| /* |
| * Copyright (c) 2017-2019 Cisco and/or its affiliates. |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * 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 <math.h> |
| #include <vlib/vlib.h> |
| #include <vnet/vnet.h> |
| #include <vppinfra/elog.h> |
| #include <vnet/session/transport.h> |
| #include <vnet/session/session.h> |
| #include <vnet/session/application.h> |
| #include <vnet/session/application_interface.h> |
| #include <vnet/session/application_local.h> |
| #include <vnet/session/session_debug.h> |
| #include <svm/queue.h> |
| #include <sys/timerfd.h> |
| |
| static inline void |
| session_wrk_send_evt_to_main (session_worker_t *wrk, session_evt_elt_t *elt) |
| { |
| session_evt_elt_t *he; |
| uword thread_index; |
| u8 is_empty; |
| |
| thread_index = wrk->vm->thread_index; |
| he = clib_llist_elt (wrk->event_elts, wrk->evts_pending_main); |
| is_empty = clib_llist_is_empty (wrk->event_elts, evt_list, he); |
| clib_llist_add_tail (wrk->event_elts, evt_list, elt, he); |
| if (is_empty) |
| session_send_rpc_evt_to_thread (0, session_wrk_handle_evts_main_rpc, |
| uword_to_pointer (thread_index, void *)); |
| } |
| |
| #define app_check_thread_and_barrier(_wrk, _elt) \ |
| if (!vlib_thread_is_main_w_barrier ()) \ |
| { \ |
| session_wrk_send_evt_to_main (wrk, elt); \ |
| return; \ |
| } |
| |
| static void |
| session_wrk_timerfd_update (session_worker_t *wrk, u64 time_ns) |
| { |
| struct itimerspec its; |
| |
| its.it_value.tv_sec = 0; |
| its.it_value.tv_nsec = time_ns; |
| its.it_interval.tv_sec = 0; |
| its.it_interval.tv_nsec = its.it_value.tv_nsec; |
| |
| if (timerfd_settime (wrk->timerfd, 0, &its, NULL) == -1) |
| clib_warning ("timerfd_settime"); |
| } |
| |
| always_inline u64 |
| session_wrk_tfd_timeout (session_wrk_state_t state, u32 thread_index) |
| { |
| if (state == SESSION_WRK_INTERRUPT) |
| return thread_index ? 1e6 : vlib_num_workers () ? 5e8 : 1e6; |
| else if (state == SESSION_WRK_IDLE) |
| return thread_index ? 1e8 : vlib_num_workers () ? 5e8 : 1e8; |
| else |
| return 0; |
| } |
| |
| static inline void |
| session_wrk_set_state (session_worker_t *wrk, session_wrk_state_t state) |
| { |
| u64 time_ns; |
| |
| wrk->state = state; |
| if (wrk->timerfd == -1) |
| return; |
| time_ns = session_wrk_tfd_timeout (state, wrk->vm->thread_index); |
| session_wrk_timerfd_update (wrk, time_ns); |
| } |
| |
| static transport_endpt_ext_cfg_t * |
| session_mq_get_ext_config (application_t *app, uword offset) |
| { |
| svm_fifo_chunk_t *c; |
| fifo_segment_t *fs; |
| |
| fs = application_get_rx_mqs_segment (app); |
| c = fs_chunk_ptr (fs->h, offset); |
| return (transport_endpt_ext_cfg_t *) c->data; |
| } |
| |
| static void |
| session_mq_free_ext_config (application_t *app, uword offset) |
| { |
| svm_fifo_chunk_t *c; |
| fifo_segment_t *fs; |
| |
| fs = application_get_rx_mqs_segment (app); |
| c = fs_chunk_ptr (fs->h, offset); |
| fifo_segment_collect_chunk (fs, 0 /* only one slice */, c); |
| } |
| |
| static void |
| session_mq_listen_handler (session_worker_t *wrk, session_evt_elt_t *elt) |
| { |
| vnet_listen_args_t _a, *a = &_a; |
| session_listen_msg_t *mp; |
| app_worker_t *app_wrk; |
| application_t *app; |
| int rv; |
| |
| app_check_thread_and_barrier (wrk, elt); |
| |
| mp = session_evt_ctrl_data (wrk, elt); |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| clib_memset (a, 0, sizeof (*a)); |
| a->sep.is_ip4 = mp->is_ip4; |
| ip_copy (&a->sep.ip, &mp->ip, mp->is_ip4); |
| a->sep.port = mp->port; |
| a->sep.fib_index = mp->vrf; |
| a->sep.sw_if_index = ENDPOINT_INVALID_INDEX; |
| a->sep.transport_proto = mp->proto; |
| a->app_index = app->app_index; |
| a->wrk_map_index = mp->wrk_index; |
| a->sep_ext.transport_flags = mp->flags; |
| |
| if (mp->ext_config) |
| a->sep_ext.ext_cfg = session_mq_get_ext_config (app, mp->ext_config); |
| |
| if ((rv = vnet_listen (a))) |
| clib_warning ("listen returned: %U", format_session_error, rv); |
| |
| app_wrk = application_get_worker (app, mp->wrk_index); |
| mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv); |
| |
| if (mp->ext_config) |
| session_mq_free_ext_config (app, mp->ext_config); |
| } |
| |
| static void |
| session_mq_listen_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt) |
| { |
| vnet_listen_args_t _a, *a = &_a; |
| session_listen_uri_msg_t *mp; |
| app_worker_t *app_wrk; |
| application_t *app; |
| int rv; |
| |
| app_check_thread_and_barrier (wrk, elt); |
| |
| mp = session_evt_ctrl_data (wrk, elt); |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| clib_memset (a, 0, sizeof (*a)); |
| a->uri = (char *) mp->uri; |
| a->app_index = app->app_index; |
| rv = vnet_bind_uri (a); |
| |
| app_wrk = application_get_worker (app, 0); |
| mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv); |
| } |
| |
| static void |
| session_mq_connect_one (session_connect_msg_t *mp) |
| { |
| vnet_connect_args_t _a, *a = &_a; |
| app_worker_t *app_wrk; |
| application_t *app; |
| int rv; |
| |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| clib_memset (a, 0, sizeof (*a)); |
| a->sep.is_ip4 = mp->is_ip4; |
| clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip)); |
| a->sep.port = mp->port; |
| a->sep.transport_proto = mp->proto; |
| a->sep.peer.fib_index = mp->vrf; |
| a->sep.dscp = mp->dscp; |
| clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip)); |
| if (mp->is_ip4) |
| { |
| ip46_address_mask_ip4 (&a->sep.ip); |
| ip46_address_mask_ip4 (&a->sep.peer.ip); |
| } |
| a->sep.peer.port = mp->lcl_port; |
| a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX; |
| a->sep_ext.parent_handle = mp->parent_handle; |
| a->sep_ext.transport_flags = mp->flags; |
| a->api_context = mp->context; |
| a->app_index = app->app_index; |
| a->wrk_map_index = mp->wrk_index; |
| |
| if (mp->ext_config) |
| a->sep_ext.ext_cfg = session_mq_get_ext_config (app, mp->ext_config); |
| |
| if ((rv = vnet_connect (a))) |
| { |
| clib_warning ("connect returned: %U", format_session_error, rv); |
| app_wrk = application_get_worker (app, mp->wrk_index); |
| mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0, rv); |
| } |
| |
| if (mp->ext_config) |
| session_mq_free_ext_config (app, mp->ext_config); |
| } |
| |
| static void |
| session_mq_handle_connects_rpc (void *arg) |
| { |
| u32 max_connects = 32, n_connects = 0; |
| session_evt_elt_t *he, *elt, *next; |
| session_worker_t *fwrk; |
| |
| ASSERT (session_vlib_thread_is_cl_thread ()); |
| |
| /* Pending connects on linked list pertaining to first worker */ |
| fwrk = session_main_get_worker (transport_cl_thread ()); |
| if (!fwrk->n_pending_connects) |
| return; |
| |
| he = clib_llist_elt (fwrk->event_elts, fwrk->pending_connects); |
| elt = clib_llist_next (fwrk->event_elts, evt_list, he); |
| |
| /* Avoid holding the worker for too long */ |
| while (n_connects < max_connects && elt != he) |
| { |
| next = clib_llist_next (fwrk->event_elts, evt_list, elt); |
| clib_llist_remove (fwrk->event_elts, evt_list, elt); |
| session_mq_connect_one (session_evt_ctrl_data (fwrk, elt)); |
| session_evt_ctrl_data_free (fwrk, elt); |
| clib_llist_put (fwrk->event_elts, elt); |
| elt = next; |
| n_connects += 1; |
| } |
| |
| /* Decrement with worker barrier */ |
| fwrk->n_pending_connects -= n_connects; |
| if (fwrk->n_pending_connects > 0) |
| { |
| session_send_rpc_evt_to_thread_force (fwrk->vm->thread_index, |
| session_mq_handle_connects_rpc, 0); |
| } |
| } |
| |
| static void |
| session_mq_connect_handler (session_worker_t *wrk, session_evt_elt_t *elt) |
| { |
| u32 thread_index = wrk - session_main.wrk; |
| session_evt_elt_t *he; |
| |
| if (PREDICT_FALSE (thread_index > transport_cl_thread ())) |
| { |
| clib_warning ("Connect on wrong thread. Dropping"); |
| return; |
| } |
| |
| /* If on worker, check if main has any pending messages. Avoids reordering |
| * with other control messages that need to be handled by main |
| */ |
| if (thread_index) |
| { |
| he = clib_llist_elt (wrk->event_elts, wrk->evts_pending_main); |
| |
| /* Events pending on main, postpone to avoid reordering */ |
