Merge branch 'for-3.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

[pandora-kernel.git] / net / 8021q / vlan.h

diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 9da07e3..9fd45f3 100644 (file)
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -74,6 +74,37 @@ static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev)
        return netdev_priv(dev);
 }
 
+static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
+                                                      u16 vlan_id)
+{
+       struct net_device **array;
+       array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
+       return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
+}
+
+static inline void vlan_group_set_device(struct vlan_group *vg,
+                                        u16 vlan_id,
+                                        struct net_device *dev)
+{
+       struct net_device **array;
+       if (!vg)
+               return;
+       array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
+       array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
+}
+
+/* Must be invoked with rcu_read_lock or with RTNL. */
+static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
+                                              u16 vlan_id)
+{
+       struct vlan_group *grp = rcu_dereference_rtnl(real_dev->vlgrp);
+
+       if (grp)
+               return vlan_group_get_device(grp, vlan_id);
+
+       return NULL;
+}
+
 /* found in vlan_dev.c */
 void vlan_dev_set_ingress_priority(const struct net_device *dev,
                                   u32 skb_prio, u16 vlan_prio);