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_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))
134 session_worker_t *wrk;
135 session_evt_elt_t *elt;
136 wrk = session_main_get_worker (tc->thread_index);
138 elt = session_evt_alloc_new (wrk);
140 elt = session_evt_alloc_old (wrk);
141 elt->evt.session_index = tc->s_index;
142 elt->evt.event_type = SESSION_IO_EVT_TX;
148 session_program_transport_ctrl_evt (session_t * s, session_evt_type_t evt)
150 u32 thread_index = vlib_get_thread_index ();
151 session_evt_elt_t *elt;
152 session_worker_t *wrk;
154 /* If we are in the handler thread, or being called with the worker barrier
155 * held, just append a new event to pending disconnects vector. */
156 if (vlib_thread_is_main_w_barrier () || thread_index == s->thread_index)
158 wrk = session_main_get_worker (s->thread_index);
159 elt = session_evt_alloc_ctrl (wrk);
160 clib_memset (&elt->evt, 0, sizeof (session_event_t));
161 elt->evt.session_handle = session_handle (s);
162 elt->evt.event_type = evt;
165 session_send_ctrl_evt_to_thread (s, evt);
169 session_alloc (u32 thread_index)
171 session_worker_t *wrk = &session_main.wrk[thread_index];
174 pool_get_aligned_will_expand (wrk->sessions, will_expand,
175 CLIB_CACHE_LINE_BYTES);
176 /* If we have peekers, let them finish */
177 if (PREDICT_FALSE (will_expand && vlib_num_workers ()))
179 clib_rwlock_writer_lock (&wrk->peekers_rw_locks);
180 pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
181 clib_rwlock_writer_unlock (&wrk->peekers_rw_locks);
185 pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
187 clib_memset (s, 0, sizeof (*s));
188 s->session_index = s - wrk->sessions;
189 s->thread_index = thread_index;
190 s->app_index = APP_INVALID_INDEX;
195 session_free (session_t * s)
199 u8 thread_index = s->thread_index;
200 clib_memset (s, 0xFA, sizeof (*s));
201 pool_put (session_main.wrk[thread_index].sessions, s);
204 SESSION_EVT (SESSION_EVT_FREE, s);
205 pool_put (session_main.wrk[s->thread_index].sessions, s);
209 session_is_valid (u32 si, u8 thread_index)
212 transport_connection_t *tc;
214 s = pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
219 if (s->thread_index != thread_index || s->session_index != si)
222 if (s->session_state == SESSION_STATE_TRANSPORT_DELETED
223 || s->session_state <= SESSION_STATE_LISTENING)
226 tc = session_get_transport (s);
227 if (s->connection_index != tc->c_index
228 || s->thread_index != tc->thread_index || tc->s_index != si)
235 session_cleanup_notify (session_t * s, session_cleanup_ntf_t ntf)
237 app_worker_t *app_wrk;
239 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
242 app_worker_cleanup_notify (app_wrk, s, ntf);
246 session_free_w_fifos (session_t * s)
248 session_cleanup_notify (s, SESSION_CLEANUP_SESSION);
249 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
254 * Cleans up session and lookup table.
256 * Transport connection must still be valid.
259 session_delete (session_t * s)
263 /* Delete from the main lookup table. */
264 if ((rv = session_lookup_del_session (s)))
265 clib_warning ("session %u hash delete rv %d", s->session_index, rv);
267 session_free_w_fifos (s);
271 session_alloc_for_connection (transport_connection_t * tc)
274 u32 thread_index = tc->thread_index;
276 ASSERT (thread_index == vlib_get_thread_index ()
277 || transport_protocol_is_cl (tc->proto));
279 s = session_alloc (thread_index);
280 s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
281 s->session_state = SESSION_STATE_CLOSED;
283 /* Attach transport to session and vice versa */
284 s->connection_index = tc->c_index;
285 tc->s_index = s->session_index;
290 * Discards bytes from buffer chain
292 * It discards n_bytes_to_drop starting at first buffer after chain_b
295 session_enqueue_discard_chain_bytes (vlib_main_t * vm, vlib_buffer_t * b,
296 vlib_buffer_t ** chain_b,
299 vlib_buffer_t *next = *chain_b;
300 u32 to_drop = n_bytes_to_drop;
301 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
302 while (to_drop && (next->flags & VLIB_BUFFER_NEXT_PRESENT))
304 next = vlib_get_buffer (vm, next->next_buffer);
305 if (next->current_length > to_drop)
307 vlib_buffer_advance (next, to_drop);
312 to_drop -= next->current_length;
313 next->current_length = 0;
319 b->total_length_not_including_first_buffer -= n_bytes_to_drop;
323 * Enqueue buffer chain tail
326 session_enqueue_chain_tail (session_t * s, vlib_buffer_t * b,
327 u32 offset, u8 is_in_order)
329 vlib_buffer_t *chain_b;
330 u32 chain_bi, len, diff;
331 vlib_main_t *vm = vlib_get_main ();
336 if (is_in_order && offset)
338 diff = offset - b->current_length;
339 if (diff > b->total_length_not_including_first_buffer)
342 session_enqueue_discard_chain_bytes (vm, b, &chain_b, diff);
343 chain_bi = vlib_get_buffer_index (vm, chain_b);
346 chain_bi = b->next_buffer;
350 chain_b = vlib_get_buffer (vm, chain_bi);
351 data = vlib_buffer_get_current (chain_b);
352 len = chain_b->current_length;
357 rv = svm_fifo_enqueue (s->rx_fifo, len, data);
364 return (rv > 0) ? (written + rv) : written;
370 /* written more than what was left in chain */
371 if (written > b->total_length_not_including_first_buffer)
374 /* drop the bytes that have already been delivered */
375 session_enqueue_discard_chain_bytes (vm, b, &chain_b, rv - len);
380 rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset, len, data);
383 clib_warning ("failed to enqueue multi-buffer seg");
389 while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT)
390 ? chain_b->next_buffer : 0));
399 * Enqueue data for delivery to session peer. Does not notify peer of enqueue
400 * event but on request can queue notification events for later delivery by
401 * calling stream_server_flush_enqueue_events().
403 * @param tc Transport connection which is to be enqueued data
404 * @param b Buffer to be enqueued
405 * @param offset Offset at which to start enqueueing if out-of-order
406 * @param queue_event Flag to indicate if peer is to be notified or if event
407 * is to be queued. The former is useful when more data is
408 * enqueued and only one event is to be generated.
409 * @param is_in_order Flag to indicate if data is in order
410 * @return Number of bytes enqueued or a negative value if enqueueing failed.
413 session_enqueue_stream_connection (transport_connection_t * tc,
414 vlib_buffer_t * b, u32 offset,
415 u8 queue_event, u8 is_in_order)
418 int enqueued = 0, rv, in_order_off;
420 s = session_get (tc->s_index, tc->thread_index);
424 enqueued = svm_fifo_enqueue (s->rx_fifo,
426 vlib_buffer_get_current (b));
427 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT)
430 in_order_off = enqueued > b->current_length ? enqueued : 0;
431 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
438 rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset,
440 vlib_buffer_get_current (b));
441 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv))
442 session_enqueue_chain_tail (s, b, offset + b->current_length, 0);
443 /* if something was enqueued, report even this as success for ooo
444 * segment handling */
450 /* Queue RX event on this fifo. Eventually these will need to be flushed
451 * by calling stream_server_flush_enqueue_events () */
452 session_worker_t *wrk;
454 wrk = session_main_get_worker (s->thread_index);
455 if (!(s->flags & SESSION_F_RX_EVT))
457 s->flags |= SESSION_F_RX_EVT;
458 vec_add1 (wrk->session_to_enqueue[tc->proto], s->session_index);
466 session_enqueue_dgram_connection (session_t * s,
467 session_dgram_hdr_t * hdr,
468 vlib_buffer_t * b, u8 proto, u8 queue_event)
470 int enqueued = 0, rv, in_order_off;
472 ASSERT (svm_fifo_max_enqueue_prod (s->rx_fifo)
473 >= b->current_length + sizeof (*hdr));
475 svm_fifo_enqueue (s->rx_fifo, sizeof (session_dgram_hdr_t), (u8 *) hdr);
476 enqueued = svm_fifo_enqueue (s->rx_fifo, b->current_length,
477 vlib_buffer_get_current (b));
478 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0))
480 in_order_off = enqueued > b->current_length ? enqueued : 0;
481 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
487 /* Queue RX event on this fifo. Eventually these will need to be flushed
488 * by calling stream_server_flush_enqueue_events () */
489 session_worker_t *wrk;
491 wrk = session_main_get_worker (s->thread_index);
492 if (!(s->flags & SESSION_F_RX_EVT))
494 s->flags |= SESSION_F_RX_EVT;
495 vec_add1 (wrk->session_to_enqueue[proto], s->session_index);
502 session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
503 u32 offset, u32 max_bytes)
505 session_t *s = session_get (tc->s_index, tc->thread_index);
506 return svm_fifo_peek (s->tx_fifo, offset, max_bytes, buffer);
510 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
512 session_t *s = session_get (tc->s_index, tc->thread_index);
515 rv = svm_fifo_dequeue_drop (s->tx_fifo, max_bytes);
517 if (svm_fifo_needs_deq_ntf (s->tx_fifo, max_bytes))
518 session_dequeue_notify (s);
524 session_notify_subscribers (u32 app_index, session_t * s,
525 svm_fifo_t * f, session_evt_type_t evt_type)
527 app_worker_t *app_wrk;
531 app = application_get (app_index);
535 for (i = 0; i < f->n_subscribers; i++)
537 app_wrk = application_get_worker (app, f->subscribers[i]);
540 if (app_worker_lock_and_send_event (app_wrk, s, evt_type))
548 * Notify session peer that new data has been enqueued.
550 * @param s Stream session for which the event is to be generated.
551 * @param lock Flag to indicate if call should lock message queue.
553 * @return 0 on success or negative number if failed to send notification.
