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Vector Packet Processing
l2_learn.c
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1 /*
2  * l2_learn.c : layer 2 learning using l2fib
3  *
4  * Copyright (c) 2013 Cisco and/or its affiliates.
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #include <vlib/vlib.h>
19 #include <vnet/vnet.h>
20 #include <vnet/pg/pg.h>
21 #include <vnet/ethernet/ethernet.h>
22 #include <vlib/cli.h>
23 
24 #include <vnet/l2/l2_input.h>
25 #include <vnet/l2/feat_bitmap.h>
26 #include <vnet/l2/l2_fib.h>
27 #include <vnet/l2/l2_learn.h>
28 
29 #include <vppinfra/error.h>
30 #include <vppinfra/hash.h>
31 
33 
34 /**
35  * @file
36  * @brief Ethernet Bridge Learning.
37  *
38  * Populate the mac table with entries mapping the packet's source mac + bridge
39  * domain ID to the input sw_if_index.
40  *
41  * Note that learning and forwarding are separate graph nodes. This means that
42  * for a set of packets, all learning is performed first, then all nodes are
43  * forwarded. The forwarding is done based on the end-state of the mac table,
44  * instead of the state after each packet. Thus the forwarding results could
45  * differ in certain cases (mac move tests), but this not expected to cause
46  * problems in real-world networks. It is much simpler to separate learning
47  * and forwarding into separate nodes.
48  */
49 
50 
51 typedef struct
52 {
53  u8 src[6];
54  u8 dst[6];
58 
59 
60 /* packet trace format function */
61 static u8 *
62 format_l2learn_trace (u8 * s, va_list * args)
63 {
64  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
65  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
66  l2learn_trace_t *t = va_arg (*args, l2learn_trace_t *);
67 
68  s = format (s, "l2-learn: sw_if_index %d dst %U src %U bd_index %d",
69  t->sw_if_index,
72  return s;
73 }
74 
76 
77 #define foreach_l2learn_error \
78 _(L2LEARN, "L2 learn packets") \
79 _(MISS, "L2 learn misses") \
80 _(MAC_MOVE, "L2 mac moves") \
81 _(MAC_MOVE_VIOLATE, "L2 mac move violations") \
82 _(LIMIT, "L2 not learned due to limit") \
83 _(HIT_UPDATE, "L2 learn hit updates") \
84 _(FILTER_DROP, "L2 filter mac drops")
85 
86 typedef enum
87 {
88 #define _(sym,str) L2LEARN_ERROR_##sym,
90 #undef _
93 
94 static char *l2learn_error_strings[] = {
95 #define _(sym,string) string,
97 #undef _
98 };
99 
100 typedef enum
101 {
106 
107 
108 /** Perform learning on one packet based on the mac table lookup result. */
109 
112  l2learn_main_t * msm,
113  u64 * counter_base,
114  vlib_buffer_t * b0,
115  u32 sw_if_index0,
116  l2fib_entry_key_t * key0,
117  l2fib_entry_key_t * cached_key,
118  u32 * count,
119  l2fib_entry_result_t * result0, u32 * next0, u8 timestamp)
120 {
121  /* Set up the default next node (typically L2FWD) */
122  *next0 = vnet_l2_feature_next (b0, msm->feat_next_node_index,
123  L2INPUT_FEAT_LEARN);
124 
125  /* Check mac table lookup result */
126  if (PREDICT_TRUE (result0->fields.sw_if_index == sw_if_index0))
127  {
128  /* Entry in L2FIB with matching sw_if_index matched - normal fast path */
129  u32 dtime = timestamp - result0->fields.timestamp;
130  u32 dsn = result0->fields.sn.as_u16 - vnet_buffer (b0)->l2.l2fib_sn;
131  u32 check = (dtime && vnet_buffer (b0)->l2.bd_age) || dsn;
132 
133  if (PREDICT_TRUE (check == 0))
134  return; /* MAC entry up to date */
135  if (result0->fields.age_not)
136  return; /* Static MAC always age_not */
137  if (msm->global_learn_count > msm->global_learn_limit)
138  return; /* Above learn limit - do not update */
139 
140  /* Limit updates per l2-learn node call to avoid prolonged update burst
141  * as dtime advance over 1 minute mark, unless more than 1 min behind
142  * or SN obsolete */
143  if ((*count > 2) && (dtime == 1) && (dsn == 0))
144  return;
145 
146  counter_base[L2LEARN_ERROR_HIT_UPDATE] += 1;
147  *count += 1;
148  }
149  else if (result0->raw == ~0)
150  {
151  /* Entry not in L2FIB - add it */
152  counter_base[L2LEARN_ERROR_MISS] += 1;
153 
154  if (msm->global_learn_count >= msm->global_learn_limit)
155  {
156  /*
157  * Global limit reached. Do not learn the mac but forward the packet.
158  * In the future, limits could also be per-interface or bridge-domain.
159  */
160  counter_base[L2LEARN_ERROR_LIMIT] += 1;
161  return;
162  }
163 
164  /* Do not learn if mac is 0 */
165  l2fib_entry_key_t key = *key0;
166  key.fields.bd_index = 0;
167  if (key.raw == 0)
168  return;
169 
170  /* It is ok to learn */
171  msm->global_learn_count++;
172  result0->raw = 0; /* clear all fields */
173  result0->fields.sw_if_index = sw_if_index0;
174  result0->fields.lrn_evt = (msm->client_pid != 0);
175  }
176  else
177  {
178  /* Entry in L2FIB with different sw_if_index - mac move or filter */
179  if (result0->fields.filter)
180  {
181  ASSERT (result0->fields.sw_if_index == ~0);
182  /* drop packet because lookup matched a filter mac entry */
183  b0->error = node->errors[L2LEARN_ERROR_FILTER_DROP];
184  *next0 = L2LEARN_NEXT_DROP;
185  return;
186  }
187 
188  if (result0->fields.static_mac)
189  {
190  /*
191  * Don't overwrite a static mac
192  * TODO: Check violation policy. For now drop the packet
193  */
194  b0->error = node->errors[L2LEARN_ERROR_MAC_MOVE_VIOLATE];
195  *next0 = L2LEARN_NEXT_DROP;
196  return;
197  }
198 
199  /*
200  * TODO: may want to rate limit mac moves
201  * TODO: check global/bridge domain/interface learn limits
202  */
203  result0->fields.sw_if_index = sw_if_index0;
204  if (result0->fields.age_not) /* The mac was provisioned */
205  {
206  msm->global_learn_count++;
207  result0->fields.age_not = 0;
208  }
209  result0->fields.lrn_evt = (msm->client_pid != 0);
210  counter_base[L2LEARN_ERROR_MAC_MOVE] += 1;
211  }
212 
213  /* Update the entry */
214  result0->fields.timestamp = timestamp;
215  result0->fields.sn.as_u16 = vnet_buffer (b0)->l2.l2fib_sn;
216 
217  BVT (clib_bihash_kv) kv;
218  kv.key = key0->raw;
219  kv.value = result0->raw;
220  BV (clib_bihash_add_del) (msm->mac_table, &kv, 1 /* is_add */ );
221 
222  /* Invalidate the cache */
223  cached_key->raw = ~0;
224 }
225 
226 
229  vlib_frame_t * frame, int do_trace)
230 {
231  u32 n_left_from, *from, *to_next;
232  l2learn_next_t next_index;
234  vlib_node_t *n = vlib_get_node (vm, l2learn_node.index);
235  u32 node_counter_base_index = n->error_heap_index;
236  vlib_error_main_t *em = &vm->error_main;
237  l2fib_entry_key_t cached_key;
238  l2fib_entry_result_t cached_result;
239  u8 timestamp = (u8) (vlib_time_now (vm) / 60);
240  u32 count = 0;
241 
242  from = vlib_frame_vector_args (frame);
243  n_left_from = frame->n_vectors; /* number of packets to process */
244  next_index = node->cached_next_index;
245 
246  /* Clear the one-entry cache in case mac table was updated */
247  cached_key.raw = ~0;
248  cached_result.raw = ~0; /* warning be gone */
249 
250  while (n_left_from > 0)
251  {
252  u32 n_left_to_next;
253 
254  /* get space to enqueue frame to graph node "next_index" */
255  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
256 
257  while (n_left_from >= 8 && n_left_to_next >= 4)
258  {
259  u32 bi0, bi1, bi2, bi3;
260  vlib_buffer_t *b0, *b1, *b2, *b3;
261  u32 next0, next1, next2, next3;
262  u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
263  ethernet_header_t *h0, *h1, *h2, *h3;
264  l2fib_entry_key_t key0, key1, key2, key3;
265  l2fib_entry_result_t result0, result1, result2, result3;
266  u32 bucket0, bucket1, bucket2, bucket3;
267 
268  /* Prefetch next iteration. */
269  {
270  vlib_buffer_t *p4, *p5, *p6, *p7;;
271 
272  p4 = vlib_get_buffer (vm, from[4]);
273  p5 = vlib_get_buffer (vm, from[5]);
274  p6 = vlib_get_buffer (vm, from[6]);
275  p7 = vlib_get_buffer (vm, from[7]);
276 
277  vlib_prefetch_buffer_header (p4, LOAD);
278  vlib_prefetch_buffer_header (p5, LOAD);
279  vlib_prefetch_buffer_header (p6, LOAD);
280  vlib_prefetch_buffer_header (p7, LOAD);
281 
286  }
287 
288  /* speculatively enqueue b0 and b1 to the current next frame */
289  /* bi is "buffer index", b is pointer to the buffer */
290  to_next[0] = bi0 = from[0];
291  to_next[1] = bi1 = from[1];
292  to_next[2] = bi2 = from[2];
293  to_next[3] = bi3 = from[3];
294  from += 4;
295  to_next += 4;
296  n_left_from -= 4;
297  n_left_to_next -= 4;
298 
299  b0 = vlib_get_buffer (vm, bi0);
300  b1 = vlib_get_buffer (vm, bi1);
301  b2 = vlib_get_buffer (vm, bi2);
302  b3 = vlib_get_buffer (vm, bi3);
303 
304  /* RX interface handles */
305  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
306  sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
307  sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX];
308  sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX];
309 
310  /* Process 4 x pkts */
311 
312  h0 = vlib_buffer_get_current (b0);
313  h1 = vlib_buffer_get_current (b1);
314  h2 = vlib_buffer_get_current (b2);
315  h3 = vlib_buffer_get_current (b3);
316 
317  if (do_trace)
318  {
319  if (b0->flags & VLIB_BUFFER_IS_TRACED)
320  {
321  l2learn_trace_t *t =
322  vlib_add_trace (vm, node, b0, sizeof (*t));
323  t->sw_if_index = sw_if_index0;
324  t->bd_index = vnet_buffer (b0)->l2.bd_index;
325  clib_memcpy (t->src, h0->src_address, 6);
326  clib_memcpy (t->dst, h0->dst_address, 6);
327  }
328  if (b1->flags & VLIB_BUFFER_IS_TRACED)
329  {
330  l2learn_trace_t *t =
331  vlib_add_trace (vm, node, b1, sizeof (*t));
332  t->sw_if_index = sw_if_index1;
333  t->bd_index = vnet_buffer (b1)->l2.bd_index;
334  clib_memcpy (t->src, h1->src_address, 6);
335  clib_memcpy (t->dst, h1->dst_address, 6);
336  }
337  if (b2->flags & VLIB_BUFFER_IS_TRACED)
338  {
339  l2learn_trace_t *t =
340  vlib_add_trace (vm, node, b2, sizeof (*t));
341  t->sw_if_index = sw_if_index2;
342  t->bd_index = vnet_buffer (b2)->l2.bd_index;
343  clib_memcpy (t->src, h2->src_address, 6);
344  clib_memcpy (t->dst, h2->dst_address, 6);
345  }
346  if (b3->flags & VLIB_BUFFER_IS_TRACED)
347  {
348  l2learn_trace_t *t =
349  vlib_add_trace (vm, node, b3, sizeof (*t));
350  t->sw_if_index = sw_if_index3;
351  t->bd_index = vnet_buffer (b3)->l2.bd_index;
352  clib_memcpy (t->src, h3->src_address, 6);
353  clib_memcpy (t->dst, h3->dst_address, 6);
354  }
355  }
356 
357  /* process 4 pkts */
359  L2LEARN_ERROR_L2LEARN, 4);
360 
361  l2fib_lookup_4 (msm->mac_table, &cached_key, &cached_result,
362  h0->src_address,
363  h1->src_address,
364  h2->src_address,
365  h3->src_address,
366  vnet_buffer (b0)->l2.bd_index,
367  vnet_buffer (b1)->l2.bd_index,
368  vnet_buffer (b2)->l2.bd_index,
369  vnet_buffer (b3)->l2.bd_index,
370  &key0, &key1, &key2, &key3,
371  &bucket0, &bucket1, &bucket2, &bucket3,
372  &result0, &result1, &result2, &result3);
373 
374  l2learn_process (node, msm, &em->counters[node_counter_base_index],
375  b0, sw_if_index0, &key0, &cached_key,
376  &count, &result0, &next0, timestamp);
377 
378  l2learn_process (node, msm, &em->counters[node_counter_base_index],
379  b1, sw_if_index1, &key1, &cached_key,
380  &count, &result1, &next1, timestamp);
381 
382  l2learn_process (node, msm, &em->counters[node_counter_base_index],
383  b2, sw_if_index2, &key2, &cached_key,
384  &count, &result2, &next2, timestamp);
385 
386  l2learn_process (node, msm, &em->counters[node_counter_base_index],
387  b3, sw_if_index3, &key3, &cached_key,
388  &count, &result3, &next3, timestamp);
389 
390  /* verify speculative enqueues, maybe switch current next frame */
391  /* if next0==next1==next_index then nothing special needs to be done */
392  vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
393  to_next, n_left_to_next,
394  bi0, bi1, bi2, bi3,
395  next0, next1, next2, next3);
396  }
397 
398  while (n_left_from > 0 && n_left_to_next > 0)
399  {
400  u32 bi0;
401  vlib_buffer_t *b0;
402  u32 next0;
403  u32 sw_if_index0;
404  ethernet_header_t *h0;
405  l2fib_entry_key_t key0;
406  l2fib_entry_result_t result0;
407  u32 bucket0;
408 
409  /* speculatively enqueue b0 to the current next frame */
410  bi0 = from[0];
411  to_next[0] = bi0;
412  from += 1;
413  to_next += 1;
414  n_left_from -= 1;
415  n_left_to_next -= 1;
416 
417  b0 = vlib_get_buffer (vm, bi0);
418 
419  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
420 
421  h0 = vlib_buffer_get_current (b0);
422 
423  if (do_trace && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
424  {
425  l2learn_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
426  t->sw_if_index = sw_if_index0;
427  t->bd_index = vnet_buffer (b0)->l2.bd_index;
428  clib_memcpy (t->src, h0->src_address, 6);
429  clib_memcpy (t->dst, h0->dst_address, 6);
430  }
431 
432  /* process 1 pkt */
434  L2LEARN_ERROR_L2LEARN, 1);
435 
436 
437  l2fib_lookup_1 (msm->mac_table, &cached_key, &cached_result,
438  h0->src_address, vnet_buffer (b0)->l2.bd_index,
439  &key0, &bucket0, &result0);
440 
441  l2learn_process (node, msm, &em->counters[node_counter_base_index],
442  b0, sw_if_index0, &key0, &cached_key,
443  &count, &result0, &next0, timestamp);
444 
445  /* verify speculative enqueue, maybe switch current next frame */
446  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
447  to_next, n_left_to_next,
448  bi0, next0);
449  }
450 
451  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
452  }
453 
454  return frame->n_vectors;
455 }
456 
457 static uword
459  vlib_node_runtime_t * node, vlib_frame_t * frame)
460 {
461  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
462  return l2learn_node_inline (vm, node, frame, 1 /* do_trace */ );
463  return l2learn_node_inline (vm, node, frame, 0 /* do_trace */ );
464 }
465 
466 /* *INDENT-OFF* */
467 VLIB_REGISTER_NODE (l2learn_node,static) = {
468  .function = l2learn_node_fn,
469  .name = "l2-learn",
470  .vector_size = sizeof (u32),
471  .format_trace = format_l2learn_trace,
472  .type = VLIB_NODE_TYPE_INTERNAL,
473 
474  .n_errors = ARRAY_LEN(l2learn_error_strings),
475  .error_strings = l2learn_error_strings,
476 
477  .n_next_nodes = L2LEARN_N_NEXT,
478 
479  /* edit / add dispositions here */
480  .next_nodes = {
481  [L2LEARN_NEXT_DROP] = "error-drop",
482  [L2LEARN_NEXT_L2FWD] = "l2-fwd",
483  },
484 };
485 /* *INDENT-ON* */
486 
489 {
491 
492  mp->vlib_main = vm;
493  mp->vnet_main = vnet_get_main ();
494 
495  /* Initialize the feature next-node indexes */
497  l2learn_node.index,
501 
502  /* init the hash table ptr */
503  mp->mac_table = get_mac_table ();
504 
505  /*
506  * Set the default number of dynamically learned macs to the number
507  * of buckets.
508  */
510 
511  return 0;
512 }
513 
515 
516 
517 /**
518  * Set subinterface learn enable/disable.
519  * The CLI format is:
520  * set interface l2 learn <interface> [disable]
521  */
522 static clib_error_t *
524  unformat_input_t * input, vlib_cli_command_t * cmd)
525 {
526  vnet_main_t *vnm = vnet_get_main ();
527  clib_error_t *error = 0;
528  u32 sw_if_index;
529  u32 enable;
530 
531  if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
532  {
533  error = clib_error_return (0, "unknown interface `%U'",
534  format_unformat_error, input);
535  goto done;
536  }
537 
538  enable = 1;
539  if (unformat (input, "disable"))
540  {
541  enable = 0;
542  }
543 
544  /* set the interface flag */
545  l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_LEARN, enable);
546 
547 done:
548  return error;
549 }
550 
551 /*?
552  * Layer 2 learning can be enabled and disabled on each
553  * interface and on each bridge-domain. Use this command to
554  * manage interfaces. It is enabled by default.
555  *
556  * @cliexpar
557  * Example of how to enable learning:
558  * @cliexcmd{set interface l2 learn GigabitEthernet0/8/0}
559  * Example of how to disable learning:
560  * @cliexcmd{set interface l2 learn GigabitEthernet0/8/0 disable}
561 ?*/
562 /* *INDENT-OFF* */
563 VLIB_CLI_COMMAND (int_learn_cli, static) = {
564  .path = "set interface l2 learn",
565  .short_help = "set interface l2 learn <interface> [disable]",
566  .function = int_learn,
567 };
568 /* *INDENT-ON* */
569 
570 
571 static clib_error_t *
573 {
575 
577  {
578  if (unformat (input, "limit %d", &mp->global_learn_limit))
579  ;
580 
581  else
582  return clib_error_return (0, "unknown input `%U'",
583  format_unformat_error, input);
584  }
585 
586  return 0;
587 }
588 
590 
591 
592 /*
593  * fd.io coding-style-patch-verification: ON
594  *
595  * Local Variables:
596  * eval: (c-set-style "gnu")
597  * End:
598  */
u32 error_heap_index
Definition: node.h:278
u32 global_learn_count
Definition: l2_learn.h:32
#define CLIB_UNUSED(x)
Definition: clib.h:79
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
#define PREDICT_TRUE(x)
Definition: clib.h:106
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:224
u8 src_address[6]
Definition: packet.h:54
#define vlib_validate_buffer_enqueue_x4(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3)
Finish enqueueing four buffers forward in the graph.
Definition: buffer_node.h:138
struct _vlib_node_registration vlib_node_registration_t
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:983
clib_error_t * l2learn_init(vlib_main_t *vm)
Definition: l2_learn.c:488
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
unformat_function_t unformat_vnet_sw_interface
Definition: l2_fib.h:108
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:415
static u32 vnet_l2_feature_next(vlib_buffer_t *b, u32 *next_nodes, u32 feat_bit)
Return the graph node index for the feature corresponding to the next set bit after clearing the curr...
Definition: feat_bitmap.h:94
static_always_inline void l2learn_process(vlib_node_runtime_t *node, l2learn_main_t *msm, u64 *counter_base, vlib_buffer_t *b0, u32 sw_if_index0, l2fib_entry_key_t *key0, l2fib_entry_key_t *cached_key, u32 *count, l2fib_entry_result_t *result0, u32 *next0, u8 timestamp)
Perform learning on one packet based on the mac table lookup result.
Definition: l2_learn.c:111
l2learn_main_t l2learn_main
Definition: l2_learn.c:32
#define static_always_inline
Definition: clib.h:93
u8 * format_ethernet_address(u8 *s, va_list *args)
Definition: format.c:44
int clib_bihash_add_del(clib_bihash *h, clib_bihash_kv *add_v, int is_add)
Add or delete a (key,value) pair from a bi-hash table.
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
u8 dst_address[6]
Definition: packet.h:53
static BVT(clib_bihash)
Definition: adj_nbr.c:26
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:171
#define clib_error_return(e, args...)
Definition: error.h:99
unsigned long u64
Definition: types.h:89
static char * l2learn_error_strings[]
Definition: l2_learn.c:94
vlib_error_main_t error_main
Definition: main.h:138
vnet_main_t * vnet_main
Definition: l2_learn.h:46
struct _unformat_input_t unformat_input_t
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:195
#define PREDICT_FALSE(x)
Definition: clib.h:105
#define VLIB_CONFIG_FUNCTION(x, n,...)
Definition: init.h:119
static_always_inline uword l2learn_node_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int do_trace)
Definition: l2_learn.c:228
static u8 * format_l2learn_trace(u8 *s, va_list *args)
Definition: l2_learn.c:62
#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:364
u64 raw
Definition: l2_fib.h:126
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:113
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1158
struct l2fib_entry_key_t::@206::@208 fields
u64 * counters
Definition: error.h:78
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
u16 n_vectors
Definition: node.h:344
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:82
vlib_main_t * vm
Definition: buffer.c:283
static void feat_bitmap_init_next_nodes(vlib_main_t *vm, u32 node_index, u32 num_features, char **feat_names, u32 *next_nodes)
Initialize the feature next-node indexes of a graph node.
Definition: feat_bitmap.h:43
#define foreach_l2learn_error
Definition: l2_learn.c:77
static clib_error_t * l2learn_config(vlib_main_t *vm, unformat_input_t *input)
Definition: l2_learn.c:572
#define VLIB_BUFFER_IS_TRACED
Definition: buffer.h:93
#define clib_memcpy(a, b, c)
Definition: string.h:75
l2learn_next_t
Definition: l2_learn.c:100
static clib_error_t * int_learn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Set subinterface learn enable/disable.
Definition: l2_learn.c:523
#define ARRAY_LEN(x)
Definition: clib.h:59
u32 feat_next_node_index[32]
Definition: l2_learn.h:42
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:454
char ** l2input_get_feat_names(void)
Return an array of strings containing graph node names of each feature.
Definition: l2_input.c:60
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
l2learn_error_t
Definition: l2_learn.c:86
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:456
struct l2fib_entry_result_t::@214::@216 fields
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
Definition: l2_fib.h:71
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:259
size_t count
Definition: vapi.c:42
u32 global_learn_limit
Definition: l2_learn.h:35
static uword l2learn_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: l2_learn.c:458
u64 uword
Definition: types.h:112
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
u32 l2input_intf_bitmap_enable(u32 sw_if_index, u32 feature_bitmap, u32 enable)
Enable (or disable) the feature in the bitmap for the given interface.
Definition: l2_input.c:534
unsigned short u16
Definition: types.h:57
unsigned char u8
Definition: types.h:56
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:267
vlib_main_t * vlib_main
Definition: l2_learn.h:45
#define vnet_buffer(b)
Definition: buffer.h:326
#define VLIB_NODE_FUNCTION_MULTIARCH(node, fn)
Definition: node.h:158
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:143
u8 data[0]
Packet data.
Definition: buffer.h:159
static vlib_node_t * vlib_get_node(vlib_main_t *vm, u32 i)
Get vlib node by index.
Definition: node_funcs.h:59
static_always_inline void l2fib_lookup_4(BVT(clib_bihash)*mac_table, l2fib_entry_key_t *cached_key, l2fib_entry_result_t *cached_result, u8 *mac0, u8 *mac1, u8 *mac2, u8 *mac3, u16 bd_index0, u16 bd_index1, u16 bd_index2, u16 bd_index3, l2fib_entry_key_t *key0, l2fib_entry_key_t *key1, l2fib_entry_key_t *key2, l2fib_entry_key_t *key3, u32 *bucket0, u32 *bucket1, u32 *bucket2, u32 *bucket3, l2fib_entry_result_t *result0, l2fib_entry_result_t *result1, l2fib_entry_result_t *result2, l2fib_entry_result_t *result3)
Definition: l2_fib.h:299
u16 flags
Copy of main node flags.
Definition: node.h:450
static_always_inline void l2fib_lookup_1(BVT(clib_bihash)*mac_table, l2fib_entry_key_t *cached_key, l2fib_entry_result_t *cached_result, u8 *mac0, u16 bd_index0, l2fib_entry_key_t *key0, u32 *bucket0, l2fib_entry_result_t *result0)
Lookup the entry for mac and bd_index in the mac table for 1 packet.
Definition: l2_fib.h:200
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:67
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:75
u32 client_pid
Definition: l2_learn.h:38
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57
static vlib_node_registration_t l2learn_node
(constructor) VLIB_REGISTER_NODE (l2learn_node)
Definition: l2_learn.c:75
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
Definition: defs.h:46
u64 raw
Definition: l2_fib.h:85
#define L2LEARN_DEFAULT_LIMIT
Definition: l2_learn.h:49
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169