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.port = mp->lcl_port;
117 a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
118 a->sep_ext.parent_handle = mp->parent_handle;
119 a->sep_ext.ckpair_index = mp->ckpair_index;
120 a->sep_ext.crypto_engine = mp->crypto_engine;
121 a->sep_ext.flags = mp->flags;
122 if (mp->hostname_len)
124 vec_validate (a->sep_ext.hostname, mp->hostname_len - 1);
125 clib_memcpy_fast (a->sep_ext.hostname, mp->hostname, mp->hostname_len);
127 a->api_context = mp->context;
128 a->app_index = app->app_index;
129 a->wrk_map_index = mp->wrk_index;
131 if ((rv = vnet_connect (a)))
133 clib_warning ("connect returned: %U", format_vnet_api_errno, rv);
134 app_wrk = application_get_worker (app, mp->wrk_index);
135 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
139 vec_free (a->sep_ext.hostname);
143 session_mq_connect_uri_handler (void *data)
145 session_connect_uri_msg_t *mp = (session_connect_uri_msg_t *) data;
146 vnet_connect_args_t _a, *a = &_a;
147 app_worker_t *app_wrk;
151 app_check_thread_and_barrier (session_mq_connect_uri_handler, mp);
153 app = application_lookup (mp->client_index);
157 clib_memset (a, 0, sizeof (*a));
158 a->uri = (char *) mp->uri;
159 a->api_context = mp->context;
160 a->app_index = app->app_index;
161 if ((rv = vnet_connect_uri (a)))
163 clib_warning ("connect_uri returned: %d", rv);
164 app_wrk = application_get_worker (app, 0 /* default wrk only */ );
165 mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0,
171 session_mq_disconnect_handler (void *data)
173 session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
174 vnet_disconnect_args_t _a, *a = &_a;
177 app = application_lookup (mp->client_index);
181 a->app_index = app->app_index;
182 a->handle = mp->handle;
183 vnet_disconnect_session (a);
187 app_mq_detach_handler (void *data)
189 session_app_detach_msg_t *mp = (session_app_detach_msg_t *) data;
190 vnet_app_detach_args_t _a, *a = &_a;
193 app_check_thread_and_barrier (app_mq_detach_handler, mp);
195 app = application_lookup (mp->client_index);
199 a->app_index = app->app_index;
200 a->api_client_index = mp->client_index;
201 vnet_application_detach (a);
205 session_mq_unlisten_handler (void *data)
207 session_unlisten_msg_t *mp = (session_unlisten_msg_t *) data;
208 vnet_unlisten_args_t _a, *a = &_a;
209 app_worker_t *app_wrk;
213 app_check_thread_and_barrier (session_mq_unlisten_handler, mp);
215 app = application_lookup (mp->client_index);
219 clib_memset (a, 0, sizeof (*a));
220 a->app_index = app->app_index;
221 a->handle = mp->handle;
222 a->wrk_map_index = mp->wrk_index;
223 if ((rv = vnet_unlisten (a)))
224 clib_warning ("unlisten returned: %d", rv);
226 app_wrk = application_get_worker (app, a->wrk_map_index);
230 mq_send_unlisten_reply (app_wrk, mp->handle, mp->context, rv);
234 session_mq_accepted_reply_handler (void *data)
236 session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
237 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
238 session_state_t old_state;
239 app_worker_t *app_wrk;
242 /* Server isn't interested, kill the session */
245 a->app_index = mp->context;
246 a->handle = mp->handle;
247 vnet_disconnect_session (a);
251 /* Mail this back from the main thread. We're not polling in main
252 * thread so we're using other workers for notifications. */
253 if (vlib_num_workers () && vlib_get_thread_index () != 0
254 && session_thread_from_handle (mp->handle) == 0)
256 vlib_rpc_call_main_thread (session_mq_accepted_reply_handler,
257 (u8 *) mp, sizeof (*mp));
261 s = session_get_from_handle_if_valid (mp->handle);
265 app_wrk = app_worker_get (s->app_wrk_index);
266 if (app_wrk->app_index != mp->context)
268 clib_warning ("app doesn't own session");
272 if (!session_has_transport (s))
274 s->session_state = SESSION_STATE_READY;
275 if (ct_session_connect_notify (s))
280 old_state = s->session_state;
281 s->session_state = SESSION_STATE_READY;
283 if (!svm_fifo_is_empty_prod (s->rx_fifo))
284 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
286 /* Closed while waiting for app to reply. Resend disconnect */
287 if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
289 app_worker_close_notify (app_wrk, s);
290 s->session_state = old_state;
297 session_mq_reset_reply_handler (void *data)
299 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
300 session_reset_reply_msg_t *mp;
301 app_worker_t *app_wrk;
304 u32 index, thread_index;
306 mp = (session_reset_reply_msg_t *) data;
307 app = application_lookup (mp->context);
311 session_parse_handle (mp->handle, &index, &thread_index);
312 s = session_get_if_valid (index, thread_index);
314 /* No session or not the right session */
315 if (!s || s->session_state < SESSION_STATE_TRANSPORT_CLOSING)
318 app_wrk = app_worker_get (s->app_wrk_index);
319 if (!app_wrk || app_wrk->app_index != app->app_index)
321 clib_warning ("App %u does not own handle 0x%lx!", app->app_index,