556 session_enqueue_notify_inline (session_t * s)
558 app_worker_t *app_wrk;
562 session_index = s->session_index;
563 n_subscribers = svm_fifo_n_subscribers (s->rx_fifo);
565 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
566 if (PREDICT_FALSE (!app_wrk))
568 SESSION_DBG ("invalid s->app_index = %d", s->app_wrk_index);
572 SESSION_EVT (SESSION_EVT_ENQ, s, svm_fifo_max_dequeue_prod (s->rx_fifo));
574 s->flags &= ~SESSION_F_RX_EVT;
575 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
579 if (PREDICT_FALSE (n_subscribers))
581 s = session_get (session_index, vlib_get_thread_index ());
582 return session_notify_subscribers (app_wrk->app_index, s,
583 s->rx_fifo, SESSION_IO_EVT_RX);
590 session_enqueue_notify (session_t * s)
592 return session_enqueue_notify_inline (s);
596 session_enqueue_notify_rpc (void *arg)
598 u32 session_index = pointer_to_uword (arg);
601 s = session_get_if_valid (session_index, vlib_get_thread_index ());
605 session_enqueue_notify (s);
609 * Like session_enqueue_notify, but can be called from a thread that does not
613 session_enqueue_notify_thread (session_handle_t sh)
615 u32 thread_index = session_thread_from_handle (sh);
616 u32 session_index = session_index_from_handle (sh);
619 * Pass session index (u32) as opposed to handle (u64) in case pointers
622 session_send_rpc_evt_to_thread (thread_index,
623 session_enqueue_notify_rpc,
624 uword_to_pointer (session_index, void *));
628 session_dequeue_notify (session_t * s)
630 app_worker_t *app_wrk;
632 svm_fifo_clear_deq_ntf (s->tx_fifo);
634 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
635 if (PREDICT_FALSE (!app_wrk))
638 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
642 if (PREDICT_FALSE (s->tx_fifo->n_subscribers))
643 return session_notify_subscribers (app_wrk->app_index, s,
644 s->tx_fifo, SESSION_IO_EVT_TX);
650 * Flushes queue of sessions that are to be notified of new data
653 * @param thread_index Thread index for which the flush is to be performed.
654 * @return 0 on success or a positive number indicating the number of
655 * failures due to API queue being full.
658 session_main_flush_enqueue_events (u8 transport_proto, u32 thread_index)
660 session_worker_t *wrk = session_main_get_worker (thread_index);
665 indices = wrk->session_to_enqueue[transport_proto];
667 for (i = 0; i < vec_len (indices); i++)
669 s = session_get_if_valid (indices[i], thread_index);
670 if (PREDICT_FALSE (!s))
676 if (PREDICT_FALSE (session_enqueue_notify_inline (s)))
680 vec_reset_length (indices);
681 wrk->session_to_enqueue[transport_proto] = indices;
687 session_main_flush_all_enqueue_events (u8 transport_proto)
689 vlib_thread_main_t *vtm = vlib_get_thread_main ();
691 for (i = 0; i < 1 + vtm->n_threads; i++)
692 errors += session_main_flush_enqueue_events (transport_proto, i);
697 session_stream_connect_notify_inline (transport_connection_t * tc, u8 is_fail,
698 session_state_t opened_state)
700 u32 opaque = 0, new_ti, new_si;
701 app_worker_t *app_wrk;
706 * Find connection handle and cleanup half-open table
708 ho_handle = session_lookup_half_open_handle (tc);
709 if (ho_handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
711 SESSION_DBG ("half-open was removed!");
714 session_lookup_del_half_open (tc);
716 /* Get the app's index from the handle we stored when opening connection
717 * and the opaque (api_context for external apps) from transport session
719 app_wrk = app_worker_get_if_valid (ho_handle >> 32);
723 opaque = tc->s_index;
726 return app_worker_connect_notify (app_wrk, s, opaque);
728 s = session_alloc_for_connection (tc);
729 s->session_state = SESSION_STATE_CONNECTING;
730 s->app_wrk_index = app_wrk->wrk_index;
731 new_si = s->session_index;
732 new_ti = s->thread_index;
734 if (app_worker_init_connected (app_wrk, s))
737 app_worker_connect_notify (app_wrk, 0, opaque);
741 s = session_get (new_si, new_ti);
742 s->session_state = opened_state;
743 session_lookup_add_connection (tc, session_handle (s));
745 if (app_worker_connect_notify (app_wrk, s, opaque))
747 s = session_get (new_si, new_ti);
748 session_free_w_fifos (s);
756 session_stream_connect_notify (transport_connection_t * tc, u8 is_fail)
758 return session_stream_connect_notify_inline (tc, is_fail,
759 SESSION_STATE_READY);
763 session_ho_stream_connect_notify (transport_connection_t * tc, u8 is_fail)
765 return session_stream_connect_notify_inline (tc, is_fail,
766 SESSION_STATE_OPENED);
769 typedef struct _session_switch_pool_args
773 u32 new_thread_index;
774 u32 new_session_index;
775 } session_switch_pool_args_t;
778 * Notify old thread of the session pool switch
781 session_switch_pool (void *cb_args)
783 session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
784 app_worker_t *app_wrk;
787 ASSERT (args->thread_index == vlib_get_thread_index ());
788 s = session_get (args->session_index, args->thread_index);
789 s->tx_fifo->master_session_index = args->new_session_index;
790 s->tx_fifo->master_thread_index = args->new_thread_index;
791 transport_cleanup (session_get_transport_proto (s), s->connection_index,
794 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
797 session_handle_t new_sh;
798 new_sh = session_make_handle (args->new_session_index,
799 args->new_thread_index);
800 app_worker_migrate_notify (app_wrk, s, new_sh);
802 /* Trigger app read on the new thread */
803 session_enqueue_notify_thread (new_sh);
807 clib_mem_free (cb_args);
811 * Move dgram session to the right thread
814 session_dgram_connect_notify (transport_connection_t * tc,
815 u32 old_thread_index, session_t ** new_session)
818 session_switch_pool_args_t *rpc_args;
821 * Clone half-open session to the right thread.
