X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fqa%2Fworkunits%2Frbd%2Fimage_read.sh;fp=src%2Fceph%2Fqa%2Fworkunits%2Frbd%2Fimage_read.sh;h=907ce869bc44a863a55f46e940a434c190b4bc27;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/qa/workunits/rbd/image_read.sh b/src/ceph/qa/workunits/rbd/image_read.sh
new file mode 100755
index 0000000..907ce86
--- /dev/null
+++ b/src/ceph/qa/workunits/rbd/image_read.sh
@@ -0,0 +1,677 @@
+#!/bin/bash -e
+
+# Copyright (C) 2013 Inktank Storage, Inc.
+#
+# This is free software; see the source for copying conditions.
+# There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE.
+#
+# This 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 version 2.
+
+# Alex Elder <elder@inktank.com>
+# April 10, 2013
+
+################################################################
+
+# The purpose of this test is to validate that data read from a
+# mapped rbd image is what it's expected to be.
+#
+# By default it creates an image and fills it with some data.  It
+# then reads back the data at a series of offsets known to cover
+# various situations (such as reading the beginning, end, or the
+# entirety of an object, or doing a read that spans multiple
+# objects), and stashes the results in a set of local files.
+#
+# It also creates and maps a snapshot of the original image after
+# it's been filled, and reads back the same ranges of data from the
+# snapshot.  It then compares the data read back with what was read
+# back from the original image, verifying they match.
+#
+# Clone functionality is tested as well, in which case a clone is
+# made of the snapshot, and the same ranges of data are again read
+# and compared with the original.  In addition, a snapshot of that
+# clone is created, and a clone of *that* snapshot is put through
+# the same set of tests.  (Clone testing can be optionally skipped.)
+
+################################################################
+
+# Default parameter values.  Environment variables, if set, will
+# supercede these defaults.  Such variables have names that begin
+# with "IMAGE_READ_", for e.g. use IMAGE_READ_PAGE_SIZE=65536
+# to use 65536 as the page size.
+
+DEFAULT_VERBOSE=true
+DEFAULT_TEST_CLONES=true
+DEFAULT_LOCAL_FILES=false
+DEFAULT_FORMAT=2
+DEFAULT_DOUBLE_ORDER=true
+DEFAULT_HALF_ORDER=false
+DEFAULT_PAGE_SIZE=4096
+DEFAULT_OBJECT_ORDER=22
+MIN_OBJECT_ORDER=12	# technically 9, but the rbd CLI enforces 12
+MAX_OBJECT_ORDER=32
+
+PROGNAME=$(basename $0)
+
+ORIGINAL=original-$$
+SNAP1=snap1-$$
+CLONE1=clone1-$$
+SNAP2=snap2-$$
+CLONE2=clone2-$$
+
+function err() {
+	if [ $# -gt 0 ]; then
+		echo "${PROGNAME}: $@" >&2
+	fi
+	exit 2
+}
+
+function usage() {
+	if [ $# -gt 0 ]; then
+		echo "" >&2
+		echo "${PROGNAME}: $@" >&2
+	fi
+	echo "" >&2
+	echo "Usage: ${PROGNAME} [<options>]" >&2
+	echo "" >&2
+	echo "options are:" >&2
+	echo "    -o object_order" >&2
+	echo "        must be ${MIN_OBJECT_ORDER}..${MAX_OBJECT_ORDER}" >&2
+	echo "    -p page_size    (in bytes)" >&2
+	echo "        note: there must be at least 4 pages per object" >&2
+	echo "    -1" >&2
+	echo "        test using format 1 rbd images (default)" >&2
+	echo "    -2" >&2
+	echo "        test using format 2 rbd images" >&2
+	echo "    -c" >&2
+	echo "        also test rbd clone images (implies format 2)" >&2
+	echo "    -d" >&2
+	echo "        clone object order double its parent's (format 2)" >&2
+	echo "    -h" >&2
+	echo "        clone object order half of its parent's (format 2)" >&2
+	echo "    -l" >&2
+	echo "        use local files rather than rbd images" >&2
+	echo "    -v" >&2
+	echo "        disable reporting of what's going on" >&2
+	echo "" >&2
+	exit 1
+}
+
+function verbose() {
+	[ "${VERBOSE}" = true ] && echo "$@"
+	true	# Don't let the verbose test spoil our return value
+}
+
+function quiet() {
+	"$@" 2> /dev/null
+}
+
+function boolean_toggle() {
+	[ $# -eq 1 ] || exit 99
+	test "$1" = "true" && echo false || echo true
+}
+
+function parseargs() {
+	local opts="o:p:12clv"
+	local lopts="order:,page_size:,local,clone,verbose"
+	local parsed
+	local clone_order_msg
+
+	# use values from environment if available
+	VERBOSE="${IMAGE_READ_VERBOSE:-${DEFAULT_VERBOSE}}"
+	TEST_CLONES="${IMAGE_READ_TEST_CLONES:-${DEFAULT_TEST_CLONES}}"
+	LOCAL_FILES="${IMAGE_READ_LOCAL_FILES:-${DEFAULT_LOCAL_FILES}}"
+	DOUBLE_ORDER="${IMAGE_READ_DOUBLE_ORDER:-${DEFAULT_DOUBLE_ORDER}}"
+	HALF_ORDER="${IMAGE_READ_HALF_ORDER:-${DEFAULT_HALF_ORDER}}"
+	FORMAT="${IMAGE_READ_FORMAT:-${DEFAULT_FORMAT}}"
+	PAGE_SIZE="${IMAGE_READ_PAGE_SIZE:-${DEFAULT_PAGE_SIZE}}"
+	OBJECT_ORDER="${IMAGE_READ_OBJECT_ORDER:-${DEFAULT_OBJECT_ORDER}}"
+
+	parsed=$(getopt -o "${opts}" -l "${lopts}" -n "${PROGNAME}" -- "$@") ||
+		usage
+	eval set -- "${parsed}"
+	while true; do
+		case "$1" in
+		-v|--verbose)
+			VERBOSE=$(boolean_toggle "${VERBOSE}");;
+		-c|--clone)
+			TEST_CLONES=$(boolean_toggle "${TEST_CLONES}");;
+		-d|--double)
+			DOUBLE_ORDER=$(boolean_toggle "${DOUBLE_ORDER}");;
+		-h|--half)
+			HALF_ORDER=$(boolean_toggle "${HALF_ORDER}");;
+		-l|--local)
+			LOCAL_FILES=$(boolean_toggle "${LOCAL_FILES}");;
+		-1|-2)
+			FORMAT="${1:1}";;
+		-p|--page_size)
+			PAGE_SIZE="$2"; shift;;
+		-o|--order)
+			OBJECT_ORDER="$2"; shift;;
+		--)
+			shift; break;;
+		*)
+			err "getopt internal error"
+		esac
+		shift
+	done
+	[ $# -gt 0 ] && usage "excess arguments ($*)"
+
+	if [ "${TEST_CLONES}" = true ]; then
+		# If we're using different object orders for clones,
+		# make sure the limits are updated accordingly.  If
+		# both "half" and "double" are specified, just
+		# ignore them both.
