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.
15 #ifndef __included_session_h__
16 #define __included_session_h__
18 #include <vppinfra/llist.h>
19 #include <vnet/session/session_types.h>
20 #include <vnet/session/session_lookup.h>
21 #include <vnet/session/session_debug.h>
22 #include <svm/message_queue.h>
23 #include <svm/fifo_segment.h>
24 #include <vlib/dma/dma.h>
26 #define foreach_session_input_error \
27 _(NO_SESSION, "No session drops") \
28 _(NO_LISTENER, "No listener for dst port drops") \
29 _(ENQUEUED, "Packets pushed into rx fifo") \
30 _(NOT_READY, "Session not ready packets") \
31 _(FIFO_FULL, "Packets dropped for lack of rx fifo space") \
32 _(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") \
33 _(API_QUEUE_FULL, "Sessions not created for lack of API queue space") \
37 #define _(sym,str) SESSION_ERROR_##sym,
38 foreach_session_input_error
41 } session_input_error_t;
43 typedef struct session_wrk_stats_
45 u32 errors[SESSION_N_ERRORS];
46 } session_wrk_stats_t;
48 typedef struct session_tx_context_
50 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
52 transport_proto_vft_t *transport_vft;
53 transport_connection_t *tc;
54 transport_send_params_t sp;
58 u16 deq_per_first_buf;
63 CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
64 session_dgram_hdr_t hdr;
66 /** Vector of tx buffer free lists */
68 vlib_buffer_t **transport_pending_bufs;
69 } session_tx_context_t;
71 typedef struct session_evt_elt
73 clib_llist_anchor_t evt_list;
77 typedef struct session_ctrl_evt_data_
79 u8 data[SESSION_CTRL_MSG_MAX_SIZE];
80 } session_evt_ctrl_data_t;
82 typedef enum session_wrk_state_
85 SESSION_WRK_INTERRUPT,
87 } __clib_packed session_wrk_state_t;
89 typedef enum session_wrk_flags_
91 SESSION_WRK_F_ADAPTIVE = 1 << 0,
92 } __clib_packed session_wrk_flag_t;
94 #define DMA_TRANS_SIZE 1024
97 u32 *pending_tx_buffers;
98 u16 *pending_tx_nexts;
99 } session_dma_transfer;
101 typedef struct session_worker_
103 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
105 /** Worker session pool */
108 /** vpp event message queue for worker */
109 svm_msg_q_t *vpp_event_queue;
111 /** vlib_time_now last time around the track */
112 clib_time_type_t last_vlib_time;
114 /** vlib_time_now rounded to us precision and as u64 */
115 clib_us_time_t last_vlib_us_time;
117 /** Convenience pointer to this worker's vlib_main */
120 /** Per-proto vector of sessions to enqueue */
121 u32 **session_to_enqueue;
123 /** Timerfd used to periodically signal wrk session queue node */
127 session_wrk_flag_t flags;
130 session_wrk_state_t state;
132 /** Context for session tx */
133 session_tx_context_t ctx;
135 /** Pool of session event list elements */
136 session_evt_elt_t *event_elts;
138 /** Pool of ctrl events data buffers */
139 session_evt_ctrl_data_t *ctrl_evts_data;
141 /** Head of control events list */
142 clib_llist_index_t ctrl_head;
144 /** Head of list of elements */
145 clib_llist_index_t new_head;
147 /** Head of list of pending events */
148 clib_llist_index_t old_head;
150 /** Vector of buffers to be sent */
151 u32 *pending_tx_buffers;
153 /** Vector of nexts for the pending tx buffers */
154 u16 *pending_tx_nexts;
156 /** Clib file for timerfd. Used only if adaptive mode is on */
159 /** List of pending connects for first worker */
160 clib_llist_index_t pending_connects;
162 /** Flag that is set if main thread signaled to handle connects */
163 u32 n_pending_connects;
165 /** List head for first worker evts pending handling on main */
166 clib_llist_index_t evts_pending_main;
170 session_dma_transfer *dma_trans;
175 vlib_dma_batch_t *batch;
177 session_wrk_stats_t stats;
180 /** last event poll time by thread */
