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>
33 #include <vppinfra/error.h>
34 #include <vppinfra/hash.h>
35 #include <vppinfra/cache.h>
38 vnet_per_buffer_interface_output_hw_interface_add_del (
39 vnet_main_t * vnm, u32 hw_if_index, u32 is_create);
41 // Feature graph node names
42 static char * l2input_feat_names[] = {
43 #define _(sym,name) name,
48 char **l2input_get_feat_names(void) {
49 return l2input_feat_names;
54 /* per-pkt trace data */
61 /* packet trace format function */
62 static u8 * format_l2input_trace (u8 * s, va_list * args)
64 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
65 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
66 l2input_trace_t * t = va_arg (*args, l2input_trace_t *);
68 s = format (s, "l2-input: sw_if_index %d dst %U src %U",
70 format_ethernet_address, t->dst,
71 format_ethernet_address, t->src);
75 l2input_main_t l2input_main;
77 static vlib_node_registration_t l2input_node;
79 #define foreach_l2input_error \
80 _(L2INPUT, "L2 input packets") \
81 _(DROP, "L2 input drops")
84 #define _(sym,str) L2INPUT_ERROR_##sym,
90 static char * l2input_error_strings[] = {
91 #define _(sym,string) string,
104 static_always_inline void
105 classify_and_dispatch (vlib_main_t * vm,
106 vlib_node_runtime_t * node,
108 l2input_main_t * msm,
112 // Load L2 input feature struct
113 // Load bridge domain struct
114 // Parse ethernet header to determine unicast/mcast/broadcast
115 // take L2 input stat
116 // classify packet as IP/UDP/TCP, control, other
117 // mask feature bitmap
118 // go to first node in bitmap
119 // Later: optimize VTM
122 // set tx sw-if-handle
125 __attribute__((unused)) u8 l2bcast;
126 __attribute__((unused)) u8 l2mcast;
127 __attribute__((unused)) u8 l2_stat_kind;
130 l2_input_config_t *config;
131 l2_bridge_domain_t *bd_config;
135 ethernet_header_t * h0;
140 #define get_u32(addr) ( *((u32 *)(addr)) )
141 #define get_u16(addr) ( *((u16 *)(addr)) )
142 #define STATS_IF_LAYER2_UCAST_INPUT_CNT 0
143 #define STATS_IF_LAYER2_MCAST_INPUT_CNT 1
144 #define STATS_IF_LAYER2_BCAST_INPUT_CNT 2
146 // Check for from-BVI processing
147 // When we come from ethernet-input, TX is ~0
148 if (PREDICT_FALSE (vnet_buffer(b0)->sw_if_index[VLIB_TX] != ~0)) {
149 // Set up for a from-bvi packet
154 vnet_buffer(b0)->sw_if_index[VLIB_TX]);
158 // The RX interface can be changed by bvi_to_l2()
159 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
161 h0 = vlib_buffer_get_current (b0);
162 l3h0 = (u8 *)h0 + vnet_buffer(b0)->l2.l2_len;
164 // Determine L3 packet type. Only need to check the common types.
165 // Used to filter out features that don't apply to common packets.
