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Message-ID: <20081029125912.002dbe9d@extreme>
Date: Wed, 29 Oct 2008 12:59:12 -0700
From: Stephen Hemminger <shemminger@...tta.com>
To: Patrick McHardy <kaber@...sh.net>
Cc: netdev@...r.kernel.org
Subject: [PATCH 2/2] macvlan: propogate mtu changes
If MTU of underlying real device is changed, propogate up to macvlan
pseudo devices.
Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
--- a/drivers/net/macvlan.c 2008-10-29 09:53:00.000000000 -0700
+++ b/drivers/net/macvlan.c 2008-10-29 12:58:40.000000000 -0700
@@ -537,6 +537,19 @@ static int macvlan_device_event(struct n
list_for_each_entry_safe(vlan, next, &port->vlans, list)
macvlan_dellink(vlan->dev);
break;
+ case NETDEV_CHANGEMTU:
+ list_for_each_entry(vlan, &port->vlans, list) {
+ int err, oldmtu = vlan->dev->mtu;
+
+ err = dev_set_mtu(vlan->dev, dev->mtu);
+ if (err) {
+ list_for_each_entry_continue_reverse(vlan,
+ &port->vlans,
+ list)
+ dev_set_mtu(vlan->dev, oldmtu);
+ return notifier_from_errno(err);
+ }
+ }
}
return NOTIFY_DONE;
}
--
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