resource-agents 1:4.1.0~rc1-1ubuntu1 / usr / lib / ocf / resource.d / heartbeat / iSCSITarget

#!/bin/bash
#
#
#     iSCSITarget OCF RA. Exports and manages iSCSI targets.
#
#   (c) 2009-2010 Florian Haas, Dejan Muhamedagic,
#                 and Linux-HA contributors
#
# 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.
#

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

# Defaults
# Set a default implementation based on software installed
if have_binary ietadm; then
	OCF_RESKEY_implementation_default="iet"
elif have_binary tgtadm; then
	OCF_RESKEY_implementation_default="tgt"
elif have_binary lio_node; then
	OCF_RESKEY_implementation_default="lio"
elif have_binary targetcli; then
	OCF_RESKEY_implementation_default="lio-t"
fi
: ${OCF_RESKEY_implementation=${OCF_RESKEY_implementation_default}}

# Listen on 0.0.0.0:3260 by default
OCF_RESKEY_portals_default="0.0.0.0:3260"
: ${OCF_RESKEY_portals=${OCF_RESKEY_portals_default}}

# Lockfile, used for selecting a target ID
LOCKFILE=${HA_RSCTMP}/iSCSITarget-${OCF_RESKEY_implementation}.lock

# targetcli: iSCSITarget and iSCSILogicalUnit must use the same lockfile
TARGETLOCKFILE=${HA_RSCTMP}/targetcli.lock
#######################################################################

meta_data() {
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="iSCSITarget">
<version>0.9</version>

<longdesc lang="en">
Manages iSCSI targets. An iSCSI target is a collection of SCSI Logical
Units (LUs) exported via a daemon that speaks the iSCSI protocol.
</longdesc>
<shortdesc lang="en">iSCSI target export agent</shortdesc>

<parameters>
<parameter name="implementation" required="0" unique="0">
<longdesc lang="en">
The iSCSI target daemon implementation. Must be one of "iet", "tgt",
"lio", or "lio-t".  If unspecified, an implementation is selected based on the
availability of management utilities, with "iet" being tried first,
then "tgt", then "lio", then "lio-t".
</longdesc>
<shortdesc lang="en">Specifies the iSCSI target implementation
("iet", "tgt", "lio", or "lio-t").</shortdesc>
<content type="string" default="${OCF_RESKEY_implementation_default}"/>
</parameter>

<parameter name="iqn" required="1" unique="1">
<longdesc lang="en">
The target iSCSI Qualified Name (IQN). Should follow the conventional
"iqn.yyyy-mm.&lt;reversed domain name&gt;[:identifier]" syntax.
</longdesc>
<shortdesc lang="en">iSCSI target IQN</shortdesc>
<content type="string" />
</parameter>

<parameter name="tid" required="0" unique="1">
<longdesc lang="en">
The iSCSI target ID. Required for tgt.
</longdesc>
<shortdesc lang="en">iSCSI target ID</shortdesc>
<content type="integer" />
</parameter>

<parameter name="portals" required="0" unique="0">
<longdesc lang="en">
iSCSI network portal addresses. Not supported by all
implementations. If unset, the default is to create one portal that
listens on ${OCF_RESKEY_portal_default}.
</longdesc>
<shortdesc lang="en">iSCSI portal addresses</shortdesc>
<content type="string" default="${OCF_RESKEY_portals_default}"/>
</parameter>

<parameter name="iser_portals" required="0" unique="0">
<longdesc lang="en">
iSCSI iSER network portal addresses. Not supported by all
implementations.
</longdesc>
<shortdesc lang="en">iSCSI iSER enabled portal addresses</shortdesc>
<content type="string"/>
</parameter>

<parameter name="allowed_initiators" required="0" unique="0">
<longdesc lang="en">
Allowed initiators. A space-separated list of initiators allowed to
connect to this target. Initiators may be listed in any syntax
the target implementation allows. If this parameter is empty or
not set, access to this target will be allowed from any initiator.
</longdesc>
<shortdesc lang="en">List of iSCSI initiators allowed to connect
to this target</shortdesc>
<content type="string" default=""/>
</parameter>

<parameter name="incoming_username" required="0" unique="1">
<longdesc lang="en">
A username used for incoming initiator authentication. If unspecified,
allowed initiators will be able to log in without authentication.
This is a unique parameter, as it not allowed to re-use a single
username across multiple target instances.
</longdesc>
<shortdesc lang="en">Incoming account username</shortdesc>
<content type="string"/>
</parameter>

<parameter name="incoming_password" required="0" unique="0">
<longdesc lang="en">
A password used for incoming initiator authentication.
</longdesc>
<shortdesc lang="en">Incoming account password</shortdesc>
<content type="string"/>
</parameter>

<parameter name="additional_parameters" required="0" unique="0">
<longdesc lang="en">
Additional target parameters. A space-separated list of "name=value"
pairs which will be passed through to the iSCSI daemon's management
interface. The supported parameters are implementation
dependent. Neither the name nor the value may contain whitespace.
</longdesc>
<shortdesc lang="en">List of iSCSI target parameters</shortdesc>
<content type="string" />
</parameter>

</parameters>

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

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

iSCSITarget_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
}

iSCSITarget_start() {
	iSCSITarget_monitor
	if [ $? =  $OCF_SUCCESS ]; then
		return $OCF_SUCCESS
	fi

	local param
	local name
	local value
	local initiator
	local portal

	case $OCF_RESKEY_implementation in
	iet)
		local lasttid
		local tid
		if [ "${OCF_RESKEY_tid}" ]; then
			tid="${OCF_RESKEY_tid}"
		else
			# Figure out the last used target ID, add 1 to get the new
			# target ID.
			ocf_take_lock $LOCKFILE
			ocf_release_lock_on_exit $LOCKFILE
			lasttid=`sed -ne "s/tid:\([[:digit:]]\+\) name:.*/\1/p" < /proc/net/iet/volume | sort -n | tail -n1`
			[ -z "${lasttid}" ] && lasttid=0
			tid=$((++lasttid))
		fi

		# Create the target.
		ocf_run ietadm --op new \
			--tid=${tid} \
			--params Name=${OCF_RESKEY_iqn} || exit $OCF_ERR_GENERIC

		# Set additional parameters.
		for param in ${OCF_RESKEY_additional_parameters}; do
			name=${param%=*}
			value=${param#*=}
			ocf_run ietadm --op update \
				--tid=${tid} \
				--params ${name}=${value} || exit $OCF_ERR_GENERIC
		done

		# Legacy versions of IET allow targets by default, current
		# versions deny. To be safe we manage both the .allow and
		# .deny files.
		if [ -n "${OCF_RESKEY_allowed_initiators}" ]; then
			echo "${OCF_RESKEY_iqn} ALL" >> /etc/initiators.deny
			echo "${OCF_RESKEY_iqn} ${OCF_RESKEY_allowed_initiators// /,}" >> /etc/initiators.allow
		else
			echo "${OCF_RESKEY_iqn} ALL" >> /etc/initiators.allow
		fi
		# In iet, adding a new user and assigning it to a target
		# is one operation.
		if [ -n "${OCF_RESKEY_incoming_username}" ]; then
			ocf_run ietadm --op new --user \
				--tid=${tid} \
				--params=IncomingUser=${OCF_RESKEY_incoming_username},Password=${OCF_RESKEY_incoming_password} \
				|| exit $OCF_ERR_GENERIC
		fi
		;;
	tgt)
		local tid
		tid="${OCF_RESKEY_tid}"
		# Create the target.
		ocf_run tgtadm --lld iscsi --op new --mode target \
			--tid=${tid} \
			--targetname ${OCF_RESKEY_iqn} || exit $OCF_ERR_GENERIC

		# Set parameters.
		for param in ${OCF_RESKEY_additional_parameters}; do
			name=${param%=*}
			value=${param#*=}
			ocf_run tgtadm --lld iscsi --op update --mode target \
				--tid=${tid} \
				--name=${name} --value=${value} || exit $OCF_ERR_GENERIC
		done

		# For tgt, we always have to add access per initiator;
		# access to targets is denied by default. If
		# "allowed_initiators" is unset, we must use the special
		# keyword ALL.
		for initiator in ${OCF_RESKEY_allowed_initiators=ALL}; do
			ocf_run tgtadm --lld iscsi --op bind --mode target \
				--tid=${tid} \
				--initiator-address=${initiator} || exit $OCF_ERR_GENERIC
		done

		# In tgt, we must first create a user account, then assign
		# it to a target using the "bind" operation.
		if [ -n "${OCF_RESKEY_incoming_username}" ]; then
			ocf_run tgtadm --lld iscsi --mode account --op new \
				--user=${OCF_RESKEY_incoming_username} \
				--password=${OCF_RESKEY_incoming_password} || exit $OCF_ERR_GENERIC
			ocf_run tgtadm --lld iscsi --mode account --op bind \
				--tid=${tid} \
				--user=${OCF_RESKEY_incoming_username} || exit $OCF_ERR_GENERIC
		fi
		;;
	lio)
		# lio distinguishes between targets and target portal
		# groups (TPGs). We will always create one TPG, with the
		# number 1. In lio, creating a network portal
		# automatically creates the corresponding target if it
		# doesn't already exist.
		for portal in ${OCF_RESKEY_portals}; do
			ocf_run lio_node --addnp ${OCF_RESKEY_iqn} 1 \
				${portal} || exit $OCF_ERR_GENERIC
		done

		# in lio, we can set target parameters by manipulating
		# the appropriate configfs entries
		for param in ${OCF_RESKEY_additional_parameters}; do
			name=${param%=*}
			value=${param#*=}
			configfs_path="/sys/kernel/config/target/iscsi/${OCF_RESKEY_iqn}/tpgt_1/param/${name}"
			if [ -e ${configfs_path} ]; then
				echo ${value} > ${configfs_path} || exit $OCF_ERR_GENERIC
			else
				ocf_log warn "Unsupported iSCSI target parameter ${name}: will be ignored."
			fi
		done

		# lio does per-initiator filtering by default. To disable
		# this, we need to switch the target to "permissive mode".
		if [ -n "${OCF_RESKEY_allowed_initiators}" ]; then
			for initiator in ${OCF_RESKEY_allowed_initiators}; do
				ocf_run lio_node --addnodeacl ${OCF_RESKEY_iqn} 1 \
				${initiator} || exit $OCF_ERR_GENERIC
			done
		else
			ocf_run lio_node --permissive ${OCF_RESKEY_iqn} 1 || exit $OCF_ERR_GENERIC
			# permissive mode enables read-only access by default,
			# so we need to change that to RW to be in line with
			# the other implementations.
			echo 0 > "/sys/kernel/config/target/iscsi/${OCF_RESKEY_iqn}/tpgt_1/attrib/demo_mode_write_protect"
			if [ `cat /sys/kernel/config/target/iscsi/${OCF_RESKEY_iqn}/tpgt_1/attrib/demo_mode_write_protect` -ne 0 ]; then
				ocf_log err "Failed to disable write protection for target ${OCF_RESKEY_iqn}."
				exit $OCF_ERR_GENERIC
			fi
		fi

		# TODO: add CHAP authentication support when it gets added
		# back into LIO
		ocf_run lio_node --disableauth ${OCF_RESKEY_iqn} 1 || exit $OCF_ERR_GENERIC
		# Finally, we need to enable the target to allow
		# initiators to connect
		ocf_run lio_node --enabletpg=${OCF_RESKEY_iqn} 1 || exit $OCF_ERR_GENERIC
		;;
	lio-t)
		# lio distinguishes between targets and target portal
		# groups (TPGs). We will always create one TPG, with the
		# number 1. In lio, creating a network portal
		# automatically creates the corresponding target if it
		# doesn't already exist.
		ocf_take_lock $TARGETLOCKFILE
		ocf_release_lock_on_exit $TARGETLOCKFILE
		ocf_run targetcli /iscsi set global auto_add_default_portal=false || exit $OCF_ERR_GENERIC
		ocf_run targetcli /iscsi create ${OCF_RESKEY_iqn} || exit $OCF_ERR_GENERIC
		for portal in ${OCF_RESKEY_portals}; do
			if [ $portal != ${OCF_RESKEY_portals_default} ] ; then
				IFS=':' read -a sep_portal <<< "$portal"
				ocf_run targetcli /iscsi/${OCF_RESKEY_iqn}/tpg1/portals create "${sep_portal[0]}" "${sep_portal[1]}" || exit $OCF_ERR_GENERIC
			else
				ocf_run targetcli /iscsi create ${OCF_RESKEY_iqn} || exit $OCF_ERR_GENERIC
			fi
		done
		# in lio, we can set target parameters by manipulating
		# the appropriate configfs entries
		for param in ${OCF_RESKEY_additional_parameters}; do
			name=${param%=*}
			value=${param#*=}
			configfs_path="/sys/kernel/config/target/iscsi/${OCF_RESKEY_iqn}/tpgt_1/param/${name}"
			if [ -e ${configfs_path} ]; then
				echo ${value} > ${configfs_path} || exit $OCF_ERR_GENERIC
			else
				ocf_log warn "Unsupported iSCSI target parameter ${name}: will be ignored."
			fi
		done
		
		# allow iSER enabled portal
		for iser_portal in ${OCF_RESKEY_iser_portals}; do
                       configfs_path="/sys/kernel/config/target/iscsi/${OCF_RESKEY_iqn}/tpgt_1/np/${iser_portal}\:*/iser"
                       if [ -f ${configfs_path} ]; then
                                 echo "1" > ${configfs_path} || exit $OCF_ERR_GENERIC
                       else
                                 ocf_log warn "Unable to set iSER on: $iser_portal"
                       fi
                done
		
		# lio does per-initiator filtering by default. To disable
		# this, we need to switch the target to "permissive mode".
		if [ -n "${OCF_RESKEY_allowed_initiators}" ]; then
			for initiator in ${OCF_RESKEY_allowed_initiators}; do
				ocf_run targetcli /iscsi/${OCF_RESKEY_iqn}/tpg1/acls create ${initiator} || exit $OCF_ERR_GENERIC
			done
		else
			ocf_run targetcli /iscsi/${OCF_RESKEY_iqn}/tpg1/ set attribute authentication=0 demo_mode_write_protect=0 generate_node_acls=1 cache_dynamic_acls=1 || exit $OCF_ERR_GENERIC
		fi
		# TODO: add CHAP authentication support when it gets added
		# back into LIO
		ocf_run targetcli /iscsi/${OCF_RESKEY_iqn}/tpg1/ set attribute authentication=0 || exit $OCF_ERR_GENERIC
#			   ocf_run targetcli /iscsi 
		;;
	esac

	iSCSITarget_monitor
}

iSCSITarget_stop() {
	iSCSITarget_monitor
	if [ $? -eq $OCF_NOT_RUNNING ]; then
		return $OCF_SUCCESS
	fi

	local tid
	case $OCF_RESKEY_implementation in
	iet)
		# Figure out the target ID
		tid=`sed -ne "s/tid:\([[:digit:]]\+\) name:${OCF_RESKEY_iqn}/\1/p" < /proc/net/iet/volume`
		if [ -z "${tid}" ]; then
			ocf_log err "Failed to retrieve target ID for IQN ${OCF_RESKEY_iqn}"
			exit $OCF_ERR_GENERIC
		fi
		# Close existing connections. There is no other way to
		# do this in IET than to parse the contents of
		# /proc/net/iet/session.
		set -- $(sed -ne '/^tid:'${tid}' /,/^tid/ {
						  /^[[:space:]]*sid:\([0-9]\+\)/ {
							 s/^[[:space:]]*sid:\([0-9]*\).*/--sid=\1/; h;
						  };
						  /^[[:space:]]*cid:\([0-9]\+\)/ { 
							  s/^[[:space:]]*cid:\([0-9]*\).*/--cid=\1/; G; p; 
						  }; 
					  }' < /proc/net/iet/session)
		while [[ -n $2 ]]; do
			# $2 $1 looks like "--sid=X --cid=Y"
			ocf_run ietadm --op delete \
				 --tid=${tid} $2 $1
			shift 2
		done
			# In iet, unassigning a user from a target and
		# deleting the user account is one operation.
		if [ -n "${OCF_RESKEY_incoming_username}" ]; then
			ocf_run ietadm --op delete --user \
			--tid=${tid} \
			--params=IncomingUser=${OCF_RESKEY_incoming_username} \
			|| exit $OCF_ERR_GENERIC
		fi
		# Loop on delete. Keep trying until we time out, if
		# necessary.
		while true; do
			if ietadm --op delete --tid=${tid}; then
				ocf_log debug "Removed target ${OCF_RESKEY_iqn}."
				break
			else
				ocf_log warn "Failed to remove target ${OCF_RESKEY_iqn}, retrying."
				sleep 1
			fi
		done
		# Avoid stale /etc/initiators.{allow,deny} entries
		# for this target
		if [ -e /etc/initiators.deny ]; then
			ocf_run sed -e "/^${OCF_RESKEY_iqn}[[:space:]]/d" \
			-i /etc/initiators.deny
		fi
		if [ -e /etc/initiators.allow ]; then
			ocf_run sed -e "/^${OCF_RESKEY_iqn}[[:space:]]/d" \
			-i /etc/initiators.allow
		fi
		;;
	tgt)
		tid="${OCF_RESKEY_tid}"
		# Close existing connections. There is no other way to
		# do this in tgt than to parse the output of "tgtadm --op
		# show".
		set -- $(tgtadm --lld iscsi --op show --mode target \
			| sed -ne '/^Target '${tid}':/,/^Target/ {
						  /^[[:space:]]*I_T nexus: \([0-9]\+\)/ {
							 s/^.*: \([0-9]*\).*/--sid=\1/; h;
						  };
						  /^[[:space:]]*Connection: \([0-9]\+\)/ { 
							  s/^.*: \([0-9]*\).*/--cid=\1/; G; p; 
						  }; 
						  /^[[:space:]]*LUN information:/ q; 
					  }')
		while [[ -n $2 ]]; do
			# $2 $1 looks like "--sid=X --cid=Y"
			ocf_run tgtadm --lld iscsi --op delete --mode connection \
			--tid=${tid} $2 $1
			shift 2
		done
			# In tgt, we must first unbind the user account from
		# the target, then remove the account itself.
		if [ -n "${OCF_RESKEY_incoming_username}" ]; then
			ocf_run tgtadm --lld iscsi --mode account --op unbind \
				--tid=${tid} \
				--user=${OCF_RESKEY_incoming_username} || exit $OCF_ERR_GENERIC
			ocf_run tgtadm --lld iscsi --mode account --op delete \
				--user=${OCF_RESKEY_incoming_username} || exit $OCF_ERR_GENERIC
		fi
		# Loop on delete. Keep trying until we time out, if
		# necessary.
		while true; do
			if tgtadm --lld iscsi --op delete --mode target --tid=${tid}; then
				ocf_log debug "Removed target ${OCF_RESKEY_iqn}."
				break
			else
				ocf_log warn "Failed to remove target ${OCF_RESKEY_iqn}, retrying."
				sleep 1
			fi
		done
		# In tgt, we don't have to worry about our ACL
		# entries. They are automatically removed upon target
		# deletion.
		;;
	lio)
		# In lio, removing a target automatically removes all
		# associated TPGs, network portals, and LUNs.
		ocf_run lio_node --deliqn ${OCF_RESKEY_iqn} || exit $OCF_ERR_GENERIC
		;;
	lio-t)
		ocf_take_lock $TARGETLOCKFILE
		ocf_release_lock_on_exit $TARGETLOCKFILE
		ocf_run targetcli /iscsi delete ${OCF_RESKEY_iqn} || exit $OCF_ERR_GENERIC
		;;
	esac

	return $OCF_SUCCESS
}

iSCSITarget_monitor() {
	case $OCF_RESKEY_implementation in
	iet)
		grep -Eq "tid:[0-9]+ name:${OCF_RESKEY_iqn}" /proc/net/iet/volume && return $OCF_SUCCESS
		;;
	tgt)
		tgtadm --lld iscsi --op show --mode target \
		| grep -Eq "Target [0-9]+: ${OCF_RESKEY_iqn}" && return $OCF_SUCCESS
		;;
	lio | lio-t)
		# if we have no configfs entry for the target, it's
		# definitely stopped
		[ -d /sys/kernel/config/target/iscsi/${OCF_RESKEY_iqn} ] || return $OCF_NOT_RUNNING
		# if the target is there, but its TPG is not enabled, then
		# we also consider it stopped
		[ `cat /sys/kernel/config/target/iscsi/${OCF_RESKEY_iqn}/tpgt_1/enable` -eq 1 ] || return $OCF_NOT_RUNNING
		return $OCF_SUCCESS
		;;
	esac
	
	return $OCF_NOT_RUNNING
}

iSCSITarget_validate() {
	# Do we have all required variables?
	local required_vars
	case $OCF_RESKEY_implementation in
	iet)
		required_vars="iqn"
		;;
	tgt)
		required_vars="iqn tid"
		;;
	esac

	for var in ${required_vars}; do
		param="OCF_RESKEY_${var}"
		if [ -z "${!param}" ]; then
			ocf_exit_reason "Missing resource parameter \"$var\"!"
			exit $OCF_ERR_CONFIGURED
		fi
	done

	# Is the configured implementation supported?
	case "$OCF_RESKEY_implementation" in
	"iet"|"tgt"|"lio"|"lio-t")
		;;
	"")
		# The user didn't specify an implementation, and we were
		# unable to determine one from installed binaries (in
		# other words: no binaries for any supported
		# implementation could be found)
		ocf_exit_reason "Undefined iSCSI target implementation"
		exit $OCF_ERR_INSTALLED
		;;
	*)
		ocf_exit_reason "Unsupported iSCSI target implementation \"$OCF_RESKEY_implementation\"!"
		exit $OCF_ERR_CONFIGURED
		;;
	esac

	# Do we have any configuration parameters that the current
	# implementation does not support?
	local unsupported_params
	local var
	local envar
	case $OCF_RESKEY_implementation in
	iet|tgt)
		# IET and tgt do not support binding a target portal to a
		# specific IP address.
		unsupported_params="portals"
		;;
	lio|lio-t)
		# TODO: Remove incoming_username and incoming_password
		# from this check when LIO 3.0 gets CHAP authentication
		unsupported_params="tid incoming_username incoming_password"
		;;
	esac

	for var in ${unsupported_params}; do
		envar=OCF_RESKEY_${var}
		defvar=OCF_RESKEY_${var}_default
		if [ -n "${!envar}" ]; then
			if  [[ "${!envar}" != "${!defvar}" ]];then
				case "$__OCF_ACTION" in
					start|validate-all)
						ocf_log warn "Configuration parameter \"${var}\"" \
							"is not supported by the iSCSI implementation" \
							"and will be ignored." ;;
				esac
			fi
		fi
	done

	if ! ocf_is_probe; then
		# Do we have all required binaries?
	case $OCF_RESKEY_implementation in
	iet)
		check_binary ietadm
		;;
	tgt)
		check_binary tgtadm
		;;
	lio)
		check_binary tcm_node
		check_binary lio_node
		;;
	lio-t)
		check_binary targetcli
		;;
	esac

	# Is the required kernel functionality available?
	case $OCF_RESKEY_implementation in
	iet)
		[ -d /proc/net/iet ]
		if [ $? -ne 0 ]; then
			ocf_log err "/proc/net/iet does not exist or is not a directory -- check if required modules are loaded."
			exit $OCF_ERR_INSTALLED
		fi
		;;
	tgt)
			# tgt is userland only
		;;
	lio)
			# lio needs configfs to be mounted
		if ! grep -Eq "^.*/sys/kernel/config[[:space:]]+configfs" /proc/mounts; then
			ocf_log err "configfs not mounted at /sys/kernel/config -- check if required modules are loaded."
			exit $OCF_ERR_INSTALLED
		fi
			# check for configfs entries created by target_core_mod
		if [ ! -d /sys/kernel/config/target ]; then
			ocf_log err "/sys/kernel/config/target does not exist or is not a directory -- check if required modules are loaded."
			exit $OCF_ERR_INSTALLED
		fi
		;;
	lio-t)
		#targetcli loads the needed kernel modules
		;;
	esac
	fi

	return $OCF_SUCCESS
}


case $1 in
  meta-data)
	meta_data
	exit $OCF_SUCCESS
	;;
  usage|help)
	iSCSITarget_usage
	exit $OCF_SUCCESS
	;;
esac

# Everything except usage and meta-data must pass the validate test
iSCSITarget_validate

case $__OCF_ACTION in
start)		iSCSITarget_start;;
stop)		iSCSITarget_stop;;
monitor|status)	iSCSITarget_monitor;;
reload)		ocf_log err "Reloading..."
			iSCSITarget_start
		;;
validate-all)	;;
*)		iSCSITarget_usage
		exit $OCF_ERR_UNIMPLEMENTED
		;;
esac
rc=$?
ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION : $rc"
exit $rc