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authorstephen hemminger <shemminger@vyatta.com>2011-10-06 11:19:41 +0000
committerDavid S. Miller <davem@davemloft.net>2011-10-18 23:24:16 -0400
commit1ce5cce895309862d2c35d922816adebe094fe4a (patch)
tree15e92f7f8f7a78843ec797bcd4b432979be111a7
parentae2a4583154a5b985ed4a81c6259c55bafe6d810 (diff)
downloadlinux-stericsson-1ce5cce895309862d2c35d922816adebe094fe4a.tar.gz
bridge: fix hang on removal of bridge via netlink
Need to cleanup bridge device timers and ports when being bridge device is being removed via netlink. This fixes the problem of observed when doing: ip link add br0 type bridge ip link set dev eth1 master br0 ip link set br0 up ip link del br0 which would cause br0 to hang in unregister_netdev because of leftover reference count. Reported-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/bridge/br_if.c9
-rw-r--r--net/bridge/br_netlink.c1
-rw-r--r--net/bridge/br_private.h1
3 files changed, 7 insertions, 4 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index e73815456adf..1d420f64ff27 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -161,9 +161,10 @@ static void del_nbp(struct net_bridge_port *p)
call_rcu(&p->rcu, destroy_nbp_rcu);
}
-/* called with RTNL */
-static void del_br(struct net_bridge *br, struct list_head *head)
+/* Delete bridge device */
+void br_dev_delete(struct net_device *dev, struct list_head *head)
{
+ struct net_bridge *br = netdev_priv(dev);
struct net_bridge_port *p, *n;
list_for_each_entry_safe(p, n, &br->port_list, list) {
@@ -268,7 +269,7 @@ int br_del_bridge(struct net *net, const char *name)
}
else
- del_br(netdev_priv(dev), NULL);
+ br_dev_delete(dev, NULL);
rtnl_unlock();
return ret;
@@ -449,7 +450,7 @@ void __net_exit br_net_exit(struct net *net)
rtnl_lock();
for_each_netdev(net, dev)
if (dev->priv_flags & IFF_EBRIDGE)
- del_br(netdev_priv(dev), &list);
+ br_dev_delete(dev, &list);
unregister_netdevice_many(&list);
rtnl_unlock();
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 5b1ed1ba9aa7..e5f9ece3c9a0 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -210,6 +210,7 @@ static struct rtnl_link_ops br_link_ops __read_mostly = {
.priv_size = sizeof(struct net_bridge),
.setup = br_dev_setup,
.validate = br_validate,
+ .dellink = br_dev_delete,
};
int __init br_netlink_init(void)
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 78cc364997d9..857a021deea9 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -294,6 +294,7 @@ static inline int br_is_root_bridge(const struct net_bridge *br)
/* br_device.c */
extern void br_dev_setup(struct net_device *dev);
+extern void br_dev_delete(struct net_device *dev, struct list_head *list);
extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
struct net_device *dev);
#ifdef CONFIG_NET_POLL_CONTROLLER