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freebsd-src/udev/vdev_id
Matthew Heller cefef28e98
vdev_id: multi-lun disks & slot num zero pad 
Add ability to generate disk names that contain both a slot number
and a lun number in order to support multi-actuator SAS hard drives
with multiple luns. Also add the ability to zero pad slot numbers to
a desired digit length for easier sorting.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matthew Heller <matthew.f.heller@accre.vanderbilt.edu>
Closes #16603
2024-10-08 17:43:04 -07:00

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#!/bin/sh
#
# vdev_id: udev helper to generate user-friendly names for JBOD disks
#
# This script parses the file /etc/zfs/vdev_id.conf to map a
# physical path in a storage topology to a channel name. The
# channel name is combined with a disk enclosure slot number to
# create an alias that reflects the physical location of the drive.
# This is particularly helpful when it comes to tasks like replacing
# failed drives. Slot numbers may also be re-mapped in case the
# default numbering is unsatisfactory. The drive aliases will be
# created as symbolic links in /dev/disk/by-vdev.
#
# The currently supported topologies are sas_direct and sas_switch.
# A multipath mode is supported in which dm-mpath devices are
# handled by examining the first-listed running component disk. In
# multipath mode the configuration file should contain a channel
# definition with the same name for each path to a given enclosure.
#
# The alias keyword provides a simple way to map already-existing
# device symlinks to more convenient names. It is suitable for
# small, static configurations or for sites that have some automated
# way to generate the mapping file.
#
#
# Some example configuration files are given below.
# #
# # Example vdev_id.conf - sas_direct.
# #
#
# multipath no
# topology sas_direct
# phys_per_port 4
# slot bay
#
# # PCI_ID HBA PORT CHANNEL NAME
# channel 85:00.0 1 A
# channel 85:00.0 0 B
# channel 86:00.0 1 C
# channel 86:00.0 0 D
#
# # Custom mapping for Channel A
#
# # Linux Mapped
# # Slot Slot Channel
# slot 1 7 A
# slot 2 10 A
# slot 3 3 A
# slot 4 6 A
#
# # Default mapping for B, C, and D
# slot 1 4
# slot 2 2
# slot 3 1
# slot 4 3
# #
# # Example vdev_id.conf - sas_switch
# #
#
# topology sas_switch
#
# # SWITCH PORT CHANNEL NAME
# channel 1 A
# channel 2 B
# channel 3 C
# channel 4 D
# #
# # Example vdev_id.conf - multipath
# #
#
# multipath yes
#
# # PCI_ID HBA PORT CHANNEL NAME
# channel 85:00.0 1 A
# channel 85:00.0 0 B
# channel 86:00.0 1 A
# channel 86:00.0 0 B
# #
# # Example vdev_id.conf - multipath / multijbod-daisychaining
# #
#
# multipath yes
# multijbod yes
#
# # PCI_ID HBA PORT CHANNEL NAME
# channel 85:00.0 1 A
# channel 85:00.0 0 B
# channel 86:00.0 1 A
# channel 86:00.0 0 B
# #
# # Example vdev_id.conf - multipath / mixed
# #
#
# multipath yes
# slot mix
#
# # PCI_ID HBA PORT CHANNEL NAME
# channel 85:00.0 3 A
# channel 85:00.0 2 B
# channel 86:00.0 3 A
# channel 86:00.0 2 B
# channel af:00.0 0 C
# channel af:00.0 1 C
# #
# # Example vdev_id.conf - alias
# #
#
# # by-vdev
# # name fully qualified or base name of device link
# alias d1 /dev/disk/by-id/wwn-0x5000c5002de3b9ca
# alias d2 wwn-0x5000c5002def789e
PATH=/bin:/sbin:/usr/bin:/usr/sbin
CONFIG=/etc/zfs/vdev_id.conf
PHYS_PER_PORT=
DEV=
TOPOLOGY=
BAY=
ENCL_ID=""
UNIQ_ENCL_ID=""
ZPAD=1
usage() {
cat << EOF
Usage: vdev_id [-h]
vdev_id <-d device> [-c config_file] [-p phys_per_port]
[-g sas_direct|sas_switch|scsi] [-m]
-c specify name of an alternative config file [default=$CONFIG]
-d specify basename of device (i.e. sda)
-e Create enclose device symlinks only (/dev/by-enclosure)
-g Storage network topology [default="$TOPOLOGY"]
-m Run in multipath mode
-j Run in multijbod mode
-p number of phy's per switch port [default=$PHYS_PER_PORT]
-h show this summary
EOF
exit 1
# exit with error to avoid processing usage message by a udev rule
}
map_slot() {
LINUX_SLOT=$1
CHANNEL=$2
MAPPED_SLOT=$(awk -v linux_slot="$LINUX_SLOT" -v channel="$CHANNEL" \
'$1 == "slot" && $2 == linux_slot && \
($4 ~ "^"channel"$" || $4 ~ /^$/) { print $3; exit}' $CONFIG)
if [ -z "$MAPPED_SLOT" ] ; then
MAPPED_SLOT=$LINUX_SLOT
fi
printf "%0${ZPAD}d" "${MAPPED_SLOT}"
}
map_channel() {
MAPPED_CHAN=
PCI_ID=$1
PORT=$2
case $TOPOLOGY in
"sas_switch")
MAPPED_CHAN=$(awk -v port="$PORT" \
'$1 == "channel" && $2 == port \
{ print $3; exit }' $CONFIG)
;;
"sas_direct"|"scsi")
MAPPED_CHAN=$(awk -v pciID="$PCI_ID" -v port="$PORT" \
'$1 == "channel" && $2 == pciID && $3 == port \
{print $4}' $CONFIG)
;;
esac
printf "%s" "${MAPPED_CHAN}"
}
get_encl_id() {
set -- $(echo $1)
count=$#
i=1
while [ $i -le $count ] ; do
d=$(eval echo '$'{$i})
id=$(cat "/sys/class/enclosure/${d}/id")
ENCL_ID="${ENCL_ID} $id"
i=$((i + 1))
done
}
get_uniq_encl_id() {
for uuid in ${ENCL_ID}; do
found=0
for count in ${UNIQ_ENCL_ID}; do
if [ $count = $uuid ]; then
found=1
break
fi
done
if [ $found -eq 0 ]; then
UNIQ_ENCL_ID="${UNIQ_ENCL_ID} $uuid"
fi
done
}
# map_jbod explainer: The bsg driver knows the difference between a SAS
# expander and fanout expander. Use hostX instance along with top-level
# (whole enclosure) expander instances in /sys/class/enclosure and
# matching a field in an array of expanders, using the index of the
# matched array field as the enclosure instance, thereby making jbod IDs
# dynamic. Avoids reliance on high overhead userspace commands like
# multipath and lsscsi and instead uses existing sysfs data. $HOSTCHAN
# variable derived from devpath gymnastics in sas_handler() function.
map_jbod() {
DEVEXP=$(ls -l "/sys/block/$DEV/device/" | grep enclos | awk -F/ '{print $(NF-1) }')
DEV=$1
# Use "set --" to create index values (Arrays)
set -- $(ls -l /sys/class/enclosure | grep -v "^total" | awk '{print $9}')
# Get count of total elements
JBOD_COUNT=$#
JBOD_ITEM=$*
# Build JBODs (enclosure) id from sys/class/enclosure/<dev>/id
get_encl_id "$JBOD_ITEM"
