File: iface-bridge

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#!/bin/sh
#
#       OCF Resource Agent compliant iface-bridge script.
#
#       Implements network Bridge interface management
#
# Copyright (C) 2013 Red Hat, Inc.  All rights reserved.
# Author: Fabio M. Di Nitto <fdinitto@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
#

# TODO:
#       * Eventually improve bridge_check to verify all runtime
#         parameters. Is it really necessary?
#       * consider add support for advanced multicast timers tuning
#         sethashel       <bridge> <int>   set hash elasticity                   default 4
#         sethashmax      <bridge> <int>   set hash max                          default 512
#         setmclmc        <bridge> <int>   set multicast last member count       default 2, ?
#         setmcsqc        <bridge> <int>   set multicast startup query count     default 2, ?
#         setmclmi        <bridge> <time>  set multicast last member interval    default HZ
#         setmcmi         <bridge> <time>  set multicast membership interval     default 260 * HZ
#         setmcqpi        <bridge> <time>  set multicast querier interval        default 255 * HZ
#         setmcqi         <bridge> <time>  set multicast query interval          detault 125 * HZ
#         setmcqri        <bridge> <time>  set multicast query response interval default 10 * HZ
#         setmcqri        <bridge> <time>  set multicast startup query interval  default 125 * hZ / 4
#
#
#	OCF parameters are as below
#	OCF_RESKEY_bridge_name
#       OCF_RESKEY_bridge_slaves
#       OCF_RESKEY_bridge_ageing
#       OCF_RESKEY_port_hairpin
#       OCF_RESKEY_stp
#       OCF_RESKEY_stp_bridgeprio
#       OCF_RESKEY_stp_fd
#       OCF_RESKEY_stp_maxage
#       OCF_RESKEY_stp_hello
#       OCF_RESKEY_stp_pathcost
#       OCF_RESKEY_stp_portprio
#       OCF_RESKEY_multicast_router
#       OCF_RESKEY_multicast_snooping
#       OCF_RESKEY_multicast_querier
#       OCF_RESKEY_multicast_port_router
#

#######################################################################
# Initialization:

: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

# Defaults
OCF_RESKEY_stp_default=false
OCF_RESKEY_stp_fd_default=0
OCF_RESKEY_multicast_router_default=1
OCF_RESKEY_multicast_snooping_default=1
OCF_RESKEY_multicast_querier_default=0

: ${OCF_RESKEY_stp=${OCF_RESKEY_stp_default}}
: ${OCF_RESKEY_stp_fd=${OCF_RESKEY_stp_fd_default}}
: ${OCF_RESKEY_multicast_router=${OCF_RESKEY_multicast_router_default}}
: ${OCF_RESKEY_multicast_snooping=${OCF_RESKEY_multicast_snooping_default}}
: ${OCF_RESKEY_multicast_querier=${OCF_RESKEY_multicast_querier_default}}

# binaries
: ${BRCTL:=brctl}

#######################################################################

bridge_usage() {
	cat <<END
usage: $0 {start|stop|status|monitor|validate-all|meta-data}

Expects to have a fully populated OCF RA-compliant environment set.
END
}

bridge_meta_data() {
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="iface-bridge">
  <version>1.0</version>

  <longdesc lang="en">
    This resource manages Bridge network interfaces.
    It can add, remove, configure bridges and spanning-tree.
  </longdesc>

  <shortdesc lang="en">
    Manages Bridge network interfaces.
  </shortdesc>

  <parameters>
    <parameter name="bridge_name" unique="1" required="1">
      <longdesc lang="en">
        Define the name of the bridge (max 15 charaters).
      </longdesc>
      <shortdesc lang="en">
        Name of the bridge
      </shortdesc>
      <content type="string"/>
    </parameter>

    <parameter name="bridge_slaves" unique="1">
      <longdesc lang="en">
        Define the list of interfaces, space separated, to add to the bridge.
        The list can be empty.
      </longdesc>
      <shortdesc lang="en">
        Network interface
      </shortdesc>
      <content type="string"/>
    </parameter>

    <parameter name="bridge_ageing" unique="0">
      <longdesc lang="en">
        Set the ethernet (MAC) address ageing time in seconds.
      </longdesc>
      <shortdesc lang="en">
        MAC ageing in seconds.
      </shortdesc>
      <content type="integer"/>
    </parameter>

    <parameter name="port_hairpin" unique="0">
      <longdesc lang="en">
        Set hairpin forwarding mode.
        A list of ports that should have hairpin enabled
        can be specified using the following
        Example: eth0 eth1
      </longdesc>
      <shortdesc lang="en">
        Set hairpin forwarding mode.
      </shortdesc>
      <content type="string"/>
    </parameter>

    <parameter name="stp" unique="0">
      <longdesc lang="en">
        Enable or disable Spanning Tree Protocol on the bridge.
      </longdesc>
      <shortdesc lang="en">
        Spanning Tree Protocol
      </shortdesc>
      <content type="boolean" default="${OCF_RESKEY_stp_default}"/>
    </parameter>

    <parameter name="stp_bridgeprio" unique="0">
      <longdesc lang="en">
        Set the bridge's priority to defined value. The priority value is a
        number between  0  and 65535), and has no dimension. Lower priority values are
        preferred. The bridge with the lowest priority will be elected as root bridge.
      </longdesc>
      <shortdesc lang="en">
        Set the bridge's priority.
      </shortdesc>
      <content type="integer"/>
    </parameter>

    <parameter name="stp_fd" unique="0">
      <longdesc lang="en">
        Set the bridge forward delay (in seconds).
      </longdesc>
      <shortdesc lang="en">
        Set the bridge forward delay.
      </shortdesc>
      <content type="integer" default="${OCF_RESKEY_stp_fd_default}"/>
    </parameter>

    <parameter name="stp_maxage" unique="0">
      <longdesc lang="en">
        Set the bridge maximum message age (in seconds).
      </longdesc>
      <shortdesc lang="en">
        Set the bridge maximum message age.
      </shortdesc>
      <content type="integer"/>
    </parameter>

    <parameter name="stp_hello" unique="0">
      <longdesc lang="en">
        Set the bridge hello time (in seconds).
      </longdesc>
      <shortdesc lang="en">
        Set the bridge hello time.
      </shortdesc>
      <content type="integer"/>
    </parameter>

    <parameter name="stp_pathcost" unique="0">
      <longdesc lang="en">
        Set the port cost. This is a dimensionless metric.
        A list of port/cost can be specified using the following
        format: slave cost slave cost.
        Example: eth0 100 eth1 1000
      </longdesc>
      <shortdesc lang="en">
        Set the port cost.
      </shortdesc>
      <content type="string"/>
    </parameter>

    <parameter name="stp_portprio" unique="0">
      <longdesc lang="en">
        Set the port priority. This is a number between 0 and 63.
        $BRCTL man page reports a value between 0 and 255, but
        tests show a limit of 63 on a live system.
        This metric is used in the designated port and root port
        selection algorithms.
        A list of port/priority can be specified using the following
        format: slave cost slave cost.
        Example: eth0 10 eth1 60
      </longdesc>
      <shortdesc lang="en">
        Set the port priority.
      </shortdesc>
      <content type="string"/>
    </parameter>

    <parameter name="multicast_router" unique="0">
      <longdesc lang="en">
        Enable or disable multicast routing on the bridge.
      </longdesc>
      <shortdesc lang="en">
        Enable or disable multicast routing.
      </shortdesc>
      <content type="boolean" default="${OCF_RESKEY_multicast_router_default}"/>
    </parameter>

    <parameter name="multicast_snooping" unique="0">
      <longdesc lang="en">
        Enable or disable multicast snooping on the bridge.
      </longdesc>
      <shortdesc lang="en">
        Enable or disable multicast snooping.
      </shortdesc>
      <content type="boolean" default="${OCF_RESKEY_multicast_snooping_default}"/>
    </parameter>

    <parameter name="multicast_port_router" unique="0">
      <longdesc lang="en">
        Enable or disable a port from the multicast router.
        Kernel enables all port by default.
        A list of port can be specified using the following
        format: slave 0|1 slave 0|1.
        Example: eth0 1 eth1 0
      </longdesc>
      <shortdesc lang="en">
        Enable or disable a port from the multicast router.
      </shortdesc>
      <content type="string"/>
    </parameter>
  </parameters>

  <actions>
    <action name="start"        timeout="30s" />
    <action name="stop"         timeout="20s" />
    <action name="status"       timeout="20s" depth="0" interval="10s" />
    <action name="monitor"      timeout="20s" depth="0" interval="10s" />
    <action name="meta-data"    timeout="5s" />
    <action name="validate-all" timeout="20s" />
  </actions>
</resource-agent>
END
}

# commodity function
# split_string eth0 100 eth1 1000 eth2 100
# eth0 100
# eth1 1000
# eth2 100

split_string() {
	while [ -n "$1" ]; do
		echo $1 $2
		shift && shift
	done
}

# check if the interface is admin up/down

iface_is_up() {
	if ! $IP2UTIL -o link show $1 | \
	    sed -e 's#.*<##g' -e 's#>.*##' -e 's#LOWER_UP##g' | \
	    grep -q UP; then
		return 1
	fi
	return 0
}

# check if the slaves have link layer up/down
# see kernel network documentation on meaning of LOWER_UP flag
# for more in depth explanation on how it works
# NOTE: this check is not reliable in virt environment
# since interfaces are always LOWER_UP. There is no way
# from the guest to know if the host has disconnected somehow

iface_lower_is_up() {
	if ! $IP2UTIL -o link show $1 | \
	    grep -q LOWER_UP; then
		return 1
	fi
	return 0
}

# wrapup function to check if any interface defined in
# option lists is a slave

iface_is_slave() {
	for slave in $OCF_RESKEY_bridge_slaves; do
		if [ "$1" = "$slave" ]; then
			return 0
		fi	
	done
	return 1
}

bridge_validate() {
	check_binary $BRCTL
	check_binary $IP2UTIL

	if [ -z "$OCF_RESKEY_bridge_name" ]; then
		ocf_log err "Invalid OCF_RESKEY_bridge_name: value cannot be empty"
		return 1
	fi

	# the echo .. is the equivalent of strlen in bash
	#
	# /usr/include/linux/if.h:#define IFNAMSIZ        16
	# needs to include 0 byte end string

	if [ "${#OCF_RESKEY_bridge_name}" -gt 15 ]; then
		ocf_log err "Invalid OCF_RESKEY_bridge_name: name is too long"
		return 1
	fi

	if [ ! -d "/sys/class/net" ]; then
		ocf_log err "Unable to find sysfs network class in /sys"
		return 1
	fi

	for slave in $OCF_RESKEY_bridge_slaves; do
		if [ ! -e "/sys/class/net/$slave" ]; then
			ocf_log err "Invalid OCF_RESKEY_bridge_slaves: $slave does not exists"
			return 1
		fi
	done

	# check if declared harpin ports are slaves
	for hairpin in $OCF_RESKEY_port_hairpin; do
		if ! iface_is_slave $hairpin; then
			ocf_log err "Invalid OCF_RESKEY_port_hairpin: $hairpin is not listed in OCF_RESKEY_bridge_slaves"
			return 1
		fi
	done

	if [ -n "$OCF_RESKEY_bridge_ageing" ]; then
		if ! ocf_is_decimal "$OCF_RESKEY_bridge_ageing"; then
			ocf_log err "Invalid OCF_RESKEY_bridge_ageing: must be a decimal value (0 or greater)"
			return 1
		fi
	fi

	# OCF_RESKEY_stp_fd needs special handling as it can be 0 or greater
	# but only when configured before OCF_RESKEY_stp.
	# if enabled after OCF_RESKEY_stp with stp=true the value range is
	# different. It is not clear from the man page or brctl documentation
	# what the range is ahead of time.
	if [ -n "$OCF_RESKEY_stp_fd" ]; then
		if ! ocf_is_decimal "$OCF_RESKEY_stp_fd" || \
		   [ "$OCF_RESKEY_stp_fd" -lt 0 ]; then
			ocf_log err "Invalid OCF_RESKEY_stp_fd: must be a decimal value (0 or greater)"
			return 1
		fi
	fi

	if ocf_is_true "$OCF_RESKEY_stp"; then

		if [ -n "$OCF_RESKEY_stp_bridgeprio" ]; then
			if ! ocf_is_decimal "$OCF_RESKEY_stp_bridgeprio" || \
			   [ "$OCF_RESKEY_stp_bridgeprio" -gt 65535 ]; then
				ocf_log err "Invalid OCF_RESKEY_stp_bridgeprio: must be a decimal value between 0 and 65535 included"
				return 1
			fi
		fi

		if [ -n "$OCF_RESKEY_stp_hello" ]; then
			if ! ocf_is_decimal "$OCF_RESKEY_stp_hello"; then
				ocf_log err "Invalid OCF_RESKEY_stp_hello: must be a decimal value (0 or greater)"
				return 1
			fi
		fi

		if [ -n "$OCF_RESKEY_stp_maxage" ]; then
			if ! ocf_is_decimal "$OCF_RESKEY_stp_maxage"; then
				ocf_log err "Invalid OCF_RESKEY_stp_maxage: must be a decimal value (0 or greater)"
				return 1
			fi
		fi

		if [ -n "$OCF_RESKEY_stp_pathcost" ]; then
			split_string $OCF_RESKEY_stp_pathcost | { while read iface cost; do
					if ! iface_is_slave $iface; then
						ocf_log err "Invalid OCF_RESKEY_stp_pathcost: $iface is not listed in OCF_RESKEY_bridge_slaves"
						return 1
					fi

					if ! ocf_is_decimal $cost; then
						ocf_log err "Invalid OCF_RESKEY_stp_pathcost: cost must be a decimal value (0 or great)"
						return 1
					fi
				done
			}
		fi

		if [ -n "$OCF_RESKEY_stp_portprio" ]; then
			split_string $OCF_RESKEY_stp_portprio | { while read iface prio; do
					if ! iface_is_slave $iface; then
						ocf_log err "Invalid OCF_RESKEY_stp_portprio: $iface is not listed in OCF_RESKEY_bridge_slaves"
						return 1
					fi

					if ! ocf_is_decimal $prio || \
					   [ "$prio" -gt "63" ]; then
						ocf_log err "Invalid OCF_RESKEY_stp_portprio: priority must be a decimal value between 0 and 63 included"
						return 1
					fi
				done
			}
		fi

	fi

	if [ -n "$OCF_RESKEY_multicast_port_router" ]; then
		split_string $OCF_RESKEY_multicast_port_router | { while read iface mcport; do
				if ! iface_is_slave $iface; then
					ocf_log err "Invalid OCF_RESKEY_multicast_port_router: $iface is not listed in OCF_RESKEY_bridge_slaves"
					return 1
				fi

				if ! ocf_is_decimal $mcport || \
				   [ "$mcport" -gt "1" ]; then
					ocf_log err "Invalid OCF_RESKEY_multicast_port_router: valuer must be 0 (disabled) or 1 (enabled)"
					return 1
				fi
			done
		}
	fi

	return 0
}

bridge_check() {
	if [ -e "/sys/class/net/$OCF_RESKEY_bridge_name" ]; then
		if [ ! -e "$HA_RSCTMP/iface-bridge.$OCF_RESKEY_bridge_name" ]; then
			return $OCF_ERR_GENERIC
		fi
	else
		if [ -e "$HA_RSCTMP/iface-bridge.$OCF_RESKEY_bridge_name" ]; then
			error="$(rm -f "$HA_RSCTMP/iface-bridge.$OCF_RESKEY_bridge_name" 2>&1)"
			if [ "$?" != "0" ]; then
				ocf_log err "Unable to remove stale lock file for bridge $OCF_RESKEY_bridge_name: $error"
				return $OCF_ERR_GENERIC
			fi
		fi
		return $OCF_NOT_RUNNING
	fi

	# we check if all slaves are still part of the bridge
	for slave in $OCF_RESKEY_bridge_slaves; do
		if [ ! -e "/sys/class/net/$OCF_RESKEY_bridge_name/brif/$slave" ]; then
			ocf_log err "Interface $slave is not part of the bridge $OCF_RESKEY_bridge_name"
			return $OCF_ERR_GENERIC
		fi
		if ! iface_is_up $slave; then
			ocf_log err "Interface $slave of the bridge $OCF_RESKEY_bridge_name is administratively down"
			return $OCF_ERR_GENERIC
		fi
	done

	# check if bridge is still "UP"
	# is there a cleaner way?

	if ! iface_is_up $OCF_RESKEY_bridge_name; then
		ocf_log err "Bridge $OCF_RESKEY_bridge_name is administratively down"
		return $OCF_ERR_GENERIC
	fi

	if ! iface_lower_is_up $OCF_RESKEY_bridge_name; then
		ocf_log err "Bridge $OCF_RESKEY_bridge_name has no active link-layer slaves"
		return $OCF_ERR_GENERIC
	fi

	return $OCF_SUCCESS
}

# we need a simpler stop version to clean after us if start fails
# without involving any error checking
# rolling back in case of failure is otherwise complex

bridge_force_stop() {
	$IP2UTIL link set dev "$OCF_RESKEY_bridge_name" down 2>&1
	for slave in $OCF_RESKEY_bridge_slaves; do
		$IP2UTIL link set dev "$slave" down 2>&1
	done
	$BRCTL delbr "$OCF_RESKEY_bridge_name" 2>&1
	rm -f "$HA_RSCTMP/iface-bridge.$OCF_RESKEY_bridge_name" 2>&1
}

bridge_start() {
	# check if the bridge already exists
	bridge_check
	ret=$?
	if [ "$ret" != "$OCF_NOT_RUNNING" ]; then
		return $ret
	fi

	# create the bridge
	error="$($BRCTL addbr "$OCF_RESKEY_bridge_name" 2>&1)"
	if [ "$?" != "0" ]; then
		ocf_log err "Unable to create bridge $OCF_RESKEY_bridge_name: $error"
		return $OCF_ERR_GENERIC
	fi

	# add slaves if configured
	for slave in $OCF_RESKEY_bridge_slaves; do
		error="$($BRCTL addif "$OCF_RESKEY_bridge_name" "$slave" 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to add interface $slave to bridge $OCF_RESKEY_bridge_name: $error"
			return $OCF_ERR_GENERIC
		fi
	done

	# set haripin forward mode
	for hairpin in $OCF_RESKEY_port_hairpin; do
		error="$($BRCTL hairpin "$OCF_RESKEY_bridge_name" "$hairpin" on 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to set hairpin on for interface $hairpin to bridge $OCF_RESKEY_bridge_name: $error"
			return $OCF_ERR_GENERIC
		fi
	done

	# set bridge ageing
	if [ -n "$OCF_RESKEY_bridge_ageing" ]; then
		error="$($BRCTL setageing "$OCF_RESKEY_bridge_name" "$OCF_RESKEY_bridge_ageing" 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to set bridge $OCF_RESKEY_bridge_name ageing to $OCF_RESKEY_bridge_ageing: $error"
			return $OCF_ERR_GENERIC
		fi
	fi

	# OCF_RESKEY_stp_fd needs special handling as it can be 0 or greater
	# but only when configured before OCF_RESKEY_stp.
	# if enabled after OCF_RESKEY_stp with stp=true the value range is
	# different. It is not clear from the man page or brctl documentation
	# what the range is ahead of time.
	if [ -n "$OCF_RESKEY_stp_fd" ]; then
		error="$($BRCTL setfd "$OCF_RESKEY_bridge_name" "$OCF_RESKEY_stp_fd" 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to set bridge forward delay $OCF_RESKEY_stp_fd on bridge $OCF_RESKEY_bridge_name : $error"
			return $OCF_ERR_GENERIC
		fi
	fi

	# enable/disable spanning tree protocol
	if ocf_is_true "$OCF_RESKEY_stp"; then
		error="$($BRCTL stp "$OCF_RESKEY_bridge_name" on 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to enable STP on bridge $OCF_RESKEY_bridge_name : $error"
			return $OCF_ERR_GENERIC
		fi

		# set bridge priority
		if [ -n "$OCF_RESKEY_stp_bridgeprio" ]; then
			error="$($BRCTL setbridgeprio "$OCF_RESKEY_bridge_name" "$OCF_RESKEY_stp_bridgeprio" 2>&1)"
			if [ "$?" != "0" ]; then
				ocf_log err "Unable to set bridge priority $OCF_RESKEY_stp_bridgeprio on bridge $OCF_RESKEY_bridge_name : $error"
				return $OCF_ERR_GENERIC
			fi
		fi

		# set hello timer
		if [ -n "$OCF_RESKEY_stp_hello" ]; then
			error="$($BRCTL sethello "$OCF_RESKEY_bridge_name" "$OCF_RESKEY_stp_hello" 2>&1)"
			if [ "$?" != "0" ]; then
				ocf_log err "Unable to set bridge hello timer $OCF_RESKEY_stp_hello on bridge $OCF_RESKEY_bridge_name : $error"
				return $OCF_ERR_GENERIC
			fi
		fi


		# set max age
		if [ -n "$OCF_RESKEY_stp_maxage" ]; then
			error="$($BRCTL setmaxage "$OCF_RESKEY_bridge_name" "$OCF_RESKEY_stp_maxage" 2>&1)"
			if [ "$?" != "0" ]; then
				ocf_log err "Unable to set bridge max age $OCF_RESKEY_stp_maxage on bridge $OCF_RESKEY_bridge_name : $error"
				return $OCF_ERR_GENERIC
			fi
		fi

		# set path cost per port
		if [ -n "$OCF_RESKEY_stp_pathcost" ]; then
			split_string $OCF_RESKEY_stp_pathcost | { while read iface cost; do
				error="$($BRCTL setpathcost "$OCF_RESKEY_bridge_name" "$iface" "$cost" 2>&1)"
				if [ "$?" != "0" ]; then
					ocf_log err "Unable to set pathcost $cost for interface $iface on bridge $OCF_RESKEY_bridge_name : $error"
					return $OCF_ERR_GENERIC
				fi
				done
			}
		fi

		# set port priority per port
		if [ -n "$OCF_RESKEY_stp_portprio" ]; then
			split_string $OCF_RESKEY_stp_portprio | { while read iface prio; do
				error="$($BRCTL setportprio "$OCF_RESKEY_bridge_name" "$iface" "$prio" 2>&1)"
				if [ "$?" != "0" ]; then
					ocf_log err "Unable to set portprio $prio for interface $iface on bridge $OCF_RESKEY_bridge_name : $error"
					return $OCF_ERR_GENERIC
				fi
				done
			}
		fi
	else
		# stp off is default via brctl/kernel interface but it
		# is best to force it since we don't know if default
		# has changed across kernel releases
		error="$($BRCTL stp "$OCF_RESKEY_bridge_name" off 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to disable STP on bridge $OCF_RESKEY_bridge_name : $error"
			return $OCF_ERR_GENERIC
		fi
	fi

	# set slaves up
	for slave in $OCF_RESKEY_bridge_slaves; do
		error="$($IP2UTIL link set dev "$slave" up 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to set slave $slave for bridge $OCF_RESKEY_bridge_name up: $error"
			return $OCF_ERR_GENERIC
		fi
	done

	# set the bridge up
	error="$($IP2UTIL link set dev "$OCF_RESKEY_bridge_name" up 2>&1)"
	if [ "$?" != "0" ]; then
		ocf_log err "Unable to set bridge $OCF_RESKEY_bridge_name up: $error"
		return $OCF_ERR_GENERIC
	fi

	# multicast operations can only be executed after the bridge is up
	# and configured.

	# enable/disable multicast router
	if ocf_is_true "$OCF_RESKEY_multicast_router"; then
		mcrouter=1
	else
		mcrouter=0
	fi
	if [ -e "/sys/class/net/$OCF_RESKEY_bridge_name/bridge/multicast_router" ]; then
		error="$(echo $mcrouter > /sys/class/net/$OCF_RESKEY_bridge_name/bridge/multicast_router 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to set OCF_RESKEY_multicast_router for bridge $OCF_RESKEY_bridge_name: $error"
			return $OCF_ERR_GENERIC
		fi
	else
		ocf_log warn "Unable to set multicast router on bridge $OCF_RESKEY_bridge_name because kernel does not support it"
	fi

	# enable/disable multicast snoopint
	if ocf_is_true "$OCF_RESKEY_multicast_snooping"; then
		mcsnooping=1
	else
		mcsnooping=0
	fi
	if [ -e "/sys/class/net/$OCF_RESKEY_bridge_name/bridge/multicast_snooping" ]; then
		error="$(echo $mcsnooping > /sys/class/net/$OCF_RESKEY_bridge_name/bridge/multicast_snooping 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to set OCF_RESKEY_multicast_snooping for bridge $OCF_RESKEY_bridge_name: $error"
			return $OCF_ERR_GENERIC
		fi
	else
		ocf_log warn "Unable to set multicast snooping on bridge $OCF_RESKEY_bridge_name because kernel does not support it"
	fi

	# enable/disable multicast querier
	if ocf_is_true "$OCF_RESKEY_multicast_querier"; then
		mcquerier=1
	else
		mcquerier=0
	fi
	if [ -e "/sys/class/net/$OCF_RESKEY_bridge_name/bridge/multicast_querier" ]; then
		error="$(echo $mcquerier > /sys/class/net/$OCF_RESKEY_bridge_name/bridge/multicast_querier 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to set OCF_RESKEY_multicast_querier for bridge $OCF_RESKEY_bridge_name: $error"
			return $OCF_ERR_GENERIC
		fi
	else
		ocf_log warn "Unable to set multicast querier on bridge $OCF_RESKEY_bridge_name because kernel does not support it"
	fi

	# set multicast router per port
	if [ -n "$OCF_RESKEY_multicast_port_router" ]; then
		split_string $OCF_RESKEY_multicast_port_router | { while read iface mcport; do
			if [ -e "/sys/class/net/$iface/brport/multicast_router" ]; then
				error="$(echo $mcport > /sys/class/net/$iface/brport/multicast_router 2>&1)"
				if [ "$?" != "0" ]; then
					ocf_log err "Unable to set OCF_RESKEY_multicast_port_router $mcport for interface $iface on bridge $OCF_RESKEY_bridge_name : $error"
					return $OCF_ERR_GENERIC
				fi
			else
				ocf_log warn "Unable to set multicast port router on bridge $OCF_RESKEY_bridge_name because kernel does not support it"
			fi
			done
		}
	fi

	error="$(touch "$HA_RSCTMP/iface-bridge.$OCF_RESKEY_bridge_name")"
	if [ "$?" != "0" ]; then
		ocf_log err "Unable to write lock file for bridge $OCF_RESKEY_bridge_name: $error"
		return $OCF_ERR_GENERIC
	fi

	return $OCF_SUCCESS
}

bridge_stop() {
	bridge_check
	ret=$?
	if [ "$ret" = "$OCF_NOT_RUNNING" ]; then
		return $OCF_SUCCESS
	fi
	if [ "$ret" != "$OCF_SUCCESS" ]; then
		return $ret
	fi

	# set bridge down
	error="$($IP2UTIL link set dev "$OCF_RESKEY_bridge_name" down 2>&1)"
	if [ "$?" != "0" ]; then
		ocf_log err "Unable to set bridge $OCF_RESKEY_bridge_name down: $error"
		return $OCF_ERR_GENERIC
	fi

	# set slaves down
	for slave in $OCF_RESKEY_bridge_slaves; do
		error="$($IP2UTIL link set dev "$slave" down 2>&1)"
		if [ "$?" != "0" ]; then
			ocf_log err "Unable to set slave $slave for bridge $OCF_RESKEY_bridge_name down: $error"
			return $OCF_ERR_GENERIC
		fi
	done

	# delete bridge
	error="$($BRCTL delbr "$OCF_RESKEY_bridge_name" 2>&1)"
	if [ "$?" != "0" ]; then
		ocf_log err "Unable to delete bridge $OCF_RESKEY_bridge_name: $error"
		return $OCF_ERR_GENERIC
	fi

	error="$(rm -f "$HA_RSCTMP/iface-bridge.$OCF_RESKEY_bridge_name" 2>&1)"
	if [ "$?" != "0" ]; then
		ocf_log err "Unable to remove lock file for bridge $OCF_RESKEY_bridge_name: $error"
		return $OCF_ERR_GENERIC
	fi

	return $OCF_SUCCESS
}

case $__OCF_ACTION in
	meta-data)
		bridge_meta_data
		exit $OCF_SUCCESS
	;;
	usage|help)
		bridge_usage
		exit $OCF_SUCCESS
	;;
esac

if [ ! -d "$HA_RSCTMP" ]; then
	ocf_log debug "$HA_RSCTMP not found, we are probably being executed manually"
	mkdir -p "$HA_RSCTMP"
fi

if [ -n "$__OCF_ACTION" ] && ! bridge_validate; then
	exit $OCF_ERR_CONFIGURED
fi

case $__OCF_ACTION in
	start|stop)
		if ! ocf_is_root; then
			ocf_log err "You must be root for $__OCF_ACTION operation."
			exit $OCF_ERR_PERM
		fi
	;;
esac

case $__OCF_ACTION in
	start)
		bridge_start
		ret=$?
		if [ "$ret" != "$OCF_SUCCESS" ]; then
			bridge_force_stop
		fi
		exit $ret
	;;
	stop)
		bridge_stop
		exit $?
	;;
	status|monitor)
		bridge_check
		exit $?
	;;
	validate-all)
		# bridge_validate above does the trick
	;;
	*)
		bridge_usage
		exit $OCF_ERR_UNIMPLEMENTED
	;;
esac
# vi:sw=4:ts=8: