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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test No. btrfs/110
#
# Test that sending and receiving snapshots across different filesystems works
# for full and incremental send operations.
#
. ./common/preamble
_begin_fstest auto quick send
# Override the default cleanup function.
_cleanup()
{
cd /
rm -fr $send_files_dir
rm -f $tmp.*
}
. ./common/filter
_supported_fs btrfs
_require_scratch
send_files_dir=$TEST_DIR/btrfs-test-$seq
rm -fr $send_files_dir
mkdir $send_files_dir
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount
# Create a test file
$XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 32K" $SCRATCH_MNT/foo | _filter_xfs_io
# Create the first snapshot.
_btrfs subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/snap1
echo "File digest in the first filesystem, first snapshot:"
md5sum $SCRATCH_MNT/snap1/foo | _filter_scratch
# Save send stream for this snapshot.
_btrfs send -f $send_files_dir/1.snap $SCRATCH_MNT/snap1
# Create a new filesystem and receive the snapshot.
_scratch_unmount
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount
_btrfs receive -f $send_files_dir/1.snap $SCRATCH_MNT
echo "File digest in the second filesystem, first snapshot:"
# Must match the digest we got in the first filesystem.
md5sum $SCRATCH_MNT/snap1/foo | _filter_scratch
# Snapshot the first snapshot as rw, modify this new snapshot and then snapshot
# it as RO to use in a send operation (send requires RO snapshots).
_btrfs subvolume snapshot $SCRATCH_MNT/snap1 $SCRATCH_MNT/snap2_rw
$XFS_IO_PROG -c "pwrite -S 0xbb 4K 4K" \
$SCRATCH_MNT/snap2_rw/foo | _filter_xfs_io
_btrfs subvolume snapshot -r $SCRATCH_MNT/snap2_rw \
$SCRATCH_MNT/snap2
echo "File digest in the second filesystem, second snapshot:"
md5sum $SCRATCH_MNT/snap2/foo | _filter_scratch
_btrfs send -p $SCRATCH_MNT/snap1 -f $send_files_dir/2.snap \
$SCRATCH_MNT/snap2
# Create a new filesystem and receive both the first snapshot, through the first
# send stream we created, and the second snapshot through the incremental send
# stream we just created. Verify this works and the file data is correct in both
# snapshots.
_scratch_unmount
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount
_btrfs receive -f $send_files_dir/1.snap $SCRATCH_MNT
# Receiving the second snapshot used to fail because the send stream used an
# incorrect value for the clone sources uuid field - it used the uuid of
# snapshot 1, which is different on each filesystem, instead of the received
# uuid value, which is preserved across different filesystems.
_btrfs receive -f $send_files_dir/2.snap $SCRATCH_MNT
echo "File digests in the third filesystem:"
# Must match the digests we got in the previous filesystems.
md5sum $SCRATCH_MNT/snap1/foo | _filter_scratch
md5sum $SCRATCH_MNT/snap2/foo | _filter_scratch
status=0
exit
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