#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2021 SUSE Linux Products GmbH.  All Rights Reserved.
#
# FS QA Test 247
#
# Tests rename/exchange behavior when subvolumes are involved. Rename/exchanges
# across subvolumes are forbidden. This is also a regression test for
# 3f79f6f6247c ("btrfs: prevent rename2 from exchanging a subvol with a
# directory from different parents").
#
. ./common/preamble
_begin_fstest auto quick rename subvol

 . ./common/renameat2

_supported_fs btrfs
_require_renameat2 exchange
_require_scratch

_scratch_mkfs >> $seqres.full 2>&1
_scratch_mount

# Create 2 subvols to use as parents for the rename ops
$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol1 1>/dev/null
$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol2 1>/dev/null

# Ensure cross subvol ops are forbidden
_rename_tests_source_dest $SCRATCH_MNT/subvol1/src $SCRATCH_MNT/subvol2/dst "cross-subvol" "-x"

# Prepare a subvolume and a directory whose parents are different subvolumes
$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol1/sub-subvol 1>/dev/null
mkdir $SCRATCH_MNT/subvol2/dir

# Ensure exchanging a subvol with a dir when both parents are different fails
$here/src/renameat2 -x $SCRATCH_MNT/subvol1/sub-subvol $SCRATCH_MNT/subvol2/dir

echo "ordinary rename"
# Test also ordinary renames
_rename_tests_source_dest $SCRATCH_MNT/subvol1/src $SCRATCH_MNT/subvol2/dst "cross-subvol"

echo "subvolumes rename"
# Rename subvol1/sub-subvol -> subvol2/sub-subvol
$here/src/renameat2  $SCRATCH_MNT/subvol1/sub-subvol $SCRATCH_MNT/subvol2/sub-subvol
# Now create another subvol under subvol1/
$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol1/sub-subvol 1>/dev/null
# and exchange the two
$here/src/renameat2 -x $SCRATCH_MNT/subvol2/sub-subvol $SCRATCH_MNT/subvol1/sub-subvol

# simple rename of a subvolume in the same directory, should catch
# 4871c1588f92 ("Btrfs: use right root when checking for hash collision")
mv $SCRATCH_MNT/subvol2/ $SCRATCH_MNT/subvol2.

# success, all done
status=0
exit