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Subject[PATCH] xfs/XXX: Add xfs/XXX
Date
From: Ira Weiny <ira.weiny@intel.com>

Add XXX to test per file DAX operations.

The following is tested[*]

- Applications must call statx to discover the current S_DAX state.

- There exists an advisory file inode flag FS_XFLAG_DAX that is set based on
the parent directory FS_XFLAG_DAX inode flag. (There is no way to change
this flag after file creation.)

If FS_XFLAG_DAX is set and the fs is on pmem then it will enable S_DAX at
inode load time; if FS_XFLAG_DAX is not set, it will not enable S_DAX.
Unless overridden...

- There exists a dax= mount option.

"-o dax=never" means "never set S_DAX, ignore FS_XFLAG_DAX"
"-o dax=always" means "always set S_DAX (at least on pmem), ignore FS_XFLAG_DAX"
"-o dax" (old option) by itself means "dax=always"
"-o dax=iflag" means "follow FS_XFLAG_DAX" and is the default

- There exists an advisory directory inode flag FS_XFLAG_DAX that can be
changed at any time. The flag state is copied into any files or
subdirectories when they are created within that directory. If programs
require file access runs in S_DAX mode, they must create those files
inside a directory with FS_XFLAG_DAX set, or mount the fs with an
appropriate dax mount option.

[*] https://lore.kernel.org/lkml/20200405061945.GA94792@iweiny-DESK2.sc.intel.com/

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
tests/xfs/999 | 231 ++++++++++++++++++++++++++++++++++++++++++++++
tests/xfs/999.out | 21 +++++
tests/xfs/group | 1 +
3 files changed, 253 insertions(+)
create mode 100755 tests/xfs/999
create mode 100644 tests/xfs/999.out

