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->app_index = app->app_index;
59 a->wrk_map_index = mp->wrk_index;
61 if ((rv = vnet_listen (a)))
62 clib_warning ("listen returned: %d", rv);
64 app_wrk = application_get_worker (app, mp->wrk_index);
65 mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
70 session_mq_listen_uri_handler (void *data)
72 session_listen_uri_msg_t *mp = (session_listen_uri_msg_t *) data;
73 vnet_listen_args_t _a, *a = &_a;
74 app_worker_t *app_wrk;
78 app_check_thread_and_barrier (session_mq_listen_uri_handler, mp);
80 app = application_lookup (mp->client_index);
84 clib_memset (a, 0, sizeof (*a));
85 a->uri = (char *) mp->uri;
86 a->app_index = app->app_index;
87 rv = vnet_bind_uri (a);
89 app_wrk = application_get_worker (app, 0);
90 mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
94 session_mq_connect_handler (void *data)
96 session_connect_msg_t *mp = (session_connect_msg_t *) data;
97 vnet_connect_args_t _a, *a = &_a;
98 app_worker_t *app_wrk;
102 app_check_thread_and_barrier (session_mq_connect_handler, mp);
104 app = application_lookup (mp->client_index);
108 clib_memset (a, 0, sizeof (*a));
109 a->sep.is_ip4 = mp->is_ip4;
110 clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
111 a->sep.port = mp->port;
112 a->sep.transport_proto = mp->proto;
113 a->sep.peer.fib_index = mp->vrf;
114 clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip));
115 a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
116 a->sep_ext.parent_handle = mp->parent_handle;
117 a->sep_ext.ckpair_index = mp->ckpair_index;
118 if (mp->hostname_len)
120 vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
121 clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
123 a->api_context = mp->context;
124 a->app_index = app->app_index;
125 a->wrk_map_index = mp->wrk_index;
127 if ((rv = vnet_connect (a)))
129 clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
130 app_wrk = application_get_worker (app, mp->wrk_index);
131 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
135 vec_free (a->sep_ext.hostname);
139 session_mq_connect_uri_handler (void *data)
141 session_connect_uri_msg_t *mp = (session_connect_uri_msg_t *) data;
142 vnet_connect_args_t _a, *a = &_a;
143 app_worker_t *app_wrk;
147 app_check_thread_and_barrier (session_mq_connect_uri_handler, mp);
149 app = application_lookup (mp->client_index);
153 clib_memset (a, 0, sizeof (*a));
154 a->uri = (char *) mp->uri;
155 a->api_context = mp->context;
156 a->app_index = app->app_index;
157 if ((rv = vnet_connect_uri (a)))
159 clib_warning ("connect_uri returned: %d", rv);
160 app_wrk = application_get_worker (app, 0 /* default wrk only */ );
161 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
167 session_mq_disconnect_handler (void *data)
169 session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
170 vnet_disconnect_args_t _a, *a = &_a;
173 app = application_lookup (mp->client_index);
177 a->app_index = app->app_index;
178 a->handle = mp->handle;
179 vnet_disconnect_session (a);
183 app_mq_detach_handler (void *data)
185 session_app_detach_msg_t *mp = (session_app_detach_msg_t *) data;
186 vnet_app_detach_args_t _a, *a = &_a;
189 app_check_thread_and_barrier (app_mq_detach_handler, mp);
191 app = application_lookup (mp->client_index);
195 a->app_index = app->app_index;
196 a->api_client_index = mp->client_index;
197 vnet_application_detach (a);
201 session_mq_unlisten_handler (void *data)
203 session_unlisten_msg_t *mp = (session_unlisten_msg_t *) data;
204 vnet_unlisten_args_t _a, *a = &_a;
205 app_worker_t *app_wrk;
209 app_check_thread_and_barrier (session_mq_unlisten_handler, mp);
211 app = application_lookup (mp->client_index);
215 clib_memset (a, 0, sizeof (*a));
216 a->app_index = app->app_index;
217 a->handle = mp->handle;
218 a->wrk_map_index = mp->wrk_index;
219 if ((rv = vnet_unlisten (a)))
220 clib_warning ("unlisten returned: %d", rv);
222 app_wrk = application_get_worker (app, a->wrk_map_index);
226 mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
230 session_mq_accepted_reply_handler (void *data)
232 session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
233 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
234 session_state_t old_state;
235 app_worker_t *app_wrk;
238 /* Server isn't interested, kill the session */
241 a->app_index = mp->context;
242 a->handle = mp->handle;
243 vnet_disconnect_session (a);
247 /* Mail this back from the main thread. We're not polling in main
248 * thread so we're using other workers for notifications. */
249 if (vlib_num_workers () && vlib_get_thread_index () != 0
250 && session_thread_from_handle (mp->handle) == 0)
252 vlib_rpc_call_main_thread (session_mq_accepted_reply_handler,
253 (u8 *) mp, sizeof (*mp));
257 s = session_get_from_handle_if_valid (mp->handle);
261 app_wrk = app_worker_get (s->app_wrk_index);
262 if (app_wrk->app_index != mp->context)
264 clib_warning ("app doesn't own session");
268 if (!session_has_transport (s))
270 s->session_state = SESSION_STATE_READY;
271 if (ct_session_connect_notify (s))
276 old_state = s->session_state;
277 s->session_state = SESSION_STATE_READY;
279 if (!svm_fifo_is_empty_prod (s->rx_fifo))
280 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
282 /* Closed while waiting for app to reply. Resend disconnect */
283 if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
285 app_worker_close_notify (app_wrk, s);
286 s->session_state = old_state;
293 session_mq_reset_reply_handler (void *data)
295 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
296 session_reset_reply_msg_t *mp;
297 app_worker_t *app_wrk;
300 u32 index, thread_index;
302 mp = (session_reset_reply_msg_t *) data;
303 app = application_lookup (mp->context);
307 session_parse_handle (mp->handle, &index, &thread_index);
308 s = session_get_if_valid (index, thread_index);
310 /* Session was already closed or already cleaned up */
311 if (!s || s->session_state != SESSION_STATE_TRANSPORT_CLOSING)
314 app_wrk = app_worker_get (s->app_wrk_index);
315 if (!app_wrk || app_wrk->app_index != app->app_index)
317 clib_warning ("App %u does not own handle 0x%lx!", app->app_index,
322 /* Client objected to resetting the session, log and continue */
325 clib_warning ("client retval %d", mp->retval);
329 /* This comes as a response to a reset, transport only waiting for
330 * confirmation to remove connection state, no need to disconnect */
331 a->handle = mp->handle;
332 a->app_index = app->app_index;
333 vnet_disconnect_session (a);
337 session_mq_disconnected_handler (void *data)
339 session_disconnected_reply_msg_t *rmp;
340 vnet_disconnect_args_t _a, *a = &_a;
341 svm_msg_q_msg_t _msg, *msg = &_msg;
342 session_disconnected_msg_t *mp;
343 app_worker_t *app_wrk;
344 session_event_t *evt;
349 mp = (session_disconnected_msg_t *) data;
350 if (!(s = session_get_from_handle_if_valid (mp->handle)))
352 clib_warning ("could not disconnect handle %llu", mp->handle);
355 app_wrk = app_worker_get (s->app_wrk_index);
356 app = application_lookup (mp->client_index);
357 if (!(app_wrk && app && app->app_index == app_wrk->app_index))
359 clib_warning ("could not disconnect session: %llu app: %u",
360 mp->handle, mp->client_index);
364 a->handle = mp->handle;
365 a->app_index = app_wrk->wrk_index;
366 rv = vnet_disconnect_session (a);
368 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
369 SESSION_MQ_CTRL_EVT_RING,
371 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
372 clib_memset (evt, 0, sizeof (*evt));
373 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
374 rmp = (session_disconnected_reply_msg_t *) evt->data;
375 rmp->handle = mp->handle;
376 rmp->context = mp->context;
378 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
382 session_mq_disconnected_reply_handler (void *data)
384 session_disconnected_reply_msg_t *mp;
385 vnet_disconnect_args_t _a, *a = &_a;
388 mp = (session_disconnected_reply_msg_t *) data;
390 /* Client objected to disconnecting the session, log and continue */
393 clib_warning ("client retval %d", mp->retval);
397 /* Disconnect has been confirmed. Confirm close to transport */
398 app = application_lookup (mp->context);
401 a->handle = mp->handle;
402 a->app_index = app->app_index;
403 vnet_disconnect_session (a);
408 session_mq_worker_update_handler (void *data)
410 session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
411 session_worker_update_reply_msg_t *rmp;
412 svm_msg_q_msg_t _msg, *msg = &_msg;
413 app_worker_t *app_wrk;
414 u32 owner_app_wrk_map;
415 session_event_t *evt;
419 app = application_lookup (mp->client_index);
422 if (!(s = session_get_from_handle_if_valid (mp->handle)))
424 clib_warning ("invalid handle %llu", mp->handle);
427 app_wrk = app_worker_get (s->app_wrk_index);
428 if (app_wrk->app_index != app->app_index)
430 clib_warning ("app %u does not own session %llu", app->app_index,
434 owner_app_wrk_map = app_wrk->wrk_map_index;
435 app_wrk = application_get_worker (app, mp->wrk_index);
437 /* This needs to come from the new owner */
438 if (mp->req_wrk_index == owner_app_wrk_map)
440 session_req_worker_update_msg_t *wump;
442 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
443 SESSION_MQ_CTRL_EVT_RING,
445 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
446 clib_memset (evt, 0, sizeof (*evt));
447 evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
448 wump = (session_req_worker_update_msg_t *) evt->data;
449 wump->session_handle = mp->handle;
450 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
454 app_worker_own_session (app_wrk, s);
459 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
460 SESSION_MQ_CTRL_EVT_RING,
462 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
463 clib_memset (evt, 0, sizeof (*evt));
464 evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
465 rmp = (session_worker_update_reply_msg_t *) evt->data;
466 rmp->handle = mp->handle;
467 rmp->rx_fifo = pointer_to_uword (s->rx_fifo);
468 rmp->tx_fifo = pointer_to_uword (s->tx_fifo);
469 rmp->segment_handle = session_segment_handle (s);
470 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
473 * Retransmit messages that may have been lost
475 if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
476 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
478 if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
479 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
481 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
482 app_worker_close_notify (app_wrk, s);
485 vlib_node_registration_t session_queue_node;
490 u32 server_thread_index;
491 } session_queue_trace_t;
493 /* packet trace format function */
495 format_session_queue_trace (u8 * s, va_list * args)
497 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
498 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
499 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
501 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
502 t->session_index, t->server_thread_index);
506 #define foreach_session_queue_error \
507 _(TX, "Packets transmitted") \
508 _(TIMER, "Timer events") \
509 _(NO_BUFFER, "Out of buffers")
513 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
514 foreach_session_queue_error
516 SESSION_QUEUE_N_ERROR,
517 } session_queue_error_t;
519 static char *session_queue_error_strings[] = {
520 #define _(sym,string) string,
521 foreach_session_queue_error
527 SESSION_TX_NO_BUFFERS = -2,
533 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
534 u32 next_index, u32 * to_next, u16 n_segs,
535 session_t * s, u32 n_trace)
537 session_queue_trace_t *t;
541 for (i = 0; i < clib_min (n_trace, n_segs); i++)
543 b = vlib_get_buffer (vm, to_next[i - n_segs]);
544 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
545 t = vlib_add_trace (vm, node, b, sizeof (*t));
546 t->session_index = s->session_index;
547 t->server_thread_index = s->thread_index;
549 vlib_set_trace_count (vm, node, n_trace - i);
553 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
554 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
556 vlib_buffer_t *chain_b, *prev_b;
557 u32 chain_bi0, to_deq, left_from_seg;
558 session_worker_t *wrk;
559 u16 len_to_deq, n_bytes_read;
562 wrk = session_main_get_worker (ctx->s->thread_index);
563 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
564 b->total_length_not_including_first_buffer = 0;
567 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
569 to_deq = left_from_seg;
570 for (j = 1; j < ctx->n_bufs_per_seg; j++)
573 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
576 chain_bi0 = wrk->tx_buffers[*n_bufs];
577 chain_b = vlib_get_buffer (vm, chain_bi0);
578 chain_b->current_data = 0;
579 data = vlib_buffer_get_current (chain_b);
582 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
583 ctx->tx_offset, len_to_deq, data);
584 ctx->tx_offset += n_bytes_read;
588 if (ctx->transport_vft->transport_options.tx_type ==
591 svm_fifo_t *f = ctx->s->tx_fifo;
592 session_dgram_hdr_t *hdr = &ctx->hdr;
594 deq_now = clib_min (hdr->data_length - hdr->data_offset,
596 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
598 ASSERT (n_bytes_read > 0);
600 hdr->data_offset += n_bytes_read;
601 if (hdr->data_offset == hdr->data_length)
603 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
604 svm_fifo_dequeue_drop (f, offset);
608 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
611 ASSERT (n_bytes_read == len_to_deq);
612 chain_b->current_length = n_bytes_read;
613 b->total_length_not_including_first_buffer += chain_b->current_length;
615 /* update previous buffer */
616 prev_b->next_buffer = chain_bi0;
617 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
619 /* update current buffer */
620 chain_b->next_buffer = 0;
622 to_deq -= n_bytes_read;
627 && b->total_length_not_including_first_buffer == left_from_seg);
628 ctx->left_to_snd -= left_from_seg;
632 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
633 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
640 * Start with the first buffer in chain
643 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
646 data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
647 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
651 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->tx_offset,
653 ASSERT (n_bytes_read > 0);
654 /* Keep track of progress locally, transport is also supposed to
655 * increment it independently when pushing the header */
656 ctx->tx_offset += n_bytes_read;
660 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
662 session_dgram_hdr_t *hdr = &ctx->hdr;
663 svm_fifo_t *f = ctx->s->tx_fifo;
667 ASSERT (hdr->data_length > hdr->data_offset);
668 deq_now = clib_min (hdr->data_length - hdr->data_offset,
670 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
671 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
672 ASSERT (n_bytes_read > 0);
674 if (ctx->s->session_state == SESSION_STATE_LISTENING)
676 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
677 ctx->tc->rmt_port = hdr->rmt_port;
679 hdr->data_offset += n_bytes_read;
680 if (hdr->data_offset == hdr->data_length)
682 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
683 svm_fifo_dequeue_drop (f, offset);
688 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
690 ASSERT (n_bytes_read > 0);
693 b->current_length = n_bytes_read;
694 ctx->left_to_snd -= n_bytes_read;
697 * Fill in the remaining buffers in the chain, if any
699 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
700 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
704 session_tx_not_ready (session_t * s, u8 peek_data)
708 if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
710 /* Can retransmit for closed sessions but can't send new data if
711 * session is not ready or closed */
712 else if (s->session_state < SESSION_STATE_READY)
714 else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
716 /* Allow closed transports to still send custom packets.
717 * For instance, tcp may want to send acks in time-wait. */
718 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
719 && (s->flags & SESSION_F_CUSTOM_TX))
727 always_inline transport_connection_t *
728 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
732 return ctx->transport_vft->get_connection (ctx->s->connection_index,
733 ctx->s->thread_index);
737 if (ctx->s->session_state == SESSION_STATE_LISTENING)
738 return ctx->transport_vft->get_listener (ctx->s->connection_index);
741 return ctx->transport_vft->get_connection (ctx->s->connection_index,
742 ctx->s->thread_index);
748 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
749 u32 max_segs, u8 peek_data)
751 u32 n_bytes_per_buf, n_bytes_per_seg;
752 ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
755 /* Offset in rx fifo from where to peek data */
756 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
757 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
759 ctx->max_len_to_snd = 0;
762 ctx->max_dequeue -= ctx->tx_offset;
766 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
768 if (ctx->max_dequeue <= sizeof (ctx->hdr))
770 ctx->max_len_to_snd = 0;
773 svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
775 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
776 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
779 ASSERT (ctx->max_dequeue > 0);
781 /* Ensure we're not writing more than transport window allows */
782 if (ctx->max_dequeue < ctx->snd_space)
784 /* Constrained by tx queue. Try to send only fully formed segments */
785 ctx->max_len_to_snd =
786 (ctx->max_dequeue > ctx->snd_mss) ?
787 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
792 /* Expectation is that snd_space0 is already a multiple of snd_mss */
793 ctx->max_len_to_snd = ctx->snd_space;
796 /* Check if we're tx constrained by the node */
797 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
798 if (ctx->n_segs_per_evt > max_segs)
800 ctx->n_segs_per_evt = max_segs;
801 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
804 n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
805 ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
806 n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->snd_mss;
807 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
808 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
809 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
811 TRANSPORT_MAX_HDRS_LEN);
815 session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
816 vlib_node_runtime_t * node,
817 session_evt_elt_t * elt,
818 int *n_tx_packets, u8 peek_data)
820 u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
821 session_tx_context_t *ctx = &wrk->ctx;
822 session_main_t *smm = &session_main;
823 session_event_t *e = &elt->evt;
824 vlib_main_t *vm = wrk->vm;
825 transport_proto_t tp;
829 if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
832 session_evt_add_old (wrk, elt);
833 return SESSION_TX_NO_DATA;
836 next_index = smm->session_type_to_next[ctx->s->session_type];
837 max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
839 tp = session_get_transport_proto (ctx->s);
840 ctx->transport_vft = transport_protocol_get_vft (tp);
841 ctx->tc = session_tx_get_transport (ctx, peek_data);
843 if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
845 if (ctx->transport_vft->flush_data)
846 ctx->transport_vft->flush_data (ctx->tc);
847 e->event_type = SESSION_IO_EVT_TX;
850 if (ctx->s->flags & SESSION_F_CUSTOM_TX)
853 ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
854 n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, max_burst);
855 *n_tx_packets += n_custom_tx;
857 (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
858 return SESSION_TX_OK;
859 max_burst -= n_custom_tx;
862 session_evt_add_old (wrk, elt);
863 return SESSION_TX_OK;
867 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
868 if (PREDICT_FALSE (ctx->snd_mss == 0))
870 session_evt_add_old (wrk, elt);
871 return SESSION_TX_NO_DATA;
874 ctx->snd_space = transport_connection_snd_space (ctx->tc, ctx->snd_mss);
876 /* This flow queue is "empty" so it should be re-evaluated before
877 * the ones that have data to send. */
878 if (ctx->snd_space == 0)
880 session_evt_add_head_old (wrk, elt);
881 return SESSION_TX_NO_DATA;
884 /* Allow enqueuing of a new event */
885 svm_fifo_unset_event (ctx->s->tx_fifo);
887 /* Check how much we can pull. */
888 session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
890 if (PREDICT_FALSE (!ctx->max_len_to_snd))
892 transport_connection_tx_pacer_reset_bucket (ctx->tc);
893 return SESSION_TX_NO_DATA;
896 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
897 vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
898 CLIB_CACHE_LINE_BYTES);
899 n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
900 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
903 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
904 session_evt_add_head_old (wrk, elt);
905 vlib_node_increment_counter (wrk->vm, node->node_index,
906 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
907 return SESSION_TX_NO_BUFFERS;
910 ctx->left_to_snd = ctx->max_len_to_snd;
911 n_left = ctx->n_segs_per_evt;
915 vlib_buffer_t *b0, *b1;
918 pbi = wrk->tx_buffers[n_bufs - 3];
919 pb = vlib_get_buffer (vm, pbi);
920 vlib_prefetch_buffer_header (pb, STORE);
921 pbi = wrk->tx_buffers[n_bufs - 4];
922 pb = vlib_get_buffer (vm, pbi);
923 vlib_prefetch_buffer_header (pb, STORE);
925 bi0 = wrk->tx_buffers[--n_bufs];
926 bi1 = wrk->tx_buffers[--n_bufs];
928 b0 = vlib_get_buffer (vm, bi0);
929 b1 = vlib_get_buffer (vm, bi1);
931 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
932 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
934 ctx->transport_vft->push_header (ctx->tc, b0);
935 ctx->transport_vft->push_header (ctx->tc, b1);
939 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
940 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
942 vec_add1 (wrk->pending_tx_buffers, bi0);
943 vec_add1 (wrk->pending_tx_buffers, bi1);
944 vec_add1 (wrk->pending_tx_nexts, next_index);
945 vec_add1 (wrk->pending_tx_nexts, next_index);
954 pbi = wrk->tx_buffers[n_bufs - 2];
955 pb = vlib_get_buffer (vm, pbi);
956 vlib_prefetch_buffer_header (pb, STORE);
959 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);
969 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
971 vec_add1 (wrk->pending_tx_buffers, bi0);
972 vec_add1 (wrk->pending_tx_nexts, next_index);
975 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
976 session_tx_trace_frame (vm, node, next_index, wrk->pending_tx_buffers,
977 ctx->n_segs_per_evt, ctx->s, n_trace);
979 if (PREDICT_FALSE (n_bufs))
980 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
982 *n_tx_packets += ctx->n_segs_per_evt;
983 transport_connection_update_tx_bytes (ctx->tc, ctx->max_len_to_snd);
985 SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
986 ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
988 /* If we couldn't dequeue all bytes mark as partially read */
989 ASSERT (ctx->left_to_snd == 0);
990 if (ctx->max_len_to_snd < ctx->max_dequeue)
991 if (svm_fifo_set_event (ctx->s->tx_fifo))
992 session_evt_add_old (wrk, elt);
995 && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
997 /* Fix dgram pre header */
998 if (ctx->max_len_to_snd < ctx->max_dequeue)
999 svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
1000 sizeof (session_dgram_pre_hdr_t));
1001 /* More data needs to be read */
1002 else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
1003 if (svm_fifo_set_event (ctx->s->tx_fifo))
1004 session_evt_add_old (wrk, elt);
1006 if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1007 session_dequeue_notify (ctx->s);
1009 return SESSION_TX_OK;
1013 session_tx_fifo_peek_and_snd (session_worker_t * wrk,
1014 vlib_node_runtime_t * node,
1015 session_evt_elt_t * e, int *n_tx_packets)
1017 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1021 session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
1022 vlib_node_runtime_t * node,
1023 session_evt_elt_t * e, int *n_tx_packets)
1025 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1029 session_tx_fifo_dequeue_internal (session_worker_t * wrk,
1030 vlib_node_runtime_t * node,
1031 session_evt_elt_t * e, int *n_tx_packets)
1033 session_t *s = wrk->ctx.s;
1035 if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1037 svm_fifo_unset_event (s->tx_fifo);
1038 return transport_custom_tx (session_get_transport_proto (s), s,
1039 VLIB_FRAME_SIZE - *n_tx_packets);
1042 always_inline session_t *
1043 session_event_get_session (session_event_t * e, u8 thread_index)
1045 return session_get_if_valid (e->session_index, thread_index);
1049 session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
1051 clib_llist_index_t ei;
1052 void (*fp) (void *);
1056 ei = clib_llist_entry_index (wrk->event_elts, elt);
1059 switch (e->event_type)
1061 case SESSION_CTRL_EVT_RPC:
1062 fp = e->rpc_args.fp;
1063 (*fp) (e->rpc_args.arg);
1065 case SESSION_CTRL_EVT_CLOSE:
1066 s = session_get_from_handle_if_valid (e->session_handle);
1067 if (PREDICT_FALSE (!s))
1069 session_transport_close (s);
1071 case SESSION_CTRL_EVT_RESET:
1072 s = session_get_from_handle_if_valid (e->session_handle);
1073 if (PREDICT_FALSE (!s))
1075 session_transport_reset (s);
1077 case SESSION_CTRL_EVT_LISTEN:
1078 session_mq_listen_handler (session_evt_ctrl_data (wrk, elt));
1080 case SESSION_CTRL_EVT_LISTEN_URI:
1081 session_mq_listen_uri_handler (session_evt_ctrl_data (wrk, elt));
1083 case SESSION_CTRL_EVT_UNLISTEN:
1084 session_mq_unlisten_handler (session_evt_ctrl_data (wrk, elt));
1086 case SESSION_CTRL_EVT_CONNECT:
1087 session_mq_connect_handler (session_evt_ctrl_data (wrk, elt));
1089 case SESSION_CTRL_EVT_CONNECT_URI:
1090 session_mq_connect_uri_handler (session_evt_ctrl_data (wrk, elt));
1092 case SESSION_CTRL_EVT_DISCONNECT:
1093 session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
1095 case SESSION_CTRL_EVT_DISCONNECTED:
1096 session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
1098 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
1099 session_mq_accepted_reply_handler (session_evt_ctrl_data (wrk, elt));
1101 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
1102 session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
1105 case SESSION_CTRL_EVT_RESET_REPLY:
1106 session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
1108 case SESSION_CTRL_EVT_WORKER_UPDATE:
1109 session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
1111 case SESSION_CTRL_EVT_APP_DETACH:
1112 app_mq_detach_handler (session_evt_ctrl_data (wrk, elt));
1115 clib_warning ("unhandled event type %d", e->event_type);
1118 /* Regrab elements in case pool moved */
1119 elt = pool_elt_at_index (wrk->event_elts, ei);
1120 if (!clib_llist_elt_is_linked (elt, evt_list))
1123 if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1124 session_evt_ctrl_data_free (wrk, elt);
1125 session_evt_elt_free (wrk, elt);
1130 session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
1131 session_evt_elt_t * elt, u32 thread_index,
1134 session_main_t *smm = &session_main;
1135 app_worker_t *app_wrk;
1136 clib_llist_index_t ei;
1140 ei = clib_llist_entry_index (wrk->event_elts, elt);
1143 switch (e->event_type)
1145 case SESSION_IO_EVT_TX_FLUSH:
1146 case SESSION_IO_EVT_TX:
1147 s = session_event_get_session (e, thread_index);
1148 if (PREDICT_FALSE (!s))
1150 clib_warning ("session %u was freed!", e->session_index);
1153 CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
1155 /* Spray packets in per session type frames, since they go to
1156 * different nodes */
1157 (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1159 case SESSION_IO_EVT_RX:
1160 s = session_event_get_session (e, thread_index);
1163 transport_app_rx_evt (session_get_transport_proto (s),
1164 s->connection_index, s->thread_index);
1166 case SESSION_IO_EVT_BUILTIN_RX:
1167 s = session_event_get_session (e, thread_index);
1168 if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1170 svm_fifo_unset_event (s->rx_fifo);
1171 app_wrk = app_worker_get (s->app_wrk_index);
1172 app_worker_builtin_rx (app_wrk, s);
1174 case SESSION_IO_EVT_BUILTIN_TX:
1175 s = session_get_from_handle_if_valid (e->session_handle);
1177 if (PREDICT_TRUE (s != 0))
1178 session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1181 clib_warning ("unhandled event type %d", e->event_type);
1184 /* Regrab elements in case pool moved */
1185 elt = pool_elt_at_index (wrk->event_elts, ei);
1186 if (!clib_llist_elt_is_linked (elt, evt_list))
1187 session_evt_elt_free (wrk, elt);
1191 static const u32 session_evt_msg_sizes[] = {
1192 #define _(symc, sym) \
1193 [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1194 foreach_session_ctrl_evt
1200 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1202 session_evt_elt_t *elt;
1204 if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1206 elt = session_evt_alloc_ctrl (wrk);
1207 if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1209 elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1210 elt->evt.event_type = evt->event_type;
1211 clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1212 session_evt_msg_sizes[evt->event_type]);
1216 /* Internal control events fit into io events footprint */
1217 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1222 elt = session_evt_alloc_new (wrk);
1223 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1228 session_flush_pending_tx_buffers (session_worker_t * wrk,
1229 vlib_node_runtime_t * node)
1231 vlib_buffer_enqueue_to_next (wrk->vm, node, wrk->pending_tx_buffers,
1232 wrk->pending_tx_nexts,
1233 vec_len (wrk->pending_tx_nexts));
1234 vec_reset_length (wrk->pending_tx_buffers);
1235 vec_reset_length (wrk->pending_tx_nexts);
1239 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1240 vlib_frame_t * frame)
1242 session_main_t *smm = vnet_get_session_main ();
1243 u32 thread_index = vm->thread_index, n_to_dequeue;
1244 session_worker_t *wrk = &smm->wrk[thread_index];
1245 session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1246 svm_msg_q_msg_t _msg, *msg = &_msg;
1247 clib_llist_index_t old_ti;
1248 int i, n_tx_packets = 0;
1249 session_event_t *evt;
1252 SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1254 wrk->last_vlib_time = vlib_time_now (vm);
1255 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1258 * Update transport time
1260 transport_update_time (wrk->last_vlib_time, thread_index);
1263 * Dequeue and handle new events
1266 /* Try to dequeue what is available. Don't wait for lock.
1267 * XXX: we may need priorities here */
1268 mq = wrk->vpp_event_queue;
1269 n_to_dequeue = svm_msg_q_size (mq);
1270 if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
1272 for (i = 0; i < n_to_dequeue; i++)
1274 svm_msg_q_sub_w_lock (mq, msg);
1275 evt = svm_msg_q_msg_data (mq, msg);
1276 session_evt_add_to_list (wrk, evt);
1277 svm_msg_q_free_msg (mq, msg);
1279 svm_msg_q_unlock (mq);
1283 * Handle control events
1286 ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
1289 clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
1290 clib_llist_remove (wrk->event_elts, evt_list, elt);
1291 session_event_dispatch_ctrl (wrk, elt);
1296 * Handle the new io events.
1299 new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
1300 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1301 old_ti = clib_llist_prev_index (old_he, evt_list);
1304 clib_llist_foreach_safe (wrk->event_elts, evt_list, new_he, elt, ({
1305 session_evt_type_t et;
1307 et = elt->evt.event_type;
1308 clib_llist_remove (wrk->event_elts, evt_list, elt);
1310 /* Postpone tx events if we can't handle them this dispatch cycle */
1311 if (n_tx_packets >= VLIB_FRAME_SIZE
1312 && (et == SESSION_IO_EVT_TX || et == SESSION_IO_EVT_TX_FLUSH))
1314 clib_llist_add (wrk->event_elts, evt_list, elt, new_he);
1318 session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1323 * Handle the old io events, if we had any prior to processing the new ones
1326 if (old_ti != wrk->old_head)
1328 clib_llist_index_t ei, next_ei;
1330 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1331 ei = clib_llist_next_index (old_he, evt_list);
1333 while (n_tx_packets < VLIB_FRAME_SIZE)
1335 elt = pool_elt_at_index (wrk->event_elts, ei);
1336 next_ei = clib_llist_next_index (elt, evt_list);
1337 clib_llist_remove (wrk->event_elts, evt_list, elt);
1339 session_event_dispatch_io (wrk, node, elt, thread_index,
1349 if (vec_len (wrk->pending_tx_buffers))
1350 session_flush_pending_tx_buffers (wrk, node);
1352 vlib_node_increment_counter (vm, session_queue_node.index,
1353 SESSION_QUEUE_ERROR_TX, n_tx_packets);
1355 SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1357 return n_tx_packets;
1361 VLIB_REGISTER_NODE (session_queue_node) =
1363 .function = session_queue_node_fn,
1364 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1365 .name = "session-queue",
1366 .format_trace = format_session_queue_trace,
1367 .type = VLIB_NODE_TYPE_INPUT,
1368 .n_errors = ARRAY_LEN (session_queue_error_strings),
1369 .error_strings = session_queue_error_strings,
1370 .state = VLIB_NODE_STATE_DISABLED,
1375 dump_thread_0_event_queue (void)
1377 session_main_t *smm = vnet_get_session_main ();
1378 vlib_main_t *vm = &vlib_global_main;
1379 u32 my_thread_index = vm->thread_index;
1380 session_event_t _e, *e = &_e;
1381 svm_msg_q_ring_t *ring;
1383 svm_msg_q_msg_t *msg;
1387 mq = smm->wrk[my_thread_index].vpp_event_queue;
1388 index = mq->q->head;
1390 for (i = 0; i < mq->q->cursize; i++)
1392 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1393 ring = svm_msg_q_ring (mq, msg->ring_index);
1394 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1396 switch (e->event_type)
1398 case SESSION_IO_EVT_TX:
1399 s0 = session_event_get_session (e, my_thread_index);
1400 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
1403 case SESSION_CTRL_EVT_CLOSE:
1404 s0 = session_get_from_handle (e->session_handle);
1405 fformat (stdout, "[%04d] disconnect session %d\n", i,
1409 case SESSION_IO_EVT_BUILTIN_RX:
1410 s0 = session_event_get_session (e, my_thread_index);
1411 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
1414 case SESSION_CTRL_EVT_RPC:
1415 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1416 i, (u64) (uword) (e->rpc_args.fp),
1417 (u64) (uword) (e->rpc_args.arg));
1421 fformat (stdout, "[%04d] unhandled event type %d\n",
1428 if (index == mq->q->maxsize)
1434 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1437 switch (e->event_type)
1439 case SESSION_IO_EVT_RX:
1440 case SESSION_IO_EVT_TX:
1441 case SESSION_IO_EVT_BUILTIN_RX:
1442 case SESSION_IO_EVT_BUILTIN_TX:
1443 case SESSION_IO_EVT_TX_FLUSH:
1444 if (e->session_index == f->master_session_index)
1447 case SESSION_CTRL_EVT_CLOSE:
1449 case SESSION_CTRL_EVT_RPC:
1450 s = session_get_from_handle (e->session_handle);
1453 clib_warning ("session has event but doesn't exist!");
1456 if (s->rx_fifo == f || s->tx_fifo == f)
1466 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1468 session_evt_elt_t *elt;
1469 session_worker_t *wrk;
1470 int i, index, found = 0;
1471 svm_msg_q_msg_t *msg;
1472 svm_msg_q_ring_t *ring;
1477 thread_index = f->master_thread_index;
1478 wrk = session_main_get_worker (thread_index);
1483 mq = wrk->vpp_event_queue;
1484 index = mq->q->head;
1485 for (i = 0; i < mq->q->cursize; i++)
1487 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1488 ring = svm_msg_q_ring (mq, msg->ring_index);
1489 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1490 found = session_node_cmp_event (e, f);
1493 index = (index + 1) % mq->q->maxsize;
1496 * Search pending events vector
1500 clib_llist_foreach (wrk->event_elts, evt_list,
1501 pool_elt_at_index (wrk->event_elts, wrk->new_head),
1503 found = session_node_cmp_event (&elt->evt, f);
1506 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1513 clib_llist_foreach (wrk->event_elts, evt_list,
1514 pool_elt_at_index (wrk->event_elts, wrk->old_head),
1516 found = session_node_cmp_event (&elt->evt, f);
1519 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1529 static clib_error_t *
1530 session_queue_exit (vlib_main_t * vm)
1532 if (vec_len (vlib_mains) < 2)
1536 * Shut off (especially) worker-thread session nodes.
1537 * Otherwise, vpp can crash as the main thread unmaps the
1540 vlib_worker_thread_barrier_sync (vm);
1541 session_node_enable_disable (0 /* is_enable */ );
1542 vlib_worker_thread_barrier_release (vm);
1546 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1549 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1552 f64 now, timeout = 1.0;
1553 uword *event_data = 0;
1558 vlib_process_wait_for_event_or_clock (vm, timeout);
1559 now = vlib_time_now (vm);
1560 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1564 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1565 /* Flush the frames by updating all transports times */
1566 transport_update_time (now, 0);
1568 case SESSION_Q_PROCESS_STOP:
1572 /* Timed out. Update time for all transports to trigger all
1573 * outstanding retransmits. */
1574 transport_update_time (now, 0);
1577 vec_reset_length (event_data);
1583 VLIB_REGISTER_NODE (session_queue_process_node) =
1585 .function = session_queue_process,
1586 .type = VLIB_NODE_TYPE_PROCESS,
1587 .name = "session-queue-process",
1588 .state = VLIB_NODE_STATE_DISABLED,
1592 static_always_inline uword
1593 session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1594 vlib_frame_t * frame)
1596 session_main_t *sm = &session_main;
1597 if (!sm->wrk[0].vpp_event_queue)
1599 return session_queue_node_fn (vm, node, frame);
1603 VLIB_REGISTER_NODE (session_queue_pre_input_node) =
1605 .function = session_queue_pre_input_inline,
1606 .type = VLIB_NODE_TYPE_PRE_INPUT,
1607 .name = "session-queue-main",
1608 .state = VLIB_NODE_STATE_DISABLED,
1613 * fd.io coding-style-patch-verification: ON
1616 * eval: (c-set-style "gnu")