2 This file is part of GNUnet
3 (C) 2008--2012 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
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
225 * Task for starting peers
227 * @param cls the RunHandle
228 * @param tc the task context from scheduler
231 start_peers_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
233 struct RunContext *rc = cls;
234 struct DLLOperation *dll_op;
237 LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting Peers\n");
238 for (peer = 0; peer < rc->num_peers; peer++)
240 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
241 dll_op->op = GNUNET_TESTBED_peer_start (NULL, rc->peers[peer], NULL, NULL);
242 dll_op->cls = rc->peers[peer];
243 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail, dll_op);
250 * Functions of this signature are called when a peer has been successfully
253 * @param cls the closure from GNUNET_TESTBED_peer_create()
254 * @param peer the handle for the created peer; NULL on any error during
256 * @param emsg NULL if peer is not NULL; else MAY contain the error description
259 peer_create_cb (void *cls, struct GNUNET_TESTBED_Peer *peer, const char *emsg)
261 struct DLLOperation *dll_op = cls;
262 struct RunContext *rc;
264 GNUNET_assert (NULL != dll_op);
266 GNUNET_assert (NULL != rc);
267 GNUNET_CONTAINER_DLL_remove (rc->dll_op_head, rc->dll_op_tail, dll_op);
268 GNUNET_TESTBED_operation_done (dll_op->op);
269 GNUNET_free (dll_op);
273 LOG (GNUNET_ERROR_TYPE_WARNING, "Error while creating a peer: %s\n",
275 /* FIXME: GNUNET_TESTBED_shutdown_run()? */
278 rc->peers[rc->peer_count] = peer;
280 if (rc->peer_count < rc->num_peers)
282 LOG (GNUNET_ERROR_TYPE_DEBUG, "Required peers created successfully\n");
283 GNUNET_SCHEDULER_add_now (&start_peers_task, rc);
288 * Assuming all peers have been destroyed cleanup run handle
290 * @param cls the run handle
291 * @param tc the task context from scheduler
294 cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
296 struct RunContext *rc = cls;
297 struct DLLOperation *dll_op;
299 GNUNET_assert (NULL == rc->peers);
300 GNUNET_assert (RC_PEERS_DESTROYED == rc->state);
302 GNUNET_TESTBED_controller_disconnect (rc->c);
303 if (NULL != rc->cproc)
304 GNUNET_TESTBED_controller_stop (rc->cproc);
306 GNUNET_TESTBED_host_destroy (rc->h);
307 if (NULL != rc->dll_op_head)
309 LOG (GNUNET_ERROR_TYPE_WARNING,
310 _("Some operations are still pending. Cancelling them\n"));
311 while (NULL != (dll_op = rc->dll_op_head))
313 GNUNET_TESTBED_operation_done (dll_op->op);
314 GNUNET_CONTAINER_DLL_remove (rc->dll_op_head, rc->dll_op_tail, dll_op);
315 GNUNET_free (dll_op);
323 * Task to call master task
325 * @param cls the run context
326 * @param tc the task context
329 call_master (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
331 struct RunContext *rc = cls;
333 if (NULL != rc->topology_operation)
335 GNUNET_TESTBED_operation_done (rc->topology_operation);
336 rc->topology_operation = NULL;
338 if (NULL != rc->master)
339 GNUNET_SCHEDULER_add_continuation (rc->master, rc->master_cls,
340 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
345 * Signature of the event handler function called by the
346 * respective event controller.
349 * @param event information about the event
352 event_cb (void *cls, const struct GNUNET_TESTBED_EventInformation *event)
354 struct RunContext *rc = cls;
355 struct DLLOperation *dll_op;
356 unsigned int peer_id;
358 if (NULL != rc->topology_operation)
362 case GNUNET_TESTBED_ET_OPERATION_FINISHED:
363 case GNUNET_TESTBED_ET_CONNECT:
369 if (rc->oc_count == rc->num_oc)
371 rc->state = RC_READY;
372 GNUNET_SCHEDULER_add_continuation (&call_master, rc,
373 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
377 if ((RC_INIT != rc->state) &&
378 ((GNUNET_TESTBED_ET_OPERATION_FINISHED == event->type) ||
379 (GNUNET_TESTBED_ET_PEER_STOP == event->type)))
381 for (dll_op = rc->dll_op_head; NULL != dll_op; dll_op = dll_op->next)
383 if ((GNUNET_TESTBED_ET_OPERATION_FINISHED == event->type) &&
384 (event->details.operation_finished.operation == dll_op->op))
386 if ((GNUNET_TESTBED_ET_PEER_STOP == event->type) &&
387 (event->details.peer_stop.peer == dll_op->cls))
392 GNUNET_CONTAINER_DLL_remove (rc->dll_op_head, rc->dll_op_tail, dll_op);
393 GNUNET_TESTBED_operation_done (dll_op->op);
394 GNUNET_free (dll_op);
396 if (rc->peer_count < rc->num_peers)
401 rc->state = RC_PEERS_STOPPED;
403 for (peer_id = 0; peer_id < rc->num_peers; peer_id++)
405 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
406 dll_op->op = GNUNET_TESTBED_peer_destroy (rc->peers[peer_id]);
407 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail,
411 case RC_PEERS_STOPPED:
412 rc->state = RC_PEERS_DESTROYED;
413 GNUNET_free (rc->peers);
415 LOG (GNUNET_ERROR_TYPE_DEBUG, "All peers successfully destroyed\n");
416 GNUNET_SCHEDULER_add_now (&cleanup_task, rc);
425 if ((0 != (rc->event_mask && (1LL << event->type))) && (NULL != rc->cc))
426 rc->cc (rc->cc_cls, event);
427 if (GNUNET_TESTBED_ET_PEER_START != event->type)
429 for (dll_op = rc->dll_op_head; NULL != dll_op; dll_op = dll_op->next)
430 if ((NULL != dll_op->cls) &&
431 (event->details.peer_start.peer == dll_op->cls))
433 GNUNET_assert (NULL != dll_op);
434 GNUNET_CONTAINER_DLL_remove (rc->dll_op_head, rc->dll_op_tail, dll_op);
435 GNUNET_TESTBED_operation_done (dll_op->op);
436 GNUNET_free (dll_op);
438 if (rc->peer_count < rc->num_peers)
440 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peers started successfully\n");
441 if (GNUNET_TESTBED_TOPOLOGY_NONE != rc->topology)
443 if ( (GNUNET_TESTBED_TOPOLOGY_ERDOS_RENYI == rc->topology)
444 || (GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD_RING == rc->topology)
445 || (GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD == rc->topology))
447 unsigned int rand_links;
449 switch (rc->topology)
451 case GNUNET_TESTBED_TOPOLOGY_ERDOS_RENYI:
452 rand_links = rc->num_oc;
454 case GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD_RING:
455 rand_links = rc->num_oc - rc->num_peers;
457 case GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD:
458 rand_links = GNUNET_TESTBED_2dtorus_calc_links (rc->num_peers, NULL, NULL);
464 rc->topology_operation =
465 GNUNET_TESTBED_overlay_configure_topology (NULL,
470 GNUNET_TESTBED_TOPOLOGY_OPTION_END);
473 rc->topology_operation =
474 GNUNET_TESTBED_overlay_configure_topology (NULL,
478 GNUNET_TESTBED_TOPOLOGY_OPTION_END);
479 if (NULL == rc->topology_operation)
480 LOG (GNUNET_ERROR_TYPE_WARNING,
481 "Not generating topology. Check number of peers\n");
485 rc->state = RC_READY;
486 GNUNET_SCHEDULER_add_continuation (&call_master, rc,
487 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
493 * Callback to signal successfull startup of the controller process
495 * @param cls the closure from GNUNET_TESTBED_controller_start()
496 * @param cfg the configuration with which the controller has been started;
497 * NULL if status is not GNUNET_OK
498 * @param status GNUNET_OK if the startup is successfull; GNUNET_SYSERR if not,
499 * GNUNET_TESTBED_controller_stop() shouldn't be called in this case
502 controller_status_cb (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg,
505 struct RunContext *rc = cls;
506 struct DLLOperation *dll_op;
510 if (status != GNUNET_OK)
512 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Testbed startup failed\n");
515 event_mask = rc->event_mask;
516 event_mask |= (1LL << GNUNET_TESTBED_ET_PEER_STOP);
517 event_mask |= (1LL << GNUNET_TESTBED_ET_OPERATION_FINISHED);
518 if (rc->topology < GNUNET_TESTBED_TOPOLOGY_NONE)
519 event_mask |= GNUNET_TESTBED_ET_CONNECT;
521 GNUNET_TESTBED_controller_connect (cfg, rc->h, event_mask, &event_cb, rc);
523 GNUNET_malloc (sizeof (struct GNUNET_TESTBED_Peer *) * rc->num_peers);
524 GNUNET_assert (NULL != rc->c);
526 for (peer = 0; peer < rc->num_peers; peer++)
528 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
531 GNUNET_TESTBED_peer_create (rc->c, rc->h, cfg, peer_create_cb, dll_op);
532 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail, dll_op);
538 * Stops the testbed run and releases any used resources
540 * @param cls the tesbed run handle
541 * @param tc the task context from scheduler
544 shutdown_run_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
546 struct RunContext *rc = cls;
547 struct DLLOperation *dll_op;
552 if (NULL != rc->peers)
554 if (NULL != rc->topology_operation)
556 GNUNET_TESTBED_operation_done (rc->topology_operation);
557 rc->topology_operation = NULL;
559 if (RC_INIT == rc->state)
560 rc->state = RC_READY; /* Even though we haven't called the master callback */
562 /* Check if some peers are stopped */
563 for (peer = 0; peer < rc->num_peers; peer++)
565 if (PS_STOPPED != rc->peers[peer]->state)
568 if (peer == rc->num_peers)
570 /* All peers are stopped */
571 rc->state = RC_PEERS_STOPPED;
572 for (peer = 0; peer < rc->num_peers; peer++)
574 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
575 dll_op->op = GNUNET_TESTBED_peer_destroy (rc->peers[peer]);
576 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail,
581 /* Some peers are stopped */
582 for (peer = 0; peer < rc->num_peers; peer++)
584 if (PS_STARTED != rc->peers[peer]->state)
589 dll_op = GNUNET_malloc (sizeof (struct DLLOperation));
590 dll_op->op = GNUNET_TESTBED_peer_stop (rc->peers[peer], NULL, NULL);
591 dll_op->cls = rc->peers[peer];
592 GNUNET_CONTAINER_DLL_insert_tail (rc->dll_op_head, rc->dll_op_tail,
595 if (rc->peer_count != rc->num_peers)
599 rc->state = RC_PEERS_DESTROYED; /* No peers are present so we consider the
600 * state where all peers are destroyed */
601 GNUNET_SCHEDULER_add_now (&cleanup_task, rc);
606 * Convenience method for running a testbed with
607 * a single call. Underlay and overlay topology
608 * are configured using the "UNDERLAY" and "OVERLAY"
609 * options in the "[testbed]" section of the configuration\
610 * (with possible options given in "UNDERLAY_XXX" and/or
613 * The testbed is to be terminated using a call to
614 * "GNUNET_SCHEDULER_shutdown".
616 * @param host_filename name of the file with the 'hosts', NULL
617 * to run everything on 'localhost'
618 * @param cfg configuration to use (for testbed, controller and peers)
619 * @param num_peers number of peers to start; FIXME: maybe put that ALSO into cfg?
620 * @param event_mask bit mask with set of events to call 'cc' for;
621 * or-ed values of "1LL" shifted by the
622 * respective 'enum GNUNET_TESTBED_EventType'
623 * (i.e. "(1LL << GNUNET_TESTBED_ET_CONNECT) || ...")
624 * @param cc controller callback to invoke on events; This callback is called
625 * for all peer start events even if GNUNET_TESTBED_ET_PEER_START isn't
626 * set in the event_mask as this is the only way get access to the
627 * handle of each peer
628 * @param cc_cls closure for cc
629 * @param master task to run once the testbed is ready
633 GNUNET_TESTBED_run (const char *host_filename,
634 const struct GNUNET_CONFIGURATION_Handle *cfg,
635 unsigned int num_peers, uint64_t event_mask,
636 GNUNET_TESTBED_ControllerCallback cc, void *cc_cls,
637 GNUNET_SCHEDULER_Task master, void *master_cls)
639 struct RunContext *rc;
641 unsigned long long random_links;
643 GNUNET_break (NULL == host_filename); /* Currently we do not support host
645 GNUNET_assert (NULL != cc);
646 GNUNET_assert (num_peers > 0);
647 host_filename = NULL;
648 rc = GNUNET_malloc (sizeof (struct RunContext));
649 rc->h = GNUNET_TESTBED_host_create (NULL, NULL, 0);
650 GNUNET_assert (NULL != rc->h);
652 GNUNET_TESTBED_controller_start ("127.0.0.1", rc->h, cfg,
653 &controller_status_cb, rc);
654 GNUNET_assert (NULL != rc->cproc);
655 rc->num_peers = num_peers;
656 rc->event_mask = event_mask;
657 rc->event_mask |= (1LL << GNUNET_TESTBED_ET_PEER_START);
661 rc->master_cls = master_cls;
663 rc->topology = GNUNET_TESTBED_TOPOLOGY_NONE;
664 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg, "testbed",
668 if (0 == strcasecmp (topology, "RANDOM"))
670 rc->topology = GNUNET_TESTBED_TOPOLOGY_ERDOS_RENYI;
672 else if (0 == strcasecmp (topology, "SMALL_WORLD_RING"))
674 rc->topology = GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD_RING;
675 rc->num_oc = num_peers;
677 else if (0 == strcasecmp (topology, "SMALL_WORLD"))
