#! /bin/bash
# FS QA Test No. btrfs/001
#
# Test btrfs's subvolume and snapshot support
#
#-----------------------------------------------------------------------
# Copyright (c) 2011 Red Hat.  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
#
#-----------------------------------------------------------------------
#

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

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!

_cleanup()
{
    rm -f $tmp.*
}

trap "_cleanup ; exit \$status" 0 1 2 3 15

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

# real QA test starts here
_supported_fs btrfs
_supported_os Linux
_require_scratch

_scratch_mkfs > /dev/null 2>&1
_scratch_mount

# First test basic snapshotting
echo "Creating file foo in root dir"
dd if=/dev/zero of=$SCRATCH_MNT/foo bs=1M count=1 &> /dev/null
echo "List root dir"
ls $SCRATCH_MNT
echo "Creating snapshot of root dir"
$BTRFS_UTIL_PROG subvolume snapshot $SCRATCH_MNT $SCRATCH_MNT/snap | _filter_scratch
echo "List root dir after snapshot"
ls $SCRATCH_MNT
echo "List snapshot dir"
ls $SCRATCH_MNT/snap
rm -f $SCRATCH_MNT/foo
echo "List root dir after rm of foo"
ls $SCRATCH_MNT
echo "List snapshot dir"
ls $SCRATCH_MNT/snap

# Test creating a normal subvolme
$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/subvol | _filter_scratch
echo "Listing root dir"
ls $SCRATCH_MNT
echo "Listing subvol"
ls $SCRATCH_MNT/subvol

# Test setting a default mount
echo "Creating file bar in subvol"
dd if=/dev/zero of=$SCRATCH_MNT/subvol/bar bs=1M count=1 &> /dev/null
echo "Setting subvol to the default"
subvolid=$(_btrfs_get_subvolid $SCRATCH_MNT subvol)
$BTRFS_UTIL_PROG subvolume set-default $subvolid $SCRATCH_MNT | _filter_scratch
_scratch_cycle_mount
echo "List root dir which is now subvol"
ls $SCRATCH_MNT
_scratch_unmount
echo "Mounting sbuvolid=0 for the root dir"
_scratch_mount "-o subvolid=0"
echo "List root dir"
ls $SCRATCH_MNT
echo "Setting the root dir as the default again"
$BTRFS_UTIL_PROG subvolume set-default 0 $SCRATCH_MNT | _filter_scratch
_scratch_cycle_mount
echo "List root dir"
ls $SCRATCH_MNT

# Test listing the subvolumes
echo "Listing subvolumes"
$BTRFS_UTIL_PROG subvolume list $SCRATCH_MNT | awk '{ print $NF }'

# Delete the snapshot
$BTRFS_UTIL_PROG subvolume delete $SCRATCH_MNT/snap | _filter_btrfs_subvol_delete
echo "List root dir"
ls $SCRATCH_MNT
_scratch_cycle_mount
echo "List root dir"
ls $SCRATCH_MNT

status=0 ; exit