| /* |
| * Copyright (c) 2018 Cisco and/or its affiliates. |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <vcl/vcl_private.h> |
| |
| pthread_key_t vcl_worker_stop_key; |
| |
| static const char * |
| vppcom_app_state_str (app_state_t state) |
| { |
| char *st; |
| |
| switch (state) |
| { |
| case STATE_APP_START: |
| st = "STATE_APP_START"; |
| break; |
| |
| case STATE_APP_CONN_VPP: |
| st = "STATE_APP_CONN_VPP"; |
| break; |
| |
| case STATE_APP_ENABLED: |
| st = "STATE_APP_ENABLED"; |
| break; |
| |
| case STATE_APP_ATTACHED: |
| st = "STATE_APP_ATTACHED"; |
| break; |
| |
| default: |
| st = "UNKNOWN_APP_STATE"; |
| break; |
| } |
| |
| return st; |
| } |
| |
| int |
| vcl_wait_for_app_state_change (app_state_t app_state) |
| { |
| vcl_worker_t *wrk = vcl_worker_get_current (); |
| f64 timeout = clib_time_now (&wrk->clib_time) + vcm->cfg.app_timeout; |
| |
| while (clib_time_now (&wrk->clib_time) < timeout) |
| { |
| if (vcm->app_state == app_state) |
| return VPPCOM_OK; |
| if (vcm->app_state == STATE_APP_FAILED) |
| return VPPCOM_ECONNABORTED; |
| } |
| VDBG (0, "VCL<%d>: timeout waiting for state %s (%d)", getpid (), |
| vppcom_app_state_str (app_state), app_state); |
| vcl_evt (VCL_EVT_SESSION_TIMEOUT, vcm, app_state); |
| |
| return VPPCOM_ETIMEDOUT; |
| } |
| |
| vcl_cut_through_registration_t * |
| vcl_ct_registration_lock_and_alloc (vcl_worker_t * wrk) |
| { |
| vcl_cut_through_registration_t *cr; |
| clib_spinlock_lock (&wrk->ct_registration_lock); |
| pool_get (wrk->cut_through_registrations, cr); |
| memset (cr, 0, sizeof (*cr)); |
| cr->epoll_evt_conn_index = -1; |
| return cr; |
| } |
| |
| u32 |
| vcl_ct_registration_index (vcl_worker_t * wrk, |
| vcl_cut_through_registration_t * ctr) |
| { |
| return (ctr - wrk->cut_through_registrations); |
| } |
| |
| void |
| vcl_ct_registration_lock (vcl_worker_t * wrk) |
| { |
| clib_spinlock_lock (&wrk->ct_registration_lock); |
| } |
| |
| void |
| vcl_ct_registration_unlock (vcl_worker_t * wrk) |
| { |
| clib_spinlock_unlock (&wrk->ct_registration_lock); |
| } |
| |
| vcl_cut_through_registration_t * |
| vcl_ct_registration_get (vcl_worker_t * wrk, u32 ctr_index) |
| { |
| if (pool_is_free_index (wrk->cut_through_registrations, ctr_index)) |
| return 0; |
| return pool_elt_at_index (wrk->cut_through_registrations, ctr_index); |
| } |
| |
| vcl_cut_through_registration_t * |
| vcl_ct_registration_lock_and_lookup (vcl_worker_t * wrk, uword mq_addr) |
| { |
| uword *p; |
| clib_spinlock_lock (&wrk->ct_registration_lock); |
| p = hash_get (wrk->ct_registration_by_mq, mq_addr); |
| if (!p) |
| return 0; |
| return vcl_ct_registration_get (wrk, p[0]); |
| } |
| |
| void |
| vcl_ct_registration_lookup_add (vcl_worker_t * wrk, uword mq_addr, |
| u32 ctr_index) |
| { |
| hash_set (wrk->ct_registration_by_mq, mq_addr, ctr_index); |
| } |
| |
| void |
| vcl_ct_registration_lookup_del (vcl_worker_t * wrk, uword mq_addr) |
| { |
| hash_unset (wrk->ct_registration_by_mq, mq_addr); |
| } |
| |
| void |
| vcl_ct_registration_del (vcl_worker_t * wrk, |
| vcl_cut_through_registration_t * ctr) |
| { |
| pool_put (wrk->cut_through_registrations, ctr); |
| } |
| |
| vcl_mq_evt_conn_t * |
| vcl_mq_evt_conn_alloc (vcl_worker_t * wrk) |
| { |
| vcl_mq_evt_conn_t *mqc; |
| pool_get (wrk->mq_evt_conns, mqc); |
| memset (mqc, 0, sizeof (*mqc)); |
| return mqc; |
| } |
| |
| u32 |
| vcl_mq_evt_conn_index (vcl_worker_t * wrk, vcl_mq_evt_conn_t * mqc) |
| { |
| return (mqc - wrk->mq_evt_conns); |
| } |
| |
| vcl_mq_evt_conn_t * |
| vcl_mq_evt_conn_get (vcl_worker_t * wrk, u32 mq_conn_idx) |
| { |
| return pool_elt_at_index (wrk->mq_evt_conns, mq_conn_idx); |
| } |
| |
| int |
| vcl_mq_epoll_add_evfd (vcl_worker_t * wrk, svm_msg_q_t * mq) |
| { |
| struct epoll_event e = { 0 }; |
| vcl_mq_evt_conn_t *mqc; |
| u32 mqc_index; |
| int mq_fd; |
| |
| mq_fd = svm_msg_q_get_consumer_eventfd (mq); |
| |
| if (wrk->mqs_epfd < 0 || mq_fd == -1) |
| return -1; |
| |
| mqc = vcl_mq_evt_conn_alloc (wrk); |
| mqc_index = vcl_mq_evt_conn_index (wrk, mqc); |
| mqc->mq_fd = mq_fd; |
| mqc->mq = mq; |
| |
| e.events = EPOLLIN; |
| e.data.u32 = mqc_index; |
| if (epoll_ctl (wrk->mqs_epfd, EPOLL_CTL_ADD, mq_fd, &e) < 0) |
| { |
| clib_warning ("failed to add mq eventfd to mq epoll fd"); |
| return -1; |
| } |
| |
| return mqc_index; |
| } |
| |
| int |
| vcl_mq_epoll_del_evfd (vcl_worker_t * wrk, u32 mqc_index) |
| { |
| vcl_mq_evt_conn_t *mqc; |
| |
| if (wrk->mqs_epfd || mqc_index == ~0) |
| return -1; |
| |
| mqc = vcl_mq_evt_conn_get (wrk, mqc_index); |
| if (epoll_ctl (wrk->mqs_epfd, EPOLL_CTL_DEL, mqc->mq_fd, 0) < 0) |
| { |
| clib_warning ("failed to del mq eventfd to mq epoll fd"); |
| return -1; |
| } |
| return 0; |
| } |
| |
| static vcl_worker_t * |
| vcl_worker_alloc (void) |
| { |
| vcl_worker_t *wrk; |
| pool_get (vcm->workers, wrk); |
| memset (wrk, 0, sizeof (*wrk)); |
| wrk->wrk_index = wrk - vcm->workers; |
| return wrk; |
| } |
| |
| static void |
| vcl_worker_free (vcl_worker_t * wrk) |
| { |
| pool_put (vcm->workers, wrk); |
| } |
| |
| static void |
| vcl_worker_cleanup (void *arg) |
| { |
| vcl_worker_t *wrk = vcl_worker_get_current (); |
| VDBG (0, "cleaning up worker %u", wrk->wrk_index); |
| vcl_send_app_worker_add_del (0 /* is_add */ ); |
| close (wrk->mqs_epfd); |
| hash_free (wrk->session_index_by_vpp_handles); |
| hash_free (wrk->ct_registration_by_mq); |
| clib_spinlock_free (&wrk->ct_registration_lock); |
| vec_free (wrk->mq_events); |
| vec_free (wrk->mq_msg_vector); |
| vcl_set_worker_index (~0); |
| vcl_worker_free (wrk); |
| } |
| |
| vcl_worker_t * |
| vcl_worker_alloc_and_init () |
| { |
| vcl_worker_t *wrk; |
| |
| /* This was initialized already */ |
| if (vcl_get_worker_index () != ~0) |
| return 0; |
| |
| if (pool_elts (vcm->workers) == vcm->cfg.max_workers) |
| { |
| VDBG (0, "max-workers %u limit reached", vcm->cfg.max_workers); |
| return 0; |
| } |
| |
| clib_spinlock_lock (&vcm->workers_lock); |
| wrk = vcl_worker_alloc (); |
| vcl_set_worker_index (wrk->wrk_index); |
| |
| wrk->mqs_epfd = -1; |
| if (vcm->cfg.use_mq_eventfd) |
| { |
| wrk->mqs_epfd = epoll_create (1); |
| if (wrk->mqs_epfd < 0) |
| { |
| clib_unix_warning ("epoll_create() returned"); |
| return 0; |
| } |
| } |
| |
| wrk->session_index_by_vpp_handles = hash_create (0, sizeof (uword)); |
| wrk->ct_registration_by_mq = hash_create (0, sizeof (uword)); |
| clib_spinlock_init (&wrk->ct_registration_lock); |
| clib_time_init (&wrk->clib_time); |
| vec_validate (wrk->mq_events, 64); |
| vec_validate (wrk->mq_msg_vector, 128); |
| vec_reset_length (wrk->mq_msg_vector); |
| |
| if (wrk->wrk_index == 0) |
| { |
| clib_spinlock_unlock (&vcm->workers_lock); |
| return wrk; |
| } |
| |
| vcm->app_state = STATE_APP_ADDING_WORKER; |
| vcl_send_app_worker_add_del (1 /* is_add */ ); |
| if (vcl_wait_for_app_state_change (STATE_APP_READY)) |
| { |
| clib_warning ("failed to add worker to vpp"); |
| return 0; |
| } |
| |
| if (pthread_key_create (&vcl_worker_stop_key, vcl_worker_cleanup)) |
| clib_warning ("failed to add pthread cleanup function"); |
| |
| clib_spinlock_unlock (&vcm->workers_lock); |
| |
| VDBG (0, "added worker %u", wrk->wrk_index); |
| |
| return wrk; |
| } |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |