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Mini Shell
#!/bin/sh
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=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()
{
if ! iscsistart -f; then
warn "iscistart: Could not get list of targets from firmware. Skipping."
echo 'skipped' > "/tmp/iscsistarted-firmware"
return 0
fi
for p in $(getargs rd.iscsi.param -d iscsi_param); do
iscsi_param="$iscsi_param --param $p"
done
if ! iscsistart -b $iscsi_param; then
warn "'iscsistart -b $iscsi_param' failed with return code $?"
fi
echo 'started' > "/tmp/iscsistarted-iscsi:"
echo 'started' > "/tmp/iscsistarted-firmware"
need_shutdown
return 0
}
handle_netroot()
{
local iscsi_initiator iscsi_target_name iscsi_target_ip iscsi_target_port
local iscsi_target_group iscsi_protocol iscsirw iscsi_lun
local iscsi_username iscsi_password
local iscsi_in_username iscsi_in_password
local iscsi_iface_name iscsi_netdev_name
local iscsi_param
local p
# override conf settings by command line options
arg=$(getargs rd.iscsi.initiator -d iscsi_initiator=)
[ -n "$arg" ] && iscsi_initiator="$arg"
arg=$(getargs rd.iscsi.target.name -d iscsi_target_name=)
[ -n "$arg" ] && iscsi_target_name="$arg"
arg=$(getargs rd.iscsi.target.ip -d iscsi_target_ip)
[ -n "$arg" ] && iscsi_target_ip="$arg"
arg=$(getargs rd.iscsi.target.port -d iscsi_target_port=)
[ -n "$arg" ] && iscsi_target_port="$arg"
arg=$(getargs rd.iscsi.target.group -d iscsi_target_group=)
[ -n "$arg" ] && iscsi_target_group="$arg"
arg=$(getargs rd.iscsi.username -d iscsi_username=)
[ -n "$arg" ] && iscsi_username="$arg"
arg=$(getargs rd.iscsi.password -d iscsi_password)
[ -n "$arg" ] && iscsi_password="$arg"
arg=$(getargs rd.iscsi.in.username -d iscsi_in_username=)
[ -n "$arg" ] && iscsi_in_username="$arg"
arg=$(getargs rd.iscsi.in.password -d iscsi_in_password=)
[ -n "$arg" ] && iscsi_in_password="$arg"
for p in $(getargs rd.iscsi.param -d iscsi_param); do
iscsi_param="$iscsi_param --param $p"
done
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
# 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
systemctl restart iscsid
sleep 1
> /tmp/iscsi_set_initiator
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
systemctl restart iscsid
> /tmp/iscsi_set_initiator
# FIXME: iscsid is not yet ready, when the service is :-/
sleep 1
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
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
if [ -n "$DRACUT_SYSTEMD" ] && command -v systemd-run >/dev/null 2>&1; then
netroot_enc=$(systemd-escape "iscsistart_${1}")
status=$(systemctl is-active "$netroot_enc" 2>/dev/null)
is_active=$?
if [ $is_active -ne 0 ]; then
if [ "$status" != "activating" ] && ! systemctl is-failed "$netroot_enc" >/dev/null 2>&1; then
systemd-run --service-type=oneshot --remain-after-exit --quiet \
--description="Login iSCSI Target $iscsi_target_name" \
-p 'DefaultDependencies=no' \
--unit="$netroot_enc" -- \
$(command -v iscsistart) \
-i "$iscsi_initiator" -t "$iscsi_target_name" \
-g "$iscsi_target_group" -a "$iscsi_target_ip" \
-p "$iscsi_target_port" \
${iscsi_username:+-u "$iscsi_username"} \
${iscsi_password:+-w "$iscsi_password"} \
${iscsi_in_username:+-U "$iscsi_in_username"} \
${iscsi_in_password:+-W "$iscsi_in_password"} \
${iscsi_iface_name:+--param "iface.iscsi_ifacename=$iscsi_iface_name"} \
${iscsi_netdev_name:+--param "iface.net_ifacename=$iscsi_netdev_name"} \
${iscsi_param} >/dev/null 2>&1 \
&& { > $hookdir/initqueue/work ; }
while : ; do
status=$(systemctl is-active "$netroot_enc" 2>/dev/null)
[ "$status" != "activating" ] && break
sleep 1
done
else
systemctl --no-block restart "$netroot_enc" >/dev/null 2>&1 \
&& { > $hookdir/initqueue/work ; }
fi
fi
else
iscsistart -i "$iscsi_initiator" -t "$iscsi_target_name" \
-g "$iscsi_target_group" -a "$iscsi_target_ip" \
-p "$iscsi_target_port" \
${iscsi_username:+-u "$iscsi_username"} \
${iscsi_password:+-w "$iscsi_password"} \
${iscsi_in_username:+-U "$iscsi_in_username"} \
${iscsi_in_password:+-W "$iscsi_in_password"} \
${iscsi_iface_name:+--param "iface.iscsi_ifacename=$iscsi_iface_name"} \
${iscsi_netdev_name:+--param "iface.net_ifacename=$iscsi_netdev_name"} \
${iscsi_param} \
&& { > $hookdir/initqueue/work ; }
fi
netroot_enc=$(str_replace "$1" '/' '\2f')
echo 'started' > "/tmp/iscsistarted-iscsi:${netroot_enc}"
return 0
}
ret=0
if [ "$netif" != "timeout" ] && getargbool 1 rd.iscsi.waitnet; then
all_ifaces_setup || exit 0
fi
if [ "$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" ]; then
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
Zerion Mini Shell 1.0