2 * Copyright (c) 2017 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 <vlibmemory/api.h>
24 #include <vnet/dpo/load_balance.h>
25 #include <vnet/fib/ip4_fib.h>
26 #include <vnet/tcp/tcp.h>
28 session_manager_main_t session_manager_main;
29 extern transport_proto_vft_t *tp_vfts;
32 stream_session_create_i (segment_manager_t * sm, transport_connection_t * tc,
33 u8 alloc_fifos, stream_session_t ** ret_s)
35 session_manager_main_t *smm = &session_manager_main;
36 svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0;
37 u32 fifo_segment_index;
41 u32 thread_index = tc->thread_index;
44 ASSERT (thread_index == vlib_get_thread_index ());
46 /* Create the session */
47 pool_get_aligned (smm->sessions[thread_index], s, CLIB_CACHE_LINE_BYTES);
48 memset (s, 0, sizeof (*s));
49 pool_index = s - smm->sessions[thread_index];
54 if ((rv = segment_manager_alloc_session_fifos (sm, &server_rx_fifo,
56 &fifo_segment_index)))
58 pool_put (smm->sessions[thread_index], s);
61 /* Initialize backpointers */
62 server_rx_fifo->master_session_index = pool_index;
63 server_rx_fifo->master_thread_index = thread_index;
65 server_tx_fifo->master_session_index = pool_index;
66 server_tx_fifo->master_thread_index = thread_index;
68 s->server_rx_fifo = server_rx_fifo;
69 s->server_tx_fifo = server_tx_fifo;
70 s->svm_segment_index = fifo_segment_index;
73 /* Initialize state machine, such as it is... */
74 s->session_type = session_type_from_proto_and_ip (tc->transport_proto,
76 s->session_state = SESSION_STATE_CONNECTING;
77 s->thread_index = thread_index;
78 s->session_index = pool_index;
80 /* Attach transport to session */
81 s->connection_index = tc->c_index;
83 /* Attach session to transport */
84 tc->s_index = s->session_index;
86 /* Add to the main lookup table */
87 value = stream_session_handle (s);
88 stream_session_table_add_for_tc (tc, value);
96 * Discards bytes from buffer chain
98 * It discards n_bytes_to_drop starting at first buffer after chain_b
101 session_enqueue_discard_chain_bytes (vlib_main_t * vm, vlib_buffer_t * b,
102 vlib_buffer_t ** chain_b,
105 vlib_buffer_t *next = *chain_b;
106 u32 to_drop = n_bytes_to_drop;
107 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
108 while (to_drop && (next->flags & VLIB_BUFFER_NEXT_PRESENT))
110 next = vlib_get_buffer (vm, next->next_buffer);
111 if (next->current_length > to_drop)
113 vlib_buffer_advance (next, to_drop);
118 to_drop -= next->current_length;
119 next->current_length = 0;
125 b->total_length_not_including_first_buffer -= n_bytes_to_drop;
129 * Enqueue buffer chain tail
132 session_enqueue_chain_tail (stream_session_t * s, vlib_buffer_t * b,
133 u32 offset, u8 is_in_order)
135 vlib_buffer_t *chain_b;
136 u32 chain_bi, len, diff;
137 vlib_main_t *vm = vlib_get_main ();
142 if (is_in_order && offset)
144 diff = offset - b->current_length;
145 if (diff > b->total_length_not_including_first_buffer)
148 session_enqueue_discard_chain_bytes (vm, b, &chain_b, diff);
149 chain_bi = vlib_get_buffer_index (vm, chain_b);
152 chain_bi = b->next_buffer;
156 chain_b = vlib_get_buffer (vm, chain_bi);
157 data = vlib_buffer_get_current (chain_b);
158 len = chain_b->current_length;
163 rv = svm_fifo_enqueue_nowait (s->server_rx_fifo, len, data);
170 return (rv > 0) ? (written + rv) : written;
176 /* written more than what was left in chain */
177 if (written > b->total_length_not_including_first_buffer)
180 /* drop the bytes that have already been delivered */
181 session_enqueue_discard_chain_bytes (vm, b, &chain_b, rv - len);
186 rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset, len,
190 clib_warning ("failed to enqueue multi-buffer seg");
196 while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT)
197 ? chain_b->next_buffer : 0));
206 * Enqueue data for delivery to session peer. Does not notify peer of enqueue
207 * event but on request can queue notification events for later delivery by
208 * calling stream_server_flush_enqueue_events().
210 * @param tc Transport connection which is to be enqueued data
211 * @param b Buffer to be enqueued
212 * @param offset Offset at which to start enqueueing if out-of-order
213 * @param queue_event Flag to indicate if peer is to be notified or if event
214 * is to be queued. The former is useful when more data is
215 * enqueued and only one event is to be generated.
216 * @param is_in_order Flag to indicate if data is in order
217 * @return Number of bytes enqueued or a negative value if enqueueing failed.
220 stream_session_enqueue_data (transport_connection_t * tc, vlib_buffer_t * b,
221 u32 offset, u8 queue_event, u8 is_in_order)
224 int enqueued = 0, rv, in_order_off;
226 s = stream_session_get (tc->s_index, tc->thread_index);
230 enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo,
232 vlib_buffer_get_current (b));
233 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT)
236 in_order_off = enqueued > b->current_length ? enqueued : 0;
237 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
244 rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset,
246 vlib_buffer_get_current (b));
247 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv))
248 session_enqueue_chain_tail (s, b, offset + b->current_length, 0);
249 /* if something was enqueued, report even this as success for ooo
250 * segment handling */
256 /* Queue RX event on this fifo. Eventually these will need to be flushed
257 * by calling stream_server_flush_enqueue_events () */
258 session_manager_main_t *smm = vnet_get_session_manager_main ();
259 u32 thread_index = s->thread_index;
260 u32 my_enqueue_epoch = smm->current_enqueue_epoch[thread_index];
262 if (s->enqueue_epoch != my_enqueue_epoch)
264 s->enqueue_epoch = my_enqueue_epoch;
265 vec_add1 (smm->session_indices_to_enqueue_by_thread[thread_index],
266 s - smm->sessions[thread_index]);
276 /** Check if we have space in rx fifo to push more bytes */
278 stream_session_no_space (transport_connection_t * tc, u32 thread_index,
281 stream_session_t *s = stream_session_get (tc->s_index, thread_index);
283 if (PREDICT_FALSE (s->session_state != SESSION_STATE_READY))
286 if (data_len > svm_fifo_max_enqueue (s->server_rx_fifo))
293 stream_session_tx_fifo_max_dequeue (transport_connection_t * tc)
295 stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
296 if (!s->server_tx_fifo)
298 return svm_fifo_max_dequeue (s->server_tx_fifo);
302 stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer,
303 u32 offset, u32 max_bytes)
305 stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
306 return svm_fifo_peek (s->server_tx_fifo, offset, max_bytes, buffer);
310 stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
312 stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index);
313 return svm_fifo_dequeue_drop (s->server_tx_fifo, max_bytes);
317 * Notify session peer that new data has been enqueued.
319 * @param s Stream session for which the event is to be generated.
320 * @param block Flag to indicate if call should block if event queue is full.
322 * @return 0 on succes or negative number if failed to send notification.
325 stream_session_enqueue_notify (stream_session_t * s, u8 block)
328 session_fifo_event_t evt;
329 unix_shared_memory_queue_t *q;
330 static u32 serial_number;
332 if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
335 /* Get session's server */
336 app = application_get_if_valid (s->app_index);
338 if (PREDICT_FALSE (app == 0))
340 clib_warning ("invalid s->app_index = %d", s->app_index);
344 /* Built-in server? Hand event to the callback... */
345 if (app->cb_fns.builtin_server_rx_callback)
346 return app->cb_fns.builtin_server_rx_callback (s);
348 /* If no event, send one */
349 if (svm_fifo_set_event (s->server_rx_fifo))
351 /* Fabricate event */
352 evt.fifo = s->server_rx_fifo;
353 evt.event_type = FIFO_EVENT_APP_RX;
354 evt.event_id = serial_number++;
356 /* Add event to server's event queue */
357 q = app->event_queue;
359 /* Based on request block (or not) for lack of space */
360 if (block || PREDICT_TRUE (q->cursize < q->maxsize))
361 unix_shared_memory_queue_add (app->event_queue, (u8 *) & evt,
362 0 /* do wait for mutex */ );
365 clib_warning ("fifo full");
371 SESSION_EVT_DBG(SESSION_EVT_ENQ, s, ({
372 ed->data[0] = evt.event_id;
373 ed->data[1] = svm_fifo_max_dequeue (s->server_rx_fifo);
381 * Flushes queue of sessions that are to be notified of new data
384 * @param thread_index Thread index for which the flush is to be performed.
