| #! /bin/bash |
| # FS QA Test No. 143 |
| # |
| # Ensure that reflinking a file N times and DIO CoWing the copies leaves the |
| # original intact. |
| # - Create a file and record its hash |
| # - Create some reflink copies |
| # - Rewrite all the reflink copies w/ directio |
| # - Compare the contents of the original file |
| # |
| #----------------------------------------------------------------------- |
| # 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 / |
| rm -rf $tmp.* $testdir |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| . ./common/reflink |
| |
| # real QA test starts here |
| _supported_os Linux |
| _require_test_reflink |
| _require_cp_reflink |
| _require_odirect |
| |
| rm -f $seqres.full |
| |
| testdir=$TEST_DIR/test-$seq |
| rm -rf $testdir |
| mkdir $testdir |
| |
| echo "Create the original file blocks" |
| blksz=65536 |
| nr=9 |
| filesize=$((blksz * nr)) |
| _pwrite_byte 0x61 0 $((blksz * 256)) $testdir/file1 >> $seqres.full |
| _test_cycle_mount |
| |
| md5sum $testdir/file1 | _filter_test_dir |
| csum=$(_md5_checksum $testdir/file1) |
| |
| echo "Create the reflink copies" |
| seq 2 $nr | while read i; do |
| _cp_reflink $testdir/file1 $testdir/file$i |
| done |
| _test_cycle_mount |
| |
| echo "Rewrite the copies" |
| seq 2 $nr | while read i; do |
| _pwrite_byte 0x62 0 $((blksz * 256)) $testdir/file$i -d >> $seqres.full |
| done |
| _test_cycle_mount |
| |
| echo "Examine original file" |
| md5sum $testdir/file1 | _filter_test_dir |
| md5sum $testdir/file2 | _filter_test_dir |
| |
| mod_csum=$(_md5_checksum $testdir/file2) |
| new_csum=$(_md5_checksum $testdir/file1) |
| test ${csum} != ${mod_csum} || echo "checksums do not match" |
| test ${csum} = ${new_csum} || echo "checksums do not match" |
| |
| # success, all done |
| status=0 |
| exit |