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 s = session_get (new_si, new_ti);
816 session_free_w_fifos (s);
824 session_switch_pool_reply (void *arg)
826 u32 session_index = pointer_to_uword (arg);
827 segment_manager_t *sm;
828 app_worker_t *app_wrk;
831 s = session_get_if_valid (session_index, vlib_get_thread_index ());
835 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
839 /* Attach fifos to the right session and segment slice */
840 sm = app_worker_get_connect_segment_manager (app_wrk);
841 segment_manager_attach_fifo (sm, s->rx_fifo, s);
842 segment_manager_attach_fifo (sm, s->tx_fifo, s);
844 /* Notify app that it has data on the new session */
845 session_enqueue_notify (s);
848 typedef struct _session_switch_pool_args
852 u32 new_thread_index;
853 u32 new_session_index;
854 } session_switch_pool_args_t;
857 * Notify old thread of the session pool switch
860 session_switch_pool (void *cb_args)
862 session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
863 session_handle_t new_sh;
864 segment_manager_t *sm;
865 app_worker_t *app_wrk;
869 ASSERT (args->thread_index == vlib_get_thread_index ());
870 s = session_get (args->session_index, args->thread_index);
872 transport_cleanup (session_get_transport_proto (s), s->connection_index,
875 new_sh = session_make_handle (args->new_session_index,
876 args->new_thread_index);
878 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
881 /* Cleanup fifo segment slice state for fifos */
882 sm = app_worker_get_connect_segment_manager (app_wrk);
883 segment_manager_detach_fifo (sm, s->rx_fifo);
884 segment_manager_detach_fifo (sm, s->tx_fifo);
886 /* Notify app, using old session, about the migration event */
887 app_worker_migrate_notify (app_wrk, s, new_sh);
890 /* Trigger app read and fifo updates on the new thread */
891 rargs = uword_to_pointer (args->new_session_index, void *);
892 session_send_rpc_evt_to_thread (args->new_thread_index,
893 session_switch_pool_reply, rargs);
896 clib_mem_free (cb_args);
900 * Move dgram session to the right thread
903 session_dgram_connect_notify (transport_connection_t * tc,
904 u32 old_thread_index, session_t ** new_session)
907 session_switch_pool_args_t *rpc_args;
910 * Clone half-open session to the right thread.
912 new_s = session_clone_safe (tc->s_index, old_thread_index);
913 new_s->connection_index = tc->c_index;
914 new_s->session_state = SESSION_STATE_READY;
915 new_s->flags |= SESSION_F_IS_MIGRATING;
917 session_lookup_add_connection (tc, session_handle (new_s));
920 * Ask thread owning the old session to clean it up and make us the tx
923 rpc_args = clib_mem_alloc (sizeof (*rpc_args));
924 rpc_args->new_session_index = new_s->session_index;
925 rpc_args->new_thread_index = new_s->thread_index;
926 rpc_args->session_index = tc->s_index;
927 rpc_args->thread_index = old_thread_index;
928 session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool,
931 tc->s_index = new_s->session_index;
932 new_s->connection_index = tc->c_index;
933 *new_session = new_s;
938 * Notification from transport that connection is being closed.
940 * A disconnect is sent to application but state is not removed. Once
941 * disconnect is acknowledged by application, session disconnect is called.
942 * Ultimately this leads to close being called on transport (passive close).
