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[NETNS]: Add netns refcnt debug for network devices.

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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>
This commit is contained in:
Denis V. Lunev 2008-04-16 02:02:18 -07:00 committed by David S. Miller
parent 3661a91083
commit f3005d7f4a
2 changed files with 4 additions and 1 deletions
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3
include/linux/netdevice.h
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@ -758,7 +758,8 @@ static inline
void dev_net_set(struct net_device *dev, struct net *net) void dev_net_set(struct net_device *dev, struct net *net)
{ {
#ifdef CONFIG_NET_NS #ifdef CONFIG_NET_NS
dev->nd_net = net; release_net(dev->nd_net);
dev->nd_net = hold_net(net);
#endif #endif
} }

2
net/core/dev.c
View File

@ -4042,6 +4042,8 @@ EXPORT_SYMBOL(alloc_netdev_mq);
*/ */
void free_netdev(struct net_device *dev) void free_netdev(struct net_device *dev)
{ {
release_net(dev_net(dev));
/* Compatibility with error handling in drivers */ /* Compatibility with error handling in drivers */
if (dev->reg_state == NETREG_UNINITIALIZED) { if (dev->reg_state == NETREG_UNINITIALIZED) {
kfree((char *)dev - dev->padded); kfree((char *)dev - dev->padded);