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| author | David Lamparter <equinox@diac24.net> | 2010-09-17 03:22:19 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-17 16:46:04 -0700 |
| commit | 3b27e105550f7c4a79ecb6d6a9c49c651c59ae9b (patch) | |
| tree | 5603f5c9322f40d40a63efe5519c0a9bf164b972 /net | |
| parent | b71c7aaa1e2a9858f0c469026098fbd6e046d7bb (diff) | |
| download | lwn-3b27e105550f7c4a79ecb6d6a9c49c651c59ae9b.tar.gz lwn-3b27e105550f7c4a79ecb6d6a9c49c651c59ae9b.zip | |
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: David Lamparter <equinox@diac24.net>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Daniel Lezcano <daniel.lezcano@free.fr>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/8021q/vlan.c | 4 | ||||
| -rw-r--r-- | net/core/dev.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index a2ad15250575..2c6c2bd6e4a9 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -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; diff --git a/net/core/dev.c b/net/core/dev.c index c09ff096525a..2c7934f8cf3e 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -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); |