tests/btrfs/289

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2023 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test 289
#
# Make sure btrfs-scrub reports errors correctly for repaired sectors.
#
. ./common/preamble
_begin_fstest auto quick scrub repair

. ./common/filter

_require_scratch
# No data checksums for NOCOW case, so can't detect corruption and repair data.
_require_btrfs_no_nodatacow

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

# The errors reported would be in the unit of sector, thus the number
# is dependent on the sectorsize.
_require_btrfs_support_sectorsize 4096

_fixed_by_kernel_commit 79b8ee702c91 \
	"btrfs: scrub: also report errors hit during the initial read"

# Create a single btrfs with DUP data profile, and create one 128K file.
_scratch_mkfs -s 4k -d dup -b 1G >> $seqres.full 2>&1
_scratch_mount
$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" "$SCRATCH_MNT/foobar" \
	> /dev/null
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 128K" $devpath1 \
	>> $seqres.full

# Mount and do a scrub and compare the output
_scratch_mount
$BTRFS_UTIL_PROG scrub start -BR $SCRATCH_MNT >> $tmp.scrub_report 2>&1
cat $tmp.scrub_report >> $seqres.full

# Csum errors should be 128K/4K = 32
csum_errors=$(grep "csum_errors" $tmp.scrub_report | $AWK_PROG '{print $2}')
if [ $csum_errors -ne 32 ]; then
	echo "csum_errors incorrect, expect 32 has $csum_errors"
fi

# And all errors should be repaired, thus corrected errors should also be 32.
corrected_errors=$(grep "corrected_errors" $tmp.scrub_report | $AWK_PROG '{print $2}')
if [ $corrected_errors -ne 32 ]; then
	echo "corrected_errors incorrect, expect 32 has $corrected_errors"
fi

echo "Silence is golden"

status=0
exit