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#! /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
_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 1f2030ff6e49 \
"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
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