netdev - [PATCH] veth: extend device features

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Date:	Sat, 29 Dec 2012 18:26:10 -0800
From:	Eric Dumazet <erdnetdev@...il.com>
To:	Michał Mirosław <mirqus@...il.com>,
	David Miller <davem@...emloft.net>
Cc:	Andrew Vagin <avagin@...allels.com>, netdev@...r.kernel.org,
	vvs@...allels.com,
	Michał Mirosław <mirq-linux@...e.qmqm.pl>
Subject: [PATCH] veth: extend device features

From: Eric Dumazet <edumazet@...gle.com>

veth is lacking most modern facilities, like SG, checksums, TSO.

It makes sense to extend dev->features to get them, or GRO aggregation
is defeated by a forced segmentation.

Reported-by: Andrew Vagin <avagin@...allels.com>
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Cc: Michał Mirosław <mirq-linux@...e.qmqm.pl>
---
 drivers/net/veth.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 95814d9..ccf211f 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -259,6 +259,10 @@ static const struct net_device_ops veth_netdev_ops = {
 	.ndo_set_mac_address = eth_mac_addr,
 };
 
+#define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO |    \
+		       NETIF_F_HW_CSUM | NETIF_F_RXCSUM | NETIF_F_HIGHDMA | \
+		       NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX)
+
 static void veth_setup(struct net_device *dev)
 {
 	ether_setup(dev);
@@ -269,9 +273,10 @@ static void veth_setup(struct net_device *dev)
 	dev->netdev_ops = &veth_netdev_ops;
 	dev->ethtool_ops = &veth_ethtool_ops;
 	dev->features |= NETIF_F_LLTX;
+	dev->features |= VETH_FEATURES;
 	dev->destructor = veth_dev_free;
 
-	dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_RXCSUM;
+	dev->hw_features = VETH_FEATURES;
 }
 
 /*


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