2 * l2_fib.c : layer 2 forwarding table (aka mac table)
4 * Copyright (c) 2013 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 #include <vlib/vlib.h>
20 #include <vnet/vnet.h>
21 #include <vnet/ethernet/ethernet.h>
24 #include <vppinfra/error.h>
25 #include <vppinfra/hash.h>
26 #include <vnet/l2/l2_input.h>
27 #include <vnet/l2/l2_fib.h>
28 #include <vnet/l2/l2_learn.h>
29 #include <vnet/l2/l2_bd.h>
30 #include <vppinfra/bihash_template.c>
31 #include <vlibmemory/api.h>
33 #include <vnet/l2/l2.api_enum.h>
34 #include <vnet/l2/l2.api_types.h>
37 #include <vnet/l2/l2.api.h>
42 * @brief Ethernet MAC Address FIB Table Management.
44 * The MAC Address forwarding table for bridge-domains is called the l2fib.
45 * Entries are added automatically as part of mac learning, but MAC Addresses
46 * entries can also be added manually.
50 l2fib_main_t l2fib_main;
53 format_l2fib_entry_result_flags (u8 * s, va_list * args)
55 l2fib_entry_result_flags_t flags = va_arg (*args, int);
57 if (L2FIB_ENTRY_RESULT_FLAG_NONE == flags)
59 s = format (s, "none");
64 if (flags & L2FIB_ENTRY_RESULT_FLAG_##a) \
65 s = format (s, "%s ", t); \
67 foreach_l2fib_entry_result_attr
74 incr_mac_address (u8 * mac)
76 u64 tmp = *((u64 *) mac);
77 tmp = clib_net_to_host_u64 (tmp);
78 tmp += 1 << 16; /* skip unused (least significant) octets */
79 tmp = clib_host_to_net_u64 (tmp);
81 clib_memcpy_fast (mac, &tmp, 6);
84 /** Format sw_if_index. If the value is ~0, use the text "N/A" */
86 format_vnet_sw_if_index_name_with_NA (u8 * s, va_list * args)
88 vnet_main_t *vnm = va_arg (*args, vnet_main_t *);
89 u32 sw_if_index = va_arg (*args, u32);
90 if (sw_if_index == ~0)
91 return format (s, "N/A");
93 vnet_sw_interface_t *swif =
94 vnet_get_sw_interface_or_null (vnm, sw_if_index);
96 return format (s, "Stale");
98 return format (s, "%U", format_vnet_sw_if_index_name, vnm, sw_if_index);
101 typedef struct l2fib_dump_walk_ctx_t_
104 l2fib_entry_key_t *l2fe_key;
105 l2fib_entry_result_t *l2fe_res;
106 } l2fib_dump_walk_ctx_t;
109 l2fib_dump_walk_cb (BVT (clib_bihash_kv) * kvp, void *arg)
111 l2fib_dump_walk_ctx_t *ctx = arg;
112 l2fib_entry_result_t result;
113 l2fib_entry_key_t key;
116 result.raw = kvp->value;
118 if ((ctx->bd_index == ~0) || (ctx->bd_index == key.fields.bd_index))
120 vec_add1 (ctx->l2fe_key, key);
121 vec_add1 (ctx->l2fe_res, result);
124 return (BIHASH_WALK_CONTINUE);
128 l2fib_table_dump (u32 bd_index,
129 l2fib_entry_key_t ** l2fe_key,
130 l2fib_entry_result_t ** l2fe_res)
132 l2fib_main_t *msm = &l2fib_main;
133 l2fib_dump_walk_ctx_t ctx = {
134 .bd_index = bd_index,
137 BV (clib_bihash_foreach_key_value_pair)
138 (&msm->mac_table, l2fib_dump_walk_cb, &ctx);
140 *l2fe_key = ctx.l2fe_key;
141 *l2fe_res = ctx.l2fe_res;
145 l2_fib_extract_seq_num (l2fib_seq_num_t sn, u8 * bd_sn, u8 * if_sn)
152 format_l2_fib_seq_num (u8 * s, va_list * a)
154 l2fib_seq_num_t sn = va_arg (*a, int);
157 l2_fib_extract_seq_num (sn, &bd_sn, &if_sn);
159 s = format (s, "%3d/%-3d", bd_sn, if_sn);
164 typedef struct l2fib_show_walk_ctx_t_
175 } l2fib_show_walk_ctx_t;
178 l2fib_show_walk_cb (BVT (clib_bihash_kv) * kvp, void *arg)
180 l2fib_show_walk_ctx_t *ctx = arg;
181 l2_bridge_domain_t *bd_config;
182 l2fib_entry_result_t result;
183 l2fib_entry_key_t key;
185 if (ctx->verbose && ctx->first_entry)
187 ctx->first_entry = 0;
188 vlib_cli_output (ctx->vm,
189 "%=19s%=7s%=7s%=8s%=9s%=7s%=7s%=5s%=30s",
190 "Mac-Address", "BD-Idx", "If-Idx",
191 "BSN-ISN", "Age(min)", "static", "filter",
192 "bvi", "Interface-Name");
196 result.raw = kvp->value;
197 ctx->total_entries++;
200 ((ctx->bd_index >> 31) || (ctx->bd_index == key.fields.bd_index)))
204 if (ctx->learn && l2fib_entry_result_is_set_AGE_NOT (&result))
205 return (BIHASH_WALK_CONTINUE); /* skip provisioned macs */
207 if (ctx->add && !l2fib_entry_result_is_set_AGE_NOT (&result))
208 return (BIHASH_WALK_CONTINUE); /* skip learned macs */
210 bd_config = &vec_elt (l2input_main.bd_configs, key.fields.bd_index);
212 if (l2fib_entry_result_is_set_AGE_NOT (&result))
