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;
32 app_worker_t *app_wrk;
36 /* Server isn't interested, kill the session */
39 a->app_index = mp->context;
40 a->handle = mp->handle;
41 vnet_disconnect_session (a);
45 if (session_handle_is_local (mp->handle))
47 ls = application_get_local_session_from_handle (mp->handle);
50 clib_warning ("unknown local handle 0x%lx", mp->handle);
53 app_wrk = app_worker_get (ls->app_wrk_index);
54 if (app_wrk->app_index != mp->context)
56 clib_warning ("server %u doesn't own local handle 0x%lx",
57 mp->context, mp->handle);
60 if (application_local_session_connect_notify (ls))
62 ls->session_state = SESSION_STATE_READY;
66 s = session_get_from_handle_if_valid (mp->handle);
67 /* Closed while waiting for app to reply */
68 if (!s || s->session_state > SESSION_STATE_READY)
70 app_wrk = app_worker_get (s->app_wrk_index);
71 if (app_wrk->app_index != mp->context)
73 clib_warning ("app doesn't own session");
76 s->session_state = SESSION_STATE_READY;
77 if (!svm_fifo_is_empty (s->server_rx_fifo))
78 app_worker_lock_and_send_event (app_wrk, s, FIFO_EVENT_APP_RX);
83 session_mq_reset_reply_handler (void *data)
85 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
86 session_reset_reply_msg_t *mp;
87 app_worker_t *app_wrk;
90 u32 index, thread_index;
92 mp = (session_reset_reply_msg_t *) data;
93 app = application_lookup (mp->context);
97 session_parse_handle (mp->handle, &index, &thread_index);
98 s = session_get_if_valid (index, thread_index);
100 /* Session was already closed or already cleaned up */
101 if (!s || s->session_state != SESSION_STATE_TRANSPORT_CLOSING)
104 app_wrk = app_worker_get (s->app_wrk_index);
105 if (!app_wrk || app_wrk->app_index != app->app_index)
107 clib_warning ("App % does not own handle 0x%lx!", app->app_index,
112 /* Client objected to resetting the session, log and continue */
115 clib_warning ("client retval %d", mp->retval);
119 /* This comes as a response to a reset, transport only waiting for
120 * confirmation to remove connection state, no need to disconnect */
121 a->handle = mp->handle;
122 a->app_index = app->app_index;
123 vnet_disconnect_session (a);
127 session_mq_disconnected_handler (void *data)
129 session_disconnected_reply_msg_t *rmp;
130 vnet_disconnect_args_t _a, *a = &_a;
131 svm_msg_q_msg_t _msg, *msg = &_msg;
132 session_disconnected_msg_t *mp;
133 app_worker_t *app_wrk;
134 session_event_t *evt;
139 mp = (session_disconnected_msg_t *) data;
140 if (!(s = session_get_from_handle_if_valid (mp->handle)))
142 clib_warning ("could not disconnect handle %llu", mp->handle);
145 app_wrk = app_worker_get (s->app_wrk_index);
146 app = application_lookup (mp->client_index);
147 if (!(app_wrk && app && app->app_index == app_wrk->app_index))
149 clib_warning ("could not disconnect session: %llu app: %u",
150 mp->handle, mp->client_index);
154 a->handle = mp->handle;
155 a->app_index = app_wrk->wrk_index;
156 rv = vnet_disconnect_session (a);
158 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
159 SESSION_MQ_CTRL_EVT_RING,
161 svm_msg_q_unlock (app_wrk->event_queue);
162 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
163 clib_memset (evt, 0, sizeof (*evt));
164 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED;
165 rmp = (session_disconnected_reply_msg_t *) evt->data;
166 rmp->handle = mp->handle;
167 rmp->context = mp->context;
169 svm_msg_q_add (app_wrk->event_queue, msg, SVM_Q_WAIT);
173 session_mq_disconnected_reply_handler (void *data)
175 session_disconnected_reply_msg_t *mp;
176 vnet_disconnect_args_t _a, *a = &_a;
179 mp = (session_disconnected_reply_msg_t *) data;
181 /* Client objected to disconnecting the session, log and continue */
184 clib_warning ("client retval %d", mp->retval);
188 /* Disconnect has been confirmed. Confirm close to transport */
189 app = application_lookup (mp->context);
192 a->handle = mp->handle;
193 a->app_index = app->app_index;
194 vnet_disconnect_session (a);
198 vlib_node_registration_t session_queue_node;
203 u32 server_thread_index;
204 } session_queue_trace_t;
206 /* packet trace format function */
208 format_session_queue_trace (u8 * s, va_list * args)
210 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
211 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
212 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
214 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
215 t->session_index, t->server_thread_index);
219 #define foreach_session_queue_error \
220 _(TX, "Packets transmitted") \
221 _(TIMER, "Timer events") \
222 _(NO_BUFFER, "Out of buffers")
226 #define _(sym,str) SESSION_QUEUE_ERROR_##sym,
227 foreach_session_queue_error
229 SESSION_QUEUE_N_ERROR,
230 } session_queue_error_t;
232 static char *session_queue_error_strings[] = {
233 #define _(sym,string) string,
234 foreach_session_queue_error
240 SESSION_TX_NO_BUFFERS = -2,
246 session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
247 u32 next_index, u32 * to_next, u16 n_segs,
248 stream_session_t * s, u32 n_trace)
250 session_queue_trace_t *t;
254 for (i = 0; i < clib_min (n_trace, n_segs); i++)
256 b = vlib_get_buffer (vm, to_next[i - n_segs]);
257 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
258 t = vlib_add_trace (vm, node, b, sizeof (*t));
259 t->session_index = s->session_index;
260 t->server_thread_index = s->thread_index;
262 vlib_set_trace_count (vm, node, n_trace - i);
266 session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
267 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
269 vlib_buffer_t *chain_b, *prev_b;
270 u32 chain_bi0, to_deq, left_from_seg;
271 session_manager_worker_t *wrk;
272 u16 len_to_deq, n_bytes_read;
275 wrk = session_manager_get_worker (ctx->s->thread_index);
276 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
277 b->total_length_not_including_first_buffer = 0;
280 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
282 to_deq = left_from_seg;
283 for (j = 1; j < ctx->n_bufs_per_seg; j++)
286 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
289 chain_bi0 = wrk->tx_buffers[*n_bufs];
290 _vec_len (wrk->tx_buffers) = *n_bufs;
292 chain_b = vlib_get_buffer (vm, chain_bi0);
293 chain_b->current_data = 0;
294 data = vlib_buffer_get_current (chain_b);
297 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo,
298 ctx->tx_offset, len_to_deq, data);
299 ctx->tx_offset += n_bytes_read;
303 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
305 svm_fifo_t *f = ctx->s->server_tx_fifo;
306 session_dgram_hdr_t *hdr = &ctx->hdr;
308 deq_now = clib_min (hdr->data_length - hdr->data_offset,
310 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
312 ASSERT (n_bytes_read > 0);
314 hdr->data_offset += n_bytes_read;
315 if (hdr->data_offset == hdr->data_length)
317 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
318 svm_fifo_dequeue_drop (f, offset);
322 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
325 ASSERT (n_bytes_read == len_to_deq);
326 chain_b->current_length = n_bytes_read;
327 b->total_length_not_including_first_buffer += chain_b->current_length;
329 /* update previous buffer */
330 prev_b->next_buffer = chain_bi0;
331 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
333 /* update current buffer */
334 chain_b->next_buffer = 0;
336 to_deq -= n_bytes_read;
341 && b->total_length_not_including_first_buffer == left_from_seg);
342 ctx->left_to_snd -= left_from_seg;
346 session_output_try_get_buffers (vlib_main_t * vm,
347 session_manager_worker_t * wrk,
348 u32 thread_index, u16 * n_bufs, u32 wanted)
351 vec_validate_aligned (wrk->tx_buffers, wanted - 1, CLIB_CACHE_LINE_BYTES);
352 n_alloc = vlib_buffer_alloc (vm, &wrk->tx_buffers[*n_bufs],
355 _vec_len (wrk->tx_buffers) = *n_bufs;
360 session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
361 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
368 * Start with the first buffer in chain
371 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
374 data0 = vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
375 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
379 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo, ctx->tx_offset,
381 ASSERT (n_bytes_read > 0);
382 /* Keep track of progress locally, transport is also supposed to
383 * increment it independently when pushing the header */
384 ctx->tx_offset += n_bytes_read;
388 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
390 session_dgram_hdr_t *hdr = &ctx->hdr;
391 svm_fifo_t *f = ctx->s->server_tx_fifo;
395 ASSERT (hdr->data_length > hdr->data_offset);
396 deq_now = clib_min (hdr->data_length - hdr->data_offset,
398 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
399 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
400 ASSERT (n_bytes_read > 0);
402 if (ctx->s->session_state == SESSION_STATE_LISTENING)
404 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
405 ctx->tc->rmt_port = hdr->rmt_port;
407 hdr->data_offset += n_bytes_read;
408 if (hdr->data_offset == hdr->data_length)
410 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
411 svm_fifo_dequeue_drop (f, offset);
416 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
418 ASSERT (n_bytes_read > 0);
421 b->current_length = n_bytes_read;
422 ctx->left_to_snd -= n_bytes_read;
425 * Fill in the remaining buffers in the chain, if any
427 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
428 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
431 SESSION_EVT_DBG(SESSION_EVT_DEQ, ctx->s, ({
432 ed->data[0] = FIFO_EVENT_APP_TX;
433 ed->data[1] = ctx->max_dequeue;
434 ed->data[2] = len_to_deq;
435 ed->data[3] = ctx->left_to_snd;
441 session_tx_not_ready (stream_session_t * s, u8 peek_data)
445 /* Can retransmit for closed sessions but can't send new data if
446 * session is not ready or closed */
447 if (s->session_state < SESSION_STATE_READY)
449 if (s->session_state == SESSION_STATE_CLOSED)
455 always_inline transport_connection_t *
456 session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
460 return ctx->transport_vft->get_connection (ctx->s->connection_index,
461 ctx->s->thread_index);
465 if (ctx->s->session_state == SESSION_STATE_LISTENING)
466 return ctx->transport_vft->get_listener (ctx->s->connection_index);
469 return ctx->transport_vft->get_connection (ctx->s->connection_index,
470 ctx->s->thread_index);
476 session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
477 u32 max_segs, u8 peek_data)
479 u32 n_bytes_per_buf, n_bytes_per_seg;
480 ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->server_tx_fifo);
483 /* Offset in rx fifo from where to peek data */
484 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
485 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
487 ctx->max_len_to_snd = 0;
490 ctx->max_dequeue -= ctx->tx_offset;
494 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
496 if (ctx->max_dequeue <= sizeof (ctx->hdr))
498 ctx->max_len_to_snd = 0;
501 svm_fifo_peek (ctx->s->server_tx_fifo, 0, sizeof (ctx->hdr),
503 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
504 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
507 ASSERT (ctx->max_dequeue > 0);
509 /* Ensure we're not writing more than transport window allows */
510 if (ctx->max_dequeue < ctx->snd_space)
512 /* Constrained by tx queue. Try to send only fully formed segments */
513 ctx->max_len_to_snd =
514 (ctx->max_dequeue > ctx->snd_mss) ?
515 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
520 /* Expectation is that snd_space0 is already a multiple of snd_mss */
521 ctx->max_len_to_snd = ctx->snd_space;
524 /* Check if we're tx constrained by the node */
525 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
526 if (ctx->n_segs_per_evt > max_segs)
528 ctx->n_segs_per_evt = max_segs;
529 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
532 n_bytes_per_buf = vlib_buffer_free_list_buffer_size (vm,
533 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
534 ASSERT (n_bytes_per_buf > MAX_HDRS_LEN);
535 n_bytes_per_seg = MAX_HDRS_LEN + ctx->snd_mss;
536 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
537 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
538 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
539 n_bytes_per_buf - MAX_HDRS_LEN);
543 session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
545 stream_session_t * s, int *n_tx_packets,
548 u32 next_index, next0, next1, *to_next, n_left_to_next;
549 u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
550 u32 thread_index = s->thread_index, n_left, pbi;
551 session_manager_main_t *smm = &session_manager_main;
552 session_manager_worker_t *wrk = &smm->wrk[thread_index];
553 session_tx_context_t *ctx = &wrk->ctx;
554 transport_proto_t tp;
558 if (PREDICT_FALSE ((rv = session_tx_not_ready (s, peek_data))))
561 vec_add1 (wrk->pending_event_vector, *e);
562 return SESSION_TX_NO_DATA;
565 next_index = smm->session_type_to_next[s->session_type];
566 next0 = next1 = next_index;
568 tp = session_get_transport_proto (s);
570 ctx->transport_vft = transport_protocol_get_vft (tp);
571 ctx->tc = session_tx_get_transport (ctx, peek_data);
572 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
574 if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
576 if (ctx->transport_vft->flush_data)
577 ctx->transport_vft->flush_data (ctx->tc);
580 ctx->snd_space = transport_connection_snd_space (ctx->tc,
582 clib_time.last_cpu_time,
584 if (ctx->snd_space == 0 || ctx->snd_mss == 0)
586 vec_add1 (wrk->pending_event_vector, *e);
587 return SESSION_TX_NO_DATA;
590 /* Allow enqueuing of a new event */
591 svm_fifo_unset_event (s->server_tx_fifo);
593 /* Check how much we can pull. */
594 session_tx_set_dequeue_params (vm, ctx, VLIB_FRAME_SIZE - *n_tx_packets,
597 if (PREDICT_FALSE (!ctx->max_len_to_snd))
598 return SESSION_TX_NO_DATA;
600 n_bufs = vec_len (wrk->tx_buffers);
601 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
604 * Make sure we have at least one full frame of buffers ready
606 if (n_bufs < n_bufs_needed)
608 session_output_try_get_buffers (vm, wrk, thread_index, &n_bufs,
609 ctx->n_bufs_per_seg * VLIB_FRAME_SIZE);
610 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
612 vec_add1 (wrk->pending_event_vector, *e);
613 return SESSION_TX_NO_BUFFERS;
618 * Write until we fill up a frame
620 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
621 if (PREDICT_FALSE (ctx->n_segs_per_evt > n_left_to_next))
623 ctx->n_segs_per_evt = n_left_to_next;
624 ctx->max_len_to_snd = ctx->snd_mss * n_left_to_next;
626 ctx->left_to_snd = ctx->max_len_to_snd;
627 n_left = ctx->n_segs_per_evt;
631 vlib_buffer_t *b0, *b1;
634 pbi = wrk->tx_buffers[n_bufs - 3];
635 pb = vlib_get_buffer (vm, pbi);
636 vlib_prefetch_buffer_header (pb, STORE);
637 pbi = wrk->tx_buffers[n_bufs - 4];
638 pb = vlib_get_buffer (vm, pbi);
639 vlib_prefetch_buffer_header (pb, STORE);
641 to_next[0] = bi0 = wrk->tx_buffers[--n_bufs];
642 to_next[1] = bi1 = wrk->tx_buffers[--n_bufs];
644 b0 = vlib_get_buffer (vm, bi0);
645 b1 = vlib_get_buffer (vm, bi1);
647 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
648 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
650 ctx->transport_vft->push_header (ctx->tc, b0);
651 ctx->transport_vft->push_header (ctx->tc, b1);
657 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
658 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
660 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
661 n_left_to_next, bi0, bi1, next0,
671 pbi = wrk->tx_buffers[n_bufs - 2];
672 pb = vlib_get_buffer (vm, pbi);
673 vlib_prefetch_buffer_header (pb, STORE);
676 to_next[0] = bi0 = wrk->tx_buffers[--n_bufs];
677 b0 = vlib_get_buffer (vm, bi0);
678 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
680 /* Ask transport to push header after current_length and
681 * total_length_not_including_first_buffer are updated */
682 ctx->transport_vft->push_header (ctx->tc, b0);
688 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
690 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
691 n_left_to_next, bi0, next0);
694 if (PREDICT_FALSE (n_trace > 0))
695 session_tx_trace_frame (vm, node, next_index, to_next,
696 ctx->n_segs_per_evt, s, n_trace);
698 _vec_len (wrk->tx_buffers) = n_bufs;
699 *n_tx_packets += ctx->n_segs_per_evt;
700 transport_connection_update_tx_stats (ctx->tc, ctx->max_len_to_snd);
701 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
703 /* If we couldn't dequeue all bytes mark as partially read */
704 ASSERT (ctx->left_to_snd == 0);
705 if (ctx->max_len_to_snd < ctx->max_dequeue)
706 if (svm_fifo_set_event (s->server_tx_fifo))
707 vec_add1 (wrk->pending_event_vector, *e);
709 if (!peek_data && ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
711 /* Fix dgram pre header */
712 if (ctx->max_len_to_snd < ctx->max_dequeue)
713 svm_fifo_overwrite_head (s->server_tx_fifo, (u8 *) & ctx->hdr,
714 sizeof (session_dgram_pre_hdr_t));
715 /* More data needs to be read */
716 else if (svm_fifo_max_dequeue (s->server_tx_fifo) > 0)
717 if (svm_fifo_set_event (s->server_tx_fifo))
718 vec_add1 (wrk->pending_event_vector, *e);
720 return SESSION_TX_OK;
724 session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
726 stream_session_t * s, int *n_tx_pkts)
728 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 1);
732 session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
734 stream_session_t * s, int *n_tx_pkts)
736 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 0);
740 session_tx_fifo_dequeue_internal (vlib_main_t * vm,
741 vlib_node_runtime_t * node,
743 stream_session_t * s, int *n_tx_pkts)
746 if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
748 app = application_get (s->t_app_index);
749 svm_fifo_unset_event (s->server_tx_fifo);
750 return app->cb_fns.builtin_app_tx_callback (s);
753 always_inline stream_session_t *
754 session_event_get_session (session_event_t * e, u8 thread_index)
756 return session_get_if_valid (e->fifo->master_session_index, thread_index);
760 session_update_dispatch_period (session_manager_worker_t * wrk, f64 now,
763 if (wrk->last_tx_packets)
765 f64 sample = now - wrk->last_vlib_time;
766 wrk->dispatch_period = (wrk->dispatch_period + sample) * 0.5;
768 wrk->last_vlib_time = now;
772 session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
773 vlib_frame_t * frame)
775 session_manager_main_t *smm = vnet_get_session_manager_main ();
776 u32 thread_index = vm->thread_index, n_to_dequeue, n_events;
777 session_manager_worker_t *wrk = &smm->wrk[thread_index];
778 session_event_t *e, *fifo_events;
779 svm_msg_q_msg_t _msg, *msg = &_msg;
780 f64 now = vlib_time_now (vm);
781 int n_tx_packets = 0, i, rv;
782 app_worker_t *app_wrk;
787 SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, thread_index);
790 * Update transport time
792 session_update_dispatch_period (wrk, now, thread_index);
793 transport_update_time (now, thread_index);
795 SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
797 /* Make sure postponed events are handled first */
798 fifo_events = wrk->free_event_vector;
799 vec_append (fifo_events, wrk->postponed_event_vector);
800 _vec_len (wrk->postponed_event_vector) = 0;
802 /* Try to dequeue what is available. Don't wait for lock.
803 * XXX: we may need priorities here */
804 mq = wrk->vpp_event_queue;
805 n_to_dequeue = svm_msg_q_size (mq);
806 if (n_to_dequeue && svm_msg_q_try_lock (mq) == 0)
808 for (i = 0; i < n_to_dequeue; i++)
810 vec_add2 (fifo_events, e, 1);
811 svm_msg_q_sub_w_lock (mq, msg);
812 /* Works because reply messages are smaller than a session evt.
813 * If we ever need to support bigger messages this needs to be
815 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), sizeof (*e));
816 svm_msg_q_free_msg (mq, msg);
818 svm_msg_q_unlock (mq);
821 vec_append (fifo_events, wrk->pending_event_vector);
822 vec_append (fifo_events, wrk->pending_disconnects);
824 _vec_len (wrk->pending_event_vector) = 0;
825 _vec_len (wrk->pending_disconnects) = 0;
827 n_events = vec_len (fifo_events);
828 if (PREDICT_FALSE (!n_events))
831 for (i = 0; i < n_events; i++)
833 stream_session_t *s; /* $$$ prefetch 1 ahead maybe */
838 switch (e->event_type)
840 case SESSION_IO_EVT_TX_FLUSH:
841 case FIFO_EVENT_APP_TX:
842 /* Don't try to send more that one frame per dispatch cycle */
843 if (n_tx_packets == VLIB_FRAME_SIZE)
845 vec_add1 (wrk->postponed_event_vector, *e);
849 s = session_event_get_session (e, thread_index);
850 if (PREDICT_FALSE (!s))
852 clib_warning ("session was freed!");
856 want_tx_evt = svm_fifo_want_tx_evt (s->server_tx_fifo);
857 /* Spray packets in per session type frames, since they go to
859 rv = (smm->session_tx_fns[s->session_type]) (vm, node, e, s,
861 if (PREDICT_TRUE (rv == SESSION_TX_OK))
863 if (PREDICT_FALSE (want_tx_evt))
865 svm_fifo_set_want_tx_evt (s->server_tx_fifo, 0);
866 session_dequeue_notify (s);
869 else if (PREDICT_FALSE (rv == SESSION_TX_NO_BUFFERS))
871 vlib_node_increment_counter (vm, node->node_index,
872 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
876 case FIFO_EVENT_DISCONNECT:
877 s = session_get_from_handle_if_valid (e->session_handle);
878 if (PREDICT_FALSE (!s))
881 /* Make sure session disconnects run after the pending list is
882 * drained, i.e., postpone if the first time. If not the first
883 * and the tx queue is still not empty, try to wait for some
886 || (e->postponed < 200
887 && svm_fifo_max_dequeue (s->server_tx_fifo)))
890 vec_add1 (wrk->pending_disconnects, *e);
894 stream_session_disconnect_transport (s);
896 case FIFO_EVENT_BUILTIN_RX:
897 s = session_event_get_session (e, thread_index);
898 if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
900 svm_fifo_unset_event (s->server_rx_fifo);
901 app_wrk = app_worker_get (s->app_wrk_index);
902 app = application_get (app_wrk->app_index);
903 app->cb_fns.builtin_app_rx_callback (s);
905 case FIFO_EVENT_BUILTIN_TX:
906 s = session_get_from_handle_if_valid (e->session_handle);
907 if (PREDICT_TRUE (s != 0))
908 session_tx_fifo_dequeue_internal (vm, node, e, s, &n_tx_packets);
912 (*fp) (e->rpc_args.arg);
914 case SESSION_CTRL_EVT_DISCONNECTED:
915 session_mq_disconnected_handler (e->data);
917 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
918 session_mq_accepted_reply_handler (e->data);
920 case SESSION_CTRL_EVT_CONNECTED_REPLY:
922 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
923 session_mq_disconnected_reply_handler (e->data);
925 case SESSION_CTRL_EVT_RESET_REPLY:
926 session_mq_reset_reply_handler (e->data);
929 clib_warning ("unhandled event type %d", e->event_type);
933 _vec_len (fifo_events) = 0;
934 wrk->free_event_vector = fifo_events;
935 wrk->last_tx_packets = n_tx_packets;
937 vlib_node_increment_counter (vm, session_queue_node.index,
938 SESSION_QUEUE_ERROR_TX, n_tx_packets);
940 SESSION_EVT_DBG (SESSION_EVT_DISPATCH_END, smm, thread_index);
946 VLIB_REGISTER_NODE (session_queue_node) =
948 .function = session_queue_node_fn,
949 .name = "session-queue",
950 .format_trace = format_session_queue_trace,
951 .type = VLIB_NODE_TYPE_INPUT,
952 .n_errors = ARRAY_LEN (session_queue_error_strings),
953 .error_strings = session_queue_error_strings,
954 .state = VLIB_NODE_STATE_DISABLED,
959 dump_thread_0_event_queue (void)
961 session_manager_main_t *smm = vnet_get_session_manager_main ();
962 vlib_main_t *vm = &vlib_global_main;
963 u32 my_thread_index = vm->thread_index;
964 session_event_t _e, *e = &_e;
965 svm_msg_q_ring_t *ring;
966 stream_session_t *s0;
967 svm_msg_q_msg_t *msg;
971 mq = smm->wrk[my_thread_index].vpp_event_queue;
974 for (i = 0; i < mq->q->cursize; i++)
976 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
977 ring = svm_msg_q_ring (mq, msg->ring_index);
978 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
980 switch (e->event_type)
982 case FIFO_EVENT_APP_TX:
983 s0 = session_event_get_session (e, my_thread_index);
984 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
987 case FIFO_EVENT_DISCONNECT:
988 s0 = session_get_from_handle (e->session_handle);
989 fformat (stdout, "[%04d] disconnect session %d\n", i,
993 case FIFO_EVENT_BUILTIN_RX:
994 s0 = session_event_get_session (e, my_thread_index);
995 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
999 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
1000 i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
1004 fformat (stdout, "[%04d] unhandled event type %d\n",
1011 if (index == mq->q->maxsize)
1017 session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
1019 stream_session_t *s;
1020 switch (e->event_type)
1022 case FIFO_EVENT_APP_RX:
1023 case FIFO_EVENT_APP_TX:
1024 case FIFO_EVENT_BUILTIN_RX:
1028 case FIFO_EVENT_DISCONNECT:
1030 case FIFO_EVENT_RPC:
1031 s = session_get_from_handle (e->session_handle);
1034 clib_warning ("session has event but doesn't exist!");
1037 if (s->server_rx_fifo == f || s->server_tx_fifo == f)
1047 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
1049 session_event_t *pending_event_vector, *evt;
1050 session_manager_worker_t *wrk;
1051 int i, index, found = 0;
1052 svm_msg_q_msg_t *msg;
1053 svm_msg_q_ring_t *ring;
1058 thread_index = f->master_thread_index;
1059 wrk = session_manager_get_worker (thread_index);
1064 mq = wrk->vpp_event_queue;
1065 index = mq->q->head;
1066 for (i = 0; i < mq->q->cursize; i++)
1068 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1069 ring = svm_msg_q_ring (mq, msg->ring_index);
1070 clib_memcpy_fast (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
1071 found = session_node_cmp_event (e, f);
1074 if (++index == mq->q->maxsize)
1078 * Search pending events vector
1080 pending_event_vector = wrk->pending_event_vector;
1081 vec_foreach (evt, pending_event_vector)
1083 found = session_node_cmp_event (evt, f);
1086 clib_memcpy_fast (e, evt, sizeof (*evt));
1093 static clib_error_t *
1094 session_queue_exit (vlib_main_t * vm)
1096 if (vec_len (vlib_mains) < 2)
1100 * Shut off (especially) worker-thread session nodes.
1101 * Otherwise, vpp can crash as the main thread unmaps the
1104 vlib_worker_thread_barrier_sync (vm);
1105 session_node_enable_disable (0 /* is_enable */ );
1106 vlib_worker_thread_barrier_release (vm);
1110 VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1113 session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1116 f64 now, timeout = 1.0;
1117 uword *event_data = 0;
1122 vlib_process_wait_for_event_or_clock (vm, timeout);
1123 now = vlib_time_now (vm);
1124 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1128 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1129 /* Flush the frames by updating all transports times */
1130 transport_update_time (now, 0);
1132 case SESSION_Q_PROCESS_STOP:
1136 /* Timed out. Update time for all transports to trigger all
1137 * outstanding retransmits. */
1138 transport_update_time (now, 0);
1141 vec_reset_length (event_data);
1147 VLIB_REGISTER_NODE (session_queue_process_node) =
1149 .function = session_queue_process,
1150 .type = VLIB_NODE_TYPE_PROCESS,
1151 .name = "session-queue-process",
1152 .state = VLIB_NODE_STATE_DISABLED,
1158 * fd.io coding-style-patch-verification: ON
1161 * eval: (c-set-style "gnu")