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 case IP_LOOKUP_NEXT_REWRITE:
220 ip_neighbor_update (vnm, ai);
222 case IP_LOOKUP_NEXT_BCAST:
223 adj_nbr_update_rewrite (ai,
224 ADJ_NBR_REWRITE_FLAG_COMPLETE,
225 ethernet_build_rewrite
227 adj->rewrite_header.sw_if_index,
229 VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
231 case IP_LOOKUP_NEXT_MCAST:
234 * Construct a partial rewrite from the known ethernet mcast dest MAC
239 rewrite = ethernet_build_rewrite
243 (adj->ia_nh_proto == FIB_PROTOCOL_IP6 ?
244 ethernet_ip6_mcast_dst_addr () :
245 ethernet_ip4_mcast_dst_addr ()));
248 * Complete the remaining fields of the adj's rewrite to direct the
249 * complete of the rewrite at switch time by copying in the IP
250 * dst address's bytes.
251 * Ofset is 2 bytes into the destintation address.
253 offset = vec_len (rewrite) - 2;
254 adj_mcast_update_rewrite (ai, rewrite, offset);
258 case IP_LOOKUP_NEXT_DROP:
259 case IP_LOOKUP_NEXT_PUNT:
260 case IP_LOOKUP_NEXT_LOCAL:
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:
272 ethernet_interface_address_copy (ethernet_interface_address_t * dst,
275 clib_memcpy (&dst->mac, (u8 *) mac, sizeof (dst->mac));
277 * ethernet dataplane loads mac as u64, makes sure the last 2 bytes are 0
278 * for comparison purpose
284 ethernet_set_mac (vnet_hw_interface_t * hi, ethernet_interface_t * ei,
285 const u8 * mac_address)
287 vec_validate (hi->hw_address, sizeof (mac_address_t) - 1);
288 clib_memcpy (hi->hw_address, mac_address, sizeof (mac_address_t));
289 ethernet_interface_address_copy (&ei->address, mac_address);
292 static clib_error_t *
293 ethernet_mac_change (vnet_hw_interface_t * hi,
294 const u8 * old_address, const u8 * mac_address)
296 ethernet_interface_t *ei;
300 ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
302 ethernet_set_mac (hi, ei, mac_address);
305 ethernet_address_change_ctx_t *cb;
306 vec_foreach (cb, em->address_change_callbacks)
307 cb->function (em, hi->sw_if_index, cb->function_opaque);
313 static clib_error_t *
314 ethernet_set_mtu (vnet_main_t *vnm, vnet_hw_interface_t *hi, u32 mtu)
316 ethernet_interface_t *ei =
317 pool_elt_at_index (ethernet_main.interfaces, hi->hw_instance);
320 return ei->cb.set_mtu (vnm, hi, mtu);
326 VNET_HW_INTERFACE_CLASS (ethernet_hw_interface_class) = {
328 .tx_hash_fn_type = VNET_HASH_FN_TYPE_ETHERNET,
329 .format_address = format_ethernet_address,
330 .format_header = format_ethernet_header_with_length,
331 .unformat_hw_address = unformat_ethernet_address,
332 .unformat_header = unformat_ethernet_header,
333 .build_rewrite = ethernet_build_rewrite,
334 .update_adjacency = ethernet_update_adjacency,
335 .mac_addr_change_function = ethernet_mac_change,
336 .set_mtu = ethernet_set_mtu,
341 unformat_ethernet_interface (unformat_input_t * input, va_list * args)
343 vnet_main_t *vnm = va_arg (*args, vnet_main_t *);
344 u32 *result = va_arg (*args, u32 *);
346 ethernet_main_t *em = ðernet_main;
347 ethernet_interface_t *eif;
349 if (!unformat_user (input, unformat_vnet_hw_interface, vnm, &hw_if_index))
352 eif = ethernet_get_interface (em, hw_if_index);
355 *result = hw_if_index;
362 vnet_eth_register_interface (vnet_main_t *vnm,
363 vnet_eth_interface_registration_t *r)
365 ethernet_main_t *em = ðernet_main;
366 ethernet_interface_t *ei;
367 vnet_hw_interface_t *hi;
370 pool_get (em->interfaces, ei);
371 clib_memcpy (&ei->cb, &r->cb, sizeof (vnet_eth_if_callbacks_t));
373 hw_if_index = vnet_register_interface (
374 vnm, r->dev_class_index, r->dev_instance,
375 ethernet_hw_interface_class.index, ei - em->interfaces);
377 hi = vnet_get_hw_interface (vnm, hw_if_index);
379 ethernet_setup_node (vnm->vlib_main, hi->output_node_index);
381 hi->min_packet_bytes = hi->min_supported_packet_bytes =
382 ETHERNET_MIN_PACKET_BYTES;
383 hi->max_supported_packet_bytes = ETHERNET_MAX_PACKET_BYTES;
384 hi->max_packet_bytes = em->default_mtu;
386 /* Default ethernet MTU, 9000 unless set by ethernet_config see below */
387 vnet_sw_interface_set_mtu (vnm, hi->sw_if_index, em->default_mtu);
389 ethernet_set_mac (hi, ei, r->address);
394 ethernet_delete_interface (vnet_main_t * vnm, u32 hw_if_index)
396 ethernet_main_t *em = ðernet_main;
397 ethernet_interface_t *ei;
398 vnet_hw_interface_t *hi;
399 main_intf_t *main_intf;
400 vlan_table_t *vlan_table;
403 hi = vnet_get_hw_interface (vnm, hw_if_index);
404 ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
406 /* Delete vlan mapping table for dot1q and dot1ad. */
407 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
408 if (main_intf->dot1q_vlans)
410 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
411 for (idx = 0; idx < ETHERNET_N_VLAN; idx++)
413 if (vlan_table->vlans[idx].qinqs)
415 pool_put_index (em->qinq_pool, vlan_table->vlans[idx].qinqs);
416 vlan_table->vlans[idx].qinqs = 0;
419 pool_put_index (em->vlan_pool, main_intf->dot1q_vlans);
420 main_intf->dot1q_vlans = 0;
422 if (main_intf->dot1ad_vlans)
424 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
425 for (idx = 0; idx < ETHERNET_N_VLAN; idx++)
427 if (vlan_table->vlans[idx].qinqs)
429 pool_put_index (em->qinq_pool, vlan_table->vlans[idx].qinqs);
430 vlan_table->vlans[idx].qinqs = 0;
433 pool_put_index (em->vlan_pool, main_intf->dot1ad_vlans);
434 main_intf->dot1ad_vlans = 0;
437 vnet_delete_hw_interface (vnm, hw_if_index);
438 pool_put (em->interfaces, ei);
442 ethernet_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
444 ethernet_main_t *em = ðernet_main;
445 vnet_hw_interface_t *hi;
446 ethernet_interface_t *ei;
447 u32 opn_flags = flags & ETHERNET_INTERFACE_FLAGS_SET_OPN_MASK;
449 hi = vnet_get_hw_interface (vnm, hw_if_index);
451 ASSERT (hi->hw_class_index == ethernet_hw_interface_class.index);
453 ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
455 /* preserve status bits and update last set operation bits */
456 ei->flags = (ei->flags & ETHERNET_INTERFACE_FLAGS_STATUS_MASK) | opn_flags;
458 if (ei->cb.flag_change)
462 case ETHERNET_INTERFACE_FLAG_DEFAULT_L3:
463 if (hi->caps & VNET_HW_IF_CAP_MAC_FILTER)
465 if (ei->cb.flag_change (vnm, hi, opn_flags) != ~0)
467 ei->flags |= ETHERNET_INTERFACE_FLAG_STATUS_L3;
470 ei->flags &= ~ETHERNET_INTERFACE_FLAG_STATUS_L3;
474 case ETHERNET_INTERFACE_FLAG_ACCEPT_ALL:
475 ei->flags &= ~ETHERNET_INTERFACE_FLAG_STATUS_L3;
476 return ei->cb.flag_change (vnm, hi, opn_flags);
485 * Echo packets back to ethernet/l2-input.
488 simulated_ethernet_interface_tx (vlib_main_t * vm,
489 vlib_node_runtime_t *
490 node, vlib_frame_t * frame)
492 u32 n_left_from, *from;
495 u32 thread_index = vm->thread_index;
496 vnet_main_t *vnm = vnet_get_main ();
497 vnet_interface_main_t *im = &vnm->interface_main;
498 l2_input_config_t *config;
499 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
500 u16 nexts[VLIB_FRAME_SIZE], *next;
501 u32 new_rx_sw_if_index = ~0;
502 u32 new_tx_sw_if_index = ~0;
504 n_left_from = frame->n_vectors;
505 from = vlib_frame_vector_args (frame);
507 vlib_get_buffers (vm, from, bufs, n_left_from);
511 /* Ordinarily, this is the only config lookup. */
512 config = l2input_intf_config (vnet_buffer (b[0])->sw_if_index[VLIB_TX]);
513 next_index = (l2_input_is_bridge (config) ?
514 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
515 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
516 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
517 new_rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
519 while (n_left_from >= 4)
521 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
522 u32 not_all_match_config;
524 /* Prefetch next iteration. */
525 if (PREDICT_TRUE (n_left_from >= 8))
527 vlib_prefetch_buffer_header (b[4], STORE);
528 vlib_prefetch_buffer_header (b[5], STORE);
529 vlib_prefetch_buffer_header (b[6], STORE);
530 vlib_prefetch_buffer_header (b[7], STORE);
533 /* Make sure all pkts were transmitted on the same (loop) intfc */
534 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
535 sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
536 sw_if_index2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
537 sw_if_index3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
539 not_all_match_config = (sw_if_index0 ^ sw_if_index1)
540 ^ (sw_if_index2 ^ sw_if_index3);
541 not_all_match_config += sw_if_index0 ^ new_rx_sw_if_index;
543 /* Speed path / expected case: all pkts on the same intfc */
544 if (PREDICT_TRUE (not_all_match_config == 0))
546 next[0] = next_index;
547 next[1] = next_index;
548 next[2] = next_index;
549 next[3] = next_index;
550 vnet_buffer (b[0])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
551 vnet_buffer (b[1])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
552 vnet_buffer (b[2])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
553 vnet_buffer (b[3])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
554 vnet_buffer (b[0])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
555 vnet_buffer (b[1])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
556 vnet_buffer (b[2])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
557 vnet_buffer (b[3])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
558 n_bytes = vlib_buffer_length_in_chain (vm, b[0]);
559 n_bytes += vlib_buffer_length_in_chain (vm, b[1]);
560 n_bytes += vlib_buffer_length_in_chain (vm, b[2]);
561 n_bytes += vlib_buffer_length_in_chain (vm, b[3]);
563 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
565 vnet_update_l2_len (b[0]);
566 vnet_update_l2_len (b[1]);
567 vnet_update_l2_len (b[2]);
568 vnet_update_l2_len (b[3]);
571 /* increment TX interface stat */
572 vlib_increment_combined_counter (im->combined_sw_if_counters +
573 VNET_INTERFACE_COUNTER_TX,
574 thread_index, new_rx_sw_if_index,
575 4 /* pkts */ , n_bytes);
583 * Slow path: we know that at least one of the pkts
584 * was transmitted on a different sw_if_index, so
585 * check each sw_if_index against the cached data and proceed
588 * This shouldn't happen, but code can (and does) bypass the
589 * per-interface output node, so deal with it.
591 if (PREDICT_FALSE (vnet_buffer (b[0])->sw_if_index[VLIB_TX]
592 != new_rx_sw_if_index))
594 config = l2input_intf_config
595 (vnet_buffer (b[0])->sw_if_index[VLIB_TX]);
596 next_index = (l2_input_is_bridge (config) ?
597 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
598 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
599 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
600 new_rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
602 next[0] = next_index;
603 vnet_buffer (b[0])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
604 vnet_buffer (b[0])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
605 n_bytes = vlib_buffer_length_in_chain (vm, b[0]);
606 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
607 vnet_update_l2_len (b[0]);
609 vlib_increment_combined_counter (im->combined_sw_if_counters +
610 VNET_INTERFACE_COUNTER_TX,
611 thread_index, new_rx_sw_if_index,
612 1 /* pkts */ , n_bytes);
614 if (PREDICT_FALSE (vnet_buffer (b[1])->sw_if_index[VLIB_TX]
615 != new_rx_sw_if_index))
617 config = l2input_intf_config
618 (vnet_buffer (b[1])->sw_if_index[VLIB_TX]);
619 next_index = (l2_input_is_bridge (config) ?
620 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
621 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
622 new_rx_sw_if_index = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
623 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
625 next[1] = next_index;
626 vnet_buffer (b[1])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
627 vnet_buffer (b[1])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
628 n_bytes = vlib_buffer_length_in_chain (vm, b[1]);
629 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
630 vnet_update_l2_len (b[1]);
632 vlib_increment_combined_counter (im->combined_sw_if_counters +
633 VNET_INTERFACE_COUNTER_TX,
634 thread_index, new_rx_sw_if_index,
635 1 /* pkts */ , n_bytes);
637 if (PREDICT_FALSE (vnet_buffer (b[2])->sw_if_index[VLIB_TX]
638 != new_rx_sw_if_index))
640 config = l2input_intf_config
641 (vnet_buffer (b[2])->sw_if_index[VLIB_TX]);
642 next_index = (l2_input_is_bridge (config) ?
643 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
644 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
645 new_rx_sw_if_index = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
646 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
648 next[2] = next_index;
649 vnet_buffer (b[2])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
650 vnet_buffer (b[2])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
651 n_bytes = vlib_buffer_length_in_chain (vm, b[2]);
652 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
653 vnet_update_l2_len (b[2]);
655 vlib_increment_combined_counter (im->combined_sw_if_counters +
656 VNET_INTERFACE_COUNTER_TX,
657 thread_index, new_rx_sw_if_index,
658 1 /* pkts */ , n_bytes);
660 if (PREDICT_FALSE (vnet_buffer (b[3])->sw_if_index[VLIB_TX]
661 != new_rx_sw_if_index))
663 config = l2input_intf_config
664 (vnet_buffer (b[3])->sw_if_index[VLIB_TX]);
665 next_index = (l2_input_is_bridge (config) ?
666 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
667 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
668 new_rx_sw_if_index = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
669 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
671 next[3] = next_index;
672 vnet_buffer (b[3])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
673 vnet_buffer (b[3])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
674 n_bytes = vlib_buffer_length_in_chain (vm, b[3]);
675 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
676 vnet_update_l2_len (b[3]);
678 vlib_increment_combined_counter (im->combined_sw_if_counters +
679 VNET_INTERFACE_COUNTER_TX,
680 thread_index, new_rx_sw_if_index,
681 1 /* pkts */ , n_bytes);
686 while (n_left_from > 0)
688 if (PREDICT_FALSE (vnet_buffer (b[0])->sw_if_index[VLIB_TX]
689 != new_rx_sw_if_index))
691 config = l2input_intf_config
692 (vnet_buffer (b[0])->sw_if_index[VLIB_TX]);
693 next_index = (l2_input_is_bridge (config) ?
694 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
695 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
696 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
697 new_rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
699 next[0] = next_index;
700 vnet_buffer (b[0])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
701 vnet_buffer (b[0])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
702 n_bytes = vlib_buffer_length_in_chain (vm, b[0]);
703 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
704 vnet_update_l2_len (b[0]);
706 vlib_increment_combined_counter (im->combined_sw_if_counters +
707 VNET_INTERFACE_COUNTER_TX,
708 thread_index, new_rx_sw_if_index,
709 1 /* pkts */ , n_bytes);
715 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
717 return frame->n_vectors;
721 format_simulated_ethernet_name (u8 * s, va_list * args)
723 u32 dev_instance = va_arg (*args, u32);
724 return format (s, "loop%d", dev_instance);
727 static clib_error_t *
728 simulated_ethernet_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
731 u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
732 VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
733 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
737 static clib_error_t *
738 simulated_ethernet_mac_change (vnet_hw_interface_t * hi,
739 const u8 * old_address, const u8 * mac_address)
741 l2input_interface_mac_change (hi->sw_if_index, old_address, mac_address);
748 VNET_DEVICE_CLASS (ethernet_simulated_device_class) = {
750 .format_device_name = format_simulated_ethernet_name,
751 .tx_function = simulated_ethernet_interface_tx,
752 .admin_up_down_function = simulated_ethernet_admin_up_down,
753 .mac_addr_change_function = simulated_ethernet_mac_change,
758 * Maintain a bitmap of allocated loopback instance numbers.
760 #define LOOPBACK_MAX_INSTANCE (16 * 1024)
763 loopback_instance_alloc (u8 is_specified, u32 want)
765 ethernet_main_t *em = ðernet_main;
768 * Check for dynamically allocaetd instance number.
774 bit = clib_bitmap_first_clear (em->bm_loopback_instances);
775 if (bit >= LOOPBACK_MAX_INSTANCE)
779 em->bm_loopback_instances = clib_bitmap_set (em->bm_loopback_instances,
787 if (want >= LOOPBACK_MAX_INSTANCE)
795 if (clib_bitmap_get (em->bm_loopback_instances, want))
801 * Grant allocation request.
803 em->bm_loopback_instances = clib_bitmap_set (em->bm_loopback_instances,
810 loopback_instance_free (u32 instance)
812 ethernet_main_t *em = ðernet_main;
814 if (instance >= LOOPBACK_MAX_INSTANCE)
819 if (clib_bitmap_get (em->bm_loopback_instances, instance) == 0)
824 em->bm_loopback_instances = clib_bitmap_set (em->bm_loopback_instances,
830 vnet_create_loopback_interface (u32 * sw_if_indexp, u8 * mac_address,
831 u8 is_specified, u32 user_instance)
833 vnet_main_t *vnm = vnet_get_main ();
834 vlib_main_t *vm = vlib_get_main ();
838 vnet_hw_interface_t *hw_if;
841 ASSERT (sw_if_indexp);
843 *sw_if_indexp = (u32) ~ 0;
845 clib_memset (address, 0, sizeof (address));
848 * Allocate a loopback instance. Either select on dynamically
849 * or try to use the desired user_instance number.
851 instance = loopback_instance_alloc (is_specified, user_instance);
854 return VNET_API_ERROR_INVALID_REGISTRATION;
858 * Default MAC address (dead:0000:0000 + instance) is allocated
859 * if zero mac_address is configured. Otherwise, user-configurable MAC
860 * address is programmed on the loopback interface.
862 if (memcmp (address, mac_address, sizeof (address)))
863 clib_memcpy (address, mac_address, sizeof (address));
868 address[5] = instance;
871 vnet_eth_interface_registration_t eir = {};
872 eir.dev_class_index = ethernet_simulated_device_class.index;
873 eir.dev_instance = instance;
874 eir.address = address;
875 hw_if_index = vnet_eth_register_interface (vnm, &eir);
876 hw_if = vnet_get_hw_interface (vnm, hw_if_index);
877 slot = vlib_node_add_named_next_with_slot
878 (vm, hw_if->tx_node_index,
879 "ethernet-input", VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
880 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
882 slot = vlib_node_add_named_next_with_slot
883 (vm, hw_if->tx_node_index,
884 "l2-input", VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT);
885 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT);
888 vnet_sw_interface_t *si = vnet_get_hw_sw_interface (vnm, hw_if_index);
889 *sw_if_indexp = si->sw_if_index;
891 /* By default don't flood to loopbacks, as packets just keep
892 * coming back ... If this loopback becomes a BVI, we'll change it */
893 si->flood_class = VNET_FLOOD_CLASS_NO_FLOOD;
899 static clib_error_t *
900 create_simulated_ethernet_interfaces (vlib_main_t * vm,
901 unformat_input_t * input,
902 vlib_cli_command_t * cmd)
908 u32 user_instance = 0;
910 clib_memset (mac_address, 0, sizeof (mac_address));
912 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
914 if (unformat (input, "mac %U", unformat_ethernet_address, mac_address))
916 if (unformat (input, "instance %d", &user_instance))
922 rv = vnet_create_loopback_interface (&sw_if_index, mac_address,
923 is_specified, user_instance);
926 return clib_error_return (0, "vnet_create_loopback_interface failed");
928 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
934 * Create a loopback interface. Optionally, a MAC Address can be
935 * provided. If not provided, de:ad:00:00:00:<loopId> will be used.
938 * The following two command syntaxes are equivalent:
939 * @cliexcmd{loopback create-interface [mac <mac-addr>] [instance <instance>]}
940 * @cliexcmd{create loopback interface [mac <mac-addr>] [instance <instance>]}
941 * Example of how to create a loopback interface:
942 * @cliexcmd{loopback create-interface}
945 VLIB_CLI_COMMAND (create_simulated_ethernet_interface_command, static) = {
946 .path = "loopback create-interface",
947 .short_help = "loopback create-interface [mac <mac-addr>] [instance <instance>]",
948 .function = create_simulated_ethernet_interfaces,
953 * Create a loopback interface. Optionally, a MAC Address can be
954 * provided. If not provided, de:ad:00:00:00:<loopId> will be used.
957 * The following two command syntaxes are equivalent:
958 * @cliexcmd{loopback create-interface [mac <mac-addr>] [instance <instance>]}
959 * @cliexcmd{create loopback interface [mac <mac-addr>] [instance <instance>]}
960 * Example of how to create a loopback interface:
961 * @cliexcmd{create loopback interface}
964 VLIB_CLI_COMMAND (create_loopback_interface_command, static) = {
965 .path = "create loopback interface",
966 .short_help = "create loopback interface [mac <mac-addr>] [instance <instance>]",
967 .function = create_simulated_ethernet_interfaces,
971 ethernet_interface_t *
972 ethernet_get_interface (ethernet_main_t * em, u32 hw_if_index)
974 vnet_hw_interface_t *i =
975 vnet_get_hw_interface (vnet_get_main (), hw_if_index);
976 return (i->hw_class_index ==
977 ethernet_hw_interface_class.
978 index ? pool_elt_at_index (em->interfaces, i->hw_instance) : 0);
982 ethernet_interface_add_del_address (ethernet_main_t * em,
983 u32 hw_if_index, const u8 * address,
986 ethernet_interface_t *ei = ethernet_get_interface (em, hw_if_index);
987 ethernet_interface_address_t *if_addr = 0;
990 /* return if there is not an ethernet interface for this hw interface */
994 /* determine whether the address is configured on the interface */
995 vec_foreach (if_addr, ei->secondary_addrs)
997 if (ethernet_mac_address_equal (if_addr->mac.bytes, address))
1008 /* address not found yet: add it */
1009 vec_add2 (ei->secondary_addrs, if_addr, 1);
1010 ethernet_interface_address_copy (if_addr, address);
1012 return &if_addr->mac;
1017 vec_delete (ei->secondary_addrs, 1, if_addr - ei->secondary_addrs);
1023 vnet_delete_loopback_interface (u32 sw_if_index)
1025 vnet_main_t *vnm = vnet_get_main ();
1027 if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
1028 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1030 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1031 if (hw == 0 || hw->dev_class_index != ethernet_simulated_device_class.index)
1032 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1034 if (loopback_instance_free (hw->dev_instance) < 0)
1035 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1037 ethernet_delete_interface (vnm, hw->hw_if_index);
1043 vnet_create_sub_interface (u32 sw_if_index, u32 id,
1044 u32 flags, u16 inner_vlan_id, u16 outer_vlan_id,
1045 u32 * sub_sw_if_index)
1047 vnet_main_t *vnm = vnet_get_main ();
1048 vnet_interface_main_t *im = &vnm->interface_main;
1049 vnet_hw_interface_t *hi;
1050 u64 sup_and_sub_key = ((u64) (sw_if_index) << 32) | (u64) id;
1051 vnet_sw_interface_t template;
1055 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1057 p = hash_get_mem (im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
1060 return (VNET_API_ERROR_VLAN_ALREADY_EXISTS);
1063 clib_memset (&template, 0, sizeof (template));
1064 template.type = VNET_SW_INTERFACE_TYPE_SUB;
1065 template.flood_class = VNET_FLOOD_CLASS_NORMAL;
1066 template.sup_sw_if_index = sw_if_index;
1067 template.sub.id = id;
1068 template.sub.eth.raw_flags = flags;
1069 template.sub.eth.outer_vlan_id = outer_vlan_id;
1070 template.sub.eth.inner_vlan_id = inner_vlan_id;
1072 if (vnet_create_sw_interface (vnm, &template, sub_sw_if_index))
1073 return (VNET_API_ERROR_UNSPECIFIED);
1075 kp = clib_mem_alloc (sizeof (*kp));
1076 *kp = sup_and_sub_key;
1078 hash_set (hi->sub_interface_sw_if_index_by_id, id, *sub_sw_if_index);
1079 hash_set_mem (im->sw_if_index_by_sup_and_sub, kp, *sub_sw_if_index);
1085 vnet_delete_sub_interface (u32 sw_if_index)
1087 vnet_main_t *vnm = vnet_get_main ();
1088 vnet_sw_interface_t *si;
1091 if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
1092 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1094 si = vnet_get_sw_interface (vnm, sw_if_index);
1095 if (si->type == VNET_SW_INTERFACE_TYPE_SUB ||
1096 si->type == VNET_SW_INTERFACE_TYPE_PIPE ||
1097 si->type == VNET_SW_INTERFACE_TYPE_P2P)
1099 vnet_interface_main_t *im = &vnm->interface_main;
1100 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1101 u64 sup_and_sub_key =
1102 ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
1103 hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
1104 hash_unset (hi->sub_interface_sw_if_index_by_id, si->sub.id);
1105 vnet_delete_sw_interface (vnm, sw_if_index);
1108 rv = VNET_API_ERROR_INVALID_SUB_SW_IF_INDEX;
1113 static clib_error_t *
1114 delete_simulated_ethernet_interfaces (vlib_main_t * vm,
1115 unformat_input_t * input,
1116 vlib_cli_command_t * cmd)
1119 u32 sw_if_index = ~0;
1120 vnet_main_t *vnm = vnet_get_main ();
1122 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1124 if (unformat (input, "intfc %U",
1125 unformat_vnet_sw_interface, vnm, &sw_if_index))
1131 if (sw_if_index == ~0)
1132 return clib_error_return (0, "interface not specified");
1134 rv = vnet_delete_loopback_interface (sw_if_index);
1137 return clib_error_return (0, "vnet_delete_loopback_interface failed");
1142 static clib_error_t *
1143 delete_sub_interface (vlib_main_t * vm,
1144 unformat_input_t * input, vlib_cli_command_t * cmd)
1147 u32 sw_if_index = ~0;
1148 vnet_main_t *vnm = vnet_get_main ();
1150 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1153 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1158 if (sw_if_index == ~0)
1159 return clib_error_return (0, "interface doesn't exist");
1161 if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
1162 rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
1164 rv = vnet_delete_sub_interface (sw_if_index);
1166 return clib_error_return (0, "delete_subinterface_interface failed");
1171 * Delete a loopback interface.
1174 * The following two command syntaxes are equivalent:
1175 * @cliexcmd{loopback delete-interface intfc <interface>}
1176 * @cliexcmd{delete loopback interface intfc <interface>}
1177 * Example of how to delete a loopback interface:
1178 * @cliexcmd{loopback delete-interface intfc loop0}
1181 VLIB_CLI_COMMAND (delete_simulated_ethernet_interface_command, static) = {
1182 .path = "loopback delete-interface",
1183 .short_help = "loopback delete-interface intfc <interface>",
1184 .function = delete_simulated_ethernet_interfaces,
1189 * Delete a loopback interface.
1192 * The following two command syntaxes are equivalent:
1193 * @cliexcmd{loopback delete-interface intfc <interface>}
1194 * @cliexcmd{delete loopback interface intfc <interface>}
1195 * Example of how to delete a loopback interface:
1196 * @cliexcmd{delete loopback interface intfc loop0}
1199 VLIB_CLI_COMMAND (delete_loopback_interface_command, static) = {
1200 .path = "delete loopback interface",
1201 .short_help = "delete loopback interface intfc <interface>",
1202 .function = delete_simulated_ethernet_interfaces,
1207 * Delete a sub-interface.
1210 * Example of how to delete a sub-interface:
1211 * @cliexcmd{delete sub-interface GigabitEthernet0/8/0.200}
1214 VLIB_CLI_COMMAND (delete_sub_interface_command, static) = {
1215 .path = "delete sub-interface",
1216 .short_help = "delete sub-interface <interface>",
1217 .function = delete_sub_interface,
1221 /* ethernet { ... } configuration. */
1224 * @cfgcmd{default-mtu <n>}
1225 * Specify the default mtu in the range of 64-9000. The default is 9000 bytes.
1228 static clib_error_t *
1229 ethernet_config (vlib_main_t * vm, unformat_input_t * input)
1231 ethernet_main_t *em = ðernet_main;
1233 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1235 if (unformat (input, "default-mtu %u", &em->default_mtu))
1237 if (em->default_mtu < 64 || em->default_mtu > 9000)
1238 return clib_error_return (0, "default MTU must be >=64, <=9000");
1242 return clib_error_return (0, "unknown input '%U'",
1243 format_unformat_error, input);
1249 VLIB_CONFIG_FUNCTION (ethernet_config, "ethernet");
1252 * fd.io coding-style-patch-verification: ON
1255 * eval: (c-set-style "gnu")