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_buffer (vlib_main_t * vm, vlib_node_runtime_t * node,
70 u32 next_index, vlib_buffer_t * b,
71 stream_session_t * s, u32 * n_trace)
73 session_queue_trace_t *t;
74 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
75 vlib_set_trace_count (vm, node, --*n_trace);
76 t = vlib_add_trace (vm, node, b, sizeof (*t));
77 t->session_index = s->session_index;
78 t->server_thread_index = s->thread_index;
82 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
83 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
85 session_manager_main_t *smm = &session_manager_main;
86 vlib_buffer_t *chain_b, *prev_b;
87 u32 chain_bi0, to_deq, left_from_seg;
88 u16 len_to_deq, n_bytes_read;
91 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
92 b->total_length_not_including_first_buffer = 0;
95 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
97 to_deq = left_from_seg;
98 for (j = 1; j < ctx->n_bufs_per_seg; j++)
101 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
104 chain_bi0 = smm->tx_buffers[ctx->s->thread_index][*n_bufs];
105 _vec_len (smm->tx_buffers[ctx->s->thread_index]) = *n_bufs;
107 chain_b = vlib_get_buffer (vm, chain_bi0);
108 chain_b->current_data = 0;
109 data = vlib_buffer_get_current (chain_b);
112 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo,
113 ctx->tx_offset, len_to_deq, data);
114 ctx->tx_offset += n_bytes_read;
118 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
120 svm_fifo_t *f = ctx->s->server_tx_fifo;
121 session_dgram_hdr_t *hdr = &ctx->hdr;
123 deq_now = clib_min (hdr->data_length - hdr->data_offset,
125 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
127 ASSERT (n_bytes_read > 0);
129 hdr->data_offset += n_bytes_read;
130 if (hdr->data_offset == hdr->data_length)
131 svm_fifo_dequeue_drop (f, hdr->data_length);
134 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
137 ASSERT (n_bytes_read == len_to_deq);
138 chain_b->current_length = n_bytes_read;
139 b->total_length_not_including_first_buffer += chain_b->current_length;
141 /* update previous buffer */
142 prev_b->next_buffer = chain_bi0;
143 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
145 /* update current buffer */
146 chain_b->next_buffer = 0;
148 to_deq -= n_bytes_read;
153 && b->total_length_not_including_first_buffer == left_from_seg);
154 ctx->left_to_snd -= left_from_seg;
158 session_output_try_get_buffers (vlib_main_t * vm,
159 session_manager_main_t * smm,
160 u32 thread_index, u16 * n_bufs, u32 wanted)
162 u32 bufs_alloc = 0, bufs_now;
163 vec_validate_aligned (smm->tx_buffers[thread_index], *n_bufs + wanted - 1,
164 CLIB_CACHE_LINE_BYTES);
168 vlib_buffer_alloc (vm,
169 &smm->tx_buffers[thread_index][*n_bufs +
171 wanted - bufs_alloc);
172 bufs_alloc += bufs_now;
174 while (bufs_now > 0 && ((bufs_alloc + *n_bufs < wanted)));
176 *n_bufs += bufs_alloc;
177 _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
182 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
183 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
190 * Start with the first buffer in chain
193 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
195 b->total_length_not_including_first_buffer = 0;
197 data0 = vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
198 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
202 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo, ctx->tx_offset,
204 ASSERT (n_bytes_read > 0);
205 /* Keep track of progress locally, transport is also supposed to
206 * increment it independently when pushing the header */
207 ctx->tx_offset += n_bytes_read;
211 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
213 session_dgram_hdr_t *hdr = &ctx->hdr;
214 svm_fifo_t *f = ctx->s->server_tx_fifo;
218 ASSERT (hdr->data_length > hdr->data_offset);
219 deq_now = clib_min (hdr->data_length - hdr->data_offset,
221 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
222 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
223 ASSERT (n_bytes_read > 0);
