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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 #include <vnet/lisp-gpe/lisp_gpe_fwd_entry.h>
17 #include <vnet/lisp-gpe/lisp_gpe_adjacency.h>
18 #include <vnet/lisp-gpe/lisp_gpe_tenant.h>
19 #include <vnet/lisp-cp/lisp_cp_dpo.h>
20 #include <vnet/fib/fib_table.h>
21 #include <vnet/fib/fib_entry.h>
22 #include <vnet/fib/fib_path_list.h>
23 #include <vnet/fib/ip6_fib.h>
24 #include <vnet/fib/ip4_fib.h>
25 #include <vnet/dpo/drop_dpo.h>
26 #include <vnet/dpo/lookup_dpo.h>
27 #include <vnet/dpo/load_balance.h>
28 #include <vnet/adj/adj_midchain.h>
31 * @brief Add route to IP4 or IP6 Destination FIB.
33 * Add a route to the destination FIB that results in the lookup
34 * in the SRC FIB. The SRC FIB is created is it does not yet exist.
36 * @param[in] dst_table_id Destination FIB Table-ID
37 * @param[in] dst_prefix Destination IP prefix.
39 * @return src_fib_index The index/ID of the SRC FIB created.
42 ip_dst_fib_add_route (u32 dst_fib_index, const ip_prefix_t * dst_prefix)
44 fib_node_index_t src_fib_index;
45 fib_prefix_t dst_fib_prefix;
46 fib_node_index_t dst_fei;
48 ASSERT (NULL != dst_prefix);
50 ip_prefix_to_fib_prefix (dst_prefix, &dst_fib_prefix);
53 * lookup the destination prefix in the VRF table and retrieve the
54 * LISP associated data
56 dst_fei = fib_table_lookup_exact_match (dst_fib_index, &dst_fib_prefix);
59 * If the FIB entry is not present, or not LISP sourced, add it
61 if (dst_fei == FIB_NODE_INDEX_INVALID ||
62 NULL == fib_entry_get_source_data (dst_fei, FIB_SOURCE_LISP))
64 dpo_id_t src_lkup_dpo = DPO_INVALID;
66 /* create a new src FIB. */
68 fib_table_create_and_lock (dst_fib_prefix.fp_proto,
69 "LISP-src for [%d,%U]",
71 format_fib_prefix, &dst_fib_prefix);
73 * add src fib default route
75 fib_prefix_t prefix = {
76 .fp_proto = dst_fib_prefix.fp_proto,
78 fib_table_entry_special_dpo_add (src_fib_index, &prefix,
80 FIB_ENTRY_FLAG_EXCLUSIVE,
81 lisp_cp_dpo_get (fib_proto_to_dpo
82 (dst_fib_prefix.fp_proto)));
84 * create a data-path object to perform the source address lookup
87 lookup_dpo_add_or_lock_w_fib_index (src_fib_index,
88 (ip_prefix_version (dst_prefix) ==
91 LOOKUP_INPUT_SRC_ADDR,
92 LOOKUP_TABLE_FROM_CONFIG,
96 * add the entry to the destination FIB that uses the lookup DPO
98 dst_fei = fib_table_entry_special_dpo_add (dst_fib_index,
101 FIB_ENTRY_FLAG_EXCLUSIVE,
105 * the DPO is locked by the FIB entry, and we have no further
108 dpo_unlock (&src_lkup_dpo);
111 * save the SRC FIB index on the entry so we can retrieve it for
114 fib_entry_set_source_data (dst_fei, FIB_SOURCE_LISP, &src_fib_index);
119 * destination FIB entry already present
121 src_fib_index = *(u32 *) fib_entry_get_source_data (dst_fei,
125 return (src_fib_index);
129 * @brief Del route to IP4 or IP6 SD FIB.
131 * Remove routes from both destination and source FIBs.
133 * @param[in] src_fib_index The index/ID of the SRC FIB
134 * @param[in] src_prefix Source IP prefix.
135 * @param[in] dst_fib_index The index/ID of the DST FIB
136 * @param[in] dst_prefix Destination IP prefix.
139 ip_src_dst_fib_del_route (u32 src_fib_index,
140 const ip_prefix_t * src_prefix,
141 u32 dst_fib_index, const ip_prefix_t * dst_prefix)
143 fib_prefix_t dst_fib_prefix, src_fib_prefix;
147 ASSERT (NULL != dst_prefix);
148 ASSERT (NULL != src_prefix);
150 ip_prefix_to_fib_prefix (dst_prefix, &dst_fib_prefix);
151 ip_prefix_to_fib_prefix (src_prefix, &src_fib_prefix);
153 fib_table_entry_delete (src_fib_index, &src_fib_prefix, FIB_SOURCE_LISP);
155 /* check if only default left or empty */
156 fib_prefix_t default_pref = {
157 .fp_proto = dst_fib_prefix.fp_proto
160 if (fib_table_lookup_exact_match (src_fib_index,
161 &default_pref) != FIB_NODE_INDEX_INVALID)
164 n_entries = fib_table_get_num_entries (src_fib_index,
165 src_fib_prefix.fp_proto,
167 if (n_entries == 0 || (have_default && n_entries == 1))
170 * remove src FIB default route
173 fib_table_entry_special_remove (src_fib_index, &default_pref,
177 * there's nothing left now, unlock the source FIB and the
180 fib_table_entry_special_remove (dst_fib_index,
181 &dst_fib_prefix, FIB_SOURCE_LISP);
182 fib_table_unlock (src_fib_index, src_fib_prefix.fp_proto);
187 * @brief Add route to IP4 or IP6 SRC FIB.
