avf: change promisc mode from the avf process node - vpp

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author	Damjan Marion <damarion@cisco.com>	2020-09-11 14:10:35 +0200
committer	Andrew Yourtchenko <ayourtch@gmail.com>	2020-09-11 13:55:51 +0000
commit	160a2a9a8c5c4e054dcc0e8ebeb3de7654718582 (patch)
tree	c14355a7146815d8616cb11106c1a6f13ec00805 /src/vlibmemory/memory_api.h
parent	8fb4d10dc208fb3f284fe79e838343797cb2d813 (diff)

avf: change promisc mode from the avf process node

Avoid situations where promisc mode is chaged while avf process is suspended in the middle of adminq operation. Type: fix Change-Id: Ia1fc6551e83218b5938630ad3a15d4f3f0ceceff Signed-off-by: Damjan Marion <damarion@cisco.com>

Diffstat (limited to 'src/vlibmemory/memory_api.h')

0 files changed, 0 insertions, 0 deletions

/* * 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. */ /** * @file * @brief Session and session manager */ #include <vnet/plugin/plugin.h> #include <vnet/session/session.h> #include <vnet/session/application.h> #include <vnet/dpo/load_balance.h> #include <vnet/fib/ip4_fib.h> #include <vlib/stats/stats.h> #include <vlib/dma/dma.h> session_main_t session_main; static inline int session_send_evt_to_thread (void *data, void *args, u32 thread_index, session_evt_type_t evt_type) { session_worker_t *wrk = session_main_get_worker (thread_index); session_event_t *evt; svm_msg_q_msg_t msg; svm_msg_q_t *mq; mq = wrk->vpp_event_queue; if (PREDICT_FALSE (svm_msg_q_lock (mq))) return -1; if (PREDICT_FALSE (svm_msg_q_or_ring_is_full (mq, SESSION_MQ_IO_EVT_RING))) { svm_msg_q_unlock (mq); return -2; } switch (evt_type) { case SESSION_CTRL_EVT_RPC: msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING); evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg); evt->rpc_args.fp = data; evt->rpc_args.arg = args; break; case SESSION_IO_EVT_RX: case SESSION_IO_EVT_TX: case SESSION_IO_EVT_TX_FLUSH: case SESSION_IO_EVT_BUILTIN_RX: msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING); evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg); evt->session_index = *(u32 *) data; break; case SESSION_IO_EVT_TX_MAIN: case SESSION_CTRL_EVT_CLOSE: case SESSION_CTRL_EVT_RESET: msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING); evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg); evt->session_handle = session_handle ((session_t *) data); break; default: clib_warning ("evt unhandled!"); svm_msg_q_unlock (mq); return -1; } evt->event_type = evt_type; svm_msg_q_add_and_unlock (mq, &msg); if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT)) vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index); return 0; } int session_send_io_evt_to_thread (svm_fifo_t * f, session_evt_type_t evt_type) { return session_send_evt_to_thread (&f->shr->master_session_index, 0, f->master_thread_index, evt_type); } int session_send_io_evt_to_thread_custom (void *data, u32 thread_index, session_evt_type_t evt_type) { return session_send_evt_to_thread (data, 0, thread_index, evt_type); } int session_send_ctrl_evt_to_thread (session_t * s, session_evt_type_t evt_type) { /* only events supported are disconnect, shutdown and reset */ ASSERT (evt_type == SESSION_CTRL_EVT_CLOSE || evt_type == SESSION_CTRL_EVT_HALF_CLOSE || evt_type == SESSION_CTRL_EVT_RESET); return session_send_evt_to_thread (s, 0, s->thread_index, evt_type); } void session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp, void *rpc_args) { session_send_evt_to_thread (fp, rpc_args, thread_index, SESSION_CTRL_EVT_RPC); } void session_send_rpc_evt_to_thread (u32 thread_index, void *fp, void *rpc_args) { if (thread_index != vlib_get_thread_index ()) session_send_rpc_evt_to_thread_force (thread_index, fp, rpc_args); else { void (*fnp) (void *) = fp; fnp (rpc_args); } } void session_add_self_custom_tx_evt (transport_connection_t * tc, u8 has_prio) { session_t *s = session_get (tc->s_index, tc->thread_index); ASSERT (s->thread_index == vlib_get_thread_index ()); ASSERT (s->session_state != SESSION_STATE_TRANSPORT_DELETED); if (!(s->flags & SESSION_F_CUSTOM_TX)) { s->flags |= SESSION_F_CUSTOM_TX; if (svm_fifo_set_event (s->tx_fifo) || transport_connection_is_descheduled (tc)) { session_evt_elt_t *elt; session_worker_t *wrk; wrk = session_main_get_worker (tc->thread_index); if (has_prio) elt = session_evt_alloc_new (wrk); else elt = session_evt_alloc_old (wrk); elt->evt.session_index = tc->s_index; elt->evt.event_type = SESSION_IO_EVT_TX; tc->flags &= ~TRANSPORT_CONNECTION_F_DESCHED; if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT)) vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index); } } } void sesssion_reschedule_tx (transport_connection_t * tc) { session_worker_t *wrk = session_main_get_worker (tc->thread_index); session_evt_elt_t *elt; ASSERT (tc->thread_index == vlib_get_thread_index ()); elt = session_evt_alloc_new (wrk); elt->evt.session_index = tc->s_index; elt->evt.event_type = SESSION_IO_EVT_TX; if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT)) vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index); } static void session_program_transport_ctrl_evt (session_t * s, session_evt_type_t evt) { u32 thread_index = vlib_get_thread_index (); session_evt_elt_t *elt; session_worker_t *wrk; /* If we are in the handler thread, or being called with the worker barrier * held, just append a new event to pending disconnects vector. */ if (vlib_thread_is_main_w_barrier () || thread_index == s->thread_index) { wrk = session_main_get_worker (s->thread_index); elt = session_evt_alloc_ctrl (wrk); clib_memset (&elt->evt, 0, sizeof (session_event_t)); elt->evt.session_handle = session_handle (s); elt->evt.event_type = evt; if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT)) vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index); } else session_send_ctrl_evt_to_thread (s, evt); } session_t * session_alloc (u32 thread_index) { session_worker_t *wrk = &session_main.wrk[thread_index]; session_t *s; pool_get_aligned_safe (wrk->sessions, s, CLIB_CACHE_LINE_BYTES); clib_memset (s, 0, sizeof (*s)); s->session_index = s - wrk->sessions; s->thread_index = thread_index; s->app_index = APP_INVALID_INDEX; return s; } void session_free (session_t * s) { session_worker_t *wrk = &session_main.wrk[s->thread_index]; SESSION_EVT (SESSION_EVT_FREE, s); if (CLIB_DEBUG) clib_memset (s, 0xFA, sizeof (*s)); pool_put (wrk->sessions, s); } u8 session_is_valid (u32 si, u8 thread_index) { session_t *s; transport_connection_t *tc; s = pool_elt_at_index (session_main.wrk[thread_index].sessions, si); if (s->thread_index != thread_index || s->session_index != si) return 0; if (s->session_state == SESSION_STATE_TRANSPORT_DELETED || s->session_state <= SESSION_STATE_LISTENING) return 1; if ((s->session_state == SESSION_STATE_CONNECTING || s->session_state == SESSION_STATE_TRANSPORT_CLOSED) && (s->flags & SESSION_F_HALF_OPEN)) return 1; tc = session_get_transport (s); if (s->connection_index != tc->c_index || s->thread_index != tc->thread_index || tc->s_index != si) return 0; return 1; } void session_cleanup (session_t *s) { segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo); session_free (s); } static void session_cleanup_notify (session_t * s, session_cleanup_ntf_t ntf) { app_worker_t *app_wrk; app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (!app_wrk) { if (ntf == SESSION_CLEANUP_TRANSPORT) return; session_cleanup (s); return; } app_worker_cleanup_notify (app_wrk, s, ntf); } void session_program_cleanup (session_t *s) { ASSERT (s->session_state == SESSION_STATE_TRANSPORT_DELETED); session_cleanup_notify (s, SESSION_CLEANUP_SESSION); } /** * Cleans up session and lookup table. * * Transport connection must still be valid. */ static void session_delete (session_t * s) { int rv; /* Delete from the main lookup table. */ if ((rv = session_lookup_del_session (s))) clib_warning ("session %u hash delete rv %d", s->session_index, rv); session_program_cleanup (s); } void session_cleanup_half_open (session_handle_t ho_handle) { session_t *ho = session_get_from_handle (ho_handle); /* App transports can migrate their half-opens */ if (ho->flags & SESSION_F_IS_MIGRATING) { /* Session still migrating, move to closed state to signal that the * session should be removed. */ if (ho->connection_index == ~0) { session_set_state (ho, SESSION_STATE_CLOSED); return; } /* Migrated transports are no longer half-opens */ transport_cleanup (session_get_transport_proto (ho), ho->connection_index, ho->app_index /* overloaded */); } else if (ho->session_state != SESSION_STATE_TRANSPORT_DELETED) { /* Cleanup half-open session lookup table if need be */ if (ho->session_state != SESSION_STATE_TRANSPORT_CLOSED) { transport_connection_t *tc; tc = transport_get_half_open (session_get_transport_proto (ho), ho->connection_index); if (tc && !(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP)) session_lookup_del_half_open (tc); } transport_cleanup_half_open (session_get_transport_proto (ho), ho->connection_index); } session_free (ho); } static void session_half_open_free (session_t *ho) { app_worker_t *app_wrk; ASSERT (vlib_get_thread_index () <= transport_cl_thread ()); app_wrk = app_worker_get_if_valid (ho->app_wrk_index); if (app_wrk) app_worker_del_half_open (app_wrk, ho); else session_free (ho); } static void session_half_open_free_rpc (void *args) { session_t *ho = ho_session_get (pointer_to_uword (args)); session_half_open_free (ho); } void session_half_open_delete_notify (transport_connection_t *tc) { session_t *ho = ho_session_get (tc->s_index); /* Cleanup half-open lookup table if need be */ if (ho->session_state != SESSION_STATE_TRANSPORT_CLOSED) { if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP)) session_lookup_del_half_open (tc); } session_set_state (ho, SESSION_STATE_TRANSPORT_DELETED); /* Notification from ctrl thread accepted without rpc */ if (tc->thread_index == transport_cl_thread ()) { session_half_open_free (ho); } else { void *args = uword_to_pointer ((uword) tc->s_index, void *); session_send_rpc_evt_to_thread_force (transport_cl_thread (), session_half_open_free_rpc, args); } } void session_half_open_migrate_notify (transport_connection_t *tc) { session_t *ho; /* Support half-open migrations only for transports with no lookup */ ASSERT (tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP); ho = ho_session_get (tc->s_index); ho->flags |= SESSION_F_IS_MIGRATING; ho->connection_index = ~0; } int session_half_open_migrated_notify (transport_connection_t *tc) { session_t *ho; ho = ho_session_get (tc->s_index); /* App probably detached so the half-open must be cleaned up */ if (ho->session_state == SESSION_STATE_CLOSED) { session_half_open_delete_notify (tc); return -1; } ho->connection_index = tc->c_index; /* Overload app index for half-open with new thread */ ho->app_index = tc->thread_index; return 0; } session_t * session_alloc_for_connection (transport_connection_t * tc) { session_t *s; u32 thread_index = tc->thread_index; ASSERT (thread_index == vlib_get_thread_index () || transport_protocol_is_cl (tc->proto)); s = session_alloc (thread_index); s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4); session_set_state (s, SESSION_STATE_CLOSED); /* Attach transport to session and vice versa */ s->connection_index = tc->c_index; tc->s_index = s->session_index; return s; } session_t * session_alloc_for_half_open (transport_connection_t *tc) { session_t *s; s = ho_session_alloc (); s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4); s->connection_index = tc->c_index; tc->s_index = s->session_index; return s; } /** * Discards bytes from buffer chain * * It discards n_bytes_to_drop starting at first buffer after chain_b */ always_inline void session_enqueue_discard_chain_bytes (vlib_main_t * vm, vlib_buffer_t * b, vlib_buffer_t ** chain_b, u32 n_bytes_to_drop) { vlib_buffer_t *next = *chain_b; u32 to_drop = n_bytes_to_drop; ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT); while (to_drop && (next->flags & VLIB_BUFFER_NEXT_PRESENT)) { next = vlib_get_buffer (vm, next->next_buffer); if (next->current_length > to_drop) { vlib_buffer_advance (next, to_drop); to_drop = 0; } else { to_drop -= next->current_length; next->current_length = 0; } } *chain_b = next; if (to_drop == 0) b->total_length_not_including_first_buffer -= n_bytes_to_drop; } /** * Enqueue buffer chain tail */ always_inline int session_enqueue_chain_tail (session_t * s, vlib_buffer_t * b, u32 offset, u8 is_in_order) { vlib_buffer_t *chain_b; u32 chain_bi, len, diff; vlib_main_t *vm = vlib_get_main (); u8 *data; u32 written = 0; int rv = 0; if (is_in_order && offset) { diff = offset - b->current_length; if (diff > b->total_length_not_including_first_buffer) return 0; chain_b = b; session_enqueue_discard_chain_bytes (vm, b, &chain_b, diff); chain_bi = vlib_get_buffer_index (vm, chain_b); } else chain_bi = b->next_buffer; do { chain_b = vlib_get_buffer (vm, chain_bi); data = vlib_buffer_get_current (chain_b); len = chain_b->current_length; if (!len) continue; if (is_in_order) { rv = svm_fifo_enqueue (s->rx_fifo, len, data); if (rv == len) { written += rv; } else if (rv < len) { return (rv > 0) ? (written + rv) : written; } else if (rv > len) { written += rv; /* written more than what was left in chain */ if (written > b->total_length_not_including_first_buffer) return written; /* drop the bytes that have already been delivered */ session_enqueue_discard_chain_bytes (vm, b, &chain_b, rv - len); } } else { rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset, len, data); if (rv) { clib_warning ("failed to enqueue multi-buffer seg"); return -1; } offset += len; } } while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT) ? chain_b->next_buffer : 0)); if (is_in_order) return written; return 0; } void session_fifo_tuning (session_t * s, svm_fifo_t * f, session_ft_action_t act, u32 len) { if (s->flags & SESSION_F_CUSTOM_FIFO_TUNING) { app_worker_t *app_wrk = app_worker_get (s->app_wrk_index); app_worker_session_fifo_tuning (app_wrk, s, f, act, len); if (CLIB_ASSERT_ENABLE) { segment_manager_t *sm; sm = segment_manager_get (f->segment_manager); ASSERT (f->shr->size >= 4096); ASSERT (f->shr->size <= sm->max_fifo_size); } } } void session_wrk_program_app_wrk_evts (session_worker_t *wrk, u32 app_wrk_index) { u8 need_interrupt; ASSERT ((wrk - session_main.wrk) == vlib_get_thread_index ()); need_interrupt = clib_bitmap_is_zero (wrk->app_wrks_pending_ntf); wrk->app_wrks_pending_ntf = clib_bitmap_set (wrk->app_wrks_pending_ntf, app_wrk_index, 1); if (need_interrupt) vlib_node_set_interrupt_pending (wrk->vm, session_input_node.index); } always_inline void session_program_io_event (app_worker_t *app_wrk, session_t *s, session_evt_type_t et, u8 is_cl) { if (is_cl) { /* Special events for connectionless sessions */ et += SESSION_IO_EVT_BUILTIN_RX - SESSION_IO_EVT_RX; ASSERT (s->thread_index == 0 || et == SESSION_IO_EVT_TX_MAIN); session_event_t evt = { .event_type = et, .session_handle = session_handle (s), }; app_worker_add_event_custom (app_wrk, vlib_get_thread_index (), &evt); } else { app_worker_add_event (app_wrk, s, et); } } static inline int session_notify_subscribers (u32 app_index, session_t *s, svm_fifo_t *f, session_evt_type_t evt_type) { app_worker_t *app_wrk; application_t *app; u8 is_cl; int i; app = application_get (app_index); if (!app) return -1; is_cl = s->thread_index != vlib_get_thread_index (); for (i = 0; i < f->shr->n_subscribers; i++) { app_wrk = application_get_worker (app, f->shr->subscribers[i]); if (!app_wrk) continue; session_program_io_event (app_wrk, s, evt_type, is_cl ? 1 : 0); } return 0; } always_inline int session_enqueue_notify_inline (session_t *s, u8 is_cl) { app_worker_t *app_wrk; app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (PREDICT_FALSE (!app_wrk)) return -1; session_program_io_event (app_wrk, s, SESSION_IO_EVT_RX, is_cl); if (PREDICT_FALSE (svm_fifo_n_subscribers (s->rx_fifo))) return session_notify_subscribers (app_wrk->app_index, s, s->rx_fifo, SESSION_IO_EVT_RX); return 0; } int session_enqueue_notify (session_t *s) { return session_enqueue_notify_inline (s, 0 /* is_cl */); } int session_enqueue_notify_cl (session_t *s) { return session_enqueue_notify_inline (s, 1 /* is_cl */); } int session_dequeue_notify (session_t *s) { app_worker_t *app_wrk; u8 is_cl; /* Unset as soon as event is requested */ svm_fifo_clear_deq_ntf (s->tx_fifo); app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (PREDICT_FALSE (!app_wrk)) return -1; is_cl = s->session_state == SESSION_STATE_LISTENING || s->session_state == SESSION_STATE_OPENED; session_program_io_event (app_wrk, s, SESSION_IO_EVT_TX, is_cl ? 1 : 0); if (PREDICT_FALSE (svm_fifo_n_subscribers (s->tx_fifo))) return session_notify_subscribers (app_wrk->app_index, s, s->tx_fifo, SESSION_IO_EVT_TX); return 0; } /** * Flushes queue of sessions that are to be notified of new data * enqueued events. * * @param transport_proto transport protocol for which queue to be flushed * @param thread_index Thread index for which the flush is to be performed. * @return 0 on success or a positive number indicating the number of * failures due to API queue being full. */ void session_main_flush_enqueue_events (transport_proto_t transport_proto, u32 thread_index) { session_worker_t *wrk = session_main_get_worker (thread_index); session_handle_t *handles; session_t *s; u32 i, is_cl; handles = wrk->session_to_enqueue[transport_proto]; for (i = 0; i < vec_len (handles); i++) { s = session_get_from_handle (handles[i]); session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0 /* TODO/not needed */); is_cl = s->thread_index != thread_index || (s->flags & SESSION_F_IS_CLESS); if (!is_cl) session_enqueue_notify_inline (s, 0); else session_enqueue_notify_inline (s, 1); } vec_reset_length (handles); wrk->session_to_enqueue[transport_proto] = handles; } /* * Enqueue data for delivery to app. If requested, it queues app notification * event for later delivery. * * @param tc Transport connection which is to be enqueued data * @param b Buffer to be enqueued * @param offset Offset at which to start enqueueing if out-of-order * @param queue_event Flag to indicate if peer is to be notified or if event * is to be queued. The former is useful when more data is * enqueued and only one event is to be generated. * @param is_in_order Flag to indicate if data is in order * @return Number of bytes enqueued or a negative value if enqueueing failed. */ int session_enqueue_stream_connection (transport_connection_t * tc, vlib_buffer_t * b, u32 offset, u8 queue_event, u8 is_in_order) { session_t *s; int enqueued = 0, rv, in_order_off; s = session_get (tc->s_index, tc->thread_index); if (is_in_order) { enqueued = svm_fifo_enqueue (s->rx_fifo, b->current_length, vlib_buffer_get_current (b)); if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0)) { in_order_off = enqueued > b->current_length ? enqueued : 0; rv = session_enqueue_chain_tail (s, b, in_order_off, 1); if (rv > 0) enqueued += rv; } } else { rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset, b->current_length, vlib_buffer_get_current (b)); if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv)) session_enqueue_chain_tail (s, b, offset + b->current_length, 0); /* if something was enqueued, report even this as success for ooo * segment handling */ return rv; } if (queue_event) { /* Queue RX event on this fifo. Eventually these will need to be * flushed by calling @ref session_main_flush_enqueue_events () */ if (!(s->flags & SESSION_F_RX_EVT)) { session_worker_t *wrk = session_main_get_worker (s->thread_index); ASSERT (s->thread_index == vlib_get_thread_index ()); s->flags |= SESSION_F_RX_EVT; vec_add1 (wrk->session_to_enqueue[tc->proto], session_handle (s)); } session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0); } return enqueued; } always_inline int session_enqueue_dgram_connection_inline (session_t *s, session_dgram_hdr_t *hdr, vlib_buffer_t *b, u8 proto, u8 queue_event, u32 is_cl) { int rv; ASSERT (svm_fifo_max_enqueue_prod (s->rx_fifo) >= b->current_length + sizeof (*hdr)); if (PREDICT_TRUE (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))) { svm_fifo_seg_t segs[2] = { { (u8 *) hdr, sizeof (*hdr) }, { vlib_buffer_get_current (b), b->current_length } }; rv = svm_fifo_enqueue_segments (s->rx_fifo, segs, 2, 0 /* allow_partial */ ); } else { vlib_main_t *vm = vlib_get_main (); svm_fifo_seg_t *segs = 0, *seg; vlib_buffer_t *it = b; u32 n_segs = 1; vec_add2 (segs, seg, 1); seg->data = (u8 *) hdr; seg->len = sizeof (*hdr); while (it) { vec_add2 (segs, seg, 1); seg->data = vlib_buffer_get_current (it); seg->len = it->current_length; n_segs++; if (!(it->flags & VLIB_BUFFER_NEXT_PRESENT)) break; it = vlib_get_buffer (vm, it->next_buffer); } rv = svm_fifo_enqueue_segments (s->rx_fifo, segs, n_segs, 0 /* allow partial */ ); vec_free (segs); } if (queue_event && rv > 0) { /* Queue RX event on this fifo. Eventually these will need to be * flushed by calling @ref session_main_flush_enqueue_events () */ if (!(s->flags & SESSION_F_RX_EVT)) { u32 thread_index = is_cl ? vlib_get_thread_index () : s->thread_index; session_worker_t *wrk = session_main_get_worker (thread_index); ASSERT (s->thread_index == vlib_get_thread_index () || is_cl); s->flags |= SESSION_F_RX_EVT; vec_add1 (wrk->session_to_enqueue[proto], session_handle (s)); } session_fifo_tuning (s, s->rx_fifo, SESSION_FT_ACTION_ENQUEUED, 0); } return rv > 0 ? rv : 0; } int session_enqueue_dgram_connection (session_t *s, session_dgram_hdr_t *hdr, vlib_buffer_t *b, u8 proto, u8 queue_event) { return session_enqueue_dgram_connection_inline (s, hdr, b, proto, queue_event, 0 /* is_cl */); } int session_enqueue_dgram_connection_cl (session_t *s, session_dgram_hdr_t *hdr, vlib_buffer_t *b, u8 proto, u8 queue_event) { return session_enqueue_dgram_connection_inline (s, hdr, b, proto, queue_event, 1 /* is_cl */); } int session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer, u32 offset, u32 max_bytes) { session_t *s = session_get (tc->s_index, tc->thread_index); return svm_fifo_peek (s->tx_fifo, offset, max_bytes, buffer); } u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes) { session_t *s = session_get (tc->s_index, tc->thread_index); u32 rv; rv = svm_fifo_dequeue_drop (s->tx_fifo, max_bytes); session_fifo_tuning (s, s->tx_fifo, SESSION_FT_ACTION_DEQUEUED, rv); if (svm_fifo_needs_deq_ntf (s->tx_fifo, max_bytes)) session_dequeue_notify (s); return rv; } int session_stream_connect_notify (transport_connection_t * tc, session_error_t err) { u32 opaque = 0, new_ti, new_si; app_worker_t *app_wrk; session_t *s = 0, *ho; /* * Cleanup half-open table */ session_lookup_del_half_open (tc); ho = ho_session_get (tc->s_index); session_set_state (ho, SESSION_STATE_TRANSPORT_CLOSED); opaque = ho->opaque; app_wrk = app_worker_get_if_valid (ho->app_wrk_index); if (!app_wrk) return -1; if (err) return app_worker_connect_notify (app_wrk, s, err, opaque); s = session_alloc_for_connection (tc); session_set_state (s, SESSION_STATE_CONNECTING); s->app_wrk_index = app_wrk->wrk_index; s->opaque = opaque; new_si = s->session_index; new_ti = s->thread_index; if ((err = app_worker_init_connected (app_wrk, s))) { session_free (s); app_worker_connect_notify (app_wrk, 0, err, opaque); return -1; } s = session_get (new_si, new_ti); session_set_state (s, SESSION_STATE_READY); session_lookup_add_connection (tc, session_handle (s)); if (app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, opaque)) { session_lookup_del_connection (tc); /* Avoid notifying app about rejected session cleanup */ s = session_get (new_si, new_ti); segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo); session_free (s); return -1; } return 0; } static void session_switch_pool_closed_rpc (void *arg) { session_handle_t sh; session_t *s; sh = pointer_to_uword (arg); s = session_get_from_handle_if_valid (sh); if (!s) return; transport_cleanup (session_get_transport_proto (s), s->connection_index, s->thread_index); session_cleanup (s); } typedef struct _session_switch_pool_args { u32 session_index; u32 thread_index; u32 new_thread_index; u32 new_session_index; } session_switch_pool_args_t; /** * Notify old thread of the session pool switch */ static void session_switch_pool (void *cb_args) { session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args; session_handle_t sh, new_sh; segment_manager_t *sm; app_worker_t *app_wrk; session_t *s; ASSERT (args->thread_index == vlib_get_thread_index ()); s = session_get (args->session_index, args->thread_index); app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (!app_wrk) goto app_closed; /* Cleanup fifo segment slice state for fifos */ sm = app_worker_get_connect_segment_manager (app_wrk); segment_manager_detach_fifo (sm, &s->rx_fifo); segment_manager_detach_fifo (sm, &s->tx_fifo); /* Check if session closed during migration */ if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING) goto app_closed; new_sh = session_make_handle (args->new_session_index, args->new_thread_index); app_worker_migrate_notify (app_wrk, s, new_sh); clib_mem_free (cb_args); return; app_closed: /* Session closed during migration. Clean everything up */ sh = session_handle (s); session_send_rpc_evt_to_thread (args->new_thread_index, session_switch_pool_closed_rpc, uword_to_pointer (sh, void *)); clib_mem_free (cb_args); } /** * Move dgram session to the right thread */ int session_dgram_connect_notify (transport_connection_t * tc, u32 old_thread_index, session_t ** new_session) { session_t *new_s; session_switch_pool_args_t *rpc_args; segment_manager_t *sm; app_worker_t *app_wrk; /* * Clone half-open session to the right thread. */ new_s = session_clone_safe (tc->s_index, old_thread_index); new_s->connection_index = tc->c_index; session_set_state (new_s, SESSION_STATE_READY); new_s->flags |= SESSION_F_IS_MIGRATING; if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP)) session_lookup_add_connection (tc, session_handle (new_s)); app_wrk = app_worker_get_if_valid (new_s->app_wrk_index); if (app_wrk) { /* New set of fifos attached to the same shared memory */ sm = app_worker_get_connect_segment_manager (app_wrk); segment_manager_attach_fifo (sm, &new_s->rx_fifo, new_s); segment_manager_attach_fifo (sm, &new_s->tx_fifo, new_s); } /* * Ask thread owning the old session to clean it up and make us the tx * fifo owner */ rpc_args = clib_mem_alloc (sizeof (*rpc_args)); rpc_args->new_session_index = new_s->session_index; rpc_args->new_thread_index = new_s->thread_index; rpc_args->session_index = tc->s_index; rpc_args->thread_index = old_thread_index; session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool, rpc_args); tc->s_index = new_s->session_index; new_s->connection_index = tc->c_index; *new_session = new_s; return 0; } /** * Notification from transport that connection is being closed. * * A disconnect is sent to application but state is not removed. Once * disconnect is acknowledged by application, session disconnect is called. * Ultimately this leads to close being called on transport (passive close). */ void session_transport_closing_notify (transport_connection_t * tc) { app_worker_t *app_wrk; session_t *s; s = session_get (tc->s_index, tc->thread_index); if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING) return; /* Wait for reply from app before sending notification as the * accept might be rejected */ if (s->session_state == SESSION_STATE_ACCEPTING) { session_set_state (s, SESSION_STATE_TRANSPORT_CLOSING); return; } session_set_state (s, SESSION_STATE_TRANSPORT_CLOSING); app_wrk = app_worker_get (s->app_wrk_index); app_worker_close_notify (app_wrk, s); } /** * Notification from transport that connection is being deleted * * This removes the session if it is still valid. It should be called only on * previously fully established sessions. For instance failed connects should * call stream_session_connect_notify and indicate that the connect has * failed. */ void session_transport_delete_notify (transport_connection_t * tc) { session_t *s; /* App might've been removed already */ if (!(s = session_get_if_valid (tc->s_index, tc->thread_index))) return; switch (s->session_state) { case SESSION_STATE_CREATED: /* Session was created but accept notification was not yet sent to the * app. Cleanup everything. */ session_lookup_del_session (s); segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo); session_free (s); break; case SESSION_STATE_ACCEPTING: case SESSION_STATE_TRANSPORT_CLOSING: case SESSION_STATE_CLOSING: case SESSION_STATE_TRANSPORT_CLOSED: /* If transport finishes or times out before we get a reply * from the app, mark transport as closed and wait for reply * before removing the session. Cleanup session table in advance * because transport will soon be closed and closed sessions * are assumed to have been removed from the lookup table */ session_lookup_del_session (s); session_set_state (s, SESSION_STATE_TRANSPORT_DELETED); session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT); svm_fifo_dequeue_drop_all (s->tx_fifo); break; case SESSION_STATE_APP_CLOSED: /* Cleanup lookup table as transport needs to still be valid. * Program transport close to ensure that all session events * have been cleaned up. Once transport close is called, the * session is just removed because both transport and app have * confirmed the close*/ session_lookup_del_session (s); session_set_state (s, SESSION_STATE_TRANSPORT_DELETED); session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT); svm_fifo_dequeue_drop_all (s->tx_fifo); session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE); break; case SESSION_STATE_TRANSPORT_DELETED: break; case SESSION_STATE_CLOSED: session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT); session_set_state (s, SESSION_STATE_TRANSPORT_DELETED); session_delete (s); break; default: clib_warning ("session state %u", s->session_state); session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT); session_delete (s); break; } } /** * Notification from transport that it is closed * * Should be called by transport, prior to calling delete notify, once it * knows that no more data will be exchanged. This could serve as an * early acknowledgment of an active close especially if transport delete * can be delayed a long time, e.g., tcp time-wait. */ void session_transport_closed_notify (transport_connection_t * tc) { app_worker_t *app_wrk; session_t *s; if (!(s = session_get_if_valid (tc->s_index, tc->thread_index))) return; if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED) return; /* Transport thinks that app requested close but it actually didn't. * Can happen for tcp: * 1)if fin and rst are received in close succession. * 2)if app shutdown the connection. */ if (s->session_state == SESSION_STATE_READY) { session_transport_closing_notify (tc); svm_fifo_dequeue_drop_all (s->tx_fifo); session_set_state (s, SESSION_STATE_TRANSPORT_CLOSED); } /* If app close has not been received or has not yet resulted in * a transport close, only mark the session transport as closed */ else if (s->session_state <= SESSION_STATE_CLOSING) session_set_state (s, SESSION_STATE_TRANSPORT_CLOSED); /* If app also closed, switch to closed */ else if (s->session_state == SESSION_STATE_APP_CLOSED) session_set_state (s, SESSION_STATE_CLOSED); app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (app_wrk) app_worker_transport_closed_notify (app_wrk, s); } /** * Notify application that connection has been reset. */ void session_transport_reset_notify (transport_connection_t * tc) { app_worker_t *app_wrk; session_t *s; s = session_get (tc->s_index, tc->thread_index); svm_fifo_dequeue_drop_all (s->tx_fifo); if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING) return; if (s->session_state == SESSION_STATE_ACCEPTING) { session_set_state (s, SESSION_STATE_TRANSPORT_CLOSING); return; } session_set_state (s, SESSION_STATE_TRANSPORT_CLOSING); app_wrk = app_worker_get (s->app_wrk_index); app_worker_reset_notify (app_wrk, s); } int session_stream_accept_notify (transport_connection_t * tc) { app_worker_t *app_wrk; session_t *s; s = session_get (tc->s_index, tc->thread_index); app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (!app_wrk) return -1; if (s->session_state != SESSION_STATE_CREATED) return 0; session_set_state (s, SESSION_STATE_ACCEPTING); if (app_worker_accept_notify (app_wrk, s)) { /* On transport delete, no notifications should be sent. Unless, the * accept is retried and successful. */ session_set_state (s, SESSION_STATE_CREATED); return -1; } return 0; } /** * Accept a stream session. Optionally ping the server by callback. */ int session_stream_accept (transport_connection_t * tc, u32 listener_index, u32 thread_index, u8 notify) { session_t *s; int rv; s = session_alloc_for_connection (tc); s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index; session_set_state (s, SESSION_STATE_CREATED); if ((rv = app_worker_init_accepted (s))) { session_free (s); return rv; } session_lookup_add_connection (tc, session_handle (s)); /* Shoulder-tap the server */ if (notify) { app_worker_t *app_wrk = app_worker_get (s->app_wrk_index); if ((rv = app_worker_accept_notify (app_wrk, s))) { session_lookup_del_session (s); segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo); session_free (s); return rv; } } return 0; } int session_dgram_accept (transport_connection_t * tc, u32 listener_index, u32 thread_index) { app_worker_t *app_wrk; session_t *s; int rv; s = session_alloc_for_connection (tc); s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index; if ((rv = app_worker_init_accepted (s))) { session_free (s); return rv; } session_lookup_add_connection (tc, session_handle (s)); session_set_state (s, SESSION_STATE_ACCEPTING); app_wrk = app_worker_get (s->app_wrk_index); if ((rv = app_worker_accept_notify (app_wrk, s))) { session_lookup_del_session (s); segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo); session_free (s); return rv; } return 0; } int session_open_cl (session_endpoint_cfg_t *rmt, session_handle_t *rsh) { transport_connection_t *tc; transport_endpoint_cfg_t *tep; app_worker_t *app_wrk; session_handle_t sh; session_t *s; int rv; tep = session_endpoint_to_transport_cfg (rmt); rv = transport_connect (rmt->transport_proto, tep); if (rv < 0) { SESSION_DBG ("Transport failed to open connection."); return rv; } tc = transport_get_half_open (rmt->transport_proto, (u32) rv); /* For dgram type of service, allocate session and fifos now */ app_wrk = app_worker_get (rmt->app_wrk_index); s = session_alloc_for_connection (tc); s->app_wrk_index = app_wrk->wrk_index; s->opaque = rmt->opaque; session_set_state (s, SESSION_STATE_OPENED); if (transport_connection_is_cless (tc)) s->flags |= SESSION_F_IS_CLESS; if (app_worker_init_connected (app_wrk, s)) { session_free (s); return -1; } sh = session_handle (s); *rsh = sh; session_lookup_add_connection (tc, sh); return app_worker_connect_notify (app_wrk, s, SESSION_E_NONE, rmt->opaque); } int session_open_vc (session_endpoint_cfg_t *rmt, session_handle_t *rsh) { transport_connection_t *tc; transport_endpoint_cfg_t *tep; app_worker_t *app_wrk; session_t *ho; int rv; tep = session_endpoint_to_transport_cfg (rmt); rv = transport_connect (rmt->transport_proto, tep); if (rv < 0) { SESSION_DBG ("Transport failed to open connection."); return rv; } tc = transport_get_half_open (rmt->transport_proto, (u32) rv); app_wrk = app_worker_get (rmt->app_wrk_index); /* If transport offers a vc service, only allocate established * session once the connection has been established. * In the meantime allocate half-open session for tracking purposes * associate half-open connection to it and add session to app-worker * half-open table. These are needed to allocate the established * session on transport notification, and to cleanup the half-open * session if the app detaches before connection establishment. */ ho = session_alloc_for_half_open (tc); ho->app_wrk_index = app_wrk->wrk_index; ho->ho_index = app_worker_add_half_open (app_wrk, session_handle (ho)); ho->opaque = rmt->opaque; *rsh = session_handle (ho); if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP)) session_lookup_add_half_open (tc, tc->c_index); return 0; } int session_open_app (session_endpoint_cfg_t *rmt, session_handle_t *rsh) { transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (rmt); /* Not supported for now */ *rsh = SESSION_INVALID_HANDLE; return transport_connect (rmt->transport_proto, tep_cfg); } typedef int (*session_open_service_fn) (session_endpoint_cfg_t *, session_handle_t *); /* *INDENT-OFF* */ static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = { session_open_vc, session_open_cl, session_open_app, }; /* *INDENT-ON* */ /** * Ask transport to open connection to remote transport endpoint. * * Stores handle for matching request with reply since the call can be * asynchronous. For instance, for TCP the 3-way handshake must complete * before reply comes. Session is only created once connection is established. * * @param app_index Index of the application requesting the connect * @param st Session type requested. * @param tep Remote transport endpoint * @param opaque Opaque data (typically, api_context) the application expects * on open completion. */ int session_open (session_endpoint_cfg_t *rmt, session_handle_t *rsh) { transport_service_type_t tst; tst = transport_protocol_service_type (rmt->transport_proto); return session_open_srv_fns[tst](rmt, rsh); } /** * Ask transport to listen on session endpoint. * * @param s Session for which listen will be called. Note that unlike * established sessions, listen sessions are not associated to a * thread. * @param sep Local endpoint to be listened on. */ int session_listen (session_t * ls, session_endpoint_cfg_t * sep) { transport_endpoint_cfg_t *tep; int tc_index; u32 s_index; /* Transport bind/listen */ tep = session_endpoint_to_transport_cfg (sep); s_index = ls->session_index; tc_index = transport_start_listen (session_get_transport_proto (ls), s_index, tep); if (tc_index < 0) return tc_index; /* Attach transport to session. Lookup tables are populated by the app * worker because local tables (for ct sessions) are not backed by a fib */ ls = listen_session_get (s_index); ls->connection_index = tc_index; ls->opaque = sep->opaque; if (transport_connection_is_cless (session_get_transport (ls))) ls->flags |= SESSION_F_IS_CLESS; return 0; } /** * Ask transport to stop listening on local transport endpoint. * * @param s Session to stop listening on. It must be in state LISTENING. */ int session_stop_listen (session_t * s) { transport_proto_t tp = session_get_transport_proto (s); transport_connection_t *tc; if (s->session_state != SESSION_STATE_LISTENING) return SESSION_E_NOLISTEN; tc = transport_get_listener (tp, s->connection_index); /* If no transport, assume everything was cleaned up already */ if (!tc) return SESSION_E_NONE; if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP)) session_lookup_del_connection (tc); transport_stop_listen (tp, s->connection_index); return 0; } /** * Initialize session half-closing procedure. * * Note that half-closing will not change the state of the session. */ void session_half_close (session_t *s) { if (!s) return; session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_HALF_CLOSE); } /** * Initialize session closing procedure. * * Request is always sent to session node to ensure that all outstanding * requests are served before transport is notified. */ void session_close (session_t * s) { if (!s || (s->flags & SESSION_F_APP_CLOSED)) return; /* Transports can close and delete their state independent of app closes * and transport initiated state transitions can hide app closes. Instead * of extending the state machine to support separate tracking of app and * transport initiated closes, use a flag. */ s->flags |= SESSION_F_APP_CLOSED; if (s->session_state >= SESSION_STATE_CLOSING) { /* Session will only be removed once both app and transport * acknowledge the close */ if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED || s->session_state == SESSION_STATE_TRANSPORT_DELETED) session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE); return; } /* App closed so stop propagating dequeue notifications. * App might disconnect session before connected, in this case, * tx_fifo may not be setup yet, so clear only it's inited. */ if (s->tx_fifo) svm_fifo_clear_deq_ntf (s->tx_fifo); session_set_state (s, SESSION_STATE_CLOSING); session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE); } /** * Force a close without waiting for data to be flushed */ void session_reset (session_t * s) { if (s->session_state >= SESSION_STATE_CLOSING) return; /* Drop all outstanding tx data * App might disconnect session before connected, in this case, * tx_fifo may not be setup yet, so clear only it's inited. */ if (s->tx_fifo) svm_fifo_dequeue_drop_all (s->tx_fifo); session_set_state (s, SESSION_STATE_CLOSING); session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_RESET); } /** * Notify transport the session can be half-disconnected. * * Must be called from the session's thread. */ void session_transport_half_close (session_t *s) { /* Only READY session can be half-closed */ if (s->session_state != SESSION_STATE_READY) { return; } transport_half_close (session_get_transport_proto (s), s->connection_index, s->thread_index); } /** * Notify transport the session can be disconnected. This should eventually * result in a delete notification that allows us to cleanup session state. * Called for both active/passive disconnects. * * Must be called from the session's thread. */ void session_transport_close (session_t * s) { if (s->session_state >= SESSION_STATE_APP_CLOSED) { if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED) session_set_state (s, SESSION_STATE_CLOSED); /* If transport is already deleted, just free the session */ else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED) session_program_cleanup (s); return; } /* If the tx queue wasn't drained, the transport can continue to try * sending the outstanding data (in closed state it cannot). It MUST however * at one point, either after sending everything or after a timeout, call * delete notify. This will finally lead to the complete cleanup of the * session. */ session_set_state (s, SESSION_STATE_APP_CLOSED); transport_close (session_get_transport_proto (s), s->connection_index, s->thread_index); } /** * Force transport close */ void session_transport_reset (session_t * s) { if (s->session_state >= SESSION_STATE_APP_CLOSED) { if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED) session_set_state (s, SESSION_STATE_CLOSED); else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED) session_program_cleanup (s); return; } session_set_state (s, SESSION_STATE_APP_CLOSED); transport_reset (session_get_transport_proto (s), s->connection_index, s->thread_index); } /** * Cleanup transport and session state. * * Notify transport of the cleanup and free the session. This should * be called only if transport reported some error and is already * closed. */ void session_transport_cleanup (session_t * s) { /* Delete from main lookup table before we axe the the transport */ session_lookup_del_session (s); if (s->session_state != SESSION_STATE_TRANSPORT_DELETED) transport_cleanup (session_get_transport_proto (s), s->connection_index, s->thread_index); /* Since we called cleanup, no delete notification will come. So, make * sure the session is properly freed. */ segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo); session_free (s); } /** * Allocate worker mqs in share-able segment * * That can only be a newly created memfd segment, that must be mapped * by all apps/stack users unless private rx mqs are enabled. */ void session_vpp_wrk_mqs_alloc (session_main_t *smm) { u32 mq_q_length = 2048, evt_size = sizeof (session_event_t); fifo_segment_t *mqs_seg = &smm->wrk_mqs_segment; svm_msg_q_cfg_t _cfg, *cfg = &_cfg; uword mqs_seg_size; int i; mq_q_length = clib_max (mq_q_length, smm->configured_wrk_mq_length); svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = { { mq_q_length, evt_size, 0 }, { mq_q_length >> 1, 256, 0 } }; cfg->consumer_pid = 0; cfg->n_rings = 2; cfg->q_nitems = mq_q_length; cfg->ring_cfgs = rc; /* * Compute mqs segment size based on rings config and leave space * for passing extended configuration messages, i.e., data allocated * outside of the rings. If provided with a config value, accept it * if larger than minimum size. */ mqs_seg_size = svm_msg_q_size_to_alloc (cfg) * vec_len (smm->wrk); mqs_seg_size = mqs_seg_size + (1 << 20); mqs_seg_size = clib_max (mqs_seg_size, smm->wrk_mqs_segment_size); mqs_seg->ssvm.ssvm_size = mqs_seg_size; mqs_seg->ssvm.my_pid = getpid (); mqs_seg->ssvm.name = format (0, "%s%c", "session: wrk-mqs-segment", 0); if (ssvm_server_init (&mqs_seg->ssvm, SSVM_SEGMENT_MEMFD)) { clib_warning ("failed to initialize queue segment"); return; } fifo_segment_init (mqs_seg); /* Special fifo segment that's filled only with mqs */ mqs_seg->h->n_mqs = vec_len (smm->wrk); for (i = 0; i < vec_len (smm->wrk); i++) smm->wrk[i].vpp_event_queue = fifo_segment_msg_q_alloc (mqs_seg, i, cfg); } fifo_segment_t * session_main_get_wrk_mqs_segment (void) { return &session_main.wrk_mqs_segment; } u64 session_segment_handle (session_t * s) { svm_fifo_t *f; if (!s->rx_fifo) return SESSION_INVALID_HANDLE; f = s->rx_fifo; return segment_manager_make_segment_handle (f->segment_manager, f->segment_index); } void session_get_original_dst (transport_endpoint_t *i2o_src, transport_endpoint_t *i2o_dst, transport_proto_t transport_proto, u32 *original_dst, u16 *original_dst_port) { session_main_t *smm = vnet_get_session_main (); ip_protocol_t proto = (transport_proto == TRANSPORT_PROTO_TCP ? IPPROTO_TCP : IPPROTO_UDP); if (!smm->original_dst_lookup || !i2o_dst->is_ip4) return; smm->original_dst_lookup (&i2o_src->ip.ip4, i2o_src->port, &i2o_dst->ip.ip4, i2o_dst->port, proto, original_dst, original_dst_port); } /* *INDENT-OFF* */ static session_fifo_rx_fn *session_tx_fns[TRANSPORT_TX_N_FNS] = { session_tx_fifo_peek_and_snd, session_tx_fifo_dequeue_and_snd, session_tx_fifo_dequeue_internal, session_tx_fifo_dequeue_and_snd }; /* *INDENT-ON* */ void session_register_transport (transport_proto_t transport_proto, const transport_proto_vft_t * vft, u8 is_ip4, u32 output_node) { session_main_t *smm = &session_main; session_type_t session_type; u32 next_index = ~0; session_type = session_type_from_proto_and_ip (transport_proto, is_ip4); vec_validate (smm->session_type_to_next, session_type); vec_validate (smm->session_tx_fns, session_type); if (output_node != ~0) next_index = vlib_node_add_next (vlib_get_main (), session_queue_node.index, output_node); smm->session_type_to_next[session_type] = next_index; smm->session_tx_fns[session_type] = session_tx_fns[vft->transport_options.tx_type]; } void session_register_update_time_fn (session_update_time_fn fn, u8 is_add) { session_main_t *smm = &session_main; session_update_time_fn *fi; u32 fi_pos = ~0; u8 found = 0; vec_foreach (fi, smm->update_time_fns) { if (*fi == fn) { fi_pos = fi - smm->update_time_fns; found = 1; break; } } if (is_add) { if (found) { clib_warning ("update time fn %p already registered", fn); return; } vec_add1 (smm->update_time_fns, fn); } else { vec_del1 (smm->update_time_fns, fi_pos); } } transport_proto_t session_add_transport_proto (void) { session_main_t *smm = &session_main; session_worker_t *wrk; u32 thread; smm->last_transport_proto_type += 1; for (thread = 0; thread < vec_len (smm->wrk); thread++) { wrk = session_main_get_worker (thread); vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type); } return smm->last_transport_proto_type; } transport_connection_t * session_get_transport (session_t * s) { if (s->session_state != SESSION_STATE_LISTENING) return transport_get_connection (session_get_transport_proto (s), s->connection_index, s->thread_index); else return transport_get_listener (session_get_transport_proto (s), s->connection_index); } void session_get_endpoint (session_t * s, transport_endpoint_t * tep, u8 is_lcl) { if (s->session_state != SESSION_STATE_LISTENING) return transport_get_endpoint (session_get_transport_proto (s), s->connection_index, s->thread_index, tep, is_lcl); else return transport_get_listener_endpoint (session_get_transport_proto (s), s->connection_index, tep, is_lcl); } int session_transport_attribute (session_t *s, u8 is_get, transport_endpt_attr_t *attr) { if (s->session_state < SESSION_STATE_READY) return -1; return transport_connection_attribute (session_get_transport_proto (s), s->connection_index, s->thread_index, is_get, attr); } transport_connection_t * listen_session_get_transport (session_t * s) { return transport_get_listener (session_get_transport_proto (s), s->connection_index); } void session_queue_run_on_main_thread (vlib_main_t * vm) { ASSERT (vlib_get_thread_index () == 0); vlib_node_set_interrupt_pending (vm, session_queue_node.index); } static void session_stats_collector_fn (vlib_stats_collector_data_t *d) { u32 i, n_workers, n_wrk_sessions, n_sessions = 0; session_main_t *smm = &session_main; session_worker_t *wrk; counter_t **counters; counter_t *cb; n_workers = vec_len (smm->wrk); vlib_stats_validate (d->entry_index, 0, n_workers - 1); counters = d->entry->data; cb = counters[0]; for (i = 0; i < vec_len (smm->wrk); i++) { wrk = session_main_get_worker (i); n_wrk_sessions = pool_elts (wrk->sessions); cb[i] = n_wrk_sessions; n_sessions += n_wrk_sessions; } vlib_stats_set_gauge (d->private_data, n_sessions); } static void session_stats_collector_init (void) { vlib_stats_collector_reg_t reg = {}; reg.entry_index = vlib_stats_add_counter_vector ("/sys/session/sessions_per_worker"); reg.private_data = vlib_stats_add_gauge ("/sys/session/sessions_total"); reg.collect_fn = session_stats_collector_fn; vlib_stats_register_collector_fn (&reg); vlib_stats_validate (reg.entry_index, 0, vlib_get_n_threads ()); } static clib_error_t * session_manager_main_enable (vlib_main_t * vm) { session_main_t *smm = &session_main; vlib_thread_main_t *vtm = vlib_get_thread_main (); u32 num_threads, preallocated_sessions_per_worker; session_worker_t *wrk; int i; /* We only initialize once and do not de-initialized on disable */ if (smm->is_initialized) goto done; num_threads = 1 /* main thread */ + vtm->n_threads; if (num_threads < 1) return clib_error_return (0, "n_thread_stacks not set"); /* Allocate cache line aligned worker contexts */ vec_validate_aligned (smm->wrk, num_threads - 1, CLIB_CACHE_LINE_BYTES); clib_spinlock_init (&session_main.pool_realloc_lock); for (i = 0; i < num_threads; i++) { wrk = &smm->wrk[i]; wrk->ctrl_head = clib_llist_make_head (wrk->event_elts, evt_list); wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list); wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list); wrk->pending_connects = clib_llist_make_head (wrk->event_elts, evt_list); wrk->evts_pending_main = clib_llist_make_head (wrk->event_elts, evt_list); wrk->vm = vlib_get_main_by_index (i); wrk->last_vlib_time = vlib_time_now (vm); wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ; wrk->timerfd = -1; vec_validate (wrk->session_to_enqueue, smm->last_transport_proto_type); if (!smm->no_adaptive && smm->use_private_rx_mqs) session_wrk_enable_adaptive_mode (wrk); } /* Allocate vpp event queues segment and queue */ session_vpp_wrk_mqs_alloc (smm); /* Initialize segment manager properties */ segment_manager_main_init (); /* Preallocate sessions */ if (smm->preallocated_sessions) { if (num_threads == 1) { pool_init_fixed (smm->wrk[0].sessions, smm->preallocated_sessions); } else { int j; preallocated_sessions_per_worker = (1.1 * (f64) smm->preallocated_sessions / (f64) (num_threads - 1)); for (j = 1; j < num_threads; j++) { pool_init_fixed (smm->wrk[j].sessions, preallocated_sessions_per_worker); } } } session_lookup_init (); app_namespaces_init (); transport_init (); session_stats_collector_init (); smm->is_initialized = 1; done: smm->is_enabled = 1; /* Enable transports */ transport_enable_disable (vm, 1); session_debug_init (); return 0; } static void session_manager_main_disable (vlib_main_t * vm) { transport_enable_disable (vm, 0 /* is_en */ ); } /* in this new callback, cookie hint the index */ void session_dma_completion_cb (vlib_main_t *vm, struct vlib_dma_batch *batch) { session_worker_t *wrk; wrk = session_main_get_worker (vm->thread_index); session_dma_transfer *dma_transfer; dma_transfer = &wrk->dma_trans[wrk->trans_head]; vec_add (wrk->pending_tx_buffers, dma_transfer->pending_tx_buffers, vec_len (dma_transfer->pending_tx_buffers)); vec_add (wrk->pending_tx_nexts, dma_transfer->pending_tx_nexts, vec_len (dma_transfer->pending_tx_nexts)); vec_reset_length (dma_transfer->pending_tx_buffers); vec_reset_length (dma_transfer->pending_tx_nexts); wrk->trans_head++; if (wrk->trans_head == wrk->trans_size) wrk->trans_head = 0; return; } static void session_prepare_dma_args (vlib_dma_config_t *args) { args->max_batches = 16; args->max_transfers = DMA_TRANS_SIZE; args->max_transfer_size = 65536; args->features = 0; args->sw_fallback = 1; args->barrier_before_last = 1; args->callback_fn = session_dma_completion_cb; } static void session_node_enable_dma (u8 is_en, int n_vlibs) { vlib_dma_config_t args; session_prepare_dma_args (&args); session_worker_t *wrk; vlib_main_t *vm; int config_index = -1; if (is_en) { vm = vlib_get_main_by_index (0); config_index = vlib_dma_config_add (vm, &args); } else { vm = vlib_get_main_by_index (0); wrk = session_main_get_worker (0); if (wrk->config_index >= 0) vlib_dma_config_del (vm, wrk->config_index); } int i; for (i = 0; i < n_vlibs; i++) { vm = vlib_get_main_by_index (i); wrk = session_main_get_worker (vm->thread_index); wrk->config_index = config_index; if (is_en) { if (config_index >= 0) wrk->dma_enabled = true; wrk->dma_trans = (session_dma_transfer *) clib_mem_alloc ( sizeof (session_dma_transfer) * DMA_TRANS_SIZE); bzero (wrk->dma_trans, sizeof (session_dma_transfer) * DMA_TRANS_SIZE); } else { if (wrk->dma_trans) clib_mem_free (wrk->dma_trans); } wrk->trans_head = 0; wrk->trans_tail = 0; wrk->trans_size = DMA_TRANS_SIZE; } } void session_node_enable_disable (u8 is_en) { u8 mstate = is_en ? VLIB_NODE_STATE_INTERRUPT : VLIB_NODE_STATE_DISABLED; u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED; session_main_t *sm = &session_main; vlib_main_t *vm; vlib_node_t *n; int n_vlibs, i; n_vlibs = vlib_get_n_threads (); for (i = 0; i < n_vlibs; i++) { vm = vlib_get_main_by_index (i); /* main thread with workers and not polling */ if (i == 0 && n_vlibs > 1) { vlib_node_set_state (vm, session_queue_node.index, mstate); if (is_en) { session_main_get_worker (0)->state = SESSION_WRK_INTERRUPT; vlib_node_set_state (vm, session_queue_process_node.index, state); n = vlib_get_node (vm, session_queue_process_node.index); vlib_start_process (vm, n->runtime_index); } else { vlib_process_signal_event_mt (vm, session_queue_process_node.index, SESSION_Q_PROCESS_STOP, 0); } if (!sm->poll_main) continue; } vlib_node_set_state (vm, session_input_node.index, mstate); vlib_node_set_state (vm, session_queue_node.index, state); } if (sm->use_private_rx_mqs) application_enable_rx_mqs_nodes (is_en); if (sm->dma_enabled) session_node_enable_dma (is_en, n_vlibs); } clib_error_t * vnet_session_enable_disable (vlib_main_t * vm, u8 is_en) { clib_error_t *error = 0; if (is_en) { if (session_main.is_enabled) return 0; error = session_manager_main_enable (vm); session_node_enable_disable (is_en); } else { session_main.is_enabled = 0; session_manager_main_disable (vm); session_node_enable_disable (is_en); } return error; } clib_error_t * session_main_init (vlib_main_t * vm) { session_main_t *smm = &session_main; smm->is_enabled = 0; smm->session_enable_asap = 0; smm->poll_main = 0; smm->use_private_rx_mqs = 0; smm->no_adaptive = 0; smm->last_transport_proto_type = TRANSPORT_PROTO_HTTP; smm->port_allocator_min_src_port = 1024; smm->port_allocator_max_src_port = 65535; return 0; } static clib_error_t * session_main_loop_init (vlib_main_t * vm) { session_main_t *smm = &session_main; if (smm->session_enable_asap) { vlib_worker_thread_barrier_sync (vm); vnet_session_enable_disable (vm, 1 /* is_en */ ); vlib_worker_thread_barrier_release (vm); } return 0; } VLIB_INIT_FUNCTION (session_main_init); VLIB_MAIN_LOOP_ENTER_FUNCTION (session_main_loop_init); static clib_error_t * session_config_fn (vlib_main_t * vm, unformat_input_t * input) { session_main_t *smm = &session_main; u32 nitems; uword tmp; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "wrk-mq-length %d", &nitems)) { if (nitems >= 2048) smm->configured_wrk_mq_length = nitems; else clib_warning ("event queue length %d too small, ignored", nitems); } else if (unformat (input, "wrk-mqs-segment-size %U", unformat_memory_size, &smm->wrk_mqs_segment_size)) ; else if (unformat (input, "preallocated-sessions %d", &smm->preallocated_sessions)) ; else if (unformat (input, "v4-session-table-buckets %d", &smm->configured_v4_session_table_buckets)) ; else if (unformat (input, "v4-halfopen-table-buckets %d", &smm->configured_v4_halfopen_table_buckets)) ; else if (unformat (input, "v6-session-table-buckets %d", &smm->configured_v6_session_table_buckets)) ; else if (unformat (input, "v6-halfopen-table-buckets %d", &smm->configured_v6_halfopen_table_buckets)) ; else if (unformat (input, "v4-session-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->configured_v4_session_table_memory = tmp; } else if (unformat (input, "v4-halfopen-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->configured_v4_halfopen_table_memory = tmp; } else if (unformat (input, "v6-session-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->configured_v6_session_table_memory = tmp; } else if (unformat (input, "v6-halfopen-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->configured_v6_halfopen_table_memory = tmp; } else if (unformat (input, "local-endpoints-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->local_endpoints_table_memory = tmp; } else if (unformat (input, "local-endpoints-table-buckets %d", &smm->local_endpoints_table_buckets)) ; else if (unformat (input, "min-src-port %d", &tmp)) smm->port_allocator_min_src_port = tmp; else if (unformat (input, "max-src-port %d", &tmp)) smm->port_allocator_max_src_port = tmp; else if (unformat (input, "enable")) smm->session_enable_asap = 1; else if (unformat (input, "use-app-socket-api")) (void) appns_sapi_enable_disable (1 /* is_enable */); else if (unformat (input, "poll-main")) smm->poll_main = 1; else if (unformat (input, "use-private-rx-mqs")) smm->use_private_rx_mqs = 1; else if (unformat (input, "no-adaptive")) smm->no_adaptive = 1; else if (unformat (input, "use-dma")) smm->dma_enabled = 1; else if (unformat (input, "nat44-original-dst-enable")) { smm->original_dst_lookup = vlib_get_plugin_symbol ( "nat_plugin.so", "nat44_original_dst_lookup"); } /* * Deprecated but maintained for compatibility */ else if (unformat (input, "evt_qs_memfd_seg")) ; else if (unformat (input, "segment-baseva 0x%lx", &tmp)) ; else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size, &smm->wrk_mqs_segment_size)) ; else if (unformat (input, "event-queue-length %d", &nitems)) { if (nitems >= 2048) smm->configured_wrk_mq_length = nitems; else clib_warning ("event queue length %d too small, ignored", nitems); } else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } return 0; } VLIB_CONFIG_FUNCTION (session_config_fn, "session"); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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