SOURCES: rescan-scsi-bus.sh (NEW) - 1.24
glen
glen at pld-linux.org
Tue Nov 13 14:53:00 CET 2007
Author: glen Date: Tue Nov 13 13:53:00 2007 GMT
Module: SOURCES Tag: HEAD
---- Log message:
- 1.24
---- Files affected:
SOURCES:
rescan-scsi-bus.sh (1.4 -> 1.5) (NEW)
---- Diffs:
================================================================
Index: SOURCES/rescan-scsi-bus.sh
diff -u /dev/null SOURCES/rescan-scsi-bus.sh:1.5
--- /dev/null Tue Nov 13 14:53:00 2007
+++ SOURCES/rescan-scsi-bus.sh Tue Nov 13 14:52:55 2007
@@ -0,0 +1,375 @@
+#!/bin/bash
+# Skript to rescan SCSI bus, using the
+# scsi add-single-device mechanism
+# (w) 1998-03-19 Kurt Garloff <kurt at garloff.de> (c) GNU GPL
+# (w) 2003-07-16 Kurt Garloff <garloff at suse.de> (c) GNU GPL
+# $Id$
+
+setcolor ()
+{
+ red="\e[0;31m"
+ green="\e[0;32m"
+ yellow="\e[0;33m"
+ bold="\e[0;1m"
+ norm="\e[0;0m"
+}
+
+unsetcolor ()
+{
+ red=""; green=""
+ yellow=""; norm=""
+}
+
+# Return hosts. sysfs must be mounted
+findhosts_26 ()
+{
+ hosts=
+ if ! ls /sys/class/scsi_host/host* >/dev/null 2>&1; then
+ echo "No SCSI host adapters found in sysfs"
+ exit 1;
+ #hosts=" 0"
+ #return
+ fi
+ for hostdir in /sys/class/scsi_host/host*; do
+ hostno=${hostdir#/sys/class/scsi_host/host}
+ hostname=`cat $hostdir/proc_name`
+ hosts="$hosts $hostno"
+ echo "Host adapter $hostno ($hostname) found."
+ done
+}
+
+# Return hosts. /proc/scsi/HOSTADAPTER/? must exist
+findhosts ()
+{
+ hosts=
+ for driverdir in /proc/scsi/*; do
+ driver=${driverdir#/proc/scsi/}
+ if test $driver = scsi -o $driver = sg -o $driver = dummy -o $driver = device_info; then continue; fi
+ for hostdir in $driverdir/*; do
+ name=${hostdir#/proc/scsi/*/}
+ if test $name = add_map -o $name = map -o $name = mod_parm; then continue; fi
+ num=$name
+ driverinfo=$driver
+ if test -r $hostdir/status; then
+ num=$(printf '%d\n' `sed -n 's/SCSI host number://p' $hostdir/status`)
+ driverinfo="$driver:$name"
+ fi
+ hosts="$hosts $num"
+ echo "Host adapter $num ($driverinfo) found."
+ done
+ done
+}
+
+# Get /proc/scsi/scsi info for device $host:$channel:$id:$lun
+# Optional parameter: Number of lines after first (default = 2),
+# result in SCSISTR, return code 1 means empty.
