From c31d317c6349ae6f2a54f4ce8cad80cc1517dcfc Mon Sep 17 00:00:00 2001
From: Rusty Bird <rustybird@net-c.com>
Date: Sun, 11 Mar 2018 15:34:55 +0000
Subject: [PATCH] storage/reflink: fsync() after resizing existing file

Ensure that the updated metadata is written to disk.
---
 qubes/storage/reflink.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/qubes/storage/reflink.py b/qubes/storage/reflink.py
index 7cb9ca10..cc3a5db1 100644
--- a/qubes/storage/reflink.py
+++ b/qubes/storage/reflink.py
@@ -378,6 +378,7 @@ def _resize_file(path, size):
     ''' Resize an existing file. '''
     with open(path, 'rb+') as file:
         file.truncate(size)
+        os.fsync(file.fileno())
 
 def _create_sparse_file(path, size):
     ''' Create an empty sparse file. '''