2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * ethernet_interface.c: ethernet interfaces
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/ip/ip.h>
42 #include <vnet/pg/pg.h>
43 #include <vnet/ethernet/ethernet.h>
44 //#include <vnet/ethernet/arp.h>
45 #include <vnet/l2/l2_input.h>
46 #include <vnet/l2/l2_bd.h>
47 #include <vnet/adj/adj.h>
48 #include <vnet/adj/adj_mcast.h>
49 #include <vnet/ip-neighbor/ip_neighbor.h>
53 * @brief Loopback Interfaces.
55 * This file contains code to manage loopback interfaces.
59 ethernet_ip4_mcast_dst_addr (void)
61 const static u8 ethernet_mcast_dst_mac[] = {
62 0x1, 0x0, 0x5e, 0x0, 0x0, 0x0,
65 return (ethernet_mcast_dst_mac);
69 ethernet_ip6_mcast_dst_addr (void)
71 const static u8 ethernet_mcast_dst_mac[] = {
72 0x33, 0x33, 0x00, 0x0, 0x0, 0x0,
75 return (ethernet_mcast_dst_mac);
79 * @brief build a rewrite string to use for sending packets of type 'link_type'
83 ethernet_build_rewrite (vnet_main_t * vnm,
85 vnet_link_t link_type, const void *dst_address)
87 vnet_sw_interface_t *sub_sw = vnet_get_sw_interface (vnm, sw_if_index);
88 vnet_sw_interface_t *sup_sw = vnet_get_sup_sw_interface (vnm, sw_if_index);
89 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
90 ethernet_main_t *em = ðernet_main;
91 ethernet_interface_t *ei;
94 uword n_bytes = sizeof (h[0]);
98 if ((sub_sw->type == VNET_SW_INTERFACE_TYPE_P2P) ||
99 (sub_sw->type == VNET_SW_INTERFACE_TYPE_PIPE))
101 if (sub_sw != sup_sw)
103 if (sub_sw->sub.eth.flags.one_tag)
105 n_bytes += sizeof (ethernet_vlan_header_t);
107 else if (sub_sw->sub.eth.flags.two_tags)
109 n_bytes += 2 * (sizeof (ethernet_vlan_header_t));
111 else if (PREDICT_FALSE (is_p2p))
113 n_bytes = sizeof (ethernet_header_t);
115 if (PREDICT_FALSE (!is_p2p))
117 // Check for encaps that are not supported for L3 interfaces
118 if (!(sub_sw->sub.eth.flags.exact_match) ||
119 (sub_sw->sub.eth.flags.default_sub) ||
120 (sub_sw->sub.eth.flags.outer_vlan_id_any) ||
121 (sub_sw->sub.eth.flags.inner_vlan_id_any))
128 n_bytes = sizeof (ethernet_header_t);
134 #define _(a,b) case VNET_LINK_##a: type = ETHERNET_TYPE_##b; break
144 vec_validate (rewrite, n_bytes - 1);
145 h = (ethernet_header_t *) rewrite;
146 ei = pool_elt_at_index (em->interfaces, hw->hw_instance);
147 clib_memcpy (h->src_address, ei->address, sizeof (h->src_address));
150 clib_memcpy (h->dst_address, sub_sw->p2p.client_mac,
151 sizeof (h->dst_address));
156 clib_memcpy (h->dst_address, dst_address, sizeof (h->dst_address));
158 clib_memset (h->dst_address, ~0, sizeof (h->dst_address)); /* broadcast */
161 if (PREDICT_FALSE (!is_p2p) && sub_sw->sub.eth.flags.one_tag)
163 ethernet_vlan_header_t *outer = (void *) (h + 1);
165 h->type = sub_sw->sub.eth.flags.dot1ad ?
166 clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD) :
167 clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
168 outer->priority_cfi_and_id =
169 clib_host_to_net_u16 (sub_sw->sub.eth.outer_vlan_id);
170 outer->type = clib_host_to_net_u16 (type);
173 else if (PREDICT_FALSE (!is_p2p) && sub_sw->sub.eth.flags.two_tags)
175 ethernet_vlan_header_t *outer = (void *) (h + 1);
176 ethernet_vlan_header_t *inner = (void *) (outer + 1);
178 h->type = sub_sw->sub.eth.flags.dot1ad ?
