vpp - Vector Packet Processing

Age	Commit message (Collapse)	Author	Files	Lines
2018-11-12	docs: add 1810, including package cloud	jdenisco	7	-10/+61
	Change-Id: Ieae5fc7c1e099392bc2a4e5948669d9210f2ebac Signed-off-by: jdenisco <jdenisco@cisco.com>
2018-08-30	docs: Add features by release section	Scitt Keeler	10	-0/+705
	Change-Id: Ibcae8c8ecdf8a3c2d7bcf96bf7cd5b741e2fad22 Signed-off-by: Scitt Keeler <skeeler@cisco.com>

/* * Copyright (c) 2017 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/session/session.h> #include <vlibmemory/api.h> #include <vnet/dpo/load_balance.h> #include <vnet/fib/ip4_fib.h> #include <vnet/session/application.h> #include <vnet/tcp/tcp.h> #include <vnet/session/session_debug.h> /** * Per-type vector of transport protocol virtual function tables */ static transport_proto_vft_t *tp_vfts; session_manager_main_t session_manager_main; /* * Session lookup key; (src-ip, dst-ip, src-port, dst-port, session-type) * Value: (owner thread index << 32 | session_index); */ void stream_session_table_add_for_tc (transport_connection_t * tc, u64 value) { session_manager_main_t *smm = &session_manager_main; session_kv4_t kv4; session_kv6_t kv6; switch (tc->proto) { case SESSION_TYPE_IP4_UDP: case SESSION_TYPE_IP4_TCP: make_v4_ss_kv_from_tc (&kv4, tc); kv4.value = value; clib_bihash_add_del_16_8 (&smm->v4_session_hash, &kv4, 1 /* is_add */ ); break; case SESSION_TYPE_IP6_UDP: case SESSION_TYPE_IP6_TCP: make_v6_ss_kv_from_tc (&kv6, tc); kv6.value = value; clib_bihash_add_del_48_8 (&smm->v6_session_hash, &kv6, 1 /* is_add */ ); break; default: clib_warning ("Session type not supported"); ASSERT (0); } } void stream_session_table_add (session_manager_main_t * smm, stream_session_t * s, u64 value) { transport_connection_t *tc; tc = tp_vfts[s->session_type].get_connection (s->connection_index, s->thread_index); stream_session_table_add_for_tc (tc, value); } static void stream_session_half_open_table_add (session_type_t sst, transport_connection_t * tc, u64 value) { session_manager_main_t *smm = &session_manager_main; session_kv4_t kv4; session_kv6_t kv6; switch (sst) { case SESSION_TYPE_IP4_UDP: case SESSION_TYPE_IP4_TCP: make_v4_ss_kv_from_tc (&kv4, tc); kv4.value = value; clib_bihash_add_del_16_8 (&smm->v4_half_open_hash, &kv4, 1 /* is_add */ ); break; case SESSION_TYPE_IP6_UDP: case SESSION_TYPE_IP6_TCP: make_v6_ss_kv_from_tc (&kv6, tc); kv6.value = value; clib_bihash_add_del_48_8 (&smm->v6_half_open_hash, &kv6, 1 /* is_add */ ); break; default: clib_warning ("Session type not supported"); ASSERT (0); } } int stream_session_table_del_for_tc (transport_connection_t * tc) { session_manager_main_t *smm = &session_manager_main; session_kv4_t kv4; session_kv6_t kv6; switch (tc->proto) { case SESSION_TYPE_IP4_UDP: case SESSION_TYPE_IP4_TCP: make_v4_ss_kv_from_tc (&kv4, tc); return clib_bihash_add_del_16_8 (&smm->v4_session_hash, &kv4, 0 /* is_add */ ); break; case SESSION_TYPE_IP6_UDP: case SESSION_TYPE_IP6_TCP: make_v6_ss_kv_from_tc (&kv6, tc); return clib_bihash_add_del_48_8 (&smm->v6_session_hash, &kv6, 0 /* is_add */ ); break; default: clib_warning ("Session type not supported"); ASSERT (0); } return 0; } static int stream_session_table_del (session_manager_main_t * smm, stream_session_t * s) { transport_connection_t *ts; ts = tp_vfts[s->session_type].get_connection (s->connection_index, s->thread_index); return stream_session_table_del_for_tc (ts); } static void stream_session_half_open_table_del (session_manager_main_t * smm, u8 sst, transport_connection_t * tc) { session_kv4_t kv4; session_kv6_t kv6; switch (sst) { case SESSION_TYPE_IP4_UDP: case SESSION_TYPE_IP4_TCP: make_v4_ss_kv_from_tc (&kv4, tc); clib_bihash_add_del_16_8 (&smm->v4_half_open_hash, &kv4, 0 /* is_add */ ); break; case SESSION_TYPE_IP6_UDP: case SESSION_TYPE_IP6_TCP: make_v6_ss_kv_from_tc (&kv6, tc); clib_bihash_add_del_48_8 (&smm->v6_half_open_hash, &kv6, 0 /* is_add */ ); break; default: clib_warning ("Session type not supported"); ASSERT (0); } } stream_session_t * stream_session_lookup_listener4 (ip4_address_t * lcl, u16 lcl_port, u8 proto) { session_manager_main_t *smm = &session_manager_main; session_kv4_t kv4; int rv; make_v4_listener_kv (&kv4, lcl, lcl_port, proto); rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4); if (rv == 0) return pool_elt_at_index (smm->listen_sessions[proto], (u32) kv4.value); /* Zero out the lcl ip */ kv4.key[0] = 0; rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4); if (rv == 0) return pool_elt_at_index (smm->listen_sessions[proto], kv4.value); return 0; } /** Looks up a session based on the 5-tuple passed as argument. * * First it tries to find an established session, if this fails, it tries * finding a listener session if this fails, it tries a lookup with a * wildcarded local source (listener bound to all interfaces) */ stream_session_t * stream_session_lookup4 (ip4_address_t * lcl, ip4_address_t * rmt, u16 lcl_port, u16 rmt_port, u8 proto, u32 my_thread_index) { session_manager_main_t *smm = &session_manager_main; session_kv4_t kv4; int rv; /* Lookup session amongst established ones */ make_v4_ss_kv (&kv4, lcl, rmt, lcl_port, rmt_port, proto); rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4); if (rv == 0) return stream_session_get_tsi (kv4.value, my_thread_index); /* If nothing is found, check if any listener is available */ return stream_session_lookup_listener4 (lcl, lcl_port, proto); } stream_session_t * stream_session_lookup_listener6 (ip6_address_t * lcl, u16 lcl_port, u8 proto) { session_manager_main_t *smm = &session_manager_main; session_kv6_t kv6; int rv; make_v6_listener_kv (&kv6, lcl, lcl_port, proto); rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6); if (rv == 0) return pool_elt_at_index (smm->listen_sessions[proto], kv6.value); /* Zero out the lcl ip */ kv6.key[0] = kv6.key[1] = 0; rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6); if (rv == 0) return pool_elt_at_index (smm->listen_sessions[proto], kv6.value); return 0; } /* Looks up a session based on the 5-tuple passed as argument. * First it tries to find an established session, if this fails, it tries * finding a listener session if this fails, it tries a lookup with a * wildcarded local source (listener bound to all interfaces) */ stream_session_t * stream_session_lookup6 (ip6_address_t * lcl, ip6_address_t * rmt, u16 lcl_port, u16 rmt_port, u8 proto, u32 my_thread_index) { session_manager_main_t *smm = vnet_get_session_manager_main (); session_kv6_t kv6; int rv; make_v6_ss_kv (&kv6, lcl, rmt, lcl_port, rmt_port, proto); rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6); if (rv == 0) return stream_session_get_tsi (kv6.value, my_thread_index); /* If nothing is found, check if any listener is available */ return stream_session_lookup_listener6 (lcl, lcl_port, proto); } stream_session_t * stream_session_lookup_listener (ip46_address_t * lcl, u16 lcl_port, u8 proto) { switch (proto) { case SESSION_TYPE_IP4_UDP: case SESSION_TYPE_IP4_TCP: return stream_session_lookup_listener4 (&lcl->ip4, lcl_port, proto); break; case SESSION_TYPE_IP6_UDP: case SESSION_TYPE_IP6_TCP: return stream_session_lookup_listener6 (&lcl->ip6, lcl_port, proto); break; } return 0; } static u64 stream_session_half_open_lookup (session_manager_main_t * smm, ip46_address_t * lcl, ip46_address_t * rmt, u16 lcl_port, u16 rmt_port, u8 proto) { session_kv4_t kv4; session_kv6_t kv6; int rv; switch (proto) { case SESSION_TYPE_IP4_UDP: case SESSION_TYPE_IP4_TCP: make_v4_ss_kv (&kv4, &lcl->ip4, &rmt->ip4, lcl_port, rmt_port, proto); rv = clib_bihash_search_inline_16_8 (&smm->v4_half_open_hash, &kv4); if (rv == 0) return kv4.value; return (u64) ~ 0; break; case SESSION_TYPE_IP6_UDP: case SESSION_TYPE_IP6_TCP: make_v6_ss_kv (&kv6, &lcl->ip6, &rmt->ip6, lcl_port, rmt_port, proto); rv = clib_bihash_search_inline_48_8 (&smm->v6_half_open_hash, &kv6); if (rv == 0) return kv6.value; return (u64) ~ 0; break; } return 0; } transport_connection_t * stream_session_lookup_transport4 (ip4_address_t * lcl, ip4_address_t * rmt, u16 lcl_port, u16 rmt_port, u8 proto, u32 my_thread_index) { session_manager_main_t *smm = &session_manager_main; session_kv4_t kv4; stream_session_t *s; int rv; /* Lookup session amongst established ones */ make_v4_ss_kv (&kv4, lcl, rmt, lcl_port, rmt_port, proto); rv = clib_bihash_search_inline_16_8 (&smm->v4_session_hash, &kv4); if (rv == 0) { s = stream_session_get_tsi (kv4.value, my_thread_index); return tp_vfts[s->session_type].get_connection (s->connection_index, my_thread_index); } /* If nothing is found, check if any listener is available */ s = stream_session_lookup_listener4 (lcl, lcl_port, proto); if (s) return tp_vfts[s->session_type].get_listener (s->connection_index); /* Finally, try half-open connections */ rv = clib_bihash_search_inline_16_8 (&smm->v4_half_open_hash, &kv4); if (rv == 0) return tp_vfts[proto].get_half_open (kv4.value & 0xFFFFFFFF); return 0; } transport_connection_t * stream_session_lookup_transport6 (ip6_address_t * lcl, ip6_address_t * rmt, u16 lcl_port, u16 rmt_port, u8 proto, u32 my_thread_index) { session_manager_main_t *smm = &session_manager_main; stream_session_t *s; session_kv6_t kv6; int rv; make_v6_ss_kv (&kv6, lcl, rmt, lcl_port, rmt_port, proto); rv = clib_bihash_search_inline_48_8 (&smm->v6_session_hash, &kv6); if (rv == 0) { s = stream_session_get_tsi (kv6.value, my_thread_index); return tp_vfts[s->session_type].get_connection (s->connection_index, my_thread_index); } /* If nothing is found, check if any listener is available */ s = stream_session_lookup_listener6 (lcl, lcl_port, proto); if (s) return tp_vfts[s->session_type].get_listener (s->connection_index); /* Finally, try half-open connections */ rv = clib_bihash_search_inline_48_8 (&smm->v6_half_open_hash, &kv6); if (rv == 0) return tp_vfts[proto].get_half_open (kv6.value & 0xFFFFFFFF); return 0; } int stream_session_create_i (segment_manager_t * sm, transport_connection_t * tc, stream_session_t ** ret_s) { session_manager_main_t *smm = &session_manager_main; svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0; u32 fifo_segment_index; u32 pool_index; stream_session_t *s; u64 value; u32 thread_index = tc->thread_index; int rv; if ((rv = segment_manager_alloc_session_fifos (sm, &server_rx_fifo, &server_tx_fifo, &fifo_segment_index))) return rv; /* Create the session */ pool_get (smm->sessions[thread_index], s); memset (s, 0, sizeof (*s)); /* Initialize backpointers */ pool_index = s - smm->sessions[thread_index]; server_rx_fifo->master_session_index = pool_index; server_rx_fifo->master_thread_index = thread_index; server_tx_fifo->master_session_index = pool_index; server_tx_fifo->master_thread_index = thread_index; s->server_rx_fifo = server_rx_fifo; s->server_tx_fifo = server_tx_fifo; /* Initialize state machine, such as it is... */ s->session_type = tc->proto; s->session_state = SESSION_STATE_CONNECTING; s->svm_segment_index = fifo_segment_index; s->thread_index = thread_index; s->session_index = pool_index; /* Attach transport to session */ s->connection_index = tc->c_index; /* Attach session to transport */ tc->s_index = s->session_index; /* Add to the main lookup table */ value = (((u64) thread_index) << 32) | (u64) s->session_index; stream_session_table_add_for_tc (tc, value); *ret_s = s; return 0; } /** Enqueue buffer chain tail */ always_inline int session_enqueue_chain_tail (stream_session_t * s, vlib_buffer_t * b, u32 offset, u8 is_in_order) { vlib_buffer_t *chain_b; u32 chain_bi = b->next_buffer; vlib_main_t *vm = vlib_get_main (); u8 *data, len; u16 written = 0; int rv = 0; do { chain_b = vlib_get_buffer (vm, chain_bi); data = vlib_buffer_get_current (chain_b); len = chain_b->current_length; if (is_in_order) { rv = svm_fifo_enqueue_nowait (s->server_rx_fifo, len, data); if (rv < len) { return (rv > 0) ? (written + rv) : written; } written += rv; } else { rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset, len, data); if (rv) 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; } /* * Enqueue data