ethernet: configure system default ethernet MTU

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

diff --git a/src/vnet/ethernet/interface.c b/src/vnet/ethernet/interface.c
index 7b2b162..3b9093c 100644 (file)
--- a/src/vnet/ethernet/interface.c
+++ b/src/vnet/ethernet/interface.c
@@ -41,10 +41,12 @@
 #include <vnet/ip/ip.h>
 #include <vnet/pg/pg.h>
 #include <vnet/ethernet/ethernet.h>
-#include <vnet/ethernet/arp.h>
+//#include <vnet/ethernet/arp.h>
 #include <vnet/l2/l2_input.h>
 #include <vnet/l2/l2_bd.h>
 #include <vnet/adj/adj.h>
+#include <vnet/adj/adj_mcast.h>
+#include <vnet/ip-neighbor/ip_neighbor.h>
 
 /**
  * @file
@@ -53,7 +55,7 @@
  * This file contains code to manage loopback interfaces.
  */
 
-const u8 *
+static const u8 *
 ethernet_ip4_mcast_dst_addr (void)
 {
   const static u8 ethernet_mcast_dst_mac[] = {
@@ -63,7 +65,7 @@ ethernet_ip4_mcast_dst_addr (void)
   return (ethernet_mcast_dst_mac);
 }
 
-const u8 *
+static const u8 *
 ethernet_ip6_mcast_dst_addr (void)
 {
   const static u8 ethernet_mcast_dst_mac[] = {
@@ -195,27 +197,74 @@ ethernet_build_rewrite (vnet_main_t * vnm,
 void
 ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
 {
-  ip_adjacency_t *adj;
-
-  adj = adj_get (ai);
-
   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
+
   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
     {
       default_update_adjacency (vnm, sw_if_index, ai);
     }
-  else if (FIB_PROTOCOL_IP4 == adj->ia_nh_proto)
-    {
-      arp_update_adjacency (vnm, sw_if_index, ai);
-    }
-  else if (FIB_PROTOCOL_IP6 == adj->ia_nh_proto)
-    {
-      ip6_ethernet_update_adjacency (vnm, sw_if_index, ai);
-    }
   else
     {
-      ASSERT (0);
+      ip_adjacency_t *adj;
+
+      adj = adj_get (ai);
+
+      switch (adj->lookup_next_index)
+       {
+       case IP_LOOKUP_NEXT_GLEAN:
+         adj_glean_update_rewrite (ai);
+         break;
+       case IP_LOOKUP_NEXT_ARP:
+         ip_neighbor_update (vnm, ai);
+         break;
+       case IP_LOOKUP_NEXT_BCAST:
+         adj_nbr_update_rewrite (ai,
+                                 ADJ_NBR_REWRITE_FLAG_COMPLETE,
+                                 ethernet_build_rewrite
+                                 (vnm,
+                                  adj->rewrite_header.sw_if_index,
+                                  adj->ia_link,
+                                  VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
+         break;
+       case IP_LOOKUP_NEXT_MCAST:
+         {
+           /*
+            * Construct a partial rewrite from the known ethernet mcast dest MAC
+            */
+           u8 *rewrite;
+           u8 offset;
+
+           rewrite = ethernet_build_rewrite
+             (vnm,
+              sw_if_index,
+              adj->ia_link,
+              (adj->ia_nh_proto == FIB_PROTOCOL_IP6 ?
+               ethernet_ip6_mcast_dst_addr () :
+               ethernet_ip4_mcast_dst_addr ()));
+
+           /*
+            * Complete the remaining fields of the adj's rewrite to direct the
+            * complete of the rewrite at switch time by copying in the IP
+            * dst address's bytes.
+            * Ofset is 2 bytes into the destintation address.
+            */
+           offset = vec_len (rewrite) - 2;
+           adj_mcast_update_rewrite (ai, rewrite, offset);
+
+           break;
+         }
+       case IP_LOOKUP_NEXT_DROP:
+       case IP_LOOKUP_NEXT_PUNT:
+       case IP_LOOKUP_NEXT_LOCAL:
+       case IP_LOOKUP_NEXT_REWRITE:
+       case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
+       case IP_LOOKUP_NEXT_MIDCHAIN:
+       case IP_LOOKUP_NEXT_ICMP_ERROR:
+       case IP_LOOKUP_N_NEXT:
+         ASSERT (0);
+         break;
+       }
     }
 }
 
@@ -234,8 +283,12 @@ ethernet_mac_change (vnet_hw_interface_t * hi,
   clib_memcpy (hi->hw_address, mac_address, vec_len (hi->hw_address));
 
   clib_memcpy (ei->address, (u8 *) mac_address, sizeof (ei->address));
-  ethernet_arp_change_mac (hi->sw_if_index);
-  ethernet_ndp_change_mac (hi->sw_if_index);
+
+  {
+    ethernet_address_change_ctx_t *cb;
+    vec_foreach (cb, em->address_change_callbacks)
+      cb->function (em, hi->sw_if_index, cb->function_opaque);
+  }
 
   return (NULL);
 }
@@ -306,11 +359,12 @@ ethernet_register_interface (vnet_main_t * vnm,
   hi->max_packet_bytes = hi->max_supported_packet_bytes =
     ETHERNET_MAX_PACKET_BYTES;
 
-  /* Standard default ethernet MTU. */
-  vnet_sw_interface_set_mtu (vnm, hi->sw_if_index, 9000);
+  /* Default ethernet MTU, 9000 unless set by ethernet_config see below */
+  vnet_sw_interface_set_mtu (vnm, hi->sw_if_index, em->default_mtu);
 
   clib_memcpy (ei->address, address, sizeof (ei->address));
   vec_add (hi->hw_address, address, sizeof (ei->address));
+  CLIB_MEM_UNPOISON (hi->hw_address, 8);
 
   if (error)
     {
@@ -1138,6 +1192,29 @@ VLIB_CLI_COMMAND (delete_sub_interface_command, static) = {
 };
 /* *INDENT-ON* */
 
+static clib_error_t *
+ethernet_config (vlib_main_t * vm, unformat_input_t * input)
+{
+  ethernet_main_t *em = &ethernet_main;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "default-mtu %u", &em->default_mtu))
+       {
+         if (em->default_mtu < 64 || em->default_mtu > 9000)
+           return clib_error_return (0, "default MTU must be >=64, <=9000");
+       }
+      else
+       {
+         return clib_error_return (0, "unknown input '%U'",
+                                   format_unformat_error, input);
+       }
+    }
+  return 0;
+}
+
+VLIB_CONFIG_FUNCTION (ethernet_config, "ethernet");
+
 /*
  * fd.io coding-style-patch-verification: ON
  *