2 * Copyright (c) 2017 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vnet/session/application.h>
17 #include <vnet/session/application_interface.h>
18 #include <vnet/session/application_namespace.h>
19 #include <vnet/session/session.h>
22 * Pool from which we allocate all applications
24 static application_t *app_pool;
27 * Hash table of apps by api client index
29 static uword *app_by_api_client_index;
32 * Default application event queue size
34 static u32 default_app_evt_queue_size = 128;
37 app_get_name_from_reg_index (application_t * app)
41 vl_api_registration_t *regp;
42 regp = vl_api_client_index_to_registration (app->api_client_index);
44 app_name = format (0, "builtin-%d%c", app->index, 0);
46 app_name = format (0, "%s%c", regp->name, 0);
52 application_session_table (application_t * app, u8 fib_proto)
54 app_namespace_t *app_ns;
55 app_ns = app_namespace_get (app->ns_index);
56 if (!application_has_global_scope (app))
57 return APP_INVALID_INDEX;
58 if (fib_proto == FIB_PROTOCOL_IP4)
59 return session_lookup_get_index_for_fib (fib_proto,
60 app_ns->ip4_fib_index);
62 return session_lookup_get_index_for_fib (fib_proto,
63 app_ns->ip6_fib_index);
67 application_local_session_table (application_t * app)
69 app_namespace_t *app_ns;
70 if (!application_has_local_scope (app))
71 return APP_INVALID_INDEX;
72 app_ns = app_namespace_get (app->ns_index);
73 return app_ns->local_table_index;
77 application_api_queue_is_full (application_t * app)
81 /* builtin servers are always OK */
82 if (app->api_client_index == ~0)
85 q = vl_api_client_index_to_input_queue (app->api_client_index);
89 if (q->cursize == q->maxsize)
97 * Since the name is not stored per app, we generate it on the fly. It is
98 * the caller's responsibility to free the vector
101 application_name_from_index (u32 app_index)
103 application_t *app = application_get (app_index);
106 return app_get_name_from_reg_index (app);
110 application_table_add (application_t * app)
112 hash_set (app_by_api_client_index, app->api_client_index, app->index);
116 application_table_del (application_t * app)
118 hash_unset (app_by_api_client_index, app->api_client_index);
122 application_lookup (u32 api_client_index)
125 p = hash_get (app_by_api_client_index, api_client_index);
127 return application_get (p[0]);
136 pool_get (app_pool, app);
137 memset (app, 0, sizeof (*app));
138 app->index = application_get_index (app);
139 app->connects_seg_manager = APP_INVALID_SEGMENT_MANAGER_INDEX;
140 app->first_segment_manager = APP_INVALID_SEGMENT_MANAGER_INDEX;
142 clib_warning ("[%d] New app (%d)", getpid (), app->index);
147 application_del (application_t * app)
149 vnet_unbind_args_t _a, *a = &_a;
150 segment_manager_t *sm;
151 u64 handle, *handles = 0;
156 * The app event queue allocated in first segment is cleared with
157 * the segment manager. No need to explicitly free it.
160 clib_warning ("[%d] Delete app (%d)", getpid (), app->index);
162 if (application_is_proxy (app))
163 application_remove_proxy (app);
170 hash_foreach (handle, index, app->listeners_table,
172 vec_add1 (handles, handle);
173 sm = segment_manager_get (index);
174 sm->app_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
178 for (i = 0; i < vec_len (handles); i++)
180 a->app_index = app->index;
181 a->handle = handles[i];
182 /* seg manager is removed when unbind completes */
187 * Connects segment manager cleanup
190 if (app->connects_seg_manager != APP_INVALID_SEGMENT_MANAGER_INDEX)
192 sm = segment_manager_get (app->connects_seg_manager);
193 sm->app_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
194 segment_manager_init_del (sm);
197 /* If first segment manager is used by a listener */
198 if (app->first_segment_manager != APP_INVALID_SEGMENT_MANAGER_INDEX
199 && app->first_segment_manager != app->connects_seg_manager)
201 sm = segment_manager_get (app->first_segment_manager);
202 /* .. and has no fifos, e.g. it might be used for redirected sessions,
204 if (!segment_manager_has_fifos (sm))
206 sm->app_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
207 segment_manager_del (sm);
210 application_table_del (app);
211 pool_put (app_pool, app);
215 application_verify_cb_fns (session_cb_vft_t * cb_fns)
217 if (cb_fns->session_accept_callback == 0)
218 clib_warning ("No accept callback function provided");
219 if (cb_fns->session_connected_callback == 0)
220 clib_warning ("No session connected callback function provided");
221 if (cb_fns->session_disconnect_callback == 0)
222 clib_warning ("No session disconnect callback function provided");
223 if (cb_fns->session_reset_callback == 0)
224 clib_warning ("No session reset callback function provided");
228 * Check app config for given segment type
230 * Returns 1 on success and 0 otherwise
233 application_verify_cfg (ssvm_segment_type_t st)
236 if (st == SSVM_SEGMENT_MEMFD)
238 is_valid = (session_manager_get_evt_q_segment () != 0);
240 clib_warning ("memfd seg: vpp's event qs IN binary api svm region");
243 else if (st == SSVM_SEGMENT_SHM)
245 is_valid = (session_manager_get_evt_q_segment () == 0);
247 clib_warning ("shm seg: vpp's event qs NOT IN binary api svm region");
255 application_init (application_t * app, u32 api_client_index, u64 * options,
256 session_cb_vft_t * cb_fns)
258 u32 app_evt_queue_size, first_seg_size, prealloc_fifo_pairs;
259 ssvm_segment_type_t seg_type = SSVM_SEGMENT_MEMFD;
260 segment_manager_properties_t *props;
261 vl_api_registration_t *reg;
262 segment_manager_t *sm;
266 * Make sure we support the requested configuration
269 if (!(options[APP_OPTIONS_FLAGS] & APP_OPTIONS_FLAGS_IS_BUILTIN))
271 reg = vl_api_client_index_to_registration (api_client_index);
273 return VNET_API_ERROR_APP_UNSUPPORTED_CFG;
274 if (vl_api_registration_file_index (reg) == VL_API_INVALID_FI)
275 seg_type = SSVM_SEGMENT_SHM;
279 seg_type = SSVM_SEGMENT_PRIVATE;
282 if (!application_verify_cfg (seg_type))
283 return VNET_API_ERROR_APP_UNSUPPORTED_CFG;
286 * Setup segment manager
288 sm = segment_manager_new ();
289 sm->app_index = app->index;
290 props = application_segment_manager_properties (app);
291 segment_manager_properties_init (props);
292 if (options[APP_OPTIONS_ADD_SEGMENT_SIZE])
294 props->add_segment_size = options[APP_OPTIONS_ADD_SEGMENT_SIZE];
295 props->add_segment = 1;
297 if (options[APP_OPTIONS_RX_FIFO_SIZE])
298 props->rx_fifo_size = options[APP_OPTIONS_RX_FIFO_SIZE];
299 if (options[APP_OPTIONS_TX_FIFO_SIZE])
300 props->tx_fifo_size = options[APP_OPTIONS_TX_FIFO_SIZE];
301 props->segment_type = seg_type;
303 app_evt_queue_size = options[APP_OPTIONS_EVT_QUEUE_SIZE] > 0 ?
304 options[APP_OPTIONS_EVT_QUEUE_SIZE] : default_app_evt_queue_size;
305 first_seg_size = options[APP_OPTIONS_SEGMENT_SIZE];
306 prealloc_fifo_pairs = options[APP_OPTIONS_PREALLOC_FIFO_PAIRS];
308 if ((rv = segment_manager_init (sm, first_seg_size, app_evt_queue_size,
309 prealloc_fifo_pairs)))
311 sm->first_is_protected = 1;
316 app->first_segment_manager = segment_manager_index (sm);
317 app->api_client_index = api_client_index;
318 app->flags = options[APP_OPTIONS_FLAGS];
319 app->cb_fns = *cb_fns;
320 app->ns_index = options[APP_OPTIONS_NAMESPACE];
321 app->listeners_table = hash_create (0, sizeof (u64));
322 app->proxied_transports = options[APP_OPTIONS_PROXY_TRANSPORT];
323 app->event_queue = segment_manager_event_queue (sm);
325 /* If no scope enabled, default to global */
326 if (!application_has_global_scope (app)
327 && !application_has_local_scope (app))
328 app->flags |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
330 /* Check that the obvious things are properly set up */
331 application_verify_cb_fns (cb_fns);
333 /* Add app to lookup by api_client_index table */
334 application_table_add (app);
340 application_get (u32 index)
342 if (index == APP_INVALID_INDEX)
344 return pool_elt_at_index (app_pool, index);
348 application_get_if_valid (u32 index)
350 if (pool_is_free_index (app_pool, index))
353 return pool_elt_at_index (app_pool, index);
357 application_get_index (application_t * app)
359 return app - app_pool;
362 static segment_manager_t *
363 application_alloc_segment_manager (application_t * app)
365 segment_manager_t *sm = 0;
367 /* If the first segment manager is not in use, don't allocate a new one */
368 if (app->first_segment_manager != APP_INVALID_SEGMENT_MANAGER_INDEX
369 && app->first_segment_manager_in_use == 0)
371 sm = segment_manager_get (app->first_segment_manager);
372 app->first_segment_manager_in_use = 1;
376 sm = segment_manager_new ();
377 sm->app_index = app->index;
383 * Start listening local transport endpoint for requested transport.
