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 if (mp->hostname_len)
122 vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
123 clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
125 a->api_context = mp->context;
126 a->app_index = app->app_index;
127 a->wrk_map_index = mp->wrk_index;
129 if ((rv = vnet_connect (a)))
131 clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
132 app_wrk = application_get_worker (app, mp->wrk_index);
133 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
137 vec_free (a->sep_ext.hostname);
141 session_mq_connect_uri_handler (void *data)
143 session_connect_uri_msg_t *mp = (session_connect_uri_msg_t *) data;
144 vnet_connect_args_t _a, *a = &_a;
145 app_worker_t *app_wrk;
149 app_check_thread_and_barrier (session_mq_connect_uri_handler, mp);
151 app = application_lookup (mp->client_index);
155 clib_memset (a, 0, sizeof (*a));
156 a->uri = (char *) mp->uri;
157 a->api_context = mp->context;
158 a->app_index = app->app_index;
159 if ((rv = vnet_connect_uri (a)))
161 clib_warning ("connect_uri returned: %d", rv);
162 app_wrk = application_get_worker (app, 0 /* default wrk only */ );
163 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
169 session_mq_disconnect_handler (void *data)
171 session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
172 vnet_disconnect_args_t _a, *a = &_a;
175 app = application_lookup (mp->client_index);
179 a->app_index = app->app_index;
180 a->handle = mp->handle;
181 vnet_disconnect_session (a);
185 app_mq_detach_handler (void *data)
187 session_app_detach_msg_t *mp = (session_app_detach_msg_t *) data;
188 vnet_app_detach_args_t _a, *a = &_a;
191 app_check_thread_and_barrier (app_mq_detach_handler, mp);
193 app = application_lookup (mp->client_index);
197 a->app_index = app->app_index;
198 a->api_client_index = mp->client_index;
199 vnet_application_detach (a);
203 session_mq_unlisten_handler (void *data)
205 session_unlisten_msg_t *mp = (session_unlisten_msg_t *) data;
206 vnet_unlisten_args_t _a, *a = &_a;
207 app_worker_t *app_wrk;
211 app_check_thread_and_barrier (session_mq_unlisten_handler, mp);
213 app = application_lookup (mp->client_index);
217 clib_memset (a, 0, sizeof (*a));
218 a->app_index = app->app_index;
219 a->handle = mp->handle;
220 a->wrk_map_index = mp->wrk_index;
221 if ((rv = vnet_unlisten (a)))
222 clib_warning ("unlisten returned: %d", rv);
224 app_wrk = application_get_worker (app, a->wrk_map_index);
228 mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
232 session_mq_accepted_reply_handler (void *data)
234 session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
235 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
236 session_state_t old_state;
237 app_worker_t *app_wrk;
240 /* Server isn't interested, kill the session */
243 a->app_index = mp->context;
244 a->handle = mp->handle;
245 vnet_disconnect_session (a);
249 /* Mail this back from the main thread. We're not polling in main
250 * thread so we're using other workers for notifications. */
251 if (vlib_num_workers () && vlib_get_thread_index () != 0
252 && session_thread_from_handle (mp->handle) == 0)
254 vlib_rpc_call_main_thread (session_mq_accepted_reply_handler,
255 (u8 *) mp, sizeof (*mp));
259 s = session_get_from_handle_if_valid (mp->handle);
263 app_wrk = app_worker_get (s->app_wrk_index);
264 if (app_wrk->app_index != mp->context)
266 clib_warning ("app doesn't own session");
270 if (!session_has_transport (s))
272 s->session_state = SESSION_STATE_READY;
273 if (ct_session_connect_notify (s))
278 old_state = s->session_state;
279 s->session_state = SESSION_STATE_READY;
281 if (!svm_fifo_is_empty_prod (s->rx_fifo))
282 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
284 /* Closed while waiting for app to reply. Resend disconnect */
285 if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
287 app_worker_close_notify (app_wrk, s);
288 s->session_state = old_state;
295 session_mq_reset_reply_handler (void *data)
297 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
298 session_reset_reply_msg_t *mp;
299 app_worker_t *app_wrk;
302 u32 index, thread_index;
304 mp = (session_reset_reply_msg_t *) data;
305 app = application_lookup (mp->context);
309 session_parse_handle (mp->handle, &index, &thread_index);
310 s = session_get_if_valid (index, thread_index);
312 /* Session was already closed or already cleaned up */
313 if (!s || s->session_state != SESSION_STATE_TRANSPORT_CLOSING)
316 app_wrk = app_worker_get (s->app_wrk_index);
317 if (!app_wrk || app_wrk->app_index != app->app_index)
319 clib_warning ("App %u does not own handle 0x%lx!", app->app_index,
324 /* Client objected to resetting the session, log and continue */
327 clib_warning ("client retval %d", mp->retval);
331 /* This comes as a response to a reset, transport only waiting for