+		if [ "${DOUBLE_ORDER}" = true ]; then
+			if [ "${HALF_ORDER}" = true ]; then
+				DOUBLE_ORDER=false
+				HALF_ORDER=false
+			else
+				((MAX_OBJECT_ORDER -= 2))
+			fi
+		elif [ "${HALF_ORDER}" = true ]; then
+			((MIN_OBJECT_ORDER += 2))
+		fi
+	fi
+
+	[ "${OBJECT_ORDER}" -lt "${MIN_OBJECT_ORDER}" ] &&
+		usage "object order (${OBJECT_ORDER}) must be" \
+			"at least ${MIN_OBJECT_ORDER}"
+	[ "${OBJECT_ORDER}" -gt "${MAX_OBJECT_ORDER}" ] &&
+		usage "object order (${OBJECT_ORDER}) must be" \
+			"at most ${MAX_OBJECT_ORDER}"
+
+	if [ "${TEST_CLONES}" = true ]; then
+		if [ "${DOUBLE_ORDER}" = true ]; then
+			((CLONE1_ORDER = OBJECT_ORDER + 1))
+			((CLONE2_ORDER = OBJECT_ORDER + 2))
+			clone_order_msg="double"
+		elif [ "${HALF_ORDER}" = true ]; then
+			((CLONE1_ORDER = OBJECT_ORDER - 1))
+			((CLONE2_ORDER = OBJECT_ORDER - 2))
+			clone_order_msg="half of"
+		else
+			CLONE1_ORDER="${OBJECT_ORDER}"
+			CLONE2_ORDER="${OBJECT_ORDER}"
+			clone_order_msg="the same as"
+		fi
+	fi
+
+	[ "${TEST_CLONES}" != true ] || FORMAT=2
+
+	OBJECT_SIZE=$(echo "2 ^ ${OBJECT_ORDER}" | bc)
+	OBJECT_PAGES=$(echo "${OBJECT_SIZE} / ${PAGE_SIZE}" | bc)
+	IMAGE_SIZE=$((2 * 16 * OBJECT_SIZE / (1024 * 1024)))
+	[ "${IMAGE_SIZE}" -lt 1 ] && IMAGE_SIZE=1
+	IMAGE_OBJECTS=$((IMAGE_SIZE * (1024 * 1024) / OBJECT_SIZE))
+
+	[ "${OBJECT_PAGES}" -lt 4 ] &&
+		usage "object size (${OBJECT_SIZE}) must be" \
+			"at least 4 * page size (${PAGE_SIZE})"
+
+	echo "parameters for this run:"
+	echo "    format ${FORMAT} images will be tested"
+	echo "    object order is ${OBJECT_ORDER}, so" \
+		"objects are ${OBJECT_SIZE} bytes"
+	echo "    page size is ${PAGE_SIZE} bytes, so" \
+		"there are are ${OBJECT_PAGES} pages in an object"
+	echo "    derived image size is ${IMAGE_SIZE} MB, so" \
+		"there are ${IMAGE_OBJECTS} objects in an image"
+	if [ "${TEST_CLONES}" = true ]; then
+		echo "    clone functionality will be tested"
+		echo "    object size for a clone will be ${clone_order_msg}"
+		echo "        the object size of its parent image"
+	fi
+
+	true	# Don't let the clones test spoil our return value
+}
+
+function image_dev_path() {
+	[ $# -eq 1 ] || exit 99
+	local image_name="$1"
+
+	if [ "${LOCAL_FILES}" = true ]; then
+		echo "${TEMP}/${image_name}"
+		return
+	fi
+
+	echo "/dev/rbd/rbd/${image_name}"
+}
+
+function out_data_dir() {
+	[ $# -lt 2 ] || exit 99
+	local out_data="${TEMP}/data"
+	local image_name
+
+	if [ $# -eq 1 ]; then
+		image_name="$1"
+		echo "${out_data}/${image_name}"
+	else
+		echo "${out_data}"
+	fi
+}
+
+function setup() {
+	verbose "===== setting up ====="
+	TEMP=$(mktemp -d /tmp/rbd_image_read.XXXXX)
+	mkdir -p $(out_data_dir)
+
+	# create and fill the original image with some data
+	create_image "${ORIGINAL}"
+	map_image "${ORIGINAL}"
+	fill_original
+
+	# create a snapshot of the original
+	create_image_snap "${ORIGINAL}" "${SNAP1}"
+	map_image_snap "${ORIGINAL}" "${SNAP1}"
+
+	if [ "${TEST_CLONES}" = true ]; then
+		# create a clone of the original snapshot
+		create_snap_clone "${ORIGINAL}" "${SNAP1}" \
+			"${CLONE1}" "${CLONE1_ORDER}"
+		map_image "${CLONE1}"
+
+		# create a snapshot of that clone
