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)
79 unix_shared_memory_queue_t *q;
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 segment_manager_t *sm;
151 u32 index, *handles = 0;
153 vnet_unbind_args_t _a, *a = &_a;
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);
167 hash_foreach (handle, index, app->listeners_table,
169 vec_add1 (handles, handle);
170 sm = segment_manager_get (index);
171 sm->app_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
175 for (i = 0; i < vec_len (handles); i++)
177 a->app_index = app->index;
178 a->handle = handles[i];
179 /* seg manager is removed when unbind completes */
184 * Connects segment manager cleanup
187 if (app->connects_seg_manager != APP_INVALID_SEGMENT_MANAGER_INDEX)
189 sm = segment_manager_get (app->connects_seg_manager);
190 sm->app_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
191 segment_manager_init_del (sm);
194 /* If first segment manager is used by a listener */
195 if (app->first_segment_manager != APP_INVALID_SEGMENT_MANAGER_INDEX
196 && app->first_segment_manager != app->connects_seg_manager)
198 sm = segment_manager_get (app->first_segment_manager);
199 /* .. and has no fifos, e.g. it might be used for redirected sessions,
201 if (!segment_manager_has_fifos (sm))
203 sm->app_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
204 segment_manager_del (sm);
208 application_table_del (app);
209 pool_put (app_pool, app);
213 application_verify_cb_fns (session_cb_vft_t * cb_fns)
215 if (cb_fns->session_accept_callback == 0)
216 clib_warning ("No accept callback function provided");
217 if (cb_fns->session_connected_callback == 0)
218 clib_warning ("No session connected callback function provided");
219 if (cb_fns->session_disconnect_callback == 0)
220 clib_warning ("No session disconnect callback function provided");
221 if (cb_fns->session_reset_callback == 0)
222 clib_warning ("No session reset callback function provided");
226 application_init (application_t * app, u32 api_client_index, u64 * options,
227 session_cb_vft_t * cb_fns)
229 segment_manager_t *sm;
230 segment_manager_properties_t *props;
231 u32 app_evt_queue_size, first_seg_size;
232 u32 default_rx_fifo_size = 16 << 10, default_tx_fifo_size = 16 << 10;
235 app_evt_queue_size = options[APP_EVT_QUEUE_SIZE] > 0 ?
236 options[APP_EVT_QUEUE_SIZE] : default_app_evt_queue_size;
239 * Setup segment manager
241 sm = segment_manager_new ();
242 sm->app_index = app->index;
243 props = &app->sm_properties;
244 props->add_segment_size = options[SESSION_OPTIONS_ADD_SEGMENT_SIZE];
245 props->rx_fifo_size = options[SESSION_OPTIONS_RX_FIFO_SIZE];
246 props->rx_fifo_size =
247 props->rx_fifo_size ? props->rx_fifo_size : default_rx_fifo_size;
248 props->tx_fifo_size = options[SESSION_OPTIONS_TX_FIFO_SIZE];
249 props->tx_fifo_size =
250 props->tx_fifo_size ? props->tx_fifo_size : default_tx_fifo_size;
251 props->add_segment = props->add_segment_size != 0;
252 props->preallocated_fifo_pairs = options[APP_OPTIONS_PREALLOC_FIFO_PAIRS];
253 props->use_private_segment = options[APP_OPTIONS_FLAGS]
254 & APP_OPTIONS_FLAGS_BUILTIN_APP;
255 props->private_segment_count = options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT];
256 props->private_segment_size = options[APP_OPTIONS_PRIVATE_SEGMENT_SIZE];
258 first_seg_size = options[SESSION_OPTIONS_SEGMENT_SIZE];
259 if ((rv = segment_manager_init (sm, props, first_seg_size)))
261 sm->first_is_protected = 1;
266 app->first_segment_manager = segment_manager_index (sm);
267 app->api_client_index = api_client_index;
268 app->flags = options[APP_OPTIONS_FLAGS];
269 app->cb_fns = *cb_fns;
270 app->ns_index = options[APP_OPTIONS_NAMESPACE];
272 /* If no scope enabled, default to global */
273 if (!application_has_global_scope (app)
274 && !application_has_local_scope (app))
275 app->flags |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
277 /* Allocate app event queue in the first shared-memory segment */
278 app->event_queue = segment_manager_alloc_queue (sm, app_evt_queue_size);
280 /* Check that the obvious things are properly set up */
281 application_verify_cb_fns (cb_fns);
283 /* Add app to lookup by api_client_index table */
284 application_table_add (app);
290 application_get (u32 index)
292 if (index == APP_INVALID_INDEX)
294 return pool_elt_at_index (app_pool, index);
298 application_get_if_valid (u32 index)
300 if (pool_is_free_index (app_pool, index))
303 return pool_elt_at_index (app_pool, index);
307 application_get_index (application_t * app)
309 return app - app_pool;
312 static segment_manager_t *
313 application_alloc_segment_manager (application_t * app)
315 segment_manager_t *sm = 0;
317 /* If the first segment manager is not in use, don't allocate a new one */
318 if (app->first_segment_manager != APP_INVALID_SEGMENT_MANAGER_INDEX
319 && app->first_segment_manager_in_use == 0)
321 sm = segment_manager_get (app->first_segment_manager);
322 app->first_segment_manager_in_use = 1;
326 sm = segment_manager_new ();
327 sm->properties = &app->sm_properties;
333 * Start listening local transport endpoint for requested transport.
