The value of sb->max_dev will always be increased by 1 when adding
a new disk in linear array. It causes an inconsistence between each
disk in the array and the "Array State" value of "mdadm --examine DISK"
is wrong. For example, when adding the first new disk into linear array
it will be:
Array State : RAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
('A' == active, '.' == missing, 'R' == replacing)
Adding the second disk into linear array it will be
Array State : .AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
('A' == active, '.' == missing, 'R' == replacing)
Signed-off-by: Lidong Zhong <lzhong@xxxxxxxx>
---
super1.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/super1.c b/super1.c
index 2fcb814..86ec850 100644
--- a/super1.c
+++ b/super1.c
@@ -1267,8 +1267,9 @@ static int update_super1(struct supertype *st, struct mdinfo *info,
break;
sb->dev_number = __cpu_to_le32(i);
info->disk.number = i;
- if (max >= __le32_to_cpu(sb->max_dev))
+ if (i >= max) {
sb->max_dev = __cpu_to_le32(max+1);
+ }
random_uuid(sb->device_uuid);
@@ -1293,7 +1294,11 @@ static int update_super1(struct supertype *st, struct mdinfo *info,
}
}
} else if (strcmp(update, "linear-grow-update") == 0) {
+ int max = __le32_to_cpu(sb->max_dev);
sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
+ if (info->array.raid_disks > max) {
+ sb->max_dev = __cpu_to_le32(max+1);
+ }
sb->dev_roles[info->disk.number] =
__cpu_to_le16(info->disk.raid_disk);
} else if (strcmp(update, "resync") == 0) {
--
2.12.0
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