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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014, Oracle and/or its affiliates. All Rights Reserved.
#
# FS QA Test No. 031
#
# Testing cross-subvolume sparse copy on btrfs
# - Create two subvolumes, mount one of them
# - Create a file on each (sub/root)volume,
# reflink them on the other volumes
# - Change one original and two reflinked files
# - Move reflinked files between subvolumes
#
. ./common/preamble
_begin_fstest auto quick subvol clone
. ./common/filter
. ./common/reflink
_supported_fs btrfs
_require_test
_require_scratch
_require_cp_reflink
_checksum_files()
{
for f in file1 file2 file3; do
echo "$f:"
for d in $testdir1 $cross_mount_test_dir $subvol2; do
_md5_checksum $d/$f
done
done
}
testdir1=$SCRATCH_MNT/test-$seq-1
testdir2=$SCRATCH_MNT/test-$seq-2
subvol1=$SCRATCH_MNT/subvol-$seq-1
subvol2=$SCRATCH_MNT/subvol-$seq-2
cross_mount_test_dir=$TEST_DIR/test-$seq
_scratch_mkfs > /dev/null 2>&1
_scratch_mount
mkdir $testdir1
mkdir $testdir2
$BTRFS_UTIL_PROG subvolume create $subvol1 >> $seqres.full
$BTRFS_UTIL_PROG subvolume create $subvol2 >> $seqres.full
rm -rf $cross_mount_test_dir
mkdir $cross_mount_test_dir
_mount -t btrfs -o subvol=subvol-$seq-1 $SCRATCH_DEV $cross_mount_test_dir
echo "Create initial files"
# #testdir1/file1 is very small and will be inlined
$XFS_IO_PROG -f -c 'pwrite -S 0x61 0 10' $testdir1/file1 \
>> $seqres.full
$XFS_IO_PROG -f -c 'pwrite -S 0x62 0 13000' $cross_mount_test_dir/file2 \
>> $seqres.full
$XFS_IO_PROG -f -c 'pwrite -S 0x63 0 17000' $subvol2/file3 \
>> $seqres.full
echo "Create reflinks to the initial files on other subvolumes"
cp --reflink=always $testdir1/file1 $subvol1
cp --reflink=always $testdir1/file1 $subvol2
cp --reflink=always $subvol1/file2 $testdir1/
cp --reflink=always $subvol1/file2 $subvol2
cp --reflink=always $subvol2/file3 $testdir1/
cp --reflink=always $subvol2/file3 $subvol1
echo "Verify the reflinks"
_verify_reflink $cross_mount_test_dir/file2 $testdir1/file2
_verify_reflink $cross_mount_test_dir/file2 $subvol2/file2
_verify_reflink $subvol2/file3 $testdir1/file3
_verify_reflink $subvol2/file3 $cross_mount_test_dir/file3
echo "Verify the file contents:"
_checksum_files
echo -e "---\nOverwrite some files with new content"
$XFS_IO_PROG -c 'pwrite -S 0x64 0 20' $testdir1/file1 >> $seqres.full
$XFS_IO_PROG -c 'pwrite -S 0x66 0 21000' $subvol2/file2 >> $seqres.full
$XFS_IO_PROG -c 'pwrite -S 0x65 5000 5000' $cross_mount_test_dir/file3 \
>> $seqres.full
echo -n "Verify that non-overwritten reflinks "
echo "still have the same data blocks"
_verify_reflink $testdir1/file2 $cross_mount_test_dir/file2
_verify_reflink $testdir1/file3 $subvol2/file3
echo "Verify the file contents:"
_checksum_files
echo -e "---\nShuffle files between directories"
mv $testdir1/file* $testdir2
mv $cross_mount_test_dir/file* $testdir1/
mv $subvol2/file* $cross_mount_test_dir/
mv $testdir2/file* $subvol2/
# No _verify_reflink here as data is copied when moving files
# between subvols
echo "Verify the file contents:"
_checksum_files
$UMOUNT_PROG $cross_mount_test_dir
# success, all done
status=0
exit
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