macvlan: introduce macvlan_dev_real_dev() helper function (be9eac48) · Commits · 戴 / test

Introduce helper function macvlan_dev_real_dev which returns the underlying device of a macvlan device, similar to vlan_dev_real_dev() for 802.1q VLAN devices. v2: IFF_MACVLAN flag and equivalent of is_macvlan_dev() were introduced in the meantime v3: do BUG() if compiled without macvlan support Signed-off-by:

Michal Kubecek <mkubecek@suse.cz> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/linux/if_macvlan.h

+17 −0

Original line number	Diff line number	Diff line
		@@ -119,4 +119,21 @@ extern int macvlan_link_register(struct rtnl_link_ops *ops);
		extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
		struct net_device *dev);

		#if IS_ENABLED(CONFIG_MACVLAN)
		static inline struct net_device *
		macvlan_dev_real_dev(const struct net_device *dev)
		{
		struct macvlan_dev *macvlan = netdev_priv(dev);

		return macvlan->lowerdev;
		}
		#else
		static inline struct net_device *
		macvlan_dev_real_dev(const struct net_device *dev)
		{
		BUG();
		return NULL;
		}
		#endif

		#endif /* _LINUX_IF_MACVLAN_H */

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