189 * Adds a route to in the LISP SRC FIB with the result of the route
190 * being the DPO passed.
192 * @param[in] src_fib_index The index/ID of the SRC FIB
193 * @param[in] src_prefix Source IP prefix.
194 * @param[in] src_dpo The DPO the route will link to.
197 ip_src_fib_add_route_w_dpo (u32 src_fib_index,
198 const ip_prefix_t * src_prefix,
199 const dpo_id_t * src_dpo)
201 fib_prefix_t src_fib_prefix;
203 ip_prefix_to_fib_prefix (src_prefix, &src_fib_prefix);
206 * add the entry into the source fib.
208 fib_node_index_t src_fei;
210 src_fei = fib_table_lookup_exact_match (src_fib_index, &src_fib_prefix);
212 if (FIB_NODE_INDEX_INVALID == src_fei ||
213 !fib_entry_is_sourced (src_fei, FIB_SOURCE_LISP))
215 fib_table_entry_special_dpo_add (src_fib_index,
218 FIB_ENTRY_FLAG_EXCLUSIVE, src_dpo);
222 static fib_route_path_t *
223 lisp_gpe_mk_fib_paths (const lisp_fwd_path_t * paths)
225 const lisp_gpe_adjacency_t *ladj;
226 fib_route_path_t *rpaths = NULL;
230 vec_validate (rpaths, vec_len (paths) - 1);
232 best_priority = paths[0].priority;
234 vec_foreach_index (ii, paths)
236 if (paths[0].priority != best_priority)
239 ladj = lisp_gpe_adjacency_get (paths[ii].lisp_adj);
241 ip_address_to_46 (&ladj->remote_rloc,
242 &rpaths[ii].frp_addr, &rpaths[ii].frp_proto);
244 rpaths[ii].frp_sw_if_index = ladj->sw_if_index;
245 rpaths[ii].frp_weight = (paths[ii].weight ? paths[ii].weight : 1);
248 ASSERT (0 != vec_len (rpaths));
254 * @brief Add route to IP4 or IP6 SRC FIB.
256 * Adds a route to in the LISP SRC FIB for the tunnel.
258 * @param[in] src_fib_index The index/ID of the SRC FIB
259 * @param[in] src_prefix Source IP prefix.
260 * @param[in] paths The paths from which to construct the
264 ip_src_fib_add_route (u32 src_fib_index,
265 const ip_prefix_t * src_prefix,
266 const lisp_fwd_path_t * paths)
268 fib_prefix_t src_fib_prefix;
269 fib_route_path_t *rpaths;
271 ip_prefix_to_fib_prefix (src_prefix, &src_fib_prefix);
273 rpaths = lisp_gpe_mk_fib_paths (paths);
275 fib_table_entry_update (src_fib_index,
277 FIB_SOURCE_LISP, FIB_ENTRY_FLAG_NONE, rpaths);
283 create_fib_entries (lisp_gpe_fwd_entry_t * lfe)
287 dproto = (ip_prefix_version (&lfe->key->rmt.ippref) == IP4 ?
288 DPO_PROTO_IP4 : DPO_PROTO_IP6);
292 lfe->src_fib_index = ip_dst_fib_add_route (lfe->eid_fib_index,
293 &lfe->key->rmt.ippref);
294 memcpy (&ippref, &lfe->key->lcl.ippref, sizeof (ippref));
298 lfe->src_fib_index = lfe->eid_fib_index;
299 memcpy (&ippref, &lfe->key->rmt.ippref, sizeof (ippref));
302 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE == lfe->type)
304 dpo_id_t dpo = DPO_INVALID;
309 /* TODO update timers? */
310 case LISP_FORWARD_NATIVE:
311 /* TODO check if route/next-hop for eid exists in fib and add
312 * more specific for the eid with the next-hop found */
313 case LISP_SEND_MAP_REQUEST:
314 /* insert tunnel that always sends map-request */
315 dpo_copy (&dpo, lisp_cp_dpo_get (dproto));
318 /* for drop fwd entries, just add route, no need to add encap tunnel */
319 dpo_copy (&dpo, drop_dpo_get (dproto));
322 ip_src_fib_add_route_w_dpo (lfe->src_fib_index, &ippref, &dpo);
327 ip_src_fib_add_route (lfe->src_fib_index, &ippref, lfe->paths);
332 delete_fib_entries (lisp_gpe_fwd_entry_t * lfe)
334 fib_prefix_t dst_fib_prefix;
337 ip_src_dst_fib_del_route (lfe->src_fib_index,
338 &lfe->key->lcl.ippref,
339 lfe->eid_fib_index, &lfe->key->rmt.ippref);
342 ip_prefix_to_fib_prefix (&lfe->key->rmt.ippref, &dst_fib_prefix);
343 fib_table_entry_delete (lfe->src_fib_index, &dst_fib_prefix,
348 static lisp_gpe_fwd_entry_t *
349 find_fwd_entry (lisp_gpe_main_t * lgm,
350 vnet_lisp_gpe_add_del_fwd_entry_args_t * a,
351 lisp_gpe_fwd_entry_key_t * key)
355 memset (key, 0, sizeof (*key));
357 if (GID_ADDR_IP_PREFIX == gid_address_type (&a->rmt_eid))
360 * the ip version of the source is not set to ip6 when the
361 * source is all zeros. force it.
363 ip_prefix_version (&gid_address_ippref (&a->lcl_eid)) =
364 ip_prefix_version (&gid_address_ippref (&a->rmt_eid));
367 gid_to_dp_address (&a->rmt_eid, &key->rmt);
368 gid_to_dp_address (&a->lcl_eid, &key->lcl);
371 p = hash_get_mem (lgm->lisp_gpe_fwd_entries, key);
375 return (pool_elt_at_index (lgm->lisp_fwd_entry_pool, p[0]));
381 lisp_gpe_fwd_entry_path_sort (void *a1, void *a2)
383 lisp_fwd_path_t *p1 = a1, *p2 = a2;
385 return (p1->priority - p2->priority);
389 lisp_gpe_fwd_entry_mk_paths (lisp_gpe_fwd_entry_t * lfe,
390 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
392 lisp_fwd_path_t *path;
395 vec_validate (lfe->paths, vec_len (a->locator_pairs) - 1);
397 vec_foreach_index (index, a->locator_pairs)
399 path = &lfe->paths[index];
401 path->priority = a->locator_pairs[index].priority;
402 path->weight = a->locator_pairs[index].weight;
405 lisp_gpe_adjacency_find_or_create_and_lock (&a->locator_pairs
407 a->dp_table, lfe->key->vni);
409 vec_sort_with_function (lfe->paths, lisp_gpe_fwd_entry_path_sort);
413 * @brief Add/Delete LISP IP forwarding entry.
415 * creation of forwarding entries for IP LISP overlay:
417 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
418 * @param[in] a Parameters for building the forwarding entry.
420 * @return 0 on success.
423 add_ip_fwd_entry (lisp_gpe_main_t * lgm,
424 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
426 lisp_gpe_fwd_entry_key_t key;
427 lisp_gpe_fwd_entry_t *lfe;
428 fib_protocol_t fproto;
430 lfe = find_fwd_entry (lgm, a, &key);
433 /* don't support updates */
434 return VNET_API_ERROR_INVALID_VALUE;
436 pool_get (lgm->lisp_fwd_entry_pool, lfe);
437 memset (lfe, 0, sizeof (*lfe));
438 lfe->key = clib_mem_alloc (sizeof (key));
439 memcpy (lfe->key, &key, sizeof (key));
441 hash_set_mem (lgm->lisp_gpe_fwd_entries, lfe->key,
442 lfe - lgm->lisp_fwd_entry_pool);
444 fproto = (IP4 == ip_prefix_version (&fid_addr_ippref (&lfe->key->rmt)) ?
445 FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);
447 lfe->type = (a->is_negative ?
448 LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE :
449 LISP_GPE_FWD_ENTRY_TYPE_NORMAL);
450 lfe->tenant = lisp_gpe_tenant_find_or_create (lfe->key->vni);
451 lfe->eid_table_id = a->table_id;
452 lfe->eid_fib_index = fib_table_find_or_create_and_lock (fproto,
454 lfe->is_src_dst = a->is_src_dst;
456 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
458 lisp_gpe_fwd_entry_mk_paths (lfe, a);
461 create_fib_entries (lfe);
466 del_ip_fwd_entry_i (lisp_gpe_main_t * lgm, lisp_gpe_fwd_entry_t * lfe)
468 lisp_fwd_path_t *path;
469 fib_protocol_t fproto;
471 vec_foreach (path, lfe->paths)
473 lisp_gpe_adjacency_unlock (path->lisp_adj);
476 delete_fib_entries (lfe);
478 fproto = (IP4 == ip_prefix_version (&fid_addr_ippref (&lfe->key->rmt)) ?
479 FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);
480 fib_table_unlock (lfe->eid_fib_index, fproto);
482 hash_unset_mem (lgm->lisp_gpe_fwd_entries, lfe->key);
483 clib_mem_free (lfe->key);
484 pool_put (lgm->lisp_fwd_entry_pool, lfe);
488 * @brief Add/Delete LISP IP forwarding entry.
490 * removal of forwarding entries for IP LISP overlay:
492 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
493 * @param[in] a Parameters for building the forwarding entry.
495 * @return 0 on success.
498 del_ip_fwd_entry (lisp_gpe_main_t * lgm,
499 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
501 lisp_gpe_fwd_entry_key_t key;
502 lisp_gpe_fwd_entry_t *lfe;
504 lfe = find_fwd_entry (lgm, a, &key);
508 return VNET_API_ERROR_INVALID_VALUE;
510 del_ip_fwd_entry_i (lgm, lfe);
516 make_mac_fib_key (BVT (clib_bihash_kv) * kv, u16 bd_index, u8 src_mac[6],
519 kv->key[0] = (((u64) bd_index) << 48) | mac_to_u64 (dst_mac);
520 kv->key[1] = mac_to_u64 (src_mac);
525 * @brief Lookup L2 SD FIB entry
527 * Does a vni + dest + source lookup in the L2 LISP FIB. If the lookup fails
528 * it tries a second time with source set to 0 (i.e., a simple dest lookup).
530 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
531 * @param[in] bd_index Bridge domain index.
532 * @param[in] src_mac Source mac address.
533 * @param[in] dst_mac Destination mac address.
535 * @return index of mapping matching the lookup key.