diff --git a/tests/xfs/999 b/tests/xfs/999
new file mode 100755
index 000000000000..4d3048616715
--- /dev/null
+++ b/tests/xfs/999
@@ -0,0 +1,231 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2019 Intel, Corp. All Rights Reserved.
+#
+# FSQA Test No. 999 (temporary)
+#
+# Test setting of DAX flag
+#
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+status=1 # failure is the default!
+
+dax_dir=$TEST_DIR/dax-dir
+dax_sub_dir=$TEST_DIR/dax-dir/dax-sub-dir
+dax_inh_file=$dax_dir/dax-inh-file
+dax_non_inh_file=$dax_dir/dax-non-inh-file
+non_dax=$TEST_DIR/non-dax
+dax_file=$TEST_DIR/dax-dir/dax-file
+dax_file_copy=$TEST_DIR/dax-file-copy
+dax_file_move=$TEST_DIR/dax-file-move
+data_file=$TEST_DIR/data-file
+
+_cleanup() {
+ rm -rf $TEST_DIR/*
+}
+
+trap "_cleanup ; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common/rc
+
+# real QA test starts here
+_supported_os Linux
+_require_xfs_io_command "lsattr"
+_require_xfs_io_command "statx"
+_require_test
+
+#
+# mnt_opt's we expect
+# ''
+# '-o dax=off'
+# '-o dax=iflag'
+# '-o dax'
+# '-o dax=always'
+function remount_w_option {
+ mnt_opt=$1
+ export MOUNT_OPTIONS=""
+ export TEST_FS_MOUNT_OPTS=""
+ _test_unmount
+ _test_mount $mnt_opt
+}
+
+function check_dax_mount_option {
+ mnt_opt=$1
+ _fs_options $TEST_DEV | grep -qw '$mnt_opt'
+ if [ "$?" == "0" ]; then
+ echo "FAILED: to mount FS with option '$mnt_opt'"
+ status=1; exit
+ fi
+}
+
+function check_xflag_dax {
+ xfs_io -c 'lsattr' $1 | awk -e '{ print $1 }' | grep 'x' &> /dev/null
+ if [ "$?" != "0" ]; then
+ echo "FAILED: Did NOT find FS_XFLAG_DAX on $1"
+ status=1; exit
+ fi
+}
+
+function check_s_dax {
+ attr=`xfs_io -c 'statx -r' $1 | grep 'stat.attributes' | awk -e '{ print $3 }'`
+ masked=$(( $attr & 0x2000 ))
+ if [ "$masked" != "8192" ]; then
+ echo "FAILED: Did NOT find S_DAX flag on $1"
+ status=1; exit
+ fi
+}
+
+function check_no_xflag_dax {
+ xfs_io -c 'lsattr' $1 | awk -e '{ print $1 }' | grep 'x' &> /dev/null
+ if [ "$?" == "0" ]; then
+ echo "FAILED: Found FS_XFLAG_DAX on $1"
+ status=1; exit
+ fi
+}
+
+function check_no_s_dax {
+ attr=`xfs_io -c 'statx -r' $1 | grep 'stat.attributes' | awk -e '{ print $3 }'`
+ masked=$(( $attr & 0x2000 ))
+ if [ "$masked" == "8192" ]; then
+ echo "FAILED: Found S_DAX flag on $1"
+ status=1; exit
+ fi
+}
+
+echo "running tests..."
+
+remount_w_option ""
+check_dax_mount_option "dax=iflag"
+
+echo " *** mark dax-dir as dax enabled"
+mkdir $dax_dir
+xfs_io -c 'chattr +x' $dax_dir
+check_xflag_dax $dax_dir
+
+echo " *** check file inheritance"
+touch $dax_inh_file
+check_xflag_dax $dax_inh_file
+check_s_dax $dax_inh_file
+
+echo " *** check directory inheritance"
+mkdir $dax_sub_dir
+check_xflag_dax $dax_sub_dir
+
+echo " *** check changing directory"
+xfs_io -c 'chattr -x' $dax_dir
+check_no_xflag_dax $dax_dir
+check_no_s_dax $dax_dir
+
+echo " *** check non file inheritance"
+touch $dax_non_inh_file
+check_no_xflag_dax $dax_non_inh_file
+check_no_s_dax $dax_non_inh_file
+
+echo " *** check that previous file stays enabled"
+check_xflag_dax $dax_inh_file
+check_s_dax $dax_inh_file
+
+echo " *** Reset the directory"
+xfs_io -c 'chattr +x' $dax_dir
+check_xflag_dax $dax_dir
+
+# Set up for next test
+touch $dax_file
+touch $non_dax
+
+#
+# inode flag
+# ./
+# + dax-dir/ X
+# + dax-sub-dir/ X
+# + dax-inh-file X
+# + dax-non-inh-file
+# + dax-file X
+# + non-dax
+#
+
+# check mount overrides
+# =====================
+
+echo " *** Check '-o dax'"
+remount_w_option "-o dax"
+check_dax_mount_option "dax=always"
+
+echo " *** non-dax inode but overrides to be effective"
+check_no_xflag_dax $non_dax
+check_s_dax $non_dax
+
+echo " *** Check for non-dax inode to be dax with mount option"
+check_no_xflag_dax $dax_non_inh_file
+check_s_dax $dax_non_inh_file
+
+
+echo " *** Check '-o dax=never'"
+remount_w_option "-o dax=never"
+check_dax_mount_option "dax=never"
+
+check_xflag_dax $dax_dir
+check_xflag_dax $dax_sub_dir
+check_xflag_dax $dax_inh_file
+check_no_s_dax $dax_inh_file
+check_no_xflag_dax $dax_non_inh_file
+check_no_s_dax $dax_non_inh_file
+check_no_xflag_dax $non_dax
+check_no_s_dax $non_dax
+check_xflag_dax $dax_file
+check_no_s_dax $dax_file
+
+
+echo " *** Check '-o dax=iflag'"
+remount_w_option "-o dax=iflag"
+check_dax_mount_option "dax=iflag"
+
+check_xflag_dax $dax_dir
+check_xflag_dax $dax_sub_dir
+check_xflag_dax $dax_inh_file
+check_s_dax $dax_inh_file
+check_no_xflag_dax $dax_non_inh_file
+check_no_s_dax $dax_non_inh_file
+check_no_xflag_dax $non_dax
+check_no_s_dax $non_dax
+check_xflag_dax $dax_file
+check_s_dax $dax_file
+
+
+# Check non-zero file operations
+# ==============================
+
+echo " *** Verify setting FS_XFLAG_DAX flag fails"
+$XFS_IO_PROG -f -c "pwrite 0 10000" $data_file > /dev/null
+xfs_io -c 'chattr +x' $data_file
+check_no_xflag_dax $data_file
+check_no_s_dax $data_file
+
+
+# Check inheritance on cp, mv
+# ===========================
+
+echo " *** check making 'data' dax with cp"
+cp $non_dax $dax_dir/conv-dax
+check_xflag_dax $dax_dir/conv-dax
+check_s_dax $dax_dir/conv-dax
+
+echo " *** check making 'data' non-dax with cp"
+rm -f $data_file
+cp $dax_dir/conv-dax $data_file
+check_no_xflag_dax $data_file
+check_no_s_dax $data_file
+
+echo " *** Moved files 'don't inherit'"
+mv $non_dax $dax_dir/move-dax
+check_no_xflag_dax $dax_dir/move-dax
+check_no_s_dax $dax_dir/move-dax
+
+echo " *** Check '-o dax=garbage'"
+remount_w_option "-o dax=garbage"
+
+status=0 ; exit
diff --git a/tests/xfs/999.out b/tests/xfs/999.out
new file mode 100644
index 000000000000..3b204d4643a5
--- /dev/null
+++ b/tests/xfs/999.out
@@ -0,0 +1,21 @@
+QA output created by 999
+running tests...
+ *** mark dax-dir as dax enabled
+ *** check file inheritance
+ *** check directory inheritance
+ *** check changing directory
+ *** check non file inheritance
+ *** check that previous file stays enabled
+ *** Reset the directory
+ *** Check '-o dax'
+ *** non-dax inode but overrides to be effective
+ *** Check for non-dax inode to be dax with mount option
+ *** Check '-o dax=never'
+ *** Check '-o dax=iflag'
+ *** Verify setting FS_XFLAG_DAX flag fails
+xfs_io: cannot set flags on /mnt/xfstests_test/data-file: Invalid argument
+ *** check making 'data' dax with cp
+ *** check making 'data' non-dax with cp
+ *** Moved files 'don't inherit'
+ *** Check '-o dax=garbage'
+mount: /mnt/xfstests_test: wrong fs type, bad option, bad superblock on /dev/pmem0p1, missing codepage or helper program, or other error.
diff --git a/tests/xfs/group b/tests/xfs/group
index 522d4bc44d1f..816883a268bf 100644
--- a/tests/xfs/group
+++ b/tests/xfs/group
@@ -511,3 +511,4 @@
511 auto quick quota
512 auto quick acl attr
513 auto mount
+999 auto
--
2.25.1
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