166 ethertype = clib_net_to_host_u16(get_u16(l3h0 - 2));
167 if (ethertype == ETHERNET_TYPE_IP4) {
168 protocol = ((ip4_header_t *)l3h0)->protocol;
169 if ((protocol == IP_PROTOCOL_UDP) ||
170 (protocol == IP_PROTOCOL_TCP)) {
171 feat_mask = IP_UDP_TCP_FEAT_MASK;
173 feat_mask = IP4_FEAT_MASK;
175 } else if (ethertype == ETHERNET_TYPE_IP6) {
176 protocol = ((ip6_header_t *)l3h0)->protocol;
177 // Don't bother checking for extension headers for now
178 if ((protocol == IP_PROTOCOL_UDP) ||
179 (protocol == IP_PROTOCOL_TCP)) {
180 feat_mask = IP_UDP_TCP_FEAT_MASK;
182 feat_mask = IP6_FEAT_MASK;
184 } else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST) {
185 feat_mask = IP6_FEAT_MASK;
187 // allow all features
191 // determine layer2 kind for stat and mask
192 mcast_dmac = ethernet_address_cast(h0->dst_address);
195 l2_stat_kind = STATS_IF_LAYER2_UCAST_INPUT_CNT;
196 if (PREDICT_FALSE (mcast_dmac)) {
197 u32 *dsthi = (u32 *) &h0->dst_address[0];
198 u32 *dstlo = (u32 *) &h0->dst_address[2];
200 // Disable bridge forwarding (flooding will execute instead if not xconnect)
201 feat_mask &= ~(L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD);
202 if (ethertype != ETHERNET_TYPE_ARP) // Disable ARP-term for non-ARP packet
203 feat_mask &= ~(L2INPUT_FEAT_ARP_TERM);
205 // dest mac is multicast or broadcast
206 if ((*dstlo == 0xFFFFFFFF) && (*dsthi == 0xFFFFFFFF)) {
207 // dest mac == FF:FF:FF:FF:FF:FF
208 l2_stat_kind = STATS_IF_LAYER2_BCAST_INPUT_CNT;
211 l2_stat_kind = STATS_IF_LAYER2_MCAST_INPUT_CNT;
215 // TODO: take l2 stat
217 // Get config for the input interface
218 config = vec_elt_at_index(msm->configs, sw_if_index0);
220 // Save split horizon group, use 0 for BVI to make sure not dropped
221 vnet_buffer(b0)->l2.shg = bvi_flg ? 0 : config->shg;
223 if (config->xconnect) {
224 // Set the output interface
225 vnet_buffer(b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index;
229 // Do bridge-domain processing
230 bd_index0 = config->bd_index;
231 // save BD ID for next feature graph nodes
232 vnet_buffer(b0)->l2.bd_index = bd_index0;
234 // Get config for the bridge domain interface
235 bd_config = vec_elt_at_index(msm->bd_configs, bd_index0);
237 // Process bridge domain feature enables.
238 // To perform learning/flooding/forwarding, the corresponding bit
239 // must be enabled in both the input interface config and in the
240 // bridge domain config. In the bd_bitmap, bits for features other
241 // than learning/flooding/forwarding should always be set.
242 feat_mask = feat_mask & bd_config->feature_bitmap;
245 // mask out features from bitmap using packet type and bd config
246 feature_bitmap = config->feature_bitmap & feat_mask;
248 // save for next feature graph nodes
249 vnet_buffer(b0)->l2.feature_bitmap = feature_bitmap;
251 // Determine the next node
252 *next0 = feat_bitmap_get_next_node_index(msm->feat_next_node_index,
258 l2input_node_fn (vlib_main_t * vm,
259 vlib_node_runtime_t * node,
260 vlib_frame_t * frame)
262 u32 n_left_from, * from, * to_next;
263 l2input_next_t next_index;
264 l2input_main_t * msm = &l2input_main;
265 vlib_node_t *n = vlib_get_node (vm, l2input_node.index);
266 u32 node_counter_base_index = n->error_heap_index;
267 vlib_error_main_t * em = &vm->error_main;
268 u32 cpu_index = os_get_cpu_number();
270 from = vlib_frame_vector_args (frame);
271 n_left_from = frame->n_vectors; /* number of packets to process */
272 next_index = node->cached_next_index;
274 while (n_left_from > 0)
278 /* get space to enqueue frame to graph node "next_index" */
279 vlib_get_next_frame (vm, node, next_index,
280 to_next, n_left_to_next);
282 while (n_left_from >= 6 && n_left_to_next >= 2)
285 vlib_buffer_t * b0, * b1;
287 u32 sw_if_index0, sw_if_index1;
289 /* Prefetch next iteration. */
291 vlib_buffer_t * p2, * p3, * p4 , * p5;
292 u32 sw_if_index2, sw_if_index3;
294 p2 = vlib_get_buffer (vm, from[2]);
295 p3 = vlib_get_buffer (vm, from[3]);
296 p4 = vlib_get_buffer (vm, from[4]);
297 p5 = vlib_get_buffer (vm, from[5]);
299 // Prefetch the buffer header and packet for the N+2 loop iteration
300 vlib_prefetch_buffer_header (p4, LOAD);
301 vlib_prefetch_buffer_header (p5, LOAD);
303 CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
304 CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
306 // Prefetch the input config for the N+1 loop iteration
307 // This depends on the buffer header above
308 sw_if_index2 = vnet_buffer(p2)->sw_if_index[VLIB_RX];
309 sw_if_index3 = vnet_buffer(p3)->sw_if_index[VLIB_RX];
310 CLIB_PREFETCH (&msm->configs[sw_if_index2], CLIB_CACHE_LINE_BYTES, LOAD);
311 CLIB_PREFETCH (&msm->configs[sw_if_index3], CLIB_CACHE_LINE_BYTES, LOAD);
313 // Don't bother prefetching the bridge-domain config (which
314 // depends on the input config above). Only a small number of
315 // bridge domains are expected. Plus the structure is small
316 // and several fit in a cache line.
319 /* speculatively enqueue b0 and b1 to the current next frame */
320 /* bi is "buffer index", b is pointer to the buffer */
321 to_next[0] = bi0 = from[0];
322 to_next[1] = bi1 = from[1];
328 b0 = vlib_get_buffer (vm, bi0);
329 b1 = vlib_get_buffer (vm, bi1);
331 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE))) {
332 /* RX interface handles */
333 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
334 sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
336 if (b0->flags & VLIB_BUFFER_IS_TRACED) {
337 ethernet_header_t * h0 = vlib_buffer_get_current (b0);
339 vlib_add_trace (vm, node, b0, sizeof (*t));
340 t->sw_if_index = sw_if_index0;
341 clib_memcpy(t->src, h0->src_address, 6);
342 clib_memcpy(t->dst, h0->dst_address, 6);
344 if (b1->flags & VLIB_BUFFER_IS_TRACED) {
345 ethernet_header_t * h1 = vlib_buffer_get_current (b1);
347 vlib_add_trace (vm, node, b1, sizeof (*t));
348 t->sw_if_index = sw_if_index1;
349 clib_memcpy(t->src, h1->src_address, 6);
350 clib_memcpy(t->dst, h1->dst_address, 6);
354 em->counters[node_counter_base_index + L2INPUT_ERROR_L2INPUT] += 2;
356 classify_and_dispatch (vm,
363 classify_and_dispatch (vm,
370 /* verify speculative enqueues, maybe switch current next frame */
371 /* if next0==next1==next_index then nothing special needs to be done */
372 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
373 to_next, n_left_to_next,
374 bi0, bi1, next0, next1);
377 while (n_left_from > 0 && n_left_to_next > 0)
384 /* speculatively enqueue b0 to the current next frame */
392 b0 = vlib_get_buffer (vm, bi0);
394 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
395 && (b0->flags & VLIB_BUFFER_IS_TRACED))) {
396 ethernet_header_t * h0 = vlib_buffer_get_current (b0);
398 vlib_add_trace (vm, node, b0, sizeof (*t));
399 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
400 t->sw_if_index = sw_if_index0;
401 clib_memcpy(t->src, h0->src_address, 6);
402 clib_memcpy(t->dst, h0->dst_address, 6);
405 em->counters[node_counter_base_index + L2INPUT_ERROR_L2INPUT] += 1;
407 classify_and_dispatch (vm,
414 /* verify speculative enqueue, maybe switch current next frame */
415 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
416 to_next, n_left_to_next,
420 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
423 return frame->n_vectors;
427 VLIB_REGISTER_NODE (l2input_node,static) = {
428 .function = l2input_node_fn,
430 .vector_size = sizeof (u32),
431 .format_trace = format_l2input_trace,
432 .format_buffer = format_ethernet_header_with_length,
433 .type = VLIB_NODE_TYPE_INTERNAL,
435 .n_errors = ARRAY_LEN(l2input_error_strings),
436 .error_strings = l2input_error_strings,
438 .n_next_nodes = L2INPUT_N_NEXT,
440 /* edit / add dispositions here */
442 [L2INPUT_NEXT_LEARN] = "l2-learn",
443 [L2INPUT_NEXT_FWD] = "l2-fwd",
444 [L2INPUT_NEXT_DROP] = "error-drop",
448 clib_error_t *l2input_init (vlib_main_t *vm)
450 l2input_main_t * mp = &l2input_main;
453 mp->vnet_main = vnet_get_main();
455 // Get packets RX'd from L2 interfaces
456 ethernet_register_l2_input (vm, l2input_node.index);
458 // Create the config vector
459 vec_validate(mp->configs, 100);
460 // create 100 sw interface entries and zero them
462 // Initialize the feature next-node indexes
463 feat_bitmap_init_next_nodes(vm,
466 l2input_get_feat_names(),
467 mp->feat_next_node_index);
472 VLIB_INIT_FUNCTION (l2input_init);
475 // Get a pointer to the config for the given interface
476 l2_input_config_t * l2input_intf_config (u32 sw_if_index)
478 l2input_main_t * mp = &l2input_main;
480 vec_validate(mp->configs, sw_if_index);
481 return vec_elt_at_index(mp->configs, sw_if_index);
484 // Enable (or disable) the feature in the bitmap for the given interface
485 u32 l2input_intf_bitmap_enable (u32 sw_if_index,
489 l2input_main_t * mp = &l2input_main;
490 l2_input_config_t *config;
492 vec_validate(mp->configs, sw_if_index);
493 config = vec_elt_at_index(mp->configs, sw_if_index);
496 config->feature_bitmap |= feature_bitmap;
498 config->feature_bitmap &= ~feature_bitmap;
501 return config->feature_bitmap;
504 u32 l2input_set_bridge_features(u32 bd_index,
505 u32 feat_mask, u32 feat_value)
507 l2_bridge_domain_t * bd_config;
508 vec_validate (l2input_main.bd_configs, bd_index);
509 bd_config = vec_elt_at_index(l2input_main.bd_configs, bd_index);
510 bd_validate (bd_config);
511 bd_config->feature_bitmap = (bd_config->feature_bitmap & ~feat_mask) | feat_value;
512 return bd_config->feature_bitmap;
515 // Set the subinterface to run in l2 or l3 mode.
516 // for L3 mode, just the sw_if_index is specified
517 // for bridged mode, the bd id and bvi flag are also specified
518 // for xconnect mode, the peer sw_if_index is also specified
519 // Return 0 if ok, or non-0 if there was an error
521 u32 set_int_l2_mode (vlib_main_t * vm,
522 vnet_main_t * vnet_main,
525 u32 bd_index, // for bridged interface
526 u32 bvi, // the bridged interface is the BVI
527 u32 shg, // the bridged interface's split horizon group
528 u32 xc_sw_if_index) // peer interface for xconnect
530 l2input_main_t * mp = &l2input_main;
531 vnet_main_t * vnm = vnet_get_main();
532 vnet_hw_interface_t * hi;
533 l2_output_config_t * out_config;
534 l2_input_config_t * config;
535 l2_bridge_domain_t * bd_config;
536 l2_flood_member_t member;
538 i32 l2_if_adjust = 0;
540 hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index);
542 vec_validate(mp->configs, sw_if_index);
543 config = vec_elt_at_index(mp->configs, sw_if_index);
545 if (config->bridge) {
546 // Interface is already in bridge mode. Undo the existing config.
