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>
26 #include <vnet/fib/fib_node.h>
27 #include <vnet/ethernet/arp_packet.h>
29 #include <vnet/l2/l2_input.h>
30 #include <vnet/l2/l2_output.h>
31 #include <vnet/l2/feat_bitmap.h>
32 #include <vnet/l2/l2_bvi.h>
33 #include <vnet/l2/l2_fib.h>
34 #include <vnet/l2/l2_bd.h>
36 #include <vppinfra/error.h>
37 #include <vppinfra/hash.h>
38 #include <vppinfra/cache.h>
42 * @brief Interface Input Mode (Layer 2 Cross-Connect or Bridge / Layer 3).
44 * This file contains the CLI Commands that modify the input mode of an
45 * interface. For interfaces in a Layer 2 cross-connect, all packets
46 * received on one interface will be transmitted to the other. For
47 * interfaces in a bridge-domain, packets will be forwarded to other
48 * interfaces in the same bridge-domain based on destination mac address.
49 * For interfaces in Layer 3 mode, the packets will be routed.
52 #ifndef CLIB_MARCH_VARIANT
54 /* Feature graph node names */
55 static char *l2input_feat_names[] = {
56 #define _(sym,name) name,
62 l2input_get_feat_names (void)
64 return l2input_feat_names;
68 format_l2_input_features (u8 * s, va_list * args)
70 static char *display_names[] = {
71 #define _(sym,name) #sym,
75 u32 feature_bitmap = va_arg (*args, u32);
76 u32 verbose = va_arg (*args, u32);
78 if (feature_bitmap == 0)
80 s = format (s, " none configured");
84 feature_bitmap &= ~L2INPUT_FEAT_DROP; /* Not a feature */
86 for (i = L2INPUT_N_FEAT - 1; i >= 0; i--)
88 if (feature_bitmap & (1 << i))
91 s = format (s, "%17s (%s)\n",
92 display_names[i], l2input_feat_names[i]);
94 s = format (s, "%s ", l2input_feat_names[i]);
99 #endif /* CLIB_MARCH_VARIANT */
103 /* per-pkt trace data */
109 /* packet trace format function */
111 format_l2input_trace (u8 * s, va_list * args)
113 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
114 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
115 l2input_trace_t *t = va_arg (*args, l2input_trace_t *);
117 s = format (s, "l2-input: sw_if_index %d dst %U src %U",
119 format_ethernet_address, t->dst_and_src,
120 format_ethernet_address, t->dst_and_src + 6);
124 extern l2input_main_t l2input_main;
126 #ifndef CLIB_MARCH_VARIANT
127 l2input_main_t l2input_main;
128 #endif /* CLIB_MARCH_VARIANT */
130 #define foreach_l2input_error \
131 _(L2INPUT, "L2 input packets") \
132 _(DROP, "L2 input drops")
136 #define _(sym,str) L2INPUT_ERROR_##sym,
137 foreach_l2input_error
142 static char *l2input_error_strings[] = {
143 #define _(sym,string) string,
144 foreach_l2input_error
157 static_always_inline void
158 classify_and_dispatch (l2input_main_t * msm, vlib_buffer_t * b0, u32 * next0)
161 * Load L2 input feature struct
162 * Load bridge domain struct
163 * Parse ethernet header to determine unicast/mcast/broadcast
165 * classify packet as IP/UDP/TCP, control, other
166 * mask feature bitmap
167 * go to first node in bitmap
168 * Later: optimize VTM
171 * set tx sw-if-handle
175 u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
176 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
178 /* Get config for the input interface */
179 l2_input_config_t *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 u8 *l3h0 = (u8 *) h0 + vnet_buffer (b0)->l2.l2_len;
189 #define get_u16(addr) ( *((u16 *)(addr)) )
190 u16 ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2));
191 u8 protocol = ((ip6_header_t *) l3h0)->protocol;
193 /* Disable bridge forwarding (flooding will execute instead if not xconnect) */
194 feat_mask &= ~(L2INPUT_FEAT_FWD |
195 L2INPUT_FEAT_UU_FLOOD |
196 L2INPUT_FEAT_UU_FWD | L2INPUT_FEAT_GBP_FWD);
198 if (ethertype != ETHERNET_TYPE_ARP)
199 feat_mask &= ~(L2INPUT_FEAT_ARP_UFWD);
201 /* Disable ARP-term for non-ARP and non-ICMP6 packet */
202 if (ethertype != ETHERNET_TYPE_ARP &&
203 (ethertype != ETHERNET_TYPE_IP6 || protocol != IP_PROTOCOL_ICMP6))
204 feat_mask &= ~(L2INPUT_FEAT_ARP_TERM);
206 * For packet from BVI - set SHG of ARP request or ICMPv6 neighbor
207 * solicitation packet from BVI to 0 so it can also flood to VXLAN
208 * tunnels or other ports with the same SHG as that of the BVI.
210 else if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
213 if (ethertype == ETHERNET_TYPE_ARP)
215 ethernet_arp_header_t *arp0 = (ethernet_arp_header_t *) l3h0;
217 clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request))
218 vnet_buffer (b0)->l2.shg = 0;
220 else /* must be ICMPv6 */
222 ip6_header_t *iph0 = (ip6_header_t *) l3h0;
223 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh0;
224 ndh0 = ip6_next_header (iph0);
225 if (ndh0->icmp.type == ICMP6_neighbor_solicitation)
226 vnet_buffer (b0)->l2.shg = 0;
233 * For packet from BVI - set SHG of unicast packet from BVI to 0 so it
234 * is not dropped on output to VXLAN tunnels or other ports with the
235 * same SHG as that of the BVI.
237 if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
239 vnet_buffer (b0)->l2.shg = 0;
245 /* Do bridge-domain processing */
246 u16 bd_index0 = config->bd_index;
247 /* save BD ID for next feature graph nodes */
248 vnet_buffer (b0)->l2.bd_index = bd_index0;
250 /* Get config for the bridge domain interface */
251 l2_bridge_domain_t *bd_config =
252 vec_elt_at_index (msm->bd_configs, bd_index0);
254 /* Save bridge domain and interface seq_num */
256 l2fib_seq_num_t sn = {
257 .swif = *l2fib_swif_seq_num(sw_if_index0),
258 .bd = bd_config->seq_num,
261 vnet_buffer (b0)->l2.l2fib_sn = sn.as_u16;;
262 vnet_buffer (b0)->l2.bd_age = bd_config->mac_age;
265 * Process bridge domain feature enables.
266 * To perform learning/flooding/forwarding, the corresponding bit
267 * must be enabled in both the input interface config and in the
268 * bridge domain config. In the bd_bitmap, bits for features other
269 * than learning/flooding/forwarding should always be set.
271 feat_mask = feat_mask & bd_config->feature_bitmap;
273 else if (config->xconnect)
275 /* Set the output interface */
276 vnet_buffer (b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index;
279 feat_mask = L2INPUT_FEAT_DROP;
281 /* mask out features from bitmap using packet type and bd config */
282 u32 feature_bitmap = config->feature_bitmap & feat_mask;
284 /* save for next feature graph nodes */
285 vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap;
287 /* Determine the next node */
288 *next0 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
292 static_always_inline uword
293 l2input_node_inline (vlib_main_t * vm,
294 vlib_node_runtime_t * node, vlib_frame_t * frame,
297 u32 n_left_from, *from, *to_next;
298 l2input_next_t next_index;
299 l2input_main_t *msm = &l2input_main;
300 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
302 from = vlib_frame_vector_args (frame);
303 n_left_from = frame->n_vectors; /* number of packets to process */
304 next_index = node->cached_next_index;
305 vlib_get_buffers (vm, from, bufs, n_left_from);
307 while (n_left_from > 0)
311 /* get space to enqueue frame to graph node "next_index" */
312 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
314 while (n_left_from >= 8 && n_left_to_next >= 4)
316 u32 next0, next1, next2, next3;
317 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
319 /* Prefetch next iteration. */
322 /* Prefetch the buffer header and packet for the N+2 loop iteration */
323 vlib_prefetch_buffer_header (b[4], LOAD);
324 vlib_prefetch_buffer_header (b[5], LOAD);
325 vlib_prefetch_buffer_header (b[6], LOAD);
326 vlib_prefetch_buffer_header (b[7], LOAD);
328 CLIB_PREFETCH (b[4]->data, CLIB_CACHE_LINE_BYTES, STORE);
329 CLIB_PREFETCH (b[5]->data, CLIB_CACHE_LINE_BYTES, STORE);
330 CLIB_PREFETCH (b[6]->data, CLIB_CACHE_LINE_BYTES, STORE);
331 CLIB_PREFETCH (b[7]->data, CLIB_CACHE_LINE_BYTES, STORE);
334 * Don't bother prefetching the bridge-domain config (which
335 * depends on the input config above). Only a small number of
336 * bridge domains are expected. Plus the structure is small
337 * and several fit in a cache line.
