| #! /bin/bash |
| # FS QA Test No. 166 |
| # |
| # Test for races or FS corruption when DIO writing to a file that's also |
| # the source of a reflink operation. |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (c) 2015 Oracle, Inc. 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 7 15 |
| |
| _cleanup() |
| { |
| cd / |
| rm -rf $tmp.* $finished_file |
| wait |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| . ./common/reflink |
| |
| # real QA test starts here |
| _supported_os Linux |
| _require_scratch_reflink |
| _require_cp_reflink |
| _require_odirect |
| |
| echo "Format and mount" |
| _scratch_mkfs > $seqres.full 2>&1 |
| _scratch_mount >> $seqres.full 2>&1 |
| |
| testdir=$SCRATCH_MNT/test-$seq |
| finished_file=/tmp/finished |
| do_snapshot=/tmp/snapshot |
| rm -rf $finished_file |
| mkdir $testdir |
| |
| loops=1024 |
| nr_loops=$((loops - 1)) |
| blksz=65536 |
| |
| echo "Initialize file" |
| echo >> $seqres.full |
| _pwrite_byte 0x61 0 $((loops * blksz)) $testdir/file1 >> $seqres.full |
| _scratch_cycle_mount |
| |
| # Snapshot creator... |
| # |
| # We rate limit the snapshot creator to one snapshot per full file write. this |
| # limits the runtime on slow devices, whilst not substantially reducing the the |
| # number of snapshots taken on fast devices. |
| snappy() { |
| n=0 |
| while [ ! -e $finished_file ]; do |
| if [ ! -e $do_snapshot ]; then |
| sleep 0.01 |
| continue; |
| fi |
| out="$(_cp_reflink $testdir/file1 $testdir/snap_$n 2>&1)" |
| res=$? |
| echo "$out" | grep -q "No space left" && break |
| test -n "$out" && echo "$out" |
| test $res -ne 0 && break |
| n=$((n + 1)) |
| rm -f $do_snapshot |
| done |
| } |
| |
| echo "Snapshot a file undergoing directio rewrite" |
| snappy & |
| seq $nr_loops -1 0 | while read i; do |
| _pwrite_byte 0x63 $((i * blksz)) $blksz -d $testdir/file1 >> $seqres.full |
| touch $do_snapshot |
| done |
| touch $finished_file |
| wait |
| |
| # success, all done |
| status=0 |
| exit |