2 * Copyright (c) 2019 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (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.
16 #include <vcl/vcl_locked.h>
17 #include <vcl/vcl_private.h>
19 typedef struct vls_shared_data_
23 u32 *workers_subscribed;
24 clib_bitmap_t *listeners;
27 typedef struct vcl_locked_session_
33 u32 shared_data_index;
34 /** VCL session owned by different workers because of migration */
35 u32 owner_vcl_wrk_index;
36 uword *vcl_wrk_index_to_session_index;
37 } vcl_locked_session_t;
39 typedef struct vls_worker_
41 clib_rwlock_t sh_to_vlsh_table_lock; /** valid for multithread workers */
42 vcl_locked_session_t *vls_pool;
43 uword *session_handle_to_vlsh_table;
47 typedef struct vls_local_
50 volatile int vls_mt_n_threads;
51 pthread_mutex_t vls_mt_mq_mlock;
52 pthread_mutex_t vls_mt_spool_mlock;
53 volatile u8 select_mp_check;
54 } vls_process_local_t;
56 static vls_process_local_t vls_local;
57 static vls_process_local_t *vlsl = &vls_local;
59 typedef struct vls_main_
61 vls_worker_t *workers;
62 clib_rwlock_t vls_table_lock;
63 /** Pool of data shared by sessions owned by different workers */
64 vls_shared_data_t *shared_data_pool;
65 clib_rwlock_t shared_data_lock;
66 /** Lock to protect rpc among workers */
67 clib_spinlock_t worker_rpc_lock;
75 VLS_RPC_STATE_SUCCESS,
76 VLS_RPC_STATE_SESSION_NOT_EXIST,
79 typedef enum vls_rpc_msg_type_
81 VLS_RPC_CLONE_AND_SHARE,
85 typedef struct vls_rpc_msg_
91 typedef struct vls_clone_and_share_msg_
93 u32 vls_index; /**< vls to be shared */
94 u32 session_index; /**< vcl session to be shared */
95 u32 origin_vls_wrk; /**< vls worker that initiated the rpc */
96 u32 origin_vls_index; /**< vls session of the originator */
97 u32 origin_vcl_wrk; /**< vcl worker that initiated the rpc */
98 u32 origin_session_index; /**< vcl session of the originator */
99 } vls_clone_and_share_msg_t;
101 typedef struct vls_sess_cleanup_msg_
103 u32 session_index; /**< vcl session to be cleaned */
104 u32 origin_vcl_wrk; /**< worker that initiated the rpc */
105 } vls_sess_cleanup_msg_t;
107 void vls_send_session_cleanup_rpc (vcl_worker_t * wrk,
108 u32 dst_wrk_index, u32 dst_session_index);
109 void vls_send_clone_and_share_rpc (vcl_worker_t *wrk, u32 origin_vls_index,
110 u32 session_index, u32 vls_wrk_index,
111 u32 dst_wrk_index, u32 dst_vls_index,
112 u32 dst_session_index);
115 vls_get_worker_index (void)
117 if (vls_mt_wrk_supported ())
118 return vlsl->vls_wrk_index;
120 return vcl_get_worker_index ();
124 vls_shared_data_alloc (void)
126 vls_shared_data_t *vls_shd;
129 clib_rwlock_writer_lock (&vlsm->shared_data_lock);
130 pool_get_zero (vlsm->shared_data_pool, vls_shd);
131 clib_spinlock_init (&vls_shd->lock);
132 shd_index = vls_shd - vlsm->shared_data_pool;
133 clib_rwlock_writer_unlock (&vlsm->shared_data_lock);
139 vls_shared_data_index (vls_shared_data_t * vls_shd)
141 return vls_shd - vlsm->shared_data_pool;
145 vls_shared_data_get (u32 shd_index)
147 if (pool_is_free_index (vlsm->shared_data_pool, shd_index))
149 return pool_elt_at_index (vlsm->shared_data_pool, shd_index);
153 vls_shared_data_free (u32 shd_index)
155 vls_shared_data_t *vls_shd;
157 clib_rwlock_writer_lock (&vlsm->shared_data_lock);
158 vls_shd = vls_shared_data_get (shd_index);
159 clib_spinlock_free (&vls_shd->lock);
160 clib_bitmap_free (vls_shd->listeners);
161 vec_free (vls_shd->workers_subscribed);
162 pool_put (vlsm->shared_data_pool, vls_shd);
163 clib_rwlock_writer_unlock (&vlsm->shared_data_lock);
167 vls_shared_data_pool_rlock (void)
169 clib_rwlock_reader_lock (&vlsm->shared_data_lock);
173 vls_shared_data_pool_runlock (void)
175 clib_rwlock_reader_unlock (&vlsm->shared_data_lock);
179 vls_mt_table_rlock (void)
181 if (vlsl->vls_mt_n_threads > 1)
182 clib_rwlock_reader_lock (&vlsm->vls_table_lock);
186 vls_mt_table_runlock (void)
188 if (vlsl->vls_mt_n_threads > 1)
189 clib_rwlock_reader_unlock (&vlsm->vls_table_lock);
193 vls_mt_table_wlock (void)
195 if (vlsl->vls_mt_n_threads > 1)
196 clib_rwlock_writer_lock (&vlsm->vls_table_lock);
200 vls_mt_table_wunlock (void)
202 if (vlsl->vls_mt_n_threads > 1)
203 clib_rwlock_writer_unlock (&vlsm->vls_table_lock);
216 VLS_MT_LOCK_MQ = 1 << 0,
217 VLS_MT_LOCK_SPOOL = 1 << 1
218 } vls_mt_lock_type_t;
223 vlsl->vls_mt_n_threads += 1;
225 /* If multi-thread workers are supported, for each new thread register a new
226 * vcl worker with vpp. Otherwise, all threads use the same vcl worker, so
227 * update the vcl worker's thread local worker index variable */
228 if (vls_mt_wrk_supported ())
230 if (vppcom_worker_register () != VPPCOM_OK)
231 VERR ("failed to register worker");
234 vcl_set_worker_index (vlsl->vls_wrk_index);
238 vls_mt_mq_lock (void)
240 pthread_mutex_lock (&vlsl->vls_mt_mq_mlock);
244 vls_mt_mq_unlock (void)
246 pthread_mutex_unlock (&vlsl->vls_mt_mq_mlock);
250 vls_mt_spool_lock (void)
252 pthread_mutex_lock (&vlsl->vls_mt_spool_mlock);
256 vls_mt_create_unlock (void)
258 pthread_mutex_unlock (&vlsl->vls_mt_spool_mlock);
