Commit 3b27e105 authored by David Lamparter's avatar David Lamparter Committed by David S. Miller
Browse files

netns: keep vlan slaves on master netns move



previously, if a vlan master device was moved from one network namespace
to another, all 802.1q and macvlan slaves were deleted.

we can use dev->reg_state to figure out whether dev_change_net_namespace
is happening, since that won't set dev->reg_state NETREG_UNREGISTERING.
so, this changes 8021q and macvlan to ignore NETDEV_UNREGISTER when
reg_state is not NETREG_UNREGISTERING.
Signed-off-by: default avatarDavid Lamparter <equinox@diac24.net>
Reviewed-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: default avatarDaniel Lezcano <daniel.lezcano@free.fr>
Acked-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b71c7aaa
......@@ -788,6 +788,10 @@ static int macvlan_device_event(struct notifier_block *unused,
}
break;
case NETDEV_UNREGISTER:
/* twiddle thumbs on netns device moves */
if (dev->reg_state != NETREG_UNREGISTERING)
break;
list_for_each_entry_safe(vlan, next, &port->vlans, list)
vlan->dev->rtnl_link_ops->dellink(vlan->dev, NULL);
break;
......
......@@ -525,6 +525,10 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
break;
case NETDEV_UNREGISTER:
/* twiddle thumbs on netns device moves */
if (dev->reg_state != NETREG_UNREGISTERING)
break;
/* Delete all VLANs for this dev. */
grp->killall = 1;
......
......@@ -5686,6 +5686,10 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
/* Notify protocols, that we are about to destroy
this device. They should clean all the things.
Note that dev->reg_state stays at NETREG_REGISTERED.
This is wanted because this way 8021q and macvlan know
the device is just moving and can keep their slaves up.
*/
call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
call_netdevice_notifiers(NETDEV_UNREGISTER_BATCH, dev);
......
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