net: report min and max mtu network device settings

Report the minimum and maximum MTU allowed on a device
via netlink so that it can be displayed by tools like
ip link.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 553c438cabe3..43391e2d1153 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -164,6 +164,8 @@ enum {
         IFLA_CARRIER_UP_COUNT,
         IFLA_CARRIER_DOWN_COUNT,
         IFLA_NEW_IFINDEX,
+        IFLA_MIN_MTU,
+        IFLA_MAX_MTU,
         __IFLA_MAX
 };