# Different expander instances for each paths.
# Filter out and keep only unique id.
get_uniq_encl_id
# Identify final 'mapped jbod'
j=0
for count in ${UNIQ_ENCL_ID}; do
i=1
j=$((j + 1))
while [ $i -le $JBOD_COUNT ] ; do
d=$(eval echo '$'{$i})
id=$(cat "/sys/class/enclosure/${d}/id")
if [ "$d" = "$DEVEXP" ] && [ $id = $count ] ; then
MAPPED_JBOD=$j
break
fi
i=$((i + 1))
done
done
printf "%d" "${MAPPED_JBOD}"
}
sas_handler() {
if [ -z "$PHYS_PER_PORT" ] ; then
PHYS_PER_PORT=$(awk '$1 == "phys_per_port" \
{print $2; exit}' $CONFIG)
fi
PHYS_PER_PORT=${PHYS_PER_PORT:-4}
if ! echo "$PHYS_PER_PORT" | grep -q -E '^[0-9]+$' ; then
echo "Error: phys_per_port value $PHYS_PER_PORT is non-numeric"
exit 1
fi
if [ -z "$MULTIPATH_MODE" ] ; then
MULTIPATH_MODE=$(awk '$1 == "multipath" \
{print $2; exit}' $CONFIG)
fi
if [ -z "$MULTIJBOD_MODE" ] ; then
MULTIJBOD_MODE=$(awk '$1 == "multijbod" \
{print $2; exit}' $CONFIG)
fi
# Use first running component device if we're handling a dm-mpath device
if [ "$MULTIPATH_MODE" = "yes" ] ; then
# If udev didn't tell us the UUID via DM_NAME, check /dev/mapper
if [ -z "$DM_NAME" ] ; then
DM_NAME=$(ls -l --full-time /dev/mapper |
grep "$DEV"$ | awk '{print $9}')
fi
# For raw disks udev exports DEVTYPE=partition when
# handling partitions, and the rules can be written to
# take advantage of this to append a -part suffix. For
# dm devices we get DEVTYPE=disk even for partitions so
# we have to append the -part suffix directly in the
# helper.
if [ "$DEVTYPE" != "partition" ] ; then
# Match p[number], remove the 'p' and prepend "-part"
PART=$(echo "$DM_NAME" |
awk 'match($0,/p[0-9]+$/) {print "-part"substr($0,RSTART+1,RLENGTH-1)}')
fi
# Strip off partition information.
DM_NAME=$(echo "$DM_NAME" | sed 's/p[0-9][0-9]*$//')
if [ -z "$DM_NAME" ] ; then
return
fi
# Utilize DM device name to gather subordinate block devices
# using sysfs to avoid userspace utilities
# If our DEVNAME is something like /dev/dm-177, then we may be
# able to get our DMDEV from it.
DMDEV=$(echo $DEVNAME | sed 's;/dev/;;g')
if [ ! -e /sys/block/$DMDEV/slaves/* ] ; then
# It's not there, try looking in /dev/mapper
DMDEV=$(ls -l --full-time /dev/mapper | grep $DM_NAME |
awk '{gsub("../", " "); print $NF}')
fi
# Use sysfs pointers in /sys/block/dm-X/slaves because using
# userspace tools creates lots of overhead and should be avoided
# whenever possible. Use awk to isolate lowest instance of
# sd device member in dm device group regardless of string
# length.
DEV=$(ls "/sys/block/$DMDEV/slaves" | awk '
{ len=sprintf ("%20s",length($0)); gsub(/ /,0,str); a[NR]=len "_" $0; }
END {
asort(a)
print substr(a[1],22)
}')
if [ -z "$DEV" ] ; then
return
fi
fi
if echo "$DEV" | grep -q ^/devices/ ; then
sys_path=$DEV
else
sys_path=$(udevadm info -q path -p "/sys/block/$DEV" 2>/dev/null)
fi
# Use positional parameters as an ad-hoc array
set -- $(echo "$sys_path" | tr / ' ')
num_dirs=$#
scsi_host_dir="/sys"
# Get path up to /sys/.../hostX
i=1
while [ $i -le "$num_dirs" ] ; do
d=$(eval echo '$'{$i})
scsi_host_dir="$scsi_host_dir/$d"
echo "$d" | grep -q -E '^host[0-9]+$' && break
i=$((i + 1))
done
# Lets grab the SAS host channel number and save it for JBOD sorting later
HOSTCHAN=$(echo "$d" | awk -F/ '{ gsub("host","",$NF); print $NF}')
if [ $i = "$num_dirs" ] ; then
return
fi
PCI_ID=$(eval echo '$'{$((i -1))} | awk -F: '{print $2":"$3}')
# In sas_switch mode, the directory four levels beneath
# /sys/.../hostX contains symlinks to phy devices that reveal
# the switch port number. In sas_direct mode, the phy links one
# directory down reveal the HBA port.
port_dir=$scsi_host_dir
case $TOPOLOGY in
"sas_switch") j=$((i + 4)) ;;
"sas_direct") j=$((i + 1)) ;;
esac
i=$((i + 1))
while [ $i -le $j ] ; do
port_dir="$port_dir/$(eval echo '$'{$i})"
i=$((i + 1))
done
PHY=$(ls -vd "$port_dir"/phy* 2>/dev/null | head -1 | awk -F: '{print $NF}')
if [ -z "$PHY" ] ; then
PHY=0
fi
PORT=$((PHY / PHYS_PER_PORT))
# Look in /sys/.../sas_device/end_device-X for the bay_identifier
# attribute.
end_device_dir=$port_dir
while [ $i -lt "$num_dirs" ] ; do
d=$(eval echo '$'{$i})
end_device_dir="$end_device_dir/$d"
if echo "$d" | grep -q '^end_device' ; then
end_device_dir="$end_device_dir/sas_device/$d"
break
fi
i=$((i + 1))
done
# Add 'mix' slot type for environments where dm-multipath devices
# include end-devices connected via SAS expanders or direct connection
# to SAS HBA. A mixed connectivity environment such as pool devices
# contained in a SAS JBOD and spare drives or log devices directly
# connected in a server backplane without expanders in the I/O path.
SLOT=
case $BAY in
"bay")
SLOT=$(cat "$end_device_dir/bay_identifier" 2>/dev/null)
;;
"mix")
if [ $(cat "$end_device_dir/bay_identifier" 2>/dev/null) ] ; then
SLOT=$(cat "$end_device_dir/bay_identifier" 2>/dev/null)
else
SLOT=$(cat "$end_device_dir/phy_identifier" 2>/dev/null)
fi
;;
"phy")
SLOT=$(cat "$end_device_dir/phy_identifier" 2>/dev/null)
;;
"port")
d=$(eval echo '$'{$i})
SLOT=$(echo "$d" | sed -e 's/^.*://')
;;
"id")
i=$((i + 1))
d=$(eval echo '$'{$i})
SLOT=$(echo "$d" | sed -e 's/^.*://')
;;
"lun")
i=$((i + 2))
d=$(eval echo '$'{$i})
SLOT=$(echo "$d" | sed -e 's/^.*://')
;;
"bay_lun")
# Like 'bay' but with the LUN number appened. Added for SAS
# multi-actuator HDDs, where one physical drive has multiple
# LUNs, thus multiple logical drives share the same bay number
i=$((i + 2))
d=$(eval echo '$'{$i})
LUN="-lun$(echo "$d" | sed -e 's/^.*://')"
SLOT=$(cat "$end_device_dir/bay_identifier" 2>/dev/null)
;;
"ses")
# look for this SAS path in all SCSI Enclosure Services
# (SES) enclosures
sas_address=$(cat "$end_device_dir/sas_address" 2>/dev/null)
enclosures=$(lsscsi -g | \
sed -n -e '/enclosu/s/^.* \([^ ][^ ]*\) *$/\1/p')
for enclosure in $enclosures; do
set -- $(sg_ses -p aes "$enclosure" | \
awk "/device slot number:/{slot=\$12} \
/SAS address: $sas_address/\
{print slot}")
SLOT=$1
if [ -n "$SLOT" ] ; then
break
fi
done
;;
esac
if [ -z "$SLOT" ] ; then
return
fi
if [ "$MULTIJBOD_MODE" = "yes" ] ; then
CHAN=$(map_channel "$PCI_ID" "$PORT")
SLOT=$(map_slot "$SLOT" "$CHAN")
JBOD=$(map_jbod "$DEV")
if [ -z "$CHAN" ] ; then
return
fi
echo "${CHAN}"-"${JBOD}"-"${SLOT}${LUN}${PART}"
else
CHAN=$(map_channel "$PCI_ID" "$PORT")
SLOT=$(map_slot "$SLOT" "$CHAN")
if [ -z "$CHAN" ] ; then
return
fi
echo "${CHAN}${SLOT}${LUN}${PART}"
fi
}
scsi_handler() {
if [ -z "$FIRST_BAY_NUMBER" ] ; then
FIRST_BAY_NUMBER=$(awk '$1 == "first_bay_number" \
{print $2; exit}' $CONFIG)
fi
FIRST_BAY_NUMBER=${FIRST_BAY_NUMBER:-0}
if [ -z "$PHYS_PER_PORT" ] ; then
PHYS_PER_PORT=$(awk '$1 == "phys_per_port" \
{print $2; exit}' $CONFIG)
fi
PHYS_PER_PORT=${PHYS_PER_PORT:-4}
if ! echo "$PHYS_PER_PORT" | grep -q -E '^[0-9]+$' ; then
echo "Error: phys_per_port value $PHYS_PER_PORT is non-numeric"
exit 1
fi
if [ -z "$MULTIPATH_MODE" ] ; then
MULTIPATH_MODE=$(awk '$1 == "multipath" \
{print $2; exit}' $CONFIG)
fi
# Use first running component device if we're handling a dm-mpath device
if [ "$MULTIPATH_MODE" = "yes" ] ; then
# If udev didn't tell us the UUID via DM_NAME, check /dev/mapper
if [ -z "$DM_NAME" ] ; then
DM_NAME=$(ls -l --full-time /dev/mapper |
grep "$DEV"$ | awk '{print $9}')
fi
# For raw disks udev exports DEVTYPE=partition when
# handling partitions, and the rules can be written to
# take advantage of this to append a -part suffix. For
# dm devices we get DEVTYPE=disk even for partitions so
# we have to append the -part suffix directly in the
# helper.
if [ "$DEVTYPE" != "partition" ] ; then
# Match p[number], remove the 'p' and prepend "-part"
PART=$(echo "$DM_NAME" |
awk 'match($0,/p[0-9]+$/) {print "-part"substr($0,RSTART+1,RLENGTH-1)}')
fi
# Strip off partition information.
DM_NAME=$(echo "$DM_NAME" | sed 's/p[0-9][0-9]*$//')
if [ -z "$DM_NAME" ] ; then
return
fi
# Get the raw scsi device name from multipath -ll. Strip off
# leading pipe symbols to make field numbering consistent.
DEV=$(multipath -ll "$DM_NAME" |
awk '/running/{gsub("^[|]"," "); print $3 ; exit}')
if [ -z "$DEV" ] ; then
return
fi
fi
if echo "$DEV" | grep -q ^/devices/ ; then
sys_path=$DEV
else
sys_path=$(udevadm info -q path -p "/sys/block/$DEV" 2>/dev/null)
fi
# expect sys_path like this, for example:
# /devices/pci0000:00/0000:00:0b.0/0000:09:00.0/0000:0a:05.0/0000:0c:00.0/host3/target3:1:0/3:1:0:21/block/sdv
# Use positional parameters as an ad-hoc array
set -- $(echo "$sys_path" | tr / ' ')
num_dirs=$#
scsi_host_dir="/sys"
# Get path up to /sys/.../hostX
i=1
while [ $i -le "$num_dirs" ] ; do
d=$(eval echo '$'{$i})
scsi_host_dir="$scsi_host_dir/$d"
echo "$d" | grep -q -E '^host[0-9]+$' && break
i=$((i + 1))
done
if [ $i = "$num_dirs" ] ; then
return
fi
PCI_ID=$(eval echo '$'{$((i -1))} | awk -F: '{print $2":"$3}')
