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>
31 #include <vppinfra/bihash_template.c>
33 #include <vlibmemory/api.h>
34 #include <vnet/vnet_msg_enum.h>
36 #define vl_typedefs /* define message structures */
37 #include <vnet/vnet_all_api_h.h>
40 #define vl_endianfun /* define message structures */
41 #include <vnet/vnet_all_api_h.h>
46 * @brief Ethernet MAC Address FIB Table Management.
48 * The MAC Address forwarding table for bridge-domains is called the l2fib.
49 * Entries are added automatically as part of mac learning, but MAC Addresses
50 * entries can also be added manually.
54 l2fib_main_t l2fib_main;
57 format_l2fib_entry_result_flags (u8 * s, va_list * args)
59 l2fib_entry_result_flags_t flags = va_arg (*args, int);
61 if (L2FIB_ENTRY_RESULT_FLAG_NONE == flags)
63 s = format (s, "none");
68 if (flags & L2FIB_ENTRY_RESULT_FLAG_##a) \
69 s = format (s, "%s ", t); \
71 foreach_l2fib_entry_result_attr
78 incr_mac_address (u8 * mac)
80 u64 tmp = *((u64 *) mac);
81 tmp = clib_net_to_host_u64 (tmp);
82 tmp += 1 << 16; /* skip unused (least significant) octets */
83 tmp = clib_host_to_net_u64 (tmp);
85 clib_memcpy_fast (mac, &tmp, 6);
88 /** Format sw_if_index. If the value is ~0, use the text "N/A" */
90 format_vnet_sw_if_index_name_with_NA (u8 * s, va_list * args)
92 vnet_main_t *vnm = va_arg (*args, vnet_main_t *);
93 u32 sw_if_index = va_arg (*args, u32);
94 if (sw_if_index == ~0)
95 return format (s, "N/A");
97 vnet_sw_interface_t *swif =
98 vnet_get_sw_interface_or_null (vnm, sw_if_index);
100 return format (s, "Stale");
102 return format (s, "%U", format_vnet_sw_interface_name, vnm,
103 vnet_get_sw_interface_or_null (vnm, sw_if_index));
106 typedef struct l2fib_dump_walk_ctx_t_
109 l2fib_entry_key_t *l2fe_key;
110 l2fib_entry_result_t *l2fe_res;
111 } l2fib_dump_walk_ctx_t;
114 l2fib_dump_walk_cb (BVT (clib_bihash_kv) * kvp, void *arg)
116 l2fib_dump_walk_ctx_t *ctx = arg;
117 l2fib_entry_result_t result;
118 l2fib_entry_key_t key;
121 result.raw = kvp->value;
123 if ((ctx->bd_index == ~0) || (ctx->bd_index == key.fields.bd_index))
125 vec_add1 (ctx->l2fe_key, key);
126 vec_add1 (ctx->l2fe_res, result);
129 return (BIHASH_WALK_CONTINUE);
133 l2fib_table_dump (u32 bd_index,
134 l2fib_entry_key_t ** l2fe_key,
135 l2fib_entry_result_t ** l2fe_res)
137 l2fib_main_t *msm = &l2fib_main;
138 l2fib_dump_walk_ctx_t ctx = {
139 .bd_index = bd_index,
142 BV (clib_bihash_foreach_key_value_pair)
143 (&msm->mac_table, l2fib_dump_walk_cb, &ctx);
145 *l2fe_key = ctx.l2fe_key;
146 *l2fe_res = ctx.l2fe_res;
150 l2_fib_extract_seq_num (l2fib_seq_num_t sn, u8 * bd_sn, u8 * if_sn)
157 format_l2_fib_seq_num (u8 * s, va_list * a)
159 l2fib_seq_num_t sn = va_arg (*a, int);
162 l2_fib_extract_seq_num (sn, &bd_sn, &if_sn);
164 s = format (s, "%3d/%-3d", bd_sn, if_sn);
169 typedef struct l2fib_show_walk_ctx_t_
180 } l2fib_show_walk_ctx_t;
183 l2fib_show_walk_cb (BVT (clib_bihash_kv) * kvp, void *arg)
185 l2fib_show_walk_ctx_t *ctx = arg;
186 l2_bridge_domain_t *bd_config;
187 l2fib_entry_result_t result;
188 l2fib_entry_key_t key;
190 if (ctx->verbose && ctx->first_entry)
192 ctx->first_entry = 0;
193 vlib_cli_output (ctx->vm,
194 "%=19s%=7s%=7s%=8s%=9s%=7s%=7s%=5s%=30s",
195 "Mac-Address", "BD-Idx", "If-Idx",
196 "BSN-ISN", "Age(min)", "static", "filter",
197 "bvi", "Interface-Name");
201 result.raw = kvp->value;
202 ctx->total_entries++;
205 ((ctx->bd_index >> 31) || (ctx->bd_index == key.fields.bd_index)))
209 if (ctx->learn && l2fib_entry_result_is_set_AGE_NOT (&result))
210 return (BIHASH_WALK_CONTINUE); /* skip provisioned macs */
212 if (ctx->add && !l2fib_entry_result_is_set_AGE_NOT (&result))
213 return (BIHASH_WALK_CONTINUE); /* skip learned macs */
215 bd_config = vec_elt_at_index (l2input_main.bd_configs,
216 key.fields.bd_index);
218 if (l2fib_entry_result_is_set_AGE_NOT (&result))
219 s = format (s, "no");
220 else if (bd_config->mac_age == 0)
224 i16 delta = ctx->now - result.fields.timestamp;
225 delta += delta < 0 ? 256 : 0;
226 s = format (s, "%d", delta);
229 vlib_cli_output (ctx->vm,
230 "%=19U%=7d%=7d %U%=9v%=7s%=7s%=5s%=30U",
231 format_ethernet_address, key.fields.mac,
233 result.fields.sw_if_index == ~0
234 ? -1 : result.fields.sw_if_index,
235 format_l2_fib_seq_num, result.fields.sn, s,
236 l2fib_entry_result_is_set_STATIC (&result) ? "*" : "-",
237 l2fib_entry_result_is_set_FILTER (&result) ? "*" : "-",
238 l2fib_entry_result_is_set_BVI (&result) ? "*" : "-",
239 format_vnet_sw_if_index_name_with_NA,
240 ctx->vnm, result.fields.sw_if_index);
244 return (BIHASH_WALK_CONTINUE);
247 /** Display the contents of the l2fib. */
248 static clib_error_t *
249 show_l2fib (vlib_main_t * vm,
250 unformat_input_t * input, vlib_cli_command_t * cmd)
252 bd_main_t *bdm = &bd_main;
253 l2fib_main_t *msm = &l2fib_main;
256 l2fib_show_walk_ctx_t ctx = {
259 .now = (u8) (vlib_time_now (vm) / 60),
261 .vnm = msm->vnet_main,
264 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
266 if (unformat (input, "raw"))
272 else if (unformat (input, "verbose"))
274 else if (unformat (input, "all"))
276 else if (unformat (input, "bd_index %d", &ctx.bd_index))
278 else if (unformat (input, "learn"))
284 else if (unformat (input, "add"))
290 else if (unformat (input, "bd_id %d", &bd_id))
292 uword *p = hash_get (bdm->bd_index_by_bd_id, bd_id);
299 return clib_error_return (0,
300 "bridge domain id %d doesn't exist\n",
307 if (msm->mac_table_initialized == 0)
309 vlib_cli_output (vm, "no l2fib entries");
313 BV (clib_bihash_foreach_key_value_pair)
314 (&msm->mac_table, l2fib_show_walk_cb, &ctx);
316 if (ctx.total_entries == 0)
317 vlib_cli_output (vm, "no l2fib entries");
320 l2learn_main_t *lm = &l2learn_main;
321 vlib_cli_output (vm, "L2FIB total/learned entries: %d/%d "
322 "Last scan time: %.4esec Learn limit: %d ",
323 ctx.total_entries, lm->global_learn_count,
324 msm->age_scan_duration, lm->global_learn_limit);
326 vlib_cli_output (vm, "L2MAC events client PID: %d "
327 "Last e-scan time: %.4esec Delay: %.2esec "
328 "Max macs in event: %d",
329 lm->client_pid, msm->evt_scan_duration,
330 msm->event_scan_delay, msm->max_macs_in_event);
334 vlib_cli_output (vm, "Raw Hash Table:\n%U\n",
335 BV (format_bihash), &msm->mac_table, 1 /* verbose */ );
341 * This command displays the MAC Address entries of the L2 FIB table.
342 * Output can be filtered to just get the number of MAC Addresses or display
343 * each MAC Address for all bridge domains or just a single bridge domain.
346 * Example of how to display the number of MAC Address entries in the L2
348 * @cliexstart{show l2fib}
351 * Example of how to display all the MAC Address entries in the L2
353 * @cliexstart{show l2fib all}
354 * Mac Address BD Idx Interface Index static filter bvi refresh timestamp
355 * 52:54:00:53:18:33 1 GigabitEthernet0/8/0.200 3 0 0 0 0 0
356 * 52:54:00:53:18:55 1 GigabitEthernet0/8/0.200 3 1 0 0 0 0
357 * 52:54:00:53:18:77 1 N/A -1 1 1 0 0 0
362 VLIB_CLI_COMMAND (show_l2fib_cli, static) = {
363 .path = "show l2fib",
364 .short_help = "show l2fib [all] | [bd_id <nn> | bd_index <nn>] [learn | add] | [raw]",
365 .function = show_l2fib,
370 l2fib_table_init (void)
372 l2fib_main_t *mp = &l2fib_main;
374 if (mp->mac_table_initialized == 1)
377 BV (clib_bihash_init) (&mp->mac_table, "l2fib mac table",
378 mp->mac_table_n_buckets, mp->mac_table_memory_size);
379 mp->mac_table_initialized = 1;
382 /* Remove all entries from the l2fib */
384 l2fib_clear_table (void)
386 l2fib_main_t *mp = &l2fib_main;
388 if (mp->mac_table_initialized == 0)
391 /* Remove all entries */
392 BV (clib_bihash_free) (&mp->mac_table);
394 l2learn_main.global_learn_count = 0;
397 /** Clear all entries in L2FIB.
