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Filipe Manana
901c4e5d19
Test that an incremental send operation works after deduplicating into the same file in both the parent and send snapshots. This currently fails on btrfs and a kernel patch to fix it was submitted with the subject: Btrfs: fix incremental send failure after deduplication Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
111 lines
3.6 KiB
Bash
Executable File
111 lines
3.6 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. btrfs/191
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#
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# Test that an incremental send operation works after deduplicating into the
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# same file in both the parent and send snapshots.
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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 -fr $send_files_dir
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/reflink
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_test
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_require_scratch_dedupe
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_require_fssum
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send_files_dir=$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 $send_files_dir
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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# Create our first file. The first half of the file has several 64Kb extents
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# while the second half as a single 512Kb extent.
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$XFS_IO_PROG -f -s -c "pwrite -S 0xb8 -b 64K 0 512K" $SCRATCH_MNT/foo \
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| _filter_xfs_io
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$XFS_IO_PROG -c "pwrite -S 0xb8 512K 512K" $SCRATCH_MNT/foo | _filter_xfs_io
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# Create the base snapshot and the parent send stream from it.
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1 \
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| _filter_scratch
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$BTRFS_UTIL_PROG send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1 2>&1 \
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| _filter_scratch
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# Create our second file, that has exactly the same data as the first file.
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$XFS_IO_PROG -f -c "pwrite -S 0xb8 0 1M" $SCRATCH_MNT/bar | _filter_xfs_io
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# Create the second snapshot, used for the incremental send, before doing the
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# file deduplication.
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2 \
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| _filter_scratch
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# Now before creating the incremental send stream:
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#
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# 1) Deduplicate into a subrange of file foo in snapshot mysnap1. This will drop
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# several extent items and add a new one, also updating the inode's iversion
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# (sequence field in inode item) by 1, but not any other field of the inode;
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#
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# 2) Deduplicate into a different subrange of file foo in snapshot mysnap2. This
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# will replace an extent item with a new one, also updating the inode's
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# iversion by 1 but not any other field of the inode.
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#
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# After these two deduplication operations, the inode items, for file foo, are
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# identical in both snapshots, but we have different extent items for this inode
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# in both snapshots. We want to check this doesn't cause send to fail with an
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# error or produce an incorrect stream.
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$XFS_IO_PROG -r -c "dedupe $SCRATCH_MNT/bar 0 0 512K" $SCRATCH_MNT/mysnap1/foo \
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| _filter_xfs_io
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$XFS_IO_PROG -r -c "dedupe $SCRATCH_MNT/bar 512K 512K 512K" \
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$SCRATCH_MNT/mysnap2/foo | _filter_xfs_io
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# Create the incremental send stream.
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$BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
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$SCRATCH_MNT/mysnap2 2>&1 | _filter_scratch
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# Create the checksums to verify later that the send streams produce correct
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# results.
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$FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
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$FSSUM_PROG -A -f -w $send_files_dir/2.fssum \
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-x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2
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# Now recreate the filesystem by receiving both send streams and verify we get
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# the same content that the original filesystem had.
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_scratch_unmount
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_scratch_mkfs >>$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 $SCRATCH_MNT
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$FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
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$FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2
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status=0
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exit
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