#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2023 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test No. 295
#
# Make sure btrfs handles critical errors gracefully during mount.
#
. ./common/preamble
_begin_fstest auto quick dangerous

. ./common/filter
_supported_fs btrfs
_require_scratch
# Directly writing to the device, which may not work with a zoned device
_require_non_zoned_device "$SCRATCH_DEV"

# Use single metadata profile so we only need to corrupt one copy of tree block
_scratch_mkfs -m single > $seqres.full

logical_root=$($BTRFS_UTIL_PROG inspect dump-tree -t root "$SCRATCH_DEV" | \
	       grep leaf | head -n1 | cut -f2 -d\ )
physical_root=$(_btrfs_get_physical $logical_root 1)

echo "tree root logical=$logical_root" >> $seqres.full
echo "tree root physical=$physical_root" >> $seqres.full

_pwrite_byte 0x00 "$physical_root" 4 $SCRATCH_DEV >> $seqres.full

# mount may lead to crash
_try_scratch_mount >> $seqres.full 2>&1

echo "Silence is golden"

# Re-create the fs to avoid false alert from the corrupted fs.
_scratch_mkfs -m single >> $seqres.full

# success, all done
status=0
exit