823 new_s = session_clone_safe (tc->s_index, old_thread_index);
824 new_s->connection_index = tc->c_index;
825 new_s->rx_fifo->master_session_index = new_s->session_index;
826 new_s->rx_fifo->master_thread_index = new_s->thread_index;
827 new_s->session_state = SESSION_STATE_READY;
828 new_s->flags |= SESSION_F_IS_MIGRATING;
829 session_lookup_add_connection (tc, session_handle (new_s));
832 * Ask thread owning the old session to clean it up and make us the tx
835 rpc_args = clib_mem_alloc (sizeof (*rpc_args));
836 rpc_args->new_session_index = new_s->session_index;
837 rpc_args->new_thread_index = new_s->thread_index;
838 rpc_args->session_index = tc->s_index;
839 rpc_args->thread_index = old_thread_index;
840 session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool,
843 tc->s_index = new_s->session_index;
844 new_s->connection_index = tc->c_index;
845 *new_session = new_s;
850 * Notification from transport that connection is being closed.
852 * A disconnect is sent to application but state is not removed. Once
853 * disconnect is acknowledged by application, session disconnect is called.
854 * Ultimately this leads to close being called on transport (passive close).
857 session_transport_closing_notify (transport_connection_t * tc)
859 app_worker_t *app_wrk;
862 s = session_get (tc->s_index, tc->thread_index);
863 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
865 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
866 app_wrk = app_worker_get (s->app_wrk_index);
867 app_worker_close_notify (app_wrk, s);
871 * Notification from transport that connection is being deleted
873 * This removes the session if it is still valid. It should be called only on
874 * previously fully established sessions. For instance failed connects should
875 * call stream_session_connect_notify and indicate that the connect has
879 session_transport_delete_notify (transport_connection_t * tc)
883 /* App might've been removed already */
884 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
887 switch (s->session_state)
889 case SESSION_STATE_CREATED:
890 /* Session was created but accept notification was not yet sent to the
891 * app. Cleanup everything. */
892 session_lookup_del_session (s);
893 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
896 case SESSION_STATE_ACCEPTING:
897 case SESSION_STATE_TRANSPORT_CLOSING:
898 case SESSION_STATE_CLOSING:
899 case SESSION_STATE_TRANSPORT_CLOSED:
900 /* If transport finishes or times out before we get a reply
901 * from the app, mark transport as closed and wait for reply
902 * before removing the session. Cleanup session table in advance
903 * because transport will soon be closed and closed sessions
904 * are assumed to have been removed from the lookup table */
905 session_lookup_del_session (s);
906 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
907 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
908 svm_fifo_dequeue_drop_all (s->tx_fifo);
910 case SESSION_STATE_APP_CLOSED:
911 /* Cleanup lookup table as transport needs to still be valid.
912 * Program transport close to ensure that all session events
913 * have been cleaned up. Once transport close is called, the
914 * session is just removed because both transport and app have
915 * confirmed the close*/
916 session_lookup_del_session (s);
917 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
918 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
919 svm_fifo_dequeue_drop_all (s->tx_fifo);
920 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
922 case SESSION_STATE_TRANSPORT_DELETED:
924 case SESSION_STATE_CLOSED:
925 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
929 clib_warning ("session state %u", s->session_state);
930 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
937 * Notification from transport that it is closed
939 * Should be called by transport, prior to calling delete notify, once it
940 * knows that no more data will be exchanged. This could serve as an
941 * early acknowledgment of an active close especially if transport delete
942 * can be delayed a long time, e.g., tcp time-wait.
945 session_transport_closed_notify (transport_connection_t * tc)
947 app_worker_t *app_wrk;
950 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
953 /* Transport thinks that app requested close but it actually didn't.
954 * Can happen for tcp if fin and rst are received in close succession. */
955 if (s->session_state == SESSION_STATE_READY)
957 session_transport_closing_notify (tc);
958 svm_fifo_dequeue_drop_all (s->tx_fifo);
959 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
961 /* If app close has not been received or has not yet resulted in
962 * a transport close, only mark the session transport as closed */
963 else if (s->session_state <= SESSION_STATE_CLOSING)
965 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
967 /* If app also closed, switch to closed */
968 else if (s->session_state == SESSION_STATE_APP_CLOSED)
969 s->session_state = SESSION_STATE_CLOSED;
971 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
973 app_worker_transport_closed_notify (app_wrk, s);
977 * Notify application that connection has been reset.