# In scsi mode, the directory two levels beneath
# /sys/.../hostX reveals the port and slot.
port_dir=$scsi_host_dir
j=$((i + 2))
i=$((i + 1))
while [ $i -le $j ] ; do
port_dir="$port_dir/$(eval echo '$'{$i})"
i=$((i + 1))
done
set -- $(echo "$port_dir" | sed -e 's/^.*:\([^:]*\):\([^:]*\)$/\1 \2/')
PORT=$1
SLOT=$(($2 + FIRST_BAY_NUMBER))
if [ -z "$SLOT" ] ; then
return
fi
CHAN=$(map_channel "$PCI_ID" "$PORT")
SLOT=$(map_slot "$SLOT" "$CHAN")
if [ -z "$CHAN" ] ; then
return
fi
echo "${CHAN}${SLOT}${PART}"
}
# Figure out the name for the enclosure symlink
enclosure_handler () {
# We get all the info we need from udev's DEVPATH variable:
#
# DEVPATH=/sys/devices/pci0000:00/0000:00:03.0/0000:05:00.0/host0/subsystem/devices/0:0:0:0/scsi_generic/sg0
# Get the enclosure ID ("0:0:0:0")
ENC="${DEVPATH%/*}"
ENC="${ENC%/*}"
ENC="${ENC##*/}"
if [ ! -d "/sys/class/enclosure/$ENC" ] ; then
# Not an enclosure, bail out
return
fi
# Get the long sysfs device path to our enclosure. Looks like:
# /devices/pci0000:00/0000:00:03.0/0000:05:00.0/host0/port-0:0/ ... /enclosure/0:0:0:0
ENC_DEVICE=$(readlink "/sys/class/enclosure/$ENC")
# Grab the full path to the hosts port dir:
# /devices/pci0000:00/0000:00:03.0/0000:05:00.0/host0/port-0:0
PORT_DIR=$(echo "$ENC_DEVICE" | grep -Eo '.+host[0-9]+/port-[0-9]+:[0-9]+')
# Get the port number
PORT_ID=$(echo "$PORT_DIR" | grep -Eo "[0-9]+$")
# The PCI directory is two directories up from the port directory
# /sys/devices/pci0000:00/0000:00:03.0/0000:05:00.0
PCI_ID_LONG="$(readlink -m "/sys/$PORT_DIR/../..")"
PCI_ID_LONG="${PCI_ID_LONG##*/}"
# Strip down the PCI address from 0000:05:00.0 to 05:00.0
PCI_ID="${PCI_ID_LONG#[0-9]*:}"
# Name our device according to vdev_id.conf (like "L0" or "U1").
NAME=$(awk "/channel/{if (\$1 == \"channel\" && \$2 == \"$PCI_ID\" && \
\$3 == \"$PORT_ID\") {print \$4\$3}}" $CONFIG)
echo "${NAME}"
}
alias_handler () {
# Special handling is needed to correctly append a -part suffix
# to partitions of device mapper devices. The DEVTYPE attribute
# is normally set to "disk" instead of "partition" in this case,
# so the udev rules won't handle that for us as they do for
# "plain" block devices.
#
# For example, we may have the following links for a device and its
# partitions,
#
# /dev/disk/by-id/dm-name-isw_dibgbfcije_ARRAY0 -> ../../dm-0
# /dev/disk/by-id/dm-name-isw_dibgbfcije_ARRAY0p1 -> ../../dm-1
# /dev/disk/by-id/dm-name-isw_dibgbfcije_ARRAY0p2 -> ../../dm-3
#
# and the following alias in vdev_id.conf.
#
# alias A0 dm-name-isw_dibgbfcije_ARRAY0
#
# The desired outcome is for the following links to be created
# without having explicitly defined aliases for the partitions.
#
# /dev/disk/by-vdev/A0 -> ../../dm-0
# /dev/disk/by-vdev/A0-part1 -> ../../dm-1
# /dev/disk/by-vdev/A0-part2 -> ../../dm-3
#
# Warning: The following grep pattern will misidentify whole-disk
# devices whose names end with 'p' followed by a string of
# digits as partitions, causing alias creation to fail. This
# ambiguity seems unavoidable, so devices using this facility
# must not use such names.
DM_PART=
if echo "$DM_NAME" | grep -q -E 'p[0-9][0-9]*$' ; then
if [ "$DEVTYPE" != "partition" ] ; then
# Match p[number], remove the 'p' and prepend "-part"
DM_PART=$(echo "$DM_NAME" |
awk 'match($0,/p[0-9]+$/) {print "-part"substr($0,RSTART+1,RLENGTH-1)}')
fi
fi
# DEVLINKS attribute must have been populated by already-run udev rules.
for link in $DEVLINKS ; do
# Remove partition information to match key of top-level device.
if [ -n "$DM_PART" ] ; then
link=$(echo "$link" | sed 's/p[0-9][0-9]*$//')
fi
# Check both the fully qualified and the base name of link.
for l in $link ${link##*/} ; do
if [ ! -z "$l" ]; then
alias=$(awk -v var="$l" '($1 == "alias") && \
($3 == var) \
{ print $2; exit }' $CONFIG)
if [ -n "$alias" ] ; then
echo "${alias}${DM_PART}"
return
fi
fi
done
done
}
# main
while getopts 'c:d:eg:jmp:h' OPTION; do
case ${OPTION} in
c)
CONFIG=${OPTARG}
;;
d)
DEV=${OPTARG}
;;
e)
# When udev sees a scsi_generic device, it calls this script with -e to
# create the enclosure device symlinks only. We also need
# "enclosure_symlinks yes" set in vdev_id.config to actually create the
# symlink.
ENCLOSURE_MODE=$(awk '{if ($1 == "enclosure_symlinks") \
print $2}' "$CONFIG")
if [ "$ENCLOSURE_MODE" != "yes" ] ; then
exit 0
fi
;;
g)
TOPOLOGY=$OPTARG
;;
p)
PHYS_PER_PORT=${OPTARG}
;;
j)
MULTIJBOD_MODE=yes
;;
m)
MULTIPATH_MODE=yes
;;
h)
usage
;;
esac
done
if [ ! -r "$CONFIG" ] ; then
echo "Error: Config file \"$CONFIG\" not found"
exit 1
fi
if [ -z "$DEV" ] && [ -z "$ENCLOSURE_MODE" ] ; then
echo "Error: missing required option -d"
exit 1
fi
if [ -z "$TOPOLOGY" ] ; then
TOPOLOGY=$(awk '($1 == "topology") {print $2; exit}' "$CONFIG")
fi
if [ -z "$BAY" ] ; then
BAY=$(awk '($1 == "slot") {print $2; exit}' "$CONFIG")
fi
ZPAD=$(awk '($1 == "zpad_slot") {print $2; exit}' "$CONFIG")
TOPOLOGY=${TOPOLOGY:-sas_direct}
# Should we create /dev/by-enclosure symlinks?
if [ "$ENCLOSURE_MODE" = "yes" ] && [ "$TOPOLOGY" = "sas_direct" ] ; then
ID_ENCLOSURE=$(enclosure_handler)
if [ -z "$ID_ENCLOSURE" ] ; then
exit 0
fi
# Just create the symlinks to the enclosure devices and then exit.
ENCLOSURE_PREFIX=$(awk '/enclosure_symlinks_prefix/{print $2}' "$CONFIG")
if [ -z "$ENCLOSURE_PREFIX" ] ; then
ENCLOSURE_PREFIX="enc"
fi
echo "ID_ENCLOSURE=$ID_ENCLOSURE"
echo "ID_ENCLOSURE_PATH=by-enclosure/$ENCLOSURE_PREFIX-$ID_ENCLOSURE"
exit 0
fi
# First check if an alias was defined for this device.
ID_VDEV=$(alias_handler)
if [ -z "$ID_VDEV" ] ; then
BAY=${BAY:-bay}
case $TOPOLOGY in
sas_direct|sas_switch)
ID_VDEV=$(sas_handler)
;;
scsi)
ID_VDEV=$(scsi_handler)
;;
*)
echo "Error: unknown topology $TOPOLOGY"
exit 1
;;
esac
fi
if [ -n "$ID_VDEV" ] ; then
echo "ID_VDEV=${ID_VDEV}"
echo "ID_VDEV_PATH=disk/by-vdev/${ID_VDEV}"
fi
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