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+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
#!/bin/bash
#
-# Set BUSES and PORTS to match the topology of your system. As each
-# port is enumerated it will be assigned the next channel name. The
-# current script enumerates each port on a bus before moving on to
-# enumerate the next bus.
+# Direct-Attached Mode
+# --------------------
+# Set BUSES and HOST_PORTS to match the topology of your system. As
+# each port is enumerated it will be assigned the next channel name.
+# The current script enumerates each port on a bus before moving on
+# to enumerate the next bus.
#
# Every distribution, version of udev, and type of attached storage
# seems to result in slightly different formatting of the by-path
# name. For this reason you may need to adjust the parsing below
# to suit your needs. This is one of the reasons to use a custom
-# /etc/zfs/zdev.conf file, it allows the by-path naming convertion
+# /etc/zfs/zdev.conf file, it allows the by-path naming convention
# to change and still keep the simple <channel><rank> naming.
#
+# SAS-Switch Mode
+# -------------------------
+# When the host accesses disk via SAS switches the combination of
+# bus and port number does not necessarily uniquely identify a
+# channel or disk drawer. In this case we must resort to other
+# means to infer the physical topology. For a single-level network
+# (i.e. no switch cascading) we can assign alphabetic channel labels
+# based on the switch port number that the drawer is connected to.
+# If support for more complex topologies is needed this script will
+# need to be customized or replaced.
+#
+# In SAS-Switch mode (enabled with "-g switch" ) we require that
+# udev has been configured to create per-disk symbolic links in
+# /dev/disk/by-id of the form
+# <label>-<UUID>-switch-port:<X>-slot:<Y>. <label> is a string that
+# depends on the subsystem that created the link and defaults to
+# "dm-uuid-mpath" (this prefix is used by multipathd). <UUID> is a
+# unique identifier for the disk typically obtained from the scsi_id
+# program. <X> and <Y> denote the switch port and disk slot
+# numbers, respectively, and are typically obtained from sysfs.
+
AWK=${AWK:-/usr/bin/awk}
CONFIG=${CONFIG:-/etc/zfs/zdev.conf}
BUSES=( 01 02 03 )
-PORTS=( 4 0 )
+HOST_PORTS=( 4 0 )
+SWITCH_PORTS=( 0 1 2 3 4 5 6 7 8 9 )
CHANNELS=( A B C D E F G H I J K L M N O P Q R S T U V W X Y Z )
+TOPOLOGY="direct"
TRIGGER="no"
MAPPING=linux
+LABEL=${LABEL:-"dm-uuid-mpath"}
+DEV_DISK_DIR="/dev/disk/by-path"
+shopt -s extglob
usage() {
cat << EOF
-Usage: zpool_layout [-th] [-c file] [-b buses] [-p ports] [-n channels] [-m map]
+Usage: zpool_layout [-th] [-c file] [-b buses] [-o switch_ports]
+ [-p host_ports] [-n channels] [-m map] [-l label]
+ [-g direct|switch]
-c Alternate config file [default=${CONFIG}]
-b Enumerate buses [default="${BUSES[*]}"]
- -p Enumerate ports [default="${PORTS[*]}"]
+ -o Enumerate switch ports [default="${SWITCH_PORTS[*]}"]
+ -p Enumerate host ports [default="${HOST_PORTS[*]}"]
-n Channel names [default="A..Z"]
+ -g Storage network topology [default="${TOPOLOGY}"]
-t Trigger and wait for udev to settle [default=${TRIGGER}]
+ -l Prefix of SAS-switch-mode device links [default=${LABEL}]
-m Slot mapping [default=${MAPPING}]
-h Show this message
EOF
exit 0
}
-while getopts 'c:b:p:n:m:th' OPTION; do
+while getopts 'c:b:o:p:n:l:m:g:th' OPTION; do
case ${OPTION} in
c)
CONFIG=${OPTARG}
b)
BUSES=(${OPTARG})
;;
+ o)
+ SWITCH_PORTS=(${OPTARG})
+ ;;
p)
- PORTS=(${OPTARG})
+ HOST_PORTS=(${OPTARG})
;;
n)
CHANNELS=(${OPTARG})
;;
+ l)
+ LABEL=${OPTARG}
+ ;;
m)
MAPPING=`readlink -e ${OPTARG}`
;;
+ g)
+ TOPOLOGY=${OPTARG}
+ ;;
t)
TRIGGER=yes
;;
# Save stdout as fd #8, then redirect stdout to the config file.
exec 8>&1
exec >${CONFIG}
-pushd /dev/disk/by-path >/dev/null
map_slot() {
local LINUX_SLOT=$1
printf "%d" ${MAPPED_SLOT}
}
-# Generate comment header.
