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;
88 application_del (application_t * app)
90 api_main_t *am = &api_main;
92 segment_manager_t *sm;
94 u32 index, *handles = 0;
96 vnet_unbind_args_t _a, *a = &_a;
99 * Cleanup segment managers
101 if (app->connects_seg_manager != (u32) ~ 0)
103 sm = segment_manager_get (app->connects_seg_manager);
104 segment_manager_del (sm);
108 hash_foreach (handle, index, app->listeners_table,
110 vec_add1 (handles, handle);
114 /* Actual listener cleanup */
115 for (i = 0; i < vec_len (handles); i++)
117 a->app_index = app->api_client_index;
118 a->handle = handles[i];
119 /* seg manager is removed when unbind completes */
124 * Free the event fifo in the /vpe-api shared-memory segment
126 oldheap = svm_push_data_heap (am->vlib_rp);
127 if (app->event_queue)
128 unix_shared_memory_queue_free (app->event_queue);
129 svm_pop_heap (oldheap);
131 application_table_del (app);
132 pool_put (app_pool, app);
136 application_verify_cb_fns (session_cb_vft_t * cb_fns)
138 if (cb_fns->session_accept_callback == 0)
139 clib_warning ("No accept callback function provided");
140 if (cb_fns->session_connected_callback == 0)
141 clib_warning ("No session connected callback function provided");
142 if (cb_fns->session_disconnect_callback == 0)
143 clib_warning ("No session disconnect callback function provided");
144 if (cb_fns->session_reset_callback == 0)
145 clib_warning ("No session reset callback function provided");
149 application_init (application_t * app, u32 api_client_index, u64 * options,
150 session_cb_vft_t * cb_fns)
152 api_main_t *am = &api_main;
153 segment_manager_t *sm;
154 segment_manager_properties_t *props;
156 u32 app_evt_queue_size;
159 app_evt_queue_size = options[APP_EVT_QUEUE_SIZE] > 0 ?
160 options[APP_EVT_QUEUE_SIZE] : default_app_evt_queue_size;
162 /* Allocate event fifo in the /vpe-api shared-memory segment */
163 oldheap = svm_push_data_heap (am->vlib_rp);
165 /* Allocate server event queue */
167 unix_shared_memory_queue_init (app_evt_queue_size,
168 sizeof (session_fifo_event_t),
169 0 /* consumer pid */ ,
171 /* (do not) signal when queue non-empty */
174 svm_pop_heap (oldheap);
176 /* Setup segment manager */
177 sm = segment_manager_new ();
178 sm->app_index = app->index;
179 props = &app->sm_properties;
180 props->add_segment_size = options[SESSION_OPTIONS_ADD_SEGMENT_SIZE];
181 props->rx_fifo_size = options[SESSION_OPTIONS_RX_FIFO_SIZE];
182 props->tx_fifo_size = options[SESSION_OPTIONS_TX_FIFO_SIZE];
183 props->add_segment = props->add_segment_size != 0;
185 if ((rv = segment_manager_init (sm, props,
186 options[SESSION_OPTIONS_SEGMENT_SIZE])))
189 app->first_segment_manager = segment_manager_index (sm);
190 app->api_client_index = api_client_index;
191 app->flags = options[SESSION_OPTIONS_FLAGS];
192 app->cb_fns = *cb_fns;
194 /* Check that the obvious things are properly set up */
195 application_verify_cb_fns (cb_fns);
197 /* Add app to lookup by api_client_index table */
198 application_table_add (app);
204 application_get (u32 index)
206 return pool_elt_at_index (app_pool, index);
210 application_get_if_valid (u32 index)
212 if (pool_is_free_index (app_pool, index))
215 return pool_elt_at_index (app_pool, index);
219 application_get_index (application_t * app)
221 return app - app_pool;
224 static segment_manager_t *
225 application_alloc_segment_manager (application_t * app)
227 segment_manager_t *sm = 0;
229 if (app->first_segment_manager != (u32) ~ 0)
231 sm = segment_manager_get (app->first_segment_manager);
232 app->first_segment_manager = ~0;
236 sm = segment_manager_new ();
237 if (segment_manager_init (sm, &app->sm_properties, 0))
243 * Start listening local transport endpoint for requested transport.
