netdev - [PATCH] veth: convert to hw

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Date:	Thu, 31 Mar 2011 13:01:35 +0200 (CEST)
From:	Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:	netdev@...r.kernel.org
Cc:	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH] veth: convert to hw_features

This should probably get TSO available as it's basically a loopback device.
Offloads are left disabled by default - as before.

Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
---
 drivers/net/veth.c |   45 +++++----------------------------------------
 1 files changed, 5 insertions(+), 40 deletions(-)

diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 2de9b90..6542288 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -36,7 +36,6 @@ struct veth_net_stats {
 struct veth_priv {
 	struct net_device *peer;
 	struct veth_net_stats __percpu *stats;
-	unsigned ip_summed;
 };
 
 /*
@@ -99,47 +98,10 @@ static void veth_get_ethtool_stats(struct net_device *dev,
 	data[0] = priv->peer->ifindex;
 }
 
-static u32 veth_get_rx_csum(struct net_device *dev)
-{
-	struct veth_priv *priv;
-
-	priv = netdev_priv(dev);
-	return priv->ip_summed == CHECKSUM_UNNECESSARY;
-}
-
-static int veth_set_rx_csum(struct net_device *dev, u32 data)
-{
-	struct veth_priv *priv;
-
-	priv = netdev_priv(dev);
-	priv->ip_summed = data ? CHECKSUM_UNNECESSARY : CHECKSUM_NONE;
-	return 0;
-}
-
-static u32 veth_get_tx_csum(struct net_device *dev)
-{
-	return (dev->features & NETIF_F_NO_CSUM) != 0;
-}
-
-static int veth_set_tx_csum(struct net_device *dev, u32 data)
-{
-	if (data)
-		dev->features |= NETIF_F_NO_CSUM;
-	else
-		dev->features &= ~NETIF_F_NO_CSUM;
-	return 0;
-}
-
 static const struct ethtool_ops veth_ethtool_ops = {
 	.get_settings		= veth_get_settings,
 	.get_drvinfo		= veth_get_drvinfo,
 	.get_link		= ethtool_op_get_link,
-	.get_rx_csum		= veth_get_rx_csum,
-	.set_rx_csum		= veth_set_rx_csum,
-	.get_tx_csum		= veth_get_tx_csum,
-	.set_tx_csum		= veth_set_tx_csum,
-	.get_sg			= ethtool_op_get_sg,
-	.set_sg			= ethtool_op_set_sg,
 	.get_strings		= veth_get_strings,
 	.get_sset_count		= veth_get_sset_count,
 	.get_ethtool_stats	= veth_get_ethtool_stats,
@@ -168,8 +130,9 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	/* don't change ip_summed == CHECKSUM_PARTIAL, as that
 	   will cause bad checksum on forwarded packets */
-	if (skb->ip_summed == CHECKSUM_NONE)
-		skb->ip_summed = rcv_priv->ip_summed;
+	if (skb->ip_summed == CHECKSUM_NONE &&
+	    rcv->features & NETIF_F_RXCSUM)
+		skb->ip_summed = CHECKSUM_UNNECESSARY;
 
 	length = skb->len;
 	if (dev_forward_skb(rcv, skb) != NET_RX_SUCCESS)
@@ -304,6 +267,8 @@ static void veth_setup(struct net_device *dev)
 	dev->ethtool_ops = &veth_ethtool_ops;
 	dev->features |= NETIF_F_LLTX;
 	dev->destructor = veth_dev_free;
+
+	dev->hw_features = NETIF_F_NO_CSUM | NETIF_F_SG | NETIF_F_RXCSUM;
 }
 
 /*
-- 
1.7.2.5

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