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Filipe Manana
c37f9a66df
Test that an incremental send with not corrupt data when the source filesystem has the no-holes feature enabled, a file has prealloc (unwritten) extents that start after its size and hole is punched (after the first snapshot is made) that removes all extents from some offset up to the file's size. This currently fails on any kernel version starting from 3.16, and it's by a patch titled: "Btrfs: incremental send, fix file corruption when no-holes feature is enabled" Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
85 lines
2.4 KiB
Bash
Executable File
85 lines
2.4 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2019 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test No. 188
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#
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# Test that an incremental send with not corrupt data when the source filesystem
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# has the no-holes feature enabled, a file has prealloc (unwritten) extents that
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# start after its size and hole is punched (after the first snapshot is made)
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# that removes all extents from some offset up to the file's size.
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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rm -fr $send_files_dir
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_test
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_require_scratch
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_require_btrfs_fs_feature "no_holes"
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_require_btrfs_mkfs_feature "no-holes"
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_require_xfs_io_command "fpunch"
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_require_xfs_io_command "falloc" "-k"
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send_files_dir=$TEST_DIR/btrfs-test-$seq
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rm -f $seqres.full
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rm -fr $send_files_dir
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mkdir $send_files_dir
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_scratch_mkfs "-O no-holes" >>$seqres.full 2>&1
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_scratch_mount
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# Create our test file with a prealloc extent that starts beyond its size.
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$XFS_IO_PROG -f -c "pwrite -S 0xab 0 500K" $SCRATCH_MNT/foobar | _filter_xfs_io
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$XFS_IO_PROG -c "falloc -k 1200K 800K" $SCRATCH_MNT/foobar
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/base 2>&1 \
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| _filter_scratch
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$BTRFS_UTIL_PROG send -f $send_files_dir/1.snap $SCRATCH_MNT/base 2>&1 \
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| _filter_scratch
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# Now punch a hole that drops all the extents within the file's size.
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$XFS_IO_PROG -c "fpunch 0 500K" $SCRATCH_MNT/foobar
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/incr 2>&1 \
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| _filter_scratch
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$BTRFS_UTIL_PROG send -p $SCRATCH_MNT/base -f $send_files_dir/2.snap \
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$SCRATCH_MNT/incr 2>&1 | _filter_scratch
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echo "File digest in the original filesystem:"
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md5sum $SCRATCH_MNT/incr/foobar | _filter_scratch
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# Now recreate the filesystem by receiving both send streams and verify we get
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# the same file content that the original filesystem had.
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_scratch_unmount
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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$BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT
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$BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT
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echo "File digest in the new filesystem:"
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md5sum $SCRATCH_MNT/incr/foobar | _filter_scratch
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status=0
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exit
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