openrc/net.Linux/vlan.sh

# Copyright 2007 Roy Marples
# All rights reserved

# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

vlan_depend() {
	program /sbin/vconfig
	after interface
	before dhcp
}

_config_vars="$_config_vars vlans"

_is_vlan() {
	[ ! -d /proc/net/vlan ] && return 1
	[ -e /proc/net/vlan/"${IFACE}" ] && return 0
	grep -Eq "^${IFACE}[[:space:]]+" /proc/net/vlan/config
}

_get_vlans() {
	[ -e /proc/net/vlan/config ] || return 1
	sed -n -e 's/^\(.*[0-9]\) \(.* \) .*'"${IFACE}"'$/\1/p' /proc/net/vlan/config
}

_check_vlan() {
	if [ ! -d /proc/net/vlan ]; then
		modprobe 8021q
		if [ ! -d /proc/net/vlan ]; then
			eerror "VLAN (802.1q) support is not present in this kernel"
			return 1
		fi
	fi
}

vlan_pre_start() {
	local vc="$(_get_array "vconfig_${IFVAR}")"
	[ -z "${vc}" ] && return 0

	_check_vlan || return 1
	_exists || return 1

	local v= x= e=
	local IFS="$__IFS"
	for v in ${vc}; do
		unset IFS
		case "${v}" in
			set_name_type" "*) x=${v};;
			*)
				set -- ${v}
				x="$1 ${IFACE}"
				shift
				x="${x} $@"
				;;
		esac

		e="$(vconfig ${x} 2>&1 1>/dev/null)"
		[ -z "${e}" ] && continue
		eerror "${e}"
		return 1
	done
}

vlan_post_start() {
	local vlans=
	eval vlans=\$vlans_${IFACE}
	[ -z "${vlans}" ] && return 0
	
	_check_vlan || return 1
	_exists || return 1

	local vlan= e= s=
	for vlan in ${vlans}; do
		einfo "Adding VLAN ${vlan} to ${IFACE}"
		e="$(vconfig add "${IFACE}" "${vlan}" 2>&1 1>/dev/null)"
		if [ -n "${e}" ]; then
			eend 1 "${e}"
			continue
		fi

		# We may not want to start the vlan ourselves
		eval s=\$vlan_start_${IFVAR}
		yesno ${s:-yes} || continue

		# We need to work out the interface name of our new vlan id
		local ifname="$( \
			sed -n -e 's/^\([^[:space:]]*\) *| '"${vlan}"' *| .*'"${iface}"'$/\1/p' \
			/proc/net/vlan/config )"
		mark_service_started "net.${ifname}"
		(
			export SVCNAME="net.${ifname}"
			start	
		) || mark_service_stopped "net.${ifname}"
	done
	
	return 0
}

vlan_post_stop() {
	local vlan=

	for vlan in $(_get_vlans); do
		einfo "Removing VLAN ${vlan##*.} from ${IFACE}"
		(
			export SVCNAME="net.${vlan}"
			stop
		) && {
			mark_service_stopped "net.${vlan}"
			vconfig rem "${vlan}" >/dev/null
		}
	done

	return 0
}

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