| #! /bin/bash |
| # FS QA Test No. btrfs/041 |
| # |
| # Test that btrfs-progs' restore command is able to correctly recover files |
| # that have compressed extents, specially when the respective file extent |
| # items have a non-zero data offset field. |
| # |
| # This issue is fixed by the following btrfs-progs patch: |
| # |
| # Btrfs-progs: fix restore of files with compressed extents |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (c) 2014 Filipe Manana. 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 |
| |
| restore_dir=$TEST_DIR/btrfs-test-$seq |
| |
| _cleanup() |
| { |
| rm -fr $tmp |
| rm -fr $restore_dir |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| # real QA test starts here |
| _supported_fs btrfs |
| _supported_os Linux |
| _require_test |
| _require_scratch |
| |
| rm -f $seqres.full |
| mkdir $restore_dir |
| |
| test_btrfs_restore() |
| { |
| if [ -z $1 ] |
| then |
| OPTIONS="" |
| else |
| OPTIONS="-o compress-force=$1" |
| fi |
| _scratch_mkfs >/dev/null 2>&1 |
| _scratch_mount $OPTIONS |
| |
| # Create first file extent item, then fsync to make sure the next write |
| # won't end up in the same file extent item, so that we have 2 distinct |
| # file extent items. |
| $XFS_IO_PROG -f -c "pwrite -S 0xff -b 100000 0 100000" -c "fsync" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io |
| |
| # This creates a second file extent item. |
| $XFS_IO_PROG -c "pwrite -S 0xaa -b 100000 100000 100000" -c "fsync" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io |
| |
| # Now do a few writes that will cause the first extent item to be split, |
| # with some of the new smaller file extent items getting a data offset |
| # field different from 0. |
| $XFS_IO_PROG -c "pwrite -S 0x1e -b 2 10000 2" $SCRATCH_MNT/foo \ |
| | _filter_xfs_io |
| $XFS_IO_PROG -c "pwrite -S 0xd0 -b 11 33000 11" $SCRATCH_MNT/foo \ |
| | _filter_xfs_io |
| $XFS_IO_PROG -c "pwrite -S 0xbc -b 100 99000 100" $SCRATCH_MNT/foo \ |
| | _filter_xfs_io |
| |
| md5sum $SCRATCH_MNT/foo | _filter_scratch |
| |
| _scratch_unmount |
| |
| rm -f $restore_dir/foo |
| # Now that the fs is unmounted, call btrfs restore to read the file |
| # from disk and save it in the test directory. It used to incorrectly |
| # read compressed file extents that have a non-zero data offset field, |
| # resulting either in decompression failure or reading a wrong section |
| # of the extent. |
| _run_btrfs_util_prog restore $SCRATCH_DEV $restore_dir |
| md5sum $restore_dir/foo | cut -d ' ' -f 1 |
| } |
| |
| echo "Testing restore of file compressed with lzo" |
| test_btrfs_restore "lzo" |
| echo "Testing restore of file compressed with zlib" |
| test_btrfs_restore "zlib" |
| echo "Testing restore of file without any compression" |
| test_btrfs_restore |
| |
| status=0 |
| exit |