Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2016 Cisco and/or its affiliates.
       3             :  * Licensed under the Apache License, Version 2.0 (the "License");
       4             :  * you may not use this file except in compliance with the License.
       5             :  * You may obtain a copy of the License at:
       6             :  *
       7             :  *     http://www.apache.org/licenses/LICENSE-2.0
       8             :  *
       9             :  * Unless required by applicable law or agreed to in writing, software
      10             :  * distributed under the License is distributed on an "AS IS" BASIS,
      11             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             :  * See the License for the specific language governing permissions and
      13             :  * limitations under the License.
      14             :  */
      15             : /**
      16             :  * @file
      17             :  * @brief LISP sub-interfaces.
      18             :  *
      19             :  */
      20             : #include <lisp/lisp-gpe/lisp_gpe_tenant.h>
      21             : #include <lisp/lisp-gpe/lisp_gpe_sub_interface.h>
      22             : #include <vnet/fib/fib_table.h>
      23             : #include <vnet/interface.h>
      24             : 
      25             : /**
      26             :  * @brief Pool of all l3-sub-interfaces
      27             :  */
      28             : static lisp_gpe_sub_interface_t *lisp_gpe_sub_interface_pool;
      29             : 
      30             : /**
      31             :  * A DB of all LISP L3 sub-interfaces. The key is:{VNI,l-RLOC}
      32             :  */
      33             : static uword *lisp_gpe_sub_interfaces;
      34             : 
      35             : /**
      36             :  * A DB of all VNET L3 sub-interfaces. The key is:{VNI,l-RLOC}
      37             :  * Used in the data-plane for interface lookup on decap.
      38             :  */
      39             : uword *lisp_gpe_sub_interfaces_sw_if_index;
      40             : 
      41             : /**
      42             :  * The next available sub-interface ID. FIXME
      43             :  */
      44             : static u32 lisp_gpe_sub_interface_id;
      45             : 
      46             : 
      47             : static index_t
      48           1 : lisp_gpe_sub_interface_db_find (const ip_address_t * lrloc, u32 vni)
      49             : {
      50             :   uword *p;
      51             : 
      52             :   lisp_gpe_sub_interface_key_t key;
      53             : 
      54           1 :   clib_memset (&key, 0, sizeof (key));
      55           1 :   ip_address_copy (&key.local_rloc, lrloc);
      56           1 :   key.vni = vni;
      57           1 :   p = hash_get_mem (lisp_gpe_sub_interfaces, &key);
      58             : 
      59           1 :   if (NULL == p)
      60           1 :     return (INDEX_INVALID);
      61             :   else
      62           0 :     return (p[0]);
      63             : }
      64             : 
      65             : static void
      66           1 : lisp_gpe_sub_interface_db_insert (const lisp_gpe_sub_interface_t * l3s)
      67             : {
      68           2 :   hash_set_mem (lisp_gpe_sub_interfaces,
      69             :                 l3s->key, l3s - lisp_gpe_sub_interface_pool);
      70           2 :   hash_set_mem (lisp_gpe_sub_interfaces_sw_if_index,
      71             :                 l3s->key, l3s->sw_if_index);
      72           1 : }
      73             : 
      74             : static void
      75           1 : lisp_gpe_sub_interface_db_remove (const lisp_gpe_sub_interface_t * l3s)
      76             : {
      77           2 :   hash_unset_mem (lisp_gpe_sub_interfaces, l3s->key);
      78           2 :   hash_unset_mem (lisp_gpe_sub_interfaces_sw_if_index, l3s->key);
      79           1 : }
      80             : 
      81             : lisp_gpe_sub_interface_t *
      82           2 : lisp_gpe_sub_interface_get_i (index_t l3si)
      83             : {
      84           2 :   return (pool_elt_at_index (lisp_gpe_sub_interface_pool, l3si));
      85             : }
      86             : 
      87             : static void
      88           1 : lisp_gpe_sub_interface_set_table (u32 sw_if_index, u32 table_id)
      89             : {
      90             :   fib_node_index_t fib_index;
      91             : 
      92           1 :   fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, table_id,
      93             :                                                  FIB_SOURCE_LISP);
      94           1 :   ASSERT (FIB_NODE_INDEX_INVALID != fib_index);
      95             : 
      96           1 :   ip4_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
      97             : 
      98           1 :   fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, table_id,
      99             :                                                  FIB_SOURCE_LISP);
     100           1 :   ASSERT (FIB_NODE_INDEX_INVALID != fib_index);
     101             : 
     102           1 :   ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
     103           1 : }
     104             : 
     105             : static void
     106           1 : lisp_gpe_sub_interface_unset_table (u32 sw_if_index, u32 table_id)
     107             : {
     108           1 :   fib_table_unlock (ip4_main.fib_index_by_sw_if_index[sw_if_index],
     109             :                     FIB_PROTOCOL_IP4, FIB_SOURCE_LISP);
     110           1 :   ip4_main.fib_index_by_sw_if_index[sw_if_index] = 0;
     111           1 :   ip4_sw_interface_enable_disable (sw_if_index, 0);
     112             : 
     113           1 :   fib_table_unlock (ip6_main.fib_index_by_sw_if_index[sw_if_index],
     114             :                     FIB_PROTOCOL_IP6, FIB_SOURCE_LISP);
     115           1 :   ip6_main.fib_index_by_sw_if_index[sw_if_index] = 0;
     116           1 :   ip6_sw_interface_enable_disable (sw_if_index, 0);
     117           1 : }
     118             : 
     119             : index_t
     120           1 : lisp_gpe_sub_interface_find_or_create_and_lock (const ip_address_t * lrloc,
     121             :                                                 u32 overlay_table_id, u32 vni)
     122             : {
     123             :   lisp_gpe_sub_interface_t *l3s;
     124             :   index_t l3si;
     125             : 
     126           1 :   l3si = lisp_gpe_sub_interface_db_find (lrloc, vni);
     127             : 
     128           1 :   if (INDEX_INVALID == l3si)
     129             :     {
     130             :       u32 main_sw_if_index, sub_sw_if_index;
     131             : 
     132             :       /*
     133             :        * find the main interface from the VNI
     134             :        */
     135             :       main_sw_if_index =
     136           1 :         lisp_gpe_tenant_l3_iface_add_or_lock (vni, overlay_table_id,
     137             :                                               1 /* with_default_route */ );
     138             : 
     139           1 :       vnet_sw_interface_t sub_itf_template = {
     140             :         .type = VNET_SW_INTERFACE_TYPE_SUB,
     141             :         .flood_class = VNET_FLOOD_CLASS_NORMAL,
     142             :         .sup_sw_if_index = main_sw_if_index,
     143           1 :         .sub.id = lisp_gpe_sub_interface_id++,
     144             :       };
     145             : 
     146           1 :       if (NULL != vnet_create_sw_interface (vnet_get_main (),
     147             :                                             &sub_itf_template,
     148             :                                             &sub_sw_if_index))
     149           0 :         return (INDEX_INVALID);
     150             : 
     151           1 :       pool_get (lisp_gpe_sub_interface_pool, l3s);
     152           1 :       clib_memset (l3s, 0, sizeof (*l3s));
     153           1 :       l3s->key = clib_mem_alloc (sizeof (*l3s->key));
     154           1 :       clib_memset (l3s->key, 0, sizeof (*l3s->key));
     155             : 
     156           1 :       ip_address_copy (&l3s->key->local_rloc, lrloc);
     157           1 :       l3s->key->vni = vni;
     158           1 :       l3s->main_sw_if_index = main_sw_if_index;
     159           1 :       l3s->sw_if_index = sub_sw_if_index;
     160           1 :       l3s->eid_table_id = overlay_table_id;
     161             : 
     162           1 :       l3si = (l3s - lisp_gpe_sub_interface_pool);
     163             : 
     164             :       // FIXME. enable When we get an adj
     165           1 :       ip6_sw_interface_enable_disable (l3s->sw_if_index, 1);
     166           1 :       ip4_sw_interface_enable_disable (l3s->sw_if_index, 1);
     167             : 
     168           1 :       vnet_sw_interface_set_flags (vnet_get_main (),
     169           1 :                                    l3s->sw_if_index,
     170             :                                    VNET_SW_INTERFACE_FLAG_ADMIN_UP);
     171           1 :       vnet_set_interface_l3_output_node (vlib_get_main (), l3s->sw_if_index,
     172             :                                          (u8 *) "lisp-tunnel-output");
     173             : 
     174           1 :       lisp_gpe_sub_interface_db_insert (l3s);
     175             :     }
     176             :   else
     177             :     {
     178           0 :       l3s = lisp_gpe_sub_interface_get_i (l3si);
     179           0 :       l3s->eid_table_id = overlay_table_id;
     180             :     }
     181             : 
     182           1 :   lisp_gpe_sub_interface_set_table (l3s->sw_if_index, l3s->eid_table_id);
     183           1 :   l3s->locks++;
     184             : 
     185           1 :   return (l3si);
     186             : }
