2 * Copyright (c) 2017 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/session_debug.h>
25 #include <svm/queue.h>
28 session_mq_accepted_reply_handler (void *data)
30 session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
31 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
35 /* Server isn't interested, kill the session */
38 a->app_index = mp->context;
39 a->handle = mp->handle;
40 vnet_disconnect_session (a);
44 if (session_handle_is_local (mp->handle))
46 ls = application_get_local_session_from_handle (mp->handle);
47 if (!ls || ls->app_wrk_index != mp->context)
49 clib_warning ("server %u doesn't own local handle %llu",
50 mp->context, mp->handle);
53 if (application_local_session_connect_notify (ls))
55 ls->session_state = SESSION_STATE_READY;
59 s = session_get_from_handle_if_valid (mp->handle);
62 clib_warning ("session doesn't exist");
65 if (s->app_wrk_index != mp->context)
67 clib_warning ("app doesn't own session");
70 s->session_state = SESSION_STATE_READY;
71 if (!svm_fifo_is_empty (s->server_rx_fifo))
74 app = app_worker_get (s->app_wrk_index);
75 application_send_event (app, s, FIFO_EVENT_APP_RX);
81 session_mq_reset_reply_handler (void *data)
83 session_reset_reply_msg_t *mp;
84 app_worker_t *app_wrk;
87 u32 index, thread_index;
89 mp = (session_reset_reply_msg_t *) data;
90 app = application_lookup (mp->client_index);
94 session_parse_handle (mp->handle, &index, &thread_index);
95 s = session_get_if_valid (index, thread_index);
98 clib_warning ("Invalid session!");
101 app_wrk = app_worker_get (s->app_wrk_index);
102 if (!app_wrk || app_wrk->app_index != app->app_index)
104 clib_warning ("App % does not own handle 0x%lx!", app->app_index,
109 /* Client objected to resetting the session, log and continue */
112 clib_warning ("client retval %d", mp->retval);
116 /* This comes as a response to a reset, transport only waiting for
117 * confirmation to remove connection state, no need to disconnect */
118 stream_session_cleanup (s);
122 session_mq_disconnected_handler (void *data)
124 session_disconnected_reply_msg_t *rmp;
125 vnet_disconnect_args_t _a, *a = &_a;
126 svm_msg_q_msg_t _msg, *msg = &_msg;
127 session_disconnected_msg_t *mp;
128 app_worker_t *app_wrk;
129 session_event_t *evt;
134 mp = (session_disconnected_msg_t *) data;
135 s = session_get_from_handle_if_valid (mp->handle);
136 app_wrk = app_worker_get (s->app_wrk_index);
137 app = application_lookup (mp->client_index);
138 if (!(app_wrk && s && app->app_index == app_wrk->app_index))
140 clib_warning ("could not disconnect session: %llu app_wrk: %u",
141 mp->handle, mp->client_index);
145 a->handle = mp->handle;
146 a->app_index = app_wrk->wrk_index;
147 rv = vnet_disconnect_session (a);
149 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
150 SESSION_MQ_CTRL_EVT_RING,
152 svm_msg_q_unlock (app_wrk->event_queue);
153 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
154 memset (evt, 0, sizeof (*evt));
155 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED;
156 rmp = (session_disconnected_reply_msg_t *) evt->data;
157 rmp->handle = mp->handle;
158 rmp->context = mp->context;
160 svm_msg_q_add (app_wrk->event_queue, msg, SVM_Q_WAIT);
164 session_mq_disconnected_reply_handler (void *data)
166 session_disconnected_reply_msg_t *mp;
167 vnet_disconnect_args_t _a, *a = &_a;
170 mp = (session_disconnected_reply_msg_t *) data;
172 /* Client objected to disconnecting the session, log and continue */
175 clib_warning ("client retval %d", mp->retval);
179 /* Disconnect has been confirmed. Confirm close to transport */
180 app = application_lookup (mp->context);
183 a->handle = mp->handle;
184 a->app_index = app->app_index;
185 vnet_disconnect_session (a);
189 vlib_node_registration_t session_queue_node;
194 u32 server_thread_index;
195 } session_queue_trace_t;
197 /* packet trace format function */
199 format_session_queue_trace (u8 * s, va_list * args)
201 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
202 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
203 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
205 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
206 t->session_index, t->server_thread_index);
210 #define foreach_session_queue_error \
211 _(TX, "Packets transmitted") \
212 _(TIMER, "Timer events") \
213 _(NO_BUFFER, "Out of buffers")
217 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
218 foreach_session_queue_error
220 SESSION_QUEUE_N_ERROR,
221 } session_queue_error_t;
223 static char *session_queue_error_strings[] = {
224 #define _(sym,string) string,
225 foreach_session_queue_error
231 SESSION_TX_NO_BUFFERS = -2,
237 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
238 u32 next_index, u32 * to_next, u16 n_segs,
239 stream_session_t * s, u32 n_trace)
241 session_queue_trace_t *t;
245 for (i = 0; i < clib_min (n_trace, n_segs); i++)
247 b = vlib_get_buffer (vm, to_next[i - n_segs]);
248 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
249 t = vlib_add_trace (vm, node, b, sizeof (*t));
250 t->session_index = s->session_index;
251 t->server_thread_index = s->thread_index;
253 vlib_set_trace_count (vm, node, n_trace - i);
257 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
258 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
260 session_manager_main_t *smm = &session_manager_main;
261 vlib_buffer_t *chain_b, *prev_b;
262 u32 chain_bi0, to_deq, left_from_seg;
263 u16 len_to_deq, n_bytes_read;
266 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
267 b->total_length_not_including_first_buffer = 0;
270 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
272 to_deq = left_from_seg;
273 for (j = 1; j < ctx->n_bufs_per_seg; j++)
276 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
279 chain_bi0 = smm->tx_buffers[ctx->s->thread_index][*n_bufs];
280 _vec_len (smm->tx_buffers[ctx->s->thread_index]) = *n_bufs;
282 chain_b = vlib_get_buffer (vm, chain_bi0);
283 chain_b->current_data = 0;
284 data = vlib_buffer_get_current (chain_b);
287 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo,
288 ctx->tx_offset, len_to_deq, data);
289 ctx->tx_offset += n_bytes_read;
293 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
295 svm_fifo_t *f = ctx->s->server_tx_fifo;
296 session_dgram_hdr_t *hdr = &ctx->hdr;
298 deq_now = clib_min (hdr->data_length - hdr->data_offset,
300 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
302 ASSERT (n_bytes_read > 0);
304 hdr->data_offset += n_bytes_read;
305 if (hdr->data_offset == hdr->data_length)
306 svm_fifo_dequeue_drop (f, hdr->data_length);
309 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
312 ASSERT (n_bytes_read == len_to_deq);
313 chain_b->current_length = n_bytes_read;
314 b->total_length_not_including_first_buffer += chain_b->current_length;
316 /* update previous buffer */
317 prev_b->next_buffer = chain_bi0;
318 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
320 /* update current buffer */
321 chain_b->next_buffer = 0;
323 to_deq -= n_bytes_read;
328 && b->total_length_not_including_first_buffer == left_from_seg);
329 ctx->left_to_snd -= left_from_seg;
333 session_output_try_get_buffers (vlib_main_t * vm,
334 session_manager_main_t * smm,
335 u32 thread_index, u16 * n_bufs, u32 wanted)
338 vec_validate_aligned (smm->tx_buffers[thread_index], wanted - 1,
339 CLIB_CACHE_LINE_BYTES);
340 n_alloc = vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][*n_bufs],
343 _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
348 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
349 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
356 * Start with the first buffer in chain
359 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
362 data0 = vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
363 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
367 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo, ctx->tx_offset,
369 ASSERT (n_bytes_read > 0);
370 /* Keep track of progress locally, transport is also supposed to
371 * increment it independently when pushing the header */
372 ctx->tx_offset += n_bytes_read;
376 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
378 session_dgram_hdr_t *hdr = &ctx->hdr;
379 svm_fifo_t *f = ctx->s->server_tx_fifo;
383 ASSERT (hdr->data_length > hdr->data_offset);
384 deq_now = clib_min (hdr->data_length - hdr->data_offset,
386 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
387 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
388 ASSERT (n_bytes_read > 0);
390 if (ctx->s->session_state == SESSION_STATE_LISTENING)
392 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
393 ctx->tc->rmt_port = hdr->rmt_port;
395 hdr->data_offset += n_bytes_read;
396 if (hdr->data_offset == hdr->data_length)
398 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
399 svm_fifo_dequeue_drop (f, offset);
404 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
406 ASSERT (n_bytes_read > 0);
409 b->current_length = n_bytes_read;
410 ctx->left_to_snd -= n_bytes_read;
413 * Fill in the remaining buffers in the chain, if any
415 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
416 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
419 SESSION_EVT_DBG(SESSION_EVT_DEQ, ctx->s, ({
420 ed->data[0] = FIFO_EVENT_APP_TX;
421 ed->data[1] = ctx->max_dequeue;
422 ed->data[2] = len_to_deq;
423 ed->data[3] = ctx->left_to_snd;
429 session_tx_not_ready (stream_session_t * s, u8 peek_data)
433 /* Can retransmit for closed sessions but can't send new data if
434 * session is not ready or closed */
435 if (s->session_state < SESSION_STATE_READY)
437 if (s->session_state == SESSION_STATE_CLOSED)
443 always_inline transport_connection_t *
444 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
448 return ctx->transport_vft->get_connection (ctx->s->connection_index,
449 ctx->s->thread_index);
453 if (ctx->s->session_state == SESSION_STATE_LISTENING)
454 return ctx->transport_vft->get_listener (ctx->s->connection_index);
457 return ctx->transport_vft->get_connection (ctx->s->connection_index,
458 ctx->s->thread_index);
464 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
465 u32 max_segs, u8 peek_data)
467 u32 n_bytes_per_buf, n_bytes_per_seg;
468 ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->server_tx_fifo);
471 /* Offset in rx fifo from where to peek data */
472 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
473 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
475 ctx->max_len_to_snd = 0;
478 ctx->max_dequeue -= ctx->tx_offset;
482 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
484 if (ctx->max_dequeue <= sizeof (ctx->hdr))
486 ctx->max_len_to_snd = 0;
489 svm_fifo_peek (ctx->s->server_tx_fifo, 0, sizeof (ctx->hdr),
491 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
492 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
495 ASSERT (ctx->max_dequeue > 0);
497 /* Ensure we're not writing more than transport window allows */
498 if (ctx->max_dequeue < ctx->snd_space)
500 /* Constrained by tx queue. Try to send only fully formed segments */
501 ctx->max_len_to_snd =
502 (ctx->max_dequeue > ctx->snd_mss) ?
503 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
508 /* Expectation is that snd_space0 is already a multiple of snd_mss */
509 ctx->max_len_to_snd = ctx->snd_space;
512 /* Check if we're tx constrained by the node */
513 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
514 if (ctx->n_segs_per_evt > max_segs)
516 ctx->n_segs_per_evt = max_segs;
517 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
520 n_bytes_per_buf = vlib_buffer_free_list_buffer_size (vm,
521 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
522 ASSERT (n_bytes_per_buf > MAX_HDRS_LEN);
523 n_bytes_per_seg = MAX_HDRS_LEN + ctx->snd_mss;
524 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
525 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
526 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
527 n_bytes_per_buf - MAX_HDRS_LEN);
531 session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
533 stream_session_t * s, int *n_tx_packets,
536 u32 next_index, next0, next1, *to_next, n_left_to_next;
537 u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
538 u32 thread_index = s->thread_index, n_left, pbi;
539 session_manager_main_t *smm = &session_manager_main;
540 session_tx_context_t *ctx = &smm->ctx[thread_index];
541 transport_proto_t tp;
545 if (PREDICT_FALSE ((rv = session_tx_not_ready (s, peek_data))))
548 vec_add1 (smm->pending_event_vector[thread_index], *e);
549 return SESSION_TX_NO_DATA;
552 next_index = smm->session_type_to_next[s->session_type];
553 next0 = next1 = next_index;
555 tp = session_get_transport_proto (s);
557 ctx->transport_vft = transport_protocol_get_vft (tp);
558 ctx->tc = session_tx_get_transport (ctx, peek_data);
559 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
560 ctx->snd_space = ctx->transport_vft->send_space (ctx->tc);
561 if (ctx->snd_space == 0 || ctx->snd_mss == 0)
563 vec_add1 (smm->pending_event_vector[thread_index], *e);
564 return SESSION_TX_NO_DATA;
567 /* Allow enqueuing of a new event */
568 svm_fifo_unset_event (s->server_tx_fifo);
570 /* Check how much we can pull. */
571 session_tx_set_dequeue_params (vm, ctx, VLIB_FRAME_SIZE - *n_tx_packets,
574 if (PREDICT_FALSE (!ctx->max_len_to_snd))
575 return SESSION_TX_NO_DATA;
577 n_bufs = vec_len (smm->tx_buffers[thread_index]);
578 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
581 * Make sure we have at least one full frame of buffers ready
583 if (n_bufs < n_bufs_needed)
585 session_output_try_get_buffers (vm, smm, thread_index, &n_bufs,
586 ctx->n_bufs_per_seg * VLIB_FRAME_SIZE);
587 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
589 vec_add1 (smm->pending_event_vector[thread_index], *e);
590 return SESSION_TX_NO_BUFFERS;
595 * Write until we fill up a frame
597 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
598 if (PREDICT_FALSE (ctx->n_segs_per_evt > n_left_to_next))
