blob: e42013f9e435fc17b41312cc16fb2d9a0e03f31b [file] [log] [blame]
#! /bin/bash
# FS QA Test No. 230
#
# Ensuring that copy on write in buffered mode works when the CoW
# range originally covers multiple extents, some unwritten, some not.
# - Set cowextsize hint.
# - Create a file with the following repeating sequence of blocks:
# 1. reflinked
# 2. unwritten
# 3. hole
# 4. regular block
# 5. delalloc
# - CoW across the halfway mark, starting with the unwritten extent.
# - Check that the files are now different where we say they're different.
#
#-----------------------------------------------------------------------
# Copyright (c) 2016, 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 /
rm -rf $tmp.*
}
# get standard environment, filters and checks
. ./common/rc
. ./common/filter
. ./common/reflink
# real QA test starts here
_supported_os Linux
_require_scratch_reflink
_require_xfs_io_command "falloc"
_require_xfs_io_command "cowextsize"
_require_xfs_io_command "fpunch"
_require_cp_reflink
_require_odirect
rm -f $seqres.full
echo "Format and mount"
_scratch_mkfs > $seqres.full 2>&1
_scratch_mount >> $seqres.full 2>&1
testdir=$SCRATCH_MNT/test-$seq
mkdir $testdir
echo "Create the original files"
blksz=65536
nr=64
filesize=$((blksz * nr))
real_blksz=$(_get_block_size $testdir)
internal_blks=$((filesize / real_blksz))
$XFS_IO_PROG -c "cowextsize $((blksz * 16))" $testdir >> $seqres.full
_weave_reflink_rainbow $blksz $nr $testdir/file1 $testdir/file3 >> $seqres.full
_scratch_cycle_mount
echo "Compare files"
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file3 | _filter_scratch
md5sum $testdir/file3.chk | _filter_scratch
echo "directio CoW across the transition"
cowoff=$((filesize / 4))
cowsz=$((filesize / 2))
_weave_reflink_rainbow_delalloc $blksz $nr $testdir/file3 >> $seqres.full
# now cow
$XFS_IO_PROG -f -c "pwrite -S 0x63 -b $cowsz $cowoff $cowsz" $testdir/file3 >> $seqres.full
_pwrite_byte 0x63 $cowoff $cowsz $testdir/file3.chk >> $seqres.full
_scratch_cycle_mount
echo "Compare files"
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file3 | _filter_scratch
md5sum $testdir/file3.chk | _filter_scratch
echo "Check extent counts"
old_extents=$(_count_extents $testdir/file1)
new_extents=$(_count_extents $testdir/file3)
echo "old extents: $old_extents" >> $seqres.full
echo "new extents: $new_extents" >> $seqres.full
echo "maximum extents: $internal_blks" >> $seqres.full
test $((new_extents - (nr * 4 / 10))) -lt $((internal_blks / 2)) || echo "file3 badly fragmented"
# success, all done
status=0
exit