FD.io VPP  v20.01-48-g3e0dafb74
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->sep_ext.ckpair_index = mp->ckpair_index;
58  a->sep_ext.crypto_engine = mp->crypto_engine;
59  a->app_index = app->app_index;
60  a->wrk_map_index = mp->wrk_index;
61 
62  if ((rv = vnet_listen (a)))
63  clib_warning ("listen returned: %d", rv);
64 
65  app_wrk = application_get_worker (app, mp->wrk_index);
66  mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
67  return;
68 }
69 
70 static void
72 {
74  vnet_listen_args_t _a, *a = &_a;
75  app_worker_t *app_wrk;
76  application_t *app;
77  int rv;
78 
80 
81  app = application_lookup (mp->client_index);
82  if (!app)
83  return;
84 
85  clib_memset (a, 0, sizeof (*a));
86  a->uri = (char *) mp->uri;
87  a->app_index = app->app_index;
88  rv = vnet_bind_uri (a);
89 
90  app_wrk = application_get_worker (app, 0);
91  mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
92 }
93 
94 static void
96 {
98  vnet_connect_args_t _a, *a = &_a;
99  app_worker_t *app_wrk;
100  application_t *app;
101  int rv;
102 
104 
105  app = application_lookup (mp->client_index);
106  if (!app)
107  return;
108 
109  clib_memset (a, 0, sizeof (*a));
110  a->sep.is_ip4 = mp->is_ip4;
111  clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
112  a->sep.port = mp->port;
113  a->sep.transport_proto = mp->proto;
114  a->sep.peer.fib_index = mp->vrf;
115  clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip));
116  a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
117  a->sep_ext.parent_handle = mp->parent_handle;
118  a->sep_ext.ckpair_index = mp->ckpair_index;
119  a->sep_ext.crypto_engine = mp->crypto_engine;
120  a->sep_ext.flags = mp->flags;
121  if (mp->hostname_len)
122  {
123  vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
124  clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
125  }
126  a->api_context = mp->context;
127  a->app_index = app->app_index;
128  a->wrk_map_index = mp->wrk_index;
129 
130  if ((rv = vnet_connect (a)))
131  {
132  clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
133  app_wrk = application_get_worker (app, mp->wrk_index);
135  /* is_fail */ 1);
136  }
137 
138  vec_free (a->sep_ext.hostname);
139 }
140 
141 static void
143 {
145  vnet_connect_args_t _a, *a = &_a;
146  app_worker_t *app_wrk;
147  application_t *app;
148  int rv;
149 
151 
152  app = application_lookup (mp->client_index);
153  if (!app)
154  return;
155 
156  clib_memset (a, 0, sizeof (*a));
157  a->uri = (char *) mp->uri;
158  a->api_context = mp->context;
159  a->app_index = app->app_index;
160  if ((rv = vnet_connect_uri (a)))
161  {
162  clib_warning ("connect_uri returned: %d", rv);
163  app_wrk = application_get_worker (app, 0 /* default wrk only */ );
165  /* is_fail */ 1);
166  }
167 }
168 
169 static void
171 {
173  vnet_disconnect_args_t _a, *a = &_a;
174  application_t *app;
175 
176  app = application_lookup (mp->client_index);
177  if (!app)
178  return;
179 
180  a->app_index = app->app_index;
181  a->handle = mp->handle;
183 }
184 
185 static void
187 {
189  vnet_app_detach_args_t _a, *a = &_a;
190  application_t *app;
191 
193 
194  app = application_lookup (mp->client_index);
195  if (!app)
196  return;
197 
198  a->app_index = app->app_index;
199  a->api_client_index = mp->client_index;
201 }
202 
203 static void
205 {
207  vnet_unlisten_args_t _a, *a = &_a;
208  app_worker_t *app_wrk;
209  application_t *app;
210  int rv;
211 
213 
214  app = application_lookup (mp->client_index);
215  if (!app)
216  return;
217 
218  clib_memset (a, 0, sizeof (*a));
219  a->app_index = app->app_index;
220  a->handle = mp->handle;
221  a->wrk_map_index = mp->wrk_index;
222  if ((rv = vnet_unlisten (a)))
223  clib_warning ("unlisten returned: %d", rv);
224 
225  app_wrk = application_get_worker (app, a->wrk_map_index);
226  if (!app_wrk)
227  return;
228 
229  mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
230 }
231 
232 static void
234 {
236  vnet_disconnect_args_t _a = { 0 }, *a = &_a;
237  session_state_t old_state;
238  app_worker_t *app_wrk;
239  session_t *s;
240 
241  /* Server isn't interested, kill the session */
242  if (mp->retval)
243  {
244  a->app_index = mp->context;
245  a->handle = mp->handle;
247  return;
248  }
249 
250  /* Mail this back from the main thread. We're not polling in main
251  * thread so we're using other workers for notifications. */
252  if (vlib_num_workers () && vlib_get_thread_index () != 0
253  && session_thread_from_handle (mp->handle) == 0)
254  {
256  (u8 *) mp, sizeof (*mp));
257  return;
258  }
259 
261  if (!s)
262  return;
263 
264  app_wrk = app_worker_get (s->app_wrk_index);
265  if (app_wrk->app_index != mp->context)
266  {
267  clib_warning ("app doesn't own session");
268  return;
269  }
270 
271  if (!session_has_transport (s))
272  {
273  s->session_state = SESSION_STATE_READY;
275  return;
276  }
277  else
278  {
279  old_state = s->session_state;
280  s->session_state = SESSION_STATE_READY;
281 
284 
285  /* Closed while waiting for app to reply. Resend disconnect */
286  if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
287  {
288  app_worker_close_notify (app_wrk, s);
289  s->session_state = old_state;
290  return;
291  }
292  }
293 }
294 
295 static void
297 {
298  vnet_disconnect_args_t _a = { 0 }, *a = &_a;
300  app_worker_t *app_wrk;
301  session_t *s;
302  application_t *app;
303  u32 index, thread_index;
304 
305  mp = (session_reset_reply_msg_t *) data;
306  app = application_lookup (mp->context);
307  if (!app)
308  return;
309 
310  session_parse_handle (mp->handle, &index, &thread_index);
311  s = session_get_if_valid (index, thread_index);
312 
313  /* No session or not the right session */
314  if (!s || s->session_state < SESSION_STATE_TRANSPORT_CLOSING)
315  return;
316 
317  app_wrk = app_worker_get (s->app_wrk_index);
318  if (!app_wrk || app_wrk->app_index != app->app_index)
319  {
320  clib_warning ("App %u does not own handle 0x%lx!", app->app_index,
321  mp->handle);
322  return;
323  }
324 
325  /* Client objected to resetting the session, log and continue */
326  if (mp->retval)
327  {
328  clib_warning ("client retval %d", mp->retval);
329  return;
330  }
331 
332  /* This comes as a response to a reset, transport only waiting for
333  * confirmation to remove connection state, no need to disconnect */
334  a->handle = mp->handle;
335  a->app_index = app->app_index;
337 }
338 
339 static void
341 {
343  vnet_disconnect_args_t _a, *a = &_a;
344  svm_msg_q_msg_t _msg, *msg = &_msg;
346  app_worker_t *app_wrk;
347  session_event_t *evt;
348  session_t *s;
349  application_t *app;
350  int rv = 0;
351 
352  mp = (session_disconnected_msg_t *) data;
353  if (!(s = session_get_from_handle_if_valid (mp->handle)))
354  {
355  clib_warning ("could not disconnect handle %llu", mp->handle);
356  return;
357  }
358  app_wrk = app_worker_get (s->app_wrk_index);
359  app = application_lookup (mp->client_index);
360  if (!(app_wrk && app && app->app_index == app_wrk->app_index))
361  {
362  clib_warning ("could not disconnect session: %llu app: %u",
363  mp->handle, mp->client_index);
364  return;
365  }
366 
367  a->handle = mp->handle;
368  a->app_index = app_wrk->wrk_index;
369  rv = vnet_disconnect_session (a);
370 
373  SVM_Q_WAIT, msg);
374  evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
375  clib_memset (evt, 0, sizeof (*evt));
376  evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
377  rmp = (session_disconnected_reply_msg_t *) evt->data;
378  rmp->handle = mp->handle;
379  rmp->context = mp->context;
380  rmp->retval = rv;
381  svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
382 }
383 
384 static void
386 {
388  vnet_disconnect_args_t _a, *a = &_a;
389  application_t *app;
390 
391  mp = (session_disconnected_reply_msg_t *) data;
392 
393  /* Client objected to disconnecting the session, log and continue */
394  if (mp->retval)
395  {
396  clib_warning ("client retval %d", mp->retval);
397  return;
398  }
399 
400  /* Disconnect has been confirmed. Confirm close to transport */
401  app = application_lookup (mp->context);
402  if (app)
403  {
404  a->handle = mp->handle;
405  a->app_index = app->app_index;
407  }
408 }
409 
410 static void
412 {
415  svm_msg_q_msg_t _msg, *msg = &_msg;
416  app_worker_t *app_wrk;
417  u32 owner_app_wrk_map;
418  session_event_t *evt;
419  session_t *s;
420  application_t *app;
421 
422  app = application_lookup (mp->client_index);
423  if (!app)
424  return;
425  if (!(s = session_get_from_handle_if_valid (mp->handle)))
426  {
427  clib_warning ("invalid handle %llu", mp->handle);
428  return;
429  }
430  app_wrk = app_worker_get (s->app_wrk_index);
431  if (app_wrk->app_index != app->app_index)
432  {
433  clib_warning ("app %u does not own session %llu", app->app_index,
434  mp->handle);
435  return;
436  }
437  owner_app_wrk_map = app_wrk->wrk_map_index;
438  app_wrk = application_get_worker (app, mp->wrk_index);
439 
440  /* This needs to come from the new owner */
441  if (mp->req_wrk_index == owner_app_wrk_map)
442  {
444 
447  SVM_Q_WAIT, msg);
448  evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
449  clib_memset (evt, 0, sizeof (*evt));
450  evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
451  wump = (session_req_worker_update_msg_t *) evt->data;
452  wump->session_handle = mp->handle;
453  svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
454  return;
455  }
456 
457  app_worker_own_session (app_wrk, s);
458 
459  /*
460  * Send reply
461  */
464  SVM_Q_WAIT, msg);
465  evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
466  clib_memset (evt, 0, sizeof (*evt));
467  evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
468  rmp = (session_worker_update_reply_msg_t *) evt->data;
469  rmp->handle = mp->handle;
470  rmp->rx_fifo = pointer_to_uword (s->rx_fifo);
471  rmp->tx_fifo = pointer_to_uword (s->tx_fifo);
473  svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
474 
475  /*
476  * Retransmit messages that may have been lost
477  */
478  if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
480 
481  if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
483 
484  if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
485  app_worker_close_notify (app_wrk, s);
486 }
487 
489 
490 typedef struct
491 {
495 
496 /* packet trace format function */
497 static u8 *
498 format_session_queue_trace (u8 * s, va_list * args)
499 {
500  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
501  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
502  session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
503 
504  s = format (s, "session index %d thread index %d",
506  return s;
507 }
508 
509 #define foreach_session_queue_error \
510 _(TX, "Packets transmitted") \
511 _(TIMER, "Timer events") \
512 _(NO_BUFFER, "Out of buffers")
513 
514 typedef enum
515 {
516 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
518 #undef _
521 
522 static char *session_queue_error_strings[] = {
523 #define _(sym,string) string,
525 #undef _
526 };
527 
528 enum
529 {
533 };
534 
535 static void
537  u32 next_index, u32 * to_next, u16 n_segs,
538  session_t * s, u32 n_trace)
539 {
541  vlib_buffer_t *b;
542  int i;
543 
544  for (i = 0; i < clib_min (n_trace, n_segs); i++)
545  {
546  b = vlib_get_buffer (vm, to_next[i]);
547  vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
548  t = vlib_add_trace (vm, node, b, sizeof (*t));
551  }
552  vlib_set_trace_count (vm, node, n_trace - i);
553 }
554 
555 always_inline void
557  vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
558 {
559  vlib_buffer_t *chain_b, *prev_b;
560  u32 chain_bi0, to_deq, left_from_seg;
561  session_worker_t *wrk;
562  u16 len_to_deq, n_bytes_read;
563  u8 *data, j;
564 
565  wrk = session_main_get_worker (ctx->s->thread_index);
566  b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
568 
569  chain_b = b;
570  left_from_seg = clib_min (ctx->snd_mss - b->current_length,
571  ctx->left_to_snd);
572  to_deq = left_from_seg;
573  for (j = 1; j < ctx->n_bufs_per_seg; j++)
574  {
575  prev_b = chain_b;
576  len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
577 
578  *n_bufs -= 1;
579  chain_bi0 = wrk->tx_buffers[*n_bufs];
580  chain_b = vlib_get_buffer (vm, chain_bi0);
581  chain_b->current_data = 0;
582  data = vlib_buffer_get_current (chain_b);
583  if (peek_data)
584  {
585  n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
586  ctx->tx_offset, len_to_deq, data);
587  ctx->tx_offset += n_bytes_read;
588  }
589  else
590  {
591  if (ctx->transport_vft->transport_options.tx_type ==
593  {
594  svm_fifo_t *f = ctx->s->tx_fifo;
595  session_dgram_hdr_t *hdr = &ctx->hdr;
596  u16 deq_now;
597  deq_now = clib_min (hdr->data_length - hdr->data_offset,
598  len_to_deq);
599  n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
600  data);
601  ASSERT (n_bytes_read > 0);
602 
603  hdr->data_offset += n_bytes_read;
604  if (hdr->data_offset == hdr->data_length)
605  {
607  svm_fifo_dequeue_drop (f, offset);
608  }
609  }
610  else
611  n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
612  len_to_deq, data);
613  }
614  ASSERT (n_bytes_read == len_to_deq);
615  chain_b->current_length = n_bytes_read;
617 
618  /* update previous buffer */
619  prev_b->next_buffer = chain_bi0;
620  prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
621 
622  /* update current buffer */
623  chain_b->next_buffer = 0;
624 
625  to_deq -= n_bytes_read;
626  if (to_deq == 0)
627  break;
628  }
629  ASSERT (to_deq == 0
630  && b->total_length_not_including_first_buffer == left_from_seg);
631  ctx->left_to_snd -= left_from_seg;
632 }
633 
634 always_inline void
636  vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
637 {
638  u32 len_to_deq;
639  u8 *data0;
640  int n_bytes_read;
641 
642  /*
643  * Start with the first buffer in chain
644  */
645  b->error = 0;
646  b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
647  b->current_data = 0;
648 
650  len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
651 
652  if (peek_data)
653  {
654  n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->tx_offset,
655  len_to_deq, data0);
656  ASSERT (n_bytes_read > 0);
657  /* Keep track of progress locally, transport is also supposed to
658  * increment it independently when pushing the header */
659  ctx->tx_offset += n_bytes_read;
660  }
661  else
662  {
663  if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
664  {
665  session_dgram_hdr_t *hdr = &ctx->hdr;
666  svm_fifo_t *f = ctx->s->tx_fifo;
667  u16 deq_now;
668  u32 offset;
669 
670  ASSERT (hdr->data_length > hdr->data_offset);
671  deq_now = clib_min (hdr->data_length - hdr->data_offset,
672  len_to_deq);
673  offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
674  n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
675  ASSERT (n_bytes_read > 0);
676 
677  if (ctx->s->session_state == SESSION_STATE_LISTENING)
678  {
679  ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
680  ctx->tc->rmt_port = hdr->rmt_port;
681  }
682  hdr->data_offset += n_bytes_read;
683  if (hdr->data_offset == hdr->data_length)
684  {
685  offset = hdr->data_length + SESSION_CONN_HDR_LEN;
686  svm_fifo_dequeue_drop (f, offset);
687  }
688  }
689  else
690  {
691  n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
692  len_to_deq, data0);
693  ASSERT (n_bytes_read > 0);
694  }
695  }
696  b->current_length = n_bytes_read;
697  ctx->left_to_snd -= n_bytes_read;
698 
699  /*
700  * Fill in the remaining buffers in the chain, if any
701  */
702  if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
703  session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
704 }
705 
708 {
709  if (peek_data)
710  {
711  if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
712  return 0;
713  /* Can retransmit for closed sessions but can't send new data if
714  * session is not ready or closed */
715  else if (s->session_state < SESSION_STATE_READY)
716  return 1;
717  else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
718  {
719  /* Allow closed transports to still send custom packets.
720  * For instance, tcp may want to send acks in time-wait. */
721  if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
722  && (s->flags & SESSION_F_CUSTOM_TX))
723  return 0;
724  return 2;
725  }
726  }
727  return 0;
728 }
729 
732 {
733  if (peek_data)
734  {
735  return ctx->transport_vft->get_connection (ctx->s->connection_index,
736  ctx->s->thread_index);
737  }
738  else
739  {
740  if (ctx->s->session_state == SESSION_STATE_LISTENING)
741  return ctx->transport_vft->get_listener (ctx->s->connection_index);
742  else
743  {
744  return ctx->transport_vft->get_connection (ctx->s->connection_index,
745  ctx->s->thread_index);
746  }
747  }
748 }
749 
750 always_inline void
752  u32 max_segs, u8 peek_data)
753 {
754  u32 n_bytes_per_buf, n_bytes_per_seg;
756  if (peek_data)
757  {
758  /* Offset in rx fifo from where to peek data */
759  ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
760  if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
761  {
762  ctx->max_len_to_snd = 0;
763  return;
764  }
765  ctx->max_dequeue -= ctx->tx_offset;
766  }
767  else
768  {
769  if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
770  {
771  if (ctx->max_dequeue <= sizeof (ctx->hdr))
772  {
773  ctx->max_len_to_snd = 0;
774  return;
775  }
776  svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
777  (u8 *) & ctx->hdr);
778  ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
779  ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
780  }
781  }
782  ASSERT (ctx->max_dequeue > 0);
783 
784  /* Ensure we're not writing more than transport window allows */
785  if (ctx->max_dequeue < ctx->snd_space)
786  {
787  /* Constrained by tx queue. Try to send only fully formed segments */
788  ctx->max_len_to_snd =
789  (ctx->max_dequeue > ctx->snd_mss) ?
790  ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
791  /* TODO Nagle ? */
792  }
793  else
794  {
795  /* Expectation is that snd_space0 is already a multiple of snd_mss */
796  ctx->max_len_to_snd = ctx->snd_space;
797  }
798 
799  /* Check if we're tx constrained by the node */
800  ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
801  if (ctx->n_segs_per_evt > max_segs)
802  {
803  ctx->n_segs_per_evt = max_segs;
804  ctx->max_len_to_snd = max_segs * ctx->snd_mss;
805  }
806 
807  n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
808  ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
809  n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->snd_mss;
810  ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
811  ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
812  ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
813  n_bytes_per_buf -
815 }
816 
817 always_inline int
820  session_evt_elt_t * elt,
821  int *n_tx_packets, u8 peek_data)
822 {
823  u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
824  session_tx_context_t *ctx = &wrk->ctx;
826  session_event_t *e = &elt->evt;
827  vlib_main_t *vm = wrk->vm;
829  vlib_buffer_t *pb;
830  u16 n_bufs, rv;
831 
832  if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
833  {
834  if (rv < 2)
835  session_evt_add_old (wrk, elt);
836  return SESSION_TX_NO_DATA;
837  }
838 
839  next_index = smm->session_type_to_next[ctx->s->session_type];
840  max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
841 
842  tp = session_get_transport_proto (ctx->s);
844  ctx->tc = session_tx_get_transport (ctx, peek_data);
845 
846  if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
847  {
848  if (ctx->transport_vft->flush_data)
849  ctx->transport_vft->flush_data (ctx->tc);
850  e->event_type = SESSION_IO_EVT_TX;
851  }
852 
853  if (ctx->s->flags & SESSION_F_CUSTOM_TX)
854  {
855  u32 n_custom_tx;
856  ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
857  n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, max_burst);
858  *n_tx_packets += n_custom_tx;
859  if (PREDICT_FALSE
860  (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
861  return SESSION_TX_OK;
862  max_burst -= n_custom_tx;
863  if (!max_burst)
864  {
865  session_evt_add_old (wrk, elt);
866  return SESSION_TX_OK;
867  }
868  }
869 
870  ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
871  if (PREDICT_FALSE (ctx->snd_mss == 0))
872  {
873  session_evt_add_old (wrk, elt);
874  return SESSION_TX_NO_DATA;
875  }
876 
878 
879  /* This flow queue is "empty" so it should be re-evaluated before
880  * the ones that have data to send. */
881  if (!ctx->snd_space)
882  {
883  session_evt_add_head_old (wrk, elt);
884  return SESSION_TX_NO_DATA;
885  }
886 
888  {
889  u32 snd_space = transport_connection_tx_pacer_burst (ctx->tc);
890  if (snd_space < TRANSPORT_PACER_MIN_BURST)
891  {
892  session_evt_add_head_old (wrk, elt);
893  return SESSION_TX_NO_DATA;
894  }
895  snd_space = clib_min (ctx->snd_space, snd_space);
896  ctx->snd_space = snd_space >= ctx->snd_mss ?