179 clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD) :
180 clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
181 outer->priority_cfi_and_id =
182 clib_host_to_net_u16 (sub_sw->sub.eth.outer_vlan_id);
183 outer->type = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
184 inner->priority_cfi_and_id =
185 clib_host_to_net_u16 (sub_sw->sub.eth.inner_vlan_id);
186 inner->type = clib_host_to_net_u16 (type);
191 h->type = clib_host_to_net_u16 (type);
198 ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
200 vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
202 if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
203 (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
205 default_update_adjacency (vnm, sw_if_index, ai);
213 switch (adj->lookup_next_index)
215 case IP_LOOKUP_NEXT_GLEAN:
216 adj_glean_update_rewrite (ai);
218 case IP_LOOKUP_NEXT_ARP:
219 ip_neighbor_update (vnm, ai);
221 case IP_LOOKUP_NEXT_BCAST:
222 adj_nbr_update_rewrite (ai,
223 ADJ_NBR_REWRITE_FLAG_COMPLETE,
224 ethernet_build_rewrite
226 adj->rewrite_header.sw_if_index,
228 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
230 case IP_LOOKUP_NEXT_MCAST:
233 * Construct a partial rewrite from the known ethernet mcast dest MAC
238 rewrite = ethernet_build_rewrite
242 (adj->ia_nh_proto == FIB_PROTOCOL_IP6 ?
243 ethernet_ip6_mcast_dst_addr () :
244 ethernet_ip4_mcast_dst_addr ()));
247 * Complete the remaining fields of the adj's rewrite to direct the
248 * complete of the rewrite at switch time by copying in the IP
249 * dst address's bytes.
250 * Ofset is 2 bytes into the destintation address.
252 offset = vec_len (rewrite) - 2;
253 adj_mcast_update_rewrite (ai, rewrite, offset);
257 case IP_LOOKUP_NEXT_DROP:
258 case IP_LOOKUP_NEXT_PUNT:
259 case IP_LOOKUP_NEXT_LOCAL:
260 case IP_LOOKUP_NEXT_REWRITE:
261 case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
262 case IP_LOOKUP_NEXT_MIDCHAIN:
263 case IP_LOOKUP_NEXT_ICMP_ERROR:
264 case IP_LOOKUP_N_NEXT:
271 static clib_error_t *
272 ethernet_mac_change (vnet_hw_interface_t * hi,
273 const u8 * old_address, const u8 * mac_address)
275 ethernet_interface_t *ei;
279 ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
281 vec_validate (hi->hw_address,
282 STRUCT_SIZE_OF (ethernet_header_t, src_address) - 1);
283 clib_memcpy (hi->hw_address, mac_address, vec_len (hi->hw_address));
285 clib_memcpy (ei->address, (u8 *) mac_address, sizeof (ei->address));
288 ethernet_address_change_ctx_t *cb;
289 vec_foreach (cb, em->address_change_callbacks)
290 cb->function (em, hi->sw_if_index, cb->function_opaque);
297 VNET_HW_INTERFACE_CLASS (ethernet_hw_interface_class) = {
299 .format_address = format_ethernet_address,
300 .format_header = format_ethernet_header_with_length,
301 .unformat_hw_address = unformat_ethernet_address,
302 .unformat_header = unformat_ethernet_header,
303 .build_rewrite = ethernet_build_rewrite,
304 .update_adjacency = ethernet_update_adjacency,
305 .mac_addr_change_function = ethernet_mac_change,
310 unformat_ethernet_interface (unformat_input_t * input, va_list * args)
312 vnet_main_t *vnm = va_arg (*args, vnet_main_t *);
