net: Introduce IFF_LWT_NETDEV flag

dsahern · dsahern · commit 578bc07c34b7 · 2017-05-05T16:45:18.000-07:00
Add new flag to denote lightweight netdevices. Add helper to identify
such devices.

Signed-off-by: David Ahern &lt;dsahern@gmail.com&gt;
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
@@ -1401,6 +1401,7 @@ enum netdev_priv_flags {
 	IFF_RXFH_CONFIGURED		= 1<<25,
 	IFF_PHONY_HEADROOM		= 1<<26,
 	IFF_MACSEC			= 1<<27,
+	IFF_LWT_NETDEV			= 1<<28,
 };
 
 #define IFF_802_1Q_VLAN			IFF_802_1Q_VLAN
@@ -1430,6 +1431,7 @@ enum netdev_priv_flags {
 #define IFF_TEAM			IFF_TEAM
 #define IFF_RXFH_CONFIGURED		IFF_RXFH_CONFIGURED
 #define IFF_MACSEC			IFF_MACSEC
+#define IFF_LWT_NETDEV			IFF_LWT_NETDEV
 
 /**
  *	struct net_device - The DEVICE structure.
@@ -4137,6 +4139,11 @@ static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
 	skb->mac_len = mac_len;
 }
 
+static inline bool netif_is_lwd(struct net_device *dev)
+{
+	return !!(dev->priv_flags & IFF_LWT_NETDEV);
+}
+
 static inline bool netif_is_macsec(const struct net_device *dev)
 {
 	return dev->priv_flags & IFF_MACSEC;
