[PATCH v2 4/7] overlay: test encode/decode overlay file handles

[Amir Goldstein <amir73il@gmail.com>]

- Check encode/write/decode/read content of lower/upper file handles
- Check encode/decode/write/read content of lower/upper file handles
- Check decode/read of unlinked lower/upper files and directories
- Check decode/read of lower file handles after copy up, link and unlink

This test requires and enables overlayfs NFS export support.
NFS export support depends on and enables overlayfs index feature.

This test covers only encode/decode of file handles for overlayfs
configuration of all layers on the same base fs.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
---
 tests/overlay/050     | 237 ++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/overlay/050.out |  31 +++++++
 tests/overlay/group   |   1 +
 3 files changed, 269 insertions(+)
 create mode 100755 tests/overlay/050
 create mode 100644 tests/overlay/050.out

diff --git a/tests/overlay/050 b/tests/overlay/050
new file mode 100755
index 0000000..5619fed
--- /dev/null
+++ b/tests/overlay/050
@@ -0,0 +1,237 @@
+#! /bin/bash
+# FS QA Test No. 050
+#
+# Test encode/decode overlay file handles
+#
+# - Check encode/write/decode/read content of lower/upper file handles
+# - Check encode/decode/write/read content of lower/upper file handles
+# - Check decode/read of unlinked lower/upper files and directories
+# - Check decode/read of lower file handles after copy up, link and unlink
+#
+# This test requires and enables overlayfs NFS export support.
+# NFS export support depends on and enables overlayfs index feature.
+#
+#-----------------------------------------------------------------------
+# Copyright (C) 2018 CTERA Networks. All Rights Reserved.
+# Author: Amir Goldstein <amir73il@gmail.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+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 $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+
+_supported_fs overlay
+_supported_os Linux
+_require_scratch
+_require_test_program "open_by_handle"
+_require_scratch_feature nfs_export
+
+# All overlay dirs are on scratch partition
+lower=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
+upper=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
+work=$OVL_BASE_SCRATCH_MNT/$OVL_WORK
+
+NUMFILES=1
+
+# Create test dir and empty test files
+create_test_files()
+{
+	local dir=$1
+
+	mkdir -p $dir
+	$here/src/open_by_handle -cp $dir $NUMFILES
+}
+
+# Create hard links to test files
+link_test_files()
+{
+	local dir=$1
+
+	$here/src/open_by_handle -l $dir $NUMFILES
+}
+
+# Test encode/decode file handles on overlay mount
+test_file_handles()
+{
+	local dir=$1
+	local opt=$2
+
+	echo test_file_handles $dir $opt | _filter_scratch
+	$here/src/open_by_handle $opt $dir $NUMFILES
+}
+
+# Re-create lower/upper/work dirs
+create_dirs()
+{
+	_scratch_mkfs
+}
+
+# Mount an overlay on $SCRATCH_MNT with all layers on scratch partition
+mount_dirs()
+{
+	_scratch_mount -o nfs_export=on
+}
+
+# Unmount the overlay without unmounting base fs
+unmount_dirs()
+{
+	$UMOUNT_PROG $SCRATCH_MNT
+}
+
+# Check non-stale file handles of lower/upper files and verify
+# that handle encoded before copy up is decoded to upper after
+# copy up. Verify reading data from file open by file handle
+# and verify access_at() with dirfd open by file handle.
+create_dirs
+create_test_files $upper/uppertestdir
+create_test_files $lower/lowertestdir
+mount_dirs
+# Check encode/decode of upper regular file handles
+test_file_handles $SCRATCH_MNT/uppertestdir
+# Check encode/decode of upper dir file handle
+test_file_handles $SCRATCH_MNT/uppertestdir -p
+# Check encode/write/decode/read/write of upper file handles
+test_file_handles $SCRATCH_MNT/uppertestdir -wrap
+# Check encode/decode of lower regular file handles before copy up
+test_file_handles $SCRATCH_MNT/lowertestdir
+# Check encode/decode of lower dir file handles before copy up
+test_file_handles $SCRATCH_MNT/lowertestdir -p
+# Check encode/write/decode/read/write of lower file handles across copy up
+test_file_handles $SCRATCH_MNT/lowertestdir -wrap
+unmount_dirs
+
+# Check copy up after encode/decode of lower/upper files
+# (copy up of disconnected dentry to index dir)
+create_dirs
+create_test_files $upper/uppertestdir
+create_test_files $lower/lowertestdir
+mount_dirs
+# Check encode/decode/write/read of upper regular file handles
+test_file_handles $SCRATCH_MNT/uppertestdir -a
+test_file_handles $SCRATCH_MNT/uppertestdir -r
+# Check encode/decode/write/read of lower regular file handles
+test_file_handles $SCRATCH_MNT/lowertestdir -a
+test_file_handles $SCRATCH_MNT/lowertestdir -r
+unmount_dirs
+
+# Check non-stale handles to unlinked but open lower/upper files
+create_dirs
+create_test_files $upper/uppertestdir
+create_test_files $upper/uppertestdir.rw
+create_test_files $lower/lowertestdir
+create_test_files $lower/lowertestdir.rw
+mount_dirs
+test_file_handles $SCRATCH_MNT/uppertestdir -dk
+# Check encode/write/unlink/decode/read of upper regular file handles
+test_file_handles $SCRATCH_MNT/uppertestdir.rw -rwdk
+test_file_handles $SCRATCH_MNT/lowertestdir -dk
+# Check encode/write/unlink/decode/read of lower file handles across copy up
+test_file_handles $SCRATCH_MNT/lowertestdir.rw -rwdk
+unmount_dirs
+
+# Check stale handles of unlinked lower/upper files (nlink = 1,0)
+create_dirs
+create_test_files $upper/uppertestdir
+create_test_files $lower/lowertestdir
+mount_dirs
+# Check decode of upper file handles after unlink/rmdir (nlink == 0)
+test_file_handles $SCRATCH_MNT/uppertestdir -dp
+# Check decode of lower file handles after unlink/rmdir (nlink == 0)
+test_file_handles $SCRATCH_MNT/lowertestdir -dp
+unmount_dirs
+
+# Check non-stale file handles of linked lower/upper files (nlink = 1,2,1)
+create_dirs
+create_test_files $upper/uppertestdir
+create_test_files $lower/lowertestdir
+mount_dirs
+# Check decode/read of upper file handles after link (nlink == 2)
+test_file_handles $SCRATCH_MNT/uppertestdir -wlr
+# Check decode/read of upper file handles after link + unlink (nlink == 1)
+test_file_handles $SCRATCH_MNT/uppertestdir -ur
+# Check decode/read of lower file handles after copy up + link (nlink == 2)
+test_file_handles $SCRATCH_MNT/lowertestdir -wlr
+# Check decode/read of lower file handles after copy up + link + unlink (nlink == 1)
+test_file_handles $SCRATCH_MNT/lowertestdir -ur
+unmount_dirs
+
+# Check non-stale file handles of linked lower/upper hardlinks (nlink = 2,1)
+create_dirs
+create_test_files $upper/uppertestdir
+create_test_files $lower/lowertestdir
+# Create lower/upper hardlinks
+link_test_files $lower/lowertestdir
+link_test_files $upper/uppertestdir
+mount_dirs
+# Check encode/decode of upper hardlink file handles (nlink == 2)
+test_file_handles $SCRATCH_MNT/uppertestdir
+# Check decode/read of upper hardlink file handles after unlink (nlink == 1)
+test_file_handles $SCRATCH_MNT/uppertestdir -wur
+# Check encode/decode of lower hardlink file handles before copy up (nlink == 2)
+test_file_handles $SCRATCH_MNT/lowertestdir
+# Check decode/read of lower hardlink file handles after copy up + unlink (nlink == 1)
+test_file_handles $SCRATCH_MNT/lowertestdir -wur
+unmount_dirs
+
+# Check stale file handles of unlinked lower/upper hardlinks (nlink = 2,0)
+create_dirs
+create_test_files $upper/uppertestdir
+create_test_files $lower/lowertestdir
+# Create lower/upper hardlinks
+link_test_files $lower/lowertestdir
+link_test_files $upper/uppertestdir
+mount_dirs
+# Check encode/decode of upper hardlink file handles (nlink == 2)
+test_file_handles $SCRATCH_MNT/uppertestdir
+# Check decode of upper hardlink file handles after 2*unlink (nlink == 0)
+test_file_handles $SCRATCH_MNT/uppertestdir -d
+# Check encode/decode of lower hardlink file handles before copy up (nlink == 2)
+test_file_handles $SCRATCH_MNT/lowertestdir
+# Check decode of lower hardlink file handles after copy up + 2*unlink (nlink == 0)
+test_file_handles $SCRATCH_MNT/lowertestdir -d
+unmount_dirs
+
+# Check non-stale file handles of lower/upper renamed files
+create_dirs
+create_test_files $upper/uppertestdir
+create_test_files $lower/lowertestdir
+mount_dirs
+# Check decode/read of upper file handles after rename in same upper parent
+test_file_handles $SCRATCH_MNT/uppertestdir -wmr
+# Check decode/read of lower file handles after copy up + rename in same merge parent
+test_file_handles $SCRATCH_MNT/lowertestdir -wmr
+unmount_dirs
+
+status=0
+exit
diff --git a/tests/overlay/050.out b/tests/overlay/050.out
new file mode 100644
index 0000000..6e3d0be
--- /dev/null
+++ b/tests/overlay/050.out
@@ -0,0 +1,31 @@
+QA output created by 050
+test_file_handles SCRATCH_MNT/uppertestdir
+test_file_handles SCRATCH_MNT/uppertestdir -p
+test_file_handles SCRATCH_MNT/uppertestdir -wrap
+test_file_handles SCRATCH_MNT/lowertestdir
+test_file_handles SCRATCH_MNT/lowertestdir -p
+test_file_handles SCRATCH_MNT/lowertestdir -wrap
+test_file_handles SCRATCH_MNT/uppertestdir -a
+test_file_handles SCRATCH_MNT/uppertestdir -r
+test_file_handles SCRATCH_MNT/lowertestdir -a
+test_file_handles SCRATCH_MNT/lowertestdir -r
+test_file_handles SCRATCH_MNT/uppertestdir -dk
+test_file_handles SCRATCH_MNT/uppertestdir.rw -rwdk
+test_file_handles SCRATCH_MNT/lowertestdir -dk
+test_file_handles SCRATCH_MNT/lowertestdir.rw -rwdk
+test_file_handles SCRATCH_MNT/uppertestdir -dp
+test_file_handles SCRATCH_MNT/lowertestdir -dp
+test_file_handles SCRATCH_MNT/uppertestdir -wlr
+test_file_handles SCRATCH_MNT/uppertestdir -ur
+test_file_handles SCRATCH_MNT/lowertestdir -wlr
+test_file_handles SCRATCH_MNT/lowertestdir -ur
+test_file_handles SCRATCH_MNT/uppertestdir
+test_file_handles SCRATCH_MNT/uppertestdir -wur
+test_file_handles SCRATCH_MNT/lowertestdir
+test_file_handles SCRATCH_MNT/lowertestdir -wur
+test_file_handles SCRATCH_MNT/uppertestdir
+test_file_handles SCRATCH_MNT/uppertestdir -d
+test_file_handles SCRATCH_MNT/lowertestdir
+test_file_handles SCRATCH_MNT/lowertestdir -d
+test_file_handles SCRATCH_MNT/uppertestdir -wmr
+test_file_handles SCRATCH_MNT/lowertestdir -wmr
diff --git a/tests/overlay/group b/tests/overlay/group
index 7e541e4..6cb3763 100644
--- a/tests/overlay/group
+++ b/tests/overlay/group
@@ -49,3 +49,4 @@
 044 auto quick copyup hardlink nonsamefs
 047 auto quick copyup hardlink
 048 auto quick copyup hardlink
+050 auto quick copyup hardlink exportfs
-- 
2.7.4