From be9eac48274a2d9b142d6dd8567b9b2362939346 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Michal=20Kube=C4=8Dek?= Date: Fri, 15 Nov 2013 06:18:40 +0100 Subject: [PATCH] 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: Michal Kubecek Signed-off-by: David S. Miller --- include/linux/if_macvlan.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/if_macvlan.h b/include/linux/if_macvlan.h index c270285..84ba5ac 100644 --- a/include/linux/if_macvlan.h +++ b/include/linux/if_macvlan.h @@ -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 */ -- 2.7.4