326 /* Client objected to resetting the session, log and continue */
329 clib_warning ("client retval %d", mp->retval);
333 /* This comes as a response to a reset, transport only waiting for
334 * confirmation to remove connection state, no need to disconnect */
335 a->handle = mp->handle;
336 a->app_index = app->app_index;
337 vnet_disconnect_session (a);
341 session_mq_disconnected_handler (void *data)
343 session_disconnected_reply_msg_t *rmp;
344 vnet_disconnect_args_t _a, *a = &_a;
345 svm_msg_q_msg_t _msg, *msg = &_msg;
346 session_disconnected_msg_t *mp;
347 app_worker_t *app_wrk;
348 session_event_t *evt;
353 mp = (session_disconnected_msg_t *) data;
354 if (!(s = session_get_from_handle_if_valid (mp->handle)))
356 clib_warning ("could not disconnect handle %llu", mp->handle);
359 app_wrk = app_worker_get (s->app_wrk_index);
360 app = application_lookup (mp->client_index);
361 if (!(app_wrk && app && app->app_index == app_wrk->app_index))
363 clib_warning ("could not disconnect session: %llu app: %u",
364 mp->handle, mp->client_index);
368 a->handle = mp->handle;
369 a->app_index = app_wrk->wrk_index;
370 rv = vnet_disconnect_session (a);
372 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
373 SESSION_MQ_CTRL_EVT_RING,
375 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
376 clib_memset (evt, 0, sizeof (*evt));
377 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
378 rmp = (session_disconnected_reply_msg_t *) evt->data;
379 rmp->handle = mp->handle;
380 rmp->context = mp->context;
382 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
386 session_mq_disconnected_reply_handler (void *data)
388 session_disconnected_reply_msg_t *mp;
389 vnet_disconnect_args_t _a, *a = &_a;
392 mp = (session_disconnected_reply_msg_t *) data;
394 /* Client objected to disconnecting the session, log and continue */
397 clib_warning ("client retval %d", mp->retval);
401 /* Disconnect has been confirmed. Confirm close to transport */
402 app = application_lookup (mp->context);
405 a->handle = mp->handle;
406 a->app_index = app->app_index;
407 vnet_disconnect_session (a);
412 session_mq_worker_update_handler (void *data)
414 session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
415 session_worker_update_reply_msg_t *rmp;
416 svm_msg_q_msg_t _msg, *msg = &_msg;
417 app_worker_t *app_wrk;
418 u32 owner_app_wrk_map;
419 session_event_t *evt;
423 app = application_lookup (mp->client_index);
426 if (!(s = session_get_from_handle_if_valid (mp->handle)))
428 clib_warning ("invalid handle %llu", mp->handle);
431 app_wrk = app_worker_get (s->app_wrk_index);
432 if (app_wrk->app_index != app->app_index)
434 clib_warning ("app %u does not own session %llu", app->app_index,
438 owner_app_wrk_map = app_wrk->wrk_map_index;
439 app_wrk = application_get_worker (app, mp->wrk_index);
441 /* This needs to come from the new owner */
442 if (mp->req_wrk_index == owner_app_wrk_map)
444 session_req_worker_update_msg_t *wump;
446 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
447 SESSION_MQ_CTRL_EVT_RING,
449 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
450 clib_memset (evt, 0, sizeof (*evt));
451 evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
452 wump = (session_req_worker_update_msg_t *) evt->data;
453 wump->session_handle = mp->handle;
454 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
458 app_worker_own_session (app_wrk, s);
463 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
464 SESSION_MQ_CTRL_EVT_RING,
466 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
467 clib_memset (evt, 0, sizeof (*evt));
468 evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
469 rmp = (session_worker_update_reply_msg_t *) evt->data;
470 rmp->handle = mp->handle;
471 rmp->rx_fifo = pointer_to_uword (s->rx_fifo);
472 rmp->tx_fifo = pointer_to_uword (s->tx_fifo);
473 rmp->segment_handle = session_segment_handle (s);
474 svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
477 * Retransmit messages that may have been lost
479 if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
480 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
482 if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
483 app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
485 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
486 app_worker_close_notify (app_wrk, s);
489 vlib_node_registration_t session_queue_node;
494 u32 server_thread_index;
495 } session_queue_trace_t;
497 /* packet trace format function */
499 format_session_queue_trace (u8 * s, va_list * args)
501 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
502 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
503 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
505 s = format (s, "session index %d thread index %d",
506 t->session_index, t->server_thread_index);
510 #define foreach_session_queue_error \
511 _(TX, "Packets transmitted") \
512 _(TIMER, "Timer events") \
513 _(NO_BUFFER, "Out of buffers")
517 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
518 foreach_session_queue_error
520 SESSION_QUEUE_N_ERROR,
521 } session_queue_error_t;
523 static char *session_queue_error_strings[] = {
524 #define _(sym,string) string,
525 foreach_session_queue_error
531 SESSION_TX_NO_BUFFERS = -2,
537 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
538 u32 next_index, u32 * to_next, u16 n_segs,
539 session_t * s, u32 n_trace)
541 session_queue_trace_t *t;
545 for (i = 0; i < clib_min (n_trace, n_segs); i++)
547 b = vlib_get_buffer (vm, to_next[i]);
548 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
549 t = vlib_add_trace (vm, node, b, sizeof (*t));
550 t->session_index = s->session_index;
551 t->server_thread_index = s->thread_index;
553 vlib_set_trace_count (vm, node, n_trace - i);
557 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
558 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
560 vlib_buffer_t *chain_b, *prev_b;
561 u32 chain_bi0, to_deq, left_from_seg;
562 session_worker_t *wrk;
563 u16 len_to_deq, n_bytes_read;
566 wrk = session_main_get_worker (ctx->s->thread_index);
567 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
568 b->total_length_not_including_first_buffer = 0;
571 left_from_seg = clib_min (ctx->sp.snd_mss - b->current_length,
573 to_deq = left_from_seg;
574 for (j = 1; j < ctx->n_bufs_per_seg; j++)
577 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
580 chain_bi0 = wrk->tx_buffers[*n_bufs];
581 chain_b = vlib_get_buffer (vm, chain_bi0);
582 chain_b->current_data = 0;
583 data = vlib_buffer_get_current (chain_b);
586 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
587 ctx->sp.tx_offset, len_to_deq, data);
588 ctx->sp.tx_offset += n_bytes_read;
592 if (ctx->transport_vft->transport_options.tx_type ==
595 svm_fifo_t *f = ctx->s->tx_fifo;
596 session_dgram_hdr_t *hdr = &ctx->hdr;
598 deq_now = clib_min (hdr->data_length - hdr->data_offset,
600 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
602 ASSERT (n_bytes_read > 0);
604 hdr->data_offset += n_bytes_read;
605 if (hdr->data_offset == hdr->data_length)
607 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
608 svm_fifo_dequeue_drop (f, offset);
612 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
615 ASSERT (n_bytes_read == len_to_deq);
616 chain_b->current_length = n_bytes_read;
617 b->total_length_not_including_first_buffer += chain_b->current_length;
619 /* update previous buffer */
620 prev_b->next_buffer = chain_bi0;
621 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
623 /* update current buffer */
624 chain_b->next_buffer = 0;
626 to_deq -= n_bytes_read;
631 && b->total_length_not_including_first_buffer == left_from_seg);
632 ctx->left_to_snd -= left_from_seg;
636 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
637 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
644 * Start with the first buffer in chain
647 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
650 data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
651 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
655 n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset,
657 ASSERT (n_bytes_read > 0);
658 /* Keep track of progress locally, transport is also supposed to
659 * increment it independently when pushing the header */
660 ctx->sp.tx_offset += n_bytes_read;
664 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
666 session_dgram_hdr_t *hdr = &ctx->hdr;
667 svm_fifo_t *f = ctx->s->tx_fifo;
671 ASSERT (hdr->data_length > hdr->data_offset);
672 deq_now = clib_min (hdr->data_length - hdr->data_offset,
674 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
675 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
676 ASSERT (n_bytes_read > 0);
678 if (ctx->s->session_state == SESSION_STATE_LISTENING)
680 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
681 ctx->tc->rmt_port = hdr->rmt_port;
683 hdr->data_offset += n_bytes_read;
684 if (hdr->data_offset == hdr->data_length)
686 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
687 svm_fifo_dequeue_drop (f, offset);
692 n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
694 ASSERT (n_bytes_read > 0);
697 b->current_length = n_bytes_read;
698 ctx->left_to_snd -= n_bytes_read;
701 * Fill in the remaining buffers in the chain, if any
703 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
704 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
708 session_tx_not_ready (session_t * s, u8 peek_data)
712 if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
714 /* Can retransmit for closed sessions but can't send new data if
715 * session is not ready or closed */
716 else if (s->session_state < SESSION_STATE_READY)
718 else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
720 /* Allow closed transports to still send custom packets.