538 lisp_l2_fib_lookup (lisp_gpe_main_t * lgm, u16 bd_index, u8 src_mac[6],
542 BVT (clib_bihash_kv) kv, value;
544 make_mac_fib_key (&kv, bd_index, src_mac, dst_mac);
545 rv = BV (clib_bihash_search_inline_2) (&lgm->l2_fib, &kv, &value);
547 /* no match, try with src 0, catch all for dst */
551 rv = BV (clib_bihash_search_inline_2) (&lgm->l2_fib, &kv, &value);
558 return lisp_gpe_main.l2_lb_cp_lkup.dpoi_index;
562 * @brief Add/del L2 SD FIB entry
564 * Inserts value in L2 FIB keyed by vni + dest + source. If entry is
565 * overwritten the associated value is returned.
567 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
568 * @param[in] bd_index Bridge domain index.
569 * @param[in] src_mac Source mac address.
570 * @param[in] dst_mac Destination mac address.
571 * @param[in] val Value to add.
572 * @param[in] is_add Add/del flag.
574 * @return ~0 or value of overwritten entry.
577 lisp_l2_fib_add_del_entry (u16 bd_index, u8 src_mac[6],
578 u8 dst_mac[6], const dpo_id_t * dpo, u8 is_add)
580 lisp_gpe_main_t *lgm = &lisp_gpe_main;
581 BVT (clib_bihash_kv) kv, value;
584 make_mac_fib_key (&kv, bd_index, src_mac, dst_mac);
586 if (BV (clib_bihash_search) (&lgm->l2_fib, &kv, &value) == 0)
587 old_val = value.value;
590 BV (clib_bihash_add_del) (&lgm->l2_fib, &kv, 0 /* is_add */ );
593 kv.value = dpo->dpoi_index;
594 BV (clib_bihash_add_del) (&lgm->l2_fib, &kv, 1 /* is_add */ );
599 #define L2_FIB_DEFAULT_HASH_NUM_BUCKETS (64 * 1024)
600 #define L2_FIB_DEFAULT_HASH_MEMORY_SIZE (32<<20)
603 l2_fib_init (lisp_gpe_main_t * lgm)
607 BV (clib_bihash_init) (&lgm->l2_fib, "l2 fib",
608 1 << max_log2 (L2_FIB_DEFAULT_HASH_NUM_BUCKETS),
609 L2_FIB_DEFAULT_HASH_MEMORY_SIZE);
612 * the result from a 'miss' in a L2 Table
614 lbi = load_balance_create (1, DPO_PROTO_ETHERNET, 0);
615 load_balance_set_bucket (lbi, 0, lisp_cp_dpo_get (DPO_PROTO_ETHERNET));
617 dpo_set (&lgm->l2_lb_cp_lkup, DPO_LOAD_BALANCE, DPO_PROTO_ETHERNET, lbi);
621 del_l2_fwd_entry_i (lisp_gpe_main_t * lgm, lisp_gpe_fwd_entry_t * lfe)
623 lisp_fwd_path_t *path;
625 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
627 vec_foreach (path, lfe->paths)
629 lisp_gpe_adjacency_unlock (path->lisp_adj);
631 fib_path_list_child_remove (lfe->l2.path_list_index,
632 lfe->l2.child_index);
635 lisp_l2_fib_add_del_entry (lfe->l2.eid_bd_index,
636 fid_addr_mac (&lfe->key->lcl),
637 fid_addr_mac (&lfe->key->rmt), NULL, 0);
639 hash_unset_mem (lgm->lisp_gpe_fwd_entries, lfe->key);
640 clib_mem_free (lfe->key);
641 pool_put (lgm->lisp_fwd_entry_pool, lfe);
645 * @brief Delete LISP L2 forwarding entry.
647 * Coordinates the removal of forwarding entries for L2 LISP overlay:
649 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
650 * @param[in] a Parameters for building the forwarding entry.
652 * @return 0 on success.
655 del_l2_fwd_entry (lisp_gpe_main_t * lgm,
656 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
658 lisp_gpe_fwd_entry_key_t key;
659 lisp_gpe_fwd_entry_t *lfe;
661 lfe = find_fwd_entry (lgm, a, &key);
664 return VNET_API_ERROR_INVALID_VALUE;
666 del_l2_fwd_entry_i (lgm, lfe);
672 * @brief Construct and insert the forwarding information used by an L2 entry
675 lisp_gpe_l2_update_fwding (lisp_gpe_fwd_entry_t * lfe)
677 lisp_gpe_main_t *lgm = &lisp_gpe_main;
678 dpo_id_t dpo = DPO_INVALID;
680 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
682 fib_path_list_contribute_forwarding (lfe->l2.path_list_index,
683 FIB_FORW_CHAIN_TYPE_ETHERNET,
685 dpo_copy (&dpo, &lfe->l2.dpo);
691 case SEND_MAP_REQUEST:
692 dpo_copy (&dpo, &lgm->l2_lb_cp_lkup);
697 dpo_copy (&dpo, drop_dpo_get (DPO_PROTO_ETHERNET));
701 /* add entry to l2 lisp fib */
702 lisp_l2_fib_add_del_entry (lfe->l2.eid_bd_index,
703 fid_addr_mac (&lfe->key->lcl),
704 fid_addr_mac (&lfe->key->rmt), &dpo, 1);
710 * @brief Add LISP L2 forwarding entry.
712 * Coordinates the creation of forwarding entries for L2 LISP overlay:
713 * creates lisp-gpe tunnel and injects new entry in Source/Dest L2 FIB.
