2 * l2_input.c : layer 2 input packet processing
4 * Copyright (c) 2013 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vlib/vlib.h>
19 #include <vnet/vnet.h>
20 #include <vnet/pg/pg.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vnet/ethernet/packet.h>
23 #include <vnet/ip/ip_packet.h>
24 #include <vnet/ip/ip4_packet.h>
25 #include <vnet/ip/ip6_packet.h>
27 #include <vnet/l2/l2_input.h>
28 #include <vnet/l2/l2_output.h>
29 #include <vnet/l2/feat_bitmap.h>
30 #include <vnet/l2/l2_bvi.h>
31 #include <vnet/l2/l2_fib.h>
32 #include <vnet/l2/l2_bd.h>
34 #include <vppinfra/error.h>
35 #include <vppinfra/hash.h>
36 #include <vppinfra/cache.h>
40 * @brief Interface Input Mode (Layer 2 Cross-Connect or Bridge / Layer 3).
42 * This file contains the CLI Commands that modify the input mode of an
43 * interface. For interfaces in a Layer 2 cross-connect, all packets
44 * received on one interface will be transmitted to the other. For
45 * interfaces in a bridge-domain, packets will be forwarded to other
46 * interfaces in the same bridge-domain based on destination mac address.
47 * For interfaces in Layer 3 mode, the packets will be routed.
50 /* Feature graph node names */
51 static char *l2input_feat_names[] = {
52 #define _(sym,name) name,
58 l2input_get_feat_names (void)
60 return l2input_feat_names;
64 format_l2_input_features (u8 * s, va_list * args)
66 static char *display_names[] = {
67 #define _(sym,name) #sym,
71 u32 feature_bitmap = va_arg (*args, u32);
73 if (feature_bitmap == 0)
75 s = format (s, " none configured");
79 feature_bitmap &= ~L2INPUT_FEAT_DROP; /* Not a feature */
81 for (i = L2INPUT_N_FEAT; i >= 0; i--)
82 if (feature_bitmap & (1 << i))
83 s = format (s, "%10s (%s)\n", display_names[i], l2input_feat_names[i]);
89 /* per-pkt trace data */
96 /* packet trace format function */
98 format_l2input_trace (u8 * s, va_list * args)
100 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
101 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
102 l2input_trace_t *t = va_arg (*args, l2input_trace_t *);
104 s = format (s, "l2-input: sw_if_index %d dst %U src %U",
106 format_ethernet_address, t->dst,
107 format_ethernet_address, t->src);
111 l2input_main_t l2input_main;
113 #define foreach_l2input_error \
114 _(L2INPUT, "L2 input packets") \
115 _(DROP, "L2 input drops")
119 #define _(sym,str) L2INPUT_ERROR_##sym,
120 foreach_l2input_error
125 static char *l2input_error_strings[] = {
126 #define _(sym,string) string,
127 foreach_l2input_error
140 static_always_inline void
141 classify_and_dispatch (l2input_main_t * msm, vlib_buffer_t * b0, u32 * next0)
144 * Load L2 input feature struct
145 * Load bridge domain struct
146 * Parse ethernet header to determine unicast/mcast/broadcast
148 * classify packet as IP/UDP/TCP, control, other
149 * mask feature bitmap
150 * go to first node in bitmap
151 * Later: optimize VTM
154 * set tx sw-if-handle
159 l2_input_config_t *config;
160 l2_bridge_domain_t *bd_config;
164 ethernet_header_t *h0;
168 #define get_u16(addr) ( *((u16 *)(addr)) )
170 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
172 h0 = vlib_buffer_get_current (b0);
173 l3h0 = (u8 *) h0 + vnet_buffer (b0)->l2.l2_len;
175 ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2));
178 /* Get config for the input interface */
179 config = vec_elt_at_index (msm->configs, sw_if_index0);
181 /* Save split horizon group */
182 vnet_buffer (b0)->l2.shg = config->shg;
184 /* determine layer2 kind for stat and mask */
185 if (PREDICT_FALSE (ethernet_address_cast (h0->dst_address)))
187 protocol = ((ip6_header_t *) l3h0)->protocol;
189 /* Disable bridge forwarding (flooding will execute instead if not xconnect) */
190 feat_mask &= ~(L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD);
192 /* Disable ARP-term for non-ARP and non-ICMP6 packet */
193 if (ethertype != ETHERNET_TYPE_ARP &&
194 (ethertype != ETHERNET_TYPE_IP6 || protocol != IP_PROTOCOL_ICMP6))
195 feat_mask &= ~(L2INPUT_FEAT_ARP_TERM);
197 * Check for from-BVI processing - set SHG of ARP/ICMP6 packets from BVI
198 * to 0 so it can also flood to VXLAN tunnels or other ports with the
199 * same SHG as that of the BVI.
201 else if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
203 vnet_buffer (b0)->l2.shg = 0;
208 * Check for from-BVI processing - set SHG of unicast packets from BVI
209 * to 0 so it is not dropped for VXLAN tunnels or other ports with the
210 * same SHG as that of the BVI.
212 if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
214 vnet_buffer (b0)->l2.shg = 0;
220 /* Do bridge-domain processing */
221 bd_index0 = config->bd_index;
222 /* save BD ID for next feature graph nodes */
223 vnet_buffer (b0)->l2.bd_index = bd_index0;
225 /* Get config for the bridge domain interface */
226 bd_config = vec_elt_at_index (msm->bd_configs, bd_index0);
228 /* Save bridge domain and interface seq_num */
230 l2fib_seq_num_t sn = {
231 .swif = *l2fib_swif_seq_num(sw_if_index0),
232 .bd = bd_config->seq_num,
235 vnet_buffer (b0)->l2.l2fib_sn = sn.as_u16;;
236 vnet_buffer (b0)->l2.bd_age = bd_config->mac_age;
239 * Process bridge domain feature enables.
240 * To perform learning/flooding/forwarding, the corresponding bit
241 * must be enabled in both the input interface config and in the
242 * bridge domain config. In the bd_bitmap, bits for features other
243 * than learning/flooding/forwarding should always be set.
245 feat_mask = feat_mask & bd_config->feature_bitmap;
247 else if (config->xconnect)
249 /* Set the output interface */
250 vnet_buffer (b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index;
253 feat_mask = L2INPUT_FEAT_DROP;
255 /* mask out features from bitmap using packet type and bd config */
256 feature_bitmap = config->feature_bitmap & feat_mask;
258 /* save for next feature graph nodes */
259 vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap;
261 /* Determine the next node */
262 *next0 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
266 static_always_inline uword
267 l2input_node_inline (vlib_main_t * vm,
268 vlib_node_runtime_t * node, vlib_frame_t * frame,
271 u32 n_left_from, *from, *to_next;
272 l2input_next_t next_index;
273 l2input_main_t *msm = &l2input_main;
275 from = vlib_frame_vector_args (frame);
276 n_left_from = frame->n_vectors; /* number of packets to process */
277 next_index = node->cached_next_index;
279 while (n_left_from > 0)
283 /* get space to enqueue frame to graph node "next_index" */
284 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
286 while (n_left_from >= 8 && n_left_to_next >= 4)
288 u32 bi0, bi1, bi2, bi3;
289 vlib_buffer_t *b0, *b1, *b2, *b3;
290 u32 next0, next1, next2, next3;
291 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
293 /* Prefetch next iteration. */
295 vlib_buffer_t *p4, *p5, *p6, *p7;
297 p4 = vlib_get_buffer (vm, from[4]);
298 p5 = vlib_get_buffer (vm, from[5]);
299 p6 = vlib_get_buffer (vm, from[6]);
300 p7 = vlib_get_buffer (vm, from[7]);
302 /* Prefetch the buffer header and packet for the N+2 loop iteration */
303 vlib_prefetch_buffer_header (p4, LOAD);
304 vlib_prefetch_buffer_header (p5, LOAD);
305 vlib_prefetch_buffer_header (p6, LOAD);
306 vlib_prefetch_buffer_header (p7, LOAD);
308 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
309 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
310 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
311 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
314 * Don't bother prefetching the bridge-domain config (which
315 * depends on the input config above). Only a small number of
316 * bridge domains are expected. Plus the structure is small
317 * and several fit in a cache line.
321 /* speculatively enqueue b0 and b1 to the current next frame */
322 /* bi is "buffer index", b is pointer to the buffer */
323 to_next[0] = bi0 = from[0];
324 to_next[1] = bi1 = from[1];
325 to_next[2] = bi2 = from[2];
326 to_next[3] = bi3 = from[3];
332 b0 = vlib_get_buffer (vm, bi0);
333 b1 = vlib_get_buffer (vm, bi1);
334 b2 = vlib_get_buffer (vm, bi2);
335 b3 = vlib_get_buffer (vm, bi3);
339 /* RX interface handles */
340 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
341 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
342 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX];
343 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX];
345 if (b0->flags & VLIB_BUFFER_IS_TRACED)
347 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
349 vlib_add_trace (vm, node, b0, sizeof (*t));
350 t->sw_if_index = sw_if_index0;
351 clib_memcpy (t->src, h0->src_address, 6);
352 clib_memcpy (t->dst, h0->dst_address, 6);
354 if (b1->flags & VLIB_BUFFER_IS_TRACED)
356 ethernet_header_t *h1 = vlib_buffer_get_current (b1);
358 vlib_add_trace (vm, node, b1, sizeof (*t));
359 t->sw_if_index = sw_if_index1;
360 clib_memcpy (t->src, h1->src_address, 6);
361 clib_memcpy (t->dst, h1->dst_address, 6);
363 if (b2->flags & VLIB_BUFFER_IS_TRACED)
365 ethernet_header_t *h2 = vlib_buffer_get_current (b2);
367 vlib_add_trace (vm, node, b2, sizeof (*t));
368 t->sw_if_index = sw_if_index2;
369 clib_memcpy (t->src, h2->src_address, 6);
370 clib_memcpy (t->dst, h2->dst_address, 6);
372 if (b3->flags & VLIB_BUFFER_IS_TRACED)
374 ethernet_header_t *h3 = vlib_buffer_get_current (b3);
376 vlib_add_trace (vm, node, b3, sizeof (*t));
377 t->sw_if_index = sw_if_index3;
378 clib_memcpy (t->src, h3->src_address, 6);
379 clib_memcpy (t->dst, h3->dst_address, 6);
383 vlib_node_increment_counter (vm, l2input_node.index,
384 L2INPUT_ERROR_L2INPUT, 4);
386 classify_and_dispatch (msm, b0, &next0);
387 classify_and_dispatch (msm, b1, &next1);
388 classify_and_dispatch (msm, b2, &next2);
389 classify_and_dispatch (msm, b3, &next3);
391 /* verify speculative enqueues, maybe switch current next frame */
392 /* if next0==next1==next_index then nothing special needs to be done */
393 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
394 to_next, n_left_to_next,
396 next0, next1, next2, next3);
399 while (n_left_from > 0 && n_left_to_next > 0)
406 /* speculatively enqueue b0 to the current next frame */
414 b0 = vlib_get_buffer (vm, bi0);
416 if (do_trace && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
418 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
419 l2input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
420 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
421 t->sw_if_index = sw_if_index0;
422 clib_memcpy (t->src, h0->src_address, 6);
423 clib_memcpy (t->dst, h0->dst_address, 6);
426 vlib_node_increment_counter (vm, l2input_node.index,
427 L2INPUT_ERROR_L2INPUT, 1);
429 classify_and_dispatch (msm, b0, &next0);
431 /* verify speculative enqueue, maybe switch current next frame */
432 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
433 to_next, n_left_to_next,
437 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
440 return frame->n_vectors;
444 l2input_node_fn (vlib_main_t * vm,
445 vlib_node_runtime_t * node, vlib_frame_t * frame)
447 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
448 return l2input_node_inline (vm, node, frame, 1 /* do_trace */ );
449 return l2input_node_inline (vm, node, frame, 0 /* do_trace */ );
453 VLIB_REGISTER_NODE (l2input_node) = {
454 .function = l2input_node_fn,
456 .vector_size = sizeof (u32),
457 .format_trace = format_l2input_trace,
458 .format_buffer = format_ethernet_header_with_length,
459 .type = VLIB_NODE_TYPE_INTERNAL,
461 .n_errors = ARRAY_LEN(l2input_error_strings),
462 .error_strings = l2input_error_strings,
464 .n_next_nodes = L2INPUT_N_NEXT,
466 /* edit / add dispositions here */
468 [L2INPUT_NEXT_LEARN] = "l2-learn",
469 [L2INPUT_NEXT_FWD] = "l2-fwd",
470 [L2INPUT_NEXT_DROP] = "error-drop",
475 VLIB_NODE_FUNCTION_MULTIARCH (l2input_node, l2input_node_fn)
476 clib_error_t *l2input_init (vlib_main_t * vm)
478 l2input_main_t *mp = &l2input_main;
481 mp->vnet_main = vnet_get_main ();
483 /* Get packets RX'd from L2 interfaces */
484 ethernet_register_l2_input (vm, l2input_node.index);
486 /* Create the config vector */
487 vec_validate (mp->configs, 100);
488 /* create 100 sw interface entries and zero them */
490 /* Initialize the feature next-node indexes */
491 feat_bitmap_init_next_nodes (vm,
494 l2input_get_feat_names (),
495 mp->feat_next_node_index);
500 VLIB_INIT_FUNCTION (l2input_init);
503 /** Get a pointer to the config for the given interface. */
505 l2input_intf_config (u32 sw_if_index)
507 l2input_main_t *mp = &l2input_main;
509 vec_validate (mp->configs, sw_if_index);
510 return vec_elt_at_index (mp->configs, sw_if_index);
513 /** Enable (or disable) the feature in the bitmap for the given interface. */
515 l2input_intf_bitmap_enable (u32 sw_if_index, u32 feature_bitmap, u32 enable)
517 l2_input_config_t *config = l2input_intf_config (sw_if_index);
520 config->feature_bitmap |= feature_bitmap;
522 config->feature_bitmap &= ~feature_bitmap;
524 return config->feature_bitmap;
528 l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value)
530 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);;
531 bd_validate (bd_config);
532 bd_config->feature_bitmap =
533 (bd_config->feature_bitmap & ~feat_mask) | feat_value;
534 return bd_config->feature_bitmap;
538 * Set the subinterface to run in l2 or l3 mode.
539 * For L3 mode, just the sw_if_index is specified.
540 * For bridged mode, the bd id and bvi flag are also specified.
541 * For xconnect mode, the peer sw_if_index is also specified.
542 * Return 0 if ok, or non-0 if there was an error.
546 set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, /* */
547 u32 mode, /* One of L2 modes or back to L3 mode */
548 u32 sw_if_index, /* sw interface index */
549 u32 bd_index, /* for bridged interface */
550 u32 bvi, /* the bridged interface is the BVI */
551 u32 shg, /* the bridged interface split horizon group */
552 u32 xc_sw_if_index) /* peer interface for xconnect */
554 l2input_main_t *mp = &l2input_main;
555 l2output_main_t *l2om = &l2output_main;
556 vnet_main_t *vnm = vnet_get_main ();
557 vnet_hw_interface_t *hi;
558 l2_output_config_t *out_config;
559 l2_input_config_t *config;
560 l2_bridge_domain_t *bd_config;
561 i32 l2_if_adjust = 0;
564 hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index);
565 config = l2input_intf_config (sw_if_index);
569 /* Interface is already in bridge mode. Undo the existing config. */
570 bd_config = vec_elt_at_index (mp->bd_configs, config->bd_index);
572 /* remove interface from flood vector */
573 bd_remove_member (bd_config, sw_if_index);
575 /* undo any BVI-related config */
576 if (bd_config->bvi_sw_if_index == sw_if_index)
578 bd_config->bvi_sw_if_index = ~0;
581 /* delete the l2fib entry for the bvi interface */
582 l2fib_del_entry (hi->hw_address, config->bd_index);
584 /* Make loop output node send packet back to ethernet-input node */
586 vlib_node_add_named_next_with_slot (vm, hi->tx_node_index,
588 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
589 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
592 /* Clear MACs learned on the interface */
593 if ((config->feature_bitmap & L2INPUT_FEAT_LEARN) ||
594 (bd_config->feature_bitmap & L2INPUT_FEAT_LEARN))
595 l2fib_flush_int_mac (vm, sw_if_index);
599 else if (config->xconnect)
604 /* Make sure vector is big enough */
605 vec_validate_init_empty (l2om->output_node_index_vec, sw_if_index,
608 /* Initialize the l2-input configuration for the interface */
611 /* Set L2 config to BD index 0 so that if any packet accidentally
612 * came in on L2 path, it will be dropped in BD 0 */
613 config->xconnect = 0;
616 config->bd_index = 0;
617 config->feature_bitmap = L2INPUT_FEAT_DROP;
619 /* Clear L2 output config */
620 out_config = l2output_intf_config (sw_if_index);
621 memset (out_config, 0, sizeof (l2_output_config_t));
623 /* Make sure any L2-output packet to this interface now in L3 mode is
624 * dropped. This may happen if L2 FIB MAC entry is stale */
625 l2om->output_node_index_vec[sw_if_index] = L2OUTPUT_NEXT_BAD_INTF;
629 /* Add or update l2-output node next-arc and output_node_index_vec table
630 * for the interface */
631 l2output_create_output_node_mapping (vm, vnet_main, sw_if_index);
633 if (mode == MODE_L2_BRIDGE)
636 * Remove a check that the interface must be an Ethernet.
637 * Specifically so we can bridge to L3 tunnel interfaces.
639 * if (hi->hw_class_index != ethernet_hw_interface_class.index)
643 return MODE_ERROR_ETH; /* non-ethernet */
645 config->xconnect = 0;
647 config->bd_index = bd_index;
648 *l2fib_valid_swif_seq_num (sw_if_index) += 1;
651 * Enable forwarding, flooding, learning and ARP termination by default
652 * (note that ARP term is disabled on BD feature bitmap by default)
654 config->feature_bitmap |= L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD |
655 L2INPUT_FEAT_FLOOD | L2INPUT_FEAT_LEARN | L2INPUT_FEAT_ARP_TERM;
657 /* Make sure last-chance drop is configured */
658 config->feature_bitmap |= L2INPUT_FEAT_DROP;
660 /* Make sure xconnect is disabled */
661 config->feature_bitmap &= ~L2INPUT_FEAT_XCONNECT;
663 /* Set up bridge domain */
664 bd_config = l2input_bd_config (bd_index);
665 bd_validate (bd_config);
667 /* TODO: think: add l2fib entry even for non-bvi interface? */
669 /* Do BVI interface initializations */
672 /* ensure BD has no bvi interface (or replace that one with this??) */
673 if (bd_config->bvi_sw_if_index != ~0)
675 return MODE_ERROR_BVI_DEF; /* bd already has a bvi interface */
677 bd_config->bvi_sw_if_index = sw_if_index;
680 /* create the l2fib entry for the bvi interface */
681 l2fib_add_fwd_entry (hi->hw_address, bd_index, sw_if_index, 1, 1); /* static + bvi */
683 /* Disable learning by default. no use since l2fib entry is static. */
684 config->feature_bitmap &= ~L2INPUT_FEAT_LEARN;
686 /* Make loop output node send packet to l2-input node */
688 vlib_node_add_named_next_with_slot (vm, hi->tx_node_index,
690 VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
691 ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT);
694 /* Add interface to bridge-domain flood vector */
695 l2_flood_member_t member = {
696 .sw_if_index = sw_if_index,
697 .flags = bvi ? L2_FLOOD_MEMBER_BVI : L2_FLOOD_MEMBER_NORMAL,
700 bd_add_member (bd_config, &member);
703 else if (mode == MODE_L2_XC)
705 config->xconnect = 1;
707 config->output_sw_if_index = xc_sw_if_index;
709 /* Make sure last-chance drop is configured */
710 config->feature_bitmap |= L2INPUT_FEAT_DROP;
712 /* Make sure bridging features are disabled */
713 config->feature_bitmap &=
714 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
716 config->feature_bitmap |= L2INPUT_FEAT_XCONNECT;
717 shg = 0; /* not used in xconnect */
719 else if (mode == MODE_L2_CLASSIFY)
721 config->xconnect = 1;
723 config->output_sw_if_index = xc_sw_if_index;
725 /* Make sure last-chance drop is configured */
726 config->feature_bitmap |=
727 L2INPUT_FEAT_DROP | L2INPUT_FEAT_INPUT_CLASSIFY;
729 /* Make sure bridging features are disabled */
730 config->feature_bitmap &=
731 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
732 shg = 0; /* not used in xconnect */
734 /* Insure all packets go to ethernet-input */
735 ethernet_set_rx_redirect (vnet_main, hi, 1);
738 /* set up split-horizon group and set output feature bit */
740 out_config = l2output_intf_config (sw_if_index);
741 out_config->shg = shg;
742 out_config->feature_bitmap |= L2OUTPUT_FEAT_OUTPUT;
745 * Test: remove this when non-IP features can be configured.
746 * Enable a non-IP feature to test IP feature masking
747 * config->feature_bitmap |= L2INPUT_FEAT_CTRL_PKT;
753 /* Adjust count of L2 interfaces */
754 hi->l2_if_count += l2_if_adjust;
756 if (hi->hw_class_index == ethernet_hw_interface_class.index)
758 if ((hi->l2_if_count == 1) && (l2_if_adjust == 1))
760 /* Just added first L2 interface on this port */
762 /* Set promiscuous mode on the l2 interface */
763 ethernet_set_flags (vnet_main, hi->hw_if_index,
764 ETHERNET_INTERFACE_FLAG_ACCEPT_ALL);
766 /* ensure all packets go to ethernet-input */
767 ethernet_set_rx_redirect (vnet_main, hi, 1);
770 else if ((hi->l2_if_count == 0) && (l2_if_adjust == -1))
772 /* Just removed only L2 subinterface on this port */
774 /* Disable promiscuous mode on the l2 interface */
775 ethernet_set_flags (vnet_main, hi->hw_if_index, 0);
777 /* Allow ip packets to go directly to ip4-input etc */
778 ethernet_set_rx_redirect (vnet_main, hi, 0);
782 /* Set up the L2/L3 flag in the interface parsing tables */
783 ethernet_sw_interface_set_l2_mode (vnm, sw_if_index, (mode != MODE_L3));
789 * Set subinterface in bridging mode with a bridge-domain ID.
791 * set interface l2 bridge <interface> <bd> [bvi] [split-horizon-group]
793 static clib_error_t *
794 int_l2_bridge (vlib_main_t * vm,
795 unformat_input_t * input, vlib_cli_command_t * cmd)
797 vnet_main_t *vnm = vnet_get_main ();
798 clib_error_t *error = 0;
805 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
807 error = clib_error_return (0, "unknown interface `%U'",
808 format_unformat_error, input);
812 if (!unformat (input, "%d", &bd_id))
814 error = clib_error_return (0, "expected bridge domain ID `%U'",
815 format_unformat_error, input);
819 if (bd_id > L2_BD_ID_MAX)
821 error = clib_error_return (0, "bridge domain ID exceed 16M limit",
822 format_unformat_error, input);
825 bd_index = bd_find_or_add_bd_index (&bd_main, bd_id);
828 bvi = unformat (input, "bvi");
830 /* optional split horizon group */
832 (void) unformat (input, "%d", &shg);
834 /* set the interface mode */
836 set_int_l2_mode (vm, vnm, MODE_L2_BRIDGE, sw_if_index, bd_index, bvi,
839 if (rc == MODE_ERROR_ETH)
841 error = clib_error_return (0, "bridged interface must be ethernet",
842 format_unformat_error, input);
844 else if (rc == MODE_ERROR_BVI_DEF)
847 clib_error_return (0, "bridge-domain already has a bvi interface",
848 format_unformat_error, input);
852 error = clib_error_return (0, "invalid configuration for interface",
853 format_unformat_error, input);
863 * Use this command put an interface into Layer 2 bridge domain. If a
864 * bridge-domain with the provided bridge-domain-id does not exist, it
865 * will be created. Interfaces in a bridge-domain forward packets to
866 * other interfaces in the same bridge-domain based on destination mac
867 * address. To remove an interface from a the Layer 2 bridge domain,
868 * put the interface in a different mode, for example Layer 3 mode.
870 * Optionally, an interface can be added to a Layer 2 bridge-domain as
871 * a Bridged Virtual Interface (bvi). Only one interface in a Layer 2
872 * bridge-domain can be a bvi.
874 * Optionally, a split-horizon group can also be specified. This defaults
875 * to 0 if not specified.
878 * Example of how to configure a Layer 2 bridge-domain with three
879 * interfaces (where 200 is the bridge-domain-id):
880 * @cliexcmd{set interface l2 bridge GigabitEthernet0/8/0.200 200}
881 * This interface is added a BVI interface:
882 * @cliexcmd{set interface l2 bridge GigabitEthernet0/9/0.200 200 bvi}
883 * This interface also has a split-horizon group of 1 specified:
884 * @cliexcmd{set interface l2 bridge GigabitEthernet0/a/0.200 200 1}
885 * Example of how to remove an interface from a Layer2 bridge-domain:
886 * @cliexcmd{set interface l3 GigabitEthernet0/a/0.200}
889 VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = {
890 .path = "set interface l2 bridge",
891 .short_help = "set interface l2 bridge <interface> <bridge-domain-id> [bvi] [shg]",
892 .function = int_l2_bridge,
897 * Set subinterface in xconnect mode with another interface.
899 * set interface l2 xconnect <interface> <peer interface>
901 static clib_error_t *
902 int_l2_xc (vlib_main_t * vm,
903 unformat_input_t * input, vlib_cli_command_t * cmd)
905 vnet_main_t *vnm = vnet_get_main ();
906 clib_error_t *error = 0;
910 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
912 error = clib_error_return (0, "unknown interface `%U'",
913 format_unformat_error, input);
918 (input, unformat_vnet_sw_interface, vnm, &xc_sw_if_index))
920 error = clib_error_return (0, "unknown peer interface `%U'",
921 format_unformat_error, input);
925 /* set the interface mode */
927 (vm, vnm, MODE_L2_XC, sw_if_index, 0, 0, 0, xc_sw_if_index))
929 error = clib_error_return (0, "invalid configuration for interface",
930 format_unformat_error, input);
939 * Use this command put an interface into Layer 2 cross-connect mode.
940 * Both interfaces must be in this mode for bi-directioal traffic. All
941 * packets received on one interface will be transmitted to the other.
942 * To remove the Layer 2 cross-connect, put the interface in a different
943 * mode, for example Layer 3 mode.
946 * Example of how to configure a Layer2 cross-connect between two interfaces:
947 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300}
948 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300}
949 * Example of how to remove a Layer2 cross-connect:
950 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.300}
951 * @cliexcmd{set interface l3 GigabitEthernet0/9/0.300}
954 VLIB_CLI_COMMAND (int_l2_xc_cli, static) = {
955 .path = "set interface l2 xconnect",
956 .short_help = "set interface l2 xconnect <interface> <peer interface>",
957 .function = int_l2_xc,
962 * Set subinterface in L3 mode.
964 * set interface l3 <interface>
966 static clib_error_t *
967 int_l3 (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
969 vnet_main_t *vnm = vnet_get_main ();
970 clib_error_t *error = 0;
973 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
975 error = clib_error_return (0, "unknown interface `%U'",
976 format_unformat_error, input);
980 /* set the interface mode */
981 if (set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0))
983 error = clib_error_return (0, "invalid configuration for interface",
984 format_unformat_error, input);
993 * Modify the packet processing mode of the interface to Layer 3, which
994 * implies packets will be routed. This is the default mode of an interface.
995 * Use this command to remove an interface from a Layer 2 cross-connect or a
999 * Example of how to set the mode of an interface to Layer 3:
1000 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.200}
1003 VLIB_CLI_COMMAND (int_l3_cli, static) = {
1004 .path = "set interface l3",
1005 .short_help = "set interface l3 <interface>",
1011 * Show interface mode.
1012 * The CLI format is:
1013 * show mode [<if-name1> <if-name2> ...]
1015 static clib_error_t *
1016 show_int_mode (vlib_main_t * vm,
1017 unformat_input_t * input, vlib_cli_command_t * cmd)
1019 vnet_main_t *vnm = vnet_get_main ();
1020 clib_error_t *error = 0;
1023 vnet_interface_main_t *im = &vnm->interface_main;
1025 vnet_sw_interface_t *si, *sis = 0;
1026 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1030 /* See if user wants to show specific interface */
1032 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1034 si = pool_elt_at_index (im->sw_interfaces, sw_if_index);
1035 vec_add1 (sis, si[0]);
1039 error = clib_error_return (0, "unknown input `%U'",
1040 format_unformat_error, input);
1045 if (vec_len (sis) == 0) /* Get all interfaces */
1047 /* Gather interfaces. */
1048 sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces));
1051 pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); }));
1055 vec_foreach (si, sis)
1057 l2_input_config_t *config = l2input_intf_config (si->sw_if_index);
1062 bd_id = l2input_main.bd_configs[config->bd_index].bd_id;
1064 args = format (0, "bd_id %d%s%d", bd_id,
1065 config->bvi ? " bvi shg " : " shg ", config->shg);
1067 else if (config->xconnect)
1069 mode = "l2 xconnect";
1070 args = format (0, "%U",
1071 format_vnet_sw_if_index_name,
1072 vnm, config->output_sw_if_index);
1077 args = format (0, " ");
1079 vlib_cli_output (vm, "%s %U %v\n",
1081 format_vnet_sw_if_index_name,
1082 vnm, si->sw_if_index, args);
1093 * Show the packet processing mode (Layer2 xcross-onnect, Layer 2 bridge,
1094 * Layer 3 routed) of all interfaces and sub-interfaces, or limit the
1095 * output to just the provided list of interfaces and sub-interfaces.
1096 * The output shows the mode, the interface, and if the interface is
1097 * a member of a bridge, the bridge-domain-id and the split horizen group (shg).
1100 * Example of displaying the mode of all interfaces:
1101 * @cliexstart{show mode}
1103 * l3 GigabitEthernet0/8/0
1104 * l3 GigabitEthernet0/9/0
1105 * l3 GigabitEthernet0/a/0
1106 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1107 * l2 bridge GigabitEthernet0/9/0.200 bd_id 200 shg 0
1108 * l2 bridge GigabitEthernet0/a/0.200 bd_id 200 shg 0
1109 * l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300
1110 * l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300
1112 * Example of displaying the mode of a seleted list of interfaces:
1113 * @cliexstart{show mode GigabitEthernet0/8/0 GigabitEthernet0/8/0.200}
1114 * l3 GigabitEthernet0/8/0
1115 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1119 VLIB_CLI_COMMAND (show_l2_mode, static) = {
1120 .path = "show mode",
1121 .short_help = "show mode [<if-name1> <if-name2> ...]",
1122 .function = show_int_mode,
1126 #define foreach_l2_init_function \
1127 _(feat_bitmap_drop_init) \
1129 _(l2_input_classify_init) \
1136 _(l2_efp_filter_init) \
1145 l2_init (vlib_main_t * vm)
1147 clib_error_t *error;
1150 if ((error = vlib_call_init_function (vm, a))) return error; } \
1152 foreach_l2_init_function;
1157 VLIB_INIT_FUNCTION (l2_init);
1160 * fd.io coding-style-patch-verification: ON
1163 * eval: (c-set-style "gnu")