From 37c3185a02d4b85fbe134bf5204535405dd2c957 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 22 Jun 2006 03:07:29 -0700 Subject: [NET]: Added GSO toggle This patch adds a generic segmentation offload toggle that can be turned on/off for each net device. For now it only supports in TCPv4. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/bridge/br_if.c | 17 +++++++++++------ net/core/ethtool.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+), 6 deletions(-) (limited to 'net') diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index fdec773f5b52..07956ecf545e 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -376,15 +376,20 @@ void br_features_recompute(struct net_bridge *br) features = br->feature_mask & ~NETIF_F_ALL_CSUM; list_for_each_entry(p, &br->port_list, list) { - if (checksum & NETIF_F_NO_CSUM && - !(p->dev->features & NETIF_F_NO_CSUM)) + unsigned long feature = p->dev->features; + + if (checksum & NETIF_F_NO_CSUM && !(feature & NETIF_F_NO_CSUM)) checksum ^= NETIF_F_NO_CSUM | NETIF_F_HW_CSUM; - if (checksum & NETIF_F_HW_CSUM && - !(p->dev->features & NETIF_F_HW_CSUM)) + if (checksum & NETIF_F_HW_CSUM && !(feature & NETIF_F_HW_CSUM)) checksum ^= NETIF_F_HW_CSUM | NETIF_F_IP_CSUM; - if (!(p->dev->features & NETIF_F_IP_CSUM)) + if (!(feature & NETIF_F_IP_CSUM)) checksum = 0; - features &= p->dev->features; + + if (feature & NETIF_F_GSO) + feature |= NETIF_F_TSO; + feature |= NETIF_F_GSO; + + features &= feature; } br->dev->features = features | checksum | NETIF_F_LLTX; diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 33ce7ed6afc6..27ce1683caf5 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -614,6 +614,29 @@ static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr) return dev->ethtool_ops->set_ufo(dev, edata.data); } +static int ethtool_get_gso(struct net_device *dev, char __user *useraddr) +{ + struct ethtool_value edata = { ETHTOOL_GGSO }; + + edata.data = dev->features & NETIF_F_GSO; + if (copy_to_user(useraddr, &edata, sizeof(edata))) + return -EFAULT; + return 0; +} + +static int ethtool_set_gso(struct net_device *dev, char __user *useraddr) +{ + struct ethtool_value edata; + + if (copy_from_user(&edata, useraddr, sizeof(edata))) + return -EFAULT; + if (edata.data) + dev->features |= NETIF_F_GSO; + else + dev->features &= ~NETIF_F_GSO; + return 0; +} + static int ethtool_self_test(struct net_device *dev, char __user *useraddr) { struct ethtool_test test; @@ -905,6 +928,12 @@ int dev_ethtool(struct ifreq *ifr) case ETHTOOL_SUFO: rc = ethtool_set_ufo(dev, useraddr); break; + case ETHTOOL_GGSO: + rc = ethtool_get_gso(dev, useraddr); + break; + case ETHTOOL_SGSO: + rc = ethtool_set_gso(dev, useraddr); + break; default: rc = -EOPNOTSUPP; } -- cgit v1.2.3-59-g8ed1b