225 if (ctx->s->session_state == SESSION_STATE_LISTENING)
227 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
228 ctx->tc->rmt_port = hdr->rmt_port;
230 hdr->data_offset += n_bytes_read;
231 if (hdr->data_offset == hdr->data_length)
233 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
234 svm_fifo_dequeue_drop (f, offset);
239 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
241 ASSERT (n_bytes_read > 0);
244 b->current_length = n_bytes_read;
245 ctx->left_to_snd -= n_bytes_read;
248 * Fill in the remaining buffers in the chain, if any
250 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
251 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
254 SESSION_EVT_DBG(SESSION_EVT_DEQ, s, ({
255 ed->data[0] = e->event_type;
256 ed->data[1] = max_dequeue;
257 ed->data[2] = len_to_deq;
258 ed->data[3] = left_to_snd;
264 session_tx_not_ready (stream_session_t * s, u8 peek_data)
268 /* Can retransmit for closed sessions but can't send new data if
269 * session is not ready or closed */
270 if (s->session_state < SESSION_STATE_READY)
276 always_inline transport_connection_t *
277 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
281 return ctx->transport_vft->get_connection (ctx->s->connection_index,
282 ctx->s->thread_index);
286 if (ctx->s->session_state == SESSION_STATE_LISTENING)
287 return ctx->transport_vft->get_listener (ctx->s->connection_index);
290 return ctx->transport_vft->get_connection (ctx->s->connection_index,
291 ctx->s->thread_index);
297 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
300 u32 n_bytes_per_buf, n_bytes_per_seg;
301 ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->server_tx_fifo);
304 /* Offset in rx fifo from where to peek data */
305 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
306 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
308 ctx->max_len_to_snd = 0;
311 ctx->max_dequeue -= ctx->tx_offset;
315 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
317 if (ctx->max_dequeue <= sizeof (ctx->hdr))
319 ctx->max_len_to_snd = 0;
322 svm_fifo_peek (ctx->s->server_tx_fifo, 0, sizeof (ctx->hdr),
324 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
325 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
328 ASSERT (ctx->max_dequeue > 0);
330 /* Ensure we're not writing more than transport window allows */
331 if (ctx->max_dequeue < ctx->snd_space)
333 /* Constrained by tx queue. Try to send only fully formed segments */
334 ctx->max_len_to_snd =
335 (ctx->max_dequeue > ctx->snd_mss) ?
336 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
341 /* Expectation is that snd_space0 is already a multiple of snd_mss */
342 ctx->max_len_to_snd = ctx->snd_space;
345 n_bytes_per_buf = vlib_buffer_free_list_buffer_size (vm,
346 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
347 ASSERT (n_bytes_per_buf > MAX_HDRS_LEN);
348 n_bytes_per_seg = MAX_HDRS_LEN + ctx->snd_mss;
349 ctx->n_bufs_per_seg = ceil ((double) n_bytes_per_seg / n_bytes_per_buf);
350 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
351 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
352 n_bytes_per_buf - MAX_HDRS_LEN);
356 session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
357 session_fifo_event_t * e,
358 stream_session_t * s, int *n_tx_packets,
361 u32 next_index, next0, next1, next2, next3, *to_next, n_left_to_next;
362 u32 n_trace = vlib_get_trace_count (vm, node), n_packets = 0, pbi;
363 u32 n_bufs_per_frame, thread_index = s->thread_index;
364 session_manager_main_t *smm = &session_manager_main;
365 session_tx_context_t *ctx = &smm->ctx[thread_index];
366 transport_proto_t tp;
370 if (PREDICT_FALSE (session_tx_not_ready (s, peek_data)))
372 vec_add1 (smm->pending_event_vector[thread_index], *e);
376 next_index = smm->session_type_to_next[s->session_type];
377 next0 = next1 = next2 = next3 = next_index;
379 tp = session_get_transport_proto (s);
381 ctx->transport_vft = transport_protocol_get_vft (tp);
382 ctx->tc = session_tx_get_transport (ctx, peek_data);
383 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
384 ctx->snd_space = ctx->transport_vft->send_space (ctx->tc);
385 if (ctx->snd_space == 0 || ctx->snd_mss == 0)
387 vec_add1 (smm->pending_event_vector[thread_index], *e);
391 /* Allow enqueuing of a new event */
392 svm_fifo_unset_event (s->server_tx_fifo);
394 /* Check how much we can pull. */
395 session_tx_set_dequeue_params (vm, ctx, peek_data);
396 if (PREDICT_FALSE (!ctx->max_len_to_snd))
399 n_bufs = vec_len (smm->tx_buffers[thread_index]);
400 ctx->left_to_snd = ctx->max_len_to_snd;
403 * Make sure we have at least one full frame of buffers ready
405 n_bufs_per_frame = ctx->n_bufs_per_seg * VLIB_FRAME_SIZE;
406 if (n_bufs < n_bufs_per_frame)
408 session_output_try_get_buffers (vm, smm, thread_index, &n_bufs,
410 if (PREDICT_FALSE (n_bufs < n_bufs_per_frame))
412 vec_add1 (smm->pending_event_vector[thread_index], *e);
418 * Write until we fill up a frame
420 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
421 while (ctx->left_to_snd && n_left_to_next)
423 while (ctx->left_to_snd > 3 * ctx->snd_mss && n_left_to_next >= 4)
425 vlib_buffer_t *b0, *b1;
428 pbi = smm->tx_buffers[thread_index][n_bufs - 3];
429 pb = vlib_get_buffer (vm, pbi);
430 vlib_prefetch_buffer_header (pb, STORE);
431 pbi = smm->tx_buffers[thread_index][n_bufs - 4];
432 pb = vlib_get_buffer (vm, pbi);
433 vlib_prefetch_buffer_header (pb, STORE);
435 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
436 to_next[1] = bi1 = smm->tx_buffers[thread_index][--n_bufs];
438 b0 = vlib_get_buffer (vm, bi0);
439 b1 = vlib_get_buffer (vm, bi1);
441 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
442 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
444 ctx->transport_vft->push_header (ctx->tc, b0);
445 ctx->transport_vft->push_header (ctx->tc, b1);
451 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
452 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
454 if (PREDICT_FALSE (n_trace > 0))
456 session_tx_trace_buffer (vm, node, next_index, b0, s, &n_trace);
458 session_tx_trace_buffer (vm, node, next_index, b1, s,
462 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
463 n_left_to_next, bi0, bi1,
466 while (ctx->left_to_snd && n_left_to_next)
471 ASSERT (n_bufs >= 1);
472 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
473 b0 = vlib_get_buffer (vm, bi0);
474 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
476 /* Ask transport to push header after current_length and
477 * total_length_not_including_first_buffer are updated */
478 ctx->transport_vft->push_header (ctx->tc, b0);
484 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
485 if (PREDICT_FALSE (n_trace > 0))
486 session_tx_trace_buffer (vm, node, next_index, b0, s, &n_trace);
488 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
489 n_left_to_next, bi0, next0);
492 _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
493 *n_tx_packets += n_packets;
494 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
496 /* If we couldn't dequeue all bytes mark as partially read */
497 if (ctx->max_len_to_snd < ctx->max_dequeue)
498 if (svm_fifo_set_event (s->server_tx_fifo))
499 vec_add1 (smm->pending_event_vector[thread_index], *e);
501 if (!peek_data && ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
503 /* Fix dgram pre header */
504 if (ctx->max_len_to_snd < ctx->max_dequeue)
505 svm_fifo_overwrite_head (s->server_tx_fifo, (u8 *) & ctx->hdr,
506 sizeof (session_dgram_pre_hdr_t));
507 /* More data needs to be read */
508 else if (svm_fifo_max_dequeue (s->server_tx_fifo) > 0)
509 if (svm_fifo_set_event (s->server_tx_fifo))
510 vec_add1 (smm->pending_event_vector[thread_index], *e);
516 session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
517 session_fifo_event_t * e0,
518 stream_session_t * s0, int *n_tx_pkts)
520 return session_tx_fifo_read_and_snd_i (vm, node, e0, s0, n_tx_pkts, 1);
524 session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
525 session_fifo_event_t * e0,
526 stream_session_t * s0, int *n_tx_pkts)
528 return session_tx_fifo_read_and_snd_i (vm, node, e0, s0, n_tx_pkts, 0);
532 session_tx_fifo_dequeue_internal (vlib_main_t * vm,
533 vlib_node_runtime_t * node,
534 session_fifo_event_t * e0,
535 stream_session_t * s0, int *n_tx_pkts)
538 app = application_get (s0->opaque);
539 svm_fifo_unset_event (s0->server_tx_fifo);
540 return app->cb_fns.builtin_app_tx_callback (s0);
543 always_inline stream_session_t *
544 session_event_get_session (session_fifo_event_t * e, u8 thread_index)
546 return session_get_if_valid (e->fifo->master_session_index, thread_index);
550 dump_thread_0_event_queue (void)
552 session_manager_main_t *smm = vnet_get_session_manager_main ();
553 vlib_main_t *vm = &vlib_global_main;
554 u32 my_thread_index = vm->thread_index;
555 session_fifo_event_t _e, *e = &_e;
556 stream_session_t *s0;
561 q = smm->vpp_event_queues[my_thread_index];
565 for (i = 0; i < q->cursize; i++)
567 headp = (i8 *) (&q->data[0] + q->elsize * index);
568 clib_memcpy (e, headp, q->elsize);
570 switch (e->event_type)
572 case FIFO_EVENT_APP_TX:
573 s0 = session_event_get_session (e, my_thread_index);
574 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
577 case FIFO_EVENT_DISCONNECT:
578 s0 = session_get_from_handle (e->session_handle);
579 fformat (stdout, "[%04d] disconnect session %d\n", i,
583 case FIFO_EVENT_BUILTIN_RX:
584 s0 = session_event_get_session (e, my_thread_index);
585 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
589 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
590 i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
594 fformat (stdout, "[%04d] unhandled event type %d\n",
601 if (index == q->maxsize)
607 session_node_cmp_event (session_fifo_event_t * e, svm_fifo_t * f)
610 switch (e->event_type)
612 case FIFO_EVENT_APP_RX:
613 case FIFO_EVENT_APP_TX:
614 case FIFO_EVENT_BUILTIN_RX:
618 case FIFO_EVENT_DISCONNECT:
621 s = session_get_from_handle (e->session_handle);
624 clib_warning ("session has event but doesn't exist!");
627 if (s->server_rx_fifo == f || s->server_tx_fifo == f)
637 session_node_lookup_fifo_event (svm_fifo_t * f, session_fifo_event_t * e)
639 session_manager_main_t *smm = vnet_get_session_manager_main ();
641 session_fifo_event_t *pending_event_vector, *evt;
642 int i, index, found = 0;
647 thread_index = f->master_thread_index;
651 q = smm->vpp_event_queues[thread_index];
653 for (i = 0; i < q->cursize; i++)
655 headp = (i8 *) (&q->data[0] + q->elsize * index);
656 clib_memcpy (e, headp, q->elsize);
657 found = session_node_cmp_event (e, f);
660 if (++index == q->maxsize)
664 * Search pending events vector
666 pending_event_vector = smm->pending_event_vector[thread_index];
667 vec_foreach (evt, pending_event_vector)
669 found = session_node_cmp_event (evt, f);
672 clib_memcpy (e, evt, sizeof (*evt));
680 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
681 vlib_frame_t * frame)
683 session_manager_main_t *smm = vnet_get_session_manager_main ();
684 session_fifo_event_t *my_pending_event_vector, *pending_disconnects, *e;
685 session_fifo_event_t *my_fifo_events;
686 u32 n_to_dequeue, n_events;
689 int n_tx_packets = 0;
690 u32 my_thread_index = vm->thread_index;
692 f64 now = vlib_time_now (vm);
695 SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, my_thread_index);
698 * Update transport time
700 transport_update_time (now, my_thread_index);
703 * Get vpp queue events
705 q = smm->vpp_event_queues[my_thread_index];
706 if (PREDICT_FALSE (q == 0))
709 my_fifo_events = smm->free_event_vector[my_thread_index];
711 /* min number of events we can dequeue without blocking */
712 n_to_dequeue = q->cursize;
713 my_pending_event_vector = smm->pending_event_vector[my_thread_index];
714 pending_disconnects = smm->pending_disconnects[my_thread_index];
716 if (!n_to_dequeue && !vec_len (my_pending_event_vector)
717 && !vec_len (pending_disconnects))
720 SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
723 * If we didn't manage to process previous events try going
724 * over them again without dequeuing new ones.
726 /* XXX: Block senders to sessions that can't keep up */
727 if (0 && vec_len (my_pending_event_vector) >= 100)
729 clib_warning ("too many fifo events unsolved");
733 /* See you in the next life, don't be late */
734 if (pthread_mutex_trylock (&q->mutex))
737 for (i = 0; i < n_to_dequeue; i++)
739 vec_add2 (my_fifo_events, e, 1);
740 svm_queue_sub_raw (q, (u8 *) e);
743 /* The other side of the connection is not polling */
744 if (q->cursize < (q->maxsize / 8))
745 (void) pthread_cond_broadcast (&q->condvar);
746 pthread_mutex_unlock (&q->mutex);
748 vec_append (my_fifo_events, my_pending_event_vector);
749 vec_append (my_fifo_events, smm->pending_disconnects[my_thread_index]);
751 _vec_len (my_pending_event_vector) = 0;
752 smm->pending_event_vector[my_thread_index] = my_pending_event_vector;
753 _vec_len (smm->pending_disconnects[my_thread_index]) = 0;
756 n_events = vec_len (my_fifo_events);
757 for (i = 0; i < n_events; i++)
759 stream_session_t *s0; /* $$$ prefetch 1 ahead maybe */
760 session_fifo_event_t *e0;
762 e0 = &my_fifo_events[i];
764 switch (e0->event_type)
766 case FIFO_EVENT_APP_TX:
767 s0 = session_event_get_session (e0, my_thread_index);
769 if (PREDICT_FALSE (!s0))
771 clib_warning ("It's dead, Jim!");
774 /* Spray packets in per session type frames, since they go to
776 rv = (smm->session_tx_fns[s0->session_type]) (vm, node, e0, s0,
779 if (PREDICT_FALSE (rv < 0))
781 vlib_node_increment_counter (vm, node->node_index,
782 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
786 case FIFO_EVENT_DISCONNECT:
787 /* Make sure disconnects run after the pending list is drained */
788 s0 = session_get_from_handle (e0->session_handle);
789 if (!e0->postponed || svm_fifo_max_dequeue (s0->server_tx_fifo))
792 vec_add1 (smm->pending_disconnects[my_thread_index], *e0);
795 stream_session_disconnect_transport (s0);
797 case FIFO_EVENT_BUILTIN_RX:
798 s0 = session_event_get_session (e0, my_thread_index);
799 if (PREDICT_FALSE (!s0))
801 svm_fifo_unset_event (s0->server_rx_fifo);
802 app = application_get (s0->app_index);
803 app->cb_fns.builtin_app_rx_callback (s0);
806 fp = e0->rpc_args.fp;
807 (*fp) (e0->rpc_args.arg);
811 clib_warning ("unhandled event type %d", e0->event_type);
815 _vec_len (my_fifo_events) = 0;
816 smm->free_event_vector[my_thread_index] = my_fifo_events;
818 vlib_node_increment_counter (vm, session_queue_node.index,
819 SESSION_QUEUE_ERROR_TX, n_tx_packets);
821 SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 1);
827 VLIB_REGISTER_NODE (session_queue_node) =
829 .function = session_queue_node_fn,
830 .name = "session-queue",
831 .format_trace = format_session_queue_trace,
832 .type = VLIB_NODE_TYPE_INPUT,
833 .n_errors = ARRAY_LEN (session_queue_error_strings),
834 .error_strings = session_queue_error_strings,
835 .state = VLIB_NODE_STATE_DISABLED,
839 static clib_error_t *
840 session_queue_exit (vlib_main_t * vm)
842 if (vec_len (vlib_mains) < 2)
846 * Shut off (especially) worker-thread session nodes.
847 * Otherwise, vpp can crash as the main thread unmaps the
850 vlib_worker_thread_barrier_sync (vm);
851 session_node_enable_disable (0 /* is_enable */ );
852 vlib_worker_thread_barrier_release (vm);
856 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
859 * fd.io coding-style-patch-verification: ON
862 * eval: (c-set-style "gnu")