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))
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;
149 session_program_transport_ctrl_evt (session_t * s, session_evt_type_t evt)
151 u32 thread_index = vlib_get_thread_index ();
152 session_evt_elt_t *elt;
153 session_worker_t *wrk;
155 /* If we are in the handler thread, or being called with the worker barrier
156 * held, just append a new event to pending disconnects vector. */
157 if (vlib_thread_is_main_w_barrier () || thread_index == s->thread_index)
159 wrk = session_main_get_worker (s->thread_index);
160 elt = session_evt_alloc_ctrl (wrk);
161 clib_memset (&elt->evt, 0, sizeof (session_event_t));
162 elt->evt.session_handle = session_handle (s);
163 elt->evt.event_type = evt;
166 session_send_ctrl_evt_to_thread (s, evt);
170 session_alloc (u32 thread_index)
172 session_worker_t *wrk = &session_main.wrk[thread_index];
175 pool_get_aligned_will_expand (wrk->sessions, will_expand,
176 CLIB_CACHE_LINE_BYTES);
177 /* If we have peekers, let them finish */
178 if (PREDICT_FALSE (will_expand && vlib_num_workers ()))
180 clib_rwlock_writer_lock (&wrk->peekers_rw_locks);
181 pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
182 clib_rwlock_writer_unlock (&wrk->peekers_rw_locks);
186 pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES);
188 clib_memset (s, 0, sizeof (*s));
189 s->session_index = s - wrk->sessions;
190 s->thread_index = thread_index;
191 s->app_index = APP_INVALID_INDEX;
196 session_free (session_t * s)
200 u8 thread_index = s->thread_index;
201 clib_memset (s, 0xFA, sizeof (*s));
202 pool_put (session_main.wrk[thread_index].sessions, s);
205 SESSION_EVT (SESSION_EVT_FREE, s);
206 pool_put (session_main.wrk[s->thread_index].sessions, s);
210 session_is_valid (u32 si, u8 thread_index)
213 transport_connection_t *tc;
215 s = pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
220 if (s->thread_index != thread_index || s->session_index != si)
223 if (s->session_state == SESSION_STATE_TRANSPORT_DELETED
224 || s->session_state <= SESSION_STATE_LISTENING)
227 tc = session_get_transport (s);
228 if (s->connection_index != tc->c_index
229 || s->thread_index != tc->thread_index || tc->s_index != si)
236 session_cleanup_notify (session_t * s, session_cleanup_ntf_t ntf)
238 app_worker_t *app_wrk;
240 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
243 app_worker_cleanup_notify (app_wrk, s, ntf);
247 session_free_w_fifos (session_t * s)
249 session_cleanup_notify (s, SESSION_CLEANUP_SESSION);
250 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
255 * Cleans up session and lookup table.
257 * Transport connection must still be valid.
260 session_delete (session_t * s)
264 /* Delete from the main lookup table. */
265 if ((rv = session_lookup_del_session (s)))
266 clib_warning ("session %u hash delete rv %d", s->session_index, rv);
268 session_free_w_fifos (s);
272 session_alloc_for_connection (transport_connection_t * tc)
275 u32 thread_index = tc->thread_index;
277 ASSERT (thread_index == vlib_get_thread_index ()
278 || transport_protocol_is_cl (tc->proto));
280 s = session_alloc (thread_index);
281 s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
282 s->session_state = SESSION_STATE_CLOSED;
284 /* Attach transport to session and vice versa */
285 s->connection_index = tc->c_index;
286 tc->s_index = s->session_index;
291 * Discards bytes from buffer chain
293 * It discards n_bytes_to_drop starting at first buffer after chain_b
296 session_enqueue_discard_chain_bytes (vlib_main_t * vm, vlib_buffer_t * b,
297 vlib_buffer_t ** chain_b,
300 vlib_buffer_t *next = *chain_b;
301 u32 to_drop = n_bytes_to_drop;
302 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
303 while (to_drop && (next->flags & VLIB_BUFFER_NEXT_PRESENT))
305 next = vlib_get_buffer (vm, next->next_buffer);
306 if (next->current_length > to_drop)
308 vlib_buffer_advance (next, to_drop);
313 to_drop -= next->current_length;
314 next->current_length = 0;
320 b->total_length_not_including_first_buffer -= n_bytes_to_drop;
324 * Enqueue buffer chain tail
327 session_enqueue_chain_tail (session_t * s, vlib_buffer_t * b,
328 u32 offset, u8 is_in_order)
330 vlib_buffer_t *chain_b;
331 u32 chain_bi, len, diff;
332 vlib_main_t *vm = vlib_get_main ();
337 if (is_in_order && offset)
339 diff = offset - b->current_length;
340 if (diff > b->total_length_not_including_first_buffer)
343 session_enqueue_discard_chain_bytes (vm, b, &chain_b, diff);
344 chain_bi = vlib_get_buffer_index (vm, chain_b);
347 chain_bi = b->next_buffer;
351 chain_b = vlib_get_buffer (vm, chain_bi);
352 data = vlib_buffer_get_current (chain_b);
353 len = chain_b->current_length;
358 rv = svm_fifo_enqueue (s->rx_fifo, len, data);
365 return (rv > 0) ? (written + rv) : written;
371 /* written more than what was left in chain */
372 if (written > b->total_length_not_including_first_buffer)
375 /* drop the bytes that have already been delivered */
376 session_enqueue_discard_chain_bytes (vm, b, &chain_b, rv - len);
381 rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset, len, data);
384 clib_warning ("failed to enqueue multi-buffer seg");
390 while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT)
391 ? chain_b->next_buffer : 0));
400 session_fifo_tuning (session_t * s, svm_fifo_t * f,
401 session_ft_action_t act, u32 len)
403 if (s->flags & SESSION_F_CUSTOM_FIFO_TUNING)
405 app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
406 app_worker_session_fifo_tuning (app_wrk, s, f, act, len);
407 if (CLIB_ASSERT_ENABLE)
409 segment_manager_t *sm;
410 sm = segment_manager_get (f->segment_manager);
411 ASSERT (f->size >= 4096);
412 ASSERT (f->size <= sm->max_fifo_size);
418 * Enqueue data for delivery to session peer. Does not notify peer of enqueue
419 * event but on request can queue notification events for later delivery by
420 * calling stream_server_flush_enqueue_events().
422 * @param tc Transport connection which is to be enqueued data
423 * @param b Buffer to be enqueued
424 * @param offset Offset at which to start enqueueing if out-of-order
425 * @param queue_event Flag to indicate if peer is to be notified or if event
426 * is to be queued. The former is useful when more data is
427 * enqueued and only one event is to be generated.
428 * @param is_in_order Flag to indicate if data is in order
429 * @return Number of bytes enqueued or a negative value if enqueueing failed.
432 session_enqueue_stream_connection (transport_connection_t * tc,
433 vlib_buffer_t * b, u32 offset,
434 u8 queue_event, u8 is_in_order)
437 int enqueued = 0, rv, in_order_off;
439 s = session_get (tc->s_index, tc->thread_index);
443 enqueued = svm_fifo_enqueue (s->rx_fifo,
445 vlib_buffer_get_current (b));
446 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT)
449 in_order_off = enqueued > b->current_length ? enqueued : 0;
450 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
457 rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset,
459 vlib_buffer_get_current (b));
460 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv))
461 session_enqueue_chain_tail (s, b, offset + b->current_length, 0);
462 /* if something was enqueued, report even this as success for ooo
463 * segment handling */
469 /* Queue RX event on this fifo. Eventually these will need to be flushed
470 * by calling stream_server_flush_enqueue_events () */
471 session_worker_t *wrk;
473 wrk = session_main_get_worker (s->thread_index);
474 if (!(s->flags & SESSION_F_RX_EVT))
476 s->flags |= SESSION_F_RX_EVT;
477 vec_add1 (wrk->session_to_enqueue[tc->proto], s->session_index);
480 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0);
487 session_enqueue_dgram_connection (session_t * s,
488 session_dgram_hdr_t * hdr,
489 vlib_buffer_t * b, u8 proto, u8 queue_event)
491 int enqueued = 0, rv, in_order_off;
493 ASSERT (svm_fifo_max_enqueue_prod (s->rx_fifo)
494 >= b->current_length + sizeof (*hdr));
496 svm_fifo_enqueue (s->rx_fifo, sizeof (session_dgram_hdr_t), (u8 *) hdr);
497 enqueued = svm_fifo_enqueue (s->rx_fifo, b->current_length,
498 vlib_buffer_get_current (b));
499 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0))
501 in_order_off = enqueued > b->current_length ? enqueued : 0;
502 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
508 /* Queue RX event on this fifo. Eventually these will need to be flushed
509 * by calling stream_server_flush_enqueue_events () */
510 session_worker_t *wrk;
512 wrk = session_main_get_worker (s->thread_index);
513 if (!(s->flags & SESSION_F_RX_EVT))
515 s->flags |= SESSION_F_RX_EVT;
516 vec_add1 (wrk->session_to_enqueue[proto], s->session_index);
519 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0);
525 session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
526 u32 offset, u32 max_bytes)
528 session_t *s = session_get (tc->s_index, tc->thread_index);
529 return svm_fifo_peek (s->tx_fifo, offset, max_bytes, buffer);
533 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
535 session_t *s = session_get (tc->s_index, tc->thread_index);
538 rv = svm_fifo_dequeue_drop (s->tx_fifo, max_bytes);
539 session_fifo_tuning (s, s->tx_fifo, SESSION_FT_ACTION_DEQUEUED, rv);
541 if (svm_fifo_needs_deq_ntf (s->tx_fifo, max_bytes))
542 session_dequeue_notify (s);
548 session_notify_subscribers (u32 app_index, session_t * s,
549 svm_fifo_t * f, session_evt_type_t evt_type)
551 app_worker_t *app_wrk;
555 app = application_get (app_index);
559 for (i = 0; i < f->n_subscribers; i++)
561 app_wrk = application_get_worker (app, f->subscribers[i]);
564 if (app_worker_lock_and_send_event (app_wrk, s, evt_type))
572 * Notify session peer that new data has been enqueued.
574 * @param s Stream session for which the event is to be generated.
575 * @param lock Flag to indicate if call should lock message queue.
577 * @return 0 on success or negative number if failed to send notification.