715 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
716 * @param[in] a Parameters for building the forwarding entry.
718 * @return 0 on success.
721 add_l2_fwd_entry (lisp_gpe_main_t * lgm,
722 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
724 lisp_gpe_fwd_entry_key_t key;
725 bd_main_t *bdm = &bd_main;
726 lisp_gpe_fwd_entry_t *lfe;
729 bd_indexp = hash_get (bdm->bd_index_by_bd_id, a->bd_id);
732 clib_warning ("bridge domain %d doesn't exist", a->bd_id);
736 lfe = find_fwd_entry (lgm, a, &key);
739 /* don't support updates */
740 return VNET_API_ERROR_INVALID_VALUE;
742 pool_get (lgm->lisp_fwd_entry_pool, lfe);
743 memset (lfe, 0, sizeof (*lfe));
744 lfe->key = clib_mem_alloc (sizeof (key));
745 memcpy (lfe->key, &key, sizeof (key));
747 hash_set_mem (lgm->lisp_gpe_fwd_entries, lfe->key,
748 lfe - lgm->lisp_fwd_entry_pool);
750 lfe->type = (a->is_negative ?
751 LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE :
752 LISP_GPE_FWD_ENTRY_TYPE_NORMAL);
753 lfe->l2.eid_bd_id = a->bd_id;
754 lfe->l2.eid_bd_index = bd_indexp[0];
755 lfe->tenant = lisp_gpe_tenant_find_or_create (lfe->key->vni);
757 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
759 fib_route_path_t *rpaths;
762 * Make the sorted array of LISP paths with their resp. adjacency
764 lisp_gpe_fwd_entry_mk_paths (lfe, a);
767 * From the LISP paths, construct a FIB path list that will
768 * contribute a load-balance.
770 rpaths = lisp_gpe_mk_fib_paths (lfe->paths);
772 lfe->l2.path_list_index =
773 fib_path_list_create (FIB_PATH_LIST_FLAG_NONE, rpaths);
776 * become a child of the path-list so we receive updates when
777 * its forwarding state changes. this includes an implicit lock.
779 lfe->l2.child_index =
780 fib_path_list_child_add (lfe->l2.path_list_index,
781 FIB_NODE_TYPE_LISP_GPE_FWD_ENTRY,
782 lfe - lgm->lisp_fwd_entry_pool);
786 lfe->action = a->action;
789 lisp_gpe_l2_update_fwding (lfe);
795 * @brief Lookup NSH SD FIB entry
797 * Does an SPI+SI lookup in the NSH LISP FIB.
799 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
800 * @param[in] spi_si SPI + SI.
802 * @return next node index.
805 lisp_nsh_fib_lookup (lisp_gpe_main_t * lgm, u32 spi_si_net_order)
808 BVT (clib_bihash_kv) kv, value;
810 memset (&kv, 0, sizeof (kv));
811 kv.key[0] = spi_si_net_order;
812 rv = BV (clib_bihash_search_inline_2) (&lgm->nsh_fib, &kv, &value);
816 return lgm->nsh_cp_lkup;
820 lisp_gpe_fwd_entry_t *lfe;
821 lfe = pool_elt_at_index (lgm->lisp_fwd_entry_pool, value.value);
822 return &lfe->nsh.choice;
827 * @brief Add/del NSH FIB entry
829 * Inserts value in NSH FIB keyed by SPI+SI. If entry is
830 * overwritten the associated value is returned.
832 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
833 * @param[in] spi_si SPI + SI.
834 * @param[in] dpo Load balanced mapped to SPI + SI
836 * @return ~0 or value of overwritten entry.
839 lisp_nsh_fib_add_del_entry (u32 spi_si_host_order, u32 lfei, u8 is_add)
841 lisp_gpe_main_t *lgm = &lisp_gpe_main;
842 BVT (clib_bihash_kv) kv, value;
845 memset (&kv, 0, sizeof (kv));
846 kv.key[0] = clib_host_to_net_u32 (spi_si_host_order);
849 if (BV (clib_bihash_search) (&lgm->nsh_fib, &kv, &value) == 0)
850 old_val = value.value;
853 BV (clib_bihash_add_del) (&lgm->nsh_fib, &kv, 0 /* is_add */ );
857 BV (clib_bihash_add_del) (&lgm->nsh_fib, &kv, 1 /* is_add */ );
862 #define NSH_FIB_DEFAULT_HASH_NUM_BUCKETS (64 * 1024)
863 #define NSH_FIB_DEFAULT_HASH_MEMORY_SIZE (32<<20)
866 nsh_fib_init (lisp_gpe_main_t * lgm)
868 BV (clib_bihash_init) (&lgm->nsh_fib, "nsh fib",
869 1 << max_log2 (NSH_FIB_DEFAULT_HASH_NUM_BUCKETS),
870 NSH_FIB_DEFAULT_HASH_MEMORY_SIZE);
873 * the result from a 'miss' in a NSH Table
875 lgm->nsh_cp_lkup = lisp_cp_dpo_get (DPO_PROTO_NSH);
879 del_nsh_fwd_entry_i (lisp_gpe_main_t * lgm, lisp_gpe_fwd_entry_t * lfe)
881 lisp_fwd_path_t *path;
883 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
885 vec_foreach (path, lfe->paths)
887 lisp_gpe_adjacency_unlock (path->lisp_adj);
889 fib_path_list_child_remove (lfe->nsh.path_list_index,
890 lfe->nsh.child_index);
891 dpo_reset (&lfe->nsh.choice);
894 lisp_nsh_fib_add_del_entry (fid_addr_nsh (&lfe->key->rmt), (u32) ~ 0, 0);
896 hash_unset_mem (lgm->lisp_gpe_fwd_entries, lfe->key);
897 clib_mem_free (lfe->key);
898 pool_put (lgm->lisp_fwd_entry_pool, lfe);
902 * @brief Delete LISP NSH forwarding entry.
904 * Coordinates the removal of forwarding entries for NSH LISP overlay:
906 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
907 * @param[in] a Parameters for building the forwarding entry.
909 * @return 0 on success.
912 del_nsh_fwd_entry (lisp_gpe_main_t * lgm,
913 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
915 lisp_gpe_fwd_entry_key_t key;
916 lisp_gpe_fwd_entry_t *lfe;
918 lfe = find_fwd_entry (lgm, a, &key);
921 return VNET_API_ERROR_INVALID_VALUE;
923 del_nsh_fwd_entry_i (lgm, lfe);
929 * @brief Construct and insert the forwarding information used by an NSH entry
932 lisp_gpe_nsh_update_fwding (lisp_gpe_fwd_entry_t * lfe)
934 lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
935 dpo_id_t dpo = DPO_INVALID;
936 vnet_hw_interface_t *hi;
939 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
941 fib_path_list_contribute_forwarding (lfe->nsh.path_list_index,
942 FIB_FORW_CHAIN_TYPE_NSH,
946 * LISP encap is always the same for this SPI+SI so we do that hash now
947 * and stack on the choice.
949 if (DPO_LOAD_BALANCE == lfe->nsh.dpo.dpoi_type)
952 const load_balance_t *lb;
955 lb = load_balance_get (lfe->nsh.dpo.dpoi_index);
956 hash = fid_addr_nsh (&lfe->key->rmt) % lb->lb_n_buckets;
958 load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1);
960 dpo_copy (&dpo, tmp);
967 case SEND_MAP_REQUEST:
968 dpo_copy (&dpo, lgm->nsh_cp_lkup);
973 dpo_copy (&dpo, drop_dpo_get (DPO_PROTO_NSH));
977 /* We have only one nsh-lisp interface (no NSH virtualization) */
978 hip = hash_get (lgm->nsh_ifaces.hw_if_index_by_dp_table, 0);
981 hi = vnet_get_hw_interface (lgm->vnet_main, hip[0]);
982 dpo_stack_from_node (hi->tx_node_index, &lfe->nsh.choice, &dpo);
984 /* add entry to nsh lisp fib */
985 lisp_nsh_fib_add_del_entry (fid_addr_nsh (&lfe->key->rmt),
986 lfe - lgm->lisp_fwd_entry_pool, 1);
992 * @brief Add LISP NSH forwarding entry.
994 * Coordinates the creation of forwarding entries for L2 LISP overlay:
995 * creates lisp-gpe tunnel and injects new entry in Source/Dest L2 FIB.
997 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
998 * @param[in] a Parameters for building the forwarding entry.
1000 * @return 0 on success.
1003 add_nsh_fwd_entry (lisp_gpe_main_t * lgm,
1004 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
1006 lisp_gpe_fwd_entry_key_t key;
1007 lisp_gpe_fwd_entry_t *lfe;
1009 lfe = find_fwd_entry (lgm, a, &key);
1012 /* don't support updates */
1013 return VNET_API_ERROR_INVALID_VALUE;
1015 pool_get (lgm->lisp_fwd_entry_pool, lfe);
1016 memset (lfe, 0, sizeof (*lfe));
1017 lfe->key = clib_mem_alloc (sizeof (key));
1018 memcpy (lfe->key, &key, sizeof (key));
1020 hash_set_mem (lgm->lisp_gpe_fwd_entries, lfe->key,
1021 lfe - lgm->lisp_fwd_entry_pool);
1023 lfe->type = (a->is_negative ?
1024 LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE :
1025 LISP_GPE_FWD_ENTRY_TYPE_NORMAL);
1028 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
1030 fib_route_path_t *rpaths;
1033 * Make the sorted array of LISP paths with their resp. adjacency
1035 lisp_gpe_fwd_entry_mk_paths (lfe, a);
1038 * From the LISP paths, construct a FIB path list that will
1039 * contribute a load-balance.
1041 rpaths = lisp_gpe_mk_fib_paths (lfe->paths);
1043 lfe->nsh.path_list_index =
1044 fib_path_list_create (FIB_PATH_LIST_FLAG_NONE, rpaths);
1047 * become a child of the path-list so we receive updates when
1048 * its forwarding state changes. this includes an implicit lock.
