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net: Simplfy default_device_exit and improve batching.

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- Defer dellink to net_cleanup() allowing for batching.
- Fix comment.
- Use for_each_netdev_safe again as dev_change_net_namespace touches
  at most one network device (unlike veth dellink).

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2009-11-29 22:25:30 +00:00 committed by David S. Miller
parent 999b6d39ab
commit e008b5fc8d
1 changed files with 6 additions and 10 deletions
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16
net/core/dev.c
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@ -5736,14 +5736,13 @@ static struct pernet_operations __net_initdata netdev_net_ops = {
static void __net_exit default_device_exit(struct net *net)
{
struct net_device *dev;
struct net_device *dev, *aux;
/*
* Push all migratable of the network devices back to the
* Push all migratable network devices back to the
* initial network namespace
*/
rtnl_lock();
restart:
for_each_netdev(net, dev) {
for_each_netdev_safe(net, dev, aux) {
int err;
char fb_name[IFNAMSIZ];
@ -5751,11 +5750,9 @@ static void __net_exit default_device_exit(struct net *net)
if (dev->features & NETIF_F_NETNS_LOCAL)
continue;
/* Delete virtual devices */
if (dev->rtnl_link_ops && dev->rtnl_link_ops->dellink) {
dev->rtnl_link_ops->dellink(dev, NULL);
goto restart;
}
/* Leave virtual devices for the generic cleanup */
if (dev->rtnl_link_ops)
continue;
/* Push remaing network devices to init_net */
snprintf(fb_name, IFNAMSIZ, "dev%d", dev->ifindex);
@ -5765,7 +5762,6 @@ static void __net_exit default_device_exit(struct net *net)
__func__, dev->name, err);
BUG();
}
goto restart;
}
rtnl_unlock();
}