945 session_transport_closing_notify (transport_connection_t * tc)
947 app_worker_t *app_wrk;
950 s = session_get (tc->s_index, tc->thread_index);
951 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
953 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
954 app_wrk = app_worker_get (s->app_wrk_index);
955 app_worker_close_notify (app_wrk, s);
959 * Notification from transport that connection is being deleted
961 * This removes the session if it is still valid. It should be called only on
962 * previously fully established sessions. For instance failed connects should
963 * call stream_session_connect_notify and indicate that the connect has
967 session_transport_delete_notify (transport_connection_t * tc)
971 /* App might've been removed already */
972 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
975 switch (s->session_state)
977 case SESSION_STATE_CREATED:
978 /* Session was created but accept notification was not yet sent to the
979 * app. Cleanup everything. */
980 session_lookup_del_session (s);
981 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
984 case SESSION_STATE_ACCEPTING:
985 case SESSION_STATE_TRANSPORT_CLOSING:
986 case SESSION_STATE_CLOSING:
987 case SESSION_STATE_TRANSPORT_CLOSED:
988 /* If transport finishes or times out before we get a reply
989 * from the app, mark transport as closed and wait for reply
990 * before removing the session. Cleanup session table in advance
991 * because transport will soon be closed and closed sessions
992 * are assumed to have been removed from the lookup table */
993 session_lookup_del_session (s);
994 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
995 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
996 svm_fifo_dequeue_drop_all (s->tx_fifo);
998 case SESSION_STATE_APP_CLOSED:
999 /* Cleanup lookup table as transport needs to still be valid.
1000 * Program transport close to ensure that all session events
1001 * have been cleaned up. Once transport close is called, the
1002 * session is just removed because both transport and app have
1003 * confirmed the close*/
1004 session_lookup_del_session (s);
1005 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
1006 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1007 svm_fifo_dequeue_drop_all (s->tx_fifo);
1008 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1010 case SESSION_STATE_TRANSPORT_DELETED:
1012 case SESSION_STATE_CLOSED:
1013 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1017 clib_warning ("session state %u", s->session_state);
1018 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1025 * Notification from transport that it is closed
1027 * Should be called by transport, prior to calling delete notify, once it
1028 * knows that no more data will be exchanged. This could serve as an
1029 * early acknowledgment of an active close especially if transport delete
1030 * can be delayed a long time, e.g., tcp time-wait.
1033 session_transport_closed_notify (transport_connection_t * tc)
1035 app_worker_t *app_wrk;
1038 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
1041 /* Transport thinks that app requested close but it actually didn't.
1042 * Can happen for tcp if fin and rst are received in close succession. */
1043 if (s->session_state == SESSION_STATE_READY)
1045 session_transport_closing_notify (tc);
1046 svm_fifo_dequeue_drop_all (s->tx_fifo);
1047 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
1049 /* If app close has not been received or has not yet resulted in
1050 * a transport close, only mark the session transport as closed */
1051 else if (s->session_state <= SESSION_STATE_CLOSING)
1053 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
1055 /* If app also closed, switch to closed */
1056 else if (s->session_state == SESSION_STATE_APP_CLOSED)
1057 s->session_state = SESSION_STATE_CLOSED;
1059 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1061 app_worker_transport_closed_notify (app_wrk, s);
1065 * Notify application that connection has been reset.
1068 session_transport_reset_notify (transport_connection_t * tc)
1070 app_worker_t *app_wrk;
1073 s = session_get (tc->s_index, tc->thread_index);
1074 svm_fifo_dequeue_drop_all (s->tx_fifo);
1075 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
1077 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
1078 app_wrk = app_worker_get (s->app_wrk_index);
1079 app_worker_reset_notify (app_wrk, s);
1083 session_stream_accept_notify (transport_connection_t * tc)
1085 app_worker_t *app_wrk;
1088 s = session_get (tc->s_index, tc->thread_index);
1089 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1092 s->session_state = SESSION_STATE_ACCEPTING;
1093 if (app_worker_accept_notify (app_wrk, s))
1095 /* On transport delete, no notifications should be sent. Unless, the
1096 * accept is retried and successful. */
1097 s->session_state = SESSION_STATE_CREATED;
1104 * Accept a stream session. Optionally ping the server by callback.
