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/usr/lib/udev/fc_wwpn_id

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#!/bin/bash
#
# fc_wwpn_id
#
# Generates device node names links based on FC WWPN
# Copyright (c) 2016 Hannes Reinecke, SUSE Linux GmbH
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation version 2 of the License.
#

DEVPATH=$1
SCSIPATH=$(cd -P "/sys$DEVPATH/device" || exit; echo "$PWD")

d=$SCSIPATH
[ -d "$d/scsi_disk" ] || exit 0
target_lun=${d##*:}

while [ -n "$d" ] ; do
    d=${d%/*}
    e=${d##*/}
    case "$e" in
	rport*)
	    rport=$e
	    rport_dir="/sys/class/fc_remote_ports/$rport"
	    if [ -d "$rport_dir" ] ; then
		rport_wwpn=$(cat "$rport_dir/port_name")
	    fi
	    ;;
	host*)
	    host=$e
	    host_dir="/sys/class/fc_host/$host"
	    if [ -d "$host_dir" ] ; then
		host_wwpn=$(cat "$host_dir/port_name")
		break;
	    fi
    esac
done

if [ -n "$rport_wwpn" ] || [ -n "$host_wwpn" ] ; then
    echo "FC_TARGET_LUN=$target_lun"
fi

if [ -n "$rport_wwpn" ] ; then
    echo "FC_TARGET_WWPN=$rport_wwpn"
fi

if [ -n "$host_wwpn" ] ; then
    echo "FC_INITIATOR_WWPN=$host_wwpn"
fi

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Name	Size	Perms	Modified	Actions
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rules.d DIR	-	drwxr-xr-x	2025-10-17 08:21:27	Edit Download recursive recursive
ata_id	40.73 KB	lrwxr-xr-x	2025-04-22 01:58:57	Edit Download recursive recursive
cdrom_id	32.51 KB	lrwxr-xr-x	2025-04-22 01:58:57	Edit Download recursive recursive
collect	20.57 KB	lrwxr-xr-x	2025-04-22 01:58:57	Edit Download recursive recursive
fc_wwpn_id	1.10 KB	lrwxr-xr-x	2022-10-08 11:49:23	Edit Download recursive recursive
fido_id	16.43 KB	lrwxr-xr-x	2025-04-22 01:58:57	Edit Download recursive recursive
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prefixdevname	1.46 MB	lrwxr-xr-x	2019-12-16 19:52:38	Edit Download recursive recursive
rename_device	16.46 KB	lrwxr-xr-x	2022-11-10 08:01:00	Edit Download recursive recursive
scsi_id	53.70 KB	lrwxr-xr-x	2025-04-22 01:58:57	Edit Download recursive recursive
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