extras/scsi-devfs.sh

   1 #! /bin/sh
   2 #
   3 #  scsi-devfs.sh: udev external PROGRAM script
   4 #
   5 #  Copyright 2004  Richard Gooch <rgooch@atnf.csiro.au>
   6 #  Copyright 2004  Fujitsu Ltd.
   7 #  Distributed under the GNU Copyleft version 2.0.
   8 #
   9 # return devfs-names for scsi-devices
  10 # Usage in udev.rules:
  11 # BUS="scsi", KERNEL="sd*", PROGRAM="/etc/udev/scripts/scsi-devfs.sh sd %b %n", NAME="%c{1}", SYMLINK="%c{2} %k %c{3} %c{4}"
  12 # BUS="scsi", KERNEL="sr*", PROGRAM="/etc/udev/scripts/scsi-devfs.sh sr %b %n", NAME="%c{1}", SYMLINK="%c{2} %k %c{3} %c{4}"
  13 # BUS="scsi", KERNEL="st*", PROGRAM="/etc/udev/scripts/scsi-devfs.sh st %b %n", NAME="%c{1}", SYMLINK="%c{2} %k %c{3} %c{4}"
  14 # BUS="scsi", KERNEL="sg*", PROGRAM="/etc/udev/scripts/scsi-devfs.sh sg %b %n", NAME="%c{1}", SYMLINK="%c{2} %k %c{3} %c{4}"
  15
  16 # Find out where sysfs is mounted. Exit if not available
  17 sysfs=`grep -F sysfs /proc/mounts | awk '{print $2}'`
  18 if [ "$sysfs" = "" ]; then
  19     echo "sysfs is required"
  20     exit 1
  21 fi
  22 cd $sysfs/bus/scsi/devices
  23
  24 case "$1" in
  25   sd)
  26     # Extract partition component
  27     if [ "$3" = "" ]; then
  28         lpart="disc"
  29         spart=""
  30     else
  31         lpart="part$3"
  32         spart="p$3"
  33     fi
  34     ;;
  35   sr)
  36     lpart="cdrom"
  37     spart=""
  38     ;;
  39   st)
  40     # Not supported yet
  41     exit 1
  42     ;;
  43   sg)
  44     lpart="generic"
  45     spart=""
  46     ;;
  47   *)
  48     exit 1
  49     ;;
  50 esac
  51
  52 # Extract SCSI logical address components
  53 scsi_host=`echo $2 | cut -f 1 -d:`
  54 scsi_bus=`echo $2 | cut -f 2 -d:`
  55 scsi_target=`echo $2 | cut -f 3 -d:`
  56 scsi_lun=`echo $2 | cut -f 4 -d:`
  57
  58 # Generate long and short common name parts
  59 l_com="bus$scsi_bus/target$scsi_target/lun$scsi_lun/$lpart"
  60 s_com="b${scsi_bus}t${scsi_target}u${scsi_lun}$spart"
  61
  62 # Generate long and short logical names
  63 l_log="scsi/host$scsi_host/$l_com"
  64 s_log="$1/c${scsi_host}${s_com}"
  65
  66 readlink $2 | grep -F -q pci
  67 if [ "$?" != "0" ]; then
  68     # Not a PCI controller, show logical locations only
  69     echo $l_log $s_log
  70     exit 0
  71 fi
  72
  73 # Extract PCI address
  74 tmp=`readlink $2 | sed -e 's@/host.*/.*@@'`
  75 pci_addr=`basename "$tmp"`
  76 pci_domain=`echo $pci_addr | cut -f 1 -d:`
  77 pci_bus=`echo $pci_addr | cut -f 2 -d:`
  78 pci_slot=`echo $pci_addr | tr . : | cut -f 3 -d:`
  79 pci_function=`echo $pci_addr | cut -f 2 -d.`
  80
  81 # Generate long and short physical names
  82 l_pci="domain$pci_domain/bus$pci_bus/slot$pci_slot/function$pci_function"
  83 l_phy="bus/pci/$l_pci/scsi/$l_com"
  84 s_phy="$1/pci/$pci_addr/$s_com"
  85
  86 echo $l_phy $s_phy $l_log $s_log
  87
  88