2 Bacula® - The Network Backup Solution
4 Copyright (C) 2003-2008 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version three of the GNU Affero General Public
10 License as published by the Free Software Foundation and included
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Affero General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of Kern Sibbald.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
29 * Bacula File Daemon heartbeat routines
30 * Listens for heartbeats coming from the SD
31 * If configured, sends heartbeats to Dir
33 * Kern Sibbald, May MMIII
42 #define WAIT_INTERVAL 5
44 extern "C" void *sd_heartbeat_thread(void *arg);
45 extern "C" void *dir_heartbeat_thread(void *arg);
46 extern bool no_signals;
49 * Listen on the SD socket for heartbeat signals.
50 * Send heartbeats to the Director every HB_TIME
53 extern "C" void *sd_heartbeat_thread(void *arg)
56 JCR *jcr = (JCR *)arg;
58 time_t last_heartbeat = time(NULL);
61 pthread_detach(pthread_self());
63 /* Get our own local copy */
64 sd = dup_bsock(jcr->store_bsock);
65 dir = dup_bsock(jcr->dir_bsock);
68 jcr->hb_started = true;
69 jcr->hb_dir_bsock = dir;
71 /* Hang reading the socket to the SD, and every time we get
72 * a heartbeat or we get a wait timeout (1 minute), we
73 * check to see if we need to send a heartbeat to the
76 for ( ; !is_bnet_stop(sd); ) {
77 n = bnet_wait_data_intr(sd, WAIT_INTERVAL);
78 if (me->heartbeat_interval) {
80 if (now-last_heartbeat >= me->heartbeat_interval) {
81 bnet_sig(dir, BNET_HEARTBEAT);
85 if (n < 0 || is_bnet_stop(sd)) {
88 if (n == 1) { /* input waiting */
89 sd->recv(); /* read it -- probably heartbeat from sd */
90 if (sd->msglen <= 0) {
91 Dmsg1(100, "Got BNET_SIG %d from SD\n", sd->msglen);
93 Dmsg2(100, "Got %d bytes from SD. MSG=%s\n", sd->msglen, sd->msg);
96 Dmsg2(100, "wait_intr=%d stop=%d\n", n, is_bnet_stop(sd));
100 jcr->hb_bsock = NULL;
101 jcr->hb_started = false;
102 jcr->hb_dir_bsock = NULL;
106 /* Startup the heartbeat thread -- see above */
107 void start_heartbeat_monitor(JCR *jcr)
110 * If no signals are set, do not start the heartbeat because
111 * it gives a constant stream of TIMEOUT_SIGNAL signals that
112 * make debugging impossible.
115 jcr->hb_bsock = NULL;
116 jcr->hb_started = false;
117 jcr->hb_dir_bsock = NULL;
118 pthread_create(&jcr->heartbeat_id, NULL, sd_heartbeat_thread, (void *)jcr);
122 /* Terminate the heartbeat thread. Used for both SD and DIR */
123 void stop_heartbeat_monitor(JCR *jcr)
129 /* Wait max 10 secs for heartbeat thread to start */
130 while (!jcr->hb_started && cnt++ < 200) {
131 bmicrosleep(0, 50000); /* wait for start */
134 if (jcr->hb_started) {
135 jcr->hb_bsock->set_timed_out(); /* set timed_out to terminate read */
136 jcr->hb_bsock->set_terminated(); /* set to terminate read */
138 if (jcr->hb_dir_bsock) {
139 jcr->hb_dir_bsock->set_timed_out(); /* set timed_out to terminate read */
140 jcr->hb_dir_bsock->set_terminated(); /* set to terminate read */
142 if (jcr->hb_started) {
143 Dmsg0(100, "Send kill to heartbeat id\n");
144 pthread_kill(jcr->heartbeat_id, TIMEOUT_SIGNAL); /* make heartbeat thread go away */
145 bmicrosleep(0, 50000);
148 /* Wait max 100 secs for heartbeat thread to stop */
149 while (jcr->hb_started && cnt++ < 200) {
150 pthread_kill(jcr->heartbeat_id, TIMEOUT_SIGNAL); /* make heartbeat thread go away */
151 bmicrosleep(0, 500000);
156 * Thread for sending heartbeats to the Director when there
157 * is no SD monitoring needed -- e.g. restore and verify Vol
158 * both do their own read() on the SD socket.
160 extern "C" void *dir_heartbeat_thread(void *arg)
162 JCR *jcr = (JCR *)arg;
164 time_t last_heartbeat = time(NULL);
166 pthread_detach(pthread_self());
168 /* Get our own local copy */
169 dir = dup_bsock(jcr->dir_bsock);
172 jcr->hb_started = true;
174 for ( ; !is_bnet_stop(dir); ) {
178 next = now - last_heartbeat;
179 if (next >= me->heartbeat_interval) {
180 dir->signal(BNET_HEARTBEAT);
181 last_heartbeat = now;
183 bmicrosleep(next, 0);
186 jcr->hb_bsock = NULL;
187 jcr->hb_started = false;
192 * Same as above but we don't listen to the SD
194 void start_dir_heartbeat(JCR *jcr)
196 if (me->heartbeat_interval) {
197 jcr->dir_bsock->set_locking();
198 pthread_create(&jcr->heartbeat_id, NULL, dir_heartbeat_thread, (void *)jcr);
202 void stop_dir_heartbeat(JCR *jcr)
204 if (me->heartbeat_interval) {
205 stop_heartbeat_monitor(jcr);