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_if_valid (handle >> 32);
464 opaque = tc->s_index;
468 segment_manager_t *sm;
470 sm = application_get_connect_segment_manager (app);
471 alloc_fifos = application_is_proxy (app);
472 /* Create new session (svm segments are allocated if needed) */
473 if (stream_session_create_i (sm, tc, alloc_fifos, &new_s))
479 new_s->app_index = app->index;
482 /* Notify client application */
483 if (app->cb_fns.session_connected_callback (app->index, opaque, new_s,
486 clib_warning ("failed to notify app");
488 stream_session_disconnect (new_s);
493 new_s->session_state = SESSION_STATE_READY;
496 /* Cleanup session lookup */
497 stream_session_half_open_table_del (tc);
503 stream_session_accept_notify (transport_connection_t * tc)
505 application_t *server;
508 s = stream_session_get (tc->s_index, tc->thread_index);
509 server = application_get (s->app_index);
510 server->cb_fns.session_accept_callback (s);
514 * Notification from transport that connection is being closed.
516 * A disconnect is sent to application but state is not removed. Once
517 * disconnect is acknowledged by application, session disconnect is called.
518 * Ultimately this leads to close being called on transport (passive close).
521 stream_session_disconnect_notify (transport_connection_t * tc)
523 application_t *server;
526 s = stream_session_get (tc->s_index, tc->thread_index);
527 server = application_get (s->app_index);
528 server->cb_fns.session_disconnect_callback (s);
532 * Cleans up session and associated app if needed.
535 stream_session_delete (stream_session_t * s)
537 session_manager_main_t *smm = vnet_get_session_manager_main ();
540 /* Delete from the main lookup table. */
541 if ((rv = stream_session_table_del (s)))
542 clib_warning ("hash delete error, rv %d", rv);
544 /* Cleanup fifo segments */
545 segment_manager_dealloc_fifos (s->svm_segment_index, s->server_rx_fifo,
548 pool_put (smm->sessions[s->thread_index], s);
550 memset (s, 0xFA, sizeof (*s));
554 * Notification from transport that connection is being deleted
556 * This should be called only on previously fully established sessions. For
557 * instance failed connects should call stream_session_connect_notify and
558 * indicate that the connect has failed.
561 stream_session_delete_notify (transport_connection_t * tc)
565 /* App might've been removed already */
566 s = stream_session_get_if_valid (tc->s_index, tc->thread_index);
569 stream_session_delete (s);
573 * Notify application that connection has been reset.
576 stream_session_reset_notify (transport_connection_t * tc)
580 s = stream_session_get (tc->s_index, tc->thread_index);
582 app = application_get (s->app_index);
583 app->cb_fns.session_reset_callback (s);
587 * Accept a stream session. Optionally ping the server by callback.
590 stream_session_accept (transport_connection_t * tc, u32 listener_index,
593 application_t *server;
594 stream_session_t *s, *listener;
595 segment_manager_t *sm;
599 /* Find the server */
600 listener = listen_session_get (sst, listener_index);
601 server = application_get (listener->app_index);
603 sm = application_get_listen_segment_manager (server, listener);
604 if ((rv = stream_session_create_i (sm, tc, 1, &s)))
607 s->app_index = server->index;
608 s->listener_index = listener_index;
609 s->session_state = SESSION_STATE_ACCEPTING;
611 /* Shoulder-tap the server */
614 server->cb_fns.session_accept_callback (s);
621 * Ask transport to open connection to remote transport endpoint.
623 * Stores handle for matching request with reply since the call can be
624 * asynchronous. For instance, for TCP the 3-way handshake must complete
625 * before reply comes. Session is only created once connection is established.
627 * @param app_index Index of the application requesting the connect
628 * @param st Session type requested.
629 * @param tep Remote transport endpoint
630 * @param res Resulting transport connection .
633 stream_session_open (u32 app_index, session_type_t st,
634 transport_endpoint_t * rmt,
635 transport_connection_t ** res)
637 transport_connection_t *tc;
641 rv = tp_vfts[st].open (rmt);
644 clib_warning ("Transport failed to open connection.");
645 return VNET_API_ERROR_SESSION_CONNECT_FAIL;
648 tc = tp_vfts[st].get_half_open ((u32) rv);
650 /* Save app and tc index. The latter is needed to help establish the
651 * connection while the former is needed when the connect notify comes
652 * and we have to notify the external app */
653 handle = (((u64) app_index) << 32) | (u64) tc->c_index;
655 /* Add to the half-open lookup table */
656 stream_session_half_open_table_add (tc, handle);
664 * Ask transport to listen on local transport endpoint.
666 * @param s Session for which listen will be called. Note that unlike
667 * established sessions, listen sessions are not associated to a
669 * @param tep Local endpoint to be listened on.
