tests/btrfs/027

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Facebook.  All Rights Reserved.
#
# FS QA Test 027
#
# Test replace of a missing device on various data and metadata profiles.
#
. ./common/preamble
_begin_fstest auto replace volume scrub

. ./common/filter

# we check scratch dev after each loop
_require_scratch_nocheck
_require_scratch_dev_pool 5
_require_scratch_dev_pool_equal_size
_btrfs_get_profile_configs replace-missing
_require_command "$WIPEFS_PROG" wipefs

run_test()
{
	local mkfs_opts=$1
	local ndevs=`echo $SCRATCH_DEV_POOL | wc -w`

	# reserve one for replace target
	((ndevs--))

	_scratch_dev_pool_get $ndevs
	_spare_dev_get

	echo "Test $mkfs_opts" >>$seqres.full

	_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
	# make sure we created btrfs with desired options
	if [ $? -ne 0 ]; then
		echo "mkfs $mkfs_opts failed"
		_spare_dev_put
		_scratch_dev_pool_put
		return
	fi
	_scratch_mount >>$seqres.full 2>&1

	local missing_dev=`echo $SCRATCH_DEV_POOL | $AWK_PROG '{print $2}'`
	local missing_dev_id=`$BTRFS_UTIL_PROG filesystem show $SCRATCH_MNT | grep $missing_dev | $AWK_PROG '{print $2}'`

	# get some data on the filesystem so there's something to replace
	_ddt of="$SCRATCH_MNT"/file1 bs=1M count=1 >> $seqres.full 2>&1
	_ddt of="$SCRATCH_MNT"/file2 bs=1M count=2 >> $seqres.full 2>&1
	_ddt of="$SCRATCH_MNT"/file3 bs=1M count=4 >> $seqres.full 2>&1

	# nuke a device and remount in degraded mode
	_scratch_unmount
	$WIPEFS_PROG -a "$missing_dev" >>$seqres.full 2>&1
	_scratch_mount -o degraded >>$seqres.full 2>&1

	# replace $missing_dev with $replace_dev and scrub it to double-check
	$BTRFS_UTIL_PROG replace start -B -f -r $missing_dev_id $SPARE_DEV \
		$SCRATCH_MNT >>$seqres.full 2>&1
	if [ $? -ne 0 ]; then
		echo "btrfs replace failed"
		_scratch_unmount
		_spare_dev_put
		_scratch_dev_pool_put
		return
	fi
	$BTRFS_UTIL_PROG scrub start -B $SCRATCH_MNT >>$seqres.full 2>&1
	if [ $? -ne 0 ]; then
		echo "btrfs scrub failed"
		_scratch_unmount
		_spare_dev_put
		_scratch_dev_pool_put
		return
	fi

	_scratch_unmount
	# we called _require_scratch_nocheck instead of _require_scratch
	# do check after test for each profile config
	_check_scratch_fs
	_spare_dev_put
	_scratch_dev_pool_put
}

echo "Silence is golden"
for t in "${_btrfs_profile_configs[@]}"; do
	run_test "$t"
done

status=0
exit