This Linux kernel change "net: vrf: remove MTU limits for vrf device" is included in the Linux 5.0 release. This change is authored by Hangbin Liu <liuhangbin [at] gmail.com> on Mon Feb 18 17:14:25 2019 +0800. The commit for this change in Linux stable tree is ad49bc6 (patch).
net: vrf: remove MTU limits for vrf device Similiar to commit e94cd8113ce63 ("net: remove MTU limits for dummy and ifb device"), MTU is irrelevant for VRF device. We init it as 64K while limit it to [68, 1500] may make users feel confused. Reported-by: Jianlin Shi <[email protected]> Signed-off-by: Hangbin Liu <[email protected]> Reviewed-by: David Ahern <[email protected]> Signed-off-by: David S. Miller <[email protected]>
There are 3 lines of Linux source code added/deleted in this change. Code changes to Linux kernel are as follows.
drivers/net/vrf.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 95909e2..7c1430e 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -1273,6 +1273,9 @@ static void vrf_setup(struct net_device *dev) /* default to no qdisc; user can add if desired */ dev->priv_flags |= IFF_NO_QUEUE; + + dev->min_mtu = 0; + dev->max_mtu = 0; } static int vrf_validate(struct nlattr *tb, struct nlattr *data,