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;
71 if (!svm_fifo_is_empty (s->server_rx_fifo))
74 app = application_get (s->app_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;
86 u32 index, thread_index;
88 mp = (session_reset_reply_msg_t *) data;
89 app = application_lookup (mp->client_index);
93 session_parse_handle (mp->handle, &index, &thread_index);
94 s = session_get_if_valid (index, thread_index);
95 if (s == 0 || app->index != s->app_index)
97 clib_warning ("Invalid session!");
101 /* Client objected to resetting the session, log and continue */
104 clib_warning ("client retval %d", mp->retval);
108 /* This comes as a response to a reset, transport only waiting for
109 * confirmation to remove connection state, no need to disconnect */
110 stream_session_cleanup (s);
114 session_mq_disconnected_handler (void *data)
116 session_disconnected_reply_msg_t *rmp;
117 vnet_disconnect_args_t _a, *a = &_a;
118 svm_msg_q_msg_t _msg, *msg = &_msg;
119 session_disconnected_msg_t *mp;
120 session_event_t *evt;
125 mp = (session_disconnected_msg_t *) data;
126 app = application_lookup (mp->client_index);
127 s = session_get_from_handle_if_valid (mp->handle);
128 if (!(app && s && s->app_index == app->index))
130 clib_warning ("could not disconnect session: %llu app: %u", mp->handle,
135 a->handle = mp->handle;
136 a->app_index = app->index;
137 rv = vnet_disconnect_session (a);
139 svm_msg_q_lock_and_alloc_msg_w_ring (app->event_queue,
140 SESSION_MQ_CTRL_EVT_RING,
142 svm_msg_q_unlock (app->event_queue);
143 evt = svm_msg_q_msg_data (app->event_queue, msg);
144 memset (evt, 0, sizeof (*evt));
145 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED;
146 rmp = (session_disconnected_reply_msg_t *) evt->data;
147 rmp->handle = mp->handle;
148 rmp->context = mp->context;
150 svm_msg_q_add (app->event_queue, msg, SVM_Q_WAIT);
154 session_mq_disconnected_reply_handler (void *data)
156 session_disconnected_reply_msg_t *mp;
157 vnet_disconnect_args_t _a, *a = &_a;
160 mp = (session_disconnected_reply_msg_t *) data;
162 /* Client objected to disconnecting the session, log and continue */
165 clib_warning ("client retval %d", mp->retval);
169 /* Disconnect has been confirmed. Confirm close to transport */
170 app = application_lookup (mp->context);
173 a->handle = mp->handle;
174 a->app_index = app->index;
175 vnet_disconnect_session (a);
179 vlib_node_registration_t session_queue_node;
184 u32 server_thread_index;
185 } session_queue_trace_t;
187 /* packet trace format function */
189 format_session_queue_trace (u8 * s, va_list * args)
191 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
192 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
193 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
195 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
196 t->session_index, t->server_thread_index);
200 #define foreach_session_queue_error \
201 _(TX, "Packets transmitted") \
202 _(TIMER, "Timer events") \
203 _(NO_BUFFER, "Out of buffers")
207 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
208 foreach_session_queue_error
210 SESSION_QUEUE_N_ERROR,
211 } session_queue_error_t;
213 static char *session_queue_error_strings[] = {
214 #define _(sym,string) string,
215 foreach_session_queue_error
221 SESSION_TX_NO_BUFFERS = -2,
227 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
228 u32 next_index, u32 * to_next, u16 n_segs,
229 stream_session_t * s, u32 n_trace)
231 session_queue_trace_t *t;
235 for (i = 0; i < clib_min (n_trace, n_segs); i++)
237 b = vlib_get_buffer (vm, to_next[i - n_segs]);
238 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
239 t = vlib_add_trace (vm, node, b, sizeof (*t));
240 t->session_index = s->session_index;
241 t->server_thread_index = s->thread_index;
243 vlib_set_trace_count (vm, node, n_trace - i);
247 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
248 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
250 session_manager_main_t *smm = &session_manager_main;
251 vlib_buffer_t *chain_b, *prev_b;
252 u32 chain_bi0, to_deq, left_from_seg;
253 u16 len_to_deq, n_bytes_read;
256 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
257 b->total_length_not_including_first_buffer = 0;
260 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
262 to_deq = left_from_seg;
263 for (j = 1; j < ctx->n_bufs_per_seg; j++)
266 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
269 chain_bi0 = smm->tx_buffers[ctx->s->thread_index][*n_bufs];
270 _vec_len (smm->tx_buffers[ctx->s->thread_index]) = *n_bufs;
272 chain_b = vlib_get_buffer (vm, chain_bi0);
273 chain_b->current_data = 0;
274 data = vlib_buffer_get_current (chain_b);
277 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo,
278 ctx->tx_offset, len_to_deq, data);
279 ctx->tx_offset += n_bytes_read;
283 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
285 svm_fifo_t *f = ctx->s->server_tx_fifo;
286 session_dgram_hdr_t *hdr = &ctx->hdr;
288 deq_now = clib_min (hdr->data_length - hdr->data_offset,
290 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
292 ASSERT (n_bytes_read > 0);
294 hdr->data_offset += n_bytes_read;
295 if (hdr->data_offset == hdr->data_length)
296 svm_fifo_dequeue_drop (f, hdr->data_length);
299 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
302 ASSERT (n_bytes_read == len_to_deq);
303 chain_b->current_length = n_bytes_read;
304 b->total_length_not_including_first_buffer += chain_b->current_length;
306 /* update previous buffer */
307 prev_b->next_buffer = chain_bi0;
308 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
310 /* update current buffer */
311 chain_b->next_buffer = 0;
313 to_deq -= n_bytes_read;
318 && b->total_length_not_including_first_buffer == left_from_seg);
319 ctx->left_to_snd -= left_from_seg;
323 session_output_try_get_buffers (vlib_main_t * vm,
324 session_manager_main_t * smm,
325 u32 thread_index, u16 * n_bufs, u32 wanted)
328 vec_validate_aligned (smm->tx_buffers[thread_index], wanted - 1,
329 CLIB_CACHE_LINE_BYTES);
330 n_alloc = vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][*n_bufs],
333 _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
338 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
339 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
346 * Start with the first buffer in chain
349 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
352 data0 = vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
353 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
357 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo, ctx->tx_offset,
359 ASSERT (n_bytes_read > 0);
360 /* Keep track of progress locally, transport is also supposed to
361 * increment it independently when pushing the header */
362 ctx->tx_offset += n_bytes_read;
366 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
368 session_dgram_hdr_t *hdr = &ctx->hdr;
369 svm_fifo_t *f = ctx->s->server_tx_fifo;
373 ASSERT (hdr->data_length > hdr->data_offset);
374 deq_now = clib_min (hdr->data_length - hdr->data_offset,
376 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
377 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
378 ASSERT (n_bytes_read > 0);
380 if (ctx->s->session_state == SESSION_STATE_LISTENING)
382 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
383 ctx->tc->rmt_port = hdr->rmt_port;
385 hdr->data_offset += n_bytes_read;
386 if (hdr->data_offset == hdr->data_length)
388 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
389 svm_fifo_dequeue_drop (f, offset);
394 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
396 ASSERT (n_bytes_read > 0);
399 b->current_length = n_bytes_read;
400 ctx->left_to_snd -= n_bytes_read;
403 * Fill in the remaining buffers in the chain, if any
405 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
406 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
409 SESSION_EVT_DBG(SESSION_EVT_DEQ, ctx->s, ({
410 ed->data[0] = FIFO_EVENT_APP_TX;
411 ed->data[1] = ctx->max_dequeue;
412 ed->data[2] = len_to_deq;
413 ed->data[3] = ctx->left_to_snd;
419 session_tx_not_ready (stream_session_t * s, u8 peek_data)
423 /* Can retransmit for closed sessions but can't send new data if
424 * session is not ready or closed */
425 if (s->session_state < SESSION_STATE_READY)
427 if (s->session_state == SESSION_STATE_CLOSED)
433 always_inline transport_connection_t *
434 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
438 return ctx->transport_vft->get_connection (ctx->s->connection_index,
439 ctx->s->thread_index);
443 if (ctx->s->session_state == SESSION_STATE_LISTENING)
444 return ctx->transport_vft->get_listener (ctx->s->connection_index);
447 return ctx->transport_vft->get_connection (ctx->s->connection_index,
448 ctx->s->thread_index);
454 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
455 u32 max_segs, u8 peek_data)
457 u32 n_bytes_per_buf, n_bytes_per_seg;
458 ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->server_tx_fifo);
461 /* Offset in rx fifo from where to peek data */
462 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
463 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
465 ctx->max_len_to_snd = 0;
468 ctx->max_dequeue -= ctx->tx_offset;
472 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
474 if (ctx->max_dequeue <= sizeof (ctx->hdr))
476 ctx->max_len_to_snd = 0;
479 svm_fifo_peek (ctx->s->server_tx_fifo, 0, sizeof (ctx->hdr),
481 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
482 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
485 ASSERT (ctx->max_dequeue > 0);
487 /* Ensure we're not writing more than transport window allows */
488 if (ctx->max_dequeue < ctx->snd_space)
490 /* Constrained by tx queue. Try to send only fully formed segments */
491 ctx->max_len_to_snd =
492 (ctx->max_dequeue > ctx->snd_mss) ?
493 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
498 /* Expectation is that snd_space0 is already a multiple of snd_mss */
499 ctx->max_len_to_snd = ctx->snd_space;
502 /* Check if we're tx constrained by the node */
503 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
504 if (ctx->n_segs_per_evt > max_segs)
506 ctx->n_segs_per_evt = max_segs;
507 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
510 n_bytes_per_buf = vlib_buffer_free_list_buffer_size (vm,
511 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
512 ASSERT (n_bytes_per_buf > MAX_HDRS_LEN);
513 n_bytes_per_seg = MAX_HDRS_LEN + ctx->snd_mss;
514 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
515 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
516 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
517 n_bytes_per_buf - MAX_HDRS_LEN);
521 session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
523 stream_session_t * s, int *n_tx_packets,
526 u32 next_index, next0, next1, *to_next, n_left_to_next;
527 u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
528 u32 thread_index = s->thread_index, n_left, pbi;
529 session_manager_main_t *smm = &session_manager_main;
530 session_tx_context_t *ctx = &smm->ctx[thread_index];
531 transport_proto_t tp;
535 if (PREDICT_FALSE ((rv = session_tx_not_ready (s, peek_data))))
538 vec_add1 (smm->pending_event_vector[thread_index], *e);
539 return SESSION_TX_NO_DATA;
542 next_index = smm->session_type_to_next[s->session_type];
543 next0 = next1 = next_index;
545 tp = session_get_transport_proto (s);
547 ctx->transport_vft = transport_protocol_get_vft (tp);
548 ctx->tc = session_tx_get_transport (ctx, peek_data);
549 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
550 ctx->snd_space = ctx->transport_vft->send_space (ctx->tc);
551 if (ctx->snd_space == 0 || ctx->snd_mss == 0)
553 vec_add1 (smm->pending_event_vector[thread_index], *e);
554 return SESSION_TX_NO_DATA;
557 /* Allow enqueuing of a new event */
558 svm_fifo_unset_event (s->server_tx_fifo);
560 /* Check how much we can pull. */
561 session_tx_set_dequeue_params (vm, ctx, VLIB_FRAME_SIZE - *n_tx_packets,
564 if (PREDICT_FALSE (!ctx->max_len_to_snd))
565 return SESSION_TX_NO_DATA;
567 n_bufs = vec_len (smm->tx_buffers[thread_index]);
568 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
571 * Make sure we have at least one full frame of buffers ready
573 if (n_bufs < n_bufs_needed)
575 session_output_try_get_buffers (vm, smm, thread_index, &n_bufs,
576 ctx->n_bufs_per_seg * VLIB_FRAME_SIZE);
577 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
579 vec_add1 (smm->pending_event_vector[thread_index], *e);
580 return SESSION_TX_NO_BUFFERS;
585 * Write until we fill up a frame
587 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
588 if (PREDICT_FALSE (ctx->n_segs_per_evt > n_left_to_next))
590 ctx->n_segs_per_evt = n_left_to_next;
591 ctx->max_len_to_snd = ctx->snd_mss * n_left_to_next;
593 ctx->left_to_snd = ctx->max_len_to_snd;
594 n_left = ctx->n_segs_per_evt;
598 vlib_buffer_t *b0, *b1;
601 pbi = smm->tx_buffers[thread_index][n_bufs - 3];
602 pb = vlib_get_buffer (vm, pbi);
603 vlib_prefetch_buffer_header (pb, STORE);
604 pbi = smm->tx_buffers[thread_index][n_bufs - 4];
605 pb = vlib_get_buffer (vm, pbi);
606 vlib_prefetch_buffer_header (pb, STORE);
608 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
609 to_next[1] = bi1 = smm->tx_buffers[thread_index][--n_bufs];
611 b0 = vlib_get_buffer (vm, bi0);
612 b1 = vlib_get_buffer (vm, bi1);
614 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
615 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
617 ctx->transport_vft->push_header (ctx->tc, b0);
618 ctx->transport_vft->push_header (ctx->tc, b1);
624 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
625 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
627 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
628 n_left_to_next, bi0, bi1, next0,
638 pbi = smm->tx_buffers[thread_index][n_bufs - 2];
639 pb = vlib_get_buffer (vm, pbi);
640 vlib_prefetch_buffer_header (pb, STORE);
643 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
644 b0 = vlib_get_buffer (vm, bi0);
645 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
647 /* Ask transport to push header after current_length and
648 * total_length_not_including_first_buffer are updated */
649 ctx->transport_vft->push_header (ctx->tc, b0);
655 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
657 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
658 n_left_to_next, bi0, next0);
661 if (PREDICT_FALSE (n_trace > 0))
662 session_tx_trace_frame (vm, node, next_index, to_next,
663 ctx->n_segs_per_evt, s, n_trace);
665 _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
666 *n_tx_packets += ctx->n_segs_per_evt;
667 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
669 /* If we couldn't dequeue all bytes mark as partially read */
670 ASSERT (ctx->left_to_snd == 0);
671 if (ctx->max_len_to_snd < ctx->max_dequeue)
672 if (svm_fifo_set_event (s->server_tx_fifo))
673 vec_add1 (smm->pending_event_vector[thread_index], *e);
675 if (!peek_data && ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
677 /* Fix dgram pre header */
678 if (ctx->max_len_to_snd < ctx->max_dequeue)
679 svm_fifo_overwrite_head (s->server_tx_fifo, (u8 *) & ctx->hdr,
680 sizeof (session_dgram_pre_hdr_t));
681 /* More data needs to be read */
682 else if (svm_fifo_max_dequeue (s->server_tx_fifo) > 0)
683 if (svm_fifo_set_event (s->server_tx_fifo))
684 vec_add1 (smm->pending_event_vector[thread_index], *e);
686 return SESSION_TX_OK;
690 session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
692 stream_session_t * s, int *n_tx_pkts)
694 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 1);
698 session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
700 stream_session_t * s, int *n_tx_pkts)
702 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 0);
706 session_tx_fifo_dequeue_internal (vlib_main_t * vm,
707 vlib_node_runtime_t * node,
709 stream_session_t * s, int *n_tx_pkts)
712 app = application_get (s->opaque);
713 svm_fifo_unset_event (s->server_tx_fifo);
714 return app->cb_fns.builtin_app_tx_callback (s);
717 always_inline stream_session_t *
718 session_event_get_session (session_event_t * e, u8 thread_index)
720 return session_get_if_valid (e->fifo->master_session_index, thread_index);
724 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
725 vlib_frame_t * frame)
727 session_manager_main_t *smm = vnet_get_session_manager_main ();
728 u32 thread_index = vm->thread_index, n_to_dequeue, n_events;
729 session_event_t *pending_events, *e;
730 session_event_t *fifo_events;
731 svm_msg_q_msg_t _msg, *msg = &_msg;
732 f64 now = vlib_time_now (vm);
733 int n_tx_packets = 0, i, rv;
738 SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, thread_index);
741 * Update transport time
743 transport_update_time (now, thread_index);
746 * Get vpp queue events that we can dequeue without blocking
748 mq = smm->vpp_event_queues[thread_index];
749 fifo_events = smm->free_event_vector[thread_index];
750 n_to_dequeue = svm_msg_q_size (mq);
751 pending_events = smm->pending_event_vector[thread_index];
753 if (!n_to_dequeue && !vec_len (pending_events)
754 && !vec_len (smm->pending_disconnects[thread_index]))
757 SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
760 * If we didn't manage to process previous events try going
761 * over them again without dequeuing new ones.
762 * XXX: Handle senders to sessions that can't keep up
764 if (0 && vec_len (pending_events) >= 100)
766 clib_warning ("too many fifo events unsolved");
770 /* See you in the next life, don't be late
771 * XXX: we may need priorities here */
772 if (svm_msg_q_try_lock (mq))
775 for (i = 0; i < n_to_dequeue; i++)
777 vec_add2 (fifo_events, e, 1);
778 svm_msg_q_sub_w_lock (mq, msg);
779 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), sizeof (*e));
780 svm_msg_q_free_msg (mq, msg);
783 svm_msg_q_unlock (mq);
785 vec_append (fifo_events, pending_events);
786 vec_append (fifo_events, smm->pending_disconnects[thread_index]);
788 _vec_len (pending_events) = 0;
789 smm->pending_event_vector[thread_index] = pending_events;
790 _vec_len (smm->pending_disconnects[thread_index]) = 0;
793 n_events = vec_len (fifo_events);
794 for (i = 0; i < n_events; i++)
796 stream_session_t *s; /* $$$ prefetch 1 ahead maybe */
801 switch (e->event_type)
803 case FIFO_EVENT_APP_TX:
804 /* Don't try to send more that one frame per dispatch cycle */
805 if (n_tx_packets == VLIB_FRAME_SIZE)
807 vec_add1 (smm->pending_event_vector[thread_index], *e);
811 s = session_event_get_session (e, thread_index);
812 if (PREDICT_FALSE (!s))
814 clib_warning ("It's dead, Jim!");
817 is_full = svm_fifo_is_full (s->server_tx_fifo);
819 /* Spray packets in per session type frames, since they go to
821 rv = (smm->session_tx_fns[s->session_type]) (vm, node, e, s,
823 if (PREDICT_TRUE (rv == SESSION_TX_OK))
825 /* Notify app there's tx space if not polling */
826 if (PREDICT_FALSE (is_full
827 && !svm_fifo_has_event (s->server_tx_fifo)))
828 session_dequeue_notify (s);
830 else if (PREDICT_FALSE (rv == SESSION_TX_NO_BUFFERS))
832 vlib_node_increment_counter (vm, node->node_index,
833 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
837 case FIFO_EVENT_DISCONNECT:
838 /* Make sure stream disconnects run after the pending list is
840 s = session_get_from_handle (e->session_handle);
844 vec_add1 (smm->pending_disconnects[thread_index], *e);
847 /* If tx queue is still not empty, wait */
848 if (svm_fifo_max_dequeue (s->server_tx_fifo))
850 vec_add1 (smm->pending_disconnects[thread_index], *e);
854 stream_session_disconnect_transport (s);
856 case FIFO_EVENT_BUILTIN_RX:
857 s = session_event_get_session (e, thread_index);
858 if (PREDICT_FALSE (!s))
860 svm_fifo_unset_event (s->server_rx_fifo);
861 app = application_get (s->app_index);
862 app->cb_fns.builtin_app_rx_callback (s);
866 (*fp) (e->rpc_args.arg);
868 case SESSION_CTRL_EVT_DISCONNECTED:
869 session_mq_disconnected_handler (e->data);
871 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
872 session_mq_accepted_reply_handler (e->data);
874 case SESSION_CTRL_EVT_CONNECTED_REPLY:
876 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
877 session_mq_disconnected_reply_handler (e->data);
879 case SESSION_CTRL_EVT_RESET_REPLY:
880 session_mq_reset_reply_handler (e->data);
883 clib_warning ("unhandled event type %d", e->event_type);
887 _vec_len (fifo_events) = 0;
888 smm->free_event_vector[thread_index] = fifo_events;
890 vlib_node_increment_counter (vm, session_queue_node.index,
891 SESSION_QUEUE_ERROR_TX, n_tx_packets);
893 SESSION_EVT_DBG (SESSION_EVT_DISPATCH_END, smm, thread_index);
899 VLIB_REGISTER_NODE (session_queue_node) =
901 .function = session_queue_node_fn,
902 .name = "session-queue",
903 .format_trace = format_session_queue_trace,
904 .type = VLIB_NODE_TYPE_INPUT,
905 .n_errors = ARRAY_LEN (session_queue_error_strings),
906 .error_strings = session_queue_error_strings,
907 .state = VLIB_NODE_STATE_DISABLED,
912 dump_thread_0_event_queue (void)
914 session_manager_main_t *smm = vnet_get_session_manager_main ();
915 vlib_main_t *vm = &vlib_global_main;
916 u32 my_thread_index = vm->thread_index;
917 session_event_t _e, *e = &_e;
918 svm_msg_q_ring_t *ring;
919 stream_session_t *s0;
920 svm_msg_q_msg_t *msg;
924 mq = smm->vpp_event_queues[my_thread_index];
927 for (i = 0; i < mq->q->cursize; i++)
929 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
930 ring = svm_msg_q_ring (mq, msg->ring_index);
931 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
933 switch (e->event_type)
935 case FIFO_EVENT_APP_TX:
936 s0 = session_event_get_session (e, my_thread_index);
937 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
940 case FIFO_EVENT_DISCONNECT:
941 s0 = session_get_from_handle (e->session_handle);
942 fformat (stdout, "[%04d] disconnect session %d\n", i,
946 case FIFO_EVENT_BUILTIN_RX:
947 s0 = session_event_get_session (e, my_thread_index);
948 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
952 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
953 i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
957 fformat (stdout, "[%04d] unhandled event type %d\n",
964 if (index == mq->q->maxsize)
970 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
973 switch (e->event_type)
975 case FIFO_EVENT_APP_RX:
976 case FIFO_EVENT_APP_TX:
977 case FIFO_EVENT_BUILTIN_RX:
981 case FIFO_EVENT_DISCONNECT:
984 s = session_get_from_handle (e->session_handle);
987 clib_warning ("session has event but doesn't exist!");
990 if (s->server_rx_fifo == f || s->server_tx_fifo == f)
1000 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1002 session_manager_main_t *smm = vnet_get_session_manager_main ();
1004 session_event_t *pending_event_vector, *evt;
1005 int i, index, found = 0;
1006 svm_msg_q_msg_t *msg;
1007 svm_msg_q_ring_t *ring;
1011 thread_index = f->master_thread_index;
1015 mq = smm->vpp_event_queues[thread_index];
1016 index = mq->q->head;
1017 for (i = 0; i < mq->q->cursize; i++)
1019 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1020 ring = svm_msg_q_ring (mq, msg->ring_index);
1021 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1022 found = session_node_cmp_event (e, f);
1025 if (++index == mq->q->maxsize)
1029 * Search pending events vector
1031 pending_event_vector = smm->pending_event_vector[thread_index];
1032 vec_foreach (evt, pending_event_vector)
1034 found = session_node_cmp_event (evt, f);
1037 clib_memcpy (e, evt, sizeof (*evt));
1044 static clib_error_t *
1045 session_queue_exit (vlib_main_t * vm)
1047 if (vec_len (vlib_mains) < 2)
1051 * Shut off (especially) worker-thread session nodes.
1052 * Otherwise, vpp can crash as the main thread unmaps the
1055 vlib_worker_thread_barrier_sync (vm);
1056 session_node_enable_disable (0 /* is_enable */ );
1057 vlib_worker_thread_barrier_release (vm);
1061 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1064 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1067 f64 now, timeout = 1.0;
1068 uword *event_data = 0;
1073 vlib_process_wait_for_event_or_clock (vm, timeout);
1074 now = vlib_time_now (vm);
1075 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1079 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1080 /* Flush the frames by updating all transports times */
1081 transport_update_time (now, 0);
1083 case SESSION_Q_PROCESS_STOP:
1087 /* Timed out. Update time for all transports to trigger all
1088 * outstanding retransmits. */
1089 transport_update_time (now, 0);
1092 vec_reset_length (event_data);
1098 VLIB_REGISTER_NODE (session_queue_process_node) =
1100 .function = session_queue_process,
1101 .type = VLIB_NODE_TYPE_PROCESS,
1102 .name = "session-queue-process",
1103 .state = VLIB_NODE_STATE_DISABLED,
1109 * fd.io coding-style-patch-verification: ON
1112 * eval: (c-set-style "gnu")