262 vls_mt_locks_init (void)
264 pthread_mutex_init (&vlsl->vls_mt_mq_mlock, NULL);
265 pthread_mutex_init (&vlsl->vls_mt_spool_mlock, NULL);
269 vls_is_shared (vcl_locked_session_t * vls)
271 return (vls->shared_data_index != ~0);
275 vls_lock (vcl_locked_session_t * vls)
277 if ((vlsl->vls_mt_n_threads > 1) || vls_is_shared (vls))
278 clib_spinlock_lock (&vls->lock);
282 vls_unlock (vcl_locked_session_t * vls)
284 if ((vlsl->vls_mt_n_threads > 1) || vls_is_shared (vls))
285 clib_spinlock_unlock (&vls->lock);
288 static inline vcl_session_handle_t
289 vls_to_sh (vcl_locked_session_t * vls)
291 return vcl_session_handle_from_index (vls->session_index);
294 static inline vcl_session_handle_t
295 vls_to_sh_tu (vcl_locked_session_t * vls)
297 vcl_session_handle_t sh;
298 sh = vls_to_sh (vls);
299 vls_mt_table_runlock ();
303 static vls_worker_t *
304 vls_worker_get_current (void)
306 return pool_elt_at_index (vlsm->workers, vls_get_worker_index ());
310 vls_worker_alloc (void)
314 pool_get_zero (vlsm->workers, wrk);
315 if (vls_mt_wrk_supported ())
316 clib_rwlock_init (&wrk->sh_to_vlsh_table_lock);
317 wrk->wrk_index = vcl_get_worker_index ();
321 vls_worker_free (vls_worker_t * wrk)
323 hash_free (wrk->session_handle_to_vlsh_table);
324 if (vls_mt_wrk_supported ())
325 clib_rwlock_free (&wrk->sh_to_vlsh_table_lock);
326 pool_free (wrk->vls_pool);
327 pool_put (vlsm->workers, wrk);
330 static vls_worker_t *
331 vls_worker_get (u32 wrk_index)
333 if (pool_is_free_index (vlsm->workers, wrk_index))
335 return pool_elt_at_index (vlsm->workers, wrk_index);
339 vls_sh_to_vlsh_table_add (vls_worker_t *wrk, vcl_session_handle_t sh, u32 vlsh)
341 if (vls_mt_wrk_supported ())
342 clib_rwlock_writer_lock (&wrk->sh_to_vlsh_table_lock);
343 hash_set (wrk->session_handle_to_vlsh_table, sh, vlsh);
344 if (vls_mt_wrk_supported ())
345 clib_rwlock_writer_unlock (&wrk->sh_to_vlsh_table_lock);
349 vls_sh_to_vlsh_table_del (vls_worker_t *wrk, vcl_session_handle_t sh)
351 if (vls_mt_wrk_supported ())
352 clib_rwlock_writer_lock (&wrk->sh_to_vlsh_table_lock);
353 hash_unset (wrk->session_handle_to_vlsh_table, sh);
354 if (vls_mt_wrk_supported ())
355 clib_rwlock_writer_unlock (&wrk->sh_to_vlsh_table_lock);
359 vls_sh_to_vlsh_table_get (vls_worker_t *wrk, vcl_session_handle_t sh)
361 if (vls_mt_wrk_supported ())
362 clib_rwlock_reader_lock (&wrk->sh_to_vlsh_table_lock);
363 uword *vlshp = hash_get (wrk->session_handle_to_vlsh_table, sh);
364 if (vls_mt_wrk_supported ())
365 clib_rwlock_reader_unlock (&wrk->sh_to_vlsh_table_lock);
370 vls_alloc (vcl_session_handle_t sh)
372 vls_worker_t *wrk = vls_worker_get_current ();
373 vcl_locked_session_t *vls;
375 vls_mt_table_wlock ();
377 pool_get_zero (wrk->vls_pool, vls);
378 vls->session_index = vppcom_session_index (sh);
379 vls->worker_index = vppcom_session_worker (sh);
380 vls->vls_index = vls - wrk->vls_pool;
381 vls->shared_data_index = ~0;
382 vls_sh_to_vlsh_table_add (wrk, sh, vls->vls_index);
383 if (vls_mt_wrk_supported ())
385 hash_set (vls->vcl_wrk_index_to_session_index, vls->worker_index,
387 vls->owner_vcl_wrk_index = vls->worker_index;
389 clib_spinlock_init (&vls->lock);
391 vls_mt_table_wunlock ();
392 return vls->vls_index;
395 static vcl_locked_session_t *
396 vls_get (vls_handle_t vlsh)
398 vls_worker_t *wrk = vls_worker_get_current ();
399 if (pool_is_free_index (wrk->vls_pool, vlsh))
401 return pool_elt_at_index (wrk->vls_pool, vlsh);
405 vls_free (vcl_locked_session_t * vls)
407 vls_worker_t *wrk = vls_worker_get_current ();
410 vls_sh_to_vlsh_table_del (
411 wrk, vcl_session_handle_from_index (vls->session_index));
412 clib_spinlock_free (&vls->lock);
413 pool_put (wrk->vls_pool, vls);
416 static vcl_locked_session_t *
417 vls_get_and_lock (vls_handle_t vlsh)
419 vls_worker_t *wrk = vls_worker_get_current ();
420 vcl_locked_session_t *vls;
421 if (pool_is_free_index (wrk->vls_pool, vlsh))
423 vls = pool_elt_at_index (wrk->vls_pool, vlsh);
428 static vcl_locked_session_t *
429 vls_get_w_dlock (vls_handle_t vlsh)
431 vcl_locked_session_t *vls;
432 vls_mt_table_rlock ();
433 vls = vls_get_and_lock (vlsh);
435 vls_mt_table_runlock ();
440 vls_get_and_unlock (vls_handle_t vlsh)
442 vcl_locked_session_t *vls;
443 vls_mt_table_rlock ();
444 vls = vls_get (vlsh);
446 vls_mt_table_runlock ();
450 vls_dunlock (vcl_locked_session_t * vls)
453 vls_mt_table_runlock ();
456 static vcl_locked_session_t *
457 vls_session_get (vls_worker_t * wrk, u32 vls_index)
459 if (pool_is_free_index (wrk->vls_pool, vls_index))
461 return pool_elt_at_index (wrk->vls_pool, vls_index);
465 vlsh_to_sh (vls_handle_t vlsh)
467 vcl_locked_session_t *vls;
470 vls = vls_get_w_dlock (vlsh);
472 return INVALID_SESSION_ID;
473 rv = vls_to_sh (vls);
479 vlsh_to_session_index (vls_handle_t vlsh)
481 vcl_session_handle_t sh;
482 sh = vlsh_to_sh (vlsh);
483 return vppcom_session_index (sh);
487 vls_si_wi_to_vlsh (u32 session_index, u32 vcl_wrk_index)
489 vls_worker_t *wrk = vls_worker_get_current ();
