interface: improve MTU handling

[vpp.git] / src / vnet / interface.c

diff --git a/src/vnet/interface.c b/src/vnet/interface.c
index 05a1c7c..a1493c6 100644 (file)
--- a/src/vnet/interface.c
+++ b/src/vnet/interface.c
@@ -772,6 +772,9 @@ clib_error_t *
 vnet_hw_interface_set_mtu (vnet_main_t *vnm, u32 hw_if_index, u32 mtu)
 {
   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
+  vnet_hw_interface_class_t *hw_if_class =
+    vnet_get_hw_interface_class (vnm, hi->hw_class_index);
+  clib_error_t *err = 0;
 
   if (hi->max_packet_bytes != mtu)
     {
@@ -781,8 +784,10 @@ vnet_hw_interface_set_mtu (vnet_main_t *vnm, u32 hw_if_index, u32 mtu)
                           "requested mtu must be in the %u to %u range",
                           hi->min_supported_packet_bytes,
                           hi->max_supported_packet_bytes);
+      if (hw_if_class->set_mtu)
+       if ((err = hw_if_class->set_mtu (vnm, hi, mtu)))
+         return err;
       hi->max_packet_bytes = mtu;
-      ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
                                 &mtu);
     }