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);
197 typedef struct session_main_
199 /** Worker contexts */
200 session_worker_t *wrk;
202 /** Vector of transport update time functions */
203 session_update_time_fn *update_time_fns;
205 /** Event queues memfd segment */
206 fifo_segment_t wrk_mqs_segment;
208 /** Unique segment name counter */
209 u32 unique_segment_name_counter;
211 /** Per transport rx function that can either dequeue or peek */
212 session_fifo_rx_fn **session_tx_fns;
214 /** Per session type output nodes. Could optimize to group nodes by
215 * fib but lookup would then require session type parsing in session node.
216 * Trade memory for speed, for now */
217 u32 *session_type_to_next;
219 /** Thread used for allocating active open connections, i.e., half-opens
220 * for transports like tcp, and sessions that will be migrated for cl
221 * transports like udp. If vpp has workers, this will be first worker. */
222 u32 transport_cl_thread;
224 transport_proto_t last_transport_proto_type;
226 /** Number of workers at pool realloc barrier */
227 volatile u32 pool_realloc_at_barrier;
229 /** Number of workers doing reallocs */
230 volatile u32 pool_realloc_doing_work;
232 /** Lock to synchronize parallel forced reallocs */
233 clib_spinlock_t pool_realloc_lock;
239 /** Session manager is enabled */
242 /** Session manager initialized (not necessarily enabled) */
245 /** Enable session manager at startup */
246 u8 session_enable_asap;
248 /** Poll session node in main thread */
251 /** Allocate private rx mqs for external apps */
252 u8 use_private_rx_mqs;
254 /** Do not enable session queue node adaptive mode */
257 /** vpp fifo event queue configured length */
258 u32 configured_wrk_mq_length;
260 /** Session ssvm segment configs*/
261 uword wrk_mqs_segment_size;
263 /** Session enable dma*/
266 /** Session table size parameters */
267 u32 configured_v4_session_table_buckets;
268 u32 configured_v4_session_table_memory;
269 u32 configured_v4_halfopen_table_buckets;
270 u32 configured_v4_halfopen_table_memory;
271 u32 configured_v6_session_table_buckets;
272 u32 configured_v6_session_table_memory;
273 u32 configured_v6_halfopen_table_buckets;
274 u32 configured_v6_halfopen_table_memory;
276 /** Transport table (preallocation) size parameters */
277 u32 local_endpoints_table_memory;
278 u32 local_endpoints_table_buckets;
280 /** Preallocate session config parameter */
281 u32 preallocated_sessions;
286 extern session_main_t session_main;
287 extern vlib_node_registration_t session_queue_node;
288 extern vlib_node_registration_t session_queue_process_node;
289 extern vlib_node_registration_t session_queue_pre_input_node;
291 typedef enum session_q_process_evt_
293 SESSION_Q_PROCESS_RUN_ON_MAIN = 1,
294 SESSION_Q_PROCESS_STOP
295 } session_q_process_evt_t;
297 #define TRANSPORT_PROTO_INVALID (session_main.last_transport_proto_type + 1)
298 #define TRANSPORT_N_PROTOS (session_main.last_transport_proto_type + 1)
301 session_evt_add_old (session_worker_t * wrk, session_evt_elt_t * elt)
303 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
304 clib_llist_elt (wrk->event_elts, wrk->old_head));
308 session_evt_add_head_old (session_worker_t * wrk, session_evt_elt_t * elt)
310 clib_llist_add (wrk->event_elts, evt_list, elt,
311 clib_llist_elt (wrk->event_elts, wrk->old_head));
316 session_evt_ctrl_data_alloc (session_worker_t * wrk)
318 session_evt_ctrl_data_t *data;
319 pool_get (wrk->ctrl_evts_data, data);
320 return (data - wrk->ctrl_evts_data);
323 static inline session_evt_elt_t *
324 session_evt_alloc_ctrl (session_worker_t * wrk)
326 session_evt_elt_t *elt;
327 clib_llist_get (wrk->event_elts, elt);
328 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
329 clib_llist_elt (wrk->event_elts, wrk->ctrl_head));
334 session_evt_ctrl_data (session_worker_t * wrk, session_evt_elt_t * elt)
336 return (void *) (pool_elt_at_index (wrk->ctrl_evts_data,