181 clib_time_type_t last_event_poll;
185 typedef int (session_fifo_rx_fn) (session_worker_t * wrk,
186 vlib_node_runtime_t * node,
187 session_evt_elt_t * e, int *n_tx_packets);
189 extern session_fifo_rx_fn session_tx_fifo_peek_and_snd;
190 extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd;
191 extern session_fifo_rx_fn session_tx_fifo_dequeue_internal;
193 u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e);
195 typedef void (*session_update_time_fn) (f64 time_now, u8 thread_index);
196 typedef void (*nat44_original_dst_lookup_fn) (
197 ip4_address_t *i2o_src, u16 i2o_src_port, ip4_address_t *i2o_dst,
198 u16 i2o_dst_port, ip_protocol_t proto, u32 *original_dst,
199 u16 *original_dst_port);
201 typedef struct session_main_
203 /** Worker contexts */
204 session_worker_t *wrk;
206 /** Vector of transport update time functions */
207 session_update_time_fn *update_time_fns;
209 /** Event queues memfd segment */
210 fifo_segment_t wrk_mqs_segment;
212 /** Unique segment name counter */
213 u32 unique_segment_name_counter;
215 /** Per transport rx function that can either dequeue or peek */
216 session_fifo_rx_fn **session_tx_fns;
218 /** Per session type output nodes. Could optimize to group nodes by
219 * fib but lookup would then require session type parsing in session node.
220 * Trade memory for speed, for now */
221 u32 *session_type_to_next;
223 /** Thread used for allocating active open connections, i.e., half-opens
224 * for transports like tcp, and sessions that will be migrated for cl
225 * transports like udp. If vpp has workers, this will be first worker. */
226 u32 transport_cl_thread;
228 transport_proto_t last_transport_proto_type;
230 /** Number of workers at pool realloc barrier */
231 volatile u32 pool_realloc_at_barrier;
233 /** Number of workers doing reallocs */
234 volatile u32 pool_realloc_doing_work;
236 /** Lock to synchronize parallel forced reallocs */
237 clib_spinlock_t pool_realloc_lock;
243 /** Session manager is enabled */
246 /** Session manager initialized (not necessarily enabled) */
249 /** Enable session manager at startup */
250 u8 session_enable_asap;
252 /** Poll session node in main thread */
255 /** Allocate private rx mqs for external apps */
256 u8 use_private_rx_mqs;
258 /** Do not enable session queue node adaptive mode */
261 /** vpp fifo event queue configured length */
262 u32 configured_wrk_mq_length;
264 /** Session ssvm segment configs*/
265 uword wrk_mqs_segment_size;
267 /** Session enable dma*/
270 /** Session table size parameters */
271 u32 configured_v4_session_table_buckets;
272 u32 configured_v4_session_table_memory;
273 u32 configured_v4_halfopen_table_buckets;
274 u32 configured_v4_halfopen_table_memory;
275 u32 configured_v6_session_table_buckets;
276 u32 configured_v6_session_table_memory;
277 u32 configured_v6_halfopen_table_buckets;
278 u32 configured_v6_halfopen_table_memory;
280 /** Transport table (preallocation) size parameters */
281 u32 local_endpoints_table_memory;
282 u32 local_endpoints_table_buckets;
284 /** Preallocate session config parameter */
285 u32 preallocated_sessions;
289 /** Query nat44-ed session to get original dst ip4 & dst port. */
290 nat44_original_dst_lookup_fn original_dst_lookup;
293 extern session_main_t session_main;
294 extern vlib_node_registration_t session_queue_node;
295 extern vlib_node_registration_t session_queue_process_node;
296 extern vlib_node_registration_t session_queue_pre_input_node;
298 typedef enum session_q_process_evt_
300 SESSION_Q_PROCESS_RUN_ON_MAIN = 1,
301 SESSION_Q_PROCESS_STOP
302 } session_q_process_evt_t;
304 #define TRANSPORT_PROTO_INVALID (session_main.last_transport_proto_type + 1)
