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) ==
92 LOOKUP_INPUT_SRC_ADDR,
93 LOOKUP_TABLE_FROM_CONFIG,
97 * add the entry to the destination FIB that uses the lookup DPO
99 dst_fei = fib_table_entry_special_dpo_add (dst_fib_index,
102 FIB_ENTRY_FLAG_EXCLUSIVE,
106 * the DPO is locked by the FIB entry, and we have no further
109 dpo_unlock (&src_lkup_dpo);
112 * save the SRC FIB index on the entry so we can retrieve it for
115 fib_entry_set_source_data (dst_fei, FIB_SOURCE_LISP, &src_fib_index);
120 * destination FIB entry already present
122 src_fib_index = *(u32 *) fib_entry_get_source_data (dst_fei,
126 return (src_fib_index);
130 * @brief Del route to IP4 or IP6 SD FIB.
132 * Remove routes from both destination and source FIBs.
134 * @param[in] src_fib_index The index/ID of the SRC FIB
135 * @param[in] src_prefix Source IP prefix.
136 * @param[in] dst_fib_index The index/ID of the DST FIB
137 * @param[in] dst_prefix Destination IP prefix.
140 ip_src_dst_fib_del_route (u32 src_fib_index,
141 const ip_prefix_t * src_prefix,
142 u32 dst_fib_index, const ip_prefix_t * dst_prefix)
144 fib_prefix_t dst_fib_prefix, src_fib_prefix;
148 ASSERT (NULL != dst_prefix);
149 ASSERT (NULL != src_prefix);
151 ip_prefix_to_fib_prefix (dst_prefix, &dst_fib_prefix);
152 ip_prefix_to_fib_prefix (src_prefix, &src_fib_prefix);
154 fib_table_entry_delete (src_fib_index, &src_fib_prefix, FIB_SOURCE_LISP);
156 /* check if only default left or empty */
157 fib_prefix_t default_pref = {
158 .fp_proto = dst_fib_prefix.fp_proto
161 if (fib_table_lookup_exact_match (src_fib_index,
162 &default_pref) != FIB_NODE_INDEX_INVALID)
165 n_entries = fib_table_get_num_entries (src_fib_index,
166 src_fib_prefix.fp_proto,
168 if (n_entries == 0 || (have_default && n_entries == 1))
171 * remove src FIB default route
174 fib_table_entry_special_remove (src_fib_index, &default_pref,
178 * there's nothing left now, unlock the source FIB and the
181 fib_table_entry_special_remove (dst_fib_index,
182 &dst_fib_prefix, FIB_SOURCE_LISP);
183 fib_table_unlock (src_fib_index, src_fib_prefix.fp_proto);
188 * @brief Add route to IP4 or IP6 SRC FIB.
190 * Adds a route to in the LISP SRC FIB with the result of the route
191 * being the DPO passed.
193 * @param[in] src_fib_index The index/ID of the SRC FIB
194 * @param[in] src_prefix Source IP prefix.
195 * @param[in] src_dpo The DPO the route will link to.
198 ip_src_fib_add_route_w_dpo (u32 src_fib_index,
199 const ip_prefix_t * src_prefix,
200 const dpo_id_t * src_dpo)
202 fib_prefix_t src_fib_prefix;
204 ip_prefix_to_fib_prefix (src_prefix, &src_fib_prefix);
207 * add the entry into the source fib.
209 fib_node_index_t src_fei;
211 src_fei = fib_table_lookup_exact_match (src_fib_index, &src_fib_prefix);
213 if (FIB_NODE_INDEX_INVALID == src_fei ||
214 !fib_entry_is_sourced (src_fei, FIB_SOURCE_LISP))
216 fib_table_entry_special_dpo_add (src_fib_index,
219 FIB_ENTRY_FLAG_EXCLUSIVE, src_dpo);
223 static fib_route_path_t *
224 lisp_gpe_mk_fib_paths (const lisp_fwd_path_t * paths)
226 const lisp_gpe_adjacency_t *ladj;
227 fib_route_path_t *rpaths = NULL;
231 vec_validate (rpaths, vec_len (paths) - 1);
233 best_priority = paths[0].priority;
235 vec_foreach_index (ii, paths)
237 if (paths[0].priority != best_priority)
240 ladj = lisp_gpe_adjacency_get (paths[ii].lisp_adj);
242 ip_address_to_46 (&ladj->remote_rloc,
243 &rpaths[ii].frp_addr, &rpaths[ii].frp_proto);
245 rpaths[ii].frp_sw_if_index = ladj->sw_if_index;
246 rpaths[ii].frp_weight = (paths[ii].weight ? paths[ii].weight : 1);
249 ASSERT (0 != vec_len (rpaths));
255 * @brief Add route to IP4 or IP6 SRC FIB.
257 * Adds a route to in the LISP SRC FIB for the tunnel.
259 * @param[in] src_fib_index The index/ID of the SRC FIB
260 * @param[in] src_prefix Source IP prefix.
261 * @param[in] paths The paths from which to construct the
265 ip_src_fib_add_route (u32 src_fib_index,
266 const ip_prefix_t * src_prefix,
267 const lisp_fwd_path_t * paths)
269 fib_prefix_t src_fib_prefix;
270 fib_route_path_t *rpaths;
272 ip_prefix_to_fib_prefix (src_prefix, &src_fib_prefix);
274 rpaths = lisp_gpe_mk_fib_paths (paths);
276 fib_table_entry_update (src_fib_index,
278 FIB_SOURCE_LISP, FIB_ENTRY_FLAG_NONE, rpaths);
284 create_fib_entries (lisp_gpe_fwd_entry_t * lfe)
288 dproto = (ip_prefix_version (&lfe->key->rmt.ippref) == IP4 ?
289 DPO_PROTO_IP4 : DPO_PROTO_IP6);
293 lfe->src_fib_index = ip_dst_fib_add_route (lfe->eid_fib_index,
294 &lfe->key->rmt.ippref);
295 memcpy (&ippref, &lfe->key->lcl.ippref, sizeof (ippref));
299 lfe->src_fib_index = lfe->eid_fib_index;
300 memcpy (&ippref, &lfe->key->rmt.ippref, sizeof (ippref));
303 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE == lfe->type)
305 dpo_id_t dpo = DPO_INVALID;
310 /* TODO update timers? */
311 case LISP_FORWARD_NATIVE:
312 /* TODO check if route/next-hop for eid exists in fib and add
313 * more specific for the eid with the next-hop found */
314 case LISP_SEND_MAP_REQUEST:
315 /* insert tunnel that always sends map-request */
316 dpo_copy (&dpo, lisp_cp_dpo_get (dproto));
319 /* for drop fwd entries, just add route, no need to add encap tunnel */
320 dpo_copy (&dpo, drop_dpo_get (dproto));
323 ip_src_fib_add_route_w_dpo (lfe->src_fib_index, &ippref, &dpo);
328 ip_src_fib_add_route (lfe->src_fib_index, &ippref, lfe->paths);
333 delete_fib_entries (lisp_gpe_fwd_entry_t * lfe)
335 fib_prefix_t dst_fib_prefix;
338 ip_src_dst_fib_del_route (lfe->src_fib_index,
339 &lfe->key->lcl.ippref,
340 lfe->eid_fib_index, &lfe->key->rmt.ippref);
343 ip_prefix_to_fib_prefix (&lfe->key->rmt.ippref, &dst_fib_prefix);
344 fib_table_entry_delete (lfe->src_fib_index, &dst_fib_prefix,
349 static lisp_gpe_fwd_entry_t *
350 find_fwd_entry (lisp_gpe_main_t * lgm,
351 vnet_lisp_gpe_add_del_fwd_entry_args_t * a,
352 lisp_gpe_fwd_entry_key_t * key)
356 memset (key, 0, sizeof (*key));
358 if (GID_ADDR_IP_PREFIX == gid_address_type (&a->rmt_eid))
361 * the ip version of the source is not set to ip6 when the
362 * source is all zeros. force it.
364 ip_prefix_version (&gid_address_ippref (&a->lcl_eid)) =
365 ip_prefix_version (&gid_address_ippref (&a->rmt_eid));
368 gid_to_dp_address (&a->rmt_eid, &key->rmt);
369 gid_to_dp_address (&a->lcl_eid, &key->lcl);
372 p = hash_get_mem (lgm->lisp_gpe_fwd_entries, key);
376 return (pool_elt_at_index (lgm->lisp_fwd_entry_pool, p[0]));
382 lisp_gpe_fwd_entry_path_sort (void *a1, void *a2)
384 lisp_fwd_path_t *p1 = a1, *p2 = a2;
386 return (p1->priority - p2->priority);
390 lisp_gpe_fwd_entry_mk_paths (lisp_gpe_fwd_entry_t * lfe,
391 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
393 lisp_fwd_path_t *path;
396 vec_validate (lfe->paths, vec_len (a->locator_pairs) - 1);
398 vec_foreach_index (index, a->locator_pairs)
400 path = &lfe->paths[index];
402 path->priority = a->locator_pairs[index].priority;
403 path->weight = a->locator_pairs[index].weight;
406 lisp_gpe_adjacency_find_or_create_and_lock (&a->locator_pairs
408 a->dp_table, lfe->key->vni);
410 vec_sort_with_function (lfe->paths, lisp_gpe_fwd_entry_path_sort);
414 vnet_lisp_gpe_add_fwd_counters (vnet_lisp_gpe_add_del_fwd_entry_args_t * a,
417 const lisp_gpe_adjacency_t *ladj;
418 lisp_fwd_path_t *path;
419 lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
421 lisp_gpe_fwd_entry_t *lfe;
422 lisp_gpe_fwd_entry_key_t fe_key;
423 lisp_stats_key_t key;
425 lfe = find_fwd_entry (lgm, a, &fe_key);
430 if (LISP_GPE_FWD_ENTRY_TYPE_NORMAL != lfe->type)
433 memset (&key, 0, sizeof (key));
434 key.fwd_entry_index = fwd_entry_index;
436 vec_foreach (path, lfe->paths)
438 ladj = lisp_gpe_adjacency_get (path->lisp_adj);
439 key.tunnel_index = ladj->tunnel_index;
440 lisp_stats_key_t *key_copy = clib_mem_alloc (sizeof (*key_copy));
441 memcpy (key_copy, &key, sizeof (*key_copy));
442 pool_get (lgm->dummy_stats_pool, dummy_elt);
443 hash_set_mem (lgm->lisp_stats_index_by_key, key_copy,
444 dummy_elt - lgm->dummy_stats_pool);
446 vlib_validate_combined_counter (&lgm->counters,
447 dummy_elt - lgm->dummy_stats_pool);
448 vlib_zero_combined_counter (&lgm->counters,
449 dummy_elt - lgm->dummy_stats_pool);
454 * @brief Add/Delete LISP IP forwarding entry.
456 * creation of forwarding entries for IP LISP overlay:
458 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
459 * @param[in] a Parameters for building the forwarding entry.
461 * @return 0 on success.
464 add_ip_fwd_entry (lisp_gpe_main_t * lgm,
465 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
467 lisp_gpe_fwd_entry_key_t key;
468 lisp_gpe_fwd_entry_t *lfe;
469 fib_protocol_t fproto;
471 lfe = find_fwd_entry (lgm, a, &key);
474 /* don't support updates */
475 return VNET_API_ERROR_INVALID_VALUE;
477 pool_get (lgm->lisp_fwd_entry_pool, lfe);
478 memset (lfe, 0, sizeof (*lfe));
479 lfe->key = clib_mem_alloc (sizeof (key));
480 memcpy (lfe->key, &key, sizeof (key));
482 hash_set_mem (lgm->lisp_gpe_fwd_entries, lfe->key,
483 lfe - lgm->lisp_fwd_entry_pool);
484 a->fwd_entry_index = lfe - lgm->lisp_fwd_entry_pool;
486 fproto = (IP4 == ip_prefix_version (&fid_addr_ippref (&lfe->key->rmt)) ?
487 FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);
489 lfe->type = (a->is_negative ?
490 LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE :
491 LISP_GPE_FWD_ENTRY_TYPE_NORMAL);
492 lfe->tenant = lisp_gpe_tenant_find_or_create (lfe->key->vni);
493 lfe->eid_table_id = a->table_id;
494 lfe->eid_fib_index = fib_table_find_or_create_and_lock (fproto,
496 lfe->is_src_dst = a->is_src_dst;
498 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
500 lisp_gpe_fwd_entry_mk_paths (lfe, a);
504 lfe->action = a->action;
507 create_fib_entries (lfe);
512 del_ip_fwd_entry_i (lisp_gpe_main_t * lgm, lisp_gpe_fwd_entry_t * lfe)
514 lisp_fwd_path_t *path;
515 fib_protocol_t fproto;
517 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
519 vec_foreach (path, lfe->paths)
521 lisp_gpe_adjacency_unlock (path->lisp_adj);
525 delete_fib_entries (lfe);
527 fproto = (IP4 == ip_prefix_version (&fid_addr_ippref (&lfe->key->rmt)) ?
528 FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);
529 fib_table_unlock (lfe->eid_fib_index, fproto);
531 hash_unset_mem (lgm->lisp_gpe_fwd_entries, lfe->key);
532 clib_mem_free (lfe->key);
533 pool_put (lgm->lisp_fwd_entry_pool, lfe);
537 * @brief Add/Delete LISP IP forwarding entry.
539 * removal of forwarding entries for IP LISP overlay:
541 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
542 * @param[in] a Parameters for building the forwarding entry.
544 * @return 0 on success.
547 del_ip_fwd_entry (lisp_gpe_main_t * lgm,
548 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
550 lisp_gpe_fwd_entry_key_t key;
551 lisp_gpe_fwd_entry_t *lfe;
553 lfe = find_fwd_entry (lgm, a, &key);
557 return VNET_API_ERROR_INVALID_VALUE;
559 del_ip_fwd_entry_i (lgm, lfe);
565 make_mac_fib_key (BVT (clib_bihash_kv) * kv, u16 bd_index, u8 src_mac[6],
568 kv->key[0] = (((u64) bd_index) << 48) | mac_to_u64 (dst_mac);
569 kv->key[1] = mac_to_u64 (src_mac);
574 * @brief Lookup L2 SD FIB entry
576 * Does a vni + dest + source lookup in the L2 LISP FIB. If the lookup fails
577 * it tries a second time with source set to 0 (i.e., a simple dest lookup).
579 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
580 * @param[in] bd_index Bridge domain index.
581 * @param[in] src_mac Source mac address.
582 * @param[in] dst_mac Destination mac address.
584 * @return index of mapping matching the lookup key.
587 lisp_l2_fib_lookup (lisp_gpe_main_t * lgm, u16 bd_index, u8 src_mac[6],
591 BVT (clib_bihash_kv) kv, value;
593 make_mac_fib_key (&kv, bd_index, src_mac, dst_mac);
594 rv = BV (clib_bihash_search_inline_2) (&lgm->l2_fib, &kv, &value);
596 /* no match, try with src 0, catch all for dst */
600 rv = BV (clib_bihash_search_inline_2) (&lgm->l2_fib, &kv, &value);
607 return lisp_gpe_main.l2_lb_cp_lkup.dpoi_index;
611 * @brief Add/del L2 SD FIB entry
613 * Inserts value in L2 FIB keyed by vni + dest + source. If entry is
614 * overwritten the associated value is returned.
616 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
617 * @param[in] bd_index Bridge domain index.
618 * @param[in] src_mac Source mac address.
619 * @param[in] dst_mac Destination mac address.
620 * @param[in] val Value to add.
621 * @param[in] is_add Add/del flag.
623 * @return ~0 or value of overwritten entry.
626 lisp_l2_fib_add_del_entry (u16 bd_index, u8 src_mac[6],
627 u8 dst_mac[6], const dpo_id_t * dpo, u8 is_add)
629 lisp_gpe_main_t *lgm = &lisp_gpe_main;
630 BVT (clib_bihash_kv) kv, value;
633 make_mac_fib_key (&kv, bd_index, src_mac, dst_mac);
635 if (BV (clib_bihash_search) (&lgm->l2_fib, &kv, &value) == 0)
636 old_val = value.value;
639 BV (clib_bihash_add_del) (&lgm->l2_fib, &kv, 0 /* is_add */ );
642 kv.value = dpo->dpoi_index;
643 BV (clib_bihash_add_del) (&lgm->l2_fib, &kv, 1 /* is_add */ );
648 #define L2_FIB_DEFAULT_HASH_NUM_BUCKETS (64 * 1024)
649 #define L2_FIB_DEFAULT_HASH_MEMORY_SIZE (32<<20)
652 l2_fib_init (lisp_gpe_main_t * lgm)
656 BV (clib_bihash_init) (&lgm->l2_fib, "l2 fib",
657 1 << max_log2 (L2_FIB_DEFAULT_HASH_NUM_BUCKETS),
658 L2_FIB_DEFAULT_HASH_MEMORY_SIZE);
661 * the result from a 'miss' in a L2 Table
663 lbi = load_balance_create (1, DPO_PROTO_ETHERNET, 0);
664 load_balance_set_bucket (lbi, 0, lisp_cp_dpo_get (DPO_PROTO_ETHERNET));
666 dpo_set (&lgm->l2_lb_cp_lkup, DPO_LOAD_BALANCE, DPO_PROTO_ETHERNET, lbi);
670 del_l2_fwd_entry_i (lisp_gpe_main_t * lgm, lisp_gpe_fwd_entry_t * lfe)
672 lisp_fwd_path_t *path;
674 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
676 vec_foreach (path, lfe->paths)
678 lisp_gpe_adjacency_unlock (path->lisp_adj);
680 fib_path_list_child_remove (lfe->l2.path_list_index,
681 lfe->l2.child_index);
684 lisp_l2_fib_add_del_entry (lfe->l2.eid_bd_index,
685 fid_addr_mac (&lfe->key->lcl),
686 fid_addr_mac (&lfe->key->rmt), NULL, 0);
688 hash_unset_mem (lgm->lisp_gpe_fwd_entries, lfe->key);
689 clib_mem_free (lfe->key);
690 pool_put (lgm->lisp_fwd_entry_pool, lfe);
694 * @brief Delete LISP L2 forwarding entry.
696 * Coordinates the removal of forwarding entries for L2 LISP overlay:
698 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
699 * @param[in] a Parameters for building the forwarding entry.
701 * @return 0 on success.
704 del_l2_fwd_entry (lisp_gpe_main_t * lgm,
705 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
707 lisp_gpe_fwd_entry_key_t key;
708 lisp_gpe_fwd_entry_t *lfe;
710 lfe = find_fwd_entry (lgm, a, &key);
713 return VNET_API_ERROR_INVALID_VALUE;
715 del_l2_fwd_entry_i (lgm, lfe);
721 * @brief Construct and insert the forwarding information used by an L2 entry
724 lisp_gpe_l2_update_fwding (lisp_gpe_fwd_entry_t * lfe)
726 lisp_gpe_main_t *lgm = &lisp_gpe_main;
727 dpo_id_t dpo = DPO_INVALID;
729 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
731 fib_path_list_contribute_forwarding (lfe->l2.path_list_index,
732 FIB_FORW_CHAIN_TYPE_ETHERNET,
734 dpo_copy (&dpo, &lfe->l2.dpo);
740 case SEND_MAP_REQUEST:
741 dpo_copy (&dpo, &lgm->l2_lb_cp_lkup);
746 dpo_copy (&dpo, drop_dpo_get (DPO_PROTO_ETHERNET));
750 /* add entry to l2 lisp fib */
751 lisp_l2_fib_add_del_entry (lfe->l2.eid_bd_index,
752 fid_addr_mac (&lfe->key->lcl),
753 fid_addr_mac (&lfe->key->rmt), &dpo, 1);
759 * @brief Add LISP L2 forwarding entry.
761 * Coordinates the creation of forwarding entries for L2 LISP overlay:
762 * creates lisp-gpe tunnel and injects new entry in Source/Dest L2 FIB.
764 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
765 * @param[in] a Parameters for building the forwarding entry.
767 * @return 0 on success.
770 add_l2_fwd_entry (lisp_gpe_main_t * lgm,
771 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
773 lisp_gpe_fwd_entry_key_t key;
774 bd_main_t *bdm = &bd_main;
775 lisp_gpe_fwd_entry_t *lfe;
778 bd_indexp = hash_get (bdm->bd_index_by_bd_id, a->bd_id);
781 clib_warning ("bridge domain %d doesn't exist", a->bd_id);
785 lfe = find_fwd_entry (lgm, a, &key);
788 /* don't support updates */
789 return VNET_API_ERROR_INVALID_VALUE;
791 pool_get (lgm->lisp_fwd_entry_pool, lfe);
792 memset (lfe, 0, sizeof (*lfe));
793 lfe->key = clib_mem_alloc (sizeof (key));
794 memcpy (lfe->key, &key, sizeof (key));
796 hash_set_mem (lgm->lisp_gpe_fwd_entries, lfe->key,
797 lfe - lgm->lisp_fwd_entry_pool);
798 a->fwd_entry_index = lfe - lgm->lisp_fwd_entry_pool;
800 lfe->type = (a->is_negative ?
801 LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE :
802 LISP_GPE_FWD_ENTRY_TYPE_NORMAL);
803 lfe->l2.eid_bd_id = a->bd_id;
804 lfe->l2.eid_bd_index = bd_indexp[0];
805 lfe->tenant = lisp_gpe_tenant_find_or_create (lfe->key->vni);
807 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
809 fib_route_path_t *rpaths;
812 * Make the sorted array of LISP paths with their resp. adjacency
814 lisp_gpe_fwd_entry_mk_paths (lfe, a);
817 * From the LISP paths, construct a FIB path list that will
818 * contribute a load-balance.
820 rpaths = lisp_gpe_mk_fib_paths (lfe->paths);
822 lfe->l2.path_list_index =
823 fib_path_list_create (FIB_PATH_LIST_FLAG_NONE, rpaths);
826 * become a child of the path-list so we receive updates when
827 * its forwarding state changes. this includes an implicit lock.
829 lfe->l2.child_index =
830 fib_path_list_child_add (lfe->l2.path_list_index,
831 FIB_NODE_TYPE_LISP_GPE_FWD_ENTRY,
832 lfe - lgm->lisp_fwd_entry_pool);
836 lfe->action = a->action;
839 lisp_gpe_l2_update_fwding (lfe);
845 * @brief Lookup NSH SD FIB entry
847 * Does an SPI+SI lookup in the NSH LISP FIB.
849 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
850 * @param[in] spi_si SPI + SI.
852 * @return next node index.
855 lisp_nsh_fib_lookup (lisp_gpe_main_t * lgm, u32 spi_si_net_order)
858 BVT (clib_bihash_kv) kv, value;
860 memset (&kv, 0, sizeof (kv));
861 kv.key[0] = spi_si_net_order;
862 rv = BV (clib_bihash_search_inline_2) (&lgm->nsh_fib, &kv, &value);
866 return lgm->nsh_cp_lkup;
870 lisp_gpe_fwd_entry_t *lfe;
871 lfe = pool_elt_at_index (lgm->lisp_fwd_entry_pool, value.value);
872 return &lfe->nsh.choice;
877 * @brief Add/del NSH FIB entry
879 * Inserts value in NSH FIB keyed by SPI+SI. If entry is
880 * overwritten the associated value is returned.
882 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
883 * @param[in] spi_si SPI + SI.
884 * @param[in] dpo Load balanced mapped to SPI + SI
886 * @return ~0 or value of overwritten entry.
889 lisp_nsh_fib_add_del_entry (u32 spi_si_host_order, u32 lfei, u8 is_add)
891 lisp_gpe_main_t *lgm = &lisp_gpe_main;
892 BVT (clib_bihash_kv) kv, value;
895 memset (&kv, 0, sizeof (kv));
896 kv.key[0] = clib_host_to_net_u32 (spi_si_host_order);
899 if (BV (clib_bihash_search) (&lgm->nsh_fib, &kv, &value) == 0)
900 old_val = value.value;
903 BV (clib_bihash_add_del) (&lgm->nsh_fib, &kv, 0 /* is_add */ );
907 BV (clib_bihash_add_del) (&lgm->nsh_fib, &kv, 1 /* is_add */ );
912 #define NSH_FIB_DEFAULT_HASH_NUM_BUCKETS (64 * 1024)
913 #define NSH_FIB_DEFAULT_HASH_MEMORY_SIZE (32<<20)
916 nsh_fib_init (lisp_gpe_main_t * lgm)
918 BV (clib_bihash_init) (&lgm->nsh_fib, "nsh fib",
919 1 << max_log2 (NSH_FIB_DEFAULT_HASH_NUM_BUCKETS),
920 NSH_FIB_DEFAULT_HASH_MEMORY_SIZE);
923 * the result from a 'miss' in a NSH Table
925 lgm->nsh_cp_lkup = lisp_cp_dpo_get (DPO_PROTO_NSH);
929 del_nsh_fwd_entry_i (lisp_gpe_main_t * lgm, lisp_gpe_fwd_entry_t * lfe)
931 lisp_fwd_path_t *path;
933 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
935 vec_foreach (path, lfe->paths)
937 lisp_gpe_adjacency_unlock (path->lisp_adj);
939 fib_path_list_child_remove (lfe->nsh.path_list_index,
940 lfe->nsh.child_index);
941 dpo_reset (&lfe->nsh.choice);
944 lisp_nsh_fib_add_del_entry (fid_addr_nsh (&lfe->key->rmt), (u32) ~ 0, 0);
946 hash_unset_mem (lgm->lisp_gpe_fwd_entries, lfe->key);
947 clib_mem_free (lfe->key);
948 pool_put (lgm->lisp_fwd_entry_pool, lfe);
952 * @brief Delete LISP NSH forwarding entry.
954 * Coordinates the removal of forwarding entries for NSH LISP overlay:
956 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
957 * @param[in] a Parameters for building the forwarding entry.
959 * @return 0 on success.
962 del_nsh_fwd_entry (lisp_gpe_main_t * lgm,
963 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
965 lisp_gpe_fwd_entry_key_t key;
966 lisp_gpe_fwd_entry_t *lfe;
968 lfe = find_fwd_entry (lgm, a, &key);
971 return VNET_API_ERROR_INVALID_VALUE;
973 del_nsh_fwd_entry_i (lgm, lfe);
979 * @brief Construct and insert the forwarding information used by an NSH entry
982 lisp_gpe_nsh_update_fwding (lisp_gpe_fwd_entry_t * lfe)
984 lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
985 dpo_id_t dpo = DPO_INVALID;
986 vnet_hw_interface_t *hi;
989 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
991 fib_path_list_contribute_forwarding (lfe->nsh.path_list_index,
992 FIB_FORW_CHAIN_TYPE_NSH,
996 * LISP encap is always the same for this SPI+SI so we do that hash now
997 * and stack on the choice.
999 if (DPO_LOAD_BALANCE == lfe->nsh.dpo.dpoi_type)
1001 const dpo_id_t *tmp;
1002 const load_balance_t *lb;
1005 lb = load_balance_get (lfe->nsh.dpo.dpoi_index);
1006 hash = fid_addr_nsh (&lfe->key->rmt) % lb->lb_n_buckets;
1008 load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1);
1010 dpo_copy (&dpo, tmp);
1015 switch (lfe->action)
1017 case SEND_MAP_REQUEST:
1018 dpo_copy (&dpo, lgm->nsh_cp_lkup);
1021 case FORWARD_NATIVE:
1023 dpo_copy (&dpo, drop_dpo_get (DPO_PROTO_NSH));
1027 /* We have only one nsh-lisp interface (no NSH virtualization) */
1028 hip = hash_get (lgm->nsh_ifaces.hw_if_index_by_dp_table, 0);
1031 hi = vnet_get_hw_interface (lgm->vnet_main, hip[0]);
1032 dpo_stack_from_node (hi->tx_node_index, &lfe->nsh.choice, &dpo);
1034 /* add entry to nsh lisp fib */
1035 lisp_nsh_fib_add_del_entry (fid_addr_nsh (&lfe->key->rmt),
1036 lfe - lgm->lisp_fwd_entry_pool, 1);
1042 * @brief Add LISP NSH forwarding entry.
1044 * Coordinates the creation of forwarding entries for L2 LISP overlay:
1045 * creates lisp-gpe tunnel and injects new entry in Source/Dest L2 FIB.
1047 * @param[in] lgm Reference to @ref lisp_gpe_main_t.
1048 * @param[in] a Parameters for building the forwarding entry.
1050 * @return 0 on success.
1053 add_nsh_fwd_entry (lisp_gpe_main_t * lgm,
1054 vnet_lisp_gpe_add_del_fwd_entry_args_t * a)
1056 lisp_gpe_fwd_entry_key_t key;
1057 lisp_gpe_fwd_entry_t *lfe;
1059 lfe = find_fwd_entry (lgm, a, &key);
1062 /* don't support updates */
1063 return VNET_API_ERROR_INVALID_VALUE;
1065 pool_get (lgm->lisp_fwd_entry_pool, lfe);
1066 memset (lfe, 0, sizeof (*lfe));
1067 lfe->key = clib_mem_alloc (sizeof (key));
1068 memcpy (lfe->key, &key, sizeof (key));
1070 hash_set_mem (lgm->lisp_gpe_fwd_entries, lfe->key,
1071 lfe - lgm->lisp_fwd_entry_pool);
1072 a->fwd_entry_index = lfe - lgm->lisp_fwd_entry_pool;
1074 lfe->type = (a->is_negative ?
1075 LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE :
1076 LISP_GPE_FWD_ENTRY_TYPE_NORMAL);
1079 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE != lfe->type)
1081 fib_route_path_t *rpaths;
1084 * Make the sorted array of LISP paths with their resp. adjacency
1086 lisp_gpe_fwd_entry_mk_paths (lfe, a);
1089 * From the LISP paths, construct a FIB path list that will
1090 * contribute a load-balance.
1092 rpaths = lisp_gpe_mk_fib_paths (lfe->paths);
1094 lfe->nsh.path_list_index =
1095 fib_path_list_create (FIB_PATH_LIST_FLAG_NONE, rpaths);
1098 * become a child of the path-list so we receive updates when
1099 * its forwarding state changes. this includes an implicit lock.
1101 lfe->nsh.child_index =
1102 fib_path_list_child_add (lfe->nsh.path_list_index,
1103 FIB_NODE_TYPE_LISP_GPE_FWD_ENTRY,
1104 lfe - lgm->lisp_fwd_entry_pool);
1108 lfe->action = a->action;
1111 lisp_gpe_nsh_update_fwding (lfe);
1117 * @brief conver from the embedded fib_node_t struct to the LSIP entry
1119 static lisp_gpe_fwd_entry_t *
1120 lisp_gpe_fwd_entry_from_fib_node (fib_node_t * node)
1122 return ((lisp_gpe_fwd_entry_t *) (((char *) node) -
1123 STRUCT_OFFSET_OF (lisp_gpe_fwd_entry_t,
1128 * @brief Function invoked during a backwalk of the FIB graph
1130 static fib_node_back_walk_rc_t
1131 lisp_gpe_fib_node_back_walk (fib_node_t * node,
1132 fib_node_back_walk_ctx_t * ctx)
1134 lisp_gpe_fwd_entry_t *lfe = lisp_gpe_fwd_entry_from_fib_node (node);
1136 if (fid_addr_type (&lfe->key->rmt) == FID_ADDR_MAC)
1137 lisp_gpe_l2_update_fwding (lfe);
1138 else if (fid_addr_type (&lfe->key->rmt) == FID_ADDR_NSH)
1139 lisp_gpe_nsh_update_fwding (lfe);
1141 return (FIB_NODE_BACK_WALK_CONTINUE);
1145 * @brief Get a fib_node_t struct from the index of a LISP fwd entry
1148 lisp_gpe_fwd_entry_get_fib_node (fib_node_index_t index)
1150 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1151 lisp_gpe_fwd_entry_t *lfe;
1153 lfe = pool_elt_at_index (lgm->lisp_fwd_entry_pool, index);
1155 return (&(lfe->node));
1159 * @brief An indication from the graph that the last lock has gone
1162 lisp_gpe_fwd_entry_fib_node_last_lock_gone (fib_node_t * node)
1164 /* We don't manage the locks of the LISP objects via the graph, since
1165 * this object has no children. so this is a no-op. */
1169 * @brief Virtual function table to register with FIB for the LISP type
1171 const static fib_node_vft_t lisp_fwd_vft = {
1172 .fnv_get = lisp_gpe_fwd_entry_get_fib_node,
1173 .fnv_last_lock = lisp_gpe_fwd_entry_fib_node_last_lock_gone,
1174 .fnv_back_walk = lisp_gpe_fib_node_back_walk,
1178 * @brief Forwarding entry create/remove dispatcher.
1180 * Calls l2 or l3 forwarding entry add/del function based on input data.
1182 * @param[in] a Forwarding entry parameters.
1183 * @param[out] hw_if_indexp NOT USED
1185 * @return 0 on success.
1188 vnet_lisp_gpe_add_del_fwd_entry (vnet_lisp_gpe_add_del_fwd_entry_args_t * a,
1191 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1194 if (vnet_lisp_gpe_enable_disable_status () == 0)
1196 clib_warning ("LISP is disabled!");
1197 return VNET_API_ERROR_LISP_DISABLED;
1200 type = gid_address_type (&a->rmt_eid);
1203 case GID_ADDR_IP_PREFIX:
1205 return add_ip_fwd_entry (lgm, a);
1207 return del_ip_fwd_entry (lgm, a);
1211 return add_l2_fwd_entry (lgm, a);
1213 return del_l2_fwd_entry (lgm, a);
1216 return add_nsh_fwd_entry (lgm, a);
1218 return del_nsh_fwd_entry (lgm, a);
1220 clib_warning ("Forwarding entries for type %d not supported!", type);
1226 vnet_lisp_flush_stats (void)
1228 lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
1229 vlib_combined_counter_main_t *cm = &lgm->counters;
1232 for (i = 0; i < vlib_combined_counter_n_counters (cm); i++)
1233 vlib_zero_combined_counter (cm, i);
1239 lisp_del_adj_stats (lisp_gpe_main_t * lgm, u32 fwd_entry_index, u32 ti)
1242 lisp_stats_key_t key;
1247 memset (&key, 0, sizeof (key));
1248 key.fwd_entry_index = fwd_entry_index;
1249 key.tunnel_index = ti;
1251 p = hash_get_mem (lgm->lisp_stats_index_by_key, &key);
1254 s = pool_elt_at_index (lgm->dummy_stats_pool, p[0]);
1255 hp = hash_get_pair (lgm->lisp_stats_index_by_key, &key);
1256 key_copy = (void *) (hp->key);
1257 hash_unset_mem (lgm->lisp_stats_index_by_key, &key);
1258 clib_mem_free (key_copy);
1259 pool_put (lgm->dummy_stats_pool, s);
1264 vnet_lisp_gpe_del_fwd_counters (vnet_lisp_gpe_add_del_fwd_entry_args_t * a,
1265 u32 fwd_entry_index)
1267 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1268 lisp_gpe_fwd_entry_key_t fe_key;
1269 lisp_gpe_fwd_entry_t *lfe;
1270 lisp_fwd_path_t *path;
1271 const lisp_gpe_adjacency_t *ladj;
1273 lfe = find_fwd_entry (lgm, a, &fe_key);
1277 if (LISP_GPE_FWD_ENTRY_TYPE_NORMAL != lfe->type)
1280 vec_foreach (path, lfe->paths)
1282 ladj = lisp_gpe_adjacency_get (path->lisp_adj);
1283 lisp_del_adj_stats (lgm, fwd_entry_index, ladj->tunnel_index);
1288 * @brief Flush all the forwrding entries
1291 vnet_lisp_gpe_fwd_entry_flush (void)
1293 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1294 lisp_gpe_fwd_entry_t *lfe;
1297 pool_foreach (lfe, lgm->lisp_fwd_entry_pool,
1299 switch (fid_addr_type(&lfe->key->rmt))
1302 del_l2_fwd_entry_i (lgm, lfe);
1304 case FID_ADDR_IP_PREF:
1305 del_ip_fwd_entry_i (lgm, lfe);
1308 del_nsh_fwd_entry_i (lgm, lfe);
1316 format_lisp_fwd_path (u8 * s, va_list ap)
1318 lisp_fwd_path_t *lfp = va_arg (ap, lisp_fwd_path_t *);
1320 s = format (s, "weight:%d ", lfp->weight);
1321 s = format (s, "adj:[%U]\n",
1322 format_lisp_gpe_adjacency,
1323 lisp_gpe_adjacency_get (lfp->lisp_adj),
1324 LISP_GPE_ADJ_FORMAT_FLAG_NONE);
1329 typedef enum lisp_gpe_fwd_entry_format_flag_t_
1331 LISP_GPE_FWD_ENTRY_FORMAT_NONE = (0 << 0),
1332 LISP_GPE_FWD_ENTRY_FORMAT_DETAIL = (1 << 1),
1333 } lisp_gpe_fwd_entry_format_flag_t;
1337 format_lisp_gpe_fwd_entry (u8 * s, va_list ap)
1339 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1340 lisp_gpe_fwd_entry_t *lfe = va_arg (ap, lisp_gpe_fwd_entry_t *);
1341 lisp_gpe_fwd_entry_format_flag_t flags =
1342 va_arg (ap, lisp_gpe_fwd_entry_format_flag_t);
1344 s = format (s, "VNI:%d VRF:%d EID: %U -> %U [index:%d]",
1345 lfe->key->vni, lfe->eid_table_id,
1346 format_fid_address, &lfe->key->lcl,
1347 format_fid_address, &lfe->key->rmt,
1348 lfe - lgm->lisp_fwd_entry_pool);
1350 if (LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE == lfe->type)
1352 s = format (s, "\n Negative - action:%U",
1353 format_negative_mapping_action, lfe->action);
1357 lisp_fwd_path_t *path;
1359 s = format (s, "\n via:");
1360 vec_foreach (path, lfe->paths)
1362 s = format (s, "\n %U", format_lisp_fwd_path, path);
1366 if (flags & LISP_GPE_FWD_ENTRY_FORMAT_DETAIL)
1368 switch (fid_addr_type (&lfe->key->rmt))
1371 s = format (s, " fib-path-list:%d\n", lfe->l2.path_list_index);
1372 s = format (s, " dpo:%U\n", format_dpo_id, &lfe->l2.dpo, 0);
1375 s = format (s, " fib-path-list:%d\n", lfe->nsh.path_list_index);
1376 s = format (s, " dpo:%U\n", format_dpo_id, &lfe->nsh.dpo, 0);
1378 case FID_ADDR_IP_PREF:
1386 static clib_error_t *
1387 lisp_gpe_fwd_entry_show (vlib_main_t * vm,
1388 unformat_input_t * input, vlib_cli_command_t * cmd)
1390 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1391 lisp_gpe_fwd_entry_t *lfe;
1395 if (unformat (input, "vni %d", &vni))
1397 else if (unformat (input, "%d", &index))
1399 if (!pool_is_free_index (lgm->lisp_fwd_entry_pool, index))
1401 lfe = pool_elt_at_index (lgm->lisp_fwd_entry_pool, index);
1403 vlib_cli_output (vm, "[%d@] %U",
1405 format_lisp_gpe_fwd_entry, lfe,
1406 LISP_GPE_FWD_ENTRY_FORMAT_DETAIL);
1410 vlib_cli_output (vm, "entry %d invalid", index);
1417 pool_foreach (lfe, lgm->lisp_fwd_entry_pool,
1420 (lfe->key->vni == vni))
1421 vlib_cli_output (vm, "%U", format_lisp_gpe_fwd_entry, lfe,
1422 LISP_GPE_FWD_ENTRY_FORMAT_NONE);
1430 VLIB_CLI_COMMAND (lisp_gpe_fwd_entry_show_command, static) = {
1431 .path = "show gpe entry",
1432 .short_help = "show gpe entry vni <vni> vrf <vrf> [leid <leid>] reid <reid>",
1433 .function = lisp_gpe_fwd_entry_show,
1438 lisp_gpe_fwd_entry_init (vlib_main_t * vm)
1440 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1441 clib_error_t *error = NULL;
1443 if ((error = vlib_call_init_function (vm, lisp_cp_dpo_module_init)))
1449 fib_node_register_type (FIB_NODE_TYPE_LISP_GPE_FWD_ENTRY, &lisp_fwd_vft);
1455 vnet_lisp_gpe_get_fwd_entry_vnis (void)
1457 lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
1458 lisp_gpe_fwd_entry_t *lfe;
1462 pool_foreach (lfe, lgm->lisp_fwd_entry_pool,
1464 hash_set (vnis, lfe->key->vni, 0);
1471 lisp_api_gpe_fwd_entry_t *
1472 vnet_lisp_gpe_fwd_entries_get_by_vni (u32 vni)
1474 lisp_gpe_main_t *lgm = &lisp_gpe_main;
1475 lisp_gpe_fwd_entry_t *lfe;
1476 lisp_api_gpe_fwd_entry_t *entries = 0, e;
1479 pool_foreach (lfe, lgm->lisp_fwd_entry_pool,
1481 if (lfe->key->vni == vni)
1483 memset (&e, 0, sizeof (e));
1484 e.dp_table = lfe->eid_table_id;
1485 e.vni = lfe->key->vni;
1486 if (lfe->type == LISP_GPE_FWD_ENTRY_TYPE_NEGATIVE)
1487 e.action = lfe->action;
1488 e.fwd_entry_index = lfe - lgm->lisp_fwd_entry_pool;
1489 memcpy (&e.reid, &lfe->key->rmt, sizeof (e.reid));
1490 memcpy (&e.leid, &lfe->key->lcl, sizeof (e.leid));
1491 vec_add1 (entries, e);
1499 VLIB_INIT_FUNCTION (lisp_gpe_fwd_entry_init);
1502 * fd.io coding-style-patch-verification: ON
1505 * eval: (c-set-style "gnu")