Add macvlan support

X-Gentoo-Bug: 384029
X-Gentoo-Bug-URL: http://bugs.gentoo.org/show_bug.cgi?id=384029

doc/net.example.Linux.in

@@ -581,6 +581,18 @@
 # NOTE: depend functions only work in /etc/conf.d/net
 # and not in profile configs such as /etc/conf.d/net.foo
 
+# MAC-VLAN support
+# The following configuration can be used to create a new interface 'macvlan0'
+# linked to 'eth0'
+#macvlan_macvlan0="eth0"
+
+# MAC-VLAN mode (private, vepa, bridge, passtru)
+#mode_macvlan0="private"
+
+# IP address, MAC address, ... are configured as a normal interface
+#config_macvlan0="192.168.20.20/24"
+#mac_macvlan0="00:50:06:20:20:20"
+
 #-----------------------------------------------------------------------------
 # Bonding
 # For link bonding/trunking on 2.4 kernels, or kernels without sysfs

net/Makefile

@@ -13,7 +13,7 @@ SRCS-Linux=	iwconfig.sh.in
 INC-Linux=	adsl.sh apipa.sh arping.sh bonding.sh br2684ctl.sh bridge.sh \
 		ccwgroup.sh clip.sh ethtool.sh iproute2.sh ifplugd.sh ip6to4.sh \
 		ipppd.sh iwconfig.sh netplugd.sh pppd.sh pump.sh tuntap.sh udhcpc.sh \
-		vlan.sh
+		vlan.sh macvlan.sh
 
 SRCS-NetBSD=
 INC-NetBSD=	ifwatchd.sh

net/macvlan.sh

@@ -0,0 +1,69 @@
+# 2011-09-22	Stef Simoens <stef@bgs.org>
+#		based on vlan.sh & tuntap.sh
+# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
+# All rights reserved. Released under the 2-clause BSD license.
+
+_ip()
+{
+	if [ -x /bin/ip ]; then
+		echo /bin/ip
+	else
+		echo /sbin/ip
+	fi
+}
+
+macvlan_depend()
+{
+	program $(_ip)
+	after interface
+	before dhcp macchanger
+}
+
+_is_macvlan()
+{
+	[ -n "$(export RC_SVCNAME="net.${IFACE}"; service_get_value macvlan)" ]
+}
+
+_check_macvlan()
+{
+	if [ ! -d /sys/module/macvlan ]; then
+		modprobe macvlan
+		if [ ! -d /sys/module/macvlan ]; then
+			eerror "MAC-VLAN support is not present in this kernel"
+			return 1
+		fi
+	fi
+}
+
+macvlan_pre_start()
+{
+	# MAC-VLAN needs an existing interface to link to
+	local macvlan=
+	eval macvlan=\$macvlan_${IFVAR}
+	[ -z "${macvlan}" ] && return 0
+
+	_check_macvlan || return 1
+
+	# optional mode, default to "private"
+	local mode=
+	eval mode=\$mode_${IFVAR}
+	[ -z "${mode}" ] && mode="private"
+
+	ebegin "Creating MAC-VLAN ${IFACE} to ${macvlan}"
+	e="$(ip link add link "${macvlan}" name "${IFACE}" type macvlan mode "${mode}" 2>&1 1>/dev/null)"
+	if [ -n "${e}" ]; then
+		eend 1 "${e}"
+	else
+		eend 0 && service_set_value macvlan "${macvlan}"
+	fi
+}
+
+
+macvlan_post_stop()
+{
+	_is_macvlan || return 0
+
+	ebegin "Removing MAC-VLAN ${IFACE}"
+	ip link delete "${IFACE}" type macvlan >/dev/null
+	eend $?
+}