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/session.h>
21 * Pool from which we allocate all applications
23 static application_t *app_pool;
26 * Hash table of apps by api client index
28 static uword *app_by_api_client_index;
31 * Default application event queue size
33 static u32 default_app_evt_queue_size = 128;
36 application_api_queue_is_full (application_t * app)
38 unix_shared_memory_queue_t *q;
40 /* builtin servers are always OK */
41 if (app->api_client_index == ~0)
44 q = vl_api_client_index_to_input_queue (app->api_client_index);
48 if (q->cursize == q->maxsize)
54 application_table_add (application_t * app)
56 hash_set (app_by_api_client_index, app->api_client_index, app->index);
60 application_table_del (application_t * app)
62 hash_unset (app_by_api_client_index, app->api_client_index);
66 application_lookup (u32 api_client_index)
69 p = hash_get (app_by_api_client_index, api_client_index);
71 return application_get (p[0]);
80 pool_get (app_pool, app);
81 memset (app, 0, sizeof (*app));
82 app->index = application_get_index (app);
83 app->connects_seg_manager = ~0;
84 app->first_segment_manager = ~0;
86 clib_warning ("[%d] New app (%d)", getpid (), app->index);
91 application_del (application_t * app)
93 segment_manager_t *sm;
95 u32 index, *handles = 0;
97 vnet_unbind_args_t _a, *a = &_a;
100 * The app event queue allocated in first segment is cleared with
101 * the segment manager. No need to explicitly free it.
104 clib_warning ("[%d] Delete app (%d)", getpid (), app->index);
107 * Cleanup segment managers
109 if (app->connects_seg_manager != (u32) ~ 0)
111 sm = segment_manager_get (app->connects_seg_manager);
112 segment_manager_del (sm);
116 hash_foreach (handle, index, app->listeners_table,
118 vec_add1 (handles, handle);
122 /* Actual listener cleanup */
123 for (i = 0; i < vec_len (handles); i++)
125 a->app_index = app->index;
126 a->handle = handles[i];
127 /* seg manager is removed when unbind completes */
131 if (app->first_segment_manager != ~0)
133 sm = segment_manager_get (app->first_segment_manager);
134 segment_manager_first_segment_maybe_del (sm);
137 application_table_del (app);
138 pool_put (app_pool, app);
142 application_verify_cb_fns (session_cb_vft_t * cb_fns)
144 if (cb_fns->session_accept_callback == 0)
145 clib_warning ("No accept callback function provided");
146 if (cb_fns->session_connected_callback == 0)
147 clib_warning ("No session connected callback function provided");
148 if (cb_fns->session_disconnect_callback == 0)
149 clib_warning ("No session disconnect callback function provided");
150 if (cb_fns->session_reset_callback == 0)
151 clib_warning ("No session reset callback function provided");
155 application_init (application_t * app, u32 api_client_index, u64 * options,
156 session_cb_vft_t * cb_fns)
158 segment_manager_t *sm;
159 segment_manager_properties_t *props;
160 u32 app_evt_queue_size, first_seg_size;
163 app_evt_queue_size = options[APP_EVT_QUEUE_SIZE] > 0 ?
164 options[APP_EVT_QUEUE_SIZE] : default_app_evt_queue_size;
166 /* Setup segment manager */
167 sm = segment_manager_new ();
168 sm->app_index = app->index;
169 props = &app->sm_properties;
170 props->add_segment_size = options[SESSION_OPTIONS_ADD_SEGMENT_SIZE];
171 props->rx_fifo_size = options[SESSION_OPTIONS_RX_FIFO_SIZE];
172 props->tx_fifo_size = options[SESSION_OPTIONS_TX_FIFO_SIZE];
173 props->add_segment = props->add_segment_size != 0;
174 props->preallocated_fifo_pairs = options[APP_OPTIONS_PREALLOC_FIFO_PAIRS];
175 props->use_private_segment = options[APP_OPTIONS_FLAGS]
176 & APP_OPTIONS_FLAGS_BUILTIN_APP;
178 first_seg_size = options[SESSION_OPTIONS_SEGMENT_SIZE];
179 if ((rv = segment_manager_init (sm, props, first_seg_size)))
182 app->first_segment_manager = segment_manager_index (sm);
183 app->api_client_index = api_client_index;
184 app->flags = options[APP_OPTIONS_FLAGS];
185 app->cb_fns = *cb_fns;
187 /* Allocate app event queue in the first shared-memory segment */
188 app->event_queue = segment_manager_alloc_queue (sm, app_evt_queue_size);
190 /* Check that the obvious things are properly set up */
191 application_verify_cb_fns (cb_fns);
193 /* Add app to lookup by api_client_index table */
194 application_table_add (app);
200 application_get (u32 index)
202 return pool_elt_at_index (app_pool, index);
206 application_get_if_valid (u32 index)
208 if (pool_is_free_index (app_pool, index))
211 return pool_elt_at_index (app_pool, index);
215 application_get_index (application_t * app)
217 return app - app_pool;
220 static segment_manager_t *
221 application_alloc_segment_manager (application_t * app)
223 segment_manager_t *sm = 0;
225 if (app->first_segment_manager != (u32) ~ 0)
227 sm = segment_manager_get (app->first_segment_manager);
231 sm = segment_manager_new ();
232 if (segment_manager_init (sm, &app->sm_properties, 0))
238 * Start listening local transport endpoint for requested transport.
240 * Creates a 'dummy' stream session with state LISTENING to be used in session
241 * lookups, prior to establishing connection. Requests transport to build
242 * it's own specific listening connection.
245 application_start_listen (application_t * srv, session_type_t session_type,
246 transport_endpoint_t * tep, u64 * res)
248 segment_manager_t *sm;
252 s = listen_session_new (session_type);
253 s->app_index = srv->index;
255 if (stream_session_listen (s, tep))
258 /* Allocate segment manager. All sessions derived out of a listen session
259 * have fifos allocated by the same segment manager. */
260 sm = application_alloc_segment_manager (srv);
264 /* Add to app's listener table. Useful to find all child listeners
265 * when app goes down, although, just for unbinding this is not needed */
266 handle = listen_session_get_handle (s);
267 hash_set (srv->listeners_table, handle, segment_manager_index (sm));
273 listen_session_del (s);
278 * Stop listening on session associated to handle
281 application_stop_listen (application_t * srv, u64 handle)
283 stream_session_t *listener;
285 segment_manager_t *sm;
287 if (srv && hash_get (srv->listeners_table, handle) == 0)
289 clib_warning ("app doesn't own handle %llu!", handle);
293 listener = listen_session_get_from_handle (handle);
294 stream_session_stop_listen (listener);
296 indexp = hash_get (srv->listeners_table, handle);
299 sm = segment_manager_get (*indexp);
300 segment_manager_del (sm);
301 srv->first_segment_manager = ~0;
302 hash_unset (srv->listeners_table, handle);
303 listen_session_del (listener);
309 application_open_session (application_t * app, session_type_t sst,
310 transport_endpoint_t * tep, u32 api_context)
312 segment_manager_t *sm;
313 transport_connection_t *tc = 0;
316 /* Make sure we have a segment manager for connects */
317 if (app->connects_seg_manager == (u32) ~ 0)
319 sm = application_alloc_segment_manager (app);
322 app->connects_seg_manager = segment_manager_index (sm);
325 if ((rv = stream_session_open (app->index, sst, tep, &tc)))
328 /* Store api_context for when the reply comes. Not the nicest thing
329 * but better allocating a separate half-open pool. */
330 tc->s_index = api_context;
336 application_get_connect_segment_manager (application_t * app)
338 ASSERT (app->connects_seg_manager != (u32) ~ 0);
339 return segment_manager_get (app->connects_seg_manager);
343 application_get_listen_segment_manager (application_t * app,
344 stream_session_t * s)
347 smp = hash_get (app->listeners_table, listen_session_get_handle (s));
349 return segment_manager_get (*smp);
353 app_get_name_from_reg_index (application_t * app)
357 vl_api_registration_t *regp;
358 regp = vl_api_client_index_to_registration (app->api_client_index);
360 app_name = format (0, "builtin-%d%c", app->index, 0);
362 app_name = format (0, "%s%c", regp->name, 0);
368 format_application_listener (u8 * s, va_list * args)
370 application_t *app = va_arg (*args, application_t *);
371 u64 handle = va_arg (*args, u64);
372 u32 index = va_arg (*args, u32);
373 int verbose = va_arg (*args, int);
374 stream_session_t *listener;
380 s = format (s, "%-40s%-20s%-15s%-15s%-10s", "Connection", "App",
381 "API Client", "ListenerID", "SegManager");
383 s = format (s, "%-40s%-20s", "Connection", "App");
388 app_name = app_get_name_from_reg_index (app);
389 listener = listen_session_get_from_handle (handle);
390 str = format (0, "%U", format_stream_session, listener, verbose);
394 s = format (s, "%-40s%-20s%-15u%-15u%-10u", str, app_name,
395 app->api_client_index, handle, index);
398 s = format (s, "%-40s%-20s", str, app_name);
405 application_format_connects (application_t * app, int verbose)
407 vlib_main_t *vm = vlib_get_main ();
408 segment_manager_t *sm;
409 u8 *app_name, *s = 0;
416 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
417 "API Client", "SegManager");
419 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
424 if (app->connects_seg_manager == (u32) ~ 0)
427 app_name = app_get_name_from_reg_index (app);
429 /* Across all fifo segments */
430 sm = segment_manager_get (app->connects_seg_manager);
431 for (j = 0; j < vec_len (sm->segment_indices); j++)
433 svm_fifo_segment_private_t *fifo_segment;
437 fifo_segment = svm_fifo_get_segment (sm->segment_indices[j]);
438 fifo = svm_fifo_segment_get_fifo_list (fifo_segment);
441 u32 session_index, thread_index;
442 stream_session_t *session;
444 session_index = fifo->master_session_index;
445 thread_index = fifo->master_thread_index;
447 session = stream_session_get (session_index, thread_index);
448 str = format (0, "%U", format_stream_session, session, verbose);
451 s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
452 app->api_client_index, app->connects_seg_manager);
454 s = format (s, "%-40s%-20s", str, app_name);
456 vlib_cli_output (vm, "%v", s);
457 vec_reset_length (s);
469 format_application (u8 * s, va_list * args)
471 application_t *app = va_arg (*args, application_t *);
472 CLIB_UNUSED (int verbose) = va_arg (*args, int);
478 s = format (s, "%-10s%-20s%-15s%-15s%-15s%-15s", "Index", "Name",
479 "API Client", "Add seg size", "Rx fifo size",
482 s = format (s, "%-10s%-20s%-20s", "Index", "Name", "API Client");
486 app_name = app_get_name_from_reg_index (app);
488 s = format (s, "%-10d%-20s%-15d%-15d%-15d%-15d", app->index, app_name,
489 app->api_client_index, app->sm_properties.add_segment_size,
490 app->sm_properties.rx_fifo_size,
491 app->sm_properties.tx_fifo_size);
493 s = format (s, "%-10d%-20s%-20d", app->index, app_name,
494 app->api_client_index);
498 static clib_error_t *
499 show_app_command_fn (vlib_main_t * vm, unformat_input_t * input,
500 vlib_cli_command_t * cmd)
507 if (!session_manager_is_enabled ())
509 clib_error_return (0, "session layer is not enabled");
512 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
514 if (unformat (input, "server"))
516 else if (unformat (input, "client"))
518 else if (unformat (input, "verbose"))
528 if (pool_elts (app_pool))
530 vlib_cli_output (vm, "%U", format_application_listener,
531 0 /* header */ , 0, 0,
534 pool_foreach (app, app_pool,
536 /* App's listener sessions */
537 if (hash_elts (app->listeners_table) == 0)
539 hash_foreach (handle, index, app->listeners_table,
541 vlib_cli_output (vm, "%U", format_application_listener, app,
542 handle, index, verbose);
548 vlib_cli_output (vm, "No active server bindings");
553 if (pool_elts (app_pool))
555 application_format_connects (0, verbose);
558 pool_foreach (app, app_pool,
560 if (app->connects_seg_manager == (u32)~0)
562 application_format_connects (app, verbose);
567 vlib_cli_output (vm, "No active client bindings");
570 /* Print app related info */
571 if (!do_server && !do_client)
573 vlib_cli_output (vm, "%U", format_application, 0, verbose);
574 pool_foreach (app, app_pool, (
576 vlib_cli_output (vm, "%U",
577 format_application, app,
587 VLIB_CLI_COMMAND (show_app_command, static) =
590 .short_help = "show app [server|client] [verbose]",
591 .function = show_app_command_fn,
596 * fd.io coding-style-patch-verification: ON
599 * eval: (c-set-style "gnu")