From 7022f85ca72f3b0fda02b903e2ef99c803e836f2 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Sat, 10 Nov 2018 12:51:44 +0100
Subject: [PATCH] xfs: xfs_fsr requires working preallocation support

Check that the file system actually supports preallocation for defrag
tests that end up calling xfs_fsr, as they can't be supported in
always_cow mode.

[Eryu: add comments in code as well]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
---
 common/defrag | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/common/defrag b/common/defrag
index df249dfd..2bd739c0 100644
--- a/common/defrag
+++ b/common/defrag
@@ -8,6 +8,8 @@ _require_defrag()
 {
     case "$FSTYP" in
     xfs)
+        # xfs_fsr does preallocates, require "falloc"
+        _require_xfs_io_command "falloc"
         DEFRAG_PROG="$XFS_FSR_PROG"
 	;;
     ext4|ext4dev)
-- 
2.39.5