2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vnet/vxlan/vxlan.h>
16 #include <vnet/ip/format.h>
17 #include <vnet/fib/fib_entry.h>
18 #include <vnet/fib/fib_table.h>
19 #include <vnet/fib/fib_entry_track.h>
20 #include <vnet/mfib/mfib_table.h>
21 #include <vnet/adj/adj_mcast.h>
22 #include <vnet/adj/rewrite.h>
23 #include <vnet/dpo/drop_dpo.h>
24 #include <vnet/interface.h>
25 #include <vnet/flow/flow.h>
26 #include <vnet/udp/udp_local.h>
27 #include <vlib/vlib.h>
33 * VXLAN provides the features needed to allow L2 bridge domains (BDs)
34 * to span multiple servers. This is done by building an L2 overlay on
35 * top of an L3 network underlay using VXLAN tunnels.
37 * This makes it possible for servers to be co-located in the same data
38 * center or be separated geographically as long as they are reachable
39 * through the underlay L3 network.
41 * You can refer to this kind of L2 overlay bridge domain as a VXLAN
42 * (Virtual eXtensible VLAN) segment.
46 vxlan_main_t vxlan_main;
49 vxlan_eth_flag_change (vnet_main_t *vnm, vnet_hw_interface_t *hi, u32 flags)
56 format_decap_next (u8 * s, va_list * args)
58 u32 next_index = va_arg (*args, u32);
60 if (next_index == VXLAN_INPUT_NEXT_DROP)
61 return format (s, "drop");
63 return format (s, "index %d", next_index);
68 format_vxlan_tunnel (u8 * s, va_list * args)
70 vxlan_tunnel_t *t = va_arg (*args, vxlan_tunnel_t *);
73 "[%d] instance %d src %U dst %U src_port %d dst_port %d vni %d "
74 "fib-idx %d sw-if-idx %d ",
75 t->dev_instance, t->user_instance, format_ip46_address, &t->src,
76 IP46_TYPE_ANY, format_ip46_address, &t->dst, IP46_TYPE_ANY,
77 t->src_port, t->dst_port, t->vni, t->encap_fib_index,
80 s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_index);
82 if (PREDICT_FALSE (t->decap_next_index != VXLAN_INPUT_NEXT_L2_INPUT))
83 s = format (s, "decap-next-%U ", format_decap_next, t->decap_next_index);
85 if (PREDICT_FALSE (ip46_address_is_multicast (&t->dst)))
86 s = format (s, "mcast-sw-if-idx %d ", t->mcast_sw_if_index);
88 if (t->flow_index != ~0)
89 s = format (s, "flow-index %d [%U]", t->flow_index,
90 format_flow_enabled_hw, t->flow_index);
96 format_vxlan_name (u8 * s, va_list * args)
98 u32 dev_instance = va_arg (*args, u32);
99 vxlan_main_t *vxm = &vxlan_main;
102 if (dev_instance == ~0)
103 return format (s, "<cached-unused>");
105 if (dev_instance >= vec_len (vxm->tunnels))
106 return format (s, "<improperly-referenced>");
108 t = pool_elt_at_index (vxm->tunnels, dev_instance);
110 return format (s, "vxlan_tunnel%d", t->user_instance);
113 static clib_error_t *
114 vxlan_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
116 u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
117 VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
118 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
120 return /* no error */ 0;
124 VNET_DEVICE_CLASS (vxlan_device_class, static) = {
126 .format_device_name = format_vxlan_name,
127 .format_tx_trace = format_vxlan_encap_trace,
128 .admin_up_down_function = vxlan_interface_admin_up_down,
133 format_vxlan_header_with_length (u8 * s, va_list * args)
135 u32 dev_instance = va_arg (*args, u32);
136 s = format (s, "unimplemented dev %u", dev_instance);
141 VNET_HW_INTERFACE_CLASS (vxlan_hw_class) = {
143 .format_header = format_vxlan_header_with_length,
144 .build_rewrite = default_build_rewrite,
149 vxlan_tunnel_restack_dpo (vxlan_tunnel_t * t)
151 u8 is_ip4 = ip46_address_is_ip4 (&t->dst);
152 dpo_id_t dpo = DPO_INVALID;
153 fib_forward_chain_type_t forw_type = is_ip4 ?
154 FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6;
156 fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo);
158 /* vxlan uses the payload hash as the udp source port
159 * hence the packet's hash is unknown
160 * skip single bucket load balance dpo's */
161 while (DPO_LOAD_BALANCE == dpo.dpoi_type)
163 const load_balance_t *lb;
164 const dpo_id_t *choice;
166 lb = load_balance_get (dpo.dpoi_index);
167 if (lb->lb_n_buckets > 1)
170 choice = load_balance_get_bucket_i (lb, 0);
172 if (DPO_RECEIVE == choice->dpoi_type)
173 dpo_copy (&dpo, drop_dpo_get (choice->dpoi_proto));
175 dpo_copy (&dpo, choice);
178 u32 encap_index = is_ip4 ?
179 vxlan4_encap_node.index : vxlan6_encap_node.index;
180 dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
184 static vxlan_tunnel_t *
185 vxlan_tunnel_from_fib_node (fib_node_t * node)
187 ASSERT (FIB_NODE_TYPE_VXLAN_TUNNEL == node->fn_type);
188 return ((vxlan_tunnel_t *) (((char *) node) -
189 STRUCT_OFFSET_OF (vxlan_tunnel_t, node)));
193 * Function definition to backwalk a FIB node -
194 * Here we will restack the new dpo of VXLAN DIP to encap node.
196 static fib_node_back_walk_rc_t
197 vxlan_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
199 vxlan_tunnel_restack_dpo (vxlan_tunnel_from_fib_node (node));
200 return (FIB_NODE_BACK_WALK_CONTINUE);
204 * Function definition to get a FIB node from its index
207 vxlan_tunnel_fib_node_get (fib_node_index_t index)
210 vxlan_main_t *vxm = &vxlan_main;
212 t = pool_elt_at_index (vxm->tunnels, index);
218 * Function definition to inform the FIB node that its last lock has gone.
221 vxlan_tunnel_last_lock_gone (fib_node_t * node)
224 * The VXLAN tunnel is a root of the graph. As such
225 * it never has children and thus is never locked.
231 * Virtual function table registered by VXLAN tunnels
232 * for participation in the FIB object graph.
234 const static fib_node_vft_t vxlan_vft = {
235 .fnv_get = vxlan_tunnel_fib_node_get,
236 .fnv_last_lock = vxlan_tunnel_last_lock_gone,
237 .fnv_back_walk = vxlan_tunnel_back_walk,
240 #define foreach_copy_field \
242 _ (mcast_sw_if_index) \
243 _ (encap_fib_index) \
244 _ (decap_next_index) \
251 vxlan_rewrite (vxlan_tunnel_t * t, bool is_ip6)
255 ip4_vxlan_header_t h4;
256 ip6_vxlan_header_t h6;
258 int len = is_ip6 ? sizeof h.h6 : sizeof h.h4;
261 vxlan_header_t *vxlan;
262 /* Fixed portion of the (outer) ip header */
264 clib_memset (&h, 0, sizeof (h));
267 ip4_header_t *ip = &h.h4.ip4;
268 udp = &h.h4.udp, vxlan = &h.h4.vxlan;
269 ip->ip_version_and_header_length = 0x45;
271 ip->protocol = IP_PROTOCOL_UDP;
273 ip->src_address = t->src.ip4;
274 ip->dst_address = t->dst.ip4;
276 /* we fix up the ip4 header length and checksum after-the-fact */
277 ip->checksum = ip4_header_checksum (ip);
281 ip6_header_t *ip = &h.h6.ip6;
282 udp = &h.h6.udp, vxlan = &h.h6.vxlan;
283 ip->ip_version_traffic_class_and_flow_label =
284 clib_host_to_net_u32 (6 << 28);
286 ip->protocol = IP_PROTOCOL_UDP;
288 ip->src_address = t->src.ip6;
289 ip->dst_address = t->dst.ip6;
292 /* UDP header, randomize src port on something, maybe? */
293 udp->src_port = clib_host_to_net_u16 (t->src_port);
294 udp->dst_port = clib_host_to_net_u16 (t->dst_port);
297 vnet_set_vni_and_flags (vxlan, t->vni);
298 vnet_rewrite_set_data (*t, &h, len);
302 vxlan_decap_next_is_valid (vxlan_main_t * vxm, u32 is_ip6,
303 u32 decap_next_index)
305 vlib_main_t *vm = vxm->vlib_main;
306 u32 input_idx = (!is_ip6) ?
307 vxlan4_input_node.index : vxlan6_input_node.index;
308 vlib_node_runtime_t *r = vlib_node_get_runtime (vm, input_idx);
310 return decap_next_index < r->n_next_nodes;
314 typedef CLIB_PACKED(union
318 fib_node_index_t mfib_entry_index;
319 adj_index_t mcast_adj_index;
325 static inline mcast_shared_t
326 mcast_shared_get (ip46_address_t * ip)
328 ASSERT (ip46_address_is_multicast (ip));
329 uword *p = hash_get_mem (vxlan_main.mcast_shared, ip);
331 mcast_shared_t ret = {.as_u64 = *p };
336 mcast_shared_add (ip46_address_t * dst, fib_node_index_t mfei, adj_index_t ai)
338 mcast_shared_t new_ep = {
339 .mcast_adj_index = ai,
340 .mfib_entry_index = mfei,
343 hash_set_mem_alloc (&vxlan_main.mcast_shared, dst, new_ep.as_u64);
347 mcast_shared_remove (ip46_address_t * dst)
349 mcast_shared_t ep = mcast_shared_get (dst);
351 adj_unlock (ep.mcast_adj_index);
352 mfib_table_entry_delete_index (ep.mfib_entry_index, MFIB_SOURCE_VXLAN);
354 hash_unset_mem_free (&vxlan_main.mcast_shared, dst);
357 int vnet_vxlan_add_del_tunnel
358 (vnet_vxlan_add_del_tunnel_args_t * a, u32 * sw_if_indexp)
360 vxlan_main_t *vxm = &vxlan_main;
361 vnet_main_t *vnm = vxm->vnet_main;
362 vxlan_decap_info_t *p;
363 u32 sw_if_index = ~0;
364 vxlan4_tunnel_key_t key4;
365 vxlan6_tunnel_key_t key6;
366 u32 is_ip6 = a->is_ip6;
367 vlib_main_t *vm = vlib_get_main ();
371 if (a->src_port == 0)
372 a->src_port = is_ip6 ? UDP_DST_PORT_vxlan6 : UDP_DST_PORT_vxlan;
374 if (a->dst_port == 0)
375 a->dst_port = is_ip6 ? UDP_DST_PORT_vxlan6 : UDP_DST_PORT_vxlan;
380 /* ip4 mcast is indexed by mcast addr only */
381 key4.key[0] = ip46_address_is_multicast (&a->dst) ?
383 a->dst.ip4.as_u32 | (((u64) a->src.ip4.as_u32) << 32);
384 key4.key[1] = ((u64) clib_host_to_net_u16 (a->src_port) << 48) |
385 (((u64) a->encap_fib_index) << 32) |
386 clib_host_to_net_u32 (a->vni << 8);
388 clib_bihash_search_inline_16_8 (&vxm->vxlan4_tunnel_by_key, &key4);
389 p = (void *) &key4.value;
393 key6.key[0] = a->dst.ip6.as_u64[0];
394 key6.key[1] = a->dst.ip6.as_u64[1];
395 key6.key[2] = (((u64) clib_host_to_net_u16 (a->src_port) << 48) |
396 ((u64) a->encap_fib_index) << 32) |
397 clib_host_to_net_u32 (a->vni << 8);
399 clib_bihash_search_inline_24_8 (&vxm->vxlan6_tunnel_by_key, &key6);
400 p = (void *) &key6.value;
408 l2input_main_t *l2im = &l2input_main;
409 u32 dev_instance; /* real dev instance tunnel index */
410 u32 user_instance; /* request and actual instance number */
412 /* adding a tunnel: tunnel must not already exist */
414 return VNET_API_ERROR_TUNNEL_EXIST;
416 /*if not set explicitly, default to l2 */
417 if (a->decap_next_index == ~0)
418 a->decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
419 if (!vxlan_decap_next_is_valid (vxm, is_ip6, a->decap_next_index))
420 return VNET_API_ERROR_INVALID_DECAP_NEXT;
423 pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES);
424 clib_memset (t, 0, sizeof (*t));
425 dev_instance = t - vxm->tunnels;
427 /* copy from arg structure */
428 #define _(x) t->x = a->x;
432 vxlan_rewrite (t, is_ip6);
434 * Reconcile the real dev_instance and a possible requested instance.
436 user_instance = a->instance;
437 if (user_instance == ~0)
438 user_instance = dev_instance;
439 if (hash_get (vxm->instance_used, user_instance))
441 pool_put (vxm->tunnels, t);
442 return VNET_API_ERROR_INSTANCE_IN_USE;
445 hash_set (vxm->instance_used, user_instance, 1);
447 t->dev_instance = dev_instance; /* actual */
448 t->user_instance = user_instance; /* name */
453 vnet_register_interface (vnm, vxlan_device_class.index, dev_instance,
454 vxlan_hw_class.index, dev_instance);
457 f64 now = vlib_time_now (vm);
459 rnd = (u32) (now * 1e6);
460 rnd = random_u32 (&rnd);
461 memcpy (hw_addr + 2, &rnd, sizeof (rnd));
464 if (ethernet_register_interface (
465 vnm, vxlan_device_class.index, dev_instance, hw_addr,
466 &t->hw_if_index, vxlan_eth_flag_change))
468 hash_unset (vxm->instance_used, t->user_instance);
470 pool_put (vxm->tunnels, t);
471 return VNET_API_ERROR_SYSCALL_ERROR_2;
475 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, t->hw_if_index);
477 /* Set vxlan tunnel output node */
478 u32 encap_index = !is_ip6 ?
479 vxlan4_encap_node.index : vxlan6_encap_node.index;
480 vnet_set_interface_output_node (vnm, t->hw_if_index, encap_index);
482 t->sw_if_index = sw_if_index = hi->sw_if_index;
488 key6.value = (u64) dev_instance;
489 add_failed = clib_bihash_add_del_24_8 (&vxm->vxlan6_tunnel_by_key,
494 vxlan_decap_info_t di = {.sw_if_index = t->sw_if_index, };
495 if (ip46_address_is_multicast (&t->dst))
496 di.local_ip = t->src.ip4;
498 di.next_index = t->decap_next_index;
499 key4.value = di.as_u64;
500 add_failed = clib_bihash_add_del_16_8 (&vxm->vxlan4_tunnel_by_key,
507 vnet_delete_hw_interface (vnm, t->hw_if_index);
509 ethernet_delete_interface (vnm, t->hw_if_index);
510 hash_unset (vxm->instance_used, t->user_instance);
511 pool_put (vxm->tunnels, t);
512 return VNET_API_ERROR_INVALID_REGISTRATION;
515 vec_validate_init_empty (vxm->tunnel_index_by_sw_if_index, sw_if_index,
517 vxm->tunnel_index_by_sw_if_index[sw_if_index] = dev_instance;
519 /* setup l2 input config with l2 feature and bd 0 to drop packet */
520 vec_validate (l2im->configs, sw_if_index);
521 l2im->configs[sw_if_index].feature_bitmap = L2INPUT_FEAT_DROP;
522 l2im->configs[sw_if_index].bd_index = 0;
524 vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
525 si->flags &= ~VNET_SW_INTERFACE_FLAG_HIDDEN;
526 vnet_sw_interface_set_flags (vnm, sw_if_index,
527 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
529 fib_node_init (&t->node, FIB_NODE_TYPE_VXLAN_TUNNEL);
530 fib_prefix_t tun_dst_pfx;
531 vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL;
533 fib_prefix_from_ip46_addr (&t->dst, &tun_dst_pfx);
534 if (!ip46_address_is_multicast (&t->dst))
537 * source the FIB entry for the tunnel's destination
538 * and become a child thereof. The tunnel will then get poked
539 * when the forwarding for the entry updates, and the tunnel can
540 * re-stack accordingly
542 vtep_addr_ref (&vxm->vtep_table, t->encap_fib_index, &t->src);
543 t->fib_entry_index = fib_entry_track (t->encap_fib_index,
545 FIB_NODE_TYPE_VXLAN_TUNNEL,
548 vxlan_tunnel_restack_dpo (t);
552 /* Multicast tunnel -
553 * as the same mcast group can be used for multiple mcast tunnels
554 * with different VNIs, create the output fib adjacency only if
555 * it does not already exist
557 fib_protocol_t fp = fib_ip_proto (is_ip6);
559 if (vtep_addr_ref (&vxm->vtep_table,
560 t->encap_fib_index, &t->dst) == 1)
562 fib_node_index_t mfei;
564 fib_route_path_t path = {
565 .frp_proto = fib_proto_to_dpo (fp),
566 .frp_addr = zero_addr,
567 .frp_sw_if_index = 0xffffffff,
570 .frp_flags = FIB_ROUTE_PATH_LOCAL,
571 .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD,
573 const mfib_prefix_t mpfx = {
575 .fp_len = (is_ip6 ? 128 : 32),
576 .fp_grp_addr = tun_dst_pfx.fp_addr,
580 * Setup the (*,G) to receive traffic on the mcast group
581 * - the forwarding interface is for-us
582 * - the accepting interface is that from the API
584 mfib_table_entry_path_update (t->encap_fib_index,
585 &mpfx, MFIB_SOURCE_VXLAN, &path);
587 path.frp_sw_if_index = a->mcast_sw_if_index;
588 path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE;
589 path.frp_mitf_flags = MFIB_ITF_FLAG_ACCEPT;
590 mfei = mfib_table_entry_path_update (t->encap_fib_index,
592 MFIB_SOURCE_VXLAN, &path);
595 * Create the mcast adjacency to send traffic to the group
597 ai = adj_mcast_add_or_lock (fp,
598 fib_proto_to_link (fp),
599 a->mcast_sw_if_index);
602 * create a new end-point
604 mcast_shared_add (&t->dst, mfei, ai);
607 dpo_id_t dpo = DPO_INVALID;
608 mcast_shared_t ep = mcast_shared_get (&t->dst);
610 /* Stack shared mcast dst mac addr rewrite on encap */
611 dpo_set (&dpo, DPO_ADJACENCY_MCAST,
612 fib_proto_to_dpo (fp), ep.mcast_adj_index);
614 dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
616 flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER;
619 vnet_get_sw_interface (vnet_get_main (), sw_if_index)->flood_class =
624 /* deleting a tunnel: tunnel must exist */
626 return VNET_API_ERROR_NO_SUCH_ENTRY;
628 u32 instance = is_ip6 ? key6.value :
629 vxm->tunnel_index_by_sw_if_index[p->sw_if_index];
630 vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, instance);
632 sw_if_index = t->sw_if_index;
633 vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
635 vxm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
638 clib_bihash_add_del_16_8 (&vxm->vxlan4_tunnel_by_key, &key4,
641 clib_bihash_add_del_24_8 (&vxm->vxlan6_tunnel_by_key, &key6,
644 if (!ip46_address_is_multicast (&t->dst))
646 if (t->flow_index != ~0)
647 vnet_flow_del (vnm, t->flow_index);
649 vtep_addr_unref (&vxm->vtep_table, t->encap_fib_index, &t->src);
650 fib_entry_untrack (t->fib_entry_index, t->sibling_index);
652 else if (vtep_addr_unref (&vxm->vtep_table,
653 t->encap_fib_index, &t->dst) == 0)
655 mcast_shared_remove (&t->dst);
658 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, t->hw_if_index);
659 if (hw->dev_class_index == vxlan_device_class.index)
660 vnet_delete_hw_interface (vnm, t->hw_if_index);
662 ethernet_delete_interface (vnm, t->hw_if_index);
663 hash_unset (vxm->instance_used, t->user_instance);
665 fib_node_deinit (&t->node);
666 pool_put (vxm->tunnels, t);
670 *sw_if_indexp = sw_if_index;
674 /* register udp ports */
675 if (!is_ip6 && !udp_is_valid_dst_port (a->src_port, 1))
676 udp_register_dst_port (vxm->vlib_main, a->src_port,
677 vxlan4_input_node.index, 1);
678 if (is_ip6 && !udp_is_valid_dst_port (a->src_port, 0))
679 udp_register_dst_port (vxm->vlib_main, a->src_port,
680 vxlan6_input_node.index, 0);
687 get_decap_next_for_node (u32 node_index, u32 ipv4_set)
689 vxlan_main_t *vxm = &vxlan_main;
690 vlib_main_t *vm = vxm->vlib_main;
691 uword input_node = (ipv4_set) ? vxlan4_input_node.index :
692 vxlan6_input_node.index;
694 return vlib_node_add_next (vm, input_node, node_index);
698 unformat_decap_next (unformat_input_t * input, va_list * args)
700 u32 *result = va_arg (*args, u32 *);
701 u32 ipv4_set = va_arg (*args, int);
702 vxlan_main_t *vxm = &vxlan_main;
703 vlib_main_t *vm = vxm->vlib_main;
707 if (unformat (input, "l2"))
708 *result = VXLAN_INPUT_NEXT_L2_INPUT;
709 else if (unformat (input, "node %U", unformat_vlib_node, vm, &node_index))
710 *result = get_decap_next_for_node (node_index, ipv4_set);
711 else if (unformat (input, "%d", &tmp))
718 static clib_error_t *
719 vxlan_add_del_tunnel_command_fn (vlib_main_t * vm,
720 unformat_input_t * input,
721 vlib_cli_command_t * cmd)
723 unformat_input_t _line_input, *line_input = &_line_input;
724 ip46_address_t src = ip46_address_initializer, dst =
725 ip46_address_initializer;
734 u32 encap_fib_index = 0;
735 u32 mcast_sw_if_index = ~0;
736 u32 decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
741 clib_error_t *parse_error = NULL;
743 /* Get a line of input. */
744 if (!unformat_user (input, unformat_line_input, line_input))
747 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
749 if (unformat (line_input, "del"))
753 else if (unformat (line_input, "instance %d", &instance))
755 else if (unformat (line_input, "src %U",
756 unformat_ip46_address, &src, IP46_TYPE_ANY))
759 ip46_address_is_ip4 (&src) ? (ipv4_set = 1) : (ipv6_set = 1);
761 else if (unformat (line_input, "dst %U",
762 unformat_ip46_address, &dst, IP46_TYPE_ANY))
765 ip46_address_is_ip4 (&dst) ? (ipv4_set = 1) : (ipv6_set = 1);
767 else if (unformat (line_input, "group %U %U",
768 unformat_ip46_address, &dst, IP46_TYPE_ANY,
769 unformat_vnet_sw_interface,
770 vnet_get_main (), &mcast_sw_if_index))
772 grp_set = dst_set = 1;
773 ip46_address_is_ip4 (&dst) ? (ipv4_set = 1) : (ipv6_set = 1);
775 else if (unformat (line_input, "encap-vrf-id %d", &table_id))
778 fib_table_find (fib_ip_proto (ipv6_set), table_id);
780 else if (unformat (line_input, "l3"))
782 else if (unformat (line_input, "decap-next %U", unformat_decap_next,
783 &decap_next_index, ipv4_set))
785 else if (unformat (line_input, "vni %d", &vni))
787 else if (unformat (line_input, "src_port %d", &src_port))
789 else if (unformat (line_input, "dst_port %d", &dst_port))
793 parse_error = clib_error_return (0, "parse error: '%U'",
794 format_unformat_error, line_input);
799 unformat_free (line_input);
804 if (is_l3 && decap_next_index == VXLAN_INPUT_NEXT_L2_INPUT)
806 vlib_node_t *node = vlib_get_node_by_name (
807 vm, (u8 *) (ipv4_set ? "ip4-input" : "ip6-input"));
808 decap_next_index = get_decap_next_for_node (node->index, ipv4_set);
811 if (encap_fib_index == ~0)
812 return clib_error_return (0, "nonexistent encap-vrf-id %d", table_id);
815 return clib_error_return (0, "tunnel src address not specified");
818 return clib_error_return (0, "tunnel dst address not specified");
820 if (grp_set && !ip46_address_is_multicast (&dst))
821 return clib_error_return (0, "tunnel group address not multicast");
823 if (grp_set == 0 && ip46_address_is_multicast (&dst))
824 return clib_error_return (0, "dst address must be unicast");
826 if (grp_set && mcast_sw_if_index == ~0)
827 return clib_error_return (0, "tunnel nonexistent multicast device");
829 if (ipv4_set && ipv6_set)
830 return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
832 if (ip46_address_cmp (&src, &dst) == 0)
833 return clib_error_return (0, "src and dst addresses are identical");
835 if (decap_next_index == ~0)
836 return clib_error_return (0, "next node not found");
839 return clib_error_return (0, "vni not specified");
842 return clib_error_return (0, "vni %d out of range", vni);
844 vnet_vxlan_add_del_tunnel_args_t a = { .is_add = is_add,
847 .instance = instance,
853 u32 tunnel_sw_if_index;
854 int rv = vnet_vxlan_add_del_tunnel (&a, &tunnel_sw_if_index);
860 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name,
861 vnet_get_main (), tunnel_sw_if_index);
864 case VNET_API_ERROR_TUNNEL_EXIST:
865 return clib_error_return (0, "tunnel already exists...");
867 case VNET_API_ERROR_NO_SUCH_ENTRY:
868 return clib_error_return (0, "tunnel does not exist...");
870 case VNET_API_ERROR_INSTANCE_IN_USE:
871 return clib_error_return (0, "Instance is in use");
874 return clib_error_return
875 (0, "vnet_vxlan_add_del_tunnel returned %d", rv);
882 * Add or delete a VXLAN Tunnel.
