#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2017 IBM Corporation. All Rights Reserved.
#
# FSQA Test No. 041
#
# Test consistent d_ino numbers on non-samefs setup
# This is a variant of overlay/038 to test consistent d_ino numbers
# for non-samefs setup.
#
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
. ./common/attr

# real QA test starts here
_supported_fs overlay
# Use non-default scratch underlying overlay dirs, we need to check
# them explicity after test.
_require_scratch_nocheck
_require_test
_require_attrs trusted
_require_test_program "t_dir_type"

rm -f $seqres.full

lowerdir=$OVL_BASE_TEST_DIR/$seq-ovl-lower
rm -rf $lowerdir
mkdir $lowerdir

# Create our test files.
mkdir -p $lowerdir/test_dir/pure_lower_dir/subdir
touch $lowerdir/test_file

_scratch_mkfs

upperdir=$OVL_BASE_SCRATCH_MNT/$OVL_UPPER
workdir=$OVL_BASE_SCRATCH_MNT/$OVL_WORK

# Enabling xino in this test requires that base filesystem inode numbers will
# not use bit 63 in inode number of the test files, because bit 63 is used by
# overlayfs to indicate the layer. Let's just assume that this is true for all
# tested filesystems and if we are wrong, the test may fail.
_overlay_scratch_mount_dirs $lowerdir $upperdir $workdir -o xino=on || \
	_notrun "cannot mount overlay with xino=on option"
_fs_options $SCRATCH_DEV | grep -q "xino=on" || \
	_notrun "cannot enable xino feature"

test_dir=$SCRATCH_MNT/test_dir/

# Verify d_ino of '.' and '..' before and after dir becomes impure.
impure_dir=$test_dir/impure_dir
mkdir -p $impure_dir/subdir

impure_dir_st_ino=$(stat -c '%i' $impure_dir)
impure_dir_parent_st_ino=$(stat -c '%i' $test_dir)
impure_subdir_st_ino=$(stat -c '%i' $impure_dir/subdir)

# Before $impure_dir becomes impure
parent_d=$($here/src/t_dir_type $impure_dir $impure_dir_parent_st_ino)
[[ $parent_d == ".. d" ]] || \
    echo "Pure upper dir: Invalid d_ino reported for .."

current_d=$($here/src/t_dir_type $impure_dir $impure_dir_st_ino)
[[ $current_d == ". d" ]] || \
    echo "Pure upper dir: Invalid d_ino reported for ."

subdir_d=$($here/src/t_dir_type $impure_dir $impure_subdir_st_ino)
[[ $subdir_d == "subdir d" ]] || \
    echo "Pure upper dir: Invalid d_ino reported for subdir"

# Move a copied up file into pure dir to make it impure
mv $SCRATCH_MNT/test_file $impure_dir
test_file_st_ino=$(stat -c '%i' $impure_dir/test_file)

impure=$(_getfattr --absolute-names --only-values -n 'trusted.overlay.impure' \
			$upperdir/test_dir/impure_dir)
[[ $impure == "y" ]] || echo "Impure directory missing impure xattr"

# After $impure_dir becomes impure
parent_d=$($here/src/t_dir_type $impure_dir $impure_dir_parent_st_ino)
[[ $parent_d == ".. d" ]] || \
    echo "Impure dir: Invalid d_ino reported for .."

current_d=$($here/src/t_dir_type $impure_dir $impure_dir_st_ino)
[[ $current_d == ". d" ]] || \
    echo "Impure dir: Invalid d_ino reported for ."

subdir_d=$($here/src/t_dir_type $impure_dir $impure_subdir_st_ino)
[[ $subdir_d == "subdir d" ]] || \
    echo "Impure dir: Invalid d_ino reported for subdir"

# Verify copy up file's d_ino
file_d=$($here/src/t_dir_type $impure_dir $test_file_st_ino)
[[ $file_d == "test_file f" ]] || \
	echo "Impure dir: Invalid d_ino reported for entry with copy-up origin"

