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0403-95lunmask-Add-module-to-handle-LUN-masking...
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File 0403-95lunmask-Add-module-to-handle-LUN-masking.patch of Package dracut.10716
From 55adce6c6676c83f9130c3b6e0391bfcb5c92320 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke <hare@suse.de> Date: Wed, 11 Nov 2015 12:20:33 +0100 Subject: [PATCH] 95lunmask: Add module to handle LUN masking Using the module option 'scsi_mod.scan=manual' this implements LUN masking by selectively enable only those devices required for booting. References: bsc#954600,FATE#319786 Signed-off-by: Hannes Reinecke <hare@suse.de> --- modules.d/95lunmask/fc_transport_scan_lun.sh | 26 ++++++++++ modules.d/95lunmask/module-setup.sh | 70 +++++++++++++++++++++++++++ modules.d/95lunmask/parse-lunmask.sh | 40 +++++++++++++++ modules.d/95lunmask/sas_transport_scan_lun.sh | 26 ++++++++++ 4 files changed, 162 insertions(+) create mode 100755 modules.d/95lunmask/fc_transport_scan_lun.sh create mode 100755 modules.d/95lunmask/module-setup.sh create mode 100755 modules.d/95lunmask/parse-lunmask.sh create mode 100755 modules.d/95lunmask/sas_transport_scan_lun.sh diff --git a/modules.d/95lunmask/fc_transport_scan_lun.sh b/modules.d/95lunmask/fc_transport_scan_lun.sh new file mode 100755 index 0000000..d9f84a3 --- /dev/null +++ b/modules.d/95lunmask/fc_transport_scan_lun.sh @@ -0,0 +1,26 @@ +#!/bin/bash +# +# fc_transport_lun_scan +# +# Selectively enable individual LUNs behind an FC remote port +# +# ACTION=="add", SUBSYSTEM=="fc_transport", ATTR{port_name}=="wwpn", \ +# PROGRAM="fc_transport_lun_scan lun" +# + +[ -z $DEVPATH ] && exit 1 + +if [ -n "$1" ] ; then + LUN=$1 +else + LUN=- +fi +ID=${DEVPATH##*/rport-} +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 $CHANNEL $TARGET $LUN > /sys/class/scsi_host/host$HOST/scan diff --git a/modules.d/95lunmask/module-setup.sh b/modules.d/95lunmask/module-setup.sh new file mode 100755 index 0000000..6afaed2 --- /dev/null +++ b/modules.d/95lunmask/module-setup.sh @@ -0,0 +1,70 @@ +#!/bin/bash +# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*- +# ex: ts=8 sw=4 sts=4 et filetype=sh + +# called by dracut +cmdline() { + get_lunmask() { + local _dev=$1 + local _devpath=$(cd -P /sys/dev/block/$_dev ; echo $PWD) + local _sdev _lun _rport _end_device _classdev _wwpn _sas_address + + [ "${_devpath#*/sd}" == "$_devpath" ] && return 1 + _sdev="${_devpath%%/block/*}" + _lun="${_sdev##*:}" + # Check for FibreChannel + _rport="${_devpath##*/rport-}" + if [ "$_rport" != "$_devpath" ] ; then + _rport="${_rport%%/*}" + _classdev="/sys/class/fc_remote_ports/rport-${_rport}" + [ -d "$_classdev" ] || return 1 + _wwpn=$(cat ${_classdev}/port_name) + echo "rd.lunmask=fc,${_wwpn},${_lun}" + return 0 + fi + # Check for SAS + _end_device="${_devpath##*/end_device-}" + if [ "$_end_device" != "$_devpath" ] ; then + _end_device="${_end_device%%/*}" + _classdev="/sys/class/sas_device/end_device-${_end_device}" + [ -e "$_classdev" ] || return 1 + _sas_address=$(cat ${_classdev}/sas_address) + echo "rd.lunmask=sas,${_sas_address},${_lun}" + return 0 + fi + return 1 + } + [[ $hostonly ]] || [[ $mount_needs ]] && { + for_each_host_dev_and_slaves_all get_lunmask + } | sort | uniq +} + +# called by dracut +check() { + [[ $hostonly ]] || [[ $mount_needs ]] && { + [ -w /sys/module/scsi_mod/parameters/scan ] || return 255 + scan_type=$(cat /sys/module/scsi_mod/parameters/scan) + [ "$scan_type" = "manual" ] && return 0 + return 255 + } + return 0 +} + +# called by dracut +depends() { + return 0 +} + +# called by dracut +install() { + inst_script "$moddir/fc_transport_scan_lun.sh" /usr/lib/udev/fc_transport_scan_lun.sh + inst_script "$moddir/sas_transport_scan_lun.sh" /usr/lib/udev/sas_transport_scan_lun.sh + inst_hook cmdline 30 "$moddir/parse-lunmask.sh" + if [[ $hostonly_cmdline == "yes" ]] ; then + local _lunmask + + for _lunmask in $(cmdline) ; do + printf "%s\n" "$_lunmask" >> "${initdir}/etc/cmdline.d/95lunmask.conf" + done + fi +} diff --git a/modules.d/95lunmask/parse-lunmask.sh b/modules.d/95lunmask/parse-lunmask.sh new file mode 100755 index 0000000..6646876 --- /dev/null +++ b/modules.d/95lunmask/parse-lunmask.sh @@ -0,0 +1,40 @@ +#!/bin/sh +# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*- +# ex: ts=8 sw=4 sts=4 et filetype=sh + +create_udev_rule() { + local transport=$1 + local tgtid=$2 + local lun=$3 + local _rule=/etc/udev/rules.d/51-${transport}-lunmask-${tgtid}.rules + local _cu_type _dev_type + + [ -e ${_rule} ] && return 0 + + if [ ! -f "$_rule" ] ; then + if [ "$transport" = "fc" ] ; then + cat > $_rule <<EOF +ACTION=="add", SUBSYSTEM=="fc_remote_ports", ATTR{port_name}=="$tgtid", PROGRAM="fc_transport_scan_lun.sh $lun" +EOF + elif [ "$transport" = "sas" ] ; then + cat > $_rule <<EOF +ACTION=="add", SUBSYSTEM=="sas_device", ATTR{sas_address}=="$tgtid", PROGRAM="sas_transport_scan_lun.sh $lun" +EOF + fi + fi +} + +for lunmask_arg in $(getargs rd.lunmask); do + ( + local OLDIFS="$IFS" + local IFS="," + set $lunmask_arg + IFS="$OLDIFS" + if [ -d /sys/module/scsi_mod ] ; then + echo -n "manual" > /sys/module/scsi_mod/parameters/scan + elif [ ! -f /etc/modprobe.d/95lunmask.conf ] ; then + echo "options scsi_mod scan=manual" > /etc/modprobe.d/95lunmask.conf + fi + create_udev_rule $1 $2 $3 + ) +done diff --git a/modules.d/95lunmask/sas_transport_scan_lun.sh b/modules.d/95lunmask/sas_transport_scan_lun.sh new file mode 100755 index 0000000..f7702f8 --- /dev/null +++ b/modules.d/95lunmask/sas_transport_scan_lun.sh @@ -0,0 +1,26 @@ +#!/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 -- 2.6.6
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