385 * @return 0 on success or a positive number indicating the number of
386 * failures due to API queue being full.
389 session_manager_flush_enqueue_events (u32 thread_index)
391 session_manager_main_t *smm = &session_manager_main;
392 u32 *session_indices_to_enqueue;
395 session_indices_to_enqueue =
396 smm->session_indices_to_enqueue_by_thread[thread_index];
398 for (i = 0; i < vec_len (session_indices_to_enqueue); i++)
400 stream_session_t *s0;
403 s0 = stream_session_get_if_valid (session_indices_to_enqueue[i],
405 if (s0 == 0 || stream_session_enqueue_notify (s0, 0 /* don't block */ ))
411 vec_reset_length (session_indices_to_enqueue);
413 smm->session_indices_to_enqueue_by_thread[thread_index] =
414 session_indices_to_enqueue;
416 /* Increment enqueue epoch for next round */
417 smm->current_enqueue_epoch[thread_index]++;
423 * Init fifo tail and head pointers
425 * Useful if transport uses absolute offsets for tracking ooo segments.
428 stream_session_init_fifos_pointers (transport_connection_t * tc,
429 u32 rx_pointer, u32 tx_pointer)
432 s = stream_session_get (tc->s_index, tc->thread_index);
433 svm_fifo_init_pointers (s->server_rx_fifo, rx_pointer);
434 svm_fifo_init_pointers (s->server_tx_fifo, tx_pointer);
438 stream_session_connect_notify (transport_connection_t * tc, u8 is_fail)
441 stream_session_t *new_s = 0;
447 st = session_type_from_proto_and_ip (tc->transport_proto, tc->is_ip4);
448 handle = stream_session_half_open_lookup_handle (&tc->lcl_ip, &tc->rmt_ip,
449 tc->lcl_port, tc->rmt_port,
451 if (handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
453 clib_warning ("This can't be good!");
457 /* Get the app's index from the handle we stored when opening connection
458 * and the opaque (api_context for external apps) from transport session
460 app = application_get (handle >> 32);
461 opaque = tc->s_index;
465 segment_manager_t *sm;
467 sm = application_get_connect_segment_manager (app);
468 alloc_fifos = application_is_proxy (app);
469 /* Create new session (svm segments are allocated if needed) */
470 if (stream_session_create_i (sm, tc, alloc_fifos, &new_s))
476 new_s->app_index = app->index;
479 /* Notify client application */
480 if (app->cb_fns.session_connected_callback (app->index, opaque, new_s,
483 clib_warning ("failed to notify app");
485 stream_session_disconnect (new_s);
490 new_s->session_state = SESSION_STATE_READY;
493 /* Cleanup session lookup */
494 stream_session_half_open_table_del (tc);
500 stream_session_accept_notify (transport_connection_t * tc)
502 application_t *server;
505 s = stream_session_get (tc->s_index, tc->thread_index);
506 server = application_get (s->app_index);
507 server->cb_fns.session_accept_callback (s);
511 * Notification from transport that connection is being closed.
513 * A disconnect is sent to application but state is not removed. Once
514 * disconnect is acknowledged by application, session disconnect is called.
515 * Ultimately this leads to close being called on transport (passive close).
518 stream_session_disconnect_notify (transport_connection_t * tc)
520 application_t *server;
523 s = stream_session_get (tc->s_index, tc->thread_index);
524 server = application_get (s->app_index);
525 server->cb_fns.session_disconnect_callback (s);
529 * Cleans up session and associated app if needed.
