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/adj/adj.h>
17 #include <vnet/adj/adj_internal.h>
18 #include <vnet/adj/adj_glean.h>
19 #include <vnet/adj/adj_midchain.h>
20 #include <vnet/fib/fib_node_list.h>
23 * Special Adj with index zero. we need to define this since the v4 mtrie
24 * assumes an index of 0 implies the ply is empty. therefore all 'real'
25 * adjs need a non-zero index.
27 static ip_adjacency_t *special_v4_miss_adj_with_index_zero;
29 /* Adjacency packet/byte counters indexed by adjacency index. */
30 vlib_combined_counter_main_t adjacency_counters;
35 ip_adjacency_t *adj_pool;
38 adj_poison (ip_adjacency_t * adj)
42 memset (adj, 0xfe, sizeof (adj[0]));
47 adj_alloc (fib_protocol_t proto)
51 pool_get(adj_pool, adj);
55 /* Make sure certain fields are always initialized. */
56 /* Validate adjacency counters. */
57 vlib_validate_combined_counter(&adjacency_counters,
60 adj->rewrite_header.sw_if_index = ~0;
61 adj->mcast_group_index = ~0;
62 adj->saved_lookup_next_index = 0;
64 adj->lookup_next_index = 0;
66 fib_node_init(&adj->ia_node,
68 adj->ia_nh_proto = proto;
71 ip4_main.lookup_main.adjacency_heap = adj_pool;
72 ip6_main.lookup_main.adjacency_heap = adj_pool;
78 adj_index_is_special (adj_index_t adj_index)
80 if (ADJ_INDEX_INVALID == adj_index)
87 * @brief Pretty print helper function for formatting specific adjacencies.
88 * @param s - input string to format
89 * @param args - other args passed to format function such as:
95 format_ip_adjacency (u8 * s, va_list * args)
97 format_ip_adjacency_flags_t fiaf;
101 adj_index = va_arg (*args, u32);
102 fiaf = va_arg (*args, format_ip_adjacency_flags_t);
103 adj = adj_get(adj_index);
105 switch (adj->lookup_next_index)
107 case IP_LOOKUP_NEXT_REWRITE:
108 s = format (s, "%U", format_adj_nbr, adj_index, 0);
110 case IP_LOOKUP_NEXT_ARP:
111 s = format (s, "%U", format_adj_nbr_incomplete, adj_index, 0);
113 case IP_LOOKUP_NEXT_GLEAN:
114 s = format (s, "%U", format_adj_glean, adj_index, 0);
116 case IP_LOOKUP_NEXT_MIDCHAIN:
117 s = format (s, "%U", format_adj_midchain, adj_index, 2);
123 if (fiaf & FORMAT_IP_ADJACENCY_DETAIL)
125 vlib_counter_t counts;
127 vlib_get_combined_counter(&adjacency_counters, adj_index, &counts);
128 s = format (s, "\n counts:[%Ld:%Ld]", counts.packets, counts.bytes);
129 s = format (s, "\n locks:%d", adj->ia_node.fn_locks);
130 s = format (s, " node:[%d]:%U",
131 adj->rewrite_header.node_index,
132 format_vlib_node_name, vlib_get_main(),
133 adj->rewrite_header.node_index);
134 s = format (s, " next:[%d]:%U",
135 adj->rewrite_header.next_index,
136 format_vlib_next_node_name,
138 adj->rewrite_header.node_index,
139 adj->rewrite_header.next_index);
140 s = format(s, "\n children:\n ");
141 s = fib_node_children_format(adj->ia_node.fn_children, s);
150 * last lock/reference to the adj has gone, we no longer need it.
153 adj_last_lock_gone (ip_adjacency_t *adj)
155 vlib_main_t * vm = vlib_get_main();
157 ASSERT(0 == fib_node_list_get_size(adj->ia_node.fn_children));
158 ADJ_DBG(adj, "last-lock-gone");
160 vlib_worker_thread_barrier_sync (vm);
162 switch (adj->lookup_next_index)
164 case IP_LOOKUP_NEXT_MIDCHAIN:
165 dpo_reset(&adj->sub_type.midchain.next_dpo);
167 case IP_LOOKUP_NEXT_ARP:
168 case IP_LOOKUP_NEXT_REWRITE:
170 * complete and incomplete nbr adjs
172 adj_nbr_remove(adj_get_index(adj),
175 &adj->sub_type.nbr.next_hop,
176 adj->rewrite_header.sw_if_index);
178 case IP_LOOKUP_NEXT_GLEAN:
179 adj_glean_remove(adj->ia_nh_proto,
180 adj->rewrite_header.sw_if_index);
184 * type not stored in any DB from which we need to remove it
189 vlib_worker_thread_barrier_release(vm);
191 fib_node_deinit(&adj->ia_node);
192 pool_put(adj_pool, adj);
196 adj_lock (adj_index_t adj_index)
200 if (adj_index_is_special(adj_index))
205 adj = adj_get(adj_index);
208 ADJ_DBG(adj, "lock");
209 fib_node_lock(&adj->ia_node);
213 adj_unlock (adj_index_t adj_index)
217 if (adj_index_is_special(adj_index))
222 adj = adj_get(adj_index);
225 ADJ_DBG(adj, "unlock");
228 fib_node_unlock(&adj->ia_node);
232 adj_child_add (adj_index_t adj_index,
233 fib_node_type_t child_type,
234 fib_node_index_t child_index)
236 ASSERT(ADJ_INDEX_INVALID != adj_index);
237 if (adj_index_is_special(adj_index))
242 return (fib_node_child_add(FIB_NODE_TYPE_ADJ,
249 adj_child_remove (adj_index_t adj_index,
252 if (adj_index_is_special(adj_index))
257 fib_node_child_remove(FIB_NODE_TYPE_ADJ,
263 * @brief Return the link type of the adjacency
266 adj_get_link_type (adj_index_t ai)
268 const ip_adjacency_t *adj;
272 return (adj->ia_link);
276 * @brief Return the sw interface index of the adjacency.
279 adj_get_sw_if_index (adj_index_t ai)
281 const ip_adjacency_t *adj;
285 return (adj->rewrite_header.sw_if_index);
289 * @brief Return the link type of the adjacency
292 adj_get_rewrite (adj_index_t ai)
294 vnet_rewrite_header_t *rw;
298 rw = &adj->rewrite_header;
300 ASSERT (rw->data_bytes != 0xfefe);
302 return (rw->data - rw->data_bytes);
306 adj_get_node (fib_node_index_t index)
310 adj = adj_get(index);
312 return (&adj->ia_node);
315 #define ADJ_FROM_NODE(_node) \
316 ((ip_adjacency_t*)((char*)_node - STRUCT_OFFSET_OF(ip_adjacency_t, ia_node)))
319 adj_node_last_lock_gone (fib_node_t *node)
321 adj_last_lock_gone(ADJ_FROM_NODE(node));
324 static fib_node_back_walk_rc_t
325 adj_back_walk_notify (fib_node_t *node,
326 fib_node_back_walk_ctx_t *ctx)
329 * Que pasa. yo soj en el final!
333 return (FIB_NODE_BACK_WALK_CONTINUE);
337 * Adjacency's graph node virtual function table
339 static const fib_node_vft_t adj_vft = {
340 .fnv_get = adj_get_node,
341 .fnv_last_lock = adj_node_last_lock_gone,
342 .fnv_back_walk = adj_back_walk_notify,
345 static clib_error_t *
346 adj_module_init (vlib_main_t * vm)
348 fib_node_register_type(FIB_NODE_TYPE_ADJ, &adj_vft);
350 adj_nbr_module_init();
351 adj_glean_module_init();
352 adj_midchain_module_init();
355 * one special adj to reserve index 0
357 special_v4_miss_adj_with_index_zero = adj_alloc(FIB_PROTOCOL_IP4);
362 VLIB_INIT_FUNCTION (adj_module_init);
364 static clib_error_t *
365 adj_show (vlib_main_t * vm,
366 unformat_input_t * input,
367 vlib_cli_command_t * cmd)
369 adj_index_t ai = ADJ_INDEX_INVALID;
370 u32 sw_if_index = ~0;
372 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
374 if (unformat (input, "%d", &ai))
376 else if (unformat (input, "%U",
377 unformat_vnet_sw_interface, vnet_get_main(),
384 if (ADJ_INDEX_INVALID != ai)
386 if (pool_is_free_index(adj_pool, ai))
388 vlib_cli_output (vm, "adjacency %d invalid", ai);
392 vlib_cli_output (vm, "[@%d] %U",
394 format_ip_adjacency, ai,
395 FORMAT_IP_ADJACENCY_DETAIL);
400 pool_foreach_index(ai, adj_pool,
402 if (~0 != sw_if_index &&
403 sw_if_index != adj_get_sw_if_index(ai))
408 vlib_cli_output (vm, "[@%d] %U",
410 format_ip_adjacency, ai,
411 FORMAT_IP_ADJACENCY_NONE);
421 * Show all adjacencies.
423 * @cliexstart{sh adj}
426 * [@2] ipv4 via 1.0.0.2 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
427 * [@3] mpls via 1.0.0.2 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
428 * [@4] ipv4 via 1.0.0.3 loop0: IP4: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
429 * [@5] mpls via 1.0.0.3 loop0: MPLS_UNICAST: 00:00:22:aa:bb:cc -> 00:00:11:aa:bb:cc
432 VLIB_CLI_COMMAND (adj_show_command, static) = {
434 .short_help = "show adj [<adj_index>] [interface]",
435 .function = adj_show,
439 * DEPRECATED: DO NOT USE
442 ip_add_adjacency (ip_lookup_main_t * lm,
443 ip_adjacency_t * copy_adj,
445 u32 * adj_index_return)
447 ip_adjacency_t * adj;
451 adj = adj_alloc(FIB_PROTOCOL_IP4);
456 *adj_index_return = adj_get_index(adj);