335 * Creates a 'dummy' stream session with state LISTENING to be used in session
336 * lookups, prior to establishing connection. Requests transport to build
337 * it's own specific listening connection.
340 application_start_listen (application_t * srv, session_endpoint_t * sep,
343 segment_manager_t *sm;
348 sst = session_type_from_proto_and_ip (sep->transport_proto, sep->is_ip4);
349 s = listen_session_new (sst);
350 s->app_index = srv->index;
352 if (stream_session_listen (s, sep))
355 /* Allocate segment manager. All sessions derived out of a listen session
356 * have fifos allocated by the same segment manager. */
357 sm = application_alloc_segment_manager (srv);
361 /* Add to app's listener table. Useful to find all child listeners
362 * when app goes down, although, just for unbinding this is not needed */
363 handle = listen_session_get_handle (s);
364 hash_set (srv->listeners_table, handle, segment_manager_index (sm));
370 listen_session_del (s);
375 * Stop listening on session associated to handle
378 application_stop_listen (application_t * srv, u64 handle)
380 stream_session_t *listener;
382 segment_manager_t *sm;
384 if (srv && hash_get (srv->listeners_table, handle) == 0)
386 clib_warning ("app doesn't own handle %llu!", handle);
390 listener = listen_session_get_from_handle (handle);
391 stream_session_stop_listen (listener);
393 indexp = hash_get (srv->listeners_table, handle);
396 sm = segment_manager_get (*indexp);
397 if (srv->first_segment_manager == *indexp)
399 /* Delete sessions but don't remove segment manager */
400 srv->first_segment_manager_in_use = 0;
401 segment_manager_del_sessions (sm);
405 segment_manager_init_del (sm);
407 hash_unset (srv->listeners_table, handle);
408 listen_session_del (listener);
414 application_open_session (application_t * app, session_endpoint_t * sep,
417 segment_manager_t *sm;
418 transport_connection_t *tc = 0;
421 /* Make sure we have a segment manager for connects */
422 if (app->connects_seg_manager == APP_INVALID_SEGMENT_MANAGER_INDEX)
424 sm = application_alloc_segment_manager (app);
427 app->connects_seg_manager = segment_manager_index (sm);
430 if ((rv = stream_session_open (app->index, sep, &tc)))
433 /* Store api_context for when the reply comes. Not the nicest thing
434 * but better than allocating a separate half-open pool. */
435 tc->s_index = api_context;
441 application_get_connect_segment_manager (application_t * app)
443 ASSERT (app->connects_seg_manager != (u32) ~ 0);
444 return segment_manager_get (app->connects_seg_manager);
448 application_get_listen_segment_manager (application_t * app,
449 stream_session_t * s)
452 smp = hash_get (app->listeners_table, listen_session_get_handle (s));
454 return segment_manager_get (*smp);
458 application_is_proxy (application_t * app)
460 return !(app->flags & APP_OPTIONS_FLAGS_IS_PROXY);
464 application_add_segment_notify (u32 app_index, u32 fifo_segment_index)
466 application_t *app = application_get (app_index);
470 /* Send an API message to the external app, to map new segment */
471 ASSERT (app->cb_fns.add_segment_callback);
473 segment_manager_get_segment_info (fifo_segment_index, &seg_name, &seg_size);
474 return app->cb_fns.add_segment_callback (app->api_client_index, seg_name,
479 application_has_local_scope (application_t * app)
481 return app->flags & APP_OPTIONS_FLAGS_USE_LOCAL_SCOPE;
485 application_has_global_scope (application_t * app)
487 return app->flags & APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
491 format_application_listener (u8 * s, va_list * args)
493 application_t *app = va_arg (*args, application_t *);
494 u64 handle = va_arg (*args, u64);
495 u32 index = va_arg (*args, u32);
496 int verbose = va_arg (*args, int);
497 stream_session_t *listener;
503 s = format (s, "%-40s%-20s%-15s%-15s%-10s", "Connection", "App",
504 "API Client", "ListenerID", "SegManager");
506 s = format (s, "%-40s%-20s", "Connection", "App");
511 app_name = app_get_name_from_reg_index (app);
512 listener = listen_session_get_from_handle (handle);
513 str = format (0, "%U", format_stream_session, listener, verbose);
517 s = format (s, "%-40s%-20s%-15u%-15u%-10u", str, app_name,
518 app->api_client_index, handle, index);
521 s = format (s, "%-40s%-20s", str, app_name);
528 application_format_connects (application_t * app, int verbose)
530 vlib_main_t *vm = vlib_get_main ();
531 segment_manager_t *sm;
532 u8 *app_name, *s = 0;
539 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
540 "API Client", "SegManager");
542 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
547 if (app->connects_seg_manager == (u32) ~ 0)
550 app_name = app_get_name_from_reg_index (app);
552 /* Across all fifo segments */
553 sm = segment_manager_get (app->connects_seg_manager);
554 for (j = 0; j < vec_len (sm->segment_indices); j++)
556 svm_fifo_segment_private_t *fifo_segment;
560 fifo_segment = svm_fifo_segment_get_segment (sm->segment_indices[j]);
561 fifo = svm_fifo_segment_get_fifo_list (fifo_segment);
564 u32 session_index, thread_index;
565 stream_session_t *session;
567 session_index = fifo->master_session_index;
568 thread_index = fifo->master_thread_index;
570 session = session_get (session_index, thread_index);
571 str = format (0, "%U", format_stream_session, session, verbose);
574 s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
575 app->api_client_index, app->connects_seg_manager);
577 s = format (s, "%-40s%-20s", str, app_name);
579 vlib_cli_output (vm, "%v", s);
580 vec_reset_length (s);
592 format_application (u8 * s, va_list * args)
594 application_t *app = va_arg (*args, application_t *);
595 CLIB_UNUSED (int verbose) = va_arg (*args, int);
596 const u8 *app_ns_name;
602 s = format (s, "%-10s%-20s%-15s%-15s%-15s%-15s%-15s", "Index", "Name",
603 "Namespace", "API Client", "Add seg size", "Rx fifo size",
607 format (s, "%-10s%-20s%-15s%-20s", "Index", "Name", "Namespace",
612 app_name = app_get_name_from_reg_index (app);
613 app_ns_name = app_namespace_id_from_index (app->ns_index);
616 format (s, "%-10d%-20s%-15s%-15d%-15d%-15d%-15d", app->index, app_name,
617 app_ns_name, app->api_client_index,
618 app->sm_properties.add_segment_size,
619 app->sm_properties.rx_fifo_size,
620 app->sm_properties.tx_fifo_size);
622 s = format (s, "%-10d%-20s%-15s%-20d", app->index, app_name, app_ns_name,
623 app->api_client_index);
627 static clib_error_t *
628 show_app_command_fn (vlib_main_t * vm, unformat_input_t * input,
629 vlib_cli_command_t * cmd)
636 session_cli_return_if_not_enabled ();
638 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
640 if (unformat (input, "server"))
642 else if (unformat (input, "client"))
644 else if (unformat (input, "verbose"))
654 if (pool_elts (app_pool))
656 vlib_cli_output (vm, "%U", format_application_listener,
657 0 /* header */ , 0, 0,
660 pool_foreach (app, app_pool,
662 /* App's listener sessions */
663 if (hash_elts (app->listeners_table) == 0)
665 hash_foreach (handle, index, app->listeners_table,
667 vlib_cli_output (vm, "%U", format_application_listener, app,
668 handle, index, verbose);
674 vlib_cli_output (vm, "No active server bindings");
679 if (pool_elts (app_pool))
681 application_format_connects (0, verbose);
684 pool_foreach (app, app_pool,
686 if (app->connects_seg_manager == (u32)~0)
688 application_format_connects (app, verbose);
693 vlib_cli_output (vm, "No active client bindings");
696 /* Print app related info */
697 if (!do_server && !do_client)
699 vlib_cli_output (vm, "%U", format_application, 0, verbose);
701 pool_foreach (app, app_pool, ({
702 vlib_cli_output (vm, "%U", format_application, app, verbose);
711 VLIB_CLI_COMMAND (show_app_command, static) =
714 .short_help = "show app [server|client] [verbose]",
715 .function = show_app_command_fn,
720 * fd.io coding-style-patch-verification: ON
723 * eval: (c-set-style "gnu")