385 * Creates a 'dummy' stream session with state LISTENING to be used in session
386 * lookups, prior to establishing connection. Requests transport to build
387 * it's own specific listening connection.
390 application_start_listen (application_t * srv, session_endpoint_t * sep,
393 segment_manager_t *sm;
398 sst = session_type_from_proto_and_ip (sep->transport_proto, sep->is_ip4);
399 s = listen_session_new (sst);
400 s->app_index = srv->index;
402 if (stream_session_listen (s, sep))
405 /* Allocate segment manager. All sessions derived out of a listen session
406 * have fifos allocated by the same segment manager. */
407 sm = application_alloc_segment_manager (srv);
411 /* Add to app's listener table. Useful to find all child listeners
412 * when app goes down, although, just for unbinding this is not needed */
413 handle = listen_session_get_handle (s);
414 hash_set (srv->listeners_table, handle, segment_manager_index (sm));
420 listen_session_del (s);
425 * Stop listening on session associated to handle
428 application_stop_listen (application_t * srv, u64 handle)
430 stream_session_t *listener;
432 segment_manager_t *sm;
434 if (srv && hash_get (srv->listeners_table, handle) == 0)
436 clib_warning ("app doesn't own handle %llu!", handle);
440 listener = listen_session_get_from_handle (handle);
441 stream_session_stop_listen (listener);
443 indexp = hash_get (srv->listeners_table, handle);
446 sm = segment_manager_get (*indexp);
447 if (srv->first_segment_manager == *indexp)
449 /* Delete sessions but don't remove segment manager */
450 srv->first_segment_manager_in_use = 0;
451 segment_manager_del_sessions (sm);
455 segment_manager_init_del (sm);
457 hash_unset (srv->listeners_table, handle);
458 listen_session_del (listener);
464 application_open_session (application_t * app, session_endpoint_t * sep,
467 segment_manager_t *sm;
470 /* Make sure we have a segment manager for connects */
471 if (app->connects_seg_manager == APP_INVALID_SEGMENT_MANAGER_INDEX)
473 sm = application_alloc_segment_manager (app);
476 app->connects_seg_manager = segment_manager_index (sm);
479 if ((rv = session_open (app->index, sep, api_context)))
486 application_get_connect_segment_manager (application_t * app)
488 ASSERT (app->connects_seg_manager != (u32) ~ 0);
489 return segment_manager_get (app->connects_seg_manager);
493 application_get_listen_segment_manager (application_t * app,
494 stream_session_t * s)
497 smp = hash_get (app->listeners_table, listen_session_get_handle (s));
499 return segment_manager_get (*smp);
503 application_is_proxy (application_t * app)
505 return (app->flags & APP_OPTIONS_FLAGS_IS_PROXY);
509 application_is_builtin (application_t * app)
511 return (app->flags & APP_OPTIONS_FLAGS_IS_BUILTIN);
515 application_is_builtin_proxy (application_t * app)
517 return (application_is_proxy (app) && application_is_builtin (app));
521 * Send an API message to the external app, to map new segment
524 application_add_segment_notify (u32 app_index, ssvm_private_t * fs)
526 application_t *app = application_get (app_index);
527 return app->cb_fns.add_segment_callback (app->api_client_index, fs);
531 application_has_local_scope (application_t * app)
533 return app->flags & APP_OPTIONS_FLAGS_USE_LOCAL_SCOPE;
537 application_has_global_scope (application_t * app)
539 return app->flags & APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
543 application_n_listeners (application_t * app)
545 return hash_elts (app->listeners_table);
549 application_first_listener (application_t * app, u8 fib_proto,
552 stream_session_t *listener;
557 sst = session_type_from_proto_and_ip (transport_proto,
558 fib_proto == FIB_PROTOCOL_IP4);
561 hash_foreach (handle, sm_index, app->listeners_table, ({
562 listener = listen_session_get_from_handle (handle);
563 if (listener->session_type == sst
564 && listener->listener_index != SESSION_PROXY_LISTENER_INDEX)
573 application_proxy_listener (application_t * app, u8 fib_proto,
576 stream_session_t *listener;
581 sst = session_type_from_proto_and_ip (transport_proto,
582 fib_proto == FIB_PROTOCOL_IP4);
585 hash_foreach (handle, sm_index, app->listeners_table, ({
586 listener = listen_session_get_from_handle (handle);
587 if (listener->session_type == sst
588 && listener->listener_index == SESSION_PROXY_LISTENER_INDEX)
596 static clib_error_t *
597 application_start_stop_proxy_fib_proto (application_t * app, u8 fib_proto,
598 u8 transport_proto, u8 is_start)
600 app_namespace_t *app_ns = app_namespace_get (app->ns_index);
601 u8 is_ip4 = (fib_proto == FIB_PROTOCOL_IP4);
602 session_endpoint_t sep = SESSION_ENDPOINT_NULL;
603 transport_connection_t *tc;
609 s = application_first_listener (app, fib_proto, transport_proto);
613 sep.fib_index = app_namespace_get_fib_index (app_ns, fib_proto);
614 sep.sw_if_index = app_ns->sw_if_index;
615 sep.transport_proto = transport_proto;
616 application_start_listen (app, &sep, &handle);
617 s = listen_session_get_from_handle (handle);
618 s->listener_index = SESSION_PROXY_LISTENER_INDEX;
623 s = application_proxy_listener (app, fib_proto, transport_proto);
627 tc = listen_session_get_transport (s);
629 if (!ip_is_zero (&tc->lcl_ip, 1))
633 sep.fib_index = app_namespace_get_fib_index (app_ns, fib_proto);
634 sep.transport_proto = transport_proto;
636 sti = session_lookup_get_index_for_fib (fib_proto, sep.fib_index);
638 session_lookup_add_session_endpoint (sti, &sep, s->session_index);
640 session_lookup_del_session_endpoint (sti, &sep);
647 application_start_stop_proxy_local_scope (application_t * app,
648 u8 transport_proto, u8 is_start)
650 session_endpoint_t sep = SESSION_ENDPOINT_NULL;
651 app_namespace_t *app_ns;
652 app_ns = app_namespace_get (app->ns_index);
654 sep.transport_proto = transport_proto;
659 session_lookup_add_session_endpoint (app_ns->local_table_index, &sep,
662 session_lookup_add_session_endpoint (app_ns->local_table_index, &sep,
667 session_lookup_del_session_endpoint (app_ns->local_table_index, &sep);
669 session_lookup_del_session_endpoint (app_ns->local_table_index, &sep);
674 application_start_stop_proxy (application_t * app,
675 transport_proto_t transport_proto, u8 is_start)
677 if (application_has_local_scope (app))
678 application_start_stop_proxy_local_scope (app, transport_proto, is_start);
680 if (application_has_global_scope (app))
682 application_start_stop_proxy_fib_proto (app, FIB_PROTOCOL_IP4,
683 transport_proto, is_start);
684 application_start_stop_proxy_fib_proto (app, FIB_PROTOCOL_IP6,
685 transport_proto, is_start);
690 application_setup_proxy (application_t * app)
692 u16 transports = app->proxied_transports;
693 transport_proto_t tp;
695 ASSERT (application_is_proxy (app));
698 transport_proto_foreach (tp, ({
699 if (transports & (1 << tp))
700 application_start_stop_proxy (app, tp, 1);
706 application_remove_proxy (application_t * app)
708 u16 transports = app->proxied_transports;
709 transport_proto_t tp;
711 ASSERT (application_is_proxy (app));
714 transport_proto_foreach (tp, ({
715 if (transports & (1 << tp))
716 application_start_stop_proxy (app, tp, 0);
721 segment_manager_properties_t *
722 application_segment_manager_properties (application_t * app)
724 return &app->sm_properties;
727 segment_manager_properties_t *
728 application_get_segment_manager_properties (u32 app_index)
730 application_t *app = application_get (app_index);
731 return &app->sm_properties;
735 format_application_listener (u8 * s, va_list * args)
737 application_t *app = va_arg (*args, application_t *);
738 u64 handle = va_arg (*args, u64);
739 u32 index = va_arg (*args, u32);
740 int verbose = va_arg (*args, int);
741 stream_session_t *listener;
747 s = format (s, "%-40s%-20s%-15s%-15s%-10s", "Connection", "App",
748 "API Client", "ListenerID", "SegManager");
750 s = format (s, "%-40s%-20s", "Connection", "App");
