/usr/lib/dracut/modules.d/95lunmask/sas_transport_scan_lun.sh is in dracut-core 047-2.
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 | #!/bin/bash
#
# sas_transport_lun_scan
#
# Selectively enable individual LUNs behind a SAS end device
#
# ACTION=="add", SUBSYSTEM=="sas_transport", ATTR{sas_address}=="sas_addr", \
# PROGRAM="sas_transport_lun_scan lun"
#
[ -z $DEVPATH ] && exit 1
if [ -n "$1" ] ; then
LUN=$1
else
LUN=-
fi
ID=${DEVPATH##*/end_device-}
HOST=${ID%%:*}
CHANNEL=${ID%%-*}
CHANNEL=${CHANNEL#*:}
if [ -f /sys$DEVPATH/scsi_target_id ] ; then
TARGET=$(cat /sys$DEVPATH/scsi_target_id)
fi
[ -z "$TARGET" ] && exit 1
echo 0 $TARGET $LUN > /sys/class/scsi_host/host$HOST/scan
|