tests/btrfs/091

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015 Fujitsu. All Rights Reserved.
#
# FS QA Test No. 091
#
# Test for incorrect exclusive reference count after cloning file
# between subvolumes.
#
. ./common/preamble
_begin_fstest auto quick qgroup

# Import common functions.
. ./common/filter
. ./common/reflink

# real QA test starts here

_supported_fs btrfs
_require_scratch
_require_cp_reflink
_require_scratch_qgroup

# use largest node/leaf size (64K) to allow the test to be run on arch with
# page size > 4k.
NODESIZE=65536

run_check _scratch_mkfs "--nodesize $NODESIZE"

# discard error output since we will check return value manually.
# also disable all compression, or output will mismatch with golden output
_try_scratch_mount "-o compress=no,compress-force=no" 2> /dev/null

_run_btrfs_util_prog subvolume create $SCRATCH_MNT/subv1
_run_btrfs_util_prog subvolume create $SCRATCH_MNT/subv2
_run_btrfs_util_prog subvolume create $SCRATCH_MNT/subv3

_run_btrfs_util_prog quota enable $SCRATCH_MNT
_qgroup_rescan $SCRATCH_MNT

$XFS_IO_PROG -f -c "pwrite 0 256K" $SCRATCH_MNT/subv1/file1 | _filter_xfs_io
cp --reflink $SCRATCH_MNT/subv1/file1 $SCRATCH_MNT/subv2/file1
cp --reflink $SCRATCH_MNT/subv1/file1 $SCRATCH_MNT/subv3/file1

# Current btrfs use tree search ioctl to show quota, which will only show info
# in commit tree. So need to sync to update the qgroup commit tree.
sync

units=`_btrfs_qgroup_units`
$BTRFS_UTIL_PROG qgroup show $units $SCRATCH_MNT | $SED_PROG -n '/[0-9]/p' | \
	$AWK_PROG '{print $2" "$3}'

# success, all done
status=0
exit