vlan: introduce __vlan_find_dev_deep()
Since vlan_group_get_device and vlan_group is not going to be accessible
from device drivers, introduce function which substitutes it.
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index fcc6846..5940366 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -63,6 +63,27 @@
return true;
}
+/* Must be invoked with rcu_read_lock or with RTNL. */
+struct net_device *__vlan_find_dev_deep(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);
+ } else {
+ /*
+ * Bonding slaves do not have grp assigned to themselves.
+ * Grp is assigned to bonding master instead.
+ */
+ if (netif_is_bond_slave(real_dev))
+ return __vlan_find_dev_deep(real_dev->master, vlan_id);
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL(__vlan_find_dev_deep);
+
struct net_device *vlan_dev_real_dev(const struct net_device *dev)
{
return vlan_dev_info(dev)->real_dev;