| if (!clib_llist_is_empty (wrk->event_elts, evt_list, he)) |
| { |
| clib_llist_add_tail (wrk->event_elts, evt_list, elt, he); |
| return; |
| } |
| } |
| |
| /* Add to pending list to be handled by first worker */ |
| he = clib_llist_elt (wrk->event_elts, wrk->pending_connects); |
| clib_llist_add_tail (wrk->event_elts, evt_list, elt, he); |
| |
| /* Decremented with worker barrier */ |
| wrk->n_pending_connects += 1; |
| if (wrk->n_pending_connects == 1) |
| { |
| session_send_rpc_evt_to_thread_force (thread_index, |
| session_mq_handle_connects_rpc, 0); |
| } |
| } |
| |
| static void |
| session_mq_connect_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt) |
| { |
| vnet_connect_args_t _a, *a = &_a; |
| session_connect_uri_msg_t *mp; |
| app_worker_t *app_wrk; |
| application_t *app; |
| int rv; |
| |
| app_check_thread_and_barrier (wrk, elt); |
| |
| mp = session_evt_ctrl_data (wrk, elt); |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| clib_memset (a, 0, sizeof (*a)); |
| a->uri = (char *) mp->uri; |
| a->api_context = mp->context; |
| a->app_index = app->app_index; |
| if ((rv = vnet_connect_uri (a))) |
| { |
| clib_warning ("connect_uri returned: %d", rv); |
| app_wrk = application_get_worker (app, 0 /* default wrk only */ ); |
| mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0, rv); |
| } |
| } |
| |
| static void |
| session_mq_shutdown_handler (void *data) |
| { |
| session_shutdown_msg_t *mp = (session_shutdown_msg_t *) data; |
| vnet_shutdown_args_t _a, *a = &_a; |
| application_t *app; |
| |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| a->app_index = app->app_index; |
| a->handle = mp->handle; |
| vnet_shutdown_session (a); |
| } |
| |
| static void |
| session_mq_disconnect_handler (void *data) |
| { |
| session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data; |
| vnet_disconnect_args_t _a, *a = &_a; |
| application_t *app; |
| |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| a->app_index = app->app_index; |
| a->handle = mp->handle; |
| vnet_disconnect_session (a); |
| } |
| |
| static void |
| app_mq_detach_handler (session_worker_t *wrk, session_evt_elt_t *elt) |
| { |
| vnet_app_detach_args_t _a, *a = &_a; |
| session_app_detach_msg_t *mp; |
| application_t *app; |
| |
| app_check_thread_and_barrier (wrk, elt); |
| |
| mp = session_evt_ctrl_data (wrk, elt); |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| a->app_index = app->app_index; |
| a->api_client_index = mp->client_index; |
| vnet_application_detach (a); |
| } |
| |
| static void |
| session_mq_unlisten_handler (session_worker_t *wrk, session_evt_elt_t *elt) |
| { |
| vnet_unlisten_args_t _a, *a = &_a; |
| session_unlisten_msg_t *mp; |
| app_worker_t *app_wrk; |
| session_handle_t sh; |
| application_t *app; |
| int rv; |
| |
| app_check_thread_and_barrier (wrk, elt); |
| |
| mp = session_evt_ctrl_data (wrk, elt); |
| sh = mp->handle; |
| |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| clib_memset (a, 0, sizeof (*a)); |
| a->app_index = app->app_index; |
| a->handle = sh; |
| a->wrk_map_index = mp->wrk_index; |
| |
| if ((rv = vnet_unlisten (a))) |
| clib_warning ("unlisten returned: %d", rv); |
| |
| app_wrk = application_get_worker (app, a->wrk_map_index); |
| if (!app_wrk) |
| return; |
| |
| mq_send_unlisten_reply (app_wrk, sh, mp->context, rv); |
| } |
| |
| static void |
| session_mq_accepted_reply_handler (session_worker_t *wrk, |
| session_evt_elt_t *elt) |
| { |
| vnet_disconnect_args_t _a = { 0 }, *a = &_a; |
| session_accepted_reply_msg_t *mp; |
| session_state_t old_state; |
| app_worker_t *app_wrk; |
| session_t *s; |
| |
| mp = session_evt_ctrl_data (wrk, elt); |
| |
| /* Mail this back from the main thread. We're not polling in main |
| * thread so we're using other workers for notifications. */ |
| if (session_thread_from_handle (mp->handle) == 0 && vlib_num_workers () && |
| vlib_get_thread_index () != 0) |
| { |
| session_wrk_send_evt_to_main (wrk, elt); |
| return; |
| } |
| |
| s = session_get_from_handle_if_valid (mp->handle); |
| if (!s) |
| return; |
| |
| app_wrk = app_worker_get (s->app_wrk_index); |
| if (app_wrk->app_index != mp->context) |
| { |
| clib_warning ("app doesn't own session"); |
| return; |
| } |
| |
| /* Server isn't interested, disconnect the session */ |
| if (mp->retval) |
| { |
| a->app_index = mp->context; |
| a->handle = mp->handle; |
| vnet_disconnect_session (a); |
| return; |
| } |
| |
| /* Special handling for cut-through sessions */ |
| if (!session_has_transport (s)) |
| { |
| session_set_state (s, SESSION_STATE_READY); |
| ct_session_connect_notify (s, SESSION_E_NONE); |
| return; |
| } |
| |
| old_state = s->session_state; |
| session_set_state (s, SESSION_STATE_READY); |
| |
| if (!svm_fifo_is_empty_prod (s->rx_fifo)) |
| app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX); |
| |
| /* Closed while waiting for app to reply. Resend disconnect */ |
| if (old_state >= SESSION_STATE_TRANSPORT_CLOSING) |
| { |
| app_worker_close_notify (app_wrk, s); |
| session_set_state (s, old_state); |
| return; |
| } |
| } |
| |
| static void |
| session_mq_reset_reply_handler (void *data) |
| { |
| vnet_disconnect_args_t _a = { 0 }, *a = &_a; |
| session_reset_reply_msg_t *mp; |
| app_worker_t *app_wrk; |
| session_t *s; |
| application_t *app; |
| u32 index, thread_index; |
| |
| mp = (session_reset_reply_msg_t *) data; |
| app = application_lookup (mp->context); |
| if (!app) |
| return; |
| |
| session_parse_handle (mp->handle, &index, &thread_index); |
| s = session_get_if_valid (index, thread_index); |
| |
| /* No session or not the right session */ |
| if (!s || s->session_state < SESSION_STATE_TRANSPORT_CLOSING) |
| return; |
| |
| app_wrk = app_worker_get (s->app_wrk_index); |
| if (!app_wrk || app_wrk->app_index != app->app_index) |
| { |
| clib_warning ("App %u does not own handle 0x%lx!", app->app_index, |
| mp->handle); |
| return; |
| } |
| |
| /* Client objected to resetting the session, log and continue */ |
| if (mp->retval) |
| { |
| clib_warning ("client retval %d", mp->retval); |
| return; |
| } |
| |
| /* This comes as a response to a reset, transport only waiting for |
| * confirmation to remove connection state, no need to disconnect */ |
| a->handle = mp->handle; |
| a->app_index = app->app_index; |
| vnet_disconnect_session (a); |
| } |
| |
| static void |
| session_mq_disconnected_handler (void *data) |
| { |
| session_disconnected_reply_msg_t *rmp; |
| vnet_disconnect_args_t _a, *a = &_a; |
| svm_msg_q_msg_t _msg, *msg = &_msg; |
| session_disconnected_msg_t *mp; |
| app_worker_t *app_wrk; |
| session_event_t *evt; |
| session_t *s; |
| application_t *app; |
| int rv = 0; |
| |
| mp = (session_disconnected_msg_t *) data; |
| if (!(s = session_get_from_handle_if_valid (mp->handle))) |
| { |
| clib_warning ("could not disconnect handle %llu", mp->handle); |
| return; |
| } |
| app_wrk = app_worker_get (s->app_wrk_index); |
| app = application_lookup (mp->client_index); |
| if (!(app_wrk && app && app->app_index == app_wrk->app_index)) |
| { |
| clib_warning ("could not disconnect session: %llu app: %u", |
| mp->handle, mp->client_index); |
| return; |
| } |
| |
| a->handle = mp->handle; |
| a->app_index = app_wrk->wrk_index; |
| rv = vnet_disconnect_session (a); |
| |
| svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue, |
| SESSION_MQ_CTRL_EVT_RING, |
| SVM_Q_WAIT, msg); |
| evt = svm_msg_q_msg_data (app_wrk->event_queue, msg); |
| clib_memset (evt, 0, sizeof (*evt)); |
| evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY; |
| rmp = (session_disconnected_reply_msg_t *) evt->data; |
| rmp->handle = mp->handle; |
| rmp->context = mp->context; |
| rmp->retval = rv; |
| svm_msg_q_add_and_unlock (app_wrk->event_queue, msg); |
| } |
| |
| static void |
| session_mq_disconnected_reply_handler (void *data) |
| { |
| session_disconnected_reply_msg_t *mp; |
| vnet_disconnect_args_t _a, *a = &_a; |
| application_t *app; |
| |
| mp = (session_disconnected_reply_msg_t *) data; |
| |
| /* Client objected to disconnecting the session, log and continue */ |
| if (mp->retval) |
| { |
| clib_warning ("client retval %d", mp->retval); |
| return; |
| } |
| |
| /* Disconnect has been confirmed. Confirm close to transport */ |
| app = application_lookup (mp->context); |
| if (app) |
| { |
| a->handle = mp->handle; |
| a->app_index = app->app_index; |
| vnet_disconnect_session (a); |
| } |
| } |
| |
| static void |
| session_mq_worker_update_handler (void *data) |
| { |
| session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data; |
| session_worker_update_reply_msg_t *rmp; |
| svm_msg_q_msg_t _msg, *msg = &_msg; |
| app_worker_t *app_wrk; |
| u32 owner_app_wrk_map; |
| session_event_t *evt; |
| session_t *s; |
| application_t *app; |
| |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| if (!(s = session_get_from_handle_if_valid (mp->handle))) |
| { |
| clib_warning ("invalid handle %llu", mp->handle); |
| return; |
| } |
| app_wrk = app_worker_get (s->app_wrk_index); |
| if (app_wrk->app_index != app->app_index) |
| { |
| clib_warning ("app %u does not own session %llu", app->app_index, |
| mp->handle); |
| return; |
| } |
| owner_app_wrk_map = app_wrk->wrk_map_index; |
| app_wrk = application_get_worker (app, mp->wrk_index); |
| |
| /* This needs to come from the new owner */ |
| if (mp->req_wrk_index == owner_app_wrk_map) |
| { |
| session_req_worker_update_msg_t *wump; |
| |
| svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue, |
| SESSION_MQ_CTRL_EVT_RING, |
| SVM_Q_WAIT, msg); |
| evt = svm_msg_q_msg_data (app_wrk->event_queue, msg); |
| clib_memset (evt, 0, sizeof (*evt)); |
| evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE; |
| wump = (session_req_worker_update_msg_t *) evt->data; |
| wump->session_handle = mp->handle; |
| svm_msg_q_add_and_unlock (app_wrk->event_queue, msg); |
| return; |
| } |
| |
| app_worker_own_session (app_wrk, s); |
| |
| /* |
| * Send reply |
| */ |
| svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue, |
| SESSION_MQ_CTRL_EVT_RING, |
| SVM_Q_WAIT, msg); |
| evt = svm_msg_q_msg_data (app_wrk->event_queue, msg); |
| clib_memset (evt, 0, sizeof (*evt)); |
| evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY; |
| rmp = (session_worker_update_reply_msg_t *) evt->data; |
| rmp->handle = mp->handle; |
| if (s->rx_fifo) |
| rmp->rx_fifo = fifo_segment_fifo_offset (s->rx_fifo); |
| if (s->tx_fifo) |
| rmp->tx_fifo = fifo_segment_fifo_offset (s->tx_fifo); |
| rmp->segment_handle = session_segment_handle (s); |
| svm_msg_q_add_and_unlock (app_wrk->event_queue, msg); |
| |
| /* |
| * Retransmit messages that may have been lost |
| */ |
| if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo)) |
| session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX); |
| |
| if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo)) |
| app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX); |
| |
| if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING) |
| app_worker_close_notify (app_wrk, s); |
| } |
| |
| static void |
| session_mq_app_wrk_rpc_handler (void *data) |
| { |
| session_app_wrk_rpc_msg_t *mp = (session_app_wrk_rpc_msg_t *) data; |
| svm_msg_q_msg_t _msg, *msg = &_msg; |
| session_app_wrk_rpc_msg_t *rmp; |
| app_worker_t *app_wrk; |
| session_event_t *evt; |
| application_t *app; |
| |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| app_wrk = application_get_worker (app, mp->wrk_index); |
| |
| svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue, |
| SESSION_MQ_CTRL_EVT_RING, SVM_Q_WAIT, |
| msg); |
| evt = svm_msg_q_msg_data (app_wrk->event_queue, msg); |
| clib_memset (evt, 0, sizeof (*evt)); |
| evt->event_type = SESSION_CTRL_EVT_APP_WRK_RPC; |
| rmp = (session_app_wrk_rpc_msg_t *) evt->data; |
| clib_memcpy (rmp->data, mp->data, sizeof (mp->data)); |
| svm_msg_q_add_and_unlock (app_wrk->event_queue, msg); |
| } |
| |
| static void |
| session_mq_transport_attr_handler (void *data) |
| { |
| session_transport_attr_msg_t *mp = (session_transport_attr_msg_t *) data; |
| session_transport_attr_reply_msg_t *rmp; |
| svm_msg_q_msg_t _msg, *msg = &_msg; |
| app_worker_t *app_wrk; |
| session_event_t *evt; |
| application_t *app; |
| session_t *s; |
| int rv; |
| |
| app = application_lookup (mp->client_index); |
| if (!app) |
| return; |
| |
| if (!(s = session_get_from_handle_if_valid (mp->handle))) |
| { |
| clib_warning ("invalid handle %llu", mp->handle); |
| return; |
| } |
| app_wrk = app_worker_get (s->app_wrk_index); |
| if (app_wrk->app_index != app->app_index) |
| { |
| clib_warning ("app %u does not own session %llu", app->app_index, |
| mp->handle); |
| return; |
| } |
| |
| rv = session_transport_attribute (s, mp->is_get, &mp->attr); |
| |
| svm_msg_q_lock_and_alloc_msg_w_ring ( |
| app_wrk->event_queue, SESSION_MQ_CTRL_EVT_RING, SVM_Q_WAIT, msg); |
| evt = svm_msg_q_msg_data (app_wrk->event_queue, msg); |
| clib_memset (evt, 0, sizeof (*evt)); |
| evt->event_type = SESSION_CTRL_EVT_TRANSPORT_ATTR_REPLY; |
| rmp = (session_transport_attr_reply_msg_t *) evt->data; |
| rmp->handle = mp->handle; |
| rmp->retval = rv; |
| rmp->is_get = mp->is_get; |
| if (!rv && mp->is_get) |
| rmp->attr = mp->attr; |
| svm_msg_q_add_and_unlock (app_wrk->event_queue, msg); |
| } |
| |
| void |
| session_wrk_handle_evts_main_rpc (void *args) |
| { |
| vlib_main_t *vm = vlib_get_main (); |
| clib_llist_index_t ei, next_ei; |
| session_evt_elt_t *he, *elt; |
| session_worker_t *fwrk; |
| u32 thread_index; |
| |
| vlib_worker_thread_barrier_sync (vm); |
| |
| thread_index = pointer_to_uword (args); |
| fwrk = session_main_get_worker (thread_index); |
| |
| he = clib_llist_elt (fwrk->event_elts, fwrk->evts_pending_main); |
| ei = clib_llist_next_index (he, evt_list); |
| |
| while (ei != fwrk->evts_pending_main) |
| { |
| elt = clib_llist_elt (fwrk->event_elts, ei); |
| next_ei = clib_llist_next_index (elt, evt_list); |
| clib_llist_remove (fwrk->event_elts, evt_list, elt); |
| switch (elt->evt.event_type) |
| { |
| case SESSION_CTRL_EVT_LISTEN: |
| session_mq_listen_handler (fwrk, elt); |
| break; |
| case SESSION_CTRL_EVT_UNLISTEN: |
| session_mq_unlisten_handler (fwrk, elt); |
| break; |
| case SESSION_CTRL_EVT_APP_DETACH: |
| app_mq_detach_handler (fwrk, elt); |
| break; |
| case SESSION_CTRL_EVT_CONNECT_URI: |
| session_mq_connect_uri_handler (fwrk, elt); |
| break; |
| case SESSION_CTRL_EVT_ACCEPTED_REPLY: |
| session_mq_accepted_reply_handler (fwrk, elt); |
| break; |
| case SESSION_CTRL_EVT_CONNECT: |
| session_mq_connect_handler (fwrk, elt); |
| break; |
| default: |
| clib_warning ("unhandled %u", elt->evt.event_type); |
| ALWAYS_ASSERT (0); |
| break; |
| } |
| |
| /* Regrab element in case pool moved */ |
| elt = clib_llist_elt (fwrk->event_elts, ei); |
| if (!clib_llist_elt_is_linked (elt, evt_list)) |
| { |
| session_evt_ctrl_data_free (fwrk, elt); |
| clib_llist_put (fwrk->event_elts, elt); |
| } |
| ei = next_ei; |
| } |
| |
| vlib_worker_thread_barrier_release (vm); |
| } |
| |
| vlib_node_registration_t session_queue_node; |
| |
| typedef struct |
| { |
| u32 session_index; |
| u32 server_thread_index; |
| } session_queue_trace_t; |
| |
| /* packet trace format function */ |
| static u8 * |
| format_session_queue_trace (u8 * s, va_list * args) |
| { |
| CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); |
| CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); |
| session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *); |
| |
| s = format (s, "session index %d thread index %d", |
| t->session_index, t->server_thread_index); |
| return s; |
| } |
| |
| #define foreach_session_queue_error \ |
| _ (TX, tx, INFO, "Packets transmitted") \ |
| _ (TIMER, timer, INFO, "Timer events") \ |
| _ (NO_BUFFER, no_buffer, ERROR, "Out of buffers") |
| |
| typedef enum |
| { |
| #define _(f, n, s, d) SESSION_QUEUE_ERROR_##f, |
| foreach_session_queue_error |
| #undef _ |
| SESSION_QUEUE_N_ERROR, |
| } session_queue_error_t; |
| |
| static vlib_error_desc_t session_error_counters[] = { |
| #define _(f, n, s, d) { #n, d, VL_COUNTER_SEVERITY_##s }, |
| foreach_session_queue_error |
| #undef _ |
| }; |
| |
| enum |
| { |
| SESSION_TX_NO_BUFFERS = -2, |
| SESSION_TX_NO_DATA, |
| SESSION_TX_OK |
| }; |
| |
| static void |
| session_tx_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node, |
| u32 next_index, vlib_buffer_t **bufs, u16 n_segs, |
| session_t *s, u32 n_trace) |
| { |
| vlib_buffer_t **b = bufs; |
| |
| while (n_trace && n_segs) |
| { |
| if (PREDICT_TRUE (vlib_trace_buffer (vm, node, next_index, b[0], |
| 1 /* follow_chain */))) |
| { |
| session_queue_trace_t *t = |
| vlib_add_trace (vm, node, b[0], sizeof (*t)); |
| t->session_index = s->session_index; |
| t->server_thread_index = s->thread_index; |
| n_trace--; |
| } |
| b++; |
| n_segs--; |
| } |
| vlib_set_trace_count (vm, node, n_trace); |
| } |
| |
| always_inline int |
| session_tx_fill_dma_transfers (session_worker_t *wrk, |
| session_tx_context_t *ctx, vlib_buffer_t *b) |
| { |
| vlib_main_t *vm = wrk->vm; |
| u32 len_to_deq; |
| u8 *data0 = NULL; |
| int n_bytes_read, len_write; |
| svm_fifo_seg_t data_fs[2]; |
| |
| u32 n_segs = 2; |
| u16 n_transfers = 0; |
| /* |
| * Start with the first buffer in chain |
| */ |
| b->error = 0; |
| b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED; |
| b->current_data = 0; |
| data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN); |
| len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf); |
| |
| n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset, |
| data_fs, &n_segs, len_to_deq); |
| |
| len_write = n_bytes_read; |
| ASSERT (n_bytes_read == len_to_deq); |
| |
| while (n_bytes_read) |
| { |
| wrk->batch_num++; |
| vlib_dma_batch_add (vm, wrk->batch, data0, data_fs[n_transfers].data, |
| data_fs[n_transfers].len); |
| data0 += data_fs[n_transfers].len; |
| n_bytes_read -= data_fs[n_transfers].len; |
| n_transfers++; |
| } |
| return len_write; |
| } |
| |
| always_inline int |
| session_tx_fill_dma_transfers_tail (session_worker_t *wrk, |
| session_tx_context_t *ctx, |
| vlib_buffer_t *b, u32 len_to_deq, u8 *data) |
| { |
| vlib_main_t *vm = wrk->vm; |
| int n_bytes_read, len_write; |
| svm_fifo_seg_t data_fs[2]; |
| u32 n_segs = 2; |
| u16 n_transfers = 0; |
| |
| n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset, |
| data_fs, &n_segs, len_to_deq); |
| |
| len_write = n_bytes_read; |
| |
| ASSERT (n_bytes_read == len_to_deq); |
| |
| while (n_bytes_read) |
| { |
| wrk->batch_num++; |
| vlib_dma_batch_add (vm, wrk->batch, data, data_fs[n_transfers].data, |
| data_fs[n_transfers].len); |
| data += data_fs[n_transfers].len; |
| n_bytes_read -= data_fs[n_transfers].len; |
| n_transfers++; |
| } |
| |
| return len_write; |
| } |
| |
| always_inline int |
| session_tx_copy_data (session_worker_t *wrk, session_tx_context_t *ctx, |
| vlib_buffer_t *b, u32 len_to_deq, u8 *data0) |
| { |
| int n_bytes_read; |
| if (PREDICT_TRUE (!wrk->dma_enabled)) |
| n_bytes_read = |
| svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data0); |
| else |
| n_bytes_read = session_tx_fill_dma_transfers (wrk, ctx, b); |
| return n_bytes_read; |
| } |
| |
| always_inline int |
| session_tx_copy_data_tail (session_worker_t *wrk, session_tx_context_t *ctx, |
| vlib_buffer_t *b, u32 len_to_deq, u8 *data) |
| { |
| int n_bytes_read; |
| if (PREDICT_TRUE (!wrk->dma_enabled)) |
| n_bytes_read = |
| svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data); |
| else |
| n_bytes_read = |
| session_tx_fill_dma_transfers_tail (wrk, ctx, b, len_to_deq, data); |
| return n_bytes_read; |
| } |
| |
| always_inline void |
| session_tx_fifo_chain_tail (session_worker_t *wrk, session_tx_context_t *ctx, |
| vlib_buffer_t *b, u16 *n_bufs, u8 peek_data) |
| { |
| vlib_main_t *vm = wrk->vm; |
| vlib_buffer_t *chain_b, *prev_b; |
| u32 chain_bi0, to_deq, left_from_seg; |
| int len_to_deq, n_bytes_read; |
| u8 *data, j; |
| |
| b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID; |
| b->total_length_not_including_first_buffer = 0; |
| |
| chain_b = b; |
| left_from_seg = clib_min (ctx->sp.snd_mss - b->current_length, |
| ctx->left_to_snd); |
| to_deq = left_from_seg; |
| for (j = 1; j < ctx->n_bufs_per_seg; j++) |
| { |
| prev_b = chain_b; |
| len_to_deq = clib_min (to_deq, ctx->deq_per_buf); |
| |
| *n_bufs -= 1; |
| chain_bi0 = ctx->tx_buffers[*n_bufs]; |
| chain_b = vlib_get_buffer (vm, chain_bi0); |
| chain_b->current_data = 0; |
| data = vlib_buffer_get_current (chain_b); |
| if (peek_data) |
| { |
| n_bytes_read = |
| session_tx_copy_data_tail (wrk, ctx, b, len_to_deq, data); |
| ctx->sp.tx_offset += n_bytes_read; |
| } |
| else |
| { |
| if (ctx->transport_vft->transport_options.tx_type == |
| TRANSPORT_TX_DGRAM) |
| { |
| svm_fifo_t *f = ctx->s->tx_fifo; |
| session_dgram_hdr_t *hdr = &ctx->hdr; |
| u16 deq_now; |
| u32 offset; |
| |
| deq_now = clib_min (hdr->data_length - hdr->data_offset, |
| len_to_deq); |
| offset = hdr->data_offset + SESSION_CONN_HDR_LEN; |
| n_bytes_read = svm_fifo_peek (f, offset, deq_now, data); |
| ASSERT (n_bytes_read > 0); |
| |
| hdr->data_offset += n_bytes_read; |
| if (hdr->data_offset == hdr->data_length) |
| { |
| offset = hdr->data_length + SESSION_CONN_HDR_LEN; |
| svm_fifo_dequeue_drop (f, offset); |
| if (ctx->left_to_snd > n_bytes_read) |
| svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr), |
| (u8 *) & ctx->hdr); |
| } |
| else if (ctx->left_to_snd == n_bytes_read) |
| svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr, |
| sizeof (session_dgram_pre_hdr_t)); |
| } |
| else |
| n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo, |
| len_to_deq, data); |
| } |
| ASSERT (n_bytes_read == len_to_deq); |
| chain_b->current_length = n_bytes_read; |
| b->total_length_not_including_first_buffer += chain_b->current_length; |
| |
| /* update previous buffer */ |
| prev_b->next_buffer = chain_bi0; |
| prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT; |
| |
| /* update current buffer */ |
| chain_b->next_buffer = 0; |
| |
| to_deq -= n_bytes_read; |
| if (to_deq == 0) |
| break; |
| } |
| ASSERT (to_deq == 0 |
| && b->total_length_not_including_first_buffer == left_from_seg); |
| ctx->left_to_snd -= left_from_seg; |
| } |
| |
| always_inline void |
| session_tx_fill_buffer (session_worker_t *wrk, session_tx_context_t *ctx, |
| vlib_buffer_t *b, u16 *n_bufs, u8 peek_data) |
| { |
| u32 len_to_deq; |
| u8 *data0; |
| int n_bytes_read; |
| /* |
| * Start with the first buffer in chain |
| */ |
| b->error = 0; |
| b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED; |
| b->current_data = 0; |
| |
| data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN); |
| len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf); |
| |
| if (peek_data) |
| { |
| n_bytes_read = session_tx_copy_data (wrk, ctx, b, len_to_deq, data0); |
| ASSERT (n_bytes_read > 0); |
| /* Keep track of progress locally, transport is also supposed to |
| * increment it independently when pushing the header */ |
| ctx->sp.tx_offset += n_bytes_read; |
| } |
| else |
| { |
| if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM) |
| { |
| session_dgram_hdr_t *hdr = &ctx->hdr; |
| svm_fifo_t *f = ctx->s->tx_fifo; |
| u16 deq_now; |
| u32 offset; |
| |
| ASSERT (hdr->data_length > hdr->data_offset); |
| deq_now = clib_min (hdr->data_length - hdr->data_offset, |
| len_to_deq); |
| offset = hdr->data_offset + SESSION_CONN_HDR_LEN; |
| n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0); |
| ASSERT (n_bytes_read > 0); |
| |
| if (transport_connection_is_cless (ctx->tc)) |
| { |
| ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4); |
| ip_copy (&ctx->tc->lcl_ip, &hdr->lcl_ip, ctx->tc->is_ip4); |
| /* Local port assumed to be bound, not overwriting it */ |
| ctx->tc->rmt_port = hdr->rmt_port; |
| } |
| hdr->data_offset += n_bytes_read; |
| if (hdr->data_offset == hdr->data_length) |
| { |
| offset = hdr->data_length + SESSION_CONN_HDR_LEN; |
| svm_fifo_dequeue_drop (f, offset); |
| if (ctx->left_to_snd > n_bytes_read) |
| svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr), |
| (u8 *) & ctx->hdr); |
| } |
| else if (ctx->left_to_snd == n_bytes_read) |
| svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr, |
| sizeof (session_dgram_pre_hdr_t)); |
| } |
| else |
| { |
| n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo, |
| len_to_deq, data0); |
| ASSERT (n_bytes_read > 0); |
| } |
| } |
| |
| b->current_length = n_bytes_read; |
| ctx->left_to_snd -= n_bytes_read; |
| |
| /* |
| * Fill in the remaining buffers in the chain, if any |
| */ |
| if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd)) |
| session_tx_fifo_chain_tail (wrk, ctx, b, n_bufs, peek_data); |
| } |
| |
| always_inline u8 |
| session_tx_not_ready (session_t * s, u8 peek_data) |
| { |
| if (peek_data) |
| { |
| if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY)) |
| return 0; |
| /* Can retransmit for closed sessions but can't send new data if |
| * session is not ready or closed */ |
| else if (s->session_state < SESSION_STATE_READY) |
| { |
| /* Allow accepting session to send custom packets. |
| * For instance, tcp want to send acks in established, but |
| * the app has not called accept() yet */ |
| if (s->session_state == SESSION_STATE_ACCEPTING && |
| (s->flags & SESSION_F_CUSTOM_TX)) |
| return 0; |
| return 1; |
| } |
| else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED) |
| { |
| /* Allow closed transports to still send custom packets. |
| * For instance, tcp may want to send acks in time-wait. */ |
| if (s->session_state != SESSION_STATE_TRANSPORT_DELETED |
| && (s->flags & SESSION_F_CUSTOM_TX)) |
| return 0; |
| return 2; |
| } |
| } |
| else |
| { |
| if (s->session_state == SESSION_STATE_TRANSPORT_DELETED) |
| return 2; |
| } |
| return 0; |
| } |
| |
| always_inline transport_connection_t * |
| session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data) |
| { |
| if (peek_data) |
| { |
| return ctx->transport_vft->get_connection (ctx->s->connection_index, |
| ctx->s->thread_index); |
| } |
| else |
| { |
| if (ctx->s->session_state == SESSION_STATE_LISTENING) |
| return ctx->transport_vft->get_listener (ctx->s->connection_index); |
| else |
| { |
| return ctx->transport_vft->get_connection (ctx->s->connection_index, |
| ctx->s->thread_index); |
| } |
| } |
| } |
| |
| always_inline void |
| session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx, |
| u32 max_segs, u8 peek_data) |
| { |
| u32 n_bytes_per_buf, n_bytes_per_seg; |
| |
| n_bytes_per_buf = vlib_buffer_get_default_data_size (vm); |
| ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo); |
| |
| if (peek_data) |
| { |
| /* Offset in rx fifo from where to peek data */ |
| if (PREDICT_FALSE (ctx->sp.tx_offset >= ctx->max_dequeue)) |
| { |
| ctx->max_len_to_snd = 0; |
| return; |
| } |
| ctx->max_dequeue -= ctx->sp.tx_offset; |
| } |
| else |
| { |
| if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM) |
| { |
| u32 len, chain_limit; |
| |
| if (ctx->max_dequeue <= sizeof (ctx->hdr)) |
| { |
| ctx->max_len_to_snd = 0; |
| return; |
| } |
| |
| svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr), |
| (u8 *) & ctx->hdr); |
| /* Zero length dgrams not supported */ |
| if (PREDICT_FALSE (ctx->hdr.data_length == 0)) |
| { |
| svm_fifo_dequeue_drop (ctx->s->tx_fifo, sizeof (ctx->hdr)); |
| ctx->max_len_to_snd = 0; |
| return; |
| } |
| ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset); |
| len = ctx->hdr.data_length - ctx->hdr.data_offset; |
| |
| if (ctx->hdr.gso_size) |
| { |
| ctx->sp.snd_mss = clib_min (ctx->sp.snd_mss, ctx->hdr.gso_size); |
| } |
| |
| /* Process multiple dgrams if smaller than min (buf_space, mss). |
| * This avoids handling multiple dgrams if they require buffer |
| * chains */ |
| chain_limit = clib_min (n_bytes_per_buf - TRANSPORT_MAX_HDRS_LEN, |
| ctx->sp.snd_mss); |
| if (ctx->hdr.data_length <= chain_limit) |
| { |
| u32 first_dgram_len, dgram_len, offset, max_offset; |
| session_dgram_hdr_t hdr; |
| |
| ctx->sp.snd_mss = clib_min (ctx->sp.snd_mss, len); |
| offset = ctx->hdr.data_length + sizeof (session_dgram_hdr_t); |
| first_dgram_len = len; |
| max_offset = clib_min (ctx->max_dequeue, 16 << 10); |
| |
| while (offset < max_offset) |
| { |
| svm_fifo_peek (ctx->s->tx_fifo, offset, sizeof (ctx->hdr), |
| (u8 *) & hdr); |
| dgram_len = hdr.data_length - hdr.data_offset; |
| if (offset + sizeof (hdr) + hdr.data_length > |
| ctx->max_dequeue || |
| first_dgram_len != dgram_len) |
| break; |
| /* Assert here to allow test above with zero length dgrams */ |
| ASSERT (hdr.data_length > hdr.data_offset); |
| len += dgram_len; |
| offset += sizeof (hdr) + hdr.data_length; |
| } |
| } |
| |
| ctx->max_dequeue = len; |
| } |
| } |
| ASSERT (ctx->max_dequeue > 0); |
| |
| /* Ensure we're not writing more than transport window allows */ |
| if (ctx->max_dequeue < ctx->sp.snd_space) |
| { |
| /* Constrained by tx queue. Try to send only fully formed segments */ |
| ctx->max_len_to_snd = (ctx->max_dequeue > ctx->sp.snd_mss) ? |
| (ctx->max_dequeue - (ctx->max_dequeue % ctx->sp.snd_mss)) : |
| ctx->max_dequeue; |
| /* TODO Nagle ? */ |
| } |
| else |
| { |
| /* Expectation is that snd_space0 is already a multiple of snd_mss */ |
| ctx->max_len_to_snd = ctx->sp.snd_space; |
| } |
| |
| /* Check if we're tx constrained by the node */ |
| ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->sp.snd_mss); |
| if (ctx->n_segs_per_evt > max_segs) |
| { |
| ctx->n_segs_per_evt = max_segs; |
| ctx->max_len_to_snd = max_segs * ctx->sp.snd_mss; |
| } |
| |
| ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN); |
| if (ctx->n_segs_per_evt > 1) |
| { |
| u32 n_bytes_last_seg, n_bufs_last_seg; |
| |
| n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->sp.snd_mss; |
| n_bytes_last_seg = TRANSPORT_MAX_HDRS_LEN + ctx->max_len_to_snd |
| - ((ctx->n_segs_per_evt - 1) * ctx->sp.snd_mss); |
| ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf); |
| n_bufs_last_seg = ceil ((f64) n_bytes_last_seg / n_bytes_per_buf); |
| ctx->n_bufs_needed = ((ctx->n_segs_per_evt - 1) * ctx->n_bufs_per_seg) |
| + n_bufs_last_seg; |
| } |
| else |
| { |
| n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->max_len_to_snd; |
| ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf); |
| ctx->n_bufs_needed = ctx->n_bufs_per_seg; |
| } |
| |
| ctx->deq_per_buf = clib_min (ctx->sp.snd_mss, n_bytes_per_buf); |
| ctx->deq_per_first_buf = clib_min (ctx->sp.snd_mss, |
| n_bytes_per_buf - |
| TRANSPORT_MAX_HDRS_LEN); |
| } |
| |
| always_inline void |
| session_tx_maybe_reschedule (session_worker_t * wrk, |
| session_tx_context_t * ctx, |
| session_evt_elt_t * elt) |
| { |
| session_t *s = ctx->s; |
| |
| svm_fifo_unset_event (s->tx_fifo); |
| if (svm_fifo_max_dequeue_cons (s->tx_fifo) > ctx->sp.tx_offset) |
| { |
| if (svm_fifo_set_event (s->tx_fifo)) |
| session_evt_add_head_old (wrk, elt); |
| } |
| else |
| { |
| transport_connection_deschedule (ctx->tc); |
| } |
| } |
| |
| always_inline void |
| session_tx_add_pending_buffer (session_worker_t *wrk, u32 bi, u32 next_index) |
| { |
| if (PREDICT_TRUE (!wrk->dma_enabled)) |
| { |
| vec_add1 (wrk->pending_tx_buffers, bi); |
| vec_add1 (wrk->pending_tx_nexts, next_index); |
| } |
| else |
| { |
| session_dma_transfer *dma_transfer = &wrk->dma_trans[wrk->trans_tail]; |
| vec_add1 (dma_transfer->pending_tx_buffers, bi); |
| vec_add1 (dma_transfer->pending_tx_nexts, next_index); |
| } |
| } |
| |
| always_inline int |
| session_tx_fifo_read_and_snd_i (session_worker_t * wrk, |
| vlib_node_runtime_t * node, |
| session_evt_elt_t * elt, |
| int *n_tx_packets, u8 peek_data) |
| { |
| u32 n_trace, n_left, pbi, next_index, max_burst; |
| session_tx_context_t *ctx = &wrk->ctx; |
| session_main_t *smm = &session_main; |
| session_event_t *e = &elt->evt; |
| vlib_main_t *vm = wrk->vm; |
| transport_proto_t tp; |
| vlib_buffer_t *pb; |
| u16 n_bufs, rv; |
| |
| if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data)))) |
| { |
| if (rv < 2) |
| session_evt_add_old (wrk, elt); |
| return SESSION_TX_NO_DATA; |
| } |
| |
| next_index = smm->session_type_to_next[ctx->s->session_type]; |
| max_burst = SESSION_NODE_FRAME_SIZE - *n_tx_packets; |
| |
| tp = session_get_transport_proto (ctx->s); |
| ctx->transport_vft = transport_protocol_get_vft (tp); |
| ctx->tc = session_tx_get_transport (ctx, peek_data); |
| |
| if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH)) |
| { |
| if (ctx->transport_vft->flush_data) |
| ctx->transport_vft->flush_data (ctx->tc); |
| e->event_type = SESSION_IO_EVT_TX; |
| } |
| |
| if (ctx->s->flags & SESSION_F_CUSTOM_TX) |
| { |
| u32 n_custom_tx; |
| ctx->s->flags &= ~SESSION_F_CUSTOM_TX; |
| ctx->sp.max_burst_size = max_burst; |
| n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, &ctx->sp); |
| *n_tx_packets += n_custom_tx; |
| if (PREDICT_FALSE |
| (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)) |
| return SESSION_TX_OK; |
| max_burst -= n_custom_tx; |
| if (!max_burst || (ctx->s->flags & SESSION_F_CUSTOM_TX)) |
| { |
| session_evt_add_old (wrk, elt); |
| return SESSION_TX_OK; |
| } |
| } |
| |
| /* Connection previously descheduled because it had no data to send. |
| * Clear descheduled flag and reset pacer if in use */ |
| if (transport_connection_is_descheduled (ctx->tc)) |
| transport_connection_clear_descheduled (ctx->tc); |
| |
| transport_connection_snd_params (ctx->tc, &ctx->sp); |
| |
| if (!ctx->sp.snd_space) |
| { |
| /* If the deschedule flag was set, remove session from scheduler. |
| * Transport is responsible for rescheduling this session. */ |
| if (ctx->sp.flags & TRANSPORT_SND_F_DESCHED) |
| transport_connection_deschedule (ctx->tc); |
| /* Request to postpone the session, e.g., zero-wnd and transport |
| * is not currently probing */ |
| else if (ctx->sp.flags & TRANSPORT_SND_F_POSTPONE) |
| session_evt_add_old (wrk, elt); |
| /* This flow queue is "empty" so it should be re-evaluated before |
| * the ones that have data to send. */ |
| else |
| session_evt_add_head_old (wrk, elt); |
| |
| return SESSION_TX_NO_DATA; |
| } |
| |
| if (transport_connection_is_tx_paced (ctx->tc)) |
| { |
| u32 snd_space = transport_connection_tx_pacer_burst (ctx->tc); |
| if (snd_space < TRANSPORT_PACER_MIN_BURST) |
| { |
| session_evt_add_head_old (wrk, elt); |
| return SESSION_TX_NO_DATA; |
| } |
| snd_space = clib_min (ctx->sp.snd_space, snd_space); |
| ctx->sp.snd_space = snd_space >= ctx->sp.snd_mss ? |
| snd_space - snd_space % ctx->sp.snd_mss : snd_space; |
| } |
| |
| /* Check how much we can pull. */ |
| session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data); |
| |
| if (PREDICT_FALSE (!ctx->max_len_to_snd)) |
| { |
| transport_connection_tx_pacer_reset_bucket (ctx->tc, 0); |
| session_tx_maybe_reschedule (wrk, ctx, elt); |
| return SESSION_TX_NO_DATA; |
| } |
| |
| vec_validate_aligned (ctx->tx_buffers, ctx->n_bufs_needed - 1, |
| CLIB_CACHE_LINE_BYTES); |
| n_bufs = vlib_buffer_alloc (vm, ctx->tx_buffers, ctx->n_bufs_needed); |
| if (PREDICT_FALSE (n_bufs < ctx->n_bufs_needed)) |
| { |
| if (n_bufs) |
| vlib_buffer_free (vm, ctx->tx_buffers, n_bufs); |
| session_evt_add_head_old (wrk, elt); |
| vlib_node_increment_counter (wrk->vm, node->node_index, |
| SESSION_QUEUE_ERROR_NO_BUFFER, 1); |
| return SESSION_TX_NO_BUFFERS; |
| } |
| |
| if (transport_connection_is_tx_paced (ctx->tc)) |
| transport_connection_tx_pacer_update_bytes (ctx->tc, ctx->max_len_to_snd); |
| |
| ctx->left_to_snd = ctx->max_len_to_snd; |
| n_left = ctx->n_segs_per_evt; |
| |
| vec_validate (ctx->transport_pending_bufs, n_left); |
| |
| while (n_left >= 4) |
| { |
| vlib_buffer_t *b0, *b1; |
| u32 bi0, bi1; |
| |
| pbi = ctx->tx_buffers[n_bufs - 3]; |
| pb = vlib_get_buffer (vm, pbi); |
| vlib_prefetch_buffer_header (pb, STORE); |
| pbi = ctx->tx_buffers[n_bufs - 4]; |
| pb = vlib_get_buffer (vm, pbi); |
| vlib_prefetch_buffer_header (pb, STORE); |
| |
| bi0 = ctx->tx_buffers[--n_bufs]; |
| bi1 = ctx->tx_buffers[--n_bufs]; |
| |
| b0 = vlib_get_buffer (vm, bi0); |
| b1 = vlib_get_buffer (vm, bi1); |
| |
| session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data); |
| session_tx_fill_buffer (wrk, ctx, b1, &n_bufs, peek_data); |
| |
| ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0; |
| ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left + 1] = b1; |
| n_left -= 2; |
| |
| session_tx_add_pending_buffer (wrk, bi0, next_index); |
| session_tx_add_pending_buffer (wrk, bi1, next_index); |
| } |
| while (n_left) |
| { |
| vlib_buffer_t *b0; |
| u32 bi0; |
| |
| if (n_left > 1) |
| { |
| pbi = ctx->tx_buffers[n_bufs - 2]; |
| pb = vlib_get_buffer (vm, pbi); |
| vlib_prefetch_buffer_header (pb, STORE); |
| } |
| |
| bi0 = ctx->tx_buffers[--n_bufs]; |
| b0 = vlib_get_buffer (vm, bi0); |
| session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data); |
| |
| ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0; |
| n_left -= 1; |
| |
| session_tx_add_pending_buffer (wrk, bi0, next_index); |
| } |
| |
| /* Ask transport to push headers */ |
| ctx->transport_vft->push_header (ctx->tc, ctx->transport_pending_bufs, |
| ctx->n_segs_per_evt); |
| |
| if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0)) |
| session_tx_trace_frame (vm, node, next_index, ctx->transport_pending_bufs, |
| ctx->n_segs_per_evt, ctx->s, n_trace); |
| |
| if (PREDICT_FALSE (n_bufs)) |
| vlib_buffer_free (vm, ctx->tx_buffers, n_bufs); |
| |
| *n_tx_packets += ctx->n_segs_per_evt; |
| |
| SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue, |
| ctx->s->tx_fifo->shr->has_event, wrk->last_vlib_time); |
| |
| ASSERT (ctx->left_to_snd == 0); |
| |
| /* If we couldn't dequeue all bytes reschedule as old flow. Otherwise, |
| * check if application enqueued more data and reschedule accordingly */ |
| if (ctx->max_len_to_snd < ctx->max_dequeue) |
| session_evt_add_old (wrk, elt); |
| else |
| session_tx_maybe_reschedule (wrk, ctx, elt); |
| |
| if (!peek_data) |
| { |
| u32 n_dequeued = ctx->max_len_to_snd; |
| if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM) |
| n_dequeued += ctx->n_segs_per_evt * SESSION_CONN_HDR_LEN; |
| if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, n_dequeued)) |
| session_dequeue_notify (ctx->s); |
| } |
| return SESSION_TX_OK; |
| } |
| |
| int |
| session_tx_fifo_peek_and_snd (session_worker_t * wrk, |
| vlib_node_runtime_t * node, |
| session_evt_elt_t * e, int *n_tx_packets) |
| { |
| return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1); |
| } |
| |
| int |
| session_tx_fifo_dequeue_and_snd (session_worker_t * wrk, |
| vlib_node_runtime_t * node, |
| session_evt_elt_t * e, int *n_tx_packets) |
| { |
| return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0); |
| } |
| |
| int |
| session_tx_fifo_dequeue_internal (session_worker_t * wrk, |
| vlib_node_runtime_t * node, |
| session_evt_elt_t * elt, int *n_tx_packets) |
| { |
| transport_send_params_t *sp = &wrk->ctx.sp; |
| session_t *s = wrk->ctx.s; |
| u32 n_packets; |
| |
| if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)) |
| return 0; |
| |
| /* Clear custom-tx flag used to request reschedule for tx */ |
| s->flags &= ~SESSION_F_CUSTOM_TX; |
| |
| sp->flags = 0; |
| sp->bytes_dequeued = 0; |
| sp->max_burst_size = clib_min (SESSION_NODE_FRAME_SIZE - *n_tx_packets, |
| TRANSPORT_PACER_MAX_BURST_PKTS); |
| |
| n_packets = transport_custom_tx (session_get_transport_proto (s), s, sp); |
| *n_tx_packets += n_packets; |
| |
| if (s->flags & SESSION_F_CUSTOM_TX) |
| { |
| session_evt_add_old (wrk, elt); |
| } |
| else if (!(sp->flags & TRANSPORT_SND_F_DESCHED)) |
| { |
| svm_fifo_unset_event (s->tx_fifo); |
| if (svm_fifo_max_dequeue_cons (s->tx_fifo)) |
| if (svm_fifo_set_event (s->tx_fifo)) |
| session_evt_add_head_old (wrk, elt); |
| } |
| |
| if (sp->bytes_dequeued && |
| svm_fifo_needs_deq_ntf (s->tx_fifo, sp->bytes_dequeued)) |
| session_dequeue_notify (s); |
| |
| return n_packets; |
| } |
| |
| always_inline session_t * |
| session_event_get_session (session_worker_t * wrk, session_event_t * e) |
| { |
| if (PREDICT_FALSE (pool_is_free_index (wrk->sessions, e->session_index))) |
| return 0; |
| |
| ASSERT (session_is_valid (e->session_index, wrk->vm->thread_index)); |
