tests/xfs/129

#! /bin/bash
# FS QA Test No. 129
#
# Ensure that we can create enough distinct reflink entries to force creation
# of a multi-level refcount btree, and that metadump will successfully copy
# said block.
#
#-----------------------------------------------------------------------
# Copyright (c) 2015, Oracle and/or its affiliates.  All Rights Reserved.
#
# 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 /
    _scratch_unmount > /dev/null 2>&1
    rm -rf $tmp.* $testdir $metadump_file $TEST_DIR/image
}

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

# real QA test starts here
_supported_os Linux
_supported_fs xfs
_require_loop
_require_scratch_reflink

rm -f $seqres.full

_scratch_mkfs >/dev/null 2>&1
_scratch_mount

testdir=$SCRATCH_MNT/test-$seq
mkdir $testdir
metadump_file=$TEST_DIR/${seq}_metadump

echo "Create the original file blocks"
blksz="$(_get_block_size $testdir)"
nr_blks=$((4 * blksz / 12))
_pwrite_byte 0x61 0 $((blksz * nr_blks)) $testdir/file1 >> $seqres.full

echo "Reflink every other block"
seq 1 2 $((nr_blks - 1)) | while read nr; do
	_reflink_range  $testdir/file1 $((nr * blksz)) \
			$testdir/file2 $((nr * blksz)) $blksz >> $seqres.full
done

echo "Create metadump file"
_scratch_unmount
_scratch_metadump $metadump_file

# Now restore the obfuscated one back and take a look around
echo "Restore metadump"
xfs_mdrestore $metadump_file $TEST_DIR/image
SCRATCH_DEV=$TEST_DIR/image _scratch_mount
SCRATCH_DEV=$TEST_DIR/image _scratch_unmount

echo "Check restored fs"
_check_generic_filesystem $metadump_file

# success, all done
status=0
exit