[LTP] [PATCH 2/2] df01.sh: Use tst_fsfreeze for XFS on kernel >= 5.19

[Petr Vorel]

XFS since kernel 5.19 postpone certain operation.  Use LTP fsfreeze
implementation to force all the background garbage collection to run
to completion.

Link: https://lore.kernel.org/linux-block/974cc110-d47e-5fae-af5f-e2e610720e2d@redhat.com/
Suggested-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
 testcases/commands/df/df01.sh | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/testcases/commands/df/df01.sh b/testcases/commands/df/df01.sh
index ae0449c3c..699d1538f 100755
--- a/testcases/commands/df/df01.sh
+++ b/testcases/commands/df/df01.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0-or-later
 # Copyright (c) 2015 Fujitsu Ltd.
-# Copyright (c) 2018-2022 Petr Vorel <pvorel@suse.cz>
+# Copyright (c) 2018-2023 Petr Vorel <pvorel@suse.cz>
 # Author: Zhang Jin <jy_zhangjin@cn.fujitsu.com>
 #
 # Test df command with some basic options.
@@ -46,6 +46,11 @@ df_test()
 
 	ROD_SILENT rm -rf $TST_MNTPOINT/testimg
 
+	# force all the background garbage collection to run to completion
+	if [ "$TST_FS_TYPE" = "xfs" ] && tst_kvcmp -ge "5.19"; then
+		tst_fsfreeze $TST_MNTPOINT
+	fi
+
 	# flush file system buffers, then we can get the actual sizes.
 	sync
 }
-- 
2.39.2