c641a99c6f
Hi, Greg. Appended is scsi-devfs.sh, a script for udev to implement devfs-style names for SCSI hard discs, CD-ROM's and generic devices. This has been tested with both hard discs and CD-ROM's. The SCSI generic support should be OK for when there is sysfs/udev support for SCSI generic devices. SCSI tapes are not yet implemented because I don't have one to test with. In addition, this script supports physical names, based on PCI bus location, both longhand (/udev/bus/pci/...) and shorthand (/udev/sd/pci/*).
89 lines
2.3 KiB
Bash
89 lines
2.3 KiB
Bash
#! /bin/sh
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#
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# scsi-devfs.sh: udev external PROGRAM script
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#
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# Copyright 2004 Richard Gooch <rgooch@atnf.csiro.au>
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# Copyright 2004 Fujitsu Ltd.
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# Distributed under the GNU Copyleft version 2.0.
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#
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# return devfs-names for scsi-devices
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# Usage in udev.rules:
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# BUS="scsi", KERNEL="sd*", PROGRAM="/etc/udev/scsi-devfs.sh sd %b %n", NAME="%c{1}", SYMLINK="%c{2} %k %c{3} %c{4}"
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# BUS="scsi", KERNEL="sr*", PROGRAM="/etc/udev/scsi-devfs.sh sr %b %n", NAME="%c{1}", SYMLINK="%c{2} %k %c{3} %c{4}"
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# BUS="scsi", KERNEL="st*", PROGRAM="/etc/udev/scsi-devfs.sh st %b %n", NAME="%c{1}", SYMLINK="%c{2} %k %c{3} %c{4}"
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# BUS="scsi", KERNEL="sg*", PROGRAM="/etc/udev/scsi-devfs.sh sg %b %n", NAME="%c{1}", SYMLINK="%c{2} %k %c{3} %c{4}"
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# Find out where sysfs is mounted. Exit if not available
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sysfs=`fgrep sysfs /proc/mounts | awk '{print $2}'`
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if [ "$sysfs" = "" ]; then
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echo "sysfs is required"
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exit 1
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fi
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cd $sysfs/bus/scsi/devices
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case "$1" in
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sd)
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# Extract partition component
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if [ "$3" = "" ]; then
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lpart="disc"
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spart=""
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else
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lpart="part$3"
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spart="p$3"
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fi
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;;
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sr)
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lpart="cdrom"
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spart=""
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;;
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st)
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# Not supported yet
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exit 1
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;;
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sg)
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lpart="generic"
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spart=""
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;;
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*)
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exit 1
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;;
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esac
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# Extract SCSI logical address components
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scsi_host=`echo $2 | cut -f 1 -d:`
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scsi_bus=`echo $2 | cut -f 2 -d:`
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scsi_target=`echo $2 | cut -f 3 -d:`
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scsi_lun=`echo $2 | cut -f 4 -d:`
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# Generate long and short common name parts
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l_com="bus$scsi_bus/target$scsi_target/lun$scsi_lun/$lpart"
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s_com="b${scsi_bus}t${scsi_target}u${scsi_lun}$spart"
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# Generate long and short logical names
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l_log="scsi/host$scsi_host/$l_com"
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s_log="$1/c${scsi_host}${s_com}"
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readlink $2 | fgrep -q pci
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if [ "$?" != "0" ]; then
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# Not a PCI controller, show logical locations only
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echo $l_log $s_log
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exit 0
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fi
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# Extract PCI address
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tmp=`readlink $2 | sed -e 's@/host.*/.*@@'`
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pci_addr=`basename "$tmp"`
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pci_domain=`echo $pci_addr | cut -f 1 -d:`
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pci_bus=`echo $pci_addr | cut -f 2 -d:`
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pci_slot=`echo $pci_addr | tr . : | cut -f 3 -d:`
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pci_function=`echo $pci_addr | cut -f 2 -d.`
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# Generate long and short physical names
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l_pci="domain$pci_domain/bus$pci_bus/slot$pci_slot/function$pci_function"
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l_phy="bus/pci/$l_pci/scsi/$l_com"
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s_phy="$1/pci/$pci_addr/$s_com"
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echo $l_phy $s_phy $l_log $s_log
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