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/session_debug.h>
24 #include <svm/queue.h>
26 vlib_node_registration_t session_queue_node;
31 u32 server_thread_index;
32 } session_queue_trace_t;
34 /* packet trace format function */
36 format_session_queue_trace (u8 * s, va_list * args)
38 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
39 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
40 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
42 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
43 t->session_index, t->server_thread_index);
47 vlib_node_registration_t session_queue_node;
49 #define foreach_session_queue_error \
50 _(TX, "Packets transmitted") \
51 _(TIMER, "Timer events") \
52 _(NO_BUFFER, "Out of buffers")
56 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
57 foreach_session_queue_error
59 SESSION_QUEUE_N_ERROR,
60 } session_queue_error_t;
62 static char *session_queue_error_strings[] = {
63 #define _(sym,string) string,
64 foreach_session_queue_error
69 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
70 u32 next_index, u32 * to_next, u16 n_segs,
71 stream_session_t * s, u32 n_trace)
73 session_queue_trace_t *t;
77 for (i = 0; i < clib_min (n_trace, n_segs); i++)
79 b = vlib_get_buffer (vm, to_next[i - n_segs]);
80 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
81 t = vlib_add_trace (vm, node, b, sizeof (*t));
82 t->session_index = s->session_index;
83 t->server_thread_index = s->thread_index;
85 vlib_set_trace_count (vm, node, n_trace - i);
89 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
90 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
92 session_manager_main_t *smm = &session_manager_main;
93 vlib_buffer_t *chain_b, *prev_b;
94 u32 chain_bi0, to_deq, left_from_seg;
95 u16 len_to_deq, n_bytes_read;
98 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
99 b->total_length_not_including_first_buffer = 0;
102 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
104 to_deq = left_from_seg;
105 for (j = 1; j < ctx->n_bufs_per_seg; j++)
108 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
111 chain_bi0 = smm->tx_buffers[ctx->s->thread_index][*n_bufs];
112 _vec_len (smm->tx_buffers[ctx->s->thread_index]) = *n_bufs;
114 chain_b = vlib_get_buffer (vm, chain_bi0);
115 chain_b->current_data = 0;
116 data = vlib_buffer_get_current (chain_b);
119 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo,
120 ctx->tx_offset, len_to_deq, data);
121 ctx->tx_offset += n_bytes_read;
125 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
127 svm_fifo_t *f = ctx->s->server_tx_fifo;
128 session_dgram_hdr_t *hdr = &ctx->hdr;
130 deq_now = clib_min (hdr->data_length - hdr->data_offset,
132 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
134 ASSERT (n_bytes_read > 0);
136 hdr->data_offset += n_bytes_read;
137 if (hdr->data_offset == hdr->data_length)
138 svm_fifo_dequeue_drop (f, hdr->data_length);
141 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
144 ASSERT (n_bytes_read == len_to_deq);
145 chain_b->current_length = n_bytes_read;
146 b->total_length_not_including_first_buffer += chain_b->current_length;
148 /* update previous buffer */
149 prev_b->next_buffer = chain_bi0;
150 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
152 /* update current buffer */
153 chain_b->next_buffer = 0;
155 to_deq -= n_bytes_read;
160 && b->total_length_not_including_first_buffer == left_from_seg);
161 ctx->left_to_snd -= left_from_seg;
165 session_output_try_get_buffers (vlib_main_t * vm,
166 session_manager_main_t * smm,
167 u32 thread_index, u16 * n_bufs, u32 wanted)
170 vec_validate_aligned (smm->tx_buffers[thread_index], wanted - 1,
171 CLIB_CACHE_LINE_BYTES);
172 n_alloc = vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][*n_bufs],
175 _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
180 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
181 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
188 * Start with the first buffer in chain
191 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
194 data0 = vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
195 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
199 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo, ctx->tx_offset,
201 ASSERT (n_bytes_read > 0);
202 /* Keep track of progress locally, transport is also supposed to
203 * increment it independently when pushing the header */
204 ctx->tx_offset += n_bytes_read;
208 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
210 session_dgram_hdr_t *hdr = &ctx->hdr;
211 svm_fifo_t *f = ctx->s->server_tx_fifo;
215 ASSERT (hdr->data_length > hdr->data_offset);
216 deq_now = clib_min (hdr->data_length - hdr->data_offset,
218 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
219 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
220 ASSERT (n_bytes_read > 0);
222 if (ctx->s->session_state == SESSION_STATE_LISTENING)
224 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
225 ctx->tc->rmt_port = hdr->rmt_port;
227 hdr->data_offset += n_bytes_read;
228 if (hdr->data_offset == hdr->data_length)
230 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
231 svm_fifo_dequeue_drop (f, offset);
236 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
238 ASSERT (n_bytes_read > 0);
241 b->current_length = n_bytes_read;
242 ctx->left_to_snd -= n_bytes_read;
245 * Fill in the remaining buffers in the chain, if any
247 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
248 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
251 SESSION_EVT_DBG(SESSION_EVT_DEQ, ctx->s, ({
252 ed->data[0] = FIFO_EVENT_APP_TX;
253 ed->data[1] = ctx->max_dequeue;
254 ed->data[2] = len_to_deq;
255 ed->data[3] = ctx->left_to_snd;
261 session_tx_not_ready (stream_session_t * s, u8 peek_data)
265 /* Can retransmit for closed sessions but can't send new data if
266 * session is not ready or closed */
267 if (s->session_state < SESSION_STATE_READY)
269 if (s->session_state == SESSION_STATE_CLOSED)
275 always_inline transport_connection_t *
276 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
280 return ctx->transport_vft->get_connection (ctx->s->connection_index,
281 ctx->s->thread_index);
285 if (ctx->s->session_state == SESSION_STATE_LISTENING)
286 return ctx->transport_vft->get_listener (ctx->s->connection_index);
289 return ctx->transport_vft->get_connection (ctx->s->connection_index,
290 ctx->s->thread_index);
296 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
297 u32 max_segs, u8 peek_data)
299 u32 n_bytes_per_buf, n_bytes_per_seg;
300 ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->server_tx_fifo);
303 /* Offset in rx fifo from where to peek data */
304 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
305 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
307 ctx->max_len_to_snd = 0;
310 ctx->max_dequeue -= ctx->tx_offset;
314 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
316 if (ctx->max_dequeue <= sizeof (ctx->hdr))
318 ctx->max_len_to_snd = 0;
321 svm_fifo_peek (ctx->s->server_tx_fifo, 0, sizeof (ctx->hdr),
323 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
324 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
327 ASSERT (ctx->max_dequeue > 0);
329 /* Ensure we're not writing more than transport window allows */
330 if (ctx->max_dequeue < ctx->snd_space)
332 /* Constrained by tx queue. Try to send only fully formed segments */
333 ctx->max_len_to_snd =
334 (ctx->max_dequeue > ctx->snd_mss) ?
335 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
340 /* Expectation is that snd_space0 is already a multiple of snd_mss */
341 ctx->max_len_to_snd = ctx->snd_space;
344 /* Check if we're tx constrained by the node */
345 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
346 if (ctx->n_segs_per_evt > max_segs)
348 ctx->n_segs_per_evt = max_segs;
349 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
352 n_bytes_per_buf = vlib_buffer_free_list_buffer_size (vm,
353 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
354 ASSERT (n_bytes_per_buf > MAX_HDRS_LEN);
355 n_bytes_per_seg = MAX_HDRS_LEN + ctx->snd_mss;
356 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
357 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
358 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
359 n_bytes_per_buf - MAX_HDRS_LEN);
363 session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
364 session_fifo_event_t * e,
365 stream_session_t * s, int *n_tx_packets,
368 u32 next_index, next0, next1, *to_next, n_left_to_next;
369 u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
370 u32 thread_index = s->thread_index, n_left, pbi;
371 session_manager_main_t *smm = &session_manager_main;
372 session_tx_context_t *ctx = &smm->ctx[thread_index];
373 transport_proto_t tp;
377 if (PREDICT_FALSE ((rv = session_tx_not_ready (s, peek_data))))
380 vec_add1 (smm->pending_event_vector[thread_index], *e);
384 next_index = smm->session_type_to_next[s->session_type];
385 next0 = next1 = next_index;
387 tp = session_get_transport_proto (s);
389 ctx->transport_vft = transport_protocol_get_vft (tp);
390 ctx->tc = session_tx_get_transport (ctx, peek_data);
391 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
392 ctx->snd_space = ctx->transport_vft->send_space (ctx->tc);
393 if (ctx->snd_space == 0 || ctx->snd_mss == 0)
395 vec_add1 (smm->pending_event_vector[thread_index], *e);
399 /* Allow enqueuing of a new event */
400 svm_fifo_unset_event (s->server_tx_fifo);
402 /* Check how much we can pull. */
403 session_tx_set_dequeue_params (vm, ctx, VLIB_FRAME_SIZE - *n_tx_packets,
406 if (PREDICT_FALSE (!ctx->max_len_to_snd))
409 n_bufs = vec_len (smm->tx_buffers[thread_index]);
410 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
413 * Make sure we have at least one full frame of buffers ready
415 if (n_bufs < n_bufs_needed)
417 session_output_try_get_buffers (vm, smm, thread_index, &n_bufs,
418 ctx->n_bufs_per_seg * VLIB_FRAME_SIZE);
419 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
421 vec_add1 (smm->pending_event_vector[thread_index], *e);
427 * Write until we fill up a frame
429 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
430 if (PREDICT_FALSE (ctx->n_segs_per_evt > n_left_to_next))
432 ctx->n_segs_per_evt = n_left_to_next;
433 ctx->max_len_to_snd = ctx->snd_mss * n_left_to_next;
435 ctx->left_to_snd = ctx->max_len_to_snd;
436 n_left = ctx->n_segs_per_evt;
440 vlib_buffer_t *b0, *b1;
443 pbi = smm->tx_buffers[thread_index][n_bufs - 3];
444 pb = vlib_get_buffer (vm, pbi);
445 vlib_prefetch_buffer_header (pb, STORE);
446 pbi = smm->tx_buffers[thread_index][n_bufs - 4];
447 pb = vlib_get_buffer (vm, pbi);
448 vlib_prefetch_buffer_header (pb, STORE);
450 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
451 to_next[1] = bi1 = smm->tx_buffers[thread_index][--n_bufs];
453 b0 = vlib_get_buffer (vm, bi0);
454 b1 = vlib_get_buffer (vm, bi1);
456 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
457 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
459 ctx->transport_vft->push_header (ctx->tc, b0);
460 ctx->transport_vft->push_header (ctx->tc, b1);
466 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
467 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
469 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
470 n_left_to_next, bi0, bi1, next0,
478 ASSERT (n_bufs >= 1);
479 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
480 b0 = vlib_get_buffer (vm, bi0);
481 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
483 /* Ask transport to push header after current_length and
484 * total_length_not_including_first_buffer are updated */
485 ctx->transport_vft->push_header (ctx->tc, b0);
491 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
493 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
494 n_left_to_next, bi0, next0);
497 if (PREDICT_FALSE (n_trace > 0))
498 session_tx_trace_frame (vm, node, next_index, to_next,
499 ctx->n_segs_per_evt, s, n_trace);
501 _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
502 *n_tx_packets += ctx->n_segs_per_evt;
503 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
505 /* If we couldn't dequeue all bytes mark as partially read */
506 ASSERT (ctx->left_to_snd == 0);
507 if (ctx->max_len_to_snd < ctx->max_dequeue)
508 if (svm_fifo_set_event (s->server_tx_fifo))
509 vec_add1 (smm->pending_event_vector[thread_index], *e);
511 if (!peek_data && ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
513 /* Fix dgram pre header */
514 if (ctx->max_len_to_snd < ctx->max_dequeue)
515 svm_fifo_overwrite_head (s->server_tx_fifo, (u8 *) & ctx->hdr,
516 sizeof (session_dgram_pre_hdr_t));
517 /* More data needs to be read */
518 else if (svm_fifo_max_dequeue (s->server_tx_fifo) > 0)
519 if (svm_fifo_set_event (s->server_tx_fifo))
520 vec_add1 (smm->pending_event_vector[thread_index], *e);
526 session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
527 session_fifo_event_t * e0,
528 stream_session_t * s0, int *n_tx_pkts)
530 return session_tx_fifo_read_and_snd_i (vm, node, e0, s0, n_tx_pkts, 1);
534 session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
535 session_fifo_event_t * e0,
536 stream_session_t * s0, int *n_tx_pkts)
538 return session_tx_fifo_read_and_snd_i (vm, node, e0, s0, n_tx_pkts, 0);
542 session_tx_fifo_dequeue_internal (vlib_main_t * vm,
543 vlib_node_runtime_t * node,
544 session_fifo_event_t * e0,
545 stream_session_t * s0, int *n_tx_pkts)
548 app = application_get (s0->opaque);
549 svm_fifo_unset_event (s0->server_tx_fifo);
550 return app->cb_fns.builtin_app_tx_callback (s0);
553 always_inline stream_session_t *
554 session_event_get_session (session_fifo_event_t * e, u8 thread_index)
556 return session_get_if_valid (e->fifo->master_session_index, thread_index);
560 dump_thread_0_event_queue (void)
562 session_manager_main_t *smm = vnet_get_session_manager_main ();
563 vlib_main_t *vm = &vlib_global_main;
564 u32 my_thread_index = vm->thread_index;
565 session_fifo_event_t _e, *e = &_e;
566 stream_session_t *s0;
571 q = smm->vpp_event_queues[my_thread_index];
575 for (i = 0; i < q->cursize; i++)
577 headp = (i8 *) (&q->data[0] + q->elsize * index);
578 clib_memcpy (e, headp, q->elsize);
580 switch (e->event_type)
582 case FIFO_EVENT_APP_TX:
583 s0 = session_event_get_session (e, my_thread_index);
584 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
587 case FIFO_EVENT_DISCONNECT:
588 s0 = session_get_from_handle (e->session_handle);
589 fformat (stdout, "[%04d] disconnect session %d\n", i,
593 case FIFO_EVENT_BUILTIN_RX:
594 s0 = session_event_get_session (e, my_thread_index);
595 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
599 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
600 i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
604 fformat (stdout, "[%04d] unhandled event type %d\n",
611 if (index == q->maxsize)
617 session_node_cmp_event (session_fifo_event_t * e, svm_fifo_t * f)
620 switch (e->event_type)
622 case FIFO_EVENT_APP_RX:
623 case FIFO_EVENT_APP_TX:
624 case FIFO_EVENT_BUILTIN_RX:
628 case FIFO_EVENT_DISCONNECT:
631 s = session_get_from_handle (e->session_handle);
634 clib_warning ("session has event but doesn't exist!");
637 if (s->server_rx_fifo == f || s->server_tx_fifo == f)
647 session_node_lookup_fifo_event (svm_fifo_t * f, session_fifo_event_t * e)
649 session_manager_main_t *smm = vnet_get_session_manager_main ();
651 session_fifo_event_t *pending_event_vector, *evt;
652 int i, index, found = 0;
657 thread_index = f->master_thread_index;
661 q = smm->vpp_event_queues[thread_index];
663 for (i = 0; i < q->cursize; i++)
665 headp = (i8 *) (&q->data[0] + q->elsize * index);
666 clib_memcpy (e, headp, q->elsize);
667 found = session_node_cmp_event (e, f);
670 if (++index == q->maxsize)
674 * Search pending events vector
676 pending_event_vector = smm->pending_event_vector[thread_index];
677 vec_foreach (evt, pending_event_vector)
679 found = session_node_cmp_event (evt, f);
682 clib_memcpy (e, evt, sizeof (*evt));
690 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
691 vlib_frame_t * frame)
693 session_manager_main_t *smm = vnet_get_session_manager_main ();
694 session_fifo_event_t *my_pending_event_vector, *e;
695 session_fifo_event_t *my_fifo_events;
696 u32 n_to_dequeue, n_events;
699 int n_tx_packets = 0;
700 u32 thread_index = vm->thread_index;
702 f64 now = vlib_time_now (vm);
705 SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, thread_index);
708 * Update transport time
710 transport_update_time (now, thread_index);
713 * Get vpp queue events
715 q = smm->vpp_event_queues[thread_index];
716 if (PREDICT_FALSE (q == 0))
719 my_fifo_events = smm->free_event_vector[thread_index];
721 /* min number of events we can dequeue without blocking */
722 n_to_dequeue = q->cursize;
723 my_pending_event_vector = smm->pending_event_vector[thread_index];
725 if (!n_to_dequeue && !vec_len (my_pending_event_vector)
726 && !vec_len (smm->pending_disconnects[thread_index]))
729 SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
732 * If we didn't manage to process previous events try going
733 * over them again without dequeuing new ones.
735 /* XXX: Block senders to sessions that can't keep up */
736 if (0 && vec_len (my_pending_event_vector) >= 100)
738 clib_warning ("too many fifo events unsolved");
742 /* See you in the next life, don't be late */
743 if (pthread_mutex_trylock (&q->mutex))
746 for (i = 0; i < n_to_dequeue; i++)
748 vec_add2 (my_fifo_events, e, 1);
749 svm_queue_sub_raw (q, (u8 *) e);
752 /* The other side of the connection is not polling */
753 if (q->cursize < (q->maxsize / 8))
754 (void) pthread_cond_broadcast (&q->condvar);
755 pthread_mutex_unlock (&q->mutex);
757 vec_append (my_fifo_events, my_pending_event_vector);
758 vec_append (my_fifo_events, smm->pending_disconnects[thread_index]);
760 _vec_len (my_pending_event_vector) = 0;
761 smm->pending_event_vector[thread_index] = my_pending_event_vector;
762 _vec_len (smm->pending_disconnects[thread_index]) = 0;
765 n_events = vec_len (my_fifo_events);
766 for (i = 0; i < n_events; i++)
768 stream_session_t *s0; /* $$$ prefetch 1 ahead maybe */
769 session_fifo_event_t *e0;
771 e0 = &my_fifo_events[i];
772 switch (e0->event_type)
774 case FIFO_EVENT_APP_TX:
775 if (n_tx_packets == VLIB_FRAME_SIZE)
777 vec_add1 (smm->pending_event_vector[thread_index], *e0);
781 s0 = session_event_get_session (e0, thread_index);
782 if (PREDICT_FALSE (!s0))
784 clib_warning ("It's dead, Jim!");
788 /* Spray packets in per session type frames, since they go to
790 rv = (smm->session_tx_fns[s0->session_type]) (vm, node, e0, s0,
793 if (PREDICT_FALSE (rv < 0))
795 vlib_node_increment_counter (vm, node->node_index,
796 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
800 case FIFO_EVENT_DISCONNECT:
801 /* Make sure stream disconnects run after the pending list is
803 s0 = session_get_from_handle (e0->session_handle);
807 vec_add1 (smm->pending_disconnects[thread_index], *e0);
810 /* If tx queue is still not empty, wait */
811 if (svm_fifo_max_dequeue (s0->server_tx_fifo))
813 vec_add1 (smm->pending_disconnects[thread_index], *e0);
817 stream_session_disconnect_transport (s0);
819 case FIFO_EVENT_BUILTIN_RX:
820 s0 = session_event_get_session (e0, thread_index);
821 if (PREDICT_FALSE (!s0))
823 svm_fifo_unset_event (s0->server_rx_fifo);
824 app = application_get (s0->app_index);
825 app->cb_fns.builtin_app_rx_callback (s0);
828 fp = e0->rpc_args.fp;
829 (*fp) (e0->rpc_args.arg);
833 clib_warning ("unhandled event type %d", e0->event_type);
837 _vec_len (my_fifo_events) = 0;
838 smm->free_event_vector[thread_index] = my_fifo_events;
840 vlib_node_increment_counter (vm, session_queue_node.index,
841 SESSION_QUEUE_ERROR_TX, n_tx_packets);
843 SESSION_EVT_DBG (SESSION_EVT_DISPATCH_END, smm, thread_index);
849 VLIB_REGISTER_NODE (session_queue_node) =
851 .function = session_queue_node_fn,
852 .name = "session-queue",
853 .format_trace = format_session_queue_trace,
854 .type = VLIB_NODE_TYPE_INPUT,
855 .n_errors = ARRAY_LEN (session_queue_error_strings),
856 .error_strings = session_queue_error_strings,
857 .state = VLIB_NODE_STATE_DISABLED,
861 static clib_error_t *
862 session_queue_exit (vlib_main_t * vm)
864 if (vec_len (vlib_mains) < 2)
868 * Shut off (especially) worker-thread session nodes.
869 * Otherwise, vpp can crash as the main thread unmaps the
872 vlib_worker_thread_barrier_sync (vm);
873 session_node_enable_disable (0 /* is_enable */ );
874 vlib_worker_thread_barrier_release (vm);
878 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
881 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
884 f64 now, timeout = 1.0;
885 uword *event_data = 0;
890 vlib_process_wait_for_event_or_clock (vm, timeout);
891 now = vlib_time_now (vm);
892 event_type = vlib_process_get_events (vm, (uword **) & event_data);
896 case SESSION_Q_PROCESS_FLUSH_FRAMES:
897 /* Flush the frames by updating all transports times */
898 transport_update_time (now, 0);
900 case SESSION_Q_PROCESS_STOP:
904 /* Timed out. Update time for all transports to trigger all
905 * outstanding retransmits. */
906 transport_update_time (now, 0);
909 vec_reset_length (event_data);
915 VLIB_REGISTER_NODE (session_queue_process_node) =
917 .function = session_queue_process,
918 .type = VLIB_NODE_TYPE_PROCESS,
919 .name = "session-queue-process",
920 .state = VLIB_NODE_STATE_DISABLED,
926 * fd.io coding-style-patch-verification: ON
929 * eval: (c-set-style "gnu")