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_tx_context_
45 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
47 transport_proto_vft_t *transport_vft;
48 transport_connection_t *tc;
49 transport_send_params_t sp;
53 u16 deq_per_first_buf;
58 CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
59 session_dgram_hdr_t hdr;
61 /** Vector of tx buffer free lists */
63 vlib_buffer_t **transport_pending_bufs;
64 } session_tx_context_t;
66 typedef struct session_evt_elt
68 clib_llist_anchor_t evt_list;
72 typedef struct session_ctrl_evt_data_
74 u8 data[SESSION_CTRL_MSG_MAX_SIZE];
75 } session_evt_ctrl_data_t;
77 typedef enum session_wrk_state_
80 SESSION_WRK_INTERRUPT,
82 } __clib_packed session_wrk_state_t;
84 typedef enum session_wrk_flags_
86 SESSION_WRK_F_ADAPTIVE = 1 << 0,
87 } __clib_packed session_wrk_flag_t;
89 #define DMA_TRANS_SIZE 1024
92 u32 *pending_tx_buffers;
93 u16 *pending_tx_nexts;
94 } session_dma_transfer;
96 typedef struct session_worker_
98 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
100 /** Worker session pool */
103 /** vpp event message queue for worker */
104 svm_msg_q_t *vpp_event_queue;
106 /** vlib_time_now last time around the track */
107 clib_time_type_t last_vlib_time;
109 /** vlib_time_now rounded to us precision and as u64 */
110 clib_us_time_t last_vlib_us_time;
112 /** Convenience pointer to this worker's vlib_main */
115 /** Per-proto vector of sessions to enqueue */
116 u32 **session_to_enqueue;
118 /** Timerfd used to periodically signal wrk session queue node */
122 session_wrk_flag_t flags;
125 session_wrk_state_t state;
127 /** Context for session tx */
128 session_tx_context_t ctx;
130 /** Pool of session event list elements */
131 session_evt_elt_t *event_elts;
133 /** Pool of ctrl events data buffers */
134 session_evt_ctrl_data_t *ctrl_evts_data;
136 /** Head of control events list */
137 clib_llist_index_t ctrl_head;
139 /** Head of list of elements */
140 clib_llist_index_t new_head;
142 /** Head of list of pending events */
143 clib_llist_index_t old_head;
145 /** Vector of buffers to be sent */
146 u32 *pending_tx_buffers;
148 /** Vector of nexts for the pending tx buffers */
149 u16 *pending_tx_nexts;
151 /** Clib file for timerfd. Used only if adaptive mode is on */
154 /** List of pending connects for first worker */
155 clib_llist_index_t pending_connects;
157 /** Flag that is set if main thread signaled to handle connects */
158 u32 n_pending_connects;
160 /** List head for first worker evts pending handling on main */
161 clib_llist_index_t evts_pending_main;
165 session_dma_transfer *dma_trans;
170 vlib_dma_batch_t *batch;
173 /** last event poll time by thread */
174 clib_time_type_t last_event_poll;
178 typedef int (session_fifo_rx_fn) (session_worker_t * wrk,
179 vlib_node_runtime_t * node,
180 session_evt_elt_t * e, int *n_tx_packets);
182 extern session_fifo_rx_fn session_tx_fifo_peek_and_snd;
183 extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd;
184 extern session_fifo_rx_fn session_tx_fifo_dequeue_internal;
186 u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e);
188 typedef void (*session_update_time_fn) (f64 time_now, u8 thread_index);
190 typedef struct session_main_
192 /** Worker contexts */
193 session_worker_t *wrk;
195 /** Vector of transport update time functions */
196 session_update_time_fn *update_time_fns;
198 /** Event queues memfd segment */
199 fifo_segment_t wrk_mqs_segment;
201 /** Unique segment name counter */
202 u32 unique_segment_name_counter;
204 /** Per transport rx function that can either dequeue or peek */
205 session_fifo_rx_fn **session_tx_fns;
207 /** Per session type output nodes. Could optimize to group nodes by
208 * fib but lookup would then require session type parsing in session node.
209 * Trade memory for speed, for now */
210 u32 *session_type_to_next;
212 /** Thread used for allocating active open connections, i.e., half-opens
213 * for transports like tcp, and sessions that will be migrated for cl
214 * transports like udp. If vpp has workers, this will be first worker. */
215 u32 transport_cl_thread;
217 transport_proto_t last_transport_proto_type;
219 /** Number of workers at pool realloc barrier */
220 volatile u32 pool_realloc_at_barrier;
222 /** Number of workers doing reallocs */
223 volatile u32 pool_realloc_doing_work;
225 /** Lock to synchronize parallel forced reallocs */
226 clib_spinlock_t pool_realloc_lock;
232 /** Session manager is enabled */
235 /** Session manager initialized (not necessarily enabled) */
238 /** Enable session manager at startup */
239 u8 session_enable_asap;
241 /** Poll session node in main thread */
244 /** Allocate private rx mqs for external apps */
245 u8 use_private_rx_mqs;
247 /** Do not enable session queue node adaptive mode */
250 /** vpp fifo event queue configured length */
251 u32 configured_wrk_mq_length;
253 /** Session ssvm segment configs*/
254 uword wrk_mqs_segment_size;
256 /** Session enable dma*/
259 /** Session table size parameters */
260 u32 configured_v4_session_table_buckets;
261 u32 configured_v4_session_table_memory;
262 u32 configured_v4_halfopen_table_buckets;
263 u32 configured_v4_halfopen_table_memory;
264 u32 configured_v6_session_table_buckets;
265 u32 configured_v6_session_table_memory;
266 u32 configured_v6_halfopen_table_buckets;
267 u32 configured_v6_halfopen_table_memory;
269 /** Transport table (preallocation) size parameters */
270 u32 local_endpoints_table_memory;
271 u32 local_endpoints_table_buckets;
273 /** Preallocate session config parameter */
274 u32 preallocated_sessions;
279 extern session_main_t session_main;
280 extern vlib_node_registration_t session_queue_node;
281 extern vlib_node_registration_t session_queue_process_node;
282 extern vlib_node_registration_t session_queue_pre_input_node;
284 typedef enum session_q_process_evt_
286 SESSION_Q_PROCESS_RUN_ON_MAIN = 1,
287 SESSION_Q_PROCESS_STOP
288 } session_q_process_evt_t;
290 #define TRANSPORT_PROTO_INVALID (session_main.last_transport_proto_type + 1)
291 #define TRANSPORT_N_PROTOS (session_main.last_transport_proto_type + 1)
294 session_evt_add_old (session_worker_t * wrk, session_evt_elt_t * elt)
296 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
297 clib_llist_elt (wrk->event_elts, wrk->old_head));
301 session_evt_add_head_old (session_worker_t * wrk, session_evt_elt_t * elt)
303 clib_llist_add (wrk->event_elts, evt_list, elt,
304 clib_llist_elt (wrk->event_elts, wrk->old_head));
309 session_evt_ctrl_data_alloc (session_worker_t * wrk)
311 session_evt_ctrl_data_t *data;
312 pool_get (wrk->ctrl_evts_data, data);
313 return (data - wrk->ctrl_evts_data);
316 static inline session_evt_elt_t *
317 session_evt_alloc_ctrl (session_worker_t * wrk)
319 session_evt_elt_t *elt;
320 clib_llist_get (wrk->event_elts, elt);
321 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
322 clib_llist_elt (wrk->event_elts, wrk->ctrl_head));
327 session_evt_ctrl_data (session_worker_t * wrk, session_evt_elt_t * elt)
329 return (void *) (pool_elt_at_index (wrk->ctrl_evts_data,
330 elt->evt.ctrl_data_index));
334 session_evt_ctrl_data_free (session_worker_t * wrk, session_evt_elt_t * elt)
336 ASSERT (elt->evt.event_type > SESSION_IO_EVT_BUILTIN_TX);
337 pool_put_index (wrk->ctrl_evts_data, elt->evt.ctrl_data_index);
340 static inline session_evt_elt_t *
341 session_evt_alloc_new (session_worker_t * wrk)
343 session_evt_elt_t *elt;
344 clib_llist_get (wrk->event_elts, elt);
345 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
346 clib_llist_elt (wrk->event_elts, wrk->new_head));
350 static inline session_evt_elt_t *
351 session_evt_alloc_old (session_worker_t * wrk)
353 session_evt_elt_t *elt;
354 clib_llist_get (wrk->event_elts, elt);
355 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
356 clib_llist_elt (wrk->event_elts, wrk->old_head));
360 int session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq);
362 session_t *session_alloc (u32 thread_index);
363 void session_free (session_t * s);
364 void session_free_w_fifos (session_t * s);
365 void session_cleanup_half_open (session_handle_t ho_handle);
366 u8 session_is_valid (u32 si, u8 thread_index);
368 always_inline session_t *
369 session_get (u32 si, u32 thread_index)
371 ASSERT (session_is_valid (si, thread_index));
372 return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
375 always_inline session_t *
376 session_get_if_valid (u64 si, u32 thread_index)
378 if (thread_index >= vec_len (session_main.wrk))
381 if (pool_is_free_index (session_main.wrk[thread_index].sessions, si))
384 ASSERT (session_is_valid (si, thread_index));
385 return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
388 always_inline session_t *
389 session_get_from_handle (session_handle_t handle)
391 session_main_t *smm = &session_main;
392 u32 session_index, thread_index;
393 session_parse_handle (handle, &session_index, &thread_index);
394 return pool_elt_at_index (smm->wrk[thread_index].sessions, session_index);
397 always_inline session_t *
398 session_get_from_handle_if_valid (session_handle_t handle)
400 u32 session_index, thread_index;
401 session_parse_handle (handle, &session_index, &thread_index);
402 return session_get_if_valid (session_index, thread_index);
405 u64 session_segment_handle (session_t * s);
408 * Get session from handle and avoid pool validation if no same thread
410 * Peekers are fine because pool grows with barrier (see @ref session_alloc)
412 always_inline session_t *
413 session_get_from_handle_safe (u64 handle)
415 u32 thread_index = session_thread_from_handle (handle);
416 session_worker_t *wrk = &session_main.wrk[thread_index];
418 if (thread_index == vlib_get_thread_index ())
420 return pool_elt_at_index (wrk->sessions,
421 session_index_from_handle (handle));
425 /* Don't use pool_elt_at index to avoid pool bitmap reallocs */
426 return wrk->sessions + session_index_from_handle (handle);
430 always_inline session_t *
431 session_clone_safe (u32 session_index, u32 thread_index)
433 u32 current_thread_index = vlib_get_thread_index (), new_index;
434 session_t *old_s, *new_s;
436 new_s = session_alloc (current_thread_index);
437 new_index = new_s->session_index;
438 /* Session pools are reallocated with barrier (see @ref session_alloc) */
439 old_s = session_main.wrk[thread_index].sessions + session_index;
440 clib_memcpy_fast (new_s, old_s, sizeof (*new_s));
441 new_s->thread_index = current_thread_index;
442 new_s->session_index = new_index;
446 int session_open (session_endpoint_cfg_t *sep, session_handle_t *rsh);
447 int session_listen (session_t * s, session_endpoint_cfg_t * sep);
448 int session_stop_listen (session_t * s);
449 void session_half_close (session_t *s);
450 void session_close (session_t * s);
451 void session_reset (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_send_io_evt_to_thread (svm_fifo_t * f,
457 session_evt_type_t evt_type);
458 int session_enqueue_notify (session_t * s);
459 int session_dequeue_notify (session_t * s);
460 int session_send_io_evt_to_thread_custom (void *data, u32 thread_index,
461 session_evt_type_t evt_type);
462 void session_send_rpc_evt_to_thread (u32 thread_index, void *fp,
464 void session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp,
466 void session_add_self_custom_tx_evt (transport_connection_t * tc,
468 void sesssion_reschedule_tx (transport_connection_t * tc);
469 transport_connection_t *session_get_transport (session_t * s);
470 void session_get_endpoint (session_t * s, transport_endpoint_t * tep,
472 int session_transport_attribute (session_t *s, u8 is_get,
473 transport_endpt_attr_t *attr);
475 u8 *format_session (u8 * s, va_list * args);
476 uword unformat_session (unformat_input_t * input, va_list * args);
477 uword unformat_transport_connection (unformat_input_t * input,
481 * Interface to transport protos
484 int session_enqueue_stream_connection (transport_connection_t * tc,
485 vlib_buffer_t * b, u32 offset,
486 u8 queue_event, u8 is_in_order);
487 int session_enqueue_dgram_connection (session_t * s,
488 session_dgram_hdr_t * hdr,
489 vlib_buffer_t * b, u8 proto,
491 int session_stream_connect_notify (transport_connection_t * tc,
492 session_error_t err);
493 int session_dgram_connect_notify (transport_connection_t * tc,
494 u32 old_thread_index,
495 session_t ** new_session);
496 int session_stream_accept_notify (transport_connection_t * tc);
497 void session_transport_closing_notify (transport_connection_t * tc);
498 void session_transport_delete_notify (transport_connection_t * tc);
499 void session_half_open_delete_notify (transport_connection_t *tc);
500 void session_half_open_migrate_notify (transport_connection_t *tc);
501 int session_half_open_migrated_notify (transport_connection_t *tc);
502 void session_transport_closed_notify (transport_connection_t * tc);
503 void session_transport_reset_notify (transport_connection_t * tc);
504 int session_stream_accept (transport_connection_t * tc, u32 listener_index,
505 u32 thread_index, u8 notify);
506 int session_dgram_accept (transport_connection_t * tc, u32 listener_index,
509 * Initialize session layer for given transport proto and ip version
511 * Allocates per session type (transport proto + ip version) data structures
512 * and adds arc from session queue node to session type output node.
514 * @param transport_proto transport proto to be registered
515 * @param vft virtual function table for transport
516 * @param is_ip4 flag that indicates if transports uses ipv4
517 * as underlying network layer
518 * @param output_node output node for transport
520 void session_register_transport (transport_proto_t transport_proto,
521 const transport_proto_vft_t * vft, u8 is_ip4,
523 transport_proto_t session_add_transport_proto (void);
524 void session_register_update_time_fn (session_update_time_fn fn, u8 is_add);
525 int session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
526 u32 offset, u32 max_bytes);
527 u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes);
530 session_set_state (session_t *s, session_state_t session_state)
532 s->session_state = session_state;
533 SESSION_EVT (SESSION_EVT_STATE_CHANGE, s);
537 transport_max_rx_enqueue (transport_connection_t * tc)
539 session_t *s = session_get (tc->s_index, tc->thread_index);
540 return svm_fifo_max_enqueue_prod (s->rx_fifo);
544 transport_max_tx_dequeue (transport_connection_t * tc)
546 session_t *s = session_get (tc->s_index, tc->thread_index);
547 return svm_fifo_max_dequeue_cons (s->tx_fifo);
551 transport_max_rx_dequeue (transport_connection_t * tc)
553 session_t *s = session_get (tc->s_index, tc->thread_index);
554 return svm_fifo_max_dequeue (s->rx_fifo);
558 transport_rx_fifo_size (transport_connection_t * tc)
560 session_t *s = session_get (tc->s_index, tc->thread_index);
561 return svm_fifo_size (s->rx_fifo);
565 transport_tx_fifo_size (transport_connection_t * tc)
567 session_t *s = session_get (tc->s_index, tc->thread_index);
568 return svm_fifo_size (s->tx_fifo);
572 transport_rx_fifo_has_ooo_data (transport_connection_t * tc)
574 session_t *s = session_get (tc->c_index, tc->thread_index);
575 return svm_fifo_has_ooo_data (s->rx_fifo);
579 transport_rx_fifo_req_deq_ntf (transport_connection_t *tc)
581 session_t *s = session_get (tc->s_index, tc->thread_index);
582 svm_fifo_add_want_deq_ntf (s->rx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
585 always_inline clib_time_type_t
586 transport_time_now (u32 thread_index)
588 return session_main.wrk[thread_index].last_vlib_time;
591 always_inline clib_us_time_t
592 transport_us_time_now (u32 thread_index)
594 return session_main.wrk[thread_index].last_vlib_us_time;
597 always_inline clib_time_type_t
598 transport_seconds_per_loop (u32 thread_index)
600 return session_main.wrk[thread_index].vm->seconds_per_loop;
604 transport_add_tx_event (transport_connection_t * tc)
606 session_t *s = session_get (tc->s_index, tc->thread_index);
607 if (svm_fifo_has_event (s->tx_fifo))
609 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
613 transport_cl_thread (void)
615 return session_main.transport_cl_thread;
619 session_vlib_thread_is_cl_thread (void)
621 return (vlib_get_thread_index () == transport_cl_thread () ||
622 vlib_thread_is_main_w_barrier ());
630 listen_session_get_handle (session_t * s)
632 ASSERT (s->session_state == SESSION_STATE_LISTENING ||
633 session_get_transport_proto (s) == TRANSPORT_PROTO_QUIC);
634 return session_handle (s);
637 always_inline session_t *
638 listen_session_get_from_handle (session_handle_t handle)
640 return session_get_from_handle (handle);
644 listen_session_parse_handle (session_handle_t handle, u32 * index,
647 session_parse_handle (handle, index, thread_index);
650 always_inline session_t *
651 listen_session_alloc (u8 thread_index, session_type_t type)
654 s = session_alloc (thread_index);
655 s->session_type = type;
656 s->session_state = SESSION_STATE_LISTENING;
660 always_inline session_t *
661 listen_session_get (u32 ls_index)
663 return session_get (ls_index, 0);
667 listen_session_free (session_t * s)
669 ASSERT (!s->rx_fifo);
673 always_inline session_t *
674 ho_session_alloc (void)
677 ASSERT (session_vlib_thread_is_cl_thread ());
678 s = session_alloc (transport_cl_thread ());
679 s->session_state = SESSION_STATE_CONNECTING;
680 s->flags |= SESSION_F_HALF_OPEN;
684 always_inline session_t *
685 ho_session_get (u32 ho_index)
687 return session_get (ho_index, transport_cl_thread ());
691 ho_session_free (session_t *s)
693 ASSERT (!s->rx_fifo && s->thread_index == 0);
697 transport_connection_t *listen_session_get_transport (session_t * s);
700 * Session layer functions
703 always_inline session_main_t *
704 vnet_get_session_main ()
706 return &session_main;
709 always_inline session_worker_t *
710 session_main_get_worker (u32 thread_index)
712 return vec_elt_at_index (session_main.wrk, thread_index);
715 static inline session_worker_t *
716 session_main_get_worker_if_valid (u32 thread_index)
718 if (thread_index > vec_len (session_main.wrk))
720 return session_main_get_worker (thread_index);
723 always_inline svm_msg_q_t *
724 session_main_get_vpp_event_queue (u32 thread_index)
726 return session_main_get_worker (thread_index)->vpp_event_queue;
730 session_main_is_enabled ()
732 return session_main.is_enabled == 1;
735 #define session_cli_return_if_not_enabled() \
737 if (!session_main.is_enabled) \
738 return clib_error_return (0, "session layer is not enabled"); \
741 int session_main_flush_enqueue_events (u8 proto, u32 thread_index);
742 int session_main_flush_all_enqueue_events (u8 transport_proto);
743 void session_queue_run_on_main_thread (vlib_main_t * vm);
746 * Add session node pending buffer with custom node
748 * @param thread_index worker thread expected to send the buffer
749 * @param bi buffer index
750 * @param next_node next node edge index for buffer. Edge to next node
754 session_add_pending_tx_buffer (u32 thread_index, u32 bi, u32 next_node)
756 session_worker_t *wrk = session_main_get_worker (thread_index);
757 vec_add1 (wrk->pending_tx_buffers, bi);
758 vec_add1 (wrk->pending_tx_nexts, next_node);
759 if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
760 vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
764 session_wrk_update_time (session_worker_t *wrk, f64 now)
766 wrk->last_vlib_time = now;
767 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
770 void session_wrk_enable_adaptive_mode (session_worker_t *wrk);
771 fifo_segment_t *session_main_get_wrk_mqs_segment (void);
772 void session_node_enable_disable (u8 is_en);
773 clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);
774 void session_wrk_handle_evts_main_rpc (void *);
776 session_t *session_alloc_for_connection (transport_connection_t * tc);
777 session_t *session_alloc_for_half_open (transport_connection_t *tc);
779 typedef void (pool_safe_realloc_rpc_fn) (void *rpc_args);
783 u8 ph[STRUCT_OFFSET_OF (pool_header_t, max_elts) + 4];
785 } pool_safe_realloc_header_t;
787 STATIC_ASSERT_SIZEOF (pool_safe_realloc_header_t, sizeof (pool_header_t));
789 #define POOL_REALLOC_SAFE_ELT_THRESH 32
791 #define pool_realloc_flag(PH) \
792 ((pool_safe_realloc_header_t *) pool_header (PH))->flag
794 typedef struct pool_realloc_rpc_args_
799 } pool_realloc_rpc_args_t;
802 pool_program_safe_realloc_rpc (void *args)
804 vlib_main_t *vm = vlib_get_main ();
805 u32 free_elts, max_elts, n_alloc;
806 pool_realloc_rpc_args_t *pra;
808 ASSERT (vlib_get_thread_index () == 0);
809 pra = (pool_realloc_rpc_args_t *) args;
811 vlib_worker_thread_barrier_sync (vm);
813 free_elts = _pool_free_elts (*pra->pool, pra->elt_size);
814 if (free_elts < POOL_REALLOC_SAFE_ELT_THRESH)
816 max_elts = _vec_max_len (*pra->pool, pra->elt_size);
817 n_alloc = clib_max (2 * max_elts, POOL_REALLOC_SAFE_ELT_THRESH);
818 _pool_alloc (pra->pool, n_alloc, pra->align, 0, pra->elt_size);
820 pool_realloc_flag (*pra->pool) = 0;
821 clib_mem_free (args);
823 vlib_worker_thread_barrier_release (vm);
827 pool_program_safe_realloc (void **p, u32 elt_size, u32 align)
829 pool_realloc_rpc_args_t *pra;
831 /* Reuse pad as a realloc flag */
832 if (pool_realloc_flag (*p))
835 pra = clib_mem_alloc (sizeof (*pra));
837 pra->elt_size = elt_size;
839 pool_realloc_flag (*p) = 1;
841 session_send_rpc_evt_to_thread (0 /* thread index */,
842 pool_program_safe_realloc_rpc, pra);
845 #define pool_needs_realloc(P) \
847 (vec_len (pool_header (P)->free_indices) < POOL_REALLOC_SAFE_ELT_THRESH && \
848 pool_free_elts (P) < POOL_REALLOC_SAFE_ELT_THRESH))
850 #define pool_get_aligned_safe(P, E, align) \
853 if (PREDICT_FALSE (pool_needs_realloc (P))) \
855 if (PREDICT_FALSE (!(P))) \
857 pool_alloc_aligned (P, POOL_REALLOC_SAFE_ELT_THRESH, align); \
859 else if (PREDICT_FALSE (!pool_free_elts (P))) \
861 vlib_workers_sync (); \
862 pool_alloc_aligned (P, pool_max_len (P), align); \
863 vlib_workers_continue (); \
864 ALWAYS_ASSERT (pool_free_elts (P) > 0); \
868 pool_program_safe_realloc ((void **) &(P), sizeof ((P)[0]), \
869 _vec_align (P, align)); \
872 pool_get_aligned (P, E, align); \
876 #endif /* __included_session_h__ */
879 * fd.io coding-style-patch-verification: ON
882 * eval: (c-set-style "gnu")