313 u32 *result = va_arg (*args, u32 *);
315 ethernet_main_t *em = ðernet_main;
316 ethernet_interface_t *eif;
318 if (!unformat_user (input, unformat_vnet_hw_interface, vnm, &hw_if_index))
321 eif = ethernet_get_interface (em, hw_if_index);
324 *result = hw_if_index;
331 ethernet_register_interface (vnet_main_t * vnm,
335 u32 * hw_if_index_return,
336 ethernet_flag_change_function_t flag_change)
338 ethernet_main_t *em = ðernet_main;
339 ethernet_interface_t *ei;
340 vnet_hw_interface_t *hi;
341 clib_error_t *error = 0;
344 pool_get (em->interfaces, ei);
345 ei->flag_change = flag_change;
347 hw_if_index = vnet_register_interface
349 dev_class_index, dev_instance,
350 ethernet_hw_interface_class.index, ei - em->interfaces);
351 *hw_if_index_return = hw_if_index;
353 hi = vnet_get_hw_interface (vnm, hw_if_index);
355 ethernet_setup_node (vnm->vlib_main, hi->output_node_index);
357 hi->min_packet_bytes = hi->min_supported_packet_bytes =
358 ETHERNET_MIN_PACKET_BYTES;
359 hi->max_packet_bytes = hi->max_supported_packet_bytes =
360 ETHERNET_MAX_PACKET_BYTES;
362 /* Default ethernet MTU, 9000 unless set by ethernet_config see below */
363 vnet_sw_interface_set_mtu (vnm, hi->sw_if_index, em->default_mtu);
365 clib_memcpy (ei->address, address, sizeof (ei->address));
366 vec_add (hi->hw_address, address, sizeof (ei->address));
367 CLIB_MEM_UNPOISON (hi->hw_address, 8);
371 pool_put (em->interfaces, ei);
378 ethernet_delete_interface (vnet_main_t * vnm, u32 hw_if_index)
380 ethernet_main_t *em = ðernet_main;
381 ethernet_interface_t *ei;
382 vnet_hw_interface_t *hi;
383 main_intf_t *main_intf;
384 vlan_table_t *vlan_table;
387 hi = vnet_get_hw_interface (vnm, hw_if_index);
388 ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
390 /* Delete vlan mapping table for dot1q and dot1ad. */
391 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
392 if (main_intf->dot1q_vlans)
394 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
395 for (idx = 0; idx < ETHERNET_N_VLAN; idx++)
397 if (vlan_table->vlans[idx].qinqs)
399 pool_put_index (em->qinq_pool, vlan_table->vlans[idx].qinqs);
400 vlan_table->vlans[idx].qinqs = 0;
403 pool_put_index (em->vlan_pool, main_intf->dot1q_vlans);
404 main_intf->dot1q_vlans = 0;
406 if (main_intf->dot1ad_vlans)
408 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
409 for (idx = 0; idx < ETHERNET_N_VLAN; idx++)
411 if (vlan_table->vlans[idx].qinqs)
413 pool_put_index (em->qinq_pool, vlan_table->vlans[idx].qinqs);
414 vlan_table->vlans[idx].qinqs = 0;
417 pool_put_index (em->vlan_pool, main_intf->dot1ad_vlans);
418 main_intf->dot1ad_vlans = 0;
421 vnet_delete_hw_interface (vnm, hw_if_index);
422 pool_put (em->interfaces, ei);
426 ethernet_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
428 ethernet_main_t *em = ðernet_main;
429 vnet_hw_interface_t *hi;
430 ethernet_interface_t *ei;
432 hi = vnet_get_hw_interface (vnm, hw_if_index);
434 ASSERT (hi->hw_class_index == ethernet_hw_interface_class.index);
436 ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
439 return ei->flag_change (vnm, hi, flags);
444 * Echo packets back to ethernet/l2-input.
447 simulated_ethernet_interface_tx (vlib_main_t * vm,
448 vlib_node_runtime_t *
449 node, vlib_frame_t * frame)
451 u32 n_left_from, *from;
454 u32 thread_index = vm->thread_index;
455 vnet_main_t *vnm = vnet_get_main ();
456 vnet_interface_main_t *im = &vnm->interface_main;
457 l2_input_config_t *config;
458 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
459 u16 nexts[VLIB_FRAME_SIZE], *next;
460 u32 new_rx_sw_if_index = ~0;
461 u32 new_tx_sw_if_index = ~0;
463 n_left_from = frame->n_vectors;
464 from = vlib_frame_vector_args (frame);
466 vlib_get_buffers (vm, from, bufs, n_left_from);
470 /* Ordinarily, this is the only config lookup. */
471 config = l2input_intf_config (vnet_buffer (b[0])->sw_if_index[VLIB_TX]);
473 config->bridge ? VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
474 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT;
475 new_tx_sw_if_index = config->bvi ? L2INPUT_BVI : ~0;
476 new_rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
478 while (n_left_from >= 4)
480 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
481 u32 not_all_match_config;
483 /* Prefetch next iteration. */
484 if (PREDICT_TRUE (n_left_from >= 8))
486 vlib_prefetch_buffer_header (b[4], STORE);
487 vlib_prefetch_buffer_header (b[5], STORE);
488 vlib_prefetch_buffer_header (b[6], STORE);
489 vlib_prefetch_buffer_header (b[7], STORE);
492 /* Make sure all pkts were transmitted on the same (loop) intfc */
493 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
494 sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
495 sw_if_index2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
496 sw_if_index3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
498 not_all_match_config = (sw_if_index0 ^ sw_if_index1)
499 ^ (sw_if_index2 ^ sw_if_index3);
500 not_all_match_config += sw_if_index0 ^ new_rx_sw_if_index;
502 /* Speed path / expected case: all pkts on the same intfc */
503 if (PREDICT_TRUE (not_all_match_config == 0))
505 next[0] = next_index;
506 next[1] = next_index;
507 next[2] = next_index;
508 next[3] = next_index;
509 vnet_buffer (b[0])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
510 vnet_buffer (b[1])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
511 vnet_buffer (b[2])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
512 vnet_buffer (b[3])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
513 vnet_buffer (b[0])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
514 vnet_buffer (b[1])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
515 vnet_buffer (b[2])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
516 vnet_buffer (b[3])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
517 n_bytes = vlib_buffer_length_in_chain (vm, b[0]);
518 n_bytes += vlib_buffer_length_in_chain (vm, b[1]);
519 n_bytes += vlib_buffer_length_in_chain (vm, b[2]);
520 n_bytes += vlib_buffer_length_in_chain (vm, b[3]);
522 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
524 vnet_update_l2_len (b[0]);
525 vnet_update_l2_len (b[1]);
526 vnet_update_l2_len (b[2]);
527 vnet_update_l2_len (b[3]);
530 /* increment TX interface stat */
531 vlib_increment_combined_counter (im->combined_sw_if_counters +
532 VNET_INTERFACE_COUNTER_TX,
533 thread_index, new_rx_sw_if_index,
534 4 /* pkts */ , n_bytes);
542 * Slow path: we know that at least one of the pkts
543 * was transmitted on a different sw_if_index, so
544 * check each sw_if_index against the cached data and proceed
547 * This shouldn't happen, but code can (and does) bypass the
548 * per-interface output node, so deal with it.
550 if (PREDICT_FALSE (vnet_buffer (b[0])->sw_if_index[VLIB_TX]
551 != new_rx_sw_if_index))
553 config = l2input_intf_config
554 (vnet_buffer (b[0])->sw_if_index[VLIB_TX]);
556 config->bridge ? VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
557 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT;
558 new_tx_sw_if_index = config->bvi ? L2INPUT_BVI : ~0;
559 new_rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
561 next[0] = next_index;
562 vnet_buffer (b[0])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
563 vnet_buffer (b[0])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
564 n_bytes = vlib_buffer_length_in_chain (vm, b[0]);
565 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
566 vnet_update_l2_len (b[0]);
568 vlib_increment_combined_counter (im->combined_sw_if_counters +
569 VNET_INTERFACE_COUNTER_TX,
570 thread_index, new_rx_sw_if_index,
571 1 /* pkts */ , n_bytes);
573 if (PREDICT_FALSE (vnet_buffer (b[1])->sw_if_index[VLIB_TX]
574 != new_rx_sw_if_index))
576 config = l2input_intf_config
577 (vnet_buffer (b[1])->sw_if_index[VLIB_TX]);
579 config->bridge ? VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
580 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT;
581 new_rx_sw_if_index = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
582 new_tx_sw_if_index = config->bvi ? L2INPUT_BVI : ~0;
584 next[1] = next_index;
585 vnet_buffer (b[1])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
586 vnet_buffer (b[1])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
587 n_bytes = vlib_buffer_length_in_chain (vm, b[1]);
588 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
589 vnet_update_l2_len (b[1]);
591 vlib_increment_combined_counter (im->combined_sw_if_counters +
592 VNET_INTERFACE_COUNTER_TX,
593 thread_index, new_rx_sw_if_index,
594 1 /* pkts */ , n_bytes);
596 if (PREDICT_FALSE (vnet_buffer (b[2])->sw_if_index[VLIB_TX]
597 != new_rx_sw_if_index))
599 config = l2input_intf_config
600 (vnet_buffer (b[2])->sw_if_index[VLIB_TX]);
602 config->bridge ? VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
603 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT;
604 new_rx_sw_if_index = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
605 new_tx_sw_if_index = config->bvi ? L2INPUT_BVI : ~0;
607 next[2] = next_index;
608 vnet_buffer (b[2])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
609 vnet_buffer (b[2])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
610 n_bytes = vlib_buffer_length_in_chain (vm, b[2]);
611 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
612 vnet_update_l2_len (b[2]);
614 vlib_increment_combined_counter (im->combined_sw_if_counters +
615 VNET_INTERFACE_COUNTER_TX,
616 thread_index, new_rx_sw_if_index,
617 1 /* pkts */ , n_bytes);
619 if (PREDICT_FALSE (vnet_buffer (b[3])->sw_if_index[VLIB_TX]
620 != new_rx_sw_if_index))
622 config = l2input_intf_config
623 (vnet_buffer (b[3])->sw_if_index[VLIB_TX]);
625 config->bridge ? VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
626 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT;
627 new_rx_sw_if_index = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
628 new_tx_sw_if_index = config->bvi ? L2INPUT_BVI : ~0;
630 next[3] = next_index;
631 vnet_buffer (b[3])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
632 vnet_buffer (b[3])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
633 n_bytes = vlib_buffer_length_in_chain (vm, b[3]);
634 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
635 vnet_update_l2_len (b[3]);
637 vlib_increment_combined_counter (im->combined_sw_if_counters +
638 VNET_INTERFACE_COUNTER_TX,
639 thread_index, new_rx_sw_if_index,
640 1 /* pkts */ , n_bytes);
645 while (n_left_from > 0)
647 if (PREDICT_FALSE (vnet_buffer (b[0])->sw_if_index[VLIB_TX]
648 != new_rx_sw_if_index))
650 config = l2input_intf_config
651 (vnet_buffer (b[0])->sw_if_index[VLIB_TX]);
653 config->bridge ? VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
654 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT;
655 new_tx_sw_if_index = config->bvi ? L2INPUT_BVI : ~0;
656 new_rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
658 next[0] = next_index;
659 vnet_buffer (b[0])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
660 vnet_buffer (b[0])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
661 n_bytes = vlib_buffer_length_in_chain (vm, b[0]);
662 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
663 vnet_update_l2_len (b[0]);
665 vlib_increment_combined_counter (im->combined_sw_if_counters +
666 VNET_INTERFACE_COUNTER_TX,
667 thread_index, new_rx_sw_if_index,
668 1 /* pkts */ , n_bytes);
674 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
676 return frame->n_vectors;
680 format_simulated_ethernet_name (u8 * s, va_list * args)
682 u32 dev_instance = va_arg (*args, u32);
683 return format (s, "loop%d", dev_instance);
686 static clib_error_t *
687 simulated_ethernet_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
690 u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
691 VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
692 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
696 static clib_error_t *
697 simulated_ethernet_mac_change (vnet_hw_interface_t * hi,
698 const u8 * old_address, const u8 * mac_address)
700 l2input_interface_mac_change (hi->sw_if_index, old_address, mac_address);
707 VNET_DEVICE_CLASS (ethernet_simulated_device_class) = {
709 .format_device_name = format_simulated_ethernet_name,
710 .tx_function = simulated_ethernet_interface_tx,
711 .admin_up_down_function = simulated_ethernet_admin_up_down,
712 .mac_addr_change_function = simulated_ethernet_mac_change,
717 * Maintain a bitmap of allocated loopback instance numbers.
719 #define LOOPBACK_MAX_INSTANCE (16 * 1024)
722 loopback_instance_alloc (u8 is_specified, u32 want)
724 ethernet_main_t *em = ðernet_main;
727 * Check for dynamically allocaetd instance number.
733 bit = clib_bitmap_first_clear (em->bm_loopback_instances);
734 if (bit >= LOOPBACK_MAX_INSTANCE)
738 em->bm_loopback_instances = clib_bitmap_set (em->bm_loopback_instances,
746 if (want >= LOOPBACK_MAX_INSTANCE)
754 if (clib_bitmap_get (em->bm_loopback_instances, want))
760 * Grant allocation request.
762 em->bm_loopback_instances = clib_bitmap_set (em->bm_loopback_instances,
769 loopback_instance_free (u32 instance)
771 ethernet_main_t *em = ðernet_main;
773 if (instance >= LOOPBACK_MAX_INSTANCE)
778 if (clib_bitmap_get (em->bm_loopback_instances, instance) == 0)
783 em->bm_loopback_instances = clib_bitmap_set (em->bm_loopback_instances,
789 vnet_create_loopback_interface (u32 * sw_if_indexp, u8 * mac_address,
790 u8 is_specified, u32 user_instance)
792 vnet_main_t *vnm = vnet_get_main ();
793 vlib_main_t *vm = vlib_get_main ();
798 vnet_hw_interface_t *hw_if;
802 ASSERT (sw_if_indexp);
804 *sw_if_indexp = (u32) ~ 0;
806 clib_memset (address, 0, sizeof (address));
809 * Allocate a loopback instance. Either select on dynamically
810 * or try to use the desired user_instance number.
812 instance = loopback_instance_alloc (is_specified, user_instance);
815 return VNET_API_ERROR_INVALID_REGISTRATION;
819 * Default MAC address (dead:0000:0000 + instance) is allocated
820 * if zero mac_address is configured. Otherwise, user-configurable MAC
821 * address is programmed on the loopback interface.
823 if (memcmp (address, mac_address, sizeof (address)))
824 clib_memcpy (address, mac_address, sizeof (address));
829 address[5] = instance;
832 error = ethernet_register_interface
834 ethernet_simulated_device_class.index, instance, address, &hw_if_index,
835 /* flag change */ 0);
839 rv = VNET_API_ERROR_INVALID_REGISTRATION;
840 clib_error_report (error);
844 hw_if = vnet_get_hw_interface (vnm, hw_if_index);
845 slot = vlib_node_add_named_next_with_slot
846 (vm, hw_if->tx_node_index,
847 "ethernet-input", VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
848 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
850 slot = vlib_node_add_named_next_with_slot
851 (vm, hw_if->tx_node_index,
852 "l2-input", VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT);
853 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT);
856 vnet_sw_interface_t *si = vnet_get_hw_sw_interface (vnm, hw_if_index);
857 *sw_if_indexp = si->sw_if_index;
859 /* By default don't flood to loopbacks, as packets just keep
860 * coming back ... If this loopback becomes a BVI, we'll change it */
861 si->flood_class = VNET_FLOOD_CLASS_NO_FLOOD;
867 static clib_error_t *
868 create_simulated_ethernet_interfaces (vlib_main_t * vm,
869 unformat_input_t * input,
870 vlib_cli_command_t * cmd)
876 u32 user_instance = 0;
878 clib_memset (mac_address, 0, sizeof (mac_address));
880 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
882 if (unformat (input, "mac %U", unformat_ethernet_address, mac_address))
884 if (unformat (input, "instance %d", &user_instance))
890 rv = vnet_create_loopback_interface (&sw_if_index, mac_address,
891 is_specified, user_instance);
894 return clib_error_return (0, "vnet_create_loopback_interface failed");
896 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
902 * Create a loopback interface. Optionally, a MAC Address can be
903 * provided. If not provided, de:ad:00:00:00:<loopId> will be used.
906 * The following two command syntaxes are equivalent:
907 * @cliexcmd{loopback create-interface [mac <mac-addr>] [instance <instance>]}
908 * @cliexcmd{create loopback interface [mac <mac-addr>] [instance <instance>]}
909 * Example of how to create a loopback interface:
910 * @cliexcmd{loopback create-interface}
913 VLIB_CLI_COMMAND (create_simulated_ethernet_interface_command, static) = {
914 .path = "loopback create-interface",
915 .short_help = "loopback create-interface [mac <mac-addr>] [instance <instance>]",
916 .function = create_simulated_ethernet_interfaces,
921 * Create a loopback interface. Optionally, a MAC Address can be
922 * provided. If not provided, de:ad:00:00:00:<loopId> will be used.
925 * The following two command syntaxes are equivalent:
926 * @cliexcmd{loopback create-interface [mac <mac-addr>] [instance <instance>]}
927 * @cliexcmd{create loopback interface [mac <mac-addr>] [instance <instance>]}
928 * Example of how to create a loopback interface:
929 * @cliexcmd{create loopback interface}
932 VLIB_CLI_COMMAND (create_loopback_interface_command, static) = {
933 .path = "create loopback interface",
934 .short_help = "create loopback interface [mac <mac-addr>] [instance <instance>]",
935 .function = create_simulated_ethernet_interfaces,
939 ethernet_interface_t *
940 ethernet_get_interface (ethernet_main_t * em, u32 hw_if_index)
942 vnet_hw_interface_t *i =
943 vnet_get_hw_interface (vnet_get_main (), hw_if_index);
944 return (i->hw_class_index ==
945 ethernet_hw_interface_class.
946 index ? pool_elt_at_index (em->interfaces, i->hw_instance) : 0);
950 ethernet_interface_add_del_address (ethernet_main_t * em,
951 u32 hw_if_index, const u8 * address,
954 ethernet_interface_t *ei = ethernet_get_interface (em, hw_if_index);
955 mac_address_t *if_addr = 0;
957 /* return if there is not an ethernet interface for this hw interface */
961 /* determine whether the address is configured on the interface */
962 vec_foreach (if_addr, ei->secondary_addrs)
964 if (!ethernet_mac_address_equal (if_addr->bytes, address))
970 if (if_addr && vec_is_member (ei->secondary_addrs, if_addr))
972 /* delete found address */
975 vec_delete (ei->secondary_addrs, 1, if_addr - ei->secondary_addrs);
978 /* address already found, so nothing needs to be done if adding */
982 /* if_addr could be 0 or past the end of the vector. reset to 0 */
985 /* add new address */
988 vec_add2 (ei->secondary_addrs, if_addr, 1);
989 clib_memcpy (&if_addr->bytes, address, sizeof (if_addr->bytes));
997 vnet_delete_loopback_interface (u32 sw_if_index)
999 vnet_main_t *vnm = vnet_get_main ();
1001 if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
1002 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1004 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1005 if (hw == 0 || hw->dev_class_index != ethernet_simulated_device_class.index)
1006 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1008 if (loopback_instance_free (hw->dev_instance) < 0)
1009 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1011 ethernet_delete_interface (vnm, hw->hw_if_index);
1017 vnet_create_sub_interface (u32 sw_if_index, u32 id,
1018 u32 flags, u16 inner_vlan_id, u16 outer_vlan_id,
1019 u32 * sub_sw_if_index)
1021 vnet_main_t *vnm = vnet_get_main ();
1022 vnet_interface_main_t *im = &vnm->interface_main;
1023 vnet_hw_interface_t *hi;
1024 u64 sup_and_sub_key = ((u64) (sw_if_index) << 32) | (u64) id;
1025 vnet_sw_interface_t template;
1029 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1031 p = hash_get_mem (im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
1034 return (VNET_API_ERROR_VLAN_ALREADY_EXISTS);
1037 clib_memset (&template, 0, sizeof (template));
1038 template.type = VNET_SW_INTERFACE_TYPE_SUB;
1039 template.flood_class = VNET_FLOOD_CLASS_NORMAL;
1040 template.sup_sw_if_index = sw_if_index;
1041 template.sub.id = id;
1042 template.sub.eth.raw_flags = flags;
1043 template.sub.eth.outer_vlan_id = outer_vlan_id;
1044 template.sub.eth.inner_vlan_id = inner_vlan_id;
1046 if (vnet_create_sw_interface (vnm, &template, sub_sw_if_index))
1047 return (VNET_API_ERROR_UNSPECIFIED);
1049 kp = clib_mem_alloc (sizeof (*kp));
1050 *kp = sup_and_sub_key;
1052 hash_set (hi->sub_interface_sw_if_index_by_id, id, *sub_sw_if_index);
1053 hash_set_mem (im->sw_if_index_by_sup_and_sub, kp, *sub_sw_if_index);
1059 vnet_delete_sub_interface (u32 sw_if_index)
1061 vnet_main_t *vnm = vnet_get_main ();
1062 vnet_sw_interface_t *si;
1065 if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
1066 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1068 si = vnet_get_sw_interface (vnm, sw_if_index);
1069 if (si->type == VNET_SW_INTERFACE_TYPE_SUB ||