213 s = format (s, "no");
214 else if (bd_config->mac_age == 0)
218 i16 delta = ctx->now - result.fields.timestamp;
219 delta += delta < 0 ? 256 : 0;
220 s = format (s, "%d", delta);
223 vlib_cli_output (ctx->vm,
224 "%=19U%=7d%=7d %U%=9v%=7s%=7s%=5s%=30U",
225 format_ethernet_address, key.fields.mac,
227 result.fields.sw_if_index == ~0
228 ? -1 : result.fields.sw_if_index,
229 format_l2_fib_seq_num, result.fields.sn, s,
230 l2fib_entry_result_is_set_STATIC (&result) ? "*" : "-",
231 l2fib_entry_result_is_set_FILTER (&result) ? "*" : "-",
232 l2fib_entry_result_is_set_BVI (&result) ? "*" : "-",
233 format_vnet_sw_if_index_name_with_NA,
234 ctx->vnm, result.fields.sw_if_index);
238 return (BIHASH_WALK_CONTINUE);
241 /** Display the contents of the l2fib. */
242 static clib_error_t *
243 show_l2fib (vlib_main_t * vm,
244 unformat_input_t * input, vlib_cli_command_t * cmd)
246 bd_main_t *bdm = &bd_main;
247 l2fib_main_t *msm = &l2fib_main;
250 l2fib_show_walk_ctx_t ctx = {
253 .now = (u8) (vlib_time_now (vm) / 60),
255 .vnm = msm->vnet_main,
258 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
260 if (unformat (input, "raw"))
266 else if (unformat (input, "verbose"))
268 else if (unformat (input, "all"))
270 else if (unformat (input, "bd_index %d", &ctx.bd_index))
272 else if (unformat (input, "learn"))
278 else if (unformat (input, "add"))
284 else if (unformat (input, "bd_id %d", &bd_id))
286 uword *p = hash_get (bdm->bd_index_by_bd_id, bd_id);
293 return clib_error_return (0,
294 "bridge domain id %d doesn't exist\n",
301 if (msm->mac_table_initialized == 0)
303 vlib_cli_output (vm, "no l2fib entries");
307 BV (clib_bihash_foreach_key_value_pair)
308 (&msm->mac_table, l2fib_show_walk_cb, &ctx);
310 if (ctx.total_entries == 0)
311 vlib_cli_output (vm, "no l2fib entries");
314 l2learn_main_t *lm = &l2learn_main;
315 vlib_cli_output (vm, "L2FIB total/learned entries: %d/%d "
316 "Last scan time: %.4esec Learn limit: %d ",
317 ctx.total_entries, lm->global_learn_count,
318 msm->age_scan_duration, lm->global_learn_limit);
320 vlib_cli_output (vm, "L2MAC events client PID: %d "
321 "Last e-scan time: %.4esec Delay: %.2esec "
322 "Max macs in event: %d",
323 lm->client_pid, msm->evt_scan_duration,
324 msm->event_scan_delay, msm->max_macs_in_event);
328 vlib_cli_output (vm, "Raw Hash Table:\n%U\n",
329 BV (format_bihash), &msm->mac_table, 1 /* verbose */ );
335 * This command displays the MAC Address entries of the L2 FIB table.
336 * Output can be filtered to just get the number of MAC Addresses or display
337 * each MAC Address for all bridge domains or just a single bridge domain.
340 * Example of how to display the number of MAC Address entries in the L2
342 * @cliexstart{show l2fib}
345 * Example of how to display all the MAC Address entries in the L2
347 * @cliexstart{show l2fib all}
348 * Mac Address BD Idx Interface Index static filter bvi refresh timestamp
349 * 52:54:00:53:18:33 1 GigabitEthernet0/8/0.200 3 0 0 0 0 0
350 * 52:54:00:53:18:55 1 GigabitEthernet0/8/0.200 3 1 0 0 0 0
351 * 52:54:00:53:18:77 1 N/A -1 1 1 0 0 0
356 VLIB_CLI_COMMAND (show_l2fib_cli, static) = {
357 .path = "show l2fib",
358 .short_help = "show l2fib [all] | [bd_id <nn> | bd_index <nn>] [learn | add] | [raw]",
359 .function = show_l2fib,
364 l2fib_table_init (void)
366 l2fib_main_t *mp = &l2fib_main;
368 if (mp->mac_table_initialized == 1)
371 BV (clib_bihash_init) (&mp->mac_table, "l2fib mac table",
372 mp->mac_table_n_buckets, mp->mac_table_memory_size);
373 mp->mac_table_initialized = 1;
376 /* Remove all entries from the l2fib */
378 l2fib_clear_table (void)
380 l2fib_main_t *mp = &l2fib_main;
381 l2_bridge_domain_t *bd_config;
383 if (mp->mac_table_initialized == 0)
386 mp->mac_table_initialized = 0;
388 /* Remove all entries */
389 BV (clib_bihash_free) (&mp->mac_table);
391 l2learn_main.global_learn_count = 0;
392 vec_foreach (bd_config, l2input_main.bd_configs)
393 bd_config->learn_count = 0;
396 /** Clear all entries in L2FIB.
