Commit b01f236c authored Jan 16, 2014 by Veaceslav Falico Committed by David S. Miller Jan 16, 2014

team: block mtu change before it happens via NETDEV_PRECHANGEMTU



Now it catches the NETDEV_CHANGEMTU notification, which is signaled after
the actual change happened on the device, and returns NOTIFY_BAD, so that
the change on the device is reverted.

This might be quite costly and messy, so use the new NETDEV_PRECHANGEMTU to
catch the MTU change before the actual change happens and signal that it's
forbidden to do it.

CC: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 1d486bfb

drivers/net/team/team.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2851,7 +2851,7 @@ static int team_device_event(struct notifier_block *unused,
		case NETDEV_FEAT_CHANGE:
		team_compute_features(port->team);
		break;
		case NETDEV_CHANGEMTU:
		case NETDEV_PRECHANGEMTU:
		/* Forbid to change mtu of underlaying device */
		return NOTIFY_BAD;
		case NETDEV_PRE_TYPE_CHANGE:

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