Current File : //usr/lib/dracut/modules.d/95iscsi/iscsiroot.sh
#!/bin/sh
#
# This implementation is incomplete: Discovery mode is not implemented and
# the argument handling doesn't follow currently agreed formats. This is mainly
# because rfc4173 does not say anything about iscsi_initiator but open-iscsi's
# iscsistart needs this.
#
type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
type parse_iscsi_root >/dev/null 2>&1 || . /lib/net-lib.sh
type write_fs_tab >/dev/null 2>&1 || . /lib/fs-lib.sh
PATH=/usr/sbin:/usr/bin:/sbin:/bin
# Huh? Empty $1?
[ -z "$1" ] && exit 1
# Huh? Empty $2?
[ -z "$2" ] && exit 1
# Huh? Empty $3? This isn't really necessary, since NEWROOT isn't
# used here. But let's be consistent
[ -z "$3" ] && exit 1
# root is in the form root=iscsi:[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname>
netif="$1"
iroot="$2"
# If it's not iscsi we don't continue
[ "${iroot%%:*}" = "iscsi" ] || exit 1
iroot=${iroot#iscsi}
iroot=${iroot#:}
# XXX modprobe crc32c should go in the cmdline parser, but I haven't yet
# figured out a way how to check whether this is built-in or not
modprobe crc32c 2>/dev/null
if [ -z "${DRACUT_SYSTEMD}" ] && [ -e /sys/module/bnx2i ] && ! [ -e /tmp/iscsiuio-started ]; then
iscsiuio
> /tmp/iscsiuio-started
fi
handle_firmware()
{
local ifaces retry
# Depending on the 'ql4xdisablesysfsboot' qla4xxx
# will be autostarting sessions without presenting
# them via the firmware interface.
# In these cases 'iscsiadm -m fw' will fail, but
# the iSCSI sessions will still be present.
if ! iscsiadm -m fw; then
warn "iscsiadm: Could not get list of targets from firmware."
else
ifaces=$(set -- /sys/firmware/ibft/ethernet*; echo $#)
retry=$(cat /tmp/session-retry)
if [ $retry -lt $ifaces ]; then
retry=$((retry+1))
echo $retry > /tmp/session-retry
return 1
else
rm /tmp/session-retry
fi
if ! iscsiadm -m fw -l; then
warn "iscsiadm: Log-in to iscsi target failed"
else
need_shutdown
fi
fi
[ -d /sys/class/iscsi_session ] || return 1
echo 'started' > "/tmp/iscsistarted-iscsi:"
echo 'started' > "/tmp/iscsistarted-firmware"
return 0
}
handle_netroot()
{
local iscsi_initiator iscsi_target_name iscsi_target_ip iscsi_target_port
local iscsi_target_group iscsi_protocol iscsirw iscsi_lun
local iscsi_username iscsi_password
local iscsi_in_username iscsi_in_password
local iscsi_iface_name iscsi_netdev_name
local iscsi_param param
local p found
local login_retry_max_seen=
# override conf settings by command line options
arg=$(getarg rd.iscsi.initiator -d iscsi_initiator=)
[ -n "$arg" ] && iscsi_initiator=$arg
arg=$(getarg rd.iscsi.target.group -d iscsi_target_group=)
[ -n "$arg" ] && iscsi_target_group=$arg
arg=$(getarg rd.iscsi.username -d iscsi_username=)
[ -n "$arg" ] && iscsi_username=$arg
arg=$(getarg rd.iscsi.password -d iscsi_password)
[ -n "$arg" ] && iscsi_password=$arg
arg=$(getarg rd.iscsi.in.username -d iscsi_in_username=)
[ -n "$arg" ] && iscsi_in_username=$arg
arg=$(getarg rd.iscsi.in.password -d iscsi_in_password=)
[ -n "$arg" ] && iscsi_in_password=$arg
for p in $(getargs rd.iscsi.param -d iscsi_param); do
[ "${p%=*}" = node.session.initial_login_retry_max ] && \
login_retry_max_seen=yes
iscsi_param="$iscsi_param $p"
done
# this sets iscsi_target_name and possibly overwrites most
# parameters read from the command line above
parse_iscsi_root "$1" || return 1
# Bail out early, if there is no route to the destination
if is_ip "$iscsi_target_ip" && [ "$netif" != "timeout" ] && ! all_ifaces_setup && getargbool 1 rd.iscsi.testroute; then
ip route get "$iscsi_target_ip" >/dev/null 2>&1 || return 0
fi
#limit iscsistart login retries
if [ "$login_retry_max_seen" != yes ]; then
retries=$(getargnum 3 0 10000 rd.iscsi.login_retry_max)
if [ $retries -gt 0 ]; then
iscsi_param="${iscsi_param% } node.session.initial_login_retry_max=$retries"
fi
fi
# XXX is this needed?
getarg ro && iscsirw=ro
getarg rw && iscsirw=rw
fsopts=${fsopts:+$fsopts,}${iscsirw}
if [ -z "$iscsi_initiator" ] && [ -f /sys/firmware/ibft/initiator/initiator-name ] && ! [ -f /tmp/iscsi_set_initiator ]; then
iscsi_initiator=$(while read line || [ -n "$line" ]; do echo $line;done < /sys/firmware/ibft/initiator/initiator-name)
echo "InitiatorName=$iscsi_initiator" > /run/initiatorname.iscsi
rm -f /etc/iscsi/initiatorname.iscsi
mkdir -p /etc/iscsi
ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi
> /tmp/iscsi_set_initiator
if [ -n "$DRACUT_SYSTEMD" ]; then
systemctl try-restart iscsid
# FIXME: iscsid is not yet ready, when the service is :-/
sleep 1
fi
fi
if [ -z "$iscsi_initiator" ]; then
[ -f /run/initiatorname.iscsi ] && . /run/initiatorname.iscsi
[ -f /etc/initiatorname.iscsi ] && . /etc/initiatorname.iscsi
[ -f /etc/iscsi/initiatorname.iscsi ] && . /etc/iscsi/initiatorname.iscsi
iscsi_initiator=$InitiatorName
fi
if [ -z "$iscsi_initiator" ]; then
iscsi_initiator=$(iscsi-iname)
echo "InitiatorName=$iscsi_initiator" > /run/initiatorname.iscsi
rm -f /etc/iscsi/initiatorname.iscsi
mkdir -p /etc/iscsi
ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi
> /tmp/iscsi_set_initiator
if [ -n "$DRACUT_SYSTEMD" ]; then
systemctl try-restart iscsid
# FIXME: iscsid is not yet ready, when the service is :-/
sleep 1
fi
fi
if [ -z "$iscsi_target_port" ]; then
iscsi_target_port=3260
fi
if [ -z "$iscsi_target_group" ]; then
iscsi_target_group=1
fi
if [ -z "$iscsi_lun" ]; then
iscsi_lun=0
fi
echo "InitiatorName=$iscsi_initiator" > /run/initiatorname.iscsi
ln -fs /run/initiatorname.iscsi /dev/.initiatorname.iscsi
if ! [ -e /etc/iscsi/initiatorname.iscsi ]; then
mkdir -p /etc/iscsi
ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi
if [ -n "$DRACUT_SYSTEMD" ]; then
systemctl try-restart iscsid
# FIXME: iscsid is not yet ready, when the service is :-/
sleep 1
fi
fi
if [ -z "$DRACUT_SYSTEMD" ]; then
iscsid
sleep 2
fi
# FIXME $iscsi_protocol??
if [ "$root" = "dhcp" ] || [ "$netroot" = "dhcp" ]; then
# if root is not specified try to mount the whole iSCSI LUN
printf 'SYMLINK=="disk/by-path/*-iscsi-*-%s", SYMLINK+="root"\n' "$iscsi_lun" >> /etc/udev/rules.d/99-iscsi-root.rules
udevadm control --reload
write_fs_tab /dev/root
wait_for_dev -n /dev/root
# install mount script
[ -z "$DRACUT_SYSTEMD" ] && \
echo "iscsi_lun=$iscsi_lun . /bin/mount-lun.sh " > $hookdir/mount/01-$$-iscsi.sh
fi
targets=$(iscsiadm -m discovery -t st -p $iscsi_target_ip:${iscsi_target_port:+$iscsi_target_port} | sed 's/^.*iqn/iqn/')
[ -z "$targets" ] && echo "Target discovery to $iscsi_target_ip:${iscsi_target_port:+$iscsi_target_port} failed with status $?" && return 1
found=
for target in $targets; do
if [ "$target" = "$iscsi_target_name" ]; then
if [ -n "$iscsi_iface_name" ]; then
iscsiadm -m iface -I $iscsi_iface_name --op=new
EXTRA=" ${iscsi_netdev_name:+--name=iface.net_ifacename --value=$iscsi_netdev_name} "
EXTRA="$EXTRA ${iscsi_initiator:+--name=iface.initiatorname --value=$iscsi_initiator} "
fi
[ -n "$iscsi_param" ] && for param in $iscsi_param; do EXTRA="$EXTRA --name=${param%=*} --value=${param#*=}"; done
CMD="iscsiadm -m node -T $target \
${iscsi_iface_name:+-I $iscsi_iface_name} \
-p $iscsi_target_ip${iscsi_target_port:+:$iscsi_target_port}"
__op="--op=update \
--name=node.startup --value=onboot \
${iscsi_username:+ --name=node.session.auth.username --value=$iscsi_username} \
${iscsi_password:+ --name=node.session.auth.password --value=$iscsi_password} \
${iscsi_in_username:+--name=node.session.auth.username_in --value=$iscsi_in_username} \
${iscsi_in_password:+--name=node.session.auth.password_in --value=$iscsi_in_password} \
$EXTRA \
$NULL"
$CMD $__op
if [ "$netif" != "timeout" ]; then
$CMD --login
fi
found=yes
break
fi
done
if [ "$netif" = "timeout" ]; then
iscsiadm -m node -L onboot || :
elif [ "$found" != yes ]; then
warn "iSCSI target \"$iscsi_target_name\" not found on portal $iscsi_target_ip:$iscsi_target_port"
return 1
fi
> $hookdir/initqueue/work
netroot_enc=$(str_replace "$1" '/' '\2f')
echo 'started' > "/tmp/iscsistarted-iscsi:${netroot_enc}"
return 0
}
ret=0
if [ "$netif" != "timeout" ] && getargbool 0 rd.iscsi.waitnet; then
all_ifaces_setup || exit 0
fi
if [ "$netif" = "timeout" ] && all_ifaces_setup; then
# s.th. went wrong and the timeout script hits
# restart
systemctl restart iscsid
# damn iscsid is not ready after unit says it's ready
sleep 2
fi
if getargbool 0 rd.iscsi.firmware -d -y iscsi_firmware ; then
if [ "$netif" = "timeout" ] || [ "$netif" = "online" ] || [ "$netif" = "dummy" ]; then
[ -f /tmp/session-retry ] || echo 1 > /tmp/session-retry
handle_firmware
ret=$?
fi
fi
if ! [ "$netif" = "online" ]; then
# loop over all netroot parameter
if nroot=$(getarg netroot) && [ "$nroot" != "dhcp" ]; then
for nroot in $(getargs netroot); do
[ "${nroot%%:*}" = "iscsi" ] || continue
nroot="${nroot##iscsi:}"
if [ -n "$nroot" ]; then
handle_netroot "$nroot"
ret=$(($ret + $?))
fi
done
else
if [ -n "$iroot" ]; then
handle_netroot "$iroot"
ret=$?
fi
fi
fi
need_shutdown
# now we have a root filesystem somewhere in /dev/sd*
# let the normal block handler handle root=
exit $ret
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