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 /* Feature graph node names */
53 static char *l2input_feat_names[] = {
54 #define _(sym,name) name,
60 l2input_get_feat_names (void)
62 return l2input_feat_names;
66 format_l2_input_features (u8 * s, va_list * args)
68 static char *display_names[] = {
69 #define _(sym,name) #sym,
73 u32 feature_bitmap = va_arg (*args, u32);
74 u32 verbose = va_arg (*args, u32);
76 if (feature_bitmap == 0)
78 s = format (s, " none configured");
82 feature_bitmap &= ~L2INPUT_FEAT_DROP; /* Not a feature */
84 for (i = L2INPUT_N_FEAT; i >= 0; i--)
86 if (feature_bitmap & (1 << i))
89 s = format (s, "%17s (%s)\n",
90 display_names[i], l2input_feat_names[i]);
92 s = format (s, "%s ", l2input_feat_names[i]);
100 /* per-pkt trace data */
107 /* packet trace format function */
109 format_l2input_trace (u8 * s, va_list * args)
111 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
112 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
113 l2input_trace_t *t = va_arg (*args, l2input_trace_t *);
115 s = format (s, "l2-input: sw_if_index %d dst %U src %U",
117 format_ethernet_address, t->dst,
118 format_ethernet_address, t->src);
122 l2input_main_t l2input_main;
124 #define foreach_l2input_error \
125 _(L2INPUT, "L2 input packets") \
126 _(DROP, "L2 input drops")
130 #define _(sym,str) L2INPUT_ERROR_##sym,
131 foreach_l2input_error
136 static char *l2input_error_strings[] = {
137 #define _(sym,string) string,
138 foreach_l2input_error
151 static_always_inline void
152 classify_and_dispatch (l2input_main_t * msm, vlib_buffer_t * b0, u32 * next0)
155 * Load L2 input feature struct
156 * Load bridge domain struct
157 * Parse ethernet header to determine unicast/mcast/broadcast
159 * classify packet as IP/UDP/TCP, control, other
160 * mask feature bitmap
161 * go to first node in bitmap
162 * Later: optimize VTM
165 * set tx sw-if-handle
169 u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
170 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
172 /* Get config for the input interface */
173 l2_input_config_t *config = vec_elt_at_index (msm->configs, sw_if_index0);
175 /* Save split horizon group */
176 vnet_buffer (b0)->l2.shg = config->shg;
178 /* determine layer2 kind for stat and mask */
179 if (PREDICT_FALSE (ethernet_address_cast (h0->dst_address)))
181 u8 *l3h0 = (u8 *) h0 + vnet_buffer (b0)->l2.l2_len;
183 #define get_u16(addr) ( *((u16 *)(addr)) )
184 u16 ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2));
185 u8 protocol = ((ip6_header_t *) l3h0)->protocol;
187 /* Disable bridge forwarding (flooding will execute instead if not xconnect) */
188 feat_mask &= ~(L2INPUT_FEAT_FWD |
189 L2INPUT_FEAT_UU_FLOOD |
190 L2INPUT_FEAT_UU_FWD | L2INPUT_FEAT_GBP_FWD);
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);
198 * For packet from BVI - set SHG of ARP request or ICMPv6 neighbor
199 * solicitation packet from BVI to 0 so it can also flood to VXLAN
200 * tunnels or other ports with the same SHG as that of the BVI.
202 else if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
205 if (ethertype == ETHERNET_TYPE_ARP)
207 ethernet_arp_header_t *arp0 = (ethernet_arp_header_t *) l3h0;
209 clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request))
210 vnet_buffer (b0)->l2.shg = 0;
212 else /* must be ICMPv6 */
214 ip6_header_t *iph0 = (ip6_header_t *) l3h0;
215 icmp6_neighbor_solicitation_or_advertisement_header_t *ndh0;
216 ndh0 = ip6_next_header (iph0);
217 if (ndh0->icmp.type == ICMP6_neighbor_solicitation)
218 vnet_buffer (b0)->l2.shg = 0;
225 * For packet from BVI - set SHG of unicast packet from BVI to 0 so it
226 * is not dropped on output to VXLAN tunnels or other ports with the
227 * same SHG as that of the BVI.
