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#!/bin/bash
# called by dracut
check() {
local _rootdev
# If our prerequisites are not met, fail anyways.
require_binaries iscsi-iname iscsiadm iscsid || return 1
# If hostonly was requested, fail the check if we are not actually
# booting from root.
is_iscsi() {
local _dev=$1
[[ -L "/sys/dev/block/$_dev" ]] || return
cd "$(readlink -f "/sys/dev/block/$_dev")"
until [[ -d sys || -d iscsi_session ]]; do
cd ..
done
[[ -d iscsi_session ]]
}
[[ $hostonly ]] || [[ $mount_needs ]] && {
pushd . >/dev/null
for_each_host_dev_and_slaves is_iscsi || return 255
popd >/dev/null
}
return 0
}
get_ibft_mod() {
local ibft_mac=$1
local iface_mac iface_mod
# Return the iSCSI offload module for a given MAC address
for iface_desc in $(iscsiadm -m iface | cut -f 2 -d ' '); do
iface_mod=${iface_desc%%,*}
iface_mac=${iface_desc#*,}
iface_mac=${iface_mac%%,*}
if [ "$ibft_mac" = "$iface_mac" ] ; then
echo $iface_mod
return 0
fi
done
}
install_ibft() {
# When iBFT / iscsi_boot is detected:
# - Use 'ip=ibft' to set up iBFT network interface
# Note: bnx2i is using a different MAC address of iSCSI offloading
# so the 'ip=ibft' parameter must not be set
# - specify firmware booting cmdline parameter
for d in /sys/firmware/* ; do
if [ -d ${d}/ethernet0 ] ; then
read ibft_mac < ${d}/ethernet0/mac
ibft_mod=$(get_ibft_mod $ibft_mac)
fi
if [ -z "$ibft_mod" ] && [ -d ${d}/ethernet1 ] ; then
read ibft_mac < ${d}/ethernet1/mac
ibft_mod=$(get_ibft_mod $ibft_mac)
fi
if [ -d ${d}/initiator ] ; then
if [ ${d##*/} = "ibft" ] && [ "$ibft_mod" != "bnx2i" ] ; then
echo -n "rd.iscsi.ibft=1 "
fi
echo -n "rd.iscsi.firmware=1"
fi
done
}
install_iscsiroot() {
local devpath=$1
local scsi_path iscsi_lun session c d conn host flash
local iscsi_session iscsi_address iscsi_port iscsi_targetname iscsi_tpgt
local bootproto
scsi_path=${devpath%%/block*}
[ "$scsi_path" = "$devpath" ] && return 1
iscsi_lun=${scsi_path##*:}
[ "$iscsi_lun" = "$scsi_path" ] && return 1
session=${devpath%%/target*}
[ "$session" = "$devpath" ] && return 1
iscsi_session=${session##*/}
[ "$iscsi_session" = "$session" ] && return 1
host=${session%%/session*}
[ "$host" = "$session" ] && return 1
iscsi_host=${host##*/}
for flash in ${host}/flashnode_sess-* ; do
[ -f "$flash" ] || continue
[ ! -e "$flash/is_boot_target" ] && continue
is_boot=$(cat $flash/is_boot_target)
if [ $is_boot -eq 1 ] ; then
# qla4xxx flashnode session; skip iBFT discovery
iscsi_initiator=$(cat /sys/class/iscsi_host/${iscsi_host}/initiatorname)
echo "rd.iscsi.initiator=${iscsi_initiator}"
return;
fi
done
for d in ${session}/* ; do
case $d in
*connection*)
c=${d##*/}
conn=${d}/iscsi_connection/${c}
if [ -d ${conn} ] ; then
iscsi_address=$(cat ${conn}/persistent_address)
iscsi_port=$(cat ${conn}/persistent_port)
fi
;;
*session)
if [ -d ${d}/${iscsi_session} ] ; then
iscsi_initiator=$(cat ${d}/${iscsi_session}/initiatorname)
iscsi_targetname=$(cat ${d}/${iscsi_session}/targetname)
fi
;;
esac
done
[ -z "$iscsi_address" ] && return
local_address=$(ip -o route get to $iscsi_address | sed -n 's/.*src \([0-9a-f.:]*\).*/\1/p')
ifname=$(ip -o route get to $iscsi_address | sed -n 's/.*dev \([^ ]*\).*/\1/p')
# follow ifcfg settings for boot protocol
for _path in \
"/etc/sysconfig/network-scripts/ifcfg-$ifname" \
"/etc/sysconfig/network/ifcfg-$ifname" \
; do
[ -r "$_path" ] && bootproto=$(sed -n "s/BOOTPROTO='\?\([[:alpha:]]*6\?\)4\?/\1/p" "$_path")
done
if [ $bootproto ]; then
printf 'ip=%s:%s ' ${ifname} ${bootproto}
else
printf 'ip=%s:static ' ${ifname}
fi
if [ -e /sys/class/net/$ifname/address ] ; then
ifmac=$(cat /sys/class/net/$ifname/address)
printf 'ifname=%s:%s ' ${ifname} ${ifmac}
fi
if [ -n "$iscsi_address" -a -n "$iscsi_targetname" ] ; then
if [ -n "$iscsi_port" -a "$iscsi_port" -eq 3260 ] ; then
iscsi_port=
fi
if [ -n "$iscsi_lun" -a "$iscsi_lun" -eq 0 ] ; then
iscsi_lun=
fi
# In IPv6 case rd.iscsi.initatior= must pass address in [] brackets
case "$iscsi_address" in
*:*)
iscsi_address="[$iscsi_address]"
;;
esac
# Must be two separate lines, so that "sort | uniq" commands later
# can sort out rd.iscsi.initiator= duplicates
echo "rd.iscsi.initiator=${iscsi_initiator}"
echo "netroot=iscsi:${iscsi_address}::${iscsi_port}:${iscsi_lun}:${iscsi_targetname}"
echo "rd.neednet=1"
fi
return 0
}
install_softiscsi() {
[ -d /sys/firmware/ibft ] && return 0
is_softiscsi() {
local _dev=$1
local iscsi_dev
[[ -L "/sys/dev/block/$_dev" ]] || return
iscsi_dev=$(cd -P /sys/dev/block/$_dev; echo $PWD)
install_iscsiroot $iscsi_dev
}
for_each_host_dev_and_slaves_all is_softiscsi || return 255
return 0
}
# called by dracut
depends() {
echo network rootfs-block
}
# called by dracut
installkernel() {
local _arch=$(uname -m)
local _funcs='iscsi_register_transport'
instmods bnx2i qla4xxx cxgb3i cxgb4i be2iscsi qedi
hostonly="" instmods iscsi_tcp iscsi_ibft crc32c iscsi_boot_sysfs
if [ "$_arch" = "s390" -o "$_arch" = "s390x" ]; then
_s390drivers="=drivers/s390/scsi"
fi
dracut_instmods -o -s ${_funcs} =drivers/scsi ${_s390drivers:+"$_s390drivers"}
}
# called by dracut
cmdline() {
local _iscsiconf=$(install_ibft)
{
if [ "$_iscsiconf" ] ; then
echo ${_iscsiconf}
else
install_softiscsi
fi
} | sort | uniq
}
# called by dracut
install() {
inst_multiple -o iscsiuio
inst_libdir_file 'libgcc_s.so*'
inst_multiple umount iscsi-iname iscsiadm iscsid
inst_multiple -o \
$systemdsystemunitdir/iscsid.socket \
$systemdsystemunitdir/iscsid.service \
$systemdsystemunitdir/iscsiuio.service \
$systemdsystemunitdir/iscsiuio.socket \
$systemdsystemunitdir/sockets.target.wants/iscsid.socket \
$systemdsystemunitdir/sockets.target.wants/iscsiuio.socket
if [[ $hostonly ]]; then
inst_dir $(/usr/bin/find /etc/iscsi)
else
inst_simple /etc/iscsi/iscsid.conf
fi
# Detect iBFT and perform mandatory steps
if [[ $hostonly_cmdline == "yes" ]] ; then
local _iscsiconf=$(cmdline)
[[ $_iscsiconf ]] && printf "%s\n" "$_iscsiconf" >> "${initdir}/etc/cmdline.d/95iscsi.conf"
fi
inst_hook cmdline 90 "$moddir/parse-iscsiroot.sh"
inst_hook cleanup 90 "$moddir/cleanup-iscsi.sh"
inst "$moddir/iscsiroot.sh" "/sbin/iscsiroot"
if ! dracut_module_included "systemd"; then
inst "$moddir/mount-lun.sh" "/bin/mount-lun.sh"
else
inst_multiple -o \
$systemdsystemunitdir/iscsi.service \
$systemdsystemunitdir/iscsid.service \
$systemdsystemunitdir/iscsid.socket \
$systemdsystemunitdir/iscsiuio.service \
$systemdsystemunitdir/iscsiuio.socket \
iscsiadm iscsid
for i in \
iscsid.socket \
iscsiuio.socket \
; do
systemctl -q --root "$initdir" enable "$i"
done
for i in \
iscsid.service \
iscsiuio.service \
; do
systemctl -q --root "$initdir" add-wants basic.target "$i"
done
# Make sure iscsid is started after dracut-cmdline and ready for the initqueue
mkdir -p "${initdir}/$systemdsystemunitdir/iscsid.service.d"
(
echo "[Unit]"
echo "After=dracut-cmdline.service"
echo "Before=dracut-initqueue.service"
) > "${initdir}/$systemdsystemunitdir/iscsid.service.d/dracut.conf"
# The iscsi deamon does not need to wait for any storage inside initrd
mkdir -p "${initdir}/$systemdsystemunitdir/iscsid.socket.d"
(
echo "[Unit]"
echo "DefaultDependencies=no"
echo "Conflicts=shutdown.target"
echo "Before=shutdown.target sockets.target"
) > "${initdir}/$systemdsystemunitdir/iscsid.socket.d/dracut.conf"
mkdir -p "${initdir}/$systemdsystemunitdir/iscsiuio.socket.d"
(
echo "[Unit]"
echo "DefaultDependencies=no"
echo "Conflicts=shutdown.target"
echo "Before=shutdown.target sockets.target"
) > "${initdir}/$systemdsystemunitdir/iscsiuio.socket.d/dracut.conf"
fi
inst_dir /var/lib/iscsi
dracut_need_initqueue
}
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