884 * VXLAN provides the features needed to allow L2 bridge domains (BDs)
885 * to span multiple servers. This is done by building an L2 overlay on
886 * top of an L3 network underlay using VXLAN tunnels.
888 * This makes it possible for servers to be co-located in the same data
889 * center or be separated geographically as long as they are reachable
890 * through the underlay L3 network.
892 * You can refer to this kind of L2 overlay bridge domain as a VXLAN
893 * (Virtual eXtensible VLAN) segment.
896 * Example of how to create a VXLAN Tunnel:
897 * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 encap-vrf-id
899 * Example of how to create a VXLAN Tunnel with a known name, vxlan_tunnel42:
900 * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 instance 42}
901 * Example of how to create a multicast VXLAN Tunnel with a known name,
903 * @cliexcmd{create vxlan tunnel src 10.0.3.1 group 239.1.1.1
904 GigabitEthernet0/8/0 instance 23}
905 * Example of how to create a VXLAN Tunnel with custom udp-ports:
906 * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 src_port
907 59000 dst_port 59001}
908 * Example of how to delete a VXLAN Tunnel:
909 * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 del}
912 VLIB_CLI_COMMAND (create_vxlan_tunnel_command, static) = {
913 .path = "create vxlan tunnel",
915 "create vxlan tunnel src <local-vtep-addr>"
916 " {dst <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} vni <nn>"
918 " [encap-vrf-id <nn>] [decap-next [l2|node <name>]] [del] [l3]"
919 " [src_port <local-vtep-udp-port>] [dst_port <remote-vtep-udp-port>]",
920 .function = vxlan_add_del_tunnel_command_fn,
924 static clib_error_t *
925 show_vxlan_tunnel_command_fn (vlib_main_t * vm,
926 unformat_input_t * input,
927 vlib_cli_command_t * cmd)
929 vxlan_main_t *vxm = &vxlan_main;
933 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
935 if (unformat (input, "raw"))
938 return clib_error_return (0, "parse error: '%U'",
939 format_unformat_error, input);
942 if (pool_elts (vxm->tunnels) == 0)
943 vlib_cli_output (vm, "No vxlan tunnels configured...");
946 pool_foreach (t, vxm->tunnels)
948 vlib_cli_output (vm, "%U", format_vxlan_tunnel, t);
954 vlib_cli_output (vm, "Raw IPv4 Hash Table:\n%U\n",
955 format_bihash_16_8, &vxm->vxlan4_tunnel_by_key,
957 vlib_cli_output (vm, "Raw IPv6 Hash Table:\n%U\n",
958 format_bihash_24_8, &vxm->vxlan6_tunnel_by_key,
966 * Display all the VXLAN Tunnel entries.
969 * Example of how to display the VXLAN Tunnel entries:
970 * @cliexstart{show vxlan tunnel}
971 * [0] src 10.0.3.1 dst 10.0.3.3 src_port 4789 dst_port 4789 vni 13
972 encap_fib_index 0 sw_if_index 5 decap_next l2
976 VLIB_CLI_COMMAND (show_vxlan_tunnel_command, static) = {
977 .path = "show vxlan tunnel",
978 .short_help = "show vxlan tunnel [raw]",
979 .function = show_vxlan_tunnel_command_fn,
985 vnet_int_vxlan_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable)
987 vxlan_main_t *vxm = &vxlan_main;
989 if (pool_is_free_index (vxm->vnet_main->interface_main.sw_interfaces,
993 is_enable = ! !is_enable;
997 if (clib_bitmap_get (vxm->bm_ip6_bypass_enabled_by_sw_if, sw_if_index)
1000 vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-bypass",
1001 sw_if_index, is_enable, 0, 0);
1002 vxm->bm_ip6_bypass_enabled_by_sw_if =
1003 clib_bitmap_set (vxm->bm_ip6_bypass_enabled_by_sw_if,
1004 sw_if_index, is_enable);
1009 if (clib_bitmap_get (vxm->bm_ip4_bypass_enabled_by_sw_if, sw_if_index)
1012 vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass",
1013 sw_if_index, is_enable, 0, 0);
1014 vxm->bm_ip4_bypass_enabled_by_sw_if =
1015 clib_bitmap_set (vxm->bm_ip4_bypass_enabled_by_sw_if,
1016 sw_if_index, is_enable);
1022 static clib_error_t *
1023 set_ip_vxlan_bypass (u32 is_ip6,
1024 unformat_input_t * input, vlib_cli_command_t * cmd)
1026 unformat_input_t _line_input, *line_input = &_line_input;
1027 vnet_main_t *vnm = vnet_get_main ();
1028 clib_error_t *error = 0;
1029 u32 sw_if_index, is_enable;
1034 if (!unformat_user (input, unformat_line_input, line_input))
1037 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1040 (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
1042 else if (unformat (line_input, "del"))
1046 error = unformat_parse_error (line_input);
1051 if (~0 == sw_if_index)
1053 error = clib_error_return (0, "unknown interface `%U'",
1054 format_unformat_error, line_input);
1058 vnet_int_vxlan_bypass_mode (sw_if_index, is_ip6, is_enable);
1061 unformat_free (line_input);
1066 static clib_error_t *
1067 set_ip4_vxlan_bypass (vlib_main_t * vm,
1068 unformat_input_t * input, vlib_cli_command_t * cmd)
1070 return set_ip_vxlan_bypass (0, input, cmd);
1074 * This command adds the 'ip4-vxlan-bypass' graph node for a given interface.
