[IPv4/IPv6]: UFO Scatter-gather approach

[mirror_ubuntu-zesty-kernel.git] / net / core / ethtool.c

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 404b761e82ce8d712412717b58fb139478ed4b37..0350586e91956d230483d82d417938c39cf90805 100644 (file)
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -93,6 +93,20 @@ int ethtool_op_get_perm_addr(struct net_device *dev, struct ethtool_perm_addr *a
 }
  
 
+u32 ethtool_op_get_ufo(struct net_device *dev)
+{
+       return (dev->features & NETIF_F_UFO) != 0;
+}
+
+int ethtool_op_set_ufo(struct net_device *dev, u32 data)
+{
+       if (data)
+               dev->features |= NETIF_F_UFO;
+       else
+               dev->features &= ~NETIF_F_UFO;
+       return 0;
+}
+
 /* Handlers for each ethtool command */
 
 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
@@ -483,6 +497,11 @@ static int __ethtool_set_sg(struct net_device *dev, u32 data)
                        return err;
        }
 
+       if (!data && dev->ethtool_ops->set_ufo) {
+               err = dev->ethtool_ops->set_ufo(dev, 0);
+               if (err)
+                       return err;
+       }
        return dev->ethtool_ops->set_sg(dev, data);
 }
 
@@ -569,6 +588,32 @@ static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
        return dev->ethtool_ops->set_tso(dev, edata.data);
 }
 
+static int ethtool_get_ufo(struct net_device *dev, char __user *useraddr)
+{
+       struct ethtool_value edata = { ETHTOOL_GTSO };
+
+       if (!dev->ethtool_ops->get_ufo)
+               return -EOPNOTSUPP;
+       edata.data = dev->ethtool_ops->get_ufo(dev);
+       if (copy_to_user(useraddr, &edata, sizeof(edata)))
+                return -EFAULT;
+       return 0;
+}
+static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
+{
+       struct ethtool_value edata;
+
+       if (!dev->ethtool_ops->set_ufo)
+               return -EOPNOTSUPP;
+       if (copy_from_user(&edata, useraddr, sizeof(edata)))
+               return -EFAULT;
+       if (edata.data && !(dev->features & NETIF_F_SG))
+               return -EINVAL;
+       if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
+               return -EINVAL;
+       return dev->ethtool_ops->set_ufo(dev, edata.data);
+}
+
 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 {
        struct ethtool_test test;
@@ -854,6 +899,12 @@ int dev_ethtool(struct ifreq *ifr)
        case ETHTOOL_GPERMADDR:
                rc = ethtool_get_perm_addr(dev, useraddr);
                break;
+       case ETHTOOL_GUFO:
+               rc = ethtool_get_ufo(dev, useraddr);
+               break;
+       case ETHTOOL_SUFO:
+               rc = ethtool_set_ufo(dev, useraddr);
+               break;
        default:
                rc =  -EOPNOTSUPP;
        }
@@ -882,3 +933,5 @@ EXPORT_SYMBOL(ethtool_op_set_sg);
 EXPORT_SYMBOL(ethtool_op_set_tso);
 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
+EXPORT_SYMBOL(ethtool_op_set_ufo);
+EXPORT_SYMBOL(ethtool_op_get_ufo);