398 * @TODO: Later we may want a way to remove only the non-static entries
400 static clib_error_t *
401 clear_l2fib (vlib_main_t * vm,
402 unformat_input_t * input, vlib_cli_command_t * cmd)
404 l2fib_clear_table ();
409 * This command clears all the MAC Address entries from the L2 FIB table.
412 * Example of how to clear the L2 FIB Table:
413 * @cliexcmd{clear l2fib}
414 * Example to show the L2 FIB Table has been cleared:
415 * @cliexstart{show l2fib verbose}
420 VLIB_CLI_COMMAND (clear_l2fib_cli, static) = {
421 .path = "clear l2fib",
422 .short_help = "clear l2fib",
423 .function = clear_l2fib,
427 static l2fib_seq_num_t
428 l2fib_cur_seq_num (u32 bd_index, u32 sw_if_index)
430 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);
432 return l2_fib_mk_seq_num (bd_config->seq_num,
433 l2_input_seq_num (sw_if_index));
437 * Add an entry to the l2fib.
438 * If the entry already exists then overwrite it
441 l2fib_add_entry (const u8 * mac, u32 bd_index,
442 u32 sw_if_index, l2fib_entry_result_flags_t flags)
444 l2fib_entry_key_t key;
445 l2fib_entry_result_t result;
446 __attribute__ ((unused)) u32 bucket_contents;
447 l2fib_main_t *fm = &l2fib_main;
448 l2learn_main_t *lm = &l2learn_main;
449 BVT (clib_bihash_kv) kv;
451 if (fm->mac_table_initialized == 0)
455 key.raw = l2fib_make_key (mac, bd_index);
458 /* check if entry already exist */
459 if (BV (clib_bihash_search) (&fm->mac_table, &kv, &kv))
461 /* decrement counter if overwriting a learned mac */
462 result.raw = kv.value;
463 if ((!l2fib_entry_result_is_set_AGE_NOT (&result))
464 && (lm->global_learn_count))
465 lm->global_learn_count--;
469 result.raw = 0; /* clear all fields */
470 result.fields.sw_if_index = sw_if_index;
471 result.fields.flags = flags;
473 /* no aging for provisioned entry */
474 l2fib_entry_result_set_AGE_NOT (&result);
476 kv.value = result.raw;
478 BV (clib_bihash_add_del) (&fm->mac_table, &kv, 1 /* is_add */ );
482 * Add an entry to the L2FIB.
484 * l2fib add <mac> <bd> <intf> [static] [bvi]
485 * l2fib add <mac> <bd> filter
486 * Note that filter and bvi entries are always static
488 static clib_error_t *
489 l2fib_add (vlib_main_t * vm,
490 unformat_input_t * input, vlib_cli_command_t * cmd)
492 bd_main_t *bdm = &bd_main;
493 vnet_main_t *vnm = vnet_get_main ();
494 clib_error_t *error = 0;
498 u32 sw_if_index = ~0;
500 l2fib_entry_result_flags_t flags;
502 flags = L2FIB_ENTRY_RESULT_FLAG_NONE;
504 if (!unformat (input, "%U", unformat_ethernet_address, mac))
506 error = clib_error_return (0, "expected mac address `%U'",
507 format_unformat_error, input);
511 if (!unformat (input, "%d", &bd_id))
513 error = clib_error_return (0, "expected bridge domain ID `%U'",
514 format_unformat_error, input);
518 p = hash_get (bdm->bd_index_by_bd_id, bd_id);
521 error = clib_error_return (0, "bridge domain ID %d invalid", bd_id);
526 if (unformat (input, "filter"))
528 l2fib_add_filter_entry (mac, bd_index);
532 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
534 error = clib_error_return (0, "unknown interface `%U'",
535 format_unformat_error, input);
539 if (unformat (input, "static"))
540 flags |= L2FIB_ENTRY_RESULT_FLAG_STATIC;
541 else if (unformat (input, "bvi"))
542 flags |= (L2FIB_ENTRY_RESULT_FLAG_STATIC | L2FIB_ENTRY_RESULT_FLAG_BVI);
544 if (vec_len (l2input_main.configs) <= sw_if_index)
546 error = clib_error_return (0, "Interface sw_if_index %d not in L2 mode",
551 l2fib_add_entry (mac, bd_index, sw_if_index, flags);
558 * This command adds a MAC Address entry to the L2 FIB table
559 * of an existing bridge-domain. The MAC Address can be static
560 * or dynamic. This command also allows a filter to be added,
561 * such that packets with given MAC Addresses (source mac or
562 * destination mac match) are dropped.
565 * Example of how to add a dynamic MAC Address entry to the L2 FIB table
566 * of a bridge-domain (where 200 is the bridge-domain-id):
567 * @cliexcmd{l2fib add 52:54:00:53:18:33 200 GigabitEthernet0/8/0.200}
568 * Example of how to add a static MAC Address entry to the L2 FIB table
569 * of a bridge-domain (where 200 is the bridge-domain-id):
570 * @cliexcmd{l2fib add 52:54:00:53:18:55 200 GigabitEthernet0/8/0.200 static}
571 * Example of how to add a filter such that a packet with the given MAC
572 * Address will be dropped in a given bridge-domain (where 200 is the
574 * @cliexcmd{l2fib add 52:54:00:53:18:77 200 filter}
575 * Example of show command of the provisioned MAC Addresses and filters:
576 * @cliexstart{show l2fib verbose}
577 * Mac Address BD Idx Interface Index static filter bvi refresh timestamp
578 * 52:54:00:53:18:33 1 GigabitEthernet0/8/0.200 3 0 0 0 0 0
579 * 52:54:00:53:18:55 1 GigabitEthernet0/8/0.200 3 1 0 0 0 0
580 * 52:54:00:53:18:77 1 N/A -1 1 1 0 0 0
585 VLIB_CLI_COMMAND (l2fib_add_cli, static) = {
587 .short_help = "l2fib add <mac> <bridge-domain-id> filter | <intf> [static | bvi]",
588 .function = l2fib_add,
593 static clib_error_t *
594 l2fib_test_command_fn (vlib_main_t * vm,
595 unformat_input_t * input, vlib_cli_command_t * cmd)
597 u8 mac[6], save_mac[6];
607 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
609 if (unformat (input, "mac %U", unformat_ethernet_address, mac))
611 else if (unformat (input, "add"))
613 else if (unformat (input, "del"))
615 else if (unformat (input, "check"))
617 else if (unformat (input, "count %d", &count))
624 return clib_error_return (0, "mac not set");
626 if (is_add == 0 && is_del == 0 && is_check == 0)
627 return clib_error_return (0,
628 "noop: pick at least one of (add,del,check)");
630 clib_memcpy_fast (save_mac, mac, 6);
634 for (i = 0; i < count; i++)
636 l2fib_add_entry (mac, bd_index, sw_if_index,
637 L2FIB_ENTRY_RESULT_FLAG_NONE);
638 incr_mac_address (mac);
644 BVT (clib_bihash_kv) kv;
645 l2fib_main_t *mp = &l2fib_main;
647 if (mp->mac_table_initialized == 0)
648 return clib_error_return (0, "mac table is not initialized");
650 clib_memcpy_fast (mac, save_mac, 6);
652 for (i = 0; i < count; i++)
654 kv.key = l2fib_make_key (mac, bd_index);
655 if (BV (clib_bihash_search) (&mp->mac_table, &kv, &kv))
657 clib_warning ("key %U AWOL", format_ethernet_address, mac);
660 incr_mac_address (mac);
666 clib_memcpy_fast (mac, save_mac, 6);
668 for (i = 0; i < count; i++)
670 l2fib_del_entry (mac, bd_index, 0);
671 incr_mac_address (mac);
679 * The set of '<em>test l2fib</em>' commands allow the L2 FIB table of the default
680 * bridge domain (bridge-domain-id of 0) to be modified.
684 * Example of how to add a set of 4 sequential MAC Address entries to L2
685 * FIB table of the default bridge-domain:
686 * @cliexcmd{test l2fib add mac 52:54:00:53:00:00 count 4}
688 * Show the set of 4 sequential MAC Address entries that were added:
689 * @cliexstart{show l2fib verbose}
690 * Mac Address BD Idx Interface Index static filter bvi refresh timestamp
691 * 52:54:00:53:00:00 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
692 * 52:54:00:53:00:01 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
693 * 52:54:00:53:00:03 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
694 * 52:54:00:53:00:02 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
698 * Example of how to check that the set of 4 sequential MAC Address
699 * entries were added to L2 FIB table of the default
700 * bridge-domain. Used a count of 5 to produce an error:
702 * @cliexcmd{test l2fib check mac 52:54:00:53:00:00 count 5}
703 * The output of the check command is in the log files. Log file
704 * location may vary based on your OS and Version:
706 * <b><em># tail -f /var/log/messages | grep l2fib_test_command_fn</em></b>
708 * Sep 7 17:15:24 localhost vnet[4952]: l2fib_test_command_fn:446: key 52:54:00:53:00:04 AWOL
710 * Example of how to delete a set of 4 sequential MAC Address entries
711 * from L2 FIB table of the default bridge-domain:
712 * @cliexcmd{test l2fib del mac 52:54:00:53:00:00 count 4}
716 VLIB_CLI_COMMAND (l2fib_test_command, static) = {
717 .path = "test l2fib",
718 .short_help = "test l2fib [add|del|check] mac <base-addr> count <nn>",
719 .function = l2fib_test_command_fn,
725 * Delete an entry from the l2fib.
726 * Return 0 if the entry was deleted, or 1 it was not found or if
727 * sw_if_index is non-zero and does not match that in the entry.
730 l2fib_del_entry (const u8 * mac, u32 bd_index, u32 sw_if_index)
732 l2fib_entry_result_t result;
733 l2fib_main_t *mp = &l2fib_main;
734 BVT (clib_bihash_kv) kv;
736 if (mp->mac_table_initialized == 0)
740 kv.key = l2fib_make_key (mac, bd_index);
742 if (BV (clib_bihash_search) (&mp->mac_table, &kv, &kv))
745 result.raw = kv.value;
747 /* check if sw_if_index of entry match */
748 if ((sw_if_index != 0) && (sw_if_index != result.fields.sw_if_index))
751 /* decrement counter if dynamically learned mac */
752 if ((!l2fib_entry_result_is_set_AGE_NOT (&result)) &&
753 (l2learn_main.global_learn_count))
754 l2learn_main.global_learn_count--;
756 /* Remove entry from hash table */
757 BV (clib_bihash_add_del) (&mp->mac_table, &kv, 0 /* is_add */ );
762 * Delete an entry from the L2FIB.
764 * l2fib del <mac> <bd-id>
766 static clib_error_t *
767 l2fib_del (vlib_main_t * vm,
768 unformat_input_t * input, vlib_cli_command_t * cmd)
770 bd_main_t *bdm = &bd_main;
771 clib_error_t *error = 0;
777 if (!unformat (input, "%U", unformat_ethernet_address, mac))
779 error = clib_error_return (0, "expected mac address `%U'",
780 format_unformat_error, input);
784 if (!unformat (input, "%d", &bd_id))
786 error = clib_error_return (0, "expected bridge domain ID `%U'",
787 format_unformat_error, input);
791 p = hash_get (bdm->bd_index_by_bd_id, bd_id);
794 error = clib_error_return (0, "bridge domain ID %d invalid", bd_id);
799 /* Delete the entry */
800 if (l2fib_del_entry (mac, bd_index, 0))
802 error = clib_error_return (0, "mac entry not found");
811 * This command deletes an existing MAC Address entry from the L2 FIB
812 * table of an existing bridge-domain.
815 * 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):
816 * @cliexcmd{l2fib del 52:54:00:53:18:33 200}
819 VLIB_CLI_COMMAND (l2fib_del_cli, static) = {
821 .short_help = "l2fib del <mac> <bridge-domain-id> []",
822 .function = l2fib_del,
827 Kick off ager to scan MACs to age/delete MAC entries
830 l2fib_start_ager_scan (vlib_main_t * vm)
832 uword evt = L2_MAC_AGE_PROCESS_EVENT_ONE_PASS;
834 /* check if there is at least one bd with mac aging enabled */
835 l2_bridge_domain_t *bd_config;
836 vec_foreach (bd_config, l2input_main.bd_configs)
838 if (bd_config->bd_id != ~0 && bd_config->mac_age != 0)
840 evt = L2_MAC_AGE_PROCESS_EVENT_START;
845 vlib_process_signal_event (vm, l2fib_mac_age_scanner_process_node.index,
850 Flush all non static MACs from an interface
853 l2fib_flush_int_mac (vlib_main_t * vm, u32 sw_if_index)
855 l2_input_seq_num_inc (sw_if_index);
856 l2fib_start_ager_scan (vm);
860 Flush all non static MACs in a bridge domain
863 l2fib_flush_bd_mac (vlib_main_t * vm, u32 bd_index)
865 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);
866 bd_config->seq_num += 1;
867 l2fib_start_ager_scan (vm);
871 Flush all non static MACs - flushes all valid BDs
874 l2fib_flush_all_mac (vlib_main_t * vm)
876 l2_bridge_domain_t *bd_config;
877 vec_foreach (bd_config, l2input_main.bd_configs)
878 if (bd_is_valid (bd_config))
879 bd_config->seq_num += 1;
881 l2fib_start_ager_scan (vm);
886 Flush MACs, except static ones, associated with an interface
888 l2fib flush-mac interface <if-name>
890 static clib_error_t *
891 l2fib_flush_mac_int (vlib_main_t * vm,
892 unformat_input_t * input, vlib_cli_command_t * cmd)
894 vnet_main_t *vnm = vnet_get_main ();
895 clib_error_t *error = 0;
898 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
900 error = clib_error_return (0, "unknown interface `%U'",
901 format_unformat_error, input);
905 l2fib_flush_int_mac (vm, sw_if_index);
912 Flush all MACs, except static ones
916 static clib_error_t *
917 l2fib_flush_mac_all (vlib_main_t * vm,
918 unformat_input_t * input, vlib_cli_command_t * cmd)
920 l2fib_flush_all_mac (vm);
925 * This command kick off ager to delete all existing MAC Address entries,
926 * except static ones, associated with an interface from the L2 FIB table.
