| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (C) 2019 SUSE Linux Products GmbH. All Rights Reserved. |
| # |
| # FS QA Test No. 189 |
| # |
| # Test that an incremental send receive does not issue clone operations that |
| # attempt to clone the last block of a file, with a size not aligned to the |
| # filesystem's sector size, into the middle of some other file. Such clone |
| # request causes the receiver to fail (with EINVAL), for kernels that include |
| # commit ac765f83f1397646 ("Btrfs: fix data corruption due to cloning of eof |
| # block"), or cause silent data corruption for older kernels. |
| # |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| cd / |
| rm -f $tmp.* |
| rm -fr $send_files_dir |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| . ./common/reflink |
| |
| # real QA test starts here |
| _supported_fs btrfs |
| _require_fssum |
| _require_test |
| _require_scratch_reflink |
| |
| send_files_dir=$TEST_DIR/btrfs-test-$seq |
| |
| rm -f $seqres.full |
| rm -fr $send_files_dir |
| mkdir $send_files_dir |
| |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount |
| |
| $XFS_IO_PROG -f -c "pwrite -S 0xb1 0 2M" $SCRATCH_MNT/foo | _filter_xfs_io |
| $XFS_IO_PROG -f -c "pwrite -S 0xc7 0 2M" $SCRATCH_MNT/bar | _filter_xfs_io |
| $XFS_IO_PROG -f -c "pwrite -S 0x4d 0 2M" $SCRATCH_MNT/baz | _filter_xfs_io |
| $XFS_IO_PROG -f -c "pwrite -S 0xe2 0 2M" $SCRATCH_MNT/zoo | _filter_xfs_io |
| |
| $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/base 2>&1 \ |
| | _filter_scratch |
| |
| $BTRFS_UTIL_PROG send -f $send_files_dir/1.snap $SCRATCH_MNT/base 2>&1 \ |
| | _filter_scratch |
| |
| # Clone part of the extent from a higher offset to a lower offset of the same |
| # file. |
| $XFS_IO_PROG -c "reflink $SCRATCH_MNT/bar 1600K 640K 128K" $SCRATCH_MNT/bar \ |
| | _filter_xfs_io |
| |
| # Now clone from the previous file, same range, into the middle of another file, |
| # such that the end offset at the destination is smaller than the destination's |
| # file size. |
| $XFS_IO_PROG -c "reflink $SCRATCH_MNT/bar 1600K 0 128K" $SCRATCH_MNT/zoo \ |
| | _filter_xfs_io |
| |
| # Truncate the source file of the previous clone operation to a smaller size, |
| # which ends up in the middle of the range of previous clone operation from file |
| # bar to file bar. We want to check this doesn't confuse send to issue invalid |
| # clone operations. This smaller size must not be aligned to the sector size of |
| # the filesystem - the unaligned size is what can cause those invalid clone |
| # operations. |
| $XFS_IO_PROG -c "truncate 710K" $SCRATCH_MNT/bar |
| |
| $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/incr 2>&1 \ |
| | _filter_scratch |
| |
| $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/base -f $send_files_dir/2.snap \ |
| $SCRATCH_MNT/incr 2>&1 | _filter_scratch |
| |
| # Compute digests of the snapshot trees so that later we can compare against |
| # digests of the trees in the new filesystem, to see if they match (no data or |
| # metadata corruption happened). |
| $FSSUM_PROG -A -f -w $send_files_dir/base.fssum $SCRATCH_MNT/base |
| $FSSUM_PROG -A -f -w $send_files_dir/incr.fssum \ |
| -x $SCRATCH_MNT/incr/base $SCRATCH_MNT/incr |
| |
| # Now recreate the filesystem by receiving both send streams and verify we get |
| # the same file contents that the original filesystem had. |
| _scratch_unmount |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount |
| |
| $BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT |
| $BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT |
| |
| # Compute digests of the snapshot trees in the new filesystem and compare them |
| # to the ones in the original filesystem, they must match. |
| $FSSUM_PROG -r $send_files_dir/base.fssum $SCRATCH_MNT/base |
| $FSSUM_PROG -r $send_files_dir/incr.fssum $SCRATCH_MNT/incr |
| |
| status=0 |
| exit |