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/session_debug.h>
22 #include <vnet/session/application.h>
23 #include <vnet/dpo/load_balance.h>
24 #include <vnet/fib/ip4_fib.h>
26 session_main_t session_main;
29 session_send_evt_to_thread (void *data, void *args, u32 thread_index,
30 session_evt_type_t evt_type)
36 mq = session_main_get_vpp_event_queue (thread_index);
37 if (PREDICT_FALSE (svm_msg_q_lock (mq)))
39 if (PREDICT_FALSE (svm_msg_q_is_full (mq)
40 || svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
42 svm_msg_q_unlock (mq);
47 case SESSION_CTRL_EVT_RPC:
48 msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
49 evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
50 evt->rpc_args.fp = data;
51 evt->rpc_args.arg = args;
53 case SESSION_IO_EVT_RX:
54 case SESSION_IO_EVT_TX:
55 case SESSION_IO_EVT_TX_FLUSH:
56 case SESSION_IO_EVT_BUILTIN_RX:
57 msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
58 evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
59 evt->session_index = *(u32 *) data;
61 case SESSION_IO_EVT_BUILTIN_TX:
62 case SESSION_CTRL_EVT_CLOSE:
63 case SESSION_CTRL_EVT_RESET:
64 msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
65 evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
66 evt->session_handle = session_handle ((session_t *) data);
69 clib_warning ("evt unhandled!");
70 svm_msg_q_unlock (mq);
73 evt->event_type = evt_type;
75 svm_msg_q_add_and_unlock (mq, &msg);
80 session_send_io_evt_to_thread (svm_fifo_t * f, session_evt_type_t evt_type)
82 return session_send_evt_to_thread (&f->master_session_index, 0,
83 f->master_thread_index, evt_type);
87 session_send_io_evt_to_thread_custom (void *data, u32 thread_index,
88 session_evt_type_t evt_type)
90 return session_send_evt_to_thread (data, 0, thread_index, evt_type);
94 session_send_ctrl_evt_to_thread (session_t * s, session_evt_type_t evt_type)
96 /* only events supported are disconnect and reset */
97 ASSERT (evt_type == SESSION_CTRL_EVT_CLOSE
98 || evt_type == SESSION_CTRL_EVT_RESET);
99 return session_send_evt_to_thread (s, 0, s->thread_index, evt_type);
103 session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp,
106 session_send_evt_to_thread (fp, rpc_args, thread_index,
107 SESSION_CTRL_EVT_RPC);
111 session_send_rpc_evt_to_thread (u32 thread_index, void *fp, void *rpc_args)
113 if (thread_index != vlib_get_thread_index ())
114 session_send_rpc_evt_to_thread_force (thread_index, fp, rpc_args);
117 void (*fnp) (void *) = fp;
123 session_add_self_custom_tx_evt (transport_connection_t * tc, u8 has_prio)
127 s = session_get (tc->s_index, tc->thread_index);
128 ASSERT (s->thread_index == vlib_get_thread_index ());
129 ASSERT (s->session_state != SESSION_STATE_TRANSPORT_DELETED);
130 if (!(s->flags & SESSION_F_CUSTOM_TX))
132 s->flags |= SESSION_F_CUSTOM_TX;
133 if (svm_fifo_set_event (s->tx_fifo)
134 || transport_connection_is_descheduled (tc))
136 session_worker_t *wrk;
137 session_evt_elt_t *elt;
138 wrk = session_main_get_worker (tc->thread_index);
140 elt = session_evt_alloc_new (wrk);
142 elt = session_evt_alloc_old (wrk);
143 elt->evt.session_index = tc->s_index;
144 elt->evt.event_type = SESSION_IO_EVT_TX;
145 tc->flags &= ~TRANSPORT_CONNECTION_F_DESCHED;
151 sesssion_reschedule_tx (transport_connection_t * tc)
153 session_worker_t *wrk = session_main_get_worker (tc->thread_index);
154 session_evt_elt_t *elt;
156 ASSERT (tc->thread_index == vlib_get_thread_index ());
158 elt = session_evt_alloc_new (wrk);
159 elt->evt.session_index = tc->s_index;
160 elt->evt.event_type = SESSION_IO_EVT_TX;
164 session_program_transport_ctrl_evt (session_t * s, session_evt_type_t evt)
166 u32 thread_index = vlib_get_thread_index ();
167 session_evt_elt_t *elt;
168 session_worker_t *wrk;
170 /* If we are in the handler thread, or being called with the worker barrier
171 * held, just append a new event to pending disconnects vector. */
172 if (vlib_thread_is_main_w_barrier () || thread_index == s->thread_index)
174 wrk = session_main_get_worker (s->thread_index);
175 elt = session_evt_alloc_ctrl (wrk);
176 clib_memset (&elt->evt, 0, sizeof (session_event_t));
177 elt->evt.session_handle = session_handle (s);
178 elt->evt.event_type = evt;
181 session_send_ctrl_evt_to_thread (s, evt);
185 session_alloc (u32 thread_index)
187 session_worker_t *wrk = &session_main.wrk[thread_index];
190 pool_get_aligned_will_expand (wrk->sessions, will_expand,
191 CLIB_CACHE_LINE_BYTES);
192 /* If we have peekers, let them finish */
193 if (PREDICT_FALSE (will_expand && vlib_num_workers ()))
195 clib_rwlock_writer_lock (&wrk->peekers_rw_locks);
196 pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
197 clib_rwlock_writer_unlock (&wrk->peekers_rw_locks);
201 pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
203 clib_memset (s, 0, sizeof (*s));
204 s->session_index = s - wrk->sessions;
205 s->thread_index = thread_index;
206 s->app_index = APP_INVALID_INDEX;
211 session_free (session_t * s)
215 u8 thread_index = s->thread_index;
216 clib_memset (s, 0xFA, sizeof (*s));
217 pool_put (session_main.wrk[thread_index].sessions, s);
220 SESSION_EVT (SESSION_EVT_FREE, s);
221 pool_put (session_main.wrk[s->thread_index].sessions, s);
225 session_is_valid (u32 si, u8 thread_index)
228 transport_connection_t *tc;
230 s = pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
235 if (s->thread_index != thread_index || s->session_index != si)
238 if (s->session_state == SESSION_STATE_TRANSPORT_DELETED
239 || s->session_state <= SESSION_STATE_LISTENING)
242 tc = session_get_transport (s);
243 if (s->connection_index != tc->c_index
244 || s->thread_index != tc->thread_index || tc->s_index != si)
251 session_cleanup_notify (session_t * s, session_cleanup_ntf_t ntf)
253 app_worker_t *app_wrk;
255 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
258 app_worker_cleanup_notify (app_wrk, s, ntf);
262 session_free_w_fifos (session_t * s)
264 session_cleanup_notify (s, SESSION_CLEANUP_SESSION);
265 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
270 * Cleans up session and lookup table.
272 * Transport connection must still be valid.
275 session_delete (session_t * s)
279 /* Delete from the main lookup table. */
280 if ((rv = session_lookup_del_session (s)))
281 clib_warning ("session %u hash delete rv %d", s->session_index, rv);
283 session_free_w_fifos (s);
287 session_alloc_for_connection (transport_connection_t * tc)
290 u32 thread_index = tc->thread_index;
292 ASSERT (thread_index == vlib_get_thread_index ()
293 || transport_protocol_is_cl (tc->proto));
295 s = session_alloc (thread_index);
296 s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
297 s->session_state = SESSION_STATE_CLOSED;
299 /* Attach transport to session and vice versa */
300 s->connection_index = tc->c_index;
301 tc->s_index = s->session_index;
306 * Discards bytes from buffer chain
308 * It discards n_bytes_to_drop starting at first buffer after chain_b
311 session_enqueue_discard_chain_bytes (vlib_main_t * vm, vlib_buffer_t * b,
312 vlib_buffer_t ** chain_b,
315 vlib_buffer_t *next = *chain_b;
316 u32 to_drop = n_bytes_to_drop;
317 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
318 while (to_drop && (next->flags & VLIB_BUFFER_NEXT_PRESENT))
320 next = vlib_get_buffer (vm, next->next_buffer);
321 if (next->current_length > to_drop)
323 vlib_buffer_advance (next, to_drop);
328 to_drop -= next->current_length;
329 next->current_length = 0;
335 b->total_length_not_including_first_buffer -= n_bytes_to_drop;
339 * Enqueue buffer chain tail
342 session_enqueue_chain_tail (session_t * s, vlib_buffer_t * b,
343 u32 offset, u8 is_in_order)
345 vlib_buffer_t *chain_b;
346 u32 chain_bi, len, diff;
347 vlib_main_t *vm = vlib_get_main ();
352 if (is_in_order && offset)
354 diff = offset - b->current_length;
355 if (diff > b->total_length_not_including_first_buffer)
358 session_enqueue_discard_chain_bytes (vm, b, &chain_b, diff);
359 chain_bi = vlib_get_buffer_index (vm, chain_b);
362 chain_bi = b->next_buffer;
366 chain_b = vlib_get_buffer (vm, chain_bi);
367 data = vlib_buffer_get_current (chain_b);
368 len = chain_b->current_length;
373 rv = svm_fifo_enqueue (s->rx_fifo, len, data);
380 return (rv > 0) ? (written + rv) : written;
386 /* written more than what was left in chain */
387 if (written > b->total_length_not_including_first_buffer)
390 /* drop the bytes that have already been delivered */
391 session_enqueue_discard_chain_bytes (vm, b, &chain_b, rv - len);
396 rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset, len, data);
399 clib_warning ("failed to enqueue multi-buffer seg");
405 while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT)
406 ? chain_b->next_buffer : 0));
415 session_fifo_tuning (session_t * s, svm_fifo_t * f,
416 session_ft_action_t act, u32 len)
418 if (s->flags & SESSION_F_CUSTOM_FIFO_TUNING)
420 app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
421 app_worker_session_fifo_tuning (app_wrk, s, f, act, len);
422 if (CLIB_ASSERT_ENABLE)
424 segment_manager_t *sm;
425 sm = segment_manager_get (f->segment_manager);
426 ASSERT (f->size >= 4096);
427 ASSERT (f->size <= sm->max_fifo_size);
433 * Enqueue data for delivery to session peer. Does not notify peer of enqueue
434 * event but on request can queue notification events for later delivery by
435 * calling stream_server_flush_enqueue_events().
437 * @param tc Transport connection which is to be enqueued data
438 * @param b Buffer to be enqueued
439 * @param offset Offset at which to start enqueueing if out-of-order
440 * @param queue_event Flag to indicate if peer is to be notified or if event
441 * is to be queued. The former is useful when more data is
442 * enqueued and only one event is to be generated.
443 * @param is_in_order Flag to indicate if data is in order
444 * @return Number of bytes enqueued or a negative value if enqueueing failed.
447 session_enqueue_stream_connection (transport_connection_t * tc,
448 vlib_buffer_t * b, u32 offset,
449 u8 queue_event, u8 is_in_order)
452 int enqueued = 0, rv, in_order_off;
454 s = session_get (tc->s_index, tc->thread_index);
458 enqueued = svm_fifo_enqueue (s->rx_fifo,
460 vlib_buffer_get_current (b));
461 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT)
464 in_order_off = enqueued > b->current_length ? enqueued : 0;
465 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
472 rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset,
474 vlib_buffer_get_current (b));
475 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv))
476 session_enqueue_chain_tail (s, b, offset + b->current_length, 0);
477 /* if something was enqueued, report even this as success for ooo
478 * segment handling */
484 /* Queue RX event on this fifo. Eventually these will need to be flushed
485 * by calling stream_server_flush_enqueue_events () */
486 session_worker_t *wrk;
488 wrk = session_main_get_worker (s->thread_index);
489 if (!(s->flags & SESSION_F_RX_EVT))
491 s->flags |= SESSION_F_RX_EVT;
492 vec_add1 (wrk->session_to_enqueue[tc->proto], s->session_index);
495 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0);
502 session_enqueue_dgram_connection (session_t * s,
503 session_dgram_hdr_t * hdr,
504 vlib_buffer_t * b, u8 proto, u8 queue_event)
506 int enqueued = 0, rv, in_order_off;
508 ASSERT (svm_fifo_max_enqueue_prod (s->rx_fifo)
509 >= b->current_length + sizeof (*hdr));
511 svm_fifo_enqueue (s->rx_fifo, sizeof (session_dgram_hdr_t), (u8 *) hdr);
512 enqueued = svm_fifo_enqueue (s->rx_fifo, b->current_length,
513 vlib_buffer_get_current (b));
514 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0))
516 in_order_off = enqueued > b->current_length ? enqueued : 0;
517 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
523 /* Queue RX event on this fifo. Eventually these will need to be flushed
524 * by calling stream_server_flush_enqueue_events () */
525 session_worker_t *wrk;
527 wrk = session_main_get_worker (s->thread_index);
528 if (!(s->flags & SESSION_F_RX_EVT))
530 s->flags |= SESSION_F_RX_EVT;
531 vec_add1 (wrk->session_to_enqueue[proto], s->session_index);
534 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0);
540 session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
541 u32 offset, u32 max_bytes)
543 session_t *s = session_get (tc->s_index, tc->thread_index);
544 return svm_fifo_peek (s->tx_fifo, offset, max_bytes, buffer);
548 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
550 session_t *s = session_get (tc->s_index, tc->thread_index);
553 rv = svm_fifo_dequeue_drop (s->tx_fifo, max_bytes);
554 session_fifo_tuning (s, s->tx_fifo, SESSION_FT_ACTION_DEQUEUED, rv);
556 if (svm_fifo_needs_deq_ntf (s->tx_fifo, max_bytes))
557 session_dequeue_notify (s);
563 session_notify_subscribers (u32 app_index, session_t * s,
564 svm_fifo_t * f, session_evt_type_t evt_type)
566 app_worker_t *app_wrk;
570 app = application_get (app_index);
574 for (i = 0; i < f->n_subscribers; i++)
576 app_wrk = application_get_worker (app, f->subscribers[i]);
579 if (app_worker_lock_and_send_event (app_wrk, s, evt_type))
587 * Notify session peer that new data has been enqueued.
589 * @param s Stream session for which the event is to be generated.
590 * @param lock Flag to indicate if call should lock message queue.
592 * @return 0 on success or negative number if failed to send notification.
595 session_enqueue_notify_inline (session_t * s)
597 app_worker_t *app_wrk;
601 session_index = s->session_index;
602 n_subscribers = svm_fifo_n_subscribers (s->rx_fifo);
604 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
605 if (PREDICT_FALSE (!app_wrk))
607 SESSION_DBG ("invalid s->app_index = %d", s->app_wrk_index);
611 SESSION_EVT (SESSION_EVT_ENQ, s, svm_fifo_max_dequeue_prod (s->rx_fifo));
613 s->flags &= ~SESSION_F_RX_EVT;
614 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
618 if (PREDICT_FALSE (n_subscribers))
620 s = session_get (session_index, vlib_get_thread_index ());
621 return session_notify_subscribers (app_wrk->app_index, s,
622 s->rx_fifo, SESSION_IO_EVT_RX);
629 session_enqueue_notify (session_t * s)
631 return session_enqueue_notify_inline (s);
635 session_enqueue_notify_rpc (void *arg)
637 u32 session_index = pointer_to_uword (arg);
640 s = session_get_if_valid (session_index, vlib_get_thread_index ());
644 session_enqueue_notify (s);
648 * Like session_enqueue_notify, but can be called from a thread that does not
652 session_enqueue_notify_thread (session_handle_t sh)
654 u32 thread_index = session_thread_from_handle (sh);
655 u32 session_index = session_index_from_handle (sh);
658 * Pass session index (u32) as opposed to handle (u64) in case pointers
661 session_send_rpc_evt_to_thread (thread_index,
662 session_enqueue_notify_rpc,
663 uword_to_pointer (session_index, void *));
667 session_dequeue_notify (session_t * s)
669 app_worker_t *app_wrk;
671 svm_fifo_clear_deq_ntf (s->tx_fifo);
673 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
674 if (PREDICT_FALSE (!app_wrk))
677 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
681 if (PREDICT_FALSE (s->tx_fifo->n_subscribers))
682 return session_notify_subscribers (app_wrk->app_index, s,
683 s->tx_fifo, SESSION_IO_EVT_TX);
689 * Flushes queue of sessions that are to be notified of new data
692 * @param thread_index Thread index for which the flush is to be performed.
693 * @return 0 on success or a positive number indicating the number of
694 * failures due to API queue being full.
697 session_main_flush_enqueue_events (u8 transport_proto, u32 thread_index)
699 session_worker_t *wrk = session_main_get_worker (thread_index);
704 indices = wrk->session_to_enqueue[transport_proto];
706 for (i = 0; i < vec_len (indices); i++)
708 s = session_get_if_valid (indices[i], thread_index);
709 if (PREDICT_FALSE (!s))
715 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED,
716 0 /* TODO/not needed */ );
718 if (PREDICT_FALSE (session_enqueue_notify_inline (s)))
722 vec_reset_length (indices);
723 wrk->session_to_enqueue[transport_proto] = indices;
729 session_main_flush_all_enqueue_events (u8 transport_proto)
731 vlib_thread_main_t *vtm = vlib_get_thread_main ();
733 for (i = 0; i < 1 + vtm->n_threads; i++)
734 errors += session_main_flush_enqueue_events (transport_proto, i);
739 session_stream_connect_notify_inline (transport_connection_t * tc,
741 session_state_t opened_state)
743 u32 opaque = 0, new_ti, new_si;
744 app_worker_t *app_wrk;
749 * Find connection handle and cleanup half-open table
751 ho_handle = session_lookup_half_open_handle (tc);
752 if (ho_handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
754 SESSION_DBG ("half-open was removed!");
757 session_lookup_del_half_open (tc);
759 /* Get the app's index from the handle we stored when opening connection
760 * and the opaque (api_context for external apps) from transport session
762 app_wrk = app_worker_get_if_valid (ho_handle >> 32);
766 opaque = tc->s_index;
769 return app_worker_connect_notify (app_wrk, s, err, opaque);
771 s = session_alloc_for_connection (tc);
772 s->session_state = SESSION_STATE_CONNECTING;
773 s->app_wrk_index = app_wrk->wrk_index;
774 new_si = s->session_index;
775 new_ti = s->thread_index;
777 if ((err = app_worker_init_connected (app_wrk, s)))
780 app_worker_connect_notify (app_wrk, 0, err, opaque);
784 s = session_get (new_si, new_ti);
785 s->session_state = opened_state;
786 session_lookup_add_connection (tc, session_handle (s));
788 if (app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque))
790 s = session_get (new_si, new_ti);
791 session_free_w_fifos (s);
799 session_stream_connect_notify (transport_connection_t * tc,
802 return session_stream_connect_notify_inline (tc, err, SESSION_STATE_READY);
806 session_ho_stream_connect_notify (transport_connection_t * tc,
809 return session_stream_connect_notify_inline (tc, err, SESSION_STATE_OPENED);
813 session_switch_pool_reply (void *arg)
815 u32 session_index = pointer_to_uword (arg);
816 segment_manager_t *sm;
817 app_worker_t *app_wrk;
820 s = session_get_if_valid (session_index, vlib_get_thread_index ());
824 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
828 /* Attach fifos to the right session and segment slice */
829 sm = app_worker_get_connect_segment_manager (app_wrk);
830 segment_manager_attach_fifo (sm, s->rx_fifo, s);
831 segment_manager_attach_fifo (sm, s->tx_fifo, s);
833 /* Notify app that it has data on the new session */
834 session_enqueue_notify (s);
837 typedef struct _session_switch_pool_args
841 u32 new_thread_index;
842 u32 new_session_index;
843 } session_switch_pool_args_t;
846 * Notify old thread of the session pool switch
849 session_switch_pool (void *cb_args)
851 session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
852 session_handle_t new_sh;
853 segment_manager_t *sm;
854 app_worker_t *app_wrk;
858 ASSERT (args->thread_index == vlib_get_thread_index ());
859 s = session_get (args->session_index, args->thread_index);
861 transport_cleanup (session_get_transport_proto (s), s->connection_index,
864 new_sh = session_make_handle (args->new_session_index,
865 args->new_thread_index);
867 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
870 /* Cleanup fifo segment slice state for fifos */
871 sm = app_worker_get_connect_segment_manager (app_wrk);
872 segment_manager_detach_fifo (sm, s->rx_fifo);
873 segment_manager_detach_fifo (sm, s->tx_fifo);
875 /* Notify app, using old session, about the migration event */
876 app_worker_migrate_notify (app_wrk, s, new_sh);
879 /* Trigger app read and fifo updates on the new thread */
880 rargs = uword_to_pointer (args->new_session_index, void *);
881 session_send_rpc_evt_to_thread (args->new_thread_index,
882 session_switch_pool_reply, rargs);
885 clib_mem_free (cb_args);
889 * Move dgram session to the right thread
892 session_dgram_connect_notify (transport_connection_t * tc,
893 u32 old_thread_index, session_t ** new_session)
896 session_switch_pool_args_t *rpc_args;
899 * Clone half-open session to the right thread.
901 new_s = session_clone_safe (tc->s_index, old_thread_index);
902 new_s->connection_index = tc->c_index;
903 new_s->session_state = SESSION_STATE_READY;
904 new_s->flags |= SESSION_F_IS_MIGRATING;
906 session_lookup_add_connection (tc, session_handle (new_s));
909 * Ask thread owning the old session to clean it up and make us the tx
912 rpc_args = clib_mem_alloc (sizeof (*rpc_args));
913 rpc_args->new_session_index = new_s->session_index;
914 rpc_args->new_thread_index = new_s->thread_index;
915 rpc_args->session_index = tc->s_index;
916 rpc_args->thread_index = old_thread_index;
917 session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool,
920 tc->s_index = new_s->session_index;
921 new_s->connection_index = tc->c_index;
922 *new_session = new_s;
927 * Notification from transport that connection is being closed.
929 * A disconnect is sent to application but state is not removed. Once
930 * disconnect is acknowledged by application, session disconnect is called.
931 * Ultimately this leads to close being called on transport (passive close).
934 session_transport_closing_notify (transport_connection_t * tc)
936 app_worker_t *app_wrk;
939 s = session_get (tc->s_index, tc->thread_index);
940 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
942 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
943 app_wrk = app_worker_get (s->app_wrk_index);
944 app_worker_close_notify (app_wrk, s);
948 * Notification from transport that connection is being deleted
950 * This removes the session if it is still valid. It should be called only on
951 * previously fully established sessions. For instance failed connects should
952 * call stream_session_connect_notify and indicate that the connect has
956 session_transport_delete_notify (transport_connection_t * tc)
960 /* App might've been removed already */
961 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
964 switch (s->session_state)
966 case SESSION_STATE_CREATED:
967 /* Session was created but accept notification was not yet sent to the
968 * app. Cleanup everything. */
969 session_lookup_del_session (s);
970 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
973 case SESSION_STATE_ACCEPTING:
974 case SESSION_STATE_TRANSPORT_CLOSING:
975 case SESSION_STATE_CLOSING:
976 case SESSION_STATE_TRANSPORT_CLOSED:
977 /* If transport finishes or times out before we get a reply
978 * from the app, mark transport as closed and wait for reply
979 * before removing the session. Cleanup session table in advance
980 * because transport will soon be closed and closed sessions
981 * are assumed to have been removed from the lookup table */
982 session_lookup_del_session (s);
983 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
984 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
985 svm_fifo_dequeue_drop_all (s->tx_fifo);
987 case SESSION_STATE_APP_CLOSED:
988 /* Cleanup lookup table as transport needs to still be valid.
989 * Program transport close to ensure that all session events
990 * have been cleaned up. Once transport close is called, the
991 * session is just removed because both transport and app have
992 * confirmed the close*/
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);
997 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
999 case SESSION_STATE_TRANSPORT_DELETED:
1001 case SESSION_STATE_CLOSED:
1002 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1006 clib_warning ("session state %u", s->session_state);
1007 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
1014 * Notification from transport that it is closed
1016 * Should be called by transport, prior to calling delete notify, once it
1017 * knows that no more data will be exchanged. This could serve as an
1018 * early acknowledgment of an active close especially if transport delete
1019 * can be delayed a long time, e.g., tcp time-wait.
1022 session_transport_closed_notify (transport_connection_t * tc)
1024 app_worker_t *app_wrk;
1027 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
1030 /* Transport thinks that app requested close but it actually didn't.
1031 * Can happen for tcp if fin and rst are received in close succession. */
1032 if (s->session_state == SESSION_STATE_READY)
1034 session_transport_closing_notify (tc);
1035 svm_fifo_dequeue_drop_all (s->tx_fifo);
1036 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
1038 /* If app close has not been received or has not yet resulted in
1039 * a transport close, only mark the session transport as closed */
1040 else if (s->session_state <= SESSION_STATE_CLOSING)
1042 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
1044 /* If app also closed, switch to closed */
1045 else if (s->session_state == SESSION_STATE_APP_CLOSED)
1046 s->session_state = SESSION_STATE_CLOSED;
1048 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1050 app_worker_transport_closed_notify (app_wrk, s);
1054 * Notify application that connection has been reset.
1057 session_transport_reset_notify (transport_connection_t * tc)
1059 app_worker_t *app_wrk;
1062 s = session_get (tc->s_index, tc->thread_index);
1063 svm_fifo_dequeue_drop_all (s->tx_fifo);
1064 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
1066 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
1067 app_wrk = app_worker_get (s->app_wrk_index);
1068 app_worker_reset_notify (app_wrk, s);
1072 session_stream_accept_notify (transport_connection_t * tc)
1074 app_worker_t *app_wrk;
1077 s = session_get (tc->s_index, tc->thread_index);
1078 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1081 s->session_state = SESSION_STATE_ACCEPTING;
1082 if (app_worker_accept_notify (app_wrk, s))
1084 /* On transport delete, no notifications should be sent. Unless, the
1085 * accept is retried and successful. */
1086 s->session_state = SESSION_STATE_CREATED;
1093 * Accept a stream session. Optionally ping the server by callback.
1096 session_stream_accept (transport_connection_t * tc, u32 listener_index,
1097 u32 thread_index, u8 notify)
1102 s = session_alloc_for_connection (tc);
1103 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1104 s->session_state = SESSION_STATE_CREATED;
1106 if ((rv = app_worker_init_accepted (s)))
1112 session_lookup_add_connection (tc, session_handle (s));
1114 /* Shoulder-tap the server */
1117 app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
1118 if ((rv = app_worker_accept_notify (app_wrk, s)))
1120 session_lookup_del_session (s);
1121 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1131 session_dgram_accept (transport_connection_t * tc, u32 listener_index,
1134 app_worker_t *app_wrk;
1138 s = session_alloc_for_connection (tc);
1139 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1141 if ((rv = app_worker_init_accepted (s)))
1147 app_wrk = app_worker_get (s->app_wrk_index);
1148 if ((rv = app_worker_accept_notify (app_wrk, s)))
1150 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1155 s->session_state = SESSION_STATE_READY;
1156 session_lookup_add_connection (tc, session_handle (s));
1162 session_open_cl (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1164 transport_connection_t *tc;
1165 transport_endpoint_cfg_t *tep;
1166 app_worker_t *app_wrk;
1167 session_handle_t sh;
1171 tep = session_endpoint_to_transport_cfg (rmt);
1172 rv = transport_connect (rmt->transport_proto, tep);
1175 SESSION_DBG ("Transport failed to open connection.");
1179 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1181 /* For dgram type of service, allocate session and fifos now */
1182 app_wrk = app_worker_get (app_wrk_index);
1183 s = session_alloc_for_connection (tc);
1184 s->app_wrk_index = app_wrk->wrk_index;
1185 s->session_state = SESSION_STATE_OPENED;
1186 if (app_worker_init_connected (app_wrk, s))
1192 sh = session_handle (s);
1193 session_lookup_add_connection (tc, sh);
1194 return app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque);
1198 session_open_vc (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1200 transport_connection_t *tc;
1201 transport_endpoint_cfg_t *tep;
1205 tep = session_endpoint_to_transport_cfg (rmt);
1206 rv = transport_connect (rmt->transport_proto, tep);
1209 SESSION_DBG ("Transport failed to open connection.");
1213 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1215 /* If transport offers a stream service, only allocate session once the
1216 * connection has been established.
1217 * Add connection to half-open table and save app and tc index. The
1218 * latter is needed to help establish the connection while the former
1219 * is needed when the connect notify comes and we have to notify the
1222 handle = (((u64) app_wrk_index) << 32) | (u64) tc->c_index;
1223 session_lookup_add_half_open (tc, handle);
1225 /* Store api_context (opaque) for when the reply comes. Not the nicest
1226 * thing but better than allocating a separate half-open pool.
1228 tc->s_index = opaque;
1229 if (transport_half_open_has_fifos (rmt->transport_proto))
1230 return session_ho_stream_connect_notify (tc, 0 /* is_fail */ );
1235 session_open_app (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1237 session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) rmt;
1238 transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (sep);
1240 sep->app_wrk_index = app_wrk_index;
1241 sep->opaque = opaque;
1243 return transport_connect (rmt->transport_proto, tep_cfg);
1246 typedef int (*session_open_service_fn) (u32, session_endpoint_t *, u32);
1249 static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = {
1257 * Ask transport to open connection to remote transport endpoint.
1259 * Stores handle for matching request with reply since the call can be
1260 * asynchronous. For instance, for TCP the 3-way handshake must complete
1261 * before reply comes. Session is only created once connection is established.
1263 * @param app_index Index of the application requesting the connect
1264 * @param st Session type requested.
1265 * @param tep Remote transport endpoint
1266 * @param opaque Opaque data (typically, api_context) the application expects
1267 * on open completion.
1270 session_open (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1272 transport_service_type_t tst;
1273 tst = transport_protocol_service_type (rmt->transport_proto);
1274 return session_open_srv_fns[tst] (app_wrk_index, rmt, opaque);
1278 * Ask transport to listen on session endpoint.
1280 * @param s Session for which listen will be called. Note that unlike
1281 * established sessions, listen sessions are not associated to a
1283 * @param sep Local endpoint to be listened on.
1286 session_listen (session_t * ls, session_endpoint_cfg_t * sep)
1288 transport_endpoint_t *tep;
1292 /* Transport bind/listen */
1293 tep = session_endpoint_to_transport (sep);
1294 s_index = ls->session_index;
1295 tc_index = transport_start_listen (session_get_transport_proto (ls),
1301 /* Attach transport to session. Lookup tables are populated by the app
1302 * worker because local tables (for ct sessions) are not backed by a fib */
1303 ls = listen_session_get (s_index);
1304 ls->connection_index = tc_index;
1310 * Ask transport to stop listening on local transport endpoint.
1312 * @param s Session to stop listening on. It must be in state LISTENING.
1315 session_stop_listen (session_t * s)
1317 transport_proto_t tp = session_get_transport_proto (s);
1318 transport_connection_t *tc;
1320 if (s->session_state != SESSION_STATE_LISTENING)
1321 return SESSION_E_NOLISTEN;
1323 tc = transport_get_listener (tp, s->connection_index);
1325 /* If no transport, assume everything was cleaned up already */
1327 return SESSION_E_NONE;
1329 if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
1330 session_lookup_del_connection (tc);
1332 transport_stop_listen (tp, s->connection_index);
1337 * Initialize session closing procedure.
1339 * Request is always sent to session node to ensure that all outstanding
1340 * requests are served before transport is notified.
1343 session_close (session_t * s)
1348 if (s->session_state >= SESSION_STATE_CLOSING)
1350 /* Session will only be removed once both app and transport
1351 * acknowledge the close */
1352 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED
1353 || s->session_state == SESSION_STATE_TRANSPORT_DELETED)
1354 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1358 s->session_state = SESSION_STATE_CLOSING;
1359 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1363 * Force a close without waiting for data to be flushed
1366 session_reset (session_t * s)
1368 if (s->session_state >= SESSION_STATE_CLOSING)
1370 /* Drop all outstanding tx data */
1371 svm_fifo_dequeue_drop_all (s->tx_fifo);
1372 s->session_state = SESSION_STATE_CLOSING;
1373 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_RESET);
1377 * Notify transport the session can be disconnected. This should eventually
1378 * result in a delete notification that allows us to cleanup session state.
1379 * Called for both active/passive disconnects.
1381 * Must be called from the session's thread.
1384 session_transport_close (session_t * s)
1386 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1388 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1389 s->session_state = SESSION_STATE_CLOSED;
1390 /* If transport is already deleted, just free the session */
1391 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1392 session_free_w_fifos (s);
1396 /* If the tx queue wasn't drained, the transport can continue to try
1397 * sending the outstanding data (in closed state it cannot). It MUST however
1398 * at one point, either after sending everything or after a timeout, call
1399 * delete notify. This will finally lead to the complete cleanup of the
1402 s->session_state = SESSION_STATE_APP_CLOSED;
1404 transport_close (session_get_transport_proto (s), s->connection_index,
1409 * Force transport close
1412 session_transport_reset (session_t * s)
1414 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1416 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1417 s->session_state = SESSION_STATE_CLOSED;
1418 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1419 session_free_w_fifos (s);
1423 s->session_state = SESSION_STATE_APP_CLOSED;
1424 transport_reset (session_get_transport_proto (s), s->connection_index,
1429 * Cleanup transport and session state.
1431 * Notify transport of the cleanup and free the session. This should
1432 * be called only if transport reported some error and is already
1436 session_transport_cleanup (session_t * s)
1438 /* Delete from main lookup table before we axe the the transport */
1439 session_lookup_del_session (s);
1440 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED)
1441 transport_cleanup (session_get_transport_proto (s), s->connection_index,
1443 /* Since we called cleanup, no delete notification will come. So, make
1444 * sure the session is properly freed. */
1445 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1450 * Allocate event queues in the shared-memory segment
1452 * That can either be a newly created memfd segment, that will need to be
1453 * mapped by all stack users, or the binary api's svm region. The latter is
1454 * assumed to be already mapped. NOTE that this assumption DOES NOT hold if
1455 * api clients bootstrap shm api over sockets (i.e. use memfd segments) and
1456 * vpp uses api svm region for event queues.
1459 session_vpp_event_queues_allocate (session_main_t * smm)
1461 u32 evt_q_length = 2048, evt_size = sizeof (session_event_t);
1462 ssvm_private_t *eqs = &smm->evt_qs_segment;
1463 uword eqs_size = 64 << 20;
1464 pid_t vpp_pid = getpid ();
1468 if (smm->configured_event_queue_length)
1469 evt_q_length = smm->configured_event_queue_length;
1471 if (smm->evt_qs_use_memfd_seg)
1473 if (smm->evt_qs_segment_size)
1474 eqs_size = smm->evt_qs_segment_size;
1476 eqs->ssvm_size = eqs_size;
1477 eqs->i_am_master = 1;
1478 eqs->my_pid = vpp_pid;
1479 eqs->name = format (0, "%s%c", "evt-qs-segment", 0);
1480 eqs->requested_va = smm->session_baseva;
1482 if (ssvm_master_init (eqs, SSVM_SEGMENT_MEMFD))
1484 clib_warning ("failed to initialize queue segment");
1489 if (smm->evt_qs_use_memfd_seg)
1490 oldheap = ssvm_push_heap (eqs->sh);
1492 oldheap = vl_msg_push_heap ();
1494 for (i = 0; i < vec_len (smm->wrk); i++)
1496 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
1497 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
1498 {evt_q_length, evt_size, 0}
1500 {evt_q_length >> 1, 256, 0}
1502 cfg->consumer_pid = 0;
1504 cfg->q_nitems = evt_q_length;
1505 cfg->ring_cfgs = rc;
1506 smm->wrk[i].vpp_event_queue = svm_msg_q_alloc (cfg);
1507 if (smm->evt_qs_use_memfd_seg)
1509 if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue))
1510 clib_warning ("eventfd returned");
1514 if (smm->evt_qs_use_memfd_seg)
1515 ssvm_pop_heap (oldheap);
1517 vl_msg_pop_heap (oldheap);
1521 session_main_get_evt_q_segment (void)
1523 session_main_t *smm = &session_main;
1524 if (smm->evt_qs_use_memfd_seg)
1525 return &smm->evt_qs_segment;
1530 session_segment_handle (session_t * s)
1535 return SESSION_INVALID_HANDLE;
1538 return segment_manager_make_segment_handle (f->segment_manager,
1543 static session_fifo_rx_fn *session_tx_fns[TRANSPORT_TX_N_FNS] = {
1544 session_tx_fifo_peek_and_snd,
1545 session_tx_fifo_dequeue_and_snd,
1546 session_tx_fifo_dequeue_internal,
1547 session_tx_fifo_dequeue_and_snd
1552 session_register_transport (transport_proto_t transport_proto,
1553 const transport_proto_vft_t * vft, u8 is_ip4,
1556 session_main_t *smm = &session_main;
1557 session_type_t session_type;
1558 u32 next_index = ~0;
1560 session_type = session_type_from_proto_and_ip (transport_proto, is_ip4);
1562 vec_validate (smm->session_type_to_next, session_type);
1563 vec_validate (smm->session_tx_fns, session_type);
1566 if (output_node != ~0)
1568 foreach_vlib_main (({
1569 next_index = vlib_node_add_next (this_vlib_main,
1570 session_queue_node.index,
1576 smm->session_type_to_next[session_type] = next_index;
1577 smm->session_tx_fns[session_type] =
1578 session_tx_fns[vft->transport_options.tx_type];
1582 session_add_transport_proto (void)
1584 session_main_t *smm = &session_main;
1585 session_worker_t *wrk;
1588 smm->last_transport_proto_type += 1;
1590 for (thread = 0; thread < vec_len (smm->wrk); thread++)
1592 wrk = session_main_get_worker (thread);
1593 vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type);
1596 return smm->last_transport_proto_type;
1599 transport_connection_t *
1600 session_get_transport (session_t * s)
1602 if (s->session_state != SESSION_STATE_LISTENING)
1603 return transport_get_connection (session_get_transport_proto (s),
1604 s->connection_index, s->thread_index);
1606 return transport_get_listener (session_get_transport_proto (s),
1607 s->connection_index);
1611 session_get_endpoint (session_t * s, transport_endpoint_t * tep, u8 is_lcl)
1613 if (s->session_state != SESSION_STATE_LISTENING)
1614 return transport_get_endpoint (session_get_transport_proto (s),
1615 s->connection_index, s->thread_index, tep,
1618 return transport_get_listener_endpoint (session_get_transport_proto (s),
1619 s->connection_index, tep, is_lcl);
1622 transport_connection_t *
1623 listen_session_get_transport (session_t * s)
1625 return transport_get_listener (session_get_transport_proto (s),
1626 s->connection_index);
1630 session_queue_run_on_main_thread (vlib_main_t * vm)
1632 ASSERT (vlib_get_thread_index () == 0);
1633 vlib_process_signal_event_mt (vm, session_queue_process_node.index,
1634 SESSION_Q_PROCESS_RUN_ON_MAIN, 0);
1637 static clib_error_t *
1638 session_manager_main_enable (vlib_main_t * vm)
1640 segment_manager_main_init_args_t _sm_args = { 0 }, *sm_args = &_sm_args;
1641 session_main_t *smm = &session_main;
1642 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1643 u32 num_threads, preallocated_sessions_per_worker;
1644 session_worker_t *wrk;
1647 num_threads = 1 /* main thread */ + vtm->n_threads;
1649 if (num_threads < 1)
1650 return clib_error_return (0, "n_thread_stacks not set");
1652 /* Allocate cache line aligned worker contexts */
1653 vec_validate_aligned (smm->wrk, num_threads - 1, CLIB_CACHE_LINE_BYTES);
1655 for (i = 0; i < num_threads; i++)
1658 wrk->ctrl_head = clib_llist_make_head (wrk->event_elts, evt_list);
1659 wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list);
1660 wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list);
1661 wrk->vm = vlib_mains[i];
1662 wrk->last_vlib_time = vlib_time_now (vlib_mains[i]);
1663 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1664 vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type);
1666 if (num_threads > 1)
1667 clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
1670 /* Allocate vpp event queues segment and queue */
1671 session_vpp_event_queues_allocate (smm);
1673 /* Initialize fifo segment main baseva and timeout */
1674 sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size;
1675 sm_args->size = smm->session_va_space_size;
1676 segment_manager_main_init (sm_args);
1678 /* Preallocate sessions */
1679 if (smm->preallocated_sessions)
1681 if (num_threads == 1)
1683 pool_init_fixed (smm->wrk[0].sessions, smm->preallocated_sessions);
1688 preallocated_sessions_per_worker =
1689 (1.1 * (f64) smm->preallocated_sessions /
1690 (f64) (num_threads - 1));
1692 for (j = 1; j < num_threads; j++)
1694 pool_init_fixed (smm->wrk[j].sessions,
1695 preallocated_sessions_per_worker);
1700 session_lookup_init ();
1701 app_namespaces_init ();
1704 smm->is_enabled = 1;
1706 /* Enable transports */
1707 transport_enable_disable (vm, 1);
1712 session_node_enable_disable (u8 is_en)
1714 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
1715 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1716 u8 have_workers = vtm->n_threads != 0;
1719 foreach_vlib_main (({
1720 if (have_workers && ii == 0)
1722 vlib_node_set_state (this_vlib_main, session_queue_process_node.index,
1726 vlib_node_t *n = vlib_get_node (this_vlib_main,
1727 session_queue_process_node.index);
1728 vlib_start_process (this_vlib_main, n->runtime_index);
1732 vlib_process_signal_event_mt (this_vlib_main,
1733 session_queue_process_node.index,
1734 SESSION_Q_PROCESS_STOP, 0);
1739 vlib_node_set_state (this_vlib_main, session_queue_node.index,
1746 vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
1748 clib_error_t *error = 0;
1751 if (session_main.is_enabled)
1754 error = session_manager_main_enable (vm);
1755 session_node_enable_disable (is_en);
1759 session_main.is_enabled = 0;
1760 session_node_enable_disable (is_en);
1767 session_main_init (vlib_main_t * vm)
1769 session_main_t *smm = &session_main;
1771 smm->is_enabled = 0;
1772 smm->session_enable_asap = 0;
1773 smm->session_baseva = HIGH_SEGMENT_BASEVA;
1775 #if (HIGH_SEGMENT_BASEVA > (4ULL << 30))
1776 smm->session_va_space_size = 128ULL << 30;
1777 smm->evt_qs_segment_size = 64 << 20;
1779 smm->session_va_space_size = 128 << 20;
1780 smm->evt_qs_segment_size = 1 << 20;
1783 smm->last_transport_proto_type = TRANSPORT_PROTO_QUIC;
1788 static clib_error_t *
1789 session_main_loop_init (vlib_main_t * vm)
1791 session_main_t *smm = &session_main;
1792 if (smm->session_enable_asap)
1794 vlib_worker_thread_barrier_sync (vm);
1795 vnet_session_enable_disable (vm, 1 /* is_en */ );
1796 vlib_worker_thread_barrier_release (vm);
1801 VLIB_INIT_FUNCTION (session_main_init);
1802 VLIB_MAIN_LOOP_ENTER_FUNCTION (session_main_loop_init);
1804 static clib_error_t *
1805 session_config_fn (vlib_main_t * vm, unformat_input_t * input)
1807 session_main_t *smm = &session_main;
1811 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1813 if (unformat (input, "event-queue-length %d", &nitems))
1816 smm->configured_event_queue_length = nitems;
1818 clib_warning ("event queue length %d too small, ignored", nitems);
1820 else if (unformat (input, "preallocated-sessions %d",
1821 &smm->preallocated_sessions))
1823 else if (unformat (input, "v4-session-table-buckets %d",
1824 &smm->configured_v4_session_table_buckets))
1826 else if (unformat (input, "v4-halfopen-table-buckets %d",
1827 &smm->configured_v4_halfopen_table_buckets))
1829 else if (unformat (input, "v6-session-table-buckets %d",
1830 &smm->configured_v6_session_table_buckets))
1832 else if (unformat (input, "v6-halfopen-table-buckets %d",
1833 &smm->configured_v6_halfopen_table_buckets))
1835 else if (unformat (input, "v4-session-table-memory %U",
1836 unformat_memory_size, &tmp))
1838 if (tmp >= 0x100000000)
1839 return clib_error_return (0, "memory size %llx (%lld) too large",
1841 smm->configured_v4_session_table_memory = tmp;
1843 else if (unformat (input, "v4-halfopen-table-memory %U",
1844 unformat_memory_size, &tmp))
1846 if (tmp >= 0x100000000)
1847 return clib_error_return (0, "memory size %llx (%lld) too large",
1849 smm->configured_v4_halfopen_table_memory = tmp;
1851 else if (unformat (input, "v6-session-table-memory %U",
1852 unformat_memory_size, &tmp))
1854 if (tmp >= 0x100000000)
1855 return clib_error_return (0, "memory size %llx (%lld) too large",
1857 smm->configured_v6_session_table_memory = tmp;
1859 else if (unformat (input, "v6-halfopen-table-memory %U",
1860 unformat_memory_size, &tmp))
1862 if (tmp >= 0x100000000)
1863 return clib_error_return (0, "memory size %llx (%lld) too large",
1865 smm->configured_v6_halfopen_table_memory = tmp;
1867 else if (unformat (input, "local-endpoints-table-memory %U",
1868 unformat_memory_size, &tmp))
1870 if (tmp >= 0x100000000)
1871 return clib_error_return (0, "memory size %llx (%lld) too large",
1873 smm->local_endpoints_table_memory = tmp;
1875 else if (unformat (input, "local-endpoints-table-buckets %d",
1876 &smm->local_endpoints_table_buckets))
1878 else if (unformat (input, "evt_qs_memfd_seg"))
1879 smm->evt_qs_use_memfd_seg = 1;
1880 else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
1881 &smm->evt_qs_segment_size))
1883 else if (unformat (input, "enable"))
1884 smm->session_enable_asap = 1;
1886 return clib_error_return (0, "unknown input `%U'",
1887 format_unformat_error, input);
1892 VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1895 * fd.io coding-style-patch-verification: ON
1898 * eval: (c-set-style "gnu")