#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2023 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test No. 296
#
# Make sure that per-fs features sysfs interface get properly updated
# when a new feature is added.
#
. ./common/preamble
_begin_fstest auto quick balance

_supported_fs btrfs
_require_scratch_dev_pool 3
_fixed_by_kernel_commit b7625f461da6 \
	"btrfs: sysfs: update fs features directory asynchronously"

# We need the global features support
_require_btrfs_fs_sysfs

global_features="/sys/fs/btrfs/features"
# Make sure we have support RAID1C34 first
if [ ! -f "${global_features}/raid1c34" ]; then
	_notrun "no RAID1C34 support"
fi

_scratch_dev_pool_get 3

# Go the very basic profile first, so that even older progs can support it.
_scratch_pool_mkfs -m dup -d single >> $seqres.full 2>&1

_scratch_mount
uuid="$(findmnt -n -o UUID "$SCRATCH_MNT")"
per_fs_features="/sys/fs/btrfs/${uuid}/features"

# First we need per-fs features directory
if [ ! -d "${per_fs_features}" ]; then
	_notrun "no per-fs features sysfs directory"
fi

# Make sure the per-fs features doesn't include raid1c34
if [ -f "${per_fs_features}/raid1c34" ]; then
	_fail "raid1c34 feature found unexpectedly"
fi

# Balance to RAID1C3
$BTRFS_UTIL_PROG balance start -mconvert=raid1c3 "$SCRATCH_MNT" >> $seqres.full

# Sync before checking for sysfs update during cleaner_kthread().
sync

# Check if the per-fs features directory contains raid1c34 now
# Make sure the per-fs features doesn't include raid1c34
if [ ! -f "${per_fs_features}/raid1c34" ]; then
	_fail "raid1c34 feature not found"
fi

echo "Silence is golden"

_scratch_unmount
_scratch_dev_pool_put

# success, all done
status=0
exit