2 * Bacula File Daemon heartbeat routines
3 * Listens for heartbeats coming from the SD
4 * If configured, sends heartbeats to Dir
6 * Kern Sibbald, May MMIII
12 Copyright (C) 2000-2003 Kern Sibbald and John Walker
14 This program is free software; you can redistribute it and/or
15 modify it under the terms of the GNU General Public License as
16 published by the Free Software Foundation; either version 2 of
17 the License, or (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 General Public License for more details.
24 You should have received a copy of the GNU General Public
25 License along with this program; if not, write to the Free
26 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
35 /* pthread_kill() dies on Cygwin, so disable it */
36 #define pthread_kill(x, y)
37 /* Use shorter wait interval on Cygwin because no kill */
38 #define WAIT_INTERVAL 10
40 #else /* Unix systems */
41 #define WAIT_INTERVAL 60
45 * Listen on the SD socket for heartbeat signals.
46 * Send heartbeats to the Director every HB_TIME
49 static void *sd_heartbeat_thread(void *arg)
52 JCR *jcr = (JCR *)arg;
54 time_t last_heartbeat = time(NULL);
57 pthread_detach(pthread_self());
59 /* Get our own local copy */
60 sd = dup_bsock(jcr->store_bsock);
61 dir = dup_bsock(jcr->dir_bsock);
65 /* Hang reading the socket to the SD, and every time we get
66 * a heartbeat, we simply send it on to the Director to
69 for ( ; !is_bnet_stop(sd); ) {
70 n = bnet_wait_data_intr(sd, WAIT_INTERVAL);
71 if (me->heartbeat_interval) {
73 if (now-last_heartbeat >= me->heartbeat_interval) {
74 bnet_sig(dir, BNET_HEARTBEAT);
78 if (n == 1) { /* input waiting */
79 bnet_recv(sd); /* read it -- probably heartbeat from sd */
80 Dmsg1(100, "Got %d from SD\n", sd->msglen);
89 /* Startup the heartbeat thread -- see above */
90 void start_heartbeat_monitor(JCR *jcr)
93 pthread_create(&jcr->heartbeat_id, NULL, sd_heartbeat_thread, (void *)jcr);
96 /* Terminate the heartbeat thread. Used for both SD and DIR */
97 void stop_heartbeat_monitor(JCR *jcr)
99 /* Wait for heartbeat thread to start */
100 while (jcr->hb_bsock == NULL) {
101 bmicrosleep(0, 50); /* avoid race */
103 jcr->hb_bsock->timed_out = 1; /* set timed_out to terminate read */
104 jcr->hb_bsock->terminated = 1; /* set to terminate read */
106 /* Wait for heartbeat thread to stop */
107 while (jcr->hb_bsock) {
108 /* Naturally, Cygwin 1.3.20 craps out on the following */
109 pthread_kill(jcr->heartbeat_id, TIMEOUT_SIGNAL); /* make heartbeat thread go away */
115 * Thread for sending heartbeats to the Director when there
116 * is no SD monitoring needed -- e.g. restore and verify Vol
117 * both do their own read() on the SD socket.
119 static void *dir_heartbeat_thread(void *arg)
121 JCR *jcr = (JCR *)arg;
123 time_t last_heartbeat = time(NULL);
125 pthread_detach(pthread_self());
127 /* Get our own local copy */
128 dir = dup_bsock(jcr->dir_bsock);
132 for ( ; !is_bnet_stop(dir); ) {
136 next = now - last_heartbeat;
137 if (next >= me->heartbeat_interval) {
138 bnet_sig(dir, BNET_HEARTBEAT);
139 last_heartbeat = now;
141 bmicrosleep(next, 0);
144 jcr->hb_bsock = NULL;
148 * Same as above but we don't listen to the SD
150 void start_dir_heartbeat(JCR *jcr)
152 if (me->heartbeat_interval) {
153 pthread_create(&jcr->heartbeat_id, NULL, dir_heartbeat_thread, (void *)jcr);
157 void stop_dir_heartbeat(JCR *jcr)
159 if (me->heartbeat_interval) {
160 stop_heartbeat_monitor(jcr);