337 elt->evt.ctrl_data_index));
341 session_evt_ctrl_data_free (session_worker_t * wrk, session_evt_elt_t * elt)
343 ASSERT (elt->evt.event_type >= SESSION_CTRL_EVT_RPC);
344 pool_put_index (wrk->ctrl_evts_data, elt->evt.ctrl_data_index);
347 static inline session_evt_elt_t *
348 session_evt_alloc_new (session_worker_t * wrk)
350 session_evt_elt_t *elt;
351 clib_llist_get (wrk->event_elts, elt);
352 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
353 clib_llist_elt (wrk->event_elts, wrk->new_head));
357 static inline session_evt_elt_t *
358 session_evt_alloc_old (session_worker_t * wrk)
360 session_evt_elt_t *elt;
361 clib_llist_get (wrk->event_elts, elt);
362 clib_llist_add_tail (wrk->event_elts, evt_list, elt,
363 clib_llist_elt (wrk->event_elts, wrk->old_head));
367 int session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq);
369 session_t *session_alloc (u32 thread_index);
370 void session_free (session_t * s);
371 void session_free_w_fifos (session_t * s);
372 void session_cleanup_half_open (session_handle_t ho_handle);
373 u8 session_is_valid (u32 si, u8 thread_index);
375 always_inline session_t *
376 session_get (u32 si, u32 thread_index)
378 ASSERT (session_is_valid (si, thread_index));
379 return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
382 always_inline session_t *
383 session_get_if_valid (u64 si, u32 thread_index)
385 if (thread_index >= vec_len (session_main.wrk))
388 if (pool_is_free_index (session_main.wrk[thread_index].sessions, si))
391 ASSERT (session_is_valid (si, thread_index));
392 return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
395 always_inline session_t *
396 session_get_from_handle (session_handle_t handle)
398 session_main_t *smm = &session_main;
399 u32 session_index, thread_index;
400 session_parse_handle (handle, &session_index, &thread_index);
401 return pool_elt_at_index (smm->wrk[thread_index].sessions, session_index);
404 always_inline session_t *
405 session_get_from_handle_if_valid (session_handle_t handle)
407 u32 session_index, thread_index;
408 session_parse_handle (handle, &session_index, &thread_index);
409 return session_get_if_valid (session_index, thread_index);
412 u64 session_segment_handle (session_t * s);
415 * Get session from handle and avoid pool validation if no same thread
417 * Peekers are fine because pool grows with barrier (see @ref session_alloc)
419 always_inline session_t *
420 session_get_from_handle_safe (u64 handle)
422 u32 thread_index = session_thread_from_handle (handle);
423 session_worker_t *wrk = &session_main.wrk[thread_index];
425 if (thread_index == vlib_get_thread_index ())
427 return pool_elt_at_index (wrk->sessions,
428 session_index_from_handle (handle));
432 /* Don't use pool_elt_at index to avoid pool bitmap reallocs */
433 return wrk->sessions + session_index_from_handle (handle);
437 always_inline session_t *
438 session_clone_safe (u32 session_index, u32 thread_index)
440 u32 current_thread_index = vlib_get_thread_index (), new_index;
441 session_t *old_s, *new_s;
443 new_s = session_alloc (current_thread_index);
444 new_index = new_s->session_index;
445 /* Session pools are reallocated with barrier (see @ref session_alloc) */
446 old_s = session_main.wrk[thread_index].sessions + session_index;
447 clib_memcpy_fast (new_s, old_s, sizeof (*new_s));
448 new_s->thread_index = current_thread_index;
449 new_s->session_index = new_index;
453 int session_open (session_endpoint_cfg_t *sep, session_handle_t *rsh);
454 int session_listen (session_t * s, session_endpoint_cfg_t * sep);
455 int session_stop_listen (session_t * s);
456 void session_half_close (session_t *s);
457 void session_close (session_t * s);
458 void session_reset (session_t * s);
459 void session_transport_half_close (session_t *s);
460 void session_transport_close (session_t * s);
461 void session_transport_reset (session_t * s);
462 void session_transport_cleanup (session_t * s);
463 int session_send_io_evt_to_thread (svm_fifo_t * f,
464 session_evt_type_t evt_type);
465 int session_enqueue_notify (session_t * s);
466 int session_dequeue_notify (session_t * s);
467 int session_send_io_evt_to_thread_custom (void *data, u32 thread_index,
468 session_evt_type_t evt_type);
469 void session_send_rpc_evt_to_thread (u32 thread_index, void *fp,
471 void session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp,
473 void session_add_self_custom_tx_evt (transport_connection_t * tc,
475 void sesssion_reschedule_tx (transport_connection_t * tc);
476 transport_connection_t *session_get_transport (session_t * s);
477 void session_get_endpoint (session_t * s, transport_endpoint_t * tep,
479 int session_transport_attribute (session_t *s, u8 is_get,
480 transport_endpt_attr_t *attr);
482 u8 *format_session (u8 * s, va_list * args);
483 uword unformat_session (unformat_input_t * input, va_list * args);
484 uword unformat_transport_connection (unformat_input_t * input,
488 * Interface to transport protos
491 int session_enqueue_stream_connection (transport_connection_t * tc,
492 vlib_buffer_t * b, u32 offset,
493 u8 queue_event, u8 is_in_order);
494 int session_enqueue_dgram_connection (session_t * s,
495 session_dgram_hdr_t * hdr,
496 vlib_buffer_t * b, u8 proto,
498 int session_stream_connect_notify (transport_connection_t * tc,
499 session_error_t err);
500 int session_dgram_connect_notify (transport_connection_t * tc,
501 u32 old_thread_index,
502 session_t ** new_session);
503 int session_stream_accept_notify (transport_connection_t * tc);
504 void session_transport_closing_notify (transport_connection_t * tc);
505 void session_transport_delete_notify (transport_connection_t * tc);
506 void session_half_open_delete_notify (transport_connection_t *tc);
507 void session_half_open_migrate_notify (transport_connection_t *tc);
508 int session_half_open_migrated_notify (transport_connection_t *tc);
509 void session_transport_closed_notify (transport_connection_t * tc);
510 void session_transport_reset_notify (transport_connection_t * tc);
511 int session_stream_accept (transport_connection_t * tc, u32 listener_index,
512 u32 thread_index, u8 notify);
513 int session_dgram_accept (transport_connection_t * tc, u32 listener_index,
516 * Initialize session layer for given transport proto and ip version
518 * Allocates per session type (transport proto + ip version) data structures
519 * and adds arc from session queue node to session type output node.
521 * @param transport_proto transport proto to be registered
522 * @param vft virtual function table for transport
523 * @param is_ip4 flag that indicates if transports uses ipv4
524 * as underlying network layer
525 * @param output_node output node for transport
527 void session_register_transport (transport_proto_t transport_proto,
528 const transport_proto_vft_t * vft, u8 is_ip4,
530 transport_proto_t session_add_transport_proto (void);
531 void session_register_update_time_fn (session_update_time_fn fn, u8 is_add);
532 int session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
533 u32 offset, u32 max_bytes);
534 u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes);
537 session_set_state (session_t *s, session_state_t session_state)
539 s->session_state = session_state;
540 SESSION_EVT (SESSION_EVT_STATE_CHANGE, s);
544 transport_max_rx_enqueue (transport_connection_t * tc)
546 session_t *s = session_get (tc->s_index, tc->thread_index);
547 return svm_fifo_max_enqueue_prod (s->rx_fifo);
551 transport_max_tx_dequeue (transport_connection_t * tc)
553 session_t *s = session_get (tc->s_index, tc->thread_index);
554 return svm_fifo_max_dequeue_cons (s->tx_fifo);
558 transport_max_rx_dequeue (transport_connection_t * tc)
560 session_t *s = session_get (tc->s_index, tc->thread_index);
561 return svm_fifo_max_dequeue (s->rx_fifo);
565 transport_rx_fifo_size (transport_connection_t * tc)
567 session_t *s = session_get (tc->s_index, tc->thread_index);
568 return svm_fifo_size (s->rx_fifo);
572 transport_tx_fifo_size (transport_connection_t * tc)
574 session_t *s = session_get (tc->s_index, tc->thread_index);
575 return svm_fifo_size (s->tx_fifo);
579 transport_rx_fifo_has_ooo_data (transport_connection_t * tc)
581 session_t *s = session_get (tc->c_index, tc->thread_index);
582 return svm_fifo_has_ooo_data (s->rx_fifo);
586 transport_rx_fifo_req_deq_ntf (transport_connection_t *tc)
588 session_t *s = session_get (tc->s_index, tc->thread_index);
589 svm_fifo_add_want_deq_ntf (s->rx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
592 always_inline clib_time_type_t
593 transport_time_now (u32 thread_index)
595 return session_main.wrk[thread_index].last_vlib_time;
598 always_inline clib_us_time_t
599 transport_us_time_now (u32 thread_index)
601 return session_main.wrk[thread_index].last_vlib_us_time;
604 always_inline clib_time_type_t
605 transport_seconds_per_loop (u32 thread_index)
607 return session_main.wrk[thread_index].vm->seconds_per_loop;
611 transport_add_tx_event (transport_connection_t * tc)
613 session_t *s = session_get (tc->s_index, tc->thread_index);
614 if (svm_fifo_has_event (s->tx_fifo))
616 session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
620 transport_cl_thread (void)
622 return session_main.transport_cl_thread;
626 session_vlib_thread_is_cl_thread (void)
628 return (vlib_get_thread_index () == transport_cl_thread () ||
629 vlib_thread_is_main_w_barrier ());
637 listen_session_get_handle (session_t * s)
639 ASSERT (s->session_state == SESSION_STATE_LISTENING ||
640 session_get_transport_proto (s) == TRANSPORT_PROTO_QUIC);
641 return session_handle (s);
644 always_inline session_t *
645 listen_session_get_from_handle (session_handle_t handle)
647 return session_get_from_handle (handle);
651 listen_session_parse_handle (session_handle_t handle, u32 * index,
654 session_parse_handle (handle, index, thread_index);
657 always_inline session_t *
658 listen_session_alloc (u8 thread_index, session_type_t type)
661 s = session_alloc (thread_index);
662 s->session_type = type;
663 s->session_state = SESSION_STATE_LISTENING;
667 always_inline session_t *
668 listen_session_get (u32 ls_index)
670 return session_get (ls_index, 0);
674 listen_session_free (session_t * s)
676 ASSERT (!s->rx_fifo);
680 always_inline session_t *
681 ho_session_alloc (void)
684 ASSERT (session_vlib_thread_is_cl_thread ());
685 s = session_alloc (transport_cl_thread ());
686 s->session_state = SESSION_STATE_CONNECTING;
687 s->flags |= SESSION_F_HALF_OPEN;
691 always_inline session_t *
692 ho_session_get (u32 ho_index)
694 return session_get (ho_index, transport_cl_thread ());
698 ho_session_free (session_t *s)
700 ASSERT (!s->rx_fifo && s->thread_index == 0);
704 transport_connection_t *listen_session_get_transport (session_t * s);
707 * Session layer functions
710 always_inline session_main_t *
711 vnet_get_session_main ()
713 return &session_main;
716 always_inline session_worker_t *
717 session_main_get_worker (u32 thread_index)
719 return vec_elt_at_index (session_main.wrk, thread_index);
722 static inline session_worker_t *
723 session_main_get_worker_if_valid (u32 thread_index)
725 if (thread_index > vec_len (session_main.wrk))
727 return session_main_get_worker (thread_index);
730 always_inline svm_msg_q_t *
731 session_main_get_vpp_event_queue (u32 thread_index)
733 return session_main_get_worker (thread_index)->vpp_event_queue;
737 session_main_is_enabled ()
739 return session_main.is_enabled == 1;
743 session_worker_stat_error_inc (session_worker_t *wrk, int error, int value)
745 if ((-(error) >= 0 && -(error) < SESSION_N_ERRORS))
746 wrk->stats.errors[-error] += value;
748 SESSION_DBG ("unknown session counter");
752 session_stat_error_inc (int error, int value)
754 session_worker_t *wrk;
755 wrk = session_main_get_worker (vlib_get_thread_index ());
756 session_worker_stat_error_inc (wrk, error, value);
759 #define session_cli_return_if_not_enabled() \
761 if (!session_main.is_enabled) \
762 return clib_error_return (0, "session layer is not enabled"); \
765 int session_main_flush_enqueue_events (u8 proto, u32 thread_index);
766 int session_main_flush_all_enqueue_events (u8 transport_proto);
767 void session_queue_run_on_main_thread (vlib_main_t * vm);
770 * Add session node pending buffer with custom node
772 * @param thread_index worker thread expected to send the buffer
773 * @param bi buffer index
774 * @param next_node next node edge index for buffer. Edge to next node
778 session_add_pending_tx_buffer (u32 thread_index, u32 bi, u32 next_node)
780 session_worker_t *wrk = session_main_get_worker (thread_index);
781 vec_add1 (wrk->pending_tx_buffers, bi);
782 vec_add1 (wrk->pending_tx_nexts, next_node);
783 if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
784 vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
788 session_wrk_update_time (session_worker_t *wrk, f64 now)
790 wrk->last_vlib_time = now;
791 wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
794 void session_wrk_enable_adaptive_mode (session_worker_t *wrk);
795 fifo_segment_t *session_main_get_wrk_mqs_segment (void);
796 void session_node_enable_disable (u8 is_en);
797 clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);
798 void session_wrk_handle_evts_main_rpc (void *);
800 session_t *session_alloc_for_connection (transport_connection_t * tc);
801 session_t *session_alloc_for_half_open (transport_connection_t *tc);
803 typedef void (pool_safe_realloc_rpc_fn) (void *rpc_args);
807 u8 ph[STRUCT_OFFSET_OF (pool_header_t, max_elts) + 4];
809 } pool_safe_realloc_header_t;
811 STATIC_ASSERT_SIZEOF (pool_safe_realloc_header_t, sizeof (pool_header_t));
813 #define POOL_REALLOC_SAFE_ELT_THRESH 32
815 #define pool_realloc_flag(PH) \
816 ((pool_safe_realloc_header_t *) pool_header (PH))->flag
818 typedef struct pool_realloc_rpc_args_
823 } pool_realloc_rpc_args_t;
826 pool_program_safe_realloc_rpc (void *args)
828 vlib_main_t *vm = vlib_get_main ();
829 u32 free_elts, max_elts, n_alloc;
830 pool_realloc_rpc_args_t *pra;
832 ASSERT (vlib_get_thread_index () == 0);
833 pra = (pool_realloc_rpc_args_t *) args;
835 vlib_worker_thread_barrier_sync (vm);
837 free_elts = _pool_free_elts (*pra->pool, pra->elt_size);
838 if (free_elts < POOL_REALLOC_SAFE_ELT_THRESH)
840 max_elts = _vec_max_len (*pra->pool, pra->elt_size);
841 n_alloc = clib_max (2 * max_elts, POOL_REALLOC_SAFE_ELT_THRESH);
842 _pool_alloc (pra->pool, n_alloc, pra->align, 0, pra->elt_size);
844 pool_realloc_flag (*pra->pool) = 0;
845 clib_mem_free (args);
847 vlib_worker_thread_barrier_release (vm);
851 pool_program_safe_realloc (void **p, u32 elt_size, u32 align)
853 pool_realloc_rpc_args_t *pra;
855 /* Reuse pad as a realloc flag */
856 if (pool_realloc_flag (*p))
859 pra = clib_mem_alloc (sizeof (*pra));
861 pra->elt_size = elt_size;
863 pool_realloc_flag (*p) = 1;
865 session_send_rpc_evt_to_thread (0 /* thread index */,
866 pool_program_safe_realloc_rpc, pra);
869 #define pool_needs_realloc(P) \
871 (vec_len (pool_header (P)->free_indices) < POOL_REALLOC_SAFE_ELT_THRESH && \
872 pool_free_elts (P) < POOL_REALLOC_SAFE_ELT_THRESH))
874 #define pool_get_aligned_safe(P, E, align) \
877 if (PREDICT_FALSE (pool_needs_realloc (P))) \
879 if (PREDICT_FALSE (!(P))) \
881 pool_alloc_aligned (P, POOL_REALLOC_SAFE_ELT_THRESH, align); \
883 else if (PREDICT_FALSE (!pool_free_elts (P))) \
885 vlib_workers_sync (); \
886 pool_alloc_aligned (P, pool_max_len (P), align); \
887 vlib_workers_continue (); \
888 ALWAYS_ASSERT (pool_free_elts (P) > 0); \
892 pool_program_safe_realloc ((void **) &(P), sizeof ((P)[0]), \
893 _vec_align (P, align)); \
896 pool_get_aligned (P, E, align); \
900 #endif /* __included_session_h__ */
903 * fd.io coding-style-patch-verification: ON
906 * eval: (c-set-style "gnu")