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_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
317 ethernet_interface_t *ei =
318 pool_elt_at_index (ethernet_main.interfaces, hi->hw_instance);
320 if (ei->cb.set_max_frame_size)
321 return ei->cb.set_max_frame_size (vnm, hi, frame_size);
324 VNET_ERR_UNSUPPORTED,
325 "underlying driver doesn't support changing Max Frame Size");
329 VNET_HW_INTERFACE_CLASS (ethernet_hw_interface_class) = {
331 .tx_hash_fn_type = VNET_HASH_FN_TYPE_ETHERNET,
332 .format_address = format_ethernet_address,
333 .format_header = format_ethernet_header_with_length,
334 .unformat_hw_address = unformat_ethernet_address,
335 .unformat_header = unformat_ethernet_header,
336 .build_rewrite = ethernet_build_rewrite,
337 .update_adjacency = ethernet_update_adjacency,
338 .mac_addr_change_function = ethernet_mac_change,
339 .set_max_frame_size = ethernet_set_max_frame_size,
344 unformat_ethernet_interface (unformat_input_t * input, va_list * args)
346 vnet_main_t *vnm = va_arg (*args, vnet_main_t *);
347 u32 *result = va_arg (*args, u32 *);
349 ethernet_main_t *em = ðernet_main;
350 ethernet_interface_t *eif;
352 if (!unformat_user (input, unformat_vnet_hw_interface, vnm, &hw_if_index))
355 eif = ethernet_get_interface (em, hw_if_index);
358 *result = hw_if_index;
365 vnet_eth_register_interface (vnet_main_t *vnm,
366 vnet_eth_interface_registration_t *r)
368 ethernet_main_t *em = ðernet_main;
369 ethernet_interface_t *ei;
370 vnet_hw_interface_t *hi;
373 pool_get (em->interfaces, ei);
374 clib_memcpy (&ei->cb, &r->cb, sizeof (vnet_eth_if_callbacks_t));
376 hw_if_index = vnet_register_interface (
377 vnm, r->dev_class_index, r->dev_instance,
378 ethernet_hw_interface_class.index, ei - em->interfaces);
380 hi = vnet_get_hw_interface (vnm, hw_if_index);
382 ethernet_setup_node (vnm->vlib_main, hi->output_node_index);
384 hi->min_frame_size = ETHERNET_MIN_PACKET_BYTES;
388 sizeof (ethernet_header_t) + 2 * sizeof (ethernet_vlan_header_t);
389 hi->max_frame_size = r->max_frame_size ?
391 ethernet_main.default_mtu + hi->frame_overhead;
394 /* Default ethernet MTU, 9000 unless set by ethernet_config see below */
395 vnet_sw_interface_set_mtu (vnm, hi->sw_if_index, em->default_mtu);
397 ethernet_set_mac (hi, ei, r->address);
402 ethernet_delete_interface (vnet_main_t * vnm, u32 hw_if_index)
404 ethernet_main_t *em = ðernet_main;
405 ethernet_interface_t *ei;
406 vnet_hw_interface_t *hi;
407 main_intf_t *main_intf;
408 vlan_table_t *vlan_table;
411 hi = vnet_get_hw_interface (vnm, hw_if_index);
412 ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
414 /* Delete vlan mapping table for dot1q and dot1ad. */
415 main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
416 if (main_intf->dot1q_vlans)
418 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
419 for (idx = 0; idx < ETHERNET_N_VLAN; idx++)
421 if (vlan_table->vlans[idx].qinqs)
423 pool_put_index (em->qinq_pool, vlan_table->vlans[idx].qinqs);
424 vlan_table->vlans[idx].qinqs = 0;
427 pool_put_index (em->vlan_pool, main_intf->dot1q_vlans);
428 main_intf->dot1q_vlans = 0;
430 if (main_intf->dot1ad_vlans)
432 vlan_table = vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
433 for (idx = 0; idx < ETHERNET_N_VLAN; idx++)
435 if (vlan_table->vlans[idx].qinqs)
437 pool_put_index (em->qinq_pool, vlan_table->vlans[idx].qinqs);
438 vlan_table->vlans[idx].qinqs = 0;
441 pool_put_index (em->vlan_pool, main_intf->dot1ad_vlans);
442 main_intf->dot1ad_vlans = 0;
445 vnet_delete_hw_interface (vnm, hw_if_index);
446 pool_put (em->interfaces, ei);
450 ethernet_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
452 ethernet_main_t *em = ðernet_main;
453 vnet_hw_interface_t *hi;
454 ethernet_interface_t *ei;
455 u32 opn_flags = flags & ETHERNET_INTERFACE_FLAGS_SET_OPN_MASK;
457 hi = vnet_get_hw_interface (vnm, hw_if_index);
459 ASSERT (hi->hw_class_index == ethernet_hw_interface_class.index);
461 ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
463 /* preserve status bits and update last set operation bits */
464 ei->flags = (ei->flags & ETHERNET_INTERFACE_FLAGS_STATUS_MASK) | opn_flags;
466 if (ei->cb.flag_change)
470 case ETHERNET_INTERFACE_FLAG_DEFAULT_L3:
471 if (hi->caps & VNET_HW_IF_CAP_MAC_FILTER)
473 if (ei->cb.flag_change (vnm, hi, opn_flags) != ~0)
475 ei->flags |= ETHERNET_INTERFACE_FLAG_STATUS_L3;
478 ei->flags &= ~ETHERNET_INTERFACE_FLAG_STATUS_L3;
482 case ETHERNET_INTERFACE_FLAG_ACCEPT_ALL:
483 ei->flags &= ~ETHERNET_INTERFACE_FLAG_STATUS_L3;
484 return ei->cb.flag_change (vnm, hi, opn_flags);
493 * Echo packets back to ethernet/l2-input.
496 simulated_ethernet_interface_tx (vlib_main_t * vm,
497 vlib_node_runtime_t *
498 node, vlib_frame_t * frame)
500 u32 n_left_from, *from;
503 u32 thread_index = vm->thread_index;
504 vnet_main_t *vnm = vnet_get_main ();
505 vnet_interface_main_t *im = &vnm->interface_main;
506 l2_input_config_t *config;
507 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
508 u16 nexts[VLIB_FRAME_SIZE], *next;
509 u32 new_rx_sw_if_index = ~0;
510 u32 new_tx_sw_if_index = ~0;
512 n_left_from = frame->n_vectors;
513 from = vlib_frame_vector_args (frame);
515 vlib_get_buffers (vm, from, bufs, n_left_from);
519 /* Ordinarily, this is the only config lookup. */
520 config = l2input_intf_config (vnet_buffer (b[0])->sw_if_index[VLIB_TX]);
521 next_index = (l2_input_is_bridge (config) ?
522 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
523 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
524 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
525 new_rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
527 while (n_left_from >= 4)
529 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
532 /* Prefetch next iteration. */
533 if (PREDICT_TRUE (n_left_from >= 8))
535 vlib_prefetch_buffer_header (b[4], STORE);
536 vlib_prefetch_buffer_header (b[5], STORE);
537 vlib_prefetch_buffer_header (b[6], STORE);
538 vlib_prefetch_buffer_header (b[7], STORE);
541 /* Make sure all pkts were transmitted on the same (loop) intfc */
542 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
543 sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
544 sw_if_index2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
545 sw_if_index3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
547 xor_ifx4 = u32x4_gather (&sw_if_index0, &sw_if_index1, &sw_if_index2,
550 /* Speed path / expected case: all pkts on the same intfc */
551 if (PREDICT_TRUE (u32x4_is_all_equal (xor_ifx4, new_rx_sw_if_index)))
553 next[0] = next_index;
554 next[1] = next_index;
555 next[2] = next_index;
556 next[3] = next_index;
557 vnet_buffer (b[0])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
558 vnet_buffer (b[1])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
559 vnet_buffer (b[2])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
560 vnet_buffer (b[3])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
561 vnet_buffer (b[0])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
562 vnet_buffer (b[1])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
563 vnet_buffer (b[2])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
564 vnet_buffer (b[3])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
565 n_bytes = vlib_buffer_length_in_chain (vm, b[0]);
566 n_bytes += vlib_buffer_length_in_chain (vm, b[1]);
567 n_bytes += vlib_buffer_length_in_chain (vm, b[2]);
568 n_bytes += vlib_buffer_length_in_chain (vm, b[3]);
570 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
572 vnet_update_l2_len (b[0]);
573 vnet_update_l2_len (b[1]);
574 vnet_update_l2_len (b[2]);
575 vnet_update_l2_len (b[3]);
578 /* increment TX interface stat */
579 vlib_increment_combined_counter (im->combined_sw_if_counters +
580 VNET_INTERFACE_COUNTER_TX,
581 thread_index, new_rx_sw_if_index,
582 4 /* pkts */ , n_bytes);
590 * Slow path: we know that at least one of the pkts
591 * was transmitted on a different sw_if_index, so
592 * check each sw_if_index against the cached data and proceed
595 * This shouldn't happen, but code can (and does) bypass the
596 * per-interface output node, so deal with it.
598 if (PREDICT_FALSE (vnet_buffer (b[0])->sw_if_index[VLIB_TX]
599 != new_rx_sw_if_index))
601 config = l2input_intf_config
602 (vnet_buffer (b[0])->sw_if_index[VLIB_TX]);
603 next_index = (l2_input_is_bridge (config) ?
604 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
605 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
606 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
607 new_rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
609 next[0] = next_index;
610 vnet_buffer (b[0])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
611 vnet_buffer (b[0])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
612 n_bytes = vlib_buffer_length_in_chain (vm, b[0]);
613 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
614 vnet_update_l2_len (b[0]);
616 vlib_increment_combined_counter (im->combined_sw_if_counters +
617 VNET_INTERFACE_COUNTER_TX,
618 thread_index, new_rx_sw_if_index,
619 1 /* pkts */ , n_bytes);
621 if (PREDICT_FALSE (vnet_buffer (b[1])->sw_if_index[VLIB_TX]
622 != new_rx_sw_if_index))
624 config = l2input_intf_config
625 (vnet_buffer (b[1])->sw_if_index[VLIB_TX]);
626 next_index = (l2_input_is_bridge (config) ?
627 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
628 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
629 new_rx_sw_if_index = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
630 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
632 next[1] = next_index;
633 vnet_buffer (b[1])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
634 vnet_buffer (b[1])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
635 n_bytes = vlib_buffer_length_in_chain (vm, b[1]);
636 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
637 vnet_update_l2_len (b[1]);
639 vlib_increment_combined_counter (im->combined_sw_if_counters +
640 VNET_INTERFACE_COUNTER_TX,
641 thread_index, new_rx_sw_if_index,
642 1 /* pkts */ , n_bytes);
644 if (PREDICT_FALSE (vnet_buffer (b[2])->sw_if_index[VLIB_TX]
645 != new_rx_sw_if_index))
647 config = l2input_intf_config
648 (vnet_buffer (b[2])->sw_if_index[VLIB_TX]);
649 next_index = (l2_input_is_bridge (config) ?
650 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
651 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
652 new_rx_sw_if_index = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
653 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
655 next[2] = next_index;
656 vnet_buffer (b[2])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
657 vnet_buffer (b[2])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
658 n_bytes = vlib_buffer_length_in_chain (vm, b[2]);
659 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
660 vnet_update_l2_len (b[2]);
662 vlib_increment_combined_counter (im->combined_sw_if_counters +
663 VNET_INTERFACE_COUNTER_TX,
664 thread_index, new_rx_sw_if_index,
665 1 /* pkts */ , n_bytes);
667 if (PREDICT_FALSE (vnet_buffer (b[3])->sw_if_index[VLIB_TX]
668 != new_rx_sw_if_index))
670 config = l2input_intf_config
671 (vnet_buffer (b[3])->sw_if_index[VLIB_TX]);
672 next_index = (l2_input_is_bridge (config) ?
673 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
674 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
675 new_rx_sw_if_index = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
676 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
678 next[3] = next_index;
679 vnet_buffer (b[3])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
680 vnet_buffer (b[3])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
681 n_bytes = vlib_buffer_length_in_chain (vm, b[3]);
682 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
683 vnet_update_l2_len (b[3]);
685 vlib_increment_combined_counter (im->combined_sw_if_counters +
686 VNET_INTERFACE_COUNTER_TX,
687 thread_index, new_rx_sw_if_index,
688 1 /* pkts */ , n_bytes);
693 while (n_left_from > 0)
695 if (PREDICT_FALSE (vnet_buffer (b[0])->sw_if_index[VLIB_TX]
696 != new_rx_sw_if_index))
698 config = l2input_intf_config
699 (vnet_buffer (b[0])->sw_if_index[VLIB_TX]);
700 next_index = (l2_input_is_bridge (config) ?
701 VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT :
702 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
703 new_tx_sw_if_index = l2_input_is_bvi (config) ? L2INPUT_BVI : ~0;
704 new_rx_sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
706 next[0] = next_index;
707 vnet_buffer (b[0])->sw_if_index[VLIB_RX] = new_rx_sw_if_index;
708 vnet_buffer (b[0])->sw_if_index[VLIB_TX] = new_tx_sw_if_index;
709 n_bytes = vlib_buffer_length_in_chain (vm, b[0]);
710 if (next_index == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT)
711 vnet_update_l2_len (b[0]);
713 vlib_increment_combined_counter (im->combined_sw_if_counters +
714 VNET_INTERFACE_COUNTER_TX,
715 thread_index, new_rx_sw_if_index,
716 1 /* pkts */ , n_bytes);
722 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
724 return frame->n_vectors;
728 format_simulated_ethernet_name (u8 * s, va_list * args)
730 u32 dev_instance = va_arg (*args, u32);
731 return format (s, "loop%d", dev_instance);
734 static clib_error_t *
735 simulated_ethernet_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
738 u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
739 VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
740 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
744 static clib_error_t *
745 simulated_ethernet_mac_change (vnet_hw_interface_t * hi,
746 const u8 * old_address, const u8 * mac_address)
748 l2input_interface_mac_change (hi->sw_if_index, old_address, mac_address);
755 VNET_DEVICE_CLASS (ethernet_simulated_device_class) = {
757 .format_device_name = format_simulated_ethernet_name,
758 .tx_function = simulated_ethernet_interface_tx,
759 .admin_up_down_function = simulated_ethernet_admin_up_down,
760 .mac_addr_change_function = simulated_ethernet_mac_change,
765 * Maintain a bitmap of allocated loopback instance numbers.
767 #define LOOPBACK_MAX_INSTANCE (16 * 1024)
770 loopback_instance_alloc (u8 is_specified, u32 want)
772 ethernet_main_t *em = ðernet_main;
775 * Check for dynamically allocaetd instance number.
781 bit = clib_bitmap_first_clear (em->bm_loopback_instances);
782 if (bit >= LOOPBACK_MAX_INSTANCE)
786 em->bm_loopback_instances = clib_bitmap_set (em->bm_loopback_instances,
794 if (want >= LOOPBACK_MAX_INSTANCE)
802 if (clib_bitmap_get (em->bm_loopback_instances, want))
808 * Grant allocation request.
810 em->bm_loopback_instances = clib_bitmap_set (em->bm_loopback_instances,
817 loopback_instance_free (u32 instance)
819 ethernet_main_t *em = ðernet_main;
821 if (instance >= LOOPBACK_MAX_INSTANCE)
826 if (clib_bitmap_get (em->bm_loopback_instances, instance) == 0)
831 em->bm_loopback_instances = clib_bitmap_set (em->bm_loopback_instances,
837 vnet_create_loopback_interface (u32 * sw_if_indexp, u8 * mac_address,
838 u8 is_specified, u32 user_instance)
840 vnet_main_t *vnm = vnet_get_main ();
841 vlib_main_t *vm = vlib_get_main ();
845 vnet_hw_interface_t *hw_if;
848 ASSERT (sw_if_indexp);
850 *sw_if_indexp = (u32) ~ 0;
852 clib_memset (address, 0, sizeof (address));
855 * Allocate a loopback instance. Either select on dynamically
856 * or try to use the desired user_instance number.
858 instance = loopback_instance_alloc (is_specified, user_instance);
861 return VNET_API_ERROR_INVALID_REGISTRATION;
865 * Default MAC address (dead:0000:0000 + instance) is allocated
866 * if zero mac_address is configured. Otherwise, user-configurable MAC
867 * address is programmed on the loopback interface.
869 if (memcmp (address, mac_address, sizeof (address)))
870 clib_memcpy (address, mac_address, sizeof (address));
875 address[5] = instance;
878 vnet_eth_interface_registration_t eir = {};
879 eir.dev_class_index = ethernet_simulated_device_class.index;
880 eir.dev_instance = instance;
881 eir.address = address;
882 hw_if_index = vnet_eth_register_interface (vnm, &eir);
883 hw_if = vnet_get_hw_interface (vnm, hw_if_index);
884 slot = vlib_node_add_named_next_with_slot
885 (vm, hw_if->tx_node_index,
886 "ethernet-input", VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
887 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
889 slot = vlib_node_add_named_next_with_slot
890 (vm, hw_if->tx_node_index,
891 "l2-input", VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT);
892 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_L2_INPUT);
895 vnet_sw_interface_t *si = vnet_get_hw_sw_interface (vnm, hw_if_index);
896 *sw_if_indexp = si->sw_if_index;
898 /* By default don't flood to loopbacks, as packets just keep
899 * coming back ... If this loopback becomes a BVI, we'll change it */
900 si->flood_class = VNET_FLOOD_CLASS_NO_FLOOD;
906 static clib_error_t *
907 create_simulated_ethernet_interfaces (vlib_main_t * vm,
908 unformat_input_t * input,
909 vlib_cli_command_t * cmd)
915 u32 user_instance = 0;
917 clib_memset (mac_address, 0, sizeof (mac_address));
919 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
921 if (unformat (input, "mac %U", unformat_ethernet_address, mac_address))
923 if (unformat (input, "instance %d", &user_instance))
929 rv = vnet_create_loopback_interface (&sw_if_index, mac_address,
930 is_specified, user_instance);
933 return clib_error_return (0, "vnet_create_loopback_interface failed");
935 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
941 * Create a loopback interface. Optionally, a MAC Address can be
942 * provided. If not provided, de:ad:00:00:00:<loopId> will be used.
945 * The following two command syntaxes are equivalent:
946 * @cliexcmd{loopback create-interface [mac <mac-addr>] [instance <instance>]}
947 * @cliexcmd{create loopback interface [mac <mac-addr>] [instance <instance>]}
948 * Example of how to create a loopback interface:
949 * @cliexcmd{loopback create-interface}
952 VLIB_CLI_COMMAND (create_simulated_ethernet_interface_command, static) = {
953 .path = "loopback create-interface",
954 .short_help = "loopback create-interface [mac <mac-addr>] [instance <instance>]",
955 .function = create_simulated_ethernet_interfaces,
960 * Create a loopback interface. Optionally, a MAC Address can be
961 * provided. If not provided, de:ad:00:00:00:<loopId> will be used.
964 * The following two command syntaxes are equivalent:
965 * @cliexcmd{loopback create-interface [mac <mac-addr>] [instance <instance>]}
966 * @cliexcmd{create loopback interface [mac <mac-addr>] [instance <instance>]}
967 * Example of how to create a loopback interface:
968 * @cliexcmd{create loopback interface}
971 VLIB_CLI_COMMAND (create_loopback_interface_command, static) = {
972 .path = "create loopback interface",
973 .short_help = "create loopback interface [mac <mac-addr>] [instance <instance>]",
974 .function = create_simulated_ethernet_interfaces,
978 ethernet_interface_t *
979 ethernet_get_interface (ethernet_main_t * em, u32 hw_if_index)
981 vnet_hw_interface_t *i =
982 vnet_get_hw_interface (vnet_get_main (), hw_if_index);
983 return (i->hw_class_index ==
984 ethernet_hw_interface_class.
985 index ? pool_elt_at_index (em->interfaces, i->hw_instance) : 0);
989 ethernet_interface_add_del_address (ethernet_main_t * em,
990 u32 hw_if_index, const u8 * address,
993 ethernet_interface_t *ei = ethernet_get_interface (em, hw_if_index);
994 ethernet_interface_address_t *if_addr = 0;
997 /* return if there is not an ethernet interface for this hw interface */
1001 /* determine whether the address is configured on the interface */
1002 vec_foreach (if_addr, ei->secondary_addrs)
1004 if (ethernet_mac_address_equal (if_addr->mac.bytes, address))
1015 /* address not found yet: add it */
1016 vec_add2 (ei->secondary_addrs, if_addr, 1);
1017 ethernet_interface_address_copy (if_addr, address);
1019 return &if_addr->mac;
1024 vec_delete (ei->secondary_addrs, 1, if_addr - ei->secondary_addrs);
1030 vnet_delete_loopback_interface (u32 sw_if_index)
1032 vnet_main_t *vnm = vnet_get_main ();
1034 if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
1035 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1037 vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1038 if (hw == 0 || hw->dev_class_index != ethernet_simulated_device_class.index)
1039 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1041 if (loopback_instance_free (hw->dev_instance) < 0)
1042 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1044 ethernet_delete_interface (vnm, hw->hw_if_index);
1050 vnet_create_sub_interface (u32 sw_if_index, u32 id,
1051 u32 flags, u16 inner_vlan_id, u16 outer_vlan_id,
1052 u32 * sub_sw_if_index)
1054 vnet_main_t *vnm = vnet_get_main ();
1055 vnet_interface_main_t *im = &vnm->interface_main;
1056 vnet_hw_interface_t *hi;
1057 u64 sup_and_sub_key = ((u64) (sw_if_index) << 32) | (u64) id;
1058 vnet_sw_interface_t template;
1062 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1064 p = hash_get_mem (im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
1067 return (VNET_API_ERROR_VLAN_ALREADY_EXISTS);
1070 clib_memset (&template, 0, sizeof (template));
1071 template.type = VNET_SW_INTERFACE_TYPE_SUB;
1072 template.flood_class = VNET_FLOOD_CLASS_NORMAL;
1073 template.sup_sw_if_index = sw_if_index;
1074 template.sub.id = id;
1075 template.sub.eth.raw_flags = flags;
1076 template.sub.eth.outer_vlan_id = outer_vlan_id;
1077 template.sub.eth.inner_vlan_id = inner_vlan_id;
1079 if (vnet_create_sw_interface (vnm, &template, sub_sw_if_index))
1080 return (VNET_API_ERROR_UNSPECIFIED);
1082 kp = clib_mem_alloc (sizeof (*kp));
1083 *kp = sup_and_sub_key;
1085 hash_set (hi->sub_interface_sw_if_index_by_id, id, *sub_sw_if_index);
1086 hash_set_mem (im->sw_if_index_by_sup_and_sub, kp, *sub_sw_if_index);
1092 vnet_delete_sub_interface (u32 sw_if_index)
1094 vnet_main_t *vnm = vnet_get_main ();
1095 vnet_sw_interface_t *si;
1098 if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
1099 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
1101 si = vnet_get_sw_interface (vnm, sw_if_index);
1102 if (si->type == VNET_SW_INTERFACE_TYPE_SUB ||
1103 si->type == VNET_SW_INTERFACE_TYPE_PIPE ||
1104 si->type == VNET_SW_INTERFACE_TYPE_P2P)
1106 vnet_interface_main_t *im = &vnm->interface_main;
1107 vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1108 u64 sup_and_sub_key =
1109 ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
1110 hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
1111 hash_unset (hi->sub_interface_sw_if_index_by_id, si->sub.id);
1112 vnet_delete_sw_interface (vnm, sw_if_index);
1115 rv = VNET_API_ERROR_INVALID_SUB_SW_IF_INDEX;
1120 static clib_error_t *
1121 delete_simulated_ethernet_interfaces (vlib_main_t * vm,
1122 unformat_input_t * input,
1123 vlib_cli_command_t * cmd)
1126 u32 sw_if_index = ~0;
1127 vnet_main_t *vnm = vnet_get_main ();
1129 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1131 if (unformat (input, "intfc %U",
1132 unformat_vnet_sw_interface, vnm, &sw_if_index))
1138 if (sw_if_index == ~0)
1139 return clib_error_return (0, "interface not specified");
1141 rv = vnet_delete_loopback_interface (sw_if_index);
1144 return clib_error_return (0, "vnet_delete_loopback_interface failed");
1149 static clib_error_t *
1150 delete_sub_interface (vlib_main_t * vm,
1151 unformat_input_t * input, vlib_cli_command_t * cmd)
1154 u32 sw_if_index = ~0;
1155 vnet_main_t *vnm = vnet_get_main ();
1157 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1160 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1165 if (sw_if_index == ~0)
1166 return clib_error_return (0, "interface doesn't exist");
1168 if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
1169 rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
1171 rv = vnet_delete_sub_interface (sw_if_index);
1173 return clib_error_return (0, "delete_subinterface_interface failed");
1178 * Delete a loopback interface.
1181 * The following two command syntaxes are equivalent:
1182 * @cliexcmd{loopback delete-interface intfc <interface>}
1183 * @cliexcmd{delete loopback interface intfc <interface>}
1184 * Example of how to delete a loopback interface:
1185 * @cliexcmd{loopback delete-interface intfc loop0}
1188 VLIB_CLI_COMMAND (delete_simulated_ethernet_interface_command, static) = {
1189 .path = "loopback delete-interface",
1190 .short_help = "loopback delete-interface intfc <interface>",
1191 .function = delete_simulated_ethernet_interfaces,
1196 * Delete a loopback interface.
1199 * The following two command syntaxes are equivalent:
1200 * @cliexcmd{loopback delete-interface intfc <interface>}
1201 * @cliexcmd{delete loopback interface intfc <interface>}
1202 * Example of how to delete a loopback interface:
1203 * @cliexcmd{delete loopback interface intfc loop0}
1206 VLIB_CLI_COMMAND (delete_loopback_interface_command, static) = {
1207 .path = "delete loopback interface",
1208 .short_help = "delete loopback interface intfc <interface>",
1209 .function = delete_simulated_ethernet_interfaces,
1214 * Delete a sub-interface.
1217 * Example of how to delete a sub-interface:
1218 * @cliexcmd{delete sub-interface GigabitEthernet0/8/0.200}
1221 VLIB_CLI_COMMAND (delete_sub_interface_command, static) = {
1222 .path = "delete sub-interface",
1223 .short_help = "delete sub-interface <interface>",
1224 .function = delete_sub_interface,
1228 /* ethernet { ... } configuration. */
1231 * @cfgcmd{default-mtu <n>}
1232 * Specify the default mtu in the range of 64-9000. The default is 9000 bytes.
1235 static clib_error_t *
1236 ethernet_config (vlib_main_t * vm, unformat_input_t * input)
1238 ethernet_main_t *em = ðernet_main;
1240 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1242 if (unformat (input, "default-mtu %u", &em->default_mtu))
1244 if (em->default_mtu < 64 || em->default_mtu > 9000)
1245 return clib_error_return (0, "default MTU must be >=64, <=9000");
1249 return clib_error_return (0, "unknown input '%U'",
1250 format_unformat_error, input);
1256 VLIB_CONFIG_FUNCTION (ethernet_config, "ethernet");
1259 * fd.io coding-style-patch-verification: ON
1262 * eval: (c-set-style "gnu")