->priv_flags & IFF_EBRIDGE) && event == NETDEV_REGISTER) {
+		br_sysfs_addbr(dev);
+		return NOTIFY_DONE;
+	}
+
+	/* not a port of a bridge */
+	p = br_port_get_rtnl(dev);
+	if (!p)
+		return NOTIFY_DONE;
+
+	br = p->br;
+
+	switch (event) {
+	case NETDEV_CHANGEMTU:
+		dev_set_mtu(br->dev, br_min_mtu(br));
+		break;
+
+	case NETDEV_CHANGEADDR:
+		spin_lock_bh(&br->lock);
+		br_fdb_changeaddr(p, dev->dev_addr);
+		changed_addr = br_stp_recalculate_bridge_id(br);
+		spin_unlock_bh(&br->lock);
+
+		if (changed_addr)
+			call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
+
+		break;
+
+	case NETDEV_CHANGE:
+		br_port_carrier_check(p);
+		break;
+
+	case NETDEV_FEAT_CHANGE:
+		netdev_update_features(br->dev);
+		break;
+
+	case NETDEV_DOWN:
+		spin_lock_bh(&br->lock);
+		if (br->dev->flags & IFF_UP)
+			br_stp_disable_port(p);
+		spin_unlock_bh(&br->lock);
+		break;
+
+	case NETDEV_UP:
+		if (netif_running(br->dev) && netif_oper_up(dev)) {
+			spin_lock_bh(&br->lock);
+			br_stp_enable_port(p);
+			spin_unlock_bh(&br->lock);
+		}
+		break;
+
+	case NETDEV_UNREGISTER:
+		br_del_if(br, dev);
+		break;
+
+	case NETDEV_CHANGENAME:
+		err = br_sysfs_renameif(p);
+		if (err)
+			return notifier_from_errno(err);
+		break;
+
+	case NETDEV_PRE_TYPE_CHANGE:
+		/* Forbid underlaying device to change its type. */
+		return NOTIFY_BAD;
+
+	case NETDEV_RESEND_IGMP:
+		/* Propagate to master device */
+		call_netdevice_notifiers(event, br->dev);
+		break;
+	}
+
+	/* Events that may cause spanning tree to refresh */
+	if (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
+	    event == NETDEV_CHANGE || event == NETDEV_DOWN)
+		br_ifinfo_notify(RTM_NEWLINK, p);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block br_device_notifier = {
+	.notifier_call = br_device_event
+};
+
+static int br_netdev_switch_event(struct notifier_block *unused,
+				  unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_switch_notifier_info_to_dev(ptr);
+	struct net_bridge_port *p;
+	struct net_bridge *br;
+	struct netdev_switch_notifier_fdb_info *fdb_info;
+	int err = NOTIFY_DONE;
+
+	rtnl_lock();
+	p = br_port_get_rtnl(dev);
+	if (!p)
+		goto out;
+
+	br = p->br;
+
+	switch (event) {
+	case NETDEV_SWITCH_FDB_ADD:
+		fdb_info = ptr;
+		err = br_fdb_external_learn_add(br, p, fdb_info->addr,
+						fdb_info->vid);
+		if (err)
+			err = notifier_from_errno(err);
+		break;
+	case NETDEV_SWITCH_FDB_DEL:
+		fdb_info = ptr;
+		err = br_fdb_external_learn_del(br, p, fdb_info->addr,
+						fdb_info->vid);
+		if (err)
+			err = notifier_from_errno(err);
+		break;
+	}
+
+out:
+	rtnl_unlock();
+	return err;
+}
+
+static struct notifier_block br_netdev_switch_notifier = {
+	.notifier_call = br_netdev_switch_event,
+};
+
+static void __net_exit br_net_exit(struct net *net)
+{
+	struct net_device *dev;
+	LIST_HEAD(list);
+
+	rtnl_lock();
+	for_each_netdev(net, dev)
+		if (dev->priv_flags & IFF_EBRIDGE)
+			br_dev_delete(dev, &list);
+
+	unregister_netdevice_many(&list);
+	rtnl_unlock();
+
+}
+
+static struct pernet_operations br_net_ops = {
+	.exit	= br_net_exit,
+};
+
+static const struct stp_proto br_stp_proto = {
+	.rcv	= br_stp_rcv,
+};
+
+static int __init br_init(void)
+{
+	int err;
+
+	BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
+
+	err = stp_proto_register(&br_stp_proto);
+	if (err < 0) {
+		pr_err("bridge: can't register sap for STP\n");
+		return err;
+	}
+
+	err = br_fdb_init();
+	if (err)
+		goto err_out;
+
+	err = register_pernet_subsys(&br_net_ops);
+	if (err)
+		goto err_out1;
+
+	err = br_nf_core_init();
+	if (err)
+		goto err_out2;
+
+	err = register_netdevice_notifier(&br_device_notifier);
+	if (err)
+		goto err_out3;
+
+	err = register_netdev_switch_notifier(&br_netdev_switch_notifier);
+	if (err)
+		goto err_out4;
+
+	err = br_netlink_init();
+	if (err)
+		goto err_out5;
+
+	brioctl_set(br_ioctl_deviceless_stub);
+
+#if IS_ENABLED(CONFIG_ATM_LANE)
+	br_fdb_test_addr_hook = br_fdb_test_addr;
+#endif
+
+	pr_info("bridge: automatic filtering via arp/ip/ip6tables has been "
+		"deprecated. Update your scripts to load br_netfilter if you "
+		"need this.\n");
+
+	return 0;
+
+err_out5:
+	unregister_netdev_switch_notifier(&br_netdev_switch_notifier);
+err_out4:
+	unregister_netdevice_notifier(&br_device_notifier);
+err_out3:
+	br_nf_core_fini();
+err_out2:
+	unregister_pernet_subsys(&br_net_ops);
+err_out1:
+	br_fdb_fini();
+err_out:
+	stp_proto_unregister(&br_stp_proto);
+	return err;
+}
+
+static void __exit br_deinit(void)
+{
+	stp_proto_unregister(&br_stp_proto);
+	br_netlink_fini();
+	unregister_netdev_switch_notifier(&br_netdev_switch_notifier);
+	unregister_netdevice_notifier(&br_device_notifier);
+	brioctl_set(NULL);
+	unregister_pernet_subsys(&br_net_ops);
+
+	rcu_barrier(); /* Wait for completion of call_rcu()'s */
+
+	br_nf_core_fini();
+#if IS_ENABLED(CONFIG_ATM_LANE)
+	br_fdb_test_addr_hook = NULL;
+#endif
+	br_fdb_fini();
+}
+
+module_init(br_init)
+module_exit(br_deinit)
+MODULE_LICENSE("GPL");
+MODULE_VERSION(BR_VERSION);
+MODULE_ALIAS_RTNL_LINK("bridge");
diff --git a/kernel/net/bridge/br_device.c b/kernel/net/bridge/br_device.c
new file mode 100644
index 000000000..4ff77a169
--- /dev/null
+++ b/kernel/net/bridge/br_device.c
@@ -0,0 +1,399 @@
+/*
+ *	Device handling code
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/netpoll.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/list.h>
+#include <linux/netfilter_bridge.h>
+
+#include <asm/uaccess.h>
+#include "br_private.h"
+
+#define COMMON_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | \
+			 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM)
+
+const struct nf_br_ops __rcu *nf_br_ops __read_mostly;
+EXPORT_SYMBOL_GPL(nf_br_ops);
+
+/* net device transmit always called with BH disabled */
+netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	const unsigned char *dest = skb->data;
+	struct net_bridge_fdb_entry *dst;
+	struct net_bridge_mdb_entry *mdst;
+	struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
+	const struct nf_br_ops *nf_ops;
+	u16 vid = 0;
+
+	rcu_read_lock();
+	nf_ops = rcu_dereference(nf_br_ops);
+	if (nf_ops && nf_ops->br_dev_xmit_hook(skb)) {
+		rcu_read_unlock();
+		return NETDEV_TX_OK;
+	}
+
+	u64_stats_update_begin(&brstats->syncp);
+	brstats->tx_packets++;
+	brstats->tx_bytes += skb->len;
+	u64_stats_update_end(&brstats->syncp);
+
+	BR_INPUT_SKB_CB(skb)->brdev = dev;
+
+	skb_reset_mac_header(skb);
+	skb_pull(skb, ETH_HLEN);
+
+	if (!br_allowed_ingress(br, br_get_vlan_info(br), skb, &vid))
+		goto out;
+
+	if (is_broadcast_ether_addr(dest))
+		br_flood_deliver(br, skb, false);
+	else if (is_multicast_ether_addr(dest)) {
+		if (unlikely(netpoll_tx_running(dev))) {
+			br_flood_deliver(br, skb, false);
+			goto out;
+		}
+		if (br_multicast_rcv(br, NULL, skb, vid)) {
+			kfree_skb(skb);
+			goto out;
+		}
+
+		mdst = br_mdb_get(br, skb, vid);
+		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
+		    br_multicast_querier_exists(br, eth_hdr(skb)))
+			br_multicast_deliver(mdst, skb);
+		else
+			br_flood_deliver(br, skb, false);
+	} else if ((dst = __br_fdb_get(br, dest, vid)) != NULL)
+		br_deliver(dst->dst, skb);
+	else
+		br_flood_deliver(br, skb, true);
+
+out:
+	rcu_read_unlock();
+	return NETDEV_TX_OK;
+}
+
+static int br_dev_init(struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	int err;
+
+	br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
+	if (!br->stats)
+		return -ENOMEM;
+
+	err = br_vlan_init(br);
+	if (err)
+		free_percpu(br->stats);
+
+	return err;
+}
+
+static int br_dev_open(struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	netdev_update_features(dev);
+	netif_start_queue(dev);
+	br_stp_enable_bridge(br);
+	br_multicast_open(br);
+
+	return 0;
+}
+
+static void br_dev_set_multicast_list(struct net_device *dev)
+{
+}
+
+static void br_dev_change_rx_flags(struct net_device *dev, int change)
+{
+	if (change & IFF_PROMISC)
+		br_manage_promisc(netdev_priv(dev));
+}
+
+static int br_dev_stop(struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	br_stp_disable_bridge(br);
+	br_multicast_stop(br);
+
+	netif_stop_queue(dev);
+
+	return 0;
+}
+
+static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev,
+						struct rtnl_link_stats64 *stats)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	struct pcpu_sw_netstats tmp, sum = { 0 };
+	unsigned int cpu;
+
+	for_each_possible_cpu(cpu) {
+		unsigned int start;
+		const struct pcpu_sw_netstats *bstats
+			= per_cpu_ptr(br->stats, cpu);
+		do {
+			start = u64_stats_fetch_begin_irq(&bstats->syncp);
+			memcpy(&tmp, bstats, sizeof(tmp));
+		} while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
+		sum.tx_bytes   += tmp.tx_bytes;
+		sum.tx_packets += tmp.tx_packets;
+		sum.rx_bytes   += tmp.rx_bytes;
+		sum.rx_packets += tmp.rx_packets;
+	}
+
+	stats->tx_bytes   = sum.tx_bytes;
+	stats->tx_packets = sum.tx_packets;
+	stats->rx_bytes   = sum.rx_bytes;
+	stats->rx_packets = sum.rx_packets;
+
+	return stats;
+}
+
+static int br_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	if (new_mtu < 68 || new_mtu > br_min_mtu(br))
+		return -EINVAL;
+
+	dev->mtu = new_mtu;
+
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+	/* remember the MTU in the rtable for PMTU */
+	dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
+#endif
+
+	return 0;
+}
+
+/* Allow setting mac address to any valid ethernet address. */
+static int br_set_mac_address(struct net_device *dev, void *p)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	struct sockaddr *addr = p;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	spin_lock_bh(&br->lock);
+	if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
+		/* Mac address will be changed in br_stp_change_bridge_id(). */
+		br_stp_change_bridge_id(br, addr->sa_data);
+	}
+	spin_unlock_bh(&br->lock);
+
+	return 0;
+}
+
+static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+	strlcpy(info->driver, "bridge", sizeof(info->driver));
+	strlcpy(info->version, BR_VERSION, sizeof(info->version));
+	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
+	strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
+}
+
+static netdev_features_t br_fix_features(struct net_device *dev,
+	netdev_features_t features)
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	return br_features_recompute(br, features);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void br_poll_controller(struct net_device *br_dev)
+{
+}
+
+static void br_netpoll_cleanup(struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	struct net_bridge_port *p;
+
+	list_for_each_entry(p, &br->port_list, list)
+		br_netpoll_disable(p);
+}
+
+static int __br_netpoll_enable(struct net_bridge_port *p)
+{
+	struct netpoll *np;
+	int err;
+
+	np = kzalloc(sizeof(*p->np), GFP_KERNEL);
+	if (!np)
+		return -ENOMEM;
+
+	err = __netpoll_setup(np, p->dev);
+	if (err) {
+		kfree(np);
+		return err;
+	}
+
+	p->np = np;
+	return err;
+}
+
+int br_netpoll_enable(struct net_bridge_port *p)
+{
+	if (!p->br->dev->npinfo)
+		return 0;
+
+	return __br_netpoll_enable(p);
+}
+
+static int br_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	struct net_bridge_port *p;
+	int err = 0;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (!p->dev)
+			continue;
+		err = __br_netpoll_enable(p);
+		if (err)
+			goto fail;
+	}
+
+out:
+	return err;
+
+fail:
+	br_netpoll_cleanup(dev);
+	goto out;
+}
+
+void br_netpoll_disable(struct net_bridge_port *p)
+{
+	struct netpoll *np = p->np;
+
+	if (!np)
+		return;
+
+	p->np = NULL;
+
+	__netpoll_free_async(np);
+}
+
+#endif
+
+static int br_add_slave(struct net_device *dev, struct net_device *slave_dev)
+
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	return br_add_if(br, slave_dev);
+}
+
+static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	return br_del_if(br, slave_dev);
+}
+
+static const struct ethtool_ops br_ethtool_ops = {
+	.get_drvinfo    = br_getinfo,
+	.get_link	= ethtool_op_get_link,
+};
+
+static const struct net_device_ops br_netdev_ops = {
+	.ndo_open		 = br_dev_open,
+	.ndo_stop		 = br_dev_stop,
+	.ndo_init		 = br_dev_init,
+	.ndo_start_xmit		 = br_dev_xmit,
+	.ndo_get_stats64	 = br_get_stats64,
+	.ndo_set_mac_address	 = br_set_mac_address,
+	.ndo_set_rx_mode	 = br_dev_set_multicast_list,
+	.ndo_change_rx_flags	 = br_dev_change_rx_flags,
+	.ndo_change_mtu		 = br_change_mtu,
+	.ndo_do_ioctl		 = br_dev_ioctl,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_netpoll_setup	 = br_netpoll_setup,
+	.ndo_netpoll_cleanup	 = br_netpoll_cleanup,
+	.ndo_poll_controller	 = br_poll_controller,
+#endif
+	.ndo_add_slave		 = br_add_slave,
+	.ndo_del_slave		 = br_del_slave,
+	.ndo_fix_features        = br_fix_features,
+	.ndo_fdb_add		 = br_fdb_add,
+	.ndo_fdb_del		 = br_fdb_delete,
+	.ndo_fdb_dump		 = br_fdb_dump,
+	.ndo_bridge_getlink	 = br_getlink,
+	.ndo_bridge_setlink	 = br_setlink,
+	.ndo_bridge_dellink	 = br_dellink,
+};
+
+static void br_dev_free(struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	free_percpu(br->stats);
+	free_netdev(dev);
+}
+
+static struct device_type br_type = {
+	.name	= "bridge",
+};
+
+void br_dev_setup(struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	eth_hw_addr_random(dev);
+	ether_setup(dev);
+
+	dev->netdev_ops = &br_netdev_ops;
+	dev->destructor = br_dev_free;
+	dev->ethtool_ops = &br_ethtool_ops;
+	SET_NETDEV_DEVTYPE(dev, &br_type);
+	dev->tx_queue_len = 0;
+	dev->priv_flags = IFF_EBRIDGE;
+
+	dev->features = COMMON_FEATURES | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL |
+			NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
+	dev->hw_features = COMMON_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
+			   NETIF_F_HW_VLAN_STAG_TX;
+	dev->vlan_features = COMMON_FEATURES;
+
+	br->dev = dev;
+	spin_lock_init(&br->lock);
+	INIT_LIST_HEAD(&br->port_list);
+	spin_lock_init(&br->hash_lock);
+
+	br->bridge_id.prio[0] = 0x80;
+	br->bridge_id.prio[1] = 0x00;
+
+	ether_addr_copy(br->group_addr, eth_reserved_addr_base);
+
+	br->stp_enabled = BR_NO_STP;
+	br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
+	br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
+
+	br->designated_root = br->bridge_id;
+	br->bridge_max_age = br->max_age = 20 * HZ;
+	br->bridge_hello_time = br->hello_time = 2 * HZ;
+	br->bridge_forward_delay = br->forward_delay = 15 * HZ;
+	br->ageing_time = 300 * HZ;
+
+	br_netfilter_rtable_init(br);
+	br_stp_timer_init(br);
+	br_multicast_init(br);
+}
diff --git a/kernel/net/bridge/br_fdb.c b/kernel/net/bridge/br_fdb.c
new file mode 100644
index 000000000..659fb9667
--- /dev/null
+++ b/kernel/net/bridge/br_fdb.c
@@ -0,0 +1,1050 @@
+/*
+ *	Forwarding database
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/rculist.h>
+#include <linux/spinlock.h>
+#include <linux/times.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/jhash.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/atomic.h>
+#include <asm/unaligned.h>
+#include <linux/if_vlan.h>
+#include "br_private.h"
+
+static struct kmem_cache *br_fdb_cache __read_mostly;
+static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head,
+					     const unsigned char *addr,
+					     __u16 vid);
+static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
+		      const unsigned char *addr, u16 vid);
+static void fdb_notify(struct net_bridge *br,
+		       const struct net_bridge_fdb_entry *, int);
+
+static u32 fdb_salt __read_mostly;
+
+int __init br_fdb_init(void)
+{
+	br_fdb_cache = kmem_cache_create("bridge_fdb_cache",
+					 sizeof(struct net_bridge_fdb_entry),
+					 0,
+					 SLAB_HWCACHE_ALIGN, NULL);
+	if (!br_fdb_cache)
+		return -ENOMEM;
+
+	get_random_bytes(&fdb_salt, sizeof(fdb_salt));
+	return 0;
+}
+
+void br_fdb_fini(void)
+{
+	kmem_cache_destroy(br_fdb_cache);
+}
+
+
+/* if topology_changing then use forward_delay (default 15 sec)
+ * otherwise keep longer (default 5 minutes)
+ */
+static inline unsigned long hold_time(const struct net_bridge *br)
+{
+	return br->topology_change ? br->forward_delay : br->ageing_time;
+}
+
+static inline int has_expired(const struct net_bridge *br,
+				  const struct net_bridge_fdb_entry *fdb)
+{
+	return !fdb->is_static &&
+		time_before_eq(fdb->updated + hold_time(br), jiffies);
+}
+
+static inline int br_mac_hash(const unsigned char *mac, __u16 vid)
+{
+	/* use 1 byte of OUI and 3 bytes of NIC */
+	u32 key = get_unaligned((u32 *)(mac + 2));
+	return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1);
+}
+
+static void fdb_rcu_free(struct rcu_head *head)
+{
+	struct net_bridge_fdb_entry *ent
+		= container_of(head, struct net_bridge_fdb_entry, rcu);
+	kmem_cache_free(br_fdb_cache, ent);
+}
+
+/* When a static FDB entry is added, the mac address from the entry is
+ * added to the bridge private HW address list and all required ports
+ * are then updated with the new information.
+ * Called under RTNL.
+ */
+static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr)
+{
+	int err;
+	struct net_bridge_port *p;
+
+	ASSERT_RTNL();
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (!br_promisc_port(p)) {
+			err = dev_uc_add(p->dev, addr);
+			if (err)
+				goto undo;
+		}
+	}
+
+	return;
+undo:
+	list_for_each_entry_continue_reverse(p, &br->port_list, list) {
+		if (!br_promisc_port(p))
+			dev_uc_del(p->dev, addr);
+	}
+}
+
+/* When a static FDB entry is deleted, the HW address from that entry is
+ * also removed from the bridge private HW address list and updates all
+ * the ports with needed information.
+ * Called under RTNL.
+ */
+static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr)
+{
+	struct net_bridge_port *p;
+
+	ASSERT_RTNL();
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (!br_promisc_port(p))
+			dev_uc_del(p->dev, addr);
+	}
+}
+
+static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f)
+{
+	if (f->is_static)
+		fdb_del_hw_addr(br, f->addr.addr);
+
+	hlist_del_rcu(&f->hlist);
+	fdb_notify(br, f, RTM_DELNEIGH);
+	call_rcu(&f->rcu, fdb_rcu_free);
+}
+
+/* Delete a local entry if no other port had the same address. */
+static void fdb_delete_local(struct net_bridge *br,
+			     const struct net_bridge_port *p,
+			     struct net_bridge_fdb_entry *f)
+{
+	const unsigned char *addr = f->addr.addr;
+	u16 vid = f->vlan_id;
+	struct net_bridge_port *op;
+
+	/* Maybe another port has same hw addr? */
+	list_for_each_entry(op, &br->port_list, list) {
+		if (op != p && ether_addr_equal(op->dev->dev_addr, addr) &&
+		    (!vid || nbp_vlan_find(op, vid))) {
+			f->dst = op;
+			f->added_by_user = 0;
+			return;
+		}
+	}
+
+	/* Maybe bridge device has same hw addr? */
+	if (p && ether_addr_equal(br->dev->dev_addr, addr) &&
+	    (!vid || br_vlan_find(br, vid))) {
+		f->dst = NULL;
+		f->added_by_user = 0;
+		return;
+	}
+
+	fdb_delete(br, f);
+}
+
+void br_fdb_find_delete_local(struct net_bridge *br,
+			      const struct net_bridge_port *p,
+			      const unsigned char *addr, u16 vid)
+{
+	struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
+	struct net_bridge_fdb_entry *f;
+
+	spin_lock_bh(&br->hash_lock);
+	f = fdb_find(head, addr, vid);
+	if (f && f->is_local && !f->added_by_user && f->dst == p)
+		fdb_delete_local(br, p, f);
+	spin_unlock_bh(&br->hash_lock);
+}
+
+void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
+{
+	struct net_bridge *br = p->br;
+	struct net_port_vlans *pv = nbp_get_vlan_info(p);
+	bool no_vlan = !pv;
+	int i;
+	u16 vid;
+
+	spin_lock_bh(&br->hash_lock);
+
+	/* Search all chains since old address/hash is unknown */
+	for (i = 0; i < BR_HASH_SIZE; i++) {
+		struct hlist_node *h;
+		hlist_for_each(h, &br->hash[i]) {
+			struct net_bridge_fdb_entry *f;
+
+			f = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
+			if (f->dst == p && f->is_local && !f->added_by_user) {
+				/* delete old one */
+				fdb_delete_local(br, p, f);
+
+				/* if this port has no vlan information
+				 * configured, we can safely be done at
+				 * this point.
+				 */
+				if (no_vlan)
+					goto insert;
+			}
+		}
+	}
+
+insert:
+	/* insert new address,  may fail if invalid address or dup. */
+	fdb_insert(br, p, newaddr, 0);
+
+	if (no_vlan)
+		goto done;
+
+	/* Now add entries for every VLAN configured on the port.
+	 * This function runs under RTNL so the bitmap will not change
+	 * from under us.
+	 */
+	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID)
+		fdb_insert(br, p, newaddr, vid);
+
+done:
+	spin_unlock_bh(&br->hash_lock);
+}
+
+void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr)
+{
+	struct net_bridge_fdb_entry *f;
+	struct net_port_vlans *pv;
+	u16 vid = 0;
+
+	spin_lock_bh(&br->hash_lock);
+
+	/* If old entry was unassociated with any port, then delete it. */
+	f = __br_fdb_get(br, br->dev->dev_addr, 0);
+	if (f && f->is_local && !f->dst)
+		fdb_delete_local(br, NULL, f);
+
+	fdb_insert(br, NULL, newaddr, 0);
+
+	/* Now remove and add entries for every VLAN configured on the
+	 * bridge.  This function runs under RTNL so the bitmap will not
+	 * change from under us.
+	 */
+	pv = br_get_vlan_info(br);
+	if (!pv)
+		goto out;
+
+	for_each_set_bit_from(vid, pv->vlan_bitmap, VLAN_N_VID) {
+		f = __br_fdb_get(br, br->dev->dev_addr, vid);
+		if (f && f->is_local && !f->dst)
+			fdb_delete_local(br, NULL, f);
+		fdb_insert(br, NULL, newaddr, vid);
+	}
+out:
+	spin_unlock_bh(&br->hash_lock);
+}
+
+void br_fdb_cleanup(unsigned long _data)
+{
+	struct net_bridge *br = (struct net_bridge *)_data;
+	unsigned long delay = hold_time(br);
+	unsigned long next_timer = jiffies + br->ageing_time;
+	int i;
+
+	spin_lock(&br->hash_lock);
+	for (i = 0; i < BR_HASH_SIZE; i++) {
+		struct net_bridge_fdb_entry *f;
+		struct hlist_node *n;
+
+		hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) {
+			unsigned long this_timer;
+			if (f->is_static)
+				continue;
+			this_timer = f->updated + delay;
+			if (time_before_eq(this_timer, jiffies))
+				fdb_delete(br, f);
+			else if (time_before(this_timer, next_timer))
+				next_timer = this_timer;
+		}
+	}
+	spin_unlock(&br->hash_lock);
+
+	mod_timer(&br->gc_timer, round_jiffies_up(next_timer));
+}
+
+/* Completely flush all dynamic entries in forwarding database.*/
+void br_fdb_flush(struct net_bridge *br)
+{
+	int i;
+
+	spin_lock_bh(&br->hash_lock);
+	for (i = 0; i < BR_HASH_SIZE; i++) {
+		struct net_bridge_fdb_entry *f;
+		struct hlist_node *n;
+		hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) {
+			if (!f->is_static)
+				fdb_delete(br, f);
+		}
+	}
+	spin_unlock_bh(&br->hash_lock);
+}
+
+/* Flush all entries referring to a specific port.
+ * if do_all is set also flush static entries
+ */
+void br_fdb_delete_by_port(struct net_bridge *br,
+			   const struct net_bridge_port *p,
+			   int do_all)
+{
+	int i;
+
+	spin_lock_bh(&br->hash_lock);
+	for (i = 0; i < BR_HASH_SIZE; i++) {
+		struct hlist_node *h, *g;
+
+		hlist_for_each_safe(h, g, &br->hash[i]) {
+			struct net_bridge_fdb_entry *f
+				= hlist_entry(h, struct net_bridge_fdb_entry, hlist);
+			if (f->dst != p)
+				continue;
+
+			if (f->is_static && !do_all)
+				continue;
+
+			if (f->is_local)
+				fdb_delete_local(br, p, f);
+			else
+				fdb_delete(br, f);
+		}
+	}
+	spin_unlock_bh(&br->hash_lock);
+}
+
+/* No locking or refcounting, assumes caller has rcu_read_lock */
+struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
+					  const unsigned char *addr,
+					  __u16 vid)
+{
+	struct net_bridge_fdb_entry *fdb;
+
+	hlist_for_each_entry_rcu(fdb,
+				&br->hash[br_mac_hash(addr, vid)], hlist) {
+		if (ether_addr_equal(fdb->addr.addr, addr) &&
+		    fdb->vlan_id == vid) {
+			if (unlikely(has_expired(br, fdb)))
+				break;
+			return fdb;
+		}
+	}
+
+	return NULL;
+}
+
+#if IS_ENABLED(CONFIG_ATM_LANE)
+/* Interface used by ATM LANE hook to test
+ * if an addr is on some other bridge port */
+int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
+{
+	struct net_bridge_fdb_entry *fdb;
+	struct net_bridge_port *port;
+	int ret;
+
+	rcu_read_lock();
+	port = br_port_get_rcu(dev);
+	if (!port)
+		ret = 0;
+	else {
+		fdb = __br_fdb_get(port->br, addr, 0);
+		ret = fdb && fdb->dst && fdb->dst->dev != dev &&
+			fdb->dst->state == BR_STATE_FORWARDING;
+	}
+	rcu_read_unlock();
+
+	return ret;
+}
+#endif /* CONFIG_ATM_LANE */
+
+/*
+ * Fill buffer with forwarding table records in
+ * the API format.
+ */
+int br_fdb_fillbuf(struct net_bridge *br, void *buf,
+		   unsigned long maxnum, unsigned long skip)
+{
+	struct __fdb_entry *fe = buf;
+	int i, num = 0;
+	struct net_bridge_fdb_entry *f;
+
+	memset(buf, 0, maxnum*sizeof(struct __fdb_entry));
+
+	rcu_read_lock();
+	for (i = 0; i < BR_HASH_SIZE; i++) {
+		hlist_for_each_entry_rcu(f, &br->hash[i], hlist) {
+			if (num >= maxnum)
+				goto out;
+
+			if (has_expired(br, f))
+				continue;
+
+			/* ignore pseudo entry for local MAC address */
+			if (!f->dst)
+				continue;
+
+			if (skip) {
+				--skip;
+				continue;
+			}
+
+			/* convert from internal format to API */
+			memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN);
+
+			/* due to ABI compat need to split into hi/lo */
+			fe->port_no = f->dst->port_no;
+			fe->port_hi = f->dst->port_no >> 8;
+
+			fe->is_local = f->is_local;
+			if (!f->is_static)
+				fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated);
+			++fe;
+			++num;
+		}
+	}
+
+ out:
+	rcu_read_unlock();
+
+	return num;
+}
+
+static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head,
+					     const unsigned char *addr,
+					     __u16 vid)
+{
+	struct net_bridge_fdb_entry *fdb;
+
+	hlist_for_each_entry(fdb, head, hlist) {
+		if (ether_addr_equal(fdb->addr.addr, addr) &&
+		    fdb->vlan_id == vid)
+			return fdb;
+	}
+	return NULL;
+}
+
+static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head,
+						 const unsigned char *addr,
+						 __u16 vid)
+{
+	struct net_bridge_fdb_entry *fdb;
+
+	hlist_for_each_entry_rcu(fdb, head, hlist) {
+		if (ether_addr_equal(fdb->addr.addr, addr) &&
+		    fdb->vlan_id == vid)
+			return fdb;
+	}
+	return NULL;
+}
+
+static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
+					       struct net_bridge_port *source,
+					       const unsigned char *addr,
+					       __u16 vid)
+{
+	struct net_bridge_fdb_entry *fdb;
+
+	fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC);
+	if (fdb) {
+		memcpy(fdb->addr.addr, addr, ETH_ALEN);
+		fdb->dst = source;
+		fdb->vlan_id = vid;
+		fdb->is_local = 0;
+		fdb->is_static = 0;
+		fdb->added_by_user = 0;
+		fdb->added_by_external_learn = 0;
+		fdb->updated = fdb->used = jiffies;
+		hlist_add_head_rcu(&fdb->hlist, head);
+	}
+	return fdb;
+}
+
+static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
+		  const unsigned char *addr, u16 vid)
+{
+	struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
+	struct net_bridge_fdb_entry *fdb;
+
+	if (!is_valid_ether_addr(addr))
+		return -EINVAL;
+
+	fdb = fdb_find(head, addr, vid);
+	if (fdb) {
+		/* it is okay to have multiple ports with same
+		 * address, just use the first one.
+		 */
+		if (fdb->is_local)
+			return 0;
+		br_warn(br, "adding interface %s with same address "
+		       "as a received packet\n",
+		       source ? source->dev->name : br->dev->name);
+		fdb_delete(br, fdb);
+	}
+
+	fdb = fdb_create(head, source, addr, vid);
+	if (!fdb)
+		return -ENOMEM;
+
+	fdb->is_local = fdb->is_static = 1;
+	fdb_add_hw_addr(br, addr);
+	fdb_notify(br, fdb, RTM_NEWNEIGH);
+	return 0;
+}
+
+/* Add entry for local address of interface */
+int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
+		  const unsigned char *addr, u16 vid)
+{
+	int ret;
+
+	spin_lock_bh(&br->hash_lock);
+	ret = fdb_insert(br, source, addr, vid);
+	spin_unlock_bh(&br->hash_lock);
+	return ret;
+}
+
+void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
+		   const unsigned char *addr, u16 vid, bool added_by_user)
+{
+	struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
+	struct net_bridge_fdb_entry *fdb;
+	bool fdb_modified = false;
+
+	/* some users want to always flood. */
+	if (hold_time(br) == 0)
+		return;
+
+	/* ignore packets unless we are using this port */
+	if (!(source->state == BR_STATE_LEARNING ||
+	      source->state == BR_STATE_FORWARDING))
+		return;
+
+	fdb = fdb_find_rcu(head, addr, vid);
+	if (likely(fdb)) {
+		/* attempt to update an entry for a local interface */
+		if (unlikely(fdb->is_local)) {
+			if (net_ratelimit())
+				br_warn(br, "received packet on %s with "
+					"own address as source address\n",
+					source->dev->name);
+		} else {
+			/* fastpath: update of existing entry */
+			if (unlikely(source != fdb->dst)) {
+				fdb->dst = source;
+				fdb_modified = true;
+			}
+			fdb->updated = jiffies;
+			if (unlikely(added_by_user))
+				fdb->added_by_user = 1;
+			if (unlikely(fdb_modified))
+				fdb_notify(br, fdb, RTM_NEWNEIGH);
+		}
+	} else {
+		spin_lock(&br->hash_lock);
+		if (likely(!fdb_find(head, addr, vid))) {
+			fdb = fdb_create(head, source, addr, vid);
+			if (fdb) {
+				if (unlikely(added_by_user))
+					fdb->added_by_user = 1;
+				fdb_notify(br, fdb, RTM_NEWNEIGH);
+			}
+		}
+		/* else  we lose race and someone else inserts
+		 * it first, don't bother updating
+		 */
+		spin_unlock(&br->hash_lock);
+	}
+}
+
+static int fdb_to_nud(const struct net_bridge_fdb_entry *fdb)
+{
+	if (fdb->is_local)
+		return NUD_PERMANENT;
+	else if (fdb->is_static)
+		return NUD_NOARP;
+	else if (has_expired(fdb->dst->br, fdb))
+		return NUD_STALE;
+	else
+		return NUD_REACHABLE;
+}
+
+static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
+			 const struct net_bridge_fdb_entry *fdb,
+			 u32 portid, u32 seq, int type, unsigned int flags)
+{
+	unsigned long now = jiffies;
+	struct nda_cacheinfo ci;
+	struct nlmsghdr *nlh;
+	struct ndmsg *ndm;
+
+	nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
+	if (nlh == NULL)
+		return -EMSGSIZE;
+
+	ndm = nlmsg_data(nlh);
+	ndm->ndm_family	 = AF_BRIDGE;
+	ndm->ndm_pad1    = 0;
+	ndm->ndm_pad2    = 0;
+	ndm->ndm_flags	 = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0;
+	ndm->ndm_type	 = 0;
+	ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex;
+	ndm->ndm_state   = fdb_to_nud(fdb);
+
+	if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr))
+		goto nla_put_failure;
+	if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex))
+		goto nla_put_failure;
+	ci.ndm_used	 = jiffies_to_clock_t(now - fdb->used);
+	ci.ndm_confirmed = 0;
+	ci.ndm_updated	 = jiffies_to_clock_t(now - fdb->updated);
+	ci.ndm_refcnt	 = 0;
+	if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
+		goto nla_put_failure;
+
+	if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id))
+		goto nla_put_failure;
+
+	nlmsg_end(skb, nlh);
+	return 0;
+
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+static inline size_t fdb_nlmsg_size(void)
+{
+	return NLMSG_ALIGN(sizeof(struct ndmsg))
+		+ nla_total_size(ETH_ALEN) /* NDA_LLADDR */
+		+ nla_total_size(sizeof(u32)) /* NDA_MASTER */
+		+ nla_total_size(sizeof(u16)) /* NDA_VLAN */
+		+ nla_total_size(sizeof(struct nda_cacheinfo));
+}
+
+static void fdb_notify(struct net_bridge *br,
+		       const struct net_bridge_fdb_entry *fdb, int type)
+{
+	struct net *net = dev_net(br->dev);
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+
+	skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC);
+	if (skb == NULL)
+		goto errout;
+
+	err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0);
+	if (err < 0) {
+		/* -EMSGSIZE implies BUG in fdb_nlmsg_size() */
+		WARN_ON(err == -EMSGSIZE);
+		kfree_skb(skb);
+		goto errout;
+	}
+	rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
+	return;
+errout:
+	rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
+}
+
+/* Dump information about entries, in response to GETNEIGH */
+int br_fdb_dump(struct sk_buff *skb,
+		struct netlink_callback *cb,
+		struct net_device *dev,
+		struct net_device *filter_dev,
+		int idx)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	int i;
+
+	if (!(dev->priv_flags & IFF_EBRIDGE))
+		goto out;
+
+	if (!filter_dev)
+		idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
+
+	for (i = 0; i < BR_HASH_SIZE; i++) {
+		struct net_bridge_fdb_entry *f;
+
+		hlist_for_each_entry_rcu(f, &br->hash[i], hlist) {
+			if (idx < cb->args[0])
+				goto skip;
+
+			if (filter_dev &&
+			    (!f->dst || f->dst->dev != filter_dev)) {
+				if (filter_dev != dev)
+					goto skip;
+				/* !f->dst is a special case for bridge
+				 * It means the MAC belongs to the bridge
+				 * Therefore need a little more filtering
+				 * we only want to dump the !f->dst case
+				 */
+				if (f->dst)
+					goto skip;
+			}
+			if (!filter_dev && f->dst)
+				goto skip;
+
+			if (fdb_fill_info(skb, br, f,
+					  NETLINK_CB(cb->skb).portid,
+					  cb->nlh->nlmsg_seq,
+					  RTM_NEWNEIGH,
+					  NLM_F_MULTI) < 0)
+				break;
+skip:
+			++idx;
+		}
+	}
+
+out:
+	return idx;
+}
+
+/* Update (create or replace) forwarding database entry */
+static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr,
+			 __u16 state, __u16 flags, __u16 vid)
+{
+	struct net_bridge *br = source->br;
+	struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
+	struct net_bridge_fdb_entry *fdb;
+	bool modified = false;
+
+	fdb = fdb_find(head, addr, vid);
+	if (fdb == NULL) {
+		if (!(flags & NLM_F_CREATE))
+			return -ENOENT;
+
+		fdb = fdb_create(head, source, addr, vid);
+		if (!fdb)
+			return -ENOMEM;
+
+		modified = true;
+	} else {
+		if (flags & NLM_F_EXCL)
+			return -EEXIST;
+
+		if (fdb->dst != source) {
+			fdb->dst = source;
+			modified = true;
+		}
+	}
+
+	if (fdb_to_nud(fdb) != state) {
+		if (state & NUD_PERMANENT) {
+			fdb->is_local = 1;
+			if (!fdb->is_static) {
+				fdb->is_static = 1;
+				fdb_add_hw_addr(br, addr);
+			}
+		} else if (state & NUD_NOARP) {
+			fdb->is_local = 0;
+			if (!fdb->is_static) {
+				fdb->is_static = 1;
+				fdb_add_hw_addr(br, addr);
+			}
+		} else {
+			fdb->is_local = 0;
+			if (fdb->is_static) {
+				fdb->is_static = 0;
+				fdb_del_hw_addr(br, addr);
+			}
+		}
+
+		modified = true;
+	}
+	fdb->added_by_user = 1;
+
+	fdb->used = jiffies;
+	if (modified) {
+		fdb->updated = jiffies;
+		fdb_notify(br, fdb, RTM_NEWNEIGH);
+	}
+
+	return 0;
+}
+
+static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p,
+	       const unsigned char *addr, u16 nlh_flags, u16 vid)
+{
+	int err = 0;
+
+	if (ndm->ndm_flags & NTF_USE) {
+		local_bh_disable();
+		rcu_read_lock();
+		br_fdb_update(p->br, p, addr, vid, true);
+		rcu_read_unlock();
+		local_bh_enable();
+	} else {
+		spin_lock_bh(&p->br->hash_lock);
+		err = fdb_add_entry(p, addr, ndm->ndm_state,
+				    nlh_flags, vid);
+		spin_unlock_bh(&p->br->hash_lock);
+	}
+
+	return err;
+}
+
+/* Add new permanent fdb entry with RTM_NEWNEIGH */
+int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
+	       struct net_device *dev,
+	       const unsigned char *addr, u16 vid, u16 nlh_flags)
+{
+	struct net_bridge_port *p;
+	int err = 0;
+	struct net_port_vlans *pv;
+
+	if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) {
+		pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state);
+		return -EINVAL;
+	}
+
+	if (is_zero_ether_addr(addr)) {
+		pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n");
+		return -EINVAL;
+	}
+
+	p = br_port_get_rtnl(dev);
+	if (p == NULL) {
+		pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n",
+			dev->name);
+		return -EINVAL;
+	}
+
+	pv = nbp_get_vlan_info(p);
+	if (vid) {
+		if (!pv || !test_bit(vid, pv->vlan_bitmap)) {
+			pr_info("bridge: RTM_NEWNEIGH with unconfigured "
+				"vlan %d on port %s\n", vid, dev->name);
+			return -EINVAL;
+		}
+
+		/* VID was specified, so use it. */
+		err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
+	} else {
+		err = __br_fdb_add(ndm, p, addr, nlh_flags, 0);
+		if (err || !pv)
+			goto out;
+
+		/* We have vlans configured on this port and user didn't
+		 * specify a VLAN.  To be nice, add/update entry for every
+		 * vlan on this port.
+		 */
+		for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+			err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
+			if (err)
+				goto out;
+		}
+	}
+
+out:
+	return err;
+}
+
+static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vlan)
+{
+	struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)];
+	struct net_bridge_fdb_entry *fdb;
+
+	fdb = fdb_find(head, addr, vlan);
+	if (!fdb)
+		return -ENOENT;
+
+	fdb_delete(br, fdb);
+	return 0;
+}
+
+static int __br_fdb_delete(struct net_bridge_port *p,
+			   const unsigned char *addr, u16 vid)
+{
+	int err;
+
+	spin_lock_bh(&p->br->hash_lock);
+	err = fdb_delete_by_addr(p->br, addr, vid);
+	spin_unlock_bh(&p->br->hash_lock);
+
+	return err;
+}
+
+/* Remove neighbor entry with RTM_DELNEIGH */
+int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
+		  struct net_device *dev,
+		  const unsigned char *addr, u16 vid)
+{
+	struct net_bridge_port *p;
+	int err;
+	struct net_port_vlans *pv;
+
+	p = br_port_get_rtnl(dev);
+	if (p == NULL) {
+		pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n",
+			dev->name);
+		return -EINVAL;
+	}
+
+	pv = nbp_get_vlan_info(p);
+	if (vid) {
+		if (!pv || !test_bit(vid, pv->vlan_bitmap)) {
+			pr_info("bridge: RTM_DELNEIGH with unconfigured "
+				"vlan %d on port %s\n", vid, dev->name);
+			return -EINVAL;
+		}
+
+		err = __br_fdb_delete(p, addr, vid);
+	} else {
+		err = -ENOENT;
+		err &= __br_fdb_delete(p, addr, 0);
+		if (!pv)
+			goto out;
+
+		/* We have vlans configured on this port and user didn't
+		 * specify a VLAN.  To be nice, add/update entry for every
+		 * vlan on this port.
+		 */
+		for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+			err &= __br_fdb_delete(p, addr, vid);
+		}
+	}
+out:
+	return err;
+}
+
+int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p)
+{
+	struct net_bridge_fdb_entry *fdb, *tmp;
+	int i;
+	int err;
+
+	ASSERT_RTNL();
+
+	for (i = 0; i < BR_HASH_SIZE; i++) {
+		hlist_for_each_entry(fdb, &br->hash[i], hlist) {
+			/* We only care for static entries */
+			if (!fdb->is_static)
+				continue;
+
+			err = dev_uc_add(p->dev, fdb->addr.addr);
+			if (err)
+				goto rollback;
+		}
+	}
+	return 0;
+
+rollback:
+	for (i = 0; i < BR_HASH_SIZE; i++) {
+		hlist_for_each_entry(tmp, &br->hash[i], hlist) {
+			/* If we reached the fdb that failed, we can stop */
+			if (tmp == fdb)
+				break;
+
+			/* We only care for static entries */
+			if (!tmp->is_static)
+				continue;
+
+			dev_uc_del(p->dev, tmp->addr.addr);
+		}
+	}
+	return err;
+}
+
+void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p)
+{
+	struct net_bridge_fdb_entry *fdb;
+	int i;
+
+	ASSERT_RTNL();
+
+	for (i = 0; i < BR_HASH_SIZE; i++) {
+		hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) {
+			/* We only care for static entries */
+			if (!fdb->is_static)
+				continue;
+
+			dev_uc_del(p->dev, fdb->addr.addr);
+		}
+	}
+}
+
+int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
+			      const unsigned char *addr, u16 vid)
+{
+	struct hlist_head *head;
+	struct net_bridge_fdb_entry *fdb;
+	int err = 0;
+
+	ASSERT_RTNL();
+	spin_lock_bh(&br->hash_lock);
+
+	head = &br->hash[br_mac_hash(addr, vid)];
+	fdb = fdb_find(head, addr, vid);
+	if (!fdb) {
+		fdb = fdb_create(head, p, addr, vid);
+		if (!fdb) {
+			err = -ENOMEM;
+			goto err_unlock;
+		}
+		fdb->added_by_external_learn = 1;
+		fdb_notify(br, fdb, RTM_NEWNEIGH);
+	} else if (fdb->added_by_external_learn) {
+		/* Refresh entry */
+		fdb->updated = fdb->used = jiffies;
+	} else if (!fdb->added_by_user) {
+		/* Take over SW learned entry */
+		fdb->added_by_external_learn = 1;
+		fdb->updated = jiffies;
+		fdb_notify(br, fdb, RTM_NEWNEIGH);
+	}
+
+err_unlock:
+	spin_unlock_bh(&br->hash_lock);
+
+	return err;
+}
+
+int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
+			      const unsigned char *addr, u16 vid)
+{
+	struct hlist_head *head;
+	struct net_bridge_fdb_entry *fdb;
+	int err = 0;
+
+	ASSERT_RTNL();
+	spin_lock_bh(&br->hash_lock);
+
+	head = &br->hash[br_mac_hash(addr, vid)];
+	fdb = fdb_find(head, addr, vid);
+	if (fdb && fdb->added_by_external_learn)
+		fdb_delete(br, fdb);
+	else
+		err = -ENOENT;
+
+	spin_unlock_bh(&br->hash_lock);
+
+	return err;
+}
diff --git a/kernel/net/bridge/br_forward.c b/kernel/net/bridge/br_forward.c
new file mode 100644
index 000000000..e97572b5d
--- /dev/null
+++ b/kernel/net/bridge/br_forward.c
@@ -0,0 +1,292 @@
+/*
+ *	Forwarding decision
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/netpoll.h>
+#include <linux/skbuff.h>
+#include <linux/if_vlan.h>
+#include <linux/netfilter_bridge.h>
+#include "br_private.h"
+
+static int deliver_clone(const struct net_bridge_port *prev,
+			 struct sk_buff *skb,
+			 void (*__packet_hook)(const struct net_bridge_port *p,
+					       struct sk_buff *skb));
+
+/* Don't forward packets to originating port or forwarding disabled */
+static inline int should_deliver(const struct net_bridge_port *p,
+				 const struct sk_buff *skb)
+{
+	return ((p->flags & BR_HAIRPIN_MODE) || skb->dev != p->dev) &&
+		br_allowed_egress(p->br, nbp_get_vlan_info(p), skb) &&
+		p->state == BR_STATE_FORWARDING;
+}
+
+int br_dev_queue_push_xmit(struct sock *sk, struct sk_buff *skb)
+{
+	if (!is_skb_forwardable(skb->dev, skb)) {
+		kfree_skb(skb);
+	} else {
+		skb_push(skb, ETH_HLEN);
+		br_drop_fake_rtable(skb);
+		dev_queue_xmit(skb);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(br_dev_queue_push_xmit);
+
+int br_forward_finish(struct sock *sk, struct sk_buff *skb)
+{
+	return NF_HOOK(NFPROTO_BRIDGE, NF_BR_POST_ROUTING, sk, skb,
+		       NULL, skb->dev,
+		       br_dev_queue_push_xmit);
+
+}
+EXPORT_SYMBOL_GPL(br_forward_finish);
+
+static void __br_deliver(const struct net_bridge_port *to, struct sk_buff *skb)
+{
+	skb = br_handle_vlan(to->br, nbp_get_vlan_info(to), skb);
+	if (!skb)
+		return;
+
+	skb->dev = to->dev;
+
+	if (unlikely(netpoll_tx_running(to->br->dev))) {
+		if (!is_skb_forwardable(skb->dev, skb))
+			kfree_skb(skb);
+		else {
+			skb_push(skb, ETH_HLEN);
+			br_netpoll_send_skb(to, skb);
+		}
+		return;
+	}
+
+	NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, NULL, skb,
+		NULL, skb->dev,
+		br_forward_finish);
+}
+
+static void __br_forward(const struct net_bridge_port *to, struct sk_buff *skb)
+{
+	struct net_device *indev;
+
+	if (skb_warn_if_lro(skb)) {
+		kfree_skb(skb);
+		return;
+	}
+
+	skb = br_handle_vlan(to->br, nbp_get_vlan_info(to), skb);
+	if (!skb)
+		return;
+
+	indev = skb->dev;
+	skb->dev = to->dev;
+	skb_forward_csum(skb);
+
+	NF_HOOK(NFPROTO_BRIDGE, NF_BR_FORWARD, NULL, skb,
+		indev, skb->dev,
+		br_forward_finish);
+}
+
+/* called with rcu_read_lock */
+void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb)
+{
+	if (to && should_deliver(to, skb)) {
+		__br_deliver(to, skb);
+		return;
+	}
+
+	kfree_skb(skb);
+}
+EXPORT_SYMBOL_GPL(br_deliver);
+
+/* called with rcu_read_lock */
+void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, struct sk_buff *skb0)
+{
+	if (should_deliver(to, skb)) {
+		if (skb0)
+			deliver_clone(to, skb, __br_forward);
+		else
+			__br_forward(to, skb);
+		return;
+	}
+
+	if (!skb0)
+		kfree_skb(skb);
+}
+
+static int deliver_clone(const struct net_bridge_port *prev,
+			 struct sk_buff *skb,
+			 void (*__packet_hook)(const struct net_bridge_port *p,
+					       struct sk_buff *skb))
+{
+	struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
+
+	skb = skb_clone(skb, GFP_ATOMIC);
+	if (!skb) {
+		dev->stats.tx_dropped++;
+		return -ENOMEM;
+	}
+
+	__packet_hook(prev, skb);
+	return 0;
+}
+
+static struct net_bridge_port *maybe_deliver(
+	struct net_bridge_port *prev, struct net_bridge_port *p,
+	struct sk_buff *skb,
+	void (*__packet_hook)(const struct net_bridge_port *p,
+			      struct sk_buff *skb))
+{
+	int err;
+
+	if (!should_deliver(p, skb))
+		return prev;
+
+	if (!prev)
+		goto out;
+
+	err = deliver_clone(prev, skb, __packet_hook);
+	if (err)
+		return ERR_PTR(err);
+
+out:
+	return p;
+}
+
+/* called under bridge lock */
+static void br_flood(struct net_bridge *br, struct sk_buff *skb,
+		     struct sk_buff *skb0,
+		     void (*__packet_hook)(const struct net_bridge_port *p,
+					   struct sk_buff *skb),
+		     bool unicast)
+{
+	struct net_bridge_port *p;
+	struct net_bridge_port *prev;
+
+	prev = NULL;
+
+	list_for_each_entry_rcu(p, &br->port_list, list) {
+		/* Do not flood unicast traffic to ports that turn it off */
+		if (unicast && !(p->flags & BR_FLOOD))
+			continue;
+
+		/* Do not flood to ports that enable proxy ARP */
+		if (p->flags & BR_PROXYARP)
+			continue;
+		if ((p->flags & BR_PROXYARP_WIFI) &&
+		    BR_INPUT_SKB_CB(skb)->proxyarp_replied)
+			continue;
+
+		prev = maybe_deliver(prev, p, skb, __packet_hook);
+		if (IS_ERR(prev))
+			goto out;
+	}
+
+	if (!prev)
+		goto out;
+
+	if (skb0)
+		deliver_clone(prev, skb, __packet_hook);
+	else
+		__packet_hook(prev, skb);
+	return;
+
+out:
+	if (!skb0)
+		kfree_skb(skb);
+}
+
+
+/* called with rcu_read_lock */
+void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast)
+{
+	br_flood(br, skb, NULL, __br_deliver, unicast);
+}
+
+/* called under bridge lock */
+void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
+		      struct sk_buff *skb2, bool unicast)
+{
+	br_flood(br, skb, skb2, __br_forward, unicast);
+}
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+/* called with rcu_read_lock */
+static void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
+			       struct sk_buff *skb, struct sk_buff *skb0,
+			       void (*__packet_hook)(
+					const struct net_bridge_port *p,
+					struct sk_buff *skb))
+{
+	struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
+	struct net_bridge *br = netdev_priv(dev);
+	struct net_bridge_port *prev = NULL;
+	struct net_bridge_port_group *p;
+	struct hlist_node *rp;
+
+	rp = rcu_dereference(hlist_first_rcu(&br->router_list));
+	p = mdst ? rcu_dereference(mdst->ports) : NULL;
+	while (p || rp) {
+		struct net_bridge_port *port, *lport, *rport;
+
+		lport = p ? p->port : NULL;
+		rport = rp ? hlist_entry(rp, struct net_bridge_port, rlist) :
+			     NULL;
+
+		port = (unsigned long)lport > (unsigned long)rport ?
+		       lport : rport;
+
+		prev = maybe_deliver(prev, port, skb, __packet_hook);
+		if (IS_ERR(prev))
+			goto out;
+
+		if ((unsigned long)lport >= (unsigned long)port)
+			p = rcu_dereference(p->next);
+		if ((unsigned long)rport >= (unsigned long)port)
+			rp = rcu_dereference(hlist_next_rcu(rp));
+	}
+
+	if (!prev)
+		goto out;
+
+	if (skb0)
+		deliver_clone(prev, skb, __packet_hook);
+	else
+		__packet_hook(prev, skb);
+	return;
+
+out:
+	if (!skb0)
+		kfree_skb(skb);
+}
+
+/* called with rcu_read_lock */
+void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
+			  struct sk_buff *skb)
+{
+	br_multicast_flood(mdst, skb, NULL, __br_deliver);
+}
+
+/* called with rcu_read_lock */
+void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
+			  struct sk_buff *skb, struct sk_buff *skb2)
+{
+	br_multicast_flood(mdst, skb, skb2, __br_forward);
+}
+#endif
diff --git a/kernel/net/bridge/br_if.c b/kernel/net/bridge/br_if.c
new file mode 100644
index 000000000..1849d96b3
--- /dev/null
+++ b/kernel/net/bridge/br_if.c
@@ -0,0 +1,586 @@
+/*
+ *	Userspace interface
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/netpoll.h>
+#include <linux/ethtool.h>
+#include <linux/if_arp.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/rtnetlink.h>
+#include <linux/if_ether.h>
+#include <linux/slab.h>
+#include <net/sock.h>
+#include <linux/if_vlan.h>
+
+#include "br_private.h"
+
+/*
+ * Determine initial path cost based on speed.
+ * using recommendations from 802.1d standard
+ *
+ * Since driver might sleep need to not be holding any locks.
+ */
+static int port_cost(struct net_device *dev)
+{
+	struct ethtool_cmd ecmd;
+
+	if (!__ethtool_get_settings(dev, &ecmd)) {
+		switch (ethtool_cmd_speed(&ecmd)) {
+		case SPEED_10000:
+			return 2;
+		case SPEED_1000:
+			return 4;
+		case SPEED_100:
+			return 19;
+		case SPEED_10:
+			return 100;
+		}
+	}
+
+	/* Old silly heuristics based on name */
+	if (!strncmp(dev->name, "lec", 3))
+		return 7;
+
+	if (!strncmp(dev->name, "plip", 4))
+		return 2500;
+
+	return 100;	/* assume old 10Mbps */
+}
+
+
+/* Check for port carrier transitions. */
+void br_port_carrier_check(struct net_bridge_port *p)
+{
+	struct net_device *dev = p->dev;
+	struct net_bridge *br = p->br;
+
+	if (!(p->flags & BR_ADMIN_COST) &&
+	    netif_running(dev) && netif_oper_up(dev))
+		p->path_cost = port_cost(dev);
+
+	if (!netif_running(br->dev))
+		return;
+
+	spin_lock_bh(&br->lock);
+	if (netif_running(dev) && netif_oper_up(dev)) {
+		if (p->state == BR_STATE_DISABLED)
+			br_stp_enable_port(p);
+	} else {
+		if (p->state != BR_STATE_DISABLED)
+			br_stp_disable_port(p);
+	}
+	spin_unlock_bh(&br->lock);
+}
+
+static void br_port_set_promisc(struct net_bridge_port *p)
+{
+	int err = 0;
+
+	if (br_promisc_port(p))
+		return;
+
+	err = dev_set_promiscuity(p->dev, 1);
+	if (err)
+		return;
+
+	br_fdb_unsync_static(p->br, p);
+	p->flags |= BR_PROMISC;
+}
+
+static void br_port_clear_promisc(struct net_bridge_port *p)
+{
+	int err;
+
+	/* Check if the port is already non-promisc or if it doesn't
+	 * support UNICAST filtering.  Without unicast filtering support
+	 * we'll end up re-enabling promisc mode anyway, so just check for
+	 * it here.
+	 */
+	if (!br_promisc_port(p) || !(p->dev->priv_flags & IFF_UNICAST_FLT))
+		return;
+
+	/* Since we'll be clearing the promisc mode, program the port
+	 * first so that we don't have interruption in traffic.
+	 */
+	err = br_fdb_sync_static(p->br, p);
+	if (err)
+		return;
+
+	dev_set_promiscuity(p->dev, -1);
+	p->flags &= ~BR_PROMISC;
+}
+
+/* When a port is added or removed or when certain port flags
+ * change, this function is called to automatically manage
+ * promiscuity setting of all the bridge ports.  We are always called
+ * under RTNL so can skip using rcu primitives.
+ */
+void br_manage_promisc(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+	bool set_all = false;
+
+	/* If vlan filtering is disabled or bridge interface is placed
+	 * into promiscuous mode, place all ports in promiscuous mode.
+	 */
+	if ((br->dev->flags & IFF_PROMISC) || !br_vlan_enabled(br))
+		set_all = true;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (set_all) {
+			br_port_set_promisc(p);
+		} else {
+			/* If the number of auto-ports is <= 1, then all other
+			 * ports will have their output configuration
+			 * statically specified through fdbs.  Since ingress
+			 * on the auto-port becomes forwarding/egress to other
+			 * ports and egress configuration is statically known,
+			 * we can say that ingress configuration of the
+			 * auto-port is also statically known.
+			 * This lets us disable promiscuous mode and write
+			 * this config to hw.
+			 */
+			if (br->auto_cnt == 0 ||
+			    (br->auto_cnt == 1 && br_auto_port(p)))
+				br_port_clear_promisc(p);
+			else
+				br_port_set_promisc(p);
+		}
+	}
+}
+
+static void nbp_update_port_count(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+	u32 cnt = 0;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (br_auto_port(p))
+			cnt++;
+	}
+	if (br->auto_cnt != cnt) {
+		br->auto_cnt = cnt;
+		br_manage_promisc(br);
+	}
+}
+
+static void nbp_delete_promisc(struct net_bridge_port *p)
+{
+	/* If port is currently promiscuous, unset promiscuity.
+	 * Otherwise, it is a static port so remove all addresses
+	 * from it.
+	 */
+	dev_set_allmulti(p->dev, -1);
+	if (br_promisc_port(p))
+		dev_set_promiscuity(p->dev, -1);
+	else
+		br_fdb_unsync_static(p->br, p);
+}
+
+static void release_nbp(struct kobject *kobj)
+{
+	struct net_bridge_port *p
+		= container_of(kobj, struct net_bridge_port, kobj);
+	kfree(p);
+}
+
+static struct kobj_type brport_ktype = {
+#ifdef CONFIG_SYSFS
+	.sysfs_ops = &brport_sysfs_ops,
+#endif
+	.release = release_nbp,
+};
+
+static void destroy_nbp(struct net_bridge_port *p)
+{
+	struct net_device *dev = p->dev;
+
+	p->br = NULL;
+	p->dev = NULL;
+	dev_put(dev);
+
+	kobject_put(&p->kobj);
+}
+
+static void destroy_nbp_rcu(struct rcu_head *head)
+{
+	struct net_bridge_port *p =
+			container_of(head, struct net_bridge_port, rcu);
+	destroy_nbp(p);
+}
+
+/* Delete port(interface) from bridge is done in two steps.
+ * via RCU. First step, marks device as down. That deletes
+ * all the timers and stops new packets from flowing through.
+ *
+ * Final cleanup doesn't occur until after all CPU's finished
+ * processing packets.
+ *
+ * Protected from multiple admin operations by RTNL mutex
+ */
+static void del_nbp(struct net_bridge_port *p)
+{
+	struct net_bridge *br = p->br;
+	struct net_device *dev = p->dev;
+
+	sysfs_remove_link(br->ifobj, p->dev->name);
+
+	nbp_delete_promisc(p);
+
+	spin_lock_bh(&br->lock);
+	br_stp_disable_port(p);
+	spin_unlock_bh(&br->lock);
+
+	br_ifinfo_notify(RTM_DELLINK, p);
+
+	list_del_rcu(&p->list);
+
+	nbp_vlan_flush(p);
+	br_fdb_delete_by_port(br, p, 1);
+	nbp_update_port_count(br);
+
+	netdev_upper_dev_unlink(dev, br->dev);
+
+	dev->priv_flags &= ~IFF_BRIDGE_PORT;
+
+	netdev_rx_handler_unregister(dev);
+
+	br_multicast_del_port(p);
+
+	kobject_uevent(&p->kobj, KOBJ_REMOVE);
+	kobject_del(&p->kobj);
+
+	br_netpoll_disable(p);
+
+	call_rcu(&p->rcu, destroy_nbp_rcu);
+}
+
+/* Delete bridge device */
+void br_dev_delete(struct net_device *dev, struct list_head *head)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	struct net_bridge_port *p, *n;
+
+	list_for_each_entry_safe(p, n, &br->port_list, list) {
+		del_nbp(p);
+	}
+
+	br_fdb_delete_by_port(br, NULL, 1);
+
+	br_vlan_flush(br);
+	del_timer_sync(&br->gc_timer);
+
+	br_sysfs_delbr(br->dev);
+	unregister_netdevice_queue(br->dev, head);
+}
+
+/* find an available port number */
+static int find_portno(struct net_bridge *br)
+{
+	int index;
+	struct net_bridge_port *p;
+	unsigned long *inuse;
+
+	inuse = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long),
+			GFP_KERNEL);
+	if (!inuse)
+		return -ENOMEM;
+
+	set_bit(0, inuse);	/* zero is reserved */
+	list_for_each_entry(p, &br->port_list, list) {
+		set_bit(p->port_no, inuse);
+	}
+	index = find_first_zero_bit(inuse, BR_MAX_PORTS);
+	kfree(inuse);
+
+	return (index >= BR_MAX_PORTS) ? -EXFULL : index;
+}
+
+/* called with RTNL but without bridge lock */
+static struct net_bridge_port *new_nbp(struct net_bridge *br,
+				       struct net_device *dev)
+{
+	int index;
+	struct net_bridge_port *p;
+
+	index = find_portno(br);
+	if (index < 0)
+		return ERR_PTR(index);
+
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	if (p == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	p->br = br;
+	dev_hold(dev);
+	p->dev = dev;
+	p->path_cost = port_cost(dev);
+	p->priority = 0x8000 >> BR_PORT_BITS;
+	p->port_no = index;
+	p->flags = BR_LEARNING | BR_FLOOD;
+	br_init_port(p);
+	br_set_state(p, BR_STATE_DISABLED);
+	br_stp_port_timer_init(p);
+	br_multicast_add_port(p);
+
+	return p;
+}
+
+int br_add_bridge(struct net *net, const char *name)
+{
+	struct net_device *dev;
+	int res;
+
+	dev = alloc_netdev(sizeof(struct net_bridge), name, NET_NAME_UNKNOWN,
+			   br_dev_setup);
+
+	if (!dev)
+		return -ENOMEM;
+
+	dev_net_set(dev, net);
+	dev->rtnl_link_ops = &br_link_ops;
+
+	res = register_netdev(dev);
+	if (res)
+		free_netdev(dev);
+	return res;
+}
+
+int br_del_bridge(struct net *net, const char *name)
+{
+	struct net_device *dev;
+	int ret = 0;
+
+	rtnl_lock();
+	dev = __dev_get_by_name(net, name);
+	if (dev == NULL)
+		ret =  -ENXIO; 	/* Could not find device */
+
+	else if (!(dev->priv_flags & IFF_EBRIDGE)) {
+		/* Attempt to delete non bridge device! */
+		ret = -EPERM;
+	}
+
+	else if (dev->flags & IFF_UP) {
+		/* Not shutdown yet. */
+		ret = -EBUSY;
+	}
+
+	else
+		br_dev_delete(dev, NULL);
+
+	rtnl_unlock();
+	return ret;
+}
+
+/* MTU of the bridge pseudo-device: ETH_DATA_LEN or the minimum of the ports */
+int br_min_mtu(const struct net_bridge *br)
+{
+	const struct net_bridge_port *p;
+	int mtu = 0;
+
+	ASSERT_RTNL();
+
+	if (list_empty(&br->port_list))
+		mtu = ETH_DATA_LEN;
+	else {
+		list_for_each_entry(p, &br->port_list, list) {
+			if (!mtu  || p->dev->mtu < mtu)
+				mtu = p->dev->mtu;
+		}
+	}
+	return mtu;
+}
+
+/*
+ * Recomputes features using slave's features
+ */
+netdev_features_t br_features_recompute(struct net_bridge *br,
+	netdev_features_t features)
+{
+	struct net_bridge_port *p;
+	netdev_features_t mask;
+
+	if (list_empty(&br->port_list))
+		return features;
+
+	mask = features;
+	features &= ~NETIF_F_ONE_FOR_ALL;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		features = netdev_increment_features(features,
+						     p->dev->features, mask);
+	}
+	features = netdev_add_tso_features(features, mask);
+
+	return features;
+}
+
+/* called with RTNL */
+int br_add_if(struct net_bridge *br, struct net_device *dev)
+{
+	struct net_bridge_port *p;
+	int err = 0;
+	bool changed_addr;
+
+	/* Don't allow bridging non-ethernet like devices, or DSA-enabled
+	 * master network devices since the bridge layer rx_handler prevents
+	 * the DSA fake ethertype handler to be invoked, so we do not strip off
+	 * the DSA switch tag protocol header and the bridge layer just return
+	 * RX_HANDLER_CONSUMED, stopping RX processing for these frames.
+	 */
+	if ((dev->flags & IFF_LOOPBACK) ||
+	    dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN ||
+	    !is_valid_ether_addr(dev->dev_addr) ||
+	    netdev_uses_dsa(dev))
+		return -EINVAL;
+
+	/* No bridging of bridges */
+	if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit)
+		return -ELOOP;
+
+	/* Device is already being bridged */
+	if (br_port_exists(dev))
+		return -EBUSY;
+
+	/* No bridging devices that dislike that (e.g. wireless) */
+	if (dev->priv_flags & IFF_DONT_BRIDGE)
+		return -EOPNOTSUPP;
+
+	p = new_nbp(br, dev);
+	if (IS_ERR(p))
+		return PTR_ERR(p);
+
+	call_netdevice_notifiers(NETDEV_JOIN, dev);
+
+	err = dev_set_allmulti(dev, 1);
+	if (err)
+		goto put_back;
+
+	err = kobject_init_and_add(&p->kobj, &brport_ktype, &(dev->dev.kobj),
+				   SYSFS_BRIDGE_PORT_ATTR);
+	if (err)
+		goto err1;
+
+	err = br_sysfs_addif(p);
+	if (err)
+		goto err2;
+
+	err = br_netpoll_enable(p);
+	if (err)
+		goto err3;
+
+	err = netdev_rx_handler_register(dev, br_handle_frame, p);
+	if (err)
+		goto err4;
+
+	dev->priv_flags |= IFF_BRIDGE_PORT;
+
+	err = netdev_master_upper_dev_link(dev, br->dev);
+	if (err)
+		goto err5;
+
+	dev_disable_lro(dev);
+
+	list_add_rcu(&p->list, &br->port_list);
+
+	nbp_update_port_count(br);
+
+	netdev_update_features(br->dev);
+
+	if (br->dev->needed_headroom < dev->needed_headroom)
+		br->dev->needed_headroom = dev->needed_headroom;
+
+	if (br_fdb_insert(br, p, dev->dev_addr, 0))
+		netdev_err(dev, "failed insert local address bridge forwarding table\n");
+
+	if (nbp_vlan_init(p))
+		netdev_err(dev, "failed to initialize vlan filtering on this port\n");
+
+	spin_lock_bh(&br->lock);
+	changed_addr = br_stp_recalculate_bridge_id(br);
+
+	if (netif_running(dev) && netif_oper_up(dev) &&
+	    (br->dev->flags & IFF_UP))
+		br_stp_enable_port(p);
+	spin_unlock_bh(&br->lock);
+
+	br_ifinfo_notify(RTM_NEWLINK, p);
+
+	if (changed_addr)
+		call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
+
+	dev_set_mtu(br->dev, br_min_mtu(br));
+
+	kobject_uevent(&p->kobj, KOBJ_ADD);
+
+	return 0;
+
+err5:
+	dev->priv_flags &= ~IFF_BRIDGE_PORT;
+	netdev_rx_handler_unregister(dev);
+err4:
+	br_netpoll_disable(p);
+err3:
+	sysfs_remove_link(br->ifobj, p->dev->name);
+err2:
+	kobject_put(&p->kobj);
+	p = NULL; /* kobject_put frees */
+err1:
+	dev_set_allmulti(dev, -1);
+put_back:
+	dev_put(dev);
+	kfree(p);
+	return err;
+}
+
+/* called with RTNL */
+int br_del_if(struct net_bridge *br, struct net_device *dev)
+{
+	struct net_bridge_port *p;
+	bool changed_addr;
+
+	p = br_port_get_rtnl(dev);
+	if (!p || p->br != br)
+		return -EINVAL;
+
+	/* Since more than one interface can be attached to a bridge,
+	 * there still maybe an alternate path for netconsole to use;
+	 * therefore there is no reason for a NETDEV_RELEASE event.
+	 */
+	del_nbp(p);
+
+	dev_set_mtu(br->dev, br_min_mtu(br));
+
+	spin_lock_bh(&br->lock);
+	changed_addr = br_stp_recalculate_bridge_id(br);
+	spin_unlock_bh(&br->lock);
+
+	if (changed_addr)
+		call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
+
+	netdev_update_features(br->dev);
+
+	return 0;
+}
+
+void br_port_flags_change(struct net_bridge_port *p, unsigned long mask)
+{
+	struct net_bridge *br = p->br;
+
+	if (mask & BR_AUTO_MASK)
+		nbp_update_port_count(br);
+}
diff --git a/kernel/net/bridge/br_input.c b/kernel/net/bridge/br_input.c
new file mode 100644
index 000000000..f921a5dce
--- /dev/null
+++ b/kernel/net/bridge/br_input.c
@@ -0,0 +1,315 @@
+/*
+ *	Handle incoming frames
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/neighbour.h>
+#include <net/arp.h>
+#include <linux/export.h>
+#include <linux/rculist.h>
+#include "br_private.h"
+
+/* Hook for brouter */
+br_should_route_hook_t __rcu *br_should_route_hook __read_mostly;
+EXPORT_SYMBOL(br_should_route_hook);
+
+static int br_pass_frame_up(struct sk_buff *skb)
+{
+	struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev;
+	struct net_bridge *br = netdev_priv(brdev);
+	struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
+	struct net_port_vlans *pv;
+
+	u64_stats_update_begin(&brstats->syncp);
+	brstats->rx_packets++;
+	brstats->rx_bytes += skb->len;
+	u64_stats_update_end(&brstats->syncp);
+
+	/* Bridge is just like any other port.  Make sure the
+	 * packet is allowed except in promisc modue when someone
+	 * may be running packet capture.
+	 */
+	pv = br_get_vlan_info(br);
+	if (!(brdev->flags & IFF_PROMISC) &&
+	    !br_allowed_egress(br, pv, skb)) {
+		kfree_skb(skb);
+		return NET_RX_DROP;
+	}
+
+	indev = skb->dev;
+	skb->dev = brdev;
+	skb = br_handle_vlan(br, pv, skb);
+	if (!skb)
+		return NET_RX_DROP;
+
+	return NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, NULL, skb,
+		       indev, NULL,
+		       netif_receive_skb_sk);
+}
+
+static void br_do_proxy_arp(struct sk_buff *skb, struct net_bridge *br,
+			    u16 vid, struct net_bridge_port *p)
+{
+	struct net_device *dev = br->dev;
+	struct neighbour *n;
+	struct arphdr *parp;
+	u8 *arpptr, *sha;
+	__be32 sip, tip;
+
+	BR_INPUT_SKB_CB(skb)->proxyarp_replied = false;
+
+	if (dev->flags & IFF_NOARP)
+		return;
+
+	if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
+		dev->stats.tx_dropped++;
+		return;
+	}
+	parp = arp_hdr(skb);
+
+	if (parp->ar_pro != htons(ETH_P_IP) ||
+	    parp->ar_op != htons(ARPOP_REQUEST) ||
+	    parp->ar_hln != dev->addr_len ||
+	    parp->ar_pln != 4)
+		return;
+
+	arpptr = (u8 *)parp + sizeof(struct arphdr);
+	sha = arpptr;
+	arpptr += dev->addr_len;	/* sha */
+	memcpy(&sip, arpptr, sizeof(sip));
+	arpptr += sizeof(sip);
+	arpptr += dev->addr_len;	/* tha */
+	memcpy(&tip, arpptr, sizeof(tip));
+
+	if (ipv4_is_loopback(tip) ||
+	    ipv4_is_multicast(tip))
+		return;
+
+	n = neigh_lookup(&arp_tbl, &tip, dev);
+	if (n) {
+		struct net_bridge_fdb_entry *f;
+
+		if (!(n->nud_state & NUD_VALID)) {
+			neigh_release(n);
+			return;
+		}
+
+		f = __br_fdb_get(br, n->ha, vid);
+		if (f && ((p->flags & BR_PROXYARP) ||
+			  (f->dst && (f->dst->flags & BR_PROXYARP_WIFI)))) {
+			arp_send(ARPOP_REPLY, ETH_P_ARP, sip, skb->dev, tip,
+				 sha, n->ha, sha);
+			BR_INPUT_SKB_CB(skb)->proxyarp_replied = true;
+		}
+
+		neigh_release(n);
+	}
+}
+
+/* note: already called with rcu_read_lock */
+int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb)
+{
+	const unsigned char *dest = eth_hdr(skb)->h_dest;
+	struct net_bridge_port *p = br_port_get_rcu(skb->dev);
+	struct net_bridge *br;
+	struct net_bridge_fdb_entry *dst;
+	struct net_bridge_mdb_entry *mdst;
+	struct sk_buff *skb2;
+	bool unicast = true;
+	u16 vid = 0;
+
+	if (!p || p->state == BR_STATE_DISABLED)
+		goto drop;
+
+	if (!br_allowed_ingress(p->br, nbp_get_vlan_info(p), skb, &vid))
+		goto out;
+
+	/* insert into forwarding database after filtering to avoid spoofing */
+	br = p->br;
+	if (p->flags & BR_LEARNING)
+		br_fdb_update(br, p, eth_hdr(skb)->h_source, vid, false);
+
+	if (!is_broadcast_ether_addr(dest) && is_multicast_ether_addr(dest) &&
+	    br_multicast_rcv(br, p, skb, vid))
+		goto drop;
+
+	if (p->state == BR_STATE_LEARNING)
+		goto drop;
+
+	BR_INPUT_SKB_CB(skb)->brdev = br->dev;
+
+	/* The packet skb2 goes to the local host (NULL to skip). */
+	skb2 = NULL;
+
+	if (br->dev->flags & IFF_PROMISC)
+		skb2 = skb;
+
+	dst = NULL;
+
+	if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP))
+		br_do_proxy_arp(skb, br, vid, p);
+
+	if (is_broadcast_ether_addr(dest)) {
+		skb2 = skb;
+		unicast = false;
+	} else if (is_multicast_ether_addr(dest)) {
+		mdst = br_mdb_get(br, skb, vid);
+		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
+		    br_multicast_querier_exists(br, eth_hdr(skb))) {
+			if ((mdst && mdst->mglist) ||
+			    br_multicast_is_router(br))
+				skb2 = skb;
+			br_multicast_forward(mdst, skb, skb2);
+			skb = NULL;
+			if (!skb2)
+				goto out;
+		} else
+			skb2 = skb;
+
+		unicast = false;
+		br->dev->stats.multicast++;
+	} else if ((dst = __br_fdb_get(br, dest, vid)) &&
+			dst->is_local) {
+		skb2 = skb;
+		/* Do not forward the packet since it's local. */
+		skb = NULL;
+	}
+
+	if (skb) {
+		if (dst) {
+			dst->used = jiffies;
+			br_forward(dst->dst, skb, skb2);
+		} else
+			br_flood_forward(br, skb, skb2, unicast);
+	}
+
+	if (skb2)
+		return br_pass_frame_up(skb2);
+
+out:
+	return 0;
+drop:
+	kfree_skb(skb);
+	goto out;
+}
+EXPORT_SYMBOL_GPL(br_handle_frame_finish);
+
+/* note: already called with rcu_read_lock */
+static int br_handle_local_finish(struct sock *sk, struct sk_buff *skb)
+{
+	struct net_bridge_port *p = br_port_get_rcu(skb->dev);
+	u16 vid = 0;
+
+	/* check if vlan is allowed, to avoid spoofing */
+	if (p->flags & BR_LEARNING && br_should_learn(p, skb, &vid))
+		br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid, false);
+	return 0;	 /* process further */
+}
+
+/*
+ * Return NULL if skb is handled
+ * note: already called with rcu_read_lock
+ */
+rx_handler_result_t br_handle_frame(struct sk_buff **pskb)
+{
+	struct net_bridge_port *p;
+	struct sk_buff *skb = *pskb;
+	const unsigned char *dest = eth_hdr(skb)->h_dest;
+	br_should_route_hook_t *rhook;
+
+	if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
+		return RX_HANDLER_PASS;
+
+	if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
+		goto drop;
+
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb)
+		return RX_HANDLER_CONSUMED;
+
+	p = br_port_get_rcu(skb->dev);
+
+	if (unlikely(is_link_local_ether_addr(dest))) {
+		u16 fwd_mask = p->br->group_fwd_mask_required;
+
+		/*
+		 * See IEEE 802.1D Table 7-10 Reserved addresses
+		 *
+		 * Assignment		 		Value
+		 * Bridge Group Address		01-80-C2-00-00-00
+		 * (MAC Control) 802.3		01-80-C2-00-00-01
+		 * (Link Aggregation) 802.3	01-80-C2-00-00-02
+		 * 802.1X PAE address		01-80-C2-00-00-03
+		 *
+		 * 802.1AB LLDP 		01-80-C2-00-00-0E
+		 *
+		 * Others reserved for future standardization
+		 */
+		switch (dest[5]) {
+		case 0x00:	/* Bridge Group Address */
+			/* If STP is turned off,
+			   then must forward to keep loop detection */
+			if (p->br->stp_enabled == BR_NO_STP ||
+			    fwd_mask & (1u << dest[5]))
+				goto forward;
+			break;
+
+		case 0x01:	/* IEEE MAC (Pause) */
+			goto drop;
+
+		default:
+			/* Allow selective forwarding for most other protocols */
+			fwd_mask |= p->br->group_fwd_mask;
+			if (fwd_mask & (1u << dest[5]))
+				goto forward;
+		}
+
+		/* Deliver packet to local host only */
+		if (NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, NULL, skb,
+			    skb->dev, NULL, br_handle_local_finish)) {
+			return RX_HANDLER_CONSUMED; /* consumed by filter */
+		} else {
+			*pskb = skb;
+			return RX_HANDLER_PASS;	/* continue processing */
+		}
+	}
+
+forward:
+	switch (p->state) {
+	case BR_STATE_FORWARDING:
+		rhook = rcu_dereference(br_should_route_hook);
+		if (rhook) {
+			if ((*rhook)(skb)) {
+				*pskb = skb;
+				return RX_HANDLER_PASS;
+			}
+			dest = eth_hdr(skb)->h_dest;
+		}
+		/* fall through */
+	case BR_STATE_LEARNING:
+		if (ether_addr_equal(p->br->dev->dev_addr, dest))
+			skb->pkt_type = PACKET_HOST;
+
+		NF_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, NULL, skb,
+			skb->dev, NULL,
+			br_handle_frame_finish);
+		break;
+	default:
+drop:
+		kfree_skb(skb);
+	}
+	return RX_HANDLER_CONSUMED;
+}
diff --git a/kernel/net/bridge/br_ioctl.c b/kernel/net/bridge/br_ioctl.c
new file mode 100644
index 000000000..8d423bc64
--- /dev/null
+++ b/kernel/net/bridge/br_ioctl.c
@@ -0,0 +1,394 @@
+/*
+ *	Ioctl handler
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/if_bridge.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <linux/times.h>
+#include <net/net_namespace.h>
+#include <asm/uaccess.h>
+#include "br_private.h"
+
+/* called with RTNL */
+static int get_bridge_ifindices(struct net *net, int *indices, int num)
+{
+	struct net_device *dev;
+	int i = 0;
+
+	for_each_netdev(net, dev) {
+		if (i >= num)
+			break;
+		if (dev->priv_flags & IFF_EBRIDGE)
+			indices[i++] = dev->ifindex;
+	}
+
+	return i;
+}
+
+/* called with RTNL */
+static void get_port_ifindices(struct net_bridge *br, int *ifindices, int num)
+{
+	struct net_bridge_port *p;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (p->port_no < num)
+			ifindices[p->port_no] = p->dev->ifindex;
+	}
+}
+
+/*
+ * Format up to a page worth of forwarding table entries
+ * userbuf -- where to copy result
+ * maxnum  -- maximum number of entries desired
+ *            (limited to a page for sanity)
+ * offset  -- number of records to skip
+ */
+static int get_fdb_entries(struct net_bridge *br, void __user *userbuf,
+			   unsigned long maxnum, unsigned long offset)
+{
+	int num;
+	void *buf;
+	size_t size;
+
+	/* Clamp size to PAGE_SIZE, test maxnum to avoid overflow */
+	if (maxnum > PAGE_SIZE/sizeof(struct __fdb_entry))
+		maxnum = PAGE_SIZE/sizeof(struct __fdb_entry);
+
+	size = maxnum * sizeof(struct __fdb_entry);
+
+	buf = kmalloc(size, GFP_USER);
+	if (!buf)
+		return -ENOMEM;
+
+	num = br_fdb_fillbuf(br, buf, maxnum, offset);
+	if (num > 0) {
+		if (copy_to_user(userbuf, buf, num*sizeof(struct __fdb_entry)))
+			num = -EFAULT;
+	}
+	kfree(buf);
+
+	return num;
+}
+
+/* called with RTNL */
+static int add_del_if(struct net_bridge *br, int ifindex, int isadd)
+{
+	struct net *net = dev_net(br->dev);
+	struct net_device *dev;
+	int ret;
+
+	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	dev = __dev_get_by_index(net, ifindex);
+	if (dev == NULL)
+		return -EINVAL;
+
+	if (isadd)
+		ret = br_add_if(br, dev);
+	else
+		ret = br_del_if(br, dev);
+
+	return ret;
+}
+
+/*
+ * Legacy ioctl's through SIOCDEVPRIVATE
+ * This interface is deprecated because it was too difficult to
+ * to do the translation for 32/64bit ioctl compatibility.
+ */
+static int old_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	unsigned long args[4];
+
+	if (copy_from_user(args, rq->ifr_data, sizeof(args)))
+		return -EFAULT;
+
+	switch (args[0]) {
+	case BRCTL_ADD_IF:
+	case BRCTL_DEL_IF:
+		return add_del_if(br, args[1], args[0] == BRCTL_ADD_IF);
+
+	case BRCTL_GET_BRIDGE_INFO:
+	{
+		struct __bridge_info b;
+
+		memset(&b, 0, sizeof(struct __bridge_info));
+		rcu_read_lock();
+		memcpy(&b.designated_root, &br->designated_root, 8);
+		memcpy(&b.bridge_id, &br->bridge_id, 8);
+		b.root_path_cost = br->root_path_cost;
+		b.max_age = jiffies_to_clock_t(br->max_age);
+		b.hello_time = jiffies_to_clock_t(br->hello_time);
+		b.forward_delay = br->forward_delay;
+		b.bridge_max_age = br->bridge_max_age;
+		b.bridge_hello_time = br->bridge_hello_time;
+		b.bridge_forward_delay = jiffies_to_clock_t(br->bridge_forward_delay);
+		b.topology_change = br->topology_change;
+		b.topology_change_detected = br->topology_change_detected;
+		b.root_port = br->root_port;
+
+		b.stp_enabled = (br->stp_enabled != BR_NO_STP);
+		b.ageing_time = jiffies_to_clock_t(br->ageing_time);
+		b.hello_timer_value = br_timer_value(&br->hello_timer);
+		b.tcn_timer_value = br_timer_value(&br->tcn_timer);
+		b.topology_change_timer_value = br_timer_value(&br->topology_change_timer);
+		b.gc_timer_value = br_timer_value(&br->gc_timer);
+		rcu_read_unlock();
+
+		if (copy_to_user((void __user *)args[1], &b, sizeof(b)))
+			return -EFAULT;
+
+		return 0;
+	}
+
+	case BRCTL_GET_PORT_LIST:
+	{
+		int num, *indices;
+
+		num = args[2];
+		if (num < 0)
+			return -EINVAL;
+		if (num == 0)
+			num = 256;
+		if (num > BR_MAX_PORTS)
+			num = BR_MAX_PORTS;
+
+		indices = kcalloc(num, sizeof(int), GFP_KERNEL);
+		if (indices == NULL)
+			return -ENOMEM;
+
+		get_port_ifindices(br, indices, num);
+		if (copy_to_user((void __user *)args[1], indices, num*sizeof(int)))
+			num =  -EFAULT;
+		kfree(indices);
+		return num;
+	}
+
+	case BRCTL_SET_BRIDGE_FORWARD_DELAY:
+		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		return br_set_forward_delay(br, args[1]);
+
+	case BRCTL_SET_BRIDGE_HELLO_TIME:
+		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		return br_set_hello_time(br, args[1]);
+
+	case BRCTL_SET_BRIDGE_MAX_AGE:
+		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		return br_set_max_age(br, args[1]);
+
+	case BRCTL_SET_AGEING_TIME:
+		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		br->ageing_time = clock_t_to_jiffies(args[1]);
+		return 0;
+
+	case BRCTL_GET_PORT_INFO:
+	{
+		struct __port_info p;
+		struct net_bridge_port *pt;
+
+		rcu_read_lock();
+		if ((pt = br_get_port(br, args[2])) == NULL) {
+			rcu_read_unlock();
+			return -EINVAL;
+		}
+
+		memset(&p, 0, sizeof(struct __port_info));
+		memcpy(&p.designated_root, &pt->designated_root, 8);
+		memcpy(&p.designated_bridge, &pt->designated_bridge, 8);
+		p.port_id = pt->port_id;
+		p.designated_port = pt->designated_port;
+		p.path_cost = pt->path_cost;
+		p.designated_cost = pt->designated_cost;
+		p.state = pt->state;
+		p.top_change_ack = pt->topology_change_ack;
+		p.config_pending = pt->config_pending;
+		p.message_age_timer_value = br_timer_value(&pt->message_age_timer);
+		p.forward_delay_timer_value = br_timer_value(&pt->forward_delay_timer);
+		p.hold_timer_value = br_timer_value(&pt->hold_timer);
+
+		rcu_read_unlock();
+
+		if (copy_to_user((void __user *)args[1], &p, sizeof(p)))
+			return -EFAULT;
+
+		return 0;
+	}
+
+	case BRCTL_SET_BRIDGE_STP_STATE:
+		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		br_stp_set_enabled(br, args[1]);
+		return 0;
+
+	case BRCTL_SET_BRIDGE_PRIORITY:
+		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		br_stp_set_bridge_priority(br, args[1]);
+		return 0;
+
+	case BRCTL_SET_PORT_PRIORITY:
+	{
+		struct net_bridge_port *p;
+		int ret;
+
+		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		spin_lock_bh(&br->lock);
+		if ((p = br_get_port(br, args[1])) == NULL)
+			ret = -EINVAL;
+		else
+			ret = br_stp_set_port_priority(p, args[2]);
+		spin_unlock_bh(&br->lock);
+		return ret;
+	}
+
+	case BRCTL_SET_PATH_COST:
+	{
+		struct net_bridge_port *p;
+		int ret;
+
+		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		spin_lock_bh(&br->lock);
+		if ((p = br_get_port(br, args[1])) == NULL)
+			ret = -EINVAL;
+		else
+			ret = br_stp_set_path_cost(p, args[2]);
+		spin_unlock_bh(&br->lock);
+
+		return ret;
+	}
+
+	case BRCTL_GET_FDB_ENTRIES:
+		return get_fdb_entries(br, (void __user *)args[1],
+				       args[2], args[3]);
+	}
+
+	return -EOPNOTSUPP;
+}
+
+static int old_deviceless(struct net *net, void __user *uarg)
+{
+	unsigned long args[3];
+
+	if (copy_from_user(args, uarg, sizeof(args)))
+		return -EFAULT;
+
+	switch (args[0]) {
+	case BRCTL_GET_VERSION:
+		return BRCTL_VERSION;
+
+	case BRCTL_GET_BRIDGES:
+	{
+		int *indices;
+		int ret = 0;
+
+		if (args[2] >= 2048)
+			return -ENOMEM;
+		indices = kcalloc(args[2], sizeof(int), GFP_KERNEL);
+		if (indices == NULL)
+			return -ENOMEM;
+
+		args[2] = get_bridge_ifindices(net, indices, args[2]);
+
+		ret = copy_to_user((void __user *)args[1], indices, args[2]*sizeof(int))
+			? -EFAULT : args[2];
+
+		kfree(indices);
+		return ret;
+	}
+
+	case BRCTL_ADD_BRIDGE:
+	case BRCTL_DEL_BRIDGE:
+	{
+		char buf[IFNAMSIZ];
+
+		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(buf, (void __user *)args[1], IFNAMSIZ))
+			return -EFAULT;
+
+		buf[IFNAMSIZ-1] = 0;
+
+		if (args[0] == BRCTL_ADD_BRIDGE)
+			return br_add_bridge(net, buf);
+
+		return br_del_bridge(net, buf);
+	}
+	}
+
+	return -EOPNOTSUPP;
+}
+
+int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *uarg)
+{
+	switch (cmd) {
+	case SIOCGIFBR:
+	case SIOCSIFBR:
+		return old_deviceless(net, uarg);
+
+	case SIOCBRADDBR:
+	case SIOCBRDELBR:
+	{
+		char buf[IFNAMSIZ];
+
+		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (copy_from_user(buf, uarg, IFNAMSIZ))
+			return -EFAULT;
+
+		buf[IFNAMSIZ-1] = 0;
+		if (cmd == SIOCBRADDBR)
+			return br_add_bridge(net, buf);
+
+		return br_del_bridge(net, buf);
+	}
+	}
+	return -EOPNOTSUPP;
+}
+
+int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	switch (cmd) {
+	case SIOCDEVPRIVATE:
+		return old_dev_ioctl(dev, rq, cmd);
+
+	case SIOCBRADDIF:
+	case SIOCBRDELIF:
+		return add_del_if(br, rq->ifr_ifindex, cmd == SIOCBRADDIF);
+
+	}
+
+	br_debug(br, "Bridge does not support ioctl 0x%x\n", cmd);
+	return -EOPNOTSUPP;
+}
diff --git a/kernel/net/bridge/br_mdb.c b/kernel/net/bridge/br_mdb.c
new file mode 100644
index 000000000..e29ad70b3
--- /dev/null
+++ b/kernel/net/bridge/br_mdb.c
@@ -0,0 +1,499 @@
+#include <linux/err.h>
+#include <linux/igmp.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/rculist.h>
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+#include <net/ip.h>
+#include <net/netlink.h>
+#if IS_ENABLED(CONFIG_IPV6)
+#include <net/ipv6.h>
+#include <net/addrconf.h>
+#endif
+
+#include "br_private.h"
+
+static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
+			       struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	struct net_bridge_port *p;
+	struct nlattr *nest;
+
+	if (!br->multicast_router || hlist_empty(&br->router_list))
+		return 0;
+
+	nest = nla_nest_start(skb, MDBA_ROUTER);
+	if (nest == NULL)
+		return -EMSGSIZE;
+
+	hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
+		if (p && nla_put_u32(skb, MDBA_ROUTER_PORT, p->dev->ifindex))
+			goto fail;
+	}
+
+	nla_nest_end(skb, nest);
+	return 0;
+fail:
+	nla_nest_cancel(skb, nest);
+	return -EMSGSIZE;
+}
+
+static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
+			    struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	struct net_bridge_mdb_htable *mdb;
+	struct nlattr *nest, *nest2;
+	int i, err = 0;
+	int idx = 0, s_idx = cb->args[1];
+
+	if (br->multicast_disabled)
+		return 0;
+
+	mdb = rcu_dereference(br->mdb);
+	if (!mdb)
+		return 0;
+
+	nest = nla_nest_start(skb, MDBA_MDB);
+	if (nest == NULL)
+		return -EMSGSIZE;
+
+	for (i = 0; i < mdb->max; i++) {
+		struct net_bridge_mdb_entry *mp;
+		struct net_bridge_port_group *p;
+		struct net_bridge_port_group __rcu **pp;
+		struct net_bridge_port *port;
+
+		hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) {
+			if (idx < s_idx)
+				goto skip;
+
+			nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
+			if (nest2 == NULL) {
+				err = -EMSGSIZE;
+				goto out;
+			}
+
+			for (pp = &mp->ports;
+			     (p = rcu_dereference(*pp)) != NULL;
+			      pp = &p->next) {
+				port = p->port;
+				if (port) {
+					struct br_mdb_entry e;
+					memset(&e, 0, sizeof(e));
+					e.ifindex = port->dev->ifindex;
+					e.state = p->state;
+					if (p->addr.proto == htons(ETH_P_IP))
+						e.addr.u.ip4 = p->addr.u.ip4;
+#if IS_ENABLED(CONFIG_IPV6)
+					if (p->addr.proto == htons(ETH_P_IPV6))
+						e.addr.u.ip6 = p->addr.u.ip6;
+#endif
+					e.addr.proto = p->addr.proto;
+					if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(e), &e)) {
+						nla_nest_cancel(skb, nest2);
+						err = -EMSGSIZE;
+						goto out;
+					}
+				}
+			}
+			nla_nest_end(skb, nest2);
+		skip:
+			idx++;
+		}
+	}
+
+out:
+	cb->args[1] = idx;
+	nla_nest_end(skb, nest);
+	return err;
+}
+
+static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct net_device *dev;
+	struct net *net = sock_net(skb->sk);
+	struct nlmsghdr *nlh = NULL;
+	int idx = 0, s_idx;
+
+	s_idx = cb->args[0];
+
+	rcu_read_lock();
+
+	/* In theory this could be wrapped to 0... */
+	cb->seq = net->dev_base_seq + br_mdb_rehash_seq;
+
+	for_each_netdev_rcu(net, dev) {
+		if (dev->priv_flags & IFF_EBRIDGE) {
+			struct br_port_msg *bpm;
+
+			if (idx < s_idx)
+				goto skip;
+
+			nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
+					cb->nlh->nlmsg_seq, RTM_GETMDB,
+					sizeof(*bpm), NLM_F_MULTI);
+			if (nlh == NULL)
+				break;
+
+			bpm = nlmsg_data(nlh);
+			memset(bpm, 0, sizeof(*bpm));
+			bpm->ifindex = dev->ifindex;
+			if (br_mdb_fill_info(skb, cb, dev) < 0)
+				goto out;
+			if (br_rports_fill_info(skb, cb, dev) < 0)
+				goto out;
+
+			cb->args[1] = 0;
+			nlmsg_end(skb, nlh);
+		skip:
+			idx++;
+		}
+	}
+
+out:
+	if (nlh)
+		nlmsg_end(skb, nlh);
+	rcu_read_unlock();
+	cb->args[0] = idx;
+	return skb->len;
+}
+
+static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
+				   struct net_device *dev,
+				   struct br_mdb_entry *entry, u32 pid,
+				   u32 seq, int type, unsigned int flags)
+{
+	struct nlmsghdr *nlh;
+	struct br_port_msg *bpm;
+	struct nlattr *nest, *nest2;
+
+	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
+	if (!nlh)
+		return -EMSGSIZE;
+
+	bpm = nlmsg_data(nlh);
+	memset(bpm, 0, sizeof(*bpm));
+	bpm->family  = AF_BRIDGE;
+	bpm->ifindex = dev->ifindex;
+	nest = nla_nest_start(skb, MDBA_MDB);
+	if (nest == NULL)
+		goto cancel;
+	nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
+	if (nest2 == NULL)
+		goto end;
+
+	if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry))
+		goto end;
+
+	nla_nest_end(skb, nest2);
+	nla_nest_end(skb, nest);
+	nlmsg_end(skb, nlh);
+	return 0;
+
+end:
+	nla_nest_end(skb, nest);
+cancel:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+static inline size_t rtnl_mdb_nlmsg_size(void)
+{
+	return NLMSG_ALIGN(sizeof(struct br_port_msg))
+		+ nla_total_size(sizeof(struct br_mdb_entry));
+}
+
+static void __br_mdb_notify(struct net_device *dev, struct br_mdb_entry *entry,
+			    int type)
+{
+	struct net *net = dev_net(dev);
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+
+	skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
+	if (!skb)
+		goto errout;
+
+	err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF);
+	if (err < 0) {
+		kfree_skb(skb);
+		goto errout;
+	}
+
+	rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
+	return;
+errout:
+	rtnl_set_sk_err(net, RTNLGRP_MDB, err);
+}
+
+void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
+		   struct br_ip *group, int type)
+{
+	struct br_mdb_entry entry;
+
+	memset(&entry, 0, sizeof(entry));
+	entry.ifindex = port->dev->ifindex;
+	entry.addr.proto = group->proto;
+	entry.addr.u.ip4 = group->u.ip4;
+#if IS_ENABLED(CONFIG_IPV6)
+	entry.addr.u.ip6 = group->u.ip6;
+#endif
+	__br_mdb_notify(dev, &entry, type);
+}
+
+static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
+{
+	if (entry->ifindex == 0)
+		return false;
+
+	if (entry->addr.proto == htons(ETH_P_IP)) {
+		if (!ipv4_is_multicast(entry->addr.u.ip4))
+			return false;
+		if (ipv4_is_local_multicast(entry->addr.u.ip4))
+			return false;
+#if IS_ENABLED(CONFIG_IPV6)
+	} else if (entry->addr.proto == htons(ETH_P_IPV6)) {
+		if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6))
+			return false;
+#endif
+	} else
+		return false;
+	if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
+		return false;
+
+	return true;
+}
+
+static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh,
+			struct net_device **pdev, struct br_mdb_entry **pentry)
+{
+	struct net *net = sock_net(skb->sk);
+	struct br_mdb_entry *entry;
+	struct br_port_msg *bpm;
+	struct nlattr *tb[MDBA_SET_ENTRY_MAX+1];
+	struct net_device *dev;
+	int err;
+
+	err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL);
+	if (err < 0)
+		return err;
+
+	bpm = nlmsg_data(nlh);
+	if (bpm->ifindex == 0) {
+		pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n");
+		return -EINVAL;
+	}
+
+	dev = __dev_get_by_index(net, bpm->ifindex);
+	if (dev == NULL) {
+		pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n");
+		return -ENODEV;
+	}
+
+	if (!(dev->priv_flags & IFF_EBRIDGE)) {
+		pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n");
+		return -EOPNOTSUPP;
+	}
+
+	*pdev = dev;
+
+	if (!tb[MDBA_SET_ENTRY] ||
+	    nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) {
+		pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n");
+		return -EINVAL;
+	}
+
+	entry = nla_data(tb[MDBA_SET_ENTRY]);
+	if (!is_valid_mdb_entry(entry)) {
+		pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n");
+		return -EINVAL;
+	}
+
+	*pentry = entry;
+	return 0;
+}
+
+static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
+			    struct br_ip *group, unsigned char state)
+{
+	struct net_bridge_mdb_entry *mp;
+	struct net_bridge_port_group *p;
+	struct net_bridge_port_group __rcu **pp;
+	struct net_bridge_mdb_htable *mdb;
+	int err;
+
+	mdb = mlock_dereference(br->mdb, br);
+	mp = br_mdb_ip_get(mdb, group);
+	if (!mp) {
+		mp = br_multicast_new_group(br, port, group);
+		err = PTR_ERR(mp);
+		if (IS_ERR(mp))
+			return err;
+	}
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, br)) != NULL;
+	     pp = &p->next) {
+		if (p->port == port)
+			return -EEXIST;
+		if ((unsigned long)p->port < (unsigned long)port)
+			break;
+	}
+
+	p = br_multicast_new_port_group(port, group, *pp, state);
+	if (unlikely(!p))
+		return -ENOMEM;
+	rcu_assign_pointer(*pp, p);
+
+	br_mdb_notify(br->dev, port, group, RTM_NEWMDB);
+	return 0;
+}
+
+static int __br_mdb_add(struct net *net, struct net_bridge *br,
+			struct br_mdb_entry *entry)
+{
+	struct br_ip ip;
+	struct net_device *dev;
+	struct net_bridge_port *p;
+	int ret;
+
+	if (!netif_running(br->dev) || br->multicast_disabled)
+		return -EINVAL;
+
+	dev = __dev_get_by_index(net, entry->ifindex);
+	if (!dev)
+		return -ENODEV;
+
+	p = br_port_get_rtnl(dev);
+	if (!p || p->br != br || p->state == BR_STATE_DISABLED)
+		return -EINVAL;
+
+	ip.proto = entry->addr.proto;
+	if (ip.proto == htons(ETH_P_IP))
+		ip.u.ip4 = entry->addr.u.ip4;
+#if IS_ENABLED(CONFIG_IPV6)
+	else
+		ip.u.ip6 = entry->addr.u.ip6;
+#endif
+
+	spin_lock_bh(&br->multicast_lock);
+	ret = br_mdb_add_group(br, p, &ip, entry->state);
+	spin_unlock_bh(&br->multicast_lock);
+	return ret;
+}
+
+static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+	struct net *net = sock_net(skb->sk);
+	struct br_mdb_entry *entry;
+	struct net_device *dev;
+	struct net_bridge *br;
+	int err;
+
+	err = br_mdb_parse(skb, nlh, &dev, &entry);
+	if (err < 0)
+		return err;
+
+	br = netdev_priv(dev);
+
+	err = __br_mdb_add(net, br, entry);
+	if (!err)
+		__br_mdb_notify(dev, entry, RTM_NEWMDB);
+	return err;
+}
+
+static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
+{
+	struct net_bridge_mdb_htable *mdb;
+	struct net_bridge_mdb_entry *mp;
+	struct net_bridge_port_group *p;
+	struct net_bridge_port_group __rcu **pp;
+	struct br_ip ip;
+	int err = -EINVAL;
+
+	if (!netif_running(br->dev) || br->multicast_disabled)
+		return -EINVAL;
+
+	ip.proto = entry->addr.proto;
+	if (ip.proto == htons(ETH_P_IP)) {
+		if (timer_pending(&br->ip4_other_query.timer))
+			return -EBUSY;
+
+		ip.u.ip4 = entry->addr.u.ip4;
+#if IS_ENABLED(CONFIG_IPV6)
+	} else {
+		if (timer_pending(&br->ip6_other_query.timer))
+			return -EBUSY;
+
+		ip.u.ip6 = entry->addr.u.ip6;
+#endif
+	}
+
+	spin_lock_bh(&br->multicast_lock);
+	mdb = mlock_dereference(br->mdb, br);
+
+	mp = br_mdb_ip_get(mdb, &ip);
+	if (!mp)
+		goto unlock;
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, br)) != NULL;
+	     pp = &p->next) {
+		if (!p->port || p->port->dev->ifindex != entry->ifindex)
+			continue;
+
+		if (p->port->state == BR_STATE_DISABLED)
+			goto unlock;
+
+		rcu_assign_pointer(*pp, p->next);
+		hlist_del_init(&p->mglist);
+		del_timer(&p->timer);
+		call_rcu_bh(&p->rcu, br_multicast_free_pg);
+		err = 0;
+
+		if (!mp->ports && !mp->mglist &&
+		    netif_running(br->dev))
+			mod_timer(&mp->timer, jiffies);
+		break;
+	}
+
+unlock:
+	spin_unlock_bh(&br->multicast_lock);
+	return err;
+}
+
+static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+	struct net_device *dev;
+	struct br_mdb_entry *entry;
+	struct net_bridge *br;
+	int err;
+
+	err = br_mdb_parse(skb, nlh, &dev, &entry);
+	if (err < 0)
+		return err;
+
+	br = netdev_priv(dev);
+
+	err = __br_mdb_del(br, entry);
+	if (!err)
+		__br_mdb_notify(dev, entry, RTM_DELMDB);
+	return err;
+}
+
+void br_mdb_init(void)
+{
+	rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL);
+	rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL);
+	rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL);
+}
+
+void br_mdb_uninit(void)
+{
+	rtnl_unregister(PF_BRIDGE, RTM_GETMDB);
+	rtnl_unregister(PF_BRIDGE, RTM_NEWMDB);
+	rtnl_unregister(PF_BRIDGE, RTM_DELMDB);
+}
diff --git a/kernel/net/bridge/br_multicast.c b/kernel/net/bridge/br_multicast.c
new file mode 100644
index 000000000..ff667e18b
--- /dev/null
+++ b/kernel/net/bridge/br_multicast.c
@@ -0,0 +1,2301 @@
+/*
+ * Bridge multicast support.
+ *
+ * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/if_ether.h>
+#include <linux/igmp.h>
+#include <linux/jhash.h>
+#include <linux/kernel.h>
+#include <linux/log2.h>
+#include <linux/netdevice.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/random.h>
+#include <linux/rculist.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/inetdevice.h>
+#include <net/ip.h>
+#if IS_ENABLED(CONFIG_IPV6)
+#include <net/ipv6.h>
+#include <net/mld.h>
+#include <net/ip6_checksum.h>
+#include <net/addrconf.h>
+#endif
+
+#include "br_private.h"
+
+static void br_multicast_start_querier(struct net_bridge *br,
+				       struct bridge_mcast_own_query *query);
+unsigned int br_mdb_rehash_seq;
+
+static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
+{
+	if (a->proto != b->proto)
+		return 0;
+	if (a->vid != b->vid)
+		return 0;
+	switch (a->proto) {
+	case htons(ETH_P_IP):
+		return a->u.ip4 == b->u.ip4;
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		return ipv6_addr_equal(&a->u.ip6, &b->u.ip6);
+#endif
+	}
+	return 0;
+}
+
+static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip,
+				__u16 vid)
+{
+	return jhash_2words((__force u32)ip, vid, mdb->secret) & (mdb->max - 1);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb,
+				const struct in6_addr *ip,
+				__u16 vid)
+{
+	return jhash_2words(ipv6_addr_hash(ip), vid,
+			    mdb->secret) & (mdb->max - 1);
+}
+#endif
+
+static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb,
+			     struct br_ip *ip)
+{
+	switch (ip->proto) {
+	case htons(ETH_P_IP):
+		return __br_ip4_hash(mdb, ip->u.ip4, ip->vid);
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		return __br_ip6_hash(mdb, &ip->u.ip6, ip->vid);
+#endif
+	}
+	return 0;
+}
+
+static struct net_bridge_mdb_entry *__br_mdb_ip_get(
+	struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash)
+{
+	struct net_bridge_mdb_entry *mp;
+
+	hlist_for_each_entry_rcu(mp, &mdb->mhash[hash], hlist[mdb->ver]) {
+		if (br_ip_equal(&mp->addr, dst))
+			return mp;
+	}
+
+	return NULL;
+}
+
+struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge_mdb_htable *mdb,
+					   struct br_ip *dst)
+{
+	if (!mdb)
+		return NULL;
+
+	return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst));
+}
+
+static struct net_bridge_mdb_entry *br_mdb_ip4_get(
+	struct net_bridge_mdb_htable *mdb, __be32 dst, __u16 vid)
+{
+	struct br_ip br_dst;
+
+	br_dst.u.ip4 = dst;
+	br_dst.proto = htons(ETH_P_IP);
+	br_dst.vid = vid;
+
+	return br_mdb_ip_get(mdb, &br_dst);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static struct net_bridge_mdb_entry *br_mdb_ip6_get(
+	struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst,
+	__u16 vid)
+{
+	struct br_ip br_dst;
+
+	br_dst.u.ip6 = *dst;
+	br_dst.proto = htons(ETH_P_IPV6);
+	br_dst.vid = vid;
+
+	return br_mdb_ip_get(mdb, &br_dst);
+}
+#endif
+
+struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
+					struct sk_buff *skb, u16 vid)
+{
+	struct net_bridge_mdb_htable *mdb = rcu_dereference(br->mdb);
+	struct br_ip ip;
+
+	if (br->multicast_disabled)
+		return NULL;
+
+	if (BR_INPUT_SKB_CB(skb)->igmp)
+		return NULL;
+
+	ip.proto = skb->protocol;
+	ip.vid = vid;
+
+	switch (skb->protocol) {
+	case htons(ETH_P_IP):
+		ip.u.ip4 = ip_hdr(skb)->daddr;
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		ip.u.ip6 = ipv6_hdr(skb)->daddr;
+		break;
+#endif
+	default:
+		return NULL;
+	}
+
+	return br_mdb_ip_get(mdb, &ip);
+}
+
+static void br_mdb_free(struct rcu_head *head)
+{
+	struct net_bridge_mdb_htable *mdb =
+		container_of(head, struct net_bridge_mdb_htable, rcu);
+	struct net_bridge_mdb_htable *old = mdb->old;
+
+	mdb->old = NULL;
+	kfree(old->mhash);
+	kfree(old);
+}
+
+static int br_mdb_copy(struct net_bridge_mdb_htable *new,
+		       struct net_bridge_mdb_htable *old,
+		       int elasticity)
+{
+	struct net_bridge_mdb_entry *mp;
+	int maxlen;
+	int len;
+	int i;
+
+	for (i = 0; i < old->max; i++)
+		hlist_for_each_entry(mp, &old->mhash[i], hlist[old->ver])
+			hlist_add_head(&mp->hlist[new->ver],
+				       &new->mhash[br_ip_hash(new, &mp->addr)]);
+
+	if (!elasticity)
+		return 0;
+
+	maxlen = 0;
+	for (i = 0; i < new->max; i++) {
+		len = 0;
+		hlist_for_each_entry(mp, &new->mhash[i], hlist[new->ver])
+			len++;
+		if (len > maxlen)
+			maxlen = len;
+	}
+
+	return maxlen > elasticity ? -EINVAL : 0;
+}
+
+void br_multicast_free_pg(struct rcu_head *head)
+{
+	struct net_bridge_port_group *p =
+		container_of(head, struct net_bridge_port_group, rcu);
+
+	kfree(p);
+}
+
+static void br_multicast_free_group(struct rcu_head *head)
+{
+	struct net_bridge_mdb_entry *mp =
+		container_of(head, struct net_bridge_mdb_entry, rcu);
+
+	kfree(mp);
+}
+
+static void br_multicast_group_expired(unsigned long data)
+{
+	struct net_bridge_mdb_entry *mp = (void *)data;
+	struct net_bridge *br = mp->br;
+	struct net_bridge_mdb_htable *mdb;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) || timer_pending(&mp->timer))
+		goto out;
+
+	mp->mglist = false;
+
+	if (mp->ports)
+		goto out;
+
+	mdb = mlock_dereference(br->mdb, br);
+
+	hlist_del_rcu(&mp->hlist[mdb->ver]);
+	mdb->size--;
+
+	call_rcu_bh(&mp->rcu, br_multicast_free_group);
+
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_multicast_del_pg(struct net_bridge *br,
+				struct net_bridge_port_group *pg)
+{
+	struct net_bridge_mdb_htable *mdb;
+	struct net_bridge_mdb_entry *mp;
+	struct net_bridge_port_group *p;
+	struct net_bridge_port_group __rcu **pp;
+
+	mdb = mlock_dereference(br->mdb, br);
+
+	mp = br_mdb_ip_get(mdb, &pg->addr);
+	if (WARN_ON(!mp))
+		return;
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, br)) != NULL;
+	     pp = &p->next) {
+		if (p != pg)
+			continue;
+
+		rcu_assign_pointer(*pp, p->next);
+		hlist_del_init(&p->mglist);
+		del_timer(&p->timer);
+		call_rcu_bh(&p->rcu, br_multicast_free_pg);
+
+		if (!mp->ports && !mp->mglist &&
+		    netif_running(br->dev))
+			mod_timer(&mp->timer, jiffies);
+
+		return;
+	}
+
+	WARN_ON(1);
+}
+
+static void br_multicast_port_group_expired(unsigned long data)
+{
+	struct net_bridge_port_group *pg = (void *)data;
+	struct net_bridge *br = pg->port->br;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
+	    hlist_unhashed(&pg->mglist) || pg->state & MDB_PERMANENT)
+		goto out;
+
+	br_multicast_del_pg(br, pg);
+
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu **mdbp, int max,
+			 int elasticity)
+{
+	struct net_bridge_mdb_htable *old = rcu_dereference_protected(*mdbp, 1);
+	struct net_bridge_mdb_htable *mdb;
+	int err;
+
+	mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC);
+	if (!mdb)
+		return -ENOMEM;
+
+	mdb->max = max;
+	mdb->old = old;
+
+	mdb->mhash = kzalloc(max * sizeof(*mdb->mhash), GFP_ATOMIC);
+	if (!mdb->mhash) {
+		kfree(mdb);
+		return -ENOMEM;
+	}
+
+	mdb->size = old ? old->size : 0;
+	mdb->ver = old ? old->ver ^ 1 : 0;
+
+	if (!old || elasticity)
+		get_random_bytes(&mdb->secret, sizeof(mdb->secret));
+	else
+		mdb->secret = old->secret;
+
+	if (!old)
+		goto out;
+
+	err = br_mdb_copy(mdb, old, elasticity);
+	if (err) {
+		kfree(mdb->mhash);
+		kfree(mdb);
+		return err;
+	}
+
+	br_mdb_rehash_seq++;
+	call_rcu_bh(&mdb->rcu, br_mdb_free);
+
+out:
+	rcu_assign_pointer(*mdbp, mdb);
+
+	return 0;
+}
+
+static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
+						    __be32 group)
+{
+	struct sk_buff *skb;
+	struct igmphdr *ih;
+	struct ethhdr *eth;
+	struct iphdr *iph;
+
+	skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) +
+						 sizeof(*ih) + 4);
+	if (!skb)
+		goto out;
+
+	skb->protocol = htons(ETH_P_IP);
+
+	skb_reset_mac_header(skb);
+	eth = eth_hdr(skb);
+
+	ether_addr_copy(eth->h_source, br->dev->dev_addr);
+	eth->h_dest[0] = 1;
+	eth->h_dest[1] = 0;
+	eth->h_dest[2] = 0x5e;
+	eth->h_dest[3] = 0;
+	eth->h_dest[4] = 0;
+	eth->h_dest[5] = 1;
+	eth->h_proto = htons(ETH_P_IP);
+	skb_put(skb, sizeof(*eth));
+
+	skb_set_network_header(skb, skb->len);
+	iph = ip_hdr(skb);
+
+	iph->version = 4;
+	iph->ihl = 6;
+	iph->tos = 0xc0;
+	iph->tot_len = htons(sizeof(*iph) + sizeof(*ih) + 4);
+	iph->id = 0;
+	iph->frag_off = htons(IP_DF);
+	iph->ttl = 1;
+	iph->protocol = IPPROTO_IGMP;
+	iph->saddr = br->multicast_query_use_ifaddr ?
+		     inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
+	iph->daddr = htonl(INADDR_ALLHOSTS_GROUP);
+	((u8 *)&iph[1])[0] = IPOPT_RA;
+	((u8 *)&iph[1])[1] = 4;
+	((u8 *)&iph[1])[2] = 0;
+	((u8 *)&iph[1])[3] = 0;
+	ip_send_check(iph);
+	skb_put(skb, 24);
+
+	skb_set_transport_header(skb, skb->len);
+	ih = igmp_hdr(skb);
+	ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
+	ih->code = (group ? br->multicast_last_member_interval :
+			    br->multicast_query_response_interval) /
+		   (HZ / IGMP_TIMER_SCALE);
+	ih->group = group;
+	ih->csum = 0;
+	ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr));
+	skb_put(skb, sizeof(*ih));
+
+	__skb_pull(skb, sizeof(*eth));
+
+out:
+	return skb;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
+						    const struct in6_addr *group)
+{
+	struct sk_buff *skb;
+	struct ipv6hdr *ip6h;
+	struct mld_msg *mldq;
+	struct ethhdr *eth;
+	u8 *hopopt;
+	unsigned long interval;
+
+	skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) +
+						 8 + sizeof(*mldq));
+	if (!skb)
+		goto out;
+
+	skb->protocol = htons(ETH_P_IPV6);
+
+	/* Ethernet header */
+	skb_reset_mac_header(skb);
+	eth = eth_hdr(skb);
+
+	ether_addr_copy(eth->h_source, br->dev->dev_addr);
+	eth->h_proto = htons(ETH_P_IPV6);
+	skb_put(skb, sizeof(*eth));
+
+	/* IPv6 header + HbH option */
+	skb_set_network_header(skb, skb->len);
+	ip6h = ipv6_hdr(skb);
+
+	*(__force __be32 *)ip6h = htonl(0x60000000);
+	ip6h->payload_len = htons(8 + sizeof(*mldq));
+	ip6h->nexthdr = IPPROTO_HOPOPTS;
+	ip6h->hop_limit = 1;
+	ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
+	if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
+			       &ip6h->saddr)) {
+		kfree_skb(skb);
+		return NULL;
+	}
+	ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
+
+	hopopt = (u8 *)(ip6h + 1);
+	hopopt[0] = IPPROTO_ICMPV6;		/* next hdr */
+	hopopt[1] = 0;				/* length of HbH */
+	hopopt[2] = IPV6_TLV_ROUTERALERT;	/* Router Alert */
+	hopopt[3] = 2;				/* Length of RA Option */
+	hopopt[4] = 0;				/* Type = 0x0000 (MLD) */
+	hopopt[5] = 0;
+	hopopt[6] = IPV6_TLV_PAD1;		/* Pad1 */
+	hopopt[7] = IPV6_TLV_PAD1;		/* Pad1 */
+
+	skb_put(skb, sizeof(*ip6h) + 8);
+
+	/* ICMPv6 */
+	skb_set_transport_header(skb, skb->len);
+	mldq = (struct mld_msg *) icmp6_hdr(skb);
+
+	interval = ipv6_addr_any(group) ?
+			br->multicast_query_response_interval :
+			br->multicast_last_member_interval;
+
+	mldq->mld_type = ICMPV6_MGM_QUERY;
+	mldq->mld_code = 0;
+	mldq->mld_cksum = 0;
+	mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
+	mldq->mld_reserved = 0;
+	mldq->mld_mca = *group;
+
+	/* checksum */
+	mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
+					  sizeof(*mldq), IPPROTO_ICMPV6,
+					  csum_partial(mldq,
+						       sizeof(*mldq), 0));
+	skb_put(skb, sizeof(*mldq));
+
+	__skb_pull(skb, sizeof(*eth));
+
+out:
+	return skb;
+}
+#endif
+
+static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
+						struct br_ip *addr)
+{
+	switch (addr->proto) {
+	case htons(ETH_P_IP):
+		return br_ip4_multicast_alloc_query(br, addr->u.ip4);
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		return br_ip6_multicast_alloc_query(br, &addr->u.ip6);
+#endif
+	}
+	return NULL;
+}
+
+static struct net_bridge_mdb_entry *br_multicast_get_group(
+	struct net_bridge *br, struct net_bridge_port *port,
+	struct br_ip *group, int hash)
+{
+	struct net_bridge_mdb_htable *mdb;
+	struct net_bridge_mdb_entry *mp;
+	unsigned int count = 0;
+	unsigned int max;
+	int elasticity;
+	int err;
+
+	mdb = rcu_dereference_protected(br->mdb, 1);
+	hlist_for_each_entry(mp, &mdb->mhash[hash], hlist[mdb->ver]) {
+		count++;
+		if (unlikely(br_ip_equal(group, &mp->addr)))
+			return mp;
+	}
+
+	elasticity = 0;
+	max = mdb->max;
+
+	if (unlikely(count > br->hash_elasticity && count)) {
+		if (net_ratelimit())
+			br_info(br, "Multicast hash table "
+				"chain limit reached: %s\n",
+				port ? port->dev->name : br->dev->name);
+
+		elasticity = br->hash_elasticity;
+	}
+
+	if (mdb->size >= max) {
+		max *= 2;
+		if (unlikely(max > br->hash_max)) {
+			br_warn(br, "Multicast hash table maximum of %d "
+				"reached, disabling snooping: %s\n",
+				br->hash_max,
+				port ? port->dev->name : br->dev->name);
+			err = -E2BIG;
+disable:
+			br->multicast_disabled = 1;
+			goto err;
+		}
+	}
+
+	if (max > mdb->max || elasticity) {
+		if (mdb->old) {
+			if (net_ratelimit())
+				br_info(br, "Multicast hash table "
+					"on fire: %s\n",
+					port ? port->dev->name : br->dev->name);
+			err = -EEXIST;
+			goto err;
+		}
+
+		err = br_mdb_rehash(&br->mdb, max, elasticity);
+		if (err) {
+			br_warn(br, "Cannot rehash multicast "
+				"hash table, disabling snooping: %s, %d, %d\n",
+				port ? port->dev->name : br->dev->name,
+				mdb->size, err);
+			goto disable;
+		}
+
+		err = -EAGAIN;
+		goto err;
+	}
+
+	return NULL;
+
+err:
+	mp = ERR_PTR(err);
+	return mp;
+}
+
+struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
+	struct net_bridge_port *port, struct br_ip *group)
+{
+	struct net_bridge_mdb_htable *mdb;
+	struct net_bridge_mdb_entry *mp;
+	int hash;
+	int err;
+
+	mdb = rcu_dereference_protected(br->mdb, 1);
+	if (!mdb) {
+		err = br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0);
+		if (err)
+			return ERR_PTR(err);
+		goto rehash;
+	}
+
+	hash = br_ip_hash(mdb, group);
+	mp = br_multicast_get_group(br, port, group, hash);
+	switch (PTR_ERR(mp)) {
+	case 0:
+		break;
+
+	case -EAGAIN:
+rehash:
+		mdb = rcu_dereference_protected(br->mdb, 1);
+		hash = br_ip_hash(mdb, group);
+		break;
+
+	default:
+		goto out;
+	}
+
+	mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
+	if (unlikely(!mp))
+		return ERR_PTR(-ENOMEM);
+
+	mp->br = br;
+	mp->addr = *group;
+	setup_timer(&mp->timer, br_multicast_group_expired,
+		    (unsigned long)mp);
+
+	hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]);
+	mdb->size++;
+
+out:
+	return mp;
+}
+
+struct net_bridge_port_group *br_multicast_new_port_group(
+			struct net_bridge_port *port,
+			struct br_ip *group,
+			struct net_bridge_port_group __rcu *next,
+			unsigned char state)
+{
+	struct net_bridge_port_group *p;
+
+	p = kzalloc(sizeof(*p), GFP_ATOMIC);
+	if (unlikely(!p))
+		return NULL;
+
+	p->addr = *group;
+	p->port = port;
+	p->state = state;
+	rcu_assign_pointer(p->next, next);
+	hlist_add_head(&p->mglist, &port->mglist);
+	setup_timer(&p->timer, br_multicast_port_group_expired,
+		    (unsigned long)p);
+	return p;
+}
+
+static int br_multicast_add_group(struct net_bridge *br,
+				  struct net_bridge_port *port,
+				  struct br_ip *group)
+{
+	struct net_bridge_mdb_entry *mp;
+	struct net_bridge_port_group *p;
+	struct net_bridge_port_group __rcu **pp;
+	unsigned long now = jiffies;
+	int err;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) ||
+	    (port && port->state == BR_STATE_DISABLED))
+		goto out;
+
+	mp = br_multicast_new_group(br, port, group);
+	err = PTR_ERR(mp);
+	if (IS_ERR(mp))
+		goto err;
+
+	if (!port) {
+		mp->mglist = true;
+		mod_timer(&mp->timer, now + br->multicast_membership_interval);
+		goto out;
+	}
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, br)) != NULL;
+	     pp = &p->next) {
+		if (p->port == port)
+			goto found;
+		if ((unsigned long)p->port < (unsigned long)port)
+			break;
+	}
+
+	p = br_multicast_new_port_group(port, group, *pp, MDB_TEMPORARY);
+	if (unlikely(!p))
+		goto err;
+	rcu_assign_pointer(*pp, p);
+	br_mdb_notify(br->dev, port, group, RTM_NEWMDB);
+
+found:
+	mod_timer(&p->timer, now + br->multicast_membership_interval);
+out:
+	err = 0;
+
+err:
+	spin_unlock(&br->multicast_lock);
+	return err;
+}
+
+static int br_ip4_multicast_add_group(struct net_bridge *br,
+				      struct net_bridge_port *port,
+				      __be32 group,
+				      __u16 vid)
+{
+	struct br_ip br_group;
+
+	if (ipv4_is_local_multicast(group))
+		return 0;
+
+	br_group.u.ip4 = group;
+	br_group.proto = htons(ETH_P_IP);
+	br_group.vid = vid;
+
+	return br_multicast_add_group(br, port, &br_group);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int br_ip6_multicast_add_group(struct net_bridge *br,
+				      struct net_bridge_port *port,
+				      const struct in6_addr *group,
+				      __u16 vid)
+{
+	struct br_ip br_group;
+
+	if (ipv6_addr_is_ll_all_nodes(group))
+		return 0;
+
+	br_group.u.ip6 = *group;
+	br_group.proto = htons(ETH_P_IPV6);
+	br_group.vid = vid;
+
+	return br_multicast_add_group(br, port, &br_group);
+}
+#endif
+
+static void br_multicast_router_expired(unsigned long data)
+{
+	struct net_bridge_port *port = (void *)data;
+	struct net_bridge *br = port->br;
+
+	spin_lock(&br->multicast_lock);
+	if (port->multicast_router != 1 ||
+	    timer_pending(&port->multicast_router_timer) ||
+	    hlist_unhashed(&port->rlist))
+		goto out;
+
+	hlist_del_init_rcu(&port->rlist);
+
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_multicast_local_router_expired(unsigned long data)
+{
+}
+
+static void br_multicast_querier_expired(struct net_bridge *br,
+					 struct bridge_mcast_own_query *query)
+{
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) || br->multicast_disabled)
+		goto out;
+
+	br_multicast_start_querier(br, query);
+
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_ip4_multicast_querier_expired(unsigned long data)
+{
+	struct net_bridge *br = (void *)data;
+
+	br_multicast_querier_expired(br, &br->ip4_own_query);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_querier_expired(unsigned long data)
+{
+	struct net_bridge *br = (void *)data;
+
+	br_multicast_querier_expired(br, &br->ip6_own_query);
+}
+#endif
+
+static void br_multicast_select_own_querier(struct net_bridge *br,
+					    struct br_ip *ip,
+					    struct sk_buff *skb)
+{
+	if (ip->proto == htons(ETH_P_IP))
+		br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr;
+#if IS_ENABLED(CONFIG_IPV6)
+	else
+		br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr;
+#endif
+}
+
+static void __br_multicast_send_query(struct net_bridge *br,
+				      struct net_bridge_port *port,
+				      struct br_ip *ip)
+{
+	struct sk_buff *skb;
+
+	skb = br_multicast_alloc_query(br, ip);
+	if (!skb)
+		return;
+
+	if (port) {
+		skb->dev = port->dev;
+		NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, NULL, skb,
+			NULL, skb->dev,
+			br_dev_queue_push_xmit);
+	} else {
+		br_multicast_select_own_querier(br, ip, skb);
+		netif_rx(skb);
+	}
+}
+
+static void br_multicast_send_query(struct net_bridge *br,
+				    struct net_bridge_port *port,
+				    struct bridge_mcast_own_query *own_query)
+{
+	unsigned long time;
+	struct br_ip br_group;
+	struct bridge_mcast_other_query *other_query = NULL;
+
+	if (!netif_running(br->dev) || br->multicast_disabled ||
+	    !br->multicast_querier)
+		return;
+
+	memset(&br_group.u, 0, sizeof(br_group.u));
+
+	if (port ? (own_query == &port->ip4_own_query) :
+		   (own_query == &br->ip4_own_query)) {
+		other_query = &br->ip4_other_query;
+		br_group.proto = htons(ETH_P_IP);
+#if IS_ENABLED(CONFIG_IPV6)
+	} else {
+		other_query = &br->ip6_other_query;
+		br_group.proto = htons(ETH_P_IPV6);
+#endif
+	}
+
+	if (!other_query || timer_pending(&other_query->timer))
+		return;
+
+	__br_multicast_send_query(br, port, &br_group);
+
+	time = jiffies;
+	time += own_query->startup_sent < br->multicast_startup_query_count ?
+		br->multicast_startup_query_interval :
+		br->multicast_query_interval;
+	mod_timer(&own_query->timer, time);
+}
+
+static void
+br_multicast_port_query_expired(struct net_bridge_port *port,
+				struct bridge_mcast_own_query *query)
+{
+	struct net_bridge *br = port->br;
+
+	spin_lock(&br->multicast_lock);
+	if (port->state == BR_STATE_DISABLED ||
+	    port->state == BR_STATE_BLOCKING)
+		goto out;
+
+	if (query->startup_sent < br->multicast_startup_query_count)
+		query->startup_sent++;
+
+	br_multicast_send_query(port->br, port, query);
+
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_ip4_multicast_port_query_expired(unsigned long data)
+{
+	struct net_bridge_port *port = (void *)data;
+
+	br_multicast_port_query_expired(port, &port->ip4_own_query);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_port_query_expired(unsigned long data)
+{
+	struct net_bridge_port *port = (void *)data;
+
+	br_multicast_port_query_expired(port, &port->ip6_own_query);
+}
+#endif
+
+void br_multicast_add_port(struct net_bridge_port *port)
+{
+	port->multicast_router = 1;
+
+	setup_timer(&port->multicast_router_timer, br_multicast_router_expired,
+		    (unsigned long)port);
+	setup_timer(&port->ip4_own_query.timer,
+		    br_ip4_multicast_port_query_expired, (unsigned long)port);
+#if IS_ENABLED(CONFIG_IPV6)
+	setup_timer(&port->ip6_own_query.timer,
+		    br_ip6_multicast_port_query_expired, (unsigned long)port);
+#endif
+}
+
+void br_multicast_del_port(struct net_bridge_port *port)
+{
+	del_timer_sync(&port->multicast_router_timer);
+}
+
+static void br_multicast_enable(struct bridge_mcast_own_query *query)
+{
+	query->startup_sent = 0;
+
+	if (try_to_del_timer_sync(&query->timer) >= 0 ||
+	    del_timer(&query->timer))
+		mod_timer(&query->timer, jiffies);
+}
+
+void br_multicast_enable_port(struct net_bridge_port *port)
+{
+	struct net_bridge *br = port->br;
+
+	spin_lock(&br->multicast_lock);
+	if (br->multicast_disabled || !netif_running(br->dev))
+		goto out;
+
+	br_multicast_enable(&port->ip4_own_query);
+#if IS_ENABLED(CONFIG_IPV6)
+	br_multicast_enable(&port->ip6_own_query);
+#endif
+
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+void br_multicast_disable_port(struct net_bridge_port *port)
+{
+	struct net_bridge *br = port->br;
+	struct net_bridge_port_group *pg;
+	struct hlist_node *n;
+
+	spin_lock(&br->multicast_lock);
+	hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
+		br_multicast_del_pg(br, pg);
+
+	if (!hlist_unhashed(&port->rlist))
+		hlist_del_init_rcu(&port->rlist);
+	del_timer(&port->multicast_router_timer);
+	del_timer(&port->ip4_own_query.timer);
+#if IS_ENABLED(CONFIG_IPV6)
+	del_timer(&port->ip6_own_query.timer);
+#endif
+	spin_unlock(&br->multicast_lock);
+}
+
+static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
+					 struct net_bridge_port *port,
+					 struct sk_buff *skb,
+					 u16 vid)
+{
+	struct igmpv3_report *ih;
+	struct igmpv3_grec *grec;
+	int i;
+	int len;
+	int num;
+	int type;
+	int err = 0;
+	__be32 group;
+
+	if (!pskb_may_pull(skb, sizeof(*ih)))
+		return -EINVAL;
+
+	ih = igmpv3_report_hdr(skb);
+	num = ntohs(ih->ngrec);
+	len = sizeof(*ih);
+
+	for (i = 0; i < num; i++) {
+		len += sizeof(*grec);
+		if (!pskb_may_pull(skb, len))
+			return -EINVAL;
+
+		grec = (void *)(skb->data + len - sizeof(*grec));
+		group = grec->grec_mca;
+		type = grec->grec_type;
+
+		len += ntohs(grec->grec_nsrcs) * 4;
+		if (!pskb_may_pull(skb, len))
+			return -EINVAL;
+
+		/* We treat this as an IGMPv2 report for now. */
+		switch (type) {
+		case IGMPV3_MODE_IS_INCLUDE:
+		case IGMPV3_MODE_IS_EXCLUDE:
+		case IGMPV3_CHANGE_TO_INCLUDE:
+		case IGMPV3_CHANGE_TO_EXCLUDE:
+		case IGMPV3_ALLOW_NEW_SOURCES:
+		case IGMPV3_BLOCK_OLD_SOURCES:
+			break;
+
+		default:
+			continue;
+		}
+
+		err = br_ip4_multicast_add_group(br, port, group, vid);
+		if (err)
+			break;
+	}
+
+	return err;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int br_ip6_multicast_mld2_report(struct net_bridge *br,
+					struct net_bridge_port *port,
+					struct sk_buff *skb,
+					u16 vid)
+{
+	struct icmp6hdr *icmp6h;
+	struct mld2_grec *grec;
+	int i;
+	int len;
+	int num;
+	int err = 0;
+
+	if (!pskb_may_pull(skb, sizeof(*icmp6h)))
+		return -EINVAL;
+
+	icmp6h = icmp6_hdr(skb);
+	num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
+	len = sizeof(*icmp6h);
+
+	for (i = 0; i < num; i++) {
+		__be16 *nsrcs, _nsrcs;
+
+		nsrcs = skb_header_pointer(skb,
+					   len + offsetof(struct mld2_grec,
+							  grec_nsrcs),
+					   sizeof(_nsrcs), &_nsrcs);
+		if (!nsrcs)
+			return -EINVAL;
+
+		if (!pskb_may_pull(skb,
+				   len + sizeof(*grec) +
+				   sizeof(struct in6_addr) * ntohs(*nsrcs)))
+			return -EINVAL;
+
+		grec = (struct mld2_grec *)(skb->data + len);
+		len += sizeof(*grec) +
+		       sizeof(struct in6_addr) * ntohs(*nsrcs);
+
+		/* We treat these as MLDv1 reports for now. */
+		switch (grec->grec_type) {
+		case MLD2_MODE_IS_INCLUDE:
+		case MLD2_MODE_IS_EXCLUDE:
+		case MLD2_CHANGE_TO_INCLUDE:
+		case MLD2_CHANGE_TO_EXCLUDE:
+		case MLD2_ALLOW_NEW_SOURCES:
+		case MLD2_BLOCK_OLD_SOURCES:
+			break;
+
+		default:
+			continue;
+		}
+
+		err = br_ip6_multicast_add_group(br, port, &grec->grec_mca,
+						 vid);
+		if (err)
+			break;
+	}
+
+	return err;
+}
+#endif
+
+static bool br_ip4_multicast_select_querier(struct net_bridge *br,
+					    struct net_bridge_port *port,
+					    __be32 saddr)
+{
+	if (!timer_pending(&br->ip4_own_query.timer) &&
+	    !timer_pending(&br->ip4_other_query.timer))
+		goto update;
+
+	if (!br->ip4_querier.addr.u.ip4)
+		goto update;
+
+	if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4))
+		goto update;
+
+	return false;
+
+update:
+	br->ip4_querier.addr.u.ip4 = saddr;
+
+	/* update protected by general multicast_lock by caller */
+	rcu_assign_pointer(br->ip4_querier.port, port);
+
+	return true;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static bool br_ip6_multicast_select_querier(struct net_bridge *br,
+					    struct net_bridge_port *port,
+					    struct in6_addr *saddr)
+{
+	if (!timer_pending(&br->ip6_own_query.timer) &&
+	    !timer_pending(&br->ip6_other_query.timer))
+		goto update;
+
+	if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0)
+		goto update;
+
+	return false;
+
+update:
+	br->ip6_querier.addr.u.ip6 = *saddr;
+
+	/* update protected by general multicast_lock by caller */
+	rcu_assign_pointer(br->ip6_querier.port, port);
+
+	return true;
+}
+#endif
+
+static bool br_multicast_select_querier(struct net_bridge *br,
+					struct net_bridge_port *port,
+					struct br_ip *saddr)
+{
+	switch (saddr->proto) {
+	case htons(ETH_P_IP):
+		return br_ip4_multicast_select_querier(br, port, saddr->u.ip4);
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6);
+#endif
+	}
+
+	return false;
+}
+
+static void
+br_multicast_update_query_timer(struct net_bridge *br,
+				struct bridge_mcast_other_query *query,
+				unsigned long max_delay)
+{
+	if (!timer_pending(&query->timer))
+		query->delay_time = jiffies + max_delay;
+
+	mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
+}
+
+/*
+ * Add port to router_list
+ *  list is maintained ordered by pointer value
+ *  and locked by br->multicast_lock and RCU
+ */
+static void br_multicast_add_router(struct net_bridge *br,
+				    struct net_bridge_port *port)
+{
+	struct net_bridge_port *p;
+	struct hlist_node *slot = NULL;
+
+	if (!hlist_unhashed(&port->rlist))
+		return;
+
+	hlist_for_each_entry(p, &br->router_list, rlist) {
+		if ((unsigned long) port >= (unsigned long) p)
+			break;
+		slot = &p->rlist;
+	}
+
+	if (slot)
+		hlist_add_behind_rcu(&port->rlist, slot);
+	else
+		hlist_add_head_rcu(&port->rlist, &br->router_list);
+}
+
+static void br_multicast_mark_router(struct net_bridge *br,
+				     struct net_bridge_port *port)
+{
+	unsigned long now = jiffies;
+
+	if (!port) {
+		if (br->multicast_router == 1)
+			mod_timer(&br->multicast_router_timer,
+				  now + br->multicast_querier_interval);
+		return;
+	}
+
+	if (port->multicast_router != 1)
+		return;
+
+	br_multicast_add_router(br, port);
+
+	mod_timer(&port->multicast_router_timer,
+		  now + br->multicast_querier_interval);
+}
+
+static void br_multicast_query_received(struct net_bridge *br,
+					struct net_bridge_port *port,
+					struct bridge_mcast_other_query *query,
+					struct br_ip *saddr,
+					unsigned long max_delay)
+{
+	if (!br_multicast_select_querier(br, port, saddr))
+		return;
+
+	br_multicast_update_query_timer(br, query, max_delay);
+	br_multicast_mark_router(br, port);
+}
+
+static int br_ip4_multicast_query(struct net_bridge *br,
+				  struct net_bridge_port *port,
+				  struct sk_buff *skb,
+				  u16 vid)
+{
+	const struct iphdr *iph = ip_hdr(skb);
+	struct igmphdr *ih = igmp_hdr(skb);
+	struct net_bridge_mdb_entry *mp;
+	struct igmpv3_query *ih3;
+	struct net_bridge_port_group *p;
+	struct net_bridge_port_group __rcu **pp;
+	struct br_ip saddr;
+	unsigned long max_delay;
+	unsigned long now = jiffies;
+	__be32 group;
+	int err = 0;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) ||
+	    (port && port->state == BR_STATE_DISABLED))
+		goto out;
+
+	group = ih->group;
+
+	if (skb->len == sizeof(*ih)) {
+		max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
+
+		if (!max_delay) {
+			max_delay = 10 * HZ;
+			group = 0;
+		}
+	} else {
+		if (!pskb_may_pull(skb, sizeof(struct igmpv3_query))) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		ih3 = igmpv3_query_hdr(skb);
+		if (ih3->nsrcs)
+			goto out;
+
+		max_delay = ih3->code ?
+			    IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
+	}
+
+	/* RFC2236+RFC3376 (IGMPv2+IGMPv3) require the multicast link layer
+	 * all-systems destination addresses (224.0.0.1) for general queries
+	 */
+	if (!group && iph->daddr != htonl(INADDR_ALLHOSTS_GROUP)) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	if (!group) {
+		saddr.proto = htons(ETH_P_IP);
+		saddr.u.ip4 = iph->saddr;
+
+		br_multicast_query_received(br, port, &br->ip4_other_query,
+					    &saddr, max_delay);
+		goto out;
+	}
+
+	mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group, vid);
+	if (!mp)
+		goto out;
+
+	max_delay *= br->multicast_last_member_count;
+
+	if (mp->mglist &&
+	    (timer_pending(&mp->timer) ?
+	     time_after(mp->timer.expires, now + max_delay) :
+	     try_to_del_timer_sync(&mp->timer) >= 0))
+		mod_timer(&mp->timer, now + max_delay);
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, br)) != NULL;
+	     pp = &p->next) {
+		if (timer_pending(&p->timer) ?
+		    time_after(p->timer.expires, now + max_delay) :
+		    try_to_del_timer_sync(&p->timer) >= 0)
+			mod_timer(&p->timer, now + max_delay);
+	}
+
+out:
+	spin_unlock(&br->multicast_lock);
+	return err;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int br_ip6_multicast_query(struct net_bridge *br,
+				  struct net_bridge_port *port,
+				  struct sk_buff *skb,
+				  u16 vid)
+{
+	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+	struct mld_msg *mld;
+	struct net_bridge_mdb_entry *mp;
+	struct mld2_query *mld2q;
+	struct net_bridge_port_group *p;
+	struct net_bridge_port_group __rcu **pp;
+	struct br_ip saddr;
+	unsigned long max_delay;
+	unsigned long now = jiffies;
+	const struct in6_addr *group = NULL;
+	bool is_general_query;
+	int err = 0;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) ||
+	    (port && port->state == BR_STATE_DISABLED))
+		goto out;
+
+	/* RFC2710+RFC3810 (MLDv1+MLDv2) require link-local source addresses */
+	if (!(ipv6_addr_type(&ip6h->saddr) & IPV6_ADDR_LINKLOCAL)) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	if (skb->len == sizeof(*mld)) {
+		if (!pskb_may_pull(skb, sizeof(*mld))) {
+			err = -EINVAL;
+			goto out;
+		}
+		mld = (struct mld_msg *) icmp6_hdr(skb);
+		max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
+		if (max_delay)
+			group = &mld->mld_mca;
+	} else {
+		if (!pskb_may_pull(skb, sizeof(*mld2q))) {
+			err = -EINVAL;
+			goto out;
+		}
+		mld2q = (struct mld2_query *)icmp6_hdr(skb);
+		if (!mld2q->mld2q_nsrcs)
+			group = &mld2q->mld2q_mca;
+
+		max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
+	}
+
+	is_general_query = group && ipv6_addr_any(group);
+
+	/* RFC2710+RFC3810 (MLDv1+MLDv2) require the multicast link layer
+	 * all-nodes destination address (ff02::1) for general queries
+	 */
+	if (is_general_query && !ipv6_addr_is_ll_all_nodes(&ip6h->daddr)) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	if (is_general_query) {
+		saddr.proto = htons(ETH_P_IPV6);
+		saddr.u.ip6 = ip6h->saddr;
+
+		br_multicast_query_received(br, port, &br->ip6_other_query,
+					    &saddr, max_delay);
+		goto out;
+	} else if (!group) {
+		goto out;
+	}
+
+	mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group, vid);
+	if (!mp)
+		goto out;
+
+	max_delay *= br->multicast_last_member_count;
+	if (mp->mglist &&
+	    (timer_pending(&mp->timer) ?
+	     time_after(mp->timer.expires, now + max_delay) :
+	     try_to_del_timer_sync(&mp->timer) >= 0))
+		mod_timer(&mp->timer, now + max_delay);
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, br)) != NULL;
+	     pp = &p->next) {
+		if (timer_pending(&p->timer) ?
+		    time_after(p->timer.expires, now + max_delay) :
+		    try_to_del_timer_sync(&p->timer) >= 0)
+			mod_timer(&p->timer, now + max_delay);
+	}
+
+out:
+	spin_unlock(&br->multicast_lock);
+	return err;
+}
+#endif
+
+static void
+br_multicast_leave_group(struct net_bridge *br,
+			 struct net_bridge_port *port,
+			 struct br_ip *group,
+			 struct bridge_mcast_other_query *other_query,
+			 struct bridge_mcast_own_query *own_query)
+{
+	struct net_bridge_mdb_htable *mdb;
+	struct net_bridge_mdb_entry *mp;
+	struct net_bridge_port_group *p;
+	unsigned long now;
+	unsigned long time;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) ||
+	    (port && port->state == BR_STATE_DISABLED) ||
+	    timer_pending(&other_query->timer))
+		goto out;
+
+	mdb = mlock_dereference(br->mdb, br);
+	mp = br_mdb_ip_get(mdb, group);
+	if (!mp)
+		goto out;
+
+	if (br->multicast_querier) {
+		__br_multicast_send_query(br, port, &mp->addr);
+
+		time = jiffies + br->multicast_last_member_count *
+				 br->multicast_last_member_interval;
+
+		mod_timer(&own_query->timer, time);
+
+		for (p = mlock_dereference(mp->ports, br);
+		     p != NULL;
+		     p = mlock_dereference(p->next, br)) {
+			if (p->port != port)
+				continue;
+
+			if (!hlist_unhashed(&p->mglist) &&
+			    (timer_pending(&p->timer) ?
+			     time_after(p->timer.expires, time) :
+			     try_to_del_timer_sync(&p->timer) >= 0)) {
+				mod_timer(&p->timer, time);
+			}
+
+			break;
+		}
+	}
+
+	if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
+		struct net_bridge_port_group __rcu **pp;
+
+		for (pp = &mp->ports;
+		     (p = mlock_dereference(*pp, br)) != NULL;
+		     pp = &p->next) {
+			if (p->port != port)
+				continue;
+
+			rcu_assign_pointer(*pp, p->next);
+			hlist_del_init(&p->mglist);
+			del_timer(&p->timer);
+			call_rcu_bh(&p->rcu, br_multicast_free_pg);
+			br_mdb_notify(br->dev, port, group, RTM_DELMDB);
+
+			if (!mp->ports && !mp->mglist &&
+			    netif_running(br->dev))
+				mod_timer(&mp->timer, jiffies);
+		}
+		goto out;
+	}
+
+	now = jiffies;
+	time = now + br->multicast_last_member_count *
+		     br->multicast_last_member_interval;
+
+	if (!port) {
+		if (mp->mglist &&
+		    (timer_pending(&mp->timer) ?
+		     time_after(mp->timer.expires, time) :
+		     try_to_del_timer_sync(&mp->timer) >= 0)) {
+			mod_timer(&mp->timer, time);
+		}
+
+		goto out;
+	}
+
+	for (p = mlock_dereference(mp->ports, br);
+	     p != NULL;
+	     p = mlock_dereference(p->next, br)) {
+		if (p->port != port)
+			continue;
+
+		if (!hlist_unhashed(&p->mglist) &&
+		    (timer_pending(&p->timer) ?
+		     time_after(p->timer.expires, time) :
+		     try_to_del_timer_sync(&p->timer) >= 0)) {
+			mod_timer(&p->timer, time);
+		}
+
+		break;
+	}
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_ip4_multicast_leave_group(struct net_bridge *br,
+					 struct net_bridge_port *port,
+					 __be32 group,
+					 __u16 vid)
+{
+	struct br_ip br_group;
+	struct bridge_mcast_own_query *own_query;
+
+	if (ipv4_is_local_multicast(group))
+		return;
+
+	own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
+
+	br_group.u.ip4 = group;
+	br_group.proto = htons(ETH_P_IP);
+	br_group.vid = vid;
+
+	br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
+				 own_query);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_leave_group(struct net_bridge *br,
+					 struct net_bridge_port *port,
+					 const struct in6_addr *group,
+					 __u16 vid)
+{
+	struct br_ip br_group;
+	struct bridge_mcast_own_query *own_query;
+
+	if (ipv6_addr_is_ll_all_nodes(group))
+		return;
+
+	own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
+
+	br_group.u.ip6 = *group;
+	br_group.proto = htons(ETH_P_IPV6);
+	br_group.vid = vid;
+
+	br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
+				 own_query);
+}
+#endif
+
+static int br_multicast_ipv4_rcv(struct net_bridge *br,
+				 struct net_bridge_port *port,
+				 struct sk_buff *skb,
+				 u16 vid)
+{
+	struct sk_buff *skb2 = skb;
+	const struct iphdr *iph;
+	struct igmphdr *ih;
+	unsigned int len;
+	unsigned int offset;
+	int err;
+
+	/* We treat OOM as packet loss for now. */
+	if (!pskb_may_pull(skb, sizeof(*iph)))
+		return -EINVAL;
+
+	iph = ip_hdr(skb);
+
+	if (iph->ihl < 5 || iph->version != 4)
+		return -EINVAL;
+
+	if (!pskb_may_pull(skb, ip_hdrlen(skb)))
+		return -EINVAL;
+
+	iph = ip_hdr(skb);
+
+	if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
+		return -EINVAL;
+
+	if (iph->protocol != IPPROTO_IGMP) {
+		if (!ipv4_is_local_multicast(iph->daddr))
+			BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
+		return 0;
+	}
+
+	len = ntohs(iph->tot_len);
+	if (skb->len < len || len < ip_hdrlen(skb))
+		return -EINVAL;
+
+	if (skb->len > len) {
+		skb2 = skb_clone(skb, GFP_ATOMIC);
+		if (!skb2)
+			return -ENOMEM;
+
+		err = pskb_trim_rcsum(skb2, len);
+		if (err)
+			goto err_out;
+	}
+
+	len -= ip_hdrlen(skb2);
+	offset = skb_network_offset(skb2) + ip_hdrlen(skb2);
+	__skb_pull(skb2, offset);
+	skb_reset_transport_header(skb2);
+
+	err = -EINVAL;
+	if (!pskb_may_pull(skb2, sizeof(*ih)))
+		goto out;
+
+	switch (skb2->ip_summed) {
+	case CHECKSUM_COMPLETE:
+		if (!csum_fold(skb2->csum))
+			break;
+		/* fall through */
+	case CHECKSUM_NONE:
+		skb2->csum = 0;
+		if (skb_checksum_complete(skb2))
+			goto out;
+	}
+
+	err = 0;
+
+	BR_INPUT_SKB_CB(skb)->igmp = 1;
+	ih = igmp_hdr(skb2);
+
+	switch (ih->type) {
+	case IGMP_HOST_MEMBERSHIP_REPORT:
+	case IGMPV2_HOST_MEMBERSHIP_REPORT:
+		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
+		err = br_ip4_multicast_add_group(br, port, ih->group, vid);
+		break;
+	case IGMPV3_HOST_MEMBERSHIP_REPORT:
+		err = br_ip4_multicast_igmp3_report(br, port, skb2, vid);
+		break;
+	case IGMP_HOST_MEMBERSHIP_QUERY:
+		err = br_ip4_multicast_query(br, port, skb2, vid);
+		break;
+	case IGMP_HOST_LEAVE_MESSAGE:
+		br_ip4_multicast_leave_group(br, port, ih->group, vid);
+		break;
+	}
+
+out:
+	__skb_push(skb2, offset);
+err_out:
+	if (skb2 != skb)
+		kfree_skb(skb2);
+	return err;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int br_multicast_ipv6_rcv(struct net_bridge *br,
+				 struct net_bridge_port *port,
+				 struct sk_buff *skb,
+				 u16 vid)
+{
+	struct sk_buff *skb2;
+	const struct ipv6hdr *ip6h;
+	u8 icmp6_type;
+	u8 nexthdr;
+	__be16 frag_off;
+	unsigned int len;
+	int offset;
+	int err;
+
+	if (!pskb_may_pull(skb, sizeof(*ip6h)))
+		return -EINVAL;
+
+	ip6h = ipv6_hdr(skb);
+
+	/*
+	 * We're interested in MLD messages only.
+	 *  - Version is 6
+	 *  - MLD has always Router Alert hop-by-hop option
+	 *  - But we do not support jumbrograms.
+	 */
+	if (ip6h->version != 6)
+		return 0;
+
+	/* Prevent flooding this packet if there is no listener present */
+	if (!ipv6_addr_is_ll_all_nodes(&ip6h->daddr))
+		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
+
+	if (ip6h->nexthdr != IPPROTO_HOPOPTS ||
+	    ip6h->payload_len == 0)
+		return 0;
+
+	len = ntohs(ip6h->payload_len) + sizeof(*ip6h);
+	if (skb->len < len)
+		return -EINVAL;
+
+	nexthdr = ip6h->nexthdr;
+	offset = ipv6_skip_exthdr(skb, sizeof(*ip6h), &nexthdr, &frag_off);
+
+	if (offset < 0 || nexthdr != IPPROTO_ICMPV6)
+		return 0;
+
+	/* Okay, we found ICMPv6 header */
+	skb2 = skb_clone(skb, GFP_ATOMIC);
+	if (!skb2)
+		return -ENOMEM;
+
+	err = -EINVAL;
+	if (!pskb_may_pull(skb2, offset + sizeof(struct icmp6hdr)))
+		goto out;
+
+	len -= offset - skb_network_offset(skb2);
+
+	__skb_pull(skb2, offset);
+	skb_reset_transport_header(skb2);
+	skb_postpull_rcsum(skb2, skb_network_header(skb2),
+			   skb_network_header_len(skb2));
+
+	icmp6_type = icmp6_hdr(skb2)->icmp6_type;
+
+	switch (icmp6_type) {
+	case ICMPV6_MGM_QUERY:
+	case ICMPV6_MGM_REPORT:
+	case ICMPV6_MGM_REDUCTION:
+	case ICMPV6_MLD2_REPORT:
+		break;
+	default:
+		err = 0;
+		goto out;
+	}
+
+	/* Okay, we found MLD message. Check further. */
+	if (skb2->len > len) {
+		err = pskb_trim_rcsum(skb2, len);
+		if (err)
+			goto out;
+		err = -EINVAL;
+	}
+
+	ip6h = ipv6_hdr(skb2);
+
+	switch (skb2->ip_summed) {
+	case CHECKSUM_COMPLETE:
+		if (!csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, skb2->len,
+					IPPROTO_ICMPV6, skb2->csum))
+			break;
+		/*FALLTHROUGH*/
+	case CHECKSUM_NONE:
+		skb2->csum = ~csum_unfold(csum_ipv6_magic(&ip6h->saddr,
+							&ip6h->daddr,
+							skb2->len,
+							IPPROTO_ICMPV6, 0));
+		if (__skb_checksum_complete(skb2))
+			goto out;
+	}
+
+	err = 0;
+
+	BR_INPUT_SKB_CB(skb)->igmp = 1;
+
+	switch (icmp6_type) {
+	case ICMPV6_MGM_REPORT:
+	    {
+		struct mld_msg *mld;
+		if (!pskb_may_pull(skb2, sizeof(*mld))) {
+			err = -EINVAL;
+			goto out;
+		}
+		mld = (struct mld_msg *)skb_transport_header(skb2);
+		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
+		err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid);
+		break;
+	    }
+	case ICMPV6_MLD2_REPORT:
+		err = br_ip6_multicast_mld2_report(br, port, skb2, vid);
+		break;
+	case ICMPV6_MGM_QUERY:
+		err = br_ip6_multicast_query(br, port, skb2, vid);
+		break;
+	case ICMPV6_MGM_REDUCTION:
+	    {
+		struct mld_msg *mld;
+		if (!pskb_may_pull(skb2, sizeof(*mld))) {
+			err = -EINVAL;
+			goto out;
+		}
+		mld = (struct mld_msg *)skb_transport_header(skb2);
+		br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid);
+	    }
+	}
+
+out:
+	kfree_skb(skb2);
+	return err;
+}
+#endif
+
+int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
+		     struct sk_buff *skb, u16 vid)
+{
+	BR_INPUT_SKB_CB(skb)->igmp = 0;
+	BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
+
+	if (br->multicast_disabled)
+		return 0;
+
+	switch (skb->protocol) {
+	case htons(ETH_P_IP):
+		return br_multicast_ipv4_rcv(br, port, skb, vid);
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		return br_multicast_ipv6_rcv(br, port, skb, vid);
+#endif
+	}
+
+	return 0;
+}
+
+static void br_multicast_query_expired(struct net_bridge *br,
+				       struct bridge_mcast_own_query *query,
+				       struct bridge_mcast_querier *querier)
+{
+	spin_lock(&br->multicast_lock);
+	if (query->startup_sent < br->multicast_startup_query_count)
+		query->startup_sent++;
+
+	RCU_INIT_POINTER(querier->port, NULL);
+	br_multicast_send_query(br, NULL, query);
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_ip4_multicast_query_expired(unsigned long data)
+{
+	struct net_bridge *br = (void *)data;
+
+	br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_query_expired(unsigned long data)
+{
+	struct net_bridge *br = (void *)data;
+
+	br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
+}
+#endif
+
+void br_multicast_init(struct net_bridge *br)
+{
+	br->hash_elasticity = 4;
+	br->hash_max = 512;
+
+	br->multicast_router = 1;
+	br->multicast_querier = 0;
+	br->multicast_query_use_ifaddr = 0;
+	br->multicast_last_member_count = 2;
+	br->multicast_startup_query_count = 2;
+
+	br->multicast_last_member_interval = HZ;
+	br->multicast_query_response_interval = 10 * HZ;
+	br->multicast_startup_query_interval = 125 * HZ / 4;
+	br->multicast_query_interval = 125 * HZ;
+	br->multicast_querier_interval = 255 * HZ;
+	br->multicast_membership_interval = 260 * HZ;
+
+	br->ip4_other_query.delay_time = 0;
+	br->ip4_querier.port = NULL;
+#if IS_ENABLED(CONFIG_IPV6)
+	br->ip6_other_query.delay_time = 0;
+	br->ip6_querier.port = NULL;
+#endif
+
+	spin_lock_init(&br->multicast_lock);
+	setup_timer(&br->multicast_router_timer,
+		    br_multicast_local_router_expired, 0);
+	setup_timer(&br->ip4_other_query.timer,
+		    br_ip4_multicast_querier_expired, (unsigned long)br);
+	setup_timer(&br->ip4_own_query.timer, br_ip4_multicast_query_expired,
+		    (unsigned long)br);
+#if IS_ENABLED(CONFIG_IPV6)
+	setup_timer(&br->ip6_other_query.timer,
+		    br_ip6_multicast_querier_expired, (unsigned long)br);
+	setup_timer(&br->ip6_own_query.timer, br_ip6_multicast_query_expired,
+		    (unsigned long)br);
+#endif
+}
+
+static void __br_multicast_open(struct net_bridge *br,
+				struct bridge_mcast_own_query *query)
+{
+	query->startup_sent = 0;
+
+	if (br->multicast_disabled)
+		return;
+
+	mod_timer(&query->timer, jiffies);
+}
+
+void br_multicast_open(struct net_bridge *br)
+{
+	__br_multicast_open(br, &br->ip4_own_query);
+#if IS_ENABLED(CONFIG_IPV6)
+	__br_multicast_open(br, &br->ip6_own_query);
+#endif
+}
+
+void br_multicast_stop(struct net_bridge *br)
+{
+	struct net_bridge_mdb_htable *mdb;
+	struct net_bridge_mdb_entry *mp;
+	struct hlist_node *n;
+	u32 ver;
+	int i;
+
+	del_timer_sync(&br->multicast_router_timer);
+	del_timer_sync(&br->ip4_other_query.timer);
+	del_timer_sync(&br->ip4_own_query.timer);
+#if IS_ENABLED(CONFIG_IPV6)
+	del_timer_sync(&br->ip6_other_query.timer);
+	del_timer_sync(&br->ip6_own_query.timer);
+#endif
+
+	spin_lock_bh(&br->multicast_lock);
+	mdb = mlock_dereference(br->mdb, br);
+	if (!mdb)
+		goto out;
+
+	br->mdb = NULL;
+
+	ver = mdb->ver;
+	for (i = 0; i < mdb->max; i++) {
+		hlist_for_each_entry_safe(mp, n, &mdb->mhash[i],
+					  hlist[ver]) {
+			del_timer(&mp->timer);
+			call_rcu_bh(&mp->rcu, br_multicast_free_group);
+		}
+	}
+
+	if (mdb->old) {
+		spin_unlock_bh(&br->multicast_lock);
+		rcu_barrier_bh();
+		spin_lock_bh(&br->multicast_lock);
+		WARN_ON(mdb->old);
+	}
+
+	mdb->old = mdb;
+	call_rcu_bh(&mdb->rcu, br_mdb_free);
+
+out:
+	spin_unlock_bh(&br->multicast_lock);
+}
+
+int br_multicast_set_router(struct net_bridge *br, unsigned long val)
+{
+	int err = -ENOENT;
+
+	spin_lock_bh(&br->multicast_lock);
+	if (!netif_running(br->dev))
+		goto unlock;
+
+	switch (val) {
+	case 0:
+	case 2:
+		del_timer(&br->multicast_router_timer);
+		/* fall through */
+	case 1:
+		br->multicast_router = val;
+		err = 0;
+		break;
+
+	default:
+		err = -EINVAL;
+		break;
+	}
+
+unlock:
+	spin_unlock_bh(&br->multicast_lock);
+
+	return err;
+}
+
+int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
+{
+	struct net_bridge *br = p->br;
+	int err = -ENOENT;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) || p->state == BR_STATE_DISABLED)
+		goto unlock;
+
+	switch (val) {
+	case 0:
+	case 1:
+	case 2:
+		p->multicast_router = val;
+		err = 0;
+
+		if (val < 2 && !hlist_unhashed(&p->rlist))
+			hlist_del_init_rcu(&p->rlist);
+
+		if (val == 1)
+			break;
+
+		del_timer(&p->multicast_router_timer);
+
+		if (val == 0)
+			break;
+
+		br_multicast_add_router(br, p);
+		break;
+
+	default:
+		err = -EINVAL;
+		break;
+	}
+
+unlock:
+	spin_unlock(&br->multicast_lock);
+
+	return err;
+}
+
+static void br_multicast_start_querier(struct net_bridge *br,
+				       struct bridge_mcast_own_query *query)
+{
+	struct net_bridge_port *port;
+
+	__br_multicast_open(br, query);
+
+	list_for_each_entry(port, &br->port_list, list) {
+		if (port->state == BR_STATE_DISABLED ||
+		    port->state == BR_STATE_BLOCKING)
+			continue;
+
+		if (query == &br->ip4_own_query)
+			br_multicast_enable(&port->ip4_own_query);
+#if IS_ENABLED(CONFIG_IPV6)
+		else
+			br_multicast_enable(&port->ip6_own_query);
+#endif
+	}
+}
+
+int br_multicast_toggle(struct net_bridge *br, unsigned long val)
+{
+	int err = 0;
+	struct net_bridge_mdb_htable *mdb;
+
+	spin_lock_bh(&br->multicast_lock);
+	if (br->multicast_disabled == !val)
+		goto unlock;
+
+	br->multicast_disabled = !val;
+	if (br->multicast_disabled)
+		goto unlock;
+
+	if (!netif_running(br->dev))
+		goto unlock;
+
+	mdb = mlock_dereference(br->mdb, br);
+	if (mdb) {
+		if (mdb->old) {
+			err = -EEXIST;
+rollback:
+			br->multicast_disabled = !!val;
+			goto unlock;
+		}
+
+		err = br_mdb_rehash(&br->mdb, mdb->max,
+				    br->hash_elasticity);
+		if (err)
+			goto rollback;
+	}
+
+	br_multicast_start_querier(br, &br->ip4_own_query);
+#if IS_ENABLED(CONFIG_IPV6)
+	br_multicast_start_querier(br, &br->ip6_own_query);
+#endif
+
+unlock:
+	spin_unlock_bh(&br->multicast_lock);
+
+	return err;
+}
+
+int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
+{
+	unsigned long max_delay;
+
+	val = !!val;
+
+	spin_lock_bh(&br->multicast_lock);
+	if (br->multicast_querier == val)
+		goto unlock;
+
+	br->multicast_querier = val;
+	if (!val)
+		goto unlock;
+
+	max_delay = br->multicast_query_response_interval;
+
+	if (!timer_pending(&br->ip4_other_query.timer))
+		br->ip4_other_query.delay_time = jiffies + max_delay;
+
+	br_multicast_start_querier(br, &br->ip4_own_query);
+
+#if IS_ENABLED(CONFIG_IPV6)
+	if (!timer_pending(&br->ip6_other_query.timer))
+		br->ip6_other_query.delay_time = jiffies + max_delay;
+
+	br_multicast_start_querier(br, &br->ip6_own_query);
+#endif
+
+unlock:
+	spin_unlock_bh(&br->multicast_lock);
+
+	return 0;
+}
+
+int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val)
+{
+	int err = -ENOENT;
+	u32 old;
+	struct net_bridge_mdb_htable *mdb;
+
+	spin_lock_bh(&br->multicast_lock);
+	if (!netif_running(br->dev))
+		goto unlock;
+
+	err = -EINVAL;
+	if (!is_power_of_2(val))
+		goto unlock;
+
+	mdb = mlock_dereference(br->mdb, br);
+	if (mdb && val < mdb->size)
+		goto unlock;
+
+	err = 0;
+
+	old = br->hash_max;
+	br->hash_max = val;
+
+	if (mdb) {
+		if (mdb->old) {
+			err = -EEXIST;
+rollback:
+			br->hash_max = old;
+			goto unlock;
+		}
+
+		err = br_mdb_rehash(&br->mdb, br->hash_max,
+				    br->hash_elasticity);
+		if (err)
+			goto rollback;
+	}
+
+unlock:
+	spin_unlock_bh(&br->multicast_lock);
+
+	return err;
+}
+
+/**
+ * br_multicast_list_adjacent - Returns snooped multicast addresses
+ * @dev:	The bridge port adjacent to which to retrieve addresses
+ * @br_ip_list:	The list to store found, snooped multicast IP addresses in
+ *
+ * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
+ * snooping feature on all bridge ports of dev's bridge device, excluding
+ * the addresses from dev itself.
+ *
+ * Returns the number of items added to br_ip_list.
+ *
+ * Notes:
+ * - br_ip_list needs to be initialized by caller
+ * - br_ip_list might contain duplicates in the end
+ *   (needs to be taken care of by caller)
+ * - br_ip_list needs to be freed by caller
+ */
+int br_multicast_list_adjacent(struct net_device *dev,
+			       struct list_head *br_ip_list)
+{
+	struct net_bridge *br;
+	struct net_bridge_port *port;
+	struct net_bridge_port_group *group;
+	struct br_ip_list *entry;
+	int count = 0;
+
+	rcu_read_lock();
+	if (!br_ip_list || !br_port_exists(dev))
+		goto unlock;
+
+	port = br_port_get_rcu(dev);
+	if (!port || !port->br)
+		goto unlock;
+
+	br = port->br;
+
+	list_for_each_entry_rcu(port, &br->port_list, list) {
+		if (!port->dev || port->dev == dev)
+			continue;
+
+		hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
+			entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
+			if (!entry)
+				goto unlock;
+
+			entry->addr = group->addr;
+			list_add(&entry->list, br_ip_list);
+			count++;
+		}
+	}
+
+unlock:
+	rcu_read_unlock();
+	return count;
+}
+EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
+
+/**
+ * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
+ * @dev: The bridge port providing the bridge on which to check for a querier
+ * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
+ *
+ * Checks whether the given interface has a bridge on top and if so returns
+ * true if a valid querier exists anywhere on the bridged link layer.
+ * Otherwise returns false.
+ */
+bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
+{
+	struct net_bridge *br;
+	struct net_bridge_port *port;
+	struct ethhdr eth;
+	bool ret = false;
+
+	rcu_read_lock();
+	if (!br_port_exists(dev))
+		goto unlock;
+
+	port = br_port_get_rcu(dev);
+	if (!port || !port->br)
+		goto unlock;
+
+	br = port->br;
+
+	memset(&eth, 0, sizeof(eth));
+	eth.h_proto = htons(proto);
+
+	ret = br_multicast_querier_exists(br, &eth);
+
+unlock:
+	rcu_read_unlock();
+	return ret;
+}
+EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
+
+/**
+ * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
+ * @dev: The bridge port adjacent to which to check for a querier
+ * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
+ *
+ * Checks whether the given interface has a bridge on top and if so returns
+ * true if a selected querier is behind one of the other ports of this
+ * bridge. Otherwise returns false.
+ */
+bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
+{
+	struct net_bridge *br;
+	struct net_bridge_port *port;
+	bool ret = false;
+
+	rcu_read_lock();
+	if (!br_port_exists(dev))
+		goto unlock;
+
+	port = br_port_get_rcu(dev);
+	if (!port || !port->br)
+		goto unlock;
+
+	br = port->br;
+
+	switch (proto) {
+	case ETH_P_IP:
+		if (!timer_pending(&br->ip4_other_query.timer) ||
+		    rcu_dereference(br->ip4_querier.port) == port)
+			goto unlock;
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case ETH_P_IPV6:
+		if (!timer_pending(&br->ip6_other_query.timer) ||
+		    rcu_dereference(br->ip6_querier.port) == port)
+			goto unlock;
+		break;
+#endif
+	default:
+		goto unlock;
+	}
+
+	ret = true;
+unlock:
+	rcu_read_unlock();
+	return ret;
+}
+EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
diff --git a/kernel/net/bridge/br_netfilter.c b/kernel/net/bridge/br_netfilter.c
new file mode 100644
index 000000000..60ddfbeb4
--- /dev/null
+++ b/kernel/net/bridge/br_netfilter.c
@@ -0,0 +1,1140 @@
+/*
+ *	Handle firewalling
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *	Bart De Schuymer		<bdschuym@pandora.be>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ *
+ *	Lennert dedicates this file to Kerstin Wurdinger.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/ip.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/if_pppox.h>
+#include <linux/ppp_defs.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter_arp.h>
+#include <linux/in_route.h>
+#include <linux/inetdevice.h>
+
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/route.h>
+#include <net/netfilter/br_netfilter.h>
+
+#include <asm/uaccess.h>
+#include "br_private.h"
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table_header *brnf_sysctl_header;
+static int brnf_call_iptables __read_mostly = 1;
+static int brnf_call_ip6tables __read_mostly = 1;
+static int brnf_call_arptables __read_mostly = 1;
+static int brnf_filter_vlan_tagged __read_mostly = 0;
+static int brnf_filter_pppoe_tagged __read_mostly = 0;
+static int brnf_pass_vlan_indev __read_mostly = 0;
+#else
+#define brnf_call_iptables 1
+#define brnf_call_ip6tables 1
+#define brnf_call_arptables 1
+#define brnf_filter_vlan_tagged 0
+#define brnf_filter_pppoe_tagged 0
+#define brnf_pass_vlan_indev 0
+#endif
+
+#define IS_IP(skb) \
+	(!skb_vlan_tag_present(skb) && skb->protocol == htons(ETH_P_IP))
+
+#define IS_IPV6(skb) \
+	(!skb_vlan_tag_present(skb) && skb->protocol == htons(ETH_P_IPV6))
+
+#define IS_ARP(skb) \
+	(!skb_vlan_tag_present(skb) && skb->protocol == htons(ETH_P_ARP))
+
+static inline __be16 vlan_proto(const struct sk_buff *skb)
+{
+	if (skb_vlan_tag_present(skb))
+		return skb->protocol;
+	else if (skb->protocol == htons(ETH_P_8021Q))
+		return vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
+	else
+		return 0;
+}
+
+#define IS_VLAN_IP(skb) \
+	(vlan_proto(skb) == htons(ETH_P_IP) && \
+	 brnf_filter_vlan_tagged)
+
+#define IS_VLAN_IPV6(skb) \
+	(vlan_proto(skb) == htons(ETH_P_IPV6) && \
+	 brnf_filter_vlan_tagged)
+
+#define IS_VLAN_ARP(skb) \
+	(vlan_proto(skb) == htons(ETH_P_ARP) &&	\
+	 brnf_filter_vlan_tagged)
+
+static inline __be16 pppoe_proto(const struct sk_buff *skb)
+{
+	return *((__be16 *)(skb_mac_header(skb) + ETH_HLEN +
+			    sizeof(struct pppoe_hdr)));
+}
+
+#define IS_PPPOE_IP(skb) \
+	(skb->protocol == htons(ETH_P_PPP_SES) && \
+	 pppoe_proto(skb) == htons(PPP_IP) && \
+	 brnf_filter_pppoe_tagged)
+
+#define IS_PPPOE_IPV6(skb) \
+	(skb->protocol == htons(ETH_P_PPP_SES) && \
+	 pppoe_proto(skb) == htons(PPP_IPV6) && \
+	 brnf_filter_pppoe_tagged)
+
+/* largest possible L2 header, see br_nf_dev_queue_xmit() */
+#define NF_BRIDGE_MAX_MAC_HEADER_LENGTH (PPPOE_SES_HLEN + ETH_HLEN)
+
+#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4)
+struct brnf_frag_data {
+	char mac[NF_BRIDGE_MAX_MAC_HEADER_LENGTH];
+	u8 encap_size;
+	u8 size;
+};
+
+static DEFINE_PER_CPU(struct brnf_frag_data, brnf_frag_data_storage);
+#endif
+
+static struct nf_bridge_info *nf_bridge_info_get(const struct sk_buff *skb)
+{
+	return skb->nf_bridge;
+}
+
+static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
+{
+	struct net_bridge_port *port;
+
+	port = br_port_get_rcu(dev);
+	return port ? &port->br->fake_rtable : NULL;
+}
+
+static inline struct net_device *bridge_parent(const struct net_device *dev)
+{
+	struct net_bridge_port *port;
+
+	port = br_port_get_rcu(dev);
+	return port ? port->br->dev : NULL;
+}
+
+static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
+{
+	skb->nf_bridge = kzalloc(sizeof(struct nf_bridge_info), GFP_ATOMIC);
+	if (likely(skb->nf_bridge))
+		atomic_set(&(skb->nf_bridge->use), 1);
+
+	return skb->nf_bridge;
+}
+
+static inline struct nf_bridge_info *nf_bridge_unshare(struct sk_buff *skb)
+{
+	struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+
+	if (atomic_read(&nf_bridge->use) > 1) {
+		struct nf_bridge_info *tmp = nf_bridge_alloc(skb);
+
+		if (tmp) {
+			memcpy(tmp, nf_bridge, sizeof(struct nf_bridge_info));
+			atomic_set(&tmp->use, 1);
+		}
+		nf_bridge_put(nf_bridge);
+		nf_bridge = tmp;
+	}
+	return nf_bridge;
+}
+
+static unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
+{
+	switch (skb->protocol) {
+	case __cpu_to_be16(ETH_P_8021Q):
+		return VLAN_HLEN;
+	case __cpu_to_be16(ETH_P_PPP_SES):
+		return PPPOE_SES_HLEN;
+	default:
+		return 0;
+	}
+}
+
+static inline void nf_bridge_push_encap_header(struct sk_buff *skb)
+{
+	unsigned int len = nf_bridge_encap_header_len(skb);
+
+	skb_push(skb, len);
+	skb->network_header -= len;
+}
+
+static inline void nf_bridge_pull_encap_header(struct sk_buff *skb)
+{
+	unsigned int len = nf_bridge_encap_header_len(skb);
+
+	skb_pull(skb, len);
+	skb->network_header += len;
+}
+
+static inline void nf_bridge_pull_encap_header_rcsum(struct sk_buff *skb)
+{
+	unsigned int len = nf_bridge_encap_header_len(skb);
+
+	skb_pull_rcsum(skb, len);
+	skb->network_header += len;
+}
+
+/* When handing a packet over to the IP layer
+ * check whether we have a skb that is in the
+ * expected format
+ */
+
+static int br_parse_ip_options(struct sk_buff *skb)
+{
+	const struct iphdr *iph;
+	struct net_device *dev = skb->dev;
+	u32 len;
+
+	if (!pskb_may_pull(skb, sizeof(struct iphdr)))
+		goto inhdr_error;
+
+	iph = ip_hdr(skb);
+
+	/* Basic sanity checks */
+	if (iph->ihl < 5 || iph->version != 4)
+		goto inhdr_error;
+
+	if (!pskb_may_pull(skb, iph->ihl*4))
+		goto inhdr_error;
+
+	iph = ip_hdr(skb);
+	if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
+		goto inhdr_error;
+
+	len = ntohs(iph->tot_len);
+	if (skb->len < len) {
+		IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_INTRUNCATEDPKTS);
+		goto drop;
+	} else if (len < (iph->ihl*4))
+		goto inhdr_error;
+
+	if (pskb_trim_rcsum(skb, len)) {
+		IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_INDISCARDS);
+		goto drop;
+	}
+
+	memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
+	/* We should really parse IP options here but until
+	 * somebody who actually uses IP options complains to
+	 * us we'll just silently ignore the options because
+	 * we're lazy!
+	 */
+	return 0;
+
+inhdr_error:
+	IP_INC_STATS_BH(dev_net(dev), IPSTATS_MIB_INHDRERRORS);
+drop:
+	return -1;
+}
+
+static void nf_bridge_update_protocol(struct sk_buff *skb)
+{
+	switch (skb->nf_bridge->orig_proto) {
+	case BRNF_PROTO_8021Q:
+		skb->protocol = htons(ETH_P_8021Q);
+		break;
+	case BRNF_PROTO_PPPOE:
+		skb->protocol = htons(ETH_P_PPP_SES);
+		break;
+	case BRNF_PROTO_UNCHANGED:
+		break;
+	}
+}
+
+/* PF_BRIDGE/PRE_ROUTING *********************************************/
+/* Undo the changes made for ip6tables PREROUTING and continue the
+ * bridge PRE_ROUTING hook. */
+static int br_nf_pre_routing_finish_ipv6(struct sock *sk, struct sk_buff *skb)
+{
+	struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+	struct rtable *rt;
+
+	if (nf_bridge->pkt_otherhost) {
+		skb->pkt_type = PACKET_OTHERHOST;
+		nf_bridge->pkt_otherhost = false;
+	}
+	nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
+
+	rt = bridge_parent_rtable(nf_bridge->physindev);
+	if (!rt) {
+		kfree_skb(skb);
+		return 0;
+	}
+	skb_dst_set_noref(skb, &rt->dst);
+
+	skb->dev = nf_bridge->physindev;
+	nf_bridge_update_protocol(skb);
+	nf_bridge_push_encap_header(skb);
+	NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, sk, skb,
+		       skb->dev, NULL,
+		       br_handle_frame_finish, 1);
+
+	return 0;
+}
+
+/* Obtain the correct destination MAC address, while preserving the original
+ * source MAC address. If we already know this address, we just copy it. If we
+ * don't, we use the neighbour framework to find out. In both cases, we make
+ * sure that br_handle_frame_finish() is called afterwards.
+ */
+static int br_nf_pre_routing_finish_bridge(struct sock *sk, struct sk_buff *skb)
+{
+	struct neighbour *neigh;
+	struct dst_entry *dst;
+
+	skb->dev = bridge_parent(skb->dev);
+	if (!skb->dev)
+		goto free_skb;
+	dst = skb_dst(skb);
+	neigh = dst_neigh_lookup_skb(dst, skb);
+	if (neigh) {
+		struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+		int ret;
+
+		if (neigh->hh.hh_len) {
+			neigh_hh_bridge(&neigh->hh, skb);
+			skb->dev = nf_bridge->physindev;
+			ret = br_handle_frame_finish(sk, skb);
+		} else {
+			/* the neighbour function below overwrites the complete
+			 * MAC header, so we save the Ethernet source address and
+			 * protocol number.
+			 */
+			skb_copy_from_linear_data_offset(skb,
+							 -(ETH_HLEN-ETH_ALEN),
+							 nf_bridge->neigh_header,
+							 ETH_HLEN-ETH_ALEN);
+			/* tell br_dev_xmit to continue with forwarding */
+			nf_bridge->mask |= BRNF_BRIDGED_DNAT;
+			/* FIXME Need to refragment */
+			ret = neigh->output(neigh, skb);
+		}
+		neigh_release(neigh);
+		return ret;
+	}
+free_skb:
+	kfree_skb(skb);
+	return 0;
+}
+
+static bool daddr_was_changed(const struct sk_buff *skb,
+			      const struct nf_bridge_info *nf_bridge)
+{
+	return ip_hdr(skb)->daddr != nf_bridge->ipv4_daddr;
+}
+
+/* This requires some explaining. If DNAT has taken place,
+ * we will need to fix up the destination Ethernet address.
+ * This is also true when SNAT takes place (for the reply direction).
+ *
+ * There are two cases to consider:
+ * 1. The packet was DNAT'ed to a device in the same bridge
+ *    port group as it was received on. We can still bridge
+ *    the packet.
+ * 2. The packet was DNAT'ed to a different device, either
+ *    a non-bridged device or another bridge port group.
+ *    The packet will need to be routed.
+ *
+ * The correct way of distinguishing between these two cases is to
+ * call ip_route_input() and to look at skb->dst->dev, which is
+ * changed to the destination device if ip_route_input() succeeds.
+ *
+ * Let's first consider the case that ip_route_input() succeeds:
+ *
+ * If the output device equals the logical bridge device the packet
+ * came in on, we can consider this bridging. The corresponding MAC
+ * address will be obtained in br_nf_pre_routing_finish_bridge.
+ * Otherwise, the packet is considered to be routed and we just
+ * change the destination MAC address so that the packet will
+ * later be passed up to the IP stack to be routed. For a redirected
+ * packet, ip_route_input() will give back the localhost as output device,
+ * which differs from the bridge device.
+ *
+ * Let's now consider the case that ip_route_input() fails:
+ *
+ * This can be because the destination address is martian, in which case
+ * the packet will be dropped.
+ * If IP forwarding is disabled, ip_route_input() will fail, while
+ * ip_route_output_key() can return success. The source
+ * address for ip_route_output_key() is set to zero, so ip_route_output_key()
+ * thinks we're handling a locally generated packet and won't care
+ * if IP forwarding is enabled. If the output device equals the logical bridge
+ * device, we proceed as if ip_route_input() succeeded. If it differs from the
+ * logical bridge port or if ip_route_output_key() fails we drop the packet.
+ */
+static int br_nf_pre_routing_finish(struct sock *sk, struct sk_buff *skb)
+{
+	struct net_device *dev = skb->dev;
+	struct iphdr *iph = ip_hdr(skb);
+	struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+	struct rtable *rt;
+	int err;
+	int frag_max_size;
+
+	frag_max_size = IPCB(skb)->frag_max_size;
+	BR_INPUT_SKB_CB(skb)->frag_max_size = frag_max_size;
+
+	if (nf_bridge->pkt_otherhost) {
+		skb->pkt_type = PACKET_OTHERHOST;
+		nf_bridge->pkt_otherhost = false;
+	}
+	nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
+	if (daddr_was_changed(skb, nf_bridge)) {
+		if ((err = ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, dev))) {
+			struct in_device *in_dev = __in_dev_get_rcu(dev);
+
+			/* If err equals -EHOSTUNREACH the error is due to a
+			 * martian destination or due to the fact that
+			 * forwarding is disabled. For most martian packets,
+			 * ip_route_output_key() will fail. It won't fail for 2 types of
+			 * martian destinations: loopback destinations and destination
+			 * 0.0.0.0. In both cases the packet will be dropped because the
+			 * destination is the loopback device and not the bridge. */
+			if (err != -EHOSTUNREACH || !in_dev || IN_DEV_FORWARD(in_dev))
+				goto free_skb;
+
+			rt = ip_route_output(dev_net(dev), iph->daddr, 0,
+					     RT_TOS(iph->tos), 0);
+			if (!IS_ERR(rt)) {
+				/* - Bridged-and-DNAT'ed traffic doesn't
+				 *   require ip_forwarding. */
+				if (rt->dst.dev == dev) {
+					skb_dst_set(skb, &rt->dst);
+					goto bridged_dnat;
+				}
+				ip_rt_put(rt);
+			}
+free_skb:
+			kfree_skb(skb);
+			return 0;
+		} else {
+			if (skb_dst(skb)->dev == dev) {
+bridged_dnat:
+				skb->dev = nf_bridge->physindev;
+				nf_bridge_update_protocol(skb);
+				nf_bridge_push_encap_header(skb);
+				NF_HOOK_THRESH(NFPROTO_BRIDGE,
+					       NF_BR_PRE_ROUTING,
+					       sk, skb, skb->dev, NULL,
+					       br_nf_pre_routing_finish_bridge,
+					       1);
+				return 0;
+			}
+			ether_addr_copy(eth_hdr(skb)->h_dest, dev->dev_addr);
+			skb->pkt_type = PACKET_HOST;
+		}
+	} else {
+		rt = bridge_parent_rtable(nf_bridge->physindev);
+		if (!rt) {
+			kfree_skb(skb);
+			return 0;
+		}
+		skb_dst_set_noref(skb, &rt->dst);
+	}
+
+	skb->dev = nf_bridge->physindev;
+	nf_bridge_update_protocol(skb);
+	nf_bridge_push_encap_header(skb);
+	NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, sk, skb,
+		       skb->dev, NULL,
+		       br_handle_frame_finish, 1);
+
+	return 0;
+}
+
+static struct net_device *brnf_get_logical_dev(struct sk_buff *skb, const struct net_device *dev)
+{
+	struct net_device *vlan, *br;
+
+	br = bridge_parent(dev);
+	if (brnf_pass_vlan_indev == 0 || !skb_vlan_tag_present(skb))
+		return br;
+
+	vlan = __vlan_find_dev_deep_rcu(br, skb->vlan_proto,
+				    skb_vlan_tag_get(skb) & VLAN_VID_MASK);
+
+	return vlan ? vlan : br;
+}
+
+/* Some common code for IPv4/IPv6 */
+static struct net_device *setup_pre_routing(struct sk_buff *skb)
+{
+	struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+
+	if (skb->pkt_type == PACKET_OTHERHOST) {
+		skb->pkt_type = PACKET_HOST;
+		nf_bridge->pkt_otherhost = true;
+	}
+
+	nf_bridge->mask |= BRNF_NF_BRIDGE_PREROUTING;
+	nf_bridge->physindev = skb->dev;
+	skb->dev = brnf_get_logical_dev(skb, skb->dev);
+
+	if (skb->protocol == htons(ETH_P_8021Q))
+		nf_bridge->orig_proto = BRNF_PROTO_8021Q;
+	else if (skb->protocol == htons(ETH_P_PPP_SES))
+		nf_bridge->orig_proto = BRNF_PROTO_PPPOE;
+
+	/* Must drop socket now because of tproxy. */
+	skb_orphan(skb);
+	return skb->dev;
+}
+
+/* We only check the length. A bridge shouldn't do any hop-by-hop stuff anyway */
+static int check_hbh_len(struct sk_buff *skb)
+{
+	unsigned char *raw = (u8 *)(ipv6_hdr(skb) + 1);
+	u32 pkt_len;
+	const unsigned char *nh = skb_network_header(skb);
+	int off = raw - nh;
+	int len = (raw[1] + 1) << 3;
+
+	if ((raw + len) - skb->data > skb_headlen(skb))
+		goto bad;
+
+	off += 2;
+	len -= 2;
+
+	while (len > 0) {
+		int optlen = nh[off + 1] + 2;
+
+		switch (nh[off]) {
+		case IPV6_TLV_PAD1:
+			optlen = 1;
+			break;
+
+		case IPV6_TLV_PADN:
+			break;
+
+		case IPV6_TLV_JUMBO:
+			if (nh[off + 1] != 4 || (off & 3) != 2)
+				goto bad;
+			pkt_len = ntohl(*(__be32 *) (nh + off + 2));
+			if (pkt_len <= IPV6_MAXPLEN ||
+			    ipv6_hdr(skb)->payload_len)
+				goto bad;
+			if (pkt_len > skb->len - sizeof(struct ipv6hdr))
+				goto bad;
+			if (pskb_trim_rcsum(skb,
+					    pkt_len + sizeof(struct ipv6hdr)))
+				goto bad;
+			nh = skb_network_header(skb);
+			break;
+		default:
+			if (optlen > len)
+				goto bad;
+			break;
+		}
+		off += optlen;
+		len -= optlen;
+	}
+	if (len == 0)
+		return 0;
+bad:
+	return -1;
+
+}
+
+/* Replicate the checks that IPv6 does on packet reception and pass the packet
+ * to ip6tables, which doesn't support NAT, so things are fairly simple. */
+static unsigned int br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops,
+					   struct sk_buff *skb,
+					   const struct nf_hook_state *state)
+{
+	const struct ipv6hdr *hdr;
+	u32 pkt_len;
+
+	if (skb->len < sizeof(struct ipv6hdr))
+		return NF_DROP;
+
+	if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
+		return NF_DROP;
+
+	hdr = ipv6_hdr(skb);
+
+	if (hdr->version != 6)
+		return NF_DROP;
+
+	pkt_len = ntohs(hdr->payload_len);
+
+	if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
+		if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
+			return NF_DROP;
+		if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr)))
+			return NF_DROP;
+	}
+	if (hdr->nexthdr == NEXTHDR_HOP && check_hbh_len(skb))
+		return NF_DROP;
+
+	nf_bridge_put(skb->nf_bridge);
+	if (!nf_bridge_alloc(skb))
+		return NF_DROP;
+	if (!setup_pre_routing(skb))
+		return NF_DROP;
+
+	skb->protocol = htons(ETH_P_IPV6);
+	NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING, state->sk, skb,
+		skb->dev, NULL,
+		br_nf_pre_routing_finish_ipv6);
+
+	return NF_STOLEN;
+}
+
+/* Direct IPv6 traffic to br_nf_pre_routing_ipv6.
+ * Replicate the checks that IPv4 does on packet reception.
+ * Set skb->dev to the bridge device (i.e. parent of the
+ * receiving device) to make netfilter happy, the REDIRECT
+ * target in particular.  Save the original destination IP
+ * address to be able to detect DNAT afterwards. */
+static unsigned int br_nf_pre_routing(const struct nf_hook_ops *ops,
+				      struct sk_buff *skb,
+				      const struct nf_hook_state *state)
+{
+	struct nf_bridge_info *nf_bridge;
+	struct net_bridge_port *p;
+	struct net_bridge *br;
+	__u32 len = nf_bridge_encap_header_len(skb);
+
+	if (unlikely(!pskb_may_pull(skb, len)))
+		return NF_DROP;
+
+	p = br_port_get_rcu(state->in);
+	if (p == NULL)
+		return NF_DROP;
+	br = p->br;
+
+	if (IS_IPV6(skb) || IS_VLAN_IPV6(skb) || IS_PPPOE_IPV6(skb)) {
+		if (!brnf_call_ip6tables && !br->nf_call_ip6tables)
+			return NF_ACCEPT;
+
+		nf_bridge_pull_encap_header_rcsum(skb);
+		return br_nf_pre_routing_ipv6(ops, skb, state);
+	}
+
+	if (!brnf_call_iptables && !br->nf_call_iptables)
+		return NF_ACCEPT;
+
+	if (!IS_IP(skb) && !IS_VLAN_IP(skb) && !IS_PPPOE_IP(skb))
+		return NF_ACCEPT;
+
+	nf_bridge_pull_encap_header_rcsum(skb);
+
+	if (br_parse_ip_options(skb))
+		return NF_DROP;
+
+	nf_bridge_put(skb->nf_bridge);
+	if (!nf_bridge_alloc(skb))
+		return NF_DROP;
+	if (!setup_pre_routing(skb))
+		return NF_DROP;
+
+	nf_bridge = nf_bridge_info_get(skb);
+	nf_bridge->ipv4_daddr = ip_hdr(skb)->daddr;
+
+	skb->protocol = htons(ETH_P_IP);
+
+	NF_HOOK(NFPROTO_IPV4, NF_INET_PRE_ROUTING, state->sk, skb,
+		skb->dev, NULL,
+		br_nf_pre_routing_finish);
+
+	return NF_STOLEN;
+}
+
+
+/* PF_BRIDGE/LOCAL_IN ************************************************/
+/* The packet is locally destined, which requires a real
+ * dst_entry, so detach the fake one.  On the way up, the
+ * packet would pass through PRE_ROUTING again (which already
+ * took place when the packet entered the bridge), but we
+ * register an IPv4 PRE_ROUTING 'sabotage' hook that will
+ * prevent this from happening. */
+static unsigned int br_nf_local_in(const struct nf_hook_ops *ops,
+				   struct sk_buff *skb,
+				   const struct nf_hook_state *state)
+{
+	br_drop_fake_rtable(skb);
+	return NF_ACCEPT;
+}
+
+/* PF_BRIDGE/FORWARD *************************************************/
+static int br_nf_forward_finish(struct sock *sk, struct sk_buff *skb)
+{
+	struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+	struct net_device *in;
+
+	if (!IS_ARP(skb) && !IS_VLAN_ARP(skb)) {
+		int frag_max_size;
+
+		if (skb->protocol == htons(ETH_P_IP)) {
+			frag_max_size = IPCB(skb)->frag_max_size;
+			BR_INPUT_SKB_CB(skb)->frag_max_size = frag_max_size;
+		}
+
+		in = nf_bridge->physindev;
+		if (nf_bridge->pkt_otherhost) {
+			skb->pkt_type = PACKET_OTHERHOST;
+			nf_bridge->pkt_otherhost = false;
+		}
+		nf_bridge_update_protocol(skb);
+	} else {
+		in = *((struct net_device **)(skb->cb));
+	}
+	nf_bridge_push_encap_header(skb);
+
+	NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_FORWARD, sk, skb,
+		       in, skb->dev, br_forward_finish, 1);
+	return 0;
+}
+
+
+/* This is the 'purely bridged' case.  For IP, we pass the packet to
+ * netfilter with indev and outdev set to the bridge device,
+ * but we are still able to filter on the 'real' indev/outdev
+ * because of the physdev module. For ARP, indev and outdev are the
+ * bridge ports. */
+static unsigned int br_nf_forward_ip(const struct nf_hook_ops *ops,
+				     struct sk_buff *skb,
+				     const struct nf_hook_state *state)
+{
+	struct nf_bridge_info *nf_bridge;
+	struct net_device *parent;
+	u_int8_t pf;
+
+	if (!skb->nf_bridge)
+		return NF_ACCEPT;
+
+	/* Need exclusive nf_bridge_info since we might have multiple
+	 * different physoutdevs. */
+	if (!nf_bridge_unshare(skb))
+		return NF_DROP;
+
+	nf_bridge = nf_bridge_info_get(skb);
+	if (!nf_bridge)
+		return NF_DROP;
+
+	parent = bridge_parent(state->out);
+	if (!parent)
+		return NF_DROP;
+
+	if (IS_IP(skb) || IS_VLAN_IP(skb) || IS_PPPOE_IP(skb))
+		pf = NFPROTO_IPV4;
+	else if (IS_IPV6(skb) || IS_VLAN_IPV6(skb) || IS_PPPOE_IPV6(skb))
+		pf = NFPROTO_IPV6;
+	else
+		return NF_ACCEPT;
+
+	nf_bridge_pull_encap_header(skb);
+
+	if (skb->pkt_type == PACKET_OTHERHOST) {
+		skb->pkt_type = PACKET_HOST;
+		nf_bridge->pkt_otherhost = true;
+	}
+
+	if (pf == NFPROTO_IPV4) {
+		int frag_max = BR_INPUT_SKB_CB(skb)->frag_max_size;
+
+		if (br_parse_ip_options(skb))
+			return NF_DROP;
+
+		IPCB(skb)->frag_max_size = frag_max;
+	}
+
+	nf_bridge->physoutdev = skb->dev;
+	if (pf == NFPROTO_IPV4)
+		skb->protocol = htons(ETH_P_IP);
+	else
+		skb->protocol = htons(ETH_P_IPV6);
+
+	NF_HOOK(pf, NF_INET_FORWARD, NULL, skb,
+		brnf_get_logical_dev(skb, state->in),
+		parent,	br_nf_forward_finish);
+
+	return NF_STOLEN;
+}
+
+static unsigned int br_nf_forward_arp(const struct nf_hook_ops *ops,
+				      struct sk_buff *skb,
+				      const struct nf_hook_state *state)
+{
+	struct net_bridge_port *p;
+	struct net_bridge *br;
+	struct net_device **d = (struct net_device **)(skb->cb);
+
+	p = br_port_get_rcu(state->out);
+	if (p == NULL)
+		return NF_ACCEPT;
+	br = p->br;
+
+	if (!brnf_call_arptables && !br->nf_call_arptables)
+		return NF_ACCEPT;
+
+	if (!IS_ARP(skb)) {
+		if (!IS_VLAN_ARP(skb))
+			return NF_ACCEPT;
+		nf_bridge_pull_encap_header(skb);
+	}
+
+	if (arp_hdr(skb)->ar_pln != 4) {
+		if (IS_VLAN_ARP(skb))
+			nf_bridge_push_encap_header(skb);
+		return NF_ACCEPT;
+	}
+	*d = state->in;
+	NF_HOOK(NFPROTO_ARP, NF_ARP_FORWARD, state->sk, skb,
+		state->in, state->out, br_nf_forward_finish);
+
+	return NF_STOLEN;
+}
+
+#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV4)
+static int br_nf_push_frag_xmit(struct sock *sk, struct sk_buff *skb)
+{
+	struct brnf_frag_data *data;
+	int err;
+
+	data = this_cpu_ptr(&brnf_frag_data_storage);
+	err = skb_cow_head(skb, data->size);
+
+	if (err) {
+		kfree_skb(skb);
+		return 0;
+	}
+
+	skb_copy_to_linear_data_offset(skb, -data->size, data->mac, data->size);
+	__skb_push(skb, data->encap_size);
+
+	return br_dev_queue_push_xmit(sk, skb);
+}
+
+static int br_nf_dev_queue_xmit(struct sock *sk, struct sk_buff *skb)
+{
+	int ret;
+	int frag_max_size;
+	unsigned int mtu_reserved;
+
+	if (skb_is_gso(skb) || skb->protocol != htons(ETH_P_IP))
+		return br_dev_queue_push_xmit(sk, skb);
+
+	mtu_reserved = nf_bridge_mtu_reduction(skb);
+	/* This is wrong! We should preserve the original fragment
+	 * boundaries by preserving frag_list rather than refragmenting.
+	 */
+	if (skb->len + mtu_reserved > skb->dev->mtu) {
+		struct brnf_frag_data *data;
+
+		frag_max_size = BR_INPUT_SKB_CB(skb)->frag_max_size;
+		if (br_parse_ip_options(skb))
+			/* Drop invalid packet */
+			return NF_DROP;
+		IPCB(skb)->frag_max_size = frag_max_size;
+
+		nf_bridge_update_protocol(skb);
+
+		data = this_cpu_ptr(&brnf_frag_data_storage);
+		data->encap_size = nf_bridge_encap_header_len(skb);
+		data->size = ETH_HLEN + data->encap_size;
+
+		skb_copy_from_linear_data_offset(skb, -data->size, data->mac,
+						 data->size);
+
+		ret = ip_fragment(sk, skb, br_nf_push_frag_xmit);
+	} else {
+		ret = br_dev_queue_push_xmit(sk, skb);
+	}
+
+	return ret;
+}
+#else
+static int br_nf_dev_queue_xmit(struct sock *sk, struct sk_buff *skb)
+{
+        return br_dev_queue_push_xmit(sk, skb);
+}
+#endif
+
+/* PF_BRIDGE/POST_ROUTING ********************************************/
+static unsigned int br_nf_post_routing(const struct nf_hook_ops *ops,
+				       struct sk_buff *skb,
+				       const struct nf_hook_state *state)
+{
+	struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+	struct net_device *realoutdev = bridge_parent(skb->dev);
+	u_int8_t pf;
+
+	/* if nf_bridge is set, but ->physoutdev is NULL, this packet came in
+	 * on a bridge, but was delivered locally and is now being routed:
+	 *
+	 * POST_ROUTING was already invoked from the ip stack.
+	 */
+	if (!nf_bridge || !nf_bridge->physoutdev)
+		return NF_ACCEPT;
+
+	if (!realoutdev)
+		return NF_DROP;
+
+	if (IS_IP(skb) || IS_VLAN_IP(skb) || IS_PPPOE_IP(skb))
+		pf = NFPROTO_IPV4;
+	else if (IS_IPV6(skb) || IS_VLAN_IPV6(skb) || IS_PPPOE_IPV6(skb))
+		pf = NFPROTO_IPV6;
+	else
+		return NF_ACCEPT;
+
+	/* We assume any code from br_dev_queue_push_xmit onwards doesn't care
+	 * about the value of skb->pkt_type. */
+	if (skb->pkt_type == PACKET_OTHERHOST) {
+		skb->pkt_type = PACKET_HOST;
+		nf_bridge->pkt_otherhost = true;
+	}
+
+	nf_bridge_pull_encap_header(skb);
+	if (pf == NFPROTO_IPV4)
+		skb->protocol = htons(ETH_P_IP);
+	else
+		skb->protocol = htons(ETH_P_IPV6);
+
+	NF_HOOK(pf, NF_INET_POST_ROUTING, state->sk, skb,
+		NULL, realoutdev,
+		br_nf_dev_queue_xmit);
+
+	return NF_STOLEN;
+}
+
+/* IP/SABOTAGE *****************************************************/
+/* Don't hand locally destined packets to PF_INET(6)/PRE_ROUTING
+ * for the second time. */
+static unsigned int ip_sabotage_in(const struct nf_hook_ops *ops,
+				   struct sk_buff *skb,
+				   const struct nf_hook_state *state)
+{
+	if (skb->nf_bridge &&
+	    !(skb->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)) {
+		return NF_STOP;
+	}
+
+	return NF_ACCEPT;
+}
+
+/* This is called when br_netfilter has called into iptables/netfilter,
+ * and DNAT has taken place on a bridge-forwarded packet.
+ *
+ * neigh->output has created a new MAC header, with local br0 MAC
+ * as saddr.
+ *
+ * This restores the original MAC saddr of the bridged packet
+ * before invoking bridge forward logic to transmit the packet.