1107 session_stream_accept (transport_connection_t * tc, u32 listener_index,
1108 u32 thread_index, u8 notify)
1113 s = session_alloc_for_connection (tc);
1114 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1115 s->session_state = SESSION_STATE_CREATED;
1117 if ((rv = app_worker_init_accepted (s)))
1123 session_lookup_add_connection (tc, session_handle (s));
1125 /* Shoulder-tap the server */
1128 app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
1129 if ((rv = app_worker_accept_notify (app_wrk, s)))
1131 session_lookup_del_session (s);
1132 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1142 session_dgram_accept (transport_connection_t * tc, u32 listener_index,
1145 app_worker_t *app_wrk;
1149 s = session_alloc_for_connection (tc);
1150 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1152 if ((rv = app_worker_init_accepted (s)))
1158 app_wrk = app_worker_get (s->app_wrk_index);
1159 if ((rv = app_worker_accept_notify (app_wrk, s)))
1161 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1166 s->session_state = SESSION_STATE_READY;
1167 session_lookup_add_connection (tc, session_handle (s));
1173 session_open_cl (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1175 transport_connection_t *tc;
1176 transport_endpoint_cfg_t *tep;
1177 app_worker_t *app_wrk;
1178 session_handle_t sh;
1182 tep = session_endpoint_to_transport_cfg (rmt);
1183 rv = transport_connect (rmt->transport_proto, tep);
1186 SESSION_DBG ("Transport failed to open connection.");
1190 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1192 /* For dgram type of service, allocate session and fifos now */
1193 app_wrk = app_worker_get (app_wrk_index);
1194 s = session_alloc_for_connection (tc);
1195 s->app_wrk_index = app_wrk->wrk_index;
1196 s->session_state = SESSION_STATE_OPENED;
1197 if (app_worker_init_connected (app_wrk, s))
1203 sh = session_handle (s);
1204 session_lookup_add_connection (tc, sh);
1205 return app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque);
1209 session_open_vc (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1211 transport_connection_t *tc;
1212 transport_endpoint_cfg_t *tep;
1213 u64 handle, wrk_handle;
1216 tep = session_endpoint_to_transport_cfg (rmt);
1217 rv = transport_connect (rmt->transport_proto, tep);
1220 SESSION_DBG ("Transport failed to open connection.");
1224 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1226 /* If transport offers a stream service, only allocate session once the
1227 * connection has been established.
1228 * Add connection to half-open table and save app and tc index. The
1229 * latter is needed to help establish the connection while the former
1230 * is needed when the connect notify comes and we have to notify the
1233 handle = session_make_handle (tc->c_index, app_wrk_index);
1234 session_lookup_add_half_open (tc, handle);
1236 /* Store the half-open handle in the connection. Transport will use it
1237 * when cleaning up @ref session_half_open_delete_notify
1239 tc->s_ho_handle = handle;
1241 /* Track the half-open connections in case we want to forcefully
1242 * clean them up @ref session_cleanup_half_open
1244 wrk_handle = session_make_handle (tc->c_index, opaque);
1245 app_worker_add_half_open (app_worker_get (app_wrk_index),
1246 rmt->transport_proto, handle, wrk_handle);
1252 session_open_app (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1254 session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) rmt;
1255 transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (sep);
1257 sep->app_wrk_index = app_wrk_index;
1258 sep->opaque = opaque;
1260 return transport_connect (rmt->transport_proto, tep_cfg);
1263 typedef int (*session_open_service_fn) (u32, session_endpoint_t *, u32);
1266 static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = {
1274 * Ask transport to open connection to remote transport endpoint.
1276 * Stores handle for matching request with reply since the call can be
1277 * asynchronous. For instance, for TCP the 3-way handshake must complete
1278 * before reply comes. Session is only created once connection is established.
1280 * @param app_index Index of the application requesting the connect
1281 * @param st Session type requested.
1282 * @param tep Remote transport endpoint
1283 * @param opaque Opaque data (typically, api_context) the application expects
1284 * on open completion.
1287 session_open (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1289 transport_service_type_t tst;
1290 tst = transport_protocol_service_type (rmt->transport_proto);
1291 return session_open_srv_fns[tst] (app_wrk_index, rmt, opaque);
1295 * Ask transport to listen on session endpoint.
1297 * @param s Session for which listen will be called. Note that unlike
1298 * established sessions, listen sessions are not associated to a
1300 * @param sep Local endpoint to be listened on.
