3 files changed, 26 insertions, 4 deletions

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 87e8d4cb4057..f15fe2cf72ae 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -499,7 +499,7 @@ static const struct net_device_ops macvlan_netdev_ops = {
         .ndo_validate_addr      = eth_validate_addr,
 };
 
-static void macvlan_setup(struct net_device *dev)
+void macvlan_common_setup(struct net_device *dev)
 {
         ether_setup(dev);
 
@@ -508,6 +508,12 @@ static void macvlan_setup(struct net_device *dev)
         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;
 }
 
@@ -705,7 +711,6 @@ int macvlan_link_register(struct rtnl_link_ops *ops)
         /* common fields */
         ops->priv_size          = sizeof(struct macvlan_dev);
         ops->get_tx_queues      = macvlan_get_tx_queues;
-        ops->setup              = macvlan_setup;
         ops->validate           = macvlan_validate;
         ops->maxtype            = IFLA_MACVLAN_MAX;
         ops->policy             = macvlan_policy;
@@ -719,6 +724,7 @@ EXPORT_SYMBOL_GPL(macvlan_link_register);
 
 static struct rtnl_link_ops macvlan_link_ops = {
         .kind           = "macvlan",
+        .setup          = macvlan_setup,
         .newlink        = macvlan_newlink,
         .dellink        = macvlan_dellink,
 };
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index a8a94e2f6ddc..ff02b836c3c4 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -180,11 +180,18 @@ static int macvtap_forward(struct net_device *dev, struct sk_buff *skb)
 {
         struct macvtap_queue *q = macvtap_get_queue(dev, skb);
         if (!q)
-                return -ENOLINK;
+                goto drop;
+
+        if (skb_queue_len(&q->sk.sk_receive_queue) >= dev->tx_queue_len)
+                goto drop;
 
         skb_queue_tail(&q->sk.sk_receive_queue, skb);
         wake_up_interruptible_poll(sk_sleep(&q->sk), POLLIN | POLLRDNORM | POLLRDBAND);
-        return 0;
+        return NET_RX_SUCCESS;
+
+drop:
+        kfree_skb(skb);
+        return NET_RX_DROP;
 }
 
 /*
@@ -235,8 +242,15 @@ static void macvtap_dellink(struct net_device *dev,
         macvlan_dellink(dev, head);
 }
 
+static void macvtap_setup(struct net_device *dev)
+{
+        macvlan_common_setup(dev);
+        dev->tx_queue_len = TUN_READQ_SIZE;
+}
+
 static struct rtnl_link_ops macvtap_link_ops __read_mostly = {
         .kind           = "macvtap",
+        .setup          = macvtap_setup,
         .newlink        = macvtap_newlink,
         .dellink        = macvtap_dellink,
 };
diff --git a/include/linux/if_macvlan.h b/include/linux/if_macvlan.h
index 9ea047aca795..1ffaeffeff74 100644
--- a/include/linux/if_macvlan.h
+++ b/include/linux/if_macvlan.h
@@ -67,6 +67,8 @@ static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
         }
 }
 
+extern void macvlan_common_setup(struct net_device *dev);
+
 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
                                   struct nlattr *tb[], struct nlattr *data[],
                                   int (*receive)(struct sk_buff *skb),