diff --git a/ipset-config b/ipset-config
new file mode 100644
index 0000000..758f40b
--- /dev/null
+++ b/ipset-config
@@ -0,0 +1,5 @@
+# Save current ipsets on stop.
+#   Value: yes|no,  default: no
+# Saves all ipsets to /etc/sysconfig/ipset.d/ if service gets stopped
+# (e.g. on system shutdown).
+IPSET_SAVE_ON_STOP="no"
diff --git a/ipset.service b/ipset.service
index f4a0802..65c3121 100644
--- a/ipset.service
+++ b/ipset.service
@@ -9,10 +9,11 @@ RemainAfterExit=yes
 ExecStart=/usr/libexec/ipset/ipset.start-stop start
 ExecStop=/usr/libexec/ipset/ipset.start-stop stop
 ExecReload=/usr/libexec/ipset/ipset.start-stop reload
-# Save current ipset entries on stop/restart.
+# Save current ipset entries on stop.
 #   Value: yes|no,  default: no
-# Saves all ipsets to /etc/ipset/ipset if ipset gets stopped
-Environment=IPSET_SAVE_ON_STOP=no IPSET_SAVE_ON_RESTART=no
+# Saves all ipsets to /etc/sysconfig/ipset if ipset gets stopped
+Environment=IPSET_SAVE_ON_STOP=no
+EnvironmentFile=-/etc/sysconfig/ipset-config
 
 [Install]
 WantedBy=basic.target
diff --git a/ipset.spec b/ipset.spec
index 0467c5a..1ae7362 100644
--- a/ipset.spec
+++ b/ipset.spec
@@ -1,6 +1,6 @@
 Name:             ipset
 Version:          7.15
-Release:          2%{?dist}
+Release:          3%{?dist}
 Summary:          Manage Linux IP sets
 
 License:          GPLv2
@@ -8,6 +8,7 @@ URL:              http://ipset.netfilter.org/
 Source0:          %{url}/%{name}-%{version}.tar.bz2
 Source1:          %{name}.service
 Source2:          %{name}.start-stop
+Source3:          %{name}-config
 
 BuildRequires:    libmnl-devel
 BuildRequires:    automake
@@ -100,6 +101,10 @@ install -c -m 644 %{SOURCE1} %{buildroot}/%{_unitdir}
 install -d -m 755 %{buildroot}%{_libexecdir}/%{name}
 install -c -m 755 %{SOURCE2} %{buildroot}%{_libexecdir}/%{name}
 
+# install ipset-config
+install -d -m 755 %{buildroot}%{_sysconfdir}/sysconfig
+install -c -m 600 %{SOURCE3} %{buildroot}%{_sysconfdir}/sysconfig/%{name}-config
+
 # Create directory for configuration
 mkdir -p %{buildroot}%{_sysconfdir}/%{name}
 
@@ -116,6 +121,18 @@ fi
 
 %post service
 %systemd_post %{name}.service
+if [[ -f /etc/ipset/ipset ]] && [[ ! -f /etc/sysconfig/ipset ]]; then
+	mv /etc/ipset/ipset /etc/sysconfig/ipset
+	ln -s /etc/sysconfig/ipset /etc/ipset/ipset
+	echo "Warning: ipset save location has moved to /etc/sysconfig"
+fi
+[[ -f /etc/sysconfig/iptables-config ]] && . /etc/sysconfig/iptables-config
+[[ -f /etc/sysconfig/ip6tables-config ]] && . /etc/sysconfig/ip6tables-config
+if [[ ${IPTABLES_SAVE_ON_STOP} == yes ]] || \
+   [[ ${IP6TABLES_SAVE_ON_STOP} == yes ]]; then
+	echo "Warning: ipset no longer saves automatically when iptables does"
+	echo "         must enable explicitly in /etc/sysconfig/ipset-config"
+fi
 
 %preun service
 if [[ $1 -eq 0 && -n $(lsmod | grep "^xt_set ") ]]; then
@@ -148,11 +165,15 @@ fi
 %files service
 %{_unitdir}/%{name}.service
 %dir %{_libexecdir}/%{name}
+%config(noreplace) %attr(0600,root,root) %{_sysconfdir}/sysconfig/ipset-config
+%ghost %config(noreplace) %attr(0600,root,root) %{_sysconfdir}/sysconfig/ipset
 %attr(0755,root,root) %{_libexecdir}/%{name}/%{name}.start-stop
-%dir %{_sysconfdir}/%{name}
 
 
 %changelog
+* Tue Mar 15 2022 Phil Sutter <psutter@redhat.com> - 7.15-3
+- Use the advanced init script from Centos9Stream
+
 * Thu Jan 20 2022 Fedora Release Engineering <releng@fedoraproject.org> - 7.15-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild
 
diff --git a/ipset.start-stop b/ipset.start-stop
index da21890..377beed 100644
--- a/ipset.start-stop
+++ b/ipset.start-stop
@@ -1,209 +1,359 @@
-#!/bin/bash
+#!/bin/sh
 #
 # ipset      Start and stop ipset firewall sets
 #
-# config: /etc/ipset/ipset
-#
+# config: /etc/sysconfig/ipset-config
 
-IPSET=ipset
-IPSET_BIN=/usr/sbin/${IPSET}
-IPSET_DATA=/etc/${IPSET}/${IPSET}
+IPSET_BIN=/usr/sbin/ipset
+IPSET_CONFIG=/etc/sysconfig/ipset-config
+IPSET_DATA_COMPAT=/etc/sysconfig/ipset
+IPSET_DATA_COMPAT_BACKUP=${IPSET_DATA_COMPAT}.save
+IPSET_DATA_DIR=/etc/sysconfig/ipset.d
+IPSET_DATA_DIR_BACKUP=${IPSET_DATA_DIR}.save
+IPSET_DATA_SAVED_FLAG=${IPSET_DATA_DIR}/.saved
+IPSET_LOCK=/run/ipset.lock
+IPSET_RUN=/run/ipset.run
+CLEAN_FILES=""
 
-IPTABLES_CONFIG=/etc/sysconfig/iptables-config
-IP6TABLES_CONFIG=${IPTABLES_CONFIG/iptables/ip6tables}
+trap "rm -rf \${CLEAN_FILES}" EXIT
 
-TMP_FIFO=/tmp/${IPSET}.$$
-
-if [[ ! -x ${IPSET_BIN} ]]; then
-	echo "${IPSET_BIN} does not exist."
-	exit 5
-fi
-
-CLEAN_FILES=TMP_FIFO
-trap "rm -f \$CLEAN_FILES" EXIT
-
-# Default ipset configuration:
-[[ -z $IPSET_SAVE_ON_STOP ]] && IPSET_SAVE_ON_STOP=no		# Overridden by ip(6)tables IP(6)TABLES_SAVE_ON_STOP
-[[ -z $IPSET_SAVE_ON_RESTART ]] && IPSET_SAVE_ON_RESTART=no	# Overridden by ip(6)tables IP(6)TABLES_SAVE_ON_RESTART
-
-# Load iptables configuration(s)
-[[ -f "$IPTABLES_CONFIG" ]] && . "$IPTABLES_CONFIG"
-[[ -f "$IP6TABLES_CONFIG" ]] && . "$IP6TABLES_CONFIG"
-
-# It doesn't make sense to save iptables config and not our config
-[[ ${IPTABLES_SAVE_ON_STOP} = yes || ${IP6TABLES_SAVE_ON_STOP} = yes ]] && IPSET_SAVE_ON_STOP=yes
-[[ ${IPTABLES_SAVE_ON_RESTART} = yes || ${IP6TABLES_SAVE_ON_RESTART} = yes ]] && IPSET_SAVE_ON_RESTART=yes
-
-check_can_unload() {
-    # If the xt_set module is loaded and can't be unloaded, then iptables is
-    # using ipsets, so refuse to stop the service.
-    if [[ -n $(lsmod | grep "^xt_set ") ]]; then
-	rmmod xt_set 2>/dev/null
-	[[ $? -ne 0 ]] && echo Current iptables configuration requires ipsets && return 1
-    fi
-
-    return 0
+info() {
+	echo "ipset: ${*}" >&2
 }
 
-flush_n_delete() {
-    local ret=0 set
-
-    # Flush sets
-    ${IPSET_BIN} flush
-    let ret+=$?
-
-    # Delete ipset sets. If we don't do them individually, then none
-    # will be deleted unless they all can be.
-    for set in $(${IPSET_BIN} list -name); do
-	    ${IPSET_BIN} destroy 2>/dev/null
-	    [[ $? -ne 0 ]] && ret=1
-    done
-
-    return $ret
+warn() {
+	echo "<4>ipset: ${*}" >&2
 }
 
-start_clean()
-{
-    mkfifo -m go= "${TMP_FIFO}"
-    [[ $? -ne 0 ]] && return 1
-
-    # Get the lists of sets in current(old) config and new config
-    old_sets="$(${IPSET_BIN} list -name | sort -u)"
-    new_sets="$(grep ^create "${IPSET_DATA}" | cut -d " " -f 2 | sort -u)"
-
-    # List of sets no longer wanted
-    drop_sets="$( printf "%s\n" "${old_sets}" > "${TMP_FIFO}"  &
-		  printf "%s\n" "${new_sets}" | comm -23 "${TMP_FIFO}" -
-		)"
-
-    # Get rid of sets no longer needed
-    # Unfortunately -! doesn't work for destroy, so we have to do it a command at a time
-    for dset in $drop_sets; do
-	ipset destroy $dset 2>/dev/null
-	# If it won't go - ? in use by iptables, just clear it
-	[[ $? -ne 0 ]] && ipset flush $dset
-    done
-
-    # Now delete the set members no longer required
-    ${IPSET_BIN} save | grep "^add " | sort >${TMP_FIFO} &
-      grep "^add " ${IPSET_DATA} | sort | comm -23 ${TMP_FIFO} - | sed -e "s/^add /del /" \
-      | ${IPSET_BIN} restore -!
-
-    # At last we can add the set members we haven't got
-    ipset restore -! <${IPSET_DATA}
-
-    rm ${TMP_FIFO}
-
-    return 0
+err() {
+	echo "<3>ipset: ${*}" >&2
 }
 
-start() {
-    # Do not start if there is no config file.
-    [[ ! -f "$IPSET_DATA" ]] && echo "Loaded with no configuration" && return 0
+[ -x ${IPSET_BIN} ] || { err "Cannot execute ${IPSET_BIN}"; exit 1; }
 
-    # We can skip the first bit and do a simple load if
-    # there is no current ipset configuration
-    res=1
-    if [[ -n $(${IPSET_BIN} list -name) ]]; then
-	# The following may fail for some bizarre reason
-	start_clean
-	res=$?
+# Source ipset configuration
+# shellcheck source=ipset-config
+[ -f ${IPSET_CONFIG} ] && . ${IPSET_CONFIG}
 
-	[[ $res -ne 0 ]] && echo "Some old configuration may remain"
-    fi
+set -f
 
-    # res -ne 0 => either start_clean failed, or we didn't need to run it
-    if [[ $res -ne 0 ]]; then
-	# This is the easy way to start but would leave any old
-	# entries still configured. Still, better than nothing -
-	# but fine if we had no config
-	${IPSET_BIN} restore -! <${IPSET_DATA}
-	res=$?
-    fi
-
-    if [[ $res -ne 0 ]]; then
-	return 1
-    fi
-
-    return 0
-}
-
-stop() {
-    # Nothing to stop if ip_set module is not loaded.
-    lsmod | grep -q "^ip_set "
-    [[ $? -ne 0 ]] && return 6
-
-    flush_n_delete
-    [[ $? -ne 0 ]] && echo Warning: Not all sets were flushed/deleted
-
-    return 0
+lock() {
+	CLEAN_FILES="${CLEAN_FILES} ${IPSET_LOCK}"
+	until mkdir ${IPSET_LOCK} 2>/dev/null; do :; done
 }
 
 save() {
-    # Do not save if ip_set module is not loaded.
-    lsmod | grep -q "^ip_set "
-    [[ $? -ne 0 ]] && return 6
+	fail=0
 
-    [[ -z $(${IPSET_BIN} list -name) ]] && return 0
+	# Make backups of existing configuration first, if any
+	[ -d ${IPSET_DATA_DIR} ] && mv -Tf ${IPSET_DATA_DIR} ${IPSET_DATA_DIR_BACKUP}
+	[ -f ${IPSET_DATA_COMPAT} ] && mv -Tf ${IPSET_DATA_COMPAT} ${IPSET_DATA_COMPAT_BACKUP}
 
-    ret=0
-    TMP_FILE=$(/bin/mktemp -q /tmp/$IPSET.XXXXXX) \
-	&& CLEAN_FILES+=" $TMP_FILE" \
-	&& chmod 600 "$TMP_FILE" \
-	&& ${IPSET_BIN} save > $TMP_FILE 2>/dev/null \
-	&& [[ -s $TMP_FILE ]] \
-	|| ret=1
+	rm -f ${IPSET_DATA_SAVED_FLAG}
 
-    if [[ $ret -eq 0 ]]; then
-	# No need to do anything if the files are the same
-	if [[ ! -f $IPSET_DATA ]]; then
-	    mv $TMP_FILE $IPSET_DATA && chmod 600 $IPSET_DATA || ret=1
-	else
-	    diff -q $TMP_FILE $IPSET_DATA >/dev/null
-	
-	    if [[ $? -ne 0 ]]; then
-		if [[ -f $IPSET_DATA ]]; then
-		    cp -f --preserve=timestamps $IPSET_DATA $IPSET_DATA.save \
-			&& chmod 600 $IPSET_DATA.save \
-			|| ret=1
+	# Save each set in a separate file
+	mkdir -p ${IPSET_DATA_DIR}
+	chmod 0700 ${IPSET_DATA_DIR}
+	IFS="
+"
+	for set in $(${IPSET_BIN} list -n -t); do
+		# Empty name allowed, use ".set" as suffix. 'ipset save' doesn't
+		# quote set names with spaces: if we have a space in the name,
+		# work around this by quoting it ourselves in the output.
+		# shellcheck disable=SC2003 # No POSIX equivalent to expr index
+		if expr index "${set}" " " >/dev/null; then
+			:> "${IPSET_DATA_DIR}/${set}.set"
+			for line in $(${IPSET_BIN} save "${set}"); do
+				create=0
+				echo "${line}" | grep -q "^create " && create=1
+				if [ $create -eq 1 ]; then
+					line=${line#create *}
+				else
+					line=${line#add *}
+				fi
+				line=${line#${set} *}
+				set="$(echo "${set}" | sed 's/"/\\"/g')"
+				if [ $create -eq 1 ]; then
+					echo "create \"${set}\" ${line}" >> "${IPSET_DATA_DIR}/${set}.set"
+				else
+					echo "add \"${set}\" ${line}" >> "${IPSET_DATA_DIR}/${set}.set"
+				fi
+			done
+		else
+			${IPSET_BIN} save "${set}" > "${IPSET_DATA_DIR}/${set}.set" || fail=1
 		fi
-		if [[ $ret -eq 0 ]]; then
-		    cp -f --preserve=timestamps $TMP_FILE $IPSET_DATA \
-			&& chmod 600 $IPSET_DATA \
-			|| ret=1
-		fi
-	    fi
-	fi
-    fi
+		[ -f "${IPSET_DATA_DIR}/${set}.set" ] && chmod 600 "${IPSET_DATA_DIR}/${set}.set"
+		[ $fail -eq 1 ] && err "Cannot save set ${set}" && unset IFS && return 1
+	done
+	touch ${IPSET_DATA_SAVED_FLAG} || { unset IFS; return 1; }
+	unset IFS
 
-    rm -f $TMP_FILE
-    return $ret
+	# Done: remove backups
+	rm -rf ${IPSET_DATA_DIR_BACKUP}
+	rm -rf ${IPSET_DATA_COMPAT_BACKUP}
+
+	return 0
 }
 
+# Generate a grep regexp matching abbreviated command forms. E.g., for create:
+# \(c\|cr\|cre\|crea\|creat\|create\)
+cmd_short_expr() {
+	out=
+	cmd_len=1
+	while [ "${cmd_len}" -le "${#1}" ]; do
+		[ -z "${out}" ] && out='\(' || out="${out}"'\|'
+		# shellcheck disable=SC2003 # No POSIX equivalent to expr substr
+		out="${out}$(expr substr "${1}" 1 "${cmd_len}")"
+		cmd_len=$((cmd_len + 1))
+	done
+	echo "${out}"'\)'
+}
 
+ipset_restore() {
+	file="${1}"
+
+	retfile="$(mktemp -q /tmp/ipset.XXXXXX)"
+	CLEAN_FILES="${CLEAN_FILES} ${retfile}"
+
+	# If restore fails due to invalid lines, remove them and retry
+	while ! restore_err="$( (${IPSET_BIN} -f "${file}" -! restore 2>&1; echo $? >"${retfile}") | head -n1; exit "$(cat "${retfile}")" )"; do
+		warn "${restore_err}"
+		case ${restore_err#*: } in
+		"No command specified"*)
+			line="$(grep -m1 -n "^${restore_err##* }" "${file}")"
+			line="${line%:*}"
+			;;
+		"Missing second mandatory argument to command "*)
+			cmd="${restore_err##* }"
+			cmd_expr="$(cmd_short_expr "${cmd}")"
+			line="$(grep -n '^'"${cmd_expr}" "${file}" | grep -m1 -v '^[0-9]\+\:'"${cmd_expr}"'[[:blank:]]\+[^[:blank:]]\+[[:blank:]]\+[^[:blank:]]\+')"
+			line="${line%:*}"
+			;;
+		"Missing mandatory argument to command "*)
+			cmd="${restore_err##* }"
+			cmd_expr="$(cmd_short_expr "${cmd}")"
+			line="$(grep -n '^'"${cmd_expr}" "${file}" | grep -m1 -v '^[0-9]\+\:'"${cmd_expr}"'[[:blank:]]\+[^[:blank:]]\+')"
+			line="${line%:*}"
+			;;
+		"Command "*"is invalid in restore mode"*)
+			restore_err_cmd="${restore_err#*: }"
+			restore_err_cmd="${restore_err_cmd#*\`}"
+			restore_err_cmd="${restore_err_cmd%%\'*}"
+			cmd="${restore_err_cmd##* }"
+			cmd_expr="$(cmd_short_expr "${cmd}")"
+			line="$(grep -m1 -ne '^'"${cmd_expr}"'[[:blank:]]\+' -e '^'"${restore_err_cmd}"'$' "${file}")"
+			line="${line%:*}"
+			;;
+		"Error in line "*)
+			line="${restore_err%: *}"
+			line="${line##* }"
+			;;
+		*)
+			rm "${retfile}"
+			CLEAN_FILES="${CLEAN_FILES%* ${retfile}}"
+			return 1
+			;;
+		esac
+
+		[ -z "${line}" ] && return 1
+
+		warn "Skipped invalid entry: $(sed "${line}q;d" "${file}")"
+		sed -i -e "${line}d" "${file}"
+
+		[ -s "${file}" ] || return 1
+	done
+
+	rm "${retfile}"
+	CLEAN_FILES="${CLEAN_FILES%* ${retfile}}"
+}
+
+load() {
+	if [ -f ${IPSET_DATA_SAVED_FLAG} ]; then
+		# If we have a cleanly saved directory with all sets, we can
+		# delete any left-overs and use it
+		rm -rf ${IPSET_DATA_DIR_BACKUP}
+		rm -f ${IPSET_DATA_COMPAT_BACKUP}
+	else
+		# If sets weren't cleanly saved, restore from backups
+		[ -d ${IPSET_DATA_DIR_BACKUP} ] && rm -rf ${IPSET_DATA_DIR} && mv -Tf ${IPSET_DATA_DIR_BACKUP} ${IPSET_DATA_DIR}
+		[ -f ${IPSET_DATA_COMPAT_BACKUP} ] && rm -f ${IPSET_DATA_COMPAT} && mv -Tf ${IPSET_DATA_COMPAT_BACKUP} ${IPSET_DATA_COMPAT}
+	fi
+
+	if [ ! -d ${IPSET_DATA_DIR} ] && [ ! -f ${IPSET_DATA_COMPAT} ]; then
+		info "No existing configuration available, none loaded"
+		touch ${IPSET_RUN}
+		return
+	fi
+
+	# Merge all sets into temporary file
+	merged="$(mktemp -q /tmp/ipset.XXXXXX)"
+	CLEAN_FILES="${CLEAN_FILES} ${merged}"
+	chmod 600 "${merged}"
+	set +f
+	if [ -d ${IPSET_DATA_DIR} ]; then
+		# Copy create commands from each saved set first, then the rest:
+		# list:set entries depend on other sets, so make sure they all
+		# get created first
+		for f in "${IPSET_DATA_DIR}"/*; do
+			[ "${f}" = "${IPSET_DATA_DIR}/*" ] && break
+			[ -f "${f}" ] || continue
+			grep '^c' "${f}" >> "${merged}"
+		done
+		for f in "${IPSET_DATA_DIR}"/*; do
+			[ "${f}" = "${IPSET_DATA_DIR}/*" ] && break
+			[ -f "${f}" ] || continue
+			grep -v '^c' "${f}" >> "${merged}"
+		done
+	fi
+	set -f
+	[ -f ${IPSET_DATA_COMPAT} ] && cat ${IPSET_DATA_COMPAT} >> "${merged}"
+
+	# Drop sets that aren't in saved data, mark conflicts with existing sets
+	conflicts=""
+	IFS="
+"
+	for set in $(${IPSET_BIN} list -n -t); do
+		grep -q "^create ${set} " "${merged}" && conflicts="${conflicts}|${set}" && continue
+
+		# We can't destroy the set if it's in use, flush it instead
+		if ! ${IPSET_BIN} destroy "${set}" 2>/dev/null; then
+			${IPSET_BIN} flush "${set}"
+		fi
+	done
+	unset IFS
+	conflicts="${conflicts#|*}"
+
+	# Common case: if we have no conflicts, just restore in one shot
+	if [ -z "${conflicts}" ]; then
+		if ! ipset_restore "${merged}"; then
+			err "Failed to restore configured sets"
+			exit 1
+		fi
+		rm "${merged}"
+		CLEAN_FILES="${CLEAN_FILES%* ${merged}}"
+		touch ${IPSET_RUN}
+		return
+	fi
+
+	# Find a salt for md5sum that makes names of saved sets unique
+	salt=0
+	while true; do
+		unique=1
+		IFS="
+"
+		for set in $(${IPSET_BIN} list -n -t); do
+			if grep -q "^create $(echo "${salt}${set}" | md5sum | head -c31) " "${merged}"; then
+				unique=0
+				break
+			fi
+		done
+		unset IFS
+		[ ${unique} -eq 1 ] && break
+		salt=$((salt + 1))
+	done
+
+	# Add sets, mangling names for conflicting sets
+	mangled="$(mktemp -q /tmp/ipset.XXXXXX)"
+	CLEAN_FILES="${CLEAN_FILES} ${mangled}"
+	chmod 600 "${mangled}"
+
+	cat "${merged}" > "${mangled}"
+	IFS='|'
+	for set in ${conflicts}; do
+		new_name=$(echo "${salt}${set}" | md5sum | head -c31)
+		echo "s/^(add|create) $set /\1 $new_name /"
+	done | sed -i -r -f - "${mangled}"
+	unset IFS
+	if ! ipset_restore "${mangled}"; then
+		err "Failed to restore configured sets"
+		exit 1
+	fi
+
+	rm "${mangled}"
+	CLEAN_FILES="${CLEAN_FILES%* ${mangled}}"
+
+	# Swap and delete old sets
+	IFS='|'
+	for set in ${conflicts}; do
+		mangled="$(echo "${salt}${set}" | md5sum | head -c31)"
+		if ! ${IPSET_BIN} swap "${set}" "${mangled}" 2>/dev/null; then
+			# This fails if set types are different: try to destroy
+			# existing set
+			if ! ${IPSET_BIN} destroy "${set}" 2>/dev/null; then
+				# Conflicting set is in use, we can only warn
+				# and flush the existing set
+				err "Cannot load set \"${set}\", set with same name and conflicting type in use"
+				${IPSET_BIN} flush "${set}"
+				${IPSET_BIN} destroy "${mangled}"
+			else
+				${IPSET_BIN} rename "${mangled}" "${set}"
+			fi
+		else
+			${IPSET_BIN} destroy "${mangled}"
+		fi
+	done
+	unset IFS
+
+	rm "${merged}"
+	CLEAN_FILES="${CLEAN_FILES%* ${merged}}"
+	touch ${IPSET_RUN}
+}
+
+cleanup() {
+	${IPSET_BIN} flush || err "Failed to flush sets"
+
+	# Try to destroy all sets at once. This will fail if some are in use,
+	# destroy all the other ones in that case
+	${IPSET_BIN} destroy 2>/dev/null && return
+	IFS="
+"
+	for set in $(${IPSET_BIN} list -n -t); do
+		if ! ${IPSET_BIN} destroy "${set}"; then
+			err "Failed to destroy set ${set}"
+		fi
+	done
+	unset IFS
+}
+
+stop() {
+	[ -f ${IPSET_RUN} ] || { info "Not running"; return 0; }
+	[ "${IPSET_SAVE_ON_STOP}" = "yes" ] && { save || err "Failed to save sets"; }
+
+	# Nothing to stop if the ip_set module is not loaded
+	lsmod | grep -q "^ip_set " || { info "Not running"; rm ${IPSET_RUN}; return 0; }
+
+	# If the xt_set module is in use, then iptables is using ipset, so
+	# refuse to stop the service
+	if mod="$(lsmod | grep ^xt_set)"; then
+		if [ "$(echo "${mod}" | tr -s ' ' | cut -d' ' -f3)" != "0" ]; then
+			err "Current iptables configuration requires ipset" && return 1
+		fi
+	fi
+
+	cleanup
+
+	rm ${IPSET_RUN}
+	return 0
+}
+
+lock
 case "$1" in
-    start)
-	start
-	RETVAL=$?
+start)
+	load
 	;;
-    stop)
-	check_can_unload || exit 1
-	[[ $IPSET_SAVE_ON_STOP = yes ]] && save
+stop)
 	stop
-	RETVAL=$?
-	[[ $RETVAL -eq 6 ]] && echo "${IPSET}: not running" && exit 0
 	;;
-    reload)
-	[[ $IPSET_SAVE_ON_RESTART = yes ]] && save
-	stop
-	RETVAL=$?
-	[[ $RETVAL -eq 6 ]] && echo "${IPSET}: not running" && exit 0
-	start
-	RETVAL=$?
+reload)
+	cleanup
+	load
 	;;
-    *)
-	echo "Usage: $IPSET {start|stop|reload}" >&2
+save)
+	save
+	;;
+*)
+	info "Usage: $0 {start|stop|reload|save}"
 	exit 1
 esac
 
-exit $RETVAL
+exit $?