-echo "#"
-echo "# Custom /dev/disk/by-path to /dev/disk/zpool mapping, "
-echo "# based of the following physical cable layout."
-echo "#"
-
# Generate host port layout table for comment header.
-echo "# ------------------ Host Port Layout ---------------------"
-echo -n "# "
-for (( i=0; i<${#BUSES[*]}; i++ )); do
- printf "%-8d" ${BUSES[$i]}
-done
-echo
+print_host_port_layout() {
+ echo "# ------------------ Host Port Layout ---------------------"
+ echo -n "# "
+ for (( i=0; i<${#BUSES[*]}; i++ )); do
+ printf "%-8d" ${BUSES[$i]}
+ done
+ echo
+
+ for (( i=0, k=0; i<${#HOST_PORTS[*]}; i++ )); do
+ printf "# Port %-2d " ${HOST_PORTS[$i]}
-for (( i=0, k=0; i<${#PORTS[*]}; i++ )); do
- printf "# Port %-2d " ${PORTS[$i]}
+ for (( j=0; j<${#BUSES[*]}; j++, k++ )); do
+ let k=$j*${#HOST_PORTS[*]}+$i
+ printf "%-8s" ${CHANNELS[$k]}
+ done
+ echo
+ done
+ echo "#"
+}
- for (( j=0; j<${#BUSES[*]}; j++, k++ )); do
- let k=$j*${#PORTS[*]}+$i
- printf "%-8s" ${CHANNELS[$k]}
+# Generate SAS switch port layout table for comment header.
+print_switch_port_layout() {
+ echo "# --------------- SAS Switch Port Layout ------------------"
+ echo -n "# Switch Port "
+ for (( i=0; i<${#SWITCH_PORTS[*]}; i++ )); do
+ printf "%3d" ${SWITCH_PORTS[$i]}
done
echo
-done
-echo "#"
+ echo -n "# Channel "
+ for (( i=0; i<${#SWITCH_PORTS[*]}; i++ )); do
+ printf "%3s" ${CHANNELS[$i]}
+ done
+ echo
+ echo "#"
+}
# Generate channel/disk layout table for comment header.
-echo "# ----------------- Channel/Disk Layout -------------------"
-echo "# Channel Disks"
-for (( i=0, k=0; i<${#BUSES[*]}; i++ )); do
- for (( j=0; j<${#PORTS[*]}; j++, k++ )); do
- printf "# %-9s" ${CHANNELS[$k]}
- ls *:${BUSES[$i]}:*:${PORTS[$j]}* 2>/dev/null | \
- cut -f7 -d'-' | sort -u -n | tr '\n' ','
- echo
- done
-done
-echo "#"
+print_channel_layout() {
+ pushd ${DEV_DISK_DIR} >/dev/null
+ echo "# ----------------- Channel/Disk Layout -------------------"
+ echo "# Channel Disks"
+ if [ ${TOPOLOGY} = "switch" ] ; then
+ for (( i=0; i<${#SWITCH_PORTS[*]}; i++ )); do
+ printf "# %-9s" ${CHANNELS[$i]}
+ p=${SWITCH_PORTS[$i]}
+ ls ${LABEL}-+([0-9a-f])-switch-port:${p}-slot:+([0-9]) \
+ 2>/dev/null | cut -f3 -d':' | sort -u -n | \
+ xargs | tr ' ' ','
+ done
+ else
+ for (( i=0, k=0; i<${#BUSES[*]}; i++ )); do
+ for (( j=0; j<${#HOST_PORTS[*]}; j++, k++ )); do
+ printf "# %-9s" ${CHANNELS[$k]}
+ ls *:${BUSES[$i]}:*:${HOST_PORTS[$j]}* \
+ 2>/dev/null | cut -f7 -d'-' | \
+ sort -u -n | xargs | tr ' ' ','
+ done
+ done
+ fi
+ echo "#"
+ popd > /dev/null
+}
# Generate mapping from <channel><rank> to by-path name.
-for (( i=0, k=0; i<${#BUSES[*]}; i++ )); do
- for (( j=0; j<${#PORTS[*]}; j++, k++ )); do
- BYPATH=(`ls *:${BUSES[$i]}:*:${PORTS[$j]}* 2>/dev/null | \
- grep -v part | sort -n -k7 -t'-' | cut -f1-6 -d'-'`)
- SLOTS=(`ls *:${BUSES[$i]}:*:${PORTS[$j]}* 2>/dev/null | \
- grep -v part | sort -n -k7 -t'-' | cut -f7 -d'-'`)
+map_shortname_to_by_path() {
+ pushd ${DEV_DISK_DIR} >/dev/null
+ for (( i=0, k=0; i<${#BUSES[*]}; i++ )); do
+ for (( j=0; j<${#HOST_PORTS[*]}; j++, k++ )); do
+ BYPATH=(`ls *:${BUSES[$i]}:*:${HOST_PORTS[$j]}* \
+ 2>/dev/null | grep -v part | \
+ sort -n -k7 -t'-' | cut -f1-6 -d'-'`)
+ SLOTS=(`ls *:${BUSES[$i]}:*:${HOST_PORTS[$j]}* \
+ 2>/dev/null | grep -v part | \
+ sort -n -k7 -t'-' | cut -f7 -d'-'`)
+ TMP_FILE=`mktemp`
+
+ for (( l=0; l<${#SLOTS[*]}; l++ )); do
+ MAPPED_SLOT=`map_slot ${SLOTS[$l]}`
+ printf "%s%d\t%s-%d\n" \
+ ${CHANNELS[$k]} ${MAPPED_SLOT} \
+ ${BYPATH[$l]} ${SLOTS[$l]} >>${TMP_FILE}
+ done
+
+ echo
+ echo -n "# Channel ${CHANNELS[$k]}, "
+ echo "Bus ${BUSES[$i]}, Port ${HOST_PORTS[$j]}"
+ cat ${TMP_FILE} | sort -n -k2 -t${CHANNELS[$k]}
+ rm -f ${TMP_FILE}
+ done
+ done
+ popd >/dev/null
+}
+
+# Generate mapping from <channel><rank> to by-id name.
+map_shortname_to_by_id() {
+ pushd ${DEV_DISK_DIR} >/dev/null
+ for (( i=0; i<${#SWITCH_PORTS[*]}; i++ )); do
+ p=${SWITCH_PORTS[$i]}
+ BYID=(`ls ${LABEL}-+([0-9a-f])-switch-port:${p}-slot:+([0-9]) \
+ 2>/dev/null | grep -v part | sort -k3n -t':' | \
+ cut -f1-2 -d':'`)
+ SLOTS=(`ls ${LABEL}-+([0-9a-f])-switch-port:${p}-slot:+([0-9]) \
+ 2>/dev/null | grep -v part | sort -k3n -t':' | \
+ cut -f3 -d':'`)
TMP_FILE=`mktemp`
for (( l=0; l<${#SLOTS[*]}; l++ )); do
MAPPED_SLOT=`map_slot ${SLOTS[$l]}`
- printf "%s%d\t%s-%d\n" \
- ${CHANNELS[$k]} ${MAPPED_SLOT} \
- ${BYPATH[$l]} ${SLOTS[$l]} >>${TMP_FILE}
+ printf "%s%d\t%s:%d\n" \
+ ${CHANNELS[$i]} ${MAPPED_SLOT} ${BYID[$l]} \
+ ${SLOTS[$l]} >>${TMP_FILE}
done
echo
- echo -n "# Channel ${CHANNELS[$k]}, "
- echo "Bus ${BUSES[$i]}, Port ${PORTS[$j]}"
- cat ${TMP_FILE} | sort -n -k2 -t${CHANNELS[$k]}
+ echo -n "# Channel ${CHANNELS[$i]}, "
+ echo "SAS Switch Port ${SWITCH_PORTS[$i]}"
+ cat ${TMP_FILE} | sort -n -k2 -t${CHANNELS[$i]}
rm -f ${TMP_FILE}
done
-done
+ popd > /dev/null
+}
+
+# Generate comment header.
+echo "#"
+echo "# Custom ${DEV_DISK_DIR} to /dev/disk/zpool mapping, "
+echo "# based of the following physical cable layout."
+echo "#"
+
+case ${TOPOLOGY} in
+ direct)
+ print_host_port_layout
+ print_channel_layout
+ map_shortname_to_by_path
+ ;;
+ switch)
+ DEV_DISK_DIR="/dev/disk/by-id"
+ print_switch_port_layout
+ print_channel_layout
+ map_shortname_to_by_id
+ ;;
+esac
# Restore stdout from fd #8 and close fd #8.
exec 1>&8 8>&-
-popd >/dev/null
if [ ${TRIGGER} = "yes" ]; then
udevadm trigger --action=change --subsystem-match=block
projects / mirror_zfs-debian.git / commitdiff