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 mp->mac_table_initialized = 0;
393 /* Remove all entries */
394 BV (clib_bihash_free) (&mp->mac_table);
396 l2learn_main.global_learn_count = 0;
399 /** Clear all entries in L2FIB.
400 * @TODO: Later we may want a way to remove only the non-static entries
402 static clib_error_t *
403 clear_l2fib (vlib_main_t * vm,
404 unformat_input_t * input, vlib_cli_command_t * cmd)
406 l2fib_clear_table ();
411 * This command clears all the MAC Address entries from the L2 FIB table.
414 * Example of how to clear the L2 FIB Table:
415 * @cliexcmd{clear l2fib}
416 * Example to show the L2 FIB Table has been cleared:
417 * @cliexstart{show l2fib verbose}
422 VLIB_CLI_COMMAND (clear_l2fib_cli, static) = {
423 .path = "clear l2fib",
424 .short_help = "clear l2fib",
425 .function = clear_l2fib,
429 static l2fib_seq_num_t
430 l2fib_cur_seq_num (u32 bd_index, u32 sw_if_index)
432 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);
434 return l2_fib_mk_seq_num (bd_config->seq_num,
435 l2_input_seq_num (sw_if_index));
439 * Add an entry to the l2fib.
440 * If the entry already exists then overwrite it
443 l2fib_add_entry (const u8 * mac, u32 bd_index,
444 u32 sw_if_index, l2fib_entry_result_flags_t flags)
446 l2fib_entry_key_t key;
447 l2fib_entry_result_t result;
448 __attribute__ ((unused)) u32 bucket_contents;
449 l2fib_main_t *fm = &l2fib_main;
450 l2learn_main_t *lm = &l2learn_main;
451 BVT (clib_bihash_kv) kv;
453 if (fm->mac_table_initialized == 0)
457 key.raw = l2fib_make_key (mac, bd_index);
460 /* check if entry already exist */
461 if (BV (clib_bihash_search) (&fm->mac_table, &kv, &kv))
463 /* decrement counter if overwriting a learned mac */
464 result.raw = kv.value;
465 if ((!l2fib_entry_result_is_set_AGE_NOT (&result))
466 && (lm->global_learn_count))
467 lm->global_learn_count--;
471 result.raw = 0; /* clear all fields */
472 result.fields.sw_if_index = sw_if_index;
473 result.fields.flags = flags;
475 /* no aging for provisioned entry */
476 l2fib_entry_result_set_AGE_NOT (&result);
478 kv.value = result.raw;
480 BV (clib_bihash_add_del) (&fm->mac_table, &kv, 1 /* is_add */ );
484 * Add an entry to the L2FIB.
486 * l2fib add <mac> <bd> <intf> [static] [bvi]
487 * l2fib add <mac> <bd> filter
488 * Note that filter and bvi entries are always static
490 static clib_error_t *
491 l2fib_add (vlib_main_t * vm,
492 unformat_input_t * input, vlib_cli_command_t * cmd)
494 bd_main_t *bdm = &bd_main;
495 vnet_main_t *vnm = vnet_get_main ();
496 clib_error_t *error = 0;
500 u32 sw_if_index = ~0;
502 l2fib_entry_result_flags_t flags;
504 flags = L2FIB_ENTRY_RESULT_FLAG_NONE;
506 if (!unformat (input, "%U", unformat_ethernet_address, mac))
508 error = clib_error_return (0, "expected mac address `%U'",
509 format_unformat_error, input);
513 if (!unformat (input, "%d", &bd_id))
515 error = clib_error_return (0, "expected bridge domain ID `%U'",
516 format_unformat_error, input);
520 p = hash_get (bdm->bd_index_by_bd_id, bd_id);
523 error = clib_error_return (0, "bridge domain ID %d invalid", bd_id);
528 if (unformat (input, "filter"))
530 l2fib_add_filter_entry (mac, bd_index);
534 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
536 error = clib_error_return (0, "unknown interface `%U'",
537 format_unformat_error, input);
541 if (unformat (input, "static"))
542 flags |= L2FIB_ENTRY_RESULT_FLAG_STATIC;
543 else if (unformat (input, "bvi"))
544 flags |= (L2FIB_ENTRY_RESULT_FLAG_STATIC | L2FIB_ENTRY_RESULT_FLAG_BVI);
546 if (vec_len (l2input_main.configs) <= sw_if_index)
548 error = clib_error_return (0, "Interface sw_if_index %d not in L2 mode",
553 l2fib_add_entry (mac, bd_index, sw_if_index, flags);
560 * This command adds a MAC Address entry to the L2 FIB table
561 * of an existing bridge-domain. The MAC Address can be static
562 * or dynamic. This command also allows a filter to be added,
563 * such that packets with given MAC Addresses (source mac or
564 * destination mac match) are dropped.
567 * Example of how to add a dynamic MAC Address entry to the L2 FIB table
568 * of a bridge-domain (where 200 is the bridge-domain-id):
569 * @cliexcmd{l2fib add 52:54:00:53:18:33 200 GigabitEthernet0/8/0.200}
570 * Example of how to add a static MAC Address entry to the L2 FIB table
571 * of a bridge-domain (where 200 is the bridge-domain-id):
572 * @cliexcmd{l2fib add 52:54:00:53:18:55 200 GigabitEthernet0/8/0.200 static}
573 * Example of how to add a filter such that a packet with the given MAC
574 * Address will be dropped in a given bridge-domain (where 200 is the
576 * @cliexcmd{l2fib add 52:54:00:53:18:77 200 filter}
577 * Example of show command of the provisioned MAC Addresses and filters:
578 * @cliexstart{show l2fib verbose}
579 * Mac Address BD Idx Interface Index static filter bvi refresh timestamp
580 * 52:54:00:53:18:33 1 GigabitEthernet0/8/0.200 3 0 0 0 0 0
581 * 52:54:00:53:18:55 1 GigabitEthernet0/8/0.200 3 1 0 0 0 0
582 * 52:54:00:53:18:77 1 N/A -1 1 1 0 0 0
587 VLIB_CLI_COMMAND (l2fib_add_cli, static) = {
589 .short_help = "l2fib add <mac> <bridge-domain-id> filter | <intf> [static | bvi]",
590 .function = l2fib_add,
595 static clib_error_t *
596 l2fib_test_command_fn (vlib_main_t * vm,
597 unformat_input_t * input, vlib_cli_command_t * cmd)
599 u8 mac[6], save_mac[6];
609 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
611 if (unformat (input, "mac %U", unformat_ethernet_address, mac))
613 else if (unformat (input, "add"))
615 else if (unformat (input, "del"))
617 else if (unformat (input, "check"))
619 else if (unformat (input, "count %d", &count))
626 return clib_error_return (0, "mac not set");
628 if (is_add == 0 && is_del == 0 && is_check == 0)
629 return clib_error_return (0,
630 "noop: pick at least one of (add,del,check)");
632 clib_memcpy_fast (save_mac, mac, 6);
636 for (i = 0; i < count; i++)
638 l2fib_add_entry (mac, bd_index, sw_if_index,
639 L2FIB_ENTRY_RESULT_FLAG_NONE);
640 incr_mac_address (mac);
646 BVT (clib_bihash_kv) kv;
647 l2fib_main_t *mp = &l2fib_main;
649 if (mp->mac_table_initialized == 0)
650 return clib_error_return (0, "mac table is not initialized");
652 clib_memcpy_fast (mac, save_mac, 6);
654 for (i = 0; i < count; i++)
656 kv.key = l2fib_make_key (mac, bd_index);
657 if (BV (clib_bihash_search) (&mp->mac_table, &kv, &kv))
659 clib_warning ("key %U AWOL", format_ethernet_address, mac);
662 incr_mac_address (mac);
668 clib_memcpy_fast (mac, save_mac, 6);
670 for (i = 0; i < count; i++)
672 l2fib_del_entry (mac, bd_index, 0);
673 incr_mac_address (mac);
681 * The set of '<em>test l2fib</em>' commands allow the L2 FIB table of the default
682 * bridge domain (bridge-domain-id of 0) to be modified.
