It doesn't make sense to create a clustered raid
with only 1 node.
Reported-by: Zhilong Liu <zlliu@xxxxxxxx>
Signed-off-by: Guoqing Jiang <gqjiang@xxxxxxxx>
---
Create.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/Create.c b/Create.c
index 1e4a6ee..717086b 100644
--- a/Create.c
+++ b/Create.c
@@ -114,8 +114,13 @@ int Create(struct supertype *st, char *mddev,
unsigned long long newsize;
int major_num = BITMAP_MAJOR_HI;
- if (s->bitmap_file && strcmp(s->bitmap_file, "clustered") == 0)
+ if (s->bitmap_file && strcmp(s->bitmap_file, "clustered") == 0) {
major_num = BITMAP_MAJOR_CLUSTERED;
+ if (c->nodes <= 1) {
+ pr_err("At least 2 nodes are needed for cluster-md\n");
+ return 1;
+ }
+ }
memset(&info, 0, sizeof(info));
if (s->level == UnSet && st && st->ss->default_geometry)
--
2.6.2
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