2 * Copyright (c) 2017-2019 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 * @brief Session and session manager
20 #include <vnet/session/session.h>
21 #include <vnet/session/application.h>
22 #include <vnet/dpo/load_balance.h>
23 #include <vnet/fib/ip4_fib.h>
25 session_main_t session_main;
28 session_send_evt_to_thread (void *data, void *args, u32 thread_index,
29 session_evt_type_t evt_type)
35 mq = session_main_get_vpp_event_queue (thread_index);
36 if (PREDICT_FALSE (svm_msg_q_lock (mq)))
38 if (PREDICT_FALSE (svm_msg_q_is_full (mq)
39 || svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
41 svm_msg_q_unlock (mq);
46 case SESSION_CTRL_EVT_RPC:
47 msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
48 evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
49 evt->rpc_args.fp = data;
50 evt->rpc_args.arg = args;
52 case SESSION_IO_EVT_RX:
53 case SESSION_IO_EVT_TX:
54 case SESSION_IO_EVT_TX_FLUSH:
55 case SESSION_IO_EVT_BUILTIN_RX:
56 msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
57 evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
58 evt->session_index = *(u32 *) data;
60 case SESSION_IO_EVT_BUILTIN_TX:
61 case SESSION_CTRL_EVT_CLOSE:
62 case SESSION_CTRL_EVT_RESET:
63 msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
64 evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
65 evt->session_handle = session_handle ((session_t *) data);
68 clib_warning ("evt unhandled!");
69 svm_msg_q_unlock (mq);
72 evt->event_type = evt_type;
74 svm_msg_q_add_and_unlock (mq, &msg);
79 session_send_io_evt_to_thread (svm_fifo_t * f, session_evt_type_t evt_type)
81 return session_send_evt_to_thread (&f->master_session_index, 0,
82 f->master_thread_index, evt_type);
86 session_send_io_evt_to_thread_custom (void *data, u32 thread_index,
87 session_evt_type_t evt_type)
89 return session_send_evt_to_thread (data, 0, thread_index, evt_type);
93 session_send_ctrl_evt_to_thread (session_t * s, session_evt_type_t evt_type)
95 /* only events supported are disconnect and reset */
96 ASSERT (evt_type == SESSION_CTRL_EVT_CLOSE
97 || evt_type == SESSION_CTRL_EVT_RESET);
98 return session_send_evt_to_thread (s, 0, s->thread_index, evt_type);
102 session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp,
105 session_send_evt_to_thread (fp, rpc_args, thread_index,
106 SESSION_CTRL_EVT_RPC);
110 session_send_rpc_evt_to_thread (u32 thread_index, void *fp, void *rpc_args)
112 if (thread_index != vlib_get_thread_index ())
113 session_send_rpc_evt_to_thread_force (thread_index, fp, rpc_args);
116 void (*fnp) (void *) = fp;
122 session_add_self_custom_tx_evt (transport_connection_t * tc, u8 has_prio)
126 s = session_get (tc->s_index, tc->thread_index);
127 ASSERT (s->thread_index == vlib_get_thread_index ());
128 ASSERT (s->session_state != SESSION_STATE_TRANSPORT_DELETED);
129 if (!(s->flags & SESSION_F_CUSTOM_TX))
131 s->flags |= SESSION_F_CUSTOM_TX;
132 if (svm_fifo_set_event (s->tx_fifo)
133 || transport_connection_is_descheduled (tc))
135 session_worker_t *wrk;
136 session_evt_elt_t *elt;
137 wrk = session_main_get_worker (tc->thread_index);
139 elt = session_evt_alloc_new (wrk);
141 elt = session_evt_alloc_old (wrk);
142 elt->evt.session_index = tc->s_index;
143 elt->evt.event_type = SESSION_IO_EVT_TX;
144 tc->flags &= ~TRANSPORT_CONNECTION_F_DESCHED;
150 sesssion_reschedule_tx (transport_connection_t * tc)
152 session_worker_t *wrk = session_main_get_worker (tc->thread_index);
153 session_evt_elt_t *elt;
155 ASSERT (tc->thread_index == vlib_get_thread_index ());
157 elt = session_evt_alloc_new (wrk);
158 elt->evt.session_index = tc->s_index;
159 elt->evt.event_type = SESSION_IO_EVT_TX;
163 session_program_transport_ctrl_evt (session_t * s, session_evt_type_t evt)
165 u32 thread_index = vlib_get_thread_index ();
166 session_evt_elt_t *elt;
167 session_worker_t *wrk;
169 /* If we are in the handler thread, or being called with the worker barrier
170 * held, just append a new event to pending disconnects vector. */
171 if (vlib_thread_is_main_w_barrier () || thread_index == s->thread_index)
173 wrk = session_main_get_worker (s->thread_index);
174 elt = session_evt_alloc_ctrl (wrk);
175 clib_memset (&elt->evt, 0, sizeof (session_event_t));
176 elt->evt.session_handle = session_handle (s);
177 elt->evt.event_type = evt;
180 session_send_ctrl_evt_to_thread (s, evt);
184 session_alloc (u32 thread_index)
186 session_worker_t *wrk = &session_main.wrk[thread_index];
189 pool_get_aligned_will_expand (wrk->sessions, will_expand,
190 CLIB_CACHE_LINE_BYTES);
191 /* If we have peekers, let them finish */
192 if (PREDICT_FALSE (will_expand && vlib_num_workers ()))
194 clib_rwlock_writer_lock (&wrk->peekers_rw_locks);
195 pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
196 clib_rwlock_writer_unlock (&wrk->peekers_rw_locks);
200 pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
202 clib_memset (s, 0, sizeof (*s));
203 s->session_index = s - wrk->sessions;
204 s->thread_index = thread_index;
205 s->app_index = APP_INVALID_INDEX;
210 session_free (session_t * s)
214 u8 thread_index = s->thread_index;
215 clib_memset (s, 0xFA, sizeof (*s));
216 pool_put (session_main.wrk[thread_index].sessions, s);
219 SESSION_EVT (SESSION_EVT_FREE, s);
220 pool_put (session_main.wrk[s->thread_index].sessions, s);
224 session_is_valid (u32 si, u8 thread_index)
227 transport_connection_t *tc;
229 s = pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
234 if (s->thread_index != thread_index || s->session_index != si)
237 if (s->session_state == SESSION_STATE_TRANSPORT_DELETED
238 || s->session_state <= SESSION_STATE_LISTENING)
241 tc = session_get_transport (s);
242 if (s->connection_index != tc->c_index
243 || s->thread_index != tc->thread_index || tc->s_index != si)
250 session_cleanup_notify (session_t * s, session_cleanup_ntf_t ntf)
252 app_worker_t *app_wrk;
254 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
257 app_worker_cleanup_notify (app_wrk, s, ntf);
261 session_free_w_fifos (session_t * s)
263 session_cleanup_notify (s, SESSION_CLEANUP_SESSION);
264 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
269 * Cleans up session and lookup table.
271 * Transport connection must still be valid.
274 session_delete (session_t * s)
278 /* Delete from the main lookup table. */
279 if ((rv = session_lookup_del_session (s)))
280 clib_warning ("session %u hash delete rv %d", s->session_index, rv);
282 session_free_w_fifos (s);
286 session_cleanup_half_open (transport_proto_t tp, session_handle_t ho_handle)
288 transport_cleanup_half_open (tp, session_handle_index (ho_handle));
292 session_half_open_delete_notify (transport_proto_t tp,
293 session_handle_t ho_handle)
295 app_worker_t *app_wrk = app_worker_get (session_handle_data (ho_handle));
296 app_worker_del_half_open (app_wrk, tp, ho_handle);
300 session_alloc_for_connection (transport_connection_t * tc)
303 u32 thread_index = tc->thread_index;
305 ASSERT (thread_index == vlib_get_thread_index ()
306 || transport_protocol_is_cl (tc->proto));
308 s = session_alloc (thread_index);
309 s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
310 s->session_state = SESSION_STATE_CLOSED;
312 /* Attach transport to session and vice versa */
313 s->connection_index = tc->c_index;
314 tc->s_index = s->session_index;
319 * Discards bytes from buffer chain
321 * It discards n_bytes_to_drop starting at first buffer after chain_b
324 session_enqueue_discard_chain_bytes (vlib_main_t * vm, vlib_buffer_t * b,
325 vlib_buffer_t ** chain_b,
328 vlib_buffer_t *next = *chain_b;
329 u32 to_drop = n_bytes_to_drop;
330 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
331 while (to_drop && (next->flags & VLIB_BUFFER_NEXT_PRESENT))
333 next = vlib_get_buffer (vm, next->next_buffer);
334 if (next->current_length > to_drop)
336 vlib_buffer_advance (next, to_drop);
341 to_drop -= next->current_length;
342 next->current_length = 0;
348 b->total_length_not_including_first_buffer -= n_bytes_to_drop;
352 * Enqueue buffer chain tail
355 session_enqueue_chain_tail (session_t * s, vlib_buffer_t * b,
356 u32 offset, u8 is_in_order)
358 vlib_buffer_t *chain_b;
359 u32 chain_bi, len, diff;
360 vlib_main_t *vm = vlib_get_main ();
365 if (is_in_order && offset)
367 diff = offset - b->current_length;
368 if (diff > b->total_length_not_including_first_buffer)
371 session_enqueue_discard_chain_bytes (vm, b, &chain_b, diff);
372 chain_bi = vlib_get_buffer_index (vm, chain_b);
375 chain_bi = b->next_buffer;
379 chain_b = vlib_get_buffer (vm, chain_bi);
380 data = vlib_buffer_get_current (chain_b);
381 len = chain_b->current_length;
386 rv = svm_fifo_enqueue (s->rx_fifo, len, data);
393 return (rv > 0) ? (written + rv) : written;
399 /* written more than what was left in chain */
400 if (written > b->total_length_not_including_first_buffer)
403 /* drop the bytes that have already been delivered */
404 session_enqueue_discard_chain_bytes (vm, b, &chain_b, rv - len);
409 rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset, len, data);
412 clib_warning ("failed to enqueue multi-buffer seg");
418 while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT)
419 ? chain_b->next_buffer : 0));
428 session_fifo_tuning (session_t * s, svm_fifo_t * f,
429 session_ft_action_t act, u32 len)
431 if (s->flags & SESSION_F_CUSTOM_FIFO_TUNING)
433 app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
434 app_worker_session_fifo_tuning (app_wrk, s, f, act, len);
435 if (CLIB_ASSERT_ENABLE)
437 segment_manager_t *sm;
438 sm = segment_manager_get (f->segment_manager);
439 ASSERT (f->size >= 4096);
440 ASSERT (f->size <= sm->max_fifo_size);
446 * Enqueue data for delivery to session peer. Does not notify peer of enqueue
447 * event but on request can queue notification events for later delivery by
448 * calling stream_server_flush_enqueue_events().
450 * @param tc Transport connection which is to be enqueued data
451 * @param b Buffer to be enqueued
452 * @param offset Offset at which to start enqueueing if out-of-order
453 * @param queue_event Flag to indicate if peer is to be notified or if event
454 * is to be queued. The former is useful when more data is
455 * enqueued and only one event is to be generated.
456 * @param is_in_order Flag to indicate if data is in order
457 * @return Number of bytes enqueued or a negative value if enqueueing failed.
