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authorPaolo Abeni <pabeni@redhat.com>2016-02-26 10:45:39 +0100
committerDavid S. Miller <davem@davemloft.net>2016-03-01 15:54:30 -0500
commit3a927bc7cf9d0fbe8f4a8189dd5f8440228f64e7 (patch)
tree31a903a08d2f40e2c2026ef955be2d86bdecf777 /net/openvswitch/vport-internal_dev.c
parent45493d47c3db862263583400c1f721f13f2a0610 (diff)
ovs: propagate per dp max headroom to all vports
This patch implements bookkeeping support to compute the maximum headroom for all the devices in each datapath. When said value changes, the underlying devs are notified via the ndo_set_rx_headroom method. This also increases the internal vports xmit performance. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch/vport-internal_dev.c')
-rw-r--r--net/openvswitch/vport-internal_dev.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c
index ec76398a792f..83a5534abd31 100644
--- a/net/openvswitch/vport-internal_dev.c
+++ b/net/openvswitch/vport-internal_dev.c
@@ -138,6 +138,11 @@ internal_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
return stats;
}
+void internal_set_rx_headroom(struct net_device *dev, int new_hr)
+{
+ dev->needed_headroom = new_hr;
+}
+
static const struct net_device_ops internal_dev_netdev_ops = {
.ndo_open = internal_dev_open,
.ndo_stop = internal_dev_stop,
@@ -145,6 +150,7 @@ static const struct net_device_ops internal_dev_netdev_ops = {
.ndo_set_mac_address = eth_mac_addr,
.ndo_change_mtu = internal_dev_change_mtu,
.ndo_get_stats64 = internal_get_stats,
+ .ndo_set_rx_headroom = internal_set_rx_headroom,
};
static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
@@ -158,7 +164,8 @@ static void do_setup(struct net_device *netdev)
netdev->netdev_ops = &internal_dev_netdev_ops;
netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
- netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH;
+ netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH |
+ IFF_PHONY_HEADROOM;
netdev->destructor = internal_dev_destructor;
netdev->ethtool_ops = &internal_dev_ethtool_ops;
netdev->rtnl_link_ops = &internal_dev_link_ops;
@@ -199,6 +206,7 @@ static struct vport *internal_dev_create(const struct vport_parms *parms)
err = -ENOMEM;
goto error_free_netdev;
}
+ vport->dev->needed_headroom = vport->dp->max_headroom;
dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
internal_dev = internal_dev_priv(vport->dev);