From 567617ebbe717c1f371a630b14c83d8aa044c93f Mon Sep 17 00:00:00 2001
From: Marian Beermann <public@enkore.de>
Date: Fri, 8 Jul 2016 18:05:21 +0200
Subject: [PATCH] sync_dir: silence fsync() failing with EINVAL

---
 src/borg/platform/base.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/borg/platform/base.py b/src/borg/platform/base.py
index 51689db25..ef8853e31 100644
--- a/src/borg/platform/base.py
+++ b/src/borg/platform/base.py
@@ -1,3 +1,4 @@
+import errno
 import os
 
 """
@@ -52,6 +53,11 @@ def sync_dir(path):
     fd = os.open(path, os.O_RDONLY)
     try:
         os.fsync(fd)
+    except OSError as os_error:
+        # Some network filesystems don't support this and fail with EINVAL.
+        # Other error codes (e.g. EIO) shouldn't be silenced.
+        if os_error.errno != errno.EINVAL:
+            raise
     finally:
         os.close(fd)