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Text File  |  2006-05-02  |  9KB  |  397 lines
  1. #!/bin/sh
  2.  
  3. # provide the shortest possible unique hardware path to a block device
  4. # for the udev persistent disk device naming scheme
  5. #
  6. # Copyright (C) 2005 SUSE Linux Products GmbH
  7. # Author:
  8. #    Hannes Reinecke <hare@suse.de>
  9. #
  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.
  13. #
  14. # to be called from a udev rule to return the name for a symlink
  15. #    DEVPATH=/block/sda/sda3 path_id
  16. #    path_id <devpath>
  17.  
  18. # example for all block devices on a system:
  19. #    for i in `find /sys/block -name dev` ;do DEVPATH="`echo $i | sed -e 's@^/sys\|/dev@@g'`" path_id ; done
  20.  
  21. # examples:
  22. # SCSI cdrom
  23. # /block/sr0 -> /devices/pci0002:30/0002:30:0c.0/host0/0:0:1:0
  24. # result: pci-0002:30:0c.0-scsi-0:0:1:0
  25. # SCSI disk
  26. # /block/sda -> /devices/pci0002:30/0002:30:0c.0/host0/0:0:4:0
  27. # result: pci-0002:30:0c.0-scsi-0:0:4:0 
  28. # SATA disk, 4 channels per controller
  29. # /block/sda -> /devices/pci0001:00/0001:00:07.0/0001:05:0c.0/host0/0:0:0:0
  30. # result: pci-0001:05:0c.0-scsi-0:0:0:0
  31. # IDE disk
  32. # /block/hda -> /devices/pci0002:02/0002:02:0d.0/ide0/0.0
  33. # result: pci-0002:02:0d.0-ide-0.0
  34. # IDE cdrom on a Mac ASIC:
  35. # /block/hdc -> /devices/pci0001:01/0001:01:17.0/0.80000000:mac-io/0.00020000:ata-3/ide1/1.0
  36. # result: mac-io_ata-3_master
  37. # IDE cdrom on a Mac ASIC, with ide-scsi:
  38. # /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
  39. # result: mac-io_ata-4_slave
  40.  
  41. # USB CDrom drive without 'serial' number:
  42. # reusing 'product' and 'manufacturer' string, if available
  43. # /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
  44. # result: usb-storage-odd-Freecom-USIDERev930:0:0:0
  45.  
  46. # devices may have several interfaces on one PCI device, like IDE:
  47. # pci-0001:00:04.0_ide1-master
  48. # pci-0001:00:04.0_ide2-master
  49. # pci-0001:00:04.0_ide2-slave
  50. # they are marked as ports, it is expected that the driver shows
  51. # ide1 even if there is nothing connected to either master or slave
  52. # interface
  53. #
  54. # match order is important.
  55. # first IDE to find ide-scsi devices.
  56. # then SCSI
  57. # first usb-storage
  58. # then firewire sbp2
  59. # then the rest
  60.  
  61. SYSFS=/sys
  62. RESULT=1
  63. CDROM=
  64. TYPE=
  65. OPWD="`pwd`"
  66. # Check for 'pwd -P'
  67. if $(pwd -P > /dev/null 2>&1); then
  68.     pwd_cmd="pwd -P"
  69. else
  70.     pwd_cmd="pwd"
  71. fi
  72. full_sysfs_class_path=
  73. full_sysfs_device_path=
  74.  
  75. if [ -z "$DEVPATH" -a -z "$1" ] ; then
  76.     exit 1
  77. fi
  78.  
  79. if [ -z "$DEVPATH" ] ; then
  80.     case "$1" in
  81.     $SYSFS/*)
  82.         DEVPATH="${1#$SYSFS}"
  83.         ;;
  84.     *)
  85.         DEVPATH=$1
  86.         ;;
  87.     esac
  88. fi
  89.  
  90. if [ ! -d $SYSFS$DEVPATH ] ; then
  91.     exit 1
  92. fi
  93. if [ ! -f $SYSFS$DEVPATH/dev ] ; then
  94.     exit 1
  95. fi
  96.  
  97. case "$DEVPATH" in
  98.     /block/*)
  99.     TYPE=block
  100.     ;;
  101.     /class/*)
  102.     TYPE="${DEVPATH#/class/}"
  103.     TYPE="${TYPE%%/*}"
  104.     ;;
  105.     *)
  106.     exit 1
  107.     ;;
  108. esac
  109.     
  110. #
  111. ##
  112. #
  113.  
  114. get_port () {
  115.     local type offset port
  116.     type=$1
  117.     offset=$2
  118.     for i in $type[0-9]* ; do
  119.     : i $i
  120.     port="${i#$type}"
  121.     if [ "$port" -lt "$offset" ] ; then offset=$port ; fi
  122.     done
  123.     if [ "$port" != "0" ] ; then
  124.     echo $(($2 - $offset))
  125.     fi
  126. }
  127.  
  128. handle_block_ide () {
  129. : handle_block_ide $*
  130.     local DEV=$1
  131.     local port idedev idecontroller
  132.     # IDE
  133.     : DEV $DEV
  134.     d=$DEV
  135.     case "$DEV" in
  136.     # remove ide-scsi part, leave only channel info
  137.         */ide[0-9]*/host[0-9]*)
  138.         while [ ! -z "$d" ] ; do
  139.             case "$d" in
  140.                 */host[0-9]*)
  141.                 d="${d%/*}"
  142.                 continue
  143.                 ;;
  144.                 *)
  145.                 break
  146.                 ;;
  147.             esac
  148.         done
  149.         ;;
  150.     esac
  151.     idedev=$d
  152.     while [ ! -z "$d" ] ; do
  153.         case "$d" in
  154.             */ide[0-9]*)
  155.             port="${d##*/}"
  156.             d="${d%/*}"
  157.             continue
  158.             ;;
  159.             *)
  160.             break
  161.             ;;
  162.         esac
  163.     done
  164.     idecontroller=$d
  165.     # port info if the controller has more than one interface
  166.     port="${port#ide}"
  167.     : port $port d $d
  168.     : idedev $idedev kernel_port $port
  169.     case "${idedev##*.}" in
  170.          0)
  171.          channel=0
  172.          ;;
  173.          1)
  174.          channel=1
  175.          ;;
  176.          *)
  177.          echo "Error: $idedev is neither master or slave" >&2
  178.     esac
  179.     case "$d" in
  180.         *:mac-io/*)
  181.         : mac-io: $d
  182.         d="`echo $d | sed -e 's@^.*:mac-io[^:]\+:\([^/]\+\).*@mac-io_\1@'`"
  183.         ;;
  184.         /sys/devices)
  185.         # PCMCIA devices
  186.         ifname=${full_sysfs_class_path##*/}
  187.         set -- `sed -n "/$ifname/p" /var/lib/pcmcia/stab`
  188.         d="pcmcia-$1"
  189.         ;;
  190.         *)
  191.         d="pci-${d##*/}"
  192.         # d="`echo $d | sed -e 's@^.*/\([^/]\{1,\}\)/.@pci-\1@'`"
  193.         ;;
  194.     esac
  195.  
  196.     cd $idecontroller
  197.     port="`get_port ide $port`"
  198.     cd "$OPWD"
  199.     :  hardware_port $port
  200.     if [ -z "$port" ] ; then
  201.         d="${d}-ide-0:$channel"
  202.     else
  203.         d="${d}-ide-${port}:$channel"
  204.     fi
  205.        
  206.     RESULT=0
  207. }
  208.  
