net: Introduce passthru_features_check

As there are a number of (especially virtual) devices that don't
need the multiple vlan check, introduce passthru_features_check() for
convenience.

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 08c4ab37189fcb25dcc4e076ae8a81792fc8aeeb..967bb4c8caf16aa88d0a2645a3b754fd1f08b1ab 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3657,6 +3657,9 @@ void netdev_change_features(struct net_device *dev);
 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
                                        struct net_device *dev);
 
+netdev_features_t passthru_features_check(struct sk_buff *skb,
+                                         struct net_device *dev,
+                                         netdev_features_t features);
 netdev_features_t netif_skb_features(struct sk_buff *skb);
 
 static inline bool net_gso_ok(netdev_features_t features, int gso_type)

diff --git a/net/core/dev.c b/net/core/dev.c
index cb46badbef5a7d791fdbf374ac06fb61a71d6869..3a06003ecafd307acf8b1fae3182e81b5a2ac328 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2562,6 +2562,14 @@ static netdev_features_t harmonize_features(struct sk_buff *skb,
        return features;
 }
 
+netdev_features_t passthru_features_check(struct sk_buff *skb,
+                                         struct net_device *dev,
+                                         netdev_features_t features)
+{
+       return features;
+}
+EXPORT_SYMBOL(passthru_features_check);
+
 static netdev_features_t dflt_features_check(const struct sk_buff *skb,
                                             struct net_device *dev,
                                             netdev_features_t features)