diff -up nfs-utils-1.3.0/utils/blkmapd/blkmapd.man.save nfs-utils-1.3.0/utils/blkmapd/blkmapd.man
--- nfs-utils-1.3.0/utils/blkmapd/blkmapd.man.save	2014-03-25 11:12:07.000000000 -0400
+++ nfs-utils-1.3.0/utils/blkmapd/blkmapd.man	2016-05-17 14:12:08.000000000 -0400
@@ -9,7 +9,7 @@
 .SH NAME
 blkmapd \- pNFS block layout mapping daemon
 .SH SYNOPSIS
-.B "blkmapd [-d] [-f]"
+.B "blkmapd [-h] [-d] [-f]"
 .SH DESCRIPTION
 The
 .B blkmapd
@@ -33,6 +33,9 @@ reflect the server topology, and passes
 by the pNFS block layout client.
 .SH OPTIONS
 .TP
+.B -h
+Display usage message.
+.TP
 .B -d
 Performs device discovery only then exits.
 .TP
diff -up nfs-utils-1.3.0/utils/blkmapd/device-discovery.c.save nfs-utils-1.3.0/utils/blkmapd/device-discovery.c
--- nfs-utils-1.3.0/utils/blkmapd/device-discovery.c.save	2016-05-17 14:11:36.000000000 -0400
+++ nfs-utils-1.3.0/utils/blkmapd/device-discovery.c	2016-05-17 14:11:48.000000000 -0400
@@ -427,7 +427,10 @@ void sig_die(int signal)
 	BL_LOG_ERR("exit on signal(%d)\n", signal);
 	exit(1);
 }
-
+static void usage(void)
+{
+	fprintf(stderr, "Usage: blkmapd [-hdf]\n" );
+}
 /* Daemon */
 int main(int argc, char **argv)
 {
@@ -435,7 +438,7 @@ int main(int argc, char **argv)
 	struct stat statbuf;
 	char pidbuf[64];
 
-	while ((opt = getopt(argc, argv, "df")) != -1) {
+	while ((opt = getopt(argc, argv, "hdf")) != -1) {
 		switch (opt) {
 		case 'd':
 			dflag = 1;
@@ -443,6 +446,13 @@ int main(int argc, char **argv)
 		case 'f':
 			fg = 1;
 			break;
+		case 'h':
+			usage();
+			exit(0);
+		default:
+			usage();
+			exit(1);
+			
 		}
 	}