nfs-utils: mount: Stop v4 umounts from ping remote mountds

index 5894e3a..bb06341 100644
@@ -19,6 +19,7 @@
 
 #include <stdio.h>
 #include <errno.h>
+#include <unistd.h>
 #include <getopt.h>
 #include <mntent.h>
 #include <sys/mount.h>

@@ -333,7 +334,7 @@ void umount_usage()
 
 int nfsumount(int argc, char *argv[])
 {
-	int c, ret;
+	int c, ret, v4=0;
 	char *spec;
 	struct mntentchn *mc;
 

@@ -371,39 +372,33 @@ int nfsumount(int argc, char *argv[])
 	mc = getmntdirbackward(spec, NULL);
 	if (!mc)
 		mc = getmntdevbackward(spec, NULL);
-	if (!mc && verbose)
-		printf(_("Could not find %s in mtab\n"), spec);
-
-	if(mc) {
-		if(contains(mc->m.mnt_opts, "user") && getuid() != 0) {
-			struct passwd *pw = getpwuid(getuid());
-			if(!pw || strcmp(pw->pw_name, get_value(mc->m.mnt_opts, "user="))) {
-				fprintf(stderr, "%s: permission denied to unmount %s\n",
-						progname, spec);
-				exit(1);
-			}
-		} else {
-			if(!contains(mc->m.mnt_opts, "users") && getuid() != 0) {
-				fprintf(stderr, "%s: only root can unmount %s from %s\n",
-						progname, mc->m.mnt_fsname, mc->m.mnt_dir);
-				exit(1);
-			}
-		}
-
-		ret = 0;
-		if(!force && !lazy)
-			ret = _nfsumount(mc->m.mnt_fsname, mc->m.mnt_opts);
-		if(!ret)
-			ret = add_mtab2(mc->m.mnt_fsname, mc->m.mnt_dir,
-				mc->m.mnt_type, mc->m.mnt_opts, mc);
+	if (mc == NULL) {
+		fprintf(stderr, "%s: Unable to find '%s' in mount table\n",
+				progname, spec);
+		exit(1);
 	}
-	else {
-		ret = 0;
-		if(!force && !lazy)
-			ret = _nfsumount(spec, NULL);
-		if(!ret)
-			ret = add_mtab2(spec, spec, spec, spec, NULL);
+	if(contains(mc->m.mnt_opts, "user") && getuid() != 0) {
+		struct passwd *pw = getpwuid(getuid());
+		if(!pw || strcmp(pw->pw_name, get_value(mc->m.mnt_opts, "user="))) {
+			fprintf(stderr, "%s: permission denied to unmount %s\n",
+					progname, spec);
+			exit(1);
+		}
+	} else {
+		if(!contains(mc->m.mnt_opts, "users") && getuid() != 0) {
+			fprintf(stderr, "%s: only root can unmount %s from %s\n",
+					progname, mc->m.mnt_fsname, mc->m.mnt_dir);
+			exit(1);
+		}
 	}
+	v4 = contains(mc->m.mnt_type, "nfs4");
+
+	ret = 0;
+	if(!force && !lazy && !v4)
+		ret = _nfsumount(mc->m.mnt_fsname, mc->m.mnt_opts);
+	if(!ret)
+		ret = add_mtab2(mc->m.mnt_fsname, mc->m.mnt_dir,
+			mc->m.mnt_type, mc->m.mnt_opts, mc);
 
 	return(ret);
 }