#!/bin/bash
#
# /etc/init.d/iscsi
#
### BEGIN INIT INFO
# Provides: iscsi
# Required-Start: $network
# Should-Start: iscsitarget multipathd
# Required-Stop: $network
# Should-Stop: multipathd
# Default-Start: 3 5
# Default-Stop:
# Short-Description: iSCSI initiator daemon
# Description: The iSCSI initator is used to create and
# manage iSCSI connections to an iSCSI Target.
#
### END INIT INFO
CONFIG_FILE=/etc/iscsi/iscsid.conf
DAEMON=/sbin/iscsid
ISCSIADM=/sbin/iscsiadm
BRCM_ISCSIUIO=/sbin/brcm_iscsiuio
ARGS="-c $CONFIG_FILE -n"
# Source LSB init functions
. /etc/rc.status
# Reset status of this service
rc_reset
DM_MAJOR=$(sed -n 's/\(.*\) device-mapper/\1/p' /proc/devices)
iscsi_login_all_nodes()
{
echo -n "Setting up iSCSI targets: "
$ISCSIADM -m node --loginall=automatic 2> /dev/null
if [ $? == 21 ] ; then
rc_failed 6
fi
rc_status -v
}
#
# Try to load all required modules prior to startup
#
iscsi_load_transport_modules()
{
loaded=$(sed -n "/^iscsi_tcp/p" /proc/modules)
if [ -z "$loaded" ] ; then
modprobe iscsi_tcp
if [ $? = 0 ] ; then
echo -n " tcp"
fi
fi
for iface in /etc/iscsi/ifaces/*; do
[ -f "$iface" ] || continue
[ "$iface" = "iface.example" ] && continue
# Check if the iface has been configured
result=$(sed '/#.*/D;/iface.iscsi_ifacename/D;/iface.hwaddress/D;/iface.transport_name/D' $iface)
if [ "$result" ] ; then
mod=$(sed -n 's/iface.transport_name *= *\(.*\)/\1/p' $iface)
loaded=$(sed -n "/^$mod/p" /proc/modules)
if [ -z "$loaded" ] ; then
modprobe $mod
if [ $? = 0 ] ; then
echo -n " $mod"
fi
fi
fi
done
}
#
# Set a temporary startmode for ifdown
#
iscsi_modify_if_startmode()
{
local ifname=$1
local tmp_ifcfg=/dev/.sysconfig/network/if-$ifname
if [ -e "$tmp_ifcfg" ] ; then
. $tmp_ifcfg
if [ "$startmode" ] ; then
return
fi
fi
: disabling shutdown on $ifname
echo "startmode=nfsroot" >> $tmp_ifcfg
}
iscsi_get_ifacename_from_session()
{
local session=$1
local ifacename
ifacename=$(iscsiadm -m session -r ${session##.*/session} 2> /dev/null | \
sed -n 's/iface.iscsi_ifacename = \(.*\)/\1/p')
if [ -z "$ifacename" ] ; then
# Check for iBFT
ifacename=$(iscsiadm -m fw 2> /dev/null)
if [ -n "$ifacename" ] ; then
ifacename="fw"
fi
fi
echo $ifacename
}
iscsi_get_hwaddress_from_iface()
{
local iface=$1
local hwaddress
hwaddress=$(iscsiadm -m iface -I "$iface" 2> /dev/null | sed -n 's/iface.hwaddress = \(.*\)/\1/p')
[ "$hwaddress" = "<empty>" ] && hwaddress=
echo $hwaddress
}
iscsi_get_ifname_from_iface()
{
local iface=$1
local ifname
ifname=$(iscsiadm -m iface -I "$iface" 2> /dev/null | sed -n 's/iface.net_ifacename = \(.*\)/\1/p')
[ "$ifname" = "<empty>" ] && ifname=
echo $ifname
}
iscsi_get_ipaddr_from_iface()
{
local iface=$1
local ipaddr
ipaddr=$(iscsiadm -m iface -I "$iface" 2> /dev/null | sed -n 's/iface.ipaddress = \(.*\)/\1/p')
[ "$ipaddr" = "<empty>" ] && ipaddr=
echo $ipaddr
}
iscsi_get_ifname_from_firmware()
{
local hwaddress
hwaddress=$(iscsiadm -m fw 2> /dev/null | sed -n 's/iface.net_ifacename = \(.*\)/\1/p')
echo $hwaddress
}
#
# cxgb3i is using the HWAddress to select
# the correct interface
#
iscsi_get_ifname_from_hwaddress()
{
local hwaddress=$1
for if in /sys/class/net/*; do
[ -e "$if" ] || continue
read mac < $if/address
[ "$mac" = "$hwaddress" ] || continue
echo ${if##*/}
break
done
}
iscsi_get_ifname_from_ipaddr()
{
local ipaddr=$1
local ifname
ifname=$(ip addr show to $ipaddr | sed -n 's/[0-9]*: \([^ :]*\): .*/\1/p')
return $ifname
}
#
# Handle 'default' interface:
# It is basically impossible to determine via which
# interface the iSCSI traffic will flow, so we take
# the easy option and ignore _all_ active interfaces
# during shutdown
#
iscsi_modify_all_interfaces()
{
ip link show up | sed -n '/.*LOOPBACK.*/d;s/[0-9]*: \(.*\): .*/\1/p' | while read ifname; do
iscsi_modify_if_startmode $ifname
done
}
#
# Check iface setting and disable
# affected network interfaces
#
iscsi_check_interface()
{
local session=$1
local i h n
i=$(iscsi_get_ifacename_from_session $session)
[ -z "$i" ] && continue
if [ "$i" = "default" ] ; then
iscsi_modify_all_interfaces
elif [ "$i" = "fw" ] ; then
n=$(iscsi_get_ifname_from_firmware)
else
n=$(iscsi_get_ifname_from_iface $i)
if [ -z "$n" ] ; then
h=$(iscsi_get_hwaddress_from_iface $i)
if [ -n "$h" ] ; then
n=$(iscsi_get_ifname_from_hwaddress $h)
fi
fi
if [ -z "$n" ] ; then
h=$(iscsi_get_ipaddr_from_iface $i)
if [ -n "$h" ] ; then
n=$(iscsi_get_ifname_from_ipaddr $h)
fi
fi
fi
if [ "$n" ] ; then
iscsi_modify_if_startmode $n
fi
}
#
# Check if device 'dev' is mounted
# Returns the mount point on success
#
iscsi_check_if_mounted()
{
local dev=$1
local d m t o x p
cat /proc/mounts | sed -ne '/^\/dev\/.*/p' | while read d m t o x; do
if [ -L "$d" ] ; then
d=$(readlink -f $d)
fi
[ -b "$d" ] || continue
b=$(ls -l $d | sed -n 's/.* \([0-9]*\), \([0-9]*\) .*/\1:\2/p')
p=$(cd -P /sys/dev/block/$b ; echo $PWD)
if [ -z "$p" ] ; then
d=${d##/dev}
p="/sys/block${d%%[0-9]*}"
fi
[ ! -d ${p} ] && continue
if [ -e $p/partition ] ; then
p=$(cd -P $p/../; echo $PWD)
fi
if [ "$dev" = "${p##*/}" ] ; then
echo $m
fi
done
}
#
# Unwind block device stack
#
# Stops unwinding if either no more 'holders'
# are found or if a device is mounted
#
# Unmounts top-level device and deconfigures
# all devices down the stack
#
# Root fs is not unmounted
#
iscsi_unwind_stack()
{
local p=$1
local d=${p##*/}
local u
local m
if [ ! -d ${p} ] ; then
return;
fi
m=$(iscsi_check_if_mounted $d)
if [ -z "$m" ] ; then
for s in $p/holders/* ; do
[ -e $s ] || continue
p=$(cd -P $s; echo $PWD)
u=$(iscsi_unwind_stack $p)
if [ "$u" ] ; then
echo -n "$u "
fi
done
else
if [ "$m" = "/" ] ; then
echo -n "$d "
return 1
fi
if ! umount $m ; then
echo -n "$d "
return 1
fi
fi
if [ "${d#dm-}" != "$d" ] ; then
if ! dmsetup remove -j $DM_MAJOR -m ${d#dm-} 2> /dev/null ; then
echo -n "$d "
return 1
fi
fi
if [ "${d#md}" != "$d" ] ; then
if ! mdadm --manage /dev/$d --stop 2> /dev/null ; then
echo -n "$d "
return 1
fi
fi
return 0
}
#
# Return all targets for a given session
#
iscsi_get_target()
{
local session=$1
local d
for d in $session/device/target* ; do
[ -e "$d" ] || continue
echo "$d"
done
}
#
# Checks all devices presented by a target
# and tries to umount them.
# Skip unmounting for the root fs.
# Stops on the first device which could not be unmounted
# and returns the mount device of that device.
#
iscsi_check_target()
{
local t=$1
local d b m
for d in $t/* ; do
[ -d $d/block ] || continue
for b in $d/block/sd* ; do
[ -d "$b" ] || continue
m=$(iscsi_unwind_stack $b)
if [ -n "$m" ] ; then
echo $m
return 1
fi
done
done
}
#
# Check all sessions for mounted devices
# and shutdown the session if the affected
# devices could be umounted cleanly.
# If umount fails disable shutdown on all
# affected network interfaces
#
iscsi_stop_sessions()
{
local t m s i
i=0
for session in /sys/class/iscsi_session/session* ; do
[ -e "$session" ] || continue;
[ -e $session/device ] || continue
t=$(iscsi_get_target $session)
m=$(iscsi_check_target $t)
s=${session##*/session}
if [ -z "$m" ] ; then
iscsiadm -m session -r ${s} -u
i=$(( $i + 1 ))
else
iscsi_check_interface $s
fi
done
echo $i
}
iscsi_list_all_nodes()
{
# Check for active sessions
if $ISCSIADM -m session > /dev/null; then
return 0
fi
echo "Active connections:"
$ISCSIADM -m session | while read proto num PORTAL TARGET ; do
PORTAL=${PORTAL%,*}
echo -e "\t$TARGET at $PORTAL"
done
}
case "$1" in
start)
if checkproc $DAEMON ; then
RETVAL=0
else
echo -n "Starting iSCSI initiator service: "
iscsi_load_transport_modules
if grep -q bnx2i /proc/modules && [ -x $BRCM_ISCSIUIO ] ; then
startproc $BRCM_ISCSIUIO
fi
startproc $DAEMON $ARGS
RETVAL=$?
rc_status -v
fi
if [ "$RETVAL" == "0" ]; then
iscsi_login_all_nodes
fi
;;
stop)
n=$(iscsi_stop_sessions)
echo -n "Stopping iSCSI initiator service: "
if [ "$n" ] && [ "$n" != "0" ] ; then
m=$(iscsiadm -m session 2> /dev/null)
if [ -z "$m" ] ; then
killproc -KILL $DAEMON
RETVAL=$?
if grep -q bnx2i /proc/modules && [ -x $BRCM_ISCSIUIO ]; then
killproc -KILL $BRCM_ISCSIUIO
fi
RETVAL=$?
else
RETVAL=1
fi
rc_failed $RETVAL
rc_status -v
else
# umounting failed, leave initiator running
rc_status -s
fi
;;
status)
echo -n "Checking for iSCSI initiator service: "
if checkproc $DAEMON ; then
rc_status -v
iscsi_list_all_nodes
else
rc_failed 3
rc_status -v
fi
;;
restart|reload)
$0 stop
RETVAL=$?
if [ "$RETVAL" != "0" ]; then
echo "Stopping iSCSI initiator service failed, not starting"
exit $RETVAL
fi
sleep 1
$0 start
;;
*)
echo "Usage: $0 {start|stop|status|restart|reload}"
exit 1
;;
esac
rc_exit