721 * For instance, tcp may want to send acks in time-wait. */
722 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
723 && (s->flags & SESSION_F_CUSTOM_TX))
731 always_inline transport_connection_t *
732 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
736 return ctx->transport_vft->get_connection (ctx->s->connection_index,
737 ctx->s->thread_index);
741 if (ctx->s->session_state == SESSION_STATE_LISTENING)
742 return ctx->transport_vft->get_listener (ctx->s->connection_index);
745 return ctx->transport_vft->get_connection (ctx->s->connection_index,
746 ctx->s->thread_index);
752 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
753 u32 max_segs, u8 peek_data)
755 u32 n_bytes_per_buf, n_bytes_per_seg;
756 ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
759 /* Offset in rx fifo from where to peek data */
760 if (PREDICT_FALSE (ctx->sp.tx_offset >= ctx->max_dequeue))
762 ctx->max_len_to_snd = 0;
765 ctx->max_dequeue -= ctx->sp.tx_offset;
769 if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
771 if (ctx->max_dequeue <= sizeof (ctx->hdr))
773 ctx->max_len_to_snd = 0;
776 svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
778 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
779 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
782 ASSERT (ctx->max_dequeue > 0);
784 /* Ensure we're not writing more than transport window allows */
785 if (ctx->max_dequeue < ctx->sp.snd_space)
787 /* Constrained by tx queue. Try to send only fully formed segments */
788 ctx->max_len_to_snd = (ctx->max_dequeue > ctx->sp.snd_mss) ?
789 (ctx->max_dequeue - (ctx->max_dequeue % ctx->sp.snd_mss)) :
795 /* Expectation is that snd_space0 is already a multiple of snd_mss */
796 ctx->max_len_to_snd = ctx->sp.snd_space;
799 /* Check if we're tx constrained by the node */
800 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->sp.snd_mss);
801 if (ctx->n_segs_per_evt > max_segs)
803 ctx->n_segs_per_evt = max_segs;
804 ctx->max_len_to_snd = max_segs * ctx->sp.snd_mss;
807 n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
808 ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
809 n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->sp.snd_mss;
810 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
811 ctx->deq_per_buf = clib_min (ctx->sp.snd_mss, n_bytes_per_buf);
812 ctx->deq_per_first_buf = clib_min (ctx->sp.snd_mss,
814 TRANSPORT_MAX_HDRS_LEN);
818 session_tx_maybe_reschedule (session_worker_t * wrk,
819 session_tx_context_t * ctx,
820 session_evt_elt_t * elt)
822 session_t *s = ctx->s;
824 svm_fifo_unset_event (s->tx_fifo);
825 if (svm_fifo_max_dequeue_cons (s->tx_fifo) > ctx->sp.tx_offset)
826 if (svm_fifo_set_event (s->tx_fifo))
827 session_evt_add_head_old (wrk, elt);
831 session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
832 vlib_node_runtime_t * node,
833 session_evt_elt_t * elt,
834 int *n_tx_packets, u8 peek_data)
836 u32 n_trace, n_bufs_needed = 0, n_left, pbi, next_index, max_burst;
837 session_tx_context_t *ctx = &wrk->ctx;
838 session_main_t *smm = &session_main;
839 session_event_t *e = &elt->evt;
840 vlib_main_t *vm = wrk->vm;
841 transport_proto_t tp;
845 if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
848 session_evt_add_old (wrk, elt);
849 return SESSION_TX_NO_DATA;
852 next_index = smm->session_type_to_next[ctx->s->session_type];
853 max_burst = VLIB_FRAME_SIZE - *n_tx_packets;
855 tp = session_get_transport_proto (ctx->s);
856 ctx->transport_vft = transport_protocol_get_vft (tp);
857 ctx->tc = session_tx_get_transport (ctx, peek_data);
859 if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
861 if (ctx->transport_vft->flush_data)
862 ctx->transport_vft->flush_data (ctx->tc);
863 e->event_type = SESSION_IO_EVT_TX;
866 if (ctx->s->flags & SESSION_F_CUSTOM_TX)
869 ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
870 n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, max_burst);
871 *n_tx_packets += n_custom_tx;
873 (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
874 return SESSION_TX_OK;
875 max_burst -= n_custom_tx;
876 if (!max_burst || (ctx->s->flags & SESSION_F_CUSTOM_TX))
878 session_evt_add_old (wrk, elt);
879 return SESSION_TX_OK;
883 transport_connection_snd_params (ctx->tc, &ctx->sp);
885 if (!ctx->sp.snd_space)
887 /* If the deschedule flag was set, remove session from scheduler.
888 * Transport is responsible for rescheduling this session. */
889 if (ctx->sp.flags & TRANSPORT_SND_F_DESCHED)
890 transport_connection_deschedule (ctx->tc);
891 /* Request to postpone the session, e.g., zero-wnd and transport
892 * is not currently probing */
893 else if (ctx->sp.flags & TRANSPORT_SND_F_POSTPONE)
894 session_evt_add_old (wrk, elt);
895 /* This flow queue is "empty" so it should be re-evaluated before
896 * the ones that have data to send. */
898 session_evt_add_head_old (wrk, elt);
900 return SESSION_TX_NO_DATA;
903 if (transport_connection_is_tx_paced (ctx->tc))
905 u32 snd_space = transport_connection_tx_pacer_burst (ctx->tc);
906 if (snd_space < TRANSPORT_PACER_MIN_BURST)
908 session_evt_add_head_old (wrk, elt);
909 return SESSION_TX_NO_DATA;
911 snd_space = clib_min (ctx->sp.snd_space, snd_space);
912 ctx->sp.snd_space = snd_space >= ctx->sp.snd_mss ?
