/usr/lib/dracut/modules.d/95iscsi/parse-iscsiroot.sh is in dracut-network 040+1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | #!/bin/sh
#
# Preferred format:
# root=iscsi:[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname>
# [root=*] netroot=iscsi:[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname>
#
# Legacy formats:
# [net]root=[iscsi] iscsiroot=[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname>
# [net]root=[iscsi] iscsi_firmware
#
# root= takes precedence over netroot= if root=iscsi[...]
#
# This script is sourced, so root should be set. But let's be paranoid
[ -z "$root" ] && root=$(getarg root=)
if [ -z "$netroot" ]; then
for netroot in $(getargs netroot=); do
[ "${netroot%%:*}" = "iscsi" ] && break
done
[ "${netroot%%:*}" = "iscsi" ] || unset netroot
fi
[ -z "$iscsiroot" ] && iscsiroot=$(getarg iscsiroot=)
[ -z "$iscsi_firmware" ] && getargbool 0 rd.iscsi.firmware -y iscsi_firmware && iscsi_firmware="1"
[ -n "$iscsiroot" ] && [ -n "$iscsi_firmware" ] && die "Mixing iscsiroot and iscsi_firmware is dangerous"
type write_fs_tab >/dev/null 2>&1 || . /lib/fs-lib.sh
# Root takes precedence over netroot
if [ "${root%%:*}" = "iscsi" ] ; then
if [ -n "$netroot" ] ; then
echo "Warning: root takes precedence over netroot. Ignoring netroot"
fi
netroot=$root
# if root is not specified try to mount the whole iSCSI LUN
printf 'ENV{DEVTYPE}!="partition", SYMLINK=="disk/by-path/*-iscsi-*-*", SYMLINK+="root"\n' >> /etc/udev/rules.d/99-iscsi-root.rules
root=/dev/root
write_fs_tab /dev/root
fi
# If it's not empty or iscsi we don't continue
[ -z "$netroot" ] || [ "${netroot%%:*}" = "iscsi" ] || return
if [ -n "$iscsiroot" ] ; then
[ -z "$netroot" ] && netroot=$root
# @deprecated
echo "Warning: Argument iscsiroot is deprecated and might be removed in a future"
echo "release. See 'man dracut.kernel' for more information."
# Accept iscsiroot argument?
[ -z "$netroot" ] || [ "$netroot" = "iscsi" ] || \
die "Argument iscsiroot only accepted for empty root= or [net]root=iscsi"
# Override root with iscsiroot content?
[ -z "$netroot" ] || [ "$netroot" = "iscsi" ] && netroot=iscsi:$iscsiroot
fi
# iscsi_firmware does not need argument checking
if [ -n "$iscsi_firmware" ] ; then
netroot=${netroot:-iscsi:}
modprobe -q iscsi_boot_sysfs 2>/dev/null
modprobe -q iscsi_ibft
initqueue --onetime --timeout /sbin/iscsiroot dummy "'$netroot'" "'$NEWROOT'"
fi
# If it's not iscsi we don't continue
[ "${netroot%%:*}" = "iscsi" ] || return
modprobe -q qla4xxx
modprobe -q cxgb3i
modprobe -q cxgb4i
modprobe -q bnx2i
modprobe -q be2iscsi
if [ -z "$iscsi_firmware" ] ; then
type parse_iscsi_root >/dev/null 2>&1 || . /lib/net-lib.sh
parse_iscsi_root "$netroot" || return
fi
# ISCSI actually supported?
if ! [ -e /sys/module/iscsi_tcp ]; then
modprobe -q iscsi_tcp || die "iscsiroot requested but kernel/initrd does not support iscsi"
fi
if [ -n "$netroot" ] && [ "$root" != "/dev/root" ] && [ "$root" != "dhcp" ]; then
if ! getargbool 1 rd.neednet >/dev/null || ! getarg "ip="; then
initqueue --onetime --settled /sbin/iscsiroot dummy "'$netroot'" "'$NEWROOT'"
fi
fi
netroot_enc=$(str_replace "$netroot" '/' '\2f')
echo "[ -f '/tmp/iscsistarted-$netroot_enc' ]" > $hookdir/initqueue/finished/iscsi_started.sh
# Done, all good!
rootok=1
# Shut up init error check
[ -z "$root" ] && root="iscsi"
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