GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-05 22:12:16 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

ovs: propagate per dp max headroom to all vports

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

40
net/openvswitch/datapath.c
View file

@ -1908,6 +1908,29 @@ static struct vport *lookup_vport(struct net *net,
return ERR_PTR(-EINVAL);
}
/* Called with ovs_mutex */
static void update_headroom(struct datapath *dp)
{
unsigned dev_headroom, max_headroom = 0;
struct net_device *dev;
struct vport *vport;
int i;
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
dev = vport->dev;
dev_headroom = netdev_get_fwd_headroom(dev);
if (dev_headroom > max_headroom)
max_headroom = dev_headroom;
}
}
dp->max_headroom = max_headroom;
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node)
netdev_set_rx_headroom(vport->dev, max_headroom);
}
static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr **a = info->attrs;
@ -1973,6 +1996,12 @@ restart:
err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
info->snd_seq, 0, OVS_VPORT_CMD_NEW);
if (netdev_get_fwd_headroom(vport->dev) > dp->max_headroom)
update_headroom(dp);
else
netdev_set_rx_headroom(vport->dev, dp->max_headroom);
BUG_ON(err < 0);
ovs_unlock();
@ -2039,8 +2068,10 @@ exit_unlock_free:
static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
{
bool must_update_headroom = false;
struct nlattr **a = info->attrs;
struct sk_buff *reply;
struct datapath *dp;
struct vport *vport;
int err;
@ -2062,7 +2093,16 @@ static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid,
info->snd_seq, 0, OVS_VPORT_CMD_DEL);
BUG_ON(err < 0);
/* the vport deletion may trigger dp headroom update */
dp = vport->dp;
if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom)
must_update_headroom = true;
netdev_reset_rx_headroom(vport->dev);
ovs_dp_detach_port(vport);
if (must_update_headroom)
update_headroom(dp);
ovs_unlock();
ovs_notify(&dp_vport_genl_family, reply, info);