netdev - [PATCH net-next-2.6 2/2] ip_gre: add multiqueue support

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Date:	Fri, 17 Sep 2010 10:35:36 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next-2.6 2/2] ip_gre: add multiqueue support

Enable multiqueue support for non fallback GRE tunnels.

# ip link add gre34 txqueues 8 type gre remote A.B.C.D

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
 net/ipv4/ip_gre.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index fc20e68..c708a25 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -664,7 +664,8 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
 	struct net_device_stats *stats = &dev->stats;
-	struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
+	int n = skb_get_queue_mapping(skb);
+	struct netdev_queue *txq = netdev_get_tx_queue(dev, n);
 	struct iphdr  *old_iph = ip_hdr(skb);
 	struct iphdr  *tiph;
 	u8     tos;
@@ -1490,6 +1491,8 @@ static int ipgre_newlink(struct net *src_net, struct net_device *dev, struct nla
 	if (!tb[IFLA_MTU])
 		dev->mtu = mtu;
 
+	dev->real_num_tx_queues = dev->num_tx_queues;
+
 	err = register_netdevice(dev);
 	if (err)
 		goto out;


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