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 typedef struct session_wrk_stats_
28 u32 errors[SESSION_N_ERRORS];
29 } session_wrk_stats_t;
31 typedef struct session_tx_context_
33 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
35 transport_proto_vft_t *transport_vft;
36 transport_connection_t *tc;
37 transport_send_params_t sp;
41 u16 deq_per_first_buf;
46 CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
47 session_dgram_hdr_t hdr;
49 /** Vector of tx buffer free lists */
51 vlib_buffer_t **transport_pending_bufs;
52 } session_tx_context_t;
54 typedef struct session_evt_elt
56 clib_llist_anchor_t evt_list;
60 typedef struct session_ctrl_evt_data_
62 u8 data[SESSION_CTRL_MSG_MAX_SIZE];
63 } session_evt_ctrl_data_t;
65 typedef enum session_wrk_state_
68 SESSION_WRK_INTERRUPT,
70 } __clib_packed session_wrk_state_t;
72 typedef enum session_wrk_flags_
74 SESSION_WRK_F_ADAPTIVE = 1 << 0,
75 } __clib_packed session_wrk_flag_t;
77 #define DMA_TRANS_SIZE 1024
80 u32 *pending_tx_buffers;
81 u16 *pending_tx_nexts;
82 } session_dma_transfer;
84 typedef struct session_worker_
86 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
88 /** Worker session pool */
91 /** vpp event message queue for worker */
92 svm_msg_q_t *vpp_event_queue;
94 /** vlib_time_now last time around the track */
95 clib_time_type_t last_vlib_time;
97 /** vlib_time_now rounded to us precision and as u64 */
98 clib_us_time_t last_vlib_us_time;
100 /** Convenience pointer to this worker's vlib_main */
103 /** Per-proto vector of session handles to enqueue */
104 session_handle_t **session_to_enqueue;
106 /** Timerfd used to periodically signal wrk session queue node */
110 session_wrk_flag_t flags;
113 session_wrk_state_t state;
115 /** Context for session tx */
116 session_tx_context_t ctx;
118 /** Pool of session event list elements */
119 session_evt_elt_t *event_elts;
121 /** Pool of ctrl events data buffers */
122 session_evt_ctrl_data_t *ctrl_evts_data;
124 /** Head of control events list */
125 clib_llist_index_t ctrl_head;
127 /** Head of list of elements */
128 clib_llist_index_t new_head;
130 /** Head of list of pending events */
131 clib_llist_index_t old_head;
133 /** Vector of buffers to be sent */
134 u32 *pending_tx_buffers;
136 /** Vector of nexts for the pending tx buffers */
137 u16 *pending_tx_nexts;
139 /** Clib file for timerfd. Used only if adaptive mode is on */
142 /** List of pending connects for first worker */
143 clib_llist_index_t pending_connects;
145 /** Flag that is set if main thread signaled to handle connects */
146 u32 n_pending_connects;
148 /** List head for first worker evts pending handling on main */
149 clib_llist_index_t evts_pending_main;
151 /** Per-app-worker bitmap of pending notifications */
152 uword *app_wrks_pending_ntf;
156 session_dma_transfer *dma_trans;
161 vlib_dma_batch_t *batch;
163 session_wrk_stats_t stats;
166 /** last event poll time by thread */
167 clib_time_type_t last_event_poll;
171 typedef int (session_fifo_rx_fn) (session_worker_t * wrk,
172 vlib_node_runtime_t * node,
173 session_evt_elt_t * e, int *n_tx_packets);
175 extern session_fifo_rx_fn session_tx_fifo_peek_and_snd;
176 extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd;
177 extern session_fifo_rx_fn session_tx_fifo_dequeue_internal;
179 u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e);
181 typedef void (*session_update_time_fn) (f64 time_now, u8 thread_index);
182 typedef void (*nat44_original_dst_lookup_fn) (
183 ip4_address_t *i2o_src, u16 i2o_src_port, ip4_address_t *i2o_dst,
184 u16 i2o_dst_port, ip_protocol_t proto, u32 *original_dst,
185 u16 *original_dst_port);
187 typedef struct session_main_
189 /** Worker contexts */
190 session_worker_t *wrk;
192 /** Vector of transport update time functions */
193 session_update_time_fn *update_time_fns;
195 /** Event queues memfd segment */
196 fifo_segment_t wrk_mqs_segment;
198 /** Unique segment name counter */
199 u32 unique_segment_name_counter;
201 /** Per transport rx function that can either dequeue or peek */
202 session_fifo_rx_fn **session_tx_fns;
204 /** Per session type output nodes. Could optimize to group nodes by
205 * fib but lookup would then require session type parsing in session node.
206 * Trade memory for speed, for now */
207 u32 *session_type_to_next;
209 /** Thread used for allocating active open connections, i.e., half-opens
210 * for transports like tcp, and sessions that will be migrated for cl
211 * transports like udp. If vpp has workers, this will be first worker. */
212 u32 transport_cl_thread;
214 transport_proto_t last_transport_proto_type;
216 /** Number of workers at pool realloc barrier */
217 volatile u32 pool_realloc_at_barrier;
219 /** Number of workers doing reallocs */
220 volatile u32 pool_realloc_doing_work;
222 /** Lock to synchronize parallel forced reallocs */
223 clib_spinlock_t pool_realloc_lock;
229 /** Session manager is enabled */
232 /** Session manager initialized (not necessarily enabled) */
235 /** Enable session manager at startup */
236 u8 session_enable_asap;
238 /** Poll session node in main thread */
241 /** Allocate private rx mqs for external apps */
242 u8 use_private_rx_mqs;
244 /** Do not enable session queue node adaptive mode */
247 /** vpp fifo event queue configured length */
248 u32 configured_wrk_mq_length;
250 /** Session ssvm segment configs*/
251 uword wrk_mqs_segment_size;
253 /** Session enable dma*/
256 /** Session table size parameters */
257 u32 configured_v4_session_table_buckets;
258 u32 configured_v4_session_table_memory;
259 u32 configured_v4_halfopen_table_buckets;
260 u32 configured_v4_halfopen_table_memory;
261 u32 configured_v6_session_table_buckets;
262 u32 configured_v6_session_table_memory;
263 u32 configured_v6_halfopen_table_buckets;
264 u32 configured_v6_halfopen_table_memory;
266 /** Transport table (preallocation) size parameters */
267 u32 local_endpoints_table_memory;
268 u32 local_endpoints_table_buckets;
270 /** Transport source port allocation range */
271 u16 port_allocator_min_src_port;
272 u16 port_allocator_max_src_port;
274 /** Preallocate session config parameter */
275 u32 preallocated_sessions;
279 /** Query nat44-ed session to get original dst ip4 & dst port. */
280 nat44_original_dst_lookup_fn original_dst_lookup;
283 extern session_main_t session_main;
284 extern vlib_node_registration_t session_queue_node;
285 extern vlib_node_registration_t session_input_node;
286 extern vlib_node_registration_t session_queue_process_node;
287 extern vlib_node_registration_t session_queue_pre_input_node;
289 typedef enum session_q_process_evt_
291 SESSION_Q_PROCESS_RUN_ON_MAIN = 1,
292 SESSION_Q_PROCESS_STOP
293 } session_q_process_evt_t;
295 #define TRANSPORT_PROTO_INVALID (session_main.last_transport_proto_type + 1)
296 #define TRANSPORT_N_PROTOS (session_main.last_transport_proto_type + 1)
299 session_evt_add_old (session_worker_t * wrk, session_evt_elt_t * elt)
301 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
302 clib_llist_elt (wrk->event_elts, wrk->old_head));
306 session_evt_add_head_old (session_worker_t * wrk, session_evt_elt_t * elt)
308 clib_llist_add (wrk->event_elts, evt_list, elt,
309 clib_llist_elt (wrk->event_elts, wrk->old_head));
314 session_evt_ctrl_data_alloc (session_worker_t * wrk)
316 session_evt_ctrl_data_t *data;
317 pool_get (wrk->ctrl_evts_data, data);
318 return (data - wrk->ctrl_evts_data);
321 static inline session_evt_elt_t *
322 session_evt_alloc_ctrl (session_worker_t * wrk)
324 session_evt_elt_t *elt;
325 clib_llist_get (wrk->event_elts, elt);
326 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
327 clib_llist_elt (wrk->event_elts, wrk->ctrl_head));
332 session_evt_ctrl_data (session_worker_t * wrk, session_evt_elt_t * elt)
334 return (void *) (pool_elt_at_index (wrk->ctrl_evts_data,
335 elt->evt.ctrl_data_index));
339 session_evt_ctrl_data_free (session_worker_t * wrk, session_evt_elt_t * elt)
341 ASSERT (elt->evt.event_type >= SESSION_CTRL_EVT_RPC);
342 pool_put_index (wrk->ctrl_evts_data, elt->evt.ctrl_data_index);
345 static inline session_evt_elt_t *
346 session_evt_alloc_new (session_worker_t * wrk)
348 session_evt_elt_t *elt;
349 clib_llist_get (wrk->event_elts, elt);
350 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
351 clib_llist_elt (wrk->event_elts, wrk->new_head));
355 static inline session_evt_elt_t *
356 session_evt_alloc_old (session_worker_t * wrk)
358 session_evt_elt_t *elt;
359 clib_llist_get (wrk->event_elts, elt);
360 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
361 clib_llist_elt (wrk->event_elts, wrk->old_head));
365 int session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq);
367 session_t *session_alloc (u32 thread_index);
368 void session_free (session_t * s);
369 void session_cleanup (session_t *s);
370 void session_program_cleanup (session_t *s);
371 void session_cleanup_half_open (session_handle_t ho_handle);
372 u8 session_is_valid (u32 si, u8 thread_index);
374 always_inline session_t *
375 session_get (u32 si, u32 thread_index)
377 ASSERT (session_is_valid (si, thread_index));
378 return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
381 always_inline session_t *
382 session_get_if_valid (u64 si, u32 thread_index)
384 if (thread_index >= vec_len (session_main.wrk))
387 if (pool_is_free_index (session_main.wrk[thread_index].sessions, si))
390 ASSERT (session_is_valid (si, thread_index));
391 return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
394 always_inline session_t *
395 session_get_from_handle (session_handle_tu_t handle)
397 session_main_t *smm = &session_main;
398 return pool_elt_at_index (smm->wrk[handle.thread_index].sessions,
399 handle.session_index);
402 always_inline session_t *
403 session_get_from_handle_if_valid (session_handle_tu_t handle)
405 return session_get_if_valid (handle.session_index, handle.thread_index);
409 * Get session from handle and avoid pool validation if no same thread
411 * Peekers are fine because pool grows with barrier (see @ref session_alloc)
413 always_inline session_t *
414 session_get_from_handle_safe (session_handle_tu_t handle)
416 session_worker_t *wrk = &session_main.wrk[handle.thread_index];
418 if (handle.thread_index == vlib_get_thread_index ())
420 return pool_elt_at_index (wrk->sessions, handle.session_index);
424 /* Don't use pool_elt_at index to avoid pool bitmap reallocs */
425 return wrk->sessions + handle.session_index;
429 always_inline session_t *
430 session_clone_safe (u32 session_index, u32 thread_index)
432 u32 current_thread_index = vlib_get_thread_index (), new_index;
433 session_t *old_s, *new_s;
435 new_s = session_alloc (current_thread_index);
436 new_index = new_s->session_index;
437 /* Session pools are reallocated with barrier (see @ref session_alloc) */
438 old_s = session_main.wrk[thread_index].sessions + session_index;
439 clib_memcpy_fast (new_s, old_s, sizeof (*new_s));
440 new_s->thread_index = current_thread_index;
441 new_s->session_index = new_index;
445 int session_open (session_endpoint_cfg_t *sep, session_handle_t *rsh);