+		create_image_snap "${CLONE1}" "${SNAP2}"
+		map_image_snap "${CLONE1}" "${SNAP2}"
+
+		# create a clone of that clone's snapshot
+		create_snap_clone "${CLONE1}" "${SNAP2}" \
+			"${CLONE2}" "${CLONE2_ORDER}"
+		map_image "${CLONE2}"
+	fi
+}
+
+function teardown() {
+	verbose "===== cleaning up ====="
+	if [ "${TEST_CLONES}" = true ]; then
+		unmap_image "${CLONE2}"					|| true
+		destroy_snap_clone "${CLONE1}" "${SNAP2}" "${CLONE2}"	|| true
+
+		unmap_image_snap "${CLONE1}" "${SNAP2}"			|| true
+		destroy_image_snap "${CLONE1}" "${SNAP2}"		|| true
+
+		unmap_image "${CLONE1}"					|| true
+		destroy_snap_clone "${ORIGINAL}" "${SNAP1}" "${CLONE1}"	|| true
+	fi
+	unmap_image_snap "${ORIGINAL}" "${SNAP1}"			|| true
+	destroy_image_snap "${ORIGINAL}" "${SNAP1}"			|| true
+	unmap_image "${ORIGINAL}"					|| true
+	destroy_image "${ORIGINAL}"					|| true
+
+	rm -rf $(out_data_dir)
+	rmdir "${TEMP}"
+}
+
+function create_image() {
+	[ $# -eq 1 ] || exit 99
+	local image_name="$1"
+	local image_path
+	local bytes
+
+	verbose "creating image \"${image_name}\""
+	if [ "${LOCAL_FILES}" = true ]; then
+		image_path=$(image_dev_path "${image_name}")
+		bytes=$(echo "${IMAGE_SIZE} * 1024 * 1024 - 1" | bc)
+		quiet dd if=/dev/zero bs=1 count=1 seek="${bytes}" \
+			of="${image_path}"
+		return
+	fi
+
+	rbd create "${image_name}" --image-format "${FORMAT}" \
+		--size "${IMAGE_SIZE}" --order "${OBJECT_ORDER}" \
+		--image-shared
+}
+
+function destroy_image() {
+	[ $# -eq 1 ] || exit 99
+	local image_name="$1"
+	local image_path
+
+	verbose "destroying image \"${image_name}\""
+	if [ "${LOCAL_FILES}" = true ]; then
+		image_path=$(image_dev_path "${image_name}")
+		rm -f "${image_path}"
+		return
+	fi
+
+	rbd rm "${image_name}"
+}
+
+function map_image() {
+	[ $# -eq 1 ] || exit 99
+	local image_name="$1"		# can be image@snap too
+
+	if [ "${LOCAL_FILES}" = true ]; then
+		return
+	fi
+
+	sudo rbd map "${image_name}"
+}
+
+function unmap_image() {
+	[ $# -eq 1 ] || exit 99
+	local image_name="$1"		# can be image@snap too
+	local image_path
+
+	if [ "${LOCAL_FILES}" = true ]; then
+		return
+	fi
+	image_path=$(image_dev_path "${image_name}")
+
+	if [ -e "${image_path}" ]; then
+		sudo rbd unmap "${image_path}"
+	fi
+}
+
+function map_image_snap() {
+	[ $# -eq 2 ] || exit 99
+	local image_name="$1"
+	local snap_name="$2"
+	local image_snap
+
+	if [ "${LOCAL_FILES}" = true ]; then
+		return
+	fi
+
+	image_snap="${image_name}@${snap_name}"
+	map_image "${image_snap}"
+}
+
+function unmap_image_snap() {
+	[ $# -eq 2 ] || exit 99
+	local image_name="$1"
+	local snap_name="$2"
+	local image_snap
+
+	if [ "${LOCAL_FILES}" = true ]; then
+		return
+	fi
+
+	image_snap="${image_name}@${snap_name}"
+	unmap_image "${image_snap}"
+}
+
+function create_image_snap() {
+	[ $# -eq 2 ] || exit 99
+	local image_name="$1"
+	local snap_name="$2"
+	local image_snap="${image_name}@${snap_name}"
+	local image_path
+	local snap_path
+
+	verbose "creating snapshot \"${snap_name}\"" \
+		"of image \"${image_name}\""
+	if [ "${LOCAL_FILES}" = true ]; then
+		image_path=$(image_dev_path "${image_name}")
+		snap_path=$(image_dev_path "${image_snap}")
+
+		cp "${image_path}" "${snap_path}"
