diff options
Diffstat (limited to 'src/vnet/interface.c')
| -rw-r--r-- | src/vnet/interface.c | 62 |
1 files changed, 49 insertions, 13 deletions
diff --git a/src/vnet/interface.c b/src/vnet/interface.c index b07a9ba7553..28c46110851 100644 --- a/src/vnet/interface.c +++ b/src/vnet/interface.c @@ -122,20 +122,55 @@ unserialize_vnet_sw_interface_set_flags (serialize_main_t * m, va_list * va) /* helper_flags no redistribution */ 0); } -void -vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu) +static void +vnet_sw_interface_set_mtu_cb (vnet_main_t * vnm, u32 sw_if_index, void *ctx) { - vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); + 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) +{ + 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; - if (hi->max_packet_bytes != mtu) + /* If done on a parent interface */ + if (si->sw_if_index == si->sup_sw_if_index) { - 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); + 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); } + 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 @@ -584,6 +619,9 @@ 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; @@ -758,9 +796,7 @@ vnet_register_interface (vnet_main_t * vnm, hw->max_rate_bits_per_sec = 0; hw->min_packet_bytes = 0; - hw->per_packet_overhead_bytes = 0; - hw->max_l3_packet_bytes[VLIB_RX] = ~0; - hw->max_l3_packet_bytes[VLIB_TX] = ~0; + hw->max_packet_bytes = 9000; /* default */ if (dev_class->tx_function == 0) goto no_output_nodes; /* No output/tx nodes to create */ |