446 int session_listen (session_t * s, session_endpoint_cfg_t * sep);
447 int session_stop_listen (session_t * s);
448 void session_half_close (session_t *s);
449 void session_close (session_t * s);
450 void session_reset (session_t * s);
451 void session_detach_app (session_t *s);
452 void session_transport_half_close (session_t *s);
453 void session_transport_close (session_t * s);
454 void session_transport_reset (session_t * s);
455 void session_transport_cleanup (session_t * s);
456 int session_enqueue_notify (session_t *s);
457 int session_dequeue_notify (session_t * s);
458 int session_enqueue_notify_cl (session_t *s);
459 int session_send_io_evt_to_thread (svm_fifo_t *f, session_evt_type_t evt_type);
460 int session_send_io_evt_to_thread_custom (void *data, u32 thread_index,
461 session_evt_type_t evt_type);
462 int session_program_tx_io_evt (session_handle_tu_t sh,
463 session_evt_type_t evt_type);
464 void session_send_rpc_evt_to_thread (u32 thread_index, void *fp,
466 void session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp,
468 void session_add_self_custom_tx_evt (transport_connection_t * tc,
470 void sesssion_reschedule_tx (transport_connection_t * tc);
471 transport_connection_t *session_get_transport (session_t * s);
472 void session_get_endpoint (session_t * s, transport_endpoint_t * tep,
474 int session_transport_attribute (session_t *s, u8 is_get,
475 transport_endpt_attr_t *attr);
476 u64 session_segment_handle (session_t *s);
478 u8 *format_session (u8 * s, va_list * args);
479 uword unformat_session (unformat_input_t * input, va_list * args);
480 uword unformat_transport_connection (unformat_input_t * input,
484 * Interface to transport protos
487 int session_enqueue_stream_connection (transport_connection_t * tc,
488 vlib_buffer_t * b, u32 offset,
489 u8 queue_event, u8 is_in_order);
490 int session_enqueue_dgram_connection (session_t * s,
491 session_dgram_hdr_t * hdr,
492 vlib_buffer_t * b, u8 proto,
494 int session_enqueue_dgram_connection2 (session_t *s, session_dgram_hdr_t *hdr,
495 vlib_buffer_t *b, u8 proto,
497 int session_enqueue_dgram_connection_cl (session_t *s,
498 session_dgram_hdr_t *hdr,
499 vlib_buffer_t *b, u8 proto,
501 int session_stream_connect_notify (transport_connection_t * tc,
502 session_error_t err);
503 int session_dgram_connect_notify (transport_connection_t * tc,
504 u32 old_thread_index,
505 session_t ** new_session);
506 int session_stream_accept_notify (transport_connection_t * tc);
507 void session_transport_closing_notify (transport_connection_t * tc);
508 void session_transport_delete_notify (transport_connection_t * tc);
509 void session_half_open_delete_notify (transport_connection_t *tc);
510 void session_half_open_migrate_notify (transport_connection_t *tc);
511 int session_half_open_migrated_notify (transport_connection_t *tc);
512 void session_transport_closed_notify (transport_connection_t * tc);
513 void session_transport_reset_notify (transport_connection_t * tc);
514 int session_stream_accept (transport_connection_t * tc, u32 listener_index,
515 u32 thread_index, u8 notify);
516 int session_dgram_accept (transport_connection_t * tc, u32 listener_index,
520 * Initialize session layer for given transport proto and ip version
522 * Allocates per session type (transport proto + ip version) data structures
523 * and adds arc from session queue node to session type output node.
