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authorJesse Gross <jesse@nicira.com>2012-05-25 11:29:30 -0700
committerJesse Gross <jesse@nicira.com>2012-05-25 11:29:30 -0700
commit7fe99e2d434eafeac0c57b279a77e5de39212636 (patch)
tree7648c2656ba21d500ba21f0f38b489e5643d0564 /net/openvswitch
parentcaf2ee14bbc2c6bd73cf0decf576007e0239a482 (diff)
downloadlinux-7fe99e2d434eafeac0c57b279a77e5de39212636.tar.gz
openvswitch: Reset upper layer protocol info on internal devices.
It's possible that packets that are sent on internal devices (from the OVS perspective) have already traversed the local IP stack. After they go through the internal device, they will again travel through the IP stack which may get confused by the presence of existing information in the skb. The problem can be observed when switching between namespaces. This clears out that information to avoid problems but deliberately leaves other metadata alone. This is to provide maximum flexibility in chaining together OVS and other Linux components. Signed-off-by: Jesse Gross <jesse@nicira.com>
Diffstat (limited to 'net/openvswitch')
-rw-r--r--net/openvswitch/vport-internal_dev.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c
index de509d34711..4061b9ee07f 100644
--- a/net/openvswitch/vport-internal_dev.c
+++ b/net/openvswitch/vport-internal_dev.c
@@ -24,6 +24,9 @@
#include <linux/ethtool.h>
#include <linux/skbuff.h>
+#include <net/dst.h>
+#include <net/xfrm.h>
+
#include "datapath.h"
#include "vport-internal_dev.h"
#include "vport-netdev.h"
@@ -209,6 +212,11 @@ static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
int len;
len = skb->len;
+
+ skb_dst_drop(skb);
+ nf_reset(skb);
+ secpath_reset(skb);
+
skb->dev = netdev;
skb->pkt_type = PACKET_HOST;
skb->protocol = eth_type_trans(skb, netdev);