229 if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] ==
231 vnet_buffer (b0)->l2.shg = 0;
237 /* Do bridge-domain processing */
238 u16 bd_index0 = config->bd_index;
239 /* save BD ID for next feature graph nodes */
240 vnet_buffer (b0)->l2.bd_index = bd_index0;
242 /* Get config for the bridge domain interface */
243 l2_bridge_domain_t *bd_config =
244 vec_elt_at_index (msm->bd_configs, bd_index0);
246 /* Save bridge domain and interface seq_num */
248 l2fib_seq_num_t sn = {
249 .swif = *l2fib_swif_seq_num(sw_if_index0),
250 .bd = bd_config->seq_num,
253 vnet_buffer (b0)->l2.l2fib_sn = sn.as_u16;;
254 vnet_buffer (b0)->l2.bd_age = bd_config->mac_age;
257 * Process bridge domain feature enables.
258 * To perform learning/flooding/forwarding, the corresponding bit
259 * must be enabled in both the input interface config and in the
260 * bridge domain config. In the bd_bitmap, bits for features other
261 * than learning/flooding/forwarding should always be set.
263 feat_mask = feat_mask & bd_config->feature_bitmap;
265 else if (config->xconnect)
267 /* Set the output interface */
268 vnet_buffer (b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index;
271 feat_mask = L2INPUT_FEAT_DROP;
273 /* mask out features from bitmap using packet type and bd config */
274 u32 feature_bitmap = config->feature_bitmap & feat_mask;
276 /* save for next feature graph nodes */
277 vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap;
279 /* Determine the next node */
280 *next0 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
284 static_always_inline uword
285 l2input_node_inline (vlib_main_t * vm,
286 vlib_node_runtime_t * node, vlib_frame_t * frame,
289 u32 n_left_from, *from, *to_next;
290 l2input_next_t next_index;
291 l2input_main_t *msm = &l2input_main;
293 from = vlib_frame_vector_args (frame);
294 n_left_from = frame->n_vectors; /* number of packets to process */
295 next_index = node->cached_next_index;
297 while (n_left_from > 0)
301 /* get space to enqueue frame to graph node "next_index" */
302 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
304 while (n_left_from >= 8 && n_left_to_next >= 4)
306 u32 bi0, bi1, bi2, bi3;
307 vlib_buffer_t *b0, *b1, *b2, *b3;
308 u32 next0, next1, next2, next3;
309 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
311 /* Prefetch next iteration. */
313 vlib_buffer_t *p4, *p5, *p6, *p7;
315 p4 = vlib_get_buffer (vm, from[4]);
316 p5 = vlib_get_buffer (vm, from[5]);
317 p6 = vlib_get_buffer (vm, from[6]);
318 p7 = vlib_get_buffer (vm, from[7]);
320 /* Prefetch the buffer header and packet for the N+2 loop iteration */
321 vlib_prefetch_buffer_header (p4, LOAD);
322 vlib_prefetch_buffer_header (p5, LOAD);
323 vlib_prefetch_buffer_header (p6, LOAD);
324 vlib_prefetch_buffer_header (p7, LOAD);
326 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
327 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
328 CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
329 CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
332 * Don't bother prefetching the bridge-domain config (which
333 * depends on the input config above). Only a small number of
334 * bridge domains are expected. Plus the structure is small
335 * and several fit in a cache line.
339 /* speculatively enqueue b0 and b1 to the current next frame */
340 /* bi is "buffer index", b is pointer to the buffer */
341 to_next[0] = bi0 = from[0];
342 to_next[1] = bi1 = from[1];
343 to_next[2] = bi2 = from[2];
344 to_next[3] = bi3 = from[3];
350 b0 = vlib_get_buffer (vm, bi0);
351 b1 = vlib_get_buffer (vm, bi1);
352 b2 = vlib_get_buffer (vm, bi2);
353 b3 = vlib_get_buffer (vm, bi3);
357 /* RX interface handles */
358 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
359 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
360 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX];
361 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX];
363 if (b0->flags & VLIB_BUFFER_IS_TRACED)
365 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
367 vlib_add_trace (vm, node, b0, sizeof (*t));
368 t->sw_if_index = sw_if_index0;
369 clib_memcpy_fast (t->src, h0->src_address, 6);
370 clib_memcpy_fast (t->dst, h0->dst_address, 6);
372 if (b1->flags & VLIB_BUFFER_IS_TRACED)
374 ethernet_header_t *h1 = vlib_buffer_get_current (b1);
376 vlib_add_trace (vm, node, b1, sizeof (*t));
377 t->sw_if_index = sw_if_index1;
378 clib_memcpy_fast (t->src, h1->src_address, 6);
379 clib_memcpy_fast (t->dst, h1->dst_address, 6);
381 if (b2->flags & VLIB_BUFFER_IS_TRACED)
383 ethernet_header_t *h2 = vlib_buffer_get_current (b2);
385 vlib_add_trace (vm, node, b2, sizeof (*t));
386 t->sw_if_index = sw_if_index2;
387 clib_memcpy_fast (t->src, h2->src_address, 6);
388 clib_memcpy_fast (t->dst, h2->dst_address, 6);
390 if (b3->flags & VLIB_BUFFER_IS_TRACED)
392 ethernet_header_t *h3 = vlib_buffer_get_current (b3);
394 vlib_add_trace (vm, node, b3, sizeof (*t));
395 t->sw_if_index = sw_if_index3;
396 clib_memcpy_fast (t->src, h3->src_address, 6);
397 clib_memcpy_fast (t->dst, h3->dst_address, 6);
401 classify_and_dispatch (msm, b0, &next0);
402 classify_and_dispatch (msm, b1, &next1);
403 classify_and_dispatch (msm, b2, &next2);
404 classify_and_dispatch (msm, b3, &next3);
406 /* verify speculative enqueues, maybe switch current next frame */
407 /* if next0==next1==next_index then nothing special needs to be done */
408 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
409 to_next, n_left_to_next,
411 next0, next1, next2, next3);
414 while (n_left_from > 0 && n_left_to_next > 0)
421 /* speculatively enqueue b0 to the current next frame */
429 b0 = vlib_get_buffer (vm, bi0);
431 if (do_trace && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
433 ethernet_header_t *h0 = vlib_buffer_get_current (b0);
434 l2input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
435 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
436 t->sw_if_index = sw_if_index0;
437 clib_memcpy_fast (t->src, h0->src_address, 6);
438 clib_memcpy_fast (t->dst, h0->dst_address, 6);
441 classify_and_dispatch (msm, b0, &next0);
443 /* verify speculative enqueue, maybe switch current next frame */
444 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
445 to_next, n_left_to_next,
449 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
452 vlib_node_increment_counter (vm, l2input_node.index,
453 L2INPUT_ERROR_L2INPUT, frame->n_vectors);
455 return frame->n_vectors;
459 l2input_node_fn (vlib_main_t * vm,
460 vlib_node_runtime_t * node, vlib_frame_t * frame)
462 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
463 return l2input_node_inline (vm, node, frame, 1 /* do_trace */ );
464 return l2input_node_inline (vm, node, frame, 0 /* do_trace */ );
468 VLIB_REGISTER_NODE (l2input_node) = {
469 .function = l2input_node_fn,
471 .vector_size = sizeof (u32),
472 .format_trace = format_l2input_trace,
473 .format_buffer = format_ethernet_header_with_length,
474 .type = VLIB_NODE_TYPE_INTERNAL,
476 .n_errors = ARRAY_LEN(l2input_error_strings),
477 .error_strings = l2input_error_strings,
479 .n_next_nodes = L2INPUT_N_NEXT,
481 /* edit / add dispositions here */
483 [L2INPUT_NEXT_LEARN] = "l2-learn",
484 [L2INPUT_NEXT_FWD] = "l2-fwd",
485 [L2INPUT_NEXT_DROP] = "error-drop",
490 VLIB_NODE_FUNCTION_MULTIARCH (l2input_node, l2input_node_fn)
491 clib_error_t *l2input_init (vlib_main_t * vm)
493 l2input_main_t *mp = &l2input_main;
496 mp->vnet_main = vnet_get_main ();
498 /* Get packets RX'd from L2 interfaces */
499 ethernet_register_l2_input (vm, l2input_node.index);
501 /* Create the config vector */
502 vec_validate (mp->configs, 100);
503 /* create 100 sw interface entries and zero them */
505 /* Initialize the feature next-node indexes */
506 feat_bitmap_init_next_nodes (vm,
509 l2input_get_feat_names (),
510 mp->feat_next_node_index);
515 VLIB_INIT_FUNCTION (l2input_init);
518 /** Get a pointer to the config for the given interface. */
520 l2input_intf_config (u32 sw_if_index)
522 l2input_main_t *mp = &l2input_main;
524 vec_validate (mp->configs, sw_if_index);
525 return vec_elt_at_index (mp->configs, sw_if_index);
528 /** Enable (or disable) the feature in the bitmap for the given interface. */
530 l2input_intf_bitmap_enable (u32 sw_if_index,
531 l2input_feat_masks_t feature_bitmap, u32 enable)
533 l2_input_config_t *config = l2input_intf_config (sw_if_index);
536 config->feature_bitmap |= feature_bitmap;
538 config->feature_bitmap &= ~feature_bitmap;
540 return config->feature_bitmap;
544 l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value)
546 l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);;
547 bd_validate (bd_config);
548 bd_config->feature_bitmap =
549 (bd_config->feature_bitmap & ~feat_mask) | feat_value;
550 return bd_config->feature_bitmap;
554 l2input_interface_mac_change (u32 sw_if_index,
555 const u8 * old_address, const u8 * new_address)
557 /* check if the sw_if_index passed is a BVI in a BD */
558 l2_input_config_t *intf_config;
560 intf_config = l2input_intf_config (sw_if_index);
562 if (intf_config->bridge && intf_config->bvi)
564 /* delete and re-add l2fib entry for the bvi interface */
565 l2fib_del_entry (old_address, intf_config->bd_index, sw_if_index);
566 l2fib_add_entry (new_address,
567 intf_config->bd_index,
569 L2FIB_ENTRY_RESULT_FLAG_BVI |
570 L2FIB_ENTRY_RESULT_FLAG_STATIC);
575 * Set the subinterface to run in l2 or l3 mode.
576 * For L3 mode, just the sw_if_index is specified.
577 * For bridged mode, the bd id and bvi flag are also specified.
578 * For xconnect mode, the peer sw_if_index is also specified.
579 * Return 0 if ok, or non-0 if there was an error.
583 set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, /* */
584 u32 mode, /* One of L2 modes or back to L3 mode */
585 u32 sw_if_index, /* sw interface index */
586 u32 bd_index, /* for bridged interface */
587 l2_bd_port_type_t port_type, /* port_type */
588 u32 shg, /* the bridged interface split horizon group */
589 u32 xc_sw_if_index) /* peer interface for xconnect */
591 l2input_main_t *mp = &l2input_main;
592 l2output_main_t *l2om = &l2output_main;
593 vnet_main_t *vnm = vnet_get_main ();
594 vnet_hw_interface_t *hi;
595 l2_output_config_t *out_config;
596 l2_input_config_t *config;
597 l2_bridge_domain_t *bd_config;
598 i32 l2_if_adjust = 0;
599 vnet_device_class_t *dev_class;
601 hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index);
602 config = l2input_intf_config (sw_if_index);
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_TERM);
704 /* Make sure last-chance drop is configured */
705 config->feature_bitmap |= L2INPUT_FEAT_DROP;
707 /* Make sure xconnect is disabled */
708 config->feature_bitmap &= ~L2INPUT_FEAT_XCONNECT;
710 /* Set up bridge domain */
711 bd_config = l2input_bd_config (bd_index);
712 bd_validate (bd_config);
714 /* TODO: think: add l2fib entry even for non-bvi interface? */
716 /* Do BVI interface initializations */
717 if (L2_BD_PORT_TYPE_BVI == port_type)
719 vnet_sw_interface_t *si;
721 /* ensure BD has no bvi interface (or replace that one with this??) */
722 if (bd_config->bvi_sw_if_index != ~0)
724 return MODE_ERROR_BVI_DEF; /* bd already has a bvi interface */
726 bd_config->bvi_sw_if_index = sw_if_index;
729 /* create the l2fib entry for the bvi interface */
730 l2fib_add_entry (hi->hw_address, bd_index, sw_if_index,
731 L2FIB_ENTRY_RESULT_FLAG_BVI |
732 L2FIB_ENTRY_RESULT_FLAG_STATIC);
734 /* Disable learning by default. no use since l2fib entry is static. */
735 config->feature_bitmap &= ~L2INPUT_FEAT_LEARN;
737 /* since this is a BVI interface we want to flood to it */
738 si = vnet_get_sw_interface (vnm, sw_if_index);
739 si->flood_class = VNET_FLOOD_CLASS_BVI;
740 member_flags = L2_FLOOD_MEMBER_BVI;
742 else if (L2_BD_PORT_TYPE_UU_FWD == port_type)
744 bd_config->uu_fwd_sw_if_index = sw_if_index;
745 bd_config->feature_bitmap |= L2INPUT_FEAT_UU_FWD;
749 member_flags = L2_FLOOD_MEMBER_NORMAL;
752 if (L2_BD_PORT_TYPE_NORMAL == port_type ||
753 L2_BD_PORT_TYPE_BVI == port_type)
755 /* Add interface to bridge-domain flood vector */
756 l2_flood_member_t member = {
757 .sw_if_index = sw_if_index,
758 .flags = member_flags,
761 bd_add_member (bd_config, &member);
764 else if (mode == MODE_L2_XC)
766 config->xconnect = 1;
768 config->output_sw_if_index = xc_sw_if_index;
770 /* Make sure last-chance drop is configured */
771 config->feature_bitmap |= L2INPUT_FEAT_DROP;
773 /* Make sure bridging features are disabled */
774 config->feature_bitmap &=
775 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
777 config->feature_bitmap |= L2INPUT_FEAT_XCONNECT;
778 shg = 0; /* not used in xconnect */
780 else if (mode == MODE_L2_CLASSIFY)
782 config->xconnect = 1;
784 config->output_sw_if_index = xc_sw_if_index;
786 /* Make sure last-chance drop is configured */
787 config->feature_bitmap |=
788 L2INPUT_FEAT_DROP | L2INPUT_FEAT_INPUT_CLASSIFY;
790 /* Make sure bridging features are disabled */
791 config->feature_bitmap &=
792 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
793 shg = 0; /* not used in xconnect */
795 /* Insure all packets go to ethernet-input */
796 ethernet_set_rx_redirect (vnet_main, hi, 1);
799 /* set up split-horizon group and set output feature bit */
801 out_config = l2output_intf_config (sw_if_index);
802 out_config->shg = shg;
803 out_config->feature_bitmap |= L2OUTPUT_FEAT_OUTPUT;
806 * Test: remove this when non-IP features can be configured.
807 * Enable a non-IP feature to test IP feature masking
808 * config->feature_bitmap |= L2INPUT_FEAT_CTRL_PKT;
814 /* Adjust count of L2 interfaces */
815 hi->l2_if_count += l2_if_adjust;
817 if (hi->hw_class_index == ethernet_hw_interface_class.index)
819 if ((hi->l2_if_count == 1) && (l2_if_adjust == 1))
821 /* Just added first L2 interface on this port */
823 /* Set promiscuous mode on the l2 interface */
824 ethernet_set_flags (vnet_main, hi->hw_if_index,
825 ETHERNET_INTERFACE_FLAG_ACCEPT_ALL);
827 /* ensure all packets go to ethernet-input */
828 ethernet_set_rx_redirect (vnet_main, hi, 1);
831 else if ((hi->l2_if_count == 0) && (l2_if_adjust == -1))
833 /* Just removed only L2 subinterface on this port */
835 /* Disable promiscuous mode on the l2 interface */
836 ethernet_set_flags (vnet_main, hi->hw_if_index, 0);
838 /* Allow ip packets to go directly to ip4-input etc */
839 ethernet_set_rx_redirect (vnet_main, hi, 0);
843 /* Set up the L2/L3 flag in the interface parsing tables */
844 ethernet_sw_interface_set_l2_mode (vnm, sw_if_index, (mode != MODE_L3));
846 dev_class = vnet_get_device_class (vnet_main, hi->dev_class_index);
847 if (dev_class->set_l2_mode_function)
849 dev_class->set_l2_mode_function (vnet_main, hi, l2_if_adjust);
856 * Set subinterface in bridging mode with a bridge-domain ID.
858 * set interface l2 bridge <interface> <bd> [bvi] [split-horizon-group]
860 static clib_error_t *
861 int_l2_bridge (vlib_main_t * vm,
862 unformat_input_t * input, vlib_cli_command_t * cmd)
864 vnet_main_t *vnm = vnet_get_main ();
865 l2_bd_port_type_t port_type;
866 clib_error_t *error = 0;
872 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
874 error = clib_error_return (0, "unknown interface `%U'",
875 format_unformat_error, input);
879 if (!unformat (input, "%d", &bd_id))
881 error = clib_error_return (0, "expected bridge domain ID `%U'",
882 format_unformat_error, input);
886 if (bd_id > L2_BD_ID_MAX)
888 error = clib_error_return (0, "bridge domain ID exceed 16M limit",
889 format_unformat_error, input);
892 bd_index = bd_find_or_add_bd_index (&bd_main, bd_id);
895 port_type = L2_BD_PORT_TYPE_NORMAL;
896 if (unformat (input, "bvi"))
897 port_type = L2_BD_PORT_TYPE_BVI;
898 if (unformat (input, "uu-fwd"))
899 port_type = L2_BD_PORT_TYPE_UU_FWD;
901 /* optional split horizon group */
903 (void) unformat (input, "%d", &shg);
905 /* set the interface mode */
907 set_int_l2_mode (vm, vnm, MODE_L2_BRIDGE, sw_if_index, bd_index,
910 if (rc == MODE_ERROR_ETH)
912 error = clib_error_return (0, "bridged interface must be ethernet",
913 format_unformat_error, input);
915 else if (rc == MODE_ERROR_BVI_DEF)
918 clib_error_return (0, "bridge-domain already has a bvi interface",
919 format_unformat_error, input);
923 error = clib_error_return (0, "invalid configuration for interface",
924 format_unformat_error, input);
934 * Use this command put an interface into Layer 2 bridge domain. If a
935 * bridge-domain with the provided bridge-domain-id does not exist, it
936 * will be created. Interfaces in a bridge-domain forward packets to
937 * other interfaces in the same bridge-domain based on destination mac
938 * address. To remove an interface from a the Layer 2 bridge domain,
939 * put the interface in a different mode, for example Layer 3 mode.
941 * Optionally, an interface can be added to a Layer 2 bridge-domain as
942 * a Bridged Virtual Interface (bvi). Only one interface in a Layer 2
943 * bridge-domain can be a bvi.
945 * Optionally, a split-horizon group can also be specified. This defaults
946 * to 0 if not specified.
949 * Example of how to configure a Layer 2 bridge-domain with three
950 * interfaces (where 200 is the bridge-domain-id):
951 * @cliexcmd{set interface l2 bridge GigabitEthernet0/8/0.200 200}
952 * This interface is added a BVI interface:
953 * @cliexcmd{set interface l2 bridge GigabitEthernet0/9/0.200 200 bvi}
954 * This interface also has a split-horizon group of 1 specified:
955 * @cliexcmd{set interface l2 bridge GigabitEthernet0/a/0.200 200 1}
956 * Example of how to remove an interface from a Layer2 bridge-domain:
957 * @cliexcmd{set interface l3 GigabitEthernet0/a/0.200}
960 VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = {
961 .path = "set interface l2 bridge",
962 .short_help = "set interface l2 bridge <interface> <bridge-domain-id> [bvi|uu-fwd] [shg]",
963 .function = int_l2_bridge,
968 * Set subinterface in xconnect mode with another interface.
970 * set interface l2 xconnect <interface> <peer interface>
972 static clib_error_t *
973 int_l2_xc (vlib_main_t * vm,
974 unformat_input_t * input, vlib_cli_command_t * cmd)
976 vnet_main_t *vnm = vnet_get_main ();
977 clib_error_t *error = 0;
981 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
983 error = clib_error_return (0, "unknown interface `%U'",
984 format_unformat_error, input);
989 (input, unformat_vnet_sw_interface, vnm, &xc_sw_if_index))
991 error = clib_error_return (0, "unknown peer interface `%U'",
992 format_unformat_error, input);
996 /* set the interface mode */
998 (vm, vnm, MODE_L2_XC, sw_if_index, 0, L2_BD_PORT_TYPE_NORMAL,
1001 error = clib_error_return (0, "invalid configuration for interface",
1002 format_unformat_error, input);
1011 * Use this command put an interface into Layer 2 cross-connect mode.
1012 * Both interfaces must be in this mode for bi-directional traffic. All
1013 * packets received on one interface will be transmitted to the other.
1014 * To remove the Layer 2 cross-connect, put the interface in a different
1015 * mode, for example Layer 3 mode.
1018 * Example of how to configure a Layer2 cross-connect between two interfaces:
1019 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300}
1020 * @cliexcmd{set interface l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300}
1021 * Example of how to remove a Layer2 cross-connect:
1022 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.300}
1023 * @cliexcmd{set interface l3 GigabitEthernet0/9/0.300}
1026 VLIB_CLI_COMMAND (int_l2_xc_cli, static) = {
1027 .path = "set interface l2 xconnect",
1028 .short_help = "set interface l2 xconnect <interface> <peer interface>",
1029 .function = int_l2_xc,
1034 * Set subinterface in L3 mode.
1035 * The CLI format is:
1036 * set interface l3 <interface>
1038 static clib_error_t *
1039 int_l3 (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
1041 vnet_main_t *vnm = vnet_get_main ();
1042 clib_error_t *error = 0;
1045 if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
1047 error = clib_error_return (0, "unknown interface `%U'",
1048 format_unformat_error, input);
1052 /* set the interface mode */
1053 if (set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0,
1054 L2_BD_PORT_TYPE_NORMAL, 0, 0))
1056 error = clib_error_return (0, "invalid configuration for interface",
1057 format_unformat_error, input);
1066 * Modify the packet processing mode of the interface to Layer 3, which
1067 * implies packets will be routed. This is the default mode of an interface.