755 app_name = app_get_name_from_reg_index (app);
756 listener = listen_session_get_from_handle (handle);
757 str = format (0, "%U", format_stream_session, listener, verbose);
761 s = format (s, "%-40s%-20s%-15u%-15u%-10u", str, app_name,
762 app->api_client_index, handle, index);
765 s = format (s, "%-40s%-20s", str, app_name);
772 application_format_connects (application_t * app, int verbose)
774 svm_fifo_segment_private_t *fifo_segment;
775 vlib_main_t *vm = vlib_get_main ();
776 segment_manager_t *sm;
777 u8 *app_name, *s = 0;
783 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
784 "API Client", "SegManager");
786 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
791 if (app->connects_seg_manager == (u32) ~ 0)
794 app_name = app_get_name_from_reg_index (app);
796 /* Across all fifo segments */
797 sm = segment_manager_get (app->connects_seg_manager);
800 segment_manager_foreach_segment_w_lock (fifo_segment, sm, ({
804 fifo = svm_fifo_segment_get_fifo_list (fifo_segment);
807 u32 session_index, thread_index;
808 stream_session_t *session;
810 session_index = fifo->master_session_index;
811 thread_index = fifo->master_thread_index;
813 session = session_get (session_index, thread_index);
814 str = format (0, "%U", format_stream_session, session, verbose);
817 s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
818 app->api_client_index, app->connects_seg_manager);
820 s = format (s, "%-40s%-20s", str, app_name);
822 vlib_cli_output (vm, "%v", s);
823 vec_reset_length (s);
836 format_application (u8 * s, va_list * args)
838 application_t *app = va_arg (*args, application_t *);
839 CLIB_UNUSED (int verbose) = va_arg (*args, int);
840 segment_manager_properties_t *props;
841 const u8 *app_ns_name;
847 s = format (s, "%-10s%-20s%-15s%-15s%-15s%-15s%-15s", "Index", "Name",
848 "API Client", "Namespace", "Add seg size", "Rx fifo size",
852 format (s, "%-10s%-20s%-15s%-40s", "Index", "Name", "API Client",
857 app_name = app_get_name_from_reg_index (app);
858 app_ns_name = app_namespace_id_from_index (app->ns_index);
859 props = application_segment_manager_properties (app);
862 format (s, "%-10d%-20s%-15d%-15d%-15d%-15d%-15d", app->index, app_name,
863 app->api_client_index, app->ns_index,
864 props->add_segment_size,
865 props->rx_fifo_size, props->tx_fifo_size);
867 s = format (s, "%-10d%-20s%-15d%-40s", app->index, app_name,
868 app->api_client_index, app_ns_name);
872 static clib_error_t *
873 show_app_command_fn (vlib_main_t * vm, unformat_input_t * input,
874 vlib_cli_command_t * cmd)
881 session_cli_return_if_not_enabled ();
883 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
885 if (unformat (input, "server"))
887 else if (unformat (input, "client"))
889 else if (unformat (input, "verbose"))
899 if (pool_elts (app_pool))
901 vlib_cli_output (vm, "%U", format_application_listener,
902 0 /* header */ , 0, 0, verbose);
905 pool_foreach (app, app_pool, ({
906 /* App's listener sessions */
907 if (hash_elts (app->listeners_table) == 0)
909 hash_foreach (handle, index, app->listeners_table, ({
910 vlib_cli_output (vm, "%U", format_application_listener, app,
911 handle, index, verbose);
918 vlib_cli_output (vm, "No active server bindings");
923 if (pool_elts (app_pool))
925 application_format_connects (0, verbose);
928 pool_foreach (app, app_pool,
930 if (app->connects_seg_manager == (u32)~0)
932 application_format_connects (app, verbose);
937 vlib_cli_output (vm, "No active client bindings");
940 /* Print app related info */
941 if (!do_server && !do_client)
943 vlib_cli_output (vm, "%U", format_application, 0, verbose);
945 pool_foreach (app, app_pool, ({
946 vlib_cli_output (vm, "%U", format_application, app, verbose);
955 VLIB_CLI_COMMAND (show_app_command, static) =
958 .short_help = "show app [server|client] [verbose]",
959 .function = show_app_command_fn,
964 * fd.io coding-style-patch-verification: ON
967 * eval: (c-set-style "gnu")