1075 * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks
1076 * for and validate input vxlan packet and bypass ip4-lookup, ip4-local,
1077 * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will
1078 * cause extra overhead to for non-vxlan packets which is kept at a minimum.
1082 * Example of graph node before ip4-vxlan-bypass is enabled:
1083 * @cliexstart{show vlib graph ip4-vxlan-bypass}
1084 * Name Next Previous
1085 * ip4-vxlan-bypass error-drop [0]
1090 * Example of how to enable ip4-vxlan-bypass on an interface:
1091 * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0}
1093 * Example of graph node after ip4-vxlan-bypass is enabled:
1094 * @cliexstart{show vlib graph ip4-vxlan-bypass}
1095 * Name Next Previous
1096 * ip4-vxlan-bypass error-drop [0] ip4-input
1097 * vxlan4-input [1] ip4-input-no-checksum
1101 * Example of how to display the feature enabled on an interface:
1102 * @cliexstart{show ip interface features GigabitEthernet2/0/0}
1103 * IP feature paths configured on GigabitEthernet2/0/0...
1111 * Example of how to disable ip4-vxlan-bypass on an interface:
1112 * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del}
1116 VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = {
1117 .path = "set interface ip vxlan-bypass",
1118 .function = set_ip4_vxlan_bypass,
1119 .short_help = "set interface ip vxlan-bypass <interface> [del]",
1123 static clib_error_t *
1124 set_ip6_vxlan_bypass (vlib_main_t * vm,
1125 unformat_input_t * input, vlib_cli_command_t * cmd)
1127 return set_ip_vxlan_bypass (1, input, cmd);
1131 * This command adds the 'ip6-vxlan-bypass' graph node for a given interface.
1132 * By adding the IPv6 vxlan-bypass graph node to an interface, the node checks
1133 * for and validate input vxlan packet and bypass ip6-lookup, ip6-local,
1134 * ip6-udp-lookup nodes to speedup vxlan packet forwarding. This node will
1135 * cause extra overhead to for non-vxlan packets which is kept at a minimum.
1139 * Example of graph node before ip6-vxlan-bypass is enabled:
1140 * @cliexstart{show vlib graph ip6-vxlan-bypass}
1141 * Name Next Previous
1142 * ip6-vxlan-bypass error-drop [0]
1147 * Example of how to enable ip6-vxlan-bypass on an interface:
1148 * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0}
1150 * Example of graph node after ip6-vxlan-bypass is enabled:
1151 * @cliexstart{show vlib graph ip6-vxlan-bypass}
1152 * Name Next Previous
1153 * ip6-vxlan-bypass error-drop [0] ip6-input
1154 * vxlan6-input [1] ip4-input-no-checksum
1158 * Example of how to display the feature enabled on an interface:
1159 * @cliexstart{show ip interface features GigabitEthernet2/0/0}
1160 * IP feature paths configured on GigabitEthernet2/0/0...
1168 * Example of how to disable ip6-vxlan-bypass on an interface:
1169 * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0 del}
1173 VLIB_CLI_COMMAND (set_interface_ip6_vxlan_bypass_command, static) = {
1174 .path = "set interface ip6 vxlan-bypass",
1175 .function = set_ip6_vxlan_bypass,
1176 .short_help = "set interface ip6 vxlan-bypass <interface> [del]",
1181 vnet_vxlan_add_del_rx_flow (u32 hw_if_index, u32 t_index, int is_add)
1183 vxlan_main_t *vxm = &vxlan_main;
1184 vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, t_index);
1185 vnet_main_t *vnm = vnet_get_main ();
1188 if (t->flow_index == ~0)
1190 vxlan_main_t *vxm = &vxlan_main;
1191 vnet_flow_t flow = {
1193 VNET_FLOW_ACTION_REDIRECT_TO_NODE | VNET_FLOW_ACTION_MARK |
1194 VNET_FLOW_ACTION_BUFFER_ADVANCE,
1195 .mark_flow_id = t->dev_instance + vxm->flow_id_start,
1196 .redirect_node_index = vxlan4_flow_input_node.index,
1197 .buffer_advance = sizeof (ethernet_header_t),
1198 .type = VNET_FLOW_TYPE_IP4_VXLAN,
1200 .protocol.prot = IP_PROTOCOL_UDP,
1201 .src_addr.addr = t->dst.ip4,
1202 .dst_addr.addr = t->src.ip4,
1203 .src_addr.mask.as_u32 = ~0,
1204 .dst_addr.mask.as_u32 = ~0,
1205 .dst_port.port = t->src_port,
1206 .dst_port.mask = 0xFF,
1211 vnet_flow_add (vnm, &flow, &t->flow_index);
1213 return vnet_flow_enable (vnm, t->flow_index, hw_if_index);
1215 /* flow index is removed when the tunnel is deleted */
1216 return vnet_flow_disable (vnm, t->flow_index, hw_if_index);
1220 vnet_vxlan_get_tunnel_index (u32 sw_if_index)
1222 vxlan_main_t *vxm = &vxlan_main;
1224 if (sw_if_index >= vec_len (vxm->tunnel_index_by_sw_if_index))
1226 return vxm->tunnel_index_by_sw_if_index[sw_if_index];
1229 static clib_error_t *
1230 vxlan_offload_command_fn (vlib_main_t * vm,
1231 unformat_input_t * input, vlib_cli_command_t * cmd)
1233 unformat_input_t _line_input, *line_input = &_line_input;
1235 /* Get a line of input. */
1236 if (!unformat_user (input, unformat_line_input, line_input))
1239 vnet_main_t *vnm = vnet_get_main ();
1240 u32 rx_sw_if_index = ~0;
1241 u32 hw_if_index = ~0;
1244 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1246 if (unformat (line_input, "hw %U", unformat_vnet_hw_interface, vnm,
1249 if (unformat (line_input, "rx %U", unformat_vnet_sw_interface, vnm,
1252 if (unformat (line_input, "del"))
1257 return clib_error_return (0, "unknown input `%U'",
1258 format_unformat_error, line_input);
1261 if (rx_sw_if_index == ~0)
1262 return clib_error_return (0, "missing rx interface");
1263 if (hw_if_index == ~0)
1264 return clib_error_return (0, "missing hw interface");
1266 u32 t_index = vnet_vxlan_get_tunnel_index (rx_sw_if_index);;
1268 return clib_error_return (0, "%U is not a vxlan tunnel",
1269 format_vnet_sw_if_index_name, vnm,
1272 vxlan_main_t *vxm = &vxlan_main;
1273 vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, t_index);
1275 if (!ip46_address_is_ip4 (&t->dst))
1276 return clib_error_return (0, "currently only IPV4 tunnels are supported");
1278 vnet_hw_interface_t *hw_if = vnet_get_hw_interface (vnm, hw_if_index);
1279 ip4_main_t *im = &ip4_main;
1281 vec_elt (im->fib_index_by_sw_if_index, hw_if->sw_if_index);
1283 if (t->encap_fib_index != rx_fib_index)
1284 return clib_error_return (0, "interface/tunnel fib mismatch");
1286 if (vnet_vxlan_add_del_rx_flow (hw_if_index, t_index, is_add))
1287 return clib_error_return (0, "error %s flow",
1288 is_add ? "enabling" : "disabling");
1294 VLIB_CLI_COMMAND (vxlan_offload_command, static) = {
1295 .path = "set flow-offload vxlan",
1297 "set flow-offload vxlan hw <interface-name> rx <tunnel-name> [del]",
1298 .function = vxlan_offload_command_fn,
1302 #define VXLAN_HASH_NUM_BUCKETS (2 * 1024)
1303 #define VXLAN_HASH_MEMORY_SIZE (1 << 20)
1306 vxlan_init (vlib_main_t * vm)
1308 vxlan_main_t *vxm = &vxlan_main;
1310 vxm->vnet_main = vnet_get_main ();
1311 vxm->vlib_main = vm;
1313 vnet_flow_get_range (vxm->vnet_main, "vxlan", 1024 * 1024,
1314 &vxm->flow_id_start);
1316 vxm->bm_ip4_bypass_enabled_by_sw_if = 0;
1317 vxm->bm_ip6_bypass_enabled_by_sw_if = 0;
1319 /* initialize the ip6 hash */
1320 clib_bihash_init_16_8 (&vxm->vxlan4_tunnel_by_key, "vxlan4",
1321 VXLAN_HASH_NUM_BUCKETS, VXLAN_HASH_MEMORY_SIZE);
1322 clib_bihash_init_24_8 (&vxm->vxlan6_tunnel_by_key, "vxlan6",
1323 VXLAN_HASH_NUM_BUCKETS, VXLAN_HASH_MEMORY_SIZE);
1324 vxm->vtep_table = vtep_table_create ();
1325 vxm->mcast_shared = hash_create_mem (0,
1326 sizeof (ip46_address_t),
1327 sizeof (mcast_shared_t));
1329 fib_node_register_type (FIB_NODE_TYPE_VXLAN_TUNNEL, &vxlan_vft);
1334 VLIB_INIT_FUNCTION (vxlan_init);
1337 * fd.io coding-style-patch-verification: ON
1340 * eval: (c-set-style "gnu")