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_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_index != mp->context)
67 clib_warning ("app doesn't own session");
70 s->session_state = SESSION_STATE_READY;
75 session_mq_reset_reply_handler (void *data)
77 session_reset_reply_msg_t *mp;
80 u32 index, thread_index;
82 mp = (session_reset_reply_msg_t *) data;
83 app = application_lookup (mp->client_index);
87 session_parse_handle (mp->handle, &index, &thread_index);
88 s = session_get_if_valid (index, thread_index);
89 if (s == 0 || app->index != s->app_index)
91 clib_warning ("Invalid session!");
95 /* Client objected to resetting the session, log and continue */
98 clib_warning ("client retval %d", mp->retval);
102 /* This comes as a response to a reset, transport only waiting for
103 * confirmation to remove connection state, no need to disconnect */
104 stream_session_cleanup (s);
108 session_mq_disconnected_handler (void *data)
110 session_disconnected_reply_msg_t *rmp;
111 vnet_disconnect_args_t _a, *a = &_a;
112 svm_msg_q_msg_t _msg, *msg = &_msg;
113 session_disconnected_msg_t *mp;
114 session_event_t *evt;
119 mp = (session_disconnected_msg_t *) data;
120 app = application_lookup (mp->client_index);
121 s = session_get_from_handle_if_valid (mp->handle);
122 if (!(app && s && s->app_index == app->index))
124 clib_warning ("could not disconnect session: %llu app: %u", mp->handle,
129 a->handle = mp->handle;
130 a->app_index = app->index;
131 rv = vnet_disconnect_session (a);
133 svm_msg_q_lock_and_alloc_msg_w_ring (app->event_queue,
134 SESSION_MQ_CTRL_EVT_RING,
136 svm_msg_q_unlock (app->event_queue);
137 evt = svm_msg_q_msg_data (app->event_queue, msg);
138 memset (evt, 0, sizeof (*evt));
139 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED;
140 rmp = (session_disconnected_reply_msg_t *) evt->data;
141 rmp->handle = mp->handle;
142 rmp->context = mp->context;
144 svm_msg_q_add (app->event_queue, msg, SVM_Q_WAIT);
148 session_mq_disconnected_reply_handler (void *data)
150 session_disconnected_reply_msg_t *mp;
151 vnet_disconnect_args_t _a, *a = &_a;
154 mp = (session_disconnected_reply_msg_t *) data;
156 /* Client objected to disconnecting the session, log and continue */
159 clib_warning ("client retval %d", mp->retval);
163 /* Disconnect has been confirmed. Confirm close to transport */
164 app = application_lookup (mp->context);
167 a->handle = mp->handle;
168 a->app_index = app->index;
169 vnet_disconnect_session (a);
173 vlib_node_registration_t session_queue_node;
178 u32 server_thread_index;
179 } session_queue_trace_t;
181 /* packet trace format function */
183 format_session_queue_trace (u8 * s, va_list * args)
185 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
186 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
187 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
189 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
190 t->session_index, t->server_thread_index);
194 #define foreach_session_queue_error \
195 _(TX, "Packets transmitted") \
196 _(TIMER, "Timer events") \
197 _(NO_BUFFER, "Out of buffers")
201 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
202 foreach_session_queue_error
204 SESSION_QUEUE_N_ERROR,
205 } session_queue_error_t;
207 static char *session_queue_error_strings[] = {
208 #define _(sym,string) string,
209 foreach_session_queue_error
215 SESSION_TX_NO_BUFFERS = -2,
221 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
222 u32 next_index, u32 * to_next, u16 n_segs,
223 stream_session_t * s, u32 n_trace)
225 session_queue_trace_t *t;
229 for (i = 0; i < clib_min (n_trace, n_segs); i++)
231 b = vlib_get_buffer (vm, to_next[i - n_segs]);
232 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
233 t = vlib_add_trace (vm, node, b, sizeof (*t));
234 t->session_index = s->session_index;
235 t->server_thread_index = s->thread_index;
237 vlib_set_trace_count (vm, node, n_trace - i);
241 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
242 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
244 session_manager_main_t *smm = &session_manager_main;
245 vlib_buffer_t *chain_b, *prev_b;
246 u32 chain_bi0, to_deq, left_from_seg;
247 u16 len_to_deq, n_bytes_read;
250 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
251 b->total_length_not_including_first_buffer = 0;
254 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
256 to_deq = left_from_seg;
257 for (j = 1; j < ctx->n_bufs_per_seg; j++)
260 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
263 chain_bi0 = smm->tx_buffers[ctx->s->thread_index][*n_bufs];
264 _vec_len (smm->tx_buffers[ctx->s->thread_index]) = *n_bufs;
266 chain_b = vlib_get_buffer (vm, chain_bi0);
267 chain_b->current_data = 0;
268 data = vlib_buffer_get_current (chain_b);
271 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo,
272 ctx->tx_offset, len_to_deq, data);
273 ctx->tx_offset += n_bytes_read;
277 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
279 svm_fifo_t *f = ctx->s->server_tx_fifo;
280 session_dgram_hdr_t *hdr = &ctx->hdr;
282 deq_now = clib_min (hdr->data_length - hdr->data_offset,
284 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
286 ASSERT (n_bytes_read > 0);
288 hdr->data_offset += n_bytes_read;
289 if (hdr->data_offset == hdr->data_length)
290 svm_fifo_dequeue_drop (f, hdr->data_length);
293 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
296 ASSERT (n_bytes_read == len_to_deq);
297 chain_b->current_length = n_bytes_read;
298 b->total_length_not_including_first_buffer += chain_b->current_length;
300 /* update previous buffer */
301 prev_b->next_buffer = chain_bi0;
302 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
304 /* update current buffer */
305 chain_b->next_buffer = 0;
307 to_deq -= n_bytes_read;
312 && b->total_length_not_including_first_buffer == left_from_seg);
313 ctx->left_to_snd -= left_from_seg;
317 session_output_try_get_buffers (vlib_main_t * vm,
318 session_manager_main_t * smm,
319 u32 thread_index, u16 * n_bufs, u32 wanted)
322 vec_validate_aligned (smm->tx_buffers[thread_index], wanted - 1,
323 CLIB_CACHE_LINE_BYTES);
324 n_alloc = vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][*n_bufs],
327 _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
332 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
333 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
340 * Start with the first buffer in chain
343 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
346 data0 = vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
347 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
351 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo, ctx->tx_offset,
353 ASSERT (n_bytes_read > 0);
354 /* Keep track of progress locally, transport is also supposed to
355 * increment it independently when pushing the header */
356 ctx->tx_offset += n_bytes_read;
360 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
362 session_dgram_hdr_t *hdr = &ctx->hdr;
363 svm_fifo_t *f = ctx->s->server_tx_fifo;
367 ASSERT (hdr->data_length > hdr->data_offset);
368 deq_now = clib_min (hdr->data_length - hdr->data_offset,
370 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
371 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
372 ASSERT (n_bytes_read > 0);
374 if (ctx->s->session_state == SESSION_STATE_LISTENING)
376 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
377 ctx->tc->rmt_port = hdr->rmt_port;
379 hdr->data_offset += n_bytes_read;
380 if (hdr->data_offset == hdr->data_length)
382 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
383 svm_fifo_dequeue_drop (f, offset);
388 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
390 ASSERT (n_bytes_read > 0);
393 b->current_length = n_bytes_read;
394 ctx->left_to_snd -= n_bytes_read;
397 * Fill in the remaining buffers in the chain, if any
399 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
400 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
403 SESSION_EVT_DBG(SESSION_EVT_DEQ, ctx->s, ({
404 ed->data[0] = FIFO_EVENT_APP_TX;
405 ed->data[1] = ctx->max_dequeue;
406 ed->data[2] = len_to_deq;
407 ed->data[3] = ctx->left_to_snd;
413 session_tx_not_ready (stream_session_t * s, u8 peek_data)
417 /* Can retransmit for closed sessions but can't send new data if
418 * session is not ready or closed */
419 if (s->session_state < SESSION_STATE_READY)
421 if (s->session_state == SESSION_STATE_CLOSED)
427 always_inline transport_connection_t *
428 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
432 return ctx->transport_vft->get_connection (ctx->s->connection_index,
433 ctx->s->thread_index);
437 if (ctx->s->session_state == SESSION_STATE_LISTENING)
438 return ctx->transport_vft->get_listener (ctx->s->connection_index);
441 return ctx->transport_vft->get_connection (ctx->s->connection_index,
442 ctx->s->thread_index);
448 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
449 u32 max_segs, u8 peek_data)
451 u32 n_bytes_per_buf, n_bytes_per_seg;
452 ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->server_tx_fifo);
455 /* Offset in rx fifo from where to peek data */
456 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
457 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
459 ctx->max_len_to_snd = 0;
462 ctx->max_dequeue -= ctx->tx_offset;
466 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
468 if (ctx->max_dequeue <= sizeof (ctx->hdr))
470 ctx->max_len_to_snd = 0;
473 svm_fifo_peek (ctx->s->server_tx_fifo, 0, sizeof (ctx->hdr),
475 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
476 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
479 ASSERT (ctx->max_dequeue > 0);
481 /* Ensure we're not writing more than transport window allows */
482 if (ctx->max_dequeue < ctx->snd_space)
484 /* Constrained by tx queue. Try to send only fully formed segments */
485 ctx->max_len_to_snd =
486 (ctx->max_dequeue > ctx->snd_mss) ?
487 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
492 /* Expectation is that snd_space0 is already a multiple of snd_mss */
493 ctx->max_len_to_snd = ctx->snd_space;
496 /* Check if we're tx constrained by the node */
497 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
498 if (ctx->n_segs_per_evt > max_segs)
500 ctx->n_segs_per_evt = max_segs;
501 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
504 n_bytes_per_buf = vlib_buffer_free_list_buffer_size (vm,
505 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
506 ASSERT (n_bytes_per_buf > MAX_HDRS_LEN);
507 n_bytes_per_seg = MAX_HDRS_LEN + ctx->snd_mss;
508 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
509 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
510 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
511 n_bytes_per_buf - MAX_HDRS_LEN);
515 session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
517 stream_session_t * s, int *n_tx_packets,
520 u32 next_index, next0, next1, *to_next, n_left_to_next;
521 u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
522 u32 thread_index = s->thread_index, n_left, pbi;
523 session_manager_main_t *smm = &session_manager_main;
524 session_tx_context_t *ctx = &smm->ctx[thread_index];
525 transport_proto_t tp;
529 if (PREDICT_FALSE ((rv = session_tx_not_ready (s, peek_data))))
532 vec_add1 (smm->pending_event_vector[thread_index], *e);
533 return SESSION_TX_NO_DATA;
536 next_index = smm->session_type_to_next[s->session_type];
537 next0 = next1 = next_index;
539 tp = session_get_transport_proto (s);
541 ctx->transport_vft = transport_protocol_get_vft (tp);
542 ctx->tc = session_tx_get_transport (ctx, peek_data);
543 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
544 ctx->snd_space = ctx->transport_vft->send_space (ctx->tc);
545 if (ctx->snd_space == 0 || ctx->snd_mss == 0)
547 vec_add1 (smm->pending_event_vector[thread_index], *e);
548 return SESSION_TX_NO_DATA;
551 /* Allow enqueuing of a new event */
552 svm_fifo_unset_event (s->server_tx_fifo);
554 /* Check how much we can pull. */
555 session_tx_set_dequeue_params (vm, ctx, VLIB_FRAME_SIZE - *n_tx_packets,
558 if (PREDICT_FALSE (!ctx->max_len_to_snd))
559 return SESSION_TX_NO_DATA;
561 n_bufs = vec_len (smm->tx_buffers[thread_index]);
562 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
565 * Make sure we have at least one full frame of buffers ready
567 if (n_bufs < n_bufs_needed)
569 session_output_try_get_buffers (vm, smm, thread_index, &n_bufs,
570 ctx->n_bufs_per_seg * VLIB_FRAME_SIZE);
571 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
573 vec_add1 (smm->pending_event_vector[thread_index], *e);
574 return SESSION_TX_NO_BUFFERS;
579 * Write until we fill up a frame
581 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
582 if (PREDICT_FALSE (ctx->n_segs_per_evt > n_left_to_next))
584 ctx->n_segs_per_evt = n_left_to_next;
585 ctx->max_len_to_snd = ctx->snd_mss * n_left_to_next;
587 ctx->left_to_snd = ctx->max_len_to_snd;
588 n_left = ctx->n_segs_per_evt;
592 vlib_buffer_t *b0, *b1;
595 pbi = smm->tx_buffers[thread_index][n_bufs - 3];
596 pb = vlib_get_buffer (vm, pbi);
597 vlib_prefetch_buffer_header (pb, STORE);
598 pbi = smm->tx_buffers[thread_index][n_bufs - 4];
599 pb = vlib_get_buffer (vm, pbi);
600 vlib_prefetch_buffer_header (pb, STORE);
602 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
603 to_next[1] = bi1 = smm->tx_buffers[thread_index][--n_bufs];
605 b0 = vlib_get_buffer (vm, bi0);
606 b1 = vlib_get_buffer (vm, bi1);
608 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
609 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
611 ctx->transport_vft->push_header (ctx->tc, b0);
612 ctx->transport_vft->push_header (ctx->tc, b1);
618 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
619 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
621 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
622 n_left_to_next, bi0, bi1, next0,
632 pbi = smm->tx_buffers[thread_index][n_bufs - 2];
633 pb = vlib_get_buffer (vm, pbi);
634 vlib_prefetch_buffer_header (pb, STORE);
637 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
638 b0 = vlib_get_buffer (vm, bi0);
639 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
641 /* Ask transport to push header after current_length and
642 * total_length_not_including_first_buffer are updated */
643 ctx->transport_vft->push_header (ctx->tc, b0);
649 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
651 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
652 n_left_to_next, bi0, next0);
655 if (PREDICT_FALSE (n_trace > 0))
656 session_tx_trace_frame (vm, node, next_index, to_next,
657 ctx->n_segs_per_evt, s, n_trace);
659 _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
660 *n_tx_packets += ctx->n_segs_per_evt;
661 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
663 /* If we couldn't dequeue all bytes mark as partially read */
664 ASSERT (ctx->left_to_snd == 0);
665 if (ctx->max_len_to_snd < ctx->max_dequeue)
666 if (svm_fifo_set_event (s->server_tx_fifo))
667 vec_add1 (smm->pending_event_vector[thread_index], *e);
669 if (!peek_data && ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
671 /* Fix dgram pre header */
672 if (ctx->max_len_to_snd < ctx->max_dequeue)
673 svm_fifo_overwrite_head (s->server_tx_fifo, (u8 *) & ctx->hdr,
674 sizeof (session_dgram_pre_hdr_t));
675 /* More data needs to be read */
676 else if (svm_fifo_max_dequeue (s->server_tx_fifo) > 0)
677 if (svm_fifo_set_event (s->server_tx_fifo))
678 vec_add1 (smm->pending_event_vector[thread_index], *e);
680 return SESSION_TX_OK;
684 session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
686 stream_session_t * s, int *n_tx_pkts)
688 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 1);
692 session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
694 stream_session_t * s, int *n_tx_pkts)
696 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 0);
700 session_tx_fifo_dequeue_internal (vlib_main_t * vm,
701 vlib_node_runtime_t * node,
703 stream_session_t * s, int *n_tx_pkts)
706 app = application_get (s->opaque);
707 svm_fifo_unset_event (s->server_tx_fifo);
708 return app->cb_fns.builtin_app_tx_callback (s);
711 always_inline stream_session_t *
712 session_event_get_session (session_event_t * e, u8 thread_index)
714 return session_get_if_valid (e->fifo->master_session_index, thread_index);
718 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
719 vlib_frame_t * frame)
721 session_manager_main_t *smm = vnet_get_session_manager_main ();
722 u32 thread_index = vm->thread_index, n_to_dequeue, n_events;
723 session_event_t *pending_events, *e;
724 session_event_t *fifo_events;
725 svm_msg_q_msg_t _msg, *msg = &_msg;
726 f64 now = vlib_time_now (vm);
727 int n_tx_packets = 0, i, rv;
732 SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, thread_index);
735 * Update transport time
737 transport_update_time (now, thread_index);
740 * Get vpp queue events that we can dequeue without blocking
742 mq = smm->vpp_event_queues[thread_index];
743 fifo_events = smm->free_event_vector[thread_index];
744 n_to_dequeue = svm_msg_q_size (mq);
745 pending_events = smm->pending_event_vector[thread_index];
747 if (!n_to_dequeue && !vec_len (pending_events)
748 && !vec_len (smm->pending_disconnects[thread_index]))
751 SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
754 * If we didn't manage to process previous events try going
755 * over them again without dequeuing new ones.
756 * XXX: Handle senders to sessions that can't keep up
758 if (0 && vec_len (pending_events) >= 100)
760 clib_warning ("too many fifo events unsolved");
764 /* See you in the next life, don't be late
765 * XXX: we may need priorities here */
766 if (svm_msg_q_try_lock (mq))
769 for (i = 0; i < n_to_dequeue; i++)
771 vec_add2 (fifo_events, e, 1);
772 svm_msg_q_sub_w_lock (mq, msg);
773 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), sizeof (*e));
774 svm_msg_q_free_msg (mq, msg);
777 svm_msg_q_unlock (mq);
779 vec_append (fifo_events, pending_events);
780 vec_append (fifo_events, smm->pending_disconnects[thread_index]);
782 _vec_len (pending_events) = 0;
783 smm->pending_event_vector[thread_index] = pending_events;
784 _vec_len (smm->pending_disconnects[thread_index]) = 0;
787 n_events = vec_len (fifo_events);
788 for (i = 0; i < n_events; i++)
790 stream_session_t *s; /* $$$ prefetch 1 ahead maybe */
795 switch (e->event_type)
797 case FIFO_EVENT_APP_TX:
798 /* Don't try to send more that one frame per dispatch cycle */
799 if (n_tx_packets == VLIB_FRAME_SIZE)
801 vec_add1 (smm->pending_event_vector[thread_index], *e);
805 s = session_event_get_session (e, thread_index);
806 if (PREDICT_FALSE (!s))
808 clib_warning ("It's dead, Jim!");
811 to_dequeue = svm_fifo_max_dequeue (s->server_tx_fifo);
813 /* Spray packets in per session type frames, since they go to
815 rv = (smm->session_tx_fns[s->session_type]) (vm, node, e, s,
817 if (PREDICT_TRUE (rv == SESSION_TX_OK))
819 /* Notify app there's tx space if not polling */
820 if (PREDICT_FALSE (to_dequeue == s->server_tx_fifo->nitems
821 && !svm_fifo_has_event (s->server_tx_fifo)))
822 session_dequeue_notify (s);
824 else if (PREDICT_FALSE (rv == SESSION_TX_NO_BUFFERS))
826 vlib_node_increment_counter (vm, node->node_index,
827 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
831 case FIFO_EVENT_DISCONNECT:
832 /* Make sure stream disconnects run after the pending list is
834 s = session_get_from_handle (e->session_handle);
838 vec_add1 (smm->pending_disconnects[thread_index], *e);
841 /* If tx queue is still not empty, wait */
842 if (svm_fifo_max_dequeue (s->server_tx_fifo))
844 vec_add1 (smm->pending_disconnects[thread_index], *e);
848 stream_session_disconnect_transport (s);
850 case FIFO_EVENT_BUILTIN_RX:
851 s = session_event_get_session (e, thread_index);
852 if (PREDICT_FALSE (!s))
854 svm_fifo_unset_event (s->server_rx_fifo);
855 app = application_get (s->app_index);
856 app->cb_fns.builtin_app_rx_callback (s);
860 (*fp) (e->rpc_args.arg);
862 case SESSION_CTRL_EVT_DISCONNECTED:
863 session_mq_disconnected_handler (e->data);
865 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
866 session_mq_accepted_reply_handler (e->data);
868 case SESSION_CTRL_EVT_CONNECTED_REPLY:
870 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
871 session_mq_disconnected_reply_handler (e->data);
873 case SESSION_CTRL_EVT_RESET_REPLY:
874 session_mq_reset_reply_handler (e->data);
877 clib_warning ("unhandled event type %d", e->event_type);
881 _vec_len (fifo_events) = 0;
882 smm->free_event_vector[thread_index] = fifo_events;
884 vlib_node_increment_counter (vm, session_queue_node.index,
885 SESSION_QUEUE_ERROR_TX, n_tx_packets);
887 SESSION_EVT_DBG (SESSION_EVT_DISPATCH_END, smm, thread_index);
893 VLIB_REGISTER_NODE (session_queue_node) =
895 .function = session_queue_node_fn,
896 .name = "session-queue",
897 .format_trace = format_session_queue_trace,
898 .type = VLIB_NODE_TYPE_INPUT,
899 .n_errors = ARRAY_LEN (session_queue_error_strings),
900 .error_strings = session_queue_error_strings,
901 .state = VLIB_NODE_STATE_DISABLED,
906 dump_thread_0_event_queue (void)
908 session_manager_main_t *smm = vnet_get_session_manager_main ();
909 vlib_main_t *vm = &vlib_global_main;
910 u32 my_thread_index = vm->thread_index;
911 session_event_t _e, *e = &_e;
912 svm_msg_q_ring_t *ring;
913 stream_session_t *s0;
914 svm_msg_q_msg_t *msg;
918 mq = smm->vpp_event_queues[my_thread_index];
921 for (i = 0; i < mq->q->cursize; i++)
923 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
924 ring = svm_msg_q_ring (mq, msg->ring_index);
925 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
927 switch (e->event_type)
929 case FIFO_EVENT_APP_TX:
930 s0 = session_event_get_session (e, my_thread_index);
931 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
934 case FIFO_EVENT_DISCONNECT:
935 s0 = session_get_from_handle (e->session_handle);
936 fformat (stdout, "[%04d] disconnect session %d\n", i,
940 case FIFO_EVENT_BUILTIN_RX:
941 s0 = session_event_get_session (e, my_thread_index);
942 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
946 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
947 i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
951 fformat (stdout, "[%04d] unhandled event type %d\n",
958 if (index == mq->q->maxsize)
964 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
967 switch (e->event_type)
969 case FIFO_EVENT_APP_RX:
970 case FIFO_EVENT_APP_TX:
971 case FIFO_EVENT_BUILTIN_RX:
975 case FIFO_EVENT_DISCONNECT:
978 s = session_get_from_handle (e->session_handle);
981 clib_warning ("session has event but doesn't exist!");
984 if (s->server_rx_fifo == f || s->server_tx_fifo == f)
994 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
996 session_manager_main_t *smm = vnet_get_session_manager_main ();
998 session_event_t *pending_event_vector, *evt;
999 int i, index, found = 0;
1000 svm_msg_q_msg_t *msg;
1001 svm_msg_q_ring_t *ring;
1005 thread_index = f->master_thread_index;
1009 mq = smm->vpp_event_queues[thread_index];
1010 index = mq->q->head;
1011 for (i = 0; i < mq->q->cursize; i++)
1013 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1014 ring = svm_msg_q_ring (mq, msg->ring_index);
1015 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1016 found = session_node_cmp_event (e, f);
1019 if (++index == mq->q->maxsize)
1023 * Search pending events vector
1025 pending_event_vector = smm->pending_event_vector[thread_index];
1026 vec_foreach (evt, pending_event_vector)
1028 found = session_node_cmp_event (evt, f);
1031 clib_memcpy (e, evt, sizeof (*evt));
1038 static clib_error_t *
1039 session_queue_exit (vlib_main_t * vm)
1041 if (vec_len (vlib_mains) < 2)
1045 * Shut off (especially) worker-thread session nodes.
1046 * Otherwise, vpp can crash as the main thread unmaps the
1049 vlib_worker_thread_barrier_sync (vm);
1050 session_node_enable_disable (0 /* is_enable */ );
1051 vlib_worker_thread_barrier_release (vm);
1055 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1058 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1061 f64 now, timeout = 1.0;
1062 uword *event_data = 0;
1067 vlib_process_wait_for_event_or_clock (vm, timeout);
1068 now = vlib_time_now (vm);
1069 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1073 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1074 /* Flush the frames by updating all transports times */
1075 transport_update_time (now, 0);
1077 case SESSION_Q_PROCESS_STOP:
1081 /* Timed out. Update time for all transports to trigger all
1082 * outstanding retransmits. */
1083 transport_update_time (now, 0);
1086 vec_reset_length (event_data);
1092 VLIB_REGISTER_NODE (session_queue_process_node) =
1094 .function = session_queue_process,
1095 .type = VLIB_NODE_TYPE_PROCESS,
1096 .name = "session-queue-process",
1097 .state = VLIB_NODE_STATE_DISABLED,
1103 * fd.io coding-style-patch-verification: ON
1106 * eval: (c-set-style "gnu")