for delivery to session peer. Does not notify peer of enqueue * event but on request can queue notification events for later delivery by * calling stream_server_flush_enqueue_events(). * * @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 stream_session_enqueue_data (transport_connection_t * tc, vlib_buffer_t * b, u32 offset, u8 queue_event, u8 is_in_order) { stream_session_t *s; int enqueued = 0, rv; s = stream_session_get (tc->s_index, tc->thread_index); if (is_in_order) { enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo, b->current_length, vlib_buffer_get_current (b)); if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued > 0)) { rv = session_enqueue_chain_tail (s, b, 0, 1); if (rv <= 0) return enqueued; enqueued += rv; } } else { rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset, b->current_length, vlib_buffer_get_current (b)); if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv)) rv = session_enqueue_chain_tail (s, b, offset + b->current_length, 0); if (rv) return -1; } if (queue_event) { /* Queue RX event on this fifo. Eventually these will need to be flushed * by calling stream_server_flush_enqueue_events () */ session_manager_main_t *smm = vnet_get_session_manager_main (); u32 thread_index = s->thread_index; u32 my_enqueue_epoch = smm->current_enqueue_epoch[thread_index]; if (s->enqueue_epoch != my_enqueue_epoch) { s->enqueue_epoch = my_enqueue_epoch; vec_add1 (smm->session_indices_to_enqueue_by_thread[thread_index], s - smm->sessions[thread_index]); } } if (is_in_order) return enqueued; return 0; } /** Check if we have space in rx fifo to push more bytes */ u8 stream_session_no_space (transport_connection_t * tc, u32 thread_index, u16 data_len) { stream_session_t *s = stream_session_get (tc->c_index, thread_index); if (PREDICT_FALSE (s->session_state != SESSION_STATE_READY)) return 1; if (data_len > svm_fifo_max_enqueue (s->server_rx_fifo)) return 1; return 0; } u32 stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer, u32 offset, u32 max_bytes) { stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index); return svm_fifo_peek (s->server_tx_fifo, offset, max_bytes, buffer); } u32 stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes) { stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index); return svm_fifo_dequeue_drop (s->server_tx_fifo, max_bytes); } /** * Notify session peer that new data has been enqueued. * * @param s Stream session for which the event is to be generated. * @param block Flag to indicate if call should block if event queue is full. * * @return 0 on succes or negative number if failed to send notification. */ static int stream_session_enqueue_notify (stream_session_t * s, u8 block) { application_t *app; session_fifo_event_t evt; unix_shared_memory_queue_t *q; static u32 serial_number; if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED)) return 0; /* Get session's server */ app = application_get (s->app_index); /* Built-in server? Hand event to the callback... */ if (app->cb_fns.builtin_server_rx_callback) return app->cb_fns.builtin_server_rx_callback (s); /* If no event, send one */ if (svm_fifo_set_event (s->server_rx_fifo)) { /* Fabricate event */ evt.fifo = s->server_rx_fifo; evt.event_type = FIFO_EVENT_APP_RX; evt.event_id = serial_number++; /* Add event to server's event queue */ q = app->event_queue; /* Based on request block (or not) for lack of space */ if (block || PREDICT_TRUE (q->cursize < q->maxsize)) unix_shared_memory_queue_add (app->event_queue, (u8 *) & evt, 0 /* do wait for mutex */ ); else { clib_warning ("fifo full"); return -1; } } /* *INDENT-OFF* */ SESSION_EVT_DBG(SESSION_EVT_ENQ, s, ({ ed->data[0] = evt.event_id; ed->data[1] = svm_fifo_max_dequeue (s->server_rx_fifo); })); /* *INDENT-ON* */ return 0; } /** * Flushes queue of sessions that are to be notified of new data * enqueued events. * * @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. */ int session_manager_flush_enqueue_events (u32 thread_index) { session_manager_main_t *smm = &session_manager_main; u32 *session_indices_to_enqueue; int i, errors = 0; session_indices_to_enqueue = smm->session_indices_to_enqueue_by_thread[thread_index]; for (i = 0; i < vec_len (session_indices_to_enqueue); i++) { stream_session_t *s0; /* Get session */ s0 = stream_session_get (session_indices_to_enqueue[i], thread_index); if (stream_session_enqueue_notify (s0, 0 /* don't block */ )) { errors++; } } vec_reset_length (session_indices_to_enqueue); smm->session_indices_to_enqueue_by_thread[thread_index] = session_indices_to_enqueue; /* Increment enqueue epoch for next round */ smm->current_enqueue_epoch[thread_index]++; return errors; } /** * Init fifo tail and head pointers * * Useful if transport uses absolute offsets for tracking ooo segments. */ void stream_session_init_fifos_pointers (transport_connection_t * tc, u32 rx_pointer, u32 tx_pointer) { stream_session_t *s; s = stream_session_get (tc->s_index, tc->thread_index); svm_fifo_init_pointers (s->server_rx_fifo, rx_pointer); svm_fifo_init_pointers (s->server_tx_fifo, tx_pointer); } void stream_session_connect_notify (transport_connection_t * tc, u8 sst, u8 is_fail) { session_manager_main_t *smm = &session_manager_main; application_t *app; stream_session_t *new_s = 0; u64 handle; u32 api_context = 0; handle = stream_session_half_open_lookup (smm, &tc->lcl_ip, &tc->rmt_ip, tc->lcl_port, tc->rmt_port, tc->proto); if (handle == HALF_OPEN_LOOKUP_INVALID_VALUE) { clib_warning ("This can't be good!"); return; } /* Get the app's index from the handle we stored when opening connection */ app = application_get (handle >> 32); api_context = tc->s_index; if (!is_fail) { segment_manager_t *sm; sm = application_get_connect_segment_manager (app); /* Create new session (svm segments are allocated if needed) */ if (stream_session_create_i (sm, tc, &new_s)) return; new_s->app_index = app->index; } /* Notify client */ app->cb_fns.session_connected_callback (app->index, api_context, new_s, is_fail); /* Cleanup session lookup */ stream_session_half_open_table_del (smm, sst, tc); } void stream_session_accept_notify (transport_connection_t * tc) { application_t *server; stream_session_t *s; s = stream_session_get (tc->s_index, tc->thread_index); server = application_get (s->app_index); server->cb_fns.session_accept_callback (s); } /** * 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 stream_session_disconnect_notify (transport_connection_t * tc) { application_t *server; stream_session_t *s; s = stream_session_get (tc->s_index, tc->thread_index); server = application_get (s->app_index); server->cb_fns.session_disconnect_callback (s); } /** * Cleans up session and associated app if needed. */ void stream_session_delete (stream_session_t * s) { session_manager_main_t *smm = vnet_get_session_manager_main (); /* Delete from the main lookup table. */ stream_session_table_del (smm, s); /* Cleanup fifo segments */ segment_manager_dealloc_fifos (s->svm_segment_index, s->server_rx_fifo, s->server_tx_fifo); pool_put (smm->sessions[s->thread_index], s); } /** * Notification from transport that connection is being deleted * * This 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 stream_session_delete_notify (transport_connection_t * tc) { stream_session_t *s; /* App might've been removed already */ s = stream_session_get_if_valid (tc->s_index, tc->thread_index); if (!s) { return; } stream_session_delete (s); } /** * Notify application that connection has been reset. */ void stream_session_reset_notify (transport_connection_t * tc) { stream_session_t *s; application_t *app; s = stream_session_get (tc->s_index, tc->thread_index); app = application_get (s->app_index); app->cb_fns.session_reset_callback (s); } /** * Accept a stream session. Optionally ping the server by callback. */ int stream_session_accept (transport_connection_t * tc, u32 listener_index, u8 sst, u8 notify) { application_t *server; stream_session_t *s, *listener; segment_manager_t *sm; int rv; /* Find the server */ listener = listen_session_get (sst, listener_index); server = application_get (listener->app_index); sm = application_get_listen_segment_manager (server, listener); if ((rv = stream_session_create_i (sm, tc, &s))) return rv; s->app_index = server->index; s->listener_index = listener_index; /* Shoulder-tap the server */ if (notify) { server->cb_fns.session_accept_callback (s); } return 0; } /** * 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 res Resulting transport connection . */ int stream_session_open (u32 app_index, session_type_t st, transport_endpoint_t * tep, transport_connection_t ** res) { transport_connection_t *tc; int rv; u64 handle; rv = tp_vfts[st].open (&tep->ip, tep->port); if (rv < 0) { clib_warning ("Transport failed to open connection."); return VNET_API_ERROR_SESSION_CONNECT_FAIL; } tc = tp_vfts[st].get_half_open ((u32) rv); /* Save app and tc index. The latter is needed to help establish the * connection while the former is needed when the connect notify comes * and we have to notify the external app */ handle = (((u64) app_index) << 32) | (u64) tc->c_index; /* Add to the half-open lookup table */ stream_session_half_open_table_add (st, tc, handle); *res = tc; return 0; } /** * Ask transport to listen on local transport endpoint. * * @param s Session for which listen will be called. Note that unlike * established sessions, listen sessions are not associated to a * thread. * @param tep Local endpoint to be listened on. */ int stream_session_listen (stream_session_t * s, transport_endpoint_t * tep) { transport_connection_t *tc; u32 tci; /* Transport bind/listen */ tci = tp_vfts[s->session_type].bind (s->session_index, &tep->ip, tep->port); if (tci == (u32) ~ 0) return -1; /* Attach transport to session */ s->connection_index = tci; tc = tp_vfts[s->session_type].get_listener (tci); /* Weird but handle it ... */ if (tc == 0) return -1; /* Add to the main lookup table */ stream_session_table_add_for_tc (tc, s->session_index); 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 stream_session_stop_listen (stream_session_t * s) { transport_connection_t *tc; if (s->session_state != SESSION_STATE_LISTENING) { clib_warning ("not a listening session"); return -1; } tc = tp_vfts[s->session_type].get_listener (s->connection_index); if (!tc) { clib_warning ("no transport"); return VNET_API_ERROR_ADDRESS_NOT_IN_USE; } stream_session_table_del_for_tc (tc); tp_vfts[s->session_type].unbind (s->connection_index); return 0; } void session_send_session_evt_to_thread (u64 session_handle, fifo_event_type_t evt_type, u32 thread_index) { static u16 serial_number = 0; session_fifo_event_t evt; unix_shared_memory_queue_t *q; /* Fabricate event */ evt.session_handle = session_handle; evt.event_type = evt_type; evt.event_id = serial_number++; q = session_manager_get_vpp_event_queue (thread_index); /* Based on request block (or not) for lack of space */ if (PREDICT_TRUE (q->cursize < q->maxsize)) unix_shared_memory_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ ); else { clib_warning ("queue full"); return; } } /** * Disconnect session and propagate to transport. This should eventually * result in a delete notification that allows us to cleanup session state. * Called for both active/passive disconnects. * * Should be called from the session's thread. */ void stream_session_disconnect (stream_session_t * s) { s->session_state = SESSION_STATE_CLOSED; tp_vfts[s->session_type].close (s->connection_index, s->thread_index); } /** * Cleanup transport and session state. * * Notify transport of the cleanup, wait for a delete notify to actually * remove the session state. */ void stream_session_cleanup (stream_session_t * s) { session_manager_main_t *smm = &session_manager_main; int rv; s->session_state = SESSION_STATE_CLOSED; /* Delete from the main lookup table to avoid more enqueues */ rv = stream_session_table_del (smm, s); if (rv) clib_warning ("hash delete error, rv %d", rv); tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index); } void session_register_transport (u8 type, const transport_proto_vft_t * vft) { session_manager_main_t *smm = vnet_get_session_manager_main (); vec_validate (tp_vfts, type); tp_vfts[type] = *vft; /* If an offset function is provided, then peek instead of dequeue */ smm->session_tx_fns[type] = (vft->tx_fifo_offset) ? session_tx_fifo_peek_and_snd : session_tx_fifo_dequeue_and_snd; } transport_proto_vft_t * session_get_transport_vft (u8 type) { if (type >= vec_len (tp_vfts)) return 0; return &tp_vfts[type]; } /** * Allocate vpp event queue (once) per worker thread */ void session_vpp_event_queue_allocate (session_manager_main_t * smm, u32 thread_index) { api_main_t *am = &api_main; void *oldheap; if (smm->vpp_event_queues[thread_index] == 0) { /* Allocate event fifo in the /vpe-api shared-memory segment */ oldheap = svm_push_data_heap (am->vlib_rp); smm->vpp_event_queues[thread_index] = unix_shared_memory_queue_init (2048 /* nels $$$$ config */ , sizeof (session_fifo_event_t), 0 /* consumer pid */ , 0 /* (do not) send signal when queue non-empty */ ); svm_pop_heap (oldheap); } } static clib_error_t * session_manager_main_enable (vlib_main_t * vm) { session_manager_main_t *smm = &session_manager_main; vlib_thread_main_t *vtm = vlib_get_thread_main (); u32 num_threads; int i; num_threads = 1 /* main thread */ + vtm->n_threads; if (num_threads < 1) return clib_error_return (0, "n_thread_stacks not set"); /* $$$ config parameters */ svm_fifo_segment_init (0x200000000ULL /* first segment base VA */ , 20 /* timeout in seconds */ ); /* configure per-thread ** vectors */ vec_validate (smm->sessions, num_threads - 1); vec_validate (smm->session_indices_to_enqueue_by_thread, num_threads - 1); vec_validate (smm->tx_buffers, num_threads - 1); vec_validate (smm->fifo_events, num_threads - 1); vec_validate (smm->evts_partially_read, num_threads - 1); vec_validate (smm->current_enqueue_epoch, num_threads - 1); vec_validate (smm->vpp_event_queues, num_threads - 1); #if SESSION_DBG vec_validate (smm->last_event_poll_by_thread, num_threads - 1); #endif /* Allocate vpp event queues */ for (i = 0; i < vec_len (smm->vpp_event_queues); i++) session_vpp_event_queue_allocate (smm, i); /* $$$$ preallocate hack config parameter */ for (i = 0; i < 200000; i++) { stream_session_t *ss; pool_get (smm->sessions[0], ss); memset (ss, 0, sizeof (*ss)); } for (i = 0; i < 200000; i++) pool_put_index (smm->sessions[0], i); clib_bihash_init_16_8 (&smm->v4_session_hash, "v4 session table", 200000 /* $$$$ config parameter nbuckets */ , (64 << 20) /*$$$ config parameter table size */ ); clib_bihash_init_48_8 (&smm->v6_session_hash, "v6 session table", 200000 /* $$$$ config parameter nbuckets */ , (64 << 20) /*$$$ config parameter table size */ ); clib_bihash_init_16_8 (&smm->v4_half_open_hash, "v4 half-open table", 200000 /* $$$$ config parameter nbuckets */ , (64 << 20) /*$$$ config parameter table size */ ); clib_bihash_init_48_8 (&smm->v6_half_open_hash, "v6 half-open table", 200000 /* $$$$ config parameter nbuckets */ , (64 << 20) /*$$$ config parameter table size */ ); smm->is_enabled = 1; /* Enable TCP transport */ vnet_tcp_enable_disable (vm, 1); return 0; } void session_node_enable_disable (u8 is_en) { u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED; /* *INDENT-OFF* */ foreach_vlib_main (({ vlib_node_set_state (this_vlib_main, session_queue_node.index, state); })); /* *INDENT-ON* */ } clib_error_t * vnet_session_enable_disable (vlib_main_t * vm, u8 is_en) { if (is_en) { if (session_manager_main.is_enabled) return 0; session_node_enable_disable (is_en); return session_manager_main_enable (vm); } else { session_manager_main.is_enabled = 0; session_node_enable_disable (is_en); } return 0; } clib_error_t * session_manager_main_init (vlib_main_t * vm) { session_manager_main_t *smm = &session_manager_main; smm->vlib_main = vm; smm->vnet_main = vnet_get_main (); smm->is_enabled = 0; return 0; } VLIB_INIT_FUNCTION (session_manager_main_init) /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */