[PATCH net-next v2 18/27] net/skbuff: add macros for VLAN_PRESENT bit

[Michał Mirosław]

Signed-off-by: Michał Mirosław <mirq-li...@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 b53c0cfd417e..168c3e486bd4 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)
-- 
2.11.0