341 /* speculatively enqueue b0 and b1 to the current next frame */
342 /* bi is "buffer index", b is pointer to the buffer */
346 /* RX interface handles */
347 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
348 sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
349 sw_if_index2 = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
350 sw_if_index3 = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
352 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
354 ethernet_header_t *h0 = vlib_buffer_get_current (b[0]);
356 vlib_add_trace (vm, node, b[0], sizeof (*t));
357 t->sw_if_index = sw_if_index0;
358 clib_memcpy_fast (t->dst_and_src, h0->dst_address,
359 sizeof (h0->dst_address) +
360 sizeof (h0->src_address));
362 if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
364 ethernet_header_t *h1 = vlib_buffer_get_current (b[1]);
366 vlib_add_trace (vm, node, b[1], sizeof (*t));
367 t->sw_if_index = sw_if_index1;
368 clib_memcpy_fast (t->dst_and_src, h1->dst_address,
369 sizeof (h1->dst_address) +
370 sizeof (h1->src_address));
372 if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
374 ethernet_header_t *h2 = vlib_buffer_get_current (b[2]);
376 vlib_add_trace (vm, node, b[2], sizeof (*t));
377 t->sw_if_index = sw_if_index2;
378 clib_memcpy_fast (t->dst_and_src, h2->dst_address,
379 sizeof (h2->dst_address) +
380 sizeof (h2->src_address));
382 if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
384 ethernet_header_t *h3 = vlib_buffer_get_current (b[3]);
386 vlib_add_trace (vm, node, b[3], sizeof (*t));
387 t->sw_if_index = sw_if_index3;
388 clib_memcpy_fast (t->dst_and_src, h3->dst_address,
389 sizeof (h3->dst_address) +
390 sizeof (h3->src_address));
394 classify_and_dispatch (msm, b[0], &next0);
395 classify_and_dispatch (msm, b[1], &next1);
396 //show the better performance when clib_memcpy_fast is put here.
397 clib_memcpy_fast (to_next, from, sizeof (from[0]) * 4);
399 classify_and_dispatch (msm, b[2], &next2);
400 classify_and_dispatch (msm, b[3], &next3);
405 /* verify speculative enqueues, maybe switch current next frame */
406 /* if next0==next1==next_index then nothing special needs to be done */
407 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
408 to_next, n_left_to_next,
409 from[0], from[1], from[2], from[3],
410 next0, next1, next2, next3);
414 while (n_left_from > 0 && n_left_to_next > 0)
419 /* speculatively enqueue b0 to the current next frame */
421 if (do_trace && PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
423 ethernet_header_t *h0 = vlib_buffer_get_current (b[0]);
425 vlib_add_trace (vm, node, b[0], sizeof (*t));
426 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
427 t->sw_if_index = sw_if_index0;
428 clib_memcpy_fast (t->dst_and_src, h0->dst_address,
429 sizeof (h0->dst_address) +
430 sizeof (h0->src_address));
433 classify_and_dispatch (msm, b[0], &next0);
435 to_next[0] = from[0];
440 /* verify speculative enqueue, maybe switch current next frame */
441 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
442 to_next, n_left_to_next,
447 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
450 vlib_node_increment_counter (vm, l2input_node.index,
451 L2INPUT_ERROR_L2INPUT, frame->n_vectors);
453 return frame->n_vectors;
456 VLIB_NODE_FN (l2input_node) (vlib_main_t * vm,
457 vlib_node_runtime_t * node, vlib_frame_t * frame)
459 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
460 return l2input_node_inline (vm, node, frame, 1 /* do_trace */ );
