- Reimplement $gif_interfaces as a variant of $cloned_interfaces.

Newly-configured systems should use $cloned_interfaces.

- Call clone_{up,down}() and ifnet_rename() in rc.d/netif {start,stop}.
  ifnet_rename() now accepts an interface name list as its argument.

- Add rc.d/netif clear.  The "clear" subcommand is basically equivalent to
  "stop" but it does not call clone_down().

- Add "ifname:sticky" keyword into $cloned_interfaces.  If :sticky is
  specified, the interface will not be destroyed in rc.d/netif stop.

- Add cloned_interfaces_sticky={YES,NO}.  This variable globally sets
  :sticky keyword above for all interfaces.  The default value is NO.
  When cloned_interfaces_sticky=YES, :nosticky keyword can be used to
  override it on per interface basis.

etc/network.subr

@@ -660,6 +660,11 @@ ipv4_down()
 	IFS="$_ifs"
 	for _inet in $inetList ; do
 		# get rid of extraneous line
+		case $_inet in
+		"")		break ;;
+		inet\ *)	;;
+		*)		continue ;;
+		esac
 		[ -z "$_inet" ] && break
 
 		_inet=`expr "$_inet" : '.*\(inet \([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}\).*'`
@@ -1192,18 +1197,62 @@ ifscript_down()
 #
 clone_up()
 {
-	local _prefix _list ifn
+	local _prefix _list ifn ifopt _iflist _n tmpargs
 	_prefix=
 	_list=
+	_iflist=$*
 
 	# create_args_IF
 	for ifn in ${cloned_interfaces}; do
+		# Parse ifn:ifopt.
+		OIFS=$IFS; IFS=:; set -- $ifn; ifn=$1; ifopt=$2; IFS=$OIFS
+		case $_iflist in
+		""|$ifn|$ifn\ *|*\ $ifn\ *|*\ $ifn)	;;
+		*)	continue ;;
+		esac
+		# Skip if ifn already exists.
+		if ${IFCONFIG_CMD} $ifn > /dev/null 2>&1; then
+			continue
+		fi
 		${IFCONFIG_CMD} ${ifn} create `get_if_var ${ifn} create_args_IF`
 		if [ $? -eq 0 ]; then
 			_list="${_list}${_prefix}${ifn}"
 			[ -z "$_prefix" ] && _prefix=' '
 		fi
 	done
+	if [ -n "$gif_interfaces" ]; then
+		warn "\$gif_interfaces is obsolete.  Use \$cloned_interfaces instead."
+	fi
+	for ifn in ${gif_interfaces}; do
+		# Parse ifn:ifopt.
+		OIFS=$IFS; IFS=:; set -- $ifn; ifn=$1; ifopt=$2; IFS=$OIFS
+		case $_iflist in
+		""|$ifn|$ifn\ *|*\ $ifn\ *|*\ $ifn)	;;
+		*)	continue ;;
+		esac
+		# Skip if ifn already exists.
+		if ${IFCONFIG_CMD} $ifn > /dev/null 2>&1; then
+			continue
+		fi
+		case $ifn in
+		gif[0-9]*)
+			${IFCONFIG_CMD} $ifn create
+		;;
+		*)
+			_n=$(${IFCONFIG_CMD} gif create)
+			${IFCONFIG_CMD} $_n name $ifn
+		;;
+		esac
+		if [ $? -eq 0 ]; then
+			_list="${_list}${_prefix}${ifn}"
+			[ -z "$_prefix" ] && _prefix=' '
+		fi
+		tmpargs=$(get_if_var $ifn gifconfig_IF)
+		eval ifconfig_${ifn}=\"tunnel \$tmpargs\"
+	done
+	if [ -n "${_list}" ]; then
+		echo "Created clone interfaces: ${_list}."
+	fi
 	debug "Cloned: ${_list}"
 }
 
@@ -1213,17 +1262,42 @@ clone_up()
 #
 clone_down()
 {
-	local _prefix _list ifn
+	local _prefix _list ifn ifopt _iflist _sticky
 	_prefix=
 	_list=
+	_iflist=$*
 
-	for ifn in ${cloned_interfaces}; do
+	: ${cloned_interfaces_sticky:=NO}
+	if checkyesno cloned_interfaces_sticky; then
+		_sticky=1
+	else
+		_sticky=0
+	fi
+	for ifn in ${cloned_interfaces} ${gif_interfaces}; do
+		# Parse ifn:ifopt.
+		OIFS=$IFS; IFS=:; set -- $ifn; ifn=$1; ifopt=$2; IFS=$OIFS
+		case $ifopt:$_sticky in
+		sticky:*)	continue ;;	# :sticky => not destroy
+		nosticky:*)	;;		# :nosticky => destroy
+		*:1)		continue ;;	# global sticky knob == 1
+		esac
+		case $_iflist in
+		""|$ifn|$ifn\ *|*\ $ifn\ *|*\ $ifn)	;;
+		*)	continue ;;
+		esac
+		# Skip if ifn does not exist.
+		if ! ${IFCONFIG_CMD} $ifn > /dev/null 2>&1; then
+			continue
+		fi
 		${IFCONFIG_CMD} -n ${ifn} destroy
 		if [ $? -eq 0 ]; then
 			_list="${_list}${_prefix}${ifn}"
 			[ -z "$_prefix" ] && _prefix=' '
 		fi
 	done
+	if [ -n "${_list}" ]; then
+		echo "Destroyed clone interfaces: ${_list}."
+	fi
 	debug "Destroyed clones: ${_list}"
 }
 
@@ -1347,32 +1421,6 @@ ng_create_one()
 	done
 }
 
-# gif_up
-#	Create gif(4) tunnel interfaces.
-gif_up()
-{
-	local i peers
-
-	for i in ${gif_interfaces}; do
-		peers=`get_if_var $i gifconfig_IF`
-		case ${peers} in
-		'')
-			continue
-			;;
-		*)
-			if expr $i : 'gif[0-9][0-9]*$' >/dev/null 2>&1; then
-				${IFCONFIG_CMD} $i create >/dev/null 2>&1
-			else
-				gif=`${IFCONFIG_CMD} gif create`
-				${IFCONFIG_CMD} $gif name $i
-			fi
-			${IFCONFIG_CMD} $i tunnel ${peers}
-			${IFCONFIG_CMD} $i up
-			;;
-		esac
-	done
-}
-
 # ng_fec_create ifn
 #	Configure Fast EtherChannel for interface $ifn. Returns 0 if
 #	FEC arguments were found and configured; returns !0 otherwise.
@@ -1470,15 +1518,15 @@ ipx_down()
 	return $_ret
 }
 
-# ifnet_rename
-#	Rename all requested interfaces.
+# ifnet_rename [ifname]
+#	Rename interfaces if ifconfig_IF_name is defined.
 #
 ifnet_rename()
 {
 	local _if _ifname
 
 	# ifconfig_IF_name
-	for _if in `${IFCONFIG_CMD} -l`; do
+	for _if in ${*:-$(${IFCONFIG_CMD} -l)}; do
 		_ifname=`get_if_var $_if ifconfig_IF_name`
 		if [ ! -z "$_ifname" ]; then
 			${IFCONFIG_CMD} $_if name $_ifname

etc/rc.d/netif

@@ -38,7 +38,8 @@ start_cmd="network_start"
 stop_cmd="network_stop"
 cloneup_cmd="clone_up"
 clonedown_cmd="clone_down"
-extra_commands="cloneup clonedown"
+clear_cmd="doclear"
+extra_commands="cloneup clonedown clear"
 cmdifn=
 
 set_rcvar_obsolete ipv6_enable ipv6_activate_all_interfaces
@@ -60,19 +61,16 @@ network_start()
 		# disable SIGINT (Ctrl-c) when running at startup
 		trap : 2
 
-		# Create cloned interfaces
-		clone_up
-
 		# Create Fast EtherChannel interfaces
 		fec_up
-
-		# Create IPv6<-->IPv4 tunnels
-		gif_up
-
-		# Rename interfaces.
-		ifnet_rename
 	fi
 
+	# Create cloned interfaces
+	clone_up $cmdifn
+
+	# Rename interfaces.
+	ifnet_rename $cmdifn
+
 	# Configure the interface(s).
 	network_common ifn_start
 
@@ -91,6 +89,18 @@ network_start()
 }
 
 network_stop()
+{
+	_clone_down=1
+	network_stop0 $*
+}
+
+doclear()
+{
+	_clone_down=
+	network_stop0 $*
+}
+
+network_stop0()
 {
 	local _if
 
@@ -101,6 +111,11 @@ network_stop()
 	# Deconfigure the interface(s)
 	network_common ifn_stop
 
+	# Destroy cloned interfaces
+	if [ -n "$_clone_down" ]; then
+		clone_down $cmdifn
+	fi
+
 	if [ -f /etc/rc.d/routing -a -n "$cmdifn" ] ; then
 		for _if in $cmdifn; do
 			/etc/rc.d/routing stop any $_if
@@ -142,6 +157,16 @@ network_common()
 	_fail=
 	_ok=
 	for ifn in ${_cooked_list}; do
+		# Skip if ifn does not exist.
+		case $_func in
+		ifn_stop)
+			if ! ${IFCONFIG_CMD} $ifn > /dev/null 2>&1; then
+				warn "$ifn does not exist.  Skipped."
+				_fail="${_fail} ${ifn}"
+				continue
+			fi
+		;;
+		esac
 		if ${_func} ${ifn} $2; then
 			_ok="${_ok} ${ifn}"
 			if ipv6if ${ifn}; then

share/man/man5/rc.conf.5

@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd July 12, 2013
+.Dd July 22, 2013
 .Dt RC.CONF 5
 .Os
 .Sh NAME
@@ -1651,11 +1651,33 @@ Further cloning arguments may be passed to the
 command for each interface by setting the
 .Va create_args_ Ns Aq Ar interface
 variable.
+If an interface name is specified with
+.Dq :sticky
+keyword,
+the interface will not be destroyed even when
+.Pa rc.d/netif
+script is invoked with
+.Dq stop
+argument.
+This is useful when reconfiguring the interface without destroying it.
 Entries in
 .Va cloned_interfaces
 are automatically appended to
 .Va network_interfaces
 for configuration.
+.It Va cloned_interfaces_sticky
+.Pq Vt bool
+This variable is to globally enable functionality of
+.Dq :sticky
+keyword in
+.Va cloned_interfaces
+for all interfaces.
+The default value is
+.Dq NO .
+Even if this variable is specified to
+.Dq YES ,
+.Dq :nosticky
+keyword can be used to override it on per interface basis.
 .It Va fec_interfaces
 .Pq Vt str
 Set to the list of
@@ -1685,6 +1707,8 @@ ifconfig_fec0="DHCP"
 .Ed
 .It Va gif_interfaces
 .Pq Vt str
+This variable is deprecated in favor of
+.Va cloned_interfaces .
 Set to the list of
 .Xr gif 4
 tunnel interfaces to configure on this host.