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Commit be9eac48 authored by Michal Kubeček's avatar Michal Kubeček Committed by David S. Miller
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macvlan: introduce macvlan_dev_real_dev() helper function 



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: default avatarMichal Kubecek <mkubecek@suse.cz>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f9de11a1

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 */