3 # provide the shortest possible unique hardware path to a device
4 # for the Linux Persistent Device Naming scheme
6 # Copyright (C) 2005-2006 SUSE Linux Products GmbH
8 # Hannes Reinecke <hare@suse.de>
10 # This program is free software; you can redistribute it and/or modify it
11 # under the terms of the GNU General Public License as published by the
12 # Free Software Foundation version 2 of the License.
19 full_sysfs_device_path=
21 if [ -z "$DEVPATH" -a -z "$1" ] ; then
25 if [ -z "$DEVPATH" ] ; then
36 if [ ! -e $SYSFS$DEVPATH/dev ] ; then
42 cd "$SYSFS$DEVPATH/subsystem";
48 TYPE="${DEVPATH#/class/}"
60 local type offset port
63 for i in $type[0-9]* ; do
66 if [ "$port" -lt "$offset" ] ; then offset=$port ; fi
77 while [ ! -z "$host_dev_path" ] ; do
78 case "$host_dev_path" in
80 host_dev_path=${host_dev_path%/*}
96 platform_id=${DEV##*/}
98 while [ ! -z "$host_dev_path" ] ; do
99 case "$host_dev_path" in
101 host_dev_path=${host_dev_path%/*}
109 d="platform-$platform_id-$d"
111 d="platform-$platform_id"
121 serio_id=${DEV##*/serio}
123 while [ ! -z "$host_dev_path" ] ; do
124 case "$host_dev_path" in
126 host_dev_path=${host_dev_path%/*}
134 d="serio-$serio_id-$d"
145 local port idedev idecontroller
150 idecontroller=${idedev%/*}
151 # port info if the controller has more than one interface
154 : idedev $idedev kernel_port $port
163 echo "Error: $idedev is neither master or slave" >&2
167 offset="`get_port_offset ide ${port%.*}`"
169 : port offset $offset
170 port=$((${port%.*} - $offset))
172 d="ide-${port}:$channel-$d"
174 d="ide-${port}:$channel"
183 local cil controller_port controller_dev
188 target_id=${target_dev##*/target}
191 for tid in ${target_id}* ; do
192 target_num=$(( $target_num + 1 ))
194 controller_port=${target_dev%/*}
195 controller_dev="${controller_port%/*}"
196 : controller_dev $controller_dev
197 : controller_port $controller_port
198 # a host controller may have more than one interface/port
199 controller_port="${controller_port##*/host}"
202 controller_offset=$(get_port_offset host $controller_port)
204 controller_port=$(( $controller_port - $controller_offset))
205 scsi_id="scsi-${controller_port}:${cil}"
218 if [ -f "$D/ieee1394_id" ] ; then
219 read ieee1394_id < $D/ieee1394_id
221 if [ -z "$ieee1394_id" ] ; then
226 fw_host_dev=${DEV%/fw-host*}
227 # IEEE1394 devices are always endpoints
228 d="ieee1394-0x$ieee1394_id"
236 local cil controller_port controller_dev
238 fc_tgt_hcil="${DEV##*/}"
239 fc_tgt_lun="${fc_tgt_hcil##*:}"
240 fc_tgt_path="${DEV%/*}"
241 fc_tgt_num="${fc_tgt_path##*/}"
242 fc_tgt_dev="${fc_tgt_path}/fc_transport:${fc_tgt_num}"
243 if [ -e "$fc_tgt_dev/port_name" ]; then
244 read wwpn < $fc_tgt_dev/port_name
246 if [ -z "$wwpn" ] ; then
252 # Linux currently knows about 32bit luns
253 tmp_lun3=$(printf "%04x" $(($fc_tgt_lun & 0xFFFF)))
254 tmp_lun2=$(printf "%04x" $(( ($fc_tgt_lun >> 16) & 0xFFFF)))
257 if (($fc_tgt_lun == 0)) ; then
258 lun="0x0000000000000000"
260 lun="0x${tmp_lun3}${tmp_lun2}${tmp_lun1}${tmp_lun0}"
262 controller_dev="${fc_tgt_path%/host[0-9]*}"
263 # FC devices are always endpoints
264 d="fc-${wwpn}:${lun}"
272 local cil adapter controller_dev
274 sas_host_path="${DEV%%/port*}"
275 sas_phy_path="${DEV#*/host*/}"
276 sas_phy_path="${sas_phy_path%%/target*}"
277 sas_phy_id="${sas_phy_path%%/*}"
278 sas_phy_id="${sas_phy_id##*port-}"
279 sas_port_id="${sas_phy_path%%/end_device*}"
280 sas_port_id="${sas_port_id##*port-}"
281 sas_end_id="${sas_phy_path##*end_device-}"
282 sas_phy_dev="/sys/class/sas_phy/phy-${sas_phy_id}"
283 if [ -e "$sas_phy_dev/sas_address" ]; then
284 read phy_address < $sas_phy_dev/sas_address
285 read phy_id < $sas_phy_dev/phy_identifier
287 if [ -z "$phy_address" ] ; then
288 : no initiator address
293 sas_port_dev="/sys/class/sas_port/port-${sas_port_id}"
294 if [ -e "$sas_port_dev/num_phys" ] ; then
295 read phy_port < $sas_port_dev/num_phys
297 if [ -z "$phy_port" ] ; then
298 : no initiator address
303 sas_phy_address="$phy_address:$phy_port:$phy_id"
304 sas_end_dev="/sys/class/sas_device/end_device-${sas_end_id}"
305 if [ -e "$sas_end_dev/sas_address" ]; then
306 read end_address < $sas_end_dev/sas_address
307 read end_id < $sas_end_dev/phy_identifier
309 if [ -z "$end_address" ] ; then
310 : no initiator address
315 sas_end_address="$end_address:$end_id"
316 controller_dev="${sas_host_path%/host[0-9]*}"
317 # SAS devices are always endpoints
318 d="sas-${sas_phy_address}-${sas_end_address}"
325 local iscsi_session_dir
326 local iscsi_session iscsi_session_path
327 local iscsi_connection iscsi_connection_path
330 iscsi_session_dir="${DEV%%/target*}"
331 iscsi_session="${iscsi_session_dir##*/}"
332 iscsi_session_path=/sys/class/iscsi_session/${iscsi_session}
333 if [ ! -d "$iscsi_session_path" ] ; then
334 : no iSCSI session path
338 # Currently we're not doing MC/S
339 for conn in ${iscsi_session_dir}/connection* ; do
340 iscsi_conn_num=${conn##*:}
341 if [ "$iscsi_conn_num" = '0' ] ; then
342 iscsi_connection=$(basename $conn)
345 if [ -z "$iscsi_connection" ] ; then
346 : no iSCSI connection found
350 iscsi_connection_path=/sys/class/iscsi_connection/${iscsi_connection}
351 if [ ! -d "$iscsi_connection_path" ] ; then
352 : no iSCSI connection path
356 if [ -e "${iscsi_session_path}/targetname" ]; then
357 read iscsi_tgtname < ${iscsi_session_path}/targetname
359 if [ -z "$iscsi_tgtname" ] ; then
360 : No iSCSI Targetname
364 if [ -e "${iscsi_connection_path}/persistent_address" ] ; then
365 read iscsi_address < ${iscsi_connection_path}/persistent_address
367 if [ -z "$iscsi_address" ] ; then
368 : No iSCSI Target address
372 if [ -e "${iscsi_connection_path}/persistent_port" ] ; then
373 read iscsi_port < ${iscsi_connection_path}/persistent_port
375 iscsi_scsi_lun="${DEV##*:}"
376 d="ip-${iscsi_address}:${iscsi_port}-iscsi-${iscsi_tgtname}-lun-${iscsi_scsi_lun}"
386 port_num=${port_id#*-}
388 while [ ! -z "$host_dev_path" ] ; do
389 case "$host_dev_path" in
391 usb_host_path=$host_dev_path
392 host_dev_path="${host_dev_path%/*}"
399 : host_dev_path $host_dev_path
400 usb_host_num=${usb_host_path##*/usb}
403 usb_host_offset=$(get_port_offset usb $usb_host_num)
404 usb_host_port=$(($usb_host_num - $usb_host_offset))
407 d="usb-$usb_host_port:$port_num-${d}"
409 d="usb-$usb_host_port:$port_num"
416 full_sysfs_path="$SYSFS$DEVPATH"
420 if [ -L $full_sysfs_path/subsystem ]; then
421 full_sysfs_path="${full_sysfs_path%/*}"
422 cd "$full_sysfs_path/subsystem";
425 subsys="${subsys##*/}"
426 if [ "$subsys" = "block" ]; then
427 # parent is "block", it's a partition, move one up
428 full_sysfs_path="${full_sysfs_path%/*}"
435 if [ ! -L $full_sysfs_path/device ] ; then
436 if [ -f $full_sysfs_path/range ] ; then return ; fi
437 full_sysfs_path="${full_sysfs_path%/*}"
438 : full_sysfs_path "$full_sysfs_path"
439 if [ ! -L $full_sysfs_path/device -o ! -f $full_sysfs_path/dev ] ; then
443 cd $full_sysfs_path/device
446 full_sysfs_device_path="`pwd -P`"
448 D=$full_sysfs_device_path
449 while [ ! -z "$D" ] ; do
451 */ide[0-9]/[0-9].[0-9]*|*/ide[0-9][0-9]/[0-9][0-9].[0-9]*)
455 if [ -r $full_sysfs_device_path/wwpn ]; then
456 read wwpn < $full_sysfs_device_path/wwpn
458 if [ -r $full_sysfs_device_path/fcp_lun ]; then
459 read lun < $full_sysfs_device_path/fcp_lun
461 if [ -r $full_sysfs_device_path/hba_id ]; then
462 read bus_id < $full_sysfs_device_path/hba_id
464 if [ "$bus_id" -a "$wwpn" -a "$lun" ]; then
466 d="ccw-$bus_id-zfcp-$wwpn:$lun"
477 */rport-[0-9]*:[0-9]*-[0-9]*/*)
480 */end_device-[0-9]*:[0-9]*:[0-9]*/*)
490 */host[0-9]*/[0-9]*:[0-9]*:[0-9]*:[0-9]*)
493 */usb[0-9]*/[0-9]*/*)
515 if [ "$TYPE" = "scsi_tape" ] ; then
516 devname=${full_sysfs_path##*/}
517 rewind="${devname%%st*}"
518 mode="${devname##*st}"
534 d="$d-${rewind}st${mode}"