vlan: Set hard_header_len according to available acceleration

[ Upstream commit fc0d48b8fb449ca007b2057328abf736cb516168 ]

Currently, if the card supports CTAG acceleration we do not
account for the vlan header even if we are configuring an
8021AD vlan.  This may not be best since we'll do software
tagging for 8021AD which will cause data copy on skb head expansion
Configure the length based on available hw offload capabilities and
vlan protocol.

CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index b3d17d1c49c3fbecdd5701da18c14c9767f7d969..9a87f5aecd1f2da814521d64c1ff5eebce5a664c 100644 (file)
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -307,9 +307,11 @@ static void vlan_sync_address(struct net_device *dev,
 static void vlan_transfer_features(struct net_device *dev,
                                   struct net_device *vlandev)
 {
+       struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
+
        vlandev->gso_max_size = dev->gso_max_size;
 
-       if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
+       if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
                vlandev->hard_header_len = dev->hard_header_len;
        else
                vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index d745ff5b63cc64e17dc1bd48f171bcd87665ea9a..b1c42410fe30f356793d89ad4378f900d3cd2f9f 100644 (file)
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -592,7 +592,8 @@ static int vlan_dev_init(struct net_device *dev)
 #endif
 
        dev->needed_headroom = real_dev->needed_headroom;
-       if (real_dev->features & NETIF_F_HW_VLAN_CTAG_TX) {
+       if (vlan_hw_offload_capable(real_dev->features,
+                                   vlan_dev_priv(dev)->vlan_proto)) {
                dev->header_ops      = &vlan_passthru_header_ops;
                dev->hard_header_len = real_dev->hard_header_len;
        } else {