xfs_admin: get/set label of mounted filesystem

Adapt this tool to call xfs_io to get/set the label of a mounted filesystem.

Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
diff --git a/db/xfs_admin.sh b/db/xfs_admin.sh
index 3a7f44e..cc650c4 100755
--- a/db/xfs_admin.sh
+++ b/db/xfs_admin.sh
@@ -29,9 +29,11 @@
 	j)	DB_OPTS=$DB_OPTS" -c 'version log2'"
 		require_offline=1
 		;;
-	l)	DB_OPTS=$DB_OPTS" -r -c label";;
+	l)	DB_OPTS=$DB_OPTS" -r -c label"
+		IO_OPTS=$IO_OPTS" -r -c label"
+		;;
 	L)	DB_OPTS=$DB_OPTS" -c 'label "$OPTARG"'"
-		require_offline=1
+		IO_OPTS=$IO_OPTS" -c 'label -s "$OPTARG"'"
 		;;
 	O)	REPAIR_OPTS=$REPAIR_OPTS" -c $OPTARG"
 		require_offline=1