1 files changed, 35 insertions, 6 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 85f99f60deea..50a4719512ed 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -320,6 +320,9 @@ struct net_device
 #define NETIF_F_TSO_ECN         (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
 #define NETIF_F_TSO6            (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
 
+        /* List of features with software fallbacks. */
+#define NETIF_F_GSO_SOFTWARE    (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
+
 #define NETIF_F_GEN_CSUM        (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
 #define NETIF_F_ALL_CSUM        (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
 
@@ -549,6 +552,7 @@ struct packet_type {
                                          struct net_device *);
         struct sk_buff          *(*gso_segment)(struct sk_buff *skb,
                                                 int features);
+        int                     (*gso_send_check)(struct sk_buff *skb);
         void                    *af_packet_priv;
         struct list_head        list;
 };
@@ -923,10 +927,10 @@ static inline void netif_tx_lock_bh(struct net_device *dev)
 
 static inline int netif_tx_trylock(struct net_device *dev)
 {
-        int err = spin_trylock(&dev->_xmit_lock);
-        if (!err)
+        int ok = spin_trylock(&dev->_xmit_lock);
+        if (likely(ok))
                 dev->xmit_lock_owner = smp_processor_id();
-        return err;
+        return ok;
 }
 
 static inline void netif_tx_unlock(struct net_device *dev)
@@ -1001,13 +1005,38 @@ static inline int net_gso_ok(int features, int gso_type)
 
 static inline int skb_gso_ok(struct sk_buff *skb, int features)
 {
-        return net_gso_ok(features, skb_shinfo(skb)->gso_size ?
-                                    skb_shinfo(skb)->gso_type : 0);
+        return net_gso_ok(features, skb_shinfo(skb)->gso_type);
 }
 
 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
 {
-        return !skb_gso_ok(skb, dev->features);
+        return skb_is_gso(skb) &&
+               (!skb_gso_ok(skb, dev->features) ||
+                unlikely(skb->ip_summed != CHECKSUM_HW));
+}
+
+/* On bonding slaves other than the currently active slave, suppress
+ * duplicates except for 802.3ad ETH_P_SLOW and alb non-mcast/bcast.
+ */
+static inline int skb_bond_should_drop(struct sk_buff *skb)
+{
+        struct net_device *dev = skb->dev;
+        struct net_device *master = dev->master;
+
+        if (master &&
+            (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
+                if (master->priv_flags & IFF_MASTER_ALB) {
+                        if (skb->pkt_type != PACKET_BROADCAST &&
+                            skb->pkt_type != PACKET_MULTICAST)
+                                return 0;
+                }
+                if (master->priv_flags & IFF_MASTER_8023AD &&
+                    skb->protocol == __constant_htons(ETH_P_SLOW))
+                        return 0;
+
+                return 1;
+        }
+        return 0;
 }
 
 #endif /* __KERNEL__ */