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 vcl_locked_session_
25 u32 *workers_subscribed;
26 clib_bitmap_t *listeners;
27 } vcl_locked_session_t;
29 typedef struct vls_local_
32 volatile int vls_mt_n_threads;
33 pthread_mutex_t vls_mt_mq_mlock;
34 pthread_mutex_t vls_mt_spool_mlock;
35 volatile u8 select_mp_check;
36 volatile u8 epoll_mp_check;
37 } vls_process_local_t;
39 static vls_process_local_t vls_local;
40 static vls_process_local_t *vlsl = &vls_local;
42 typedef struct vls_main_
44 vcl_locked_session_t *vls_pool;
45 clib_rwlock_t vls_table_lock;
46 uword *session_index_to_vlsh_table;
52 vls_table_rlock (void)
54 clib_rwlock_reader_lock (&vlsm->vls_table_lock);
58 vls_table_runlock (void)
60 clib_rwlock_reader_unlock (&vlsm->vls_table_lock);
64 vls_table_wlock (void)
66 clib_rwlock_writer_lock (&vlsm->vls_table_lock);
70 vls_table_wunlock (void)
72 clib_rwlock_writer_unlock (&vlsm->vls_table_lock);
85 VLS_MT_LOCK_MQ = 1 << 0,
86 VLS_MT_LOCK_SPOOL = 1 << 1
92 vlsl->vls_mt_n_threads += 1;
93 vcl_set_worker_index (vlsl->vls_wrk_index);
99 pthread_mutex_lock (&vlsl->vls_mt_mq_mlock);
103 vls_mt_mq_unlock (void)
105 pthread_mutex_unlock (&vlsl->vls_mt_mq_mlock);
109 vls_mt_spool_lock (void)
111 pthread_mutex_lock (&vlsl->vls_mt_spool_mlock);
115 vls_mt_create_unlock (void)
117 pthread_mutex_unlock (&vlsl->vls_mt_spool_mlock);
121 vls_mt_locks_init (void)
123 pthread_mutex_init (&vlsl->vls_mt_mq_mlock, NULL);
124 pthread_mutex_init (&vlsl->vls_mt_spool_mlock, NULL);
127 static inline vcl_session_handle_t
128 vls_to_sh (vcl_locked_session_t * vls)
130 return vcl_session_handle_from_index (vls->session_index);
133 static inline vcl_session_handle_t
134 vls_to_sh_tu (vcl_locked_session_t * vls)
136 vcl_session_handle_t sh;
137 sh = vls_to_sh (vls);
138 vls_table_runlock ();
143 vls_alloc (vcl_session_handle_t sh)
145 vcl_locked_session_t *vls;
148 pool_get (vlsm->vls_pool, vls);
149 vls->session_index = vppcom_session_index (sh);
150 vls->worker_index = vppcom_session_worker (sh);
151 vls->vls_index = vls - vlsm->vls_pool;
152 hash_set (vlsm->session_index_to_vlsh_table, vls->session_index,
154 clib_spinlock_init (&vls->lock);
155 vls_table_wunlock ();
156 return vls->vls_index;
159 static vcl_locked_session_t *
160 vls_get (vls_handle_t vlsh)
162 if (pool_is_free_index (vlsm->vls_pool, vlsh))
164 return pool_elt_at_index (vlsm->vls_pool, vlsh);
168 vls_free (vcl_locked_session_t * vls)
171 hash_unset (vlsm->session_index_to_vlsh_table, vls->session_index);
172 clib_spinlock_free (&vls->lock);
173 pool_put (vlsm->vls_pool, vls);
176 static vcl_locked_session_t *
177 vls_get_and_lock (vls_handle_t vlsh)
179 vcl_locked_session_t *vls;
180 if (pool_is_free_index (vlsm->vls_pool, vlsh))
182 vls = pool_elt_at_index (vlsm->vls_pool, vlsh);
183 clib_spinlock_lock (&vls->lock);
187 static vcl_locked_session_t *
