aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/session/node.c
blob: 56e626379a52c18e0fdcbf1fee2320b19d87229d (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
/*
 * Copyright (c) 2017 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.
 */

#include <math.h>
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/tcp/tcp.h>
#include <vppinfra/elog.h>
#include <vnet/session/application.h>
#include <vnet/session/session_debug.h>
#include <vlibmemory/unix_shared_memory_queue.h>

vlib_node_registration_t session_queue_node;

typedef struct
{
  u32 session_index;
  u32 server_thread_index;
} session_queue_trace_t;

/* packet trace format function */
static u8 *
format_session_queue_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);

  s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
	      t->session_index, t->server_thread_index);
  return s;
}

vlib_node_registration_t session_queue_node;

#define foreach_session_queue_error		\
_(TX, "Packets transmitted")                  	\
_(TIMER, "Timer events")			\
_(NO_BUFFER, "Out of buffers")

typedef enum
{
#define _(sym,str) SESSION_QUEUE_ERROR_##sym,
  foreach_session_queue_error
#undef _
    SESSION_QUEUE_N_ERROR,
} session_queue_error_t;

static char *session_queue_error_strings[] = {
#define _(sym,string) string,
  foreach_session_queue_error
#undef _
};

static u32 session_type_to_next[] = {
  SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT,
  SESSION_QUEUE_NEXT_IP4_LOOKUP,
  SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT,
  SESSION_QUEUE_NEXT_IP6_LOOKUP,
};

always_inline void
session_tx_fifo_chain_tail (session_manager_main_t * smm, vlib_main_t * vm,
			    u8 thread_index, svm_fifo_t * fifo,
			    vlib_buffer_t * b0, u32 bi0, u8 n_bufs_per_seg,
			    u32 * left_to_snd0, u16 * n_bufs, u32 * rx_offset,
			    u16 deq_per_buf, u8 peek_data)
{
  vlib_buffer_t *chain_b0, *prev_b0;
  u32 chain_bi0;
  u16 len_to_deq0, n_bytes_read;
  u8 *data0, j;

  chain_bi0 = bi0;
  chain_b0 = b0;
  for (j = 1; j < n_bufs_per_seg; j++)
    {
      prev_b0 = chain_b0;
      len_to_deq0 = clib_min (*left_to_snd0, deq_per_buf);

      *n_bufs -= 1;
      chain_bi0 = smm->tx_buffers[thread_index][*n_bufs];
      _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;

      chain_b0 = vlib_get_buffer (vm, chain_bi0);
      chain_b0->current_data = 0;
      data0 = vlib_buffer_get_current (chain_b0);
      if (peek_data)
	{
	  n_bytes_read = svm_fifo_peek (fifo, *rx_offset, len_to_deq0, data0);
	  *rx_offset += n_bytes_read;
	}
      else
	{
	  n_bytes_read = svm_fifo_dequeue_nowait (fifo, len_to_deq0, data0);
	}
      ASSERT (n_bytes_read == len_to_deq0);
      chain_b0->current_length = n_bytes_read;
      b0->total_length_not_including_first_buffer += chain_b0->current_length;

      /* update previous buffer */
      prev_b0->next_buffer = chain_bi0;
      prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;

      /* update current buffer */
      chain_b0->next_buffer = 0;

      *left_to_snd0 -= n_bytes_read;
      if (*left_to_snd0 == 0)
	break;
    }
}

always_inline int
session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
				session_manager_main_t * smm,
				session_fifo_event_t * e0,
				stream_session_t * s0, u32 thread_index,
				int *n_tx_packets, u8 peek_data)
{
  u32 n_trace = vlib_get_trace_count (vm, node);
  u32 left_to_snd0, max_len_to_snd0, len_to_deq0, snd_space0;
  u32 n_bufs_per_evt, n_frames_per_evt;
  transport_connection_t *tc0;
  transport_proto_vft_t *transport_vft;
  u32 next_index, next0, *to_next, n_left_to_next, bi0;
  vlib_buffer_t *b0;
  u32 rx_offset = 0, max_dequeue0, n_bytes_per_seg;
  u16 snd_mss0, n_bufs_per_seg, n_bufs;
  u8 *data0;
  int i, n_bytes_read;
  u32 n_bytes_per_buf, deq_per_buf;
  u32 buffers_allocated, buffers_allocated_this_call;

  next_index = next0 = session_type_to_next[s0->session_type];

  transport_vft = session_get_transport_vft (s0->session_type);
  tc0 = transport_vft->get_connection (s0->connection_index, thread_index);

  /* Make sure we have space to send and there's something to dequeue */
  snd_mss0 = transport_vft->send_mss (tc0);
  snd_space0 = transport_vft->send_space (tc0);

  /* Can't make any progress */
  if (snd_space0 == 0 || snd_mss0 == 0)
    {
      vec_add1 (smm->pending_event_vector[thread_index], *e0);
      return 0;
    }

  if (peek_data)
    {
      /* Offset in rx fifo from where to peek data  */
      rx_offset = transport_vft->tx_fifo_offset (tc0);
    }

  /* Check how much we can pull. If buffering, subtract the offset */
  max_dequeue0 = svm_fifo_max_dequeue (s0->server_tx_fifo) - rx_offset;

  /* Nothing to read return */
  if (max_dequeue0 == 0)
    {
      svm_fifo_unset_event (s0->server_tx_fifo);
      return 0;
    }

  /* Ensure we're not writing more than transport window allows */
  if (max_dequeue0 < snd_space0)
    {
      /* Constrained by tx queue. Try to send only fully formed segments */
      max_len_to_snd0 = (max_dequeue0 > snd_mss0) ?
	max_dequeue0 - max_dequeue0 % snd_mss0 : max_dequeue0;
      /* TODO Nagle ? */
    }
  else
    {
      max_len_to_snd0 = snd_space0;
    }

  n_bytes_per_buf = vlib_buffer_free_list_buffer_size
    (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
  n_bytes_per_seg = MAX_HDRS_LEN + snd_mss0;
  n_bufs_per_seg = ceil ((double) n_bytes_per_seg / n_bytes_per_buf);
  n_bufs_per_evt = (ceil ((double) max_len_to_snd0 / n_bytes_per_seg))
    * n_bufs_per_seg;
  n_frames_per_evt = ceil ((double) n_bufs_per_evt / VLIB_FRAME_SIZE);

  deq_per_buf = clib_min (snd_mss0, n_bytes_per_buf);

  n_bufs = vec_len (smm->tx_buffers[thread_index]);
  left_to_snd0 = max_len_to_snd0;
  for (i = 0; i < n_frames_per_evt; i++)
    {
      /* Make sure we have at least one full frame of buffers ready */
      if (PREDICT_FALSE (n_bufs < VLIB_FRAME_SIZE))
	{
	  vec_validate (smm->tx_buffers[thread_index],
			n_bufs + 2 * VLIB_FRAME_SIZE - 1);

	  buffers_allocated = 0;
	  do
	    {
	      buffers_allocated_this_call =
		vlib_buffer_alloc
		(vm,
		 &smm->tx_buffers[thread_index][n_bufs + buffers_allocated],
		 2 * VLIB_FRAME_SIZE - buffers_allocated);
	      buffers_allocated += buffers_allocated_this_call;
	    }
	  while (buffers_allocated_this_call > 0
		 && ((buffers_allocated + n_bufs < VLIB_FRAME_SIZE)));

	  n_bufs += buffers_allocated;

	  _vec_len (smm->tx_buffers[thread_index]) = n_bufs;

	  if (PREDICT_FALSE (n_bufs < VLIB_FRAME_SIZE))
	    {
	      vec_add1 (smm->pending_event_vector[thread_index], *e0);
	      return -1;
	    }
	}
      /* Allow enqueuing of a new event */
      svm_fifo_unset_event (s0->server_tx_fifo);

      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
      while (left_to_snd0 && n_left_to_next >= n_bufs_per_seg)
	{
	  /*
	   * Handle first buffer in chain separately
	   */

	  /* Get free buffer */
	  ASSERT (n_bufs >= 1);
	  bi0 = smm->tx_buffers[thread_index][--n_bufs];
	  ASSERT (bi0);
	  _vec_len (smm->tx_buffers[thread_index]) = n_bufs;

	  /* usual speculation, or the enqueue_x1 macro will barf */
	  to_next[0] = bi0;
	  to_next += 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);
	  b0->error = 0;
	  b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID
	    | VNET_BUFFER_LOCALLY_ORIGINATED;
	  b0->current_data = 0;
	  b0->total_length_not_including_first_buffer = 0;

	  len_to_deq0 = clib_min (left_to_snd0, deq_per_buf);

	  data0 = vlib_buffer_make_headroom (b0, MAX_HDRS_LEN);
	  if (peek_data)
	    {
	      n_bytes_read = svm_fifo_peek (s0->server_tx_fifo, rx_offset,
					    len_to_deq0, data0);
	      /* Keep track of progress locally, transport is also supposed to
	       * increment it independently when pushing the header */
	      rx_offset += n_bytes_read;
	    }
	  else
	    {
	      n_bytes_read = svm_fifo_dequeue_nowait (s0->server_tx_fifo,
						      len_to_deq0, data0);
	    }

	  if (n_bytes_read <= 0)
	    goto dequeue_fail;

	  b0->current_length = n_bytes_read;

	  left_to_snd0 -= n_bytes_read;
	  *n_tx_packets = *n_tx_packets + 1;

	  /*
	   * Fill in the remaining buffers in the chain, if any
	   */
	  if (PREDICT_FALSE (n_bufs_per_seg > 1))
	    session_tx_fifo_chain_tail (smm, vm, thread_index,
					s0->server_tx_fifo, b0, bi0,
					n_bufs_per_seg, &left_to_snd0,
					&n_bufs, &rx_offset, deq_per_buf,
					peek_data);

	  /* Ask transport to push header after current_length and
	   * total_length_not_including_first_buffer are updated */
	  transport_vft->push_header (tc0, b0);

	  /* *INDENT-OFF* */
	  SESSION_EVT_DBG(SESSION_EVT_DEQ, s0, ({
	      ed->data[0] = e0->event_id;
	      ed->data[1] = max_dequeue0;
	      ed->data[2] = len_to_deq0;
	      ed->data[3] = left_to_snd0;
	  }));
	  /* *INDENT-ON* */


	  VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
	  if (PREDICT_FALSE (n_trace > 0))
	    {
	      session_queue_trace_t *t0;
	      vlib_trace_buffer (vm, node, next_index, b0,
				 1 /* follow_chain */ );
	      vlib_set_trace_count (vm, node, --n_trace);
	      t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
	      t0->session_index = s0->session_index;
	      t0->server_thread_index = s0->thread_index;
	    }

	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
					   to_next, n_left_to_next,
					   bi0, next0);
	}
      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }

  /* If we couldn't dequeue all bytes mark as partially read */
  if (max_len_to_snd0 < max_dequeue0)
    {
      /* If we don't already have new event */
      if (svm_fifo_set_event (s0->server_tx_fifo))
	{
	  vec_add1 (smm->pending_event_vector[thread_index], *e0);
	}
    }
  return 0;

dequeue_fail:
  /*
   * Can't read from fifo. If we don't already have an event, save as partially
   * read, return buff to free list and return
   */
  clib_warning ("dequeue fail");

  if (svm_fifo_set_event (s0->server_tx_fifo))
    {
      vec_add1 (smm->pending_event_vector[thread_index], *e0);
    }
  vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1);
  _vec_len (smm->tx_buffers[thread_index]) += 1;

