Improve error message for adding bitmap to a level that cannot support it.

Also give error on --build if no devices given.

1 files changed, 6 insertions, 0 deletions

diff --git a/Build.c b/Build.c
index df9f4f2f..1de35966 100644
--- a/Build.c
+++ b/Build.c
@@ -146,6 +146,12 @@ int Build(char *mddev, int mdfd, int chunk, int level, int layout,
 		fprintf(stderr, Name ": bitmaps not supported with this kernel\n");
 		return 1;
 	}
+
+	if (bitmap_file && level <= 0) {
+		fprintf(stderr, Name ": bitmaps not meaningful with level %s\n",
+			map_num(pers, level)?:"given");
+		return 1;
+	}
 	/* now add the devices */
 	for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) {
 		unsigned long long dsize;