We at least need two nodes for cluster raid so make the
check before update node nums.
Reported-by: Zhilong Liu <zlliu@xxxxxxxx>
Signed-off-by: Guoqing Jiang <gqjiang@xxxxxxxx>
---
super1.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/super1.c b/super1.c
index 8d5543f..972b470 100644
--- a/super1.c
+++ b/super1.c
@@ -2394,6 +2394,11 @@ static int write_bitmap1(struct supertype *st, int fd, enum bitmap_update update
return -EINVAL;
}
+ if (bms->version == BITMAP_MAJOR_CLUSTERED && st->nodes <= 1) {
+ pr_err("Warning: cluster-md at least needs two nodes\n");
+ return -EINVAL;
+ }
+
/* Each node has an independent bitmap, it is necessary to calculate the
* space is enough or not, first get how many bytes for the total bitmap */
bm_space_per_node = calc_bitmap_size(bms, 4096);
--
2.6.2
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