| return pool_elt_at_index (wrk->sessions, e->session_index); |
| } |
| |
| always_inline void |
| session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt) |
| { |
| clib_llist_index_t ei; |
| void (*fp) (void *); |
| session_event_t *e; |
| session_t *s; |
| |
| ei = clib_llist_entry_index (wrk->event_elts, elt); |
| e = &elt->evt; |
| |
| switch (e->event_type) |
| { |
| case SESSION_CTRL_EVT_RPC: |
| fp = e->rpc_args.fp; |
| (*fp) (e->rpc_args.arg); |
| break; |
| case SESSION_CTRL_EVT_HALF_CLOSE: |
| s = session_get_from_handle_if_valid (e->session_handle); |
| if (PREDICT_FALSE (!s)) |
| break; |
| session_transport_half_close (s); |
| break; |
| case SESSION_CTRL_EVT_CLOSE: |
| s = session_get_from_handle_if_valid (e->session_handle); |
| if (PREDICT_FALSE (!s)) |
| break; |
| session_transport_close (s); |
| break; |
| case SESSION_CTRL_EVT_RESET: |
| s = session_get_from_handle_if_valid (e->session_handle); |
| if (PREDICT_FALSE (!s)) |
| break; |
| session_transport_reset (s); |
| break; |
| case SESSION_CTRL_EVT_LISTEN: |
| session_mq_listen_handler (wrk, elt); |
| break; |
| case SESSION_CTRL_EVT_LISTEN_URI: |
| session_mq_listen_uri_handler (wrk, elt); |
| break; |
| case SESSION_CTRL_EVT_UNLISTEN: |
| session_mq_unlisten_handler (wrk, elt); |
| break; |
| case SESSION_CTRL_EVT_CONNECT: |
| session_mq_connect_handler (wrk, elt); |
| break; |
| case SESSION_CTRL_EVT_CONNECT_URI: |
| session_mq_connect_uri_handler (wrk, elt); |
| break; |
| case SESSION_CTRL_EVT_SHUTDOWN: |
| session_mq_shutdown_handler (session_evt_ctrl_data (wrk, elt)); |
| break; |
| case SESSION_CTRL_EVT_DISCONNECT: |
| session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt)); |
| break; |
| case SESSION_CTRL_EVT_DISCONNECTED: |
| session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt)); |
| break; |
| case SESSION_CTRL_EVT_ACCEPTED_REPLY: |
| session_mq_accepted_reply_handler (wrk, elt); |
| break; |
| case SESSION_CTRL_EVT_DISCONNECTED_REPLY: |
| session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk, |
| elt)); |
| break; |
| case SESSION_CTRL_EVT_RESET_REPLY: |
| session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt)); |
| break; |
| case SESSION_CTRL_EVT_WORKER_UPDATE: |
| session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt)); |
| break; |
| case SESSION_CTRL_EVT_APP_DETACH: |
| app_mq_detach_handler (wrk, elt); |
| break; |
| case SESSION_CTRL_EVT_APP_WRK_RPC: |
| session_mq_app_wrk_rpc_handler (session_evt_ctrl_data (wrk, elt)); |
| break; |
| case SESSION_CTRL_EVT_TRANSPORT_ATTR: |
| session_mq_transport_attr_handler (session_evt_ctrl_data (wrk, elt)); |
| break; |
| default: |
| clib_warning ("unhandled event type %d", e->event_type); |
| } |
| |
| /* Regrab elements in case pool moved */ |
| elt = clib_llist_elt (wrk->event_elts, ei); |
| if (!clib_llist_elt_is_linked (elt, evt_list)) |
| { |
| e = &elt->evt; |
| if (e->event_type >= SESSION_CTRL_EVT_BOUND) |
| session_evt_ctrl_data_free (wrk, elt); |
| clib_llist_put (wrk->event_elts, elt); |
| } |
| SESSION_EVT (SESSION_EVT_COUNTS, CNT_CTRL_EVTS, 1, wrk); |
| } |
| |
| always_inline void |
| session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node, |
| session_evt_elt_t * elt, int *n_tx_packets) |
| { |
| session_main_t *smm = &session_main; |
| app_worker_t *app_wrk; |
| clib_llist_index_t ei; |
| session_event_t *e; |
| session_t *s; |
| |
| ei = clib_llist_entry_index (wrk->event_elts, elt); |
| e = &elt->evt; |
| |
| switch (e->event_type) |
| { |
| case SESSION_IO_EVT_TX_FLUSH: |
| case SESSION_IO_EVT_TX: |
| s = session_event_get_session (wrk, e); |
| if (PREDICT_FALSE (!s)) |
| break; |
| CLIB_PREFETCH (s->tx_fifo, sizeof (*(s->tx_fifo)), LOAD); |
| wrk->ctx.s = s; |
| /* Spray packets in per session type frames, since they go to |
| * different nodes */ |
| (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets); |
| break; |
| case SESSION_IO_EVT_RX: |
| s = session_event_get_session (wrk, e); |
| if (!s) |
| break; |
| transport_app_rx_evt (session_get_transport_proto (s), |
| s->connection_index, s->thread_index); |
| break; |
| case SESSION_IO_EVT_BUILTIN_RX: |
| s = session_event_get_session (wrk, e); |
| if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING)) |
| break; |
| svm_fifo_unset_event (s->rx_fifo); |
| app_wrk = app_worker_get (s->app_wrk_index); |
| app_worker_builtin_rx (app_wrk, s); |
| break; |
| case SESSION_IO_EVT_TX_MAIN: |
| s = session_get_if_valid (e->session_index, 0 /* main thread */); |
| if (PREDICT_FALSE (!s)) |
| break; |
| wrk->ctx.s = s; |
| if (PREDICT_TRUE (s != 0)) |
| (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets); |
| break; |
| default: |
| clib_warning ("unhandled event type %d", e->event_type); |
| } |
| |
| SESSION_EVT (SESSION_EVT_IO_EVT_COUNTS, e->event_type, 1, wrk); |
| |
| /* Regrab elements in case pool moved */ |
| elt = clib_llist_elt (wrk->event_elts, ei); |
| if (!clib_llist_elt_is_linked (elt, evt_list)) |
| clib_llist_put (wrk->event_elts, elt); |
| } |
| |
| /* *INDENT-OFF* */ |
| static const u32 session_evt_msg_sizes[] = { |
| #define _(symc, sym) \ |
| [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t), |
| foreach_session_ctrl_evt |
| #undef _ |
| }; |
| /* *INDENT-ON* */ |
| |
| always_inline void |
| session_update_time_subscribers (session_main_t *smm, clib_time_type_t now, |
| u32 thread_index) |
| { |
| session_update_time_fn *fn; |
| |
| vec_foreach (fn, smm->update_time_fns) |
| (*fn) (now, thread_index); |
| } |
| |
| always_inline void |
| session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt) |
| { |
| session_evt_elt_t *elt; |
| |
| if (evt->event_type >= SESSION_CTRL_EVT_RPC) |
| { |
| elt = session_evt_alloc_ctrl (wrk); |
| if (evt->event_type >= SESSION_CTRL_EVT_BOUND) |
| { |
| elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk); |
| elt->evt.event_type = evt->event_type; |
| clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data, |
| session_evt_msg_sizes[evt->event_type]); |
| } |
| else |
| { |
| /* Internal control events fit into io events footprint */ |
| clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt)); |
| } |
| } |
| else |
| { |
| elt = session_evt_alloc_new (wrk); |
| clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt)); |
| } |
| } |
| |
| static void |
| session_flush_pending_tx_buffers (session_worker_t * wrk, |
| vlib_node_runtime_t * node) |
| { |
| vlib_buffer_enqueue_to_next_vec (wrk->vm, node, &wrk->pending_tx_buffers, |
| &wrk->pending_tx_nexts, |
| vec_len (wrk->pending_tx_nexts)); |
| vec_reset_length (wrk->pending_tx_buffers); |
| vec_reset_length (wrk->pending_tx_nexts); |
| } |
| |
| int |
| session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq) |
| { |
| svm_msg_q_msg_t _msg, *msg = &_msg; |
| u32 i, n_to_dequeue = 0; |
| session_event_t *evt; |
| |
| n_to_dequeue = svm_msg_q_size (mq); |
| for (i = 0; i < n_to_dequeue; i++) |
| { |
| svm_msg_q_sub_raw (mq, msg); |
| evt = svm_msg_q_msg_data (mq, msg); |
| session_evt_add_to_list (wrk, evt); |
| svm_msg_q_free_msg (mq, msg); |
| } |
| |
| return n_to_dequeue; |
| } |
| |
| static void |
| session_wrk_update_state (session_worker_t *wrk) |
| { |
| vlib_main_t *vm = wrk->vm; |
| |
| if (wrk->state == SESSION_WRK_POLLING) |
| { |
| if (clib_llist_elts (wrk->event_elts) == 4 && |
| vlib_last_vectors_per_main_loop (vm) < 1) |
| { |
| session_wrk_set_state (wrk, SESSION_WRK_INTERRUPT); |
| vlib_node_set_state (vm, session_queue_node.index, |
| VLIB_NODE_STATE_INTERRUPT); |
| } |
| } |
| else if (wrk->state == SESSION_WRK_INTERRUPT) |
| { |
| if (clib_llist_elts (wrk->event_elts) > 4 || |
| vlib_last_vectors_per_main_loop (vm) > 1) |
| { |
| session_wrk_set_state (wrk, SESSION_WRK_POLLING); |
| vlib_node_set_state (vm, session_queue_node.index, |
| VLIB_NODE_STATE_POLLING); |
| } |
| else if (PREDICT_FALSE (!pool_elts (wrk->sessions))) |
| { |
| session_wrk_set_state (wrk, SESSION_WRK_IDLE); |
| } |
| } |
| else |
| { |
| if (clib_llist_elts (wrk->event_elts)) |
| { |