679 rc->topology = GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD;
680 rc->num_oc = GNUNET_TESTBED_2dtorus_calc_links (num_peers, NULL, NULL);
682 else if (0 == strcasecmp (topology, "CLIQUE"))
684 rc->topology = GNUNET_TESTBED_TOPOLOGY_CLIQUE;
685 rc->num_oc = num_peers * (num_peers - 1);
687 else if (0 == strcasecmp (topology, "LINE"))
689 rc->topology = GNUNET_TESTBED_TOPOLOGY_LINE;
690 rc->num_oc = num_peers - 1;
692 else if (0 == strcasecmp (topology, "RING"))
694 rc->topology = GNUNET_TESTBED_TOPOLOGY_RING;
695 rc->num_oc = num_peers;
697 else if (0 == strcasecmp (topology, "2D_TORUS"))
699 rc->topology = GNUNET_TESTBED_TOPOLOGY_2D_TORUS;
700 rc->num_oc = GNUNET_TESTBED_2dtorus_calc_links (num_peers, NULL, NULL);
703 LOG (GNUNET_ERROR_TYPE_WARNING,
704 "Unknown topology %s given in configuration\n", topology);
705 GNUNET_free (topology);
707 if ( (GNUNET_TESTBED_TOPOLOGY_ERDOS_RENYI == rc->topology)
708 || (GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD_RING == rc->topology)
709 || (GNUNET_TESTBED_TOPOLOGY_SMALL_WORLD == rc->topology))
711 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "testbed",
712 "OVERLAY_RANDOM_LINKS",
715 /* OVERLAY option RANDOM & SMALL_WORLD_RING requires OVERLAY_RANDOM_LINKS
716 option to be set to the number of random links to be established */
721 if (random_links > UINT32_MAX)
723 GNUNET_break (0); /* Too big number */
727 rc->num_oc += (unsigned int) random_links;
729 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
730 &shutdown_run_task, rc);
735 * Configure and run a testbed using the given
736 * master controller on 'num_hosts' starting
737 * 'num_peers' using the given peer configuration.
739 * @param controller master controller for the testbed
740 * (must not be destroyed until after the
741 * testbed is destroyed).
742 * @param num_hosts number of hosts in 'hosts', 0 to only
744 * @param hosts list of hosts to use for the testbed
745 * @param num_peers number of peers to start
746 * @param cfg the configuration to use as a template for peers and also for
747 * checking the value of testbed helper binary
748 * @param underlay_topology underlay topology to create
749 * @param va topology-specific options
750 * @return handle to the testbed; NULL upon error (error messaage will be printed)
752 struct GNUNET_TESTBED_Testbed *
753 GNUNET_TESTBED_create_va (struct GNUNET_TESTBED_Controller *controller,
754 unsigned int num_hosts,
755 struct GNUNET_TESTBED_Host **hosts,
756 unsigned int num_peers,
757 const struct GNUNET_CONFIGURATION_Handle *cfg,
758 enum GNUNET_TESTBED_TopologyOption underlay_topology,
763 GNUNET_assert (underlay_topology < GNUNET_TESTBED_TOPOLOGY_NONE);
766 for (nhost = 0; nhost < num_hosts; nhost++)
768 if (GNUNET_YES != GNUNET_TESTBED_is_host_habitable (hosts[nhost], cfg))
770 LOG (GNUNET_ERROR_TYPE_ERROR, _("Host %s cannot start testbed\n"),
771 GNUNET_TESTBED_host_get_hostname_ (hosts[nhost]));
775 if (num_hosts != nhost)
778 /* We need controller callback here to get operation done events while
786 * Configure and run a testbed using the given
787 * master controller on 'num_hosts' starting
788 * 'num_peers' using the given peer configuration.
790 * @param controller master controller for the testbed
791 * (must not be destroyed until after the
792 * testbed is destroyed).
793 * @param num_hosts number of hosts in 'hosts', 0 to only
795 * @param hosts list of hosts to use for the testbed
796 * @param num_peers number of peers to start
797 * @param cfg the configuration to use as a template for peers and also for
798 * checking the value of testbed helper binary
799 * @param underlay_topology underlay topology to create
800 * @param ... topology-specific options
802 struct GNUNET_TESTBED_Testbed *
803 GNUNET_TESTBED_create (struct GNUNET_TESTBED_Controller *controller,
804 unsigned int num_hosts,
805 struct GNUNET_TESTBED_Host **hosts,
806 unsigned int num_peers,
807 const struct GNUNET_CONFIGURATION_Handle *cfg,
808 enum GNUNET_TESTBED_TopologyOption underlay_topology,
811 struct GNUNET_TESTBED_Testbed *testbed;
814 va_start (vargs, underlay_topology);
815 testbed = GNUNET_TESTBED_create_va (controller, num_hosts, hosts, num_peers,
816 cfg, underlay_topology, vargs);
823 * Destroy a testbed. Stops all running peers and then
824 * destroys all peers. Does NOT destroy the master controller.
826 * @param testbed testbed to destroy
829 GNUNET_TESTBED_destroy (struct GNUNET_TESTBED_Testbed *testbed)
835 /* end of testbed_api_testbed.c */