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Commit b01f236c authored by Veaceslav Falico's avatar Veaceslav Falico Committed by David S. Miller
Browse files

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: default avatarVeaceslav Falico <vfalico@redhat.com>
Acked-by: default avatarJiri Pirko <jiri@resnulli.us>
Signed-off-by: default avatarDavid 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: