[PATCH] generic: Verify the inheritance behavior of FS_XFLAG_DAX flag in various combinations

[Xiao Yang <yangx.jy@cn.fujitsu.com>]

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---

Note: this patch depends on the following patches:
https://www.spinics.net/lists/fstests/msg14252.html
https://www.spinics.net/lists/fstests/msg14272.html

 tests/generic/605     | 169 ++++++++++++++++++++++++++++++++++++++++++
 tests/generic/605.out |   2 +
 tests/generic/group   |   1 +
 3 files changed, 172 insertions(+)
 create mode 100644 tests/generic/605
 create mode 100644 tests/generic/605.out

diff --git a/tests/generic/605 b/tests/generic/605
new file mode 100644
index 00000000..c44271e8
--- /dev/null
+++ b/tests/generic/605
@@ -0,0 +1,169 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2020 Fujitsu.  All Rights Reserved.
+#
+# FS QA Test 605
+#
+# Verify the inheritance behavior of FS_XFLAG_DAX flag in various combinations.
+# 1) New files and directories automatically inherit FS_XFLAG_DAX from their parent directory.
+# 2) cp operation make files and directories inherit the FS_XFLAG_DAX from new parent directory.
+# 3) mv operation make files and directories preserve the FS_XFLAG_DAX from old parent directory.
+# In addition, setting/clearing FS_XFLAG_DAX flag is not impacted by dax mount options.
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1        # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+_supported_fs generic
+_supported_os Linux
+_require_scratch_dax_mountopt "dax=always"
+_require_scratch_dax_iflag
+_require_xfs_io_command "lsattr"
+
+check_xflag()
+{
+	local target=$1
+	local exp_xflag=$2
+
+	if [ $exp_xflag -eq 0 ]; then
+		_test_inode_flag dax $target && echo "$target has unexpected FS_XFLAG_DAX flag"
+	else
+		_test_inode_flag dax $target || echo "$target doen't have expected FS_XFLAG_DAX flag"
+	fi
+}
+
+test_xflag_inheritance1()
+{
+	mkdir -p a
+	$XFS_IO_PROG -c "chattr +x" a
+	mkdir -p a/b/c
+	touch a/b/c/d
+
+	check_xflag a 1
+	check_xflag a/b 1
+	check_xflag a/b/c 1
+	check_xflag a/b/c/d 1
+
+	rm -rf a
+}
+
+test_xflag_inheritance2()
+{
+	mkdir -p a/b
+	$XFS_IO_PROG -c "chattr +x" a
+	mkdir -p a/b/c a/d
+	touch a/b/c/e a/d/f
+
+	check_xflag a 1
+	check_xflag a/b 0
+	check_xflag a/b/c 0
+	check_xflag a/b/c/e 0
+	check_xflag a/d 1
+	check_xflag a/d/f 1
+
+	rm -rf a
+}
+
+test_xflag_inheritance3()
+{
+	mkdir -p a/b
+	$XFS_IO_PROG -c "chattr +x" a/b
+	mkdir -p a/b/c a/d
+	touch a/b/c/e a/d/f
+
+	check_xflag a 0
+	check_xflag a/b 1
+	check_xflag a/b/c 1
+	check_xflag a/b/c/e 1
+	check_xflag a/d 0
+	check_xflag a/d/f 0
+
+	rm -rf a
+}
+
+test_xflag_inheritance4()
+{
+	mkdir -p a
+	$XFS_IO_PROG -c "chattr +x" a
+	mkdir -p a/b/c
+	$XFS_IO_PROG -c "chattr -x" a/b
+	mkdir -p a/b/c/d a/b/e
+	touch a/b/c/d/f a/b/e/g
+
+	check_xflag a 1
+	check_xflag a/b 0
+	check_xflag a/b/c 1
+	check_xflag a/b/c/d 1
+	check_xflag a/b/c/d/f 1
+	check_xflag a/b/e 0
+	check_xflag a/b/e/g 0
+
+	rm -rf a
+}
+
+test_xflag_inheritance5()
+{
+	mkdir -p a b
+	$XFS_IO_PROG -c "chattr +x" a
+	mkdir -p a/c a/d b/e b/f
+	touch a/g b/h
+
+	cp -r a/c b/
+	cp -r b/e a/
+	cp -r a/g b/
+	mv a/d b/
+	mv b/f a/
+	mv b/h a/
+
+	check_xflag b/c 0
+	check_xflag b/d 1
+	check_xflag a/e 1
+	check_xflag a/f 0
+	check_xflag b/g 0
+	check_xflag a/h 0
+
+	rm -rf a b
+}
+
+do_tests()
+{
+	# Mount with various dax options
+	for dax_option in "dax=always" "dax=inode" "dax=never"; do
+		_scratch_mount "-o $dax_option"
+		cd $SCRATCH_MNT
+
+		for i in $(seq 1 5); do
+			test_xflag_inheritance${i}
+		done
+
+		cd - > /dev/null
+		_scratch_unmount
+	done
+}
+
+_scratch_mkfs >> $seqres.full 2>&1
+
+do_tests
+
+# success, all done
+echo "Silence is golden"
+status=0
+exit
diff --git a/tests/generic/605.out b/tests/generic/605.out
new file mode 100644
index 00000000..1ae20049
--- /dev/null
+++ b/tests/generic/605.out
@@ -0,0 +1,2 @@
+QA output created by 605
+Silence is golden
diff --git a/tests/generic/group b/tests/generic/group
index 676e0d2e..a8451862 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -607,3 +607,4 @@
 602 auto quick encrypt
 603 auto attr quick dax
 604 auto attr quick dax
+605 auto attr quick dax
-- 
2.21.0