From: Chunhe Li <lichunhe@huawei.com>
Date: Wed, 30 Jul 2014 01:49:01 +0000 (+0800)
Subject: datapath: Drop packets when interdev is not up
X-Git-Tag: v2.3~8
X-Git-Url: http://git.cascardo.eti.br/?p=cascardo%2Fovs.git;a=commitdiff_plain;h=edff57a8b0b3c33351e6bbd8746313eaee8cd20c

datapath: Drop packets when interdev is not up

If the internal device is not up, it should drop received
packets. Sometimes it receive the broadcast or multicast
packets, and the ip protocol stack will casue more cpu
usage wasted.

Signed-off-by: Chunhe Li <lichunhe@huawei.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
---

diff --git a/datapath/vport-internal_dev.c b/datapath/vport-internal_dev.c
index 637d712d8..7432f1f76 100644
--- a/datapath/vport-internal_dev.c
+++ b/datapath/vport-internal_dev.c
@@ -236,6 +236,11 @@ static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
 	struct net_device *netdev = netdev_vport_priv(vport)->dev;
 	int len;
 
+	if (unlikely(!(netdev->flags & IFF_UP))) {
+		kfree_skb(skb);
+		return 0;
+	}
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
 	if (vlan_tx_tag_present(skb)) {
 		if (unlikely(!__vlan_put_tag(skb,