+procscsiscsi ()
+{
+ if test -z "$1"; then LN=2; else LN=$1; fi
+ CHANNEL=`printf "%02i" $channel`
+ ID=`printf "%02i" $id`
+ LUN=`printf "%02i" $lun`
+ if [ -d /sys/class/scsi_device ]; then
+ SCSIPATH="/sys/class/scsi_device/${host}:${channel}:${id}:${lun}"
+ if [ -d "$SCSIPATH" ] ; then
+ SCSISTR="Host: scsi${host} Channel: $CHANNEL Id: $ID Lun: $LUN"
+ if [ "$LN" -gt 0 ] ; then
+ IVEND=$(cat ${SCSIPATH}/device/vendor)
+ IPROD=$(cat ${SCSIPATH}/device/model)
+ IPREV=$(cat ${SCSIPATH}/device/rev)
+ SCSIDEV=$(printf ' Vendor: %-08s Model: %-16s Rev: %-4s' "$IVEND" "$IPROD" "$IPREV")
+ SCSISTR="$SCSISTR
+$SCSIDEV"
+ fi
+ if [ "$LN" -gt 1 ] ; then
+ ILVL=$(cat ${SCSIPATH}/device/scsi_level)
+ type=$(cat ${SCSIPATH}/device/type)
+ case "$type" in
+ 0) ITYPE="Direct-Access " ;;
+ 1) ITYPE="Sequential-Access" ;;
+ 2) ITYPE="Printer " ;;
+ 3) ITYPE="Processor " ;;
+ 4) ITYPE="WORM " ;;
+ 5) ITYPE="CD-ROM " ;;
+ 6) ITYPE="Scanner " ;;
+ 7) ITYPE="Optical Device " ;;
+ 8) ITYPE="Medium Changer " ;;
+ 9) ITYPE="Communications " ;;
+ 10) ITYPE="Unknown " ;;
+ 11) ITYPE="Unknown " ;;
+ 12) ITYPE="RAID " ;;
+ 13) ITYPE="Enclosure " ;;
+ 14) ITYPE="Direct-Access-RBC" ;;
+ *) ITYPE="Unknown " ;;
+ esac
+ SCSITMP=$(printf ' Type: %-16s ANSI SCSI revision: %02d' "$ITYPE" "$((ILVL - 1))")
+ SCSISTR="$SCSISTR
+$SCSITMP"
+ fi
+
+ else
+ return 1
+ fi
+ else
+ grepstr="scsi$host Channel: $CHANNEL Id: $ID Lun: $LUN"
+ SCSISTR=`cat /proc/scsi/scsi | grep -A$LN -e"$grepstr"`
+ fi
+ if test -z "$SCSISTR"; then return 1; else return 0; fi
+}
+
+# Find sg device with 2.6 sysfs support
+sgdevice26 ()
+{
+ if test -e /sys/class/scsi_device/$host\:$channel\:$id\:$lun/device/generic; then
+ SGDEV=`readlink /sys/class/scsi_device/$host\:$channel\:$id\:$lun/device/generic`
+ SGDEV=`basename $SGDEV`
+ else
+ for SGDEV in /sys/class/scsi_generic/sg*; do
+ DEV=`readlink $SGDEV/device`
+ if test "${DEV##*/}" = "$host:$channel:$id:$lun"; then
+ SGDEV=`basename $SGDEV`; return
+ fi
+ done
+ SGDEV=""
+ fi
+}
+
+# Find sg device with 2.4 report-devs extensions
+sgdevice24 ()
+{
+ if procscsiscsi 3; then
+ SGDEV=`echo "$SCSISTR" | grep 'Attached drivers:' | sed 's/^ *Attached drivers: \(sg[0-9]*\).*/\1/'`
+ fi
+}
+
+# Find sg device that belongs to SCSI device $host $channel $id $lun
+sgdevice ()
+{
+ SGDEV=
+ if test -d /sys/class/scsi_device; then
+ sgdevice26
+ else
+ DRV=`grep 'Attached drivers:' /proc/scsi/scsi 2>/dev/null`
+ repdevstat=$((1-$?))
+ if [ $repdevstat = 0 ]; then
+ echo "scsi report-devs 1" >/proc/scsi/scsi
+ DRV=`grep 'Attached drivers:' /proc/scsi/scsi 2>/dev/null`
+ if [ $? = 1 ]; then return; fi
+ fi
+ if ! `echo $DRV | grep 'drivers: sg' >/dev/null`; then
+ modprobe sg
+ fi
+ sgdevice24
+ if [ $repdevstat = 0 ]; then
+ echo "scsi report-devs 0" >/proc/scsi/scsi
+ fi
+ fi
+}
+
+# Test if SCSI device is still responding to commands
+testonline ()
+{
+ if test ! -x /usr/bin/sg_turs; then return 0; fi
+ sgdevice
+ if test -z "$SGDEV"; then return 0; fi
+ sg_turs /dev/$SGDEV >/dev/null 2>&1
+ RC=$?