547 bd_config = vec_elt_at_index(mp->bd_configs, config->bd_index);
549 // remove interface from flood vector
550 bd_remove_member (bd_config, sw_if_index);
552 // undo any BVI-related config
553 if (bd_config->bvi_sw_if_index == sw_if_index) {
554 bd_config->bvi_sw_if_index = ~0;
557 // restore output node
558 hi->output_node_index = bd_config->saved_bvi_output_node_index;
560 // delete the l2fib entry for the bvi interface
561 mac = *((u64 *)hi->hw_address);
562 l2fib_del_entry (mac, config->bd_index);
564 // Let interface-output node know that the output node index changed
565 vnet_per_buffer_interface_output_hw_interface_add_del(
566 vnet_main, hi->hw_if_index, 0);
569 } else if (config->xconnect) {
573 // Initialize the l2-input configuration for the interface
574 if (mode == MODE_L3) {
575 config->xconnect = 0;
578 config->bd_index = 0;
579 config->feature_bitmap = L2INPUT_FEAT_DROP;
580 } else if (mode == MODE_L2_CLASSIFY) {
581 config->xconnect = 1;
583 config->output_sw_if_index = xc_sw_if_index;
585 // Make sure last-chance drop is configured
586 config->feature_bitmap |= L2INPUT_FEAT_DROP | L2INPUT_FEAT_CLASSIFY;
588 // Make sure bridging features are disabled
589 config->feature_bitmap &=
590 ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
591 shg = 0; // not used in xconnect
593 // Insure all packets go to ethernet-input
594 ethernet_set_rx_redirect (vnet_main, hi, 1);
597 if (mode == MODE_L2_BRIDGE) {
599 * Remove a check that the interface must be an Ethernet.
600 * Specifically so we can bridge to L3 tunnel interfaces.
602 * if (hi->hw_class_index != ethernet_hw_interface_class.index)
606 return MODE_ERROR_ETH; // non-ethernet
608 config->xconnect = 0;
610 config->bd_index = bd_index;
612 // Enable forwarding, flooding, learning and ARP termination by default
613 // (note that ARP term is disabled on BD feature bitmap by default)
614 config->feature_bitmap |= L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD |
615 L2INPUT_FEAT_FLOOD | L2INPUT_FEAT_LEARN | L2INPUT_FEAT_ARP_TERM;
617 // Make sure last-chance drop is configured
618 config->feature_bitmap |= L2INPUT_FEAT_DROP;
620 // Make sure xconnect is disabled
621 config->feature_bitmap &= ~L2INPUT_FEAT_XCONNECT;
623 // Set up bridge domain
624 vec_validate(mp->bd_configs, bd_index);
625 bd_config = vec_elt_at_index(mp->bd_configs, bd_index);
626 bd_validate (bd_config);
628 // TODO: think: add l2fib entry even for non-bvi interface?
630 // Do BVI interface initializations
632 // insure BD has no bvi interface (or replace that one with this??)
633 if (bd_config->bvi_sw_if_index != ~0) {
634 return MODE_ERROR_BVI_DEF; // bd already has a bvi interface
636 bd_config->bvi_sw_if_index = sw_if_index;
639 // make BVI outputs go to l2-input
640 bd_config->saved_bvi_output_node_index = hi->output_node_index;
641 hi->output_node_index = l2input_node.index;
643 // create the l2fib entry for the bvi interface
644 mac = *((u64 *)hi->hw_address);
645 l2fib_add_entry (mac, bd_index, sw_if_index, 1, 0, 1); // static + bvi
647 // Disable learning by default. no use since l2fib entry is static.
648 config->feature_bitmap &= ~L2INPUT_FEAT_LEARN;
650 // Let interface-output node know that the output node index changed
651 // so output can be sent via BVI to BD
652 vnet_per_buffer_interface_output_hw_interface_add_del(
653 vnet_main, hi->hw_if_index, 0);
656 // Add interface to bridge-domain flood vector
657 member.sw_if_index = sw_if_index;
658 member.flags = bvi ? L2_FLOOD_MEMBER_BVI : L2_FLOOD_MEMBER_NORMAL;
660 bd_add_member (bd_config, &member);
663 config->xconnect = 1;
665 config->output_sw_if_index = xc_sw_if_index;
667 // Make sure last-chance drop is configured
668 config->feature_bitmap |= L2INPUT_FEAT_DROP;
670 // Make sure bridging features are disabled
671 config->feature_bitmap &= ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD);
673 config->feature_bitmap |= L2INPUT_FEAT_XCONNECT;
674 shg = 0; // not used in xconnect
677 // set up split-horizon group
679 out_config = l2output_intf_config (sw_if_index);
680 out_config->shg = shg;
682 // Test: remove this when non-IP features can be configured.
