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-rw-r--r--src/vnet/interface.c62
1 files changed, 13 insertions, 49 deletions
diff --git a/src/vnet/interface.c b/src/vnet/interface.c
index 28c46110851..b07a9ba7553 100644
--- a/src/vnet/interface.c
+++ b/src/vnet/interface.c
@@ -122,55 +122,20 @@ unserialize_vnet_sw_interface_set_flags (serialize_main_t * m, va_list * va)
/* helper_flags no redistribution */ 0);
}
-static void
-vnet_sw_interface_set_mtu_cb (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
-{
- u32 *mtu = ctx;
- vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
- ASSERT (si);
-
- si->max_l3_packet_bytes[VLIB_TX] = si->max_l3_packet_bytes[VLIB_RX] = *mtu;
- adj_mtu_update (sw_if_index);
-}
-
-/*
- * MTU is set per software interface. Setting MTU on a parent
- * interface will override the MTU setting on sub-interfaces.
- * TODO: If sub-interface MTU is ~0 inherit from parent?
- */
-int
-vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
+void
+vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
{
- vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
- vnet_hw_interface_t *hi = vnet_get_sw_hw_interface (vnm, sw_if_index);
-
- if (mtu < hi->min_packet_bytes)
- return VNET_API_ERROR_INVALID_VALUE;
- if (mtu > hi->max_packet_bytes)
- return VNET_API_ERROR_INVALID_VALUE;
+ vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
- /* If done on a parent interface */
- if (si->sw_if_index == si->sup_sw_if_index)
+ if (hi->max_packet_bytes != mtu)
{
- if (hi->hw_class_index == ethernet_hw_interface_class.index)
- {
- ethernet_set_flags (vnm, hi->hw_if_index,
- ETHERNET_INTERFACE_FLAG_MTU);
- }
-
- /* Override MTU on any sub-interface */
- vnet_hw_interface_walk_sw (vnm,
- hi->hw_if_index,
- vnet_sw_interface_set_mtu_cb, &mtu);
+ u16 l3_pad = hi->max_packet_bytes - hi->max_l3_packet_bytes[VLIB_TX];
+ hi->max_packet_bytes = mtu;
+ hi->max_l3_packet_bytes[VLIB_TX] =
+ hi->max_l3_packet_bytes[VLIB_RX] = mtu - l3_pad;
+ ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
+ adj_mtu_update (hw_if_index);
}
- else
- {
- si->max_l3_packet_bytes[VLIB_TX] = si->max_l3_packet_bytes[VLIB_RX] =
- mtu;
- adj_mtu_update (sw_if_index);
- }
-
- return 0;
}
static void
@@ -619,9 +584,6 @@ vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
sw->sup_sw_if_index = sw->sw_if_index;
- sw->max_l3_packet_bytes[VLIB_RX] = ~0;
- sw->max_l3_packet_bytes[VLIB_TX] = ~0;
-
/* Allocate counters for this interface. */
{
u32 i;
@@ -796,7 +758,9 @@ vnet_register_interface (vnet_main_t * vnm,
hw->max_rate_bits_per_sec = 0;
hw->min_packet_bytes = 0;
- hw->max_packet_bytes = 9000; /* default */
+ hw->per_packet_overhead_bytes = 0;
+ hw->max_l3_packet_bytes[VLIB_RX] = ~0;
+ hw->max_l3_packet_bytes[VLIB_TX] = ~0;
if (dev_class->tx_function == 0)
goto no_output_nodes; /* No output/tx nodes to create */