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

Pull networking updates from David Miller:

 1) Seccomp BPF filters can now be JIT'd, from Alexei Starovoitov.

 2) Multiqueue support in xen-netback and xen-netfront, from Andrew J
    Benniston.

 3) Allow tweaking of aggregation settings in cdc_ncm driver, from Bjørn
    Mork.

 4) BPF now has a "random" opcode, from Chema Gonzalez.

 5) Add more BPF documentation and improve test framework, from Daniel
    Borkmann.

 6) Support TCP fastopen over ipv6, from Daniel Lee.

 7) Add software TSO helper functions and use them to support software
    TSO in mvneta and mv643xx_eth drivers.  From Ezequiel Garcia.

 8) Support software TSO in fec driver too, from Nimrod Andy.

 9) Add Broadcom SYSTEMPORT driver, from Florian Fainelli.

10) Handle broadcasts more gracefully over macvlan when there are large
    numbers of interfaces configured, from Herbert Xu.

11) Allow more control over fwmark used for non-socket based responses,
    from Lorenzo Colitti.

12) Do TCP congestion window limiting based upon measurements, from Neal
    Cardwell.

13) Support busy polling in SCTP, from Neal Horman.

14) Allow RSS key to be configured via ethtool, from Venkata Duvvuru.

15) Bridge promisc mode handling improvements from Vlad Yasevich.

16) Don't use inetpeer entries to implement ID generation any more, it
    performs poorly, from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1522 commits)
  rtnetlink: fix userspace API breakage for iproute2 < v3.9.0
  tcp: fixing TLP's FIN recovery
  net: fec: Add software TSO support
  net: fec: Add Scatter/gather support
  net: fec: Increase buffer descriptor entry number
  net: fec: Factorize feature setting
  net: fec: Enable IP header hardware checksum
  net: fec: Factorize the .xmit transmit function
  bridge: fix compile error when compiling without IPv6 support
  bridge: fix smatch warning / potential null pointer dereference
  via-rhine: fix full-duplex with autoneg disable
  bnx2x: Enlarge the dorq threshold for VFs
  bnx2x: Check for UNDI in uncommon branch
  bnx2x: Fix 1G-baseT link
  bnx2x: Fix link for KR with swapped polarity lane
  sctp: Fix sk_ack_backlog wrap-around problem
  net/core: Add VF link state control policy
  net/fsl: xgmac_mdio is dependent on OF_MDIO
  net/fsl: Make xgmac_mdio read error message useful
  net_sched: drr: warn when qdisc is not work conserving
  ...

1 files changed, 218 insertions, 44 deletions

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index d53e299..958df38 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -30,8 +30,10 @@
 #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_SIZE	(1 << BITS_PER_BYTE)
 
@@ -40,10 +42,19 @@ struct macvlan_port {
 	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;
 };
 
+#define MACVLAN_PORT_IS_EMPTY(port)    list_empty(&port->vlans)
+
+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);
 
 static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
@@ -120,7 +131,7 @@ static int macvlan_broadcast_one(struct sk_buff *skb,
 	struct net_device *dev = vlan->dev;
 
 	if (local)
-		return dev_forward_skb(dev, skb);
+		return __dev_forward_skb(dev, skb);
 
 	skb->dev = dev;
 	if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
@@ -128,7 +139,7 @@ static int macvlan_broadcast_one(struct sk_buff *skb,
 	else
 		skb->pkt_type = PACKET_MULTICAST;
 
-	return netif_rx(skb);
+	return 0;
 }
 
 static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
@@ -175,32 +186,32 @@ static void macvlan_broadcast(struct sk_buff *skb,
 			if (likely(nskb))
 				err = macvlan_broadcast_one(
 					nskb, vlan, eth,
-					mode == MACVLAN_MODE_BRIDGE);
+					mode == MACVLAN_MODE_BRIDGE) ?:
+				      netif_rx_ni(nskb);
 			macvlan_count_rx(vlan, skb->len + ETH_HLEN,
 					 err == NET_RX_SUCCESS, 1);
 		}
 	}
 }
 
-/* called under rcu_read_lock() from netif_receive_skb */
-static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
+static void macvlan_process_broadcast(struct work_struct *w)
 {
-	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 = NET_RX_DROP;
+	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();
 
-	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);
-		src = macvlan_hash_lookup(port, eth->h_source);
 		if (!src)
 			/* frame comes from an external address */
 			macvlan_broadcast(skb, port, NULL,
@@ -213,20 +224,80 @@ static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
 			macvlan_broadcast(skb, port, src->dev,
 					  MACVLAN_MODE_VEPA |
 					  MACVLAN_MODE_BRIDGE);
-		else if (src->mode == 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);
-		else {
+
+		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) < skb->dev->tx_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);
+}
+
+/* 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 = NET_RX_DROP;
+
+	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);
+		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);
+			ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?:
+			      netif_rx(skb);
 			goto out;
 		}
 
+		MACVLAN_SKB_CB(skb)->src = src;
+		macvlan_broadcast_enqueue(port, skb);
+
 		return RX_HANDLER_PASS;
 	}
 
@@ -287,12 +358,26 @@ xmit_world:
 	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;
-	const struct macvlan_dev *vlan = netdev_priv(dev);
+	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;
@@ -424,35 +509,49 @@ hash_del:
 	return 0;
 }
 
-static int macvlan_set_mac_address(struct net_device *dev, void *p)
+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;
-	struct sockaddr *addr = p;
 	int err;
 
-	if (!is_valid_ether_addr(addr->sa_data))
-		return -EADDRNOTAVAIL;
-
 	if (!(dev->flags & IFF_UP)) {
 		/* Just copy in the new address */
-		memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+		ether_addr_copy(dev->dev_addr, addr);
 	} else {
 		/* Rehash and update the device filters */
-		if (macvlan_addr_busy(vlan->port, addr->sa_data))
+		if (macvlan_addr_busy(vlan->port, addr))
 			return -EBUSY;
 
-		err = dev_uc_add(lowerdev, addr->sa_data);
-		if (err)
-			return err;
+		if (!vlan->port->passthru) {
+			err = dev_uc_add(lowerdev, addr);
+			if (err)
+				return err;
 
-		dev_uc_del(lowerdev, dev->dev_addr);
+			dev_uc_del(lowerdev, dev->dev_addr);
+		}
 
-		macvlan_hash_change_addr(vlan, addr->sa_data);
+		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);
@@ -567,8 +666,7 @@ static void macvlan_uninit(struct net_device *dev)
 
 	free_percpu(vlan->pcpu_stats);
 
-	port->count -= 1;
-	if (!port->count)
+	if (MACVLAN_PORT_IS_EMPTY(port))
 		macvlan_port_destroy(port->dev);
 }
 
@@ -705,6 +803,50 @@ static netdev_features_t macvlan_fix_features(struct net_device *dev,
 	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 const struct ethtool_ops macvlan_ethtool_ops = {
 	.get_link		= ethtool_op_get_link,
 	.get_settings		= macvlan_ethtool_get_settings,
@@ -730,6 +872,11 @@ static const struct net_device_ops macvlan_netdev_ops = {
 	.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
 };
 
 void macvlan_common_setup(struct net_device *dev)
@@ -770,6 +917,9 @@ static int macvlan_port_create(struct net_device *dev)
 	for (i = 0; i < MACVLAN_HASH_SIZE; i++)
 		INIT_HLIST_HEAD(&port->vlan_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);
@@ -782,6 +932,7 @@ static void macvlan_port_destroy(struct net_device *dev)
 {
 	struct macvlan_port *port = macvlan_port_get_rtnl(dev);
 
+	cancel_work_sync(&port->bc_work);
 	dev->priv_flags &= ~IFF_MACVLAN_PORT;
 	netdev_rx_handler_unregister(dev);
 	kfree_rcu(port, rcu);
@@ -868,13 +1019,12 @@ int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
 		vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
 
 	if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
-		if (port->count)
+		if (!MACVLAN_PORT_IS_EMPTY(port))
 			return -EINVAL;
 		port->passthru = true;
 		eth_hw_addr_inherit(dev, lowerdev);
 	}
 
-	port->count += 1;
 	err = register_netdevice(dev);
 	if (err < 0)
 		goto destroy_port;
@@ -892,8 +1042,7 @@ int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
 unregister_netdev:
 	unregister_netdevice(dev);
 destroy_port:
-	port->count -= 1;
-	if (!port->count)
+	if (MACVLAN_PORT_IS_EMPTY(port))
 		macvlan_port_destroy(lowerdev);
 
 	return err;
@@ -1028,6 +1177,25 @@ static int macvlan_device_event(struct notifier_block *unused,
 			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)
@@ -1036,11 +1204,17 @@ static int macvlan_device_event(struct notifier_block *unused,
 		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);
-		list_del(&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;
 }