[NETNS]: Add netns refcnt debug for network devices.
dev_set_net is called for
- just allocated devices
- devices moving from one namespace to another
release_net has proper check inside to distinguish these cases.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 8b17ed4..7c1d446 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -758,7 +758,8 @@
void dev_net_set(struct net_device *dev, struct net *net)
{
#ifdef CONFIG_NET_NS
- dev->nd_net = net;
+ release_net(dev->nd_net);
+ dev->nd_net = hold_net(net);
#endif
}