+		return
+	fi
+
+	rbd snap create "${image_snap}"
+}
+
+function destroy_image_snap() {
+	[ $# -eq 2 ] || exit 99
+	local image_name="$1"
+	local snap_name="$2"
+	local image_snap="${image_name}@${snap_name}"
+	local snap_path
+
+	verbose "destroying snapshot \"${snap_name}\"" \
+		"of image \"${image_name}\""
+	if [ "${LOCAL_FILES}" = true ]; then
+		snap_path=$(image_dev_path "${image_snap}")
+		rm -rf "${snap_path}"
+		return
+	fi
+
+	rbd snap rm "${image_snap}"
+}
+
+function create_snap_clone() {
+	[ $# -eq 4 ] || exit 99
+	local image_name="$1"
+	local snap_name="$2"
+	local clone_name="$3"
+	local clone_order="$4"
+	local image_snap="${image_name}@${snap_name}"
+	local snap_path
+	local clone_path
+
+	verbose "creating clone image \"${clone_name}\"" \
+		"of image snapshot \"${image_name}@${snap_name}\""
+	if [ "${LOCAL_FILES}" = true ]; then
+		snap_path=$(image_dev_path "${image_name}@${snap_name}")
+		clone_path=$(image_dev_path "${clone_name}")
+
+		cp "${snap_path}" "${clone_path}"
+		return
+	fi
+
+	rbd snap protect "${image_snap}"
+	rbd clone --order "${clone_order}" --image-shared \
+		"${image_snap}" "${clone_name}"
+}
+
+function destroy_snap_clone() {
+	[ $# -eq 3 ] || exit 99
+	local image_name="$1"
+	local snap_name="$2"
+	local clone_name="$3"
+	local image_snap="${image_name}@${snap_name}"
+	local clone_path
+
+	verbose "destroying clone image \"${clone_name}\""
+	if [ "${LOCAL_FILES}" = true ]; then
+		clone_path=$(image_dev_path "${clone_name}")
+
+		rm -rf "${clone_path}"
+		return
+	fi
+
+	rbd rm "${clone_name}"
+	rbd snap unprotect "${image_snap}"
+}
+
+# function that produces "random" data with which to fill the image
+function source_data() {
+	while quiet dd if=/bin/bash skip=$(($$ % 199)) bs="${PAGE_SIZE}"; do
+		:	# Just do the dd
+	done
+}
+
+function fill_original() {
+	local image_path=$(image_dev_path "${ORIGINAL}")
+
+	verbose "filling original image"
+	# Fill 16 objects worth of "random" data
+	source_data |
+	quiet dd bs="${PAGE_SIZE}" count=$((16 * OBJECT_PAGES)) \
+		of="${image_path}"
+}
+
+function do_read() {
+	[ $# -eq 3 -o $# -eq 4 ] || exit 99
+	local image_name="$1"
+	local offset="$2"
+	local length="$3"
+	[ "${length}" -gt 0 ] || err "do_read: length must be non-zero"
+	local image_path=$(image_dev_path "${image_name}")
+	local out_data=$(out_data_dir "${image_name}")
+	local range=$(printf "%06u~%04u" "${offset}" "${length}")
+	local out_file
+
+	[ $# -eq 4 ] && offset=$((offset + 16 * OBJECT_PAGES))
+
+	verbose "reading \"${image_name}\" pages ${range}"
+
+	out_file="${out_data}/pages_${range}"
+
+	quiet dd bs="${PAGE_SIZE}" skip="${offset}" count="${length}" \
+		if="${image_path}" of="${out_file}"
+}
+
+function one_pass() {
+	[ $# -eq 1 -o $# -eq 2 ] || exit 99
+	local image_name="$1"
+	local extended
+	[ $# -eq 2 ] && extended="true"
+	local offset
+	local length
+
+	offset=0
+
+	# +-----------+-----------+---
+	# |X:X:X...X:X| : : ... : | :
+	# +-----------+-----------+---
+	length="${OBJECT_PAGES}"
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# ---+-----------+---
+	#  : |X: : ... : | :
+	# ---+-----------+---
+	length=1
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# ---+-----------+---
+	#  : | :X: ... : | :
+	# ---+-----------+---
+	length=1
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# ---+-----------+---
+	#  : | : :X...X: | :
+	# ---+-----------+---
+	length=$((OBJECT_PAGES - 3))
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# ---+-----------+---
+	#  : | : : ... :X| :
+	# ---+-----------+---
+	length=1
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# ---+-----------+---
+	#  : |X:X:X...X:X| :
+	# ---+-----------+---
+	length="${OBJECT_PAGES}"
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	offset=$((offset + 1))		# skip 1
+
+	# ---+-----------+---
+	#  : | :X:X...X:X| :
+	# ---+-----------+---
+	length=$((OBJECT_PAGES - 1))
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# ---+-----------+-----------+---
+	#  : |X:X:X...X:X|X: : ... : | :
+	# ---+-----------+-----------+---
+	length=$((OBJECT_PAGES + 1))
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# ---+-----------+-----------+---
+	#  : | :X:X...X:X|X: : ... : | :
+	# ---+-----------+-----------+---
+	length="${OBJECT_PAGES}"
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# ---+-----------+-----------+---
+	#  : | :X:X...X:X|X:X: ... : | :
+	# ---+-----------+-----------+---
+	length=$((OBJECT_PAGES + 1))
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# ---+-----------+-----------+---
+	#  : | : :X...X:X|X:X:X...X:X| :
+	# ---+-----------+-----------+---
+	length=$((2 * OBJECT_PAGES + 2))
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	offset=$((offset + 1))		# skip 1
+
+	# ---+-----------+-----------+-----
+	#  : | :X:X...X:X|X:X:X...X:X|X: :
+	# ---+-----------+-----------+-----
+	length=$((2 * OBJECT_PAGES))
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	offset=$((offset + length))
+
+	# --+-----------+-----------+--------
+	#  : | :X:X...X:X|X:X:X...X:X|X:X: :
+	# --+-----------+-----------+--------
+	length=2049
+	length=$((2 * OBJECT_PAGES + 1))
+	do_read "${image_name}" "${offset}" "${length}" ${extended}
+	# offset=$((offset + length))
+}
+
+function run_using() {
+	[ $# -eq 1 ] || exit 99
+	local image_name="$1"
+	local out_data=$(out_data_dir "${image_name}")
+
+	verbose "===== running using \"${image_name}\" ====="
+	mkdir -p "${out_data}"
+	one_pass "${image_name}"
+	one_pass "${image_name}" extended
+}
+
+function compare() {
+	[ $# -eq 1 ] || exit 99
+	local image_name="$1"
+	local out_data=$(out_data_dir "${image_name}")
+	local original=$(out_data_dir "${ORIGINAL}")
+
+	verbose "===== comparing \"${image_name}\" ====="
+	for i in $(ls "${original}"); do
+		verbose compare "\"${image_name}\" \"${i}\""
+		cmp "${original}/${i}" "${out_data}/${i}"
+	done
+	[ "${image_name}" = "${ORIGINAL}" ] || rm -rf "${out_data}"
+}
+
+function doit() {
+	[ $# -eq 1 ] || exit 99
+	local image_name="$1"
+
+	run_using "${image_name}"
+	compare "${image_name}"
+}
+
+########## Start
+
+parseargs "$@"
+
+trap teardown EXIT HUP INT
+setup
+
+run_using "${ORIGINAL}"
+doit "${ORIGINAL}@${SNAP1}"
+if [ "${TEST_CLONES}" = true ]; then
+	doit "${CLONE1}"
+	doit "${CLONE1}@${SNAP2}"
+	doit "${CLONE2}"
+fi
+rm -rf $(out_data_dir "${ORIGINAL}")
+
+echo "Success!"
+
+exit 0