2 * @file frescan_bwres_threads.c
4 * @brief FRESCAN bandwidth reservation layer: negotiation threads
6 * This module contains the acceptor threads and the master thread for local
7 * negotiations, with functions to create them.
13 * @author Daniel Sangorrin <daniel.sangorrin@unican.es>
17 * -----------------------------------------------------------------------
18 * Copyright (C) 2006 - 2008 FRESCOR consortium partners:
20 * Universidad de Cantabria, SPAIN
21 * University of York, UK
22 * Scuola Superiore Sant'Anna, ITALY
23 * Kaiserslautern University, GERMANY
24 * Univ. Politécnica Valencia, SPAIN
25 * Czech Technical University in Prague, CZECH REPUBLIC
27 * Thales Communication S.A. FRANCE
28 * Visual Tools S.A. SPAIN
29 * Rapita Systems Ltd UK
32 * See http://www.frescor.org for a link to partners' websites
34 * FRESCOR project (FP6/2005/IST/5-034026) is funded
35 * in part by the European Union Sixth Framework Programme
36 * The European Union is not liable of any use that may be
39 * This file is part of FRESCAN
41 * FRESCAN is free software; you can redistribute it and/or modify
42 * it under the terms of the GNU General Public License as published by
43 * the Free Software Foundation; either version 2, or (at your option)
46 * FRESCAN is distributed in the hope that it will be useful, but
47 * WITHOUT ANY WARRANTY; without even the implied warranty of
48 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
49 * General Public License for more details.
51 * You should have received a copy of the GNU General Public License
52 * distributed with FRESCAN; see file COPYING. If not, write to the
53 * Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
56 * As a special exception, including FRESCAN header files in a file,
57 * instantiating FRESCAN generics or templates, or linking other files
58 * with FRESCAN objects to produce an executable application, does not
59 * by itself cause the resulting executable application to be covered
60 * by the GNU General Public License. This exception does not
61 * however invalidate any other reasons why the executable file might be
62 * covered by the GNU Public License.
63 * -----------------------------------------------------------------------
68 #include "fosa_threads_and_signals.h" // fosa_thread_attr_init...
69 #include "frescan_bwres_threads.h"
70 #include "frescan_bwres_messages.h"
71 #include "frescan_bwres_requests.h"
72 #include "frescan_bwres_robjs.h"
73 #include "frescan_bwres_analysis.h"
74 #include "frescan_bwres_mode_change.h"
75 #include "frescan_config.h"
76 #include "frescan_debug.h"
77 #include "frescan_data.h"
78 #include "frescan_servers.h"
80 static void *frescan_manager_thread(void *arg);
81 static void *frescan_acceptor_thread(void *arg);
83 static void frescan_manager_gn_prepare_scenario
84 (frescan_bwres_sa_scenario_t *scenario,
85 frescan_bwres_request_data_t *req_data);
87 static void frescan_manager_gn_restore_scenario
88 (frescan_bwres_sa_scenario_t *scenario,
89 frescan_bwres_request_data_t *req_data);
91 static void frescan_manager_req_gn(frescan_bwres_request_data_t *req_data);
92 static void frescan_manager_rep_gn(frescan_bwres_request_data_t *req_data);
93 static void frescan_manager_req_mc(frescan_bwres_request_data_t *req_data);
96 * frescan_manager_thread_create()
98 * This call creates the manager thread at each node which will be waiting
99 * in a request queue for LOCAL or EXTERNAL requests.
102 int frescan_manager_thread_create(frescan_network_t net)
105 fosa_thread_attr_t attr;
107 ret = fosa_thread_attr_init(&attr);
108 if (ret != 0) return ret;
110 ret = fosa_thread_attr_set_prio(&attr, FRESCAN_BWRES_NEG_THREAD_PRIO);
111 if (ret != 0) return ret;
113 ret = fosa_thread_create(&frescan_data[net].manager_thread_id,
115 frescan_manager_thread,
116 (void *)(uint32_t)net);
117 if (ret != 0) return ret;
119 ret = fosa_thread_attr_destroy(&attr);
120 if (ret != 0) return ret;
126 * frescan_acceptor_thread_create()
128 * This call creates the acceptor thread which will be waiting negotiation
129 * messages from the network and converting them into requests.
