net: skbuff: Export __skb_vlan_pop

This exports the functionality of extracting the tag from the payload,
without moving next vlan tag into hw accel tag.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 6 insertions, 2 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index c6dab3f7457c..9bf60b556bd2 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3085,6 +3085,7 @@ bool skb_gso_validate_mtu(const struct sk_buff *skb, unsigned int mtu);
 struct sk_buff *skb_segment(struct sk_buff *skb, netdev_features_t features);
 struct sk_buff *skb_vlan_untag(struct sk_buff *skb);
 int skb_ensure_writable(struct sk_buff *skb, int write_len);
+int __skb_vlan_pop(struct sk_buff *skb, u16 *vlan_tci);
 int skb_vlan_pop(struct sk_buff *skb);
 int skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci);
 struct sk_buff *pskb_extract(struct sk_buff *skb, int off, int to_copy,
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 7bf82a28e10a..6c22351bd519 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -4522,8 +4522,10 @@ int skb_ensure_writable(struct sk_buff *skb, int write_len)
 }
 EXPORT_SYMBOL(skb_ensure_writable);
 
-/* remove VLAN header from packet and update csum accordingly. */
-static int __skb_vlan_pop(struct sk_buff *skb, u16 *vlan_tci)
+/* remove VLAN header from packet and update csum accordingly.
+ * expects a non skb_vlan_tag_present skb with a vlan tag payload
+ */
+int __skb_vlan_pop(struct sk_buff *skb, u16 *vlan_tci)
 {
         struct vlan_hdr *vhdr;
         unsigned int offset = skb->data - skb_mac_header(skb);
@@ -4554,6 +4556,7 @@ pull:
 
         return err;
 }
+EXPORT_SYMBOL(__skb_vlan_pop);
 
 int skb_vlan_pop(struct sk_buff *skb)
 {