vlan: add helper which can be called to see if device is used by vlan
also, remove unused vlan_info definition from header
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index a810987..e6ff12d 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -74,8 +74,6 @@
/* found in socket.c */
extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *));
-struct vlan_info;
-
static inline int is_vlan_dev(struct net_device *dev)
{
return dev->priv_flags & IFF_802_1Q_VLAN;
@@ -101,6 +99,8 @@
const struct net_device *by_dev);
extern void vlan_vids_del_by_dev(struct net_device *dev,
const struct net_device *by_dev);
+
+extern bool vlan_uses_dev(const struct net_device *dev);
#else
static inline struct net_device *
__vlan_find_dev_deep(struct net_device *real_dev, u16 vlan_id)
@@ -151,6 +151,11 @@
const struct net_device *by_dev)
{
}
+
+static inline bool vlan_uses_dev(const struct net_device *dev)
+{
+ return false;
+}
#endif
/**
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 8ca533c..b258da8 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -368,3 +368,9 @@
vlan_vid_del(dev, vid_info->vid);
}
EXPORT_SYMBOL(vlan_vids_del_by_dev);
+
+bool vlan_uses_dev(const struct net_device *dev)
+{
+ return rtnl_dereference(dev->vlan_info) ? true : false;
+}
+EXPORT_SYMBOL(vlan_uses_dev);