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));
54 ip46_address_mask_ip4 (&a->sep.ip);
55 a->sep.port = mp->port;
56 a->sep.fib_index = mp->vrf;
57 a->sep.sw_if_index = ENDPOINT_INVALID_INDEX;
58 a->sep.transport_proto = mp->proto;
59 a->sep_ext.ckpair_index = mp->ckpair_index;
60 a->sep_ext.crypto_engine = mp->crypto_engine;
61 a->app_index = app->app_index;
62 a->wrk_map_index = mp->wrk_index;
64 if ((rv = vnet_listen (a)))
65 clib_warning ("listen returned: %d", rv);
67 app_wrk = application_get_worker (app, mp->wrk_index);
68 mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
73 session_mq_listen_uri_handler (void *data)
75 session_listen_uri_msg_t *mp = (session_listen_uri_msg_t *) data;
76 vnet_listen_args_t _a, *a = &_a;
77 app_worker_t *app_wrk;
81 app_check_thread_and_barrier (session_mq_listen_uri_handler, mp);
83 app = application_lookup (mp->client_index);
87 clib_memset (a, 0, sizeof (*a));
88 a->uri = (char *) mp->uri;
89 a->app_index = app->app_index;
90 rv = vnet_bind_uri (a);
92 app_wrk = application_get_worker (app, 0);
93 mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
97 session_mq_connect_handler (void *data)
99 session_connect_msg_t *mp = (session_connect_msg_t *) data;
100 vnet_connect_args_t _a, *a = &_a;
101 app_worker_t *app_wrk;
105 app_check_thread_and_barrier (session_mq_connect_handler, mp);
107 app = application_lookup (mp->client_index);
111 clib_memset (a, 0, sizeof (*a));
112 a->sep.is_ip4 = mp->is_ip4;
113 clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
114 a->sep.port = mp->port;
115 a->sep.transport_proto = mp->proto;
116 a->sep.peer.fib_index = mp->vrf;
117 clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip));
120 ip46_address_mask_ip4 (&a->sep.ip);
121 ip46_address_mask_ip4 (&a->sep.peer.ip);
123 a->sep.peer.port = mp->lcl_port;
124 a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
125 a->sep_ext.parent_handle = mp->parent_handle;
126 a->sep_ext.ckpair_index = mp->ckpair_index;
127 a->sep_ext.crypto_engine = mp->crypto_engine;
128 a->sep_ext.flags = mp->flags;
129 if (mp->hostname_len)
131 vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
132 clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
134 a->api_context = mp->context;
135 a->app_index = app->app_index;
136 a->wrk_map_index = mp->wrk_index;
138 if ((rv = vnet_connect (a)))
140 clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
141 app_wrk = application_get_worker (app, mp->wrk_index);
142 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
146 vec_free (a->sep_ext.hostname);
150 session_mq_connect_uri_handler (void *data)
152 session_connect_uri_msg_t *mp = (session_connect_uri_msg_t *) data;
153 vnet_connect_args_t _a, *a = &_a;
154 app_worker_t *app_wrk;
158 app_check_thread_and_barrier (session_mq_connect_uri_handler, mp);
160 app = application_lookup (mp->client_index);
164 clib_memset (a, 0, sizeof (*a));
165 a->uri = (char *) mp->uri;
166 a->api_context = mp->context;
167 a->app_index = app->app_index;
168 if ((rv = vnet_connect_uri (a)))
170 clib_warning ("connect_uri returned: %d", rv);
171 app_wrk = application_get_worker (app, 0 /* default wrk only */ );
172 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
178 session_mq_disconnect_handler (void *data)
180 session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
181 vnet_disconnect_args_t _a, *a = &_a;
184 app = application_lookup (mp->client_index);
188 a->app_index = app->app_index;
189 a->handle = mp->handle;
190 vnet_disconnect_session (a);
194 app_mq_detach_handler (void *data)
196 session_app_detach_msg_t *mp = (session_app_detach_msg_t *) data;
197 vnet_app_detach_args_t _a, *a = &_a;
200 app_check_thread_and_barrier (app_mq_detach_handler, mp);
202 app = application_lookup (mp->client_index);
206 a->app_index = app->app_index;
207 a->api_client_index = mp->client_index;
208 vnet_application_detach (a);
212 session_mq_unlisten_handler (void *data)
214 session_unlisten_msg_t *mp = (session_unlisten_msg_t *) data;
215 vnet_unlisten_args_t _a, *a = &_a;
216 app_worker_t *app_wrk;
220 app_check_thread_and_barrier (session_mq_unlisten_handler, mp);
222 app = application_lookup (mp->client_index);
226 clib_memset (a, 0, sizeof (*a));
227 a->app_index = app->app_index;
228 a->handle = mp->handle;
229 a->wrk_map_index = mp->wrk_index;
230 if ((rv = vnet_unlisten (a)))
231 clib_warning ("unlisten returned: %d", rv);
233 app_wrk = application_get_worker (app, a->wrk_map_index);
237 mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
241 session_mq_accepted_reply_handler (void *data)
243 session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
244 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
245 session_state_t old_state;
246 app_worker_t *app_wrk;
249 /* Server isn't interested, kill the session */
252 a->app_index = mp->context;
253 a->handle = mp->handle;
254 vnet_disconnect_session (a);
258 /* Mail this back from the main thread. We're not polling in main
259 * thread so we're using other workers for notifications. */
260 if (vlib_num_workers () && vlib_get_thread_index () != 0
261 && session_thread_from_handle (mp->handle) == 0)
263 vlib_rpc_call_main_thread (session_mq_accepted_reply_handler,
264 (u8 *) mp, sizeof (*mp));
268 s = session_get_from_handle_if_valid (mp->handle);
272 app_wrk = app_worker_get (s->app_wrk_index);
273 if (app_wrk->app_index != mp->context)
275 clib_warning ("app doesn't own session");
279 if (!session_has_transport (s))
281 s->session_state = SESSION_STATE_READY;
282 if (ct_session_connect_notify (s))
287 old_state = s->session_state;
288 s->session_state = SESSION_STATE_READY;
290 if (!svm_fifo_is_empty_prod (s->rx_fifo))
291 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
293 /* Closed while waiting for app to reply. Resend disconnect */
294 if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
296 app_worker_close_notify (app_wrk, s);
297 s->session_state = old_state;
304 session_mq_reset_reply_handler (void *data)
306 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
307 session_reset_reply_msg_t *mp;
308 app_worker_t *app_wrk;
311 u32 index, thread_index;
313 mp = (session_reset_reply_msg_t *) data;
314 app = application_lookup (mp->context);
318 session_parse_handle (mp->handle, &index, &thread_index);
319 s = session_get_if_valid (index, thread_index);
321 /* No session or not the right session */
322 if (!s || s->session_state < SESSION_STATE_TRANSPORT_CLOSING)
325 app_wrk = app_worker_get (s->app_wrk_index);
326 if (!app_wrk || app_wrk->app_index != app->app_index)
328 clib_warning ("App %u does not own handle 0x%lx!", app->app_index,
333 /* Client objected to resetting the session, log and continue */
336 clib_warning ("client retval %d", mp->retval);
340 /* This comes as a response to a reset, transport only waiting for
341 * confirmation to remove connection state, no need to disconnect */
342 a->handle = mp->handle;
343 a->app_index = app->app_index;
344 vnet_disconnect_session (a);
348 session_mq_disconnected_handler (void *data)
350 session_disconnected_reply_msg_t *rmp;
351 vnet_disconnect_args_t _a, *a = &_a;
352 svm_msg_q_msg_t _msg, *msg = &_msg;
353 session_disconnected_msg_t *mp;
354 app_worker_t *app_wrk;
355 session_event_t *evt;
360 mp = (session_disconnected_msg_t *) data;
361 if (!(s = session_get_from_handle_if_valid (mp->handle)))
363 clib_warning ("could not disconnect handle %llu", mp->handle);
366 app_wrk = app_worker_get (s->app_wrk_index);
367 app = application_lookup (mp->client_index);
368 if (!(app_wrk && app && app->app_index == app_wrk->app_index))
370 clib_warning ("could not disconnect session: %llu app: %u",
371 mp->handle, mp->client_index);
375 a->handle = mp->handle;
376 a->app_index = app_wrk->wrk_index;
377 rv = vnet_disconnect_session (a);
379 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
380 SESSION_MQ_CTRL_EVT_RING,
382 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
383 clib_memset (evt, 0, sizeof (*evt));
384 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
385 rmp = (session_disconnected_reply_msg_t *) evt->data;
386 rmp->handle = mp->handle;
387 rmp->context = mp->context;
389 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
393 session_mq_disconnected_reply_handler (void *data)
395 session_disconnected_reply_msg_t *mp;
396 vnet_disconnect_args_t _a, *a = &_a;
399 mp = (session_disconnected_reply_msg_t *) data;
401 /* Client objected to disconnecting the session, log and continue */
404 clib_warning ("client retval %d", mp->retval);
408 /* Disconnect has been confirmed. Confirm close to transport */
409 app = application_lookup (mp->context);
412 a->handle = mp->handle;
413 a->app_index = app->app_index;
414 vnet_disconnect_session (a);
419 session_mq_worker_update_handler (void *data)
421 session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
422 session_worker_update_reply_msg_t *rmp;
423 svm_msg_q_msg_t _msg, *msg = &_msg;
424 app_worker_t *app_wrk;
425 u32 owner_app_wrk_map;
426 session_event_t *evt;
430 app = application_lookup (mp->client_index);
433 if (!(s = session_get_from_handle_if_valid (mp->handle)))
435 clib_warning ("invalid handle %llu", mp->handle);
438 app_wrk = app_worker_get (s->app_wrk_index);
439 if (app_wrk->app_index != app->app_index)
441 clib_warning ("app %u does not own session %llu", app->app_index,
445 owner_app_wrk_map = app_wrk->wrk_map_index;
446 app_wrk = application_get_worker (app, mp->wrk_index);
448 /* This needs to come from the new owner */
449 if (mp->req_wrk_index == owner_app_wrk_map)
451 session_req_worker_update_msg_t *wump;
453 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
454 SESSION_MQ_CTRL_EVT_RING,
456 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
457 clib_memset (evt, 0, sizeof (*evt));
458 evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
459 wump = (session_req_worker_update_msg_t *) evt->data;
460 wump->session_handle = mp->handle;
461 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
465 app_worker_own_session (app_wrk, s);
470 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
471 SESSION_MQ_CTRL_EVT_RING,
473 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
474 clib_memset (evt, 0, sizeof (*evt));
475 evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
476 rmp = (session_worker_update_reply_msg_t *) evt->data;
477 rmp->handle = mp->handle;
478 rmp->rx_fifo = pointer_to_uword (s->rx_fifo);
479 rmp->tx_fifo = pointer_to_uword (s->tx_fifo);
480 rmp->segment_handle = session_segment_handle (s);
481 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
484 * Retransmit messages that may have been lost
486 if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
487 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
489 if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
490 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
492 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
493 app_worker_close_notify (app_wrk, s);
496 vlib_node_registration_t session_queue_node;
501 u32 server_thread_index;
502 } session_queue_trace_t;
504 /* packet trace format function */
506 format_session_queue_trace (u8 * s, va_list * args)
508 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
509 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
510 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
512 s = format (s, "session index %d thread index %d",
513 t->session_index, t->server_thread_index);
517 #define foreach_session_queue_error \
518 _(TX, "Packets transmitted") \
519 _(TIMER, "Timer events") \
520 _(NO_BUFFER, "Out of buffers")
524 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
525 foreach_session_queue_error
527 SESSION_QUEUE_N_ERROR,
528 } session_queue_error_t;
530 static char *session_queue_error_strings[] = {
531 #define _(sym,string) string,
532 foreach_session_queue_error
538 SESSION_TX_NO_BUFFERS = -2,
544 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
545 u32 next_index, u32 * to_next, u16 n_segs,
546 session_t * s, u32 n_trace)
548 session_queue_trace_t *t;
552 for (i = 0; i < clib_min (n_trace, n_segs); i++)
554 b = vlib_get_buffer (vm, to_next[i]);
555 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
556 t = vlib_add_trace (vm, node, b, sizeof (*t));
557 t->session_index = s->session_index;
558 t->server_thread_index = s->thread_index;
560 vlib_set_trace_count (vm, node, n_trace - i);
564 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
565 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
567 vlib_buffer_t *chain_b, *prev_b;
568 u32 chain_bi0, to_deq, left_from_seg;
569 session_worker_t *wrk;
570 u16 len_to_deq, n_bytes_read;
573 wrk = session_main_get_worker (ctx->s->thread_index);
574 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
575 b->total_length_not_including_first_buffer = 0;
578 left_from_seg = clib_min (ctx->sp.snd_mss - b->current_length,
580 to_deq = left_from_seg;
581 for (j = 1; j < ctx->n_bufs_per_seg; j++)
584 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
587 chain_bi0 = wrk->tx_buffers[*n_bufs];
588 chain_b = vlib_get_buffer (vm, chain_bi0);
589 chain_b->current_data = 0;
590 data = vlib_buffer_get_current (chain_b);
593 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
594 ctx->sp.tx_offset, len_to_deq, data);
595 ctx->sp.tx_offset += n_bytes_read;
599 if (ctx->transport_vft->transport_options.tx_type ==
602 svm_fifo_t *f = ctx->s->tx_fifo;
603 session_dgram_hdr_t *hdr = &ctx->hdr;
605 deq_now = clib_min (hdr->data_length - hdr->data_offset,
607 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
609 ASSERT (n_bytes_read > 0);
611 hdr->data_offset += n_bytes_read;
612 if (hdr->data_offset == hdr->data_length)
614 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
615 svm_fifo_dequeue_drop (f, offset);
619 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
622 ASSERT (n_bytes_read == len_to_deq);
623 chain_b->current_length = n_bytes_read;
624 b->total_length_not_including_first_buffer += chain_b->current_length;
626 /* update previous buffer */
627 prev_b->next_buffer = chain_bi0;
628 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
630 /* update current buffer */
631 chain_b->next_buffer = 0;
633 to_deq -= n_bytes_read;
638 && b->total_length_not_including_first_buffer == left_from_seg);
639 ctx->left_to_snd -= left_from_seg;
643 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
644 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
651 * Start with the first buffer in chain
654 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
657 data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
658 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
662 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset,
664 ASSERT (n_bytes_read > 0);
665 /* Keep track of progress locally, transport is also supposed to
666 * increment it independently when pushing the header */
667 ctx->sp.tx_offset += n_bytes_read;
671 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
673 session_dgram_hdr_t *hdr = &ctx->hdr;
674 svm_fifo_t *f = ctx->s->tx_fifo;
678 ASSERT (hdr->data_length > hdr->data_offset);
679 deq_now = clib_min (hdr->data_length - hdr->data_offset,
681 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
682 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
683 ASSERT (n_bytes_read > 0);
685 if (ctx->s->session_state == SESSION_STATE_LISTENING)
687 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
688 ctx->tc->rmt_port = hdr->rmt_port;
690 hdr->data_offset += n_bytes_read;
691 if (hdr->data_offset == hdr->data_length)
693 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
694 svm_fifo_dequeue_drop (f, offset);
699 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
701 ASSERT (n_bytes_read > 0);
704 b->current_length = n_bytes_read;
705 ctx->left_to_snd -= n_bytes_read;
708 * Fill in the remaining buffers in the chain, if any
710 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
711 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
715 session_tx_not_ready (session_t * s, u8 peek_data)
719 if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
721 /* Can retransmit for closed sessions but can't send new data if
722 * session is not ready or closed */
723 else if (s->session_state < SESSION_STATE_READY)
725 else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
727 /* Allow closed transports to still send custom packets.
728 * For instance, tcp may want to send acks in time-wait. */
729 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
730 && (s->flags & SESSION_F_CUSTOM_TX))
738 always_inline transport_connection_t *
739 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
743 return ctx->transport_vft->get_connection (ctx->s->connection_index,
744 ctx->s->thread_index);
748 if (ctx->s->session_state == SESSION_STATE_LISTENING)
749 return ctx->transport_vft->get_listener (ctx->s->connection_index);
752 return ctx->transport_vft->get_connection (ctx->s->connection_index,
753 ctx->s->thread_index);
759 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
760 u32 max_segs, u8 peek_data)
762 u32 n_bytes_per_buf, n_bytes_per_seg;
763 ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
766 /* Offset in rx fifo from where to peek data */
767 if (PREDICT_FALSE (ctx->sp.tx_offset >= ctx->max_dequeue))
769 ctx->max_len_to_snd = 0;
772 ctx->max_dequeue -= ctx->sp.tx_offset;
776 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
778 if (ctx->max_dequeue <= sizeof (ctx->hdr))
780 ctx->max_len_to_snd = 0;
783 svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
785 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
786 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
789 ASSERT (ctx->max_dequeue > 0);
791 /* Ensure we're not writing more than transport window allows */
792 if (ctx->max_dequeue < ctx->sp.snd_space)
794 /* Constrained by tx queue. Try to send only fully formed segments */
795 ctx->max_len_to_snd = (ctx->max_dequeue > ctx->sp.snd_mss) ?
796 (ctx->max_dequeue - (ctx->max_dequeue % ctx->sp.snd_mss)) :
802 /* Expectation is that snd_space0 is already a multiple of snd_mss */
803 ctx->max_len_to_snd = ctx->sp.snd_space;
806 /* Check if we're tx constrained by the node */
807 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->sp.snd_mss);
808 if (ctx->n_segs_per_evt > max_segs)
810 ctx->n_segs_per_evt = max_segs;
811 ctx->max_len_to_snd = max_segs * ctx->sp.snd_mss;
814 n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
815 ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
816 n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->sp.snd_mss;
817 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
818 ctx->deq_per_buf = clib_min (ctx->sp.snd_mss, n_bytes_per_buf);
819 ctx->deq_per_first_buf = clib_min (ctx->sp.snd_mss,
821 TRANSPORT_MAX_HDRS_LEN);
825 session_tx_maybe_reschedule (session_worker_t * wrk,
826 session_tx_context_t * ctx,
827 session_evt_elt_t * elt)
829 session_t *s = ctx->s;
831 svm_fifo_unset_event (s->tx_fifo);
832 if (svm_fifo_max_dequeue_cons (s->tx_fifo) > ctx->sp.tx_offset)
833 if (svm_fifo_set_event (s->tx_fifo))
834 session_evt_add_head_old (wrk, elt);
838 session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
839 vlib_node_runtime_t * node,
840 session_evt_elt_t * elt,
841 int *n_tx_packets, u8 peek_data)
843 u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
844 session_tx_context_t *ctx = &wrk->ctx;
845 session_main_t *smm = &session_main;
846 session_event_t *e = &elt->evt;
847 vlib_main_t *vm = wrk->vm;
848 transport_proto_t tp;
852 if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
855 session_evt_add_old (wrk, elt);
856 return SESSION_TX_NO_DATA;
859 next_index = smm->session_type_to_next[ctx->s->session_type];
860 max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
862 tp = session_get_transport_proto (ctx->s);
863 ctx->transport_vft = transport_protocol_get_vft (tp);
864 ctx->tc = session_tx_get_transport (ctx, peek_data);
866 if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
868 if (ctx->transport_vft->flush_data)
869 ctx->transport_vft->flush_data (ctx->tc);
870 e->event_type = SESSION_IO_EVT_TX;
873 if (ctx->s->flags & SESSION_F_CUSTOM_TX)
876 ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
877 n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, max_burst);
878 *n_tx_packets += n_custom_tx;
880 (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
881 return SESSION_TX_OK;
882 max_burst -= n_custom_tx;
883 if (!max_burst || (ctx->s->flags & SESSION_F_CUSTOM_TX))
885 session_evt_add_old (wrk, elt);
886 return SESSION_TX_OK;
890 transport_connection_snd_params (ctx->tc, &ctx->sp);
892 if (!ctx->sp.snd_space)
894 /* If the deschedule flag was set, remove session from scheduler.
895 * Transport is responsible for rescheduling this session. */
896 if (ctx->sp.flags & TRANSPORT_SND_F_DESCHED)
897 transport_connection_deschedule (ctx->tc);
898 /* Request to postpone the session, e.g., zero-wnd and transport
899 * is not currently probing */
900 else if (ctx->sp.flags & TRANSPORT_SND_F_POSTPONE)
901 session_evt_add_old (wrk, elt);
902 /* This flow queue is "empty" so it should be re-evaluated before
903 * the ones that have data to send. */
905 session_evt_add_head_old (wrk, elt);
907 return SESSION_TX_NO_DATA;
910 if (transport_connection_is_tx_paced (ctx->tc))
912 u32 snd_space = transport_connection_tx_pacer_burst (ctx->tc);
913 if (snd_space < TRANSPORT_PACER_MIN_BURST)
915 session_evt_add_head_old (wrk, elt);
916 return SESSION_TX_NO_DATA;
918 snd_space = clib_min (ctx->sp.snd_space, snd_space);
919 ctx->sp.snd_space = snd_space >= ctx->sp.snd_mss ?
920 snd_space - snd_space % ctx->sp.snd_mss : snd_space;
923 /* Check how much we can pull. */
924 session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
926 if (PREDICT_FALSE (!ctx->max_len_to_snd))
928 transport_connection_tx_pacer_reset_bucket (ctx->tc, 0);
929 session_tx_maybe_reschedule (wrk, ctx, elt);
930 return SESSION_TX_NO_DATA;
933 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
934 vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
935 CLIB_CACHE_LINE_BYTES);
936 n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
937 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
940 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
941 session_evt_add_head_old (wrk, elt);
942 vlib_node_increment_counter (wrk->vm, node->node_index,
943 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
944 return SESSION_TX_NO_BUFFERS;
947 ctx->left_to_snd = ctx->max_len_to_snd;
948 n_left = ctx->n_segs_per_evt;
952 vlib_buffer_t *b0, *b1;
955 pbi = wrk->tx_buffers[n_bufs - 3];
956 pb = vlib_get_buffer (vm, pbi);
957 vlib_prefetch_buffer_header (pb, STORE);
958 pbi = wrk->tx_buffers[n_bufs - 4];
959 pb = vlib_get_buffer (vm, pbi);
960 vlib_prefetch_buffer_header (pb, STORE);
962 bi0 = wrk->tx_buffers[--n_bufs];
963 bi1 = wrk->tx_buffers[--n_bufs];
965 b0 = vlib_get_buffer (vm, bi0);
966 b1 = vlib_get_buffer (vm, bi1);
968 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
969 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
971 ctx->transport_vft->push_header (ctx->tc, b0);
972 ctx->transport_vft->push_header (ctx->tc, b1);
976 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
977 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
979 vec_add1 (wrk->pending_tx_buffers, bi0);
980 vec_add1 (wrk->pending_tx_buffers, bi1);
981 vec_add1 (wrk->pending_tx_nexts, next_index);
982 vec_add1 (wrk->pending_tx_nexts, next_index);
991 pbi = wrk->tx_buffers[n_bufs - 2];
992 pb = vlib_get_buffer (vm, pbi);
993 vlib_prefetch_buffer_header (pb, STORE);
996 bi0 = wrk->tx_buffers[--n_bufs];
997 b0 = vlib_get_buffer (vm, bi0);
998 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
1000 /* Ask transport to push header after current_length and
1001 * total_length_not_including_first_buffer are updated */
1002 ctx->transport_vft->push_header (ctx->tc, b0);
1006 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
1008 vec_add1 (wrk->pending_tx_buffers, bi0);
1009 vec_add1 (wrk->pending_tx_nexts, next_index);
1012 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
1013 session_tx_trace_frame (vm, node, next_index, wrk->pending_tx_buffers,
1014 ctx->n_segs_per_evt, ctx->s, n_trace);
1016 if (PREDICT_FALSE (n_bufs))
1017 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
1019 *n_tx_packets += ctx->n_segs_per_evt;
1020 transport_connection_update_tx_bytes (ctx->tc, ctx->max_len_to_snd);
1022 SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
1023 ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
1025 ASSERT (ctx->left_to_snd == 0);
1027 /* If we couldn't dequeue all bytes reschedule as old flow. Otherwise,
1028 * check if application enqueued more data and reschedule accordingly */
1029 if (ctx->max_len_to_snd < ctx->max_dequeue)
1030 session_evt_add_old (wrk, elt);
1032 session_tx_maybe_reschedule (wrk, ctx, elt);
1035 && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
1037 /* Fix dgram pre header */
1038 if (ctx->max_len_to_snd < ctx->max_dequeue)
1039 svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
1040 sizeof (session_dgram_pre_hdr_t));
1041 /* More data needs to be read */
1042 else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
1043 if (svm_fifo_set_event (ctx->s->tx_fifo))
1044 session_evt_add_old (wrk, elt);
1046 if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1047 session_dequeue_notify (ctx->s);
1049 return SESSION_TX_OK;
1053 session_tx_fifo_peek_and_snd (session_worker_t * wrk,
1054 vlib_node_runtime_t * node,
1055 session_evt_elt_t * e, int *n_tx_packets)
1057 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1061 session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
1062 vlib_node_runtime_t * node,
1063 session_evt_elt_t * e, int *n_tx_packets)
1065 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1069 session_tx_fifo_dequeue_internal (session_worker_t * wrk,
1070 vlib_node_runtime_t * node,
1071 session_evt_elt_t * e, int *n_tx_packets)
1073 session_t *s = wrk->ctx.s;
1075 if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1077 svm_fifo_unset_event (s->tx_fifo);
1078 return transport_custom_tx (session_get_transport_proto (s), s,
1079 VLIB_FRAME_SIZE - *n_tx_packets);
1082 always_inline session_t *
1083 session_event_get_session (session_event_t * e, u8 thread_index)
1085 return session_get_if_valid (e->session_index, thread_index);
1089 session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
1091 clib_llist_index_t ei;
1092 void (*fp) (void *);
1096 ei = clib_llist_entry_index (wrk->event_elts, elt);
1099 switch (e->event_type)
1101 case SESSION_CTRL_EVT_RPC:
1102 fp = e->rpc_args.fp;
1103 (*fp) (e->rpc_args.arg);
1105 case SESSION_CTRL_EVT_CLOSE:
1106 s = session_get_from_handle_if_valid (e->session_handle);
1107 if (PREDICT_FALSE (!s))
1109 session_transport_close (s);
1111 case SESSION_CTRL_EVT_RESET:
1112 s = session_get_from_handle_if_valid (e->session_handle);
1113 if (PREDICT_FALSE (!s))
1115 session_transport_reset (s);
1117 case SESSION_CTRL_EVT_LISTEN:
1118 session_mq_listen_handler (session_evt_ctrl_data (wrk, elt));
1120 case SESSION_CTRL_EVT_LISTEN_URI:
1121 session_mq_listen_uri_handler (session_evt_ctrl_data (wrk, elt));
1123 case SESSION_CTRL_EVT_UNLISTEN:
1124 session_mq_unlisten_handler (session_evt_ctrl_data (wrk, elt));
1126 case SESSION_CTRL_EVT_CONNECT:
1127 session_mq_connect_handler (session_evt_ctrl_data (wrk, elt));
1129 case SESSION_CTRL_EVT_CONNECT_URI:
1130 session_mq_connect_uri_handler (session_evt_ctrl_data (wrk, elt));
1132 case SESSION_CTRL_EVT_DISCONNECT:
1133 session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
1135 case SESSION_CTRL_EVT_DISCONNECTED:
1136 session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
1138 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
1139 session_mq_accepted_reply_handler (session_evt_ctrl_data (wrk, elt));
1141 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
1142 session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
1145 case SESSION_CTRL_EVT_RESET_REPLY:
1146 session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
1148 case SESSION_CTRL_EVT_WORKER_UPDATE:
1149 session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
1151 case SESSION_CTRL_EVT_APP_DETACH:
1152 app_mq_detach_handler (session_evt_ctrl_data (wrk, elt));
1155 clib_warning ("unhandled event type %d", e->event_type);
1158 /* Regrab elements in case pool moved */
1159 elt = pool_elt_at_index (wrk->event_elts, ei);
1160 if (!clib_llist_elt_is_linked (elt, evt_list))
1163 if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1164 session_evt_ctrl_data_free (wrk, elt);
1165 session_evt_elt_free (wrk, elt);
1170 session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
1171 session_evt_elt_t * elt, u32 thread_index,
1174 session_main_t *smm = &session_main;
1175 app_worker_t *app_wrk;
1176 clib_llist_index_t ei;
1180 ei = clib_llist_entry_index (wrk->event_elts, elt);
1183 switch (e->event_type)
1185 case SESSION_IO_EVT_TX_FLUSH:
1186 case SESSION_IO_EVT_TX:
1187 s = session_event_get_session (e, thread_index);
1188 if (PREDICT_FALSE (!s))
1190 CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
1192 /* Spray packets in per session type frames, since they go to
1193 * different nodes */
1194 (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1196 case SESSION_IO_EVT_RX:
1197 s = session_event_get_session (e, thread_index);
1200 transport_app_rx_evt (session_get_transport_proto (s),
1201 s->connection_index, s->thread_index);
1203 case SESSION_IO_EVT_BUILTIN_RX:
1204 s = session_event_get_session (e, thread_index);
1205 if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1207 svm_fifo_unset_event (s->rx_fifo);
1208 app_wrk = app_worker_get (s->app_wrk_index);
1209 app_worker_builtin_rx (app_wrk, s);
1211 case SESSION_IO_EVT_BUILTIN_TX:
1212 s = session_get_from_handle_if_valid (e->session_handle);
1214 if (PREDICT_TRUE (s != 0))
1215 session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1218 clib_warning ("unhandled event type %d", e->event_type);
1221 /* Regrab elements in case pool moved */
1222 elt = pool_elt_at_index (wrk->event_elts, ei);
1223 if (!clib_llist_elt_is_linked (elt, evt_list))
1224 session_evt_elt_free (wrk, elt);
1228 static const u32 session_evt_msg_sizes[] = {
1229 #define _(symc, sym) \
1230 [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1231 foreach_session_ctrl_evt
1237 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1239 session_evt_elt_t *elt;
1241 if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1243 elt = session_evt_alloc_ctrl (wrk);
1244 if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1246 elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1247 elt->evt.event_type = evt->event_type;
1248 clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1249 session_evt_msg_sizes[evt->event_type]);
1253 /* Internal control events fit into io events footprint */
1254 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1259 elt = session_evt_alloc_new (wrk);
1260 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1265 session_flush_pending_tx_buffers (session_worker_t * wrk,
1266 vlib_node_runtime_t * node)
1268 vlib_buffer_enqueue_to_next (wrk->vm, node, wrk->pending_tx_buffers,
1269 wrk->pending_tx_nexts,
1270 vec_len (wrk->pending_tx_nexts));
1271 vec_reset_length (wrk->pending_tx_buffers);
1272 vec_reset_length (wrk->pending_tx_nexts);
1276 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1277 vlib_frame_t * frame)
1279 session_main_t *smm = vnet_get_session_main ();
1280 u32 thread_index = vm->thread_index, n_to_dequeue;
1281 session_worker_t *wrk = &smm->wrk[thread_index];
1282 session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1283 clib_llist_index_t ei, next_ei, old_ti;
1284 svm_msg_q_msg_t _msg, *msg = &_msg;
1285 int i, n_tx_packets;
1286 session_event_t *evt;
1289 SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1291 wrk->last_vlib_time = vlib_time_now (vm);
1292 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1295 * Update transport time
1297 transport_update_time (wrk->last_vlib_time, thread_index);
1298 n_tx_packets = vec_len (wrk->pending_tx_buffers);
1301 * Dequeue and handle new events
1304 /* Try to dequeue what is available. Don't wait for lock.
1305 * XXX: we may need priorities here */
1306 mq = wrk->vpp_event_queue;
1307 n_to_dequeue = svm_msg_q_size (mq);
1308 if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
1310 for (i = 0; i < n_to_dequeue; i++)
1312 svm_msg_q_sub_w_lock (mq, msg);
1313 evt = svm_msg_q_msg_data (mq, msg);
1314 session_evt_add_to_list (wrk, evt);
1315 svm_msg_q_free_msg (mq, msg);
1317 svm_msg_q_unlock (mq);
1321 * Handle control events
1324 ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
1327 clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
1328 clib_llist_remove (wrk->event_elts, evt_list, elt);
1329 session_event_dispatch_ctrl (wrk, elt);
1334 * Handle the new io events.
1337 new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
1338 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1339 old_ti = clib_llist_prev_index (old_he, evt_list);
1341 ei = clib_llist_next_index (new_he, evt_list);
1342 while (ei != wrk->new_head && n_tx_packets < VLIB_FRAME_SIZE)
1344 elt = pool_elt_at_index (wrk->event_elts, ei);
1345 ei = clib_llist_next_index (elt, evt_list);
1346 clib_llist_remove (wrk->event_elts, evt_list, elt);
1347 session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1351 * Handle the old io events, if we had any prior to processing the new ones
1354 if (old_ti != wrk->old_head)
1356 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1357 ei = clib_llist_next_index (old_he, evt_list);
1359 while (n_tx_packets < VLIB_FRAME_SIZE)
1361 elt = pool_elt_at_index (wrk->event_elts, ei);
1362 next_ei = clib_llist_next_index (elt, evt_list);
1363 clib_llist_remove (wrk->event_elts, evt_list, elt);
1365 session_event_dispatch_io (wrk, node, elt, thread_index,
1375 if (vec_len (wrk->pending_tx_buffers))
1376 session_flush_pending_tx_buffers (wrk, node);
1378 vlib_node_increment_counter (vm, session_queue_node.index,
1379 SESSION_QUEUE_ERROR_TX, n_tx_packets);
1381 SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1383 return n_tx_packets;
1387 VLIB_REGISTER_NODE (session_queue_node) =
1389 .function = session_queue_node_fn,
1390 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1391 .name = "session-queue",
1392 .format_trace = format_session_queue_trace,
1393 .type = VLIB_NODE_TYPE_INPUT,
1394 .n_errors = ARRAY_LEN (session_queue_error_strings),
1395 .error_strings = session_queue_error_strings,
1396 .state = VLIB_NODE_STATE_DISABLED,
1401 dump_thread_0_event_queue (void)
1403 session_main_t *smm = vnet_get_session_main ();
1404 vlib_main_t *vm = &vlib_global_main;
1405 u32 my_thread_index = vm->thread_index;
1406 session_event_t _e, *e = &_e;
1407 svm_msg_q_ring_t *ring;
1409 svm_msg_q_msg_t *msg;
1413 mq = smm->wrk[my_thread_index].vpp_event_queue;
1414 index = mq->q->head;
1416 for (i = 0; i < mq->q->cursize; i++)
1418 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1419 ring = svm_msg_q_ring (mq, msg->ring_index);
1420 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1422 switch (e->event_type)
1424 case SESSION_IO_EVT_TX:
1425 s0 = session_event_get_session (e, my_thread_index);
1426 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
1429 case SESSION_CTRL_EVT_CLOSE:
1430 s0 = session_get_from_handle (e->session_handle);
1431 fformat (stdout, "[%04d] disconnect session %d\n", i,
1435 case SESSION_IO_EVT_BUILTIN_RX:
1436 s0 = session_event_get_session (e, my_thread_index);
1437 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
1440 case SESSION_CTRL_EVT_RPC:
1441 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1442 i, (u64) (uword) (e->rpc_args.fp),
1443 (u64) (uword) (e->rpc_args.arg));
1447 fformat (stdout, "[%04d] unhandled event type %d\n",
1454 if (index == mq->q->maxsize)
1460 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1463 switch (e->event_type)
1465 case SESSION_IO_EVT_RX:
1466 case SESSION_IO_EVT_TX:
1467 case SESSION_IO_EVT_BUILTIN_RX:
1468 case SESSION_IO_EVT_BUILTIN_TX:
1469 case SESSION_IO_EVT_TX_FLUSH:
1470 if (e->session_index == f->master_session_index)
1473 case SESSION_CTRL_EVT_CLOSE:
1475 case SESSION_CTRL_EVT_RPC:
1476 s = session_get_from_handle (e->session_handle);
1479 clib_warning ("session has event but doesn't exist!");
1482 if (s->rx_fifo == f || s->tx_fifo == f)
1492 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1494 session_evt_elt_t *elt;
1495 session_worker_t *wrk;
1496 int i, index, found = 0;
1497 svm_msg_q_msg_t *msg;
1498 svm_msg_q_ring_t *ring;
1503 thread_index = f->master_thread_index;
1504 wrk = session_main_get_worker (thread_index);
1509 mq = wrk->vpp_event_queue;
1510 index = mq->q->head;
1511 for (i = 0; i < mq->q->cursize; i++)
1513 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1514 ring = svm_msg_q_ring (mq, msg->ring_index);
1515 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1516 found = session_node_cmp_event (e, f);
1519 index = (index + 1) % mq->q->maxsize;
1522 * Search pending events vector
1526 clib_llist_foreach (wrk->event_elts, evt_list,
1527 pool_elt_at_index (wrk->event_elts, wrk->new_head),
1529 found = session_node_cmp_event (&elt->evt, f);
1532 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1539 clib_llist_foreach (wrk->event_elts, evt_list,
1540 pool_elt_at_index (wrk->event_elts, wrk->old_head),
1542 found = session_node_cmp_event (&elt->evt, f);
1545 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1555 static clib_error_t *
1556 session_queue_exit (vlib_main_t * vm)
1558 if (vec_len (vlib_mains) < 2)
1562 * Shut off (especially) worker-thread session nodes.
1563 * Otherwise, vpp can crash as the main thread unmaps the
1566 vlib_worker_thread_barrier_sync (vm);
1567 session_node_enable_disable (0 /* is_enable */ );
1568 vlib_worker_thread_barrier_release (vm);
1572 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1575 session_queue_run_on_main (vlib_main_t * vm)
1577 vlib_node_runtime_t *node;
1579 node = vlib_node_get_runtime (vm, session_queue_node.index);
1580 return session_queue_node_fn (vm, node, 0);
1584 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1587 uword *event_data = 0;
1593 vlib_process_wait_for_event_or_clock (vm, timeout);
1594 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1598 case SESSION_Q_PROCESS_RUN_ON_MAIN:
1599 /* Run session queue node on main thread */
1600 session_queue_run_on_main (vm);
1602 case SESSION_Q_PROCESS_STOP:
1606 /* Timed out. Run on main to ensure all events are handled */
1607 session_queue_run_on_main (vm);
1610 vec_reset_length (event_data);
1616 VLIB_REGISTER_NODE (session_queue_process_node) =
1618 .function = session_queue_process,
1619 .type = VLIB_NODE_TYPE_PROCESS,
1620 .name = "session-queue-process",
1621 .state = VLIB_NODE_STATE_DISABLED,
1625 static_always_inline uword
1626 session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1627 vlib_frame_t * frame)
1629 session_main_t *sm = &session_main;
1630 if (!sm->wrk[0].vpp_event_queue)
1632 node = vlib_node_get_runtime (vm, session_queue_node.index);
1633 return session_queue_node_fn (vm, node, frame);
1637 VLIB_REGISTER_NODE (session_queue_pre_input_node) =
1639 .function = session_queue_pre_input_inline,
1640 .type = VLIB_NODE_TYPE_PRE_INPUT,
1641 .name = "session-queue-main",
1642 .state = VLIB_NODE_STATE_DISABLED,
1647 * fd.io coding-style-patch-verification: ON
1650 * eval: (c-set-style "gnu")