+ */
+static void br_nf_pre_routing_finish_bridge_slow(struct sk_buff *skb)
+{
+	struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+
+	skb_pull(skb, ETH_HLEN);
+	nf_bridge->mask &= ~BRNF_BRIDGED_DNAT;
+
+	BUILD_BUG_ON(sizeof(nf_bridge->neigh_header) != (ETH_HLEN - ETH_ALEN));
+
+	skb_copy_to_linear_data_offset(skb, -(ETH_HLEN - ETH_ALEN),
+				       nf_bridge->neigh_header,
+				       ETH_HLEN - ETH_ALEN);
+	skb->dev = nf_bridge->physindev;
+	br_handle_frame_finish(NULL, skb);
+}
+
+static int br_nf_dev_xmit(struct sk_buff *skb)
+{
+	if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
+		br_nf_pre_routing_finish_bridge_slow(skb);
+		return 1;
+	}
+	return 0;
+}
+
+static const struct nf_br_ops br_ops = {
+	.br_dev_xmit_hook =	br_nf_dev_xmit,
+};
+
+void br_netfilter_enable(void)
+{
+}
+EXPORT_SYMBOL_GPL(br_netfilter_enable);
+
+/* For br_nf_post_routing, we need (prio = NF_BR_PRI_LAST), because
+ * br_dev_queue_push_xmit is called afterwards */
+static struct nf_hook_ops br_nf_ops[] __read_mostly = {
+	{
+		.hook = br_nf_pre_routing,
+		.owner = THIS_MODULE,
+		.pf = NFPROTO_BRIDGE,
+		.hooknum = NF_BR_PRE_ROUTING,
+		.priority = NF_BR_PRI_BRNF,
+	},
+	{
+		.hook = br_nf_local_in,
+		.owner = THIS_MODULE,
+		.pf = NFPROTO_BRIDGE,
+		.hooknum = NF_BR_LOCAL_IN,
+		.priority = NF_BR_PRI_BRNF,
+	},
+	{
+		.hook = br_nf_forward_ip,
+		.owner = THIS_MODULE,
+		.pf = NFPROTO_BRIDGE,
+		.hooknum = NF_BR_FORWARD,
+		.priority = NF_BR_PRI_BRNF - 1,
+	},
+	{
+		.hook = br_nf_forward_arp,
+		.owner = THIS_MODULE,
+		.pf = NFPROTO_BRIDGE,
+		.hooknum = NF_BR_FORWARD,
+		.priority = NF_BR_PRI_BRNF,
+	},
+	{
+		.hook = br_nf_post_routing,
+		.owner = THIS_MODULE,
+		.pf = NFPROTO_BRIDGE,
+		.hooknum = NF_BR_POST_ROUTING,
+		.priority = NF_BR_PRI_LAST,
+	},
+	{
+		.hook = ip_sabotage_in,
+		.owner = THIS_MODULE,
+		.pf = NFPROTO_IPV4,
+		.hooknum = NF_INET_PRE_ROUTING,
+		.priority = NF_IP_PRI_FIRST,
+	},
+	{
+		.hook = ip_sabotage_in,
+		.owner = THIS_MODULE,
+		.pf = NFPROTO_IPV6,
+		.hooknum = NF_INET_PRE_ROUTING,
+		.priority = NF_IP6_PRI_FIRST,
+	},
+};
+
+#ifdef CONFIG_SYSCTL
+static
+int brnf_sysctl_call_tables(struct ctl_table *ctl, int write,
+			    void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	int ret;
+
+	ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
+
+	if (write && *(int *)(ctl->data))
+		*(int *)(ctl->data) = 1;
+	return ret;
+}
+
+static struct ctl_table brnf_table[] = {
+	{
+		.procname	= "bridge-nf-call-arptables",
+		.data		= &brnf_call_arptables,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= brnf_sysctl_call_tables,
+	},
+	{
+		.procname	= "bridge-nf-call-iptables",
+		.data		= &brnf_call_iptables,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= brnf_sysctl_call_tables,
+	},
+	{
+		.procname	= "bridge-nf-call-ip6tables",
+		.data		= &brnf_call_ip6tables,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= brnf_sysctl_call_tables,
+	},
+	{
+		.procname	= "bridge-nf-filter-vlan-tagged",
+		.data		= &brnf_filter_vlan_tagged,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= brnf_sysctl_call_tables,
+	},
+	{
+		.procname	= "bridge-nf-filter-pppoe-tagged",
+		.data		= &brnf_filter_pppoe_tagged,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= brnf_sysctl_call_tables,
+	},
+	{
+		.procname	= "bridge-nf-pass-vlan-input-dev",
+		.data		= &brnf_pass_vlan_indev,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= brnf_sysctl_call_tables,
+	},
+	{ }
+};
+#endif
+
+static int __init br_netfilter_init(void)
+{
+	int ret;
+
+	ret = nf_register_hooks(br_nf_ops, ARRAY_SIZE(br_nf_ops));
+	if (ret < 0)
+		return ret;
+
+#ifdef CONFIG_SYSCTL
+	brnf_sysctl_header = register_net_sysctl(&init_net, "net/bridge", brnf_table);
+	if (brnf_sysctl_header == NULL) {
+		printk(KERN_WARNING
+		       "br_netfilter: can't register to sysctl.\n");
+		nf_unregister_hooks(br_nf_ops, ARRAY_SIZE(br_nf_ops));
+		return -ENOMEM;
+	}
+#endif
+	RCU_INIT_POINTER(nf_br_ops, &br_ops);
+	printk(KERN_NOTICE "Bridge firewalling registered\n");
+	return 0;
+}
+
+static void __exit br_netfilter_fini(void)
+{
+	RCU_INIT_POINTER(nf_br_ops, NULL);
+	nf_unregister_hooks(br_nf_ops, ARRAY_SIZE(br_nf_ops));
+#ifdef CONFIG_SYSCTL
+	unregister_net_sysctl_table(brnf_sysctl_header);
+#endif
+}
+
+module_init(br_netfilter_init);
+module_exit(br_netfilter_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Lennert Buytenhek <buytenh@gnu.org>");
+MODULE_AUTHOR("Bart De Schuymer <bdschuym@pandora.be>");
+MODULE_DESCRIPTION("Linux ethernet netfilter firewall bridge");
diff --git a/kernel/net/bridge/br_netlink.c b/kernel/net/bridge/br_netlink.c
new file mode 100644
index 000000000..4b5c23699
--- /dev/null
+++ b/kernel/net/bridge/br_netlink.c
@@ -0,0 +1,888 @@
+/*
+ *	Bridge netlink control interface
+ *
+ *	Authors:
+ *	Stephen Hemminger		<shemminger@osdl.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/etherdevice.h>
+#include <net/rtnetlink.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
+#include <net/switchdev.h>
+#include <uapi/linux/if_bridge.h>
+
+#include "br_private.h"
+#include "br_private_stp.h"
+
+static int br_get_num_vlan_infos(const struct net_port_vlans *pv,
+				 u32 filter_mask)
+{
+	u16 vid_range_start = 0, vid_range_end = 0;
+	u16 vid_range_flags = 0;
+	u16 pvid, vid, flags;
+	int num_vlans = 0;
+
+	if (filter_mask & RTEXT_FILTER_BRVLAN)
+		return pv->num_vlans;
+
+	if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
+		return 0;
+
+	/* Count number of vlan info's
+	 */
+	pvid = br_get_pvid(pv);
+	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+		flags = 0;
+		if (vid == pvid)
+			flags |= BRIDGE_VLAN_INFO_PVID;
+
+		if (test_bit(vid, pv->untagged_bitmap))
+			flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+		if (vid_range_start == 0) {
+			goto initvars;
+		} else if ((vid - vid_range_end) == 1 &&
+			flags == vid_range_flags) {
+			vid_range_end = vid;
+			continue;
+		} else {
+			if ((vid_range_end - vid_range_start) > 0)
+				num_vlans += 2;
+			else
+				num_vlans += 1;
+		}
+initvars:
+		vid_range_start = vid;
+		vid_range_end = vid;
+		vid_range_flags = flags;
+	}
+
+	if (vid_range_start != 0) {
+		if ((vid_range_end - vid_range_start) > 0)
+			num_vlans += 2;
+		else
+			num_vlans += 1;
+	}
+
+	return num_vlans;
+}
+
+static size_t br_get_link_af_size_filtered(const struct net_device *dev,
+					   u32 filter_mask)
+{
+	struct net_port_vlans *pv;
+	int num_vlan_infos;
+
+	rcu_read_lock();
+	if (br_port_exists(dev))
+		pv = nbp_get_vlan_info(br_port_get_rcu(dev));
+	else if (dev->priv_flags & IFF_EBRIDGE)
+		pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
+	else
+		pv = NULL;
+	if (pv)
+		num_vlan_infos = br_get_num_vlan_infos(pv, filter_mask);
+	else
+		num_vlan_infos = 0;
+	rcu_read_unlock();
+
+	if (!num_vlan_infos)
+		return 0;
+
+	/* Each VLAN is returned in bridge_vlan_info along with flags */
+	return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
+}
+
+static inline size_t br_port_info_size(void)
+{
+	return nla_total_size(1)	/* IFLA_BRPORT_STATE  */
+		+ nla_total_size(2)	/* IFLA_BRPORT_PRIORITY */
+		+ nla_total_size(4)	/* IFLA_BRPORT_COST */
+		+ nla_total_size(1)	/* IFLA_BRPORT_MODE */
+		+ nla_total_size(1)	/* IFLA_BRPORT_GUARD */
+		+ nla_total_size(1)	/* IFLA_BRPORT_PROTECT */
+		+ nla_total_size(1)	/* IFLA_BRPORT_FAST_LEAVE */
+		+ nla_total_size(1)	/* IFLA_BRPORT_LEARNING */
+		+ nla_total_size(1)	/* IFLA_BRPORT_UNICAST_FLOOD */
+		+ 0;
+}
+
+static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
+{
+	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
+		+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
+		+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
+		+ nla_total_size(4) /* IFLA_MASTER */
+		+ nla_total_size(4) /* IFLA_MTU */
+		+ nla_total_size(4) /* IFLA_LINK */
+		+ nla_total_size(1) /* IFLA_OPERSTATE */
+		+ nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
+		+ nla_total_size(br_get_link_af_size_filtered(dev,
+				 filter_mask)); /* IFLA_AF_SPEC */
+}
+
+static int br_port_fill_attrs(struct sk_buff *skb,
+			      const struct net_bridge_port *p)
+{
+	u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
+
+	if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
+	    nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
+	    nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
+	    nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
+	    nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
+		       !!(p->flags & BR_PROXYARP_WIFI)))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
+				    u16 vid_end, u16 flags)
+{
+	struct  bridge_vlan_info vinfo;
+
+	if ((vid_end - vid_start) > 0) {
+		/* add range to skb */
+		vinfo.vid = vid_start;
+		vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
+		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+			    sizeof(vinfo), &vinfo))
+			goto nla_put_failure;
+
+		vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
+
+		vinfo.vid = vid_end;
+		vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
+		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+			    sizeof(vinfo), &vinfo))
+			goto nla_put_failure;
+	} else {
+		vinfo.vid = vid_start;
+		vinfo.flags = flags;
+		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+			    sizeof(vinfo), &vinfo))
+			goto nla_put_failure;
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
+					 const struct net_port_vlans *pv)
+{
+	u16 vid_range_start = 0, vid_range_end = 0;
+	u16 vid_range_flags = 0;
+	u16 pvid, vid, flags;
+	int err = 0;
+
+	/* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
+	 * and mark vlan info with begin and end flags
+	 * if vlaninfo represents a range
+	 */
+	pvid = br_get_pvid(pv);
+	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+		flags = 0;
+		if (vid == pvid)
+			flags |= BRIDGE_VLAN_INFO_PVID;
+
+		if (test_bit(vid, pv->untagged_bitmap))
+			flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+		if (vid_range_start == 0) {
+			goto initvars;
+		} else if ((vid - vid_range_end) == 1 &&
+			flags == vid_range_flags) {
+			vid_range_end = vid;
+			continue;
+		} else {
+			err = br_fill_ifvlaninfo_range(skb, vid_range_start,
+						       vid_range_end,
+						       vid_range_flags);
+			if (err)
+				return err;
+		}
+
+initvars:
+		vid_range_start = vid;
+		vid_range_end = vid;
+		vid_range_flags = flags;
+	}
+
+	if (vid_range_start != 0) {
+		/* Call it once more to send any left over vlans */
+		err = br_fill_ifvlaninfo_range(skb, vid_range_start,
+					       vid_range_end,
+					       vid_range_flags);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int br_fill_ifvlaninfo(struct sk_buff *skb,
+			      const struct net_port_vlans *pv)
+{
+	struct bridge_vlan_info vinfo;
+	u16 pvid, vid;
+
+	pvid = br_get_pvid(pv);
+	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+		vinfo.vid = vid;
+		vinfo.flags = 0;
+		if (vid == pvid)
+			vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
+
+		if (test_bit(vid, pv->untagged_bitmap))
+			vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+		if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+			    sizeof(vinfo), &vinfo))
+			goto nla_put_failure;
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+/*
+ * Create one netlink message for one interface
+ * Contains port and master info as well as carrier and bridge state.
+ */
+static int br_fill_ifinfo(struct sk_buff *skb,
+			  const struct net_bridge_port *port,
+			  u32 pid, u32 seq, int event, unsigned int flags,
+			  u32 filter_mask, const struct net_device *dev)
+{
+	const struct net_bridge *br;
+	struct ifinfomsg *hdr;
+	struct nlmsghdr *nlh;
+	u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
+
+	if (port)
+		br = port->br;
+	else
+		br = netdev_priv(dev);
+
+	br_debug(br, "br_fill_info event %d port %s master %s\n",
+		     event, dev->name, br->dev->name);
+
+	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
+	if (nlh == NULL)
+		return -EMSGSIZE;
+
+	hdr = nlmsg_data(nlh);
+	hdr->ifi_family = AF_BRIDGE;
+	hdr->__ifi_pad = 0;
+	hdr->ifi_type = dev->type;
+	hdr->ifi_index = dev->ifindex;
+	hdr->ifi_flags = dev_get_flags(dev);
+	hdr->ifi_change = 0;
+
+	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
+	    nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
+	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
+	    nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
+	    (dev->addr_len &&
+	     nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
+	    (dev->ifindex != dev_get_iflink(dev) &&
+	     nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
+		goto nla_put_failure;
+
+	if (event == RTM_NEWLINK && port) {
+		struct nlattr *nest
+			= nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
+
+		if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
+			goto nla_put_failure;
+		nla_nest_end(skb, nest);
+	}
+
+	/* Check if  the VID information is requested */
+	if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
+	    (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
+		const struct net_port_vlans *pv;
+		struct nlattr *af;
+		int err;
+
+		if (port)
+			pv = nbp_get_vlan_info(port);
+		else
+			pv = br_get_vlan_info(br);
+
+		if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
+			goto done;
+
+		af = nla_nest_start(skb, IFLA_AF_SPEC);
+		if (!af)
+			goto nla_put_failure;
+
+		if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
+			err = br_fill_ifvlaninfo_compressed(skb, pv);
+		else
+			err = br_fill_ifvlaninfo(skb, pv);
+		if (err)
+			goto nla_put_failure;
+		nla_nest_end(skb, af);
+	}
+
+done:
+	nlmsg_end(skb, nlh);
+	return 0;
+
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+/*
+ * Notify listeners of a change in port information
+ */
+void br_ifinfo_notify(int event, struct net_bridge_port *port)
+{
+	struct net *net;
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+	u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
+
+	if (!port)
+		return;
+
+	net = dev_net(port->dev);
+	br_debug(port->br, "port %u(%s) event %d\n",
+		 (unsigned int)port->port_no, port->dev->name, event);
+
+	skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
+	if (skb == NULL)
+		goto errout;
+
+	err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
+	if (err < 0) {
+		/* -EMSGSIZE implies BUG in br_nlmsg_size() */
+		WARN_ON(err == -EMSGSIZE);
+		kfree_skb(skb);
+		goto errout;
+	}
+	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
+	return;
+errout:
+	rtnl_set_sk_err(net, RTNLGRP_LINK, err);
+}
+
+
+/*
+ * Dump information about all ports, in response to GETLINK
+ */
+int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
+	       struct net_device *dev, u32 filter_mask, int nlflags)
+{
+	struct net_bridge_port *port = br_port_get_rtnl(dev);
+
+	if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
+	    !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
+		return 0;
+
+	return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
+			      filter_mask, dev);
+}
+
+static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
+			int cmd, struct bridge_vlan_info *vinfo)
+{
+	int err = 0;
+
+	switch (cmd) {
+	case RTM_SETLINK:
+		if (p) {
+			err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
+			if (err)
+				break;
+
+			if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
+				err = br_vlan_add(p->br, vinfo->vid,
+						  vinfo->flags);
+		} else {
+			err = br_vlan_add(br, vinfo->vid, vinfo->flags);
+		}
+		break;
+
+	case RTM_DELLINK:
+		if (p) {
+			nbp_vlan_delete(p, vinfo->vid);
+			if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
+				br_vlan_delete(p->br, vinfo->vid);
+		} else {
+			br_vlan_delete(br, vinfo->vid);
+		}
+		break;
+	}
+
+	return err;
+}
+
+static int br_afspec(struct net_bridge *br,
+		     struct net_bridge_port *p,
+		     struct nlattr *af_spec,
+		     int cmd)
+{
+	struct bridge_vlan_info *vinfo_start = NULL;
+	struct bridge_vlan_info *vinfo = NULL;
+	struct nlattr *attr;
+	int err = 0;
+	int rem;
+
+	nla_for_each_nested(attr, af_spec, rem) {
+		if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
+			continue;
+		if (nla_len(attr) != sizeof(struct bridge_vlan_info))
+			return -EINVAL;
+		vinfo = nla_data(attr);
+		if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
+			if (vinfo_start)
+				return -EINVAL;
+			vinfo_start = vinfo;
+			continue;
+		}
+
+		if (vinfo_start) {
+			struct bridge_vlan_info tmp_vinfo;
+			int v;
+
+			if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
+				return -EINVAL;
+
+			if (vinfo->vid <= vinfo_start->vid)
+				return -EINVAL;
+
+			memcpy(&tmp_vinfo, vinfo_start,
+			       sizeof(struct bridge_vlan_info));
+
+			for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
+				tmp_vinfo.vid = v;
+				err = br_vlan_info(br, p, cmd, &tmp_vinfo);
+				if (err)
+					break;
+			}
+			vinfo_start = NULL;
+		} else {
+			err = br_vlan_info(br, p, cmd, vinfo);
+		}
+		if (err)
+			break;
+	}
+
+	return err;
+}
+
+static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
+	[IFLA_BRPORT_STATE]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_COST]	= { .type = NLA_U32 },
+	[IFLA_BRPORT_PRIORITY]	= { .type = NLA_U16 },
+	[IFLA_BRPORT_MODE]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_GUARD]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_PROTECT]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
+	[IFLA_BRPORT_LEARNING]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
+};
+
+/* Change the state of the port and notify spanning tree */
+static int br_set_port_state(struct net_bridge_port *p, u8 state)
+{
+	if (state > BR_STATE_BLOCKING)
+		return -EINVAL;
+
+	/* if kernel STP is running, don't allow changes */
+	if (p->br->stp_enabled == BR_KERNEL_STP)
+		return -EBUSY;
+
+	/* if device is not up, change is not allowed
+	 * if link is not present, only allowable state is disabled
+	 */
+	if (!netif_running(p->dev) ||
+	    (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
+		return -ENETDOWN;
+
+	br_set_state(p, state);
+	br_log_state(p);
+	br_port_state_selection(p->br);
+	return 0;
+}
+
+/* Set/clear or port flags based on attribute */
+static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
+			   int attrtype, unsigned long mask)
+{
+	if (tb[attrtype]) {
+		u8 flag = nla_get_u8(tb[attrtype]);
+		if (flag)
+			p->flags |= mask;
+		else
+			p->flags &= ~mask;
+	}
+}
+
+/* Process bridge protocol info on port */
+static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
+{
+	int err;
+	unsigned long old_flags = p->flags;
+
+	br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
+	br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
+	br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
+	br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
+	br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
+	br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
+	br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
+	br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
+
+	if (tb[IFLA_BRPORT_COST]) {
+		err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
+		if (err)
+			return err;
+	}
+
+	if (tb[IFLA_BRPORT_PRIORITY]) {
+		err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
+		if (err)
+			return err;
+	}
+
+	if (tb[IFLA_BRPORT_STATE]) {
+		err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
+		if (err)
+			return err;
+	}
+
+	br_port_flags_change(p, old_flags ^ p->flags);
+	return 0;
+}
+
+/* Change state and parameters on port. */
+int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
+{
+	struct nlattr *protinfo;
+	struct nlattr *afspec;
+	struct net_bridge_port *p;
+	struct nlattr *tb[IFLA_BRPORT_MAX + 1];
+	int err = 0, ret_offload = 0;
+
+	protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
+	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
+	if (!protinfo && !afspec)
+		return 0;
+
+	p = br_port_get_rtnl(dev);
+	/* We want to accept dev as bridge itself if the AF_SPEC
+	 * is set to see if someone is setting vlan info on the bridge
+	 */
+	if (!p && !afspec)
+		return -EINVAL;
+
+	if (p && protinfo) {
+		if (protinfo->nla_type & NLA_F_NESTED) {
+			err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
+					       protinfo, br_port_policy);
+			if (err)
+				return err;
+
+			spin_lock_bh(&p->br->lock);
+			err = br_setport(p, tb);
+			spin_unlock_bh(&p->br->lock);
+		} else {
+			/* Binary compatibility with old RSTP */
+			if (nla_len(protinfo) < sizeof(u8))
+				return -EINVAL;
+
+			spin_lock_bh(&p->br->lock);
+			err = br_set_port_state(p, nla_get_u8(protinfo));
+			spin_unlock_bh(&p->br->lock);
+		}
+		if (err)
+			goto out;
+	}
+
+	if (afspec) {
+		err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
+				afspec, RTM_SETLINK);
+	}
+
+	if (p && !(flags & BRIDGE_FLAGS_SELF)) {
+		/* set bridge attributes in hardware if supported
+		 */
+		ret_offload = netdev_switch_port_bridge_setlink(dev, nlh,
+								flags);
+		if (ret_offload && ret_offload != -EOPNOTSUPP)
+			br_warn(p->br, "error setting attrs on port %u(%s)\n",
+				(unsigned int)p->port_no, p->dev->name);
+	}
+
+	if (err == 0)
+		br_ifinfo_notify(RTM_NEWLINK, p);
+out:
+	return err;
+}
+
+/* Delete port information */
+int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
+{
+	struct nlattr *afspec;
+	struct net_bridge_port *p;
+	int err = 0, ret_offload = 0;
+
+	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
+	if (!afspec)
+		return 0;
+
+	p = br_port_get_rtnl(dev);
+	/* We want to accept dev as bridge itself as well */
+	if (!p && !(dev->priv_flags & IFF_EBRIDGE))
+		return -EINVAL;
+
+	err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
+			afspec, RTM_DELLINK);
+	if (err == 0)
+		/* Send RTM_NEWLINK because userspace
+		 * expects RTM_NEWLINK for vlan dels
+		 */
+		br_ifinfo_notify(RTM_NEWLINK, p);
+
+	if (p && !(flags & BRIDGE_FLAGS_SELF)) {
+		/* del bridge attributes in hardware
+		 */
+		ret_offload = netdev_switch_port_bridge_dellink(dev, nlh,
+								flags);
+		if (ret_offload && ret_offload != -EOPNOTSUPP)
+			br_warn(p->br, "error deleting attrs on port %u (%s)\n",
+				(unsigned int)p->port_no, p->dev->name);
+	}
+
+	return err;
+}
+static int br_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+	if (tb[IFLA_ADDRESS]) {
+		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+			return -EINVAL;
+		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+			return -EADDRNOTAVAIL;
+	}
+
+	return 0;
+}
+
+static int br_dev_newlink(struct net *src_net, struct net_device *dev,
+			  struct nlattr *tb[], struct nlattr *data[])
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	if (tb[IFLA_ADDRESS]) {
+		spin_lock_bh(&br->lock);
+		br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
+		spin_unlock_bh(&br->lock);
+	}
+
+	return register_netdevice(dev);
+}
+
+static int br_port_slave_changelink(struct net_device *brdev,
+				    struct net_device *dev,
+				    struct nlattr *tb[],
+				    struct nlattr *data[])
+{
+	if (!data)
+		return 0;
+	return br_setport(br_port_get_rtnl(dev), data);
+}
+
+static int br_port_fill_slave_info(struct sk_buff *skb,
+				   const struct net_device *brdev,
+				   const struct net_device *dev)
+{
+	return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
+}
+
+static size_t br_port_get_slave_size(const struct net_device *brdev,
+				     const struct net_device *dev)
+{
+	return br_port_info_size();
+}
+
+static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
+	[IFLA_BR_FORWARD_DELAY]	= { .type = NLA_U32 },
+	[IFLA_BR_HELLO_TIME]	= { .type = NLA_U32 },
+	[IFLA_BR_MAX_AGE]	= { .type = NLA_U32 },
+	[IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
+	[IFLA_BR_STP_STATE] = { .type = NLA_U32 },
+	[IFLA_BR_PRIORITY] = { .type = NLA_U16 },
+};
+
+static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
+			 struct nlattr *data[])
+{
+	struct net_bridge *br = netdev_priv(brdev);
+	int err;
+
+	if (!data)
+		return 0;
+
+	if (data[IFLA_BR_FORWARD_DELAY]) {
+		err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BR_HELLO_TIME]) {
+		err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BR_MAX_AGE]) {
+		err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
+		if (err)
+			return err;
+	}
+
+	if (data[IFLA_BR_AGEING_TIME]) {
+		u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
+
+		br->ageing_time = clock_t_to_jiffies(ageing_time);
+	}
+
+	if (data[IFLA_BR_STP_STATE]) {
+		u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
+
+		br_stp_set_enabled(br, stp_enabled);
+	}
+
+	if (data[IFLA_BR_PRIORITY]) {
+		u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
+
+		br_stp_set_bridge_priority(br, priority);
+	}
+
+	return 0;
+}
+
+static size_t br_get_size(const struct net_device *brdev)
+{
+	return nla_total_size(sizeof(u32)) +	/* IFLA_BR_FORWARD_DELAY  */
+	       nla_total_size(sizeof(u32)) +	/* IFLA_BR_HELLO_TIME */
+	       nla_total_size(sizeof(u32)) +	/* IFLA_BR_MAX_AGE */
+	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_AGEING_TIME */
+	       nla_total_size(sizeof(u32)) +    /* IFLA_BR_STP_STATE */
+	       nla_total_size(sizeof(u16)) +    /* IFLA_BR_PRIORITY */
+	       0;
+}
+
+static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
+{
+	struct net_bridge *br = netdev_priv(brdev);
+	u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
+	u32 hello_time = jiffies_to_clock_t(br->hello_time);
+	u32 age_time = jiffies_to_clock_t(br->max_age);
+	u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
+	u32 stp_enabled = br->stp_enabled;
+	u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
+
+	if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
+	    nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
+	    nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
+	    nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
+	    nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
+	    nla_put_u16(skb, IFLA_BR_PRIORITY, priority))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static size_t br_get_link_af_size(const struct net_device *dev)
+{
+	struct net_port_vlans *pv;
+
+	if (br_port_exists(dev))
+		pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
+	else if (dev->priv_flags & IFF_EBRIDGE)
+		pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
+	else
+		return 0;
+
+	if (!pv)
+		return 0;
+
+	/* Each VLAN is returned in bridge_vlan_info along with flags */
+	return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
+}
+
+static struct rtnl_af_ops br_af_ops __read_mostly = {
+	.family			= AF_BRIDGE,
+	.get_link_af_size	= br_get_link_af_size,
+};
+
+struct rtnl_link_ops br_link_ops __read_mostly = {
+	.kind			= "bridge",
+	.priv_size		= sizeof(struct net_bridge),
+	.setup			= br_dev_setup,
+	.maxtype		= IFLA_BRPORT_MAX,
+	.policy			= br_policy,
+	.validate		= br_validate,
+	.newlink		= br_dev_newlink,
+	.changelink		= br_changelink,
+	.dellink		= br_dev_delete,
+	.get_size		= br_get_size,
+	.fill_info		= br_fill_info,
+
+	.slave_maxtype		= IFLA_BRPORT_MAX,
+	.slave_policy		= br_port_policy,
+	.slave_changelink	= br_port_slave_changelink,
+	.get_slave_size		= br_port_get_slave_size,
+	.fill_slave_info	= br_port_fill_slave_info,
+};
+
+int __init br_netlink_init(void)
+{
+	int err;
+
+	br_mdb_init();
+	rtnl_af_register(&br_af_ops);
+
+	err = rtnl_link_register(&br_link_ops);
+	if (err)
+		goto out_af;
+
+	return 0;
+
+out_af:
+	rtnl_af_unregister(&br_af_ops);
+	br_mdb_uninit();
+	return err;
+}
+
+void br_netlink_fini(void)
+{
+	br_mdb_uninit();
+	rtnl_af_unregister(&br_af_ops);
+	rtnl_link_unregister(&br_link_ops);
+}
diff --git a/kernel/net/bridge/br_nf_core.c b/kernel/net/bridge/br_nf_core.c
new file mode 100644
index 000000000..20cbb727d
--- /dev/null
+++ b/kernel/net/bridge/br_nf_core.c
@@ -0,0 +1,95 @@
+/*
+ *	Handle firewalling core
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *	Bart De Schuymer		<bdschuym@pandora.be>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ *
+ *	Lennert dedicates this file to Kerstin Wurdinger.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/in_route.h>
+#include <linux/inetdevice.h>
+#include <net/route.h>
+
+#include "br_private.h"
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+
+static void fake_update_pmtu(struct dst_entry *dst, struct sock *sk,
+			     struct sk_buff *skb, u32 mtu)
+{
+}
+
+static void fake_redirect(struct dst_entry *dst, struct sock *sk,
+			  struct sk_buff *skb)
+{
+}
+
+static u32 *fake_cow_metrics(struct dst_entry *dst, unsigned long old)
+{
+	return NULL;
+}
+
+static struct neighbour *fake_neigh_lookup(const struct dst_entry *dst,
+					   struct sk_buff *skb,
+					   const void *daddr)
+{
+	return NULL;
+}
+
+static unsigned int fake_mtu(const struct dst_entry *dst)
+{
+	return dst->dev->mtu;
+}
+
+static struct dst_ops fake_dst_ops = {
+	.family		= AF_INET,
+	.update_pmtu	= fake_update_pmtu,
+	.redirect	= fake_redirect,
+	.cow_metrics	= fake_cow_metrics,
+	.neigh_lookup	= fake_neigh_lookup,
+	.mtu		= fake_mtu,
+};
+
+/*
+ * Initialize bogus route table used to keep netfilter happy.
+ * Currently, we fill in the PMTU entry because netfilter
+ * refragmentation needs it, and the rt_flags entry because
+ * ipt_REJECT needs it.  Future netfilter modules might
+ * require us to fill additional fields.
+ */
+static const u32 br_dst_default_metrics[RTAX_MAX] = {
+	[RTAX_MTU - 1] = 1500,
+};
+
+void br_netfilter_rtable_init(struct net_bridge *br)
+{
+	struct rtable *rt = &br->fake_rtable;
+
+	atomic_set(&rt->dst.__refcnt, 1);
+	rt->dst.dev = br->dev;
+	rt->dst.path = &rt->dst;
+	dst_init_metrics(&rt->dst, br_dst_default_metrics, true);
+	rt->dst.flags	= DST_NOXFRM | DST_FAKE_RTABLE;
+	rt->dst.ops = &fake_dst_ops;
+}
+
+int __init br_nf_core_init(void)
+{
+	return dst_entries_init(&fake_dst_ops);
+}
+
+void br_nf_core_fini(void)
+{
+	dst_entries_destroy(&fake_dst_ops);
+}
diff --git a/kernel/net/bridge/br_private.h b/kernel/net/bridge/br_private.h
new file mode 100644
index 000000000..3362c2940
--- /dev/null
+++ b/kernel/net/bridge/br_private.h
@@ -0,0 +1,851 @@
+/*
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _BR_PRIVATE_H
+#define _BR_PRIVATE_H
+
+#include <linux/netdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/netpoll.h>
+#include <linux/u64_stats_sync.h>
+#include <net/route.h>
+#include <linux/if_vlan.h>
+
+#define BR_HASH_BITS 8
+#define BR_HASH_SIZE (1 << BR_HASH_BITS)
+
+#define BR_HOLD_TIME (1*HZ)
+
+#define BR_PORT_BITS	10
+#define BR_MAX_PORTS	(1<<BR_PORT_BITS)
+#define BR_VLAN_BITMAP_LEN	BITS_TO_LONGS(VLAN_N_VID)
+
+#define BR_VERSION	"2.3"
+
+/* Control of forwarding link local multicast */
+#define BR_GROUPFWD_DEFAULT	0
+/* Don't allow forwarding control protocols like STP and LLDP */
+#define BR_GROUPFWD_RESTRICTED	0x4007u
+/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
+#define BR_GROUPFWD_8021AD	0xB801u
+
+/* Path to usermode spanning tree program */
+#define BR_STP_PROG	"/sbin/bridge-stp"
+
+typedef struct bridge_id bridge_id;
+typedef struct mac_addr mac_addr;
+typedef __u16 port_id;
+
+struct bridge_id
+{
+	unsigned char	prio[2];
+	unsigned char	addr[ETH_ALEN];
+};
+
+struct mac_addr
+{
+	unsigned char	addr[ETH_ALEN];
+};
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+/* our own querier */
+struct bridge_mcast_own_query {
+	struct timer_list	timer;
+	u32			startup_sent;
+};
+
+/* other querier */
+struct bridge_mcast_other_query {
+	struct timer_list		timer;
+	unsigned long			delay_time;
+};
+
+/* selected querier */
+struct bridge_mcast_querier {
+	struct br_ip addr;
+	struct net_bridge_port __rcu	*port;
+};
+#endif
+
+struct net_port_vlans {
+	u16				port_idx;
+	u16				pvid;
+	union {
+		struct net_bridge_port		*port;
+		struct net_bridge		*br;
+	}				parent;
+	struct rcu_head			rcu;
+	unsigned long			vlan_bitmap[BR_VLAN_BITMAP_LEN];
+	unsigned long			untagged_bitmap[BR_VLAN_BITMAP_LEN];
+	u16				num_vlans;
+};
+
+struct net_bridge_fdb_entry
+{
+	struct hlist_node		hlist;
+	struct net_bridge_port		*dst;
+
+	struct rcu_head			rcu;
+	unsigned long			updated;
+	unsigned long			used;
+	mac_addr			addr;
+	unsigned char			is_local:1,
+					is_static:1,
+					added_by_user:1,
+					added_by_external_learn:1;
+	__u16				vlan_id;
+};
+
+struct net_bridge_port_group {
+	struct net_bridge_port		*port;
+	struct net_bridge_port_group __rcu *next;
+	struct hlist_node		mglist;
+	struct rcu_head			rcu;
+	struct timer_list		timer;
+	struct br_ip			addr;
+	unsigned char			state;
+};
+
+struct net_bridge_mdb_entry
+{
+	struct hlist_node		hlist[2];
+	struct net_bridge		*br;
+	struct net_bridge_port_group __rcu *ports;
+	struct rcu_head			rcu;
+	struct timer_list		timer;
+	struct br_ip			addr;
+	bool				mglist;
+};
+
+struct net_bridge_mdb_htable
+{
+	struct hlist_head		*mhash;
+	struct rcu_head			rcu;
+	struct net_bridge_mdb_htable	*old;
+	u32				size;
+	u32				max;
+	u32				secret;
+	u32				ver;
+};
+
+struct net_bridge_port
+{
+	struct net_bridge		*br;
+	struct net_device		*dev;
+	struct list_head		list;
+
+	/* STP */
+	u8				priority;
+	u8				state;
+	u16				port_no;
+	unsigned char			topology_change_ack;
+	unsigned char			config_pending;
+	port_id				port_id;
+	port_id				designated_port;
+	bridge_id			designated_root;
+	bridge_id			designated_bridge;
+	u32				path_cost;
+	u32				designated_cost;
+	unsigned long			designated_age;
+
+	struct timer_list		forward_delay_timer;
+	struct timer_list		hold_timer;
+	struct timer_list		message_age_timer;
+	struct kobject			kobj;
+	struct rcu_head			rcu;
+
+	unsigned long 			flags;
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+	struct bridge_mcast_own_query	ip4_own_query;
+#if IS_ENABLED(CONFIG_IPV6)
+	struct bridge_mcast_own_query	ip6_own_query;
+#endif /* IS_ENABLED(CONFIG_IPV6) */
+	unsigned char			multicast_router;
+	struct timer_list		multicast_router_timer;
+	struct hlist_head		mglist;
+	struct hlist_node		rlist;
+#endif
+
+#ifdef CONFIG_SYSFS
+	char				sysfs_name[IFNAMSIZ];
+#endif
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	struct netpoll			*np;
+#endif
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+	struct net_port_vlans __rcu	*vlan_info;
+#endif
+};
+
+#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
+#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
+
+#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
+
+static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
+{
+	return rcu_dereference(dev->rx_handler_data);
+}
+
+static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
+{
+	return br_port_exists(dev) ?
+		rtnl_dereference(dev->rx_handler_data) : NULL;
+}
+
+struct net_bridge
+{
+	spinlock_t			lock;
+	struct list_head		port_list;
+	struct net_device		*dev;
+
+	struct pcpu_sw_netstats		__percpu *stats;
+	spinlock_t			hash_lock;
+	struct hlist_head		hash[BR_HASH_SIZE];
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+	struct rtable 			fake_rtable;
+	bool				nf_call_iptables;
+	bool				nf_call_ip6tables;
+	bool				nf_call_arptables;
+#endif
+	u16				group_fwd_mask;
+	u16				group_fwd_mask_required;
+
+	/* STP */
+	bridge_id			designated_root;
+	bridge_id			bridge_id;
+	u32				root_path_cost;
+	unsigned long			max_age;
+	unsigned long			hello_time;
+	unsigned long			forward_delay;
+	unsigned long			bridge_max_age;
+	unsigned long			ageing_time;
+	unsigned long			bridge_hello_time;
+	unsigned long			bridge_forward_delay;
+
+	u8				group_addr[ETH_ALEN];
+	bool				group_addr_set;
+	u16				root_port;
+
+	enum {
+		BR_NO_STP, 		/* no spanning tree */
+		BR_KERNEL_STP,		/* old STP in kernel */
+		BR_USER_STP,		/* new RSTP in userspace */
+	} stp_enabled;
+
+	unsigned char			topology_change;
+	unsigned char			topology_change_detected;
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+	unsigned char			multicast_router;
+
+	u8				multicast_disabled:1;
+	u8				multicast_querier:1;
+	u8				multicast_query_use_ifaddr:1;
+
+	u32				hash_elasticity;
+	u32				hash_max;
+
+	u32				multicast_last_member_count;
+	u32				multicast_startup_query_count;
+
+	unsigned long			multicast_last_member_interval;
+	unsigned long			multicast_membership_interval;
+	unsigned long			multicast_querier_interval;
+	unsigned long			multicast_query_interval;
+	unsigned long			multicast_query_response_interval;
+	unsigned long			multicast_startup_query_interval;
+
+	spinlock_t			multicast_lock;
+	struct net_bridge_mdb_htable __rcu *mdb;
+	struct hlist_head		router_list;
+
+	struct timer_list		multicast_router_timer;
+	struct bridge_mcast_other_query	ip4_other_query;
+	struct bridge_mcast_own_query	ip4_own_query;
+	struct bridge_mcast_querier	ip4_querier;
+#if IS_ENABLED(CONFIG_IPV6)
+	struct bridge_mcast_other_query	ip6_other_query;
+	struct bridge_mcast_own_query	ip6_own_query;
+	struct bridge_mcast_querier	ip6_querier;
+#endif /* IS_ENABLED(CONFIG_IPV6) */
+#endif
+
+	struct timer_list		hello_timer;
+	struct timer_list		tcn_timer;
+	struct timer_list		topology_change_timer;
+	struct timer_list		gc_timer;
+	struct kobject			*ifobj;
+	u32				auto_cnt;
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+	u8				vlan_enabled;
+	__be16				vlan_proto;
+	u16				default_pvid;
+	struct net_port_vlans __rcu	*vlan_info;
+#endif
+};
+
+struct br_input_skb_cb {
+	struct net_device *brdev;
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+	int igmp;
+	int mrouters_only;
+#endif
+
+	u16 frag_max_size;
+	bool proxyarp_replied;
+
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+	bool vlan_filtered;
+#endif
+};
+
+#define BR_INPUT_SKB_CB(__skb)	((struct br_input_skb_cb *)(__skb)->cb)
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(BR_INPUT_SKB_CB(__skb)->mrouters_only)
+#else
+# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(0)
+#endif
+
+#define br_printk(level, br, format, args...)	\
+	printk(level "%s: " format, (br)->dev->name, ##args)
+
+#define br_err(__br, format, args...)			\
+	br_printk(KERN_ERR, __br, format, ##args)
+#define br_warn(__br, format, args...)			\
+	br_printk(KERN_WARNING, __br, format, ##args)
+#define br_notice(__br, format, args...)		\
+	br_printk(KERN_NOTICE, __br, format, ##args)
+#define br_info(__br, format, args...)			\
+	br_printk(KERN_INFO, __br, format, ##args)
+
+#define br_debug(br, format, args...)			\
+	pr_debug("%s: " format,  (br)->dev->name, ##args)
+
+/* called under bridge lock */
+static inline int br_is_root_bridge(const struct net_bridge *br)
+{
+	return !memcmp(&br->bridge_id, &br->designated_root, 8);
+}
+
+/* br_device.c */
+void br_dev_setup(struct net_device *dev);
+void br_dev_delete(struct net_device *dev, struct list_head *list);
+netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
+				       struct sk_buff *skb)
+{
+	struct netpoll *np = p->np;
+
+	if (np)
+		netpoll_send_skb(np, skb);
+}
+
+int br_netpoll_enable(struct net_bridge_port *p);
+void br_netpoll_disable(struct net_bridge_port *p);
+#else
+static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
+				       struct sk_buff *skb)
+{
+}
+
+static inline int br_netpoll_enable(struct net_bridge_port *p)
+{
+	return 0;
+}
+
+static inline void br_netpoll_disable(struct net_bridge_port *p)
+{
+}
+#endif
+
+/* br_fdb.c */
+int br_fdb_init(void);
+void br_fdb_fini(void);
+void br_fdb_flush(struct net_bridge *br);
+void br_fdb_find_delete_local(struct net_bridge *br,
+			      const struct net_bridge_port *p,
+			      const unsigned char *addr, u16 vid);
+void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
+void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
+void br_fdb_cleanup(unsigned long arg);
+void br_fdb_delete_by_port(struct net_bridge *br,
+			   const struct net_bridge_port *p, int do_all);
+struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
+					  const unsigned char *addr, __u16 vid);
+int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
+int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
+		   unsigned long off);
+int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
+		  const unsigned char *addr, u16 vid);
+void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
+		   const unsigned char *addr, u16 vid, bool added_by_user);
+
+int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
+		  struct net_device *dev, const unsigned char *addr, u16 vid);
+int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
+	       const unsigned char *addr, u16 vid, u16 nlh_flags);
+int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
+		struct net_device *dev, struct net_device *fdev, int idx);
+int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
+void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
+int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
+			      const unsigned char *addr, u16 vid);
+int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
+			      const unsigned char *addr, u16 vid);
+
+/* br_forward.c */
+void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
+int br_dev_queue_push_xmit(struct sock *sk, struct sk_buff *skb);
+void br_forward(const struct net_bridge_port *to,
+		struct sk_buff *skb, struct sk_buff *skb0);
+int br_forward_finish(struct sock *sk, struct sk_buff *skb);
+void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
+void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
+		      struct sk_buff *skb2, bool unicast);
+
+/* br_if.c */
+void br_port_carrier_check(struct net_bridge_port *p);
+int br_add_bridge(struct net *net, const char *name);
+int br_del_bridge(struct net *net, const char *name);
+int br_add_if(struct net_bridge *br, struct net_device *dev);
+int br_del_if(struct net_bridge *br, struct net_device *dev);
+int br_min_mtu(const struct net_bridge *br);
+netdev_features_t br_features_recompute(struct net_bridge *br,
+					netdev_features_t features);
+void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
+void br_manage_promisc(struct net_bridge *br);
+
+/* br_input.c */
+int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb);
+rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
+
+static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
+{
+	return rcu_dereference(dev->rx_handler) == br_handle_frame;
+}
+
+static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
+{
+	return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
+}
+
+/* br_ioctl.c */
+int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
+			     void __user *arg);
+
+/* br_multicast.c */
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+extern unsigned int br_mdb_rehash_seq;
+int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
+		     struct sk_buff *skb, u16 vid);
+struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
+					struct sk_buff *skb, u16 vid);
+void br_multicast_add_port(struct net_bridge_port *port);
+void br_multicast_del_port(struct net_bridge_port *port);
+void br_multicast_enable_port(struct net_bridge_port *port);
+void br_multicast_disable_port(struct net_bridge_port *port);
+void br_multicast_init(struct net_bridge *br);
+void br_multicast_open(struct net_bridge *br);
+void br_multicast_stop(struct net_bridge *br);
+void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
+			  struct sk_buff *skb);
+void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
+			  struct sk_buff *skb, struct sk_buff *skb2);
+int br_multicast_set_router(struct net_bridge *br, unsigned long val);
+int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
+int br_multicast_toggle(struct net_bridge *br, unsigned long val);
+int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
+int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
+struct net_bridge_mdb_entry *
+br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
+struct net_bridge_mdb_entry *
+br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
+		       struct br_ip *group);
+void br_multicast_free_pg(struct rcu_head *head);
+struct net_bridge_port_group *
+br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
+			    struct net_bridge_port_group __rcu *next,
+			    unsigned char state);
+void br_mdb_init(void);
+void br_mdb_uninit(void);
+void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
+		   struct br_ip *group, int type);
+
+#define mlock_dereference(X, br) \
+	rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
+
+static inline bool br_multicast_is_router(struct net_bridge *br)
+{
+	return br->multicast_router == 2 ||
+	       (br->multicast_router == 1 &&
+		timer_pending(&br->multicast_router_timer));
+}
+
+static inline bool
+__br_multicast_querier_exists(struct net_bridge *br,
+			      struct bridge_mcast_other_query *querier)
+{
+	return time_is_before_jiffies(querier->delay_time) &&
+	       (br->multicast_querier || timer_pending(&querier->timer));
+}
+
+static inline bool br_multicast_querier_exists(struct net_bridge *br,
+					       struct ethhdr *eth)
+{
+	switch (eth->h_proto) {
+	case (htons(ETH_P_IP)):
+		return __br_multicast_querier_exists(br, &br->ip4_other_query);
+#if IS_ENABLED(CONFIG_IPV6)
+	case (htons(ETH_P_IPV6)):
+		return __br_multicast_querier_exists(br, &br->ip6_other_query);
+#endif
+	default:
+		return false;
+	}
+}
+#else
+static inline int br_multicast_rcv(struct net_bridge *br,
+				   struct net_bridge_port *port,
+				   struct sk_buff *skb,
+				   u16 vid)
+{
+	return 0;
+}
+
+static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
+						      struct sk_buff *skb, u16 vid)
+{
+	return NULL;
+}
+
+static inline void br_multicast_add_port(struct net_bridge_port *port)
+{
+}
+
+static inline void br_multicast_del_port(struct net_bridge_port *port)
+{
+}
+
+static inline void br_multicast_enable_port(struct net_bridge_port *port)
+{
+}
+
+static inline void br_multicast_disable_port(struct net_bridge_port *port)
+{
+}
+
+static inline void br_multicast_init(struct net_bridge *br)
+{
+}
+
+static inline void br_multicast_open(struct net_bridge *br)
+{
+}
+
+static inline void br_multicast_stop(struct net_bridge *br)
+{
+}
+
+static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
+					struct sk_buff *skb)
+{
+}
+
+static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
+					struct sk_buff *skb,
+					struct sk_buff *skb2)
+{
+}
+static inline bool br_multicast_is_router(struct net_bridge *br)
+{
+	return 0;
+}
+static inline bool br_multicast_querier_exists(struct net_bridge *br,
+					       struct ethhdr *eth)
+{
+	return false;
+}
+static inline void br_mdb_init(void)
+{
+}
+static inline void br_mdb_uninit(void)
+{
+}
+#endif
+
+/* br_vlan.c */
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
+			struct sk_buff *skb, u16 *vid);
+bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
+		       const struct sk_buff *skb);
+bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
+struct sk_buff *br_handle_vlan(struct net_bridge *br,
+			       const struct net_port_vlans *v,
+			       struct sk_buff *skb);
+int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
+int br_vlan_delete(struct net_bridge *br, u16 vid);
+void br_vlan_flush(struct net_bridge *br);
+bool br_vlan_find(struct net_bridge *br, u16 vid);
+void br_recalculate_fwd_mask(struct net_bridge *br);
+int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
+int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
+int br_vlan_init(struct net_bridge *br);
+int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
+int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
+int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
+void nbp_vlan_flush(struct net_bridge_port *port);
+bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
+int nbp_vlan_init(struct net_bridge_port *port);
+
+static inline struct net_port_vlans *br_get_vlan_info(
+						const struct net_bridge *br)
+{
+	return rcu_dereference_rtnl(br->vlan_info);
+}
+
+static inline struct net_port_vlans *nbp_get_vlan_info(
+						const struct net_bridge_port *p)
+{
+	return rcu_dereference_rtnl(p->vlan_info);
+}
+
+/* Since bridge now depends on 8021Q module, but the time bridge sees the
+ * skb, the vlan tag will always be present if the frame was tagged.
+ */
+static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
+{
+	int err = 0;
+
+	if (skb_vlan_tag_present(skb))
+		*vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
+	else {
+		*vid = 0;
+		err = -EINVAL;
+	}
+
+	return err;
+}
+
+static inline u16 br_get_pvid(const struct net_port_vlans *v)
+{
+	if (!v)
+		return 0;
+
+	smp_rmb();
+	return v->pvid;
+}
+
+static inline int br_vlan_enabled(struct net_bridge *br)
+{
+	return br->vlan_enabled;
+}
+#else
+static inline bool br_allowed_ingress(struct net_bridge *br,
+				      struct net_port_vlans *v,
+				      struct sk_buff *skb,
+				      u16 *vid)
+{
+	return true;
+}
+
+static inline bool br_allowed_egress(struct net_bridge *br,
+				     const struct net_port_vlans *v,
+				     const struct sk_buff *skb)
+{
+	return true;
+}
+
+static inline bool br_should_learn(struct net_bridge_port *p,
+				   struct sk_buff *skb, u16 *vid)
+{
+	return true;
+}
+
+static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
+					     const struct net_port_vlans *v,
+					     struct sk_buff *skb)
+{
+	return skb;
+}
+
+static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline void br_vlan_flush(struct net_bridge *br)
+{
+}
+
+static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
+{
+	return false;
+}
+
+static inline void br_recalculate_fwd_mask(struct net_bridge *br)
+{
+}
+
+static inline int br_vlan_init(struct net_bridge *br)
+{
+	return 0;
+}
+
+static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline void nbp_vlan_flush(struct net_bridge_port *port)
+{
+}
+
+static inline struct net_port_vlans *br_get_vlan_info(
+						const struct net_bridge *br)
+{
+	return NULL;
+}
+static inline struct net_port_vlans *nbp_get_vlan_info(
+						const struct net_bridge_port *p)
+{
+	return NULL;
+}
+
+static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
+{
+	return false;
+}
+
+static inline int nbp_vlan_init(struct net_bridge_port *port)
+{
+	return 0;
+}
+
+static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
+{
+	return 0;
+}
+static inline u16 br_get_pvid(const struct net_port_vlans *v)
+{
+	return 0;
+}
+
+static inline int br_vlan_enabled(struct net_bridge *br)
+{
+	return 0;
+}
+#endif
+
+struct nf_br_ops {
+	int (*br_dev_xmit_hook)(struct sk_buff *skb);
+};
+extern const struct nf_br_ops __rcu *nf_br_ops;
+
+/* br_netfilter.c */
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+int br_nf_core_init(void);
+void br_nf_core_fini(void);
+void br_netfilter_rtable_init(struct net_bridge *);
+#else
+static inline int br_nf_core_init(void) { return 0; }
+static inline void br_nf_core_fini(void) {}
+#define br_netfilter_rtable_init(x)
+#endif
+
+/* br_stp.c */
+void br_log_state(const struct net_bridge_port *p);
+void br_set_state(struct net_bridge_port *p, unsigned int state);
+struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
+void br_init_port(struct net_bridge_port *p);
+void br_become_designated_port(struct net_bridge_port *p);
+
+void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
+int br_set_forward_delay(struct net_bridge *br, unsigned long x);
+int br_set_hello_time(struct net_bridge *br, unsigned long x);
+int br_set_max_age(struct net_bridge *br, unsigned long x);
+
+
+/* br_stp_if.c */
+void br_stp_enable_bridge(struct net_bridge *br);
+void br_stp_disable_bridge(struct net_bridge *br);
+void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
+void br_stp_enable_port(struct net_bridge_port *p);
+void br_stp_disable_port(struct net_bridge_port *p);
+bool br_stp_recalculate_bridge_id(struct net_bridge *br);
+void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
+void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
+int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
+int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
+ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
+
+/* br_stp_bpdu.c */
+struct stp_proto;
+void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
+		struct net_device *dev);
+
+/* br_stp_timer.c */
+void br_stp_timer_init(struct net_bridge *br);
+void br_stp_port_timer_init(struct net_bridge_port *p);
+unsigned long br_timer_value(const struct timer_list *timer);
+
+/* br.c */
+#if IS_ENABLED(CONFIG_ATM_LANE)
+extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
+#endif
+
+/* br_netlink.c */
+extern struct rtnl_link_ops br_link_ops;
+int br_netlink_init(void);
+void br_netlink_fini(void);
+void br_ifinfo_notify(int event, struct net_bridge_port *port);
+int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
+int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
+int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
+	       u32 filter_mask, int nlflags);
+
+#ifdef CONFIG_SYSFS
+/* br_sysfs_if.c */
+extern const struct sysfs_ops brport_sysfs_ops;
+int br_sysfs_addif(struct net_bridge_port *p);
+int br_sysfs_renameif(struct net_bridge_port *p);
+
+/* br_sysfs_br.c */
+int br_sysfs_addbr(struct net_device *dev);
+void br_sysfs_delbr(struct net_device *dev);
+
+#else
+
+static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
+static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
+static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
+static inline void br_sysfs_delbr(struct net_device *dev) { return; }
+#endif /* CONFIG_SYSFS */
+
+#endif
diff --git a/kernel/net/bridge/br_private_stp.h b/kernel/net/bridge/br_private_stp.h
new file mode 100644
index 000000000..2fe910c4e
--- /dev/null
+++ b/kernel/net/bridge/br_private_stp.h
@@ -0,0 +1,69 @@
+/*
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _BR_PRIVATE_STP_H
+#define _BR_PRIVATE_STP_H
+
+#define BPDU_TYPE_CONFIG 0
+#define BPDU_TYPE_TCN 0x80
+
+/* IEEE 802.1D-1998 timer values */
+#define BR_MIN_HELLO_TIME	(1*HZ)
+#define BR_MAX_HELLO_TIME	(10*HZ)
+
+#define BR_MIN_FORWARD_DELAY	(2*HZ)
+#define BR_MAX_FORWARD_DELAY	(30*HZ)
+
+#define BR_MIN_MAX_AGE		(6*HZ)
+#define BR_MAX_MAX_AGE		(40*HZ)
+
+#define BR_MIN_PATH_COST	1
+#define BR_MAX_PATH_COST	65535
+
+struct br_config_bpdu {
+	unsigned int	topology_change:1;
+	unsigned int	topology_change_ack:1;
+	bridge_id	root;
+	int		root_path_cost;
+	bridge_id	bridge_id;
+	port_id		port_id;
+	int		message_age;
+	int		max_age;
+	int		hello_time;
+	int		forward_delay;
+};
+
+/* called under bridge lock */
+static inline int br_is_designated_port(const struct net_bridge_port *p)
+{
+	return !memcmp(&p->designated_bridge, &p->br->bridge_id, 8) &&
+		(p->designated_port == p->port_id);
+}
+
+
+/* br_stp.c */
+void br_become_root_bridge(struct net_bridge *br);
+void br_config_bpdu_generation(struct net_bridge *);
+void br_configuration_update(struct net_bridge *);
+void br_port_state_selection(struct net_bridge *);
+void br_received_config_bpdu(struct net_bridge_port *p,
+			     const struct br_config_bpdu *bpdu);
+void br_received_tcn_bpdu(struct net_bridge_port *p);
+void br_transmit_config(struct net_bridge_port *p);
+void br_transmit_tcn(struct net_bridge *br);
+void br_topology_change_detection(struct net_bridge *br);
+
+/* br_stp_bpdu.c */
+void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *);
+void br_send_tcn_bpdu(struct net_bridge_port *);
+
+#endif
diff --git a/kernel/net/bridge/br_stp.c b/kernel/net/bridge/br_stp.c
new file mode 100644
index 000000000..fb3ebe615
--- /dev/null
+++ b/kernel/net/bridge/br_stp.c
@@ -0,0 +1,582 @@
+/*
+ *	Spanning tree protocol; generic parts
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/rculist.h>
+#include <net/switchdev.h>
+
+#include "br_private.h"
+#include "br_private_stp.h"
+
+/* since time values in bpdu are in jiffies and then scaled (1/256)
+ * before sending, make sure that is at least one STP tick.
+ */
+#define MESSAGE_AGE_INCR	((HZ / 256) + 1)
+
+static const char *const br_port_state_names[] = {
+	[BR_STATE_DISABLED] = "disabled",
+	[BR_STATE_LISTENING] = "listening",
+	[BR_STATE_LEARNING] = "learning",
+	[BR_STATE_FORWARDING] = "forwarding",
+	[BR_STATE_BLOCKING] = "blocking",
+};
+
+void br_log_state(const struct net_bridge_port *p)
+{
+	br_info(p->br, "port %u(%s) entered %s state\n",
+		(unsigned int) p->port_no, p->dev->name,
+		br_port_state_names[p->state]);
+}
+
+void br_set_state(struct net_bridge_port *p, unsigned int state)
+{
+	int err;
+
+	p->state = state;
+	err = netdev_switch_port_stp_update(p->dev, state);
+	if (err && err != -EOPNOTSUPP)
+		br_warn(p->br, "error setting offload STP state on port %u(%s)\n",
+				(unsigned int) p->port_no, p->dev->name);
+}
+
+/* called under bridge lock */
+struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no)
+{
+	struct net_bridge_port *p;
+
+	list_for_each_entry_rcu(p, &br->port_list, list) {
+		if (p->port_no == port_no)
+			return p;
+	}
+
+	return NULL;
+}
+
+/* called under bridge lock */
+static int br_should_become_root_port(const struct net_bridge_port *p,
+				      u16 root_port)
+{
+	struct net_bridge *br;
+	struct net_bridge_port *rp;
+	int t;
+
+	br = p->br;
+	if (p->state == BR_STATE_DISABLED ||
+	    br_is_designated_port(p))
+		return 0;
+
+	if (memcmp(&br->bridge_id, &p->designated_root, 8) <= 0)
+		return 0;
+
+	if (!root_port)
+		return 1;
+
+	rp = br_get_port(br, root_port);
+
+	t = memcmp(&p->designated_root, &rp->designated_root, 8);
+	if (t < 0)
+		return 1;
+	else if (t > 0)
+		return 0;
+
+	if (p->designated_cost + p->path_cost <
+	    rp->designated_cost + rp->path_cost)
+		return 1;
+	else if (p->designated_cost + p->path_cost >
+		 rp->designated_cost + rp->path_cost)
+		return 0;
+
+	t = memcmp(&p->designated_bridge, &rp->designated_bridge, 8);
+	if (t < 0)
+		return 1;
+	else if (t > 0)
+		return 0;
+
+	if (p->designated_port < rp->designated_port)
+		return 1;
+	else if (p->designated_port > rp->designated_port)
+		return 0;
+
+	if (p->port_id < rp->port_id)
+		return 1;
+
+	return 0;
+}
+
+static void br_root_port_block(const struct net_bridge *br,
+			       struct net_bridge_port *p)
+{
+
+	br_notice(br, "port %u(%s) tried to become root port (blocked)",
+		  (unsigned int) p->port_no, p->dev->name);
+
+	br_set_state(p, BR_STATE_LISTENING);
+	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
+
+	if (br->forward_delay > 0)
+		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);
+}
+
+/* called under bridge lock */
+static void br_root_selection(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+	u16 root_port = 0;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (!br_should_become_root_port(p, root_port))
+			continue;
+
+		if (p->flags & BR_ROOT_BLOCK)
+			br_root_port_block(br, p);
+		else
+			root_port = p->port_no;
+	}
+
+	br->root_port = root_port;
+
+	if (!root_port) {
+		br->designated_root = br->bridge_id;
+		br->root_path_cost = 0;
+	} else {
+		p = br_get_port(br, root_port);
+		br->designated_root = p->designated_root;
+		br->root_path_cost = p->designated_cost + p->path_cost;
+	}
+}
+
+/* called under bridge lock */
+void br_become_root_bridge(struct net_bridge *br)
+{
+	br->max_age = br->bridge_max_age;
+	br->hello_time = br->bridge_hello_time;
+	br->forward_delay = br->bridge_forward_delay;
+	br_topology_change_detection(br);
+	del_timer(&br->tcn_timer);
+
+	if (br->dev->flags & IFF_UP) {
+		br_config_bpdu_generation(br);
+		mod_timer(&br->hello_timer, jiffies + br->hello_time);
+	}
+}
+
+/* called under bridge lock */
+void br_transmit_config(struct net_bridge_port *p)
+{
+	struct br_config_bpdu bpdu;
+	struct net_bridge *br;
+
+	if (timer_pending(&p->hold_timer)) {
+		p->config_pending = 1;
+		return;
+	}
+
+	br = p->br;
+
+	bpdu.topology_change = br->topology_change;
+	bpdu.topology_change_ack = p->topology_change_ack;
+	bpdu.root = br->designated_root;
+	bpdu.root_path_cost = br->root_path_cost;
+	bpdu.bridge_id = br->bridge_id;
+	bpdu.port_id = p->port_id;
+	if (br_is_root_bridge(br))
+		bpdu.message_age = 0;
+	else {
+		struct net_bridge_port *root
+			= br_get_port(br, br->root_port);
+		bpdu.message_age = (jiffies - root->designated_age)
+			+ MESSAGE_AGE_INCR;
+	}
+	bpdu.max_age = br->max_age;
+	bpdu.hello_time = br->hello_time;
+	bpdu.forward_delay = br->forward_delay;
+
+	if (bpdu.message_age < br->max_age) {
+		br_send_config_bpdu(p, &bpdu);
+		p->topology_change_ack = 0;
+		p->config_pending = 0;
+		mod_timer(&p->hold_timer,
+			  round_jiffies(jiffies + BR_HOLD_TIME));
+	}
+}
+
+/* called under bridge lock */
+static void br_record_config_information(struct net_bridge_port *p,
+					 const struct br_config_bpdu *bpdu)
+{
+	p->designated_root = bpdu->root;
+	p->designated_cost = bpdu->root_path_cost;
+	p->designated_bridge = bpdu->bridge_id;
+	p->designated_port = bpdu->port_id;
+	p->designated_age = jiffies - bpdu->message_age;
+
+	mod_timer(&p->message_age_timer, jiffies
+		  + (bpdu->max_age - bpdu->message_age));
+}
+
+/* called under bridge lock */
+static void br_record_config_timeout_values(struct net_bridge *br,
+					    const struct br_config_bpdu *bpdu)
+{
+	br->max_age = bpdu->max_age;
+	br->hello_time = bpdu->hello_time;
+	br->forward_delay = bpdu->forward_delay;
+	br->topology_change = bpdu->topology_change;
+}
+
+/* called under bridge lock */
+void br_transmit_tcn(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+
+	p = br_get_port(br, br->root_port);
+	if (p)
+		br_send_tcn_bpdu(p);
+	else
+		br_notice(br, "root port %u not found for topology notice\n",
+			  br->root_port);
+}
+
+/* called under bridge lock */
+static int br_should_become_designated_port(const struct net_bridge_port *p)
+{
+	struct net_bridge *br;
+	int t;
+
+	br = p->br;
+	if (br_is_designated_port(p))
+		return 1;
+
+	if (memcmp(&p->designated_root, &br->designated_root, 8))
+		return 1;
+
+	if (br->root_path_cost < p->designated_cost)
+		return 1;
+	else if (br->root_path_cost > p->designated_cost)
+		return 0;
+
+	t = memcmp(&br->bridge_id, &p->designated_bridge, 8);
+	if (t < 0)
+		return 1;
+	else if (t > 0)
+		return 0;
+
+	if (p->port_id < p->designated_port)
+		return 1;
+
+	return 0;
+}
+
+/* called under bridge lock */
+static void br_designated_port_selection(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (p->state != BR_STATE_DISABLED &&
+		    br_should_become_designated_port(p))
+			br_become_designated_port(p);
+
+	}
+}
+
+/* called under bridge lock */
+static int br_supersedes_port_info(const struct net_bridge_port *p,
+				   const struct br_config_bpdu *bpdu)
+{
+	int t;
+
+	t = memcmp(&bpdu->root, &p->designated_root, 8);
+	if (t < 0)
+		return 1;
+	else if (t > 0)
+		return 0;
+
+	if (bpdu->root_path_cost < p->designated_cost)
+		return 1;
+	else if (bpdu->root_path_cost > p->designated_cost)
+		return 0;
+
+	t = memcmp(&bpdu->bridge_id, &p->designated_bridge, 8);
+	if (t < 0)
+		return 1;
+	else if (t > 0)
+		return 0;
+
+	if (memcmp(&bpdu->bridge_id, &p->br->bridge_id, 8))
+		return 1;
+
+	if (bpdu->port_id <= p->designated_port)
+		return 1;
+
+	return 0;
+}
+
+/* called under bridge lock */
+static void br_topology_change_acknowledged(struct net_bridge *br)
+{
+	br->topology_change_detected = 0;
+	del_timer(&br->tcn_timer);
+}
+
+/* called under bridge lock */
+void br_topology_change_detection(struct net_bridge *br)
+{
+	int isroot = br_is_root_bridge(br);
+
+	if (br->stp_enabled != BR_KERNEL_STP)
+		return;
+
+	br_info(br, "topology change detected, %s\n",
+		isroot ? "propagating" : "sending tcn bpdu");
+
+	if (isroot) {
+		br->topology_change = 1;
+		mod_timer(&br->topology_change_timer, jiffies
+			  + br->bridge_forward_delay + br->bridge_max_age);
+	} else if (!br->topology_change_detected) {
+		br_transmit_tcn(br);
+		mod_timer(&br->tcn_timer, jiffies + br->bridge_hello_time);
+	}
+
+	br->topology_change_detected = 1;
+}
+
+/* called under bridge lock */
+void br_config_bpdu_generation(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (p->state != BR_STATE_DISABLED &&
+		    br_is_designated_port(p))
+			br_transmit_config(p);
+	}
+}
+
+/* called under bridge lock */
+static void br_reply(struct net_bridge_port *p)
+{
+	br_transmit_config(p);
+}
+
+/* called under bridge lock */
+void br_configuration_update(struct net_bridge *br)
+{
+	br_root_selection(br);
+	br_designated_port_selection(br);
+}
+
+/* called under bridge lock */
+void br_become_designated_port(struct net_bridge_port *p)
+{
+	struct net_bridge *br;
+
+	br = p->br;
+	p->designated_root = br->designated_root;
+	p->designated_cost = br->root_path_cost;
+	p->designated_bridge = br->bridge_id;
+	p->designated_port = p->port_id;
+}
+
+
+/* called under bridge lock */
+static void br_make_blocking(struct net_bridge_port *p)
+{
+	if (p->state != BR_STATE_DISABLED &&
+	    p->state != BR_STATE_BLOCKING) {
+		if (p->state == BR_STATE_FORWARDING ||
+		    p->state == BR_STATE_LEARNING)
+			br_topology_change_detection(p->br);
+
+		br_set_state(p, BR_STATE_BLOCKING);
+		br_log_state(p);
+		br_ifinfo_notify(RTM_NEWLINK, p);
+
+		del_timer(&p->forward_delay_timer);
+	}
+}
+
+/* called under bridge lock */
+static void br_make_forwarding(struct net_bridge_port *p)
+{
+	struct net_bridge *br = p->br;
+
+	if (p->state != BR_STATE_BLOCKING)
+		return;
+
+	if (br->stp_enabled == BR_NO_STP || br->forward_delay == 0) {
+		br_set_state(p, BR_STATE_FORWARDING);
+		br_topology_change_detection(br);
+		del_timer(&p->forward_delay_timer);
+	} else if (br->stp_enabled == BR_KERNEL_STP)
+		br_set_state(p, BR_STATE_LISTENING);
+	else
+		br_set_state(p, BR_STATE_LEARNING);
+
+	br_multicast_enable_port(p);
+	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
+
+	if (br->forward_delay != 0)
+		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);
+}
+
+/* called under bridge lock */
+void br_port_state_selection(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+	unsigned int liveports = 0;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (p->state == BR_STATE_DISABLED)
+			continue;
+
+		/* Don't change port states if userspace is handling STP */
+		if (br->stp_enabled != BR_USER_STP) {
+			if (p->port_no == br->root_port) {
+				p->config_pending = 0;
+				p->topology_change_ack = 0;
+				br_make_forwarding(p);
+			} else if (br_is_designated_port(p)) {
+				del_timer(&p->message_age_timer);
+				br_make_forwarding(p);
+			} else {
+				p->config_pending = 0;
+				p->topology_change_ack = 0;
+				br_make_blocking(p);
+			}
+		}
+
+		if (p->state == BR_STATE_FORWARDING)
+			++liveports;
+	}
+
+	if (liveports == 0)
+		netif_carrier_off(br->dev);
+	else
+		netif_carrier_on(br->dev);
+}
+
+/* called under bridge lock */
+static void br_topology_change_acknowledge(struct net_bridge_port *p)
+{
+	p->topology_change_ack = 1;
+	br_transmit_config(p);
+}
+
+/* called under bridge lock */
+void br_received_config_bpdu(struct net_bridge_port *p,
+			     const struct br_config_bpdu *bpdu)
+{
+	struct net_bridge *br;
+	int was_root;
+
+	br = p->br;
+	was_root = br_is_root_bridge(br);
+
+	if (br_supersedes_port_info(p, bpdu)) {
+		br_record_config_information(p, bpdu);
+		br_configuration_update(br);
+		br_port_state_selection(br);
+
+		if (!br_is_root_bridge(br) && was_root) {
+			del_timer(&br->hello_timer);
+			if (br->topology_change_detected) {
+				del_timer(&br->topology_change_timer);
+				br_transmit_tcn(br);
+
+				mod_timer(&br->tcn_timer,
+					  jiffies + br->bridge_hello_time);
+			}
+		}
+
+		if (p->port_no == br->root_port) {
+			br_record_config_timeout_values(br, bpdu);
+			br_config_bpdu_generation(br);
+			if (bpdu->topology_change_ack)
+				br_topology_change_acknowledged(br);
+		}
+	} else if (br_is_designated_port(p)) {
+		br_reply(p);
+	}
+}
+
+/* called under bridge lock */
+void br_received_tcn_bpdu(struct net_bridge_port *p)
+{
+	if (br_is_designated_port(p)) {
+		br_info(p->br, "port %u(%s) received tcn bpdu\n",
+			(unsigned int) p->port_no, p->dev->name);
+
+		br_topology_change_detection(p->br);
+		br_topology_change_acknowledge(p);
+	}
+}
+
+/* Change bridge STP parameter */
+int br_set_hello_time(struct net_bridge *br, unsigned long val)
+{
+	unsigned long t = clock_t_to_jiffies(val);
+
+	if (t < BR_MIN_HELLO_TIME || t > BR_MAX_HELLO_TIME)
+		return -ERANGE;
+
+	spin_lock_bh(&br->lock);
+	br->bridge_hello_time = t;
+	if (br_is_root_bridge(br))
+		br->hello_time = br->bridge_hello_time;
+	spin_unlock_bh(&br->lock);
+	return 0;
+}
+
+int br_set_max_age(struct net_bridge *br, unsigned long val)
+{
+	unsigned long t = clock_t_to_jiffies(val);
+
+	if (t < BR_MIN_MAX_AGE || t > BR_MAX_MAX_AGE)
+		return -ERANGE;
+
+	spin_lock_bh(&br->lock);
+	br->bridge_max_age = t;
+	if (br_is_root_bridge(br))
+		br->max_age = br->bridge_max_age;
+	spin_unlock_bh(&br->lock);
+	return 0;
+
+}
+
+void __br_set_forward_delay(struct net_bridge *br, unsigned long t)
+{
+	br->bridge_forward_delay = t;
+	if (br_is_root_bridge(br))
+		br->forward_delay = br->bridge_forward_delay;
+}
+
+int br_set_forward_delay(struct net_bridge *br, unsigned long val)
+{
+	unsigned long t = clock_t_to_jiffies(val);
+	int err = -ERANGE;
+
+	spin_lock_bh(&br->lock);
+	if (br->stp_enabled != BR_NO_STP &&
+	    (t < BR_MIN_FORWARD_DELAY || t > BR_MAX_FORWARD_DELAY))
+		goto unlock;
+
+	__br_set_forward_delay(br, t);
+	err = 0;
+
+unlock:
+	spin_unlock_bh(&br->lock);
+	return err;
+}
diff --git a/kernel/net/bridge/br_stp_bpdu.c b/kernel/net/bridge/br_stp_bpdu.c
new file mode 100644
index 000000000..534fc4cd2
--- /dev/null
+++ b/kernel/net/bridge/br_stp_bpdu.c
@@ -0,0 +1,242 @@
+/*
+ *	Spanning tree protocol; BPDU handling
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/etherdevice.h>
+#include <linux/llc.h>
+#include <linux/slab.h>
+#include <linux/pkt_sched.h>
+#include <net/net_namespace.h>
+#include <net/llc.h>
+#include <net/llc_pdu.h>
+#include <net/stp.h>
+#include <asm/unaligned.h>
+
+#include "br_private.h"
+#include "br_private_stp.h"
+
+#define STP_HZ		256
+
+#define LLC_RESERVE sizeof(struct llc_pdu_un)
+
+static void br_send_bpdu(struct net_bridge_port *p,
+			 const unsigned char *data, int length)
+{
+	struct sk_buff *skb;
+
+	skb = dev_alloc_skb(length+LLC_RESERVE);
+	if (!skb)
+		return;
+
+	skb->dev = p->dev;
+	skb->protocol = htons(ETH_P_802_2);
+	skb->priority = TC_PRIO_CONTROL;
+
+	skb_reserve(skb, LLC_RESERVE);
+	memcpy(__skb_put(skb, length), data, length);
+
+	llc_pdu_header_init(skb, LLC_PDU_TYPE_U, LLC_SAP_BSPAN,
+			    LLC_SAP_BSPAN, LLC_PDU_CMD);
+	llc_pdu_init_as_ui_cmd(skb);
+
+	llc_mac_hdr_init(skb, p->dev->dev_addr, p->br->group_addr);
+
+	skb_reset_mac_header(skb);
+
+	NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, NULL, skb,
+		NULL, skb->dev,
+		dev_queue_xmit_sk);
+}
+
+static inline void br_set_ticks(unsigned char *dest, int j)
+{
+	unsigned long ticks = (STP_HZ * j)/ HZ;
+
+	put_unaligned_be16(ticks, dest);
+}
+
+static inline int br_get_ticks(const unsigned char *src)
+{
+	unsigned long ticks = get_unaligned_be16(src);
+
+	return DIV_ROUND_UP(ticks * HZ, STP_HZ);
+}
+
+/* called under bridge lock */
+void br_send_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu)
+{
+	unsigned char buf[35];
+
+	if (p->br->stp_enabled != BR_KERNEL_STP)
+		return;
+
+	buf[0] = 0;
+	buf[1] = 0;
+	buf[2] = 0;
+	buf[3] = BPDU_TYPE_CONFIG;
+	buf[4] = (bpdu->topology_change ? 0x01 : 0) |
+		(bpdu->topology_change_ack ? 0x80 : 0);
+	buf[5] = bpdu->root.prio[0];
+	buf[6] = bpdu->root.prio[1];
+	buf[7] = bpdu->root.addr[0];
+	buf[8] = bpdu->root.addr[1];
+	buf[9] = bpdu->root.addr[2];
+	buf[10] = bpdu->root.addr[3];
+	buf[11] = bpdu->root.addr[4];
+	buf[12] = bpdu->root.addr[5];
+	buf[13] = (bpdu->root_path_cost >> 24) & 0xFF;
+	buf[14] = (bpdu->root_path_cost >> 16) & 0xFF;
+	buf[15] = (bpdu->root_path_cost >> 8) & 0xFF;
+	buf[16] = bpdu->root_path_cost & 0xFF;
+	buf[17] = bpdu->bridge_id.prio[0];
+	buf[18] = bpdu->bridge_id.prio[1];
+	buf[19] = bpdu->bridge_id.addr[0];
+	buf[20] = bpdu->bridge_id.addr[1];
+	buf[21] = bpdu->bridge_id.addr[2];
+	buf[22] = bpdu->bridge_id.addr[3];
+	buf[23] = bpdu->bridge_id.addr[4];
+	buf[24] = bpdu->bridge_id.addr[5];
+	buf[25] = (bpdu->port_id >> 8) & 0xFF;
+	buf[26] = bpdu->port_id & 0xFF;
+
+	br_set_ticks(buf+27, bpdu->message_age);
+	br_set_ticks(buf+29, bpdu->max_age);
+	br_set_ticks(buf+31, bpdu->hello_time);
+	br_set_ticks(buf+33, bpdu->forward_delay);
+
+	br_send_bpdu(p, buf, 35);
+}
+
+/* called under bridge lock */
+void br_send_tcn_bpdu(struct net_bridge_port *p)
+{
+	unsigned char buf[4];
+
+	if (p->br->stp_enabled != BR_KERNEL_STP)
+		return;
+
+	buf[0] = 0;
+	buf[1] = 0;
+	buf[2] = 0;
+	buf[3] = BPDU_TYPE_TCN;
+	br_send_bpdu(p, buf, 4);
+}
+
+/*
+ * Called from llc.
