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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-07-08 23:12:21 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-07-08 23:12:21 -0700 |
| commit | a204b48ed4dc31acf61090e530430ce3272b6aab (patch) | |
| tree | 1c7615f3483720a79b83f03bc4d14f2dad622744 | |
| parent | dd4ba83dc1becbb3bb383851381c10c372e47247 (diff) | |
| download | linux-a204b48ed4dc31acf61090e530430ce3272b6aab.tar.bz2 | |
vlan: allow TSO setting on vlan interfaces
When we need to shape traffic using low speeds, we need to
disable tso on network interface :
ethtool -K eth0.2240 tso off
It seems vlan interfaces miss the set_tso() ethtool method.
Before enabling TSO, we must check real device supports
TSO for VLAN-tagged packets and enables TSO.
Note that a TSO change on real device propagates TSO setting
on all vlans, even if admin selected a different TSO setting.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/8021q/vlan_dev.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index 7865a4ce5250..a1b8171cfa7b 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -836,12 +836,32 @@ static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, st return stats; } +static int vlan_ethtool_set_tso(struct net_device *dev, u32 data) +{ + if (data) { + struct net_device *real_dev = vlan_dev_info(dev)->real_dev; + + /* Underlying device must support TSO for VLAN-tagged packets + * and must have TSO enabled now. + */ + if (!(real_dev->vlan_features & NETIF_F_TSO)) + return -EOPNOTSUPP; + if (!(real_dev->features & NETIF_F_TSO)) + return -EINVAL; + dev->features |= NETIF_F_TSO; + } else { + dev->features &= ~NETIF_F_TSO; + } + return 0; +} + static const struct ethtool_ops vlan_ethtool_ops = { .get_settings = vlan_ethtool_get_settings, .get_drvinfo = vlan_ethtool_get_drvinfo, .get_link = ethtool_op_get_link, .get_rx_csum = vlan_ethtool_get_rx_csum, .get_flags = vlan_ethtool_get_flags, + .set_tso = vlan_ethtool_set_tso, }; static const struct net_device_ops vlan_netdev_ops = { |