check if user forgets to specify the --level
when build a new array. such as:
./mdadm -B /dev/md0 -n2 /dev/loop[0-1]
Signed-off-by: Zhilong Liu <zlliu@xxxxxxxx>
---
Build.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/Build.c b/Build.c
index 74a440e..a5fcc06 100644
--- a/Build.c
+++ b/Build.c
@@ -56,6 +56,10 @@ int Build(char *mddev, struct mddev_dev *devlist,
int uuid[4] = {0,0,0,0};
struct map_ent *map = NULL;
+ if (s->level == UnSet) {
+ pr_err("a RAID level is needed to Build an array.\n");
+ return 1;
+ }
/* scan all devices, make sure they really are block devices */
for (dv = devlist; dv; dv=dv->next) {
subdevs++;
--
2.10.2
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