532 stream_session_delete (stream_session_t * s)
534 session_manager_main_t *smm = vnet_get_session_manager_main ();
537 /* Delete from the main lookup table. */
538 if ((rv = stream_session_table_del (s)))
539 clib_warning ("hash delete error, rv %d", rv);
541 /* Cleanup fifo segments */
542 segment_manager_dealloc_fifos (s->svm_segment_index, s->server_rx_fifo,
545 pool_put (smm->sessions[s->thread_index], s);
547 memset (s, 0xFA, sizeof (*s));
551 * Notification from transport that connection is being deleted
553 * This should be called only on previously fully established sessions. For
554 * instance failed connects should call stream_session_connect_notify and
555 * indicate that the connect has failed.
558 stream_session_delete_notify (transport_connection_t * tc)
562 /* App might've been removed already */
563 s = stream_session_get_if_valid (tc->s_index, tc->thread_index);
568 stream_session_delete (s);
572 * Notify application that connection has been reset.
575 stream_session_reset_notify (transport_connection_t * tc)
579 s = stream_session_get (tc->s_index, tc->thread_index);
581 app = application_get (s->app_index);
582 app->cb_fns.session_reset_callback (s);
586 * Accept a stream session. Optionally ping the server by callback.
589 stream_session_accept (transport_connection_t * tc, u32 listener_index,
592 application_t *server;
593 stream_session_t *s, *listener;
594 segment_manager_t *sm;
598 /* Find the server */
599 listener = listen_session_get (sst, listener_index);
600 server = application_get (listener->app_index);
602 sm = application_get_listen_segment_manager (server, listener);
603 if ((rv = stream_session_create_i (sm, tc, 1, &s)))
606 s->app_index = server->index;
607 s->listener_index = listener_index;
608 s->session_state = SESSION_STATE_ACCEPTING;
610 /* Shoulder-tap the server */
613 server->cb_fns.session_accept_callback (s);
620 * Ask transport to open connection to remote transport endpoint.
622 * Stores handle for matching request with reply since the call can be
623 * asynchronous. For instance, for TCP the 3-way handshake must complete
624 * before reply comes. Session is only created once connection is established.
626 * @param app_index Index of the application requesting the connect
627 * @param st Session type requested.
628 * @param tep Remote transport endpoint
629 * @param res Resulting transport connection .
632 stream_session_open (u32 app_index, session_type_t st,
633 transport_endpoint_t * rmt,
634 transport_connection_t ** res)
636 transport_connection_t *tc;
640 rv = tp_vfts[st].open (rmt);
643 clib_warning ("Transport failed to open connection.");
644 return VNET_API_ERROR_SESSION_CONNECT_FAIL;
647 tc = tp_vfts[st].get_half_open ((u32) rv);
649 /* Save app and tc index. The latter is needed to help establish the
650 * connection while the former is needed when the connect notify comes
651 * and we have to notify the external app */
652 handle = (((u64) app_index) << 32) | (u64) tc->c_index;
654 /* Add to the half-open lookup table */
655 stream_session_half_open_table_add (tc, handle);
663 * Ask transport to listen on local transport endpoint.
665 * @param s Session for which listen will be called. Note that unlike
666 * established sessions, listen sessions are not associated to a
668 * @param tep Local endpoint to be listened on.
671 stream_session_listen (stream_session_t * s, transport_endpoint_t * tep)
673 transport_connection_t *tc;
676 /* Transport bind/listen */
677 tci = tp_vfts[s->session_type].bind (s->session_index, tep);
679 if (tci == (u32) ~ 0)
682 /* Attach transport to session */
683 s->connection_index = tci;
684 tc = tp_vfts[s->session_type].get_listener (tci);
686 /* Weird but handle it ... */
690 /* Add to the main lookup table */
691 stream_session_table_add_for_tc (tc, s->session_index);
697 * Ask transport to stop listening on local transport endpoint.
699 * @param s Session to stop listening on. It must be in state LISTENING.
702 stream_session_stop_listen (stream_session_t * s)
704 transport_connection_t *tc;
706 if (s->session_state != SESSION_STATE_LISTENING)
708 clib_warning ("not a listening session");
712 tc = tp_vfts[s->session_type].get_listener (s->connection_index);
715 clib_warning ("no transport");
716 return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
719 stream_session_table_del_for_tc (tc);
720 tp_vfts[s->session_type].unbind (s->connection_index);
725 session_send_session_evt_to_thread (u64 session_handle,
726 fifo_event_type_t evt_type,
729 static u16 serial_number = 0;
730 session_fifo_event_t evt;
731 unix_shared_memory_queue_t *q;
733 /* Fabricate event */
734 evt.session_handle = session_handle;
735 evt.event_type = evt_type;
736 evt.event_id = serial_number++;
738 q = session_manager_get_vpp_event_queue (thread_index);
740 /* Based on request block (or not) for lack of space */
741 if (PREDICT_TRUE (q->cursize < q->maxsize))
743 if (unix_shared_memory_queue_add (q, (u8 *) & evt,
744 1 /* do wait for mutex */ ))
746 clib_warning ("failed to enqueue evt");
751 clib_warning ("queue full");
757 * Disconnect session and propagate to transport. This should eventually
758 * result in a delete notification that allows us to cleanup session state.
759 * Called for both active/passive disconnects.
761 * Should be called from the session's thread.
764 stream_session_disconnect (stream_session_t * s)
766 s->session_state = SESSION_STATE_CLOSED;
767 tp_vfts[s->session_type].close (s->connection_index, s->thread_index);
771 * Cleanup transport and session state.
773 * Notify transport of the cleanup, wait for a delete notify to actually
774 * remove the session state.
777 stream_session_cleanup (stream_session_t * s)
781 s->session_state = SESSION_STATE_CLOSED;
783 /* Delete from the main lookup table to avoid more enqueues */
784 rv = stream_session_table_del (s);
786 clib_warning ("hash delete error, rv %d", rv);
788 tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index);
792 * Allocate vpp event queue (once) per worker thread
795 session_vpp_event_queue_allocate (session_manager_main_t * smm,
798 api_main_t *am = &api_main;
800 u32 event_queue_length = 2048;
802 if (smm->vpp_event_queues[thread_index] == 0)
804 /* Allocate event fifo in the /vpe-api shared-memory segment */
805 oldheap = svm_push_data_heap (am->vlib_rp);
807 if (smm->configured_event_queue_length)
808 event_queue_length = smm->configured_event_queue_length;
810 smm->vpp_event_queues[thread_index] =
811 unix_shared_memory_queue_init
813 sizeof (session_fifo_event_t), 0 /* consumer pid */ ,
814 0 /* (do not) send signal when queue non-empty */ );
816 svm_pop_heap (oldheap);
821 session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4)
823 if (proto == TRANSPORT_PROTO_TCP)
826 return SESSION_TYPE_IP4_TCP;
828 return SESSION_TYPE_IP6_TCP;
833 return SESSION_TYPE_IP4_UDP;
835 return SESSION_TYPE_IP6_UDP;
838 return SESSION_N_TYPES;
841 static clib_error_t *
842 session_manager_main_enable (vlib_main_t * vm)
844 session_manager_main_t *smm = &session_manager_main;
845 vlib_thread_main_t *vtm = vlib_get_thread_main ();
847 u32 preallocated_sessions_per_worker;
850 num_threads = 1 /* main thread */ + vtm->n_threads;
853 return clib_error_return (0, "n_thread_stacks not set");
855 /* $$$ config parameters */
856 svm_fifo_segment_init (0x200000000ULL /* first segment base VA */ ,
857 20 /* timeout in seconds */ );
859 /* configure per-thread ** vectors */
860 vec_validate (smm->sessions, num_threads - 1);
861 vec_validate (smm->session_indices_to_enqueue_by_thread, num_threads - 1);
862 vec_validate (smm->tx_buffers, num_threads - 1);
863 vec_validate (smm->pending_event_vector, num_threads - 1);
864 vec_validate (smm->free_event_vector, num_threads - 1);
865 vec_validate (smm->current_enqueue_epoch, num_threads - 1);
866 vec_validate (smm->vpp_event_queues, num_threads - 1);
868 for (i = 0; i < num_threads; i++)
870 vec_validate (smm->free_event_vector[i], 0);
871 _vec_len (smm->free_event_vector[i]) = 0;
872 vec_validate (smm->pending_event_vector[i], 0);
873 _vec_len (smm->pending_event_vector[i]) = 0;
877 vec_validate (smm->last_event_poll_by_thread, num_threads - 1);
880 /* Allocate vpp event queues */
881 for (i = 0; i < vec_len (smm->vpp_event_queues); i++)
882 session_vpp_event_queue_allocate (smm, i);
884 /* Preallocate sessions */
885 if (num_threads == 1)
887 for (i = 0; i < smm->preallocated_sessions; i++)
889 stream_session_t *ss __attribute__ ((unused));
890 pool_get_aligned (smm->sessions[0], ss, CLIB_CACHE_LINE_BYTES);
893 for (i = 0; i < smm->preallocated_sessions; i++)
894 pool_put_index (smm->sessions[0], i);
899 preallocated_sessions_per_worker = smm->preallocated_sessions /
902 for (j = 1; j < num_threads; j++)
904 for (i = 0; i < preallocated_sessions_per_worker; i++)
906 stream_session_t *ss __attribute__ ((unused));
907 pool_get_aligned (smm->sessions[j], ss, CLIB_CACHE_LINE_BYTES);
909 for (i = 0; i < preallocated_sessions_per_worker; i++)
910 pool_put_index (smm->sessions[j], i);
914 session_lookup_init ();
918 /* Enable TCP transport */
919 vnet_tcp_enable_disable (vm, 1);
925 session_node_enable_disable (u8 is_en)
927 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
929 foreach_vlib_main (({
930 vlib_node_set_state (this_vlib_main, session_queue_node.index,
937 vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
941 if (session_manager_main.is_enabled)
944 session_node_enable_disable (is_en);
946 return session_manager_main_enable (vm);
950 session_manager_main.is_enabled = 0;
951 session_node_enable_disable (is_en);
958 session_manager_main_init (vlib_main_t * vm)
960 session_manager_main_t *smm = &session_manager_main;
965 VLIB_INIT_FUNCTION (session_manager_main_init);
967 static clib_error_t *
968 session_config_fn (vlib_main_t * vm, unformat_input_t * input)
970 session_manager_main_t *smm = &session_manager_main;
974 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
976 if (unformat (input, "event-queue-length %d", &nitems))
979 smm->configured_event_queue_length = nitems;
981 clib_warning ("event queue length %d too small, ignored", nitems);
983 else if (unformat (input, "preallocated-sessions %d",
984 &smm->preallocated_sessions))
986 else if (unformat (input, "v4-session-table-buckets %d",
987 &smm->configured_v4_session_table_buckets))
989 else if (unformat (input, "v4-halfopen-table-buckets %d",
990 &smm->configured_v4_halfopen_table_buckets))
992 else if (unformat (input, "v6-session-table-buckets %d",
993 &smm->configured_v6_session_table_buckets))
995 else if (unformat (input, "v6-halfopen-table-buckets %d",
996 &smm->configured_v6_halfopen_table_buckets))
998 else if (unformat (input, "v4-session-table-memory %U",
999 unformat_memory_size, &tmp))
1001 if (tmp >= 0x100000000)
1002 return clib_error_return (0, "memory size %llx (%lld) too large",
1004 smm->configured_v4_session_table_memory = tmp;
1006 else if (unformat (input, "v4-halfopen-table-memory %U",
1007 unformat_memory_size, &tmp))
1009 if (tmp >= 0x100000000)
1010 return clib_error_return (0, "memory size %llx (%lld) too large",
1012 smm->configured_v4_halfopen_table_memory = tmp;
1014 else if (unformat (input, "v6-session-table-memory %U",
1015 unformat_memory_size, &tmp))
1017 if (tmp >= 0x100000000)
1018 return clib_error_return (0, "memory size %llx (%lld) too large",
1020 smm->configured_v6_session_table_memory = tmp;
1022 else if (unformat (input, "v6-halfopen-table-memory %U",
1023 unformat_memory_size, &tmp))
1025 if (tmp >= 0x100000000)
1026 return clib_error_return (0, "memory size %llx (%lld) too large",
1028 smm->configured_v6_halfopen_table_memory = tmp;
1031 return clib_error_return (0, "unknown input `%U'",
1032 format_unformat_error, input);
1037 VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1040 * fd.io coding-style-patch-verification: ON
1043 * eval: (c-set-style "gnu")