332 * confirmation to remove connection state, no need to disconnect */
333 a->handle = mp->handle;
334 a->app_index = app->app_index;
335 vnet_disconnect_session (a);
339 session_mq_disconnected_handler (void *data)
341 session_disconnected_reply_msg_t *rmp;
342 vnet_disconnect_args_t _a, *a = &_a;
343 svm_msg_q_msg_t _msg, *msg = &_msg;
344 session_disconnected_msg_t *mp;
345 app_worker_t *app_wrk;
346 session_event_t *evt;
351 mp = (session_disconnected_msg_t *) data;
352 if (!(s = session_get_from_handle_if_valid (mp->handle)))
354 clib_warning ("could not disconnect handle %llu", mp->handle);
357 app_wrk = app_worker_get (s->app_wrk_index);
358 app = application_lookup (mp->client_index);
359 if (!(app_wrk && app && app->app_index == app_wrk->app_index))
361 clib_warning ("could not disconnect session: %llu app: %u",
362 mp->handle, mp->client_index);
366 a->handle = mp->handle;
367 a->app_index = app_wrk->wrk_index;
368 rv = vnet_disconnect_session (a);
370 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
371 SESSION_MQ_CTRL_EVT_RING,
373 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
374 clib_memset (evt, 0, sizeof (*evt));
375 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
376 rmp = (session_disconnected_reply_msg_t *) evt->data;
377 rmp->handle = mp->handle;
378 rmp->context = mp->context;
380 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
384 session_mq_disconnected_reply_handler (void *data)
386 session_disconnected_reply_msg_t *mp;
387 vnet_disconnect_args_t _a, *a = &_a;
390 mp = (session_disconnected_reply_msg_t *) data;
392 /* Client objected to disconnecting the session, log and continue */
395 clib_warning ("client retval %d", mp->retval);
399 /* Disconnect has been confirmed. Confirm close to transport */
400 app = application_lookup (mp->context);
403 a->handle = mp->handle;
404 a->app_index = app->app_index;
405 vnet_disconnect_session (a);
410 session_mq_worker_update_handler (void *data)
412 session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
413 session_worker_update_reply_msg_t *rmp;
414 svm_msg_q_msg_t _msg, *msg = &_msg;
415 app_worker_t *app_wrk;
416 u32 owner_app_wrk_map;
417 session_event_t *evt;
421 app = application_lookup (mp->client_index);
424 if (!(s = session_get_from_handle_if_valid (mp->handle)))
426 clib_warning ("invalid handle %llu", mp->handle);
429 app_wrk = app_worker_get (s->app_wrk_index);
430 if (app_wrk->app_index != app->app_index)
432 clib_warning ("app %u does not own session %llu", app->app_index,
436 owner_app_wrk_map = app_wrk->wrk_map_index;
437 app_wrk = application_get_worker (app, mp->wrk_index);
439 /* This needs to come from the new owner */
440 if (mp->req_wrk_index == owner_app_wrk_map)
442 session_req_worker_update_msg_t *wump;
444 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
445 SESSION_MQ_CTRL_EVT_RING,
447 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
448 clib_memset (evt, 0, sizeof (*evt));
449 evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
450 wump = (session_req_worker_update_msg_t *) evt->data;
451 wump->session_handle = mp->handle;
452 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
456 app_worker_own_session (app_wrk, s);
461 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
462 SESSION_MQ_CTRL_EVT_RING,
464 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
465 clib_memset (evt, 0, sizeof (*evt));
466 evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
467 rmp = (session_worker_update_reply_msg_t *) evt->data;
468 rmp->handle = mp->handle;
469 rmp->rx_fifo = pointer_to_uword (s->rx_fifo);
470 rmp->tx_fifo = pointer_to_uword (s->tx_fifo);
471 rmp->segment_handle = session_segment_handle (s);
472 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
475 * Retransmit messages that may have been lost
477 if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
478 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
480 if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
481 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
483 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
484 app_worker_close_notify (app_wrk, s);
487 vlib_node_registration_t session_queue_node;
492 u32 server_thread_index;
493 } session_queue_trace_t;
495 /* packet trace format function */
497 format_session_queue_trace (u8 * s, va_list * args)
499 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
500 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
501 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
503 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
504 t->session_index, t->server_thread_index);
508 #define foreach_session_queue_error \
509 _(TX, "Packets transmitted") \
510 _(TIMER, "Timer events") \
511 _(NO_BUFFER, "Out of buffers")