460 session_enqueue_stream_connection (transport_connection_t * tc,
461 vlib_buffer_t * b, u32 offset,
462 u8 queue_event, u8 is_in_order)
465 int enqueued = 0, rv, in_order_off;
467 s = session_get (tc->s_index, tc->thread_index);
471 enqueued = svm_fifo_enqueue (s->rx_fifo,
473 vlib_buffer_get_current (b));
474 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT)
477 in_order_off = enqueued > b->current_length ? enqueued : 0;
478 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
485 rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset,
487 vlib_buffer_get_current (b));
488 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv))
489 session_enqueue_chain_tail (s, b, offset + b->current_length, 0);
490 /* if something was enqueued, report even this as success for ooo
491 * segment handling */
497 /* Queue RX event on this fifo. Eventually these will need to be flushed
498 * by calling stream_server_flush_enqueue_events () */
499 session_worker_t *wrk;
501 wrk = session_main_get_worker (s->thread_index);
502 if (!(s->flags & SESSION_F_RX_EVT))
504 s->flags |= SESSION_F_RX_EVT;
505 vec_add1 (wrk->session_to_enqueue[tc->proto], s->session_index);
508 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0);
515 session_enqueue_dgram_connection (session_t * s,
516 session_dgram_hdr_t * hdr,
517 vlib_buffer_t * b, u8 proto, u8 queue_event)
521 ASSERT (svm_fifo_max_enqueue_prod (s->rx_fifo)
522 >= b->current_length + sizeof (*hdr));
524 if (PREDICT_TRUE (!(b->flags & VLIB_BUFFER_NEXT_PRESENT)))
527 svm_fifo_seg_t segs[2] = {
528 { (u8 *) hdr, sizeof (*hdr) },
529 { vlib_buffer_get_current (b), b->current_length }
533 rv = svm_fifo_enqueue_segments (s->rx_fifo, segs, 2,
534 0 /* allow_partial */ );
538 vlib_main_t *vm = vlib_get_main ();
539 svm_fifo_seg_t *segs = 0, *seg;
540 vlib_buffer_t *it = b;
543 vec_add2 (segs, seg, 1);
544 seg->data = (u8 *) hdr;
545 seg->len = sizeof (*hdr);
548 vec_add2 (segs, seg, 1);
549 seg->data = vlib_buffer_get_current (it);
550 seg->len = it->current_length;
552 if (!(it->flags & VLIB_BUFFER_NEXT_PRESENT))
554 it = vlib_get_buffer (vm, it->next_buffer);
556 rv = svm_fifo_enqueue_segments (s->rx_fifo, segs, n_segs,
557 0 /* allow partial */ );
561 if (queue_event && rv > 0)
563 /* Queue RX event on this fifo. Eventually these will need to be flushed
564 * by calling stream_server_flush_enqueue_events () */
565 session_worker_t *wrk;
567 wrk = session_main_get_worker (s->thread_index);
568 if (!(s->flags & SESSION_F_RX_EVT))
570 s->flags |= SESSION_F_RX_EVT;
571 vec_add1 (wrk->session_to_enqueue[proto], s->session_index);
574 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0);
576 return rv > 0 ? rv : 0;
580 session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
581 u32 offset, u32 max_bytes)
583 session_t *s = session_get (tc->s_index, tc->thread_index);
584 return svm_fifo_peek (s->tx_fifo, offset, max_bytes, buffer);
588 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
590 session_t *s = session_get (tc->s_index, tc->thread_index);
593 rv = svm_fifo_dequeue_drop (s->tx_fifo, max_bytes);
594 session_fifo_tuning (s, s->tx_fifo, SESSION_FT_ACTION_DEQUEUED, rv);
596 if (svm_fifo_needs_deq_ntf (s->tx_fifo, max_bytes))
597 session_dequeue_notify (s);
603 session_notify_subscribers (u32 app_index, session_t * s,
604 svm_fifo_t * f, session_evt_type_t evt_type)
606 app_worker_t *app_wrk;
610 app = application_get (app_index);
614 for (i = 0; i < f->n_subscribers; i++)
616 app_wrk = application_get_worker (app, f->subscribers[i]);
619 if (app_worker_lock_and_send_event (app_wrk, s, evt_type))
627 * Notify session peer that new data has been enqueued.
629 * @param s Stream session for which the event is to be generated.
630 * @param lock Flag to indicate if call should lock message queue.
632 * @return 0 on success or negative number if failed to send notification.
635 session_enqueue_notify_inline (session_t * s)
637 app_worker_t *app_wrk;
641 session_index = s->session_index;
642 n_subscribers = svm_fifo_n_subscribers (s->rx_fifo);
644 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
645 if (PREDICT_FALSE (!app_wrk))
647 SESSION_DBG ("invalid s->app_index = %d", s->app_wrk_index);
651 SESSION_EVT (SESSION_EVT_ENQ, s, svm_fifo_max_dequeue_prod (s->rx_fifo));
653 s->flags &= ~SESSION_F_RX_EVT;
655 /* Application didn't confirm accept yet */
656 if (PREDICT_FALSE (s->session_state == SESSION_STATE_ACCEPTING))
659 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
663 if (PREDICT_FALSE (n_subscribers))
665 s = session_get (session_index, vlib_get_thread_index ());
666 return session_notify_subscribers (app_wrk->app_index, s,
667 s->rx_fifo, SESSION_IO_EVT_RX);
674 session_enqueue_notify (session_t * s)
676 return session_enqueue_notify_inline (s);
680 session_enqueue_notify_rpc (void *arg)
682 u32 session_index = pointer_to_uword (arg);
685 s = session_get_if_valid (session_index, vlib_get_thread_index ());
689 session_enqueue_notify (s);
693 * Like session_enqueue_notify, but can be called from a thread that does not
697 session_enqueue_notify_thread (session_handle_t sh)
699 u32 thread_index = session_thread_from_handle (sh);
700 u32 session_index = session_index_from_handle (sh);
703 * Pass session index (u32) as opposed to handle (u64) in case pointers
706 session_send_rpc_evt_to_thread (thread_index,
707 session_enqueue_notify_rpc,
708 uword_to_pointer (session_index, void *));
712 session_dequeue_notify (session_t * s)
714 app_worker_t *app_wrk;
716 svm_fifo_clear_deq_ntf (s->tx_fifo);
718 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
719 if (PREDICT_FALSE (!app_wrk))
722 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
726 if (PREDICT_FALSE (s->tx_fifo->n_subscribers))
727 return session_notify_subscribers (app_wrk->app_index, s,
728 s->tx_fifo, SESSION_IO_EVT_TX);
734 * Flushes queue of sessions that are to be notified of new data
737 * @param thread_index Thread index for which the flush is to be performed.
738 * @return 0 on success or a positive number indicating the number of
739 * failures due to API queue being full.
742 session_main_flush_enqueue_events (u8 transport_proto, u32 thread_index)
744 session_worker_t *wrk = session_main_get_worker (thread_index);
749 indices = wrk->session_to_enqueue[transport_proto];
751 for (i = 0; i < vec_len (indices); i++)
753 s = session_get_if_valid (indices[i], thread_index);
754 if (PREDICT_FALSE (!s))
760 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED,
761 0 /* TODO/not needed */ );
763 if (PREDICT_FALSE (session_enqueue_notify_inline (s)))
767 vec_reset_length (indices);
768 wrk->session_to_enqueue[transport_proto] = indices;
774 session_main_flush_all_enqueue_events (u8 transport_proto)
776 vlib_thread_main_t *vtm = vlib_get_thread_main ();
778 for (i = 0; i < 1 + vtm->n_threads; i++)
779 errors += session_main_flush_enqueue_events (transport_proto, i);
784 session_stream_connect_notify (transport_connection_t * tc,
787 session_handle_t ho_handle, wrk_handle;
788 u32 opaque = 0, new_ti, new_si;
789 app_worker_t *app_wrk;
793 * Find connection handle and cleanup half-open table
795 ho_handle = session_lookup_half_open_handle (tc);
796 if (ho_handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
798 SESSION_DBG ("half-open was removed!");
801 session_lookup_del_half_open (tc);
803 /* Get the app's index from the handle we stored when opening connection
804 * and the opaque (api_context for external apps) from transport session
806 app_wrk = app_worker_get_if_valid (session_handle_data (ho_handle));
810 wrk_handle = app_worker_lookup_half_open (app_wrk, tc->proto, ho_handle);
811 if (wrk_handle == SESSION_INVALID_HANDLE)
814 /* Make sure this is the same half-open index */
815 if (session_handle_index (wrk_handle) != session_handle_index (ho_handle))
818 opaque = session_handle_data (wrk_handle);
821 return app_worker_connect_notify (app_wrk, s, err, opaque);
823 s = session_alloc_for_connection (tc);
824 s->session_state = SESSION_STATE_CONNECTING;
825 s->app_wrk_index = app_wrk->wrk_index;
826 new_si = s->session_index;
827 new_ti = s->thread_index;
829 if ((err = app_worker_init_connected (app_wrk, s)))
832 app_worker_connect_notify (app_wrk, 0, err, opaque);
836 s = session_get (new_si, new_ti);
837 s->session_state = SESSION_STATE_READY;
838 session_lookup_add_connection (tc, session_handle (s));
840 if (app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque))
842 session_lookup_del_connection (tc);
843 /* Avoid notifying app about rejected session cleanup */
844 s = session_get (new_si, new_ti);
845 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
854 session_switch_pool_reply (void *arg)
856 u32 session_index = pointer_to_uword (arg);
857 segment_manager_t *sm;
858 app_worker_t *app_wrk;
861 s = session_get_if_valid (session_index, vlib_get_thread_index ());
865 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
869 /* Attach fifos to the right session and segment slice */
870 sm = app_worker_get_connect_segment_manager (app_wrk);
871 segment_manager_attach_fifo (sm, s->rx_fifo, s);
872 segment_manager_attach_fifo (sm, s->tx_fifo, s);
874 /* Notify app that it has data on the new session */
875 session_enqueue_notify (s);
878 typedef struct _session_switch_pool_args
882 u32 new_thread_index;
883 u32 new_session_index;
884 } session_switch_pool_args_t;
887 * Notify old thread of the session pool switch
890 session_switch_pool (void *cb_args)
892 session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
893 session_handle_t new_sh;
894 segment_manager_t *sm;
895 app_worker_t *app_wrk;
899 ASSERT (args->thread_index == vlib_get_thread_index ());
900 s = session_get (args->session_index, args->thread_index);
902 transport_cleanup (session_get_transport_proto (s), s->connection_index,
905 new_sh = session_make_handle (args->new_session_index,
906 args->new_thread_index);
908 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
911 /* Cleanup fifo segment slice state for fifos */
912 sm = app_worker_get_connect_segment_manager (app_wrk);
913 segment_manager_detach_fifo (sm, s->rx_fifo);
914 segment_manager_detach_fifo (sm, s->tx_fifo);
916 /* Notify app, using old session, about the migration event */
917 app_worker_migrate_notify (app_wrk, s, new_sh);
920 /* Trigger app read and fifo updates on the new thread */
921 rargs = uword_to_pointer (args->new_session_index, void *);
922 session_send_rpc_evt_to_thread (args->new_thread_index,
923 session_switch_pool_reply, rargs);
926 clib_mem_free (cb_args);
930 * Move dgram session to the right thread
933 session_dgram_connect_notify (transport_connection_t * tc,
934 u32 old_thread_index, session_t ** new_session)
937 session_switch_pool_args_t *rpc_args;
940 * Clone half-open session to the right thread.
942 new_s = session_clone_safe (tc->s_index, old_thread_index);
943 new_s->connection_index = tc->c_index;
944 new_s->session_state = SESSION_STATE_READY;
945 new_s->flags |= SESSION_F_IS_MIGRATING;
947 session_lookup_add_connection (tc, session_handle (new_s));
950 * Ask thread owning the old session to clean it up and make us the tx
953 rpc_args = clib_mem_alloc (sizeof (*rpc_args));
954 rpc_args->new_session_index = new_s->session_index;
955 rpc_args->new_thread_index = new_s->thread_index;
956 rpc_args->session_index = tc->s_index;
957 rpc_args->thread_index = old_thread_index;
958 session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool,
961 tc->s_index = new_s->session_index;
962 new_s->connection_index = tc->c_index;
963 *new_session = new_s;
968 * Notification from transport that connection is being closed.
970 * A disconnect is sent to application but state is not removed. Once
971 * disconnect is acknowledged by application, session disconnect is called.
972 * Ultimately this leads to close being called on transport (passive close).
975 session_transport_closing_notify (transport_connection_t * tc)
977 app_worker_t *app_wrk;
980 s = session_get (tc->s_index, tc->thread_index);
981 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
983 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
984 app_wrk = app_worker_get (s->app_wrk_index);
985 app_worker_close_notify (app_wrk, s);
989 * Notification from transport that connection is being deleted
991 * This removes the session if it is still valid. It should be called only on
992 * previously fully established sessions. For instance failed connects should
993 * call stream_session_connect_notify and indicate that the connect has
997 session_transport_delete_notify (transport_connection_t * tc)
1001 /* App might've been removed already */
1002 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
1005 switch (s->session_state)
1007 case SESSION_STATE_CREATED:
1008 /* Session was created but accept notification was not yet sent to the
1009 * app. Cleanup everything. */
1010 session_lookup_del_session (s);
1011 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1014 case SESSION_STATE_ACCEPTING:
1015 case SESSION_STATE_TRANSPORT_CLOSING:
1016 case SESSION_STATE_CLOSING:
1017 case SESSION_STATE_TRANSPORT_CLOSED:
1018 /* If transport finishes or times out before we get a reply
1019 * from the app, mark transport as closed and wait for reply
1020 * before removing the session. Cleanup session table in advance
1021 * because transport will soon be closed and closed sessions
1022 * are assumed to have been removed from the lookup table */
1023 session_lookup_del_session (s);
1024 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
1025 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1026 svm_fifo_dequeue_drop_all (s->tx_fifo);
1028 case SESSION_STATE_APP_CLOSED:
1029 /* Cleanup lookup table as transport needs to still be valid.
1030 * Program transport close to ensure that all session events
1031 * have been cleaned up. Once transport close is called, the
1032 * session is just removed because both transport and app have
1033 * confirmed the close*/
1034 session_lookup_del_session (s);
1035 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
1036 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1037 svm_fifo_dequeue_drop_all (s->tx_fifo);
1038 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1040 case SESSION_STATE_TRANSPORT_DELETED:
1042 case SESSION_STATE_CLOSED:
1043 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1047 clib_warning ("session state %u", s->session_state);
1048 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1055 * Notification from transport that it is closed
1057 * Should be called by transport, prior to calling delete notify, once it
1058 * knows that no more data will be exchanged. This could serve as an
1059 * early acknowledgment of an active close especially if transport delete
1060 * can be delayed a long time, e.g., tcp time-wait.
1063 session_transport_closed_notify (transport_connection_t * tc)
1065 app_worker_t *app_wrk;
1068 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
1071 /* Transport thinks that app requested close but it actually didn't.
1072 * Can happen for tcp if fin and rst are received in close succession. */
1073 if (s->session_state == SESSION_STATE_READY)
1075 session_transport_closing_notify (tc);
1076 svm_fifo_dequeue_drop_all (s->tx_fifo);
1077 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
1079 /* If app close has not been received or has not yet resulted in
1080 * a transport close, only mark the session transport as closed */
1081 else if (s->session_state <= SESSION_STATE_CLOSING)
1083 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
1085 /* If app also closed, switch to closed */
1086 else if (s->session_state == SESSION_STATE_APP_CLOSED)
1087 s->session_state = SESSION_STATE_CLOSED;
1089 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1091 app_worker_transport_closed_notify (app_wrk, s);
1095 * Notify application that connection has been reset.
1098 session_transport_reset_notify (transport_connection_t * tc)
1100 app_worker_t *app_wrk;
1103 s = session_get (tc->s_index, tc->thread_index);
1104 svm_fifo_dequeue_drop_all (s->tx_fifo);
1105 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
1107 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
1108 app_wrk = app_worker_get (s->app_wrk_index);
1109 app_worker_reset_notify (app_wrk, s);
1113 session_stream_accept_notify (transport_connection_t * tc)
1115 app_worker_t *app_wrk;
1118 s = session_get (tc->s_index, tc->thread_index);
1119 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1122 s->session_state = SESSION_STATE_ACCEPTING;
1123 if (app_worker_accept_notify (app_wrk, s))
1125 /* On transport delete, no notifications should be sent. Unless, the
1126 * accept is retried and successful. */
1127 s->session_state = SESSION_STATE_CREATED;
1134 * Accept a stream session. Optionally ping the server by callback.
1137 session_stream_accept (transport_connection_t * tc, u32 listener_index,
1138 u32 thread_index, u8 notify)
1143 s = session_alloc_for_connection (tc);
1144 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1145 s->session_state = SESSION_STATE_CREATED;
1147 if ((rv = app_worker_init_accepted (s)))
1153 session_lookup_add_connection (tc, session_handle (s));
1155 /* Shoulder-tap the server */
1158 app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
1159 if ((rv = app_worker_accept_notify (app_wrk, s)))
1161 session_lookup_del_session (s);
1162 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1172 session_dgram_accept (transport_connection_t * tc, u32 listener_index,
1175 app_worker_t *app_wrk;
1179 s = session_alloc_for_connection (tc);
1180 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1182 if ((rv = app_worker_init_accepted (s)))
1188 session_lookup_add_connection (tc, session_handle (s));
1190 app_wrk = app_worker_get (s->app_wrk_index);
1191 if ((rv = app_worker_accept_notify (app_wrk, s)))
1193 session_lookup_del_session (s);
1194 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1199 s->session_state = SESSION_STATE_READY;
1205 session_open_cl (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1207 transport_connection_t *tc;
1208 transport_endpoint_cfg_t *tep;
1209 app_worker_t *app_wrk;
1210 session_handle_t sh;
1214 tep = session_endpoint_to_transport_cfg (rmt);
1215 rv = transport_connect (rmt->transport_proto, tep);
1218 SESSION_DBG ("Transport failed to open connection.");
1222 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1224 /* For dgram type of service, allocate session and fifos now */
1225 app_wrk = app_worker_get (app_wrk_index);
1226 s = session_alloc_for_connection (tc);
1227 s->app_wrk_index = app_wrk->wrk_index;
1228 s->session_state = SESSION_STATE_OPENED;
1229 if (app_worker_init_connected (app_wrk, s))
1235 sh = session_handle (s);
1236 session_lookup_add_connection (tc, sh);
1237 return app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque);
1241 session_open_vc (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1243 transport_connection_t *tc;
1244 transport_endpoint_cfg_t *tep;
1245 u64 handle, wrk_handle;
1248 tep = session_endpoint_to_transport_cfg (rmt);
1249 rv = transport_connect (rmt->transport_proto, tep);
1252 SESSION_DBG ("Transport failed to open connection.");
1256 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1258 /* If transport offers a stream service, only allocate session once the
1259 * connection has been established.
1260 * Add connection to half-open table and save app and tc index. The
1261 * latter is needed to help establish the connection while the former
1262 * is needed when the connect notify comes and we have to notify the
1265 handle = session_make_handle (tc->c_index, app_wrk_index);
1266 session_lookup_add_half_open (tc, handle);
1268 /* Store the half-open handle in the connection. Transport will use it
1269 * when cleaning up @ref session_half_open_delete_notify
1271 tc->s_ho_handle = handle;
1273 /* Track the half-open connections in case we want to forcefully
1274 * clean them up @ref session_cleanup_half_open
1276 wrk_handle = session_make_handle (tc->c_index, opaque);
1277 app_worker_add_half_open (app_worker_get (app_wrk_index),
1278 rmt->transport_proto, handle, wrk_handle);
1284 session_open_app (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1286 session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) rmt;
1287 transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (sep);
1289 sep->app_wrk_index = app_wrk_index;
1290 sep->opaque = opaque;
1292 return transport_connect (rmt->transport_proto, tep_cfg);
1295 typedef int (*session_open_service_fn) (u32, session_endpoint_t *, u32);
1298 static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = {
1306 * Ask transport to open connection to remote transport endpoint.
1308 * Stores handle for matching request with reply since the call can be
1309 * asynchronous. For instance, for TCP the 3-way handshake must complete
1310 * before reply comes. Session is only created once connection is established.
1312 * @param app_index Index of the application requesting the connect
1313 * @param st Session type requested.
1314 * @param tep Remote transport endpoint
1315 * @param opaque Opaque data (typically, api_context) the application expects
1316 * on open completion.
1319 session_open (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1321 transport_service_type_t tst;
1322 tst = transport_protocol_service_type (rmt->transport_proto);
1323 return session_open_srv_fns[tst] (app_wrk_index, rmt, opaque);
1327 * Ask transport to listen on session endpoint.
1329 * @param s Session for which listen will be called. Note that unlike
1330 * established sessions, listen sessions are not associated to a
1332 * @param sep Local endpoint to be listened on.
1335 session_listen (session_t * ls, session_endpoint_cfg_t * sep)
1337 transport_endpoint_t *tep;
1341 /* Transport bind/listen */
1342 tep = session_endpoint_to_transport (sep);
1343 s_index = ls->session_index;
1344 tc_index = transport_start_listen (session_get_transport_proto (ls),
1350 /* Attach transport to session. Lookup tables are populated by the app
1351 * worker because local tables (for ct sessions) are not backed by a fib */
1352 ls = listen_session_get (s_index);
1353 ls->connection_index = tc_index;
1359 * Ask transport to stop listening on local transport endpoint.
1361 * @param s Session to stop listening on. It must be in state LISTENING.
1364 session_stop_listen (session_t * s)
1366 transport_proto_t tp = session_get_transport_proto (s);
1367 transport_connection_t *tc;
1369 if (s->session_state != SESSION_STATE_LISTENING)
1370 return SESSION_E_NOLISTEN;
1372 tc = transport_get_listener (tp, s->connection_index);
1374 /* If no transport, assume everything was cleaned up already */
1376 return SESSION_E_NONE;
1378 if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
1379 session_lookup_del_connection (tc);
1381 transport_stop_listen (tp, s->connection_index);
1386 * Initialize session closing procedure.
1388 * Request is always sent to session node to ensure that all outstanding
1389 * requests are served before transport is notified.
1392 session_close (session_t * s)
1397 if (s->session_state >= SESSION_STATE_CLOSING)
1399 /* Session will only be removed once both app and transport
1400 * acknowledge the close */
1401 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED
1402 || s->session_state == SESSION_STATE_TRANSPORT_DELETED)
1403 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1407 s->session_state = SESSION_STATE_CLOSING;
1408 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1412 * Force a close without waiting for data to be flushed
1415 session_reset (session_t * s)
1417 if (s->session_state >= SESSION_STATE_CLOSING)
1419 /* Drop all outstanding tx data */
1420 svm_fifo_dequeue_drop_all (s->tx_fifo);
1421 s->session_state = SESSION_STATE_CLOSING;
1422 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_RESET);
1426 * Notify transport the session can be disconnected. This should eventually
1427 * result in a delete notification that allows us to cleanup session state.
1428 * Called for both active/passive disconnects.
1430 * Must be called from the session's thread.
1433 session_transport_close (session_t * s)
1435 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1437 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1438 s->session_state = SESSION_STATE_CLOSED;
1439 /* If transport is already deleted, just free the session */
1440 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1441 session_free_w_fifos (s);
1445 /* If the tx queue wasn't drained, the transport can continue to try
1446 * sending the outstanding data (in closed state it cannot). It MUST however
1447 * at one point, either after sending everything or after a timeout, call
1448 * delete notify. This will finally lead to the complete cleanup of the
1451 s->session_state = SESSION_STATE_APP_CLOSED;
1453 transport_close (session_get_transport_proto (s), s->connection_index,
1458 * Force transport close
1461 session_transport_reset (session_t * s)
1463 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1465 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1466 s->session_state = SESSION_STATE_CLOSED;
1467 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1468 session_free_w_fifos (s);
1472 s->session_state = SESSION_STATE_APP_CLOSED;
1473 transport_reset (session_get_transport_proto (s), s->connection_index,
1478 * Cleanup transport and session state.
1480 * Notify transport of the cleanup and free the session. This should
1481 * be called only if transport reported some error and is already
1485 session_transport_cleanup (session_t * s)
1487 /* Delete from main lookup table before we axe the the transport */
1488 session_lookup_del_session (s);
1489 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED)
1490 transport_cleanup (session_get_transport_proto (s), s->connection_index,
1492 /* Since we called cleanup, no delete notification will come. So, make
1493 * sure the session is properly freed. */
1494 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1499 * Allocate event queues in the shared-memory segment
1501 * That can only be a newly created memfd segment, that must be
1502 * mapped by all apps/stack users.
1505 session_vpp_event_queues_allocate (session_main_t * smm)
1507 u32 evt_q_length = 2048, evt_size = sizeof (session_event_t);
1508 ssvm_private_t *eqs = &smm->evt_qs_segment;
1509 uword eqs_size = 64 << 20;
1510 pid_t vpp_pid = getpid ();
1514 if (smm->configured_event_queue_length)
1515 evt_q_length = smm->configured_event_queue_length;
1517 if (smm->evt_qs_segment_size)
1518 eqs_size = smm->evt_qs_segment_size;
1520 eqs->ssvm_size = eqs_size;
1521 eqs->my_pid = vpp_pid;
1522 eqs->name = format (0, "%s%c", "session: evt-qs-segment", 0);
1523 /* clib_mem_vm_map_shared consumes first page before requested_va */
1524 eqs->requested_va = smm->session_baseva + clib_mem_get_page_size ();
1526 if (ssvm_server_init (eqs, SSVM_SEGMENT_MEMFD))
1528 clib_warning ("failed to initialize queue segment");
1532 oldheap = ssvm_push_heap (eqs->sh);
1534 for (i = 0; i < vec_len (smm->wrk); i++)
1536 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
1537 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
1538 {evt_q_length, evt_size, 0}
1540 {evt_q_length >> 1, 256, 0}
1542 cfg->consumer_pid = 0;
1544 cfg->q_nitems = evt_q_length;
1545 cfg->ring_cfgs = rc;
1546 smm->wrk[i].vpp_event_queue = svm_msg_q_alloc (cfg);
1547 if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue))
1548 clib_warning ("eventfd returned");
1551 ssvm_pop_heap (oldheap);
1555 session_main_get_evt_q_segment (void)
1557 return &session_main.evt_qs_segment;
1561 session_segment_handle (session_t * s)
1566 return SESSION_INVALID_HANDLE;
1569 return segment_manager_make_segment_handle (f->segment_manager,
1574 static session_fifo_rx_fn *session_tx_fns[TRANSPORT_TX_N_FNS] = {
1575 session_tx_fifo_peek_and_snd,
1576 session_tx_fifo_dequeue_and_snd,
1577 session_tx_fifo_dequeue_internal,
1578 session_tx_fifo_dequeue_and_snd
1583 session_register_transport (transport_proto_t transport_proto,
1584 const transport_proto_vft_t * vft, u8 is_ip4,
1587 session_main_t *smm = &session_main;
1588 session_type_t session_type;
1589 u32 next_index = ~0;
1591 session_type = session_type_from_proto_and_ip (transport_proto, is_ip4);
1593 vec_validate (smm->session_type_to_next, session_type);
1594 vec_validate (smm->session_tx_fns, session_type);
1597 if (output_node != ~0)
1599 foreach_vlib_main (({
1600 next_index = vlib_node_add_next (this_vlib_main,
1601 session_queue_node.index,
1607 smm->session_type_to_next[session_type] = next_index;
1608 smm->session_tx_fns[session_type] =
1609 session_tx_fns[vft->transport_options.tx_type];
1613 session_add_transport_proto (void)
1615 session_main_t *smm = &session_main;
1616 session_worker_t *wrk;
1619 smm->last_transport_proto_type += 1;
1621 for (thread = 0; thread < vec_len (smm->wrk); thread++)
1623 wrk = session_main_get_worker (thread);
1624 vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type);
1627 return smm->last_transport_proto_type;
1630 transport_connection_t *
1631 session_get_transport (session_t * s)
1633 if (s->session_state != SESSION_STATE_LISTENING)
1634 return transport_get_connection (session_get_transport_proto (s),
1635 s->connection_index, s->thread_index);
1637 return transport_get_listener (session_get_transport_proto (s),
1638 s->connection_index);
1642 session_get_endpoint (session_t * s, transport_endpoint_t * tep, u8 is_lcl)
1644 if (s->session_state != SESSION_STATE_LISTENING)
1645 return transport_get_endpoint (session_get_transport_proto (s),
1646 s->connection_index, s->thread_index, tep,
1649 return transport_get_listener_endpoint (session_get_transport_proto (s),
1650 s->connection_index, tep, is_lcl);
1653 transport_connection_t *
1654 listen_session_get_transport (session_t * s)
1656 return transport_get_listener (session_get_transport_proto (s),
1657 s->connection_index);
1661 session_queue_run_on_main_thread (vlib_main_t * vm)
1663 ASSERT (vlib_get_thread_index () == 0);
1664 vlib_process_signal_event_mt (vm, session_queue_process_node.index,
1665 SESSION_Q_PROCESS_RUN_ON_MAIN, 0);
1668 static clib_error_t *
1669 session_manager_main_enable (vlib_main_t * vm)
1671 segment_manager_main_init_args_t _sm_args = { 0 }, *sm_args = &_sm_args;
1672 session_main_t *smm = &session_main;
1673 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1674 u32 num_threads, preallocated_sessions_per_worker;
1675 uword margin = 8 << 12;
1676 session_worker_t *wrk;
1679 /* We only initialize once and do not de-initialized on disable */
1680 if (smm->is_initialized)
1683 num_threads = 1 /* main thread */ + vtm->n_threads;
1685 if (num_threads < 1)
1686 return clib_error_return (0, "n_thread_stacks not set");
1688 /* Allocate cache line aligned worker contexts */
1689 vec_validate_aligned (smm->wrk, num_threads - 1, CLIB_CACHE_LINE_BYTES);
1691 for (i = 0; i < num_threads; i++)
1694 wrk->ctrl_head = clib_llist_make_head (wrk->event_elts, evt_list);
1695 wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list);
1696 wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list);
1697 wrk->vm = vlib_mains[i];
1698 wrk->last_vlib_time = vlib_time_now (vm);
1699 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1700 vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type);
1702 if (num_threads > 1)
1703 clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
1706 /* Allocate vpp event queues segment and queue */
1707 session_vpp_event_queues_allocate (smm);
1709 /* Initialize fifo segment main baseva and timeout */
1710 sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size + margin;
1711 sm_args->size = smm->session_va_space_size;
1712 segment_manager_main_init (sm_args);
1714 /* Preallocate sessions */
1715 if (smm->preallocated_sessions)
1717 if (num_threads == 1)
1719 pool_init_fixed (smm->wrk[0].sessions, smm->preallocated_sessions);
1724 preallocated_sessions_per_worker =
1725 (1.1 * (f64) smm->preallocated_sessions /
1726 (f64) (num_threads - 1));
1728 for (j = 1; j < num_threads; j++)
1730 pool_init_fixed (smm->wrk[j].sessions,
1731 preallocated_sessions_per_worker);
1736 session_lookup_init ();
1737 app_namespaces_init ();
1739 smm->is_initialized = 1;
1743 smm->is_enabled = 1;
1745 /* Enable transports */
1746 transport_enable_disable (vm, 1);
1747 session_debug_init ();
1753 session_manager_main_disable (vlib_main_t * vm)
1755 transport_enable_disable (vm, 0 /* is_en */ );
1759 session_node_enable_disable (u8 is_en)
1761 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
1762 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1763 u8 have_workers = vtm->n_threads != 0;
1766 foreach_vlib_main (({
1767 if (have_workers && ii == 0)
1771 vlib_node_set_state (this_vlib_main,
1772 session_queue_process_node.index, state);
1773 vlib_node_t *n = vlib_get_node (this_vlib_main,
1774 session_queue_process_node.index);
1775 vlib_start_process (this_vlib_main, n->runtime_index);
1779 vlib_process_signal_event_mt (this_vlib_main,
1780 session_queue_process_node.index,
1781 SESSION_Q_PROCESS_STOP, 0);
1786 vlib_node_set_state (this_vlib_main, session_queue_node.index,
1793 vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
1795 clib_error_t *error = 0;
1798 if (session_main.is_enabled)
1801 error = session_manager_main_enable (vm);
1802 session_node_enable_disable (is_en);
1806 session_main.is_enabled = 0;
1807 session_manager_main_disable (vm);
1808 session_node_enable_disable (is_en);
1815 session_main_init (vlib_main_t * vm)
1817 session_main_t *smm = &session_main;
1819 smm->is_enabled = 0;
1820 smm->session_enable_asap = 0;
1821 smm->session_baseva = HIGH_SEGMENT_BASEVA;
1823 #if (HIGH_SEGMENT_BASEVA > (4ULL << 30))
1824 smm->session_va_space_size = 128ULL << 30;
1825 smm->evt_qs_segment_size = 64 << 20;
1827 smm->session_va_space_size = 128 << 20;
1828 smm->evt_qs_segment_size = 1 << 20;
1831 smm->last_transport_proto_type = TRANSPORT_PROTO_QUIC;
1836 static clib_error_t *
1837 session_main_loop_init (vlib_main_t * vm)
1839 session_main_t *smm = &session_main;
1840 if (smm->session_enable_asap)
1842 vlib_worker_thread_barrier_sync (vm);
1843 vnet_session_enable_disable (vm, 1 /* is_en */ );
1844 vlib_worker_thread_barrier_release (vm);
1849 VLIB_INIT_FUNCTION (session_main_init);
1850 VLIB_MAIN_LOOP_ENTER_FUNCTION (session_main_loop_init);
1852 static clib_error_t *
1853 session_config_fn (vlib_main_t * vm, unformat_input_t * input)
1855 session_main_t *smm = &session_main;
1859 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1861 if (unformat (input, "event-queue-length %d", &nitems))
1864 smm->configured_event_queue_length = nitems;
1866 clib_warning ("event queue length %d too small, ignored", nitems);
1868 else if (unformat (input, "preallocated-sessions %d",
1869 &smm->preallocated_sessions))
1871 else if (unformat (input, "v4-session-table-buckets %d",
1872 &smm->configured_v4_session_table_buckets))
1874 else if (unformat (input, "v4-halfopen-table-buckets %d",
1875 &smm->configured_v4_halfopen_table_buckets))
1877 else if (unformat (input, "v6-session-table-buckets %d",
1878 &smm->configured_v6_session_table_buckets))
1880 else if (unformat (input, "v6-halfopen-table-buckets %d",
1881 &smm->configured_v6_halfopen_table_buckets))
1883 else if (unformat (input, "v4-session-table-memory %U",
1884 unformat_memory_size, &tmp))
1886 if (tmp >= 0x100000000)
1887 return clib_error_return (0, "memory size %llx (%lld) too large",
1889 smm->configured_v4_session_table_memory = tmp;
1891 else if (unformat (input, "v4-halfopen-table-memory %U",
1892 unformat_memory_size, &tmp))
1894 if (tmp >= 0x100000000)
1895 return clib_error_return (0, "memory size %llx (%lld) too large",
1897 smm->configured_v4_halfopen_table_memory = tmp;
1899 else if (unformat (input, "v6-session-table-memory %U",
1900 unformat_memory_size, &tmp))
1902 if (tmp >= 0x100000000)
1903 return clib_error_return (0, "memory size %llx (%lld) too large",
1905 smm->configured_v6_session_table_memory = tmp;
1907 else if (unformat (input, "v6-halfopen-table-memory %U",
1908 unformat_memory_size, &tmp))
1910 if (tmp >= 0x100000000)
1911 return clib_error_return (0, "memory size %llx (%lld) too large",
1913 smm->configured_v6_halfopen_table_memory = tmp;
1915 else if (unformat (input, "local-endpoints-table-memory %U",
1916 unformat_memory_size, &tmp))
1918 if (tmp >= 0x100000000)
1919 return clib_error_return (0, "memory size %llx (%lld) too large",
1921 smm->local_endpoints_table_memory = tmp;
1923 else if (unformat (input, "local-endpoints-table-buckets %d",
1924 &smm->local_endpoints_table_buckets))
1926 /* Deprecated but maintained for compatibility */
1927 else if (unformat (input, "evt_qs_memfd_seg"))
1929 else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
1930 &smm->evt_qs_segment_size))
1932 else if (unformat (input, "enable"))
1933 smm->session_enable_asap = 1;
1934 else if (unformat (input, "segment-baseva 0x%lx", &smm->session_baseva))
1936 else if (unformat (input, "use-app-socket-api"))
1937 appns_sapi_enable ();
1939 return clib_error_return (0, "unknown input `%U'",
1940 format_unformat_error, input);
1945 VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1948 * fd.io coding-style-patch-verification: ON
1951 * eval: (c-set-style "gnu")