summaryrefslogtreecommitdiffstats
path: root/src/plugins/ioam/export-common/ioam_export.h
blob: e84dab0b398e3cc13ef53a55ad9a9a848afeff05 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef __included_ioam_export_h__
#define __included_ioam_export_h__

#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/ip/ip_packet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/ip/ip6_hop_by_hop.h>
#include <vnet/ip/udp.h>
#include <vnet/flow/ipfix_packet.h>

#include <vppinfra/pool.h>
#include <vppinfra/hash.h>
#include <vppinfra/error.h>
#include <vppinfra/elog.h>

#include <vlib/threads.h>

typedef struct ioam_export_buffer
{
  /* Allocated buffer */
  u32 buffer_index;
  u64 touched_at;
  u8 records_in_this_buffer;
} ioam_export_buffer_t;


typedef struct
{
  /* API message ID base */
  u16 msg_id_base;
  u16 set_id;

  /* TODO: to support multiple collectors all this has to be grouped and create a vector here */
  u8 *record_header;
  u32 sequence_number;
  u32 domain_id;

  /* ipfix collector, our ip address */
  ip4_address_t ipfix_collector;
  ip4_address_t src_address;

  /* Pool of ioam_export_buffer_t */
  ioam_export_buffer_t *buffer_pool;
  /* Vector of per thread ioam_export_buffer_t to buffer pool index */
  u32 *buffer_per_thread;
  /* Lock per thread to swap buffers between worker and timer process */
  volatile u32 **lockp;

  /* time scale transform */
  u32 unix_time_0;
  f64 vlib_time_0;

  /* convenience */
  vlib_main_t *vlib_main;
  vnet_main_t *vnet_main;
  ethernet_main_t *ethernet_main;
  u32 next_node_index;

  uword my_hbh_slot;
  u32 export_process_node_index;
} ioam_export_main_t;

extern ioam_export_main_t ioam_export_main;
extern ioam_export_main_t vxlan_gpe_ioam_export_main;

extern vlib_node_registration_t export_node;
extern vlib_node_registration_t vxlan_export_node;

#define DEFAULT_EXPORT_SIZE (3 * CLIB_CACHE_LINE_BYTES)
/*
 *  Number of records in a buffer
 * ~(MTU (1500) - [ip hdr(40) + UDP(8) + ipfix (24)]) / DEFAULT_EXPORT_SIZE
 */
#define DEFAULT_EXPORT_RECORDS 7

inline static void
ioam_export_set_next_node (ioam_export_main_t * em, u8 * next_node_name)
{
  vlib_node_t *next_node;

  next_node = vlib_get_node_by_name (em->vlib_main, next_node_name);
  em->next_node_index = next_node->index;
}

inline static void
ioam_export_reset_next_node (ioam_export_main_t * em)
{
  vlib_node_t *next_node;

  next_node = vlib_get_node_by_name (em->vlib_main, (u8 *) "ip4-lookup");
  em->next_node_index = next_node->index;
}

always_inline ioam_export_buffer_t *
ioam_export_get_my_buffer (ioam_export_main_t * em, u32 thread_id)
{

  if (vec_len (em->buffer_per_thread) > thread_id)
    return (pool_elt_at_index
	    (em->buffer_pool, em->buffer_per_thread[thread_id]));
  return (0);
}

inline static int
ioam_export_buffer_add_header (ioam_export_main_t * em, vlib_buffer_t * b0)
{
  clib_memcpy (b0->data, em->record_header, vec_len (em->record_header));
  b0->current_data = 0;
  b0->current_length = vec_len (em->record_header);
  b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
  return (1);
}

inline static int
ioam_export_init_buffer (ioam_export_main_t * em, vlib_main_t * vm,
			 ioam_export_buffer_t * eb)
{
  vlib_buffer_t *b = 0;

  if (!eb)
    return (-1);
  /* TODO: Perhaps buffer init from template here */
  if (vlib_buffer_alloc (vm, &(eb->buffer_index), 1) != 1)
    return (-2);
  eb->records_in_this_buffer = 0;
  eb->touched_at = vlib_time_now (vm);
  b = vlib_get_buffer (vm, eb->buffer_index);
  (void) ioam_export_buffer_add_header (em, b);
  vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
  vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0;
  return (1);
}