686 * Example of how to add a set of 4 sequential MAC Address entries to L2
687 * FIB table of the default bridge-domain:
688 * @cliexcmd{test l2fib add mac 52:54:00:53:00:00 count 4}
690 * Show the set of 4 sequential MAC Address entries that were added:
691 * @cliexstart{show l2fib verbose}
692 * Mac Address BD Idx Interface Index static filter bvi refresh timestamp
693 * 52:54:00:53:00:00 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
694 * 52:54:00:53:00:01 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
695 * 52:54:00:53:00:03 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
696 * 52:54:00:53:00:02 0 GigabitEthernet0/8/0.300 8 0 0 0 0 0
700 * Example of how to check that the set of 4 sequential MAC Address
701 * entries were added to L2 FIB table of the default
702 * bridge-domain. Used a count of 5 to produce an error:
704 * @cliexcmd{test l2fib check mac 52:54:00:53:00:00 count 5}
705 * The output of the check command is in the log files. Log file
706 * location may vary based on your OS and Version:
708 * <b><em># tail -f /var/log/messages | grep l2fib_test_command_fn</em></b>
710 * Sep 7 17:15:24 localhost vnet[4952]: l2fib_test_command_fn:446: key 52:54:00:53:00:04 AWOL
712 * Example of how to delete a set of 4 sequential MAC Address entries
713 * from L2 FIB table of the default bridge-domain:
714 * @cliexcmd{test l2fib del mac 52:54:00:53:00:00 count 4}
718 VLIB_CLI_COMMAND (l2fib_test_command, static) = {
719 .path = "test l2fib",
720 .short_help = "test l2fib [add|del|check] mac <base-addr> count <nn>",
721 .function = l2fib_test_command_fn,
727 * Delete an entry from the l2fib.
728 * Return 0 if the entry was deleted, or 1 it was not found or if
729 * sw_if_index is non-zero and does not match that in the entry.
732 l2fib_del_entry (const u8 * mac, u32 bd_index, u32 sw_if_index)
734 l2fib_entry_result_t result;
735 l2fib_main_t *mp = &l2fib_main;
736 BVT (clib_bihash_kv) kv;
738 if (mp->mac_table_initialized == 0)
742 kv.key = l2fib_make_key (mac, bd_index);
744 if (BV (clib_bihash_search) (&mp->mac_table, &kv, &kv))
747 result.raw = kv.value;
749 /* check if sw_if_index of entry match */
750 if ((sw_if_index != 0) && (sw_if_index != result.fields.sw_if_index))
753 /* decrement counter if dynamically learned mac */
754 if ((!l2fib_entry_result_is_set_AGE_NOT (&result)) &&
755 (l2learn_main.global_learn_count))
756 l2learn_main.global_learn_count--;
758 /* Remove entry from hash table */
759 BV (clib_bihash_add_del) (&mp->mac_table, &kv, 0 /* is_add */ );
764 * Delete an entry from the L2FIB.
766 * l2fib del <mac> <bd-id>
768 static clib_error_t *
769 l2fib_del (vlib_main_t * vm,
770 unformat_input_t * input, vlib_cli_command_t * cmd)
772 bd_main_t *bdm = &bd_main;
773 clib_error_t *error = 0;
779 if (!unformat (input, "%U", unformat_ethernet_address, mac))
781 error = clib_error_return (0, "expected mac address `%U'",
782 format_unformat_error, input);
786 if (!unformat (input, "%d", &bd_id))
788 error = clib_error_return (0, "expected bridge domain ID `%U'",
789 format_unformat_error, input);
793 p = hash_get (bdm->bd_index_by_bd_id, bd_id);
796 error = clib_error_return (0, "bridge domain ID %d invalid", bd_id);
801 /* Delete the entry */
802 if (l2fib_del_entry (mac, bd_index, 0))
804 error = clib_error_return (0, "mac entry not found");
813 * This command deletes an existing MAC Address entry from the L2 FIB
814 * table of an existing bridge-domain.
817 * 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):
818 * @cliexcmd{l2fib del 52:54:00:53:18:33 200}
821 VLIB_CLI_COMMAND (l2fib_del_cli, static) = {
823 .short_help = "l2fib del <mac> <bridge-domain-id> []",
824 .function = l2fib_del,
829 Kick off ager to scan MACs to age/delete MAC entries
832 l2fib_start_ager_scan (vlib_main_t * vm)
834 uword evt = L2_MAC_AGE_PROCESS_EVENT_ONE_PASS;
836 /* check if there is at least one bd with mac aging enabled */
837 l2_bridge_domain_t *bd_config;
838 vec_foreach (bd_config, l2input_main.bd_configs)
840 if (bd_config->bd_id != ~0 && bd_config->mac_age != 0)
842 evt = L2_MAC_AGE_PROCESS_EVENT_START;
847 vlib_process_signal_event (vm, l2fib_mac_age_scanner_process_node.index,
852 Flush all non static MACs from an interface
855 l2fib_flush_int_mac (vlib_main_t * vm, u32 sw_if_index)
857 l2_input_seq_num_inc (sw_if_index);
858 l2fib_start_ager_scan (vm);
862 Flush all non static MACs in a bridge domain
865 l2fib_flush_bd_mac (vlib_main_t * vm, u32 bd_index)
867 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);
868 bd_config->seq_num += 1;
869 l2fib_start_ager_scan (vm);
873 Flush all non static MACs - flushes all valid BDs
876 l2fib_flush_all_mac (vlib_main_t * vm)
878 l2_bridge_domain_t *bd_config;
879 vec_foreach (bd_config, l2input_main.bd_configs)
880 if (bd_is_valid (bd_config))
881 bd_config->seq_num += 1;
883 l2fib_start_ager_scan (vm);
888 Flush MACs, except static ones, associated with an interface
890 l2fib flush-mac interface <if-name>
892 static clib_error_t *
893 l2fib_flush_mac_int (vlib_main_t * vm,
894 unformat_input_t * input, vlib_cli_command_t * cmd)
896 vnet_main_t *vnm = vnet_get_main ();
897 clib_error_t *error = 0;
900 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
902 error = clib_error_return (0, "unknown interface `%U'",
903 format_unformat_error, input);
907 l2fib_flush_int_mac (vm, sw_if_index);
914 Flush all MACs, except static ones
918 static clib_error_t *
919 l2fib_flush_mac_all (vlib_main_t * vm,
920 unformat_input_t * input, vlib_cli_command_t * cmd)
922 l2fib_flush_all_mac (vm);
927 * This command kick off ager to delete all existing MAC Address entries,
928 * except static ones, associated with an interface from the L2 FIB table.
931 * Example of how to flush MAC Address entries learned on an interface from the L2 FIB table:
932 * @cliexcmd{l2fib flush-mac interface GigabitEthernet2/1/0}
935 VLIB_CLI_COMMAND (l2fib_flush_mac_all_cli, static) = {
936 .path = "l2fib flush-mac all",
937 .short_help = "l2fib flush-mac all",
938 .function = l2fib_flush_mac_all,
943 * This command kick off ager to delete all existing MAC Address entries,
944 * except static ones, associated with an interface from the L2 FIB table.
947 * Example of how to flush MAC Address entries learned on an interface from the L2 FIB table:
948 * @cliexcmd{l2fib flush-mac interface GigabitEthernet2/1/0}
951 VLIB_CLI_COMMAND (l2fib_flush_mac_int_cli, static) = {
952 .path = "l2fib flush-mac interface",
953 .short_help = "l2fib flush-mac interface <if-name>",
954 .function = l2fib_flush_mac_int,
959 Flush bridge-domain MACs except static ones.
961 l2fib flush-mac bridge-domain <bd-id>
963 static clib_error_t *
964 l2fib_flush_mac_bd (vlib_main_t * vm,
965 unformat_input_t * input, vlib_cli_command_t * cmd)
967 bd_main_t *bdm = &bd_main;
968 clib_error_t *error = 0;
972 if (!unformat (input, "%d", &bd_id))
974 error = clib_error_return (0, "expecting bridge-domain id but got `%U'",
975 format_unformat_error, input);
979 p = hash_get (bdm->bd_index_by_bd_id, bd_id);
983 return clib_error_return (0, "No such bridge domain %d", bd_id);
985 l2fib_flush_bd_mac (vm, bd_index);
992 * This command kick off ager to delete all existing MAC Address entries,
993 * except static ones, in a bridge domain from the L2 FIB table.
996 * Example of how to flush MAC Address entries learned in a bridge domain from the L2 FIB table:
997 * @cliexcmd{l2fib flush-mac bridge-domain 1000}
1000 VLIB_CLI_COMMAND (l2fib_flush_mac_bd_cli, static) = {
1001 .path = "l2fib flush-mac bridge-domain",
1002 .short_help = "l2fib flush-mac bridge-domain <bd-id>",
1003 .function = l2fib_flush_mac_bd,
1008 l2fib_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
1010 l2_input_config_t *config = l2input_intf_config (sw_if_index);
1011 if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0 &&
1012 l2_input_is_bridge (config))
1013 l2fib_flush_int_mac (vnm->vlib_main, sw_if_index);
1017 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (l2fib_sw_interface_up_down);
1019 BVT (clib_bihash) * get_mac_table (void)
1021 l2fib_main_t *mp = &l2fib_main;
1022 return &mp->mac_table;
1025 static_always_inline void *
1026 allocate_mac_evt_buf (u32 client, u32 client_index)
1028 l2fib_main_t *fm = &l2fib_main;
1029 vl_api_l2_macs_event_t *mp = vl_msg_api_alloc
1030 (sizeof (*mp) + (fm->max_macs_in_event * sizeof (vl_api_mac_entry_t)));
1031 mp->_vl_msg_id = htons (VL_API_L2_MACS_EVENT);
1032 mp->pid = htonl (client);
1033 mp->client_index = client_index;
1037 static_always_inline f64
1038 l2fib_scan (vlib_main_t * vm, f64 start_time, u8 event_only)
1040 l2fib_main_t *fm = &l2fib_main;
1041 l2learn_main_t *lm = &l2learn_main;
1043 BVT (clib_bihash) * h = &fm->mac_table;
1045 f64 last_start = start_time;
1049 u32 learn_count = 0;
1050 u32 client = lm->client_pid;
1051 u32 cl_idx = lm->client_index;
1052 vl_api_l2_macs_event_t *mp = 0;
1053 vl_api_registration_t *reg = 0;
1055 /* Don't scan the l2 fib if it hasn't been instantiated yet */
1056 if (alloc_arena (h) == 0)
1061 mp = allocate_mac_evt_buf (client, cl_idx);
1062 reg = vl_api_client_index_to_registration (lm->client_index);
1065 for (i = 0; i < h->nbuckets; i++)
1067 /* allow no more than 20us without a pause */
1068 delta_t = vlib_time_now (vm) - last_start;
1069 if (delta_t > 20e-6)
1071 vlib_process_suspend (vm, 100e-6); /* suspend for 100 us */
1072 last_start = vlib_time_now (vm);
1076 if (i < (h->nbuckets - 3))
1078 BVT (clib_bihash_bucket) * b =
1079 BV (clib_bihash_get_bucket) (h, i + 3);
1080 CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
1081 b = BV (clib_bihash_get_bucket) (h, i + 1);
1082 if (!BV (clib_bihash_bucket_is_empty) (b))
1084 BVT (clib_bihash_value) * v =
1085 BV (clib_bihash_get_value) (h, b->offset);
1086 CLIB_PREFETCH (v, CLIB_CACHE_LINE_BYTES, LOAD);
1090 BVT (clib_bihash_bucket) * b = BV (clib_bihash_get_bucket) (h, i);
1091 if (BV (clib_bihash_bucket_is_empty) (b))
1093 BVT (clib_bihash_value) * v = BV (clib_bihash_get_value) (h, b->offset);
1094 for (j = 0; j < (1 << b->log2_pages); j++)
1096 for (k = 0; k < BIHASH_KVP_PER_PAGE; k++)
1098 if (v->kvp[k].key == ~0ULL && v->kvp[k].value == ~0ULL)
1101 l2fib_entry_key_t key = {.raw = v->kvp[k].key };
1102 l2fib_entry_result_t result = {.raw = v->kvp[k].value };
1104 if (!l2fib_entry_result_is_set_AGE_NOT (&result))
1109 if (PREDICT_FALSE (evt_idx >= fm->max_macs_in_event))
1111 /* event message full, send it and start a new one */
1112 if (reg && vl_api_can_send_msg (reg))
1114 mp->n_macs = htonl (evt_idx);
1115 vl_api_send_msg (reg, (u8 *) mp);
1116 mp = allocate_mac_evt_buf (client, cl_idx);
1121 clib_warning ("MAC event to pid %d queue stuffed!"
