| /* |
| * Copyright (c) 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 <vnet/session/application_local.h> |
| #include <vnet/session/session.h> |
| |
| typedef struct ct_main_ |
| { |
| ct_connection_t **connections; /**< Per-worker connection pools */ |
| u32 n_workers; /**< Number of vpp workers */ |
| u32 n_sessions; /**< Cumulative sessions counter */ |
| } ct_main_t; |
| |
| static ct_main_t ct_main; |
| |
| static ct_connection_t * |
| ct_connection_alloc (u32 thread_index) |
| { |
| ct_connection_t *ct; |
| |
| pool_get_zero (ct_main.connections[thread_index], ct); |
| ct->c_c_index = ct - ct_main.connections[thread_index]; |
| ct->c_thread_index = thread_index; |
| ct->client_wrk = ~0; |
| ct->server_wrk = ~0; |
| return ct; |
| } |
| |
| static ct_connection_t * |
| ct_connection_get (u32 ct_index, u32 thread_index) |
| { |
| if (pool_is_free_index (ct_main.connections[thread_index], ct_index)) |
| return 0; |
| return pool_elt_at_index (ct_main.connections[thread_index], ct_index); |
| } |
| |
| static void |
| ct_connection_free (ct_connection_t * ct) |
| { |
| if (CLIB_DEBUG) |
| { |
| u32 thread_index = ct->c_thread_index; |
| memset (ct, 0xfc, sizeof (*ct)); |
| pool_put (ct_main.connections[thread_index], ct); |
| return; |
| } |
| pool_put (ct_main.connections[ct->c_thread_index], ct); |
| } |
| |
| session_t * |
| ct_session_get_peer (session_t * s) |
| { |
| ct_connection_t *ct, *peer_ct; |
| ct = ct_connection_get (s->connection_index, s->thread_index); |
| peer_ct = ct_connection_get (ct->peer_index, s->thread_index); |
| return session_get (peer_ct->c_s_index, s->thread_index); |
| } |
| |
| void |
| ct_session_endpoint (session_t * ll, session_endpoint_t * sep) |
| { |
| ct_connection_t *ct; |
| ct = (ct_connection_t *) session_get_transport (ll); |
| sep->transport_proto = ct->actual_tp; |
| sep->port = ct->c_lcl_port; |
| sep->is_ip4 = ct->c_is_ip4; |
| ip_copy (&sep->ip, &ct->c_lcl_ip, ct->c_is_ip4); |
| } |
| |
| int |
| ct_session_connect_notify (session_t * ss) |
| { |
| u32 ss_index, opaque, thread_index; |
| ct_connection_t *sct, *cct; |
| app_worker_t *client_wrk; |
| segment_manager_t *sm; |
| fifo_segment_t *seg; |
| u64 segment_handle; |
| int err = 0; |
| session_t *cs; |
| |
| ss_index = ss->session_index; |
| thread_index = ss->thread_index; |
| sct = (ct_connection_t *) session_get_transport (ss); |
| client_wrk = app_worker_get (sct->client_wrk); |
| opaque = sct->client_opaque; |
| |
| sm = segment_manager_get (ss->rx_fifo->segment_manager); |
| seg = segment_manager_get_segment_w_lock (sm, ss->rx_fifo->segment_index); |
| segment_handle = segment_manager_segment_handle (sm, seg); |
| |
| if ((err = app_worker_add_segment_notify (client_wrk, segment_handle))) |
| { |
| clib_warning ("failed to notify client %u of new segment", |
| sct->client_wrk); |
| segment_manager_segment_reader_unlock (sm); |
| session_close (ss); |
| goto error; |
| } |
| else |
| { |
| segment_manager_segment_reader_unlock (sm); |
| } |
| |
| /* Alloc client session */ |
| cct = ct_connection_get (sct->peer_index, thread_index); |
| |
| cs = session_alloc (thread_index); |
| ss = session_get (ss_index, thread_index); |
| cs->session_type = ss->session_type; |
