#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2022 Christoph Hellwig.
#
# FS QA Test btrfs/271
#
# Test btrfs write error propagation and reporting on the raid1 profile.
#
. ./common/preamble
_begin_fstest auto quick raid

. ./common/filter
. ./common/fail_make_request

_supported_fs btrfs
_require_scratch
_require_fail_make_request
_require_scratch_dev_pool 2
_scratch_dev_pool_get 2

_check_minimal_fs_size $(( 1024 * 1024 * 1024 ))
_scratch_pool_mkfs "-d raid1 -b 1G" >> $seqres.full 2>&1

_scratch_mount

dev2=`echo $SCRATCH_DEV_POOL | $AWK_PROG '{print $2}'`

pagesize=$(get_page_size)
blocksize=$(_get_block_size $SCRATCH_MNT)
sectors_per_page=$(($pagesize / $blocksize))

_allow_fail_make_request

echo "Step 1: writing with one failing mirror:"
_bdev_fail_make_request $SCRATCH_DEV 1
$XFS_IO_PROG -f -c "pwrite -W -S 0xaa 0 8K" $SCRATCH_MNT/foobar | _filter_xfs_io
_bdev_fail_make_request $SCRATCH_DEV 0

errs=$($BTRFS_UTIL_PROG device stats $SCRATCH_DEV | \
	$AWK_PROG '/write_io_errs/ { print $2 }')
if [ $errs -ne $((4 * $sectors_per_page)) ]; then
        _fail "Errors: $errs expected: 4"
fi

echo "Step 2: verify that the data reads back fine:"
$XFS_IO_PROG -c "pread -v 0 8K" $SCRATCH_MNT/foobar | _filter_xfs_io_offset

echo "Step 3: writing with two failing mirrors (should fail):"
_bdev_fail_make_request $SCRATCH_DEV 1
_bdev_fail_make_request $dev2 1
$XFS_IO_PROG -f -c "pwrite -W -S 0xbb 0 8K" $SCRATCH_MNT/foobar | _filter_xfs_io
_bdev_fail_make_request $dev2 0
_bdev_fail_make_request $SCRATCH_DEV 0

_disallow_fail_make_request

_scratch_dev_pool_put
# success, all done
status=0
exit