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ovs: propagate per dp max headroom to all vports

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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>
This commit is contained in:
Paolo Abeni 2016-02-26 10:45:39 +01:00 • committed by David S. Miller
parent 45493d47c3
commit 3a927bc7cf
3 changed files with 53 additions and 1 deletions
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10
net/openvswitch/vport-internal_dev.c
View file

@ -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);