132 int frescan_acceptor_thread_create(frescan_network_t net)
135 fosa_thread_attr_t attr;
137 ret = fosa_thread_attr_init(&attr);
138 if (ret != 0) return ret;
140 ret = fosa_thread_attr_set_prio(&attr, FRESCAN_BWRES_ACCEPTOR_PRIO);
141 if (ret != 0) return ret;
143 ret = fosa_thread_create(&frescan_data[net].acceptor_thread_id,
145 frescan_acceptor_thread,
146 (void *)(uint32_t)net);
147 if (ret != 0) return ret;
149 ret = fosa_thread_attr_destroy(&attr);
150 if (ret != 0) return ret;
156 * frescan_manager_thread
159 static void *frescan_manager_thread(void *arg)
162 frescan_bwres_request_id_t req;
163 frescan_bwres_request_data_t *req_data;
164 frescan_network_t net = (uint32_t)arg;
166 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG, "manager thread starts\n");
169 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG, "wait for a request\n");
171 ret = frescan_bwres_requests_dequeue(&req);
174 ret = frescan_bwres_requests_get_data(req, &req_data);
177 switch(req_data->type) {
178 case FRESCAN_BWRES_REQ_GN:
179 frescan_manager_req_gn(req_data);
181 case FRESCAN_BWRES_REP_GN:
182 frescan_manager_rep_gn(req_data);
184 case FRESCAN_BWRES_REQ_MC:
185 frescan_manager_req_mc(req_data);
187 case FRESCAN_BWRES_REQ_RES:
188 case FRESCAN_BWRES_REQ_RES_GET:
189 case FRESCAN_BWRES_REP_RES_GET:
190 case FRESCAN_BWRES_REQ_RES_SET:
191 case FRESCAN_BWRES_REQ_RES_COMMIT:
192 case FRESCAN_BWRES_REQ_RES_CANCEL:
194 FRESCAN_ERROR("request type not supported\n");
198 if(req_data->request_node != frescan_data[net].local_node) {
199 ret = frescan_bwres_requests_free(req);
206 * frescan_acceptor_thread()
209 static void *frescan_acceptor_thread(void *arg)
212 frescan_bwres_request_id_t req;
213 frescan_network_t net = (uint32_t)arg;
215 DEBUG(FRESCAN_BWRES_ACCEPTOR_ENABLE_DEBUG, "acceptor thread starts\n");
218 ret = frescan_messages_recv_request(net, &req);
221 ret = frescan_bwres_requests_enqueue(req);
229 * frescan_manager_req_gn
232 static void frescan_manager_req_gn(frescan_bwres_request_data_t *req_data)
237 frescan_bwres_sa_scenario_t *scenario;
239 frescan_server_params_t server_params;
240 frescan_bwres_vres_t *vres;
242 me = frescan_data[req_data->net].local_node;
244 if (me != FRESCAN_BWRES_MASTER_NODE) {
245 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG,
246 "send gn req to master\n");
247 ret = frescan_messages_send_request(req_data);
252 scenario = &frescan_data[req_data->net].scenario;
254 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG, "prepare new scenario\n");
255 frescan_manager_gn_prepare_scenario(scenario, req_data);
257 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG, "perform sched analysis\n");
258 ret = frescan_bwres_sa_sched_test(scenario, &accepted);
262 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG, "ACCEPTED!\n");
263 req_data->return_value = FRESCAN_BWRES_REQ_ACCEPTED;
265 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG,
266 "spare capacity and mode change\n");
268 ret = frescan_bwres_sa_spare_capacity(scenario);
271 ret = frescan_bwres_mode_change_protocol(req_data);
274 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG, "FAILED!\n");
275 req_data->return_value = FRESCAN_BWRES_REQ_NOT_ACCEPTED;
276 frescan_manager_gn_restore_scenario(scenario, req_data);
279 if (req_data->request_node != me) {
280 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG, "send reply\n");
281 req_data->type = FRESCAN_BWRES_REP_GN;
283 ret = frescan_messages_send_request(req_data);
288 if (req_data->return_value == FRESCAN_BWRES_REQ_ACCEPTED) {
289 // create servers for new contracts
290 req_data->ss_new->size = req_data->contracts_to_neg->size;
291 for(i=0; i<req_data->ss_new->size; i++) {
292 vres = &frescan_data[req_data->net].scenario.
