It doesn't make sense to write_bitmap with less than 2 nodes,
in order to avoid 'write_bitmap' received invalid nodes number,
it would be better to do checking nodes in getopt operations.
Signed-off-by: Zhilong Liu <zlliu@xxxxxxxx>
---
such as following method would reproduce the issue.
# mdadm -CR /dev/md0 -l1 -n2 --bitmap=internal /dev/sda /dev/sdb
# mdadm --grow /dev/md0 --bitmap=none
# mdadm --grow /dev/md0 --bitmap=clustered --nodes=1
# mdadm -X /dev/sda, it would be written internal bitmap.
diff --git a/mdadm.c b/mdadm.c
index b5d89e4..747101c 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -603,8 +603,8 @@ int main(int argc, char *argv[])
case O(GROW, Nodes):
case O(CREATE, Nodes):
c.nodes = parse_num(optarg);
- if (c.nodes <= 0) {
- pr_err("invalid number for the number of cluster nodes: %s\n",
+ if (c.nodes < 2) {
+ pr_err("clustered array needs two nodes at least: %s\n",
optarg);
exit(2);
}
diff --git a/super1.c b/super1.c
index 87a74cb..882cd61 100644
--- a/super1.c
+++ b/super1.c
@@ -2380,14 +2380,7 @@ static int write_bitmap1(struct supertype *st, int fd, enum bitmap_update update
}
if (bms->version == BITMAP_MAJOR_CLUSTERED) {
- if (st->nodes == 1) {
- /* the parameter for nodes is not valid */
- pr_err("Warning: cluster-md at least needs two nodes\n");
- return -EINVAL;
- } else if (st->nodes == 0)
- /* --nodes is not specified */
- break;
- else if (__cpu_to_le32(st->nodes) < bms->nodes) {
+ if (__cpu_to_le32(st->nodes) < bms->nodes) {
/* Since the nodes num is not increased, no need to check the space
* is enough or not, just update bms->nodes */
bms->nodes = __cpu_to_le32(st->nodes);
--
2.6.6
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