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>
21 //GC runs at most once every so many seconds
22 #define LB_GARBAGE_RUN 60
24 //After so many seconds. It is assumed that inter-core race condition will not occur.
25 #define LB_CONCURRENCY_TIMEOUT 10
29 #define lb_get_writer_lock() do {} while(__sync_lock_test_and_set (lb_main.writer_lock, 1))
30 #define lb_put_writer_lock() lb_main.writer_lock[0] = 0
32 static void lb_as_stack (lb_as_t *as);
35 const static char * const lb_dpo_gre4_ip4[] = { "lb4-gre4" , NULL };
36 const static char * const lb_dpo_gre4_ip6[] = { "lb6-gre4" , NULL };
37 const static char* const * const lb_dpo_gre4_nodes[DPO_PROTO_NUM] =
39 [DPO_PROTO_IP4] = lb_dpo_gre4_ip4,
40 [DPO_PROTO_IP6] = lb_dpo_gre4_ip6,
43 const static char * const lb_dpo_gre6_ip4[] = { "lb4-gre6" , NULL };
44 const static char * const lb_dpo_gre6_ip6[] = { "lb6-gre6" , NULL };
45 const static char* const * const lb_dpo_gre6_nodes[DPO_PROTO_NUM] =
47 [DPO_PROTO_IP4] = lb_dpo_gre6_ip4,
48 [DPO_PROTO_IP6] = lb_dpo_gre6_ip6,
51 u32 lb_hash_time_now(vlib_main_t * vm)
53 return (u32) (vlib_time_now(vm) + 10000);
56 u8 *format_lb_main (u8 * s, va_list * args)
58 vlib_thread_main_t *tm = vlib_get_thread_main();
59 lb_main_t *lbm = &lb_main;
60 s = format(s, "lb_main");
61 s = format(s, " ip4-src-address: %U \n", format_ip4_address, &lbm->ip4_src_address);
62 s = format(s, " ip6-src-address: %U \n", format_ip6_address, &lbm->ip6_src_address);
63 s = format(s, " #vips: %u\n", pool_elts(lbm->vips));
64 s = format(s, " #ass: %u\n", pool_elts(lbm->ass) - 1);
67 for(thread_index = 0; thread_index < tm->n_vlib_mains; thread_index++ ) {
68 lb_hash_t *h = lbm->per_cpu[thread_index].sticky_ht;
70 s = format(s, "core %d\n", thread_index);
71 s = format(s, " timeout: %ds\n", h->timeout);
72 s = format(s, " usage: %d / %d\n", lb_hash_elts(h, lb_hash_time_now(vlib_get_main())), lb_hash_size(h));
79 static char *lb_vip_type_strings[] = {
80 [LB_VIP_TYPE_IP6_GRE6] = "ip6-gre6",
81 [LB_VIP_TYPE_IP6_GRE4] = "ip6-gre4",
82 [LB_VIP_TYPE_IP4_GRE6] = "ip4-gre6",
83 [LB_VIP_TYPE_IP4_GRE4] = "ip4-gre4",
86 u8 *format_lb_vip_type (u8 * s, va_list * args)
88 lb_vip_type_t vipt = va_arg (*args, lb_vip_type_t);
90 for (i=0; i<LB_VIP_N_TYPES; i++)
92 return format(s, lb_vip_type_strings[i]);
93 return format(s, "_WRONG_TYPE_");
96 uword unformat_lb_vip_type (unformat_input_t * input, va_list * args)
98 lb_vip_type_t *vipt = va_arg (*args, lb_vip_type_t *);
100 for (i=0; i<LB_VIP_N_TYPES; i++)
101 if (unformat(input, lb_vip_type_strings[i])) {
108 u8 *format_lb_vip (u8 * s, va_list * args)
110 lb_vip_t *vip = va_arg (*args, lb_vip_t *);
111 return format(s, "%U %U new_size:%u #as:%u%s",
112 format_lb_vip_type, vip->type,
113 format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY,
114 vip->new_flow_table_mask + 1,
115 pool_elts(vip->as_indexes),
116 (vip->flags & LB_VIP_FLAGS_USED)?"":" removed");
119 u8 *format_lb_as (u8 * s, va_list * args)
121 lb_as_t *as = va_arg (*args, lb_as_t *);
122 return format(s, "%U %s", format_ip46_address,
123 &as->address, IP46_TYPE_ANY,
124 (as->flags & LB_AS_FLAGS_USED)?"used":"removed");
127 u8 *format_lb_vip_detailed (u8 * s, va_list * args)
129 lb_main_t *lbm = &lb_main;
130 lb_vip_t *vip = va_arg (*args, lb_vip_t *);
131 uword indent = format_get_indent (s);
133 s = format(s, "%U %U [%u] %U%s\n"
135 format_white_space, indent,
136 format_lb_vip_type, vip->type,
137 vip - lbm->vips, format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY,
138 (vip->flags & LB_VIP_FLAGS_USED)?"":" removed",
139 format_white_space, indent,
140 vip->new_flow_table_mask + 1);
143 s = format(s, "%U counters:\n",
144 format_white_space, indent);
146 for (i=0; i<LB_N_VIP_COUNTERS; i++)
147 s = format(s, "%U %s: %d\n",
148 format_white_space, indent,
149 lbm->vip_counters[i].name,
150 vlib_get_simple_counter(&lbm->vip_counters[i], vip - lbm->vips));
153 s = format(s, "%U #as:%u\n",
154 format_white_space, indent,
155 pool_elts(vip->as_indexes));
157 //Let's count the buckets for each AS
159 vec_validate(count, pool_len(lbm->ass)); //Possibly big alloc for not much...
160 lb_new_flow_entry_t *nfe;
161 vec_foreach(nfe, vip->new_flow_table)
162 count[nfe->as_index]++;
166 pool_foreach(as_index, vip->as_indexes, {
167 as = &lbm->ass[*as_index];
168 s = format(s, "%U %U %d buckets %d flows dpo:%u %s\n",
169 format_white_space, indent,
170 format_ip46_address, &as->address, IP46_TYPE_ANY,
171 count[as - lbm->ass],
172 vlib_refcount_get(&lbm->as_refcount, as - lbm->ass),
174 (as->flags & LB_AS_FLAGS_USED)?"used":" removed");
180 s = format(s, "%U new flows table:\n", format_white_space, indent);
181 lb_new_flow_entry_t *nfe;
182 vec_foreach(nfe, vip->new_flow_table) {
183 s = format(s, "%U %d: %d\n", format_white_space, indent, nfe - vip->new_flow_table, nfe->as_index);
195 static int lb_pseudorand_compare(void *a, void *b)
198 lb_main_t *lbm = &lb_main;
199 asa = &lbm->ass[((lb_pseudorand_t *)a)->as_index];
200 asb = &lbm->ass[((lb_pseudorand_t *)b)->as_index];
201 return memcmp(&asa->address, &asb->address, sizeof(asb->address));
204 static void lb_vip_garbage_collection(lb_vip_t *vip)
206 lb_main_t *lbm = &lb_main;
207 ASSERT (lbm->writer_lock[0]);
209 u32 now = (u32) vlib_time_now(vlib_get_main());
210 if (!clib_u32_loop_gt(now, vip->last_garbage_collection + LB_GARBAGE_RUN))
213 vip->last_garbage_collection = now;
216 pool_foreach(as_index, vip->as_indexes, {
217 as = &lbm->ass[*as_index];
218 if (!(as->flags & LB_AS_FLAGS_USED) && //Not used
219 clib_u32_loop_gt(now, as->last_used + LB_CONCURRENCY_TIMEOUT) && //Not recently used
220 (vlib_refcount_get(&lbm->as_refcount, as - lbm->ass) == 0))
222 fib_entry_child_remove(as->next_hop_fib_entry_index,
223 as->next_hop_child_index);
224 fib_table_entry_delete_index(as->next_hop_fib_entry_index,
226 as->next_hop_fib_entry_index = FIB_NODE_INDEX_INVALID;
228 pool_put(vip->as_indexes, as_index);
229 pool_put(lbm->ass, as);
234 void lb_garbage_collection()
236 lb_main_t *lbm = &lb_main;
237 lb_get_writer_lock();
239 u32 *to_be_removed_vips = 0, *i;
240 pool_foreach(vip, lbm->vips, {
241 lb_vip_garbage_collection(vip);
243 if (!(vip->flags & LB_VIP_FLAGS_USED) &&
244 (pool_elts(vip->as_indexes) == 0)) {
245 vec_add1(to_be_removed_vips, vip - lbm->vips);
249 vec_foreach(i, to_be_removed_vips) {
250 vip = &lbm->vips[*i];
251 pool_put(lbm->vips, vip);
252 pool_free(vip->as_indexes);
255 vec_free(to_be_removed_vips);
256 lb_put_writer_lock();
259 static void lb_vip_update_new_flow_table(lb_vip_t *vip)
261 lb_main_t *lbm = &lb_main;
262 lb_new_flow_entry_t *old_table;
264 lb_new_flow_entry_t *new_flow_table = 0;
266 lb_pseudorand_t *pr, *sort_arr = 0;
269 ASSERT (lbm->writer_lock[0]); //We must have the lock
271 //Check if some AS is configured or not
273 pool_foreach(as_index, vip->as_indexes, {
274 as = &lbm->ass[*as_index];
275 if (as->flags & LB_AS_FLAGS_USED) { //Not used anymore
277 goto out; //Not sure 'break' works in this macro-loop
283 //Only the default. i.e. no AS
284 vec_validate(new_flow_table, vip->new_flow_table_mask);
285 for (i=0; i<vec_len(new_flow_table); i++)
286 new_flow_table[i].as_index = 0;
291 //First, let's sort the ASs
293 vec_alloc(sort_arr, pool_elts(vip->as_indexes));
296 pool_foreach(as_index, vip->as_indexes, {
297 as = &lbm->ass[*as_index];
298 if (!(as->flags & LB_AS_FLAGS_USED)) //Not used anymore
301 sort_arr[i].as_index = as - lbm->ass;
304 _vec_len(sort_arr) = i;
306 vec_sort_with_function(sort_arr, lb_pseudorand_compare);
308 //Now let's pseudo-randomly generate permutations
309 vec_foreach(pr, sort_arr) {
310 lb_as_t *as = &lbm->ass[pr->as_index];
312 u64 seed = clib_xxhash(as->address.as_u64[0] ^
313 as->address.as_u64[1]);
314 /* We have 2^n buckets.
315 * skip must be prime with 2^n.
316 * So skip must be odd.
317 * MagLev actually state that M should be prime,
318 * but this has a big computation cost (% operation).
319 * Using 2^n is more better (& operation).
321 pr->skip = ((seed & 0xffffffff) | 1) & vip->new_flow_table_mask;
322 pr->last = (seed >> 32) & vip->new_flow_table_mask;
325 //Let's create a new flow table
326 vec_validate(new_flow_table, vip->new_flow_table_mask);
327 for (i=0; i<vec_len(new_flow_table); i++)
328 new_flow_table[i].as_index = ~0;
332 vec_foreach(pr, sort_arr) {
335 pr->last = (pr->last + pr->skip) & vip->new_flow_table_mask;
336 if (new_flow_table[last].as_index == ~0) {
337 new_flow_table[last].as_index = pr->as_index;
342 if (done == vec_len(new_flow_table))
351 //Count number of changed entries
353 for (i=0; i<vec_len(new_flow_table); i++)
354 if (vip->new_flow_table == 0 ||
355 new_flow_table[i].as_index != vip->new_flow_table[i].as_index)
358 old_table = vip->new_flow_table;
359 vip->new_flow_table = new_flow_table;
363 int lb_conf(ip4_address_t *ip4_address, ip6_address_t *ip6_address,
364 u32 per_cpu_sticky_buckets, u32 flow_timeout)
366 lb_main_t *lbm = &lb_main;
368 if (!is_pow2(per_cpu_sticky_buckets))
369 return VNET_API_ERROR_INVALID_MEMORY_SIZE;
371 lb_get_writer_lock(); //Not exactly necessary but just a reminder that it exists for my future self
372 lbm->ip4_src_address = *ip4_address;
373 lbm->ip6_src_address = *ip6_address;
374 lbm->per_cpu_sticky_buckets = per_cpu_sticky_buckets;
375 lbm->flow_timeout = flow_timeout;
376 lb_put_writer_lock();
381 int lb_vip_find_index_with_lock(ip46_address_t *prefix, u8 plen, u32 *vip_index)
383 lb_main_t *lbm = &lb_main;
385 ASSERT (lbm->writer_lock[0]); //This must be called with the lock owned
386 ip46_prefix_normalize(prefix, plen);
387 pool_foreach(vip, lbm->vips, {
388 if ((vip->flags & LB_AS_FLAGS_USED) &&
390 vip->prefix.as_u64[0] == prefix->as_u64[0] &&
391 vip->prefix.as_u64[1] == prefix->as_u64[1]) {
392 *vip_index = vip - lbm->vips;
396 return VNET_API_ERROR_NO_SUCH_ENTRY;
399 int lb_vip_find_index(ip46_address_t *prefix, u8 plen, u32 *vip_index)
402 lb_get_writer_lock();
403 ret = lb_vip_find_index_with_lock(prefix, plen, vip_index);
404 lb_put_writer_lock();
408 static int lb_as_find_index_vip(lb_vip_t *vip, ip46_address_t *address, u32 *as_index)
410 lb_main_t *lbm = &lb_main;
411 ASSERT (lbm->writer_lock[0]); //This must be called with the lock owned
414 pool_foreach(asi, vip->as_indexes, {
415 as = &lbm->ass[*asi];
416 if (as->vip_index == (vip - lbm->vips) &&
417 as->address.as_u64[0] == address->as_u64[0] &&
418 as->address.as_u64[1] == address->as_u64[1]) {
419 *as_index = as - lbm->ass;
426 int lb_vip_add_ass(u32 vip_index, ip46_address_t *addresses, u32 n)
428 lb_main_t *lbm = &lb_main;
429 lb_get_writer_lock();
431 if (!(vip = lb_vip_get_by_index(vip_index))) {
432 lb_put_writer_lock();
433 return VNET_API_ERROR_NO_SUCH_ENTRY;
436 ip46_type_t type = lb_vip_is_gre4(vip)?IP46_TYPE_IP4:IP46_TYPE_IP6;
437 u32 *to_be_added = 0;
438 u32 *to_be_updated = 0;
445 if (!lb_as_find_index_vip(vip, &addresses[n], &i)) {
446 if (lbm->ass[i].flags & LB_AS_FLAGS_USED) {
447 vec_free(to_be_added);
448 vec_free(to_be_updated);
449 lb_put_writer_lock();
450 return VNET_API_ERROR_VALUE_EXIST;
452 vec_add1(to_be_updated, i);
456 if (ip46_address_type(&addresses[n]) != type) {
457 vec_free(to_be_added);
458 vec_free(to_be_updated);
459 lb_put_writer_lock();
460 return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
465 while(n2--) //Check for duplicates
466 if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] &&
467 addresses[n2].as_u64[1] == addresses[n].as_u64[1])
471 vec_add1(to_be_added, n);
478 vec_foreach(ip, to_be_updated) {
479 lbm->ass[*ip].flags = LB_AS_FLAGS_USED;
481 vec_free(to_be_updated);
483 //Create those who have to be created
484 vec_foreach(ip, to_be_added) {
487 pool_get(lbm->ass, as);
488 as->address = addresses[*ip];
489 as->flags = LB_AS_FLAGS_USED;
490 as->vip_index = vip_index;
491 pool_get(vip->as_indexes, as_index);
492 *as_index = as - lbm->ass;
495 * become a child of the FIB entry
496 * so we are informed when its forwarding changes
498 fib_prefix_t nh = {};
499 if (lb_vip_is_gre4(vip)) {
500 nh.fp_addr.ip4 = as->address.ip4;
502 nh.fp_proto = FIB_PROTOCOL_IP4;
504 nh.fp_addr.ip6 = as->address.ip6;
506 nh.fp_proto = FIB_PROTOCOL_IP6;
509 as->next_hop_fib_entry_index =
510 fib_table_entry_special_add(0,
513 FIB_ENTRY_FLAG_NONE);
514 as->next_hop_child_index =
515 fib_entry_child_add(as->next_hop_fib_entry_index,
521 vec_free(to_be_added);
524 lb_vip_update_new_flow_table(vip);
526 //Garbage collection maybe
527 lb_vip_garbage_collection(vip);
529 lb_put_writer_lock();
533 int lb_vip_del_ass_withlock(u32 vip_index, ip46_address_t *addresses, u32 n)
535 lb_main_t *lbm = &lb_main;
536 u32 now = (u32) vlib_time_now(vlib_get_main());
540 if (!(vip = lb_vip_get_by_index(vip_index))) {
541 return VNET_API_ERROR_NO_SUCH_ENTRY;
547 if (lb_as_find_index_vip(vip, &addresses[n], &i)) {
549 return VNET_API_ERROR_NO_SUCH_ENTRY;
552 if (n) { //Check for duplicates
555 if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] &&
556 addresses[n2].as_u64[1] == addresses[n].as_u64[1])
561 vec_add1(indexes, i);
566 //Garbage collection maybe
567 lb_vip_garbage_collection(vip);
569 if (indexes != NULL) {
570 vec_foreach(ip, indexes) {
571 lbm->ass[*ip].flags &= ~LB_AS_FLAGS_USED;
572 lbm->ass[*ip].last_used = now;
576 lb_vip_update_new_flow_table(vip);
583 int lb_vip_del_ass(u32 vip_index, ip46_address_t *addresses, u32 n)
585 lb_get_writer_lock();
586 int ret = lb_vip_del_ass_withlock(vip_index, addresses, n);
587 lb_put_writer_lock();
592 * Add the VIP adjacency to the ip4 or ip6 fib
594 static void lb_vip_add_adjacency(lb_main_t *lbm, lb_vip_t *vip)
596 dpo_proto_t proto = 0;
597 dpo_id_t dpo = DPO_INVALID;
598 fib_prefix_t pfx = {};
599 if (lb_vip_is_ip4(vip)) {
600 pfx.fp_addr.ip4 = vip->prefix.ip4;
601 pfx.fp_len = vip->plen - 96;
602 pfx.fp_proto = FIB_PROTOCOL_IP4;
603 proto = DPO_PROTO_IP4;
605 pfx.fp_addr.ip6 = vip->prefix.ip6;
606 pfx.fp_len = vip->plen;
607 pfx.fp_proto = FIB_PROTOCOL_IP6;
608 proto = DPO_PROTO_IP6;
610 dpo_set(&dpo, lb_vip_is_gre4(vip)?lbm->dpo_gre4_type:lbm->dpo_gre6_type,
611 proto, vip - lbm->vips);
612 fib_table_entry_special_dpo_add(0,
614 FIB_SOURCE_PLUGIN_HI,
615 FIB_ENTRY_FLAG_EXCLUSIVE,
621 * Deletes the adjacency associated with the VIP
623 static void lb_vip_del_adjacency(lb_main_t *lbm, lb_vip_t *vip)
625 fib_prefix_t pfx = {};
626 if (lb_vip_is_ip4(vip)) {
627 pfx.fp_addr.ip4 = vip->prefix.ip4;
628 pfx.fp_len = vip->plen - 96;
629 pfx.fp_proto = FIB_PROTOCOL_IP4;
631 pfx.fp_addr.ip6 = vip->prefix.ip6;
632 pfx.fp_len = vip->plen;
633 pfx.fp_proto = FIB_PROTOCOL_IP6;
635 fib_table_entry_special_remove(0, &pfx, FIB_SOURCE_PLUGIN_HI);
638 int lb_vip_add(ip46_address_t *prefix, u8 plen, lb_vip_type_t type, u32 new_length, u32 *vip_index)
640 lb_main_t *lbm = &lb_main;
642 lb_get_writer_lock();
643 ip46_prefix_normalize(prefix, plen);
645 if (!lb_vip_find_index_with_lock(prefix, plen, vip_index)) {
646 lb_put_writer_lock();
647 return VNET_API_ERROR_VALUE_EXIST;
650 if (!is_pow2(new_length)) {
651 lb_put_writer_lock();
652 return VNET_API_ERROR_INVALID_MEMORY_SIZE;
655 if (ip46_prefix_is_ip4(prefix, plen) &&
656 (type != LB_VIP_TYPE_IP4_GRE4) &&
657 (type != LB_VIP_TYPE_IP4_GRE6))
658 return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
662 pool_get(lbm->vips, vip);
665 vip->prefix = *prefix;
667 vip->last_garbage_collection = (u32) vlib_time_now(vlib_get_main());
669 vip->flags = LB_VIP_FLAGS_USED;
674 for (i = 0; i < LB_N_VIP_COUNTERS; i++) {
675 vlib_validate_simple_counter(&lbm->vip_counters[i], vip - lbm->vips);
676 vlib_zero_simple_counter(&lbm->vip_counters[i], vip - lbm->vips);
679 //Configure new flow table
680 vip->new_flow_table_mask = new_length - 1;
681 vip->new_flow_table = 0;
683 //Create a new flow hash table full of the default entry
684 lb_vip_update_new_flow_table(vip);
686 //Create adjacency to direct traffic
687 lb_vip_add_adjacency(lbm, vip);
690 *vip_index = vip - lbm->vips;
692 lb_put_writer_lock();
696 int lb_vip_del(u32 vip_index)
698 lb_main_t *lbm = &lb_main;
700 lb_get_writer_lock();
701 if (!(vip = lb_vip_get_by_index(vip_index))) {
702 lb_put_writer_lock();
703 return VNET_API_ERROR_NO_SUCH_ENTRY;
706 //FIXME: This operation is actually not working
707 //We will need to remove state before performing this.
711 ip46_address_t *ass = 0;
714 pool_foreach(as_index, vip->as_indexes, {
715 as = &lbm->ass[*as_index];
716 vec_add1(ass, as->address);
719 lb_vip_del_ass_withlock(vip_index, ass, vec_len(ass));
724 lb_vip_del_adjacency(lbm, vip);
726 //Set the VIP as unused
727 vip->flags &= ~LB_VIP_FLAGS_USED;
729 lb_put_writer_lock();
734 VLIB_PLUGIN_REGISTER () = {
735 .version = VPP_BUILD_VER,
736 .description = "Load Balancer",
740 u8 *format_lb_dpo (u8 * s, va_list * va)
742 index_t index = va_arg (*va, index_t);
743 CLIB_UNUSED(u32 indent) = va_arg (*va, u32);
744 lb_main_t *lbm = &lb_main;
745 lb_vip_t *vip = pool_elt_at_index (lbm->vips, index);
746 return format (s, "%U", format_lb_vip, vip);
749 static void lb_dpo_lock (dpo_id_t *dpo) {}
750 static void lb_dpo_unlock (dpo_id_t *dpo) {}
753 lb_fib_node_get_node (fib_node_index_t index)
755 lb_main_t *lbm = &lb_main;
756 lb_as_t *as = pool_elt_at_index (lbm->ass, index);
757 return (&as->fib_node);
761 lb_fib_node_last_lock_gone (fib_node_t *node)
766 lb_as_from_fib_node (fib_node_t *node)
768 return ((lb_as_t*)(((char*)node) -
769 STRUCT_OFFSET_OF(lb_as_t, fib_node)));
773 lb_as_stack (lb_as_t *as)
775 lb_main_t *lbm = &lb_main;
776 lb_vip_t *vip = &lbm->vips[as->vip_index];
777 dpo_stack(lb_vip_is_gre4(vip)?lbm->dpo_gre4_type:lbm->dpo_gre6_type,
778 lb_vip_is_ip4(vip)?DPO_PROTO_IP4:DPO_PROTO_IP6,
780 fib_entry_contribute_ip_forwarding(
781 as->next_hop_fib_entry_index));
784 static fib_node_back_walk_rc_t
785 lb_fib_node_back_walk_notify (fib_node_t *node,
786 fib_node_back_walk_ctx_t *ctx)
788 lb_as_stack(lb_as_from_fib_node(node));
789 return (FIB_NODE_BACK_WALK_CONTINUE);
793 lb_init (vlib_main_t * vm)
795 vlib_thread_main_t *tm = vlib_get_thread_main ();
796 lb_main_t *lbm = &lb_main;
798 fib_node_vft_t lb_fib_node_vft = {
799 .fnv_get = lb_fib_node_get_node,
800 .fnv_last_lock = lb_fib_node_last_lock_gone,
801 .fnv_back_walk = lb_fib_node_back_walk_notify,
804 .dv_lock = lb_dpo_lock,
805 .dv_unlock = lb_dpo_unlock,
806 .dv_format = format_lb_dpo,
811 vec_validate(lbm->per_cpu, tm->n_vlib_mains - 1);
812 lbm->writer_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
813 lbm->writer_lock[0] = 0;
814 lbm->per_cpu_sticky_buckets = LB_DEFAULT_PER_CPU_STICKY_BUCKETS;
815 lbm->flow_timeout = LB_DEFAULT_FLOW_TIMEOUT;
816 lbm->ip4_src_address.as_u32 = 0xffffffff;
817 lbm->ip6_src_address.as_u64[0] = 0xffffffffffffffffL;
818 lbm->ip6_src_address.as_u64[1] = 0xffffffffffffffffL;
819 lbm->dpo_gre4_type = dpo_register_new_type(&lb_vft, lb_dpo_gre4_nodes);
820 lbm->dpo_gre6_type = dpo_register_new_type(&lb_vft, lb_dpo_gre6_nodes);
821 lbm->fib_node_type = fib_node_register_new_type(&lb_fib_node_vft);
823 //Init AS reference counters
824 vlib_refcount_init(&lbm->as_refcount);
826 //Allocate and init default AS.
828 pool_get(lbm->ass, default_as);
829 default_as->flags = 0;
830 default_as->dpo.dpoi_next_node = LB_NEXT_DROP;
831 default_as->vip_index = ~0;
832 default_as->address.ip6.as_u64[0] = 0xffffffffffffffffL;
833 default_as->address.ip6.as_u64[1] = 0xffffffffffffffffL;
835 #define _(a,b,c) lbm->vip_counters[c].name = b;
836 lb_foreach_vip_counter
841 VLIB_INIT_FUNCTION (lb_init);