#!/usr/sbin/sh
#
# Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
#
#
# This script is used to reconfigure fabric device(s) which were configured
# prior to boot.  The fcadm command used below is an expert level command
# and has a restrictive usage for boot time reconfiguration of fabric
# devices.
#
# DO NOT USE the command for any other purpose.
#

PATH=/usr/bin:/usr/sbin

#
# Translate from old NPIV physical path format fp@x,0 to new format fp@0,x.
# Prints translated path or nothing if not in the correct format.
#
function translate_npiv_path
{
	echo "$1" | sed -n 's/fp@\([0-9a-f]\{1,\}\),0:fc$/fp@0,\1:fc/p'
}

#
# Translate from old NPIV physical path fp@x,0 to physical path of physical
# port fp@0,0. Prints translated path or nothing if not in the correct format.
#
function npiv_phys_port_path
{
	echo "$1" | sed -n 's/fp@[0-9a-f]\{1,\},0:fc$/fp@0,0:fc/p'
}

#
# Get physical port WWN from /devices path.
# Prints port WWN or nothing if not found.
#
function get_port_wwn_by_path
{
	typeset ppath="$1"
	typeset cfgpath=
	typeset physpath=
	typeset pwwn=

	fcinfo hba-port | egrep 'HBA Port WWN|OS Device Name' | \
	    cut -d ':' -f 2 | while read pwwn; do
		read cfgpath
		physpath="$(readlink "$cfgpath")"
		if [ "$physpath" = "$ppath" ] ; then
			echo $pwwn
			return
		fi	
	    done	
}

#
# Determine if physical port has NPIV ports configured.
# Returns 0 if port has NPIV ports configured, != 0 if not.
#
function port_has_npiv_ports
{
	typeset pwwn="$1"

	svcprop -p npiv-port-list/port_list network/npiv_config | \
	    grep "$pwwn" >/dev/null 2>&1
}

#
# Check if argument is an NPIV port path in old format and if so,
# translate it to the new format. Prints translated path or nothing
# if this is not an NPIV port path.
#
# Returns 0 if it made any changes, != 0 otherwise.
#
function check_translate_npiv_path
{
	typeset vpath="$1"
	typeset ppath=
	typeset pwwn=

	# Get /devices path of physical port
	ppath="$(npiv_phys_port_path "$vpath")"
	if [ -z "$ppath" ] || [ "$ppath" = "$vpath" ] ; then
		return 1
	fi

	# Get WWN of physical port
	pwwn="$(get_port_wwn_by_path "$ppath")"
	if [ -z "$pwwn" ] ; then
		return 1
	fi

	# Check NPIV port(s) are configured for physical port
	port_has_npiv_ports "$pwwn"
	if [ $? -ne 0 ] ; then
		return 1
	fi		

	# We will assume that we actually have an NPIV port since
	# NPIV ports and multiple-ports-per-FCA-node do not mix
	translate_npiv_path "$vpath"
	return 0
}

#
# Upgrade /dev/cfg/c* symlinks for NPIV ports from old format fp@x,0 to
# new format fp@0,x.
#
function upgrade_npiv_links
{
	typeset changed="false"
	typeset lname=
	typeset lnew=
	typeset ltgt=
	typeset upgraded=

	# Check if already upgraded
	upgraded="$(svccfg -s svc:/network/npiv_config:default listprop \
	    -o value general/linkupd 2>/dev/null)"
	if [ $? -eq 0 ] && [ "$upgraded" = " true" ] ; then
		return
	fi

	# Update devlinks
	for lname in /dev/cfg/c*; do
		if [ -L "$lname" ] ; then
			ltgt="$(readlink "$lname")"
			lnew="$(check_translate_npiv_path "$ltgt")"
			if [ $? -eq 0 ] ; then
				rm "$lname"
				ln -s "$lnew" "$lname"
				changed="true"
			fi
		fi
	done

	# Update devlink cache before creating NPIV ports
	if [ "$changed" = "true" ] ; then
		devfsadm -i fp
	fi

	svccfg -s svc:/network/npiv_config:default setprop general/linkupd = \
	    boolean: true
}

upgrade_npiv_links

fcadm create-port-list