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 if (!(s = session_get_from_handle_if_valid (mp->handle)))
137 clib_warning ("could not disconnect handle %llu", mp->handle);
140 app_wrk = app_worker_get (s->app_wrk_index);
141 app = application_lookup (mp->client_index);
142 if (!(app_wrk && app && app->app_index == app_wrk->app_index))
144 clib_warning ("could not disconnect session: %llu app: %u",
145 mp->handle, mp->client_index);
149 a->handle = mp->handle;
150 a->app_index = app_wrk->wrk_index;
151 rv = vnet_disconnect_session (a);
153 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
154 SESSION_MQ_CTRL_EVT_RING,
156 svm_msg_q_unlock (app_wrk->event_queue);
157 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
158 memset (evt, 0, sizeof (*evt));
159 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED;
160 rmp = (session_disconnected_reply_msg_t *) evt->data;
161 rmp->handle = mp->handle;
162 rmp->context = mp->context;
164 svm_msg_q_add (app_wrk->event_queue, msg, SVM_Q_WAIT);
168 session_mq_disconnected_reply_handler (void *data)
170 session_disconnected_reply_msg_t *mp;
171 vnet_disconnect_args_t _a, *a = &_a;
174 mp = (session_disconnected_reply_msg_t *) data;
176 /* Client objected to disconnecting the session, log and continue */
179 clib_warning ("client retval %d", mp->retval);
183 /* Disconnect has been confirmed. Confirm close to transport */
184 app = application_lookup (mp->context);
187 a->handle = mp->handle;
188 a->app_index = app->app_index;
189 vnet_disconnect_session (a);
193 vlib_node_registration_t session_queue_node;
198 u32 server_thread_index;
199 } session_queue_trace_t;
201 /* packet trace format function */
203 format_session_queue_trace (u8 * s, va_list * args)
205 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
206 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
207 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
209 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
210 t->session_index, t->server_thread_index);
214 #define foreach_session_queue_error \
215 _(TX, "Packets transmitted") \
216 _(TIMER, "Timer events") \
217 _(NO_BUFFER, "Out of buffers")
221 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
222 foreach_session_queue_error
224 SESSION_QUEUE_N_ERROR,
225 } session_queue_error_t;
227 static char *session_queue_error_strings[] = {
228 #define _(sym,string) string,
229 foreach_session_queue_error
235 SESSION_TX_NO_BUFFERS = -2,
241 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
242 u32 next_index, u32 * to_next, u16 n_segs,
243 stream_session_t * s, u32 n_trace)
245 session_queue_trace_t *t;
249 for (i = 0; i < clib_min (n_trace, n_segs); i++)
251 b = vlib_get_buffer (vm, to_next[i - n_segs]);
252 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
253 t = vlib_add_trace (vm, node, b, sizeof (*t));
254 t->session_index = s->session_index;
255 t->server_thread_index = s->thread_index;
257 vlib_set_trace_count (vm, node, n_trace - i);
261 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
262 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
264 session_manager_main_t *smm = &session_manager_main;
265 vlib_buffer_t *chain_b, *prev_b;
266 u32 chain_bi0, to_deq, left_from_seg;
267 u16 len_to_deq, n_bytes_read;
270 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
271 b->total_length_not_including_first_buffer = 0;
274 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
276 to_deq = left_from_seg;
277 for (j = 1; j < ctx->n_bufs_per_seg; j++)
280 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
283 chain_bi0 = smm->tx_buffers[ctx->s->thread_index][*n_bufs];
284 _vec_len (smm->tx_buffers[ctx->s->thread_index]) = *n_bufs;
286 chain_b = vlib_get_buffer (vm, chain_bi0);
287 chain_b->current_data = 0;
288 data = vlib_buffer_get_current (chain_b);
291 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo,
292 ctx->tx_offset, len_to_deq, data);
293 ctx->tx_offset += n_bytes_read;
297 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
299 svm_fifo_t *f = ctx->s->server_tx_fifo;
300 session_dgram_hdr_t *hdr = &ctx->hdr;
302 deq_now = clib_min (hdr->data_length - hdr->data_offset,
304 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
306 ASSERT (n_bytes_read > 0);
308 hdr->data_offset += n_bytes_read;
309 if (hdr->data_offset == hdr->data_length)
311 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
312 svm_fifo_dequeue_drop (f, offset);
316 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
319 ASSERT (n_bytes_read == len_to_deq);
320 chain_b->current_length = n_bytes_read;
321 b->total_length_not_including_first_buffer += chain_b->current_length;
323 /* update previous buffer */
324 prev_b->next_buffer = chain_bi0;
325 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
327 /* update current buffer */
328 chain_b->next_buffer = 0;
330 to_deq -= n_bytes_read;
335 && b->total_length_not_including_first_buffer == left_from_seg);
336 ctx->left_to_snd -= left_from_seg;
340 session_output_try_get_buffers (vlib_main_t * vm,
341 session_manager_main_t * smm,
342 u32 thread_index, u16 * n_bufs, u32 wanted)
345 vec_validate_aligned (smm->tx_buffers[thread_index], wanted - 1,
346 CLIB_CACHE_LINE_BYTES);
347 n_alloc = vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][*n_bufs],
350 _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
355 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
356 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
363 * Start with the first buffer in chain
366 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
369 data0 = vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
370 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
374 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo, ctx->tx_offset,
376 ASSERT (n_bytes_read > 0);
377 /* Keep track of progress locally, transport is also supposed to
378 * increment it independently when pushing the header */
379 ctx->tx_offset += n_bytes_read;
383 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
385 session_dgram_hdr_t *hdr = &ctx->hdr;
386 svm_fifo_t *f = ctx->s->server_tx_fifo;
390 ASSERT (hdr->data_length > hdr->data_offset);
391 deq_now = clib_min (hdr->data_length - hdr->data_offset,
393 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
394 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
395 ASSERT (n_bytes_read > 0);
397 if (ctx->s->session_state == SESSION_STATE_LISTENING)
399 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
400 ctx->tc->rmt_port = hdr->rmt_port;
402 hdr->data_offset += n_bytes_read;
403 if (hdr->data_offset == hdr->data_length)
405 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
406 svm_fifo_dequeue_drop (f, offset);
411 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
413 ASSERT (n_bytes_read > 0);
416 b->current_length = n_bytes_read;
417 ctx->left_to_snd -= n_bytes_read;
420 * Fill in the remaining buffers in the chain, if any
422 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
423 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
426 SESSION_EVT_DBG(SESSION_EVT_DEQ, ctx->s, ({
427 ed->data[0] = FIFO_EVENT_APP_TX;
428 ed->data[1] = ctx->max_dequeue;
429 ed->data[2] = len_to_deq;
430 ed->data[3] = ctx->left_to_snd;
436 session_tx_not_ready (stream_session_t * s, u8 peek_data)
440 /* Can retransmit for closed sessions but can't send new data if
441 * session is not ready or closed */
442 if (s->session_state < SESSION_STATE_READY)
444 if (s->session_state == SESSION_STATE_CLOSED)
450 always_inline transport_connection_t *
451 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
455 return ctx->transport_vft->get_connection (ctx->s->connection_index,
456 ctx->s->thread_index);
460 if (ctx->s->session_state == SESSION_STATE_LISTENING)
461 return ctx->transport_vft->get_listener (ctx->s->connection_index);
464 return ctx->transport_vft->get_connection (ctx->s->connection_index,
465 ctx->s->thread_index);
471 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
472 u32 max_segs, u8 peek_data)
474 u32 n_bytes_per_buf, n_bytes_per_seg;
475 ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->server_tx_fifo);
478 /* Offset in rx fifo from where to peek data */
479 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
480 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
482 ctx->max_len_to_snd = 0;
485 ctx->max_dequeue -= ctx->tx_offset;
489 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
491 if (ctx->max_dequeue <= sizeof (ctx->hdr))
493 ctx->max_len_to_snd = 0;
496 svm_fifo_peek (ctx->s->server_tx_fifo, 0, sizeof (ctx->hdr),
498 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
499 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
502 ASSERT (ctx->max_dequeue > 0);
504 /* Ensure we're not writing more than transport window allows */
505 if (ctx->max_dequeue < ctx->snd_space)
507 /* Constrained by tx queue. Try to send only fully formed segments */
508 ctx->max_len_to_snd =
509 (ctx->max_dequeue > ctx->snd_mss) ?
510 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
515 /* Expectation is that snd_space0 is already a multiple of snd_mss */
516 ctx->max_len_to_snd = ctx->snd_space;
519 /* Check if we're tx constrained by the node */
520 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
521 if (ctx->n_segs_per_evt > max_segs)
523 ctx->n_segs_per_evt = max_segs;
524 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
527 n_bytes_per_buf = vlib_buffer_free_list_buffer_size (vm,
528 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
529 ASSERT (n_bytes_per_buf > MAX_HDRS_LEN);
530 n_bytes_per_seg = MAX_HDRS_LEN + ctx->snd_mss;
531 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
532 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
533 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
534 n_bytes_per_buf - MAX_HDRS_LEN);
538 session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
540 stream_session_t * s, int *n_tx_packets,
543 u32 next_index, next0, next1, *to_next, n_left_to_next;
544 u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
545 u32 thread_index = s->thread_index, n_left, pbi;
546 session_manager_main_t *smm = &session_manager_main;
547 session_tx_context_t *ctx = &smm->ctx[thread_index];
548 transport_proto_t tp;
552 if (PREDICT_FALSE ((rv = session_tx_not_ready (s, peek_data))))
555 vec_add1 (smm->pending_event_vector[thread_index], *e);
556 return SESSION_TX_NO_DATA;
559 next_index = smm->session_type_to_next[s->session_type];
560 next0 = next1 = next_index;
562 tp = session_get_transport_proto (s);
564 ctx->transport_vft = transport_protocol_get_vft (tp);
565 ctx->tc = session_tx_get_transport (ctx, peek_data);
566 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
567 ctx->snd_space = ctx->transport_vft->send_space (ctx->tc);
568 if (ctx->snd_space == 0 || ctx->snd_mss == 0)
570 vec_add1 (smm->pending_event_vector[thread_index], *e);
571 return SESSION_TX_NO_DATA;
574 /* Allow enqueuing of a new event */
575 svm_fifo_unset_event (s->server_tx_fifo);
577 /* Check how much we can pull. */
578 session_tx_set_dequeue_params (vm, ctx, VLIB_FRAME_SIZE - *n_tx_packets,
581 if (PREDICT_FALSE (!ctx->max_len_to_snd))
582 return SESSION_TX_NO_DATA;
584 n_bufs = vec_len (smm->tx_buffers[thread_index]);
585 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
588 * Make sure we have at least one full frame of buffers ready
590 if (n_bufs < n_bufs_needed)
592 session_output_try_get_buffers (vm, smm, thread_index, &n_bufs,
593 ctx->n_bufs_per_seg * VLIB_FRAME_SIZE);
594 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
596 vec_add1 (smm->pending_event_vector[thread_index], *e);
597 return SESSION_TX_NO_BUFFERS;
602 * Write until we fill up a frame
604 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
605 if (PREDICT_FALSE (ctx->n_segs_per_evt > n_left_to_next))
607 ctx->n_segs_per_evt = n_left_to_next;
608 ctx->max_len_to_snd = ctx->snd_mss * n_left_to_next;
610 ctx->left_to_snd = ctx->max_len_to_snd;
611 n_left = ctx->n_segs_per_evt;
615 vlib_buffer_t *b0, *b1;
618 pbi = smm->tx_buffers[thread_index][n_bufs - 3];
619 pb = vlib_get_buffer (vm, pbi);
620 vlib_prefetch_buffer_header (pb, STORE);
621 pbi = smm->tx_buffers[thread_index][n_bufs - 4];
622 pb = vlib_get_buffer (vm, pbi);
623 vlib_prefetch_buffer_header (pb, STORE);
625 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
626 to_next[1] = bi1 = smm->tx_buffers[thread_index][--n_bufs];
628 b0 = vlib_get_buffer (vm, bi0);
629 b1 = vlib_get_buffer (vm, bi1);
631 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
632 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
634 ctx->transport_vft->push_header (ctx->tc, b0);
635 ctx->transport_vft->push_header (ctx->tc, b1);
641 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
642 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
644 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
645 n_left_to_next, bi0, bi1, next0,
655 pbi = smm->tx_buffers[thread_index][n_bufs - 2];
656 pb = vlib_get_buffer (vm, pbi);
657 vlib_prefetch_buffer_header (pb, STORE);
660 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
661 b0 = vlib_get_buffer (vm, bi0);
662 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
664 /* Ask transport to push header after current_length and
665 * total_length_not_including_first_buffer are updated */
666 ctx->transport_vft->push_header (ctx->tc, b0);
672 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
674 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
675 n_left_to_next, bi0, next0);
678 if (PREDICT_FALSE (n_trace > 0))
679 session_tx_trace_frame (vm, node, next_index, to_next,
680 ctx->n_segs_per_evt, s, n_trace);
682 _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
683 *n_tx_packets += ctx->n_segs_per_evt;
684 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
686 /* If we couldn't dequeue all bytes mark as partially read */
687 ASSERT (ctx->left_to_snd == 0);
688 if (ctx->max_len_to_snd < ctx->max_dequeue)
689 if (svm_fifo_set_event (s->server_tx_fifo))
690 vec_add1 (smm->pending_event_vector[thread_index], *e);
692 if (!peek_data && ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
694 /* Fix dgram pre header */
695 if (ctx->max_len_to_snd < ctx->max_dequeue)
696 svm_fifo_overwrite_head (s->server_tx_fifo, (u8 *) & ctx->hdr,
697 sizeof (session_dgram_pre_hdr_t));
698 /* More data needs to be read */
699 else if (svm_fifo_max_dequeue (s->server_tx_fifo) > 0)
700 if (svm_fifo_set_event (s->server_tx_fifo))
701 vec_add1 (smm->pending_event_vector[thread_index], *e);
703 return SESSION_TX_OK;
707 session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
709 stream_session_t * s, int *n_tx_pkts)
711 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 1);
715 session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
717 stream_session_t * s, int *n_tx_pkts)
719 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 0);
723 session_tx_fifo_dequeue_internal (vlib_main_t * vm,
724 vlib_node_runtime_t * node,
726 stream_session_t * s, int *n_tx_pkts)
729 app = application_get (s->opaque);
730 svm_fifo_unset_event (s->server_tx_fifo);
731 return app->cb_fns.builtin_app_tx_callback (s);
734 always_inline stream_session_t *
735 session_event_get_session (session_event_t * e, u8 thread_index)
737 return session_get_if_valid (e->fifo->master_session_index, thread_index);
741 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
742 vlib_frame_t * frame)
744 session_manager_main_t *smm = vnet_get_session_manager_main ();
745 u32 thread_index = vm->thread_index, n_to_dequeue, n_events;
746 session_event_t *pending_events, *e;
747 session_event_t *fifo_events;
748 svm_msg_q_msg_t _msg, *msg = &_msg;
749 f64 now = vlib_time_now (vm);
750 int n_tx_packets = 0, i, rv;
751 app_worker_t *app_wrk;
756 SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, thread_index);
759 * Update transport time
761 transport_update_time (now, thread_index);
764 * Get vpp queue events that we can dequeue without blocking
766 mq = smm->vpp_event_queues[thread_index];
767 fifo_events = smm->free_event_vector[thread_index];
768 n_to_dequeue = svm_msg_q_size (mq);
769 pending_events = smm->pending_event_vector[thread_index];
771 if (!n_to_dequeue && !vec_len (pending_events)
772 && !vec_len (smm->pending_disconnects[thread_index]))
775 SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
778 * If we didn't manage to process previous events try going
779 * over them again without dequeuing new ones.
780 * XXX: Handle senders to sessions that can't keep up
782 if (0 && vec_len (pending_events) >= 100)
784 clib_warning ("too many fifo events unsolved");
788 /* See you in the next life, don't be late
789 * XXX: we may need priorities here */
790 if (svm_msg_q_try_lock (mq))
793 for (i = 0; i < n_to_dequeue; i++)
795 vec_add2 (fifo_events, e, 1);
796 svm_msg_q_sub_w_lock (mq, msg);
797 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), sizeof (*e));
798 svm_msg_q_free_msg (mq, msg);
801 svm_msg_q_unlock (mq);
803 vec_append (fifo_events, pending_events);
804 vec_append (fifo_events, smm->pending_disconnects[thread_index]);
806 _vec_len (pending_events) = 0;
807 smm->pending_event_vector[thread_index] = pending_events;
808 _vec_len (smm->pending_disconnects[thread_index]) = 0;
811 n_events = vec_len (fifo_events);
812 for (i = 0; i < n_events; i++)
814 stream_session_t *s; /* $$$ prefetch 1 ahead maybe */
819 switch (e->event_type)
821 case FIFO_EVENT_APP_TX:
822 /* Don't try to send more that one frame per dispatch cycle */
823 if (n_tx_packets == VLIB_FRAME_SIZE)
825 vec_add1 (smm->pending_event_vector[thread_index], *e);
829 s = session_event_get_session (e, thread_index);
830 if (PREDICT_FALSE (!s))
832 clib_warning ("It's dead, Jim!");
835 is_full = svm_fifo_is_full (s->server_tx_fifo);
837 /* Spray packets in per session type frames, since they go to
839 rv = (smm->session_tx_fns[s->session_type]) (vm, node, e, s,
841 if (PREDICT_TRUE (rv == SESSION_TX_OK))
843 /* Notify app there's tx space if not polling */
844 if (PREDICT_FALSE (is_full
845 && !svm_fifo_has_event (s->server_tx_fifo)))
846 session_dequeue_notify (s);
848 else if (PREDICT_FALSE (rv == SESSION_TX_NO_BUFFERS))
850 vlib_node_increment_counter (vm, node->node_index,
851 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
855 case FIFO_EVENT_DISCONNECT:
856 /* Make sure stream disconnects run after the pending list is
858 s = session_get_from_handle (e->session_handle);
862 vec_add1 (smm->pending_disconnects[thread_index], *e);
865 /* If tx queue is still not empty, wait */
866 if (svm_fifo_max_dequeue (s->server_tx_fifo))
868 vec_add1 (smm->pending_disconnects[thread_index], *e);
872 stream_session_disconnect_transport (s);
874 case FIFO_EVENT_BUILTIN_RX:
875 s = session_event_get_session (e, thread_index);
876 if (PREDICT_FALSE (!s))
878 svm_fifo_unset_event (s->server_rx_fifo);
879 app_wrk = app_worker_get (s->app_wrk_index);
880 app = application_get (app_wrk->app_index);
881 app->cb_fns.builtin_app_rx_callback (s);
885 (*fp) (e->rpc_args.arg);
887 case SESSION_CTRL_EVT_DISCONNECTED:
888 session_mq_disconnected_handler (e->data);
890 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
891 session_mq_accepted_reply_handler (e->data);
893 case SESSION_CTRL_EVT_CONNECTED_REPLY:
895 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
896 session_mq_disconnected_reply_handler (e->data);
898 case SESSION_CTRL_EVT_RESET_REPLY:
899 session_mq_reset_reply_handler (e->data);
902 clib_warning ("unhandled event type %d", e->event_type);
906 _vec_len (fifo_events) = 0;
907 smm->free_event_vector[thread_index] = fifo_events;
909 vlib_node_increment_counter (vm, session_queue_node.index,
910 SESSION_QUEUE_ERROR_TX, n_tx_packets);
912 SESSION_EVT_DBG (SESSION_EVT_DISPATCH_END, smm, thread_index);
918 VLIB_REGISTER_NODE (session_queue_node) =
920 .function = session_queue_node_fn,
921 .name = "session-queue",
922 .format_trace = format_session_queue_trace,
923 .type = VLIB_NODE_TYPE_INPUT,
924 .n_errors = ARRAY_LEN (session_queue_error_strings),
925 .error_strings = session_queue_error_strings,
926 .state = VLIB_NODE_STATE_DISABLED,
931 dump_thread_0_event_queue (void)
933 session_manager_main_t *smm = vnet_get_session_manager_main ();
934 vlib_main_t *vm = &vlib_global_main;
935 u32 my_thread_index = vm->thread_index;
936 session_event_t _e, *e = &_e;
937 svm_msg_q_ring_t *ring;
938 stream_session_t *s0;
939 svm_msg_q_msg_t *msg;
943 mq = smm->vpp_event_queues[my_thread_index];
946 for (i = 0; i < mq->q->cursize; i++)
948 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
949 ring = svm_msg_q_ring (mq, msg->ring_index);
950 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
952 switch (e->event_type)
954 case FIFO_EVENT_APP_TX:
955 s0 = session_event_get_session (e, my_thread_index);
956 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
959 case FIFO_EVENT_DISCONNECT:
960 s0 = session_get_from_handle (e->session_handle);
961 fformat (stdout, "[%04d] disconnect session %d\n", i,
965 case FIFO_EVENT_BUILTIN_RX:
966 s0 = session_event_get_session (e, my_thread_index);
967 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
971 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
972 i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
976 fformat (stdout, "[%04d] unhandled event type %d\n",
983 if (index == mq->q->maxsize)
989 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
992 switch (e->event_type)
994 case FIFO_EVENT_APP_RX:
995 case FIFO_EVENT_APP_TX:
996 case FIFO_EVENT_BUILTIN_RX:
1000 case FIFO_EVENT_DISCONNECT:
1002 case FIFO_EVENT_RPC:
1003 s = session_get_from_handle (e->session_handle);
1006 clib_warning ("session has event but doesn't exist!");
1009 if (s->server_rx_fifo == f || s->server_tx_fifo == f)
1019 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1021 session_manager_main_t *smm = vnet_get_session_manager_main ();
1023 session_event_t *pending_event_vector, *evt;
1024 int i, index, found = 0;
1025 svm_msg_q_msg_t *msg;
1026 svm_msg_q_ring_t *ring;
1030 thread_index = f->master_thread_index;
1034 mq = smm->vpp_event_queues[thread_index];
1035 index = mq->q->head;
1036 for (i = 0; i < mq->q->cursize; i++)
1038 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1039 ring = svm_msg_q_ring (mq, msg->ring_index);
1040 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1041 found = session_node_cmp_event (e, f);
1044 if (++index == mq->q->maxsize)
1048 * Search pending events vector
1050 pending_event_vector = smm->pending_event_vector[thread_index];
1051 vec_foreach (evt, pending_event_vector)
1053 found = session_node_cmp_event (evt, f);
1056 clib_memcpy (e, evt, sizeof (*evt));
1063 static clib_error_t *
1064 session_queue_exit (vlib_main_t * vm)
1066 if (vec_len (vlib_mains) < 2)
1070 * Shut off (especially) worker-thread session nodes.
1071 * Otherwise, vpp can crash as the main thread unmaps the
1074 vlib_worker_thread_barrier_sync (vm);
1075 session_node_enable_disable (0 /* is_enable */ );
1076 vlib_worker_thread_barrier_release (vm);
1080 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1083 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1086 f64 now, timeout = 1.0;
1087 uword *event_data = 0;
1092 vlib_process_wait_for_event_or_clock (vm, timeout);
1093 now = vlib_time_now (vm);
1094 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1098 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1099 /* Flush the frames by updating all transports times */
1100 transport_update_time (now, 0);
1102 case SESSION_Q_PROCESS_STOP:
1106 /* Timed out. Update time for all transports to trigger all
1107 * outstanding retransmits. */
1108 transport_update_time (now, 0);
1111 vec_reset_length (event_data);
1117 VLIB_REGISTER_NODE (session_queue_process_node) =
1119 .function = session_queue_process,
1120 .type = VLIB_NODE_TYPE_PROCESS,
1121 .name = "session-queue-process",
1122 .state = VLIB_NODE_STATE_DISABLED,
1128 * fd.io coding-style-patch-verification: ON
1131 * eval: (c-set-style "gnu")