1068 * Use this command to remove an interface from a Layer 2 cross-connect or a
1072 * Example of how to set the mode of an interface to Layer 3:
1073 * @cliexcmd{set interface l3 GigabitEthernet0/8/0.200}
1076 VLIB_CLI_COMMAND (int_l3_cli, static) = {
1077 .path = "set interface l3",
1078 .short_help = "set interface l3 <interface>",
1084 * Show interface mode.
1085 * The CLI format is:
1086 * show mode [<if-name1> <if-name2> ...]
1088 static clib_error_t *
1089 show_int_mode (vlib_main_t * vm,
1090 unformat_input_t * input, vlib_cli_command_t * cmd)
1092 vnet_main_t *vnm = vnet_get_main ();
1093 clib_error_t *error = 0;
1096 vnet_interface_main_t *im = &vnm->interface_main;
1098 vnet_sw_interface_t *si, *sis = 0;
1099 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1103 /* See if user wants to show specific interface */
1105 (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
1107 si = pool_elt_at_index (im->sw_interfaces, sw_if_index);
1108 vec_add1 (sis, si[0]);
1112 error = clib_error_return (0, "unknown input `%U'",
1113 format_unformat_error, input);
1118 if (vec_len (sis) == 0) /* Get all interfaces */
1120 /* Gather interfaces. */
1121 sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces));
1124 pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); }));
1128 vec_foreach (si, sis)
1130 l2_input_config_t *config = l2input_intf_config (si->sw_if_index);
1135 bd_id = l2input_main.bd_configs[config->bd_index].bd_id;
1137 args = format (0, "bd_id %d%s%d", bd_id,
1138 config->bvi ? " bvi shg " : " shg ", config->shg);
1140 else if (config->xconnect)
1142 mode = "l2 xconnect";
1143 args = format (0, "%U",
1144 format_vnet_sw_if_index_name,
1145 vnm, config->output_sw_if_index);
1150 args = format (0, " ");
1152 vlib_cli_output (vm, "%s %U %v\n",
1154 format_vnet_sw_if_index_name,
1155 vnm, si->sw_if_index, args);
1166 * Show the packet processing mode (Layer2 cross-connect, Layer 2 bridge,
1167 * Layer 3 routed) of all interfaces and sub-interfaces, or limit the
1168 * output to just the provided list of interfaces and sub-interfaces.
1169 * The output shows the mode, the interface, and if the interface is
1170 * a member of a bridge, the bridge-domain-id and the split horizon group (shg).
1173 * Example of displaying the mode of all interfaces:
1174 * @cliexstart{show mode}
1176 * l3 GigabitEthernet0/8/0
1177 * l3 GigabitEthernet0/9/0
1178 * l3 GigabitEthernet0/a/0
1179 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1180 * l2 bridge GigabitEthernet0/9/0.200 bd_id 200 shg 0
1181 * l2 bridge GigabitEthernet0/a/0.200 bd_id 200 shg 0
1182 * l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300
1183 * l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300
1185 * Example of displaying the mode of a selected list of interfaces:
1186 * @cliexstart{show mode GigabitEthernet0/8/0 GigabitEthernet0/8/0.200}
1187 * l3 GigabitEthernet0/8/0
1188 * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0
1192 VLIB_CLI_COMMAND (show_l2_mode, static) = {
1193 .path = "show mode",
1194 .short_help = "show mode [<if-name1> <if-name2> ...]",
1195 .function = show_int_mode,
1199 #define foreach_l2_init_function \
1200 _(feat_bitmap_drop_init) \
1202 _(l2_input_classify_init) \
1205 _(l2_in_out_acl_init) \
1209 _(l2_efp_filter_init) \
1217 l2_init (vlib_main_t * vm)
1219 clib_error_t *error;
1222 if ((error = vlib_call_init_function (vm, a))) return error; } \
1224 foreach_l2_init_function;
1229 VLIB_INIT_FUNCTION (l2_init);
1232 * fd.io coding-style-patch-verification: ON
1235 * eval: (c-set-style "gnu")