188 vls_get_w_dlock (vls_handle_t vlsh)
190 vcl_locked_session_t *vls;
192 vls = vls_get_and_lock (vlsh);
194 vls_table_runlock ();
199 vls_lock (vcl_locked_session_t * vls)
201 clib_spinlock_lock (&vls->lock);
205 vls_unlock (vcl_locked_session_t * vls)
207 clib_spinlock_unlock (&vls->lock);
211 vls_get_and_unlock (vls_handle_t vlsh)
213 vcl_locked_session_t *vls;
215 vls = vls_get (vlsh);
217 vls_table_runlock ();
221 vls_dunlock (vcl_locked_session_t * vls)
224 vls_table_runlock ();
228 vlsh_to_sh (vls_handle_t vlsh)
230 vcl_locked_session_t *vls;
233 vls = vls_get_w_dlock (vlsh);
235 return INVALID_SESSION_ID;
236 rv = vls_to_sh (vls);
242 vlsh_to_session_index (vls_handle_t vlsh)
244 vcl_session_handle_t sh;
245 sh = vlsh_to_sh (vlsh);
246 return vppcom_session_index (sh);
250 vls_si_to_vlsh (u32 session_index)
253 vlshp = hash_get (vlsm->session_index_to_vlsh_table, session_index);
254 return vlshp ? *vlshp : VLS_INVALID_HANDLE;
258 vls_session_index_to_vlsh (uint32_t session_index)
263 vlsh = vls_si_to_vlsh (session_index);
264 vls_table_runlock ();
270 vls_is_shared (vcl_locked_session_t * vls)
272 return vec_len (vls->workers_subscribed);
276 vls_is_shared_by_wrk (vcl_locked_session_t * vls, u32 wrk_index)
279 for (i = 0; i < vec_len (vls->workers_subscribed); i++)
280 if (vls->workers_subscribed[i] == wrk_index)
286 vls_listener_wrk_set (vcl_locked_session_t * vls, u32 wrk_index, u8 is_active)
288 clib_bitmap_set (vls->listeners, wrk_index, is_active);
292 vls_listener_wrk_is_active (vcl_locked_session_t * vls, u32 wrk_index)
294 return (clib_bitmap_get (vls->listeners, wrk_index) == 1);
298 vls_listener_wrk_start_listen (vcl_locked_session_t * vls, u32 wrk_index)
300 vppcom_session_listen (vls_to_sh (vls), ~0);
301 vls_listener_wrk_set (vls, wrk_index, 1 /* is_active */ );
305 vls_listener_wrk_stop_listen (vcl_locked_session_t * vls, u32 wrk_index)
310 wrk = vcl_worker_get (wrk_index);
311 s = vcl_session_get (wrk, vls->session_index);
312 if (s->session_state != STATE_LISTEN)
314 vppcom_send_unbind_sock (wrk, s->vpp_handle);
315 s->session_state = STATE_LISTEN_NO_MQ;
316 vls_listener_wrk_set (vls, wrk_index, 0 /* is_active */ );
320 vls_unshare_session (vcl_locked_session_t * vls, vcl_worker_t * wrk)
322 int i, do_disconnect;
325 s = vcl_session_get (wrk, vls->session_index);
326 if (s->session_state == STATE_LISTEN)
327 vls_listener_wrk_set (vls, wrk->wrk_index, 0 /* is_active */ );
329 for (i = 0; i < vec_len (vls->workers_subscribed); i++)
331 if (vls->workers_subscribed[i] != wrk->wrk_index)
336 svm_fifo_del_subscriber (s->rx_fifo, wrk->vpp_wrk_index);
337 svm_fifo_del_subscriber (s->tx_fifo, wrk->vpp_wrk_index);
339 vec_del1 (vls->workers_subscribed, i);
340 do_disconnect = s->session_state == STATE_LISTEN;
341 vcl_session_cleanup (wrk, s, vcl_session_handle (s), do_disconnect);
345 /* Return, if this is not the owning worker */