  return 0;
}

int
session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
			      session_manager_main_t * smm,
			      session_fifo_event_t * e0,
			      stream_session_t * s0, u32 thread_index,
			      int *n_tx_pkts)
{
  return session_tx_fifo_read_and_snd_i (vm, node, smm, e0, s0, thread_index,
					 n_tx_pkts, 1);
}

int
session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
				 session_manager_main_t * smm,
				 session_fifo_event_t * e0,
				 stream_session_t * s0, u32 thread_index,
				 int *n_tx_pkts)
{
  return session_tx_fifo_read_and_snd_i (vm, node, smm, e0, s0, thread_index,
					 n_tx_pkts, 0);
}

always_inline stream_session_t *
session_event_get_session (session_fifo_event_t * e, u8 thread_index)
{
  ASSERT (e->fifo->master_thread_index == thread_index);
  return stream_session_get_if_valid (e->fifo->master_session_index,
				      thread_index);
}

void
dump_thread_0_event_queue (void)
{
  session_manager_main_t *smm = vnet_get_session_manager_main ();
  vlib_main_t *vm = &vlib_global_main;
  u32 my_thread_index = vm->thread_index;
  session_fifo_event_t _e, *e = &_e;
  stream_session_t *s0;
  int i, index;
  i8 *headp;

  unix_shared_memory_queue_t *q;
  q = smm->vpp_event_queues[my_thread_index];

  index = q->head;

  for (i = 0; i < q->cursize; i++)
    {
      headp = (i8 *) (&q->data[0] + q->elsize * index);
      clib_memcpy (e, headp, q->elsize);

      switch (e->event_type)
	{
	case FIFO_EVENT_APP_TX:
	  s0 = session_event_get_session (e, my_thread_index);
	  fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
	  break;

	case FIFO_EVENT_DISCONNECT:
	  s0 = stream_session_get_from_handle (e->session_handle);
	  fformat (stdout, "[%04d] disconnect session %d\n", i,
		   s0->session_index);
	  break;

	case FIFO_EVENT_BUILTIN_RX:
	  s0 = session_event_get_session (e, my_thread_index);
	  fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
	  break;

	case FIFO_EVENT_RPC:
	  fformat (stdout, "[%04d] RPC call %llx with %llx\n",
		   i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
	  break;

	default:
	  fformat (stdout, "[%04d] unhandled event type %d\n",
		   i, e->event_type);
	  break;
	}

      index++;

      if (index == q->maxsize)
	index = 0;
    }
}

static uword
session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
		       vlib_frame_t * frame)
{
  session_manager_main_t *smm = vnet_get_session_manager_main ();
  session_fifo_event_t *my_pending_event_vector, *e;
  session_fifo_event_t *my_fifo_events;
  u32 n_to_dequeue, n_events;
  unix_shared_memory_queue_t *q;
  application_t *app;
  int n_tx_packets = 0;
  u32 my_thread_index = vm->thread_index;
  int i, rv;
  f64 now = vlib_time_now (vm);
  void (*fp) (void *);

  SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, my_thread_index);

  /*
   *  Update TCP time
   */
  tcp_update_time (now, my_thread_index);

  /*
   * Get vpp queue events
   */
  q = smm->vpp_event_queues[my_thread_index];
  if (PREDICT_FALSE (q == 0))
    return 0;

  my_fifo_events = smm->free_event_vector[my_thread_index];

  /* min number of events we can dequeue without blocking */
  n_to_dequeue = q->cursize;
  my_pending_event_vector = smm->pending_event_vector[my_thread_index];

  if (n_to_dequeue == 0 && vec_len (my_pending_event_vector) == 0)
    return 0;

  SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);

  /*
   * If we didn't manage to process previous events try going
   * over them again without dequeuing new ones.
   */
  /* XXX: Block senders to sessions that can't keep up */
  if (0 && vec_len (my_pending_event_vector) >= 100)
    {
      clib_warning ("too many fifo events unsolved");
      goto skip_dequeue;
    }

  /* See you in the next life, don't be late */
  if (pthread_mutex_trylock (&q->mutex))
    return 0;

  for (i = 0; i < n_to_dequeue; i++)
    {
      vec_add2 (my_fifo_events, e, 1);
      unix_shared_memory_queue_sub_raw (q, (u8 *) e);
    }

  /* The other side of the connection is not polling */
  if (q->cursize < (q->maxsize / 8))
    (void) pthread_cond_broadcast (&q->condvar);
  pthread_mutex_unlock (&q->mutex);

  vec_append (my_fifo_events, my_pending_event_vector);

  _vec_len (my_pending_event_vector) = 0;
  smm->pending_event_vector[my_thread_index] = my_pending_event_vector;

skip_dequeue:
  n_events = vec_len (my_fifo_events);
  for (i = 0; i < n_events; i++)
    {
      stream_session_t *s0;	/* $$$ prefetch 1 ahead maybe */
      session_fifo_event_t *e0;

      e0 = &my_fifo_events[i];

      switch (e0->event_type)
	{
	case FIFO_EVENT_APP_TX:
	  s0 = session_event_get_session (e0, my_thread_index);

	  if (CLIB_DEBUG && !s0)
	    {
	      clib_warning ("It's dead, Jim!");
	      continue;
	    }

	  if (PREDICT_FALSE (s0->session_state == SESSION_STATE_CLOSED))
	    continue;
	  /* Spray packets in per session type frames, since they go to
	   * different nodes */
	  rv = (smm->session_tx_fns[s0->session_type]) (vm, node, smm, e0, s0,
							my_thread_index,
							&n_tx_packets);
	  /* Out of buffers */
	  if (PREDICT_FALSE (rv < 0))
	    {
	      vlib_node_increment_counter (vm, node->node_index,
					   SESSION_QUEUE_ERROR_NO_BUFFER, 1);
	      continue;
	    }
	  break;
	case FIFO_EVENT_DISCONNECT:
	  s0 = stream_session_get_from_handle (e0->session_handle);
	  stream_session_disconnect (s0);
	  break;
	case FIFO_EVENT_BUILTIN_RX:
	  s0 = session_event_get_session (e0, my_thread_index);
	  svm_fifo_unset_event (s0->server_rx_fifo);
	  app = application_get (s0->app_index);
	  app->cb_fns.builtin_server_rx_callback (s0);
	  break;
	case FIFO_EVENT_RPC:
	  fp = e0->rpc_args.fp;
	  (*fp) (e0->rpc_args.arg);
	  break;

	default:
	  clib_warning ("unhandled event type %d", e0->event_type);
	}
    }

  _vec_len (my_fifo_events) = 0;
  smm->free_event_vector[my_thread_index] = my_fifo_events;

  vlib_node_increment_counter (vm, session_queue_node.index,
			       SESSION_QUEUE_ERROR_TX, n_tx_packets);

  SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 1);

  return n_tx_packets;
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (session_queue_node) =
{
  .function = session_queue_node_fn,
  .name = "session-queue",
  .format_trace = format_session_queue_trace,
  .type = VLIB_NODE_TYPE_INPUT,
  .n_errors = ARRAY_LEN (session_queue_error_strings),
  .error_strings = session_queue_error_strings,
  .n_next_nodes = SESSION_QUEUE_N_NEXT,
  .state = VLIB_NODE_STATE_DISABLED,
  .next_nodes =
  {
      [SESSION_QUEUE_NEXT_DROP] = "error-drop",
      [SESSION_QUEUE_NEXT_IP4_LOOKUP] = "ip4-lookup",
      [SESSION_QUEUE_NEXT_IP6_LOOKUP] = "ip6-lookup",
      [SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT] = "tcp4-output",
      [SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT] = "tcp6-output",
  },
};
/* *INDENT-ON* */

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