From 32c4626c4c34a7deb9ddc5edfba98c3f171900c8 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 22 Sep 2020 11:21:27 +0200
Subject: [PATCH] shutdown: also fsync() MD devices when going down

Let's make this explicit, just in case this suffers by the same issues
as the loopback devices, and drops in-flight IO when we disassemble it.
---
 src/shutdown/umount.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/shutdown/umount.c b/src/shutdown/umount.c
index 43544857283..89b05fcc3fb 100644
--- a/src/shutdown/umount.c
+++ b/src/shutdown/umount.c
@@ -484,6 +484,9 @@ static int delete_md(MountPoint *m) {
         if (fd < 0)
                 return -errno;
 
+        if (fsync(fd) < 0)
+                log_debug_errno(errno, "Failed to sync MD block device %s, ignoring: %m", m->path);
+
         if (ioctl(fd, STOP_ARRAY, NULL) < 0)
                 return -errno;
 
-- 
2.47.3