  209. handle_block_scsi () {
  210. : handle_block_scsi $*
  211.     local DEV=$1
  212.     local cil controller_port controller_dev
  213.     # SCSI device
  214.     cil="${DEV##*/}"
  215.     cil="${cil#*:}"
  216.     controller_dev=$DEV
  217.     while [ ! -z "$controller_dev" ] ; do
  218.         case "$controller_dev" in
  219.             */host[0-9]*)
  220.             controller_port=$controller_dev
  221.             controller_dev="${controller_dev%/*}"
  222.             ;;
  223.             *) break ;;
  224.         esac
  225.     done
  226.     : controller_dev $controller_dev
  227.     : controller_port $controller_port
  228.     # a host controller may have more than one interface/port
  229.     controller_port="${controller_port##*/}"
  230.     controller_port="${controller_port##host}"
  231.     #
  232.     case "$controller_dev" in
  233.         # grand central, old powermacs
  234.         *:gc/*)
  235.         adapter="`echo $controller_dev |  sed -e 's@/[^/]\{1,\}$@@;s@^.*/@@;s@^.*:@@'`"
  236.         bus="gc"
  237.         ;;
  238.         # PARISC devices
  239.         *parisc*)
  240.         adapter="${controler_dev##*/}"
  241.         bus=parisc;
  242.         ;;
  243.         *)
  244.         adapter="${controller_dev##*/}"
  245.         bus="pci"
  246.         ;;
  247.     esac
  248.     cd "$controller_dev"
  249.     controller_port="`get_port host $controller_port`"
  250.     cd "$OPWD"
  251.     d="$bus-$adapter"
  252.     if [ -z "$controller_port" ] ; then
  253.         controller_port=0
  254.     fi
  255.     d="${d}-scsi-${controller_port}:${cil}"
  256.     RESULT=0
  257. }
  258.  
  259. handle_block_usb_storage () {
  260. : handle_block_usb_storage $*
  261.     local DEV=$1
  262.     cil="${DEV##*/}"
  263.     cil="${cil#*:}"
  264.     controller_dev=$DEV
  265.     while [ ! -z "$controller_dev" ] ; do
  266.         case "$controller_dev" in
  267.             */host[0-9]*)
  268.             controller_dev="${controller_dev%/*}"
  269.             ;;
  270.             *) break ;;
  271.         esac
  272.     done
  273.     : controller_dev $controller_dev
  274.     #
  275.     # usb-storage devs have a serial number, hopefully unique
  276.     serial=
  277.     if [ -f $controller_dev/../serial ] ; then
  278.         serial="`sed -e 's@^[ -]\{1,\}\|[ -]\{1,\}$@@g;s@[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789]@@g' < $controller_dev/../serial`"
  279.         : serial XXX_${serial}_XXX
  280.         d="usb-$serial"
  281.         serial="`echo $serial | sed -e 's@[ 0]\{1,\}@@g'`"
  282.     fi
  283.     if [ -z "$serial" ] ; then
  284.         # no serial, broken device
  285.         # has eventually binary junk in vpd
  286.         identifier=
  287.         if [ -f $controller_dev/../product ] ; then
  288.         product="`sed -e 's@^[ -]\{1,\}\|[ -]\{1,\}$@@g;s@[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789]@@g' < $controller_dev/../product`"
  289.         fi
  290.         if [ -f $controller_dev/../manufacturer ] ; then
  291.         manufacturer="`sed -e 's@^[ -]\{1,\}\|[ -]\{1,\}$@@g;s@[^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789]@@g' < $controller_dev/../manufacturer`"
  292.         fi
  293.         if [ -z "$product" -o -z "$manufacturer" ] ; then
  294.             read idvendor < $controller_dev/../idVendor
  295.             read idproduct < $controller_dev/../idProduct
  296.             identifier="0x${idvendor}-0x${idproduct}"
  297.         else
  298.             identifier="${manufacturer}-${product}"
  299.         fi
  300.         d="usb-${identifier}"
  301.     fi
  302.     d="$d:$cil"
  303.     RESULT=0
  304.  
  305.  
