2 * Copyright (c) 2017-2019 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 #include <vlib/vlib.h>
18 #include <vnet/vnet.h>
19 #include <vppinfra/elog.h>
20 #include <vnet/session/transport.h>
21 #include <vnet/session/session.h>
22 #include <vnet/session/application.h>
23 #include <vnet/session/application_interface.h>
24 #include <vnet/session/application_local.h>
25 #include <vnet/session/session_debug.h>
26 #include <svm/queue.h>
28 #define app_check_thread_and_barrier(_fn, _arg) \
29 if (!vlib_thread_is_main_w_barrier ()) \
31 vlib_rpc_call_main_thread (_fn, (u8 *) _arg, sizeof(*_arg)); \
36 session_mq_listen_handler (void *data)
38 session_listen_msg_t *mp = (session_listen_msg_t *) data;
39 vnet_listen_args_t _a, *a = &_a;
40 app_worker_t *app_wrk;
44 app_check_thread_and_barrier (session_mq_listen_handler, mp);
46 app = application_lookup (mp->client_index);
50 clib_memset (a, 0, sizeof (*a));
51 a->sep.is_ip4 = mp->is_ip4;
52 clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
53 a->sep.port = mp->port;
54 a->sep.fib_index = mp->vrf;
55 a->sep.sw_if_index = ENDPOINT_INVALID_INDEX;
56 a->sep.transport_proto = mp->proto;
57 a->app_index = app->app_index;
58 a->wrk_map_index = mp->wrk_index;
60 if ((rv = vnet_listen (a)))
61 clib_warning ("listen returned: %d", rv);
63 app_wrk = application_get_worker (app, mp->wrk_index);
64 mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
69 session_mq_listen_uri_handler (void *data)
71 session_listen_uri_msg_t *mp = (session_listen_uri_msg_t *) data;
72 vnet_listen_args_t _a, *a = &_a;
73 app_worker_t *app_wrk;
77 app_check_thread_and_barrier (session_mq_listen_uri_handler, mp);
79 app = application_lookup (mp->client_index);
83 clib_memset (a, 0, sizeof (*a));
84 a->uri = (char *) mp->uri;
85 a->app_index = app->app_index;
86 rv = vnet_bind_uri (a);
88 app_wrk = application_get_worker (app, 0);
89 mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
93 session_mq_connect_handler (void *data)
95 session_connect_msg_t *mp = (session_connect_msg_t *) data;
96 vnet_connect_args_t _a, *a = &_a;
97 app_worker_t *app_wrk;
101 app_check_thread_and_barrier (session_mq_connect_handler, mp);
103 app = application_lookup (mp->client_index);
107 clib_memset (a, 0, sizeof (*a));
108 a->sep.is_ip4 = mp->is_ip4;
109 clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
110 a->sep.port = mp->port;
111 a->sep.transport_proto = mp->proto;
112 a->sep.peer.fib_index = mp->vrf;
113 clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip));
114 a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
115 a->sep_ext.parent_handle = mp->parent_handle;
116 if (mp->hostname_len)
118 vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
119 clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
121 a->api_context = mp->context;
122 a->app_index = app->app_index;
123 a->wrk_map_index = mp->wrk_index;
125 if ((rv = vnet_connect (a)))
127 clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
128 app_wrk = application_get_worker (app, mp->wrk_index);
129 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
133 vec_free (a->sep_ext.hostname);
137 session_mq_connect_uri_handler (void *data)
139 session_connect_uri_msg_t *mp = (session_connect_uri_msg_t *) data;
140 vnet_connect_args_t _a, *a = &_a;
141 app_worker_t *app_wrk;
145 app_check_thread_and_barrier (session_mq_connect_uri_handler, mp);
147 app = application_lookup (mp->client_index);
151 clib_memset (a, 0, sizeof (*a));
152 a->uri = (char *) mp->uri;
153 a->api_context = mp->context;
154 a->app_index = app->app_index;
155 if ((rv = vnet_connect_uri (a)))
157 clib_warning ("connect_uri returned: %d", rv);
158 app_wrk = application_get_worker (app, 0 /* default wrk only */ );
159 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
165 session_mq_disconnect_handler (void *data)
167 session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
168 vnet_disconnect_args_t _a, *a = &_a;
171 app = application_lookup (mp->client_index);
175 a->app_index = app->app_index;
176 a->handle = mp->handle;
177 vnet_disconnect_session (a);
181 app_mq_detach_handler (void *data)
183 session_app_detach_msg_t *mp = (session_app_detach_msg_t *) data;
184 vnet_app_detach_args_t _a, *a = &_a;
187 app_check_thread_and_barrier (app_mq_detach_handler, mp);
189 app = application_lookup (mp->client_index);
193 a->app_index = app->app_index;
194 a->api_client_index = mp->client_index;
195 vnet_application_detach (a);
199 session_mq_unlisten_handler (void *data)
201 session_unlisten_msg_t *mp = (session_unlisten_msg_t *) data;
202 vnet_unlisten_args_t _a, *a = &_a;
203 app_worker_t *app_wrk;
207 app_check_thread_and_barrier (session_mq_unlisten_handler, mp);
209 app = application_lookup (mp->client_index);
213 clib_memset (a, 0, sizeof (*a));
214 a->app_index = app->app_index;
215 a->handle = mp->handle;
216 a->wrk_map_index = mp->wrk_index;
217 if ((rv = vnet_unlisten (a)))
218 clib_warning ("unlisten returned: %d", rv);
220 app_wrk = application_get_worker (app, a->wrk_map_index);
224 mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
228 session_mq_accepted_reply_handler (void *data)
230 session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
231 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
232 session_state_t old_state;
233 app_worker_t *app_wrk;
236 /* Server isn't interested, kill the session */
239 a->app_index = mp->context;
240 a->handle = mp->handle;
241 vnet_disconnect_session (a);
245 /* Mail this back from the main thread. We're not polling in main
246 * thread so we're using other workers for notifications. */
247 if (vlib_num_workers () && vlib_get_thread_index () != 0
248 && session_thread_from_handle (mp->handle) == 0)
250 vlib_rpc_call_main_thread (session_mq_accepted_reply_handler,
251 (u8 *) mp, sizeof (*mp));
255 s = session_get_from_handle_if_valid (mp->handle);
259 app_wrk = app_worker_get (s->app_wrk_index);
260 if (app_wrk->app_index != mp->context)
262 clib_warning ("app doesn't own session");
266 if (!session_has_transport (s))
268 s->session_state = SESSION_STATE_READY;
269 if (ct_session_connect_notify (s))
274 old_state = s->session_state;
275 s->session_state = SESSION_STATE_READY;
277 if (!svm_fifo_is_empty_prod (s->rx_fifo))
278 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
280 /* Closed while waiting for app to reply. Resend disconnect */
281 if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
283 app_worker_close_notify (app_wrk, s);
284 s->session_state = old_state;
291 session_mq_reset_reply_handler (void *data)
293 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
294 session_reset_reply_msg_t *mp;
295 app_worker_t *app_wrk;
298 u32 index, thread_index;
300 mp = (session_reset_reply_msg_t *) data;
301 app = application_lookup (mp->context);
305 session_parse_handle (mp->handle, &index, &thread_index);
306 s = session_get_if_valid (index, thread_index);
308 /* No session or not the right session */
309 if (!s || s->session_state < SESSION_STATE_TRANSPORT_CLOSING)
312 app_wrk = app_worker_get (s->app_wrk_index);
313 if (!app_wrk || app_wrk->app_index != app->app_index)
315 clib_warning ("App % does not own handle 0x%lx!", app->app_index,
320 /* Client objected to resetting the session, log and continue */
323 clib_warning ("client retval %d", mp->retval);
327 /* This comes as a response to a reset, transport only waiting for
328 * confirmation to remove connection state, no need to disconnect */
329 a->handle = mp->handle;
330 a->app_index = app->app_index;
331 vnet_disconnect_session (a);
335 session_mq_disconnected_handler (void *data)
337 session_disconnected_reply_msg_t *rmp;
338 vnet_disconnect_args_t _a, *a = &_a;
339 svm_msg_q_msg_t _msg, *msg = &_msg;
340 session_disconnected_msg_t *mp;
341 app_worker_t *app_wrk;
342 session_event_t *evt;
347 mp = (session_disconnected_msg_t *) data;
348 if (!(s = session_get_from_handle_if_valid (mp->handle)))
350 clib_warning ("could not disconnect handle %llu", mp->handle);
353 app_wrk = app_worker_get (s->app_wrk_index);
354 app = application_lookup (mp->client_index);
355 if (!(app_wrk && app && app->app_index == app_wrk->app_index))
357 clib_warning ("could not disconnect session: %llu app: %u",
358 mp->handle, mp->client_index);
362 a->handle = mp->handle;
363 a->app_index = app_wrk->wrk_index;
364 rv = vnet_disconnect_session (a);
366 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
367 SESSION_MQ_CTRL_EVT_RING,
369 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
370 clib_memset (evt, 0, sizeof (*evt));
371 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
372 rmp = (session_disconnected_reply_msg_t *) evt->data;
373 rmp->handle = mp->handle;
374 rmp->context = mp->context;
376 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
380 session_mq_disconnected_reply_handler (void *data)
382 session_disconnected_reply_msg_t *mp;
383 vnet_disconnect_args_t _a, *a = &_a;
386 mp = (session_disconnected_reply_msg_t *) data;
388 /* Client objected to disconnecting the session, log and continue */
391 clib_warning ("client retval %d", mp->retval);
395 /* Disconnect has been confirmed. Confirm close to transport */
396 app = application_lookup (mp->context);
399 a->handle = mp->handle;
400 a->app_index = app->app_index;
401 vnet_disconnect_session (a);
406 session_mq_worker_update_handler (void *data)
408 session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
409 session_worker_update_reply_msg_t *rmp;
410 svm_msg_q_msg_t _msg, *msg = &_msg;
411 app_worker_t *app_wrk;
412 u32 owner_app_wrk_map;
413 session_event_t *evt;
417 app = application_lookup (mp->client_index);
420 if (!(s = session_get_from_handle_if_valid (mp->handle)))
422 clib_warning ("invalid handle %llu", mp->handle);
425 app_wrk = app_worker_get (s->app_wrk_index);
426 if (app_wrk->app_index != app->app_index)
428 clib_warning ("app %u does not own session %llu", app->app_index,
432 owner_app_wrk_map = app_wrk->wrk_map_index;
433 app_wrk = application_get_worker (app, mp->wrk_index);
435 /* This needs to come from the new owner */
436 if (mp->req_wrk_index == owner_app_wrk_map)
438 session_req_worker_update_msg_t *wump;
440 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
441 SESSION_MQ_CTRL_EVT_RING,
443 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
444 clib_memset (evt, 0, sizeof (*evt));
445 evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
446 wump = (session_req_worker_update_msg_t *) evt->data;
447 wump->session_handle = mp->handle;
448 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
452 app_worker_own_session (app_wrk, s);
457 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
458 SESSION_MQ_CTRL_EVT_RING,
460 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
461 clib_memset (evt, 0, sizeof (*evt));
462 evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
463 rmp = (session_worker_update_reply_msg_t *) evt->data;
464 rmp->handle = mp->handle;
465 rmp->rx_fifo = pointer_to_uword (s->rx_fifo);
466 rmp->tx_fifo = pointer_to_uword (s->tx_fifo);
467 rmp->segment_handle = session_segment_handle (s);
468 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
471 * Retransmit messages that may have been lost
473 if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
474 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
476 if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
477 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
479 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
480 app_worker_close_notify (app_wrk, s);
483 vlib_node_registration_t session_queue_node;
488 u32 server_thread_index;
489 } session_queue_trace_t;
491 /* packet trace format function */
493 format_session_queue_trace (u8 * s, va_list * args)
495 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
496 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
497 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
499 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
500 t->session_index, t->server_thread_index);
504 #define foreach_session_queue_error \
505 _(TX, "Packets transmitted") \
506 _(TIMER, "Timer events") \
507 _(NO_BUFFER, "Out of buffers")
511 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
512 foreach_session_queue_error
514 SESSION_QUEUE_N_ERROR,
515 } session_queue_error_t;
517 static char *session_queue_error_strings[] = {
518 #define _(sym,string) string,
519 foreach_session_queue_error
525 SESSION_TX_NO_BUFFERS = -2,
531 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
532 u32 next_index, u32 * to_next, u16 n_segs,
533 session_t * s, u32 n_trace)
535 session_queue_trace_t *t;
539 for (i = 0; i < clib_min (n_trace, n_segs); i++)
541 b = vlib_get_buffer (vm, to_next[i - n_segs]);
542 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
543 t = vlib_add_trace (vm, node, b, sizeof (*t));
544 t->session_index = s->session_index;
545 t->server_thread_index = s->thread_index;
547 vlib_set_trace_count (vm, node, n_trace - i);
551 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
552 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
554 vlib_buffer_t *chain_b, *prev_b;
555 u32 chain_bi0, to_deq, left_from_seg;
556 session_worker_t *wrk;
557 u16 len_to_deq, n_bytes_read;
560 wrk = session_main_get_worker (ctx->s->thread_index);
561 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
562 b->total_length_not_including_first_buffer = 0;
565 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
567 to_deq = left_from_seg;
568 for (j = 1; j < ctx->n_bufs_per_seg; j++)
571 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
574 chain_bi0 = wrk->tx_buffers[*n_bufs];
575 chain_b = vlib_get_buffer (vm, chain_bi0);
576 chain_b->current_data = 0;
577 data = vlib_buffer_get_current (chain_b);
580 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
581 ctx->tx_offset, len_to_deq, data);
582 ctx->tx_offset += n_bytes_read;
586 if (ctx->transport_vft->transport_options.tx_type ==
589 svm_fifo_t *f = ctx->s->tx_fifo;
590 session_dgram_hdr_t *hdr = &ctx->hdr;
592 deq_now = clib_min (hdr->data_length - hdr->data_offset,
594 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
596 ASSERT (n_bytes_read > 0);
598 hdr->data_offset += n_bytes_read;
599 if (hdr->data_offset == hdr->data_length)
601 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
602 svm_fifo_dequeue_drop (f, offset);
606 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
609 ASSERT (n_bytes_read == len_to_deq);
610 chain_b->current_length = n_bytes_read;
611 b->total_length_not_including_first_buffer += chain_b->current_length;
613 /* update previous buffer */
614 prev_b->next_buffer = chain_bi0;
615 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
617 /* update current buffer */
618 chain_b->next_buffer = 0;
620 to_deq -= n_bytes_read;
625 && b->total_length_not_including_first_buffer == left_from_seg);
626 ctx->left_to_snd -= left_from_seg;
630 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
631 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
638 * Start with the first buffer in chain
641 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
644 data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
645 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
649 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->tx_offset,
651 ASSERT (n_bytes_read > 0);
652 /* Keep track of progress locally, transport is also supposed to
653 * increment it independently when pushing the header */
654 ctx->tx_offset += n_bytes_read;
658 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
660 session_dgram_hdr_t *hdr = &ctx->hdr;
661 svm_fifo_t *f = ctx->s->tx_fifo;
665 ASSERT (hdr->data_length > hdr->data_offset);
666 deq_now = clib_min (hdr->data_length - hdr->data_offset,
668 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
669 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
670 ASSERT (n_bytes_read > 0);
672 if (ctx->s->session_state == SESSION_STATE_LISTENING)
674 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
675 ctx->tc->rmt_port = hdr->rmt_port;
677 hdr->data_offset += n_bytes_read;
678 if (hdr->data_offset == hdr->data_length)
680 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
681 svm_fifo_dequeue_drop (f, offset);
686 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
688 ASSERT (n_bytes_read > 0);
691 b->current_length = n_bytes_read;
692 ctx->left_to_snd -= n_bytes_read;
695 * Fill in the remaining buffers in the chain, if any
697 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
698 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
702 session_tx_not_ready (session_t * s, u8 peek_data)
706 if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
708 /* Can retransmit for closed sessions but can't send new data if
709 * session is not ready or closed */
710 else if (s->session_state < SESSION_STATE_READY)
712 else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
714 /* Allow closed transports to still send custom packets.
715 * For instance, tcp may want to send acks in time-wait. */
716 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
717 && (s->flags & SESSION_F_CUSTOM_TX))
725 always_inline transport_connection_t *
726 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
730 return ctx->transport_vft->get_connection (ctx->s->connection_index,
731 ctx->s->thread_index);
735 if (ctx->s->session_state == SESSION_STATE_LISTENING)
736 return ctx->transport_vft->get_listener (ctx->s->connection_index);
739 return ctx->transport_vft->get_connection (ctx->s->connection_index,
740 ctx->s->thread_index);
746 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
747 u32 max_segs, u8 peek_data)
749 u32 n_bytes_per_buf, n_bytes_per_seg;
750 ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
753 /* Offset in rx fifo from where to peek data */
754 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
755 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
757 ctx->max_len_to_snd = 0;
760 ctx->max_dequeue -= ctx->tx_offset;
764 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
766 if (ctx->max_dequeue <= sizeof (ctx->hdr))
768 ctx->max_len_to_snd = 0;
771 svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
773 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
774 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
777 ASSERT (ctx->max_dequeue > 0);
779 /* Ensure we're not writing more than transport window allows */
780 if (ctx->max_dequeue < ctx->snd_space)
782 /* Constrained by tx queue. Try to send only fully formed segments */
783 ctx->max_len_to_snd =
784 (ctx->max_dequeue > ctx->snd_mss) ?
785 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
790 /* Expectation is that snd_space0 is already a multiple of snd_mss */
791 ctx->max_len_to_snd = ctx->snd_space;
794 /* Check if we're tx constrained by the node */
795 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
796 if (ctx->n_segs_per_evt > max_segs)
798 ctx->n_segs_per_evt = max_segs;
799 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
802 n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
803 ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
804 n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->snd_mss;
805 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
806 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
807 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
809 TRANSPORT_MAX_HDRS_LEN);
813 session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
814 vlib_node_runtime_t * node,
815 session_evt_elt_t * elt,
816 int *n_tx_packets, u8 peek_data)
818 u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
