FD.io VPP  v20.01-48-g3e0dafb74
Vector Packet Processing
load_balance.c
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1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 
16 #include <vnet/ip/lookup.h>
17 #include <vnet/dpo/load_balance.h>
19 #include <vnet/dpo/drop_dpo.h>
20 #include <vppinfra/math.h> /* for fabs */
21 #include <vnet/adj/adj.h>
22 #include <vnet/adj/adj_internal.h>
23 #include <vnet/fib/fib_urpf_list.h>
24 #include <vnet/bier/bier_fwd.h>
25 #include <vnet/fib/mpls_fib.h>
26 
27 /*
28  * distribution error tolerance for load-balancing
29  */
31 
33 
34 /**
35  * the logger
36  */
38 
39 #define LB_DBG(_lb, _fmt, _args...) \
40 { \
41  vlib_log_debug(load_balance_logger, \
42  "lb:[%U]:" _fmt, \
43  format_load_balance, load_balance_get_index(_lb), \
44  LOAD_BALANCE_FORMAT_NONE, \
45  ##_args); \
46 }
47 
48 /**
49  * Pool of all DPOs. It's not static so the DP can have fast access
50  */
52 
53 /**
54  * The one instance of load-balance main
55  */
56 load_balance_main_t load_balance_main = {
57  .lbm_to_counters = {
58  .name = "route-to",
59  .stat_segment_name = "/net/route/to",
60  },
61  .lbm_via_counters = {
62  .name = "route-via",
63  .stat_segment_name = "/net/route/via",
64  }
65 };
66 
67 f64
69 {
71 }
72 
73 static inline index_t
75 {
76  return (lb - load_balance_pool);
77 }
78 
79 static inline dpo_id_t*
81 {
82  if (LB_HAS_INLINE_BUCKETS(lb))
83  {
84  return (lb->lb_buckets_inline);
85  }
86  else
87  {
88  return (lb->lb_buckets);
89  }
90 }
91 
92 static load_balance_t *
94 {
95  load_balance_t *lb;
96 
97  pool_get_aligned(load_balance_pool, lb, CLIB_CACHE_LINE_BYTES);
98  clib_memset(lb, 0, sizeof(*lb));
99 
100  lb->lb_map = INDEX_INVALID;
101  lb->lb_urpf = INDEX_INVALID;
102  vlib_validate_combined_counter(&(load_balance_main.lbm_to_counters),
106  vlib_zero_combined_counter(&(load_balance_main.lbm_to_counters),
108  vlib_zero_combined_counter(&(load_balance_main.lbm_via_counters),
110 
111  return (lb);
112 }
113 
114 static u8*
117  u32 indent,
118  u8 *s)
119 {
120  vlib_counter_t to, via;
121  load_balance_t *lb;
122  dpo_id_t *buckets;
123  u32 i;
124 
125  lb = load_balance_get(lbi);
126  vlib_get_combined_counter(&(load_balance_main.lbm_to_counters), lbi, &to);
127  vlib_get_combined_counter(&(load_balance_main.lbm_via_counters), lbi, &via);
128  buckets = load_balance_get_buckets(lb);
129 
130  s = format(s, "%U: ", format_dpo_type, DPO_LOAD_BALANCE);
131  s = format(s, "[proto:%U ", format_dpo_proto, lb->lb_proto);
132  s = format(s, "index:%d buckets:%d ", lbi, lb->lb_n_buckets);
133  s = format(s, "uRPF:%d ", lb->lb_urpf);
134  if (lb->lb_flags)
135  {
136  load_balance_attr_t attr;
137 
138  s = format(s, "flags:[");
139 
141  {
142  if (lb->lb_flags & (1 << attr))
143  {
144  s = format (s, "%s", load_balance_attr_names[attr]);
145  }
146  }
147  s = format(s, "] ");
148  }
149  s = format(s, "to:[%Ld:%Ld]", to.packets, to.bytes);
150  if (0 != via.packets)
151  {
152  s = format(s, " via:[%Ld:%Ld]",
153  via.packets, via.bytes);
154  }
155  s = format(s, "]");
156 
157  if (INDEX_INVALID != lb->lb_map)
158  {
159  s = format(s, "\n%U%U",
160  format_white_space, indent+4,
161  format_load_balance_map, lb->lb_map, indent+4);
162  }
163  for (i = 0; i < lb->lb_n_buckets; i++)
164  {
165  s = format(s, "\n%U[%d] %U",
166  format_white_space, indent+2,
167  i,
169  &buckets[i], indent+6);
170  }
171  return (s);
172 }
173 
174 u8*
175 format_load_balance (u8 * s, va_list * args)
176 {
177  index_t lbi = va_arg(*args, index_t);
179 
180  return (load_balance_format(lbi, flags, 0, s));
181 }
182 
183 static u8*
184 format_load_balance_dpo (u8 * s, va_list * args)
185 {
186  index_t lbi = va_arg(*args, index_t);
187  u32 indent = va_arg(*args, u32);
188 
189  return (load_balance_format(lbi, LOAD_BALANCE_FORMAT_DETAIL, indent, s));
190 }
191 
194 {
195  switch (lb_proto)
196  {
197  case DPO_PROTO_IP4:
198  case DPO_PROTO_IP6:
199  return (IP_FLOW_HASH_DEFAULT);
200 
201  case DPO_PROTO_MPLS:
202  return (MPLS_FLOW_HASH_DEFAULT);
203 
204  case DPO_PROTO_ETHERNET:
205  case DPO_PROTO_BIER:
206  case DPO_PROTO_NSH:
207  break;
208  }
209 
210  return (0);
211 }
212 
213 static load_balance_t *
215  dpo_proto_t lb_proto,
216  flow_hash_config_t fhc)
217 {
218  load_balance_t *lb;
219 
220  lb = load_balance_alloc_i();
221  lb->lb_hash_config = fhc;
222  lb->lb_n_buckets = num_buckets;
223  lb->lb_n_buckets_minus_1 = num_buckets-1;
224  lb->lb_proto = lb_proto;
225 
226  if (!LB_HAS_INLINE_BUCKETS(lb))
227  {
229  lb->lb_n_buckets - 1,
231  }
232 
233  LB_DBG(lb, "create");
234 
235  return (lb);
236 }
237 
238 index_t
240  dpo_proto_t lb_proto,
241  flow_hash_config_t fhc)
242 {
243  return (load_balance_get_index(load_balance_create_i(n_buckets, lb_proto, fhc)));
244 }
245 
246 static inline void
248  u32 bucket,
249  dpo_id_t *buckets,
250  const dpo_id_t *next)
251 {
252  dpo_stack(DPO_LOAD_BALANCE, lb->lb_proto, &buckets[bucket], next);
253 }
254 
255 void
257  u32 bucket,
258  const dpo_id_t *next)
259 {
260  load_balance_t *lb;
261  dpo_id_t *buckets;
262 
263  lb = load_balance_get(lbi);
264  buckets = load_balance_get_buckets(lb);
265 
266  ASSERT(bucket < lb->lb_n_buckets);
267 
268  load_balance_set_bucket_i(lb, bucket, buckets, next);
269 }
270 
271 int
273 {
274  load_balance_t *lb;
275 
276  if (DPO_LOAD_BALANCE != dpo->dpoi_type)
277  return (0);
278 
279  lb = load_balance_get(dpo->dpoi_index);
280 
281  if (1 == lb->lb_n_buckets)
282  {
283  return (dpo_is_drop(load_balance_get_bucket_i(lb, 0)));
284  }
285  return (0);
286 }
287 
288 u16
290 {
291  load_balance_t *lb;
292 
293  lb = load_balance_get(lbi);
294 
295  return (lb->lb_n_buckets);
296 }
297 
298 void
301 {
302  load_balance_t *lb;
303 
304  lb = load_balance_get(lbi);
306 }
307 
308 
309 void
311  index_t urpf)
312 {
313  load_balance_t *lb;
314  index_t old;
315 
316  lb = load_balance_get(lbi);
317 
318  /*
319  * packets in flight we see this change. but it's atomic, so :P
320  */
321  old = lb->lb_urpf;
322  lb->lb_urpf = urpf;
323 
325  fib_urpf_list_lock(urpf);
326 }
327 
328 index_t
330 {
331  load_balance_t *lb;
332 
333  lb = load_balance_get(lbi);
334 
335  return (lb->lb_urpf);
336 }
337 
338 const dpo_id_t *
340  u32 bucket)
341 {
342  load_balance_t *lb;
343 
344  lb = load_balance_get(lbi);
345 
346  return (load_balance_get_bucket_i(lb, bucket));
347 }
348 
349 static int
351  const load_balance_path_t * n2)
352 {
353  return ((int) n1->path_weight - (int) n2->path_weight);
354 }
355 
356 /* Given next hop vector is over-written with normalized one with sorted weights and
357  with weights corresponding to the number of adjacencies for each next hop.
358  Returns number of adjacencies in block. */
359 u32
361  load_balance_path_t ** normalized_next_hops,
362  u32 *sum_weight_in,
364 {
366  uword n_nhs, n_adj, n_adj_left, i, sum_weight;
367  f64 norm, error;
368 
369  n_nhs = vec_len (raw_next_hops);
370  ASSERT (n_nhs > 0);
371  if (n_nhs == 0)
372  return 0;
373 
374  /* Allocate enough space for 2 copies; we'll use second copy to save original weights. */
375  nhs = *normalized_next_hops;
376  vec_validate (nhs, 2*n_nhs - 1);
377 
378  /* Fast path: 1 next hop in block. */
379  n_adj = n_nhs;
380  if (n_nhs == 1)
381  {
382  nhs[0] = raw_next_hops[0];
383  nhs[0].path_weight = 1;
384  _vec_len (nhs) = 1;
385  sum_weight = 1;
386  goto done;
387  }
388 
389  else if (n_nhs == 2)
390  {
391  int cmp = next_hop_sort_by_weight (&raw_next_hops[0], &raw_next_hops[1]) < 0;
392 
393  /* Fast sort. */
394  nhs[0] = raw_next_hops[cmp];
395  nhs[1] = raw_next_hops[cmp ^ 1];
396 
397  /* Fast path: equal cost multipath with 2 next hops. */
398  if (nhs[0].path_weight == nhs[1].path_weight)
399  {
400  nhs[0].path_weight = nhs[1].path_weight = 1;
401  _vec_len (nhs) = 2;
402  sum_weight = 2;
403  goto done;
404  }
405  }
406  else
407  {
408  clib_memcpy_fast (nhs, raw_next_hops, n_nhs * sizeof (raw_next_hops[0]));
409  qsort (nhs, n_nhs, sizeof (nhs[0]), (void *) next_hop_sort_by_weight);
410  }
411 
412  /* Find total weight to normalize weights. */
413  sum_weight = 0;
414  for (i = 0; i < n_nhs; i++)
415  sum_weight += nhs[i].path_weight;
416 
417  /* In the unlikely case that all weights are given as 0, set them all to 1. */
418  if (sum_weight == 0)
419  {
420  for (i = 0; i < n_nhs; i++)
421  nhs[i].path_weight = 1;
422  sum_weight = n_nhs;
423  }
424 
425  /* Save copies of all next hop weights to avoid being overwritten in loop below. */
426  for (i = 0; i < n_nhs; i++)
427  nhs[n_nhs + i].path_weight = nhs[i].path_weight;
428 
429  /* Try larger and larger power of 2 sized adjacency blocks until we
430  find one where traffic flows to within 1% of specified weights. */
431  for (n_adj = max_pow2 (n_nhs); ; n_adj *= 2)
432  {
433  error = 0;
434 
435  norm = n_adj / ((f64) sum_weight);
436  n_adj_left = n_adj;
437  for (i = 0; i < n_nhs; i++)
438  {
439  f64 nf = nhs[n_nhs + i].path_weight * norm; /* use saved weights */
440  word n = flt_round_nearest (nf);
441 
442  n = n > n_adj_left ? n_adj_left : n;
443  n_adj_left -= n;
444  error += fabs (nf - n);
445  nhs[i].path_weight = n;
446 
447  if (0 == nhs[i].path_weight)
448  {
449  /*
450  * when the weight skew is high (norm is small) and n == nf.
451  * without this correction the path with a low weight would have
452  * no representation in the load-balanace - don't want that.
453  * If the weight skew is high so the load-balance has many buckets
454  * to allow it. pays ya money takes ya choice.
455  */
456  error = n_adj;
457  break;
458  }
459  }
460 
461  nhs[0].path_weight += n_adj_left;
462 
463  /* Less than 5% average error per adjacency with this size adjacency block? */
464  if (error <= multipath_next_hop_error_tolerance*n_adj)
465  {
466  /* Truncate any next hops with zero weight. */
467  _vec_len (nhs) = i;
468  break;
469  }
470  }
471 
472 done:
473  /* Save vector for next call. */
474  *normalized_next_hops = nhs;
475  *sum_weight_in = sum_weight;
476  return n_adj;
477 }
478 
479 static load_balance_path_t *
481  dpo_proto_t drop_proto)
482 {
483  if (0 == vec_len(nhs))
484  {
485  load_balance_path_t *new_nhs = NULL, *nh;
486 
487  /*
488  * we need something for the load-balance. so use the drop
489  */
490  vec_add2(new_nhs, nh, 1);
491 
492  nh->path_weight = 1;
493  dpo_copy(&nh->path_dpo, drop_dpo_get(drop_proto));
494 
495  return (new_nhs);
496  }
497 
498  return (NULL);
499 }
500 
501 /*
502  * Fill in adjacencies in block based on corresponding
503  * next hop adjacencies.
504  */
505 static void
508  dpo_id_t *buckets,
509  u32 n_buckets)
510 {
512  u16 ii, bucket;
513 
514  bucket = 0;
515 
516  /*
517  * the next-hops have normalised weights. that means their sum is the number
518  * of buckets we need to fill.
519  */
520  vec_foreach (nh, nhs)
521  {
522  for (ii = 0; ii < nh->path_weight; ii++)
523  {
524  ASSERT(bucket < n_buckets);
525  load_balance_set_bucket_i(lb, bucket++, buckets, &nh->path_dpo);
526  }
527  }
528 }
529 static void
532  dpo_id_t *buckets,
533  u32 n_buckets)
534 {
535  load_balance_path_t *nh, *fwding_paths;
536  u16 ii, bucket, fpath;
537 
538  fpath = bucket = 0;
539  fwding_paths = NULL;
540 
541  vec_foreach (nh, nhs)
542  {
543  if (!dpo_is_drop(&nh->path_dpo))
544  {
545  vec_add1(fwding_paths, *nh);
546  }
547  }
548  if (vec_len(fwding_paths) == 0)
549  fwding_paths = vec_dup(nhs);
550 
551  /*
552  * the next-hops have normalised weights. that means their sum is the number
553  * of buckets we need to fill.
554  */
555  vec_foreach (nh, nhs)
556  {
557  for (ii = 0; ii < nh->path_weight; ii++)
558  {
559  ASSERT(bucket < n_buckets);
560  if (!dpo_is_drop(&nh->path_dpo))
561  {
562  load_balance_set_bucket_i(lb, bucket++, buckets, &nh->path_dpo);
563  }
564  else
565  {
566  /* fill the bucks from the next up path */
567  load_balance_set_bucket_i(lb, bucket++, buckets, &fwding_paths[fpath].path_dpo);
568  fpath = (fpath + 1) % vec_len(fwding_paths);
569  }
570  }
571  }
572 
573  vec_free(fwding_paths);
574 }
575 
576 static void
579  dpo_id_t *buckets,
580  u32 n_buckets,
582 {
583  if (flags & LOAD_BALANCE_FLAG_STICKY)
584  {
585  load_balance_fill_buckets_sticky(lb, nhs, buckets, n_buckets);
586  }
587  else
588  {
589  load_balance_fill_buckets_norm(lb, nhs, buckets, n_buckets);
590  }
591 }
592 
593 static inline void
595  u32 n_buckets)
596 {
597  lb->lb_n_buckets = n_buckets;
598  lb->lb_n_buckets_minus_1 = n_buckets-1;
599 }
600 
601 void
603  const load_balance_path_t * raw_nhs,
605 {
606  load_balance_path_t *nh, *nhs, *fixed_nhs;
607  u32 sum_of_weights, n_buckets, ii;
608  index_t lbmi, old_lbmi;
609  load_balance_t *lb;
610  dpo_id_t *tmp_dpo;
611 
612  nhs = NULL;
613 
615  lb = load_balance_get(dpo->dpoi_index);
616  lb->lb_flags = flags;
617  fixed_nhs = load_balance_multipath_next_hop_fixup(raw_nhs, lb->lb_proto);
618  n_buckets =
619  ip_multipath_normalize_next_hops((NULL == fixed_nhs ?
620  raw_nhs :
621  fixed_nhs),
622  &nhs,
623  &sum_of_weights,
625 
626  ASSERT (n_buckets >= vec_len (raw_nhs));
627 
628  /*
629  * Save the old load-balance map used, and get a new one if required.
630  */
631  old_lbmi = lb->lb_map;
632  if (flags & LOAD_BALANCE_FLAG_USES_MAP)
633  {
634  lbmi = load_balance_map_add_or_lock(n_buckets, sum_of_weights, nhs);
635  }
636  else
637  {
638  lbmi = INDEX_INVALID;
639  }
640 
641  if (0 == lb->lb_n_buckets)
642  {
643  /*
644  * first time initialisation. no packets inflight, so we can write
645  * at leisure.
646  */
647  load_balance_set_n_buckets(lb, n_buckets);
648 
649  if (!LB_HAS_INLINE_BUCKETS(lb))
651  lb->lb_n_buckets - 1,
653 
656  n_buckets, flags);
657  lb->lb_map = lbmi;
658  }
659  else
660  {
661  /*
662  * This is a modification of an existing load-balance.
663  * We need to ensure that packets inflight see a consistent state, that
664  * is the number of reported buckets the LB has (read from
665  * lb_n_buckets_minus_1) is not more than it actually has. So if the
666  * number of buckets is increasing, we must update the bucket array first,
667  * then the reported number. vice-versa if the number of buckets goes down.
668  */
669  if (n_buckets == lb->lb_n_buckets)
670  {
671  /*
672  * no change in the number of buckets. we can simply fill what
673  * is new over what is old.
674  */
677  n_buckets, flags);
678  lb->lb_map = lbmi;
679  }
680  else if (n_buckets > lb->lb_n_buckets)
681  {
682  /*
683  * we have more buckets. the old load-balance map (if there is one)
684  * will remain valid, i.e. mapping to indices within range, so we
685  * update it last.
686  */
687  if (n_buckets > LB_NUM_INLINE_BUCKETS &&
689  {
690  /*
691  * the new increased number of buckets is crossing the threshold
692  * from the inline storage to out-line. Alloc the outline buckets
693  * first, then fixup the number. then reset the inlines.
694  */
695  ASSERT(NULL == lb->lb_buckets);
697  n_buckets - 1,
699 
701  lb->lb_buckets,
702  n_buckets, flags);
704  load_balance_set_n_buckets(lb, n_buckets);
705 
707 
708  for (ii = 0; ii < LB_NUM_INLINE_BUCKETS; ii++)
709  {
710  dpo_reset(&lb->lb_buckets_inline[ii]);
711  }
712  }
713  else
714  {
715  if (n_buckets <= LB_NUM_INLINE_BUCKETS)
716  {
717  /*
718  * we are not crossing the threshold and it's still inline buckets.
719  * we can write the new on the old..
720  */
723  n_buckets, flags);
725  load_balance_set_n_buckets(lb, n_buckets);
726  }
727  else
728  {
729  /*
730  * we are not crossing the threshold. We need a new bucket array to
731  * hold the increased number of choices.
732  */
733  dpo_id_t *new_buckets, *old_buckets, *tmp_dpo;
734 
735  new_buckets = NULL;
736  old_buckets = load_balance_get_buckets(lb);
737 
738  vec_validate_aligned(new_buckets,
739  n_buckets - 1,
741 
742  load_balance_fill_buckets(lb, nhs, new_buckets,
743  n_buckets, flags);
745  lb->lb_buckets = new_buckets;
747  load_balance_set_n_buckets(lb, n_buckets);
748 
749  vec_foreach(tmp_dpo, old_buckets)
750  {
751  dpo_reset(tmp_dpo);
752  }
753  vec_free(old_buckets);
754  }
755  }
756 
757  /*
758  * buckets fixed. ready for the MAP update.
759  */
760  lb->lb_map = lbmi;
761  }
762  else
763  {
764  /*
765  * bucket size shrinkage.
766  * Any map we have will be based on the old
767  * larger number of buckets, so will be translating to indices
768  * out of range. So the new MAP must be installed first.
769  */
770  lb->lb_map = lbmi;
772 
773 
774  if (n_buckets <= LB_NUM_INLINE_BUCKETS &&
776  {
777  /*
778  * the new decreased number of buckets is crossing the threshold
779  * from out-line storage to inline:
780  * 1 - Fill the inline buckets,
781  * 2 - fixup the number (and this point the inline buckets are
782  * used).
783  * 3 - free the outline buckets
784  */
786  lb->lb_buckets_inline,
787  n_buckets, flags);
789  load_balance_set_n_buckets(lb, n_buckets);
791 
792  vec_foreach(tmp_dpo, lb->lb_buckets)
793  {
794  dpo_reset(tmp_dpo);
795  }
796  vec_free(lb->lb_buckets);
797  }
798  else
799  {
800  /*
801  * not crossing the threshold.
802  * 1 - update the number to the smaller size
803  * 2 - write the new buckets
804  * 3 - reset those no longer used.
805  */
806  dpo_id_t *buckets;
807  u32 old_n_buckets;
808 
809  old_n_buckets = lb->lb_n_buckets;
810  buckets = load_balance_get_buckets(lb);
811 
812  load_balance_set_n_buckets(lb, n_buckets);
814 
815  load_balance_fill_buckets(lb, nhs, buckets,
816  n_buckets, flags);
817 
818  for (ii = n_buckets; ii < old_n_buckets; ii++)
819  {
820  dpo_reset(&buckets[ii]);
821  }
822  }
823  }
824  }
825 
826  vec_foreach (nh, nhs)
827  {
828  dpo_reset(&nh->path_dpo);
829  }
830  vec_free(nhs);
831  vec_free(fixed_nhs);
832 
833  load_balance_map_unlock(old_lbmi);
834 }
835 
836 static void
838 {
839  load_balance_t *lb;
840 
841  lb = load_balance_get(dpo->dpoi_index);
842 
843  lb->lb_locks++;
844 }
845 
846 static void
848 {
849  dpo_id_t *buckets;
850  int i;
851 
852  buckets = load_balance_get_buckets(lb);
853 
854  for (i = 0; i < lb->lb_n_buckets; i++)
855  {
856  dpo_reset(&buckets[i]);
857  }
858 
859  LB_DBG(lb, "destroy");
860  if (!LB_HAS_INLINE_BUCKETS(lb))
861  {
862  vec_free(lb->lb_buckets);
863  }
864 
867 
868  pool_put(load_balance_pool, lb);
869 }
870 
871 static void
873 {
874  load_balance_t *lb;
875 
876  lb = load_balance_get(dpo->dpoi_index);
877 
878  lb->lb_locks--;
879 
880  if (0 == lb->lb_locks)
881  {
883  }
884 }
885 
886 static void
888 {
889  fib_show_memory_usage("load-balance",
890  pool_elts(load_balance_pool),
891  pool_len(load_balance_pool),
892  sizeof(load_balance_t));
894 }
895 
896 const static dpo_vft_t lb_vft = {
898  .dv_unlock = load_balance_unlock,
899  .dv_format = format_load_balance_dpo,
900  .dv_mem_show = load_balance_mem_show,
901 };
902 
903 /**
904  * @brief The per-protocol VLIB graph nodes that are assigned to a load-balance
905  * object.
906  *
907  * this means that these graph nodes are ones from which a load-balance is the
908  * parent object in the DPO-graph.
909  *
910  * We do not list all the load-balance nodes, such as the *-lookup. instead
911  * we are relying on the correct use of the .sibling_of field when setting
912  * up these sibling nodes.
913  */
914 const static char* const load_balance_ip4_nodes[] =
915 {
916  "ip4-load-balance",
917  NULL,
918 };
919 const static char* const load_balance_ip6_nodes[] =
920 {
921  "ip6-load-balance",
922  NULL,
923 };
924 const static char* const load_balance_mpls_nodes[] =
925 {
926  "mpls-load-balance",
927  NULL,
928 };
929 const static char* const load_balance_l2_nodes[] =
930 {
931  "l2-load-balance",
932  NULL,
933 };
934 const static char* const load_balance_nsh_nodes[] =
935 {
936  "nsh-load-balance",
937  NULL
938 };
939 const static char* const load_balance_bier_nodes[] =
940 {
941  "bier-load-balance",
942  NULL,
943 };
944 const static char* const * const load_balance_nodes[DPO_PROTO_NUM] =
945 {
952 };
953 
954 void
956 {
957  index_t lbi;
958 
960 
961  /*
962  * Special LB with index zero. we need to define this since the v4 mtrie
963  * assumes an index of 0 implies the ply is empty. therefore all 'real'
964  * adjs need a non-zero index.
965  * This should never be used, but just in case, stack it on a drop.
966  */
967  lbi = load_balance_create(1, DPO_PROTO_IP4, 0);
969 
971  vlib_log_register_class("dpo", "load-balance");
972 
974 }
975 
976 static clib_error_t *
978  unformat_input_t * input,
979  vlib_cli_command_t * cmd)
980 {
981  index_t lbi = INDEX_INVALID;
982 
984  {
985  if (unformat (input, "%d", &lbi))
986  ;
987  else
988  break;
989  }
990 
991  if (INDEX_INVALID != lbi)
992  {
993  if (pool_is_free_index(load_balance_pool, lbi))
994  {
995  vlib_cli_output (vm, "no such load-balance:%d", lbi);
996  }
997  else
998  {
999  vlib_cli_output (vm, "%U", format_load_balance, lbi,
1001  }
1002  }
1003  else
1004  {
1005  load_balance_t *lb;
1006 
1007  pool_foreach(lb, load_balance_pool,
1008  ({
1012  }));
1013  }
1014 
1015  return 0;
1016 }
1017 
1018 VLIB_CLI_COMMAND (load_balance_show_command, static) = {
1019  .path = "show load-balance",
1020  .short_help = "show load-balance [<index>]",
1021  .function = load_balance_show,
1022 };
1023 
1024 
1027 {
1028  ip4_header_t *iph = (ip4_header_t *) data;
1029 
1030  if ((iph->ip_version_and_header_length & 0xF0) == 0x40)
1032  else
1034 }
1035 
1038 {
1039  return (*((u64 *) m) & 0xffffffffffff);
1040 }
1041 
1044 {
1045  ethernet_header_t *eh;
1046  u64 a, b, c;
1047  uword is_ip, eh_size;
1048  u16 eh_type;
1049 
1050  eh = vlib_buffer_get_current (b0);
1051  eh_type = clib_net_to_host_u16 (eh->type);
1052  eh_size = ethernet_buffer_header_size (b0);
1053 
1054  is_ip = (eh_type == ETHERNET_TYPE_IP4 || eh_type == ETHERNET_TYPE_IP6);
1055 
1056  /* since we have 2 cache lines, use them */
1057  if (is_ip)
1058  a = ip_flow_hash ((u8 *) vlib_buffer_get_current (b0) + eh_size);
1059  else
1060  a = eh->type;
1061 
1062  b = mac_to_u64 ((u8 *) eh->dst_address);
1063  c = mac_to_u64 ((u8 *) eh->src_address);
1064  hash_mix64 (a, b, c);
1065 
1066  return (u32) c;
1067 }
1068 
1070 {
1073 
1077  vlib_frame_t * frame,
1078  int is_l2)
1079 {
1080  u32 n_left_from, next_index, *from, *to_next;
1081 
1082  from = vlib_frame_vector_args (frame);
1083  n_left_from = frame->n_vectors;
1084 
1085  next_index = node->cached_next_index;
1086 
1087  while (n_left_from > 0)
1088  {
1089  u32 n_left_to_next;
1090 
1091  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1092 
1093  while (n_left_from > 0 && n_left_to_next > 0)
1094  {
1095  vlib_buffer_t *b0;
1096  u32 bi0, lbi0, next0;
1097  const dpo_id_t *dpo0;
1098  const load_balance_t *lb0;
1099 
1100  bi0 = from[0];
1101  to_next[0] = bi0;
1102  from += 1;
1103  to_next += 1;
1104  n_left_from -= 1;
1105  n_left_to_next -= 1;
1106 
1107  b0 = vlib_get_buffer (vm, bi0);
1108 
1109  /* lookup dst + src mac */
1110  lbi0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
1111  lb0 = load_balance_get(lbi0);
1112 
1113  if (is_l2)
1114  {
1115  vnet_buffer(b0)->ip.flow_hash = l2_flow_hash(b0);
1116  }
1117  else
1118  {
1119  /* it's BIER */
1120  const bier_hdr_t *bh0 = vlib_buffer_get_current(b0);
1121  vnet_buffer(b0)->ip.flow_hash = bier_compute_flow_hash(bh0);
1122  }
1123 
1124  dpo0 = load_balance_get_bucket_i(lb0,
1125  vnet_buffer(b0)->ip.flow_hash &
1126  (lb0->lb_n_buckets_minus_1));
1127 
1128  next0 = dpo0->dpoi_next_node;
1129  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
1130 
1131  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1132  {
1133  load_balance_trace_t *tr = vlib_add_trace (vm, node, b0,
1134  sizeof (*tr));
1135  tr->lb_index = lbi0;
1136  }
1137  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1138  n_left_to_next, bi0, next0);
1139  }
1140 
1141  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1142  }
1143 
1144  return frame->n_vectors;
1145 }
1146 
1147 static uword
1150  vlib_frame_t * frame)
1151 {
1152  return (load_balance_inline(vm, node, frame, 1));
1153 }
1154 
1155 static u8 *
1156 format_l2_load_balance_trace (u8 * s, va_list * args)
1157 {
1158  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1159  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1160  load_balance_trace_t *t = va_arg (*args, load_balance_trace_t *);
1161 
1162  s = format (s, "L2-load-balance: index %d", t->lb_index);
1163  return s;
1164 }
1165 
1166 /**
1167  * @brief
1168  */
1170  .function = l2_load_balance,
1171  .name = "l2-load-balance",
1172  .vector_size = sizeof (u32),
1173 
1174  .format_trace = format_l2_load_balance_trace,
1175  .n_next_nodes = 1,
1176  .next_nodes = {
1177  [0] = "error-drop",
1178  },
1179 };
1180 
1181 static uword
1184  vlib_frame_t * frame)
1185 {
1186  u32 n_left_from, next_index, *from, *to_next;
1187 
1188  from = vlib_frame_vector_args (frame);
1189  n_left_from = frame->n_vectors;
1190 
1191  next_index = node->cached_next_index;
1192 
1193  while (n_left_from > 0)
1194  {
1195  u32 n_left_to_next;
1196 
1197  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1198 
1199  while (n_left_from > 0 && n_left_to_next > 0)
1200  {
1201  vlib_buffer_t *b0;
1202  u32 bi0, lbi0, next0, *nsh0;
1203  const dpo_id_t *dpo0;
1204  const load_balance_t *lb0;
1205 
1206  bi0 = from[0];
1207  to_next[0] = bi0;
1208  from += 1;
1209  to_next += 1;
1210  n_left_from -= 1;
1211  n_left_to_next -= 1;
1212 
1213  b0 = vlib_get_buffer (vm, bi0);
1214 
1215  lbi0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
1216  lb0 = load_balance_get(lbi0);
1217 
1218  /* SPI + SI are the second word of the NSH header */
1219  nsh0 = vlib_buffer_get_current (b0);
1220  vnet_buffer(b0)->ip.flow_hash = nsh0[1] % lb0->lb_n_buckets;
1221 
1222  dpo0 = load_balance_get_bucket_i(lb0,
1223  vnet_buffer(b0)->ip.flow_hash &
1224  (lb0->lb_n_buckets_minus_1));
1225 
1226  next0 = dpo0->dpoi_next_node;
1227  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
1228 
1229  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1230  {
1231  load_balance_trace_t *tr = vlib_add_trace (vm, node, b0,
1232  sizeof (*tr));
1233  tr->lb_index = lbi0;
1234  }
1235  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1236  n_left_to_next, bi0, next0);
1237  }
1238 
1239  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1240  }
1241 
1242  return frame->n_vectors;
1243 }
1244 
1245 static u8 *
1246 format_nsh_load_balance_trace (u8 * s, va_list * args)
1247 {
1248  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1249  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1250  load_balance_trace_t *t = va_arg (*args, load_balance_trace_t *);
1251 
1252  s = format (s, "NSH-load-balance: index %d", t->lb_index);
1253  return s;
1254 }
1255 
1256 /**
1257  * @brief
1258  */
1260  .function = nsh_load_balance,
1261  .name = "nsh-load-balance",
1262  .vector_size = sizeof (u32),
1263 
1264  .format_trace = format_nsh_load_balance_trace,
1265  .n_next_nodes = 1,
1266  .next_nodes = {
1267  [0] = "error-drop",
1268  },
1269 };
1270 
1271 static u8 *
1272 format_bier_load_balance_trace (u8 * s, va_list * args)
1273 {
1274  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1275  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1276  load_balance_trace_t *t = va_arg (*args, load_balance_trace_t *);
1277 
1278  s = format (s, "BIER-load-balance: index %d", t->lb_index);
1279  return s;
1280 }
1281 
1282 static uword
1285  vlib_frame_t * frame)
1286 {
1287  return (load_balance_inline(vm, node, frame, 0));
1288 }
1289 
1290 /**
1291  * @brief
1292  */
1294  .function = bier_load_balance,
1295  .name = "bier-load-balance",
1296  .vector_size = sizeof (u32),
1297 
1298  .format_trace = format_bier_load_balance_trace,
1299  .sibling_of = "mpls-load-balance",
1300 };
vlib_log_class_t vlib_log_register_class(char *class, char *subclass)
Definition: log.c:176
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:440
u16 lb_n_buckets
number of buckets in the load-balance.
Definition: load_balance.h:116
vlib_log_class_t load_balance_logger
the logger
Definition: load_balance.c:37
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:124
static const char *const load_balance_ip6_nodes[]
Definition: load_balance.c:919
dpo_id_t * lb_buckets
Vector of buckets containing the next DPOs, sized as lbo_num.
Definition: load_balance.h:166
dpo_lock_fn_t dv_lock
A reference counting lock function.
Definition: dpo.h:406
static u8 * format_l2_load_balance_trace(u8 *s, va_list *args)
void load_balance_map_unlock(index_t lbmi)
vlib_combined_counter_main_t lbm_to_counters
Definition: load_balance.h:46
index_t load_balance_map_add_or_lock(u32 n_buckets, u32 sum_of_weights, const load_balance_path_t *paths)
fib_entry_flag_t lb_fib_entry_flags
Flags from the load-balance&#39;s associated fib_entry_t.
Definition: load_balance.h:138
static index_t load_balance_get_index(const load_balance_t *lb)
Definition: load_balance.c:74
static const char *const *const load_balance_nodes[DPO_PROTO_NUM]
Definition: load_balance.c:944
#define CLIB_UNUSED(x)
Definition: clib.h:82
A virtual function table regisitered for a DPO type.
Definition: dpo.h:401
static const char *const load_balance_mpls_nodes[]
Definition: load_balance.c:924
void vlib_validate_combined_counter(vlib_combined_counter_main_t *cm, u32 index)
validate a combined counter
Definition: counter.c:94
u16 load_balance_n_buckets(index_t lbi)
Definition: load_balance.c:289
a
Definition: bitmap.h:538
u8 * format_dpo_type(u8 *s, va_list *args)
format a DPO type
Definition: dpo.c:138
dpo_id_t path_dpo
ID of the Data-path object.
Definition: load_balance.h:66
static void load_balance_set_n_buckets(load_balance_t *lb, u32 n_buckets)
Definition: load_balance.c:594
vl_api_fib_path_nh_t nh
Definition: fib_types.api:126
#define LOAD_BALANCE_ATTR_NAMES
Definition: load_balance.h:87
static u32 ip_flow_hash(void *data)
unsigned long u64
Definition: types.h:89
enum load_balance_format_flags_t_ load_balance_format_flags_t
Flags controlling load-balance formatting/display.
Definitions for all things IP (v4|v6) unicast and multicast lookup related.
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
#define NULL
Definition: clib.h:58
static u32 ip4_compute_flow_hash(const ip4_header_t *ip, flow_hash_config_t flow_hash_config)
Definition: ip4.h:304
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
void load_balance_set_urpf(index_t lbi, index_t urpf)
Definition: load_balance.c:310
#define ethernet_buffer_header_size(b)
Determine the size of the Ethernet headers of the current frame in the buffer.
Definition: ethernet.h:442
flow_hash_config_t lb_hash_config
the hash config to use when selecting a bucket.
Definition: load_balance.h:161
u8 src_address[6]
Definition: packet.h:56
void dpo_copy(dpo_id_t *dst, const dpo_id_t *src)
atomic copy a data-plane object.
Definition: dpo.c:262
u32 index_t
A Data-Path Object is an object that represents actions that are applied to packets are they are swit...
Definition: dpo.h:41
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:523
static const char * load_balance_attr_names[]
Definition: load_balance.c:32
Combined counter to hold both packets and byte differences.
Definition: counter_types.h:26
static const char *const load_balance_ip4_nodes[]
The per-protocol VLIB graph nodes that are assigned to a load-balance object.
Definition: load_balance.c:914
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
Definition: vec.h:561
static u8 * format_load_balance_dpo(u8 *s, va_list *args)
Definition: load_balance.c:184
int i
load_balance_flags_t lb_flags
Flags concenring the LB&#39;s creation and modification.
Definition: load_balance.h:133
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
#define FOR_EACH_LOAD_BALANCE_ATTR(_attr)
Definition: load_balance.h:92
#define vec_validate_aligned(V, I, A)
Make sure vector is long enough for given index (no header, specified alignment)
Definition: vec.h:451
static u8 * load_balance_format(index_t lbi, load_balance_format_flags_t flags, u32 indent, u8 *s)
Definition: load_balance.c:115
static load_balance_t * load_balance_alloc_i(void)
Definition: load_balance.c:93
index_t load_balance_get_urpf(index_t lbi)
Definition: load_balance.c:329
unsigned char u8
Definition: types.h:56
static const char *const load_balance_l2_nodes[]
Definition: load_balance.c:929
#define pool_len(p)
Number of elements in pool vector.
Definition: pool.h:140
double f64
Definition: types.h:142
index_t load_balance_create(u32 n_buckets, dpo_proto_t lb_proto, flow_hash_config_t fhc)
Definition: load_balance.c:239
const dpo_id_t * drop_dpo_get(dpo_proto_t proto)
Definition: drop_dpo.c:25
u32 vlib_log_class_t
Definition: vlib.h:51
void dpo_register(dpo_type_t type, const dpo_vft_t *vft, const char *const *const *nodes)
For a given DPO type Register:
Definition: dpo.c:322
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:498
i64 word
Definition: types.h:111
load_balance_t * load_balance_pool
Pool of all DPOs.
Definition: load_balance.c:51
void load_balance_map_module_init(void)
Make/add a new or lock an existing Load-balance map.
static dpo_id_t * load_balance_get_buckets(load_balance_t *lb)
Definition: load_balance.c:80
void load_balance_module_init(void)
Definition: load_balance.c:955
u16 lb_n_buckets_minus_1
number of buckets in the load-balance - 1.
Definition: load_balance.h:121
u8 dst_address[6]
Definition: packet.h:55
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:129
static int next_hop_sort_by_weight(const load_balance_path_t *n1, const load_balance_path_t *n2)
Definition: load_balance.c:350
static void load_balance_mem_show(void)
Definition: load_balance.c:887
void fib_urpf_list_lock(index_t ui)
Definition: fib_urpf_list.c:87
static load_balance_t * load_balance_create_i(u32 num_buckets, dpo_proto_t lb_proto, flow_hash_config_t fhc)
Definition: load_balance.c:214
void fib_show_memory_usage(const char *name, u32 in_use_elts, u32 allocd_elts, size_t size_elt)
Show the memory usage for a type.
Definition: fib_node.c:220
void load_balance_multipath_update(const dpo_id_t *dpo, const load_balance_path_t *raw_nhs, load_balance_flags_t flags)
Definition: load_balance.c:602
unsigned int u32
Definition: types.h:88
f64 load_balance_get_multipath_tolerance(void)
Definition: load_balance.c:68
enum dpo_proto_t_ dpo_proto_t
Data path protocol.
static void load_balance_lock(dpo_id_t *dpo)
Definition: load_balance.c:837
static void load_balance_fill_buckets(load_balance_t *lb, load_balance_path_t *nhs, dpo_id_t *buckets, u32 n_buckets, load_balance_flags_t flags)
Definition: load_balance.c:577
int load_balance_is_drop(const dpo_id_t *dpo)
Definition: load_balance.c:272
static void load_balance_unlock(dpo_id_t *dpo)
Definition: load_balance.c:872
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:170
static load_balance_path_t * load_balance_multipath_next_hop_fixup(const load_balance_path_t *nhs, dpo_proto_t drop_proto)
Definition: load_balance.c:480
static void vlib_zero_combined_counter(vlib_combined_counter_main_t *cm, u32 index)
Clear a combined counter Clears the set of per-thread counters.
Definition: counter.h:285
static uword bier_load_balance(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
counter_t packets
packet counter
Definition: counter_types.h:28
u8 * format_load_balance(u8 *s, va_list *args)
Definition: load_balance.c:175
dpo_type_t dpoi_type
the type
Definition: dpo.h:174
static const dpo_id_t * load_balance_get_bucket_i(const load_balance_t *lb, u32 bucket)
Definition: load_balance.h:229
dpo_proto_t lb_proto
The protocol of packets that traverse this LB.
Definition: load_balance.h:128
static_always_inline u32 bier_compute_flow_hash(const bier_hdr_t *hdr)
Definition: bier_fwd.h:23
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
flow_hash_config_t load_balance_get_default_flow_hash(dpo_proto_t lb_proto)
Definition: load_balance.c:193
void load_balance_set_fib_entry_flags(index_t lbi, fib_entry_flag_t flags)
Definition: load_balance.c:299
load-balancing over a choice of [un]equal cost paths
Definition: dpo.h:102
static u8 * format_bier_load_balance_trace(u8 *s, va_list *args)
#define MPLS_FLOW_HASH_DEFAULT
There are no options for controlling the MPLS flow hash.
Definition: mpls_fib.h:39
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
static u32 ip6_compute_flow_hash(const ip6_header_t *ip, flow_hash_config_t flow_hash_config)
Definition: ip6.h:380
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:287
#define vec_dup(V)
Return copy of vector (no header, no alignment)
Definition: vec.h:376
The FIB DPO provieds;.
Definition: load_balance.h:106
u8 n_nhs
Definition: gbp.api:289
#define PREDICT_FALSE(x)
Definition: clib.h:111
#define always_inline
Definition: ipsec.h:28
u8 * format_load_balance_map(u8 *s, va_list *ap)
#define LB_DBG(_lb, _fmt, _args...)
Definition: load_balance.c:39
vl_api_gbp_next_hop_t nhs[8]
Definition: gbp.api:290
static const char *const load_balance_bier_nodes[]
Definition: load_balance.c:939
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:338
const dpo_id_t * load_balance_get_bucket(index_t lbi, u32 bucket)
Definition: load_balance.c:339
vlib_main_t * vm
Definition: in2out_ed.c:1810
The load-balance object represents an ECMP choice.
Definition: load_balance.h:44
vlib_node_registration_t l2_load_balance_node
(constructor) VLIB_REGISTER_NODE (l2_load_balance_node)
dpo_id_t lb_buckets_inline[LB_NUM_INLINE_BUCKETS]
The rest of the cache line is used for buckets.
Definition: load_balance.h:174
#define pool_get_aligned(P, E, A)
Allocate an object E from a pool P with alignment A.
Definition: pool.h:231
static void load_balance_fill_buckets_norm(load_balance_t *lb, load_balance_path_t *nhs, dpo_id_t *buckets, u32 n_buckets)
Definition: load_balance.c:506
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
#define UNFORMAT_END_OF_INPUT
Definition: format.h:145
u32 flags
Definition: vhost_user.h:141
#define hash_mix64(a0, b0, c0)
Definition: hash.h:531
svmdb_client_t * c
u16 n_vectors
Definition: node.h:397
static void vlib_get_combined_counter(const vlib_combined_counter_main_t *cm, u32 index, vlib_counter_t *result)
Get the value of a combined counter, never called in the speed path Scrapes the entire set of per-thr...
Definition: counter.h:259
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:342
static const char *const load_balance_nsh_nodes[]
Definition: load_balance.c:934
void load_balance_map_show_mem(void)
enum load_balance_attr_t_ load_balance_attr_t
Flags controlling load-balance creation and modification.
static f64 fabs(f64 x)
Definition: math.h:50
static uword max_pow2(uword x)
Definition: clib.h:226
static u8 * format_nsh_load_balance_trace(u8 *s, va_list *args)
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:284
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:456
#define LB_NUM_INLINE_BUCKETS
The number of buckets that a load-balance object can have and still fit in one cache-line.
Definition: load_balance.h:56
vlib_combined_counter_main_t lbm_via_counters
Definition: load_balance.h:47
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1810
enum fib_entry_flag_t_ fib_entry_flag_t
static uword nsh_load_balance(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:152
vlib_node_registration_t bier_load_balance_node
(constructor) VLIB_REGISTER_NODE (bier_load_balance_node)
vlib_node_registration_t nsh_load_balance_node
(constructor) VLIB_REGISTER_NODE (nsh_load_balance_node)
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:515
#define ASSERT(truth)
index_t lb_urpf
This is the index of the uRPF list for this LB.
Definition: load_balance.h:156
u8 data[128]
Definition: ipsec_types.api:87
static load_balance_t * load_balance_get(index_t lbi)
Definition: load_balance.h:220
static clib_error_t * load_balance_show(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: load_balance.c:977
u32 lb_locks
The number of locks, which is approximately the number of users, of this load-balance.
Definition: load_balance.h:146
static u64 mac_to_u64(u8 *m)
#define IP_FLOW_HASH_DEFAULT
Default: 5-tuple without the "reverse" bit.
Definition: lookup.h:70
#define LB_HAS_INLINE_BUCKETS(_lb)
Definition: load_balance.h:225
void load_balance_set_bucket(index_t lbi, u32 bucket, const dpo_id_t *next)
Definition: load_balance.c:256
u8 * format_dpo_id(u8 *s, va_list *args)
Format a DPO_id_t oject
Definition: dpo.c:148
u32 flow_hash_config_t
A flow hash configuration is a mask of the flow hash options.
Definition: lookup.h:84
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
enum load_balance_flags_t_ load_balance_flags_t
counter_t bytes
byte counter
Definition: counter_types.h:29
static uword l2_load_balance(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: defs.h:47
#define DPO_PROTO_NUM
Definition: dpo.h:70
A BIER header of variable length The encoding follows: https://tools.ietf.org/html/draft-ietf-bier-mp...
Definition: bier_types.h:321
static word flt_round_nearest(f64 x)
Definition: clib.h:277
void qsort(void *base, uword n, uword size, int(*compar)(const void *, const void *))
Definition: qsort.c:56
vl_api_address_t ip
Definition: l2.api:490
index_t dpoi_index
the index of objects of that type
Definition: dpo.h:186
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
u32 path_weight
weight for the path.
Definition: load_balance.h:76
#define INDEX_INVALID
Invalid index - used when no index is known blazoned capitals INVALID speak volumes where ~0 does not...
Definition: dpo.h:47
static void load_balance_destroy(load_balance_t *lb)
Definition: load_balance.c:847
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
static uword load_balance_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int is_l2)
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
char * name
The counter collection&#39;s name.
Definition: counter.h:193
void fib_urpf_list_unlock(index_t ui)
Definition: fib_urpf_list.c:68
One path from an [EU]CMP set that the client wants to add to a load-balance object.
Definition: load_balance.h:62
u8 * format_dpo_proto(u8 *s, va_list *args)
format a DPO protocol
Definition: dpo.c:178
static void load_balance_fill_buckets_sticky(load_balance_t *lb, load_balance_path_t *nhs, dpo_id_t *buckets, u32 n_buckets)
Definition: load_balance.c:530
static u32 l2_flow_hash(vlib_buffer_t *b0)
#define vnet_buffer(b)
Definition: buffer.h:408
index_t lb_map
index of the load-balance map, INVALID if this LB does not use one
Definition: load_balance.h:151
const f64 multipath_next_hop_error_tolerance
Definition: load_balance.c:30
int dpo_is_drop(const dpo_id_t *dpo)
The Drop DPO will drop all packets, no questions asked.
Definition: drop_dpo.c:33
u32 ip_multipath_normalize_next_hops(const load_balance_path_t *raw_next_hops, load_balance_path_t **normalized_next_hops, u32 *sum_weight_in, f64 multipath_next_hop_error_tolerance)
Definition: load_balance.c:360
void dpo_reset(dpo_id_t *dpo)
reset a DPO ID The DPO will be unlocked.
Definition: dpo.c:232
#define vec_foreach(var, vec)
Vector iterator.
vlib_main_t vlib_node_runtime_t vlib_frame_t * frame
Definition: in2out_ed.c:1811
#define CLIB_MEMORY_BARRIER()
Definition: clib.h:115
u16 dpoi_next_node
The next VLIB node to follow.
Definition: dpo.h:182
u8 ip_version_and_header_length
Definition: ip4_packet.h:138
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:689
struct load_balance_trace_t_ load_balance_trace_t
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:85
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:978
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:171
void dpo_stack(dpo_type_t child_type, dpo_proto_t child_proto, dpo_id_t *dpo, const dpo_id_t *parent)
Stack one DPO object on another, and thus establish a child-parent relationship.
Definition: dpo.c:516
static void load_balance_set_bucket_i(load_balance_t *lb, u32 bucket, dpo_id_t *buckets, const dpo_id_t *next)
Definition: load_balance.c:247
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:128