     187             : 
     188             : void
     189           1 : lisp_gpe_sub_interface_unlock (index_t l3si)
     190             : {
     191             :   lisp_gpe_sub_interface_t *l3s;
     192             : 
     193           1 :   l3s = lisp_gpe_sub_interface_get_i (l3si);
     194             : 
     195           1 :   ASSERT (0 != l3s->locks);
     196           1 :   l3s->locks--;
     197             : 
     198           1 :   if (0 == l3s->locks)
     199             :     {
     200           1 :       lisp_gpe_sub_interface_unset_table (l3s->sw_if_index,
     201             :                                           l3s->eid_table_id);
     202             : 
     203           1 :       lisp_gpe_tenant_l3_iface_unlock (l3s->key->vni);
     204           1 :       vnet_sw_interface_set_flags (vnet_get_main (), l3s->sw_if_index, 0);
     205           1 :       vnet_reset_interface_l3_output_node (vlib_get_main (), l3s->sw_if_index);
     206           1 :       vnet_delete_sub_interface (l3s->sw_if_index);
     207             : 
     208           1 :       lisp_gpe_sub_interface_db_remove (l3s);
     209             : 
     210           1 :       clib_mem_free (l3s->key);
     211           1 :       pool_put (lisp_gpe_sub_interface_pool, l3s);
     212             :     }
     213           1 : }
     214             : 
     215             : const lisp_gpe_sub_interface_t *
     216           1 : lisp_gpe_sub_interface_get (index_t l3si)
     217             : {
     218           1 :   return (lisp_gpe_sub_interface_get_i (l3si));
     219             : }
     220             : 
     221             : u8 *
     222           0 : format_lisp_gpe_sub_interface (u8 * s, va_list * ap)
     223             : {
     224           0 :   lisp_gpe_sub_interface_t *l3s = va_arg (*ap, lisp_gpe_sub_interface_t *);
     225           0 :   vnet_main_t *vnm = vnet_get_main ();
     226             : 
     227           0 :   s = format (s, "%-16U",
     228             :               format_vnet_sw_interface_name,
     229             :               vnm, vnet_get_sw_interface (vnm, l3s->sw_if_index));
     230           0 :   s = format (s, "%=8d", l3s->key->vni);
     231           0 :   s = format (s, "%=15d", l3s->sw_if_index);
     232           0 :   s = format (s, "%U", format_ip_address, &l3s->key->local_rloc);
     233             : 
     234           0 :   return (s);
     235             : }
     236             : 
     237             : /** CLI command to show LISP-GPE interfaces. */
     238             : static clib_error_t *
     239           0 : lisp_gpe_sub_interface_show (vlib_main_t * vm,
     240             :                              unformat_input_t * input,
     241             :                              vlib_cli_command_t * cmd)
     242             : {
     243             :   lisp_gpe_sub_interface_t *l3s;
     244             : 
     245           0 :   vlib_cli_output (vm, "%-16s%=8s%=15s%s", "Name", "VNI", "sw_if_index",
     246             :                    "local RLOC");
     247             : 
     248             :   /* *INDENT-OFF* */
     249           0 :   pool_foreach (l3s, lisp_gpe_sub_interface_pool)
     250             :    {
     251           0 :     vlib_cli_output (vm, "%U", format_lisp_gpe_sub_interface, l3s);
     252             :   }
     253             :   /* *INDENT-ON* */
     254             : 
     255           0 :   return 0;
     256             : }
     257             : 
     258             : /* *INDENT-OFF* */
     259      116069 : VLIB_CLI_COMMAND (lisp_gpe_sub_interface_command) = {
     260             :   .path = "show gpe sub-interface",
     261             :   .short_help = "show gpe sub-interface",
     262             :   .function = lisp_gpe_sub_interface_show,
     263             : };
     264             : /* *INDENT-ON* */
     265             : 
     266             : static clib_error_t *
     267         559 : lisp_gpe_sub_interface_module_init (vlib_main_t * vm)
     268             : {
     269         559 :   lisp_gpe_sub_interfaces =
     270         559 :     hash_create_mem (0,
     271             :                      sizeof (lisp_gpe_sub_interface_key_t), sizeof (uword));
     272         559 :   lisp_gpe_sub_interfaces_sw_if_index =
     273         559 :     hash_create_mem (0,
     274             :                      sizeof (lisp_gpe_sub_interface_key_t), sizeof (uword));
     275             : 
     276         559 :   return (NULL);
     277             : }
     278             : 
     279        2239 : VLIB_INIT_FUNCTION (lisp_gpe_sub_interface_module_init);
     280             : 
     281             : /*
     282             :  * fd.io coding-style-patch-verification: ON
     283             :  *
     284             :  * Local Variables:
     285             :  * eval: (c-set-style "gnu")
     286             :  * End:
     287             :  */