From 55ce21003ee0fb12fe5ef70909cdc8ce00b803e4 Mon Sep 17 00:00:00 2001
From: neilbrown <neilbrown>
Date: Mon, 2 Sep 2002 02:31:12 +0000
Subject: [PATCH] -N for statd

---
 ChangeLog             | 10 ++++++++++
 utils/statd/statd.c   | 20 +++++++++++++-------
 utils/statd/statd.h   |  2 +-
 utils/statd/statd.man |  6 ++++++
 4 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 363141c..856dba4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2002-09-02 Juan Gomez <juang@us.ibm.com>
+	NeilBrown <neilb@cse.unsw.edu.au>
+
+	Add -N option to statd to run in notify-only mode.
+
+	* utils/statd/statd.h: uncomment MODE_NOTIFY_ONLY
+	* utils/statd/statd.man: document -N
+	* utils/statd/statd.c: enabled -N, largely exists but needed to be
+	uncommented and completed
+	
 2002-09-02 Juan Gomez <juang@us.ibm.com>
 	NeilBrown <neilb@cse.unsw.edu.au>
 
diff --git a/utils/statd/statd.c b/utils/statd/statd.c
index 3a6ed61..b1e7304 100644
--- a/utils/statd/statd.c
+++ b/utils/statd/statd.c
@@ -55,6 +55,7 @@ static struct option longopts[] =
 	{ "port", 1, 0, 'p' },
 	{ "name", 1, 0, 'n' },
 	{ "state-directory-path", 1, 0, 'P' },
+	{ "notify-mode", 0, 0, 'N' },
 	{ NULL, 0, 0, 0 }
 };
 
@@ -112,11 +113,11 @@ static void log_modes(void)
 		strcat(buf,"No-Daemon ");
 	if (run_mode & MODE_LOG_STDERR)
 		strcat(buf,"Log-STDERR ");
-	/* future: IP aliasing
+
 	if (run_mode & MODE_NOTIFY_ONLY)
 	{
 		strcat(buf,"Notify-Only ");
-	} */
+	}
 	log(L_WARNING,buf);
 	/* future: IP aliasing
 	if (run_mode & MODE_NOTIFY_ONLY)
@@ -141,6 +142,7 @@ usage()
 	fprintf(stderr,"      -V, -v, --version    Display version information and exit.\n");
 	fprintf(stderr,"      -n, --name           Specify a local hostname.\n");
 	fprintf(stderr,"      -P                   State directory path.\n");
+	fprintf(stderr,"      -N                   Run in notify only mode.\n");
 }
 
 /* 
@@ -174,7 +176,7 @@ int main (int argc, char **argv)
 	MY_NAME = NULL;
 
 	/* Process command line switches */
-	while ((arg = getopt_long(argc, argv, "h?vVFdn:p:o:P:", longopts, NULL)) != EOF) {
+	while ((arg = getopt_long(argc, argv, "h?vVFNdn:p:o:P:", longopts, NULL)) != EOF) {
 		switch (arg) {
 		case 'V':	/* Version */
 		case 'v':
@@ -183,6 +185,9 @@ int main (int argc, char **argv)
 		case 'F':	/* Foreground/nodaemon mode */
 			run_mode |= MODE_NODAEMON;
 			break;
+		case 'N':
+			run_mode |= MODE_NOTIFY_ONLY;
+			break;
 		case 'd':	/* No daemon only - log to stderr */
 			run_mode |= MODE_LOG_STDERR;
 			break;
@@ -308,18 +313,19 @@ int main (int argc, char **argv)
 		notify_hosts ();	/* Send out notify requests */
 		++restart;
 
-		/* future: IP aliasing 
+		/* this registers both UDP and TCP services */
 		if (!(run_mode & MODE_NOTIFY_ONLY)) {
 			rpc_init("statd", SM_PROG, SM_VERS, sm_prog_1, port);
-		} */
-		/* this registers both UDP and TCP services */
-		rpc_init("statd", SM_PROG, SM_VERS, sm_prog_1, port);
+		} 
 
 		/*
 		 * Handle incoming requests:  SM_NOTIFY socket requests, as
 		 * well as callbacks from lockd.
 		 */
 		my_svc_run();	/* I rolled my own, Olaf made it better... */
+
+		if ((run_mode & MODE_NOTIFY_ONLY))
+			break;			
 	}
 	return 0;
 }
diff --git a/utils/statd/statd.h b/utils/statd/statd.h
index 5e2b6fd..ef90bdd 100644
--- a/utils/statd/statd.h
+++ b/utils/statd/statd.h
@@ -73,7 +73,7 @@ stat_chge		SM_stat_chge;
 extern int run_mode;
 #define MODE_NODAEMON 1		/* No-daemon/foreground mode. */
 #define MODE_LOG_STDERR 2	/* in foreground mode, log to stderr */
-/*#define MODE_NOTIFY_ONLY 4*/	/* Send SM_NOTIFY to everyone monitored on
+#define MODE_NOTIFY_ONLY 4	/* Send SM_NOTIFY to everyone monitored on
 				   a single interface/alias */
 /* LH - notify_only mode would be for notifying hosts on an IP alias
  * that just came back up, for ex, when failing over a HA service to
diff --git a/utils/statd/statd.man b/utils/statd/statd.man
index 2b10803..6a683ff 100644
--- a/utils/statd/statd.man
+++ b/utils/statd/statd.man
@@ -95,6 +95,12 @@ If this option is not specified the default of
 .BR /var/lib/nfs
 is used.
 .TP
+.B -N
+Causes statd to run in the notify-only mode. When started in this mode, the
+statd program will check its state directory, send notifications to any
+monitored nodes, and exit once the notifications have been sent. This mode is
+used to enable Highly Available NFS implementations (i.e. HA-NFS).
+.TP
 .B -?
 Causes
 .B rpc.statd
-- 
2.39.5