[PATCH] generic: Verify if statx() can qurey S_SAX flag on regular file correctly

Xiao Yang
2020-07-02T06:43:04Z

With new kernel(e.g. v5.8-rc1), statx() can be used to qurey S_SAX flag
on regular file, so add a test to verify the feature.

Reference:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=712b2698e4c024b561694cbcc1abba13eb0fd9ce

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

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

tests/generic/604 | 100 ++++++++++++++++++++++++++++++++++++++++++
tests/generic/604.out | 2 +
tests/generic/group | 1 +
3 files changed, 103 insertions(+)
create mode 100644 tests/generic/604
create mode 100644 tests/generic/604.out

diff --git a/tests/generic/604 b/tests/generic/604
new file mode 100644
index 00000000..b0baa781
--- /dev/null
+++ b/tests/generic/604
@@ -0,0 +1,100 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2020 Fujitsu. All Rights Reserved.
+#
+# FS QA Test 604
+#
+# By the following cases, verify if statx() can query S_SAX flag
+# on regular file correctly.
+# 1) With dax=always option, FS_XFLAG_DAX is ignored and S_SAX flag
+# always exists on regular file.
+# 2) With dax=inode option, setting/clearing FS_XFLAG_DAX can change
+# S_SAX flag on regular file.
+# 3) With dax=never option, FS_XFLAG_DAX is ignored and S_SAX flag
+# never exists on regular file.
+#
+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 $seqres.full
+
+_supported_fs generic
+_supported_os Linux
+_require_scratch_dax_mountopt "dax=always"
+_require_scratch_dax_iflag
+_require_xfs_io_command "statx" "-r"
+
+PARENT_DIR=$SCRATCH_MNT/testdir
+TEST_FILE=$PARENT_DIR/testfile
+
+check_s_dax()
+{
+ local exp_s_dax=$1
+
+ local attributes=$($XFS_IO_PROG -c 'statx -r' $TEST_FILE | awk '/stat.attributes / { print $3 }')
+ if [ $exp_s_dax -eq 0 ]; then
+ (( attributes & 0x2000 )) && echo "$TEST_FILE has unexpected S_DAX flag"
+ else
+ (( attributes & 0x2000 )) || echo "$TEST_FILE doen't have expected S_DAX flag"
+ fi
+}
+
+test_s_dax()
+{
+ local dax_option=$1
+ local exp_s_dax1=$2
+ local exp_s_dax2=$3
+
+ # Mount with specified dax option
+ _scratch_mount "-o $dax_option"
+
+ # Prepare directory
+ mkdir -p $PARENT_DIR
+
+ rm -f $TEST_FILE
+ $XFS_IO_PROG -c "chattr +x" $PARENT_DIR
+ touch $TEST_FILE
+ # Check if setting FS_XFLAG_DAX changes S_DAX flag
+ check_s_dax $exp_s_dax1
+
+ rm -f $TEST_FILE
+ $XFS_IO_PROG -c "chattr -x" $PARENT_DIR
+ touch $TEST_FILE
+ # Check if clearing FS_XFLAG_DAX changes S_DAX flag
+ check_s_dax $exp_s_dax2
+
+ _scratch_unmount
+}
+
+do_tests()
+{
+ test_s_dax "dax=always" 1 1
+ test_s_dax "dax=inode" 1 0
+ test_s_dax "dax=never" 0 0
+}
+
+_scratch_mkfs >> $seqres.full 2>&1
+
+do_tests
+
+# success, all done
+echo "Silence is golden"
+status=0
+exit
diff --git a/tests/generic/604.out b/tests/generic/604.out
new file mode 100644
index 00000000..c06a1c7f
--- /dev/null
+++ b/tests/generic/604.out
@@ -0,0 +1,2 @@
+QA output created by 604
+Silence is golden
diff --git a/tests/generic/group b/tests/generic/group
index 1d0d5606..676e0d2e 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -606,3 +606,4 @@
601 auto quick quota
602 auto quick encrypt
603 auto attr quick dax
+604 auto attr quick dax
--
2.21.0