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From 68fee4af1703dc0bc0d1c9c99fd750e8dca3a131 Mon Sep 17 00:00:00 2001
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From: Lidong Zhong <lzhong@suse.com>
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Date: Thu, 25 May 2017 17:28:11 +0800
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Subject: [RHEL7.5 PATCH 148/169] super1: fix sb->max_dev when adding a new
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disk in linear array
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The value of sb->max_dev will always be increased by 1 when adding
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a new disk in linear array. It causes an inconsistence between each
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disk in the array and the "Array State" value of "mdadm --examine DISK"
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is wrong. For example, when adding the first new disk into linear array
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it will be:
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Array State : RAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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('A' == active, '.' == missing, 'R' == replacing)
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Adding the second disk into linear array it will be
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Array State : .AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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('A' == active, '.' == missing, 'R' == replacing)
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Signed-off-by: Lidong Zhong <lzhong@suse.com>
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Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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---
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super1.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/super1.c b/super1.c
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index 2fcb814..86ec850 100644
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--- a/super1.c
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+++ b/super1.c
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@@ -1267,8 +1267,9 @@ static int update_super1(struct supertype *st, struct mdinfo *info,
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break;
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sb->dev_number = __cpu_to_le32(i);
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info->disk.number = i;
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- if (max >= __le32_to_cpu(sb->max_dev))
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+ if (i >= max) {
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sb->max_dev = __cpu_to_le32(max+1);
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+ }
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random_uuid(sb->device_uuid);
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@@ -1293,7 +1294,11 @@ static int update_super1(struct supertype *st, struct mdinfo *info,
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}
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}
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} else if (strcmp(update, "linear-grow-update") == 0) {
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+ int max = __le32_to_cpu(sb->max_dev);
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sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
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+ if (info->array.raid_disks > max) {
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+ sb->max_dev = __cpu_to_le32(max+1);
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+ }
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sb->dev_roles[info->disk.number] =
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__cpu_to_le16(info->disk.raid_disk);
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} else if (strcmp(update, "resync") == 0) {
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--
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2.7.4
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