datapath: Consistently maintain checksum offloading state.

[sliver-openvswitch.git] / datapath / datapath.h

diff --git a/datapath/datapath.h b/datapath/datapath.h
index 6732b59..d9fe4b2 100644 (file)
--- a/datapath/datapath.h
+++ b/datapath/datapath.h
@@ -182,6 +182,23 @@ struct net_bridge_port {
        atomic_t sflow_pool;
 };
 
+enum csum_type {
+       CSUM_NONE = 0,
+       CSUM_UNNECESSARY = 1,
+       CSUM_COMPLETE = 2,
+       CSUM_PARTIAL = 3,
+};
+
+/**
+ * struct ovs_skb_cb - OVS data in skb CB
+ * @ip_summed: Consistently stores L4 checksumming status across different
+ * kernel versions.
+ */
+struct ovs_skb_cb {
+       enum csum_type  ip_summed;
+};
+#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
+
 extern struct notifier_block dp_device_notifier;
 extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);