FD.io VPP  v19.01.3-6-g70449b9b9
Vector Packet Processing
l2_learn.c
Go to the documentation of this file.
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 
32 #ifndef CLIB_MARCH_VARIANT
34 #endif
35 
36 /**
37  * @file
38  * @brief Ethernet Bridge Learning.
39  *
40  * Populate the mac table with entries mapping the packet's source mac + bridge
41  * domain ID to the input sw_if_index.
42  *
43  * Note that learning and forwarding are separate graph nodes. This means that
44  * for a set of packets, all learning is performed first, then all nodes are
45  * forwarded. The forwarding is done based on the end-state of the mac table,
46  * instead of the state after each packet. Thus the forwarding results could
47  * differ in certain cases (mac move tests), but this not expected to cause
48  * problems in real-world networks. It is much simpler to separate learning
49  * and forwarding into separate nodes.
50  */
51 
52 
53 typedef struct
54 {
55  u8 src[6];
56  u8 dst[6];
60 
61 
62 /* packet trace format function */
63 static u8 *
64 format_l2learn_trace (u8 * s, va_list * args)
65 {
66  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
67  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
68  l2learn_trace_t *t = va_arg (*args, l2learn_trace_t *);
69 
70  s = format (s, "l2-learn: sw_if_index %d dst %U src %U bd_index %d",
71  t->sw_if_index,
74  return s;
75 }
76 
78 
79 #define foreach_l2learn_error \
80 _(L2LEARN, "L2 learn packets") \
81 _(MISS, "L2 learn misses") \
82 _(MAC_MOVE, "L2 mac moves") \
83 _(MAC_MOVE_VIOLATE, "L2 mac move violations") \
84 _(LIMIT, "L2 not learned due to limit") \
85 _(HIT_UPDATE, "L2 learn hit updates") \
86 _(FILTER_DROP, "L2 filter mac drops")
87 
88 typedef enum
89 {
90 #define _(sym,str) L2LEARN_ERROR_##sym,
92 #undef _
95 
96 static char *l2learn_error_strings[] = {
97 #define _(sym,string) string,
99 #undef _
100 };
101 
102 typedef enum
103 {
108 
109 
110 /** Perform learning on one packet based on the mac table lookup result. */
111 
114  l2learn_main_t * msm,
115  u64 * counter_base,
116  vlib_buffer_t * b0,
117  u32 sw_if_index0,
118  l2fib_entry_key_t * key0,
119  l2fib_entry_key_t * cached_key,
120  u32 * count,
121  l2fib_entry_result_t * result0, u16 * next0, u8 timestamp)
122 {
123  /* Set up the default next node (typically L2FWD) */
124  *next0 = vnet_l2_feature_next (b0, msm->feat_next_node_index,
125  L2INPUT_FEAT_LEARN);
126 
127  /* Check mac table lookup result */
128  if (PREDICT_TRUE (result0->fields.sw_if_index == sw_if_index0))
129  {
130  /* Entry in L2FIB with matching sw_if_index matched - normal fast path */
131  u32 dtime = timestamp - result0->fields.timestamp;
132  u32 dsn = result0->fields.sn.as_u16 - vnet_buffer (b0)->l2.l2fib_sn;
133  u32 check = (dtime && vnet_buffer (b0)->l2.bd_age) || dsn;
134 
135  if (PREDICT_TRUE (check == 0))
136  return; /* MAC entry up to date */
137  if (l2fib_entry_result_is_set_AGE_NOT (result0))
138  return; /* Static MAC always age_not */
139  if (msm->global_learn_count > msm->global_learn_limit)
140  return; /* Above learn limit - do not update */
141 
142  /* Limit updates per l2-learn node call to avoid prolonged update burst
143  * as dtime advance over 1 minute mark, unless more than 1 min behind
144  * or SN obsolete */
145  if ((*count > 2) && (dtime == 1) && (dsn == 0))
146  return;
147 
148  counter_base[L2LEARN_ERROR_HIT_UPDATE] += 1;
149  *count += 1;
150  }
151  else if (result0->raw == ~0)
152  {
153  /* Entry not in L2FIB - add it */
154  counter_base[L2LEARN_ERROR_MISS] += 1;
155 
156  if (msm->global_learn_count >= msm->global_learn_limit)
157  {
158  /*
159  * Global limit reached. Do not learn the mac but forward the packet.
160  * In the future, limits could also be per-interface or bridge-domain.