515 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
516 foreach_session_queue_error
518 SESSION_QUEUE_N_ERROR,
519 } session_queue_error_t;
521 static char *session_queue_error_strings[] = {
522 #define _(sym,string) string,
523 foreach_session_queue_error
529 SESSION_TX_NO_BUFFERS = -2,
535 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
536 u32 next_index, u32 * to_next, u16 n_segs,
537 session_t * s, u32 n_trace)
539 session_queue_trace_t *t;
543 for (i = 0; i < clib_min (n_trace, n_segs); i++)
545 b = vlib_get_buffer (vm, to_next[i - n_segs]);
546 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
547 t = vlib_add_trace (vm, node, b, sizeof (*t));
548 t->session_index = s->session_index;
549 t->server_thread_index = s->thread_index;
551 vlib_set_trace_count (vm, node, n_trace - i);
555 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
556 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
558 vlib_buffer_t *chain_b, *prev_b;
559 u32 chain_bi0, to_deq, left_from_seg;
560 session_worker_t *wrk;
561 u16 len_to_deq, n_bytes_read;
564 wrk = session_main_get_worker (ctx->s->thread_index);
565 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
566 b->total_length_not_including_first_buffer = 0;
569 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
571 to_deq = left_from_seg;
572 for (j = 1; j < ctx->n_bufs_per_seg; j++)
575 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
578 chain_bi0 = wrk->tx_buffers[*n_bufs];
579 chain_b = vlib_get_buffer (vm, chain_bi0);
580 chain_b->current_data = 0;
581 data = vlib_buffer_get_current (chain_b);
584 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
585 ctx->tx_offset, len_to_deq, data);
586 ctx->tx_offset += n_bytes_read;
590 if (ctx->transport_vft->transport_options.tx_type ==
593 svm_fifo_t *f = ctx->s->tx_fifo;
594 session_dgram_hdr_t *hdr = &ctx->hdr;
596 deq_now = clib_min (hdr->data_length - hdr->data_offset,
598 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
600 ASSERT (n_bytes_read > 0);
602 hdr->data_offset += n_bytes_read;
603 if (hdr->data_offset == hdr->data_length)
605 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
606 svm_fifo_dequeue_drop (f, offset);
610 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
613 ASSERT (n_bytes_read == len_to_deq);
614 chain_b->current_length = n_bytes_read;
615 b->total_length_not_including_first_buffer += chain_b->current_length;
617 /* update previous buffer */
618 prev_b->next_buffer = chain_bi0;
619 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
621 /* update current buffer */
622 chain_b->next_buffer = 0;
624 to_deq -= n_bytes_read;
629 && b->total_length_not_including_first_buffer == left_from_seg);
630 ctx->left_to_snd -= left_from_seg;
634 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
635 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
642 * Start with the first buffer in chain
645 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
648 data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
649 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
653 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->tx_offset,
655 ASSERT (n_bytes_read > 0);
656 /* Keep track of progress locally, transport is also supposed to
657 * increment it independently when pushing the header */
658 ctx->tx_offset += n_bytes_read;
662 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
664 session_dgram_hdr_t *hdr = &ctx->hdr;
665 svm_fifo_t *f = ctx->s->tx_fifo;
669 ASSERT (hdr->data_length > hdr->data_offset);
670 deq_now = clib_min (hdr->data_length - hdr->data_offset,
672 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
673 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
674 ASSERT (n_bytes_read > 0);
676 if (ctx->s->session_state == SESSION_STATE_LISTENING)
678 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
679 ctx->tc->rmt_port = hdr->rmt_port;
681 hdr->data_offset += n_bytes_read;
682 if (hdr->data_offset == hdr->data_length)
684 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
685 svm_fifo_dequeue_drop (f, offset);
690 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
692 ASSERT (n_bytes_read > 0);
695 b->current_length = n_bytes_read;
696 ctx->left_to_snd -= n_bytes_read;
699 * Fill in the remaining buffers in the chain, if any
701 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
702 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
706 session_tx_not_ready (session_t * s, u8 peek_data)
710 if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
712 /* Can retransmit for closed sessions but can't send new data if
713 * session is not ready or closed */
714 else if (s->session_state < SESSION_STATE_READY)
716 else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
718 /* Allow closed transports to still send custom packets.
