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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2022 Christoph Hellwig.
#
# FS QA Test 269
#
# Test btrfs read repair over tricky stripe boundaries on the raid10 profile:
#
# | stripe 0 | stripe 2
# --------------------------------
# mirror 1 | I/O FAIL | GOOD
# mirror 2 | GOOD | CSUM FAIL
#
. ./common/preamble
_begin_fstest auto quick read_repair
. ./common/filter
_supported_fs btrfs
_require_scratch
_require_odirect
# No data checksums for NOCOW case, so can't detect corruption and repair data.
_require_btrfs_no_nodatacow
_require_non_zoned_device "${SCRATCH_DEV}" # no overwrites on zoned devices
_require_scratch_dev_pool 4
_scratch_dev_pool_get 4
echo "step 1......mkfs.btrfs"
_scratch_pool_mkfs "-d raid10 -b 1G" >>$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_offset
# 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 ${logical} 1)
physical4=$(_btrfs_get_physical ${logical} 3)
devpath4=$(_btrfs_get_device_path ${logical} 3)
_scratch_unmount
echo "step 2......corrupt file extent"
$XFS_IO_PROG -d -c "pwrite -S 0xbd -b 64K $physical1 64K" \
$devpath1 > /dev/null
$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $((physical4 + 65536)) 64K" \
$devpath4 > /dev/null
_scratch_mount
echo "step 3......repair the bad copy"
_btrfs_direct_read_on_mirror 0 2 "$SCRATCH_MNT/foobar" 0 128K
_btrfs_direct_read_on_mirror 1 2 "$SCRATCH_MNT/foobar" 0 128K
_scratch_unmount
echo "step 4......check if the repair worked"
$XFS_IO_PROG -d -c "pread -v -b 512 $physical1 512" $devpath1 |\
_filter_xfs_io_offset
$XFS_IO_PROG -d -c "pread -v -b 512 $((physical4 + 65536)) 512" $devpath4 |\
_filter_xfs_io_offset
_scratch_dev_pool_put
# success, all done
status=0
exit
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