346 if (vls->worker_index != wrk->wrk_index)
349 /* Check if we can change owner or close */
350 if (vec_len (vls->workers_subscribed))
352 vls->worker_index = vls->workers_subscribed[0];
353 vec_del1 (vls->workers_subscribed, 0);
354 vcl_send_session_worker_update (wrk, s, vls->worker_index);
355 if (vec_len (vls->workers_subscribed))
356 clib_warning ("more workers need to be updated");
360 vcl_session_cleanup (wrk, s, vcl_session_handle (s),
361 1 /* do_disconnect */ );
368 vls_share_vcl_session (vcl_worker_t * wrk, vcl_session_t * s)
370 vcl_locked_session_t *vls;
372 vls = vls_get (vls_si_to_vlsh (s->session_index));
376 vec_add1 (vls->workers_subscribed, wrk->wrk_index);
379 svm_fifo_add_subscriber (s->rx_fifo, wrk->vpp_wrk_index);
380 svm_fifo_add_subscriber (s->tx_fifo, wrk->vpp_wrk_index);
382 else if (s->session_state == STATE_LISTEN)
384 s->session_state = STATE_LISTEN_NO_MQ;
391 vls_worker_copy_on_fork (vcl_worker_t * parent_wrk)
393 vcl_worker_t *wrk = vcl_worker_get_current ();
396 wrk->vpp_event_queues = vec_dup (parent_wrk->vpp_event_queues);
397 wrk->sessions = pool_dup (parent_wrk->sessions);
398 wrk->session_index_by_vpp_handles =
399 hash_dup (parent_wrk->session_index_by_vpp_handles);
403 pool_foreach (s, wrk->sessions, ({
404 vls_share_vcl_session (wrk, s);
408 vls_table_wunlock ();
412 vls_mt_acq_locks (vcl_locked_session_t * vls, vls_mt_ops_t op, int *locks_acq)
414 vcl_worker_t *wrk = vcl_worker_get_current ();
415 vcl_session_t *s = 0;
420 s = vcl_session_get (wrk, vls->session_index);
421 if (PREDICT_FALSE (!s))
423 is_nonblk = VCL_SESS_ATTR_TEST (s->attr, VCL_SESS_ATTR_NONBLOCK);
430 is_nonblk = vcl_session_read_ready (s) != 0;
434 *locks_acq |= VLS_MT_LOCK_MQ;
437 case VLS_MT_OP_WRITE:
439 is_nonblk = vcl_session_write_ready (s) != 0;
443 *locks_acq |= VLS_MT_LOCK_MQ;
446 case VLS_MT_OP_XPOLL:
448 *locks_acq |= VLS_MT_LOCK_MQ;
450 case VLS_MT_OP_SPOOL:
451 vls_mt_spool_lock ();
452 *locks_acq |= VLS_MT_LOCK_SPOOL;
460 vls_mt_rel_locks (int locks_acq)
462 if (locks_acq & VLS_MT_LOCK_MQ)
464 if (locks_acq & VLS_MT_LOCK_SPOOL)
465 vls_mt_create_unlock ();
468 #define vls_mt_guard(_vls, _op) \
469 int _locks_acq = 0; \
470 if (PREDICT_FALSE (vcl_get_worker_index () == ~0)); \
472 if (PREDICT_FALSE (vlsl->vls_mt_n_threads > 1)) \
473 vls_mt_acq_locks (_vls, _op, &_locks_acq); \
475 #define vls_mt_unguard() \
476 if (PREDICT_FALSE (_locks_acq)) \
477 vls_mt_rel_locks (_locks_acq)
480 vls_write (vls_handle_t vlsh, void *buf, size_t nbytes)
482 vcl_locked_session_t *vls;
485 if (!(vls = vls_get_w_dlock (vlsh)))
486 return VPPCOM_EBADFD;
488 vls_mt_guard (vls, VLS_MT_OP_WRITE);
489 rv = vppcom_session_write (vls_to_sh_tu (vls), buf, nbytes);
491 vls_get_and_unlock (vlsh);
496 vls_write_msg (vls_handle_t vlsh, void *buf, size_t nbytes)
498 vcl_locked_session_t *vls;
