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 index %d 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]);
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_maybe_reschedule (session_worker_t * wrk,
819 session_tx_context_t * ctx,
820 session_evt_elt_t * elt, u8 is_peek)
822 session_t *s = ctx->s;
824 svm_fifo_unset_event (s->tx_fifo);
825 if (svm_fifo_max_dequeue_cons (s->tx_fifo) > (is_peek ? ctx->tx_offset : 0))
826 if (svm_fifo_set_event (s->tx_fifo))
827 session_evt_add_head_old (wrk, elt);
831 session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
832 vlib_node_runtime_t * node,
833 session_evt_elt_t * elt,
834 int *n_tx_packets, u8 peek_data)
836 u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
837 session_tx_context_t *ctx = &wrk->ctx;
838 session_main_t *smm = &session_main;
839 session_event_t *e = &elt->evt;
840 vlib_main_t *vm = wrk->vm;
841 transport_proto_t tp;
845 if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
848 session_evt_add_old (wrk, elt);
849 return SESSION_TX_NO_DATA;
852 next_index = smm->session_type_to_next[ctx->s->session_type];
853 max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
855 tp = session_get_transport_proto (ctx->s);
856 ctx->transport_vft = transport_protocol_get_vft (tp);
857 ctx->tc = session_tx_get_transport (ctx, peek_data);
859 if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
861 if (ctx->transport_vft->flush_data)
862 ctx->transport_vft->flush_data (ctx->tc);
863 e->event_type = SESSION_IO_EVT_TX;
866 if (ctx->s->flags & SESSION_F_CUSTOM_TX)
869 ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
870 n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, max_burst);
871 *n_tx_packets += n_custom_tx;
873 (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
874 return SESSION_TX_OK;
875 max_burst -= n_custom_tx;
878 session_evt_add_old (wrk, elt);
879 return SESSION_TX_OK;
883 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
884 if (PREDICT_FALSE (ctx->snd_mss == 0))
886 session_evt_add_old (wrk, elt);
887 return SESSION_TX_NO_DATA;
890 ctx->snd_space = transport_connection_snd_space (ctx->tc);
892 /* This flow queue is "empty" so it should be re-evaluated before
893 * the ones that have data to send. */
896 session_evt_add_head_old (wrk, elt);
897 return SESSION_TX_NO_DATA;
900 if (transport_connection_is_tx_paced (ctx->tc))
902 u32 snd_space = transport_connection_tx_pacer_burst (ctx->tc);
903 if (snd_space < TRANSPORT_PACER_MIN_BURST)
905 session_evt_add_head_old (wrk, elt);
906 return SESSION_TX_NO_DATA;
908 snd_space = clib_min (ctx->snd_space, snd_space);
909 ctx->snd_space = snd_space >= ctx->snd_mss ?
910 snd_space - snd_space % ctx->snd_mss : snd_space;
913 /* Check how much we can pull. */
914 session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
916 if (PREDICT_FALSE (!ctx->max_len_to_snd))
918 transport_connection_tx_pacer_reset_bucket (ctx->tc, 0);
919 session_tx_maybe_reschedule (wrk, ctx, elt, peek_data);
920 return SESSION_TX_NO_DATA;
923 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
924 vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
925 CLIB_CACHE_LINE_BYTES);
926 n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
927 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
930 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
931 session_evt_add_head_old (wrk, elt);
932 vlib_node_increment_counter (wrk->vm, node->node_index,
933 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
934 return SESSION_TX_NO_BUFFERS;
937 ctx->left_to_snd = ctx->max_len_to_snd;
938 n_left = ctx->n_segs_per_evt;
942 vlib_buffer_t *b0, *b1;
945 pbi = wrk->tx_buffers[n_bufs - 3];
946 pb = vlib_get_buffer (vm, pbi);
947 vlib_prefetch_buffer_header (pb, STORE);
948 pbi = wrk->tx_buffers[n_bufs - 4];
949 pb = vlib_get_buffer (vm, pbi);
950 vlib_prefetch_buffer_header (pb, STORE);
952 bi0 = wrk->tx_buffers[--n_bufs];
953 bi1 = wrk->tx_buffers[--n_bufs];
955 b0 = vlib_get_buffer (vm, bi0);
956 b1 = vlib_get_buffer (vm, bi1);
958 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
959 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
961 ctx->transport_vft->push_header (ctx->tc, b0);
962 ctx->transport_vft->push_header (ctx->tc, b1);
966 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
967 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
969 vec_add1 (wrk->pending_tx_buffers, bi0);
970 vec_add1 (wrk->pending_tx_buffers, bi1);