929 * Example of how to flush MAC Address entries learned on an interface from the L2 FIB table:
930 * @cliexcmd{l2fib flush-mac interface GigabitEthernet2/1/0}
933 VLIB_CLI_COMMAND (l2fib_flush_mac_all_cli, static) = {
934 .path = "l2fib flush-mac all",
935 .short_help = "l2fib flush-mac all",
936 .function = l2fib_flush_mac_all,
941 * This command kick off ager to delete all existing MAC Address entries,
942 * except static ones, associated with an interface from the L2 FIB table.
945 * Example of how to flush MAC Address entries learned on an interface from the L2 FIB table:
946 * @cliexcmd{l2fib flush-mac interface GigabitEthernet2/1/0}
949 VLIB_CLI_COMMAND (l2fib_flush_mac_int_cli, static) = {
950 .path = "l2fib flush-mac interface",
951 .short_help = "l2fib flush-mac interface <if-name>",
952 .function = l2fib_flush_mac_int,
957 Flush bridge-domain MACs except static ones.
959 l2fib flush-mac bridge-domain <bd-id>
961 static clib_error_t *
962 l2fib_flush_mac_bd (vlib_main_t * vm,
963 unformat_input_t * input, vlib_cli_command_t * cmd)
965 bd_main_t *bdm = &bd_main;
966 clib_error_t *error = 0;
970 if (!unformat (input, "%d", &bd_id))
972 error = clib_error_return (0, "expecting bridge-domain id but got `%U'",
973 format_unformat_error, input);
977 p = hash_get (bdm->bd_index_by_bd_id, bd_id);
981 return clib_error_return (0, "No such bridge domain %d", bd_id);
983 l2fib_flush_bd_mac (vm, bd_index);
990 * This command kick off ager to delete all existing MAC Address entries,
991 * except static ones, in a bridge domain from the L2 FIB table.
994 * Example of how to flush MAC Address entries learned in a bridge domain from the L2 FIB table:
995 * @cliexcmd{l2fib flush-mac bridge-domain 1000}
998 VLIB_CLI_COMMAND (l2fib_flush_mac_bd_cli, static) = {
999 .path = "l2fib flush-mac bridge-domain",
1000 .short_help = "l2fib flush-mac bridge-domain <bd-id>",
1001 .function = l2fib_flush_mac_bd,
1006 l2fib_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
1008 l2_input_config_t *config = l2input_intf_config (sw_if_index);
1009 if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0 &&
1010 l2_input_is_bridge (config))
1011 l2fib_flush_int_mac (vnm->vlib_main, sw_if_index);
1015 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (l2fib_sw_interface_up_down);
1017 BVT (clib_bihash) * get_mac_table (void)
1019 l2fib_main_t *mp = &l2fib_main;
1020 return &mp->mac_table;
1023 static_always_inline void *
1024 allocate_mac_evt_buf (u32 client, u32 client_index)
1026 l2fib_main_t *fm = &l2fib_main;
1027 vl_api_l2_macs_event_t *mp = vl_msg_api_alloc
1028 (sizeof (*mp) + (fm->max_macs_in_event * sizeof (vl_api_mac_entry_t)));
1029 mp->_vl_msg_id = htons (VL_API_L2_MACS_EVENT);
1030 mp->pid = htonl (client);
1031 mp->client_index = client_index;
1035 static_always_inline f64
1036 l2fib_scan (vlib_main_t * vm, f64 start_time, u8 event_only)
1038 l2fib_main_t *fm = &l2fib_main;
1039 l2learn_main_t *lm = &l2learn_main;
1041 BVT (clib_bihash) * h = &fm->mac_table;
1043 f64 last_start = start_time;
1047 u32 learn_count = 0;
1048 u32 client = lm->client_pid;
1049 u32 cl_idx = lm->client_index;
1050 vl_api_l2_macs_event_t *mp = 0;
1051 vl_api_registration_t *reg = 0;
1053 /* Don't scan the l2 fib if it hasn't been instantiated yet */
1054 if (alloc_arena (h) == 0)
1059 mp = allocate_mac_evt_buf (client, cl_idx);
1060 reg = vl_api_client_index_to_registration (lm->client_index);
1063 for (i = 0; i < h->nbuckets; i++)
1065 /* allow no more than 20us without a pause */
1066 delta_t = vlib_time_now (vm) - last_start;
1067 if (delta_t > 20e-6)
1069 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
1070 last_start = vlib_time_now (vm);
1074 if (i < (h->nbuckets - 3))
1076 BVT (clib_bihash_bucket) * b =
1077 BV (clib_bihash_get_bucket) (h, i + 3);
1078 CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
1079 b = BV (clib_bihash_get_bucket) (h, i + 1);
1080 if (!BV (clib_bihash_bucket_is_empty) (b))
1082 BVT (clib_bihash_value) * v =
1083 BV (clib_bihash_get_value) (h, b->offset);
1084 CLIB_PREFETCH (v, CLIB_CACHE_LINE_BYTES, LOAD);
1088 BVT (clib_bihash_bucket) * b = BV (clib_bihash_get_bucket) (h, i);
1089 if (BV (clib_bihash_bucket_is_empty) (b))
1091 BVT (clib_bihash_value) * v = BV (clib_bihash_get_value) (h, b->offset);
1092 for (j = 0; j < (1 << b->log2_pages); j++)
1094 for (k = 0; k < BIHASH_KVP_PER_PAGE; k++)
1096 if (v->kvp[k].key == ~0ULL && v->kvp[k].value == ~0ULL)
1099 l2fib_entry_key_t key = {.raw = v->kvp[k].key };
1100 l2fib_entry_result_t result = {.raw = v->kvp[k].value };
1102 if (!l2fib_entry_result_is_set_AGE_NOT (&result))
1107 if (PREDICT_FALSE (evt_idx >= fm->max_macs_in_event))
1109 /* event message full, send it and start a new one */
1110 if (reg && vl_api_can_send_msg (reg))
1112 mp->n_macs = htonl (evt_idx);
1113 vl_api_send_msg (reg, (u8 *) mp);
1114 mp = allocate_mac_evt_buf (client, cl_idx);
1119 clib_warning ("MAC event to pid %d queue stuffed!"
1120 " %d MAC entries lost", client,
1126 if (l2fib_entry_result_is_set_LRN_EVT (&result))
1128 /* copy mac entry to event msg */
1129 clib_memcpy_fast (mp->mac[evt_idx].mac_addr,
1131 mp->mac[evt_idx].action =
1132 l2fib_entry_result_is_set_LRN_MOV (&result) ?
1133 (vl_api_mac_event_action_t) MAC_EVENT_ACTION_MOVE
1134 : (vl_api_mac_event_action_t) MAC_EVENT_ACTION_ADD;
1135 mp->mac[evt_idx].action =
1136 htonl (mp->mac[evt_idx].action);
1137 mp->mac[evt_idx].sw_if_index =
1138 htonl (result.fields.sw_if_index);
1139 /* clear event bits and update mac entry */
1140 l2fib_entry_result_clear_LRN_EVT (&result);
1141 l2fib_entry_result_clear_LRN_MOV (&result);
1142 BVT (clib_bihash_kv) kv;
1144 kv.value = result.raw;
1145 BV (clib_bihash_add_del) (&fm->mac_table, &kv, 1);
1147 continue; /* skip aging */
1151 if (event_only || l2fib_entry_result_is_set_AGE_NOT (&result))
1152 continue; /* skip aging - static_mac always age_not */
1154 /* start aging processing */
1155 u32 bd_index = key.fields.bd_index;
1156 u32 sw_if_index = result.fields.sw_if_index;
1157 u16 sn = l2fib_cur_seq_num (bd_index, sw_if_index);
1158 if (result.fields.sn != sn)
1159 goto age_out; /* stale mac */
1161 l2_bridge_domain_t *bd_config =
1162 vec_elt_at_index (l2input_main.bd_configs, bd_index);
1164 if (bd_config->mac_age == 0)
1165 continue; /* skip aging */
1167 i16 delta = (u8) (start_time / 60) - result.fields.timestamp;
1168 delta += delta < 0 ? 256 : 0;
1170 if (delta < bd_config->mac_age)
1171 continue; /* still valid */
1176 /* copy mac entry to event msg */
1177 clib_memcpy_fast (mp->mac[evt_idx].mac_addr, key.fields.mac,
1179 mp->mac[evt_idx].action =
1180 (vl_api_mac_event_action_t) MAC_EVENT_ACTION_DELETE;
1181 mp->mac[evt_idx].action = htonl (mp->mac[evt_idx].action);
1182 mp->mac[evt_idx].sw_if_index =
1183 htonl (result.fields.sw_if_index);
1186 /* delete mac entry */
1187 BVT (clib_bihash_kv) kv;
1189 BV (clib_bihash_add_del) (&fm->mac_table, &kv, 0);
1192 * Note: we may have just freed the bucket's backing
1193 * storage, so check right here...
1195 if (BV (clib_bihash_bucket_is_empty) (b))
1204 /* keep learn count consistent */
1205 l2learn_main.global_learn_count = learn_count;
1209 /* send any outstanding mac event message else free message buffer */
1212 if (reg && vl_api_can_send_msg (reg))
1214 mp->n_macs = htonl (evt_idx);
1215 vl_api_send_msg (reg, (u8 *) mp);
1220 clib_warning ("MAC event to pid %d queue stuffed!"
1221 " %d MAC entries lost", client, evt_idx);
1222 vl_msg_api_free (mp);
1226 vl_msg_api_free (mp);
1228 return delta_t + accum_t;
1232 l2fib_mac_age_scanner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1235 uword event_type, *event_data = 0;
1236 l2fib_main_t *fm = &l2fib_main;
1237 l2learn_main_t *lm = &l2learn_main;
1239 f64 start_time, next_age_scan_time = CLIB_TIME_MAX;
1244 vlib_process_wait_for_event_or_clock (vm, fm->event_scan_delay);
1247 f64 t = next_age_scan_time - vlib_time_now (vm);
1248 vlib_process_wait_for_event_or_clock (vm, t);
1251 vlib_process_wait_for_event (vm);
1253 event_type = vlib_process_get_events (vm, &event_data);
1254 vec_reset_length (event_data);
1256 start_time = vlib_time_now (vm);
1258 { SCAN_MAC_AGE, SCAN_MAC_EVENT, SCAN_DISABLE } scan = SCAN_MAC_AGE;
1262 case ~0: /* timer expired */
1263 if (lm->client_pid != 0 && start_time < next_age_scan_time)
1264 scan = SCAN_MAC_EVENT;
1267 case L2_MAC_AGE_PROCESS_EVENT_START:
1271 case L2_MAC_AGE_PROCESS_EVENT_STOP:
1273 scan = SCAN_DISABLE;
1276 case L2_MAC_AGE_PROCESS_EVENT_ONE_PASS:
1283 if (scan == SCAN_MAC_EVENT)
1284 l2fib_main.evt_scan_duration = l2fib_scan (vm, start_time, 1);
1287 if (scan == SCAN_MAC_AGE)
1288 l2fib_main.age_scan_duration = l2fib_scan (vm, start_time, 0);
1289 if (scan == SCAN_DISABLE)
1291 l2fib_main.age_scan_duration = 0;
1292 l2fib_main.evt_scan_duration = 0;
1294 /* schedule next scan */
1296 next_age_scan_time = start_time + L2FIB_AGE_SCAN_INTERVAL;
1298 next_age_scan_time = CLIB_TIME_MAX;
1305 VLIB_REGISTER_NODE (l2fib_mac_age_scanner_process_node) = {
1306 .function = l2fib_mac_age_scanner_process,
1307 .type = VLIB_NODE_TYPE_PROCESS,
1308 .name = "l2fib-mac-age-scanner-process",
1313 l2fib_init (vlib_main_t * vm)
1315 l2fib_main_t *mp = &l2fib_main;
1316 l2fib_entry_key_t test_key;
1320 mp->vnet_main = vnet_get_main ();
1321 if (mp->mac_table_n_buckets == 0)
1322 mp->mac_table_n_buckets = L2FIB_NUM_BUCKETS;
1323 if (mp->mac_table_memory_size == 0)
1324 mp->mac_table_memory_size = L2FIB_MEMORY_SIZE;
1325 mp->mac_table_initialized = 0;
1327 /* verify the key constructor is good, since it is endian-sensitive */
1328 clib_memset (test_mac, 0, sizeof (test_mac));
1331 test_key.raw = l2fib_make_key ((u8 *) & test_mac, 0x1234);
1332 ASSERT (test_key.fields.mac[0] == 0x11);
1333 ASSERT (test_key.fields.bd_index == 0x1234);
1338 VLIB_INIT_FUNCTION (l2fib_init);
1340 static clib_error_t *
1341 lfib_config (vlib_main_t * vm, unformat_input_t * input)
1343 l2fib_main_t *lm = &l2fib_main;
1344 uword table_size = ~0;
1347 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1349 if (unformat (input, "table-size %U", unformat_memory_size,
1352 else if (unformat (input, "num-buckets %u", &n_buckets))
1355 return clib_error_return (0, "unknown input `%U'",
1356 format_unformat_error, input);
1359 if (n_buckets != ~0)
1361 if (!is_pow2 (n_buckets))
1362 return clib_error_return (0, "num-buckets must be power of 2");
1363 lm->mac_table_n_buckets = n_buckets;
1366 if (table_size != ~0)
1367 lm->mac_table_memory_size = table_size;
1371 VLIB_CONFIG_FUNCTION (lfib_config, "l2fib");
1374 * fd.io coding-style-patch-verification: ON
1377 * eval: (c-set-style "gnu")