| cs->listener_handle = SESSION_INVALID_HANDLE; |
| cs->session_state = SESSION_STATE_CONNECTING; |
| cs->app_wrk_index = client_wrk->wrk_index; |
| cs->connection_index = cct->c_c_index; |
| |
| cct->c_s_index = cs->session_index; |
| cct->client_rx_fifo = ss->tx_fifo; |
| cct->client_tx_fifo = ss->rx_fifo; |
| |
| cct->client_rx_fifo->refcnt++; |
| cct->client_tx_fifo->refcnt++; |
| |
| /* This will allocate fifos for the session. They won't be used for |
| * exchanging data but they will be used to close the connection if |
| * the segment manager/worker is freed */ |
| if ((err = app_worker_init_connected (client_wrk, cs))) |
| { |
| session_close (ss); |
| session_free (cs); |
| goto error; |
| } |
| |
| cs->session_state = SESSION_STATE_CONNECTING; |
| |
| if (app_worker_connect_notify (client_wrk, cs, err, opaque)) |
| { |
| session_close (ss); |
| segment_manager_dealloc_fifos (cs->rx_fifo, cs->tx_fifo); |
| session_free (cs); |
| return -1; |
| } |
| |
| cs = session_get (cct->c_s_index, cct->c_thread_index); |
| cs->session_state = SESSION_STATE_READY; |
| |
| return 0; |
| |
| error: |
| app_worker_connect_notify (client_wrk, 0, err, opaque); |
| return -1; |
| } |
| |
| static int |
| ct_init_accepted_session (app_worker_t * server_wrk, |
| ct_connection_t * ct, session_t * ls, |
| session_t * ll) |
| { |
| u32 round_rx_fifo_sz, round_tx_fifo_sz, sm_index, seg_size; |
| segment_manager_props_t *props; |
| application_t *server; |
| segment_manager_t *sm; |
| u32 margin = 16 << 10; |
| fifo_segment_t *seg; |
| u64 segment_handle; |
| int seg_index, rv; |
| |
| server = application_get (server_wrk->app_index); |
| |
| props = application_segment_manager_properties (server); |
| round_rx_fifo_sz = 1 << max_log2 (props->rx_fifo_size); |
| round_tx_fifo_sz = 1 << max_log2 (props->tx_fifo_size); |
| /* Increase size because of inefficient chunk allocations. Depending on |
| * how data is consumed, it may happen that more chunks than needed are |
| * allocated. |
| * TODO should remove once allocations are done more efficiently */ |
| seg_size = 4 * (round_rx_fifo_sz + round_tx_fifo_sz + margin); |
| |
| sm = app_worker_get_listen_segment_manager (server_wrk, ll); |
| seg_index = segment_manager_add_segment (sm, seg_size); |
| if (seg_index < 0) |
| { |
| clib_warning ("failed to add new cut-through segment"); |
| return seg_index; |
| } |
| seg = segment_manager_get_segment_w_lock (sm, seg_index); |
| |
| rv = segment_manager_try_alloc_fifos (seg, ls->thread_index, |
| props->rx_fifo_size, |
| props->tx_fifo_size, &ls->rx_fifo, |
| &ls->tx_fifo); |
| if (rv) |
| { |
| clib_warning ("failed to add fifos in cut-through segment"); |
| segment_manager_segment_reader_unlock (sm); |
| goto failed; |
| } |
| |
| sm_index = segment_manager_index (sm); |
| ls->rx_fifo->master_session_index = ls->session_index; |
| ls->tx_fifo->master_session_index = ls->session_index; |
| ls->rx_fifo->master_thread_index = ls->thread_index; |
| ls->tx_fifo->master_thread_index = ls->thread_index; |
| ls->rx_fifo->segment_manager = sm_index; |
| ls->tx_fifo->segment_manager = sm_index; |
| ls->rx_fifo->segment_index = seg_index; |
| ls->tx_fifo->segment_index = seg_index; |
| |
