datapath: Add vlan acceleration field for older kernels.

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

diff --git a/datapath/vlan.h b/datapath/vlan.h
new file mode 100644 (file)
index 0000000..dc90018
--- /dev/null
+++ b/datapath/vlan.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2011 Nicira Networks.
+ * Distributed under the terms of the GNU GPL version 2.
+ *
+ * Significant portions of this file may be copied from parts of the Linux
+ * kernel, by Linus Torvalds and others.
+ */
+
+#ifndef VLAN_H
+#define VLAN_H 1
+
+#include <linux/if_vlan.h>
+#include <linux/skbuff.h>
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+#define NEED_VLAN_FIELD
+#endif
+
+#ifndef NEED_VLAN_FIELD
+static inline void vlan_copy_skb_tci(struct sk_buff *skb) { }
+
+static inline u16 vlan_get_tci(struct sk_buff *skb)
+{
+       return skb->vlan_tci;
+}
+
+static inline void vlan_set_tci(struct sk_buff *skb, u16 vlan_tci)
+{
+       skb->vlan_tci = vlan_tci;
+}
+#else
+void vlan_copy_skb_tci(struct sk_buff *skb);
+u16 vlan_get_tci(struct sk_buff *skb);
+void vlan_set_tci(struct sk_buff *skb, u16 vlan_tci);
+
+#undef vlan_tx_tag_present
+bool vlan_tx_tag_present(struct sk_buff *skb);
+
+#undef vlan_tx_tag_get
+u16 vlan_tx_tag_get(struct sk_buff *skb);
+
+#define __vlan_hwaccel_put_tag rpl__vlan_hwaccel_put_tag
+struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, u16 vlan_tci);
+#endif /* NEED_VLAN_FIELD */
+#endif /* vlan.h */