From f7ff6d3297c604e54639fe33d37069c06fe0be92 Mon Sep 17 00:00:00 2001
From: Julio Montes <julio.montes@intel.com>
Date: Tue, 25 Aug 2020 12:19:51 -0500
Subject: [PATCH] image-builder: disable reflink

Disable reflink when using DAX. Reflink is a xfs feature that cannot be
used together with DAX.

fixes kata-containers/osbuilder#456
fixes #577

Signed-off-by: Julio Montes <julio.montes@intel.com>
---
 tools/osbuilder/image-builder/image_builder.sh | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/osbuilder/image-builder/image_builder.sh b/tools/osbuilder/image-builder/image_builder.sh
index 54f4c007d2..6fd8c3ef55 100755
--- a/tools/osbuilder/image-builder/image_builder.sh
+++ b/tools/osbuilder/image-builder/image_builder.sh
@@ -324,7 +324,12 @@ format_loop() {
 			;;
 
 		"${xfs_format}")
-			mkfs.xfs -q -f -b size="${block_size}" "${device}p1"
+			# DAX and reflink cannot be used together!
+			# Explicitly disable reflink, if it fails then reflink
+			# is not supported and '-m reflink=0' is not needed.
+			if mkfs.xfs -m reflink=0 -q -f -b size="${block_size}" "${device}p1" 2>&1 | grep -q "unknown option"; then
+				mkfs.xfs -q -f -b size="${block_size}" "${device}p1"
+			fi
 			;;
 
 		*)