461 return l2input_node_inline (vm, node, frame, 0 /* do_trace */ );
465 VLIB_REGISTER_NODE (l2input_node) = {
467 .vector_size = sizeof (u32),
468 .format_trace = format_l2input_trace,
469 .format_buffer = format_ethernet_header_with_length,
470 .type = VLIB_NODE_TYPE_INTERNAL,
472 .n_errors = ARRAY_LEN(l2input_error_strings),
473 .error_strings = l2input_error_strings,
475 .n_next_nodes = L2INPUT_N_NEXT,
477 /* edit / add dispositions here */
479 [L2INPUT_NEXT_LEARN] = "l2-learn",
480 [L2INPUT_NEXT_FWD] = "l2-fwd",
481 [L2INPUT_NEXT_DROP] = "error-drop",
486 #ifndef CLIB_MARCH_VARIANT
488 l2input_init (vlib_main_t * vm)
490 l2input_main_t *mp = &l2input_main;
493 mp->vnet_main = vnet_get_main ();
495 /* Get packets RX'd from L2 interfaces */
496 ethernet_register_l2_input (vm, l2input_node.index);
498 /* Create the config vector */
499 vec_validate (mp->configs, 100);
500 /* create 100 sw interface entries and zero them */
502 /* Initialize the feature next-node indexes */
503 feat_bitmap_init_next_nodes (vm,
506 l2input_get_feat_names (),
507 mp->feat_next_node_index);
512 VLIB_INIT_FUNCTION (l2input_init);
515 /** Get a pointer to the config for the given interface. */
517 l2input_intf_config (u32 sw_if_index)
519 l2input_main_t *mp = &l2input_main;
521 vec_validate (mp->configs, sw_if_index);
522 return vec_elt_at_index (mp->configs, sw_if_index);
525 /** Enable (or disable) the feature in the bitmap for the given interface. */
527 l2input_intf_bitmap_enable (u32 sw_if_index,
528 l2input_feat_masks_t feature_bitmap, u32 enable)
530 l2_input_config_t *config = l2input_intf_config (sw_if_index);
533 config->feature_bitmap |= feature_bitmap;
535 config->feature_bitmap &= ~feature_bitmap;
537 return config->feature_bitmap;
541 l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value)
543 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);;
544 bd_validate (bd_config);
545 bd_config->feature_bitmap =
546 (bd_config->feature_bitmap & ~feat_mask) | feat_value;
547 return bd_config->feature_bitmap;
551 l2input_interface_mac_change (u32 sw_if_index,
552 const u8 * old_address, const u8 * new_address)
554 /* check if the sw_if_index passed is a BVI in a BD */
555 l2_input_config_t *intf_config;
557 intf_config = l2input_intf_config (sw_if_index);
559 if (intf_config->bridge && intf_config->bvi)
561 /* delete and re-add l2fib entry for the bvi interface */
562 l2fib_del_entry (old_address, intf_config->bd_index, sw_if_index);
563 l2fib_add_entry (new_address,
564 intf_config->bd_index,
566 L2FIB_ENTRY_RESULT_FLAG_BVI |
567 L2FIB_ENTRY_RESULT_FLAG_STATIC);
572 * Set the subinterface to run in l2 or l3 mode.
573 * For L3 mode, just the sw_if_index is specified.
574 * For bridged mode, the bd id and bvi flag are also specified.
575 * For xconnect mode, the peer sw_if_index is also specified.
576 * Return 0 if ok, or non-0 if there was an error.
580 set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, /* */
581 u32 mode, /* One of L2 modes or back to L3 mode */
582 u32 sw_if_index, /* sw interface index */
583 u32 bd_index, /* for bridged interface */
584 l2_bd_port_type_t port_type, /* port_type */
585 u32 shg, /* the bridged interface split horizon group */
586 u32 xc_sw_if_index) /* peer interface for xconnect */
588 l2input_main_t *mp = &l2input_main;
589 l2output_main_t *l2om = &l2output_main;
590 vnet_main_t *vnm = vnet_get_main ();
591 vnet_hw_interface_t *hi;
592 l2_output_config_t *out_config;
593 l2_input_config_t *config;
594 l2_bridge_domain_t *bd_config;
595 i32 l2_if_adjust = 0;
596 vnet_device_class_t *dev_class;
598 hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index);
599 config = l2input_intf_config (sw_if_index);
601 if (l2fib_main.mac_table_initialized == 0)
606 /* Interface is already in bridge mode. Undo the existing config. */
607 bd_config = vec_elt_at_index (mp->bd_configs, config->bd_index);
609 /* remove interface from flood vector */
610 bd_remove_member (bd_config, sw_if_index);
612 /* undo any BVI-related config */
613 if (bd_config->bvi_sw_if_index == sw_if_index)
615 vnet_sw_interface_t *si;
617 bd_config->bvi_sw_if_index = ~0;
620 /* delete the l2fib entry for the bvi interface */
621 l2fib_del_entry (hi->hw_address, config->bd_index, sw_if_index);
623 /* since this is a no longer BVI interface do not to flood to it */
624 si = vnet_get_sw_interface (vnm, sw_if_index);
625 si->flood_class = VNET_FLOOD_CLASS_NO_FLOOD;
627 if (bd_config->uu_fwd_sw_if_index == sw_if_index)
629 bd_config->uu_fwd_sw_if_index = ~0;
630 bd_config->feature_bitmap &= ~L2INPUT_FEAT_UU_FWD;
633 /* Clear MACs learned on the interface */
634 if ((config->feature_bitmap & L2INPUT_FEAT_LEARN) ||
635 (bd_config->feature_bitmap & L2INPUT_FEAT_LEARN))
636 l2fib_flush_int_mac (vm, sw_if_index);
640 else if (config->xconnect)
645 /* Make sure vector is big enough */
646 vec_validate_init_empty (l2om->output_node_index_vec, sw_if_index,
649 /* Initialize the l2-input configuration for the interface */
652 /* Set L2 config to BD index 0 so that if any packet accidentally
653 * came in on L2 path, it will be dropped in BD 0 */
654 config->xconnect = 0;
657 config->bd_index = 0;
658 config->feature_bitmap = L2INPUT_FEAT_DROP;
660 /* Clear L2 output config */
661 out_config = l2output_intf_config (sw_if_index);
662 clib_memset (out_config, 0, sizeof (l2_output_config_t));
664 /* Make sure any L2-output packet to this interface now in L3 mode is
665 * dropped. This may happen if L2 FIB MAC entry is stale */
666 l2om->output_node_index_vec[sw_if_index] = L2OUTPUT_NEXT_BAD_INTF;
670 /* Add or update l2-output node next-arc and output_node_index_vec table
671 * for the interface */
672 l2output_create_output_node_mapping (vm, vnet_main, sw_if_index);
674 if (mode == MODE_L2_BRIDGE)
679 * Remove a check that the interface must be an Ethernet.
680 * Specifically so we can bridge to L3 tunnel interfaces.
682 * if (hi->hw_class_index != ethernet_hw_interface_class.index)
686 return MODE_ERROR_ETH; /* non-ethernet */
688 config->xconnect = 0;
690 config->bd_index = bd_index;
691 *l2fib_valid_swif_seq_num (sw_if_index) += 1;
694 * Enable forwarding, flooding, learning and ARP termination by default
695 * (note that ARP term is disabled on BD feature bitmap by default)
697 config->feature_bitmap |= (L2INPUT_FEAT_FWD |
698 L2INPUT_FEAT_UU_FLOOD |
699 L2INPUT_FEAT_UU_FWD |
702 L2INPUT_FEAT_ARP_UFWD |
703 L2INPUT_FEAT_ARP_TERM);
705 /* Make sure last-chance drop is configured */
706 config->feature_bitmap |= L2INPUT_FEAT_DROP;
708 /* Make sure xconnect is disabled */
709 config->feature_bitmap &= ~L2INPUT_FEAT_XCONNECT;
711 /* Set up bridge domain */
712 bd_config = l2input_bd_config (bd_index);
713 bd_validate (bd_config);
715 /* TODO: think: add l2fib entry even for non-bvi interface? */
717 /* Do BVI interface initializations */
718 if (L2_BD_PORT_TYPE_BVI == port_type)
720 vnet_sw_interface_t *si;
722 /* ensure BD has no bvi interface (or replace that one with this??) */
