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->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;
62 if ((rv = vnet_listen (a)))
63 clib_warning ("listen returned: %d", rv);
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);
71 session_mq_listen_uri_handler (void *data)
73 session_listen_uri_msg_t *mp = (session_listen_uri_msg_t *) data;
74 vnet_listen_args_t _a, *a = &_a;
75 app_worker_t *app_wrk;
79 app_check_thread_and_barrier (session_mq_listen_uri_handler, mp);
81 app = application_lookup (mp->client_index);
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);
90 app_wrk = application_get_worker (app, 0);
91 mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
95 session_mq_connect_handler (void *data)
97 session_connect_msg_t *mp = (session_connect_msg_t *) data;
98 vnet_connect_args_t _a, *a = &_a;
99 app_worker_t *app_wrk;
103 app_check_thread_and_barrier (session_mq_connect_handler, mp);
105 app = application_lookup (mp->client_index);
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)
123 vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
124 clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
126 a->api_context = mp->context;
127 a->app_index = app->app_index;
128 a->wrk_map_index = mp->wrk_index;
130 if ((rv = vnet_connect (a)))
132 clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
133 app_wrk = application_get_worker (app, mp->wrk_index);
134 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
138 vec_free (a->sep_ext.hostname);
142 session_mq_connect_uri_handler (void *data)
144 session_connect_uri_msg_t *mp = (session_connect_uri_msg_t *) data;
145 vnet_connect_args_t _a, *a = &_a;
146 app_worker_t *app_wrk;
150 app_check_thread_and_barrier (session_mq_connect_uri_handler, mp);
152 app = application_lookup (mp->client_index);
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)))
162 clib_warning ("connect_uri returned: %d", rv);
163 app_wrk = application_get_worker (app, 0 /* default wrk only */ );
164 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
170 session_mq_disconnect_handler (void *data)
172 session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
173 vnet_disconnect_args_t _a, *a = &_a;
176 app = application_lookup (mp->client_index);
180 a->app_index = app->app_index;
181 a->handle = mp->handle;
182 vnet_disconnect_session (a);
186 app_mq_detach_handler (void *data)
188 session_app_detach_msg_t *mp = (session_app_detach_msg_t *) data;
189 vnet_app_detach_args_t _a, *a = &_a;
192 app_check_thread_and_barrier (app_mq_detach_handler, mp);
194 app = application_lookup (mp->client_index);
198 a->app_index = app->app_index;
199 a->api_client_index = mp->client_index;
200 vnet_application_detach (a);
204 session_mq_unlisten_handler (void *data)
206 session_unlisten_msg_t *mp = (session_unlisten_msg_t *) data;
207 vnet_unlisten_args_t _a, *a = &_a;
208 app_worker_t *app_wrk;
212 app_check_thread_and_barrier (session_mq_unlisten_handler, mp);
214 app = application_lookup (mp->client_index);
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);
225 app_wrk = application_get_worker (app, a->wrk_map_index);
229 mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
233 session_mq_accepted_reply_handler (void *data)
235 session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
236 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
237 session_state_t old_state;
238 app_worker_t *app_wrk;
241 /* Server isn't interested, kill the session */
244 a->app_index = mp->context;
245 a->handle = mp->handle;
246 vnet_disconnect_session (a);
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)
255 vlib_rpc_call_main_thread (session_mq_accepted_reply_handler,
256 (u8 *) mp, sizeof (*mp));
260 s = session_get_from_handle_if_valid (mp->handle);
264 app_wrk = app_worker_get (s->app_wrk_index);
265 if (app_wrk->app_index != mp->context)
267 clib_warning ("app doesn't own session");
271 if (!session_has_transport (s))
273 s->session_state = SESSION_STATE_READY;
274 if (ct_session_connect_notify (s))
279 old_state = s->session_state;
280 s->session_state = SESSION_STATE_READY;
282 if (!svm_fifo_is_empty_prod (s->rx_fifo))
283 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
285 /* Closed while waiting for app to reply. Resend disconnect */
286 if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
288 app_worker_close_notify (app_wrk, s);
289 s->session_state = old_state;
296 session_mq_reset_reply_handler (void *data)
298 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
299 session_reset_reply_msg_t *mp;
300 app_worker_t *app_wrk;
303 u32 index, thread_index;
305 mp = (session_reset_reply_msg_t *) data;
306 app = application_lookup (mp->context);
310 session_parse_handle (mp->handle, &index, &thread_index);
311 s = session_get_if_valid (index, thread_index);
313 /* No session or not the right session */
314 if (!s || s->session_state < SESSION_STATE_TRANSPORT_CLOSING)
317 app_wrk = app_worker_get (s->app_wrk_index);
318 if (!app_wrk || app_wrk->app_index != app->app_index)
320 clib_warning ("App %u does not own handle 0x%lx!", app->app_index,
325 /* Client objected to resetting the session, log and continue */
328 clib_warning ("client retval %d", mp->retval);
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;
336 vnet_disconnect_session (a);
340 session_mq_disconnected_handler (void *data)
342 session_disconnected_reply_msg_t *rmp;
343 vnet_disconnect_args_t _a, *a = &_a;
344 svm_msg_q_msg_t _msg, *msg = &_msg;
345 session_disconnected_msg_t *mp;
346 app_worker_t *app_wrk;
347 session_event_t *evt;
352 mp = (session_disconnected_msg_t *) data;
353 if (!(s = session_get_from_handle_if_valid (mp->handle)))
355 clib_warning ("could not disconnect handle %llu", mp->handle);
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))
362 clib_warning ("could not disconnect session: %llu app: %u",
363 mp->handle, mp->client_index);
367 a->handle = mp->handle;
368 a->app_index = app_wrk->wrk_index;
369 rv = vnet_disconnect_session (a);
371 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
372 SESSION_MQ_CTRL_EVT_RING,
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;
381 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
385 session_mq_disconnected_reply_handler (void *data)
387 session_disconnected_reply_msg_t *mp;
388 vnet_disconnect_args_t _a, *a = &_a;
391 mp = (session_disconnected_reply_msg_t *) data;
393 /* Client objected to disconnecting the session, log and continue */
396 clib_warning ("client retval %d", mp->retval);
400 /* Disconnect has been confirmed. Confirm close to transport */
401 app = application_lookup (mp->context);
404 a->handle = mp->handle;
405 a->app_index = app->app_index;
406 vnet_disconnect_session (a);
411 session_mq_worker_update_handler (void *data)
413 session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
414 session_worker_update_reply_msg_t *rmp;
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;
422 app = application_lookup (mp->client_index);
425 if (!(s = session_get_from_handle_if_valid (mp->handle)))
427 clib_warning ("invalid handle %llu", mp->handle);
430 app_wrk = app_worker_get (s->app_wrk_index);
431 if (app_wrk->app_index != app->app_index)
433 clib_warning ("app %u does not own session %llu", app->app_index,
437 owner_app_wrk_map = app_wrk->wrk_map_index;
438 app_wrk = application_get_worker (app, mp->wrk_index);
440 /* This needs to come from the new owner */
441 if (mp->req_wrk_index == owner_app_wrk_map)
443 session_req_worker_update_msg_t *wump;
445 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
446 SESSION_MQ_CTRL_EVT_RING,
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);
457 app_worker_own_session (app_wrk, s);
462 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
463 SESSION_MQ_CTRL_EVT_RING,
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);
472 rmp->segment_handle = session_segment_handle (s);
473 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
476 * Retransmit messages that may have been lost
478 if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
479 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
481 if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
482 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
484 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
485 app_worker_close_notify (app_wrk, s);
488 vlib_node_registration_t session_queue_node;
493 u32 server_thread_index;
494 } session_queue_trace_t;
496 /* packet trace format function */
498 format_session_queue_trace (u8 * s, va_list * args)
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 *);
504 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
505 t->session_index, t->server_thread_index);
509 #define foreach_session_queue_error \
510 _(TX, "Packets transmitted") \
511 _(TIMER, "Timer events") \
512 _(NO_BUFFER, "Out of buffers")
516 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
517 foreach_session_queue_error
519 SESSION_QUEUE_N_ERROR,
520 } session_queue_error_t;
522 static char *session_queue_error_strings[] = {
523 #define _(sym,string) string,
524 foreach_session_queue_error
530 SESSION_TX_NO_BUFFERS = -2,
536 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
537 u32 next_index, u32 * to_next, u16 n_segs,
538 session_t * s, u32 n_trace)
540 session_queue_trace_t *t;
544 for (i = 0; i < clib_min (n_trace, n_segs); i++)
546 b = vlib_get_buffer (vm, to_next[i - n_segs]);
547 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
548 t = vlib_add_trace (vm, node, b, sizeof (*t));
549 t->session_index = s->session_index;
550 t->server_thread_index = s->thread_index;
552 vlib_set_trace_count (vm, node, n_trace - i);
556 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
557 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
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;
565 wrk = session_main_get_worker (ctx->s->thread_index);
566 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
567 b->total_length_not_including_first_buffer = 0;
570 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
572 to_deq = left_from_seg;
573 for (j = 1; j < ctx->n_bufs_per_seg; j++)
576 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
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);
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;
591 if (ctx->transport_vft->transport_options.tx_type ==
594 svm_fifo_t *f = ctx->s->tx_fifo;
595 session_dgram_hdr_t *hdr = &ctx->hdr;
597 deq_now = clib_min (hdr->data_length - hdr->data_offset,
599 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
601 ASSERT (n_bytes_read > 0);
603 hdr->data_offset += n_bytes_read;
604 if (hdr->data_offset == hdr->data_length)
606 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
607 svm_fifo_dequeue_drop (f, offset);
611 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
614 ASSERT (n_bytes_read == len_to_deq);
615 chain_b->current_length = n_bytes_read;
616 b->total_length_not_including_first_buffer += chain_b->current_length;
618 /* update previous buffer */
619 prev_b->next_buffer = chain_bi0;
620 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
622 /* update current buffer */
623 chain_b->next_buffer = 0;
625 to_deq -= n_bytes_read;
630 && b->total_length_not_including_first_buffer == left_from_seg);
631 ctx->left_to_snd -= left_from_seg;
635 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
636 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
643 * Start with the first buffer in chain
646 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
649 data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
650 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
654 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->tx_offset,
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;
663 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
665 session_dgram_hdr_t *hdr = &ctx->hdr;
666 svm_fifo_t *f = ctx->s->tx_fifo;
670 ASSERT (hdr->data_length > hdr->data_offset);
671 deq_now = clib_min (hdr->data_length - hdr->data_offset,
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);
677 if (ctx->s->session_state == SESSION_STATE_LISTENING)
679 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
680 ctx->tc->rmt_port = hdr->rmt_port;
682 hdr->data_offset += n_bytes_read;
683 if (hdr->data_offset == hdr->data_length)
685 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
686 svm_fifo_dequeue_drop (f, offset);
691 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
693 ASSERT (n_bytes_read > 0);
696 b->current_length = n_bytes_read;
697 ctx->left_to_snd -= n_bytes_read;
700 * Fill in the remaining buffers in the chain, if any
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);
707 session_tx_not_ready (session_t * s, u8 peek_data)
711 if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
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)
717 else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
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))
730 always_inline transport_connection_t *
731 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
735 return ctx->transport_vft->get_connection (ctx->s->connection_index,
736 ctx->s->thread_index);
740 if (ctx->s->session_state == SESSION_STATE_LISTENING)
741 return ctx->transport_vft->get_listener (ctx->s->connection_index);
744 return ctx->transport_vft->get_connection (ctx->s->connection_index,
745 ctx->s->thread_index);
751 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
752 u32 max_segs, u8 peek_data)
754 u32 n_bytes_per_buf, n_bytes_per_seg;
755 ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
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))
762 ctx->max_len_to_snd = 0;
765 ctx->max_dequeue -= ctx->tx_offset;
769 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
771 if (ctx->max_dequeue <= sizeof (ctx->hdr))
773 ctx->max_len_to_snd = 0;
776 svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
778 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
779 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
782 ASSERT (ctx->max_dequeue > 0);
784 /* Ensure we're not writing more than transport window allows */
785 if (ctx->max_dequeue < ctx->snd_space)
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;
795 /* Expectation is that snd_space0 is already a multiple of snd_mss */
796 ctx->max_len_to_snd = ctx->snd_space;
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)
803 ctx->n_segs_per_evt = max_segs;
804 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
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,
814 TRANSPORT_MAX_HDRS_LEN);
818 session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
819 vlib_node_runtime_t * node,
820 session_evt_elt_t * elt,
821 int *n_tx_packets, u8 peek_data)
823 u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
824 session_tx_context_t *ctx = &wrk->ctx;
825 session_main_t *smm = &session_main;
826 session_event_t *e = &elt->evt;
827 vlib_main_t *vm = wrk->vm;
828 transport_proto_t tp;
832 if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
835 session_evt_add_old (wrk, elt);
836 return SESSION_TX_NO_DATA;
839 next_index = smm->session_type_to_next[ctx->s->session_type];
840 max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
842 tp = session_get_transport_proto (ctx->s);
843 ctx->transport_vft = transport_protocol_get_vft (tp);
844 ctx->tc = session_tx_get_transport (ctx, peek_data);
846 if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
848 if (ctx->transport_vft->flush_data)
849 ctx->transport_vft->flush_data (ctx->tc);
850 e->event_type = SESSION_IO_EVT_TX;
853 if (ctx->s->flags & SESSION_F_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;
860 (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
861 return SESSION_TX_OK;
862 max_burst -= n_custom_tx;
865 session_evt_add_old (wrk, elt);
866 return SESSION_TX_OK;
870 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
871 if (PREDICT_FALSE (ctx->snd_mss == 0))
873 session_evt_add_old (wrk, elt);
874 return SESSION_TX_NO_DATA;
877 ctx->snd_space = transport_connection_snd_space (ctx->tc);
879 /* This flow queue is "empty" so it should be re-evaluated before
880 * the ones that have data to send. */
883 session_evt_add_head_old (wrk, elt);
884 return SESSION_TX_NO_DATA;
887 if (transport_connection_is_tx_paced (ctx->tc))
889 u32 snd_space = transport_connection_tx_pacer_burst (ctx->tc);
890 if (snd_space < TRANSPORT_PACER_MIN_BURST)
892 session_evt_add_head_old (wrk, elt);
893 return SESSION_TX_NO_DATA;
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;
900 /* Allow enqueuing of a new event */
901 svm_fifo_unset_event (ctx->s->tx_fifo);
903 /* Check how much we can pull. */
904 session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
906 if (PREDICT_FALSE (!ctx->max_len_to_snd))
908 transport_connection_tx_pacer_reset_bucket (ctx->tc, 0);
909 return SESSION_TX_NO_DATA;
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,
914 CLIB_CACHE_LINE_BYTES);
915 n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
916 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
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);
922 vlib_node_increment_counter (wrk->vm, node->node_index,
923 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
924 return SESSION_TX_NO_BUFFERS;
927 ctx->left_to_snd = ctx->max_len_to_snd;
928 n_left = ctx->n_segs_per_evt;
932 vlib_buffer_t *b0, *b1;
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);
942 bi0 = wrk->tx_buffers[--n_bufs];
943 bi1 = wrk->tx_buffers[--n_bufs];
945 b0 = vlib_get_buffer (vm, bi0);
946 b1 = vlib_get_buffer (vm, bi1);
948 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
949 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
951 ctx->transport_vft->push_header (ctx->tc, b0);
952 ctx->transport_vft->push_header (ctx->tc, b1);
956 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
957 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
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);
971 pbi = wrk->tx_buffers[n_bufs - 2];
972 pb = vlib_get_buffer (vm, pbi);
973 vlib_prefetch_buffer_header (pb, STORE);
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);
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);
986 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
988 vec_add1 (wrk->pending_tx_buffers, bi0);
989 vec_add1 (wrk->pending_tx_nexts, next_index);
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);
996 if (PREDICT_FALSE (n_bufs))
997 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
999 *n_tx_packets += ctx->n_segs_per_evt;
1000 transport_connection_update_tx_bytes (ctx->tc, ctx->max_len_to_snd);
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);
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);
1012 && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
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);
1023 if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1024 session_dequeue_notify (ctx->s);
1026 return SESSION_TX_OK;
1030 session_tx_fifo_peek_and_snd (session_worker_t * wrk,
1031 vlib_node_runtime_t * node,
1032 session_evt_elt_t * e, int *n_tx_packets)
1034 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1038 session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
1039 vlib_node_runtime_t * node,
1040 session_evt_elt_t * e, int *n_tx_packets)
1042 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1046 session_tx_fifo_dequeue_internal (session_worker_t * wrk,
1047 vlib_node_runtime_t * node,
1048 session_evt_elt_t * e, int *n_tx_packets)
1050 session_t *s = wrk->ctx.s;
1052 if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1054 svm_fifo_unset_event (s->tx_fifo);
1055 return transport_custom_tx (session_get_transport_proto (s), s,
1056 VLIB_FRAME_SIZE - *n_tx_packets);
1059 always_inline session_t *
1060 session_event_get_session (session_event_t * e, u8 thread_index)
1062 return session_get_if_valid (e->session_index, thread_index);
1066 session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
1068 clib_llist_index_t ei;
1069 void (*fp) (void *);
1073 ei = clib_llist_entry_index (wrk->event_elts, elt);
1076 switch (e->event_type)
1078 case SESSION_CTRL_EVT_RPC:
1079 fp = e->rpc_args.fp;
1080 (*fp) (e->rpc_args.arg);
1082 case SESSION_CTRL_EVT_CLOSE:
1083 s = session_get_from_handle_if_valid (e->session_handle);
1084 if (PREDICT_FALSE (!s))
1086 session_transport_close (s);
1088 case SESSION_CTRL_EVT_RESET:
1089 s = session_get_from_handle_if_valid (e->session_handle);
1090 if (PREDICT_FALSE (!s))
1092 session_transport_reset (s);
1094 case SESSION_CTRL_EVT_LISTEN:
1095 session_mq_listen_handler (session_evt_ctrl_data (wrk, elt));
1097 case SESSION_CTRL_EVT_LISTEN_URI:
1098 session_mq_listen_uri_handler (session_evt_ctrl_data (wrk, elt));
1100 case SESSION_CTRL_EVT_UNLISTEN:
1101 session_mq_unlisten_handler (session_evt_ctrl_data (wrk, elt));
1103 case SESSION_CTRL_EVT_CONNECT:
1104 session_mq_connect_handler (session_evt_ctrl_data (wrk, elt));
1106 case SESSION_CTRL_EVT_CONNECT_URI:
1107 session_mq_connect_uri_handler (session_evt_ctrl_data (wrk, elt));
1109 case SESSION_CTRL_EVT_DISCONNECT:
1110 session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
1112 case SESSION_CTRL_EVT_DISCONNECTED:
1113 session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
1115 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
1116 session_mq_accepted_reply_handler (session_evt_ctrl_data (wrk, elt));
1118 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
1119 session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
1122 case SESSION_CTRL_EVT_RESET_REPLY:
1123 session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
1125 case SESSION_CTRL_EVT_WORKER_UPDATE:
1126 session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
1128 case SESSION_CTRL_EVT_APP_DETACH:
1129 app_mq_detach_handler (session_evt_ctrl_data (wrk, elt));
1132 clib_warning ("unhandled event type %d", e->event_type);
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))
1140 if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1141 session_evt_ctrl_data_free (wrk, elt);
1142 session_evt_elt_free (wrk, elt);
1147 session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
1148 session_evt_elt_t * elt, u32 thread_index,
1151 session_main_t *smm = &session_main;
1152 app_worker_t *app_wrk;
1153 clib_llist_index_t ei;
1157 ei = clib_llist_entry_index (wrk->event_elts, elt);
1160 switch (e->event_type)
1162 case SESSION_IO_EVT_TX_FLUSH:
1163 case SESSION_IO_EVT_TX:
1164 s = session_event_get_session (e, thread_index);
1165 if (PREDICT_FALSE (!s))
1167 CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
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);
1173 case SESSION_IO_EVT_RX:
1174 s = session_event_get_session (e, thread_index);
1177 transport_app_rx_evt (session_get_transport_proto (s),
1178 s->connection_index, s->thread_index);
1180 case SESSION_IO_EVT_BUILTIN_RX:
1181 s = session_event_get_session (e, thread_index);
1182 if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1184 svm_fifo_unset_event (s->rx_fifo);
1185 app_wrk = app_worker_get (s->app_wrk_index);
1186 app_worker_builtin_rx (app_wrk, s);
1188 case SESSION_IO_EVT_BUILTIN_TX:
1189 s = session_get_from_handle_if_valid (e->session_handle);
1191 if (PREDICT_TRUE (s != 0))
1192 session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1195 clib_warning ("unhandled event type %d", e->event_type);
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);
1205 static const u32 session_evt_msg_sizes[] = {
1206 #define _(symc, sym) \
1207 [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1208 foreach_session_ctrl_evt
1214 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1216 session_evt_elt_t *elt;
1218 if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1220 elt = session_evt_alloc_ctrl (wrk);
1221 if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
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]);
1230 /* Internal control events fit into io events footprint */
1231 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1236 elt = session_evt_alloc_new (wrk);
1237 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1242 session_flush_pending_tx_buffers (session_worker_t * wrk,
1243 vlib_node_runtime_t * node)
1245 vlib_buffer_enqueue_to_next (wrk->vm, node, wrk->pending_tx_buffers,
1246 wrk->pending_tx_nexts,
1247 vec_len (wrk->pending_tx_nexts));
1248 vec_reset_length (wrk->pending_tx_buffers);
1249 vec_reset_length (wrk->pending_tx_nexts);
1253 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1254 vlib_frame_t * frame)
1256 session_main_t *smm = vnet_get_session_main ();
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;
1266 SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1268 wrk->last_vlib_time = vlib_time_now (vm);
1269 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1272 * Update transport time
1274 transport_update_time (wrk->last_vlib_time, thread_index);
1277 * Dequeue and handle new events
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)
1286 for (i = 0; i < n_to_dequeue; i++)
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);
1293 svm_msg_q_unlock (mq);
1297 * Handle control events
1300 ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
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);
1310 * Handle the new io events.
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);
1318 clib_llist_foreach_safe (wrk->event_elts, evt_list, new_he, elt, ({
1319 session_evt_type_t et;
1321 et = elt->evt.event_type;
1322 clib_llist_remove (wrk->event_elts, evt_list, elt);
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))
1328 clib_llist_add (wrk->event_elts, evt_list, elt, new_he);
1332 session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1337 * Handle the old io events, if we had any prior to processing the new ones
1340 if (old_ti != wrk->old_head)
1342 clib_llist_index_t ei, next_ei;
1344 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1345 ei = clib_llist_next_index (old_he, evt_list);
1347 while (n_tx_packets < VLIB_FRAME_SIZE)
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);
1353 session_event_dispatch_io (wrk, node, elt, thread_index,
1363 if (vec_len (wrk->pending_tx_buffers))
1364 session_flush_pending_tx_buffers (wrk, node);
1366 vlib_node_increment_counter (vm, session_queue_node.index,
1367 SESSION_QUEUE_ERROR_TX, n_tx_packets);
1369 SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1371 return n_tx_packets;
1375 VLIB_REGISTER_NODE (session_queue_node) =
1377 .function = session_queue_node_fn,
1378 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
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,
1389 dump_thread_0_event_queue (void)
1391 session_main_t *smm = vnet_get_session_main ();
1392 vlib_main_t *vm = &vlib_global_main;
1393 u32 my_thread_index = vm->thread_index;
1394 session_event_t _e, *e = &_e;
1395 svm_msg_q_ring_t *ring;
1397 svm_msg_q_msg_t *msg;
1401 mq = smm->wrk[my_thread_index].vpp_event_queue;
1402 index = mq->q->head;
1404 for (i = 0; i < mq->q->cursize; i++)
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);
1410 switch (e->event_type)
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);
1417 case SESSION_CTRL_EVT_CLOSE:
1418 s0 = session_get_from_handle (e->session_handle);
1419 fformat (stdout, "[%04d] disconnect session %d\n", i,
1423 case SESSION_IO_EVT_BUILTIN_RX:
1424 s0 = session_event_get_session (e, my_thread_index);
1425 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
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));
1435 fformat (stdout, "[%04d] unhandled event type %d\n",
1442 if (index == mq->q->maxsize)
1448 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1451 switch (e->event_type)
1453 case SESSION_IO_EVT_RX:
1454 case SESSION_IO_EVT_TX:
1455 case SESSION_IO_EVT_BUILTIN_RX:
1456 case SESSION_IO_EVT_BUILTIN_TX:
1457 case SESSION_IO_EVT_TX_FLUSH:
1458 if (e->session_index == f->master_session_index)
1461 case SESSION_CTRL_EVT_CLOSE:
1463 case SESSION_CTRL_EVT_RPC:
1464 s = session_get_from_handle (e->session_handle);
1467 clib_warning ("session has event but doesn't exist!");
1470 if (s->rx_fifo == f || s->tx_fifo == f)
1480 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
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;
1491 thread_index = f->master_thread_index;
1492 wrk = session_main_get_worker (thread_index);
1497 mq = wrk->vpp_event_queue;
1498 index = mq->q->head;
1499 for (i = 0; i < mq->q->cursize; i++)
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);
1507 index = (index + 1) % mq->q->maxsize;
1510 * Search pending events vector
1514 clib_llist_foreach (wrk->event_elts, evt_list,
1515 pool_elt_at_index (wrk->event_elts, wrk->new_head),
1517 found = session_node_cmp_event (&elt->evt, f);
1520 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1527 clib_llist_foreach (wrk->event_elts, evt_list,
1528 pool_elt_at_index (wrk->event_elts, wrk->old_head),
1530 found = session_node_cmp_event (&elt->evt, f);
1533 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1543 static clib_error_t *
1544 session_queue_exit (vlib_main_t * vm)
1546 if (vec_len (vlib_mains) < 2)
1550 * Shut off (especially) worker-thread session nodes.
1551 * Otherwise, vpp can crash as the main thread unmaps the
1554 vlib_worker_thread_barrier_sync (vm);
1555 session_node_enable_disable (0 /* is_enable */ );
1556 vlib_worker_thread_barrier_release (vm);
1560 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1563 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1566 f64 now, timeout = 1.0;
1567 uword *event_data = 0;
1572 vlib_process_wait_for_event_or_clock (vm, timeout);
1573 now = vlib_time_now (vm);
1574 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1578 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1579 /* Flush the frames by updating all transports times */
1580 transport_update_time (now, 0);
1582 case SESSION_Q_PROCESS_STOP:
1586 /* Timed out. Update time for all transports to trigger all
1587 * outstanding retransmits. */
1588 transport_update_time (now, 0);
1591 vec_reset_length (event_data);
1597 VLIB_REGISTER_NODE (session_queue_process_node) =
1599 .function = session_queue_process,
1600 .type = VLIB_NODE_TYPE_PROCESS,
1601 .name = "session-queue-process",
1602 .state = VLIB_NODE_STATE_DISABLED,
1606 static_always_inline uword
1607 session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1608 vlib_frame_t * frame)
1610 session_main_t *sm = &session_main;
1611 if (!sm->wrk[0].vpp_event_queue)
1613 node = vlib_node_get_runtime (vm, session_queue_node.index);
1614 return session_queue_node_fn (vm, node, frame);
1618 VLIB_REGISTER_NODE (session_queue_pre_input_node) =
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,
1628 * fd.io coding-style-patch-verification: ON
1631 * eval: (c-set-style "gnu")