600 ctx->n_segs_per_evt = n_left_to_next;
601 ctx->max_len_to_snd = ctx->snd_mss * n_left_to_next;
603 ctx->left_to_snd = ctx->max_len_to_snd;
604 n_left = ctx->n_segs_per_evt;
608 vlib_buffer_t *b0, *b1;
611 pbi = smm->tx_buffers[thread_index][n_bufs - 3];
612 pb = vlib_get_buffer (vm, pbi);
613 vlib_prefetch_buffer_header (pb, STORE);
614 pbi = smm->tx_buffers[thread_index][n_bufs - 4];
615 pb = vlib_get_buffer (vm, pbi);
616 vlib_prefetch_buffer_header (pb, STORE);
618 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
619 to_next[1] = bi1 = smm->tx_buffers[thread_index][--n_bufs];
621 b0 = vlib_get_buffer (vm, bi0);
622 b1 = vlib_get_buffer (vm, bi1);
624 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
625 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
627 ctx->transport_vft->push_header (ctx->tc, b0);
628 ctx->transport_vft->push_header (ctx->tc, b1);
634 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
635 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
637 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
638 n_left_to_next, bi0, bi1, next0,
648 pbi = smm->tx_buffers[thread_index][n_bufs - 2];
649 pb = vlib_get_buffer (vm, pbi);
650 vlib_prefetch_buffer_header (pb, STORE);
653 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
654 b0 = vlib_get_buffer (vm, bi0);
655 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
657 /* Ask transport to push header after current_length and
658 * total_length_not_including_first_buffer are updated */
659 ctx->transport_vft->push_header (ctx->tc, b0);
665 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
667 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
668 n_left_to_next, bi0, next0);
671 if (PREDICT_FALSE (n_trace > 0))
672 session_tx_trace_frame (vm, node, next_index, to_next,
673 ctx->n_segs_per_evt, s, n_trace);
675 _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
676 *n_tx_packets += ctx->n_segs_per_evt;
677 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
679 /* If we couldn't dequeue all bytes mark as partially read */
680 ASSERT (ctx->left_to_snd == 0);
681 if (ctx->max_len_to_snd < ctx->max_dequeue)
682 if (svm_fifo_set_event (s->server_tx_fifo))
683 vec_add1 (smm->pending_event_vector[thread_index], *e);
685 if (!peek_data && ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
687 /* Fix dgram pre header */
688 if (ctx->max_len_to_snd < ctx->max_dequeue)
689 svm_fifo_overwrite_head (s->server_tx_fifo, (u8 *) & ctx->hdr,
690 sizeof (session_dgram_pre_hdr_t));
691 /* More data needs to be read */
692 else if (svm_fifo_max_dequeue (s->server_tx_fifo) > 0)
693 if (svm_fifo_set_event (s->server_tx_fifo))
694 vec_add1 (smm->pending_event_vector[thread_index], *e);
696 return SESSION_TX_OK;
700 session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
702 stream_session_t * s, int *n_tx_pkts)
704 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 1);
708 session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
710 stream_session_t * s, int *n_tx_pkts)
712 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 0);
716 session_tx_fifo_dequeue_internal (vlib_main_t * vm,
717 vlib_node_runtime_t * node,
719 stream_session_t * s, int *n_tx_pkts)
722 app = application_get (s->opaque);
723 svm_fifo_unset_event (s->server_tx_fifo);
724 return app->cb_fns.builtin_app_tx_callback (s);
727 always_inline stream_session_t *
728 session_event_get_session (session_event_t * e, u8 thread_index)
730 return session_get_if_valid (e->fifo->master_session_index, thread_index);
734 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
735 vlib_frame_t * frame)
737 session_manager_main_t *smm = vnet_get_session_manager_main ();
738 u32 thread_index = vm->thread_index, n_to_dequeue, n_events;
739 session_event_t *pending_events, *e;
740 session_event_t *fifo_events;
741 svm_msg_q_msg_t _msg, *msg = &_msg;
742 f64 now = vlib_time_now (vm);
743 int n_tx_packets = 0, i, rv;
744 app_worker_t *app_wrk;
749 SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, thread_index);
752 * Update transport time
754 transport_update_time (now, thread_index);
757 * Get vpp queue events that we can dequeue without blocking
759 mq = smm->vpp_event_queues[thread_index];
760 fifo_events = smm->free_event_vector[thread_index];
761 n_to_dequeue = svm_msg_q_size (mq);
762 pending_events = smm->pending_event_vector[thread_index];
764 if (!n_to_dequeue && !vec_len (pending_events)
765 && !vec_len (smm->pending_disconnects[thread_index]))
768 SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
771 * If we didn't manage to process previous events try going
772 * over them again without dequeuing new ones.