672 stream_session_listen (stream_session_t * s, transport_endpoint_t * tep)
674 transport_connection_t *tc;
677 /* Transport bind/listen */
678 tci = tp_vfts[s->session_type].bind (s->session_index, tep);
680 if (tci == (u32) ~ 0)
683 /* Attach transport to session */
684 s->connection_index = tci;
685 tc = tp_vfts[s->session_type].get_listener (tci);
687 /* Weird but handle it ... */
691 /* Add to the main lookup table */
692 stream_session_table_add_for_tc (tc, s->session_index);
698 * Ask transport to stop listening on local transport endpoint.
700 * @param s Session to stop listening on. It must be in state LISTENING.
703 stream_session_stop_listen (stream_session_t * s)
705 transport_connection_t *tc;
707 if (s->session_state != SESSION_STATE_LISTENING)
709 clib_warning ("not a listening session");
713 tc = tp_vfts[s->session_type].get_listener (s->connection_index);
716 clib_warning ("no transport");
717 return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
720 stream_session_table_del_for_tc (tc);
721 tp_vfts[s->session_type].unbind (s->connection_index);
726 session_send_session_evt_to_thread (u64 session_handle,
727 fifo_event_type_t evt_type,
730 static u16 serial_number = 0;
731 session_fifo_event_t evt;
732 unix_shared_memory_queue_t *q;
734 /* Fabricate event */
735 evt.session_handle = session_handle;
736 evt.event_type = evt_type;
737 evt.event_id = serial_number++;
739 q = session_manager_get_vpp_event_queue (thread_index);
741 /* Based on request block (or not) for lack of space */
742 if (PREDICT_TRUE (q->cursize < q->maxsize))
744 if (unix_shared_memory_queue_add (q, (u8 *) & evt,
745 1 /* do wait for mutex */ ))
747 clib_warning ("failed to enqueue evt");
752 clib_warning ("queue full");
758 * Disconnect session and propagate to transport. This should eventually
759 * result in a delete notification that allows us to cleanup session state.
760 * Called for both active/passive disconnects.
762 * Should be called from the session's thread.
765 stream_session_disconnect (stream_session_t * s)
767 s->session_state = SESSION_STATE_CLOSED;
768 tp_vfts[s->session_type].close (s->connection_index, s->thread_index);
772 * Cleanup transport and session state.
774 * Notify transport of the cleanup, wait for a delete notify to actually
775 * remove the session state.
778 stream_session_cleanup (stream_session_t * s)
782 s->session_state = SESSION_STATE_CLOSED;
784 /* Delete from the main lookup table to avoid more enqueues */
785 rv = stream_session_table_del (s);
787 clib_warning ("hash delete error, rv %d", rv);
789 tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index);
793 * Allocate vpp event queue (once) per worker thread
796 session_vpp_event_queue_allocate (session_manager_main_t * smm,
799 api_main_t *am = &api_main;
801 u32 event_queue_length = 2048;
803 if (smm->vpp_event_queues[thread_index] == 0)
805 /* Allocate event fifo in the /vpe-api shared-memory segment */
806 oldheap = svm_push_data_heap (am->vlib_rp);
808 if (smm->configured_event_queue_length)
809 event_queue_length = smm->configured_event_queue_length;
811 smm->vpp_event_queues[thread_index] =
812 unix_shared_memory_queue_init
814 sizeof (session_fifo_event_t), 0 /* consumer pid */ ,
815 0 /* (do not) send signal when queue non-empty */ );
817 svm_pop_heap (oldheap);
822 session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4)
824 if (proto == TRANSPORT_PROTO_TCP)
827 return SESSION_TYPE_IP4_TCP;
829 return SESSION_TYPE_IP6_TCP;
834 return SESSION_TYPE_IP4_UDP;
836 return SESSION_TYPE_IP6_UDP;
839 return SESSION_N_TYPES;
842 static clib_error_t *
843 session_manager_main_enable (vlib_main_t * vm)
845 session_manager_main_t *smm = &session_manager_main;
846 vlib_thread_main_t *vtm = vlib_get_thread_main ();
848 u32 preallocated_sessions_per_worker;
851 num_threads = 1 /* main thread */ + vtm->n_threads;
854 return clib_error_return (0, "n_thread_stacks not set");
856 /* $$$ config parameters */
857 svm_fifo_segment_init (0x200000000ULL /* first segment base VA */ ,
858 20 /* timeout in seconds */ );
860 /* configure per-thread ** vectors */
861 vec_validate (smm->sessions, num_threads - 1);
862 vec_validate (smm->session_indices_to_enqueue_by_thread, num_threads - 1);
863 vec_validate (smm->tx_buffers, num_threads - 1);
864 vec_validate (smm->pending_event_vector, num_threads - 1);
865 vec_validate (smm->free_event_vector, num_threads - 1);
866 vec_validate (smm->current_enqueue_epoch, num_threads - 1);
867 vec_validate (smm->vpp_event_queues, num_threads - 1);
869 for (i = 0; i < num_threads; i++)
871 vec_validate (smm->free_event_vector[i], 0);
872 _vec_len (smm->free_event_vector[i]) = 0;
873 vec_validate (smm->pending_event_vector[i], 0);
874 _vec_len (smm->pending_event_vector[i]) = 0;
878 vec_validate (smm->last_event_poll_by_thread, num_threads - 1);
881 /* Allocate vpp event queues */
882 for (i = 0; i < vec_len (smm->vpp_event_queues); i++)
883 session_vpp_event_queue_allocate (smm, i);
885 /* Preallocate sessions */
886 if (num_threads == 1)
888 for (i = 0; i < smm->preallocated_sessions; i++)
890 stream_session_t *ss __attribute__ ((unused));
891 pool_get_aligned (smm->sessions[0], ss, CLIB_CACHE_LINE_BYTES);
894 for (i = 0; i < smm->preallocated_sessions; i++)
895 pool_put_index (smm->sessions[0], i);
900 preallocated_sessions_per_worker = smm->preallocated_sessions /
903 for (j = 1; j < num_threads; j++)
905 for (i = 0; i < preallocated_sessions_per_worker; i++)
907 stream_session_t *ss __attribute__ ((unused));
908 pool_get_aligned (smm->sessions[j], ss, CLIB_CACHE_LINE_BYTES);
910 for (i = 0; i < preallocated_sessions_per_worker; i++)
911 pool_put_index (smm->sessions[j], i);
915 session_lookup_init ();
919 /* Enable TCP transport */
920 vnet_tcp_enable_disable (vm, 1);
926 session_node_enable_disable (u8 is_en)
928 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
930 foreach_vlib_main (({
931 vlib_node_set_state (this_vlib_main, session_queue_node.index,
938 vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
942 if (session_manager_main.is_enabled)
945 session_node_enable_disable (is_en);
947 return session_manager_main_enable (vm);
951 session_manager_main.is_enabled = 0;
952 session_node_enable_disable (is_en);
959 session_manager_main_init (vlib_main_t * vm)
961 session_manager_main_t *smm = &session_manager_main;
966 VLIB_INIT_FUNCTION (session_manager_main_init);
968 static clib_error_t *
969 session_config_fn (vlib_main_t * vm, unformat_input_t * input)
971 session_manager_main_t *smm = &session_manager_main;
975 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
977 if (unformat (input, "event-queue-length %d", &nitems))
980 smm->configured_event_queue_length = nitems;
982 clib_warning ("event queue length %d too small, ignored", nitems);
984 else if (unformat (input, "preallocated-sessions %d",
985 &smm->preallocated_sessions))
987 else if (unformat (input, "v4-session-table-buckets %d",
988 &smm->configured_v4_session_table_buckets))
990 else if (unformat (input, "v4-halfopen-table-buckets %d",
991 &smm->configured_v4_halfopen_table_buckets))
993 else if (unformat (input, "v6-session-table-buckets %d",
994 &smm->configured_v6_session_table_buckets))
996 else if (unformat (input, "v6-halfopen-table-buckets %d",
997 &smm->configured_v6_halfopen_table_buckets))
999 else if (unformat (input, "v4-session-table-memory %U",
1000 unformat_memory_size, &tmp))
1002 if (tmp >= 0x100000000)
1003 return clib_error_return (0, "memory size %llx (%lld) too large",
1005 smm->configured_v4_session_table_memory = tmp;
1007 else if (unformat (input, "v4-halfopen-table-memory %U",
1008 unformat_memory_size, &tmp))
1010 if (tmp >= 0x100000000)
1011 return clib_error_return (0, "memory size %llx (%lld) too large",
1013 smm->configured_v4_halfopen_table_memory = tmp;
1015 else if (unformat (input, "v6-session-table-memory %U",
1016 unformat_memory_size, &tmp))
1018 if (tmp >= 0x100000000)
1019 return clib_error_return (0, "memory size %llx (%lld) too large",
1021 smm->configured_v6_session_table_memory = tmp;
1023 else if (unformat (input, "v6-halfopen-table-memory %U",
1024 unformat_memory_size, &tmp))
1026 if (tmp >= 0x100000000)
1027 return clib_error_return (0, "memory size %llx (%lld) too large",
1029 smm->configured_v6_halfopen_table_memory = tmp;
1032 return clib_error_return (0, "unknown input `%U'",
1033 format_unformat_error, input);
1038 VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1041 * fd.io coding-style-patch-verification: ON
1044 * eval: (c-set-style "gnu")