| /* Disable ooo lookups on the cut-through fifos. TODO remove once init of |
| * chunk lookup rbtrees is delegated to transports */ |
| svm_fifo_free_chunk_lookup (ls->tx_fifo); |
| |
| segment_handle = segment_manager_segment_handle (sm, seg); |
| if ((rv = app_worker_add_segment_notify (server_wrk, segment_handle))) |
| { |
| clib_warning ("failed to notify server of new segment"); |
| segment_manager_segment_reader_unlock (sm); |
| goto failed; |
| } |
| segment_manager_segment_reader_unlock (sm); |
| ct->segment_handle = segment_handle; |
| |
| return 0; |
| |
| failed: |
| segment_manager_lock_and_del_segment (sm, seg_index); |
| return rv; |
| } |
| |
| typedef struct ct_accept_rpc_args |
| { |
| u32 ll_s_index; |
| u32 thread_index; |
| ip46_address_t ip; |
| u16 port; |
| u8 is_ip4; |
| u32 opaque; |
| u32 client_wrk_index; |
| } ct_accept_rpc_args_t; |
| |
| static void |
| ct_accept_rpc_wrk_handler (void *accept_args) |
| { |
| ct_accept_rpc_args_t *args = (ct_accept_rpc_args_t *) accept_args; |
| ct_connection_t *sct, *cct, *ll_ct; |
| app_worker_t *server_wrk; |
| session_t *ss, *ll; |
| u32 cct_index; |
| |
| ll = listen_session_get (args->ll_s_index); |
| |
| cct = ct_connection_alloc (args->thread_index); |
| cct_index = cct->c_c_index; |
| sct = ct_connection_alloc (args->thread_index); |
| ll_ct = ct_connection_get (ll->connection_index, 0 /* listener thread */ ); |
| |
| /* |
| * Alloc and init client transport |
| */ |
| cct = ct_connection_get (cct_index, args->thread_index); |
| cct->c_rmt_port = args->port; |
| cct->c_lcl_port = 0; |
| cct->c_is_ip4 = args->is_ip4; |
| clib_memcpy (&cct->c_rmt_ip, &args->ip, sizeof (args->ip)); |
| cct->actual_tp = ll_ct->actual_tp; |
| cct->is_client = 1; |
| cct->c_s_index = ~0; |
| |
| /* |
| * Init server transport |
| */ |
| sct->c_rmt_port = 0; |
| sct->c_lcl_port = ll_ct->c_lcl_port; |
| sct->c_is_ip4 = args->is_ip4; |
| clib_memcpy (&sct->c_lcl_ip, &ll_ct->c_lcl_ip, sizeof (ll_ct->c_lcl_ip)); |
| sct->client_wrk = args->client_wrk_index; |
| sct->c_proto = TRANSPORT_PROTO_NONE; |
| sct->client_opaque = args->opaque; |
| sct->actual_tp = ll_ct->actual_tp; |
| |
| sct->peer_index = cct->c_c_index; |
| cct->peer_index = sct->c_c_index; |
| |
| /* |
| * Accept server session. Client session is created only after |
| * server confirms accept. |
| */ |
| ss = session_alloc (args->thread_index); |
| ll = listen_session_get (args->ll_s_index); |
| ss->session_type = session_type_from_proto_and_ip (TRANSPORT_PROTO_NONE, |
| sct->c_is_ip4); |
| ss->connection_index = sct->c_c_index; |
| ss->listener_handle = listen_session_get_handle (ll); |
| ss->session_state = SESSION_STATE_CREATED; |
| |
| server_wrk = application_listener_select_worker (ll); |
| ss->app_wrk_index = server_wrk->wrk_index; |
| |
| sct->c_s_index = ss->session_index; |
| sct->server_wrk = ss->app_wrk_index; |
| |
| if (ct_init_accepted_session (server_wrk, sct, ss, ll)) |
| { |
| ct_connection_free (sct); |
| session_free (ss); |
| return; |
| } |
| |
| ss->session_state = SESSION_STATE_ACCEPTING; |
| if (app_worker_accept_notify (server_wrk, ss)) |
| { |
| ct_connection_free (sct); |
| segment_manager_dealloc_fifos (ss->rx_fifo, ss->tx_fifo); |
| session_free (ss); |
| return; |
| } |
| |
| cct->segment_handle = sct->segment_handle; |
| |
| clib_mem_free (args); |
| } |
| |
| static int |
| ct_connect (app_worker_t * client_wrk, session_t * ll, |
| session_endpoint_cfg_t * sep) |
| { |
| ct_accept_rpc_args_t *args; |
| ct_main_t *cm = &ct_main; |
| u32 thread_index; |
| |
| /* Simple round-robin policy for spreading sessions over workers. We skip |
| * thread index 0, i.e., offset the index by 1, when we have workers as it |
| * is the one dedicated to main thread. Note that n_workers does not include |
| * main thread */ |
| cm->n_sessions += 1; |
| thread_index = cm->n_workers ? (cm->n_sessions % cm->n_workers) + 1 : 0; |
| |
| args = clib_mem_alloc (sizeof (*args)); |
| args->ll_s_index = ll->session_index; |
| args->thread_index = thread_index; |
| clib_memcpy_fast (&args->ip, &sep->ip, sizeof (ip46_address_t)); |
| args->port = sep->port; |
| args->is_ip4 = sep->is_ip4; |
| args->opaque = sep->opaque; |
| args->client_wrk_index = client_wrk->wrk_index; |
| |
| session_send_rpc_evt_to_thread (thread_index, ct_accept_rpc_wrk_handler, |
| args); |
| return 0; |
| } |
| |
| static u32 |
| ct_start_listen (u32 app_listener_index, transport_endpoint_t * tep) |
| { |
| session_endpoint_cfg_t *sep; |
| ct_connection_t *ct; |
| |
| sep = (session_endpoint_cfg_t *) tep; |
| ct = ct_connection_alloc (0); |
| ct->server_wrk = sep->app_wrk_index; |
| ct->c_is_ip4 = sep->is_ip4; |
| clib_memcpy (&ct->c_lcl_ip, &sep->ip, sizeof (sep->ip)); |
| ct->c_lcl_port = sep->port; |
| ct->c_s_index = app_listener_index; |
| ct->actual_tp = sep->transport_proto; |
| return ct->c_c_index; |
| } |
| |
| static u32 |
| ct_stop_listen (u32 ct_index) |
| { |
| ct_connection_t *ct; |
| ct = ct_connection_get (ct_index, 0); |
| ct_connection_free (ct); |
| return 0; |
| } |
| |
| static transport_connection_t * |
| ct_listener_get (u32 ct_index) |
| { |
| return (transport_connection_t *) ct_connection_get (ct_index, 0); |
| } |
| |
| static int |
| ct_session_connect (transport_endpoint_cfg_t * tep) |
| { |
| session_endpoint_cfg_t *sep_ext; |
| session_endpoint_t *sep; |
| app_worker_t *app_wrk; |
| session_handle_t lh; |
| application_t *app; |
| app_listener_t *al; |
| u32 table_index; |
| session_t *ll; |
| u8 fib_proto; |
| |
| sep_ext = (session_endpoint_cfg_t *) tep; |
| sep = (session_endpoint_t *) tep; |
| app_wrk = app_worker_get (sep_ext->app_wrk_index); |
| app = application_get (app_wrk->app_index); |
| |
| sep->transport_proto = sep_ext->original_tp; |
| table_index = application_local_session_table (app); |
| lh = session_lookup_local_endpoint (table_index, sep); |
| if (lh == SESSION_DROP_HANDLE) |
| return SESSION_E_FILTERED; |
| |
| if (lh == SESSION_INVALID_HANDLE) |
| goto global_scope; |
| |
| ll = listen_session_get_from_handle (lh); |
| al = app_listener_get_w_session (ll); |
| |
| /* |
| * Break loop if rule in local table points to connecting app. This |
| * can happen if client is a generic proxy. Route connect through |
| * global table instead. |
| */ |
| if (al->app_index == app->app_index) |
| goto global_scope; |
| |
| return ct_connect (app_wrk, ll, sep_ext); |
| |
| /* |
| * If nothing found, check the global scope for locally attached |
| * destinations. Make sure first that we're allowed to. |
| */ |
| |
| global_scope: |
| if (session_endpoint_is_local (sep)) |
| return SESSION_E_NOROUTE; |
| |
| if (!application_has_global_scope (app)) |
| return SESSION_E_SCOPE; |
| |
| fib_proto = session_endpoint_fib_proto (sep); |
| table_index = session_lookup_get_index_for_fib (fib_proto, sep->fib_index); |
| ll = session_lookup_listener_wildcard (table_index, sep); |
| |
| if (ll) |
| return ct_connect (app_wrk, ll, sep_ext); |
| |
| /* Failed to connect but no error */ |
| return 1; |
| } |
| |
| static void |
| ct_session_close (u32 ct_index, u32 thread_index) |
| { |
| ct_connection_t *ct, *peer_ct; |
| app_worker_t *app_wrk; |
| session_t *s; |
| |
| ct = ct_connection_get (ct_index, thread_index); |
| peer_ct = ct_connection_get (ct->peer_index, thread_index); |
| if (peer_ct) |
| { |
| peer_ct->peer_index = ~0; |
| /* Make sure session was allocated */ |
| if (peer_ct->c_s_index != ~0) |
| session_transport_closing_notify (&peer_ct->connection); |
| else |
| ct_connection_free (peer_ct); |
| } |
| |
| s = session_get (ct->c_s_index, ct->c_thread_index); |
| app_wrk = app_worker_get_if_valid (s->app_wrk_index); |
| if (app_wrk) |
| app_worker_del_segment_notify (app_wrk, ct->segment_handle); |
| session_free_w_fifos (s); |
| if (ct->is_client) |
| segment_manager_dealloc_fifos (ct->client_rx_fifo, ct->client_tx_fifo); |
| |
| ct_connection_free (ct); |
| } |
| |
| static transport_connection_t * |
| ct_session_get (u32 ct_index, u32 thread_index) |
| { |
| return (transport_connection_t *) ct_connection_get (ct_index, |
| thread_index); |
| } |
| |
| static u8 * |
| format_ct_connection_id (u8 * s, va_list * args) |
| { |
| ct_connection_t *ct = va_arg (*args, ct_connection_t *); |
| if (!ct) |
| return s; |
| if (ct->c_is_ip4) |
| { |
| s = format (s, "[%d:%d][CT:%U] %U:%d->%U:%d", ct->c_thread_index, |
| ct->c_s_index, format_transport_proto_short, ct->actual_tp, |
| format_ip4_address, &ct->c_lcl_ip4, |
| clib_net_to_host_u16 (ct->c_lcl_port), format_ip4_address, |
| &ct->c_rmt_ip4, clib_net_to_host_u16 (ct->c_rmt_port)); |
| } |
| else |
| { |
| s = format (s, "[%d:%d][CT:%U] %U:%d->%U:%d", ct->c_thread_index, |
| ct->c_s_index, format_transport_proto_short, ct->actual_tp, |
| format_ip6_address, &ct->c_lcl_ip6, |
| clib_net_to_host_u16 (ct->c_lcl_port), format_ip6_address, |
| &ct->c_rmt_ip6, clib_net_to_host_u16 (ct->c_rmt_port)); |
| } |
| |
| return s; |
| } |
| |
| static int |
| ct_custom_tx (void *session, transport_send_params_t * sp) |
| { |
| session_t *s = (session_t *) session; |
| if (session_has_transport (s)) |
| return 0; |
| /* If event enqueued towards peer, remove from scheduler and |
| * remove session tx flag, i.e., accept new tx events */ |
| if (!ct_session_tx (s)) |
| { |
| sp->flags = TRANSPORT_SND_F_DESCHED; |
| svm_fifo_unset_event (s->tx_fifo); |
| } |
| /* The scheduler uses packet count as a means of upper bounding the amount |
| * of work done per dispatch. So make it look like we have sent something */ |
| return 1; |
| } |
| |
| static int |
| ct_app_rx_evt (transport_connection_t * tc) |
| { |
| ct_connection_t *ct = (ct_connection_t *) tc, *peer_ct; |
| session_t *ps; |
| |
| peer_ct = ct_connection_get (ct->peer_index, tc->thread_index); |
| if (!peer_ct) |
| return -1; |
| ps = session_get (peer_ct->c_s_index, peer_ct->c_thread_index); |
| return session_dequeue_notify (ps); |
| } |
| |
| static u8 * |
| format_ct_listener (u8 * s, va_list * args) |
| { |
| u32 tc_index = va_arg (*args, u32); |
| u32 __clib_unused thread_index = va_arg (*args, u32); |
| u32 __clib_unused verbose = va_arg (*args, u32); |
| ct_connection_t *ct = ct_connection_get (tc_index, 0); |
| s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct); |
| if (verbose) |
| s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "LISTEN"); |
| return s; |
| } |
| |
| static u8 * |
| format_ct_connection (u8 * s, va_list * args) |
| { |
| ct_connection_t *ct = va_arg (*args, ct_connection_t *); |
| u32 verbose = va_arg (*args, u32); |
| |
| if (!ct) |
| return s; |
| s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct); |
| if (verbose) |
| { |
| s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "ESTABLISHED"); |
| if (verbose > 1) |
| { |
| s = format (s, "\n"); |
| } |
| } |
| return s; |
| } |
| |
| static u8 * |
| format_ct_session (u8 * s, va_list * args) |
| { |
| u32 ct_index = va_arg (*args, u32); |
| u32 thread_index = va_arg (*args, u32); |
| u32 verbose = va_arg (*args, u32); |
| ct_connection_t *ct; |
| |
| ct = ct_connection_get (ct_index, thread_index); |
| if (!ct) |
| { |
| s = format (s, "empty\n"); |
| return s; |
| } |
| |
| s = format (s, "%U", format_ct_connection, ct, verbose); |
| return s; |
| } |
| |
| clib_error_t * |
| ct_enable_disable (vlib_main_t * vm, u8 is_en) |
| { |
| ct_main.n_workers = vlib_num_workers (); |
| vec_validate (ct_main.connections, ct_main.n_workers); |
| return 0; |
| } |
| |
| /* *INDENT-OFF* */ |
| static const transport_proto_vft_t cut_thru_proto = { |
| .enable = ct_enable_disable, |
| .start_listen = ct_start_listen, |
| .stop_listen = ct_stop_listen, |
| .get_listener = ct_listener_get, |
| .connect = ct_session_connect, |
| .close = ct_session_close, |
| .get_connection = ct_session_get, |
| .custom_tx = ct_custom_tx, |
| .app_rx_evt = ct_app_rx_evt, |
| .format_listener = format_ct_listener, |
| .format_connection = format_ct_session, |
| .transport_options = { |
| .name = "ct", |
| .short_name = "C", |
| .tx_type = TRANSPORT_TX_INTERNAL, |
| .service_type = TRANSPORT_SERVICE_APP, |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| int |
| ct_session_tx (session_t * s) |
| { |
| ct_connection_t *ct, *peer_ct; |
| session_t *peer_s; |
| |
| ct = (ct_connection_t *) session_get_transport (s); |
| peer_ct = ct_connection_get (ct->peer_index, ct->c_thread_index); |
| if (!peer_ct) |
| return 0; |
| peer_s = session_get (peer_ct->c_s_index, peer_ct->c_thread_index); |
| if (peer_s->session_state >= SESSION_STATE_TRANSPORT_CLOSING) |
| return 0; |
| return session_enqueue_notify (peer_s); |
| } |
| |
| static clib_error_t * |
| ct_transport_init (vlib_main_t * vm) |
| { |
| transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto, |
| FIB_PROTOCOL_IP4, ~0); |
| transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto, |
| FIB_PROTOCOL_IP6, ~0); |
| return 0; |
| } |
| |
| VLIB_INIT_FUNCTION (ct_transport_init); |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |