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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
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>
22 #include <vnet/session/application.h>
23 #include <vnet/session/application_interface.h>
24 #include <vnet/session/application_local.h>
25 #include <vnet/session/session_debug.h>
26 #include <svm/queue.h>
28 #define app_check_thread_and_barrier(_fn, _arg) \
29 if (!vlib_thread_is_main_w_barrier ()) \
31 vlib_rpc_call_main_thread (_fn, (u8 *) _arg, sizeof(*_arg)); \
36 session_mq_listen_handler (void *data)
38 session_listen_msg_t *mp = (session_listen_msg_t *) data;
39 vnet_listen_args_t _a, *a = &_a;
40 app_worker_t *app_wrk;
44 app_check_thread_and_barrier (session_mq_listen_handler, mp);
46 app = application_lookup (mp->client_index);
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;
60 if ((rv = vnet_listen (a)))
61 clib_warning ("listen returned: %d", rv);
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);
69 session_mq_listen_uri_handler (void *data)
71 session_listen_uri_msg_t *mp = (session_listen_uri_msg_t *) data;
72 vnet_listen_args_t _a, *a = &_a;
73 app_worker_t *app_wrk;
77 app_check_thread_and_barrier (session_mq_listen_uri_handler, mp);
79 app = application_lookup (mp->client_index);
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);
88 app_wrk = application_get_worker (app, 0);
89 mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
93 session_mq_connect_handler (void *data)
95 session_connect_msg_t *mp = (session_connect_msg_t *) data;
96 vnet_connect_args_t _a, *a = &_a;
97 app_worker_t *app_wrk;
101 app_check_thread_and_barrier (session_mq_connect_handler, mp);
103 app = application_lookup (mp->client_index);
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 a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
114 a->sep_ext.parent_handle = mp->parent_handle;
115 if (mp->hostname_len)
117 vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
118 clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
120 a->api_context = mp->context;
121 a->app_index = app->app_index;
122 a->wrk_map_index = mp->wrk_index;
124 if ((rv = vnet_connect (a)))
126 clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
127 app_wrk = application_get_worker (app, mp->wrk_index);
128 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
132 vec_free (a->sep_ext.hostname);
136 session_mq_connect_uri_handler (void *data)
138 session_connect_uri_msg_t *mp = (session_connect_uri_msg_t *) data;
139 vnet_connect_args_t _a, *a = &_a;
140 app_worker_t *app_wrk;
144 app_check_thread_and_barrier (session_mq_connect_uri_handler, mp);
146 app = application_lookup (mp->client_index);
150 clib_memset (a, 0, sizeof (*a));
151 a->uri = (char *) mp->uri;
152 a->api_context = mp->context;
153 a->app_index = app->app_index;
154 if ((rv = vnet_connect_uri (a)))
156 clib_warning ("connect_uri returned: %d", rv);
157 app_wrk = application_get_worker (app, 0 /* default wrk only */ );
158 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
164 session_mq_disconnect_handler (void *data)
166 session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
167 vnet_disconnect_args_t _a, *a = &_a;
170 app = application_lookup (mp->client_index);
174 a->app_index = app->app_index;
175 a->handle = mp->handle;
176 vnet_disconnect_session (a);
180 app_mq_detach_handler (void *data)
182 session_app_detach_msg_t *mp = (session_app_detach_msg_t *) data;
183 vnet_app_detach_args_t _a, *a = &_a;
186 app_check_thread_and_barrier (app_mq_detach_handler, mp);
188 app = application_lookup (mp->client_index);
192 a->app_index = app->app_index;
193 a->api_client_index = mp->client_index;
194 vnet_application_detach (a);
198 session_mq_unlisten_handler (void *data)
200 session_unlisten_msg_t *mp = (session_unlisten_msg_t *) data;
201 vnet_unlisten_args_t _a, *a = &_a;
202 app_worker_t *app_wrk;
206 app_check_thread_and_barrier (session_mq_unlisten_handler, mp);
208 app = application_lookup (mp->client_index);
212 clib_memset (a, 0, sizeof (*a));
213 a->app_index = app->app_index;
214 a->handle = mp->handle;
215 a->wrk_map_index = mp->wrk_index;
216 if ((rv = vnet_unlisten (a)))
217 clib_warning ("unlisten returned: %d", rv);
219 app_wrk = application_get_worker (app, a->wrk_map_index);
223 mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
227 session_mq_accepted_reply_handler (void *data)
229 session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
230 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
231 session_state_t old_state;
232 app_worker_t *app_wrk;
235 /* Server isn't interested, kill the session */
238 a->app_index = mp->context;
239 a->handle = mp->handle;
240 vnet_disconnect_session (a);
244 /* Mail this back from the main thread. We're not polling in main
245 * thread so we're using other workers for notifications. */
246 if (vlib_num_workers () && vlib_get_thread_index () != 0
247 && session_thread_from_handle (mp->handle) == 0)
249 vlib_rpc_call_main_thread (session_mq_accepted_reply_handler,
250 (u8 *) mp, sizeof (*mp));
254 s = session_get_from_handle_if_valid (mp->handle);
258 app_wrk = app_worker_get (s->app_wrk_index);
259 if (app_wrk->app_index != mp->context)
261 clib_warning ("app doesn't own session");
265 if (!session_has_transport (s))
267 s->session_state = SESSION_STATE_READY;
268 if (ct_session_connect_notify (s))
273 old_state = s->session_state;
274 s->session_state = SESSION_STATE_READY;
276 if (!svm_fifo_is_empty_prod (s->rx_fifo))
277 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
279 /* Closed while waiting for app to reply. Resend disconnect */
280 if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
282 app_worker_close_notify (app_wrk, s);
283 s->session_state = old_state;
290 session_mq_reset_reply_handler (void *data)
292 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
293 session_reset_reply_msg_t *mp;
294 app_worker_t *app_wrk;
297 u32 index, thread_index;
299 mp = (session_reset_reply_msg_t *) data;
300 app = application_lookup (mp->context);
304 session_parse_handle (mp->handle, &index, &thread_index);
305 s = session_get_if_valid (index, thread_index);
307 /* Session was already closed or already cleaned up */
308 if (!s || s->session_state != SESSION_STATE_TRANSPORT_CLOSING)
311 app_wrk = app_worker_get (s->app_wrk_index);
312 if (!app_wrk || app_wrk->app_index != app->app_index)
314 clib_warning ("App % does not own handle 0x%lx!", app->app_index,
319 /* Client objected to resetting the session, log and continue */
322 clib_warning ("client retval %d", mp->retval);
326 /* This comes as a response to a reset, transport only waiting for
327 * confirmation to remove connection state, no need to disconnect */
328 a->handle = mp->handle;
329 a->app_index = app->app_index;
330 vnet_disconnect_session (a);
334 session_mq_disconnected_handler (void *data)
336 session_disconnected_reply_msg_t *rmp;
337 vnet_disconnect_args_t _a, *a = &_a;
338 svm_msg_q_msg_t _msg, *msg = &_msg;
339 session_disconnected_msg_t *mp;
340 app_worker_t *app_wrk;
341 session_event_t *evt;
346 mp = (session_disconnected_msg_t *) data;
347 if (!(s = session_get_from_handle_if_valid (mp->handle)))
349 clib_warning ("could not disconnect handle %llu", mp->handle);
352 app_wrk = app_worker_get (s->app_wrk_index);
353 app = application_lookup (mp->client_index);
354 if (!(app_wrk && app && app->app_index == app_wrk->app_index))
356 clib_warning ("could not disconnect session: %llu app: %u",
357 mp->handle, mp->client_index);
361 a->handle = mp->handle;
362 a->app_index = app_wrk->wrk_index;
363 rv = vnet_disconnect_session (a);
365 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
366 SESSION_MQ_CTRL_EVT_RING,
368 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
369 clib_memset (evt, 0, sizeof (*evt));
370 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
371 rmp = (session_disconnected_reply_msg_t *) evt->data;
372 rmp->handle = mp->handle;
373 rmp->context = mp->context;
375 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
379 session_mq_disconnected_reply_handler (void *data)
381 session_disconnected_reply_msg_t *mp;
382 vnet_disconnect_args_t _a, *a = &_a;
385 mp = (session_disconnected_reply_msg_t *) data;
387 /* Client objected to disconnecting the session, log and continue */
390 clib_warning ("client retval %d", mp->retval);
394 /* Disconnect has been confirmed. Confirm close to transport */
395 app = application_lookup (mp->context);
398 a->handle = mp->handle;
399 a->app_index = app->app_index;
400 vnet_disconnect_session (a);
405 session_mq_worker_update_handler (void *data)
407 session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
408 session_worker_update_reply_msg_t *rmp;
409 svm_msg_q_msg_t _msg, *msg = &_msg;
410 app_worker_t *app_wrk;
411 u32 owner_app_wrk_map;
412 session_event_t *evt;
416 app = application_lookup (mp->client_index);
419 if (!(s = session_get_from_handle_if_valid (mp->handle)))
421 clib_warning ("invalid handle %llu", mp->handle);
424 app_wrk = app_worker_get (s->app_wrk_index);
425 if (app_wrk->app_index != app->app_index)
427 clib_warning ("app %u does not own session %llu", app->app_index,
431 owner_app_wrk_map = app_wrk->wrk_map_index;
432 app_wrk = application_get_worker (app, mp->wrk_index);
434 /* This needs to come from the new owner */
435 if (mp->req_wrk_index == owner_app_wrk_map)
437 session_req_worker_update_msg_t *wump;
439 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
440 SESSION_MQ_CTRL_EVT_RING,
442 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
443 clib_memset (evt, 0, sizeof (*evt));
444 evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
445 wump = (session_req_worker_update_msg_t *) evt->data;
446 wump->session_handle = mp->handle;
447 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
451 app_worker_own_session (app_wrk, s);
456 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
457 SESSION_MQ_CTRL_EVT_RING,
459 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
460 clib_memset (evt, 0, sizeof (*evt));
461 evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
462 rmp = (session_worker_update_reply_msg_t *) evt->data;
463 rmp->handle = mp->handle;
464 rmp->rx_fifo = pointer_to_uword (s->rx_fifo);
465 rmp->tx_fifo = pointer_to_uword (s->tx_fifo);
466 rmp->segment_handle = session_segment_handle (s);
467 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
470 * Retransmit messages that may have been lost
472 if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
473 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
475 if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
476 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
478 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
479 app_worker_close_notify (app_wrk, s);
482 vlib_node_registration_t session_queue_node;
487 u32 server_thread_index;
488 } session_queue_trace_t;
490 /* packet trace format function */
492 format_session_queue_trace (u8 * s, va_list * args)
494 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
495 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
496 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
498 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
499 t->session_index, t->server_thread_index);
503 #define foreach_session_queue_error \
504 _(TX, "Packets transmitted") \
505 _(TIMER, "Timer events") \
506 _(NO_BUFFER, "Out of buffers")
510 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
511 foreach_session_queue_error
513 SESSION_QUEUE_N_ERROR,
514 } session_queue_error_t;
516 static char *session_queue_error_strings[] = {
517 #define _(sym,string) string,
518 foreach_session_queue_error
524 SESSION_TX_NO_BUFFERS = -2,
530 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
531 u32 next_index, u32 * to_next, u16 n_segs,
532 session_t * s, u32 n_trace)
534 session_queue_trace_t *t;
538 for (i = 0; i < clib_min (n_trace, n_segs); i++)
540 b = vlib_get_buffer (vm, to_next[i - n_segs]);
541 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
542 t = vlib_add_trace (vm, node, b, sizeof (*t));
543 t->session_index = s->session_index;
544 t->server_thread_index = s->thread_index;
546 vlib_set_trace_count (vm, node, n_trace - i);
550 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
551 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
553 vlib_buffer_t *chain_b, *prev_b;
554 u32 chain_bi0, to_deq, left_from_seg;
555 session_worker_t *wrk;
556 u16 len_to_deq, n_bytes_read;
559 wrk = session_main_get_worker (ctx->s->thread_index);
560 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
561 b->total_length_not_including_first_buffer = 0;
564 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
566 to_deq = left_from_seg;
567 for (j = 1; j < ctx->n_bufs_per_seg; j++)
570 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
573 chain_bi0 = wrk->tx_buffers[*n_bufs];
574 chain_b = vlib_get_buffer (vm, chain_bi0);
575 chain_b->current_data = 0;
576 data = vlib_buffer_get_current (chain_b);
579 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
580 ctx->tx_offset, len_to_deq, data);
581 ctx->tx_offset += n_bytes_read;
585 if (ctx->transport_vft->transport_options.tx_type ==
588 svm_fifo_t *f = ctx->s->tx_fifo;
589 session_dgram_hdr_t *hdr = &ctx->hdr;
591 deq_now = clib_min (hdr->data_length - hdr->data_offset,
593 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
595 ASSERT (n_bytes_read > 0);
597 hdr->data_offset += n_bytes_read;
598 if (hdr->data_offset == hdr->data_length)
600 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
601 svm_fifo_dequeue_drop (f, offset);
605 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
608 ASSERT (n_bytes_read == len_to_deq);
609 chain_b->current_length = n_bytes_read;
610 b->total_length_not_including_first_buffer += chain_b->current_length;
612 /* update previous buffer */
613 prev_b->next_buffer = chain_bi0;
614 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
616 /* update current buffer */
617 chain_b->next_buffer = 0;
619 to_deq -= n_bytes_read;
624 && b->total_length_not_including_first_buffer == left_from_seg);
625 ctx->left_to_snd -= left_from_seg;
629 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
630 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
637 * Start with the first buffer in chain
640 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
643 data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
644 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
648 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->tx_offset,
650 ASSERT (n_bytes_read > 0);
651 /* Keep track of progress locally, transport is also supposed to
652 * increment it independently when pushing the header */
653 ctx->tx_offset += n_bytes_read;
657 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
659 session_dgram_hdr_t *hdr = &ctx->hdr;
660 svm_fifo_t *f = ctx->s->tx_fifo;
664 ASSERT (hdr->data_length > hdr->data_offset);
665 deq_now = clib_min (hdr->data_length - hdr->data_offset,
667 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
668 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
669 ASSERT (n_bytes_read > 0);
671 if (ctx->s->session_state == SESSION_STATE_LISTENING)
673 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
674 ctx->tc->rmt_port = hdr->rmt_port;
676 hdr->data_offset += n_bytes_read;
677 if (hdr->data_offset == hdr->data_length)
679 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
680 svm_fifo_dequeue_drop (f, offset);
685 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
687 ASSERT (n_bytes_read > 0);
690 b->current_length = n_bytes_read;
691 ctx->left_to_snd -= n_bytes_read;
694 * Fill in the remaining buffers in the chain, if any
696 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
697 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
701 session_tx_not_ready (session_t * s, u8 peek_data)
705 if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
707 /* Can retransmit for closed sessions but can't send new data if
708 * session is not ready or closed */
709 else if (s->session_state < SESSION_STATE_READY)
711 else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
713 /* Allow closed transports to still send custom packets.
714 * For instance, tcp may want to send acks in time-wait. */
715 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
716 && (s->flags & SESSION_F_CUSTOM_TX))
724 always_inline transport_connection_t *
725 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
729 return ctx->transport_vft->get_connection (ctx->s->connection_index,
730 ctx->s->thread_index);
734 if (ctx->s->session_state == SESSION_STATE_LISTENING)
735 return ctx->transport_vft->get_listener (ctx->s->connection_index);
738 return ctx->transport_vft->get_connection (ctx->s->connection_index,
739 ctx->s->thread_index);
745 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
746 u32 max_segs, u8 peek_data)
748 u32 n_bytes_per_buf, n_bytes_per_seg;
749 ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
752 /* Offset in rx fifo from where to peek data */
753 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
754 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
756 ctx->max_len_to_snd = 0;
759 ctx->max_dequeue -= ctx->tx_offset;
763 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
765 if (ctx->max_dequeue <= sizeof (ctx->hdr))
767 ctx->max_len_to_snd = 0;
770 svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
772 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
773 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
776 ASSERT (ctx->max_dequeue > 0);
778 /* Ensure we're not writing more than transport window allows */
779 if (ctx->max_dequeue < ctx->snd_space)
781 /* Constrained by tx queue. Try to send only fully formed segments */
782 ctx->max_len_to_snd =
783 (ctx->max_dequeue > ctx->snd_mss) ?
784 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
789 /* Expectation is that snd_space0 is already a multiple of snd_mss */
790 ctx->max_len_to_snd = ctx->snd_space;
793 /* Check if we're tx constrained by the node */
794 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
795 if (ctx->n_segs_per_evt > max_segs)
797 ctx->n_segs_per_evt = max_segs;
798 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
801 n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
802 ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
803 n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->snd_mss;
804 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
805 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
806 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
808 TRANSPORT_MAX_HDRS_LEN);
812 session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
813 vlib_node_runtime_t * node,
814 session_evt_elt_t * elt,
815 int *n_tx_packets, u8 peek_data)
817 u32 next_index, next0, next1, *to_next, n_left_to_next, max_burst;
818 u32 n_trace, n_bufs_needed = 0, n_left, pbi;
819 session_tx_context_t *ctx = &wrk->ctx;
820 session_main_t *smm = &session_main;
821 session_event_t *e = &elt->evt;
822 vlib_main_t *vm = wrk->vm;
823 transport_proto_t tp;
827 if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
830 session_evt_add_old (wrk, elt);
831 return SESSION_TX_NO_DATA;
834 next_index = smm->session_type_to_next[ctx->s->session_type];
835 next0 = next1 = next_index;
836 max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
838 tp = session_get_transport_proto (ctx->s);
839 ctx->transport_vft = transport_protocol_get_vft (tp);
840 ctx->tc = session_tx_get_transport (ctx, peek_data);
842 if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
844 if (ctx->transport_vft->flush_data)
845 ctx->transport_vft->flush_data (ctx->tc);
848 if (ctx->s->flags & SESSION_F_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;
855 (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
856 return SESSION_TX_OK;
857 max_burst -= n_custom_tx;
860 session_evt_add_old (wrk, elt);
861 return SESSION_TX_OK;
865 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
866 ctx->snd_space = transport_connection_snd_space (ctx->tc,
871 if (ctx->snd_space == 0 || ctx->snd_mss == 0)
873 session_evt_add_old (wrk, elt);
874 return SESSION_TX_NO_DATA;
877 /* Allow enqueuing of a new event */
878 svm_fifo_unset_event (ctx->s->tx_fifo);
880 /* Check how much we can pull. */
881 session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
883 if (PREDICT_FALSE (!ctx->max_len_to_snd))
884 return SESSION_TX_NO_DATA;
886 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
887 vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
888 CLIB_CACHE_LINE_BYTES);
889 n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
890 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
893 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
894 session_evt_add_old (wrk, elt);
895 vlib_node_increment_counter (wrk->vm, node->node_index,
896 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
897 return SESSION_TX_NO_BUFFERS;
901 * Write until we fill up a frame
903 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
904 if (PREDICT_FALSE (ctx->n_segs_per_evt > n_left_to_next))
906 ctx->n_segs_per_evt = n_left_to_next;
907 ctx->max_len_to_snd = ctx->snd_mss * n_left_to_next;
909 ctx->left_to_snd = ctx->max_len_to_snd;
910 n_left = ctx->n_segs_per_evt;
914 vlib_buffer_t *b0, *b1;
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);
924 to_next[0] = bi0 = wrk->tx_buffers[--n_bufs];
925 to_next[1] = bi1 = wrk->tx_buffers[--n_bufs];
927 b0 = vlib_get_buffer (vm, bi0);
928 b1 = vlib_get_buffer (vm, bi1);
930 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
931 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
933 ctx->transport_vft->push_header (ctx->tc, b0);
934 ctx->transport_vft->push_header (ctx->tc, b1);
940 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
941 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
943 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
944 n_left_to_next, bi0, bi1, next0,
954 pbi = wrk->tx_buffers[n_bufs - 2];
955 pb = vlib_get_buffer (vm, pbi);
956 vlib_prefetch_buffer_header (pb, STORE);
959 to_next[0] = bi0 = wrk->tx_buffers[--n_bufs];
960 b0 = vlib_get_buffer (vm, bi0);
961 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
963 /* Ask transport to push header after current_length and
964 * total_length_not_including_first_buffer are updated */
965 ctx->transport_vft->push_header (ctx->tc, b0);
971 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
973 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
974 n_left_to_next, bi0, next0);
977 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
978 session_tx_trace_frame (vm, node, next_index, to_next,
979 ctx->n_segs_per_evt, ctx->s, n_trace);
981 if (PREDICT_FALSE (n_bufs))
982 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
984 *n_tx_packets += ctx->n_segs_per_evt;
985 transport_connection_update_tx_bytes (ctx->tc, ctx->max_len_to_snd);
986 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
988 SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
989 ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
991 /* If we couldn't dequeue all bytes mark as partially read */
992 ASSERT (ctx->left_to_snd == 0);
993 if (ctx->max_len_to_snd < ctx->max_dequeue)
994 if (svm_fifo_set_event (ctx->s->tx_fifo))
995 session_evt_add_old (wrk, elt);
998 && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
1000 /* Fix dgram pre header */
1001 if (ctx->max_len_to_snd < ctx->max_dequeue)
1002 svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
1003 sizeof (session_dgram_pre_hdr_t));
1004 /* More data needs to be read */
1005 else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
1006 if (svm_fifo_set_event (ctx->s->tx_fifo))
1007 session_evt_add_old (wrk, elt);
1009 if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1010 session_dequeue_notify (ctx->s);
1012 return SESSION_TX_OK;
1016 session_tx_fifo_peek_and_snd (session_worker_t * wrk,
1017 vlib_node_runtime_t * node,
1018 session_evt_elt_t * e, int *n_tx_packets)
1020 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1024 session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
1025 vlib_node_runtime_t * node,
1026 session_evt_elt_t * e, int *n_tx_packets)
1028 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1032 session_tx_fifo_dequeue_internal (session_worker_t * wrk,
1033 vlib_node_runtime_t * node,
1034 session_evt_elt_t * e, int *n_tx_packets)
1036 session_t *s = wrk->ctx.s;
1038 if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1040 svm_fifo_unset_event (s->tx_fifo);
1041 return transport_custom_tx (session_get_transport_proto (s), s,
1042 VLIB_FRAME_SIZE - *n_tx_packets);
1045 always_inline session_t *
1046 session_event_get_session (session_event_t * e, u8 thread_index)
1048 return session_get_if_valid (e->session_index, thread_index);
1052 session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
1054 clib_llist_index_t ei;
1055 void (*fp) (void *);
1059 ei = clib_llist_entry_index (wrk->event_elts, elt);
1062 switch (e->event_type)
1064 case SESSION_CTRL_EVT_RPC:
1065 fp = e->rpc_args.fp;
1066 (*fp) (e->rpc_args.arg);
1068 case SESSION_CTRL_EVT_CLOSE:
1069 s = session_get_from_handle_if_valid (e->session_handle);
1070 if (PREDICT_FALSE (!s))
1072 session_transport_close (s);
1074 case SESSION_CTRL_EVT_RESET:
1075 s = session_get_from_handle_if_valid (e->session_handle);
1076 if (PREDICT_FALSE (!s))
1078 session_transport_reset (s);
1080 case SESSION_CTRL_EVT_LISTEN:
1081 session_mq_listen_handler (session_evt_ctrl_data (wrk, elt));
1083 case SESSION_CTRL_EVT_LISTEN_URI:
1084 session_mq_listen_uri_handler (session_evt_ctrl_data (wrk, elt));
1086 case SESSION_CTRL_EVT_UNLISTEN:
1087 session_mq_unlisten_handler (session_evt_ctrl_data (wrk, elt));
1089 case SESSION_CTRL_EVT_CONNECT:
1090 session_mq_connect_handler (session_evt_ctrl_data (wrk, elt));
1092 case SESSION_CTRL_EVT_CONNECT_URI:
1093 session_mq_connect_uri_handler (session_evt_ctrl_data (wrk, elt));
1095 case SESSION_CTRL_EVT_DISCONNECT:
1096 session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
1098 case SESSION_CTRL_EVT_DISCONNECTED:
1099 session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
1101 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
1102 session_mq_accepted_reply_handler (session_evt_ctrl_data (wrk, elt));
1104 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
1105 session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
1108 case SESSION_CTRL_EVT_RESET_REPLY:
1109 session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
1111 case SESSION_CTRL_EVT_WORKER_UPDATE:
1112 session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
1114 case SESSION_CTRL_EVT_APP_DETACH:
1115 app_mq_detach_handler (session_evt_ctrl_data (wrk, elt));
1118 clib_warning ("unhandled event type %d", e->event_type);
1121 /* Regrab elements in case pool moved */
1122 elt = pool_elt_at_index (wrk->event_elts, ei);
1123 if (!clib_llist_elt_is_linked (elt, evt_list))
1125 if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1126 session_evt_ctrl_data_free (wrk, elt);
1127 session_evt_elt_free (wrk, elt);
1132 session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
1133 session_evt_elt_t * elt, u32 thread_index,
1136 session_main_t *smm = &session_main;
1137 app_worker_t *app_wrk;
1138 clib_llist_index_t ei;
1142 ei = clib_llist_entry_index (wrk->event_elts, elt);
1145 switch (e->event_type)
1147 case SESSION_IO_EVT_TX_FLUSH:
1148 case SESSION_IO_EVT_TX:
1149 s = session_event_get_session (e, thread_index);
1150 if (PREDICT_FALSE (!s))
1152 clib_warning ("session %u was freed!", e->session_index);
1155 CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
1157 /* Spray packets in per session type frames, since they go to
1158 * different nodes */
1159 (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1161 case SESSION_IO_EVT_RX:
1162 s = session_event_get_session (e, thread_index);
1165 transport_app_rx_evt (session_get_transport_proto (s),
1166 s->connection_index, s->thread_index);
1168 case SESSION_IO_EVT_BUILTIN_RX:
1169 s = session_event_get_session (e, thread_index);
1170 if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1172 svm_fifo_unset_event (s->rx_fifo);
1173 app_wrk = app_worker_get (s->app_wrk_index);
1174 app_worker_builtin_rx (app_wrk, s);
1176 case SESSION_IO_EVT_BUILTIN_TX:
1177 s = session_get_from_handle_if_valid (e->session_handle);
1179 if (PREDICT_TRUE (s != 0))
1180 session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1183 clib_warning ("unhandled event type %d", e->event_type);
1186 /* Regrab elements in case pool moved */
1187 elt = pool_elt_at_index (wrk->event_elts, ei);
1188 if (!clib_llist_elt_is_linked (elt, evt_list))
1189 session_evt_elt_free (wrk, elt);
1193 static const u32 session_evt_msg_sizes[] = {
1194 #define _(symc, sym) \
1195 [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1196 foreach_session_ctrl_evt
1202 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1204 session_evt_elt_t *elt;
1206 if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1208 elt = session_evt_alloc_ctrl (wrk);
1209 if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1211 elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1212 elt->evt.event_type = evt->event_type;
1213 clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1214 session_evt_msg_sizes[evt->event_type]);
1218 /* Internal control events fit into io events footprint */
1219 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1224 elt = session_evt_alloc_new (wrk);
1225 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1230 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1231 vlib_frame_t * frame)
1233 session_main_t *smm = vnet_get_session_main ();
1234 u32 thread_index = vm->thread_index, n_to_dequeue;
1235 session_worker_t *wrk = &smm->wrk[thread_index];
1236 session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1237 svm_msg_q_msg_t _msg, *msg = &_msg;
1238 clib_llist_index_t old_ti;
1239 int i, n_tx_packets = 0;
1240 session_event_t *evt;
1243 SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1245 wrk->last_vlib_time = vlib_time_now (vm);
1248 * Update transport time
1250 transport_update_time (wrk->last_vlib_time, thread_index);
1253 * Dequeue and handle new events
1256 /* Try to dequeue what is available. Don't wait for lock.
1257 * XXX: we may need priorities here */
1258 mq = wrk->vpp_event_queue;
1259 n_to_dequeue = svm_msg_q_size (mq);
1260 if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
1262 for (i = 0; i < n_to_dequeue; i++)
1264 svm_msg_q_sub_w_lock (mq, msg);
1265 evt = svm_msg_q_msg_data (mq, msg);
1266 session_evt_add_to_list (wrk, evt);
1267 svm_msg_q_free_msg (mq, msg);
1269 svm_msg_q_unlock (mq);
1273 * Handle control events
1276 ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
1279 clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
1280 clib_llist_remove (wrk->event_elts, evt_list, elt);
1281 session_event_dispatch_ctrl (wrk, elt);
1286 * Handle the new io events.
1289 new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
1292 clib_llist_foreach_safe (wrk->event_elts, evt_list, new_he, elt, ({
1293 session_evt_type_t et;
1295 et = elt->evt.event_type;
1296 clib_llist_remove (wrk->event_elts, evt_list, elt);
1298 /* Postpone tx events if we can't handle them this dispatch cycle */
1299 if (n_tx_packets >= VLIB_FRAME_SIZE
1300 && (et == SESSION_IO_EVT_TX || et == SESSION_IO_EVT_TX_FLUSH))
1302 clib_llist_add (wrk->event_elts, evt_list, elt, new_he);
1306 session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1311 * Handle the old io events
1314 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1315 old_ti = clib_llist_prev_index (old_he, evt_list);
1317 while (!clib_llist_is_empty (wrk->event_elts, evt_list, old_he))
1319 clib_llist_index_t ei;
1321 clib_llist_pop_first (wrk->event_elts, evt_list, elt, old_he);
1322 ei = clib_llist_entry_index (wrk->event_elts, elt);
1323 session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1325 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1326 if (n_tx_packets >= VLIB_FRAME_SIZE || ei == old_ti)
1330 vlib_node_increment_counter (vm, session_queue_node.index,
1331 SESSION_QUEUE_ERROR_TX, n_tx_packets);
1333 SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1335 return n_tx_packets;
1339 VLIB_REGISTER_NODE (session_queue_node) =
1341 .function = session_queue_node_fn,
1342 .name = "session-queue",
1343 .format_trace = format_session_queue_trace,
1344 .type = VLIB_NODE_TYPE_INPUT,
1345 .n_errors = ARRAY_LEN (session_queue_error_strings),
1346 .error_strings = session_queue_error_strings,
1347 .state = VLIB_NODE_STATE_DISABLED,
1352 dump_thread_0_event_queue (void)
1354 session_main_t *smm = vnet_get_session_main ();
1355 vlib_main_t *vm = &vlib_global_main;
1356 u32 my_thread_index = vm->thread_index;
1357 session_event_t _e, *e = &_e;
1358 svm_msg_q_ring_t *ring;
1360 svm_msg_q_msg_t *msg;
1364 mq = smm->wrk[my_thread_index].vpp_event_queue;
1365 index = mq->q->head;
1367 for (i = 0; i < mq->q->cursize; i++)
1369 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1370 ring = svm_msg_q_ring (mq, msg->ring_index);
1371 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1373 switch (e->event_type)
1375 case SESSION_IO_EVT_TX:
1376 s0 = session_event_get_session (e, my_thread_index);
1377 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
1380 case SESSION_CTRL_EVT_CLOSE:
1381 s0 = session_get_from_handle (e->session_handle);
1382 fformat (stdout, "[%04d] disconnect session %d\n", i,
1386 case SESSION_IO_EVT_BUILTIN_RX:
1387 s0 = session_event_get_session (e, my_thread_index);
1388 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
1391 case SESSION_CTRL_EVT_RPC:
1392 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1393 i, (u64) (uword) (e->rpc_args.fp),
1394 (u64) (uword) (e->rpc_args.arg));
1398 fformat (stdout, "[%04d] unhandled event type %d\n",
1405 if (index == mq->q->maxsize)
1411 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1414 switch (e->event_type)
1416 case SESSION_IO_EVT_RX:
1417 case SESSION_IO_EVT_TX:
1418 case SESSION_IO_EVT_BUILTIN_RX:
1419 if (e->session_index == f->master_session_index)
1422 case SESSION_CTRL_EVT_CLOSE:
1424 case SESSION_CTRL_EVT_RPC:
1425 s = session_get_from_handle (e->session_handle);
1428 clib_warning ("session has event but doesn't exist!");
1431 if (s->rx_fifo == f || s->tx_fifo == f)
1441 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1443 session_evt_elt_t *elt;
1444 session_worker_t *wrk;
1445 int i, index, found = 0;
1446 svm_msg_q_msg_t *msg;
1447 svm_msg_q_ring_t *ring;
1452 thread_index = f->master_thread_index;
1453 wrk = session_main_get_worker (thread_index);
1458 mq = wrk->vpp_event_queue;
1459 index = mq->q->head;
1460 for (i = 0; i < mq->q->cursize; i++)
1462 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1463 ring = svm_msg_q_ring (mq, msg->ring_index);
1464 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1465 found = session_node_cmp_event (e, f);
1468 if (++index == mq->q->maxsize)
1472 * Search pending events vector
1476 clib_llist_foreach (wrk->event_elts, evt_list,
1477 pool_elt_at_index (wrk->event_elts, wrk->old_head),
1479 found = session_node_cmp_event (&elt->evt, f);
1482 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1492 static clib_error_t *
1493 session_queue_exit (vlib_main_t * vm)
1495 if (vec_len (vlib_mains) < 2)
1499 * Shut off (especially) worker-thread session nodes.
1500 * Otherwise, vpp can crash as the main thread unmaps the
1503 vlib_worker_thread_barrier_sync (vm);
1504 session_node_enable_disable (0 /* is_enable */ );
1505 vlib_worker_thread_barrier_release (vm);
1509 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1512 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1515 f64 now, timeout = 1.0;
1516 uword *event_data = 0;
1521 vlib_process_wait_for_event_or_clock (vm, timeout);
1522 now = vlib_time_now (vm);
1523 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1527 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1528 /* Flush the frames by updating all transports times */
1529 transport_update_time (now, 0);
1531 case SESSION_Q_PROCESS_STOP:
1535 /* Timed out. Update time for all transports to trigger all
1536 * outstanding retransmits. */
1537 transport_update_time (now, 0);
1540 vec_reset_length (event_data);
1546 VLIB_REGISTER_NODE (session_queue_process_node) =
1548 .function = session_queue_process,
1549 .type = VLIB_NODE_TYPE_PROCESS,
1550 .name = "session-queue-process",
1551 .state = VLIB_NODE_STATE_DISABLED,
1555 static_always_inline uword
1556 session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1557 vlib_frame_t * frame)
1559 session_main_t *sm = &session_main;
1560 if (!sm->wrk[0].vpp_event_queue)
1562 return session_queue_node_fn (vm, node, frame);
1566 VLIB_REGISTER_NODE (session_queue_pre_input_node) =
1568 .function = session_queue_pre_input_inline,
1569 .type = VLIB_NODE_TYPE_PRE_INPUT,
1570 .name = "session-queue-main",
1571 .state = VLIB_NODE_STATE_DISABLED,
1576 * fd.io coding-style-patch-verification: ON
1579 * eval: (c-set-style "gnu")