305 #define TRANSPORT_N_PROTOS (session_main.last_transport_proto_type + 1)
308 session_evt_add_old (session_worker_t * wrk, session_evt_elt_t * elt)
310 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
311 clib_llist_elt (wrk->event_elts, wrk->old_head));
315 session_evt_add_head_old (session_worker_t * wrk, session_evt_elt_t * elt)
317 clib_llist_add (wrk->event_elts, evt_list, elt,
318 clib_llist_elt (wrk->event_elts, wrk->old_head));
323 session_evt_ctrl_data_alloc (session_worker_t * wrk)
325 session_evt_ctrl_data_t *data;
326 pool_get (wrk->ctrl_evts_data, data);
327 return (data - wrk->ctrl_evts_data);
330 static inline session_evt_elt_t *
331 session_evt_alloc_ctrl (session_worker_t * wrk)
333 session_evt_elt_t *elt;
334 clib_llist_get (wrk->event_elts, elt);
335 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
336 clib_llist_elt (wrk->event_elts, wrk->ctrl_head));
341 session_evt_ctrl_data (session_worker_t * wrk, session_evt_elt_t * elt)
343 return (void *) (pool_elt_at_index (wrk->ctrl_evts_data,
344 elt->evt.ctrl_data_index));
348 session_evt_ctrl_data_free (session_worker_t * wrk, session_evt_elt_t * elt)
350 ASSERT (elt->evt.event_type >= SESSION_CTRL_EVT_RPC);
351 pool_put_index (wrk->ctrl_evts_data, elt->evt.ctrl_data_index);
354 static inline session_evt_elt_t *
355 session_evt_alloc_new (session_worker_t * wrk)
357 session_evt_elt_t *elt;
358 clib_llist_get (wrk->event_elts, elt);
359 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
360 clib_llist_elt (wrk->event_elts, wrk->new_head));
364 static inline session_evt_elt_t *
365 session_evt_alloc_old (session_worker_t * wrk)
367 session_evt_elt_t *elt;
368 clib_llist_get (wrk->event_elts, elt);
369 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
370 clib_llist_elt (wrk->event_elts, wrk->old_head));
374 int session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq);
376 session_t *session_alloc (u32 thread_index);
377 void session_free (session_t * s);
378 void session_free_w_fifos (session_t * s);
379 void session_cleanup_half_open (session_handle_t ho_handle);
380 u8 session_is_valid (u32 si, u8 thread_index);
382 always_inline session_t *
383 session_get (u32 si, u32 thread_index)
385 ASSERT (session_is_valid (si, thread_index));
386 return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
389 always_inline session_t *
390 session_get_if_valid (u64 si, u32 thread_index)
392 if (thread_index >= vec_len (session_main.wrk))
395 if (pool_is_free_index (session_main.wrk[thread_index].sessions, si))
398 ASSERT (session_is_valid (si, thread_index));
399 return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
402 always_inline session_t *
403 session_get_from_handle (session_handle_t handle)
405 session_main_t *smm = &session_main;
406 u32 session_index, thread_index;
407 session_parse_handle (handle, &session_index, &thread_index);
408 return pool_elt_at_index (smm->wrk[thread_index].sessions, session_index);
411 always_inline session_t *
412 session_get_from_handle_if_valid (session_handle_t handle)
414 u32 session_index, thread_index;
415 session_parse_handle (handle, &session_index, &thread_index);
416 return session_get_if_valid (session_index, thread_index);
419 u64 session_segment_handle (session_t * s);
422 * Get session from handle and avoid pool validation if no same thread
424 * Peekers are fine because pool grows with barrier (see @ref session_alloc)
426 always_inline session_t *
427 session_get_from_handle_safe (u64 handle)
429 u32 thread_index = session_thread_from_handle (handle);
430 session_worker_t *wrk = &session_main.wrk[thread_index];
432 if (thread_index == vlib_get_thread_index ())
434 return pool_elt_at_index (wrk->sessions,
435 session_index_from_handle (handle));
439 /* Don't use pool_elt_at index to avoid pool bitmap reallocs */
440 return wrk->sessions + session_index_from_handle (handle);
444 always_inline session_t *
445 session_clone_safe (u32 session_index, u32 thread_index)
447 u32 current_thread_index = vlib_get_thread_index (), new_index;
448 session_t *old_s, *new_s;
450 new_s = session_alloc (current_thread_index);
451 new_index = new_s->session_index;
452 /* Session pools are reallocated with barrier (see @ref session_alloc) */
453 old_s = session_main.wrk[thread_index].sessions + session_index;
454 clib_memcpy_fast (new_s, old_s, sizeof (*new_s));
455 new_s->thread_index = current_thread_index;
456 new_s->session_index = new_index;
460 int session_open (session_endpoint_cfg_t *sep, session_handle_t *rsh);
461 int session_listen (session_t * s, session_endpoint_cfg_t * sep);
462 int session_stop_listen (session_t * s);
463 void session_half_close (session_t *s);
464 void session_close (session_t * s);
465 void session_reset (session_t * s);
466 void session_transport_half_close (session_t *s);
467 void session_transport_close (session_t * s);
468 void session_transport_reset (session_t * s);
469 void session_transport_cleanup (session_t * s);
470 int session_send_io_evt_to_thread (svm_fifo_t * f,
471 session_evt_type_t evt_type);
472 int session_enqueue_notify (session_t * s);
473 int session_dequeue_notify (session_t * s);
474 int session_send_io_evt_to_thread_custom (void *data, u32 thread_index,
475 session_evt_type_t evt_type);
476 void session_send_rpc_evt_to_thread (u32 thread_index, void *fp,
478 void session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp,
480 void session_add_self_custom_tx_evt (transport_connection_t * tc,
482 void sesssion_reschedule_tx (transport_connection_t * tc);
483 transport_connection_t *session_get_transport (session_t * s);
484 void session_get_endpoint (session_t * s, transport_endpoint_t * tep,
486 int session_transport_attribute (session_t *s, u8 is_get,
487 transport_endpt_attr_t *attr);
489 u8 *format_session (u8 * s, va_list * args);
490 uword unformat_session (unformat_input_t * input, va_list * args);
491 uword unformat_transport_connection (unformat_input_t * input,
495 * Interface to transport protos
498 int session_enqueue_stream_connection (transport_connection_t * tc,
499 vlib_buffer_t * b, u32 offset,
500 u8 queue_event, u8 is_in_order);
501 int session_enqueue_dgram_connection (session_t * s,
502 session_dgram_hdr_t * hdr,
503 vlib_buffer_t * b, u8 proto,
505 int session_stream_connect_notify (transport_connection_t * tc,
506 session_error_t err);
507 int session_dgram_connect_notify (transport_connection_t * tc,
508 u32 old_thread_index,
509 session_t ** new_session);
510 int session_stream_accept_notify (transport_connection_t * tc);
511 void session_transport_closing_notify (transport_connection_t * tc);
512 void session_transport_delete_notify (transport_connection_t * tc);
513 void session_half_open_delete_notify (transport_connection_t *tc);
514 void session_half_open_migrate_notify (transport_connection_t *tc);
515 int session_half_open_migrated_notify (transport_connection_t *tc);
516 void session_transport_closed_notify (transport_connection_t * tc);
517 void session_transport_reset_notify (transport_connection_t * tc);
518 int session_stream_accept (transport_connection_t * tc, u32 listener_index,
519 u32 thread_index, u8 notify);
520 int session_dgram_accept (transport_connection_t * tc, u32 listener_index,
523 * Initialize session layer for given transport proto and ip version
525 * Allocates per session type (transport proto + ip version) data structures
526 * and adds arc from session queue node to session type output node.
528 * @param transport_proto transport proto to be registered
529 * @param vft virtual function table for transport
530 * @param is_ip4 flag that indicates if transports uses ipv4
531 * as underlying network layer
532 * @param output_node output node for transport
534 void session_register_transport (transport_proto_t transport_proto,
535 const transport_proto_vft_t * vft, u8 is_ip4,
537 transport_proto_t session_add_transport_proto (void);
538 void session_register_update_time_fn (session_update_time_fn fn, u8 is_add);
539 int session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
540 u32 offset, u32 max_bytes);
541 u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes);
544 session_set_state (session_t *s, session_state_t session_state)
546 s->session_state = session_state;
547 SESSION_EVT (SESSION_EVT_STATE_CHANGE, s);
551 transport_max_rx_enqueue (transport_connection_t * tc)
553 session_t *s = session_get (tc->s_index, tc->thread_index);
554 return svm_fifo_max_enqueue_prod (s->rx_fifo);
558 transport_max_tx_dequeue (transport_connection_t * tc)
560 session_t *s = session_get (tc->s_index, tc->thread_index);
561 return svm_fifo_max_dequeue_cons (s->tx_fifo);
565 transport_max_rx_dequeue (transport_connection_t * tc)
567 session_t *s = session_get (tc->s_index, tc->thread_index);
568 return svm_fifo_max_dequeue (s->rx_fifo);
572 transport_rx_fifo_size (transport_connection_t * tc)
574 session_t *s = session_get (tc->s_index, tc->thread_index);
575 return svm_fifo_size (s->rx_fifo);
579 transport_tx_fifo_size (transport_connection_t * tc)
581 session_t *s = session_get (tc->s_index, tc->thread_index);
582 return svm_fifo_size (s->tx_fifo);
586 transport_rx_fifo_has_ooo_data (transport_connection_t * tc)
588 session_t *s = session_get (tc->c_index, tc->thread_index);
589 return svm_fifo_has_ooo_data (s->rx_fifo);
593 transport_tx_fifo_has_dgram (transport_connection_t *tc)
595 session_t *s = session_get (tc->s_index, tc->thread_index);
596 u32 max_deq = svm_fifo_max_dequeue_cons (s->tx_fifo);
597 session_dgram_pre_hdr_t phdr;
599 if (max_deq <= sizeof (session_dgram_hdr_t))
601 svm_fifo_peek (s->tx_fifo, 0, sizeof (phdr), (u8 *) &phdr);
602 return max_deq >= phdr.data_length + sizeof (session_dgram_hdr_t);
606 transport_rx_fifo_req_deq_ntf (transport_connection_t *tc)
608 session_t *s = session_get (tc->s_index, tc->thread_index);
609 svm_fifo_add_want_deq_ntf (s->rx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
612 always_inline clib_time_type_t
613 transport_time_now (u32 thread_index)
615 return session_main.wrk[thread_index].last_vlib_time;
618 always_inline clib_us_time_t
619 transport_us_time_now (u32 thread_index)
621 return session_main.wrk[thread_index].last_vlib_us_time;
624 always_inline clib_time_type_t
625 transport_seconds_per_loop (u32 thread_index)
627 return session_main.wrk[thread_index].vm->seconds_per_loop;
631 transport_add_tx_event (transport_connection_t * tc)
633 session_t *s = session_get (tc->s_index, tc->thread_index);
634 if (svm_fifo_has_event (s->tx_fifo))
636 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
640 transport_cl_thread (void)
642 return session_main.transport_cl_thread;
646 session_vlib_thread_is_cl_thread (void)
648 return (vlib_get_thread_index () == transport_cl_thread () ||
649 vlib_thread_is_main_w_barrier ());
657 listen_session_get_handle (session_t * s)
659 ASSERT (s->session_state == SESSION_STATE_LISTENING ||
660 session_get_transport_proto (s) == TRANSPORT_PROTO_QUIC);
661 return session_handle (s);
664 always_inline session_t *
665 listen_session_get_from_handle (session_handle_t handle)
667 return session_get_from_handle (handle);
671 listen_session_parse_handle (session_handle_t handle, u32 * index,
674 session_parse_handle (handle, index, thread_index);
677 always_inline session_t *
678 listen_session_alloc (u8 thread_index, session_type_t type)
681 s = session_alloc (thread_index);
682 s->session_type = type;
683 s->session_state = SESSION_STATE_LISTENING;
687 always_inline session_t *
688 listen_session_get (u32 ls_index)
690 return session_get (ls_index, 0);
694 listen_session_free (session_t * s)
696 ASSERT (!s->rx_fifo);
700 always_inline session_t *
701 ho_session_alloc (void)
704 ASSERT (session_vlib_thread_is_cl_thread ());
705 s = session_alloc (transport_cl_thread ());
706 s->session_state = SESSION_STATE_CONNECTING;
707 s->flags |= SESSION_F_HALF_OPEN;
711 always_inline session_t *
712 ho_session_get (u32 ho_index)
714 return session_get (ho_index, transport_cl_thread ());
718 ho_session_free (session_t *s)
720 ASSERT (!s->rx_fifo && s->thread_index == 0);
724 transport_connection_t *listen_session_get_transport (session_t * s);
727 * Session layer functions
730 always_inline session_main_t *
731 vnet_get_session_main ()
733 return &session_main;
736 always_inline session_worker_t *
737 session_main_get_worker (u32 thread_index)
739 return vec_elt_at_index (session_main.wrk, thread_index);
742 static inline session_worker_t *
743 session_main_get_worker_if_valid (u32 thread_index)
745 if (thread_index > vec_len (session_main.wrk))
747 return session_main_get_worker (thread_index);
750 always_inline svm_msg_q_t *
751 session_main_get_vpp_event_queue (u32 thread_index)
753 return session_main_get_worker (thread_index)->vpp_event_queue;
757 session_main_is_enabled ()
759 return session_main.is_enabled == 1;
763 session_worker_stat_error_inc (session_worker_t *wrk, int error, int value)
765 if ((-(error) >= 0 && -(error) < SESSION_N_ERRORS))
766 wrk->stats.errors[-error] += value;
768 SESSION_DBG ("unknown session counter");
772 session_stat_error_inc (int error, int value)
774 session_worker_t *wrk;
775 wrk = session_main_get_worker (vlib_get_thread_index ());
776 session_worker_stat_error_inc (wrk, error, value);
779 #define session_cli_return_if_not_enabled() \
781 if (!session_main.is_enabled) \
782 return clib_error_return (0, "session layer is not enabled"); \
785 int session_main_flush_enqueue_events (u8 proto, u32 thread_index);
786 int session_main_flush_all_enqueue_events (u8 transport_proto);
787 void session_queue_run_on_main_thread (vlib_main_t * vm);
790 * Add session node pending buffer with custom node
792 * @param thread_index worker thread expected to send the buffer
793 * @param bi buffer index
794 * @param next_node next node edge index for buffer. Edge to next node
798 session_add_pending_tx_buffer (u32 thread_index, u32 bi, u32 next_node)
800 session_worker_t *wrk = session_main_get_worker (thread_index);
801 vec_add1 (wrk->pending_tx_buffers, bi);
802 vec_add1 (wrk->pending_tx_nexts, next_node);
803 if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
804 vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
808 session_wrk_update_time (session_worker_t *wrk, f64 now)
810 wrk->last_vlib_time = now;
811 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
814 void session_wrk_enable_adaptive_mode (session_worker_t *wrk);
815 fifo_segment_t *session_main_get_wrk_mqs_segment (void);
816 void session_node_enable_disable (u8 is_en);
817 clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);
818 void session_wrk_handle_evts_main_rpc (void *);
820 session_t *session_alloc_for_connection (transport_connection_t * tc);
821 session_t *session_alloc_for_half_open (transport_connection_t *tc);
822 void session_get_original_dst (transport_endpoint_t *i2o_src,
823 transport_endpoint_t *i2o_dst,
824 transport_proto_t transport_proto,
825 u32 *original_dst, u16 *original_dst_port);
827 typedef void (pool_safe_realloc_rpc_fn) (void *rpc_args);
831 u8 ph[STRUCT_OFFSET_OF (pool_header_t, max_elts) + 4];
833 } pool_safe_realloc_header_t;
835 STATIC_ASSERT_SIZEOF (pool_safe_realloc_header_t, sizeof (pool_header_t));
837 #define POOL_REALLOC_SAFE_ELT_THRESH 32
839 #define pool_realloc_flag(PH) \
840 ((pool_safe_realloc_header_t *) pool_header (PH))->flag
842 typedef struct pool_realloc_rpc_args_
847 } pool_realloc_rpc_args_t;
850 pool_program_safe_realloc_rpc (void *args)
852 vlib_main_t *vm = vlib_get_main ();
853 u32 free_elts, max_elts, n_alloc;
854 pool_realloc_rpc_args_t *pra;
856 ASSERT (vlib_get_thread_index () == 0);
857 pra = (pool_realloc_rpc_args_t *) args;
859 vlib_worker_thread_barrier_sync (vm);
861 free_elts = _pool_free_elts (*pra->pool, pra->elt_size);
862 if (free_elts < POOL_REALLOC_SAFE_ELT_THRESH)
864 max_elts = _vec_max_len (*pra->pool, pra->elt_size);
865 n_alloc = clib_max (2 * max_elts, POOL_REALLOC_SAFE_ELT_THRESH);
866 _pool_alloc (pra->pool, n_alloc, pra->align, 0, pra->elt_size);
868 pool_realloc_flag (*pra->pool) = 0;
869 clib_mem_free (args);
871 vlib_worker_thread_barrier_release (vm);
875 pool_program_safe_realloc (void **p, u32 elt_size, u32 align)
877 pool_realloc_rpc_args_t *pra;
879 /* Reuse pad as a realloc flag */
880 if (pool_realloc_flag (*p))
883 pra = clib_mem_alloc (sizeof (*pra));
885 pra->elt_size = elt_size;
887 pool_realloc_flag (*p) = 1;
889 session_send_rpc_evt_to_thread (0 /* thread index */,
890 pool_program_safe_realloc_rpc, pra);
893 #define pool_needs_realloc(P) \
895 (vec_len (pool_header (P)->free_indices) < POOL_REALLOC_SAFE_ELT_THRESH && \
896 pool_free_elts (P) < POOL_REALLOC_SAFE_ELT_THRESH))
898 #define pool_get_aligned_safe(P, E, align) \
901 if (PREDICT_FALSE (pool_needs_realloc (P))) \
903 if (PREDICT_FALSE (!(P))) \
905 pool_alloc_aligned (P, POOL_REALLOC_SAFE_ELT_THRESH, align); \
907 else if (PREDICT_FALSE (!pool_free_elts (P))) \
909 vlib_workers_sync (); \
910 pool_alloc_aligned (P, pool_max_len (P), align); \
911 vlib_workers_continue (); \
912 ALWAYS_ASSERT (pool_free_elts (P) > 0); \
916 pool_program_safe_realloc ((void **) &(P), sizeof ((P)[0]), \
917 _vec_align (P, align)); \
920 pool_get_aligned (P, E, align); \
924 #endif /* __included_session_h__ */
927 * fd.io coding-style-patch-verification: ON
930 * eval: (c-set-style "gnu")