1050 lfe->nsh.child_index =
1051 fib_path_list_child_add (lfe->nsh.path_list_index,
1052 FIB_NODE_TYPE_LISP_GPE_FWD_ENTRY,
1053 lfe - lgm->lisp_fwd_entry_pool);
1057 lfe->action = a->action;
1060 lisp_gpe_nsh_update_fwding (lfe);
1066 * @brief conver from the embedded fib_node_t struct to the LSIP entry
1068 static lisp_gpe_fwd_entry_t *
1069 lisp_gpe_fwd_entry_from_fib_node (fib_node_t * node)
1071 return ((lisp_gpe_fwd_entry_t *) (((char *) node) -
1072 STRUCT_OFFSET_OF (lisp_gpe_fwd_entry_t,
1077 * @brief Function invoked during a backwalk of the FIB graph
1079 static fib_node_back_walk_rc_t
1080 lisp_gpe_fib_node_back_walk (fib_node_t * node,
1081 fib_node_back_walk_ctx_t * ctx)
1083 lisp_gpe_fwd_entry_t *lfe = lisp_gpe_fwd_entry_from_fib_node (node);
1085 if (fid_addr_type (&lfe->key->rmt) == FID_ADDR_MAC)
1086 lisp_gpe_l2_update_fwding (lfe);
1087 else if (fid_addr_type (&lfe->key->rmt) == FID_ADDR_NSH)
1088 lisp_gpe_nsh_update_fwding (lfe);
1090 return (FIB_NODE_BACK_WALK_CONTINUE);
1094 * @brief Get a fib_node_t struct from the index of a LISP fwd entry
1097 lisp_gpe_fwd_entry_get_fib_node (fib_node_index_t index)
1099 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1100 lisp_gpe_fwd_entry_t *lfe;
1102 lfe = pool_elt_at_index (lgm->lisp_fwd_entry_pool, index);
1104 return (&(lfe->node));
1108 * @brief An indication from the graph that the last lock has gone
1111 lisp_gpe_fwd_entry_fib_node_last_lock_gone (fib_node_t * node)
1113 /* We don't manage the locks of the LISP objects via the graph, since
1114 * this object has no children. so this is a no-op. */
1118 * @brief Virtual function table to register with FIB for the LISP type
1120 const static fib_node_vft_t lisp_fwd_vft = {
1121 .fnv_get = lisp_gpe_fwd_entry_get_fib_node,
1122 .fnv_last_lock = lisp_gpe_fwd_entry_fib_node_last_lock_gone,
1123 .fnv_back_walk = lisp_gpe_fib_node_back_walk,
1127 * @brief Forwarding entry create/remove dispatcher.
1129 * Calls l2 or l3 forwarding entry add/del function based on input data.
1131 * @param[in] a Forwarding entry parameters.
1132 * @param[out] hw_if_indexp NOT USED
1134 * @return 0 on success.
1137 vnet_lisp_gpe_add_del_fwd_entry (vnet_lisp_gpe_add_del_fwd_entry_args_t * a,
1140 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1143 if (vnet_lisp_gpe_enable_disable_status () == 0)
1145 clib_warning ("LISP is disabled!");
1146 return VNET_API_ERROR_LISP_DISABLED;
1149 type = gid_address_type (&a->rmt_eid);
1152 case GID_ADDR_IP_PREFIX:
1154 return add_ip_fwd_entry (lgm, a);
1156 return del_ip_fwd_entry (lgm, a);
1160 return add_l2_fwd_entry (lgm, a);
1162 return del_l2_fwd_entry (lgm, a);
1165 return add_nsh_fwd_entry (lgm, a);
1167 return del_nsh_fwd_entry (lgm, a);
1169 clib_warning ("Forwarding entries for type %d not supported!", type);
1175 vnet_lisp_flush_stats (void)
1177 lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
1181 pool_foreach (stat, lgm->lisp_stats_pool,
1183 stat->pkt_count = 0;
1190 lisp_del_adj_stats (lisp_gpe_main_t * lgm, u32 fwd_entry_index, u32 ti)
1193 lisp_stats_key_t key;
1198 memset (&key, 0, sizeof (key));
1199 key.fwd_entry_index = fwd_entry_index;
1200 key.tunnel_index = ti;
1202 p = hash_get_mem (lgm->lisp_stats_index_by_key, &key);
1205 s = pool_elt_at_index (lgm->lisp_stats_pool, p[0]);
1206 hp = hash_get_pair (lgm->lisp_stats_index_by_key, &key);
1207 key_copy = (void *) (hp->key);
1208 hash_unset_mem (lgm->lisp_stats_index_by_key, &key);
1209 clib_mem_free (key_copy);
1210 pool_put (lgm->lisp_stats_pool, s);
1215 vnet_lisp_del_fwd_stats (vnet_lisp_gpe_add_del_fwd_entry_args_t * a,
1216 u32 fwd_entry_index)
1218 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1219 lisp_gpe_fwd_entry_key_t fe_key;
1220 lisp_gpe_fwd_entry_t *lfe;
1221 lisp_fwd_path_t *path;
1222 const lisp_gpe_adjacency_t *ladj;
1224 lfe = find_fwd_entry (lgm, a, &fe_key);
1228 if (LISP_GPE_FWD_ENTRY_TYPE_NORMAL != lfe->type)
1231 vec_foreach (path, lfe->paths)
1233 ladj = lisp_gpe_adjacency_get (path->lisp_adj);
1234 lisp_del_adj_stats (lgm, fwd_entry_index, ladj->tunnel_index);
1239 * @brief Flush all the forwrding entries
1242 vnet_lisp_gpe_fwd_entry_flush (void)
1244 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1245 lisp_gpe_fwd_entry_t *lfe;
1248 pool_foreach (lfe, lgm->lisp_fwd_entry_pool,
1250 switch (fid_addr_type(&lfe->key->rmt))
1253 del_l2_fwd_entry_i (lgm, lfe);
1255 case FID_ADDR_IP_PREF:
1256 del_ip_fwd_entry_i (lgm, lfe);
1259 del_nsh_fwd_entry_i (lgm, lfe);
1267 format_lisp_fwd_path (u8 * s, va_list ap)
1269 lisp_fwd_path_t *lfp = va_arg (ap, lisp_fwd_path_t *);
1271 s = format (s, "weight:%d ", lfp->weight);
1272 s = format (s, "adj:[%U]\n",
1273 format_lisp_gpe_adjacency,
1274 lisp_gpe_adjacency_get (lfp->lisp_adj),
1275 LISP_GPE_ADJ_FORMAT_FLAG_NONE);
1280 typedef enum lisp_gpe_fwd_entry_format_flag_t_
1282 LISP_GPE_FWD_ENTRY_FORMAT_NONE = (0 << 0),
1283 LISP_GPE_FWD_ENTRY_FORMAT_DETAIL = (1 << 1),
1284 } lisp_gpe_fwd_entry_format_flag_t;
1288 format_lisp_gpe_fwd_entry (u8 * s, va_list ap)
1290 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1291 lisp_gpe_fwd_entry_t *lfe = va_arg (ap, lisp_gpe_fwd_entry_t *);
1292 lisp_gpe_fwd_entry_format_flag_t flags =
1293 va_arg (ap, lisp_gpe_fwd_entry_format_flag_t);
1295 s = format (s, "VNI:%d VRF:%d EID: %U -> %U [index:%d]",
1296 lfe->key->vni, lfe->eid_table_id,
1297 format_fid_address, &lfe->key->lcl,
1298 format_fid_address, &lfe->key->rmt,
1299 lfe - lgm->lisp_fwd_entry_pool);
1301 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE == lfe->type)
1303 s = format (s, "\n Negative - action:%U",
1304 format_negative_mapping_action, lfe->action);
1308 lisp_fwd_path_t *path;
1310 s = format (s, "\n via:");
1311 vec_foreach (path, lfe->paths)
1313 s = format (s, "\n %U", format_lisp_fwd_path, path);
1317 if (flags & LISP_GPE_FWD_ENTRY_FORMAT_DETAIL)
1319 switch (fid_addr_type (&lfe->key->rmt))
1322 s = format (s, " fib-path-list:%d\n", lfe->l2.path_list_index);
1323 s = format (s, " dpo:%U\n", format_dpo_id, &lfe->l2.dpo, 0);
1326 s = format (s, " fib-path-list:%d\n", lfe->nsh.path_list_index);
1327 s = format (s, " dpo:%U\n", format_dpo_id, &lfe->nsh.dpo, 0);
1329 case FID_ADDR_IP_PREF:
1337 static clib_error_t *
1338 lisp_gpe_fwd_entry_show (vlib_main_t * vm,
1339 unformat_input_t * input, vlib_cli_command_t * cmd)
1341 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1342 lisp_gpe_fwd_entry_t *lfe;
1346 if (unformat (input, "vni %d", &vni))
1348 else if (unformat (input, "%d", &index))
1350 if (!pool_is_free_index (lgm->lisp_fwd_entry_pool, index))
1352 lfe = pool_elt_at_index (lgm->lisp_fwd_entry_pool, index);
1354 vlib_cli_output (vm, "[%d@] %U",
1356 format_lisp_gpe_fwd_entry, lfe,
1357 LISP_GPE_FWD_ENTRY_FORMAT_DETAIL);
1361 vlib_cli_output (vm, "entry %d invalid", index);
1368 pool_foreach (lfe, lgm->lisp_fwd_entry_pool,
1371 (lfe->key->vni == vni))
1372 vlib_cli_output (vm, "%U", format_lisp_gpe_fwd_entry, lfe,
1373 LISP_GPE_FWD_ENTRY_FORMAT_NONE);
1381 VLIB_CLI_COMMAND (lisp_gpe_fwd_entry_show_command, static) = {
1382 .path = "show gpe entry",
1383 .short_help = "show gpe entry vni <vni> vrf <vrf> [leid <leid>] reid <reid>",
1384 .function = lisp_gpe_fwd_entry_show,
1389 lisp_gpe_fwd_entry_init (vlib_main_t * vm)
1391 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1392 clib_error_t *error = NULL;
1394 if ((error = vlib_call_init_function (vm, lisp_cp_dpo_module_init)))
1400 fib_node_register_type (FIB_NODE_TYPE_LISP_GPE_FWD_ENTRY, &lisp_fwd_vft);
1405 lisp_api_gpe_fwd_entry_t *
1406 vnet_lisp_gpe_fwd_entries_get_by_vni (u32 vni)
1408 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1409 lisp_gpe_fwd_entry_t *lfe;
1410 lisp_api_gpe_fwd_entry_t *entries = 0, e;
1413 pool_foreach (lfe, lgm->lisp_fwd_entry_pool,
1415 if (lfe->key->vni == vni)
1417 memset (&e, 0, sizeof (e));
1418 e.dp_table = lfe->eid_table_id;
1419 e.vni = lfe->key->vni;
1420 e.fwd_entry_index = lfe - lgm->lisp_fwd_entry_pool;
1421 memcpy (&e.reid, &lfe->key->rmt, sizeof (e.reid));
1422 memcpy (&e.leid, &lfe->key->lcl, sizeof (e.leid));
1423 vec_add1 (entries, e);
1431 VLIB_INIT_FUNCTION (lisp_gpe_fwd_entry_init);
1434 * fd.io coding-style-patch-verification: ON
1437 * eval: (c-set-style "gnu")