97 lines
2.4 KiB
Bash
Executable File
97 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# sas_switch_id
|
|
#
|
|
# Callout script for multipathd to obtain disk UUIDs. Combine the UUID
|
|
# from the scsi_id program with the SAS switch port number and enclosure
|
|
# bay number, if available. This naming convention enables easier
|
|
# identification of the physical drive location when multiple disk
|
|
# enclosures are accessed via a SAS switch. For other storage
|
|
# topologies just return the undecorated UUID of the drive.
|
|
|
|
PHYS_PER_PORT=4
|
|
DEV=
|
|
|
|
usage() {
|
|
cat << EOF
|
|
Usage: sas_switch_id [-d disk] [-p phys_per_port]
|
|
-d Basename of the disk device [default=none]
|
|
-p Number of PHYs per switch port [default=${PHYS_PER_PORT}]
|
|
-h Show this message
|
|
EOF
|
|
exit 0
|
|
}
|
|
|
|
while getopts 'd:p:h' OPTION; do
|
|
case ${OPTION} in
|
|
d)
|
|
DEV=${OPTARG}
|
|
;;
|
|
p)
|
|
PHYS_PER_PORT=${OPTARG}
|
|
;;
|
|
h)
|
|
usage
|
|
;;
|
|
esac
|
|
done
|
|
|
|
if [ -z "$DEV" ] ; then
|
|
echo "Error: missing required option -d"
|
|
exit 1
|
|
fi
|
|
|
|
UUID=`/lib/udev/scsi_id --whitelisted --device=/dev/$DEV`
|
|
if [ $? != 0 -o -z "$UUID" ] ; then
|
|
exit 1
|
|
fi
|
|
sys_path=`udevadm info -q path -p /sys/block/$DEV`
|
|
dirs=(`echo "$sys_path" | tr / ' '`)
|
|
switch_port_dir="/sys"
|
|
|
|
# Get path up to /sys/.../hostX
|
|
for (( i=0; i<${#dirs[*]}; i++ )); do
|
|
d=${dirs[$i]}
|
|
switch_port_dir=$switch_port_dir/$d
|
|
echo $d | egrep -q -e '^host[0-9]+$' && break
|
|
done
|
|
|
|
if [ $i = ${#dirs[*]} ] ; then
|
|
echo $UUID
|
|
exit 0
|
|
fi
|
|
|
|
# The directory three levels beneath /sys/.../hostX contains
|
|
# symlinks to phy devices that reveal the switch port number.
|
|
# Lowest phy number is $PHYS_PER_PORT*switch_port_number.
|
|
for (( j=(($i+1)) ; j<(($i+4)); j++ )); do
|
|
switch_port_dir=$switch_port_dir/${dirs[$j]}
|
|
done
|
|
pushd $switch_port_dir > /dev/null
|
|
PHY=`ls -d phy* 2>/dev/null | head -1 | awk -F: '{print $NF}'`
|
|
PORT=$(( $PHY / $PHYS_PER_PORT ))
|
|
popd > /dev/null
|
|
if [ -z "$PHY" ] ; then
|
|
echo $UUID
|
|
exit 0
|
|
fi
|
|
|
|
# Look in /sys/.../sas_device/end_device-X for the bay_identifier
|
|
# attribute.
|
|
end_device_dir=$switch_port_dir
|
|
for (( k=$j ; k<${#dirs[*]} ; k++ )); do
|
|
d=${dirs[$k]}
|
|
end_device_dir=$end_device_dir/$d
|
|
if echo $d | egrep -q -e '^end_device' ; then
|
|
end_device_dir=$end_device_dir/sas_device/$d
|
|
break
|
|
fi
|
|
done
|
|
SLOT=`cat $end_device_dir/bay_identifier 2>/dev/null`
|
|
if [ -z "$SLOT" ] ; then
|
|
echo $UUID
|
|
exit 0
|
|
fi
|
|
|
|
echo "$UUID-switch-port:$PORT-slot:$SLOT"
|