723 if (bd_config->bvi_sw_if_index != ~0)
725 return MODE_ERROR_BVI_DEF; /* bd already has a bvi interface */
727 bd_config->bvi_sw_if_index = sw_if_index;
730 /* create the l2fib entry for the bvi interface */
731 l2fib_add_entry (hi->hw_address, bd_index, sw_if_index,
732 L2FIB_ENTRY_RESULT_FLAG_BVI |
733 L2FIB_ENTRY_RESULT_FLAG_STATIC);
735 /* Disable learning by default. no use since l2fib entry is static. */
736 config->feature_bitmap &= ~L2INPUT_FEAT_LEARN;
738 /* since this is a BVI interface we want to flood to it */
739 si = vnet_get_sw_interface (vnm, sw_if_index);
740 si->flood_class = VNET_FLOOD_CLASS_BVI;
741 member_flags = L2_FLOOD_MEMBER_BVI;
743 else if (L2_BD_PORT_TYPE_UU_FWD == port_type)
745 bd_config->uu_fwd_sw_if_index = sw_if_index;
746 bd_config->feature_bitmap |= L2INPUT_FEAT_UU_FWD;
750 member_flags = L2_FLOOD_MEMBER_NORMAL;
753 if (L2_BD_PORT_TYPE_NORMAL == port_type ||
754 L2_BD_PORT_TYPE_BVI == port_type)
756 /* Add interface to bridge-domain flood vector */
757 l2_flood_member_t member = {
758 .sw_if_index = sw_if_index,
759 .flags = member_flags,
762 bd_add_member (bd_config, &member);
765 else if (mode == MODE_L2_XC)
767 config->xconnect = 1;
769 config->output_sw_if_index = xc_sw_if_index;
771 /* Make sure last-chance drop is configured */
772 config->feature_bitmap |= L2INPUT_FEAT_DROP;
774 /* Make sure bridging features are disabled */
775 config->feature_bitmap &=
776 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
778 config->feature_bitmap |= L2INPUT_FEAT_XCONNECT;
779 shg = 0; /* not used in xconnect */
781 else if (mode == MODE_L2_CLASSIFY)
783 config->xconnect = 1;
785 config->output_sw_if_index = xc_sw_if_index;
787 /* Make sure last-chance drop is configured */
788 config->feature_bitmap |=
789 L2INPUT_FEAT_DROP | L2INPUT_FEAT_INPUT_CLASSIFY;
791 /* Make sure bridging features are disabled */
792 config->feature_bitmap &=
793 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
794 shg = 0; /* not used in xconnect */
797 /* set up split-horizon group and set output feature bit */
799 out_config = l2output_intf_config (sw_if_index);
800 out_config->shg = shg;
801 out_config->feature_bitmap |= L2OUTPUT_FEAT_OUTPUT;
804 * Test: remove this when non-IP features can be configured.
805 * Enable a non-IP feature to test IP feature masking
806 * config->feature_bitmap |= L2INPUT_FEAT_CTRL_PKT;
812 /* Adjust count of L2 interfaces */
813 hi->l2_if_count += l2_if_adjust;
815 if (hi->hw_class_index == ethernet_hw_interface_class.index)
817 if ((hi->l2_if_count == 1) && (l2_if_adjust == 1))
819 /* Just added first L2 interface on this port
820 * Set promiscuous mode on the l2 interface */
821 ethernet_set_flags (vnet_main, hi->hw_if_index,
822 ETHERNET_INTERFACE_FLAG_ACCEPT_ALL);
824 else if ((hi->l2_if_count == 0) && (l2_if_adjust == -1))
826 /* Just removed only L2 subinterface on this port
827 * Disable promiscuous mode on the l2 interface */
828 ethernet_set_flags (vnet_main, hi->hw_if_index,
829 /*ETHERNET_INTERFACE_FLAG_DEFAULT_L3 */ 0);
834 /* Set up the L2/L3 flag in the interface parsing tables */
835 ethernet_sw_interface_set_l2_mode (vnm, sw_if_index, (mode != MODE_L3));
837 dev_class = vnet_get_device_class (vnet_main, hi->dev_class_index);
838 if (dev_class->set_l2_mode_function)
840 dev_class->set_l2_mode_function (vnet_main, hi, l2_if_adjust);
845 #endif /* CLIB_MARCH_VARIANT */
848 * Set subinterface in bridging mode with a bridge-domain ID.
850 * set interface l2 bridge <interface> <bd> [bvi] [split-horizon-group]
852 static clib_error_t *
853 int_l2_bridge (vlib_main_t * vm,
854 unformat_input_t * input, vlib_cli_command_t * cmd)
856 vnet_main_t *vnm = vnet_get_main ();
857 l2_bd_port_type_t port_type;
858 clib_error_t *error = 0;
864 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
866 error = clib_error_return (0, "unknown interface `%U'",
867 format_unformat_error, input);
871 if (!unformat (input, "%d", &bd_id))
873 error = clib_error_return (0, "expected bridge domain ID `%U'",
874 format_unformat_error, input);
878 if (bd_id > L2_BD_ID_MAX)
880 error = clib_error_return (0, "bridge domain ID exceed 16M limit",
881 format_unformat_error, input);
884 bd_index = bd_find_or_add_bd_index (&bd_main, bd_id);
887 port_type = L2_BD_PORT_TYPE_NORMAL;
888 if (unformat (input, "bvi"))
889 port_type = L2_BD_PORT_TYPE_BVI;
890 if (unformat (input, "uu-fwd"))
891 port_type = L2_BD_PORT_TYPE_UU_FWD;
893 /* optional split horizon group */
895 (void) unformat (input, "%d", &shg);
897 /* set the interface mode */
899 set_int_l2_mode (vm, vnm, MODE_L2_BRIDGE, sw_if_index, bd_index,
902 if (rc == MODE_ERROR_ETH)
904 error = clib_error_return (0, "bridged interface must be ethernet",
905 format_unformat_error, input);
907 else if (rc == MODE_ERROR_BVI_DEF)
910 clib_error_return (0, "bridge-domain already has a bvi interface",
911 format_unformat_error, input);
915 error = clib_error_return (0, "invalid configuration for interface",
916 format_unformat_error, input);
926 * Use this command put an interface into Layer 2 bridge domain. If a
927 * bridge-domain with the provided bridge-domain-id does not exist, it
928 * will be created. Interfaces in a bridge-domain forward packets to
929 * other interfaces in the same bridge-domain based on destination mac
930 * address. To remove an interface from a the Layer 2 bridge domain,
931 * put the interface in a different mode, for example Layer 3 mode.
933 * Optionally, an interface can be added to a Layer 2 bridge-domain as
934 * a Bridged Virtual Interface (bvi). Only one interface in a Layer 2
935 * bridge-domain can be a bvi.
937 * Optionally, a split-horizon group can also be specified. This defaults
938 * to 0 if not specified.
941 * Example of how to configure a Layer 2 bridge-domain with three
942 * interfaces (where 200 is the bridge-domain-id):
943 * @cliexcmd{set interface l2 bridge GigabitEthernet0/8/0.200 200}
944 * This interface is added a BVI interface:
945 * @cliexcmd{set interface l2 bridge GigabitEthernet0/9/0.200 200 bvi}
946 * This interface also has a split-horizon group of 1 specified:
947 * @cliexcmd{set interface l2 bridge GigabitEthernet0/a/0.200 200 1}
948 * Example of how to remove an interface from a Layer2 bridge-domain:
949 * @cliexcmd{set interface l3 GigabitEthernet0/a/0.200}
952 VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = {
953 .path = "set interface l2 bridge",
954 .short_help = "set interface l2 bridge <interface> <bridge-domain-id> [bvi|uu-fwd] [shg]",
955 .function = int_l2_bridge,
960 * Set subinterface in xconnect mode with another interface.
962 * set interface l2 xconnect <interface> <peer interface>
964 static clib_error_t *
965 int_l2_xc (vlib_main_t * vm,
966 unformat_input_t * input, vlib_cli_command_t * cmd)
968 vnet_main_t *vnm = vnet_get_main ();
969 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);
981 (input, unformat_vnet_sw_interface, vnm, &xc_sw_if_index))
983 error = clib_error_return (0, "unknown peer interface `%U'",
984 format_unformat_error, input);
988 /* set the interface mode */
990 (vm, vnm, MODE_L2_XC, sw_if_index, 0, L2_BD_PORT_TYPE_NORMAL,
993 error = clib_error_return (0, "invalid configuration for interface",
994 format_unformat_error, input);
1003 * Use this command put an interface into Layer 2 cross-connect mode.
1004 * Both interfaces must be in this mode for bi-directional traffic. All
1005 * packets received on one interface will be transmitted to the other.
1006 * To remove the Layer 2 cross-connect, put the interface in a different
1007 * mode, for example Layer 3 mode.
1010 * Example of how to configure a Layer2 cross-connect between two interfaces:
1011 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300}
1012 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300}
1013 * Example of how to remove a Layer2 cross-connect:
1014 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.300}
1015 * @cliexcmd{set interface l3 GigabitEthernet0/9/0.300}
1018 VLIB_CLI_COMMAND (int_l2_xc_cli, static) = {
1019 .path = "set interface l2 xconnect",
1020 .short_help = "set interface l2 xconnect <interface> <peer interface>",
1021 .function = int_l2_xc,
1026 * Set subinterface in L3 mode.
1027 * The CLI format is:
1028 * set interface l3 <interface>
1030 static clib_error_t *
1031 int_l3 (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
1033 vnet_main_t *vnm = vnet_get_main ();
1034 clib_error_t *error = 0;
1037 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
1039 error = clib_error_return (0, "unknown interface `%U'",
1040 format_unformat_error, input);
1044 /* set the interface mode */
1045 if (set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0,
1046 L2_BD_PORT_TYPE_NORMAL, 0, 0))
1048 error = clib_error_return (0, "invalid configuration for interface",
1049 format_unformat_error, input);
1058 * Modify the packet processing mode of the interface to Layer 3, which
1059 * implies packets will be routed. This is the default mode of an interface.