501 if (!(vls = vls_get_w_dlock (vlsh)))
502 return VPPCOM_EBADFD;
503 vls_mt_guard (vls, VLS_MT_OP_WRITE);
504 rv = vppcom_session_write_msg (vls_to_sh_tu (vls), buf, nbytes);
506 vls_get_and_unlock (vlsh);
511 vls_sendto (vls_handle_t vlsh, void *buf, int buflen, int flags,
514 vcl_locked_session_t *vls;
517 if (!(vls = vls_get_w_dlock (vlsh)))
518 return VPPCOM_EBADFD;
519 vls_mt_guard (vls, VLS_MT_OP_WRITE);
520 rv = vppcom_session_sendto (vls_to_sh_tu (vls), buf, buflen, flags, ep);
522 vls_get_and_unlock (vlsh);
527 vls_read (vls_handle_t vlsh, void *buf, size_t nbytes)
529 vcl_locked_session_t *vls;
532 if (!(vls = vls_get_w_dlock (vlsh)))
533 return VPPCOM_EBADFD;
534 vls_mt_guard (vls, VLS_MT_OP_READ);
535 rv = vppcom_session_read (vls_to_sh_tu (vls), buf, nbytes);
537 vls_get_and_unlock (vlsh);
542 vls_recvfrom (vls_handle_t vlsh, void *buffer, uint32_t buflen, int flags,
545 vcl_locked_session_t *vls;
548 if (!(vls = vls_get_w_dlock (vlsh)))
549 return VPPCOM_EBADFD;
550 vls_mt_guard (vls, VLS_MT_OP_READ);
551 rv = vppcom_session_recvfrom (vls_to_sh_tu (vls), buffer, buflen, flags,
554 vls_get_and_unlock (vlsh);
559 vls_attr (vls_handle_t vlsh, uint32_t op, void *buffer, uint32_t * buflen)
561 vcl_locked_session_t *vls;
564 if (!(vls = vls_get_w_dlock (vlsh)))
565 return VPPCOM_EBADFD;
566 rv = vppcom_session_attr (vls_to_sh_tu (vls), op, buffer, buflen);
567 vls_get_and_unlock (vlsh);
572 vls_bind (vls_handle_t vlsh, vppcom_endpt_t * ep)
574 vcl_locked_session_t *vls;
577 if (!(vls = vls_get_w_dlock (vlsh)))
578 return VPPCOM_EBADFD;
579 rv = vppcom_session_bind (vls_to_sh_tu (vls), ep);
580 vls_get_and_unlock (vlsh);
585 vls_listen (vls_handle_t vlsh, int q_len)
587 vcl_locked_session_t *vls;
590 if (!(vls = vls_get_w_dlock (vlsh)))
591 return VPPCOM_EBADFD;
592 vls_mt_guard (vls, VLS_MT_OP_XPOLL);
593 rv = vppcom_session_listen (vls_to_sh_tu (vls), q_len);
595 vls_get_and_unlock (vlsh);
600 vls_connect (vls_handle_t vlsh, vppcom_endpt_t * server_ep)
602 vcl_locked_session_t *vls;
605 if (!(vls = vls_get_w_dlock (vlsh)))
606 return VPPCOM_EBADFD;
607 vls_mt_guard (vls, VLS_MT_OP_XPOLL);
608 rv = vppcom_session_connect (vls_to_sh_tu (vls), server_ep);
610 vls_get_and_unlock (vlsh);
615 vls_mp_checks (vcl_locked_session_t * vls, int is_add)
617 vcl_worker_t *wrk = vcl_worker_get_current ();
620 s = vcl_session_get (wrk, vls->session_index);
621 switch (s->session_state)
626 if (vls->worker_index == wrk->wrk_index)
627 vls_listener_wrk_set (vls, wrk->wrk_index, 1 /* is_active */ );
630 vls_listener_wrk_stop_listen (vls, vls->worker_index);
632 case STATE_LISTEN_NO_MQ:
636 /* Register worker as listener */
637 vls_listener_wrk_start_listen (vls, wrk->wrk_index);
639 /* If owner worker did not attempt to accept/xpoll on the session,
640 * force a listen stop for it, since it may not be interested in
641 * accepting new sessions.