773 * XXX: Handle senders to sessions that can't keep up
775 if (0 && vec_len (pending_events) >= 100)
777 clib_warning ("too many fifo events unsolved");
781 /* See you in the next life, don't be late
782 * XXX: we may need priorities here */
783 if (svm_msg_q_try_lock (mq))
786 for (i = 0; i < n_to_dequeue; i++)
788 vec_add2 (fifo_events, e, 1);
789 svm_msg_q_sub_w_lock (mq, msg);
790 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), sizeof (*e));
791 svm_msg_q_free_msg (mq, msg);
794 svm_msg_q_unlock (mq);
796 vec_append (fifo_events, pending_events);
797 vec_append (fifo_events, smm->pending_disconnects[thread_index]);
799 _vec_len (pending_events) = 0;
800 smm->pending_event_vector[thread_index] = pending_events;
801 _vec_len (smm->pending_disconnects[thread_index]) = 0;
804 n_events = vec_len (fifo_events);
805 for (i = 0; i < n_events; i++)
807 stream_session_t *s; /* $$$ prefetch 1 ahead maybe */
812 switch (e->event_type)
814 case FIFO_EVENT_APP_TX:
815 /* Don't try to send more that one frame per dispatch cycle */
816 if (n_tx_packets == VLIB_FRAME_SIZE)
818 vec_add1 (smm->pending_event_vector[thread_index], *e);
822 s = session_event_get_session (e, thread_index);
823 if (PREDICT_FALSE (!s))
825 clib_warning ("It's dead, Jim!");
828 is_full = svm_fifo_is_full (s->server_tx_fifo);
830 /* Spray packets in per session type frames, since they go to
832 rv = (smm->session_tx_fns[s->session_type]) (vm, node, e, s,
834 if (PREDICT_TRUE (rv == SESSION_TX_OK))
836 /* Notify app there's tx space if not polling */
837 if (PREDICT_FALSE (is_full
838 && !svm_fifo_has_event (s->server_tx_fifo)))
839 session_dequeue_notify (s);
841 else if (PREDICT_FALSE (rv == SESSION_TX_NO_BUFFERS))
843 vlib_node_increment_counter (vm, node->node_index,
844 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
848 case FIFO_EVENT_DISCONNECT:
849 /* Make sure stream disconnects run after the pending list is
851 s = session_get_from_handle (e->session_handle);
855 vec_add1 (smm->pending_disconnects[thread_index], *e);
858 /* If tx queue is still not empty, wait */
859 if (svm_fifo_max_dequeue (s->server_tx_fifo))
861 vec_add1 (smm->pending_disconnects[thread_index], *e);
865 stream_session_disconnect_transport (s);
867 case FIFO_EVENT_BUILTIN_RX:
868 s = session_event_get_session (e, thread_index);
869 if (PREDICT_FALSE (!s))
871 svm_fifo_unset_event (s->server_rx_fifo);
872 app_wrk = app_worker_get (s->app_wrk_index);
873 app = application_get (app_wrk->app_index);
874 app->cb_fns.builtin_app_rx_callback (s);
878 (*fp) (e->rpc_args.arg);
880 case SESSION_CTRL_EVT_DISCONNECTED:
881 session_mq_disconnected_handler (e->data);
883 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
884 session_mq_accepted_reply_handler (e->data);
886 case SESSION_CTRL_EVT_CONNECTED_REPLY:
888 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
889 session_mq_disconnected_reply_handler (e->data);
891 case SESSION_CTRL_EVT_RESET_REPLY:
892 session_mq_reset_reply_handler (e->data);
895 clib_warning ("unhandled event type %d", e->event_type);
899 _vec_len (fifo_events) = 0;
900 smm->free_event_vector[thread_index] = fifo_events;
902 vlib_node_increment_counter (vm, session_queue_node.index,
903 SESSION_QUEUE_ERROR_TX, n_tx_packets);
905 SESSION_EVT_DBG (SESSION_EVT_DISPATCH_END, smm, thread_index);
911 VLIB_REGISTER_NODE (session_queue_node) =
913 .function = session_queue_node_fn,
914 .name = "session-queue",
915 .format_trace = format_session_queue_trace,
916 .type = VLIB_NODE_TYPE_INPUT,
917 .n_errors = ARRAY_LEN (session_queue_error_strings),
918 .error_strings = session_queue_error_strings,
919 .state = VLIB_NODE_STATE_DISABLED,
924 dump_thread_0_event_queue (void)
926 session_manager_main_t *smm = vnet_get_session_manager_main ();
927 vlib_main_t *vm = &vlib_global_main;
928 u32 my_thread_index = vm->thread_index;
929 session_event_t _e, *e = &_e;
930 svm_msg_q_ring_t *ring;
931 stream_session_t *s0;
932 svm_msg_q_msg_t *msg;
936 mq = smm->vpp_event_queues[my_thread_index];
939 for (i = 0; i < mq->q->cursize; i++)
941 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
942 ring = svm_msg_q_ring (mq, msg->ring_index);
943 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
945 switch (e->event_type)
947 case FIFO_EVENT_APP_TX:
948 s0 = session_event_get_session (e, my_thread_index);
949 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
952 case FIFO_EVENT_DISCONNECT:
953 s0 = session_get_from_handle (e->session_handle);
954 fformat (stdout, "[%04d] disconnect session %d\n", i,
958 case FIFO_EVENT_BUILTIN_RX:
959 s0 = session_event_get_session (e, my_thread_index);
960 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
964 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
965 i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
969 fformat (stdout, "[%04d] unhandled event type %d\n",
976 if (index == mq->q->maxsize)
982 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
985 switch (e->event_type)
987 case FIFO_EVENT_APP_RX:
988 case FIFO_EVENT_APP_TX:
989 case FIFO_EVENT_BUILTIN_RX:
993 case FIFO_EVENT_DISCONNECT:
996 s = session_get_from_handle (e->session_handle);
999 clib_warning ("session has event but doesn't exist!");
1002 if (s->server_rx_fifo == f || s->server_tx_fifo == f)
1012 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1014 session_manager_main_t *smm = vnet_get_session_manager_main ();
1016 session_event_t *pending_event_vector, *evt;
1017 int i, index, found = 0;
1018 svm_msg_q_msg_t *msg;
1019 svm_msg_q_ring_t *ring;
1023 thread_index = f->master_thread_index;
1027 mq = smm->vpp_event_queues[thread_index];
1028 index = mq->q->head;
1029 for (i = 0; i < mq->q->cursize; i++)
1031 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1032 ring = svm_msg_q_ring (mq, msg->ring_index);
1033 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1034 found = session_node_cmp_event (e, f);
1037 if (++index == mq->q->maxsize)
1041 * Search pending events vector
1043 pending_event_vector = smm->pending_event_vector[thread_index];
1044 vec_foreach (evt, pending_event_vector)
1046 found = session_node_cmp_event (evt, f);
1049 clib_memcpy (e, evt, sizeof (*evt));
1056 static clib_error_t *
1057 session_queue_exit (vlib_main_t * vm)
1059 if (vec_len (vlib_mains) < 2)
1063 * Shut off (especially) worker-thread session nodes.
1064 * Otherwise, vpp can crash as the main thread unmaps the
1067 vlib_worker_thread_barrier_sync (vm);
1068 session_node_enable_disable (0 /* is_enable */ );
1069 vlib_worker_thread_barrier_release (vm);
1073 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1076 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1079 f64 now, timeout = 1.0;
1080 uword *event_data = 0;
1085 vlib_process_wait_for_event_or_clock (vm, timeout);
1086 now = vlib_time_now (vm);
1087 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1091 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1092 /* Flush the frames by updating all transports times */
1093 transport_update_time (now, 0);
1095 case SESSION_Q_PROCESS_STOP:
1099 /* Timed out. Update time for all transports to trigger all
1100 * outstanding retransmits. */
1101 transport_update_time (now, 0);
1104 vec_reset_length (event_data);
1110 VLIB_REGISTER_NODE (session_queue_process_node) =
1112 .function = session_queue_process,
1113 .type = VLIB_NODE_TYPE_PROCESS,
1114 .name = "session-queue-process",
1115 .state = VLIB_NODE_STATE_DISABLED,
1121 * fd.io coding-style-patch-verification: ON
1124 * eval: (c-set-style "gnu")