580 session_enqueue_notify_inline (session_t * s)
582 app_worker_t *app_wrk;
586 session_index = s->session_index;
587 n_subscribers = svm_fifo_n_subscribers (s->rx_fifo);
589 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
590 if (PREDICT_FALSE (!app_wrk))
592 SESSION_DBG ("invalid s->app_index = %d", s->app_wrk_index);
596 SESSION_EVT (SESSION_EVT_ENQ, s, svm_fifo_max_dequeue_prod (s->rx_fifo));
598 s->flags &= ~SESSION_F_RX_EVT;
599 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
603 if (PREDICT_FALSE (n_subscribers))
605 s = session_get (session_index, vlib_get_thread_index ());
606 return session_notify_subscribers (app_wrk->app_index, s,
607 s->rx_fifo, SESSION_IO_EVT_RX);
614 session_enqueue_notify (session_t * s)
616 return session_enqueue_notify_inline (s);
620 session_enqueue_notify_rpc (void *arg)
622 u32 session_index = pointer_to_uword (arg);
625 s = session_get_if_valid (session_index, vlib_get_thread_index ());
629 session_enqueue_notify (s);
633 * Like session_enqueue_notify, but can be called from a thread that does not
637 session_enqueue_notify_thread (session_handle_t sh)
639 u32 thread_index = session_thread_from_handle (sh);
640 u32 session_index = session_index_from_handle (sh);
643 * Pass session index (u32) as opposed to handle (u64) in case pointers
646 session_send_rpc_evt_to_thread (thread_index,
647 session_enqueue_notify_rpc,
648 uword_to_pointer (session_index, void *));
652 session_dequeue_notify (session_t * s)
654 app_worker_t *app_wrk;
656 svm_fifo_clear_deq_ntf (s->tx_fifo);
658 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
659 if (PREDICT_FALSE (!app_wrk))
662 if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s,
666 if (PREDICT_FALSE (s->tx_fifo->n_subscribers))
667 return session_notify_subscribers (app_wrk->app_index, s,
668 s->tx_fifo, SESSION_IO_EVT_TX);
674 * Flushes queue of sessions that are to be notified of new data
677 * @param thread_index Thread index for which the flush is to be performed.
678 * @return 0 on success or a positive number indicating the number of
679 * failures due to API queue being full.
682 session_main_flush_enqueue_events (u8 transport_proto, u32 thread_index)
684 session_worker_t *wrk = session_main_get_worker (thread_index);
689 indices = wrk->session_to_enqueue[transport_proto];
691 for (i = 0; i < vec_len (indices); i++)
693 s = session_get_if_valid (indices[i], thread_index);
694 if (PREDICT_FALSE (!s))
700 session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED,
701 0 /* TODO/not needed */ );
703 if (PREDICT_FALSE (session_enqueue_notify_inline (s)))
707 vec_reset_length (indices);
708 wrk->session_to_enqueue[transport_proto] = indices;
714 session_main_flush_all_enqueue_events (u8 transport_proto)
716 vlib_thread_main_t *vtm = vlib_get_thread_main ();
718 for (i = 0; i < 1 + vtm->n_threads; i++)
719 errors += session_main_flush_enqueue_events (transport_proto, i);
724 session_stream_connect_notify_inline (transport_connection_t * tc, u8 is_fail,
725 session_state_t opened_state)
727 u32 opaque = 0, new_ti, new_si;
728 app_worker_t *app_wrk;
733 * Find connection handle and cleanup half-open table
735 ho_handle = session_lookup_half_open_handle (tc);
736 if (ho_handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
738 SESSION_DBG ("half-open was removed!");
741 session_lookup_del_half_open (tc);
743 /* Get the app's index from the handle we stored when opening connection
744 * and the opaque (api_context for external apps) from transport session
746 app_wrk = app_worker_get_if_valid (ho_handle >> 32);
750 opaque = tc->s_index;
753 return app_worker_connect_notify (app_wrk, s, opaque);
755 s = session_alloc_for_connection (tc);
756 s->session_state = SESSION_STATE_CONNECTING;
757 s->app_wrk_index = app_wrk->wrk_index;
758 new_si = s->session_index;
759 new_ti = s->thread_index;
761 if (app_worker_init_connected (app_wrk, s))
764 app_worker_connect_notify (app_wrk, 0, opaque);
768 s = session_get (new_si, new_ti);
769 s->session_state = opened_state;
770 session_lookup_add_connection (tc, session_handle (s));
772 if (app_worker_connect_notify (app_wrk, s, opaque))
774 s = session_get (new_si, new_ti);
775 session_free_w_fifos (s);
783 session_stream_connect_notify (transport_connection_t * tc, u8 is_fail)
785 return session_stream_connect_notify_inline (tc, is_fail,
786 SESSION_STATE_READY);
790 session_ho_stream_connect_notify (transport_connection_t * tc, u8 is_fail)
792 return session_stream_connect_notify_inline (tc, is_fail,
793 SESSION_STATE_OPENED);
796 typedef struct _session_switch_pool_args
800 u32 new_thread_index;
801 u32 new_session_index;
802 } session_switch_pool_args_t;
805 * Notify old thread of the session pool switch
808 session_switch_pool (void *cb_args)
810 session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
811 app_worker_t *app_wrk;
814 ASSERT (args->thread_index == vlib_get_thread_index ());
815 s = session_get (args->session_index, args->thread_index);
816 s->tx_fifo->master_session_index = args->new_session_index;
817 s->tx_fifo->master_thread_index = args->new_thread_index;
818 transport_cleanup (session_get_transport_proto (s), s->connection_index,
821 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
824 session_handle_t new_sh;
825 new_sh = session_make_handle (args->new_session_index,
826 args->new_thread_index);
827 app_worker_migrate_notify (app_wrk, s, new_sh);
829 /* Trigger app read on the new thread */
830 session_enqueue_notify_thread (new_sh);
834 clib_mem_free (cb_args);
838 * Move dgram session to the right thread
841 session_dgram_connect_notify (transport_connection_t * tc,
842 u32 old_thread_index, session_t ** new_session)
845 session_switch_pool_args_t *rpc_args;
848 * Clone half-open session to the right thread.