642 * This is pretty much a hack done to give app workers the illusion
643 * that it is fine to listen and not accept new sessions for a
644 * given listener. Without it, we would accumulate unhandled
645 * accepts on the passive worker message queue. */
646 if (!vls_listener_wrk_is_active (vls, vls->worker_index))
647 vls_listener_wrk_stop_listen (vls, vls->worker_index);
655 vls_accept (vls_handle_t listener_vlsh, vppcom_endpt_t * ep, int flags)
657 vls_handle_t accepted_vlsh;
658 vcl_locked_session_t *vls;
661 if (!(vls = vls_get_w_dlock (listener_vlsh)))
662 return VPPCOM_EBADFD;
663 if (vcl_n_workers () > 1)
664 vls_mp_checks (vls, 1 /* is_add */ );
665 vls_mt_guard (vls, VLS_MT_OP_SPOOL);
666 sh = vppcom_session_accept (vls_to_sh_tu (vls), ep, flags);
668 vls_get_and_unlock (listener_vlsh);
671 accepted_vlsh = vls_alloc (sh);
672 if (PREDICT_FALSE (accepted_vlsh == VLS_INVALID_HANDLE))
673 vppcom_session_close (sh);
674 return accepted_vlsh;
678 vls_create (uint8_t proto, uint8_t is_nonblocking)
680 vcl_session_handle_t sh;
683 vls_mt_guard (0, VLS_MT_OP_SPOOL);
684 sh = vppcom_session_create (proto, is_nonblocking);
686 if (sh == INVALID_SESSION_ID)
687 return VLS_INVALID_HANDLE;
689 vlsh = vls_alloc (sh);
690 if (PREDICT_FALSE (vlsh == VLS_INVALID_HANDLE))
691 vppcom_session_close (sh);
697 vls_close (vls_handle_t vlsh)
699 vcl_locked_session_t *vls;
704 vls = vls_get_and_lock (vlsh);
707 vls_table_wunlock ();
708 return VPPCOM_EBADFD;
711 vls_mt_guard (0, VLS_MT_OP_SPOOL);
712 if (vls_is_shared (vls))
714 /* At least two workers share the session so vls won't be freed */
715 vls_unshare_session (vls, vcl_worker_get_current ());
718 vls_table_wunlock ();
722 rv = vppcom_session_close (vls_to_sh (vls));
726 vls_table_wunlock ();
732 vls_epoll_create (void)
734 vcl_session_handle_t sh;
737 sh = vppcom_epoll_create ();
738 if (sh == INVALID_SESSION_ID)
739 return VLS_INVALID_HANDLE;
741 vlsh = vls_alloc (sh);
742 if (vlsh == VLS_INVALID_HANDLE)
743 vppcom_session_close (sh);
749 vls_epoll_ctl_mp_checks (vcl_locked_session_t * vls, int op)
751 if (vcl_n_workers () <= 1)
753 vlsl->epoll_mp_check = 1;
757 if (op == EPOLL_CTL_MOD)
760 vlsl->epoll_mp_check = 1;
761 vls_mp_checks (vls, op == EPOLL_CTL_ADD);
765 vls_epoll_ctl (vls_handle_t ep_vlsh, int op, vls_handle_t vlsh,
766 struct epoll_event *event)
768 vcl_locked_session_t *ep_vls, *vls;
769 vcl_session_handle_t ep_sh, sh;
773 ep_vls = vls_get_and_lock (ep_vlsh);
774 vls = vls_get_and_lock (vlsh);
775 ep_sh = vls_to_sh (ep_vls);
776 sh = vls_to_sh (vls);
778 if (PREDICT_FALSE (!vlsl->epoll_mp_check))
779 vls_epoll_ctl_mp_checks (vls, op);
781 vls_table_runlock ();
