net: Add layer 2 hardware acceleration operations for macvlan devices
Add a operations structure that allows a network interface to export
the fact that it supports package forwarding in hardware between
physical interfaces and other mac layer devices assigned to it (such
as macvlans). This operaions structure can be used by virtual mac
devices to bypass software switching so that forwarding can be done
in hardware more efficiently.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index cc9845e..af4aaa5 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -297,7 +297,13 @@
int ret;
const struct macvlan_dev *vlan = netdev_priv(dev);
- ret = macvlan_queue_xmit(skb, dev);
+ if (vlan->fwd_priv) {
+ skb->dev = vlan->lowerdev;
+ ret = dev_hard_start_xmit(skb, skb->dev, NULL, vlan->fwd_priv);
+ } else {
+ ret = macvlan_queue_xmit(skb, dev);
+ }
+
if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
struct macvlan_pcpu_stats *pcpu_stats;
@@ -347,6 +353,21 @@
goto hash_add;
}
+ if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) {
+ vlan->fwd_priv =
+ lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);
+
+ /* If we get a NULL pointer back, or if we get an error
+ * then we should just fall through to the non accelerated path
+ */
+ if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
+ vlan->fwd_priv = NULL;
+ } else {
+ dev->features &= ~NETIF_F_LLTX;
+ return 0;
+ }
+ }
+
err = -EBUSY;
if (macvlan_addr_busy(vlan->port, dev->dev_addr))
goto out;
@@ -367,6 +388,11 @@
del_unicast:
dev_uc_del(lowerdev, dev->dev_addr);
out:
+ if (vlan->fwd_priv) {
+ lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
+ vlan->fwd_priv);
+ vlan->fwd_priv = NULL;
+ }
return err;
}
@@ -375,6 +401,13 @@
struct macvlan_dev *vlan = netdev_priv(dev);
struct net_device *lowerdev = vlan->lowerdev;
+ if (vlan->fwd_priv) {
+ lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
+ vlan->fwd_priv);
+ vlan->fwd_priv = NULL;
+ return 0;
+ }
+
dev_uc_unsync(lowerdev, dev);
dev_mc_unsync(lowerdev, dev);
@@ -833,6 +866,7 @@
if (err < 0)
goto destroy_port;
+ dev->priv_flags |= IFF_MACVLAN;
err = netdev_upper_dev_link(lowerdev, dev);
if (err)
goto destroy_port;