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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Fujitsu. All Rights Reserved.
#
# FS QA Test 387
#
# Create a heavily reflinked file, then check whether we can truncate
# it correctly.
#
. ./common/preamble
_begin_fstest auto clone
# Import common functions.
. ./common/filter
. ./common/reflink
# Modify as appropriate.
_supported_fs generic
_require_scratch_reflink
#btrfs needs 256mb to create default blockgroup fs
_scratch_mkfs_sized $((256 * 1024 * 1024)) >> $seqres.full 2>&1
_scratch_mount
testfile=$SCRATCH_MNT/testfile
dummyfile=$SCRATCH_MNT/dummyfile
blocksize=$((128 * 1024))
# create a dummy file, which is used to occupy some fs space first.
_pwrite_byte 0xcdcdcdcd 0 $((1 * 1024 * 1024)) $dummyfile > /dev/null
_pwrite_byte 0xcdcdcdcd 0 $blocksize $testfile > /dev/null
echo "Silence is golden"
for ((i = 0; i < 16384; i++)); do
_reflink_range $testfile 0 $testfile $(($i * $blocksize)) \
$blocksize > /dev/null 2>&1
done
# consume all remaining free space
dd if=/dev/zero of=$SCRATCH_MNT/space >/dev/null 2>&1
sync
# fs is full now and fs internal operations may need some free space, for
# example, in btrfs, transaction will need to reserve space first, so here free
# 1MB space.
rm -f $dummyfile
$XFS_IO_PROG -f -c "truncate 0" $testfile
status=0
exit
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