1122 " %d MAC entries lost", client,
1128 if (l2fib_entry_result_is_set_LRN_EVT (&result))
1130 /* copy mac entry to event msg */
1131 clib_memcpy_fast (mp->mac[evt_idx].mac_addr,
1133 mp->mac[evt_idx].action =
1134 l2fib_entry_result_is_set_LRN_MOV (&result) ?
1135 (vl_api_mac_event_action_t) MAC_EVENT_ACTION_MOVE
1136 : (vl_api_mac_event_action_t) MAC_EVENT_ACTION_ADD;
1137 mp->mac[evt_idx].action =
1138 htonl (mp->mac[evt_idx].action);
1139 mp->mac[evt_idx].sw_if_index =
1140 htonl (result.fields.sw_if_index);
1141 /* clear event bits and update mac entry */
1142 l2fib_entry_result_clear_LRN_EVT (&result);
1143 l2fib_entry_result_clear_LRN_MOV (&result);
1144 BVT (clib_bihash_kv) kv;
1146 kv.value = result.raw;
1147 BV (clib_bihash_add_del) (&fm->mac_table, &kv, 1);
1149 continue; /* skip aging */
1153 if (event_only || l2fib_entry_result_is_set_AGE_NOT (&result))
1154 continue; /* skip aging - static_mac always age_not */
1156 /* start aging processing */
1157 u32 bd_index = key.fields.bd_index;
1158 u32 sw_if_index = result.fields.sw_if_index;
1159 u16 sn = l2fib_cur_seq_num (bd_index, sw_if_index);
1160 if (result.fields.sn != sn)
1161 goto age_out; /* stale mac */
1163 l2_bridge_domain_t *bd_config =
1164 vec_elt_at_index (l2input_main.bd_configs, bd_index);
1166 if (bd_config->mac_age == 0)
1167 continue; /* skip aging */
1169 i16 delta = (u8) (start_time / 60) - result.fields.timestamp;
1170 delta += delta < 0 ? 256 : 0;
1172 if (delta < bd_config->mac_age)
1173 continue; /* still valid */
1178 /* copy mac entry to event msg */
1179 clib_memcpy_fast (mp->mac[evt_idx].mac_addr, key.fields.mac,
1181 mp->mac[evt_idx].action =
1182 (vl_api_mac_event_action_t) MAC_EVENT_ACTION_DELETE;
1183 mp->mac[evt_idx].action = htonl (mp->mac[evt_idx].action);
1184 mp->mac[evt_idx].sw_if_index =
1185 htonl (result.fields.sw_if_index);
1188 /* delete mac entry */
1189 BVT (clib_bihash_kv) kv;
1191 BV (clib_bihash_add_del) (&fm->mac_table, &kv, 0);
1194 * Note: we may have just freed the bucket's backing
1195 * storage, so check right here...
1197 if (BV (clib_bihash_bucket_is_empty) (b))
1206 /* keep learn count consistent */
1207 l2learn_main.global_learn_count = learn_count;
1211 /* send any outstanding mac event message else free message buffer */
1214 if (reg && vl_api_can_send_msg (reg))
1216 mp->n_macs = htonl (evt_idx);
1217 vl_api_send_msg (reg, (u8 *) mp);
1222 clib_warning ("MAC event to pid %d queue stuffed!"