850 new_s = session_clone_safe (tc->s_index, old_thread_index);
851 new_s->connection_index = tc->c_index;
852 new_s->rx_fifo->master_session_index = new_s->session_index;
853 new_s->rx_fifo->master_thread_index = new_s->thread_index;
854 new_s->session_state = SESSION_STATE_READY;
855 new_s->flags |= SESSION_F_IS_MIGRATING;
856 session_lookup_add_connection (tc, session_handle (new_s));
859 * Ask thread owning the old session to clean it up and make us the tx
862 rpc_args = clib_mem_alloc (sizeof (*rpc_args));
863 rpc_args->new_session_index = new_s->session_index;
864 rpc_args->new_thread_index = new_s->thread_index;
865 rpc_args->session_index = tc->s_index;
866 rpc_args->thread_index = old_thread_index;
867 session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool,
870 tc->s_index = new_s->session_index;
871 new_s->connection_index = tc->c_index;
872 *new_session = new_s;
877 * Notification from transport that connection is being closed.
879 * A disconnect is sent to application but state is not removed. Once
880 * disconnect is acknowledged by application, session disconnect is called.
881 * Ultimately this leads to close being called on transport (passive close).
884 session_transport_closing_notify (transport_connection_t * tc)
886 app_worker_t *app_wrk;
889 s = session_get (tc->s_index, tc->thread_index);
890 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
892 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
893 app_wrk = app_worker_get (s->app_wrk_index);
894 app_worker_close_notify (app_wrk, s);
898 * Notification from transport that connection is being deleted
900 * This removes the session if it is still valid. It should be called only on
901 * previously fully established sessions. For instance failed connects should
902 * call stream_session_connect_notify and indicate that the connect has
906 session_transport_delete_notify (transport_connection_t * tc)
910 /* App might've been removed already */
911 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
914 switch (s->session_state)
916 case SESSION_STATE_CREATED:
917 /* Session was created but accept notification was not yet sent to the
918 * app. Cleanup everything. */
919 session_lookup_del_session (s);
920 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
923 case SESSION_STATE_ACCEPTING:
924 case SESSION_STATE_TRANSPORT_CLOSING:
925 case SESSION_STATE_CLOSING:
926 case SESSION_STATE_TRANSPORT_CLOSED:
927 /* If transport finishes or times out before we get a reply
928 * from the app, mark transport as closed and wait for reply
929 * before removing the session. Cleanup session table in advance
930 * because transport will soon be closed and closed sessions
931 * are assumed to have been removed from the lookup table */
932 session_lookup_del_session (s);
933 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
934 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
935 svm_fifo_dequeue_drop_all (s->tx_fifo);
937 case SESSION_STATE_APP_CLOSED:
938 /* Cleanup lookup table as transport needs to still be valid.
939 * Program transport close to ensure that all session events
940 * have been cleaned up. Once transport close is called, the
941 * session is just removed because both transport and app have
942 * confirmed the close*/
943 session_lookup_del_session (s);
944 s->session_state = SESSION_STATE_TRANSPORT_DELETED;
945 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
946 svm_fifo_dequeue_drop_all (s->tx_fifo);
947 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
949 case SESSION_STATE_TRANSPORT_DELETED:
951 case SESSION_STATE_CLOSED:
952 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
956 clib_warning ("session state %u", s->session_state);
957 session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT);
964 * Notification from transport that it is closed
966 * Should be called by transport, prior to calling delete notify, once it
967 * knows that no more data will be exchanged. This could serve as an
968 * early acknowledgment of an active close especially if transport delete
969 * can be delayed a long time, e.g., tcp time-wait.
972 session_transport_closed_notify (transport_connection_t * tc)
974 app_worker_t *app_wrk;
977 if (!(s = session_get_if_valid (tc->s_index, tc->thread_index)))
980 /* Transport thinks that app requested close but it actually didn't.
981 * Can happen for tcp if fin and rst are received in close succession. */
982 if (s->session_state == SESSION_STATE_READY)
984 session_transport_closing_notify (tc);
985 svm_fifo_dequeue_drop_all (s->tx_fifo);
986 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
988 /* If app close has not been received or has not yet resulted in
989 * a transport close, only mark the session transport as closed */
990 else if (s->session_state <= SESSION_STATE_CLOSING)
992 s->session_state = SESSION_STATE_TRANSPORT_CLOSED;
994 /* If app also closed, switch to closed */
995 else if (s->session_state == SESSION_STATE_APP_CLOSED)
996 s->session_state = SESSION_STATE_CLOSED;
998 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1000 app_worker_transport_closed_notify (app_wrk, s);
1004 * Notify application that connection has been reset.
1007 session_transport_reset_notify (transport_connection_t * tc)
1009 app_worker_t *app_wrk;
1012 s = session_get (tc->s_index, tc->thread_index);
1013 svm_fifo_dequeue_drop_all (s->tx_fifo);
1014 if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
1016 s->session_state = SESSION_STATE_TRANSPORT_CLOSING;
1017 app_wrk = app_worker_get (s->app_wrk_index);
1018 app_worker_reset_notify (app_wrk, s);
1022 session_stream_accept_notify (transport_connection_t * tc)
1024 app_worker_t *app_wrk;
1027 s = session_get (tc->s_index, tc->thread_index);
1028 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1031 s->session_state = SESSION_STATE_ACCEPTING;
1032 if (app_worker_accept_notify (app_wrk, s))
1034 /* On transport delete, no notifications should be sent. Unless, the
1035 * accept is retried and successful. */
1036 s->session_state = SESSION_STATE_CREATED;
1043 * Accept a stream session. Optionally ping the server by callback.
1046 session_stream_accept (transport_connection_t * tc, u32 listener_index,
1047 u32 thread_index, u8 notify)
1052 s = session_alloc_for_connection (tc);
1053 s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index;
1054 s->session_state = SESSION_STATE_CREATED;
1056 if ((rv = app_worker_init_accepted (s)))
1059 session_lookup_add_connection (tc, session_handle (s));
1061 /* Shoulder-tap the server */
1064 app_worker_t *app_wrk = app_worker_get (s->app_wrk_index);
1065 return app_worker_accept_notify (app_wrk, s);
1072 session_open_cl (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1074 transport_connection_t *tc;
1075 transport_endpoint_cfg_t *tep;
1076 app_worker_t *app_wrk;
1077 session_handle_t sh;
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 /* For dgram type of service, allocate session and fifos now */
1092 app_wrk = app_worker_get (app_wrk_index);
1093 s = session_alloc_for_connection (tc);
1094 s->app_wrk_index = app_wrk->wrk_index;
1095 s->session_state = SESSION_STATE_OPENED;
1096 if (app_worker_init_connected (app_wrk, s))
1102 sh = session_handle (s);
1103 session_lookup_add_connection (tc, sh);
1104 return app_worker_connect_notify (app_wrk, s, opaque);
1108 session_open_vc (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1110 transport_connection_t *tc;
1111 transport_endpoint_cfg_t *tep;
1115 tep = session_endpoint_to_transport_cfg (rmt);
1116 rv = transport_connect (rmt->transport_proto, tep);
1119 SESSION_DBG ("Transport failed to open connection.");
1120 return VNET_API_ERROR_SESSION_CONNECT;
1123 tc = transport_get_half_open (rmt->transport_proto, (u32) rv);
1125 /* If transport offers a stream service, only allocate session once the
1126 * connection has been established.
1127 * Add connection to half-open table and save app and tc index. The
1128 * latter is needed to help establish the connection while the former
1129 * is needed when the connect notify comes and we have to notify the
1132 handle = (((u64) app_wrk_index) << 32) | (u64) tc->c_index;
1133 session_lookup_add_half_open (tc, handle);
1135 /* Store api_context (opaque) for when the reply comes. Not the nicest
1136 * thing but better than allocating a separate half-open pool.
1138 tc->s_index = opaque;
1139 if (transport_half_open_has_fifos (rmt->transport_proto))
1140 return session_ho_stream_connect_notify (tc, 0 /* is_fail */ );
1145 session_open_app (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1147 session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) rmt;
1148 transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (sep);
1150 sep->app_wrk_index = app_wrk_index;
1151 sep->opaque = opaque;
1153 return transport_connect (rmt->transport_proto, tep_cfg);
1156 typedef int (*session_open_service_fn) (u32, session_endpoint_t *, u32);
1159 static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = {
1167 * Ask transport to open connection to remote transport endpoint.
1169 * Stores handle for matching request with reply since the call can be
1170 * asynchronous. For instance, for TCP the 3-way handshake must complete
1171 * before reply comes. Session is only created once connection is established.
1173 * @param app_index Index of the application requesting the connect
1174 * @param st Session type requested.
1175 * @param tep Remote transport endpoint
1176 * @param opaque Opaque data (typically, api_context) the application expects
1177 * on open completion.
1180 session_open (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque)
1182 transport_service_type_t tst;
1183 tst = transport_protocol_service_type (rmt->transport_proto);
1184 return session_open_srv_fns[tst] (app_wrk_index, rmt, opaque);
1188 * Ask transport to listen on session endpoint.
1190 * @param s Session for which listen will be called. Note that unlike
1191 * established sessions, listen sessions are not associated to a
1193 * @param sep Local endpoint to be listened on.
1196 session_listen (session_t * ls, session_endpoint_cfg_t * sep)
1198 transport_endpoint_t *tep;
1199 u32 tc_index, s_index;
1201 /* Transport bind/listen */
1202 tep = session_endpoint_to_transport (sep);
1203 s_index = ls->session_index;
1204 tc_index = transport_start_listen (session_get_transport_proto (ls),
1207 if (tc_index == (u32) ~ 0)
1210 /* Attach transport to session. Lookup tables are populated by the app
1211 * worker because local tables (for ct sessions) are not backed by a fib */
1212 ls = listen_session_get (s_index);
1213 ls->connection_index = tc_index;
1219 * Ask transport to stop listening on local transport endpoint.
1221 * @param s Session to stop listening on. It must be in state LISTENING.
1224 session_stop_listen (session_t * s)
1226 transport_proto_t tp = session_get_transport_proto (s);
1227 transport_connection_t *tc;
1229 if (s->session_state != SESSION_STATE_LISTENING)
1232 tc = transport_get_listener (tp, s->connection_index);
1234 return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
1236 if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP))
1237 session_lookup_del_connection (tc);
1238 transport_stop_listen (tp, s->connection_index);
1243 * Initialize session closing procedure.
1245 * Request is always sent to session node to ensure that all outstanding
1246 * requests are served before transport is notified.
1249 session_close (session_t * s)
1254 if (s->session_state >= SESSION_STATE_CLOSING)
1256 /* Session will only be removed once both app and transport
1257 * acknowledge the close */
1258 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED
1259 || s->session_state == SESSION_STATE_TRANSPORT_DELETED)
1260 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1264 s->session_state = SESSION_STATE_CLOSING;
1265 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE);
1269 * Force a close without waiting for data to be flushed
1272 session_reset (session_t * s)
1274 if (s->session_state >= SESSION_STATE_CLOSING)
1276 /* Drop all outstanding tx data */
1277 svm_fifo_dequeue_drop_all (s->tx_fifo);
1278 s->session_state = SESSION_STATE_CLOSING;
1279 session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_RESET);
1283 * Notify transport the session can be disconnected. This should eventually
1284 * result in a delete notification that allows us to cleanup session state.
1285 * Called for both active/passive disconnects.
1287 * Must be called from the session's thread.
1290 session_transport_close (session_t * s)
1292 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1294 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1295 s->session_state = SESSION_STATE_CLOSED;
1296 /* If transport is already deleted, just free the session */
1297 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1298 session_free_w_fifos (s);
1302 /* If the tx queue wasn't drained, the transport can continue to try
1303 * sending the outstanding data (in closed state it cannot). It MUST however
1304 * at one point, either after sending everything or after a timeout, call
1305 * delete notify. This will finally lead to the complete cleanup of the
1308 s->session_state = SESSION_STATE_APP_CLOSED;
1310 transport_close (session_get_transport_proto (s), s->connection_index,
1315 * Force transport close
1318 session_transport_reset (session_t * s)
1320 if (s->session_state >= SESSION_STATE_APP_CLOSED)
1322 if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED)
1323 s->session_state = SESSION_STATE_CLOSED;
1324 else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED)
1325 session_free_w_fifos (s);
1329 s->session_state = SESSION_STATE_APP_CLOSED;
1330 transport_reset (session_get_transport_proto (s), s->connection_index,
1335 * Cleanup transport and session state.
1337 * Notify transport of the cleanup and free the session. This should
1338 * be called only if transport reported some error and is already
1342 session_transport_cleanup (session_t * s)
1344 /* Delete from main lookup table before we axe the the transport */
1345 session_lookup_del_session (s);
1346 if (s->session_state != SESSION_STATE_TRANSPORT_DELETED)
1347 transport_cleanup (session_get_transport_proto (s), s->connection_index,
1349 /* Since we called cleanup, no delete notification will come. So, make
1350 * sure the session is properly freed. */
1351 segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
1356 * Allocate event queues in the shared-memory segment
1358 * That can either be a newly created memfd segment, that will need to be
1359 * mapped by all stack users, or the binary api's svm region. The latter is
1360 * assumed to be already mapped. NOTE that this assumption DOES NOT hold if
1361 * api clients bootstrap shm api over sockets (i.e. use memfd segments) and
1362 * vpp uses api svm region for event queues.
1365 session_vpp_event_queues_allocate (session_main_t * smm)
1367 u32 evt_q_length = 2048, evt_size = sizeof (session_event_t);
1368 ssvm_private_t *eqs = &smm->evt_qs_segment;
1369 uword eqs_size = 64 << 20;
1370 pid_t vpp_pid = getpid ();
1374 if (smm->configured_event_queue_length)
1375 evt_q_length = smm->configured_event_queue_length;
1377 if (smm->evt_qs_use_memfd_seg)
1379 if (smm->evt_qs_segment_size)
1380 eqs_size = smm->evt_qs_segment_size;
1382 eqs->ssvm_size = eqs_size;
1383 eqs->i_am_master = 1;
1384 eqs->my_pid = vpp_pid;
1385 eqs->name = format (0, "%s%c", "evt-qs-segment", 0);
1386 eqs->requested_va = smm->session_baseva;
1388 if (ssvm_master_init (eqs, SSVM_SEGMENT_MEMFD))
1390 clib_warning ("failed to initialize queue segment");
1395 if (smm->evt_qs_use_memfd_seg)
1396 oldheap = ssvm_push_heap (eqs->sh);
1398 oldheap = vl_msg_push_heap ();
1400 for (i = 0; i < vec_len (smm->wrk); i++)
1402 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
1403 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
1404 {evt_q_length, evt_size, 0}
1406 {evt_q_length >> 1, 256, 0}
1408 cfg->consumer_pid = 0;
1410 cfg->q_nitems = evt_q_length;
1411 cfg->ring_cfgs = rc;
1412 smm->wrk[i].vpp_event_queue = svm_msg_q_alloc (cfg);
1413 if (smm->evt_qs_use_memfd_seg)
1415 if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue))
1416 clib_warning ("eventfd returned");
1420 if (smm->evt_qs_use_memfd_seg)
1421 ssvm_pop_heap (oldheap);
1423 vl_msg_pop_heap (oldheap);
1427 session_main_get_evt_q_segment (void)
1429 session_main_t *smm = &session_main;
1430 if (smm->evt_qs_use_memfd_seg)
1431 return &smm->evt_qs_segment;
1436 session_segment_handle (session_t * s)
1441 return SESSION_INVALID_HANDLE;
1444 return segment_manager_make_segment_handle (f->segment_manager,
1449 static session_fifo_rx_fn *session_tx_fns[TRANSPORT_TX_N_FNS] = {
1450 session_tx_fifo_peek_and_snd,
1451 session_tx_fifo_dequeue_and_snd,
1452 session_tx_fifo_dequeue_internal,
1453 session_tx_fifo_dequeue_and_snd
1458 * Initialize session layer for given transport proto and ip version
1460 * Allocates per session type (transport proto + ip version) data structures
1461 * and adds arc from session queue node to session type output node.
1464 session_register_transport (transport_proto_t transport_proto,
1465 const transport_proto_vft_t * vft, u8 is_ip4,
1468 session_main_t *smm = &session_main;
1469 session_type_t session_type;
1470 u32 next_index = ~0;
1472 session_type = session_type_from_proto_and_ip (transport_proto, is_ip4);
1474 vec_validate (smm->session_type_to_next, session_type);
1475 vec_validate (smm->session_tx_fns, session_type);
1478 if (output_node != ~0)
1480 foreach_vlib_main (({
1481 next_index = vlib_node_add_next (this_vlib_main,
1482 session_queue_node.index,
1488 smm->session_type_to_next[session_type] = next_index;
1489 smm->session_tx_fns[session_type] =
1490 session_tx_fns[vft->transport_options.tx_type];
1493 transport_connection_t *
1494 session_get_transport (session_t * s)
1496 if (s->session_state != SESSION_STATE_LISTENING)
1497 return transport_get_connection (session_get_transport_proto (s),
1498 s->connection_index, s->thread_index);
1500 return transport_get_listener (session_get_transport_proto (s),
1501 s->connection_index);
1505 session_get_endpoint (session_t * s, transport_endpoint_t * tep, u8 is_lcl)
1507 if (s->session_state != SESSION_STATE_LISTENING)
1508 return transport_get_endpoint (session_get_transport_proto (s),
1509 s->connection_index, s->thread_index, tep,
1512 return transport_get_listener_endpoint (session_get_transport_proto (s),
1513 s->connection_index, tep, is_lcl);
1516 transport_connection_t *
1517 listen_session_get_transport (session_t * s)
1519 return transport_get_listener (session_get_transport_proto (s),
1520 s->connection_index);
1524 session_flush_frames_main_thread (vlib_main_t * vm)
1526 ASSERT (vlib_get_thread_index () == 0);
1527 vlib_process_signal_event_mt (vm, session_queue_process_node.index,
1528 SESSION_Q_PROCESS_FLUSH_FRAMES, 0);
1531 static clib_error_t *
1532 session_manager_main_enable (vlib_main_t * vm)
1534 segment_manager_main_init_args_t _sm_args = { 0 }, *sm_args = &_sm_args;
1535 session_main_t *smm = &session_main;
1536 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1537 u32 num_threads, preallocated_sessions_per_worker;
1538 session_worker_t *wrk;
1541 num_threads = 1 /* main thread */ + vtm->n_threads;
1543 if (num_threads < 1)
1544 return clib_error_return (0, "n_thread_stacks not set");
1546 /* Allocate cache line aligned worker contexts */
1547 vec_validate_aligned (smm->wrk, num_threads - 1, CLIB_CACHE_LINE_BYTES);
1549 for (i = 0; i < num_threads; i++)
1552 wrk->ctrl_head = clib_llist_make_head (wrk->event_elts, evt_list);
1553 wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list);
1554 wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list);
1555 wrk->vm = vlib_mains[i];
1556 wrk->last_vlib_time = vlib_time_now (vlib_mains[i]);
1557 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
1559 if (num_threads > 1)
1560 clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
1563 /* Allocate vpp event queues segment and queue */
1564 session_vpp_event_queues_allocate (smm);
1566 /* Initialize fifo segment main baseva and timeout */
1567 sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size;
1568 sm_args->size = smm->session_va_space_size;
1569 segment_manager_main_init (sm_args);
1571 /* Preallocate sessions */
1572 if (smm->preallocated_sessions)
1574 if (num_threads == 1)
1576 pool_init_fixed (smm->wrk[0].sessions, smm->preallocated_sessions);
1581 preallocated_sessions_per_worker =
1582 (1.1 * (f64) smm->preallocated_sessions /
1583 (f64) (num_threads - 1));
1585 for (j = 1; j < num_threads; j++)
1587 pool_init_fixed (smm->wrk[j].sessions,
1588 preallocated_sessions_per_worker);
1593 session_lookup_init ();
1594 app_namespaces_init ();
1597 smm->is_enabled = 1;
1599 /* Enable transports */
1600 transport_enable_disable (vm, 1);
1605 session_node_enable_disable (u8 is_en)
1607 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
1608 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1609 u8 have_workers = vtm->n_threads != 0;
1612 foreach_vlib_main (({
1613 if (have_workers && ii == 0)
1615 vlib_node_set_state (this_vlib_main, session_queue_process_node.index,
1619 vlib_node_t *n = vlib_get_node (this_vlib_main,
1620 session_queue_process_node.index);
1621 vlib_start_process (this_vlib_main, n->runtime_index);
1625 vlib_process_signal_event_mt (this_vlib_main,
1626 session_queue_process_node.index,
1627 SESSION_Q_PROCESS_STOP, 0);
1632 vlib_node_set_state (this_vlib_main, session_queue_node.index,
1639 vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
1641 clib_error_t *error = 0;
1644 if (session_main.is_enabled)
1647 error = session_manager_main_enable (vm);
1648 session_node_enable_disable (is_en);
1652 session_main.is_enabled = 0;
1653 session_node_enable_disable (is_en);
1660 session_manager_main_init (vlib_main_t * vm)
1662 session_main_t *smm = &session_main;
1663 smm->session_baseva = HIGH_SEGMENT_BASEVA;
1664 #if (HIGH_SEGMENT_BASEVA > (4ULL << 30))
1665 smm->session_va_space_size = 128ULL << 30;
1666 smm->evt_qs_segment_size = 64 << 20;
1668 smm->session_va_space_size = 128 << 20;
1669 smm->evt_qs_segment_size = 1 << 20;
1671 smm->is_enabled = 0;
1672 smm->session_enable_asap = 0;
1676 static clib_error_t *
1677 session_main_init (vlib_main_t * vm)
1679 session_main_t *smm = &session_main;
1680 if (smm->session_enable_asap)
1682 vlib_worker_thread_barrier_sync (vm);
1683 vnet_session_enable_disable (vm, 1 /* is_en */ );
1684 vlib_worker_thread_barrier_release (vm);
1689 VLIB_INIT_FUNCTION (session_manager_main_init);
1690 VLIB_MAIN_LOOP_ENTER_FUNCTION (session_main_init);
1692 static clib_error_t *
1693 session_config_fn (vlib_main_t * vm, unformat_input_t * input)
1695 session_main_t *smm = &session_main;
1699 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1701 if (unformat (input, "event-queue-length %d", &nitems))
1704 smm->configured_event_queue_length = nitems;
1706 clib_warning ("event queue length %d too small, ignored", nitems);
1708 else if (unformat (input, "preallocated-sessions %d",
1709 &smm->preallocated_sessions))
1711 else if (unformat (input, "v4-session-table-buckets %d",
1712 &smm->configured_v4_session_table_buckets))
1714 else if (unformat (input, "v4-halfopen-table-buckets %d",
1715 &smm->configured_v4_halfopen_table_buckets))
1717 else if (unformat (input, "v6-session-table-buckets %d",
1718 &smm->configured_v6_session_table_buckets))
1720 else if (unformat (input, "v6-halfopen-table-buckets %d",
1721 &smm->configured_v6_halfopen_table_buckets))
1723 else if (unformat (input, "v4-session-table-memory %U",
1724 unformat_memory_size, &tmp))
1726 if (tmp >= 0x100000000)
1727 return clib_error_return (0, "memory size %llx (%lld) too large",
1729 smm->configured_v4_session_table_memory = tmp;
1731 else if (unformat (input, "v4-halfopen-table-memory %U",
1732 unformat_memory_size, &tmp))
1734 if (tmp >= 0x100000000)
1735 return clib_error_return (0, "memory size %llx (%lld) too large",
1737 smm->configured_v4_halfopen_table_memory = tmp;
1739 else if (unformat (input, "v6-session-table-memory %U",
1740 unformat_memory_size, &tmp))
1742 if (tmp >= 0x100000000)
1743 return clib_error_return (0, "memory size %llx (%lld) too large",
1745 smm->configured_v6_session_table_memory = tmp;
1747 else if (unformat (input, "v6-halfopen-table-memory %U",
1748 unformat_memory_size, &tmp))
1750 if (tmp >= 0x100000000)
1751 return clib_error_return (0, "memory size %llx (%lld) too large",
1753 smm->configured_v6_halfopen_table_memory = tmp;
1755 else if (unformat (input, "local-endpoints-table-memory %U",
1756 unformat_memory_size, &tmp))
1758 if (tmp >= 0x100000000)
1759 return clib_error_return (0, "memory size %llx (%lld) too large",
1761 smm->local_endpoints_table_memory = tmp;
1763 else if (unformat (input, "local-endpoints-table-buckets %d",
1764 &smm->local_endpoints_table_buckets))
1766 else if (unformat (input, "evt_qs_memfd_seg"))
1767 smm->evt_qs_use_memfd_seg = 1;
1768 else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size,
1769 &smm->evt_qs_segment_size))
1771 else if (unformat (input, "enable"))
1772 smm->session_enable_asap = 1;
1774 return clib_error_return (0, "unknown input `%U'",
1775 format_unformat_error, input);
1780 VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1783 * fd.io coding-style-patch-verification: ON
1786 * eval: (c-set-style "gnu")