1303 session_listen (session_t * ls, session_endpoint_cfg_t * sep)
1305 transport_endpoint_t *tep;
1309 /* Transport bind/listen */
1310 tep = session_endpoint_to_transport (sep);
1311 s_index = ls->session_index;
1312 tc_index = transport_start_listen (session_get_transport_proto (ls),
1318 /* Attach transport to session. Lookup tables are populated by the app
1319 * worker because local tables (for ct sessions) are not backed by a fib */
1320 ls = listen_session_get (s_index);
1321 ls->connection_index = tc_index;
1327 * Ask transport to stop listening on local transport endpoint.
1329 * @param s Session to stop listening on. It must be in state LISTENING.
1332 session_stop_listen (session_t * s)
1334 transport_proto_t tp = session_get_transport_proto (s);
1335 transport_connection_t *tc;
1337 if (s->session_state != SESSION_STATE_LISTENING)
1338 return SESSION_E_NOLISTEN;
1340 tc = transport_get_listener (tp, s->connection_index);
1342 /* If no transport, assume everything was cleaned up already */
1344 return SESSION_E_NONE;
1346 if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
1347 session_lookup_del_connection (tc);
1349 transport_stop_listen (tp, s->connection_index);
1354 * Initialize session closing procedure.
1356 * Request is always sent to session node to ensure that all outstanding
1357 * requests are served before transport is notified.
1360 session_close (session_t * s)
1365 if (s->session_state >= SESSION_STATE_CLOSING)
1367 /* Session will only be removed once both app and transport
1368 * acknowledge the close */
1369 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED
1370 || s->session_state == SESSION_STATE_TRANSPORT_DELETED)
1371 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1375 s->session_state = SESSION_STATE_CLOSING;
1376 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1380 * Force a close without waiting for data to be flushed
1383 session_reset (session_t * s)
1385 if (s->session_state >= SESSION_STATE_CLOSING)
1387 /* Drop all outstanding tx data */
1388 svm_fifo_dequeue_drop_all (s->tx_fifo);
1389 s->session_state = SESSION_STATE_CLOSING;
1390 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_RESET);
1394 * Notify transport the session can be disconnected. This should eventually
1395 * result in a delete notification that allows us to cleanup session state.
1396 * Called for both active/passive disconnects.
1398 * Must be called from the session's thread.
1401 session_transport_close (session_t * s)
1403 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1405 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1406 s->session_state = SESSION_STATE_CLOSED;
1407 /* If transport is already deleted, just free the session */
1408 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1409 session_free_w_fifos (s);
1413 /* If the tx queue wasn't drained, the transport can continue to try
1414 * sending the outstanding data (in closed state it cannot). It MUST however
1415 * at one point, either after sending everything or after a timeout, call
1416 * delete notify. This will finally lead to the complete cleanup of the
1419 s->session_state = SESSION_STATE_APP_CLOSED;
1421 transport_close (session_get_transport_proto (s), s->connection_index,
1426 * Force transport close
1429 session_transport_reset (session_t * s)
1431 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1433 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1434 s->session_state = SESSION_STATE_CLOSED;
1435 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1436 session_free_w_fifos (s);
1440 s->session_state = SESSION_STATE_APP_CLOSED;
1441 transport_reset (session_get_transport_proto (s), s->connection_index,
1446 * Cleanup transport and session state.
1448 * Notify transport of the cleanup and free the session. This should
1449 * be called only if transport reported some error and is already
1453 session_transport_cleanup (session_t * s)
1455 /* Delete from main lookup table before we axe the the transport */
1456 session_lookup_del_session (s);
1457 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED)
1458 transport_cleanup (session_get_transport_proto (s), s->connection_index,
1460 /* Since we called cleanup, no delete notification will come. So, make
1461 * sure the session is properly freed. */
1462 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1467 * Allocate event queues in the shared-memory segment
1469 * That can either be a newly created memfd segment, that will need to be
1470 * mapped by all stack users, or the binary api's svm region. The latter is
1471 * assumed to be already mapped. NOTE that this assumption DOES NOT hold if
1472 * api clients bootstrap shm api over sockets (i.e. use memfd segments) and
1473 * vpp uses api svm region for event queues.
1476 session_vpp_event_queues_allocate (session_main_t * smm)
1478 u32 evt_q_length = 2048, evt_size = sizeof (session_event_t);
1479 ssvm_private_t *eqs = &smm->evt_qs_segment;
1480 uword eqs_size = 64 << 20;
1481 pid_t vpp_pid = getpid ();
1485 if (smm->configured_event_queue_length)
1486 evt_q_length = smm->configured_event_queue_length;
1488 if (smm->evt_qs_use_memfd_seg)
1490 if (smm->evt_qs_segment_size)
1491 eqs_size = smm->evt_qs_segment_size;
1493 eqs->ssvm_size = eqs_size;
1494 eqs->i_am_master = 1;
1495 eqs->my_pid = vpp_pid;
1496 eqs->name = format (0, "%s%c", "evt-qs-segment", 0);
1497 eqs->requested_va = smm->session_baseva;
1499 if (ssvm_master_init (eqs, SSVM_SEGMENT_MEMFD))
1501 clib_warning ("failed to initialize queue segment");
1506 if (smm->evt_qs_use_memfd_seg)
1507 oldheap = ssvm_push_heap (eqs->sh);
1509 oldheap = vl_msg_push_heap ();
1511 for (i = 0; i < vec_len (smm->wrk); i++)
1513 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
1514 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
1515 {evt_q_length, evt_size, 0}
1517 {evt_q_length >> 1, 256, 0}
1519 cfg->consumer_pid = 0;
1521 cfg->q_nitems = evt_q_length;
1522 cfg->ring_cfgs = rc;
1523 smm->wrk[i].vpp_event_queue = svm_msg_q_alloc (cfg);
1524 if (smm->evt_qs_use_memfd_seg)
1526 if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue))
1527 clib_warning ("eventfd returned");
1531 if (smm->evt_qs_use_memfd_seg)
1532 ssvm_pop_heap (oldheap);
1534 vl_msg_pop_heap (oldheap);
1538 session_main_get_evt_q_segment (void)
1540 session_main_t *smm = &session_main;
1541 if (smm->evt_qs_use_memfd_seg)
1542 return &smm->evt_qs_segment;
1547 session_segment_handle (session_t * s)
1552 return SESSION_INVALID_HANDLE;
1555 return segment_manager_make_segment_handle (f->segment_manager,
1560 static session_fifo_rx_fn *session_tx_fns[TRANSPORT_TX_N_FNS] = {
1561 session_tx_fifo_peek_and_snd,
1562 session_tx_fifo_dequeue_and_snd,
1563 session_tx_fifo_dequeue_internal,
1564 session_tx_fifo_dequeue_and_snd
1569 session_register_transport (transport_proto_t transport_proto,
1570 const transport_proto_vft_t * vft, u8 is_ip4,
1573 session_main_t *smm = &session_main;
1574 session_type_t session_type;
1575 u32 next_index = ~0;
1577 session_type = session_type_from_proto_and_ip (transport_proto, is_ip4);
1579 vec_validate (smm->session_type_to_next, session_type);
1580 vec_validate (smm->session_tx_fns, session_type);
1583 if (output_node != ~0)
1585 foreach_vlib_main (({
1586 next_index = vlib_node_add_next (this_vlib_main,
1587 session_queue_node.index,
1593 smm->session_type_to_next[session_type] = next_index;
1594 smm->session_tx_fns[session_type] =
1595 session_tx_fns[vft->transport_options.tx_type];
1599 session_add_transport_proto (void)
1601 session_main_t *smm = &session_main;
1602 session_worker_t *wrk;
1605 smm->last_transport_proto_type += 1;
1607 for (thread = 0; thread < vec_len (smm->wrk); thread++)
1609 wrk = session_main_get_worker (thread);
1610 vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type);
1613 return smm->last_transport_proto_type;
1616 transport_connection_t *
1617 session_get_transport (session_t * s)
1619 if (s->session_state != SESSION_STATE_LISTENING)
1620 return transport_get_connection (session_get_transport_proto (s),
1621 s->connection_index, s->thread_index);
1623 return transport_get_listener (session_get_transport_proto (s),
1624 s->connection_index);
1628 session_get_endpoint (session_t * s, transport_endpoint_t * tep, u8 is_lcl)
1630 if (s->session_state != SESSION_STATE_LISTENING)
1631 return transport_get_endpoint (session_get_transport_proto (s),
1632 s->connection_index, s->thread_index, tep,
1635 return transport_get_listener_endpoint (session_get_transport_proto (s),
1636 s->connection_index, tep, is_lcl);
1639 transport_connection_t *
1640 listen_session_get_transport (session_t * s)
1642 return transport_get_listener (session_get_transport_proto (s),
1643 s->connection_index);
1647 session_queue_run_on_main_thread (vlib_main_t * vm)
1649 ASSERT (vlib_get_thread_index () == 0);
1650 vlib_process_signal_event_mt (vm, session_queue_process_node.index,
1651 SESSION_Q_PROCESS_RUN_ON_MAIN, 0);
1654 static clib_error_t *
1655 session_manager_main_enable (vlib_main_t * vm)
1657 segment_manager_main_init_args_t _sm_args = { 0 }, *sm_args = &_sm_args;
1658 session_main_t *smm = &session_main;
1659 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1660 u32 num_threads, preallocated_sessions_per_worker;
1661 session_worker_t *wrk;
1664 num_threads = 1 /* main thread */ + vtm->n_threads;
1666 if (num_threads < 1)
1667 return clib_error_return (0, "n_thread_stacks not set");
1669 /* Allocate cache line aligned worker contexts */
1670 vec_validate_aligned (smm->wrk, num_threads - 1, CLIB_CACHE_LINE_BYTES);
1672 for (i = 0; i < num_threads; i++)
1675 wrk->ctrl_head = clib_llist_make_head (wrk->event_elts, evt_list);
1676 wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list);
1677 wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list);
1678 wrk->vm = vlib_mains[i];
1679 wrk->last_vlib_time = vlib_time_now (vm);
1680 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1681 vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type);
1683 if (num_threads > 1)
1684 clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
1687 /* Allocate vpp event queues segment and queue */
1688 session_vpp_event_queues_allocate (smm);
1690 /* Initialize fifo segment main baseva and timeout */
1691 sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size;
1692 sm_args->size = smm->session_va_space_size;
1693 segment_manager_main_init (sm_args);
1695 /* Preallocate sessions */
1696 if (smm->preallocated_sessions)
1698 if (num_threads == 1)
1700 pool_init_fixed (smm->wrk[0].sessions, smm->preallocated_sessions);
1705 preallocated_sessions_per_worker =
1706 (1.1 * (f64) smm->preallocated_sessions /
1707 (f64) (num_threads - 1));
1709 for (j = 1; j < num_threads; j++)
1711 pool_init_fixed (smm->wrk[j].sessions,
1712 preallocated_sessions_per_worker);
1717 session_lookup_init ();
1718 app_namespaces_init ();
1721 smm->is_enabled = 1;
1723 /* Enable transports */
1724 transport_enable_disable (vm, 1);
1725 session_debug_init ();
1731 session_node_enable_disable (u8 is_en)
1733 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
1734 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1735 u8 have_workers = vtm->n_threads != 0;
1738 foreach_vlib_main (({
1739 if (have_workers && ii == 0)
1741 vlib_node_set_state (this_vlib_main, session_queue_process_node.index,
1745 vlib_node_t *n = vlib_get_node (this_vlib_main,
1746 session_queue_process_node.index);
1747 vlib_start_process (this_vlib_main, n->runtime_index);
1751 vlib_process_signal_event_mt (this_vlib_main,
1752 session_queue_process_node.index,
1753 SESSION_Q_PROCESS_STOP, 0);
1758 vlib_node_set_state (this_vlib_main, session_queue_node.index,
1765 vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
1767 clib_error_t *error = 0;
1770 if (session_main.is_enabled)
1773 error = session_manager_main_enable (vm);
1774 session_node_enable_disable (is_en);
1778 session_main.is_enabled = 0;
1779 session_node_enable_disable (is_en);
1786 session_main_init (vlib_main_t * vm)
1788 session_main_t *smm = &session_main;
1790 smm->is_enabled = 0;
1791 smm->session_enable_asap = 0;
1792 smm->session_baseva = HIGH_SEGMENT_BASEVA;
1794 #if (HIGH_SEGMENT_BASEVA > (4ULL << 30))
1795 smm->session_va_space_size = 128ULL << 30;
1796 smm->evt_qs_segment_size = 64 << 20;
1798 smm->session_va_space_size = 128 << 20;
1799 smm->evt_qs_segment_size = 1 << 20;
1802 smm->last_transport_proto_type = TRANSPORT_PROTO_QUIC;
1807 static clib_error_t *
1808 session_main_loop_init (vlib_main_t * vm)
1810 session_main_t *smm = &session_main;
1811 if (smm->session_enable_asap)
1813 vlib_worker_thread_barrier_sync (vm);
1814 vnet_session_enable_disable (vm, 1 /* is_en */ );
1815 vlib_worker_thread_barrier_release (vm);
1820 VLIB_INIT_FUNCTION (session_main_init);
1821 VLIB_MAIN_LOOP_ENTER_FUNCTION (session_main_loop_init);
1823 static clib_error_t *
1824 session_config_fn (vlib_main_t * vm, unformat_input_t * input)
1826 session_main_t *smm = &session_main;
1830 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1832 if (unformat (input, "event-queue-length %d", &nitems))
1835 smm->configured_event_queue_length = nitems;
1837 clib_warning ("event queue length %d too small, ignored", nitems);
1839 else if (unformat (input, "preallocated-sessions %d",
1840 &smm->preallocated_sessions))
1842 else if (unformat (input, "v4-session-table-buckets %d",
1843 &smm->configured_v4_session_table_buckets))
1845 else if (unformat (input, "v4-halfopen-table-buckets %d",
1846 &smm->configured_v4_halfopen_table_buckets))
1848 else if (unformat (input, "v6-session-table-buckets %d",
1849 &smm->configured_v6_session_table_buckets))
1851 else if (unformat (input, "v6-halfopen-table-buckets %d",
1852 &smm->configured_v6_halfopen_table_buckets))
1854 else if (unformat (input, "v4-session-table-memory %U",
1855 unformat_memory_size, &tmp))
1857 if (tmp >= 0x100000000)
1858 return clib_error_return (0, "memory size %llx (%lld) too large",
1860 smm->configured_v4_session_table_memory = tmp;
1862 else if (unformat (input, "v4-halfopen-table-memory %U",
1863 unformat_memory_size, &tmp))
1865 if (tmp >= 0x100000000)
1866 return clib_error_return (0, "memory size %llx (%lld) too large",
1868 smm->configured_v4_halfopen_table_memory = tmp;
1870 else if (unformat (input, "v6-session-table-memory %U",
1871 unformat_memory_size, &tmp))
1873 if (tmp >= 0x100000000)
1874 return clib_error_return (0, "memory size %llx (%lld) too large",
1876 smm->configured_v6_session_table_memory = tmp;
1878 else if (unformat (input, "v6-halfopen-table-memory %U",
1879 unformat_memory_size, &tmp))
1881 if (tmp >= 0x100000000)
1882 return clib_error_return (0, "memory size %llx (%lld) too large",
1884 smm->configured_v6_halfopen_table_memory = tmp;
1886 else if (unformat (input, "local-endpoints-table-memory %U",
1887 unformat_memory_size, &tmp))
1889 if (tmp >= 0x100000000)
1890 return clib_error_return (0, "memory size %llx (%lld) too large",
1892 smm->local_endpoints_table_memory = tmp;
1894 else if (unformat (input, "local-endpoints-table-buckets %d",
1895 &smm->local_endpoints_table_buckets))
1897 else if (unformat (input, "evt_qs_memfd_seg"))
1898 smm->evt_qs_use_memfd_seg = 1;
1899 else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
1900 &smm->evt_qs_segment_size))
1902 else if (unformat (input, "enable"))
1903 smm->session_enable_asap = 1;
1905 return clib_error_return (0, "unknown input `%U'",
1906 format_unformat_error, input);
1911 VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1914 * fd.io coding-style-patch-verification: ON
1917 * eval: (c-set-style "gnu")