913 snd_space - snd_space % ctx->sp.snd_mss : snd_space;
916 /* Check how much we can pull. */
917 session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
919 if (PREDICT_FALSE (!ctx->max_len_to_snd))
921 transport_connection_tx_pacer_reset_bucket (ctx->tc, 0);
922 session_tx_maybe_reschedule (wrk, ctx, elt);
923 return SESSION_TX_NO_DATA;
926 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
927 vec_validate_aligned (wrk->tx_buffers, n_bufs_needed - 1,
928 CLIB_CACHE_LINE_BYTES);
929 n_bufs = vlib_buffer_alloc (vm, wrk->tx_buffers, n_bufs_needed);
930 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
933 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
934 session_evt_add_head_old (wrk, elt);
935 vlib_node_increment_counter (wrk->vm, node->node_index,
936 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
937 return SESSION_TX_NO_BUFFERS;
940 ctx->left_to_snd = ctx->max_len_to_snd;
941 n_left = ctx->n_segs_per_evt;
945 vlib_buffer_t *b0, *b1;
948 pbi = wrk->tx_buffers[n_bufs - 3];
949 pb = vlib_get_buffer (vm, pbi);
950 vlib_prefetch_buffer_header (pb, STORE);
951 pbi = wrk->tx_buffers[n_bufs - 4];
952 pb = vlib_get_buffer (vm, pbi);
953 vlib_prefetch_buffer_header (pb, STORE);
955 bi0 = wrk->tx_buffers[--n_bufs];
956 bi1 = wrk->tx_buffers[--n_bufs];
958 b0 = vlib_get_buffer (vm, bi0);
959 b1 = vlib_get_buffer (vm, bi1);
961 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
962 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
964 ctx->transport_vft->push_header (ctx->tc, b0);
965 ctx->transport_vft->push_header (ctx->tc, b1);
969 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
970 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
972 vec_add1 (wrk->pending_tx_buffers, bi0);
973 vec_add1 (wrk->pending_tx_buffers, bi1);
974 vec_add1 (wrk->pending_tx_nexts, next_index);
975 vec_add1 (wrk->pending_tx_nexts, next_index);
984 pbi = wrk->tx_buffers[n_bufs - 2];
985 pb = vlib_get_buffer (vm, pbi);
986 vlib_prefetch_buffer_header (pb, STORE);
989 bi0 = wrk->tx_buffers[--n_bufs];
990 b0 = vlib_get_buffer (vm, bi0);
991 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
993 /* Ask transport to push header after current_length and
994 * total_length_not_including_first_buffer are updated */
995 ctx->transport_vft->push_header (ctx->tc, b0);
999 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
1001 vec_add1 (wrk->pending_tx_buffers, bi0);
1002 vec_add1 (wrk->pending_tx_nexts, next_index);
1005 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
1006 session_tx_trace_frame (vm, node, next_index, wrk->pending_tx_buffers,
1007 ctx->n_segs_per_evt, ctx->s, n_trace);
1009 if (PREDICT_FALSE (n_bufs))
1010 vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
1012 *n_tx_packets += ctx->n_segs_per_evt;
1013 transport_connection_update_tx_bytes (ctx->tc, ctx->max_len_to_snd);
1015 SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
1016 ctx->s->tx_fifo->has_event, wrk->last_vlib_time);
1018 ASSERT (ctx->left_to_snd == 0);
1020 /* If we couldn't dequeue all bytes reschedule as old flow. Otherwise,
1021 * check if application enqueued more data and reschedule accordingly */
1022 if (ctx->max_len_to_snd < ctx->max_dequeue)
1023 session_evt_add_old (wrk, elt);
1025 session_tx_maybe_reschedule (wrk, ctx, elt);
1028 && ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
1030 /* Fix dgram pre header */
1031 if (ctx->max_len_to_snd < ctx->max_dequeue)
1032 svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
1033 sizeof (session_dgram_pre_hdr_t));
1034 /* More data needs to be read */
1035 else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
1036 if (svm_fifo_set_event (ctx->s->tx_fifo))
1037 session_evt_add_old (wrk, elt);
1039 if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
1040 session_dequeue_notify (ctx->s);
1042 return SESSION_TX_OK;
1046 session_tx_fifo_peek_and_snd (session_worker_t * wrk,
1047 vlib_node_runtime_t * node,
1048 session_evt_elt_t * e, int *n_tx_packets)
1050 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1054 session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
1055 vlib_node_runtime_t * node,
1056 session_evt_elt_t * e, int *n_tx_packets)
1058 return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1062 session_tx_fifo_dequeue_internal (session_worker_t * wrk,
1063 vlib_node_runtime_t * node,
1064 session_evt_elt_t * e, int *n_tx_packets)
1066 session_t *s = wrk->ctx.s;
1068 if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1070 svm_fifo_unset_event (s->tx_fifo);
1071 return transport_custom_tx (session_get_transport_proto (s), s,
1072 VLIB_FRAME_SIZE - *n_tx_packets);
1075 always_inline session_t *
1076 session_event_get_session (session_event_t * e, u8 thread_index)
1078 return session_get_if_valid (e->session_index, thread_index);
1082 session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
1084 clib_llist_index_t ei;
1085 void (*fp) (void *);
1089 ei = clib_llist_entry_index (wrk->event_elts, elt);
1092 switch (e->event_type)
1094 case SESSION_CTRL_EVT_RPC:
1095 fp = e->rpc_args.fp;
1096 (*fp) (e->rpc_args.arg);
1098 case SESSION_CTRL_EVT_CLOSE:
1099 s = session_get_from_handle_if_valid (e->session_handle);
1100 if (PREDICT_FALSE (!s))
1102 session_transport_close (s);
1104 case SESSION_CTRL_EVT_RESET:
1105 s = session_get_from_handle_if_valid (e->session_handle);
1106 if (PREDICT_FALSE (!s))
1108 session_transport_reset (s);
1110 case SESSION_CTRL_EVT_LISTEN:
1111 session_mq_listen_handler (session_evt_ctrl_data (wrk, elt));
1113 case SESSION_CTRL_EVT_LISTEN_URI:
1114 session_mq_listen_uri_handler (session_evt_ctrl_data (wrk, elt));
1116 case SESSION_CTRL_EVT_UNLISTEN:
1117 session_mq_unlisten_handler (session_evt_ctrl_data (wrk, elt));
1119 case SESSION_CTRL_EVT_CONNECT:
1120 session_mq_connect_handler (session_evt_ctrl_data (wrk, elt));
1122 case SESSION_CTRL_EVT_CONNECT_URI:
1123 session_mq_connect_uri_handler (session_evt_ctrl_data (wrk, elt));
1125 case SESSION_CTRL_EVT_DISCONNECT:
1126 session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
1128 case SESSION_CTRL_EVT_DISCONNECTED:
1129 session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
1131 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
1132 session_mq_accepted_reply_handler (session_evt_ctrl_data (wrk, elt));
1134 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
1135 session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
1138 case SESSION_CTRL_EVT_RESET_REPLY:
1139 session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
1141 case SESSION_CTRL_EVT_WORKER_UPDATE:
1142 session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
1144 case SESSION_CTRL_EVT_APP_DETACH:
1145 app_mq_detach_handler (session_evt_ctrl_data (wrk, elt));
1148 clib_warning ("unhandled event type %d", e->event_type);
1151 /* Regrab elements in case pool moved */
1152 elt = pool_elt_at_index (wrk->event_elts, ei);
1153 if (!clib_llist_elt_is_linked (elt, evt_list))
1156 if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1157 session_evt_ctrl_data_free (wrk, elt);
1158 session_evt_elt_free (wrk, elt);
1163 session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
1164 session_evt_elt_t * elt, u32 thread_index,
1167 session_main_t *smm = &session_main;
1168 app_worker_t *app_wrk;
1169 clib_llist_index_t ei;
1173 ei = clib_llist_entry_index (wrk->event_elts, elt);
1176 switch (e->event_type)
1178 case SESSION_IO_EVT_TX_FLUSH:
1179 case SESSION_IO_EVT_TX:
1180 s = session_event_get_session (e, thread_index);
1181 if (PREDICT_FALSE (!s))
1183 CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
1185 /* Spray packets in per session type frames, since they go to
1186 * different nodes */
1187 (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1189 case SESSION_IO_EVT_RX:
1190 s = session_event_get_session (e, thread_index);
1193 transport_app_rx_evt (session_get_transport_proto (s),
1194 s->connection_index, s->thread_index);
1196 case SESSION_IO_EVT_BUILTIN_RX:
1197 s = session_event_get_session (e, thread_index);
1198 if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1200 svm_fifo_unset_event (s->rx_fifo);
1201 app_wrk = app_worker_get (s->app_wrk_index);
1202 app_worker_builtin_rx (app_wrk, s);
1204 case SESSION_IO_EVT_BUILTIN_TX:
1205 s = session_get_from_handle_if_valid (e->session_handle);
1207 if (PREDICT_TRUE (s != 0))
1208 session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
1211 clib_warning ("unhandled event type %d", e->event_type);
1214 /* Regrab elements in case pool moved */
1215 elt = pool_elt_at_index (wrk->event_elts, ei);
1216 if (!clib_llist_elt_is_linked (elt, evt_list))
1217 session_evt_elt_free (wrk, elt);
1221 static const u32 session_evt_msg_sizes[] = {
1222 #define _(symc, sym) \
1223 [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1224 foreach_session_ctrl_evt
1230 session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1232 session_evt_elt_t *elt;
1234 if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1236 elt = session_evt_alloc_ctrl (wrk);
1237 if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1239 elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1240 elt->evt.event_type = evt->event_type;
1241 clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1242 session_evt_msg_sizes[evt->event_type]);
1246 /* Internal control events fit into io events footprint */
1247 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1252 elt = session_evt_alloc_new (wrk);
1253 clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1258 session_flush_pending_tx_buffers (session_worker_t * wrk,
1259 vlib_node_runtime_t * node)
1261 vlib_buffer_enqueue_to_next (wrk->vm, node, wrk->pending_tx_buffers,
1262 wrk->pending_tx_nexts,
1263 vec_len (wrk->pending_tx_nexts));
1264 vec_reset_length (wrk->pending_tx_buffers);
1265 vec_reset_length (wrk->pending_tx_nexts);
1269 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1270 vlib_frame_t * frame)
1272 session_main_t *smm = vnet_get_session_main ();
1273 u32 thread_index = vm->thread_index, n_to_dequeue;
1274 session_worker_t *wrk = &smm->wrk[thread_index];
1275 session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1276 clib_llist_index_t ei, next_ei, old_ti;
1277 svm_msg_q_msg_t _msg, *msg = &_msg;
1278 int i, n_tx_packets;
1279 session_event_t *evt;
1282 SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1284 wrk->last_vlib_time = vlib_time_now (vm);
1285 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1288 * Update transport time
1290 transport_update_time (wrk->last_vlib_time, thread_index);
1291 n_tx_packets = vec_len (wrk->pending_tx_buffers);
1294 * Dequeue and handle new events
1297 /* Try to dequeue what is available. Don't wait for lock.
1298 * XXX: we may need priorities here */
1299 mq = wrk->vpp_event_queue;
1300 n_to_dequeue = svm_msg_q_size (mq);
1301 if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
1303 for (i = 0; i < n_to_dequeue; i++)
1305 svm_msg_q_sub_w_lock (mq, msg);
1306 evt = svm_msg_q_msg_data (mq, msg);
1307 session_evt_add_to_list (wrk, evt);
1308 svm_msg_q_free_msg (mq, msg);
1310 svm_msg_q_unlock (mq);
1314 * Handle control events
1317 ctrl_he = pool_elt_at_index (wrk->event_elts, wrk->ctrl_head);
1320 clib_llist_foreach_safe (wrk->event_elts, evt_list, ctrl_he, elt, ({
1321 clib_llist_remove (wrk->event_elts, evt_list, elt);
1322 session_event_dispatch_ctrl (wrk, elt);
1327 * Handle the new io events.
1330 new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
1331 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1332 old_ti = clib_llist_prev_index (old_he, evt_list);
1334 ei = clib_llist_next_index (new_he, evt_list);
1335 while (ei != wrk->new_head && n_tx_packets < VLIB_FRAME_SIZE)
1337 elt = pool_elt_at_index (wrk->event_elts, ei);
1338 ei = clib_llist_next_index (elt, evt_list);
1339 clib_llist_remove (wrk->event_elts, evt_list, elt);
1340 session_event_dispatch_io (wrk, node, elt, thread_index, &n_tx_packets);
1344 * Handle the old io events, if we had any prior to processing the new ones
1347 if (old_ti != wrk->old_head)
1349 old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
1350 ei = clib_llist_next_index (old_he, evt_list);
1352 while (n_tx_packets < VLIB_FRAME_SIZE)
1354 elt = pool_elt_at_index (wrk->event_elts, ei);
1355 next_ei = clib_llist_next_index (elt, evt_list);
1356 clib_llist_remove (wrk->event_elts, evt_list, elt);
1358 session_event_dispatch_io (wrk, node, elt, thread_index,
1368 if (vec_len (wrk->pending_tx_buffers))
1369 session_flush_pending_tx_buffers (wrk, node);
1371 vlib_node_increment_counter (vm, session_queue_node.index,
1372 SESSION_QUEUE_ERROR_TX, n_tx_packets);
1374 SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
1376 return n_tx_packets;
1380 VLIB_REGISTER_NODE (session_queue_node) =
1382 .function = session_queue_node_fn,
1383 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1384 .name = "session-queue",
1385 .format_trace = format_session_queue_trace,
1386 .type = VLIB_NODE_TYPE_INPUT,
1387 .n_errors = ARRAY_LEN (session_queue_error_strings),
1388 .error_strings = session_queue_error_strings,
1389 .state = VLIB_NODE_STATE_DISABLED,
1394 dump_thread_0_event_queue (void)
1396 session_main_t *smm = vnet_get_session_main ();
1397 vlib_main_t *vm = &vlib_global_main;
1398 u32 my_thread_index = vm->thread_index;
1399 session_event_t _e, *e = &_e;
1400 svm_msg_q_ring_t *ring;
1402 svm_msg_q_msg_t *msg;
1406 mq = smm->wrk[my_thread_index].vpp_event_queue;
1407 index = mq->q->head;
1409 for (i = 0; i < mq->q->cursize; i++)
1411 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1412 ring = svm_msg_q_ring (mq, msg->ring_index);
1413 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1415 switch (e->event_type)
1417 case SESSION_IO_EVT_TX:
1418 s0 = session_event_get_session (e, my_thread_index);
1419 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
1422 case SESSION_CTRL_EVT_CLOSE:
1423 s0 = session_get_from_handle (e->session_handle);
1424 fformat (stdout, "[%04d] disconnect session %d\n", i,
1428 case SESSION_IO_EVT_BUILTIN_RX:
1429 s0 = session_event_get_session (e, my_thread_index);
1430 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
1433 case SESSION_CTRL_EVT_RPC:
1434 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1435 i, (u64) (uword) (e->rpc_args.fp),
1436 (u64) (uword) (e->rpc_args.arg));
1440 fformat (stdout, "[%04d] unhandled event type %d\n",
1447 if (index == mq->q->maxsize)
1453 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1456 switch (e->event_type)
1458 case SESSION_IO_EVT_RX:
1459 case SESSION_IO_EVT_TX:
1460 case SESSION_IO_EVT_BUILTIN_RX:
1461 case SESSION_IO_EVT_BUILTIN_TX:
1462 case SESSION_IO_EVT_TX_FLUSH:
1463 if (e->session_index == f->master_session_index)
1466 case SESSION_CTRL_EVT_CLOSE:
1468 case SESSION_CTRL_EVT_RPC:
1469 s = session_get_from_handle (e->session_handle);
1472 clib_warning ("session has event but doesn't exist!");
1475 if (s->rx_fifo == f || s->tx_fifo == f)
1485 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1487 session_evt_elt_t *elt;
1488 session_worker_t *wrk;
1489 int i, index, found = 0;
1490 svm_msg_q_msg_t *msg;
1491 svm_msg_q_ring_t *ring;
1496 thread_index = f->master_thread_index;
1497 wrk = session_main_get_worker (thread_index);
1502 mq = wrk->vpp_event_queue;
1503 index = mq->q->head;
1504 for (i = 0; i < mq->q->cursize; i++)
1506 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1507 ring = svm_msg_q_ring (mq, msg->ring_index);
1508 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1509 found = session_node_cmp_event (e, f);
1512 index = (index + 1) % mq->q->maxsize;
1515 * Search pending events vector
1519 clib_llist_foreach (wrk->event_elts, evt_list,
1520 pool_elt_at_index (wrk->event_elts, wrk->new_head),
1522 found = session_node_cmp_event (&elt->evt, f);
1525 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1532 clib_llist_foreach (wrk->event_elts, evt_list,
1533 pool_elt_at_index (wrk->event_elts, wrk->old_head),
1535 found = session_node_cmp_event (&elt->evt, f);
1538 clib_memcpy_fast (e, &elt->evt, sizeof (*e));
1548 static clib_error_t *
1549 session_queue_exit (vlib_main_t * vm)
1551 if (vec_len (vlib_mains) < 2)
1555 * Shut off (especially) worker-thread session nodes.
1556 * Otherwise, vpp can crash as the main thread unmaps the
1559 vlib_worker_thread_barrier_sync (vm);
1560 session_node_enable_disable (0 /* is_enable */ );
1561 vlib_worker_thread_barrier_release (vm);
1565 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1568 session_queue_run_on_main (vlib_main_t * vm)
1570 vlib_node_runtime_t *node;
1572 node = vlib_node_get_runtime (vm, session_queue_node.index);
1573 return session_queue_node_fn (vm, node, 0);
1577 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1580 uword *event_data = 0;
1586 vlib_process_wait_for_event_or_clock (vm, timeout);
1587 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1591 case SESSION_Q_PROCESS_RUN_ON_MAIN:
1592 /* Run session queue node on main thread */
1593 session_queue_run_on_main (vm);
1595 case SESSION_Q_PROCESS_STOP:
1599 /* Timed out. Run on main to ensure all events are handled */
1600 session_queue_run_on_main (vm);
1603 vec_reset_length (event_data);
1609 VLIB_REGISTER_NODE (session_queue_process_node) =
1611 .function = session_queue_process,
1612 .type = VLIB_NODE_TYPE_PROCESS,
1613 .name = "session-queue-process",
1614 .state = VLIB_NODE_STATE_DISABLED,
1618 static_always_inline uword
1619 session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1620 vlib_frame_t * frame)
1622 session_main_t *sm = &session_main;
1623 if (!sm->wrk[0].vpp_event_queue)
1625 node = vlib_node_get_runtime (vm, session_queue_node.index);
1626 return session_queue_node_fn (vm, node, frame);
1630 VLIB_REGISTER_NODE (session_queue_pre_input_node) =
1632 .function = session_queue_pre_input_inline,
1633 .type = VLIB_NODE_TYPE_PRE_INPUT,
1634 .name = "session-queue-main",
1635 .state = VLIB_NODE_STATE_DISABLED,
1640 * fd.io coding-style-patch-verification: ON
1643 * eval: (c-set-style "gnu")