mirror of
https://github.com/linux-apfs/apfstests.git
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Theodore Ts'o
56ff01f471
The check script requires that it be run as root, so adding individualized checks for this in each teat is not needed. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
103 lines
3.2 KiB
Bash
Executable File
103 lines
3.2 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. btrfs/108
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#
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# Test that a send operation works correctly with reflinked files (cloned
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# extents which multiple files point to).
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#
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#-----------------------------------------------------------------------
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# Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
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# Author: Filipe Manana <fdmanana@suse.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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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 $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/reflink
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch
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_require_cp_reflink
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_require_xfs_io_command "fpunch"
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send_files_dir=$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 test file with a single 100K extent.
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$XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 100K" $SCRATCH_MNT/foo | _filter_xfs_io
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# Clone our file into a new file named bar.
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cp --reflink=always $SCRATCH_MNT/foo $SCRATCH_MNT/bar
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# Now overwrite parts of our foo file.
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$XFS_IO_PROG -c "pwrite -S 0xbb 50K 10K" \
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-c "pwrite -S 0xcc 90K 10K" \
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-c "fpunch 70K 10k" \
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$SCRATCH_MNT/foo | _filter_xfs_io
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_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/snap
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echo "File digests in the original filesystem:"
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md5sum $SCRATCH_MNT/snap/foo | _filter_scratch
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md5sum $SCRATCH_MNT/snap/bar | _filter_scratch
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_run_btrfs_util_prog send $SCRATCH_MNT/snap -f $send_files_dir/1.snap
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# Now recreate the filesystem by receiving the send stream and verify we get
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# the same file contents that the original filesystem had.
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_scratch_unmount
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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_run_btrfs_util_prog receive $SCRATCH_MNT -f $send_files_dir/1.snap
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# We expect the destination filesystem to have exactly the same file data as
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# the original filesystem.
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# The btrfs send implementation had a bug where it sent a clone operation from
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# file foo into file bar covering the whole [0, 100K[ range after creating
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# and writing the file foo. This was incorrect because the file bar now included
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# the updates done to file foo after we cloned foo to bar, breaking the COW
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# nature of reflink copies (cloned extents).
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echo "File digests in the new filesystem:"
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md5sum $SCRATCH_MNT/snap/foo | _filter_scratch
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md5sum $SCRATCH_MNT/snap/bar | _filter_scratch
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status=0
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exit
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