# Make $impure_dir pure
rm -rf $impure_dir/test_file
rm -rf $impure_dir/subdir

# Verify invalidation of readdir cache
$here/src/t_dir_type $impure_dir $test_file_st_ino
[[ $? != 0 ]] || echo "Directory's readdir cache has stale file entries"
$here/src/t_dir_type $impure_dir $impure_subdir_st_ino
[[ $? != 0 ]] || echo "Directory's readdir cache has stale subdir entries"

impure=$(_getfattr --absolute-names --only-values -n 'trusted.overlay.impure' \
			$upperdir/test_dir/impure_dir 2>/dev/null)
[[ -z $impure ]] || echo "Pure directory has impure xattr"

# Verify d_ino values of subdir entries of a pure lower dir.
parent_st_ino=$(stat -c '%i' $test_dir)
pure_lower_dir=$SCRATCH_MNT/test_dir/pure_lower_dir
pure_lower_dir_st_ino=$(stat -c '%i' $pure_lower_dir)
pure_lower_subdir_st_ino=$(stat -c '%i' $pure_lower_dir/subdir)

parent_d=$($here/src/t_dir_type $pure_lower_dir $parent_st_ino)
[[ $parent_d == ".. d" ]] || \
	echo "Pure lower dir: Invalid d_ino reported for .."

current_d=$($here/src/t_dir_type $pure_lower_dir $pure_lower_dir_st_ino)
[[ $current_d == ". d" ]] || \
	echo "Pure lower dir: Invalid d_ino reported for ."

subdir_d=$($here/src/t_dir_type $pure_lower_dir $pure_lower_subdir_st_ino)
[[ $subdir_d == "subdir d" ]] || \
	echo "Pure lower dir: Invalid d_ino reported for subdir"

# Create a file in pure lower dir to make it a merge dir
touch $pure_lower_dir/newfile

parent_d=$($here/src/t_dir_type $pure_lower_dir $parent_st_ino)
[[ $parent_d == ".. d" ]] || \
	echo "Merged dir: Invalid d_ino reported for .."

current_d=$($here/src/t_dir_type $pure_lower_dir $pure_lower_dir_st_ino)
[[ $current_d == ". d" ]] || \
	echo "Merged dir: Invalid d_ino reported for ."

subdir_d=$($here/src/t_dir_type $pure_lower_dir $pure_lower_subdir_st_ino)
[[ $subdir_d == "subdir d" ]] || \
	echo "Merged dir: Invalid d_ino reported for subdir"

$UMOUNT_PROG $SCRATCH_MNT

# check overlayfs
_overlay_check_scratch_dirs $lowerdir $upperdir $workdir -o xino=on

# Verify pure lower residing in dir which has another lower layer
middir=$OVL_BASE_TEST_DIR/$seq-ovl-mid
lowerdir=$OVL_BASE_TEST_DIR/$seq-ovl-lower
rm -rf $middir
rm -rf $lowerdir
mkdir $middir
mkdir $lowerdir

mkdir -p $middir/test_dir
mkdir -p $lowerdir/test_dir/pure_lower_dir/subdir

_scratch_mkfs

_overlay_scratch_mount_dirs $middir:$lowerdir $upperdir $workdir -o xino=on

# Copy up test_dir
touch $test_dir/test_file

test_dir_st_ino=$(stat -c '%i' $test_dir)
pure_lower_dir=$test_dir/pure_lower_dir
pure_lower_dir_st_ino=$(stat -c '%i' $pure_lower_dir)
pure_lower_subdir_st_ino=$(stat -c '%i' $pure_lower_dir/subdir)

parent_d=$($here/src/t_dir_type $pure_lower_dir $test_dir_st_ino)
[[ $parent_d == ".. d" ]] || \
	echo "Pure lower in dir which has another lower layer: Invalid d_ino reported for .."

current_d=$($here/src/t_dir_type $pure_lower_dir $pure_lower_dir_st_ino)
[[ $current_d == ". d" ]] || \
	echo "Pure lower in dir which has another lower layer: Invalid d_ino reported for ."

subdir_d=$($here/src/t_dir_type $pure_lower_dir $pure_lower_subdir_st_ino)
[[ $subdir_d == "subdir d" ]] || \
	echo "Pure lower in dir which has another lower layer: Invalid d_ino reported for subdir"

# check overlayfs
_overlay_check_scratch_dirs "$middir:$lowerdir" $upperdir $workdir -o xino=on

echo "Silence is golden"
status=0
exit