From 0833f9c3dbaaee202b92ea956f9e2decc7b9593a Mon Sep 17 00:00:00 2001
From: Gioh Kim <gi-oh.kim@profitbricks.com>
Date: Tue, 6 Nov 2018 15:27:42 +0100
Subject: [PATCH] Assemble: keep MD_DISK_FAILFAST and MD_DISK_WRITEMOSTLY flag
Git-commit: 0833f9c3dbaaee202b92ea956f9e2decc7b9593a
Patch-mainline: mdadm-4.1+
References: jsc#SLE-10078, jsc#SLE-9348

Before updating superblock of slave disks, desired_state value
is set for the target state of the slave disks. But it forgets
to check MD_DISK_FAILFAST and MD_DISK_WRITEMOSTLY flags. Then
start_arrays() calls ADD_NEW_DISK ioctl-call and pass the state
without MD_DISK_FAILFAST and MD_DISK_WRITEMOSTLY.

Currenlty it does not generate any problem because kernel does not
care MD_DISK_FAILFAST or MD_DISK_WRITEMOSTLY flags.

Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Gioh Kim <gi-oh.kim@profitbricks.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
Signed-off-by: Coly Li <colyli@suse.de>

---
 Assemble.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Assemble.c b/Assemble.c
index a79466c..f39c9e1 100644
--- a/Assemble.c
+++ b/Assemble.c
@@ -1704,6 +1704,9 @@ try_again:
 		else
 			desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
 
+		desired_state |= devices[j].i.disk.state & ((1<<MD_DISK_FAILFAST) |
+							    (1<<MD_DISK_WRITEMOSTLY));
+
 		if (!devices[j].uptodate)
 			continue;
 
-- 
2.25.0