diff options
Diffstat (limited to 'extras/path_id')
| -rwxr-xr-x | extras/path_id | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/extras/path_id b/extras/path_id new file mode 100755 index 0000000000..8391f2e586 --- /dev/null +++ b/extras/path_id @@ -0,0 +1,390 @@ +#!/bin/sh +#set -x + +# this script should provide the shortest possible unique hardware path +# to a block device +# + +# Horrible script. Handle with extreme care. + +# to be called from udev +# DEVPATH=/block/sda/sda3 $0 (or similar) +# $0 /block/sda +# $0 /sys/block/sda + +# example for all: +# for i in `find /sys/block -name dev` ;do DEVPATH="`echo $i | sed -e 's@^/sys\|/dev@@g'`" $0 ; done + +# examples: +# SCSI cdrom +# /block/sr0 -> /devices/pci0002:30/0002:30:0c.0/host0/0:0:1:0 +# result: pci-0002:30:0c.0-scsi-0:0:1:0 +# SCSI disk +# /block/sda -> /devices/pci0002:30/0002:30:0c.0/host0/0:0:4:0 +# result: pci-0002:30:0c.0-scsi-0:0:4:0 +# SATA disk, 4 channels per controller +# /block/sda -> /devices/pci0001:00/0001:00:07.0/0001:05:0c.0/host0/0:0:0:0 +# result: pci-0001:05:0c.0-scsi-0:0:0:0 +# IDE disk +# /block/hda -> /devices/pci0002:02/0002:02:0d.0/ide0/0.0 +# result: pci-0002:02:0d.0-ide-0.0 +# IDE cdrom on a Mac ASIC: +# /block/hdc -> /devices/pci0001:01/0001:01:17.0/0.80000000:mac-io/0.00020000:ata-3/ide1/1.0 +# result: mac-io_ata-3_master +# IDE cdrom on a Mac ASIC, with ide-scsi: +# /block/sr0 -> /devices/pci0001:01/0001:01:17.0/0.80000000:mac-io/0.0001f000:ata-4/ide0/0.1/host2/2:0:0:0 +# result: mac-io_ata-4_slave + +# USB CDrom drive without 'serial' number: +# reusing 'product' and 'manufacturer' string, if available +# /block/sr0 -> /devices/pci0001:00/0001:00:04.0/0001:02:0b.0/usb4/4-2/4-2:1.0/host4/4:0:0:0 +# result: usb-storage-odd-Freecom-USIDERev930:0:0:0 + +# devices may have several interfaces on one PCI device, like IDE: +# pci-0001:00:04.0_ide1-master +# pci-0001:00:04.0_ide2-master +# pci-0001:00:04.0_ide2-slave +# they are marked as ports, it is expected that the driver shows +# ide1 even if there is nothing connected to either master or slave +# interface +# +# match order is important. +# first IDE to find ide-scsi devices. +# then SCSI +# first usb-storage +# then firewire sbp2 +# then the rest + +PATH=/lib/klibc/bin #/usr:/usr/sbin:/usr/bin:/sbin:/bin +SYSFS=/sys +export PATH +RESULT=1 +CDROM= +TYPE= +OPWD="`pwd`" +# Check for 'pwd -P' +if $(pwd -P > /dev/null 2>&1); then + pwd_cmd="pwd -P" +else + pwd_cmd="pwd" +fi +full_sysfs_class_path= +full_sysfs_device_path= + +if [ -z "$DEVPATH" -a -z "$1" ] ; then + exit 1 +fi + +if [ -z "$DEVPATH" ] ; then + case "$1" in + $SYSFS/*) + DEVPATH="${1#$SYSFS}" + ;; + *) + DEVPATH=$1 + ;; + esac +fi + +if [ ! -d $SYSFS$DEVPATH ] ; then + exit 1 +fi +if [ ! -f $SYSFS$DEVPATH/dev ] ; then + exit 1 +fi + +case "$DEVPATH" in + /block/*) + TYPE=block + ;; + /class/*) + TYPE="${DEVPATH#/class/}" + TYPE="${TYPE%%/*}" + ;; + *) + exit 1 + ;; +esac + +# +## +# + +get_port () { + local type offset port + type=$1 + offset=$2 + for i in $type[0-9]* ; do + : i $i + port="${i#$type}" + if [ "$port" -lt "$offset" ] ; then offset=$port ; fi + done + if [ "$port" != "0" ] ; then + echo $(($2 - $offset)) + fi +} + +handle_block_ide () { +: handle_block_ide $* + local DEV=$1 + local port idedev idecontroller + # IDE + : DEV $DEV + d=$DEV + case "$DEV" in + # remove ide-scsi part, leave only channel info + */ide[0-9]*/host[0-9]*) + while [ ! -z "$d" ] ; do + case "$d" in + */host[0-9]*) + d="${d%/*}" + continue + ;; + *) + break + ;; + esac + done + ;; + esac + idedev=$d + while [ ! -z "$d" ] ; do + case "$d" in + */ide[0-9]*) + port="${d##*/}" + d="${d%/*}" + continue + ;; + *) + break + ;; + esac + done + idecontroller=$d + # port info if the controller has more than one interface + port="${port#ide}" + : port $port d $d + : idedev $idedev kernel_port $port + case "${idedev##*.}" in + 0) + channel=0 + ;; + 1) + channel=1 + ;; + *) + echo "Error: $idedev is neither master or slave" >&2 + esac + case "$d" in + *:mac-io/*) + : mac-io: $d + d="`echo $d | sed -e 's@^.*:mac-io[^:]\+:\([^/]\+\).*@mac-io_\1@'`" + ;; + /sys/devices) + # PCMCIA devices + ifname=${full_sysfs_class_path##*/} + set -- `sed -n "/$ifname/p" /var/lib/pcmcia/stab` + d="pcmcia-$1" + ;; + *) + d="pci-${d##*/}" + # d="`echo $d | sed -e 's@^.*/\([^/]\{1,\}\)/.@pci-\1@'`" + ;; + esac + + cd $idecontroller + port="`get_port ide $port`" + cd "$OPWD" + : hardware_port $port + if [ -z "$port" ] ; then + d="${d}-ide-0:$channel" + else + d="${d}-ide-${port}:$channel" + fi + + RESULT=0 +} + +handle_block_scsi () { +: handle_block_scsi $* + local DEV=$1 + local cil controller_port controller_dev + # SCSI device + cil="${DEV##*/}" + cil="${cil#*:}" + controller_dev=$DEV + while [ ! -z "$controller_dev" ] ; do + case "$controller_dev" in + */host[0-9]*) + controller_port=$controller_dev + controller_dev="${controller_dev%/*}" + ;; + *) break ;; + esac + done + : controller_dev $controller_dev + : controller_port $controller_port + # a host controller may have more than one interface/port + controller_port="${controller_port##*/}" + controller_port="${controller_port##host}" + # + case "$controller_dev" in + # grand central, old powermacs + *:gc/*) + adapter="`echo $controller_dev | sed -e 's@/[^/]\{1,\}$@@;s@^.*/@@;s@^.*:@@'`" + bus="gc" + ;; + *) + adapter="${controller_dev##*/}" + bus="pci" + ;; + esac + cd "$controller_dev" + controller_port="`get_port host $controller_port`" + cd "$OPWD" + d="$bus-$adapter" + if [ -z "$controller_port" ] ; then + controller_port=0 + fi + d="${d}-scsi-${controller_port}:${cil}" + RESULT=0 +} + +handle_block_usb_storage () { +: handle_block_usb_storage $* + local DEV=$1 + cil="${DEV##*/}" + cil="${cil#*:}" + controller_dev=$DEV + while [ ! -z "$controller_dev" ] ; do + case "$controller_dev" in + */host[0-9]*) + controller_dev="${controller_dev%/*}" + ;; + *) break ;; + esac + done + : controller_dev $controller_dev + # + # usb-storage devs have a serial number, hopefully unique + serial= + if [ -f $controller_dev/../serial ] ; then + serial="`sed -e 's@^[ -]\{1,\}\|[ -]\{1,\}$@@g;s@[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789]@@g' < $controller_dev/../serial`" + : serial XXX_${serial}_XXX + d="usb-$serial" + serial="`echo $serial | sed -e 's@[ 0]\{1,\}@@g'`" + fi + if [ -z "$serial" ] ; then + # no serial, broken device + # has eventually binary junk in vpd + identifier= + if [ -f $controller_dev/../product ] ; then + product="`sed -e 's@^[ -]\{1,\}\|[ -]\{1,\}$@@g;s@[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789]@@g' < $controller_dev/../product`" + fi + if [ -f $controller_dev/../manufacturer ] ; then + manufacturer="`sed -e 's@^[ -]\{1,\}\|[ -]\{1,\}$@@g;s@[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789]@@g' < $controller_dev/../manufacturer`" + fi + if [ -z "$product" -o -z "$manufacturer" ] ; then + read idvendor < $controller_dev/../idVendor + read idproduct < $controller_dev/../idProduct + identifier="0x${idvendor}-0x${idproduct}" + else + identifier="${manufacturer}-${product}" + fi + d="usb-${identifier}" + fi + d="$d:$cil" + RESULT=0 + + +} + +handle_block () { + full_sysfs_class_path="$SYSFS$DEVPATH" + if [ ! -f $full_sysfs_class_path/dev ] ; then return ; fi + # the main device has (hopefully) a symlink to the real device + # a partition is a subdir of the main (raw) device + if [ ! -L $full_sysfs_class_path/device ] ; then + if [ -f $full_sysfs_class_path/range ] ; then return ; fi + full_sysfs_class_path="${full_sysfs_class_path%/*}" + : full_sysfs_class_path "$full_sysfs_class_path" + if [ ! -L $full_sysfs_class_path/device -o ! -f $full_sysfs_class_path/dev ] ; then + return + fi + fi + cd $full_sysfs_class_path/device + full_sysfs_device_path="`$pwd_cmd`" + cd "$OPWD" + D=$full_sysfs_device_path + case "$D" in + */ide[0-9]/[0-9].[0-9]*|*/ide[0-9][0-9]/[0-9][0-9].[0-9]*) + handle_block_ide "$D" + ;; + */usb[0-9]*/[0-9]*/host[0-9]*/[0-9]*:[0-9]*:[0-9]*:[0-9]*) + handle_block_usb_storage "$D" + ;; + */css0/*) + if [ -r $full_sysfs_device_path/wwpn ]; then + read wwpn < $full_sysfs_device_path/wwpn + fi + if [ -r $full_sysfs_device_path/fcp_lun ]; then + read lun < $full_sysfs_device_path/fcp_lun + fi + if [ -r $full_sysfs_device_path/hba_id ]; then + read bus_id < $full_sysfs_device_path/hba_id + fi + if [ "$bus_id" -a "$wwpn" -a "$lun" ]; then + # S/390 zfcp adapter + d="ccw-$bus_id-zfcp-$wwpn:$lun" + RESULT=0 + else + # DASD devices + bus="ccw" + adapter=${D##*/} + d="$bus-$adapter" + RESULT=0 + fi + ;; + */host[0-9]*/[0-9]*:[0-9]*:[0-9]*:[0-9]*) + # check for ieee1394 sbp2 + if test -f $D/ieee1394_id ; then + read ieee1394_id < $D/ieee1394_id + d="`echo ieee1394-${ieee1394_id} | sed -e 's@:@-@g'`" + RESULT=0 + else + handle_block_scsi "$D" + fi + ;; + + *) + : not handled + RESULT=1 + return + + ;; + esac + # look for a partition + if [ "$full_sysfs_class_path" != "$SYSFS$DEVPATH" ] ; then + dp="`echo $SYSFS$DEVPATH | sed -e 's@^/.*/@@;s@^[^0-9]\{1,\}@@;s@.*_@@'`" + case "$d" in + *[0-9]) + d="${d}p${dp}" + ;; + *) + d="${d}${dp}" + ;; + esac + fi + # done + echo "ID_PATH=$d" +} + +case "$TYPE" in + block) + handle_block + ;; + *) + RESULT=1 + ;; +esac +exit $RESULT |