| session_wrk_set_state (wrk, SESSION_WRK_INTERRUPT); |
| } |
| } |
| } |
| |
| static uword |
| session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, |
| vlib_frame_t * frame) |
| { |
| u32 thread_index = vm->thread_index, __clib_unused n_evts; |
| session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he; |
| session_main_t *smm = vnet_get_session_main (); |
| session_worker_t *wrk = &smm->wrk[thread_index]; |
| clib_llist_index_t ei, next_ei, old_ti; |
| int n_tx_packets; |
| |
| SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk); |
| |
| session_wrk_update_time (wrk, vlib_time_now (vm)); |
| |
| /* |
| * Update transport time |
| */ |
| session_update_time_subscribers (smm, wrk->last_vlib_time, thread_index); |
| n_tx_packets = vec_len (wrk->pending_tx_buffers); |
| SESSION_EVT (SESSION_EVT_DSP_CNTRS, UPDATE_TIME, wrk); |
| |
| if (PREDICT_FALSE (wrk->dma_enabled)) |
| { |
| if (wrk->trans_head == ((wrk->trans_tail + 1) & (wrk->trans_size - 1))) |
| return 0; |
| wrk->batch = vlib_dma_batch_new (vm, wrk->config_index); |
| if (!wrk->batch) |
| return 0; |
| } |
| |
| /* |
| * Dequeue new internal mq events |
| */ |
| |
| n_evts = session_wrk_handle_mq (wrk, wrk->vpp_event_queue); |
| SESSION_EVT (SESSION_EVT_DSP_CNTRS, MQ_DEQ, wrk, n_evts); |
| |
| /* |
| * Handle control events |
| */ |
| |
| ei = wrk->ctrl_head; |
| ctrl_he = clib_llist_elt (wrk->event_elts, ei); |
| next_ei = clib_llist_next_index (ctrl_he, evt_list); |
| old_ti = clib_llist_prev_index (ctrl_he, evt_list); |
| while (ei != old_ti) |
| { |
| ei = next_ei; |
| elt = clib_llist_elt (wrk->event_elts, next_ei); |
| next_ei = clib_llist_next_index (elt, evt_list); |
| clib_llist_remove (wrk->event_elts, evt_list, elt); |
| session_event_dispatch_ctrl (wrk, elt); |
| } |
| |
| SESSION_EVT (SESSION_EVT_DSP_CNTRS, CTRL_EVTS, wrk); |
| |
| /* |
| * Handle the new io events. |
| */ |
| |
| new_he = clib_llist_elt (wrk->event_elts, wrk->new_head); |
| old_he = clib_llist_elt (wrk->event_elts, wrk->old_head); |
| old_ti = clib_llist_prev_index (old_he, evt_list); |
| |
| ei = clib_llist_next_index (new_he, evt_list); |
| while (ei != wrk->new_head && n_tx_packets < SESSION_NODE_FRAME_SIZE) |
| { |
| elt = clib_llist_elt (wrk->event_elts, ei); |
| ei = clib_llist_next_index (elt, evt_list); |
| clib_llist_remove (wrk->event_elts, evt_list, elt); |
| session_event_dispatch_io (wrk, node, elt, &n_tx_packets); |
| } |
| |
| SESSION_EVT (SESSION_EVT_DSP_CNTRS, NEW_IO_EVTS, wrk); |
| |
| /* |
| * Handle the old io events, if we had any prior to processing the new ones |
| */ |
| |
| if (old_ti != wrk->old_head) |
| { |
| old_he = clib_llist_elt (wrk->event_elts, wrk->old_head); |
| ei = clib_llist_next_index (old_he, evt_list); |
| |
| while (n_tx_packets < SESSION_NODE_FRAME_SIZE) |
| { |
| elt = clib_llist_elt (wrk->event_elts, ei); |
| next_ei = clib_llist_next_index (elt, evt_list); |
| clib_llist_remove (wrk->event_elts, evt_list, elt); |
| |
| session_event_dispatch_io (wrk, node, elt, &n_tx_packets); |
| |
| if (ei == old_ti) |
| break; |
| |
| ei = next_ei; |
| }; |
| } |
| |
| if (PREDICT_FALSE (wrk->dma_enabled)) |
| { |
| if (wrk->batch_num) |
| { |
| vlib_dma_batch_set_cookie (vm, wrk->batch, wrk->trans_tail); |
| wrk->batch_num = 0; |
| wrk->trans_tail++; |
| if (wrk->trans_tail == wrk->trans_size) |
| wrk->trans_tail = 0; |
| } |
| |
| vlib_dma_batch_submit (vm, wrk->batch); |
| } |
| |
| SESSION_EVT (SESSION_EVT_DSP_CNTRS, OLD_IO_EVTS, wrk); |
| |
| if (vec_len (wrk->pending_tx_buffers)) |
| session_flush_pending_tx_buffers (wrk, node); |
| |
| vlib_node_increment_counter (vm, session_queue_node.index, |
| SESSION_QUEUE_ERROR_TX, n_tx_packets); |
| |
| SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets); |
| |
| if (wrk->flags & SESSION_WRK_F_ADAPTIVE) |
| session_wrk_update_state (wrk); |
| |
| return n_tx_packets; |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (session_queue_node) = { |
| .function = session_queue_node_fn, |
| .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED, |
| .name = "session-queue", |
| .format_trace = format_session_queue_trace, |
| .type = VLIB_NODE_TYPE_INPUT, |
| .n_errors = SESSION_QUEUE_N_ERROR, |
| .error_counters = session_error_counters, |
| .state = VLIB_NODE_STATE_DISABLED, |
| }; |
| /* *INDENT-ON* */ |
| |
| static clib_error_t * |
| session_wrk_tfd_read_ready (clib_file_t *cf) |
| { |
| session_worker_t *wrk = session_main_get_worker (cf->private_data); |
| u64 buf; |
| int rv; |
| |
| vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index); |
| rv = read (wrk->timerfd, &buf, sizeof (buf)); |
| if (rv < 0 && errno != EAGAIN) |
| clib_unix_warning ("failed"); |
| return 0; |
| } |
| |
| static clib_error_t * |
| session_wrk_tfd_write_ready (clib_file_t *cf) |
| { |
| return 0; |
| } |
| |
| void |
| session_wrk_enable_adaptive_mode (session_worker_t *wrk) |
| { |
| u32 thread_index = wrk->vm->thread_index; |
| clib_file_t template = { 0 }; |
| |
| if ((wrk->timerfd = timerfd_create (CLOCK_MONOTONIC, TFD_NONBLOCK)) < 0) |
| clib_warning ("timerfd_create"); |
| |
| template.read_function = session_wrk_tfd_read_ready; |
| template.write_function = session_wrk_tfd_write_ready; |
| template.file_descriptor = wrk->timerfd; |
| template.private_data = thread_index; |
| template.polling_thread_index = thread_index; |
| template.description = format (0, "session-wrk-tfd-%u", thread_index); |
| |
| wrk->timerfd_file = clib_file_add (&file_main, &template); |
| wrk->flags |= SESSION_WRK_F_ADAPTIVE; |
| } |
| |
| static clib_error_t * |
| session_queue_exit (vlib_main_t * vm) |
| { |
| if (vlib_get_n_threads () < 2) |
| return 0; |
| |
| /* |
| * Shut off (especially) worker-thread session nodes. |
| * Otherwise, vpp can crash as the main thread unmaps the |
| * API segment. |
| */ |
| vlib_worker_thread_barrier_sync (vm); |
| session_node_enable_disable (0 /* is_enable */ ); |
| vlib_worker_thread_barrier_release (vm); |
| return 0; |
| } |
| |
| VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit); |
| |
| static uword |
| session_queue_run_on_main (vlib_main_t * vm) |
| { |
| vlib_node_runtime_t *node; |
| |
| node = vlib_node_get_runtime (vm, session_queue_node.index); |
| return session_queue_node_fn (vm, node, 0); |
| } |
| |
| static uword |
| session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt, |
| vlib_frame_t * f) |
| { |
| uword *event_data = 0; |
| f64 timeout = 1.0; |
| uword event_type; |
| |
| while (1) |
| { |
| vlib_process_wait_for_event_or_clock (vm, timeout); |
| event_type = vlib_process_get_events (vm, (uword **) & event_data); |
| |
| switch (event_type) |
| { |
| case SESSION_Q_PROCESS_RUN_ON_MAIN: |
| /* Run session queue node on main thread */ |
| session_queue_run_on_main (vm); |
| break; |
| case SESSION_Q_PROCESS_STOP: |
| vlib_node_set_state (vm, session_queue_process_node.index, |
| VLIB_NODE_STATE_DISABLED); |
| timeout = 100000.0; |
| break; |
| case ~0: |
| /* Timed out. Run on main to ensure all events are handled */ |
| session_queue_run_on_main (vm); |
| break; |
| } |
| vec_reset_length (event_data); |
| } |
| return 0; |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (session_queue_process_node) = |
| { |
| .function = session_queue_process, |
| .type = VLIB_NODE_TYPE_PROCESS, |
| .name = "session-queue-process", |
| .state = VLIB_NODE_STATE_DISABLED, |
| }; |
| /* *INDENT-ON* */ |
| |
| static_always_inline uword |
| session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, |
| vlib_frame_t * frame) |
| { |
| session_main_t *sm = &session_main; |
| if (!sm->wrk[0].vpp_event_queue) |
| return 0; |
| node = vlib_node_get_runtime (vm, session_queue_node.index); |
| return session_queue_node_fn (vm, node, frame); |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE (session_queue_pre_input_node) = |
| { |
| .function = session_queue_pre_input_inline, |
| .type = VLIB_NODE_TYPE_PRE_INPUT, |
| .name = "session-queue-main", |
| .state = VLIB_NODE_STATE_DISABLED, |
| }; |
| /* *INDENT-ON* */ |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |