[PATCH net-next V12 2/3] Check for vlan ethernet types for 8021.q or 802.1ad

From: Thomas F Herbert <thomasfherbert-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	pshelar-l0M0P4e3n4LQT0dZR+AlfA@public.gmane.org
Cc: dev-yBygre7rU0TnMu66kgdUjQ@public.gmane.org,
	therbert-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org
Subject: [PATCH net-next V12 2/3] Check for vlan ethernet types for 8021.q or 802.1ad
Date: Sun, 26 Jul 2015 10:52:34 -0400	[thread overview]
Message-ID: <1437922355-3809-3-git-send-email-thomasfherbert@gmail.com> (raw)
In-Reply-To: <1437922355-3809-1-git-send-email-thomasfherbert-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Signed-off-by: Thomas F Herbert <thomasfherbert@gmail.com>
---
 include/linux/if_vlan.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 67ce5bd..88d1be4 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -627,6 +627,23 @@ static inline netdev_features_t vlan_features_check(const struct sk_buff *skb,
 
 	return features;
 }
+/**
+ * eth_type_vlan - check for valid vlan ether type.
+ * @ethertype: ether type to check
+ *
+ * Returns true if the ether type is a vlan ether type.
+ */
+static inline bool eth_type_vlan(__be16 ethertype)
+{
+	switch (ethertype) {
+	case (htons(ETH_P_8021Q)):
+		return true;
+	case (htons(ETH_P_8021AD)):
+		return true;
+	default:
+		return false;
+	}
+}
 
 /**
  * compare_vlan_header - Compare two vlan headers
-- 
2.4.3

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