mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-25 02:49:32 +03:00
cefef28e98
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
805 lines
21 KiB
Bash
Executable File
805 lines
21 KiB
Bash
Executable File
#!/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
|