490 uword *vlshp = vls_sh_to_vlsh_table_get (
492 vcl_session_handle_from_wrk_session_index (session_index, vcl_wrk_index));
494 return vlshp ? *vlshp : VLS_INVALID_HANDLE;
498 vls_session_index_to_vlsh (uint32_t session_index)
502 vls_mt_table_rlock ();
503 vlsh = vls_si_wi_to_vlsh (session_index, vcl_get_worker_index ());
504 vls_mt_table_runlock ();
510 vls_is_shared_by_wrk (vcl_locked_session_t * vls, u32 wrk_index)
512 vls_shared_data_t *vls_shd;
515 if (vls->shared_data_index == ~0)
518 vls_shared_data_pool_rlock ();
520 vls_shd = vls_shared_data_get (vls->shared_data_index);
521 clib_spinlock_lock (&vls_shd->lock);
523 for (i = 0; i < vec_len (vls_shd->workers_subscribed); i++)
524 if (vls_shd->workers_subscribed[i] == wrk_index)
526 clib_spinlock_unlock (&vls_shd->lock);
527 vls_shared_data_pool_runlock ();
530 clib_spinlock_unlock (&vls_shd->lock);
532 vls_shared_data_pool_runlock ();
537 vls_listener_wrk_set (vcl_locked_session_t * vls, u32 wrk_index, u8 is_active)
539 vls_shared_data_t *vls_shd;
541 if (vls->shared_data_index == ~0)
543 clib_warning ("not a shared session");
547 vls_shared_data_pool_rlock ();
549 vls_shd = vls_shared_data_get (vls->shared_data_index);
551 clib_spinlock_lock (&vls_shd->lock);
552 clib_bitmap_set (vls_shd->listeners, wrk_index, is_active);
553 clib_spinlock_unlock (&vls_shd->lock);
555 vls_shared_data_pool_runlock ();
559 vls_shared_get_owner (vcl_locked_session_t * vls)
561 vls_shared_data_t *vls_shd;
564 vls_shared_data_pool_rlock ();
566 vls_shd = vls_shared_data_get (vls->shared_data_index);
567 owner_wrk = vls_shd->owner_wrk_index;
569 vls_shared_data_pool_runlock ();
575 vls_listener_wrk_is_active (vcl_locked_session_t * vls, u32 wrk_index)
577 vls_shared_data_t *vls_shd;
580 if (vls->shared_data_index == ~0)
582 clib_warning ("not a shared session");
586 vls_shared_data_pool_rlock ();
588 vls_shd = vls_shared_data_get (vls->shared_data_index);
590 clib_spinlock_lock (&vls_shd->lock);
591 is_set = clib_bitmap_get (vls_shd->listeners, wrk_index);
592 clib_spinlock_unlock (&vls_shd->lock);
594 vls_shared_data_pool_runlock ();
596 return (is_set == 1);
600 vls_listener_wrk_start_listen (vcl_locked_session_t * vls, u32 wrk_index)
602 vppcom_session_listen (vls_to_sh (vls), ~0);
603 vls_listener_wrk_set (vls, wrk_index, 1 /* is_active */ );
607 vls_listener_wrk_stop_listen (vcl_locked_session_t * vls, u32 wrk_index)
612 wrk = vcl_worker_get (wrk_index);
613 s = vcl_session_get (wrk, vls->session_index);
614 if (s->session_state != VCL_STATE_LISTEN)
616 vcl_send_session_unlisten (wrk, s);
617 s->session_state = VCL_STATE_LISTEN_NO_MQ;
618 vls_listener_wrk_set (vls, wrk_index, 0 /* is_active */ );
622 vls_shared_data_subscriber_position (vls_shared_data_t * vls_shd,
627 for (i = 0; i < vec_len (vls_shd->workers_subscribed); i++)
629 if (vls_shd->workers_subscribed[i] == wrk_index)
636 vls_unshare_session (vcl_locked_session_t * vls, vcl_worker_t * wrk)
638 vls_shared_data_t *vls_shd;
639 int do_disconnect, pos;
643 if (vls->shared_data_index == ~0)
646 s = vcl_session_get (wrk, vls->session_index);
647 if (s->session_state == VCL_STATE_LISTEN)
648 vls_listener_wrk_set (vls, wrk->wrk_index, 0 /* is_active */ );
650 vls_shared_data_pool_rlock ();
652 vls_shd = vls_shared_data_get (vls->shared_data_index);
653 clib_spinlock_lock (&vls_shd->lock);
655 pos = vls_shared_data_subscriber_position (vls_shd, wrk->wrk_index);
658 clib_warning ("worker %u not subscribed for vls %u", wrk->wrk_index,
664 * Unsubscribe from share data and fifos
668 svm_fifo_del_subscriber (s->rx_fifo, wrk->vpp_wrk_index);
669 svm_fifo_del_subscriber (s->tx_fifo, wrk->vpp_wrk_index);
671 vec_del1 (vls_shd->workers_subscribed, pos);
676 n_subscribers = vec_len (vls_shd->workers_subscribed);
677 do_disconnect = s->session_state == VCL_STATE_LISTEN || !n_subscribers;
678 vcl_session_cleanup (wrk, s, vcl_session_handle (s), do_disconnect);
681 * No subscriber left, cleanup shared data
685 u32 shd_index = vls_shared_data_index (vls_shd);
687 clib_spinlock_unlock (&vls_shd->lock);
688 vls_shared_data_pool_runlock ();
690 vls_shared_data_free (shd_index);
692 /* All locks have been dropped */
696 /* Return, if this is not the owning worker */
697 if (vls_shd->owner_wrk_index != wrk->wrk_index)
700 ASSERT (vec_len (vls_shd->workers_subscribed));
703 * Check if we can change owner or close
705 vls_shd->owner_wrk_index = vls_shd->workers_subscribed[0];
706 vcl_send_session_worker_update (wrk, s, vls_shd->owner_wrk_index);
708 /* XXX is this still needed? */
709 if (vec_len (vls_shd->workers_subscribed) > 1)
710 clib_warning ("more workers need to be updated");
714 clib_spinlock_unlock (&vls_shd->lock);
715 vls_shared_data_pool_runlock ();
721 vls_init_share_session (vls_worker_t * vls_wrk, vcl_locked_session_t * vls)
723 vls_shared_data_t *vls_shd;
725 u32 vls_shd_index = vls_shared_data_alloc ();
727 vls_shared_data_pool_rlock ();
729 vls_shd = vls_shared_data_get (vls_shd_index);
730 vls_shd->owner_wrk_index = vls_wrk->wrk_index;
731 vls->shared_data_index = vls_shd_index;
732 vec_add1 (vls_shd->workers_subscribed, vls_wrk->wrk_index);
734 vls_shared_data_pool_runlock ();
738 vls_share_session (vls_worker_t * vls_wrk, vcl_locked_session_t * vls)
740 vcl_worker_t *vcl_wrk = vcl_worker_get (vls_wrk->wrk_index);
741 vls_shared_data_t *vls_shd;
744 s = vcl_session_get (vcl_wrk, vls->session_index);
747 clib_warning ("wrk %u session %u vls %u NOT AVAILABLE",
748 vcl_wrk->wrk_index, vls->session_index, vls->vls_index);
752 ASSERT (vls->shared_data_index != ~0);
754 /* Reinit session lock */
755 clib_spinlock_init (&vls->lock);
757 vls_shared_data_pool_rlock ();
759 vls_shd = vls_shared_data_get (vls->shared_data_index);
761 clib_spinlock_lock (&vls_shd->lock);
762 vec_add1 (vls_shd->workers_subscribed, vls_wrk->wrk_index);
763 clib_spinlock_unlock (&vls_shd->lock);
765 vls_shared_data_pool_runlock ();
769 svm_fifo_add_subscriber (s->rx_fifo, vcl_wrk->vpp_wrk_index);
770 svm_fifo_add_subscriber (s->tx_fifo, vcl_wrk->vpp_wrk_index);
772 else if (s->session_state == VCL_STATE_LISTEN)
774 s->session_state = VCL_STATE_LISTEN_NO_MQ;
779 vls_share_sessions (vls_worker_t * vls_parent_wrk, vls_worker_t * vls_wrk)
781 vcl_locked_session_t *vls, *parent_vls;
784 pool_foreach (vls, vls_wrk->vls_pool) {
785 /* Initialize sharing on parent session */
786 if (vls->shared_data_index == ~0)
788 parent_vls = vls_session_get (vls_parent_wrk, vls->vls_index);
789 vls_init_share_session (vls_parent_wrk, parent_vls);
790 vls->shared_data_index = parent_vls->shared_data_index;
792 vls_share_session (vls_wrk, vls);
798 vls_worker_copy_on_fork (vcl_worker_t * parent_wrk)
800 vls_worker_t *vls_wrk = vls_worker_get_current (), *vls_parent_wrk;
801 vcl_worker_t *wrk = vcl_worker_get_current ();
802 u32 vls_index, session_index, wrk_index;
803 vcl_session_handle_t sh;
808 wrk->sessions = pool_dup (parent_wrk->sessions);
809 wrk->session_index_by_vpp_handles =
810 hash_dup (parent_wrk->session_index_by_vpp_handles);
815 vls_parent_wrk = vls_worker_get (parent_wrk->wrk_index);
817 hash_foreach (sh, vls_index, vls_parent_wrk->session_handle_to_vlsh_table,
819 vcl_session_handle_parse (sh, &wrk_index, &session_index);
820 hash_set (vls_wrk->session_handle_to_vlsh_table,
821 vcl_session_handle_from_index (session_index), vls_index);
824 vls_wrk->vls_pool = pool_dup (vls_parent_wrk->vls_pool);
826 vls_share_sessions (vls_parent_wrk, vls_wrk);
830 vls_mt_acq_locks (vcl_locked_session_t * vls, vls_mt_ops_t op, int *locks_acq)
832 vcl_worker_t *wrk = vcl_worker_get_current ();
833 vcl_session_t *s = 0;
838 s = vcl_session_get (wrk, vls->session_index);
839 if (PREDICT_FALSE (!s))
841 is_nonblk = vcl_session_has_attr (s, VCL_SESS_ATTR_NONBLOCK);
848 is_nonblk = vcl_session_read_ready (s) != 0;
852 *locks_acq |= VLS_MT_LOCK_MQ;
855 case VLS_MT_OP_WRITE:
858 is_nonblk = vcl_session_write_ready (s) != 0;
862 *locks_acq |= VLS_MT_LOCK_MQ;
865 case VLS_MT_OP_XPOLL:
867 *locks_acq |= VLS_MT_LOCK_MQ;
869 case VLS_MT_OP_SPOOL:
870 vls_mt_spool_lock ();
871 *locks_acq |= VLS_MT_LOCK_SPOOL;
879 vls_mt_rel_locks (int locks_acq)
881 if (locks_acq & VLS_MT_LOCK_MQ)
883 if (locks_acq & VLS_MT_LOCK_SPOOL)
884 vls_mt_create_unlock ();
888 vls_mt_session_should_migrate (vcl_locked_session_t * vls)
890 return (vls_mt_wrk_supported ()
891 && vls->worker_index != vcl_get_worker_index ());
894 static vcl_locked_session_t *
895 vls_mt_session_migrate (vcl_locked_session_t *vls)
897 u32 wrk_index = vcl_get_worker_index ();
899 vls_worker_t *vls_wrk = vls_worker_get_current ();
900 u32 src_sid, sid, vls_index, own_vcl_wrk_index;
901 vcl_session_t *session;
904 ASSERT (vls_mt_wrk_supported () && vls->worker_index != wrk_index);
907 * VCL session on current vcl worker already allocated. Update current
908 * owner worker and index and return
910 if ((p = hash_get (vls->vcl_wrk_index_to_session_index, wrk_index)))
912 vls->worker_index = wrk_index;
913 vls->session_index = (u32) p[0];
918 * Ask vcl worker that owns the original vcl session to clone it into
919 * current vcl worker session pool
922 if (!(p = hash_get (vls->vcl_wrk_index_to_session_index,
923 vls->owner_vcl_wrk_index)))
925 VERR ("session in owner worker(%u) is free", vls->owner_vcl_wrk_index);
928 vls_mt_table_runlock ();
932 src_sid = (u32) p[0];
933 wrk = vcl_worker_get_current ();
934 session = vcl_session_alloc (wrk);
935 sid = session->session_index;
936 VDBG (1, "migrate session of worker (session): %u (%u) -> %u (%u)",
937 vls->owner_vcl_wrk_index, src_sid, wrk_index, sid);
939 /* Drop lock to prevent dead lock when dst wrk trying to get lock. */
940 vls_index = vls->vls_index;
941 own_vcl_wrk_index = vls->owner_vcl_wrk_index;
943 vls_mt_table_runlock ();
944 vls_send_clone_and_share_rpc (wrk, vls_index, sid, vls_get_worker_index (),
945 own_vcl_wrk_index, vls_index, src_sid);
947 if (PREDICT_FALSE (wrk->rpc_done == VLS_RPC_STATE_SESSION_NOT_EXIST))
949 VWRN ("session %u not exist", src_sid);
952 else if (PREDICT_FALSE (wrk->rpc_done == VLS_RPC_STATE_INIT))
954 VWRN ("failed to wait rpc response");
957 else if (PREDICT_FALSE ((session->flags & VCL_SESSION_F_IS_VEP) &&
958 session->vep.next_sh != ~0))
960 VERR ("can't migrate nonempty epoll session");
964 else if (PREDICT_FALSE (!(session->flags & VCL_SESSION_F_IS_VEP) &&
965 session->session_state != VCL_STATE_CLOSED))
967 VERR ("migrate NOT supported, session_status (%u)",
968 session->session_state);
973 vls = vls_get_w_dlock (vls_index);
974 if (PREDICT_FALSE (!vls))
976 VWRN ("failed to get vls %u", vls_index);
980 session->session_index = sid;
981 vls->worker_index = wrk_index;
982 vls->session_index = sid;
983 hash_set (vls->vcl_wrk_index_to_session_index, wrk_index, sid);
984 vls_sh_to_vlsh_table_add (vls_wrk, vcl_session_handle (session),
989 vcl_session_free (wrk, session);
996 if (PREDICT_FALSE (vcl_get_worker_index () == ~0))
1000 #define vls_mt_guard(_vls, _op) \
1001 int _locks_acq = 0; \
1002 if (vls_mt_wrk_supported ()) \
1004 if (PREDICT_FALSE (_vls && \
1005 ((vcl_locked_session_t *) _vls)->worker_index != \
1006 vcl_get_worker_index ())) \
1008 _vls = vls_mt_session_migrate (_vls); \
1009 if (PREDICT_FALSE (!_vls)) \
1010 return VPPCOM_EBADFD; \
1015 if (PREDICT_FALSE (vlsl->vls_mt_n_threads > 1)) \
1016 vls_mt_acq_locks (_vls, _op, &_locks_acq); \
1019 #define vls_mt_unguard() \
1020 if (PREDICT_FALSE (_locks_acq)) \
1021 vls_mt_rel_locks (_locks_acq)
1024 vls_write (vls_handle_t vlsh, void *buf, size_t nbytes)
1026 vcl_locked_session_t *vls;
1030 if (!(vls = vls_get_w_dlock (vlsh)))
1031 return VPPCOM_EBADFD;
1033 vls_mt_guard (vls, VLS_MT_OP_WRITE);
1034 rv = vppcom_session_write (vls_to_sh_tu (vls), buf, nbytes);
1036 vls_get_and_unlock (vlsh);
1041 vls_write_msg (vls_handle_t vlsh, void *buf, size_t nbytes)
1043 vcl_locked_session_t *vls;
1047 if (!(vls = vls_get_w_dlock (vlsh)))
1048 return VPPCOM_EBADFD;
1049 vls_mt_guard (vls, VLS_MT_OP_WRITE);
1050 rv = vppcom_session_write_msg (vls_to_sh_tu (vls), buf, nbytes);
1052 vls_get_and_unlock (vlsh);
1057 vls_sendto (vls_handle_t vlsh, void *buf, int buflen, int flags,
1058 vppcom_endpt_t * ep)
1060 vcl_locked_session_t *vls;
1064 if (!(vls = vls_get_w_dlock (vlsh)))
1065 return VPPCOM_EBADFD;
1066 vls_mt_guard (vls, VLS_MT_OP_WRITE);
1067 rv = vppcom_session_sendto (vls_to_sh_tu (vls), buf, buflen, flags, ep);
1069 vls_get_and_unlock (vlsh);
1074 vls_read (vls_handle_t vlsh, void *buf, size_t nbytes)
1076 vcl_locked_session_t *vls;
1080 if (!(vls = vls_get_w_dlock (vlsh)))
1081 return VPPCOM_EBADFD;
1082 vls_mt_guard (vls, VLS_MT_OP_READ);
1083 rv = vppcom_session_read (vls_to_sh_tu (vls), buf, nbytes);
1085 vls_get_and_unlock (vlsh);
1090 vls_recvfrom (vls_handle_t vlsh, void *buffer, uint32_t buflen, int flags,
1091 vppcom_endpt_t * ep)
1093 vcl_locked_session_t *vls;
1097 if (!(vls = vls_get_w_dlock (vlsh)))
1098 return VPPCOM_EBADFD;
1099 vls_mt_guard (vls, VLS_MT_OP_READ);
1100 rv = vppcom_session_recvfrom (vls_to_sh_tu (vls), buffer, buflen, flags,
1103 vls_get_and_unlock (vlsh);
1108 vls_attr (vls_handle_t vlsh, uint32_t op, void *buffer, uint32_t * buflen)
1110 vcl_locked_session_t *vls;
1114 if (!(vls = vls_get_w_dlock (vlsh)))
1115 return VPPCOM_EBADFD;
1116 if (vls_mt_session_should_migrate (vls))
1118 vls = vls_mt_session_migrate (vls);
1119 if (PREDICT_FALSE (!vls))
1120 return VPPCOM_EBADFD;
1122 rv = vppcom_session_attr (vls_to_sh_tu (vls), op, buffer, buflen);
1123 vls_get_and_unlock (vlsh);
1128 vls_bind (vls_handle_t vlsh, vppcom_endpt_t * ep)
1130 vcl_locked_session_t *vls;
1134 if (!(vls = vls_get_w_dlock (vlsh)))
1135 return VPPCOM_EBADFD;
1136 rv = vppcom_session_bind (vls_to_sh_tu (vls), ep);
1137 vls_get_and_unlock (vlsh);
1142 vls_listen (vls_handle_t vlsh, int q_len)
1144 vcl_locked_session_t *vls;
1148 if (!(vls = vls_get_w_dlock (vlsh)))
1149 return VPPCOM_EBADFD;
1150 vls_mt_guard (vls, VLS_MT_OP_XPOLL);
1151 rv = vppcom_session_listen (vls_to_sh_tu (vls), q_len);
1153 vls_get_and_unlock (vlsh);
1158 vls_connect (vls_handle_t vlsh, vppcom_endpt_t * server_ep)
1160 vcl_locked_session_t *vls;
1164 if (!(vls = vls_get_w_dlock (vlsh)))
1165 return VPPCOM_EBADFD;
1166 vls_mt_guard (vls, VLS_MT_OP_XPOLL);
1167 rv = vppcom_session_connect (vls_to_sh_tu (vls), server_ep);
1169 vls_get_and_unlock (vlsh);
1174 vls_mp_checks (vcl_locked_session_t * vls, int is_add)
1176 vcl_worker_t *wrk = vcl_worker_get_current ();
1180 if (vls_mt_wrk_supported ())
1183 s = vcl_session_get (wrk, vls->session_index);
1184 switch (s->session_state)
1186 case VCL_STATE_LISTEN:
1189 vls_listener_wrk_set (vls, vls->worker_index, 1 /* is_active */ );
1192 vls_listener_wrk_stop_listen (vls, vls->worker_index);
1194 case VCL_STATE_LISTEN_NO_MQ:
1198 /* Register worker as listener */
1199 vls_listener_wrk_start_listen (vls, wrk->wrk_index);
1201 /* If owner worker did not attempt to accept/xpoll on the session,
1202 * force a listen stop for it, since it may not be interested in
1203 * accepting new sessions.