980 session_transport_reset_notify (transport_connection_t * tc)
982 app_worker_t *app_wrk;
985 s = session_get (tc->s_index, tc->thread_index);
986 svm_fifo_dequeue_drop_all (s->tx_fifo);
987 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
989 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
990 app_wrk = app_worker_get (s->app_wrk_index);
991 app_worker_reset_notify (app_wrk, s);
995 session_stream_accept_notify (transport_connection_t * tc)
997 app_worker_t *app_wrk;
1000 s = session_get (tc->s_index, tc->thread_index);
1001 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1004 s->session_state = SESSION_STATE_ACCEPTING;
1005 return app_worker_accept_notify (app_wrk, s);
1009 * Accept a stream session. Optionally ping the server by callback.
1012 session_stream_accept (transport_connection_t * tc, u32 listener_index,
1013 u32 thread_index, u8 notify)
1018 s = session_alloc_for_connection (tc);
1019 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1020 s->session_state = SESSION_STATE_CREATED;
1022 if ((rv = app_worker_init_accepted (s)))
1025 session_lookup_add_connection (tc, session_handle (s));
1027 /* Shoulder-tap the server */
1030 app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
1031 return app_worker_accept_notify (app_wrk, s);
1038 session_open_cl (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1040 transport_connection_t *tc;
1041 transport_endpoint_cfg_t *tep;
1042 app_worker_t *app_wrk;
1043 session_handle_t sh;
1047 tep = session_endpoint_to_transport_cfg (rmt);
1048 rv = transport_connect (rmt->transport_proto, tep);
1051 SESSION_DBG ("Transport failed to open connection.");
1052 return VNET_API_ERROR_SESSION_CONNECT;
1055 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1057 /* For dgram type of service, allocate session and fifos now */
1058 app_wrk = app_worker_get (app_wrk_index);
1059 s = session_alloc_for_connection (tc);
1060 s->app_wrk_index = app_wrk->wrk_index;
1061 s->session_state = SESSION_STATE_OPENED;
1062 if (app_worker_init_connected (app_wrk, s))
1068 sh = session_handle (s);
1069 session_lookup_add_connection (tc, sh);
1070 return app_worker_connect_notify (app_wrk, s, opaque);
1074 session_open_vc (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1076 transport_connection_t *tc;
1077 transport_endpoint_cfg_t *tep;
1081 tep = session_endpoint_to_transport_cfg (rmt);
1082 rv = transport_connect (rmt->transport_proto, tep);
1085 SESSION_DBG ("Transport failed to open connection.");
1086 return VNET_API_ERROR_SESSION_CONNECT;
1089 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1091 /* If transport offers a stream service, only allocate session once the
1092 * connection has been established.
1093 * Add connection to half-open table and save app and tc index. The
1094 * latter is needed to help establish the connection while the former
1095 * is needed when the connect notify comes and we have to notify the
1098 handle = (((u64) app_wrk_index) << 32) | (u64) tc->c_index;
1099 session_lookup_add_half_open (tc, handle);
1101 /* Store api_context (opaque) for when the reply comes. Not the nicest
1102 * thing but better than allocating a separate half-open pool.
1104 tc->s_index = opaque;
1105 if (transport_half_open_has_fifos (rmt->transport_proto))
1106 return session_ho_stream_connect_notify (tc, 0 /* is_fail */ );
1111 session_open_app (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1113 session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) rmt;
1114 transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (sep);
1116 sep->app_wrk_index = app_wrk_index;
1117 sep->opaque = opaque;
1119 return transport_connect (rmt->transport_proto, tep_cfg);
1122 typedef int (*session_open_service_fn) (u32, session_endpoint_t *, u32);
1125 static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = {
1133 * Ask transport to open connection to remote transport endpoint.
1135 * Stores handle for matching request with reply since the call can be
1136 * asynchronous. For instance, for TCP the 3-way handshake must complete
1137 * before reply comes. Session is only created once connection is established.
1139 * @param app_index Index of the application requesting the connect
1140 * @param st Session type requested.
1141 * @param tep Remote transport endpoint
1142 * @param opaque Opaque data (typically, api_context) the application expects
1143 * on open completion.
1146 session_open (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1148 transport_service_type_t tst;
1149 tst = transport_protocol_service_type (rmt->transport_proto);
1150 return session_open_srv_fns[tst] (app_wrk_index, rmt, opaque);
1154 * Ask transport to listen on session endpoint.
1156 * @param s Session for which listen will be called. Note that unlike
1157 * established sessions, listen sessions are not associated to a
1159 * @param sep Local endpoint to be listened on.
1162 session_listen (session_t * ls, session_endpoint_cfg_t * sep)
1164 transport_endpoint_t *tep;
1165 u32 tc_index, s_index;
1167 /* Transport bind/listen */
1168 tep = session_endpoint_to_transport (sep);
1169 s_index = ls->session_index;
1170 tc_index = transport_start_listen (session_get_transport_proto (ls),
1173 if (tc_index == (u32) ~ 0)
1176 /* Attach transport to session. Lookup tables are populated by the app
1177 * worker because local tables (for ct sessions) are not backed by a fib */
1178 ls = listen_session_get (s_index);
1179 ls->connection_index = tc_index;
1185 * Ask transport to stop listening on local transport endpoint.
1187 * @param s Session to stop listening on. It must be in state LISTENING.
