FD.io VPP  v19.08.1-401-g8e4ed521a
Vector Packet Processing
session_node.c
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1 /*
2  * Copyright (c) 2017-2019 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #include <math.h>
17 #include <vlib/vlib.h>
18 #include <vnet/vnet.h>
19 #include <vppinfra/elog.h>
20 #include <vnet/session/transport.h>
21 #include <vnet/session/session.h>
26 #include <svm/queue.h>
27 
28 #define app_check_thread_and_barrier(_fn, _arg) \
29  if (!vlib_thread_is_main_w_barrier ()) \
30  { \
31  vlib_rpc_call_main_thread (_fn, (u8 *) _arg, sizeof(*_arg)); \
32  return; \
33  }
34 
35 static void
37 {
39  vnet_listen_args_t _a, *a = &_a;
40  app_worker_t *app_wrk;
41  application_t *app;
42  int rv;
43 
45 
46  app = application_lookup (mp->client_index);
47  if (!app)
48  return;
49 
50  clib_memset (a, 0, sizeof (*a));
51  a->sep.is_ip4 = mp->is_ip4;
52  clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
53  a->sep.port = mp->port;
54  a->sep.fib_index = mp->vrf;
55  a->sep.sw_if_index = ENDPOINT_INVALID_INDEX;
56  a->sep.transport_proto = mp->proto;
57  a->app_index = app->app_index;
58  a->wrk_map_index = mp->wrk_index;
59 
60  if ((rv = vnet_listen (a)))
61  clib_warning ("listen returned: %d", rv);
62 
63  app_wrk = application_get_worker (app, mp->wrk_index);
64  mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
65  return;
66 }
67 
68 static void
70 {
72  vnet_listen_args_t _a, *a = &_a;
73  app_worker_t *app_wrk;
74  application_t *app;
75  int rv;
76 
78 
79  app = application_lookup (mp->client_index);
80  if (!app)
81  return;
82 
83  clib_memset (a, 0, sizeof (*a));
84  a->uri = (char *) mp->uri;
85  a->app_index = app->app_index;
86  rv = vnet_bind_uri (a);
87 
88  app_wrk = application_get_worker (app, 0);
89  mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
90 }
91 
92 static void
94 {
96  vnet_connect_args_t _a, *a = &_a;
97  app_worker_t *app_wrk;
98  application_t *app;
99  int rv;
100 
102 
103  app = application_lookup (mp->client_index);
104  if (!app)
105  return;
106 
107  clib_memset (a, 0, sizeof (*a));
108  a->sep.is_ip4 = mp->is_ip4;
109  clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
110  a->sep.port = mp->port;
111  a->sep.transport_proto = mp->proto;
112  a->sep.peer.fib_index = mp->vrf;
113  clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip));
114  a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
115  a->sep_ext.parent_handle = mp->parent_handle;
116  if (mp->hostname_len)
117  {
118  vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
119  clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
120  }
121  a->api_context = mp->context;
122  a->app_index = app->app_index;
123  a->wrk_map_index = mp->wrk_index;
124 
125  if ((rv = vnet_connect (a)))
126  {
127  clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
128  app_wrk = application_get_worker (app, mp->wrk_index);
130  /* is_fail */ 1);
131  }
132 
133  vec_free (a->sep_ext.hostname);
134 }
135 
136 static void
138 {
140  vnet_connect_args_t _a, *a = &_a;
141  app_worker_t *app_wrk;
142  application_t *app;
143  int rv;
144 
146 
147  app = application_lookup (mp->client_index);
148  if (!app)
149  return;
150 
151  clib_memset (a, 0, sizeof (*a));
152  a->uri = (char *) mp->uri;
153  a->api_context = mp->context;
154  a->app_index = app->app_index;
155  if ((rv = vnet_connect_uri (a)))
156  {
157  clib_warning ("connect_uri returned: %d", rv);
158  app_wrk = application_get_worker (app, 0 /* default wrk only */ );
160  /* is_fail */ 1);
161  }
162 }
163 
164 static void
166 {
168  vnet_disconnect_args_t _a, *a = &_a;
169  application_t *app;
170 
171  app = application_lookup (mp->client_index);
172  if (!app)
173  return;
174 
175  a->app_index = app->app_index;
176  a->handle = mp->handle;
178 }
179 
180 static void
182 {
184  vnet_app_detach_args_t _a, *a = &_a;
185  application_t *app;
186 
188 
189  app = application_lookup (mp->client_index);
190  if (!app)
191  return;
192 
193  a->app_index = app->app_index;
194  a->api_client_index = mp->client_index;
196 }
197 
198 static void
200 {
202  vnet_unlisten_args_t _a, *a = &_a;
203  app_worker_t *app_wrk;
204  application_t *app;
205  int rv;
206 
208 
209  app = application_lookup (mp->client_index);
210  if (!app)
211  return;
212 
213  clib_memset (a, 0, sizeof (*a));
214  a->app_index = app->app_index;
215  a->handle = mp->handle;
216  a->wrk_map_index = mp->wrk_index;
217  if ((rv = vnet_unlisten (a)))
218  clib_warning ("unlisten returned: %d", rv);
219 
220  app_wrk = application_get_worker (app, a->wrk_map_index);
221  if (!app_wrk)
222  return;
223 
224  mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
225 }
226 
227 static void
229 {
231  vnet_disconnect_args_t _a = { 0 }, *a = &_a;
232  session_state_t old_state;
233  app_worker_t *app_wrk;
234  session_t *s;
235 
236  /* Server isn't interested, kill the session */
237  if (mp->retval)
238  {
239  a->app_index = mp->context;
240  a->handle = mp->handle;
242  return;
243  }
244 
245  /* Mail this back from the main thread. We're not polling in main
246  * thread so we're using other workers for notifications. */
247  if (vlib_num_workers () && vlib_get_thread_index () != 0
248  && session_thread_from_handle (mp->handle) == 0)
249  {
251  (u8 *) mp, sizeof (*mp));
252  return;
253  }
254 
256  if (!s)
257  return;
258 
259  app_wrk = app_worker_get (s->app_wrk_index);
260  if (app_wrk->app_index != mp->context)
261  {
262  clib_warning ("app doesn't own session");
263  return;
264  }
265 
266  if (!session_has_transport (s))
267  {
268  s->session_state = SESSION_STATE_READY;
270  return;
271  }
272  else
273  {
274  old_state = s->session_state;
275  s->session_state = SESSION_STATE_READY;
276 
279 
280  /* Closed while waiting for app to reply. Resend disconnect */
281  if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
282  {
283  app_worker_close_notify (app_wrk, s);
284  s->session_state = old_state;
285  return;
286  }
287  }
288 }
289 
290 static void
292 {
293  vnet_disconnect_args_t _a = { 0 }, *a = &_a;
295  app_worker_t *app_wrk;
296  session_t *s;
297  application_t *app;
298  u32 index, thread_index;
299 
300  mp = (session_reset_reply_msg_t *) data;
301  app = application_lookup (mp->context);
302  if (!app)
303  return;
304 
305  session_parse_handle (mp->handle, &index, &thread_index);
306  s = session_get_if_valid (index, thread_index);
307 
308  /* Session was already closed or already cleaned up */
309  if (!s || s->session_state != SESSION_STATE_TRANSPORT_CLOSING)
310  return;
311 
312  app_wrk = app_worker_get (s->app_wrk_index);
313  if (!app_wrk || app_wrk->app_index != app->app_index)
314  {
315  clib_warning ("App % does not own handle 0x%lx!", app->app_index,
316  mp->handle);
317  return;
318  }
319 
320  /* Client objected to resetting the session, log and continue */
321  if (mp->retval)
322  {
323  clib_warning ("client retval %d", mp->retval);
324  return;
325  }
326 
327  /* This comes as a response to a reset, transport only waiting for
328  * confirmation to remove connection state, no need to disconnect */
329  a->handle = mp->handle;
330  a->app_index = app->app_index;
332 }
333 
334 static void
336 {
338  vnet_disconnect_args_t _a, *a = &_a;
339  svm_msg_q_msg_t _msg, *msg = &_msg;
341  app_worker_t *app_wrk;
342  session_event_t *evt;
343  session_t *s;
344  application_t *app;
345  int rv = 0;
346 
347  mp = (session_disconnected_msg_t *) data;
348  if (!(s = session_get_from_handle_if_valid (mp->handle)))
349  {
350  clib_warning ("could not disconnect handle %llu", mp->handle);
351  return;
352  }
353  app_wrk = app_worker_get (s->app_wrk_index);
354  app = application_lookup (mp->client_index);
355  if (!(app_wrk && app && app->app_index == app_wrk->app_index))
356  {
357  clib_warning ("could not disconnect session: %llu app: %u",
358  mp->handle, mp->client_index);
359  return;
360  }
361 
362  a->handle = mp->handle;
363  a->app_index = app_wrk->wrk_index;
364  rv = vnet_disconnect_session (a);
365 
368  SVM_Q_WAIT, msg);
369  evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
370  clib_memset (evt, 0, sizeof (*evt));
371  evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
372  rmp = (session_disconnected_reply_msg_t *) evt->data;
373  rmp->handle = mp->handle;
374  rmp->context = mp->context;
375  rmp->retval = rv;
376  svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
377 }
378 
379 static void
381 {
383  vnet_disconnect_args_t _a, *a = &_a;
384  application_t *app;
385 
386  mp = (session_disconnected_reply_msg_t *) data;
387 
388  /* Client objected to disconnecting the session, log and continue */
389  if (mp->retval)
390  {
391  clib_warning ("client retval %d", mp->retval);
392  return;
393  }
394 
395  /* Disconnect has been confirmed. Confirm close to transport */
396  app = application_lookup (mp->context);
397  if (app)
398  {
399  a->handle = mp->handle;
400  a->app_index = app->app_index;
402  }
403 }
404 
405 static void
407 {
410  svm_msg_q_msg_t _msg, *msg = &_msg;
411  app_worker_t *app_wrk;
412  u32 owner_app_wrk_map;
413  session_event_t *evt;
414  session_t *s;
415  application_t *app;
416 
417  app = application_lookup (mp->client_index);
418  if (!app)
419  return;
420  if (!(s = session_get_from_handle_if_valid (mp->handle)))
421  {
422  clib_warning ("invalid handle %llu", mp->handle);
423  return;
424  }
425  app_wrk = app_worker_get (s->app_wrk_index);
426  if (app_wrk->app_index != app->app_index)
427  {
428  clib_warning ("app %u does not own session %llu", app->app_index,
429  mp->handle);
430  return;
431  }
432  owner_app_wrk_map = app_wrk->wrk_map_index;
433  app_wrk = application_get_worker (app, mp->wrk_index);
434 
435  /* This needs to come from the new owner */
436  if (mp->req_wrk_index == owner_app_wrk_map)
437  {
439 
442  SVM_Q_WAIT, msg);
443  evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
444  clib_memset (evt, 0, sizeof (*evt));
445  evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
446  wump = (session_req_worker_update_msg_t *) evt->data;
447  wump->session_handle = mp->handle;
448  svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
449  return;
450  }
451 
452  app_worker_own_session (app_wrk, s);
453 
454  /*
455  * Send reply
456  */
459  SVM_Q_WAIT, msg);
460  evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
461  clib_memset (evt, 0, sizeof (*evt));
462  evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
463  rmp = (session_worker_update_reply_msg_t *) evt->data;
464  rmp->handle = mp->handle;
465  rmp->rx_fifo = pointer_to_uword (s->rx_fifo);
466  rmp->tx_fifo = pointer_to_uword (s->tx_fifo);
468  svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
469 
470  /*
471  * Retransmit messages that may have been lost
472  */
473  if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
475 
476  if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
478 
479  if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
480  app_worker_close_notify (app_wrk, s);
481 }
482 
484 
485 typedef struct
486 {
490 
491 /* packet trace format function */
492 static u8 *
493 format_session_queue_trace (u8 * s, va_list * args)
494 {
495  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
496  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
497  session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
498 
499  s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
501  return s;
502 }
503 
504 #define foreach_session_queue_error \
505 _(TX, "Packets transmitted") \
506 _(TIMER, "Timer events") \
507 _(NO_BUFFER, "Out of buffers")
508 
509 typedef enum
510 {
511 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
513 #undef _
516 
517 static char *session_queue_error_strings[] = {
518 #define _(sym,string) string,
520 #undef _
521 };
522 
523 enum
524 {
528 };
529 
530 static void
532  u32 next_index, u32 * to_next, u16 n_segs,
533  session_t * s, u32 n_trace)
534 {
536  vlib_buffer_t *b;
537  int i;
538 
539  for (i = 0; i < clib_min (n_trace, n_segs); i++)
540  {
541  b = vlib_get_buffer (vm, to_next[i - n_segs]);
542  vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
543  t = vlib_add_trace (vm, node, b, sizeof (*t));
546  }
547  vlib_set_trace_count (vm, node, n_trace - i);
548 }
549 
550 always_inline void
552  vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
553 {
554  vlib_buffer_t *chain_b, *prev_b;
555  u32 chain_bi0, to_deq, left_from_seg;
556  session_worker_t *wrk;
557  u16 len_to_deq, n_bytes_read;
558  u8 *data, j;
559 
560  wrk = session_main_get_worker (ctx->s->thread_index);
561  b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
563 
564  chain_b = b;
565  left_from_seg = clib_min (ctx->snd_mss - b->current_length,
566  ctx->left_to_snd);
567  to_deq = left_from_seg;
568  for (j = 1; j < ctx->n_bufs_per_seg; j++)
569  {
570  prev_b = chain_b;
571  len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
572 
573  *n_bufs -= 1;
574  chain_bi0 = wrk->tx_buffers[*n_bufs];
575  chain_b = vlib_get_buffer (vm, chain_bi0);
576  chain_b->current_data = 0;
577  data = vlib_buffer_get_current (chain_b);
578  if (peek_data)
579  {
580  n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
581  ctx->tx_offset, len_to_deq, data);
582  ctx->tx_offset += n_bytes_read;
583  }
584  else
585  {
586  if (ctx->transport_vft->transport_options.tx_type ==
588  {
589  svm_fifo_t *f = ctx->s->tx_fifo;
590  session_dgram_hdr_t *hdr = &ctx->hdr;
591  u16 deq_now;
592  deq_now = clib_min (hdr->data_length - hdr->data_offset,
593  len_to_deq);
594  n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
595  data);
596  ASSERT (n_bytes_read > 0);
597 
598  hdr->data_offset += n_bytes_read;
599  if (hdr->data_offset == hdr->data_length)
600  {
602  svm_fifo_dequeue_drop (f, offset);
603  }
604  }
605  else
606  n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
607  len_to_deq, data);
608  }
609  ASSERT (n_bytes_read == len_to_deq);
610  chain_b->current_length = n_bytes_read;
612 
613  /* update previous buffer */
614  prev_b->next_buffer = chain_bi0;
615  prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
616 
617  /* update current buffer */
618  chain_b->next_buffer = 0;
619 
620  to_deq -= n_bytes_read;
621  if (to_deq == 0)
622  break;
623  }
624  ASSERT (to_deq == 0
625  && b->total_length_not_including_first_buffer == left_from_seg);
626  ctx->left_to_snd -= left_from_seg;
627 }
628 
629 always_inline void
631  vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
632 {
633  u32 len_to_deq;
634  u8 *data0;
635  int n_bytes_read;
636 
637  /*
638  * Start with the first buffer in chain
639  */
640  b->error = 0;
641  b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
642  b->current_data = 0;
643 
645  len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
646 
647  if (peek_data)
648  {
649  n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->tx_offset,
650  len_to_deq, data0);
651  ASSERT (n_bytes_read > 0);
652  /* Keep track of progress locally, transport is also supposed to
653  * increment it independently when pushing the header */
654  ctx->tx_offset += n_bytes_read;
655  }
656  else
657  {
658  if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
659  {
660  session_dgram_hdr_t *hdr = &ctx->hdr;
661  svm_fifo_t *f = ctx->s->tx_fifo;
662  u16 deq_now;
663  u32 offset;
664 
665  ASSERT (hdr->data_length > hdr->data_offset);
666  deq_now = clib_min (hdr->data_length - hdr->data_offset,
667  len_to_deq);
668  offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
669  n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
670  ASSERT (n_bytes_read > 0);
671 
672  if (ctx->s->session_state == SESSION_STATE_LISTENING)
673  {
674  ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
675  ctx->tc->rmt_port = hdr->rmt_port;
676  }
677  hdr->data_offset += n_bytes_read;
678  if (hdr->data_offset == hdr->data_length)
679  {
680  offset = hdr->data_length + SESSION_CONN_HDR_LEN;
681  svm_fifo_dequeue_drop (f, offset);
682  }
683  }
684  else
685  {
686  n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
687  len_to_deq, data0);
688  ASSERT (n_bytes_read > 0);
689  }
690  }
691  b->current_length = n_bytes_read;
692  ctx->left_to_snd -= n_bytes_read;
693 
694  /*
695  * Fill in the remaining buffers in the chain, if any
696  */
697  if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
698  session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
699 }
700 
703 {
704  if (peek_data)
705  {
706  if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
707  return 0;
708  /* Can retransmit for closed sessions but can't send new data if
709  * session is not ready or closed */
710  else if (s->session_state < SESSION_STATE_READY)
711  return 1;
712  else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
713  {
714  /* Allow closed transports to still send custom packets.
715  * For instance, tcp may want to send acks in time-wait. */
716  if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
717  && (s->flags & SESSION_F_CUSTOM_TX))
718  return 0;
719  return 2;
720  }
721  }
722  return 0;
723 }
724 
727 {
728  if (peek_data)
729  {
730  return ctx->transport_vft->get_connection (ctx->s->connection_index,
731  ctx->s->thread_index);
732  }
733  else
734  {
735  if (ctx->s->session_state == SESSION_STATE_LISTENING)
736  return ctx->transport_vft->get_listener (ctx->s->connection_index);
737  else
738  {
739  return ctx->transport_vft->get_connection (ctx->s->connection_index,
740  ctx->s->thread_index);
741  }
742  }
743 }
744 
745 always_inline void
747  u32 max_segs, u8 peek_data)
748 {
749  u32 n_bytes_per_buf, n_bytes_per_seg;
751  if (peek_data)
752  {
753  /* Offset in rx fifo from where to peek data */
754  ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
755  if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
756  {
757  ctx->max_len_to_snd = 0;
758  return;
759  }
760  ctx->max_dequeue -= ctx->tx_offset;
761  }
762  else
763  {
764  if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
765  {
766  if (ctx->max_dequeue <= sizeof (ctx->hdr))
767  {
768  ctx->max_len_to_snd = 0;
769  return;
770  }
771  svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
772  (u8 *) & ctx->hdr);
773  ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
774  ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
775  }
776  }
777  ASSERT (ctx->max_dequeue > 0);
778 
779  /* Ensure we're not writing more than transport window allows */
780  if (ctx->max_dequeue < ctx->snd_space)
781  {
782  /* Constrained by tx queue. Try to send only fully formed segments */
783  ctx->max_len_to_snd =
784  (ctx->max_dequeue > ctx->snd_mss) ?
785  ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
786  /* TODO Nagle ? */
787  }
788  else
789  {
790  /* Expectation is that snd_space0 is already a multiple of snd_mss */
791  ctx->max_len_to_snd = ctx->snd_space;
792  }
793 
794  /* Check if we're tx constrained by the node */
795  ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
796  if (ctx->n_segs_per_evt > max_segs)
797  {
798  ctx->n_segs_per_evt = max_segs;
799  ctx->max_len_to_snd = max_segs * ctx->snd_mss;
800  }
801 
802  n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
803  ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
804  n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->snd_mss;
805  ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
806  ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
807  ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
808  n_bytes_per_buf -
810 }
811 
812 always_inline int
814  vlib_node_runtime_t * node,
815  session_evt_elt_t * elt,
816  int *n_tx_packets, u8 peek_data)
817 {
818  u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
819  session_tx_context_t *ctx = &wrk->ctx;
821  session_event_t *e = &elt->evt;
822  vlib_main_t *vm = wrk->vm;
824  vlib_buffer_t *pb;
825  u16 n_bufs, rv;
826 
827  if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
828  {
829  if (rv < 2)
830  session_evt_add_old (wrk, elt);
831  return SESSION_TX_NO_DATA;
832  }
833 
834  next_index = smm->session_type_to_next[ctx->s->session_type];
835  max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
836 
837  tp = session_get_transport_proto (ctx->s);
839  ctx->tc = session_tx_get_transport (ctx, peek_data);
840 
841  if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
842  {
843  if (ctx->transport_vft->flush_data)
844  ctx->transport_vft->flush_data (ctx->tc);
845  e->event_type = SESSION_IO_EVT_TX;
846  }
847 
848  if (ctx->s->flags & SESSION_F_CUSTOM_TX)
849  {
850  u32 n_custom_tx;
851  ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
852  n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, max_burst);
853  *n_tx_packets += n_custom_tx;
854  if (PREDICT_FALSE
855  (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
856  return SESSION_TX_OK;
857  max_burst -= n_custom_tx;
858  if (!max_burst)
859  {
860  session_evt_add_old (wrk, elt);
861  return SESSION_TX_OK;
862  }
863  }
864 
865  ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
866  if (PREDICT_FALSE (ctx->snd_mss == 0))
867  {
868  session_evt_add_old (wrk, elt);
869  return SESSION_TX_NO_DATA;
870  }
871 
873 
874  /* This flow queue is "empty" so it should be re-evaluated before
875  * the ones that have data to send. */
876  if (ctx->snd_space == 0)
877  {
878  session_evt_add_head_old (wrk, elt);
879  return SESSION_TX_NO_DATA;
880  }
881 
882  /* Allow enqueuing of a new event */
884 
885  /* Check how much we can pull. */
886  session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
887 
888  if (PREDICT_FALSE (!ctx->max_len_to_snd))
889  {
891  return SESSION_TX_NO_DATA;
892  }
893 
894  n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
895  vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
897  n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
898  if (PREDICT_FALSE (n_bufs < n_bufs_needed))
899  {
900  if (n_bufs)
901  vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
902  if (svm_fifo_set_event (ctx->s->tx_fifo))
903  session_evt_add_head_old (wrk, elt);
905  SESSION_QUEUE_ERROR_NO_BUFFER, 1);
906  return SESSION_TX_NO_BUFFERS;
907  }
908 
909  ctx->left_to_snd = ctx->max_len_to_snd;
910  n_left = ctx->n_segs_per_evt;
911 
912  while (n_left >= 4)
913  {
914  vlib_buffer_t *b0, *b1;
915  u32 bi0, bi1;
916 
917  pbi = wrk->tx_buffers[n_bufs - 3];
918  pb = vlib_get_buffer (vm, pbi);
919  vlib_prefetch_buffer_header (pb, STORE);
920  pbi = wrk->tx_buffers[n_bufs - 4];
921  pb = vlib_get_buffer (vm, pbi);
922  vlib_prefetch_buffer_header (pb, STORE);
923 
924  bi0 = wrk->tx_buffers[--n_bufs];
925  bi1 = wrk->tx_buffers[--n_bufs];
926 
927  b0 = vlib_get_buffer (vm, bi0);
928  b1 = vlib_get_buffer (vm, bi1);
929 
930  session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
931  session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
932 
933  ctx->transport_vft->push_header (ctx->tc, b0);
934  ctx->transport_vft->push_header (ctx->tc, b1);
935 
936  n_left -= 2;
937 
940 
941  vec_add1 (wrk->pending_tx_buffers, bi0);
942  vec_add1 (wrk->pending_tx_buffers, bi1);
943  vec_add1 (wrk->pending_tx_nexts, next_index);
944  vec_add1 (wrk->pending_tx_nexts, next_index);
945  }
946  while (n_left)
947  {
948  vlib_buffer_t *b0;
949  u32 bi0;
950 
951  if (n_left > 1)
952  {
953  pbi = wrk->tx_buffers[n_bufs - 2];
954  pb = vlib_get_buffer (vm, pbi);
955  vlib_prefetch_buffer_header (pb, STORE);
956  }
957 
958  bi0 = wrk->tx_buffers[--n_bufs];
959  b0 = vlib_get_buffer (vm, bi0);
960  session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
961 
962  /* Ask transport to push header after current_length and
963  * total_length_not_including_first_buffer are updated */
964  ctx->transport_vft->push_header (ctx->tc, b0);
965 
966  n_left -= 1;
967 
969 
970  vec_add1 (wrk->pending_tx_buffers, bi0);
971  vec_add1 (wrk->pending_tx_nexts, next_index);
972  }
973 
974  if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
975  session_tx_trace_frame (vm, node, next_index, wrk->pending_tx_buffers,
976  ctx->n_segs_per_evt, ctx->s, n_trace);
977 
978  if (PREDICT_FALSE (n_bufs))
979  vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
980 
981  *n_tx_packets += ctx->n_segs_per_evt;
983 
984  SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
985  ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
986 
987  /* If we couldn't dequeue all bytes mark as partially read */
988  ASSERT (ctx->left_to_snd == 0);
989  if (ctx->max_len_to_snd < ctx->max_dequeue)
990  if (svm_fifo_set_event (ctx->s->tx_fifo))
991  session_evt_add_old (wrk, elt);
992 
993  if (!peek_data
994  && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
995  {
996  /* Fix dgram pre header */
997  if (ctx->max_len_to_snd < ctx->max_dequeue)
998  svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
999  sizeof (session_dgram_pre_hdr_t));
1000  /* More data needs to be read */
1001  else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
1002  if (svm_fifo_set_event (ctx->s->tx_fifo))
1003  session_evt_add_old (wrk, elt);
1004 
1005  if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1006  session_dequeue_notify (ctx->s);
1007  }
1008  return SESSION_TX_OK;
1009 }
1010 
1011 int
1013  vlib_node_runtime_t * node,
1014  session_evt_elt_t * e, int *n_tx_packets)
1015 {
1016  return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1017 }
1018 
1019 int
1021  vlib_node_runtime_t * node,
1022  session_evt_elt_t * e, int *n_tx_packets)
1023 {
1024  return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1025 }
1026 
1027 int
1029  vlib_node_runtime_t * node,
1030  session_evt_elt_t * e, int *n_tx_packets)
1031 {
1032  session_t *s = wrk->ctx.s;
1033 
1034  if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1035  return 0;
1038  VLIB_FRAME_SIZE - *n_tx_packets);
1039 }
1040 
1042 session_event_get_session (session_event_t * e, u8 thread_index)
1043 {
1044  return session_get_if_valid (e->session_index, thread_index);
1045 }
1046 
1047 always_inline void
1049 {
1050  clib_llist_index_t ei;
1051  void (*fp) (void *);
1052  session_event_t *e;
1053  session_t *s;
1054 
1055  ei = clib_llist_entry_index (wrk->event_elts, elt);
1056  e = &elt->evt;
1057 
1058  switch (e->event_type)
1059  {
1060  case SESSION_CTRL_EVT_RPC:
1061  fp = e->rpc_args.fp;
1062  (*fp) (e->rpc_args.arg);
1063  break;
1065  s = session_get_from_handle_if_valid (e->session_handle);
1066  if (PREDICT_FALSE (!s))
1067  break;
1069  break;
1071  s = session_get_from_handle_if_valid (e->session_handle);
1072  if (PREDICT_FALSE (!s))
1073  break;
1075  break;
1078  break;
1081  break;
1084  break;
1087  break;
1090  break;
1093  break;
1096  break;
1099  break;
1102  elt));
1103  break;
1106  break;
1109  break;
1112  break;
1113  default:
1114  clib_warning ("unhandled event type %d", e->event_type);
1115  }
1116 
1117  /* Regrab elements in case pool moved */
1118  elt = pool_elt_at_index (wrk->event_elts, ei);
1119  if (!clib_llist_elt_is_linked (elt, evt_list))
1120  {
1121  e = &elt->evt;
1122  if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1123  session_evt_ctrl_data_free (wrk, elt);
1124  session_evt_elt_free (wrk, elt);
1125  }
1126 }
1127 
1128 always_inline void
1130  session_evt_elt_t * elt, u32 thread_index,
1131  int *n_tx_packets)
1132 {
1133  session_main_t *smm = &session_main;
1134  app_worker_t *app_wrk;
1135  clib_llist_index_t ei;
1136  session_event_t *e;
1137  session_t *s;
1138 
1139  ei = clib_llist_entry_index (wrk->event_elts, elt);
1140  e = &elt->evt;
1141 
1142  switch (e->event_type)
1143  {
1145  case SESSION_IO_EVT_TX:
1146  s = session_event_get_session (e, thread_index);
1147  if (PREDICT_FALSE (!s))
1148  {
1149  clib_warning ("session %u was freed!", e->session_index);
1150  break;
1151  }
1153  wrk->ctx.s = s;
1154  /* Spray packets in per session type frames, since they go to
1155  * different nodes */
1156  (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1157  break;
1158  case SESSION_IO_EVT_RX:
1159  s = session_event_get_session (e, thread_index);
1160  if (!s)
1161  break;
1164  break;
1166  s = session_event_get_session (e, thread_index);
1167  if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1168  break;
1170  app_wrk = app_worker_get (s->app_wrk_index);
1171  app_worker_builtin_rx (app_wrk, s);
1172  break;
1174  s = session_get_from_handle_if_valid (e->session_handle);
1175  wrk->ctx.s = s;
1176  if (PREDICT_TRUE (s != 0))
1177  session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1178  break;
1179  default:
1180  clib_warning ("unhandled event type %d", e->event_type);
1181  }
1182 
1183  /* Regrab elements in case pool moved */
1184  elt = pool_elt_at_index (wrk->event_elts, ei);
1185  if (!clib_llist_elt_is_linked (elt, evt_list))
1186  session_evt_elt_free (wrk, elt);
1187 }
1188 
1189 /* *INDENT-OFF* */
1190 static const u32 session_evt_msg_sizes[] = {
1191 #define _(symc, sym) \
1192  [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1194 #undef _
1195 };
1196 /* *INDENT-ON* */
1197 
1198 always_inline void
1199 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1200 {
1201  session_evt_elt_t *elt;
1202 
1203  if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1204  {
1205  elt = session_evt_alloc_ctrl (wrk);
1206  if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1207  {
1208  elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1209  elt->evt.event_type = evt->event_type;
1210  clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1211  session_evt_msg_sizes[evt->event_type]);
1212  }
1213  else
1214  {
1215  /* Internal control events fit into io events footprint */
1216  clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1217  }
1218  }
1219  else
1220  {
1221  elt = session_evt_alloc_new (wrk);
1222  clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1223  }
1224 }
1225 
1226 static void
1228  vlib_node_runtime_t * node)
1229 {
1231  wrk->pending_tx_nexts,
1232  vec_len (wrk->pending_tx_nexts));
1235 }
1236 
1237 static uword
1239  vlib_frame_t * frame)
1240 {
1242  u32 thread_index = vm->thread_index, n_to_dequeue;
1243  session_worker_t *wrk = &smm->wrk[thread_index];
1244  session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1245  svm_msg_q_msg_t _msg, *msg = &_msg;
1246  clib_llist_index_t old_ti;
1247  int i, n_tx_packets = 0;
1248  session_event_t *evt;
1249  svm_msg_q_t *mq;
1250 
1251  SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1252 
1253  wrk->last_vlib_time = vlib_time_now (vm);
1255 
1256  /*
1257  * Update transport time
1258  */
1259  transport_update_time (wrk->last_vlib_time, thread_index);
1260 
1261  /*
1262  * Dequeue and handle new events
1263  */
1264 
1265  /* Try to dequeue what is available. Don't wait for lock.
1266  * XXX: we may need priorities here */
1267  mq = wrk->vpp_event_queue;
1268  n_to_dequeue = svm_msg_q_size (mq);
1269  if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
1270  {
1271  for (i = 0; i < n_to_dequeue; i++)
1272  {
1273  svm_msg_q_sub_w_lock (mq, msg);
1274  evt = svm_msg_q_msg_data (mq, msg);
1275  session_evt_add_to_list (wrk, evt);
1276  svm_msg_q_free_msg (mq, msg);
1277  }
1278  svm_msg_q_unlock (mq);
1279  }
1280 
1281  /*
1282  * Handle control events
1283  */
1284 
1285  ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
1286 
1287  /* *INDENT-OFF* */
1288  clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
1289  clib_llist_remove (wrk->event_elts, evt_list, elt);
1290  session_event_dispatch_ctrl (wrk, elt);
1291  }));
1292  /* *INDENT-ON* */
1293 
1294  /*
1295  * Handle the new io events.
1296  */
1297 
1298  new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
1299  old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1300  old_ti = clib_llist_prev_index (old_he, evt_list);
1301 
1302  /* *INDENT-OFF* */
1303  clib_llist_foreach_safe (wrk->event_elts, evt_list, new_he, elt, ({
1304  session_evt_type_t et;
1305 
1306  et = elt->evt.event_type;
1307  clib_llist_remove (wrk->event_elts, evt_list, elt);
1308 
1309  /* Postpone tx events if we can't handle them this dispatch cycle */
1310  if (n_tx_packets >= VLIB_FRAME_SIZE
1311  && (et == SESSION_IO_EVT_TX || et == SESSION_IO_EVT_TX_FLUSH))
1312  {
1313  clib_llist_add (wrk->event_elts, evt_list, elt, new_he);
1314  continue;
1315  }
1316 
1317  session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1318  }));
1319  /* *INDENT-ON* */
1320 
1321  /*
1322  * Handle the old io events, if we had any prior to processing the new ones
1323  */
1324 
1325  if (old_ti != wrk->old_head)
1326  {
1327  clib_llist_index_t ei, next_ei;
1328 
1329  old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1330  ei = clib_llist_next_index (old_he, evt_list);
1331 
1332  while (n_tx_packets < VLIB_FRAME_SIZE)
1333  {
1334  elt = pool_elt_at_index (wrk->event_elts, ei);
1335  next_ei = clib_llist_next_index (elt, evt_list);
1336  clib_llist_remove (wrk->event_elts, evt_list, elt);
1337 
1338  session_event_dispatch_io (wrk, node, elt, thread_index,
1339  &n_tx_packets);
1340 
1341  if (ei == old_ti)
1342  break;
1343 
1344  ei = next_ei;
1345  };
1346  }
1347 
1348  if (vec_len (wrk->pending_tx_buffers))
1350 
1352  SESSION_QUEUE_ERROR_TX, n_tx_packets);
1353 
1354  SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1355 
1356  return n_tx_packets;
1357 }
1358 
1359 /* *INDENT-OFF* */
1361 {
1362  .function = session_queue_node_fn,
1364  .name = "session-queue",
1365  .format_trace = format_session_queue_trace,
1366  .type = VLIB_NODE_TYPE_INPUT,
1367  .n_errors = ARRAY_LEN (session_queue_error_strings),
1368  .error_strings = session_queue_error_strings,
1369  .state = VLIB_NODE_STATE_DISABLED,
1370 };
1371 /* *INDENT-ON* */
1372 
1373 void
1375 {
1378  u32 my_thread_index = vm->thread_index;
1379  session_event_t _e, *e = &_e;
1380  svm_msg_q_ring_t *ring;
1381  session_t *s0;
1382  svm_msg_q_msg_t *msg;
1383  svm_msg_q_t *mq;
1384  int i, index;
1385 
1386  mq = smm->wrk[my_thread_index].vpp_event_queue;
1387  index = mq->q->head;
1388 
1389  for (i = 0; i < mq->q->cursize; i++)
1390  {
1391  msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1392  ring = svm_msg_q_ring (mq, msg->ring_index);
1393  clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1394 
1395  switch (e->event_type)
1396  {
1397  case SESSION_IO_EVT_TX:
1398  s0 = session_event_get_session (e, my_thread_index);
1399  fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
1400  break;
1401 
1403  s0 = session_get_from_handle (e->session_handle);
1404  fformat (stdout, "[%04d] disconnect session %d\n", i,
1405  s0->session_index);
1406  break;
1407 
1409  s0 = session_event_get_session (e, my_thread_index);
1410  fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
1411  break;
1412 
1413  case SESSION_CTRL_EVT_RPC:
1414  fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1415  i, (u64) (uword) (e->rpc_args.fp),
1416  (u64) (uword) (e->rpc_args.arg));
1417  break;
1418 
1419  default:
1420  fformat (stdout, "[%04d] unhandled event type %d\n",
1421  i, e->event_type);
1422  break;
1423  }
1424 
1425  index++;
1426 
1427  if (index == mq->q->maxsize)
1428  index = 0;
1429  }
1430 }
1431 
1432 static u8
1433 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1434 {
1435  session_t *s;
1436  switch (e->event_type)
1437  {
1438  case SESSION_IO_EVT_RX:
1439  case SESSION_IO_EVT_TX:
1443  if (e->session_index == f->master_session_index)
1444  return 1;
1445  break;
1447  break;
1448  case SESSION_CTRL_EVT_RPC:
1449  s = session_get_from_handle (e->session_handle);
1450  if (!s)
1451  {
1452  clib_warning ("session has event but doesn't exist!");
1453  break;
1454  }
1455  if (s->rx_fifo == f || s->tx_fifo == f)
1456  return 1;
1457  break;
1458  default:
1459  break;
1460  }
1461  return 0;
1462 }
1463 
1464 u8
1465 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1466 {
1467  session_evt_elt_t *elt;
1468  session_worker_t *wrk;
1469  int i, index, found = 0;
1470  svm_msg_q_msg_t *msg;
1471  svm_msg_q_ring_t *ring;
1472  svm_msg_q_t *mq;
1473  u8 thread_index;
1474 
1475  ASSERT (e);
1476  thread_index = f->master_thread_index;
1477  wrk = session_main_get_worker (thread_index);
1478 
1479  /*
1480  * Search evt queue
1481  */
1482  mq = wrk->vpp_event_queue;
1483  index = mq->q->head;
1484  for (i = 0; i < mq->q->cursize; i++)
1485  {
1486  msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1487  ring = svm_msg_q_ring (mq, msg->ring_index);
1488  clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1489  found = session_node_cmp_event (e, f);
1490  if (found)
1491  return 1;
1492  index = (index + 1) % mq->q->maxsize;
1493  }
1494  /*
1495  * Search pending events vector
1496  */
1497 
1498  /* *INDENT-OFF* */
1499  clib_llist_foreach (wrk->event_elts, evt_list,
1500  pool_elt_at_index (wrk->event_elts, wrk->new_head),
1501  elt, ({
1502  found = session_node_cmp_event (&elt->evt, f);
1503  if (found)
1504  {
1505  clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1506  goto done;
1507  }
1508  }));
1509  /* *INDENT-ON* */
1510 
1511  /* *INDENT-OFF* */
1512  clib_llist_foreach (wrk->event_elts, evt_list,
1513  pool_elt_at_index (wrk->event_elts, wrk->old_head),
1514  elt, ({
1515  found = session_node_cmp_event (&elt->evt, f);
1516  if (found)
1517  {
1518  clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1519  goto done;
1520  }
1521  }));
1522  /* *INDENT-ON* */
1523 
1524 done:
1525  return found;
1526 }
1527 
1528 static clib_error_t *
1530 {
1531  if (vec_len (vlib_mains) < 2)
1532  return 0;
1533 
1534  /*
1535  * Shut off (especially) worker-thread session nodes.
1536  * Otherwise, vpp can crash as the main thread unmaps the
1537  * API segment.
1538  */
1540  session_node_enable_disable (0 /* is_enable */ );
1542  return 0;
1543 }
1544 
1546 
1547 static uword
1549  vlib_frame_t * f)
1550 {
1551  f64 now, timeout = 1.0;
1552  uword *event_data = 0;
1553  uword event_type;
1554 
1555  while (1)
1556  {
1558  now = vlib_time_now (vm);
1559  event_type = vlib_process_get_events (vm, (uword **) & event_data);
1560 
1561  switch (event_type)
1562  {
1564  /* Flush the frames by updating all transports times */
1565  transport_update_time (now, 0);
1566  break;
1568  timeout = 100000.0;
1569  break;
1570  case ~0:
1571  /* Timed out. Update time for all transports to trigger all
1572  * outstanding retransmits. */
1573  transport_update_time (now, 0);
1574  break;
1575  }
1576  vec_reset_length (event_data);
1577  }
1578  return 0;
1579 }
1580 
1581 /* *INDENT-OFF* */
1583 {
1584  .function = session_queue_process,
1585  .type = VLIB_NODE_TYPE_PROCESS,
1586  .name = "session-queue-process",
1587  .state = VLIB_NODE_STATE_DISABLED,
1588 };
1589 /* *INDENT-ON* */
1590 
1593  vlib_frame_t * frame)
1594 {
1596  if (!sm->wrk[0].vpp_event_queue)
1597  return 0;
1598  return session_queue_node_fn (vm, node, frame);
1599 }
1600 
1601 /* *INDENT-OFF* */
1603 {
1604  .function = session_queue_pre_input_inline,
1605  .type = VLIB_NODE_TYPE_PRE_INPUT,
1606  .name = "session-queue-main",
1607  .state = VLIB_NODE_STATE_DISABLED,
1608 };
1609 /* *INDENT-ON* */
1610 
1611 /*
1612  * fd.io coding-style-patch-verification: ON
1613  *
1614  * Local Variables:
1615  * eval: (c-set-style "gnu")
1616  * End:
1617  */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:439
static void session_tx_trace_frame(vlib_main_t *vm, vlib_node_runtime_t *node, u32 next_index, u32 *to_next, u16 n_segs, session_t *s, u32 n_trace)
Definition: session_node.c:531
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:124
int app_worker_lock_and_send_event(app_worker_t *app, session_t *s, u8 evt_type)
Send event to application.
u32 connection_index
Index of the transport connection associated to the session.
#define ENDPOINT_INVALID_INDEX
vlib_main_t vlib_global_main
Definition: main.c:1940
void session_transport_reset(session_t *s)
Force transport close.
Definition: session.c:1283
void * svm_msg_q_msg_data(svm_msg_q_t *mq, svm_msg_q_msg_t *msg)
Get data for message in queue.
#define clib_min(x, y)
Definition: clib.h:295
#define CLIB_UNUSED(x)
Definition: clib.h:82
static void app_mq_detach_handler(void *data)
Definition: session_node.c:181
session_type_t session_type
Type built from transport and network protocol types.
static void session_mq_unlisten_handler(void *data)
Definition: session_node.c:199
void ip_copy(ip46_address_t *dst, ip46_address_t *src, u8 is_ip4)
Definition: ip.c:81
#define SESSION_Q_PROCESS_FLUSH_FRAMES
Definition: session.h:203
static u32 vlib_get_trace_count(vlib_main_t *vm, vlib_node_runtime_t *rt)
Definition: trace_funcs.h:187
svm_msg_q_t * vpp_event_queue
vpp event message queue for worker
Definition: session.h:84
static f64 vlib_process_wait_for_event_or_clock(vlib_main_t *vm, f64 dt)
Suspend a cooperative multi-tasking thread Waits for an event, or for the indicated number of seconds...
Definition: node_funcs.h:673
vlib_node_registration_t session_queue_pre_input_node
(constructor) VLIB_REGISTER_NODE (session_queue_pre_input_node)
a
Definition: bitmap.h:538
static void vlib_buffer_free(vlib_main_t *vm, u32 *buffers, u32 n_buffers)
Free buffers Frees the entire buffer chain for each buffer.
Definition: buffer_funcs.h:865
svm_fifo_t * tx_fifo
session_main_t session_main
Definition: session.c:26
struct _vnet_connect_args vnet_connect_args_t
struct _vnet_unlisten_args_t vnet_unlisten_args_t
#define clib_llist_next_index(E, name)
Definition: llist.h:69
#define PREDICT_TRUE(x)
Definition: clib.h:112
u32 session_index
Index in thread pool where session was allocated.
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:110
unsigned long u64
Definition: types.h:89
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
static int svm_fifo_is_empty_prod(svm_fifo_t *f)
Check if fifo is empty optimized for producer.
Definition: svm_fifo.h:577
session_t * s
Definition: session.h:48
static void session_event_dispatch_ctrl(session_worker_t *wrk, session_evt_elt_t *elt)
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
#define VLIB_NODE_FLAG_TRACE_SUPPORTED
Definition: node.h:306
static f64 vlib_time_now(vlib_main_t *vm)
Definition: main.h:279
static void session_mq_listen_uri_handler(void *data)
Definition: session_node.c:69
svm_fifo_t * rx_fifo
Pointers to rx/tx buffers.
session_worker_t * wrk
Worker contexts.
Definition: session.h:147
static session_t * session_get_if_valid(u64 si, u32 thread_index)
Definition: session.h:300
u32 thread_index
Definition: main.h:218
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:113
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:522
static transport_proto_t session_get_transport_proto(session_t *s)
application_t * application_lookup(u32 api_client_index)
Definition: application.c:386
int svm_fifo_peek(svm_fifo_t *f, u32 offset, u32 len, u8 *dst)
Peek data from fifo.
Definition: svm_fifo.c:1007
u32 wrk_map_index
Worker index in app&#39;s map pool.
Definition: application.h:40
int i
static clib_error_t * session_queue_exit(vlib_main_t *vm)
static uword session_queue_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
int vnet_unlisten(vnet_unlisten_args_t *a)
Definition: application.c:1039
session_evt_elt_t * event_elts
Pool of session event list elements.
Definition: session.h:105
u8 data[128]
Definition: ipsec.api:251
static void * session_evt_ctrl_data(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:254
void svm_fifo_overwrite_head(svm_fifo_t *f, u8 *src, u32 len)
Overwrite fifo head with new data.
Definition: svm_fifo.c:866
#define vec_validate_aligned(V, I, A)
Make sure vector is long enough for given index (no header, specified alignment)
Definition: vec.h:450
int session_tx_fifo_dequeue_and_snd(session_worker_t *wrk, vlib_node_runtime_t *node, session_evt_elt_t *e, int *n_tx_packets)
u32 flags
Session flags.
void session_node_enable_disable(u8 is_en)
Definition: session.c:1570
vlib_main_t ** vlib_mains
Definition: buffer.c:332
static void session_parse_handle(session_handle_t handle, u32 *index, u32 *thread_index)
#define clib_llist_foreach(LP, name, H, E, body)
Walk list starting at head.
Definition: llist.h:255
unsigned char u8
Definition: types.h:56
app_worker_t * application_get_worker(application_t *app, u32 wrk_map_index)
Definition: application.c:644
u16 * pending_tx_nexts
Vector of nexts for the pending tx buffers.
Definition: session.h:126
static void session_tx_fill_buffer(vlib_main_t *vm, session_tx_context_t *ctx, vlib_buffer_t *b, u16 *n_bufs, u8 peek_data)
Definition: session_node.c:630
static u32 session_evt_ctrl_data_alloc(session_worker_t *wrk)
Definition: session.h:236
struct _vnet_bind_args_t vnet_listen_args_t
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
double f64
Definition: types.h:142
#define vlib_worker_thread_barrier_sync(X)
Definition: threads.h:204
void transport_update_time(clib_time_type_t time_now, u8 thread_index)
Definition: transport.c:708
struct _svm_fifo svm_fifo_t
static void vlib_trace_buffer(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, vlib_buffer_t *b, int follow_chain)
Definition: trace_funcs.h:130
static void session_mq_disconnect_handler(void *data)
Definition: session_node.c:165
u32 * tx_buffers
Vector of tx buffer free lists.
Definition: session.h:102
int svm_msg_q_lock_and_alloc_msg_w_ring(svm_msg_q_t *mq, u32 ring_index, u8 noblock, svm_msg_q_msg_t *msg)
Lock message queue and allocate message buffer on ring.
static int svm_fifo_is_empty(svm_fifo_t *f)
Check if fifo is empty.
Definition: svm_fifo.h:590
static session_worker_t * session_main_get_worker(u32 thread_index)
Definition: session.h:591
void dump_thread_0_event_queue(void)
#define static_always_inline
Definition: clib.h:99
vlib_main_t * vm
Convenience pointer to this worker&#39;s vlib_main.
Definition: session.h:93
static uword vlib_process_get_events(vlib_main_t *vm, uword **data_vector)
Return the first event type which has occurred and a vector of per-event data of that type...
Definition: node_funcs.h:516
struct _vnet_disconnect_args_t vnet_disconnect_args_t
u8 session_node_lookup_fifo_event(svm_fifo_t *f, session_event_t *e)
static void session_mq_connect_uri_handler(void *data)
Definition: session_node.c:137
#define always_inline
Definition: clib.h:98
clib_llist_index_t new_head
Head of list of elements.
Definition: session.h:114
static u32 svm_fifo_max_dequeue_cons(svm_fifo_t *f)
Fifo max bytes to dequeue optimized for consumer.
Definition: svm_fifo.h:498
u32 * session_type_to_next
Per session type output nodes.
Definition: session.h:161
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
unsigned int u32
Definition: types.h:88
int svm_fifo_dequeue(svm_fifo_t *f, u32 len, u8 *dst)
Dequeue data from fifo.
Definition: svm_fifo.c:981
int session_send_io_evt_to_thread(svm_fifo_t *f, session_evt_type_t evt_type)
Definition: session.c:79
#define VLIB_FRAME_SIZE
Definition: node.h:378
session_state_t
static char * session_queue_error_strings[]
Definition: session_node.c:517
int session_dequeue_notify(session_t *s)
Definition: session.c:628
transport_proto_vft_t * transport_protocol_get_vft(transport_proto_t transport_proto)
Get transport virtual function table.
Definition: transport.c:228
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:136
#define TRANSPORT_MAX_HDRS_LEN
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
#define CLIB_US_TIME_FREQ
Definition: time.h:207
session_event_t evt
Definition: session.h:68
static void * vlib_buffer_make_headroom(vlib_buffer_t *b, u8 size)
Make head room, typically for packet headers.
Definition: buffer.h:350
static session_t * session_get_from_handle(session_handle_t handle)
Definition: session.h:313
session_queue_error_t
Definition: session_node.c:509
transport_proto_vft_t * transport_vft
Definition: session.h:49
long ctx[MAX_CONNS]
Definition: main.c:144
unsigned short u16
Definition: types.h:57
static void session_evt_ctrl_data_free(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:261
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
static uword session_queue_process(vlib_main_t *vm, vlib_node_runtime_t *rt, vlib_frame_t *f)
int mq_send_session_bound_cb(u32 app_wrk_index, u32 api_context, session_handle_t handle, int rv)
Definition: session_api.c:383
int session_tx_fifo_peek_and_snd(session_worker_t *wrk, vlib_node_runtime_t *node, session_evt_elt_t *e, int *n_tx_packets)
#define PREDICT_FALSE(x)
Definition: clib.h:111
static u8 session_node_cmp_event(session_event_t *e, svm_fifo_t *f)
svm_msg_q_ring_t * svm_msg_q_ring(svm_msg_q_t *mq, u32 ring_index)
Get message queue ring.
Definition: message_queue.c:27
static void svm_fifo_unset_event(svm_fifo_t *f)
Unset fifo event flag.
Definition: svm_fifo.h:761
u32 wrk_index
Worker index in global worker pool.
Definition: application.h:37
u32 node_index
Node index.
Definition: node.h:496
static u8 * format_vnet_api_errno(u8 *s, va_list *args)
Definition: api_errno.h:164
session_fifo_rx_fn ** session_tx_fns
Per transport rx function that can either dequeue or peek.
Definition: session.h:156
u64 session_segment_handle(session_t *s)
Definition: session.c:1401
word fformat(FILE *f, char *fmt,...)
Definition: format.c:462
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1150
static session_t * session_get_from_handle_if_valid(session_handle_t handle)
Definition: session.h:322
static_always_inline u32 vlib_buffer_get_default_data_size(vlib_main_t *vm)
Definition: buffer_funcs.h:96
static u8 svm_fifo_set_event(svm_fifo_t *f)
Set fifo event flag.
Definition: svm_fifo.h:748
#define foreach_session_ctrl_evt
The fine-grained event logger allows lightweight, thread-safe event logging at minimum cost...
int mq_send_session_connected_cb(u32 app_wrk_index, u32 api_context, session_t *s, u8 is_fail)
Definition: session_api.c:303
static void session_evt_elt_free(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:215
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
static u8 svm_fifo_needs_deq_ntf(svm_fifo_t *f, u32 n_last_deq)
Check if fifo needs dequeue notification.
Definition: svm_fifo.h:839
static void session_tx_fifo_chain_tail(vlib_main_t *vm, session_tx_context_t *ctx, vlib_buffer_t *b, u16 *n_bufs, u8 peek_data)
Definition: session_node.c:551
static void session_evt_add_to_list(session_worker_t *wrk, session_event_t *evt)
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:213
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
vlib_main_t * vm
Definition: buffer.c:323
static void svm_msg_q_unlock(svm_msg_q_t *mq)
Unlock message queue.
static void session_event_dispatch_io(session_worker_t *wrk, vlib_node_runtime_t *node, session_evt_elt_t *elt, u32 thread_index, int *n_tx_packets)
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
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
#define SESSION_CONN_HDR_LEN
int app_worker_builtin_rx(app_worker_t *app_wrk, session_t *s)
#define VLIB_MAIN_LOOP_EXIT_FUNCTION(x)
Definition: init.h:178
#define clib_warning(format, args...)
Definition: error.h:59
svm_queue_t * q
queue for exchanging messages
Definition: message_queue.h:39
struct _transport_connection transport_connection_t
static session_evt_elt_t * session_evt_alloc_new(session_worker_t *wrk)
Definition: session.h:268
static_always_inline uword session_queue_pre_input_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
#define ARRAY_LEN(x)
Definition: clib.h:62
blocking call - best used in combination with condvars, for eventfds we don&#39;t yield the cpu ...
Definition: queue.h:42
u32 * pending_tx_buffers
Vector of buffers to be sent.
Definition: session.h:123
static int svm_msg_q_try_lock(svm_msg_q_t *mq)
Try locking message queue.
static u32 session_thread_from_handle(session_handle_t handle)
#define SESSION_Q_PROCESS_STOP
Definition: session.h:204
u32 ring_index
ring index, could be u8
Definition: message_queue.h:62
#define foreach_session_queue_error
Definition: session_node.c:504
#define ASSERT(truth)
static void session_mq_disconnected_reply_handler(void *data)
Definition: session_node.c:380
void svm_msg_q_add_and_unlock(svm_msg_q_t *mq, svm_msg_q_msg_t *msg)
Producer enqueue one message to queue with mutex held.
static session_t * session_event_get_session(session_event_t *e, u8 thread_index)
static int transport_custom_tx(transport_proto_t tp, void *s, u32 max_burst_size)
Definition: transport.h:136
int ct_session_connect_notify(session_t *ss)
datagram mode
session_tx_context_t ctx
Context for session tx.
Definition: session.h:99
void transport_connection_update_tx_bytes(transport_connection_t *tc, u32 bytes)
Update tx bytes for paced transport connection.
Definition: transport.c:694
int vnet_listen(vnet_listen_args_t *a)
Definition: application.c:947
int vnet_application_detach(vnet_app_detach_args_t *a)
Detach application from vpp.
Definition: application.c:869
u32 clib_llist_index_t
Definition: llist.h:27
enum _transport_proto transport_proto_t
#define clib_llist_elt_is_linked(E, name)
Check if element is linked in a list.
Definition: llist.h:129
clib_time_type_t last_vlib_time
vlib_time_now last time around the track
Definition: session.h:87
ip46_address_t rmt_ip
struct _vnet_app_detach_args_t vnet_app_detach_args_t
static uword pointer_to_uword(const void *p)
Definition: types.h:131
int vnet_connect(vnet_connect_args_t *a)
Definition: application.c:1001
static u8 * format_session_queue_trace(u8 *s, va_list *args)
Definition: session_node.c:493
static int transport_app_rx_evt(transport_proto_t tp, u32 conn_index, u32 thread_index)
Definition: transport.h:142
session_dgram_hdr_t hdr
Definition: session.h:62
u8 thread_index
Index of the thread that allocated the session.
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
static void session_tx_set_dequeue_params(vlib_main_t *vm, session_tx_context_t *ctx, u32 max_segs, u8 peek_data)
Definition: session_node.c:746
u32 app_index
App index in app pool.
Definition: application.h:89
struct _vlib_node_registration vlib_node_registration_t
template key/value backing page structure
Definition: bihash_doc.h:44
app_worker_t * app_worker_get(u32 wrk_index)
void svm_msg_q_free_msg(svm_msg_q_t *mq, svm_msg_q_msg_t *msg)
Free message buffer.
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
void vlib_rpc_call_main_thread(void *callback, u8 *args, u32 arg_size)
Definition: threads.c:1826
static u8 session_tx_not_ready(session_t *s, u8 peek_data)
Definition: session_node.c:702
clib_llist_index_t old_head
Head of list of pending events.
Definition: session.h:117
u32 next_buffer
Next buffer for this linked-list of buffers.
Definition: buffer.h:140
volatile u8 session_state
State in session layer state machine.
#define VLIB_BUFFER_TRACE_TRAJECTORY_INIT(b)
Definition: buffer.h:489
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
int vnet_bind_uri(vnet_listen_args_t *a)
static const u32 session_evt_msg_sizes[]
static void session_mq_worker_update_handler(void *data)
Definition: session_node.c:406
static void session_evt_add_old(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:221
int vnet_disconnect_session(vnet_disconnect_args_t *a)
Definition: application.c:1070
static void session_mq_accepted_reply_handler(void *data)
Definition: session_node.c:228
static void session_evt_add_head_old(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:228
vlib_node_registration_t session_queue_node
(constructor) VLIB_REGISTER_NODE (session_queue_node)
Definition: session_node.c:483
void transport_connection_tx_pacer_reset_bucket(transport_connection_t *tc)
Reset tx pacer bucket.
Definition: transport.c:640
static session_evt_elt_t * session_evt_alloc_ctrl(session_worker_t *wrk)
Definition: session.h:244
u32 elsize
size of an element
Definition: message_queue.h:33
struct clib_bihash_value offset
template key/value backing page structure
static void session_mq_disconnected_handler(void *data)
Definition: session_node.c:335
static u8 session_has_transport(session_t *s)
#define clib_llist_prev_index(E, name)
Definition: llist.h:61
static transport_connection_t * session_tx_get_transport(session_tx_context_t *ctx, u8 peek_data)
Definition: session_node.c:726
u32 app_index
Index of owning app.
Definition: application.h:43
transport_connection_t * tc
Definition: session.h:50
static void session_flush_pending_tx_buffers(session_worker_t *wrk, vlib_node_runtime_t *node)
int app_worker_own_session(app_worker_t *app_wrk, session_t *s)
void vlib_worker_thread_barrier_release(vlib_main_t *vm)
Definition: threads.c:1484
clib_us_time_t last_vlib_us_time
vlib_time_now rounded to us precision and as u64
Definition: session.h:90
static u32 vlib_num_workers()
Definition: threads.h:367
static u32 svm_msg_q_size(svm_msg_q_t *mq)
Check length of message queue.
u32 app_wrk_index
Index of the app worker that owns the session.
u32 transport_connection_snd_space(transport_connection_t *tc, u16 mss)
Get maximum tx burst allowed for transport connection.
Definition: transport.c:670
static void session_mq_listen_handler(void *data)
Definition: session_node.c:36
static int session_tx_fifo_read_and_snd_i(session_worker_t *wrk, vlib_node_runtime_t *node, session_evt_elt_t *elt, int *n_tx_packets, u8 peek_data)
Definition: session_node.c:813
#define clib_llist_remove(LP, name, E)
Remove entry from list.
Definition: llist.h:193
static session_main_t * vnet_get_session_main()
Definition: session.h:585
void session_transport_close(session_t *s)
Notify transport the session can be disconnected.
Definition: session.c:1255
clib_llist_index_t ctrl_head
Head of control events list.
Definition: session.h:111
int app_worker_close_notify(app_worker_t *app_wrk, session_t *s)
static void vlib_set_trace_count(vlib_main_t *vm, vlib_node_runtime_t *rt, u32 count)
Definition: trace_funcs.h:203
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
u32 total_length_not_including_first_buffer
Only valid for first buffer in chain.
Definition: buffer.h:167
#define clib_llist_foreach_safe(LP, name, H, E, body)
Walk list starting at head safe.
Definition: llist.h:275
int vnet_connect_uri(vnet_connect_args_t *a)
int svm_fifo_dequeue_drop(svm_fifo_t *f, u32 len)
Dequeue and drop bytes from fifo.
Definition: svm_fifo.c:1029
static u32 vlib_buffer_alloc(vlib_main_t *vm, u32 *buffers, u32 n_buffers)
Allocate buffers into supplied array.
Definition: buffer_funcs.h:612
vlib_node_registration_t session_queue_process_node
(constructor) VLIB_REGISTER_NODE (session_queue_process_node)
svm_msg_q_t * event_queue
Application listens for events on this svm queue.
Definition: application.h:46
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:85
#define SESSION_EVT(_evt, _args...)
static void session_mq_reset_reply_handler(void *data)
Definition: session_node.c:291
static void session_mq_connect_handler(void *data)
Definition: session_node.c:93
void mq_send_unlisten_reply(app_worker_t *app_wrk, session_handle_t sh, u32 context, int rv)
Definition: session_api.c:443
#define app_check_thread_and_barrier(_fn, _arg)
Definition: session_node.c:28
int session_tx_fifo_dequeue_internal(session_worker_t *wrk, vlib_node_runtime_t *node, session_evt_elt_t *e, int *n_tx_packets)
#define clib_llist_entry_index(LP, E)
Get list entry index.
Definition: llist.h:53
void svm_msg_q_sub_w_lock(svm_msg_q_t *mq, svm_msg_q_msg_t *msg)
Consumer dequeue one message from queue with mutex held.