net/vlan: Provide read access to the vlan egress map

Provide a method for read-only access to the vlan device egress mapping.

Do this by refactoring vlan_dev_get_egress_qos_mask() such that now it
receives as an argument the skb priority instead of pointer to the skb.

Such an access is needed for the IBoE stack where the control plane
goes through the network stack. This is an add-on step on top of commit
d4a968658c "net/route: export symbol ip_tos2prio" which allowed the RDMA-CM
to use ip_tos2prio.

Signed-off-by: Eyal Perry <eyalpe@mellanox.com>
Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 1 deletions

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 715c343f7c00..f3088a0112cf 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -88,7 +88,8 @@ extern struct net_device *__vlan_find_dev_deep(struct net_device *real_dev,
                                                __be16 vlan_proto, u16 vlan_id);
 extern struct net_device *vlan_dev_real_dev(const struct net_device *dev);
 extern u16 vlan_dev_vlan_id(const struct net_device *dev);
-
+extern u16 vlan_dev_get_egress_qos_mask(struct net_device *dev,
+                                        u32 skprio);
 extern bool vlan_do_receive(struct sk_buff **skb);
 extern struct sk_buff *vlan_untag(struct sk_buff *skb);
 
@@ -121,6 +122,12 @@ static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
         return 0;
 }
 
+static inline u16 vlan_dev_get_egress_qos_mask(struct net_device *dev,
+                                               u32 skprio)
+{
+        return 0;
+}
+
 static inline bool vlan_do_receive(struct sk_buff **skb)
 {
         return false;