apfstests/tests/xfs/521

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (c) 2020, Oracle and/or its affiliates.  All Rights Reserved.
#
# FS QA Test No. 521
#
# Tests xfs_growfs on the realtime volume to make sure none of it blows up.
# This is a regression test for the following patches:
#
# xfs: Set xfs_buf type flag when growing summary/bitmap files
# xfs: Set xfs_buf's b_ops member when zeroing bitmap/summary files
# xfs: fix realtime bitmap/summary file truncation when growing rt volume
# xfs: make xfs_growfs_rt update secondary superblocks
# xfs: annotate grabbing the realtime bitmap/summary locks in growfs
#
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 /
	_scratch_unmount >> $seqres.full 2>&1
	test -e "$rtdev" && losetup -d $rtdev >> $seqres.full 2>&1
	rm -f $tmp.* $TEST_DIR/$seq.rtvol
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

# real QA test starts here
_supported_fs xfs
# Note that we don't _require_realtime because we synthesize a rt volume
# below.
_require_scratch_nocheck
_require_no_large_scratch_dev

echo "Create fake rt volume"
truncate -s 400m $TEST_DIR/$seq.rtvol
rtdev=$(_create_loop_device $TEST_DIR/$seq.rtvol)

echo "Format and mount 100m rt volume"
export USE_EXTERNAL=yes
export SCRATCH_RTDEV=$rtdev
_scratch_mkfs -r size=100m > $seqres.full
_try_scratch_mount || _notrun "Could not mount scratch with synthetic rt volume"

testdir=$SCRATCH_MNT/test-$seq
mkdir $testdir

echo "Check rt volume stats"
$XFS_IO_PROG -c 'chattr +t' $testdir
$XFS_INFO_PROG $SCRATCH_MNT >> $seqres.full
before=$(stat -f -c '%b' $testdir)

echo "Create some files"
_pwrite_byte 0x61 0 1m $testdir/original >> $seqres.full

echo "Grow fs"
$XFS_GROWFS_PROG $SCRATCH_MNT 2>&1 |  _filter_growfs >> $seqres.full
_scratch_cycle_mount

echo "Recheck 400m rt volume stats"
$XFS_INFO_PROG $SCRATCH_MNT >> $seqres.full
after=$(stat -f -c '%b' $testdir)
_within_tolerance "rt volume size" $after $((before * 4)) 5% -v

echo "Create more copies to make sure the bitmap really works"
cp -p $testdir/original $testdir/copy3

echo "Check filesystem"
_check_scratch_fs

# success, all done
status=0
exit