diff mbox series

[net-next,1/6] net/skbuff: add macros for VLAN_PRESENT bit

Message ID 0f16fe1faf8961523d0e94e2c1c87d427c4fcad0.1541876179.git.mirq-linux@rere.qmqm.pl (mailing list archive)
State Not Applicable
Headers show
Series Remove VLAN.CFI overload | expand

Commit Message

Michał Mirosław Nov. 10, 2018, 6:58 p.m. UTC 
Wrap VLAN_PRESENT bit using macro like PKT_TYPE_* and CLONED_*,
as used by BPF code.

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

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 7dcfb5591dc3..99f38779332c 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -816,6 +816,12 @@  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)