xen-netback: make sure that hashes are not send to unaware frontends

[cascardo/linux.git] / drivers / net / xen-netback / interface.c

diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index fb50c6d..74dc2bf 100644 (file)
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -149,17 +149,8 @@ static u16 xenvif_select_queue(struct net_device *dev, struct sk_buff *skb,
        struct xenvif *vif = netdev_priv(dev);
        unsigned int size = vif->hash.size;
 
-       if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE) {
-               u16 index = fallback(dev, skb) % dev->real_num_tx_queues;
-
-               /* Make sure there is no hash information in the socket
-                * buffer otherwise it would be incorrectly forwarded
-                * to the frontend.
-                */
-               skb_clear_hash(skb);
-
-               return index;
-       }
+       if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE)
+               return fallback(dev, skb) % dev->real_num_tx_queues;
 
        xenvif_set_skb_hash(vif, skb);
 
@@ -208,6 +199,13 @@ static int xenvif_start_xmit(struct sk_buff *skb, struct net_device *dev)
        cb = XENVIF_RX_CB(skb);
        cb->expires = jiffies + vif->drain_timeout;
 
+       /* If there is no hash algorithm configured then make sure there
+        * is no hash information in the socket buffer otherwise it
+        * would be incorrectly forwarded to the frontend.
+        */
+       if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE)
+               skb_clear_hash(skb);
+
        xenvif_rx_queue_tail(queue, skb);
        xenvif_kick_thread(queue);
 
@@ -319,9 +317,9 @@ static netdev_features_t xenvif_fix_features(struct net_device *dev,
 
        if (!vif->can_sg)
                features &= ~NETIF_F_SG;
-       if (~(vif->gso_mask | vif->gso_prefix_mask) & GSO_BIT(TCPV4))
+       if (~(vif->gso_mask) & GSO_BIT(TCPV4))
                features &= ~NETIF_F_TSO;
-       if (~(vif->gso_mask | vif->gso_prefix_mask) & GSO_BIT(TCPV6))
+       if (~(vif->gso_mask) & GSO_BIT(TCPV6))
                features &= ~NETIF_F_TSO6;
        if (!vif->ip_csum)
                features &= ~NETIF_F_IP_CSUM;
@@ -467,7 +465,7 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
        dev->netdev_ops = &xenvif_netdev_ops;
        dev->hw_features = NETIF_F_SG |
                NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
-               NETIF_F_TSO | NETIF_F_TSO6;
+               NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_FRAGLIST;
        dev->features = dev->hw_features | NETIF_F_RXCSUM;
        dev->ethtool_ops = &xenvif_ethtool_ops;