From d07e561810a2e33b667a8a9476edaff42eb119b9 Mon Sep 17 00:00:00 2001
From: Heming Zhao <heming.zhao@suse.com>
Date: Thu, 23 Feb 2023 22:39:39 +0800
Subject: [PATCH 085/125] Grow: fix can't change bitmap type from none to
 clustered.

Commit a042210648ed ("disallow create or grow clustered bitmap with
writemostly set") introduced this bug. We should use 'true' logic not
'== 0' to deny setting up clustered array under WRITEMOSTLY condition.

How to trigger

```
~/mdadm # ./mdadm -Ss && ./mdadm --zero-superblock /dev/sd{a,b}
~/mdadm # ./mdadm -C /dev/md0 -l mirror -b clustered -e 1.2 -n 2 \
/dev/sda /dev/sdb --assume-clean
mdadm: array /dev/md0 started.
~/mdadm # ./mdadm --grow /dev/md0 --bitmap=none
~/mdadm # ./mdadm --grow /dev/md0 --bitmap=clustered
mdadm: /dev/md0 disks marked write-mostly are not supported with clustered bitmap
```

Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Acked-by: Coly Li <colyli@suse.de>
Signed-off-by: Jes Sorensen <jes@trained-monkey.org>
---
 Grow.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Grow.c b/Grow.c
index 8f5cf07d..bb5fe45c 100644
--- a/Grow.c
+++ b/Grow.c
@@ -429,7 +429,7 @@ int Grow_addbitmap(char *devname, int fd, struct context *c, struct shape *s)
 			dv = map_dev(disk.major, disk.minor, 1);
 			if (!dv)
 				continue;
-			if (((disk.state & (1 << MD_DISK_WRITEMOSTLY)) == 0) &&
+			if ((disk.state & (1 << MD_DISK_WRITEMOSTLY)) &&
 			   (strcmp(s->bitmap_file, "clustered") == 0)) {
 				pr_err("%s disks marked write-mostly are not supported with clustered bitmap\n",devname);
 				free(mdi);
-- 
2.38.1