#!/bin/sh
# SPDX-License-Identifier: GPL-3.0-only

set -e

if [ "$1" = "setup" ]
then
    . /usr/share/initramfs-tools/hook-functions
    copy_exec /bin/grep
    copy_exec /bin/sleep
    copy_exec /usr/sbin/iscsiadm
    copy_exec /usr/sbin/iscsid
    # hm, not sure why expr is copied
    copy_exec /usr/bin/expr
    copy_file config /etc/iscsi/iscsid.conf
    copy_file config /etc/iscsi/initiatorname.iscsi
    # needed to resolve UIDs (LP: #1922976)
    copy_exec /usr/lib/*/libnss_files.so.*
    exit 0
fi

# if not present in the environment, then fake a trivial passwd file (LP: #1922976)
if [ ! -e /etc/passwd ] ; then
    echo "root:x:0:0:root:/:/bin/sh" > /etc/passwd
fi

# re-establish connection and logout during shutdown
# if initramfs did bring up open-iscsi on boot
[ -f /open-iscsi.interface ] || exit 0

iscsid

# After restarting iscsid, wait for an active connection.
# Limit the wait time in case of unexpected failure of iscsid.
MAX_RETRIES=30
RETRY=0
while ! iscsiadm -m session -P 1 | grep -q "iSCSI Connection State: LOGGED IN"; do
    RETRY=$(($RETRY + 1))
    if [ $RETRY -gt $MAX_RETRIES ]; then
        echo "Unexpected iSCSI Connection State, forcing iSCSI logout."
        break
    fi
    sleep 1
done

# Issue an iSCSI logout.
iscsiadm -m node -u