inline static void
ioam_export_thread_buffer_free (ioam_export_main_t * em)
{
  vlib_main_t *vm = em->vlib_main;
  ioam_export_buffer_t *eb = 0;
  int i;
  for (i = 0; i < vec_len (em->buffer_per_thread); i++)
    {
      eb = pool_elt_at_index (em->buffer_pool, em->buffer_per_thread[i]);
      if (eb)
	vlib_buffer_free (vm, &(eb->buffer_index), 1);
    }
  for (i = 0; i < vec_len (em->lockp); i++)
    clib_mem_free ((void *) em->lockp[i]);
  vec_free (em->buffer_per_thread);
  pool_free (em->buffer_pool);
  vec_free (em->lockp);
  em->buffer_per_thread = 0;
  em->buffer_pool = 0;
  em->lockp = 0;
}

inline static int
ioam_export_thread_buffer_init (ioam_export_main_t * em, vlib_main_t * vm)
{
  int no_of_threads = vec_len (vlib_worker_threads);
  int i;
  ioam_export_buffer_t *eb = 0;

  pool_alloc_aligned (em->buffer_pool,
		      no_of_threads - 1, CLIB_CACHE_LINE_BYTES);
  vec_validate_aligned (em->buffer_per_thread,
			no_of_threads - 1, CLIB_CACHE_LINE_BYTES);
  vec_validate_aligned (em->lockp, no_of_threads - 1, CLIB_CACHE_LINE_BYTES);

  if (!em->buffer_per_thread || !em->buffer_pool || !em->lockp)
    {
      return (-1);
    }
  for (i = 0; i < no_of_threads; i++)
    {
      eb = 0;
      pool_get_aligned (em->buffer_pool, eb, CLIB_CACHE_LINE_BYTES);
      memset (eb, 0, sizeof (*eb));
      em->buffer_per_thread[i] = eb - em->buffer_pool;
      if (ioam_export_init_buffer (em, vm, eb) != 1)
	{
	  ioam_export_thread_buffer_free (em);
	  return (-2);
	}
      em->lockp[i] = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
					     CLIB_CACHE_LINE_BYTES);
      memset ((void *) em->lockp[i], 0, CLIB_CACHE_LINE_BYTES);
    }
  return (1);
}

#define IPFIX_IOAM_EXPORT_ID 272
#define IPFIX_VXLAN_IOAM_EXPORT_ID 273

/* Used to build the rewrite */
/* data set packet */
typedef struct
{
  ipfix_message_header_t h;
  ipfix_set_header_t s;
} ipfix_data_packet_t;

typedef struct
{
  ip4_header_t ip4;
  udp_header_t udp;
  ipfix_data_packet_t ipfix;
} ip4_ipfix_data_packet_t;


inline static void
ioam_export_header_cleanup (ioam_export_main_t * em,
			    ip4_address_t * collector_address,
			    ip4_address_t * src_address)
{
  vec_free (em->record_header);
  em->record_header = 0;
}

inline static int
ioam_export_header_create (ioam_export_main_t * em,
			   ip4_address_t * collector_address,
			   ip4_address_t * src_address)
{
  ip4_header_t *ip;
  udp_header_t *udp;
  ipfix_message_header_t *h;
  ipfix_set_header_t *s;
  u8 *rewrite = 0;
  ip4_ipfix_data_packet_t *tp;


  /* allocate rewrite space */
  vec_validate_aligned (rewrite,
			sizeof (ip4_ipfix_data_packet_t) - 1,
			CLIB_CACHE_LINE_BYTES);

  tp = (ip4_ipfix_data_packet_t *) rewrite;
  ip = (ip4_header_t *) & tp->ip4;
  udp = (udp_header_t *) (ip + 1);
  h = (ipfix_message_header_t *) (udp + 1);
  s = (ipfix_set_header_t *) (h + 1);

  ip->ip_version_and_header_length = 0x45;
  ip->ttl = 254;
  ip->protocol = IP_PROTOCOL_UDP;
  ip->src_address.as_u32 = src_address->as_u32;
  ip->dst_address.as_u32 = collector_address->as_u32;
  udp->src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
  udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipfix);
  /* FIXUP: UDP length */
  udp->length = clib_host_to_net_u16 (vec_len (rewrite) +
				      (DEFAULT_EXPORT_RECORDS *
				       DEFAULT_EXPORT_SIZE) - sizeof (*ip));