+ #echo -e "\e[A\e[A\e[A${yellow}Test existence of $SGDEV = $RC ${norm} \n\n\n"
+ if test $RC = 1; then return $RC; fi
+ # OK, device online, compare INQUIRY string
+ INQ=`sg_inq -36 /dev/$SGDEV`
+ IVEND=`echo "$INQ" | grep 'Vendor identification:' | sed 's/^[^:]*: \(.*\)$/\1/'`
+ IPROD=`echo "$INQ" | grep 'Product identification:' | sed 's/^[^:]*: \(.*\)$/\1/'`
+ IPREV=`echo "$INQ" | grep 'Product revision level:' | sed 's/^[^:]*: \(.*\)$/\1/'`
+ STR=`printf " Vendor: %-08s Model: %-16s Rev: %-4s" "$IVEND" "$IPROD" "$IPREV"`
+ procscsiscsi
+ SCSISTR=`echo "$SCSISTR" | grep 'Vendor:'`
+ if [ "$SCSISTR" != "$STR" ]; then
+ echo -e "\e[A\e[A\e[A\e[A${red}$SGDEV changed: ${bold}\nfrom:${SCSISTR#* } \nto: $STR ${norm}\n\n\n"
+ return 1
+ fi
+ return $RC
+}
+
+# Test if SCSI device $host $channen $id $lun exists
+# Outputs description from /proc/scsi/scsi, returns SCSISTR
+testexist ()
+{
+ SCSISTR=
+ if procscsiscsi; then
+ echo "$SCSISTR" | head -n1
+ echo "$SCSISTR" | tail -n2 | pr -o4 -l1
+ fi
+}
+
+# Perform search (scan $host)
+dosearch ()
+{
+ for channel in $channelsearch; do
+ for id in $idsearch; do
+ for lun in $lunsearch; do
+ SCSISTR=
+ devnr="$host $channel $id $lun"
+ echo "Scanning for device $devnr ..."
+ printf "${yellow}OLD: $norm"
+ testexist
+ if test ! -z "$remove" -a ! -z "$SCSISTR"; then
+ # Device exists: Test whether it's still online
+ # (testonline returns 1 if it's gone or has changed)
+ testonline
+ if test $? = 1 -o ! -z "$forceremove"; then
+ echo -en "\r\e[A\e[A\e[A${red}REM: "
+ echo "$SCSISTR" | head -n1
+ echo -e "${norm}\e[B\e[B"
+ if test -e /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device; then
+ echo 1 > /sys/class/scsi_device/${host}:${channel}:${id}:${lun}/device/delete
+ # Try readding, should fail if device is gone
+ echo "$channel $id $lun" > /sys/class/scsi_host/host${host}/scan
+ else
+ echo "scsi remove-single-device $devnr" > /proc/scsi/scsi
+ # Try readding, should fail if device is gone
+ echo "scsi add-single-device $devnr" > /proc/scsi/scsi
+ fi
+ fi
+ printf "\r\x1b[A\x1b[A\x1b[A${yellow}OLD: $norm"
+ testexist
+ if test -z "$SCSISTR"; then
+ printf "\r${red}DEL: $norm\r\n\n\n\n"
+ let rmvd+=1;
+ fi
+ fi
+ if test -z "$SCSISTR"; then
+ # Device does not exist, try to add
+ printf "\r${green}NEW: $norm"
+ if test -e /sys/class/scsi_host/host${host}/scan; then
+ echo "$channel $id $lun" > /sys/class/scsi_host/host${host}/scan 2> /dev/null
+ else
+ echo "scsi add-single-device $devnr" > /proc/scsi/scsi
+ fi
+ testexist
+ if test -z "$SCSISTR"; then
+ # Device not present
+ printf "\r\x1b[A";
+ # Optimization: if lun==0, stop here (only if in non-remove mode)
+ if test $lun = 0 -a -z "$remove" -a $optscan = 1; then
+ break;
+ fi
+ else
+ let found+=1;
+ fi
+ fi
+ done
+ done
+ done
+}
+
+# main
+if test @$1 = @--help -o @$1 = @-h -o @$1 = @-?; then
+ echo "Usage: rescan-scsi-bus.sh [options] [host [host ...]]"
+ echo "Options:"
+ echo " -l activates scanning for LUNs 0-7 [default: 0]"
+ echo " -L NUM activates scanning for LUNs 0--NUM [default: 0]"
+ echo " -w scan for target device IDs 0 .. 15 [default: 0-7]"
+ echo " -c enables scanning of channels 0 1 [default: 0]"
+ echo " -r enables removing of devices [default: disabled]"
+ echo "--remove: same as -r"
+ echo "--forceremove: Remove and readd every device (DANGEROUS)"
+ echo "--nooptscan: don't stop looking for LUNs is 0 is not found"
+ echo "--color: use coloured prefixes OLD/NEW/DEL"
+ echo "--hosts=LIST: Scan only host(s) in LIST"
+ echo "--channels=LIST: Scan only channel(s) in LIST"
+ echo "--ids=LIST: Scan only target ID(s) in LIST"
+ echo "--luns=LIST: Scan only lun(s) in LIST"
+ echo " Host numbers may thus be specified either directly on cmd line (deprecated) or"
+ echo " or with the --hosts=LIST parameter (recommended)."
+ echo "LIST: A[-B][,C[-D]]... is a comma separated list of single values and ranges"
+ echo " (No spaces allowed.)"
+ exit 0
+fi
+
+expandlist ()
+{
+ list=$1
+ result=""
+ first=${list%%,*}
+ rest=${list#*,}
+ while test ! -z "$first"; do
+ beg=${first%%-*};
+ if test "$beg" = "$first"; then
+ result="$result $beg";
+ else
+ end=${first#*-}
+ result="$result `seq $beg $end`"
+ fi
+ test "$rest" = "$first" && rest=""
+ first=${rest%%,*}
+ rest=${rest#*,}
+ done
+ echo $result
+}
+
+if test ! -d /proc/scsi/; then
+ echo "Error: SCSI subsystem not active"
+ exit 1
+fi
+
+# Make sure sg is there
+modprobe sg >/dev/null 2>&1
+
+# defaults
+unsetcolor
+lunsearch="0"
+idsearch=`seq 0 7`
+channelsearch="0"
+remove=
+forceremove=
+optscan=1
+if test -d /sys/class/scsi_host; then
+ findhosts_26
+else
+ findhosts
+fi
+
+# Scan options
+opt="$1"
+while test ! -z "$opt" -a -z "${opt##-*}"; do
+ opt=${opt#-}
+ case "$opt" in
+ l) lunsearch=`seq 0 7` ;;
+ L) lunsearch=`seq 0 $2`; shift ;;
+ w) idsearch=`seq 0 15` ;;
+ c) channelsearch="0 1" ;;
+ r) remove=1 ;;
+ -remove) remove=1 ;;
+ -forceremove) remove=1; forceremove=1 ;;
+ -hosts=*) arg=${opt#-hosts=}; hosts=`expandlist $arg` ;;
+ -channels=*) arg=${opt#-channels=};channelsearch=`expandlist $arg` ;;
+ -ids=*) arg=${opt#-ids=}; idsearch=`expandlist $arg` ;;
+ -luns=*) arg=${opt#-luns=}; lunsearch=`expandlist $arg` ;;
+ -color) setcolor ;;
+ -nooptscan) optscan=0 ;;
+ *) echo "Unknown option -$opt !" ;;
+ esac
+ shift
+ opt="$1"
+done
+
+# Hosts given ?
+if test "@$1" != "@"; then
+ hosts=$*;
+fi
+
+echo "Scanning hosts $hosts channels $channelsearch for "
+echo " SCSI target IDs " $idsearch ", LUNs " $lunsearch
+test -z "$remove" || echo " and remove devices that have disappeared"
+declare -i found=0
+declare -i rmvd=0
+for host in $hosts; do
+ # YOU MAY NEED TO UNCOMMENT THESE TO ALLOW FOR A RESCAN
+ #test -e /sys/class/fc_host/host$host/issue_lip && echo 1 > /sys/class/fc_host/host$host/issue_lip 2> /dev/null;
+ #echo "- - -" > /sys/class/scsi_host/host$host/scan 2> /dev/null;
+ dosearch;
+done
+echo "$found new device(s) found. "
+echo "$rmvd device(s) removed. "
+
================================================================
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