245 * Creates a 'dummy' stream session with state LISTENING to be used in session
246 * lookups, prior to establishing connection. Requests transport to build
247 * it's own specific listening connection.
250 application_start_listen (application_t * srv, session_type_t session_type,
251 transport_endpoint_t * tep, u64 * res)
253 segment_manager_t *sm;
257 s = listen_session_new (session_type);
258 s->app_index = srv->index;
260 if (stream_session_listen (s, tep))
263 /* Allocate segment manager. All sessions derived out of a listen session
264 * have fifos allocated by the same segment manager. */
265 sm = application_alloc_segment_manager (srv);
269 /* Add to app's listener table. Useful to find all child listeners
270 * when app goes down, although, just for unbinding this is not needed */
271 handle = listen_session_get_handle (s);
272 hash_set (srv->listeners_table, handle, segment_manager_index (sm));
278 listen_session_del (s);
283 * Stop listening on session associated to handle
286 application_stop_listen (application_t * srv, u64 handle)
288 stream_session_t *listener;
290 segment_manager_t *sm;
292 if (srv && hash_get (srv->listeners_table, handle) == 0)
294 clib_warning ("app doesn't own handle %llu!", handle);
298 listener = listen_session_get_from_handle (handle);
299 stream_session_stop_listen (listener);
301 indexp = hash_get (srv->listeners_table, handle);
304 sm = segment_manager_get (*indexp);
305 segment_manager_del (sm);
306 hash_unset (srv->listeners_table, handle);
307 listen_session_del (listener);
313 application_open_session (application_t * app, session_type_t sst,
314 transport_endpoint_t * tep, u32 api_context)
316 segment_manager_t *sm;
317 transport_connection_t *tc = 0;
320 /* Make sure we have a segment manager for connects */
321 if (app->connects_seg_manager == (u32) ~ 0)
323 sm = application_alloc_segment_manager (app);
326 app->connects_seg_manager = segment_manager_index (sm);
329 if ((rv = stream_session_open (app->index, sst, tep, &tc)))
332 /* Store api_context for when the reply comes. Not the nicest thing
333 * but better allocating a separate half-open pool. */
334 tc->s_index = api_context;
340 application_get_connect_segment_manager (application_t * app)
342 ASSERT (app->connects_seg_manager != (u32) ~ 0);
343 return segment_manager_get (app->connects_seg_manager);
347 application_get_listen_segment_manager (application_t * app,
348 stream_session_t * s)
351 smp = hash_get (app->listeners_table, listen_session_get_handle (s));
353 return segment_manager_get (*smp);
357 app_get_name_from_reg_index (application_t * app)
361 vl_api_registration_t *regp;
362 regp = vl_api_client_index_to_registration (app->api_client_index);
364 app_name = format (0, "builtin-%d%c", app->index, 0);
366 app_name = format (0, "%s%c", regp->name, 0);
372 format_application_listener (u8 * s, va_list * args)
374 application_t *app = va_arg (*args, application_t *);
375 u64 handle = va_arg (*args, u64);
376 u32 index = va_arg (*args, u32);
377 int verbose = va_arg (*args, int);
378 stream_session_t *listener;
384 s = format (s, "%-40s%-20s%-15s%-15s%-10s", "Connection", "App",
385 "API Client", "ListenerID", "SegManager");
387 s = format (s, "%-40s%-20s", "Connection", "App");
392 app_name = app_get_name_from_reg_index (app);
393 listener = listen_session_get_from_handle (handle);
394 str = format (0, "%U", format_stream_session, listener, verbose);
398 s = format (s, "%-40s%-20s%-15u%-15u%-10u", str, app_name,
399 app->api_client_index, handle, index);
402 s = format (s, "%-40s%-20s", str, app_name);
409 application_format_connects (application_t * app, int verbose)
411 vlib_main_t *vm = vlib_get_main ();
412 segment_manager_t *sm;
413 u8 *app_name, *s = 0;
420 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
421 "API Client", "SegManager");
423 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
428 if (app->connects_seg_manager == (u32) ~ 0)
431 app_name = app_get_name_from_reg_index (app);
433 /* Across all fifo segments */
434 sm = segment_manager_get (app->connects_seg_manager);
435 for (j = 0; j < vec_len (sm->segment_indices); j++)
437 svm_fifo_segment_private_t *fifo_segment;
441 fifo_segment = svm_fifo_get_segment (sm->segment_indices[j]);
442 fifos = svm_fifo_segment_get_fifos (fifo_segment);
443 for (i = 0; i < vec_len (fifos); i++)
446 u32 session_index, thread_index;
447 stream_session_t *session;
449 /* There are 2 fifos/session. Avoid printing twice. */
454 session_index = fifo->server_session_index;
455 thread_index = fifo->server_thread_index;
457 session = stream_session_get (session_index, thread_index);
458 str = format (0, "%U", format_stream_session, session, verbose);
461 s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
462 app->api_client_index, app->connects_seg_manager);
464 s = format (s, "%-40s%-20s", str, app_name);
466 vlib_cli_output (vm, "%v", s);
468 vec_reset_length (s);
478 format_application (u8 * s, va_list * args)
480 application_t *app = va_arg (*args, application_t *);
481 CLIB_UNUSED (int verbose) = va_arg (*args, int);
487 s = format (s, "%-10s%-20s%-15s%-15s%-15s%-15s", "Index", "Name",
488 "API Client", "Add seg size", "Rx fifo size",
491 s = format (s, "%-10s%-20s%-20s", "Index", "Name", "API Client");
495 app_name = app_get_name_from_reg_index (app);
497 s = format (s, "%-10d%-20s%-15d%-15d%-15d%-15d", app->index, app_name,
498 app->api_client_index, app->sm_properties.add_segment_size,
499 app->sm_properties.rx_fifo_size,
500 app->sm_properties.tx_fifo_size);
502 s = format (s, "%-10d%-20s%-20d", app->index, app_name,
503 app->api_client_index);
507 static clib_error_t *
508 show_app_command_fn (vlib_main_t * vm, unformat_input_t * input,
509 vlib_cli_command_t * cmd)
516 if (!session_manager_is_enabled ())
518 clib_error_return (0, "session layer is not enabled");
521 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
523 if (unformat (input, "server"))
525 else if (unformat (input, "client"))
527 else if (unformat (input, "verbose"))
537 if (pool_elts (app_pool))
539 vlib_cli_output (vm, "%U", format_application_listener,
540 0 /* header */ , 0, 0,
543 pool_foreach (app, app_pool,
545 /* App's listener sessions */
546 if (hash_elts (app->listeners_table) == 0)
548 hash_foreach (handle, index, app->listeners_table,
550 vlib_cli_output (vm, "%U", format_application_listener, app,
551 handle, index, verbose);
557 vlib_cli_output (vm, "No active server bindings");
562 if (pool_elts (app_pool))
564 application_format_connects (0, verbose);
567 pool_foreach (app, app_pool,
569 if (app->connects_seg_manager == (u32)~0)
571 application_format_connects (app, verbose);
576 vlib_cli_output (vm, "No active client bindings");
579 /* Print app related info */
580 if (!do_server && !do_client)
582 vlib_cli_output (vm, "%U", format_application, 0, verbose);
583 pool_foreach (app, app_pool, (
585 vlib_cli_output (vm, "%U",
586 format_application, app,
596 VLIB_CLI_COMMAND (show_app_command, static) =
599 .short_help = "show app [server|client] [verbose]",
600 .function = show_app_command_fn,
605 * fd.io coding-style-patch-verification: ON
608 * eval: (c-set-style "gnu")