#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2023 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test 288
#
# Make sure btrfs-scrub respects the read-only flag.
#
. ./common/preamble
_begin_fstest auto repair quick volume scrub

. ./common/filter

# real QA test starts here

# Modify as appropriate.
_supported_fs btrfs
_require_scratch_dev_pool 2


_require_odirect
# Overwriting data is forbidden on a zoned block device
_require_non_zoned_device "${SCRATCH_DEV}"

_fixed_by_kernel_commit xxxxxxxxxxxx \
	"btrfs: scrub: respect the read-only flag during repair"

_scratch_dev_pool_get 2

# Step 1, create a raid btrfs with one 128K file
echo "step 1......mkfs.btrfs"
_scratch_pool_mkfs -d raid1 -b 1G >> $seqres.full 2>&1
_scratch_mount

$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" |\
	_filter_xfs_io

# Step 2, corrupt one mirror so we can still repair the fs.
echo "step 2......corrupt one mirror"
# ensure btrfs-map-logical sees the tree updates
sync

logical=$(_btrfs_get_first_logical $SCRATCH_MNT/foobar)

physical1=$(_btrfs_get_physical ${logical} 1)
devpath1=$(_btrfs_get_device_path ${logical} 1)

_scratch_unmount

echo " corrupt stripe #1, devpath $devpath1 physical $physical1" \
	>> $seqres.full
$XFS_IO_PROG -d -c "pwrite -S 0xf1 -b 64K $physical1 64K" $devpath1 \
	> /dev/null

# Step 3, do a read-only scrub, which should not fix the corruption.
echo "step 3......do a read-only scrub"
_scratch_mount -o ro
$BTRFS_UTIL_PROG scrub start -BRrd $SCRATCH_MNT >> $seqres.full 2>&1
_scratch_unmount

# Step 4, make sure the corruption is still there
echo "step 4......verify the corruption is not repaired"
echo "  the first 16 bytes of the extent at mirror 1:"
$XFS_IO_PROG -c "pread -qv $physical1 16" $devpath1 |\
	_filter_xfs_io_offset

_scratch_dev_pool_put
# success, all done
status=0
exit