1204 * This is pretty much a hack done to give app workers the illusion
1205 * that it is fine to listen and not accept new sessions for a
1206 * given listener. Without it, we would accumulate unhandled
1207 * accepts on the passive worker message queue. */
1208 owner_wrk = vls_shared_get_owner (vls);
1209 if (!vls_listener_wrk_is_active (vls, owner_wrk))
1210 vls_listener_wrk_stop_listen (vls, owner_wrk);
1218 vls_accept (vls_handle_t listener_vlsh, vppcom_endpt_t * ep, int flags)
1220 vls_handle_t accepted_vlsh;
1221 vcl_locked_session_t *vls;
1225 if (!(vls = vls_get_w_dlock (listener_vlsh)))
1226 return VPPCOM_EBADFD;
1227 if (vcl_n_workers () > 1)
1228 vls_mp_checks (vls, 1 /* is_add */ );
1229 vls_mt_guard (vls, VLS_MT_OP_SPOOL);
1230 sh = vppcom_session_accept (vls_to_sh_tu (vls), ep, flags);
1232 vls_get_and_unlock (listener_vlsh);
1235 accepted_vlsh = vls_alloc (sh);
1236 if (PREDICT_FALSE (accepted_vlsh == VLS_INVALID_HANDLE))
1237 vppcom_session_close (sh);
1238 return accepted_vlsh;
1242 vls_create (uint8_t proto, uint8_t is_nonblocking)
1244 vcl_session_handle_t sh;
1246 vcl_locked_session_t *vls = NULL;
1249 vls_mt_guard (vls, VLS_MT_OP_SPOOL);
1250 sh = vppcom_session_create (proto, is_nonblocking);
1252 if (sh == INVALID_SESSION_ID)
1253 return VLS_INVALID_HANDLE;
1255 vlsh = vls_alloc (sh);
1256 if (PREDICT_FALSE (vlsh == VLS_INVALID_HANDLE))
1257 vppcom_session_close (sh);
1263 vls_mt_session_cleanup (vcl_locked_session_t * vls)
1265 u32 session_index, wrk_index, current_vcl_wrk;
1266 vcl_worker_t *wrk = vcl_worker_get_current ();
1268 ASSERT (vls_mt_wrk_supported ());
1270 current_vcl_wrk = vcl_get_worker_index ();
1273 hash_foreach (wrk_index, session_index, vls->vcl_wrk_index_to_session_index,
1275 if (current_vcl_wrk != wrk_index)
1276 vls_send_session_cleanup_rpc (wrk, wrk_index, session_index);
1279 hash_free (vls->vcl_wrk_index_to_session_index);
1283 vls_close (vls_handle_t vlsh)
1285 vcl_locked_session_t *vls;
1289 vls_mt_table_wlock ();
1291 vls = vls_get_and_lock (vlsh);
1294 vls_mt_table_wunlock ();
1295 return VPPCOM_EBADFD;
1298 vls_mt_guard (vls, VLS_MT_OP_SPOOL);
1300 if (vls_is_shared (vls))
1301 rv = vls_unshare_session (vls, vcl_worker_get_current ());
1303 rv = vppcom_session_close (vls_to_sh (vls));
1305 if (vls_mt_wrk_supported ())
1306 vls_mt_session_cleanup (vls);
1311 vls_mt_table_wunlock ();
1317 vls_epoll_create (void)
1319 vcl_session_handle_t sh;
1324 sh = vppcom_epoll_create ();
1325 if (sh == INVALID_SESSION_ID)
1326 return VLS_INVALID_HANDLE;
1328 vlsh = vls_alloc (sh);
1329 if (vlsh == VLS_INVALID_HANDLE)
1330 vppcom_session_close (sh);
1336 vls_epoll_ctl_mp_checks (vcl_locked_session_t * vls, int op)
1338 if (vcl_n_workers () <= 1 || op == EPOLL_CTL_MOD)
1341 vls_mp_checks (vls, op == EPOLL_CTL_ADD);
1345 vls_epoll_ctl (vls_handle_t ep_vlsh, int op, vls_handle_t vlsh,
1346 struct epoll_event *event)
1348 vcl_locked_session_t *ep_vls, *vls;
1349 vcl_session_handle_t ep_sh, sh;
1353 vls_mt_table_rlock ();
1354 ep_vls = vls_get_and_lock (ep_vlsh);
1356 if (vls_mt_session_should_migrate (ep_vls))
1358 ep_vls = vls_mt_session_migrate (ep_vls);
1359 if (PREDICT_FALSE (!ep_vls))
1360 return VPPCOM_EBADFD;
1363 ep_sh = vls_to_sh (ep_vls);
1364 vls = vls_get_and_lock (vlsh);
1365 sh = vls_to_sh (vls);
1367 vls_epoll_ctl_mp_checks (vls, op);
1368 vls_mt_table_runlock ();
1369 rv = vppcom_epoll_ctl (ep_sh, op, sh, event);
1371 vls_mt_table_rlock ();
1372 ep_vls = vls_get (ep_vlsh);
1373 vls = vls_get (vlsh);
1375 vls_unlock (ep_vls);
1376 vls_mt_table_runlock ();
1381 vls_epoll_wait (vls_handle_t ep_vlsh, struct epoll_event *events,
1382 int maxevents, double wait_for_time)
1384 vcl_locked_session_t *vls, *vls_tmp = NULL;
1388 if (!(vls = vls_get_w_dlock (ep_vlsh)))
1389 return VPPCOM_EBADFD;
1390 vls_mt_guard (vls_tmp, VLS_MT_OP_XPOLL);
1391 rv = vppcom_epoll_wait (vls_to_sh_tu (vls), events, maxevents,
1394 vls_get_and_unlock (ep_vlsh);
1399 vls_select_mp_checks (vcl_si_set * read_map)
1401 vcl_locked_session_t *vls;
1406 if (vcl_n_workers () <= 1)
1408 vlsl->select_mp_check = 1;
1415 vlsl->select_mp_check = 1;
1416 wrk = vcl_worker_get_current ();
1419 clib_bitmap_foreach (si, read_map) {
1420 s = vcl_session_get (wrk, si);
1421 if (s->session_state == VCL_STATE_LISTEN)
1423 vls = vls_get (vls_session_index_to_vlsh (si));
1424 vls_mp_checks (vls, 1 /* is_add */);
1431 vls_select (int n_bits, vcl_si_set * read_map, vcl_si_set * write_map,
1432 vcl_si_set * except_map, double wait_for_time)
1435 vcl_locked_session_t *vls = NULL;
1438 vls_mt_guard (vls, VLS_MT_OP_XPOLL);
1439 if (PREDICT_FALSE (!vlsl->select_mp_check))
1440 vls_select_mp_checks (read_map);
1441 rv = vppcom_select (n_bits, read_map, write_map, except_map, wait_for_time);
1447 vls_unshare_vcl_worker_sessions (vcl_worker_t * wrk)
1449 u32 current_wrk, is_current;
1450 vcl_locked_session_t *vls;
1453 if (pool_elts (vcm->workers) <= 1)
1456 current_wrk = vcl_get_worker_index ();
1457 is_current = current_wrk == wrk->wrk_index;
1460 pool_foreach (s, wrk->sessions) {
1461 vls = vls_get (vls_si_wi_to_vlsh (s->session_index, wrk->wrk_index));
1462 if (vls && (is_current || vls_is_shared_by_wrk (vls, current_wrk)))
1463 vls_unshare_session (vls, wrk);
1469 vls_cleanup_vcl_worker (vcl_worker_t * wrk)
1471 vls_worker_t *vls_wrk = vls_worker_get (wrk->wrk_index);
1473 /* Unshare sessions and also cleanup worker since child may have
1474 * called _exit () and therefore vcl may not catch the event */
1475 vls_unshare_vcl_worker_sessions (wrk);
1476 vcl_worker_cleanup (wrk, 1 /* notify vpp */ );
1478 vls_worker_free (vls_wrk);
1482 vls_cleanup_forked_child (vcl_worker_t * wrk, vcl_worker_t * child_wrk)
1484 vcl_worker_t *sub_child;
1487 if (child_wrk->forked_child != ~0)
1489 sub_child = vcl_worker_get_if_valid (child_wrk->forked_child);
1492 /* Wait a bit, maybe the process is going away */
1493 while (kill (sub_child->current_pid, 0) >= 0 && tries++ < 50)
1495 if (kill (sub_child->current_pid, 0) < 0)
1496 vls_cleanup_forked_child (child_wrk, sub_child);
1499 vls_cleanup_vcl_worker (child_wrk);
1500 VDBG (0, "Cleaned up forked child wrk %u", child_wrk->wrk_index);
1501 wrk->forked_child = ~0;
1504 static struct sigaction old_sa;
1507 vls_intercept_sigchld_handler (int signum, siginfo_t * si, void *uc)
1509 vcl_worker_t *wrk, *child_wrk;
1511 if (vcl_get_worker_index () == ~0)
1514 if (sigaction (SIGCHLD, &old_sa, 0))
1516 VERR ("couldn't restore sigchld");
1520 wrk = vcl_worker_get_current ();
1521 if (wrk->forked_child == ~0)
1524 child_wrk = vcl_worker_get_if_valid (wrk->forked_child);
1528 if (si && si->si_pid != child_wrk->current_pid)
1530 VDBG (0, "unexpected child pid %u", si->si_pid);
1533 vls_cleanup_forked_child (wrk, child_wrk);
1536 if (old_sa.sa_flags & SA_SIGINFO)
1538 void (*fn) (int, siginfo_t *, void *) = old_sa.sa_sigaction;
1539 fn (signum, si, uc);
1543 void (*fn) (int) = old_sa.sa_handler;
1550 vls_incercept_sigchld ()
1552 struct sigaction sa;
1553 if (old_sa.sa_sigaction)
1555 VDBG (0, "have intercepted sigchld");
1558 clib_memset (&sa, 0, sizeof (sa));
1559 sa.sa_sigaction = vls_intercept_sigchld_handler;
1560 sa.sa_flags = SA_SIGINFO;
1561 if (sigaction (SIGCHLD, &sa, &old_sa))
1563 VERR ("couldn't intercept sigchld");
1569 vls_app_pre_fork (void)
1571 vls_incercept_sigchld ();
1572 vcl_flush_mq_events ();
1576 vls_app_fork_child_handler (void)
1578 vcl_worker_t *parent_wrk;
1579 int parent_wrk_index;
1581 parent_wrk_index = vcl_get_worker_index ();
1582 VDBG (0, "initializing forked child %u with parent wrk %u", getpid (),
1588 vcl_set_worker_index (~0);
1591 * Allocate and register vcl worker with vpp
1593 if (vppcom_worker_register ())
1595 VERR ("couldn't register new worker!");
1600 * Allocate/initialize vls worker and share sessions
1602 vls_worker_alloc ();
1603 parent_wrk = vcl_worker_get (parent_wrk_index);
1604 vls_worker_copy_on_fork (parent_wrk);
1605 parent_wrk->forked_child = vcl_get_worker_index ();
1607 /* Reset number of threads and set wrk index */
1608 vlsl->vls_mt_n_threads = 0;
1609 vlsl->vls_wrk_index = vcl_get_worker_index ();
1610 vlsl->select_mp_check = 0;
1611 vls_mt_locks_init ();
1613 VDBG (0, "forked child main worker initialized");
1618 vls_app_fork_parent_handler (void)
1621 while (vcm->forking)
1628 vls_worker_t *wrk = vls_worker_get_current ();
1630 /* Unshare the sessions. VCL will clean up the worker */
1631 vls_unshare_vcl_worker_sessions (vcl_worker_get_current ());
1632 vls_worker_free (wrk);
1636 vls_clone_and_share_rpc_handler (void *args)
1638 vls_clone_and_share_msg_t *msg = (vls_clone_and_share_msg_t *) args;
1639 vls_worker_t *wrk = vls_worker_get_current (), *dst_wrk;
1640 vcl_locked_session_t *vls, *dst_vls;
1641 vcl_worker_t *vcl_wrk = vcl_worker_get_current (), *dst_vcl_wrk;
1642 vcl_session_t *s, *dst_s;
1644 VDBG (1, "process session clone of worker (session): %u (%u) -> %u (%u)",
1645 vcl_wrk->wrk_index, msg->session_index, msg->origin_vcl_wrk,
1646 msg->origin_session_index);
1648 /* VCL locked session can't been protected, so DONT touch it.
1649 * VCL session may been free, check it.
1651 dst_vcl_wrk = vcl_worker_get (msg->origin_vcl_wrk);
1652 s = vcl_session_get (vcl_wrk, msg->session_index);
1653 if (PREDICT_FALSE (!s))
1655 dst_vcl_wrk->rpc_done = VLS_RPC_STATE_SESSION_NOT_EXIST;
1659 if (!vls_mt_wrk_supported ())
1661 vls = vls_session_get (wrk, msg->vls_index);
1662 vls_init_share_session (wrk, vls);
1663 dst_wrk = vls_worker_get (msg->origin_vls_wrk);
1664 dst_vls = vls_session_get (dst_wrk, msg->origin_vls_index);
1665 dst_vls->shared_data_index = vls->shared_data_index;
1667 dst_s = vcl_session_get (dst_vcl_wrk, msg->origin_session_index);
1668 clib_memcpy (dst_s, s, sizeof (*s));
1670 dst_vcl_wrk->rpc_done = VLS_RPC_STATE_SUCCESS;
1674 vls_session_cleanup_rpc_handler (void *args)
1676 vls_sess_cleanup_msg_t *msg = (vls_sess_cleanup_msg_t *) args;
1677 vcl_worker_t *wrk = vcl_worker_get_current ();
1678 vls_worker_t *vls_wrk = vls_worker_get_current ();
1679 vcl_session_handle_t sh = vcl_session_handle_from_index (msg->session_index);
1681 VDBG (1, "process session cleanup of worker (session): %u (%u) from %u ()",
1682 wrk->wrk_index, msg->session_index, msg->origin_vcl_wrk);
1684 vppcom_session_close (sh);
1685 vls_sh_to_vlsh_table_del (vls_wrk, sh);
1689 vls_rpc_handler (void *args)
1691 vls_rpc_msg_t *msg = (vls_rpc_msg_t *) args;
1694 case VLS_RPC_CLONE_AND_SHARE:
1695 vls_clone_and_share_rpc_handler (msg->data);
1697 case VLS_RPC_SESS_CLEANUP:
1698 vls_session_cleanup_rpc_handler (msg->data);
1706 vls_send_clone_and_share_rpc (vcl_worker_t *wrk, u32 origin_vls_index,
1707 u32 session_index, u32 vls_wrk_index,
1708 u32 dst_wrk_index, u32 dst_vls_index,
1709 u32 dst_session_index)
1711 u8 data[sizeof (u8) + sizeof (vls_clone_and_share_msg_t)];
1712 vls_clone_and_share_msg_t *msg;
1715 f64 timeout = clib_time_now (&wrk->clib_time) + VLS_WORKER_RPC_TIMEOUT;
1717 rpc = (vls_rpc_msg_t *) & data;
1718 rpc->type = VLS_RPC_CLONE_AND_SHARE;
1719 msg = (vls_clone_and_share_msg_t *) & rpc->data;
1720 msg->origin_vls_wrk = vls_wrk_index;
1721 msg->origin_vls_index = origin_vls_index;
1722 msg->origin_vcl_wrk = wrk->wrk_index;
1723 msg->origin_session_index = session_index;
1724 msg->vls_index = dst_vls_index;
1725 msg->session_index = dst_session_index;
1727 /* Try lock and handle rpcs if two threads send each other
1728 * clone requests at the same time.
1730 wrk->rpc_done = VLS_RPC_STATE_INIT;
1731 while (!clib_spinlock_trylock (&vlsm->worker_rpc_lock))
1732 vcl_flush_mq_events ();
1733 ret = vcl_send_worker_rpc (dst_wrk_index, rpc, sizeof (data));
1735 VDBG (1, "send session clone to wrk (session): %u (%u) -> %u (%u), ret=%d",
1736 dst_wrk_index, msg->session_index, msg->origin_vcl_wrk,
1737 msg->origin_session_index, ret);
1738 while (!ret && wrk->rpc_done == VLS_RPC_STATE_INIT &&
1739 clib_time_now (&wrk->clib_time) < timeout)
1741 clib_spinlock_unlock (&vlsm->worker_rpc_lock);
1745 vls_send_session_cleanup_rpc (vcl_worker_t * wrk,
1746 u32 dst_wrk_index, u32 dst_session_index)
1748 u8 data[sizeof (u8) + sizeof (vls_sess_cleanup_msg_t)];
1749 vls_sess_cleanup_msg_t *msg;
1753 rpc = (vls_rpc_msg_t *) & data;
1754 rpc->type = VLS_RPC_SESS_CLEANUP;
1755 msg = (vls_sess_cleanup_msg_t *) & rpc->data;
1756 msg->origin_vcl_wrk = wrk->wrk_index;
1757 msg->session_index = dst_session_index;
1759 ret = vcl_send_worker_rpc (dst_wrk_index, rpc, sizeof (data));
1761 VDBG (1, "send session cleanup to wrk (session): %u (%u) from %u, ret=%d",
1762 dst_wrk_index, msg->session_index, msg->origin_vcl_wrk, ret);
1766 vls_app_create (char *app_name)
1770 if ((rv = vppcom_app_create (app_name)))
1773 vlsm = clib_mem_alloc (sizeof (vls_main_t));
1774 clib_memset (vlsm, 0, sizeof (*vlsm));
1775 clib_rwlock_init (&vlsm->vls_table_lock);
1776 clib_rwlock_init (&vlsm->shared_data_lock);
1777 clib_spinlock_init (&vlsm->worker_rpc_lock);
1778 pool_alloc (vlsm->workers, vcm->cfg.max_workers);
1780 pthread_atfork (vls_app_pre_fork, vls_app_fork_parent_handler,
1781 vls_app_fork_child_handler);
1782 atexit (vls_app_exit);
1783 vls_worker_alloc ();
1784 vlsl->vls_wrk_index = vcl_get_worker_index ();
1785 vls_mt_locks_init ();
1786 vcm->wrk_rpc_fn = vls_rpc_handler;
1791 vls_use_eventfd (void)
1793 return vcm->cfg.use_mq_eventfd;
1797 vls_mt_wrk_supported (void)
1799 return vcm->cfg.mt_wrk_supported;
1803 vls_use_real_epoll (void)
1805 if (vcl_get_worker_index () == ~0)
1808 return vcl_worker_get_current ()->vcl_needs_real_epoll;
1812 vls_register_vcl_worker (void)
1818 * fd.io coding-style-patch-verification: ON
1821 * eval: (c-set-style "gnu")