1070 si->type == VNET_SW_INTERFACE_TYPE_PIPE ||
1071 si->type == VNET_SW_INTERFACE_TYPE_P2P)
1073 vnet_interface_main_t *im = &vnm->interface_main;
1074 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1075 u64 sup_and_sub_key =
1076 ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
1077 hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
1078 hash_unset (hi->sub_interface_sw_if_index_by_id, si->sub.id);
1079 vnet_delete_sw_interface (vnm, sw_if_index);
1082 rv = VNET_API_ERROR_INVALID_SUB_SW_IF_INDEX;
1087 static clib_error_t *
1088 delete_simulated_ethernet_interfaces (vlib_main_t * vm,
1089 unformat_input_t * input,
1090 vlib_cli_command_t * cmd)
1093 u32 sw_if_index = ~0;
1094 vnet_main_t *vnm = vnet_get_main ();
1096 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1098 if (unformat (input, "intfc %U",
1099 unformat_vnet_sw_interface, vnm, &sw_if_index))
1105 if (sw_if_index == ~0)
1106 return clib_error_return (0, "interface not specified");
1108 rv = vnet_delete_loopback_interface (sw_if_index);
1111 return clib_error_return (0, "vnet_delete_loopback_interface failed");
1116 static clib_error_t *
1117 delete_sub_interface (vlib_main_t * vm,
1118 unformat_input_t * input, vlib_cli_command_t * cmd)
1121 u32 sw_if_index = ~0;
1122 vnet_main_t *vnm = vnet_get_main ();
1124 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1127 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1132 if (sw_if_index == ~0)
1133 return clib_error_return (0, "interface doesn't exist");
1135 if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
1136 rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
1138 rv = vnet_delete_sub_interface (sw_if_index);
1140 return clib_error_return (0, "delete_subinterface_interface failed");
1145 * Delete a loopback interface.
1148 * The following two command syntaxes are equivalent:
1149 * @cliexcmd{loopback delete-interface intfc <interface>}
1150 * @cliexcmd{delete loopback interface intfc <interface>}
1151 * Example of how to delete a loopback interface:
1152 * @cliexcmd{loopback delete-interface intfc loop0}
1155 VLIB_CLI_COMMAND (delete_simulated_ethernet_interface_command, static) = {
1156 .path = "loopback delete-interface",
1157 .short_help = "loopback delete-interface intfc <interface>",
1158 .function = delete_simulated_ethernet_interfaces,
1163 * Delete a loopback interface.
1166 * The following two command syntaxes are equivalent:
1167 * @cliexcmd{loopback delete-interface intfc <interface>}
1168 * @cliexcmd{delete loopback interface intfc <interface>}
1169 * Example of how to delete a loopback interface:
1170 * @cliexcmd{delete loopback interface intfc loop0}
1173 VLIB_CLI_COMMAND (delete_loopback_interface_command, static) = {
1174 .path = "delete loopback interface",
1175 .short_help = "delete loopback interface intfc <interface>",
1176 .function = delete_simulated_ethernet_interfaces,
1181 * Delete a sub-interface.
1184 * Example of how to delete a sub-interface:
1185 * @cliexcmd{delete sub-interface GigabitEthernet0/8/0.200}
1188 VLIB_CLI_COMMAND (delete_sub_interface_command, static) = {
1189 .path = "delete sub-interface",
1190 .short_help = "delete sub-interface <interface>",
1191 .function = delete_sub_interface,
1195 /* ethernet { ... } configuration. */
1198 * @cfgcmd{default-mtu <n>}
1199 * Specify the default mtu in the range of 64-9000. The default is 9000 bytes.
1202 static clib_error_t *
1203 ethernet_config (vlib_main_t * vm, unformat_input_t * input)
1205 ethernet_main_t *em = ðernet_main;
1207 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1209 if (unformat (input, "default-mtu %u", &em->default_mtu))
1211 if (em->default_mtu < 64 || em->default_mtu > 9000)
1212 return clib_error_return (0, "default MTU must be >=64, <=9000");
1216 return clib_error_return (0, "unknown input '%U'",
1217 format_unformat_error, input);
1223 VLIB_CONFIG_FUNCTION (ethernet_config, "ethernet");
1226 * fd.io coding-style-patch-verification: ON
1229 * eval: (c-set-style "gnu")