From 9d5deffb13d03a223a1b8709f023e98dec3f9b37 Mon Sep 17 00:00:00 2001
From: Rusty Bird <rustybird@net-c.com>
Date: Tue, 3 Dec 2019 18:21:51 +0000
Subject: [PATCH] storage/reflink: open in binary mode for loopdev resize ioctl

The default (= text) mode for a loop device which contains a VM image
looked weird, even though it didn't make a difference here because the
dev_io object was never actually read from.
---
 qubes/storage/reflink.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qubes/storage/reflink.py b/qubes/storage/reflink.py
index edf36ec3..1252fc69 100644
--- a/qubes/storage/reflink.py
+++ b/qubes/storage/reflink.py
@@ -439,7 +439,7 @@ def _update_loopdev_sizes(img):
                     continue
         except FileNotFoundError:
             continue
-        with open('/dev/' + sys_path.split('/')[3]) as dev_io:
+        with open('/dev/' + sys_path.split('/')[3], 'rb') as dev_io:
             fcntl.ioctl(dev_io.fileno(), LOOP_SET_CAPACITY)
 
 def _attempt_ficlone(src, dst):