397 * @TODO: Later we may want a way to remove only the non-static entries
399 static clib_error_t *
400 clear_l2fib (vlib_main_t * vm,
401 unformat_input_t * input, vlib_cli_command_t * cmd)
403 l2fib_clear_table ();
408 * This command clears all the MAC Address entries from the L2 FIB table.
411 * Example of how to clear the L2 FIB Table:
412 * @cliexcmd{clear l2fib}
413 * Example to show the L2 FIB Table has been cleared:
414 * @cliexstart{show l2fib verbose}
419 VLIB_CLI_COMMAND (clear_l2fib_cli, static) = {
420 .path = "clear l2fib",
421 .short_help = "clear l2fib",
422 .function = clear_l2fib,
426 static l2fib_seq_num_t
427 l2fib_cur_seq_num (u32 bd_index, u32 sw_if_index)
429 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);
431 return l2_fib_mk_seq_num (bd_config->seq_num,
432 l2_input_seq_num (sw_if_index));
436 * Add an entry to the l2fib.
437 * If the entry already exists then overwrite it
440 l2fib_add_entry (const u8 * mac, u32 bd_index,
441 u32 sw_if_index, l2fib_entry_result_flags_t flags)
443 l2fib_entry_key_t key;
444 l2fib_entry_result_t result;
445 __attribute__ ((unused)) u32 bucket_contents;
446 l2fib_main_t *fm = &l2fib_main;
447 l2learn_main_t *lm = &l2learn_main;
448 BVT (clib_bihash_kv) kv;
450 if (fm->mac_table_initialized == 0)
454 key.raw = l2fib_make_key (mac, bd_index);
457 /* check if entry already exist */
458 if (BV (clib_bihash_search) (&fm->mac_table, &kv, &kv))
460 /* decrement counter if overwriting a learned mac */
461 result.raw = kv.value;
462 if (!l2fib_entry_result_is_set_AGE_NOT (&result))
464 l2_bridge_domain_t *bd_config =
465 vec_elt_at_index (l2input_main.bd_configs, bd_index);
467 /* check if learn_count == 0 in case of race condition between 2
468 * workers adding an entry simultaneously */
469 /* learn_count variable may have little inaccuracy because they are
470 * not incremented/decremented with atomic operations */
471 /* l2fib_scan is call every 2sec fixing potential inaccuracy */
472 if (lm->global_learn_count)
473 lm->global_learn_count--;
474 if (bd_config->learn_count)
475 bd_config->learn_count--;
480 result.raw = 0; /* clear all fields */
481 result.fields.sw_if_index = sw_if_index;
482 result.fields.flags = flags;
484 /* no aging for provisioned entry */
485 l2fib_entry_result_set_AGE_NOT (&result);
487 kv.value = result.raw;
489 BV (clib_bihash_add_del) (&fm->mac_table, &kv, 1 /* is_add */ );
493 * Add an entry to the L2FIB.
495 * l2fib add <mac> <bd> <intf> [static] [bvi]
496 * l2fib add <mac> <bd> filter
497 * Note that filter and bvi entries are always static
499 static clib_error_t *
500 l2fib_add (vlib_main_t * vm,
501 unformat_input_t * input, vlib_cli_command_t * cmd)
503 bd_main_t *bdm = &bd_main;
504 vnet_main_t *vnm = vnet_get_main ();
505 clib_error_t *error = 0;
509 u32 sw_if_index = ~0;
511 l2fib_entry_result_flags_t flags;
513 flags = L2FIB_ENTRY_RESULT_FLAG_NONE;
515 if (!unformat (input, "%U", unformat_ethernet_address, mac))
517 error = clib_error_return (0, "expected mac address `%U'",
518 format_unformat_error, input);
522 if (!unformat (input, "%d", &bd_id))
524 error = clib_error_return (0, "expected bridge domain ID `%U'",
525 format_unformat_error, input);
529 p = hash_get (bdm->bd_index_by_bd_id, bd_id);
532 error = clib_error_return (0, "bridge domain ID %d invalid", bd_id);
537 if (unformat (input, "filter"))
539 l2fib_add_filter_entry (mac, bd_index);
543 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
545 error = clib_error_return (0, "unknown interface `%U'",
546 format_unformat_error, input);
550 if (unformat (input, "static"))
551 flags |= L2FIB_ENTRY_RESULT_FLAG_STATIC;
552 else if (unformat (input, "bvi"))
553 flags |= (L2FIB_ENTRY_RESULT_FLAG_STATIC | L2FIB_ENTRY_RESULT_FLAG_BVI);
555 if (vec_len (l2input_main.configs) <= sw_if_index)
557 error = clib_error_return (0, "Interface sw_if_index %d not in L2 mode",
562 l2fib_add_entry (mac, bd_index, sw_if_index, flags);
569 * This command adds a MAC Address entry to the L2 FIB table
570 * of an existing bridge-domain. The MAC Address can be static
571 * or dynamic. This command also allows a filter to be added,
572 * such that packets with given MAC Addresses (source mac or
573 * destination mac match) are dropped.
576 * Example of how to add a dynamic MAC Address entry to the L2 FIB table
577 * of a bridge-domain (where 200 is the bridge-domain-id):
578 * @cliexcmd{l2fib add 52:54:00:53:18:33 200 GigabitEthernet0/8/0.200}
579 * Example of how to add a static MAC Address entry to the L2 FIB table
580 * of a bridge-domain (where 200 is the bridge-domain-id):
581 * @cliexcmd{l2fib add 52:54:00:53:18:55 200 GigabitEthernet0/8/0.200 static}
582 * Example of how to add a filter such that a packet with the given MAC
583 * Address will be dropped in a given bridge-domain (where 200 is the
585 * @cliexcmd{l2fib add 52:54:00:53:18:77 200 filter}
586 * Example of show command of the provisioned MAC Addresses and filters:
587 * @cliexstart{show l2fib verbose}
588 * Mac Address BD Idx Interface Index static filter bvi refresh timestamp
589 * 52:54:00:53:18:33 1 GigabitEthernet0/8/0.200 3 0 0 0 0 0
590 * 52:54:00:53:18:55 1 GigabitEthernet0/8/0.200 3 1 0 0 0 0
591 * 52:54:00:53:18:77 1 N/A -1 1 1 0 0 0
596 VLIB_CLI_COMMAND (l2fib_add_cli, static) = {
598 .short_help = "l2fib add <mac> <bridge-domain-id> filter | <intf> [static | bvi]",
599 .function = l2fib_add,
604 static clib_error_t *
605 l2fib_test_command_fn (vlib_main_t * vm,
606 unformat_input_t * input, vlib_cli_command_t * cmd)
608 u8 mac[8], save_mac[6];
618 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
620 if (unformat (input, "mac %U", unformat_ethernet_address, mac))
622 else if (unformat (input, "add"))
624 else if (unformat (input, "del"))
626 else if (unformat (input, "check"))
628 else if (unformat (input, "count %d", &count))
635 return clib_error_return (0, "mac not set");
637 if (is_add == 0 && is_del == 0 && is_check == 0)
638 return clib_error_return (0,
639 "noop: pick at least one of (add,del,check)");
641 clib_memcpy_fast (save_mac, mac, 6);
645 for (i = 0; i < count; i++)
647 l2fib_add_entry (mac, bd_index, sw_if_index,
648 L2FIB_ENTRY_RESULT_FLAG_NONE);
649 incr_mac_address (mac);
655 BVT (clib_bihash_kv) kv;
656 l2fib_main_t *mp = &l2fib_main;
658 if (mp->mac_table_initialized == 0)
659 return clib_error_return (0, "mac table is not initialized");
661 clib_memcpy_fast (mac, save_mac, 6);
663 for (i = 0; i < count; i++)
665 kv.key = l2fib_make_key (mac, bd_index);
666 if (BV (clib_bihash_search) (&mp->mac_table, &kv, &kv))
668 clib_warning ("key %U AWOL", format_ethernet_address, mac);
671 incr_mac_address (mac);
677 clib_memcpy_fast (mac, save_mac, 6);
679 for (i = 0; i < count; i++)
681 l2fib_del_entry (mac, bd_index, 0);
682 incr_mac_address (mac);
690 * The set of '<em>test l2fib</em>' commands allow the L2 FIB table of the default
691 * bridge domain (bridge-domain-id of 0) to be modified.
695 * Example of how to add a set of 4 sequential MAC Address entries to L2
696 * FIB table of the default bridge-domain:
697 * @cliexcmd{test l2fib add mac 52:54:00:53:00:00 count 4}
699 * Show the set of 4 sequential MAC Address entries that were added:
700 * @cliexstart{show l2fib verbose}
701 * Mac Address BD Idx Interface Index static filter bvi refresh timestamp
702 * 52:54:00:53:00:00 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
703 * 52:54:00:53:00:01 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
704 * 52:54:00:53:00:03 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
705 * 52:54:00:53:00:02 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
709 * Example of how to check that the set of 4 sequential MAC Address
710 * entries were added to L2 FIB table of the default
711 * bridge-domain. Used a count of 5 to produce an error:
713 * @cliexcmd{test l2fib check mac 52:54:00:53:00:00 count 5}
714 * The output of the check command is in the log files. Log file
715 * location may vary based on your OS and Version:
717 * <b><em># tail -f /var/log/messages | grep l2fib_test_command_fn</em></b>
719 * Sep 7 17:15:24 localhost vnet[4952]: l2fib_test_command_fn:446: key 52:54:00:53:00:04 AWOL
721 * Example of how to delete a set of 4 sequential MAC Address entries
722 * from L2 FIB table of the default bridge-domain:
723 * @cliexcmd{test l2fib del mac 52:54:00:53:00:00 count 4}
727 VLIB_CLI_COMMAND (l2fib_test_command, static) = {
728 .path = "test l2fib",
729 .short_help = "test l2fib [add|del|check] mac <base-addr> count <nn>",
730 .function = l2fib_test_command_fn,
736 * Delete an entry from the l2fib.
737 * Return 0 if the entry was deleted, or 1 it was not found or if
738 * sw_if_index is non-zero and does not match that in the entry.
741 l2fib_del_entry (const u8 * mac, u32 bd_index, u32 sw_if_index)
743 l2fib_entry_result_t result;
744 l2fib_main_t *mp = &l2fib_main;
745 BVT (clib_bihash_kv) kv;
747 if (mp->mac_table_initialized == 0)
751 kv.key = l2fib_make_key (mac, bd_index);
753 if (BV (clib_bihash_search) (&mp->mac_table, &kv, &kv))
756 result.raw = kv.value;
758 /* check if sw_if_index of entry match */
759 if ((sw_if_index != 0) && (sw_if_index != result.fields.sw_if_index))
762 /* decrement counter if dynamically learned mac */
763 if (!l2fib_entry_result_is_set_AGE_NOT (&result))
765 l2_bridge_domain_t *bd_config =
766 vec_elt_at_index (l2input_main.bd_configs, bd_index);
767 if (l2learn_main.global_learn_count)
768 l2learn_main.global_learn_count--;
769 if (bd_config->learn_count)
770 bd_config->learn_count--;
773 /* Remove entry from hash table */
774 BV (clib_bihash_add_del) (&mp->mac_table, &kv, 0 /* is_add */ );
779 * Delete an entry from the L2FIB.
781 * l2fib del <mac> <bd-id>
783 static clib_error_t *
784 l2fib_del (vlib_main_t * vm,
785 unformat_input_t * input, vlib_cli_command_t * cmd)
787 bd_main_t *bdm = &bd_main;
788 clib_error_t *error = 0;
794 if (!unformat (input, "%U", unformat_ethernet_address, mac))
796 error = clib_error_return (0, "expected mac address `%U'",
797 format_unformat_error, input);
801 if (!unformat (input, "%d", &bd_id))
803 error = clib_error_return (0, "expected bridge domain ID `%U'",
804 format_unformat_error, input);
808 p = hash_get (bdm->bd_index_by_bd_id, bd_id);
811 error = clib_error_return (0, "bridge domain ID %d invalid", bd_id);
816 /* Delete the entry */
817 if (l2fib_del_entry (mac, bd_index, 0))
819 error = clib_error_return (0, "mac entry not found");
828 * This command deletes an existing MAC Address entry from the L2 FIB
829 * table of an existing bridge-domain.
832 * Example of how to delete a MAC Address entry from the L2 FIB table of a bridge-domain (where 200 is the bridge-domain-id):
833 * @cliexcmd{l2fib del 52:54:00:53:18:33 200}
836 VLIB_CLI_COMMAND (l2fib_del_cli, static) = {
838 .short_help = "l2fib del <mac> <bridge-domain-id> []",
839 .function = l2fib_del,
843 static clib_error_t *
844 l2fib_set_scan_delay (vlib_main_t *vm, unformat_input_t *input,
845 vlib_cli_command_t *cmd)
847 clib_error_t *error = 0;
849 l2fib_main_t *fm = &l2fib_main;
851 if (!unformat (input, "%d", &scan_delay))
853 error = clib_error_return (0, "expecting delay but got `%U'",
854 format_unformat_error, input);
857 fm->event_scan_delay = (f64) (scan_delay) *10e-3;
858 l2fib_flush_all_mac (vlib_get_main ());
864 * This command set scan delay (in 1/10s unit)
867 VLIB_CLI_COMMAND (l2fib_set_scan_delay_cli, static) = {
868 .path = "set l2fib scan-delay",
869 .short_help = "set l2fib scan-delay <delay>",
870 .function = l2fib_set_scan_delay,
874 Kick off ager to scan MACs to age/delete MAC entries
877 l2fib_start_ager_scan (vlib_main_t * vm)
879 uword evt = L2_MAC_AGE_PROCESS_EVENT_ONE_PASS;
881 /* check if there is at least one bd with mac aging enabled */
882 l2_bridge_domain_t *bd_config;
883 vec_foreach (bd_config, l2input_main.bd_configs)
885 if (bd_config->bd_id != ~0 && bd_config->mac_age != 0)
887 evt = L2_MAC_AGE_PROCESS_EVENT_START;
892 vlib_process_signal_event (vm, l2fib_mac_age_scanner_process_node.index,
897 Flush all non static MACs from an interface
900 l2fib_flush_int_mac (vlib_main_t * vm, u32 sw_if_index)
902 l2_input_seq_num_inc (sw_if_index);
903 l2fib_start_ager_scan (vm);
907 Flush all non static MACs in a bridge domain
910 l2fib_flush_bd_mac (vlib_main_t * vm, u32 bd_index)
912 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);
913 bd_config->seq_num += 1;
914 l2fib_start_ager_scan (vm);
918 Flush all non static MACs - flushes all valid BDs
921 l2fib_flush_all_mac (vlib_main_t * vm)
923 l2_bridge_domain_t *bd_config;
924 vec_foreach (bd_config, l2input_main.bd_configs)
925 if (bd_is_valid (bd_config))
926 bd_config->seq_num += 1;
928 l2fib_start_ager_scan (vm);
933 Flush MACs, except static ones, associated with an interface
935 l2fib flush-mac interface <if-name>
937 static clib_error_t *
938 l2fib_flush_mac_int (vlib_main_t * vm,
939 unformat_input_t * input, vlib_cli_command_t * cmd)
941 vnet_main_t *vnm = vnet_get_main ();
942 clib_error_t *error = 0;
945 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
947 error = clib_error_return (0, "unknown interface `%U'",
948 format_unformat_error, input);
952 l2fib_flush_int_mac (vm, sw_if_index);
959 Flush all MACs, except static ones
963 static clib_error_t *
964 l2fib_flush_mac_all (vlib_main_t * vm,
965 unformat_input_t * input, vlib_cli_command_t * cmd)
967 l2fib_flush_all_mac (vm);
972 * This command kick off ager to delete all existing MAC Address entries,
973 * except static ones, associated with an interface from the L2 FIB table.
976 * Example of how to flush MAC Address entries learned on an interface from the L2 FIB table:
977 * @cliexcmd{l2fib flush-mac interface GigabitEthernet2/1/0}
980 VLIB_CLI_COMMAND (l2fib_flush_mac_all_cli, static) = {
981 .path = "l2fib flush-mac all",
982 .short_help = "l2fib flush-mac all",
983 .function = l2fib_flush_mac_all,
988 * This command kick off ager to delete all existing MAC Address entries,
989 * except static ones, associated with an interface from the L2 FIB table.
992 * Example of how to flush MAC Address entries learned on an interface from the L2 FIB table:
993 * @cliexcmd{l2fib flush-mac interface GigabitEthernet2/1/0}
996 VLIB_CLI_COMMAND (l2fib_flush_mac_int_cli, static) = {
997 .path = "l2fib flush-mac interface",
998 .short_help = "l2fib flush-mac interface <if-name>",
999 .function = l2fib_flush_mac_int,
1004 Flush bridge-domain MACs except static ones.
1006 l2fib flush-mac bridge-domain <bd-id>
1008 static clib_error_t *
1009 l2fib_flush_mac_bd (vlib_main_t * vm,
1010 unformat_input_t * input, vlib_cli_command_t * cmd)
1012 bd_main_t *bdm = &bd_main;
1013 clib_error_t *error = 0;
1014 u32 bd_index, bd_id;
1017 if (!unformat (input, "%d", &bd_id))
1019 error = clib_error_return (0, "expecting bridge-domain id but got `%U'",
1020 format_unformat_error, input);
1024 p = hash_get (bdm->bd_index_by_bd_id, bd_id);
1028 return clib_error_return (0, "No such bridge domain %d", bd_id);
1030 l2fib_flush_bd_mac (vm, bd_index);
1037 * This command kick off ager to delete all existing MAC Address entries,
1038 * except static ones, in a bridge domain from the L2 FIB table.
1041 * Example of how to flush MAC Address entries learned in a bridge domain from the L2 FIB table:
1042 * @cliexcmd{l2fib flush-mac bridge-domain 1000}
1045 VLIB_CLI_COMMAND (l2fib_flush_mac_bd_cli, static) = {
1046 .path = "l2fib flush-mac bridge-domain",
1047 .short_help = "l2fib flush-mac bridge-domain <bd-id>",
1048 .function = l2fib_flush_mac_bd,
1053 l2fib_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
1055 l2_input_config_t *config = l2input_intf_config (sw_if_index);
1056 if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0 &&
1057 l2_input_is_bridge (config))
1058 l2fib_flush_int_mac (vnm->vlib_main, sw_if_index);
1062 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (l2fib_sw_interface_up_down);
1064 BVT (clib_bihash) * get_mac_table (void)
1066 l2fib_main_t *mp = &l2fib_main;
1067 return &mp->mac_table;
1070 static_always_inline void *
1071 allocate_mac_evt_buf (u32 client, u32 client_index)
1073 l2fib_main_t *fm = &l2fib_main;
1074 vl_api_l2_macs_event_t *mp = vl_msg_api_alloc
1075 (sizeof (*mp) + (fm->max_macs_in_event * sizeof (vl_api_mac_entry_t)));
1076 mp->_vl_msg_id = htons (l2input_main.msg_id_base + VL_API_L2_MACS_EVENT);
1077 mp->pid = htonl (client);
1078 mp->client_index = client_index;
1082 static_always_inline f64
1083 l2fib_scan (vlib_main_t * vm, f64 start_time, u8 event_only)
1085 l2fib_main_t *fm = &l2fib_main;
1086 l2learn_main_t *lm = &l2learn_main;
1088 BVT (clib_bihash) * h = &fm->mac_table;
1090 f64 last_start = start_time;
1094 u32 learn_count = 0;
1095 u32 client = lm->client_pid;
1096 u32 cl_idx = lm->client_index;
1097 vl_api_l2_macs_event_t *mp = 0;
1098 vl_api_registration_t *reg = 0;
1100 static u32 *bd_learn_counts = 0;
1102 /* Don't scan the l2 fib if it hasn't been instantiated yet */
1103 if (alloc_arena (h) == 0)
1106 vec_reset_length (bd_learn_counts);
1107 vec_validate (bd_learn_counts, vec_len (l2input_main.bd_configs) - 1);
1111 mp = allocate_mac_evt_buf (client, cl_idx);
1112 reg = vl_api_client_index_to_registration (lm->client_index);
1115 for (i = 0; i < h->nbuckets; i++)
1117 /* allow no more than 20us without a pause */
1118 delta_t = vlib_time_now (vm) - last_start;
1119 if (delta_t > 20e-6)
1121 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
1122 /* in case a new bd was created while sleeping */
1123 vec_validate (bd_learn_counts,
1124 vec_len (l2input_main.bd_configs) - 1);
1125 last_start = vlib_time_now (vm);
1129 if (i < (h->nbuckets - 3))
1131 BVT (clib_bihash_bucket) * b =
1132 BV (clib_bihash_get_bucket) (h, i + 3);
1133 clib_prefetch_load (b);
1134 b = BV (clib_bihash_get_bucket) (h, i + 1);
1135 if (!BV (clib_bihash_bucket_is_empty) (b))
1137 BVT (clib_bihash_value) * v =
1138 BV (clib_bihash_get_value) (h, b->offset);
1139 clib_prefetch_load (v);
1143 BVT (clib_bihash_bucket) * b = BV (clib_bihash_get_bucket) (h, i);
1144 if (BV (clib_bihash_bucket_is_empty) (b))
1146 BVT (clib_bihash_value) * v = BV (clib_bihash_get_value) (h, b->offset);
1147 for (j = 0; j < (1 << b->log2_pages); j++)
1149 for (k = 0; k < BIHASH_KVP_PER_PAGE; k++)
1151 if (BV (clib_bihash_is_free) (&v->kvp[k]))
1154 l2fib_entry_key_t key = {.raw = v->kvp[k].key };
1155 l2fib_entry_result_t result = {.raw = v->kvp[k].value };
1157 if (!l2fib_entry_result_is_set_AGE_NOT (&result))
1160 vec_elt (bd_learn_counts, key.fields.bd_index)++;
1165 if (PREDICT_FALSE (evt_idx >= fm->max_macs_in_event))
1167 /* event message full, send it and start a new one */
1168 if (reg && vl_api_can_send_msg (reg))
1170 mp->n_macs = htonl (evt_idx);
1171 vl_api_send_msg (reg, (u8 *) mp);
1172 mp = allocate_mac_evt_buf (client, cl_idx);
1177 clib_warning ("MAC event to pid %d queue stuffed!"
1178 " %d MAC entries lost", client,
1184 if (l2fib_entry_result_is_set_LRN_EVT (&result))
1186 /* copy mac entry to event msg */
1187 clib_memcpy_fast (mp->mac[evt_idx].mac_addr,
1189 mp->mac[evt_idx].action =
1190 l2fib_entry_result_is_set_LRN_MOV (&result) ?
1191 (vl_api_mac_event_action_t) MAC_EVENT_ACTION_MOVE
1192 : (vl_api_mac_event_action_t) MAC_EVENT_ACTION_ADD;
1193 mp->mac[evt_idx].action =
1194 htonl (mp->mac[evt_idx].action);
1195 mp->mac[evt_idx].sw_if_index =
1196 htonl (result.fields.sw_if_index);
1197 /* clear event bits and update mac entry */
1198 l2fib_entry_result_clear_LRN_EVT (&result);
1199 l2fib_entry_result_clear_LRN_MOV (&result);
1200 BVT (clib_bihash_kv) kv;
1202 kv.value = result.raw;
1203 BV (clib_bihash_add_del) (&fm->mac_table, &kv, 1);
1205 continue; /* skip aging */
1209 if (event_only || l2fib_entry_result_is_set_AGE_NOT (&result))
1210 continue; /* skip aging - static_mac always age_not */
1212 /* start aging processing */
1213 u32 bd_index = key.fields.bd_index;
1214 u32 sw_if_index = result.fields.sw_if_index;
1215 u16 sn = l2fib_cur_seq_num (bd_index, sw_if_index);
1216 if (result.fields.sn != sn)
1217 goto age_out; /* stale mac */
1219 l2_bridge_domain_t *bd_config =
1220 vec_elt_at_index (l2input_main.bd_configs, bd_index);
1222 if (bd_config->mac_age == 0)
1223 continue; /* skip aging */
1225 i16 delta = (u8) (start_time / 60) - result.fields.timestamp;
1226 delta += delta < 0 ? 256 : 0;
1228 if (delta < bd_config->mac_age)
1229 continue; /* still valid */
1234 /* copy mac entry to event msg */
1235 clib_memcpy_fast (mp->mac[evt_idx].mac_addr, key.fields.mac,
1237 mp->mac[evt_idx].action =
1238 (vl_api_mac_event_action_t) MAC_EVENT_ACTION_DELETE;
1239 mp->mac[evt_idx].action = htonl (mp->mac[evt_idx].action);
1240 mp->mac[evt_idx].sw_if_index =
1241 htonl (result.fields.sw_if_index);
1244 /* delete mac entry */
1245 BVT (clib_bihash_kv) kv;
1247 BV (clib_bihash_add_del) (&fm->mac_table, &kv, 0);
1249 vec_elt (bd_learn_counts, key.fields.bd_index)--;
1251 * Note: we may have just freed the bucket's backing
1252 * storage, so check right here...
1254 if (BV (clib_bihash_bucket_is_empty) (b))
1263 /* keep learn count consistent */
1264 l2learn_main.global_learn_count = learn_count;
1265 vec_foreach_index (bd_index, l2input_main.bd_configs)
1267 vec_elt (l2input_main.bd_configs, bd_index).learn_count =
1268 vec_elt (bd_learn_counts, bd_index);
1273 /* send any outstanding mac event message else free message buffer */
1276 if (reg && vl_api_can_send_msg (reg))
1278 mp->n_macs = htonl (evt_idx);
1279 vl_api_send_msg (reg, (u8 *) mp);
1284 clib_warning ("MAC event to pid %d queue stuffed!"
1285 " %d MAC entries lost", client, evt_idx);
1286 vl_msg_api_free (mp);
1290 vl_msg_api_free (mp);
1292 return delta_t + accum_t;
1296 l2fib_mac_age_scanner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1299 uword event_type, *event_data = 0;
1300 l2fib_main_t *fm = &l2fib_main;
1301 l2learn_main_t *lm = &l2learn_main;
1303 f64 start_time, next_age_scan_time = CLIB_TIME_MAX;
1308 vlib_process_wait_for_event_or_clock (vm, fm->event_scan_delay);
1311 f64 t = next_age_scan_time - vlib_time_now (vm);
1312 vlib_process_wait_for_event_or_clock (vm, t);
1315 vlib_process_wait_for_event (vm);
1317 event_type = vlib_process_get_events (vm, &event_data);
1318 vec_reset_length (event_data);
1320 start_time = vlib_time_now (vm);
1322 { SCAN_MAC_AGE, SCAN_MAC_EVENT, SCAN_DISABLE } scan = SCAN_MAC_AGE;
1326 case ~0: /* timer expired */
1327 if (lm->client_pid != 0 && start_time < next_age_scan_time)
1328 scan = SCAN_MAC_EVENT;
1331 case L2_MAC_AGE_PROCESS_EVENT_START:
1335 case L2_MAC_AGE_PROCESS_EVENT_STOP:
1337 scan = SCAN_DISABLE;
1340 case L2_MAC_AGE_PROCESS_EVENT_ONE_PASS:
1347 if (scan == SCAN_MAC_EVENT)
1348 l2fib_main.evt_scan_duration = l2fib_scan (vm, start_time, 1);
1351 if (scan == SCAN_MAC_AGE)
1352 l2fib_main.age_scan_duration = l2fib_scan (vm, start_time, 0);
1353 if (scan == SCAN_DISABLE)
1355 l2fib_main.age_scan_duration = 0;
1356 l2fib_main.evt_scan_duration = 0;
1358 /* schedule next scan */
1360 next_age_scan_time = start_time + L2FIB_AGE_SCAN_INTERVAL;
1362 next_age_scan_time = CLIB_TIME_MAX;
1369 VLIB_REGISTER_NODE (l2fib_mac_age_scanner_process_node) = {
1370 .function = l2fib_mac_age_scanner_process,
1371 .type = VLIB_NODE_TYPE_PROCESS,
1372 .name = "l2fib-mac-age-scanner-process",
1377 l2fib_init (vlib_main_t * vm)
1379 l2fib_main_t *mp = &l2fib_main;
1380 l2fib_entry_key_t test_key;
1384 mp->vnet_main = vnet_get_main ();
1385 if (mp->mac_table_n_buckets == 0)
1386 mp->mac_table_n_buckets = L2FIB_NUM_BUCKETS;
1387 if (mp->mac_table_memory_size == 0)
1388 mp->mac_table_memory_size = L2FIB_MEMORY_SIZE;
1389 mp->mac_table_initialized = 0;
1391 /* verify the key constructor is good, since it is endian-sensitive */
1392 clib_memset (test_mac, 0, sizeof (test_mac));
1395 test_key.raw = l2fib_make_key ((u8 *) & test_mac, 0x1234);
1396 ASSERT (test_key.fields.mac[0] == 0x11);
1397 ASSERT (test_key.fields.bd_index == 0x1234);
1402 VLIB_INIT_FUNCTION (l2fib_init);
1404 static clib_error_t *
1405 lfib_config (vlib_main_t * vm, unformat_input_t * input)
1407 l2fib_main_t *lm = &l2fib_main;
1408 uword table_size = ~0;
1411 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1413 if (unformat (input, "table-size %U", unformat_memory_size,
1416 else if (unformat (input, "num-buckets %u", &n_buckets))
1419 return clib_error_return (0, "unknown input `%U'",
1420 format_unformat_error, input);
1423 if (n_buckets != ~0)
1425 if (!is_pow2 (n_buckets))
1426 return clib_error_return (0, "num-buckets must be power of 2");
1427 lm->mac_table_n_buckets = n_buckets;
1430 if (table_size != ~0)
1431 lm->mac_table_memory_size = table_size;
1435 VLIB_CONFIG_FUNCTION (lfib_config, "l2fib");
1438 * fd.io coding-style-patch-verification: ON
1441 * eval: (c-set-style "gnu")