[patch net-next 11/16] vlan: remove usage of dev->master in __vlan_find_dev_deep()
From: Jiri Pirko <jiri@resnulli.us>
Date: 2012-08-13 15:29:48
Also in:
bridge, linux-s390, lkml, netdev
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Also, since all users call __vlan_find_dev_deep() with rcu_read_lock, make no possibility to call this with rtnl mutex held only. Signed-off-by: Jiri Pirko <jiri@resnulli.us> --- net/8021q/vlan_core.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 8ca533c..f9518ad 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c@@ -66,21 +66,25 @@ bool vlan_do_receive(struct sk_buff **skbp, bool last_handler) return true; } -/* Must be invoked with rcu_read_lock or with RTNL. */ -struct net_device *__vlan_find_dev_deep(struct net_device *real_dev, +/* Must be invoked with rcu_read_lock. */ +struct net_device *__vlan_find_dev_deep(struct net_device *dev, u16 vlan_id) { - struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info); + struct vlan_info *vlan_info = rcu_dereference(dev->vlan_info); if (vlan_info) { return vlan_group_get_device(&vlan_info->grp, vlan_id); } else { /* - * Bonding slaves do not have grp assigned to themselves. - * Grp is assigned to bonding master instead. + * Lower devices of unique uppers (bonding, team) do not have + * grp assigned to themselves. Grp is assigned to upper device + * instead. */ - if (netif_is_bond_slave(real_dev)) - return __vlan_find_dev_deep(real_dev->master, vlan_id); + struct net_device *upper_dev; + + upper_dev = netdev_unique_upper_dev_get_rcu(dev); + if (upper_dev) + return __vlan_find_dev_deep(upper_dev, vlan_id); } return NULL;
--
1.7.10.4