+ *
+ * NO locks, but rcu_read_lock
+ */
+void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
+		struct net_device *dev)
+{
+	const unsigned char *dest = eth_hdr(skb)->h_dest;
+	struct net_bridge_port *p;
+	struct net_bridge *br;
+	const unsigned char *buf;
+
+	if (!pskb_may_pull(skb, 4))
+		goto err;
+
+	/* compare of protocol id and version */
+	buf = skb->data;
+	if (buf[0] != 0 || buf[1] != 0 || buf[2] != 0)
+		goto err;
+
+	p = br_port_get_check_rcu(dev);
+	if (!p)
+		goto err;
+
+	br = p->br;
+	spin_lock(&br->lock);
+
+	if (br->stp_enabled != BR_KERNEL_STP)
+		goto out;
+
+	if (!(br->dev->flags & IFF_UP))
+		goto out;
+
+	if (p->state == BR_STATE_DISABLED)
+		goto out;
+
+	if (!ether_addr_equal(dest, br->group_addr))
+		goto out;
+
+	if (p->flags & BR_BPDU_GUARD) {
+		br_notice(br, "BPDU received on blocked port %u(%s)\n",
+			  (unsigned int) p->port_no, p->dev->name);
+		br_stp_disable_port(p);
+		goto out;
+	}
+
+	buf = skb_pull(skb, 3);
+
+	if (buf[0] == BPDU_TYPE_CONFIG) {
+		struct br_config_bpdu bpdu;
+
+		if (!pskb_may_pull(skb, 32))
+			goto out;
+
+		buf = skb->data;
+		bpdu.topology_change = (buf[1] & 0x01) ? 1 : 0;
+		bpdu.topology_change_ack = (buf[1] & 0x80) ? 1 : 0;
+
+		bpdu.root.prio[0] = buf[2];
+		bpdu.root.prio[1] = buf[3];
+		bpdu.root.addr[0] = buf[4];
+		bpdu.root.addr[1] = buf[5];
+		bpdu.root.addr[2] = buf[6];
+		bpdu.root.addr[3] = buf[7];
+		bpdu.root.addr[4] = buf[8];
+		bpdu.root.addr[5] = buf[9];
+		bpdu.root_path_cost =
+			(buf[10] << 24) |
+			(buf[11] << 16) |
+			(buf[12] << 8) |
+			buf[13];
+		bpdu.bridge_id.prio[0] = buf[14];
+		bpdu.bridge_id.prio[1] = buf[15];
+		bpdu.bridge_id.addr[0] = buf[16];
+		bpdu.bridge_id.addr[1] = buf[17];
+		bpdu.bridge_id.addr[2] = buf[18];
+		bpdu.bridge_id.addr[3] = buf[19];
+		bpdu.bridge_id.addr[4] = buf[20];
+		bpdu.bridge_id.addr[5] = buf[21];
+		bpdu.port_id = (buf[22] << 8) | buf[23];
+
+		bpdu.message_age = br_get_ticks(buf+24);
+		bpdu.max_age = br_get_ticks(buf+26);
+		bpdu.hello_time = br_get_ticks(buf+28);
+		bpdu.forward_delay = br_get_ticks(buf+30);
+
+		if (bpdu.message_age > bpdu.max_age) {
+			if (net_ratelimit())
+				br_notice(p->br,
+					  "port %u config from %pM"
+					  " (message_age %ul > max_age %ul)\n",
+					  p->port_no,
+					  eth_hdr(skb)->h_source,
+					  bpdu.message_age, bpdu.max_age);
+			goto out;
+		}
+
+		br_received_config_bpdu(p, &bpdu);
+	} else if (buf[0] == BPDU_TYPE_TCN) {
+		br_received_tcn_bpdu(p);
+	}
+ out:
+	spin_unlock(&br->lock);
+ err:
+	kfree_skb(skb);
+}
diff --git a/kernel/net/bridge/br_stp_if.c b/kernel/net/bridge/br_stp_if.c
new file mode 100644
index 000000000..7832d07f4
--- /dev/null
+++ b/kernel/net/bridge/br_stp_if.c
@@ -0,0 +1,316 @@
+/*
+ *	Spanning tree protocol; interface code
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/kmod.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+
+#include "br_private.h"
+#include "br_private_stp.h"
+
+
+/* Port id is composed of priority and port number.
+ * NB: some bits of priority are dropped to
+ *     make room for more ports.
+ */
+static inline port_id br_make_port_id(__u8 priority, __u16 port_no)
+{
+	return ((u16)priority << BR_PORT_BITS)
+		| (port_no & ((1<<BR_PORT_BITS)-1));
+}
+
+#define BR_MAX_PORT_PRIORITY ((u16)~0 >> BR_PORT_BITS)
+
+/* called under bridge lock */
+void br_init_port(struct net_bridge_port *p)
+{
+	p->port_id = br_make_port_id(p->priority, p->port_no);
+	br_become_designated_port(p);
+	br_set_state(p, BR_STATE_BLOCKING);
+	p->topology_change_ack = 0;
+	p->config_pending = 0;
+}
+
+/* called under bridge lock */
+void br_stp_enable_bridge(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+
+	spin_lock_bh(&br->lock);
+	mod_timer(&br->hello_timer, jiffies + br->hello_time);
+	mod_timer(&br->gc_timer, jiffies + HZ/10);
+
+	br_config_bpdu_generation(br);
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (netif_running(p->dev) && netif_oper_up(p->dev))
+			br_stp_enable_port(p);
+
+	}
+	spin_unlock_bh(&br->lock);
+}
+
+/* NO locks held */
+void br_stp_disable_bridge(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+
+	spin_lock_bh(&br->lock);
+	list_for_each_entry(p, &br->port_list, list) {
+		if (p->state != BR_STATE_DISABLED)
+			br_stp_disable_port(p);
+
+	}
+
+	br->topology_change = 0;
+	br->topology_change_detected = 0;
+	spin_unlock_bh(&br->lock);
+
+	del_timer_sync(&br->hello_timer);
+	del_timer_sync(&br->topology_change_timer);
+	del_timer_sync(&br->tcn_timer);
+	del_timer_sync(&br->gc_timer);
+}
+
+/* called under bridge lock */
+void br_stp_enable_port(struct net_bridge_port *p)
+{
+	br_init_port(p);
+	br_port_state_selection(p->br);
+	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
+}
+
+/* called under bridge lock */
+void br_stp_disable_port(struct net_bridge_port *p)
+{
+	struct net_bridge *br = p->br;
+	int wasroot;
+
+	wasroot = br_is_root_bridge(br);
+	br_become_designated_port(p);
+	br_set_state(p, BR_STATE_DISABLED);
+	p->topology_change_ack = 0;
+	p->config_pending = 0;
+
+	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
+
+	del_timer(&p->message_age_timer);
+	del_timer(&p->forward_delay_timer);
+	del_timer(&p->hold_timer);
+
+	br_fdb_delete_by_port(br, p, 0);
+	br_multicast_disable_port(p);
+
+	br_configuration_update(br);
+
+	br_port_state_selection(br);
+
+	if (br_is_root_bridge(br) && !wasroot)
+		br_become_root_bridge(br);
+}
+
+static void br_stp_start(struct net_bridge *br)
+{
+	int r;
+	char *argv[] = { BR_STP_PROG, br->dev->name, "start", NULL };
+	char *envp[] = { NULL };
+
+	r = call_usermodehelper(BR_STP_PROG, argv, envp, UMH_WAIT_PROC);
+
+	spin_lock_bh(&br->lock);
+
+	if (br->bridge_forward_delay < BR_MIN_FORWARD_DELAY)
+		__br_set_forward_delay(br, BR_MIN_FORWARD_DELAY);
+	else if (br->bridge_forward_delay > BR_MAX_FORWARD_DELAY)
+		__br_set_forward_delay(br, BR_MAX_FORWARD_DELAY);
+
+	if (r == 0) {
+		br->stp_enabled = BR_USER_STP;
+		br_debug(br, "userspace STP started\n");
+	} else {
+		br->stp_enabled = BR_KERNEL_STP;
+		br_debug(br, "using kernel STP\n");
+
+		/* To start timers on any ports left in blocking */
+		br_port_state_selection(br);
+	}
+
+	spin_unlock_bh(&br->lock);
+}
+
+static void br_stp_stop(struct net_bridge *br)
+{
+	int r;
+	char *argv[] = { BR_STP_PROG, br->dev->name, "stop", NULL };
+	char *envp[] = { NULL };
+
+	if (br->stp_enabled == BR_USER_STP) {
+		r = call_usermodehelper(BR_STP_PROG, argv, envp, UMH_WAIT_PROC);
+		br_info(br, "userspace STP stopped, return code %d\n", r);
+
+		/* To start timers on any ports left in blocking */
+		spin_lock_bh(&br->lock);
+		br_port_state_selection(br);
+		spin_unlock_bh(&br->lock);
+	}
+
+	br->stp_enabled = BR_NO_STP;
+}
+
+void br_stp_set_enabled(struct net_bridge *br, unsigned long val)
+{
+	ASSERT_RTNL();
+
+	if (val) {
+		if (br->stp_enabled == BR_NO_STP)
+			br_stp_start(br);
+	} else {
+		if (br->stp_enabled != BR_NO_STP)
+			br_stp_stop(br);
+	}
+}
+
+/* called under bridge lock */
+void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *addr)
+{
+	/* should be aligned on 2 bytes for ether_addr_equal() */
+	unsigned short oldaddr_aligned[ETH_ALEN >> 1];
+	unsigned char *oldaddr = (unsigned char *)oldaddr_aligned;
+	struct net_bridge_port *p;
+	int wasroot;
+
+	wasroot = br_is_root_bridge(br);
+
+	br_fdb_change_mac_address(br, addr);
+
+	memcpy(oldaddr, br->bridge_id.addr, ETH_ALEN);
+	memcpy(br->bridge_id.addr, addr, ETH_ALEN);
+	memcpy(br->dev->dev_addr, addr, ETH_ALEN);
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (ether_addr_equal(p->designated_bridge.addr, oldaddr))
+			memcpy(p->designated_bridge.addr, addr, ETH_ALEN);
+
+		if (ether_addr_equal(p->designated_root.addr, oldaddr))
+			memcpy(p->designated_root.addr, addr, ETH_ALEN);
+	}
+
+	br_configuration_update(br);
+	br_port_state_selection(br);
+	if (br_is_root_bridge(br) && !wasroot)
+		br_become_root_bridge(br);
+}
+
+/* should be aligned on 2 bytes for ether_addr_equal() */
+static const unsigned short br_mac_zero_aligned[ETH_ALEN >> 1];
+
+/* called under bridge lock */
+bool br_stp_recalculate_bridge_id(struct net_bridge *br)
+{
+	const unsigned char *br_mac_zero =
+			(const unsigned char *)br_mac_zero_aligned;
+	const unsigned char *addr = br_mac_zero;
+	struct net_bridge_port *p;
+
+	/* user has chosen a value so keep it */
+	if (br->dev->addr_assign_type == NET_ADDR_SET)
+		return false;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (addr == br_mac_zero ||
+		    memcmp(p->dev->dev_addr, addr, ETH_ALEN) < 0)
+			addr = p->dev->dev_addr;
+
+	}
+
+	if (ether_addr_equal(br->bridge_id.addr, addr))
+		return false;	/* no change */
+
+	br_stp_change_bridge_id(br, addr);
+	return true;
+}
+
+/* Acquires and releases bridge lock */
+void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio)
+{
+	struct net_bridge_port *p;
+	int wasroot;
+
+	spin_lock_bh(&br->lock);
+	wasroot = br_is_root_bridge(br);
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (p->state != BR_STATE_DISABLED &&
+		    br_is_designated_port(p)) {
+			p->designated_bridge.prio[0] = (newprio >> 8) & 0xFF;
+			p->designated_bridge.prio[1] = newprio & 0xFF;
+		}
+
+	}
+
+	br->bridge_id.prio[0] = (newprio >> 8) & 0xFF;
+	br->bridge_id.prio[1] = newprio & 0xFF;
+	br_configuration_update(br);
+	br_port_state_selection(br);
+	if (br_is_root_bridge(br) && !wasroot)
+		br_become_root_bridge(br);
+	spin_unlock_bh(&br->lock);
+}
+
+/* called under bridge lock */
+int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio)
+{
+	port_id new_port_id;
+
+	if (newprio > BR_MAX_PORT_PRIORITY)
+		return -ERANGE;
+
+	new_port_id = br_make_port_id(newprio, p->port_no);
+	if (br_is_designated_port(p))
+		p->designated_port = new_port_id;
+
+	p->port_id = new_port_id;
+	p->priority = newprio;
+	if (!memcmp(&p->br->bridge_id, &p->designated_bridge, 8) &&
+	    p->port_id < p->designated_port) {
+		br_become_designated_port(p);
+		br_port_state_selection(p->br);
+	}
+
+	return 0;
+}
+
+/* called under bridge lock */
+int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost)
+{
+	if (path_cost < BR_MIN_PATH_COST ||
+	    path_cost > BR_MAX_PATH_COST)
+		return -ERANGE;
+
+	p->flags |= BR_ADMIN_COST;
+	p->path_cost = path_cost;
+	br_configuration_update(p->br);
+	br_port_state_selection(p->br);
+	return 0;
+}
+
+ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id)
+{
+	return sprintf(buf, "%.2x%.2x.%.2x%.2x%.2x%.2x%.2x%.2x\n",
+	       id->prio[0], id->prio[1],
+	       id->addr[0], id->addr[1], id->addr[2],
+	       id->addr[3], id->addr[4], id->addr[5]);
+}
diff --git a/kernel/net/bridge/br_stp_timer.c b/kernel/net/bridge/br_stp_timer.c
new file mode 100644
index 000000000..7caf7fae2
--- /dev/null
+++ b/kernel/net/bridge/br_stp_timer.c
@@ -0,0 +1,176 @@
+/*
+ *	Spanning tree protocol; timer-related code
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Lennert Buytenhek		<buytenh@gnu.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/times.h>
+
+#include "br_private.h"
+#include "br_private_stp.h"
+
+/* called under bridge lock */
+static int br_is_designated_for_some_port(const struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (p->state != BR_STATE_DISABLED &&
+		    !memcmp(&p->designated_bridge, &br->bridge_id, 8))
+			return 1;
+	}
+
+	return 0;
+}
+
+static void br_hello_timer_expired(unsigned long arg)
+{
+	struct net_bridge *br = (struct net_bridge *)arg;
+
+	br_debug(br, "hello timer expired\n");
+	spin_lock(&br->lock);
+	if (br->dev->flags & IFF_UP) {
+		br_config_bpdu_generation(br);
+
+		mod_timer(&br->hello_timer, round_jiffies(jiffies + br->hello_time));
+	}
+	spin_unlock(&br->lock);
+}
+
+static void br_message_age_timer_expired(unsigned long arg)
+{
+	struct net_bridge_port *p = (struct net_bridge_port *) arg;
+	struct net_bridge *br = p->br;
+	const bridge_id *id = &p->designated_bridge;
+	int was_root;
+
+	if (p->state == BR_STATE_DISABLED)
+		return;
+
+	br_info(br, "port %u(%s) neighbor %.2x%.2x.%pM lost\n",
+		(unsigned int) p->port_no, p->dev->name,
+		id->prio[0], id->prio[1], &id->addr);
+
+	/*
+	 * According to the spec, the message age timer cannot be
+	 * running when we are the root bridge. So..  this was_root
+	 * check is redundant. I'm leaving it in for now, though.
+	 */
+	spin_lock(&br->lock);
+	if (p->state == BR_STATE_DISABLED)
+		goto unlock;
+	was_root = br_is_root_bridge(br);
+
+	br_become_designated_port(p);
+	br_configuration_update(br);
+	br_port_state_selection(br);
+	if (br_is_root_bridge(br) && !was_root)
+		br_become_root_bridge(br);
+ unlock:
+	spin_unlock(&br->lock);
+}
+
+static void br_forward_delay_timer_expired(unsigned long arg)
+{
+	struct net_bridge_port *p = (struct net_bridge_port *) arg;
+	struct net_bridge *br = p->br;
+
+	br_debug(br, "port %u(%s) forward delay timer\n",
+		 (unsigned int) p->port_no, p->dev->name);
+	spin_lock(&br->lock);
+	if (p->state == BR_STATE_LISTENING) {
+		br_set_state(p, BR_STATE_LEARNING);
+		mod_timer(&p->forward_delay_timer,
+			  jiffies + br->forward_delay);
+	} else if (p->state == BR_STATE_LEARNING) {
+		br_set_state(p, BR_STATE_FORWARDING);
+		if (br_is_designated_for_some_port(br))
+			br_topology_change_detection(br);
+		netif_carrier_on(br->dev);
+	}
+	br_log_state(p);
+	rcu_read_lock();
+	br_ifinfo_notify(RTM_NEWLINK, p);
+	rcu_read_unlock();
+	spin_unlock(&br->lock);
+}
+
+static void br_tcn_timer_expired(unsigned long arg)
+{
+	struct net_bridge *br = (struct net_bridge *) arg;
+
+	br_debug(br, "tcn timer expired\n");
+	spin_lock(&br->lock);
+	if (!br_is_root_bridge(br) && (br->dev->flags & IFF_UP)) {
+		br_transmit_tcn(br);
+
+		mod_timer(&br->tcn_timer, jiffies + br->bridge_hello_time);
+	}
+	spin_unlock(&br->lock);
+}
+
+static void br_topology_change_timer_expired(unsigned long arg)
+{
+	struct net_bridge *br = (struct net_bridge *) arg;
+
+	br_debug(br, "topo change timer expired\n");
+	spin_lock(&br->lock);
+	br->topology_change_detected = 0;
+	br->topology_change = 0;
+	spin_unlock(&br->lock);
+}
+
+static void br_hold_timer_expired(unsigned long arg)
+{
+	struct net_bridge_port *p = (struct net_bridge_port *) arg;
+
+	br_debug(p->br, "port %u(%s) hold timer expired\n",
+		 (unsigned int) p->port_no, p->dev->name);
+
+	spin_lock(&p->br->lock);
+	if (p->config_pending)
+		br_transmit_config(p);
+	spin_unlock(&p->br->lock);
+}
+
+void br_stp_timer_init(struct net_bridge *br)
+{
+	setup_timer(&br->hello_timer, br_hello_timer_expired,
+		      (unsigned long) br);
+
+	setup_timer(&br->tcn_timer, br_tcn_timer_expired,
+		      (unsigned long) br);
+
+	setup_timer(&br->topology_change_timer,
+		      br_topology_change_timer_expired,
+		      (unsigned long) br);
+
+	setup_timer(&br->gc_timer, br_fdb_cleanup, (unsigned long) br);
+}
+
+void br_stp_port_timer_init(struct net_bridge_port *p)
+{
+	setup_timer(&p->message_age_timer, br_message_age_timer_expired,
+		      (unsigned long) p);
+
+	setup_timer(&p->forward_delay_timer, br_forward_delay_timer_expired,
+		      (unsigned long) p);
+
+	setup_timer(&p->hold_timer, br_hold_timer_expired,
+		      (unsigned long) p);
+}
+
+/* Report ticks left (in USER_HZ) used for API */
+unsigned long br_timer_value(const struct timer_list *timer)
+{
+	return timer_pending(timer)
+		? jiffies_delta_to_clock_t(timer->expires - jiffies) : 0;
+}
diff --git a/kernel/net/bridge/br_sysfs_br.c b/kernel/net/bridge/br_sysfs_br.c
new file mode 100644
index 000000000..4c97fc50f
--- /dev/null
+++ b/kernel/net/bridge/br_sysfs_br.c
@@ -0,0 +1,889 @@
+/*
+ *	Sysfs attributes of bridge
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Stephen Hemminger		<shemminger@osdl.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/rtnetlink.h>
+#include <linux/spinlock.h>
+#include <linux/times.h>
+
+#include "br_private.h"
+
+#define to_dev(obj)	container_of(obj, struct device, kobj)
+#define to_bridge(cd)	((struct net_bridge *)netdev_priv(to_net_dev(cd)))
+
+/*
+ * Common code for storing bridge parameters.
+ */
+static ssize_t store_bridge_parm(struct device *d,
+				 const char *buf, size_t len,
+				 int (*set)(struct net_bridge *, unsigned long))
+{
+	struct net_bridge *br = to_bridge(d);
+	char *endp;
+	unsigned long val;
+	int err;
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+
+	err = (*set)(br, val);
+	return err ? err : len;
+}
+
+
+static ssize_t forward_delay_show(struct device *d,
+				  struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
+}
+
+static ssize_t forward_delay_store(struct device *d,
+				   struct device_attribute *attr,
+				   const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_set_forward_delay);
+}
+static DEVICE_ATTR_RW(forward_delay);
+
+static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
+			       char *buf)
+{
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(to_bridge(d)->hello_time));
+}
+
+static ssize_t hello_time_store(struct device *d,
+				struct device_attribute *attr, const char *buf,
+				size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_set_hello_time);
+}
+static DEVICE_ATTR_RW(hello_time);
+
+static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
+			    char *buf)
+{
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(to_bridge(d)->max_age));
+}
+
+static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
+			     const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_set_max_age);
+}
+static DEVICE_ATTR_RW(max_age);
+
+static ssize_t ageing_time_show(struct device *d,
+				struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
+}
+
+static int set_ageing_time(struct net_bridge *br, unsigned long val)
+{
+	br->ageing_time = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t ageing_time_store(struct device *d,
+				 struct device_attribute *attr,
+				 const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_ageing_time);
+}
+static DEVICE_ATTR_RW(ageing_time);
+
+static ssize_t stp_state_show(struct device *d,
+			      struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->stp_enabled);
+}
+
+
+static ssize_t stp_state_store(struct device *d,
+			       struct device_attribute *attr, const char *buf,
+			       size_t len)
+{
+	struct net_bridge *br = to_bridge(d);
+	char *endp;
+	unsigned long val;
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+	br_stp_set_enabled(br, val);
+	rtnl_unlock();
+
+	return len;
+}
+static DEVICE_ATTR_RW(stp_state);
+
+static ssize_t group_fwd_mask_show(struct device *d,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%#x\n", br->group_fwd_mask);
+}
+
+
+static ssize_t group_fwd_mask_store(struct device *d,
+				    struct device_attribute *attr,
+				    const char *buf,
+				    size_t len)
+{
+	struct net_bridge *br = to_bridge(d);
+	char *endp;
+	unsigned long val;
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+
+	if (val & BR_GROUPFWD_RESTRICTED)
+		return -EINVAL;
+
+	br->group_fwd_mask = val;
+
+	return len;
+}
+static DEVICE_ATTR_RW(group_fwd_mask);
+
+static ssize_t priority_show(struct device *d, struct device_attribute *attr,
+			     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n",
+		       (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
+}
+
+static int set_priority(struct net_bridge *br, unsigned long val)
+{
+	br_stp_set_bridge_priority(br, (u16) val);
+	return 0;
+}
+
+static ssize_t priority_store(struct device *d, struct device_attribute *attr,
+			      const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_priority);
+}
+static DEVICE_ATTR_RW(priority);
+
+static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
+			    char *buf)
+{
+	return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
+}
+static DEVICE_ATTR_RO(root_id);
+
+static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
+			      char *buf)
+{
+	return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
+}
+static DEVICE_ATTR_RO(bridge_id);
+
+static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
+			      char *buf)
+{
+	return sprintf(buf, "%d\n", to_bridge(d)->root_port);
+}
+static DEVICE_ATTR_RO(root_port);
+
+static ssize_t root_path_cost_show(struct device *d,
+				   struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
+}
+static DEVICE_ATTR_RO(root_path_cost);
+
+static ssize_t topology_change_show(struct device *d,
+				    struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
+}
+static DEVICE_ATTR_RO(topology_change);
+
+static ssize_t topology_change_detected_show(struct device *d,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->topology_change_detected);
+}
+static DEVICE_ATTR_RO(topology_change_detected);
+
+static ssize_t hello_timer_show(struct device *d,
+				struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
+}
+static DEVICE_ATTR_RO(hello_timer);
+
+static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
+			      char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
+}
+static DEVICE_ATTR_RO(tcn_timer);
+
+static ssize_t topology_change_timer_show(struct device *d,
+					  struct device_attribute *attr,
+					  char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
+}
+static DEVICE_ATTR_RO(topology_change_timer);
+
+static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
+			     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
+}
+static DEVICE_ATTR_RO(gc_timer);
+
+static ssize_t group_addr_show(struct device *d,
+			       struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
+		       br->group_addr[0], br->group_addr[1],
+		       br->group_addr[2], br->group_addr[3],
+		       br->group_addr[4], br->group_addr[5]);
+}
+
+static ssize_t group_addr_store(struct device *d,
+				struct device_attribute *attr,
+				const char *buf, size_t len)
+{
+	struct net_bridge *br = to_bridge(d);
+	u8 new_addr[6];
+	int i;
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
+		   &new_addr[0], &new_addr[1], &new_addr[2],
+		   &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
+		return -EINVAL;
+
+	if (!is_link_local_ether_addr(new_addr))
+		return -EINVAL;
+
+	if (new_addr[5] == 1 ||		/* 802.3x Pause address */
+	    new_addr[5] == 2 ||		/* 802.3ad Slow protocols */
+	    new_addr[5] == 3)		/* 802.1X PAE address */
+		return -EINVAL;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	spin_lock_bh(&br->lock);
+	for (i = 0; i < 6; i++)
+		br->group_addr[i] = new_addr[i];
+	spin_unlock_bh(&br->lock);
+
+	br->group_addr_set = true;
+	br_recalculate_fwd_mask(br);
+
+	rtnl_unlock();
+
+	return len;
+}
+
+static DEVICE_ATTR_RW(group_addr);
+
+static ssize_t flush_store(struct device *d,
+			   struct device_attribute *attr,
+			   const char *buf, size_t len)
+{
+	struct net_bridge *br = to_bridge(d);
+
+	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	br_fdb_flush(br);
+	return len;
+}
+static DEVICE_ATTR_WO(flush);
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+static ssize_t multicast_router_show(struct device *d,
+				     struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->multicast_router);
+}
+
+static ssize_t multicast_router_store(struct device *d,
+				      struct device_attribute *attr,
+				      const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_multicast_set_router);
+}
+static DEVICE_ATTR_RW(multicast_router);
+
+static ssize_t multicast_snooping_show(struct device *d,
+				       struct device_attribute *attr,
+				       char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", !br->multicast_disabled);
+}
+
+static ssize_t multicast_snooping_store(struct device *d,
+					struct device_attribute *attr,
+					const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_multicast_toggle);
+}
+static DEVICE_ATTR_RW(multicast_snooping);
+
+static ssize_t multicast_query_use_ifaddr_show(struct device *d,
+					       struct device_attribute *attr,
+					       char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->multicast_query_use_ifaddr);
+}
+
+static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_query_use_ifaddr = !!val;
+	return 0;
+}
+
+static ssize_t
+multicast_query_use_ifaddr_store(struct device *d,
+				 struct device_attribute *attr,
+				 const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
+}
+static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
+
+static ssize_t multicast_querier_show(struct device *d,
+				      struct device_attribute *attr,
+				      char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->multicast_querier);
+}
+
+static ssize_t multicast_querier_store(struct device *d,
+				       struct device_attribute *attr,
+				       const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_multicast_set_querier);
+}
+static DEVICE_ATTR_RW(multicast_querier);
+
+static ssize_t hash_elasticity_show(struct device *d,
+				    struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->hash_elasticity);
+}
+
+static int set_elasticity(struct net_bridge *br, unsigned long val)
+{
+	br->hash_elasticity = val;
+	return 0;
+}
+
+static ssize_t hash_elasticity_store(struct device *d,
+				     struct device_attribute *attr,
+				     const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_elasticity);
+}
+static DEVICE_ATTR_RW(hash_elasticity);
+
+static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
+			     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->hash_max);
+}
+
+static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
+			      const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
+}
+static DEVICE_ATTR_RW(hash_max);
+
+static ssize_t multicast_last_member_count_show(struct device *d,
+						struct device_attribute *attr,
+						char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->multicast_last_member_count);
+}
+
+static int set_last_member_count(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_last_member_count = val;
+	return 0;
+}
+
+static ssize_t multicast_last_member_count_store(struct device *d,
+						 struct device_attribute *attr,
+						 const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_last_member_count);
+}
+static DEVICE_ATTR_RW(multicast_last_member_count);
+
+static ssize_t multicast_startup_query_count_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->multicast_startup_query_count);
+}
+
+static int set_startup_query_count(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_startup_query_count = val;
+	return 0;
+}
+
+static ssize_t multicast_startup_query_count_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_startup_query_count);
+}
+static DEVICE_ATTR_RW(multicast_startup_query_count);
+
+static ssize_t multicast_last_member_interval_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(br->multicast_last_member_interval));
+}
+
+static int set_last_member_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_last_member_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_last_member_interval_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_last_member_interval);
+}
+static DEVICE_ATTR_RW(multicast_last_member_interval);
+
+static ssize_t multicast_membership_interval_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(br->multicast_membership_interval));
+}
+
+static int set_membership_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_membership_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_membership_interval_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_membership_interval);
+}
+static DEVICE_ATTR_RW(multicast_membership_interval);
+
+static ssize_t multicast_querier_interval_show(struct device *d,
+					       struct device_attribute *attr,
+					       char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(br->multicast_querier_interval));
+}
+
+static int set_querier_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_querier_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_querier_interval_store(struct device *d,
+						struct device_attribute *attr,
+						const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_querier_interval);
+}
+static DEVICE_ATTR_RW(multicast_querier_interval);
+
+static ssize_t multicast_query_interval_show(struct device *d,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%lu\n",
+		       jiffies_to_clock_t(br->multicast_query_interval));
+}
+
+static int set_query_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_query_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_query_interval_store(struct device *d,
+					      struct device_attribute *attr,
+					      const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_query_interval);
+}
+static DEVICE_ATTR_RW(multicast_query_interval);
+
+static ssize_t multicast_query_response_interval_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(
+		buf, "%lu\n",
+		jiffies_to_clock_t(br->multicast_query_response_interval));
+}
+
+static int set_query_response_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_query_response_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_query_response_interval_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_query_response_interval);
+}
+static DEVICE_ATTR_RW(multicast_query_response_interval);
+
+static ssize_t multicast_startup_query_interval_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(
+		buf, "%lu\n",
+		jiffies_to_clock_t(br->multicast_startup_query_interval));
+}
+
+static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
+{
+	br->multicast_startup_query_interval = clock_t_to_jiffies(val);
+	return 0;
+}
+
+static ssize_t multicast_startup_query_interval_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_startup_query_interval);
+}
+static DEVICE_ATTR_RW(multicast_startup_query_interval);
+#endif
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+static ssize_t nf_call_iptables_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->nf_call_iptables);
+}
+
+static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
+{
+	br->nf_call_iptables = val ? true : false;
+	return 0;
+}
+
+static ssize_t nf_call_iptables_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_nf_call_iptables);
+}
+static DEVICE_ATTR_RW(nf_call_iptables);
+
+static ssize_t nf_call_ip6tables_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->nf_call_ip6tables);
+}
+
+static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
+{
+	br->nf_call_ip6tables = val ? true : false;
+	return 0;
+}
+
+static ssize_t nf_call_ip6tables_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
+}
+static DEVICE_ATTR_RW(nf_call_ip6tables);
+
+static ssize_t nf_call_arptables_show(
+	struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%u\n", br->nf_call_arptables);
+}
+
+static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
+{
+	br->nf_call_arptables = val ? true : false;
+	return 0;
+}
+
+static ssize_t nf_call_arptables_store(
+	struct device *d, struct device_attribute *attr, const char *buf,
+	size_t len)
+{
+	return store_bridge_parm(d, buf, len, set_nf_call_arptables);
+}
+static DEVICE_ATTR_RW(nf_call_arptables);
+#endif
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+static ssize_t vlan_filtering_show(struct device *d,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->vlan_enabled);
+}
+
+static ssize_t vlan_filtering_store(struct device *d,
+				    struct device_attribute *attr,
+				    const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
+}
+static DEVICE_ATTR_RW(vlan_filtering);
+
+static ssize_t vlan_protocol_show(struct device *d,
+				  struct device_attribute *attr,
+				  char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
+}
+
+static ssize_t vlan_protocol_store(struct device *d,
+				   struct device_attribute *attr,
+				   const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_vlan_set_proto);
+}
+static DEVICE_ATTR_RW(vlan_protocol);
+
+static ssize_t default_pvid_show(struct device *d,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct net_bridge *br = to_bridge(d);
+	return sprintf(buf, "%d\n", br->default_pvid);
+}
+
+static ssize_t default_pvid_store(struct device *d,
+				  struct device_attribute *attr,
+				  const char *buf, size_t len)
+{
+	return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
+}
+static DEVICE_ATTR_RW(default_pvid);
+#endif
+
+static struct attribute *bridge_attrs[] = {
+	&dev_attr_forward_delay.attr,
+	&dev_attr_hello_time.attr,
+	&dev_attr_max_age.attr,
+	&dev_attr_ageing_time.attr,
+	&dev_attr_stp_state.attr,
+	&dev_attr_group_fwd_mask.attr,
+	&dev_attr_priority.attr,
+	&dev_attr_bridge_id.attr,
+	&dev_attr_root_id.attr,
+	&dev_attr_root_path_cost.attr,
+	&dev_attr_root_port.attr,
+	&dev_attr_topology_change.attr,
+	&dev_attr_topology_change_detected.attr,
+	&dev_attr_hello_timer.attr,
+	&dev_attr_tcn_timer.attr,
+	&dev_attr_topology_change_timer.attr,
+	&dev_attr_gc_timer.attr,
+	&dev_attr_group_addr.attr,
+	&dev_attr_flush.attr,
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+	&dev_attr_multicast_router.attr,
+	&dev_attr_multicast_snooping.attr,
+	&dev_attr_multicast_querier.attr,
+	&dev_attr_multicast_query_use_ifaddr.attr,
+	&dev_attr_hash_elasticity.attr,
+	&dev_attr_hash_max.attr,
+	&dev_attr_multicast_last_member_count.attr,
+	&dev_attr_multicast_startup_query_count.attr,
+	&dev_attr_multicast_last_member_interval.attr,
+	&dev_attr_multicast_membership_interval.attr,
+	&dev_attr_multicast_querier_interval.attr,
+	&dev_attr_multicast_query_interval.attr,
+	&dev_attr_multicast_query_response_interval.attr,
+	&dev_attr_multicast_startup_query_interval.attr,
+#endif
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+	&dev_attr_nf_call_iptables.attr,
+	&dev_attr_nf_call_ip6tables.attr,
+	&dev_attr_nf_call_arptables.attr,
+#endif
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+	&dev_attr_vlan_filtering.attr,
+	&dev_attr_vlan_protocol.attr,
+	&dev_attr_default_pvid.attr,
+#endif
+	NULL
+};
+
+static struct attribute_group bridge_group = {
+	.name = SYSFS_BRIDGE_ATTR,
+	.attrs = bridge_attrs,
+};
+
+/*
+ * Export the forwarding information table as a binary file
+ * The records are struct __fdb_entry.
+ *
+ * Returns the number of bytes read.
+ */
+static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
+			      struct bin_attribute *bin_attr,
+			      char *buf, loff_t off, size_t count)
+{
+	struct device *dev = to_dev(kobj);
+	struct net_bridge *br = to_bridge(dev);
+	int n;
+
+	/* must read whole records */
+	if (off % sizeof(struct __fdb_entry) != 0)
+		return -EINVAL;
+
+	n =  br_fdb_fillbuf(br, buf,
+			    count / sizeof(struct __fdb_entry),
+			    off / sizeof(struct __fdb_entry));
+
+	if (n > 0)
+		n *= sizeof(struct __fdb_entry);
+
+	return n;
+}
+
+static struct bin_attribute bridge_forward = {
+	.attr = { .name = SYSFS_BRIDGE_FDB,
+		  .mode = S_IRUGO, },
+	.read = brforward_read,
+};
+
+/*
+ * Add entries in sysfs onto the existing network class device
+ * for the bridge.
+ *   Adds a attribute group "bridge" containing tuning parameters.
+ *   Binary attribute containing the forward table
+ *   Sub directory to hold links to interfaces.
+ *
+ * Note: the ifobj exists only to be a subdirectory
+ *   to hold links.  The ifobj exists in same data structure
+ *   as it's parent the bridge so reference counting works.
+ */
+int br_sysfs_addbr(struct net_device *dev)
+{
+	struct kobject *brobj = &dev->dev.kobj;
+	struct net_bridge *br = netdev_priv(dev);
+	int err;
+
+	err = sysfs_create_group(brobj, &bridge_group);
+	if (err) {
+		pr_info("%s: can't create group %s/%s\n",
+			__func__, dev->name, bridge_group.name);
+		goto out1;
+	}
+
+	err = sysfs_create_bin_file(brobj, &bridge_forward);
+	if (err) {
+		pr_info("%s: can't create attribute file %s/%s\n",
+			__func__, dev->name, bridge_forward.attr.name);
+		goto out2;
+	}
+
+	br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
+	if (!br->ifobj) {
+		pr_info("%s: can't add kobject (directory) %s/%s\n",
+			__func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
+		goto out3;
+	}
+	return 0;
+ out3:
+	sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
+ out2:
+	sysfs_remove_group(&dev->dev.kobj, &bridge_group);
+ out1:
+	return err;
+
+}
+
+void br_sysfs_delbr(struct net_device *dev)
+{
+	struct kobject *kobj = &dev->dev.kobj;
+	struct net_bridge *br = netdev_priv(dev);
+
+	kobject_put(br->ifobj);
+	sysfs_remove_bin_file(kobj, &bridge_forward);
+	sysfs_remove_group(kobj, &bridge_group);
+}
diff --git a/kernel/net/bridge/br_sysfs_if.c b/kernel/net/bridge/br_sysfs_if.c
new file mode 100644
index 000000000..4905845a9
--- /dev/null
+++ b/kernel/net/bridge/br_sysfs_if.c
@@ -0,0 +1,316 @@
+/*
+ *	Sysfs attributes of bridge ports
+ *	Linux ethernet bridge
+ *
+ *	Authors:
+ *	Stephen Hemminger		<shemminger@osdl.org>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/rtnetlink.h>
+#include <linux/spinlock.h>
+
+#include "br_private.h"
+
+struct brport_attribute {
+	struct attribute	attr;
+	ssize_t (*show)(struct net_bridge_port *, char *);
+	int (*store)(struct net_bridge_port *, unsigned long);
+};
+
+#define BRPORT_ATTR(_name, _mode, _show, _store)		\
+const struct brport_attribute brport_attr_##_name = { 	        \
+	.attr = {.name = __stringify(_name), 			\
+		 .mode = _mode },				\
+	.show	= _show,					\
+	.store	= _store,					\
+};
+
+#define BRPORT_ATTR_FLAG(_name, _mask)				\
+static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \
+{								\
+	return sprintf(buf, "%d\n", !!(p->flags & _mask));	\
+}								\
+static int store_##_name(struct net_bridge_port *p, unsigned long v) \
+{								\
+	return store_flag(p, v, _mask);				\
+}								\
+static BRPORT_ATTR(_name, S_IRUGO | S_IWUSR,			\
+		   show_##_name, store_##_name)
+
+static int store_flag(struct net_bridge_port *p, unsigned long v,
+		      unsigned long mask)
+{
+	unsigned long flags;
+
+	flags = p->flags;
+
+	if (v)
+		flags |= mask;
+	else
+		flags &= ~mask;
+
+	if (flags != p->flags) {
+		p->flags = flags;
+		br_port_flags_change(p, mask);
+		br_ifinfo_notify(RTM_NEWLINK, p);
+	}
+	return 0;
+}
+
+static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->path_cost);
+}
+
+static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
+		   show_path_cost, br_stp_set_path_cost);
+
+static ssize_t show_priority(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->priority);
+}
+
+static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
+			 show_priority, br_stp_set_port_priority);
+
+static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
+{
+	return br_show_bridge_id(buf, &p->designated_root);
+}
+static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
+
+static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
+{
+	return br_show_bridge_id(buf, &p->designated_bridge);
+}
+static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
+
+static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->designated_port);
+}
+static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
+
+static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->designated_cost);
+}
+static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
+
+static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "0x%x\n", p->port_id);
+}
+static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
+
+static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "0x%x\n", p->port_no);
+}
+
+static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
+
+static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->topology_change_ack);
+}
+static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
+
+static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->config_pending);
+}
+static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
+
+static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->state);
+}
+static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
+
+static ssize_t show_message_age_timer(struct net_bridge_port *p,
+					    char *buf)
+{
+	return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
+}
+static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
+
+static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
+					    char *buf)
+{
+	return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
+}
+static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
+
+static ssize_t show_hold_timer(struct net_bridge_port *p,
+					    char *buf)
+{
+	return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
+}
+static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
+
+static int store_flush(struct net_bridge_port *p, unsigned long v)
+{
+	br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry
+	return 0;
+}
+static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush);
+
+BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE);
+BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD);
+BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK);
+BRPORT_ATTR_FLAG(learning, BR_LEARNING);
+BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD);
+BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
+BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
+
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
+{
+	return sprintf(buf, "%d\n", p->multicast_router);
+}
+
+static int store_multicast_router(struct net_bridge_port *p,
+				      unsigned long v)
+{
+	return br_multicast_set_port_router(p, v);
+}
+static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
+		   store_multicast_router);
+
+BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE);
+#endif
+
+static const struct brport_attribute *brport_attrs[] = {
+	&brport_attr_path_cost,
+	&brport_attr_priority,
+	&brport_attr_port_id,
+	&brport_attr_port_no,
+	&brport_attr_designated_root,
+	&brport_attr_designated_bridge,
+	&brport_attr_designated_port,
+	&brport_attr_designated_cost,
+	&brport_attr_state,
+	&brport_attr_change_ack,
+	&brport_attr_config_pending,
+	&brport_attr_message_age_timer,
+	&brport_attr_forward_delay_timer,
+	&brport_attr_hold_timer,
+	&brport_attr_flush,
+	&brport_attr_hairpin_mode,
+	&brport_attr_bpdu_guard,
+	&brport_attr_root_block,
+	&brport_attr_learning,
+	&brport_attr_unicast_flood,
+#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+	&brport_attr_multicast_router,
+	&brport_attr_multicast_fast_leave,
+#endif
+	&brport_attr_proxyarp,
+	&brport_attr_proxyarp_wifi,
+	NULL
+};
+
+#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
+#define to_brport(obj)	container_of(obj, struct net_bridge_port, kobj)
+
+static ssize_t brport_show(struct kobject *kobj,
+			   struct attribute *attr, char *buf)
+{
+	struct brport_attribute *brport_attr = to_brport_attr(attr);
+	struct net_bridge_port *p = to_brport(kobj);
+
+	return brport_attr->show(p, buf);
+}
+
+static ssize_t brport_store(struct kobject *kobj,
+			    struct attribute *attr,
+			    const char *buf, size_t count)
+{
+	struct brport_attribute *brport_attr = to_brport_attr(attr);
+	struct net_bridge_port *p = to_brport(kobj);
+	ssize_t ret = -EINVAL;
+	char *endp;
+	unsigned long val;
+
+	if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp != buf) {
+		if (!rtnl_trylock())
+			return restart_syscall();
+		if (p->dev && p->br && brport_attr->store) {
+			spin_lock_bh(&p->br->lock);
+			ret = brport_attr->store(p, val);
+			spin_unlock_bh(&p->br->lock);
+			if (ret == 0)
+				ret = count;
+		}
+		rtnl_unlock();
+	}
+	return ret;
+}
+
+const struct sysfs_ops brport_sysfs_ops = {
+	.show = brport_show,
+	.store = brport_store,
+};
+
+/*
+ * Add sysfs entries to ethernet device added to a bridge.
+ * Creates a brport subdirectory with bridge attributes.
+ * Puts symlink in bridge's brif subdirectory
+ */
+int br_sysfs_addif(struct net_bridge_port *p)
+{
+	struct net_bridge *br = p->br;
+	const struct brport_attribute **a;
+	int err;
+
+	err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
+				SYSFS_BRIDGE_PORT_LINK);
+	if (err)
+		return err;
+
+	for (a = brport_attrs; *a; ++a) {
+		err = sysfs_create_file(&p->kobj, &((*a)->attr));
+		if (err)
+			return err;
+	}
+
+	strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
+	return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name);
+}
+
+/* Rename bridge's brif symlink */
+int br_sysfs_renameif(struct net_bridge_port *p)
+{
+	struct net_bridge *br = p->br;
+	int err;
+
+	/* If a rename fails, the rollback will cause another
+	 * rename call with the existing name.
+	 */
+	if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ))
+		return 0;
+
+	err = sysfs_rename_link(br->ifobj, &p->kobj,
+				p->sysfs_name, p->dev->name);
+	if (err)
+		netdev_notice(br->dev, "unable to rename link %s to %s",
+			      p->sysfs_name, p->dev->name);
+	else
+		strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
+
+	return err;
+}
diff --git a/kernel/net/bridge/br_vlan.c b/kernel/net/bridge/br_vlan.c
new file mode 100644
index 000000000..13013fe8d
--- /dev/null
+++ b/kernel/net/bridge/br_vlan.c
@@ -0,0 +1,736 @@
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/slab.h>
+
+#include "br_private.h"
+
+static void __vlan_add_pvid(struct net_port_vlans *v, u16 vid)
+{
+	if (v->pvid == vid)
+		return;
+
+	smp_wmb();
+	v->pvid = vid;
+}
+
+static void __vlan_delete_pvid(struct net_port_vlans *v, u16 vid)
+{
+	if (v->pvid != vid)
+		return;
+
+	smp_wmb();
+	v->pvid = 0;
+}
+
+static void __vlan_add_flags(struct net_port_vlans *v, u16 vid, u16 flags)
+{
+	if (flags & BRIDGE_VLAN_INFO_PVID)
+		__vlan_add_pvid(v, vid);
+	else
+		__vlan_delete_pvid(v, vid);
+
+	if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
+		set_bit(vid, v->untagged_bitmap);
+	else
+		clear_bit(vid, v->untagged_bitmap);
+}
+
+static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)
+{
+	struct net_bridge_port *p = NULL;
+	struct net_bridge *br;
+	struct net_device *dev;
+	int err;
+
+	if (test_bit(vid, v->vlan_bitmap)) {
+		__vlan_add_flags(v, vid, flags);
+		return 0;
+	}
+
+	if (v->port_idx) {
+		p = v->parent.port;
+		br = p->br;
+		dev = p->dev;
+	} else {
+		br = v->parent.br;
+		dev = br->dev;
+	}
+
+	if (p) {
+		/* Add VLAN to the device filter if it is supported.
+		 * This ensures tagged traffic enters the bridge when
+		 * promiscuous mode is disabled by br_manage_promisc().
+		 */
+		err = vlan_vid_add(dev, br->vlan_proto, vid);
+		if (err)
+			return err;
+	}
+
+	err = br_fdb_insert(br, p, dev->dev_addr, vid);
+	if (err) {
+		br_err(br, "failed insert local address into bridge "
+		       "forwarding table\n");
+		goto out_filt;
+	}
+
+	set_bit(vid, v->vlan_bitmap);
+	v->num_vlans++;
+	__vlan_add_flags(v, vid, flags);
+
+	return 0;
+
+out_filt:
+	if (p)
+		vlan_vid_del(dev, br->vlan_proto, vid);
+	return err;
+}
+
+static int __vlan_del(struct net_port_vlans *v, u16 vid)
+{
+	if (!test_bit(vid, v->vlan_bitmap))
+		return -EINVAL;
+
+	__vlan_delete_pvid(v, vid);
+	clear_bit(vid, v->untagged_bitmap);
+
+	if (v->port_idx) {
+		struct net_bridge_port *p = v->parent.port;
+		vlan_vid_del(p->dev, p->br->vlan_proto, vid);
+	}
+
+	clear_bit(vid, v->vlan_bitmap);
+	v->num_vlans--;
+	if (bitmap_empty(v->vlan_bitmap, VLAN_N_VID)) {
+		if (v->port_idx)
+			RCU_INIT_POINTER(v->parent.port->vlan_info, NULL);
+		else
+			RCU_INIT_POINTER(v->parent.br->vlan_info, NULL);
+		kfree_rcu(v, rcu);
+	}
+	return 0;
+}
+
+static void __vlan_flush(struct net_port_vlans *v)
+{
+	smp_wmb();
+	v->pvid = 0;
+	bitmap_zero(v->vlan_bitmap, VLAN_N_VID);
+	if (v->port_idx)
+		RCU_INIT_POINTER(v->parent.port->vlan_info, NULL);
+	else
+		RCU_INIT_POINTER(v->parent.br->vlan_info, NULL);
+	kfree_rcu(v, rcu);
+}
+
+struct sk_buff *br_handle_vlan(struct net_bridge *br,
+			       const struct net_port_vlans *pv,
+			       struct sk_buff *skb)
+{
+	u16 vid;
+
+	/* If this packet was not filtered at input, let it pass */
+	if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
+		goto out;
+
+	/* Vlan filter table must be configured at this point.  The
+	 * only exception is the bridge is set in promisc mode and the
+	 * packet is destined for the bridge device.  In this case
+	 * pass the packet as is.
+	 */
+	if (!pv) {
+		if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
+			goto out;
+		} else {
+			kfree_skb(skb);
+			return NULL;
+		}
+	}
+
+	/* At this point, we know that the frame was filtered and contains
+	 * a valid vlan id.  If the vlan id is set in the untagged bitmap,
+	 * send untagged; otherwise, send tagged.
+	 */
+	br_vlan_get_tag(skb, &vid);
+	if (test_bit(vid, pv->untagged_bitmap))
+		skb->vlan_tci = 0;
+
+out:
+	return skb;
+}
+
+/* Called under RCU */
+bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
+			struct sk_buff *skb, u16 *vid)
+{
+	bool tagged;
+	__be16 proto;
+
+	/* If VLAN filtering is disabled on the bridge, all packets are
+	 * permitted.
+	 */
+	if (!br->vlan_enabled) {
+		BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
+		return true;
+	}
+
+	/* If there are no vlan in the permitted list, all packets are
+	 * rejected.
+	 */
+	if (!v)
+		goto drop;
+
+	BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
+	proto = br->vlan_proto;
+
+	/* If vlan tx offload is disabled on bridge device and frame was
+	 * sent from vlan device on the bridge device, it does not have
+	 * HW accelerated vlan tag.
+	 */
+	if (unlikely(!skb_vlan_tag_present(skb) &&
+		     skb->protocol == proto)) {
+		skb = skb_vlan_untag(skb);
+		if (unlikely(!skb))
+			return false;
+	}
+
+	if (!br_vlan_get_tag(skb, vid)) {
+		/* Tagged frame */
+		if (skb->vlan_proto != proto) {
+			/* Protocol-mismatch, empty out vlan_tci for new tag */
+			skb_push(skb, ETH_HLEN);
+			skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
+							skb_vlan_tag_get(skb));
+			if (unlikely(!skb))
+				return false;
+
+			skb_pull(skb, ETH_HLEN);
+			skb_reset_mac_len(skb);
+			*vid = 0;
+			tagged = false;
+		} else {
+			tagged = true;
+		}
+	} else {
+		/* Untagged frame */
+		tagged = false;
+	}
+
+	if (!*vid) {
+		u16 pvid = br_get_pvid(v);
+
+		/* Frame had a tag with VID 0 or did not have a tag.
+		 * See if pvid is set on this port.  That tells us which
+		 * vlan untagged or priority-tagged traffic belongs to.
+		 */
+		if (!pvid)
+			goto drop;
+
+		/* PVID is set on this port.  Any untagged or priority-tagged
+		 * ingress frame is considered to belong to this vlan.
+		 */
+		*vid = pvid;
+		if (likely(!tagged))
+			/* Untagged Frame. */
+			__vlan_hwaccel_put_tag(skb, proto, pvid);
+		else
+			/* Priority-tagged Frame.
+			 * At this point, We know that skb->vlan_tci had
+			 * VLAN_TAG_PRESENT bit and its VID field was 0x000.
+			 * We update only VID field and preserve PCP field.
+			 */
+			skb->vlan_tci |= pvid;
+
+		return true;
+	}
+
+	/* Frame had a valid vlan tag.  See if vlan is allowed */
+	if (test_bit(*vid, v->vlan_bitmap))
+		return true;
+drop:
+	kfree_skb(skb);
+	return false;
+}
+
+/* Called under RCU. */
+bool br_allowed_egress(struct net_bridge *br,
+		       const struct net_port_vlans *v,
+		       const struct sk_buff *skb)
+{
+	u16 vid;
+
+	/* If this packet was not filtered at input, let it pass */
+	if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
+		return true;
+
+	if (!v)
+		return false;
+
+	br_vlan_get_tag(skb, &vid);
+	if (test_bit(vid, v->vlan_bitmap))
+		return true;
+
+	return false;
+}
+
+/* Called under RCU */
+bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
+{
+	struct net_bridge *br = p->br;
+	struct net_port_vlans *v;
+
+	/* If filtering was disabled at input, let it pass. */
+	if (!br->vlan_enabled)
+		return true;
+
+	v = rcu_dereference(p->vlan_info);
+	if (!v)
+		return false;
+
+	if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
+		*vid = 0;
+
+	if (!*vid) {
+		*vid = br_get_pvid(v);
+		if (!*vid)
+			return false;
+
+		return true;
+	}
+
+	if (test_bit(*vid, v->vlan_bitmap))
+		return true;
+
+	return false;
+}
+
+/* Must be protected by RTNL.
+ * Must be called with vid in range from 1 to 4094 inclusive.
+ */
+int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
+{
+	struct net_port_vlans *pv = NULL;
+	int err;
+
+	ASSERT_RTNL();
+
+	pv = rtnl_dereference(br->vlan_info);
+	if (pv)
+		return __vlan_add(pv, vid, flags);
+
+	/* Create port vlan infomration
+	 */
+	pv = kzalloc(sizeof(*pv), GFP_KERNEL);
+	if (!pv)
+		return -ENOMEM;
+
+	pv->parent.br = br;
+	err = __vlan_add(pv, vid, flags);
+	if (err)
+		goto out;
+
+	rcu_assign_pointer(br->vlan_info, pv);
+	return 0;
+out:
+	kfree(pv);
+	return err;
+}
+
+/* Must be protected by RTNL.
+ * Must be called with vid in range from 1 to 4094 inclusive.
+ */
+int br_vlan_delete(struct net_bridge *br, u16 vid)
+{
+	struct net_port_vlans *pv;
+
+	ASSERT_RTNL();
+
+	pv = rtnl_dereference(br->vlan_info);
+	if (!pv)
+		return -EINVAL;
+
+	br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
+
+	__vlan_del(pv, vid);
+	return 0;
+}
+
+void br_vlan_flush(struct net_bridge *br)
+{
+	struct net_port_vlans *pv;
+
+	ASSERT_RTNL();
+	pv = rtnl_dereference(br->vlan_info);
+	if (!pv)
+		return;
+
+	__vlan_flush(pv);
+}
+
+bool br_vlan_find(struct net_bridge *br, u16 vid)
+{
+	struct net_port_vlans *pv;
+	bool found = false;
+
+	rcu_read_lock();
+	pv = rcu_dereference(br->vlan_info);
+
+	if (!pv)
+		goto out;
+
+	if (test_bit(vid, pv->vlan_bitmap))
+		found = true;
+
+out:
+	rcu_read_unlock();
+	return found;
+}
+
+/* Must be protected by RTNL. */
+static void recalculate_group_addr(struct net_bridge *br)
+{
+	if (br->group_addr_set)
+		return;
+
+	spin_lock_bh(&br->lock);
+	if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) {
+		/* Bridge Group Address */
+		br->group_addr[5] = 0x00;
+	} else { /* vlan_enabled && ETH_P_8021AD */
+		/* Provider Bridge Group Address */
+		br->group_addr[5] = 0x08;
+	}
+	spin_unlock_bh(&br->lock);
+}
+
+/* Must be protected by RTNL. */
+void br_recalculate_fwd_mask(struct net_bridge *br)
+{
+	if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q))
+		br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
+	else /* vlan_enabled && ETH_P_8021AD */
+		br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
+					      ~(1u << br->group_addr[5]);
+}
+
+int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
+{
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	if (br->vlan_enabled == val)
+		goto unlock;
+
+	br->vlan_enabled = val;
+	br_manage_promisc(br);
+	recalculate_group_addr(br);
+	br_recalculate_fwd_mask(br);
+
+unlock:
+	rtnl_unlock();
+	return 0;
+}
+
+int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
+{
+	int err = 0;
+	struct net_bridge_port *p;
+	struct net_port_vlans *pv;
+	__be16 proto, oldproto;
+	u16 vid, errvid;
+
+	if (val != ETH_P_8021Q && val != ETH_P_8021AD)
+		return -EPROTONOSUPPORT;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	proto = htons(val);
+	if (br->vlan_proto == proto)
+		goto unlock;
+
+	/* Add VLANs for the new proto to the device filter. */
+	list_for_each_entry(p, &br->port_list, list) {
+		pv = rtnl_dereference(p->vlan_info);
+		if (!pv)
+			continue;
+
+		for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+			err = vlan_vid_add(p->dev, proto, vid);
+			if (err)
+				goto err_filt;
+		}
+	}
+
+	oldproto = br->vlan_proto;
+	br->vlan_proto = proto;
+
+	recalculate_group_addr(br);
+	br_recalculate_fwd_mask(br);
+
+	/* Delete VLANs for the old proto from the device filter. */
+	list_for_each_entry(p, &br->port_list, list) {
+		pv = rtnl_dereference(p->vlan_info);
+		if (!pv)
+			continue;
+
+		for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID)
+			vlan_vid_del(p->dev, oldproto, vid);
+	}
+
+unlock:
+	rtnl_unlock();
+	return err;
+
+err_filt:
+	errvid = vid;
+	for_each_set_bit(vid, pv->vlan_bitmap, errvid)
+		vlan_vid_del(p->dev, proto, vid);
+
+	list_for_each_entry_continue_reverse(p, &br->port_list, list) {
+		pv = rtnl_dereference(p->vlan_info);
+		if (!pv)
+			continue;
+
+		for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID)
+			vlan_vid_del(p->dev, proto, vid);
+	}
+
+	goto unlock;
+}
+
+static bool vlan_default_pvid(struct net_port_vlans *pv, u16 vid)
+{
+	return pv && vid == pv->pvid && test_bit(vid, pv->untagged_bitmap);
+}
+
+static void br_vlan_disable_default_pvid(struct net_bridge *br)
+{
+	struct net_bridge_port *p;
+	u16 pvid = br->default_pvid;
+
+	/* Disable default_pvid on all ports where it is still
+	 * configured.
+	 */
+	if (vlan_default_pvid(br_get_vlan_info(br), pvid))
+		br_vlan_delete(br, pvid);
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (vlan_default_pvid(nbp_get_vlan_info(p), pvid))
+			nbp_vlan_delete(p, pvid);
+	}
+
+	br->default_pvid = 0;
+}
+
+static int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid)
+{
+	struct net_bridge_port *p;
+	u16 old_pvid;
+	int err = 0;
+	unsigned long *changed;
+
+	changed = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long),
+			  GFP_KERNEL);
+	if (!changed)
+		return -ENOMEM;
+
+	old_pvid = br->default_pvid;
+
+	/* Update default_pvid config only if we do not conflict with
+	 * user configuration.
+	 */
+	if ((!old_pvid || vlan_default_pvid(br_get_vlan_info(br), old_pvid)) &&
+	    !br_vlan_find(br, pvid)) {
+		err = br_vlan_add(br, pvid,
+				  BRIDGE_VLAN_INFO_PVID |
+				  BRIDGE_VLAN_INFO_UNTAGGED);
+		if (err)
+			goto out;
+		br_vlan_delete(br, old_pvid);
+		set_bit(0, changed);
+	}
+
+	list_for_each_entry(p, &br->port_list, list) {
+		/* Update default_pvid config only if we do not conflict with
+		 * user configuration.
+		 */
+		if ((old_pvid &&
+		     !vlan_default_pvid(nbp_get_vlan_info(p), old_pvid)) ||
+		    nbp_vlan_find(p, pvid))
+			continue;
+
+		err = nbp_vlan_add(p, pvid,
+				   BRIDGE_VLAN_INFO_PVID |
+				   BRIDGE_VLAN_INFO_UNTAGGED);
+		if (err)
+			goto err_port;
+		nbp_vlan_delete(p, old_pvid);
+		set_bit(p->port_no, changed);
+	}
+
+	br->default_pvid = pvid;
+
+out:
+	kfree(changed);
+	return err;
+
+err_port:
+	list_for_each_entry_continue_reverse(p, &br->port_list, list) {
+		if (!test_bit(p->port_no, changed))
+			continue;
+
+		if (old_pvid)
+			nbp_vlan_add(p, old_pvid,
+				     BRIDGE_VLAN_INFO_PVID |
+				     BRIDGE_VLAN_INFO_UNTAGGED);
+		nbp_vlan_delete(p, pvid);
+	}
+
+	if (test_bit(0, changed)) {
+		if (old_pvid)
+			br_vlan_add(br, old_pvid,
+				    BRIDGE_VLAN_INFO_PVID |
+				    BRIDGE_VLAN_INFO_UNTAGGED);
+		br_vlan_delete(br, pvid);
+	}
+	goto out;
+}
+
+int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val)
+{
+	u16 pvid = val;
+	int err = 0;
+
+	if (val >= VLAN_VID_MASK)
+		return -EINVAL;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	if (pvid == br->default_pvid)
+		goto unlock;
+
+	/* Only allow default pvid change when filtering is disabled */
+	if (br->vlan_enabled) {
+		pr_info_once("Please disable vlan filtering to change default_pvid\n");
+		err = -EPERM;
+		goto unlock;
+	}
+
+	if (!pvid)
+		br_vlan_disable_default_pvid(br);
+	else
+		err = __br_vlan_set_default_pvid(br, pvid);
+
+unlock:
+	rtnl_unlock();
+	return err;
+}
+
+int br_vlan_init(struct net_bridge *br)
+{
+	br->vlan_proto = htons(ETH_P_8021Q);
+	br->default_pvid = 1;
+	return br_vlan_add(br, 1,
+			   BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED);
+}
+
+/* Must be protected by RTNL.
+ * Must be called with vid in range from 1 to 4094 inclusive.
+ */
+int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
+{
+	struct net_port_vlans *pv = NULL;
+	int err;
+
+	ASSERT_RTNL();
+
+	pv = rtnl_dereference(port->vlan_info);
+	if (pv)
+		return __vlan_add(pv, vid, flags);
+
+	/* Create port vlan infomration
+	 */
+	pv = kzalloc(sizeof(*pv), GFP_KERNEL);
+	if (!pv) {
+		err = -ENOMEM;
+		goto clean_up;
+	}
+
+	pv->port_idx = port->port_no;
+	pv->parent.port = port;
+	err = __vlan_add(pv, vid, flags);
+	if (err)
+		goto clean_up;
+
+	rcu_assign_pointer(port->vlan_info, pv);
+	return 0;
+
+clean_up:
+	kfree(pv);
+	return err;
+}
+
+/* Must be protected by RTNL.
+ * Must be called with vid in range from 1 to 4094 inclusive.
+ */
+int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
+{
+	struct net_port_vlans *pv;
+
+	ASSERT_RTNL();
+
+	pv = rtnl_dereference(port->vlan_info);
+	if (!pv)
+		return -EINVAL;
+
+	br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
+
+	return __vlan_del(pv, vid);
+}
+
+void nbp_vlan_flush(struct net_bridge_port *port)
+{
+	struct net_port_vlans *pv;
+	u16 vid;
+
+	ASSERT_RTNL();
+
+	pv = rtnl_dereference(port->vlan_info);
+	if (!pv)
+		return;
+
+	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID)
+		vlan_vid_del(port->dev, port->br->vlan_proto, vid);
+
+	__vlan_flush(pv);
+}
+
+bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
+{
+	struct net_port_vlans *pv;
+	bool found = false;
+
+	rcu_read_lock();
+	pv = rcu_dereference(port->vlan_info);
+
+	if (!pv)
+		goto out;
+
+	if (test_bit(vid, pv->vlan_bitmap))
+		found = true;
+
+out:
+	rcu_read_unlock();
+	return found;
+}
+
+int nbp_vlan_init(struct net_bridge_port *p)
+{
+	return p->br->default_pvid ?
+			nbp_vlan_add(p, p->br->default_pvid,
+				     BRIDGE_VLAN_INFO_PVID |
+				     BRIDGE_VLAN_INFO_UNTAGGED) :
+			0;
+}
diff --git a/kernel/net/bridge/netfilter/Kconfig b/kernel/net/bridge/netfilter/Kconfig
new file mode 100644
index 000000000..9cebf47ac
--- /dev/null
+++ b/kernel/net/bridge/netfilter/Kconfig
@@ -0,0 +1,227 @@
+#
+# Bridge netfilter configuration
+#
+#
+menuconfig NF_TABLES_BRIDGE
+	depends on BRIDGE && NETFILTER && NF_TABLES
+	tristate "Ethernet Bridge nf_tables support"
+
+if NF_TABLES_BRIDGE
+
+config NFT_BRIDGE_META
+	tristate "Netfilter nf_table bridge meta support"
+	depends on NFT_META
+	help
+	  Add support for bridge dedicated meta key.
+
+config NFT_BRIDGE_REJECT
+	tristate "Netfilter nf_tables bridge reject support"
+	depends on NFT_REJECT && NFT_REJECT_IPV4 && NFT_REJECT_IPV6
+	help
+	  Add support to reject packets.
+
+config NF_LOG_BRIDGE
+	tristate "Bridge packet logging"
+
+endif # NF_TABLES_BRIDGE
+
+menuconfig BRIDGE_NF_EBTABLES
+	tristate "Ethernet Bridge tables (ebtables) support"
+	depends on BRIDGE && NETFILTER && NETFILTER_XTABLES
+	help
+	  ebtables is a general, extensible frame/packet identification
+	  framework. Say 'Y' or 'M' here if you want to do Ethernet
+	  filtering/NAT/brouting on the Ethernet bridge.
+
+if BRIDGE_NF_EBTABLES
+
+#
+# tables
+#
+config BRIDGE_EBT_BROUTE
+	tristate "ebt: broute table support"
+	help
+	  The ebtables broute table is used to define rules that decide between
+	  bridging and routing frames, giving Linux the functionality of a
+	  brouter. See the man page for ebtables(8) and examples on the ebtables
+	  website.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_T_FILTER
+	tristate "ebt: filter table support"
+	help
+	  The ebtables filter table is used to define frame filtering rules at
+	  local input, forwarding and local output. See the man page for
+	  ebtables(8).
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_T_NAT
+	tristate "ebt: nat table support"
+	help
+	  The ebtables nat table is used to define rules that alter the MAC
+	  source address (MAC SNAT) or the MAC destination address (MAC DNAT).
+	  See the man page for ebtables(8).
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+#
+# matches
+#
+config BRIDGE_EBT_802_3
+	tristate "ebt: 802.3 filter support"
+	help
+	  This option adds matching support for 802.3 Ethernet frames.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_AMONG
+	tristate "ebt: among filter support"
+	help
+	  This option adds the among match, which allows matching the MAC source
+	  and/or destination address on a list of addresses. Optionally,
+	  MAC/IP address pairs can be matched, f.e. for anti-spoofing rules.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_ARP
+	tristate "ebt: ARP filter support"
+	help
+	  This option adds the ARP match, which allows ARP and RARP header field
+	  filtering.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_IP
+	tristate "ebt: IP filter support"
+	help
+	  This option adds the IP match, which allows basic IP header field
+	  filtering.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_IP6
+	tristate "ebt: IP6 filter support"
+	depends on BRIDGE_NF_EBTABLES && IPV6
+	help
+	  This option adds the IP6 match, which allows basic IPV6 header field
+	  filtering.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_LIMIT
+	tristate "ebt: limit match support"
+	help
+	  This option adds the limit match, which allows you to control
+	  the rate at which a rule can be matched. This match is the
+	  equivalent of the iptables limit match.
+
+	  If you want to compile it as a module, say M here and read
+	  <file:Documentation/kbuild/modules.txt>.  If unsure, say `N'.
+
+config BRIDGE_EBT_MARK
+	tristate "ebt: mark filter support"
+	help
+	  This option adds the mark match, which allows matching frames based on
+	  the 'nfmark' value in the frame. This can be set by the mark target.
+	  This value is the same as the one used in the iptables mark match and
+	  target.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_PKTTYPE
+	tristate "ebt: packet type filter support"
+	help
+	  This option adds the packet type match, which allows matching on the
+	  type of packet based on its Ethernet "class" (as determined by
+	  the generic networking code): broadcast, multicast,
+	  for this host alone or for another host.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_STP
+	tristate "ebt: STP filter support"
+	help
+	  This option adds the Spanning Tree Protocol match, which
+	  allows STP header field filtering.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_VLAN
+	tristate "ebt: 802.1Q VLAN filter support"
+	help
+	  This option adds the 802.1Q vlan match, which allows the filtering of
+	  802.1Q vlan fields.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+#
+# targets
+#
+config BRIDGE_EBT_ARPREPLY
+	tristate "ebt: arp reply target support"
+	depends on BRIDGE_NF_EBTABLES && INET
+	help
+	  This option adds the arp reply target, which allows
+	  automatically sending arp replies to arp requests.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_DNAT
+	tristate "ebt: dnat target support"
+	help
+	  This option adds the MAC DNAT target, which allows altering the MAC
+	  destination address of frames.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_MARK_T
+	tristate "ebt: mark target support"
+	help
+	  This option adds the mark target, which allows marking frames by
+	  setting the 'nfmark' value in the frame.
+	  This value is the same as the one used in the iptables mark match and
+	  target.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_REDIRECT
+	tristate "ebt: redirect target support"
+	help
+	  This option adds the MAC redirect target, which allows altering the MAC
+	  destination address of a frame to that of the device it arrived on.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_SNAT
+	tristate "ebt: snat target support"
+	help
+	  This option adds the MAC SNAT target, which allows altering the MAC
+	  source address of frames.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+#
+# watchers
+#
+config BRIDGE_EBT_LOG
+	tristate "ebt: log support"
+	help
+	  This option adds the log watcher, that you can use in any rule
+	  in any ebtables table. It records info about the frame header
+	  to the syslog.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+config BRIDGE_EBT_NFLOG
+	tristate "ebt: nflog support"
+	help
+	  This option enables the nflog watcher, which allows to LOG
+	  messages through the netfilter logging API, which can use
+	  either the old LOG target, the old ULOG target or nfnetlink_log
+	  as backend.
+
+	  This option adds the nflog watcher, that you can use in any rule
+	  in any ebtables table.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
+endif # BRIDGE_NF_EBTABLES
diff --git a/kernel/net/bridge/netfilter/Makefile b/kernel/net/bridge/netfilter/Makefile
new file mode 100644
index 000000000..be4d0cea7
--- /dev/null
+++ b/kernel/net/bridge/netfilter/Makefile
@@ -0,0 +1,40 @@
+#
+# Makefile for the netfilter modules for Link Layer filtering on a bridge.
+#
+
+obj-$(CONFIG_NF_TABLES_BRIDGE) += nf_tables_bridge.o
+obj-$(CONFIG_NFT_BRIDGE_META)  += nft_meta_bridge.o
+obj-$(CONFIG_NFT_BRIDGE_REJECT)  += nft_reject_bridge.o
+
+# packet logging
+obj-$(CONFIG_NF_LOG_BRIDGE) += nf_log_bridge.o
+
+obj-$(CONFIG_BRIDGE_NF_EBTABLES) += ebtables.o
+
+# tables
+obj-$(CONFIG_BRIDGE_EBT_BROUTE) += ebtable_broute.o
+obj-$(CONFIG_BRIDGE_EBT_T_FILTER) += ebtable_filter.o
+obj-$(CONFIG_BRIDGE_EBT_T_NAT) += ebtable_nat.o
+
+#matches
+obj-$(CONFIG_BRIDGE_EBT_802_3) += ebt_802_3.o
+obj-$(CONFIG_BRIDGE_EBT_AMONG) += ebt_among.o
+obj-$(CONFIG_BRIDGE_EBT_ARP) += ebt_arp.o
+obj-$(CONFIG_BRIDGE_EBT_IP) += ebt_ip.o
+obj-$(CONFIG_BRIDGE_EBT_IP6) += ebt_ip6.o
+obj-$(CONFIG_BRIDGE_EBT_LIMIT) += ebt_limit.o
+obj-$(CONFIG_BRIDGE_EBT_MARK) += ebt_mark_m.o
+obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_pkttype.o
+obj-$(CONFIG_BRIDGE_EBT_STP) += ebt_stp.o
+obj-$(CONFIG_BRIDGE_EBT_VLAN) += ebt_vlan.o
+
+# targets
+obj-$(CONFIG_BRIDGE_EBT_ARPREPLY) += ebt_arpreply.o
+obj-$(CONFIG_BRIDGE_EBT_MARK_T) += ebt_mark.o
+obj-$(CONFIG_BRIDGE_EBT_DNAT) += ebt_dnat.o
+obj-$(CONFIG_BRIDGE_EBT_REDIRECT) += ebt_redirect.o
+obj-$(CONFIG_BRIDGE_EBT_SNAT) += ebt_snat.o
+
+# watchers
+obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_log.o
+obj-$(CONFIG_BRIDGE_EBT_NFLOG) += ebt_nflog.o
diff --git a/kernel/net/bridge/netfilter/ebt_802_3.c b/kernel/net/bridge/netfilter/ebt_802_3.c
new file mode 100644
index 000000000..2a449b7ab
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_802_3.c
@@ -0,0 +1,72 @@
+/*
+ * 802_3
+ *
+ * Author:
+ * Chris Vitale csv@bluetail.com
+ *
+ * May 2003
+ *
+ */
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_802_3.h>
+
+static bool
+ebt_802_3_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct ebt_802_3_info *info = par->matchinfo;
+	const struct ebt_802_3_hdr *hdr = ebt_802_3_hdr(skb);
+	__be16 type = hdr->llc.ui.ctrl & IS_UI ? hdr->llc.ui.type : hdr->llc.ni.type;
+
+	if (info->bitmask & EBT_802_3_SAP) {
+		if (FWINV(info->sap != hdr->llc.ui.ssap, EBT_802_3_SAP))
+			return false;
+		if (FWINV(info->sap != hdr->llc.ui.dsap, EBT_802_3_SAP))
+			return false;
+	}
+
+	if (info->bitmask & EBT_802_3_TYPE) {
+		if (!(hdr->llc.ui.dsap == CHECK_TYPE && hdr->llc.ui.ssap == CHECK_TYPE))
+			return false;
+		if (FWINV(info->type != type, EBT_802_3_TYPE))
+			return false;
+	}
+
+	return true;
+}
+
+static int ebt_802_3_mt_check(const struct xt_mtchk_param *par)
+{
+	const struct ebt_802_3_info *info = par->matchinfo;
+
+	if (info->bitmask & ~EBT_802_3_MASK || info->invflags & ~EBT_802_3_MASK)
+		return -EINVAL;
+
+	return 0;
+}
+
+static struct xt_match ebt_802_3_mt_reg __read_mostly = {
+	.name		= "802_3",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_802_3_mt,
+	.checkentry	= ebt_802_3_mt_check,
+	.matchsize	= sizeof(struct ebt_802_3_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_802_3_init(void)
+{
+	return xt_register_match(&ebt_802_3_mt_reg);
+}
+
+static void __exit ebt_802_3_fini(void)
+{
+	xt_unregister_match(&ebt_802_3_mt_reg);
+}
+
+module_init(ebt_802_3_init);
+module_exit(ebt_802_3_fini);
+MODULE_DESCRIPTION("Ebtables: DSAP/SSAP field and SNAP type matching");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_among.c b/kernel/net/bridge/netfilter/ebt_among.c
new file mode 100644
index 000000000..9024283d2
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_among.c
@@ -0,0 +1,229 @@
+/*
+ *  ebt_among
+ *
+ *	Authors:
+ *	Grzegorz Borowiak <grzes@gnu.univ.gda.pl>
+ *
+ *  August, 2003
+ *
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/ip.h>
+#include <linux/if_arp.h>
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_among.h>
+
+static bool ebt_mac_wormhash_contains(const struct ebt_mac_wormhash *wh,
+				      const char *mac, __be32 ip)
+{
+	/* You may be puzzled as to how this code works.
+	 * Some tricks were used, refer to
+	 * 	include/linux/netfilter_bridge/ebt_among.h
+	 * as there you can find a solution of this mystery.
+	 */
+	const struct ebt_mac_wormhash_tuple *p;
+	int start, limit, i;
+	uint32_t cmp[2] = { 0, 0 };
+	int key = ((const unsigned char *)mac)[5];
+
+	ether_addr_copy(((char *) cmp) + 2, mac);
+	start = wh->table[key];
+	limit = wh->table[key + 1];
+	if (ip) {
+		for (i = start; i < limit; i++) {
+			p = &wh->pool[i];
+			if (cmp[1] == p->cmp[1] && cmp[0] == p->cmp[0])
+				if (p->ip == 0 || p->ip == ip)
+					return true;
+		}
+	} else {
+		for (i = start; i < limit; i++) {
+			p = &wh->pool[i];
+			if (cmp[1] == p->cmp[1] && cmp[0] == p->cmp[0])
+				if (p->ip == 0)
+					return true;
+		}
+	}
+	return false;
+}
+
+static int ebt_mac_wormhash_check_integrity(const struct ebt_mac_wormhash
+					    *wh)
+{
+	int i;
+
+	for (i = 0; i < 256; i++) {
+		if (wh->table[i] > wh->table[i + 1])
+			return -0x100 - i;
+		if (wh->table[i] < 0)
+			return -0x200 - i;
+		if (wh->table[i] > wh->poolsize)
+			return -0x300 - i;
+	}
+	if (wh->table[256] > wh->poolsize)
+		return -0xc00;
+	return 0;
+}
+
+static int get_ip_dst(const struct sk_buff *skb, __be32 *addr)
+{
+	if (eth_hdr(skb)->h_proto == htons(ETH_P_IP)) {
+		const struct iphdr *ih;
+		struct iphdr _iph;
+
+		ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+		if (ih == NULL)
+			return -1;
+		*addr = ih->daddr;
+	} else if (eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) {
+		const struct arphdr *ah;
+		struct arphdr _arph;
+		const __be32 *bp;
+		__be32 buf;
+
+		ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
+		if (ah == NULL ||
+		    ah->ar_pln != sizeof(__be32) ||
+		    ah->ar_hln != ETH_ALEN)
+			return -1;
+		bp = skb_header_pointer(skb, sizeof(struct arphdr) +
+					2 * ETH_ALEN + sizeof(__be32),
+					sizeof(__be32), &buf);
+		if (bp == NULL)
+			return -1;
+		*addr = *bp;
+	}
+	return 0;
+}
+
+static int get_ip_src(const struct sk_buff *skb, __be32 *addr)
+{
+	if (eth_hdr(skb)->h_proto == htons(ETH_P_IP)) {
+		const struct iphdr *ih;
+		struct iphdr _iph;
+
+		ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+		if (ih == NULL)
+			return -1;
+		*addr = ih->saddr;
+	} else if (eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) {
+		const struct arphdr *ah;
+		struct arphdr _arph;
+		const __be32 *bp;
+		__be32 buf;
+
+		ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
+		if (ah == NULL ||
+		    ah->ar_pln != sizeof(__be32) ||
+		    ah->ar_hln != ETH_ALEN)
+			return -1;
+		bp = skb_header_pointer(skb, sizeof(struct arphdr) +
+					ETH_ALEN, sizeof(__be32), &buf);
+		if (bp == NULL)
+			return -1;
+		*addr = *bp;
+	}
+	return 0;
+}
+
+static bool
+ebt_among_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct ebt_among_info *info = par->matchinfo;
+	const char *dmac, *smac;
+	const struct ebt_mac_wormhash *wh_dst, *wh_src;
+	__be32 dip = 0, sip = 0;
+
+	wh_dst = ebt_among_wh_dst(info);
+	wh_src = ebt_among_wh_src(info);
+
+	if (wh_src) {
+		smac = eth_hdr(skb)->h_source;
+		if (get_ip_src(skb, &sip))
+			return false;
+		if (!(info->bitmask & EBT_AMONG_SRC_NEG)) {
+			/* we match only if it contains */
+			if (!ebt_mac_wormhash_contains(wh_src, smac, sip))
+				return false;
+		} else {
+			/* we match only if it DOES NOT contain */
+			if (ebt_mac_wormhash_contains(wh_src, smac, sip))
+				return false;
+		}
+	}
+
+	if (wh_dst) {
+		dmac = eth_hdr(skb)->h_dest;
+		if (get_ip_dst(skb, &dip))
+			return false;
+		if (!(info->bitmask & EBT_AMONG_DST_NEG)) {
+			/* we match only if it contains */
+			if (!ebt_mac_wormhash_contains(wh_dst, dmac, dip))
+				return false;
+		} else {
+			/* we match only if it DOES NOT contain */
+			if (ebt_mac_wormhash_contains(wh_dst, dmac, dip))
+				return false;
+		}
+	}
+
+	return true;
+}
+
+static int ebt_among_mt_check(const struct xt_mtchk_param *par)
+{
+	const struct ebt_among_info *info = par->matchinfo;
+	const struct ebt_entry_match *em =
+		container_of(par->matchinfo, const struct ebt_entry_match, data);
+	int expected_length = sizeof(struct ebt_among_info);
+	const struct ebt_mac_wormhash *wh_dst, *wh_src;
+	int err;
+
+	wh_dst = ebt_among_wh_dst(info);
+	wh_src = ebt_among_wh_src(info);
+	expected_length += ebt_mac_wormhash_size(wh_dst);
+	expected_length += ebt_mac_wormhash_size(wh_src);
+
+	if (em->match_size != EBT_ALIGN(expected_length)) {
+		pr_info("wrong size: %d against expected %d, rounded to %Zd\n",
+			em->match_size, expected_length,
+			EBT_ALIGN(expected_length));
+		return -EINVAL;
+	}
+	if (wh_dst && (err = ebt_mac_wormhash_check_integrity(wh_dst))) {
+		pr_info("dst integrity fail: %x\n", -err);
+		return -EINVAL;
+	}
+	if (wh_src && (err = ebt_mac_wormhash_check_integrity(wh_src))) {
+		pr_info("src integrity fail: %x\n", -err);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static struct xt_match ebt_among_mt_reg __read_mostly = {
+	.name		= "among",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_among_mt,
+	.checkentry	= ebt_among_mt_check,
+	.matchsize	= -1, /* special case */
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_among_init(void)
+{
+	return xt_register_match(&ebt_among_mt_reg);
+}
+
+static void __exit ebt_among_fini(void)
+{
+	xt_unregister_match(&ebt_among_mt_reg);
+}
+
+module_init(ebt_among_init);
+module_exit(ebt_among_fini);
+MODULE_DESCRIPTION("Ebtables: Combined MAC/IP address list matching");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_arp.c b/kernel/net/bridge/netfilter/ebt_arp.c
new file mode 100644
index 000000000..cd457b891
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_arp.c
@@ -0,0 +1,140 @@
+/*
+ *  ebt_arp
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *	Tim Gardner <timg@tpi.com>
+ *
+ *  April, 2002
+ *
+ */
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_arp.h>
+
+static bool
+ebt_arp_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct ebt_arp_info *info = par->matchinfo;
+	const struct arphdr *ah;
+	struct arphdr _arph;
+
+	ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
+	if (ah == NULL)
+		return false;
+	if (info->bitmask & EBT_ARP_OPCODE && FWINV(info->opcode !=
+	   ah->ar_op, EBT_ARP_OPCODE))
+		return false;
+	if (info->bitmask & EBT_ARP_HTYPE && FWINV(info->htype !=
+	   ah->ar_hrd, EBT_ARP_HTYPE))
+		return false;
+	if (info->bitmask & EBT_ARP_PTYPE && FWINV(info->ptype !=
+	   ah->ar_pro, EBT_ARP_PTYPE))
+		return false;
+
+	if (info->bitmask & (EBT_ARP_SRC_IP | EBT_ARP_DST_IP | EBT_ARP_GRAT)) {
+		const __be32 *sap, *dap;
+		__be32 saddr, daddr;
+
+		if (ah->ar_pln != sizeof(__be32) || ah->ar_pro != htons(ETH_P_IP))
+			return false;
+		sap = skb_header_pointer(skb, sizeof(struct arphdr) +
+					ah->ar_hln, sizeof(saddr),
+					&saddr);
+		if (sap == NULL)
+			return false;
+		dap = skb_header_pointer(skb, sizeof(struct arphdr) +
+					2*ah->ar_hln+sizeof(saddr),
+					sizeof(daddr), &daddr);
+		if (dap == NULL)
+			return false;
+		if (info->bitmask & EBT_ARP_SRC_IP &&
+		    FWINV(info->saddr != (*sap & info->smsk), EBT_ARP_SRC_IP))
+			return false;
+		if (info->bitmask & EBT_ARP_DST_IP &&
+		    FWINV(info->daddr != (*dap & info->dmsk), EBT_ARP_DST_IP))
+			return false;
+		if (info->bitmask & EBT_ARP_GRAT &&
+		    FWINV(*dap != *sap, EBT_ARP_GRAT))
+			return false;
+	}
+
+	if (info->bitmask & (EBT_ARP_SRC_MAC | EBT_ARP_DST_MAC)) {
+		const unsigned char *mp;
+		unsigned char _mac[ETH_ALEN];
+		uint8_t verdict, i;
+
+		if (ah->ar_hln != ETH_ALEN || ah->ar_hrd != htons(ARPHRD_ETHER))
+			return false;
+		if (info->bitmask & EBT_ARP_SRC_MAC) {
+			mp = skb_header_pointer(skb, sizeof(struct arphdr),
+						sizeof(_mac), &_mac);
+			if (mp == NULL)
+				return false;
+			verdict = 0;
+			for (i = 0; i < 6; i++)
+				verdict |= (mp[i] ^ info->smaddr[i]) &
+				       info->smmsk[i];
+			if (FWINV(verdict != 0, EBT_ARP_SRC_MAC))
+				return false;
+		}
+
+		if (info->bitmask & EBT_ARP_DST_MAC) {
+			mp = skb_header_pointer(skb, sizeof(struct arphdr) +
+						ah->ar_hln + ah->ar_pln,
+						sizeof(_mac), &_mac);
+			if (mp == NULL)
+				return false;
+			verdict = 0;
+			for (i = 0; i < 6; i++)
+				verdict |= (mp[i] ^ info->dmaddr[i]) &
+					info->dmmsk[i];
+			if (FWINV(verdict != 0, EBT_ARP_DST_MAC))
+				return false;
+		}
+	}
+
+	return true;
+}
+
+static int ebt_arp_mt_check(const struct xt_mtchk_param *par)
+{
+	const struct ebt_arp_info *info = par->matchinfo;
+	const struct ebt_entry *e = par->entryinfo;
+
+	if ((e->ethproto != htons(ETH_P_ARP) &&
+	   e->ethproto != htons(ETH_P_RARP)) ||
+	   e->invflags & EBT_IPROTO)
+		return -EINVAL;
+	if (info->bitmask & ~EBT_ARP_MASK || info->invflags & ~EBT_ARP_MASK)
+		return -EINVAL;
+	return 0;
+}
+
+static struct xt_match ebt_arp_mt_reg __read_mostly = {
+	.name		= "arp",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_arp_mt,
+	.checkentry	= ebt_arp_mt_check,
+	.matchsize	= sizeof(struct ebt_arp_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_arp_init(void)
+{
+	return xt_register_match(&ebt_arp_mt_reg);
+}
+
+static void __exit ebt_arp_fini(void)
+{
+	xt_unregister_match(&ebt_arp_mt_reg);
+}
+
+module_init(ebt_arp_init);
+module_exit(ebt_arp_fini);
+MODULE_DESCRIPTION("Ebtables: ARP protocol packet match");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_arpreply.c b/kernel/net/bridge/netfilter/ebt_arpreply.c
new file mode 100644
index 000000000..070cf134a
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_arpreply.c
@@ -0,0 +1,98 @@
+/*
+ *  ebt_arpreply
+ *
+ *	Authors:
+ *	Grzegorz Borowiak <grzes@gnu.univ.gda.pl>
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  August, 2003
+ *
+ */
+#include <linux/if_arp.h>
+#include <net/arp.h>
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_arpreply.h>
+
+static unsigned int
+ebt_arpreply_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+	const struct ebt_arpreply_info *info = par->targinfo;
+	const __be32 *siptr, *diptr;
+	__be32 _sip, _dip;
+	const struct arphdr *ap;
+	struct arphdr _ah;
+	const unsigned char *shp;
+	unsigned char _sha[ETH_ALEN];
+
+	ap = skb_header_pointer(skb, 0, sizeof(_ah), &_ah);
+	if (ap == NULL)
+		return EBT_DROP;
+
+	if (ap->ar_op != htons(ARPOP_REQUEST) ||
+	    ap->ar_hln != ETH_ALEN ||
+	    ap->ar_pro != htons(ETH_P_IP) ||
+	    ap->ar_pln != 4)
+		return EBT_CONTINUE;
+
+	shp = skb_header_pointer(skb, sizeof(_ah), ETH_ALEN, &_sha);
+	if (shp == NULL)
+		return EBT_DROP;
+
+	siptr = skb_header_pointer(skb, sizeof(_ah) + ETH_ALEN,
+				   sizeof(_sip), &_sip);
+	if (siptr == NULL)
+		return EBT_DROP;
+
+	diptr = skb_header_pointer(skb,
+				   sizeof(_ah) + 2 * ETH_ALEN + sizeof(_sip),
+				   sizeof(_dip), &_dip);
+	if (diptr == NULL)
+		return EBT_DROP;
+
+	arp_send(ARPOP_REPLY, ETH_P_ARP, *siptr, (struct net_device *)par->in,
+		 *diptr, shp, info->mac, shp);
+
+	return info->target;
+}
+
+static int ebt_arpreply_tg_check(const struct xt_tgchk_param *par)
+{
+	const struct ebt_arpreply_info *info = par->targinfo;
+	const struct ebt_entry *e = par->entryinfo;
+
+	if (BASE_CHAIN && info->target == EBT_RETURN)
+		return -EINVAL;
+	if (e->ethproto != htons(ETH_P_ARP) ||
+	    e->invflags & EBT_IPROTO)
+		return -EINVAL;
+	return 0;
+}
+
+static struct xt_target ebt_arpreply_tg_reg __read_mostly = {
+	.name		= "arpreply",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.table		= "nat",
+	.hooks		= (1 << NF_BR_NUMHOOKS) | (1 << NF_BR_PRE_ROUTING),
+	.target		= ebt_arpreply_tg,
+	.checkentry	= ebt_arpreply_tg_check,
+	.targetsize	= sizeof(struct ebt_arpreply_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_arpreply_init(void)
+{
+	return xt_register_target(&ebt_arpreply_tg_reg);
+}
+
+static void __exit ebt_arpreply_fini(void)
+{
+	xt_unregister_target(&ebt_arpreply_tg_reg);
+}
+
+module_init(ebt_arpreply_init);
+module_exit(ebt_arpreply_fini);
+MODULE_DESCRIPTION("Ebtables: ARP reply target");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_dnat.c b/kernel/net/bridge/netfilter/ebt_dnat.c
new file mode 100644
index 000000000..4e0b0c359
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_dnat.c
@@ -0,0 +1,74 @@
+/*
+ *  ebt_dnat
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  June, 2002
+ *
+ */
+#include <linux/module.h>
+#include <net/sock.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_nat.h>
+
+static unsigned int
+ebt_dnat_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+	const struct ebt_nat_info *info = par->targinfo;
+
+	if (!skb_make_writable(skb, 0))
+		return EBT_DROP;
+
+	ether_addr_copy(eth_hdr(skb)->h_dest, info->mac);
+	return info->target;
+}
+
+static int ebt_dnat_tg_check(const struct xt_tgchk_param *par)
+{
+	const struct ebt_nat_info *info = par->targinfo;
+	unsigned int hook_mask;
+
+	if (BASE_CHAIN && info->target == EBT_RETURN)
+		return -EINVAL;
+
+	hook_mask = par->hook_mask & ~(1 << NF_BR_NUMHOOKS);
+	if ((strcmp(par->table, "nat") != 0 ||
+	    (hook_mask & ~((1 << NF_BR_PRE_ROUTING) |
+	    (1 << NF_BR_LOCAL_OUT)))) &&
+	    (strcmp(par->table, "broute") != 0 ||
+	    hook_mask & ~(1 << NF_BR_BROUTING)))
+		return -EINVAL;
+	if (INVALID_TARGET)
+		return -EINVAL;
+	return 0;
+}
+
+static struct xt_target ebt_dnat_tg_reg __read_mostly = {
+	.name		= "dnat",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.hooks		= (1 << NF_BR_NUMHOOKS) | (1 << NF_BR_PRE_ROUTING) |
+			  (1 << NF_BR_LOCAL_OUT) | (1 << NF_BR_BROUTING),
+	.target		= ebt_dnat_tg,
+	.checkentry	= ebt_dnat_tg_check,
+	.targetsize	= sizeof(struct ebt_nat_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_dnat_init(void)
+{
+	return xt_register_target(&ebt_dnat_tg_reg);
+}
+
+static void __exit ebt_dnat_fini(void)
+{
+	xt_unregister_target(&ebt_dnat_tg_reg);
+}
+
+module_init(ebt_dnat_init);
+module_exit(ebt_dnat_fini);
+MODULE_DESCRIPTION("Ebtables: Destination MAC address translation");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_ip.c b/kernel/net/bridge/netfilter/ebt_ip.c
new file mode 100644
index 000000000..23bca62d5
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_ip.c
@@ -0,0 +1,130 @@
+/*
+ *  ebt_ip
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ *  Changes:
+ *    added ip-sport and ip-dport
+ *    Innominate Security Technologies AG <mhopf@innominate.com>
+ *    September, 2002
+ */
+#include <linux/ip.h>
+#include <net/ip.h>
+#include <linux/in.h>
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_ip.h>
+
+struct tcpudphdr {
+	__be16 src;
+	__be16 dst;
+};
+
+static bool
+ebt_ip_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct ebt_ip_info *info = par->matchinfo;
+	const struct iphdr *ih;
+	struct iphdr _iph;
+	const struct tcpudphdr *pptr;
+	struct tcpudphdr _ports;
+
+	ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+	if (ih == NULL)
+		return false;
+	if (info->bitmask & EBT_IP_TOS &&
+	   FWINV(info->tos != ih->tos, EBT_IP_TOS))
+		return false;
+	if (info->bitmask & EBT_IP_SOURCE &&
+	   FWINV((ih->saddr & info->smsk) !=
+	   info->saddr, EBT_IP_SOURCE))
+		return false;
+	if ((info->bitmask & EBT_IP_DEST) &&
+	   FWINV((ih->daddr & info->dmsk) !=
+	   info->daddr, EBT_IP_DEST))
+		return false;
+	if (info->bitmask & EBT_IP_PROTO) {
+		if (FWINV(info->protocol != ih->protocol, EBT_IP_PROTO))
+			return false;
+		if (!(info->bitmask & EBT_IP_DPORT) &&
+		    !(info->bitmask & EBT_IP_SPORT))
+			return true;
+		if (ntohs(ih->frag_off) & IP_OFFSET)
+			return false;
+		pptr = skb_header_pointer(skb, ih->ihl*4,
+					  sizeof(_ports), &_ports);
+		if (pptr == NULL)
+			return false;
+		if (info->bitmask & EBT_IP_DPORT) {
+			u32 dst = ntohs(pptr->dst);
+			if (FWINV(dst < info->dport[0] ||
+				  dst > info->dport[1],
+				  EBT_IP_DPORT))
+			return false;
+		}
+		if (info->bitmask & EBT_IP_SPORT) {
+			u32 src = ntohs(pptr->src);
+			if (FWINV(src < info->sport[0] ||
+				  src > info->sport[1],
+				  EBT_IP_SPORT))
+			return false;
+		}
+	}
+	return true;
+}
+
+static int ebt_ip_mt_check(const struct xt_mtchk_param *par)
+{
+	const struct ebt_ip_info *info = par->matchinfo;
+	const struct ebt_entry *e = par->entryinfo;
+
+	if (e->ethproto != htons(ETH_P_IP) ||
+	   e->invflags & EBT_IPROTO)
+		return -EINVAL;
+	if (info->bitmask & ~EBT_IP_MASK || info->invflags & ~EBT_IP_MASK)
+		return -EINVAL;
+	if (info->bitmask & (EBT_IP_DPORT | EBT_IP_SPORT)) {
+		if (info->invflags & EBT_IP_PROTO)
+			return -EINVAL;
+		if (info->protocol != IPPROTO_TCP &&
+		    info->protocol != IPPROTO_UDP &&
+		    info->protocol != IPPROTO_UDPLITE &&
+		    info->protocol != IPPROTO_SCTP &&
+		    info->protocol != IPPROTO_DCCP)
+			 return -EINVAL;
+	}
+	if (info->bitmask & EBT_IP_DPORT && info->dport[0] > info->dport[1])
+		return -EINVAL;
+	if (info->bitmask & EBT_IP_SPORT && info->sport[0] > info->sport[1])
+		return -EINVAL;
+	return 0;
+}
+
+static struct xt_match ebt_ip_mt_reg __read_mostly = {
+	.name		= "ip",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_ip_mt,
+	.checkentry	= ebt_ip_mt_check,
+	.matchsize	= sizeof(struct ebt_ip_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_ip_init(void)
+{
+	return xt_register_match(&ebt_ip_mt_reg);
+}
+
+static void __exit ebt_ip_fini(void)
+{
+	xt_unregister_match(&ebt_ip_mt_reg);
+}
+
+module_init(ebt_ip_init);
+module_exit(ebt_ip_fini);
+MODULE_DESCRIPTION("Ebtables: IPv4 protocol packet match");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_ip6.c b/kernel/net/bridge/netfilter/ebt_ip6.c
new file mode 100644
index 000000000..17fd5f2cb
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_ip6.c
@@ -0,0 +1,158 @@
+/*
+ *  ebt_ip6
+ *
+ *	Authors:
+ *	Manohar Castelino <manohar.r.castelino@intel.com>
+ *	Kuo-Lang Tseng <kuo-lang.tseng@intel.com>
+ *	Jan Engelhardt <jengelh@medozas.de>
+ *
+ * Summary:
+ * This is just a modification of the IPv4 code written by
+ * Bart De Schuymer <bdschuym@pandora.be>
+ * with the changes required to support IPv6
+ *
+ *  Jan, 2008
+ */
+#include <linux/ipv6.h>
+#include <net/ipv6.h>
+#include <linux/in.h>
+#include <linux/module.h>
+#include <net/dsfield.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_ip6.h>
+
+union pkthdr {
+	struct {
+		__be16 src;
+		__be16 dst;
+	} tcpudphdr;
+	struct {
+		u8 type;
+		u8 code;
+	} icmphdr;
+};
+
+static bool
+ebt_ip6_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct ebt_ip6_info *info = par->matchinfo;
+	const struct ipv6hdr *ih6;
+	struct ipv6hdr _ip6h;
+	const union pkthdr *pptr;
+	union pkthdr _pkthdr;
+
+	ih6 = skb_header_pointer(skb, 0, sizeof(_ip6h), &_ip6h);
+	if (ih6 == NULL)
+		return false;
+	if (info->bitmask & EBT_IP6_TCLASS &&
+	   FWINV(info->tclass != ipv6_get_dsfield(ih6), EBT_IP6_TCLASS))
+		return false;
+	if ((info->bitmask & EBT_IP6_SOURCE &&
+	    FWINV(ipv6_masked_addr_cmp(&ih6->saddr, &info->smsk,
+				       &info->saddr), EBT_IP6_SOURCE)) ||
+	    (info->bitmask & EBT_IP6_DEST &&
+	    FWINV(ipv6_masked_addr_cmp(&ih6->daddr, &info->dmsk,
+				       &info->daddr), EBT_IP6_DEST)))
+		return false;
+	if (info->bitmask & EBT_IP6_PROTO) {
+		uint8_t nexthdr = ih6->nexthdr;
+		__be16 frag_off;
+		int offset_ph;
+
+		offset_ph = ipv6_skip_exthdr(skb, sizeof(_ip6h), &nexthdr, &frag_off);
+		if (offset_ph == -1)
+			return false;
+		if (FWINV(info->protocol != nexthdr, EBT_IP6_PROTO))
+			return false;
+		if (!(info->bitmask & ( EBT_IP6_DPORT |
+					EBT_IP6_SPORT | EBT_IP6_ICMP6)))
+			return true;
+
+		/* min icmpv6 headersize is 4, so sizeof(_pkthdr) is ok. */
+		pptr = skb_header_pointer(skb, offset_ph, sizeof(_pkthdr),
+					  &_pkthdr);
+		if (pptr == NULL)
+			return false;
+		if (info->bitmask & EBT_IP6_DPORT) {
+			u16 dst = ntohs(pptr->tcpudphdr.dst);
+			if (FWINV(dst < info->dport[0] ||
+				  dst > info->dport[1], EBT_IP6_DPORT))
+				return false;
+		}
+		if (info->bitmask & EBT_IP6_SPORT) {
+			u16 src = ntohs(pptr->tcpudphdr.src);
+			if (FWINV(src < info->sport[0] ||
+				  src > info->sport[1], EBT_IP6_SPORT))
+			return false;
+		}
+		if ((info->bitmask & EBT_IP6_ICMP6) &&
+		     FWINV(pptr->icmphdr.type < info->icmpv6_type[0] ||
+			   pptr->icmphdr.type > info->icmpv6_type[1] ||
+			   pptr->icmphdr.code < info->icmpv6_code[0] ||
+			   pptr->icmphdr.code > info->icmpv6_code[1],
+							EBT_IP6_ICMP6))
+			return false;
+	}
+	return true;
+}
+
+static int ebt_ip6_mt_check(const struct xt_mtchk_param *par)
+{
+	const struct ebt_entry *e = par->entryinfo;
+	struct ebt_ip6_info *info = par->matchinfo;
+
+	if (e->ethproto != htons(ETH_P_IPV6) || e->invflags & EBT_IPROTO)
+		return -EINVAL;
+	if (info->bitmask & ~EBT_IP6_MASK || info->invflags & ~EBT_IP6_MASK)
+		return -EINVAL;
+	if (info->bitmask & (EBT_IP6_DPORT | EBT_IP6_SPORT)) {
+		if (info->invflags & EBT_IP6_PROTO)
+			return -EINVAL;
+		if (info->protocol != IPPROTO_TCP &&
+		    info->protocol != IPPROTO_UDP &&
+		    info->protocol != IPPROTO_UDPLITE &&
+		    info->protocol != IPPROTO_SCTP &&
+		    info->protocol != IPPROTO_DCCP)
+			return -EINVAL;
+	}
+	if (info->bitmask & EBT_IP6_DPORT && info->dport[0] > info->dport[1])
+		return -EINVAL;
+	if (info->bitmask & EBT_IP6_SPORT && info->sport[0] > info->sport[1])
+		return -EINVAL;
+	if (info->bitmask & EBT_IP6_ICMP6) {
+		if ((info->invflags & EBT_IP6_PROTO) ||
+		     info->protocol != IPPROTO_ICMPV6)
+			return -EINVAL;
+		if (info->icmpv6_type[0] > info->icmpv6_type[1] ||
+		    info->icmpv6_code[0] > info->icmpv6_code[1])
+			return -EINVAL;
+	}
+	return 0;
+}
+
+static struct xt_match ebt_ip6_mt_reg __read_mostly = {
+	.name		= "ip6",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_ip6_mt,
+	.checkentry	= ebt_ip6_mt_check,
+	.matchsize	= sizeof(struct ebt_ip6_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_ip6_init(void)
+{
+	return xt_register_match(&ebt_ip6_mt_reg);
+}
+
+static void __exit ebt_ip6_fini(void)
+{
+	xt_unregister_match(&ebt_ip6_mt_reg);
+}
+
+module_init(ebt_ip6_init);
+module_exit(ebt_ip6_fini);
+MODULE_DESCRIPTION("Ebtables: IPv6 protocol packet match");
+MODULE_AUTHOR("Kuo-Lang Tseng <kuo-lang.tseng@intel.com>");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_limit.c b/kernel/net/bridge/netfilter/ebt_limit.c
new file mode 100644
index 000000000..517e78bef
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_limit.c
@@ -0,0 +1,127 @@
+/*
+ *  ebt_limit
+ *
+ *	Authors:
+ *	Tom Marshall <tommy@home.tig-grr.com>
+ *
+ *	Mostly copied from netfilter's ipt_limit.c, see that file for
+ *	more explanation
+ *
+ *  September, 2003
+ *
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_limit.h>
+
+static DEFINE_SPINLOCK(limit_lock);
+
+#define MAX_CPJ (0xFFFFFFFF / (HZ*60*60*24))
+
+#define _POW2_BELOW2(x) ((x)|((x)>>1))
+#define _POW2_BELOW4(x) (_POW2_BELOW2(x)|_POW2_BELOW2((x)>>2))
+#define _POW2_BELOW8(x) (_POW2_BELOW4(x)|_POW2_BELOW4((x)>>4))
+#define _POW2_BELOW16(x) (_POW2_BELOW8(x)|_POW2_BELOW8((x)>>8))
+#define _POW2_BELOW32(x) (_POW2_BELOW16(x)|_POW2_BELOW16((x)>>16))
+#define POW2_BELOW32(x) ((_POW2_BELOW32(x)>>1) + 1)
+
+#define CREDITS_PER_JIFFY POW2_BELOW32(MAX_CPJ)
+
+static bool
+ebt_limit_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	struct ebt_limit_info *info = (void *)par->matchinfo;
+	unsigned long now = jiffies;
+
+	spin_lock_bh(&limit_lock);
+	info->credit += (now - xchg(&info->prev, now)) * CREDITS_PER_JIFFY;
+	if (info->credit > info->credit_cap)
+		info->credit = info->credit_cap;
+
+	if (info->credit >= info->cost) {
+		/* We're not limited. */
+		info->credit -= info->cost;
+		spin_unlock_bh(&limit_lock);
+		return true;
+	}
+
+	spin_unlock_bh(&limit_lock);
+	return false;
+}
+
+/* Precision saver. */
+static u_int32_t
+user2credits(u_int32_t user)
+{
+	/* If multiplying would overflow... */
+	if (user > 0xFFFFFFFF / (HZ*CREDITS_PER_JIFFY))
+		/* Divide first. */
+		return (user / EBT_LIMIT_SCALE) * HZ * CREDITS_PER_JIFFY;
+
+	return (user * HZ * CREDITS_PER_JIFFY) / EBT_LIMIT_SCALE;
+}
+
+static int ebt_limit_mt_check(const struct xt_mtchk_param *par)
+{
+	struct ebt_limit_info *info = par->matchinfo;
+
+	/* Check for overflow. */
+	if (info->burst == 0 ||
+	    user2credits(info->avg * info->burst) < user2credits(info->avg)) {
+		pr_info("overflow, try lower: %u/%u\n",
+			info->avg, info->burst);
+		return -EINVAL;
+	}
+
+	/* User avg in seconds * EBT_LIMIT_SCALE: convert to jiffies * 128. */
+	info->prev = jiffies;
+	info->credit = user2credits(info->avg * info->burst);
+	info->credit_cap = user2credits(info->avg * info->burst);
+	info->cost = user2credits(info->avg);
+	return 0;
+}
+
+
+#ifdef CONFIG_COMPAT
+/*
+ * no conversion function needed --
+ * only avg/burst have meaningful values in userspace.
+ */
+struct ebt_compat_limit_info {
+	compat_uint_t avg, burst;
+	compat_ulong_t prev;
+	compat_uint_t credit, credit_cap, cost;
+};
+#endif
+
+static struct xt_match ebt_limit_mt_reg __read_mostly = {
+	.name		= "limit",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_limit_mt,
+	.checkentry	= ebt_limit_mt_check,
+	.matchsize	= sizeof(struct ebt_limit_info),
+#ifdef CONFIG_COMPAT
+	.compatsize	= sizeof(struct ebt_compat_limit_info),
+#endif
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_limit_init(void)
+{
+	return xt_register_match(&ebt_limit_mt_reg);
+}
+
+static void __exit ebt_limit_fini(void)
+{
+	xt_unregister_match(&ebt_limit_mt_reg);
+}
+
+module_init(ebt_limit_init);
+module_exit(ebt_limit_fini);
+MODULE_DESCRIPTION("Ebtables: Rate-limit match");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_log.c b/kernel/net/bridge/netfilter/ebt_log.c
new file mode 100644
index 000000000..17f2e4bc2
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_log.c
@@ -0,0 +1,225 @@
+/*
+ *  ebt_log
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *	Harald Welte <laforge@netfilter.org>
+ *
+ *  April, 2002
+ *
+ */
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/if_arp.h>
+#include <linux/spinlock.h>
+#include <net/netfilter/nf_log.h>
+#include <linux/ipv6.h>
+#include <net/ipv6.h>
+#include <linux/in6.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_log.h>
+#include <linux/netfilter.h>
+
+static DEFINE_SPINLOCK(ebt_log_lock);
+
+static int ebt_log_tg_check(const struct xt_tgchk_param *par)
+{
+	struct ebt_log_info *info = par->targinfo;
+
+	if (info->bitmask & ~EBT_LOG_MASK)
+		return -EINVAL;
+	if (info->loglevel >= 8)
+		return -EINVAL;
+	info->prefix[EBT_LOG_PREFIX_SIZE - 1] = '\0';
+	return 0;
+}
+
+struct tcpudphdr
+{
+	__be16 src;
+	__be16 dst;
+};
+
+struct arppayload
+{
+	unsigned char mac_src[ETH_ALEN];
+	unsigned char ip_src[4];
+	unsigned char mac_dst[ETH_ALEN];
+	unsigned char ip_dst[4];
+};
+
+static void
+print_ports(const struct sk_buff *skb, uint8_t protocol, int offset)
+{
+	if (protocol == IPPROTO_TCP ||
+	    protocol == IPPROTO_UDP ||
+	    protocol == IPPROTO_UDPLITE ||
+	    protocol == IPPROTO_SCTP ||
+	    protocol == IPPROTO_DCCP) {
+		const struct tcpudphdr *pptr;
+		struct tcpudphdr _ports;
+
+		pptr = skb_header_pointer(skb, offset,
+					  sizeof(_ports), &_ports);
+		if (pptr == NULL) {
+			printk(" INCOMPLETE TCP/UDP header");
+			return;
+		}
+		printk(" SPT=%u DPT=%u", ntohs(pptr->src), ntohs(pptr->dst));
+	}
+}
+
+static void
+ebt_log_packet(struct net *net, u_int8_t pf, unsigned int hooknum,
+	       const struct sk_buff *skb, const struct net_device *in,
+	       const struct net_device *out, const struct nf_loginfo *loginfo,
+	       const char *prefix)
+{
+	unsigned int bitmask;
+
+	/* FIXME: Disabled from containers until syslog ns is supported */
+	if (!net_eq(net, &init_net))
+		return;
+
+	spin_lock_bh(&ebt_log_lock);
+	printk(KERN_SOH "%c%s IN=%s OUT=%s MAC source = %pM MAC dest = %pM proto = 0x%04x",
+	       '0' + loginfo->u.log.level, prefix,
+	       in ? in->name : "", out ? out->name : "",
+	       eth_hdr(skb)->h_source, eth_hdr(skb)->h_dest,
+	       ntohs(eth_hdr(skb)->h_proto));
+
+	if (loginfo->type == NF_LOG_TYPE_LOG)
+		bitmask = loginfo->u.log.logflags;
+	else
+		bitmask = NF_LOG_MASK;
+
+	if ((bitmask & EBT_LOG_IP) && eth_hdr(skb)->h_proto ==
+	   htons(ETH_P_IP)) {
+		const struct iphdr *ih;
+		struct iphdr _iph;
+
+		ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+		if (ih == NULL) {
+			printk(" INCOMPLETE IP header");
+			goto out;
+		}
+		printk(" IP SRC=%pI4 IP DST=%pI4, IP tos=0x%02X, IP proto=%d",
+		       &ih->saddr, &ih->daddr, ih->tos, ih->protocol);
+		print_ports(skb, ih->protocol, ih->ihl*4);
+		goto out;
+	}
+
+#if IS_ENABLED(CONFIG_BRIDGE_EBT_IP6)
+	if ((bitmask & EBT_LOG_IP6) && eth_hdr(skb)->h_proto ==
+	   htons(ETH_P_IPV6)) {
+		const struct ipv6hdr *ih;
+		struct ipv6hdr _iph;
+		uint8_t nexthdr;
+		__be16 frag_off;
+		int offset_ph;
+
+		ih = skb_header_pointer(skb, 0, sizeof(_iph), &_iph);
+		if (ih == NULL) {
+			printk(" INCOMPLETE IPv6 header");
+			goto out;
+		}
+		printk(" IPv6 SRC=%pI6 IPv6 DST=%pI6, IPv6 priority=0x%01X, Next Header=%d",
+		       &ih->saddr, &ih->daddr, ih->priority, ih->nexthdr);
+		nexthdr = ih->nexthdr;
+		offset_ph = ipv6_skip_exthdr(skb, sizeof(_iph), &nexthdr, &frag_off);
+		if (offset_ph == -1)
+			goto out;
+		print_ports(skb, nexthdr, offset_ph);
+		goto out;
+	}
+#endif
+
+	if ((bitmask & EBT_LOG_ARP) &&
+	    ((eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) ||
+	     (eth_hdr(skb)->h_proto == htons(ETH_P_RARP)))) {
+		const struct arphdr *ah;
+		struct arphdr _arph;
+
+		ah = skb_header_pointer(skb, 0, sizeof(_arph), &_arph);
+		if (ah == NULL) {
+			printk(" INCOMPLETE ARP header");
+			goto out;
+		}
+		printk(" ARP HTYPE=%d, PTYPE=0x%04x, OPCODE=%d",
+		       ntohs(ah->ar_hrd), ntohs(ah->ar_pro),
+		       ntohs(ah->ar_op));
+
+		/* If it's for Ethernet and the lengths are OK,
+		 * then log the ARP payload */
+		if (ah->ar_hrd == htons(1) &&
+		    ah->ar_hln == ETH_ALEN &&
+		    ah->ar_pln == sizeof(__be32)) {
+			const struct arppayload *ap;
+			struct arppayload _arpp;
+
+			ap = skb_header_pointer(skb, sizeof(_arph),
+						sizeof(_arpp), &_arpp);
+			if (ap == NULL) {
+				printk(" INCOMPLETE ARP payload");
+				goto out;
+			}
+			printk(" ARP MAC SRC=%pM ARP IP SRC=%pI4 ARP MAC DST=%pM ARP IP DST=%pI4",
+					ap->mac_src, ap->ip_src, ap->mac_dst, ap->ip_dst);
+		}
+	}
+out:
+	printk("\n");
+	spin_unlock_bh(&ebt_log_lock);
+
+}
+
+static unsigned int
+ebt_log_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+	const struct ebt_log_info *info = par->targinfo;
+	struct nf_loginfo li;
+	struct net *net = dev_net(par->in ? par->in : par->out);
+
+	li.type = NF_LOG_TYPE_LOG;
+	li.u.log.level = info->loglevel;
+	li.u.log.logflags = info->bitmask;
+
+	/* Remember that we have to use ebt_log_packet() not to break backward
+	 * compatibility. We cannot use the default bridge packet logger via
+	 * nf_log_packet() with NFT_LOG_TYPE_LOG here. --Pablo
+	 */
+	if (info->bitmask & EBT_LOG_NFLOG)
+		nf_log_packet(net, NFPROTO_BRIDGE, par->hooknum, skb,
+			      par->in, par->out, &li, "%s", info->prefix);
+	else
+		ebt_log_packet(net, NFPROTO_BRIDGE, par->hooknum, skb, par->in,
+			       par->out, &li, info->prefix);
+	return EBT_CONTINUE;
+}
+
+static struct xt_target ebt_log_tg_reg __read_mostly = {
+	.name		= "log",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.target		= ebt_log_tg,
+	.checkentry	= ebt_log_tg_check,
+	.targetsize	= sizeof(struct ebt_log_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_log_init(void)
+{
+	return xt_register_target(&ebt_log_tg_reg);
+}
+
+static void __exit ebt_log_fini(void)
+{
+	xt_unregister_target(&ebt_log_tg_reg);
+}
+
+module_init(ebt_log_init);
+module_exit(ebt_log_fini);
+MODULE_DESCRIPTION("Ebtables: Packet logging to syslog");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_mark.c b/kernel/net/bridge/netfilter/ebt_mark.c
new file mode 100644
index 000000000..66697cbd0
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_mark.c
@@ -0,0 +1,110 @@
+/*
+ *  ebt_mark
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  July, 2002
+ *
+ */
+
+/* The mark target can be used in any chain,
+ * I believe adding a mangle table just for marking is total overkill.
+ * Marking a frame doesn't really change anything in the frame anyway.
+ */
+
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_mark_t.h>
+
+static unsigned int
+ebt_mark_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+	const struct ebt_mark_t_info *info = par->targinfo;
+	int action = info->target & -16;
+
+	if (action == MARK_SET_VALUE)
+		skb->mark = info->mark;
+	else if (action == MARK_OR_VALUE)
+		skb->mark |= info->mark;
+	else if (action == MARK_AND_VALUE)
+		skb->mark &= info->mark;
+	else
+		skb->mark ^= info->mark;
+
+	return info->target | ~EBT_VERDICT_BITS;
+}
+
+static int ebt_mark_tg_check(const struct xt_tgchk_param *par)
+{
+	const struct ebt_mark_t_info *info = par->targinfo;
+	int tmp;
+
+	tmp = info->target | ~EBT_VERDICT_BITS;
+	if (BASE_CHAIN && tmp == EBT_RETURN)
+		return -EINVAL;
+	if (tmp < -NUM_STANDARD_TARGETS || tmp >= 0)
+		return -EINVAL;
+	tmp = info->target & ~EBT_VERDICT_BITS;
+	if (tmp != MARK_SET_VALUE && tmp != MARK_OR_VALUE &&
+	    tmp != MARK_AND_VALUE && tmp != MARK_XOR_VALUE)
+		return -EINVAL;
+	return 0;
+}
+#ifdef CONFIG_COMPAT
+struct compat_ebt_mark_t_info {
+	compat_ulong_t mark;
+	compat_uint_t target;
+};
+
+static void mark_tg_compat_from_user(void *dst, const void *src)
+{
+	const struct compat_ebt_mark_t_info *user = src;
+	struct ebt_mark_t_info *kern = dst;
+
+	kern->mark = user->mark;
+	kern->target = user->target;
+}
+
+static int mark_tg_compat_to_user(void __user *dst, const void *src)
+{
+	struct compat_ebt_mark_t_info __user *user = dst;
+	const struct ebt_mark_t_info *kern = src;
+
+	if (put_user(kern->mark, &user->mark) ||
+	    put_user(kern->target, &user->target))
+		return -EFAULT;
+	return 0;
+}
+#endif
+
+static struct xt_target ebt_mark_tg_reg __read_mostly = {
+	.name		= "mark",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.target		= ebt_mark_tg,
+	.checkentry	= ebt_mark_tg_check,
+	.targetsize	= sizeof(struct ebt_mark_t_info),
+#ifdef CONFIG_COMPAT
+	.compatsize	= sizeof(struct compat_ebt_mark_t_info),
+	.compat_from_user = mark_tg_compat_from_user,
+	.compat_to_user	= mark_tg_compat_to_user,
+#endif
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_mark_init(void)
+{
+	return xt_register_target(&ebt_mark_tg_reg);
+}
+
+static void __exit ebt_mark_fini(void)
+{
+	xt_unregister_target(&ebt_mark_tg_reg);
+}
+
+module_init(ebt_mark_init);
+module_exit(ebt_mark_fini);
+MODULE_DESCRIPTION("Ebtables: Packet mark modification");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_mark_m.c b/kernel/net/bridge/netfilter/ebt_mark_m.c
new file mode 100644
index 000000000..d98baefc4
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_mark_m.c
@@ -0,0 +1,98 @@
+/*
+ *  ebt_mark_m
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  July, 2002
+ *
+ */
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_mark_m.h>
+
+static bool
+ebt_mark_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct ebt_mark_m_info *info = par->matchinfo;
+
+	if (info->bitmask & EBT_MARK_OR)
+		return !!(skb->mark & info->mask) ^ info->invert;
+	return ((skb->mark & info->mask) == info->mark) ^ info->invert;
+}
+
+static int ebt_mark_mt_check(const struct xt_mtchk_param *par)
+{
+	const struct ebt_mark_m_info *info = par->matchinfo;
+
+	if (info->bitmask & ~EBT_MARK_MASK)
+		return -EINVAL;
+	if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND))
+		return -EINVAL;
+	if (!info->bitmask)
+		return -EINVAL;
+	return 0;
+}
+
+
+#ifdef CONFIG_COMPAT
+struct compat_ebt_mark_m_info {
+	compat_ulong_t mark, mask;
+	uint8_t invert, bitmask;
+};
+
+static void mark_mt_compat_from_user(void *dst, const void *src)
+{
+	const struct compat_ebt_mark_m_info *user = src;
+	struct ebt_mark_m_info *kern = dst;
+
+	kern->mark = user->mark;
+	kern->mask = user->mask;
+	kern->invert = user->invert;
+	kern->bitmask = user->bitmask;
+}
+
+static int mark_mt_compat_to_user(void __user *dst, const void *src)
+{
+	struct compat_ebt_mark_m_info __user *user = dst;
+	const struct ebt_mark_m_info *kern = src;
+
+	if (put_user(kern->mark, &user->mark) ||
+	    put_user(kern->mask, &user->mask) ||
+	    put_user(kern->invert, &user->invert) ||
+	    put_user(kern->bitmask, &user->bitmask))
+		return -EFAULT;
+	return 0;
+}
+#endif
+
+static struct xt_match ebt_mark_mt_reg __read_mostly = {
+	.name		= "mark_m",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_mark_mt,
+	.checkentry	= ebt_mark_mt_check,
+	.matchsize	= sizeof(struct ebt_mark_m_info),
+#ifdef CONFIG_COMPAT
+	.compatsize	= sizeof(struct compat_ebt_mark_m_info),
+	.compat_from_user = mark_mt_compat_from_user,
+	.compat_to_user	= mark_mt_compat_to_user,
+#endif
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_mark_m_init(void)
+{
+	return xt_register_match(&ebt_mark_mt_reg);
+}
+
+static void __exit ebt_mark_m_fini(void)
+{
+	xt_unregister_match(&ebt_mark_mt_reg);
+}
+
+module_init(ebt_mark_m_init);
+module_exit(ebt_mark_m_fini);
+MODULE_DESCRIPTION("Ebtables: Packet mark match");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_nflog.c b/kernel/net/bridge/netfilter/ebt_nflog.c
new file mode 100644
index 000000000..59ac79520
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_nflog.c
@@ -0,0 +1,73 @@
+/*
+ * ebt_nflog
+ *
+ *	Author:
+ *	Peter Warasin <peter@endian.com>
+ *
+ *  February, 2008
+ *
+ * Based on:
+ *  xt_NFLOG.c, (C) 2006 by Patrick McHardy <kaber@trash.net>
+ *  ebt_ulog.c, (C) 2004 by Bart De Schuymer <bdschuym@pandora.be>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_nflog.h>
+#include <net/netfilter/nf_log.h>
+
+static unsigned int
+ebt_nflog_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+	const struct ebt_nflog_info *info = par->targinfo;
+	struct nf_loginfo li;
+	struct net *net = dev_net(par->in ? par->in : par->out);
+
+	li.type = NF_LOG_TYPE_ULOG;
+	li.u.ulog.copy_len = info->len;
+	li.u.ulog.group = info->group;
+	li.u.ulog.qthreshold = info->threshold;
+
+	nf_log_packet(net, PF_BRIDGE, par->hooknum, skb, par->in,
+		      par->out, &li, "%s", info->prefix);
+	return EBT_CONTINUE;
+}
+
+static int ebt_nflog_tg_check(const struct xt_tgchk_param *par)
+{
+	struct ebt_nflog_info *info = par->targinfo;
+
+	if (info->flags & ~EBT_NFLOG_MASK)
+		return -EINVAL;
+	info->prefix[EBT_NFLOG_PREFIX_SIZE - 1] = '\0';
+	return 0;
+}
+
+static struct xt_target ebt_nflog_tg_reg __read_mostly = {
+	.name       = "nflog",
+	.revision   = 0,
+	.family     = NFPROTO_BRIDGE,
+	.target     = ebt_nflog_tg,
+	.checkentry = ebt_nflog_tg_check,
+	.targetsize = sizeof(struct ebt_nflog_info),
+	.me         = THIS_MODULE,
+};
+
+static int __init ebt_nflog_init(void)
+{
+	return xt_register_target(&ebt_nflog_tg_reg);
+}
+
+static void __exit ebt_nflog_fini(void)
+{
+	xt_unregister_target(&ebt_nflog_tg_reg);
+}
+
+module_init(ebt_nflog_init);
+module_exit(ebt_nflog_fini);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Peter Warasin <peter@endian.com>");
+MODULE_DESCRIPTION("ebtables NFLOG netfilter logging module");
diff --git a/kernel/net/bridge/netfilter/ebt_pkttype.c b/kernel/net/bridge/netfilter/ebt_pkttype.c
new file mode 100644
index 000000000..496a56515
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_pkttype.c
@@ -0,0 +1,56 @@
+/*
+ *  ebt_pkttype
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2003
+ *
+ */
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_pkttype.h>
+
+static bool
+ebt_pkttype_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct ebt_pkttype_info *info = par->matchinfo;
+
+	return (skb->pkt_type == info->pkt_type) ^ info->invert;
+}
+
+static int ebt_pkttype_mt_check(const struct xt_mtchk_param *par)
+{
+	const struct ebt_pkttype_info *info = par->matchinfo;
+
+	if (info->invert != 0 && info->invert != 1)
+		return -EINVAL;
+	/* Allow any pkt_type value */
+	return 0;
+}
+
+static struct xt_match ebt_pkttype_mt_reg __read_mostly = {
+	.name		= "pkttype",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_pkttype_mt,
+	.checkentry	= ebt_pkttype_mt_check,
+	.matchsize	= sizeof(struct ebt_pkttype_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_pkttype_init(void)
+{
+	return xt_register_match(&ebt_pkttype_mt_reg);
+}
+
+static void __exit ebt_pkttype_fini(void)
+{
+	xt_unregister_match(&ebt_pkttype_mt_reg);
+}
+
+module_init(ebt_pkttype_init);
+module_exit(ebt_pkttype_fini);
+MODULE_DESCRIPTION("Ebtables: Link layer packet type match");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_redirect.c b/kernel/net/bridge/netfilter/ebt_redirect.c
new file mode 100644
index 000000000..203964997
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_redirect.c
@@ -0,0 +1,80 @@
+/*
+ *  ebt_redirect
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ */
+#include <linux/module.h>
+#include <net/sock.h>
+#include "../br_private.h"
+#include <linux/netfilter.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_redirect.h>
+
+static unsigned int
+ebt_redirect_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+	const struct ebt_redirect_info *info = par->targinfo;
+
+	if (!skb_make_writable(skb, 0))
+		return EBT_DROP;
+
+	if (par->hooknum != NF_BR_BROUTING)
+		/* rcu_read_lock()ed by nf_hook_slow */
+		ether_addr_copy(eth_hdr(skb)->h_dest,
+				br_port_get_rcu(par->in)->br->dev->dev_addr);
+	else
+		ether_addr_copy(eth_hdr(skb)->h_dest, par->in->dev_addr);
+	skb->pkt_type = PACKET_HOST;
+	return info->target;
+}
+
+static int ebt_redirect_tg_check(const struct xt_tgchk_param *par)
+{
+	const struct ebt_redirect_info *info = par->targinfo;
+	unsigned int hook_mask;
+
+	if (BASE_CHAIN && info->target == EBT_RETURN)
+		return -EINVAL;
+
+	hook_mask = par->hook_mask & ~(1 << NF_BR_NUMHOOKS);
+	if ((strcmp(par->table, "nat") != 0 ||
+	    hook_mask & ~(1 << NF_BR_PRE_ROUTING)) &&
+	    (strcmp(par->table, "broute") != 0 ||
+	    hook_mask & ~(1 << NF_BR_BROUTING)))
+		return -EINVAL;
+	if (INVALID_TARGET)
+		return -EINVAL;
+	return 0;
+}
+
+static struct xt_target ebt_redirect_tg_reg __read_mostly = {
+	.name		= "redirect",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.hooks		= (1 << NF_BR_NUMHOOKS) | (1 << NF_BR_PRE_ROUTING) |
+			  (1 << NF_BR_BROUTING),
+	.target		= ebt_redirect_tg,
+	.checkentry	= ebt_redirect_tg_check,
+	.targetsize	= sizeof(struct ebt_redirect_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_redirect_init(void)
+{
+	return xt_register_target(&ebt_redirect_tg_reg);
+}
+
+static void __exit ebt_redirect_fini(void)
+{
+	xt_unregister_target(&ebt_redirect_tg_reg);
+}
+
+module_init(ebt_redirect_init);
+module_exit(ebt_redirect_fini);
+MODULE_DESCRIPTION("Ebtables: Packet redirection to localhost");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_snat.c b/kernel/net/bridge/netfilter/ebt_snat.c
new file mode 100644
index 000000000..e56ccd060
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_snat.c
@@ -0,0 +1,87 @@
+/*
+ *  ebt_snat
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  June, 2002
+ *
+ */
+#include <linux/module.h>
+#include <net/sock.h>
+#include <linux/if_arp.h>
+#include <net/arp.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_nat.h>
+
+static unsigned int
+ebt_snat_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+	const struct ebt_nat_info *info = par->targinfo;
+
+	if (!skb_make_writable(skb, 0))
+		return EBT_DROP;
+
+	ether_addr_copy(eth_hdr(skb)->h_source, info->mac);
+	if (!(info->target & NAT_ARP_BIT) &&
+	    eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) {
+		const struct arphdr *ap;
+		struct arphdr _ah;
+
+		ap = skb_header_pointer(skb, 0, sizeof(_ah), &_ah);
+		if (ap == NULL)
+			return EBT_DROP;
+		if (ap->ar_hln != ETH_ALEN)
+			goto out;
+		if (skb_store_bits(skb, sizeof(_ah), info->mac, ETH_ALEN))
+			return EBT_DROP;
+	}
+out:
+	return info->target | ~EBT_VERDICT_BITS;
+}
+
+static int ebt_snat_tg_check(const struct xt_tgchk_param *par)
+{
+	const struct ebt_nat_info *info = par->targinfo;
+	int tmp;
+
+	tmp = info->target | ~EBT_VERDICT_BITS;
+	if (BASE_CHAIN && tmp == EBT_RETURN)
+		return -EINVAL;
+
+	if (tmp < -NUM_STANDARD_TARGETS || tmp >= 0)
+		return -EINVAL;
+	tmp = info->target | EBT_VERDICT_BITS;
+	if ((tmp & ~NAT_ARP_BIT) != ~NAT_ARP_BIT)
+		return -EINVAL;
+	return 0;
+}
+
+static struct xt_target ebt_snat_tg_reg __read_mostly = {
+	.name		= "snat",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.table		= "nat",
+	.hooks		= (1 << NF_BR_NUMHOOKS) | (1 << NF_BR_POST_ROUTING),
+	.target		= ebt_snat_tg,
+	.checkentry	= ebt_snat_tg_check,
+	.targetsize	= sizeof(struct ebt_nat_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_snat_init(void)
+{
+	return xt_register_target(&ebt_snat_tg_reg);
+}
+
+static void __exit ebt_snat_fini(void)
+{
+	xt_unregister_target(&ebt_snat_tg_reg);
+}
+
+module_init(ebt_snat_init);
+module_exit(ebt_snat_fini);
+MODULE_DESCRIPTION("Ebtables: Source MAC address translation");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_stp.c b/kernel/net/bridge/netfilter/ebt_stp.c
new file mode 100644
index 000000000..071d87214
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_stp.c
@@ -0,0 +1,197 @@
+/*
+ *  ebt_stp
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *	Stephen Hemminger <shemminger@osdl.org>
+ *
+ *  July, 2003
+ */
+#include <linux/etherdevice.h>
+#include <linux/module.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_stp.h>
+
+#define BPDU_TYPE_CONFIG 0
+#define BPDU_TYPE_TCN 0x80
+
+struct stp_header {
+	uint8_t dsap;
+	uint8_t ssap;
+	uint8_t ctrl;
+	uint8_t pid;
+	uint8_t vers;
+	uint8_t type;
+};
+
+struct stp_config_pdu {
+	uint8_t flags;
+	uint8_t root[8];
+	uint8_t root_cost[4];
+	uint8_t sender[8];
+	uint8_t port[2];
+	uint8_t msg_age[2];
+	uint8_t max_age[2];
+	uint8_t hello_time[2];
+	uint8_t forward_delay[2];
+};
+
+#define NR16(p) (p[0] << 8 | p[1])
+#define NR32(p) ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3])
+
+static bool ebt_filter_config(const struct ebt_stp_info *info,
+   const struct stp_config_pdu *stpc)
+{
+	const struct ebt_stp_config_info *c;
+	uint16_t v16;
+	uint32_t v32;
+	int verdict, i;
+
+	c = &info->config;
+	if ((info->bitmask & EBT_STP_FLAGS) &&
+	    FWINV(c->flags != stpc->flags, EBT_STP_FLAGS))
+		return false;
+	if (info->bitmask & EBT_STP_ROOTPRIO) {
+		v16 = NR16(stpc->root);
+		if (FWINV(v16 < c->root_priol ||
+		    v16 > c->root_priou, EBT_STP_ROOTPRIO))
+			return false;
+	}
+	if (info->bitmask & EBT_STP_ROOTADDR) {
+		verdict = 0;
+		for (i = 0; i < 6; i++)
+			verdict |= (stpc->root[2+i] ^ c->root_addr[i]) &
+				   c->root_addrmsk[i];
+		if (FWINV(verdict != 0, EBT_STP_ROOTADDR))
+			return false;
+	}
+	if (info->bitmask & EBT_STP_ROOTCOST) {
+		v32 = NR32(stpc->root_cost);
+		if (FWINV(v32 < c->root_costl ||
+		    v32 > c->root_costu, EBT_STP_ROOTCOST))
+			return false;
+	}
+	if (info->bitmask & EBT_STP_SENDERPRIO) {
+		v16 = NR16(stpc->sender);
+		if (FWINV(v16 < c->sender_priol ||
+		    v16 > c->sender_priou, EBT_STP_SENDERPRIO))
+			return false;
+	}
+	if (info->bitmask & EBT_STP_SENDERADDR) {
+		verdict = 0;
+		for (i = 0; i < 6; i++)
+			verdict |= (stpc->sender[2+i] ^ c->sender_addr[i]) &
+				   c->sender_addrmsk[i];
+		if (FWINV(verdict != 0, EBT_STP_SENDERADDR))
+			return false;
+	}
+	if (info->bitmask & EBT_STP_PORT) {
+		v16 = NR16(stpc->port);
+		if (FWINV(v16 < c->portl ||
+		    v16 > c->portu, EBT_STP_PORT))
+			return false;
+	}
+	if (info->bitmask & EBT_STP_MSGAGE) {
+		v16 = NR16(stpc->msg_age);
+		if (FWINV(v16 < c->msg_agel ||
+		    v16 > c->msg_ageu, EBT_STP_MSGAGE))
+			return false;
+	}
+	if (info->bitmask & EBT_STP_MAXAGE) {
+		v16 = NR16(stpc->max_age);
+		if (FWINV(v16 < c->max_agel ||
+		    v16 > c->max_ageu, EBT_STP_MAXAGE))
+			return false;
+	}
+	if (info->bitmask & EBT_STP_HELLOTIME) {
+		v16 = NR16(stpc->hello_time);
+		if (FWINV(v16 < c->hello_timel ||
+		    v16 > c->hello_timeu, EBT_STP_HELLOTIME))
+			return false;
+	}
+	if (info->bitmask & EBT_STP_FWDD) {
+		v16 = NR16(stpc->forward_delay);
+		if (FWINV(v16 < c->forward_delayl ||
+		    v16 > c->forward_delayu, EBT_STP_FWDD))
+			return false;
+	}
+	return true;
+}
+
+static bool
+ebt_stp_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct ebt_stp_info *info = par->matchinfo;
+	const struct stp_header *sp;
+	struct stp_header _stph;
+	const uint8_t header[6] = {0x42, 0x42, 0x03, 0x00, 0x00, 0x00};
+
+	sp = skb_header_pointer(skb, 0, sizeof(_stph), &_stph);
+	if (sp == NULL)
+		return false;
+
+	/* The stp code only considers these */
+	if (memcmp(sp, header, sizeof(header)))
+		return false;
+
+	if (info->bitmask & EBT_STP_TYPE &&
+	    FWINV(info->type != sp->type, EBT_STP_TYPE))
+		return false;
+
+	if (sp->type == BPDU_TYPE_CONFIG &&
+	    info->bitmask & EBT_STP_CONFIG_MASK) {
+		const struct stp_config_pdu *st;
+		struct stp_config_pdu _stpc;
+
+		st = skb_header_pointer(skb, sizeof(_stph),
+					sizeof(_stpc), &_stpc);
+		if (st == NULL)
+			return false;
+		return ebt_filter_config(info, st);
+	}
+	return true;
+}
+
+static int ebt_stp_mt_check(const struct xt_mtchk_param *par)
+{
+	const struct ebt_stp_info *info = par->matchinfo;
+	const uint8_t bridge_ula[6] = {0x01, 0x80, 0xc2, 0x00, 0x00, 0x00};
+	const uint8_t msk[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+	const struct ebt_entry *e = par->entryinfo;
+
+	if (info->bitmask & ~EBT_STP_MASK || info->invflags & ~EBT_STP_MASK ||
+	    !(info->bitmask & EBT_STP_MASK))
+		return -EINVAL;
+	/* Make sure the match only receives stp frames */
+	if (!ether_addr_equal(e->destmac, bridge_ula) ||
+	    !ether_addr_equal(e->destmsk, msk) || !(e->bitmask & EBT_DESTMAC))
+		return -EINVAL;
+
+	return 0;
+}
+
+static struct xt_match ebt_stp_mt_reg __read_mostly = {
+	.name		= "stp",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_stp_mt,
+	.checkentry	= ebt_stp_mt_check,
+	.matchsize	= sizeof(struct ebt_stp_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_stp_init(void)
+{
+	return xt_register_match(&ebt_stp_mt_reg);
+}
+
+static void __exit ebt_stp_fini(void)
+{
+	xt_unregister_match(&ebt_stp_mt_reg);
+}
+
+module_init(ebt_stp_init);
+module_exit(ebt_stp_fini);
+MODULE_DESCRIPTION("Ebtables: Spanning Tree Protocol packet match");
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebt_vlan.c b/kernel/net/bridge/netfilter/ebt_vlan.c
new file mode 100644
index 000000000..618568888
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebt_vlan.c
@@ -0,0 +1,180 @@
+/*
+ * Description: EBTables 802.1Q match extension kernelspace module.
+ * Authors: Nick Fedchik <nick@fedchik.org.ua>
+ *          Bart De Schuymer <bdschuym@pandora.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_vlan.h>
+
+#define MODULE_VERS "0.6"
+
+MODULE_AUTHOR("Nick Fedchik <nick@fedchik.org.ua>");
+MODULE_DESCRIPTION("Ebtables: 802.1Q VLAN tag match");
+MODULE_LICENSE("GPL");
+
+#define GET_BITMASK(_BIT_MASK_) info->bitmask & _BIT_MASK_
+#define EXIT_ON_MISMATCH(_MATCH_,_MASK_) {if (!((info->_MATCH_ == _MATCH_)^!!(info->invflags & _MASK_))) return false; }
+
+static bool
+ebt_vlan_mt(const struct sk_buff *skb, struct xt_action_param *par)
+{
+	const struct ebt_vlan_info *info = par->matchinfo;
+
+	unsigned short TCI;	/* Whole TCI, given from parsed frame */
+	unsigned short id;	/* VLAN ID, given from frame TCI */
+	unsigned char prio;	/* user_priority, given from frame TCI */
+	/* VLAN encapsulated Type/Length field, given from orig frame */
+	__be16 encap;
+
+	if (skb_vlan_tag_present(skb)) {
+		TCI = skb_vlan_tag_get(skb);
+		encap = skb->protocol;
+	} else {
+		const struct vlan_hdr *fp;
+		struct vlan_hdr _frame;
+
+		fp = skb_header_pointer(skb, 0, sizeof(_frame), &_frame);
+		if (fp == NULL)
+			return false;
+
+		TCI = ntohs(fp->h_vlan_TCI);
+		encap = fp->h_vlan_encapsulated_proto;
+	}
+
+	/* Tag Control Information (TCI) consists of the following elements:
+	 * - User_priority. The user_priority field is three bits in length,
+	 * interpreted as a binary number.
+	 * - Canonical Format Indicator (CFI). The Canonical Format Indicator
+	 * (CFI) is a single bit flag value. Currently ignored.
+	 * - VLAN Identifier (VID). The VID is encoded as
+	 * an unsigned binary number. */
+	id = TCI & VLAN_VID_MASK;
+	prio = (TCI >> 13) & 0x7;
+
+	/* Checking VLAN Identifier (VID) */
+	if (GET_BITMASK(EBT_VLAN_ID))
+		EXIT_ON_MISMATCH(id, EBT_VLAN_ID);
+
+	/* Checking user_priority */
+	if (GET_BITMASK(EBT_VLAN_PRIO))
+		EXIT_ON_MISMATCH(prio, EBT_VLAN_PRIO);
+
+	/* Checking Encapsulated Proto (Length/Type) field */
+	if (GET_BITMASK(EBT_VLAN_ENCAP))
+		EXIT_ON_MISMATCH(encap, EBT_VLAN_ENCAP);
+
+	return true;
+}
+
+static int ebt_vlan_mt_check(const struct xt_mtchk_param *par)
+{
+	struct ebt_vlan_info *info = par->matchinfo;
+	const struct ebt_entry *e = par->entryinfo;
+
+	/* Is it 802.1Q frame checked? */
+	if (e->ethproto != htons(ETH_P_8021Q)) {
+		pr_debug("passed entry proto %2.4X is not 802.1Q (8100)\n",
+			 ntohs(e->ethproto));
+		return -EINVAL;
+	}
+
+	/* Check for bitmask range
+	 * True if even one bit is out of mask */
+	if (info->bitmask & ~EBT_VLAN_MASK) {
+		pr_debug("bitmask %2X is out of mask (%2X)\n",
+			 info->bitmask, EBT_VLAN_MASK);
+		return -EINVAL;
+	}
+
+	/* Check for inversion flags range */
+	if (info->invflags & ~EBT_VLAN_MASK) {
+		pr_debug("inversion flags %2X is out of mask (%2X)\n",
+			 info->invflags, EBT_VLAN_MASK);
+		return -EINVAL;
+	}
+
+	/* Reserved VLAN ID (VID) values
+	 * -----------------------------
+	 * 0 - The null VLAN ID.
+	 * 1 - The default Port VID (PVID)
+	 * 0x0FFF - Reserved for implementation use.
+	 * if_vlan.h: VLAN_N_VID 4096. */
+	if (GET_BITMASK(EBT_VLAN_ID)) {
+		if (!!info->id) { /* if id!=0 => check vid range */
+			if (info->id > VLAN_N_VID) {
+				pr_debug("id %d is out of range (1-4096)\n",
+					 info->id);
+				return -EINVAL;
+			}
+			/* Note: This is valid VLAN-tagged frame point.
+			 * Any value of user_priority are acceptable,
+			 * but should be ignored according to 802.1Q Std.
+			 * So we just drop the prio flag. */
+			info->bitmask &= ~EBT_VLAN_PRIO;
+		}
+		/* Else, id=0 (null VLAN ID)  => user_priority range (any?) */
+	}
+
+	if (GET_BITMASK(EBT_VLAN_PRIO)) {
+		if ((unsigned char) info->prio > 7) {
+			pr_debug("prio %d is out of range (0-7)\n",
+				 info->prio);
+			return -EINVAL;
+		}
+	}
+	/* Check for encapsulated proto range - it is possible to be
+	 * any value for u_short range.
+	 * if_ether.h:  ETH_ZLEN        60   -  Min. octets in frame sans FCS */
+	if (GET_BITMASK(EBT_VLAN_ENCAP)) {
+		if ((unsigned short) ntohs(info->encap) < ETH_ZLEN) {
+			pr_debug("encap frame length %d is less than "
+				 "minimal\n", ntohs(info->encap));
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static struct xt_match ebt_vlan_mt_reg __read_mostly = {
+	.name		= "vlan",
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
+	.match		= ebt_vlan_mt,
+	.checkentry	= ebt_vlan_mt_check,
+	.matchsize	= sizeof(struct ebt_vlan_info),
+	.me		= THIS_MODULE,
+};
+
+static int __init ebt_vlan_init(void)
+{
+	pr_debug("ebtables 802.1Q extension module v" MODULE_VERS "\n");
+	return xt_register_match(&ebt_vlan_mt_reg);
+}
+
+static void __exit ebt_vlan_fini(void)
+{
+	xt_unregister_match(&ebt_vlan_mt_reg);
+}
+
+module_init(ebt_vlan_init);
+module_exit(ebt_vlan_fini);
diff --git a/kernel/net/bridge/netfilter/ebtable_broute.c b/kernel/net/bridge/netfilter/ebtable_broute.c
new file mode 100644
index 000000000..d2cdf5d6e
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebtable_broute.c
@@ -0,0 +1,100 @@
+/*
+ *  ebtable_broute
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ *  This table lets you choose between routing and bridging for frames
+ *  entering on a bridge enslaved nic. This table is traversed before any
+ *  other ebtables table. See net/bridge/br_input.c.
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+#include <linux/if_bridge.h>
+
+/* EBT_ACCEPT means the frame will be bridged
+ * EBT_DROP means the frame will be routed
+ */
+static struct ebt_entries initial_chain = {
+	.name		= "BROUTING",
+	.policy		= EBT_ACCEPT,
+};
+
+static struct ebt_replace_kernel initial_table = {
+	.name		= "broute",
+	.valid_hooks	= 1 << NF_BR_BROUTING,
+	.entries_size	= sizeof(struct ebt_entries),
+	.hook_entry	= {
+		[NF_BR_BROUTING]	= &initial_chain,
+	},
+	.entries	= (char *)&initial_chain,
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+	if (valid_hooks & ~(1 << NF_BR_BROUTING))
+		return -EINVAL;
+	return 0;
+}
+
+static const struct ebt_table broute_table = {
+	.name		= "broute",
+	.table		= &initial_table,
+	.valid_hooks	= 1 << NF_BR_BROUTING,
+	.check		= check,
+	.me		= THIS_MODULE,
+};
+
+static int ebt_broute(struct sk_buff *skb)
+{
+	int ret;
+
+	ret = ebt_do_table(NF_BR_BROUTING, skb, skb->dev, NULL,
+			   dev_net(skb->dev)->xt.broute_table);
+	if (ret == NF_DROP)
+		return 1; /* route it */
+	return 0; /* bridge it */
+}
+
+static int __net_init broute_net_init(struct net *net)
+{
+	net->xt.broute_table = ebt_register_table(net, &broute_table);
+	return PTR_ERR_OR_ZERO(net->xt.broute_table);
+}
+
+static void __net_exit broute_net_exit(struct net *net)
+{
+	ebt_unregister_table(net, net->xt.broute_table);
+}
+
+static struct pernet_operations broute_net_ops = {
+	.init = broute_net_init,
+	.exit = broute_net_exit,
+};
+
+static int __init ebtable_broute_init(void)
+{
+	int ret;
+
+	ret = register_pernet_subsys(&broute_net_ops);
+	if (ret < 0)
+		return ret;
+	/* see br_input.c */
+	RCU_INIT_POINTER(br_should_route_hook,
+			   (br_should_route_hook_t *)ebt_broute);
+	return 0;
+}
+
+static void __exit ebtable_broute_fini(void)
+{
+	RCU_INIT_POINTER(br_should_route_hook, NULL);
+	synchronize_net();
+	unregister_pernet_subsys(&broute_net_ops);
+}
+
+module_init(ebtable_broute_init);
+module_exit(ebtable_broute_fini);
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebtable_filter.c b/kernel/net/bridge/netfilter/ebtable_filter.c
new file mode 100644
index 000000000..8a3f63b2e
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebtable_filter.c
@@ -0,0 +1,136 @@
+/*
+ *  ebtable_filter
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+
+#define FILTER_VALID_HOOKS ((1 << NF_BR_LOCAL_IN) | (1 << NF_BR_FORWARD) | \
+   (1 << NF_BR_LOCAL_OUT))
+
+static struct ebt_entries initial_chains[] = {
+	{
+		.name	= "INPUT",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "FORWARD",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "OUTPUT",
+		.policy	= EBT_ACCEPT,
+	},
+};
+
+static struct ebt_replace_kernel initial_table = {
+	.name		= "filter",
+	.valid_hooks	= FILTER_VALID_HOOKS,
+	.entries_size	= 3 * sizeof(struct ebt_entries),
+	.hook_entry	= {
+		[NF_BR_LOCAL_IN]	= &initial_chains[0],
+		[NF_BR_FORWARD]		= &initial_chains[1],
+		[NF_BR_LOCAL_OUT]	= &initial_chains[2],
+	},
+	.entries	= (char *)initial_chains,
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+	if (valid_hooks & ~FILTER_VALID_HOOKS)
+		return -EINVAL;
+	return 0;
+}
+
+static const struct ebt_table frame_filter = {
+	.name		= "filter",
+	.table		= &initial_table,
+	.valid_hooks	= FILTER_VALID_HOOKS,
+	.check		= check,
+	.me		= THIS_MODULE,
+};
+
+static unsigned int
+ebt_in_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
+	    const struct nf_hook_state *state)
+{
+	return ebt_do_table(ops->hooknum, skb, state->in, state->out,
+			    dev_net(state->in)->xt.frame_filter);
+}
+
+static unsigned int
+ebt_out_hook(const struct nf_hook_ops *ops, struct sk_buff *skb,
+	     const struct nf_hook_state *state)
+{
+	return ebt_do_table(ops->hooknum, skb, state->in, state->out,
+			    dev_net(state->out)->xt.frame_filter);
+}
+
+static struct nf_hook_ops ebt_ops_filter[] __read_mostly = {
+	{
+		.hook		= ebt_in_hook,
+		.owner		= THIS_MODULE,
+		.pf		= NFPROTO_BRIDGE,
+		.hooknum	= NF_BR_LOCAL_IN,
+		.priority	= NF_BR_PRI_FILTER_BRIDGED,
+	},
+	{
+		.hook		= ebt_in_hook,
+		.owner		= THIS_MODULE,
+		.pf		= NFPROTO_BRIDGE,
+		.hooknum	= NF_BR_FORWARD,
+		.priority	= NF_BR_PRI_FILTER_BRIDGED,
+	},
+	{
+		.hook		= ebt_out_hook,
+		.owner		= THIS_MODULE,
+		.pf		= NFPROTO_BRIDGE,
+		.hooknum	= NF_BR_LOCAL_OUT,
+		.priority	= NF_BR_PRI_FILTER_OTHER,
+	},
+};
+
+static int __net_init frame_filter_net_init(struct net *net)
+{
+	net->xt.frame_filter = ebt_register_table(net, &frame_filter);
+	return PTR_ERR_OR_ZERO(net->xt.frame_filter);
+}
+
+static void __net_exit frame_filter_net_exit(struct net *net)
+{
+	ebt_unregister_table(net, net->xt.frame_filter);
+}
+
+static struct pernet_operations frame_filter_net_ops = {
+	.init = frame_filter_net_init,
+	.exit = frame_filter_net_exit,
+};
+
+static int __init ebtable_filter_init(void)
+{
+	int ret;
+
+	ret = register_pernet_subsys(&frame_filter_net_ops);
+	if (ret < 0)
+		return ret;
+	ret = nf_register_hooks(ebt_ops_filter, ARRAY_SIZE(ebt_ops_filter));
+	if (ret < 0)
+		unregister_pernet_subsys(&frame_filter_net_ops);
+	return ret;
+}
+
+static void __exit ebtable_filter_fini(void)
+{
+	nf_unregister_hooks(ebt_ops_filter, ARRAY_SIZE(ebt_ops_filter));
+	unregister_pernet_subsys(&frame_filter_net_ops);
+}
+
+module_init(ebtable_filter_init);
+module_exit(ebtable_filter_fini);
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebtable_nat.c b/kernel/net/bridge/netfilter/ebtable_nat.c
new file mode 100644
index 000000000..c5ef5b1ab
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebtable_nat.c
@@ -0,0 +1,136 @@
+/*
+ *  ebtable_nat
+ *
+ *	Authors:
+ *	Bart De Schuymer <bdschuym@pandora.be>
+ *
+ *  April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+
+#define NAT_VALID_HOOKS ((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT) | \
+   (1 << NF_BR_POST_ROUTING))
+
+static struct ebt_entries initial_chains[] = {
+	{
+		.name	= "PREROUTING",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "OUTPUT",
+		.policy	= EBT_ACCEPT,
+	},
+	{
+		.name	= "POSTROUTING",
+		.policy	= EBT_ACCEPT,
+	}
+};
+
+static struct ebt_replace_kernel initial_table = {
+	.name		= "nat",
+	.valid_hooks	= NAT_VALID_HOOKS,
+	.entries_size	= 3 * sizeof(struct ebt_entries),
+	.hook_entry	= {
+		[NF_BR_PRE_ROUTING]	= &initial_chains[0],
+		[NF_BR_LOCAL_OUT]	= &initial_chains[1],
+		[NF_BR_POST_ROUTING]	= &initial_chains[2],
+	},
+	.entries	= (char *)initial_chains,
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+	if (valid_hooks & ~NAT_VALID_HOOKS)
+		return -EINVAL;
+	return 0;
+}
+
+static struct ebt_table frame_nat = {
+	.name		= "nat",
+	.table		= &initial_table,
+	.valid_hooks	= NAT_VALID_HOOKS,
+	.check		= check,
+	.me		= THIS_MODULE,
+};
+
+static unsigned int
+ebt_nat_in(const struct nf_hook_ops *ops, struct sk_buff *skb,
+	   const struct nf_hook_state *state)
+{
+	return ebt_do_table(ops->hooknum, skb, state->in, state->out,
+			    dev_net(state->in)->xt.frame_nat);
+}
+
+static unsigned int
+ebt_nat_out(const struct nf_hook_ops *ops, struct sk_buff *skb,
+	    const struct nf_hook_state *state)
+{
+	return ebt_do_table(ops->hooknum, skb, state->in, state->out,
+			    dev_net(state->out)->xt.frame_nat);
+}
+
+static struct nf_hook_ops ebt_ops_nat[] __read_mostly = {
+	{
+		.hook		= ebt_nat_out,
+		.owner		= THIS_MODULE,
+		.pf		= NFPROTO_BRIDGE,
+		.hooknum	= NF_BR_LOCAL_OUT,
+		.priority	= NF_BR_PRI_NAT_DST_OTHER,
+	},
+	{
+		.hook		= ebt_nat_out,
+		.owner		= THIS_MODULE,
+		.pf		= NFPROTO_BRIDGE,
+		.hooknum	= NF_BR_POST_ROUTING,
+		.priority	= NF_BR_PRI_NAT_SRC,
+	},
+	{
+		.hook		= ebt_nat_in,
+		.owner		= THIS_MODULE,
+		.pf		= NFPROTO_BRIDGE,
+		.hooknum	= NF_BR_PRE_ROUTING,
+		.priority	= NF_BR_PRI_NAT_DST_BRIDGED,
+	},
+};
+
+static int __net_init frame_nat_net_init(struct net *net)
+{
+	net->xt.frame_nat = ebt_register_table(net, &frame_nat);
+	return PTR_ERR_OR_ZERO(net->xt.frame_nat);
+}
+
+static void __net_exit frame_nat_net_exit(struct net *net)
+{
+	ebt_unregister_table(net, net->xt.frame_nat);
+}
+
+static struct pernet_operations frame_nat_net_ops = {
+	.init = frame_nat_net_init,
+	.exit = frame_nat_net_exit,
+};
+
+static int __init ebtable_nat_init(void)
+{
+	int ret;
+
+	ret = register_pernet_subsys(&frame_nat_net_ops);
+	if (ret < 0)
+		return ret;
+	ret = nf_register_hooks(ebt_ops_nat, ARRAY_SIZE(ebt_ops_nat));
+	if (ret < 0)
+		unregister_pernet_subsys(&frame_nat_net_ops);
+	return ret;
+}
+
+static void __exit ebtable_nat_fini(void)
+{
+	nf_unregister_hooks(ebt_ops_nat, ARRAY_SIZE(ebt_ops_nat));
+	unregister_pernet_subsys(&frame_nat_net_ops);
+}
+
+module_init(ebtable_nat_init);
+module_exit(ebtable_nat_fini);
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/ebtables.c b/kernel/net/bridge/netfilter/ebtables.c
new file mode 100644
index 000000000..91180a7fc
--- /dev/null
+++ b/kernel/net/bridge/netfilter/ebtables.c
@@ -0,0 +1,2432 @@
+/*
+ *  ebtables
+ *
+ *  Author:
+ *  Bart De Schuymer		<bdschuym@pandora.be>
+ *
+ *  ebtables.c,v 2.0, July, 2002
+ *
+ *  This code is stongly inspired on the iptables code which is
+ *  Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/kmod.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <asm/uaccess.h>
+#include <linux/smp.h>
+#include <linux/cpumask.h>
+#include <linux/audit.h>
+#include <net/sock.h>
+/* needed for logical [in,out]-dev filtering */
+#include "../br_private.h"
+
+#define BUGPRINT(format, args...) printk("kernel msg: ebtables bug: please "\
+					 "report to author: "format, ## args)
+/* #define BUGPRINT(format, args...) */
+
+/*
+ * Each cpu has its own set of counters, so there is no need for write_lock in
+ * the softirq
+ * For reading or updating the counters, the user context needs to
+ * get a write_lock
+ */
+
+/* The size of each set of counters is altered to get cache alignment */
+#define SMP_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1))
+#define COUNTER_OFFSET(n) (SMP_ALIGN(n * sizeof(struct ebt_counter)))
+#define COUNTER_BASE(c, n, cpu) ((struct ebt_counter *)(((char *)c) + \
+   COUNTER_OFFSET(n) * cpu))
+
+
+
+static DEFINE_MUTEX(ebt_mutex);
+
+#ifdef CONFIG_COMPAT
+static void ebt_standard_compat_from_user(void *dst, const void *src)
+{
+	int v = *(compat_int_t *)src;
+
+	if (v >= 0)
+		v += xt_compat_calc_jump(NFPROTO_BRIDGE, v);
+	memcpy(dst, &v, sizeof(v));
+}
+
+static int ebt_standard_compat_to_user(void __user *dst, const void *src)
+{
+	compat_int_t cv = *(int *)src;
+
+	if (cv >= 0)
+		cv -= xt_compat_calc_jump(NFPROTO_BRIDGE, cv);
+	return copy_to_user(dst, &cv, sizeof(cv)) ? -EFAULT : 0;
+}
+#endif
+
+
+static struct xt_target ebt_standard_target = {
+	.name       = "standard",
+	.revision   = 0,
+	.family     = NFPROTO_BRIDGE,
+	.targetsize = sizeof(int),
+#ifdef CONFIG_COMPAT
+	.compatsize = sizeof(compat_int_t),
+	.compat_from_user = ebt_standard_compat_from_user,
+	.compat_to_user =  ebt_standard_compat_to_user,
+#endif
+};
+
+static inline int
+ebt_do_watcher(const struct ebt_entry_watcher *w, struct sk_buff *skb,
+	       struct xt_action_param *par)
+{
+	par->target   = w->u.watcher;
+	par->targinfo = w->data;
+	w->u.watcher->target(skb, par);
+	/* watchers don't give a verdict */
+	return 0;
+}
+
+static inline int
+ebt_do_match(struct ebt_entry_match *m, const struct sk_buff *skb,
+	     struct xt_action_param *par)
+{
+	par->match     = m->u.match;
+	par->matchinfo = m->data;
+	return m->u.match->match(skb, par) ? EBT_MATCH : EBT_NOMATCH;
+}
+
+static inline int
+ebt_dev_check(const char *entry, const struct net_device *device)
+{
+	int i = 0;
+	const char *devname;
+
+	if (*entry == '\0')
+		return 0;
+	if (!device)
+		return 1;
+	devname = device->name;
+	/* 1 is the wildcard token */
+	while (entry[i] != '\0' && entry[i] != 1 && entry[i] == devname[i])
+		i++;
+	return devname[i] != entry[i] && entry[i] != 1;
+}
+
+#define FWINV2(bool, invflg) ((bool) ^ !!(e->invflags & invflg))
+/* process standard matches */
+static inline int
+ebt_basic_match(const struct ebt_entry *e, const struct sk_buff *skb,
+                const struct net_device *in, const struct net_device *out)
+{
+	const struct ethhdr *h = eth_hdr(skb);
+	const struct net_bridge_port *p;
+	__be16 ethproto;
+	int verdict, i;
+
+	if (skb_vlan_tag_present(skb))
+		ethproto = htons(ETH_P_8021Q);
+	else
+		ethproto = h->h_proto;
+
+	if (e->bitmask & EBT_802_3) {
+		if (FWINV2(ntohs(ethproto) >= ETH_P_802_3_MIN, EBT_IPROTO))
+			return 1;
+	} else if (!(e->bitmask & EBT_NOPROTO) &&
+	   FWINV2(e->ethproto != ethproto, EBT_IPROTO))
+		return 1;
+
+	if (FWINV2(ebt_dev_check(e->in, in), EBT_IIN))
+		return 1;
+	if (FWINV2(ebt_dev_check(e->out, out), EBT_IOUT))
+		return 1;
+	/* rcu_read_lock()ed by nf_hook_slow */
+	if (in && (p = br_port_get_rcu(in)) != NULL &&
+	    FWINV2(ebt_dev_check(e->logical_in, p->br->dev), EBT_ILOGICALIN))
+		return 1;
+	if (out && (p = br_port_get_rcu(out)) != NULL &&
+	    FWINV2(ebt_dev_check(e->logical_out, p->br->dev), EBT_ILOGICALOUT))
+		return 1;
+
+	if (e->bitmask & EBT_SOURCEMAC) {
+		verdict = 0;
+		for (i = 0; i < 6; i++)
+			verdict |= (h->h_source[i] ^ e->sourcemac[i]) &
+			   e->sourcemsk[i];
+		if (FWINV2(verdict != 0, EBT_ISOURCE) )
+			return 1;
+	}
+	if (e->bitmask & EBT_DESTMAC) {
+		verdict = 0;
+		for (i = 0; i < 6; i++)
+			verdict |= (h->h_dest[i] ^ e->destmac[i]) &
+			   e->destmsk[i];
+		if (FWINV2(verdict != 0, EBT_IDEST) )
+			return 1;
+	}
+	return 0;
+}
+
+static inline __pure
+struct ebt_entry *ebt_next_entry(const struct ebt_entry *entry)
+{
+	return (void *)entry + entry->next_offset;
+}
+
+/* Do some firewalling */
+unsigned int ebt_do_table (unsigned int hook, struct sk_buff *skb,
+   const struct net_device *in, const struct net_device *out,
+   struct ebt_table *table)
+{
+	int i, nentries;
+	struct ebt_entry *point;
+	struct ebt_counter *counter_base, *cb_base;
+	const struct ebt_entry_target *t;
+	int verdict, sp = 0;
+	struct ebt_chainstack *cs;
+	struct ebt_entries *chaininfo;
+	const char *base;
+	const struct ebt_table_info *private;
+	struct xt_action_param acpar;
+
+	acpar.family  = NFPROTO_BRIDGE;
+	acpar.in      = in;
+	acpar.out     = out;
+	acpar.hotdrop = false;
+	acpar.hooknum = hook;
+
+	read_lock_bh(&table->lock);
+	private = table->private;
+	cb_base = COUNTER_BASE(private->counters, private->nentries,
+	   smp_processor_id());
+	if (private->chainstack)
+		cs = private->chainstack[smp_processor_id()];
+	else
+		cs = NULL;
+	chaininfo = private->hook_entry[hook];
+	nentries = private->hook_entry[hook]->nentries;
+	point = (struct ebt_entry *)(private->hook_entry[hook]->data);
+	counter_base = cb_base + private->hook_entry[hook]->counter_offset;
+	/* base for chain jumps */
+	base = private->entries;
+	i = 0;
+	while (i < nentries) {
+		if (ebt_basic_match(point, skb, in, out))
+			goto letscontinue;
+
+		if (EBT_MATCH_ITERATE(point, ebt_do_match, skb, &acpar) != 0)
+			goto letscontinue;
+		if (acpar.hotdrop) {
+			read_unlock_bh(&table->lock);
+			return NF_DROP;
+		}
+
+		/* increase counter */
+		(*(counter_base + i)).pcnt++;
+		(*(counter_base + i)).bcnt += skb->len;
+
+		/* these should only watch: not modify, nor tell us
+		   what to do with the packet */
+		EBT_WATCHER_ITERATE(point, ebt_do_watcher, skb, &acpar);
+
+		t = (struct ebt_entry_target *)
+		   (((char *)point) + point->target_offset);
+		/* standard target */
+		if (!t->u.target->target)
+			verdict = ((struct ebt_standard_target *)t)->verdict;
+		else {
+			acpar.target   = t->u.target;
+			acpar.targinfo = t->data;
+			verdict = t->u.target->target(skb, &acpar);
+		}
+		if (verdict == EBT_ACCEPT) {
+			read_unlock_bh(&table->lock);
+			return NF_ACCEPT;
+		}
+		if (verdict == EBT_DROP) {
+			read_unlock_bh(&table->lock);
+			return NF_DROP;
+		}
+		if (verdict == EBT_RETURN) {
+letsreturn:
+#ifdef CONFIG_NETFILTER_DEBUG
+			if (sp == 0) {
+				BUGPRINT("RETURN on base chain");
+				/* act like this is EBT_CONTINUE */
+				goto letscontinue;
+			}
+#endif
+			sp--;
+			/* put all the local variables right */
+			i = cs[sp].n;
+			chaininfo = cs[sp].chaininfo;
+			nentries = chaininfo->nentries;
+			point = cs[sp].e;
+			counter_base = cb_base +
+			   chaininfo->counter_offset;
+			continue;
+		}
+		if (verdict == EBT_CONTINUE)
+			goto letscontinue;
+#ifdef CONFIG_NETFILTER_DEBUG
+		if (verdict < 0) {
+			BUGPRINT("bogus standard verdict\n");
+			read_unlock_bh(&table->lock);
+			return NF_DROP;
+		}
+#endif
+		/* jump to a udc */
+		cs[sp].n = i + 1;
+		cs[sp].chaininfo = chaininfo;
+		cs[sp].e = ebt_next_entry(point);
+		i = 0;
+		chaininfo = (struct ebt_entries *) (base + verdict);
+#ifdef CONFIG_NETFILTER_DEBUG
+		if (chaininfo->distinguisher) {
+			BUGPRINT("jump to non-chain\n");
+			read_unlock_bh(&table->lock);
+			return NF_DROP;
+		}
+#endif
+		nentries = chaininfo->nentries;
+		point = (struct ebt_entry *)chaininfo->data;
+		counter_base = cb_base + chaininfo->counter_offset;
+		sp++;
+		continue;
+letscontinue:
+		point = ebt_next_entry(point);
+		i++;
+	}
+
+	/* I actually like this :) */
+	if (chaininfo->policy == EBT_RETURN)
+		goto letsreturn;
+	if (chaininfo->policy == EBT_ACCEPT) {
+		read_unlock_bh(&table->lock);
+		return NF_ACCEPT;
+	}
+	read_unlock_bh(&table->lock);
+	return NF_DROP;
+}
+
+/* If it succeeds, returns element and locks mutex */
+static inline void *
+find_inlist_lock_noload(struct list_head *head, const char *name, int *error,
+   struct mutex *mutex)
+{
+	struct {
+		struct list_head list;
+		char name[EBT_FUNCTION_MAXNAMELEN];
+	} *e;
+
+	mutex_lock(mutex);
+	list_for_each_entry(e, head, list) {
+		if (strcmp(e->name, name) == 0)
+			return e;
+	}
+	*error = -ENOENT;
+	mutex_unlock(mutex);
+	return NULL;
+}
+
+static void *
+find_inlist_lock(struct list_head *head, const char *name, const char *prefix,
+   int *error, struct mutex *mutex)
+{
+	return try_then_request_module(
+			find_inlist_lock_noload(head, name, error, mutex),
+			"%s%s", prefix, name);
+}
+
+static inline struct ebt_table *
+find_table_lock(struct net *net, const char *name, int *error,
+		struct mutex *mutex)
+{
+	return find_inlist_lock(&net->xt.tables[NFPROTO_BRIDGE], name,
+				"ebtable_", error, mutex);
+}
+
+static inline int
+ebt_check_match(struct ebt_entry_match *m, struct xt_mtchk_param *par,
+		unsigned int *cnt)
+{
+	const struct ebt_entry *e = par->entryinfo;
+	struct xt_match *match;
+	size_t left = ((char *)e + e->watchers_offset) - (char *)m;
+	int ret;
+
+	if (left < sizeof(struct ebt_entry_match) ||
+	    left - sizeof(struct ebt_entry_match) < m->match_size)
+		return -EINVAL;
+
+	match = xt_request_find_match(NFPROTO_BRIDGE, m->u.name, 0);
+	if (IS_ERR(match))
+		return PTR_ERR(match);
+	m->u.match = match;
+
+	par->match     = match;
+	par->matchinfo = m->data;
+	ret = xt_check_match(par, m->match_size,
+	      e->ethproto, e->invflags & EBT_IPROTO);
+	if (ret < 0) {
+		module_put(match->me);
+		return ret;
+	}
+
+	(*cnt)++;
+	return 0;
+}
+
+static inline int
+ebt_check_watcher(struct ebt_entry_watcher *w, struct xt_tgchk_param *par,
+		  unsigned int *cnt)
+{
+	const struct ebt_entry *e = par->entryinfo;
+	struct xt_target *watcher;
+	size_t left = ((char *)e + e->target_offset) - (char *)w;
+	int ret;
+
+	if (left < sizeof(struct ebt_entry_watcher) ||
+	   left - sizeof(struct ebt_entry_watcher) < w->watcher_size)
+		return -EINVAL;
+
+	watcher = xt_request_find_target(NFPROTO_BRIDGE, w->u.name, 0);
+	if (IS_ERR(watcher))
+		return PTR_ERR(watcher);
+	w->u.watcher = watcher;
+
+	par->target   = watcher;
+	par->targinfo = w->data;
+	ret = xt_check_target(par, w->watcher_size,
+	      e->ethproto, e->invflags & EBT_IPROTO);
+	if (ret < 0) {
+		module_put(watcher->me);
+		return ret;
+	}
+
+	(*cnt)++;
+	return 0;
+}
+
+static int ebt_verify_pointers(const struct ebt_replace *repl,
+			       struct ebt_table_info *newinfo)
+{
+	unsigned int limit = repl->entries_size;
+	unsigned int valid_hooks = repl->valid_hooks;
+	unsigned int offset = 0;
+	int i;
+
+	for (i = 0; i < NF_BR_NUMHOOKS; i++)
+		newinfo->hook_entry[i] = NULL;
+
+	newinfo->entries_size = repl->entries_size;
+	newinfo->nentries = repl->nentries;
+
+	while (offset < limit) {
+		size_t left = limit - offset;
+		struct ebt_entry *e = (void *)newinfo->entries + offset;
+
+		if (left < sizeof(unsigned int))
+			break;
+
+		for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+			if ((valid_hooks & (1 << i)) == 0)
+				continue;
+			if ((char __user *)repl->hook_entry[i] ==
+			     repl->entries + offset)
+				break;
+		}
+
+		if (i != NF_BR_NUMHOOKS || !(e->bitmask & EBT_ENTRY_OR_ENTRIES)) {
+			if (e->bitmask != 0) {
+				/* we make userspace set this right,
+				   so there is no misunderstanding */
+				BUGPRINT("EBT_ENTRY_OR_ENTRIES shouldn't be set "
+					 "in distinguisher\n");
+				return -EINVAL;
+			}
+			if (i != NF_BR_NUMHOOKS)
+				newinfo->hook_entry[i] = (struct ebt_entries *)e;
+			if (left < sizeof(struct ebt_entries))
+				break;
+			offset += sizeof(struct ebt_entries);
+		} else {
+			if (left < sizeof(struct ebt_entry))
+				break;
+			if (left < e->next_offset)
+				break;
+			if (e->next_offset < sizeof(struct ebt_entry))
+				return -EINVAL;
+			offset += e->next_offset;
+		}
+	}
+	if (offset != limit) {
+		BUGPRINT("entries_size too small\n");
+		return -EINVAL;
+	}
+
+	/* check if all valid hooks have a chain */
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		if (!newinfo->hook_entry[i] &&
+		   (valid_hooks & (1 << i))) {
+			BUGPRINT("Valid hook without chain\n");
+			return -EINVAL;
+		}
+	}
+	return 0;
+}
+
+/*
+ * this one is very careful, as it is the first function
+ * to parse the userspace data
+ */
+static inline int
+ebt_check_entry_size_and_hooks(const struct ebt_entry *e,
+   const struct ebt_table_info *newinfo,
+   unsigned int *n, unsigned int *cnt,
+   unsigned int *totalcnt, unsigned int *udc_cnt)
+{
+	int i;
+
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		if ((void *)e == (void *)newinfo->hook_entry[i])
+			break;
+	}
+	/* beginning of a new chain
+	   if i == NF_BR_NUMHOOKS it must be a user defined chain */
+	if (i != NF_BR_NUMHOOKS || !e->bitmask) {
+		/* this checks if the previous chain has as many entries
+		   as it said it has */
+		if (*n != *cnt) {
+			BUGPRINT("nentries does not equal the nr of entries "
+				 "in the chain\n");
+			return -EINVAL;
+		}
+		if (((struct ebt_entries *)e)->policy != EBT_DROP &&
+		   ((struct ebt_entries *)e)->policy != EBT_ACCEPT) {
+			/* only RETURN from udc */
+			if (i != NF_BR_NUMHOOKS ||
+			   ((struct ebt_entries *)e)->policy != EBT_RETURN) {
+				BUGPRINT("bad policy\n");
+				return -EINVAL;
+			}
+		}
+		if (i == NF_BR_NUMHOOKS) /* it's a user defined chain */
+			(*udc_cnt)++;
+		if (((struct ebt_entries *)e)->counter_offset != *totalcnt) {
+			BUGPRINT("counter_offset != totalcnt");
+			return -EINVAL;
+		}
+		*n = ((struct ebt_entries *)e)->nentries;
+		*cnt = 0;
+		return 0;
+	}
+	/* a plain old entry, heh */
+	if (sizeof(struct ebt_entry) > e->watchers_offset ||
+	   e->watchers_offset > e->target_offset ||
+	   e->target_offset >= e->next_offset) {
+		BUGPRINT("entry offsets not in right order\n");
+		return -EINVAL;
+	}
+	/* this is not checked anywhere else */
+	if (e->next_offset - e->target_offset < sizeof(struct ebt_entry_target)) {
+		BUGPRINT("target size too small\n");
+		return -EINVAL;
+	}
+	(*cnt)++;
+	(*totalcnt)++;
+	return 0;
+}
+
+struct ebt_cl_stack
+{
+	struct ebt_chainstack cs;
+	int from;
+	unsigned int hookmask;
+};
+
+/*
+ * we need these positions to check that the jumps to a different part of the
+ * entries is a jump to the beginning of a new chain.
+ */
+static inline int
+ebt_get_udc_positions(struct ebt_entry *e, struct ebt_table_info *newinfo,
+   unsigned int *n, struct ebt_cl_stack *udc)
+{
+	int i;
+
+	/* we're only interested in chain starts */
+	if (e->bitmask)
+		return 0;
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		if (newinfo->hook_entry[i] == (struct ebt_entries *)e)
+			break;
+	}
+	/* only care about udc */
+	if (i != NF_BR_NUMHOOKS)
+		return 0;
+
+	udc[*n].cs.chaininfo = (struct ebt_entries *)e;
+	/* these initialisations are depended on later in check_chainloops() */
+	udc[*n].cs.n = 0;
+	udc[*n].hookmask = 0;
+
+	(*n)++;
+	return 0;
+}
+
+static inline int
+ebt_cleanup_match(struct ebt_entry_match *m, struct net *net, unsigned int *i)
+{
+	struct xt_mtdtor_param par;
+
+	if (i && (*i)-- == 0)
+		return 1;
+
+	par.net       = net;
+	par.match     = m->u.match;
+	par.matchinfo = m->data;
+	par.family    = NFPROTO_BRIDGE;
+	if (par.match->destroy != NULL)
+		par.match->destroy(&par);
+	module_put(par.match->me);
+	return 0;
+}
+
+static inline int
+ebt_cleanup_watcher(struct ebt_entry_watcher *w, struct net *net, unsigned int *i)
+{
+	struct xt_tgdtor_param par;
+
+	if (i && (*i)-- == 0)
+		return 1;
+
+	par.net      = net;
+	par.target   = w->u.watcher;
+	par.targinfo = w->data;
+	par.family   = NFPROTO_BRIDGE;
+	if (par.target->destroy != NULL)
+		par.target->destroy(&par);
+	module_put(par.target->me);
+	return 0;
+}
+
+static inline int
+ebt_cleanup_entry(struct ebt_entry *e, struct net *net, unsigned int *cnt)
+{
+	struct xt_tgdtor_param par;
+	struct ebt_entry_target *t;
+
+	if (e->bitmask == 0)
+		return 0;
+	/* we're done */
+	if (cnt && (*cnt)-- == 0)
+		return 1;
+	EBT_WATCHER_ITERATE(e, ebt_cleanup_watcher, net, NULL);
+	EBT_MATCH_ITERATE(e, ebt_cleanup_match, net, NULL);
+	t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+
+	par.net      = net;
+	par.target   = t->u.target;
+	par.targinfo = t->data;
+	par.family   = NFPROTO_BRIDGE;
+	if (par.target->destroy != NULL)
+		par.target->destroy(&par);
+	module_put(par.target->me);
+	return 0;
+}
+
+static inline int
+ebt_check_entry(struct ebt_entry *e, struct net *net,
+   const struct ebt_table_info *newinfo,
+   const char *name, unsigned int *cnt,
+   struct ebt_cl_stack *cl_s, unsigned int udc_cnt)
+{
+	struct ebt_entry_target *t;
+	struct xt_target *target;
+	unsigned int i, j, hook = 0, hookmask = 0;
+	size_t gap;
+	int ret;
+	struct xt_mtchk_param mtpar;
+	struct xt_tgchk_param tgpar;
+
+	/* don't mess with the struct ebt_entries */
+	if (e->bitmask == 0)
+		return 0;
+
+	if (e->bitmask & ~EBT_F_MASK) {
+		BUGPRINT("Unknown flag for bitmask\n");
+		return -EINVAL;
+	}
+	if (e->invflags & ~EBT_INV_MASK) {
+		BUGPRINT("Unknown flag for inv bitmask\n");
+		return -EINVAL;
+	}
+	if ( (e->bitmask & EBT_NOPROTO) && (e->bitmask & EBT_802_3) ) {
+		BUGPRINT("NOPROTO & 802_3 not allowed\n");
+		return -EINVAL;
+	}
+	/* what hook do we belong to? */
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		if (!newinfo->hook_entry[i])
+			continue;
+		if ((char *)newinfo->hook_entry[i] < (char *)e)
+			hook = i;
+		else
+			break;
+	}
+	/* (1 << NF_BR_NUMHOOKS) tells the check functions the rule is on
+	   a base chain */
+	if (i < NF_BR_NUMHOOKS)
+		hookmask = (1 << hook) | (1 << NF_BR_NUMHOOKS);
+	else {
+		for (i = 0; i < udc_cnt; i++)
+			if ((char *)(cl_s[i].cs.chaininfo) > (char *)e)
+				break;
+		if (i == 0)
+			hookmask = (1 << hook) | (1 << NF_BR_NUMHOOKS);
+		else
+			hookmask = cl_s[i - 1].hookmask;
+	}
+	i = 0;
+
+	mtpar.net	= tgpar.net       = net;
+	mtpar.table     = tgpar.table     = name;
+	mtpar.entryinfo = tgpar.entryinfo = e;
+	mtpar.hook_mask = tgpar.hook_mask = hookmask;
+	mtpar.family    = tgpar.family    = NFPROTO_BRIDGE;
+	ret = EBT_MATCH_ITERATE(e, ebt_check_match, &mtpar, &i);
+	if (ret != 0)
+		goto cleanup_matches;
+	j = 0;
+	ret = EBT_WATCHER_ITERATE(e, ebt_check_watcher, &tgpar, &j);
+	if (ret != 0)
+		goto cleanup_watchers;
+	t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+	gap = e->next_offset - e->target_offset;
+
+	target = xt_request_find_target(NFPROTO_BRIDGE, t->u.name, 0);
+	if (IS_ERR(target)) {
+		ret = PTR_ERR(target);
+		goto cleanup_watchers;
+	}
+
+	t->u.target = target;
+	if (t->u.target == &ebt_standard_target) {
+		if (gap < sizeof(struct ebt_standard_target)) {
+			BUGPRINT("Standard target size too big\n");
+			ret = -EFAULT;
+			goto cleanup_watchers;
+		}
+		if (((struct ebt_standard_target *)t)->verdict <
+		   -NUM_STANDARD_TARGETS) {
+			BUGPRINT("Invalid standard target\n");
+			ret = -EFAULT;
+			goto cleanup_watchers;
+		}
+	} else if (t->target_size > gap - sizeof(struct ebt_entry_target)) {
+		module_put(t->u.target->me);
+		ret = -EFAULT;
+		goto cleanup_watchers;
+	}
+
+	tgpar.target   = target;
+	tgpar.targinfo = t->data;
+	ret = xt_check_target(&tgpar, t->target_size,
+	      e->ethproto, e->invflags & EBT_IPROTO);
+	if (ret < 0) {
+		module_put(target->me);
+		goto cleanup_watchers;
+	}
+	(*cnt)++;
+	return 0;
+cleanup_watchers:
+	EBT_WATCHER_ITERATE(e, ebt_cleanup_watcher, net, &j);
+cleanup_matches:
+	EBT_MATCH_ITERATE(e, ebt_cleanup_match, net, &i);
+	return ret;
+}
+
+/*
+ * checks for loops and sets the hook mask for udc
+ * the hook mask for udc tells us from which base chains the udc can be
+ * accessed. This mask is a parameter to the check() functions of the extensions
+ */
+static int check_chainloops(const struct ebt_entries *chain, struct ebt_cl_stack *cl_s,
+   unsigned int udc_cnt, unsigned int hooknr, char *base)
+{
+	int i, chain_nr = -1, pos = 0, nentries = chain->nentries, verdict;
+	const struct ebt_entry *e = (struct ebt_entry *)chain->data;
+	const struct ebt_entry_target *t;
+
+	while (pos < nentries || chain_nr != -1) {
+		/* end of udc, go back one 'recursion' step */
+		if (pos == nentries) {
+			/* put back values of the time when this chain was called */
+			e = cl_s[chain_nr].cs.e;
+			if (cl_s[chain_nr].from != -1)
+				nentries =
+				cl_s[cl_s[chain_nr].from].cs.chaininfo->nentries;
+			else
+				nentries = chain->nentries;
+			pos = cl_s[chain_nr].cs.n;
+			/* make sure we won't see a loop that isn't one */
+			cl_s[chain_nr].cs.n = 0;
+			chain_nr = cl_s[chain_nr].from;
+			if (pos == nentries)
+				continue;
+		}
+		t = (struct ebt_entry_target *)
+		   (((char *)e) + e->target_offset);
+		if (strcmp(t->u.name, EBT_STANDARD_TARGET))
+			goto letscontinue;
+		if (e->target_offset + sizeof(struct ebt_standard_target) >
+		   e->next_offset) {
+			BUGPRINT("Standard target size too big\n");
+			return -1;
+		}
+		verdict = ((struct ebt_standard_target *)t)->verdict;
+		if (verdict >= 0) { /* jump to another chain */
+			struct ebt_entries *hlp2 =
+			   (struct ebt_entries *)(base + verdict);
+			for (i = 0; i < udc_cnt; i++)
+				if (hlp2 == cl_s[i].cs.chaininfo)
+					break;
+			/* bad destination or loop */
+			if (i == udc_cnt) {
+				BUGPRINT("bad destination\n");
+				return -1;
+			}
+			if (cl_s[i].cs.n) {
+				BUGPRINT("loop\n");
+				return -1;
+			}
+			if (cl_s[i].hookmask & (1 << hooknr))
+				goto letscontinue;
+			/* this can't be 0, so the loop test is correct */
+			cl_s[i].cs.n = pos + 1;
+			pos = 0;
+			cl_s[i].cs.e = ebt_next_entry(e);
+			e = (struct ebt_entry *)(hlp2->data);
+			nentries = hlp2->nentries;
+			cl_s[i].from = chain_nr;
+			chain_nr = i;
+			/* this udc is accessible from the base chain for hooknr */
+			cl_s[i].hookmask |= (1 << hooknr);
+			continue;
+		}
+letscontinue:
+		e = ebt_next_entry(e);
+		pos++;
+	}
+	return 0;
+}
+
+/* do the parsing of the table/chains/entries/matches/watchers/targets, heh */
+static int translate_table(struct net *net, const char *name,
+			   struct ebt_table_info *newinfo)
+{
+	unsigned int i, j, k, udc_cnt;
+	int ret;
+	struct ebt_cl_stack *cl_s = NULL; /* used in the checking for chain loops */
+
+	i = 0;
+	while (i < NF_BR_NUMHOOKS && !newinfo->hook_entry[i])
+		i++;
+	if (i == NF_BR_NUMHOOKS) {
+		BUGPRINT("No valid hooks specified\n");
+		return -EINVAL;
+	}
+	if (newinfo->hook_entry[i] != (struct ebt_entries *)newinfo->entries) {
+		BUGPRINT("Chains don't start at beginning\n");
+		return -EINVAL;
+	}
+	/* make sure chains are ordered after each other in same order
+	   as their corresponding hooks */
+	for (j = i + 1; j < NF_BR_NUMHOOKS; j++) {
+		if (!newinfo->hook_entry[j])
+			continue;
+		if (newinfo->hook_entry[j] <= newinfo->hook_entry[i]) {
+			BUGPRINT("Hook order must be followed\n");
+			return -EINVAL;
+		}
+		i = j;
+	}
+
+	/* do some early checkings and initialize some things */
+	i = 0; /* holds the expected nr. of entries for the chain */
+	j = 0; /* holds the up to now counted entries for the chain */
+	k = 0; /* holds the total nr. of entries, should equal
+		  newinfo->nentries afterwards */
+	udc_cnt = 0; /* will hold the nr. of user defined chains (udc) */
+	ret = EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+	   ebt_check_entry_size_and_hooks, newinfo,
+	   &i, &j, &k, &udc_cnt);
+
+	if (ret != 0)
+		return ret;
+
+	if (i != j) {
+		BUGPRINT("nentries does not equal the nr of entries in the "
+			 "(last) chain\n");
+		return -EINVAL;
+	}
+	if (k != newinfo->nentries) {
+		BUGPRINT("Total nentries is wrong\n");
+		return -EINVAL;
+	}
+
+	/* get the location of the udc, put them in an array
+	   while we're at it, allocate the chainstack */
+	if (udc_cnt) {
+		/* this will get free'd in do_replace()/ebt_register_table()
+		   if an error occurs */
+		newinfo->chainstack =
+			vmalloc(nr_cpu_ids * sizeof(*(newinfo->chainstack)));
+		if (!newinfo->chainstack)
+			return -ENOMEM;
+		for_each_possible_cpu(i) {
+			newinfo->chainstack[i] =
+			  vmalloc(udc_cnt * sizeof(*(newinfo->chainstack[0])));
+			if (!newinfo->chainstack[i]) {
+				while (i)
+					vfree(newinfo->chainstack[--i]);
+				vfree(newinfo->chainstack);
+				newinfo->chainstack = NULL;
+				return -ENOMEM;
+			}
+		}
+
+		cl_s = vmalloc(udc_cnt * sizeof(*cl_s));
+		if (!cl_s)
+			return -ENOMEM;
+		i = 0; /* the i'th udc */
+		EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+		   ebt_get_udc_positions, newinfo, &i, cl_s);
+		/* sanity check */
+		if (i != udc_cnt) {
+			BUGPRINT("i != udc_cnt\n");
+			vfree(cl_s);
+			return -EFAULT;
+		}
+	}
+
+	/* Check for loops */
+	for (i = 0; i < NF_BR_NUMHOOKS; i++)
+		if (newinfo->hook_entry[i])
+			if (check_chainloops(newinfo->hook_entry[i],
+			   cl_s, udc_cnt, i, newinfo->entries)) {
+				vfree(cl_s);
+				return -EINVAL;
+			}
+
+	/* we now know the following (along with E=mc²):
+	   - the nr of entries in each chain is right
+	   - the size of the allocated space is right
+	   - all valid hooks have a corresponding chain
+	   - there are no loops
+	   - wrong data can still be on the level of a single entry
+	   - could be there are jumps to places that are not the
+	     beginning of a chain. This can only occur in chains that
+	     are not accessible from any base chains, so we don't care. */
+
+	/* used to know what we need to clean up if something goes wrong */
+	i = 0;
+	ret = EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+	   ebt_check_entry, net, newinfo, name, &i, cl_s, udc_cnt);
+	if (ret != 0) {
+		EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+				  ebt_cleanup_entry, net, &i);
+	}
+	vfree(cl_s);
+	return ret;
+}
+
+/* called under write_lock */
+static void get_counters(const struct ebt_counter *oldcounters,
+   struct ebt_counter *counters, unsigned int nentries)
+{
+	int i, cpu;
+	struct ebt_counter *counter_base;
+
+	/* counters of cpu 0 */
+	memcpy(counters, oldcounters,
+	       sizeof(struct ebt_counter) * nentries);
+
+	/* add other counters to those of cpu 0 */
+	for_each_possible_cpu(cpu) {
+		if (cpu == 0)
+			continue;
+		counter_base = COUNTER_BASE(oldcounters, nentries, cpu);
+		for (i = 0; i < nentries; i++) {
+			counters[i].pcnt += counter_base[i].pcnt;
+			counters[i].bcnt += counter_base[i].bcnt;
+		}
+	}
+}
+
+static int do_replace_finish(struct net *net, struct ebt_replace *repl,
+			      struct ebt_table_info *newinfo)
+{
+	int ret, i;
+	struct ebt_counter *counterstmp = NULL;
+	/* used to be able to unlock earlier */
+	struct ebt_table_info *table;
+	struct ebt_table *t;
+
+	/* the user wants counters back
+	   the check on the size is done later, when we have the lock */
+	if (repl->num_counters) {
+		unsigned long size = repl->num_counters * sizeof(*counterstmp);
+		counterstmp = vmalloc(size);
+		if (!counterstmp)
+			return -ENOMEM;
+	}
+
+	newinfo->chainstack = NULL;
+	ret = ebt_verify_pointers(repl, newinfo);
+	if (ret != 0)
+		goto free_counterstmp;
+
+	ret = translate_table(net, repl->name, newinfo);
+
+	if (ret != 0)
+		goto free_counterstmp;
+
+	t = find_table_lock(net, repl->name, &ret, &ebt_mutex);
+	if (!t) {
+		ret = -ENOENT;
+		goto free_iterate;
+	}
+
+	/* the table doesn't like it */
+	if (t->check && (ret = t->check(newinfo, repl->valid_hooks)))
+		goto free_unlock;
+
+	if (repl->num_counters && repl->num_counters != t->private->nentries) {
+		BUGPRINT("Wrong nr. of counters requested\n");
+		ret = -EINVAL;
+		goto free_unlock;
+	}
+
+	/* we have the mutex lock, so no danger in reading this pointer */
+	table = t->private;
+	/* make sure the table can only be rmmod'ed if it contains no rules */
+	if (!table->nentries && newinfo->nentries && !try_module_get(t->me)) {
+		ret = -ENOENT;
+		goto free_unlock;
+	} else if (table->nentries && !newinfo->nentries)
+		module_put(t->me);
+	/* we need an atomic snapshot of the counters */
+	write_lock_bh(&t->lock);
+	if (repl->num_counters)
+		get_counters(t->private->counters, counterstmp,
+		   t->private->nentries);
+
+	t->private = newinfo;
+	write_unlock_bh(&t->lock);
+	mutex_unlock(&ebt_mutex);
+	/* so, a user can change the chains while having messed up her counter
+	   allocation. Only reason why this is done is because this way the lock
+	   is held only once, while this doesn't bring the kernel into a
+	   dangerous state. */
+	if (repl->num_counters &&
+	   copy_to_user(repl->counters, counterstmp,
+	   repl->num_counters * sizeof(struct ebt_counter))) {
+		/* Silent error, can't fail, new table is already in place */
+		net_warn_ratelimited("ebtables: counters copy to user failed while replacing table\n");
+	}
+
+	/* decrease module count and free resources */
+	EBT_ENTRY_ITERATE(table->entries, table->entries_size,
+			  ebt_cleanup_entry, net, NULL);
+
+	vfree(table->entries);
+	if (table->chainstack) {
+		for_each_possible_cpu(i)
+			vfree(table->chainstack[i]);
+		vfree(table->chainstack);
+	}
+	vfree(table);
+
+	vfree(counterstmp);
+
+#ifdef CONFIG_AUDIT
+	if (audit_enabled) {
+		struct audit_buffer *ab;
+
+		ab = audit_log_start(current->audit_context, GFP_KERNEL,
+				     AUDIT_NETFILTER_CFG);
+		if (ab) {
+			audit_log_format(ab, "table=%s family=%u entries=%u",
+					 repl->name, AF_BRIDGE, repl->nentries);
+			audit_log_end(ab);
+		}
+	}
+#endif
+	return ret;
+
+free_unlock:
+	mutex_unlock(&ebt_mutex);
+free_iterate:
+	EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+			  ebt_cleanup_entry, net, NULL);
+free_counterstmp:
+	vfree(counterstmp);
+	/* can be initialized in translate_table() */
+	if (newinfo->chainstack) {
+		for_each_possible_cpu(i)
+			vfree(newinfo->chainstack[i]);
+		vfree(newinfo->chainstack);
+	}
+	return ret;
+}
+
+/* replace the table */
+static int do_replace(struct net *net, const void __user *user,
+		      unsigned int len)
+{
+	int ret, countersize;
+	struct ebt_table_info *newinfo;
+	struct ebt_replace tmp;
+
+	if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+		return -EFAULT;
+
+	if (len != sizeof(tmp) + tmp.entries_size) {
+		BUGPRINT("Wrong len argument\n");
+		return -EINVAL;
+	}
+
+	if (tmp.entries_size == 0) {
+		BUGPRINT("Entries_size never zero\n");
+		return -EINVAL;
+	}
+	/* overflow check */
+	if (tmp.nentries >= ((INT_MAX - sizeof(struct ebt_table_info)) /
+			NR_CPUS - SMP_CACHE_BYTES) / sizeof(struct ebt_counter))
+		return -ENOMEM;
+	if (tmp.num_counters >= INT_MAX / sizeof(struct ebt_counter))
+		return -ENOMEM;
+
+	tmp.name[sizeof(tmp.name) - 1] = 0;
+
+	countersize = COUNTER_OFFSET(tmp.nentries) * nr_cpu_ids;
+	newinfo = vmalloc(sizeof(*newinfo) + countersize);
+	if (!newinfo)
+		return -ENOMEM;
+
+	if (countersize)
+		memset(newinfo->counters, 0, countersize);
+
+	newinfo->entries = vmalloc(tmp.entries_size);
+	if (!newinfo->entries) {
+		ret = -ENOMEM;
+		goto free_newinfo;
+	}
+	if (copy_from_user(
+	   newinfo->entries, tmp.entries, tmp.entries_size) != 0) {
+		BUGPRINT("Couldn't copy entries from userspace\n");
+		ret = -EFAULT;
+		goto free_entries;
+	}
+
+	ret = do_replace_finish(net, &tmp, newinfo);
+	if (ret == 0)
+		return ret;
+free_entries:
+	vfree(newinfo->entries);
+free_newinfo:
+	vfree(newinfo);
+	return ret;
+}
+
+struct ebt_table *
+ebt_register_table(struct net *net, const struct ebt_table *input_table)
+{
+	struct ebt_table_info *newinfo;
+	struct ebt_table *t, *table;
+	struct ebt_replace_kernel *repl;
+	int ret, i, countersize;
+	void *p;
+
+	if (input_table == NULL || (repl = input_table->table) == NULL ||
+	    repl->entries == NULL || repl->entries_size == 0 ||
+	    repl->counters != NULL || input_table->private != NULL) {
+		BUGPRINT("Bad table data for ebt_register_table!!!\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	/* Don't add one table to multiple lists. */
+	table = kmemdup(input_table, sizeof(struct ebt_table), GFP_KERNEL);
+	if (!table) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	countersize = COUNTER_OFFSET(repl->nentries) * nr_cpu_ids;
+	newinfo = vmalloc(sizeof(*newinfo) + countersize);
+	ret = -ENOMEM;
+	if (!newinfo)
+		goto free_table;
+
+	p = vmalloc(repl->entries_size);
+	if (!p)
+		goto free_newinfo;
+
+	memcpy(p, repl->entries, repl->entries_size);
+	newinfo->entries = p;
+
+	newinfo->entries_size = repl->entries_size;
+	newinfo->nentries = repl->nentries;
+
+	if (countersize)
+		memset(newinfo->counters, 0, countersize);
+
+	/* fill in newinfo and parse the entries */
+	newinfo->chainstack = NULL;
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		if ((repl->valid_hooks & (1 << i)) == 0)
+			newinfo->hook_entry[i] = NULL;
+		else
+			newinfo->hook_entry[i] = p +
+				((char *)repl->hook_entry[i] - repl->entries);
+	}
+	ret = translate_table(net, repl->name, newinfo);
+	if (ret != 0) {
+		BUGPRINT("Translate_table failed\n");
+		goto free_chainstack;
+	}
+
+	if (table->check && table->check(newinfo, table->valid_hooks)) {
+		BUGPRINT("The table doesn't like its own initial data, lol\n");
+		ret = -EINVAL;
+		goto free_chainstack;
+	}
+
+	table->private = newinfo;
+	rwlock_init(&table->lock);
+	mutex_lock(&ebt_mutex);
+	list_for_each_entry(t, &net->xt.tables[NFPROTO_BRIDGE], list) {
+		if (strcmp(t->name, table->name) == 0) {
+			ret = -EEXIST;
+			BUGPRINT("Table name already exists\n");
+			goto free_unlock;
+		}
+	}
+
+	/* Hold a reference count if the chains aren't empty */
+	if (newinfo->nentries && !try_module_get(table->me)) {
+		ret = -ENOENT;
+		goto free_unlock;
+	}
+	list_add(&table->list, &net->xt.tables[NFPROTO_BRIDGE]);
+	mutex_unlock(&ebt_mutex);
+	return table;
+free_unlock:
+	mutex_unlock(&ebt_mutex);
+free_chainstack:
+	if (newinfo->chainstack) {
+		for_each_possible_cpu(i)
+			vfree(newinfo->chainstack[i]);
+		vfree(newinfo->chainstack);
+	}
+	vfree(newinfo->entries);
+free_newinfo:
+	vfree(newinfo);
+free_table:
+	kfree(table);
+out:
+	return ERR_PTR(ret);
+}
+
+void ebt_unregister_table(struct net *net, struct ebt_table *table)
+{
+	int i;
+
+	if (!table) {
+		BUGPRINT("Request to unregister NULL table!!!\n");
+		return;
+	}
+	mutex_lock(&ebt_mutex);
+	list_del(&table->list);
+	mutex_unlock(&ebt_mutex);
+	EBT_ENTRY_ITERATE(table->private->entries, table->private->entries_size,
+			  ebt_cleanup_entry, net, NULL);
+	if (table->private->nentries)
+		module_put(table->me);
+	vfree(table->private->entries);
+	if (table->private->chainstack) {
+		for_each_possible_cpu(i)
+			vfree(table->private->chainstack[i]);
+		vfree(table->private->chainstack);
+	}
+	vfree(table->private);
+	kfree(table);
+}
+
+/* userspace just supplied us with counters */
+static int do_update_counters(struct net *net, const char *name,
+				struct ebt_counter __user *counters,
+				unsigned int num_counters,
+				const void __user *user, unsigned int len)
+{
+	int i, ret;
+	struct ebt_counter *tmp;
+	struct ebt_table *t;
+
+	if (num_counters == 0)
+		return -EINVAL;
+
+	tmp = vmalloc(num_counters * sizeof(*tmp));
+	if (!tmp)
+		return -ENOMEM;
+
+	t = find_table_lock(net, name, &ret, &ebt_mutex);
+	if (!t)
+		goto free_tmp;
+
+	if (num_counters != t->private->nentries) {
+		BUGPRINT("Wrong nr of counters\n");
+		ret = -EINVAL;
+		goto unlock_mutex;
+	}
+
+	if (copy_from_user(tmp, counters, num_counters * sizeof(*counters))) {
+		ret = -EFAULT;
+		goto unlock_mutex;
+	}
+
+	/* we want an atomic add of the counters */
+	write_lock_bh(&t->lock);
+
+	/* we add to the counters of the first cpu */
+	for (i = 0; i < num_counters; i++) {
+		t->private->counters[i].pcnt += tmp[i].pcnt;
+		t->private->counters[i].bcnt += tmp[i].bcnt;
+	}
+
+	write_unlock_bh(&t->lock);
+	ret = 0;
+unlock_mutex:
+	mutex_unlock(&ebt_mutex);
+free_tmp:
+	vfree(tmp);
+	return ret;
+}
+
+static int update_counters(struct net *net, const void __user *user,
+			    unsigned int len)
+{
+	struct ebt_replace hlp;
+
+	if (copy_from_user(&hlp, user, sizeof(hlp)))
+		return -EFAULT;
+
+	if (len != sizeof(hlp) + hlp.num_counters * sizeof(struct ebt_counter))
+		return -EINVAL;
+
+	return do_update_counters(net, hlp.name, hlp.counters,
+				hlp.num_counters, user, len);
+}
+
+static inline int ebt_make_matchname(const struct ebt_entry_match *m,
+    const char *base, char __user *ubase)
+{
+	char __user *hlp = ubase + ((char *)m - base);
+	char name[EBT_FUNCTION_MAXNAMELEN] = {};
+
+	/* ebtables expects 32 bytes long names but xt_match names are 29 bytes
+	   long. Copy 29 bytes and fill remaining bytes with zeroes. */
+	strlcpy(name, m->u.match->name, sizeof(name));
+	if (copy_to_user(hlp, name, EBT_FUNCTION_MAXNAMELEN))
+		return -EFAULT;
+	return 0;
+}
+
+static inline int ebt_make_watchername(const struct ebt_entry_watcher *w,
+    const char *base, char __user *ubase)
+{
+	char __user *hlp = ubase + ((char *)w - base);
+	char name[EBT_FUNCTION_MAXNAMELEN] = {};
+
+	strlcpy(name, w->u.watcher->name, sizeof(name));
+	if (copy_to_user(hlp , name, EBT_FUNCTION_MAXNAMELEN))
+		return -EFAULT;
+	return 0;
+}
+
+static inline int
+ebt_make_names(struct ebt_entry *e, const char *base, char __user *ubase)
+{
+	int ret;
+	char __user *hlp;
+	const struct ebt_entry_target *t;
+	char name[EBT_FUNCTION_MAXNAMELEN] = {};
+
+	if (e->bitmask == 0)
+		return 0;
+
+	hlp = ubase + (((char *)e + e->target_offset) - base);
+	t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+
+	ret = EBT_MATCH_ITERATE(e, ebt_make_matchname, base, ubase);
+	if (ret != 0)
+		return ret;
+	ret = EBT_WATCHER_ITERATE(e, ebt_make_watchername, base, ubase);
+	if (ret != 0)
+		return ret;
+	strlcpy(name, t->u.target->name, sizeof(name));
+	if (copy_to_user(hlp, name, EBT_FUNCTION_MAXNAMELEN))
+		return -EFAULT;
+	return 0;
+}
+
+static int copy_counters_to_user(struct ebt_table *t,
+				  const struct ebt_counter *oldcounters,
+				  void __user *user, unsigned int num_counters,
+				  unsigned int nentries)
+{
+	struct ebt_counter *counterstmp;
+	int ret = 0;
+
+	/* userspace might not need the counters */
+	if (num_counters == 0)
+		return 0;
+
+	if (num_counters != nentries) {
+		BUGPRINT("Num_counters wrong\n");
+		return -EINVAL;
+	}
+
+	counterstmp = vmalloc(nentries * sizeof(*counterstmp));
+	if (!counterstmp)
+		return -ENOMEM;
+
+	write_lock_bh(&t->lock);
+	get_counters(oldcounters, counterstmp, nentries);
+	write_unlock_bh(&t->lock);
+
+	if (copy_to_user(user, counterstmp,
+	   nentries * sizeof(struct ebt_counter)))
+		ret = -EFAULT;
+	vfree(counterstmp);
+	return ret;
+}
+
+/* called with ebt_mutex locked */
+static int copy_everything_to_user(struct ebt_table *t, void __user *user,
+    const int *len, int cmd)
+{
+	struct ebt_replace tmp;
+	const struct ebt_counter *oldcounters;
+	unsigned int entries_size, nentries;
+	int ret;
+	char *entries;
+
+	if (cmd == EBT_SO_GET_ENTRIES) {
+		entries_size = t->private->entries_size;
+		nentries = t->private->nentries;
+		entries = t->private->entries;
+		oldcounters = t->private->counters;
+	} else {
+		entries_size = t->table->entries_size;
+		nentries = t->table->nentries;
+		entries = t->table->entries;
+		oldcounters = t->table->counters;
+	}
+
+	if (copy_from_user(&tmp, user, sizeof(tmp)))
+		return -EFAULT;
+
+	if (*len != sizeof(struct ebt_replace) + entries_size +
+	   (tmp.num_counters ? nentries * sizeof(struct ebt_counter) : 0))
+		return -EINVAL;
+
+	if (tmp.nentries != nentries) {
+		BUGPRINT("Nentries wrong\n");
+		return -EINVAL;
+	}
+
+	if (tmp.entries_size != entries_size) {
+		BUGPRINT("Wrong size\n");
+		return -EINVAL;
+	}
+
+	ret = copy_counters_to_user(t, oldcounters, tmp.counters,
+					tmp.num_counters, nentries);
+	if (ret)
+		return ret;
+
+	if (copy_to_user(tmp.entries, entries, entries_size)) {
+		BUGPRINT("Couldn't copy entries to userspace\n");
+		return -EFAULT;
+	}
+	/* set the match/watcher/target names right */
+	return EBT_ENTRY_ITERATE(entries, entries_size,
+	   ebt_make_names, entries, tmp.entries);
+}
+
+static int do_ebt_set_ctl(struct sock *sk,
+	int cmd, void __user *user, unsigned int len)
+{
+	int ret;
+	struct net *net = sock_net(sk);
+
+	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	switch (cmd) {
+	case EBT_SO_SET_ENTRIES:
+		ret = do_replace(net, user, len);
+		break;
+	case EBT_SO_SET_COUNTERS:
+		ret = update_counters(net, user, len);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+static int do_ebt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
+{
+	int ret;
+	struct ebt_replace tmp;
+	struct ebt_table *t;
+	struct net *net = sock_net(sk);
+
+	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (copy_from_user(&tmp, user, sizeof(tmp)))
+		return -EFAULT;
+
+	t = find_table_lock(net, tmp.name, &ret, &ebt_mutex);
+	if (!t)
+		return ret;
+
+	switch (cmd) {
+	case EBT_SO_GET_INFO:
+	case EBT_SO_GET_INIT_INFO:
+		if (*len != sizeof(struct ebt_replace)) {
+			ret = -EINVAL;
+			mutex_unlock(&ebt_mutex);
+			break;
+		}
+		if (cmd == EBT_SO_GET_INFO) {
+			tmp.nentries = t->private->nentries;
+			tmp.entries_size = t->private->entries_size;
+			tmp.valid_hooks = t->valid_hooks;
+		} else {
+			tmp.nentries = t->table->nentries;
+			tmp.entries_size = t->table->entries_size;
+			tmp.valid_hooks = t->table->valid_hooks;
+		}
+		mutex_unlock(&ebt_mutex);
+		if (copy_to_user(user, &tmp, *len) != 0) {
+			BUGPRINT("c2u Didn't work\n");
+			ret = -EFAULT;
+			break;
+		}
+		ret = 0;
+		break;
+
+	case EBT_SO_GET_ENTRIES:
+	case EBT_SO_GET_INIT_ENTRIES:
+		ret = copy_everything_to_user(t, user, len, cmd);
+		mutex_unlock(&ebt_mutex);
+		break;
+
+	default:
+		mutex_unlock(&ebt_mutex);
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+#ifdef CONFIG_COMPAT
+/* 32 bit-userspace compatibility definitions. */
+struct compat_ebt_replace {
+	char name[EBT_TABLE_MAXNAMELEN];
+	compat_uint_t valid_hooks;
+	compat_uint_t nentries;
+	compat_uint_t entries_size;
+	/* start of the chains */
+	compat_uptr_t hook_entry[NF_BR_NUMHOOKS];
+	/* nr of counters userspace expects back */
+	compat_uint_t num_counters;
+	/* where the kernel will put the old counters. */
+	compat_uptr_t counters;
+	compat_uptr_t entries;
+};
+
+/* struct ebt_entry_match, _target and _watcher have same layout */
+struct compat_ebt_entry_mwt {
+	union {
+		char name[EBT_FUNCTION_MAXNAMELEN];
+		compat_uptr_t ptr;
+	} u;
+	compat_uint_t match_size;
+	compat_uint_t data[0];
+};
+
+/* account for possible padding between match_size and ->data */
+static int ebt_compat_entry_padsize(void)
+{
+	BUILD_BUG_ON(XT_ALIGN(sizeof(struct ebt_entry_match)) <
+			COMPAT_XT_ALIGN(sizeof(struct compat_ebt_entry_mwt)));
+	return (int) XT_ALIGN(sizeof(struct ebt_entry_match)) -
+			COMPAT_XT_ALIGN(sizeof(struct compat_ebt_entry_mwt));
+}
+
+static int ebt_compat_match_offset(const struct xt_match *match,
+				   unsigned int userlen)
+{
+	/*
+	 * ebt_among needs special handling. The kernel .matchsize is
+	 * set to -1 at registration time; at runtime an EBT_ALIGN()ed
+	 * value is expected.
+	 * Example: userspace sends 4500, ebt_among.c wants 4504.
+	 */
+	if (unlikely(match->matchsize == -1))
+		return XT_ALIGN(userlen) - COMPAT_XT_ALIGN(userlen);
+	return xt_compat_match_offset(match);
+}
+
+static int compat_match_to_user(struct ebt_entry_match *m, void __user **dstptr,
+				unsigned int *size)
+{
+	const struct xt_match *match = m->u.match;
+	struct compat_ebt_entry_mwt __user *cm = *dstptr;
+	int off = ebt_compat_match_offset(match, m->match_size);
+	compat_uint_t msize = m->match_size - off;
+
+	BUG_ON(off >= m->match_size);
+
+	if (copy_to_user(cm->u.name, match->name,
+	    strlen(match->name) + 1) || put_user(msize, &cm->match_size))
+		return -EFAULT;
+
+	if (match->compat_to_user) {
+		if (match->compat_to_user(cm->data, m->data))
+			return -EFAULT;
+	} else if (copy_to_user(cm->data, m->data, msize))
+			return -EFAULT;
+
+	*size -= ebt_compat_entry_padsize() + off;
+	*dstptr = cm->data;
+	*dstptr += msize;
+	return 0;
+}
+
+static int compat_target_to_user(struct ebt_entry_target *t,
+				 void __user **dstptr,
+				 unsigned int *size)
+{
+	const struct xt_target *target = t->u.target;
+	struct compat_ebt_entry_mwt __user *cm = *dstptr;
+	int off = xt_compat_target_offset(target);
+	compat_uint_t tsize = t->target_size - off;
+
+	BUG_ON(off >= t->target_size);
+
+	if (copy_to_user(cm->u.name, target->name,
+	    strlen(target->name) + 1) || put_user(tsize, &cm->match_size))
+		return -EFAULT;
+
+	if (target->compat_to_user) {
+		if (target->compat_to_user(cm->data, t->data))
+			return -EFAULT;
+	} else if (copy_to_user(cm->data, t->data, tsize))
+		return -EFAULT;
+
+	*size -= ebt_compat_entry_padsize() + off;
+	*dstptr = cm->data;
+	*dstptr += tsize;
+	return 0;
+}
+
+static int compat_watcher_to_user(struct ebt_entry_watcher *w,
+				  void __user **dstptr,
+				  unsigned int *size)
+{
+	return compat_target_to_user((struct ebt_entry_target *)w,
+							dstptr, size);
+}
+
+static int compat_copy_entry_to_user(struct ebt_entry *e, void __user **dstptr,
+				unsigned int *size)
+{
+	struct ebt_entry_target *t;
+	struct ebt_entry __user *ce;
+	u32 watchers_offset, target_offset, next_offset;
+	compat_uint_t origsize;
+	int ret;
+
+	if (e->bitmask == 0) {
+		if (*size < sizeof(struct ebt_entries))
+			return -EINVAL;
+		if (copy_to_user(*dstptr, e, sizeof(struct ebt_entries)))
+			return -EFAULT;
+
+		*dstptr += sizeof(struct ebt_entries);
+		*size -= sizeof(struct ebt_entries);
+		return 0;
+	}
+
+	if (*size < sizeof(*ce))
+		return -EINVAL;
+
+	ce = (struct ebt_entry __user *)*dstptr;
+	if (copy_to_user(ce, e, sizeof(*ce)))
+		return -EFAULT;
+
+	origsize = *size;
+	*dstptr += sizeof(*ce);
+
+	ret = EBT_MATCH_ITERATE(e, compat_match_to_user, dstptr, size);
+	if (ret)
+		return ret;
+	watchers_offset = e->watchers_offset - (origsize - *size);
+
+	ret = EBT_WATCHER_ITERATE(e, compat_watcher_to_user, dstptr, size);
+	if (ret)
+		return ret;
+	target_offset = e->target_offset - (origsize - *size);
+
+	t = (struct ebt_entry_target *) ((char *) e + e->target_offset);
+
+	ret = compat_target_to_user(t, dstptr, size);
+	if (ret)
+		return ret;
+	next_offset = e->next_offset - (origsize - *size);
+
+	if (put_user(watchers_offset, &ce->watchers_offset) ||
+	    put_user(target_offset, &ce->target_offset) ||
+	    put_user(next_offset, &ce->next_offset))
+		return -EFAULT;
+
+	*size -= sizeof(*ce);
+	return 0;
+}
+
+static int compat_calc_match(struct ebt_entry_match *m, int *off)
+{
+	*off += ebt_compat_match_offset(m->u.match, m->match_size);
+	*off += ebt_compat_entry_padsize();
+	return 0;
+}
+
+static int compat_calc_watcher(struct ebt_entry_watcher *w, int *off)
+{
+	*off += xt_compat_target_offset(w->u.watcher);
+	*off += ebt_compat_entry_padsize();
+	return 0;
+}
+
+static int compat_calc_entry(const struct ebt_entry *e,
+			     const struct ebt_table_info *info,
+			     const void *base,
+			     struct compat_ebt_replace *newinfo)
+{
+	const struct ebt_entry_target *t;
+	unsigned int entry_offset;
+	int off, ret, i;
+
+	if (e->bitmask == 0)
+		return 0;
+
+	off = 0;
+	entry_offset = (void *)e - base;
+
+	EBT_MATCH_ITERATE(e, compat_calc_match, &off);
+	EBT_WATCHER_ITERATE(e, compat_calc_watcher, &off);
+
+	t = (const struct ebt_entry_target *) ((char *) e + e->target_offset);
+
+	off += xt_compat_target_offset(t->u.target);
+	off += ebt_compat_entry_padsize();
+
+	newinfo->entries_size -= off;
+
+	ret = xt_compat_add_offset(NFPROTO_BRIDGE, entry_offset, off);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		const void *hookptr = info->hook_entry[i];
+		if (info->hook_entry[i] &&
+		    (e < (struct ebt_entry *)(base - hookptr))) {
+			newinfo->hook_entry[i] -= off;
+			pr_debug("0x%08X -> 0x%08X\n",
+					newinfo->hook_entry[i] + off,
+					newinfo->hook_entry[i]);
+		}
+	}
+
+	return 0;
+}
+
+
+static int compat_table_info(const struct ebt_table_info *info,
+			     struct compat_ebt_replace *newinfo)
+{
+	unsigned int size = info->entries_size;
+	const void *entries = info->entries;
+
+	newinfo->entries_size = size;
+
+	xt_compat_init_offsets(NFPROTO_BRIDGE, info->nentries);
+	return EBT_ENTRY_ITERATE(entries, size, compat_calc_entry, info,
+							entries, newinfo);
+}
+
+static int compat_copy_everything_to_user(struct ebt_table *t,
+					  void __user *user, int *len, int cmd)
+{
+	struct compat_ebt_replace repl, tmp;
+	struct ebt_counter *oldcounters;
+	struct ebt_table_info tinfo;
+	int ret;
+	void __user *pos;
+
+	memset(&tinfo, 0, sizeof(tinfo));
+
+	if (cmd == EBT_SO_GET_ENTRIES) {
+		tinfo.entries_size = t->private->entries_size;
+		tinfo.nentries = t->private->nentries;
+		tinfo.entries = t->private->entries;
+		oldcounters = t->private->counters;
+	} else {
+		tinfo.entries_size = t->table->entries_size;
+		tinfo.nentries = t->table->nentries;
+		tinfo.entries = t->table->entries;
+		oldcounters = t->table->counters;
+	}
+
+	if (copy_from_user(&tmp, user, sizeof(tmp)))
+		return -EFAULT;
+
+	if (tmp.nentries != tinfo.nentries ||
+	   (tmp.num_counters && tmp.num_counters != tinfo.nentries))
+		return -EINVAL;
+
+	memcpy(&repl, &tmp, sizeof(repl));
+	if (cmd == EBT_SO_GET_ENTRIES)
+		ret = compat_table_info(t->private, &repl);
+	else
+		ret = compat_table_info(&tinfo, &repl);
+	if (ret)
+		return ret;
+
+	if (*len != sizeof(tmp) + repl.entries_size +
+	   (tmp.num_counters? tinfo.nentries * sizeof(struct ebt_counter): 0)) {
+		pr_err("wrong size: *len %d, entries_size %u, replsz %d\n",
+				*len, tinfo.entries_size, repl.entries_size);
+		return -EINVAL;
+	}
+
+	/* userspace might not need the counters */
+	ret = copy_counters_to_user(t, oldcounters, compat_ptr(tmp.counters),
+					tmp.num_counters, tinfo.nentries);
+	if (ret)
+		return ret;
+
+	pos = compat_ptr(tmp.entries);
+	return EBT_ENTRY_ITERATE(tinfo.entries, tinfo.entries_size,
+			compat_copy_entry_to_user, &pos, &tmp.entries_size);
+}
+
+struct ebt_entries_buf_state {
+	char *buf_kern_start;	/* kernel buffer to copy (translated) data to */
+	u32 buf_kern_len;	/* total size of kernel buffer */
+	u32 buf_kern_offset;	/* amount of data copied so far */
+	u32 buf_user_offset;	/* read position in userspace buffer */
+};
+
+static int ebt_buf_count(struct ebt_entries_buf_state *state, unsigned int sz)
+{
+	state->buf_kern_offset += sz;
+	return state->buf_kern_offset >= sz ? 0 : -EINVAL;
+}
+
+static int ebt_buf_add(struct ebt_entries_buf_state *state,
+		       void *data, unsigned int sz)
+{
+	if (state->buf_kern_start == NULL)
+		goto count_only;
+
+	BUG_ON(state->buf_kern_offset + sz > state->buf_kern_len);
+
+	memcpy(state->buf_kern_start + state->buf_kern_offset, data, sz);
+
+ count_only:
+	state->buf_user_offset += sz;
+	return ebt_buf_count(state, sz);
+}
+
+static int ebt_buf_add_pad(struct ebt_entries_buf_state *state, unsigned int sz)
+{
+	char *b = state->buf_kern_start;
+
+	BUG_ON(b && state->buf_kern_offset > state->buf_kern_len);
+
+	if (b != NULL && sz > 0)
+		memset(b + state->buf_kern_offset, 0, sz);
+	/* do not adjust ->buf_user_offset here, we added kernel-side padding */
+	return ebt_buf_count(state, sz);
+}
+
+enum compat_mwt {
+	EBT_COMPAT_MATCH,
+	EBT_COMPAT_WATCHER,
+	EBT_COMPAT_TARGET,
+};
+
+static int compat_mtw_from_user(struct compat_ebt_entry_mwt *mwt,
+				enum compat_mwt compat_mwt,
+				struct ebt_entries_buf_state *state,
+				const unsigned char *base)
+{
+	char name[EBT_FUNCTION_MAXNAMELEN];
+	struct xt_match *match;
+	struct xt_target *wt;
+	void *dst = NULL;
+	int off, pad = 0;
+	unsigned int size_kern, match_size = mwt->match_size;
+
+	strlcpy(name, mwt->u.name, sizeof(name));
+
+	if (state->buf_kern_start)
+		dst = state->buf_kern_start + state->buf_kern_offset;
+
+	switch (compat_mwt) {
+	case EBT_COMPAT_MATCH:
+		match = xt_request_find_match(NFPROTO_BRIDGE, name, 0);
+		if (IS_ERR(match))
+			return PTR_ERR(match);
+
+		off = ebt_compat_match_offset(match, match_size);
+		if (dst) {
+			if (match->compat_from_user)
+				match->compat_from_user(dst, mwt->data);
+			else
+				memcpy(dst, mwt->data, match_size);
+		}
+
+		size_kern = match->matchsize;
+		if (unlikely(size_kern == -1))
+			size_kern = match_size;
+		module_put(match->me);
+		break;
+	case EBT_COMPAT_WATCHER: /* fallthrough */
+	case EBT_COMPAT_TARGET:
+		wt = xt_request_find_target(NFPROTO_BRIDGE, name, 0);
+		if (IS_ERR(wt))
+			return PTR_ERR(wt);
+		off = xt_compat_target_offset(wt);
+
+		if (dst) {
+			if (wt->compat_from_user)
+				wt->compat_from_user(dst, mwt->data);
+			else
+				memcpy(dst, mwt->data, match_size);
+		}
+
+		size_kern = wt->targetsize;
+		module_put(wt->me);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	state->buf_kern_offset += match_size + off;
+	state->buf_user_offset += match_size;
+	pad = XT_ALIGN(size_kern) - size_kern;
+
+	if (pad > 0 && dst) {
+		BUG_ON(state->buf_kern_len <= pad);
+		BUG_ON(state->buf_kern_offset - (match_size + off) + size_kern > state->buf_kern_len - pad);
+		memset(dst + size_kern, 0, pad);
+	}
+	return off + match_size;
+}
+
+/*
+ * return size of all matches, watchers or target, including necessary
+ * alignment and padding.
+ */
+static int ebt_size_mwt(struct compat_ebt_entry_mwt *match32,
+			unsigned int size_left, enum compat_mwt type,
+			struct ebt_entries_buf_state *state, const void *base)
+{
+	int growth = 0;
+	char *buf;
+
+	if (size_left == 0)
+		return 0;
+
+	buf = (char *) match32;
+
+	while (size_left >= sizeof(*match32)) {
+		struct ebt_entry_match *match_kern;
+		int ret;
+
+		match_kern = (struct ebt_entry_match *) state->buf_kern_start;
+		if (match_kern) {
+			char *tmp;
+			tmp = state->buf_kern_start + state->buf_kern_offset;
+			match_kern = (struct ebt_entry_match *) tmp;
+		}
+		ret = ebt_buf_add(state, buf, sizeof(*match32));
+		if (ret < 0)
+			return ret;
+		size_left -= sizeof(*match32);
+
+		/* add padding before match->data (if any) */
+		ret = ebt_buf_add_pad(state, ebt_compat_entry_padsize());
+		if (ret < 0)
+			return ret;
+
+		if (match32->match_size > size_left)
+			return -EINVAL;
+
+		size_left -= match32->match_size;
+
+		ret = compat_mtw_from_user(match32, type, state, base);
+		if (ret < 0)
+			return ret;
+
+		BUG_ON(ret < match32->match_size);
+		growth += ret - match32->match_size;
+		growth += ebt_compat_entry_padsize();
+
+		buf += sizeof(*match32);
+		buf += match32->match_size;
+
+		if (match_kern)
+			match_kern->match_size = ret;
+
+		WARN_ON(type == EBT_COMPAT_TARGET && size_left);
+		match32 = (struct compat_ebt_entry_mwt *) buf;
+	}
+
+	return growth;
+}
+
+/* called for all ebt_entry structures. */
+static int size_entry_mwt(struct ebt_entry *entry, const unsigned char *base,
+			  unsigned int *total,
+			  struct ebt_entries_buf_state *state)
+{
+	unsigned int i, j, startoff, new_offset = 0;
+	/* stores match/watchers/targets & offset of next struct ebt_entry: */
+	unsigned int offsets[4];
+	unsigned int *offsets_update = NULL;
+	int ret;
+	char *buf_start;
+
+	if (*total < sizeof(struct ebt_entries))
+		return -EINVAL;
+
+	if (!entry->bitmask) {
+		*total -= sizeof(struct ebt_entries);
+		return ebt_buf_add(state, entry, sizeof(struct ebt_entries));
+	}
+	if (*total < sizeof(*entry) || entry->next_offset < sizeof(*entry))
+		return -EINVAL;
+
+	startoff = state->buf_user_offset;
+	/* pull in most part of ebt_entry, it does not need to be changed. */
+	ret = ebt_buf_add(state, entry,
+			offsetof(struct ebt_entry, watchers_offset));
+	if (ret < 0)
+		return ret;
+
+	offsets[0] = sizeof(struct ebt_entry); /* matches come first */
+	memcpy(&offsets[1], &entry->watchers_offset,
+			sizeof(offsets) - sizeof(offsets[0]));
+
+	if (state->buf_kern_start) {
+		buf_start = state->buf_kern_start + state->buf_kern_offset;
+		offsets_update = (unsigned int *) buf_start;
+	}
+	ret = ebt_buf_add(state, &offsets[1],
+			sizeof(offsets) - sizeof(offsets[0]));
+	if (ret < 0)
+		return ret;
+	buf_start = (char *) entry;
+	/*
+	 * 0: matches offset, always follows ebt_entry.
+	 * 1: watchers offset, from ebt_entry structure
+	 * 2: target offset, from ebt_entry structure
+	 * 3: next ebt_entry offset, from ebt_entry structure
+	 *
+	 * offsets are relative to beginning of struct ebt_entry (i.e., 0).
+	 */
+	for (i = 0, j = 1 ; j < 4 ; j++, i++) {
+		struct compat_ebt_entry_mwt *match32;
+		unsigned int size;
+		char *buf = buf_start;
+
+		buf = buf_start + offsets[i];
+		if (offsets[i] > offsets[j])
+			return -EINVAL;
+
+		match32 = (struct compat_ebt_entry_mwt *) buf;
+		size = offsets[j] - offsets[i];
+		ret = ebt_size_mwt(match32, size, i, state, base);
+		if (ret < 0)
+			return ret;
+		new_offset += ret;
+		if (offsets_update && new_offset) {
+			pr_debug("change offset %d to %d\n",
+				offsets_update[i], offsets[j] + new_offset);
+			offsets_update[i] = offsets[j] + new_offset;
+		}
+	}
+
+	if (state->buf_kern_start == NULL) {
+		unsigned int offset = buf_start - (char *) base;
+
+		ret = xt_compat_add_offset(NFPROTO_BRIDGE, offset, new_offset);
+		if (ret < 0)
+			return ret;
+	}
+
+	startoff = state->buf_user_offset - startoff;
+
+	BUG_ON(*total < startoff);
+	*total -= startoff;
+	return 0;
+}
+
+/*
+ * repl->entries_size is the size of the ebt_entry blob in userspace.
+ * It might need more memory when copied to a 64 bit kernel in case
+ * userspace is 32-bit. So, first task: find out how much memory is needed.
+ *
+ * Called before validation is performed.
+ */
+static int compat_copy_entries(unsigned char *data, unsigned int size_user,
+				struct ebt_entries_buf_state *state)
+{
+	unsigned int size_remaining = size_user;
+	int ret;
+
+	ret = EBT_ENTRY_ITERATE(data, size_user, size_entry_mwt, data,
+					&size_remaining, state);
+	if (ret < 0)
+		return ret;
+
+	WARN_ON(size_remaining);
+	return state->buf_kern_offset;
+}
+
+
+static int compat_copy_ebt_replace_from_user(struct ebt_replace *repl,
+					    void __user *user, unsigned int len)
+{
+	struct compat_ebt_replace tmp;
+	int i;
+
+	if (len < sizeof(tmp))
+		return -EINVAL;
+
+	if (copy_from_user(&tmp, user, sizeof(tmp)))
+		return -EFAULT;
+
+	if (len != sizeof(tmp) + tmp.entries_size)
+		return -EINVAL;
+
+	if (tmp.entries_size == 0)
+		return -EINVAL;
+
+	if (tmp.nentries >= ((INT_MAX - sizeof(struct ebt_table_info)) /
+			NR_CPUS - SMP_CACHE_BYTES) / sizeof(struct ebt_counter))
+		return -ENOMEM;
+	if (tmp.num_counters >= INT_MAX / sizeof(struct ebt_counter))
+		return -ENOMEM;
+
+	memcpy(repl, &tmp, offsetof(struct ebt_replace, hook_entry));
+
+	/* starting with hook_entry, 32 vs. 64 bit structures are different */
+	for (i = 0; i < NF_BR_NUMHOOKS; i++)
+		repl->hook_entry[i] = compat_ptr(tmp.hook_entry[i]);
+
+	repl->num_counters = tmp.num_counters;
+	repl->counters = compat_ptr(tmp.counters);
+	repl->entries = compat_ptr(tmp.entries);
+	return 0;
+}
+
+static int compat_do_replace(struct net *net, void __user *user,
+			     unsigned int len)
+{
+	int ret, i, countersize, size64;
+	struct ebt_table_info *newinfo;
+	struct ebt_replace tmp;
+	struct ebt_entries_buf_state state;
+	void *entries_tmp;
+
+	ret = compat_copy_ebt_replace_from_user(&tmp, user, len);
+	if (ret) {
+		/* try real handler in case userland supplied needed padding */
+		if (ret == -EINVAL && do_replace(net, user, len) == 0)
+			ret = 0;
+		return ret;
+	}
+
+	countersize = COUNTER_OFFSET(tmp.nentries) * nr_cpu_ids;
+	newinfo = vmalloc(sizeof(*newinfo) + countersize);
+	if (!newinfo)
+		return -ENOMEM;
+
+	if (countersize)
+		memset(newinfo->counters, 0, countersize);
+
+	memset(&state, 0, sizeof(state));
+
+	newinfo->entries = vmalloc(tmp.entries_size);
+	if (!newinfo->entries) {
+		ret = -ENOMEM;
+		goto free_newinfo;
+	}
+	if (copy_from_user(
+	   newinfo->entries, tmp.entries, tmp.entries_size) != 0) {
+		ret = -EFAULT;
+		goto free_entries;
+	}
+
+	entries_tmp = newinfo->entries;
+
+	xt_compat_lock(NFPROTO_BRIDGE);
+
+	xt_compat_init_offsets(NFPROTO_BRIDGE, tmp.nentries);
+	ret = compat_copy_entries(entries_tmp, tmp.entries_size, &state);
+	if (ret < 0)
+		goto out_unlock;
+
+	pr_debug("tmp.entries_size %d, kern off %d, user off %d delta %d\n",
+		tmp.entries_size, state.buf_kern_offset, state.buf_user_offset,
+		xt_compat_calc_jump(NFPROTO_BRIDGE, tmp.entries_size));
+
+	size64 = ret;
+	newinfo->entries = vmalloc(size64);
+	if (!newinfo->entries) {
+		vfree(entries_tmp);
+		ret = -ENOMEM;
+		goto out_unlock;
+	}
+
+	memset(&state, 0, sizeof(state));
+	state.buf_kern_start = newinfo->entries;
+	state.buf_kern_len = size64;
+
+	ret = compat_copy_entries(entries_tmp, tmp.entries_size, &state);
+	BUG_ON(ret < 0);	/* parses same data again */
+
+	vfree(entries_tmp);
+	tmp.entries_size = size64;
+
+	for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+		char __user *usrptr;
+		if (tmp.hook_entry[i]) {
+			unsigned int delta;
+			usrptr = (char __user *) tmp.hook_entry[i];
+			delta = usrptr - tmp.entries;
+			usrptr += xt_compat_calc_jump(NFPROTO_BRIDGE, delta);
+			tmp.hook_entry[i] = (struct ebt_entries __user *)usrptr;
+		}
+	}
+
+	xt_compat_flush_offsets(NFPROTO_BRIDGE);
+	xt_compat_unlock(NFPROTO_BRIDGE);
+
+	ret = do_replace_finish(net, &tmp, newinfo);
+	if (ret == 0)
+		return ret;
+free_entries:
+	vfree(newinfo->entries);
+free_newinfo:
+	vfree(newinfo);
+	return ret;
+out_unlock:
+	xt_compat_flush_offsets(NFPROTO_BRIDGE);
+	xt_compat_unlock(NFPROTO_BRIDGE);
+	goto free_entries;
+}
+
+static int compat_update_counters(struct net *net, void __user *user,
+				  unsigned int len)
+{
+	struct compat_ebt_replace hlp;
+
+	if (copy_from_user(&hlp, user, sizeof(hlp)))
+		return -EFAULT;
+
+	/* try real handler in case userland supplied needed padding */
+	if (len != sizeof(hlp) + hlp.num_counters * sizeof(struct ebt_counter))
+		return update_counters(net, user, len);
+
+	return do_update_counters(net, hlp.name, compat_ptr(hlp.counters),
+					hlp.num_counters, user, len);
+}
+
+static int compat_do_ebt_set_ctl(struct sock *sk,
+		int cmd, void __user *user, unsigned int len)
+{
+	int ret;
+	struct net *net = sock_net(sk);
+
+	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	switch (cmd) {
+	case EBT_SO_SET_ENTRIES:
+		ret = compat_do_replace(net, user, len);
+		break;
+	case EBT_SO_SET_COUNTERS:
+		ret = compat_update_counters(net, user, len);
+		break;
+	default:
+		ret = -EINVAL;
+  }
+	return ret;
+}
+
+static int compat_do_ebt_get_ctl(struct sock *sk, int cmd,
+		void __user *user, int *len)
+{
+	int ret;
+	struct compat_ebt_replace tmp;
+	struct ebt_table *t;
+	struct net *net = sock_net(sk);
+
+	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+		return -EPERM;
+
+	/* try real handler in case userland supplied needed padding */
+	if ((cmd == EBT_SO_GET_INFO ||
+	     cmd == EBT_SO_GET_INIT_INFO) && *len != sizeof(tmp))
+			return do_ebt_get_ctl(sk, cmd, user, len);
+
+	if (copy_from_user(&tmp, user, sizeof(tmp)))
+		return -EFAULT;
+
+	t = find_table_lock(net, tmp.name, &ret, &ebt_mutex);
+	if (!t)
+		return ret;
+
+	xt_compat_lock(NFPROTO_BRIDGE);
+	switch (cmd) {
+	case EBT_SO_GET_INFO:
+		tmp.nentries = t->private->nentries;
+		ret = compat_table_info(t->private, &tmp);
+		if (ret)
+			goto out;
+		tmp.valid_hooks = t->valid_hooks;
+
+		if (copy_to_user(user, &tmp, *len) != 0) {
+			ret = -EFAULT;
+			break;
+		}
+		ret = 0;
+		break;
+	case EBT_SO_GET_INIT_INFO:
+		tmp.nentries = t->table->nentries;
+		tmp.entries_size = t->table->entries_size;
+		tmp.valid_hooks = t->table->valid_hooks;
+
+		if (copy_to_user(user, &tmp, *len) != 0) {
+			ret = -EFAULT;
+			break;
+		}
+		ret = 0;
+		break;
+	case EBT_SO_GET_ENTRIES:
+	case EBT_SO_GET_INIT_ENTRIES:
+		/*
+		 * try real handler first in case of userland-side padding.
+		 * in case we are dealing with an 'ordinary' 32 bit binary
+		 * without 64bit compatibility padding, this will fail right
+		 * after copy_from_user when the *len argument is validated.
+		 *
+		 * the compat_ variant needs to do one pass over the kernel
+		 * data set to adjust for size differences before it the check.
+		 */
+		if (copy_everything_to_user(t, user, len, cmd) == 0)
+			ret = 0;
+		else
+			ret = compat_copy_everything_to_user(t, user, len, cmd);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+ out:
+	xt_compat_flush_offsets(NFPROTO_BRIDGE);
+	xt_compat_unlock(NFPROTO_BRIDGE);
+	mutex_unlock(&ebt_mutex);
+	return ret;
+}
+#endif
+
+static struct nf_sockopt_ops ebt_sockopts = {
+	.pf		= PF_INET,
+	.set_optmin	= EBT_BASE_CTL,
+	.set_optmax	= EBT_SO_SET_MAX + 1,
+	.set		= do_ebt_set_ctl,
+#ifdef CONFIG_COMPAT
+	.compat_set	= compat_do_ebt_set_ctl,
+#endif
+	.get_optmin	= EBT_BASE_CTL,
+	.get_optmax	= EBT_SO_GET_MAX + 1,
+	.get		= do_ebt_get_ctl,
+#ifdef CONFIG_COMPAT
+	.compat_get	= compat_do_ebt_get_ctl,
+#endif
+	.owner		= THIS_MODULE,
+};
+
+static int __init ebtables_init(void)
+{
+	int ret;
+
+	ret = xt_register_target(&ebt_standard_target);
+	if (ret < 0)
+		return ret;
+	ret = nf_register_sockopt(&ebt_sockopts);
+	if (ret < 0) {
+		xt_unregister_target(&ebt_standard_target);
+		return ret;
+	}
+
+	printk(KERN_INFO "Ebtables v2.0 registered\n");
+	return 0;
+}
+
+static void __exit ebtables_fini(void)
+{
+	nf_unregister_sockopt(&ebt_sockopts);
+	xt_unregister_target(&ebt_standard_target);
+	printk(KERN_INFO "Ebtables v2.0 unregistered\n");
+}
+
+EXPORT_SYMBOL(ebt_register_table);
+EXPORT_SYMBOL(ebt_unregister_table);
+EXPORT_SYMBOL(ebt_do_table);
+module_init(ebtables_init);
+module_exit(ebtables_fini);
+MODULE_LICENSE("GPL");
diff --git a/kernel/net/bridge/netfilter/nf_log_bridge.c b/kernel/net/bridge/netfilter/nf_log_bridge.c
new file mode 100644
index 000000000..5d9953a90
--- /dev/null
+++ b/kernel/net/bridge/netfilter/nf_log_bridge.c
@@ -0,0 +1,96 @@
+/*
+ * (C) 2014 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/skbuff.h>
+#include <linux/if_bridge.h>
+#include <linux/ip.h>
+#include <net/route.h>
+
+#include <linux/netfilter.h>
+#include <net/netfilter/nf_log.h>
+
+static void nf_log_bridge_packet(struct net *net, u_int8_t pf,
+				 unsigned int hooknum,
+				 const struct sk_buff *skb,
+				 const struct net_device *in,
+				 const struct net_device *out,
+				 const struct nf_loginfo *loginfo,
+				 const char *prefix)
+{
+	switch (eth_hdr(skb)->h_proto) {
+	case htons(ETH_P_IP):
+		nf_log_packet(net, NFPROTO_IPV4, hooknum, skb, in, out,
+			      loginfo, "%s", prefix);
+		break;
+	case htons(ETH_P_IPV6):
+		nf_log_packet(net, NFPROTO_IPV6, hooknum, skb, in, out,
+			      loginfo, "%s", prefix);
+		break;
+	case htons(ETH_P_ARP):
+	case htons(ETH_P_RARP):
+		nf_log_packet(net, NFPROTO_ARP, hooknum, skb, in, out,
+			      loginfo, "%s", prefix);
+		break;
+	}
+}
+
+static struct nf_logger nf_bridge_logger __read_mostly = {
+	.name		= "nf_log_bridge",
+	.type		= NF_LOG_TYPE_LOG,
+	.logfn		= nf_log_bridge_packet,
+	.me		= THIS_MODULE,
+};
+
+static int __net_init nf_log_bridge_net_init(struct net *net)
+{
+	nf_log_set(net, NFPROTO_BRIDGE, &nf_bridge_logger);
+	return 0;
+}
+
+static void __net_exit nf_log_bridge_net_exit(struct net *net)
+{
+	nf_log_unset(net, &nf_bridge_logger);
+}
+
+static struct pernet_operations nf_log_bridge_net_ops = {
+	.init = nf_log_bridge_net_init,
+	.exit = nf_log_bridge_net_exit,
+};
+
+static int __init nf_log_bridge_init(void)
+{
+	int ret;
+
+	/* Request to load the real packet loggers. */
+	nf_logger_request_module(NFPROTO_IPV4, NF_LOG_TYPE_LOG);
+	nf_logger_request_module(NFPROTO_IPV6, NF_LOG_TYPE_LOG);
+	nf_logger_request_module(NFPROTO_ARP, NF_LOG_TYPE_LOG);
+
+	ret = register_pernet_subsys(&nf_log_bridge_net_ops);
+	if (ret < 0)
+		return ret;
+
+	nf_log_register(NFPROTO_BRIDGE, &nf_bridge_logger);
+	return 0;
+}
+
+static void __exit nf_log_bridge_exit(void)
+{
+	unregister_pernet_subsys(&nf_log_bridge_net_ops);
+	nf_log_unregister(&nf_bridge_logger);
+}
+
+module_init(nf_log_bridge_init);
+module_exit(nf_log_bridge_exit);
+
+MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
+MODULE_DESCRIPTION("Netfilter bridge packet logging");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NF_LOGGER(AF_BRIDGE, 0);
diff --git a/kernel/net/bridge/netfilter/nf_tables_bridge.c b/kernel/net/bridge/netfilter/nf_tables_bridge.c
new file mode 100644
index 000000000..a343e6244
--- /dev/null
+++ b/kernel/net/bridge/netfilter/nf_tables_bridge.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
+ * Copyright (c) 2013 Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Development of this code funded by Astaro AG (http://www.astaro.com/)
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/netfilter_bridge.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables_bridge.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <net/netfilter/nf_tables_ipv4.h>
+#include <net/netfilter/nf_tables_ipv6.h>
+
+int nft_bridge_iphdr_validate(struct sk_buff *skb)
+{
+	struct iphdr *iph;
+	u32 len;
+
+	if (!pskb_may_pull(skb, sizeof(struct iphdr)))
+		return 0;
+
+	iph = ip_hdr(skb);
+	if (iph->ihl < 5 || iph->version != 4)
+		return 0;
+
+	len = ntohs(iph->tot_len);
+	if (skb->len < len)
+		return 0;
+	else if (len < (iph->ihl*4))
+		return 0;
+
+	if (!pskb_may_pull(skb, iph->ihl*4))
+		return 0;
+
+	return 1;
+}
+EXPORT_SYMBOL_GPL(nft_bridge_iphdr_validate);
+
+int nft_bridge_ip6hdr_validate(struct sk_buff *skb)
+{
+	struct ipv6hdr *hdr;
+	u32 pkt_len;
+
+	if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
+		return 0;
+
+	hdr = ipv6_hdr(skb);
+	if (hdr->version != 6)
+		return 0;
+
+	pkt_len = ntohs(hdr->payload_len);
+	if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
+		return 0;
+
+	return 1;
+}
+EXPORT_SYMBOL_GPL(nft_bridge_ip6hdr_validate);
+
+static inline void nft_bridge_set_pktinfo_ipv4(struct nft_pktinfo *pkt,
+					       const struct nf_hook_ops *ops,
+					       struct sk_buff *skb,
+					       const struct nf_hook_state *state)
+{
+	if (nft_bridge_iphdr_validate(skb))
+		nft_set_pktinfo_ipv4(pkt, ops, skb, state);
+	else
+		nft_set_pktinfo(pkt, ops, skb, state);
+}
+
+static inline void nft_bridge_set_pktinfo_ipv6(struct nft_pktinfo *pkt,
+					       const struct nf_hook_ops *ops,
+					       struct sk_buff *skb,
+					       const struct nf_hook_state *state)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+	if (nft_bridge_ip6hdr_validate(skb) &&
+	    nft_set_pktinfo_ipv6(pkt, ops, skb, state) == 0)
+		return;
+#endif
+	nft_set_pktinfo(pkt, ops, skb, state);
+}
+
+static unsigned int
+nft_do_chain_bridge(const struct nf_hook_ops *ops,
+		    struct sk_buff *skb,
+		    const struct nf_hook_state *state)
+{
+	struct nft_pktinfo pkt;
+
+	switch (eth_hdr(skb)->h_proto) {
+	case htons(ETH_P_IP):
+		nft_bridge_set_pktinfo_ipv4(&pkt, ops, skb, state);
+		break;
+	case htons(ETH_P_IPV6):
+		nft_bridge_set_pktinfo_ipv6(&pkt, ops, skb, state);
+		break;
+	default:
+		nft_set_pktinfo(&pkt, ops, skb, state);
+		break;
+	}
+
+	return nft_do_chain(&pkt, ops);
+}
+
+static struct nft_af_info nft_af_bridge __read_mostly = {
+	.family		= NFPROTO_BRIDGE,
+	.nhooks		= NF_BR_NUMHOOKS,
+	.owner		= THIS_MODULE,
+	.nops		= 1,
+	.hooks		= {
+		[NF_BR_PRE_ROUTING]	= nft_do_chain_bridge,
+		[NF_BR_LOCAL_IN]	= nft_do_chain_bridge,
+		[NF_BR_FORWARD]		= nft_do_chain_bridge,
+		[NF_BR_LOCAL_OUT]	= nft_do_chain_bridge,
+		[NF_BR_POST_ROUTING]	= nft_do_chain_bridge,
+	},
+};
+
+static int nf_tables_bridge_init_net(struct net *net)
+{
+	net->nft.bridge = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
+	if (net->nft.bridge == NULL)
+		return -ENOMEM;
+
+	memcpy(net->nft.bridge, &nft_af_bridge, sizeof(nft_af_bridge));
+
+	if (nft_register_afinfo(net, net->nft.bridge) < 0)
+		goto err;
+
+	return 0;
+err:
+	kfree(net->nft.bridge);
+	return -ENOMEM;
+}
+
+static void nf_tables_bridge_exit_net(struct net *net)
+{
+	nft_unregister_afinfo(net->nft.bridge);
+	kfree(net->nft.bridge);
+}
+
+static struct pernet_operations nf_tables_bridge_net_ops = {
+	.init	= nf_tables_bridge_init_net,
+	.exit	= nf_tables_bridge_exit_net,
+};
+
+static const struct nf_chain_type filter_bridge = {
+	.name		= "filter",
+	.type		= NFT_CHAIN_T_DEFAULT,
+	.family		= NFPROTO_BRIDGE,
+	.owner		= THIS_MODULE,
+	.hook_mask	= (1 << NF_BR_PRE_ROUTING) |
+			  (1 << NF_BR_LOCAL_IN) |
+			  (1 << NF_BR_FORWARD) |
+			  (1 << NF_BR_LOCAL_OUT) |
+			  (1 << NF_BR_POST_ROUTING),
+};
+
+static int __init nf_tables_bridge_init(void)
+{
+	int ret;
+
+	nft_register_chain_type(&filter_bridge);
+	ret = register_pernet_subsys(&nf_tables_bridge_net_ops);
+	if (ret < 0)
+		nft_unregister_chain_type(&filter_bridge);
+
+	return ret;
+}
+
+static void __exit nf_tables_bridge_exit(void)
+{
+	unregister_pernet_subsys(&nf_tables_bridge_net_ops);
+	nft_unregister_chain_type(&filter_bridge);
+}
+
+module_init(nf_tables_bridge_init);
+module_exit(nf_tables_bridge_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_ALIAS_NFT_FAMILY(AF_BRIDGE);
diff --git a/kernel/net/bridge/netfilter/nft_meta_bridge.c b/kernel/net/bridge/netfilter/nft_meta_bridge.c
new file mode 100644
index 000000000..a21269b83
--- /dev/null
+++ b/kernel/net/bridge/netfilter/nft_meta_bridge.c
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2014 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/netlink.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nft_meta.h>
+
+#include "../br_private.h"
+
+static void nft_meta_bridge_get_eval(const struct nft_expr *expr,
+				     struct nft_regs *regs,
+				     const struct nft_pktinfo *pkt)
+{
+	const struct nft_meta *priv = nft_expr_priv(expr);
+	const struct net_device *in = pkt->in, *out = pkt->out;
+	u32 *dest = &regs->data[priv->dreg];
+	const struct net_bridge_port *p;
+
+	switch (priv->key) {
+	case NFT_META_BRI_IIFNAME:
+		if (in == NULL || (p = br_port_get_rcu(in)) == NULL)
+			goto err;
+		break;
+	case NFT_META_BRI_OIFNAME:
+		if (out == NULL || (p = br_port_get_rcu(out)) == NULL)
+			goto err;
+		break;
+	default:
+		goto out;
+	}
+
+	strncpy((char *)dest, p->br->dev->name, IFNAMSIZ);
+	return;
+out:
+	return nft_meta_get_eval(expr, regs, pkt);
+err:
+	regs->verdict.code = NFT_BREAK;
+}
+
+static int nft_meta_bridge_get_init(const struct nft_ctx *ctx,
+				    const struct nft_expr *expr,
+				    const struct nlattr * const tb[])
+{
+	struct nft_meta *priv = nft_expr_priv(expr);
+	unsigned int len;
+
+	priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
+	switch (priv->key) {
+	case NFT_META_BRI_IIFNAME:
+	case NFT_META_BRI_OIFNAME:
+		len = IFNAMSIZ;
+		break;
+	default:
+		return nft_meta_get_init(ctx, expr, tb);
+	}
+
+	priv->dreg = nft_parse_register(tb[NFTA_META_DREG]);
+	return nft_validate_register_store(ctx, priv->dreg, NULL,
+					   NFT_DATA_VALUE, len);
+}
+
+static struct nft_expr_type nft_meta_bridge_type;
+static const struct nft_expr_ops nft_meta_bridge_get_ops = {
+	.type		= &nft_meta_bridge_type,
+	.size		= NFT_EXPR_SIZE(sizeof(struct nft_meta)),
+	.eval		= nft_meta_bridge_get_eval,
+	.init		= nft_meta_bridge_get_init,
+	.dump		= nft_meta_get_dump,
+};
+
+static const struct nft_expr_ops nft_meta_bridge_set_ops = {
+	.type		= &nft_meta_bridge_type,
+	.size		= NFT_EXPR_SIZE(sizeof(struct nft_meta)),
+	.eval		= nft_meta_set_eval,
+	.init		= nft_meta_set_init,
+	.dump		= nft_meta_set_dump,
+};
+
+static const struct nft_expr_ops *
+nft_meta_bridge_select_ops(const struct nft_ctx *ctx,
+			   const struct nlattr * const tb[])
+{
+	if (tb[NFTA_META_KEY] == NULL)
+		return ERR_PTR(-EINVAL);
+
+	if (tb[NFTA_META_DREG] && tb[NFTA_META_SREG])
+		return ERR_PTR(-EINVAL);
+
+	if (tb[NFTA_META_DREG])
+		return &nft_meta_bridge_get_ops;
+
+	if (tb[NFTA_META_SREG])
+		return &nft_meta_bridge_set_ops;
+
+	return ERR_PTR(-EINVAL);
+}
+
+static struct nft_expr_type nft_meta_bridge_type __read_mostly = {
+	.family         = NFPROTO_BRIDGE,
+	.name           = "meta",
+	.select_ops     = &nft_meta_bridge_select_ops,
+	.policy         = nft_meta_policy,
+	.maxattr        = NFTA_META_MAX,
+	.owner          = THIS_MODULE,
+};
+
+static int __init nft_meta_bridge_module_init(void)
+{
+	return nft_register_expr(&nft_meta_bridge_type);
+}
+
+static void __exit nft_meta_bridge_module_exit(void)
+{
+	nft_unregister_expr(&nft_meta_bridge_type);
+}
+
+module_init(nft_meta_bridge_module_init);
+module_exit(nft_meta_bridge_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>");
+MODULE_ALIAS_NFT_AF_EXPR(AF_BRIDGE, "meta");
diff --git a/kernel/net/bridge/netfilter/nft_reject_bridge.c b/kernel/net/bridge/netfilter/nft_reject_bridge.c
new file mode 100644
index 000000000..858d84856
--- /dev/null
+++ b/kernel/net/bridge/netfilter/nft_reject_bridge.c
@@ -0,0 +1,418 @@
+/*
+ * Copyright (c) 2014 Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/netlink.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nft_reject.h>
+#include <net/netfilter/nf_tables_bridge.h>
+#include <net/netfilter/ipv4/nf_reject.h>
+#include <net/netfilter/ipv6/nf_reject.h>
+#include <linux/ip.h>
+#include <net/ip.h>
+#include <net/ip6_checksum.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/netfilter_ipv6.h>
+#include "../br_private.h"
+
+static void nft_reject_br_push_etherhdr(struct sk_buff *oldskb,
+					struct sk_buff *nskb)
+{
+	struct ethhdr *eth;
+
+	eth = (struct ethhdr *)skb_push(nskb, ETH_HLEN);
+	skb_reset_mac_header(nskb);
+	ether_addr_copy(eth->h_source, eth_hdr(oldskb)->h_dest);
+	ether_addr_copy(eth->h_dest, eth_hdr(oldskb)->h_source);
+	eth->h_proto = eth_hdr(oldskb)->h_proto;
+	skb_pull(nskb, ETH_HLEN);
+}
+
+/* We cannot use oldskb->dev, it can be either bridge device (NF_BRIDGE INPUT)
+ * or the bridge port (NF_BRIDGE PREROUTING).
+ */
+static void nft_reject_br_send_v4_tcp_reset(struct sk_buff *oldskb,
+					    const struct net_device *dev,
+					    int hook)
+{
+	struct sk_buff *nskb;
+	struct iphdr *niph;
+	const struct tcphdr *oth;
+	struct tcphdr _oth;
+
+	if (!nft_bridge_iphdr_validate(oldskb))
+		return;
+
+	oth = nf_reject_ip_tcphdr_get(oldskb, &_oth, hook);
+	if (!oth)
+		return;
+
+	nskb = alloc_skb(sizeof(struct iphdr) + sizeof(struct tcphdr) +
+			 LL_MAX_HEADER, GFP_ATOMIC);
+	if (!nskb)
+		return;
+
+	skb_reserve(nskb, LL_MAX_HEADER);
+	niph = nf_reject_iphdr_put(nskb, oldskb, IPPROTO_TCP,
+				   sysctl_ip_default_ttl);
+	nf_reject_ip_tcphdr_put(nskb, oldskb, oth);
+	niph->ttl	= sysctl_ip_default_ttl;
+	niph->tot_len	= htons(nskb->len);
+	ip_send_check(niph);
+
+	nft_reject_br_push_etherhdr(oldskb, nskb);
+
+	br_deliver(br_port_get_rcu(dev), nskb);
+}
+
+static void nft_reject_br_send_v4_unreach(struct sk_buff *oldskb,
+					  const struct net_device *dev,
+					  int hook, u8 code)
+{
+	struct sk_buff *nskb;
+	struct iphdr *niph;
+	struct icmphdr *icmph;
+	unsigned int len;
+	void *payload;
+	__wsum csum;
+	u8 proto;
+
+	if (oldskb->csum_bad || !nft_bridge_iphdr_validate(oldskb))
+		return;
+
+	/* IP header checks: fragment. */
+	if (ip_hdr(oldskb)->frag_off & htons(IP_OFFSET))
+		return;
+
+	/* RFC says return as much as we can without exceeding 576 bytes. */
+	len = min_t(unsigned int, 536, oldskb->len);
+
+	if (!pskb_may_pull(oldskb, len))
+		return;
+
+	if (pskb_trim_rcsum(oldskb, ntohs(ip_hdr(oldskb)->tot_len)))
+		return;
+
+	if (ip_hdr(oldskb)->protocol == IPPROTO_TCP ||
+	    ip_hdr(oldskb)->protocol == IPPROTO_UDP)
+		proto = ip_hdr(oldskb)->protocol;
+	else
+		proto = 0;
+
+	if (!skb_csum_unnecessary(oldskb) &&
+	    nf_ip_checksum(oldskb, hook, ip_hdrlen(oldskb), proto))
+		return;
+
+	nskb = alloc_skb(sizeof(struct iphdr) + sizeof(struct icmphdr) +
+			 LL_MAX_HEADER + len, GFP_ATOMIC);
+	if (!nskb)
+		return;
+
+	skb_reserve(nskb, LL_MAX_HEADER);
+	niph = nf_reject_iphdr_put(nskb, oldskb, IPPROTO_ICMP,
+				   sysctl_ip_default_ttl);
+
+	skb_reset_transport_header(nskb);
+	icmph = (struct icmphdr *)skb_put(nskb, sizeof(struct icmphdr));
+	memset(icmph, 0, sizeof(*icmph));
+	icmph->type     = ICMP_DEST_UNREACH;
+	icmph->code	= code;
+
+	payload = skb_put(nskb, len);
+	memcpy(payload, skb_network_header(oldskb), len);
+
+	csum = csum_partial((void *)icmph, len + sizeof(struct icmphdr), 0);
+	icmph->checksum = csum_fold(csum);
+
+	niph->tot_len	= htons(nskb->len);
+	ip_send_check(niph);
+
+	nft_reject_br_push_etherhdr(oldskb, nskb);
+
+	br_deliver(br_port_get_rcu(dev), nskb);
+}
+
+static void nft_reject_br_send_v6_tcp_reset(struct net *net,
+					    struct sk_buff *oldskb,
+					    const struct net_device *dev,
+					    int hook)
+{
+	struct sk_buff *nskb;
+	const struct tcphdr *oth;
+	struct tcphdr _oth;
+	unsigned int otcplen;
+	struct ipv6hdr *nip6h;
+
+	if (!nft_bridge_ip6hdr_validate(oldskb))
+		return;
+
+	oth = nf_reject_ip6_tcphdr_get(oldskb, &_oth, &otcplen, hook);
+	if (!oth)
+		return;
+
+	nskb = alloc_skb(sizeof(struct ipv6hdr) + sizeof(struct tcphdr) +
+			 LL_MAX_HEADER, GFP_ATOMIC);
+	if (!nskb)
+		return;
+
+	skb_reserve(nskb, LL_MAX_HEADER);
+	nip6h = nf_reject_ip6hdr_put(nskb, oldskb, IPPROTO_TCP,
+				     net->ipv6.devconf_all->hop_limit);
+	nf_reject_ip6_tcphdr_put(nskb, oldskb, oth, otcplen);
+	nip6h->payload_len = htons(nskb->len - sizeof(struct ipv6hdr));
+
+	nft_reject_br_push_etherhdr(oldskb, nskb);
+
+	br_deliver(br_port_get_rcu(dev), nskb);
+}
+
+static bool reject6_br_csum_ok(struct sk_buff *skb, int hook)
+{
+	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+	int thoff;
+	__be16 fo;
+	u8 proto = ip6h->nexthdr;
+
+	if (skb->csum_bad)
+		return false;
+
+	if (skb_csum_unnecessary(skb))
+		return true;
+
+	if (ip6h->payload_len &&
+	    pskb_trim_rcsum(skb, ntohs(ip6h->payload_len) + sizeof(*ip6h)))
+		return false;
+
+	thoff = ipv6_skip_exthdr(skb, ((u8*)(ip6h+1) - skb->data), &proto, &fo);
+	if (thoff < 0 || thoff >= skb->len || (fo & htons(~0x7)) != 0)
+		return false;
+
+	return nf_ip6_checksum(skb, hook, thoff, proto) == 0;
+}
+
+static void nft_reject_br_send_v6_unreach(struct net *net,
+					  struct sk_buff *oldskb,
+					  const struct net_device *dev,
+					  int hook, u8 code)
+{
+	struct sk_buff *nskb;
+	struct ipv6hdr *nip6h;
+	struct icmp6hdr *icmp6h;
+	unsigned int len;
+	void *payload;
+
+	if (!nft_bridge_ip6hdr_validate(oldskb))
+		return;
+
+	/* Include "As much of invoking packet as possible without the ICMPv6
+	 * packet exceeding the minimum IPv6 MTU" in the ICMP payload.
+	 */
+	len = min_t(unsigned int, 1220, oldskb->len);
+
+	if (!pskb_may_pull(oldskb, len))
+		return;
+
+	if (!reject6_br_csum_ok(oldskb, hook))
+		return;
+
+	nskb = alloc_skb(sizeof(struct iphdr) + sizeof(struct icmp6hdr) +
+			 LL_MAX_HEADER + len, GFP_ATOMIC);
+	if (!nskb)
+		return;
+
+	skb_reserve(nskb, LL_MAX_HEADER);
+	nip6h = nf_reject_ip6hdr_put(nskb, oldskb, IPPROTO_ICMPV6,
+				     net->ipv6.devconf_all->hop_limit);
+
+	skb_reset_transport_header(nskb);
+	icmp6h = (struct icmp6hdr *)skb_put(nskb, sizeof(struct icmp6hdr));
+	memset(icmp6h, 0, sizeof(*icmp6h));
+	icmp6h->icmp6_type = ICMPV6_DEST_UNREACH;
+	icmp6h->icmp6_code = code;
+
+	payload = skb_put(nskb, len);
+	memcpy(payload, skb_network_header(oldskb), len);
+	nip6h->payload_len = htons(nskb->len - sizeof(struct ipv6hdr));
+
+	icmp6h->icmp6_cksum =
+		csum_ipv6_magic(&nip6h->saddr, &nip6h->daddr,
+				nskb->len - sizeof(struct ipv6hdr),
+				IPPROTO_ICMPV6,
+				csum_partial(icmp6h,
+					     nskb->len - sizeof(struct ipv6hdr),
+					     0));
+
+	nft_reject_br_push_etherhdr(oldskb, nskb);
+
+	br_deliver(br_port_get_rcu(dev), nskb);
+}
+
+static void nft_reject_bridge_eval(const struct nft_expr *expr,
+				   struct nft_regs *regs,
+				   const struct nft_pktinfo *pkt)
+{
+	struct nft_reject *priv = nft_expr_priv(expr);
+	struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out);
+	const unsigned char *dest = eth_hdr(pkt->skb)->h_dest;
+
+	if (is_broadcast_ether_addr(dest) ||
+	    is_multicast_ether_addr(dest))
+		goto out;
+
+	switch (eth_hdr(pkt->skb)->h_proto) {
+	case htons(ETH_P_IP):
+		switch (priv->type) {
+		case NFT_REJECT_ICMP_UNREACH:
+			nft_reject_br_send_v4_unreach(pkt->skb, pkt->in,
+						      pkt->ops->hooknum,
+						      priv->icmp_code);
+			break;
+		case NFT_REJECT_TCP_RST:
+			nft_reject_br_send_v4_tcp_reset(pkt->skb, pkt->in,
+							pkt->ops->hooknum);
+			break;
+		case NFT_REJECT_ICMPX_UNREACH:
+			nft_reject_br_send_v4_unreach(pkt->skb, pkt->in,
+						      pkt->ops->hooknum,
+						      nft_reject_icmp_code(priv->icmp_code));
+			break;
+		}
+		break;
+	case htons(ETH_P_IPV6):
+		switch (priv->type) {
+		case NFT_REJECT_ICMP_UNREACH:
+			nft_reject_br_send_v6_unreach(net, pkt->skb, pkt->in,
+						      pkt->ops->hooknum,
+						      priv->icmp_code);
+			break;
+		case NFT_REJECT_TCP_RST:
+			nft_reject_br_send_v6_tcp_reset(net, pkt->skb, pkt->in,
+							pkt->ops->hooknum);
+			break;
+		case NFT_REJECT_ICMPX_UNREACH:
+			nft_reject_br_send_v6_unreach(net, pkt->skb, pkt->in,
+						      pkt->ops->hooknum,
+						      nft_reject_icmpv6_code(priv->icmp_code));
+			break;
+		}
+		break;
+	default:
+		/* No explicit way to reject this protocol, drop it. */
+		break;
+	}
+out:
+	regs->verdict.code = NF_DROP;
+}
+
+static int nft_reject_bridge_validate(const struct nft_ctx *ctx,
+				      const struct nft_expr *expr,
+				      const struct nft_data **data)
+{
+	return nft_chain_validate_hooks(ctx->chain, (1 << NF_BR_PRE_ROUTING) |
+						    (1 << NF_BR_LOCAL_IN));
+}
+
+static int nft_reject_bridge_init(const struct nft_ctx *ctx,
+				  const struct nft_expr *expr,
+				  const struct nlattr * const tb[])
+{
+	struct nft_reject *priv = nft_expr_priv(expr);
+	int icmp_code, err;
+
+	err = nft_reject_bridge_validate(ctx, expr, NULL);
+	if (err < 0)
+		return err;
+
+	if (tb[NFTA_REJECT_TYPE] == NULL)
+		return -EINVAL;
+
+	priv->type = ntohl(nla_get_be32(tb[NFTA_REJECT_TYPE]));
+	switch (priv->type) {
+	case NFT_REJECT_ICMP_UNREACH:
+	case NFT_REJECT_ICMPX_UNREACH:
+		if (tb[NFTA_REJECT_ICMP_CODE] == NULL)
+			return -EINVAL;
+
+		icmp_code = nla_get_u8(tb[NFTA_REJECT_ICMP_CODE]);
+		if (priv->type == NFT_REJECT_ICMPX_UNREACH &&
+		    icmp_code > NFT_REJECT_ICMPX_MAX)
+			return -EINVAL;
+
+		priv->icmp_code = icmp_code;
+		break;
+	case NFT_REJECT_TCP_RST:
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int nft_reject_bridge_dump(struct sk_buff *skb,
+				  const struct nft_expr *expr)
+{
+	const struct nft_reject *priv = nft_expr_priv(expr);
+
+	if (nla_put_be32(skb, NFTA_REJECT_TYPE, htonl(priv->type)))
+		goto nla_put_failure;
+
+	switch (priv->type) {
+	case NFT_REJECT_ICMP_UNREACH:
+	case NFT_REJECT_ICMPX_UNREACH:
+		if (nla_put_u8(skb, NFTA_REJECT_ICMP_CODE, priv->icmp_code))
+			goto nla_put_failure;
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -1;
+}
+
+static struct nft_expr_type nft_reject_bridge_type;
+static const struct nft_expr_ops nft_reject_bridge_ops = {
+	.type		= &nft_reject_bridge_type,
+	.size		= NFT_EXPR_SIZE(sizeof(struct nft_reject)),
+	.eval		= nft_reject_bridge_eval,
+	.init		= nft_reject_bridge_init,
+	.dump		= nft_reject_bridge_dump,
+	.validate	= nft_reject_bridge_validate,
+};
+
+static struct nft_expr_type nft_reject_bridge_type __read_mostly = {
+	.family		= NFPROTO_BRIDGE,
+	.name		= "reject",
+	.ops		= &nft_reject_bridge_ops,
+	.policy		= nft_reject_policy,
+	.maxattr	= NFTA_REJECT_MAX,
+	.owner		= THIS_MODULE,
+};
+
+static int __init nft_reject_bridge_module_init(void)
+{
+	return nft_register_expr(&nft_reject_bridge_type);
+}
+
+static void __exit nft_reject_bridge_module_exit(void)
+{
+	nft_unregister_expr(&nft_reject_bridge_type);
+}
+
+module_init(nft_reject_bridge_module_init);
+module_exit(nft_reject_bridge_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
+MODULE_ALIAS_NFT_AF_EXPR(AF_BRIDGE, "reject");