2 * Copyright (c) 2016 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.
17 #include <vnet/plugin/plugin.h>
18 #include <vpp/app/version.h>
19 #include <vnet/api_errno.h>
20 #include <vnet/udp/udp_local.h>
21 #include <vppinfra/lock.h>
23 //GC runs at most once every so many seconds
24 #define LB_GARBAGE_RUN 60
26 //After so many seconds. It is assumed that inter-core race condition will not occur.
27 #define LB_CONCURRENCY_TIMEOUT 10
29 // FIB source for adding routes
30 static fib_source_t lb_fib_src;
34 #define lb_get_writer_lock() clib_spinlock_lock (&lb_main.writer_lock)
35 #define lb_put_writer_lock() clib_spinlock_unlock (&lb_main.writer_lock)
37 static void lb_as_stack (lb_as_t *as);
40 const static char * const lb_dpo_gre4_ip4[] = { "lb4-gre4" , NULL };
41 const static char * const lb_dpo_gre4_ip6[] = { "lb6-gre4" , NULL };
42 const static char* const * const lb_dpo_gre4_nodes[DPO_PROTO_NUM] =
44 [DPO_PROTO_IP4] = lb_dpo_gre4_ip4,
45 [DPO_PROTO_IP6] = lb_dpo_gre4_ip6,
48 const static char * const lb_dpo_gre6_ip4[] = { "lb4-gre6" , NULL };
49 const static char * const lb_dpo_gre6_ip6[] = { "lb6-gre6" , NULL };
50 const static char* const * const lb_dpo_gre6_nodes[DPO_PROTO_NUM] =
52 [DPO_PROTO_IP4] = lb_dpo_gre6_ip4,
53 [DPO_PROTO_IP6] = lb_dpo_gre6_ip6,
56 const static char * const lb_dpo_gre4_ip4_port[] = { "lb4-gre4-port" , NULL };
57 const static char * const lb_dpo_gre4_ip6_port[] = { "lb6-gre4-port" , NULL };
58 const static char* const * const lb_dpo_gre4_port_nodes[DPO_PROTO_NUM] =
60 [DPO_PROTO_IP4] = lb_dpo_gre4_ip4_port,
61 [DPO_PROTO_IP6] = lb_dpo_gre4_ip6_port,
64 const static char * const lb_dpo_gre6_ip4_port[] = { "lb4-gre6-port" , NULL };
65 const static char * const lb_dpo_gre6_ip6_port[] = { "lb6-gre6-port" , NULL };
66 const static char* const * const lb_dpo_gre6_port_nodes[DPO_PROTO_NUM] =
68 [DPO_PROTO_IP4] = lb_dpo_gre6_ip4_port,
69 [DPO_PROTO_IP6] = lb_dpo_gre6_ip6_port,
72 const static char * const lb_dpo_l3dsr_ip4[] = {"lb4-l3dsr" , NULL};
73 const static char* const * const lb_dpo_l3dsr_nodes[DPO_PROTO_NUM] =
75 [DPO_PROTO_IP4] = lb_dpo_l3dsr_ip4,
78 const static char * const lb_dpo_l3dsr_ip4_port[] = {"lb4-l3dsr-port" , NULL};
79 const static char* const * const lb_dpo_l3dsr_port_nodes[DPO_PROTO_NUM] =
81 [DPO_PROTO_IP4] = lb_dpo_l3dsr_ip4_port,
84 const static char * const lb_dpo_nat4_ip4_port[] = { "lb4-nat4-port" , NULL };
85 const static char* const * const lb_dpo_nat4_port_nodes[DPO_PROTO_NUM] =
87 [DPO_PROTO_IP4] = lb_dpo_nat4_ip4_port,
90 const static char * const lb_dpo_nat6_ip6_port[] = { "lb6-nat6-port" , NULL };
91 const static char* const * const lb_dpo_nat6_port_nodes[DPO_PROTO_NUM] =
93 [DPO_PROTO_IP6] = lb_dpo_nat6_ip6_port,
96 u32 lb_hash_time_now(vlib_main_t * vm)
98 return (u32) (vlib_time_now(vm) + 10000);
101 u8 *format_lb_main (u8 * s, va_list * args)
103 vlib_thread_main_t *tm = vlib_get_thread_main();
104 lb_main_t *lbm = &lb_main;
105 s = format(s, "lb_main");
106 s = format(s, " ip4-src-address: %U \n", format_ip4_address, &lbm->ip4_src_address);
107 s = format(s, " ip6-src-address: %U \n", format_ip6_address, &lbm->ip6_src_address);
108 s = format(s, " #vips: %u\n", pool_elts(lbm->vips));
109 s = format(s, " #ass: %u\n", pool_elts(lbm->ass) - 1);
112 for(thread_index = 0; thread_index < tm->n_vlib_mains; thread_index++ ) {
113 lb_hash_t *h = lbm->per_cpu[thread_index].sticky_ht;
115 s = format(s, "core %d\n", thread_index);
116 s = format(s, " timeout: %ds\n", h->timeout);
117 s = format(s, " usage: %d / %d\n", lb_hash_elts(h, lb_hash_time_now(vlib_get_main())), lb_hash_size(h));
124 static char *lb_vip_type_strings[] = {
125 [LB_VIP_TYPE_IP6_GRE6] = "ip6-gre6",
126 [LB_VIP_TYPE_IP6_GRE4] = "ip6-gre4",
127 [LB_VIP_TYPE_IP4_GRE6] = "ip4-gre6",
128 [LB_VIP_TYPE_IP4_GRE4] = "ip4-gre4",
129 [LB_VIP_TYPE_IP4_L3DSR] = "ip4-l3dsr",
130 [LB_VIP_TYPE_IP4_NAT4] = "ip4-nat4",
131 [LB_VIP_TYPE_IP6_NAT6] = "ip6-nat6",
134 u8 *format_lb_vip_type (u8 * s, va_list * args)
136 lb_vip_type_t vipt = va_arg (*args, lb_vip_type_t);
138 for (i=0; i<LB_VIP_N_TYPES; i++)
140 return format(s, lb_vip_type_strings[i]);
141 return format(s, "_WRONG_TYPE_");
144 uword unformat_lb_vip_type (unformat_input_t * input, va_list * args)
146 lb_vip_type_t *vipt = va_arg (*args, lb_vip_type_t *);
148 for (i=0; i<LB_VIP_N_TYPES; i++)
149 if (unformat(input, lb_vip_type_strings[i])) {
156 u8 *format_lb_vip (u8 * s, va_list * args)
158 lb_vip_t *vip = va_arg (*args, lb_vip_t *);
159 s = format(s, "%U %U new_size:%u #as:%u%s",
160 format_lb_vip_type, vip->type,
161 format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY,
162 vip->new_flow_table_mask + 1,
163 pool_elts(vip->as_indexes),
164 (vip->flags & LB_VIP_FLAGS_USED)?"":" removed");
168 s = format(s, " protocol:%u port:%u ", vip->protocol, vip->port);
171 if (vip->type == LB_VIP_TYPE_IP4_L3DSR)
173 s = format(s, " dscp:%u", vip->encap_args.dscp);
175 else if ((vip->type == LB_VIP_TYPE_IP4_NAT4)
176 || (vip->type == LB_VIP_TYPE_IP6_NAT6))
178 s = format (s, " type:%s port:%u target_port:%u",
179 (vip->encap_args.srv_type == LB_SRV_TYPE_CLUSTERIP)?"clusterip":
181 ntohs(vip->port), ntohs(vip->encap_args.target_port));
187 u8 *format_lb_as (u8 * s, va_list * args)
189 lb_as_t *as = va_arg (*args, lb_as_t *);
190 return format(s, "%U %s", format_ip46_address,
191 &as->address, IP46_TYPE_ANY,
192 (as->flags & LB_AS_FLAGS_USED)?"used":"removed");
195 u8 *format_lb_vip_detailed (u8 * s, va_list * args)
197 lb_main_t *lbm = &lb_main;
198 lb_vip_t *vip = va_arg (*args, lb_vip_t *);
199 u32 indent = format_get_indent (s);
201 /* clang-format off */
202 s = format(s, "%U %U [%lu] %U%s%s\n"
204 format_white_space, indent,
205 format_lb_vip_type, vip->type,
207 format_ip46_prefix, &vip->prefix, (u32) vip->plen, IP46_TYPE_ANY,
208 lb_vip_is_src_ip_sticky (vip) ? " src_ip_sticky" : "",
209 (vip->flags & LB_VIP_FLAGS_USED)?"":" removed",
210 format_white_space, indent,
211 vip->new_flow_table_mask + 1);
212 /* clang-format on */
216 s = format(s, "%U protocol:%u port:%u\n",
217 format_white_space, indent,
218 vip->protocol, vip->port);
221 if (vip->type == LB_VIP_TYPE_IP4_L3DSR)
223 s = format(s, "%U dscp:%u\n",
224 format_white_space, indent,
225 vip->encap_args.dscp);
227 else if ((vip->type == LB_VIP_TYPE_IP4_NAT4)
228 || (vip->type == LB_VIP_TYPE_IP6_NAT6))
230 s = format (s, "%U type:%s port:%u target_port:%u",
231 format_white_space, indent,
232 (vip->encap_args.srv_type == LB_SRV_TYPE_CLUSTERIP)?"clusterip":
234 ntohs(vip->port), ntohs(vip->encap_args.target_port));
238 s = format(s, "%U counters:\n",
239 format_white_space, indent);
241 for (i=0; i<LB_N_VIP_COUNTERS; i++)
242 s = format(s, "%U %s: %Lu\n",
243 format_white_space, indent,
244 lbm->vip_counters[i].name,
245 vlib_get_simple_counter(&lbm->vip_counters[i], vip - lbm->vips));
248 s = format(s, "%U #as:%u\n",
249 format_white_space, indent,
250 pool_elts(vip->as_indexes));
252 //Let's count the buckets for each AS
254 vec_validate(count, pool_len(lbm->ass)); //Possibly big alloc for not much...
255 lb_new_flow_entry_t *nfe;
256 vec_foreach(nfe, vip->new_flow_table)
257 count[nfe->as_index]++;
261 pool_foreach (as_index, vip->as_indexes) {
262 as = &lbm->ass[*as_index];
263 s = format(s, "%U %U %u buckets %Lu flows dpo:%u %s\n",
264 format_white_space, indent,
265 format_ip46_address, &as->address, IP46_TYPE_ANY,
266 count[as - lbm->ass],
267 vlib_refcount_get(&lbm->as_refcount, as - lbm->ass),
269 (as->flags & LB_AS_FLAGS_USED)?"used":" removed");
282 static int lb_pseudorand_compare(void *a, void *b)
285 lb_main_t *lbm = &lb_main;
286 asa = &lbm->ass[((lb_pseudorand_t *)a)->as_index];
287 asb = &lbm->ass[((lb_pseudorand_t *)b)->as_index];
288 return memcmp(&asa->address, &asb->address, sizeof(asb->address));
291 static void lb_vip_garbage_collection(lb_vip_t *vip)
293 lb_main_t *lbm = &lb_main;
294 lb_snat4_key_t m_key4;
295 clib_bihash_kv_8_8_t kv4, value4;
296 lb_snat6_key_t m_key6;
297 clib_bihash_kv_24_8_t kv6, value6;
298 lb_snat_mapping_t *m = 0;
299 CLIB_SPINLOCK_ASSERT_LOCKED (&lbm->writer_lock);
301 u32 now = (u32) vlib_time_now(vlib_get_main());
302 if (!clib_u32_loop_gt(now, vip->last_garbage_collection + LB_GARBAGE_RUN))
305 vip->last_garbage_collection = now;
308 pool_foreach (as_index, vip->as_indexes) {
309 as = &lbm->ass[*as_index];
310 if (!(as->flags & LB_AS_FLAGS_USED) && //Not used
311 clib_u32_loop_gt(now, as->last_used + LB_CONCURRENCY_TIMEOUT) &&
312 (vlib_refcount_get(&lbm->as_refcount, as - lbm->ass) == 0))
315 if (lb_vip_is_nat4_port(vip)) {
316 m_key4.addr = as->address.ip4;
317 m_key4.port = vip->encap_args.target_port;
319 m_key4.fib_index = 0;
321 kv4.key = m_key4.as_u64;
322 if(!clib_bihash_search_8_8(&lbm->mapping_by_as4, &kv4, &value4))
323 m = pool_elt_at_index (lbm->snat_mappings, value4.value);
326 kv4.value = m - lbm->snat_mappings;
327 clib_bihash_add_del_8_8(&lbm->mapping_by_as4, &kv4, 0);
328 pool_put (lbm->snat_mappings, m);
329 } else if (lb_vip_is_nat6_port(vip)) {
330 m_key6.addr.as_u64[0] = as->address.ip6.as_u64[0];
331 m_key6.addr.as_u64[1] = as->address.ip6.as_u64[1];
332 m_key6.port = vip->encap_args.target_port;
334 m_key6.fib_index = 0;
336 kv6.key[0] = m_key6.as_u64[0];
337 kv6.key[1] = m_key6.as_u64[1];
338 kv6.key[2] = m_key6.as_u64[2];
340 if (!clib_bihash_search_24_8 (&lbm->mapping_by_as6, &kv6, &value6))
341 m = pool_elt_at_index (lbm->snat_mappings, value6.value);
344 kv6.value = m - lbm->snat_mappings;
345 clib_bihash_add_del_24_8(&lbm->mapping_by_as6, &kv6, 0);
346 pool_put (lbm->snat_mappings, m);
348 fib_entry_child_remove(as->next_hop_fib_entry_index,
349 as->next_hop_child_index);
350 fib_table_entry_delete_index(as->next_hop_fib_entry_index,
352 as->next_hop_fib_entry_index = FIB_NODE_INDEX_INVALID;
354 pool_put(vip->as_indexes, as_index);
355 pool_put(lbm->ass, as);
360 void lb_garbage_collection()
362 lb_main_t *lbm = &lb_main;
363 lb_get_writer_lock();
365 u32 *to_be_removed_vips = 0, *i;
366 pool_foreach (vip, lbm->vips) {
367 lb_vip_garbage_collection(vip);
369 if (!(vip->flags & LB_VIP_FLAGS_USED) &&
370 (pool_elts(vip->as_indexes) == 0)) {
371 vec_add1(to_be_removed_vips, vip - lbm->vips);
375 vec_foreach(i, to_be_removed_vips) {
376 vip = &lbm->vips[*i];
377 pool_put(lbm->vips, vip);
378 pool_free(vip->as_indexes);
381 vec_free(to_be_removed_vips);
382 lb_put_writer_lock();
385 static void lb_vip_update_new_flow_table(lb_vip_t *vip)
387 lb_main_t *lbm = &lb_main;
388 lb_new_flow_entry_t *old_table;
390 lb_new_flow_entry_t *new_flow_table = 0;
392 lb_pseudorand_t *pr, *sort_arr = 0;
394 CLIB_SPINLOCK_ASSERT_LOCKED (&lbm->writer_lock); // We must have the lock
396 //Check if some AS is configured or not
398 pool_foreach (as_index, vip->as_indexes) {
399 as = &lbm->ass[*as_index];
400 if (as->flags & LB_AS_FLAGS_USED) { //Not used anymore
402 goto out; //Not sure 'break' works in this macro-loop
408 //Only the default. i.e. no AS
409 vec_validate(new_flow_table, vip->new_flow_table_mask);
410 for (i=0; i<vec_len(new_flow_table); i++)
411 new_flow_table[i].as_index = 0;
416 //First, let's sort the ASs
417 vec_validate (sort_arr, pool_elts (vip->as_indexes) - 1);
420 pool_foreach (as_index, vip->as_indexes) {
421 as = &lbm->ass[*as_index];
422 if (!(as->flags & LB_AS_FLAGS_USED)) //Not used anymore
425 sort_arr[i].as_index = as - lbm->ass;
428 vec_set_len (sort_arr, i);
430 vec_sort_with_function(sort_arr, lb_pseudorand_compare);
432 //Now let's pseudo-randomly generate permutations
433 vec_foreach(pr, sort_arr) {
434 lb_as_t *as = &lbm->ass[pr->as_index];
436 u64 seed = clib_xxhash(as->address.as_u64[0] ^
437 as->address.as_u64[1]);
438 /* We have 2^n buckets.
439 * skip must be prime with 2^n.
440 * So skip must be odd.
441 * MagLev actually state that M should be prime,
442 * but this has a big computation cost (% operation).
443 * Using 2^n is more better (& operation).
445 pr->skip = ((seed & 0xffffffff) | 1) & vip->new_flow_table_mask;
446 pr->last = (seed >> 32) & vip->new_flow_table_mask;
449 //Let's create a new flow table
450 vec_validate(new_flow_table, vip->new_flow_table_mask);
451 for (i=0; i<vec_len(new_flow_table); i++)
452 new_flow_table[i].as_index = 0;
456 vec_foreach(pr, sort_arr) {
459 pr->last = (pr->last + pr->skip) & vip->new_flow_table_mask;
460 if (new_flow_table[last].as_index == 0) {
461 new_flow_table[last].as_index = pr->as_index;
466 if (done == vec_len(new_flow_table))
474 old_table = vip->new_flow_table;
475 vip->new_flow_table = new_flow_table;
479 int lb_conf(ip4_address_t *ip4_address, ip6_address_t *ip6_address,
480 u32 per_cpu_sticky_buckets, u32 flow_timeout)
482 lb_main_t *lbm = &lb_main;
484 if (!is_pow2(per_cpu_sticky_buckets))
485 return VNET_API_ERROR_INVALID_MEMORY_SIZE;
487 lb_get_writer_lock(); //Not exactly necessary but just a reminder that it exists for my future self
488 lbm->ip4_src_address = *ip4_address;
489 lbm->ip6_src_address = *ip6_address;
490 lbm->per_cpu_sticky_buckets = per_cpu_sticky_buckets;
491 lbm->flow_timeout = flow_timeout;
492 lb_put_writer_lock();
499 int lb_vip_port_find_index(ip46_address_t *prefix, u8 plen,
500 u8 protocol, u16 port,
501 lb_lkp_type_t lkp_type,
504 lb_main_t *lbm = &lb_main;
506 /* This must be called with the lock owned */
507 CLIB_SPINLOCK_ASSERT_LOCKED (&lbm->writer_lock);
508 ip46_prefix_normalize(prefix, plen);
509 pool_foreach (vip, lbm->vips) {
510 if ((vip->flags & LB_AS_FLAGS_USED) &&
512 vip->prefix.as_u64[0] == prefix->as_u64[0] &&
513 vip->prefix.as_u64[1] == prefix->as_u64[1])
515 if((lkp_type == LB_LKP_SAME_IP_PORT &&
516 vip->protocol == protocol &&
517 vip->port == port) ||
518 (lkp_type == LB_LKP_ALL_PORT_IP &&
520 (lkp_type == LB_LKP_DIFF_IP_PORT &&
521 (vip->protocol != protocol ||
522 vip->port != port) ) )
524 *vip_index = vip - lbm->vips;
529 return VNET_API_ERROR_NO_SUCH_ENTRY;
533 int lb_vip_port_find_index_with_lock(ip46_address_t *prefix, u8 plen,
534 u8 protocol, u16 port, u32 *vip_index)
536 return lb_vip_port_find_index(prefix, plen, protocol, port,
537 LB_LKP_SAME_IP_PORT, vip_index);
541 int lb_vip_port_find_all_port_vip(ip46_address_t *prefix, u8 plen,
544 return lb_vip_port_find_index(prefix, plen, ~0, 0,
545 LB_LKP_ALL_PORT_IP, vip_index);
548 /* Find out per-port-vip entry with different protocol and port */
550 int lb_vip_port_find_diff_port(ip46_address_t *prefix, u8 plen,
551 u8 protocol, u16 port, u32 *vip_index)
553 return lb_vip_port_find_index(prefix, plen, protocol, port,
554 LB_LKP_DIFF_IP_PORT, vip_index);
557 int lb_vip_find_index(ip46_address_t *prefix, u8 plen, u8 protocol,
558 u16 port, u32 *vip_index)
561 lb_get_writer_lock();
562 ret = lb_vip_port_find_index_with_lock(prefix, plen,
563 protocol, port, vip_index);
564 lb_put_writer_lock();
568 static int lb_as_find_index_vip(lb_vip_t *vip, ip46_address_t *address, u32 *as_index)
570 lb_main_t *lbm = &lb_main;
571 /* This must be called with the lock owned */
572 CLIB_SPINLOCK_ASSERT_LOCKED (&lbm->writer_lock);
575 pool_foreach (asi, vip->as_indexes) {
576 as = &lbm->ass[*asi];
577 if (as->vip_index == (vip - lbm->vips) &&
578 as->address.as_u64[0] == address->as_u64[0] &&
579 as->address.as_u64[1] == address->as_u64[1])
581 *as_index = as - lbm->ass;
588 int lb_vip_add_ass(u32 vip_index, ip46_address_t *addresses, u32 n)
590 lb_main_t *lbm = &lb_main;
591 lb_get_writer_lock();
593 if (!(vip = lb_vip_get_by_index(vip_index))) {
594 lb_put_writer_lock();
595 return VNET_API_ERROR_NO_SUCH_ENTRY;
598 ip46_type_t type = lb_encap_is_ip4(vip)?IP46_TYPE_IP4:IP46_TYPE_IP6;
599 u32 *to_be_added = 0;
600 u32 *to_be_updated = 0;
603 lb_snat_mapping_t *m;
608 if (!lb_as_find_index_vip(vip, &addresses[n], &i)) {
609 if (lbm->ass[i].flags & LB_AS_FLAGS_USED) {
610 vec_free(to_be_added);
611 vec_free(to_be_updated);
612 lb_put_writer_lock();
613 return VNET_API_ERROR_VALUE_EXIST;
615 vec_add1(to_be_updated, i);
619 if (ip46_address_type(&addresses[n]) != type) {
620 vec_free(to_be_added);
621 vec_free(to_be_updated);
622 lb_put_writer_lock();
623 return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
628 while(n2--) //Check for duplicates
629 if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] &&
630 addresses[n2].as_u64[1] == addresses[n].as_u64[1])
634 vec_add1(to_be_added, n);
641 vec_foreach(ip, to_be_updated) {
642 lbm->ass[*ip].flags = LB_AS_FLAGS_USED;
644 vec_free(to_be_updated);
646 //Create those who have to be created
647 vec_foreach(ip, to_be_added) {
650 pool_get(lbm->ass, as);
651 as->address = addresses[*ip];
652 as->flags = LB_AS_FLAGS_USED;
653 as->vip_index = vip_index;
654 pool_get(vip->as_indexes, as_index);
655 *as_index = as - lbm->ass;
658 * become a child of the FIB entry
659 * so we are informed when its forwarding changes
661 fib_prefix_t nh = {};
662 if (lb_encap_is_ip4(vip)) {
663 nh.fp_addr.ip4 = as->address.ip4;
665 nh.fp_proto = FIB_PROTOCOL_IP4;
667 nh.fp_addr.ip6 = as->address.ip6;
669 nh.fp_proto = FIB_PROTOCOL_IP6;
672 as->next_hop_fib_entry_index =
673 fib_table_entry_special_add(0,
676 FIB_ENTRY_FLAG_NONE);
677 as->next_hop_child_index =
678 fib_entry_child_add(as->next_hop_fib_entry_index,
684 if ( lb_vip_is_nat4_port(vip) || lb_vip_is_nat6_port(vip) )
686 /* Add SNAT static mapping */
687 pool_get (lbm->snat_mappings, m);
688 clib_memset (m, 0, sizeof (*m));
689 if (lb_vip_is_nat4_port(vip)) {
690 lb_snat4_key_t m_key4;
691 clib_bihash_kv_8_8_t kv4;
692 m_key4.addr = as->address.ip4;
693 m_key4.port = vip->encap_args.target_port;
695 m_key4.fib_index = 0;
697 if (vip->encap_args.srv_type == LB_SRV_TYPE_CLUSTERIP)
699 m->src_ip.ip4 = vip->prefix.ip4;
701 else if (vip->encap_args.srv_type == LB_SRV_TYPE_NODEPORT)
703 m->src_ip.ip4 = lbm->ip4_src_address;
705 m->src_ip_is_ipv6 = 0;
706 m->as_ip.ip4 = as->address.ip4;
707 m->as_ip_is_ipv6 = 0;
708 m->src_port = vip->port;
709 m->target_port = vip->encap_args.target_port;
713 kv4.key = m_key4.as_u64;
714 kv4.value = m - lbm->snat_mappings;
715 clib_bihash_add_del_8_8(&lbm->mapping_by_as4, &kv4, 1);
717 lb_snat6_key_t m_key6;
718 clib_bihash_kv_24_8_t kv6;
719 m_key6.addr.as_u64[0] = as->address.ip6.as_u64[0];
720 m_key6.addr.as_u64[1] = as->address.ip6.as_u64[1];
721 m_key6.port = vip->encap_args.target_port;
723 m_key6.fib_index = 0;
725 if (vip->encap_args.srv_type == LB_SRV_TYPE_CLUSTERIP)
727 m->src_ip.ip6.as_u64[0] = vip->prefix.ip6.as_u64[0];
728 m->src_ip.ip6.as_u64[1] = vip->prefix.ip6.as_u64[1];
730 else if (vip->encap_args.srv_type == LB_SRV_TYPE_NODEPORT)
732 m->src_ip.ip6.as_u64[0] = lbm->ip6_src_address.as_u64[0];
733 m->src_ip.ip6.as_u64[1] = lbm->ip6_src_address.as_u64[1];
735 m->src_ip_is_ipv6 = 1;
736 m->as_ip.ip6.as_u64[0] = as->address.ip6.as_u64[0];
737 m->as_ip.ip6.as_u64[1] = as->address.ip6.as_u64[1];
738 m->as_ip_is_ipv6 = 1;
739 m->src_port = vip->port;
740 m->target_port = vip->encap_args.target_port;
744 kv6.key[0] = m_key6.as_u64[0];
745 kv6.key[1] = m_key6.as_u64[1];
746 kv6.key[2] = m_key6.as_u64[2];
747 kv6.value = m - lbm->snat_mappings;
748 clib_bihash_add_del_24_8(&lbm->mapping_by_as6, &kv6, 1);
752 vec_free(to_be_added);
755 lb_vip_update_new_flow_table(vip);
757 //Garbage collection maybe
758 lb_vip_garbage_collection(vip);
760 lb_put_writer_lock();
765 lb_flush_vip_as (u32 vip_index, u32 as_index)
768 vlib_thread_main_t *tm = vlib_get_thread_main();
769 lb_main_t *lbm = &lb_main;
771 for(thread_index = 0; thread_index < tm->n_vlib_mains; thread_index++ ) {
772 lb_hash_t *h = lbm->per_cpu[thread_index].sticky_ht;
777 lb_hash_foreach_entry(h, b, i) {
778 if ((vip_index == ~0)
779 || ((b->vip[i] == vip_index) && (as_index == ~0))
780 || ((b->vip[i] == vip_index) && (b->value[i] == as_index)))
782 vlib_refcount_add(&lbm->as_refcount, thread_index, b->value[i], -1);
783 vlib_refcount_add(&lbm->as_refcount, thread_index, 0, 1);
791 lbm->per_cpu[thread_index].sticky_ht = 0;
799 int lb_vip_del_ass_withlock(u32 vip_index, ip46_address_t *addresses, u32 n,
802 lb_main_t *lbm = &lb_main;
803 u32 now = (u32) vlib_time_now(vlib_get_main());
808 if (!(vip = lb_vip_get_by_index(vip_index))) {
809 return VNET_API_ERROR_NO_SUCH_ENTRY;
814 if (lb_as_find_index_vip(vip, &addresses[n], &as_index)) {
816 return VNET_API_ERROR_NO_SUCH_ENTRY;
819 if (n) { //Check for duplicates
822 if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] &&
823 addresses[n2].as_u64[1] == addresses[n].as_u64[1])
828 vec_add1(indexes, as_index);
833 //Garbage collection maybe
834 lb_vip_garbage_collection(vip);
836 if (indexes != NULL) {
837 vec_foreach(ip, indexes) {
838 lbm->ass[*ip].flags &= ~LB_AS_FLAGS_USED;
839 lbm->ass[*ip].last_used = now;
843 /* flush flow table for deleted ASs*/
844 lb_flush_vip_as(vip_index, *ip);
849 lb_vip_update_new_flow_table(vip);
856 int lb_vip_del_ass(u32 vip_index, ip46_address_t *addresses, u32 n, u8 flush)
858 lb_get_writer_lock();
859 int ret = lb_vip_del_ass_withlock(vip_index, addresses, n, flush);
860 lb_put_writer_lock();
866 lb_vip_prefix_index_alloc (lb_main_t *lbm)
869 * Check for dynamically allocated instance number.
873 bit = clib_bitmap_first_clear (lbm->vip_prefix_indexes);
875 lbm->vip_prefix_indexes = clib_bitmap_set(lbm->vip_prefix_indexes, bit, 1);
881 lb_vip_prefix_index_free (lb_main_t *lbm, u32 instance)
884 if (clib_bitmap_get (lbm->vip_prefix_indexes, instance) == 0)
889 lbm->vip_prefix_indexes = clib_bitmap_set (lbm->vip_prefix_indexes,
896 * Add the VIP adjacency to the ip4 or ip6 fib
898 static void lb_vip_add_adjacency(lb_main_t *lbm, lb_vip_t *vip,
899 u32 *vip_prefix_index)
901 dpo_proto_t proto = 0;
902 dpo_type_t dpo_type = 0;
907 /* for per-port vip, if VIP adjacency has been added,
908 * no need to add adjacency. */
909 if (!lb_vip_port_find_diff_port(&(vip->prefix), vip->plen,
910 vip->protocol, vip->port, &vip_idx))
912 lb_vip_t *exists_vip = lb_vip_get_by_index(vip_idx);
913 *vip_prefix_index = exists_vip ? exists_vip->vip_prefix_index : ~0;
917 /* Allocate an index for per-port vip */
918 *vip_prefix_index = lb_vip_prefix_index_alloc(lbm);
922 *vip_prefix_index = vip - lbm->vips;
925 dpo_id_t dpo = DPO_INVALID;
926 fib_prefix_t pfx = {};
927 if (lb_vip_is_ip4(vip->type)) {
928 pfx.fp_addr.ip4 = vip->prefix.ip4;
929 pfx.fp_len = vip->plen - 96;
930 pfx.fp_proto = FIB_PROTOCOL_IP4;
931 proto = DPO_PROTO_IP4;
933 pfx.fp_addr.ip6 = vip->prefix.ip6;
934 pfx.fp_len = vip->plen;
935 pfx.fp_proto = FIB_PROTOCOL_IP6;
936 proto = DPO_PROTO_IP6;
939 if (lb_vip_is_gre4(vip))
940 dpo_type = lbm->dpo_gre4_type;
941 else if (lb_vip_is_gre6(vip))
942 dpo_type = lbm->dpo_gre6_type;
943 else if (lb_vip_is_gre4_port(vip))
944 dpo_type = lbm->dpo_gre4_port_type;
945 else if (lb_vip_is_gre6_port(vip))
946 dpo_type = lbm->dpo_gre6_port_type;
947 else if (lb_vip_is_l3dsr(vip))
948 dpo_type = lbm->dpo_l3dsr_type;
949 else if (lb_vip_is_l3dsr_port(vip))
950 dpo_type = lbm->dpo_l3dsr_port_type;
951 else if(lb_vip_is_nat4_port(vip))
952 dpo_type = lbm->dpo_nat4_port_type;
953 else if (lb_vip_is_nat6_port(vip))
954 dpo_type = lbm->dpo_nat6_port_type;
956 dpo_set(&dpo, dpo_type, proto, *vip_prefix_index);
957 fib_table_entry_special_dpo_add(0,
960 FIB_ENTRY_FLAG_EXCLUSIVE,
966 * Add the VIP filter entry
968 static int lb_vip_add_port_filter(lb_main_t *lbm, lb_vip_t *vip,
969 u32 vip_prefix_index, u32 vip_idx)
972 clib_bihash_kv_8_8_t kv;
974 key.vip_prefix_index = vip_prefix_index;
975 key.protocol = vip->protocol;
976 key.port = clib_host_to_net_u16(vip->port);
981 clib_bihash_add_del_8_8(&lbm->vip_index_per_port, &kv, 1);
987 * Del the VIP filter entry
989 static int lb_vip_del_port_filter(lb_main_t *lbm, lb_vip_t *vip)
992 clib_bihash_kv_8_8_t kv, value;
995 key.vip_prefix_index = vip->vip_prefix_index;
996 key.protocol = vip->protocol;
997 key.port = clib_host_to_net_u16(vip->port);
1000 kv.key = key.as_u64;
1001 if(clib_bihash_search_8_8(&lbm->vip_index_per_port, &kv, &value) != 0)
1003 clib_warning("looking up vip_index_per_port failed.");
1004 return VNET_API_ERROR_NO_SUCH_ENTRY;
1006 m = pool_elt_at_index (lbm->vips, value.value);
1009 kv.value = m - lbm->vips;
1010 clib_bihash_add_del_8_8(&lbm->vip_index_per_port, &kv, 0);
1016 * Deletes the adjacency associated with the VIP
1018 static void lb_vip_del_adjacency(lb_main_t *lbm, lb_vip_t *vip)
1020 fib_prefix_t pfx = {};
1025 /* If this vip adjacency is used by other per-port vip,
1026 * no need to del this adjacency. */
1027 if (!lb_vip_port_find_diff_port(&(vip->prefix), vip->plen,
1028 vip->protocol, vip->port, &vip_idx))
1030 lb_put_writer_lock();
1034 /* Return vip_prefix_index for per-port vip */
1035 lb_vip_prefix_index_free(lbm, vip->vip_prefix_index);
1039 if (lb_vip_is_ip4(vip->type)) {
1040 pfx.fp_addr.ip4 = vip->prefix.ip4;
1041 pfx.fp_len = vip->plen - 96;
1042 pfx.fp_proto = FIB_PROTOCOL_IP4;
1044 pfx.fp_addr.ip6 = vip->prefix.ip6;
1045 pfx.fp_len = vip->plen;
1046 pfx.fp_proto = FIB_PROTOCOL_IP6;
1048 fib_table_entry_special_remove(0, &pfx, lb_fib_src);
1051 int lb_vip_add(lb_vip_add_args_t args, u32 *vip_index)
1053 lb_main_t *lbm = &lb_main;
1054 vlib_main_t *vm = vlib_get_main();
1056 lb_vip_type_t type = args.type;
1057 u32 vip_prefix_index = 0;
1059 lb_get_writer_lock();
1060 ip46_prefix_normalize(&(args.prefix), args.plen);
1062 if (!lb_vip_port_find_index_with_lock(&(args.prefix), args.plen,
1063 args.protocol, args.port,
1066 lb_put_writer_lock();
1067 return VNET_API_ERROR_VALUE_EXIST;
1070 /* Make sure we can't add a per-port VIP entry
1071 * when there already is an all-port VIP for the same prefix. */
1072 if ((args.port != 0) &&
1073 !lb_vip_port_find_all_port_vip(&(args.prefix), args.plen, vip_index))
1075 lb_put_writer_lock();
1076 return VNET_API_ERROR_VALUE_EXIST;
1079 /* Make sure we can't add a all-port VIP entry
1080 * when there already is an per-port VIP for the same prefix. */
1081 if ((args.port == 0) &&
1082 !lb_vip_port_find_diff_port(&(args.prefix), args.plen,
1083 args.protocol, args.port, vip_index))
1085 lb_put_writer_lock();
1086 return VNET_API_ERROR_VALUE_EXIST;
1089 /* Make sure all VIP for a given prefix (using different ports) have the same type. */
1090 if ((args.port != 0) &&
1091 !lb_vip_port_find_diff_port(&(args.prefix), args.plen,
1092 args.protocol, args.port, vip_index)
1093 && (args.type != lbm->vips[*vip_index].type))
1095 lb_put_writer_lock();
1096 return VNET_API_ERROR_INVALID_ARGUMENT;
1099 if (!is_pow2(args.new_length)) {
1100 lb_put_writer_lock();
1101 return VNET_API_ERROR_INVALID_MEMORY_SIZE;
1104 if (ip46_prefix_is_ip4(&(args.prefix), args.plen) &&
1105 !lb_vip_is_ip4(type)) {
1106 lb_put_writer_lock();
1107 return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
1110 if ((!ip46_prefix_is_ip4(&(args.prefix), args.plen)) &&
1111 !lb_vip_is_ip6(type)) {
1112 lb_put_writer_lock();
1113 return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
1116 if ((type == LB_VIP_TYPE_IP4_L3DSR) &&
1117 (args.encap_args.dscp >= 64) )
1119 lb_put_writer_lock();
1120 return VNET_API_ERROR_VALUE_EXIST;
1124 pool_get(lbm->vips, vip);
1127 memcpy (&(vip->prefix), &(args.prefix), sizeof(args.prefix));
1128 vip->plen = args.plen;
1131 vip->protocol = args.protocol;
1132 vip->port = args.port;
1136 vip->protocol = (u8)~0;
1139 vip->last_garbage_collection = (u32) vlib_time_now(vlib_get_main());
1140 vip->type = args.type;
1142 if (args.type == LB_VIP_TYPE_IP4_L3DSR) {
1143 vip->encap_args.dscp = args.encap_args.dscp;
1145 else if ((args.type == LB_VIP_TYPE_IP4_NAT4)
1146 ||(args.type == LB_VIP_TYPE_IP6_NAT6)) {
1147 vip->encap_args.srv_type = args.encap_args.srv_type;
1148 vip->encap_args.target_port =
1149 clib_host_to_net_u16(args.encap_args.target_port);
1152 vip->flags = LB_VIP_FLAGS_USED;
1153 if (args.src_ip_sticky)
1155 vip->flags |= LB_VIP_FLAGS_SRC_IP_STICKY;
1157 vip->as_indexes = 0;
1161 for (i = 0; i < LB_N_VIP_COUNTERS; i++) {
1162 vlib_validate_simple_counter(&lbm->vip_counters[i], vip - lbm->vips);
1163 vlib_zero_simple_counter(&lbm->vip_counters[i], vip - lbm->vips);
1166 //Configure new flow table
1167 vip->new_flow_table_mask = args.new_length - 1;
1168 vip->new_flow_table = 0;
1170 //Update flow hash table
1171 lb_vip_update_new_flow_table(vip);
1173 //Create adjacency to direct traffic
1174 lb_vip_add_adjacency(lbm, vip, &vip_prefix_index);
1176 if ( (lb_vip_is_nat4_port(vip) || lb_vip_is_nat6_port(vip))
1177 && (args.encap_args.srv_type == LB_SRV_TYPE_NODEPORT) )
1182 //Create maping from nodeport to vip_index
1183 key = clib_host_to_net_u16(args.port);
1184 entry = hash_get_mem (lbm->vip_index_by_nodeport, &key);
1186 lb_put_writer_lock();
1187 return VNET_API_ERROR_VALUE_EXIST;
1190 hash_set_mem (lbm->vip_index_by_nodeport, &key, vip - lbm->vips);
1192 /* receive packets destined to NodeIP:NodePort */
1193 udp_register_dst_port (vm, args.port, lb4_nodeport_node.index, 1);
1194 udp_register_dst_port (vm, args.port, lb6_nodeport_node.index, 0);
1197 *vip_index = vip - lbm->vips;
1198 //Create per-port vip filtering table
1201 lb_vip_add_port_filter(lbm, vip, vip_prefix_index, *vip_index);
1202 vip->vip_prefix_index = vip_prefix_index;
1205 lb_put_writer_lock();
1209 int lb_vip_del(u32 vip_index)
1211 lb_main_t *lbm = &lb_main;
1215 /* Does not remove default vip, i.e. vip_index = 0 */
1217 return VNET_API_ERROR_INVALID_VALUE;
1219 lb_get_writer_lock();
1220 if (!(vip = lb_vip_get_by_index(vip_index))) {
1221 lb_put_writer_lock();
1222 return VNET_API_ERROR_NO_SUCH_ENTRY;
1225 //FIXME: This operation is actually not working
1226 //We will need to remove state before performing this.
1230 ip46_address_t *ass = 0;
1234 pool_foreach (as_index, vip->as_indexes) {
1235 as = &lbm->ass[*as_index];
1236 vec_add1(ass, as->address);
1239 lb_vip_del_ass_withlock(vip_index, ass, vec_len(ass), 0);
1244 lb_vip_del_adjacency(lbm, vip);
1246 //Delete per-port vip filtering entry
1249 rv = lb_vip_del_port_filter(lbm, vip);
1252 //Set the VIP as unused
1253 vip->flags &= ~LB_VIP_FLAGS_USED;
1255 lb_put_writer_lock();
1260 VLIB_PLUGIN_REGISTER () = {
1261 .version = VPP_BUILD_VER,
1262 .description = "Load Balancer (LB)",
1266 u8 *format_lb_dpo (u8 * s, va_list * va)
1268 index_t index = va_arg (*va, index_t);
1269 CLIB_UNUSED(u32 indent) = va_arg (*va, u32);
1270 lb_main_t *lbm = &lb_main;
1271 lb_vip_t *vip = pool_elt_at_index (lbm->vips, index);
1272 return format (s, "%U", format_lb_vip, vip);
1275 static void lb_dpo_lock (dpo_id_t *dpo) {}
1276 static void lb_dpo_unlock (dpo_id_t *dpo) {}
1279 lb_fib_node_get_node (fib_node_index_t index)
1281 lb_main_t *lbm = &lb_main;
1282 lb_as_t *as = pool_elt_at_index (lbm->ass, index);
1283 return (&as->fib_node);
1287 lb_fib_node_last_lock_gone (fib_node_t *node)
1292 lb_as_from_fib_node (fib_node_t *node)
1294 return ((lb_as_t*)(((char*)node) -
1295 STRUCT_OFFSET_OF(lb_as_t, fib_node)));
1299 lb_as_stack (lb_as_t *as)
1301 lb_main_t *lbm = &lb_main;
1302 lb_vip_t *vip = &lbm->vips[as->vip_index];
1303 dpo_type_t dpo_type = 0;
1305 if (lb_vip_is_gre4(vip))
1306 dpo_type = lbm->dpo_gre4_type;
1307 else if (lb_vip_is_gre6(vip))
1308 dpo_type = lbm->dpo_gre6_type;
1309 else if (lb_vip_is_gre4_port(vip))
1310 dpo_type = lbm->dpo_gre4_port_type;
1311 else if (lb_vip_is_gre6_port(vip))
1312 dpo_type = lbm->dpo_gre6_port_type;
1313 else if (lb_vip_is_l3dsr(vip))
1314 dpo_type = lbm->dpo_l3dsr_type;
1315 else if (lb_vip_is_l3dsr_port(vip))
1316 dpo_type = lbm->dpo_l3dsr_port_type;
1317 else if(lb_vip_is_nat4_port(vip))
1318 dpo_type = lbm->dpo_nat4_port_type;
1319 else if (lb_vip_is_nat6_port(vip))
1320 dpo_type = lbm->dpo_nat6_port_type;
1323 lb_vip_is_ip4(vip->type)?DPO_PROTO_IP4:DPO_PROTO_IP6,
1325 fib_entry_contribute_ip_forwarding(
1326 as->next_hop_fib_entry_index));
1329 static fib_node_back_walk_rc_t
1330 lb_fib_node_back_walk_notify (fib_node_t *node,
1331 fib_node_back_walk_ctx_t *ctx)
1333 lb_as_stack(lb_as_from_fib_node(node));
1334 return (FIB_NODE_BACK_WALK_CONTINUE);
1337 int lb_nat4_interface_add_del (u32 sw_if_index, int is_del)
1341 vnet_feature_enable_disable ("ip4-unicast", "lb-nat4-in2out",
1342 sw_if_index, 0, 0, 0);
1346 vnet_feature_enable_disable ("ip4-unicast", "lb-nat4-in2out",
1347 sw_if_index, 1, 0, 0);
1353 int lb_nat6_interface_add_del (u32 sw_if_index, int is_del)
1357 vnet_feature_enable_disable ("ip6-unicast", "lb-nat6-in2out",
1358 sw_if_index, 0, 0, 0);
1362 vnet_feature_enable_disable ("ip6-unicast", "lb-nat6-in2out",
1363 sw_if_index, 1, 0, 0);
1370 lb_init (vlib_main_t * vm)
1372 vlib_thread_main_t *tm = vlib_get_thread_main ();
1373 lb_main_t *lbm = &lb_main;
1374 lbm->vnet_main = vnet_get_main ();
1375 lbm->vlib_main = vm;
1377 lb_vip_t *default_vip;
1378 lb_as_t *default_as;
1379 fib_node_vft_t lb_fib_node_vft = {
1380 .fnv_get = lb_fib_node_get_node,
1381 .fnv_last_lock = lb_fib_node_last_lock_gone,
1382 .fnv_back_walk = lb_fib_node_back_walk_notify,
1384 dpo_vft_t lb_vft = {
1385 .dv_lock = lb_dpo_lock,
1386 .dv_unlock = lb_dpo_unlock,
1387 .dv_format = format_lb_dpo,
1390 //Allocate and init default VIP.
1392 pool_get(lbm->vips, default_vip);
1393 default_vip->new_flow_table_mask = 0;
1394 default_vip->prefix.ip6.as_u64[0] = 0xffffffffffffffffL;
1395 default_vip->prefix.ip6.as_u64[1] = 0xffffffffffffffffL;
1396 default_vip->protocol = ~0;
1397 default_vip->port = 0;
1398 default_vip->flags = LB_VIP_FLAGS_USED;
1401 vec_validate(lbm->per_cpu, tm->n_vlib_mains - 1);
1402 clib_spinlock_init (&lbm->writer_lock);
1403 lbm->per_cpu_sticky_buckets = LB_DEFAULT_PER_CPU_STICKY_BUCKETS;
1404 lbm->flow_timeout = LB_DEFAULT_FLOW_TIMEOUT;
1405 lbm->ip4_src_address.as_u32 = 0xffffffff;
1406 lbm->ip6_src_address.as_u64[0] = 0xffffffffffffffffL;
1407 lbm->ip6_src_address.as_u64[1] = 0xffffffffffffffffL;
1408 lbm->dpo_gre4_type = dpo_register_new_type(&lb_vft, lb_dpo_gre4_nodes);
1409 lbm->dpo_gre6_type = dpo_register_new_type(&lb_vft, lb_dpo_gre6_nodes);
1410 lbm->dpo_gre4_port_type = dpo_register_new_type(&lb_vft,
1411 lb_dpo_gre4_port_nodes);
1412 lbm->dpo_gre6_port_type = dpo_register_new_type(&lb_vft,
1413 lb_dpo_gre6_port_nodes);
1414 lbm->dpo_l3dsr_type = dpo_register_new_type(&lb_vft,
1415 lb_dpo_l3dsr_nodes);
1416 lbm->dpo_l3dsr_port_type = dpo_register_new_type(&lb_vft,
1417 lb_dpo_l3dsr_port_nodes);
1418 lbm->dpo_nat4_port_type = dpo_register_new_type(&lb_vft,
1419 lb_dpo_nat4_port_nodes);
1420 lbm->dpo_nat6_port_type = dpo_register_new_type(&lb_vft,
1421 lb_dpo_nat6_port_nodes);
1422 lbm->fib_node_type = fib_node_register_new_type ("lb", &lb_fib_node_vft);
1424 //Init AS reference counters
1425 vlib_refcount_init(&lbm->as_refcount);
1427 //Allocate and init default AS.
1429 pool_get(lbm->ass, default_as);
1430 default_as->flags = 0;
1431 default_as->dpo.dpoi_next_node = LB_NEXT_DROP;
1432 default_as->vip_index = ~0;
1433 default_as->address.ip6.as_u64[0] = 0xffffffffffffffffL;
1434 default_as->address.ip6.as_u64[1] = 0xffffffffffffffffL;
1436 /* Generate a valid flow table for default VIP */
1437 default_vip->as_indexes = NULL;
1438 lb_get_writer_lock();
1439 lb_vip_update_new_flow_table(default_vip);
1440 lb_put_writer_lock();
1442 lbm->vip_index_by_nodeport
1443 = hash_create_mem (0, sizeof(u16), sizeof (uword));
1445 clib_bihash_init_8_8 (&lbm->vip_index_per_port,
1446 "vip_index_per_port", LB_VIP_PER_PORT_BUCKETS,
1447 LB_VIP_PER_PORT_MEMORY_SIZE);
1449 clib_bihash_init_8_8 (&lbm->mapping_by_as4,
1450 "mapping_by_as4", LB_MAPPING_BUCKETS,
1451 LB_MAPPING_MEMORY_SIZE);
1453 clib_bihash_init_24_8 (&lbm->mapping_by_as6,
1454 "mapping_by_as6", LB_MAPPING_BUCKETS,
1455 LB_MAPPING_MEMORY_SIZE);
1457 #define _(a,b,c) lbm->vip_counters[c].name = b;
1458 lb_foreach_vip_counter
1461 lb_fib_src = fib_source_allocate("lb",
1462 FIB_SOURCE_PRIORITY_HI,
1463 FIB_SOURCE_BH_SIMPLE);
1468 VLIB_INIT_FUNCTION (lb_init);