683 // Enable a non-IP feature to test IP feature masking
684 // config->feature_bitmap |= L2INPUT_FEAT_CTRL_PKT;
689 // Adjust count of L2 interfaces
690 hi->l2_if_count += l2_if_adjust;
692 if (hi->hw_class_index == ethernet_hw_interface_class.index) {
693 if ((hi->l2_if_count == 1) && (l2_if_adjust == 1)) {
694 // Just added first L2 interface on this port
696 // Set promiscuous mode on the l2 interface
697 ethernet_set_flags (vnet_main, hi->hw_if_index,
698 ETHERNET_INTERFACE_FLAG_ACCEPT_ALL);
700 // Insure all packets go to ethernet-input
701 ethernet_set_rx_redirect (vnet_main, hi, 1);
703 } else if ((hi->l2_if_count == 0) && (l2_if_adjust == -1)) {
704 // Just removed only L2 subinterface on this port
706 // Disable promiscuous mode on the l2 interface
707 ethernet_set_flags (vnet_main, hi->hw_if_index, 0);
709 // Allow ip packets to go directly to ip4-input etc
710 ethernet_set_rx_redirect (vnet_main, hi, 0);
714 // Set up the L2/L3 flag in the interface parsing tables
715 ethernet_sw_interface_set_l2_mode(vnm, sw_if_index, (mode!=MODE_L3));
720 // set subinterface in bridging mode with a bridge-domain ID
721 // The CLI format is:
722 // set interface l2 bridge <interface> <bd> [bvi] [split-horizon-group]
723 static clib_error_t *
724 int_l2_bridge (vlib_main_t * vm,
725 unformat_input_t * input,
726 vlib_cli_command_t * cmd)
728 vnet_main_t * vnm = vnet_get_main();
729 clib_error_t * error = 0;
736 if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
738 error = clib_error_return (0, "unknown interface `%U'",
739 format_unformat_error, input);
743 if (!unformat (input, "%d", &bd_id)) {
744 error = clib_error_return (0, "expected bridge domain ID `%U'",
745 format_unformat_error, input);
749 bd_index = bd_find_or_add_bd_index (&bd_main, bd_id);
752 bvi = unformat (input, "bvi");
754 // optional split horizon group
756 (void) unformat (input, "%d", &shg);
758 // set the interface mode
759 if ((rc = set_int_l2_mode(vm, vnm, MODE_L2_BRIDGE, sw_if_index, bd_index, bvi, shg, 0))) {
760 if (rc == MODE_ERROR_ETH) {
761 error = clib_error_return (0, "bridged interface must be ethernet",
762 format_unformat_error, input);
763 } else if (rc == MODE_ERROR_BVI_DEF) {
764 error = clib_error_return (0, "bridge-domain already has a bvi interface",
765 format_unformat_error, input);
767 error = clib_error_return (0, "invalid configuration for interface",
768 format_unformat_error, input);
777 VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = {
778 .path = "set interface l2 bridge",
779 .short_help = "set interface to L2 bridging mode in <bridge-domain ID> [bvi] [shg]",
780 .function = int_l2_bridge,
783 // set subinterface in xconnect mode with another interface
784 // The CLI format is:
785 // set interface l2 xconnect <interface> <peer interface>
786 static clib_error_t *
787 int_l2_xc (vlib_main_t * vm,
788 unformat_input_t * input,
789 vlib_cli_command_t * cmd)
791 vnet_main_t * vnm = vnet_get_main();
792 clib_error_t * error = 0;
796 if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
798 error = clib_error_return (0, "unknown interface `%U'",
799 format_unformat_error, input);
803 if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &xc_sw_if_index))
805 error = clib_error_return (0, "unknown peer interface `%U'",
806 format_unformat_error, input);
810 // set the interface mode
811 if (set_int_l2_mode(vm, vnm, MODE_L2_XC, sw_if_index, 0, 0, 0, xc_sw_if_index)) {
812 error = clib_error_return (0, "invalid configuration for interface",
813 format_unformat_error, input);
821 VLIB_CLI_COMMAND (int_l2_xc_cli, static) = {
822 .path = "set interface l2 xconnect",
823 .short_help = "set interface to L2 cross-connect mode with <peer interface>",
824 .function = int_l2_xc,
827 // set subinterface in L3 mode
828 // The CLI format is:
829 // set interface l3 <interface>
830 static clib_error_t *
831 int_l3 (vlib_main_t * vm,
832 unformat_input_t * input,
833 vlib_cli_command_t * cmd)
835 vnet_main_t * vnm = vnet_get_main();
836 clib_error_t * error = 0;
839 if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
841 error = clib_error_return (0, "unknown interface `%U'",
842 format_unformat_error, input);
846 // set the interface mode
847 if (set_int_l2_mode(vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0)) {
848 error = clib_error_return (0, "invalid configuration for interface",
849 format_unformat_error, input);
857 VLIB_CLI_COMMAND (int_l3_cli, static) = {
858 .path = "set interface l3",
859 .short_help = "set interface to L3 mode",
863 // The CLI format is:
864 // show mode [<if-name1> <if-name2> ...]
865 static clib_error_t *
866 show_int_mode (vlib_main_t * vm,
867 unformat_input_t * input,
868 vlib_cli_command_t * cmd)
870 vnet_main_t * vnm = vnet_get_main();
871 clib_error_t * error = 0;
874 vnet_interface_main_t * im = &vnm->interface_main;
875 vnet_sw_interface_t * si, * sis = 0;
876 l2input_main_t * mp = &l2input_main;
877 l2_input_config_t * config;
879 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
883 /* See if user wants to show specific interface */
884 if (unformat (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
886 si = pool_elt_at_index (im->sw_interfaces, sw_if_index);
887 vec_add1 (sis, si[0]);
891 error = clib_error_return (0, "unknown input `%U'",
892 format_unformat_error, input);
898 if (vec_len (sis) == 0) /* Get all interfaces */
900 /* Gather interfaces. */
901 sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces));
903 pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); }));
906 vec_foreach (si, sis)
908 vec_validate(mp->configs, si->sw_if_index);
909 config = vec_elt_at_index(mp->configs, si->sw_if_index);
910 if (config->bridge) {
913 bd_id = l2input_main.bd_configs[config->bd_index].bd_id;
915 args = format (0, "bd_id %d%s%d", bd_id,
916 config->bvi ? " bvi shg " : " shg ", config->shg);
917 } else if (config->xconnect) {
918 mode = "l2 xconnect";
919 args = format (0, "%U",
920 format_vnet_sw_if_index_name,
921 vnm, config->output_sw_if_index);
924 args = format (0, " ");
926 vlib_cli_output (vm, "%s %U %v\n",
928 format_vnet_sw_if_index_name,
929 vnm, si->sw_if_index,
940 VLIB_CLI_COMMAND (show_l2_mode, static) = {
942 .short_help = "show mode [<if-name1> <if-name2> ...]",
943 .function = show_int_mode,
946 #define foreach_l2_init_function \
947 _(feat_bitmap_drop_init) \
949 _(l2_classify_init) \
956 _(l2_efp_filter_init) \
964 clib_error_t *l2_init (vlib_main_t * vm)
966 clib_error_t * error;
969 if ((error = vlib_call_init_function (vm, a))) return error; } \
971 foreach_l2_init_function;
976 VLIB_INIT_FUNCTION (l2_init);