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)
519 int enqueued = 0, rv, in_order_off;
521 ASSERT (svm_fifo_max_enqueue_prod (s->rx_fifo)
522 >= b->current_length + sizeof (*hdr));
524 svm_fifo_enqueue (s->rx_fifo, sizeof (session_dgram_hdr_t), (u8 *) hdr);
525 enqueued = svm_fifo_enqueue (s->rx_fifo, b->current_length,
526 vlib_buffer_get_current (b));
527 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0))
529 in_order_off = enqueued > b->current_length ? enqueued : 0;
530 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
536 /* Queue RX event on this fifo. Eventually these will need to be flushed
537 * by calling stream_server_flush_enqueue_events () */
538 session_worker_t *wrk;
540 wrk = session_main_get_worker (s->thread_index);
541 if (!(s->flags & SESSION_F_RX_EVT))
543 s->flags |= SESSION_F_RX_EVT;
544 vec_add1 (wrk->session_to_enqueue[proto], s->session_index);
547 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0);
553 session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
554 u32 offset, u32 max_bytes)
556 session_t *s = session_get (tc->s_index, tc->thread_index);
557 return svm_fifo_peek (s->tx_fifo, offset, max_bytes, buffer);
561 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
563 session_t *s = session_get (tc->s_index, tc->thread_index);
566 rv = svm_fifo_dequeue_drop (s->tx_fifo, max_bytes);
567 session_fifo_tuning (s, s->tx_fifo, SESSION_FT_ACTION_DEQUEUED, rv);
569 if (svm_fifo_needs_deq_ntf (s->tx_fifo, max_bytes))
570 session_dequeue_notify (s);
576 session_notify_subscribers (u32 app_index, session_t * s,
577 svm_fifo_t * f, session_evt_type_t evt_type)
579 app_worker_t *app_wrk;
583 app = application_get (app_index);
587 for (i = 0; i < f->n_subscribers; i++)
589 app_wrk = application_get_worker (app, f->subscribers[i]);
592 if (app_worker_lock_and_send_event (app_wrk, s, evt_type))
600 * Notify session peer that new data has been enqueued.
602 * @param s Stream session for which the event is to be generated.
603 * @param lock Flag to indicate if call should lock message queue.
605 * @return 0 on success or negative number if failed to send notification.
608 session_enqueue_notify_inline (session_t * s)
610 app_worker_t *app_wrk;
614 session_index = s->session_index;
615 n_subscribers = svm_fifo_n_subscribers (s->rx_fifo);
617 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
618 if (PREDICT_FALSE (!app_wrk))
620 SESSION_DBG ("invalid s->app_index = %d", s->app_wrk_index);
624 SESSION_EVT (SESSION_EVT_ENQ, s, svm_fifo_max_dequeue_prod (s->rx_fifo));
626 s->flags &= ~SESSION_F_RX_EVT;
628 /* Application didn't confirm accept yet */
629 if (PREDICT_FALSE (s->session_state == SESSION_STATE_ACCEPTING))
632 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
636 if (PREDICT_FALSE (n_subscribers))
638 s = session_get (session_index, vlib_get_thread_index ());
639 return session_notify_subscribers (app_wrk->app_index, s,
640 s->rx_fifo, SESSION_IO_EVT_RX);
647 session_enqueue_notify (session_t * s)
649 return session_enqueue_notify_inline (s);
653 session_enqueue_notify_rpc (void *arg)
655 u32 session_index = pointer_to_uword (arg);
658 s = session_get_if_valid (session_index, vlib_get_thread_index ());
662 session_enqueue_notify (s);
666 * Like session_enqueue_notify, but can be called from a thread that does not
670 session_enqueue_notify_thread (session_handle_t sh)
672 u32 thread_index = session_thread_from_handle (sh);
673 u32 session_index = session_index_from_handle (sh);
676 * Pass session index (u32) as opposed to handle (u64) in case pointers
679 session_send_rpc_evt_to_thread (thread_index,
680 session_enqueue_notify_rpc,
681 uword_to_pointer (session_index, void *));
685 session_dequeue_notify (session_t * s)
687 app_worker_t *app_wrk;
689 svm_fifo_clear_deq_ntf (s->tx_fifo);
691 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
692 if (PREDICT_FALSE (!app_wrk))
695 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
699 if (PREDICT_FALSE (s->tx_fifo->n_subscribers))
700 return session_notify_subscribers (app_wrk->app_index, s,
701 s->tx_fifo, SESSION_IO_EVT_TX);
707 * Flushes queue of sessions that are to be notified of new data
710 * @param thread_index Thread index for which the flush is to be performed.
711 * @return 0 on success or a positive number indicating the number of
712 * failures due to API queue being full.
715 session_main_flush_enqueue_events (u8 transport_proto, u32 thread_index)
717 session_worker_t *wrk = session_main_get_worker (thread_index);
722 indices = wrk->session_to_enqueue[transport_proto];
724 for (i = 0; i < vec_len (indices); i++)
726 s = session_get_if_valid (indices[i], thread_index);
727 if (PREDICT_FALSE (!s))
733 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED,
734 0 /* TODO/not needed */ );
736 if (PREDICT_FALSE (session_enqueue_notify_inline (s)))
740 vec_reset_length (indices);
741 wrk->session_to_enqueue[transport_proto] = indices;
747 session_main_flush_all_enqueue_events (u8 transport_proto)
749 vlib_thread_main_t *vtm = vlib_get_thread_main ();
751 for (i = 0; i < 1 + vtm->n_threads; i++)
752 errors += session_main_flush_enqueue_events (transport_proto, i);
757 session_stream_connect_notify (transport_connection_t * tc,
760 session_handle_t ho_handle, wrk_handle;
761 u32 opaque = 0, new_ti, new_si;
762 app_worker_t *app_wrk;
766 * Find connection handle and cleanup half-open table
768 ho_handle = session_lookup_half_open_handle (tc);
769 if (ho_handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
771 SESSION_DBG ("half-open was removed!");
774 session_lookup_del_half_open (tc);
776 /* Get the app's index from the handle we stored when opening connection
777 * and the opaque (api_context for external apps) from transport session
779 app_wrk = app_worker_get_if_valid (session_handle_data (ho_handle));
783 wrk_handle = app_worker_lookup_half_open (app_wrk, tc->proto, ho_handle);
784 if (wrk_handle == SESSION_INVALID_HANDLE)
787 /* Make sure this is the same half-open index */
788 if (session_handle_index (wrk_handle) != session_handle_index (ho_handle))
791 opaque = session_handle_data (wrk_handle);
794 return app_worker_connect_notify (app_wrk, s, err, opaque);
796 s = session_alloc_for_connection (tc);
797 s->session_state = SESSION_STATE_CONNECTING;
798 s->app_wrk_index = app_wrk->wrk_index;
799 new_si = s->session_index;
800 new_ti = s->thread_index;
802 if ((err = app_worker_init_connected (app_wrk, s)))
805 app_worker_connect_notify (app_wrk, 0, err, opaque);
809 s = session_get (new_si, new_ti);
810 s->session_state = SESSION_STATE_READY;
811 session_lookup_add_connection (tc, session_handle (s));
813 if (app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque))
815 session_lookup_del_connection (tc);
816 /* Avoid notifying app about rejected session cleanup */
817 s = session_get (new_si, new_ti);
818 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
827 session_switch_pool_reply (void *arg)
829 u32 session_index = pointer_to_uword (arg);
830 segment_manager_t *sm;
831 app_worker_t *app_wrk;
834 s = session_get_if_valid (session_index, vlib_get_thread_index ());
838 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
842 /* Attach fifos to the right session and segment slice */
843 sm = app_worker_get_connect_segment_manager (app_wrk);
844 segment_manager_attach_fifo (sm, s->rx_fifo, s);
845 segment_manager_attach_fifo (sm, s->tx_fifo, s);
847 /* Notify app that it has data on the new session */
848 session_enqueue_notify (s);
851 typedef struct _session_switch_pool_args
855 u32 new_thread_index;
856 u32 new_session_index;
857 } session_switch_pool_args_t;
860 * Notify old thread of the session pool switch
863 session_switch_pool (void *cb_args)
865 session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
866 session_handle_t new_sh;
867 segment_manager_t *sm;
868 app_worker_t *app_wrk;
872 ASSERT (args->thread_index == vlib_get_thread_index ());
873 s = session_get (args->session_index, args->thread_index);
875 transport_cleanup (session_get_transport_proto (s), s->connection_index,
878 new_sh = session_make_handle (args->new_session_index,
879 args->new_thread_index);
881 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
884 /* Cleanup fifo segment slice state for fifos */
885 sm = app_worker_get_connect_segment_manager (app_wrk);
886 segment_manager_detach_fifo (sm, s->rx_fifo);
887 segment_manager_detach_fifo (sm, s->tx_fifo);
889 /* Notify app, using old session, about the migration event */
890 app_worker_migrate_notify (app_wrk, s, new_sh);
893 /* Trigger app read and fifo updates on the new thread */
894 rargs = uword_to_pointer (args->new_session_index, void *);
895 session_send_rpc_evt_to_thread (args->new_thread_index,
896 session_switch_pool_reply, rargs);
899 clib_mem_free (cb_args);
903 * Move dgram session to the right thread
906 session_dgram_connect_notify (transport_connection_t * tc,
907 u32 old_thread_index, session_t ** new_session)
910 session_switch_pool_args_t *rpc_args;
913 * Clone half-open session to the right thread.
915 new_s = session_clone_safe (tc->s_index, old_thread_index);
916 new_s->connection_index = tc->c_index;
917 new_s->session_state = SESSION_STATE_READY;
918 new_s->flags |= SESSION_F_IS_MIGRATING;
920 session_lookup_add_connection (tc, session_handle (new_s));
923 * Ask thread owning the old session to clean it up and make us the tx
926 rpc_args = clib_mem_alloc (sizeof (*rpc_args));
927 rpc_args->new_session_index = new_s->session_index;
928 rpc_args->new_thread_index = new_s->thread_index;
929 rpc_args->session_index = tc->s_index;
930 rpc_args->thread_index = old_thread_index;
931 session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool,
934 tc->s_index = new_s->session_index;
935 new_s->connection_index = tc->c_index;
936 *new_session = new_s;
941 * Notification from transport that connection is being closed.
943 * A disconnect is sent to application but state is not removed. Once
944 * disconnect is acknowledged by application, session disconnect is called.
945 * Ultimately this leads to close being called on transport (passive close).
948 session_transport_closing_notify (transport_connection_t * tc)
950 app_worker_t *app_wrk;
953 s = session_get (tc->s_index, tc->thread_index);
954 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
956 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
957 app_wrk = app_worker_get (s->app_wrk_index);
958 app_worker_close_notify (app_wrk, s);
962 * Notification from transport that connection is being deleted
964 * This removes the session if it is still valid. It should be called only on
965 * previously fully established sessions. For instance failed connects should
966 * call stream_session_connect_notify and indicate that the connect has
970 session_transport_delete_notify (transport_connection_t * tc)
974 /* App might've been removed already */
975 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
978 switch (s->session_state)
980 case SESSION_STATE_CREATED:
981 /* Session was created but accept notification was not yet sent to the
982 * app. Cleanup everything. */
983 session_lookup_del_session (s);
984 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
987 case SESSION_STATE_ACCEPTING:
988 case SESSION_STATE_TRANSPORT_CLOSING:
989 case SESSION_STATE_CLOSING:
990 case SESSION_STATE_TRANSPORT_CLOSED:
991 /* If transport finishes or times out before we get a reply
992 * from the app, mark transport as closed and wait for reply
993 * before removing the session. Cleanup session table in advance
994 * because transport will soon be closed and closed sessions
995 * are assumed to have been removed from the lookup table */
996 session_lookup_del_session (s);
997 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
998 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
999 svm_fifo_dequeue_drop_all (s->tx_fifo);
1001 case SESSION_STATE_APP_CLOSED:
1002 /* Cleanup lookup table as transport needs to still be valid.
1003 * Program transport close to ensure that all session events
1004 * have been cleaned up. Once transport close is called, the
1005 * session is just removed because both transport and app have
1006 * confirmed the close*/
1007 session_lookup_del_session (s);
1008 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
1009 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1010 svm_fifo_dequeue_drop_all (s->tx_fifo);
1011 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1013 case SESSION_STATE_TRANSPORT_DELETED:
1015 case SESSION_STATE_CLOSED:
1016 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1020 clib_warning ("session state %u", s->session_state);
1021 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1028 * Notification from transport that it is closed
1030 * Should be called by transport, prior to calling delete notify, once it
1031 * knows that no more data will be exchanged. This could serve as an
1032 * early acknowledgment of an active close especially if transport delete
1033 * can be delayed a long time, e.g., tcp time-wait.
1036 session_transport_closed_notify (transport_connection_t * tc)
1038 app_worker_t *app_wrk;
1041 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
1044 /* Transport thinks that app requested close but it actually didn't.
1045 * Can happen for tcp if fin and rst are received in close succession. */
1046 if (s->session_state == SESSION_STATE_READY)
1048 session_transport_closing_notify (tc);
1049 svm_fifo_dequeue_drop_all (s->tx_fifo);
1050 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
1052 /* If app close has not been received or has not yet resulted in
1053 * a transport close, only mark the session transport as closed */
1054 else if (s->session_state <= SESSION_STATE_CLOSING)
1056 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
1058 /* If app also closed, switch to closed */
1059 else if (s->session_state == SESSION_STATE_APP_CLOSED)
1060 s->session_state = SESSION_STATE_CLOSED;
1062 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1064 app_worker_transport_closed_notify (app_wrk, s);
1068 * Notify application that connection has been reset.
1071 session_transport_reset_notify (transport_connection_t * tc)
1073 app_worker_t *app_wrk;
1076 s = session_get (tc->s_index, tc->thread_index);
1077 svm_fifo_dequeue_drop_all (s->tx_fifo);
1078 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
1080 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
1081 app_wrk = app_worker_get (s->app_wrk_index);
1082 app_worker_reset_notify (app_wrk, s);
1086 session_stream_accept_notify (transport_connection_t * tc)
1088 app_worker_t *app_wrk;
1091 s = session_get (tc->s_index, tc->thread_index);
1092 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1095 s->session_state = SESSION_STATE_ACCEPTING;
1096 if (app_worker_accept_notify (app_wrk, s))
1098 /* On transport delete, no notifications should be sent. Unless, the
1099 * accept is retried and successful. */
1100 s->session_state = SESSION_STATE_CREATED;
1107 * Accept a stream session. Optionally ping the server by callback.
1110 session_stream_accept (transport_connection_t * tc, u32 listener_index,
1111 u32 thread_index, u8 notify)
1116 s = session_alloc_for_connection (tc);
1117 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1118 s->session_state = SESSION_STATE_CREATED;
1120 if ((rv = app_worker_init_accepted (s)))
1126 session_lookup_add_connection (tc, session_handle (s));
1128 /* Shoulder-tap the server */
1131 app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
1132 if ((rv = app_worker_accept_notify (app_wrk, s)))
1134 session_lookup_del_session (s);
1135 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1145 session_dgram_accept (transport_connection_t * tc, u32 listener_index,
1148 app_worker_t *app_wrk;
1152 s = session_alloc_for_connection (tc);
1153 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1155 if ((rv = app_worker_init_accepted (s)))
1161 app_wrk = app_worker_get (s->app_wrk_index);
1162 if ((rv = app_worker_accept_notify (app_wrk, s)))
1164 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1169 s->session_state = SESSION_STATE_READY;
1170 session_lookup_add_connection (tc, session_handle (s));
1176 session_open_cl (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1178 transport_connection_t *tc;
1179 transport_endpoint_cfg_t *tep;
1180 app_worker_t *app_wrk;
1181 session_handle_t sh;
1185 tep = session_endpoint_to_transport_cfg (rmt);
1186 rv = transport_connect (rmt->transport_proto, tep);
1189 SESSION_DBG ("Transport failed to open connection.");
1193 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1195 /* For dgram type of service, allocate session and fifos now */
1196 app_wrk = app_worker_get (app_wrk_index);
1197 s = session_alloc_for_connection (tc);
1198 s->app_wrk_index = app_wrk->wrk_index;
1199 s->session_state = SESSION_STATE_OPENED;
1200 if (app_worker_init_connected (app_wrk, s))
1206 sh = session_handle (s);
1207 session_lookup_add_connection (tc, sh);
1208 return app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque);
1212 session_open_vc (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1214 transport_connection_t *tc;
1215 transport_endpoint_cfg_t *tep;
1216 u64 handle, wrk_handle;
1219 tep = session_endpoint_to_transport_cfg (rmt);
1220 rv = transport_connect (rmt->transport_proto, tep);
1223 SESSION_DBG ("Transport failed to open connection.");
1227 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1229 /* If transport offers a stream service, only allocate session once the
1230 * connection has been established.
1231 * Add connection to half-open table and save app and tc index. The
1232 * latter is needed to help establish the connection while the former
1233 * is needed when the connect notify comes and we have to notify the
1236 handle = session_make_handle (tc->c_index, app_wrk_index);
1237 session_lookup_add_half_open (tc, handle);
1239 /* Store the half-open handle in the connection. Transport will use it
1240 * when cleaning up @ref session_half_open_delete_notify
1242 tc->s_ho_handle = handle;
1244 /* Track the half-open connections in case we want to forcefully
1245 * clean them up @ref session_cleanup_half_open
1247 wrk_handle = session_make_handle (tc->c_index, opaque);
1248 app_worker_add_half_open (app_worker_get (app_wrk_index),
1249 rmt->transport_proto, handle, wrk_handle);
1255 session_open_app (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1257 session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) rmt;
1258 transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (sep);
1260 sep->app_wrk_index = app_wrk_index;
1261 sep->opaque = opaque;
1263 return transport_connect (rmt->transport_proto, tep_cfg);
1266 typedef int (*session_open_service_fn) (u32, session_endpoint_t *, u32);
1269 static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = {
1277 * Ask transport to open connection to remote transport endpoint.
1279 * Stores handle for matching request with reply since the call can be
1280 * asynchronous. For instance, for TCP the 3-way handshake must complete
1281 * before reply comes. Session is only created once connection is established.
1283 * @param app_index Index of the application requesting the connect
1284 * @param st Session type requested.
1285 * @param tep Remote transport endpoint
1286 * @param opaque Opaque data (typically, api_context) the application expects
1287 * on open completion.
1290 session_open (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1292 transport_service_type_t tst;
1293 tst = transport_protocol_service_type (rmt->transport_proto);
1294 return session_open_srv_fns[tst] (app_wrk_index, rmt, opaque);
1298 * Ask transport to listen on session endpoint.
1300 * @param s Session for which listen will be called. Note that unlike
1301 * established sessions, listen sessions are not associated to a
1303 * @param sep Local endpoint to be listened on.
1306 session_listen (session_t * ls, session_endpoint_cfg_t * sep)
1308 transport_endpoint_t *tep;
1312 /* Transport bind/listen */
1313 tep = session_endpoint_to_transport (sep);
1314 s_index = ls->session_index;
1315 tc_index = transport_start_listen (session_get_transport_proto (ls),
1321 /* Attach transport to session. Lookup tables are populated by the app
1322 * worker because local tables (for ct sessions) are not backed by a fib */
1323 ls = listen_session_get (s_index);
1324 ls->connection_index = tc_index;
1330 * Ask transport to stop listening on local transport endpoint.
1332 * @param s Session to stop listening on. It must be in state LISTENING.
1335 session_stop_listen (session_t * s)
1337 transport_proto_t tp = session_get_transport_proto (s);
1338 transport_connection_t *tc;
1340 if (s->session_state != SESSION_STATE_LISTENING)
1341 return SESSION_E_NOLISTEN;
1343 tc = transport_get_listener (tp, s->connection_index);
1345 /* If no transport, assume everything was cleaned up already */
1347 return SESSION_E_NONE;
1349 if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
1350 session_lookup_del_connection (tc);
1352 transport_stop_listen (tp, s->connection_index);
1357 * Initialize session closing procedure.
1359 * Request is always sent to session node to ensure that all outstanding
1360 * requests are served before transport is notified.
1363 session_close (session_t * s)
1368 if (s->session_state >= SESSION_STATE_CLOSING)
1370 /* Session will only be removed once both app and transport
1371 * acknowledge the close */
1372 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED
1373 || s->session_state == SESSION_STATE_TRANSPORT_DELETED)
1374 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1378 s->session_state = SESSION_STATE_CLOSING;
1379 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1383 * Force a close without waiting for data to be flushed
1386 session_reset (session_t * s)
1388 if (s->session_state >= SESSION_STATE_CLOSING)
1390 /* Drop all outstanding tx data */
1391 svm_fifo_dequeue_drop_all (s->tx_fifo);
1392 s->session_state = SESSION_STATE_CLOSING;
1393 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_RESET);
1397 * Notify transport the session can be disconnected. This should eventually
1398 * result in a delete notification that allows us to cleanup session state.
1399 * Called for both active/passive disconnects.
1401 * Must be called from the session's thread.
1404 session_transport_close (session_t * s)
1406 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1408 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1409 s->session_state = SESSION_STATE_CLOSED;
1410 /* If transport is already deleted, just free the session */
1411 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1412 session_free_w_fifos (s);
1416 /* If the tx queue wasn't drained, the transport can continue to try
1417 * sending the outstanding data (in closed state it cannot). It MUST however
1418 * at one point, either after sending everything or after a timeout, call
1419 * delete notify. This will finally lead to the complete cleanup of the
1422 s->session_state = SESSION_STATE_APP_CLOSED;
1424 transport_close (session_get_transport_proto (s), s->connection_index,
1429 * Force transport close
1432 session_transport_reset (session_t * s)
1434 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1436 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1437 s->session_state = SESSION_STATE_CLOSED;
1438 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1439 session_free_w_fifos (s);
1443 s->session_state = SESSION_STATE_APP_CLOSED;
1444 transport_reset (session_get_transport_proto (s), s->connection_index,
1449 * Cleanup transport and session state.
1451 * Notify transport of the cleanup and free the session. This should
1452 * be called only if transport reported some error and is already
1456 session_transport_cleanup (session_t * s)
1458 /* Delete from main lookup table before we axe the the transport */
1459 session_lookup_del_session (s);
1460 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED)
1461 transport_cleanup (session_get_transport_proto (s), s->connection_index,
1463 /* Since we called cleanup, no delete notification will come. So, make
1464 * sure the session is properly freed. */
1465 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1470 * Allocate event queues in the shared-memory segment
1472 * That can either be a newly created memfd segment, that will need to be
1473 * mapped by all stack users, or the binary api's svm region. The latter is
1474 * assumed to be already mapped. NOTE that this assumption DOES NOT hold if
1475 * api clients bootstrap shm api over sockets (i.e. use memfd segments) and
1476 * vpp uses api svm region for event queues.
1479 session_vpp_event_queues_allocate (session_main_t * smm)
1481 u32 evt_q_length = 2048, evt_size = sizeof (session_event_t);
1482 ssvm_private_t *eqs = &smm->evt_qs_segment;
1483 uword eqs_size = 64 << 20;
1484 pid_t vpp_pid = getpid ();
1488 if (smm->configured_event_queue_length)
1489 evt_q_length = smm->configured_event_queue_length;
1491 if (smm->evt_qs_use_memfd_seg)
1493 if (smm->evt_qs_segment_size)
1494 eqs_size = smm->evt_qs_segment_size;
1496 eqs->ssvm_size = eqs_size;
1497 eqs->i_am_master = 1;
1498 eqs->my_pid = vpp_pid;
1499 eqs->name = format (0, "%s%c", "evt-qs-segment", 0);
1500 eqs->requested_va = smm->session_baseva;
1502 if (ssvm_master_init (eqs, SSVM_SEGMENT_MEMFD))
1504 clib_warning ("failed to initialize queue segment");
1509 if (smm->evt_qs_use_memfd_seg)
1510 oldheap = ssvm_push_heap (eqs->sh);
1512 oldheap = vl_msg_push_heap ();
1514 for (i = 0; i < vec_len (smm->wrk); i++)
1516 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
1517 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
1518 {evt_q_length, evt_size, 0}
1520 {evt_q_length >> 1, 256, 0}
1522 cfg->consumer_pid = 0;
1524 cfg->q_nitems = evt_q_length;
1525 cfg->ring_cfgs = rc;
1526 smm->wrk[i].vpp_event_queue = svm_msg_q_alloc (cfg);
1527 if (smm->evt_qs_use_memfd_seg)
1529 if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue))
1530 clib_warning ("eventfd returned");
1534 if (smm->evt_qs_use_memfd_seg)
1535 ssvm_pop_heap (oldheap);
1537 vl_msg_pop_heap (oldheap);
1541 session_main_get_evt_q_segment (void)
1543 session_main_t *smm = &session_main;
1544 if (smm->evt_qs_use_memfd_seg)
1545 return &smm->evt_qs_segment;
1550 session_segment_handle (session_t * s)
1555 return SESSION_INVALID_HANDLE;
1558 return segment_manager_make_segment_handle (f->segment_manager,
1563 static session_fifo_rx_fn *session_tx_fns[TRANSPORT_TX_N_FNS] = {
1564 session_tx_fifo_peek_and_snd,
1565 session_tx_fifo_dequeue_and_snd,
1566 session_tx_fifo_dequeue_internal,
1567 session_tx_fifo_dequeue_and_snd
1572 session_register_transport (transport_proto_t transport_proto,
1573 const transport_proto_vft_t * vft, u8 is_ip4,
1576 session_main_t *smm = &session_main;
1577 session_type_t session_type;
1578 u32 next_index = ~0;
1580 session_type = session_type_from_proto_and_ip (transport_proto, is_ip4);
1582 vec_validate (smm->session_type_to_next, session_type);
1583 vec_validate (smm->session_tx_fns, session_type);
1586 if (output_node != ~0)
1588 foreach_vlib_main (({
1589 next_index = vlib_node_add_next (this_vlib_main,
1590 session_queue_node.index,
1596 smm->session_type_to_next[session_type] = next_index;
1597 smm->session_tx_fns[session_type] =
1598 session_tx_fns[vft->transport_options.tx_type];
1602 session_add_transport_proto (void)
1604 session_main_t *smm = &session_main;
1605 session_worker_t *wrk;
1608 smm->last_transport_proto_type += 1;
1610 for (thread = 0; thread < vec_len (smm->wrk); thread++)
1612 wrk = session_main_get_worker (thread);
1613 vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type);
1616 return smm->last_transport_proto_type;
1619 transport_connection_t *
1620 session_get_transport (session_t * s)
1622 if (s->session_state != SESSION_STATE_LISTENING)
1623 return transport_get_connection (session_get_transport_proto (s),
1624 s->connection_index, s->thread_index);
1626 return transport_get_listener (session_get_transport_proto (s),
1627 s->connection_index);
1631 session_get_endpoint (session_t * s, transport_endpoint_t * tep, u8 is_lcl)
1633 if (s->session_state != SESSION_STATE_LISTENING)
1634 return transport_get_endpoint (session_get_transport_proto (s),
1635 s->connection_index, s->thread_index, tep,
1638 return transport_get_listener_endpoint (session_get_transport_proto (s),
1639 s->connection_index, tep, is_lcl);
1642 transport_connection_t *
1643 listen_session_get_transport (session_t * s)
1645 return transport_get_listener (session_get_transport_proto (s),
1646 s->connection_index);
1650 session_queue_run_on_main_thread (vlib_main_t * vm)
1652 ASSERT (vlib_get_thread_index () == 0);
1653 vlib_process_signal_event_mt (vm, session_queue_process_node.index,
1654 SESSION_Q_PROCESS_RUN_ON_MAIN, 0);
1657 static clib_error_t *
1658 session_manager_main_enable (vlib_main_t * vm)
1660 segment_manager_main_init_args_t _sm_args = { 0 }, *sm_args = &_sm_args;
1661 session_main_t *smm = &session_main;
1662 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1663 u32 num_threads, preallocated_sessions_per_worker;
1664 session_worker_t *wrk;
1667 num_threads = 1 /* main thread */ + vtm->n_threads;
1669 if (num_threads < 1)
1670 return clib_error_return (0, "n_thread_stacks not set");
1672 /* Allocate cache line aligned worker contexts */
1673 vec_validate_aligned (smm->wrk, num_threads - 1, CLIB_CACHE_LINE_BYTES);
1675 for (i = 0; i < num_threads; i++)
1678 wrk->ctrl_head = clib_llist_make_head (wrk->event_elts, evt_list);
1679 wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list);
1680 wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list);
1681 wrk->vm = vlib_mains[i];
1682 wrk->last_vlib_time = vlib_time_now (vm);
1683 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1684 vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type);
1686 if (num_threads > 1)
1687 clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
1690 /* Allocate vpp event queues segment and queue */
1691 session_vpp_event_queues_allocate (smm);
1693 /* Initialize fifo segment main baseva and timeout */
1694 sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size;
1695 sm_args->size = smm->session_va_space_size;
1696 segment_manager_main_init (sm_args);
1698 /* Preallocate sessions */
1699 if (smm->preallocated_sessions)
1701 if (num_threads == 1)
1703 pool_init_fixed (smm->wrk[0].sessions, smm->preallocated_sessions);
1708 preallocated_sessions_per_worker =
1709 (1.1 * (f64) smm->preallocated_sessions /
1710 (f64) (num_threads - 1));
1712 for (j = 1; j < num_threads; j++)
1714 pool_init_fixed (smm->wrk[j].sessions,
1715 preallocated_sessions_per_worker);
1720 session_lookup_init ();
1721 app_namespaces_init ();
1724 smm->is_enabled = 1;
1726 /* Enable transports */
1727 transport_enable_disable (vm, 1);
1728 session_debug_init ();
1734 session_node_enable_disable (u8 is_en)
1736 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
1737 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1738 u8 have_workers = vtm->n_threads != 0;
1741 foreach_vlib_main (({
1742 if (have_workers && ii == 0)
1744 vlib_node_set_state (this_vlib_main, session_queue_process_node.index,
1748 vlib_node_t *n = vlib_get_node (this_vlib_main,
1749 session_queue_process_node.index);
1750 vlib_start_process (this_vlib_main, n->runtime_index);
1754 vlib_process_signal_event_mt (this_vlib_main,
1755 session_queue_process_node.index,
1756 SESSION_Q_PROCESS_STOP, 0);
1761 vlib_node_set_state (this_vlib_main, session_queue_node.index,
1768 vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
1770 clib_error_t *error = 0;
1773 if (session_main.is_enabled)
1776 error = session_manager_main_enable (vm);
1777 session_node_enable_disable (is_en);
1781 session_main.is_enabled = 0;
1782 session_node_enable_disable (is_en);
1789 session_main_init (vlib_main_t * vm)
1791 session_main_t *smm = &session_main;
1793 smm->is_enabled = 0;
1794 smm->session_enable_asap = 0;
1795 smm->session_baseva = HIGH_SEGMENT_BASEVA;
1797 #if (HIGH_SEGMENT_BASEVA > (4ULL << 30))
1798 smm->session_va_space_size = 128ULL << 30;
1799 smm->evt_qs_segment_size = 64 << 20;
1801 smm->session_va_space_size = 128 << 20;
1802 smm->evt_qs_segment_size = 1 << 20;
1805 smm->last_transport_proto_type = TRANSPORT_PROTO_QUIC;
1810 static clib_error_t *
1811 session_main_loop_init (vlib_main_t * vm)
1813 session_main_t *smm = &session_main;
1814 if (smm->session_enable_asap)
1816 vlib_worker_thread_barrier_sync (vm);
1817 vnet_session_enable_disable (vm, 1 /* is_en */ );
1818 vlib_worker_thread_barrier_release (vm);
1823 VLIB_INIT_FUNCTION (session_main_init);
1824 VLIB_MAIN_LOOP_ENTER_FUNCTION (session_main_loop_init);
1826 static clib_error_t *
1827 session_config_fn (vlib_main_t * vm, unformat_input_t * input)
1829 session_main_t *smm = &session_main;
1833 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1835 if (unformat (input, "event-queue-length %d", &nitems))
1838 smm->configured_event_queue_length = nitems;
1840 clib_warning ("event queue length %d too small, ignored", nitems);
1842 else if (unformat (input, "preallocated-sessions %d",
1843 &smm->preallocated_sessions))
1845 else if (unformat (input, "v4-session-table-buckets %d",
1846 &smm->configured_v4_session_table_buckets))
1848 else if (unformat (input, "v4-halfopen-table-buckets %d",
1849 &smm->configured_v4_halfopen_table_buckets))
1851 else if (unformat (input, "v6-session-table-buckets %d",
1852 &smm->configured_v6_session_table_buckets))
1854 else if (unformat (input, "v6-halfopen-table-buckets %d",
1855 &smm->configured_v6_halfopen_table_buckets))
1857 else if (unformat (input, "v4-session-table-memory %U",
1858 unformat_memory_size, &tmp))
1860 if (tmp >= 0x100000000)
1861 return clib_error_return (0, "memory size %llx (%lld) too large",
1863 smm->configured_v4_session_table_memory = tmp;
1865 else if (unformat (input, "v4-halfopen-table-memory %U",
1866 unformat_memory_size, &tmp))
1868 if (tmp >= 0x100000000)
1869 return clib_error_return (0, "memory size %llx (%lld) too large",
1871 smm->configured_v4_halfopen_table_memory = tmp;
1873 else if (unformat (input, "v6-session-table-memory %U",
1874 unformat_memory_size, &tmp))
1876 if (tmp >= 0x100000000)
1877 return clib_error_return (0, "memory size %llx (%lld) too large",
1879 smm->configured_v6_session_table_memory = tmp;
1881 else if (unformat (input, "v6-halfopen-table-memory %U",
1882 unformat_memory_size, &tmp))
1884 if (tmp >= 0x100000000)
1885 return clib_error_return (0, "memory size %llx (%lld) too large",
1887 smm->configured_v6_halfopen_table_memory = tmp;
1889 else if (unformat (input, "local-endpoints-table-memory %U",
1890 unformat_memory_size, &tmp))
1892 if (tmp >= 0x100000000)
1893 return clib_error_return (0, "memory size %llx (%lld) too large",
1895 smm->local_endpoints_table_memory = tmp;
1897 else if (unformat (input, "local-endpoints-table-buckets %d",
1898 &smm->local_endpoints_table_buckets))
1900 else if (unformat (input, "evt_qs_memfd_seg"))
1901 smm->evt_qs_use_memfd_seg = 1;
1902 else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
1903 &smm->evt_qs_segment_size))
1905 else if (unformat (input, "enable"))
1906 smm->session_enable_asap = 1;
1908 return clib_error_return (0, "unknown input `%U'",
1909 format_unformat_error, input);
1914 VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1917 * fd.io coding-style-patch-verification: ON
1920 * eval: (c-set-style "gnu")