# Copyright (C) 2010 Red Hat, Inc. All rights reserved.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

which mkfs.ext3 || exit 200

# Get linux minor version
linux_minor=$(echo `uname -r` | cut -d'.' -f3 | cut -d'-' -f1)

test $linux_minor -ge 31 || exit 200

. ./test-utils.sh

check_logical_block_size()
{
    local DEV_=$1
    local LOGICAL_BS=$2
    # Verify logical_block_size - requires Linux >= 2.6.31
    SYSFS_LOGICAL_BLOCK_SIZE=`echo /sys/block/$(basename $DEV_)/queue/logical_block_size`
    if [ -f "$SYSFS_LOGICAL_BLOCK_SIZE" ] ; then
	ACTUAL_LOGICAL_BLOCK_SIZE=`cat $SYSFS_LOGICAL_BLOCK_SIZE`
	test $ACTUAL_LOGICAL_BLOCK_SIZE = $LOGICAL_BS
    fi
}

lvdev_()
{
    echo "$DM_DEV_DIR/$1/$2"
}

test_snapshot_mount()
{
    lvcreate -L 16M -n $lv1 $vg $dev1
    mkfs.ext3 $(lvdev_ $vg $lv1)
    mkdir test_mnt
    mount $(lvdev_ $vg $lv1) test_mnt
    lvcreate -L 16M -n $lv2 -s $vg/$lv1
    umount test_mnt
    # mount the origin
    mount $(lvdev_ $vg $lv1) test_mnt
    umount test_mnt
    # mount the snapshot
    mount $(lvdev_ $vg $lv2) test_mnt
    umount test_mnt
    rm -r test_mnt
    vgchange -an $vg
    lvremove -f $vg/$lv2
    lvremove -f $vg/$lv1
}

# FIXME add more topology-specific tests and validation (striped LVs, etc)

NUM_DEVS=1
PER_DEV_SIZE=33
DEV_SIZE=$(($NUM_DEVS*$PER_DEV_SIZE))

# ---------------------------------------------
# Create "desktop-class" 4K drive
# (logical_block_size=512, physical_block_size=4096, alignment_offset=0):
LOGICAL_BLOCK_SIZE=512
prepare_scsi_debug_dev $DEV_SIZE \
    sector_size=$LOGICAL_BLOCK_SIZE physblk_exp=3
check_logical_block_size $SCSI_DEBUG_DEV $LOGICAL_BLOCK_SIZE

aux prepare_pvs $NUM_DEVS $PER_DEV_SIZE
vgcreate -c n $vg $devs
test_snapshot_mount
vgremove $vg

cleanup_scsi_debug_dev

# ---------------------------------------------
# Create "desktop-class" 4K drive w/ 63-sector DOS partition compensation
# (logical_block_size=512, physical_block_size=4096, alignment_offset=3584):
LOGICAL_BLOCK_SIZE=512
prepare_scsi_debug_dev $DEV_SIZE \
    sector_size=$LOGICAL_BLOCK_SIZE physblk_exp=3 lowest_aligned=7
check_logical_block_size $SCSI_DEBUG_DEV $LOGICAL_BLOCK_SIZE

aux prepare_pvs $NUM_DEVS $PER_DEV_SIZE
vgcreate -c n $vg $devs
test_snapshot_mount
vgremove $vg

cleanup_scsi_debug_dev

# ---------------------------------------------
# Create "enterprise-class" 4K drive
# (logical_block_size=4096, physical_block_size=4096, alignment_offset=0):
LOGICAL_BLOCK_SIZE=4096
prepare_scsi_debug_dev $DEV_SIZE \
    sector_size=$LOGICAL_BLOCK_SIZE
check_logical_block_size $SCSI_DEBUG_DEV $LOGICAL_BLOCK_SIZE

aux prepare_pvs $NUM_DEVS $PER_DEV_SIZE
vgcreate -c n $vg $devs
test_snapshot_mount
vgremove $vg