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3 (C) 2008--2012 Christian Grothoff (and other contributing authors)
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22 * @file testbed/testbed_api_testbed.c
23 * @brief high-level testbed management
24 * @author Christian Grothoff
25 * @author Sree Harsha Totakura
29 #include "gnunet_testbed_service.h"
30 #include "testbed_api_peers.h"
31 #include "testbed_api_hosts.h"
32 #include "testbed_api_topology.h"
35 * Generic loggins shorthand
37 #define LOG(kind,...) \
38 GNUNET_log_from (kind, "testbed-api-testbed", __VA_ARGS__)
41 * Opaque handle to an abstract operation to be executed by the testing framework.
43 struct GNUNET_TESTBED_Testbed
48 struct GNUNET_TESTBED_Host **hosts;
51 * The number of hosts in the hosts array
53 unsigned int num_hosts;
56 * The controller handle
58 struct GNUNET_TESTBED_Controller *c;
68 * The testbed operation handle
70 struct GNUNET_TESTBED_Operation *op;
73 * Context information for GNUNET_TESTBED_run()
75 struct RunContext *rc;
83 * The next pointer for DLL
85 struct DLLOperation *next;
88 * The prev pointer for DLL
90 struct DLLOperation *prev;
95 * States of RunContext
105 * The testbed run is ready and the master callback can be called now. At this
106 * time the peers are all started and if a topology is provided in the
107 * configuration the topology would have been attempted
117 * Peers are destroyed
129 * The controller handle
131 struct GNUNET_TESTBED_Controller *c;
134 * Handle to the host on which the controller runs
136 struct GNUNET_TESTBED_Host *h;
139 * The handle to the controller process
141 struct GNUNET_TESTBED_ControllerProc *cproc;
144 * The callback to use as controller callback
146 GNUNET_TESTBED_ControllerCallback cc;
149 * The pointer to the controller callback
154 * Master task to call when testbed initialization is done
156 GNUNET_SCHEDULER_Task master;
159 * The closure for the master task
164 * The head element of DLL operations
166 struct DLLOperation *dll_op_head;
169 * The tail element of DLL operations
171 struct DLLOperation *dll_op_tail;
174 * Array of peers which we create
176 struct GNUNET_TESTBED_Peer **peers;
179 * The topology generation operation. Will be null if no topology is set in
182 struct GNUNET_TESTBED_Operation *topology_operation;
185 * The event mask for the controller
190 * State of this context
195 * The topology which has to be achieved with the peers started in this context
197 enum GNUNET_TESTBED_TopologyOption topology;
200 * Current peer count for an operation; Set this to 0 and increment for each
201 * successful operation on a peer
203 unsigned int peer_count;
206 * number of peers to start
208 unsigned int num_peers;
211 * counter to count overlay connect attempts. This counter includes both
212 * successful and failed overlay connects
214 unsigned int oc_count;
217 * Expected overlay connects. Should be zero if no topology is relavant
222 * Number of random links to established
224 unsigned int random_links;
230 * Task for starting peers
232 * @param cls the RunHandle
233 * @param tc the task context from scheduler
236 start_peers_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
238 struct RunContext *rc = cls;
239 struct DLLOperation *dll_op;
242 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting Peers\n");
243 for (peer = 0; peer < rc->num_peers; peer++)
245 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
246 dll_op->op = GNUNET_TESTBED_peer_start (NULL, rc->peers[peer], NULL, NULL);
247 dll_op->cls = rc->peers[peer];
248 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail, dll_op);
255 * Functions of this signature are called when a peer has been successfully
258 * @param cls the closure from GNUNET_TESTBED_peer_create()
259 * @param peer the handle for the created peer; NULL on any error during