1060 * Use this command to remove an interface from a Layer 2 cross-connect or a
1064 * Example of how to set the mode of an interface to Layer 3:
1065 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.200}
1068 VLIB_CLI_COMMAND (int_l3_cli, static) = {
1069 .path = "set interface l3",
1070 .short_help = "set interface l3 <interface>",
1076 * Show interface mode.
1077 * The CLI format is:
1078 * show mode [<if-name1> <if-name2> ...]
1080 static clib_error_t *
1081 show_int_mode (vlib_main_t * vm,
1082 unformat_input_t * input, vlib_cli_command_t * cmd)
1084 vnet_main_t *vnm = vnet_get_main ();
1085 clib_error_t *error = 0;
1088 vnet_interface_main_t *im = &vnm->interface_main;
1090 vnet_sw_interface_t *si, *sis = 0;
1091 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1095 /* See if user wants to show specific interface */
1097 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1099 si = pool_elt_at_index (im->sw_interfaces, sw_if_index);
1100 vec_add1 (sis, si[0]);
1104 error = clib_error_return (0, "unknown input `%U'",
1105 format_unformat_error, input);
1110 if (vec_len (sis) == 0) /* Get all interfaces */
1112 /* Gather interfaces. */
1113 sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces));
1116 pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); }));
1120 vec_foreach (si, sis)
1122 l2_input_config_t *config = l2input_intf_config (si->sw_if_index);
1127 bd_id = l2input_main.bd_configs[config->bd_index].bd_id;
1129 args = format (0, "bd_id %d%s%d", bd_id,
1130 config->bvi ? " bvi shg " : " shg ", config->shg);
1132 else if (config->xconnect)
1134 mode = "l2 xconnect";
1135 args = format (0, "%U",
1136 format_vnet_sw_if_index_name,
1137 vnm, config->output_sw_if_index);
1142 args = format (0, " ");
1144 vlib_cli_output (vm, "%s %U %v\n",
1146 format_vnet_sw_if_index_name,
1147 vnm, si->sw_if_index, args);
1158 * Show the packet processing mode (Layer2 cross-connect, Layer 2 bridge,
1159 * Layer 3 routed) of all interfaces and sub-interfaces, or limit the
1160 * output to just the provided list of interfaces and sub-interfaces.
1161 * The output shows the mode, the interface, and if the interface is
1162 * a member of a bridge, the bridge-domain-id and the split horizon group (shg).
1165 * Example of displaying the mode of all interfaces:
1166 * @cliexstart{show mode}
1168 * l3 GigabitEthernet0/8/0
1169 * l3 GigabitEthernet0/9/0
1170 * l3 GigabitEthernet0/a/0
1171 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1172 * l2 bridge GigabitEthernet0/9/0.200 bd_id 200 shg 0
1173 * l2 bridge GigabitEthernet0/a/0.200 bd_id 200 shg 0
1174 * l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300
1175 * l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300
1177 * Example of displaying the mode of a selected list of interfaces:
1178 * @cliexstart{show mode GigabitEthernet0/8/0 GigabitEthernet0/8/0.200}
1179 * l3 GigabitEthernet0/8/0
1180 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1184 VLIB_CLI_COMMAND (show_l2_mode, static) = {
1185 .path = "show mode",
1186 .short_help = "show mode [<if-name1> <if-name2> ...]",
1187 .function = show_int_mode,
1191 #define foreach_l2_init_function \
1192 _(feat_bitmap_drop_init) \
1194 _(l2_input_classify_init) \
1197 _(l2_in_out_acl_init) \
1201 _(l2_efp_filter_init) \
1208 #ifndef CLIB_MARCH_VARIANT
1210 l2_init (vlib_main_t * vm)
1212 clib_error_t *error;
1215 if ((error = vlib_call_init_function (vm, a))) return error; } \
1217 foreach_l2_init_function;
1222 VLIB_INIT_FUNCTION (l2_init);
1223 #endif /* CLIB_MARCH_VARIANT */
1226 * fd.io coding-style-patch-verification: ON
1229 * eval: (c-set-style "gnu")