xen/block-npiv

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#!/bin/bash
# Usage: block-npiv [add npiv | remove dev]
dir=$(dirname "$0")
. "$dir/block-npiv-common.sh"
. "$dir/block-common.sh"
#set -x
#command=$1
case "$command" in
add)
# Params is one big arg, with fields separated by hyphens:
# single path:
# VPWWPN-TGTWWPN-LUN#
# multipath:
# {VPWWPN1.VPWWPN2....VPWWPNx}-{TGTWWPN1.TGTWWPN2....TGTWWPNx}-LUN#
# arg 1 - VPORT's WWPN
# arg 2 - Target's WWPN
# arg 3 - LUN # on Target
# no wwn contains a leading 0x - it is a 16 character hex value
# You may want to optionally pick a specific adapter ?
par=`xenstore-read $XENBUS_PATH/params` || true
NPIVARGS=(${par//-/ })
wc=${#NPIVARGS[@]}
if [ $wc -eq 5 ]; then
# support old syntax
# FABRIC-VPWWPN-VPWWNN-TGTWWPN-LUN
VPORTWWPNS=${NPIVARGS[1]}
VPORTWWNNS=${NPIVARGS[2]}
TGTWWPNS=${NPIVARGS[3]}
LUN=${NPIVARGS[4]}
elif [ $wc -eq 3 ]; then
# new syntax
VPORTWWPNS=${NPIVARGS[0]}
TGTWWPNS=${NPIVARGS[1]}
LUN=${NPIVARGS[2]}
else
# wrong syntax
exit 1
fi
# Ensure we compare everything using lower-case hex characters
TGTWWPNS=`echo $TGTWWPNS | tr A-Z a-z |sed 's/[{.}]/ /g'`
VPORTWWPNS=`echo $VPORTWWPNS | tr A-Z a-z |sed 's/[{.}]/ /g'`
# Only one VPWWNN is supported
VPORTWWNN=`echo $VPORTWWNNS | tr A-Z a-z | sed -e 's/\..*//g' -e 's/{//'`
claim_lock "npiv"
paths=0
for VPORTWWPN in $VPORTWWPNS; do
find_vhost $VPORTWWPN
if test -z "$vhost" ; then
create_vport $VPORTWWPN $VPORTWWNN
if [ $? -ne 0 ] ; then exit 2; fi
sleep 8
find_vhost $VPORTWWPN
if test -z "$vhost" ; then exit 3; fi
fi
for TGTWWPN in $TGTWWPNS; do
find_sdev $vhost $TGTWWPN $LUN
if test -z "$dev"; then
echo "- - -" > /sys/class/scsi_host/$vhost/scan
sleep 2
find_sdev $vhost $TGTWWPN $LUN
fi
if test -z "$dev"; then
exit 4
fi
paths=$(($paths+1))
done
done
release_lock "npiv"
if test $paths -gt 1; then
xenstore-write $XENBUS_PATH/multipath 1
/etc/init.d/multipathd start
if test $? -ne 0 ; then exit 4; fi
dm=`multipath -l /dev/$dev | grep dm | cut -f2 -d' '`
else
xenstore-write $XENBUS_PATH/multipath 0
dm=$dev
fi
if test ! -z "$dm"; then
xenstore-write $XENBUS_PATH/node /dev/$dm
write_dev /dev/$dm
exit 0
fi
exit 4
;;
remove)
node=`xenstore-read $XENBUS_PATH/node` || true
multipath=`xenstore-read $XENBUS_PATH/multipath` || true
# this is really screwy. the first delete of a lun will
# terminate the entire vport (all luns)
if test $multipath = 1; then
par=`xenstore-read $XENBUS_PATH/params` || true
NPIVARGS=(${par//-/ })
wc=${#NPIVARGS[@]}
if [ $wc -eq 5 ]; then
# old syntax
# FABRIC-VPWWPN-VPWWNN-TGTWWPN-LUN
VPORTWWPNS=${NPIVARGS[1]}
elif [ $wc -eq 3 ]; then
# new syntax
VPORTWWPNS=${NPIVARGS[0]}
fi
VPORTWWPNS=`echo $VPORTWWPNS | tr A-Z a-z |sed 's/[{.}]/ /g'`
for VPORTWWPN in $VPORTWWPNS; do
find_vhost $VPORTWWPN
if test -z "$vhost" ; then exit 5; fi
flush_nodes_on_vhost $vhost
delete_vhost $vhost
done
else
dev=$node; dev=${dev#/dev/}
find_vhost_from_dev $dev
if test -z "$vhost" ; then exit 5; fi
flush_nodes_on_vhost $vhost
delete_vhost $vhost
fi
exit 0
;;
esac