  306. }
  307.  
  308. handle_block () {
  309.     full_sysfs_class_path="$SYSFS$DEVPATH"
  310.     if [ ! -f $full_sysfs_class_path/dev ] ; then return ; fi
  311.     # the main device has (hopefully) a symlink to the real device
  312.     # a partition is a subdir of the main (raw) device
  313.     if [ ! -L $full_sysfs_class_path/device ] ; then
  314.     if [ -f $full_sysfs_class_path/range ] ; then return ; fi
  315.     full_sysfs_class_path="${full_sysfs_class_path%/*}"
  316.     : full_sysfs_class_path "$full_sysfs_class_path"
  317.     if [ ! -L $full_sysfs_class_path/device -o ! -f $full_sysfs_class_path/dev ] ; then
  318.         return
  319.     fi
  320.     fi
  321.     cd $full_sysfs_class_path/device
  322.     full_sysfs_device_path="`$pwd_cmd`"
  323.     cd "$OPWD"
  324.     D=$full_sysfs_device_path
  325.     case "$D" in
  326.     */ide[0-9]/[0-9].[0-9]*|*/ide[0-9][0-9]/[0-9][0-9].[0-9]*)
  327.     handle_block_ide "$D"
  328.     ;;
  329.     */usb[0-9]*/[0-9]*/host[0-9]*/[0-9]*:[0-9]*:[0-9]*:[0-9]*)
  330.     handle_block_usb_storage "$D"
  331.     ;;
  332.     */css0/*)
  333.     if [ -r $full_sysfs_device_path/wwpn ]; then
  334.         read wwpn < $full_sysfs_device_path/wwpn
  335.     fi
  336.     if [ -r $full_sysfs_device_path/fcp_lun ]; then
  337.         read lun < $full_sysfs_device_path/fcp_lun
  338.     fi
  339.     if [ -r $full_sysfs_device_path/hba_id ]; then
  340.         read bus_id < $full_sysfs_device_path/hba_id
  341.     fi
  342.     if [ "$bus_id" -a "$wwpn" -a "$lun" ]; then
  343.         # S/390 zfcp adapter
  344.         d="ccw-$bus_id-zfcp-$wwpn:$lun"
  345.         RESULT=0
  346.     else
  347.         # DASD devices
  348.         bus="ccw"
  349.         adapter=${D##*/}
  350.         d="$bus-$adapter"
  351.         RESULT=0
  352.     fi
  353.     ;;
  354.     */host[0-9]*/[0-9]*:[0-9]*:[0-9]*:[0-9]*)
  355.     # check for ieee1394 sbp2 
  356.     if test -f $D/ieee1394_id ; then
  357.         read ieee1394_id < $D/ieee1394_id
  358.         d="`echo ieee1394-${ieee1394_id} | sed -e 's@:@-@g'`"
  359.         RESULT=0
  360.     else
  361.         handle_block_scsi "$D"
  362.     fi
  363.     ;;
  364.  
  365.     *)
  366.     : not handled
  367.     RESULT=1
  368.     return
  369.  
  370.     ;;
  371.     esac
  372.     # look for a partition
  373.     if [ "$full_sysfs_class_path" != "$SYSFS$DEVPATH" ] ; then
  374.     dp="`echo $SYSFS$DEVPATH | sed -e 's@^/.*/@@;s@^[^0-9]\{1,\}@@;s@.*_@@'`"
  375.     case "$d" in
  376.         *[0-9])
  377.         d="${d}p${dp}"
  378.         ;;
  379.         *)
  380.         d="${d}${dp}"
  381.         ;;
  382.     esac
  383.     fi
  384.     # done
  385.     echo "ID_PATH=$d"
  386. }
  387.  
  388. case "$TYPE" in
  389.     block)
  390.     handle_block
  391.     ;;
  392.     *)
  393.     RESULT=1
  394.     ;;
  395. esac
  396. exit $RESULT
  397.