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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Filipe Manana. All Rights Reserved.
#
# FS QA Test No. btrfs/054
#
# Regression test for a btrfs incremental send issue where the difference
# between the snapshots used by the incremental send consists of one of
# these cases:
#
# 1) First snapshot has a directory with name X and in the second snapshot
# that directory doesn't exist anymore but a subvolume/snapshot with
# the same name (X) exists;
#
# 2) First snapshot has a subvolume/snapshot with name X and in the second
# snapshot that subvolume/snapshot doesn't exist anymore (might have been
# replaced by a directory with the same name or not).
#
# This issue is fixed by the following linux kernel btrfs patches:
#
# Btrfs: send, don't error in the presence of subvols/snapshots
# Btrfs: set dead flag on the right root when destroying snapshot
#
. ./common/preamble
_begin_fstest auto quick send
# Override the default cleanup function.
_cleanup()
{
rm -fr $send_files_dir
rm -fr $tmp
}
. ./common/filter
. ./common/attr
_supported_fs btrfs
_require_test
_require_scratch
send_files_dir=$TEST_DIR/btrfs-test-$seq
rm -fr $send_files_dir
mkdir $send_files_dir
_scratch_mkfs >/dev/null 2>&1
_scratch_mount
mkdir $SCRATCH_MNT/testdir
_btrfs subvolume create $SCRATCH_MNT/first_subvol
_btrfs subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
# Replace the directory testdir with a subvolume that has the same name.
rmdir $SCRATCH_MNT/testdir
_btrfs subvolume create $SCRATCH_MNT/testdir
# Delete the subvolume first_subvol and create a directory with the same name.
_btrfs subvolume delete $SCRATCH_MNT/first_subvol
mkdir $SCRATCH_MNT/first_subvol
_btrfs subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2
_btrfs send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1
_btrfs send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
$SCRATCH_MNT/mysnap2
_scratch_unmount
_check_scratch_fs
_scratch_mkfs >/dev/null 2>&1
_scratch_mount
_btrfs receive -f $send_files_dir/1.snap $SCRATCH_MNT
[ -e $SCRATCH_MNT/first_subvol ] && \
echo "Subvolume first_subvol was not supposed to be replicated by full send!"
_btrfs receive -f $send_files_dir/2.snap $SCRATCH_MNT
[ -e $SCRATCH_MNT/testdir ] && \
echo "Directory testdir was supposed to be deleted after incremental send!"
status=0
exit
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