525 * @param transport_proto transport proto to be registered
526 * @param vft virtual function table for transport
527 * @param is_ip4 flag that indicates if transports uses ipv4
528 * as underlying network layer
529 * @param output_node output node for transport
531 void session_register_transport (transport_proto_t transport_proto,
532 const transport_proto_vft_t * vft, u8 is_ip4,
534 transport_proto_t session_add_transport_proto (void);
535 void session_register_update_time_fn (session_update_time_fn fn, u8 is_add);
536 int session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
537 u32 offset, u32 max_bytes);
538 u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes);
541 session_set_state (session_t *s, session_state_t session_state)
543 s->session_state = session_state;
544 SESSION_EVT (SESSION_EVT_STATE_CHANGE, s);
548 transport_max_rx_enqueue (transport_connection_t * tc)
550 session_t *s = session_get (tc->s_index, tc->thread_index);
551 return svm_fifo_max_enqueue_prod (s->rx_fifo);
555 transport_max_tx_dequeue (transport_connection_t * tc)
557 session_t *s = session_get (tc->s_index, tc->thread_index);
558 return svm_fifo_max_dequeue_cons (s->tx_fifo);
562 transport_max_rx_dequeue (transport_connection_t * tc)
564 session_t *s = session_get (tc->s_index, tc->thread_index);
565 return svm_fifo_max_dequeue (s->rx_fifo);
569 transport_rx_fifo_size (transport_connection_t * tc)
571 session_t *s = session_get (tc->s_index, tc->thread_index);
572 return svm_fifo_size (s->rx_fifo);
576 transport_tx_fifo_size (transport_connection_t * tc)
578 session_t *s = session_get (tc->s_index, tc->thread_index);
579 return svm_fifo_size (s->tx_fifo);
583 transport_rx_fifo_has_ooo_data (transport_connection_t * tc)
585 session_t *s = session_get (tc->c_index, tc->thread_index);
586 return svm_fifo_has_ooo_data (s->rx_fifo);
590 transport_tx_fifo_has_dgram (transport_connection_t *tc)
592 session_t *s = session_get (tc->s_index, tc->thread_index);
593 u32 max_deq = svm_fifo_max_dequeue_cons (s->tx_fifo);
594 session_dgram_pre_hdr_t phdr;
596 if (max_deq <= sizeof (session_dgram_hdr_t))
598 svm_fifo_peek (s->tx_fifo, 0, sizeof (phdr), (u8 *) &phdr);
599 return max_deq >= phdr.data_length + sizeof (session_dgram_hdr_t);
603 transport_rx_fifo_req_deq_ntf (transport_connection_t *tc)
605 session_t *s = session_get (tc->s_index, tc->thread_index);
606 svm_fifo_add_want_deq_ntf (s->rx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
609 always_inline clib_time_type_t
610 transport_time_now (u32 thread_index)
612 return session_main.wrk[thread_index].last_vlib_time;
615 always_inline clib_us_time_t
616 transport_us_time_now (u32 thread_index)
618 return session_main.wrk[thread_index].last_vlib_us_time;
621 always_inline clib_time_type_t
622 transport_seconds_per_loop (u32 thread_index)
624 return session_main.wrk[thread_index].vm->seconds_per_loop;
628 transport_add_tx_event (transport_connection_t * tc)
630 session_t *s = session_get (tc->s_index, tc->thread_index);
631 if (svm_fifo_has_event (s->tx_fifo))
633 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
637 transport_cl_thread (void)
639 return session_main.transport_cl_thread;
643 session_vlib_thread_is_cl_thread (void)
645 return (vlib_get_thread_index () == transport_cl_thread () ||
646 vlib_thread_is_main_w_barrier ());
653 always_inline session_handle_t
654 listen_session_get_handle (session_t *s)
656 ASSERT (s->session_state == SESSION_STATE_LISTENING ||
657 session_get_transport_proto (s) == TRANSPORT_PROTO_QUIC);
658 return session_handle (s);
661 always_inline session_t *
662 listen_session_get_from_handle (session_handle_t handle)
664 return session_get_from_handle (handle);
668 listen_session_parse_handle (session_handle_t handle, u32 * index,
671 session_parse_handle (handle, index, thread_index);
674 always_inline session_t *
675 listen_session_alloc (u8 thread_index, session_type_t type)
678 s = session_alloc (thread_index);
679 s->session_type = type;
680 s->session_state = SESSION_STATE_LISTENING;
684 always_inline session_t *
685 listen_session_get (u32 ls_index)
687 return session_get (ls_index, 0);
691 listen_session_free (session_t * s)
693 ASSERT (!s->rx_fifo);
697 always_inline session_t *
698 ho_session_alloc (void)
701 ASSERT (session_vlib_thread_is_cl_thread ());
702 s = session_alloc (transport_cl_thread ());
703 s->session_state = SESSION_STATE_CONNECTING;
704 s->flags |= SESSION_F_HALF_OPEN;
708 always_inline session_t *
709 ho_session_get (u32 ho_index)
711 return session_get (ho_index, transport_cl_thread ());
715 ho_session_free (session_t *s)
717 ASSERT (!s->rx_fifo && s->thread_index == 0);
721 transport_connection_t *listen_session_get_transport (session_t * s);
724 * Session layer functions
727 always_inline session_main_t *
728 vnet_get_session_main ()
730 return &session_main;
733 always_inline session_worker_t *
734 session_main_get_worker (u32 thread_index)
736 return vec_elt_at_index (session_main.wrk, thread_index);
739 static inline session_worker_t *
740 session_main_get_worker_if_valid (u32 thread_index)
742 if (thread_index > vec_len (session_main.wrk))
744 return session_main_get_worker (thread_index);
747 always_inline svm_msg_q_t *
748 session_main_get_vpp_event_queue (u32 thread_index)
750 return session_main_get_worker (thread_index)->vpp_event_queue;
754 session_main_is_enabled ()
756 return session_main.is_enabled == 1;
760 session_worker_stat_error_inc (session_worker_t *wrk, int error, int value)
762 if ((-(error) >= 0 && -(error) < SESSION_N_ERRORS))
763 wrk->stats.errors[-error] += value;
765 SESSION_DBG ("unknown session counter");
769 session_stat_error_inc (int error, int value)
771 session_worker_t *wrk;
772 wrk = session_main_get_worker (vlib_get_thread_index ());
773 session_worker_stat_error_inc (wrk, error, value);
776 #define session_cli_return_if_not_enabled() \
778 if (!session_main.is_enabled) \
779 return clib_error_return (0, "session layer is not enabled"); \
782 void session_main_flush_enqueue_events (transport_proto_t transport_proto,
784 void session_queue_run_on_main_thread (vlib_main_t * vm);
787 * Add session node pending buffer with custom node
789 * @param thread_index worker thread expected to send the buffer
790 * @param bi buffer index
791 * @param next_node next node edge index for buffer. Edge to next node
795 session_add_pending_tx_buffer (u32 thread_index, u32 bi, u32 next_node)
797 session_worker_t *wrk = session_main_get_worker (thread_index);
798 vec_add1 (wrk->pending_tx_buffers, bi);
799 vec_add1 (wrk->pending_tx_nexts, next_node);
800 if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
801 vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
805 session_wrk_update_time (session_worker_t *wrk, f64 now)
807 wrk->last_vlib_time = now;
808 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
811 void session_wrk_enable_adaptive_mode (session_worker_t *wrk);
812 fifo_segment_t *session_main_get_wrk_mqs_segment (void);
813 void session_node_enable_disable (u8 is_en);
814 clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);
815 void session_wrk_handle_evts_main_rpc (void *);
816 void session_wrk_program_app_wrk_evts (session_worker_t *wrk,
819 session_t *session_alloc_for_connection (transport_connection_t * tc);
820 session_t *session_alloc_for_half_open (transport_connection_t *tc);
821 void session_get_original_dst (transport_endpoint_t *i2o_src,
822 transport_endpoint_t *i2o_dst,
823 transport_proto_t transport_proto,
824 u32 *original_dst, u16 *original_dst_port);
826 typedef void (pool_safe_realloc_rpc_fn) (void *rpc_args);
830 u8 ph[STRUCT_OFFSET_OF (pool_header_t, max_elts) + 4];
832 } pool_safe_realloc_header_t;
834 STATIC_ASSERT_SIZEOF (pool_safe_realloc_header_t, sizeof (pool_header_t));
836 #define POOL_REALLOC_SAFE_ELT_THRESH 32
838 #define pool_realloc_flag(PH) \
839 ((pool_safe_realloc_header_t *) pool_header (PH))->flag
841 typedef struct pool_realloc_rpc_args_
846 } pool_realloc_rpc_args_t;
849 pool_program_safe_realloc_rpc (void *args)
851 vlib_main_t *vm = vlib_get_main ();
852 u32 free_elts, max_elts, n_alloc;
853 pool_realloc_rpc_args_t *pra;
855 ASSERT (vlib_get_thread_index () == 0);
856 pra = (pool_realloc_rpc_args_t *) args;
858 vlib_worker_thread_barrier_sync (vm);
860 free_elts = _pool_free_elts (*pra->pool, pra->elt_size);
861 if (free_elts < POOL_REALLOC_SAFE_ELT_THRESH)
863 max_elts = _vec_max_len (*pra->pool, pra->elt_size);
864 n_alloc = clib_max (2 * max_elts, POOL_REALLOC_SAFE_ELT_THRESH);
865 _pool_alloc (pra->pool, n_alloc, pra->align, 0, pra->elt_size);
867 pool_realloc_flag (*pra->pool) = 0;
868 clib_mem_free (args);
870 vlib_worker_thread_barrier_release (vm);
874 pool_program_safe_realloc (void **p, u32 elt_size, u32 align)
876 pool_realloc_rpc_args_t *pra;
878 /* Reuse pad as a realloc flag */
879 if (pool_realloc_flag (*p))
882 pra = clib_mem_alloc (sizeof (*pra));
884 pra->elt_size = elt_size;
886 pool_realloc_flag (*p) = 1;
888 session_send_rpc_evt_to_thread (0 /* thread index */,
889 pool_program_safe_realloc_rpc, pra);
892 #define pool_needs_realloc(P) \
894 (vec_len (pool_header (P)->free_indices) < POOL_REALLOC_SAFE_ELT_THRESH && \
895 pool_free_elts (P) < POOL_REALLOC_SAFE_ELT_THRESH))
897 #define pool_get_aligned_safe(P, E, align) \
900 if (PREDICT_FALSE (pool_needs_realloc (P))) \
902 if (PREDICT_FALSE (!(P))) \
904 pool_alloc_aligned (P, POOL_REALLOC_SAFE_ELT_THRESH, align); \
906 else if (PREDICT_FALSE (!pool_free_elts (P))) \
908 vlib_workers_sync (); \
909 pool_alloc_aligned (P, pool_max_len (P), align); \
910 vlib_workers_continue (); \
911 ALWAYS_ASSERT (pool_free_elts (P) > 0); \
915 pool_program_safe_realloc ((void **) &(P), sizeof ((P)[0]), \
916 _vec_align (P, align)); \
919 pool_get_aligned (P, E, align); \
923 #endif /* __included_session_h__ */
926 * fd.io coding-style-patch-verification: ON
929 * eval: (c-set-style "gnu")