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a697028)
As "mount.nfs" can start statd, and as statd can start sm-notify,
the risk of sm-notify being run multiple times increases.
As this is not normally appropriate, sm-notify now creates a
file in /var/run which will stop future instances from being
run (though ofcourse this behaviour can be controlled by a
new command line option).
.SH NAME
sm-notify \- Send out NSM reboot notifications
.SH SYNOPSIS
.SH NAME
sm-notify \- Send out NSM reboot notifications
.SH SYNOPSIS
-.BI "/sbin/sm-notify [-d] [-q] [-m " time "] [-p " port "] [-P " path "] [-v " my_name " ]
+.BI "/sbin/sm-notify [-dfq] [-m " time "] [-p " port "] [-P " path "] [-v " my_name " ]
.SH DESCRIPTION
File locking over NFS (v2 and v3) requires a facility to notify peers in
case of a reboot, so that clients can reclaim locks after
.SH DESCRIPTION
File locking over NFS (v2 and v3) requires a facility to notify peers in
case of a reboot, so that clients can reclaim locks after
.B state
must exist in that directory with the standard names.
.TP
.B state
must exist in that directory with the standard names.
.TP
+.B -f
+If the state path has not been reset with
+.BR -P ,
+.B sm-notify
+will normally create a file in
+.B /var/run
+to indicate that it has been
+run. If this file is found when
+.B sm-notify
+starts, it will not run again (as it is normally only needed once per
+reboot).
+If
+.B -f
+(for
+.BR force )
+is given,
+.B sm-notify
+will run even if the file in
+.B /var/run
+is present.
+.TP
-Do not update the NSM state. This is for testing only.
+Do not update the NSM state. This is for testing only. Setting this
+flag implies
+.BR -f .
.TP
.B -d
Enables debugging.
.TP
.B -d
Enables debugging.
.BR /var/lib/nfs/sm/*
.br
.BR /var/lib/nfs/sm.bak/*
.BR /var/lib/nfs/sm/*
.br
.BR /var/lib/nfs/sm.bak/*
+.br
+.BR /var/run/sm-notify.pid
.SH SEE ALSO
.BR rpc.nfsd(8),
.BR portmap(8)
.SH SEE ALSO
.BR rpc.nfsd(8),
.BR portmap(8)
static void addr_set_port(nsm_address *, int);
static int host_lookup(int, const char *, nsm_address *);
void nsm_log(int fac, const char *fmt, ...);
static void addr_set_port(nsm_address *, int);
static int host_lookup(int, const char *, nsm_address *);
void nsm_log(int fac, const char *fmt, ...);
+static int record_pid();
static struct nsm_host * hosts = NULL;
static struct nsm_host * hosts = NULL;
main(int argc, char **argv)
{
int c;
main(int argc, char **argv)
{
int c;
- while ((c = getopt(argc, argv, "dm:np:v:qP:")) != -1) {
+ while ((c = getopt(argc, argv, "dm:np:v:qP:f")) != -1) {
+ case 'f':
+ force = 1;
+ break;
case 'd':
opt_debug++;
break;
case 'd':
opt_debug++;
break;
-usage: fprintf(stderr, "sm-notify [-d]\n");
+usage: fprintf(stderr,
+ "Usage: sm-notify [-dfq] [-m max-retry-minutes] [-p srcport]\n"
+ " [-P /path/to/state/directory] [-N my_host_name\n");
+ if (strcmp(_SM_BASE_PATH, BASEDIR) == 0) {
+ if (record_pid() == 0 && force == 0 && opt_update_state == 0)
+ /* already run, don't try again */
+ exit(0);
+ }
+
if (opt_srcaddr) {
strncpy(nsm_hostname, opt_srcaddr, sizeof(nsm_hostname)-1);
} else
if (opt_srcaddr) {
strncpy(nsm_hostname, opt_srcaddr, sizeof(nsm_hostname)-1);
} else
+
+/*
+ * Record pid in /var/run/sm-notify.pid
+ * This file should remain until a reboot, even if the
+ * program exits.
+ * If file already exists, fail.
+ */
+static int record_pid()
+{
+ char pid[20];
+ int fd;
+
+ snprintf(pid, 20, "%d\n", getpid());
+ fd = open("/var/run/sm-notify.pid", O_CREAT|O_EXCL|O_WRONLY, 0600);
+ if (!fd)
+ return 0;
+ write(fd, pid, strlen(pid));
+ close(fd);
+ return 1;
+}