#! /bin/bash
# FS QA Test No. 265
#
# btrfs vol tests
#
#-----------------------------------------------------------------------
# Copyright (c) 2011 Oracle.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#-----------------------------------------------------------------------
#
# creator
owner=anand.jain@oracle.com

seq=`basename $0`
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!
dev_removed=0
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
    cd /
    rm -f $tmp.*
    if [ $dev_removed == 1 ]; then
        umount $SCRATCH_MNT
        _devmgt_add "${DEVHTL}"
    fi
}

# get standard environment, filters and checks
. ./common.rc
. ./common.filter

_need_to_be_root
_supported_fs btrfs
_supported_os Linux
_require_scratch
_require_scratch_dev_pool
_require_deletable_scratch_dev_pool

# Test cases related to raid in btrfs
_test_raid0()
{
	export MKFS_OPTIONS="-m raid0 -d raid0"
	_scratch_mkfs $SCRATCH_DEV_POOL > /dev/null 2>&1 || _fail "mkfs failed"
	_scratch_mount
	dirp=`mktemp -duq $SCRATCH_MNT/dir.XXXXXX`
	_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10
	umount $SCRATCH_MNT
}

_test_raid1()
{
	export MKFS_OPTIONS="-m raid1 -d raid1"
	_scratch_mkfs $SCRATCH_DEV_POOL > /dev/null 2>&1 || _fail "mkfs failed"
	_scratch_mount
	dirp=`mktemp -duq $SCRATCH_MNT/dir.XXXXXX`
	_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10
	umount $SCRATCH_MNT
}

_test_raid10()
{
	export MKFS_OPTIONS="-m raid10 -d raid10"
	_scratch_mkfs $SCRATCH_DEV_POOL > /dev/null 2>&1 || _fail "mkfs failed"
	_scratch_mount
	dirp=`mktemp -duq $SCRATCH_MNT/dir.XXXXXX`
	_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10
	umount $SCRATCH_MNT
}

_test_single()
{
	export MKFS_OPTIONS="-m single -d single"
	_scratch_mkfs $SCRATCH_DEV_POOL > /dev/null 2>&1 || _fail "mkfs failed"
	_scratch_mount
	dirp=`mktemp -duq $SCRATCH_MNT/dir.XXXXXX`
	_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10
	umount $SCRATCH_MNT
}

_test_add()
{
	local i
	local devs[]="( $SCRATCH_DEV_POOL )"
	local n=${#devs[@]}

	n=$(($n-1))

	export MKFS_OPTIONS=""
	_scratch_mkfs > /dev/null 2>&1 || _fail "mkfs failed"
	_scratch_mount
	dirp=`mktemp -duq $SCRATCH_MNT/dir.XXXXXX`
	_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10
	for i in `seq 1 $n`; do
		btrfs device add ${devs[$i]} $SCRATCH_MNT > /dev/null 2>&1 || _fail "device add failed"
	done
	btrfs filesystem balance $SCRATCH_MNT || _fail "balance failed"
	umount $SCRATCH_MNT
}

_test_replace()
{
	local i
	local devs=( $SCRATCH_DEV_POOL )
	local n=${#devs[@]}
	local ds
	local d
	local DEVHTL=""

	# exclude the last disk in the disk pool
	n=$(($n-1))
	ds=${devs[@]:0:$n}

	export MKFS_OPTIONS="-m raid1 -d raid1"
	_scratch_mkfs "$ds" > /dev/null 2>&1 || _fail "tr: mkfs failed"
	_scratch_mount
	dirp=`mktemp -duq $SCRATCH_MNT/dir.XXXXXX`
	_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10

	#pick the 2nd last disk 
	ds=${devs[@]:$(($n-1)):1}

	# retrive the HTL for this scsi disk
	d=`echo $ds|cut -d"/" -f3`
	DEVHTL=`ls -l /sys/class/block/${d} | rev | cut -d "/" -f 3 | rev`

	#fail disk
	_devmgt_remove ${DEVHTL}
	dev_removed=1

	btrfs fi show $SCRATCH_DEV | grep "Some devices missing" > /dev/null || _fail \
							"btrfs did not report device missing"

	# add a new disk to btrfs
	ds=${devs[@]:$(($n)):1}
	btrfs device add ${ds} $SCRATCH_MNT > /dev/null 2>&1 || _fail "dev add failed"
	# in some system balance fails if there is no delay (a bug)
	# putting sleep 10 to work around as of now
	# sleep 10
	btrfs fi balance $SCRATCH_MNT || _fail "dev balance failed"

	# cleaup. add the removed disk
	umount $SCRATCH_MNT
	_devmgt_add "${DEVHTL}"
	dev_removed=0
}

_test_remove()
{
	_scratch_mkfs "$SCRATCH_DEV_POOL" > /dev/null 2>&1 || _fail "mkfs failed"
	_scratch_mount
	dirp=`mktemp -duq $SCRATCH_MNT/dir.XXXXXX`
	_populate_fs -n 1 -f 20 -d 10 -r $dirp -s 10

	# pick last dev in the list
	dev_del=`echo ${SCRATCH_DEV_POOL} | awk '{print $NF}'`
	btrfs device delete $dev_del $SCRATCH_MNT || _fail "btrfs device delete failed"
	btrfs fi show $SCRATCH_DEV 2>&1 | grep $dev_del > /dev/null && _fail "btrfs still shows the deleted dev"
	umount $SCRATCH_MNT
}

_test_raid0
_test_raid1
_test_raid10
_test_single
_test_add
_test_replace
_test_remove

echo "Silence is golden"
status=0; exit