bonding: Advertize vxlan offload features when supported

When the underlying device supports TCP offloads for VXLAN/UDP
encapulated traffic, we need to reflect that through the hw_enc_features
field of the bonding net-device. This will cause the xmit path
in the core networking stack to provide bonding with encapsulated
GSO frames to offload into the HW etc.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 04f35f9..3a451b6 100644 (file)
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1025,10 +1025,14 @@ static netdev_features_t bond_fix_features(struct net_device *dev,
                                 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
                                 NETIF_F_HIGHDMA | NETIF_F_LRO)
 
+#define BOND_ENC_FEATURES      (NETIF_F_ALL_CSUM | NETIF_F_SG | NETIF_F_RXCSUM |\
+                                NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL)
+
 static void bond_compute_features(struct bonding *bond)
 {
        unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
        netdev_features_t vlan_features = BOND_VLAN_FEATURES;
+       netdev_features_t enc_features  = BOND_ENC_FEATURES;
        struct net_device *bond_dev = bond->dev;
        struct list_head *iter;
        struct slave *slave;
@@ -1044,6 +1048,9 @@ static void bond_compute_features(struct bonding *bond)
                vlan_features = netdev_increment_features(vlan_features,
                        slave->dev->vlan_features, BOND_VLAN_FEATURES);
 
+               enc_features = netdev_increment_features(enc_features,
+                                                        slave->dev->hw_enc_features,
+                                                        BOND_ENC_FEATURES);
                dst_release_flag &= slave->dev->priv_flags;
                if (slave->dev->hard_header_len > max_hard_header_len)
                        max_hard_header_len = slave->dev->hard_header_len;
@@ -1054,6 +1061,7 @@ static void bond_compute_features(struct bonding *bond)
 
 done:
        bond_dev->vlan_features = vlan_features;
+       bond_dev->hw_enc_features = enc_features;
        bond_dev->hard_header_len = max_hard_header_len;
        bond_dev->gso_max_segs = gso_max_segs;
        netif_set_gso_max_size(bond_dev, gso_max_size);
@@ -3975,6 +3983,7 @@ void bond_setup(struct net_device *bond_dev)
                                NETIF_F_HW_VLAN_CTAG_FILTER;
 
        bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
+       bond_dev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
        bond_dev->features |= bond_dev->hw_features;
 }