diff options
Diffstat (limited to 'src/vcl')
| -rw-r--r-- | src/vcl/vcl_event.c | 267 | ||||
| -rw-r--r-- | src/vcl/vcl_event.h | 154 | ||||
| -rw-r--r-- | src/vcl/vppcom.c | 432 |
3 files changed, 651 insertions, 202 deletions
diff --git a/src/vcl/vcl_event.c b/src/vcl/vcl_event.c new file mode 100644 index 00000000000..b706a93e56a --- /dev/null +++ b/src/vcl/vcl_event.c @@ -0,0 +1,267 @@ +/* + * Copyright (c) 2019 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 <vppinfra/fifo.h> +#include <vppinfra/pool.h> +#include <vppinfra/hash.h> +#include <vnet/api_errno.h> + +#include <vcl/vcl_event.h> +/** + * @file + * @brief VPP Communications Library (VCL) event handler. + * + * Definitions for generic event handling in VCL. + */ + +int +vce_generate_event (vce_event_thread_t *evt, u32 ev_idx) +{ + int elts, rv = 0; + vce_event_t *p; + + pthread_mutex_lock (&(evt->generator_lock)); + + /* Check there is event data for this event */ + + clib_spinlock_lock (&(evt->events_lockp)); + p = pool_elt_at_index (evt->vce_events, ev_idx); + ASSERT(p); + + elts = (int) clib_fifo_free_elts (evt->event_index_fifo); + if (PREDICT_TRUE (elts)) + { + /* Add event to queue */ + clib_fifo_add1 (evt->event_index_fifo, ev_idx); + pthread_cond_signal (&(evt->generator_cond)); + } + else + { + rv = VNET_API_ERROR_QUEUE_FULL; + } + + clib_spinlock_unlock (&(evt->events_lockp)); + pthread_mutex_unlock (&(evt->generator_lock)); + + return rv; +} + +void +vce_clear_event (vce_event_thread_t *evt, vce_event_t *ev) +{ + clib_spinlock_lock (&(evt->events_lockp)); + pool_put (evt->vce_events, ev); + clib_spinlock_unlock (&(evt->events_lockp)); +} + +vce_event_t * +vce_get_event_from_index(vce_event_thread_t *evt, u32 ev_idx) +{ + vce_event_t *ev; + + clib_spinlock_lock (&(evt->events_lockp)); + ev = pool_elt_at_index (evt->vce_events, ev_idx); + clib_spinlock_unlock (&(evt->events_lockp)); + + return ev; + +} + +vce_event_handler_reg_t * +vce_register_handler (vce_event_thread_t *evt, vce_event_key_t *evk, + vce_event_callback_t cb) +{ + vce_event_handler_reg_t *handler; + vce_event_handler_reg_t *old_handler = 0; + uword *p; + u32 handler_index; + u64 adj_key; + + /* TODO - multiple handler support. For now we can replace + * and re-instate, which is useful for event recycling */ + + adj_key = evk->as_u64 | (1LL << 63); //evk can be 0, which won't hash + + clib_spinlock_lock (&evt->handlers_lockp); + + p = hash_get (evt->handlers_index_by_event_key, adj_key); + if (p) + { + old_handler = pool_elt_at_index (evt->vce_event_handlers, p[0]); + /* If we are just re-registering, ignore and move on + * else store the old handler_fn for unregister to re-instate */ + if (old_handler->handler_fn == cb) + { + + clib_spinlock_unlock (&evt->handlers_lockp); + + /* Signal event thread that a handler exists in case any + * recycled events requiring this handler are pending */ + pthread_mutex_lock (&(evt->generator_lock)); + pthread_cond_signal (&(evt->generator_cond)); + pthread_mutex_unlock (&(evt->generator_lock)); + return old_handler; + } + } + + pool_get (evt->vce_event_handlers, handler); + handler_index = (u32) (handler - evt->vce_event_handlers); + + handler->handler_fn = cb; + handler->replaced_handler_idx = (p) ? p[0] : ~0; + + hash_set (evt->handlers_index_by_event_key, adj_key, handler_index); + + pthread_cond_init (&(handler->handler_cond), NULL); + pthread_mutex_init (&(handler->handler_lock), NULL); + + clib_spinlock_unlock (&evt->handlers_lockp); + + /* Signal event thread that a new handler exists in case any + * recycled events requiring this handler are pending */ + pthread_mutex_lock (&(evt->generator_lock)); + pthread_cond_signal (&(evt->generator_cond)); + pthread_mutex_unlock (&(evt->generator_lock)); + + return