1223 " %d MAC entries lost", client, evt_idx);
1224 vl_msg_api_free (mp);
1228 vl_msg_api_free (mp);
1230 return delta_t + accum_t;
1234 l2fib_mac_age_scanner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1237 uword event_type, *event_data = 0;
1238 l2fib_main_t *fm = &l2fib_main;
1239 l2learn_main_t *lm = &l2learn_main;
1241 f64 start_time, next_age_scan_time = CLIB_TIME_MAX;
1246 vlib_process_wait_for_event_or_clock (vm, fm->event_scan_delay);
1249 f64 t = next_age_scan_time - vlib_time_now (vm);
1250 vlib_process_wait_for_event_or_clock (vm, t);
1253 vlib_process_wait_for_event (vm);
1255 event_type = vlib_process_get_events (vm, &event_data);
1256 vec_reset_length (event_data);
1258 start_time = vlib_time_now (vm);
1260 { SCAN_MAC_AGE, SCAN_MAC_EVENT, SCAN_DISABLE } scan = SCAN_MAC_AGE;
1264 case ~0: /* timer expired */
1265 if (lm->client_pid != 0 && start_time < next_age_scan_time)
1266 scan = SCAN_MAC_EVENT;
1269 case L2_MAC_AGE_PROCESS_EVENT_START:
1273 case L2_MAC_AGE_PROCESS_EVENT_STOP:
1275 scan = SCAN_DISABLE;
1278 case L2_MAC_AGE_PROCESS_EVENT_ONE_PASS:
1285 if (scan == SCAN_MAC_EVENT)
1286 l2fib_main.evt_scan_duration = l2fib_scan (vm, start_time, 1);
1289 if (scan == SCAN_MAC_AGE)
1290 l2fib_main.age_scan_duration = l2fib_scan (vm, start_time, 0);
1291 if (scan == SCAN_DISABLE)
1293 l2fib_main.age_scan_duration = 0;
1294 l2fib_main.evt_scan_duration = 0;
1296 /* schedule next scan */
1298 next_age_scan_time = start_time + L2FIB_AGE_SCAN_INTERVAL;
1300 next_age_scan_time = CLIB_TIME_MAX;
1307 VLIB_REGISTER_NODE (l2fib_mac_age_scanner_process_node) = {
1308 .function = l2fib_mac_age_scanner_process,
1309 .type = VLIB_NODE_TYPE_PROCESS,
1310 .name = "l2fib-mac-age-scanner-process",
1315 l2fib_init (vlib_main_t * vm)
1317 l2fib_main_t *mp = &l2fib_main;
1318 l2fib_entry_key_t test_key;
1322 mp->vnet_main = vnet_get_main ();
1323 if (mp->mac_table_n_buckets == 0)
1324 mp->mac_table_n_buckets = L2FIB_NUM_BUCKETS;
1325 if (mp->mac_table_memory_size == 0)
1326 mp->mac_table_memory_size = L2FIB_MEMORY_SIZE;
1327 mp->mac_table_initialized = 0;
1329 /* verify the key constructor is good, since it is endian-sensitive */
1330 clib_memset (test_mac, 0, sizeof (test_mac));
1333 test_key.raw = l2fib_make_key ((u8 *) & test_mac, 0x1234);
1334 ASSERT (test_key.fields.mac[0] == 0x11);
1335 ASSERT (test_key.fields.bd_index == 0x1234);
1340 VLIB_INIT_FUNCTION (l2fib_init);
1342 static clib_error_t *
1343 lfib_config (vlib_main_t * vm, unformat_input_t * input)
1345 l2fib_main_t *lm = &l2fib_main;
1346 uword table_size = ~0;
1349 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1351 if (unformat (input, "table-size %U", unformat_memory_size,
1354 else if (unformat (input, "num-buckets %u", &n_buckets))
1357 return clib_error_return (0, "unknown input `%U'",
1358 format_unformat_error, input);
1361 if (n_buckets != ~0)
1363 if (!is_pow2 (n_buckets))
1364 return clib_error_return (0, "num-buckets must be power of 2");
1365 lm->mac_table_n_buckets = n_buckets;
1368 if (table_size != ~0)
1369 lm->mac_table_memory_size = table_size;
1373 VLIB_CONFIG_FUNCTION (lfib_config, "l2fib");
1376 * fd.io coding-style-patch-verification: ON
1379 * eval: (c-set-style "gnu")