819 session_tx_context_t *ctx = &wrk->ctx;
820 session_main_t *smm = &session_main;
821 session_event_t *e = &elt->evt;
822 vlib_main_t *vm = wrk->vm;
823 transport_proto_t tp;
827 if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
830 session_evt_add_old (wrk, elt);
831 return SESSION_TX_NO_DATA;
834 next_index = smm->session_type_to_next[ctx->s->session_type];
835 max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
837 tp = session_get_transport_proto (ctx->s);
838 ctx->transport_vft = transport_protocol_get_vft (tp);
839 ctx->tc = session_tx_get_transport (ctx, peek_data);
841 if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
843 if (ctx->transport_vft->flush_data)
844 ctx->transport_vft->flush_data (ctx->tc);
845 e->event_type = SESSION_IO_EVT_TX;
848 if (ctx->s->flags & SESSION_F_CUSTOM_TX)
851 ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
852 n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, max_burst);
853 *n_tx_packets += n_custom_tx;
855 (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
856 return SESSION_TX_OK;
857 max_burst -= n_custom_tx;
860 session_evt_add_old (wrk, elt);
861 return SESSION_TX_OK;
865 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
866 if (PREDICT_FALSE (ctx->snd_mss == 0))
868 session_evt_add_old (wrk, elt);
869 return SESSION_TX_NO_DATA;
872 ctx->snd_space = transport_connection_snd_space (ctx->tc, ctx->snd_mss);
874 /* This flow queue is "empty" so it should be re-evaluated before
875 * the ones that have data to send. */
876 if (ctx->snd_space == 0)
878 session_evt_add_head_old (wrk, elt);
879 return SESSION_TX_NO_DATA;
882 /* Allow enqueuing of a new event */
883 svm_fifo_unset_event (ctx->s->tx_fifo);
885 /* Check how much we can pull. */
886 session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
888 if (PREDICT_FALSE (!ctx->max_len_to_snd))
890 transport_connection_tx_pacer_reset_bucket (ctx->tc);
891 return SESSION_TX_NO_DATA;
894 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
895 vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
896 CLIB_CACHE_LINE_BYTES);
897 n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
898 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
901 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
902 if (svm_fifo_set_event (ctx->s->tx_fifo))
903 session_evt_add_head_old (wrk, elt);
904 vlib_node_increment_counter (wrk->vm, node->node_index,
905 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
906 return SESSION_TX_NO_BUFFERS;
909 ctx->left_to_snd = ctx->max_len_to_snd;
910 n_left = ctx->n_segs_per_evt;
914 vlib_buffer_t *b0, *b1;
917 pbi = wrk->tx_buffers[n_bufs - 3];
918 pb = vlib_get_buffer (vm, pbi);
919 vlib_prefetch_buffer_header (pb, STORE);
920 pbi = wrk->tx_buffers[n_bufs - 4];
921 pb = vlib_get_buffer (vm, pbi);
922 vlib_prefetch_buffer_header (pb, STORE);
924 bi0 = wrk->tx_buffers[--n_bufs];
925 bi1 = wrk->tx_buffers[--n_bufs];
927 b0 = vlib_get_buffer (vm, bi0);
928 b1 = vlib_get_buffer (vm, bi1);
930 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
931 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
933 ctx->transport_vft->push_header (ctx->tc, b0);
934 ctx->transport_vft->push_header (ctx->tc, b1);
938 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
939 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
941 vec_add1 (wrk->pending_tx_buffers, bi0);
942 vec_add1 (wrk->pending_tx_buffers, bi1);
943 vec_add1 (wrk->pending_tx_nexts, next_index);
944 vec_add1 (wrk->pending_tx_nexts, next_index);
953 pbi = wrk->tx_buffers[n_bufs - 2];
954 pb = vlib_get_buffer (vm, pbi);
955 vlib_prefetch_buffer_header (pb, STORE);
958 bi0 = wrk->tx_buffers[--n_bufs];
959 b0 = vlib_get_buffer (vm, bi0);
960 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
962 /* Ask transport to push header after current_length and
963 * total_length_not_including_first_buffer are updated */
964 ctx->transport_vft->push_header (ctx->tc, b0);
968 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
970 vec_add1 (wrk->pending_tx_buffers, bi0);
971 vec_add1 (wrk->pending_tx_nexts, next_index);
974 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
975 session_tx_trace_frame (vm, node, next_index, wrk->pending_tx_buffers,
976 ctx->n_segs_per_evt, ctx->s, n_trace);
978 if (PREDICT_FALSE (n_bufs))
979 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
981 *n_tx_packets += ctx->n_segs_per_evt;
982 transport_connection_update_tx_bytes (ctx->tc, ctx->max_len_to_snd);
984 SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
985 ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
987 /* If we couldn't dequeue all bytes mark as partially read */
988 ASSERT (ctx->left_to_snd == 0);
989 if (ctx->max_len_to_snd < ctx->max_dequeue)
990 if (svm_fifo_set_event (ctx->s->tx_fifo))
991 session_evt_add_old (wrk, elt);
994 && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
996 /* Fix dgram pre header */
997 if (ctx->max_len_to_snd < ctx->max_dequeue)
998 svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
999 sizeof (session_dgram_pre_hdr_t));
1000 /* More data needs to be read */
1001 else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
1002 if (svm_fifo_set_event (ctx->s->tx_fifo))
1003 session_evt_add_old (wrk, elt);
1005 if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1006 session_dequeue_notify (ctx->s);
1008 return SESSION_TX_OK;
1012 session_tx_fifo_peek_and_snd (session_worker_t * wrk,
1013 vlib_node_runtime_t * node,
1014 session_evt_elt_t * e, int *n_tx_packets)
1016 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1020 session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
1021 vlib_node_runtime_t * node,
1022 session_evt_elt_t * e, int *n_tx_packets)
1024 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1028 session_tx_fifo_dequeue_internal (session_worker_t * wrk,
1029 vlib_node_runtime_t * node,
1030 session_evt_elt_t * e, int *n_tx_packets)
1032 session_t *s = wrk->ctx.s;
1034 if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1036 svm_fifo_unset_event (s->tx_fifo);
1037 return transport_custom_tx (session_get_transport_proto (s), s,
1038 VLIB_FRAME_SIZE - *n_tx_packets);
1041 always_inline session_t *
1042 session_event_get_session (session_event_t * e, u8 thread_index)
1044 return session_get_if_valid (e->session_index, thread_index);
1048 session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
1050 clib_llist_index_t ei;
1051 void (*fp) (void *);
1055 ei = clib_llist_entry_index (wrk->event_elts, elt);
1058 switch (e->event_type)
1060 case SESSION_CTRL_EVT_RPC:
1061 fp = e->rpc_args.fp;
1062 (*fp) (e->rpc_args.arg);
1064 case SESSION_CTRL_EVT_CLOSE:
1065 s = session_get_from_handle_if_valid (e->session_handle);
1066 if (PREDICT_FALSE (!s))
1068 session_transport_close (s);
1070 case SESSION_CTRL_EVT_RESET:
1071 s = session_get_from_handle_if_valid (e->session_handle);
1072 if (PREDICT_FALSE (!s))
1074 session_transport_reset (s);
1076 case SESSION_CTRL_EVT_LISTEN:
1077 session_mq_listen_handler (session_evt_ctrl_data (wrk, elt));
1079 case SESSION_CTRL_EVT_LISTEN_URI:
1080 session_mq_listen_uri_handler (session_evt_ctrl_data (wrk, elt));
1082 case SESSION_CTRL_EVT_UNLISTEN:
1083 session_mq_unlisten_handler (session_evt_ctrl_data (wrk, elt));
1085 case SESSION_CTRL_EVT_CONNECT:
1086 session_mq_connect_handler (session_evt_ctrl_data (wrk, elt));
1088 case SESSION_CTRL_EVT_CONNECT_URI:
1089 session_mq_connect_uri_handler (session_evt_ctrl_data (wrk, elt));
1091 case SESSION_CTRL_EVT_DISCONNECT:
1092 session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
1094 case SESSION_CTRL_EVT_DISCONNECTED:
1095 session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
1097 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
1098 session_mq_accepted_reply_handler (session_evt_ctrl_data (wrk, elt));
1100 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
1101 session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
1104 case SESSION_CTRL_EVT_RESET_REPLY:
1105 session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
1107 case SESSION_CTRL_EVT_WORKER_UPDATE:
1108 session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
1110 case SESSION_CTRL_EVT_APP_DETACH:
1111 app_mq_detach_handler (session_evt_ctrl_data (wrk, elt));
1114 clib_warning ("unhandled event type %d", e->event_type);
1117 /* Regrab elements in case pool moved */
1118 elt = pool_elt_at_index (wrk->event_elts, ei);
1119 if (!clib_llist_elt_is_linked (elt, evt_list))
1122 if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1123 session_evt_ctrl_data_free (wrk, elt);
1124 session_evt_elt_free (wrk, elt);
1129 session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
1130 session_evt_elt_t * elt, u32 thread_index,
1133 session_main_t *smm = &session_main;
1134 app_worker_t *app_wrk;
1135 clib_llist_index_t ei;
1139 ei = clib_llist_entry_index (wrk->event_elts, elt);
1142 switch (e->event_type)
1144 case SESSION_IO_EVT_TX_FLUSH:
1145 case SESSION_IO_EVT_TX:
1146 s = session_event_get_session (e, thread_index);
1147 if (PREDICT_FALSE (!s))
1149 clib_warning ("session %u was freed!", e->session_index);
1152 CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
1154 /* Spray packets in per session type frames, since they go to
1155 * different nodes */
1156 (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1158 case SESSION_IO_EVT_RX:
1159 s = session_event_get_session (e, thread_index);
1162 transport_app_rx_evt (session_get_transport_proto (s),
1163 s->connection_index, s->thread_index);
1165 case SESSION_IO_EVT_BUILTIN_RX:
1166 s = session_event_get_session (e, thread_index);
1167 if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1169 svm_fifo_unset_event (s->rx_fifo);
1170 app_wrk = app_worker_get (s->app_wrk_index);
1171 app_worker_builtin_rx (app_wrk, s);
1173 case SESSION_IO_EVT_BUILTIN_TX:
1174 s = session_get_from_handle_if_valid (e->session_handle);
1176 if (PREDICT_TRUE (s != 0))
1177 session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1180 clib_warning ("unhandled event type %d", e->event_type);
1183 /* Regrab elements in case pool moved */
1184 elt = pool_elt_at_index (wrk->event_elts, ei);
1185 if (!clib_llist_elt_is_linked (elt, evt_list))
1186 session_evt_elt_free (wrk, elt);
1190 static const u32 session_evt_msg_sizes[] = {
1191 #define _(symc, sym) \
1192 [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1193 foreach_session_ctrl_evt
1199 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1201 session_evt_elt_t *elt;
1203 if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1205 elt = session_evt_alloc_ctrl (wrk);
1206 if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1208 elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1209 elt->evt.event_type = evt->event_type;
1210 clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1211 session_evt_msg_sizes[evt->event_type]);
1215 /* Internal control events fit into io events footprint */
1216 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1221 elt = session_evt_alloc_new (wrk);
1222 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1227 session_flush_pending_tx_buffers (session_worker_t * wrk,
1228 vlib_node_runtime_t * node)
1230 vlib_buffer_enqueue_to_next (wrk->vm, node, wrk->pending_tx_buffers,
1231 wrk->pending_tx_nexts,
1232 vec_len (wrk->pending_tx_nexts));
1233 vec_reset_length (wrk->pending_tx_buffers);
1234 vec_reset_length (wrk->pending_tx_nexts);
1238 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1239 vlib_frame_t * frame)
1241 session_main_t *smm = vnet_get_session_main ();
1242 u32 thread_index = vm->thread_index, n_to_dequeue;
1243 session_worker_t *wrk = &smm->wrk[thread_index];
1244 session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1245 svm_msg_q_msg_t _msg, *msg = &_msg;
1246 clib_llist_index_t old_ti;
1247 int i, n_tx_packets = 0;
1248 session_event_t *evt;
1251 SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1253 wrk->last_vlib_time = vlib_time_now (vm);
1254 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1257 * Update transport time
1259 transport_update_time (wrk->last_vlib_time, thread_index);
1262 * Dequeue and handle new events
1265 /* Try to dequeue what is available. Don't wait for lock.
1266 * XXX: we may need priorities here */
1267 mq = wrk->vpp_event_queue;
1268 n_to_dequeue = svm_msg_q_size (mq);
1269 if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
1271 for (i = 0; i < n_to_dequeue; i++)
1273 svm_msg_q_sub_w_lock (mq, msg);
1274 evt = svm_msg_q_msg_data (mq, msg);
1275 session_evt_add_to_list (wrk, evt);
1276 svm_msg_q_free_msg (mq, msg);
1278 svm_msg_q_unlock (mq);
1282 * Handle control events
1285 ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
1288 clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
1289 clib_llist_remove (wrk->event_elts, evt_list, elt);
1290 session_event_dispatch_ctrl (wrk, elt);
1295 * Handle the new io events.
1298 new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
1299 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1300 old_ti = clib_llist_prev_index (old_he, evt_list);
1303 clib_llist_foreach_safe (wrk->event_elts, evt_list, new_he, elt, ({
1304 session_evt_type_t et;
1306 et = elt->evt.event_type;
1307 clib_llist_remove (wrk->event_elts, evt_list, elt);
1309 /* Postpone tx events if we can't handle them this dispatch cycle */
1310 if (n_tx_packets >= VLIB_FRAME_SIZE
1311 && (et == SESSION_IO_EVT_TX || et == SESSION_IO_EVT_TX_FLUSH))
1313 clib_llist_add (wrk->event_elts, evt_list, elt, new_he);
1317 session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1322 * Handle the old io events, if we had any prior to processing the new ones
1325 if (old_ti != wrk->old_head)
1327 clib_llist_index_t ei, next_ei;
1329 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1330 ei = clib_llist_next_index (old_he, evt_list);
1332 while (n_tx_packets < VLIB_FRAME_SIZE)
1334 elt = pool_elt_at_index (wrk->event_elts, ei);
1335 next_ei = clib_llist_next_index (elt, evt_list);
1336 clib_llist_remove (wrk->event_elts, evt_list, elt);
1338 session_event_dispatch_io (wrk, node, elt, thread_index,
1348 if (vec_len (wrk->pending_tx_buffers))
1349 session_flush_pending_tx_buffers (wrk, node);
1351 vlib_node_increment_counter (vm, session_queue_node.index,
1352 SESSION_QUEUE_ERROR_TX, n_tx_packets);
1354 SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1356 return n_tx_packets;
1360 VLIB_REGISTER_NODE (session_queue_node) =
1362 .function = session_queue_node_fn,
1363 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1364 .name = "session-queue",
1365 .format_trace = format_session_queue_trace,
1366 .type = VLIB_NODE_TYPE_INPUT,
1367 .n_errors = ARRAY_LEN (session_queue_error_strings),
1368 .error_strings = session_queue_error_strings,
1369 .state = VLIB_NODE_STATE_DISABLED,
1374 dump_thread_0_event_queue (void)
1376 session_main_t *smm = vnet_get_session_main ();
1377 vlib_main_t *vm = &vlib_global_main;
1378 u32 my_thread_index = vm->thread_index;
1379 session_event_t _e, *e = &_e;
1380 svm_msg_q_ring_t *ring;
1382 svm_msg_q_msg_t *msg;
1386 mq = smm->wrk[my_thread_index].vpp_event_queue;
1387 index = mq->q->head;
1389 for (i = 0; i < mq->q->cursize; i++)
1391 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1392 ring = svm_msg_q_ring (mq, msg->ring_index);
1393 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1395 switch (e->event_type)
1397 case SESSION_IO_EVT_TX:
1398 s0 = session_event_get_session (e, my_thread_index);
1399 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
1402 case SESSION_CTRL_EVT_CLOSE:
1403 s0 = session_get_from_handle (e->session_handle);
1404 fformat (stdout, "[%04d] disconnect session %d\n", i,
1408 case SESSION_IO_EVT_BUILTIN_RX:
1409 s0 = session_event_get_session (e, my_thread_index);
1410 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
1413 case SESSION_CTRL_EVT_RPC:
1414 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1415 i, (u64) (uword) (e->rpc_args.fp),
1416 (u64) (uword) (e->rpc_args.arg));
1420 fformat (stdout, "[%04d] unhandled event type %d\n",
1427 if (index == mq->q->maxsize)
1433 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1436 switch (e->event_type)
1438 case SESSION_IO_EVT_RX:
1439 case SESSION_IO_EVT_TX:
1440 case SESSION_IO_EVT_BUILTIN_RX:
1441 case SESSION_IO_EVT_BUILTIN_TX:
1442 case SESSION_IO_EVT_TX_FLUSH:
1443 if (e->session_index == f->master_session_index)
1446 case SESSION_CTRL_EVT_CLOSE:
1448 case SESSION_CTRL_EVT_RPC:
1449 s = session_get_from_handle (e->session_handle);
1452 clib_warning ("session has event but doesn't exist!");
1455 if (s->rx_fifo == f || s->tx_fifo == f)
1465 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1467 session_evt_elt_t *elt;
1468 session_worker_t *wrk;
1469 int i, index, found = 0;
1470 svm_msg_q_msg_t *msg;
1471 svm_msg_q_ring_t *ring;
1476 thread_index = f->master_thread_index;
1477 wrk = session_main_get_worker (thread_index);
1482 mq = wrk->vpp_event_queue;
1483 index = mq->q->head;
1484 for (i = 0; i < mq->q->cursize; i++)
1486 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1487 ring = svm_msg_q_ring (mq, msg->ring_index);
1488 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1489 found = session_node_cmp_event (e, f);
1492 index = (index + 1) % mq->q->maxsize;
1495 * Search pending events vector
1499 clib_llist_foreach (wrk->event_elts, evt_list,
1500 pool_elt_at_index (wrk->event_elts, wrk->new_head),
1502 found = session_node_cmp_event (&elt->evt, f);
1505 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1512 clib_llist_foreach (wrk->event_elts, evt_list,
1513 pool_elt_at_index (wrk->event_elts, wrk->old_head),
1515 found = session_node_cmp_event (&elt->evt, f);
1518 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1528 static clib_error_t *
1529 session_queue_exit (vlib_main_t * vm)
1531 if (vec_len (vlib_mains) < 2)
1535 * Shut off (especially) worker-thread session nodes.
1536 * Otherwise, vpp can crash as the main thread unmaps the
1539 vlib_worker_thread_barrier_sync (vm);
1540 session_node_enable_disable (0 /* is_enable */ );
1541 vlib_worker_thread_barrier_release (vm);
1545 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1548 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1551 f64 now, timeout = 1.0;
1552 uword *event_data = 0;
1557 vlib_process_wait_for_event_or_clock (vm, timeout);
1558 now = vlib_time_now (vm);
1559 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1563 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1564 /* Flush the frames by updating all transports times */
1565 transport_update_time (now, 0);
1567 case SESSION_Q_PROCESS_STOP:
1571 /* Timed out. Update time for all transports to trigger all
1572 * outstanding retransmits. */
1573 transport_update_time (now, 0);
1576 vec_reset_length (event_data);
1582 VLIB_REGISTER_NODE (session_queue_process_node) =
1584 .function = session_queue_process,
1585 .type = VLIB_NODE_TYPE_PROCESS,
1586 .name = "session-queue-process",
1587 .state = VLIB_NODE_STATE_DISABLED,
1591 static_always_inline uword
1592 session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1593 vlib_frame_t * frame)
1595 session_main_t *sm = &session_main;
1596 if (!sm->wrk[0].vpp_event_queue)
1598 return session_queue_node_fn (vm, node, frame);
1602 VLIB_REGISTER_NODE (session_queue_pre_input_node) =
1604 .function = session_queue_pre_input_inline,
1605 .type = VLIB_NODE_TYPE_PRE_INPUT,
1606 .name = "session-queue-main",
1607 .state = VLIB_NODE_STATE_DISABLED,
1612 * fd.io coding-style-patch-verification: ON
1615 * eval: (c-set-style "gnu")