handler; +} + +int +vce_unregister_handler (vce_event_thread_t *evt, vce_event_t *ev) +{ + vce_event_handler_reg_t *handler; + uword *p; + u64 adj_key = ev->evk.as_u64 | (1LL << 63); + u8 generate_signal = 0; + + clib_spinlock_lock (&evt->handlers_lockp); + + p = hash_get (evt->handlers_index_by_event_key, adj_key); + if (!p) + { + clib_spinlock_unlock (&evt->handlers_lockp); + + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + + handler = pool_elt_at_index (evt->vce_event_handlers, p[0]); + + /* If this handler replaced another handler, re-instate it */ + if (handler->replaced_handler_idx != ~0) + { + hash_set (evt->handlers_index_by_event_key, adj_key, + handler->replaced_handler_idx); + generate_signal = 1; + } + else + { + hash_unset (evt->handlers_index_by_event_key, adj_key); + } + + pthread_mutex_destroy (&(handler->handler_lock)); + pthread_cond_destroy (&(handler->handler_cond)); + pool_put (evt->vce_event_handlers, handler); + + clib_spinlock_unlock (&evt->handlers_lockp); + + if (generate_signal) + { + /* Signal event thread that a new handler exists in case any + * recycled events requiring this handler are pending */ + pthread_mutex_lock (&(evt->generator_lock)); + pthread_cond_signal (&(evt->generator_cond)); + pthread_mutex_unlock (&(evt->generator_lock)); + } + + return 0; +} + +void * +vce_event_thread_fn (void *arg) +{ + vce_event_thread_t *evt = (vce_event_thread_t *) arg; + vce_event_t *ev; + u32 ev_idx; + vce_event_handler_reg_t *handler; + uword *p; + u64 adj_key; + + evt->recycle_event = 1; // Used for recycling events with no handlers + + + do + { + pthread_mutex_lock (&(evt->generator_lock)); + while ( (clib_fifo_elts (evt->event_index_fifo) == 0) || + evt->recycle_event) + { + evt->recycle_event = 0; + pthread_cond_wait (&(evt->generator_cond), + &(evt->generator_lock)); + } + + /* Remove event */ + clib_spinlock_lock (&(evt->events_lockp)); + + clib_fifo_sub1 (evt->event_index_fifo, ev_idx); + ev = pool_elt_at_index (evt->vce_events, ev_idx); + + clib_spinlock_unlock (&(evt->events_lockp)); + + ASSERT(ev); + adj_key = ev->evk.as_u64 | (1LL << 63); + + clib_spinlock_lock (&evt->handlers_lockp); + + p = hash_get (evt->handlers_index_by_event_key, adj_key); + if (!p) + { + /* If an event falls in the woods, and there is no handler to hear it, + * does it make any sound? + * I don't know either, so lets try recycling the event */ + clib_fifo_add1 (evt->event_index_fifo, ev_idx); + evt->recycle_event = 1; + clib_spinlock_unlock (&evt->handlers_lockp); + goto unlock; + } + handler = pool_elt_at_index (evt->vce_event_handlers, p[0]); + handler->ev_idx = ev_idx; + + clib_spinlock_unlock (&evt->handlers_lockp); + + (handler->handler_fn)(handler); + + unlock: + pthread_mutex_unlock (&(evt->generator_lock)); + } + while (1); + return NULL; +} + +int +vce_start_event_thread (vce_event_thread_t *evt, u8 max_events) +{ + clib_fifo_validate (evt->event_index_fifo, max_events); + evt->handlers_index_by_event_key = hash_create (0, sizeof (uword)); + + pthread_cond_init (&(evt->generator_cond), NULL); + pthread_mutex_init (&(evt->generator_lock), NULL); + + clib_spinlock_init (&(evt->events_lockp)); + clib_spinlock_init (&(evt->handlers_lockp)); + + return pthread_create (&(evt->thread), NULL /* attr */ , + vce_event_thread_fn, evt); +}
\ No newline at end of file diff --git a/src/vcl/vcl_event.h b/src/vcl/vcl_event.h new file mode 100644 index 00000000000..9380f73f77d --- /dev/null +++ b/src/vcl/vcl_event.h @@ -0,0 +1,154 @@ +/* + * 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. + */ + +#ifndef VPP_VCL_EVENT_H +#define VPP_VCL_EVENT_H + +/** + * @file + * @brief VPP Communications Library (VCL) event handler. + * + * Declarations for generic event handling in VCL. + */ + +#include <vppinfra/types.h> +#include <vppinfra/lock.h> +#include <pthread.h> + +typedef union vce_event_key_ +{ + struct { + u32 eid; + u32 session_index; + }; + u64 as_u64; +} vce_event_key_t; + +typedef struct vce_event_ +{ + vce_event_key_t evk; + u32 refcnt; + void *data; +} vce_event_t; + +typedef void (*vce_event_callback_t) (void *reg /*vce_event_handler_reg_t* */); + +typedef struct vce_event_handler_reg_ +{ + vce_event_callback_t handler_fn; + pthread_mutex_t handler_lock; + pthread_cond_t handler_cond; + u32 ev_idx; + u32 replaced_handler_idx; +} vce_event_handler_reg_t; + +typedef struct vce_event_thread_ +{ + pthread_t thread; + pthread_mutex_t generator_lock; + pthread_cond_t generator_cond; + u32 *event_index_fifo; + u8 recycle_event; + clib_spinlock_t events_lockp; + vce_event_t *vce_events; //pool + clib_spinlock_t handlers_lockp; + vce_event_handler_reg_t *vce_event_handlers; //pool + uword *handlers_index_by_event_key; //hash +} vce_event_thread_t; + +/** + * @brief vce_generate_event + * - used to trigger an event in the event thread so that registered + * handlers are notified + * + * @param evt - vce_event_thread_t - event system state + * @param ev_idx - index to vce_event_thread_t vce_event pool + * + * @return success/failure rv + */ +int vce_generate_event (vce_event_thread_t *evt, u32 ev_idx); + +/** + * @brief vce_clear_event() + * - removes event from event_pool + * + * @param evt - vce_event_thread_t - event system state + * @param ev - vce_event_t - event to remove + */ +void vce_clear_event (vce_event_thread_t *evt, vce_event_t *ev); + +/** + * @brief vce_get_event_from_index() + * + * @param evt - vce_event_thread_t - event system state + * @param ev_idx - index to vce_event_thread_t vce_event pool + * + * @return vce_event_t * + */ +vce_event_t * vce_get_event_from_index(vce_event_thread_t *evt, u32 ev_idx); + +/** + * @brief vce_register_handler + * - used by functions who need to be notified that an event has occurred + * on a vce_event_key_t (i.e. event type (enum) and sessionID) + * - if a handler already exists, the index to the old handler is stored + * inside the new handler for re-instatement on vce_unregister_handler() + + * @param evt - vce_event_thread_t - event system state + * @param evk - vce_event_key_t current an eventID from enum in consumer and + * sessionID + * @param cb - vce_event_callback_t function to handle event + * @return vce_handler_reg_t - the function that needs event notification + * needs to block on a condvar mutex to reduce spin. That is in here. + */ +vce_event_handler_reg_t * vce_register_handler (vce_event_thread_t *evt, + vce_event_key_t *evk, + vce_event_callback_t cb); + +/** + * @brief vce_unregister_handler + * - used by functions to remove need to be notified that an event has occurred + * on a vce_event_key_t (i.e. event type (enum) and sessionID) + * - if this handler replaced an existing one, re-instate it. + * + * @param evt - vce_event_thread_t - event system state + * @param ev - vce_event_t - event to remove + * @return success/failure rv + */ +int vce_unregister_handler (vce_event_thread_t *evt, vce_event_t *ev); + +/** + * @brief vce_event_thread_fn + * - main event thread that waits on a generic condvar/mutex that a signal + * has been generated. + * - loops through all registered handlers for that vce_event_key_t + * (event enum + sessionID) + * + * @param arg - cast to type of event defined in consuming program. + * @return + */ +extern void * vce_event_thread_fn (void *arg); + +/** + * @brief vce_start_event_thread + * - as name suggests. What is important is that vce_event_thread_t is allocated + * on the same heap as "everything else". ie use clib_mem_alloc. + * @param evt - vce_event_thread_t - event system state + * @param max_events - depth of event FIFO for max number of outstanding events. + * @return succes/failure + */ +int vce_start_event_thread (vce_event_thread_t *evt, u8 max_events); + +#endif //VPP_VCL_EVENT_H diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c index c7cd1e992b4..bb248699fd9 100644 --- a/src/vcl/vppcom.c +++ b/src/vcl/vppcom.c @@ -21,6 +21,7 @@ #include <vpp/api/vpe_msg_enum.h> #include <vnet/session/application_interface.h> #include <vcl/vppcom.h> +#include <vcl/vcl_event.h> #include <vlib/unix/unix.h> #include <vppinfra/vec_bootstrap.h> #include <vppinfra/elog.h> @@ -188,6 +189,20 @@ typedef struct vppcom_cfg_t_ u8 *vpp_api_filename; } vppcom_cfg_t; +/* VPPCOM Event typedefs */ +typedef enum vcl_event_id_ +{ + VCL_EVENT_CONNECT_REQ_ACCEPTED, + VCL_EVENT_N_EVENTS +} vcl_event_id_t; + +typedef struct vce_event_connect_request_ +{ + u8 size; + u8 handled; + u32 accepted_session_index; +} vce_event_connect_request_t; + typedef struct vppcom_main_t_ { u8 init; @@ -227,7 +242,10 @@ typedef struct vppcom_main_t_ vppcom_cfg_t cfg; - /* Event logging */ + /* Event thread */ + vce_event_thread_t event_thread; + + /* VPP Event-logger */ elog_main_t elog_main; elog_track_t elog_track; @@ -333,6 +351,7 @@ vppcom_session_state_str (session_state_t state) return st; } + /* * VPPCOM Utility Functions */ @@ -415,6 +434,68 @@ write_elog (void) } +/* + * VPPCOM Event Functions + */ + +/** + * * @brief vce_connect_request_handler_fn + * - used for listener sessions + * - when a vl_api_accept_session_t_handler() generates an event + * this callback is alerted and sets fields that consumers such as + * vppcom_session_accept() expect to see, ie. accepted_client_index + * + * @param arg - void* to be cast to vce_event_handler_reg_t* + */ +void +vce_connect_request_handler_fn (void *arg) +{ + vce_event_handler_reg_t *reg = (vce_event_handler_reg_t *) arg; + + vce_event_connect_request_t *ecr; + vce_event_t *ev; + + ev = vce_get_event_from_index (&vcm->event_thread, reg->ev_idx); + + ecr = (vce_event_connect_request_t *) ev->data; + + pthread_mutex_lock (®->handler_lock); + ecr->handled = 1; + pthread_cond_signal (®->handler_cond); + pthread_mutex_unlock (®->handler_lock); +} + +/** + * @brief vce_epoll_wait_connect_request_handler_fn + * - used by vppcom_epoll_xxxx() for listener sessions + * - when a vl_api_accept_session_t_handler() generates an event + * this callback is alerted and sets the fields that vppcom_epoll_wait() + * expects to see. + * + * @param arg - void* to be cast to vce_event_handler_reg_t* + */ +void +vce_epoll_wait_connect_request_handler_fn (void *arg) +{ + vce_event_handler_reg_t *reg = (vce_event_handler_reg_t *) arg; + vce_event_t *ev; + /* Retrieve the VCL_EVENT_CONNECT_REQ_ACCEPTED event */ + ev = vce_get_event_from_index (&vcm->event_thread, reg->ev_idx); + vce_event_connect_request_t *ecr = (vce_event_connect_request_t *) ev->data; + + /* Add the accepted_session_index to the FIFO */ + clib_spinlock_lock (&vcm->sessions_lockp); + clib_fifo_add1 (vcm->client_session_index_fifo, + ecr->accepted_session_index); + clib_spinlock_unlock (&vcm->sessions_lockp); + + /* Recycling the event. */ + clib_spinlock_lock (&(vcm->event_thread.events_lockp)); + vcm->event_thread.recycle_event = 1; + clib_fifo_add1 (vcm->event_thread.event_index_fifo, reg->ev_idx); + clib_spinlock_unlock (&(vcm->event_thread.events_lockp)); +} + static int vppcom_connect_to_vpp (char *app_name) { @@ -438,7 +519,7 @@ vppcom_connect_to_vpp (char *app_name) else { vcm->vl_input_queue = am->shmem_hdr->vl_input_queue; - vcm->my_client_index = am->my_client_index; + vcm->my_client_index = (u32) am->my_client_index; vcm->app_state = STATE_APP_CONN_VPP; if (VPPCOM_DEBUG > 0) @@ -471,7 +552,7 @@ vppcom_connect_to_vpp (char *app_name) u32 data; } *ed; ed = ELOG_TRACK_DATA (&vcm->elog_main, e, vcm->elog_track); - ed->data = rv; + ed->data = (u32) rv; /* *INDENT-ON* */ } return rv; @@ -599,47 +680,6 @@ vppcom_wait_for_session_state_change (u32 session_index, return VPPCOM_ETIMEDOUT; } -static inline int -vppcom_wait_for_client_session_index (f64 wait_for_time) -{ - f64 timeout = clib_time_now (&vcm->clib_time) + wait_for_time; - - do - { - if (clib_fifo_elts (vcm->client_session_index_fifo)) - return VPPCOM_OK; - } - while (clib_time_now (&vcm->clib_time) < timeout); - - if (wait_for_time == 0) - return VPPCOM_EAGAIN; - - if (VPPCOM_DEBUG > 0) - clib_warning ("VCL<%d>: timeout waiting for client_session_index", - getpid ()); - - if (VPPCOM_DEBUG > 0) - { - /* *INDENT-OFF* */ - ELOG_TYPE_DECLARE (e) = - { - .format = "ERR: timeout waiting for session index :%d", - .format_args = "i4", - }; - struct - { - u32 data; - } *ed; - - ed = ELOG_TRACK_DATA (&vcm->elog_main, e, vcm->elog_track); - - ed->data = getpid(); - /* *INDENT-ON* */ - } - - return VPPCOM_ETIMEDOUT; -} - /* * VPP-API message functions */ @@ -744,6 +784,7 @@ vppcom_app_attach (void) getpid (), rv, vppcom_retval_str (rv)); return rv; } + return VPPCOM_OK; } @@ -1235,6 +1276,11 @@ vl_api_accept_session_t_handler (vl_api_accept_session_t * mp) svm_fifo_t *rx_fifo, *tx_fifo; session_t *session, *listen_session; u32 session_index; + vce_event_connect_request_t *ecr; + vce_event_t *ev; + int rv; + u32 ev_idx; + clib_spinlock_lock (&vcm->sessions_lockp); if (!clib_fifo_free_elts (vcm->client_session_index_fifo)) @@ -1252,10 +1298,15 @@ vl_api_accept_session_t_handler (vl_api_accept_session_t * mp) clib_warning ("VCL<%d>: ERROR: couldn't find listen session: " "unknown vpp listener handle %llx", getpid (), mp->listener_handle); + vppcom_send_accept_session_reply (mp->handle, mp->context, + VNET_API_ERROR_INVALID_ARGUMENT); clib_spinlock_unlock (&vcm->sessions_lockp); return; } + /* TODO check listener depth and update */ + /* TODO on "child" fd close, update listener depth */ + /* Allocate local session and set it up */ pool_get (vcm->sessions, session); memset (session, 0, sizeof (*session)); @@ -1283,8 +1334,26 @@ vl_api_accept_session_t_handler (vl_api_accept_session_t * mp) session->lcl_port = listen_session->lcl_port; session->lcl_addr = listen_session->lcl_addr; - /* TBD: move client_session_index_fifo into listener session */ - clib_fifo_add1 (vcm->client_session_index_fifo, session_index); + /* Create an event for handlers */ + + clib_spinlock_lock (&vcm->event_thread.events_lockp); + + pool_get (vcm->event_thread.vce_events, ev); + ev->data = clib_mem_alloc (sizeof (vce_event_connect_request_t)); + ev->refcnt = 0; + ev_idx = (u32) (ev - vcm->event_thread.vce_events); + ecr = ev->data; + ev->evk.eid = VCL_EVENT_CONNECT_REQ_ACCEPTED; + listen_session = vppcom_session_table_lookup_listener (mp->listener_handle); + ev->evk.session_index = (u32) (listen_session - vcm->sessions); + ecr->handled = 0; + ecr->accepted_session_index = session_index; + + clib_spinlock_unlock (&vcm->event_thread.events_lockp); + + rv = vce_generate_event (&vcm->event_thread, ev_idx); + + ASSERT (rv == 0); if (VPPCOM_DEBUG > 1) clib_warning ("VCL<%d>: vpp handle 0x%llx, sid %u: client accept " @@ -1336,124 +1405,6 @@ vl_api_accept_session_t_handler (vl_api_accept_session_t * mp) } static void -vppcom_send_connect_session_reply (session_t * session, u32 session_index, - u64 vpp_handle, u32 context, int retval) -{ - vl_api_connect_session_reply_t *rmp; - u32 len; - svm_queue_t *client_q; - - rmp = vl_msg_api_alloc (sizeof (*rmp)); - memset (rmp, 0, sizeof (*rmp)); - rmp->_vl_msg_id = ntohs (VL_API_CONNECT_SESSION_REPLY); - - if (!session) - { - rmp->context = context; - rmp->handle = vpp_handle; - rmp->retval = htonl (retval); - vl_msg_api_send_shmem (vcm->vl_input_queue, (u8 *) & rmp); - return; - } - - rmp->context = session->client_context; - rmp->retval = htonl (retval); - rmp->handle = session->vpp_handle; - rmp->server_rx_fifo = pointer_to_uword (session->rx_fifo); - rmp->server_tx_fifo = pointer_to_uword (session->tx_fifo); - rmp->vpp_event_queue_address = pointer_to_uword (session->vpp_event_queue); - rmp->segment_size = vcm->cfg.segment_size; - len = vec_len (session->segment_name); - rmp->segment_name_length = clib_min (len, sizeof (rmp->segment_name)); - clib_memcpy (rmp->segment_name, session->segment_name, - rmp->segment_name_length - 1); - clib_memcpy (rmp->lcl_ip, session->peer_addr.ip46.as_u8, - sizeof (rmp->lcl_ip)); - rmp->is_ip4 = session->peer_addr.is_ip4; - rmp->lcl_port = session->peer_port; - client_q = uword_to_pointer (session->client_queue_address, svm_queue_t *); - ASSERT (client_q); - vl_msg_api_send_shmem (client_q, (u8 *) & rmp); -} - -/* - * Acting as server for redirected connect requests - */ -static void -vl_api_connect_sock_t_handler (vl_api_connect_sock_t * mp) -{ - u32 session_index; - session_t *session = 0; - - clib_spinlock_lock (&vcm->sessions_lockp); - if (!clib_fifo_free_elts (vcm->client_session_index_fifo)) - { - clib_spinlock_unlock (&vcm->sessions_lockp); - - if (VPPCOM_DEBUG > 1) - clib_warning ("VCL<%d>: client session queue is full!", getpid ()); - - /* TBD: Fix api to include vpp handle */ - vppcom_send_connect_session_reply (0 /* session */ , 0 /* sid */ , - 0 /* handle */ , mp->context, - VNET_API_ERROR_QUEUE_FULL); - return; - } - - pool_get (vcm->sessions, session); - memset (session, 0, sizeof (*session)); - session_index = session - vcm->sessions; - - session->client_context = mp->context; - session->vpp_handle = session_index; - session->client_queue_address = mp->client_queue_address; - session->lcl_port = mp->port; - session->lcl_addr.is_ip4 = mp->is_ip4; - clib_memcpy (&session->lcl_addr.ip46, mp->ip, - sizeof (session->lcl_addr.ip46)); - - /* TBD: missing peer info in api msg. - */ - session->peer_addr.is_ip4 = mp->is_ip4; - ASSERT (session->lcl_addr.is_ip4 == session->peer_addr.is_ip4); - - session->state = STATE_ACCEPT; - clib_fifo_add1 (vcm->client_session_index_fifo, session_index); - if (VPPCOM_DEBUG > 1) - clib_warning ("VCL<%d>: sid %u: Got a cut-thru connect request! " - "clib_fifo_elts %u!\n", getpid (), session_index, - clib_fifo_elts (vcm->client_session_index_fifo)); - - if (VPPCOM_DEBUG > 0) - { - session->elog_track.name = - (char *) format (0, "C:%d:S:%d%c", vcm->my_client_index, - session_index, 0); - elog_track_register (&vcm->elog_main, &session->elog_track); - - /* *INDENT-OFF* */ - ELOG_TYPE_DECLARE (e) = - { - .format = "cut-thru-connect:S:%d clib_fifo_elts:%d", - .format_args = "i4i4", - }; - - struct - { - u32 data[2]; - } *ed; - - ed = ELOG_TRACK_DATA (&vcm->elog_main, e, session->elog_track); - - ed->data[0] = session_index; - ed->data[1] = clib_fifo_elts (vcm->client_session_index_fifo); - /* *INDENT-ON* */ - } - - clib_spinlock_unlock (&vcm->sessions_lockp); -} - -static void vppcom_send_bind_sock (session_t * session, u32 session_index) { vl_api_bind_sock_t *bmp; @@ -1603,7 +1554,6 @@ _(SESSION_ENABLE_DISABLE_REPLY, session_enable_disable_reply) \ _(BIND_SOCK_REPLY, bind_sock_reply) \ _(UNBIND_SOCK_REPLY, unbind_sock_reply) \ _(ACCEPT_SESSION, accept_session) \ -_(CONNECT_SOCK, connect_sock) \ _(CONNECT_SESSION_REPLY, connect_session_reply) \ _(DISCONNECT_SESSION, disconnect_session) \ _(DISCONNECT_SESSION_REPLY, disconnect_session_reply) \ @@ -2312,6 +2262,8 @@ vppcom_app_create (char *app_name) if (vcm->my_client_index == ~0) { + + /* API hookup and connect to VPP */ vppcom_api_hookup (); vcm->app_state = STATE_APP_START; rv = vppcom_connect_to_vpp (app_name); @@ -2322,6 +2274,11 @@ vppcom_app_create (char *app_name) return rv; } + /* State event handling thread */ + + rv = vce_start_event_thread (&(vcm->event_thread), 20); + + if (VPPCOM_DEBUG > 0) clib_warning ("VCL<%d>: sending session enable", getpid ()); @@ -2645,7 +2602,7 @@ vppcom_session_bind (uint32_t session_index, vppcom_endpt_t * ep) { if (session->lcl_addr.is_ip4) { - /* *INDENT-OFF* */ + /* *INDENT-OFF* */ ELOG_TYPE_DECLARE (e) = { .format = "bind local:%s:%d.%d.%d.%d:%d ", @@ -2658,7 +2615,7 @@ vppcom_session_bind (uint32_t session_index, vppcom_endpt_t * ep) u8 proto; u8 addr[4]; u16 port; - }) * ed; + }) *ed; ed = ELOG_TRACK_DATA (&vcm->elog_main, e, session->elog_track); ed->proto = session->proto; @@ -2740,64 +2697,108 @@ done: } int -vppcom_session_accept (uint32_t listen_session_index, vppcom_endpt_t * ep, - uint32_t flags) +validate_args_session_accept_ (session_t * listen_session) { - session_t *listen_session = 0; - session_t *client_session = 0; - u32 client_session_index = ~0; - int rv; - f64 wait_for; - u64 listen_vpp_handle; - - VCL_LOCK_AND_GET_SESSION (listen_session_index, &listen_session); + u32 listen_session_index = listen_session - vcm->sessions; + /* Input validation - expects spinlock on sessions_lockp */ if (listen_session->is_vep) { - clib_spinlock_unlock (&vcm->sessions_lockp); clib_warning ("VCL<%d>: ERROR: sid %u: cannot accept on an " "epoll session!", getpid (), listen_session_index); - rv = VPPCOM_EBADFD; - goto done; + return VPPCOM_EBADFD; } - listen_vpp_handle = listen_session->vpp_handle; if (listen_session->state != STATE_LISTEN) { clib_warning ("VCL<%d>: ERROR: vpp handle 0x%llx, sid %u: " "not in listen state! state 0x%x (%s)", getpid (), - listen_vpp_handle, listen_session_index, + listen_session->vpp_handle, listen_session_index, listen_session->state, vppcom_session_state_str (listen_session->state)); + return VPPCOM_EBADFD; + } + return VPPCOM_OK; +} + +int +vppcom_session_accept (uint32_t listen_session_index, vppcom_endpt_t * ep, + uint32_t flags) +{ + session_t *listen_session = 0; + session_t *client_session = 0; + u32 client_session_index = ~0; + int rv; + u64 listen_vpp_handle; + vce_event_handler_reg_t *reg; + vce_event_t *ev; + vce_event_connect_request_t *result; + struct timespec ts; + struct timeval tv; + int millisecond_timeout = 1; + int hours_timeout = 20 * 60 * 60; + + VCL_LOCK_AND_GET_SESSION (listen_session_index, &listen_session); + listen_vpp_handle = listen_session->vpp_handle; // For debugging + + rv = validate_args_session_accept_ (listen_session); + if (rv) + { clib_spinlock_unlock (&vcm->sessions_lockp); - rv = VPPCOM_EBADFD; goto done; } - wait_for = (VCL_SESS_ATTR_TEST (listen_session->attr, - VCL_SESS_ATTR_NONBLOCK)) - ? 0 : vcm->cfg.accept_timeout; + + /* Using an aggressive timer of 1ms and a generous timer of + * 20 hours, we can implement a blocking and non-blocking listener + * as both event and time driven */ + gettimeofday (&tv, NULL); + ts.tv_nsec = (tv.tv_usec * 1000) + (1000 * millisecond_timeout); + ts.tv_sec = tv.tv_sec; + + /* Predict that the Listener is blocking more often than not */ + if (PREDICT_TRUE (!VCL_SESS_ATTR_TEST (listen_session->attr, + VCL_SESS_ATTR_NONBLOCK))) + ts.tv_sec += hours_timeout; clib_spinlock_unlock (&vcm->sessions_lockp); - while (1) + /* Register handler for connect_request event on listen_session_index */ + vce_event_key_t evk; + evk.session_index = listen_session_index; + evk.eid = VCL_EVENT_CONNECT_REQ_ACCEPTED; + reg = vce_register_handler (&vcm->event_thread, &evk, + vce_connect_request_handler_fn); + ev = vce_get_event_from_index (&vcm->event_thread, reg->ev_idx); + + result = (vce_event_connect_request_t *) ev->data; + pthread_mutex_lock (®->handler_lock); + while (!result->handled) { - rv = vppcom_wait_for_client_session_index (wait_for); - if (rv) + rv = + pthread_cond_timedwait (®->handler_cond, ®->handler_lock, &ts); + if (rv == ETIMEDOUT) { - if ((VPPCOM_DEBUG > 0)) - clib_warning ("VCL<%d>: vpp handle 0x%llx, sid %u: " - "accept failed! returning %d (%s)", getpid (), - listen_vpp_handle, listen_session_index, - rv, vppcom_retval_str (rv)); - if (wait_for == 0) - goto done; + rv = VPPCOM_EAGAIN; + goto cleanup; } - else - break; } + client_session_index = result->accepted_session_index; + + + /* Remove from the FIFO used to service epoll */ clib_spinlock_lock (&vcm->sessions_lockp); - clib_fifo_sub1 (vcm->client_session_index_fifo, client_session_index); + if (clib_fifo_elts (vcm->client_session_index_fifo)) + { + u32 tmp_client_session_index; + clib_fifo_sub1 (vcm->client_session_index_fifo, + tmp_client_session_index); + if (tmp_client_session_index != client_session_index) + clib_fifo_add1 (vcm->client_session_index_fifo, + tmp_client_session_index); + } + clib_spinlock_unlock (&vcm->sessions_lockp); + rv = vppcom_session_at_index (client_session_index, &client_session); if (PREDICT_FALSE (rv)) { @@ -2887,7 +2888,7 @@ vppcom_session_accept (uint32_t listen_session_index, vppcom_endpt_t * ep, u32 session; u8 addr[4]; u16 port; - }) * ed2; + }) *ed2; ed2 = ELOG_TRACK_DATA (&vcm->elog_main, e2, client_session->elog_track); @@ -2903,6 +2904,11 @@ vppcom_session_accept (uint32_t listen_session_index, vppcom_endpt_t * ep, clib_spinlock_unlock (&vcm->sessions_lockp); rv = (int) client_session_index; + + vce_clear_event (&vcm->event_thread, ev); +cleanup: + vce_unregister_handler (&vcm->event_thread, ev); + pthread_mutex_unlock (®->handler_lock); done: return rv; } @@ -3129,7 +3135,9 @@ vppcom_session_read_ready (session_t * session, u32 session_index) } if (session->state & STATE_LISTEN) - ready = clib_fifo_elts (vcm->client_session_index_fifo); + { + ready = clib_fifo_elts (vcm->client_session_index_fifo); + } else { if (!(state & (SERVER_STATE_OPEN | CLIENT_STATE_OPEN | STATE_LISTEN))) @@ -3686,6 +3694,8 @@ vppcom_epoll_ctl (uint32_t vep_idx, int op, uint32_t session_index, { session_t *vep_session; session_t *session; + vce_event_handler_reg_t *reg = 0; + vce_event_t *ev = 0; int rv; if (vep_idx == session_index) @@ -3761,6 +3771,17 @@ vppcom_epoll_ctl (uint32_t vep_idx, int op, uint32_t session_index, session->is_vep = 0; session->is_vep_session = 1; vep_session->vep.next_sid = session_index; + + /* VCL Event Register handler */ + if (session->state & STATE_LISTEN) + { + /* Register handler for connect_request event on listen_session_index */ + vce_event_key_t evk; + evk.session_index = session_index; + evk.eid = VCL_EVENT_CONNECT_REQ_ACCEPTED; + reg = vce_register_handler (&vcm->event_thread, &evk, + vce_epoll_wait_connect_request_handler_fn); + } if (VPPCOM_DEBUG > 1) clib_warning ("VCL<%d>: EPOLL_CTL_ADD: vep_idx %u, " "sid %u, events 0x%x, data 0x%llx!", @@ -3839,6 +3860,13 @@ vppcom_epoll_ctl (uint32_t vep_idx, int op, uint32_t session_index, goto done; } + /* VCL Event Un-register handler */ + if ((session->state & STATE_LISTEN) && reg) + { + ev = vce_get_event_from_index (&vcm->event_thread, reg->ev_idx); + vce_unregister_handler (&vcm->event_thread, ev); + } + vep_session->wait_cont_idx = (vep_session->wait_cont_idx == session_index) ? session->vep.next_sid : vep_session->wait_cont_idx; @@ -4460,7 +4488,7 @@ vppcom_session_attr (uint32_t session_index, uint32_t op, }; CLIB_PACKED (struct { i32 data; - }) * ed; + }) *ed; ed = ELOG_TRACK_DATA (&vcm->elog_main, e, session->elog_track); ed->data = session->libc_epfd; |