294 [req_data->ss_new->ss[i]];
296 server_params.budget = frsh_rel_time_to_usec(
297 frsh_sa_time_to_rel_time(vres->old_c)) /
298 FRESCAN_FRAME_TX_TIME_US;
300 server_params.period = frsh_sa_time_to_rel_time
302 server_params.prio = vres->old_p;
305 ret = frescan_servers_create(req_data->net,
309 assert (req_data->ss_new->ss[i] == ss);
313 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG, "signal robj\n");
314 ret = frescan_bwres_robjs_signal(req_data->robj);
319 * frescan_manager_gn_prepare_scenario
322 static void frescan_manager_gn_prepare_scenario
323 (frescan_bwres_sa_scenario_t *scenario,
324 frescan_bwres_request_data_t *req_data)
329 for(i=0; i<req_data->contracts_to_neg->size; i++) {
330 ret = freelist_alloc(&frescan_data[req_data->net].scenario.
331 ss_id_freelist[req_data->request_node]);
334 req_data->ss_new->ss[i] = (frescan_ss_t)ret;
336 ret = frescan_bwres_sa_add_contract
338 req_data->ss_new->ss[i],
339 req_data->request_node,
340 &req_data->contracts_to_neg->contracts[i]);
344 req_data->ss_new->size = req_data->contracts_to_neg->size;
347 scenario->backup_contracts_to_reneg.size =
348 req_data->contracts_to_reneg->size;
350 for(i=0; i<req_data->contracts_to_reneg->size; i++) {
351 ret = frescan_bwres_sa_update_contract
353 req_data->ss_to_reneg->ss[i],
354 req_data->request_node,
355 &req_data->contracts_to_reneg->contracts[i],
356 &scenario->backup_contracts_to_reneg.contracts[i]);
361 scenario->backup_contracts_to_cancel.size =
362 req_data->ss_to_cancel->size;
364 for(i=0; i<req_data->ss_to_cancel->size; i++) {
365 ret = frescan_bwres_sa_remove_contract
367 req_data->ss_to_cancel->ss[i],
368 req_data->request_node,
369 &scenario->backup_contracts_to_cancel.contracts[i]);
375 * frescan_manager_gn_restore_scenario
378 static void frescan_manager_gn_restore_scenario
379 (frescan_bwres_sa_scenario_t *scenario,
380 frescan_bwres_request_data_t *req_data)
385 for(i=0; i<req_data->contracts_to_neg->size; i++) {
386 ret = frescan_bwres_sa_remove_contract
388 req_data->ss_new->ss[i],
389 req_data->request_node,
393 ret = freelist_free(&frescan_data[req_data->net].scenario.
394 ss_id_freelist[req_data->request_node],
395 req_data->ss_new->ss[i]);
400 for(i=0; i<req_data->contracts_to_reneg->size; i++) {
401 ret = frescan_bwres_sa_update_contract
403 req_data->ss_to_reneg->ss[i],
404 req_data->request_node,
405 &scenario->backup_contracts_to_reneg.contracts[i],
411 for(i=0; i<req_data->ss_to_cancel->size; i++) {
412 ret = frescan_bwres_sa_add_contract
414 req_data->ss_to_cancel->ss[i],
415 req_data->request_node,
416 &scenario->backup_contracts_to_cancel.contracts[i]);
422 * frescan_manager_rep_gn
425 static void frescan_manager_rep_gn(frescan_bwres_request_data_t *req_data)
428 frescan_bwres_request_data_t *caller_req;
430 ret = frescan_bwres_requests_get_data(req_data->req, &caller_req);
433 caller_req->return_value = req_data->return_value;
435 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG,
436 "ret:%d -> %s\n", req_data->return_value,
437 (req_data->return_value ==
438 FRESCAN_BWRES_REQ_ACCEPTED) ? "OK" : "FAIL");
440 if (req_data->return_value == FRESCAN_BWRES_REQ_ACCEPTED) {
441 assert (req_data->ss_new->size ==
442 caller_req->contracts_to_neg->size);
443 caller_req->ss_new->size = req_data->ss_new->size;
445 DEBUG(FRESCAN_BWRES_MANAGER_ENABLE_DEBUG,
446 "ss_new->size:%u\n", caller_req->ss_new->size);
448 for (i=0; i<caller_req->ss_new->size; i++) {
449 caller_req->ss_new->ss[i] = req_data->ss_new->ss[i];
453 ret = frescan_bwres_robjs_signal(caller_req->robj);
458 * frescan_manager_req_mc
461 static void frescan_manager_req_mc(frescan_bwres_request_data_t *req_data)
465 ret = frescan_bwres_mode_change_local(req_data->net,
466 req_data->mode_change_type,
467 req_data->ss_to_cancel);