  /* FIXUP: message header export_time */
  /* FIXUP: message header sequence_number */
  h->domain_id = clib_host_to_net_u32 (em->domain_id);

  /*FIXUP: Setid length in octets if records exported are not default */
  s->set_id_length = ipfix_set_id_length (em->set_id,
					  (sizeof (*s) +
					   (DEFAULT_EXPORT_RECORDS *
					    DEFAULT_EXPORT_SIZE)));

  /* FIXUP: h version and length length in octets if records exported are not default */
  h->version_length = version_length (sizeof (*h) +
				      (sizeof (*s) +
				       (DEFAULT_EXPORT_RECORDS *
					DEFAULT_EXPORT_SIZE)));

  /* FIXUP: ip length if records exported are not default */
  /* FIXUP: ip checksum if records exported are not default */
  ip->length = clib_host_to_net_u16 (vec_len (rewrite) +
				     (DEFAULT_EXPORT_RECORDS *
				      DEFAULT_EXPORT_SIZE));
  ip->checksum = ip4_header_checksum (ip);
  _vec_len (rewrite) = sizeof (ip4_ipfix_data_packet_t);
  em->record_header = rewrite;
  return (1);
}

inline static int
ioam_export_send_buffer (ioam_export_main_t * em, vlib_main_t * vm,
			 ioam_export_buffer_t * eb)
{
  ip4_header_t *ip;
  udp_header_t *udp;
  ipfix_message_header_t *h;
  ipfix_set_header_t *s;
  ip4_ipfix_data_packet_t *tp;
  vlib_buffer_t *b0;
  u16 new_l0, old_l0;
  ip_csum_t sum0;
  vlib_frame_t *nf = 0;
  u32 *to_next;

  b0 = vlib_get_buffer (vm, eb->buffer_index);
  tp = vlib_buffer_get_current (b0);
  ip = (ip4_header_t *) & tp->ip4;
  udp = (udp_header_t *) (ip + 1);
  h = (ipfix_message_header_t *) (udp + 1);
  s = (ipfix_set_header_t *) (h + 1);

  /* FIXUP: message header export_time */
  h->export_time = clib_host_to_net_u32 ((u32)
					 (((f64) em->unix_time_0) +
					  (vlib_time_now (em->vlib_main) -
					   em->vlib_time_0)));

  /* FIXUP: message header sequence_number */
  h->sequence_number = clib_host_to_net_u32 (em->sequence_number++);

  /* FIXUP: lengths if different from default */
  if (PREDICT_FALSE (eb->records_in_this_buffer != DEFAULT_EXPORT_RECORDS))
    {
      s->set_id_length = ipfix_set_id_length (em->set_id /* set_id */ ,
					      b0->current_length -
					      (sizeof (*ip) + sizeof (*udp) +
					       sizeof (*h)));
      h->version_length =
	version_length (b0->current_length - (sizeof (*ip) + sizeof (*udp)));
      sum0 = ip->checksum;
      old_l0 = ip->length;
      new_l0 = clib_host_to_net_u16 ((u16) b0->current_length);
      sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
			     length /* changed member */ );
      ip->checksum = ip_csum_fold (sum0);
      ip->length = new_l0;
      udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
    }

  /* Enqueue pkts to ip4-lookup */

  nf = vlib_get_frame_to_node (vm, em->next_node_index);
  nf->n_vectors = 0;
  to_next = vlib_frame_vector_args (nf);
  nf->n_vectors = 1;
  to_next[0] = eb->buffer_index;
  vlib_put_frame_to_node (vm, em->next_node_index, nf);
  return (1);

}

#define EXPORT_TIMEOUT (20.0)
#define THREAD_PERIOD (30.0)
inline static uword
ioam_export_process_common (ioam_export_main_t * em, vlib_main_t * vm,
			    vlib_node_runtime_t * rt, vlib_frame_t * f,
			    u32 index)
{
  f64 now;
  f64 timeout = 30.0;
  uword event_type;
  uword *event_data = 0;
  int i;
  ioam_export_buffer_t *eb = 0, *new_eb = 0;
  u32 *vec_buffer_indices = 0;
  u32 *vec_buffer_to_be_sent = 0;
  u32 *thread_index = 0;
  u32 new_pool_index = 0;

  em->export_process_node_index = index;
  /* Wait for Godot... */
  vlib_process_wait_for_event_or_clock (vm, 1e9);
  event_type = vlib_process_get_events (vm, &event_data);
  if (event_type != 1)
    clib_warning ("bogus kickoff event received, %d", event_type);
  vec_reset_length (event_data);

  while (1)
    {
      vlib_process_wait_for_event_or_clock (vm, timeout);
      event_type = vlib_process_get_events (vm, &event_data);
      switch (event_type)
	{
	case 2:		/* Stop and Wait for kickoff again */
	  timeout = 1e9;
	  break;
	case 1:		/* kickoff : Check for unsent buffers */
	  timeout = THREAD_PERIOD;
	  break;
	case ~0:		/* timeout */
	  break;
	}
      vec_reset_length (event_data);
      now = vlib_time_now (vm);
      /*
       * Create buffers for threads that are not active enough
       * to send out the export records
       */
      for (i = 0; i < vec_len (em->buffer_per_thread); i++)
	{
	  /* If the worker thread is processing export records ignore further checks */
	  if (*em->lockp[i] == 1)
	    continue;
	  eb = pool_elt_at_index (em->buffer_pool, em->buffer_per_thread[i]);
	  if (eb->records_in_this_buffer > 0
	      && now > (eb->touched_at + EXPORT_TIMEOUT))
	    {
	      pool_get_aligned (em->buffer_pool, new_eb,
				CLIB_CACHE_LINE_BYTES);
	      memset (new_eb, 0, sizeof (*new_eb));
	      if (ioam_export_init_buffer (em, vm, new_eb) == 1)
		{
		  new_pool_index = new_eb - em->buffer_pool;
		  vec_add (vec_buffer_indices, &new_pool_index, 1);
		  vec_add (vec_buffer_to_be_sent, &em->buffer_per_thread[i],
			   1);
		  vec_add (thread_index, &i, 1);
		}
	      else
		{
		  pool_put (em->buffer_pool, new_eb);
		  /*Give up */
		  goto CLEANUP;
		}
	    }
	}
      if (vec_len (thread_index) != 0)
	{
	  /*
	   * Now swap the buffers out
	   */
	  for (i = 0; i < vec_len (thread_index); i++)
	    {
	      while (__sync_lock_test_and_set (em->lockp[thread_index[i]], 1))
		;
	      em->buffer_per_thread[thread_index[i]] =
		vec_pop (vec_buffer_indices);
	      *em->lockp[thread_index[i]] = 0;
	    }

	  /* Send the buffers */
	  for (i = 0; i < vec_len (vec_buffer_to_be_sent); i++)
	    {
	      eb =
		pool_elt_at_index (em->buffer_pool, vec_buffer_to_be_sent[i]);
	      ioam_export_send_buffer (em, vm, eb);
	      pool_put (em->buffer_pool, eb);
	    }
	}

    CLEANUP:
      /* Free any leftover/unused buffers and everything that was allocated */
      for (i = 0; i < vec_len (vec_buffer_indices); i++)
	{
	  new_eb = pool_elt_at_index (em->buffer_pool, vec_buffer_indices[i]);
	  vlib_buffer_free (vm, &new_eb->buffer_index, 1);
	  pool_put (em->buffer_pool, new_eb);
	}
      vec_free (vec_buffer_indices);
      vec_free (vec_buffer_to_be_sent);
      vec_free (thread_index);
    }
  return 0;			/* not so much */
}

#define ioam_export_node_common(EM, VM, N, F, HTYPE, L, V, NEXT, FIXUP_FUNC)   \
do {                                                                           \
  u32 n_left_from, *from, *to_next;                                            \
  export_next_t next_index;                                                    \
  u32 pkts_recorded = 0;                                                       \
  ioam_export_buffer_t *my_buf = 0;                                            \
  vlib_buffer_t *eb0 = 0;                                                      \
  u32 ebi0 = 0;                                                                \
  from = vlib_frame_vector_args (F);                                           \
  n_left_from = (F)->n_vectors;                                                \
  next_index = (N)->cached_next_index;                                         \
  while (__sync_lock_test_and_set ((EM)->lockp[(VM)->cpu_index], 1));          \
  my_buf = ioam_export_get_my_buffer (EM, (VM)->cpu_index);                    \
  my_buf->touched_at = vlib_time_now (VM);                                     \
  while (n_left_from > 0)                                                      \
    {                                                                          \
      u32 n_left_to_next;                                                      \
      vlib_get_next_frame (VM, N, next_index, to_next, n_left_to_next);        \
      while (n_left_from >= 4 && n_left_to_next >= 2)                          \
	{                                                                      \
	  u32 next0 = NEXT;                                                    \
	  u32 next1 = NEXT;                                                    \
	  u32 bi0, bi1;                                                        \
	  HTYPE *ip0, *ip1;                                                    \
	  vlib_buffer_t *p0, *p1;                                              \
	  u32 ip_len0, ip_len1;                                                \
	  {                                                                    \
	    vlib_buffer_t *p2, *p3;                                            \
	    p2 = vlib_get_buffer (VM, from[2]);                                \
	    p3 = vlib_get_buffer (VM, from[3]);                                \
	    vlib_prefetch_buffer_header (p2, LOAD);                            \
	    vlib_prefetch_buffer_header (p3, LOAD);                            \
	    CLIB_PREFETCH (p2->data, 3 * CLIB_CACHE_LINE_BYTES, LOAD);         \
	    CLIB_PREFETCH (p3->data, 3 * CLIB_CACHE_LINE_BYTES, LOAD);         \
	  }                                                                    \
	  to_next[0] = bi0 = from[0];                                          \
	  to_next[1] = bi1 = from[1];                                          \
	  from += 2;                                                           \
	  to_next += 2;                                                        \
	  n_left_from -= 2;                                                    \
	  n_left_to_next -= 2;                                                 \
	  p0 = vlib_get_buffer (VM, bi0);                                      \
	  p1 = vlib_get_buffer (VM, bi1);                                      \
	  ip0 = vlib_buffer_get_current (p0);                                  \
	  ip1 = vlib_buffer_get_current (p1);                                  \
	  ip_len0 =                                                            \
	    clib_net_to_host_u16 (ip0->L) + sizeof (HTYPE);                    \
	  ip_len1 =                                                            \
	    clib_net_to_host_u16 (ip1->L) + sizeof (HTYPE);                    \
	  ebi0 = my_buf->buffer_index;                                         \
	  eb0 = vlib_get_buffer (VM, ebi0);                                    \
	  if (PREDICT_FALSE (eb0 == 0))                                        \
	    goto NO_BUFFER1;                                                   \
	  ip_len0 =                                                            \
	    ip_len0 > DEFAULT_EXPORT_SIZE ? DEFAULT_EXPORT_SIZE : ip_len0;     \
	  ip_len1 =                                                            \
	    ip_len1 > DEFAULT_EXPORT_SIZE ? DEFAULT_EXPORT_SIZE : ip_len1;     \
	  copy3cachelines (eb0->data + eb0->current_length, ip0, ip_len0);     \
	  FIXUP_FUNC(eb0, p0);                                                 \
	  eb0->current_length += DEFAULT_EXPORT_SIZE;                          \
	  my_buf->records_in_this_buffer++;                                    \
	  if (my_buf->records_in_this_buffer >= DEFAULT_EXPORT_RECORDS)        \
	    {                                                                  \
	      ioam_export_send_buffer (EM, VM, my_buf);                        \
	      ioam_export_init_buffer (EM, VM, my_buf);                        \
	    }                                                                  \
	  ebi0 = my_buf->buffer_index;                                         \
	  eb0 = vlib_get_buffer (VM, ebi0);                                    \
	  if (PREDICT_FALSE (eb0 == 0))                                        \
	    goto NO_BUFFER1;                                                   \
	  copy3cachelines (eb0->data + eb0->current_length, ip1, ip_len1);     \
	  FIXUP_FUNC(eb0, p1);                                                 \
	  eb0->current_length += DEFAULT_EXPORT_SIZE;                          \
	  my_buf->records_in_this_buffer++;                                    \
	  if (my_buf->records_in_this_buffer >= DEFAULT_EXPORT_RECORDS)        \
	    {                                                                  \
	      ioam_export_send_buffer (EM, VM, my_buf);                        \
	      ioam_export_init_buffer (EM, VM, my_buf);                        \
	    }                                                                  \
	  pkts_recorded += 2;                                                  \
	  if (PREDICT_FALSE (((node)->flags & VLIB_NODE_FLAG_TRACE)))          \
	    {                                                                  \
	      if (p0->flags & VLIB_BUFFER_IS_TRACED)                           \
		{                                                              \
		  export_trace_t *t =                                          \
		    vlib_add_trace (VM, node, p0, sizeof (*t));                \
		  t->flow_label =                                              \
		    clib_net_to_host_u32 (ip0->V);                             \
		  t->next_index = next0;                                       \
		}                                                              \
	      if (p1->flags & VLIB_BUFFER_IS_TRACED)                           \
		{                                                              \
		  export_trace_t *t =                                          \
		    vlib_add_trace (VM, N, p1, sizeof (*t));                   \
		  t->flow_label =                                              \
		    clib_net_to_host_u32 (ip1->V);                             \
		  t->next_index = next1;                                       \
		}                                                              \
	    }                                                                  \
	NO_BUFFER1:                                                            \
	  vlib_validate_buffer_enqueue_x2 (VM, N, next_index,                  \
					   to_next, n_left_to_next,            \
					   bi0, bi1, next0, next1);            \
	}                                                                      \
      while (n_left_from > 0 && n_left_to_next > 0)                            \
	{                                                                      \
	  u32 bi0;                                                             \
	  vlib_buffer_t *p0;                                                   \
	  u32 next0 = NEXT;                                                    \
	  HTYPE *ip0;                                                          \
	  u32 ip_len0;                                                         \
	  bi0 = from[0];                                                       \
	  to_next[0] = bi0;                                                    \
	  from += 1;                                                           \
	  to_next += 1;                                                        \
	  n_left_from -= 1;                                                    \
	  n_left_to_next -= 1;                                                 \
	  p0 = vlib_get_buffer (VM, bi0);                                      \
	  ip0 = vlib_buffer_get_current (p0);                                  \
	  ip_len0 =                                                            \
	    clib_net_to_host_u16 (ip0->L) + sizeof (HTYPE);                    \
	  ebi0 = my_buf->buffer_index;                                         \
	  eb0 = vlib_get_buffer (VM, ebi0);                                    \
	  if (PREDICT_FALSE (eb0 == 0))                                        \
	    goto NO_BUFFER;                                                    \
	  ip_len0 =                                                            \
	    ip_len0 > DEFAULT_EXPORT_SIZE ? DEFAULT_EXPORT_SIZE : ip_len0;     \
	  copy3cachelines (eb0->data + eb0->current_length, ip0, ip_len0);     \
	  FIXUP_FUNC(eb0, p0);                                                 \
	  eb0->current_length += DEFAULT_EXPORT_SIZE;                          \
	  my_buf->records_in_this_buffer++;                                    \
	  if (my_buf->records_in_this_buffer >= DEFAULT_EXPORT_RECORDS)        \
	    {                                                                  \
	      ioam_export_send_buffer (EM, VM, my_buf);                        \
	      ioam_export_init_buffer (EM, VM, my_buf);                        \
	    }                                                                  \
	  if (PREDICT_FALSE (((N)->flags & VLIB_NODE_FLAG_TRACE)               \
			     && (p0->flags & VLIB_BUFFER_IS_TRACED)))          \
	    {                                                                  \
	      export_trace_t *t = vlib_add_trace (VM, (N), p0, sizeof (*t));   \
	      t->flow_label =                                                  \
		clib_net_to_host_u32 (ip0->V);                                 \
	      t->next_index = next0;                                           \
	    }                                                                  \
	  pkts_recorded += 1;                                                  \
	NO_BUFFER:                                                             \
	  vlib_validate_buffer_enqueue_x1 (VM, N, next_index,                  \
					   to_next, n_left_to_next,            \
					   bi0, next0);                        \
	}                                                                      \
      vlib_put_next_frame (VM, N, next_index, n_left_to_next);                 \
    }                                                                          \
  vlib_node_increment_counter (VM, export_node.index,                          \
			       EXPORT_ERROR_RECORDED, pkts_recorded);          \
  *(EM)->lockp[(VM)->cpu_index] = 0;                                           \
} while(0)

#endif /* __included_ioam_export_h__ */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */