vlan: introduce *vlan_hwaccel_push_inside helpers
Use them to push skb->vlan_tci into the payload and avoid code
duplication.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 46e4a15..291e670 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -341,6 +341,40 @@
return skb;
}
+/*
+ * __vlan_hwaccel_push_inside - pushes vlan tag to the payload
+ * @skb: skbuff to tag
+ *
+ * Pushes the VLAN tag from @skb->vlan_tci inside to the payload.
+ *
+ * Following the skb_unshare() example, in case of error, the calling function
+ * doesn't have to worry about freeing the original skb.
+ */
+static inline struct sk_buff *__vlan_hwaccel_push_inside(struct sk_buff *skb)
+{
+ skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
+ vlan_tx_tag_get(skb));
+ if (likely(skb))
+ skb->vlan_tci = 0;
+ return skb;
+}
+/*
+ * vlan_hwaccel_push_inside - pushes vlan tag to the payload
+ * @skb: skbuff to tag
+ *
+ * Checks is tag is present in @skb->vlan_tci and if it is, it pushes the
+ * VLAN tag from @skb->vlan_tci inside to the payload.
+ *
+ * Following the skb_unshare() example, in case of error, the calling function
+ * doesn't have to worry about freeing the original skb.
+ */
+static inline struct sk_buff *vlan_hwaccel_push_inside(struct sk_buff *skb)
+{
+ if (vlan_tx_tag_present(skb))
+ skb = __vlan_hwaccel_push_inside(skb);
+ return skb;
+}
+
/**
* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
* @skb: skbuff to tag