| #!/bin/bash |
| # FS QA Test No. 415 |
| # |
| # test for races between write or fpunch operations on reflinked files |
| # to read operations on the target file |
| # |
| #----------------------------------------------------------------------- |
| # |
| # Copyright (c) 2017 Plexistor Ltd. 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=0 # success is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| cd / |
| rm -f $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/reflink |
| |
| # remove previous $seqres.full before test |
| rm -f $seqres.full |
| |
| # real QA test starts here |
| _supported_fs generic |
| _supported_os Linux |
| _require_scratch_reflink |
| _require_cp_reflink |
| |
| _scratch_mkfs >> $seqres.full 2>&1 || _fail "mkfs failed" |
| _scratch_mount || _fail "mount failed" |
| _require_fs_space $SCRATCH_MNT $((250 * 1024)) |
| |
| echo "Silence is golden" |
| |
| workfile=${SCRATCH_MNT}/workfile |
| light_clone=${SCRATCH_MNT}/light_clone |
| |
| file_size=$((10 * 1024 * 1024)) |
| bs=`_get_block_size $SCRATCH_MNT` |
| block_num=$((file_size / bs)) |
| reflinks_num=20 |
| |
| $XFS_IO_PROG -f -c "pwrite 0 $file_size" $workfile >> $seqres.full |
| |
| for ((i=1; i<=reflinks_num; i++)); do |
| _cp_reflink $workfile ${light_clone}_$i |
| done |
| |
| # for each block simultaneously pwrite (or fpunch) all reflinks |
| # while performing pread from the targted file |
| for ((block_index=0; block_index<block_num; block_index++)); do |
| for ((i=1; i<=reflinks_num; i++)); do |
| $XFS_IO_PROG -c "pread $((block_index * bs)) $bs" \ |
| $workfile >> $seqres.full & |
| if [ $((block_index % 2)) -eq 0 ]; then |
| $XFS_IO_PROG -c "pwrite $((block_index * bs)) $bs" \ |
| ${light_clone}_$i >> $seqres.full & |
| else |
| $XFS_IO_PROG -c "fpunch $((block_index * bs)) $bs" \ |
| ${light_clone}_$i >> $seqres.full & |
| fi |
| done |
| # wait for all threads to join before moving to next block |
| wait |
| done |
| |
| # success, all done |
| status=0 |
| exit |