Initial import

1 files changed, 1606 insertions, 0 deletions

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
new file mode 100644
index 000000000..9f59f17dc
--- /dev/null
+++ b/drivers/net/macvlan.c
@@ -0,0 +1,1606 @@
+/*
+ * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * The code this is based on carried the following copyright notice:
+ * ---
+ * (C) Copyright 2001-2006
+ * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com
+ * Re-worked by Ben Greear <greearb@candelatech.com>
+ * ---
+ */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/rculist.h>
+#include <linux/notifier.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_arp.h>
+#include <linux/if_vlan.h>
+#include <linux/if_link.h>
+#include <linux/if_macvlan.h>
+#include <linux/hash.h>
+#include <linux/workqueue.h>
+#include <net/rtnetlink.h>
+#include <net/xfrm.h>
+#include <linux/netpoll.h>
+
+#define MACVLAN_HASH_BITS	8
+#define MACVLAN_HASH_SIZE	(1<<MACVLAN_HASH_BITS)
+#define MACVLAN_BC_QUEUE_LEN	1000
+
+struct macvlan_port {
+	struct net_device	*dev;
+	struct hlist_head	vlan_hash[MACVLAN_HASH_SIZE];
+	struct list_head	vlans;
+	struct rcu_head		rcu;
+	struct sk_buff_head	bc_queue;
+	struct work_struct	bc_work;
+	bool 			passthru;
+	int			count;
+	struct hlist_head	vlan_source_hash[MACVLAN_HASH_SIZE];
+};
+
+struct macvlan_source_entry {
+	struct hlist_node	hlist;
+	struct macvlan_dev	*vlan;
+	unsigned char		addr[6+2] __aligned(sizeof(u16));
+	struct rcu_head		rcu;
+};
+
+struct macvlan_skb_cb {
+	const struct macvlan_dev *src;
+};
+
+#define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
+
+static void macvlan_port_destroy(struct net_device *dev);
+
+/* Hash Ethernet address */
+static u32 macvlan_eth_hash(const unsigned char *addr)
+{
+	u64 value = get_unaligned((u64 *)addr);
+
+	/* only want 6 bytes */
+#ifdef __BIG_ENDIAN
+	value >>= 16;
+#else
+	value <<= 16;
+#endif
+	return hash_64(value, MACVLAN_HASH_BITS);
+}
+
+static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
+{
+	return rcu_dereference(dev->rx_handler_data);
+}
+
+static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev)
+{
+	return rtnl_dereference(dev->rx_handler_data);
+}
+
+#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
+
+static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
+					       const unsigned char *addr)
+{
+	struct macvlan_dev *vlan;
+	u32 idx = macvlan_eth_hash(addr);
+
+	hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) {
+		if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr))
+			return vlan;
+	}
+	return NULL;
+}
+
+static struct macvlan_source_entry *macvlan_hash_lookup_source(
+	const struct macvlan_dev *vlan,
+	const unsigned char *addr)
+{
+	struct macvlan_source_entry *entry;
+	u32 idx = macvlan_eth_hash(addr);
+	struct hlist_head *h = &vlan->port->vlan_source_hash[idx];
+
+	hlist_for_each_entry_rcu(entry, h, hlist) {
+		if (ether_addr_equal_64bits(entry->addr, addr) &&
+		    entry->vlan == vlan)
+			return entry;
+	}
+	return NULL;
+}
+
+static int macvlan_hash_add_source(struct macvlan_dev *vlan,
+				   const unsigned char *addr)
+{
+	struct macvlan_port *port = vlan->port;
+	struct macvlan_source_entry *entry;
+	struct hlist_head *h;
+
+	entry = macvlan_hash_lookup_source(vlan, addr);
+	if (entry)
+		return 0;
+
+	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+	if (!entry)
+		return -ENOMEM;
+
+	ether_addr_copy(entry->addr, addr);
+	entry->vlan = vlan;
+	h = &port->vlan_source_hash[macvlan_eth_hash(addr)];
+	hlist_add_head_rcu(&entry->hlist, h);
+	vlan->macaddr_count++;
+
+	return 0;
+}
+
+static void macvlan_hash_add(struct macvlan_dev *vlan)
+{
+	struct macvlan_port *port = vlan->port;
+	const unsigned char *addr = vlan->dev->dev_addr;
+	u32 idx = macvlan_eth_hash(addr);
+
+	hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]);
+}
+
+static void macvlan_hash_del_source(struct macvlan_source_entry *entry)
+{
+	hlist_del_rcu(&entry->hlist);
+	kfree_rcu(entry, rcu);
+}
+
+static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
+{
+	hlist_del_rcu(&vlan->hlist);
+	if (sync)
+		synchronize_rcu();
+}
+
+static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
+					const unsigned char *addr)
+{
+	macvlan_hash_del(vlan, true);
+	/* Now that we are unhashed it is safe to change the device
+	 * address without confusing packet delivery.
+	 */
+	memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
+	macvlan_hash_add(vlan);
+}
+
+static int macvlan_addr_busy(const struct macvlan_port *port,
+				const unsigned char *addr)
+{
+	/* Test to see if the specified multicast address is
+	 * currently in use by the underlying device or
+	 * another macvlan.
+	 */
+	if (ether_addr_equal_64bits(port->dev->dev_addr, addr))
+		return 1;
+
+	if (macvlan_hash_lookup(port, addr))
+		return 1;
+
+	return 0;
+}
+
+
+static int macvlan_broadcast_one(struct sk_buff *skb,
+				 const struct macvlan_dev *vlan,
+				 const struct ethhdr *eth, bool local)
+{
+	struct net_device *dev = vlan->dev;
+
+	if (local)
+		return __dev_forward_skb(dev, skb);
+
+	skb->dev = dev;
+	if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
+		skb->pkt_type = PACKET_BROADCAST;
+	else
+		skb->pkt_type = PACKET_MULTICAST;
+
+	return 0;
+}
+
+static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
+{
+	return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT);
+}
+
+
+static unsigned int mc_hash(const struct macvlan_dev *vlan,
+			    const unsigned char *addr)
+{
+	u32 val = __get_unaligned_cpu32(addr + 2);
+
+	val ^= macvlan_hash_mix(vlan);
+	return hash_32(val, MACVLAN_MC_FILTER_BITS);
+}
+
+static void macvlan_broadcast(struct sk_buff *skb,
+			      const struct macvlan_port *port,
+			      struct net_device *src,
+			      enum macvlan_mode mode)
+{
+	const struct ethhdr *eth = eth_hdr(skb);
+	const struct macvlan_dev *vlan;
+	struct sk_buff *nskb;
+	unsigned int i;
+	int err;
+	unsigned int hash;
+
+	if (skb->protocol == htons(ETH_P_PAUSE))
+		return;
+
+	for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
+		hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) {
+			if (vlan->dev == src || !(vlan->mode & mode))
+				continue;
+
+			hash = mc_hash(vlan, eth->h_dest);
+			if (!test_bit(hash, vlan->mc_filter))
+				continue;
+
+			err = NET_RX_DROP;
+			nskb = skb_clone(skb, GFP_ATOMIC);
+			if (likely(nskb))
+				err = macvlan_broadcast_one(
+					nskb, vlan, eth,
+					mode == MACVLAN_MODE_BRIDGE) ?:
+				      netif_rx_ni(nskb);
+			macvlan_count_rx(vlan, skb->len + ETH_HLEN,
+					 err == NET_RX_SUCCESS, true);
+		}
+	}
+}
+
+static void macvlan_process_broadcast(struct work_struct *w)
+{
+	struct macvlan_port *port = container_of(w, struct macvlan_port,
+						 bc_work);
+	struct sk_buff *skb;
+	struct sk_buff_head list;
+
+	__skb_queue_head_init(&list);
+
+	spin_lock_bh(&port->bc_queue.lock);
+	skb_queue_splice_tail_init(&port->bc_queue, &list);
+	spin_unlock_bh(&port->bc_queue.lock);
+
+	while ((skb = __skb_dequeue(&list))) {
+		const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
+
+		rcu_read_lock();
+
+		if (!src)
+			/* frame comes from an external address */
+			macvlan_broadcast(skb, port, NULL,
+					  MACVLAN_MODE_PRIVATE |
+					  MACVLAN_MODE_VEPA    |
+					  MACVLAN_MODE_PASSTHRU|
+					  MACVLAN_MODE_BRIDGE);
+		else if (src->mode == MACVLAN_MODE_VEPA)
+			/* flood to everyone except source */
+			macvlan_broadcast(skb, port, src->dev,
+					  MACVLAN_MODE_VEPA |
+					  MACVLAN_MODE_BRIDGE);
+		else
+			/*
+			 * flood only to VEPA ports, bridge ports
+			 * already saw the frame on the way out.
+			 */
+			macvlan_broadcast(skb, port, src->dev,
+					  MACVLAN_MODE_VEPA);
+
+		rcu_read_unlock();
+
+		kfree_skb(skb);
+	}
+}
+
+static void macvlan_broadcast_enqueue(struct macvlan_port *port,
+				      struct sk_buff *skb)
+{
+	struct sk_buff *nskb;
+	int err = -ENOMEM;
+
+	nskb = skb_clone(skb, GFP_ATOMIC);
+	if (!nskb)
+		goto err;
+
+	spin_lock(&port->bc_queue.lock);
+	if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) {
+		__skb_queue_tail(&port->bc_queue, nskb);
+		err = 0;
+	}
+	spin_unlock(&port->bc_queue.lock);
+
+	if (err)
+		goto free_nskb;
+
+	schedule_work(&port->bc_work);
+	return;
+
+free_nskb:
+	kfree_skb(nskb);
+err:
+	atomic_long_inc(&skb->dev->rx_dropped);
+}
+
+static void macvlan_flush_sources(struct macvlan_port *port,
+				  struct macvlan_dev *vlan)
+{
+	int i;
+
+	for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
+		struct hlist_node *h, *n;
+
+		hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) {
+			struct macvlan_source_entry *entry;
+
+			entry = hlist_entry(h, struct macvlan_source_entry,
+					    hlist);
+			if (entry->vlan == vlan)
+				macvlan_hash_del_source(entry);
+		}
+	}
+	vlan->macaddr_count = 0;
+}
+
+static void macvlan_forward_source_one(struct sk_buff *skb,
+				       struct macvlan_dev *vlan)
+{
+	struct sk_buff *nskb;
+	struct net_device *dev;
+	int len;
+	int ret;
+
+	dev = vlan->dev;
+	if (unlikely(!(dev->flags & IFF_UP)))
+		return;
+
+	nskb = skb_clone(skb, GFP_ATOMIC);
+	if (!nskb)
+		return;
+
+	len = nskb->len + ETH_HLEN;
+	nskb->dev = dev;
+	nskb->pkt_type = PACKET_HOST;
+
+	ret = netif_rx(nskb);
+	macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
+}
+
+static void macvlan_forward_source(struct sk_buff *skb,
+				   struct macvlan_port *port,
+				   const unsigned char *addr)
+{
+	struct macvlan_source_entry *entry;
+	u32 idx = macvlan_eth_hash(addr);
+	struct hlist_head *h = &port->vlan_source_hash[idx];
+
+	hlist_for_each_entry_rcu(entry, h, hlist) {
+		if (ether_addr_equal_64bits(entry->addr, addr))
+			if (entry->vlan->dev->flags & IFF_UP)
+				macvlan_forward_source_one(skb, entry->vlan);
+	}
+}
+
+/* called under rcu_read_lock() from netif_receive_skb */
+static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
+{
+	struct macvlan_port *port;
+	struct sk_buff *skb = *pskb;
+	const struct ethhdr *eth = eth_hdr(skb);
+	const struct macvlan_dev *vlan;
+	const struct macvlan_dev *src;
+	struct net_device *dev;
+	unsigned int len = 0;
+	int ret;
+	rx_handler_result_t handle_res;
+
+	port = macvlan_port_get_rcu(skb->dev);
+	if (is_multicast_ether_addr(eth->h_dest)) {
+		skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
+		if (!skb)
+			return RX_HANDLER_CONSUMED;
+		eth = eth_hdr(skb);
+		macvlan_forward_source(skb, port, eth->h_source);
+		src = macvlan_hash_lookup(port, eth->h_source);
+		if (src && src->mode != MACVLAN_MODE_VEPA &&
+		    src->mode != MACVLAN_MODE_BRIDGE) {
+			/* forward to original port. */
+			vlan = src;
+			ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?:
+			      netif_rx(skb);
+			handle_res = RX_HANDLER_CONSUMED;
+			goto out;
+		}
+
+		MACVLAN_SKB_CB(skb)->src = src;
+		macvlan_broadcast_enqueue(port, skb);
+
+		return RX_HANDLER_PASS;
+	}
+
+	macvlan_forward_source(skb, port, eth->h_source);
+	if (port->passthru)
+		vlan = list_first_or_null_rcu(&port->vlans,
+					      struct macvlan_dev, list);
+	else
+		vlan = macvlan_hash_lookup(port, eth->h_dest);
+	if (vlan == NULL)
+		return RX_HANDLER_PASS;
+
+	dev = vlan->dev;
+	if (unlikely(!(dev->flags & IFF_UP))) {
+		kfree_skb(skb);
+		return RX_HANDLER_CONSUMED;
+	}
+	len = skb->len + ETH_HLEN;
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb) {
+		ret = NET_RX_DROP;
+		handle_res = RX_HANDLER_CONSUMED;
+		goto out;
+	}
+
+	skb->dev = dev;
+	skb->pkt_type = PACKET_HOST;
+
+	ret = NET_RX_SUCCESS;
+	handle_res = RX_HANDLER_ANOTHER;
+out:
+	macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
+	return handle_res;
+}
+
+static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	const struct macvlan_dev *vlan = netdev_priv(dev);
+	const struct macvlan_port *port = vlan->port;
+	const struct macvlan_dev *dest;
+
+	if (vlan->mode == MACVLAN_MODE_BRIDGE) {
+		const struct ethhdr *eth = (void *)skb->data;
+
+		/* send to other bridge ports directly */
+		if (is_multicast_ether_addr(eth->h_dest)) {
+			macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
+			goto xmit_world;
+		}
+
+		dest = macvlan_hash_lookup(port, eth->h_dest);
+		if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
+			/* send to lowerdev first for its network taps */
+			dev_forward_skb(vlan->lowerdev, skb);
+
+			return NET_XMIT_SUCCESS;
+		}
+	}
+
+xmit_world:
+	skb->dev = vlan->lowerdev;
+	return dev_queue_xmit(skb);
+}
+
+static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb)
+{
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	if (vlan->netpoll)
+		netpoll_send_skb(vlan->netpoll, skb);
+#else
+	BUG();
+#endif
+	return NETDEV_TX_OK;
+}
+
+static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
+				      struct net_device *dev)
+{
+	unsigned int len = skb->len;
+	int ret;
+	struct macvlan_dev *vlan = netdev_priv(dev);
+
+	if (unlikely(netpoll_tx_running(dev)))
+		return macvlan_netpoll_send_skb(vlan, skb);
+
+	if (vlan->fwd_priv) {
+		skb->dev = vlan->lowerdev;
+		ret = dev_queue_xmit_accel(skb, vlan->fwd_priv);
+	} else {
+		ret = macvlan_queue_xmit(skb, dev);
+	}
+
+	if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
+		struct vlan_pcpu_stats *pcpu_stats;
+
+		pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
+		u64_stats_update_begin(&pcpu_stats->syncp);
+		pcpu_stats->tx_packets++;
+		pcpu_stats->tx_bytes += len;
+		u64_stats_update_end(&pcpu_stats->syncp);
+	} else {
+		this_cpu_inc(vlan->pcpu_stats->tx_dropped);
+	}
+	return ret;
+}
+
+static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
+			       unsigned short type, const void *daddr,
+			       const void *saddr, unsigned len)
+{
+	const struct macvlan_dev *vlan = netdev_priv(dev);
+	struct net_device *lowerdev = vlan->lowerdev;
+
+	return dev_hard_header(skb, lowerdev, type, daddr,
+			       saddr ? : dev->dev_addr, len);
+}
+
+static const struct header_ops macvlan_hard_header_ops = {
+	.create  	= macvlan_hard_header,
+	.parse		= eth_header_parse,
+	.cache		= eth_header_cache,
+	.cache_update	= eth_header_cache_update,
+};
+
+static struct rtnl_link_ops macvlan_link_ops;
+
+static int macvlan_open(struct net_device *dev)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct net_device *lowerdev = vlan->lowerdev;
+	int err;
+
+	if (vlan->port->passthru) {
+		if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
+			err = dev_set_promiscuity(lowerdev, 1);
+			if (err < 0)
+				goto out;
+		}
+		goto hash_add;
+	}
+
+	if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD &&
+	    dev->rtnl_link_ops == &macvlan_link_ops) {
+		vlan->fwd_priv =
+		      lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);
+
+		/* If we get a NULL pointer back, or if we get an error
+		 * then we should just fall through to the non accelerated path
+		 */
+		if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
+			vlan->fwd_priv = NULL;
+		} else
+			return 0;
+	}
+
+	err = -EBUSY;
+	if (macvlan_addr_busy(vlan->port, dev->dev_addr))
+		goto out;
+
+	err = dev_uc_add(lowerdev, dev->dev_addr);
+	if (err < 0)
+		goto out;
+	if (dev->flags & IFF_ALLMULTI) {
+		err = dev_set_allmulti(lowerdev, 1);
+		if (err < 0)
+			goto del_unicast;
+	}
+
+	if (dev->flags & IFF_PROMISC) {
+		err = dev_set_promiscuity(lowerdev, 1);
+		if (err < 0)
+			goto clear_multi;
+	}
+
+hash_add:
+	macvlan_hash_add(vlan);
+	return 0;
+
+clear_multi:
+	dev_set_allmulti(lowerdev, -1);
+del_unicast:
+	dev_uc_del(lowerdev, dev->dev_addr);
+out:
+	if (vlan->fwd_priv) {
+		lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
+							   vlan->fwd_priv);
+		vlan->fwd_priv = NULL;
+	}
+	return err;
+}
+
+static int macvlan_stop(struct net_device *dev)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct net_device *lowerdev = vlan->lowerdev;
+
+	if (vlan->fwd_priv) {
+		lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
+							   vlan->fwd_priv);
+		vlan->fwd_priv = NULL;
+		return 0;
+	}
+
+	dev_uc_unsync(lowerdev, dev);
+	dev_mc_unsync(lowerdev, dev);
+
+	if (vlan->port->passthru) {
+		if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
+			dev_set_promiscuity(lowerdev, -1);
+		goto hash_del;
+	}
+
+	if (dev->flags & IFF_ALLMULTI)
+		dev_set_allmulti(lowerdev, -1);
+
+	if (dev->flags & IFF_PROMISC)
+		dev_set_promiscuity(lowerdev, -1);
+
+	dev_uc_del(lowerdev, dev->dev_addr);
+
+hash_del:
+	macvlan_hash_del(vlan, !dev->dismantle);
+	return 0;
+}
+
+static int macvlan_sync_address(struct net_device *dev, unsigned char *addr)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct net_device *lowerdev = vlan->lowerdev;
+	int err;
+
+	if (!(dev->flags & IFF_UP)) {
+		/* Just copy in the new address */
+		ether_addr_copy(dev->dev_addr, addr);
+	} else {
+		/* Rehash and update the device filters */
+		if (macvlan_addr_busy(vlan->port, addr))
+			return -EBUSY;
+
+		if (!vlan->port->passthru) {
+			err = dev_uc_add(lowerdev, addr);
+			if (err)
+				return err;
+
+			dev_uc_del(lowerdev, dev->dev_addr);
+		}
+
+		macvlan_hash_change_addr(vlan, addr);
+	}
+	return 0;
+}
+
+static int macvlan_set_mac_address(struct net_device *dev, void *p)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct sockaddr *addr = p;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
+		dev_set_mac_address(vlan->lowerdev, addr);
+		return 0;
+	}
+
+	return macvlan_sync_address(dev, addr->sa_data);
+}
+
+static void macvlan_change_rx_flags(struct net_device *dev, int change)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct net_device *lowerdev = vlan->lowerdev;
+
+	if (dev->flags & IFF_UP) {
+		if (change & IFF_ALLMULTI)
+			dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
+		if (change & IFF_PROMISC)
+			dev_set_promiscuity(lowerdev,
+					    dev->flags & IFF_PROMISC ? 1 : -1);
+
+	}
+}
+
+static void macvlan_set_mac_lists(struct net_device *dev)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+
+	if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
+		bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ);
+	} else {
+		struct netdev_hw_addr *ha;
+		DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
+
+		bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
+		netdev_for_each_mc_addr(ha, dev) {
+			__set_bit(mc_hash(vlan, ha->addr), filter);
+		}
+
+		__set_bit(mc_hash(vlan, dev->broadcast), filter);
+
+		bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ);
+	}
+	dev_uc_sync(vlan->lowerdev, dev);
+	dev_mc_sync(vlan->lowerdev, dev);
+}
+
+static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+
+	if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
+		return -EINVAL;
+	dev->mtu = new_mtu;
+	return 0;
+}
+
+/*
+ * macvlan network devices have devices nesting below it and are a special
+ * "super class" of normal network devices; split their locks off into a
+ * separate class since they always nest.
+ */
+static struct lock_class_key macvlan_netdev_xmit_lock_key;
+static struct lock_class_key macvlan_netdev_addr_lock_key;
+
+#define ALWAYS_ON_FEATURES \
+	(NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \
+	 NETIF_F_GSO_ROBUST)
+
+#define MACVLAN_FEATURES \
+	(NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
+	 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \
+	 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
+	 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
+
+#define MACVLAN_STATE_MASK \
+	((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
+
+static int macvlan_get_nest_level(struct net_device *dev)
+{
+	return ((struct macvlan_dev *)netdev_priv(dev))->nest_level;
+}
+
+static void macvlan_set_lockdep_class_one(struct net_device *dev,
+					  struct netdev_queue *txq,
+					  void *_unused)
+{
+	lockdep_set_class(&txq->_xmit_lock,
+			  &macvlan_netdev_xmit_lock_key);
+}
+
+static void macvlan_set_lockdep_class(struct net_device *dev)
+{
+	lockdep_set_class_and_subclass(&dev->addr_list_lock,
+				       &macvlan_netdev_addr_lock_key,
+				       macvlan_get_nest_level(dev));
+	netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
+}
+
+static int macvlan_init(struct net_device *dev)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	const struct net_device *lowerdev = vlan->lowerdev;
+
+	dev->state		= (dev->state & ~MACVLAN_STATE_MASK) |
+				  (lowerdev->state & MACVLAN_STATE_MASK);
+	dev->features 		= lowerdev->features & MACVLAN_FEATURES;
+	dev->features		|= ALWAYS_ON_FEATURES;
+	dev->hw_features	|= NETIF_F_LRO;
+	dev->vlan_features	= lowerdev->vlan_features & MACVLAN_FEATURES;
+	dev->gso_max_size	= lowerdev->gso_max_size;
+	dev->hard_header_len	= lowerdev->hard_header_len;
+
+	macvlan_set_lockdep_class(dev);
+
+	vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
+	if (!vlan->pcpu_stats)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void macvlan_uninit(struct net_device *dev)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct macvlan_port *port = vlan->port;
+
+	free_percpu(vlan->pcpu_stats);
+
+	macvlan_flush_sources(port, vlan);
+	port->count -= 1;
+	if (!port->count)
+		macvlan_port_destroy(port->dev);
+}
+
+static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
+							 struct rtnl_link_stats64 *stats)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+
+	if (vlan->pcpu_stats) {
+		struct vlan_pcpu_stats *p;
+		u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
+		u32 rx_errors = 0, tx_dropped = 0;
+		unsigned int start;
+		int i;
+
+		for_each_possible_cpu(i) {
+			p = per_cpu_ptr(vlan->pcpu_stats, i);
+			do {
+				start = u64_stats_fetch_begin_irq(&p->syncp);
+				rx_packets	= p->rx_packets;
+				rx_bytes	= p->rx_bytes;
+				rx_multicast	= p->rx_multicast;
+				tx_packets	= p->tx_packets;
+				tx_bytes	= p->tx_bytes;
+			} while (u64_stats_fetch_retry_irq(&p->syncp, start));
+
+			stats->rx_packets	+= rx_packets;
+			stats->rx_bytes		+= rx_bytes;
+			stats->multicast	+= rx_multicast;
+			stats->tx_packets	+= tx_packets;
+			stats->tx_bytes		+= tx_bytes;
+			/* rx_errors & tx_dropped are u32, updated
+			 * without syncp protection.
+			 */
+			rx_errors	+= p->rx_errors;
+			tx_dropped	+= p->tx_dropped;
+		}
+		stats->rx_errors	= rx_errors;
+		stats->rx_dropped	= rx_errors;
+		stats->tx_dropped	= tx_dropped;
+	}
+	return stats;
+}
+
+static int macvlan_vlan_rx_add_vid(struct net_device *dev,
+				   __be16 proto, u16 vid)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct net_device *lowerdev = vlan->lowerdev;
+
+	return vlan_vid_add(lowerdev, proto, vid);
+}
+
+static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
+				    __be16 proto, u16 vid)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct net_device *lowerdev = vlan->lowerdev;
+
+	vlan_vid_del(lowerdev, proto, vid);
+	return 0;
+}
+
+static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
+			   struct net_device *dev,
+			   const unsigned char *addr, u16 vid,
+			   u16 flags)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	int err = -EINVAL;
+
+	/* Support unicast filter only on passthru devices.
+	 * Multicast filter should be allowed on all devices.
+	 */
+	if (!vlan->port->passthru && is_unicast_ether_addr(addr))
+		return -EOPNOTSUPP;
+
+	if (flags & NLM_F_REPLACE)
+		return -EOPNOTSUPP;
+
+	if (is_unicast_ether_addr(addr))
+		err = dev_uc_add_excl(dev, addr);
+	else if (is_multicast_ether_addr(addr))
+		err = dev_mc_add_excl(dev, addr);
+
+	return err;
+}
+
+static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
+			   struct net_device *dev,
+			   const unsigned char *addr, u16 vid)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	int err = -EINVAL;
+
+	/* Support unicast filter only on passthru devices.
+	 * Multicast filter should be allowed on all devices.
+	 */
+	if (!vlan->port->passthru && is_unicast_ether_addr(addr))
+		return -EOPNOTSUPP;
+
+	if (is_unicast_ether_addr(addr))
+		err = dev_uc_del(dev, addr);
+	else if (is_multicast_ether_addr(addr))
+		err = dev_mc_del(dev, addr);
+
+	return err;
+}
+
+static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
+					struct ethtool_drvinfo *drvinfo)
+{
+	strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
+	strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
+}
+
+static int macvlan_ethtool_get_settings(struct net_device *dev,
+					struct ethtool_cmd *cmd)
+{
+	const struct macvlan_dev *vlan = netdev_priv(dev);
+
+	return __ethtool_get_settings(vlan->lowerdev, cmd);
+}
+
+static netdev_features_t macvlan_fix_features(struct net_device *dev,
+					      netdev_features_t features)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	netdev_features_t lowerdev_features = vlan->lowerdev->features;
+	netdev_features_t mask;
+
+	features |= NETIF_F_ALL_FOR_ALL;
+	features &= (vlan->set_features | ~MACVLAN_FEATURES);
+	mask = features;
+
+	lowerdev_features &= (features | ~NETIF_F_LRO);
+	features = netdev_increment_features(lowerdev_features, features, mask);
+	features |= ALWAYS_ON_FEATURES;
+	features &= ~NETIF_F_NETNS_LOCAL;
+
+	return features;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void macvlan_dev_poll_controller(struct net_device *dev)
+{
+	return;
+}
+
+static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct net_device *real_dev = vlan->lowerdev;
+	struct netpoll *netpoll;
+	int err = 0;
+
+	netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
+	err = -ENOMEM;
+	if (!netpoll)
+		goto out;
+
+	err = __netpoll_setup(netpoll, real_dev);
+	if (err) {
+		kfree(netpoll);
+		goto out;
+	}
+
+	vlan->netpoll = netpoll;
+
+out:
+	return err;
+}
+
+static void macvlan_dev_netpoll_cleanup(struct net_device *dev)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct netpoll *netpoll = vlan->netpoll;
+
+	if (!netpoll)
+		return;
+
+	vlan->netpoll = NULL;
+
+	__netpoll_free_async(netpoll);
+}
+#endif	/* CONFIG_NET_POLL_CONTROLLER */
+
+static int macvlan_dev_get_iflink(const struct net_device *dev)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+
+	return vlan->lowerdev->ifindex;
+}
+
+static const struct ethtool_ops macvlan_ethtool_ops = {
+	.get_link		= ethtool_op_get_link,
+	.get_settings		= macvlan_ethtool_get_settings,
+	.get_drvinfo		= macvlan_ethtool_get_drvinfo,
+};
+
+static const struct net_device_ops macvlan_netdev_ops = {
+	.ndo_init		= macvlan_init,
+	.ndo_uninit		= macvlan_uninit,
+	.ndo_open		= macvlan_open,
+	.ndo_stop		= macvlan_stop,
+	.ndo_start_xmit		= macvlan_start_xmit,
+	.ndo_change_mtu		= macvlan_change_mtu,
+	.ndo_fix_features	= macvlan_fix_features,
+	.ndo_change_rx_flags	= macvlan_change_rx_flags,
+	.ndo_set_mac_address	= macvlan_set_mac_address,
+	.ndo_set_rx_mode	= macvlan_set_mac_lists,
+	.ndo_get_stats64	= macvlan_dev_get_stats64,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_vlan_rx_add_vid	= macvlan_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	= macvlan_vlan_rx_kill_vid,
+	.ndo_fdb_add		= macvlan_fdb_add,
+	.ndo_fdb_del		= macvlan_fdb_del,
+	.ndo_fdb_dump		= ndo_dflt_fdb_dump,
+	.ndo_get_lock_subclass  = macvlan_get_nest_level,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller	= macvlan_dev_poll_controller,
+	.ndo_netpoll_setup	= macvlan_dev_netpoll_setup,
+	.ndo_netpoll_cleanup	= macvlan_dev_netpoll_cleanup,
+#endif
+	.ndo_get_iflink		= macvlan_dev_get_iflink,
+};
+
+void macvlan_common_setup(struct net_device *dev)
+{
+	ether_setup(dev);
+
+	dev->priv_flags	       &= ~IFF_TX_SKB_SHARING;
+	netif_keep_dst(dev);
+	dev->priv_flags	       |= IFF_UNICAST_FLT;
+	dev->netdev_ops		= &macvlan_netdev_ops;
+	dev->destructor		= free_netdev;
+	dev->header_ops		= &macvlan_hard_header_ops;
+	dev->ethtool_ops	= &macvlan_ethtool_ops;
+}
+EXPORT_SYMBOL_GPL(macvlan_common_setup);
+
+static void macvlan_setup(struct net_device *dev)
+{
+	macvlan_common_setup(dev);
+	dev->tx_queue_len	= 0;
+}
+
+static int macvlan_port_create(struct net_device *dev)
+{
+	struct macvlan_port *port;
+	unsigned int i;
+	int err;
+
+	if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
+		return -EINVAL;
+
+	if (netif_is_ipvlan_port(dev))
+		return -EBUSY;
+
+	port = kzalloc(sizeof(*port), GFP_KERNEL);
+	if (port == NULL)
+		return -ENOMEM;
+
+	port->passthru = false;
+	port->dev = dev;
+	INIT_LIST_HEAD(&port->vlans);
+	for (i = 0; i < MACVLAN_HASH_SIZE; i++)
+		INIT_HLIST_HEAD(&port->vlan_hash[i]);
+	for (i = 0; i < MACVLAN_HASH_SIZE; i++)
+		INIT_HLIST_HEAD(&port->vlan_source_hash[i]);
+
+	skb_queue_head_init(&port->bc_queue);
+	INIT_WORK(&port->bc_work, macvlan_process_broadcast);
+
+	err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
+	if (err)
+		kfree(port);
+	else
+		dev->priv_flags |= IFF_MACVLAN_PORT;
+	return err;
+}
+
+static void macvlan_port_destroy(struct net_device *dev)
+{
+	struct macvlan_port *port = macvlan_port_get_rtnl(dev);
+
+	dev->priv_flags &= ~IFF_MACVLAN_PORT;
+	netdev_rx_handler_unregister(dev);
+
+	/* After this point, no packet can schedule bc_work anymore,
+	 * but we need to cancel it and purge left skbs if any.
+	 */
+	cancel_work_sync(&port->bc_work);
+	__skb_queue_purge(&port->bc_queue);
+
+	kfree_rcu(port, rcu);
+}
+
+static int macvlan_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;
+	}
+
+	if (data && data[IFLA_MACVLAN_FLAGS] &&
+	    nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)
+		return -EINVAL;
+
+	if (data && data[IFLA_MACVLAN_MODE]) {
+		switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
+		case MACVLAN_MODE_PRIVATE:
+		case MACVLAN_MODE_VEPA:
+		case MACVLAN_MODE_BRIDGE:
+		case MACVLAN_MODE_PASSTHRU:
+		case MACVLAN_MODE_SOURCE:
+			break;
+		default:
+			return -EINVAL;
+		}
+	}
+
+	if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
+		switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) {
+		case MACVLAN_MACADDR_ADD:
+		case MACVLAN_MACADDR_DEL:
+		case MACVLAN_MACADDR_FLUSH:
+		case MACVLAN_MACADDR_SET:
+			break;
+		default:
+			return -EINVAL;
+		}
+	}
+
+	if (data && data[IFLA_MACVLAN_MACADDR]) {
+		if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN)
+			return -EINVAL;
+
+		if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR])))
+			return -EADDRNOTAVAIL;
+	}
+
+	if (data && data[IFLA_MACVLAN_MACADDR_COUNT])
+		return -EINVAL;
+
+	return 0;
+}
+
+/**
+ * reconfigure list of remote source mac address
+ * (only for macvlan devices in source mode)
+ * Note regarding alignment: all netlink data is aligned to 4 Byte, which
+ * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
+ */
+static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode,
+				      struct nlattr *data[])
+{
+	char *addr = NULL;
+	int ret, rem, len;
+	struct nlattr *nla, *head;
+	struct macvlan_source_entry *entry;
+
+	if (data[IFLA_MACVLAN_MACADDR])
+		addr = nla_data(data[IFLA_MACVLAN_MACADDR]);
+
+	if (mode == MACVLAN_MACADDR_ADD) {
+		if (!addr)
+			return -EINVAL;
+
+		return macvlan_hash_add_source(vlan, addr);
+
+	} else if (mode == MACVLAN_MACADDR_DEL) {
+		if (!addr)
+			return -EINVAL;
+
+		entry = macvlan_hash_lookup_source(vlan, addr);
+		if (entry) {
+			macvlan_hash_del_source(entry);
+			vlan->macaddr_count--;
+		}
+	} else if (mode == MACVLAN_MACADDR_FLUSH) {
+		macvlan_flush_sources(vlan->port, vlan);
+	} else if (mode == MACVLAN_MACADDR_SET) {
+		macvlan_flush_sources(vlan->port, vlan);
+
+		if (addr) {
+			ret = macvlan_hash_add_source(vlan, addr);
+			if (ret)
+				return ret;
+		}
+
+		if (!data || !data[IFLA_MACVLAN_MACADDR_DATA])
+			return 0;
+
+		head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]);
+		len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]);
+
+		nla_for_each_attr(nla, head, len, rem) {
+			if (nla_type(nla) != IFLA_MACVLAN_MACADDR ||
+			    nla_len(nla) != ETH_ALEN)
+				continue;
+
+			addr = nla_data(nla);
+			ret = macvlan_hash_add_source(vlan, addr);
+			if (ret)
+				return ret;
+		}
+	} else {
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
+			   struct nlattr *tb[], struct nlattr *data[])
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	struct macvlan_port *port;
+	struct net_device *lowerdev;
+	int err;
+	int macmode;
+
+	if (!tb[IFLA_LINK])
+		return -EINVAL;
+
+	lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
+	if (lowerdev == NULL)
+		return -ENODEV;
+
+	/* When creating macvlans or macvtaps on top of other macvlans - use
+	 * the real device as the lowerdev.
+	 */
+	if (netif_is_macvlan(lowerdev))
+		lowerdev = macvlan_dev_real_dev(lowerdev);
+
+	if (!tb[IFLA_MTU])
+		dev->mtu = lowerdev->mtu;
+	else if (dev->mtu > lowerdev->mtu)
+		return -EINVAL;
+
+	if (!tb[IFLA_ADDRESS])
+		eth_hw_addr_random(dev);
+
+	if (!macvlan_port_exists(lowerdev)) {
+		err = macvlan_port_create(lowerdev);
+		if (err < 0)
+			return err;
+	}
+	port = macvlan_port_get_rtnl(lowerdev);
+
+	/* Only 1 macvlan device can be created in passthru mode */
+	if (port->passthru)
+		return -EINVAL;
+
+	vlan->lowerdev = lowerdev;
+	vlan->dev      = dev;
+	vlan->port     = port;
+	vlan->set_features = MACVLAN_FEATURES;
+	vlan->nest_level = dev_get_nest_level(lowerdev, netif_is_macvlan) + 1;
+
+	vlan->mode     = MACVLAN_MODE_VEPA;
+	if (data && data[IFLA_MACVLAN_MODE])
+		vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
+
+	if (data && data[IFLA_MACVLAN_FLAGS])
+		vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
+
+	if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
+		if (port->count)
+			return -EINVAL;
+		port->passthru = true;
+		eth_hw_addr_inherit(dev, lowerdev);
+	}
+
+	if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
+		if (vlan->mode != MACVLAN_MODE_SOURCE)
+			return -EINVAL;
+		macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
+		err = macvlan_changelink_sources(vlan, macmode, data);
+		if (err)
+			return err;
+	}
+
+	port->count += 1;
+	err = register_netdevice(dev);
+	if (err < 0)
+		goto destroy_port;
+
+	dev->priv_flags |= IFF_MACVLAN;
+	err = netdev_upper_dev_link(lowerdev, dev);
+	if (err)
+		goto unregister_netdev;
+
+	list_add_tail_rcu(&vlan->list, &port->vlans);
+	netif_stacked_transfer_operstate(lowerdev, dev);
+
+	return 0;
+
+unregister_netdev:
+	unregister_netdevice(dev);
+destroy_port:
+	port->count -= 1;
+	if (!port->count)
+		macvlan_port_destroy(lowerdev);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(macvlan_common_newlink);
+
+static int macvlan_newlink(struct net *src_net, struct net_device *dev,
+			   struct nlattr *tb[], struct nlattr *data[])
+{
+	return macvlan_common_newlink(src_net, dev, tb, data);
+}
+
+void macvlan_dellink(struct net_device *dev, struct list_head *head)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+
+	if (vlan->mode == MACVLAN_MODE_SOURCE)
+		macvlan_flush_sources(vlan->port, vlan);
+	list_del_rcu(&vlan->list);
+	unregister_netdevice_queue(dev, head);
+	netdev_upper_dev_unlink(vlan->lowerdev, dev);
+}
+EXPORT_SYMBOL_GPL(macvlan_dellink);
+
+static int macvlan_changelink(struct net_device *dev,
+		struct nlattr *tb[], struct nlattr *data[])
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	enum macvlan_mode mode;
+	bool set_mode = false;
+	enum macvlan_macaddr_mode macmode;
+	int ret;
+
+	/* Validate mode, but don't set yet: setting flags may fail. */
+	if (data && data[IFLA_MACVLAN_MODE]) {
+		set_mode = true;
+		mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
+		/* Passthrough mode can't be set or cleared dynamically */
+		if ((mode == MACVLAN_MODE_PASSTHRU) !=
+		    (vlan->mode == MACVLAN_MODE_PASSTHRU))
+			return -EINVAL;
+		if (vlan->mode == MACVLAN_MODE_SOURCE &&
+		    vlan->mode != mode)
+			macvlan_flush_sources(vlan->port, vlan);
+	}
+
+	if (data && data[IFLA_MACVLAN_FLAGS]) {
+		__u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
+		bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
+		if (vlan->port->passthru && promisc) {
+			int err;
+
+			if (flags & MACVLAN_FLAG_NOPROMISC)
+				err = dev_set_promiscuity(vlan->lowerdev, -1);
+			else
+				err = dev_set_promiscuity(vlan->lowerdev, 1);
+			if (err < 0)
+				return err;
+		}
+		vlan->flags = flags;
+	}
+	if (set_mode)
+		vlan->mode = mode;
+	if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
+		if (vlan->mode != MACVLAN_MODE_SOURCE)
+			return -EINVAL;
+		macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
+		ret = macvlan_changelink_sources(vlan, macmode, data);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan)
+{
+	if (vlan->macaddr_count == 0)
+		return 0;
+	return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
+		+ vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN);
+}
+
+static size_t macvlan_get_size(const struct net_device *dev)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+
+	return (0
+		+ nla_total_size(4) /* IFLA_MACVLAN_MODE */
+		+ nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
+		+ nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
+		+ macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */
+		);
+}
+
+static int macvlan_fill_info_macaddr(struct sk_buff *skb,
+				     const struct macvlan_dev *vlan,
+				     const int i)
+{
+	struct hlist_head *h = &vlan->port->vlan_source_hash[i];
+	struct macvlan_source_entry *entry;
+
+	hlist_for_each_entry_rcu(entry, h, hlist) {
+		if (entry->vlan != vlan)
+			continue;
+		if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr))
+			return 1;
+	}
+	return 0;
+}
+
+static int macvlan_fill_info(struct sk_buff *skb,
+				const struct net_device *dev)
+{
+	struct macvlan_dev *vlan = netdev_priv(dev);
+	int i;
+	struct nlattr *nest;
+
+	if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
+		goto nla_put_failure;
+	if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
+		goto nla_put_failure;
+	if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count))
+		goto nla_put_failure;
+	if (vlan->macaddr_count > 0) {
+		nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA);
+		if (nest == NULL)
+			goto nla_put_failure;
+
+		for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
+			if (macvlan_fill_info_macaddr(skb, vlan, i))
+				goto nla_put_failure;
+		}
+		nla_nest_end(skb, nest);
+	}
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
+static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
+	[IFLA_MACVLAN_MODE]  = { .type = NLA_U32 },
+	[IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
+	[IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 },
+	[IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
+	[IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED },
+	[IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 },
+};
+
+int macvlan_link_register(struct rtnl_link_ops *ops)
+{
+	/* common fields */
+	ops->priv_size		= sizeof(struct macvlan_dev);
+	ops->validate		= macvlan_validate;
+	ops->maxtype		= IFLA_MACVLAN_MAX;
+	ops->policy		= macvlan_policy;
+	ops->changelink		= macvlan_changelink;
+	ops->get_size		= macvlan_get_size;
+	ops->fill_info		= macvlan_fill_info;
+
+	return rtnl_link_register(ops);
+};
+EXPORT_SYMBOL_GPL(macvlan_link_register);
+
+static struct net *macvlan_get_link_net(const struct net_device *dev)
+{
+	return dev_net(macvlan_dev_real_dev(dev));
+}
+
+static struct rtnl_link_ops macvlan_link_ops = {
+	.kind		= "macvlan",
+	.setup		= macvlan_setup,
+	.newlink	= macvlan_newlink,
+	.dellink	= macvlan_dellink,
+	.get_link_net	= macvlan_get_link_net,
+};
+
+static int macvlan_device_event(struct notifier_block *unused,
+				unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+	struct macvlan_dev *vlan, *next;
+	struct macvlan_port *port;
+	LIST_HEAD(list_kill);
+
+	if (!macvlan_port_exists(dev))
+		return NOTIFY_DONE;
+
+	port = macvlan_port_get_rtnl(dev);
+
+	switch (event) {
+	case NETDEV_CHANGE:
+		list_for_each_entry(vlan, &port->vlans, list)
+			netif_stacked_transfer_operstate(vlan->lowerdev,
+							 vlan->dev);
+		break;
+	case NETDEV_FEAT_CHANGE:
+		list_for_each_entry(vlan, &port->vlans, list) {
+			vlan->dev->gso_max_size = dev->gso_max_size;
+			netdev_update_features(vlan->dev);
+		}
+		break;
+	case NETDEV_CHANGEMTU:
+		list_for_each_entry(vlan, &port->vlans, list) {
+			if (vlan->dev->mtu <= dev->mtu)
+				continue;
+			dev_set_mtu(vlan->dev, dev->mtu);
+		}
+		break;
+	case NETDEV_CHANGEADDR:
+		if (!port->passthru)
+			return NOTIFY_DONE;
+
+		vlan = list_first_entry_or_null(&port->vlans,
+						struct macvlan_dev,
+						list);
+
+		if (macvlan_sync_address(vlan->dev, dev->dev_addr))
+			return NOTIFY_BAD;
+
+		break;
+	case NETDEV_UNREGISTER:
+		/* twiddle thumbs on netns device moves */
+		if (dev->reg_state != NETREG_UNREGISTERING)
+			break;
+
+		list_for_each_entry_safe(vlan, next, &port->vlans, list)
+			vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
+		unregister_netdevice_many(&list_kill);
+		break;
+	case NETDEV_PRE_TYPE_CHANGE:
+		/* Forbid underlaying device to change its type. */
+		return NOTIFY_BAD;
+
+	case NETDEV_NOTIFY_PEERS:
+	case NETDEV_BONDING_FAILOVER:
+	case NETDEV_RESEND_IGMP:
+		/* Propagate to all vlans */
+		list_for_each_entry(vlan, &port->vlans, list)
+			call_netdevice_notifiers(event, vlan->dev);
+	}
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block macvlan_notifier_block __read_mostly = {
+	.notifier_call	= macvlan_device_event,
+};
+
+static int __init macvlan_init_module(void)
+{
+	int err;
+
+	register_netdevice_notifier(&macvlan_notifier_block);
+
+	err = macvlan_link_register(&macvlan_link_ops);
+	if (err < 0)
+		goto err1;
+	return 0;
+err1:
+	unregister_netdevice_notifier(&macvlan_notifier_block);
+	return err;
+}
+
+static void __exit macvlan_cleanup_module(void)
+{
+	rtnl_link_unregister(&macvlan_link_ops);
+	unregister_netdevice_notifier(&macvlan_notifier_block);
+}
+
+module_init(macvlan_init_module);
+module_exit(macvlan_cleanup_module);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_DESCRIPTION("Driver for MAC address based VLANs");
+MODULE_ALIAS_RTNL_LINK("macvlan");