161  */
162  counter_base[L2LEARN_ERROR_LIMIT] += 1;
163  return;
164  }
165 
166  /* Do not learn if mac is 0 */
167  l2fib_entry_key_t key = *key0;
168  key.fields.bd_index = 0;
169  if (key.raw == 0)
170  return;
171 
172  /* It is ok to learn */
173  msm->global_learn_count++;
174  result0->raw = 0; /* clear all fields */
175  result0->fields.sw_if_index = sw_if_index0;
176  if (msm->client_pid != 0)
177  l2fib_entry_result_set_LRN_EVT (result0);
178  else
179  l2fib_entry_result_clear_LRN_EVT (result0);
180  }
181  else
182  {
183  /* Entry in L2FIB with different sw_if_index - mac move or filter */
184  if (l2fib_entry_result_is_set_FILTER (result0))
185  {
186  ASSERT (result0->fields.sw_if_index == ~0);
187  /* drop packet because lookup matched a filter mac entry */
188  b0->error = node->errors[L2LEARN_ERROR_FILTER_DROP];
189  *next0 = L2LEARN_NEXT_DROP;
190  return;
191  }
192 
193  if (l2fib_entry_result_is_set_STATIC (result0))
194  {
195  /*
196  * Don't overwrite a static mac
197  * TODO: Check violation policy. For now drop the packet
198  */
199  b0->error = node->errors[L2LEARN_ERROR_MAC_MOVE_VIOLATE];
200  *next0 = L2LEARN_NEXT_DROP;
201  return;
202  }
203 
204  /*
205  * TODO: may want to rate limit mac moves
206  * TODO: check global/bridge domain/interface learn limits
207  */
208  result0->fields.sw_if_index = sw_if_index0;
209  if (l2fib_entry_result_is_set_AGE_NOT (result0))
210  {
211  /* The mac was provisioned */
212  msm->global_learn_count++;
213  l2fib_entry_result_clear_AGE_NOT (result0);
214  }
215  if (msm->client_pid != 0)
217  (L2FIB_ENTRY_RESULT_FLAG_LRN_EVT |
218  L2FIB_ENTRY_RESULT_FLAG_LRN_MOV));
219  else
221  (L2FIB_ENTRY_RESULT_FLAG_LRN_EVT |
222  L2FIB_ENTRY_RESULT_FLAG_LRN_MOV));
223  counter_base[L2LEARN_ERROR_MAC_MOVE] += 1;
224  }
225 
226  /* Update the entry */
227  result0->fields.timestamp = timestamp;
228  result0->fields.sn.as_u16 = vnet_buffer (b0)->l2.l2fib_sn;
229 
230  BVT (clib_bihash_kv) kv;
231  kv.key = key0->raw;
232  kv.value = result0->raw;
233  BV (clib_bihash_add_del) (msm->mac_table, &kv, 1 /* is_add */ );
234 
235  /* Invalidate the cache */
236  cached_key->raw = ~0;
237 }
238 
239 
242  vlib_frame_t * frame, int do_trace)
243 {
244  u32 n_left, *from;
246  vlib_node_t *n = vlib_get_node (vm, l2learn_node.index);
247  u32 node_counter_base_index = n->error_heap_index;
248  vlib_error_main_t *em = &vm->error_main;
249  l2fib_entry_key_t cached_key;
250  l2fib_entry_result_t cached_result;
251  u8 timestamp = (u8) (vlib_time_now (vm) / 60);
252  u32 count = 0;
253  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
254  u16 nexts[VLIB_FRAME_SIZE], *next;
255 
256  from = vlib_frame_vector_args (frame);
257  n_left = frame->n_vectors; /* number of packets to process */
258  vlib_get_buffers (vm, from, bufs, n_left);
259  next = nexts;
260  b = bufs;
261 
262  /* Clear the one-entry cache in case mac table was updated */
263  cached_key.raw = ~0;
264  cached_result.raw = ~0; /* warning be gone */
265 
266  while (n_left > 8)
267  {
268  u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
269  const ethernet_header_t *h0, *h1, *h2, *h3;
270  l2fib_entry_key_t key0, key1, key2, key3;
271  l2fib_entry_result_t result0, result1, result2, result3;
272 
273  /* Prefetch next iteration. */
274  {
275  /* buffer header is read and written, so use LOAD
276  * prefetch */
277  vlib_prefetch_buffer_header (b[4], LOAD);
278  vlib_prefetch_buffer_header (b[5], LOAD);
279  vlib_prefetch_buffer_header (b[6], LOAD);
280  vlib_prefetch_buffer_header (b[7], LOAD);
281 
282  CLIB_PREFETCH (b[4]->data, CLIB_CACHE_LINE_BYTES, LOAD);
283  CLIB_PREFETCH (b[5]->data, CLIB_CACHE_LINE_BYTES, LOAD);
284  CLIB_PREFETCH (b[6]->data, CLIB_CACHE_LINE_BYTES, LOAD);
285  CLIB_PREFETCH (b[7]->data, CLIB_CACHE_LINE_BYTES, LOAD);
286  }
287 
288  /* RX interface handles */
289  sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
290  sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
291  sw_if_index2 = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
292  sw_if_index3 = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
293 
294  /* Process 4 x pkts */
295 
296  h0 = vlib_buffer_get_current (b[0]);
297  h1 = vlib_buffer_get_current (b[1]);
298  h2 = vlib_buffer_get_current (b[2]);
299  h3 = vlib_buffer_get_current (b[3]);
300 
301  if (do_trace)
302  {
303  if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
304  {
305  l2learn_trace_t *t =
306  vlib_add_trace (vm, node, b[0], sizeof (*t));
307  t->sw_if_index = sw_if_index0;
308  t->bd_index = vnet_buffer (b[0])->l2.bd_index;
309  clib_memcpy_fast (t->src, h0->src_address, 6);
310  clib_memcpy_fast (t->dst, h0->dst_address, 6);
311  }
312  if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
313  {
314  l2learn_trace_t *t =
315  vlib_add_trace (vm, node, b[1], sizeof (*t));
316  t->sw_if_index = sw_if_index1;
317  t->bd_index = vnet_buffer (b[1])->l2.bd_index;
318  clib_memcpy_fast (t->src, h1->src_address, 6);
319  clib_memcpy_fast (t->dst, h1->dst_address, 6);
320  }
321  if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
322  {
323  l2learn_trace_t *t =
324  vlib_add_trace (vm, node, b[2], sizeof (*t));
325  t->sw_if_index = sw_if_index2;
326  t->bd_index = vnet_buffer (b[2])->l2.bd_index;
327  clib_memcpy_fast (t->src, h2->src_address, 6);
328  clib_memcpy_fast (t->dst, h2->dst_address, 6);
329  }
330  if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
331  {
332  l2learn_trace_t *t =
333  vlib_add_trace (vm, node, b[3], sizeof (*t));
334  t->sw_if_index = sw_if_index3;
335  t->bd_index = vnet_buffer (b[3])->l2.bd_index;
336  clib_memcpy_fast (t->src, h3->src_address, 6);
337  clib_memcpy_fast (t->dst, h3->dst_address, 6);
338  }
339  }
340 
341  /* process 4 pkts */
343  L2LEARN_ERROR_L2LEARN, 4);
344 
345  l2fib_lookup_4 (msm->mac_table, &cached_key, &cached_result,
346  h0->src_address,
347  h1->src_address,
348  h2->src_address,
349  h3->src_address,
350  vnet_buffer (b[0])->l2.bd_index,
351  vnet_buffer (b[1])->l2.bd_index,
352  vnet_buffer (b[2])->l2.bd_index,
353  vnet_buffer (b[3])->l2.bd_index,
354  &key0, &key1, &key2, &key3,
355  &result0, &result1, &result2, &result3);
356 
357  l2learn_process (node, msm, &em->counters[node_counter_base_index],
358  b[0], sw_if_index0, &key0, &cached_key,
359  &count, &result0, next, timestamp);
360 
361  l2learn_process (node, msm, &em->counters[node_counter_base_index],
362  b[1], sw_if_index1, &key1, &cached_key,
363  &count, &result1, next + 1, timestamp);
364 
365  l2learn_process (node, msm, &em->counters[node_counter_base_index],
366  b[2], sw_if_index2, &key2, &cached_key,
367  &count, &result2, next + 2, timestamp);
368 
369  l2learn_process (node, msm, &em->counters[node_counter_base_index],
370  b[3], sw_if_index3, &key3, &cached_key,
371  &count, &result3, next + 3, timestamp);
372 
373  next += 4;
374  b += 4;
375  n_left -= 4;
376  }
377 
378  while (n_left > 0)
379  {
380  u32 sw_if_index0;
381  ethernet_header_t *h0;
382  l2fib_entry_key_t key0;
383  l2fib_entry_result_t result0;
384 
385  sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
386 
387  h0 = vlib_buffer_get_current (b[0]);
388 
389  if (do_trace && PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
390  {
391  l2learn_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
392  t->sw_if_index = sw_if_index0;
393  t->bd_index = vnet_buffer (b[0])->l2.bd_index;
394  clib_memcpy_fast (t->src, h0->src_address, 6);
395  clib_memcpy_fast (t->dst, h0->dst_address, 6);
396  }
397 
398  /* process 1 pkt */
400  L2LEARN_ERROR_L2LEARN, 1);
401 
402 
403  l2fib_lookup_1 (msm->mac_table, &cached_key, &cached_result,
404  h0->src_address, vnet_buffer (b[0])->l2.bd_index,
405  &key0, &result0);
406 
407  l2learn_process (node, msm, &em->counters[node_counter_base_index],
408  b[0], sw_if_index0, &key0, &cached_key,
409  &count, &result0, next, timestamp);
410 
411  next += 1;
412  b += 1;
413  n_left -= 1;
414  }
415 
416  vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
417 
418  return frame->n_vectors;
419 }
420 
422  vlib_node_runtime_t * node, vlib_frame_t * frame)
423 {
424  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
425  return l2learn_node_inline (vm, node, frame, 1 /* do_trace */ );
426  return l2learn_node_inline (vm, node, frame, 0 /* do_trace */ );
427 }
428 
429 /* *INDENT-OFF* */
430 VLIB_REGISTER_NODE (l2learn_node,static) = {
431  .name = "l2-learn",
432  .vector_size = sizeof (u32),
433  .format_trace = format_l2learn_trace,
434  .type = VLIB_NODE_TYPE_INTERNAL,
435 
436  .n_errors = ARRAY_LEN(l2learn_error_strings),
437  .error_strings = l2learn_error_strings,
438 
439  .n_next_nodes = L2LEARN_N_NEXT,
440 
441  /* edit / add dispositions here */
442  .next_nodes = {
443  [L2LEARN_NEXT_DROP] = "error-drop",
444  [L2LEARN_NEXT_L2FWD] = "l2-fwd",
445  },
446 };
447 /* *INDENT-ON* */
448 
449 #ifndef CLIB_MARCH_VARIANT
450 clib_error_t *
452 {
454 
455  mp->vlib_main = vm;
456  mp->vnet_main = vnet_get_main ();
457 
458  /* Initialize the feature next-node indexes */
460  l2learn_node.index,
464 
465  /* init the hash table ptr */
466  mp->mac_table = get_mac_table ();
467 
468  /*
469  * Set the default number of dynamically learned macs to the number
470  * of buckets.
471  */
473 
474  return 0;
475 }
476 
478 
479 
480 /**
481  * Set subinterface learn enable/disable.
482  * The CLI format is:
483  * set interface l2 learn <interface> [disable]
484  */
485 static clib_error_t *
487  unformat_input_t * input, vlib_cli_command_t * cmd)
488 {
489  vnet_main_t *vnm = vnet_get_main ();
490  clib_error_t *error = 0;
492  u32 enable;
493 
494  if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
495  {
496  error = clib_error_return (0, "unknown interface `%U'",
497  format_unformat_error, input);
498  goto done;
499  }
500 
501  enable = 1;
502  if (unformat (input, "disable"))
503  {
504  enable = 0;
505  }
506 
507  /* set the interface flag */
508  l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_LEARN, enable);
509 
510 done:
511  return error;
512 }
513 
514 /*?
515  * Layer 2 learning can be enabled and disabled on each
516  * interface and on each bridge-domain. Use this command to
517  * manage interfaces. It is enabled by default.
518  *
519  * @cliexpar
520  * Example of how to enable learning:
521  * @cliexcmd{set interface l2 learn GigabitEthernet0/8/0}
522  * Example of how to disable learning:
523  * @cliexcmd{set interface l2 learn GigabitEthernet0/8/0 disable}
524 ?*/
525 /* *INDENT-OFF* */
526 VLIB_CLI_COMMAND (int_learn_cli, static) = {
527  .path = "set interface l2 learn",
528  .short_help = "set interface l2 learn <interface> [disable]",
529  .function = int_learn,
530 };
531 /* *INDENT-ON* */
532 
533 
534 static clib_error_t *
536 {
538 
540  {
541  if (unformat (input, "limit %d", &mp->global_learn_limit))
542  ;
543 
544  else
545  return clib_error_return (0, "unknown input `%U'",
546  format_unformat_error, input);
547  }
548 
549  return 0;
550 }
551 
553 
554 #endif
555 
556 
557 /*
558  * fd.io coding-style-patch-verification: ON
559  *
560  * Local Variables:
561  * eval: (c-set-style "gnu")
562  * End:
563  */
u32 error_heap_index
Definition: node.h:348
u32 global_learn_count
Definition: l2_learn.h:32
u32 flags
Definition: vhost_user.h:115
vl_api_address_t src
Definition: vxlan_gbp.api:32
#define CLIB_UNUSED(x)
Definition: clib.h:82
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
#define PREDICT_TRUE(x)
Definition: clib.h:112
unsigned long u64
Definition: types.h:89
u64 raw
Definition: l2_fib.h:149
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:232
u8 src_address[6]
Definition: packet.h:56
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, u16 *next0, u8 timestamp)
Perform learning on one packet based on the mac table lookup result.
