[ETHTOOL]: Add ethtool_op_{set,get}_tso helpers.

include/linux/ethtool.h

@@ -257,6 +257,8 @@ u32 ethtool_op_get_link(struct net_device *dev);
 u32 ethtool_op_get_tx_csum(struct net_device *dev);
 u32 ethtool_op_get_sg(struct net_device *dev);
 int ethtool_op_set_sg(struct net_device *dev, u32 data);
+u32 ethtool_op_get_tso(struct net_device *dev);
+int ethtool_op_set_tso(struct net_device *dev, u32 data);
 
 /**
  * &ethtool_ops - Alter and report network device settings

net/core/ethtool.c

@@ -45,6 +45,21 @@ int ethtool_op_set_sg(struct net_device *dev, u32 data)
 	return 0;
 }
 
+u32 ethtool_op_get_tso(struct net_device *dev)
+{
+	return (dev->features & NETIF_F_TSO) != 0;
+}
+
+int ethtool_op_set_tso(struct net_device *dev, u32 data)
+{
+	if (data)
+		dev->features |= NETIF_F_TSO;
+	else
+		dev->features &= ~NETIF_F_TSO;
+
+	return 0;
+}
+
 /* Handlers for each ethtool command */
 
 static int ethtool_get_settings(struct net_device *dev, void *useraddr)

net/netsyms.c

@@ -633,5 +633,7 @@ EXPORT_SYMBOL(ethtool_op_get_link);
 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
 EXPORT_SYMBOL(ethtool_op_get_sg);
 EXPORT_SYMBOL(ethtool_op_set_sg);
+EXPORT_SYMBOL(ethtool_op_get_tso);
+EXPORT_SYMBOL(ethtool_op_set_tso);
 
 #endif  /* CONFIG_NET */