783 rv = vppcom_epoll_ctl (ep_sh, op, sh, event);
786 ep_vls = vls_get (ep_vlsh);
787 vls = vls_get (vlsh);
790 vls_table_runlock ();
795 vls_epoll_wait (vls_handle_t ep_vlsh, struct epoll_event *events,
796 int maxevents, double wait_for_time)
798 vcl_locked_session_t *vls;
801 if (!(vls = vls_get_w_dlock (ep_vlsh)))
802 return VPPCOM_EBADFD;
803 vls_mt_guard (0, VLS_MT_OP_XPOLL);
804 rv = vppcom_epoll_wait (vls_to_sh_tu (vls), events, maxevents,
807 vls_get_and_unlock (ep_vlsh);
812 vls_select_mp_checks (vcl_si_set * read_map)
814 vcl_locked_session_t *vls;
819 if (vcl_n_workers () <= 1)
821 vlsl->select_mp_check = 1;
828 vlsl->select_mp_check = 1;
829 wrk = vcl_worker_get_current ();
832 clib_bitmap_foreach (si, read_map, ({
833 s = vcl_session_get (wrk, si);
834 if (s->session_state == STATE_LISTEN)
836 vls = vls_get (vls_session_index_to_vlsh (si));
837 vls_mp_checks (vls, 1 /* is_add */);
844 vls_select (int n_bits, vcl_si_set * read_map, vcl_si_set * write_map,
845 vcl_si_set * except_map, double wait_for_time)
849 vls_mt_guard (0, VLS_MT_OP_XPOLL);
850 if (PREDICT_FALSE (!vlsl->select_mp_check))
851 vls_select_mp_checks (read_map);
852 rv = vppcom_select (n_bits, read_map, write_map, except_map, wait_for_time);
858 vls_unshare_vcl_worker_sessions (vcl_worker_t * wrk)
860 u32 current_wrk, is_current;
861 vcl_locked_session_t *vls;
864 current_wrk = vcl_get_worker_index ();
865 is_current = current_wrk == wrk->wrk_index;
869 pool_foreach (s, wrk->sessions, ({
870 vls = vls_get (vls_si_to_vlsh (s->session_index));
871 if (vls && (is_current || vls_is_shared_by_wrk (vls, current_wrk)))
872 vls_unshare_session (vls, wrk);
876 vls_table_wunlock ();
880 vls_cleanup_vcl_worker (vcl_worker_t * wrk)
882 /* Unshare sessions and also cleanup worker since child may have
883 * called _exit () and therefore vcl may not catch the event */
884 vls_unshare_vcl_worker_sessions (wrk);
885 vcl_worker_cleanup (wrk, 1 /* notify vpp */ );
889 vls_cleanup_forked_child (vcl_worker_t * wrk, vcl_worker_t * child_wrk)
891 vcl_worker_t *sub_child;
894 if (child_wrk->forked_child != ~0)
896 sub_child = vcl_worker_get_if_valid (child_wrk->forked_child);
899 /* Wait a bit, maybe the process is going away */
900 while (kill (sub_child->current_pid, 0) >= 0 && tries++ < 50)
902 if (kill (sub_child->current_pid, 0) < 0)
903 vls_cleanup_forked_child (child_wrk, sub_child);
906 vls_cleanup_vcl_worker (child_wrk);
907 VDBG (0, "Cleaned up forked child wrk %u", child_wrk->wrk_index);
908 wrk->forked_child = ~0;
911 static struct sigaction old_sa;
914 vls_intercept_sigchld_handler (int signum, siginfo_t * si, void *uc)
916 vcl_worker_t *wrk, *child_wrk;
918 if (vcl_get_worker_index () == ~0)
921 if (sigaction (SIGCHLD, &old_sa, 0))
923 VERR ("couldn't restore sigchld");
927 wrk = vcl_worker_get_current ();
928 if (wrk->forked_child == ~0)
931 child_wrk = vcl_worker_get_if_valid (wrk->forked_child);
935 if (si && si->si_pid != child_wrk->current_pid)
937 VDBG (0, "unexpected child pid %u", si->si_pid);
940 vls_cleanup_forked_child (wrk, child_wrk);
943 if (old_sa.sa_flags & SA_SIGINFO)
945 void (*fn) (int, siginfo_t *, void *) = old_sa.sa_sigaction;
950 void (*fn) (int) = old_sa.sa_handler;
957 vls_incercept_sigchld ()
960 clib_memset (&sa, 0, sizeof (sa));
961 sa.sa_sigaction = vls_intercept_sigchld_handler;
962 sa.sa_flags = SA_SIGINFO;
963 if (sigaction (SIGCHLD, &sa, &old_sa))
965 VERR ("couldn't intercept sigchld");
971 vls_app_pre_fork (void)
973 vls_incercept_sigchld ();
974 vcl_flush_mq_events ();
978 vls_app_fork_child_handler (void)
980 vcl_worker_t *parent_wrk;
981 int rv, parent_wrk_index;
984 parent_wrk_index = vcl_get_worker_index ();
985 VDBG (0, "initializing forked child %u with parent wrk %u", getpid (),
991 vcl_set_worker_index (~0);
992 if (!vcl_worker_alloc_and_init ())
993 VERR ("couldn't allocate new worker");
996 * Attach to binary api
998 child_name = format (0, "%v-child-%u%c", vcm->app_name, getpid (), 0);
1000 vppcom_api_hookup ();
1001 vcm->app_state = STATE_APP_START;
1002 rv = vppcom_connect_to_vpp ((char *) child_name);
1003 vec_free (child_name);
1006 VERR ("couldn't connect to VPP!");
1011 * Register worker with vpp and share sessions
1013 vcl_worker_register_with_vpp ();
1014 parent_wrk = vcl_worker_get (parent_wrk_index);
1015 vls_worker_copy_on_fork (parent_wrk);
1016 parent_wrk->forked_child = vcl_get_worker_index ();
1018 /* Reset number of threads and set wrk index */
1019 vlsl->vls_mt_n_threads = 0;
1020 vlsl->vls_wrk_index = vcl_get_worker_index ();
1021 vlsl->select_mp_check = 0;
1022 vlsl->epoll_mp_check = 0;
1023 vls_mt_locks_init ();
1025 VDBG (0, "forked child main worker initialized");
1030 vls_app_fork_parent_handler (void)
1033 while (vcm->forking)
1040 /* Unshare the sessions. VCL will clean up the worker */
1041 vls_unshare_vcl_worker_sessions (vcl_worker_get_current ());
1045 vls_app_create (char *app_name)
1049 if ((rv = vppcom_app_create (app_name)))
1051 vlsm = clib_mem_alloc (sizeof (vls_main_t));
1052 clib_memset (vlsm, 0, sizeof (*vlsm));
1053 clib_rwlock_init (&vlsm->vls_table_lock);
1054 pthread_atfork (vls_app_pre_fork, vls_app_fork_parent_handler,
1055 vls_app_fork_child_handler);
1056 atexit (vls_app_exit);
1057 vlsl->vls_wrk_index = vcl_get_worker_index ();
1058 vls_mt_locks_init ();
1063 * fd.io coding-style-patch-verification: ON
1066 * eval: (c-set-style "gnu")