Definition: l2_learn.c:113
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:451
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
unformat_function_t unformat_vnet_sw_interface
#define VLIB_NODE_FN(node)
Definition: node.h:201
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:493
unsigned char u8
Definition: types.h:56
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
Definition: l2_fib.h:137
l2learn_main_t l2learn_main
Definition: l2_learn.c:33
#define static_always_inline
Definition: clib.h:99
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:163
u32 sw_if_index
Definition: vxlan_gbp.api:37
struct l2fib_entry_result_t_::@243::@245 fields
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, l2fib_entry_result_t *result0)
Lookup the entry for mac and bd_index in the mac table for 1 packet.
Definition: l2_fib.h:265
u8 dst_address[6]
Definition: packet.h:55
static BVT(clib_bihash)
Definition: adj_nbr.c:28
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:188
static void l2fib_entry_result_clear_bits(l2fib_entry_result_t *r, l2fib_entry_result_flags_t bits)
Definition: l2_fib.h:184
#define clib_error_return(e, args...)
Definition: error.h:99
unsigned int u32
Definition: types.h:88
#define VLIB_FRAME_SIZE
Definition: node.h:401
static char * l2learn_error_strings[]
Definition: l2_learn.c:96
vlib_error_main_t error_main
Definition: main.h:143
vnet_main_t * vnet_main
Definition: l2_learn.h:46
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:214
#define PREDICT_FALSE(x)
Definition: clib.h:111
#define VLIB_CONFIG_FUNCTION(x, n,...)
Definition: init.h:172
static_always_inline void l2fib_lookup_4(BVT(clib_bihash) *mac_table, l2fib_entry_key_t *cached_key, l2fib_entry_result_t *cached_result, const u8 *mac0, const u8 *mac1, const u8 *mac2, const 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, l2fib_entry_result_t *result0, l2fib_entry_result_t *result1, l2fib_entry_result_t *result2, l2fib_entry_result_t *result3)
Definition: l2_fib.h:357
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:241
static u8 * format_l2learn_trace(u8 *s, va_list *args)
Definition: l2_learn.c:64
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:139
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1150
u64 * counters
Definition: error.h:48
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
#define UNFORMAT_END_OF_INPUT
Definition: format.h:144
u16 n_vectors
Definition: node.h:420
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:79
vlib_main_t * vm
Definition: buffer.c:301
static_always_inline void vlib_buffer_enqueue_to_next(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, u16 *nexts, uword count)
Definition: buffer_node.h:332
vl_api_address_t dst
Definition: vxlan_gbp.api:33
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:79
static clib_error_t * l2learn_config(vlib_main_t *vm, unformat_input_t *input)
Definition: l2_learn.c:535
l2learn_next_t
Definition: l2_learn.c:102
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:486
#define ARRAY_LEN(x)
Definition: clib.h:62
u32 feat_next_node_index[32]
Definition: l2_learn.h:42
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:155
struct l2fib_entry_key_t::@235::@237 fields
l2learn_error_t
Definition: l2_learn.c:88
#define ASSERT(truth)
Definition: l2_fib.h:71
u32 l2input_intf_bitmap_enable(u32 sw_if_index, l2input_feat_masks_t feature_bitmap, u32 enable)
Enable (or disable) the feature in the bitmap for the given interface.
Definition: l2_input.c:530
size_t count
Definition: vapi.c:47
u32 global_learn_limit
Definition: l2_learn.h:35
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:57
struct _vlib_node_registration vlib_node_registration_t
u64 uword
Definition: types.h:112
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
vlib_main_t * vlib_main
Definition: l2_learn.h:45
#define vnet_buffer(b)
Definition: buffer.h:368
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
static foreach_l2fib_entry_result_attr void l2fib_entry_result_set_bits(l2fib_entry_result_t *r, l2fib_entry_result_flags_t bits)
Definition: l2_fib.h:177
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 vlib_get_buffers(vlib_main_t *vm, u32 *bi, vlib_buffer_t **b, int count)
Translate array of buffer indices into buffer pointers.
Definition: buffer_funcs.h:145
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:326
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
u32 client_pid
Definition: l2_learn.h:38
static vlib_node_registration_t l2learn_node
(constructor) VLIB_REGISTER_NODE (l2learn_node)
Definition: l2_learn.c:77
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:170