261 * @param emsg NULL if peer is not NULL; else MAY contain the error description
264 peer_create_cb (void *cls, struct GNUNET_TESTBED_Peer *peer, const char *emsg)
266 struct DLLOperation *dll_op = cls;
267 struct RunContext *rc;
269 GNUNET_assert (NULL != dll_op);
271 GNUNET_assert (NULL != rc);
272 GNUNET_CONTAINER_DLL_remove (rc->dll_op_head, rc->dll_op_tail, dll_op);
273 GNUNET_TESTBED_operation_done (dll_op->op);
274 GNUNET_free (dll_op);
278 LOG (GNUNET_ERROR_TYPE_WARNING, "Error while creating a peer: %s\n",
280 /* FIXME: GNUNET_TESTBED_shutdown_run()? */
283 rc->peers[rc->peer_count] = peer;
285 if (rc->peer_count < rc->num_peers)
287 LOG (GNUNET_ERROR_TYPE_DEBUG, "Required peers created successfully\n");
288 GNUNET_SCHEDULER_add_now (&start_peers_task, rc);
293 * Assuming all peers have been destroyed cleanup run handle
295 * @param cls the run handle
296 * @param tc the task context from scheduler
299 cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
301 struct RunContext *rc = cls;
302 struct DLLOperation *dll_op;
304 GNUNET_assert (NULL == rc->peers);
305 GNUNET_assert (RC_PEERS_DESTROYED == rc->state);
307 GNUNET_TESTBED_controller_disconnect (rc->c);
308 if (NULL != rc->cproc)
309 GNUNET_TESTBED_controller_stop (rc->cproc);
311 GNUNET_TESTBED_host_destroy (rc->h);
312 if (NULL != rc->dll_op_head)
314 LOG (GNUNET_ERROR_TYPE_WARNING,
315 _("Some operations are still pending. Cancelling them\n"));
316 while (NULL != (dll_op = rc->dll_op_head))
318 GNUNET_TESTBED_operation_done (dll_op->op);
319 GNUNET_CONTAINER_DLL_remove (rc->dll_op_head, rc->dll_op_tail, dll_op);
320 GNUNET_free (dll_op);
328 * Task to call master task
330 * @param cls the run context
331 * @param tc the task context
334 call_master (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
336 struct RunContext *rc = cls;
338 if (NULL != rc->topology_operation)
340 GNUNET_TESTBED_operation_done (rc->topology_operation);
341 rc->topology_operation = NULL;
343 if (NULL != rc->master)
344 GNUNET_SCHEDULER_add_continuation (rc->master, rc->master_cls,
345 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
350 * Signature of the event handler function called by the
351 * respective event controller.
354 * @param event information about the event
357 event_cb (void *cls, const struct GNUNET_TESTBED_EventInformation *event)
359 struct RunContext *rc = cls;
360 struct DLLOperation *dll_op;
361 unsigned int peer_id;
363 if (NULL != rc->topology_operation)
367 case GNUNET_TESTBED_ET_OPERATION_FINISHED:
368 case GNUNET_TESTBED_ET_CONNECT:
374 if (rc->oc_count == rc->num_oc)
376 rc->state = RC_READY;
377 GNUNET_SCHEDULER_add_continuation (&call_master, rc,
378 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
382 if ((RC_INIT != rc->state) &&
383 ((GNUNET_TESTBED_ET_OPERATION_FINISHED == event->type) ||
384 (GNUNET_TESTBED_ET_PEER_STOP == event->type)))
386 for (dll_op = rc->dll_op_head; NULL != dll_op; dll_op = dll_op->next)
388 if ((GNUNET_TESTBED_ET_OPERATION_FINISHED == event->type) &&
389 (event->details.operation_finished.operation == dll_op->op))
391 if ((GNUNET_TESTBED_ET_PEER_STOP == event->type) &&
392 (event->details.peer_stop.peer == dll_op->cls))
397 GNUNET_CONTAINER_DLL_remove (rc->dll_op_head, rc->dll_op_tail, dll_op);
398 GNUNET_TESTBED_operation_done (dll_op->op);
399 GNUNET_free (dll_op);
401 if (rc->peer_count < rc->num_peers)
406 rc->state = RC_PEERS_STOPPED;
408 for (peer_id = 0; peer_id < rc->num_peers; peer_id++)
410 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
411 dll_op->op = GNUNET_TESTBED_peer_destroy (rc->peers[peer_id]);
412 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail,
416 case RC_PEERS_STOPPED:
417 rc->state = RC_PEERS_DESTROYED;
418 GNUNET_free (rc->peers);
420 LOG (GNUNET_ERROR_TYPE_DEBUG, "All peers successfully destroyed\n");
421 GNUNET_SCHEDULER_add_now (&cleanup_task, rc);
430 if ((0 != (rc->event_mask && (1LL << event->type))) && (NULL != rc->cc))
431 rc->cc (rc->cc_cls, event);
432 if (GNUNET_TESTBED_ET_PEER_START != event->type)
434 for (dll_op = rc->dll_op_head; NULL != dll_op; dll_op = dll_op->next)
435 if ((NULL != dll_op->cls) &&
436 (event->details.peer_start.peer == dll_op->cls))
438 GNUNET_assert (NULL != dll_op);
439 GNUNET_CONTAINER_DLL_remove (rc->dll_op_head, rc->dll_op_tail, dll_op);
440 GNUNET_TESTBED_operation_done (dll_op->op);
441 GNUNET_free (dll_op);
443 if (rc->peer_count < rc->num_peers)
445 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peers started successfully\n");
446 if (GNUNET_TESTBED_TOPOLOGY_NONE != rc->topology)
448 if ( (GNUNET_TESTBED_TOPOLOGY_ERDOS_RENYI == rc->topology)
449 || (GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD_RING == rc->topology)
450 || (GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD == rc->topology))
452 rc->topology_operation =
453 GNUNET_TESTBED_overlay_configure_topology (NULL,
459 GNUNET_TESTBED_TOPOLOGY_OPTION_END);
462 rc->topology_operation =
463 GNUNET_TESTBED_overlay_configure_topology (NULL,
468 GNUNET_TESTBED_TOPOLOGY_OPTION_END);
469 if (NULL == rc->topology_operation)
470 LOG (GNUNET_ERROR_TYPE_WARNING,
471 "Not generating topology. Check number of peers\n");
475 rc->state = RC_READY;
476 GNUNET_SCHEDULER_add_continuation (&call_master, rc,
477 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
483 * Callback to signal successfull startup of the controller process
485 * @param cls the closure from GNUNET_TESTBED_controller_start()
486 * @param cfg the configuration with which the controller has been started;
487 * NULL if status is not GNUNET_OK
488 * @param status GNUNET_OK if the startup is successfull; GNUNET_SYSERR if not,
489 * GNUNET_TESTBED_controller_stop() shouldn't be called in this case
492 controller_status_cb (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg,
495 struct RunContext *rc = cls;
496 struct DLLOperation *dll_op;
500 if (status != GNUNET_OK)
502 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Testbed startup failed\n");
505 event_mask = rc->event_mask;
506 event_mask |= (1LL << GNUNET_TESTBED_ET_PEER_STOP);
507 event_mask |= (1LL << GNUNET_TESTBED_ET_OPERATION_FINISHED);
508 if (rc->topology < GNUNET_TESTBED_TOPOLOGY_NONE)
509 event_mask |= GNUNET_TESTBED_ET_CONNECT;
511 GNUNET_TESTBED_controller_connect (cfg, rc->h, event_mask, &event_cb, rc);
513 GNUNET_malloc (sizeof (struct GNUNET_TESTBED_Peer *) * rc->num_peers);
514 GNUNET_assert (NULL != rc->c);
516 for (peer = 0; peer < rc->num_peers; peer++)
518 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
521 GNUNET_TESTBED_peer_create (rc->c, rc->h, cfg, peer_create_cb, dll_op);
522 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail, dll_op);
528 * Stops the testbed run and releases any used resources
530 * @param cls the tesbed run handle
531 * @param tc the task context from scheduler
534 shutdown_run_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
536 struct RunContext *rc = cls;
537 struct DLLOperation *dll_op;
542 if (NULL != rc->peers)
544 if (NULL != rc->topology_operation)
546 GNUNET_TESTBED_operation_done (rc->topology_operation);
547 rc->topology_operation = NULL;
549 if (RC_INIT == rc->state)
550 rc->state = RC_READY; /* Even though we haven't called the master callback */
552 /* Check if some peers are stopped */
553 for (peer = 0; peer < rc->num_peers; peer++)
555 if (PS_STOPPED != rc->peers[peer]->state)
558 if (peer == rc->num_peers)
560 /* All peers are stopped */
561 rc->state = RC_PEERS_STOPPED;
562 for (peer = 0; peer < rc->num_peers; peer++)
564 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
565 dll_op->op = GNUNET_TESTBED_peer_destroy (rc->peers[peer]);
566 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail,
571 /* Some peers are stopped */
572 for (peer = 0; peer < rc->num_peers; peer++)
574 if (PS_STARTED != rc->peers[peer]->state)
579 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
580 dll_op->op = GNUNET_TESTBED_peer_stop (rc->peers[peer], NULL, NULL);
581 dll_op->cls = rc->peers[peer];
582 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail,
585 if (rc->peer_count != rc->num_peers)
589 rc->state = RC_PEERS_DESTROYED; /* No peers are present so we consider the
590 * state where all peers are destroyed */
591 GNUNET_SCHEDULER_add_now (&cleanup_task, rc);
596 * Convenience method for running a testbed with
597 * a single call. Underlay and overlay topology
598 * are configured using the "UNDERLAY" and "OVERLAY"
599 * options in the "[testbed]" section of the configuration\
600 * (with possible options given in "UNDERLAY_XXX" and/or
603 * The testbed is to be terminated using a call to
604 * "GNUNET_SCHEDULER_shutdown".
606 * @param host_filename name of the file with the 'hosts', NULL
607 * to run everything on 'localhost'
608 * @param cfg configuration to use (for testbed, controller and peers)
609 * @param num_peers number of peers to start; FIXME: maybe put that ALSO into cfg?
610 * @param event_mask bit mask with set of events to call 'cc' for;
611 * or-ed values of "1LL" shifted by the
612 * respective 'enum GNUNET_TESTBED_EventType'
613 * (i.e. "(1LL << GNUNET_TESTBED_ET_CONNECT) || ...")
614 * @param cc controller callback to invoke on events; This callback is called
615 * for all peer start events even if GNUNET_TESTBED_ET_PEER_START isn't
616 * set in the event_mask as this is the only way get access to the
617 * handle of each peer
618 * @param cc_cls closure for cc
619 * @param master task to run once the testbed is ready
623 GNUNET_TESTBED_run (const char *host_filename,
624 const struct GNUNET_CONFIGURATION_Handle *cfg,
625 unsigned int num_peers, uint64_t event_mask,
626 GNUNET_TESTBED_ControllerCallback cc, void *cc_cls,
627 GNUNET_SCHEDULER_Task master, void *master_cls)
629 struct RunContext *rc;
631 unsigned long long random_links;
633 GNUNET_break (NULL == host_filename); /* Currently we do not support host
635 GNUNET_assert (NULL != cc);
636 GNUNET_assert (num_peers > 0);
637 host_filename = NULL;
638 rc = GNUNET_malloc (sizeof (struct RunContext));
639 rc->h = GNUNET_TESTBED_host_create (NULL, NULL, 0);
640 GNUNET_assert (NULL != rc->h);
642 GNUNET_TESTBED_controller_start ("127.0.0.1", rc->h, cfg,
643 &controller_status_cb, rc);
644 GNUNET_assert (NULL != rc->cproc);
645 rc->num_peers = num_peers;
646 rc->event_mask = event_mask;
647 rc->event_mask |= (1LL << GNUNET_TESTBED_ET_PEER_START);
651 rc->master_cls = master_cls;
653 rc->topology = GNUNET_TESTBED_TOPOLOGY_NONE;
654 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg, "testbed",
658 if (GNUNET_NO == GNUNET_TESTBED_topology_get_ (&rc->topology,
661 LOG (GNUNET_ERROR_TYPE_WARNING,
662 "Unknown topology %s given in configuration\n", topology);
664 GNUNET_free (topology);
666 if ( (GNUNET_TESTBED_TOPOLOGY_ERDOS_RENYI == rc->topology)
667 || (GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD_RING == rc->topology)
668 || (GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD == rc->topology))
670 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "testbed",
671 "OVERLAY_RANDOM_LINKS",
674 /* OVERLAY option RANDOM & SMALL_WORLD_RING requires OVERLAY_RANDOM_LINKS
675 option to be set to the number of random links to be established */
680 if (random_links > UINT32_MAX)
682 GNUNET_break (0); /* Too big number */
686 rc->random_links = (unsigned int) random_links;
688 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
689 &shutdown_run_task, rc);
694 * Configure and run a testbed using the given
695 * master controller on 'num_hosts' starting
696 * 'num_peers' using the given peer configuration.