719 * For instance, tcp may want to send acks in time-wait. */
720 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
721 && (s->flags & SESSION_F_CUSTOM_TX))
729 always_inline transport_connection_t *
730 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
734 return ctx->transport_vft->get_connection (ctx->s->connection_index,
735 ctx->s->thread_index);
739 if (ctx->s->session_state == SESSION_STATE_LISTENING)
740 return ctx->transport_vft->get_listener (ctx->s->connection_index);
743 return ctx->transport_vft->get_connection (ctx->s->connection_index,
744 ctx->s->thread_index);
750 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
751 u32 max_segs, u8 peek_data)
753 u32 n_bytes_per_buf, n_bytes_per_seg;
754 ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
757 /* Offset in rx fifo from where to peek data */
758 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
759 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
761 ctx->max_len_to_snd = 0;
764 ctx->max_dequeue -= ctx->tx_offset;
768 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
770 if (ctx->max_dequeue <= sizeof (ctx->hdr))
772 ctx->max_len_to_snd = 0;
775 svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
777 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
778 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
781 ASSERT (ctx->max_dequeue > 0);
783 /* Ensure we're not writing more than transport window allows */
784 if (ctx->max_dequeue < ctx->snd_space)
786 /* Constrained by tx queue. Try to send only fully formed segments */
787 ctx->max_len_to_snd =
788 (ctx->max_dequeue > ctx->snd_mss) ?
789 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
794 /* Expectation is that snd_space0 is already a multiple of snd_mss */
795 ctx->max_len_to_snd = ctx->snd_space;
798 /* Check if we're tx constrained by the node */
799 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
800 if (ctx->n_segs_per_evt > max_segs)
802 ctx->n_segs_per_evt = max_segs;
803 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
806 n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
807 ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
808 n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->snd_mss;
809 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
810 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
811 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
813 TRANSPORT_MAX_HDRS_LEN);
817 session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
818 vlib_node_runtime_t * node,
819 session_evt_elt_t * elt,
820 int *n_tx_packets, u8 peek_data)
822 u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
823 session_tx_context_t *ctx = &wrk->ctx;
824 session_main_t *smm = &session_main;
825 session_event_t *e = &elt->evt;
826 vlib_main_t *vm = wrk->vm;
827 transport_proto_t tp;
831 if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
834 session_evt_add_old (wrk, elt);
835 return SESSION_TX_NO_DATA;
838 next_index = smm->session_type_to_next[ctx->s->session_type];
839 max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
841 tp = session_get_transport_proto (ctx->s);
842 ctx->transport_vft = transport_protocol_get_vft (tp);
843 ctx->tc = session_tx_get_transport (ctx, peek_data);
845 if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
847 if (ctx->transport_vft->flush_data)
848 ctx->transport_vft->flush_data (ctx->tc);
849 e->event_type = SESSION_IO_EVT_TX;
852 if (ctx->s->flags & SESSION_F_CUSTOM_TX)
855 ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
856 n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, max_burst);
857 *n_tx_packets += n_custom_tx;
859 (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
860 return SESSION_TX_OK;
861 max_burst -= n_custom_tx;
864 session_evt_add_old (wrk, elt);
865 return SESSION_TX_OK;
869 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
870 if (PREDICT_FALSE (ctx->snd_mss == 0))
872 session_evt_add_old (wrk, elt);
873 return SESSION_TX_NO_DATA;
876 ctx->snd_space = transport_connection_snd_space (ctx->tc, ctx->snd_mss);
878 /* This flow queue is "empty" so it should be re-evaluated before
879 * the ones that have data to send. */
880 if (ctx->snd_space == 0)
882 session_evt_add_head_old (wrk, elt);
883 return SESSION_TX_NO_DATA;
886 /* Allow enqueuing of a new event */
887 svm_fifo_unset_event (ctx->s->tx_fifo);
889 /* Check how much we can pull. */
890 session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
892 if (PREDICT_FALSE (!ctx->max_len_to_snd))
894 transport_connection_tx_pacer_reset_bucket (ctx->tc);
895 return SESSION_TX_NO_DATA;
898 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
899 vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
900 CLIB_CACHE_LINE_BYTES);
901 n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
902 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
905 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
906 if (svm_fifo_set_event (ctx->s->tx_fifo))
907 session_evt_add_head_old (wrk, elt);
908 vlib_node_increment_counter (wrk->vm, node->node_index,
909 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
910 return SESSION_TX_NO_BUFFERS;
913 ctx->left_to_snd = ctx->max_len_to_snd;
914 n_left = ctx->n_segs_per_evt;
918 vlib_buffer_t *b0, *b1;
921 pbi = wrk->tx_buffers[n_bufs - 3];
922 pb = vlib_get_buffer (vm, pbi);
923 vlib_prefetch_buffer_header (pb, STORE);
924 pbi = wrk->tx_buffers[n_bufs - 4];
925 pb = vlib_get_buffer (vm, pbi);
926 vlib_prefetch_buffer_header (pb, STORE);
928 bi0 = wrk->tx_buffers[--n_bufs];
929 bi1 = wrk->tx_buffers[--n_bufs];
931 b0 = vlib_get_buffer (vm, bi0);
932 b1 = vlib_get_buffer (vm, bi1);
934 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
935 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
937 ctx->transport_vft->push_header (ctx->tc, b0);
938 ctx->transport_vft->push_header (ctx->tc, b1);
942 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
943 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
945 vec_add1 (wrk->pending_tx_buffers, bi0);
946 vec_add1 (wrk->pending_tx_buffers, bi1);
947 vec_add1 (wrk->pending_tx_nexts, next_index);
948 vec_add1 (wrk->pending_tx_nexts, next_index);
957 pbi = wrk->tx_buffers[n_bufs - 2];
958 pb = vlib_get_buffer (vm, pbi);
959 vlib_prefetch_buffer_header (pb, STORE);
962 bi0 = wrk->tx_buffers[--n_bufs];
963 b0 = vlib_get_buffer (vm, bi0);
964 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
966 /* Ask transport to push header after current_length and
967 * total_length_not_including_first_buffer are updated */
968 ctx->transport_vft->push_header (ctx->tc, b0);
972 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
974 vec_add1 (wrk->pending_tx_buffers, bi0);
975 vec_add1 (wrk->pending_tx_nexts, next_index);
978 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
979 session_tx_trace_frame (vm, node, next_index, wrk->pending_tx_buffers,
980 ctx->n_segs_per_evt, ctx->s, n_trace);
982 if (PREDICT_FALSE (n_bufs))
983 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
985 *n_tx_packets += ctx->n_segs_per_evt;
986 transport_connection_update_tx_bytes (ctx->tc, ctx->max_len_to_snd);
988 SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
989 ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
991 /* If we couldn't dequeue all bytes mark as partially read */
992 ASSERT (ctx->left_to_snd == 0);
993 if (ctx->max_len_to_snd < ctx->max_dequeue)
994 if (svm_fifo_set_event (ctx->s->tx_fifo))
995 session_evt_add_old (wrk, elt);
998 && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
1000 /* Fix dgram pre header */
1001 if (ctx->max_len_to_snd < ctx->max_dequeue)
1002 svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
1003 sizeof (session_dgram_pre_hdr_t));
1004 /* More data needs to be read */
1005 else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
1006 if (svm_fifo_set_event (ctx->s->tx_fifo))
1007 session_evt_add_old (wrk, elt);
1009 if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1010 session_dequeue_notify (ctx->s);
1012 return SESSION_TX_OK;
1016 session_tx_fifo_peek_and_snd (session_worker_t * wrk,
1017 vlib_node_runtime_t * node,
1018 session_evt_elt_t * e, int *n_tx_packets)
1020 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1024 session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
1025 vlib_node_runtime_t * node,
1026 session_evt_elt_t * e, int *n_tx_packets)
1028 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1032 session_tx_fifo_dequeue_internal (session_worker_t * wrk,
1033 vlib_node_runtime_t * node,
1034 session_evt_elt_t * e, int *n_tx_packets)
1036 session_t *s = wrk->ctx.s;
1038 if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1040 svm_fifo_unset_event (s->tx_fifo);
1041 return transport_custom_tx (session_get_transport_proto (s), s,
1042 VLIB_FRAME_SIZE - *n_tx_packets);
1045 always_inline session_t *
1046 session_event_get_session (session_event_t * e, u8 thread_index)
1048 return session_get_if_valid (e->session_index, thread_index);
1052 session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
1054 clib_llist_index_t ei;
1055 void (*fp) (void *);
1059 ei = clib_llist_entry_index (wrk->event_elts, elt);
1062 switch (e->event_type)
1064 case SESSION_CTRL_EVT_RPC:
1065 fp = e->rpc_args.fp;
1066 (*fp) (e->rpc_args.arg);
1068 case SESSION_CTRL_EVT_CLOSE:
1069 s = session_get_from_handle_if_valid (e->session_handle);
1070 if (PREDICT_FALSE (!s))
1072 session_transport_close (s);
1074 case SESSION_CTRL_EVT_RESET:
1075 s = session_get_from_handle_if_valid (e->session_handle);
1076 if (PREDICT_FALSE (!s))
1078 session_transport_reset (s);
1080 case SESSION_CTRL_EVT_LISTEN:
1081 session_mq_listen_handler (session_evt_ctrl_data (wrk, elt));
1083 case SESSION_CTRL_EVT_LISTEN_URI:
1084 session_mq_listen_uri_handler (session_evt_ctrl_data (wrk, elt));
1086 case SESSION_CTRL_EVT_UNLISTEN:
1087 session_mq_unlisten_handler (session_evt_ctrl_data (wrk, elt));
1089 case SESSION_CTRL_EVT_CONNECT:
1090 session_mq_connect_handler (session_evt_ctrl_data (wrk, elt));
1092 case SESSION_CTRL_EVT_CONNECT_URI:
1093 session_mq_connect_uri_handler (session_evt_ctrl_data (wrk, elt));
1095 case SESSION_CTRL_EVT_DISCONNECT:
1096 session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
1098 case SESSION_CTRL_EVT_DISCONNECTED:
1099 session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
1101 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
1102 session_mq_accepted_reply_handler (session_evt_ctrl_data (wrk, elt));
1104 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
1105 session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
1108 case SESSION_CTRL_EVT_RESET_REPLY:
1109 session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
1111 case SESSION_CTRL_EVT_WORKER_UPDATE:
1112 session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
1114 case SESSION_CTRL_EVT_APP_DETACH:
1115 app_mq_detach_handler (session_evt_ctrl_data (wrk, elt));
1118 clib_warning ("unhandled event type %d", e->event_type);
1121 /* Regrab elements in case pool moved */
1122 elt = pool_elt_at_index (wrk->event_elts, ei);
1123 if (!clib_llist_elt_is_linked (elt, evt_list))
1126 if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1127 session_evt_ctrl_data_free (wrk, elt);
1128 session_evt_elt_free (wrk, elt);
1133 session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
1134 session_evt_elt_t * elt, u32 thread_index,
1137 session_main_t *smm = &session_main;
1138 app_worker_t *app_wrk;
1139 clib_llist_index_t ei;
1143 ei = clib_llist_entry_index (wrk->event_elts, elt);
1146 switch (e->event_type)
1148 case SESSION_IO_EVT_TX_FLUSH:
1149 case SESSION_IO_EVT_TX:
1150 s = session_event_get_session (e, thread_index);
1151 if (PREDICT_FALSE (!s))
1153 clib_warning ("session %u was freed!", e->session_index);
1156 CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
1158 /* Spray packets in per session type frames, since they go to
1159 * different nodes */
1160 (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1162 case SESSION_IO_EVT_RX:
1163 s = session_event_get_session (e, thread_index);
1166 transport_app_rx_evt (session_get_transport_proto (s),
1167 s->connection_index, s->thread_index);
1169 case SESSION_IO_EVT_BUILTIN_RX:
1170 s = session_event_get_session (e, thread_index);
1171 if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1173 svm_fifo_unset_event (s->rx_fifo);
1174 app_wrk = app_worker_get (s->app_wrk_index);
1175 app_worker_builtin_rx (app_wrk, s);
1177 case SESSION_IO_EVT_BUILTIN_TX:
1178 s = session_get_from_handle_if_valid (e->session_handle);
1180 if (PREDICT_TRUE (s != 0))
1181 session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1184 clib_warning ("unhandled event type %d", e->event_type);
1187 /* Regrab elements in case pool moved */
1188 elt = pool_elt_at_index (wrk->event_elts, ei);
1189 if (!clib_llist_elt_is_linked (elt, evt_list))
1190 session_evt_elt_free (wrk, elt);
1194 static const u32 session_evt_msg_sizes[] = {
1195 #define _(symc, sym) \
1196 [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1197 foreach_session_ctrl_evt
1203 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1205 session_evt_elt_t *elt;
1207 if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1209 elt = session_evt_alloc_ctrl (wrk);
1210 if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1212 elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1213 elt->evt.event_type = evt->event_type;
1214 clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1215 session_evt_msg_sizes[evt->event_type]);
1219 /* Internal control events fit into io events footprint */
1220 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1225 elt = session_evt_alloc_new (wrk);
1226 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1231 session_flush_pending_tx_buffers (session_worker_t * wrk,
1232 vlib_node_runtime_t * node)
1234 vlib_buffer_enqueue_to_next (wrk->vm, node, wrk->pending_tx_buffers,
1235 wrk->pending_tx_nexts,
1236 vec_len (wrk->pending_tx_nexts));
1237 vec_reset_length (wrk->pending_tx_buffers);
1238 vec_reset_length (wrk->pending_tx_nexts);
1242 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1243 vlib_frame_t * frame)
1245 session_main_t *smm = vnet_get_session_main ();
1246 u32 thread_index = vm->thread_index, n_to_dequeue;
1247 session_worker_t *wrk = &smm->wrk[thread_index];
1248 session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1249 svm_msg_q_msg_t _msg, *msg = &_msg;
1250 clib_llist_index_t old_ti;
1251 int i, n_tx_packets = 0;
1252 session_event_t *evt;
1255 SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1257 wrk->last_vlib_time = vlib_time_now (vm);
1258 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1261 * Update transport time
1263 transport_update_time (wrk->last_vlib_time, thread_index);
1266 * Dequeue and handle new events
1269 /* Try to dequeue what is available. Don't wait for lock.
1270 * XXX: we may need priorities here */
1271 mq = wrk->vpp_event_queue;
1272 n_to_dequeue = svm_msg_q_size (mq);
1273 if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
1275 for (i = 0; i < n_to_dequeue; i++)
1277 svm_msg_q_sub_w_lock (mq, msg);
1278 evt = svm_msg_q_msg_data (mq, msg);
1279 session_evt_add_to_list (wrk, evt);
1280 svm_msg_q_free_msg (mq, msg);
1282 svm_msg_q_unlock (mq);
1286 * Handle control events
1289 ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
1292 clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
1293 clib_llist_remove (wrk->event_elts, evt_list, elt);
1294 session_event_dispatch_ctrl (wrk, elt);
1299 * Handle the new io events.
1302 new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
1303 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1304 old_ti = clib_llist_prev_index (old_he, evt_list);
1307 clib_llist_foreach_safe (wrk->event_elts, evt_list, new_he, elt, ({
1308 session_evt_type_t et;
1310 et = elt->evt.event_type;
1311 clib_llist_remove (wrk->event_elts, evt_list, elt);
1313 /* Postpone tx events if we can't handle them this dispatch cycle */
1314 if (n_tx_packets >= VLIB_FRAME_SIZE
1315 && (et == SESSION_IO_EVT_TX || et == SESSION_IO_EVT_TX_FLUSH))
1317 clib_llist_add (wrk->event_elts, evt_list, elt, new_he);
1321 session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1326 * Handle the old io events, if we had any prior to processing the new ones
1329 if (old_ti != wrk->old_head)
1331 clib_llist_index_t ei, next_ei;
1333 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1334 ei = clib_llist_next_index (old_he, evt_list);
1336 while (n_tx_packets < VLIB_FRAME_SIZE)
1338 elt = pool_elt_at_index (wrk->event_elts, ei);
1339 next_ei = clib_llist_next_index (elt, evt_list);
1340 clib_llist_remove (wrk->event_elts, evt_list, elt);
1342 session_event_dispatch_io (wrk, node, elt, thread_index,
1352 if (vec_len (wrk->pending_tx_buffers))
1353 session_flush_pending_tx_buffers (wrk, node);
1355 vlib_node_increment_counter (vm, session_queue_node.index,
1356 SESSION_QUEUE_ERROR_TX, n_tx_packets);
1358 SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1360 return n_tx_packets;
1364 VLIB_REGISTER_NODE (session_queue_node) =
1366 .function = session_queue_node_fn,
1367 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1368 .name = "session-queue",
1369 .format_trace = format_session_queue_trace,
1370 .type = VLIB_NODE_TYPE_INPUT,
1371 .n_errors = ARRAY_LEN (session_queue_error_strings),
1372 .error_strings = session_queue_error_strings,
1373 .state = VLIB_NODE_STATE_DISABLED,
1378 dump_thread_0_event_queue (void)
1380 session_main_t *smm = vnet_get_session_main ();
1381 vlib_main_t *vm = &vlib_global_main;
1382 u32 my_thread_index = vm->thread_index;
1383 session_event_t _e, *e = &_e;
1384 svm_msg_q_ring_t *ring;
1386 svm_msg_q_msg_t *msg;
1390 mq = smm->wrk[my_thread_index].vpp_event_queue;
1391 index = mq->q->head;
1393 for (i = 0; i < mq->q->cursize; i++)
1395 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1396 ring = svm_msg_q_ring (mq, msg->ring_index);
1397 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1399 switch (e->event_type)
1401 case SESSION_IO_EVT_TX:
1402 s0 = session_event_get_session (e, my_thread_index);
1403 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
1406 case SESSION_CTRL_EVT_CLOSE:
1407 s0 = session_get_from_handle (e->session_handle);
1408 fformat (stdout, "[%04d] disconnect session %d\n", i,
1412 case SESSION_IO_EVT_BUILTIN_RX:
1413 s0 = session_event_get_session (e, my_thread_index);
1414 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
1417 case SESSION_CTRL_EVT_RPC:
1418 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1419 i, (u64) (uword) (e->rpc_args.fp),
1420 (u64) (uword) (e->rpc_args.arg));
1424 fformat (stdout, "[%04d] unhandled event type %d\n",
1431 if (index == mq->q->maxsize)
1437 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1440 switch (e->event_type)
1442 case SESSION_IO_EVT_RX:
1443 case SESSION_IO_EVT_TX:
1444 case SESSION_IO_EVT_BUILTIN_RX:
1445 case SESSION_IO_EVT_BUILTIN_TX:
1446 case SESSION_IO_EVT_TX_FLUSH:
1447 if (e->session_index == f->master_session_index)
1450 case SESSION_CTRL_EVT_CLOSE:
1452 case SESSION_CTRL_EVT_RPC:
1453 s = session_get_from_handle (e->session_handle);
1456 clib_warning ("session has event but doesn't exist!");
1459 if (s->rx_fifo == f || s->tx_fifo == f)
1469 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1471 session_evt_elt_t *elt;
1472 session_worker_t *wrk;
1473 int i, index, found = 0;
1474 svm_msg_q_msg_t *msg;
1475 svm_msg_q_ring_t *ring;
1480 thread_index = f->master_thread_index;
1481 wrk = session_main_get_worker (thread_index);
1486 mq = wrk->vpp_event_queue;
1487 index = mq->q->head;
1488 for (i = 0; i < mq->q->cursize; i++)
1490 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1491 ring = svm_msg_q_ring (mq, msg->ring_index);
1492 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1493 found = session_node_cmp_event (e, f);
1496 index = (index + 1) % mq->q->maxsize;
1499 * Search pending events vector
1503 clib_llist_foreach (wrk->event_elts, evt_list,
1504 pool_elt_at_index (wrk->event_elts, wrk->new_head),
1506 found = session_node_cmp_event (&elt->evt, f);
1509 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1516 clib_llist_foreach (wrk->event_elts, evt_list,
1517 pool_elt_at_index (wrk->event_elts, wrk->old_head),
1519 found = session_node_cmp_event (&elt->evt, f);
1522 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1532 static clib_error_t *
1533 session_queue_exit (vlib_main_t * vm)
1535 if (vec_len (vlib_mains) < 2)
1539 * Shut off (especially) worker-thread session nodes.
1540 * Otherwise, vpp can crash as the main thread unmaps the
1543 vlib_worker_thread_barrier_sync (vm);
1544 session_node_enable_disable (0 /* is_enable */ );
1545 vlib_worker_thread_barrier_release (vm);
1549 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1552 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1555 f64 now, timeout = 1.0;
1556 uword *event_data = 0;
1561 vlib_process_wait_for_event_or_clock (vm, timeout);
1562 now = vlib_time_now (vm);
1563 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1567 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1568 /* Flush the frames by updating all transports times */
1569 transport_update_time (now, 0);
1571 case SESSION_Q_PROCESS_STOP:
1575 /* Timed out. Update time for all transports to trigger all
1576 * outstanding retransmits. */
1577 transport_update_time (now, 0);
1580 vec_reset_length (event_data);
1586 VLIB_REGISTER_NODE (session_queue_process_node) =
1588 .function = session_queue_process,
1589 .type = VLIB_NODE_TYPE_PROCESS,
1590 .name = "session-queue-process",
1591 .state = VLIB_NODE_STATE_DISABLED,
1595 static_always_inline uword
1596 session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1597 vlib_frame_t * frame)
1599 session_main_t *sm = &session_main;
1600 if (!sm->wrk[0].vpp_event_queue)
1602 return session_queue_node_fn (vm, node, frame);
1606 VLIB_REGISTER_NODE (session_queue_pre_input_node) =
1608 .function = session_queue_pre_input_inline,
1609 .type = VLIB_NODE_TYPE_PRE_INPUT,
1610 .name = "session-queue-main",
1611 .state = VLIB_NODE_STATE_DISABLED,
1616 * fd.io coding-style-patch-verification: ON
1619 * eval: (c-set-style "gnu")