897  snd_space - snd_space % ctx->snd_mss : snd_space;
898  }
899 
900  /* Allow enqueuing of a new event */
902 
903  /* Check how much we can pull. */
904  session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
905 
906  if (PREDICT_FALSE (!ctx->max_len_to_snd))
907  {
909  return SESSION_TX_NO_DATA;
910  }
911 
912  n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
913  vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
915  n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
916  if (PREDICT_FALSE (n_bufs < n_bufs_needed))
917  {
918  if (n_bufs)
919  vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
920  if (svm_fifo_set_event (ctx->s->tx_fifo))
921  session_evt_add_head_old (wrk, elt);
923  SESSION_QUEUE_ERROR_NO_BUFFER, 1);
924  return SESSION_TX_NO_BUFFERS;
925  }
926 
927  ctx->left_to_snd = ctx->max_len_to_snd;
928  n_left = ctx->n_segs_per_evt;
929 
930  while (n_left >= 4)
931  {
932  vlib_buffer_t *b0, *b1;
933  u32 bi0, bi1;
934 
935  pbi = wrk->tx_buffers[n_bufs - 3];
936  pb = vlib_get_buffer (vm, pbi);
937  vlib_prefetch_buffer_header (pb, STORE);
938  pbi = wrk->tx_buffers[n_bufs - 4];
939  pb = vlib_get_buffer (vm, pbi);
940  vlib_prefetch_buffer_header (pb, STORE);
941 
942  bi0 = wrk->tx_buffers[--n_bufs];
943  bi1 = wrk->tx_buffers[--n_bufs];
944 
945  b0 = vlib_get_buffer (vm, bi0);
946  b1 = vlib_get_buffer (vm, bi1);
947 
948  session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
949  session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
950 
951  ctx->transport_vft->push_header (ctx->tc, b0);
952  ctx->transport_vft->push_header (ctx->tc, b1);
953 
954  n_left -= 2;
955 
958 
959  vec_add1 (wrk->pending_tx_buffers, bi0);
960  vec_add1 (wrk->pending_tx_buffers, bi1);
961  vec_add1 (wrk->pending_tx_nexts, next_index);
962  vec_add1 (wrk->pending_tx_nexts, next_index);
963  }
964  while (n_left)
965  {
966  vlib_buffer_t *b0;
967  u32 bi0;
968 
969  if (n_left > 1)
970  {
971  pbi = wrk->tx_buffers[n_bufs - 2];
972  pb = vlib_get_buffer (vm, pbi);
973  vlib_prefetch_buffer_header (pb, STORE);
974  }
975 
976  bi0 = wrk->tx_buffers[--n_bufs];
977  b0 = vlib_get_buffer (vm, bi0);
978  session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
979 
980  /* Ask transport to push header after current_length and
981  * total_length_not_including_first_buffer are updated */
982  ctx->transport_vft->push_header (ctx->tc, b0);
983 
984  n_left -= 1;
985 
987 
988  vec_add1 (wrk->pending_tx_buffers, bi0);
989  vec_add1 (wrk->pending_tx_nexts, next_index);
990  }
991 
992  if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
993  session_tx_trace_frame (vm, node, next_index, wrk->pending_tx_buffers,
994  ctx->n_segs_per_evt, ctx->s, n_trace);
995 
996  if (PREDICT_FALSE (n_bufs))
997  vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
998 
999  *n_tx_packets += ctx->n_segs_per_evt;
1001 
1002  SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
1003  ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
1004 
1005  /* If we couldn't dequeue all bytes mark as partially read */
1006  ASSERT (ctx->left_to_snd == 0);
1007  if (ctx->max_len_to_snd < ctx->max_dequeue)
1008  if (svm_fifo_set_event (ctx->s->tx_fifo))
1009  session_evt_add_old (wrk, elt);
1010 
1011  if (!peek_data
1012  && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
1013  {
1014  /* Fix dgram pre header */
1015  if (ctx->max_len_to_snd < ctx->max_dequeue)
1016  svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
1017  sizeof (session_dgram_pre_hdr_t));
1018  /* More data needs to be read */
1019  else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
1020  if (svm_fifo_set_event (ctx->s->tx_fifo))
1021  session_evt_add_old (wrk, elt);
1022 
1023  if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1024  session_dequeue_notify (ctx->s);
1025  }
1026  return SESSION_TX_OK;
1027 }
1028 
1029 int
1032  session_evt_elt_t * e, int *n_tx_packets)
1033 {
1034  return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1035 }
1036 
1037 int
1040  session_evt_elt_t * e, int *n_tx_packets)
1041 {
1042  return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1043 }
1044 
1045 int
1048  session_evt_elt_t * e, int *n_tx_packets)
1049 {
1050  session_t *s = wrk->ctx.s;
1051 
1052  if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1053  return 0;
1056  VLIB_FRAME_SIZE - *n_tx_packets);
1057 }
1058 
1060 session_event_get_session (session_event_t * e, u8 thread_index)
1061 {
1062  return session_get_if_valid (e->session_index, thread_index);
1063 }
1064 
1065 always_inline void
1067 {
1068  clib_llist_index_t ei;
1069  void (*fp) (void *);
1070  session_event_t *e;
1071  session_t *s;
1072 
1073  ei = clib_llist_entry_index (wrk->event_elts, elt);
1074  e = &elt->evt;
1075 
1076  switch (e->event_type)
1077  {
1078  case SESSION_CTRL_EVT_RPC:
1079  fp = e->rpc_args.fp;
1080  (*fp) (e->rpc_args.arg);
1081  break;
1083  s = session_get_from_handle_if_valid (e->session_handle);
1084  if (PREDICT_FALSE (!s))
1085  break;
1087  break;
1089  s = session_get_from_handle_if_valid (e->session_handle);
1090  if (PREDICT_FALSE (!s))
1091  break;
1093  break;
1096  break;
1099  break;
1102  break;
1105  break;
1108  break;
1111  break;
1114  break;
1117  break;
1120  elt));
1121  break;
1124  break;
1127  break;
1130  break;
1131  default:
1132  clib_warning ("unhandled event type %d", e->event_type);
1133  }
1134 
1135  /* Regrab elements in case pool moved */
1136  elt = pool_elt_at_index (wrk->event_elts, ei);
1137  if (!clib_llist_elt_is_linked (elt, evt_list))
1138  {
1139  e = &elt->evt;
1140  if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1141  session_evt_ctrl_data_free (wrk, elt);
1142  session_evt_elt_free (wrk, elt);
1143  }
1144 }
1145 
1146 always_inline void
1148  session_evt_elt_t * elt, u32 thread_index,
1149  int *n_tx_packets)
1150 {
1151  session_main_t *smm = &session_main;
1152  app_worker_t *app_wrk;
1153  clib_llist_index_t ei;
1154  session_event_t *e;
1155  session_t *s;
1156 
1157  ei = clib_llist_entry_index (wrk->event_elts, elt);
1158  e = &elt->evt;
1159 
1160  switch (e->event_type)
1161  {
1163  case SESSION_IO_EVT_TX:
1164  s = session_event_get_session (e, thread_index);
1165  if (PREDICT_FALSE (!s))
1166  break;
1168  wrk->ctx.s = s;
1169  /* Spray packets in per session type frames, since they go to
1170  * different nodes */
1171  (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1172  break;
1173  case SESSION_IO_EVT_RX:
1174  s = session_event_get_session (e, thread_index);
1175  if (!s)
1176  break;
1179  break;
1181  s = session_event_get_session (e, thread_index);
1182  if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1183  break;
1185  app_wrk = app_worker_get (s->app_wrk_index);
1186  app_worker_builtin_rx (app_wrk, s);
1187  break;
1189  s = session_get_from_handle_if_valid (e->session_handle);
1190  wrk->ctx.s = s;
1191  if (PREDICT_TRUE (s != 0))
1192  session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1193  break;
1194  default:
1195  clib_warning ("unhandled event type %d", e->event_type);
1196  }
1197 
1198  /* Regrab elements in case pool moved */
1199  elt = pool_elt_at_index (wrk->event_elts, ei);
1200  if (!clib_llist_elt_is_linked (elt, evt_list))
1201  session_evt_elt_free (wrk, elt);
1202 }
1203 
1204 /* *INDENT-OFF* */
1205 static const u32 session_evt_msg_sizes[] = {
1206 #define _(symc, sym) \
1207  [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1209 #undef _
1210 };
1211 /* *INDENT-ON* */
1212 
1213 always_inline void
1214 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1215 {
1216  session_evt_elt_t *elt;
1217 
1218  if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1219  {
1220  elt = session_evt_alloc_ctrl (wrk);
1221  if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1222  {
1223  elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1224  elt->evt.event_type = evt->event_type;
1225  clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1226  session_evt_msg_sizes[evt->event_type]);
1227  }
1228  else
1229  {
1230  /* Internal control events fit into io events footprint */
1231  clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1232  }
1233  }
1234  else
1235  {
1236  elt = session_evt_alloc_new (wrk);
1237  clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1238  }
1239 }
1240 
1241 static void
1244 {
1246  wrk->pending_tx_nexts,
1247  vec_len (wrk->pending_tx_nexts));
1250 }
1251 
1252 static uword
1254  vlib_frame_t * frame)
1255 {
1257  u32 thread_index = vm->thread_index, n_to_dequeue;
1258  session_worker_t *wrk = &smm->wrk[thread_index];
1259  session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1260  svm_msg_q_msg_t _msg, *msg = &_msg;
1261  clib_llist_index_t old_ti;
1262  int i, n_tx_packets = 0;
1263  session_event_t *evt;
1264  svm_msg_q_t *mq;
1265 
1266  SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1267 
1268  wrk->last_vlib_time = vlib_time_now (vm);
1270 
1271  /*
1272  * Update transport time
1273  */
1274  transport_update_time (wrk->last_vlib_time, thread_index);
1275 
1276  /*
1277  * Dequeue and handle new events
1278  */
1279 
1280  /* Try to dequeue what is available. Don't wait for lock.
1281  * XXX: we may need priorities here */
1282  mq = wrk->vpp_event_queue;
1283  n_to_dequeue = svm_msg_q_size (mq);
1284  if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
1285  {
1286  for (i = 0; i < n_to_dequeue; i++)
1287  {
1288  svm_msg_q_sub_w_lock (mq, msg);
1289  evt = svm_msg_q_msg_data (mq, msg);
1290  session_evt_add_to_list (wrk, evt);
1291  svm_msg_q_free_msg (mq, msg);
1292  }
1293  svm_msg_q_unlock (mq);
1294  }
1295 
1296  /*
1297  * Handle control events
1298  */
1299 
1300  ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
1301 
1302  /* *INDENT-OFF* */
1303  clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
1304  clib_llist_remove (wrk->event_elts, evt_list, elt);
1305  session_event_dispatch_ctrl (wrk, elt);
1306  }));
1307  /* *INDENT-ON* */
1308 
1309  /*
1310  * Handle the new io events.
1311  */
1312 
1313  new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
1314  old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1315  old_ti = clib_llist_prev_index (old_he, evt_list);
1316 
1317  /* *INDENT-OFF* */
1318  clib_llist_foreach_safe (wrk->event_elts, evt_list, new_he, elt, ({
1319  session_evt_type_t et;
1320 
1321  et = elt->evt.event_type;
1322  clib_llist_remove (wrk->event_elts, evt_list, elt);
1323 
1324  /* Postpone tx events if we can't handle them this dispatch cycle */
1325  if (n_tx_packets >= VLIB_FRAME_SIZE
1326  && (et == SESSION_IO_EVT_TX || et == SESSION_IO_EVT_TX_FLUSH))
1327  {
1328  clib_llist_add (wrk->event_elts, evt_list, elt, new_he);
1329  continue;
1330  }
1331 
1332  session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1333  }));
1334  /* *INDENT-ON* */
1335 
1336  /*
1337  * Handle the old io events, if we had any prior to processing the new ones
1338  */
1339 
1340  if (old_ti != wrk->old_head)
1341  {
1342  clib_llist_index_t ei, next_ei;
1343 
1344  old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1345  ei = clib_llist_next_index (old_he, evt_list);
1346 
1347  while (n_tx_packets < VLIB_FRAME_SIZE)
1348  {
1349  elt = pool_elt_at_index (wrk->event_elts, ei);
1350  next_ei = clib_llist_next_index (elt, evt_list);
1351  clib_llist_remove (wrk->event_elts, evt_list, elt);
1352 
1353  session_event_dispatch_io (wrk, node, elt, thread_index,
1354  &n_tx_packets);
1355 
1356  if (ei == old_ti)
1357  break;
1358 
1359  ei = next_ei;
1360  };
1361  }
1362 
1363  if (vec_len (wrk->pending_tx_buffers))
1365 
1367  SESSION_QUEUE_ERROR_TX, n_tx_packets);
1368 
1369  SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1370 
1371  return n_tx_packets;
1372 }
1373 
1374 /* *INDENT-OFF* */
1376 {
1377  .function = session_queue_node_fn,
1379  .name = "session-queue",
1380  .format_trace = format_session_queue_trace,
1381  .type = VLIB_NODE_TYPE_INPUT,
1382  .n_errors = ARRAY_LEN (session_queue_error_strings),
1383  .error_strings = session_queue_error_strings,
1384  .state = VLIB_NODE_STATE_DISABLED,
1385 };
1386 /* *INDENT-ON* */
1387 
1388 void
1390 {
1393  u32 my_thread_index = vm->thread_index;
1394  session_event_t _e, *e = &_e;
1395  svm_msg_q_ring_t *ring;
1396  session_t *s0;
1397  svm_msg_q_msg_t *msg;
1398  svm_msg_q_t *mq;
1399  int i, index;
1400 
1401  mq = smm->wrk[my_thread_index].vpp_event_queue;
1402  index = mq->q->head;
1403 
1404  for (i = 0; i < mq->q->cursize; i++)
1405  {
1406  msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1407  ring = svm_msg_q_ring (mq, msg->ring_index);
1408  clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1409 
1410  switch (e->event_type)
1411  {
1412  case SESSION_IO_EVT_TX:
1413  s0 = session_event_get_session (e, my_thread_index);
1414  fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
1415  break;
1416 
1418  s0 = session_get_from_handle (e->session_handle);
1419  fformat (stdout, "[%04d] disconnect session %d\n", i,
1420  s0->session_index);
1421  break;
1422 
1424  s0 = session_event_get_session (e, my_thread_index);
1425  fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
1426  break;
1427 
1428  case SESSION_CTRL_EVT_RPC:
1429  fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1430  i, (u64) (uword) (e->rpc_args.fp),
1431  (u64) (uword) (e->rpc_args.arg));
1432  break;
1433 
1434  default:
1435  fformat (stdout, "[%04d] unhandled event type %d\n",
1436  i, e->event_type);
1437  break;
1438  }
1439 
1440  index++;
1441 
1442  if (index == mq->q->maxsize)
1443  index = 0;
1444  }
1445 }
1446 
1447 static u8
1448 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1449 {
1450  session_t *s;
1451  switch (e->event_type)
1452  {
1453  case SESSION_IO_EVT_RX:
1454  case SESSION_IO_EVT_TX:
1458  if (e->session_index == f->master_session_index)
1459  return 1;
1460  break;
1462  break;
1463  case SESSION_CTRL_EVT_RPC:
1464  s = session_get_from_handle (e->session_handle);
1465  if (!s)
1466  {
1467  clib_warning ("session has event but doesn't exist!");
1468  break;
1469  }
1470  if (s->rx_fifo == f || s->tx_fifo == f)
1471  return 1;
1472  break;
1473  default:
1474  break;
1475  }
1476  return 0;
1477 }
1478 
1479 u8
1480 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1481 {
1482  session_evt_elt_t *elt;
1483  session_worker_t *wrk;
1484  int i, index, found = 0;
1485  svm_msg_q_msg_t *msg;
1486  svm_msg_q_ring_t *ring;
1487  svm_msg_q_t *mq;
1488  u8 thread_index;
1489 
1490  ASSERT (e);
1491  thread_index = f->master_thread_index;
1492  wrk = session_main_get_worker (thread_index);
1493 
1494  /*
1495  * Search evt queue
1496  */
1497  mq = wrk->vpp_event_queue;
1498  index = mq->q->head;
1499  for (i = 0; i < mq->q->cursize; i++)
1500  {
1501  msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1502  ring = svm_msg_q_ring (mq, msg->ring_index);
1503  clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1504  found = session_node_cmp_event (e, f);
1505  if (found)
1506  return 1;
1507  index = (index + 1) % mq->q->maxsize;
1508  }
1509  /*
1510  * Search pending events vector
1511  */
1512 
1513  /* *INDENT-OFF* */
1514  clib_llist_foreach (wrk->event_elts, evt_list,
1515  pool_elt_at_index (wrk->event_elts, wrk->new_head),
1516  elt, ({
1517  found = session_node_cmp_event (&elt->evt, f);
1518  if (found)
1519  {
1520  clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1521  goto done;
1522  }
1523  }));
1524  /* *INDENT-ON* */
1525 
1526  /* *INDENT-OFF* */
1527  clib_llist_foreach (wrk->event_elts, evt_list,
1528  pool_elt_at_index (wrk->event_elts, wrk->old_head),
1529  elt, ({
1530  found = session_node_cmp_event (&elt->evt, f);
1531  if (found)
1532  {
1533  clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1534  goto done;
1535  }
1536  }));
1537  /* *INDENT-ON* */
1538 
1539 done:
1540  return found;
1541 }
1542 
1543 static clib_error_t *
1545 {
1546  if (vec_len (vlib_mains) < 2)
1547  return 0;
1548 
1549  /*
1550  * Shut off (especially) worker-thread session nodes.
1551  * Otherwise, vpp can crash as the main thread unmaps the
1552  * API segment.
1553  */
1555  session_node_enable_disable (0 /* is_enable */ );
1557  return 0;
1558 }
1559 
1561 
1562 static uword
1564  vlib_frame_t * f)
1565 {
1566  f64 now, timeout = 1.0;
1567  uword *event_data = 0;
1568  uword event_type;
1569 
1570  while (1)
1571  {
1573  now = vlib_time_now (vm);
1574  event_type = vlib_process_get_events (vm, (uword **) & event_data);
1575 
1576  switch (event_type)
1577  {
1579  /* Flush the frames by updating all transports times */
1580  transport_update_time (now, 0);
1581  break;
1583  timeout = 100000.0;
1584  break;
1585  case ~0:
1586  /* Timed out. Update time for all transports to trigger all
1587  * outstanding retransmits. */
1588  transport_update_time (now, 0);
1589  break;
1590  }
1591  vec_reset_length (event_data);
1592  }
1593  return 0;
1594 }
1595 
1596 /* *INDENT-OFF* */
1598 {
1599  .function = session_queue_process,
1600  .type = VLIB_NODE_TYPE_PROCESS,
1601  .name = "session-queue-process",
1602  .state = VLIB_NODE_STATE_DISABLED,
1603 };
1604 /* *INDENT-ON* */
1605 
1608  vlib_frame_t * frame)
1609 {
1611  if (!sm->wrk[0].vpp_event_queue)
1612  return 0;
1613  node = vlib_node_get_runtime (vm, session_queue_node.index);
1614  return session_queue_node_fn (vm, node, frame);
1615 }
1616 
1617 /* *INDENT-OFF* */
1619 {
1620  .function = session_queue_pre_input_inline,
1621  .type = VLIB_NODE_TYPE_PRE_INPUT,
1622  .name = "session-queue-main",
1623  .state = VLIB_NODE_STATE_DISABLED,
1624 };
1625 /* *INDENT-ON* */
1626 
1627 /*
1628  * fd.io coding-style-patch-verification: ON
1629  *
1630  * Local Variables:
1631  * eval: (c-set-style "gnu")
1632  * End:
1633  */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:440
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:536
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:1943
void session_transport_reset(session_t *s)
Force transport close.
Definition: session.c:1285
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:186
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:204
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:205
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:890
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:578
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:71
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:302
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:523
static transport_proto_t session_get_transport_proto(session_t *s)
application_t * application_lookup(u32 api_client_index)
Definition: application.c:394
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:1045
session_evt_elt_t * event_elts
Pool of session event list elements.
Definition: session.h:105
static void * session_evt_ctrl_data(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:256
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:451
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:1572
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:650
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:635
static u32 session_evt_ctrl_data_alloc(session_worker_t *wrk)
Definition: session.h:238
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:723
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:170
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:591
static session_worker_t * session_main_get_worker(u32 thread_index)
Definition: session.h:593
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:142
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:499
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:80
#define VLIB_FRAME_SIZE
Definition: node.h:378
session_state_t
static char * session_queue_error_strings[]
Definition: session_node.c:522
int session_dequeue_notify(session_t *s)
Definition: session.c:629
transport_proto_vft_t * transport_protocol_get_vft(transport_proto_t transport_proto)
Get transport virtual function table.
Definition: transport.c:257
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:519
#define CLIB_US_TIME_FREQ
Definition: time.h:201
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:315
session_queue_error_t
Definition: session_node.c:514
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:263
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:388
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
#define always_inline
Definition: ipsec.h:28
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:28
static void svm_fifo_unset_event(svm_fifo_t *f)
Unset fifo event flag.
Definition: svm_fifo.h:762
static u8 transport_connection_is_tx_paced(transport_connection_t *tc)
Check if transport connection is paced.
Definition: transport.h:246
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:168
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:1403
vlib_main_t * vm
Definition: in2out_ed.c:1810
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:324
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:749
#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:308
static void session_evt_elt_free(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:217
#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:840
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:556
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:218
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
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:342
#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
static vlib_node_runtime_t * vlib_node_get_runtime(vlib_main_t *vm, u32 node_index)
Get node runtime by node index.
Definition: node_funcs.h:89
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:270
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.
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1810
static u32 session_thread_from_handle(session_handle_t handle)
#define SESSION_Q_PROCESS_STOP
Definition: session.h:206
u32 ring_index
ring index, could be u8
Definition: message_queue.h:62
#define foreach_session_queue_error
Definition: session_node.c:509
#define ASSERT(truth)
static void session_mq_disconnected_reply_handler(void *data)
Definition: session_node.c:385
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:138
void transport_connection_tx_pacer_reset_bucket(transport_connection_t *tc, u32 bucket)
Reset tx pacer bucket.
Definition: transport.c:672
int ct_session_connect_notify(session_t *ss)
u8 data[128]
Definition: ipsec_types.api:87
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:709
int vnet_listen(vnet_listen_args_t *a)
Definition: application.c:953
int vnet_application_detach(vnet_app_detach_args_t *a)
Detach application from vpp.
Definition: application.c:875
u32 clib_llist_index_t
Definition: llist.h:27
static u32 transport_connection_snd_space(transport_connection_t *tc)
Get maximum tx burst allowed for transport connection.
Definition: transport.h:159
#define TRANSPORT_PACER_MIN_BURST
Definition: transport.h:23
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:1007
static u8 * format_session_queue_trace(u8 *s, va_list *args)
Definition: session_node.c:498
static int transport_app_rx_evt(transport_proto_t tp, u32 conn_index, u32 thread_index)
Definition: transport.h:144
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:751
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:1873
static u8 session_tx_not_ready(session_t *s, u8 peek_data)
Definition: session_node.c:707
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:492
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:411
static void session_evt_add_old(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:223
int vnet_disconnect_session(vnet_disconnect_args_t *a)
Definition: application.c:1076
static void session_mq_accepted_reply_handler(void *data)
Definition: session_node.c:233
static void session_evt_add_head_old(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:230
vlib_node_registration_t session_queue_node
(constructor) VLIB_REGISTER_NODE (session_queue_node)
Definition: session_node.c:488
static session_evt_elt_t * session_evt_alloc_ctrl(session_worker_t *wrk)
Definition: session.h:246
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:340
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:731
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:1496
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:372
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.
vlib_main_t vlib_node_runtime_t vlib_frame_t * frame
Definition: in2out_ed.c:1811
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:818
#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:587
void session_transport_close(session_t *s)
Notify transport the session can be disconnected.
Definition: session.c:1257
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:630
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:296
u32 transport_connection_tx_pacer_burst(transport_connection_t *tc)
Get tx pacer max burst.
Definition: transport.c:696
static void session_mq_connect_handler(void *data)
Definition: session_node.c:95
void mq_send_unlisten_reply(app_worker_t *app_wrk, session_handle_t sh, u32 context, int rv)
Definition: session_api.c:448
#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.