1190 session_stop_listen (session_t * s)
1192 transport_proto_t tp = session_get_transport_proto (s);
1193 transport_connection_t *tc;
1195 if (s->session_state != SESSION_STATE_LISTENING)
1198 tc = transport_get_listener (tp, s->connection_index);
1200 return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
1202 if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
1203 session_lookup_del_connection (tc);
1204 transport_stop_listen (tp, s->connection_index);
1209 * Initialize session closing procedure.
1211 * Request is always sent to session node to ensure that all outstanding
1212 * requests are served before transport is notified.
1215 session_close (session_t * s)
1220 if (s->session_state >= SESSION_STATE_CLOSING)
1222 /* Session will only be removed once both app and transport
1223 * acknowledge the close */
1224 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED
1225 || s->session_state == SESSION_STATE_TRANSPORT_DELETED)
1226 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1230 s->session_state = SESSION_STATE_CLOSING;
1231 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1235 * Force a close without waiting for data to be flushed
1238 session_reset (session_t * s)
1240 if (s->session_state >= SESSION_STATE_CLOSING)
1242 /* Drop all outstanding tx data */
1243 svm_fifo_dequeue_drop_all (s->tx_fifo);
1244 s->session_state = SESSION_STATE_CLOSING;
1245 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_RESET);
1249 * Notify transport the session can be disconnected. This should eventually
1250 * result in a delete notification that allows us to cleanup session state.
1251 * Called for both active/passive disconnects.
1253 * Must be called from the session's thread.
1256 session_transport_close (session_t * s)
1258 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1260 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1261 s->session_state = SESSION_STATE_CLOSED;
1262 /* If transport is already deleted, just free the session */
1263 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1264 session_free_w_fifos (s);
1268 /* If the tx queue wasn't drained, the transport can continue to try
1269 * sending the outstanding data (in closed state it cannot). It MUST however
1270 * at one point, either after sending everything or after a timeout, call
1271 * delete notify. This will finally lead to the complete cleanup of the
1274 s->session_state = SESSION_STATE_APP_CLOSED;
1276 transport_close (session_get_transport_proto (s), s->connection_index,
1281 * Force transport close
1284 session_transport_reset (session_t * s)
1286 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1288 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1289 s->session_state = SESSION_STATE_CLOSED;
1290 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1291 session_free_w_fifos (s);
1295 s->session_state = SESSION_STATE_APP_CLOSED;
1296 transport_reset (session_get_transport_proto (s), s->connection_index,
1301 * Cleanup transport and session state.
1303 * Notify transport of the cleanup and free the session. This should
1304 * be called only if transport reported some error and is already
1308 session_transport_cleanup (session_t * s)
1310 /* Delete from main lookup table before we axe the the transport */
1311 session_lookup_del_session (s);
1312 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED)
1313 transport_cleanup (session_get_transport_proto (s), s->connection_index,
1315 /* Since we called cleanup, no delete notification will come. So, make
1316 * sure the session is properly freed. */
1317 session_free_w_fifos (s);
1321 * Allocate event queues in the shared-memory segment
1323 * That can either be a newly created memfd segment, that will need to be
1324 * mapped by all stack users, or the binary api's svm region. The latter is
1325 * assumed to be already mapped. NOTE that this assumption DOES NOT hold if
1326 * api clients bootstrap shm api over sockets (i.e. use memfd segments) and
1327 * vpp uses api svm region for event queues.
1330 session_vpp_event_queues_allocate (session_main_t * smm)
1332 u32 evt_q_length = 2048, evt_size = sizeof (session_event_t);
1333 ssvm_private_t *eqs = &smm->evt_qs_segment;
1334 api_main_t *am = &api_main;
1335 uword eqs_size = 64 << 20;
1336 pid_t vpp_pid = getpid ();
1340 if (smm->configured_event_queue_length)
1341 evt_q_length = smm->configured_event_queue_length;
1343 if (smm->evt_qs_use_memfd_seg)
1345 if (smm->evt_qs_segment_size)
1346 eqs_size = smm->evt_qs_segment_size;
1348 eqs->ssvm_size = eqs_size;
1349 eqs->i_am_master = 1;
1350 eqs->my_pid = vpp_pid;
1351 eqs->name = format (0, "%s%c", "evt-qs-segment", 0);
1352 eqs->requested_va = smm->session_baseva;
1354 if (ssvm_master_init (eqs, SSVM_SEGMENT_MEMFD))
1356 clib_warning ("failed to initialize queue segment");
1361 if (smm->evt_qs_use_memfd_seg)
1362 oldheap = ssvm_push_heap (eqs->sh);
1364 oldheap = svm_push_data_heap (am->vlib_rp);
1366 for (i = 0; i < vec_len (smm->wrk); i++)
1368 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
1369 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
1370 {evt_q_length, evt_size, 0}
1372 {evt_q_length >> 1, 256, 0}
1374 cfg->consumer_pid = 0;
1376 cfg->q_nitems = evt_q_length;
1377 cfg->ring_cfgs = rc;
1378 smm->wrk[i].vpp_event_queue = svm_msg_q_alloc (cfg);
1379 if (smm->evt_qs_use_memfd_seg)
1381 if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue))
1382 clib_warning ("eventfd returned");
1386 if (smm->evt_qs_use_memfd_seg)
1387 ssvm_pop_heap (oldheap);
1389 svm_pop_heap (oldheap);
1393 session_main_get_evt_q_segment (void)
1395 session_main_t *smm = &session_main;
1396 if (smm->evt_qs_use_memfd_seg)
1397 return &smm->evt_qs_segment;
1402 session_segment_handle (session_t * s)
1407 return SESSION_INVALID_HANDLE;
1410 return segment_manager_make_segment_handle (f->segment_manager,
1415 static session_fifo_rx_fn *session_tx_fns[TRANSPORT_TX_N_FNS] = {
1416 session_tx_fifo_peek_and_snd,
1417 session_tx_fifo_dequeue_and_snd,
1418 session_tx_fifo_dequeue_internal,
1419 session_tx_fifo_dequeue_and_snd
1424 * Initialize session layer for given transport proto and ip version
1426 * Allocates per session type (transport proto + ip version) data structures
1427 * and adds arc from session queue node to session type output node.
1430 session_register_transport (transport_proto_t transport_proto,
1431 const transport_proto_vft_t * vft, u8 is_ip4,
1434 session_main_t *smm = &session_main;
1435 session_type_t session_type;
1436 u32 next_index = ~0;
1438 session_type = session_type_from_proto_and_ip (transport_proto, is_ip4);
1440 vec_validate (smm->session_type_to_next, session_type);
1441 vec_validate (smm->session_tx_fns, session_type);
1444 if (output_node != ~0)
1446 foreach_vlib_main (({
1447 next_index = vlib_node_add_next (this_vlib_main,
1448 session_queue_node.index,
1454 smm->session_type_to_next[session_type] = next_index;
1455 smm->session_tx_fns[session_type] =
1456 session_tx_fns[vft->transport_options.tx_type];
1459 transport_connection_t *
1460 session_get_transport (session_t * s)
1462 if (s->session_state != SESSION_STATE_LISTENING)
1463 return transport_get_connection (session_get_transport_proto (s),
1464 s->connection_index, s->thread_index);
1466 return transport_get_listener (session_get_transport_proto (s),
1467 s->connection_index);
1471 session_get_endpoint (session_t * s, transport_endpoint_t * tep, u8 is_lcl)
1473 if (s->session_state != SESSION_STATE_LISTENING)
1474 return transport_get_endpoint (session_get_transport_proto (s),
1475 s->connection_index, s->thread_index, tep,
1478 return transport_get_listener_endpoint (session_get_transport_proto (s),
1479 s->connection_index, tep, is_lcl);
1482 transport_connection_t *
1483 listen_session_get_transport (session_t * s)
1485 return transport_get_listener (session_get_transport_proto (s),
1486 s->connection_index);
1490 session_flush_frames_main_thread (vlib_main_t * vm)
1492 ASSERT (vlib_get_thread_index () == 0);
1493 vlib_process_signal_event_mt (vm, session_queue_process_node.index,
1494 SESSION_Q_PROCESS_FLUSH_FRAMES, 0);
1497 static clib_error_t *
1498 session_manager_main_enable (vlib_main_t * vm)
1500 segment_manager_main_init_args_t _sm_args = { 0 }, *sm_args = &_sm_args;
1501 session_main_t *smm = &session_main;
1502 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1503 u32 num_threads, preallocated_sessions_per_worker;
1504 session_worker_t *wrk;
1507 num_threads = 1 /* main thread */ + vtm->n_threads;
1509 if (num_threads < 1)
1510 return clib_error_return (0, "n_thread_stacks not set");
1512 /* Allocate cache line aligned worker contexts */
1513 vec_validate_aligned (smm->wrk, num_threads - 1, CLIB_CACHE_LINE_BYTES);
1515 for (i = 0; i < num_threads; i++)
1518 wrk->ctrl_head = clib_llist_make_head (wrk->event_elts, evt_list);
1519 wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list);
1520 wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list);
1521 wrk->vm = vlib_mains[i];
1522 wrk->last_vlib_time = vlib_time_now (vlib_mains[i]);
1523 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1525 if (num_threads > 1)
1526 clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
1529 /* Allocate vpp event queues segment and queue */
1530 session_vpp_event_queues_allocate (smm);
1532 /* Initialize fifo segment main baseva and timeout */
1533 sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size;
1534 sm_args->size = smm->session_va_space_size;
1535 segment_manager_main_init (sm_args);
1537 /* Preallocate sessions */
1538 if (smm->preallocated_sessions)
1540 if (num_threads == 1)
1542 pool_init_fixed (smm->wrk[0].sessions, smm->preallocated_sessions);
1547 preallocated_sessions_per_worker =
1548 (1.1 * (f64) smm->preallocated_sessions /
1549 (f64) (num_threads - 1));
1551 for (j = 1; j < num_threads; j++)
1553 pool_init_fixed (smm->wrk[j].sessions,
1554 preallocated_sessions_per_worker);
1559 session_lookup_init ();
1560 app_namespaces_init ();
1563 smm->is_enabled = 1;
1565 /* Enable transports */
1566 transport_enable_disable (vm, 1);
1571 session_node_enable_disable (u8 is_en)
1573 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
1574 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1575 u8 have_workers = vtm->n_threads != 0;
1578 foreach_vlib_main (({
1579 if (have_workers && ii == 0)
1581 vlib_node_set_state (this_vlib_main, session_queue_process_node.index,
1585 vlib_node_t *n = vlib_get_node (this_vlib_main,
1586 session_queue_process_node.index);
1587 vlib_start_process (this_vlib_main, n->runtime_index);
1591 vlib_process_signal_event_mt (this_vlib_main,
1592 session_queue_process_node.index,
1593 SESSION_Q_PROCESS_STOP, 0);
1598 vlib_node_set_state (this_vlib_main, session_queue_node.index,
1605 vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
1607 clib_error_t *error = 0;
1610 if (session_main.is_enabled)
1613 error = session_manager_main_enable (vm);
1614 session_node_enable_disable (is_en);
1618 session_main.is_enabled = 0;
1619 session_node_enable_disable (is_en);
1626 session_manager_main_init (vlib_main_t * vm)
1628 session_main_t *smm = &session_main;
1629 smm->session_baseva = HIGH_SEGMENT_BASEVA;
1630 #if (HIGH_SEGMENT_BASEVA > (4ULL << 30))
1631 smm->session_va_space_size = 128ULL << 30;
1632 smm->evt_qs_segment_size = 64 << 20;
1634 smm->session_va_space_size = 128 << 20;
1635 smm->evt_qs_segment_size = 1 << 20;
1637 smm->is_enabled = 0;
1638 smm->session_enable_asap = 0;
1642 static clib_error_t *
1643 session_main_init (vlib_main_t * vm)
1645 session_main_t *smm = &session_main;
1646 if (smm->session_enable_asap)
1648 vlib_worker_thread_barrier_sync (vm);
1649 vnet_session_enable_disable (vm, 1 /* is_en */ );
1650 vlib_worker_thread_barrier_release (vm);
1655 VLIB_INIT_FUNCTION (session_manager_main_init);
1656 VLIB_MAIN_LOOP_ENTER_FUNCTION (session_main_init);
1658 static clib_error_t *
1659 session_config_fn (vlib_main_t * vm, unformat_input_t * input)
1661 session_main_t *smm = &session_main;
1665 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1667 if (unformat (input, "event-queue-length %d", &nitems))
1670 smm->configured_event_queue_length = nitems;
1672 clib_warning ("event queue length %d too small, ignored", nitems);
1674 else if (unformat (input, "preallocated-sessions %d",
1675 &smm->preallocated_sessions))
1677 else if (unformat (input, "v4-session-table-buckets %d",
1678 &smm->configured_v4_session_table_buckets))
1680 else if (unformat (input, "v4-halfopen-table-buckets %d",
1681 &smm->configured_v4_halfopen_table_buckets))
1683 else if (unformat (input, "v6-session-table-buckets %d",
1684 &smm->configured_v6_session_table_buckets))
1686 else if (unformat (input, "v6-halfopen-table-buckets %d",
1687 &smm->configured_v6_halfopen_table_buckets))
1689 else if (unformat (input, "v4-session-table-memory %U",
1690 unformat_memory_size, &tmp))
1692 if (tmp >= 0x100000000)
1693 return clib_error_return (0, "memory size %llx (%lld) too large",
1695 smm->configured_v4_session_table_memory = tmp;
1697 else if (unformat (input, "v4-halfopen-table-memory %U",
1698 unformat_memory_size, &tmp))
1700 if (tmp >= 0x100000000)
1701 return clib_error_return (0, "memory size %llx (%lld) too large",
1703 smm->configured_v4_halfopen_table_memory = tmp;
1705 else if (unformat (input, "v6-session-table-memory %U",
1706 unformat_memory_size, &tmp))
1708 if (tmp >= 0x100000000)
1709 return clib_error_return (0, "memory size %llx (%lld) too large",
1711 smm->configured_v6_session_table_memory = tmp;
1713 else if (unformat (input, "v6-halfopen-table-memory %U",
1714 unformat_memory_size, &tmp))
1716 if (tmp >= 0x100000000)
1717 return clib_error_return (0, "memory size %llx (%lld) too large",
1719 smm->configured_v6_halfopen_table_memory = tmp;
1721 else if (unformat (input, "local-endpoints-table-memory %U",
1722 unformat_memory_size, &tmp))
1724 if (tmp >= 0x100000000)
1725 return clib_error_return (0, "memory size %llx (%lld) too large",
1727 smm->local_endpoints_table_memory = tmp;
1729 else if (unformat (input, "local-endpoints-table-buckets %d",
1730 &smm->local_endpoints_table_buckets))
1732 else if (unformat (input, "evt_qs_memfd_seg"))
1733 smm->evt_qs_use_memfd_seg = 1;
1734 else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
1735 &smm->evt_qs_segment_size))
1737 else if (unformat (input, "enable"))
1738 smm->session_enable_asap = 1;
1740 return clib_error_return (0, "unknown input `%U'",
1741 format_unformat_error, input);
1746 VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1749 * fd.io coding-style-patch-verification: ON
1752 * eval: (c-set-style "gnu")