698 * @param controller master controller for the testbed
699 * (must not be destroyed until after the
700 * testbed is destroyed).
701 * @param num_hosts number of hosts in 'hosts', 0 to only
703 * @param hosts list of hosts to use for the testbed
704 * @param num_peers number of peers to start
705 * @param cfg the configuration to use as a template for peers and also for
706 * checking the value of testbed helper binary
707 * @param underlay_topology underlay topology to create
708 * @param va topology-specific options
709 * @return handle to the testbed; NULL upon error (error messaage will be printed)
711 struct GNUNET_TESTBED_Testbed *
712 GNUNET_TESTBED_create_va (struct GNUNET_TESTBED_Controller *controller,
713 unsigned int num_hosts,
714 struct GNUNET_TESTBED_Host **hosts,
715 unsigned int num_peers,
716 const struct GNUNET_CONFIGURATION_Handle *cfg,
717 enum GNUNET_TESTBED_TopologyOption underlay_topology,
722 GNUNET_assert (underlay_topology < GNUNET_TESTBED_TOPOLOGY_NONE);
725 for (nhost = 0; nhost < num_hosts; nhost++)
727 if (GNUNET_YES != GNUNET_TESTBED_is_host_habitable (hosts[nhost], cfg))
729 LOG (GNUNET_ERROR_TYPE_ERROR, _("Host %s cannot start testbed\n"),
730 GNUNET_TESTBED_host_get_hostname_ (hosts[nhost]));
734 if (num_hosts != nhost)
737 /* We need controller callback here to get operation done events while
745 * Configure and run a testbed using the given
746 * master controller on 'num_hosts' starting
747 * 'num_peers' using the given peer configuration.
749 * @param controller master controller for the testbed
750 * (must not be destroyed until after the
751 * testbed is destroyed).
752 * @param num_hosts number of hosts in 'hosts', 0 to only
754 * @param hosts list of hosts to use for the testbed
755 * @param num_peers number of peers to start
756 * @param cfg the configuration to use as a template for peers and also for
757 * checking the value of testbed helper binary
758 * @param underlay_topology underlay topology to create
759 * @param ... topology-specific options
761 struct GNUNET_TESTBED_Testbed *
762 GNUNET_TESTBED_create (struct GNUNET_TESTBED_Controller *controller,
763 unsigned int num_hosts,
764 struct GNUNET_TESTBED_Host **hosts,
765 unsigned int num_peers,
766 const struct GNUNET_CONFIGURATION_Handle *cfg,
767 enum GNUNET_TESTBED_TopologyOption underlay_topology,
770 struct GNUNET_TESTBED_Testbed *testbed;
773 va_start (vargs, underlay_topology);
774 testbed = GNUNET_TESTBED_create_va (controller, num_hosts, hosts, num_peers,
775 cfg, underlay_topology, vargs);
782 * Destroy a testbed. Stops all running peers and then
783 * destroys all peers. Does NOT destroy the master controller.
785 * @param testbed testbed to destroy
788 GNUNET_TESTBED_destroy (struct GNUNET_TESTBED_Testbed *testbed)
794 /* end of testbed_api_testbed.c */