[VLAN]: Make sure bonding packet drop checks get done in hwaccel RX path.

Since __vlan_hwaccel_rx() is essentially bypassing the
netif_receive_skb() call that would have occurred if we did the VLAN
decapsulation in software, we are missing the skb_bond() call and the
assosciated checks it does.

Export those checks via an inline function, skb_bond_should_drop(),
and use this in __vlan_hwaccel_rx().

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 383627a..ab27408 100644 (file)
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -155,6 +155,11 @@ static inline int __vlan_hwaccel_rx(struct sk_buff *skb,
 {
        struct net_device_stats *stats;
 
+       if (skb_bond_should_drop(skb)) {
+               dev_kfree_skb_any(skb);
+               return NET_RX_DROP;
+       }
+
        skb->dev = grp->vlan_devices[vlan_tag & VLAN_VID_MASK];
        if (skb->dev == NULL) {
                dev_kfree_skb_any(skb);

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 75f02d8..c0c2b46 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1012,6 +1012,30 @@ static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
                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__ */
 
 #endif /* _LINUX_DEV_H */

diff --git a/net/core/dev.c b/net/core/dev.c
index d95e262..9fe96cd 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1619,26 +1619,10 @@ static inline struct net_device *skb_bond(struct sk_buff *skb)
        struct net_device *dev = skb->dev;
 
        if (dev->master) {
-               /*
-                * On bonding slaves other than the currently active
-                * slave, suppress duplicates except for 802.3ad
-                * ETH_P_SLOW and alb non-mcast/bcast.
-                */
-               if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
-                       if (dev->master->priv_flags & IFF_MASTER_ALB) {
-                               if (skb->pkt_type != PACKET_BROADCAST &&
-                                   skb->pkt_type != PACKET_MULTICAST)
-                                       goto keep;
-                       }
-
-                       if (dev->master->priv_flags & IFF_MASTER_8023AD &&
-                           skb->protocol == __constant_htons(ETH_P_SLOW))
-                               goto keep;
-               
+               if (skb_bond_should_drop(skb)) {
                        kfree_skb(skb);
                        return NULL;
                }
-keep:
                skb->dev = dev->master;
        }