From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/include/linux/if_vlan.h | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/kernel/include/linux/if_vlan.h b/kernel/include/linux/if_vlan.h
index 41a5183..4e7e72f 100644
--- a/kernel/include/linux/if_vlan.h
+++ b/kernel/include/linux/if_vlan.h
@@ -626,6 +626,23 @@
return __vlan_get_protocol(skb, skb->protocol, NULL);
}
+/* This version of __vlan_get_protocol() also pulls mac header in skb->head */
+static inline __be16 vlan_get_protocol_and_depth(struct sk_buff *skb,
+ __be16 type, int *depth)
+{
+ int maclen;
+
+ type = __vlan_get_protocol(skb, type, &maclen);
+
+ if (type) {
+ if (!pskb_may_pull(skb, maclen))
+ type = 0;
+ else if (depth)
+ *depth = maclen;
+ }
+ return type;
+}
+
/* A getter for the SKB protocol field which will handle VLAN tags consistently
* whether VLAN acceleration is enabled or not.
*/
--
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