[PATCH net-next 18/27] net/skbuff: add macros for VLAN_PRESENT bit

[Michał Mirosław]

Signed-off-by: Michał Mirosław <mirq-linux at rere.qmqm.pl>
---
 include/linux/skbuff.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 332e767..4a85a1f 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -768,6 +768,12 @@ struct sk_buff {
 	__u32			priority;
 	int			skb_iif;
 	__u32			hash;
+#define PKT_VLAN_PRESENT_BIT	4	// CFI (12-th bit) in TCI
+#ifdef __BIG_ENDIAN
+#define PKT_VLAN_PRESENT_OFFSET()	offsetof(struct sk_buff, vlan_tci)
+#else
+#define PKT_VLAN_PRESENT_OFFSET()	(offsetof(struct sk_buff, vlan_tci) + 1)
+#endif
 	__be16			vlan_proto;
 	__u16			vlan_tci;
 #if defined(CONFIG_NET_RX_BUSY_POLL) || defined(CONFIG_XPS)
-- 
2.10.2