971 vec_add1 (wrk->pending_tx_nexts, next_index);
972 vec_add1 (wrk->pending_tx_nexts, next_index);
981 pbi = wrk->tx_buffers[n_bufs - 2];
982 pb = vlib_get_buffer (vm, pbi);
983 vlib_prefetch_buffer_header (pb, STORE);
986 bi0 = wrk->tx_buffers[--n_bufs];
987 b0 = vlib_get_buffer (vm, bi0);
988 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
990 /* Ask transport to push header after current_length and
991 * total_length_not_including_first_buffer are updated */
992 ctx->transport_vft->push_header (ctx->tc, b0);
996 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
998 vec_add1 (wrk->pending_tx_buffers, bi0);
999 vec_add1 (wrk->pending_tx_nexts, next_index);
1002 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
1003 session_tx_trace_frame (vm, node, next_index, wrk->pending_tx_buffers,
1004 ctx->n_segs_per_evt, ctx->s, n_trace);
1006 if (PREDICT_FALSE (n_bufs))
1007 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
1009 *n_tx_packets += ctx->n_segs_per_evt;
1010 transport_connection_update_tx_bytes (ctx->tc, ctx->max_len_to_snd);
1012 SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
1013 ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
1015 ASSERT (ctx->left_to_snd == 0);
1017 /* If we couldn't dequeue all bytes reschedule as old flow. Otherwise,
1018 * check if application enqueued more data and reschedule accordingly */
1019 if (ctx->max_len_to_snd < ctx->max_dequeue)
1020 session_evt_add_old (wrk, elt);
1022 session_tx_maybe_reschedule (wrk, ctx, elt, peek_data);
1025 && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
1027 /* Fix dgram pre header */
1028 if (ctx->max_len_to_snd < ctx->max_dequeue)
1029 svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
1030 sizeof (session_dgram_pre_hdr_t));
1031 /* More data needs to be read */
1032 else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
1033 if (svm_fifo_set_event (ctx->s->tx_fifo))
1034 session_evt_add_old (wrk, elt);
1036 if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1037 session_dequeue_notify (ctx->s);
1039 return SESSION_TX_OK;
1043 session_tx_fifo_peek_and_snd (session_worker_t * wrk,
1044 vlib_node_runtime_t * node,
1045 session_evt_elt_t * e, int *n_tx_packets)
1047 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1051 session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
1052 vlib_node_runtime_t * node,
1053 session_evt_elt_t * e, int *n_tx_packets)
1055 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1059 session_tx_fifo_dequeue_internal (session_worker_t * wrk,
1060 vlib_node_runtime_t * node,
1061 session_evt_elt_t * e, int *n_tx_packets)
1063 session_t *s = wrk->ctx.s;
1065 if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1067 svm_fifo_unset_event (s->tx_fifo);
1068 return transport_custom_tx (session_get_transport_proto (s), s,
1069 VLIB_FRAME_SIZE - *n_tx_packets);
1072 always_inline session_t *
1073 session_event_get_session (session_event_t * e, u8 thread_index)
1075 return session_get_if_valid (e->session_index, thread_index);
1079 session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
1081 clib_llist_index_t ei;
1082 void (*fp) (void *);
1086 ei = clib_llist_entry_index (wrk->event_elts, elt);
1089 switch (e->event_type)
1091 case SESSION_CTRL_EVT_RPC:
1092 fp = e->rpc_args.fp;
1093 (*fp) (e->rpc_args.arg);
1095 case SESSION_CTRL_EVT_CLOSE:
1096 s = session_get_from_handle_if_valid (e->session_handle);
1097 if (PREDICT_FALSE (!s))
1099 session_transport_close (s);
1101 case SESSION_CTRL_EVT_RESET:
1102 s = session_get_from_handle_if_valid (e->session_handle);
1103 if (PREDICT_FALSE (!s))
1105 session_transport_reset (s);
1107 case SESSION_CTRL_EVT_LISTEN:
1108 session_mq_listen_handler (session_evt_ctrl_data (wrk, elt));
1110 case SESSION_CTRL_EVT_LISTEN_URI:
1111 session_mq_listen_uri_handler (session_evt_ctrl_data (wrk, elt));
1113 case SESSION_CTRL_EVT_UNLISTEN:
1114 session_mq_unlisten_handler (session_evt_ctrl_data (wrk, elt));
1116 case SESSION_CTRL_EVT_CONNECT:
1117 session_mq_connect_handler (session_evt_ctrl_data (wrk, elt));
1119 case SESSION_CTRL_EVT_CONNECT_URI:
1120 session_mq_connect_uri_handler (session_evt_ctrl_data (wrk, elt));
1122 case SESSION_CTRL_EVT_DISCONNECT:
1123 session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
1125 case SESSION_CTRL_EVT_DISCONNECTED:
1126 session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
1128 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
1129 session_mq_accepted_reply_handler (session_evt_ctrl_data (wrk, elt));
1131 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
1132 session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
1135 case SESSION_CTRL_EVT_RESET_REPLY:
1136 session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
1138 case SESSION_CTRL_EVT_WORKER_UPDATE:
1139 session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
1141 case SESSION_CTRL_EVT_APP_DETACH:
1142 app_mq_detach_handler (session_evt_ctrl_data (wrk, elt));
1145 clib_warning ("unhandled event type %d", e->event_type);
1148 /* Regrab elements in case pool moved */
1149 elt = pool_elt_at_index (wrk->event_elts, ei);
1150 if (!clib_llist_elt_is_linked (elt, evt_list))
1153 if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1154 session_evt_ctrl_data_free (wrk, elt);
1155 session_evt_elt_free (wrk, elt);
1160 session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
1161 session_evt_elt_t * elt, u32 thread_index,
1164 session_main_t *smm = &session_main;
1165 app_worker_t *app_wrk;
1166 clib_llist_index_t ei;
1170 ei = clib_llist_entry_index (wrk->event_elts, elt);
1173 switch (e->event_type)
1175 case SESSION_IO_EVT_TX_FLUSH:
1176 case SESSION_IO_EVT_TX:
1177 s = session_event_get_session (e, thread_index);
1178 if (PREDICT_FALSE (!s))
1180 CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
1182 /* Spray packets in per session type frames, since they go to
1183 * different nodes */
1184 (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1186 case SESSION_IO_EVT_RX:
1187 s = session_event_get_session (e, thread_index);
1190 transport_app_rx_evt (session_get_transport_proto (s),
1191 s->connection_index, s->thread_index);
1193 case SESSION_IO_EVT_BUILTIN_RX:
1194 s = session_event_get_session (e, thread_index);
1195 if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1197 svm_fifo_unset_event (s->rx_fifo);
1198 app_wrk = app_worker_get (s->app_wrk_index);
1199 app_worker_builtin_rx (app_wrk, s);
1201 case SESSION_IO_EVT_BUILTIN_TX:
1202 s = session_get_from_handle_if_valid (e->session_handle);
1204 if (PREDICT_TRUE (s != 0))
1205 session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1208 clib_warning ("unhandled event type %d", e->event_type);
1211 /* Regrab elements in case pool moved */
1212 elt = pool_elt_at_index (wrk->event_elts, ei);
1213 if (!clib_llist_elt_is_linked (elt, evt_list))
1214 session_evt_elt_free (wrk, elt);
1218 static const u32 session_evt_msg_sizes[] = {
1219 #define _(symc, sym) \
1220 [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1221 foreach_session_ctrl_evt
1227 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1229 session_evt_elt_t *elt;
1231 if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1233 elt = session_evt_alloc_ctrl (wrk);
1234 if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1236 elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1237 elt->evt.event_type = evt->event_type;
1238 clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1239 session_evt_msg_sizes[evt->event_type]);
1243 /* Internal control events fit into io events footprint */
1244 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1249 elt = session_evt_alloc_new (wrk);
1250 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1255 session_flush_pending_tx_buffers (session_worker_t * wrk,
1256 vlib_node_runtime_t * node)
1258 vlib_buffer_enqueue_to_next (wrk->vm, node, wrk->pending_tx_buffers,
1259 wrk->pending_tx_nexts,
1260 vec_len (wrk->pending_tx_nexts));
1261 vec_reset_length (wrk->pending_tx_buffers);
1262 vec_reset_length (wrk->pending_tx_nexts);
1266 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1267 vlib_frame_t * frame)
1269 session_main_t *smm = vnet_get_session_main ();
1270 u32 thread_index = vm->thread_index, n_to_dequeue;
1271 session_worker_t *wrk = &smm->wrk[thread_index];
1272 session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1273 clib_llist_index_t ei, next_ei, old_ti;
1274 svm_msg_q_msg_t _msg, *msg = &_msg;
1275 int i, n_tx_packets;
1276 session_event_t *evt;
1279 SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1281 wrk->last_vlib_time = vlib_time_now (vm);
1282 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1285 * Update transport time
1287 transport_update_time (wrk->last_vlib_time, thread_index);
1288 n_tx_packets = vec_len (wrk->pending_tx_buffers);
1291 * Dequeue and handle new events
1294 /* Try to dequeue what is available. Don't wait for lock.
1295 * XXX: we may need priorities here */
1296 mq = wrk->vpp_event_queue;
1297 n_to_dequeue = svm_msg_q_size (mq);
1298 if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
1300 for (i = 0; i < n_to_dequeue; i++)
1302 svm_msg_q_sub_w_lock (mq, msg);
1303 evt = svm_msg_q_msg_data (mq, msg);
1304 session_evt_add_to_list (wrk, evt);
1305 svm_msg_q_free_msg (mq, msg);
1307 svm_msg_q_unlock (mq);
1311 * Handle control events
1314 ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
1317 clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
1318 clib_llist_remove (wrk->event_elts, evt_list, elt);
1319 session_event_dispatch_ctrl (wrk, elt);
1324 * Handle the new io events.
1327 new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
1328 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1329 old_ti = clib_llist_prev_index (old_he, evt_list);
1331 ei = clib_llist_next_index (new_he, evt_list);
1332 while (ei != wrk->new_head && n_tx_packets < VLIB_FRAME_SIZE)
1334 elt = pool_elt_at_index (wrk->event_elts, ei);
1335 ei = clib_llist_next_index (elt, evt_list);
1336 clib_llist_remove (wrk->event_elts, evt_list, elt);
1337 session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1341 * Handle the old io events, if we had any prior to processing the new ones
1344 if (old_ti != wrk->old_head)
1346 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1347 ei = clib_llist_next_index (old_he, evt_list);
1349 while (n_tx_packets < VLIB_FRAME_SIZE)
1351 elt = pool_elt_at_index (wrk->event_elts, ei);
1352 next_ei = clib_llist_next_index (elt, evt_list);
1353 clib_llist_remove (wrk->event_elts, evt_list, elt);
1355 session_event_dispatch_io (wrk, node, elt, thread_index,
1365 if (vec_len (wrk->pending_tx_buffers))
1366 session_flush_pending_tx_buffers (wrk, node);
1368 vlib_node_increment_counter (vm, session_queue_node.index,
1369 SESSION_QUEUE_ERROR_TX, n_tx_packets);
1371 SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1373 return n_tx_packets;
1377 VLIB_REGISTER_NODE (session_queue_node) =
1379 .function = session_queue_node_fn,
1380 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1381 .name = "session-queue",
1382 .format_trace = format_session_queue_trace,
1383 .type = VLIB_NODE_TYPE_INPUT,
1384 .n_errors = ARRAY_LEN (session_queue_error_strings),
1385 .error_strings = session_queue_error_strings,
1386 .state = VLIB_NODE_STATE_DISABLED,
1391 dump_thread_0_event_queue (void)
1393 session_main_t *smm = vnet_get_session_main ();
1394 vlib_main_t *vm = &vlib_global_main;
1395 u32 my_thread_index = vm->thread_index;
1396 session_event_t _e, *e = &_e;
1397 svm_msg_q_ring_t *ring;
1399 svm_msg_q_msg_t *msg;
1403 mq = smm->wrk[my_thread_index].vpp_event_queue;
1404 index = mq->q->head;
1406 for (i = 0; i < mq->q->cursize; i++)
1408 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1409 ring = svm_msg_q_ring (mq, msg->ring_index);
1410 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1412 switch (e->event_type)
1414 case SESSION_IO_EVT_TX:
1415 s0 = session_event_get_session (e, my_thread_index);
1416 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
1419 case SESSION_CTRL_EVT_CLOSE:
1420 s0 = session_get_from_handle (e->session_handle);
1421 fformat (stdout, "[%04d] disconnect session %d\n", i,
1425 case SESSION_IO_EVT_BUILTIN_RX:
1426 s0 = session_event_get_session (e, my_thread_index);
1427 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
1430 case SESSION_CTRL_EVT_RPC:
1431 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1432 i, (u64) (uword) (e->rpc_args.fp),
1433 (u64) (uword) (e->rpc_args.arg));
1437 fformat (stdout, "[%04d] unhandled event type %d\n",
1444 if (index == mq->q->maxsize)
1450 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1453 switch (e->event_type)
1455 case SESSION_IO_EVT_RX:
1456 case SESSION_IO_EVT_TX:
1457 case SESSION_IO_EVT_BUILTIN_RX:
1458 case SESSION_IO_EVT_BUILTIN_TX:
1459 case SESSION_IO_EVT_TX_FLUSH:
1460 if (e->session_index == f->master_session_index)
1463 case SESSION_CTRL_EVT_CLOSE:
1465 case SESSION_CTRL_EVT_RPC:
1466 s = session_get_from_handle (e->session_handle);
1469 clib_warning ("session has event but doesn't exist!");
1472 if (s->rx_fifo == f || s->tx_fifo == f)
1482 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1484 session_evt_elt_t *elt;
1485 session_worker_t *wrk;
1486 int i, index, found = 0;
1487 svm_msg_q_msg_t *msg;
1488 svm_msg_q_ring_t *ring;
1493 thread_index = f->master_thread_index;
1494 wrk = session_main_get_worker (thread_index);
1499 mq = wrk->vpp_event_queue;
1500 index = mq->q->head;
1501 for (i = 0; i < mq->q->cursize; i++)
1503 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1504 ring = svm_msg_q_ring (mq, msg->ring_index);
1505 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1506 found = session_node_cmp_event (e, f);
1509 index = (index + 1) % mq->q->maxsize;
1512 * Search pending events vector
1516 clib_llist_foreach (wrk->event_elts, evt_list,
1517 pool_elt_at_index (wrk->event_elts, wrk->new_head),
1519 found = session_node_cmp_event (&elt->evt, f);
1522 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1529 clib_llist_foreach (wrk->event_elts, evt_list,
1530 pool_elt_at_index (wrk->event_elts, wrk->old_head),
1532 found = session_node_cmp_event (&elt->evt, f);
1535 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1545 static clib_error_t *
1546 session_queue_exit (vlib_main_t * vm)
1548 if (vec_len (vlib_mains) < 2)
1552 * Shut off (especially) worker-thread session nodes.
1553 * Otherwise, vpp can crash as the main thread unmaps the
1556 vlib_worker_thread_barrier_sync (vm);
1557 session_node_enable_disable (0 /* is_enable */ );
1558 vlib_worker_thread_barrier_release (vm);
1562 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1565 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1568 f64 now, timeout = 1.0;
1569 uword *event_data = 0;
1574 vlib_process_wait_for_event_or_clock (vm, timeout);
1575 now = vlib_time_now (vm);
1576 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1580 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1581 /* Flush the frames by updating all transports times */
1582 transport_update_time (now, 0);
1584 case SESSION_Q_PROCESS_STOP:
1588 /* Timed out. Update time for all transports to trigger all
1589 * outstanding retransmits. */
1590 transport_update_time (now, 0);
1593 vec_reset_length (event_data);
1599 VLIB_REGISTER_NODE (session_queue_process_node) =
1601 .function = session_queue_process,
1602 .type = VLIB_NODE_TYPE_PROCESS,
1603 .name = "session-queue-process",
1604 .state = VLIB_NODE_STATE_DISABLED,
1608 static_always_inline uword
1609 session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1610 vlib_frame_t * frame)
1612 session_main_t *sm = &session_main;
1613 if (!sm->wrk[0].vpp_event_queue)
1615 node = vlib_node_get_runtime (vm, session_queue_node.index);
1616 return session_queue_node_fn (vm, node, frame);
1620 VLIB_REGISTER_NODE (session_queue_pre_input_node) =
1622 .function = session_queue_pre_input_inline,
1623 .type = VLIB_NODE_TYPE_PRE_INPUT,
1624 .name = "session-queue-main",
1625 .state = VLIB_NODE_STATE_DISABLED,
1630 * fd.io coding-style-patch-verification: ON
1633 * eval: (c-set-style "gnu")