netdev - [PATCH net-next 1/6] net/skbuff: add macros for VLAN

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Message-Id: <1ff3cba5536ca5a07f6496b9c80c646738956a8f.1483492355.git.mirq-linux@rere.qmqm.pl>
Date:   Wed,  4 Jan 2017 02:18:26 +0100 (CET)
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     netdev@...r.kernel.org
Cc:     Russell King <linux@...linux.org.uk>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        "David S. Miller" <davem@...emloft.net>,
        linux-arm-kernel@...ts.infradead.org, linux-mips@...ux-mips.org,
        linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org
Subject: [PATCH net-next 1/6] net/skbuff: add macros for VLAN_PRESENT bit

Signed-off-by: Michał Mirosław <mirq-linux@...e.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